/* 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 "glusterfs.h" #include "xlator.h" #include "libxlator.h" #include "dht-common.h" #include "defaults.h" #include "tier-common.h" #include "tier.h" int dht_link_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, int op_errno, inode_t *inode, struct iatt *stbuf, struct iatt *preparent, struct iatt *postparent, dict_t *xdata); int tier_link_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, int op_errno, inode_t *inode, struct iatt *stbuf, struct iatt *preparent, struct iatt *postparent, dict_t *xdata) { dht_local_t *local = NULL; dht_conf_t *conf = NULL; loc_t *oldloc = NULL; loc_t *newloc = NULL; local = frame->local; conf = this->private; oldloc = &local->loc; newloc = &local->loc2; if (op_ret == -1) { /* No continuation on DHT inode missing errors, as we should * then have a good stbuf that states P2 happened. We would * get inode missing if, the file completed migrated between * the lookup and the link call */ goto out; } if (local->call_cnt != 1) { goto out; } local->call_cnt = 2; /* Do this on the hot tier now */ STACK_WIND (frame, tier_link_cbk, local->cached_subvol, local->cached_subvol->fops->link, oldloc, newloc, xdata); return 0; out: DHT_STRIP_PHASE1_FLAGS (stbuf); DHT_STACK_UNWIND (link, frame, op_ret, op_errno, inode, stbuf, preparent, postparent, NULL); return 0; } int tier_link (call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc, dict_t *xdata) { xlator_t *cached_subvol = NULL; xlator_t *hashed_subvol = NULL; int op_errno = -1; int ret = -1; dht_local_t *local = NULL; dht_conf_t *conf = NULL; VALIDATE_OR_GOTO (frame, err); VALIDATE_OR_GOTO (this, err); VALIDATE_OR_GOTO (oldloc, err); VALIDATE_OR_GOTO (newloc, err); conf = this->private; local = dht_local_init (frame, oldloc, NULL, GF_FOP_LINK); if (!local) { op_errno = ENOMEM; goto err; } local->call_cnt = 1; cached_subvol = local->cached_subvol; if (!cached_subvol) { gf_msg_debug (this->name, 0, "no cached subvolume for path=%s", oldloc->path); op_errno = ENOENT; goto err; } hashed_subvol = TIER_HASHED_SUBVOL; ret = loc_copy (&local->loc2, newloc); if (ret == -1) { op_errno = ENOMEM; goto err; } if (hashed_subvol == cached_subvol) { STACK_WIND (frame, dht_link_cbk, cached_subvol, cached_subvol->fops->link, oldloc, newloc, xdata); return 0; } /* Create hardlinks to both the data file on the hot tier and the linkto file on the cold tier */ gf_uuid_copy (local->gfid, oldloc->inode->gfid); STACK_WIND (frame, tier_link_cbk, hashed_subvol, hashed_subvol->fops->link, oldloc, newloc, xdata); return 0; err: op_errno = (op_errno == -1) ? errno : op_errno; DHT_STACK_UNWIND (link, frame, -1, op_errno, NULL, NULL, NULL, NULL, NULL); return 0; } int tier_create_unlink_stale_linkto_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, int op_errno, struct iatt *preparent, struct iatt *postparent, dict_t *xdata) { dht_local_t *local = NULL; local = frame->local; if (local->params) { dict_del (local->params, GLUSTERFS_INTERNAL_FOP_KEY); } DHT_STACK_UNWIND (create, frame, -1, local->op_errno, NULL, NULL, NULL, NULL, NULL, NULL); return 0; } int tier_create_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, int op_errno, fd_t *fd, inode_t *inode, struct iatt *stbuf, struct iatt *preparent, struct iatt *postparent, dict_t *xdata) { call_frame_t *prev = NULL; int ret = -1; dht_local_t *local = NULL; xlator_t *hashed_subvol = NULL; dht_conf_t *conf = NULL; local = frame->local; conf = this->private; hashed_subvol = TIER_HASHED_SUBVOL; if (!local) { op_ret = -1; op_errno = EINVAL; goto out; } if (op_ret == -1) { if (local->linked == _gf_true && local->xattr_req) { local->op_errno = op_errno; local->op_ret = op_ret; ret = dht_fill_dict_to_avoid_unlink_of_migrating_file (local->xattr_req); if (ret) { gf_msg (this->name, GF_LOG_WARNING, 0, DHT_MSG_DICT_SET_FAILED, "Failed to set dictionary value to " "unlink of migrating file"); goto out; } STACK_WIND (frame, tier_create_unlink_stale_linkto_cbk, hashed_subvol, hashed_subvol->fops->unlink, &local->loc, 0, local->xattr_req); return 0; } goto out; } prev = cookie; if (local->loc.parent) { dht_inode_ctx_time_update (local->loc.parent, this, preparent, 0); dht_inode_ctx_time_update (local->loc.parent, this, postparent, 1); } ret = dht_layout_preset (this, prev->this, inode); if (ret != 0) { gf_msg_debug (this->name, 0, "could not set preset layout for subvol %s", prev->this->name); op_ret = -1; op_errno = EINVAL; goto out; } local->op_errno = op_errno; if (local->linked == _gf_true) { local->stbuf = *stbuf; dht_linkfile_attr_heal (frame, this); } out: if (local->xattr_req) { dict_del (local->xattr_req, TIER_LINKFILE_GFID); } DHT_STRIP_PHASE1_FLAGS (stbuf); DHT_STACK_UNWIND (create, frame, op_ret, op_errno, fd, inode, stbuf, preparent, postparent, xdata); return 0; } int tier_create_linkfile_create_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, inode_t *inode, struct iatt *stbuf, struct iatt *preparent, struct