diff options
Diffstat (limited to 'xlators/cluster/dht/src/dht-common.c')
| -rw-r--r-- | xlators/cluster/dht/src/dht-common.c | 13908 |
1 files changed, 10538 insertions, 3370 deletions
diff --git a/xlators/cluster/dht/src/dht-common.c b/xlators/cluster/dht/src/dht-common.c index b0674f18e91..8ba0cc4c732 100644 --- a/xlators/cluster/dht/src/dht-common.c +++ b/xlators/cluster/dht/src/dht-common.c @@ -1,4223 +1,11391 @@ /* - Copyright (c) 2009-2009 Gluster, Inc. <http://www.gluster.com> - This file is part of GlusterFS. - - GlusterFS is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published - by the Free Software Foundation; either version 3 of the License, - or (at your option) any later version. - - GlusterFS is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program. If not, see - <http://www.gnu.org/licenses/>. -*/ - + Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com> + This file is part of GlusterFS. -#ifndef _CONFIG_H -#define _CONFIG_H -#include "config.h" -#endif + This file is licensed to you under your choice of the GNU Lesser + General Public License, version 3 or any later version (LGPLv3 or + later), or the GNU General Public License, version 2 (GPLv2), in all + cases as published by the Free Software Foundation. +*/ /* TODO: add NS locking */ -#include "glusterfs.h" -#include "xlator.h" +#include "libxlator.h" #include "dht-common.h" -#include "defaults.h" +#include "dht-lock.h" +#include <glusterfs/byte-order.h> +#include <glusterfs/quota-common-utils.h> +#include <glusterfs/upcall-utils.h> +#include "glusterfs/compat-errno.h" // for ENODATA on BSD +#include <glusterfs/common-utils.h> #include <sys/time.h> #include <libgen.h> +#include <signal.h> -/* TODO: - - use volumename in xattr instead of "dht" - - use NS locks - - handle all cases in self heal layout reconstruction - - complete linkfile selfheal -*/ +static int +dht_rmdir_readdirp_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, gf_dirent_t *entries, + dict_t *xdata); +static int +dht_link2(xlator_t *this, xlator_t *subvol, call_frame_t *frame, int ret); -int -dht_lookup_selfheal_cbk (call_frame_t *frame, void *cookie, - xlator_t *this, - int op_ret, int op_errno) +static int +dht_set_dir_xattr_req(xlator_t *this, loc_t *loc, dict_t *xattr_req); + +static int +dht_lookup_everywhere_done(call_frame_t *frame, xlator_t *this); + +static int +dht_common_mark_mdsxattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, dict_t *xdata); + +static int +dht_rmdir_unlock(call_frame_t *frame, xlator_t *this); + +static const char *dht_dbg_vxattrs[] = {DHT_DBG_HASHED_SUBVOL_PATTERN, NULL}; + +/* Check the xdata to make sure EBADF has been set by client xlator */ +int32_t +dht_check_remote_fd_failed_error(dht_local_t *local, int op_ret, int op_errno) { - dht_local_t *local = NULL; - dht_layout_t *layout = NULL; - int ret = 0; + if (op_ret == -1 && (op_errno == EBADF || op_errno == EBADFD) && + !(local->fd_checked)) { + return 1; + } + return 0; +} - local = frame->local; - ret = op_ret; +/* Sets the blocks and size values to fixed values. This is to be called + * only for dirs. The caller is responsible for checking the type + */ +int32_t +dht_set_fixed_dir_stat(struct iatt *stat) +{ + if (stat) { + stat->ia_blocks = DHT_DIR_STAT_BLOCKS; + stat->ia_size = DHT_DIR_STAT_SIZE; + return 0; + } + return -1; +} - if (ret == 0) { - layout = local->selfheal.layout; - ret = dht_layout_set (this, local->inode, layout); +/* Return true if key exists in array + */ +static gf_boolean_t +dht_match_xattr(const char *key) +{ + char **xattrs_to_heal = get_xattrs_to_heal(); - if (local->st_ino) { - local->stbuf.st_ino = local->st_ino; - } else { - gf_log (this->name, GF_LOG_DEBUG, - "could not find hashed subvolume for %s", - local->loc.path); - } + return gf_get_index_by_elem(xattrs_to_heal, (char *)key) >= 0; +} - if (local->loc.parent) - local->postparent.st_ino = local->loc.parent->ino; - } +static int +dht_aggregate_quota_xattr(dict_t *dst, char *key, data_t *value) +{ + int ret = -1; + quota_meta_t *meta_dst = NULL; + quota_meta_t *meta_src = NULL; + int64_t *size = NULL; + int64_t dst_dir_count = 0; + int64_t src_dir_count = 0; + + if (value == NULL) { + gf_msg("dht", GF_LOG_WARNING, 0, DHT_MSG_DATA_NULL, + "data value is NULL"); + ret = -1; + goto out; + } + + ret = dict_get_bin(dst, key, (void **)&meta_dst); + if (ret < 0) { + meta_dst = GF_CALLOC(1, sizeof(quota_meta_t), gf_common_quota_meta_t); + if (meta_dst == NULL) { + gf_msg("dht", GF_LOG_WARNING, ENOMEM, DHT_MSG_NO_MEMORY, + "Memory allocation failed"); + ret = -1; + goto out; + } + ret = dict_set_bin(dst, key, meta_dst, sizeof(quota_meta_t)); + if (ret < 0) { + gf_msg("dht", GF_LOG_WARNING, EINVAL, DHT_MSG_DICT_SET_FAILED, + "dht aggregate dict set failed"); + GF_FREE(meta_dst); + ret = -1; + goto out; + } + } + + if (value->len > sizeof(int64_t)) { + meta_src = data_to_bin(value); - DHT_STACK_UNWIND (lookup, frame, ret, local->op_errno, local->inode, - &local->stbuf, local->xattr, &local->postparent); + meta_dst->size = hton64(ntoh64(meta_dst->size) + + ntoh64(meta_src->size)); + meta_dst->file_count = hton64(ntoh64(meta_dst->file_count) + + ntoh64(meta_src->file_count)); + + if (value->len > (2 * sizeof(int64_t))) { + dst_dir_count = ntoh64(meta_dst->dir_count); + src_dir_count = ntoh64(meta_src->dir_count); + + if (src_dir_count > dst_dir_count) + meta_dst->dir_count = meta_src->dir_count; + } else { + meta_dst->dir_count = 0; + } + } else { + size = data_to_bin(value); + meta_dst->size = hton64(ntoh64(meta_dst->size) + ntoh64(*size)); + } - return 0; + ret = 0; +out: + return ret; } +static int +add_opt(char **optsp, const char *opt) +{ + char *newopts = NULL; + unsigned oldsize = 0; + unsigned newsize = 0; + + if (*optsp == NULL) + newopts = gf_strdup(opt); + else { + oldsize = strlen(*optsp); + newsize = oldsize + 1 + strlen(opt) + 1; + newopts = GF_REALLOC(*optsp, newsize); + if (newopts) + sprintf(newopts + oldsize, ",%s", opt); + } + if (newopts == NULL) { + gf_msg("dht", GF_LOG_WARNING, 0, DHT_MSG_NO_MEMORY, + "Error to add choices in buffer in add_opt"); + return -1; + } + *optsp = newopts; + return 0; +} -int -dht_lookup_dir_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno, - inode_t *inode, struct stat *stbuf, dict_t *xattr, - struct stat *postparent) -{ - dht_conf_t *conf = NULL; - dht_local_t *local = NULL; - int this_call_cnt = 0; - call_frame_t *prev = NULL; - dht_layout_t *layout = NULL; - int ret = 0; - int is_dir = 0; - - conf = this->private; - local = frame->local; - prev = cookie; - - layout = local->layout; - - LOCK (&frame->lock); - { - /* TODO: assert equal mode on stbuf->st_mode and - local->stbuf->st_mode - - else mkdir/chmod/chown and fix - */ - ret = dht_layout_merge (this, layout, prev->this, - op_ret, op_errno, xattr); - - if (op_ret == -1) { - local->op_errno = ENOENT; - gf_log (this->name, GF_LOG_DEBUG, - "lookup of %s on %s returned error (%s)", - local->loc.path, prev->this->name, - strerror (op_errno)); - - goto unlock; - } - - is_dir = check_is_dir (inode, stbuf, xattr); - if (!is_dir) { - gf_log (this->name, GF_LOG_DEBUG, - "lookup of %s on %s returned non dir 0%o", - local->loc.path, prev->this->name, - stbuf->st_mode); - local->need_selfheal = 1; - goto unlock; - } +/* Return Choice list from Split brain status */ +static char * +getChoices(const char *value) +{ + int i = 0; + char *ptr = NULL; + char *tok = NULL; + char *result = NULL; + char *newval = NULL; + + ptr = strstr(value, "Choices:"); + if (!ptr) { + result = ptr; + goto out; + } + + newval = gf_strdup(ptr); + if (!newval) { + result = newval; + goto out; + } + + tok = strtok(newval, ":"); + if (!tok) { + result = tok; + goto out; + } + + while (tok) { + i++; + if (i == 2) + break; + tok = strtok(NULL, ":"); + } + + result = gf_strdup(tok); + +out: + if (newval) + GF_FREE(newval); - local->op_ret = 0; - if (local->xattr == NULL) - local->xattr = dict_ref (xattr); - if (local->inode == NULL) - local->inode = inode_ref (inode); + return result; +} - dht_stat_merge (this, &local->stbuf, stbuf, prev->this); - dht_stat_merge (this, &local->postparent, postparent, - prev->this); +/* This function prepare a list of choices for key + (replica.split-brain-status) in case of metadata split brain + only on the basis of key-value passed to this function. + After prepare the list of choices it update the same key in dict + with this value to reflect the same in + replica.split-brain-status attr for file. - if (prev->this == local->hashed_subvol) { - local->st_ino = local->stbuf.st_ino; - local->st_dev = local->stbuf.st_dev; - } +*/ +static int +dht_aggregate_split_brain_xattr(dict_t *dst, char *key, data_t *value) +{ + int ret = 0; + char *oldvalue = NULL; + char *old_choice = NULL; + char *new_choice = NULL; + char *full_choice = NULL; + char *status = NULL; + + if (value == NULL) { + gf_msg("dht", GF_LOG_WARNING, 0, DHT_MSG_DATA_NULL, + "GF_AFR_SBRAIN_STATUS value is NULL"); + ret = -1; + goto out; + } + + ret = dict_get_str(dst, key, &oldvalue); + if (ret) + goto out; + + /* skip code that is irrelevant if !oldvalue */ + if (!oldvalue) + goto out; + + if (strstr(oldvalue, "not")) { + gf_msg_debug("dht", 0, "Need to update split-brain status in dict"); + ret = -1; + goto out; + } + if (strstr(oldvalue, "metadata-split-brain:yes") && + (strstr(oldvalue, "data-split-brain:no"))) { + if (strstr(value->data, "not")) { + gf_msg_debug("dht", 0, "No need to update split-brain status"); + ret = 0; + goto out; } -unlock: - UNLOCK (&frame->lock); + if (strstr(value->data, "yes") && + (strncmp(oldvalue, value->data, strlen(oldvalue)))) { + old_choice = getChoices(oldvalue); + if (!old_choice) { + gf_msg("dht", GF_LOG_WARNING, 0, DHT_MSG_NO_MEMORY, + "Error to get choices"); + ret = -1; + goto out; + } + ret = add_opt(&full_choice, old_choice); + if (ret) { + gf_msg("dht", GF_LOG_WARNING, 0, DHT_MSG_NO_MEMORY, + "Error to add choices"); + ret = -1; + goto out; + } - this_call_cnt = dht_frame_return (frame); + new_choice = getChoices(value->data); + if (!new_choice) { + gf_msg("dht", GF_LOG_WARNING, 0, DHT_MSG_NO_MEMORY, + "Error to get choices"); + ret = -1; + goto out; + } - if (is_last_call (this_call_cnt)) { - if (local->need_selfheal) { - local->need_selfheal = 0; - dht_lookup_everywhere (frame, this, &local->loc); - return 0; - } + ret = add_opt(&full_choice, new_choice); + if (ret) { + gf_msg("dht", GF_LOG_WARNING, 0, DHT_MSG_NO_MEMORY, + "Error to add choices "); + ret = -1; + goto out; + } + ret = gf_asprintf(&status, + "data-split-brain:%s " + "metadata-split-brain:%s Choices:%s", + "no", "yes", full_choice); + + if (-1 == ret) { + gf_msg("dht", GF_LOG_WARNING, 0, DHT_MSG_NO_MEMORY, + "Error to prepare status "); + goto out; + } + ret = dict_set_dynstr(dst, key, status); + if (ret) { + gf_msg("dht", GF_LOG_WARNING, 0, DHT_MSG_DICT_SET_FAILED, + "Failed to set full choice"); + } + } + } + +out: + if (old_choice) + GF_FREE(old_choice); + if (new_choice) + GF_FREE(new_choice); + if (full_choice) + GF_FREE(full_choice); + + return ret; +} - if (local->op_ret == 0) { - ret = dht_layout_normalize (this, &local->loc, layout); - - if (ret != 0) { - gf_log (this->name, GF_LOG_DEBUG, - "fixing assignment on %s", - local->loc.path); - goto selfheal; - } - - dht_layout_set (this, local->inode, layout); - - if (local->st_ino) { - local->stbuf.st_ino = local->st_ino; - local->stbuf.st_dev = local->st_dev; - } else { - gf_log (this->name, GF_LOG_DEBUG, - "could not find hashed subvol for %s", - local->loc.path); - } - - if (local->loc.parent) - local->postparent.st_ino = - local->loc.parent->ino; - } - - DHT_STACK_UNWIND (lookup, frame, local->op_ret, local->op_errno, - local->inode, &local->stbuf, local->xattr, - &local->postparent); - } - - return 0; +static int +dht_aggregate(dict_t *this, char *key, data_t *value, void *data) +{ + dict_t *dst = NULL; + int32_t ret = -1; + data_t *dict_data = NULL; + + dst = data; + + /* compare split brain xattr only */ + if (strcmp(key, GF_AFR_SBRAIN_STATUS) == 0) { + ret = dht_aggregate_split_brain_xattr(dst, key, value); + if (!ret) + goto out; + } else if (strcmp(key, QUOTA_SIZE_KEY) == 0) { + ret = dht_aggregate_quota_xattr(dst, key, value); + if (ret) { + gf_msg("dht", GF_LOG_WARNING, 0, + DHT_MSG_AGGREGATE_QUOTA_XATTR_FAILED, + "Failed to aggregate quota xattr"); + } + goto out; + } else if (fnmatch(GF_XATTR_STIME_PATTERN, key, FNM_NOESCAPE) == 0) { + ret = gf_get_min_stime(THIS, dst, key, value); + goto out; + } else { + /* compare user xattrs only */ + if (!strncmp(key, "user.", SLEN("user."))) { + ret = dict_lookup(dst, key, &dict_data); + if (!ret && dict_data && value) { + ret = is_data_equal(dict_data, value); + if (!ret) + gf_msg_debug("dht", 0, "xattr mismatch for %s", key); + } + } + } -selfheal: - ret = dht_selfheal_directory (frame, dht_lookup_selfheal_cbk, - &local->loc, layout); + ret = dict_set(dst, key, value); + if (ret) { + gf_msg("dht", GF_LOG_WARNING, 0, DHT_MSG_DICT_SET_FAILED, + "Failed to set dictionary value: key = %s", key); + } - return 0; +out: + return ret; } -int -dht_revalidate_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno, - inode_t *inode, struct stat *stbuf, dict_t *xattr, - struct stat *postparent) -{ - dht_local_t *local = NULL; - int this_call_cnt = 0; - call_frame_t *prev = NULL; - dht_layout_t *layout = NULL; - dht_conf_t *conf = NULL; - int ret = -1; - int is_dir = 0; - int is_linkfile = 0; +static void +dht_aggregate_xattr(dict_t *dst, dict_t *src) +{ + if ((dst == NULL) || (src == NULL)) { + goto out; + } - local = frame->local; - prev = cookie; - conf = this->private; - - LOCK (&frame->lock); - { - if (op_ret == -1) { - local->op_errno = op_errno; - - if ((op_errno != ENOTCONN) - && (op_errno != ENOENT) - && (op_errno != ESTALE)) { - gf_log (this->name, GF_LOG_DEBUG, - "subvolume %s returned -1 (%s)", - prev->this->name, strerror (op_errno)); - } - - if (op_errno == ESTALE) { - /* propogate the ESTALE to parent. - * setting local->layout_mismatch would send - * ESTALE to parent. */ - local->layout_mismatch = 1; - } + dict_foreach(src, dht_aggregate, dst); +out: + return; +} - goto unlock; - } - - if (S_IFMT & (stbuf->st_mode ^ local->inode->st_mode)) { - gf_log (this->name, GF_LOG_DEBUG, - "mismatching filetypes 0%o v/s 0%o for %s", - (stbuf->st_mode & S_IFMT), - (local->inode->st_mode & S_IFMT), - local->loc.path); - - local->op_ret = -1; - local->op_errno = EINVAL; - - goto unlock; - } - - layout = local->layout; - - is_dir = check_is_dir (inode, stbuf, xattr); - is_linkfile = check_is_linkfile (inode, stbuf, xattr); - - if (is_linkfile) { - gf_log (this->name, GF_LOG_DEBUG, - "linkfile found in revalidate for %s", - local->loc.path); - local->layout_mismatch = 1; - - goto unlock; - } - - if (is_dir) { - ret = dht_layout_dir_mismatch (this, layout, - prev->this, &local->loc, - xattr); - if (ret != 0) { - gf_log (this->name, GF_LOG_DEBUG, - "mismatching layouts for %s", - local->loc.path); - - local->layout_mismatch = 1; - - goto unlock; - } - } - - dht_stat_merge (this, &local->stbuf, stbuf, prev->this); - dht_stat_merge (this, &local->postparent, postparent, - prev->this); - - local->op_ret = 0; - local->stbuf.st_ino = local->st_ino; - local->stbuf.st_dev = local->loc.inode->generation; - - if (local->loc.parent) - local->postparent.st_ino = local->loc.parent->ino; - - if (!local->xattr) - local->xattr = dict_ref (xattr); - } +/* Code to save hashed subvol on inode ctx as a mds subvol + */ +int +dht_inode_ctx_mdsvol_set(inode_t *inode, xlator_t *this, xlator_t *mds_subvol) +{ + dht_inode_ctx_t *ctx = NULL; + int ret = -1; + uint64_t ctx_int = 0; + gf_boolean_t ctx_free = _gf_false; + + LOCK(&inode->lock); + { + ret = __inode_ctx_get(inode, this, &ctx_int); + if (ctx_int) { + ctx = (dht_inode_ctx_t *)(uintptr_t)ctx_int; + ctx->mds_subvol = mds_subvol; + } else { + ctx = GF_CALLOC(1, sizeof(*ctx), gf_dht_mt_inode_ctx_t); + if (!ctx) + goto unlock; + ctx->mds_subvol = mds_subvol; + ctx_free = _gf_true; + ctx_int = (long)ctx; + ret = __inode_ctx_set(inode, this, &ctx_int); + } + } unlock: - UNLOCK (&frame->lock); - - this_call_cnt = dht_frame_return (frame); - - if (is_last_call (this_call_cnt)) { - if (!S_ISDIR (local->stbuf.st_mode) - && (local->hashed_subvol != local->cached_subvol) - && (local->stbuf.st_nlink == 1) - && (conf->unhashed_sticky_bit)) { - local->stbuf.st_mode |= S_ISVTX; - } - - if (local->layout_mismatch) { - local->op_ret = -1; - local->op_errno = ESTALE; - } - - DHT_STACK_UNWIND (lookup, frame, local->op_ret, local->op_errno, - local->inode, &local->stbuf, local->xattr, - &local->postparent); - } - - return 0; + UNLOCK(&inode->lock); + if (ret && ctx_free) + GF_FREE(ctx); + return ret; } +/*Code to get mds subvol from inode ctx */ int -dht_lookup_linkfile_create_cbk (call_frame_t *frame, void *cookie, - xlator_t *this, - int32_t op_ret, int32_t op_errno, - inode_t *inode, struct stat *stbuf, - struct stat *preparent, struct stat *postparent) -{ - dht_local_t *local = NULL; - xlator_t *cached_subvol = NULL; - dht_conf_t *conf = NULL; - int ret = -1; - - local = frame->local; - cached_subvol = local->cached_subvol; - conf = this->private; - - ret = dht_layout_preset (this, local->cached_subvol, inode); - if (ret < 0) { - gf_log (this->name, GF_LOG_DEBUG, - "failed to set layout for subvolume %s", - cached_subvol ? cached_subvol->name : "<nil>"); - local->op_ret = -1; - local->op_errno = EINVAL; - goto unwind; +dht_inode_ctx_mdsvol_get(inode_t *inode, xlator_t *this, xlator_t **mdsvol) +{ + dht_inode_ctx_t *ctx = NULL; + int ret = -1; + + if (!mdsvol) + return ret; + + if (__is_root_gfid(inode->gfid)) { + (*mdsvol) = FIRST_CHILD(this); + return 0; + } + + ret = dht_inode_ctx_get(inode, this, &ctx); + + if (!ret && ctx) { + if (ctx->mds_subvol) { + *mdsvol = ctx->mds_subvol; + ret = 0; + } else { + ret = -1; } + } - local->op_ret = 0; - if ((local->stbuf.st_nlink == 1) - && (conf->unhashed_sticky_bit)) { - local->stbuf.st_mode |= S_ISVTX; - } + return ret; +} + +/* TODO: + - use volumename in xattr instead of "dht" + - use NS locks + - handle all cases in self heal layout reconstruction + - complete linkfile selfheal +*/ + +static int +dht_lookup_selfheal_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, dict_t *xdata) +{ + dht_local_t *local = NULL; + dht_layout_t *layout = NULL; + dht_conf_t *conf = NULL; + int ret = -1; - if (local->loc.parent) - local->postparent.st_ino = local->loc.parent->ino; + GF_VALIDATE_OR_GOTO("dht", frame, out); + GF_VALIDATE_OR_GOTO("dht", this, out); + GF_VALIDATE_OR_GOTO("dht", frame->local, out); -unwind: - DHT_STACK_UNWIND (lookup, frame, local->op_ret, local->op_errno, - local->inode, &local->stbuf, local->xattr, - &local->postparent); - return 0; + local = frame->local; + conf = this->private; + ret = op_ret; + + FRAME_SU_UNDO(frame, dht_local_t); + + if (ret == 0) { + layout = local->selfheal.layout; + ret = dht_layout_set(this, local->inode, layout); + } + + dht_inode_ctx_time_update(local->inode, this, &local->stbuf, 1); + if (local->loc.parent) { + dht_inode_ctx_time_update(local->loc.parent, this, &local->postparent, + 1); + } + + DHT_STRIP_PHASE1_FLAGS(&local->stbuf); + dht_set_fixed_dir_stat(&local->postparent); + /* Delete mds xattr at the time of STACK UNWIND */ + GF_REMOVE_INTERNAL_XATTR(conf->mds_xattr_key, local->xattr); + + DHT_STACK_UNWIND(lookup, frame, ret, local->op_errno, local->inode, + &local->stbuf, local->xattr, &local->postparent); + +out: + return ret; } +static int +dht_discover_complete(xlator_t *this, call_frame_t *discover_frame) +{ + dht_local_t *local = NULL; + dht_local_t *heal_local = NULL; + call_frame_t *main_frame = NULL; + call_frame_t *heal_frame = NULL; + int op_errno = 0; + int ret = -1; + dht_layout_t *layout = NULL; + dht_conf_t *conf = NULL; + uint32_t vol_commit_hash = 0; + xlator_t *source = NULL; + int heal_path = 0; + int error_while_marking_mds = 0; + int i = 0; + loc_t loc = {0}; + int8_t is_read_only = 0, layout_anomalies = 0; + char gfid_local[GF_UUID_BUF_SIZE] = {0}; + + local = discover_frame->local; + layout = local->layout; + conf = this->private; + gf_uuid_unparse(local->gfid, gfid_local); + + LOCK(&discover_frame->lock); + { + main_frame = local->main_frame; + local->main_frame = NULL; + } + UNLOCK(&discover_frame->lock); -int -dht_lookup_everywhere_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int32_t op_ret, int32_t op_errno, - inode_t *inode, struct stat *buf, dict_t *xattr, - struct stat *postparent) -{ - dht_conf_t *conf = NULL; - dht_local_t *local = NULL; - int this_call_cnt = 0; - call_frame_t *prev = NULL; - int is_linkfile = 0; - int is_dir = 0; - xlator_t *subvol = NULL; - loc_t *loc = NULL; - xlator_t *link_subvol = NULL; - xlator_t *hashed_subvol = NULL; - xlator_t *cached_subvol = NULL; - int ret = -1; - - conf = this->private; - - local = frame->local; - loc = &local->loc; - - prev = cookie; - subvol = prev->this; - - LOCK (&frame->lock); - { - if (op_ret == -1) { - if (op_errno != ENOENT) - local->op_errno = op_errno; - goto unlock; - } - - is_linkfile = check_is_linkfile (inode, buf, xattr); - is_dir = check_is_dir (inode, buf, xattr); - - if (is_linkfile) { - link_subvol = dht_linkfile_subvol (this, inode, buf, - xattr); - gf_log (this->name, GF_LOG_DEBUG, - "found on %s linkfile %s (-> %s)", - subvol->name, loc->path, - link_subvol ? link_subvol->name : "''"); - goto unlock; - } - - if (is_dir) { - local->dir_count++; - - gf_log (this->name, GF_LOG_DEBUG, - "found on %s directory %s", - subvol->name, loc->path); - } else { - local->file_count++; - - if (!local->cached_subvol) { - /* found one file */ - dht_stat_merge (this, &local->stbuf, buf, - subvol); - local->xattr = dict_ref (xattr); - local->cached_subvol = subvol; - gf_log (this->name, GF_LOG_DEBUG, - "found on %s file %s", - subvol->name, loc->path); - - dht_stat_merge (this, &local->postparent, - postparent, subvol); - } else { - gf_log (this->name, GF_LOG_DEBUG, - "multiple subvolumes (%s and %s) have " - "file %s", local->cached_subvol->name, - subvol->name, local->loc.path); - } - } - } -unlock: - UNLOCK (&frame->lock); - - if (is_linkfile) { - gf_log (this->name, GF_LOG_DEBUG, - "deleting stale linkfile %s on %s", - loc->path, subvol->name); - dht_linkfile_unlink (frame, this, subvol, loc); - } - - this_call_cnt = dht_frame_return (frame); - if (is_last_call (this_call_cnt)) { - hashed_subvol = local->hashed_subvol; - cached_subvol = local->cached_subvol; - - if (local->file_count && local->dir_count) { - gf_log (this->name, GF_LOG_ERROR, - "path %s exists as a file on one subvolume " - "and directory on another. " - "Please fix it manually", - loc->path); - DHT_STACK_UNWIND (lookup, frame, -1, EIO, NULL, NULL, NULL, - NULL); - return 0; - } + if (!main_frame) + return 0; - if (local->dir_count) { - dht_lookup_directory (frame, this, &local->loc); - return 0; - } + /* Code to update all extended attributed from + subvol to local->xattr on that internal xattr has found + */ + if (conf->subvolume_cnt == 1) + local->need_xattr_heal = 0; + if (local->need_xattr_heal && (local->mds_xattr)) { + dht_dir_set_heal_xattr(this, local, local->xattr, local->mds_xattr, + NULL, NULL); + dict_unref(local->mds_xattr); + local->mds_xattr = NULL; + } + + ret = dict_get_int8(local->xattr_req, QUOTA_READ_ONLY_KEY, &is_read_only); + if (ret < 0) + gf_msg_debug(this->name, 0, "key = %s not present in dict", + QUOTA_READ_ONLY_KEY); + + if (local->file_count && local->dir_count) { + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_FILE_TYPE_MISMATCH, + "path %s exists as a file on one subvolume " + "and directory on another. " + "Please fix it manually", + local->loc.path); + op_errno = EIO; + goto out; + } + + if (local->cached_subvol) { + ret = dht_layout_preset(this, local->cached_subvol, local->inode); + if (ret < 0) { + gf_msg(this->name, GF_LOG_WARNING, 0, DHT_MSG_LAYOUT_SET_FAILED, + "failed to set layout for subvolume %s", + local->cached_subvol ? local->cached_subvol->name : "<nil>"); + op_errno = EINVAL; + goto out; + } + } else { + ret = dht_layout_normalize(this, &local->loc, layout); + if ((ret < 0) || ((ret > 0) && (local->op_ret != 0))) { + /* either the layout is incorrect or the directory is + * not found even in one subvolume. + */ + gf_msg_debug(this->name, 0, + "normalizing failed on %s " + "(overlaps/holes present: %s, " + "ENOENT errors: %d)", + local->loc.path, (ret < 0) ? "yes" : "no", + (ret > 0) ? ret : 0); + layout_anomalies = 1; + } else if (local->inode) { + dht_layout_set(this, local->inode, layout); + } + } - if (!cached_subvol) { - DHT_STACK_UNWIND (lookup, frame, -1, ENOENT, NULL, NULL, NULL, - NULL); - return 0; - } - - if (!hashed_subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "cannot create linkfile file for %s on %s: " - "hashed subvolume cannot be found.", - loc->path, cached_subvol->name); - - local->op_ret = 0; - local->op_errno = 0; - - ret = dht_layout_preset (frame->this, cached_subvol, - local->inode); - if (ret < 0) { - gf_log (this->name, GF_LOG_DEBUG, - "failed to set layout for subvol %s", - cached_subvol ? cached_subvol->name : - "<nil>"); - local->op_ret = -1; - local->op_errno = EINVAL; - } + if (!conf->vch_forced) { + ret = dict_get_uint32(local->xattr, conf->commithash_xattr_name, + &vol_commit_hash); + if (ret == 0) { + conf->vol_commit_hash = vol_commit_hash; + } + } + + if (IA_ISDIR(local->stbuf.ia_type) && !is_read_only) { + for (i = 0; i < layout->cnt; i++) { + if (!source && !layout->list[i].err) + source = layout->list[i].xlator; + if (layout->list[i].err == ENOENT || + layout->list[i].err == ESTALE) { + heal_path = 1; + } + + if (source && heal_path) + break; + } + } + + if (IA_ISDIR(local->stbuf.ia_type)) { + /* Call function to save hashed subvol on inode ctx if + internal mds xattr is not present and all subvols are up + */ + if (!local->op_ret && !__is_root_gfid(local->stbuf.ia_gfid)) + (void)dht_common_mark_mdsxattr(discover_frame, + &error_while_marking_mds, 1); + + if (local->need_xattr_heal && !heal_path) { + local->need_xattr_heal = 0; + ret = dht_dir_xattr_heal(this, local, &op_errno); + if (ret) { + gf_msg(this->name, GF_LOG_ERROR, op_errno, + DHT_MSG_DIR_XATTR_HEAL_FAILED, + "xattr heal failed for " + "directory gfid is %s ", + gfid_local); + } + } + } - if (local->loc.parent) - local->postparent.st_ino = - local->loc.parent->ino; + if (source && (heal_path || layout_anomalies || error_while_marking_mds)) { + gf_uuid_copy(loc.gfid, local->gfid); + if (gf_uuid_is_null(loc.gfid)) { + goto done; + } - DHT_STACK_UNWIND (lookup, frame, local->op_ret, - local->op_errno, local->inode, - &local->stbuf, local->xattr, - &local->postparent); - return 0; - } + if (local->inode) + loc.inode = inode_ref(local->inode); + else + goto done; + + heal_frame = create_frame(this, this->ctx->pool); + if (heal_frame) { + heal_local = dht_local_init(heal_frame, &loc, NULL, 0); + if (!heal_local) + goto cleanup; + + gf_uuid_copy(heal_local->gfid, local->gfid); + heal_frame->cookie = source; + heal_local->xattr = dict_ref(local->xattr); + heal_local->stbuf = local->stbuf; + heal_local->postparent = local->postparent; + heal_local->inode = inode_ref(loc.inode); + heal_local->main_frame = main_frame; + FRAME_SU_DO(heal_frame, dht_local_t); + ret = synctask_new(this->ctx->env, dht_heal_full_path, + dht_heal_full_path_done, heal_frame, heal_frame); + if (!ret) { + loc_wipe(&loc); + return 0; + } + /* + * Failed to spawn the synctask. Returning + * with out doing heal. + */ + cleanup: + loc_wipe(&loc); + DHT_STACK_DESTROY(heal_frame); + } + } +done: + dht_set_fixed_dir_stat(&local->postparent); + /* Delete mds xattr at the time of STACK UNWIND */ + if (local->xattr) + GF_REMOVE_INTERNAL_XATTR(conf->mds_xattr_key, local->xattr); + + DHT_STACK_UNWIND(lookup, main_frame, local->op_ret, local->op_errno, + local->inode, &local->stbuf, local->xattr, + &local->postparent); + return 0; - gf_log (this->name, GF_LOG_DEBUG, - "linking file %s existing on %s to %s (hash)", - loc->path, cached_subvol->name, - hashed_subvol->name); - - dht_linkfile_create (frame, - dht_lookup_linkfile_create_cbk, - cached_subvol, hashed_subvol, loc); - } +out: + DHT_STACK_UNWIND(lookup, main_frame, -1, op_errno, NULL, NULL, NULL, NULL); - return 0; + return ret; } +static int +dht_common_mark_mdsxattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, dict_t *xdata) +{ + dht_local_t *local = NULL; + xlator_t *prev = cookie; + int ret = -1; + dht_conf_t *conf = 0; + dht_layout_t *layout = NULL; + int32_t mds_heal_fresh_lookup = 0; + + GF_VALIDATE_OR_GOTO(this->name, frame, out); + GF_VALIDATE_OR_GOTO(this->name, frame->local, out); + + local = frame->local; + conf = this->private; + layout = local->selfheal.layout; + mds_heal_fresh_lookup = local->mds_heal_fresh_lookup; + + if (op_ret) { + gf_msg_debug(this->name, op_ret, + "Failed to set %s on the MDS %s for path %s. ", + conf->mds_xattr_key, prev->name, local->loc.path); + } else { + /* Save mds subvol on inode ctx */ + ret = dht_inode_ctx_mdsvol_set(local->inode, this, prev); + if (ret) { + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_SET_INODE_CTX_FAILED, + "Failed to set mds subvol on inode ctx" + " %s for %s ", + prev->name, local->loc.path); + } + } + if (!local->mds_heal_fresh_lookup && layout) { + dht_selfheal_dir_setattr(frame, &local->loc, &local->stbuf, 0xffffffff, + layout); + } +out: + if (mds_heal_fresh_lookup) + DHT_STACK_DESTROY(frame); + return 0; +} -int -dht_lookup_everywhere (call_frame_t *frame, xlator_t *this, loc_t *loc) +static xlator_t * +dht_inode_get_hashed_subvol(inode_t *inode, xlator_t *this, loc_t *loc) { - dht_conf_t *conf = NULL; - dht_local_t *local = NULL; - int i = 0; - int call_cnt = 0; + char *path = NULL; + loc_t populate_loc = { + 0, + }; + char *name = NULL; + xlator_t *hash_subvol = NULL; + + if (!inode) + return hash_subvol; + + if (loc && loc->parent && loc->path) { + if (!loc->name) { + name = strrchr(loc->path, '/'); + if (name) { + loc->name = name + 1; + } else { + goto out; + } + } + hash_subvol = dht_subvol_get_hashed(this, loc); + goto out; + } - conf = this->private; - local = frame->local; + if (!gf_uuid_is_null(inode->gfid)) { + populate_loc.inode = inode_ref(inode); + populate_loc.parent = inode_parent(populate_loc.inode, NULL, NULL); + inode_path(populate_loc.inode, NULL, &path); - call_cnt = conf->subvolume_cnt; - local->call_cnt = call_cnt; + if (!path) + goto out; - if (!local->inode) - local->inode = inode_ref (loc->inode); + populate_loc.path = path; + if (!populate_loc.name && populate_loc.path) { + name = strrchr(populate_loc.path, '/'); + if (name) { + populate_loc.name = name + 1; - for (i = 0; i < call_cnt; i++) { - STACK_WIND (frame, dht_lookup_everywhere_cbk, - conf->subvolumes[i], - conf->subvolumes[i]->fops->lookup, - loc, local->xattr_req); - } + } else { + goto out; + } + } + hash_subvol = dht_subvol_get_hashed(this, &populate_loc); + } +out: + if (populate_loc.inode) + loc_wipe(&populate_loc); + return hash_subvol; +} - return 0; +/* Common function call by revalidate/selfheal code path to populate + internal xattr if it is not present, mark_during_fresh_lookup value + determines either function is call by revalidate_cbk(discover_complete) + or call by selfheal code path while fresh lookup. + Here we do wind a call serially in case of fresh lookup and + for other lookup code path we do wind a call parallel.The reason + to wind a call serially is at the time of fresh lookup directory is not + discovered and at the time of revalidate_lookup directory is + already discovered. So, revalidate codepath can race with setxattr + codepath and can get into spurious heals because of an ongoing setxattr. + This can slow down revalidates, if healing happens in foreground. + However, if healing happens in background, there is no direct performance + penalty. +*/ +int +dht_common_mark_mdsxattr(call_frame_t *frame, int *errst, + int mark_during_fresh_lookup) +{ + dht_local_t *local = NULL; + xlator_t *this = NULL; + xlator_t *hashed_subvol = NULL; + int ret = 0; + int i = 0; + dict_t *xattrs = NULL; + char gfid_local[GF_UUID_BUF_SIZE] = { + 0, + }; + int32_t zero[1] = {0}; + dht_conf_t *conf = 0; + dht_layout_t *layout = NULL; + dht_local_t *copy_local = NULL; + call_frame_t *xattr_frame = NULL; + gf_boolean_t vol_down = _gf_false; + + GF_VALIDATE_OR_GOTO("dht", frame, out); + this = frame->this; + GF_VALIDATE_OR_GOTO("dht", this, out); + GF_VALIDATE_OR_GOTO(this->name, frame->local, out); + GF_VALIDATE_OR_GOTO(this->name, this->private, out); + + local = frame->local; + conf = this->private; + layout = local->selfheal.layout; + local->mds_heal_fresh_lookup = mark_during_fresh_lookup; + + gf_uuid_unparse(local->gfid, gfid_local); + + /* Code to update hashed subvol consider as a mds subvol + and wind a setxattr call on hashed subvol to update + internal xattr + */ + if (!local->xattr || !dict_get(local->xattr, conf->mds_xattr_key)) { + /* It means no internal MDS xattr has been set yet + */ + /* Check the status of all subvol are up while call + this function call by lookup code path + */ + if (mark_during_fresh_lookup) { + for (i = 0; i < conf->subvolume_cnt; i++) { + if (!conf->subvolume_status[i]) { + vol_down = _gf_true; + break; + } + } + if (vol_down) { + gf_msg_debug(this->name, 0, + "subvol %s is down. Unable to " + " save mds subvol on inode for " + " path %s gfid is %s ", + conf->subvolumes[i]->name, local->loc.path, + gfid_local); + goto out; + } + } + + /* Calculate hashed subvol based on inode and parent node + */ + hashed_subvol = dht_inode_get_hashed_subvol(local->inode, this, + &local->loc); + if (!hashed_subvol) { + gf_msg(this->name, GF_LOG_DEBUG, 0, + DHT_MSG_HASHED_SUBVOL_GET_FAILED, + "Failed to get hashed subvol for path %s" + "gfid is %s ", + local->loc.path, gfid_local); + if (errst) + (*errst) = 1; + ret = -1; + goto out; + } + xattrs = dict_new(); + if (!xattrs) { + gf_msg(this->name, GF_LOG_ERROR, ENOMEM, DHT_MSG_NO_MEMORY, + "dict_new failed"); + ret = -1; + goto out; + } + /* Add internal MDS xattr on disk for hashed subvol + */ + ret = dht_dict_set_array(xattrs, conf->mds_xattr_key, zero, 1); + if (ret) { + gf_msg(this->name, GF_LOG_WARNING, ENOMEM, DHT_MSG_DICT_SET_FAILED, + "Failed to set dictionary" + " value:key = %s for " + "path %s", + conf->mds_xattr_key, local->loc.path); + ret = -1; + goto out; + } + /* Create a new frame to wind a call only while + this function call by revalidate_cbk code path + To wind a call parallel need to create a new frame + */ + if (mark_during_fresh_lookup) { + xattr_frame = create_frame(this, this->ctx->pool); + if (!xattr_frame) { + ret = -1; + goto out; + } + copy_local = dht_local_init(xattr_frame, &(local->loc), NULL, 0); + if (!copy_local) { + ret = -1; + DHT_STACK_DESTROY(xattr_frame); + goto out; + } + copy_local->stbuf = local->stbuf; + copy_local->mds_heal_fresh_lookup = mark_during_fresh_lookup; + if (!copy_local->inode) + copy_local->inode = inode_ref(local->inode); + gf_uuid_copy(copy_local->loc.gfid, local->gfid); + FRAME_SU_DO(xattr_frame, dht_local_t); + STACK_WIND_COOKIE(xattr_frame, dht_common_mark_mdsxattr_cbk, + hashed_subvol, hashed_subvol, + hashed_subvol->fops->setxattr, &local->loc, + xattrs, 0, NULL); + } else { + STACK_WIND_COOKIE(frame, dht_common_mark_mdsxattr_cbk, + (void *)hashed_subvol, hashed_subvol, + hashed_subvol->fops->setxattr, &local->loc, + xattrs, 0, NULL); + } + } else { + gf_msg_debug(this->name, 0, + "internal xattr %s is present on subvol" + "on path %s gfid is %s ", + conf->mds_xattr_key, local->loc.path, gfid_local); + if (!mark_during_fresh_lookup) + dht_selfheal_dir_setattr(frame, &local->loc, &local->stbuf, + 0xffffffff, layout); + } + +out: + if (xattrs) + dict_unref(xattrs); + return ret; } +/* Get the value of key from dict in the bytewise and save in array after + convert from network byte order to host byte order +*/ +static int32_t +dht_dict_get_array(dict_t *dict, char *key, int32_t value[], int32_t size, + int *errst) +{ + void *ptr = NULL; + int32_t len = -1; + int32_t vindex = -1; + int32_t err = -1; + int ret = 0; + + if (dict == NULL) { + (*errst) = -1; + return -EINVAL; + } + err = dict_get_ptr_and_len(dict, key, &ptr, &len); + if (err != 0) { + (*errst) = -1; + return err; + } + + if (len != (size * sizeof(int32_t))) { + (*errst) = -1; + return -EINVAL; + } + + for (vindex = 0; vindex < size; vindex++) { + value[vindex] = ntoh32(*((int32_t *)ptr + vindex)); + if (value[vindex] < 0) + ret = -1; + } + + return ret; +} -int -dht_lookup_linkfile_cbk (call_frame_t *frame, void *cookie, - xlator_t *this, int op_ret, int op_errno, - inode_t *inode, struct stat *stbuf, dict_t *xattr, - struct stat *postparent) -{ - call_frame_t *prev = NULL; - dht_local_t *local = NULL; - xlator_t *subvol = NULL; - loc_t *loc = NULL; - dht_conf_t *conf = NULL; - int ret = 0; - - prev = cookie; - subvol = prev->this; - conf = this->private; - local = frame->local; - loc = &local->loc; +static int +dht_discover_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, + int op_errno, inode_t *inode, struct iatt *stbuf, + dict_t *xattr, struct iatt *postparent) +{ + dht_local_t *local = NULL; + int this_call_cnt = 0; + xlator_t *prev = NULL; + dht_layout_t *layout = NULL; + int ret = -1; + int is_dir = 0; + int32_t check_mds = 0; + int is_linkfile = 0; + int attempt_unwind = 0; + dht_conf_t *conf = 0; + char gfid_local[GF_UUID_BUF_SIZE] = {0}; + char gfid_node[GF_UUID_BUF_SIZE] = {0}; + int32_t mds_xattr_val[1] = {0}; + int errst = 0; + + GF_VALIDATE_OR_GOTO("dht", frame, out); + GF_VALIDATE_OR_GOTO("dht", this, out); + GF_VALIDATE_OR_GOTO("dht", frame->local, out); + GF_VALIDATE_OR_GOTO("dht", this->private, out); + GF_VALIDATE_OR_GOTO("dht", cookie, out); + + local = frame->local; + prev = cookie; + conf = this->private; + + layout = local->layout; + + /* Check if the gfid is different for file from other node */ + if (!op_ret && gf_uuid_compare(local->gfid, stbuf->ia_gfid)) { + gf_uuid_unparse(stbuf->ia_gfid, gfid_node); + gf_uuid_unparse(local->gfid, gfid_local); + + gf_msg(this->name, GF_LOG_WARNING, 0, DHT_MSG_GFID_MISMATCH, + "%s: gfid different on %s, gfid local = %s" + "gfid other = %s", + local->loc.path, prev->name, gfid_local, gfid_node); + } + + LOCK(&frame->lock); + { + /* TODO: assert equal mode on stbuf->st_mode and + local->stbuf->st_mode + + else mkdir/chmod/chown and fix + */ + + ret = dht_layout_merge(this, layout, prev, op_ret, op_errno, xattr); + if (ret) + gf_msg(this->name, GF_LOG_WARNING, 0, DHT_MSG_LAYOUT_MERGE_FAILED, + "%s: failed to merge layouts for subvol %s", local->loc.path, + prev->name); if (op_ret == -1) { - gf_log (this->name, GF_LOG_DEBUG, - "lookup of %s on %s (following linkfile) failed (%s)", - local->loc.path, subvol->name, strerror (op_errno)); - goto err; - } + local->op_errno = op_errno; + gf_msg_debug(this->name, op_errno, + "lookup of %s on %s returned error", local->loc.path, + prev->name); - if (check_is_dir (inode, stbuf, xattr)) { - gf_log (this->name, GF_LOG_DEBUG, - "lookup of %s on %s (following linkfile) reached dir", - local->loc.path, subvol->name); - goto err; + goto unlock; } - if (check_is_linkfile (inode, stbuf, xattr)) { - gf_log (this->name, GF_LOG_DEBUG, - "lookup of %s on %s (following linkfile) reached link", - local->loc.path, subvol->name); - goto err; + is_linkfile = check_is_linkfile(inode, stbuf, xattr, + conf->link_xattr_name); + is_dir = check_is_dir(inode, stbuf, xattr); + + if (is_dir) { + local->dir_count++; + } else { + local->file_count++; + + if (!is_linkfile && !local->cached_subvol) { + /* real file */ + /* Ok, we somehow managed to find a file on + * more than one subvol. ignore this or we + * will end up overwriting information while a + * a thread is potentially unwinding from + * dht_discover_complete + */ + local->cached_subvol = prev; + attempt_unwind = 1; + } else { + goto unlock; + } + } + + local->op_ret = 0; + + if (local->xattr == NULL) { + local->xattr = dict_ref(xattr); + } else { + /* Don't aggregate for files. See BZ#1484709 */ + if (is_dir) + dht_aggregate_xattr(local->xattr, xattr); } - if ((stbuf->st_nlink == 1) - && (conf->unhashed_sticky_bit)) { - stbuf->st_mode |= S_ISVTX; - } - dht_itransform (this, prev->this, stbuf->st_ino, &stbuf->st_ino); - if (local->loc.parent) - postparent->st_ino = local->loc.parent->ino; - - ret = dht_layout_preset (this, prev->this, inode); - if (ret < 0) { - gf_log (this->name, GF_LOG_DEBUG, - "failed to set layout for subvolume %s", - prev->this->name); - op_ret = -1; - op_errno = EINVAL; - goto out; - } + if (local->inode == NULL) + local->inode = inode_ref(inode); + dht_iatt_merge(this, &local->stbuf, stbuf); + dht_iatt_merge(this, &local->postparent, postparent); + + if (!dict_get(xattr, conf->mds_xattr_key)) { + goto unlock; + } else { + gf_msg_debug(this->name, 0, + "internal xattr %s is present on subvol" + "on path %s gfid is %s ", + conf->mds_xattr_key, local->loc.path, gfid_local); + } + check_mds = dht_dict_get_array(xattr, conf->mds_xattr_key, + mds_xattr_val, 1, &errst); + /* save mds subvol on inode ctx */ + ret = dht_inode_ctx_mdsvol_set(local->inode, this, prev); + if (ret) { + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_SET_INODE_CTX_FAILED, + "Failed to set hashed subvol for %s vol is %s", + local->loc.path, prev->name); + } + + if ((check_mds < 0) && !errst) { + local->mds_xattr = dict_ref(xattr); + gf_msg_debug(this->name, 0, + "Value of %s is not zero on mds subvol" + "so xattr needs to be healed on non mds" + " path is %s and vol name is %s " + " gfid is %s", + conf->mds_xattr_key, local->loc.path, prev->name, + gfid_local); + local->need_xattr_heal = 1; + local->mds_subvol = prev; + } + } +unlock: + UNLOCK(&frame->lock); out: - DHT_STACK_UNWIND (lookup, frame, op_ret, op_errno, inode, stbuf, xattr, - postparent); + /* Make sure, the thread executing dht_discover_complete is the one + * which calls STACK_DESTROY (frame). In the case of "attempt_unwind", + * this makes sure that the thread don't call dht_frame_return, till + * call to dht_discover_complete is done. + */ + if (attempt_unwind) { + dht_discover_complete(this, frame); + } - return 0; + this_call_cnt = dht_frame_return(frame); + + if (is_last_call(this_call_cnt) && !attempt_unwind) { + dht_discover_complete(this, frame); + } + + if (is_last_call(this_call_cnt)) + DHT_STACK_DESTROY(frame); + + return 0; +} +static int +dht_set_file_xattr_req(xlator_t *this, loc_t *loc, dict_t *xattr_req) +{ + int ret = -EINVAL; + dht_conf_t *conf = NULL; + + conf = this->private; + if (!conf) { + goto err; + } + + if (!xattr_req) { + goto err; + } + + /* Used to check whether this is a linkto file. + */ + ret = dict_set_uint32(xattr_req, conf->link_xattr_name, 256); + if (ret < 0) { + gf_msg(this->name, GF_LOG_WARNING, ENOMEM, DHT_MSG_DICT_SET_FAILED, + "Failed to set dictionary value:key = %s for " + "path %s", + conf->link_xattr_name, loc->path); + goto err; + } + + /* This is used to make sure we don't unlink linkto files + * which are the target of an ongoing file migration. + */ + ret = dict_set_uint32(xattr_req, GLUSTERFS_OPEN_FD_COUNT, 4); + if (ret) { + gf_msg(this->name, GF_LOG_WARNING, ENOMEM, DHT_MSG_DICT_SET_FAILED, + "Failed to set dictionary value:key = %s for " + "path %s", + GLUSTERFS_OPEN_FD_COUNT, loc->path); + goto err; + } + + ret = 0; err: - dht_lookup_everywhere (frame, this, loc); + return ret; +} - return 0; +/* This is a gfid based nameless lookup. Without a name, the hashed subvol + * cannot be calculated so a lookup is sent to all subvols. + */ +static int +dht_do_discover(call_frame_t *frame, xlator_t *this, loc_t *loc) +{ + int ret; + dht_local_t *local = NULL; + dht_conf_t *conf = NULL; + int call_cnt = 0; + int op_errno = EINVAL; + int i = 0; + call_frame_t *discover_frame = NULL; + + conf = this->private; + local = frame->local; + + /* As we do not know if this is a file or directory, request + * both file and directory xattrs + */ + ret = dht_set_file_xattr_req(this, loc, local->xattr_req); + if (ret) { + goto err; + } + + ret = dht_set_dir_xattr_req(this, loc, local->xattr_req); + if (ret) { + goto err; + } + + if (loc_is_root(loc)) { + /* Request the DHT commit hash xattr (trusted.glusterfs.dht.commithash) + * set on the brick root. + */ + ret = dict_set_uint32(local->xattr_req, conf->commithash_xattr_name, + sizeof(uint32_t)); + } + + call_cnt = conf->subvolume_cnt; + local->call_cnt = call_cnt; + + local->layout = dht_layout_new(this, conf->subvolume_cnt); + + if (!local->layout) { + op_errno = ENOMEM; + goto err; + } + + gf_uuid_copy(local->gfid, loc->gfid); + + discover_frame = copy_frame(frame); + if (!discover_frame) { + op_errno = ENOMEM; + goto err; + } + + discover_frame->local = local; + frame->local = NULL; + local->main_frame = frame; + + for (i = 0; i < call_cnt; i++) { + STACK_WIND_COOKIE(discover_frame, dht_discover_cbk, conf->subvolumes[i], + conf->subvolumes[i], + conf->subvolumes[i]->fops->lookup, &local->loc, + local->xattr_req); + } + + return 0; + +err: + DHT_STACK_UNWIND(lookup, frame, -1, op_errno, NULL, NULL, NULL, NULL); + + return 0; +} + +/* Code to call syntask to heal custom xattr from hashed subvol + to non hashed subvol +*/ +int +dht_dir_xattr_heal(xlator_t *this, dht_local_t *local, int *op_errno) +{ + dht_local_t *copy_local = NULL; + call_frame_t *copy = NULL; + int ret = -1; + char gfid_local[GF_UUID_BUF_SIZE] = {0}; + + if (gf_uuid_is_null(local->gfid)) { + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_DIR_XATTR_HEAL_FAILED, + "No gfid exists for path %s " + "so healing xattr is not possible", + local->loc.path); + *op_errno = EIO; + goto out; + } + + gf_uuid_unparse(local->gfid, gfid_local); + copy = create_frame(this, this->ctx->pool); + if (copy) { + copy_local = dht_local_init(copy, &(local->loc), NULL, 0); + if (!copy_local) { + gf_msg(this->name, GF_LOG_ERROR, ENOMEM, + DHT_MSG_DIR_XATTR_HEAL_FAILED, + "Memory allocation failed " + "for path %s gfid %s ", + local->loc.path, gfid_local); + *op_errno = ENOMEM; + DHT_STACK_DESTROY(copy); + } else { + copy_local->stbuf = local->stbuf; + gf_uuid_copy(copy_local->loc.gfid, local->gfid); + copy_local->mds_subvol = local->mds_subvol; + FRAME_SU_DO(copy, dht_local_t); + ret = synctask_new(this->ctx->env, dht_dir_heal_xattrs, + dht_dir_heal_xattrs_done, copy, copy); + if (ret) { + gf_msg(this->name, GF_LOG_ERROR, ENOMEM, + DHT_MSG_DIR_XATTR_HEAL_FAILED, + "Synctask creation failed to heal xattr " + "for path %s gfid %s ", + local->loc.path, gfid_local); + *op_errno = ENOMEM; + DHT_STACK_DESTROY(copy); + } + } + } +out: + return ret; } +static int +dht_needs_selfheal(call_frame_t *frame, xlator_t *this) +{ + dht_local_t *local = NULL; + dht_layout_t *layout = NULL; + int needs_selfheal = 0; + int ret = 0; + + local = frame->local; + layout = local->layout; + + if (local->need_attrheal || local->need_xattr_heal || + local->need_selfheal) { + needs_selfheal = 1; + } + + ret = dht_layout_normalize(this, &local->loc, layout); + + if (ret != 0) { + gf_msg_debug(this->name, 0, "fixing assignment on %s", local->loc.path); + needs_selfheal = 1; + } + return needs_selfheal; +} + +static int +is_permission_different(ia_prot_t *prot1, ia_prot_t *prot2) +{ + if ((prot1->owner.read != prot2->owner.read) || + (prot1->owner.write != prot2->owner.write) || + (prot1->owner.exec != prot2->owner.exec) || + (prot1->group.read != prot2->group.read) || + (prot1->group.write != prot2->group.write) || + (prot1->group.exec != prot2->group.exec) || + (prot1->other.read != prot2->other.read) || + (prot1->other.write != prot2->other.write) || + (prot1->other.exec != prot2->other.exec) || + (prot1->suid != prot2->suid) || (prot1->sgid != prot2->sgid) || + (prot1->sticky != prot2->sticky)) { + return 1; + } else { + return 0; + } +} int -dht_lookup_directory (call_frame_t *frame, xlator_t *this, loc_t *loc) +dht_lookup_dir_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, inode_t *inode, struct iatt *stbuf, + dict_t *xattr, struct iatt *postparent) { - int call_cnt = 0; - int i = 0; - dht_conf_t *conf = NULL; - dht_local_t *local = NULL; + dht_local_t *local = NULL; + dht_conf_t *conf = NULL; + int this_call_cnt = 0; + xlator_t *prev = NULL; + dht_layout_t *layout = NULL; + int ret = -1; + int is_dir = 0; + int32_t check_mds = 0; + int errst = 0; + char gfid_local[GF_UUID_BUF_SIZE] = {0}; + char gfid_node[GF_UUID_BUF_SIZE] = {0}; + int32_t mds_xattr_val[1] = {0}; + + GF_VALIDATE_OR_GOTO("dht", frame, out); + GF_VALIDATE_OR_GOTO("dht", this, out); + GF_VALIDATE_OR_GOTO("dht", frame->local, out); + GF_VALIDATE_OR_GOTO("dht", this->private, out); + GF_VALIDATE_OR_GOTO("dht", cookie, out); + + local = frame->local; + prev = cookie; + conf = this->private; + + layout = local->layout; + gf_msg_debug(this->name, op_errno, + "%s: lookup on %s returned with op_ret = %d, op_errno = %d", + local->loc.path, prev->name, op_ret, op_errno); + + /* The first successful lookup*/ + if (!op_ret && gf_uuid_is_null(local->gfid)) { + memcpy(local->gfid, stbuf->ia_gfid, 16); + } + if (!gf_uuid_is_null(local->gfid)) { + gf_uuid_unparse(local->gfid, gfid_local); + } + + /* Check if the gfid is different for file from other node */ + if (!op_ret && gf_uuid_compare(local->gfid, stbuf->ia_gfid)) { + gf_uuid_unparse(stbuf->ia_gfid, gfid_node); + + gf_msg(this->name, GF_LOG_WARNING, 0, DHT_MSG_GFID_MISMATCH, + "%s: gfid different on %s." + " gfid local = %s, gfid subvol = %s", + local->loc.path, prev->name, gfid_local, gfid_node); + } + + LOCK(&frame->lock); + { + /* TODO: assert equal mode on stbuf->st_mode and + local->stbuf->st_mode + else mkdir/chmod/chown and fix + */ + ret = dht_layout_merge(this, layout, prev, op_ret, op_errno, xattr); - conf = this->private; - local = frame->local; + if (op_ret == -1) { + local->op_errno = op_errno; - call_cnt = conf->subvolume_cnt; - local->call_cnt = call_cnt; - - local->layout = dht_layout_new (this, conf->subvolume_cnt); - if (!local->layout) { - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - DHT_STACK_UNWIND (lookup, frame, -1, ENOMEM, NULL, NULL, NULL, NULL); - return 0; + /* The GFID is missing on this subvol. Force a heal. */ + if (op_errno == ENODATA) { + local->need_lookup_everywhere = 1; + } + goto unlock; } - - for (i = 0; i < call_cnt; i++) { - STACK_WIND (frame, dht_lookup_dir_cbk, - conf->subvolumes[i], - conf->subvolumes[i]->fops->lookup, - &local->loc, local->xattr_req); + + is_dir = check_is_dir(inode, stbuf, xattr); + if (!is_dir) { + gf_msg_debug(this->name, 0, + "%s: lookup on %s returned non dir 0%o" + "calling lookup_everywhere", + local->loc.path, prev->name, stbuf->ia_type); + + local->need_lookup_everywhere = 1; + goto unlock; } - return 0; -} + local->op_ret = 0; + if (local->xattr == NULL) { + local->xattr = dict_ref(xattr); + } else { + dht_aggregate_xattr(local->xattr, xattr); + } -int -dht_lookup_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno, - inode_t *inode, struct stat *stbuf, dict_t *xattr, - struct stat *postparent) -{ - char is_linkfile = 0; - char is_dir = 0; - xlator_t *subvol = NULL; - dht_conf_t *conf = NULL; - dht_local_t *local = NULL; - loc_t *loc = NULL; - call_frame_t *prev = NULL; - int ret = 0; - uint64_t tmp_layout = 0; - dht_layout_t *parent_layout = NULL; - - conf = this->private; - - prev = cookie; - local = frame->local; - loc = &local->loc; - - if (ENTRY_MISSING (op_ret, op_errno)) { - if (conf->search_unhashed == GF_DHT_LOOKUP_UNHASHED_ON) { - local->op_errno = ENOENT; - dht_lookup_everywhere (frame, this, loc); - return 0; - } - if ((conf->search_unhashed == GF_DHT_LOOKUP_UNHASHED_AUTO) && - (loc->parent)) { - ret = inode_ctx_get (loc->parent, this, &tmp_layout); - parent_layout = (dht_layout_t *)(long)tmp_layout; - if (parent_layout->search_unhashed) { - local->op_errno = ENOENT; - dht_lookup_everywhere (frame, this, loc); - return 0; - } + if (__is_root_gfid(stbuf->ia_gfid)) { + ret = dht_dir_has_layout(xattr, conf->xattr_name); + if (ret >= 0) { + if (is_greater_time(local->prebuf.ia_ctime, + local->prebuf.ia_ctime_nsec, + stbuf->ia_ctime, stbuf->ia_ctime_nsec)) { + /* Choose source */ + local->prebuf.ia_gid = stbuf->ia_gid; + local->prebuf.ia_uid = stbuf->ia_uid; + + local->prebuf.ia_ctime = stbuf->ia_ctime; + local->prebuf.ia_ctime_nsec = stbuf->ia_ctime_nsec; + local->prebuf.ia_prot = stbuf->ia_prot; } - } - - if (op_ret == 0) { - is_dir = check_is_dir (inode, stbuf, xattr); - if (is_dir) { - local->inode = inode_ref (inode); - local->xattr = dict_ref (xattr); - } - } - - if (is_dir || (op_ret == -1 && op_errno == ENOTCONN)) { - dht_lookup_directory (frame, this, &local->loc); - return 0; - } - - if (op_ret == -1) - goto out; + } + } - is_linkfile = check_is_linkfile (inode, stbuf, xattr); - is_dir = check_is_dir (inode, stbuf, xattr); - - if (!is_dir && !is_linkfile) { - /* non-directory and not a linkfile */ - - dht_itransform (this, prev->this, stbuf->st_ino, - &stbuf->st_ino); - if (loc->parent) - postparent->st_ino = loc->parent->ino; - - ret = dht_layout_preset (this, prev->this, inode); - if (ret < 0) { - gf_log (this->name, GF_LOG_DEBUG, - "could not set pre-set layout for subvolume %s", - prev->this->name); - op_ret = -1; - op_errno = EINVAL; - goto out; - } - goto out; - } + if (local->stbuf.ia_type != IA_INVAL) { + /* This is not the first subvol to respond + * Compare values to see if attrs need to be healed + */ + if ((local->stbuf.ia_gid != stbuf->ia_gid) || + (local->stbuf.ia_uid != stbuf->ia_uid) || + (is_permission_different(&local->stbuf.ia_prot, + &stbuf->ia_prot))) { + local->need_attrheal = 1; + } + } - if (is_linkfile) { - subvol = dht_linkfile_subvol (this, inode, stbuf, xattr); - - if (!subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "linkfile not having link subvolume. path=%s", - loc->path); - dht_lookup_everywhere (frame, this, loc); - return 0; - } + if (local->inode == NULL) + local->inode = inode_ref(inode); - STACK_WIND (frame, dht_lookup_linkfile_cbk, - subvol, subvol->fops->lookup, - &local->loc, local->xattr_req); + dht_iatt_merge(this, &local->stbuf, stbuf); + dht_iatt_merge(this, &local->postparent, postparent); + + if (!dict_get(xattr, conf->mds_xattr_key)) { + gf_msg_debug(this->name, 0, + "%s: mds xattr %s is not present " + "on %s(gfid = %s)", + local->loc.path, conf->mds_xattr_key, prev->name, + gfid_local); + goto unlock; } - return 0; + /* Save the mds subvol info and stbuf. This is the value that will + * be used for healing + */ + local->mds_subvol = prev; + local->mds_stbuf = *stbuf; + + /* Save mds subvol on inode ctx */ + + ret = dht_inode_ctx_mdsvol_set(local->inode, this, prev); + if (ret) { + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_SET_INODE_CTX_FAILED, + "%s: Failed to set mds (%s)", local->loc.path, prev->name); + } + check_mds = dht_dict_get_array(xattr, conf->mds_xattr_key, + mds_xattr_val, 1, &errst); + if ((check_mds < 0) && !errst) { + /* Check if xattrs need to be healed on the directories */ + local->mds_xattr = dict_ref(xattr); + gf_msg_debug(this->name, 0, + "%s: %s is not zero on %s. Xattrs need to be healed." + "(gfid = %s)", + local->loc.path, conf->mds_xattr_key, prev->name, + gfid_local); + local->need_xattr_heal = 1; + } + } + +unlock: + UNLOCK(&frame->lock); + + this_call_cnt = dht_frame_return(frame); + + if (is_last_call(this_call_cnt)) { + /* If the mds subvol is not set correctly*/ + if (!__is_root_gfid(local->gfid) && + (!dict_get(local->xattr, conf->mds_xattr_key))) { + local->need_selfheal = 1; + } + + /* No need to call xattr heal code if volume count is 1 + */ + if (conf->subvolume_cnt == 1) { + local->need_xattr_heal = 0; + } + + if (local->need_selfheal || local->need_lookup_everywhere) { + /* Set the gfid-req so posix will set the GFID*/ + if (!gf_uuid_is_null(local->gfid)) { + /* Ok, this should _never_ happen */ + ret = dict_set_static_bin(local->xattr_req, "gfid-req", + local->gfid, 16); + } else { + if (!gf_uuid_is_null(local->gfid_req)) + ret = dict_set_static_bin(local->xattr_req, "gfid-req", + local->gfid_req, 16); + } + } + + if (local->need_lookup_everywhere) { + local->need_lookup_everywhere = 0; + dht_lookup_everywhere(frame, this, &local->loc); + return 0; + } + + if (local->op_ret == 0) { + if (dht_needs_selfheal(frame, this)) { + goto selfheal; + } + dht_layout_set(this, local->inode, layout); + if (local->inode) { + dht_inode_ctx_time_update(local->inode, this, &local->stbuf, 1); + } + + if (local->loc.parent) { + dht_inode_ctx_time_update(local->loc.parent, this, + &local->postparent, 1); + } + } + + DHT_STRIP_PHASE1_FLAGS(&local->stbuf); + dht_set_fixed_dir_stat(&local->postparent); + /* Delete mds xattr at the time of STACK UNWIND */ + if (local->xattr) + GF_REMOVE_INTERNAL_XATTR(conf->mds_xattr_key, local->xattr); + + DHT_STACK_UNWIND(lookup, frame, local->op_ret, local->op_errno, + local->inode, &local->stbuf, local->xattr, + &local->postparent); + } + + return 0; + +selfheal: + FRAME_SU_DO(frame, dht_local_t); + ret = dht_selfheal_directory(frame, dht_lookup_selfheal_cbk, &local->loc, + layout); out: - /* - * FIXME: postparent->st_size and postparent->st_blocks do not have - * correct values. since, postparent corresponds to a directory these - * two members should have values equal to sum of corresponding values - * from each of the subvolume. See dht_stat_merge for reference. - */ - DHT_STACK_UNWIND (lookup, frame, op_ret, op_errno, inode, stbuf, xattr, - postparent); - return 0; + return ret; } +static int +dht_lookup_directory(call_frame_t *frame, xlator_t *this, loc_t *loc) +{ + int call_cnt = 0; + int i = 0; + dht_conf_t *conf = NULL; + dht_local_t *local = NULL; + int ret = 0; + + GF_VALIDATE_OR_GOTO("dht", frame, out); + GF_VALIDATE_OR_GOTO("dht", this, unwind); + GF_VALIDATE_OR_GOTO("dht", frame->local, unwind); + GF_VALIDATE_OR_GOTO("dht", this->private, unwind); + GF_VALIDATE_OR_GOTO("dht", loc, unwind); + + conf = this->private; + local = frame->local; + + call_cnt = conf->subvolume_cnt; + local->call_cnt = call_cnt; + + local->layout = dht_layout_new(this, conf->subvolume_cnt); + if (!local->layout) { + goto unwind; + } + + if (local->xattr != NULL) { + dict_unref(local->xattr); + local->xattr = NULL; + } + + if (!gf_uuid_is_null(local->gfid)) { + /* use this gfid in order to heal any missing ones */ + ret = dict_set_gfuuid(local->xattr_req, "gfid-req", local->gfid, true); + if (ret) + gf_msg(this->name, GF_LOG_WARNING, 0, DHT_MSG_DICT_SET_FAILED, + "%s: Failed to set dictionary value:" + " key = gfid-req", + local->loc.path); + } + + for (i = 0; i < call_cnt; i++) { + STACK_WIND_COOKIE( + frame, dht_lookup_dir_cbk, conf->subvolumes[i], conf->subvolumes[i], + conf->subvolumes[i]->fops->lookup, &local->loc, local->xattr_req); + } + return 0; +unwind: + DHT_STACK_UNWIND(lookup, frame, -1, ENOMEM, NULL, NULL, NULL, NULL); +out: + return 0; +} int -dht_lookup (call_frame_t *frame, xlator_t *this, - loc_t *loc, dict_t *xattr_req) -{ - xlator_t *subvol = NULL; - xlator_t *hashed_subvol = NULL; - xlator_t *cached_subvol = NULL; - dht_local_t *local = NULL; - dht_conf_t *conf = NULL; - int ret = -1; - int op_errno = -1; - dht_layout_t *layout = NULL; - int i = 0; - int call_cnt = 0; - - - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (loc, err); - VALIDATE_OR_GOTO (loc->inode, err); - VALIDATE_OR_GOTO (loc->path, err); - - conf = this->private; - - local = dht_local_init (frame); - if (!local) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } - - ret = loc_dup (loc, &local->loc); - if (ret == -1) { - op_errno = errno; - gf_log (this->name, GF_LOG_DEBUG, - "copying location failed for path=%s", - loc->path); - goto err; +dht_revalidate_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, inode_t *inode, struct iatt *stbuf, + dict_t *xattr, struct iatt *postparent) +{ + dht_local_t *local = NULL; + int this_call_cnt = 0; + xlator_t *prev = NULL; + dht_layout_t *layout = NULL; + dht_conf_t *conf = NULL; + int ret = -1; + int is_dir = 0; + int is_linkfile = 0; + int follow_link = 0; + char gfid[GF_UUID_BUF_SIZE] = {0}; + uint32_t vol_commit_hash = 0; + xlator_t *subvol = NULL; + int32_t check_mds = 0; + int errst = 0, i = 0; + int32_t mds_xattr_val[1] = {0}; + + GF_VALIDATE_OR_GOTO("dht", frame, err); + GF_VALIDATE_OR_GOTO("dht", this, err); + GF_VALIDATE_OR_GOTO("dht", frame->local, err); + GF_VALIDATE_OR_GOTO("dht", cookie, err); + GF_VALIDATE_OR_GOTO("dht", this->private, err); + + local = frame->local; + prev = cookie; + conf = this->private; + + if (!conf->vch_forced) { + /* Update the commithash value if available + */ + ret = dict_get_uint32(xattr, conf->commithash_xattr_name, + &vol_commit_hash); + if (ret == 0) { + conf->vol_commit_hash = vol_commit_hash; + } + } + + gf_uuid_unparse(local->loc.gfid, gfid); + + gf_msg_debug(this->name, op_errno, + "%s: revalidate lookup on %s returned op_ret %d", + local->loc.path, prev->name, op_ret); + + LOCK(&frame->lock); + { + if (gf_uuid_is_null(local->gfid)) { + memcpy(local->gfid, local->loc.gfid, 16); + } + + if (op_ret == -1) { + local->op_errno = op_errno; + + if ((op_errno != ENOTCONN) && (op_errno != ENOENT) && + (op_errno != ESTALE)) { + gf_msg(this->name, GF_LOG_INFO, op_errno, + DHT_MSG_REVALIDATE_CBK_INFO, + "Revalidate: subvolume %s for %s " + "(gfid = %s) returned -1", + prev->name, local->loc.path, gfid); + } + if (op_errno == ESTALE) { + /* propagate the ESTALE to parent. + * setting local->return_estale would send + * ESTALE to parent. */ + local->return_estale = 1; + } + + /* if it is ENOENT, we may have to do a + * 'lookup_everywhere()' to make sure + * the file is not migrated */ + if (op_errno == ENOENT) { + if (IA_ISREG(local->loc.inode->ia_type)) { + gf_msg_debug(this->name, 0, + "found ENOENT for %s. " + "Setting " + "need_lookup_everywhere" + " flag to 1", + local->loc.path); + + local->need_lookup_everywhere = 1; + } else if (IA_ISDIR(local->loc.inode->ia_type)) { + layout = local->layout; + for (i = 0; i < layout->cnt; i++) { + if (layout->list[i].xlator == prev) { + layout->list[i].err = op_errno; + break; + } + } + + local->need_selfheal = 1; + } + } + + /* The GFID is missing on this subvol. Lookup everywhere to force a + * gfid heal + */ + if ((op_errno == ENODATA) && + (IA_ISDIR(local->loc.inode->ia_type))) { + local->need_lookup_everywhere = 1; + } + + goto unlock; } - - if (xattr_req) { - local->xattr_req = dict_ref (xattr_req); - } else { - local->xattr_req = dict_new (); - } - hashed_subvol = dht_subvol_get_hashed (this, loc); - cached_subvol = dht_subvol_get_cached (this, loc->inode); + if ((!IA_ISINVAL(local->inode->ia_type)) && + stbuf->ia_type != local->inode->ia_type) { + gf_msg(this->name, GF_LOG_WARNING, 0, DHT_MSG_FILE_TYPE_MISMATCH, + "mismatching filetypes 0%o v/s 0%o for %s," + " gfid = %s", + (stbuf->ia_type), (local->inode->ia_type), local->loc.path, + gfid); - local->cached_subvol = cached_subvol; - local->hashed_subvol = hashed_subvol; + local->op_ret = -1; + local->op_errno = EINVAL; - if (is_revalidate (loc)) { - local->layout = layout = dht_layout_get (this, loc->inode); + goto unlock; + } + + layout = local->layout; - if (!layout) { - gf_log (this->name, GF_LOG_DEBUG, - "revalidate without cache. path=%s", - loc->path); - op_errno = EINVAL; - goto err; + is_dir = check_is_dir(inode, stbuf, xattr); + is_linkfile = check_is_linkfile(inode, stbuf, xattr, + conf->link_xattr_name); + if (is_linkfile) { + follow_link = 1; + goto unlock; + } + if (is_dir) { + ret = dht_dir_has_layout(xattr, conf->xattr_name); + if (ret >= 0) { + if (is_greater_time(local->prebuf.ia_ctime, + local->prebuf.ia_ctime_nsec, + stbuf->ia_ctime, stbuf->ia_ctime_nsec)) { + /* Choose source */ + local->prebuf.ia_gid = stbuf->ia_gid; + local->prebuf.ia_uid = stbuf->ia_uid; + + local->prebuf.ia_ctime = stbuf->ia_ctime; + local->prebuf.ia_ctime_nsec = stbuf->ia_ctime_nsec; + + if (__is_root_gfid(stbuf->ia_gfid)) + local->prebuf.ia_prot = stbuf->ia_prot; + } + } + + if (local->stbuf.ia_type != IA_INVAL) { + if ((local->stbuf.ia_gid != stbuf->ia_gid) || + (local->stbuf.ia_uid != stbuf->ia_uid) || + is_permission_different(&local->stbuf.ia_prot, + &stbuf->ia_prot)) { + local->need_attrheal = 1; + } + } + + if (!dict_get(xattr, conf->mds_xattr_key)) { + gf_msg_debug(this->name, 0, + "%s: internal xattr %s is not present" + " on subvol %s(gfid is %s)", + local->loc.path, conf->mds_xattr_key, prev->name, + gfid); + } else { + check_mds = dht_dict_get_array(xattr, conf->mds_xattr_key, + mds_xattr_val, 1, &errst); + local->mds_subvol = prev; + local->mds_stbuf.ia_gid = stbuf->ia_gid; + local->mds_stbuf.ia_uid = stbuf->ia_uid; + local->mds_stbuf.ia_prot = stbuf->ia_prot; + + /* save mds subvol on inode ctx */ + ret = dht_inode_ctx_mdsvol_set(local->inode, this, prev); + if (ret) { + gf_msg(this->name, GF_LOG_ERROR, 0, + DHT_MSG_SET_INODE_CTX_FAILED, + "Failed to set MDS subvol for %s vol is %s", + local->loc.path, prev->name); } + if ((check_mds < 0) && !errst) { + /* Check if xattrs need to be healed on the directory + */ + local->mds_xattr = dict_ref(xattr); + gf_msg_debug(this->name, 0, + "Value of %s is not zero on " + "hashed subvol so xattr needs to" + " be healed on non hashed" + " path is %s and vol name is %s " + " gfid is %s", + conf->mds_xattr_key, local->loc.path, + prev->name, gfid); + local->need_xattr_heal = 1; + } + } + ret = dht_layout_dir_mismatch(this, layout, prev, &local->loc, + xattr); + if (ret != 0) { + /* In memory layout does not match on-disk layout. + */ + gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_LAYOUT_MISMATCH, + "Mismatching layouts for %s, gfid = %s", local->loc.path, + gfid); + + local->layout_mismatch = 1; + + goto unlock; + } + } + + gf_uuid_copy(local->stbuf.ia_gfid, stbuf->ia_gfid); + dht_iatt_merge(this, &local->stbuf, stbuf); + dht_iatt_merge(this, &local->postparent, postparent); - if (layout->gen && (layout->gen < conf->gen)) { - gf_log (this->name, GF_LOG_TRACE, - "incomplete layout failure for path=%s", - loc->path); - - dht_layout_unref (this, local->layout); - local->layout = NULL; - goto do_fresh_lookup; - } - - local->inode = inode_ref (loc->inode); - local->st_ino = loc->inode->ino; - - local->call_cnt = layout->cnt; - call_cnt = local->call_cnt; - - /* NOTE: we don't require 'trusted.glusterfs.dht.linkto' attribute, - * revalidates directly go to the cached-subvolume. - */ - ret = dict_set_uint32 (local->xattr_req, - "trusted.glusterfs.dht", 4 * 4); - - for (i = 0; i < layout->cnt; i++) { - subvol = layout->list[i].xlator; - - STACK_WIND (frame, dht_revalidate_cbk, - subvol, subvol->fops->lookup, - loc, local->xattr_req); - - if (!--call_cnt) - break; - } + local->op_ret = 0; + + if (!local->xattr) { + local->xattr = dict_ref(xattr); + } else if (is_dir) { + dht_aggregate_xattr(local->xattr, xattr); + } + } +unlock: + UNLOCK(&frame->lock); + + if (follow_link) { + /* Found a linkto file. Follow it to see if the target file exists + */ + gf_uuid_copy(local->gfid, stbuf->ia_gfid); + + subvol = dht_linkfile_subvol(this, inode, stbuf, xattr); + if (!subvol) { + op_errno = ESTALE; + local->op_ret = -1; } else { - do_fresh_lookup: - /* TODO: remove the hard-coding */ - ret = dict_set_uint32 (local->xattr_req, - "trusted.glusterfs.dht", 4 * 4); - - ret = dict_set_uint32 (local->xattr_req, - "trusted.glusterfs.dht.linkto", 256); - - if (!hashed_subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no subvolume in layout for path=%s, " - "checking on all the subvols to see if " - "it is a directory", loc->path); - call_cnt = conf->subvolume_cnt; - local->call_cnt = call_cnt; - - local->layout = dht_layout_new (this, - conf->subvolume_cnt); - if (!local->layout) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } - - for (i = 0; i < call_cnt; i++) { - STACK_WIND (frame, dht_lookup_dir_cbk, - conf->subvolumes[i], - conf->subvolumes[i]->fops->lookup, - &local->loc, local->xattr_req); - } - return 0; + STACK_WIND_COOKIE(frame, dht_lookup_linkfile_cbk, subvol, subvol, + subvol->fops->lookup, &local->loc, + local->xattr_req); + return 0; + } + } + + this_call_cnt = dht_frame_return(frame); + + if (is_last_call(this_call_cnt)) { + if (!IA_ISDIR(local->stbuf.ia_type) && + (local->hashed_subvol != local->cached_subvol) && + (local->stbuf.ia_nlink == 1) && + (conf && conf->unhashed_sticky_bit)) { + local->stbuf.ia_prot.sticky = 1; + } + /* No need to call heal code if volume count is 1 + */ + if (conf->subvolume_cnt == 1) + local->need_xattr_heal = 0; + + if (IA_ISDIR(local->stbuf.ia_type)) { + /* No mds xattr found. Trigger a heal to set it */ + if (!__is_root_gfid(local->loc.inode->gfid) && + (!dict_get(local->xattr, conf->mds_xattr_key))) + local->need_selfheal = 1; + + if (dht_needs_selfheal(frame, this)) { + if (!__is_root_gfid(local->loc.inode->gfid)) { + if (local->mds_subvol) { + local->stbuf.ia_gid = local->mds_stbuf.ia_gid; + local->stbuf.ia_uid = local->mds_stbuf.ia_uid; + local->stbuf.ia_prot = local->mds_stbuf.ia_prot; + } + } else { + local->stbuf.ia_gid = local->prebuf.ia_gid; + local->stbuf.ia_uid = local->prebuf.ia_uid; + local->stbuf.ia_prot = local->prebuf.ia_prot; + } + + layout = local->layout; + dht_selfheal_directory(frame, dht_lookup_selfheal_cbk, + &local->loc, layout); + return 0; + } + } + + if (local->layout_mismatch) { + /* Found layout mismatch in the directory, need to + fix this in the inode context */ + dht_layout_unref(this, local->layout); + local->layout = NULL; + dht_lookup_directory(frame, this, &local->loc); + return 0; + } + + if (local->need_lookup_everywhere) { + /* As the current layout gave ENOENT error, we would + need a new layout */ + dht_layout_unref(this, local->layout); + local->layout = NULL; + + /* We know that current cached subvol is no longer + valid, get the new one */ + local->cached_subvol = NULL; + if (local->xattr_req) { + if (!gf_uuid_is_null(local->gfid)) { + ret = dict_set_static_bin(local->xattr_req, "gfid-req", + local->gfid, 16); } + } - STACK_WIND (frame, dht_lookup_cbk, - hashed_subvol, hashed_subvol->fops->lookup, - loc, local->xattr_req); + dht_lookup_everywhere(frame, this, &local->loc); + return 0; + } + if (local->return_estale) { + local->op_ret = -1; + local->op_errno = ESTALE; } - return 0; + if (local->loc.parent) { + dht_inode_ctx_time_update(local->loc.parent, this, + &local->postparent, 1); + } + + DHT_STRIP_PHASE1_FLAGS(&local->stbuf); + dht_set_fixed_dir_stat(&local->postparent); + + /* local->stbuf is updated only from subvols which have a layout + * The reason is to avoid choosing attr heal source from newly + * added bricks. In case e.g we have only one subvol and for + * some reason layout is not present on it, then local->stbuf + * will be EINVAL. This is an indication that the subvols + * active in the cluster do not have layouts on disk. + * Unwind with ESTALE to trigger a fresh lookup */ + if (is_dir && local->stbuf.ia_type == IA_INVAL) { + local->op_ret = -1; + local->op_errno = ESTALE; + } + /* Delete mds xattr at the time of STACK UNWIND */ + if (local->xattr) + GF_REMOVE_INTERNAL_XATTR(conf->mds_xattr_key, local->xattr); + + DHT_STACK_UNWIND(lookup, frame, local->op_ret, local->op_errno, + local->inode, &local->stbuf, local->xattr, + &local->postparent); + } err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (lookup, frame, -1, op_errno, NULL, NULL, NULL, NULL); - return 0; + return ret; } +static int +dht_lookup_linkfile_create_cbk(call_frame_t *frame, void *cooie, xlator_t *this, + int32_t op_ret, int32_t op_errno, inode_t *inode, + struct iatt *stbuf, struct iatt *preparent, + struct iatt *postparent, dict_t *xdata) +{ + dht_local_t *local = NULL; + xlator_t *cached_subvol = NULL; + dht_conf_t *conf = NULL; + int ret = -1; + char gfid[GF_UUID_BUF_SIZE] = {0}; + + GF_VALIDATE_OR_GOTO("dht", frame, out); + GF_VALIDATE_OR_GOTO("dht", this, out); + GF_VALIDATE_OR_GOTO("dht", frame->local, out); + GF_VALIDATE_OR_GOTO("dht", this->private, out); + + local = frame->local; + cached_subvol = local->cached_subvol; + conf = this->private; + + gf_uuid_unparse(local->loc.gfid, gfid); + + if (local->locked) + dht_unlock_namespace(frame, &local->lock[0]); + + ret = dht_layout_preset(this, local->cached_subvol, local->loc.inode); + if (ret < 0) { + gf_msg_debug(this->name, EINVAL, + "Failed to set layout for subvolume %s, " + "(gfid = %s)", + cached_subvol ? cached_subvol->name : "<nil>", gfid); + local->op_ret = -1; + local->op_errno = EINVAL; + goto unwind; + } + + local->op_ret = 0; + if ((local->stbuf.ia_nlink == 1) && (conf && conf->unhashed_sticky_bit)) { + local->stbuf.ia_prot.sticky = 1; + } + + if (local->loc.parent) { + dht_inode_ctx_time_update(local->loc.parent, this, postparent, 1); + } -int -dht_truncate_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno, struct stat *prebuf, - struct stat *postbuf) -{ - dht_local_t *local = NULL; - int this_call_cnt = 0; - call_frame_t *prev = NULL; - - - local = frame->local; - prev = cookie; - - LOCK (&frame->lock); - { - if (op_ret == -1) { - local->op_errno = op_errno; - gf_log (this->name, GF_LOG_DEBUG, - "subvolume %s returned -1 (%s)", - prev->this->name, strerror (op_errno)); - goto unlock; - } - - dht_stat_merge (this, &local->prebuf, prebuf, prev->this); - dht_stat_merge (this, &local->stbuf, postbuf, prev->this); - - if (local->inode) { - local->stbuf.st_ino = local->inode->ino; - local->prebuf.st_ino = local->inode->ino; - } +unwind: + gf_msg_debug(this->name, 0, + "creation of linkto on hashed subvol:%s, " + "returned with op_ret %d and op_errno %d: %s", + local->hashed_subvol->name, op_ret, op_errno, + uuid_utoa(local->loc.gfid)); - local->op_ret = 0; - } -unlock: - UNLOCK (&frame->lock); + if (local->linked == _gf_true) + dht_linkfile_attr_heal(frame, this); - this_call_cnt = dht_frame_return (frame); - if (is_last_call (this_call_cnt)) - DHT_STACK_UNWIND (truncate, frame, local->op_ret, local->op_errno, - &local->prebuf, &local->stbuf); + dht_set_fixed_dir_stat(&local->postparent); - return 0; + DHT_STRIP_PHASE1_FLAGS(&local->stbuf); + DHT_STACK_UNWIND(lookup, frame, local->op_ret, local->op_errno, + local->inode, &local->stbuf, local->xattr, + &local->postparent); +out: + return ret; } +static int +dht_lookup_unlink_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, struct iatt *preparent, + struct iatt *postparent, dict_t *xdata) +{ + int this_call_cnt = 0; + dht_local_t *local = NULL; + const char *path = NULL; + local = (dht_local_t *)frame->local; + path = local->loc.path; + FRAME_SU_UNDO(frame, dht_local_t); -int -dht_attr_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno, struct stat *stbuf) -{ - dht_local_t *local = NULL; - int this_call_cnt = 0; - call_frame_t *prev = NULL; - - - local = frame->local; - prev = cookie; - - LOCK (&frame->lock); - { - if (op_ret == -1) { - local->op_errno = op_errno; - gf_log (this->name, GF_LOG_DEBUG, - "subvolume %s returned -1 (%s)", - prev->this->name, strerror (op_errno)); - goto unlock; - } - - dht_stat_merge (this, &local->stbuf, stbuf, prev->this); - - if (local->inode) - local->stbuf.st_ino = local->inode->ino; - local->op_ret = 0; - } -unlock: - UNLOCK (&frame->lock); + gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_UNLINK_LOOKUP_INFO, + "lookup_unlink returned with " + "op_ret -> %d and op-errno -> %d for %s", + op_ret, op_errno, ((path == NULL) ? "null" : path)); - this_call_cnt = dht_frame_return (frame); - if (is_last_call (this_call_cnt)) - DHT_STACK_UNWIND (stat, frame, local->op_ret, local->op_errno, - &local->stbuf); + this_call_cnt = dht_frame_return(frame); + if (is_last_call(this_call_cnt)) { + dht_lookup_everywhere_done(frame, this); + } - return 0; + return 0; } - -int -dht_stat (call_frame_t *frame, xlator_t *this, - loc_t *loc) +static int +dht_lookup_unlink_of_false_linkto_cbk(call_frame_t *frame, void *cookie, + xlator_t *this, int op_ret, int op_errno, + struct iatt *preparent, + struct iatt *postparent, dict_t *xdata) { - xlator_t *subvol = NULL; - int op_errno = -1; - dht_local_t *local = NULL; - dht_layout_t *layout = NULL; - int i = 0; + int this_call_cnt = 0; + dht_local_t *local = NULL; + const char *path = NULL; + + local = (dht_local_t *)frame->local; + path = local->loc.path; + FRAME_SU_UNDO(frame, dht_local_t); - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (loc, err); - VALIDATE_OR_GOTO (loc->inode, err); - VALIDATE_OR_GOTO (loc->path, err); + gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_UNLINK_LOOKUP_INFO, + "lookup_unlink returned with " + "op_ret -> %d and op-errno -> %d for %s", + op_ret, op_errno, ((path == NULL) ? "null" : path)); + this_call_cnt = dht_frame_return(frame); + if (is_last_call(this_call_cnt)) { + if ((op_ret == 0) || ((op_errno != EBUSY) && (op_errno != ENOTCONN))) { + dht_lookup_everywhere_done(frame, this); + } else { + /*When dht_lookup_everywhere is performed, one cached + *and one hashed file was found and hashed file does + *not point to the above mentioned cached node. So it + *was considered as stale and an unlink was performed. + *But unlink fails. So may be rebalance is in progress. + *now ideally we have two data-files. One obtained during + *lookup_everywhere and one where unlink-failed. So + *at this point in time we cannot decide which one to + *choose because there are chances of first cached + *file is truncated after rebalance and if it is chosen + *as cached node, application will fail. So return EIO.*/ + + if (op_errno == EBUSY) { + gf_msg(this->name, GF_LOG_ERROR, op_errno, + DHT_MSG_UNLINK_FAILED, + "Could not unlink the linkto file as " + "either fd is open and/or linkto xattr " + "is set for %s", + ((path == NULL) ? "null" : path)); + } + DHT_STACK_UNWIND(lookup, frame, -1, EIO, NULL, NULL, NULL, NULL); + } + } - local = dht_local_init (frame); - if (!local) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } + return 0; +} - local->layout = layout = dht_layout_get (this, loc->inode); - if (!layout) { - gf_log (this->name, GF_LOG_DEBUG, - "no layout for path=%s", loc->path); - op_errno = EINVAL; - goto err; - } +static int +dht_lookup_unlink_stale_linkto_cbk(call_frame_t *frame, void *cookie, + xlator_t *this, int op_ret, int op_errno, + struct iatt *preparent, + struct iatt *postparent, dict_t *xdata) +{ + dht_local_t *local = NULL; + const char *path = NULL; - local->inode = inode_ref (loc->inode); - local->call_cnt = layout->cnt; + /* NOTE: + * If stale file unlink fails either there is an open-fd or is not an + * dht-linkto-file then posix_unlink returns EBUSY, which is overwritten + * to ENOENT + */ - for (i = 0; i < layout->cnt; i++) { - subvol = layout->list[i].xlator; + local = frame->local; - STACK_WIND (frame, dht_attr_cbk, - subvol, subvol->fops->stat, - loc); - } + if (local) { + FRAME_SU_UNDO(frame, dht_local_t); + if (local->loc.path) + path = local->loc.path; + } - return 0; + gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_UNLINK_LOOKUP_INFO, + "Returned with op_ret %d and " + "op_errno %d for %s", + op_ret, op_errno, ((path == NULL) ? "null" : path)); -err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (stat, frame, -1, op_errno, NULL); + DHT_STACK_UNWIND(lookup, frame, -1, ENOENT, NULL, NULL, NULL, NULL); - return 0; + return 0; } +static int +dht_fill_dict_to_avoid_unlink_of_migrating_file(dict_t *dict) +{ + int ret = 0; + + ret = dict_set_int32_sizen(dict, DHT_SKIP_NON_LINKTO_UNLINK, 1); -int -dht_fstat (call_frame_t *frame, xlator_t *this, - fd_t *fd) -{ - xlator_t *subvol = NULL; - int op_errno = -1; - dht_local_t *local = NULL; - dht_layout_t *layout = NULL; - int i = 0; - - - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (fd, err); - - local = dht_local_init (frame); - if (!local) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } - - local->layout = layout = dht_layout_get (this, fd->inode); - if (!layout) { - gf_log (this->name, GF_LOG_DEBUG, - "no layout for fd=%p", fd); - op_errno = EINVAL; - goto err; - } - - local->inode = inode_ref (fd->inode); - local->call_cnt = layout->cnt;; - - for (i = 0; i < layout->cnt; i++) { - subvol = layout->list[i].xlator; - STACK_WIND (frame, dht_attr_cbk, - subvol, subvol->fops->fstat, - fd); - } - - return 0; + if (ret) + return -1; -err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (fstat, frame, -1, op_errno, NULL); + ret = dict_set_int32_sizen(dict, DHT_SKIP_OPEN_FD_UNLINK, 1); - return 0; + if (ret) + return -1; + + return 0; } +static int32_t +dht_linkfile_create_lookup_cbk(call_frame_t *frame, void *cookie, + xlator_t *this, int32_t op_ret, int32_t op_errno, + inode_t *inode, struct iatt *buf, dict_t *xdata, + struct iatt *postparent) +{ + dht_local_t *local = NULL; + int call_cnt = 0, ret = 0; + xlator_t *subvol = NULL; + uuid_t gfid = { + 0, + }; + char gfid_str[GF_UUID_BUF_SIZE] = {0}; + + subvol = cookie; + local = frame->local; + + if (subvol == local->hashed_subvol) { + if ((op_ret == 0) || (op_errno != ENOENT)) + local->dont_create_linkto = _gf_true; + } else { + if (gf_uuid_is_null(local->gfid)) + gf_uuid_copy(gfid, local->loc.gfid); + else + gf_uuid_copy(gfid, local->gfid); + + if ((op_ret == 0) && gf_uuid_compare(gfid, buf->ia_gfid)) { + gf_uuid_unparse(gfid, gfid_str); + gf_msg_debug(this->name, 0, + "gfid (%s) different on cached subvol " + "(%s) and looked up inode (%s), not " + "creating linkto", + uuid_utoa(buf->ia_gfid), subvol->name, gfid_str); + local->dont_create_linkto = _gf_true; + } else if (op_ret == -1) { + local->dont_create_linkto = _gf_true; + } + } + + call_cnt = dht_frame_return(frame); + if (is_last_call(call_cnt)) { + if (local->dont_create_linkto) + goto no_linkto; + else { + gf_msg_debug(this->name, 0, + "Creating linkto file on %s(hash) to " + "%s on %s (gfid = %s)", + local->hashed_subvol->name, local->loc.path, + local->cached_subvol->name, gfid_str); + + ret = dht_linkfile_create(frame, dht_lookup_linkfile_create_cbk, + this, local->cached_subvol, + local->hashed_subvol, &local->loc); + + if (ret < 0) + goto no_linkto; + } + } -int -dht_truncate (call_frame_t *frame, xlator_t *this, - loc_t *loc, off_t offset) + return 0; + +no_linkto: + gf_msg_debug(this->name, 0, + "skipped linkto creation (path:%s) (gfid:%s) " + "(hashed-subvol:%s) (cached-subvol:%s)", + local->loc.path, gfid_str, local->hashed_subvol->name, + local->cached_subvol->name); + + dht_lookup_linkfile_create_cbk(frame, NULL, this, 0, 0, local->loc.inode, + &local->stbuf, &local->preparent, + &local->postparent, local->xattr); + return 0; +} + +static int32_t +dht_call_lookup_linkfile_create(call_frame_t *frame, void *cookie, + xlator_t *this, int32_t op_ret, + int32_t op_errno, dict_t *xdata) { - xlator_t *subvol = NULL; - int op_errno = -1; - dht_local_t *local = NULL; + dht_local_t *local = NULL; + char gfid[GF_UUID_BUF_SIZE] = {0}; + int i = 0; + xlator_t *subvol = NULL; + local = frame->local; + if (gf_uuid_is_null(local->gfid)) + gf_uuid_unparse(local->loc.gfid, gfid); + else + gf_uuid_unparse(local->gfid, gfid); - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (loc, err); - VALIDATE_OR_GOTO (loc->inode, err); - VALIDATE_OR_GOTO (loc->path, err); + if (op_ret < 0) { + gf_log(this->name, GF_LOG_WARNING, + "protecting namespace failed, skipping linkto " + "creation (path:%s)(gfid:%s)(hashed-subvol:%s)" + "(cached-subvol:%s)", + local->loc.path, gfid, local->hashed_subvol->name, + local->cached_subvol->name); + goto err; + } - subvol = dht_subvol_get_cached (this, loc->inode); - if (!subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no cached subvolume for path=%s", loc->path); - op_errno = EINVAL; - goto err; - } + local->locked = _gf_true; - local = dht_local_init (frame); - if (!local) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } + local->call_cnt = 2; - local->inode = inode_ref (loc->inode); - local->call_cnt = 1; + for (i = 0; i < 2; i++) { + subvol = (subvol == NULL) ? local->hashed_subvol : local->cached_subvol; - STACK_WIND (frame, dht_truncate_cbk, - subvol, subvol->fops->truncate, - loc, offset); + STACK_WIND_COOKIE(frame, dht_linkfile_create_lookup_cbk, subvol, subvol, + subvol->fops->lookup, &local->loc, NULL); + } - return 0; + return 0; err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (truncate, frame, -1, op_errno, NULL, NULL); - - return 0; + dht_lookup_linkfile_create_cbk(frame, NULL, this, 0, 0, local->loc.inode, + &local->stbuf, &local->preparent, + &local->postparent, local->xattr); + return 0; } - -int -dht_ftruncate (call_frame_t *frame, xlator_t *this, - fd_t *fd, off_t offset) +/* Rebalance is performed from cached_node to hashed_node. Initial cached_node + * contains a non-linkto file. After migration it is converted to linkto and + * then unlinked. And at hashed_subvolume, first a linkto file is present, + * then after migration it is converted to a non-linkto file. + * + * Lets assume a file is present on cached subvolume and a new brick is added + * and new brick is the new_hashed subvolume. So fresh lookup on newly added + * hashed subvolume will fail and dht_lookup_everywhere gets called. If just + * before sending the dht_lookup_everywhere request rebalance is in progress, + * + * from cached subvolume it may see: Nonlinkto or linkto or No file + * from hashed subvolume it may see: No file or linkto file or non-linkto file + * + * So this boils down to 9 cases: + * at cached_subvol at hashed_subvol + * ---------------- ----------------- + * + *a) No file No file + * [request reached after [Request reached before + * migration] Migration] + * + *b) No file Linkto File + * + *c) No file Non-Linkto File + * + *d) Linkto No-File + * + *e) Linkto Linkto + * + *f) Linkto Non-Linkto + * + *g) NonLinkto No-File + * + *h) NonLinkto Linkto + * + *i) NonLinkto NonLinkto + * + * dht_lookup_everywhere_done takes decision based on any of the above case + */ + +static int +dht_lookup_everywhere_done(call_frame_t *frame, xlator_t *this) { - xlator_t *subvol = NULL; - int op_errno = -1; - dht_local_t *local = NULL; + int ret = 0; + dht_local_t *local = NULL; + xlator_t *hashed_subvol = NULL; + xlator_t *cached_subvol = NULL; + dht_layout_t *layout = NULL; + char gfid[GF_UUID_BUF_SIZE] = {0}; + gf_boolean_t found_non_linkto_on_hashed = _gf_false; + + local = frame->local; + hashed_subvol = local->hashed_subvol; + cached_subvol = local->cached_subvol; + + gf_uuid_unparse(local->loc.gfid, gfid); + + if (local->file_count && local->dir_count) { + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_FILE_TYPE_MISMATCH, + "path %s (gfid = %s)exists as a file on one " + "subvolume and directory on another. " + "Please fix it manually", + local->loc.path, gfid); + DHT_STACK_UNWIND(lookup, frame, -1, EIO, NULL, NULL, NULL, NULL); + return 0; + } + if (local->op_ret && local->gfid_missing) { + if (gf_uuid_is_null(local->gfid_req)) { + DHT_STACK_UNWIND(lookup, frame, -1, ENODATA, NULL, NULL, NULL, + NULL); + return 0; + } + /* A hack */ + dht_lookup_directory(frame, this, &local->loc); + return 0; + } + if (local->dir_count) { + dht_lookup_directory(frame, this, &local->loc); + return 0; + } + + gf_msg_debug(this->name, 0, + "STATUS: hashed_subvol %s " + "cached_subvol %s", + (hashed_subvol == NULL) ? "null" : hashed_subvol->name, + (cached_subvol == NULL) ? "null" : cached_subvol->name); + + if (!cached_subvol) { + if (local->skip_unlink.handle_valid_link && hashed_subvol) { + /*Purpose of "DHT_SKIP_NON_LINKTO_UNLINK": + * If this lookup is performed by rebalance and this + * rebalance process detected hashed file and by + * the time it sends the lookup request to cached node, + * file got migrated and now at initial hashed_node, + * final migrated file is present. With current logic, + * because this process fails to find the cached_node, + * it will unlink the file at initial hashed_node. + * + * So we avoid this by setting key, and checking at the + * posix_unlink that unlink the file only if file is a + * linkto file and not a migrated_file. + */ + + ret = dht_fill_dict_to_avoid_unlink_of_migrating_file( + local->xattr_req); + + if (ret) { + /* If for some reason, setting key in the dict + * fails, return with ENOENT, as with respect to + * this process, it detected only a stale link + * file. + * + * Next lookup will delete it. + * + * Performing deletion of stale link file when + * setting key in dict fails, may cause the data + * loss because of the above mentioned race. + */ + + DHT_STACK_UNWIND(lookup, frame, -1, ENOENT, NULL, NULL, NULL, + NULL); + } else { + local->skip_unlink.handle_valid_link = _gf_false; + + gf_msg_debug(this->name, 0, + "No Cached was found and " + "unlink on hashed was skipped" + " so performing now: %s", + local->loc.path); + FRAME_SU_DO(frame, dht_local_t); + STACK_WIND(frame, dht_lookup_unlink_stale_linkto_cbk, + hashed_subvol, hashed_subvol->fops->unlink, + &local->loc, 0, local->xattr_req); + } - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (fd, err); + } else { + gf_msg_debug(this->name, 0, + "There was no cached file and " + "unlink on hashed is not skipped %s", + local->loc.path); - subvol = dht_subvol_get_cached (this, fd->inode); - if (!subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no cached subvolume for fd=%p", fd); - op_errno = EINVAL; - goto err; - } + DHT_STACK_UNWIND(lookup, frame, -1, ENOENT, NULL, NULL, NULL, NULL); + } + return 0; + } + + /* At the time of dht_lookup, no file was found on hashed and that is + * why dht_lookup_everywhere is called, but by the time + * dht_lookup_everywhere + * reached to server, file might have already migrated. In that case we + * will find a migrated file at the hashed_node. In this case store the + * layout in context and return successfully. + */ + + if (hashed_subvol || local->need_lookup_everywhere) { + if (local->need_lookup_everywhere) { + found_non_linkto_on_hashed = _gf_true; + + } else if ((local->file_count == 1) && + (hashed_subvol == cached_subvol)) { + gf_msg_debug(this->name, 0, + "found cached file on hashed subvolume " + "so store in context and return for %s", + local->loc.path); + + found_non_linkto_on_hashed = _gf_true; + } - local = dht_local_init (frame); - if (!local) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } + if (found_non_linkto_on_hashed) + goto preset_layout; + } - local->inode = inode_ref (fd->inode); - local->call_cnt = 1; + if (hashed_subvol) { + if (local->skip_unlink.handle_valid_link == _gf_true) { + if (cached_subvol == local->skip_unlink.hash_links_to) { + if (gf_uuid_compare(local->skip_unlink.cached_gfid, + local->skip_unlink.hashed_gfid)) { + /*GFID different, return error*/ + DHT_STACK_UNWIND(lookup, frame, -1, ESTALE, NULL, NULL, + NULL, NULL); - STACK_WIND (frame, dht_truncate_cbk, - subvol, subvol->fops->ftruncate, - fd, offset); + return 0; + } - return 0; + ret = dht_layout_preset(this, cached_subvol, local->loc.inode); + if (ret) { + gf_msg(this->name, GF_LOG_INFO, 0, + DHT_MSG_LAYOUT_PRESET_FAILED, + "Could not set pre-set layout " + "for subvolume %s", + cached_subvol->name); + } -err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (ftruncate, frame, -1, op_errno, NULL, NULL); + local->op_ret = (ret == 0) ? ret : -1; + local->op_errno = (ret == 0) ? ret : EINVAL; - return 0; -} + /* Presence of local->cached_subvol validates + * that lookup from cached node is successful + */ + if (!local->op_ret && local->loc.parent) { + dht_inode_ctx_time_update(local->loc.parent, this, + &local->postparent, 1); + } -int -dht_unlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno, struct stat *preparent, - struct stat *postparent) -{ - dht_local_t *local = NULL; - int this_call_cnt = 0; - call_frame_t *prev = NULL; - - - local = frame->local; - prev = cookie; - - LOCK (&frame->lock); - { - if (op_ret == -1) { - local->op_errno = op_errno; - gf_log (this->name, GF_LOG_DEBUG, - "subvolume %s returned -1 (%s)", - prev->this->name, strerror (op_errno)); - goto unlock; - } - - local->op_ret = 0; - local->postparent = *postparent; - local->preparent = *preparent; - } -unlock: - UNLOCK (&frame->lock); + gf_msg_debug(this->name, 0, + "Skipped unlinking linkto file " + "on the hashed subvolume. " + "Returning success as it is a " + "valid linkto file. Path:%s", + local->loc.path); + + goto unwind_hashed_and_cached; + } else { + local->skip_unlink.handle_valid_link = _gf_false; + + gf_msg_debug(this->name, 0, + "Linkto file found on hashed " + "subvol " + "and data file found on cached " + "subvolume. But linkto points to " + "different cached subvolume (%s) " + "path %s", + (local->skip_unlink.hash_links_to + ? local->skip_unlink.hash_links_to->name + : " <nil>"), + local->loc.path); + + if (local->skip_unlink.opend_fd_count == 0) { + ret = dht_fill_dict_to_avoid_unlink_of_migrating_file( + local->xattr_req); + + if (ret) { + DHT_STACK_UNWIND(lookup, frame, -1, EIO, NULL, NULL, + NULL, NULL); + } else { + local->call_cnt = 1; + FRAME_SU_DO(frame, dht_local_t); + STACK_WIND(frame, dht_lookup_unlink_of_false_linkto_cbk, + hashed_subvol, hashed_subvol->fops->unlink, + &local->loc, 0, local->xattr_req); + } + + return 0; + } + } + } + } + +preset_layout: + + if (found_non_linkto_on_hashed) { + if (local->need_lookup_everywhere) { + if (gf_uuid_compare(local->gfid, local->inode->gfid)) { + /* GFID different, return error */ + DHT_STACK_UNWIND(lookup, frame, -1, ENOENT, NULL, NULL, NULL, + NULL); + return 0; + } + } + + local->op_ret = 0; + local->op_errno = 0; + layout = dht_layout_for_subvol(this, cached_subvol); + if (!layout) { + gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_SUBVOL_INFO, + "%s: no pre-set layout for subvolume %s," + " gfid = %s", + local->loc.path, + (cached_subvol ? cached_subvol->name : "<nil>"), gfid); + } - this_call_cnt = dht_frame_return (frame); - if (is_last_call (this_call_cnt)) - DHT_STACK_UNWIND (unlink, frame, local->op_ret, local->op_errno, - &local->preparent, &local->postparent); + ret = dht_layout_set(this, local->inode, layout); + if (ret < 0) { + gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_SUBVOL_INFO, + "%s: failed to set layout for subvol %s, " + "gfid = %s", + local->loc.path, + (cached_subvol ? cached_subvol->name : "<nil>"), gfid); + } + + if (local->loc.parent) { + dht_inode_ctx_time_update(local->loc.parent, this, + &local->postparent, 1); + } + DHT_STRIP_PHASE1_FLAGS(&local->stbuf); + dht_set_fixed_dir_stat(&local->postparent); + DHT_STACK_UNWIND(lookup, frame, local->op_ret, local->op_errno, + local->inode, &local->stbuf, local->xattr, + &local->postparent); return 0; -} + } + if (!hashed_subvol) { + gf_msg_debug(this->name, 0, + "Cannot create linkfile for %s on %s: " + "hashed subvolume cannot be found, gfid = %s.", + local->loc.path, cached_subvol->name, gfid); -int -dht_fsync_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, - int op_errno, struct stat *prebuf, struct stat *postbuf) + local->op_ret = 0; + local->op_errno = 0; + + ret = dht_layout_preset(frame->this, cached_subvol, local->inode); + if (ret < 0) { + gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_LAYOUT_PRESET_FAILED, + "Failed to set layout for subvol %s" + ", gfid = %s", + cached_subvol ? cached_subvol->name : "<nil>", gfid); + local->op_ret = -1; + local->op_errno = EINVAL; + } + + if (local->loc.parent) { + dht_inode_ctx_time_update(local->loc.parent, this, + &local->postparent, 1); + } + + DHT_STRIP_PHASE1_FLAGS(&local->stbuf); + dht_set_fixed_dir_stat(&local->postparent); + DHT_STACK_UNWIND(lookup, frame, local->op_ret, local->op_errno, + local->inode, &local->stbuf, local->xattr, + &local->postparent); + return 0; + } + + if (frame->root->op != GF_FOP_RENAME) { + local->current = &local->lock[0]; + ret = dht_protect_namespace(frame, &local->loc, hashed_subvol, + &local->current->ns, + dht_call_lookup_linkfile_create); + } else { + gf_msg_debug(this->name, 0, + "Creating linkto file on %s(hash) to %s on %s " + "(gfid = %s)", + hashed_subvol->name, local->loc.path, cached_subvol->name, + gfid); + + ret = dht_linkfile_create(frame, dht_lookup_linkfile_create_cbk, this, + cached_subvol, hashed_subvol, &local->loc); + } + + return ret; + +unwind_hashed_and_cached: + DHT_STRIP_PHASE1_FLAGS(&local->stbuf); + dht_set_fixed_dir_stat(&local->postparent); + DHT_STACK_UNWIND(lookup, frame, local->op_ret, local->op_errno, + local->inode, &local->stbuf, local->xattr, + &local->postparent); + return 0; +} + +static int +dht_lookup_everywhere_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, inode_t *inode, + struct iatt *buf, dict_t *xattr, + struct iatt *postparent) { - dht_local_t *local = NULL; - int this_call_cnt = 0; - call_frame_t *prev = NULL; + dht_local_t *local = NULL; + int this_call_cnt = 0; + xlator_t *prev = NULL; + int is_linkfile = 0; + int is_dir = 0; + loc_t *loc = NULL; + xlator_t *link_subvol = NULL; + int ret = -1; + int32_t fd_count = 0; + dht_conf_t *conf = NULL; + char gfid[GF_UUID_BUF_SIZE] = {0}; + dict_t *dict_req = {0}; + + GF_VALIDATE_OR_GOTO("dht", frame, out); + GF_VALIDATE_OR_GOTO("dht", this, out); + GF_VALIDATE_OR_GOTO("dht", frame->local, out); + GF_VALIDATE_OR_GOTO("dht", cookie, out); + GF_VALIDATE_OR_GOTO("dht", this->private, out); + + local = frame->local; + loc = &local->loc; + conf = this->private; + + prev = cookie; + + gf_msg_debug(this->name, 0, + "returned with op_ret %d and op_errno %d (%s) " + "from subvol %s", + op_ret, op_errno, loc->path, prev->name); + + LOCK(&frame->lock); + { + if (op_ret == -1) { + if (op_errno != ENOENT) + local->op_errno = op_errno; + if (op_errno == ENODATA) + local->gfid_missing = _gf_true; + goto unlock; + } + + if (gf_uuid_is_null(local->gfid)) + gf_uuid_copy(local->gfid, buf->ia_gfid); + + gf_uuid_unparse(local->gfid, gfid); + + if (gf_uuid_compare(local->gfid, buf->ia_gfid)) { + gf_msg(this->name, GF_LOG_WARNING, 0, DHT_MSG_GFID_MISMATCH, + "%s: gfid differs on subvolume %s," + " gfid local = %s, gfid node = %s", + loc->path, prev->name, gfid, uuid_utoa(buf->ia_gfid)); + } + + is_linkfile = check_is_linkfile(inode, buf, xattr, + conf->link_xattr_name); + if (is_linkfile) { + link_subvol = dht_linkfile_subvol(this, inode, buf, xattr); + gf_msg_debug(this->name, 0, "found on %s linkfile %s (-> %s)", + prev->name, loc->path, + link_subvol ? link_subvol->name : "''"); + goto unlock; + } - local = frame->local; - prev = cookie; + is_dir = check_is_dir(inode, buf, xattr); - LOCK (&frame->lock); - { - if (op_ret == -1) { - local->op_errno = op_errno; - gf_log (this->name, GF_LOG_DEBUG, - "subvolume %s returned -1 (%s)", - prev->this->name, strerror (op_errno)); - goto unlock; - } + /* non linkfile GFID takes precedence but don't overwrite + gfid if we have already found a cached file*/ + if (!local->cached_subvol) + gf_uuid_copy(local->gfid, buf->ia_gfid); - local->op_ret = 0; - } + if (is_dir) { + local->dir_count++; + + gf_msg_debug(this->name, 0, "found on %s directory %s", prev->name, + loc->path); + } else { + local->file_count++; + + gf_msg_debug(this->name, 0, "found cached file on %s for %s", + prev->name, loc->path); + + if (!local->cached_subvol) { + /* found one file */ + dht_iatt_merge(this, &local->stbuf, buf); + + local->xattr = dict_ref(xattr); + local->cached_subvol = prev; + + gf_msg_debug(this->name, 0, + "storing cached on %s file" + " %s", + prev->name, loc->path); + + dht_iatt_merge(this, &local->postparent, postparent); + + gf_uuid_copy(local->skip_unlink.cached_gfid, buf->ia_gfid); + } else { + /* This is where we need 'rename' both entries logic */ + gf_msg(this->name, GF_LOG_WARNING, 0, + DHT_MSG_FILE_ON_MULT_SUBVOL, + "multiple subvolumes (%s and %s) have " + "file %s (preferably rename the file " + "in the backend,and do a fresh lookup)", + local->cached_subvol->name, prev->name, local->loc.path); + } + } + } unlock: - UNLOCK (&frame->lock); + UNLOCK(&frame->lock); + + if (is_linkfile) { + ret = dict_get_int32(xattr, GLUSTERFS_OPEN_FD_COUNT, &fd_count); + + /* Any linkto file found on the non-hashed subvolume should + * be unlinked (performed in the "else if" block below) + * + * But if a linkto file is found on hashed subvolume, it may be + * pointing to valid cached node. So unlinking of linkto + * file on hashed subvolume is skipped and inside + * dht_lookup_everywhere_done, checks are performed. If this + * linkto file is found as stale linkto file, it is deleted + * otherwise unlink is skipped. + */ + + if (local->hashed_subvol && local->hashed_subvol == prev) { + local->skip_unlink.handle_valid_link = _gf_true; + local->skip_unlink.opend_fd_count = fd_count; + local->skip_unlink.hash_links_to = link_subvol; + gf_uuid_copy(local->skip_unlink.hashed_gfid, buf->ia_gfid); + + gf_msg_debug(this->name, 0, + "Found" + " one linkto file on hashed subvol %s " + "for %s: Skipping unlinking till " + "everywhere_done", + prev->name, loc->path); + + } else if (!ret && (fd_count == 0)) { + dict_req = dict_new(); + + ret = dht_fill_dict_to_avoid_unlink_of_migrating_file(dict_req); + + if (ret) { + /* Skip unlinking for dict_failure + *File is found as a linkto file on non-hashed, + *subvolume. In the current implementation, + *finding a linkto-file on non-hashed does not + *always implies that it is stale. So deletion + *of file should be done only when both fd is + *closed and linkto-xattr is set. In case of + *dict_set failure, avoid skipping of file. + *NOTE: dht_frame_return should get called for + * this block. + */ + + dict_unref(dict_req); + + } else { + gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_SUBVOL_INFO, + "attempting deletion of stale linkfile " + "%s on %s (hashed subvol is %s)", + loc->path, prev->name, + (local->hashed_subvol ? local->hashed_subvol->name + : "<null>")); + /* * + * These stale files may be created using root + * user. Hence deletion will work only with + * root. + */ + FRAME_SU_DO(frame, dht_local_t); + STACK_WIND(frame, dht_lookup_unlink_cbk, prev, + prev->fops->unlink, loc, 0, dict_req); + + dict_unref(dict_req); - if (local && (op_ret == 0)) { - prebuf->st_ino = local->st_ino; - postbuf->st_ino = local->st_ino; + return 0; + } } + } - this_call_cnt = dht_frame_return (frame); - if (is_last_call (this_call_cnt)) - DHT_STACK_UNWIND (fsync, frame, local->op_ret, local->op_errno, - prebuf, postbuf); + this_call_cnt = dht_frame_return(frame); + if (is_last_call(this_call_cnt)) { + dht_lookup_everywhere_done(frame, this); + } - return 0; +out: + return ret; } +int +dht_lookup_everywhere(call_frame_t *frame, xlator_t *this, loc_t *loc) +{ + dht_conf_t *conf = NULL; + dht_local_t *local = NULL; + int i = 0; + int call_cnt = 0; + + GF_VALIDATE_OR_GOTO("dht", frame, err); + GF_VALIDATE_OR_GOTO("dht", this, out); + GF_VALIDATE_OR_GOTO("dht", frame->local, out); + GF_VALIDATE_OR_GOTO("dht", this->private, out); + GF_VALIDATE_OR_GOTO("dht", loc, out); + + conf = this->private; + local = frame->local; + + call_cnt = conf->subvolume_cnt; + local->call_cnt = call_cnt; + if (!local->inode) + local->inode = inode_ref(loc->inode); + + gf_msg_debug(this->name, 0, "winding lookup call to %d subvols", call_cnt); + + for (i = 0; i < call_cnt; i++) { + STACK_WIND_COOKIE(frame, dht_lookup_everywhere_cbk, conf->subvolumes[i], + conf->subvolumes[i], + conf->subvolumes[i]->fops->lookup, loc, + local->xattr_req); + } + + return 0; +out: + DHT_STACK_UNWIND(lookup, frame, -1, EINVAL, NULL, NULL, NULL, NULL); +err: + return -1; +} int -dht_err_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno) +dht_lookup_linkfile_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, inode_t *inode, + struct iatt *stbuf, dict_t *xattr, + struct iatt *postparent) { - dht_local_t *local = NULL; - int this_call_cnt = 0; - call_frame_t *prev = NULL; + xlator_t *prev = NULL; + dht_local_t *local = NULL; + xlator_t *subvol = NULL; + loc_t *loc = NULL; + dht_conf_t *conf = NULL; + int ret = 0; + char gfid[GF_UUID_BUF_SIZE] = {0}; + + GF_VALIDATE_OR_GOTO("dht", frame, out); + GF_VALIDATE_OR_GOTO("dht", this, unwind); + GF_VALIDATE_OR_GOTO("dht", frame->local, unwind); + GF_VALIDATE_OR_GOTO("dht", this->private, unwind); + GF_VALIDATE_OR_GOTO("dht", cookie, unwind); + + prev = cookie; + subvol = prev; + conf = this->private; + local = frame->local; + loc = &local->loc; + + gf_uuid_unparse(loc->gfid, gfid); + + if (op_ret == -1) { + gf_msg(this->name, GF_LOG_INFO, op_errno, DHT_MSG_LINK_FILE_LOOKUP_INFO, + "Lookup of %s on %s (following linkfile) failed " + ",gfid = %s", + local->loc.path, subvol->name, gfid); + + /* If cached subvol returned ENOTCONN, do not do + lookup_everywhere. We need to make sure linkfile does not get + removed, which can take away the namespace, and subvol is + anyways down. */ + + local->cached_subvol = NULL; + if (op_errno != ENOTCONN) + goto err; + else + goto unwind; + } + + if (check_is_dir(inode, stbuf, xattr)) { + gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_LINK_FILE_LOOKUP_INFO, + "Lookup of %s on %s (following linkfile) reached dir," + " gfid = %s", + local->loc.path, subvol->name, gfid); + goto err; + } + + if (check_is_linkfile(inode, stbuf, xattr, conf->link_xattr_name)) { + gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_LINK_FILE_LOOKUP_INFO, + "lookup of %s on %s (following linkfile) reached link," + "gfid = %s", + local->loc.path, subvol->name, gfid); + goto err; + } + + if (gf_uuid_compare(local->gfid, stbuf->ia_gfid)) { + gf_msg(this->name, GF_LOG_WARNING, 0, DHT_MSG_GFID_MISMATCH, + "%s: gfid different on data file on %s," + " gfid local = %s, gfid node = %s ", + local->loc.path, subvol->name, gfid, uuid_utoa(stbuf->ia_gfid)); + goto err; + } + + if ((stbuf->ia_nlink == 1) && (conf && conf->unhashed_sticky_bit)) { + stbuf->ia_prot.sticky = 1; + } + + ret = dht_layout_preset(this, prev, inode); + if (ret < 0) { + gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_LAYOUT_PRESET_FAILED, + "Failed to set layout for subvolume %s," + "gfid = %s", + prev->name, gfid); + op_ret = -1; + op_errno = EINVAL; + } + + if (local->loc.parent) { + dht_inode_ctx_time_update(local->loc.parent, this, postparent, 1); + } +unwind: + DHT_STRIP_PHASE1_FLAGS(stbuf); + dht_set_fixed_dir_stat(postparent); + DHT_STACK_UNWIND(lookup, frame, op_ret, op_errno, inode, stbuf, xattr, + postparent); - local = frame->local; - prev = cookie; + return 0; - LOCK (&frame->lock); - { - if (op_ret == -1) { - local->op_errno = op_errno; - gf_log (this->name, GF_LOG_DEBUG, - "subvolume %s returned -1 (%s)", - prev->this->name, strerror (op_errno)); - goto unlock; - } +err: + dht_lookup_everywhere(frame, this, loc); +out: + return 0; +} - local->op_ret = 0; - } -unlock: - UNLOCK (&frame->lock); +/* Code to get hashed subvol based on inode and loc + First it check if loc->parent and loc->path exist then it get + hashed subvol based on loc. +*/ - this_call_cnt = dht_frame_return (frame); - if (is_last_call (this_call_cnt)) { - DHT_STACK_UNWIND (setxattr, frame, local->op_ret, local->op_errno); +static gf_boolean_t +dht_should_lookup_everywhere(xlator_t *this, dht_conf_t *conf, loc_t *loc) +{ + dht_layout_t *parent_layout = NULL; + int ret = 0; + gf_boolean_t lookup_everywhere = _gf_true; + + /* lookup-optimize supersedes lookup-unhashed settings. + * If it is set, do not process search_unhashed + * If lookup-optimize if enabled, lookup everywhere if: + * - this is the rebalance daemon. + * - loc->parent is unavailable. + * - parent_layout is unavailable + * - parent_layout->commit_hash != conf->vol_commit_hash + */ + + if (conf->lookup_optimize) { + if (!conf->defrag && loc->parent) { + ret = dht_inode_ctx_layout_get(loc->parent, this, &parent_layout); + if (!ret && parent_layout && + (parent_layout->commit_hash == conf->vol_commit_hash)) { + lookup_everywhere = _gf_false; + } } + goto out; + } else { + if (conf->search_unhashed == GF_DHT_LOOKUP_UNHASHED_AUTO) { + if (loc->parent) { + ret = dht_inode_ctx_layout_get(loc->parent, this, + &parent_layout); + if (ret || !parent_layout || + (!parent_layout->search_unhashed)) { + lookup_everywhere = _gf_false; + } + } else { + lookup_everywhere = _gf_false; + } - return 0; + goto out; + } + } +out: + return lookup_everywhere; } - int -dht_access (call_frame_t *frame, xlator_t *this, - loc_t *loc, int32_t mask) +dht_lookup_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, + int op_errno, inode_t *inode, struct iatt *stbuf, dict_t *xattr, + struct iatt *postparent) { - xlator_t *subvol = NULL; - int op_errno = -1; - dht_local_t *local = NULL; + char is_linkfile = 0; + char is_dir = 0; + xlator_t *subvol = NULL; + dht_conf_t *conf = NULL; + dht_local_t *local = NULL; + loc_t *loc = NULL; + xlator_t *prev = NULL; + int ret = 0; + uint32_t vol_commit_hash = 0; + + GF_VALIDATE_OR_GOTO("dht", frame, err); + GF_VALIDATE_OR_GOTO("dht", this, out); + GF_VALIDATE_OR_GOTO("dht", frame->local, out); + GF_VALIDATE_OR_GOTO("dht", cookie, out); + GF_VALIDATE_OR_GOTO("dht", this->private, out); + + conf = this->private; + + prev = cookie; + local = frame->local; + loc = &local->loc; + + gf_msg_debug(this->name, op_errno, + "%s: fresh_lookup on %s returned with op_ret %d", loc->path, + prev->name, op_ret); + + if (op_ret == -1) { + if (ENTRY_MISSING(op_ret, op_errno)) { + if (1 == conf->subvolume_cnt) { + /* No need to lookup again */ + goto out; + } + + gf_msg_debug(this->name, 0, "Entry %s missing on subvol %s", + loc->path, prev->name); + if (dht_should_lookup_everywhere(this, conf, loc)) { + local->op_errno = ENOENT; + dht_lookup_everywhere(frame, this, loc); + return 0; + } + + } else { + /* posix returns ENODATA if the gfid is not set but the client and + * server protocol layers do not send the stbuf. We need to + * heal this so check if this is a directory on the other subvols. + */ + if ((op_errno == ENOTCONN) || (op_errno == ENODATA)) { + dht_lookup_directory(frame, this, &local->loc); + return 0; + } + } + gf_msg_debug(this->name, op_errno, "%s: Lookup on subvolume %s failed", + loc->path, prev->name); + goto out; + } + + /* Lookup succeeded - op_ret = 0 */ + + /* This is required for handling stale linkfile deletion, + * or any more call which happens from this 'loc'. + */ + if (gf_uuid_is_null(local->gfid)) { + /*This is set from the first successful response*/ + memcpy(local->gfid, stbuf->ia_gfid, 16); + } + + if (!conf->vch_forced) { + /* Update the commit hash in conf if it is found */ + ret = dict_get_uint32(xattr, conf->commithash_xattr_name, + &vol_commit_hash); + if (ret == 0) { + conf->vol_commit_hash = vol_commit_hash; + } + } + + is_dir = check_is_dir(inode, stbuf, xattr); + if (is_dir) { + /* A directory is present on all subvols, send the lookup to + * all subvols now */ + local->inode = inode_ref(inode); + local->xattr = dict_ref(xattr); + dht_lookup_directory(frame, this, &local->loc); + return 0; + } - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (loc, err); - VALIDATE_OR_GOTO (loc->inode, err); - VALIDATE_OR_GOTO (loc->path, err); + is_linkfile = check_is_linkfile(inode, stbuf, xattr, conf->link_xattr_name); - subvol = dht_subvol_get_cached (this, loc->inode); - if (!subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no cached subvolume for path=%s", loc->path); - op_errno = EINVAL; - goto err; - } + if (!is_linkfile) { + /* non-directory and not a linkto file. This is a data file + * Update the layout to point to the cached subvol + */ - local = dht_local_init (frame); - if (!local) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } + ret = dht_layout_preset(this, prev, inode); + if (ret < 0) { + gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_LAYOUT_PRESET_FAILED, + "%s: could not set pre-set layout for subvolume %s", + loc->path, prev->name); + op_ret = -1; + op_errno = EINVAL; + goto out; + } + goto out; + } + + /* This is a linkto file. Get the value of the target subvol from the + * linkto xattr and lookup there to see if the file exists + */ + subvol = dht_linkfile_subvol(this, inode, stbuf, xattr); + if (!subvol) { + gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_SUBVOL_INFO, + "%s: No link subvol for linkto", loc->path); + dht_lookup_everywhere(frame, this, loc); + return 0; + } - local->call_cnt = 1; + gf_msg_debug(this->name, 0, "%s: Calling lookup on linkto target %s", + loc->path, subvol->name); - STACK_WIND (frame, dht_err_cbk, - subvol, subvol->fops->access, - loc, mask); + STACK_WIND_COOKIE(frame, dht_lookup_linkfile_cbk, subvol, subvol, + subvol->fops->lookup, &local->loc, local->xattr_req); - return 0; + return 0; +out: + /* + * FIXME: postparent->ia_size and postparent->st_blocks do not have + * correct values. since, postparent corresponds to a directory these + * two members should have values equal to sum of corresponding values + * from each of the subvolume. See dht_iatt_merge for reference. + */ + + if (!op_ret && local && local->loc.parent) { + dht_inode_ctx_time_update(local->loc.parent, this, postparent, 1); + } + + DHT_STRIP_PHASE1_FLAGS(stbuf); + dht_set_fixed_dir_stat(postparent); + DHT_STACK_UNWIND(lookup, frame, op_ret, op_errno, inode, stbuf, xattr, + postparent); err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (access, frame, -1, op_errno); + return 0; +} - return 0; +/* For directories, check if acl xattrs have been requested (by the acl + * xlator), if not, request for them. These xattrs are needed for dht dir + * self-heal to perform proper self-healing of dirs + */ +static void +dht_check_and_set_acl_xattr_req(xlator_t *this, dict_t *xattr_req) +{ + int ret = 0; + + GF_ASSERT(xattr_req); + + if (!dict_get(xattr_req, POSIX_ACL_ACCESS_XATTR)) { + ret = dict_set_int8(xattr_req, POSIX_ACL_ACCESS_XATTR, 0); + if (ret) + gf_msg(this->name, GF_LOG_WARNING, -ret, DHT_MSG_DICT_SET_FAILED, + "Failed to set dictionary value:key = %s", + POSIX_ACL_ACCESS_XATTR); + } + + if (!dict_get(xattr_req, POSIX_ACL_DEFAULT_XATTR)) { + ret = dict_set_int8(xattr_req, POSIX_ACL_DEFAULT_XATTR, 0); + if (ret) + gf_msg(this->name, GF_LOG_WARNING, -ret, DHT_MSG_DICT_SET_FAILED, + "Failed to set dictionary value:key = %s", + POSIX_ACL_DEFAULT_XATTR); + } + + return; } +/* for directories, we need the following info: + * the layout : trusted.glusterfs.dht + * the mds information : trusted.glusterfs.dht.mds + * the acl info: See above + */ +static int +dht_set_dir_xattr_req(xlator_t *this, loc_t *loc, dict_t *xattr_req) +{ + int ret = -EINVAL; + dht_conf_t *conf = NULL; + + conf = this->private; + if (!conf) { + goto err; + } + + if (!xattr_req) { + goto err; + } + + /* Xattr to get the layout for a directory + */ + ret = dict_set_uint32(xattr_req, conf->xattr_name, 4 * 4); + if (ret) { + gf_msg(this->name, GF_LOG_WARNING, ENOMEM, DHT_MSG_DICT_SET_FAILED, + "Failed to set dictionary value:key = %s for " + "path %s", + conf->xattr_name, loc->path); + goto err; + } + + /*Non-fatal failure */ + ret = dict_set_uint32(xattr_req, conf->mds_xattr_key, 4); + if (ret) { + gf_msg(this->name, GF_LOG_WARNING, ENOMEM, DHT_MSG_DICT_SET_FAILED, + "Failed to set dictionary value:key = %s for " + "path %s", + conf->mds_xattr_key, loc->path); + } + + dht_check_and_set_acl_xattr_req(this, xattr_req); + ret = 0; +err: + return ret; +} -int -dht_readlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno, const char *path, struct stat *sbuf) +/* If the hashed subvol is present, send the lookup to only that subvol first. + * If no hashed subvol, send a lookup to all subvols and proceed based on the + * responses. + */ +static int +dht_do_fresh_lookup(call_frame_t *frame, xlator_t *this, loc_t *loc) { - dht_local_t *local = NULL; + int ret = -1; + dht_conf_t *conf = NULL; + xlator_t *hashed_subvol = NULL; + dht_local_t *local = NULL; + int op_errno = -1; + int call_cnt = 0; + int i = 0; + + conf = this->private; + if (!conf) { + op_errno = EINVAL; + goto err; + } + + local = frame->local; + if (!local) { + op_errno = EINVAL; + goto err; + } + + /* Since we don't know whether this is a file or a directory, + * request all xattrs*/ + ret = dht_set_file_xattr_req(this, loc, local->xattr_req); + if (ret) { + op_errno = -ret; + goto err; + } + + ret = dht_set_dir_xattr_req(this, loc, local->xattr_req); + if (ret) { + op_errno = -ret; + goto err; + } + + /* Fuse sets a random value in gfid-req. If the gfid is missing + * on one or more subvols, posix will set the gfid to this value, + * causing GFID mismatches for directories. Remove the value fuse + * has sent before sending the lookup. + */ + ret = dict_get_gfuuid(local->xattr_req, "gfid-req", &local->gfid_req); + if (ret) { + gf_msg_debug(this->name, 0, "%s: No gfid-req available", loc->path); + } else { + dict_del(local->xattr_req, "gfid-req"); + } + /* This should have been set in dht_lookup */ + hashed_subvol = local->hashed_subvol; + + if (!hashed_subvol) { + gf_msg_debug(this->name, 0, + "%s: no subvolume in layout for path, " + "checking on all the subvols to see if " + "it is a directory", + loc->path); + + call_cnt = conf->subvolume_cnt; + local->call_cnt = call_cnt; - local = frame->local; - if (op_ret == -1) - goto err; + /* Allocate a layout. This will be populated and saved in + * the dht inode_ctx on successful lookup + */ + local->layout = dht_layout_new(this, conf->subvolume_cnt); + if (!local->layout) { + op_errno = ENOMEM; + goto err; + } - if (local) { - sbuf->st_ino = local->st_ino; - } else { - op_ret = -1; - op_errno = EINVAL; + gf_msg_debug(this->name, 0, + "%s: Found null hashed subvol. Calling lookup" + " on all nodes.", + loc->path); + + for (i = 0; i < call_cnt; i++) { + STACK_WIND_COOKIE(frame, dht_lookup_dir_cbk, conf->subvolumes[i], + conf->subvolumes[i], + conf->subvolumes[i]->fops->lookup, &local->loc, + local->xattr_req); } + return 0; + } + /* if the hashed_subvol is non-null, send the lookup there first so + * as to see whether we have a file or a directory */ + gf_msg_debug(this->name, 0, "%s: Calling fresh lookup on %s", loc->path, + hashed_subvol->name); + + STACK_WIND_COOKIE(frame, dht_lookup_cbk, hashed_subvol, hashed_subvol, + hashed_subvol->fops->lookup, loc, local->xattr_req); + return 0; err: - DHT_STACK_UNWIND (readlink, frame, op_ret, op_errno, path, sbuf); + op_errno = (op_errno == -1) ? errno : op_errno; + DHT_STACK_UNWIND(lookup, frame, -1, op_errno, NULL, NULL, NULL, NULL); + return 0; +} + +static int +dht_do_revalidate(call_frame_t *frame, xlator_t *this, loc_t *loc) +{ + xlator_t *subvol = NULL; + xlator_t *mds_subvol = NULL; + dht_local_t *local = NULL; + dht_conf_t *conf = NULL; + int ret = -1; + int op_errno = -1; + dht_layout_t *layout = NULL; + int i = 0; + int call_cnt = 0; + int gen = 0; + + conf = this->private; + if (!conf) { + op_errno = EINVAL; + goto err; + } + + local = frame->local; + if (!local) { + op_errno = EINVAL; + goto err; + } + + layout = local->layout; + if (!layout) { + gf_msg_debug(this->name, 0, + "path = %s. No layout found in the inode ctx.", loc->path); + op_errno = EINVAL; + goto err; + } + + /* Generation number has changed. This layout may be stale. */ + if (layout->gen && (layout->gen < conf->gen)) { + gen = layout->gen; + dht_layout_unref(this, local->layout); + local->layout = NULL; + local->cached_subvol = NULL; + + gf_msg_debug(this->name, 0, + "path = %s. In memory layout may be stale." + "(layout->gen (%d) is less than " + "conf->gen (%d)). Calling fresh lookup.", + loc->path, gen, conf->gen); + + dht_do_fresh_lookup(frame, this, loc); + return 0; + } + + local->inode = inode_ref(loc->inode); + + /* Since we don't know whether this has changed, + * request all xattrs*/ + ret = dht_set_file_xattr_req(this, loc, local->xattr_req); + if (ret) { + op_errno = -ret; + goto err; + } + + ret = dht_set_dir_xattr_req(this, loc, local->xattr_req); + if (ret) { + op_errno = -ret; + goto err; + } + + if (IA_ISDIR(local->inode->ia_type)) { + ret = dht_inode_ctx_mdsvol_get(local->inode, this, &mds_subvol); + if (ret || !mds_subvol) { + gf_msg_debug(this->name, 0, "path = %s. No mds subvol in inode ctx", + local->loc.path); + } + local->mds_subvol = mds_subvol; + local->call_cnt = conf->subvolume_cnt; + /* local->call_cnt will change as responses are processed. Always use a + * local copy to loop through the STACK_WIND calls + */ + + call_cnt = local->call_cnt; + + for (i = 0; i < call_cnt; i++) { + STACK_WIND_COOKIE(frame, dht_revalidate_cbk, conf->subvolumes[i], + conf->subvolumes[i], + conf->subvolumes[i]->fops->lookup, loc, + local->xattr_req); + } return 0; + } + + /* If not a dir, this should be 1 */ + local->call_cnt = layout->cnt; + call_cnt = local->call_cnt; + + for (i = 0; i < call_cnt; i++) { + subvol = layout->list[i].xlator; + + gf_msg_debug(this->name, 0, + "path = %s. Calling " + "revalidate lookup on %s", + loc->path, subvol->name); + + STACK_WIND_COOKIE(frame, dht_revalidate_cbk, subvol, subvol, + subvol->fops->lookup, &local->loc, local->xattr_req); + } + return 0; +err: + op_errno = (op_errno == -1) ? errno : op_errno; + DHT_STACK_UNWIND(lookup, frame, -1, op_errno, NULL, NULL, NULL, NULL); + return 0; } +/* Depending on the input, decide if this is a: + * fresh-lookup: loc->name is provided but no dht inode ctx + * revalidation: loc->name is provided, dht inode ctx is present + * discover: gfid based nameless lookup. + */ int -dht_readlink (call_frame_t *frame, xlator_t *this, - loc_t *loc, size_t size) -{ - xlator_t *subvol = NULL; - int op_errno = -1; - dht_local_t *local = NULL; - - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (loc, err); - VALIDATE_OR_GOTO (loc->inode, err); - VALIDATE_OR_GOTO (loc->path, err); - - subvol = dht_subvol_get_cached (this, loc->inode); - if (!subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no cached subvolume for path=%s", loc->path); - op_errno = EINVAL; - goto err; - } - - local = dht_local_init (frame); - if (!local) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } - - local->st_ino = loc->inode->ino; - - STACK_WIND (frame, dht_readlink_cbk, - subvol, subvol->fops->readlink, - loc, size); - - return 0; +dht_lookup(call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xattr_req) +{ + xlator_t *hashed_subvol = NULL; + dht_local_t *local = NULL; + dht_conf_t *conf = NULL; + int ret = -1; + int op_errno = -1; + loc_t new_loc = { + 0, + }; + + VALIDATE_OR_GOTO(frame, err); + VALIDATE_OR_GOTO(this, err); + VALIDATE_OR_GOTO(loc, err); + VALIDATE_OR_GOTO(loc->inode, err); + + conf = this->private; + if (!conf) + goto err; + + local = dht_local_init(frame, loc, NULL, GF_FOP_LOOKUP); + if (!local) { + op_errno = ENOMEM; + goto err; + } + + ret = dht_filter_loc_subvol_key(this, loc, &new_loc, &hashed_subvol); + if (ret) { + loc_wipe(&local->loc); + ret = loc_dup(&new_loc, &local->loc); + + /* we no longer need 'new_loc' entries */ + loc_wipe(&new_loc); + + /* check if loc_dup() is successful */ + if (ret == -1) { + op_errno = errno; + gf_msg_debug(this->name, errno, + "copying location failed for path=%s", loc->path); + goto err; + } + } + + if (xattr_req) { + local->xattr_req = dict_ref(xattr_req); + } else { + local->xattr_req = dict_new(); + } + + /* Nameless lookup */ + + /* This is usually sent by NFS. Lookups are done based on the gfid and + * no name information is available. Without the name, dht cannot calculate + * the hash and has to send a lookup to all subvols. + */ + if (gf_uuid_is_null(loc->pargfid) && !gf_uuid_is_null(loc->gfid) && + !__is_root_gfid(loc->inode->gfid)) { + local->cached_subvol = NULL; + dht_do_discover(frame, this, loc); + return 0; + } + + if (loc_is_root(loc)) { + /* Request the DHT commit hash xattr (trusted.glusterfs.dht.commithash) + * set on the brick root. + */ + ret = dict_set_uint32(local->xattr_req, conf->commithash_xattr_name, + sizeof(uint32_t)); + } + + if (!hashed_subvol) + hashed_subvol = dht_subvol_get_hashed(this, loc); + local->hashed_subvol = hashed_subvol; + + if (is_revalidate(loc)) { + /* The entry has been looked up before and has a dht inode_ctx + */ + dht_do_revalidate(frame, this, loc); + return 0; + } else { + /* Entry has not been looked up before + */ + dht_do_fresh_lookup(frame, this, loc); + return 0; + } + return 0; err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (readlink, frame, -1, op_errno, NULL, NULL); - - return 0; + op_errno = (op_errno == -1) ? errno : op_errno; + DHT_STACK_UNWIND(lookup, frame, -1, op_errno, NULL, NULL, NULL, NULL); + return 0; } +static int +dht_unlink_linkfile_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, struct iatt *preparent, + struct iatt *postparent, dict_t *xdata) +{ + dht_local_t *local = NULL; + xlator_t *prev = NULL; + + local = frame->local; + prev = cookie; + + LOCK(&frame->lock); + { + if ((op_ret == -1) && + !((op_errno == ENOENT) || (op_errno == ENOTCONN))) { + local->op_errno = op_errno; + UNLOCK(&frame->lock); + gf_msg_debug(this->name, op_errno, + "Unlink link: subvolume %s returned -1", prev->name); + goto post_unlock; + } + + local->op_ret = 0; + } + UNLOCK(&frame->lock); +post_unlock: + dht_set_fixed_dir_stat(&local->preparent); + dht_set_fixed_dir_stat(&local->postparent); + DHT_STACK_UNWIND(unlink, frame, local->op_ret, local->op_errno, + &local->preparent, &local->postparent, xdata); -int -dht_getxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno, dict_t *xattr) + return 0; +} + +static int +dht_unlink_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, + int op_errno, struct iatt *preparent, struct iatt *postparent, + dict_t *xdata) { - if (op_ret != -1) { - if (dict_get (xattr, "trusted.glusterfs.dht")) { - dict_del (xattr, "trusted.glusterfs.dht"); - } + dht_local_t *local = NULL; + xlator_t *prev = NULL; + xlator_t *hashed_subvol = NULL; + + local = frame->local; + prev = cookie; + + LOCK(&frame->lock); + { + if (op_ret == -1) { + if (op_errno != ENOENT) { + local->op_ret = -1; + local->op_errno = op_errno; + } else { + local->op_ret = 0; + } + UNLOCK(&frame->lock); + gf_msg_debug(this->name, op_errno, + "Unlink: subvolume %s returned -1", prev->name); + goto post_unlock; } - DHT_STACK_UNWIND (getxattr, frame, op_ret, op_errno, xattr); + local->op_ret = 0; - return 0; + local->postparent = *postparent; + local->preparent = *preparent; + + if (local->loc.parent) { + dht_inode_ctx_time_update(local->loc.parent, this, + &local->preparent, 0); + dht_inode_ctx_time_update(local->loc.parent, this, + &local->postparent, 1); + } + } + UNLOCK(&frame->lock); +post_unlock: + if (!local->op_ret) { + hashed_subvol = dht_subvol_get_hashed(this, &local->loc); + if (hashed_subvol && hashed_subvol != local->cached_subvol) { + /* + * If hashed and cached are different, then we need + * to unlink linkfile from hashed subvol if data + * file is deleted successfully + */ + STACK_WIND_COOKIE(frame, dht_unlink_linkfile_cbk, hashed_subvol, + hashed_subvol, hashed_subvol->fops->unlink, + &local->loc, local->flags, xdata); + return 0; + } + } + + dht_set_fixed_dir_stat(&local->preparent); + dht_set_fixed_dir_stat(&local->postparent); + DHT_STACK_UNWIND(unlink, frame, local->op_ret, local->op_errno, + &local->preparent, &local->postparent, xdata); + + return 0; } +static int +dht_common_setxattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, dict_t *xdata) +{ + DHT_STACK_UNWIND(setxattr, frame, op_ret, op_errno, xdata); + return 0; +} -int -dht_getxattr (call_frame_t *frame, xlator_t *this, - loc_t *loc, const char *key) +static int +dht_fix_layout_setxattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, dict_t *xdata) { - xlator_t *subvol = NULL; - int op_errno = -1; + dht_local_t *local = NULL; + dht_layout_t *layout = NULL; + if (op_ret == 0) { + /* update the layout in the inode ctx */ + local = frame->local; + layout = local->selfheal.layout; - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (loc, err); - VALIDATE_OR_GOTO (loc->inode, err); - VALIDATE_OR_GOTO (loc->path, err); + dht_layout_set(this, local->loc.inode, layout); + } - subvol = dht_subvol_get_cached (this, loc->inode); - if (!subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no cached subvolume for path=%s", loc->path); - op_errno = EINVAL; - goto err; - } + DHT_STACK_UNWIND(setxattr, frame, op_ret, op_errno, xdata); + return 0; +} - STACK_WIND (frame, dht_getxattr_cbk, - subvol, subvol->fops->getxattr, - loc, key); +static int +dht_err_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, + int op_errno, dict_t *xdata) +{ + dht_local_t *local = NULL; + int this_call_cnt = 0; + xlator_t *prev = NULL; - return 0; + local = frame->local; + prev = cookie; -err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (getxattr, frame, -1, op_errno, NULL); + LOCK(&frame->lock); + { + if (op_ret == -1) { + local->op_errno = op_errno; + UNLOCK(&frame->lock); + gf_msg_debug(this->name, op_errno, "subvolume %s returned -1", + prev->name); + goto post_unlock; + } - return 0; + local->op_ret = 0; + } + UNLOCK(&frame->lock); +post_unlock: + this_call_cnt = dht_frame_return(frame); + if (is_last_call(this_call_cnt)) { + if ((local->fop == GF_FOP_SETXATTR) || + (local->fop == GF_FOP_FSETXATTR)) { + DHT_STACK_UNWIND(setxattr, frame, local->op_ret, local->op_errno, + NULL); + /* 'local' itself may not be valid after this */ + goto out; + } + if ((local->fop == GF_FOP_REMOVEXATTR) || + (local->fop == GF_FOP_FREMOVEXATTR)) { + DHT_STACK_UNWIND(removexattr, frame, local->op_ret, local->op_errno, + NULL); + } + } + +out: + return 0; } +/* Set the value[] of key into dict after convert from + host byte order to network byte order +*/ +int32_t +dht_dict_set_array(dict_t *dict, char *key, int32_t value[], int32_t size) +{ + int ret = -1; + int32_t *ptr = NULL; + int32_t vindex; + + if (value == NULL) { + return -EINVAL; + } + + ptr = GF_MALLOC(sizeof(int32_t) * size, gf_common_mt_char); + if (ptr == NULL) { + return -ENOMEM; + } + for (vindex = 0; vindex < size; vindex++) { + ptr[vindex] = hton32(value[vindex]); + } + ret = dict_set_bin(dict, key, ptr, sizeof(int32_t) * size); + if (ret) + GF_FREE(ptr); + return ret; +} -int -dht_setxattr (call_frame_t *frame, xlator_t *this, - loc_t *loc, dict_t *xattr, int flags) +static int +dht_common_mds_xattrop_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, dict_t *dict, + dict_t *xdata) { - xlator_t *subvol = NULL; - int op_errno = -1; - dht_local_t *local = NULL; + dht_local_t *local = NULL; + call_frame_t *prev = cookie; + local = frame->local; - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (loc, err); - VALIDATE_OR_GOTO (loc->inode, err); - VALIDATE_OR_GOTO (loc->path, err); + if (op_ret) + gf_msg_debug(this->name, op_errno, "subvolume %s returned -1", + prev->this->name); - subvol = dht_subvol_get_cached (this, loc->inode); - if (!subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no cached subvolume for path=%s", loc->path); - op_errno = EINVAL; - goto err; - } + if (local->fop == GF_FOP_SETXATTR) { + DHT_STACK_UNWIND(setxattr, frame, 0, op_errno, local->xdata); + /* 'local' itself may not be valid after this */ + goto out; + } - local = dht_local_init (frame); - if (!local) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } + if (local->fop == GF_FOP_FSETXATTR) { + DHT_STACK_UNWIND(fsetxattr, frame, 0, op_errno, local->xdata); + /* 'local' itself may not be valid after this */ + goto out; + } - local->call_cnt = 1; + if (local->fop == GF_FOP_REMOVEXATTR) { + DHT_STACK_UNWIND(removexattr, frame, 0, op_errno, NULL); + /* 'local' itself may not be valid after this */ + goto out; + } - STACK_WIND (frame, dht_err_cbk, - subvol, subvol->fops->setxattr, - loc, xattr, flags); + if (local->fop == GF_FOP_FREMOVEXATTR) { + DHT_STACK_UNWIND(fremovexattr, frame, 0, op_errno, NULL); + } - return 0; +out: + return 0; +} -err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (setxattr, frame, -1, op_errno); +/* Code to wind a xattrop call to add 1 on current mds internal xattr + value +*/ +static int +dht_setxattr_non_mds_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, dict_t *xdata) +{ + dht_local_t *local = NULL; + int this_call_cnt = 0; + int ret = 0; + dict_t *xattrop = NULL; + int32_t addone[1] = {1}; + call_frame_t *prev = NULL; + dht_conf_t *conf = NULL; + + local = frame->local; + prev = cookie; + conf = this->private; + + LOCK(&frame->lock); + { + if (op_ret && !local->op_ret) { + local->op_ret = op_ret; + local->op_errno = op_errno; + UNLOCK(&frame->lock); + gf_msg_debug(this->name, op_errno, "subvolume %s returned -1", + prev->this->name); + goto post_unlock; + } + } + UNLOCK(&frame->lock); +post_unlock: + this_call_cnt = dht_frame_return(frame); + + if (is_last_call(this_call_cnt)) { + if (!local->op_ret) { + xattrop = dict_new(); + if (!xattrop) { + gf_msg(this->name, GF_LOG_ERROR, DHT_MSG_NO_MEMORY, 0, + "dictionary creation failed"); + ret = -1; + goto out; + } + ret = dht_dict_set_array(xattrop, conf->mds_xattr_key, addone, 1); + if (ret != 0) { + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_DICT_SET_FAILED, + "dictionary set array failed "); + ret = -1; + goto out; + } + if ((local->fop == GF_FOP_SETXATTR) || + (local->fop == GF_FOP_REMOVEXATTR)) { + STACK_WIND(frame, dht_common_mds_xattrop_cbk, local->mds_subvol, + local->mds_subvol->fops->xattrop, &local->loc, + GF_XATTROP_ADD_ARRAY, xattrop, NULL); + } else { + STACK_WIND(frame, dht_common_mds_xattrop_cbk, local->mds_subvol, + local->mds_subvol->fops->fxattrop, local->fd, + GF_XATTROP_ADD_ARRAY, xattrop, NULL); + } + } else { + if (local->fop == GF_FOP_SETXATTR) { + DHT_STACK_UNWIND(setxattr, frame, 0, 0, local->xdata); + /* 'local' itself may not be valid after this */ + goto just_return; + } + + if (local->fop == GF_FOP_FSETXATTR) { + DHT_STACK_UNWIND(fsetxattr, frame, 0, 0, local->xdata); + /* 'local' itself may not be valid after this */ + goto just_return; + } + + if (local->fop == GF_FOP_REMOVEXATTR) { + DHT_STACK_UNWIND(removexattr, frame, 0, 0, NULL); + /* 'local' itself may not be valid after this */ + goto just_return; + } + + if (local->fop == GF_FOP_FREMOVEXATTR) { + DHT_STACK_UNWIND(fremovexattr, frame, 0, 0, NULL); + /* 'local' itself may not be valid after this */ + goto just_return; + } + } + } +out: + if (ret) { + if (local->fop == GF_FOP_SETXATTR) { + DHT_STACK_UNWIND(setxattr, frame, 0, 0, local->xdata); + /* 'local' itself may not be valid after this */ + goto just_return; + } - return 0; -} + if (local->fop == GF_FOP_FSETXATTR) { + DHT_STACK_UNWIND(fsetxattr, frame, 0, 0, local->xdata); + /* 'local' itself may not be valid after this */ + goto just_return; + } + + if (local->fop == GF_FOP_REMOVEXATTR) { + DHT_STACK_UNWIND(removexattr, frame, 0, 0, NULL); + /* 'local' itself may not be valid after this */ + goto just_return; + } + if (local->fop == GF_FOP_FREMOVEXATTR) { + DHT_STACK_UNWIND(fremovexattr, frame, 0, 0, NULL); + } + } +just_return: + if (xattrop) + dict_unref(xattrop); + return 0; +} -int -dht_removexattr (call_frame_t *frame, xlator_t *this, - loc_t *loc, const char *key) +static int +dht_setxattr_mds_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, dict_t *xdata) { - xlator_t *subvol = NULL; - int op_errno = -1; - dht_local_t *local = NULL; + dht_local_t *local = NULL; + dht_conf_t *conf = NULL; + call_frame_t *prev = NULL; + xlator_t *mds_subvol = NULL; + int i = 0; + + local = frame->local; + prev = cookie; + conf = this->private; + mds_subvol = local->mds_subvol; + + if (op_ret == -1) { + local->op_ret = op_ret; + local->op_errno = op_errno; + gf_msg_debug(this->name, op_errno, "subvolume %s returned -1", + prev->this->name); + goto out; + } + + local->op_ret = 0; + local->call_cnt = conf->subvolume_cnt - 1; + local->xdata = dict_ref(xdata); + + for (i = 0; i < conf->subvolume_cnt; i++) { + if (mds_subvol && (mds_subvol == conf->subvolumes[i])) + continue; + if (local->fop == GF_FOP_SETXATTR) { + STACK_WIND(frame, dht_setxattr_non_mds_cbk, conf->subvolumes[i], + conf->subvolumes[i]->fops->setxattr, &local->loc, + local->xattr, local->flags, local->xattr_req); + } + if (local->fop == GF_FOP_FSETXATTR) { + STACK_WIND(frame, dht_setxattr_non_mds_cbk, conf->subvolumes[i], + conf->subvolumes[i]->fops->fsetxattr, local->fd, + local->xattr, local->flags, local->xattr_req); + } - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (loc, err); - VALIDATE_OR_GOTO (loc->inode, err); - VALIDATE_OR_GOTO (loc->path, err); + if (local->fop == GF_FOP_REMOVEXATTR) { + STACK_WIND(frame, dht_setxattr_non_mds_cbk, conf->subvolumes[i], + conf->subvolumes[i]->fops->removexattr, &local->loc, + local->key, local->xattr_req); + } - subvol = dht_subvol_get_cached (this, loc->inode); - if (!subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no cached subvolume for path=%s", loc->path); - op_errno = EINVAL; - goto err; - } + if (local->fop == GF_FOP_FREMOVEXATTR) { + STACK_WIND(frame, dht_setxattr_non_mds_cbk, conf->subvolumes[i], + conf->subvolumes[i]->fops->fremovexattr, local->fd, + local->key, local->xattr_req); + } + } - local = dht_local_init (frame); - if (!local) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } + return 0; +out: + if (local->fop == GF_FOP_SETXATTR) { + DHT_STACK_UNWIND(setxattr, frame, local->op_ret, local->op_errno, + xdata); + /* 'local' itself may not be valid after this */ + goto just_return; + } + + if (local->fop == GF_FOP_FSETXATTR) { + DHT_STACK_UNWIND(fsetxattr, frame, local->op_ret, local->op_errno, + xdata); + /* 'local' itself may not be valid after this */ + goto just_return; + } + + if (local->fop == GF_FOP_REMOVEXATTR) { + DHT_STACK_UNWIND(removexattr, frame, local->op_ret, local->op_errno, + NULL); + /* 'local' itself may not be valid after this */ + goto just_return; + } + + if (local->fop == GF_FOP_FREMOVEXATTR) { + DHT_STACK_UNWIND(fremovexattr, frame, local->op_ret, local->op_errno, + NULL); + } + +just_return: + return 0; +} - local->call_cnt = 1; +static int +dht_xattrop_mds_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, dict_t *dict, dict_t *xdata) +{ + dht_local_t *local = NULL; + call_frame_t *prev = NULL; + + local = frame->local; + prev = cookie; + + if (op_ret == -1) { + local->op_errno = op_errno; + local->op_ret = op_ret; + gf_msg_debug(this->name, op_errno, "subvolume %s returned -1", + prev->this->name); + goto out; + } + + if (local->fop == GF_FOP_SETXATTR) { + STACK_WIND(frame, dht_setxattr_mds_cbk, local->mds_subvol, + local->mds_subvol->fops->setxattr, &local->loc, local->xattr, + local->flags, local->xattr_req); + } + + if (local->fop == GF_FOP_FSETXATTR) { + STACK_WIND(frame, dht_setxattr_mds_cbk, local->mds_subvol, + local->mds_subvol->fops->fsetxattr, local->fd, local->xattr, + local->flags, local->xattr_req); + } + + if (local->fop == GF_FOP_REMOVEXATTR) { + STACK_WIND(frame, dht_setxattr_mds_cbk, local->mds_subvol, + local->mds_subvol->fops->removexattr, &local->loc, + local->key, local->xattr_req); + } + + if (local->fop == GF_FOP_FREMOVEXATTR) { + STACK_WIND(frame, dht_setxattr_mds_cbk, local->mds_subvol, + local->mds_subvol->fops->fremovexattr, local->fd, local->key, + local->xattr_req); + } + + return 0; +out: + if (local->fop == GF_FOP_SETXATTR) { + DHT_STACK_UNWIND(setxattr, frame, local->op_ret, local->op_errno, + xdata); + /* 'local' itself may not be valid after this */ + goto just_return; + } + + if (local->fop == GF_FOP_FSETXATTR) { + DHT_STACK_UNWIND(fsetxattr, frame, local->op_ret, local->op_errno, + xdata); + /* 'local' itself may not be valid after this */ + goto just_return; + } + + if (local->fop == GF_FOP_REMOVEXATTR) { + DHT_STACK_UNWIND(removexattr, frame, local->op_ret, local->op_errno, + NULL); + /* 'local' itself may not be valid after this */ + goto just_return; + } + + if (local->fop == GF_FOP_FREMOVEXATTR) { + DHT_STACK_UNWIND(fremovexattr, frame, local->op_ret, local->op_errno, + NULL); + } + +just_return: + return 0; +} + +static void +fill_layout_info(dht_layout_t *layout, char *buf) +{ + int i = 0; + char tmp_buf[128] = { + 0, + }; + + for (i = 0; i < layout->cnt; i++) { + snprintf(tmp_buf, sizeof(tmp_buf), "(%s %u %u)", + layout->list[i].xlator->name, layout->list[i].start, + layout->list[i].stop); + if (i) + strcat(buf, " "); + strcat(buf, tmp_buf); + } +} - STACK_WIND (frame, dht_err_cbk, - subvol, subvol->fops->removexattr, - loc, key); +static void +dht_fill_pathinfo_xattr(xlator_t *this, dht_local_t *local, char *xattr_buf, + int32_t alloc_len, int flag, char *layout_buf) +{ + if (flag) { + if (local->xattr_val) { + snprintf(xattr_buf, alloc_len, + "((<" DHT_PATHINFO_HEADER "%s> %s) (%s-layout %s))", + this->name, local->xattr_val, this->name, layout_buf); + } else { + snprintf(xattr_buf, alloc_len, "(%s-layout %s)", this->name, + layout_buf); + } + } else if (local->xattr_val) { + snprintf(xattr_buf, alloc_len, "(<" DHT_PATHINFO_HEADER "%s> %s)", + this->name, local->xattr_val); + } else { + xattr_buf[0] = '\0'; + } +} - return 0; +static int +dht_vgetxattr_alloc_and_fill(dht_local_t *local, dict_t *xattr, xlator_t *this, + int op_errno) +{ + int ret = -1; + char *value = NULL; + + ret = dict_get_str(xattr, local->xsel, &value); + if (ret) { + gf_msg(this->name, GF_LOG_ERROR, op_errno, DHT_MSG_GET_XATTR_FAILED, + "Subvolume %s returned -1", this->name); + local->op_ret = -1; + local->op_errno = op_errno; + goto out; + } + + local->alloc_len += strlen(value); + + if (!local->xattr_val) { + local->alloc_len += (SLEN(DHT_PATHINFO_HEADER) + 10); + local->xattr_val = GF_MALLOC(local->alloc_len, gf_common_mt_char); + if (!local->xattr_val) { + ret = -1; + goto out; + } + local->xattr_val[0] = '\0'; + } + + int plen = strlen(local->xattr_val); + if (plen) { + /* extra byte(s) for \0 to be safe */ + local->alloc_len += (plen + 2); + local->xattr_val = GF_REALLOC(local->xattr_val, local->alloc_len); + if (!local->xattr_val) { + ret = -1; + goto out; + } + } -err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (removexattr, frame, -1, op_errno); + (void)strcat(local->xattr_val, value); + (void)strcat(local->xattr_val, " "); + local->op_ret = 0; - return 0; + ret = 0; + +out: + return ret; } +static int +dht_vgetxattr_fill_and_set(dht_local_t *local, dict_t **dict, xlator_t *this, + gf_boolean_t flag) +{ + int ret = -1; + char *xattr_buf = NULL; + char layout_buf[8192] = { + 0, + }; + + if (flag) + fill_layout_info(local->layout, layout_buf); + + *dict = dict_new(); + if (!