/* Copyright (c) 2015 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 "shard.h" #include "shard-mem-types.h" #include "byte-order.h" #include "defaults.h" static gf_boolean_t __is_shard_dir (uuid_t gfid) { shard_priv_t *priv = THIS->private; if (gf_uuid_compare (gfid, priv->dot_shard_gfid) == 0) return _gf_true; return _gf_false; } void shard_make_block_bname (int block_num, uuid_t gfid, char *buf, size_t len) { char gfid_str[GF_UUID_BUF_SIZE] = {0,}; gf_uuid_unparse (gfid, gfid_str); snprintf (buf, len, "%s.%d", gfid_str, block_num); } void shard_make_block_abspath (int block_num, uuid_t gfid, char *filepath, size_t len) { char gfid_str[GF_UUID_BUF_SIZE] = {0,}; gf_uuid_unparse (gfid, gfid_str); snprintf (filepath, len, "/%s/%s.%d", GF_SHARD_DIR, gfid_str, block_num); } int __shard_inode_ctx_get (inode_t *inode, xlator_t *this, shard_inode_ctx_t **ctx) { int ret = -1; uint64_t ctx_uint = 0; shard_inode_ctx_t *ctx_p = NULL; ret = __inode_ctx_get (inode, this, &ctx_uint); if (ret == 0) { *ctx = (shard_inode_ctx_t *) ctx_uint; return ret; } ctx_p = GF_CALLOC (1, sizeof (*ctx_p), gf_shard_mt_inode_ctx_t); if (!ctx_p) return ret; ret = __inode_ctx_set (inode, this, (uint64_t *)&ctx_p); if (ret < 0) { GF_FREE (ctx_p); return ret; } *ctx = ctx_p; return ret; } int __shard_inode_ctx_set (inode_t *inode, xlator_t *this, shard_inode_ctx_t *ctx_in) { int ret = -1; shard_inode_ctx_t *ctx = NULL; ret = __shard_inode_ctx_get (inode, this, &ctx); if (ret) return ret; ctx->block_size = ctx_in->block_size; ctx->mode = ctx_in->mode; ctx->rdev = ctx_in->rdev; return 0; } int shard_inode_ctx_set_all (inode_t *inode, xlator_t *this, shard_inode_ctx_t *ctx_in) { int ret = -1; LOCK (&inode->lock); { ret = __shard_inode_ctx_set (inode, this, ctx_in); } UNLOCK (&inode->lock); return ret; } int __shard_inode_ctx_get_block_size (inode_t *inode, xlator_t *this, uint64_t *block_size) { int ret = -1; uint64_t ctx_uint = 0; shard_inode_ctx_t *ctx = NULL; ret = __inode_ctx_get (inode, this, &ctx_uint); if (ret < 0) return ret; ctx = (shard_inode_ctx_t *) ctx_uint; *block_size = ctx->block_size; return 0; } int shard_inode_ctx_get_block_size (inode_t *inode, xlator_t *this, uint64_t *block_size) { int ret = -1; LOCK (&inode->lock); { ret = __shard_inode_ctx_get_block_size (inode, this, block_size); } UNLOCK (&inode->lock); return ret; } int __shard_inode_ctx_get_all (inode_t *inode, xlator_t *this, shard_inode_ctx_t *ctx_out) { int ret = -1; uint64_t ctx_uint = 0; shard_inode_ctx_t *ctx = NULL; ret = __inode_ctx_get (inode, this, &ctx_uint); if (ret < 0) return ret; ctx = (shard_inode_ctx_t *) ctx_uint; ctx_out->block_size = ctx->block_size; ctx_out->mode = ctx->mode; ctx_out->rdev = ctx->rdev; return 0; } int shard_inode_ctx_get_all (inode_t *inode, xlator_t *this, shard_inode_ctx_t *ctx_out) { int ret = -1; LOCK (&inode->lock); { ret = __shard_inode_ctx_get_all (inode, this, ctx_out); } UNLOCK (&inode->lock); return ret; } void shard_local_wipe (shard_local_t *local) { int i = 0; int count = 0; count = local->num_blocks; loc_wipe (&local->loc); loc_wipe (&local->dot_shard_loc); loc_wipe (&local->loc2); loc_wipe (&local->tmp_loc); if (local->fd) fd_unref (local->fd); if (local->xattr_req) dict_unref (local->xattr_req); if (local->xattr_rsp) dict_unref (local->xattr_rsp); for (i = 0; i < count; i++) { if (!local->inode_list) break; if (local->inode_list[i]) inode_unref (local->inode_list[i]); } GF_FREE (local->inode_list); GF_FREE (local->vector); if (local->iobref) iobref_unref (local->iobref); if (local->list_inited) gf_dirent_free (&local->entries_head); } int shard_modify_size_and_block_count (struct iatt *stbuf, dict_t *dict) { int ret = -1; void *size_attr = NULL; uint64_t size_array[4]; ret = dict_get_ptr (dict, GF_XATTR_SHARD_FILE_SIZE, &size_attr); if (ret) { gf_log (THIS->name, GF_LOG_ERROR, "Failed to get " GF_XATTR_SHARD_FILE_SIZE " for %s", uuid_utoa (stbuf->ia_gfid)); return ret; } memcpy (size_array, size_attr, sizeof (size_array)); stbuf->ia_size = ntoh64 (size_array[0]); stbuf->ia_blocks = ntoh64 (size_array[2]); return 0; } int shard_call_count_return (call_frame_t *frame) { int call_count = 0; shard_local_t *local = NULL; local = frame->local; LOCK (&frame->lock); { call_count = --local->call_count; } UNLOCK (&frame->lock); return call_count; } static int shard_init_dot_shard_loc (xlator_t *this, shard_local_t *local) { int ret = -1; loc_t *dot_shard_loc = NULL; if (!local) return -1; dot_shard_loc = &local->dot_shard_loc; dot_shard_loc->inode = inode_new (this->itable); dot_shard_loc->parent = inode_ref (this->itable->root); ret = inode_path (dot_shard_loc->parent, GF_SHARD_DIR, (char **)&dot_shard_loc->path); if (ret < 0 || !(dot_shard_loc->inode)) { gf_log (this->name, GF_LOG_ERROR, "Inode path failed on %s", GF_SHARD_DIR); goto out; } dot_shard_loc->name = strrchr (dot_shard_loc->path, '/'); if (dot_shard_loc->name) dot_shard_loc->name++; ret = 0; out: return ret; } int shard_common_resolve_shards (call_frame_t *frame, xlator_t *this, inode_t *res_inode, shard_post_resolve_fop_handler_t post_res_handler) { int i = -1; uint32_t shard_idx_iter = 0; char path[PATH_MAX] = {0,}; inode_t *inode = NULL; shard_local_t *local = NULL; local = frame->local; shard_idx_iter = local->first_block; while (shard_idx_iter <= local->last_block) { i++; if (shard_idx_iter == 0) { local->inode_list[i] = inode_ref (res_inode); shard_idx_iter++; continue; } shard_make_block_abspath (shard_idx_iter, res_inode->gfid, path, sizeof(path)); inode = NULL; inode = inode_resolve (this->itable, path); if (inode) { gf_log (this->name, GF_LOG_DEBUG, "Shard %d already " "present. gfid=%s. Saving inode for future.", shard_idx_iter, uuid_utoa(inode->gfid)); shard_idx_iter++; local->inode_list[i] = inode; /* Let the ref on the inodes that are already present * in inode table still be held so that they don't get * forgotten by the time the fop reaches the actual * write stage. */ continue; } else { local->call_count++; shard_idx_iter++; } } post_res_handler (frame, this); return 0; } int shard_update_file_size_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, dict_t *dict, dict_t *xdata) { shard_local_t *local = NULL; local = frame->local; if (op_ret < 0) { local->op_ret = op_ret; local->op_errno = op_errno; goto err; } err: local->post_update_size_handler (frame, this); return 0; } int shard_set_size_attrs (int64_t size, int64_t block_count, int64_t **size_attr_p) { int ret = -1; int64_t *size_attr = NULL; if (!size_attr_p) goto out; size_attr = GF_CALLOC (4, sizeof (int64_t), gf_shard_mt_int64_t); if (!size_attr) goto out; size_attr[0] = hton64 (size); /* As sharding evolves, it _may_ be necessary to embed more pieces of * information within the same xattr. So allocating slots for them in * advance. For now, only bytes 0-63 and 128-191 which would make up the * current size and block count respectively of the file are valid. */ size_attr[2] = hton64 (block_count); *size_attr_p = size_attr; ret = 0; out: return ret; } int shard_update_file_size (call_frame_t *frame, xlator_t *this, fd_t *fd, loc_t *loc, shard_post_update_size_fop_handler_t handler) { int ret = -1; int64_t *size_attr = NULL; inode_t *inode = NULL; shard_local_t *local = NULL; dict_t *xattr_req = NULL; local = frame->local; local->post_update_size_handler = handler; xattr_req = dict_new (); if (!xattr_req) { local->op_ret = -1; local->op_errno = ENOMEM; goto err; } if (fd) inode = fd->inode; else inode = loc->inode; ret = shard_set_size_attrs (local->delta_size + local->hole_size, local->delta_blocks, &size_attr); if (ret) { gf_log (this->name, GF_LOG_ERROR, "Failed to set size attrs for" " %s", uuid_utoa (inode->gfid)); local->op_ret = -1; local->op_errno = ENOMEM; goto err; } ret = dict_set_bin (xattr_req, GF_XATTR_SHARD_FILE_SIZE, size_attr, 8 * 4); if (ret) { gf_log (this->name, GF_LOG_ERROR, "Failed to set key %s into " "dict. gfid=%s", GF_XATTR_SHARD_FILE_SIZE, uuid_utoa (inode->gfid)); GF_FREE (size_attr); local->op_ret = -1; local->op_errno = ENOMEM; goto err; } if (fd) STACK_WIND (frame, shard_update_file_size_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->fxattrop, fd, GF_XATTROP_ADD_ARRAY64, xattr_req, NULL); else STACK_WIND (frame, shard_update_file_size_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->xattrop, loc, GF_XATTROP_ADD_ARRAY64, xattr_req, NULL); dict_unref (xattr_req); return 0; err: if (xattr_req) dict_unref (xattr_req); handler (frame, this); return 0; } static void shard_link_dot_shard_inode (shard_local_t *local, inode_t *inode, struct iatt *buf) { inode_t *linked_inode = NULL; shard_priv_t *priv = NULL; priv = THIS->private; linked_inode = inode_link (inode, local->dot_shard_loc.parent, local->dot_shard_loc.name, buf); inode_lookup (linked_inode); priv->dot_shard_inode = linked_inode; } int shard_lookup_dot_shard_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) { shard_local_t *local = NULL; local = frame->local; if (op_ret) { local->op_ret = op_ret; local->op_errno = op_errno; goto unwind; } if (!IA_ISDIR (buf->ia_type)) { gf_log (this->name, GF_LOG_CRITICAL, "/.shard already exists " "and is not a directory. Please remove /.shard from all" " bricks and try again"); local->op_ret = -1; local->op_errno = EIO; goto unwind; } shard_link_dot_shard_inode (local, inode, buf); shard_common_resolve_shards (frame, this, (local->fop == GF_FOP_RENAME) ? local->loc2.inode : local->loc.inode, local->post_res_handler); return 0; unwind: local->post_res_handler (frame, this); return 0; } int shard_lookup_dot_shard (call_frame_t *frame, xlator_t *this, shard_post_resolve_fop_handler_t post_res_handler) { int ret = -1; dict_t *xattr_req = NULL; shard_priv_t *priv = NULL; shard_local_t *local = NULL; local = frame->local; priv = this->private; local->post_res_handler = post_res_handler; xattr_req = dict_new (); if (!xattr_req) { local->op_ret = -1; local->op_errno = ENOMEM; goto err; } ret = dict_set_static_bin (xattr_req, "gfid-req", priv->dot_shard_gfid, 16); if (ret) { gf_log (this->name, GF_LOG_ERROR, "Failed to set gfid of " "/.shard into dict"); local->op_ret = -1; local->op_errno = ENOMEM; goto err; } STACK_WIND (frame, shard_lookup_dot_shard_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->lookup, &local->dot_shard_loc, xattr_req); dict_unref (xattr_req); return 0; err: if (xattr_req) dict_unref (xattr_req); post_res_handler (frame, this); return 0; } int shard_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) { int ret = 