/* Copyright (c) 2008-2012 Red Hat, Inc. This file is part of GlusterFS. 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. */ #include #include #include #include #include #include #ifndef _CONFIG_H #define _CONFIG_H #include "config.h" #endif #include "glusterfs.h" #include "afr.h" #include "dict.h" #include "xlator.h" #include "hashfn.h" #include "logging.h" #include "stack.h" #include "list.h" #include "call-stub.h" #include "defaults.h" #include "common-utils.h" #include "compat-errno.h" #include "compat.h" #include "byte-order.h" #include "afr-transaction.h" #include "afr-self-heal.h" #include "afr-self-heal-common.h" #include "afr-self-heal-algorithm.h" int afr_sh_data_fail (call_frame_t *frame, xlator_t *this); static inline gf_boolean_t afr_sh_data_proceed (unsigned int success_count) { return (success_count >= AFR_SH_MIN_PARTICIPANTS); } extern int sh_loop_finish (call_frame_t *loop_frame, xlator_t *this); int afr_post_sh_big_lock_success (call_frame_t *frame, xlator_t *this); int afr_post_sh_big_lock_failure (call_frame_t *frame, xlator_t *this); int afr_sh_data_finish (call_frame_t *frame, xlator_t *this); int afr_sh_data_done (call_frame_t *frame, xlator_t *this) { afr_local_t *local = NULL; afr_self_heal_t *sh = NULL; local = frame->local; sh = &local->self_heal; sh->completion_cbk (frame, this); return 0; } int afr_sh_data_flush_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, dict_t *xdata) { afr_local_t *local = NULL; afr_private_t *priv = NULL; int call_count = 0; int child_index = (long) cookie; local = frame->local; priv = this->private; LOCK (&frame->lock); { if (op_ret == -1) { gf_log (this->name, GF_LOG_INFO, "flush failed on %s on subvolume %s: %s", local->loc.path, priv->children[child_index]->name, strerror (op_errno)); } } UNLOCK (&frame->lock); call_count = afr_frame_return (frame); if (call_count == 0) { afr_sh_data_done (frame, this); } return 0; } int afr_sh_data_close (call_frame_t *frame, xlator_t *this) { afr_local_t *local = NULL; afr_private_t *priv = NULL; afr_self_heal_t *sh = NULL; int i = 0; int call_count = 0; local = frame->local; sh = &local->self_heal; priv = this->private; call_count = afr_set_elem_count_get (sh->success, priv->child_count); local->call_count = call_count; if (call_count == 0) { afr_sh_data_done (frame, this); return 0; } for (i = 0; i < priv->child_count; i++) { if (!sh->success[i]) continue; gf_log (this->name, GF_LOG_DEBUG, "closing fd of %s on %s", local->loc.path, priv->children[i]->name); STACK_WIND_COOKIE (frame, afr_sh_data_flush_cbk, (void *) (long) i, priv->children[i], priv->children[i]->fops->flush, sh->healing_fd, NULL); if (!--call_count) break; } return 0; } int afr_sh_data_setattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, struct iatt *statpre, struct iatt *statpost, dict_t *xdata) { afr_local_t *local = NULL; afr_private_t *priv = NULL; int call_count = 0; int child_index = (long) cookie; local = frame->local; priv = this->private; LOCK (&frame->lock); { if (op_ret == -1) { gf_log (this->name, GF_LOG_INFO, "setattr failed on %s on subvolume %s: %s", local->loc.path, priv->children[child_index]->name, strerror (op_errno)); } } UNLOCK (&frame->lock); call_count = afr_frame_return (frame); if (call_count == 0) { afr_sh_data_finish (frame, this); } return 0; } int afr_sh_data_setattr (call_frame_t *frame, xlator_t *this) { afr_local_t *local = NULL; afr_private_t *priv = NULL; afr_self_heal_t *sh = NULL; int i = 0; int call_count = 0; int source = 0; int32_t valid = 0; struct iatt stbuf = {0,}; local = frame->local; sh = &local->self_heal; priv = this->private; source = sh->source; valid |= (GF_SET_ATTR_ATIME | GF_SET_ATTR_MTIME); stbuf.ia_atime = sh->buf[source].ia_atime; stbuf.ia_atime_nsec = sh->buf[source].ia_atime_nsec; stbuf.ia_mtime = sh->buf[source].ia_mtime; stbuf.ia_mtime_nsec = sh->buf[source].ia_mtime_nsec; call_count = afr_set_elem_count_get (sh->success, priv->child_count); local->call_count = call_count; if (call_count == 0) { GF_ASSERT (0); afr_sh_data_finish (frame, this); return 0; } for (i = 0; i < priv->child_count; i++) { if (!sh->success[i]) continue; STACK_WIND_COOKIE (frame, afr_sh_data_setattr_cbk, (void *) (long) i, priv->children[i], priv->children[i]->fops->setattr, &local->loc, &stbuf, valid, NULL); if (!--call_count) break; } return 0; } int afr_sh_data_setattr_fstat_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, struct iatt *buf, dict_t *xdata) { afr_local_t *local = NULL; afr_self_heal_t *sh = NULL; int child_index = (long) cookie; local = frame->local; sh = &local->self_heal; GF_ASSERT (sh->source == child_index); if (op_ret != -1) { sh->buf[child_index] = *buf; afr_sh_data_setattr (frame, this); } else { gf_log (this->name, GF_LOG_ERROR, "%s: Failed to set " "time-stamps after self-heal", local->loc.path); afr_sh_data_fail (frame, this); } return 0; } /* * If there are any writes after the self-heal is triggered then the * stbuf stored in local->self_heal.buf[] will be invalid so we do one more * stat on the source and then set the [am]times */ int afr_sh_set_timestamps (call_frame_t *frame, xlator_t *this) { afr_local_t *local = NULL; afr_private_t *priv = NULL; afr_self_heal_t *sh = NULL; local = frame->local; sh = &local->self_heal; priv = this->private; STACK_WIND_COOKIE (frame, afr_sh_data_setattr_fstat_cbk, (void *) (long) sh->source, priv->children[sh->source], priv->children[sh->source]->fops->fstat, sh->healing_fd, NULL); return 0; } //Fun fact, lock_cbk is being used for both lock & unlock int afr_sh_data_unlock (call_frame_t *frame, xlator_t *this, afr_lock_cbk_t lock_cbk) { afr_local_t *local = NULL; afr_internal_lock_t *int_lock = NULL; afr_self_heal_t *sh = NULL; local = frame->local; int_lock = &local->internal_lock; sh = &local->self_heal; GF_ASSERT (sh->data_lock_held); sh->data_lock_held = _gf_false; int_lock->lock_cbk = lock_cbk; afr_unlock (frame, this); return 0; } int afr_sh_data_finish (call_frame_t *frame, xlator_t *this) { afr_local_t *local = NULL; afr_self_heal_t *sh = NULL; local = frame->local; sh = &local->self_heal; gf_log (this->name, GF_LOG_DEBUG, "finishing data selfheal of %s", local->loc.path); if (sh->data_lock_held) afr_sh_data_unlock (frame, this, afr_sh_data_close); else afr_sh_data_close (frame, this); return 0; } int afr_sh_data_fail (call_frame_t *frame, xlator_t *this) { afr_local_t *local = NULL; afr_self_heal_t *sh = NULL; local = frame->local; sh = &local->self_heal; gf_log (this->name, GF_LOG_DEBUG, "finishing failed data selfheal of %s", local->loc.path); sh->op_failed = 1; if (sh->data_lock_held) afr_sh_data_unlock (frame, this, afr_sh_data_close); else afr_sh_data_close (frame, this); return 0; } int afr_sh_data_erase_pending_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, dict_t *xattr, dict_t *xdata) { int call_count = 0; afr_local_t *local = NULL; afr_self_heal_t *sh = NULL; afr_private_t *priv = NULL; int32_t child_index = (long) cookie; priv = this->private; local = frame->local; sh = &local->self_heal; if (op_ret < 0) { gf_log (this->name, GF_LOG_ERROR, "Erasing of pending change " "log failed on %s for subvol %s, reason: %s", local->loc.path, priv->children[child_index]->name, strerror (op_errno)); sh->op_failed = 1; } call_count = afr_frame_return (frame); if (call_count == 0) { if (sh->op_failed) { if (sh->old_loop_frame) sh_loop_finish (sh->old_loop_frame, this); sh->old_loop_frame = NULL; afr_sh_data_fail (frame, this); goto out; } if (!IA_ISREG (sh->type)) { afr_sh_data_finish (frame, this); goto out; } GF_ASSERT (sh->old_loop_frame); afr_sh_data_lock (frame, this, 0, 0, afr_post_sh_big_lock_success, afr_post_sh_big_lock_failure); } out: return 0; } int afr_sh_data_erase_pending (call_frame_t *frame, xlator_t *this) { afr_local_t *local = NULL; afr_self_heal_t *sh = NULL; afr_private_t *priv = NULL; int call_count = 0; int i = 0; dict_t **erase_xattr = NULL; local = frame->local; sh = &local->self_heal; priv = this->private; afr_sh_pending_to_delta (priv, sh->xattr, sh->delta_matrix, sh->success, priv->child_count, AFR_DATA_TRANSACTION); gf_log (this->name, GF_LOG_DEBUG, "Delta matrix for: %s", lkowner_utoa (&frame->root->lk_owner)); afr_sh_print_pending_matrix (sh->delta_matrix, this); erase_xattr = GF_CALLOC (sizeof (*erase_xattr), priv->child_count, gf_afr_mt_dict_t); for (i = 0; i < priv->child_count; i++) { if (sh->xattr[i]) { call_count++; erase_xattr[i] = get_new_dict(); dict_ref (erase_xattr[i]); } } afr_sh_delta_to_xattr (priv, sh->delta_matrix, erase_xattr, priv->child_count, AFR_DATA_TRANSACTION); GF_ASSERT (call_count); local->call_count = call_count; for (i = 0; i < priv->child_count; i++) { if (!erase_xattr[i]) continue; gf_log (this->name, GF_LOG_DEBUG, "erasing pending flags from %s on %s", local->loc.path, priv->children[i]->name); STACK_WIND_COOKIE (frame, afr_sh_data_erase_pending_cbk, (void *) (long) i, priv->children[i], priv->children[i]->fops->fxattrop, sh->healing_fd, GF_XATTROP_ADD_ARRAY, erase_xattr[i], NULL); if (!--call_count) break; } for (i = 0; i < priv->child_count; i++) { if (erase_xattr[i]) { dict_unref (erase_xattr[i]); } } GF_FREE (erase_xattr); return 0; } static struct afr_sh_algorithm * sh_algo_from_name (xlator_t *this, char *name) { int i = 0; while (afr_self_heal_algorithms[i].name) { if (!strcmp (name, afr_self_heal_algorithms[i].name)) { return &afr_self_heal_algorithms[i]; } i++; } return NULL; } static int sh_zero_byte_files_exist (afr_local_t *local, int child_count) { int i = 0; int ret = 0; afr_self_heal_t *sh = NULL; sh = &local->self_heal; for (i = 0; i < child_count; i++) { if (!local->child_up[i] || sh->child_errno[i]) continue; if (sh->buf[i].ia_size == 0) { ret = 1; break; } } return ret; } struct afr_sh_algorithm * afr_sh_data_pick_algo (call_frame_t *frame, xlator_t *this) { afr_private_t * priv = NULL; struct afr_sh_algorithm * algo = NULL; afr_local_t * local = NULL; afr_self_heal_t * sh = NULL; priv = this->private; local = frame->local; sh = &local->self_heal; algo = sh_algo_from_name (this, priv->data_self_heal_algorithm); if (algo == NULL) { /* option not set, so fall back on heuristics */ if (sh_zero_byte_files_exist (local, priv->child_count) || (sh->file_size <= (priv->data_self_heal_window_size * this->ctx->page_size))) { /* * If the file does not exist on one of the subvolumes, * or a zero-byte file exists (created by entry self-heal) * the entire content has to be copied anyway, so there * is no benefit from using the "diff" algorithm. * * If the file size is about the same as page size, * the entire file can be read and written with a few * (pipelined) STACK_WINDs, which will be faster * than "diff" which has to read checksums and then * read and write. */ algo = sh_algo_from_name (this, "full"); } else { algo = sh_algo_from_name (this, "diff"); } } return algo; } int afr_sh_data_sync_prepare (call_frame_t *frame, xlator_t *this) { afr_local_t *local = NULL; afr_self_heal_t *sh = NULL; struct afr_sh_algorithm *sh_algo = NULL; local = frame->local; sh = &local->self_heal; sh->algo_completion_cbk = afr_sh_data_erase_pending; sh->algo_abort_cbk = afr_sh_data_fail; sh_algo = afr_sh_data_pick_algo (frame, this); sh->algo = sh_algo; sh_algo->fn (frame, this); return 0; } int afr_sh_data_trim_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, struct iatt *prebuf, struct iatt *postbuf, dict_t *xdata) { int call_count = 0; int child_index = 0; afr_private_t *priv = NULL; afr_local_t *local = NULL; afr_self_heal_t *sh = NULL; priv = this->private; local = frame->local; sh = &local->self_heal; child_index = (long) cookie; LOCK (&frame->lock); { if (op_ret == -1) { gf_log (this->name, GF_LOG_ERROR, "ftruncate of %s on subvolume %s failed (%s)", local->loc.path, priv->children[child_index]->name, strerror (op_errno)); sh->op_failed = 1; } else { gf_log (this->name, GF_LOG_DEBUG, "ftruncate of %s on subvolume %s completed", local->loc.path, priv->children[child_index]->name); } } UNLOCK (&frame->lock); call_count = afr_frame_return (frame); if (call_count == 0) { if (sh->op_failed) afr_sh_data_fail (frame, this); else afr_sh_data_sync_prepare (frame, this); } return 0; } int afr_sh_data_trim_sinks (call_frame_t *frame, xlator_t *this) { afr_private_t * priv = NULL; afr_local_t * local = NULL; afr_self_heal_t *sh = NULL; int *sources = NULL; int call_count = 0; int i = 0; priv = this->private; local = frame->local; sh = &local->self_heal; sources = sh->sources; call_count = sh->active_sinks; local->call_count = call_count; for (i = 0; i < priv->child_count; i++) { if (sources[i] || !local->child_up[i]) continue; STACK_WIND_COOKIE (frame, afr_sh_data_trim_cbk, (void *) (long) i, priv->children[i], priv->children[i]->fops->ftruncate, sh->healing_fd, sh->file_size, NULL); if (!--call_count) break; } return 0; } int afr_sh_inode_set_read_ctx (afr_self_heal_t *sh, xlator_t *this) { afr_private_t *priv = NULL; int ret = 0; int i = 0; priv = this->private; sh->source = afr_sh_select_source (sh->sources, priv->child_count); if (sh->source < 0) { ret = -1; goto out; } /* detect changes not visible through pending flags -- JIC */ for (i = 0; i < priv->child_count; i++) { if (i == sh->source || sh->child_errno[i]) continue; if (SIZE_DIFFERS (&sh->buf[i], &sh->buf[sh->source])) sh->sources[i] = 0; } afr_reset_children (sh->fresh_children, priv->child_count); afr_get_fresh_children (sh->success_children, sh->sources, sh->fresh_children, priv->child_count); afr_inode_set_read_ctx (this, sh->inode, sh->source, sh->fresh_children); out: return ret; } void afr_sh_data_fix (call_frame_t *frame, xlator_t *this) { int source = 0; afr_local_t *local = NULL; afr_self_heal_t *sh = NULL; afr_private_t *priv = NULL; local = frame->local; sh = &local->self_heal; priv = this->private; source = sh->source; sh->block_size = this->ctx->page_size; sh->file_size = sh->buf[source].ia_size; if (FILE_HAS_HOLES (&sh->buf[source])) sh->file_has_holes = 1; if (sh->background && sh->unwind && !sh->unwound) { sh->unwind (sh->orig_frame, this, sh->op_ret, sh->op_errno, sh->op_failed); sh->unwound = _gf_true; } afr_sh_mark_source_sinks (frame, this); if (sh->active_sinks == 0) { gf_log (this->name, GF_LOG_INFO, "no active sinks for performing self-heal on file %s", local->loc.path); afr_sh_data_finish (frame, this); return; } gf_log (this->name, GF_LOG_DEBUG, "self-healing file %s from subvolume %s to %d other", local->loc.path, priv->children[sh->source]->name, sh->active_sinks); afr_sh_data_trim_sinks (frame, this); } int afr_sh_data_fxattrop_fstat_done (call_frame_t *frame, xlator_t *this) { afr_local_t *local = NULL; afr_self_heal_t *sh = NULL; afr_private_t *priv = NULL; int nsources = 0; int ret = 0; local = frame->local; sh = &local->self_heal; priv = this->private; gf_log (this->name, GF_LOG_DEBUG, "Pending