*dict) + goto out; + + local->xattr_val[strlen(local->xattr_val) - 1] = '\0'; + + /* we would need max this many bytes to create xattr string + * extra 40 bytes is just an estimated amount of additional + * space required as we include translator name and some + * spaces, brackets etc. when forming the pathinfo string. + * + * For node-uuid we just don't have all the pretty formatting, + * but since this is a generic routine for pathinfo & node-uuid + * we don't have conditional space allocation and try to be + * generic + */ + local->alloc_len += (2 * strlen(this->name)) + strlen(layout_buf) + 40; + xattr_buf = GF_MALLOC(local->alloc_len, gf_common_mt_char); + if (!xattr_buf) + goto out; + + if (XATTR_IS_PATHINFO(local->xsel)) { + (void)dht_fill_pathinfo_xattr(this, local, xattr_buf, local->alloc_len, + flag, layout_buf); + } else if ((XATTR_IS_NODE_UUID(local->xsel)) || + (XATTR_IS_NODE_UUID_LIST(local->xsel))) { + (void)snprintf(xattr_buf, local->alloc_len, "%s", local->xattr_val); + } else { + gf_msg(this->name, GF_LOG_WARNING, 0, DHT_MSG_GET_XATTR_FAILED, + "Unknown local->xsel (%s)", local->xsel); + GF_FREE(xattr_buf); + goto out; + } + + ret = dict_set_dynstr(*dict, local->xsel, xattr_buf); + if (ret) + GF_FREE(xattr_buf); + GF_FREE(local->xattr_val); -int -dht_fd_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno, fd_t *fd) +out: + return ret; +} + +static int +dht_find_local_subvol_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, dict_t *xattr, + dict_t *xdata) { - dht_local_t *local = NULL; - int this_call_cnt = 0; - call_frame_t *prev = NULL; + dht_local_t *local = NULL; + dht_conf_t *conf = NULL; + xlator_t *prev = NULL; + int this_call_cnt = 0; + int ret = 0; + char *uuid_str = NULL; + char *uuid_list = NULL; + char *next_uuid_str = NULL; + char *saveptr = NULL; + uuid_t node_uuid = { + 0, + }; + char *uuid_list_copy = NULL; + int count = 0; + int i = 0; + int index = 0; + int found = 0; + nodeuuid_info_t *tmp_ptr = NULL; + + VALIDATE_OR_GOTO(frame, out); + VALIDATE_OR_GOTO(frame->local, out); + + local = frame->local; + prev = cookie; + conf = this->private; + + VALIDATE_OR_GOTO(conf->defrag, out); + + gf_msg_debug(this->name, 0, "subvol %s returned", prev->name); + + LOCK(&frame->lock); + { + this_call_cnt = --local->call_cnt; + if (op_ret < 0) { + local->op_ret = -1; + local->op_errno = op_errno; + UNLOCK(&frame->lock); + if (op_errno == ENODATA) + gf_msg_debug(this->name, 0, "failed to get node-uuid"); + else + gf_msg(this->name, GF_LOG_ERROR, op_errno, + DHT_MSG_GET_XATTR_FAILED, "failed to get node-uuid"); + goto post_unlock; + } + + ret = dict_get_str(xattr, local->xsel, &uuid_list); + + if (ret < 0) { + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_DICT_GET_FAILED, + "Failed to get %s", local->xsel); + local->op_ret = -1; + local->op_errno = EINVAL; + goto unlock; + } + /* As DHT will not know details of its child xlators + * we need to parse this twice to get the count first + * and allocate memory later. + */ + count = 0; + index = conf->local_subvols_cnt; + + uuid_list_copy = gf_strdup(uuid_list); + if (!uuid_list_copy) + goto unlock; + + for (uuid_str = strtok_r(uuid_list, " ", &saveptr); uuid_str; + uuid_str = next_uuid_str) { + next_uuid_str = strtok_r(NULL, " ", &saveptr); + if (gf_uuid_parse(uuid_str, node_uuid)) { + local->op_ret = -1; + local->op_errno = EINVAL; + UNLOCK(&frame->lock); + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_UUID_PARSE_ERROR, + "Failed to parse uuid for %s", prev->name); + goto post_unlock; + } + + count++; + if (gf_uuid_compare(node_uuid, conf->defrag->node_uuid)) { + gf_msg_debug(this->name, 0, + "subvol %s does not" + "belong to this node", + prev->name); + } else { + /* handle multiple bricks of the same replica + * on the same node */ + if (found) + continue; + conf->local_subvols[(conf->local_subvols_cnt)++] = prev; + found = 1; + gf_msg_debug(this->name, 0, + "subvol %s belongs to" + " this node", + prev->name); + } + } - local = frame->local; - prev = cookie; + if (!found) { + local->op_ret = 0; + goto unlock; + } - LOCK (&frame->lock); - { - if (op_ret == -1) { - local->op_errno = op_errno; - gf_log (this->name, GF_LOG_DEBUG, - "subvolume %s returned -1 (%s)", - prev->this->name, strerror (op_errno)); - goto unlock; - } + conf->local_nodeuuids[index].count = count; + conf->local_nodeuuids[index].elements = GF_CALLOC( + count, sizeof(nodeuuid_info_t), 1); + + /* The node-uuids are guaranteed to be returned in the same + * order as the bricks + * A null node-uuid is returned for a brick that is down. + */ + + saveptr = NULL; + i = 0; + + for (uuid_str = strtok_r(uuid_list_copy, " ", &saveptr); uuid_str; + uuid_str = next_uuid_str) { + next_uuid_str = strtok_r(NULL, " ", &saveptr); + tmp_ptr = &(conf->local_nodeuuids[index].elements[i]); + gf_uuid_parse(uuid_str, tmp_ptr->uuid); + + if (!gf_uuid_compare(tmp_ptr->uuid, conf->defrag->node_uuid)) { + tmp_ptr->info = REBAL_NODEUUID_MINE; + } + i++; + tmp_ptr = NULL; + } + } - local->op_ret = 0; - } + local->op_ret = 0; unlock: - UNLOCK (&frame->lock); + UNLOCK(&frame->lock); +post_unlock: + if (!is_last_call(this_call_cnt)) + goto out; - this_call_cnt = dht_frame_return (frame); - if (is_last_call (this_call_cnt)) - DHT_STACK_UNWIND (open, frame, local->op_ret, local->op_errno, - local->fd); + if (local->op_ret == -1) { + goto unwind; + } - return 0; + DHT_STACK_UNWIND(getxattr, frame, 0, 0, xattr, xdata); + goto out; + +unwind: + + GF_FREE(conf->local_nodeuuids[index].elements); + conf->local_nodeuuids[index].elements = NULL; + + DHT_STACK_UNWIND(getxattr, frame, -1, local->op_errno, NULL, xdata); +out: + GF_FREE(uuid_list_copy); + return 0; } +static int +dht_vgetxattr_dir_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, dict_t *xattr, dict_t *xdata) +{ + int ret = 0; + dht_local_t *local = NULL; + int this_call_cnt = 0; + dict_t *dict = NULL; + + VALIDATE_OR_GOTO(frame, out); + VALIDATE_OR_GOTO(frame->local, out); -int -dht_open (call_frame_t *frame, xlator_t *this, - loc_t *loc, int flags, fd_t *fd, int wbflags) -{ - xlator_t *subvol = NULL; - int ret = -1; - int op_errno = -1; - dht_local_t *local = NULL; - - - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (fd, err); - - subvol = dht_subvol_get_cached (this, fd->inode); - if (!subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no cached subvolume for fd=%p", fd); - op_errno = EINVAL; - goto err; - } - - local = dht_local_init (frame); - if (!local) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } - - local->fd = fd_ref (fd); - ret = loc_dup (loc, &local->loc); - if (ret == -1) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } - - local->call_cnt = 1; - - STACK_WIND (frame, dht_fd_cbk, - subvol, subvol->fops->open, - loc, flags, fd, wbflags); - - return 0; + local = frame->local; -err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (open, frame, -1, op_errno, NULL); + LOCK(&frame->lock); + { + this_call_cnt = --local->call_cnt; + if (op_ret < 0) { + if (op_errno != ENOTCONN) { + local->op_ret = -1; + local->op_errno = op_errno; + UNLOCK(&frame->lock); + gf_msg(this->name, GF_LOG_ERROR, op_errno, + DHT_MSG_GET_XATTR_FAILED, "getxattr err for dir"); + goto post_unlock; + } + + goto unlock; + } + + ret = dht_vgetxattr_alloc_and_fill(local, xattr, this, op_errno); + if (ret) { + UNLOCK(&frame->lock); + gf_msg(this->name, GF_LOG_ERROR, op_errno, DHT_MSG_DICT_SET_FAILED, + "alloc or fill failure"); + goto post_unlock; + } + } +unlock: + UNLOCK(&frame->lock); +post_unlock: + if (!is_last_call(this_call_cnt)) + goto out; + + /* -- last call: do patch ups -- */ + + if (local->op_ret == -1) { + goto unwind; + } + + ret = dht_vgetxattr_fill_and_set(local, &dict, this, _gf_true); + if (ret) + goto unwind; + + DHT_STACK_UNWIND(getxattr, frame, 0, 0, dict, xdata); + goto cleanup; - return 0; +unwind: + DHT_STACK_UNWIND(getxattr, frame, -1, local->op_errno, NULL, NULL); +cleanup: + if (dict) + dict_unref(dict); +out: + return 0; } +static int +dht_vgetxattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, + int op_errno, dict_t *xattr, dict_t *xdata) +{ + dht_local_t *local = NULL; + int ret = 0; + dict_t *dict = NULL; + xlator_t *prev = NULL; + gf_boolean_t flag = _gf_true; + + local = frame->local; + prev = cookie; + + if (op_ret < 0) { + local->op_ret = -1; + local->op_errno = op_errno; + gf_msg(this->name, GF_LOG_ERROR, op_errno, DHT_MSG_GET_XATTR_FAILED, + "vgetxattr: Subvolume %s returned -1", prev->name); + goto unwind; + } + + ret = dht_vgetxattr_alloc_and_fill(local, xattr, this, op_errno); + if (ret) { + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_NO_MEMORY, + "Allocation or fill failure"); + goto unwind; + } + + flag = (local->layout->cnt > 1) ? _gf_true : _gf_false; + + ret = dht_vgetxattr_fill_and_set(local, &dict, this, flag); + if (ret) + goto unwind; + + DHT_STACK_UNWIND(getxattr, frame, 0, 0, dict, xdata); + goto cleanup; -int -dht_readv_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno, - struct iovec *vector, int count, struct stat *stbuf, - struct iobref *iobref) +unwind: + DHT_STACK_UNWIND(getxattr, frame, -1, local->op_errno, NULL, NULL); +cleanup: + if (dict) + dict_unref(dict); + + return 0; +} + +static int +dht_linkinfo_getxattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, dict_t *xattr, + dict_t *xdata) { - DHT_STACK_UNWIND (readv, frame, op_ret, op_errno, vector, count, stbuf, - iobref); + int ret = 0; + char *value = NULL; + + if (op_ret != -1) { + ret = dict_get_str(xattr, GF_XATTR_PATHINFO_KEY, &value); + if (!ret) { + ret = dict_set_str(xattr, GF_XATTR_LINKINFO_KEY, value); + if (!ret) + gf_msg_trace(this->name, 0, "failed to set linkinfo"); + } + } - return 0; + DHT_STACK_UNWIND(getxattr, frame, op_ret, op_errno, xattr, xdata); + + return 0; } +static int +dht_mds_getxattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, dict_t *xattr, dict_t *xdata) +{ + dht_local_t *local = NULL; + dht_conf_t *conf = NULL; + + VALIDATE_OR_GOTO(frame, err); + VALIDATE_OR_GOTO(frame->local, err); + VALIDATE_OR_GOTO(this->private, err); + + conf = this->private; + local = frame->local; + + if (!xattr || (op_ret == -1)) { + local->op_ret = op_ret; + goto out; + } + dict_del(xattr, conf->xattr_name); + local->op_ret = 0; + + if (!local->xattr) { + local->xattr = dict_copy_with_ref(xattr, NULL); + } + +out: + DHT_STACK_UNWIND(getxattr, frame, local->op_ret, op_errno, local->xattr, + xdata); + return 0; +err: + DHT_STACK_UNWIND(getxattr, frame, -1, EINVAL, NULL, NULL); + return 0; +} int -dht_readv (call_frame_t *frame, xlator_t *this, - fd_t *fd, size_t size, off_t off) +dht_getxattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, + int op_errno, dict_t *xattr, dict_t *xdata) { - xlator_t *subvol = NULL; - int op_errno = -1; + int this_call_cnt = 0; + dht_local_t *local = NULL; + dht_conf_t *conf = NULL; + int ret = 0; + + VALIDATE_OR_GOTO(frame, err); + VALIDATE_OR_GOTO(frame->local, err); + VALIDATE_OR_GOTO(this->private, err); + + conf = this->private; + local = frame->local; + + if (dht_check_remote_fd_failed_error(local, op_ret, op_errno)) { + ret = dht_check_and_open_fd_on_subvol(this, frame); + if (ret) + goto err; + return 0; + } + LOCK(&frame->lock); + { + if (!xattr || (op_ret == -1)) { + local->op_ret = op_ret; + goto unlock; + } - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (fd, err); + dict_del(xattr, conf->xattr_name); + dict_del(xattr, conf->mds_xattr_key); - subvol = dht_subvol_get_cached (this, fd->inode); - if (!subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no cached subvolume for fd=%p", fd); - op_errno = EINVAL; - goto err; - } + dict_del(xattr, conf->commithash_xattr_name); - STACK_WIND (frame, dht_readv_cbk, - subvol, subvol->fops->readv, - fd, size, off); + if (frame->root->pid >= 0) { + GF_REMOVE_INTERNAL_XATTR("trusted.glusterfs.quota*", xattr); + GF_REMOVE_INTERNAL_XATTR("trusted.pgfid*", xattr); + } - return 0; + local->op_ret = 0; -err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (readv, frame, -1, op_errno, NULL, 0, NULL, NULL); + if (!local->xattr) { + local->xattr = dict_copy_with_ref(xattr, NULL); + } else { + dht_aggregate_xattr(local->xattr, xattr); + } + + if (!local->xdata) { + local->xdata = dict_ref(xdata); + } else if ((local->inode && IA_ISDIR(local->inode->ia_type)) || + (local->fd && IA_ISDIR(local->fd->inode->ia_type))) { + dht_aggregate_xattr(local->xdata, xdata); + } + } +unlock: + UNLOCK(&frame->lock); + + this_call_cnt = dht_frame_return(frame); + if (is_last_call(this_call_cnt)) { + /* If we have a valid xattr received from any one of the + * subvolume, let's return it */ + if (local->xattr) { + local->op_ret = 0; + } - return 0; + DHT_STACK_UNWIND(getxattr, frame, local->op_ret, op_errno, local->xattr, + local->xdata); + } + return 0; +err: + DHT_STACK_UNWIND(getxattr, frame, -1, EINVAL, NULL, NULL); + return 0; } +static int32_t +dht_getxattr_unwind(call_frame_t *frame, int op_ret, int op_errno, dict_t *dict, + dict_t *xdata) +{ + DHT_STACK_UNWIND(getxattr, frame, op_ret, op_errno, dict, xdata); + return 0; +} -int -dht_writev_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno, struct stat *prebuf, - struct stat *postbuf) +static int +dht_getxattr_get_real_filename_cbk(call_frame_t *frame, void *cookie, + xlator_t *this, int op_ret, int op_errno, + dict_t *xattr, dict_t *xdata) { - dht_local_t *local = NULL; + int this_call_cnt = 0; + dht_local_t *local = NULL; + + local = frame->local; + + LOCK(&frame->lock); + { + if (local->op_errno == EOPNOTSUPP) { + /* Nothing to do here, we have already found + * a subvol which does not have the get_real_filename + * optimization. If condition is for simple logic. + */ + goto unlock; + } if (op_ret == -1) { - goto out; + if (op_errno == EOPNOTSUPP) { + /* This subvol does not have the optimization. + * Better let the user know we don't support it. + * Remove previous results if any. + */ + + if (local->xattr) { + dict_unref(local->xattr); + local->xattr = NULL; + } + + if (local->xattr_req) { + dict_unref(local->xattr_req); + local->xattr_req = NULL; + } + + local->op_ret = op_ret; + local->op_errno = op_errno; + UNLOCK(&frame->lock); + gf_msg(this->name, GF_LOG_WARNING, op_errno, + DHT_MSG_UPGRADE_BRICKS, + "At least " + "one of the bricks does not support " + "this operation. Please upgrade all " + "bricks."); + goto post_unlock; + } + + if (op_errno == ENOATTR) { + /* Do nothing, our defaults are set to this. + */ + goto unlock; + } + + /* This is a place holder for every other error + * case. I am not sure of how to interpret + * ENOTCONN etc. As of now, choosing to ignore + * down subvol and return a good result(if any) + * from other subvol. + */ + UNLOCK(&frame->lock); + gf_msg(this->name, GF_LOG_WARNING, op_errno, + DHT_MSG_GET_XATTR_FAILED, "Failed to get real filename."); + goto post_unlock; } - local = frame->local; - if (!local) { - op_ret = -1; - op_errno = EINVAL; - goto out; - } - - prebuf->st_ino = local->st_ino; - postbuf->st_ino = local->st_ino; + /* This subvol has the required file. + * There could be other subvols which have returned + * success already, choosing to return the latest good + * result. + */ + if (local->xattr) + dict_unref(local->xattr); + local->xattr = dict_ref(xattr); + + if (local->xattr_req) { + dict_unref(local->xattr_req); + local->xattr_req = NULL; + } + if (xdata) + local->xattr_req = dict_ref(xdata); + + local->op_ret = op_ret; + local->op_errno = 0; + UNLOCK(&frame->lock); + gf_msg_debug(this->name, 0, "Found a matching file."); + goto post_unlock; + } +unlock: + UNLOCK(&frame->lock); +post_unlock: + this_call_cnt = dht_frame_return(frame); + if (is_last_call(this_call_cnt)) { + DHT_STACK_UNWIND(getxattr, frame, local->op_ret, local->op_errno, + local->xattr, local->xattr_req); + } + + return 0; +} -out: - DHT_STACK_UNWIND (writev, frame, op_ret, op_errno, prebuf, postbuf); +static int +dht_getxattr_get_real_filename(call_frame_t *frame, xlator_t *this, loc_t *loc, + const char *key, dict_t *xdata) +{ + dht_local_t *local = NULL; + int i = 0; + dht_layout_t *layout = NULL; + int cnt = 0; + xlator_t *subvol = NULL; - return 0; + local = frame->local; + layout = local->layout; + + cnt = local->call_cnt = layout->cnt; + + local->op_ret = -1; + local->op_errno = ENOATTR; + + for (i = 0; i < cnt; i++) { + subvol = layout->list[i].xlator; + STACK_WIND(frame, dht_getxattr_get_real_filename_cbk, subvol, + subvol->fops->getxattr, loc, key, xdata); + } + + return 0; } +static int +dht_marker_populate_args(call_frame_t *frame, int type, int *gauge, + xlator_t **subvols) +{ + dht_local_t *local = NULL; + int i = 0; + dht_layout_t *layout = NULL; -int -dht_writev (call_frame_t *frame, xlator_t *this, - fd_t *fd, struct iovec *vector, int count, off_t off, - struct iobref *iobref) -{ - xlator_t *subvol = NULL; - int op_errno = -1; - dht_local_t *local = NULL; - - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (fd, err); - - subvol = dht_subvol_get_cached (this, fd->inode); - if (!subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no cached subvolume for fd=%p", fd); - op_errno = EINVAL; - goto err; - } - - local = dht_local_init (frame); - if (!local) { - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - op_errno = ENOMEM; - goto err; + local = frame->local; + layout = local->layout; + + for (i = 0; i < layout->cnt; i++) + subvols[i] = layout->list[i].xlator; + + return layout->cnt; +} + +static int +dht_is_debug_xattr_key(const char **array, char *key) +{ + int i = 0; + + for (i = 0; array[i]; i++) { + if (fnmatch(array[i], key, FNM_NOESCAPE) == 0) + return i; + } + + return -1; +} + +/* Note we already have frame->local initialised here*/ + +static int +dht_handle_debug_getxattr(call_frame_t *frame, xlator_t *this, loc_t *loc, + const char *key) +{ + dht_local_t *local = NULL; + int ret = -1; + int op_errno = ENODATA; + char *value = NULL; + loc_t file_loc = {0}; + const char *name = NULL; + + local = frame->local; + + if (dht_is_debug_xattr_key(dht_dbg_vxattrs, (char *)key) == -1) { + goto out; + } + + local->xattr = dict_new(); + if (!local->xattr) { + op_errno = ENOMEM; + goto out; + } + + if (strncmp(key, DHT_DBG_HASHED_SUBVOL_KEY, + SLEN(DHT_DBG_HASHED_SUBVOL_KEY)) == 0) { + name = key + strlen(DHT_DBG_HASHED_SUBVOL_KEY); + if (strlen(name) == 0) { + op_errno = EINVAL; + goto out; } - local->st_ino = fd->inode->ino; + ret = dht_build_child_loc(this, &file_loc, loc, (char *)name); + if (ret) { + op_errno = ENOMEM; + goto out; + } - STACK_WIND (frame, dht_writev_cbk, - subvol, subvol->fops->writev, - fd, vector, count, off, iobref); + local->hashed_subvol = dht_subvol_get_hashed(this, &file_loc); + if (local->hashed_subvol == NULL) { + op_errno = ENODATA; + goto out; + } - return 0; + value = gf_strdup(local->hashed_subvol->name); + if (!value) { + op_errno = ENOMEM; + goto out; + } -err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (writev, frame, -1, op_errno, NULL, NULL); + ret = dict_set_dynstr(local->xattr, (char *)key, value); + if (ret < 0) { + op_errno = -ret; + ret = -1; + goto out; + } + ret = 0; + goto out; + } - return 0; +out: + loc_wipe(&file_loc); + DHT_STACK_UNWIND(getxattr, frame, ret, op_errno, local->xattr, NULL); + return 0; } +/* Virtual Xattr which returns 1 if all subvols are up, + else returns 0. Geo-rep then uses this virtual xattr + after a fresh mount and starts the I/O. +*/ + +enum dht_vxattr_subvol { + DHT_VXATTR_SUBVOLS_UP = 1, + DHT_VXATTR_SUBVOLS_DOWN = 0, +}; + +int +dht_vgetxattr_subvol_status(call_frame_t *frame, xlator_t *this, + const char *key) +{ + dht_local_t *local = NULL; + int ret = -1; + int op_errno = ENODATA; + int value = DHT_VXATTR_SUBVOLS_UP; + int i = 0; + dht_conf_t *conf = NULL; + + conf = this->private; + local = frame->local; + + if (!key) { + op_errno = EINVAL; + goto out; + } + local->xattr = dict_new(); + if (!local->xattr) { + op_errno = ENOMEM; + goto out; + } + for (i = 0; i < conf->subvolume_cnt; i++) { + if (!conf->subvolume_status[i]) { + value = DHT_VXATTR_SUBVOLS_DOWN; + gf_msg_debug(this->name, 0, "subvol %s is down ", + conf->subvolumes[i]->name); + break; + } + } + ret = dict_set_int8(local->xattr, (char *)key, value); + if (ret < 0) { + op_errno = -ret; + ret = -1; + goto out; + } + ret = 0; + +out: + DHT_STACK_UNWIND(getxattr, frame, ret, op_errno, local->xattr, NULL); + return 0; +} int -dht_flush (call_frame_t *frame, xlator_t *this, fd_t *fd) +dht_getxattr(call_frame_t *frame, xlator_t *this, loc_t *loc, const char *key, + dict_t *xdata) +#define DHT_IS_DIR(layout) (layout->cnt > 1) { - xlator_t *subvol = NULL; - int op_errno = -1; - dht_local_t *local = NULL; + xlator_t *subvol = NULL; + xlator_t *hashed_subvol = NULL; + xlator_t *mds_subvol = NULL; + xlator_t *cached_subvol = NULL; + dht_conf_t *conf = NULL; + dht_local_t *local = NULL; + dht_layout_t *layout = NULL; + int op_errno = -1; + int i = 0; + int cnt = 0; + char *node_uuid_key = NULL; + int ret = -1; + + GF_CHECK_XATTR_KEY_AND_GOTO(key, IO_THREADS_QUEUE_SIZE_KEY, op_errno, err); + VALIDATE_OR_GOTO(frame, err); + VALIDATE_OR_GOTO(this, err); + VALIDATE_OR_GOTO(loc, err); + VALIDATE_OR_GOTO(loc->inode, err); + VALIDATE_OR_GOTO(this->private, err); + + conf = this->private; + + local = dht_local_init(frame, loc, NULL, GF_FOP_GETXATTR); + if (!local) { + op_errno = ENOMEM; + + goto err; + } + + layout = local->layout; + if (!layout) { + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LAYOUT_NULL, + "Layout is NULL"); + op_errno = ENOENT; + goto err; + } + + /* skip over code which is irrelevant without a valid key */ + if (!key) + goto no_key; + + local->key = gf_strdup(key); + if (!local->key) { + op_errno = ENOMEM; + goto err; + } + + if (strncmp(key, conf->mds_xattr_key, strlen(key)) == 0) { + op_errno = ENOTSUP; + goto err; + } + + if (strncmp(key, DHT_SUBVOL_STATUS_KEY, SLEN(DHT_SUBVOL_STATUS_KEY)) == 0) { + dht_vgetxattr_subvol_status(frame, this, key); + return 0; + } + + /* skip over code which is irrelevant if !DHT_IS_DIR(layout) */ + if (!DHT_IS_DIR(layout)) + goto no_dht_is_dir; + + if ((strncmp(key, GF_XATTR_GET_REAL_FILENAME_KEY, + SLEN(GF_XATTR_GET_REAL_FILENAME_KEY)) == 0) && + DHT_IS_DIR(layout)) { + dht_getxattr_get_real_filename(frame, this, loc, key, xdata); + return 0; + } + + if (!strcmp(key, GF_REBAL_FIND_LOCAL_SUBVOL)) { + ret = gf_asprintf(&node_uuid_key, "%s", GF_XATTR_LIST_NODE_UUIDS_KEY); + if (ret == -1 || !node_uuid_key) { + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_NO_MEMORY, + "Failed to copy node uuid key"); + op_errno = ENOMEM; + goto err; + } + (void)snprintf(local->xsel, sizeof(local->xsel), "%s", node_uuid_key); + cnt = local->call_cnt = conf->subvolume_cnt; + for (i = 0; i < cnt; i++) { + STACK_WIND_COOKIE(frame, dht_find_local_subvol_cbk, + conf->subvolumes[i], conf->subvolumes[i], + conf->subvolumes[i]->fops->getxattr, loc, + node_uuid_key, xdata); + } + if (node_uuid_key) + GF_FREE(node_uuid_key); + return 0; + } + + if (!strcmp(key, GF_REBAL_OLD_FIND_LOCAL_SUBVOL)) { + ret = gf_asprintf(&node_uuid_key, "%s", GF_XATTR_NODE_UUID_KEY); + if (ret == -1 || !node_uuid_key) { + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_NO_MEMORY, + "Failed to copy node uuid key"); + op_errno = ENOMEM; + goto err; + } + (void)snprintf(local->xsel, sizeof(local->xsel), "%s", node_uuid_key); + cnt = local->call_cnt = conf->subvolume_cnt; + for (i = 0; i < cnt; i++) { + STACK_WIND_COOKIE(frame, dht_find_local_subvol_cbk, + conf->subvolumes[i], conf->subvolumes[i], + conf->subvolumes[i]->fops->getxattr, loc, + node_uuid_key, xdata); + } + if (node_uuid_key) + GF_FREE(node_uuid_key); + return 0; + } + + /* for file use cached subvolume (obviously!): see if {} + * below + * for directory: + * wind to all subvolumes and exclude subvolumes which + * return ENOTCONN (in callback) + * + * NOTE: Don't trust inode here, as that may not be valid + * (until inode_link() happens) + */ + + if (XATTR_IS_PATHINFO(key) || (strcmp(key, GF_XATTR_NODE_UUID_KEY) == 0) || + (strcmp(key, GF_XATTR_LIST_NODE_UUIDS_KEY) == 0)) { + (void)snprintf(local->xsel, sizeof(local->xsel), "%s", key); + cnt = local->call_cnt = layout->cnt; + for (i = 0; i < cnt; i++) { + subvol = layout->list[i].xlator; + STACK_WIND(frame, dht_vgetxattr_dir_cbk, subvol, + subvol->fops->getxattr, loc, key, xdata); + } + return 0; + } + +no_dht_is_dir: + /* node-uuid or pathinfo for files */ + if (XATTR_IS_PATHINFO(key) || (strcmp(key, GF_XATTR_NODE_UUID_KEY) == 0)) { + cached_subvol = local->cached_subvol; + (void)snprintf(local->xsel, sizeof(local->xsel), "%s", key); + local->call_cnt = 1; + STACK_WIND_COOKIE(frame, dht_vgetxattr_cbk, cached_subvol, + cached_subvol, cached_subvol->fops->getxattr, loc, + key, xdata); + + return 0; + } + + if (strcmp(key, GF_XATTR_LINKINFO_KEY) == 0) { + hashed_subvol = dht_subvol_get_hashed(this, loc); + if (!hashed_subvol) { + gf_msg(this->name, GF_LOG_ERROR, 0, + DHT_MSG_HASHED_SUBVOL_GET_FAILED, + "Failed to get hashed subvol for %s", loc->path); + op_errno = EINVAL; + goto err; + } + cached_subvol = dht_subvol_get_cached(this, loc->inode); + if (!cached_subvol) { + gf_msg(this->name, GF_LOG_ERROR, 0, + DHT_MSG_CACHED_SUBVOL_GET_FAILED, + "Failed to get cached subvol for %s", loc->path); + op_errno = EINVAL; + goto err; + } - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (fd, err); + if (hashed_subvol == cached_subvol) { + op_errno = ENODATA; + goto err; + } - subvol = dht_subvol_get_cached (this, fd->inode); - if (!subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no cached subvolume for fd=%p", fd); - op_errno = EINVAL; - goto err; - } + STACK_WIND(frame, dht_linkinfo_getxattr_cbk, hashed_subvol, + hashed_subvol->fops->getxattr, loc, GF_XATTR_PATHINFO_KEY, + xdata); + return 0; + } - local = dht_local_init (frame); - if (!local) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } + if (dht_is_debug_xattr_key(dht_dbg_vxattrs, (char *)key) >= 0) { + dht_handle_debug_getxattr(frame, this, loc, key); + return 0; + } - local->fd = fd_ref (fd); - local->call_cnt = 1; +no_key: + if (cluster_handle_marker_getxattr(frame, loc, key, conf->vol_uuid, + dht_getxattr_unwind, + dht_marker_populate_args) == 0) + return 0; - STACK_WIND (frame, dht_err_cbk, - subvol, subvol->fops->flush, fd); + if (DHT_IS_DIR(layout)) { + local->call_cnt = conf->subvolume_cnt; + cnt = conf->subvolume_cnt; + ret = dht_inode_ctx_mdsvol_get(loc->inode, this, &mds_subvol); + if (!mds_subvol) { + gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_HASHED_SUBVOL_GET_FAILED, + "Cannot determine MDS, fetching xattr %s randomly" + " from a subvol for path %s ", + key, loc->path); + } else { + /* TODO need to handle it, As of now we are + choosing availability instead of chossing + consistencty, in case of mds_subvol is + down winding a getxattr call on other subvol + and return xattr + */ + local->mds_subvol = mds_subvol; + for (i = 0; i < cnt; i++) { + if (conf->subvolumes[i] == mds_subvol) { + if (!conf->subvolume_status[i]) { + gf_msg(this->name, GF_LOG_INFO, 0, + DHT_MSG_HASHED_SUBVOL_DOWN, + "MDS %s is down for path" + " path %s so fetching xattr " + "%s randomly from a subvol ", + local->mds_subvol->name, loc->path, key); + ret = 1; + } + } + } + } + + if (!ret && key && local->mds_subvol && dht_match_xattr(key)) { + STACK_WIND(frame, dht_mds_getxattr_cbk, local->mds_subvol, + local->mds_subvol->fops->getxattr, loc, key, xdata); + + return 0; + } + } else { + cnt = local->call_cnt = 1; + } - return 0; + for (i = 0; i < cnt; i++) { + subvol = layout->list[i].xlator; + STACK_WIND(frame, dht_getxattr_cbk, subvol, subvol->fops->getxattr, loc, + key, xdata); + } + return 0; err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (flush, frame, -1, op_errno); + op_errno = (op_errno == -1) ? errno : op_errno; + DHT_STACK_UNWIND(getxattr, frame, -1, op_errno, NULL, NULL); - return 0; + return 0; } - +#undef DHT_IS_DIR int -dht_fsync (call_frame_t *frame, xlator_t *this, - fd_t *fd, int datasync) +dht_fgetxattr(call_frame_t *frame, xlator_t *this, fd_t *fd, const char *key, + dict_t *xdata) { - xlator_t *subvol = NULL; - int op_errno = -1; - dht_local_t *local = NULL; + xlator_t *subvol = NULL; + dht_local_t *local = NULL; + dht_layout_t *layout = NULL; + int op_errno = -1; + int i = 0; + int cnt = 0; + xlator_t *mds_subvol = NULL; + int ret = -1; + dht_conf_t *conf = NULL; + char gfid[GF_UUID_BUF_SIZE] = {0}; + + VALIDATE_OR_GOTO(frame, err); + VALIDATE_OR_GOTO(this, err); + VALIDATE_OR_GOTO(fd, err); + VALIDATE_OR_GOTO(fd->inode, err); + VALIDATE_OR_GOTO(this->private, err); + + conf = this->private; + + local = dht_local_init(frame, NULL, fd, GF_FOP_FGETXATTR); + if (!local) { + op_errno = ENOMEM; + + goto err; + } + + layout = local->layout; + if (!layout) { + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LAYOUT_NULL, + "Layout is NULL"); + op_errno = ENOENT; + goto err; + } + + if (key) { + local->key = gf_strdup(key); + if (!local->key) { + op_errno = ENOMEM; + goto err; + } + } + + gf_uuid_unparse(fd->inode->gfid, gfid); + + if ((fd->inode->ia_type == IA_IFDIR) && key && + (strncmp(key, GF_XATTR_LOCKINFO_KEY, SLEN(GF_XATTR_LOCKINFO_KEY)) != + 0)) { + local->call_cnt = conf->subvolume_cnt; + cnt = conf->subvolume_cnt; + ret = dht_inode_ctx_mdsvol_get(fd->inode, this, &mds_subvol); + + if (!mds_subvol) { + gf_msg(this->name, GF_LOG_ERROR, 0, + DHT_MSG_HASHED_SUBVOL_GET_FAILED, + "cannot determine MDS, fetching xattr %s " + " randomly from a subvol for gfid %s ", + key, gfid); + } else { + /* TODO need to handle it, As of now we are + choosing availability instead of chossing + consistencty, in case of hashed_subvol is + down winding a getxattr call on other subvol + and return xattr + */ + local->mds_subvol = mds_subvol; + for (i = 0; i < cnt; i++) { + if (conf->subvolumes[i] == mds_subvol) { + if (!conf->subvolume_status[i]) { + gf_msg(this->name, GF_LOG_WARNING, 0, + DHT_MSG_HASHED_SUBVOL_DOWN, + "MDS subvolume %s is down" + " for gfid %s so fetching xattr " + " %s randomly from a subvol ", + local->mds_subvol->name, gfid, key); + ret = 1; + } + } + } + } + + if (!ret && key && local->mds_subvol && dht_match_xattr(key)) { + STACK_WIND(frame, dht_mds_getxattr_cbk, local->mds_subvol, + local->mds_subvol->fops->fgetxattr, fd, key, NULL); + + return 0; + } + } else { + cnt = local->call_cnt = 1; + } - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (fd, err); + for (i = 0; i < cnt; i++) { + subvol = layout->list[i].xlator; + STACK_WIND(frame, dht_getxattr_cbk, subvol, subvol->fops->fgetxattr, fd, + key, NULL); + } + return 0; - subvol = dht_subvol_get_cached (this, fd->inode); - if (!subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no cached subvolume for fd=%p", fd); - op_errno = EINVAL; - goto err; - } +err: + op_errno = (op_errno == -1) ? errno : op_errno; + DHT_STACK_UNWIND(fgetxattr, frame, -1, op_errno, NULL, NULL); + + return 0; +} + +static int +dht_setxattr2(xlator_t *this, xlator_t *subvol, call_frame_t *frame, int ret) +{ + dht_local_t *local = NULL; + int op_errno = EINVAL; + + if (!frame || !frame->local) + goto err; + + local = frame->local; + op_errno = local->op_errno; + + if (we_are_not_migrating(ret)) { + /* This dht xlator is not migrating the file. Unwind and + * pass on the original mode bits so the higher DHT layer + * can handle this. + */ + DHT_STACK_UNWIND(setxattr, frame, local->op_ret, local->op_errno, + local->rebalance.xdata); + return 0; + } - local = dht_local_init (frame); - if (!local) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } - local->call_cnt = 1; + if (subvol == NULL) + goto err; - local->st_ino = fd->inode->ino; + local->call_cnt = 2; /* This is the second attempt */ - STACK_WIND (frame, dht_fsync_cbk, - subvol, subvol->fops->fsync, - fd, datasync); + if (local->fop == GF_FOP_SETXATTR) { + STACK_WIND_COOKIE(frame, dht_file_setxattr_cbk, subvol, subvol, + subvol->fops->setxattr, &local->loc, + local->rebalance.xattr, local->rebalance.flags, + local->xattr_req); + } else { + STACK_WIND_COOKIE(frame, dht_file_setxattr_cbk, subvol, subvol, + subvol->fops->fsetxattr, local->fd, + local->rebalance.xattr, local->rebalance.flags, + local->xattr_req); + } - return 0; + return 0; err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (fsync, frame, -1, op_errno, NULL, NULL); + DHT_STACK_UNWIND(setxattr, frame, (local ? local->op_ret : -1), op_errno, + NULL); + return 0; +} + +int +dht_file_setxattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, dict_t *xdata) +{ + int ret = -1; + dht_local_t *local = NULL; + xlator_t *prev = NULL; + struct iatt *stbuf = NULL; + inode_t *inode = NULL; + xlator_t *subvol1 = NULL, *subvol2 = NULL; + + local = frame->local; + prev = cookie; + + local->op_errno = op_errno; + + if ((local->fop == GF_FOP_FSETXATTR) && + dht_check_remote_fd_failed_error(local, op_ret, op_errno)) { + ret = dht_check_and_open_fd_on_subvol(this, frame); + if (ret) + goto out; + return 0; + } + + if ((op_ret == -1) && !dht_inode_missing(op_errno)) { + gf_msg_debug(this->name, op_errno, "subvolume %s returned -1.", + prev->name); + goto out; + } + + if (local->call_cnt != 1) + goto out; + + ret = dict_get_bin(xdata, DHT_IATT_IN_XDATA_KEY, (void **)&stbuf); + + if ((!op_ret) && !stbuf) { + goto out; + } + + local->op_ret = op_ret; + local->rebalance.target_op_fn = dht_setxattr2; + if (xdata) + local->rebalance.xdata = dict_ref(xdata); + + /* Phase 2 of migration */ + if ((op_ret == -1) || IS_DHT_MIGRATION_PHASE2(stbuf)) { + ret = dht_rebalance_complete_check(this, frame); + if (!ret) + return 0; + } + + /* Phase 1 of migration */ + if (IS_DHT_MIGRATION_PHASE1(stbuf)) { + inode = (local->fd) ? local->fd->inode : local->loc.inode; + + ret = dht_inode_ctx_get_mig_info(this, inode, &subvol1, &subvol2); + if (!dht_mig_info_is_invalid(local->cached_subvol, subvol1, subvol2)) { + dht_setxattr2(this, subvol2, frame, 0); + return 0; + } + + ret = dht_rebalance_in_progress_check(this, frame); + if (!ret) + return 0; + } + +out: + + if (local->fop == GF_FOP_SETXATTR) { + DHT_STACK_UNWIND(setxattr, frame, op_ret, op_errno, xdata); + } else { + DHT_STACK_UNWIND(fsetxattr, frame, op_ret, op_errno, xdata); + } + + return 0; +} - return 0; +/* Function is call by dict_foreach_fnmatch if key is match with + user.* and set boolean flag to true +*/ +static int +dht_is_user_xattr(dict_t *this, char *key, data_t *value, void *data) +{ + gf_boolean_t *user_xattr_found = data; + *user_xattr_found = _gf_true; + return 0; } +/* Common code to wind a (f)(set|remove)xattr call to set xattr on directory + */ +static int +dht_dir_common_set_remove_xattr(call_frame_t *frame, xlator_t *this, loc_t *loc, + fd_t *fd, dict_t *xattr, int flags, + dict_t *xdata, int *op_errno) -int -dht_lk_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno, struct flock *flock) { - DHT_STACK_UNWIND (lk, frame, op_ret, op_errno, flock); + dict_t *xattrop = NULL; + int32_t subone[1] = {-1}; + gf_boolean_t uxattr_key_found = _gf_false; + xlator_t *mds_subvol = NULL; + xlator_t *travvol = NULL; + dht_conf_t *conf = NULL; + int ret = -1; + int i = 0; + int call_cnt = 0; + dht_local_t *local = NULL; + char gfid_local[GF_UUID_BUF_SIZE] = {0}; + char **xattrs_to_heal; + + conf = this->private; + local = frame->local; + call_cnt = conf->subvolume_cnt; + local->flags = flags; + xattrs_to_heal = get_xattrs_to_heal(); + + if (!gf_uuid_is_null(local->gfid)) { + gf_uuid_unparse(local->gfid, gfid_local); + } + + if ((local->fop == GF_FOP_SETXATTR) || (local->fop == GF_FOP_FSETXATTR)) { + /* Check if any user xattr present in xattr + */ + dict_foreach_fnmatch(xattr, "user*", dht_is_user_xattr, + &uxattr_key_found); + + /* Check if any custom key xattr present in dict xattr + and start index from 1 because user xattr already + checked in previous line + */ + for (i = 1; xattrs_to_heal[i]; i++) + if (dict_get(xattr, xattrs_to_heal[i])) + uxattr_key_found = _gf_true; + } + + if ((local->fop == GF_FOP_REMOVEXATTR) || + (local->fop == GF_FOP_FREMOVEXATTR)) { + /* Check if any custom key xattr present in local->key + */ + for (i = 0; xattrs_to_heal[i]; i++) + if (strstr(local->key, xattrs_to_heal[i])) + uxattr_key_found = _gf_true; + } + + /* If there is no custom key xattr present or gfid is root + or call_cnt is 1 then wind a (f)setxattr call on all subvols + */ + if (!uxattr_key_found || __is_root_gfid(local->gfid) || call_cnt == 1) { + for (i = 0; i < conf->subvolume_cnt; i++) { + travvol = conf->subvolumes[i]; + if ((local->fop == GF_FOP_SETXATTR) || + (local->fop == GF_FOP_FSETXATTR)) { + if (fd) { + STACK_WIND_COOKIE(frame, dht_err_cbk, travvol, travvol, + travvol->fops->fsetxattr, fd, xattr, + flags, xdata); + } else { + STACK_WIND_COOKIE(frame, dht_err_cbk, travvol, travvol, + travvol->fops->setxattr, loc, xattr, + flags, xdata); + } + } + + if ((local->fop == GF_FOP_REMOVEXATTR) || + (local->fop == GF_FOP_FREMOVEXATTR)) { + if (fd) { + STACK_WIND_COOKIE(frame, dht_err_cbk, travvol, travvol, + travvol->fops->fremovexattr, fd, + local->key, local->xattr_req); + } else { + STACK_WIND_COOKIE(frame, dht_err_cbk, travvol, travvol, + travvol->fops->removexattr, loc, + local->key, local->xattr_req); + } + } + } return 0; + } + + /* Calculate hash subvol based on inode and parent inode + */ + if (fd) { + ret = dht_inode_ctx_mdsvol_get(fd->inode, this, &mds_subvol); + } else { + ret = dht_inode_ctx_mdsvol_get(loc->inode, this, &mds_subvol); + } + if (ret || !mds_subvol) { + if (fd) { + gf_msg(this->name, GF_LOG_ERROR, 0, + DHT_MSG_HASHED_SUBVOL_GET_FAILED, + "Failed to get mds subvol for fd %p" + "gfid is %s ", + fd, gfid_local); + } else { + gf_msg(this->name, GF_LOG_ERROR, 0, + DHT_MSG_HASHED_SUBVOL_GET_FAILED, + "%s: Failed to get mds subvol. (gfid is %s)", loc->path, + gfid_local); + } + (*op_errno) = ENOENT; + goto err; + } + + local->mds_subvol = mds_subvol; + + for (i = 0; i < conf->subvolume_cnt; i++) { + if (conf->subvolumes[i] == mds_subvol) { + if (!conf->subvolume_status[i]) { + gf_msg(this->name, GF_LOG_WARNING, 0, + DHT_MSG_HASHED_SUBVOL_DOWN, + "MDS subvol is down for path " + " %s gfid is %s Unable to set xattr ", + local->loc.path, gfid_local); + (*op_errno) = ENOTCONN; + goto err; + } + } + } + + if (uxattr_key_found) { + xattrop = dict_new(); + if (!xattrop) { + gf_msg(this->name, GF_LOG_ERROR, DHT_MSG_NO_MEMORY, 0, + "dictionary creation failed for path %s " + "for gfid is %s ", + local->loc.path, gfid_local); + (*op_errno) = ENOMEM; + goto err; + } + local->xattr = dict_ref(xattr); + /* Subtract current MDS xattr value to -1 , value of MDS + xattr represents no. of times xattr modification failed + on non MDS subvols. + */ + ret = dht_dict_set_array(xattrop, conf->mds_xattr_key, subone, 1); + if (ret != 0) { + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_DICT_SET_FAILED, + "dictionary set array failed for path %s " + "for gfid is %s ", + local->loc.path, gfid_local); + if (xattrop) + dict_unref(xattrop); + (*op_errno) = ret; + goto err; + } + /* Wind a xattrop call to use ref counting approach + update mds xattr to -1 before update xattr on + hashed subvol and update mds xattr to +1 after update + xattr on all non hashed subvol + */ + if (fd) { + STACK_WIND(frame, dht_xattrop_mds_cbk, local->mds_subvol, + local->mds_subvol->fops->fxattrop, fd, + GF_XATTROP_ADD_ARRAY, xattrop, NULL); + } else { + STACK_WIND(frame, dht_xattrop_mds_cbk, local->mds_subvol, + local->mds_subvol->fops->xattrop, loc, + GF_XATTROP_ADD_ARRAY, xattrop, NULL); + } + if (xattrop) + dict_unref(xattrop); + } + + return 0; +err: + return -1; +} + +int +dht_fsetxattr(call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *xattr, + int flags, dict_t *xdata) +{ + xlator_t *subvol = NULL; + dht_local_t *local = NULL; + int op_errno = EINVAL; + dht_conf_t *conf = NULL; + dht_layout_t *layout = NULL; + int ret = -1; + int call_cnt = 0; + + VALIDATE_OR_GOTO(frame, err); + VALIDATE_OR_GOTO(this, err); + VALIDATE_OR_GOTO(fd, err); + VALIDATE_OR_GOTO(fd->inode, err); + VALIDATE_OR_GOTO(this->private, err); + + conf = this->private; + + if (!conf->defrag) + GF_IF_INTERNAL_XATTR_GOTO(conf->wild_xattr_name, xattr, op_errno, err); + + local = dht_local_init(frame, NULL, fd, GF_FOP_FSETXATTR); + if (!local) { + op_errno = ENOMEM; + goto err; + } + + subvol = local->cached_subvol; + if (!subvol) { + gf_msg_debug(this->name, 0, "no cached subvolume for fd=%p", fd); + op_errno = EINVAL; + goto err; + } + + layout = local->layout; + if (!layout) { + gf_msg_debug(this->name, 0, "no layout for fd=%p", fd); + op_errno = EINVAL; + goto err; + } + + local->xattr_req = xdata ? dict_ref(xdata) : dict_new(); + local->call_cnt = call_cnt = layout->cnt; + + if (IA_ISDIR(fd->inode->ia_type)) { + local->hashed_subvol = NULL; + ret = dht_dir_common_set_remove_xattr(frame, this, NULL, fd, xattr, + flags, xdata, &op_errno); + if (ret) + goto err; + } else { + local->call_cnt = 1; + local->rebalance.xattr = dict_ref(xattr); + local->rebalance.flags = flags; + + ret = dict_set_int8(local->xattr_req, DHT_IATT_IN_XDATA_KEY, 1); + if (ret) { + gf_msg_debug(this->name, 0, + "Failed to set dictionary key %s for fd=%p", + DHT_IATT_IN_XDATA_KEY, fd); + } + + STACK_WIND_COOKIE(frame, dht_file_setxattr_cbk, subvol, subvol, + subvol->fops->fsetxattr, fd, xattr, flags, + local->xattr_req); + } + return 0; + +err: + op_errno = (op_errno == -1) ? errno : op_errno; + DHT_STACK_UNWIND(fsetxattr, frame, -1, op_errno, NULL); + + return 0; +} + +static int +dht_checking_pathinfo_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, dict_t *xattr, + dict_t *xdata) +{ + int i = -1; + int ret = -1; + char *value = NULL; + dht_local_t *local = NULL; + dht_conf_t *conf = NULL; + xlator_t *prev = NULL; + int this_call_cnt = 0; + + local = frame->local; + prev = cookie; + conf = this->private; + + if (op_ret == -1) + goto out; + + ret = dict_get_str(xattr, GF_XATTR_PATHINFO_KEY, &value); + if (ret) + goto out; + + if (!strcmp(value, local->key)) { + for (i = 0; i < conf->subvolume_cnt; i++) { + if (conf->subvolumes[i] == prev) + conf->decommissioned_bricks[i] = prev; + } + } + +out: + this_call_cnt = dht_frame_return(frame); + if (is_last_call(this_call_cnt)) { + DHT_STACK_UNWIND(setxattr, frame, local->op_ret, ENOTSUP, NULL); + } + return 0; +} + +static int +dht_nuke_dir_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, struct iatt *preparent, + struct iatt *postparent, dict_t *xdata) +{ + STACK_UNWIND_STRICT(setxattr, frame, op_ret, op_errno, NULL); + return 0; } +static int +dht_nuke_dir(call_frame_t *frame, xlator_t *this, loc_t *loc, data_t *tmp) +{ + if (!IA_ISDIR(loc->inode->ia_type)) { + DHT_STACK_UNWIND(setxattr, frame, -1, ENOTSUP, NULL); + return 0; + } + + /* Setxattr didn't need the parent, but rmdir does. */ + loc->parent = inode_parent(loc->inode, NULL, NULL); + if (!loc->parent) { + DHT_STACK_UNWIND(setxattr, frame, -1, ENOENT, NULL); + return 0; + } + gf_uuid_copy(loc->pargfid, loc->parent->gfid); + + if (!loc->name && loc->path) { + loc->name = strrchr(loc->path, '/'); + if (loc->name) { + ++(loc->name); + } + } + + /* + * We do this instead of calling dht_rmdir_do directly for two reasons. + * The first is that we want to reuse all of the initialization that + * dht_rmdir does, so if it ever changes we'll just follow along. The + * second (i.e. why we don't use STACK_WIND_TAIL) is so that we don't + * obscure the fact that we came in via this path instead of a genuine + * rmdir. That makes debugging just a tiny bit easier. + */ + STACK_WIND(frame, dht_nuke_dir_cbk, this, this->fops->rmdir, loc, 1, NULL); + + return 0; +} int -dht_lk (call_frame_t *frame, xlator_t *this, - fd_t *fd, int cmd, struct flock *flock) +dht_setxattr(call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xattr, + int flags, dict_t *xdata) { - xlator_t *subvol = NULL; - int op_errno = -1; + xlator_t *subvol = NULL; + dht_local_t *local = NULL; + dht_conf_t *conf = NULL; + dht_methods_t *methods = NULL; + dht_layout_t *layout = NULL; + int i = 0; + int op_errno = EINVAL; + int ret = -1; + data_t *tmp = NULL; + uint32_t dir_spread = 0; + char value[4096] = { + 0, + }; + gf_dht_migrate_data_type_t forced_rebalance = GF_DHT_MIGRATE_DATA; + int call_cnt = 0; + uint32_t new_hash = 0; + + VALIDATE_OR_GOTO(frame, err); + VALIDATE_OR_GOTO(this, err); + VALIDATE_OR_GOTO(loc, err); + VALIDATE_OR_GOTO(loc->inode, err); + + conf = this->private; + GF_VALIDATE_OR_GOTO(this->name, conf, err); + + methods = &(conf->methods); + + /* Rebalance daemon is allowed to set internal keys */ + if (!conf->defrag) + GF_IF_INTERNAL_XATTR_GOTO(conf->wild_xattr_name, xattr, op_errno, err); + + local = dht_local_init(frame, loc, NULL, GF_FOP_SETXATTR); + if (!local) { + op_errno = ENOMEM; + goto err; + } + + subvol = local->cached_subvol; + if (!subvol) { + gf_msg_debug(this->name, 0, "no cached subvolume for path=%s", + loc->path); + op_errno = EINVAL; + goto err; + } + + layout = local->layout; + if (!layout) { + gf_msg_debug(this->name, 0, "no layout for path=%s", loc->path); + op_errno = EINVAL; + goto err; + } + + local->call_cnt = call_cnt = layout->cnt; + tmp = dict_get(xattr, conf->mds_xattr_key); + if (tmp) { + op_errno = ENOTSUP; + goto err; + } + + tmp = dict_get(xattr, GF_XATTR_FILE_MIGRATE_KEY); + if (tmp) { + if (IA_ISDIR(loc->inode->ia_type)) { + op_errno = ENOTSUP; + goto err; + } + + /* TODO: need to interpret the 'value' for more meaning + (ie, 'target' subvolume given there, etc) */ + memcpy(value, tmp->data, tmp->len); + if (strcmp(value, "force") == 0) + forced_rebalance = GF_DHT_MIGRATE_DATA_EVEN_IF_LINK_EXISTS; + + if (conf->decommission_in_progress) + forced_rebalance = GF_DHT_MIGRATE_HARDLINK; + + if (!loc->path) { + op_errno = EINVAL; + goto err; + } + + if (!local->loc.name) + local->loc.name = strrchr(local->loc.path, '/') + 1; + + if (!local->loc.parent) + local->loc.parent = inode_parent(local->loc.inode, NULL, NULL); + + if ((!local->loc.name) || (!local->loc.parent)) { + op_errno = EINVAL; + goto err; + } + + if (gf_uuid_is_null(local->loc.pargfid)) + gf_uuid_copy(local->loc.pargfid, local->loc.parent->gfid); + + methods->migration_get_dst_subvol(this, local); + + if (!local->rebalance.target_node) { + gf_msg(this->name, GF_LOG_ERROR, 0, + DHT_MSG_HASHED_SUBVOL_GET_FAILED, + "Failed to get hashed subvol for %s", loc->path); + op_errno = EINVAL; + goto err; + } + + local->rebalance.from_subvol = local->cached_subvol; + + if (local->rebalance.target_node == local->rebalance.from_subvol) { + op_errno = EEXIST; + goto err; + } + if (local->rebalance.target_node) { + local->flags = forced_rebalance; + frame->root->pid = GF_CLIENT_PID_DEFRAG; - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (fd, err); + ret = dht_start_rebalance_task(this, frame); + if (!ret) + return 0; - subvol = dht_subvol_get_cached (this, fd->inode); - if (!subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no cached subvolume for fd=%p", fd); - op_errno = EINVAL; - goto err; - } + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_REBALANCE_START_FAILED, + "%s: failed to create a new rebalance synctask", loc->path); + } + op_errno = EINVAL; + goto err; + } + + tmp = dict_get(xattr, "decommission-brick"); + if (tmp) { + /* This operation should happen only on '/' */ + if (!