0; uint64_t size = 0; void *bsize = NULL; void *size_attr = NULL; shard_inode_ctx_t ctx_tmp = {0,}; uint64_t size_array[4]; if (op_ret < 0) goto unwind; if (IA_ISDIR (buf->ia_type)) goto unwind; /* If this was a fresh lookup, there are two possibilities: * 1) If the file is sharded (indicated by the presence of block size * xattr), store this block size, along with rdev and mode in its * inode ctx. * 2) If the file is not sharded, store size along with rdev and mode * (which are anyway don't cares) in inode ctx. Since @ctx_tmp is * already initialised to all zeroes, nothing more needs to be done. */ if (shard_inode_ctx_get_block_size (inode, this, &size)) { ret = dict_get_ptr (xdata, GF_XATTR_SHARD_BLOCK_SIZE, &bsize); if (!ret) { ctx_tmp.block_size = ntoh64 (*((uint64_t *)bsize)); ctx_tmp.mode = st_mode_from_ia (buf->ia_prot, buf->ia_type); ctx_tmp.rdev = buf->ia_rdev; } ret = shard_inode_ctx_set_all (inode, this, &ctx_tmp); if (ret) gf_log (this->name, GF_LOG_WARNING, "Failed to set " "inode ctx for %s", uuid_utoa (buf->ia_gfid)); } /* Also, if the file is sharded, get the file size and block cnt xattr, * and store them in the stbuf appropriately. */ ret = dict_get_ptr (xdata, GF_XATTR_SHARD_FILE_SIZE, &size_attr); if (!ret) { memcpy (size_array, size_attr, sizeof (size_array)); buf->ia_size = ntoh64 (size_array[0]); buf->ia_blocks = ntoh64 (size_array[2]); } unwind: SHARD_STACK_UNWIND (lookup, frame, op_ret, op_errno, inode, buf, xdata, postparent); return 0; } int shard_lookup (call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xattr_req) { int ret = -1; int32_t op_errno = ENOMEM; uint64_t block_size = 0; shard_local_t *local = NULL; SHARD_ENTRY_FOP_CHECK (loc, op_errno, err); local = mem_get0 (this->local_pool); if (!local) goto err; frame->local = local; loc_copy (&local->loc, loc); local->xattr_req = xattr_req ? dict_ref (xattr_req) : dict_new (); if (!local->xattr_req) goto err; if (shard_inode_ctx_get_block_size (loc->inode, this, &block_size)) { ret = dict_set_uint64 (local->xattr_req, GF_XATTR_SHARD_BLOCK_SIZE, 0); if (ret) { gf_log (this->name, GF_LOG_WARNING, "Failed to set dict" " value: key:%s for path %s", GF_XATTR_SHARD_BLOCK_SIZE, loc->path); goto err; } } ret = dict_set_uint64 (local->xattr_req, GF_XATTR_SHARD_FILE_SIZE, 8 * 4); if (ret) { gf_log (this->name, GF_LOG_WARNING, "Failed to set dict value: " "key:%s for path %s.", GF_XATTR_SHARD_FILE_SIZE, loc->path); goto err; } if ((xattr_req) && (dict_get (xattr_req, GF_CONTENT_KEY))) dict_del (xattr_req, GF_CONTENT_KEY); STACK_WIND (frame, shard_lookup_cbk, FIRST_CHILD (this), FIRST_CHILD (this)->fops->lookup, loc, local->xattr_req); return 0; err: SHARD_STACK_UNWIND (lookup, frame, -1, op_errno, NULL, NULL, NULL, NULL); return 0; } int shard_lookup_base_file_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) { shard_local_t *local = NULL; local = frame->local; if (op_ret < 0) { local->op_ret = op_ret; local->op_errno = op_errno; goto unwind; } local->prebuf = *buf; if (shard_modify_size_and_block_count (&local->prebuf, xdata)) { local->op_ret = -1; local->op_errno = EINVAL; goto unwind; } unwind: local->handler (frame, this); return 0; } int shard_lookup_base_file (call_frame_t *frame, xlator_t *this, loc_t *loc, shard_post_fop_handler_t handler) { shard_local_t *local = NULL; dict_t *xattr_req = NULL; local = frame->local; local->handler = handler; xattr_req = dict_new (); if (!xattr_req) { local->op_ret = -1; local->op_errno = ENOMEM; goto err; } SHARD_MD_READ_FOP_INIT_REQ_DICT (this, xattr_req, loc->gfid, local, err); STACK_WIND (frame, shard_lookup_base_file_cbk, FIRST_CHILD (this), FIRST_CHILD(this)->fops->lookup, loc, xattr_req); dict_unref (xattr_req); return 0; err: if (xattr_req) dict_unref (xattr_req); handler (frame, this); return 0; } int shard_post_fstat_handler (call_frame_t *frame, xlator_t *this) { shard_local_t *local = NULL; local = frame->local; SHARD_STACK_UNWIND (fstat, frame, local->op_ret, local->op_errno, &local->prebuf, local->xattr_rsp); return 0; } int shard_post_stat_handler (call_frame_t *frame, xlator_t *this) { shard_local_t *local = NULL; local = frame->local; SHARD_STACK_UNWIND (stat, frame, local->op_ret, local->op_errno, &local->prebuf, local->xattr_rsp); return 0; } int shard_common_stat_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, struct iatt *buf, dict_t *xdata) { shard_local_t *local = NULL; local = frame->local; if (op_ret < 0) { local->op_ret = op_ret; local->op_errno = op_errno; goto unwind; } local->prebuf = *buf; if (shard_modify_size_and_block_count (&local->prebuf, xdata)) { local->op_ret = -1; local->op_errno = EINVAL; goto unwind; } local->xattr_rsp = dict_ref (xdata); unwind: local->handler (frame, this); return 0; } int shard_stat (call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xdata) { int ret = -1; uint64_t block_size = 0; shard_local_t *local = NULL; if ((IA_ISDIR (loc->inode->ia_type)) || (IA_ISLNK (loc->inode->ia_type))) { STACK_WIND (frame, default_stat_cbk, FIRST_CHILD (this), FIRST_CHILD (this)->fops->stat, loc, xdata); return 0; } ret = shard_inode_ctx_get_block_size (loc->inode, this, &block_size); if (ret) { gf_log (this->name, GF_LOG_ERROR, "Failed to get block size " "from inode ctx of %s", uuid_utoa (loc->inode->gfid)); goto err; } if (!block_size) { STACK_WIND (frame, default_stat_cbk, FIRST_CHILD (this), FIRST_CHILD (this)->fops->stat, loc, xdata); return 0; } local = mem_get0 (this->local_pool); if (!local) goto err; frame->local = local; local->handler = shard_post_stat_handler; local->xattr_req = (xdata) ? dict_ref (xdata) : dict_new (); if (!local->xattr_req) goto err; SHARD_MD_READ_FOP_INIT_REQ_DICT (this, local->xattr_req, local->loc.gfid, local, err); STACK_WIND (frame, shard_common_stat_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->stat, loc, local->xattr_req); return 0; err: SHARD_STACK_UNWIND (stat, frame, -1, ENOMEM, NULL, NULL); return 0; } int shard_fstat (call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *xdata) { int ret = -1; uint64_t block_size = 0; shard_local_t *local = NULL; if ((IA_ISDIR (fd->inode->ia_type)) || (IA_ISLNK (fd->inode->ia_type))) { STACK_WIND (frame, default_fstat_cbk, FIRST_CHILD(this), FIRST_CHILD (this)->fops->fstat, fd, xdata); return 0; } ret = shard_inode_ctx_get_block_size (fd->inode, this, &block_size); if (ret) { gf_log (this->name, GF_LOG_ERROR, "Failed to get block size " "from inode ctx of %s", uuid_utoa (fd->inode->gfid)); goto err; } if (!block_size) { STACK_WIND (frame, default_fstat_cbk, FIRST_CHILD (this), FIRST_CHILD (this)->fops->fstat, fd, xdata); return 0; } if (!this->itable) this->itable = fd->inode->table; local = mem_get0 (this->local_pool); if (!local) goto err; frame->local = local; local->handler = shard_post_fstat_handler; local->xattr_req = (xdata) ? dict_ref (xdata) : dict_new (); if (!local->xattr_req) goto err; SHARD_MD_READ_FOP_INIT_REQ_DICT (this, local->xattr_req, fd->inode->gfid, local, err); STACK_WIND (frame, shard_common_stat_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->fstat, fd, local->xattr_req); return 0; err: SHARD_STACK_UNWIND (fstat, frame, -1, ENOMEM, NULL, NULL); return 0; } int shard_post_update_size_truncate_handler (call_frame_t *frame, xlator_t *this) { shard_local_t *local = NULL; local = frame->local; if (local->fop == GF_FOP_TRUNCATE) SHARD_STACK_UNWIND (truncate, frame, local->op_ret, local->op_errno, &local->prebuf, &local->postbuf, NULL); else SHARD_STACK_UNWIND (ftruncate, frame, local->op_ret, local->op_errno, &local->prebuf, &local->postbuf, NULL); return 0; } int shard_truncate_last_shard_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) { shard_local_t *local = NULL; local = frame->local; if (op_ret < 0) { local->op_ret = op_ret; local->op_errno = op_errno; goto err; } local->postbuf.ia_size = local->offset; local->postbuf.ia_blocks -= (prebuf->ia_blocks - postbuf->ia_blocks); /* Let the delta be negative. We want xattrop to do subtraction */ local->delta_size = local->postbuf.ia_size - local->prebuf.ia_size; local->delta_blocks = postbuf->ia_blocks - prebuf->ia_blocks; local->hole_size = 0; shard_update_file_size (frame, this, NULL, &local->loc, shard_post_update_size_truncate_handler); return 0; err: if (local->fop == GF_FOP_TRUNCATE) SHARD_STACK_UNWIND (truncate, frame, local->op_ret, local->op_errno, NULL, NULL, NULL); else SHARD_STACK_UNWIND (ftruncate, frame, local->op_ret, local->op_errno, NULL, NULL, NULL); return 0; } int shard_truncate_last_shard (call_frame_t *frame, xlator_t *this, inode_t *inode) { size_t last_shard_size_after = 0; loc_t loc = {0,}; shard_local_t *local = NULL; local = frame->local; loc.inode = inode_ref (inode); gf_uuid_copy (loc.gfid, inode->gfid); last_shard_size_after = (local->offset % local->block_size); STACK_WIND (frame, shard_truncate_last_shard_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->truncate, &loc, last_shard_size_after, NULL); loc_wipe (&loc); return 0; } int shard_unlink_shards_do_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); int shard_truncate_htol (call_frame_t *frame, xlator_t *this, inode_t *inode) { int i = 1; int ret = -1; int call_count = 0; uint32_t cur_block = 0; uint32_t last_block = 0; char path[PATH_MAX] = {0,}; char *bname = NULL; loc_t loc = {0,}; gf_boolean_t wind_failed = _gf_false; shard_local_t *local = NULL; shard_priv_t *priv = NULL; local = frame->local; priv = this->private; cur_block = local->first_block + 1; last_block = local->last_block; /* Determine call count */ for (i = 1; i < local->num_blocks; i++) { if (!local->inode_list[i]) continue; call_count++; } if (!call_count) { /* Call count = 0 implies that all of the shards that need to be * unlinked do not exist. So shard xlator would now proceed to * do the final truncate + size updates. */ local->postbuf.ia_size = local->offset; local->postbuf.ia_blocks = local->prebuf.ia_blocks; local->delta_size = local->postbuf.ia_size - local->prebuf.ia_size; local->delta_blocks = 0; local->hole_size = 0; shard_update_file_size (frame, this, local->fd, &local->loc, shard_post_update_size_truncate_handler); return 0; } local->call_count = call_count; i = 1; while (cur_block <= last_block) { if (!local->inode_list[i]) { cur_block++; i++; continue; } if (wind_failed) { shard_unlink_shards_do_cbk (frame, (void *)(long) cur_block, this, -1, ENOMEM, NULL, NULL, NULL); goto next; } shard_make_block_abspath (cur_block, inode->gfid, path, sizeof (path)); bname = strrchr (path, '/') + 1; loc.parent = inode_ref (priv->dot_shard_inode); ret = inode_path (loc.parent, bname, (char **)&(loc.path)); if (ret < 0) { gf_log (this->name, GF_LOG_ERROR, "Inode path failed " "on %s", bname); local->op_ret = -1; local->op_errno = ENOMEM; loc_wipe (&loc); wind_failed = _gf_true; shard_unlink_shards_do_cbk (frame, (void *)(long) cur_block, this, -1, ENOMEM, NULL, NULL, NULL); goto next; } loc.name = strrchr (loc.path, '/'); if (loc.name) loc.name++; loc.inode = inode_ref (local->inode_list[i]); STACK_WIND_COOKIE (frame, shard_unlink_shards_do_cbk, (void *) (long) cur_block, FIRST_CHILD(this), FIRST_CHILD (this)->fops->unlink, &loc, 0, NULL); loc_wipe (&loc); next: i++; cur_block++; if (!