matrix for: %s", lkowner_utoa (&frame->root->lk_owner)); nsources = afr_build_sources (this, sh->xattr, sh->buf, sh->pending_matrix, sh->sources, sh->success_children, AFR_DATA_TRANSACTION, NULL, _gf_true); if ((nsources == -1) && (priv->favorite_child != -1) && (sh->child_errno[priv->favorite_child] == 0)) { gf_log (this->name, GF_LOG_DEBUG, "Picking favorite child %s as authentic source to " "resolve conflicting data of %s", priv->children[priv->favorite_child]->name, local->loc.path); sh->sources[priv->favorite_child] = 1; nsources = afr_sh_source_count (sh->sources, priv->child_count); } if (nsources == -1) { gf_log (this->name, GF_LOG_ERROR, "Unable to self-heal contents of '%s' (possible " "split-brain). Please delete the file from all but " "the preferred subvolume.", local->loc.path); sh->data_spb = _gf_true; afr_sh_data_fail (frame, this); return 0; } sh->data_spb = _gf_false; ret = afr_sh_inode_set_read_ctx (sh, this); if (ret) { gf_log (this->name, GF_LOG_DEBUG, "No active sources found."); afr_sh_data_fail (frame, this); return 0; } if (sh->sync_done) { afr_sh_data_setattr (frame, this); } else { if (nsources == 0) { gf_log (this->name, GF_LOG_DEBUG, "No self-heal needed for %s", local->loc.path); afr_sh_data_finish (frame, this); return 0; } afr_sh_data_fix (frame, this); } return 0; } int afr_lookup_select_read_child_by_txn_type (xlator_t *this, afr_local_t *local, dict_t **xattr, afr_transaction_type txn_type) { afr_private_t *priv = NULL; int read_child = -1; int32_t **pending_matrix = NULL; int32_t *sources = NULL; int32_t *success_children = NULL; struct iatt *bufs = NULL; int32_t nsources = 0; int32_t prev_read_child = -1; int32_t config_read_child = -1; int32_t subvol_status = 0; priv = this->private; bufs = local->cont.lookup.bufs; success_children = local->cont.lookup.success_children; pending_matrix = afr_matrix_create (priv->child_count, priv->child_count); if (NULL == pending_matrix) goto out; sources = local->cont.lookup.sources; memset (sources, 0, sizeof (*sources) * priv->child_count); nsources = afr_build_sources (this, xattr, bufs, pending_matrix, sources, success_children, txn_type, &subvol_status, _gf_false); if (subvol_status & SPLIT_BRAIN) { gf_log (this->name, GF_LOG_WARNING, "%s: Possible split-brain", local->loc.path); switch (txn_type) { case AFR_DATA_TRANSACTION: local->cont.lookup.possible_spb = _gf_true; nsources = 1; sources[success_children[0]] = 1; break; case AFR_ENTRY_TRANSACTION: read_child = afr_get_no_xattr_dir_read_child (this, success_children, bufs); sources[read_child] = 1; nsources = 1; break; default: break; } } if (nsources < 0) goto out; prev_read_child = local->read_child_index; config_read_child = priv->read_child; read_child = afr_select_read_child_from_policy (success_children, priv->child_count, prev_read_child, config_read_child, sources); out: afr_matrix_cleanup (pending_matrix, priv->child_count); gf_log (this->name, GF_LOG_DEBUG, "returning read_child: %d", read_child); return read_child; } int afr_sh_data_special_file_fix (call_frame_t *frame, xlator_t *this) { afr_private_t *priv = NULL; afr_self_heal_t *sh = NULL; afr_local_t *local = NULL; int i = 0; local = frame->local; sh = &local->self_heal; priv = this->private; for (i = 0; i < priv->child_count ; i++) if (1 == local->child_up[i]) sh->success[i] = 1; afr_sh_data_erase_pending (frame, this); return 0; } int afr_sh_data_fstat_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, struct iatt *buf, dict_t *xdata) { afr_private_t *priv = NULL; afr_local_t *local = NULL; afr_self_heal_t *sh = NULL; int call_count = -1; int child_index = (long) cookie; local = frame->local; sh = &local->self_heal; priv = this->private; LOCK (&frame->lock); { if (op_ret != -1) { gf_log (this->name, GF_LOG_TRACE, "fstat of %s on %s succeeded", local->loc.path, priv->children[child_index]->name); sh->buf[child_index] = *buf; sh->success_children[sh->success_count] = child_index; sh->success_count++; } else { gf_log (this->name, GF_LOG_ERROR, "%s: fstat failed " "on %s, reason %s", local->loc.path, priv->children[child_index]->name, strerror (op_errno)); sh->child_errno[child_index] = op_errno; } } UNLOCK (&frame->lock); call_count = afr_frame_return (frame); if (call_count == 0) { /* Previous versions of glusterfs might have set * the pending data xattrs which need to be erased */ if (!afr_sh_data_proceed (sh->success_count)) { gf_log (this->name, GF_LOG_ERROR, "inspecting metadata " "succeeded on < %d children, aborting " "self-heal for %s", AFR_SH_MIN_PARTICIPANTS, local->loc.path); afr_sh_data_fail (frame, this); goto out; } if (IA_ISREG (sh->type)) afr_sh_data_fxattrop_fstat_done (frame, this); else afr_sh_data_special_file_fix (frame, this); } out: return 0; } int afr_sh_data_fstat (call_frame_t *frame, xlator_t *this) { afr_self_heal_t *sh = NULL; afr_local_t *local = NULL; afr_private_t *priv = NULL; int call_count = 0; int i = 0; int child = 0; int32_t *fstat_children = NULL; priv = this->private; local = frame->local; sh = &local->self_heal; fstat_children = memdup (sh->success_children, sizeof (*fstat_children) * priv->child_count); if (!fstat_children) { afr_sh_data_fail (frame, this); goto out; } call_count = sh->success_count; local->call_count = call_count; memset (sh->buf, 0, sizeof (*sh->buf) * priv->child_count); afr_reset_children (sh->success_children, priv->child_count); sh->success_count = 0; for (i = 0; i < priv->child_count; i++) { child = fstat_children[i]; if (child == -1) break; STACK_WIND_COOKIE (frame, afr_sh_data_fstat_cbk, (void *) (long) child, priv->children[child], priv->children[child]->fops->fstat, sh->healing_fd, NULL); --call_count; } GF_ASSERT (!call_count); out: if (fstat_children) GF_FREE (fstat_children); return 0; } void afr_sh_common_fxattrop_resp_handler (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, dict_t *xattr) { afr_private_t *priv = NULL; afr_local_t *local = NULL; afr_self_heal_t *sh = NULL; int child_index = (long) cookie; local = frame->local; sh = &local->self_heal; priv = this->private; LOCK (&frame->lock); { if (op_ret != -1) { gf_log (this->name, GF_LOG_TRACE, "fxattrop of %s on %s succeeded", local->loc.path, priv->children[child_index]->name); sh->xattr[child_index] = dict_ref (xattr); sh->success_children[sh->success_count] = child_index; sh->success_count++; } else { gf_log (this->name, GF_LOG_ERROR, "fxattrop of %s " "failed on %s, reason %s", local->loc.path, priv->children[child_index]->name, strerror (op_errno)); sh->child_errno[child_index] = op_errno; } } UNLOCK (&frame->lock); } int afr_sh_data_fxattrop_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, dict_t *xattr, dict_t *xdata) { int call_count = -1; afr_local_t *local = NULL; afr_self_heal_t *sh = NULL; local = frame->local; sh = &local->self_heal; afr_sh_common_fxattrop_resp_handler (frame, cookie, this, op_ret, op_errno, xattr); call_count = afr_frame_return (frame); if (call_count == 0) { if (!afr_sh_data_proceed (sh->success_count)) { gf_log (this->name, GF_LOG_ERROR, "%s, inspecting " "change log succeeded on < %d children", local->loc.path, AFR_SH_MIN_PARTICIPANTS); afr_sh_data_fail (frame, this); goto out; } afr_sh_data_fstat (frame, this); } out: return 0; } int afr_sh_data_fxattrop (call_frame_t *frame, xlator_t *this) { afr_self_heal_t *sh = NULL; afr_local_t *local = NULL; afr_private_t *priv = NULL; dict_t *xattr_req = NULL; int32_t *zero_pending = NULL; int call_count = 0; int i = 0; int ret = 0; priv = this->private; local = frame->local; sh = &local->self_heal; call_count = afr_up_children_count (local->child_up, priv->child_count); local->call_count = call_count; xattr_req = dict_new(); if (!xattr_req) { ret = -1; goto out; } for (i = 0; i < priv->child_count; i++) { zero_pending = GF_CALLOC (3, sizeof (*zero_pending), gf_afr_mt_int32_t); if (!zero_pending) { ret = -1; goto out; } ret = dict_set_dynptr (xattr_req, priv->pending_key[i], zero_pending, 3 * sizeof (*zero_pending)); if (ret < 0) { gf_log (this->name, GF_LOG_WARNING, "Unable to set dict value"); goto out; } else { zero_pending = NULL; } } afr_reset_xattr (sh->xattr, priv->child_count); afr_reset_children (sh->success_children, priv->child_count); memset (sh->child_errno, 0, sizeof (*sh->child_errno) * priv->child_count); sh->success_count = 0; for (i = 0; i < priv->child_count; i++) { if (local->child_up[i]) { STACK_WIND_COOKIE (frame, afr_sh_data_fxattrop_cbk, (void *) (long) i, priv->children[i], priv->children[i]->fops->fxattrop, sh->healing_fd, GF_XATTROP_ADD_ARRAY, xattr_req, NULL); if (!--call_count) break; } } out: if (xattr_req) dict_unref (xattr_req); if (ret) { if (zero_pending) GF_FREE (zero_pending); afr_sh_data_fail (frame, this); } return 0; } int afr_sh_data_big_lock_success (call_frame_t *frame, xlator_t *this) { afr_local_t *local = NULL; afr_self_heal_t *sh = NULL; local = frame->local; sh = &local->self_heal; sh->data_lock_held = _gf_true; afr_sh_data_fxattrop (frame, this); return 0; } int afr_sh_data_post_blocking_inodelk_cbk (call_frame_t *frame, xlator_t *this) { afr_internal_lock_t *int_lock = NULL; afr_local_t *local = NULL; afr_self_heal_t *sh = NULL; local = frame->local; int_lock = &local->internal_lock; sh = &local->self_heal; if (int_lock->lock_op_ret < 0) { gf_log (this->name, GF_LOG_ERROR, "Blocking data inodelks " "failed for %s. by %s", local->loc.path, lkowner_utoa (&frame->root->lk_owner)); sh->data_lock_failure_handler (frame, this); } else { gf_log (this->name, GF_LOG_DEBUG, "Blocking data inodelks " "done for %s by %s. Proceding to self-heal", local->loc.path, lkowner_utoa (&frame->root->lk_owner)); sh->data_lock_success_handler (frame, this); } return 0; } int afr_sh_data_post_nonblocking_inodelk_cbk (call_frame_t *frame, xlator_t *this) { afr_internal_lock_t *int_lock = NULL; afr_local_t *local = NULL; afr_self_heal_t *sh = NULL; local = frame->local; int_lock = &local->internal_lock; sh = &local->self_heal; if (int_lock->lock_op_ret < 0) { gf_log (this->name, GF_LOG_DEBUG, "Non Blocking data inodelks " "failed for %s. by %s", local->loc.path, lkowner_utoa (&frame->root->lk_owner)); int_lock->lock_cbk = afr_sh_data_post_blocking_inodelk_cbk; afr_blocking_lock (frame, this); } else { gf_log (this->name, GF_LOG_DEBUG, "Non Blocking data inodelks " "done for %s by %s. Proceeding to self-heal", local->loc.path, lkowner_utoa (&frame->root->lk_owner)); sh->data_lock_success_handler (frame, this); } return 0; } int afr_sh_data_lock_rec (call_frame_t *frame, xlator_t *this, off_t start, off_t len) { afr_internal_lock_t *int_lock = NULL; afr_local_t *local = NULL; local = frame->local; int_lock = &local->internal_lock; int_lock->transaction_lk_type = AFR_SELFHEAL_LK; int_lock->selfheal_lk_type = AFR_DATA_SELF_HEAL_LK; afr_set_lock_number (frame, this); int_lock->lk_flock.l_start = start; int_lock->lk_flock.l_len = len; int_lock->lk_flock.l_type = F_WRLCK; int_lock->lock_cbk = afr_sh_data_post_nonblocking_inodelk_cbk; afr_nonblocking_inodelk (frame, this); return 0; } int afr_post_sh_big_lock_success (call_frame_t *frame, xlator_t *this) { afr_local_t *local = NULL; afr_self_heal_t *sh = NULL; local = frame->local; sh = &local->self_heal; GF_ASSERT (sh->old_loop_frame); sh_loop_finish (sh->old_loop_frame, this); sh->old_loop_frame = NULL; sh->data_lock_held = _gf_true; sh->sync_done = _gf_true; afr_sh_data_fxattrop (frame, this); return 0; } int afr_post_sh_big_lock_failure (call_frame_t *frame, xlator_t *this) { afr_local_t *local = NULL; afr_self_heal_t *sh = NULL; local = frame->local; sh = &local->self_heal; GF_ASSERT (sh->old_loop_frame); sh_loop_finish (sh->old_loop_frame, this); sh->old_loop_frame = NULL; afr_sh_set_timestamps (frame, this); return 0; } int afr_sh_data_lock (call_frame_t *frame, xlator_t *this, off_t start, off_t len, afr_lock_cbk_t success_handler, afr_lock_cbk_t failure_handler) { afr_local_t * local = NULL; afr_self_heal_t * sh = NULL; local = frame->local; sh = &local->self_heal; sh->data_lock_success_handler = success_handler; sh->data_lock_failure_handler = failure_handler; return afr_sh_data_lock_rec (frame, this, start, len); } int afr_sh_data_open_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, fd_t *fd, dict_t *xdata) { afr_local_t *local = NULL; afr_self_heal_t *sh = NULL; afr_private_t *priv = NULL; int call_count = 0; int child_index = 0; local = frame->local; sh = &local->self_heal; priv = this->private; child_index = (long) cookie; /* TODO: some of the open's might fail. In that case, modify cleanup fn to send flush on those fd's which are already open */ LOCK (&frame->lock); { if (op_ret == -1) { gf_log (this->name, GF_LOG_ERROR, "open of %s failed on child %s (%s)", local->loc.path, priv->children[child_index]->name, strerror (op_errno)); sh->op_failed = 1; } else { gf_log (this->name, GF_LOG_TRACE, "open of %s succeeded on child %s", local->loc.path, priv->children[child_index]->name); } } UNLOCK (&frame->lock); call_count = afr_frame_return (frame); if (call_count == 0) { if (sh->op_failed) { afr_sh_data_fail (frame, this); return 0; } gf_log (this->name, GF_LOG_TRACE, "fd for %s opened, commencing sync", local->loc.path); afr_sh_data_lock (frame, this, 0, 0, afr_sh_data_big_lock_success, afr_sh_data_fail); } return 0; } int afr_sh_data_open (call_frame_t *frame, xlator_t *this) { int i = 0; int call_count = 0; fd_t *fd = NULL; afr_local_t * local = NULL; afr_private_t * priv = NULL; afr_self_heal_t *sh = NULL; local = frame->local; sh = &local->self_heal; priv = this->private; call_count = afr_up_children_count (local->child_up, priv->child_count); local->call_count = call_count; fd = fd_create (local->loc.inode, frame->root->pid); sh->healing_fd = fd; /* open sinks */ for (i = 0; i < priv->child_count; i++) { if(!local->child_up[i]) continue; STACK_WIND_COOKIE (frame, afr_sh_data_open_cbk, (void *) (long) i, priv->children[i], priv->children[i]->fops->open, &local->loc, O_RDWR|O_LARGEFILE, fd, NULL); if (!--call_count) break; } return 0; } int afr_self_heal_data (call_frame_t *frame, xlator_t *this) { afr_local_t *local = NULL; afr_self_heal_t *sh = NULL; afr_private_t *priv = this->private; local = frame->local; sh = &local->self_heal; /* Self-heal completion cbk changes inode split-brain status based on * govinda_gOvinda, mdata_spb, data_spb values. Initialize data_spb * with current split-brain status. If for some reason self-heal * fails(locking phase etc), it makes sure we retain the split-brain * status before this self-heal started. */ sh->data_spb = afr_is_split_brain (this, sh->inode); if (sh->do_data_self_heal && afr_data_self_heal_enabled (priv->data_self_heal)) { afr_sh_data_open (frame, this); } else { gf_log (this->name, GF_LOG_TRACE, "not doing data self heal on %s", local->loc.path); afr_sh_data_done (frame, this); } return 0; }