__is_root_gfid(loc->inode->gfid)) { + op_errno = ENOTSUP; + goto err; + } - STACK_WIND (frame, dht_lk_cbk, - subvol, subvol->fops->lk, - fd, cmd, flock); + memcpy(value, tmp->data, min(tmp->len, 4095)); + local->key = gf_strdup(value); + local->call_cnt = conf->subvolume_cnt; - return 0; + for (i = 0; i < conf->subvolume_cnt; i++) { + /* Get the pathinfo, and then compare */ + STACK_WIND_COOKIE(frame, dht_checking_pathinfo_cbk, + conf->subvolumes[i], conf->subvolumes[i], + conf->subvolumes[i]->fops->getxattr, loc, + GF_XATTR_PATHINFO_KEY, NULL); + } + return 0; + } + + tmp = dict_get(xattr, GF_XATTR_FIX_LAYOUT_KEY); + if (tmp) { + ret = dict_get_uint32(xattr, "new-commit-hash", &new_hash); + if (ret == 0) { + gf_msg_debug(this->name, 0, + "updating commit hash for %s from %u to %u", + uuid_utoa(loc->gfid), layout->commit_hash, new_hash); + layout->commit_hash = new_hash; + + ret = dht_update_commit_hash_for_layout(frame); + if (ret) { + op_errno = ENOTCONN; + goto err; + } + return ret; + } + + gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_FIX_LAYOUT_INFO, + "fixing the layout of %s", loc->path); + + ret = dht_fix_directory_layout(frame, dht_fix_layout_setxattr_cbk, + layout); + if (ret) { + op_errno = ENOTCONN; + goto err; + } + return ret; + } + + tmp = dict_get(xattr, "distribute.directory-spread-count"); + if (tmp) { + /* Setxattr value is packed as 'binary', not string */ + memcpy(value, tmp->data, min(tmp->len, 4095)); + ret = gf_string2uint32(value, &dir_spread); + if (!ret && ((dir_spread <= conf->subvolume_cnt) && (dir_spread > 0))) { + layout->spread_cnt = dir_spread; + + ret = dht_fix_directory_layout(frame, dht_common_setxattr_cbk, + layout); + if (ret) { + op_errno = ENOTCONN; + goto err; + } + return ret; + } + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_OPERATION_NOT_SUP, + "wrong 'directory-spread-count' value (%s)", value); + op_errno = ENOTSUP; + goto err; + } + + tmp = dict_get(xattr, "glusterfs.dht.nuke"); + if (tmp) { + return dht_nuke_dir(frame, this, loc, tmp); + } + local->xattr_req = xdata ? dict_ref(xdata) : dict_new(); + + if (IA_ISDIR(loc->inode->ia_type)) { + local->hashed_subvol = NULL; + ret = dht_dir_common_set_remove_xattr(frame, this, loc, NULL, xattr, + flags, xdata, &op_errno); + if (ret) + goto err; + } else { + local->rebalance.xattr = dict_ref(xattr); + local->rebalance.flags = flags; + local->call_cnt = 1; + + ret = dict_set_int8(local->xattr_req, DHT_IATT_IN_XDATA_KEY, 1); + + STACK_WIND_COOKIE(frame, dht_file_setxattr_cbk, subvol, subvol, + subvol->fops->setxattr, loc, xattr, flags, + local->xattr_req); + } + + return 0; err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (lk, frame, -1, op_errno, NULL); + op_errno = (op_errno == -1) ? errno : op_errno; + DHT_STACK_UNWIND(setxattr, frame, -1, op_errno, NULL); - return 0; + return 0; } +static int +dht_removexattr2(xlator_t *this, xlator_t *subvol, call_frame_t *frame, int ret) +{ + dht_local_t *local = NULL; + int op_errno = EINVAL; -int -dht_statfs_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno, struct statvfs *statvfs) -{ - dht_local_t *local = NULL; - int this_call_cnt = 0; - - - local = frame->local; - - LOCK (&frame->lock); - { - if (op_ret == -1) { - local->op_errno = op_errno; - goto unlock; - } - local->op_ret = 0; - - /* TODO: normalize sizes */ - local->statvfs.f_bsize = statvfs->f_bsize; - local->statvfs.f_frsize = statvfs->f_frsize; - - local->statvfs.f_blocks += statvfs->f_blocks; - local->statvfs.f_bfree += statvfs->f_bfree; - local->statvfs.f_bavail += statvfs->f_bavail; - local->statvfs.f_files += statvfs->f_files; - local->statvfs.f_ffree += statvfs->f_ffree; - local->statvfs.f_favail += statvfs->f_favail; - local->statvfs.f_fsid = statvfs->f_fsid; - local->statvfs.f_flag = statvfs->f_flag; - local->statvfs.f_namemax = statvfs->f_namemax; - - } -unlock: - UNLOCK (&frame->lock); + if (!frame || !frame->local) + goto err; + local = frame->local; + op_errno = local->op_errno; - this_call_cnt = dht_frame_return (frame); - if (is_last_call (this_call_cnt)) - DHT_STACK_UNWIND (statfs, frame, local->op_ret, local->op_errno, - &local->statvfs); + local->call_cnt = 2; /* This is the second attempt */ + if (we_are_not_migrating(ret)) { + /* This dht xlator is not migrating the file. Unwind and + * pass on the original mode bits so the higher DHT layer + * can handle this. + */ + DHT_STACK_UNWIND(removexattr, frame, local->op_ret, local->op_errno, + local->rebalance.xdata); return 0; + } + + if (subvol == NULL) + goto err; + + if (local->fop == GF_FOP_REMOVEXATTR) { + STACK_WIND_COOKIE(frame, dht_file_removexattr_cbk, subvol, subvol, + subvol->fops->removexattr, &local->loc, local->key, + local->xattr_req); + } else { + STACK_WIND_COOKIE(frame, dht_file_removexattr_cbk, subvol, subvol, + subvol->fops->fremovexattr, local->fd, local->key, + local->xattr_req); + } + + return 0; + +err: + DHT_STACK_UNWIND(removexattr, frame, -1, op_errno, NULL); + return 0; } +int +dht_file_removexattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, dict_t *xdata) +{ + int ret = -1; + dht_local_t *local = NULL; + xlator_t *prev = NULL; + struct iatt *stbuf = NULL; + inode_t *inode = NULL; + xlator_t *subvol1 = NULL, *subvol2 = NULL; + + local = frame->local; + prev = cookie; + + local->op_errno = op_errno; + + if ((local->fop == GF_FOP_FREMOVEXATTR) && + dht_check_remote_fd_failed_error(local, op_ret, op_errno)) { + ret = dht_check_and_open_fd_on_subvol(this, frame); + if (ret) + goto out; + return 0; + } + + if ((op_ret == -1) && !dht_inode_missing(op_errno)) { + gf_msg_debug(this->name, op_errno, "subvolume %s returned -1", + prev->name); + goto out; + } + + if (local->call_cnt != 1) + goto out; + + ret = dict_get_bin(xdata, DHT_IATT_IN_XDATA_KEY, (void **)&stbuf); + + if ((!op_ret) && !stbuf) { + goto out; + } + + local->op_ret = 0; + + local->rebalance.target_op_fn = dht_removexattr2; + if (xdata) + local->rebalance.xdata = dict_ref(xdata); + + /* Phase 2 of migration */ + if ((op_ret == -1) || IS_DHT_MIGRATION_PHASE2(stbuf)) { + ret = dht_rebalance_complete_check(this, frame); + if (!ret) + return 0; + } + + /* Phase 1 of migration */ + if (IS_DHT_MIGRATION_PHASE1(stbuf)) { + inode = (local->fd) ? local->fd->inode : local->loc.inode; + + ret = dht_inode_ctx_get_mig_info(this, inode, &subvol1, &subvol2); + if (!dht_mig_info_is_invalid(local->cached_subvol, subvol1, subvol2)) { + dht_removexattr2(this, subvol2, frame, 0); + return 0; + } + + ret = dht_rebalance_in_progress_check(this, frame); + if (!ret) + return 0; + } + +out: + if (local->fop == GF_FOP_REMOVEXATTR) { + DHT_STACK_UNWIND(removexattr, frame, op_ret, op_errno, xdata); + } else { + DHT_STACK_UNWIND(fremovexattr, frame, op_ret, op_errno, xdata); + } + return 0; +} int -dht_statfs (call_frame_t *frame, xlator_t *this, loc_t *loc) +dht_removexattr(call_frame_t *frame, xlator_t *this, loc_t *loc, + const char *key, dict_t *xdata) { - dht_local_t *local = NULL; - dht_conf_t *conf = NULL; - int op_errno = -1; - int i = -1; + xlator_t *subvol = NULL; + int op_errno = -1; + dht_local_t *local = NULL; + dht_layout_t *layout = NULL; + int call_cnt = 0; + dht_conf_t *conf = NULL; + int ret = 0; + + VALIDATE_OR_GOTO(this, err); + VALIDATE_OR_GOTO(this->private, err); + + conf = this->private; + + GF_IF_NATIVE_XATTR_GOTO(conf->wild_xattr_name, key, op_errno, err); + + VALIDATE_OR_GOTO(frame, err); + VALIDATE_OR_GOTO(loc, err); + VALIDATE_OR_GOTO(loc->inode, err); + + local = dht_local_init(frame, loc, NULL, GF_FOP_REMOVEXATTR); + if (!local) { + op_errno = ENOMEM; + goto err; + } + + subvol = local->cached_subvol; + if (!subvol) { + gf_msg_debug(this->name, 0, "no cached subvolume for path=%s", + loc->path); + op_errno = EINVAL; + goto err; + } + + layout = local->layout; + if (!local->layout) { + gf_msg_debug(this->name, 0, "no layout for path=%s", loc->path); + op_errno = EINVAL; + goto err; + } + local->xattr_req = (xdata) ? dict_ref(xdata) : dict_new(); + + local->call_cnt = call_cnt = layout->cnt; + local->key = gf_strdup(key); + + if (key && (strncmp(key, conf->mds_xattr_key, strlen(key)) == 0)) { + op_errno = ENOTSUP; + goto err; + } + + if (IA_ISDIR(loc->inode->ia_type)) { + local->hashed_subvol = NULL; + ret = dht_dir_common_set_remove_xattr(frame, this, loc, NULL, NULL, 0, + local->xattr_req, &op_errno); + if (ret) + goto err; + + } else { + local->call_cnt = 1; + ret = dict_set_int8(local->xattr_req, DHT_IATT_IN_XDATA_KEY, 1); + if (ret) { + gf_msg(this->name, GF_LOG_ERROR, ENOMEM, DHT_MSG_DICT_SET_FAILED, + "Failed to " + "set dictionary key %s for %s", + DHT_IATT_IN_XDATA_KEY, loc->path); + } + + STACK_WIND_COOKIE(frame, dht_file_removexattr_cbk, subvol, subvol, + subvol->fops->removexattr, loc, key, + local->xattr_req); + } + return 0; - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (loc, err); - VALIDATE_OR_GOTO (loc->inode, err); - VALIDATE_OR_GOTO (loc->path, err); +err: + op_errno = (op_errno == -1) ? errno : op_errno; + DHT_STACK_UNWIND(removexattr, frame, -1, op_errno, NULL); - conf = this->private; + return 0; +} - local = dht_local_init (frame); - local->call_cnt = conf->subvolume_cnt; +int +dht_fremovexattr(call_frame_t *frame, xlator_t *this, fd_t *fd, const char *key, + dict_t *xdata) +{ + xlator_t *subvol = NULL; + int op_errno = -1; + dht_local_t *local = NULL; + dht_layout_t *layout = NULL; + int call_cnt = 0; + dht_conf_t *conf = 0; + int ret = 0; + + VALIDATE_OR_GOTO(this, err); + VALIDATE_OR_GOTO(this->private, err); + + conf = this->private; + + GF_IF_NATIVE_XATTR_GOTO(conf->wild_xattr_name, key, op_errno, err); + + VALIDATE_OR_GOTO(frame, err); + + local = dht_local_init(frame, NULL, fd, GF_FOP_FREMOVEXATTR); + if (!local) { + op_errno = ENOMEM; + goto err; + } + + subvol = local->cached_subvol; + if (!subvol) { + gf_msg_debug(this->name, 0, "no cached subvolume for inode=%s", + uuid_utoa(fd->inode->gfid)); + op_errno = EINVAL; + goto err; + } + + layout = local->layout; + if (!local->layout) { + gf_msg_debug(this->name, 0, "no layout for inode=%s", + uuid_utoa(fd->inode->gfid)); + op_errno = EINVAL; + goto err; + } + local->xattr_req = xdata ? dict_ref(xdata) : dict_new(); + + local->call_cnt = call_cnt = layout->cnt; + local->key = gf_strdup(key); + + if (IA_ISDIR(fd->inode->ia_type)) { + local->hashed_subvol = NULL; + ret = dht_dir_common_set_remove_xattr(frame, this, NULL, fd, NULL, 0, + local->xattr_req, &op_errno); + if (ret) + goto err; + + } else { + local->call_cnt = 1; + ret = dict_set_int8(local->xattr_req, DHT_IATT_IN_XDATA_KEY, 1); + if (ret) { + gf_msg(this->name, GF_LOG_ERROR, ENOMEM, DHT_MSG_DICT_SET_FAILED, + "Failed to " + "set dictionary key %s for fd=%p", + DHT_IATT_IN_XDATA_KEY, fd); + } - for (i = 0; i < conf->subvolume_cnt; i++) { - STACK_WIND (frame, dht_statfs_cbk, - conf->subvolumes[i], - conf->subvolumes[i]->fops->statfs, loc); - } + STACK_WIND_COOKIE(frame, dht_file_removexattr_cbk, subvol, subvol, + subvol->fops->fremovexattr, fd, key, + local->xattr_req); + } - return 0; + return 0; err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (statfs, frame, -1, op_errno, NULL); + op_errno = (op_errno == -1) ? errno : op_errno; + DHT_STACK_UNWIND(fremovexattr, frame, -1, op_errno, NULL); - return 0; + return 0; } +int +dht_fd_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, + int op_errno, fd_t *fd, dict_t *xdata) +{ + dht_local_t *local = NULL; + int this_call_cnt = 0; + xlator_t *prev = NULL; + + local = frame->local; + prev = cookie; + + LOCK(&frame->lock); + { + if (op_ret == -1) { + local->op_errno = op_errno; + UNLOCK(&frame->lock); + gf_msg_debug(this->name, op_errno, "subvolume %s returned -1", + prev->name); + goto post_unlock; + } + + local->op_ret = 0; + } + UNLOCK(&frame->lock); +post_unlock: + this_call_cnt = dht_frame_return(frame); + if (is_last_call(this_call_cnt)) + DHT_STACK_UNWIND(open, frame, local->op_ret, local->op_errno, local->fd, + NULL); + + return 0; +} + +/* + * dht_normalize_stats - + */ +static void +dht_normalize_stats(struct statvfs *buf, unsigned long bsize, + unsigned long frsize) +{ + double factor = 0; + + if (buf->f_bsize != bsize) { + buf->f_bsize = bsize; + } + + if (buf->f_frsize != frsize) { + factor = ((double)buf->f_frsize) / frsize; + buf->f_frsize = frsize; + buf->f_blocks = (fsblkcnt_t)(factor * buf->f_blocks); + buf->f_bfree = (fsblkcnt_t)(factor * buf->f_bfree); + buf->f_bavail = (fsblkcnt_t)(factor * buf->f_bavail); + } +} + +static int +dht_statfs_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, + int op_errno, struct statvfs *statvfs, dict_t *xdata) +{ + gf_boolean_t event = _gf_false; + qdstatfs_action_t action = qdstatfs_action_OFF; + dht_local_t *local = NULL; + int this_call_cnt = 0; + int bsize = 0; + int frsize = 0; + GF_UNUSED int ret = 0; + unsigned long new_usage = 0; + unsigned long cur_usage = 0; + + local = frame->local; + GF_ASSERT(local); + + if (xdata) + ret = dict_get_int8(xdata, "quota-deem-statfs", (int8_t *)&event); + + LOCK(&frame->lock); + { + if (op_ret == -1) { + local->op_errno = op_errno; + goto unlock; + } + if (!statvfs) { + op_errno = EINVAL; + local->op_ret = -1; + goto unlock; + } + local->op_ret = 0; + + if (local->quota_deem_statfs) { + if (event == _gf_true) { + action = qdstatfs_action_COMPARE; + } else { + action = qdstatfs_action_NEGLECT; + } + } else { + if (event == _gf_true) { + action = qdstatfs_action_REPLACE; + local->quota_deem_statfs = _gf_true; + } + } + + if (local->quota_deem_statfs) { + switch (action) { + case qdstatfs_action_NEGLECT: + goto unlock; + + case qdstatfs_action_REPLACE: + local->statvfs = *statvfs; + goto unlock; + + case qdstatfs_action_COMPARE: + new_usage = statvfs->f_blocks - statvfs->f_bfree; + cur_usage = local->statvfs.f_blocks - + local->statvfs.f_bfree; + + /* Take the max of the usage from subvols */ + if (new_usage >= cur_usage) + local->statvfs = *statvfs; + goto unlock; + + default: + break; + } + } + + if (local->statvfs.f_bsize != 0) { + bsize = max(local->statvfs.f_bsize, statvfs->f_bsize); + frsize = max(local->statvfs.f_frsize, statvfs->f_frsize); + dht_normalize_stats(&local->statvfs, bsize, frsize); + dht_normalize_stats(statvfs, bsize, frsize); + } else { + local->statvfs.f_bsize = statvfs->f_bsize; + local->statvfs.f_frsize = statvfs->f_frsize; + } + + local->statvfs.f_blocks += statvfs->f_blocks; + local->statvfs.f_bfree += statvfs->f_bfree; + local->statvfs.f_bavail += statvfs->f_bavail; + local->statvfs.f_files += statvfs->f_files; + local->statvfs.f_ffree += statvfs->f_ffree; + local->statvfs.f_favail += statvfs->f_favail; + local->statvfs.f_fsid = statvfs->f_fsid; + local->statvfs.f_flag = statvfs->f_flag; + local->statvfs.f_namemax = statvfs->f_namemax; + } +unlock: + UNLOCK(&frame->lock); + + this_call_cnt = dht_frame_return(frame); + if (is_last_call(this_call_cnt)) + DHT_STACK_UNWIND(statfs, frame, local->op_ret, local->op_errno, + &local->statvfs, xdata); + + return 0; +} int -dht_opendir (call_frame_t *frame, xlator_t *this, loc_t *loc, fd_t *fd) +dht_statfs(call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xdata) { - dht_local_t *local = NULL; - dht_conf_t *conf = NULL; - int ret = -1; - int op_errno = -1; - int i = -1; + dht_local_t *local = NULL; + dht_conf_t *conf = NULL; + int op_errno = -1; + int i = -1; + inode_t *inode = NULL; + inode_table_t *itable = NULL; + static uuid_t root_gfid = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1}; + loc_t newloc = { + 0, + }; + + VALIDATE_OR_GOTO(frame, err); + VALIDATE_OR_GOTO(this, err); + VALIDATE_OR_GOTO(loc, err); + VALIDATE_OR_GOTO(this->private, err); + + conf = this->private; + + local = dht_local_init(frame, NULL, NULL, GF_FOP_STATFS); + if (!local) { + op_errno = ENOMEM; + goto err; + } + + if (loc->inode && !IA_ISDIR(loc->inode->ia_type)) { + itable = loc->inode->table; + if (!itable) { + op_errno = EINVAL; + goto err; + } + + loc = &local->loc2; + + inode = inode_find(itable, root_gfid); + if (!inode) { + op_errno = EINVAL; + goto err; + } + + dht_build_root_loc(inode, &newloc); + loc = &newloc; + } + local->call_cnt = conf->subvolume_cnt; - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (fd, err); + for (i = 0; i < conf->subvolume_cnt; i++) { + STACK_WIND(frame, dht_statfs_cbk, conf->subvolumes[i], + conf->subvolumes[i]->fops->statfs, loc, xdata); + } + return 0; - conf = this->private; +err: + op_errno = (op_errno == -1) ? errno : op_errno; + DHT_STACK_UNWIND(statfs, frame, -1, op_errno, NULL, NULL); - local = dht_local_init (frame); - if (!local) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } + return 0; +} - local->fd = fd_ref (fd); - ret = loc_dup (loc, &local->loc); - if (ret == -1) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } +int +dht_opendir(call_frame_t *frame, xlator_t *this, loc_t *loc, fd_t *fd, + dict_t *xdata) +{ + dht_local_t *local = NULL; + dht_conf_t *conf = NULL; + int op_errno = -1; + int i = -1; + int ret = 0; + gf_boolean_t new_xdata = _gf_false; + xlator_t **subvolumes = NULL; + int call_count = 0; + + VALIDATE_OR_GOTO(frame, err); + VALIDATE_OR_GOTO(this, err); + VALIDATE_OR_GOTO(fd, err); + VALIDATE_OR_GOTO(this->private, err); + + conf = this->private; + + local = dht_local_init(frame, loc, fd, GF_FOP_OPENDIR); + if (!local) { + op_errno = ENOMEM; + goto err; + } + local->first_up_subvol = dht_first_up_subvol(this); + + if (!xdata) { + xdata = dict_new(); + if (!xdata) { + op_errno = ENOMEM; + goto err; + } + new_xdata = _gf_true; + } + + ret = dict_set_uint32(xdata, conf->link_xattr_name, 256); + if (ret) + gf_msg(this->name, GF_LOG_WARNING, 0, DHT_MSG_DICT_SET_FAILED, + "Failed to set dictionary value : key = %s", + conf->link_xattr_name); + + /* dht_readdirp will wind to all subvols so open has to be sent to + * all subvols whether or not conf->local_subvols is set */ + + call_count = local->call_cnt = conf->subvolume_cnt; + subvolumes = conf->subvolumes; + + /* In case of parallel-readdir, the readdir-ahead will be loaded + * below dht, in this case, if we want to enable or disable SKIP_DIRs + * it has to be done in opendir, so that prefetching logic in + * readdir-ahead, honors it */ + for (i = 0; i < call_count; i++) { + if (conf->readdir_optimize == _gf_true) { + if (subvolumes[i] != local->first_up_subvol) { + ret = dict_set_int32(xdata, GF_READDIR_SKIP_DIRS, 1); + if (ret) + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_DICT_SET_FAILED, + "Failed to set dictionary" + " value :key = %s, ret:%d", + GF_READDIR_SKIP_DIRS, ret); + } + } - local->call_cnt = conf->subvolume_cnt; + STACK_WIND_COOKIE(frame, dht_fd_cbk, subvolumes[i], subvolumes[i], + subvolumes[i]->fops->opendir, loc, fd, xdata); + dict_del(xdata, GF_READDIR_SKIP_DIRS); + } - for (i = 0; i < conf->subvolume_cnt; i++) { - STACK_WIND (frame, dht_fd_cbk, - conf->subvolumes[i], - conf->subvolumes[i]->fops->opendir, - loc, fd); - } + if (new_xdata) + dict_unref(xdata); - return 0; + return 0; err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (opendir, frame, -1, op_errno, NULL); + op_errno = (op_errno == -1) ? errno : op_errno; + DHT_STACK_UNWIND(opendir, frame, -1, op_errno, NULL, NULL); - return 0; + return 0; } +/* dht_readdirp_cbk creates a new dentry and dentry->inode is not assigned. + This functions assigns an inode if all of the following conditions are + true: -int -dht_readdirp_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, - int op_errno, gf_dirent_t *orig_entries) -{ - dht_local_t *local = NULL; - gf_dirent_t entries; - gf_dirent_t *orig_entry = NULL; - gf_dirent_t *entry = NULL; - call_frame_t *prev = NULL; - xlator_t *next_subvol = NULL; - off_t next_offset = 0; - int count = 0; - dht_layout_t *layout = 0; - dht_conf_t *conf = NULL; - xlator_t *subvol = 0; - - INIT_LIST_HEAD (&entries.list); - prev = cookie; - local = frame->local; - conf = this->private; - - if (op_ret < 0) - goto done; - - if (!local->layout) - local->layout = layout = dht_layout_get (this, local->fd->inode); - else - layout = local->layout; + * DHT has only one child. In this case the entire layout is present on + this single child and hence we can set complete layout in inode. + * backend has complete layout and there are no anomalies in it and from + this information layout can be constructed and set in inode. +*/ - list_for_each_entry (orig_entry, (&orig_entries->list), list) { - next_offset = orig_entry->d_off; +static void +dht_populate_inode_for_dentry(xlator_t *this, xlator_t *subvol, + gf_dirent_t *entry, gf_dirent_t *orig_entry) +{ + dht_layout_t *layout = NULL; + int ret = 0; + loc_t loc = { + 0, + }; + + if (gf_uuid_is_null(orig_entry->d_stat.ia_gfid)) { + /* this skips the '..' entry for the root of the volume */ + return; + } + + gf_uuid_copy(loc.gfid, orig_entry->d_stat.ia_gfid); + loc.inode = inode_ref(orig_entry->inode); + + if (is_revalidate(&loc)) { + goto out; + } + + layout = dht_layout_new(this, 1); + if (!layout) + goto out; + + ret = dht_layout_merge(this, layout, subvol, 0, 0, orig_entry->dict); + if (!ret) { + ret = dht_layout_normalize(this, &loc, layout); + if (ret == 0) { + dht_layout_set(this, orig_entry->inode, layout); + entry->inode = inode_ref(orig_entry->inode); + layout = NULL; + } + } - if (check_is_linkfile (NULL, (&orig_entry->d_stat), NULL) - || (check_is_dir (NULL, (&orig_entry->d_stat), NULL) - && (prev->this != dht_first_up_subvol (this)))) { - continue; - } + if (layout) + dht_layout_unref(this, layout); - entry = gf_dirent_for_name (orig_entry->d_name); - if (!entry) { - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto unwind; - } +out: + loc_wipe(&loc); + return; +} - /* Do this if conf->search_unhashed is set to "auto" */ - if (conf->search_unhashed == GF_DHT_LOOKUP_UNHASHED_AUTO) { - subvol = dht_layout_search (this, layout, - orig_entry->d_name); - if (!subvol || (subvol != prev->this)) { - /* TODO: Count the number of entries which need - linkfile to prove its existance in fs */ - layout->search_unhashed++; - } - } +/* Posix returns op_errno = ENOENT to indicate that there are no more + * entries + */ +static int +dht_readdirp_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, + int op_errno, gf_dirent_t *orig_entries, dict_t *xdata) +{ + dht_local_t *local = NULL; + gf_dirent_t entries; + gf_dirent_t *orig_entry = NULL; + gf_dirent_t *entry = NULL; + xlator_t *prev = NULL; + xlator_t *next_subvol = NULL; + off_t next_offset = 0; + int count = 0; + dht_layout_t *layout = NULL; + dht_conf_t *conf = NULL; + dht_methods_t *methods = NULL; + xlator_t *subvol = 0; + xlator_t *hashed_subvol = 0; + int ret = 0; + int readdir_optimize = 0; + inode_table_t *itable = NULL; + inode_t *inode = NULL; + gf_boolean_t skip_hashed_check = _gf_false; + + INIT_LIST_HEAD(&entries.list); + + prev = cookie; + local = frame->local; + GF_VALIDATE_OR_GOTO(this->name, local->fd, unwind); + + itable = local->fd->inode->table; + + conf = this->private; + GF_VALIDATE_OR_GOTO(this->name, conf, unwind); + + methods = &(conf->methods); + + if (op_ret <= 0) { + goto done; + } + + /* Why aren't we skipping DHT entirely in case of a single subvol? + * Because if this was a larger volume earlier and all but one subvol + * was removed, there might be stale linkto files on the subvol. + */ + if (conf->subvolume_cnt == 1) { + /* return all directory and file entries except + * linkto files for a single child DHT + */ + skip_hashed_check = _gf_true; + } + + if (!local->layout) + local->layout = dht_layout_get(this, local->fd->inode); + + layout = local->layout; + + /* This will skip the entries on the subvol without a layout, + * hence preventing the crash but rmdir might fail with + * "directory not empty" errors*/ + + if (layout == NULL) + goto done; + + if (conf->readdir_optimize == _gf_true) + readdir_optimize = 1; + + gf_msg_debug(this->name, 0, "Processing entries from %s", prev->name); + + list_for_each_entry(orig_entry, (&orig_entries->list), list) + { + next_offset = orig_entry->d_off; + + gf_msg_debug(this->name, 0, "%s: entry = %s, type = %d", prev->name, + orig_entry->d_name, orig_entry->d_type); + + if (IA_ISINVAL(orig_entry->d_stat.ia_type)) { + /*stat failed somewhere- display this entry but the data may + * be inaccurate. + */ + gf_msg_debug(this->name, EINVAL, "Invalid stat for %s (gfid %s)", + orig_entry->d_name, + uuid_utoa(orig_entry->d_stat.ia_gfid)); + } - entry->d_stat = orig_entry->d_stat; + if (check_is_linkfile(NULL, (&orig_entry->d_stat), orig_entry->dict, + conf->link_xattr_name)) { + gf_msg_debug(this->name, 0, "%s: %s is a linkto file", prev->name, + orig_entry->d_name); + continue; + } - dht_itransform (this, prev->this, orig_entry->d_ino, - &entry->d_ino); - dht_itransform (this, prev->this, orig_entry->d_off, - &entry->d_off); + if (skip_hashed_check) { + goto list; + } - entry->d_stat.st_ino = entry->d_ino; - entry->d_type = orig_entry->d_type; - entry->d_len = orig_entry->d_len; + if (check_is_dir(NULL, (&orig_entry->d_stat), NULL)) { + /*Directory entries filtering : + * a) If rebalance is running, pick from first_up_subvol + * b) (rebalance not running)hashed subvolume is NULL or + * down then filter in first_up_subvolume. Other wise the + * corresponding hashed subvolume will take care of the + * directory entry. + */ + if (readdir_optimize) { + if (prev == local->first_up_subvol) + goto list; + else + continue; + } + + hashed_subvol = methods->layout_search(this, layout, + orig_entry->d_name); + + if (prev == hashed_subvol) + goto list; + if ((hashed_subvol && dht_subvol_status(conf, hashed_subvol)) || + (prev != local->first_up_subvol)) + continue; + + goto list; + } - list_add_tail (&entry->list, &entries.list); - count++; - } - op_ret = count; + list: + entry = gf_dirent_for_name(orig_entry->d_name); + if (!entry) { + goto unwind; + } -done: - if (count == 0) { - /* non-zero next_offset means that - EOF is not yet hit on the current subvol - */ - if (next_offset == 0) { - next_subvol = dht_subvol_next (this, prev->this); - } else { - next_subvol = prev->this; + /* Do this if conf->search_unhashed is set to "auto" */ + if (conf->search_unhashed == GF_DHT_LOOKUP_UNHASHED_AUTO) { + subvol = methods->layout_search(this, layout, orig_entry->d_name); + if (!subvol || (subvol != prev)) { + /* TODO: Count the number of entries which need + linkfile to prove its existence in fs */ + layout->search_unhashed++; + } + } + + entry->d_off = orig_entry->d_off; + entry->d_stat = orig_entry->d_stat; + entry->d_ino = orig_entry->d_ino; + entry->d_type = orig_entry->d_type; + entry->d_len = orig_entry->d_len; + + if (orig_entry->dict) + entry->dict = dict_ref(orig_entry->dict); + + /* making sure we set the inode ctx right with layout, + currently possible only for non-directories, so for + directories don't set entry inodes */ + if (IA_ISDIR(entry->d_stat.ia_type)) { + entry->d_stat.ia_blocks = DHT_DIR_STAT_BLOCKS; + entry->d_stat.ia_size = DHT_DIR_STAT_SIZE; + if (orig_entry->inode) { + dht_inode_ctx_time_update(orig_entry->inode, this, + &entry->d_stat, 1); + + if (conf->subvolume_cnt == 1) { + dht_populate_inode_for_dentry(this, prev, entry, + orig_entry); } + } + } else { + if (orig_entry->dict && + dict_get(orig_entry->dict, conf->link_xattr_name)) { + /* Strip out the S and T flags set by rebalance*/ + DHT_STRIP_PHASE1_FLAGS(&entry->d_stat); + } + + if (orig_entry->inode) { + ret = dht_layout_preset(this, prev, orig_entry->inode); + if (ret) + gf_msg(this->name, GF_LOG_WARNING, 0, + DHT_MSG_LAYOUT_SET_FAILED, + "failed to link the layout " + "in inode for %s", + orig_entry->d_name); + + entry->inode = inode_ref(orig_entry->inode); + } else if (itable) { + /* + * orig_entry->inode might be null if any upper + * layer xlators below client set to null, to + * force a lookup on the inode even if the inode + * is present in the inode table. In that case + * we just update the ctx to make sure we didn't + * missed anything. + */ + inode = inode_find(itable, orig_entry->d_stat.ia_gfid); + if (inode) { + ret = dht_layout_preset(this, prev, inode); + if (ret) + gf_msg(this->name, GF_LOG_WARNING, 0, + DHT_MSG_LAYOUT_SET_FAILED, + "failed to link the layout" + " in inode for %s", + orig_entry->d_name); + inode_unref(inode); + inode = NULL; + } + } + } - if (!next_subvol) { - goto unwind; - } + gf_msg_debug(this->name, 0, "%s: Adding entry = %s", prev->name, + entry->d_name); - STACK_WIND (frame, dht_readdirp_cbk, - next_subvol, next_subvol->fops->readdirp, - local->fd, local->size, next_offset); - return 0; - } + list_add_tail(&entry->list, &entries.list); + count++; + } -unwind: - if (op_ret < 0) - op_ret = 0; +done: - DHT_STACK_UNWIND (readdirp, frame, op_ret, op_errno, &entries); + /* We need to ensure that only the last subvolume's end-of-directory + * notification is respected so that directory reading does not stop + * before all subvolumes have been read. That could happen because the + * posix for each subvolume sends a ENOENT on end-of-directory but in + * distribute we're not concerned only with a posix's view of the + * directory but the aggregated namespace' view of the directory. + * Possible values: + * op_ret == 0 and op_errno != 0 + * if op_errno != ENOENT : Error.Unwind. + * if op_errno == ENOENT : There are no more entries on this subvol. + * Move to the next one. + * op_ret > 0 and count == 0 : + * The subvol returned entries to dht but all were stripped out. + * For example, if they were linkto files or dirs where + * hashed_subvol != prev. Try to get some entries by winding + * to the next subvol. This can be dangerous if parallel readdir + * is enabled as it grows the stack. + * + * op_ret > 0 and count > 0: + * We found some entries. Unwind even if the buffer is not full. + * + */ + + op_ret = count; + if (count == 0) { + /* non-zero next_offset means that + * EOF is not yet hit on the current subvol + */ + if ((next_offset == 0) || (op_errno == ENOENT)) { + next_offset = 0; + next_subvol = dht_subvol_next(this, prev); + } else { + next_subvol = prev; + } + + if (!next_subvol) { + goto unwind; + } - gf_dirent_free (&entries); + if (conf->readdir_optimize == _gf_true) { + if (next_subvol != local->first_up_subvol) { + ret = dict_set_int32(local->xattr, GF_READDIR_SKIP_DIRS, 1); + if (ret) + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_DICT_SET_FAILED, + "Failed to set dictionary value" + ":key = %s", + GF_READDIR_SKIP_DIRS); + } else { + dict_del(local->xattr, GF_READDIR_SKIP_DIRS); + } + } + STACK_WIND_COOKIE(frame, dht_readdirp_cbk, next_subvol, next_subvol, + next_subvol->fops->readdirp, local->fd, local->size, + next_offset, local->xattr); return 0; + } + +unwind: + /* We need to ensure that only the last subvolume's end-of-directory + * notification is respected so that directory reading does not stop + * before all subvolumes have been read. That could happen because the + * posix for each subvolume sends a ENOENT on end-of-directory but in + * distribute we're not concerned only with a posix's view of the + * directory but the aggregated namespace' view of the directory. + */ + if (op_ret < 0) + op_ret = 0; + + if (prev != dht_last_up_subvol(this)) + op_errno = 0; + + DHT_STACK_UNWIND(readdirp, frame, op_ret, op_errno, &entries, NULL); + + gf_dirent_free(&entries); + return 0; } +static int +dht_readdir_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, + int op_errno, gf_dirent_t *orig_entries, dict_t *xdata) +{ + dht_local_t *local = NULL; + gf_dirent_t entries; + gf_dirent_t *orig_entry = NULL; + gf_dirent_t *entry = NULL; + xlator_t *prev = NULL; + xlator_t *next_subvol = NULL; + off_t next_offset = 0; + int count = 0; + dht_layout_t *layout = 0; + xlator_t *subvol = 0; + dht_conf_t *conf = NULL; + dht_methods_t *methods = NULL; + gf_boolean_t skip_hashed_check = _gf_false; + INIT_LIST_HEAD(&entries.list); -int -dht_readdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno, gf_dirent_t *orig_entries) -{ - dht_local_t *local = NULL; - gf_dirent_t entries; - gf_dirent_t *orig_entry = NULL; - gf_dirent_t *entry = NULL; - call_frame_t *prev = NULL; - xlator_t *next_subvol = NULL; - off_t next_offset = 0; - int count = 0; - dht_layout_t *layout = 0; - dht_conf_t *conf = NULL; - xlator_t *subvol = 0; - - INIT_LIST_HEAD (&entries.list); - prev = cookie; - local = frame->local; - conf = this->private; - - if (op_ret < 0) - goto done; - - if (!local->layout) - local->layout = layout = dht_layout_get (this, local->fd->inode); - else - layout = local->layout; + prev = cookie; + local = frame->local; - list_for_each_entry (orig_entry, (&orig_entries->list), list) { - next_offset = orig_entry->d_off; + conf = this->private; + GF_VALIDATE_OR_GOTO(this->name, conf, done); - subvol = dht_layout_search (this, layout, orig_entry->d_name); + methods = &(conf->methods); - if (!subvol || (subvol == prev->this)) { - entry = gf_dirent_for_name (orig_entry->d_name); - if (!entry) { - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto unwind; - } + if (op_ret <= 0) + goto done; - dht_itransform (this, prev->this, orig_entry->d_ino, - &entry->d_ino); - dht_itransform (this, prev->this, orig_entry->d_off, - &entry->d_off); + if (!local->layout) + local->layout = dht_layout_get(this, local->fd->inode); - entry->d_type = orig_entry->d_type; - entry->d_len = orig_entry->d_len; + layout = local->layout; - list_add_tail (&entry->list, &entries.list); - count++; - } - } - op_ret = count; + gf_msg_debug(this->name, 0, "Processing entries from %s", prev->name); + if (conf->subvolume_cnt == 1) { + /*return everything*/ + skip_hashed_check = _gf_true; + count = op_ret; + goto done; + } + + list_for_each_entry(orig_entry, (&orig_entries->list), list) + { + next_offset = orig_entry->d_off; + + gf_msg_debug(this->name, 0, "%s: entry = %s, type = %d", prev->name, + orig_entry->d_name, orig_entry->d_type); + + subvol = methods->layout_search(this, layout, orig_entry->d_name); + + if (!subvol || (subvol == prev)) { + entry = gf_dirent_for_name(orig_entry->d_name); + if (!entry) { + gf_msg(this->name, GF_LOG_ERROR, ENOMEM, DHT_MSG_NO_MEMORY, + "Memory allocation failed "); + goto unwind; + } + + entry->d_off = orig_entry->d_off; + entry->d_ino = orig_entry->d_ino; + entry->d_type = orig_entry->d_type; + entry->d_len = orig_entry->d_len; + + gf_msg_debug(this->name, 0, "%s: Adding = entry %s", prev->name, + entry->d_name); + + list_add_tail(&entry->list, &entries.list); + count++; + } + } done: - if (count == 0) { - /* non-zero next_offset means that - EOF is not yet hit on the current subvol - */ - if (next_offset == 0) { - next_subvol = dht_subvol_next (this, prev->this); - } else { - next_subvol = prev->this; - } + op_ret = count; + /* We need to ensure that only the last subvolume's end-of-directory + * notification is respected so that directory reading does not stop + * before all subvolumes have been read. That could happen because the + * posix for each subvolume sends a ENOENT on end-of-directory but in + * distribute we're not concerned only with a posix's view of the + * directory but the aggregated namespace' view of the directory. + */ + if (count == 0) { + if ((next_offset == 0) || (op_errno == ENOENT)) { + next_offset = 0; + next_subvol = dht_subvol_next(this, prev); + } else { + next_subvol = prev; + } - if (!next_subvol) { - goto unwind; - } + if (!next_subvol) { + goto unwind; + } - STACK_WIND (frame, dht_readdir_cbk, - next_subvol, next_subvol->fops->readdir, - local->fd, local->size, next_offset); - return 0; - } + STACK_WIND_COOKIE(frame, dht_readdir_cbk, next_subvol, next_subvol, + next_subvol->fops->readdir, local->fd, local->size, + next_offset, NULL); + return 0; + } unwind: - if (op_ret < 0) - op_ret = 0; + /* We need to ensure that only the last subvolume's end-of-directory + * notification is respected so that directory reading does not stop + * before all subvolumes have been read. That could happen because the + * posix for each subvolume sends a ENOENT on end-of-directory but in + * distribute we're not concerned only with a posix's view of the + * directory but the aggregated namespace' view of the directory. + */ + + if (prev != dht_last_up_subvol(this)) + op_errno = 0; + + if (!skip_hashed_check) { + DHT_STACK_UNWIND(readdir, frame, op_ret, op_errno, &entries, NULL); + gf_dirent_free(&entries); + + } else { + DHT_STACK_UNWIND(readdir, frame, op_ret, op_errno, orig_entries, NULL); + } + return 0; +} - DHT_STACK_UNWIND (readdir, frame, op_ret, op_errno, &entries); +static int +dht_do_readdir(call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size, + off_t yoff, int whichop, dict_t *dict) +{ + dht_local_t *local = NULL; + int op_errno = -1; + xlator_t *xvol = NULL; + int ret = 0; + dht_conf_t *conf = NULL; + + VALIDATE_OR_GOTO(frame, err); + VALIDATE_OR_GOTO(this, err); + VALIDATE_OR_GOTO(fd, err); + VALIDATE_OR_GOTO(this->private, err); + + conf = this->private; + + local = dht_local_init(frame, NULL, NULL, whichop); + if (!local) { + op_errno = ENOMEM; + goto err; + } + + local->fd = fd_ref(fd); + local->size = size; + local->xattr_req = (dict) ? dict_ref(dict) : NULL; + local->first_up_subvol = dht_first_up_subvol(this); + local->op_ret = -1; + + dht_deitransform(this, yoff, &xvol); + + /* TODO: do proper readdir */ + if (whichop == GF_FOP_READDIRP) { + if (dict) + local->xattr = dict_ref(dict); + else + local->xattr = dict_new(); + + if (local->xattr) { + ret = dict_set_uint32(local->xattr, conf->link_xattr_name, 256); + if (ret) + gf_msg(this->name, GF_LOG_WARNING, 0, DHT_MSG_DICT_SET_FAILED, + "Failed to set dictionary value" + " : key = %s", + conf->link_xattr_name); + + if (conf->readdir_optimize == _gf_true) { + if (xvol != local->first_up_subvol) { + ret = dict_set_int32(local->xattr, GF_READDIR_SKIP_DIRS, 1); + if (ret) + gf_msg(this->name, GF_LOG_ERROR, 0, + DHT_MSG_DICT_SET_FAILED, + "Failed to set " + "dictionary value: " + "key = %s", + GF_READDIR_SKIP_DIRS); + } else { + dict_del(local->xattr, GF_READDIR_SKIP_DIRS); + } + } + + if (conf->subvolume_cnt == 1) { + ret = dict_set_uint32(local->xattr, conf->xattr_name, 4 * 4); + if (ret) { + gf_msg(this->name, GF_LOG_WARNING, ENOMEM, + DHT_MSG_DICT_SET_FAILED, + "Failed to set dictionary " + "value:key = %s ", + conf->xattr_name); + } + } + } - gf_dirent_free (&entries); + STACK_WIND_COOKIE(frame, dht_readdirp_cbk, xvol, xvol, + xvol->fops->readdirp, fd, size, yoff, local->xattr); + } else { + STACK_WIND_COOKIE(frame, dht_readdir_cbk, xvol, xvol, + xvol->fops->readdir, fd, size, yoff, local->xattr); + } - return 0; + return 0; + +err: + op_errno = (op_errno == -1) ? errno : op_errno; + DHT_STACK_UNWIND(readdir, frame, -1, op_errno, NULL, NULL); + + return 0; } +int +dht_readdir(call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size, + off_t yoff, dict_t *xdata) +{ + int op = GF_FOP_READDIR; + dht_conf_t *conf = NULL; + int i = 0; + + conf = this->private; + if (!conf) + goto out; + + for (i = 0; i < conf->subvolume_cnt; i++) { + if (!conf->subvolume_status[i]) { + op = GF_FOP_READDIRP; + break; + } + } + + if (conf->use_readdirp) + op = GF_FOP_READDIRP; + +out: + dht_do_readdir(frame, this, fd, size, yoff, op, 0); + return 0; +} int -dht_do_readdir (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size, - off_t yoff, int whichop) +dht_readdirp(call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size, + off_t yoff, dict_t *dict) +{ + dht_do_readdir(frame, this, fd, size, yoff, GF_FOP_READDIRP, dict); + return 0; +} + +static int +dht_fsyncdir_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, + int op_errno, dict_t *xdata) { - dht_local_t *local = NULL; - dht_conf_t *conf = NULL; - int op_errno = -1; - xlator_t *xvol = NULL; - off_t xoff = 0; + dht_local_t *local = NULL; + int this_call_cnt = 0; + local = frame->local; - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (fd, err); + LOCK(&frame->lock); + { + if (op_ret == -1) + local->op_errno = op_errno; + else if (op_ret == 0) + local->op_ret = 0; + } + UNLOCK(&frame->lock); + this_call_cnt = dht_frame_return(frame); + if (is_last_call(this_call_cnt)) + DHT_STACK_UNWIND(fsyncdir, frame, local->op_ret, local->op_errno, + xdata); + + return 0; +} - conf = this->private; +int +dht_fsyncdir(call_frame_t *frame, xlator_t *this, fd_t *fd, int datasync, + dict_t *xdata) +{ + dht_local_t *local = NULL; + dht_conf_t *conf = NULL; + int op_errno = -1; + int i = -1; - local = dht_local_init (frame); - if (!local) { - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - op_errno = ENOMEM; - goto err; - } + VALIDATE_OR_GOTO(frame, err); + VALIDATE_OR_GOTO(this, err); + VALIDATE_OR_GOTO(fd, err); + VALIDATE_OR_GOTO(this->private, err); - local->fd = fd_ref (fd); - local->size = size; + conf = this->private; - dht_deitransform (this, yoff, &xvol, (uint64_t *)&xoff); + local = dht_local_init(frame, NULL, NULL, GF_FOP_FSYNCDIR); + if (!local) { + op_errno = ENOMEM; + goto err; + } - /* TODO: do proper readdir */ - if (whichop == GF_FOP_READDIR) - STACK_WIND (frame, dht_readdir_cbk, xvol, xvol->fops->readdir, - fd, size, xoff); - else - STACK_WIND (frame, dht_readdirp_cbk, xvol, xvol->fops->readdirp, - fd, size, xoff); + local->fd = fd_ref(fd); + local->call_cnt = conf->subvolume_cnt; - return 0; + for (i = 0; i < conf->subvolume_cnt; i++) { + STACK_WIND(frame, dht_fsyncdir_cbk, conf->subvolumes[i], + conf->subvolumes[i]->fops->fsyncdir, fd, datasync, xdata); + } + + return 0; err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (readdir, frame, -1, op_errno, NULL); + op_errno = (op_errno == -1) ? errno : op_errno; + DHT_STACK_UNWIND(fsyncdir, frame, -1, op_errno, NULL); - return 0; + return 0; } - int -dht_readdir (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size, - off_t yoff) +dht_newfile_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, + int op_errno, inode_t *inode, struct iatt *stbuf, + struct iatt *preparent, struct iatt *postparent, dict_t *xdata) { - int op = GF_FOP_READDIR; - dht_conf_t *conf = NULL; - int i = 0; - - conf = this->private; + xlator_t *prev = NULL; + int ret = -1; + dht_local_t *local = NULL; + + if (op_ret == -1) + goto out; + + local = frame->local; + if (!local) { + op_ret = -1; + op_errno = EINVAL; + goto out; + } + + prev = cookie; + + if (local->loc.parent) { + dht_inode_ctx_time_update(local->loc.parent, this, preparent, 0); + dht_inode_ctx_time_update(local->loc.parent, this, postparent, 1); + } + + ret = dht_layout_preset(this, prev, inode); + if (ret < 0) { + gf_msg_debug(this->name, EINVAL, + "could not set pre-set layout