--call_count) break; } return 0; } int shard_truncate_do (call_frame_t *frame, xlator_t *this) { shard_local_t *local = NULL; local = frame->local; if ((local->num_blocks == 1)) { /* This means that there are no shards to be unlinked. * The fop boils down to truncating the last shard, updating * the size and unwinding. */ shard_truncate_last_shard (frame, this, local->inode_list[0]); return 0; } else { shard_truncate_htol (frame, this, local->loc.inode); } return 0; } int shard_post_lookup_shards_truncate_handler (call_frame_t *frame, xlator_t *this) { shard_local_t *local = NULL; local = frame->local; if (local->op_ret < 0) { if (local->fop == GF_FOP_TRUNCATE) SHARD_STACK_UNWIND (truncate, frame, local->op_ret, local->op_errno, NULL, NULL, NULL); else SHARD_STACK_UNWIND (ftruncate, frame, local->op_ret, local->op_errno, NULL, NULL, NULL); return 0; } shard_truncate_do (frame, this); return 0; } void shard_link_block_inode (shard_local_t *local, int block_num, inode_t *inode, struct iatt *buf) { char block_bname[256] = {0,}; inode_t *linked_inode = NULL; shard_priv_t *priv = NULL; priv = THIS->private; shard_make_block_bname (block_num, (local->loc.inode)->gfid, block_bname, sizeof (block_bname)); linked_inode = inode_link (inode, priv->dot_shard_inode, block_bname, buf); inode_lookup (linked_inode); local->inode_list[block_num - local->first_block] = linked_inode; /* Defer unref'ing the inodes until write is complete to prevent * them from getting purged. These inodes are unref'd in the event of * a failure or after successful fop completion in shard_local_wipe(). */ } int shard_common_lookup_shards_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) { int call_count = 0; int shard_block_num = (long) cookie; shard_local_t *local = NULL; local = frame->local; if (op_ret < 0) { /* Ignore absence of shards in the backend in truncate fop. */ if (((local->fop == GF_FOP_TRUNCATE) || (local->fop == GF_FOP_FTRUNCATE)) && (op_errno == ENOENT)) goto done; local->op_ret = op_ret; local->op_errno = op_errno; goto done; } shard_link_block_inode (local, shard_block_num, inode, buf); done: call_count = shard_call_count_return (frame); if (call_count == 0) { if (local->op_ret < 0) goto unwind; else local->pls_fop_handler (frame, this); } return 0; unwind: local->pls_fop_handler (frame, this); return 0; } dict_t* shard_create_gfid_dict (dict_t *dict) { int ret = 0; dict_t *new = NULL; uuid_t *gfid = NULL; new = dict_copy_with_ref (dict, NULL); if (!new) return NULL; gfid = GF_CALLOC (1, sizeof (uuid_t), gf_common_mt_char); if (!gfid) { ret = -1; goto out; } gf_uuid_generate (*gfid); ret = dict_set_dynptr (new, "gfid-req", gfid, sizeof (uuid_t)); out: if (ret) { dict_unref (new); new = NULL; GF_FREE (gfid); } return new; } int shard_common_lookup_shards (call_frame_t *frame, xlator_t *this, inode_t *inode, shard_post_lookup_shards_fop_handler_t handler) { int i = 0; int ret = 0; int call_count = 0; int32_t shard_idx_iter = 0; int last_block = 0; char path[PATH_MAX] = {0,}; char *bname = NULL; loc_t loc = {0,}; shard_local_t *local = NULL; shard_priv_t *priv = NULL; gf_boolean_t wind_failed = _gf_false; dict_t *xattr_req = NULL; priv = this->private; local = frame->local; call_count = local->call_count; shard_idx_iter = local->first_block; last_block = local->last_block; local->pls_fop_handler = handler; while (shard_idx_iter <= last_block) { if (local->inode_list[i]) { i++; shard_idx_iter++; continue; } if (wind_failed) { shard_common_lookup_shards_cbk (frame, (void *) (long) shard_idx_iter, this, -1, ENOMEM, NULL, NULL, NULL, NULL); goto next; } shard_make_block_abspath (shard_idx_iter, inode->gfid, path, sizeof(path)); bname = strrchr (path, '/') + 1; loc.inode = inode_new (this->itable); loc.parent = inode_ref (priv->dot_shard_inode); ret = inode_path (loc.parent, bname, (char **) &(loc.path)); if (ret < 0 || !(loc.inode)) { gf_log (this->name, GF_LOG_ERROR, "Inode path failed on" " %s", bname); local->op_ret = -1; local->op_errno = ENOMEM; loc_wipe (&loc); wind_failed = _gf_true; shard_common_lookup_shards_cbk (frame, (void *) (long) shard_idx_iter, this, -1, ENOMEM, NULL, NULL, NULL, NULL); goto next; } loc.name = strrchr (loc.path, '/'); if (loc.name) loc.name++; xattr_req = shard_create_gfid_dict (local->xattr_req); if (!xattr_req) { local->op_ret = -1; local->op_errno = ENOMEM; wind_failed = _gf_true; loc_wipe (&loc); shard_common_lookup_shards_cbk (frame, (void *) (long) shard_idx_iter, this, -1, ENOMEM, NULL, NULL, NULL, NULL); goto next; } STACK_WIND_COOKIE (frame, shard_common_lookup_shards_cbk, (void *) (long) shard_idx_iter, FIRST_CHILD(this), FIRST_CHILD(this)->fops->lookup, &loc, xattr_req); loc_wipe (&loc); dict_unref (xattr_req); next: shard_idx_iter++; i++; if (!--call_count) break; } return 0; } int shard_post_resolve_truncate_handler (call_frame_t *frame, xlator_t *this) { shard_local_t *local = NULL; local = frame->local; if (local->op_ret < 0) { if (local->op_errno == ENOENT) { /* If lookup on /.shard fails with ENOENT, it means that * the file was 0-byte in size but truncated sometime in * the past to a higher size which is reflected in the * size xattr, and now being truncated to a lower size. * In this case, the only thing that needs to be done is * to update the size xattr of the file and unwind. */ local->first_block = local->last_block = 0; local->num_blocks = 1; local->call_count = 0; local->op_ret = 0; local->postbuf.ia_size = local->offset; shard_update_file_size (frame, this, local->fd, &local->loc, shard_post_update_size_truncate_handler); return 0; } else { if (local->fop == GF_FOP_TRUNCATE) SHARD_STACK_UNWIND (truncate, frame, local->op_ret, local->op_errno, NULL, NULL, NULL); else SHARD_STACK_UNWIND (ftruncate, frame, local->op_ret, local->op_errno, NULL, NULL, NULL); return 0; } } if (!local->call_count) shard_truncate_do (frame, this); else shard_common_lookup_shards (frame, this, local->loc.inode, shard_post_lookup_shards_truncate_handler); return 0; } int shard_truncate_begin (call_frame_t *frame, xlator_t *this) { int ret = 0; shard_local_t *local = NULL; shard_priv_t *priv = NULL; priv = this->private; local = frame->local; /* First participant block here is the lowest numbered block that would * hold the last byte of the file post successful truncation. * Last participant block is the block that contains the last byte in * the current state of the file. * If (first block == last_block): * then that means that the file only needs truncation of the * first (or last since both are same) block. * Else * if (new_size % block_size == 0) * then that means there is no truncate to be done with * only shards from first_block + 1 through the last * block needing to be unlinked. * else * both truncate of the first block and unlink of the * remaining shards until end of file is required. */ local->first_block = (local->offset == 0) ? 0 : get_lowest_block (local->offset - 1, local->block_size); local->last_block = get_highest_block (0, local->prebuf.ia_size, local->block_size); local->num_blocks = local->last_block - local->first_block + 1; if ((local->first_block == 0) && (local->num_blocks == 1)) { if (local->fop == GF_FOP_TRUNCATE) STACK_WIND (frame, shard_truncate_last_shard_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->truncate, &local->loc, local->offset, local->xattr_req); else STACK_WIND (frame, shard_truncate_last_shard_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->ftruncate, local->fd, local->offset, local->xattr_req); return 0; } local->inode_list = GF_CALLOC (local->num_blocks, sizeof (inode_t *), gf_shard_mt_inode_list); if (!local->inode_list) goto err; local->dot_shard_loc.inode = inode_find (this->itable, priv->dot_shard_gfid); if (!local->dot_shard_loc.inode) { ret = shard_init_dot_shard_loc (this, local); if (ret) goto err; shard_lookup_dot_shard (frame, this, shard_post_resolve_truncate_handler); } else { shard_common_resolve_shards (frame, this, (local->fop == GF_FOP_TRUNCATE) ? local->loc.inode : local->fd->inode, shard_post_resolve_truncate_handler); } return 0; err: if (local->fop == GF_FOP_TRUNCATE) SHARD_STACK_UNWIND (truncate, frame, -1, ENOMEM, NULL, NULL, NULL); else SHARD_STACK_UNWIND (ftruncate, frame, -1, ENOMEM, NULL, NULL, NULL); return 0; } int shard_post_lookup_truncate_handler (call_frame_t *frame, xlator_t *this) { shard_local_t *local = NULL; local = frame->local; if (local->op_ret < 0) { if (local->fop == GF_FOP_TRUNCATE) SHARD_STACK_UNWIND (truncate, frame, local->op_ret, local->op_errno, NULL, NULL, NULL); else SHARD_STACK_UNWIND (ftruncate, frame, local->op_ret, local->op_errno, NULL, NULL, NULL); return 0; } local->postbuf = local->prebuf; if (local->prebuf.ia_size == local->offset) { /* If the file size is same as requested size, unwind the call * immediately. */ if (local->fop == GF_FOP_TRUNCATE) SHARD_STACK_UNWIND (truncate, frame, 0, 0, &local->prebuf, &local->postbuf, NULL); else SHARD_STACK_UNWIND (ftruncate, frame, 0, 0, &local->prebuf, &local->postbuf, NULL); } else if (local->offset > local->prebuf.ia_size) { /* If the truncate is from a lower to a higher size, set the * new size xattr and unwind. */ local->hole_size = local->offset - local->prebuf.ia_size; local->delta_size = 0; local->delta_blocks = 0; local->postbuf.ia_size = local->offset; shard_update_file_size (frame, this, NULL, &local->loc, shard_post_update_size_truncate_handler); } else { /* ... else * i. unlink all shards that need to be unlinked. * ii. truncate the last of the shards. * iii. update the new size using setxattr. * and unwind the fop. */ local->hole_size = 0; local->delta_size = (local->offset - local->prebuf.ia_size); local->delta_blocks = 0; shard_truncate_begin (frame, this); } return 0; } int shard_truncate (call_frame_t *frame, xlator_t *this, loc_t *loc, off_t offset, dict_t *xdata) { int ret = -1; uint64_t block_size = 0; shard_local_t *local = NULL; ret = shard_inode_ctx_get_block_size (loc->inode, this, &block_size); if (ret) { gf_log (this->name, GF_LOG_ERROR, "Failed to get block size " "from inode ctx of %s", uuid_utoa (loc->inode->gfid)); goto err; } if (!block_size) { STACK_WIND (frame, default_truncate_cbk, FIRST_CHILD (this), FIRST_CHILD (this)->fops->truncate, loc, offset, xdata); return 0; } if (!this->itable) this->itable = loc->inode->table; local = mem_get0 (this->local_pool); if (!local) goto err; frame->local = local; loc_copy (&local->loc, loc); local->offset = offset; local->block_size = block_size; local->fop = GF_FOP_TRUNCATE; local->xattr_req = (xdata) ? dict_ref (xdata) : dict_new (); if (!local->xattr_req) goto err; shard_lookup_base_file (frame, this, &local->loc, shard_post_lookup_truncate_handler); return 0; err: SHARD_STACK_UNWIND (truncate, frame, -1, ENOMEM, NULL, NULL, NULL); return 0; } int shard_ftruncate (call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, dict_t *xdata) { int ret = -1; uint64_t block_size = 0; shard_local_t *local = NULL; ret = shard_inode_ctx_get_block_size (fd->inode, this, &block_size); if (ret) { gf_log (this->name, GF_LOG_ERROR, "Failed to get block size " "from inode ctx of %s", uuid_utoa (fd->inode->gfid)); goto err; } if (!block_size) { STACK_WIND (frame, default_ftruncate_cbk, FIRST_CHILD (this), FIRST_CHILD (this)->fops->ftruncate, fd, offset, xdata); return 0; } if (!this->itable) this->itable = fd->inode->table; local = mem_get0 (this->local_pool); if (!local) goto err; frame->local = local; local->fd = fd_ref (fd); local->offset = offset; local->block_size = block_size; local->xattr_req = (xdata) ? dict_ref (xdata) : dict_new (); if (!local->xattr_req) goto err; local->fop = GF_FOP_FTRUNCATE; local->loc.inode = inode_ref (fd->inode); gf_uuid_copy (local->loc.gfid, fd->inode->gfid); shard_lookup_base_file (frame, this, &local->loc, shard_post_lookup_truncate_handler); return 0; err: SHARD_STACK_UNWIND (ftruncate, frame, -1, ENOMEM, NULL, NULL, NULL); return 0; } int shard_mknod_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, inode_t *inode, struct iatt *buf, struct iatt *preparent, struct iatt *postparent, dict_t *xdata) { int ret = -1; shard_local_t *local = NULL; shard_inode_ctx_t ctx_tmp = {0,}; local = frame->local; if (op_ret == -1) goto unwind; ctx_tmp.block_size = ntoh64 (local->block_size); ctx_tmp.mode = st_mode_from_ia (buf->ia_prot, buf->ia_type); ctx_tmp.rdev = buf->ia_rdev; ret = shard_inode_ctx_set_all (inode, this, &ctx_tmp); if (ret) gf_log (this->name, GF_LOG_WARNING, "Failed to set inode ctx " "for %s", uuid_utoa (inode->gfid)); unwind: SHARD_STACK_UNWIND (mknod, frame, op_ret, op_errno, inode, buf, preparent, postparent, xdata); return 0; } int shard_mknod (call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode, dev_t rdev, mode_t umask, dict_t *xdata) { shard_local_t *local = NULL; local = mem_get0 (this->local_pool); if (!local) goto err; frame->local = local; SHARD_INODE_CREATE_INIT (this, local, xdata, loc, err); STACK_WIND (frame, shard_mknod_cbk, FIRST_CHILD (this), FIRST_CHILD(this)->fops->mknod, loc, mode, rdev, umask, xdata); return 0; err: SHARD_STACK_UNWIND (mknod, frame, -1, ENOMEM, NULL, NULL, NULL, NULL, NULL); return 0; } int shard_unlink_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) { SHARD_STACK_UNWIND (unlink, frame, op_ret, op_errno, preparent, postparent, xdata); return 0; } int shard_unlink_base_file (call_frame_t *frame, xlator_t *this) { shard_local_t *local = NULL; local = frame->local; if (local->op_ret < 0) { shard_unlink_cbk (frame, 0, this, local->op_ret, local->op_errno, NULL, NULL, NULL); return 0; } STACK_WIND (frame, shard_unlink_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->unlink, &local->loc, local->xflag, local->xattr_req); return 0; } void shard_unlink_block_inode (shard_local_t *local, int shard_block_num) { char block_bname[256] = {0,}; inode_t *inode = NULL; shard_priv_t *priv = NULL; priv = THIS->private; inode = local->inode_list[shard_block_num - local->first_block]; shard_make_block_bname (shard_block_num, (local->loc.inode)->gfid, block_bname, sizeof (block_bname)); inode_unlink (inode, priv->dot_shard_inode, block_bname); inode_forget (inode, 0); } int shard_rename_cbk (call_frame_t *frame, xlator_t *this); int shard_unlink_shards_do_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) { int call_count = 0; int shard_block_num = (long) cookie; shard_local_t *local = NULL; local = frame->local; if (op_ret < 0) { local->op_ret = op_ret; local->op_errno = op_errno; goto done; } shard_unlink_block_inode (local, shard_block_num); done: call_count = shard_call_count_return (frame); if (call_count == 0) { if (local->fop == GF_FOP_UNLINK) shard_unlink_base_file (frame, this); else if (local->fop == GF_FOP_RENAME) shard_rename_cbk (frame, this); else shard_truncate_last_shard (frame, this, local->inode_list[0]); } return 0; } int shard_unlink_shards_do (call_frame_t *frame, xlator_t *this, inode_t *inode) { int i = 0; int ret = -1; int count = 0; int call_count = 0; uint32_t last_block = 0; uint32_t cur_block = 0; char *bname = NULL; char path[PATH_MAX] = {0,}; loc_t loc = {0,}; gf_boolean_t wind_failed = _gf_false; shard_local_t *local = NULL; shard_priv_t *priv = NULL; priv = this->private; local = frame->local; local->call_count = call_count = local->num_blocks - 1; last_block = local->last_block; for (i = 1; i < local->num_blocks; i++) { if (!local->inode_list[i]) continue; count++; } if (!count) { /* callcount = 0 implies that all of the shards that need to be * unlinked are non-existent (in other words the file is full of * holes). So shard xlator would now proceed to do the final * unlink on the base file. */ local->num_blocks = 1; if (local->fop == GF_FOP_UNLINK) { STACK_WIND (frame, shard_unlink_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->unlink, &local->loc, local->flags, local->xattr_req); } else if (local->fop == GF_FOP_RENAME) { shard_rename_cbk (frame, this); } return 0; } while (cur_block <= last_block) { /* The base file is unlinked in the end to mark the * successful completion of the fop. */ if (cur_block == 0) { cur_block++; continue; } if (wind_failed) { shard_unlink_shards_do_cbk (frame, (void *) (long) cur_block, this, -1, ENOMEM, NULL, NULL, NULL); goto next; } shard_make_block_abspath (cur_block, inode->gfid, path, sizeof (path)); bname = strrchr (path, '/') + 1; loc.parent = inode_ref (priv->dot_shard_inode); ret = inode_path (loc.parent, bname, (char **) &(loc.path)); if (ret < 0) { gf_log (this->name, GF_LOG_ERROR, "Inode path failed " "on %s", bname); local->op_ret = -1; local->op_errno = ENOMEM; loc_wipe (&loc); wind_failed = _gf_true; shard_unlink_shards_do_cbk (frame, (void *) (long) cur_block, this, -1, ENOMEM, NULL, NULL, NULL); goto next; } loc.name = strrchr (loc.path, '/'); if (loc.name) loc.name++; loc.inode = inode_ref (local->inode_list[cur_block]); STACK_WIND_COOKIE (frame, shard_unlink_shards_do_cbk, (void *) (long) cur_block, FIRST_CHILD(this), FIRST_CHILD (this)->fops->unlink, &loc, local->xflag, local->xattr_req); loc_wipe (&loc); next: cur_block++; if (!--call_count) break; } return 0; } int shard_post_lookup_shards_unlink_handler (call_frame_t *frame, xlator_t *this) { shard_local_t *local = NULL; local = frame->local; if ((local->op_ret < 0) && (local->op_errno != ENOENT)) { if (local->fop == GF_FOP_UNLINK) SHARD_STACK_UNWIND (unlink, frame, local->op_ret, local->op_errno, NULL, NULL, NULL); else SHARD_STACK_UNWIND (rename, frame, local->op_ret, local->op_errno, NULL, NULL, NULL, NULL, NULL, NULL); return 0; } local->op_ret = 0; local->op_errno = 0; shard_unlink_shards_do (frame, this, (local->fop == GF_FOP_RENAME) ? local->loc2.inode : local->loc.inode); return 0; } int shard_post_resolve_unlink_handler (call_frame_t *frame, xlator_t *this) { shard_local_t *local = NULL; local = frame->local; if (local->op_ret < 0) { if (local->op_errno == ENOENT) { /* If lookup on /.shard fails with ENOENT, it probably * means that the file is being unlinked before it * could grow beyond its first block. In this case, * unlink boils down to unlinking the base file and * unwinding the call. */ local->op_ret = 0; local->first_block = local->last_block = 0; local->num_blocks = 1; if (local->fop == GF_FOP_UNLINK) STACK_WIND (frame, shard_unlink_cbk, FIRST_CHILD(this), FIRST_CHILD (this)->fops->unlink, &local->loc, local->xflag, local->xattr_req); else shard_rename_cbk (frame, this); return 0; } else { if (local->fop == GF_FOP_UNLINK) SHARD_STACK_UNWIND (unlink, frame, local->op_ret, local->op_errno, NULL, NULL, NULL); else shard_rename_cbk (frame, this); return 0; } } if (!local->call_count) shard_unlink_shards_do (frame, this, (local->fop == GF_FOP_RENAME) ? local->loc2.inode : local->loc.inode); else shard_common_lookup_shards (frame, this, (local->fop == GF_FOP_RENAME) ? local->loc2.inode : local->loc.inode, shard_post_lookup_shards_unlink_handler); return 0; } int shard_post_lookup_unlink_handler (call_frame_t *frame, xlator_t *this) { int ret = -1; shard_priv_t *priv = NULL; shard_local_t *local = NULL; priv = this->private; local = frame->local; if (local->op_ret < 0) { SHARD_STACK_UNWIND (unlink, frame, local->op_ret, local->op_errno, NULL, NULL, NULL); return 0; } local->first_block = get_lowest_block (0, local->block_size); local->last_block = get_highest_block (0, local->prebuf.ia_size, local->block_size); local->num_blocks = local->last_block - local->first_block + 1; if ((local->num_blocks == 1) || (local->prebuf.ia_nlink > 1)) { /* num_blocks = 1 implies that the file has not crossed its * shard block size. So unlink boils down to unlinking just the * base file. * Because link() does not create links for all but the * base shard, unlink() must delete these shards only when the * link count is 1. */ STACK_WIND (frame, shard_unlink_cbk, FIRST_CHILD (this), FIRST_CHILD (this)->fops->unlink, &local->loc, local->xflag, local->xattr_req); return 0; } local->inode_list = GF_CALLOC (local->num_blocks, sizeof (inode_t *), gf_shard_mt_inode_list); if (!local->inode_list) goto out; local->dot_shard_loc.inode = inode_find (this->itable, priv->dot_shard_gfid); if (!local->dot_shard_loc.inode) { ret = shard_init_dot_shard_loc (this, local); if (ret) goto out; shard_lookup_dot_shard (frame, this, shard_post_resolve_unlink_handler); } else { shard_common_resolve_shards (frame, this, local->loc.inode, shard_post_resolve_unlink_handler); } return 0; out: SHARD_STACK_UNWIND (unlink, frame, -1, ENOMEM, NULL, NULL, NULL); return 0; } int shard_unlink (call_frame_t *frame, xlator_t *this, loc_t *loc, int xflag, dict_t *xdata) { int ret = -1; uint64_t block_size = 0; shard_local_t *local = NULL; ret = shard_inode_ctx_get_block_size (loc->inode, this, &block_size); if ((ret) && (!IA_ISLNK(loc->inode->ia_type))) { gf_log (this->name, GF_LOG_ERROR, "Failed to get block size " "from inode ctx of %s", uuid_utoa (loc->inode->gfid)); goto err; } if (!block_size) { STACK_WIND (frame, default_unlink_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->unlink, loc, xflag, xdata); return 0; } local = mem_get0 (this->local_pool); if (!local) goto err; frame->local = local; loc_copy (&local->loc, loc); local->xflag = xflag; local->xattr_req = (xdata) ? dict_ref (xdata) : dict_new (); local->block_size = block_size; local->fop = GF_FOP_UNLINK; if (!this->itable) this->itable = (local->loc.inode)->table; shard_lookup_base_file (frame, this, &local->loc, shard_post_lookup_unlink_handler); return 0; err: SHARD_STACK_UNWIND (unlink, frame, -1, ENOMEM, NULL, NULL, NULL); return 0; } int shard_rename_cbk (call_frame_t *frame, xlator_t *this) { shard_local_t *local = NULL; local = frame->local; SHARD_STACK_UNWIND (rename, frame, local->op_ret, local->op_errno, &local->prebuf, &local->preoldparent, &local->postoldparent, &local->prenewparent, &local->postnewparent, local->xattr_rsp); return 0; } int shard_rename_unlink_dst_shards_do (call_frame_t *frame, xlator_t *this) { int ret = -1; shard_local_t *local = NULL; shard_priv_t *priv = NULL; local = frame->local; priv = this->private; local->first_block = get_lowest_block (0, local->dst_block_size); local->last_block = get_highest_block (0, local->postbuf.ia_size, local->dst_block_size); local->num_blocks = local->last_block - local->first_block + 1; if ((local->num_blocks == 1) || (local->postbuf.ia_nlink > 1)) { shard_rename_cbk (frame, this); return 0; } local->inode_list = GF_CALLOC (local->num_blocks, sizeof (inode_t *), gf_shard_mt_inode_list); if (!local->inode_list) goto out; local->dot_shard_loc.inode = inode_find (this->itable, priv->dot_shard_gfid); if (!local->dot_shard_loc.inode) { ret = shard_init_dot_shard_loc (this, local); if (ret) goto out; shard_lookup_dot_shard (frame, this, shard_post_resolve_unlink_handler); } else { shard_common_resolve_shards (frame, this, local->loc2.inode, shard_post_resolve_unlink_handler); } return 0; out: SHARD_STACK_UNWIND (rename, frame, -1, ENOMEM, NULL, NULL, NULL, NULL, NULL, NULL); return 0; } int shard_post_rename_lookup_handler (call_frame_t *frame, xlator_t *this) { shard_local_t *local = NULL; local = frame->local; if (local->op_ret < 0) { SHARD_STACK_UNWIND (rename, frame, local->op_ret, local->op_errno, NULL, NULL, NULL, NULL, NULL, NULL); return 0; } if (local->dst_block_size) shard_rename_unlink_dst_shards_do (frame, this); else shard_rename_cbk (frame, this); return 0; } int shard_rename_src_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, struct iatt *buf, struct iatt *preoldparent, struct iatt *postoldparent, struct iatt *prenewparent, struct iatt *postnewparent, dict_t *xdata) { shard_local_t *local = NULL; local = frame->local; if (op_ret < 0) { local->op_ret = op_ret; local->op_errno = op_errno; goto err; } local->prebuf = *buf; local->preoldparent = *preoldparent; local->postoldparent = *postoldparent; local->prenewparent = *prenewparent; local->postnewparent = *postnewparent; if (xdata) local->xattr_rsp = dict_ref (xdata); /* Now the base file is looked up to gather the ia_size and ia_blocks.*/ if (local->block_size) { local->tmp_loc.inode = inode_new (this->itable); gf_uuid_copy (local->tmp_loc.gfid, (local->loc.inode)->gfid); shard_lookup_base_file (frame, this, &local->tmp_loc, shard_post_rename_lookup_handler); } else { shard_rename_unlink_dst_shards_do (frame, this); } return 0; err: SHARD_STACK_UNWIND (rename, frame, local->op_ret, local->op_errno, NULL, NULL, NULL, NULL, NULL, NULL); return 0; } int shard_rename_src_base_file (call_frame_t *frame, xlator_t *this) { shard_local_t *local = NULL; local = frame->local; STACK_WIND (frame, shard_rename_src_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->rename, &local->loc, &local->loc2, local->xattr_req); return 0; } int shard_post_lookup_dst_base_file_handler (call_frame_t *frame, xlator_t *this) { shard_local_t *local = NULL; local = frame->local; if (local->op_ret < 0) { SHARD_STACK_UNWIND (rename, frame, local->op_ret, local->op_errno, NULL, NULL, NULL, NULL, NULL, NULL); return 0; } /* Save dst base file attributes into postbuf so the information is not * lost when it is overwritten after lookup on base file of src in * shard_lookup_base_file_cbk(). */ local->postbuf = local->prebuf; shard_rename_src_base_file (frame, this); return 0; } int shard_rename (call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc, dict_t *xdata) { int ret = -1; uint64_t block_size = 0; uint64_t dst_block_size = 0; shard_local_t *local = NULL; if (IA_ISDIR (oldloc->inode->ia_type)) { STACK_WIND (frame, default_rename_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->rename, oldloc, newloc, xdata); return 0; } ret = shard_inode_ctx_get_block_size (oldloc->inode, this, &block_size); if ((ret) && (!IA_ISLNK (oldloc->inode->ia_type))) { gf_log (this->name, GF_LOG_ERROR, "Failed to get block size " "from inode ctx of %s", uuid_utoa (oldloc->inode->gfid)); goto err; } if (newloc->inode) ret = shard_inode_ctx_get_block_size (newloc->inode, this, &dst_block_size); /* The following stack_wind covers the case where: * a. the src file is not sharded and dst doesn't exist, OR * b. the src and dst both exist but are not sharded. */ if ((!block_size) && (!dst_block_size)) { STACK_WIND (frame, default_rename_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->rename, oldloc, newloc, xdata); return 0; } local = mem_get0 (this->local_pool); if (!local) goto err; frame->local = local; loc_copy (&local->loc, oldloc); loc_copy (&local->loc2, newloc); local->fop = GF_FOP_RENAME; local->xattr_req = (xdata) ? dict_ref (xdata) : dict_new(); if (!local->xattr_req) goto err; local->block_size = block_size; local->dst_block_size = dst_block_size; if (!this->itable) this->itable = (local->loc.inode)->table; if (local->dst_block_size) /* The if block covers the case where the dst file exists and is * sharded. So it is important to look up this inode, record its * size, before renaming src to dst, so as to NOT lose this * information. */ shard_lookup_base_file (frame, this, &local->loc2, shard_post_lookup_dst_base_file_handler); else /* The following block covers the case where the dst either * doesn't exist or is NOT sharded. In this case, shard xlator * would go ahead and rename src to dst. */ shard_rename_src_base_file (frame, this); return 0; err: SHARD_STACK_UNWIND (rename, frame, -1, ENOMEM, NULL, NULL, NULL, NULL, NULL, NULL); return 0; } int shard_create_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, fd_t *fd, inode_t *inode, struct iatt *stbuf, struct iatt *preparent, struct iatt *postparent, dict_t *xdata) { int ret = -1; shard_local_t *local = NULL; shard_inode_ctx_t ctx_tmp = {0,}; local = frame->local; if (op_ret == -1) goto unwind; ctx_tmp.block_size = ntoh64 (local->block_size); ctx_tmp.mode = st_mode_from_ia (stbuf->ia_prot, stbuf->ia_type); ctx_tmp.rdev = stbuf->ia_rdev; ret = shard_inode_ctx_set_all (inode, this, &ctx_tmp); if (ret) { gf_log (this->name, GF_LOG_WARNING, "Failed to set block size " "for %s in inode ctx", uuid_utoa (inode->gfid)); goto unwind; } unwind: SHARD_STACK_UNWIND (create, frame, op_ret, op_errno, fd, inode, stbuf, preparent, postparent, xdata); return 0; } int shard_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 *xdata) { shard_local_t *local = NULL; local = mem_get0 (this->local_pool); if (!local) goto err; frame->local = local; SHARD_INODE_CREATE_INIT (this, local, xdata, loc, err); STACK_WIND (frame, shard_create_cbk, FIRST_CHILD (this), FIRST_CHILD(this)->fops->create, loc, flags, mode, umask, fd, xdata); return 0; err: SHARD_STACK_UNWIND (create, frame, -1, ENOMEM, NULL, NULL, NULL, NULL, NULL, NULL); return 0; } int shard_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) { /* To-Do: Handle open with O_TRUNC under locks */ SHARD_STACK_UNWIND (open, frame, op_ret, op_errno, fd, xdata); return 0; } int shard_open (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags, fd_t *fd, dict_t *xdata) { STACK_WIND (frame, shard_open_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->open, loc, flags, fd, xdata); return 0; } int shard_readv_do_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, struct iovec *vector, int32_t count, struct iatt *stbuf, struct iobref *iobref, dict_t *xdata) { int i = 0; int call_count = 0; void *address = NULL; uint64_t block_num = 0; off_t off = 0; struct iovec vec = {0,}; shard_local_t *local = NULL; fd_t *anon_fd = cookie; local = frame->local; if (op_ret < 0) { local->op_ret = op_ret; local->op_errno = op_errno; goto out; } if (local->op_ret >= 0) local->op_ret += op_ret; fd_ctx_get (anon_fd, this, &block_num); if (block_num == local->first_block) { address = local->iobuf->ptr; } else { /* else * address to start writing to = beginning of buffer + * number of bytes until end of first block + * + block_size times number of blocks * between the current block and the first */ address = (char *) local->iobuf->ptr + (local->block_size - (local->offset % local->block_size)) + ((block_num - local->first_block - 1) * local->block_size); } for (i = 0; i < count; i++) { address = (char *) address + off; memcpy (address, vector[i].iov_base, vector[i].iov_len); off += vector[i].iov_len; } out: if (anon_fd) fd_unref (anon_fd); call_count = shard_call_count_return (frame); if (call_count == 0) { if (local->op_ret < 0) { SHARD_STACK_UNWIND (readv, frame, local->op_ret, local->op_errno, NULL, 0, NULL, NULL, NULL); } else { if (xdata) local->xattr_rsp = dict_ref (xdata); vec.iov_base = local->iobuf->ptr; vec.iov_len = local->op_ret; SHARD_STACK_UNWIND (readv, frame, local->op_ret, local->op_errno, &vec, 1, &local->prebuf, local->iobref, local->xattr_rsp); return 0; } } return 0; } int shard_readv_do (call_frame_t *frame, xlator_t *this) { int i = 0; int ret = 0; int call_count = 0; int last_block = 0; int cur_block = 0; off_t orig_offset = 0; off_t shard_offset = 0; size_t read_size = 0; size_t remaining_size = 0; fd_t *fd = NULL; fd_t *anon_fd = NULL; shard_local_t *local = NULL; gf_boolean_t wind_failed = _gf_false; local = frame->local; fd = local->fd; orig_offset = local->offset; cur_block = local->first_block; last_block = local->last_block; remaining_size = local->total_size; local->call_count = call_count = local->num_blocks; while (cur_block <= last_block) { if (wind_failed) { shard_readv_do_cbk (frame, (void *) (long) 0, this, -1, ENOMEM, NULL, 0, NULL, NULL, NULL); goto next; } shard_offset = orig_offset % local->block_size; read_size = local->block_size - shard_offset; if (read_size > remaining_size) read_size = remaining_size; remaining_size -= read_size; if (cur_block == 0) { anon_fd = fd_ref (fd); } else { anon_fd = fd_anonymous (local->inode_list[i]); if (!anon_fd) { local->op_ret = -1; local->op_errno = ENOMEM; wind_failed = _gf_true; shard_readv_do_cbk (frame, (void *) (long) anon_fd, this, -1, ENOMEM, NULL, 0, NULL, NULL, NULL); goto next; } } ret = fd_ctx_set (anon_fd, this, cur_block); if (ret) { gf_log (this->name, GF_LOG_ERROR, "Failed to set fd " "ctx for block %d, gfid=%s", cur_block, uuid_utoa (local->inode_list[i]->gfid)); local->op_ret = -1; local->op_errno = ENOMEM; wind_failed = _gf_true; shard_readv_do_cbk (frame, (void *) (long) anon_fd, this, -1, ENOMEM, NULL, 0, NULL, NULL, NULL); goto next; } STACK_WIND_COOKIE (frame, shard_readv_do_cbk, anon_fd, FIRST_CHILD(this), FIRST_CHILD(this)->fops->readv, anon_fd, read_size, shard_offset, local->flags, local->xattr_req); orig_offset += read_size; next: cur_block++; i++; call_count--; } return 0; } int shard_post_lookup_shards_readv_handler (call_frame_t *frame, xlator_t *this) { shard_local_t *local = NULL; local = frame->local; if (local->op_ret < 0) { SHARD_STACK_UNWIND (readv, frame, local->op_ret, local->op_errno, NULL, 0, NULL, NULL, NULL); return 0; } shard_readv_do (frame, this); return 0; } int shard_post_mknod_readv_handler (call_frame_t *frame, xlator_t *this) { shard_local_t *local = NULL; local = frame->local; if (local->op_ret < 0) { SHARD_STACK_UNWIND (readv, frame, local->op_ret, local->op_errno, NULL, 0, NULL, NULL, NULL); return 0; } if (!local->eexist_count) { shard_readv_do (frame, this); } else { local->call_count = local->eexist_count; shard_common_lookup_shards (frame, this, local->loc.inode, shard_post_lookup_shards_readv_handler); } return 0; } int shard_common_mknod_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, inode_t *inode, struct iatt *buf, struct iatt *preparent, struct iatt *postparent, dict_t *xdata) { int shard_block_num = (long) cookie; int call_count = 0; shard_local_t *local = NULL; local = frame->local; if (op_ret < 0) { if (op_errno == EEXIST) { local->eexist_count++; } else { local->op_ret = op_ret; local->op_errno = op_errno; } gf_log (this->name, GF_LOG_DEBUG, "mknod of shard %d " "failed: %s", shard_block_num, strerror (op_errno)); goto done; } shard_link_block_inode (local, shard_block_num, inode, buf); done: call_count = shard_call_count_return (frame); if (call_count == 0) local->post_mknod_handler (frame, this); return 0; } int shard_common_resume_mknod (call_frame_t *frame, xlator_t *this, shard_post_mknod_fop_handler_t post_mknod_handler) { int i = 0; int shard_idx_iter = 0; int last_block = 0; int ret = 0; int call_count = 0; char path[PATH_MAX] = {0,}; char *bname = NULL; shard_priv_t *priv = NULL; shard_inode_ctx_t ctx_tmp = {0,}; shard_local_t *local = NULL; gf_boolean_t wind_failed = _gf_false; fd_t *fd = NULL; loc_t loc = {0,}; dict_t *xattr_req = NULL; local = frame->local; priv = this->private; fd = local->fd; shard_idx_iter = local->first_block; last_block = local->last_block; call_count = local->call_count; local->post_mknod_handler = post_mknod_handler; ret = shard_inode_ctx_get_all (fd->inode, this, &ctx_tmp); if (ret) { gf_log (this->name, GF_LOG_ERROR, "Failed to get inode ctx for" " %s", uuid_utoa (fd->inode->gfid)); local->op_ret = -1; local->op_errno = ENOMEM; goto err; } while (shard_idx_iter <= last_block) { if (local->inode_list[i]) { shard_idx_iter++; i++; continue; } if (wind_failed) { shard_common_mknod_cbk (frame, (void *) (long) shard_idx_iter, this, -1, ENOMEM, NULL, NULL, NULL, NULL, NULL); goto next; } shard_make_block_abspath (shard_idx_iter, fd->inode->gfid, path, sizeof(path)); xattr_req = shard_create_gfid_dict (local->xattr_req); if (!xattr_req) { local->op_ret = -1; local->op_errno = ENOMEM; wind_failed = _gf_true; shard_common_mknod_cbk (frame, (void *) (long) shard_idx_iter, this, -1, ENOMEM, NULL, NULL, NULL, NULL, NULL); goto next; } bname = strrchr (path, '/') + 1; loc.inode = inode_new (this->itable); loc.parent = inode_ref (priv->dot_shard_inode); ret = inode_path (loc.parent, bname, (char **) &(loc.path)); if (ret < 0 || !(loc.inode)) { gf_log (this->name, GF_LOG_ERROR, "Inode path failed on" " %s", bname); local->op_ret = -1; local->op_errno = ENOMEM; wind_failed = _gf_true; loc_wipe (&loc); dict_unref (xattr_req); shard_common_mknod_cbk (frame, (void *) (long) shard_idx_iter, this, -1, ENOMEM, NULL, NULL, NULL, NULL, NULL); goto next; } loc.name = strrchr (loc.path, '/'); if (loc.name) loc.name++; STACK_WIND_COOKIE (frame, shard_common_mknod_cbk, (void *) (long) shard_idx_iter, FIRST_CHILD(this), FIRST_CHILD(this)->fops->mknod, &loc, ctx_tmp.mode, ctx_tmp.rdev, 0, xattr_req); loc_wipe (&loc); dict_unref (xattr_req); next: shard_idx_iter++; i++; if (!--call_count) break; } return 0; err: /* * This block is for handling failure in shard_inode_ctx_get_all(). * Failures in the while-loop are handled within the loop. */ post_mknod_handler (frame, this); return 0; } int shard_post_resolve_readv_handler (call_frame_t *frame, xlator_t *this) { shard_local_t *local = NULL; local = frame->local; if (local->op_ret < 0) { if (local->op_errno != ENOENT) { SHARD_STACK_UNWIND (readv, frame, local->op_ret, local->op_errno, NULL, 0, NULL, NULL, NULL); return 0; } else { struct iovec vec = {0,}; vec.iov_base = local->iobuf->ptr; vec.iov_len = local->total_size; SHARD_STACK_UNWIND (readv, frame, local->total_size, 0, &vec, 1, &local->prebuf, local->iobref, NULL); return 0; } } if (local->call_count) shard_common_resume_mknod (frame, this, shard_post_mknod_readv_handler); else shard_readv_do (frame, this); return 0; } int shard_post_lookup_readv_handler (call_frame_t *frame, xlator_t *this) { int ret = 0; size_t read_size = 0; size_t actual_size = 0; struct iobuf *iobuf = NULL; shard_local_t *local = NULL; shard_priv_t *priv = NULL; priv = this->private; local = frame->local; if (local->op_ret < 0) { SHARD_STACK_UNWIND (readv, frame, local->op_ret, local->op_errno, NULL, 0, NULL, NULL, NULL); return 0; } if (local->offset >= local->prebuf.ia_size) { /* If the read is being performed past the end of the file, * unwind the FOP with 0 bytes read as status. */ struct iovec vec = {0,}; iobuf = iobuf_get2 (this->ctx->iobuf_pool, local->req_size); if (!iobuf) goto err; vec.iov_base = iobuf->ptr; vec.iov_len = 0; local->iobref = iobref_new (); iobref_add (local->iobref, iobuf); iobuf_unref (iobuf); SHARD_STACK_UNWIND (readv, frame, 0, 0, &vec, 1, &local->prebuf, local->iobref, NULL); return 0; } read_size = (local->offset + local->req_size); actual_size = local->prebuf.ia_size; local->first_block = get_lowest_block (local->offset, local->block_size); /* If the end of read surpasses the file size, only resolve and read * till the end of the file size. If the read is confined within the * size of the file, read only the requested size. */ if (read_size >= actual_size) local->total_size = actual_size - local->offset; else local->total_size = local->req_size; local->last_block = get_highest_block (local->offset, local->total_size, local->block_size); local->num_blocks = local->last_block - local->first_block + 1; local->inode_list = GF_CALLOC (local->num_blocks, sizeof (inode_t *), gf_shard_mt_inode_list); if (!local->inode_list) goto err; iobuf = iobuf_get2 (this->ctx->iobuf_pool, local->total_size); if (!iobuf) goto err; local->iobref = iobref_new (); if (!local->iobref) { iobuf_unref (iobuf); goto err; } if (iobref_add (local->iobref, iobuf) != 0) { iobuf_unref (iobuf); goto err; } iobuf_unref (iobuf); local->iobuf = iobuf; memset (iobuf->ptr, 0, local->total_size); local->dot_shard_loc.inode = inode_find (this->itable, priv->dot_shard_gfid); if (!local->dot_shard_loc.inode) { ret = shard_init_dot_shard_loc (this, local); if (ret) goto err; shard_lookup_dot_shard (frame, this, shard_post_resolve_readv_handler); } else { shard_common_resolve_shards (frame, this, local->loc.inode, shard_post_resolve_readv_handler); } return 0; err: SHARD_STACK_UNWIND (readv, frame, -1, ENOMEM, NULL, 0, NULL, NULL, NULL); return 0; } int shard_readv (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size, off_t offset, uint32_t flags, dict_t *xdata) { int ret = 0; uint64_t block_size = 0; shard_local_t *local = NULL; ret = shard_inode_ctx_get_block_size (fd->inode, this, &block_size); if (ret) { gf_log (this->name, GF_LOG_ERROR, "Failed to get block size for" "%s from its inode ctx", uuid_utoa (fd->inode->gfid)); goto err; } if (!block_size) { /* block_size = 0 means that the file was created before * sharding was enabled on the volume. */ STACK_WIND (frame, default_readv_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->readv, fd, size, offset, flags, xdata); return 0; } if (!this->itable) this->itable = fd->inode->table; local = mem_get0 (this->local_pool); if (!local) goto err; frame->local = local; local->fd = fd_ref (fd); local->block_size = block_size; local->offset = offset; local->req_size = size; local->flags = flags; local->xattr_req = (xdata) ? dict_ref (xdata) : dict_new (); if (!local->xattr_req) goto err; local->loc.inode = inode_ref (fd->inode); gf_uuid_copy (local->loc.gfid, fd->inode->gfid); shard_lookup_base_file (frame, this, &local->loc, shard_post_lookup_readv_handler); return 0; err: SHARD_STACK_UNWIND (readv, frame, -1, ENOMEM, NULL, 0, NULL, NULL, NULL); return 0; } int shard_post_update_size_writev_handler (call_frame_t *frame, xlator_t *this) { shard_local_t *local = NULL; local = frame->local; if (local->op_ret < 0) { SHARD_STACK_UNWIND (writev, frame, local->op_ret, local->op_errno, NULL, NULL, NULL); return 0; } local->postbuf.ia_size += (local->delta_size + local->hole_size); local->postbuf.ia_blocks += local->delta_blocks; SHARD_STACK_UNWIND (writev, frame, local->written_size, local->op_errno, &local->prebuf, &local->postbuf, local->xattr_rsp); return 0; } int shard_writev_do_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; fd_t *anon_fd = cookie; shard_local_t *local = NULL; local = frame->local; if (op_ret < 0) { local->op_ret = op_ret; local->op_errno = op_errno; } else { local->written_size += op_ret; local->delta_blocks += (postbuf->ia_blocks - prebuf->ia_blocks); local->delta_size += (postbuf->ia_size - prebuf->ia_size); } if (anon_fd) fd_unref (anon_fd); call_count = shard_call_count_return (frame); if (call_count == 0) { if (local->op_ret < 0) { SHARD_STACK_UNWIND (writev, frame, local->written_size, local->op_errno, NULL, NULL, NULL); } else { if (xdata) local->xattr_rsp = dict_ref (xdata); shard_update_file_size (frame, this, local->fd, NULL, shard_post_update_size_writev_handler); } } return 0; } int shard_writev_do (call_frame_t *frame, xlator_t *this) { int i = 0; int count = 0; int call_count = 0; int last_block = 0; uint32_t cur_block = 0; fd_t *fd = NULL; fd_t *anon_fd = NULL; shard_local_t *local = NULL; struct iovec *vec = NULL; gf_boolean_t wind_failed = _gf_false; off_t orig_offset = 0; off_t shard_offset = 0; off_t vec_offset = 0; size_t remaining_size = 0; size_t write_size = 0; local = frame->local; fd = local->fd; orig_offset = local->offset; remaining_size = local->total_size; cur_block = local->first_block; local->call_count = call_count = local->num_blocks; last_block = local->last_block; if (dict_set_uint32 (local->xattr_req, GLUSTERFS_WRITE_UPDATE_ATOMIC, 4)) { local->op_ret = -1; local->op_errno = ENOMEM; shard_writev_do_cbk (frame, (void *)(long)0, this, -1, ENOMEM, NULL, NULL, NULL); return 0; } while (cur_block <= last_block) { if (wind_failed) { shard_writev_do_cbk (frame, (void *) (long) 0, this, -1, ENOMEM, NULL, NULL, NULL); goto next; } shard_offset = orig_offset % local->block_size; write_size = local->block_size - shard_offset; if (write_size > remaining_size) write_size = remaining_size; remaining_size -= write_size; count = iov_subset (local->vector, local->count, vec_offset, vec_offset + write_size, NULL); vec = GF_CALLOC (count, sizeof (struct iovec), gf_shard_mt_iovec); if (!vec) { local->op_ret = -1; local->op_errno = ENOMEM; wind_failed = _gf_true; GF_FREE (vec); shard_writev_do_cbk (frame, (void *) (long) 0, this, -1, ENOMEM, NULL, NULL, NULL); goto next; } count = iov_subset (local->vector, local->count, vec_offset, vec_offset + write_size, vec); if (cur_block == 0) { anon_fd = fd_ref (fd); } else { anon_fd = fd_anonymous (local->inode_list[i]); if (!anon_fd) { local->op_ret = -1; local->op_errno = ENOMEM; wind_failed = _gf_true; GF_FREE (vec); shard_writev_do_cbk (frame, (void *) (long) anon_fd, this, -1, ENOMEM, NULL, NULL, NULL); goto next; } } STACK_WIND_COOKIE (frame, shard_writev_do_cbk, anon_fd, FIRST_CHILD(this), FIRST_CHILD(this)->fops->writev, anon_fd, vec, count, shard_offset, local->flags, local->iobref, local->xattr_req); GF_FREE (vec); vec = NULL; orig_offset += write_size; vec_offset += write_size; next: cur_block++; i++; call_count--; } return 0; } int shard_post_lookup_writev_handler (call_frame_t *frame, xlator_t *this) { shard_local_t *local = NULL; local = frame->local; if (local->op_ret < 0) { SHARD_STACK_UNWIND (writev, frame, local->op_ret, local->op_errno, NULL, NULL, NULL); return 0; } local->postbuf = local->prebuf; /* At this point, calculate the size of the hole if it is going to be * created as part of this write. */ if (local->offset > local->prebuf.ia_size) local->hole_size = local->offset - local->prebuf.ia_size; shard_writev_do (frame, this); return 0; } int shard_post_lookup_shards_writev_handler (call_frame_t *frame, xlator_t *this) { shard_local_t *local = NULL; local = frame->local; if (local->op_ret < 0) { SHARD_STACK_UNWIND (writev, frame, local->op_ret, local->op_errno, NULL, NULL, NULL); return 0; } shard_lookup_base_file (frame, this, &local->loc, shard_post_lookup_writev_handler); return 0; } int shard_post_mknod_writev_handler (call_frame_t *frame, xlator_t *this) { shard_local_t *local = NULL; local = frame->local; if (local->op_ret < 0) { SHARD_STACK_UNWIND (writev, frame, local->op_ret, local->op_errno, NULL, NULL, NULL); return 0; } if (!local->eexist_count) { shard_lookup_base_file (frame, this, &local->loc, shard_post_lookup_writev_handler); } else { local->call_count = local->eexist_count; shard_common_lookup_shards (frame, this, local->loc.inode, shard_post_lookup_shards_writev_handler); } return 0; } int shard_post_resolve_writev_handler (call_frame_t *frame, xlator_t *this) { shard_local_t *local = NULL; local = frame->local; if (local->op_ret < 0) { SHARD_STACK_UNWIND (writev, frame, local->op_ret, local->op_errno, NULL, NULL, NULL); return 0; } if (local->call_count) shard_common_resume_mknod (frame, this, shard_post_mknod_writev_handler); else shard_lookup_base_file (frame, this, &local->loc, shard_post_lookup_writev_handler); return 0; } int shard_writev_mkdir_dot_shard_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, inode_t *inode, struct iatt *buf, struct iatt *preparent, struct iatt *postparent, dict_t *xdata) { shard_local_t *local = NULL; local = frame->local; if (op_ret == -1) { if (op_errno != EEXIST) { goto unwind; } else { gf_log (this->name, GF_LOG_DEBUG, "mkdir on /.shard " "failed with EEXIST. Attempting lookup now"); shard_lookup_dot_shard (frame, this, shard_post_resolve_writev_handler); return 0; } } shard_link_dot_shard_inode (local, inode, buf); shard_common_resolve_shards (frame, this, local->loc.inode, shard_post_resolve_writev_handler); return 0; unwind: SHARD_STACK_UNWIND (writev, frame, -1, op_errno, NULL, NULL, NULL); return 0; } int shard_writev_mkdir_dot_shard (call_frame_t *frame, xlator_t *this) { int ret = -1; shard_local_t *local = NULL; shard_priv_t *priv = NULL; dict_t *xattr_req = NULL; local = frame->local; priv = this->private; xattr_req = dict_new (); if (!xattr_req) goto err; ret = shard_init_dot_shard_loc (this, local); if (ret) goto err; ret = dict_set_static_bin (xattr_req, "gfid-req", priv->dot_shard_gfid, 16); if (ret) { gf_log (this->name, GF_LOG_ERROR, "Failed to set gfid-req for " "/.shard"); goto err; } STACK_WIND (frame, shard_writev_mkdir_dot_shard_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->mkdir, &local->dot_shard_loc, 0777, 0, xattr_req); dict_unref (xattr_req); return 0; err: if (xattr_req) dict_unref (xattr_req); SHARD_STACK_UNWIND (writev, frame, -1, ENOMEM, NULL, NULL, NULL); return 0; } int shard_writev (call_frame_t *frame, xlator_t *this, fd_t *fd, struct iovec *vector, int32_t count, off_t offset, uint32_t flags, struct iobref *iobref, dict_t *xdata) { int ret = 0; int i = 0; uint64_t block_size = 0; shard_local_t *local = NULL; shard_priv_t *priv = NULL; priv = this->private; ret = shard_inode_ctx_get_block_size (fd->inode, this, &block_size); if (ret) { gf_log (this->name, GF_LOG_ERROR, "Failed to get block size " "for %s from its inode ctx", uuid_utoa (fd->inode->gfid)); goto out; } if (!block_size) { /* block_size = 0 means that the file was created before * sharding was enabled on the volume. */ STACK_WIND (frame, default_writev_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->writev, fd, vector, count, offset, flags, iobref, xdata); return 0; } if (!this->itable) this->itable = fd->inode->table; local = mem_get0 (this->local_pool); if (!local) goto out; frame->local = local; local->xattr_req = (xdata) ? dict_ref (xdata) : dict_new (); if (!local->xattr_req) goto out; local->vector = iov_dup (vector, count); if (!local->vector) goto out; for (i = 0; i < count; i++) local->total_size += vector[i].iov_len; local->count = count; local->offset = offset; local->flags = flags; local->iobref = iobref_ref (iobref); local->fd = fd_ref (fd); local->block_size = block_size; local->first_block = get_lowest_block (offset, local->block_size); local->last_block = get_highest_block (offset, local->total_size, local->block_size); local->num_blocks = local->last_block - local->first_block + 1; local->inode_list = GF_CALLOC (local->num_blocks, sizeof (inode_t *), gf_shard_mt_inode_list); if (!local->inode_list) goto out; local->loc.inode = inode_ref (fd->inode); gf_uuid_copy (local->loc.gfid, fd->inode->gfid); gf_log (this->name, GF_LOG_TRACE, "gfid=%s first_block=%"PRIu32" " "last_block=%"PRIu32" num_blocks=%"PRIu32" offset=%"PRId64" " "total_size=%lu", uuid_utoa (fd->inode->gfid), local->first_block, local->last_block, local->num_blocks, offset, local->total_size); local->dot_shard_loc.inode = inode_find (this->itable, priv->dot_shard_gfid); if (!local->dot_shard_loc.inode) shard_writev_mkdir_dot_shard (frame, this); else shard_common_resolve_shards (frame, this, local->loc.inode, shard_post_resolve_writev_handler); return 0; out: SHARD_STACK_UNWIND (writev, frame, -1, ENOMEM, NULL, NULL, NULL); return 0; } int shard_flush_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, dict_t *xdata) { /* To-Do: Wind flush on all shards of the file */ SHARD_STACK_UNWIND (flush, frame, op_ret, op_errno, xdata); return 0; } int shard_flush (call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *xdata) { STACK_WIND (frame, shard_flush_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->flush, fd, xdata); return 0; } int shard_fsync_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) { /* To-Do: Wind fsync on all shards of the file */ SHARD_STACK_UNWIND (fsync, frame, op_ret, op_errno, prebuf, postbuf, xdata); return 0; } int shard_fsync (call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t datasync, dict_t *xdata) { STACK_WIND (frame, shard_fsync_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->fsync, fd, datasync, xdata); return 0; } int shard_readdir_past_dot_shard_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, gf_dirent_t *orig_entries, dict_t *xdata) { gf_dirent_t *entry = NULL; gf_dirent_t *tmp = NULL; shard_local_t *local = NULL; local = frame->local; if (op_ret < 0) goto unwind; list_for_each_entry_safe (entry, tmp, (&orig_entries->list), list) { list_del_init (&entry->list); list_add_tail (&entry->list, &local->entries_head.list); if (!entry->dict) continue; if (IA_ISDIR (entry->d_stat.ia_type)) continue; shard_modify_size_and_block_count (&entry->d_stat, entry->dict); } local->op_ret += op_ret; unwind: if (local->fop == GF_FOP_READDIR) SHARD_STACK_UNWIND (readdir, frame, local->op_ret, local->op_errno, &local->entries_head, xdata); else SHARD_STACK_UNWIND (readdirp, frame, op_ret, op_errno, &local->entries_head, xdata); return 0; } int32_t shard_readdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, gf_dirent_t *orig_entries, dict_t *xdata) { fd_t *fd = NULL; gf_dirent_t *entry = NULL; gf_dirent_t *tmp = NULL; shard_local_t *local = NULL; gf_boolean_t last_entry = _gf_false; local = frame->local; fd = local->fd; if (op_ret < 0) goto unwind; list_for_each_entry_safe (entry, tmp, (&orig_entries->list), list) { if (last_entry) last_entry = _gf_false; if (__is_root_gfid (fd->inode->gfid) && !