for subvolume %s", + prev ? prev->name : NULL); + op_ret = -1; + op_errno = EINVAL; + goto out; + } + if (local->linked == _gf_true) + dht_linkfile_attr_heal(frame, this); +out: + /* + * FIXME: ia_size and st_blocks of preparent and postparent do not have + * correct values. since, preparent and postparent buffers correspond + * to a directory these two members should have values equal to sum of + * corresponding values from each of the subvolume. + * See dht_iatt_merge for reference. + */ + DHT_STRIP_PHASE1_FLAGS(stbuf); + dht_set_fixed_dir_stat(postparent); + dht_set_fixed_dir_stat(preparent); + + if (local && local->lock[0].layout.parent_layout.locks) { + /* store op_errno for failure case*/ + local->op_errno = op_errno; + local->refresh_layout_unlock(frame, this, op_ret, 1); - for (i = 0; i < conf->subvolume_cnt; i++) { - if (!conf->subvolume_status[i]) { - op = GF_FOP_READDIRP; - break; - } + if (op_ret == 0) { + DHT_STACK_UNWIND(mknod, frame, op_ret, op_errno, inode, stbuf, + preparent, postparent, xdata); } + } else { + DHT_STACK_UNWIND(mknod, frame, op_ret, op_errno, inode, stbuf, + preparent, postparent, xdata); + } - dht_do_readdir (frame, this, fd, size, yoff, op); - return 0; + return 0; } -int -dht_readdirp (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size, - off_t yoff) +static int +dht_mknod_linkfile_create_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, inode_t *inode, + struct iatt *stbuf, struct iatt *preparent, + struct iatt *postparent, dict_t *xdata) { - dht_do_readdir (frame, this, fd, size, yoff, GF_FOP_READDIRP); - return 0; + dht_local_t *local = NULL; + xlator_t *cached_subvol = NULL; + dht_conf_t *conf = NULL; + + local = frame->local; + + if (!local || !local->cached_subvol) { + op_errno = EINVAL; + goto err; + } + + if (op_ret == -1) { + local->op_errno = op_errno; + goto err; + } + + conf = this->private; + if (!conf) { + local->op_errno = EINVAL; + op_errno = EINVAL; + goto err; + } + + cached_subvol = local->cached_subvol; + + if (local->params) { + dict_del(local->params, conf->link_xattr_name); + dict_del(local->params, GLUSTERFS_INTERNAL_FOP_KEY); + } + + STACK_WIND_COOKIE(frame, dht_newfile_cbk, (void *)cached_subvol, + cached_subvol, cached_subvol->fops->mknod, &local->loc, + local->mode, local->rdev, local->umask, local->params); + + return 0; +err: + if (local && local->lock[0].layout.parent_layout.locks) { + local->refresh_layout_unlock(frame, this, -1, 1); + } else { + DHT_STACK_UNWIND(mknod, frame, -1, op_errno, NULL, NULL, NULL, NULL, + NULL); + } + return 0; } +static int +dht_mknod_wind_to_avail_subvol(call_frame_t *frame, xlator_t *this, + xlator_t *subvol, loc_t *loc, dev_t rdev, + mode_t mode, mode_t umask, dict_t *params) +{ + dht_local_t *local = NULL; + xlator_t *avail_subvol = NULL; + local = frame->local; -int -dht_fsyncdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno) + if (!dht_is_subvol_filled(this, subvol)) { + gf_msg_debug(this->name, 0, "creating %s on %s", loc->path, + subvol->name); + + STACK_WIND_COOKIE(frame, dht_newfile_cbk, (void *)subvol, subvol, + subvol->fops->mknod, loc, mode, rdev, umask, params); + } else { + avail_subvol = dht_free_disk_available_subvol(this, subvol, local); + + if (avail_subvol != subvol) { + local->params = dict_ref(params); + local->rdev = rdev; + local->mode = mode; + local->umask = umask; + local->cached_subvol = avail_subvol; + local->hashed_subvol = subvol; + + gf_msg_debug(this->name, 0, "creating %s on %s (link at %s)", + loc->path, avail_subvol->name, subvol->name); + + dht_linkfile_create(frame, dht_mknod_linkfile_create_cbk, this, + avail_subvol, subvol, loc); + + goto out; + } + + gf_msg_debug(this->name, 0, "creating %s on %s", loc->path, + subvol->name); + + STACK_WIND_COOKIE(frame, dht_newfile_cbk, (void *)subvol, subvol, + subvol->fops->mknod, loc, mode, rdev, umask, params); + } +out: + return 0; +} + +static int32_t +dht_mknod_do(call_frame_t *frame) { - dht_local_t *local = NULL; - int this_call_cnt = 0; + dht_local_t *local = NULL; + dht_layout_t *refreshed = NULL; + xlator_t *subvol = NULL; + xlator_t *this = NULL; + dht_conf_t *conf = NULL; + dht_methods_t *methods = NULL; + + local = frame->local; + + this = THIS; + + conf = this->private; + + GF_VALIDATE_OR_GOTO(this->name, conf, err); + methods = &(conf->methods); - local = frame->local; + /* We don't need parent_loc anymore */ + loc_wipe(&local->loc); - LOCK (&frame->lock); - { - if (op_ret == -1) - local->op_errno = op_errno; + loc_copy(&local->loc, &local->loc2); - if (op_ret == 0) - local->op_ret = 0; - } - UNLOCK (&frame->lock); + loc_wipe(&local->loc2); - this_call_cnt = dht_frame_return (frame); - if (is_last_call (this_call_cnt)) - DHT_STACK_UNWIND (fsyncdir, frame, local->op_ret, local->op_errno); + refreshed = local->selfheal.refreshed_layout; + + subvol = methods->layout_search(this, refreshed, local->loc.name); + + if (!subvol) { + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_HASHED_SUBVOL_GET_FAILED, + "no subvolume in " + "layout for path=%s", + local->loc.path); + local->op_errno = ENOENT; + goto err; + } + + dht_mknod_wind_to_avail_subvol(frame, this, subvol, &local->loc, + local->rdev, local->mode, local->umask, + local->params); + return 0; +err: + local->refresh_layout_unlock(frame, this, -1, 1); + + return 0; +} +static int32_t +dht_mknod_unlock_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, dict_t *xdata) +{ + DHT_STACK_DESTROY(frame); + return 0; +} + +static int32_t +dht_mknod_finish(call_frame_t *frame, xlator_t *this, int op_ret, + int invoke_cbk) +{ + dht_local_t *local = NULL, *lock_local = NULL; + call_frame_t *lock_frame = NULL; + int lock_count = 0; + + local = frame->local; + lock_count = dht_lock_count(local->lock[0].layout.parent_layout.locks, + local->lock[0].layout.parent_layout.lk_count); + if (lock_count == 0) + goto done; + + lock_frame = copy_frame(frame); + if (lock_frame == NULL) { + goto done; + } + + lock_local = dht_local_init(lock_frame, &local->loc, NULL, + lock_frame->root->op); + if (lock_local == NULL) { + goto done; + } + + lock_local->lock[0] + .layout.parent_layout.locks = local->lock[0].layout.parent_layout.locks; + lock_local->lock[0].layout.parent_layout.lk_count = + local->lock[0].layout.parent_layout.lk_count; + + local->lock[0].layout.parent_layout.locks = NULL; + local->lock[0].layout.parent_layout.lk_count = 0; + + dht_unlock_inodelk(lock_frame, + lock_local->lock[0].layout.parent_layout.locks, + lock_local->lock[0].layout.parent_layout.lk_count, + dht_mknod_unlock_cbk); + lock_frame = NULL; + +done: + if (lock_frame != NULL) { + DHT_STACK_DESTROY(lock_frame); + } + + if (op_ret == 0) return 0; + + DHT_STACK_UNWIND(mknod, frame, op_ret, local->op_errno, NULL, NULL, NULL, + NULL, NULL); + return 0; } +static int32_t +dht_mknod_lock_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, dict_t *xdata) +{ + dht_local_t *local = NULL; + + local = frame->local; -int -dht_fsyncdir (call_frame_t *frame, xlator_t *this, fd_t *fd, int datasync) + if (!local) { + goto err; + } + + if (op_ret < 0) { + gf_msg("DHT", GF_LOG_ERROR, 0, DHT_MSG_INODE_LK_ERROR, + "mknod lock failed for file: %s", local->loc2.name); + + local->op_errno = op_errno; + + goto err; + } + + local->refresh_layout_unlock = dht_mknod_finish; + + local->refresh_layout_done = dht_mknod_do; + + dht_refresh_layout(frame); + + return 0; +err: + if (local) + dht_mknod_finish(frame, this, -1, 0); + else + DHT_STACK_UNWIND(mknod, frame, -1, EINVAL, NULL, NULL, NULL, NULL, + NULL); + return 0; +} + +static int32_t +dht_mknod_lock(call_frame_t *frame, xlator_t *subvol) { - dht_local_t *local = NULL; - dht_conf_t *conf = NULL; - int op_errno = -1; - int i = -1; + dht_local_t *local = NULL; + int count = 1, ret = -1; + dht_lock_t **lk_array = NULL; + GF_VALIDATE_OR_GOTO("dht", frame, err); + GF_VALIDATE_OR_GOTO(frame->this->name, frame->local, err); - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (fd, err); + local = frame->local; - conf = this->private; + lk_array = GF_CALLOC(count, sizeof(*lk_array), gf_common_mt_pointer); - local = dht_local_init (frame); - if (!local) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } + if (lk_array == NULL) + goto err; - local->fd = fd_ref (fd); - local->call_cnt = conf->subvolume_cnt; + lk_array[0] = dht_lock_new(frame->this, subvol, &local->loc, F_RDLCK, + DHT_LAYOUT_HEAL_DOMAIN, NULL, + IGNORE_ENOENT_ESTALE); - for (i = 0; i < conf->subvolume_cnt; i++) { - STACK_WIND (frame, dht_fsyncdir_cbk, - conf->subvolumes[i], - conf->subvolumes[i]->fops->fsyncdir, - fd, datasync); - } + if (lk_array[0] == NULL) + goto err; - return 0; + local->lock[0].layout.parent_layout.locks = lk_array; + local->lock[0].layout.parent_layout.lk_count = count; + ret = dht_blocking_inodelk(frame, lk_array, count, dht_mknod_lock_cbk); + + if (ret < 0) { + local->lock[0].layout.parent_layout.locks = NULL; + local->lock[0].layout.parent_layout.lk_count = 0; + goto err; + } + + return 0; err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (fsyncdir, frame, -1, op_errno); + if (lk_array != NULL) { + dht_lock_array_free(lk_array, count); + GF_FREE(lk_array); + } - return 0; + return -1; } +static int +dht_refresh_parent_layout_resume(call_frame_t *frame, xlator_t *this, int ret, + int invoke_cbk) +{ + dht_local_t *local = NULL, *parent_local = NULL; + call_stub_t *stub = NULL; + call_frame_t *parent_frame = NULL; -int -dht_newfile_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno, - inode_t *inode, struct stat *stbuf, struct stat *preparent, - struct stat *postparent) + local = frame->local; + + stub = local->stub; + local->stub = NULL; + + parent_frame = stub->frame; + parent_local = parent_frame->local; + + if (ret < 0) { + parent_local->op_ret = -1; + parent_local->op_errno = local->op_errno ? local->op_errno : EIO; + } else { + parent_local->op_ret = 0; + } + + call_resume(stub); + + DHT_STACK_DESTROY(frame); + + return 0; +} + +static int +dht_refresh_parent_layout_done(call_frame_t *frame) { - call_frame_t *prev = NULL; - int ret = -1; - dht_local_t *local = NULL; + dht_local_t *local = NULL; + int ret = 0; + local = frame->local; - if (op_ret == -1) - goto out; + if (local->op_ret < 0) { + ret = -1; + goto resume; + } - local = frame->local; - if (!local) { - op_ret = -1; - op_errno = EINVAL; - goto out; - } + dht_layout_set(frame->this, local->loc.inode, + local->selfheal.refreshed_layout); - prev = cookie; +resume: + dht_refresh_parent_layout_resume(frame, frame->this, ret, 1); + return 0; +} - dht_itransform (this, prev->this, stbuf->st_ino, &stbuf->st_ino); - if (local->loc.parent) { - preparent->st_ino = local->loc.parent->ino; - postparent->st_ino = local->loc.parent->ino; - } - - ret = dht_layout_preset (this, prev->this, inode); - if (ret < 0) { - gf_log (this->name, GF_LOG_DEBUG, - "could not set pre-set layout for subvolume %s", - prev->this->name); - op_ret = -1; - op_errno = EINVAL; - goto out; - } -out: - /* - * FIXME: st_size and st_blocks of preparent and postparent do not have - * correct values. since, preparent and postparent buffers correspond - * to a directory these two members should have values equal to sum of - * corresponding values from each of the subvolume. - * See dht_stat_merge for reference. - */ +static int +dht_handle_parent_layout_change(xlator_t *this, call_stub_t *stub) +{ + call_frame_t *refresh_frame = NULL, *frame = NULL; + dht_local_t *refresh_local = NULL, *local = NULL; + + frame = stub->frame; + local = frame->local; + + refresh_frame = copy_frame(frame); + if (!refresh_frame) { + gf_msg(this->name, GF_LOG_ERROR, ENOMEM, DHT_MSG_NO_MEMORY, + "mem allocation failed for refresh_frame"); + return -1; + } - DHT_STACK_UNWIND (mknod, frame, op_ret, op_errno, inode, stbuf, preparent, - postparent); - return 0; + refresh_local = dht_local_init(refresh_frame, NULL, NULL, stub->fop); + if (!refresh_local) { + gf_msg(this->name, GF_LOG_ERROR, ENOMEM, DHT_MSG_NO_MEMORY, + "mem allocation failed for refresh_local"); + return -1; + } + + refresh_local->loc.inode = inode_ref(local->loc.parent); + gf_uuid_copy(refresh_local->loc.gfid, local->loc.parent->gfid); + + refresh_local->stub = stub; + + refresh_local->refresh_layout_unlock = dht_refresh_parent_layout_resume; + refresh_local->refresh_layout_done = dht_refresh_parent_layout_done; + + dht_refresh_layout(refresh_frame); + return 0; } -int -dht_mknod_linkfile_create_cbk (call_frame_t *frame, void *cookie, - xlator_t *this, - int32_t op_ret, int32_t op_errno, - inode_t *inode, struct stat *stbuf, - struct stat *preparent, struct stat *postparent) +static int32_t +dht_call_mkdir_stub(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, dict_t *xdata) { - dht_local_t *local = NULL; - xlator_t *cached_subvol = NULL; + dht_local_t *local = NULL; + call_stub_t *stub = NULL; - if (op_ret == -1) - goto err; + local = frame->local; + stub = local->stub; + local->stub = NULL; - local = frame->local; - cached_subvol = local->cached_subvol; + if (op_ret < 0) { + local->op_ret = -1; + local->op_errno = op_errno; + } else { + local->op_ret = 0; + } - STACK_WIND (frame, dht_newfile_cbk, - cached_subvol, cached_subvol->fops->mknod, - &local->loc, local->mode, local->rdev); + call_resume(stub); - return 0; - err: - DHT_STACK_UNWIND (mknod, frame, -1, op_errno, NULL, NULL, NULL, NULL); - return 0; + return 0; } -int -dht_mknod (call_frame_t *frame, xlator_t *this, - loc_t *loc, mode_t mode, dev_t rdev) -{ - xlator_t *subvol = NULL; - int op_errno = -1; - int ret = -1; - xlator_t *avail_subvol = NULL; - dht_conf_t *conf = NULL; - dht_local_t *local = NULL; - - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (loc, err); - - conf = this->private; - - dht_get_du_info (frame, this, loc); - - local = dht_local_init (frame); - if (!local) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } - - subvol = dht_subvol_get_hashed (this, loc); - if (!subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no subvolume in layout for path=%s", - loc->path); - op_errno = ENOENT; - goto err; - } - - ret = loc_dup (loc, &local->loc); - if (ret == -1) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; +static int32_t +dht_guard_parent_layout_and_namespace(xlator_t *subvol, call_stub_t *stub) +{ + dht_local_t *local = NULL; + int ret = -1; + loc_t *loc = NULL; + xlator_t *hashed_subvol = NULL, *this = NULL; + ; + call_frame_t *frame = NULL; + char pgfid[GF_UUID_BUF_SIZE] = {0}; + int32_t *parent_disk_layout = NULL; + dht_layout_t *parent_layout = NULL; + dht_conf_t *conf = NULL; + + GF_VALIDATE_OR_GOTO("dht", stub, err); + + frame = stub->frame; + this = frame->this; + + conf = this->private; + + local = frame->local; + + local->stub = stub; + + /* TODO: recheck whether we should lock on src or dst if we do similar + * stale layout checks for rename. + */ + loc = &stub->args.loc; + + gf_uuid_unparse(loc->parent->gfid, pgfid); + + if (local->params == NULL) { + local->params = dict_new(); + if (local->params == NULL) { + local->op_errno = ENOMEM; + gf_msg(this->name, GF_LOG_WARNING, local->op_errno, + DHT_MSG_PARENT_LAYOUT_CHANGED, + "%s (%s/%s) (path: %s): " + "dict allocation failed", + gf_fop_list[stub->fop], pgfid, loc->name, loc->path); + goto err; } + } + + hashed_subvol = dht_subvol_get_hashed(this, loc); + if (hashed_subvol == NULL) { + local->op_errno = EINVAL; + + gf_msg(this->name, GF_LOG_WARNING, local->op_errno, + DHT_MSG_PARENT_LAYOUT_CHANGED, + "%s (%s/%s) (path: %s): " + "hashed subvolume not found", + gf_fop_list[stub->fop], pgfid, loc->name, loc->path); + goto err; + } + + parent_layout = dht_layout_get(this, loc->parent); + + ret = dht_disk_layout_extract_for_subvol(this, parent_layout, hashed_subvol, + &parent_disk_layout); + if (ret == -1) { + local->op_errno = EINVAL; + gf_msg(this->name, GF_LOG_WARNING, local->op_errno, + DHT_MSG_PARENT_LAYOUT_CHANGED, + "%s (%s/%s) (path: %s): " + "extracting in-memory layout of parent failed. ", + gf_fop_list[stub->fop], pgfid, loc->name, loc->path); + goto err; + } + + memcpy((void *)local->parent_disk_layout, (void *)parent_disk_layout, + sizeof(local->parent_disk_layout)); + + dht_layout_unref(this, parent_layout); + parent_layout = NULL; + + ret = dict_set_str(local->params, GF_PREOP_PARENT_KEY, conf->xattr_name); + if (ret < 0) { + local->op_errno = -ret; + gf_msg(this->name, GF_LOG_WARNING, local->op_errno, + DHT_MSG_PARENT_LAYOUT_CHANGED, + "%s (%s/%s) (path: %s): " + "setting %s key in params dictionary failed. ", + gf_fop_list[stub->fop], pgfid, loc->name, loc->path, + GF_PREOP_PARENT_KEY); + goto err; + } + + ret = dict_set_bin(local->params, conf->xattr_name, parent_disk_layout, + 4 * 4); + if (ret < 0) { + local->op_errno = -ret; + gf_msg(this->name, GF_LOG_WARNING, local->op_errno, + DHT_MSG_PARENT_LAYOUT_CHANGED, + "%s (%s/%s) (path: %s): " + "setting parent-layout in params dictionary failed. ", + gf_fop_list[stub->fop], pgfid, loc->name, loc->path); + goto err; + } + + parent_disk_layout = NULL; + local->hashed_subvol = hashed_subvol; + + local->current = &local->lock[0]; + ret = dht_protect_namespace(frame, loc, hashed_subvol, &local->current->ns, + dht_call_mkdir_stub); + if (ret < 0) + goto err; + + return 0; +err: - if (!dht_is_subvol_filled (this, subvol)) { - gf_log (this->name, GF_LOG_TRACE, - "creating %s on %s", loc->path, subvol->name); - - STACK_WIND (frame, dht_newfile_cbk, - subvol, subvol->fops->mknod, - loc, mode, rdev); - } else { - avail_subvol = dht_free_disk_available_subvol (this, subvol); - if (avail_subvol != subvol) { - /* Choose the minimum filled volume, and create the - files there */ - - local->cached_subvol = avail_subvol; - local->mode = mode; - local->rdev = rdev; - - dht_linkfile_create (frame, - dht_mknod_linkfile_create_cbk, - avail_subvol, subvol, loc); - } else { - gf_log (this->name, GF_LOG_TRACE, - "creating %s on %s", loc->path, subvol->name); - - STACK_WIND (frame, dht_newfile_cbk, - subvol, subvol->fops->mknod, - loc, mode, rdev); + if (parent_disk_layout != NULL) + GF_FREE(parent_disk_layout); + + if (parent_layout != NULL) + dht_layout_unref(this, parent_layout); + + return -1; +} + +int +dht_mknod(call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode, + dev_t rdev, mode_t umask, dict_t *params) +{ + xlator_t *subvol = NULL; + int op_errno = -1; + int i = 0; + int ret = 0; + dht_local_t *local = NULL; + dht_conf_t *conf = NULL; + + VALIDATE_OR_GOTO(frame, err); + VALIDATE_OR_GOTO(this, err); + VALIDATE_OR_GOTO(loc, err); + + conf = this->private; + + dht_get_du_info(frame, this, loc); + + local = dht_local_init(frame, loc, NULL, GF_FOP_MKNOD); + if (!local) { + op_errno = ENOMEM; + goto err; + } + + subvol = dht_subvol_get_hashed(this, loc); + if (!subvol) { + gf_msg_debug(this->name, 0, "no subvolume in layout for path=%s", + loc->path); + op_errno = EIO; + goto err; + } + + /* Post remove-brick, the client layout may not be in sync with + * disk layout because of lack of lookup. Hence,a mknod call + * may fall on the decommissioned brick. Hence, if the + * hashed_subvol is part of decommissioned bricks list, do a + * lookup on parent dir. If a fix-layout is already done by the + * remove-brick process, the parent directory layout will be in + * sync with that of the disk. If fix-layout is still ending + * on the parent directory, we can let the file get created on + * the decommissioned brick which will be eventually migrated to + * non-decommissioned brick based on the new layout. + */ + + if (conf->decommission_subvols_cnt) { + for (i = 0; i < conf->subvolume_cnt; i++) { + if (conf->decommissioned_bricks[i] && + conf->decommissioned_bricks[i] == subvol) { + gf_msg_debug(this->name, 0, + "hashed subvol:%s is " + "part of decommission brick list for " + "file: %s", + subvol->name, loc->path); + + /* dht_refresh_layout needs directory info in + * local->loc. Hence, storing the parent_loc in + * local->loc and storing the create context in + * local->loc2. We will restore this information + * in dht_creation do */ + + ret = loc_copy(&local->loc2, &local->loc); + if (ret) { + gf_msg(this->name, GF_LOG_ERROR, ENOMEM, DHT_MSG_NO_MEMORY, + "loc_copy failed %s", loc->path); + + goto err; + } + + local->params = dict_ref(params); + local->rdev = rdev; + local->mode = mode; + local->umask = umask; + + loc_wipe(&local->loc); + + ret = dht_build_parent_loc(this, &local->loc, loc, &op_errno); + + if (ret) { + gf_msg(this->name, GF_LOG_ERROR, ENOMEM, DHT_MSG_LOC_FAILED, + "parent loc build failed"); + goto err; + } + + ret = dht_mknod_lock(frame, subvol); + + if (ret < 0) { + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_INODE_LK_ERROR, + "locking parent failed"); + goto err; } + + goto done; + } } + } + + dht_mknod_wind_to_avail_subvol(frame, this, subvol, loc, rdev, mode, umask, + params); - return 0; +done: + return 0; err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (mknod, frame, -1, op_errno, - NULL, NULL, NULL, NULL); + op_errno = (op_errno == -1) ? errno : op_errno; + DHT_STACK_UNWIND(mknod, frame, -1, op_errno, NULL, NULL, NULL, NULL, NULL); - return 0; + return 0; } +int +dht_symlink(call_frame_t *frame, xlator_t *this, const char *linkname, + loc_t *loc, mode_t umask, dict_t *params) +{ + xlator_t *subvol = NULL; + int op_errno = -1; + dht_local_t *local = NULL; + + VALIDATE_OR_GOTO(frame, err); + VALIDATE_OR_GOTO(this, err); + VALIDATE_OR_GOTO(loc, err); + + local = dht_local_init(frame, loc, NULL, GF_FOP_SYMLINK); + if (!local) { + op_errno = ENOMEM; + goto err; + } + + subvol = dht_subvol_get_hashed(this, loc); + if (!subvol) { + gf_msg_debug(this->name, 0, "no subvolume in layout for path=%s", + loc->path); + op_errno = EIO; + goto err; + } + + gf_msg_trace(this->name, 0, "creating %s on %s", loc->path, subvol->name); + + STACK_WIND_COOKIE(frame, dht_newfile_cbk, (void *)subvol, subvol, + subvol->fops->symlink, linkname, loc, umask, params); + + return 0; + +err: + op_errno = (op_errno == -1) ? errno : op_errno; + DHT_STACK_UNWIND(link, frame, -1, op_errno, NULL, NULL, NULL, NULL, NULL); + + return 0; +} int -dht_symlink (call_frame_t *frame, xlator_t *this, - const char *linkname, loc_t *loc) +dht_unlink(call_frame_t *frame, xlator_t *this, loc_t *loc, int xflag, + dict_t *xdata) { - xlator_t *subvol = NULL; - int op_errno = -1; - dht_local_t *local = NULL; + xlator_t *cached_subvol = NULL; + int op_errno = -1; + dht_local_t *local = NULL; + + VALIDATE_OR_GOTO(frame, err); + VALIDATE_OR_GOTO(this, err); + VALIDATE_OR_GOTO(loc, err); + + local = dht_local_init(frame, loc, NULL, GF_FOP_UNLINK); + if (!local) { + op_errno = ENOMEM; + + goto err; + } + + cached_subvol = local->cached_subvol; + if (!cached_subvol) { + gf_msg_debug(this->name, 0, "no cached subvolume for path=%s", + loc->path); + op_errno = EINVAL; + goto err; + } + + local->flags = xflag; + STACK_WIND_COOKIE(frame, dht_unlink_cbk, cached_subvol, cached_subvol, + cached_subvol->fops->unlink, loc, xflag, xdata); + + return 0; +err: + op_errno = (op_errno == -1) ? errno : op_errno; + DHT_STACK_UNWIND(unlink, frame, -1, op_errno, NULL, NULL, NULL); + return 0; +} - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (loc, err); +static int +dht_remove_stale_linkto_cbk(int ret, call_frame_t *sync_frame, void *data) +{ + DHT_STACK_DESTROY(sync_frame); + return 0; +} - local = dht_local_init (frame); - if (!local) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } +static int +dht_remove_stale_linkto(void *data) +{ + call_frame_t *frame = NULL; + dht_local_t *local = NULL; + xlator_t *this = NULL; + dict_t *xdata_in = NULL; + int ret = 0; + + GF_VALIDATE_OR_GOTO("dht", data, out); + + frame = data; + local = frame->local; + this = frame->this; + GF_VALIDATE_OR_GOTO("dht", this, out); + GF_VALIDATE_OR_GOTO("dht", local, out); + GF_VALIDATE_OR_GOTO("dht", local->link_subvol, out); + + xdata_in = dict_new(); + if (!xdata_in) + goto out; + + ret = dht_fill_dict_to_avoid_unlink_of_migrating_file(xdata_in); + if (ret) { + gf_msg(this->name, GF_LOG_WARNING, -ret, 0, + "Failed to set keys for stale linkto" + "deletion on path %s", + local->loc.path); + goto out; + } + + ret = syncop_unlink(local->link_subvol, &local->loc, xdata_in, NULL); + if (ret) { + gf_msg(this->name, GF_LOG_WARNING, -ret, 0, + "Removal of linkto failed" + " on path %s at subvol %s", + local->loc.path, local->link_subvol->name); + } +out: + if (xdata_in) + dict_unref(xdata_in); + return ret; +} - subvol = dht_subvol_get_hashed (this, loc); - if (!subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no subvolume in layout for path=%s", - loc->path); - op_errno = ENOENT; - goto err; - } +static int +dht_link_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, + int op_errno, inode_t *inode, struct iatt *stbuf, + struct iatt *preparent, struct iatt *postparent, dict_t *xdata) +{ + dht_local_t *local = NULL; + int ret = -1; + gf_boolean_t stbuf_merged = _gf_false; + xlator_t *subvol = NULL; + call_frame_t *cleanup_frame = NULL; + dht_local_t *cleanup_local = NULL; + + local = frame->local; + + if (op_ret == -1) { + /* Remove the linkto if exists */ + if (local->linked) { + cleanup_frame = create_frame(this, this->ctx->pool); + if (cleanup_frame) { + cleanup_local = dht_local_init(cleanup_frame, &local->loc2, + NULL, 0); + if (!cleanup_local || !local->link_subvol) { + DHT_STACK_DESTROY(cleanup_frame); + goto out; + } + cleanup_local->link_subvol = local->link_subvol; + FRAME_SU_DO(cleanup_frame, dht_local_t); + ret = synctask_new(this->ctx->env, dht_remove_stale_linkto, + dht_remove_stale_linkto_cbk, cleanup_frame, + cleanup_frame); + } + } + /* No continuation on DHT inode missing errors, as we should + * then have a good stbuf that states P2 happened. We would + * get inode missing if, the file completed migrated between + * the lookup and the link call */ + goto out; + } + + /* Update parent on success, even if P1/2 checks are positive. + * The second call on success will further update the parent */ + if (local->loc.parent) { + dht_inode_ctx_time_update(local->loc.parent, this, preparent, 0); + dht_inode_ctx_time_update(local->loc.parent, this, postparent, 1); + } + + /* Update linkto attrs, if this is the first call and non-P2, + * if we detect P2 then we need to trust the attrs from the + * second call, not the first */ + if (local->linked == _gf_true && + ((local->call_cnt == 1 && !IS_DHT_MIGRATION_PHASE2(stbuf)) || + (local->call_cnt != 1 && IS_DHT_MIGRATION_PHASE2(&local->stbuf)))) { + dht_iatt_merge(this, &local->stbuf, stbuf); + stbuf_merged = _gf_true; + dht_linkfile_attr_heal(frame, this); + } + + /* No further P1/2 checks if we are in the second iteration of + * the call */ + if (local->call_cnt != 1) { + goto out; + } else { + /* Preserve the return values, in case the migration decides + * to recreate the link on the same subvol that the current + * hased for the link was created on. */ + dht_iatt_merge(this, &local->preparent, preparent); + dht_iatt_merge(this, &local->postparent, postparent); + if (!stbuf_merged) { + dht_iatt_merge(this, &local->stbuf, stbuf); + stbuf_merged = _gf_true; + } + + local->inode = inode_ref(inode); + } + + local->op_ret = op_ret; + local->op_errno = op_errno; + local->rebalance.target_op_fn = dht_link2; + dht_set_local_rebalance(this, local, stbuf, preparent, postparent, xdata); + + /* Check if the rebalance phase2 is true */ + if (IS_DHT_MIGRATION_PHASE2(stbuf)) { + ret = dht_inode_ctx_get_mig_info(this, local->loc.inode, NULL, &subvol); + if (!subvol) { + /* Phase 2 of migration */ + ret = dht_rebalance_complete_check(this, frame); + if (!ret) + return 0; + } else { + dht_link2(this, subvol, frame, 0); + return 0; + } + } + + /* Check if the rebalance phase1 is true */ + if (IS_DHT_MIGRATION_PHASE1(stbuf)) { + ret = dht_inode_ctx_get_mig_info(this, local->loc.inode, NULL, &subvol); + if (subvol) { + dht_link2(this, subvol, frame, 0); + return 0; + } + ret = dht_rebalance_in_progress_check(this, frame); + if (!ret) + return 0; + } +out: + DHT_STRIP_PHASE1_FLAGS(stbuf); + + dht_set_fixed_dir_stat(preparent); + dht_set_fixed_dir_stat(postparent); + DHT_STACK_UNWIND(link, frame, op_ret, op_errno, inode, stbuf, preparent, + postparent, NULL); + + return 0; +} + +static int +dht_link2(xlator_t *this, xlator_t *subvol, call_frame_t *frame, int ret) +{ + dht_local_t *local = NULL; + int op_errno = EINVAL; + + local = frame->local; + if (!local) + goto err; + + op_errno = local->op_errno; + + if (we_are_not_migrating(ret)) { + /* This dht xlator is not migrating the file. Unwind and + * pass on the original mode bits so the higher DHT layer + * can handle this. + */ + dht_set_fixed_dir_stat(&local->preparent); + dht_set_fixed_dir_stat(&local->postparent); + + DHT_STACK_UNWIND(link, frame, local->op_ret, op_errno, local->inode, + &local->stbuf, &local->preparent, &local->postparent, + NULL); + return 0; + } + + if (subvol == NULL) { + op_errno = EINVAL; + goto err; + } + + /* Second call to create link file could result in EEXIST as the + * first call created the linkto in the currently + * migrating subvol, which could be the new hashed subvol */ + if (local->link_subvol == subvol) { + DHT_STRIP_PHASE1_FLAGS(&local->stbuf); + dht_set_fixed_dir_stat(&local->preparent); + dht_set_fixed_dir_stat(&local->postparent); + DHT_STACK_UNWIND(link, frame, 0, 0, local->inode, &local->stbuf, + &local->preparent, &local->postparent, NULL); - gf_log (this->name, GF_LOG_TRACE, - "creating %s on %s", loc->path, subvol->name); + return 0; + } - STACK_WIND (frame, dht_newfile_cbk, - subvol, subvol->fops->symlink, - linkname, loc); + local->call_cnt = 2; - return 0; + STACK_WIND(frame, dht_link_cbk, subvol, subvol->fops->link, &local->loc, + &local->loc2, local->xattr_req); + return 0; err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (link, frame, -1, op_errno, - NULL, NULL, NULL, NULL); + DHT_STACK_UNWIND(link, frame, -1, op_errno, NULL, NULL, NULL, NULL, NULL); - return 0; + return 0; } +static int +dht_link_linkfile_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, inode_t *inode, + struct iatt *stbuf, struct iatt *preparent, + struct iatt *postparent, dict_t *xdata) +{ + dht_local_t *local = NULL; + xlator_t *srcvol = NULL; + + if (op_ret == -1) + goto err; -int -dht_unlink (call_frame_t *frame, xlator_t *this, loc_t *loc) -{ - xlator_t *cached_subvol = NULL; - xlator_t *hashed_subvol = NULL; - int ret = -1; - int op_errno = -1; - dht_local_t *local = NULL; - - - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (loc, err); - - cached_subvol = dht_subvol_get_cached (this, loc->inode); - if (!cached_subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no cached subvolume for path=%s", loc->path); - op_errno = EINVAL; - goto err; - } - - hashed_subvol = dht_subvol_get_hashed (this, loc); - if (!hashed_subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no subvolume in layout for path=%s", - loc->path); - op_errno = EINVAL; - goto err; - } - - local = dht_local_init (frame); - if (!local) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } - - ret = loc_copy (&local->loc, loc); - if (ret == -1) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } - - local->call_cnt = 1; - if (hashed_subvol != cached_subvol) - local->call_cnt++; - - STACK_WIND (frame, dht_unlink_cbk, - cached_subvol, cached_subvol->fops->unlink, loc); - - if (hashed_subvol != cached_subvol) - STACK_WIND (frame, dht_unlink_cbk, - hashed_subvol, hashed_subvol->fops->unlink, loc); - - return 0; + local = frame->local; + srcvol = local->linkfile.srcvol; + + STACK_WIND(frame, dht_link_cbk, srcvol, srcvol->fops->link, &local->loc, + &local->loc2, local->xattr_req); + + return 0; err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (link, frame, -1, op_errno, NULL, NULL, NULL, NULL); + DHT_STRIP_PHASE1_FLAGS(stbuf); + dht_set_fixed_dir_stat(preparent); + dht_set_fixed_dir_stat(postparent); + DHT_STACK_UNWIND(link, frame, op_ret, op_errno, inode, stbuf, preparent, + postparent, xdata); - return 0; + return 0; } +int +dht_link(call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc, + dict_t *xdata) +{ + xlator_t *cached_subvol = NULL; + xlator_t *hashed_subvol = NULL; + int op_errno = -1; + int ret = -1; + dht_local_t *local = NULL; + + VALIDATE_OR_GOTO(frame, err); + VALIDATE_OR_GOTO(this, err); + VALIDATE_OR_GOTO(oldloc, err); + VALIDATE_OR_GOTO(newloc, err); + + local = dht_local_init(frame, oldloc, NULL, GF_FOP_LINK); + if (!local) { + op_errno = ENOMEM; + + goto err; + } + local->call_cnt = 1; + + cached_subvol = local->cached_subvol; + if (!cached_subvol) { + gf_msg_debug(this->name, 0, "no cached subvolume for path=%s", + oldloc->path); + op_errno = ENOENT; + goto err; + } + + hashed_subvol = dht_subvol_get_hashed(this, newloc); + if (!hashed_subvol) { + gf_msg_debug(this->name, 0, "no subvolume in layout for path=%s", + newloc->path); + op_errno = EIO; + goto err; + } + + ret = loc_copy(&local->loc2, newloc); + if (ret == -1) { + op_errno = ENOMEM; + goto err; + } + if (xdata) + local->xattr_req = dict_ref(xdata); + + if (hashed_subvol != cached_subvol) { + gf_uuid_copy(local->gfid, oldloc->inode->gfid); + dht_linkfile_create(frame, dht_link_linkfile_cbk, this, cached_subvol, + hashed_subvol, newloc); + } else { + STACK_WIND(frame, dht_link_cbk, cached_subvol, + cached_subvol->fops->link, oldloc, newloc, xdata); + } + + return 0; + +err: + op_errno = (op_errno == -1) ? errno : op_errno; + DHT_STACK_UNWIND(link, frame, -1, op_errno, NULL, NULL, NULL, NULL, NULL); + + return 0; +} int -dht_link_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno, - inode_t *inode, struct stat *stbuf, struct stat *preparent, - struct stat *postparent) +dht_create_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, + int op_errno, fd_t *fd, inode_t *inode, struct iatt *stbuf, + struct iatt *preparent, struct iatt *postparent, dict_t *xdata) { - call_frame_t *prev = NULL; - dht_layout_t *layout = NULL; - dht_local_t *local = NULL; + xlator_t *prev = NULL; + int ret = -1; + dht_local_t *local = NULL; + gf_boolean_t parent_layout_changed = _gf_false; + char pgfid[GF_UUID_BUF_SIZE] = {0}; + xlator_t *subvol = NULL; + + local = frame->local; + + local = frame->local; + if (!local) { + op_ret = -1; + op_errno = EINVAL; + goto out; + } + + if (op_ret == -1) { + local->op_errno = op_errno; + parent_layout_changed = (xdata && + dict_get(xdata, GF_PREOP_CHECK_FAILED)) + ? _gf_true + : _gf_false; + + if (parent_layout_changed) { + if (local && local->lock[0].layout.parent_layout.locks) { + /* Returning failure as the layout could not be fixed even under + * the lock */ + goto out; + } - prev = cookie; - local = frame->local; + gf_uuid_unparse(local->loc.parent->gfid, pgfid); + gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_PARENT_LAYOUT_CHANGED, + "create (%s/%s) (path: %s): parent layout " + "changed. Attempting a layout refresh and then a " + "retry", + pgfid, local->loc.name, local->loc.path); - if (op_ret == -1) + /* + dht_refresh_layout needs directory info in local->loc.Hence, + storing the parent_loc in local->loc and storing the create + context in local->loc2. We will restore this information in + dht_creation_do. + */ + + loc_wipe(&local->loc2); + + ret = loc_copy(&local->loc2, &local->loc); + if (ret) { + gf_msg(this->name, GF_LOG_ERROR, ENOMEM, DHT_MSG_NO_MEMORY, + "loc_copy failed %s", local->loc.path); + + goto out; + } + + loc_wipe(&local->loc); + + ret = dht_build_parent_loc(this, &local->loc, &local->loc2, + &op_errno); + + if (ret) { + gf_msg(this->name, GF_LOG_ERROR, ENOMEM, DHT_MSG_LOC_FAILED, + "parent loc build failed"); + goto out; + } + + subvol = dht_subvol_get_hashed(this, &local->loc2); + + ret = dht_create_lock(frame, subvol); + if (ret < 0) { + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_INODE_LK_ERROR, + "locking parent failed"); goto out; + } + + return 0; + } + + goto out; + } + + prev = cookie; - layout = dht_layout_for_subvol (this, prev->this); - if (!layout) { - gf_log (this->name, GF_LOG_DEBUG, - "no pre-set layout for subvolume %s", - prev->this->name); - op_ret = -1; - op_errno = EINVAL; - goto out; - } + if (local->loc.parent) { + dht_inode_ctx_time_update(local->loc.parent, this, preparent, 0); - stbuf->st_ino = local->loc.inode->ino; + dht_inode_ctx_time_update(local->loc.parent, this, postparent, 1); + } - preparent->st_ino = local->loc2.parent->ino; - postparent->st_ino = local->loc2.parent->ino; + ret = dht_fd_ctx_set(this, fd, prev); + if (ret != 0) { + gf_msg_debug(this->name, 0, + "Possible fd leak. " + "Could not set fd ctx for subvol %s", + prev->name); + } + ret = dht_layout_preset(this, prev, inode); + if (ret != 0) { + gf_msg_debug(this->name, 0, "could not set preset layout for subvol %s", + prev->name); + op_ret = -1; + op_errno = EINVAL; + goto out; + } + + local->op_errno = op_errno; + + if (local->linked == _gf_true) { + local->stbuf = *stbuf; + dht_linkfile_attr_heal(frame, this); + } out: - DHT_STACK_UNWIND (link, frame, op_ret, op_errno, inode, stbuf, preparent, - postparent); - return 0; + DHT_STRIP_PHASE1_FLAGS(stbuf); + dht_set_fixed_dir_stat(preparent); + dht_set_fixed_dir_stat(postparent); + + if (local && local->lock[0].layout.parent_layout.locks) { + /* store op_errno for failure case*/ + local->op_errno = op_errno; + local->refresh_layout_unlock(frame, this, op_ret, 1); + + if (op_ret == 0) { + DHT_STACK_UNWIND(create, frame, op_ret, op_errno, fd, inode, stbuf, + preparent, postparent, xdata); + } + } else { + DHT_STACK_UNWIND(create, frame, op_ret, op_errno, fd, inode, stbuf, + preparent, postparent, xdata); + } + return 0; } +static int +dht_create_linkfile_create_cbk(call_frame_t *frame, void *cookie, + xlator_t *this, int32_t op_ret, int32_t op_errno, + inode_t *inode, struct iatt *stbuf, + struct iatt *preparent, struct iatt *postparent, + dict_t *xdata) +{ + dht_local_t *local = NULL; + xlator_t *cached_subvol = NULL; + dht_conf_t *conf = NULL; + + local = frame->local; + if (!local) { + op_errno = EINVAL; + goto err; + } + + if (op_ret == -1) { + local->op_errno = op_errno; + goto err; + } + + conf = this->private; + if (!conf) { + local->op_errno = EINVAL; + op_errno = EINVAL; + goto err; + } + + cached_subvol = local->cached_subvol; + + if (local->params) { + dict_del(local->params, conf->link_xattr_name); + dict_del(local->params, GLUSTERFS_INTERNAL_FOP_KEY); + } + + STACK_WIND_COOKIE(frame, dht_create_cbk, cached_subvol, cached_subvol, + cached_subvol->fops->create, &local->loc, local->flags, + local->mode, local->umask, local->fd, local->params); + + return 0; +err: + if (local && local->lock[0].layout.parent_layout.locks) { + local->refresh_layout_unlock(frame, this, -1, 1); + } else { + DHT_STACK_UNWIND(create, frame, -1, op_errno, NULL, NULL, NULL, NULL, + NULL, NULL); + } + return 0; +} -int -dht_link_linkfile_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno, - inode_t *inode, struct stat *stbuf, - struct stat *preparent, struct stat *postparent) +static int +dht_create_wind_to_avail_subvol(call_frame_t *frame, xlator_t *this, + xlator_t *subvol, loc_t *loc, int32_t flags, + mode_t mode, mode_t umask, fd_t *fd, + dict_t *params) { - dht_local_t *local = NULL; - xlator_t *srcvol = NULL; + dht_local_t *local = NULL; + xlator_t *avail_subvol = NULL; + local = frame->local; - if (op_ret == -1) - goto err; + if (!dht_is_subvol_filled(this, subvol)) { + gf_msg_debug(this->name, 0, "creating %s on %s", loc->path, + subvol->name); - local = frame->local; - srcvol = local->linkfile.srcvol; + dht_set_parent_layout_in_dict(loc, this, local); - STACK_WIND (frame, dht_link_cbk, - srcvol, srcvol->fops->link, - &local->loc, &local->loc2); + STACK_WIND_COOKIE(frame, dht_create_cbk, subvol, subvol, + subvol->fops->create, loc, flags, mode, umask, fd, + params); - return 0; + } else { + avail_subvol = dht_free_disk_available_subvol(this, subvol, local); -err: - DHT_STACK_UNWIND (link, frame, op_ret, op_errno, inode, stbuf, preparent, - postparent); + if (avail_subvol != subvol) { + local->cached_subvol = avail_subvol; + local->hashed_subvol = subvol; - return 0; -} + gf_msg_debug(this->name, 0, "creating %s on %s (link at %s)", + loc->path, avail_subvol->name, subvol->name); + dht_linkfile_create(frame, dht_create_linkfile_create_cbk, this, + avail_subvol, subvol, loc); -int -dht_link (call_frame_t *frame, xlator_t *this, - loc_t *oldloc, loc_t *newloc) -{ - xlator_t *cached_subvol = NULL; - xlator_t *hashed_subvol = NULL; - int op_errno = -1; - int ret = -1; - dht_local_t *local = NULL; - - - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (oldloc, err); - VALIDATE_OR_GOTO (newloc, err); - - cached_subvol = dht_subvol_get_cached (this, oldloc->inode); - if (!cached_subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no cached subvolume for path=%s", oldloc->path); - op_errno = EINVAL; - goto err; - } - - hashed_subvol = dht_subvol_get_hashed (this, newloc); - if (!hashed_subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no subvolume in layout for path=%s", - newloc->path); - op_errno = EINVAL; - goto err; - } - - local = dht_local_init (frame); - if (!local) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } - - ret = loc_copy (&local->loc, oldloc); - if (ret == -1) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } - - ret = loc_copy (&local->loc2, newloc); - if (ret == -1) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } - - if (hashed_subvol != cached_subvol) { - dht_linkfile_create (frame, dht_link_linkfile_cbk, - cached_subvol, hashed_subvol, newloc); - } else { - STACK_WIND (frame, dht_link_cbk, - cached_subvol, cached_subvol->fops->link, - oldloc, newloc); - } - - return 0; + goto out; + } -err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (link, frame, -1, op_errno, NULL, NULL, NULL, NULL); + gf_msg_debug(this->name, 0, "creating %s on %s", loc->path, + subvol->name); - return 0; -} + dht_set_parent_layout_in_dict(loc, this, local); + STACK_WIND_COOKIE(frame, dht_create_cbk, subvol, subvol, + subvol->fops->create, loc, flags, mode, umask, fd, + params); + } +out: + return 0; +} int -dht_create_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno, - fd_t *fd, inode_t *inode, struct stat *stbuf, - struct stat *preparent, struct stat *postparent) +dht_build_parent_loc(xlator_t *this, loc_t *parent, loc_t *child, + int32_t *op_errno) { - call_frame_t *prev = NULL; - int ret = -1; - dht_local_t *local = NULL; + inode_table_t *table = NULL; + int ret = -1; + + if (!parent || !child) { + if (op_errno) + *op_errno = EINVAL; + goto out; + } + + if (child->parent) { + parent->inode = inode_ref(child->parent); + if (!parent->inode) { + if (op_errno) + *op_errno = EINVAL; + goto out; + } - if (op_ret == -1) - goto out; + gf_uuid_copy(parent->gfid, child->pargfid); - local = frame->local; - if (!local) { - op_ret = -1; - op_errno = EINVAL; + ret = 0; + + goto out; + } else { + if (gf_uuid_is_null(child->pargfid)) { + if (op_errno) + *op_errno = EINVAL; + goto out; + } + + table = this->itable; + + if (!table) { + if (op_errno) { + *op_errno = EINVAL; goto out; + } } - prev = cookie; + parent->inode = inode_find(table, child->pargfid); - dht_itransform (this, prev->this, stbuf->st_ino, &stbuf->st_ino); - if (local->loc.parent) { - preparent->st_ino = local->loc.parent->ino; - postparent->st_ino = local->loc.parent->ino; + if (!parent->inode) { + if (op_errno) { + *op_errno = EINVAL; + goto out; + } } - ret = dht_layout_preset (this, prev->this, inode); - if (ret != 0) { - gf_log (this->name, GF_LOG_DEBUG, - "could not set preset layout for subvol %s", - prev->this->name); - op_ret = -1; - op_errno = EINVAL; - goto out; - } + gf_uuid_copy(parent->gfid, child->pargfid); + + ret = 0; + } out: - DHT_STACK_UNWIND (create, frame, op_ret, op_errno, fd, inode, stbuf, preparent, - postparent); - return 0; + return ret; } - -int -dht_create_linkfile_create_cbk (call_frame_t *frame, void *cookie, - xlator_t *this, - int32_t op_ret, int32_t op_errno, - inode_t *inode, struct stat *stbuf, - struct stat *preparent, struct stat *postparent) +static int32_t +dht_create_do(call_frame_t *frame) { - dht_local_t *local = NULL; - xlator_t *cached_subvol = NULL; + dht_local_t *local = NULL; + dht_layout_t *refreshed = NULL; + xlator_t *subvol = NULL; + xlator_t *this = NULL; + dht_conf_t *conf = NULL; + dht_methods_t *methods = NULL; - if (op_ret == -1) - goto err; + local = frame->local; - local = frame->local; - cached_subvol = local->cached_subvol; + this = THIS; - STACK_WIND (frame, dht_create_cbk, - cached_subvol, cached_subvol->fops->create, - &local->loc, local->flags, local->mode, local->fd); + conf = this->private; - return 0; - err: - DHT_STACK_UNWIND (create, frame, -1, op_errno, NULL, NULL, NULL, NULL, NULL); - return 0; -} + GF_VALIDATE_OR_GOTO(this->name, conf, err); -int -dht_create (call_frame_t *frame, xlator_t *this, - loc_t *loc, int32_t flags, mode_t mode, fd_t *fd) -{ - int op_errno = -1; - int ret = -1; - xlator_t *subvol = NULL; - dht_conf_t *conf = NULL; - dht_local_t *local = NULL; - xlator_t *avail_subvol = NULL; - - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (loc, err); - - conf = this->private; - - dht_get_du_info (frame, this, loc); - - local = dht_local_init (frame); - if (!local) { - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - op_errno = ENOMEM; - goto err; - } - - subvol = dht_subvol_get_hashed (this, loc); - if (!subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no subvolume in layout for path=%s", - loc->path); - op_errno = ENOENT; - goto err; - } - - ret = loc_dup (loc, &local->loc); - if (ret == -1) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } + methods = &(conf->methods); - if (!dht_is_subvol_filled (this, subvol)) { - gf_log (this->name, GF_LOG_TRACE, - "creating %s on %s", loc->path, subvol->name); - STACK_WIND (frame, dht_create_cbk, - subvol, subvol->fops->create, - loc, flags, mode, fd); - } else { - /* Choose the minimum filled volume, and create the - files there */ - /* TODO */ - avail_subvol = dht_free_disk_available_subvol (this, subvol); - if (avail_subvol != subvol) { - local->fd = fd_ref (fd); - local->flags = flags; - local->mode = mode; - - local->cached_subvol = avail_subvol; - local->hashed_subvol = subvol; - gf_log (this->name, GF_LOG_TRACE, - "creating %s on %s (link at %s)", loc->path, - avail_subvol->name, subvol->name); - dht_linkfile_create (frame, - dht_create_linkfile_create_cbk, - avail_subvol, subvol, loc); - } else { - gf_log (this->name, GF_LOG_TRACE, - "creating %s on %s", loc->path, subvol->name); - STACK_WIND (frame, dht_create_cbk, - subvol, subvol->fops->create, - loc, flags, mode, fd); - - } - } + /* We don't need parent_loc anymore */ + loc_wipe(&local->loc); + + loc_copy(&local->loc, &local->loc2); + + loc_wipe(&local->loc2); - return 0; + refreshed = local->selfheal.refreshed_layout; + subvol = methods->layout_search(this, refreshed, local->loc.name); + + if (!subvol) { + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_HASHED_SUBVOL_GET_FAILED, + "no subvolume in " + "layout for path=%s", + local->loc.path); + local->op_errno = ENOENT; + goto err; + } + + dht_create_wind_to_avail_subvol(frame, this, subvol, &local->loc, + local->flags, local->mode, local->umask, + local->fd, local->params); + return 0; err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (create, frame, -1, op_errno, NULL, NULL, NULL, NULL, NULL); + local->refresh_layout_unlock(frame, this, -1, 1); - return 0; + return 0; } +static int32_t +dht_create_unlock_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, dict_t *xdata) +{ + DHT_STACK_DESTROY(frame); + return 0; +} -int -dht_mkdir_selfheal_cbk (call_frame_t *frame, void *cookie, - xlator_t *this, - int32_t op_ret, int32_t op_errno) +static int32_t +dht_create_finish(call_frame_t *frame, xlator_t *this, int op_ret, + int invoke_cbk) { - dht_local_t *local = NULL; - dht_layout_t *layout = NULL; + dht_local_t *local = NULL, *lock_local = NULL; + call_frame_t *lock_frame = NULL; + int lock_count = 0; + + local = frame->local; + lock_count = dht_lock_count(local->lock[0].layout.parent_layout.locks, + local->lock[0].layout.parent_layout.lk_count); + if (lock_count == 0) + goto done; + + lock_frame = copy_frame(frame); + if (lock_frame == NULL) { + goto done; + } + + lock_local = dht_local_init(lock_frame, &local->loc, NULL, + lock_frame->root->op); + if (lock_local == NULL) { + goto done; + } + + lock_local->lock[0] + .layout.parent_layout.locks = local->lock[0].layout.parent_layout.locks; + lock_local->lock[0].layout.parent_layout.lk_count = + local->lock[0].layout.parent_layout.lk_count; + + local->lock[0].layout.parent_layout.locks = NULL; + local->lock[0].layout.parent_layout.lk_count = 0; + + dht_unlock_inodelk(lock_frame, + lock_local->lock[0].layout.parent_layout.locks, + lock_local->lock[0].layout.parent_layout.lk_count, + dht_create_unlock_cbk); + lock_frame = NULL; + +done: + if (lock_frame != NULL) { + DHT_STACK_DESTROY(lock_frame); + } + + if (op_ret == 0) + return 0; + DHT_STACK_UNWIND(create, frame, op_ret, local->op_errno, NULL, NULL, NULL, + NULL, NULL, NULL); + return 0; +} - local = frame->local; - layout = local->selfheal.layout; +static int32_t +dht_create_lock_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, dict_t *xdata) +{ + dht_local_t *local = NULL; - if (op_ret == 0) { - dht_layout_set (this, local->inode, layout); - local->stbuf.st_ino = local->st_ino; - local->stbuf.st_dev = local->st_dev; - if (local->loc.parent) { - local->preparent.st_ino = local->loc.parent->ino; - local->postparent.st_ino = local->loc.parent->ino; - } - } + local = frame->local; - DHT_STACK_UNWIND (mkdir, frame, op_ret, op_errno, - local->inode, &local->stbuf, &local->preparent, - &local->postparent); + if (!local) { + goto err; + } - return 0; + if (op_ret < 0) { + gf_msg("DHT", GF_LOG_ERROR, 0, DHT_MSG_INODE_LK_ERROR, + "Create lock failed for file: %s", local->loc2.name); + + local->op_errno = op_errno; + + goto err; + } + + local->refresh_layout_unlock = dht_create_finish; + + local->refresh_layout_done = dht_create_do; + + dht_refresh_layout(frame); + + return 0; +err: + if (local) + dht_create_finish(frame, this, -1, 0); + else + DHT_STACK_UNWIND(create, frame, -1, EINVAL, NULL, NULL, NULL, NULL, + NULL, NULL); + return 0; } -int -dht_mkdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno, inode_t *inode, struct stat *stbuf, - struct stat *preparent, struct stat *postparent) -{ - dht_local_t *local = NULL; - int this_call_cnt = 0; - int ret = -1; - int subvol_filled = 0; - call_frame_t *prev = NULL; - dht_layout_t *layout = NULL; - dht_conf_t *conf = NULL; - - conf = this->private; - local = frame->local; - prev = cookie; - layout = local->layout; - - subvol_filled = dht_is_subvol_filled (this, prev->this); - - LOCK (&frame->lock); - { - if (subvol_filled && (op_ret != -1)) { - ret = dht_layout_merge (this, layout, prev->this, - -1, ENOSPC, NULL); - } else { - ret = dht_layout_merge (this, layout, prev->this, - op_ret, op_errno, NULL); - } +int32_t +dht_create_lock(call_frame_t *frame, xlator_t *subvol) +{ + dht_local_t *local = NULL; + int count = 1, ret = -1; + dht_lock_t **lk_array = NULL; - if (op_ret == -1) { - local->op_errno = op_errno; - goto unlock; - } - dht_stat_merge (this, &local->stbuf, stbuf, prev->this); - dht_stat_merge (this, &local->preparent, preparent, prev->this); - dht_stat_merge (this, &local->postparent, postparent, - prev->this); - } -unlock: - UNLOCK (&frame->lock); + GF_VALIDATE_OR_GOTO("dht", frame, err); + GF_VALIDATE_OR_GOTO(frame->this->name, frame->local, err); - this_call_cnt = dht_frame_return (frame); - if (is_last_call (this_call_cnt)) { - dht_selfheal_new_directory (frame, dht_mkdir_selfheal_cbk, - layout); - } + local = frame->local; - return 0; + lk_array = GF_CALLOC(count, sizeof(*lk_array), gf_common_mt_pointer); + + if (lk_array == NULL) + goto err; + + lk_array[0] = dht_lock_new(frame->this, subvol, &local->loc, F_RDLCK, + DHT_LAYOUT_HEAL_DOMAIN, NULL, + IGNORE_ENOENT_ESTALE); + + if (lk_array[0] == NULL) + goto err; + + local->lock[0].layout.parent_layout.locks = lk_array; + local->lock[0].layout.parent_layout.lk_count = count; + + ret = dht_blocking_inodelk(frame, lk_array, count, dht_create_lock_cbk); + + if (ret < 0) { + local->lock[0].layout.parent_layout.locks = NULL; + local->lock[0].layout.parent_layout.lk_count = 0; + goto err; + } + + return 0; +err: + if (lk_array != NULL) { + dht_lock_array_free(lk_array, count); + GF_FREE(lk_array); + } + + return -1; } int -dht_mkdir_hashed_cbk (call_frame_t *frame, void *cookie, - xlator_t *this, int op_ret, int op_errno, - inode_t *inode, struct stat *stbuf, - struct stat *preparent, struct stat *postparent) -{ - dht_local_t *local = NULL; - int ret = -1; - call_frame_t *prev = NULL; - dht_layout_t *layout = NULL; - dht_conf_t *conf = NULL; - int i = 0; - xlator_t *hashed_subvol = NULL; - - local = frame->local; - prev = cookie; - layout = local->layout; - conf = this->private; - hashed_subvol = local->hashed_subvol; - - if (dht_is_subvol_filled (this, hashed_subvol)) - ret = dht_layout_merge (this, layout, prev->this, - -1, ENOSPC, NULL); - else - ret = dht_layout_merge (this, layout, prev->this, - op_ret, op_errno, NULL); - - if (op_ret == -1) { - local->op_errno = op_errno; - goto err; - } - local->op_ret = 0; - - dht_stat_merge (this, &local->stbuf, stbuf, prev->this); - dht_stat_merge (this, &local->preparent, preparent, prev->this); - dht_stat_merge (this, &local->postparent, postparent, prev->this); - - local->st_ino = local->stbuf.st_ino; - local->st_dev = local->stbuf.st_dev; - - local->call_cnt = conf->subvolume_cnt - 1; - - if (local->call_cnt == 0) { - dht_selfheal_directory (frame, dht_mkdir_selfheal_cbk, - &local->loc, layout); - } - for (i = 0; i < conf->subvolume_cnt; i++) { - if (conf->subvolumes[i] == hashed_subvol) - continue; - STACK_WIND (frame, dht_mkdir_cbk, - conf->subvolumes[i], - conf->subvolumes[i]->fops->mkdir, - &local->loc, local->mode); - } - return 0; +dht_set_parent_layout_in_dict(loc_t *loc, xlator_t *this, dht_local_t *local) +{ + dht_conf_t *conf = this->private; + dht_layout_t *parent_layout = NULL; + int *parent_disk_layout = NULL; + xlator_t *hashed_subvol = NULL; + char pgfid[GF_UUID_BUF_SIZE] = {0}; + int ret = 0; + + gf_uuid_unparse(loc->parent->gfid, pgfid); + + parent_layout = dht_layout_get(this, loc->parent); + hashed_subvol = dht_subvol_get_hashed(this, loc); + + ret = dht_disk_layout_extract_for_subvol(this, parent_layout, hashed_subvol, + &parent_disk_layout); + if (ret == -1) { + gf_msg(this->name, GF_LOG_WARNING, local->op_errno, + DHT_MSG_PARENT_LAYOUT_CHANGED, + "%s (%s/%s) (path: %s): " + "extracting in-memory layout of parent failed. ", + gf_fop_list[local->fop], pgfid, loc->name, loc->path); + goto err; + } + + ret = dict_set_str_sizen(local->params, GF_PREOP_PARENT_KEY, + conf->xattr_name); + if (ret < 0) { + gf_msg(this->name, GF_LOG_WARNING, local->op_errno, + DHT_MSG_PARENT_LAYOUT_CHANGED, + "%s (%s/%s) (path: %s): " + "setting %s key in params dictionary failed. ", + gf_fop_list[local->fop], pgfid, loc->name, loc->path, + GF_PREOP_PARENT_KEY); + goto err; + } + + ret = dict_set_bin(local->params, conf->xattr_name, parent_disk_layout, + 4 * 4); + if (ret < 0) { + gf_msg(this->name, GF_LOG_WARNING, local->op_errno, + DHT_MSG_PARENT_LAYOUT_CHANGED, + "%s (%s/%s) (path: %s): " + "setting parent-layout in params dictionary failed. ", + gf_fop_list[local->fop], pgfid, loc->name, loc->path); + goto err; + } + err: - DHT_STACK_UNWIND (mkdir, frame, -1, op_errno, NULL, NULL, NULL, NULL); - return 0; + dht_layout_unref(this, parent_layout); + return ret; } int -dht_mkdir (call_frame_t *frame, xlator_t *this, - loc_t *loc, mode_t mode) -{ - dht_local_t *local = NULL; - dht_conf_t *conf = NULL; - int op_errno = -1; - int ret = -1; - xlator_t *hashed_subvol = NULL; - - - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (loc, err); - VALIDATE_OR_GOTO (loc->inode, err); - VALIDATE_OR_GOTO (loc->path, err); - - conf = this->private; - - dht_get_du_info (frame, this, loc); - - local = dht_local_init (frame); - if (!local) { - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - op_errno = ENOMEM; - goto err; - } - - hashed_subvol = dht_subvol_get_hashed (this, loc); - - if (hashed_subvol == NULL) { - gf_log (this->name, GF_LOG_DEBUG, - "hashed subvol not found for %s", - loc->path); - op_errno = EINVAL; - goto err; - } - - local->hashed_subvol = hashed_subvol; - local->inode = inode_ref (loc->inode); - ret = loc_copy (&local->loc, loc); - local->mode = mode; - - if (ret == -1) { - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - op_errno = ENOMEM; - goto err; - } - - local->layout = dht_layout_new (this, conf->subvolume_cnt); - if (!local->layout) { - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - op_errno = ENOMEM; - goto err; - } - - STACK_WIND (frame, dht_mkdir_hashed_cbk, - hashed_subvol, - hashed_subvol->fops->mkdir, - loc, mode); - - return 0; +dht_create(call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags, + mode_t mode, mode_t umask, fd_t *fd, dict_t *params) +{ + int op_errno = -1; + xlator_t *subvol = NULL; + xlator_t *hashed_subvol = NULL; + dht_local_t *local = NULL; + int i = 0; + dht_conf_t *conf = NULL; + int ret = 0; + + VALIDATE_OR_GOTO(frame, err); + VALIDATE_OR_GOTO(this, err); + VALIDATE_OR_GOTO(loc, err); + + conf = this->private; + + dht_get_du_info(frame, this, loc); + + local = dht_local_init(frame, loc, fd, GF_FOP_CREATE); + if (!local) { + op_errno = ENOMEM; + goto err; + } + + local->params = dict_ref(params); + local->flags = flags; + local->mode = mode; + local->umask = umask; + + if (dht_filter_loc_subvol_key(this, loc, &local->loc, &subvol)) { + gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_SUBVOL_INFO, + "creating %s on %s (got create on %s)", local->loc.path, + subvol->name, loc->path); + + /* Since lookup-optimize is enabled by default, we need + * to create the linkto file if required. + * Note this does not check for decommisioned bricks + * and min-free-disk limits as this is a debugging tool + * and not expected to be used in production. + */ + hashed_subvol = dht_subvol_get_hashed(this, &local->loc); + + if (hashed_subvol && (hashed_subvol != subvol)) { + /* Create the linkto file and then the data file */ + local->cached_subvol = subvol; + local->hashed_subvol = hashed_subvol; + + dht_linkfile_create(frame, dht_create_linkfile_create_cbk, this, + subvol, hashed_subvol, &local->loc); + goto done; + } + /* We either don't have a hashed subvol or the hashed subvol is + * the same as the one specified. No need to create the linkto + * file as we expect a lookup everywhere if there are problems + * with the parent layout + */ + + dht_set_parent_layout_in_dict(loc, this, local); + + STACK_WIND_COOKIE(frame, dht_create_cbk, subvol, subvol, + subvol->fops->create, &local->loc, flags, mode, umask, + fd, params); + goto done; + } + + subvol = dht_subvol_get_hashed(this, loc); + if (!subvol) { + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_HASHED_SUBVOL_GET_FAILED, + "no subvolume in layout for path=%s", loc->path); + + op_errno = EIO; + goto err; + } + + /* Post remove-brick, the client layout may not be in sync with + * disk layout because of lack of lookup. Hence,a create call + * may fall on the decommissioned brick. Hence, if the + * hashed_subvol is part of decommissioned bricks list, do a + * lookup on parent dir. If a fix-layout is already done by the + * remove-brick process, the parent directory layout will be in + * sync with that of the disk. If fix-layout is still ending + * on the parent directory, we can let the file get created on + * the decommissioned brick which will be eventually migrated to + * non-decommissioned brick based on the new layout. + */ + + if (conf->decommission_subvols_cnt) { + for (i = 0; i < conf->subvolume_cnt; i++) { + if (conf->decommissioned_bricks[i] && + conf->decommissioned_bricks[i] == subvol) { + gf_msg_debug(this->name, 0, + "hashed subvol:%s is " + "part of decommission brick list for " + "file: %s", + subvol->name, loc->path); + + /* dht_refresh_layout needs directory info in + * local->loc. Hence, storing the parent_loc in + * local->loc and storing the create context in + * local->loc2. We will restore this information + * in dht_creation do */ + + ret = loc_copy(&local->loc2, &local->loc); + if (ret) { + gf_msg(this->name, GF_LOG_ERROR, ENOMEM, DHT_MSG_NO_MEMORY, + "loc_copy failed %s", loc->path); + + goto err; + } + + loc_wipe(&local->loc); + + ret = dht_build_parent_loc(this, &local->loc, loc, &op_errno); + + if (ret) { + gf_msg(this->name, GF_LOG_ERROR, ENOMEM, DHT_MSG_LOC_FAILED, + "parent loc build failed"); + goto err; + } + + ret = dht_create_lock(frame, subvol); + + if (ret < 0) { + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_INODE_LK_ERROR, + "locking parent failed"); + goto err; + } + + goto done; + } + } + } + + dht_create_wind_to_avail_subvol(frame, this, subvol, loc, flags, mode, + umask, fd, params); +done: + return 0; err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (mkdir, frame, -1, op_errno, NULL, NULL, NULL, NULL); - return 0; -} + op_errno = (op_errno == -1) ? errno : op_errno; + DHT_STACK_UNWIND(create, frame, -1, op_errno, NULL, NULL, NULL, NULL, NULL, + NULL); + return 0; +} -int -dht_rmdir_selfheal_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno) +static int +dht_mkdir_selfheal_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, dict_t *xdata) { - dht_local_t *local = NULL; + dht_local_t *local = NULL; + dht_layout_t *layout = NULL; - local = frame->local; + local = frame->local; + layout = local->selfheal.layout; + FRAME_SU_UNDO(frame, dht_local_t); + dht_set_fixed_dir_stat(&local->preparent); + dht_set_fixed_dir_stat(&local->postparent); + + if (op_ret == 0) { + dht_layout_set(this, local->inode, layout); + + dht_inode_ctx_time_update(local->inode, this, &local->stbuf, 1); if (local->loc.parent) { - local->preparent.st_ino = local->loc.parent->ino; - local->postparent.st_ino = local->loc.parent->ino; + dht_inode_ctx_time_update(local->loc.parent, this, + &local->preparent, 0); + + dht_inode_ctx_time_update(local->loc.parent, this, + &local->postparent, 1); } + } - DHT_STACK_UNWIND (rmdir, frame, local->op_ret, local->op_errno, - &local->preparent, &local->postparent); + DHT_STACK_UNWIND(mkdir, frame, op_ret, op_errno, local->inode, + &local->stbuf, &local->preparent, &local->postparent, + NULL); - return 0; + return 0; } +static int +dht_mkdir_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, + int op_errno, inode_t *inode, struct iatt *stbuf, + struct iatt *preparent, struct iatt *postparent, dict_t *xdata) +{ + dht_local_t *local = NULL; + int this_call_cnt = 0; + int ret = -1; + gf_boolean_t subvol_filled = _gf_false; + gf_boolean_t dir_exists = _gf_false; + xlator_t *prev = NULL; + dht_layout_t *layout = NULL; + + local = frame->local; + prev = cookie; + layout = local->layout; + + subvol_filled = dht_is_subvol_filled(this, prev); + + LOCK(&frame->lock); + { + if (subvol_filled && (op_ret != -1)) { + ret = dht_layout_merge(this, layout, prev, -1, ENOSPC, NULL); + } else { + if (op_ret == -1 && op_errno == EEXIST) { + /* Very likely just a race between mkdir and + self-heal (from lookup of a concurrent mkdir + attempt). + Ignore error for now. layout setting will + anyways fail if this was a different (old) + pre-existing different directory. + */ + op_ret = 0; + dir_exists = _gf_true; + } + ret = dht_layout_merge(this, layout, prev, op_ret, op_errno, NULL); + } + if (ret) + gf_msg(this->name, GF_LOG_WARNING, 0, DHT_MSG_LAYOUT_MERGE_FAILED, + "%s: failed to merge layouts for subvol %s", local->loc.path, + prev->name); -int -dht_rmdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno, struct stat *preparent, - struct stat *postparent) -{ - dht_local_t *local = NULL; - int this_call_cnt = 0; - call_frame_t *prev = NULL; - - local = frame->local; - prev = cookie; - - LOCK (&frame->lock); - { - if (op_ret == -1) { - local->op_errno = op_errno; - local->op_ret = -1; - - if (op_errno != ENOENT) - local->need_selfheal = 1; - - gf_log (this->name, GF_LOG_DEBUG, - "rmdir on %s for %s failed (%s)", - prev->this->name, local->loc.path, - strerror (op_errno)); - goto unlock; - } - - dht_stat_merge (this, &local->preparent, preparent, prev->this); - dht_stat_merge (this, &local->postparent, postparent, - prev->this); - } + if (op_ret == -1) { + local->op_errno = op_errno; + goto unlock; + } + + if (dir_exists) + goto unlock; + + dht_iatt_merge(this, &local->stbuf, stbuf); + dht_iatt_merge(this, &local->preparent, preparent); + dht_iatt_merge(this, &local->postparent, postparent); + } unlock: - UNLOCK (&frame->lock); - - - this_call_cnt = dht_frame_return (frame); - if (is_last_call (this_call_cnt)) { - if (local->need_selfheal) { - local->layout = - dht_layout_get (this, local->loc.inode); - - /* TODO: neater interface needed below */ - local->stbuf.st_mode = local->loc.inode->st_mode; - - dht_selfheal_restore (frame, dht_rmdir_selfheal_cbk, - &local->loc, local->layout); - } else { - if (local->loc.parent) { - local->preparent.st_ino = - local->loc.parent->ino; - local->postparent.st_ino = - local->loc.parent->ino; - } + UNLOCK(&frame->lock); - DHT_STACK_UNWIND (rmdir, frame, local->op_ret, - local->op_errno, &local->preparent, - &local->postparent); - } - } + this_call_cnt = dht_frame_return(frame); + if (is_last_call(this_call_cnt)) { + /*Unlock entrylk and inodelk once mkdir is done on all subvols*/ + dht_unlock_namespace(frame, &local->lock[0]); + FRAME_SU_DO(frame, dht_local_t); + dht_selfheal_new_directory(frame, dht_mkdir_selfheal_cbk, layout); + } - return 0; + return 0; } +static int +dht_mkdir_hashed_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, inode_t *inode, + struct iatt *stbuf, struct iatt *preparent, + struct iatt *postparent, dict_t *xdata); -int -dht_rmdir_do (call_frame_t *frame, xlator_t *this) +static int +dht_mkdir_helper(call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode, + mode_t umask, dict_t *params) { - dht_local_t *local = NULL; - dht_conf_t *conf = NULL; - int i = 0; + dht_local_t *local = NULL; + dht_conf_t *conf = NULL; + int op_errno = -1, ret = -1; + xlator_t *hashed_subvol = NULL; + int32_t *parent_disk_layout = NULL; + dht_layout_t *parent_layout = NULL; + char pgfid[GF_UUID_BUF_SIZE] = {0}; + + VALIDATE_OR_GOTO(frame, err); + VALIDATE_OR_GOTO(this, err); + VALIDATE_OR_GOTO(loc, err); + VALIDATE_OR_GOTO(loc->inode, err); + VALIDATE_OR_GOTO(loc->path, err); + VALIDATE_OR_GOTO(this->private, err); + + gf_uuid_unparse(loc->parent->gfid, pgfid); + + conf = this->private; + local = frame->local; + + if (local->op_ret == -1) { + gf_msg(this->name, GF_LOG_WARNING, local->op_errno, + DHT_MSG_PARENT_LAYOUT_CHANGED, + "mkdir (%s/%s) (path: %s): refreshing parent layout " + "failed.", + pgfid, loc->name, loc->path); + + op_errno = local->op_errno; + goto err; + } + + local->op_ret = -1; + + hashed_subvol = dht_subvol_get_hashed(this, loc); + if (hashed_subvol == NULL) { + gf_msg_debug(this->name, 0, + "mkdir (%s/%s) (path: %s): hashed subvol not " + "found", + pgfid, loc->name, loc->path); + op_errno = ENOENT; + goto err; + } + + local->hashed_subvol = hashed_subvol; + + parent_layout = dht_layout_get(this, loc->parent); + + ret = dht_disk_layout_extract_for_subvol(this, parent_layout, hashed_subvol, + &parent_disk_layout); + if (ret == -1) { + gf_msg(this->name, GF_LOG_WARNING, EIO, DHT_MSG_PARENT_LAYOUT_CHANGED, + "mkdir (%s/%s) (path: %s): " + "extracting in-memory layout of parent failed. ", + pgfid, loc->name, loc->path); + goto err; + } + + if (memcmp(local->parent_disk_layout, parent_disk_layout, + sizeof(local->parent_disk_layout)) == 0) { + gf_msg(this->name, GF_LOG_WARNING, EIO, DHT_MSG_PARENT_LAYOUT_CHANGED, + "mkdir (%s/%s) (path: %s): loop detected. " + "parent layout didn't change even though " + "previous attempt of mkdir failed because of " + "in-memory layout not matching with that on disk.", + pgfid, loc->name, loc->path); + op_errno = EIO; + goto err; + } + + memcpy((void *)local->parent_disk_layout, (void *)parent_disk_layout, + sizeof(local->parent_disk_layout)); + + dht_layout_unref(this, parent_layout); + parent_layout = NULL; + + ret = dict_set_str(params, GF_PREOP_PARENT_KEY, conf->xattr_name); + if (ret < 0) { + local->op_errno = -ret; + gf_msg(this->name, GF_LOG_WARNING, local->op_errno, + DHT_MSG_PARENT_LAYOUT_CHANGED, + "mkdir (%s/%s) (path: %s): " + "setting %s key in params dictionary failed. ", + pgfid, loc->name, loc->path, GF_PREOP_PARENT_KEY); + goto err; + } + + ret = dict_set_bin(params, conf->xattr_name, parent_disk_layout, 4 * 4); + if (ret < 0) { + local->op_errno = -ret; + gf_msg(this->name, GF_LOG_WARNING, local->op_errno, + DHT_MSG_PARENT_LAYOUT_CHANGED, + "setting parent-layout in params dictionary failed. " + "mkdir (%s/%s) (path: %s)", + pgfid, loc->name, loc->path); + goto err; + } + + parent_disk_layout = NULL; + + STACK_WIND_COOKIE(frame, dht_mkdir_hashed_cbk, hashed_subvol, hashed_subvol, + hashed_subvol->fops->mkdir, loc, mode, umask, params); + + return 0; - conf = this->private; - local = frame->local; +err: + dht_unlock_namespace(frame, &local->lock[0]); + + op_errno = local ? local->op_errno : op_errno; + DHT_STACK_UNWIND(mkdir, frame, -1, op_errno, NULL, NULL, NULL, NULL, NULL); + + if (parent_disk_layout != NULL) + GF_FREE(parent_disk_layout); + + if (parent_layout != NULL) + dht_layout_unref(this, parent_layout); + + return 0; +} - if (local->op_ret == -1) - goto err; +static int +dht_mkdir_hashed_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, inode_t *inode, + struct iatt *stbuf, struct iatt *preparent, + struct iatt *postparent, dict_t *xdata) +{ + dht_local_t *local = NULL; + int ret = -1; + xlator_t *prev = NULL; + dht_layout_t *layout = NULL; + dht_conf_t *conf = NULL; + int i = 0; + xlator_t *hashed_subvol = NULL; + char pgfid[GF_UUID_BUF_SIZE] = {0}; + gf_boolean_t parent_layout_changed = _gf_false; + call_stub_t *stub = NULL; + + local = frame->local; + prev = cookie; + layout = local->layout; + conf = this->private; + hashed_subvol = local->hashed_subvol; + + gf_uuid_unparse(local->loc.parent->gfid, pgfid); + + if (gf_uuid_is_null(local->loc.gfid) && !op_ret) + gf_uuid_copy(local->loc.gfid, stbuf->ia_gfid); + + if (op_ret == -1) { + local->op_errno = op_errno; + + parent_layout_changed = (xdata && + dict_get(xdata, GF_PREOP_CHECK_FAILED)) + ? 1 + : 0; + if (parent_layout_changed) { + gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_PARENT_LAYOUT_CHANGED, + "mkdir (%s/%s) (path: %s): parent layout " + "changed. Attempting a refresh and then a " + "retry", + pgfid, local->loc.name, local->loc.path); + + stub = fop_mkdir_stub(frame, dht_mkdir_helper, &local->loc, + local->mode, local->umask, local->params); + if (stub == NULL) { + goto err; + } - local->call_cnt = conf->subvolume_cnt; + ret = dht_handle_parent_layout_change(this, stub); + if (ret) { + goto err; + } - for (i = 0; i < conf->subvolume_cnt; i++) { - STACK_WIND (frame, dht_rmdir_cbk, - conf->subvolumes[i], - conf->subvolumes[i]->fops->rmdir, - &local->loc); - } + stub = NULL; - return 0; + return 0; + } + goto err; + } + + dict_del(local->params, GF_PREOP_PARENT_KEY); + dict_del(local->params, conf->xattr_name); + + if (dht_is_subvol_filled(this, hashed_subvol)) + ret = dht_layout_merge(this, layout, prev, -1, ENOSPC, NULL); + else + ret = dht_layout_merge(this, layout, prev, op_ret, op_errno, NULL); + + /* TODO: we may have to return from the function + if layout merge fails. For now, lets just log an error */ + if (ret) + gf_msg(this->name, GF_LOG_WARNING, 0, DHT_MSG_LAYOUT_MERGE_FAILED, + "%s: failed to merge layouts for subvol %s", local->loc.path, + prev->name); + + local->op_ret = 0; + + dht_iatt_merge(this, &local->stbuf, stbuf); + dht_iatt_merge(this, &local->preparent, preparent); + dht_iatt_merge(this, &local->postparent, postparent); + + local->call_cnt = conf->subvolume_cnt - 1; + /* Delete internal mds xattr from params dict to avoid store + internal mds xattr on other subvols + */ + dict_del(local->params, conf->mds_xattr_key); + + if (gf_uuid_is_null(local->loc.gfid)) + gf_uuid_copy(local->loc.gfid, stbuf->ia_gfid); + + /* Set hashed subvol as a mds subvol on inode ctx */ + /*if (!local->inode) + local->inode = inode_ref (inode); + */ + ret = dht_inode_ctx_mdsvol_set(local->inode, this, hashed_subvol); + if (ret) { + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_SET_INODE_CTX_FAILED, + "Failed to set hashed subvol for %s on inode vol is %s", + local->loc.path, hashed_subvol->name); + } + + if (local->call_cnt == 0) { + /*Unlock namespace lock once mkdir is done on all subvols*/ + dht_unlock_namespace(frame, &local->lock[0]); + FRAME_SU_DO(frame, dht_local_t); + dht_selfheal_directory(frame, dht_mkdir_selfheal_cbk, &local->loc, + layout); + return 0; + } + + for (i = 0; i < conf->subvolume_cnt; i++) { + if (conf->subvolumes[i] == hashed_subvol) + continue; + STACK_WIND_COOKIE(frame, dht_mkdir_cbk, conf->subvolumes[i], + conf->subvolumes[i], conf->subvolumes[i]->fops->mkdir, + &local->loc, local->mode, local->umask, + local->params); + } + + return 0; err: - DHT_STACK_UNWIND (rmdir, frame, local->op_ret, local->op_errno, - &local->preparent, &local->postparent); - return 0; + if (local->op_ret != 0) { + dht_unlock_namespace(frame, &local->lock[0]); + } + + DHT_STACK_UNWIND(mkdir, frame, -1, op_errno, NULL, NULL, NULL, NULL, NULL); + + return 0; } +static int +dht_mkdir_guard_parent_layout_cbk(call_frame_t *frame, xlator_t *this, + loc_t *loc, mode_t mode, mode_t umask, + dict_t *params) +{ + dht_local_t *local = NULL; + dht_conf_t *conf = 0; + char pgfid[GF_UUID_BUF_SIZE] = {0}; + int ret = -1; + int32_t zero[1] = {0}; + + local = frame->local; + conf = this->private; + + gf_uuid_unparse(loc->parent->gfid, pgfid); + + if (local->op_ret < 0) { + gf_msg(this->name, GF_LOG_WARNING, local->op_errno, + DHT_MSG_PARENT_LAYOUT_CHANGED, + "mkdir (%s/%s) (path: %s): " + "Acquiring lock on parent to guard against " + "layout-change failed.", + pgfid, loc->name, loc->path); + goto err; + } + + local->op_ret = -1; + /* Add internal MDS xattr on disk for hashed subvol + */ + ret = dht_dict_set_array(params, conf->mds_xattr_key, zero, 1); + if (ret) { + gf_msg(this->name, GF_LOG_WARNING, ENOMEM, DHT_MSG_DICT_SET_FAILED, + "Failed to set dictionary value:key = %s for " + "path %s", + conf->mds_xattr_key, loc->path); + } + + STACK_WIND_COOKIE(frame, dht_mkdir_hashed_cbk, local->hashed_subvol, + local->hashed_subvol, local->hashed_subvol->fops->mkdir, + loc, mode, umask, params); + + return 0; +err: + DHT_STACK_UNWIND(mkdir, frame, -1, local->op_errno, NULL, NULL, NULL, NULL, + NULL); + + return 0; +} int -dht_rmdir_linkfile_unlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno, struct stat *preparent, - struct stat *postparent) +dht_mkdir(call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode, + mode_t umask, dict_t *params) { - dht_local_t *local = NULL; - call_frame_t *prev = NULL; - xlator_t *src = NULL; - call_frame_t *main_frame = NULL; - dht_local_t *main_local = NULL; - int this_call_cnt = 0; + dht_local_t *local = NULL; + dht_conf_t *conf = NULL; + int op_errno = EINVAL, ret = -1; + xlator_t *hashed_subvol = NULL; + char pgfid[GF_UUID_BUF_SIZE] = {0}; + call_stub_t *stub = NULL; + + VALIDATE_OR_GOTO(frame, err); + VALIDATE_OR_GOTO(this, err); + VALIDATE_OR_GOTO(loc, err); + VALIDATE_OR_GOTO(loc->inode, err); + VALIDATE_OR_GOTO(loc->path, err); + VALIDATE_OR_GOTO(this->private, err); + + gf_uuid_unparse(loc->parent->gfid, pgfid); + + conf = this->private; + + if (!params || !dict_get(params, "gfid-req")) { + op_errno = EPERM; + gf_msg_callingfn(this->name, GF_LOG_WARNING, op_errno, + DHT_MSG_GFID_NULL, + "mkdir: %s is received " + "without gfid-req %p", + loc->path, params); + goto err; + } + + dht_get_du_info(frame, this, loc); + + local = dht_local_init(frame, loc, NULL, GF_FOP_MKDIR); + if (!local) { + op_errno = ENOMEM; + goto err; + } + + hashed_subvol = dht_subvol_get_hashed(this, loc); + if (hashed_subvol == NULL) { + gf_msg_debug(this->name, 0, "hashed subvol not found for %s", + loc->path); + local->op_errno = EIO; + goto err; + } + + local->hashed_subvol = hashed_subvol; + local->mode = mode; + local->umask = umask; + if (params) + local->params = dict_ref(params); + + local->inode = inode_ref(loc->inode); + + local->layout = dht_layout_new(this, conf->subvolume_cnt); + if (!local->layout) { + op_errno = ENOMEM; + goto err; + } + + /* set the newly created directory hash to the commit hash + * if the configuration option is set. If configuration option + * is not set, the older clients may still be connecting to the + * volume and hence we need to preserve the 1 in disk[0] part of the + * layout xattr */ + if (conf->lookup_optimize) + local->layout->commit_hash = conf->vol_commit_hash; + else + local->layout->commit_hash = DHT_LAYOUT_HASH_INVALID; + + stub = fop_mkdir_stub(frame, dht_mkdir_guard_parent_layout_cbk, loc, mode, + umask, params); + if (stub == NULL) { + gf_msg(this->name, GF_LOG_WARNING, ENOMEM, + DHT_MSG_PARENT_LAYOUT_CHANGED, + "mkdir (%s/%s) (path: %s): " + "creating stub failed.", + pgfid, loc->name, loc->path); + local->op_errno = ENOMEM; + goto err; + } + + ret = dht_guard_parent_layout_and_namespace(this, stub); + if (ret < 0) { + gf_msg(this->name, GF_LOG_WARNING, 0, DHT_MSG_PARENT_LAYOUT_CHANGED, + "mkdir (%s/%s) (path: %s) cannot wind lock request to " + "guard parent layout", + pgfid, loc->name, loc->path); + goto err; + } + + return 0; - local = frame->local; - prev = cookie; - src = prev->this; +err: + op_errno = local ? local->op_errno : op_errno; + DHT_STACK_UNWIND(mkdir, frame, -1, op_errno, NULL, NULL, NULL, NULL, NULL); - main_frame = local->main_frame; - main_local = main_frame->local; + return 0; +} - if (op_ret == 0) { - gf_log (this->name, GF_LOG_TRACE, - "unlinked linkfile %s on %s", - local->loc.path, src->name); - } else { - main_local->op_ret = -1; - main_local->op_errno = op_errno; - gf_log (this->name, GF_LOG_DEBUG, - "unlink of %s on %s failed (%s)", - local->loc.path, src->name, strerror (op_errno)); - } +static int +dht_rmdir_selfheal_cbk(call_frame_t *heal_frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, dict_t *xdata) +{ + dht_local_t *local = NULL; + dht_local_t *heal_local = NULL; + call_frame_t *main_frame = NULL; - this_call_cnt = dht_frame_return (main_frame); - if (is_last_call (this_call_cnt)) - dht_rmdir_do (main_frame, this); + heal_local = heal_frame->local; + main_frame = heal_local->main_frame; + local = main_frame->local; - DHT_STACK_DESTROY (frame); - return 0; -} + DHT_STACK_DESTROY(heal_frame); + dht_set_fixed_dir_stat(&local->preparent); + dht_set_fixed_dir_stat(&local->postparent); + DHT_STACK_UNWIND(rmdir, main_frame, local->op_ret, local->op_errno, + &local->preparent, &local->postparent, NULL); -int -dht_rmdir_lookup_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno, inode_t *inode, - struct stat *stbuf, dict_t *xattr, struct stat *parent) + return 0; +} + +static int +dht_rmdir_hashed_subvol_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, struct iatt *preparent, + struct iatt *postparent, dict_t *xdata) { - dht_local_t *local = NULL; - call_frame_t *prev = NULL; - xlator_t *src = NULL; - call_frame_t *main_frame = NULL; - dht_local_t *main_local = NULL; - int this_call_cnt = 0; + dht_local_t *local = NULL; + dht_local_t *heal_local = NULL; + call_frame_t *heal_frame = NULL; + dht_conf_t *conf = NULL; + int this_call_cnt = 0; + xlator_t *prev = NULL; + char gfid[GF_UUID_BUF_SIZE] = {0}; + + local = frame->local; + prev = cookie; + conf = this->private; + + gf_uuid_unparse(local->loc.gfid, gfid); + + LOCK(&frame->lock); + { + if (op_ret == -1) { + local->op_errno = op_errno; + local->op_ret = -1; + if (conf->subvolume_cnt != 1) { + if (op_errno != ENOENT && op_errno != EACCES && + op_errno != ESTALE) { + local->need_selfheal = 1; + } + } - local = frame->local; - prev = cookie; - src = prev->this; + gf_msg_debug(this->name, op_errno, + "rmdir on %s for %s failed " + "(gfid = %s)", + prev->name, local->loc.path, gfid); + goto unlock; + } - main_frame = local->main_frame; - main_local = main_frame->local; + dht_iatt_merge(this, &local->preparent, preparent); + dht_iatt_merge(this, &local->postparent, postparent); + } +unlock: + UNLOCK(&frame->lock); - if (op_ret != 0) - goto err; + this_call_cnt = dht_frame_return(frame); + if (is_last_call(this_call_cnt)) { + if (local->need_selfheal) { + dht_rmdir_unlock(frame, this); + local->layout = dht_layout_get(this, local->loc.inode); - if (check_is_linkfile (inode, stbuf, xattr) == 0) { - main_local->op_ret = -1; - main_local->op_errno = ENOTEMPTY; + /* TODO: neater interface needed below */ + local->stbuf.ia_type = local->loc.inode->ia_type; - gf_log (this->name, GF_LOG_WARNING, - "%s on %s found to be not a linkfile (mode=0%o)", - local->loc.path, src->name, stbuf->st_mode); + gf_uuid_copy(local->gfid, local->loc.inode->gfid); + + /* Use a different frame or else the rmdir op_ret is + * overwritten by that of the selfheal */ + + heal_frame = copy_frame(frame); + + if (heal_frame == NULL) { goto err; + } + + heal_local = dht_local_init(heal_frame, &local->loc, NULL, 0); + if (!heal_local) { + DHT_STACK_DESTROY(heal_frame); + goto err; + } + + heal_local->inode = inode_ref(local->loc.inode); + heal_local->main_frame = frame; + gf_uuid_copy(heal_local->gfid, local->loc.inode->gfid); + + dht_selfheal_restore(heal_frame, dht_rmdir_selfheal_cbk, + &heal_local->loc, heal_local->layout); + return 0; + } else { + if (local->loc.parent) { + dht_inode_ctx_time_update(local->loc.parent, this, + &local->preparent, 0); + + dht_inode_ctx_time_update(local->loc.parent, this, + &local->postparent, 1); + } + + dht_set_fixed_dir_stat(&local->preparent); + dht_set_fixed_dir_stat(&local->postparent); + + dht_rmdir_unlock(frame, this); + DHT_STACK_UNWIND(rmdir, frame, local->op_ret, local->op_errno, + &local->preparent, &local->postparent, NULL); } + } - STACK_WIND (frame, dht_rmdir_linkfile_unlink_cbk, - src, src->fops->unlink, &local->loc); - return 0; -err: + return 0; - this_call_cnt = dht_frame_return (main_frame); - if (is_last_call (this_call_cnt)) - dht_rmdir_do (main_frame, this); +err: + DHT_STACK_UNWIND(rmdir, frame, local->op_ret, local->op_errno, NULL, NULL, + NULL); + return 0; +} - DHT_STACK_DESTROY (frame); - return 0; +static int +dht_rmdir_unlock_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, dict_t *xdata) +{ + DHT_STACK_DESTROY(frame); + return 0; } +static int +dht_rmdir_unlock(call_frame_t *frame, xlator_t *this) +{ + dht_local_t *local = NULL, *lock_local = NULL; + call_frame_t *lock_frame = NULL; + int lock_count = 0; + + local = frame->local; -int -dht_rmdir_is_subvol_empty (call_frame_t *frame, xlator_t *this, - gf_dirent_t *entries, xlator_t *src) + /* Unlock entrylk */ + dht_unlock_entrylk_wrapper(frame, &local->lock[0].ns.directory_ns); + + /* Unlock inodelk */ + lock_count = dht_lock_count(local->lock[0].ns.parent_layout.locks, + local->lock[0].ns.parent_layout.lk_count); + + if (lock_count == 0) + goto done; + + lock_frame = copy_frame(frame); + if (lock_frame == NULL) + goto done; + + lock_local = dht_local_init(lock_frame, &local->loc, NULL, + lock_frame->root->op); + if (lock_local == NULL) + goto done; + + lock_local->lock[0].ns.parent_layout.locks = local->lock[0] + .ns.parent_layout.locks; + lock_local->lock[0] + .ns.parent_layout.lk_count = local->lock[0].ns.parent_layout.lk_count; + + local->lock[0].ns.parent_layout.locks = NULL; + local->lock[0].ns.parent_layout.lk_count = 0; + dht_unlock_inodelk(lock_frame, lock_local->lock[0].ns.parent_layout.locks, + lock_local->lock[0].ns.parent_layout.lk_count, + dht_rmdir_unlock_cbk); + lock_frame = NULL; + +done: + if (lock_frame != NULL) { + DHT_STACK_DESTROY(lock_frame); + } + + return 0; +} + +static int +dht_rmdir_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, + int op_errno, struct iatt *preparent, struct iatt *postparent, + dict_t *xdata) { - int ret = 0; - int build_ret = 0; - gf_dirent_t *trav = NULL; - call_frame_t *lookup_frame = NULL; - dht_local_t *lookup_local = NULL; - dht_local_t *local = NULL; + dht_local_t *local = NULL; + int this_call_cnt = 0; + xlator_t *prev = NULL; + int done = 0; + char gfid[GF_UUID_BUF_SIZE] = {0}; + dht_local_t *heal_local = NULL; + call_frame_t *heal_frame = NULL; + int ret = -1; + + local = frame->local; + prev = cookie; + + LOCK(&frame->lock); + { + if (op_ret == -1) { + if ((op_errno != ENOENT) && (op_errno != ESTALE)) { + local->op_errno = op_errno; + local->op_ret = -1; - local = frame->local; + if (op_errno != EACCES) + local->need_selfheal = 1; + } - list_for_each_entry (trav, &entries->list, list) { - if (strcmp (trav->d_name, ".") == 0) - continue; - if (strcmp (trav->d_name, "..") == 0) - continue; - if (check_is_linkfile (NULL, (&trav->d_stat), NULL) == 1) { - ret++; - continue; - } + gf_uuid_unparse(local->loc.gfid, gfid); - /* this entry is either a directory which is neither "." nor "..", - or a non directory which is not a linkfile. the directory is to - be treated as non-empty - */ - return 0; + gf_msg_debug(this->name, op_errno, + "rmdir on %s for %s failed." + "(gfid = %s)", + prev->name, local->loc.path, gfid); + goto unlock; } - list_for_each_entry (trav, &entries->list, list) { - if (strcmp (trav->d_name, ".") == 0) - continue; - if (strcmp (trav->d_name, "..") == 0) - continue; + /* Track if rmdir succeeded on at least one subvol*/ + local->fop_succeeded = 1; + dht_iatt_merge(this, &local->preparent, preparent); + dht_iatt_merge(this, &local->postparent, postparent); + } +unlock: + UNLOCK(&frame->lock); - lookup_frame = NULL; - lookup_local = NULL; + this_call_cnt = dht_frame_return(frame); - lookup_frame = copy_frame (frame); - if (!lookup_frame) { - gf_log (this->name, GF_LOG_ERROR, - "Out of Memory"); - /* out of memory, let the rmdir fail - (as non-empty, unfortunately) */ - goto err; - } + /* if local->hashed_subvol, we are yet to wind to hashed_subvol. */ + if (local->hashed_subvol && (this_call_cnt == 1)) { + done = 1; + } else if (!local->hashed_subvol && !this_call_cnt) { + done = 1; + } - lookup_local = CALLOC (sizeof (*local), 1); - if (!lookup_local) { - gf_log (this->name, GF_LOG_ERROR, - "Out of Memory"); - goto err; - } + if (done) { + if (local->need_selfheal && local->fop_succeeded) { + dht_rmdir_unlock(frame, this); + local->layout = dht_layout_get(this, local->loc.inode); + + /* TODO: neater interface needed below */ + local->stbuf.ia_type = local->loc.inode->ia_type; + + gf_uuid_copy(local->gfid, local->loc.inode->gfid); + heal_frame = copy_frame(frame); + if (heal_frame == NULL) { + goto err; + } + + heal_local = dht_local_init(heal_frame, &local->loc, NULL, 0); + if (!heal_local) { + DHT_STACK_DESTROY(heal_frame); + goto err; + } + + heal_local->inode = inode_ref(local->loc.inode); + heal_local->main_frame = frame; + gf_uuid_copy(heal_local->gfid, local->loc.inode->gfid); + ret = dht_selfheal_restore(heal_frame, dht_rmdir_selfheal_cbk, + &heal_local->loc, heal_local->layout); + if (ret) { + DHT_STACK_DESTROY(heal_frame); + goto err; + } + + } else if (this_call_cnt) { + /* If non-hashed subvol's have responded, proceed */ + if (local->op_ret == 0) { + /* Delete the dir from the hashed subvol if: + * The fop succeeded on at least one subvol + * and did not fail on any + * or + * The fop failed with ENOENT/ESTALE on + * all subvols */ + + STACK_WIND_COOKIE(frame, dht_rmdir_hashed_subvol_cbk, + local->hashed_subvol, local->hashed_subvol, + local->hashed_subvol->fops->rmdir, + &local->loc, local->flags, NULL); + } else { + /* hashed-subvol was non-NULL and rmdir failed on + * all non hashed-subvols. Unwind rmdir with + * local->op_ret and local->op_errno. */ + dht_rmdir_unlock(frame, this); + DHT_STACK_UNWIND(rmdir, frame, local->op_ret, local->op_errno, + &local->preparent, &local->postparent, NULL); - lookup_frame->local = lookup_local; - lookup_local->main_frame = frame; + return 0; + } + } else if (!this_call_cnt) { + /* All subvol's have responded, proceed */ - build_ret = dht_build_child_loc (this, &lookup_local->loc, - &local->loc, trav->d_name); - if (build_ret != 0) - goto err; + if (local->loc.parent) { + dht_inode_ctx_time_update(local->loc.parent, this, + &local->preparent, 0); - gf_log (this->name, GF_LOG_TRACE, - "looking up %s on %s", - lookup_local->loc.path, src->name); + dht_inode_ctx_time_update(local->loc.parent, this, + &local->postparent, 1); + } - LOCK (&frame->lock); - { - local->call_cnt++; - } - UNLOCK (&frame->lock); + dht_set_fixed_dir_stat(&local->preparent); + dht_set_fixed_dir_stat(&local->postparent); - STACK_WIND (lookup_frame, dht_rmdir_lookup_cbk, - src, src->fops->lookup, - &lookup_local->loc, NULL); - ret++; + dht_rmdir_unlock(frame, this); + DHT_STACK_UNWIND(rmdir, frame, local->op_ret, local->op_errno, + &local->preparent, &local->postparent, NULL); } + } + + return 0; - return ret; err: - DHT_STACK_DESTROY (lookup_frame); - return 0; + DHT_STACK_UNWIND(rmdir, frame, -1, local->op_errno, NULL, NULL, NULL); + return 0; } +static int +dht_rmdir_lock_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, dict_t *xdata) +{ + dht_local_t *local = NULL; + dht_conf_t *conf = NULL; + int i = 0; + xlator_t *hashed_subvol; -int -dht_rmdir_readdirp_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno, gf_dirent_t *entries) -{ - dht_local_t *local = NULL; - int this_call_cnt = -1; - call_frame_t *prev = NULL; - xlator_t *src = NULL; - int ret = 0; - - local = frame->local; - prev = cookie; - src = prev->this; - - if (op_ret > 2) { - ret = dht_rmdir_is_subvol_empty (frame, this, entries, src); - - switch (ret) { - case 0: /* non linkfiles exist */ - gf_log (this->name, GF_LOG_TRACE, - "readdir on %s for %s returned %d entries", - prev->this->name, local->loc.path, op_ret); - local->op_ret = -1; - local->op_errno = ENOTEMPTY; - break; - default: - /* @ret number of linkfiles are getting unlinked */ - gf_log (this->name, GF_LOG_TRACE, - "readdir on %s for %s found %d linkfiles", - prev->this->name, local->loc.path, ret); - break; - } - } + conf = this->private; + local = frame->local; - this_call_cnt = dht_frame_return (frame); + if (op_ret < 0) { + gf_msg(this->name, GF_LOG_WARNING, op_errno, DHT_MSG_INODE_LK_ERROR, + "acquiring entrylk after inodelk failed rmdir for %s)", + local->loc.path); - if (is_last_call (this_call_cnt)) { - dht_rmdir_do (frame, this); - } + local->op_ret = -1; + local->op_errno = op_errno; + goto err; + } - return 0; -} + hashed_subvol = local->hashed_subvol; + for (i = 0; i < conf->subvolume_cnt; i++) { + if (hashed_subvol && (hashed_subvol == conf->subvolumes[i])) + continue; + STACK_WIND_COOKIE(frame, dht_rmdir_cbk, conf->subvolumes[i], + conf->subvolumes[i], conf->subvolumes[i]->fops->rmdir, + &local->loc, local->flags, NULL); + } -int -dht_rmdir_opendir_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno, fd_t *fd) -{ - dht_local_t *local = NULL; - int this_call_cnt = -1; - call_frame_t *prev = NULL; + return 0; + +err: + DHT_STACK_UNWIND(rmdir, frame, local->op_ret, local->op_errno, + &local->preparent, &local->postparent, NULL); + return 0; +} - local = frame->local; - prev = cookie; +static int +dht_rmdir_do(call_frame_t *frame, xlator_t *this) +{ + dht_local_t *local = NULL; + dht_conf_t *conf = NULL; + int ret = -1; + xlator_t *hashed_subvol = NULL; + char gfid[GF_UUID_BUF_SIZE] = {0}; + + VALIDATE_OR_GOTO(frame->local, err); + local = frame->local; + VALIDATE_OR_GOTO(this->private, out); + conf = this->private; + + if (local->op_ret == -1) + goto out; + + local->call_cnt = conf->subvolume_cnt; + + /* first remove from non-hashed_subvol */ + hashed_subvol = dht_subvol_get_hashed(this, &local->loc); + + if (!hashed_subvol) { + gf_uuid_unparse(local->loc.gfid, gfid); + + gf_msg(this->name, GF_LOG_WARNING, 0, DHT_MSG_HASHED_SUBVOL_GET_FAILED, + "Failed to get hashed subvol for %s (gfid = %s)", + local->loc.path, gfid); + } else { + local->hashed_subvol = hashed_subvol; + } + + /* When DHT has only 1 child */ + if (conf->subvolume_cnt == 1) { + STACK_WIND_COOKIE(frame, dht_rmdir_hashed_subvol_cbk, + conf->subvolumes[0], conf->subvolumes[0], + conf->subvolumes[0]->fops->rmdir, &local->loc, + local->flags, NULL); + return 0; + } - if (op_ret == -1) { - gf_log (this->name, GF_LOG_DEBUG, - "opendir on %s for %s failed (%s)", - prev->this->name, local->loc.path, - strerror (op_errno)); - goto err; - } + local->current = &local->lock[0]; + ret = dht_protect_namespace(frame, &local->loc, local->hashed_subvol, + &local->current->ns, dht_rmdir_lock_cbk); + if (ret < 0) { + local->op_ret = -1; + local->op_errno = errno ? errno : EINVAL; + goto out; + } - STACK_WIND (frame, dht_rmdir_readdirp_cbk, - prev->this, prev->this->fops->readdirp, - local->fd, 4096, 0); + return 0; - return 0; +out: + dht_set_fixed_dir_stat(&local->preparent); + dht_set_fixed_dir_stat(&local->postparent); + DHT_STACK_UNWIND(rmdir, frame, local->op_ret, local->op_errno, + &local->preparent, &local->postparent, NULL); + return 0; err: - this_call_cnt = dht_frame_return (frame); + DHT_STACK_UNWIND(rmdir, frame, -1, EINVAL, NULL, NULL, NULL); + return 0; +} + +static void +dht_rmdir_readdirp_done(call_frame_t *readdirp_frame, xlator_t *this) +{ + call_frame_t *main_frame = NULL; + dht_local_t *main_local = NULL; + dht_local_t *local = NULL; + int this_call_cnt = 0; + + local = readdirp_frame->local; + main_frame = local->main_frame; + main_local = main_frame->local; + + /* At least one readdirp failed. + * This is a bit hit or miss - if readdirp failed on more than + * one subvol, we don't know which error is returned. + */ + if (local->op_ret == -1) { + main_local->op_ret = local->op_ret; + main_local->op_errno = local->op_errno; + } + + this_call_cnt = dht_frame_return(main_frame); + + if (is_last_call(this_call_cnt)) + dht_rmdir_do(main_frame, this); + + DHT_STACK_DESTROY(readdirp_frame); +} + +/* Keep sending readdirp on the subvol until it returns no more entries + * It is possible that not all entries will fit in a single readdirp in + * which case the rmdir will keep failing with ENOTEMPTY + */ + +static int +dht_rmdir_readdirp_do(call_frame_t *readdirp_frame, xlator_t *this) +{ + dht_local_t *local = NULL; + + local = readdirp_frame->local; - if (is_last_call (this_call_cnt)) { - dht_rmdir_do (frame, this); - } + if (local->op_ret == -1) { + /* there is no point doing another readdirp on this + * subvol . */ + dht_rmdir_readdirp_done(readdirp_frame, this); + return 0; + } + + STACK_WIND_COOKIE(readdirp_frame, dht_rmdir_readdirp_cbk, + local->hashed_subvol, local->hashed_subvol, + local->hashed_subvol->fops->readdirp, local->fd, 4096, 0, + local->xattr); - return 0; + return 0; } +static int +dht_rmdir_linkfile_unlink_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, struct iatt *preparent, + struct iatt *postparent, dict_t *xdata) +{ + dht_local_t *local = NULL; + xlator_t *prev = NULL; + xlator_t *src = NULL; + call_frame_t *readdirp_frame = NULL; + dht_local_t *readdirp_local = NULL; + int this_call_cnt = 0; + char gfid[GF_UUID_BUF_SIZE] = {0}; + + local = frame->local; + prev = cookie; + src = prev; + + readdirp_frame = local->main_frame; + readdirp_local = readdirp_frame->local; + + gf_uuid_unparse(local->loc.gfid, gfid); + + if (op_ret == 0) { + gf_msg_trace(this->name, 0, "Unlinked linkfile %s on %s, gfid = %s", + local->loc.path, src->name, gfid); + } else { + if (op_errno != ENOENT) { + readdirp_local->op_ret = -1; + readdirp_local->op_errno = op_errno; + } + gf_msg_debug(this->name, op_errno, + "Unlink of %s on %s failed. (gfid = %s)", local->loc.path, + src->name, gfid); + } -int -dht_rmdir (call_frame_t *frame, xlator_t *this, loc_t *loc) -{ - dht_local_t *local = NULL; - dht_conf_t *conf = NULL; - int op_errno = -1; - int i = -1; - int ret = -1; - - - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (loc, err); - VALIDATE_OR_GOTO (loc->inode, err); - VALIDATE_OR_GOTO (loc->path, err); - - conf = this->private; - - local = dht_local_init (frame); - if (!local) { - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - op_errno = ENOMEM; - goto err; - } - - local->call_cnt = conf->subvolume_cnt; - local->op_ret = 0; - - ret = loc_copy (&local->loc, loc); - if (ret == -1) { - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - op_errno = ENOMEM; - goto err; - } - - local->fd = fd_create (local->loc.inode, frame->root->pid); - if (!local->fd) { - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - op_errno = ENOMEM; - goto err; - } - - for (i = 0; i < conf->subvolume_cnt; i++) { - STACK_WIND (frame, dht_rmdir_opendir_cbk, - conf->subvolumes[i], - conf->subvolumes[i]->fops->opendir, - loc, local->fd); - } - - return 0; + this_call_cnt = dht_frame_return(readdirp_frame); -err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (rmdir, frame, -1, op_errno, - NULL, NULL); + if (is_last_call(this_call_cnt)) + dht_rmdir_readdirp_do(readdirp_frame, this); - return 0; + DHT_STACK_DESTROY(frame); + return 0; } +static int +dht_rmdir_lookup_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, inode_t *inode, + struct iatt *stbuf, dict_t *xattr, struct iatt *parent) +{ + dht_local_t *local = NULL; + xlator_t *prev = NULL; + xlator_t *src = NULL; + call_frame_t *readdirp_frame = NULL; + dht_local_t *readdirp_local = NULL; + int this_call_cnt = 0; + dht_conf_t *conf = this->private; + char gfid[GF_UUID_BUF_SIZE] = {0}; + + local = frame->local; + prev = cookie; + src = prev; + + gf_msg_debug(this->name, 0, "dht_rmdir_lookup_cbk %s", local->loc.path); + + readdirp_frame = local->main_frame; + readdirp_local = readdirp_frame->local; + + if (op_ret != 0) { + gf_msg(this->name, GF_LOG_WARNING, op_errno, DHT_MSG_FILE_LOOKUP_FAILED, + "lookup failed for %s on %s", local->loc.path, src->name); + goto err; + } + + if (!check_is_linkfile(inode, stbuf, xattr, conf->link_xattr_name)) { + readdirp_local->op_ret = -1; + readdirp_local->op_errno = ENOTEMPTY; + + gf_uuid_unparse(local->loc.gfid, gfid); + + gf_msg(this->name, GF_LOG_WARNING, 0, DHT_MSG_NOT_LINK_FILE_ERROR, + "%s on %s is not a linkfile (type=0%o, gfid = %s)", + local->loc.path, src->name, stbuf->ia_type, gfid); + goto err; + } + + STACK_WIND_COOKIE(frame, dht_rmdir_linkfile_unlink_cbk, src, src, + src->fops->unlink, &local->loc, 0, NULL); + return 0; +err: -int -dht_xattrop_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int32_t op_ret, int32_t op_errno, dict_t *dict) + this_call_cnt = dht_frame_return(readdirp_frame); + if (is_last_call(this_call_cnt)) { + dht_rmdir_readdirp_do(readdirp_frame, this); + } + + DHT_STACK_DESTROY(frame); + return 0; +} + +static int +dht_rmdir_cached_lookup_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, inode_t *inode, + struct iatt *stbuf, dict_t *xattr, + struct iatt *parent) { - DHT_STACK_UNWIND (xattrop, frame, op_ret, op_errno, dict); - return 0; + dht_local_t *local = NULL; + xlator_t *src = NULL; + call_frame_t *readdirp_frame = NULL; + dht_local_t *readdirp_local = NULL; + int this_call_cnt = 0; + dht_conf_t *conf = this->private; + dict_t *xattrs = NULL; + int ret = 0; + + local = frame->local; + src = local->hashed_subvol; + + /* main_frame here is the readdirp_frame */ + + readdirp_frame = local->main_frame; + readdirp_local = readdirp_frame->local; + + gf_msg_debug(this->name, 0, "returning for %s ", local->loc.path); + + if (op_ret == 0) { + readdirp_local->op_ret = -1; + readdirp_local->op_errno = ENOTEMPTY; + + gf_msg(this->name, GF_LOG_WARNING, 0, DHT_MSG_SUBVOL_ERROR, + "%s found on cached subvol %s", local->loc.path, src->name); + goto err; + } else if (op_errno != ENOENT) { + readdirp_local->op_ret = -1; + readdirp_local->op_errno = op_errno; + + gf_msg(this->name, GF_LOG_WARNING, op_errno, DHT_MSG_SUBVOL_ERROR, + "%s not found on cached subvol %s", local->loc.path, src->name); + goto err; + } + + xattrs = dict_new(); + if (!xattrs) { + gf_msg(this->name, GF_LOG_ERROR, ENOMEM, DHT_MSG_NO_MEMORY, + "dict_new failed"); + goto err; + } + + ret = dict_set_uint32(xattrs, conf->link_xattr_name, 256); + if (ret) { + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_DICT_SET_FAILED, + "Failed to set dictionary value: key = %s", + conf->link_xattr_name); + if (xattrs) + dict_unref(xattrs); + goto err; + } + STACK_WIND_COOKIE(frame, dht_rmdir_lookup_cbk, src, src, src->fops->lookup, + &local->loc, xattrs); + if (xattrs) + dict_unref(xattrs); + + return 0; +err: + + this_call_cnt = dht_frame_return(readdirp_frame); + + /* Once all the lookups/unlinks etc have returned, proceed to wind + * readdirp on the subvol again until no entries are returned. + * This is required if there are more entries than can be returned + * in a single readdirp call. + */ + + if (is_last_call(this_call_cnt)) + dht_rmdir_readdirp_do(readdirp_frame, this); + + DHT_STACK_DESTROY(frame); + return 0; } +static int +dht_rmdir_is_subvol_empty(call_frame_t *frame, xlator_t *this, + gf_dirent_t *entries, xlator_t *src) +{ + int ret = 0; + int build_ret = 0; + gf_dirent_t *trav = NULL; + call_frame_t *lookup_frame = NULL; + dht_local_t *lookup_local = NULL; + dht_local_t *local = NULL; + dict_t *xattrs = NULL; + dht_conf_t *conf = this->private; + xlator_t *subvol = NULL; + char gfid[GF_UUID_BUF_SIZE] = {0}; + int count = 0; + gf_boolean_t unwind = _gf_false; + + local = frame->local; + + list_for_each_entry(trav, &entries->list, list) + { + if (strcmp(trav->d_name, ".") == 0) + continue; + if (strcmp(trav->d_name, "..") == 0) + continue; + if (check_is_linkfile(NULL, (&trav->d_stat), trav->dict, + conf->link_xattr_name)) { + count++; + continue; + } + + /* this entry is either a directory which is neither "." nor "..", + or a non directory which is not a linkfile. the directory is to + be treated as non-empty + */ + return 0; + } + + xattrs = dict_new(); + if (!xattrs) { + gf_msg(this->name, GF_LOG_ERROR, ENOMEM, DHT_MSG_NO_MEMORY, + "dict_new failed"); + return -1; + } + + ret = dict_set_uint32(xattrs, conf->link_xattr_name, 256); + if (ret) { + gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_DICT_SET_FAILED, + "Failed to set dictionary value: key = %s", + conf->link_xattr_name); + + if (xattrs) + dict_unref(xattrs); + return -1; + } + + local->call_cnt = count; + ret = 0; + + list_for_each_entry(trav, &entries->list, list) + { + if (strcmp(trav->d_name, ".") == 0) + continue; + if (strcmp(trav->d_name, "..") == 0) + continue; + + lookup_frame = copy_frame(frame); + + if (!lookup_frame) { + /* out of memory, let the rmdir fail + (as non-empty, unfortunately) */ + goto err; + } + + lookup_local = dht_local_init(lookup_frame, NULL, NULL, GF_FOP_LOOKUP); + if (!lookup_local) { + goto err; + } -int -dht_xattrop (call_frame_t *frame, xlator_t *this, loc_t *loc, - gf_xattrop_flags_t flags, dict_t *dict) -{ - xlator_t *subvol = NULL; - int op_errno = -1; - dht_local_t *local = NULL; - - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (loc, err); - VALIDATE_OR_GOTO (loc->inode, err); - VALIDATE_OR_GOTO (loc->path, err); - - subvol = dht_subvol_get_cached (this, loc->inode); - if (!subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no cached subvolume for path=%s", loc->path); - op_errno = EINVAL; - goto err; - } - - local = dht_local_init (frame); - if (!local) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } - - local->inode = inode_ref (loc->inode); - local->call_cnt = 1; - - STACK_WIND (frame, - dht_xattrop_cbk, - subvol, subvol->fops->xattrop, - loc, flags, dict); - - return 0; + lookup_frame->local = lookup_local; + lookup_local->main_frame = frame; + lookup_local->hashed_subvol = src; + build_ret = dht_build_child_loc(this, &lookup_local->loc, &local->loc, + trav->d_name); + if (build_ret != 0) + goto err; + + gf_uuid_copy(lookup_local->loc.gfid, trav->d_stat.ia_gfid); + + gf_uuid_unparse(lookup_local->loc.gfid, gfid); + + gf_msg_trace(this->name, 0, "looking up %s on subvolume %s, gfid = %s", + lookup_local->loc.path, src->name, gfid); + + subvol = dht_linkfile_subvol(this, NULL, &trav->d_stat, trav->dict); + if (!subvol || (subvol == src)) { + /* we need to delete the linkto file if it does not have a + * valid subvol or it points to itself. + */ + gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_INVALID_LINKFILE, + "Linkfile does not have link subvolume. " + "path = %s, gfid = %s", + lookup_local->loc.path, gfid); + + gf_msg_debug(this->name, 0, "looking up %s on subvol %s, gfid = %s", + lookup_local->loc.path, src->name, gfid); + + STACK_WIND_COOKIE(lookup_frame, dht_rmdir_lookup_cbk, src, src, + src->fops->lookup, &lookup_local->loc, xattrs); + } else { + gf_msg_debug(this->name, 0, + "Looking up linkfile target %s on " + " subvol %s, gfid = %s", + lookup_local->loc.path, subvol->name, gfid); + + STACK_WIND(lookup_frame, dht_rmdir_cached_lookup_cbk, subvol, + subvol->fops->lookup, &lookup_local->loc, xattrs); + } + ret++; + + lookup_frame = NULL; + lookup_local = NULL; + } + + if (xattrs) + dict_unref(xattrs); + + return ret; err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (xattrop, frame, -1, op_errno, NULL); + if (xattrs) + dict_unref(xattrs); - return 0; + if (lookup_frame) + DHT_STACK_DESTROY(lookup_frame); + + /* Handle the case where the wound calls have unwound before the + * loop processing is done + */ + + LOCK(&frame->lock); + { + local->op_ret = -1; + local->op_errno = ENOTEMPTY; + + local->call_cnt -= (count - ret); + if (!local->call_cnt) + unwind = _gf_true; + } + UNLOCK(&frame->lock); + + if (!unwind) { + return ret; + } + return 0; } +/* + * No more entries on this subvol. Proceed to the actual rmdir operation. + */ -int -dht_fxattrop_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int32_t op_ret, int32_t op_errno, dict_t *dict) +static int +dht_rmdir_readdirp_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, gf_dirent_t *entries, + dict_t *xdata) { - DHT_STACK_UNWIND (fxattrop, frame, op_ret, op_errno, dict); - return 0; -} + dht_local_t *local = NULL; + xlator_t *prev = NULL; + xlator_t *src = NULL; + int ret = 0; + char *path = NULL; + + local = frame->local; + prev = cookie; + src = prev; + + if (op_ret > 2) { + /* dht_rmdir_is_subvol_empty() may free the frame, + * copy path for logging. + */ + path = gf_strdup(local->loc.path); + + ret = dht_rmdir_is_subvol_empty(frame, this, entries, src); + + switch (ret) { + case 0: /* non linkfiles exist */ + gf_msg_trace(this->name, 0, + "readdir on %s for %s returned %d " + "entries", + prev->name, local->loc.path, op_ret); + local->op_ret = -1; + local->op_errno = ENOTEMPTY; + break; + default: + /* @ret number of linkfiles are getting unlinked */ + gf_msg_trace(this->name, 0, + "readdir on %s for %s found %d " + "linkfiles", + prev->name, path, ret); + break; + } + } + /* readdirp failed or no linkto files were found on this subvol */ + if (!ret) + dht_rmdir_readdirp_done(frame, this); -int -dht_fxattrop (call_frame_t *frame, xlator_t *this, - fd_t *fd, gf_xattrop_flags_t flags, dict_t *dict) + GF_FREE(path); + return 0; +} + +static int +dht_rmdir_opendir_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, fd_t *fd, dict_t *xdata) { - xlator_t *subvol = NULL; - int op_errno = -1; + dht_local_t *local = NULL; + int this_call_cnt = -1; + xlator_t *prev = NULL; + int ret = 0; + dht_conf_t *conf = this->private; + dict_t *dict = NULL; + int i = 0; + char gfid[GF_UUID_BUF_SIZE] = {0}; + dht_local_t *readdirp_local = NULL; + call_frame_t *readdirp_frame = NULL; + int cnt = 0; + + local = frame->local; + prev = cookie; + + this_call_cnt = dht_frame_return(frame); + if (op_ret == -1) { + gf_uuid_unparse(local->loc.gfid, gfid); + + gf_msg_debug(this->name, op_errno, + "opendir on %s for %s failed, " + "gfid = %s,", + prev->name, local->loc.path, gfid); + if ((op_errno != ENOENT) && (op_errno != ESTALE)) { + local->op_ret = -1; + local->op_errno = op_errno; + } + goto err; + } - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (fd, err); + if (!is_last_call(this_call_cnt)) + return 0; - subvol = dht_subvol_get_cached (this, fd->inode); - if (!subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no cached subvolume for fd=%p", fd); - op_errno = EINVAL; - goto err; - } + if (local->op_ret == -1) + goto err; - STACK_WIND (frame, - dht_fxattrop_cbk, - subvol, subvol->fops->fxattrop, - fd, flags, dict); + fd_bind(fd); - return 0; + dict = dict_new(); + if (!dict) { + local->op_ret = -1; + local->op_errno = ENOMEM; + goto err; + } -err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (fxattrop, frame, -1, op_errno, NULL); + ret = dict_set_uint32(dict, conf->link_xattr_name, 256); + if (ret) + gf_msg(this->name, GF_LOG_WARNING, 0, DHT_MSG_DICT_SET_FAILED, + "%s: Failed to set dictionary value:key = %s", local->loc.path, + conf->link_xattr_name); - return 0; -} + cnt = local->call_cnt = conf->subvolume_cnt; + /* Create a separate frame per subvol as we might need + * to resend readdirp multiple times to get all the + * entries. + */ -int -dht_inodelk_cbk (call_frame_t *frame, void *cookie, - xlator_t *this, int32_t op_ret, int32_t op_errno) + for (i = 0; i < conf->subvolume_cnt; i++) { + readdirp_frame = copy_frame(frame); -{ - DHT_STACK_UNWIND (inodelk, frame, op_ret, op_errno); - return 0; -} + if (!readdirp_frame) { + cnt--; + /* Reduce the local->call_cnt as well */ + (void)dht_frame_return(frame); + continue; + } + readdirp_local = dht_local_init(readdirp_frame, &local->loc, local->fd, + 0); -int32_t -dht_inodelk (call_frame_t *frame, xlator_t *this, - const char *volume, loc_t *loc, int32_t cmd, struct flock *lock) -{ - xlator_t *subvol = NULL; - int op_errno = -1; - dht_local_t *local = NULL; - - - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (loc, err); - VALIDATE_OR_GOTO (loc->inode, err); - VALIDATE_OR_GOTO (loc->path, err); - - subvol = dht_subvol_get_cached (this, loc->inode); - if (!subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no cached subvolume for path=%s", loc->path); - op_errno = EINVAL; - goto err; - } - - local = dht_local_init (frame); - if (!local) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } - - local->inode = inode_ref (loc->inode); - local->call_cnt = 1; - - STACK_WIND (frame, - dht_inodelk_cbk, - subvol, subvol->fops->inodelk, - volume, loc, cmd, lock); - - return 0; + if (!readdirp_local) { + DHT_STACK_DESTROY(readdirp_frame); + cnt--; + /* Reduce the local->call_cnt as well */ + dht_frame_return(frame); + continue; + } + readdirp_local->main_frame = frame; + readdirp_local->op_ret = 0; + readdirp_local->xattr = dict_ref(dict); + /* overload this field to save the subvol info */ + readdirp_local->hashed_subvol = conf->subvolumes[i]; + + STACK_WIND_COOKIE(readdirp_frame, dht_rmdir_readdirp_cbk, + conf->subvolumes[i], conf->subvolumes[i], + conf->subvolumes[i]->fops->readdirp, + readdirp_local->fd, 4096, 0, readdirp_local->xattr); + } + + if (dict) + dict_unref(dict); + + /* Could not wind readdirp to any subvol */ + + if (!cnt) + goto err; + + return 0; err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (inodelk, frame, -1, op_errno); + if (is_last_call(this_call_cnt)) { + dht_rmdir_do(frame, this); + } - return 0; + return 0; } - int -dht_finodelk_cbk (call_frame_t *frame, void *cookie, - xlator_t *this, int32_t op_ret, int32_t op_errno) - +dht_rmdir(call_frame_t *frame, xlator_t *this, loc_t *loc, int flags, + dict_t *xdata) { - DHT_STACK_UNWIND (finodelk, frame, op_ret, op_errno); - return 0; + dht_local_t *local = NULL; + dht_conf_t *conf = NULL; + int op_errno = -1; + int i = -1; + int ret = -1; + dict_t *xattr_req = NULL; + + VALIDATE_OR_GOTO(frame, err); + VALIDATE_OR_GOTO(this, err); + VALIDATE_OR_GOTO(loc, err); + VALIDATE_OR_GOTO(loc->inode, err); + VALIDATE_OR_GOTO(loc->path, err); + VALIDATE_OR_GOTO(this->private, err); + + conf = this->private; + + local = dht_local_init(frame, loc, NULL, GF_FOP_RMDIR); + if (!local) { + op_errno = ENOMEM; + goto err; + } + + local->call_cnt = conf->subvolume_cnt; + local->op_ret = 0; + local->fop_succeeded = 0; + + local->flags = flags; + + local->fd = fd_create(local->loc.inode, frame->root->pid); + if (!local->fd) { + op_errno = ENOMEM; + goto err; + } + + if (flags) { + return dht_rmdir_do(frame, this); + } + if (xdata) { + xattr_req = dict_ref(xdata); + } else { + xattr_req = dict_new(); + } + if (xattr_req) { + ret = dict_set_uint32(xattr_req, conf->link_xattr_name, 256); + /* If parallel-readdir is enabled, this is required + * to handle stale linkto files in the directory + * being deleted. If this fails, log an error but + * do not prevent the operation. + */ + if (ret) { + gf_msg(this->name, GF_LOG_ERROR, 0, 0, "%s: failed to set key %s", + loc->path, conf->link_xattr_name); + } + } else { + gf_msg(this->name, GF_LOG_ERROR, 0, 0, "%s: failed to set key %s", + loc->path, conf->link_xattr_name); + } + + for (i = 0; i < conf->subvolume_cnt; i++) { + STACK_WIND_COOKIE(frame, dht_rmdir_opendir_cbk, conf->subvolumes[i], + conf->subvolumes[i], + conf->subvolumes[i]->fops->opendir, loc, local->fd, + xattr_req); + } + + if (xattr_req) { + dict_unref(xattr_req); + } + return 0; + +err: + op_errno = (op_errno == -1) ? errno : op_errno; + DHT_STACK_UNWIND(rmdir, frame, -1, op_errno, NULL, NULL, NULL); + + return 0; } +static int +dht_entrylk_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, dict_t *xdata) + +{ + DHT_STACK_UNWIND(entrylk, frame, op_ret, op_errno, xdata); + return 0; +} +/* TODO + * Sending entrylk to cached subvol can result in stale lock + * as described in the bug 1311002. + */ int -dht_finodelk (call_frame_t *frame, xlator_t *this, - const char *volume, fd_t *fd, int32_t cmd, struct flock *lock) +dht_entrylk(call_frame_t *frame, xlator_t *this, const char *volume, loc_t *loc, + const char *basename, entrylk_cmd cmd, entrylk_type type, + dict_t *xdata) { - xlator_t *subvol = NULL; - int op_errno = -1; + xlator_t *subvol = NULL; + int op_errno = -1; + dht_local_t *local = NULL; + char gfid[GF_UUID_BUF_SIZE] = {0}; + + VALIDATE_OR_GOTO(frame, err); + VALIDATE_OR_GOTO(this, err); + VALIDATE_OR_GOTO(loc, err); + VALIDATE_OR_GOTO(loc->inode, err); + + local = dht_local_init(frame, loc, NULL, GF_FOP_ENTRYLK); + if (!local) { + op_errno = ENOMEM; + goto err; + } - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (fd, err); + subvol = local->cached_subvol; + if (!subvol) { + gf_uuid_unparse(loc->gfid, gfid); - subvol = dht_subvol_get_cached (this, fd->inode); - if (!subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no cached subvolume for fd=%p", fd); - op_errno = EINVAL; - goto err; - } + gf_msg_debug(this->name, 0, + "no cached subvolume for path=%s, " + "gfid = %s", + loc->path, gfid); + op_errno = EINVAL; + goto err; + } + local->call_cnt = 1; - STACK_WIND (frame, - dht_finodelk_cbk, - subvol, subvol->fops->finodelk, - volume, fd, cmd, lock); + STACK_WIND(frame, dht_entrylk_cbk, subvol, subvol->fops->entrylk, volume, + loc, basename, cmd, type, xdata); - return 0; + return 0; err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (finodelk, frame, -1, op_errno); + op_errno = (op_errno == -1) ? errno : op_errno; + DHT_STACK_UNWIND(entrylk, frame, -1, op_errno, NULL); - return 0; + return 0; } - -int -dht_entrylk_cbk (call_frame_t *frame, void *cookie, - xlator_t *this, int32_t op_ret, int32_t op_errno) +static int +dht_fentrylk_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, dict_t *xdata) { - DHT_STACK_UNWIND (entrylk, frame, op_ret, op_errno); - return 0; + DHT_STACK_UNWIND(fentrylk, frame, op_ret, op_errno, NULL); + return 0; } - int -dht_entrylk (call_frame_t *frame, xlator_t *this, - const char *volume, loc_t *loc, const char *basename, - entrylk_cmd cmd, entrylk_type type) -{ - xlator_t *subvol = NULL; - int op_errno = -1; - dht_local_t *local = NULL; - - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (loc, err); - VALIDATE_OR_GOTO (loc->inode, err); - VALIDATE_OR_GOTO (loc->path, err); - - subvol = dht_subvol_get_cached (this, loc->inode); - if (!subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no cached subvolume for path=%s", loc->path); - op_errno = EINVAL; - goto err; - } - - local = dht_local_init (frame); - if (!local) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } - - local->inode = inode_ref (loc->inode); - local->call_cnt = 1; - - STACK_WIND (frame, dht_entrylk_cbk, - subvol, subvol->fops->entrylk, - volume, loc, basename, cmd, type); - - return 0; +dht_fentrylk(call_frame_t *frame, xlator_t *this, const char *volume, fd_t *fd, + const char *basename, entrylk_cmd cmd, entrylk_type type, + dict_t *xdata) +{ + xlator_t *subvol = NULL; + int op_errno = -1; + char gfid[GF_UUID_BUF_SIZE] = {0}; + + VALIDATE_OR_GOTO(frame, err); + VALIDATE_OR_GOTO(this, err); + VALIDATE_OR_GOTO(fd, err); + VALIDATE_OR_GOTO(fd->inode, err); + + gf_uuid_unparse(fd->inode->gfid, gfid); + + subvol = dht_subvol_get_cached(this, fd->inode); + if (!subvol) { + gf_msg_debug(this->name, 0, + "No cached subvolume for fd=%p," + " gfid = %s", + fd, gfid); + op_errno = EINVAL; + goto err; + } + + STACK_WIND(frame, dht_fentrylk_cbk, subvol, subvol->fops->fentrylk, volume, + fd, basename, cmd, type, xdata); + + return 0; err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (entrylk, frame, -1, op_errno); + op_errno = (op_errno == -1) ? errno : op_errno; + DHT_STACK_UNWIND(fentrylk, frame, -1, op_errno, NULL); - return 0; + return 0; } +static int32_t +dht_ipc_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, + int32_t op_errno, dict_t *xdata) +{ + dht_local_t *local = NULL; + int this_call_cnt = 0; -int -dht_fentrylk_cbk (call_frame_t *frame, void *cookie, - xlator_t *this, int32_t op_ret, int32_t op_errno) + GF_VALIDATE_OR_GOTO("dht", frame, out); + GF_VALIDATE_OR_GOTO("dht", this, out); + GF_VALIDATE_OR_GOTO("dht", frame->local, out); -{ - DHT_STACK_UNWIND (fentrylk, frame, op_ret, op_errno); - return 0; -} + local = frame->local; + + LOCK(&frame->lock); + { + if (op_ret < 0 && op_errno != ENOTCONN) { + local->op_errno = op_errno; + goto unlock; + } + local->op_ret = 0; + } +unlock: + UNLOCK(&frame->lock); + this_call_cnt = dht_frame_return(frame); + if (is_last_call(this_call_cnt)) { + DHT_STACK_UNWIND(ipc, frame, local->op_ret, local->op_errno, NULL); + } -int -dht_fentrylk (call_frame_t *frame, xlator_t *this, - const char *volume, fd_t *fd, const char *basename, - entrylk_cmd cmd, entrylk_type type) +out: + return 0; +} + +int32_t +dht_ipc(call_frame_t *frame, xlator_t *this, int32_t op, dict_t *xdata) { - xlator_t *subvol = NULL; - int op_errno = -1; + dht_local_t *local = NULL; + int op_errno = EINVAL; + dht_conf_t *conf = NULL; + int call_cnt = 0; + int i = 0; - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (fd, err); + VALIDATE_OR_GOTO(frame, err); + VALIDATE_OR_GOTO(this, err); - subvol = dht_subvol_get_cached (this, fd->inode); - if (!subvol) { - gf_log (this->name, GF_LOG_DEBUG, - "no cached subvolume for fd=%p", fd); - op_errno = EINVAL; - goto err; - } + if (op != GF_IPC_TARGET_UPCALL) + goto wind_default; - STACK_WIND (frame, dht_fentrylk_cbk, - subvol, subvol->fops->fentrylk, - volume, fd, basename, cmd, type); + VALIDATE_OR_GOTO(this->private, err); + conf = this->private; - return 0; + local = dht_local_init(frame, NULL, NULL, GF_FOP_IPC); + if (!local) { + op_errno = ENOMEM; + goto err; + } + + call_cnt = conf->subvolume_cnt; + local->call_cnt = call_cnt; + + if (xdata) { + if (dict_set_int8(xdata, conf->xattr_name, 0) < 0) + goto err; + } + + for (i = 0; i < call_cnt; i++) { + STACK_WIND(frame, dht_ipc_cbk, conf->subvolumes[i], + conf->subvolumes[i]->fops->ipc, op, xdata); + } + + return 0; err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (fentrylk, frame, -1, op_errno); + DHT_STACK_UNWIND(ipc, frame, -1, op_errno, NULL); - return 0; + return 0; + +wind_default: + STACK_WIND(frame, default_ipc_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->ipc, op, xdata); + return 0; } +int +dht_forget(xlator_t *this, inode_t *inode) +{ + uint64_t ctx_int = 0; + dht_inode_ctx_t *ctx = NULL; + dht_layout_t *layout = NULL; + + inode_ctx_del(inode, this, &ctx_int); + + if (!ctx_int) + return 0; + + ctx = (dht_inode_ctx_t *)(long)ctx_int; + + layout = ctx->layout; + ctx->layout = NULL; + dht_layout_unref(this, layout); + GF_FREE(ctx); + + return 0; +} int -dht_setattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno, struct stat *statpre, - struct stat *statpost) -{ - dht_local_t *local = NULL; - int this_call_cnt = 0; - call_frame_t *prev = NULL; - - - local = frame->local; - prev = cookie; - - LOCK (&frame->lock); - { - if (op_ret == -1) { - local->op_errno = op_errno; - gf_log (this->name, GF_LOG_DEBUG, - "subvolume %s returned -1 (%s)", - prev->this->name, strerror (op_errno)); - goto unlock; - } - - dht_stat_merge (this, &local->prebuf, statpre, prev->this); - dht_stat_merge (this, &local->stbuf, statpost, prev->this); - - if (local->inode) { - local->prebuf.st_ino = local->inode->ino; - local->stbuf.st_ino = local->inode->ino; +dht_notify(xlator_t *this, int event, void *data, ...) +{ + xlator_t *subvol = NULL; + int cnt = -1; + int i = -1; + dht_conf_t *conf = NULL; + int ret = -1; + int propagate = 0; + + int had_heard_from_all = 0; + int have_heard_from_all = 0; + gf_defrag_info_t *defrag = NULL; + dict_t *dict = NULL; + gf_defrag_type cmd = 0; + dict_t *output = NULL; + va_list ap; + struct gf_upcall *up_data = NULL; + struct gf_upcall_cache_invalidation *up_ci = NULL; + + conf = this->private; + GF_VALIDATE_OR_GOTO(this->name, conf, out); + + /* had all subvolumes reported status once till now? */ + had_heard_from_all = 1; + for (i = 0; i < conf->subvolume_cnt; i++) { + if (!conf->last_event[i]) { + had_heard_from_all = 0; + } + } + + switch (event) { + case GF_EVENT_CHILD_UP: + subvol = data; + + conf->gen++; + + for (i = 0; i < conf->subvolume_cnt; i++) { + if (subvol == conf->subvolumes[i]) { + cnt = i; + break; } + } + + if (cnt == -1) { + gf_msg_debug(this->name, 0, + "got GF_EVENT_CHILD_UP bad " + "subvolume %s", + subvol->name); + break; + } + + LOCK(&conf->subvolume_lock); + { + conf->subvolume_status[cnt] = 1; + conf->last_event[cnt] = event; + conf->subvol_up_time[cnt] = gf_time(); + } + UNLOCK(&conf->subvolume_lock); + + /* one of the node came back up, do a stat update */ + dht_get_du_info_for_subvol(this, cnt); + + break; + + case GF_EVENT_SOME_DESCENDENT_UP: + subvol = data; + conf->gen++; + propagate = 1; + + break; + + case GF_EVENT_SOME_DESCENDENT_DOWN: + subvol = data; + propagate = 1; + + break; + + case GF_EVENT_CHILD_DOWN: + subvol = data; + + if (conf->assert_no_child_down) { + gf_msg(this->name, GF_LOG_WARNING, 0, DHT_MSG_CHILD_DOWN, + "Received CHILD_DOWN. Exiting"); + if (conf->defrag) { + gf_defrag_stop(conf, GF_DEFRAG_STATUS_FAILED, NULL); + } else { + kill(getpid(), SIGTERM); + } + } - local->op_ret = 0; - } -unlock: - UNLOCK (&frame->lock); + for (i = 0; i < conf->subvolume_cnt; i++) { + if (subvol == conf->subvolumes[i]) { + cnt = i; + break; + } + } + + if (cnt == -1) { + gf_msg_debug(this->name, 0, + "got GF_EVENT_CHILD_DOWN bad " + "subvolume %s", + subvol->name); + break; + } + + LOCK(&conf->subvolume_lock); + { + conf->subvolume_status[cnt] = 0; + conf->last_event[cnt] = event; + conf->subvol_up_time[cnt] = 0; + } + UNLOCK(&conf->subvolume_lock); + + for (i = 0; i < conf->subvolume_cnt; i++) + if (conf->last_event[i] != event) + event = GF_EVENT_SOME_DESCENDENT_DOWN; + break; + + case GF_EVENT_CHILD_CONNECTING: + subvol = data; + + for (i = 0; i < conf->subvolume_cnt; i++) { + if (subvol == conf->subvolumes[i]) { + cnt = i; + break; + } + } + + if (cnt == -1) { + gf_msg_debug(this->name, 0, + "got GF_EVENT_CHILD_CONNECTING" + " bad subvolume %s", + subvol->name); + break; + } + + LOCK(&conf->subvolume_lock); + { + conf->last_event[cnt] = event; + } + UNLOCK(&conf->subvolume_lock); + + break; + case GF_EVENT_VOLUME_DEFRAG: { + if (!conf->defrag) { + return ret; + } + defrag = conf->defrag; + + dict = data; + va_start(ap, data); + output = va_arg(ap, dict_t *); + + ret = dict_get_int32(dict, "rebalance-command", (int32_t *)&cmd); + if (ret) { + va_end(ap); + return ret; + } + LOCK(&defrag->lock); + { + if (defrag->is_exiting) + goto unlock; + if ((cmd == GF_DEFRAG_CMD_STATUS) || + (cmd == GF_DEFRAG_CMD_DETACH_STATUS)) + gf_defrag_status_get(conf, output); + else if (cmd == GF_DEFRAG_CMD_DETACH_START) + defrag->cmd = GF_DEFRAG_CMD_DETACH_START; + else if (cmd == GF_DEFRAG_CMD_STOP || + cmd == GF_DEFRAG_CMD_DETACH_STOP) + gf_defrag_stop(conf, GF_DEFRAG_STATUS_STOPPED, output); + } + unlock: + UNLOCK(&defrag->lock); + va_end(ap); + return ret; + break; + } + case GF_EVENT_UPCALL: + up_data = (struct gf_upcall *)data; + if (up_data->event_type != GF_UPCALL_CACHE_INVALIDATION) + break; + up_ci = (struct gf_upcall_cache_invalidation *)up_data->data; + + /* Since md-cache will be aggressively filtering lookups, + * the stale layout issue will be more pronounced. Hence + * when a layout xattr is changed by the rebalance process + * notify all the md-cache clients to invalidate the existing + * stat cache and send the lookup next time*/ + if (up_ci->dict && dict_get(up_ci->dict, conf->xattr_name)) + up_ci->flags |= UP_EXPLICIT_LOOKUP; + + /* TODO: Instead of invalidating iatt, update the new + * hashed/cached subvolume in dht inode_ctx */ + if (IS_DHT_LINKFILE_MODE(&up_ci->stat)) + up_ci->flags |= UP_EXPLICIT_LOOKUP; + + propagate = 1; + break; + default: + propagate = 1; + break; + } + + /* have all subvolumes reported status once by now? */ + have_heard_from_all = 1; + for (i = 0; i < conf->subvolume_cnt; i++) { + if (!conf->last_event[i]) + have_heard_from_all = 0; + } + + /* if all subvols have reported status, no need to hide anything + or wait for anything else. Just propagate blindly */ + if (have_heard_from_all) { + propagate = 1; + } + + if (!had_heard_from_all && have_heard_from_all) { + static int run_defrag = 0; + /* This is the first event which completes aggregation + of events from all subvolumes. If at least one subvol + had come up, propagate CHILD_UP, but only this time + */ + event = GF_EVENT_CHILD_DOWN; - this_call_cnt = dht_frame_return (frame); - if (is_last_call (this_call_cnt)) - DHT_STACK_UNWIND (setattr, frame, local->op_ret, local->op_errno, - &local->prebuf, &local->stbuf); + for (i = 0; i < conf->subvolume_cnt; i++) { + if (conf->last_event[i] == GF_EVENT_CHILD_UP) { + event = GF_EVENT_CHILD_UP; + break; + } + + if (conf->last_event[i] == GF_EVENT_CHILD_CONNECTING) { + event = GF_EVENT_CHILD_CONNECTING; + /* continue to check other events for CHILD_UP */ + } + } - return 0; -} + /* Rebalance is started with assert_no_child_down. So we do + * not need to handle CHILD_DOWN event here. + * + * If there is a graph switch, we should not restart the + * rebalance daemon. Use 'run_defrag' to indicate if the + * thread has already started. + */ + if (conf->defrag && !run_defrag) { + run_defrag = 1; + ret = gf_thread_create(&conf->defrag->th, NULL, gf_defrag_start, + this, "dhtdg"); + if (ret) { + GF_FREE(conf->defrag); + conf->defrag = NULL; + kill(getpid(), SIGTERM); + } + } + } + ret = 0; + if (propagate) + ret = default_notify(this, event, data); +out: + return ret; +} int -dht_setattr (call_frame_t *frame, xlator_t *this, loc_t *loc, - struct stat *stbuf, int32_t valid) -{ - dht_layout_t *layout = NULL; - dht_local_t *local = NULL; - int op_errno = -1; - int i = -1; - - - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (loc, err); - VALIDATE_OR_GOTO (loc->inode, err); - VALIDATE_OR_GOTO (loc->path, err); - - local = dht_local_init (frame); - if (!local) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_DEBUG, - "memory allocation failed :("); - goto err; - } - - local->layout = layout = dht_layout_get (this, loc->inode); - if (!layout) { - gf_log (this->name, GF_LOG_DEBUG, - "no layout for path=%s", loc->path); - op_errno = EINVAL; - goto err; - } - - if (!layout_is_sane (layout)) { - gf_log (this->name, GF_LOG_DEBUG, - "layout is not sane for path=%s", loc->path); - op_errno = EINVAL; - goto err; - } - - local->inode = inode_ref (loc->inode); - local->call_cnt = layout->cnt; - - for (i = 0; i < layout->cnt; i++) { - STACK_WIND (frame, dht_setattr_cbk, - layout->list[i].xlator, - layout->list[i].xlator->fops->setattr, - loc, stbuf, valid); - } - - return 0; +dht_inode_ctx_layout_get(inode_t *inode, xlator_t *this, dht_layout_t **layout) +{ + dht_inode_ctx_t *ctx = NULL; + int ret = -1; -err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (setattr, frame, -1, op_errno, NULL, NULL); + ret = dht_inode_ctx_get(inode, this, &ctx); + + if (!ret && ctx) { + if (ctx->layout) { + if (layout) + *layout = ctx->layout; + ret = 0; + } else { + ret = -1; + } + } - return 0; + return ret; } +void +dht_log_new_layout_for_dir_selfheal(xlator_t *this, loc_t *loc, + dht_layout_t *layout) +{ + char string[2048] = {0}; + char *output_string = NULL; + int len = 0; + int off = 0; + int i = 0; + gf_loglevel_t log_level = gf_log_get_loglevel(); + int ret = 0; -int -dht_fsetattr (call_frame_t *frame, xlator_t *this, fd_t *fd, struct stat *stbuf, - int32_t valid) -{ - dht_layout_t *layout = NULL; - dht_local_t *local = NULL; - int op_errno = -1; - int i = -1; - - - VALIDATE_OR_GOTO (frame, err); - VALIDATE_OR_GOTO (this, err); - VALIDATE_OR_GOTO (fd, err); - - local = dht_local_init (frame); - if (!local) { - op_errno = ENOMEM; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - goto err; - } - - local->layout = layout = dht_layout_get (this, fd->inode); - if (!layout) { - gf_log (this->name, GF_LOG_DEBUG, - "no layout for fd=%p", fd); - op_errno = EINVAL; - goto err; - } - - if (!layout_is_sane (layout)) { - gf_log (this->name, GF_LOG_DEBUG, - "layout is not sane for fd=%p", fd); - op_errno = EINVAL; - goto err; - } - - local->inode = inode_ref (fd->inode); - local->call_cnt = layout->cnt; - - for (i = 0; i < layout->cnt; i++) { - STACK_WIND (frame, dht_setattr_cbk, - layout->list[i].xlator, - layout->list[i].xlator->fops->fsetattr, - fd, stbuf, valid); - } - - return 0; + if (log_level < GF_LOG_INFO) + return; -err: - op_errno = (op_errno == -1) ? errno : op_errno; - DHT_STACK_UNWIND (fsetattr, frame, -1, op_errno, NULL, NULL); + if (!layout) + return; - return 0; -} + if (!layout->cnt) + return; + if (!loc) + return; -int -dht_forget (xlator_t *this, inode_t *inode) -{ - uint64_t tmp_layout = 0; - dht_layout_t *layout = NULL; + if (!loc->path) + return; + + ret = snprintf(string, sizeof(string), "Setting layout of %s with ", + loc->path); + + if (ret < 0) + return; + + len += ret; + + /* Calculation of total length of the string required to calloc + * output_string. Log includes subvolume-name, start-range, end-range + * and err value. + * + * This log will help to debug cases where: + * a) Different processes set different layout of a directory. + * b) Error captured in lookup, which will be filled in layout->err + * (like ENOENT, ESTALE etc) + */ + + for (i = 0; i < layout->cnt; i++) { + ret = snprintf(string, sizeof(string), + "[Subvol_name: %s, Err: %d , Start: " + "0x%x, Stop: 0x%x, Hash: 0x%x], ", + layout->list[i].xlator->name, layout->list[i].err, + layout->list[i].start, layout->list[i].stop, + layout->list[i].commit_hash); + + if (ret < 0) + return; - inode_ctx_get (inode, this, &tmp_layout); + len += ret; + } - if (!tmp_layout) - return 0; + len++; - layout = (dht_layout_t *)(long)tmp_layout; - dht_layout_unref (this, layout); + output_string = GF_MALLOC(len + 1, gf_common_mt_char); - return 0; + if (!output_string) + return; + + ret = snprintf(output_string, len + 1, "Setting layout of %s with ", + loc->path); + + if (ret < 0) + goto err; + + off += ret; + + for (i = 0; i < layout->cnt; i++) { + ret = snprintf(output_string + off, len - off, + "[Subvol_name: %s, Err: %d , Start: " + "0x%x, Stop: 0x%x, Hash: 0x%x], ", + layout->list[i].xlator->name, layout->list[i].err, + layout->list[i].start, layout->list[i].stop, + layout->list[i].commit_hash); + + if (ret < 0) + goto err; + + off += ret; + } + + gf_msg(this->name, GF_LOG_DEBUG, 0, DHT_MSG_LOG_FIXED_LAYOUT, "%s", + output_string); + +err: + GF_FREE(output_string); } +int32_t +dht_migration_get_dst_subvol(xlator_t *this, dht_local_t *local) +{ + int ret = -1; + if (!local) + goto out; -int -dht_init_subvolumes (xlator_t *this, dht_conf_t *conf) + local->rebalance.target_node = dht_subvol_get_hashed(this, &local->loc); + + if (local->rebalance.target_node) + ret = 0; + +out: + return ret; +} + +/* +This function should not be called more then once during a FOP +handling path. It is valid only for for ops on files +*/ +int32_t +dht_set_local_rebalance(xlator_t *this, dht_local_t *local, struct iatt *stbuf, + struct iatt *prebuf, struct iatt *postbuf, + dict_t *xdata) { - xlator_list_t *subvols = NULL; - int cnt = 0; + if (!local) + return -1; + if (local->rebalance.set) { + gf_msg(this->name, GF_LOG_WARNING, 0, DHT_MSG_REBAL_STRUCT_SET, + "local->rebalance already set"); + } - for (subvols = this->children; subvols; subvols = subvols->next) - cnt++; + if (stbuf) + memcpy(&local->rebalance.stbuf, stbuf, sizeof(struct iatt)); - conf->subvolumes = CALLOC (cnt, sizeof (xlator_t *)); - if (!conf->subvolumes) { - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - return -1; - } - conf->subvolume_cnt = cnt; + if (prebuf) + memcpy(&local->rebalance.prebuf, prebuf, sizeof(struct iatt)); - cnt = 0; - for (subvols = this->children; subvols; subvols = subvols->next) - conf->subvolumes[cnt++] = subvols->xlator; + if (postbuf) + memcpy(&local->rebalance.postbuf, postbuf, sizeof(struct iatt)); - conf->subvolume_status = CALLOC (cnt, sizeof (char)); - if (!conf->subvolume_status) { - gf_log (this->name, GF_LOG_ERROR, - "Out of memory"); - return -1; - } + if (xdata) + local->rebalance.xdata = dict_ref(xdata); - return 0; + local->rebalance.set = 1; + + return 0; } +int32_t +dht_release(xlator_t *this, fd_t *fd) +{ + return dht_fd_ctx_destroy(this, fd); +} -int -dht_notify (xlator_t *this, int event, void *data, ...) +static int +dht_pt_mkdir_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, + int op_errno, inode_t *inode, struct iatt *stbuf, + struct iatt *preparent, struct iatt *postparent, dict_t *xdata) { - xlator_t *subvol = NULL; - int cnt = -1; - int i = -1; - dht_conf_t *conf = NULL; - int ret = -1; + dht_local_t *local = NULL; + local = frame->local; - conf = this->private; + if (!op_ret) { + dht_layout_set(this, inode, local->layout); + } - switch (event) { - case GF_EVENT_CHILD_UP: - subvol = data; + DHT_STACK_UNWIND(mkdir, frame, op_ret, op_errno, inode, stbuf, preparent, + postparent, NULL); - conf->gen++; + return 0; +} + +int32_t +dht_pt_mkdir(call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode, + mode_t umask, dict_t *xdata) +{ + dht_layout_t *layout = NULL; + dht_conf_t *conf = NULL; + dht_local_t *local = NULL; + bool free_xdata = false; + int ret = 0; + int op_errno = 0; + int32_t *disk_layout_p = NULL; + + conf = this->private; + + local = dht_local_init(frame, loc, NULL, GF_FOP_MKDIR); + if (!local) { + op_errno = ENOMEM; + goto err; + } + + layout = dht_layout_new(this, conf->subvolume_cnt); + if (!layout) + goto wind; + + local->layout = layout; + + if (!xdata) { + xdata = dict_new(); + if (!xdata) + goto wind; + free_xdata = true; + } + + /*Set the xlator or the following will crash*/ + layout->list[0].xlator = conf->subvolumes[0]; + + dht_selfheal_layout_new_directory(frame, loc, layout); + + dht_disk_layout_extract(this, layout, 0, &disk_layout_p); + + ret = dict_set_bin(xdata, conf->xattr_name, disk_layout_p, 4 * 4); + if (ret) { + gf_msg("dht", GF_LOG_DEBUG, EINVAL, DHT_MSG_DICT_SET_FAILED, + "dht layout dict set failed"); + } +wind: + STACK_WIND(frame, dht_pt_mkdir_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->mkdir, loc, mode, umask, xdata); + if (free_xdata) + dict_unref(xdata); + return 0; - for (i = 0; i < conf->subvolume_cnt; i++) { - if (subvol == conf->subvolumes[i]) { - cnt = i; - break; - } - } +err: + op_errno = local ? local->op_errno : op_errno; + DHT_STACK_UNWIND(mkdir, frame, -1, op_errno, NULL, NULL, NULL, NULL, NULL); - if (cnt == -1) { - gf_log (this->name, GF_LOG_DEBUG, - "got GF_EVENT_CHILD_UP bad subvolume %s", - subvol->name); - break; - } + return 0; +} - LOCK (&conf->subvolume_lock); - { - conf->subvolume_status[cnt] = 1; - } - UNLOCK (&conf->subvolume_lock); +static int +dht_pt_getxattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, dict_t *xattr, dict_t *xdata) +{ + dht_conf_t *conf = NULL; - /* one of the node came back up, do a stat update */ - dht_get_du_info_for_subvol (this, cnt); + conf = this->private; + dict_del(xattr, conf->xattr_name); + dict_del(xattr, conf->mds_xattr_key); + dict_del(xattr, conf->commithash_xattr_name); - break; + if (frame->root->pid >= 0) { + GF_REMOVE_INTERNAL_XATTR("trusted.glusterfs.quota*", xattr); + GF_REMOVE_INTERNAL_XATTR("trusted.pgfid*", xattr); + } - case GF_EVENT_CHILD_DOWN: - subvol = data; + DHT_STACK_UNWIND(getxattr, frame, op_ret, op_errno, xattr, xdata); + return 0; +} - for (i = 0; i < conf->subvolume_cnt; i++) { - if (subvol == conf->subvolumes[i]) { - cnt = i; - break; - } - } +int +dht_pt_getxattr(call_frame_t *frame, xlator_t *this, loc_t *loc, + const char *key, dict_t *xdata) +{ + STACK_WIND(frame, dht_pt_getxattr_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->getxattr, loc, key, xdata); + return 0; +} - if (cnt == -1) { - gf_log (this->name, GF_LOG_DEBUG, - "got GF_EVENT_CHILD_DOWN bad subvolume %s", - subvol->name); - break; - } +static int +dht_pt_fgetxattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, dict_t *xattr, dict_t *xdata) +{ + dht_conf_t *conf = NULL; - LOCK (&conf->subvolume_lock); - { - conf->subvolume_status[cnt] = 0; - } - UNLOCK (&conf->subvolume_lock); + conf = this->private; + dict_del(xattr, conf->xattr_name); - break; - } + if (frame->root->pid >= 0) { + GF_REMOVE_INTERNAL_XATTR("trusted.glusterfs.quota*", xattr); + GF_REMOVE_INTERNAL_XATTR("trusted.pgfid*", xattr); + } - ret = default_notify (this, event, data); + DHT_STACK_UNWIND(fgetxattr, frame, op_ret, op_errno, xattr, xdata); + return 0; +} - return ret; +int +dht_pt_fgetxattr(call_frame_t *frame, xlator_t *this, fd_t *fd, const char *key, + dict_t *xdata) +{ + STACK_WIND(frame, dht_pt_fgetxattr_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->fgetxattr, fd, key, xdata); + return 0; } +/* The job of this function is to check if all the xlators have updated + * error in the layout. */ +int +dht_dir_layout_error_check(xlator_t *this, inode_t *inode) +{ + dht_layout_t *layout = NULL; + int i = 0; + + layout = dht_layout_get(this, inode); + for (i = 0; i < layout->cnt; i++) { + if (layout->list[i].err == 0) { + return 0; + } + } + + /* Returning the first xlator error as all xlators have errors */ + return layout->list[0].err; +} |