(strcmp (entry->d_name, GF_SHARD_DIR))) { local->offset = entry->d_off; op_ret--; last_entry = _gf_true; continue; } list_del_init (&entry->list); list_add_tail (&entry->list, &local->entries_head.list); if (!entry->dict) continue; if (IA_ISDIR (entry->d_stat.ia_type)) continue; if (dict_get (entry->dict, GF_XATTR_SHARD_FILE_SIZE)) shard_modify_size_and_block_count (&entry->d_stat, entry->dict); } local->op_ret = op_ret; if (last_entry) { if (local->fop == GF_FOP_READDIR) STACK_WIND (frame, shard_readdir_past_dot_shard_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->readdir, local->fd, local->readdir_size, local->offset, local->xattr_req); else STACK_WIND (frame, shard_readdir_past_dot_shard_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->readdirp, local->fd, local->readdir_size, local->offset, local->xattr_req); return 0; } unwind: if (local->fop == GF_FOP_READDIR) SHARD_STACK_UNWIND (readdir, frame, op_ret, op_errno, &local->entries_head, xdata); else SHARD_STACK_UNWIND (readdirp, frame, op_ret, op_errno, &local->entries_head, xdata); return 0; } int shard_readdir_do (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size, off_t offset, int whichop, dict_t *xdata) { shard_local_t *local = NULL; local = mem_get0 (this->local_pool); if (!local) { local->op_ret = -1; local->op_errno = ENOMEM; goto err; } frame->local = local; local->fd = fd_ref (fd); local->fop = whichop; local->readdir_size = size; INIT_LIST_HEAD (&local->entries_head.list); local->list_inited = _gf_true; if (whichop == GF_FOP_READDIR) { STACK_WIND (frame, shard_readdir_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->readdir, fd, size, offset, xdata); } else { local->xattr_req = (xdata) ? dict_ref (xdata) : dict_new (); SHARD_MD_READ_FOP_INIT_REQ_DICT (this, local->xattr_req, fd->inode->gfid, local, err); STACK_WIND (frame, shard_readdir_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->readdirp, fd, size, offset, local->xattr_req); } return 0; err: STACK_UNWIND_STRICT (readdir, frame, local->op_ret, local->op_errno, NULL, NULL); return 0; } int32_t shard_readdir (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size, off_t offset, dict_t *xdata) { shard_readdir_do (frame, this, fd, size, offset, GF_FOP_READDIR, xdata); return 0; } int32_t shard_readdirp (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size, off_t offset, dict_t *xdata) { shard_readdir_do (frame, this, fd, size, offset, GF_FOP_READDIRP, xdata); return 0; } int shard_post_setattr_handler (call_frame_t *frame, xlator_t *this) { shard_local_t *local = NULL; local = frame->local; if (local->fop == GF_FOP_SETATTR) { SHARD_STACK_UNWIND (setattr, frame, local->op_ret, local->op_errno, &local->prebuf, &local->postbuf, local->xattr_rsp); } else if (local->fop == GF_FOP_FSETATTR) { SHARD_STACK_UNWIND (fsetattr, frame, local->op_ret, local->op_errno, &local->prebuf, &local->postbuf, local->xattr_rsp); } return 0; } int shard_common_setattr_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) { shard_local_t *local = NULL; local = frame->local; if (op_ret < 0) { local->op_ret = op_ret; local->op_errno = op_errno; goto unwind; } local->prebuf = *prebuf; if (shard_modify_size_and_block_count (&local->prebuf, xdata)) { local->op_ret = -1; local->op_errno = EINVAL; goto unwind; } if (xdata) local->xattr_rsp = dict_ref (xdata); local->postbuf = *postbuf; local->postbuf.ia_size = local->prebuf.ia_size; local->postbuf.ia_blocks = local->prebuf.ia_blocks; unwind: local->handler (frame, this); return 0; } int shard_setattr (call_frame_t *frame, xlator_t *this, loc_t *loc, struct iatt *stbuf, int32_t valid, dict_t *xdata) { int ret = -1; uint64_t block_size = 0; shard_local_t *local = NULL; if ((IA_ISDIR (loc->inode->ia_type)) || (IA_ISLNK (loc->inode->ia_type))) { STACK_WIND (frame, default_setattr_cbk, FIRST_CHILD (this), FIRST_CHILD (this)->fops->setattr, loc, stbuf, valid, xdata); return 0; } ret = shard_inode_ctx_get_block_size (loc->inode, this, &block_size); if (ret) { gf_log (this->name, GF_LOG_ERROR, "Failed to get block size " "from inode ctx of %s", uuid_utoa (loc->inode->gfid)); goto err; } if (!block_size) { STACK_WIND (frame, default_setattr_cbk, FIRST_CHILD (this), FIRST_CHILD (this)->fops->setattr, loc, stbuf, valid, xdata); return 0; } local = mem_get0 (this->local_pool); if (!local) goto err; frame->local = local; local->handler = shard_post_setattr_handler; local->xattr_req = (xdata) ? dict_ref (xdata) : dict_new (); if (!local->xattr_req) goto err; local->fop = GF_FOP_SETATTR; SHARD_MD_READ_FOP_INIT_REQ_DICT (this, local->xattr_req, local->loc.gfid, local, err); STACK_WIND (frame, shard_common_setattr_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->setattr, loc, stbuf, valid, local->xattr_req); return 0; err: SHARD_STACK_UNWIND (setattr, frame, -1, ENOMEM, NULL, NULL, NULL); return 0; } int shard_fsetattr (call_frame_t *frame, xlator_t *this, fd_t *fd, struct iatt *stbuf, int32_t valid, dict_t *xdata) { int ret = -1; uint64_t block_size = 0; shard_local_t *local = NULL; if ((IA_ISDIR (fd->inode->ia_type)) || (IA_ISLNK (fd->inode->ia_type))) { STACK_WIND (frame, default_fsetattr_cbk, FIRST_CHILD(this), FIRST_CHILD (this)->fops->fsetattr, fd, stbuf, valid, xdata); return 0; } ret = shard_inode_ctx_get_block_size (fd->inode, this, &block_size); if (ret) { gf_log (this->name, GF_LOG_ERROR, "Failed to get block size " "from inode ctx of %s", uuid_utoa (fd->inode->gfid)); goto err; } if (!block_size) { STACK_WIND (frame, default_fsetattr_cbk, FIRST_CHILD (this), FIRST_CHILD (this)->fops->fsetattr, fd, stbuf, valid, xdata); return 0; } if (!this->itable) this->itable = fd->inode->table; local = mem_get0 (this->local_pool); if (!local) goto err; frame->local = local; local->handler = shard_post_setattr_handler; local->xattr_req = (xdata) ? dict_ref (xdata) : dict_new (); if (!local->xattr_req) goto err; local->fop = GF_FOP_FSETATTR; SHARD_MD_READ_FOP_INIT_REQ_DICT (this, local->xattr_req, fd->inode->gfid, local, err); STACK_WIND (frame, shard_common_setattr_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->fsetattr, fd, stbuf, valid, local->xattr_req); return 0; err: SHARD_STACK_UNWIND (fsetattr, frame, -1, ENOMEM, NULL, NULL, NULL); return 0; } int shard_fallocate (call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t keep_size, off_t offset, size_t len, dict_t *xdata) { /* TBD */ SHARD_STACK_UNWIND (fallocate, frame, -1, ENOTCONN, NULL, NULL, NULL); return 0; } int shard_discard (call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, size_t len, dict_t *xdata) { /* TBD */ SHARD_STACK_UNWIND (discard, frame, -1, ENOTCONN, NULL, NULL, NULL); return 0; } int shard_zerofill (call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, off_t len, dict_t *xdata) { /* TBD */ SHARD_STACK_UNWIND (zerofill, frame, -1, ENOTCONN, NULL, NULL, NULL); return 0; } int32_t mem_acct_init (xlator_t *this) { int ret = -1; if (!this) return ret; ret = xlator_mem_acct_init (this, gf_shard_mt_end + 1); if (ret != 0) { gf_log(this->name, GF_LOG_ERROR, "Memory accounting init" "failed"); return ret; } return ret; } int init (xlator_t *this) { int ret = -1; shard_priv_t *priv = NULL; if (!this) { gf_log ("shard", GF_LOG_ERROR, "this is NULL. init() failed"); goto out; } if (!this->parents) { gf_log (this->name, GF_LOG_ERROR, "Dangling volume. " "Check volfile"); goto out; } if (!this->children || this->children->next) { gf_log (this->name, GF_LOG_ERROR, "shard not configured with " "exactly one sub-volume. Check volfile"); goto out; } priv = GF_CALLOC (1, sizeof (shard_priv_t), gf_shard_mt_priv_t); if (!priv) goto out; GF_OPTION_INIT ("shard-block-size", priv->block_size, size_uint64, out); this->local_pool = mem_pool_new (shard_local_t, 128); if (!this->local_pool) { ret = -1; gf_log (this->name, GF_LOG_ERROR, "Failed to allocate locals " "from mempool"); goto out; } gf_uuid_parse (SHARD_ROOT_GFID, priv->dot_shard_gfid); this->private = priv; ret = 0; out: if (ret) { GF_FREE (priv); mem_pool_destroy (this->local_pool); } return ret; } void fini (xlator_t *this) { shard_priv_t *priv = NULL; GF_VALIDATE_OR_GOTO ("shard", this, out); mem_pool_destroy (this->local_pool); this->local_pool = NULL; priv = this->private; if (!priv) goto out; this->private = NULL; GF_FREE (priv); out: return; } int reconfigure (xlator_t *this, dict_t *options) { int ret = -1; shard_priv_t *priv = NULL; priv = this->private; GF_OPTION_RECONF ("shard-block-size", priv->block_size, options, size, out); ret = 0; out: return ret; } int shard_forget (xlator_t *this, inode_t *inode) { uint64_t ctx_uint = 0; shard_inode_ctx_t *ctx = NULL; inode_ctx_del (inode, this, &ctx_uint); if (!ctx_uint) return 0; ctx = (shard_inode_ctx_t *)ctx_uint; /* To-Do: Delete all the shards associated with this inode. */ GF_FREE (ctx); return 0; } int shard_release (xlator_t *this, fd_t *fd) { /* TBD */ return 0; } int shard_priv_dump (xlator_t *this) { /* TBD */ return 0; } int shard_releasedir (xlator_t *this, fd_t *fd) { return 0; } struct xlator_fops fops = { .lookup = shard_lookup, .open = shard_open, .flush = shard_flush, .fsync = shard_fsync, .stat = shard_stat, .fstat = shard_fstat, .readv = shard_readv, .writev = shard_writev, .truncate = shard_truncate, .ftruncate = shard_ftruncate, .setattr = shard_setattr, .fsetattr = shard_fsetattr, .fallocate = shard_fallocate, .discard = shard_discard, .zerofill = shard_zerofill, .readdir = shard_readdir, .readdirp = shard_readdirp, .create = shard_create, .mknod = shard_mknod, .unlink = shard_unlink, .rename = shard_rename, }; struct xlator_cbks cbks = { .forget = shard_forget, .release = shard_release, .releasedir = shard_releasedir, }; struct xlator_dumpops dumpops = { .priv = shard_priv_dump, }; struct volume_options options[] = { { .key = {"shard-block-size"}, .type = GF_OPTION_TYPE_SIZET, .default_value = "4MB", .min = SHARD_MIN_BLOCK_SIZE, .max = SHARD_MAX_BLOCK_SIZE, .description = "The size unit used to break a file into multiple " "chunks", }, { .key = {NULL} }, };