iatt *postparent, dict_t *xdata) { dht_local_t *local = NULL; xlator_t *cached_subvol = NULL; dht_conf_t *conf = NULL; int ret = -1; unsigned char *gfid = NULL; local = frame->local; if (!local) { op_errno = EINVAL; goto err; } if (op_ret == -1) { local->op_errno = op_errno; goto err; } conf = this->private; if (!conf) { local->op_errno = EINVAL; op_errno = EINVAL; goto err; } cached_subvol = TIER_UNHASHED_SUBVOL; if (local->params) { dict_del (local->params, conf->link_xattr_name); dict_del (local->params, GLUSTERFS_INTERNAL_FOP_KEY); } /* * We will delete the linkfile if data file creation fails. * When deleting this stale linkfile, there is a possibility * for a race between this linkfile deletion and a stale * linkfile deletion triggered by another lookup from different * client. * * For eg: * * Client 1 Client 2 * * 1 linkfile created for foo * * 2 data file creation failed * * 3 creating a file with same name * * 4 lookup before creation deleted * the linkfile created by client1 * considering as a stale linkfile. * * 5 New linkfile created for foo * with different gfid. * * 6 Trigger linkfile deletion as * data file creation failed. * * 7 Linkfile deleted which is * created by client2. * * 8 Data file created. * * With this race, we will end up having a file in a non-hashed subvol * without a linkfile in hashed subvol. * * To avoid this, we store the gfid of linkfile created by client, So * If we delete the linkfile , we validate gfid of existing file with * stored value from posix layer. * * Storing this value in local->xattr_req as local->params was also used * to create the data file. During the linkfile deletion we will use * local->xattr_req dictionary. */ if (!local->xattr_req) { local->xattr_req = dict_new (); if (!local->xattr_req) { local->op_errno = ENOMEM; op_errno = ENOMEM; goto err; } } gfid = GF_CALLOC (1, sizeof (uuid_t), gf_common_mt_char); if (!gfid) { local->op_errno = ENOMEM; op_errno = ENOMEM; goto err; } gf_uuid_copy (gfid, stbuf->ia_gfid); ret = dict_set_dynptr (local->xattr_req, TIER_LINKFILE_GFID, gfid, sizeof (uuid_t)); if (ret) { GF_FREE (gfid); gf_msg (this->name, GF_LOG_WARNING, 0, DHT_MSG_DICT_SET_FAILED, "Failed to set dictionary value" " : key = %s", TIER_LINKFILE_GFID); } STACK_WIND (frame, tier_create_cbk, cached_subvol, cached_subvol->fops->create, &local->loc, local->flags, local->mode, local->umask, local->fd, local->params); return 0; err: DHT_STACK_UNWIND (create, frame, -1, op_errno, NULL, NULL, NULL, NULL, NULL, NULL); return 0; } gf_boolean_t tier_is_hot_tier_decommissioned (xlator_t *this) { dht_conf_t *conf = NULL; xlator_t *hot_tier = NULL; int i = 0; conf = this->private; hot_tier = conf->subvolumes[1]; if (conf->decommission_subvols_cnt) { for (i = 0; i < conf->subvolume_cnt; i++) { if (conf->decommissioned_bricks[i] && conf->decommissioned_bricks[i] == hot_tier) return _gf_true; } } return _gf_false; } int tier_create (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags, mode_t mode, mode_t umask, fd_t *fd, dict_t *params) { int op_errno = -1; dht_local_t *local = NULL; dht_conf_t *conf = NULL; xlator_t *hot_subvol = NULL; xlator_t *cold_subvol = NULL; VALIDATE_OR_GOTO (frame, err); VALIDATE_OR_GOTO (this, err); VALIDATE_OR_GOTO (loc, err); conf = this->private; dht_get_du_info (frame, this, loc); local = dht_local_init (frame, loc, fd, GF_FOP_CREATE); if (!local) { op_errno = ENOMEM; goto err; } cold_subvol = TIER_HASHED_SUBVOL; hot_subvol = TIER_UNHASHED_SUBVOL; if (conf->subvolumes[0] != cold_subvol) { hot_subvol = conf->subvolumes[0]; } /* * if hot tier full, write to cold. * Also if hot tier is full, create in cold */ if (dht_is_subvol_filled (this, hot_subvol) || tier_is_hot_tier_decommissioned (this)) { gf_msg_debug (this->name, 0, "creating %s on %s", loc->path, cold_subvol->name); STACK_WIND (frame, tier_create_cbk, cold_subvol, cold_subvol->fops->create, loc, flags, mode, umask, fd, params); } else { local->params = dict_ref (params); local->flags = flags; local->mode = mode; local->umask = umask; local->cached_subvol = hot_subvol; local->hashed_subvol = cold_subvol; gf_msg_debug (this->name, 0, "creating %s on %s (link at %s)", loc->path, hot_subvol->name, cold_subvol->name); dht_linkfile_create (frame, tier_create_linkfile_create_cbk, this, hot_subvol, cold_subvol, loc); goto out; } out: return 0; err: op_errno = (op_errno == -1) ? errno : op_errno; DHT_STACK_UNWIND (create, frame, -1, op_errno, NULL, NULL, NULL, NULL, NULL, NULL); return 0; } int tier_unlink_nonhashed_linkfile_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, int op_errno, struct iatt *preparent, struct iatt *postparent, dict_t *xdata) { dht_local_t *local = NULL; call_frame_t *prev = NULL; local = frame->local; prev = cookie; LOCK (&frame->lock); { if ((op_ret == -1) && (op_errno != ENOENT)) { local->op_errno = op_errno; local->op_ret = op_ret; gf_msg_debug (this->name, op_errno, "Unlink link: subvolume %s" " returned -1", prev->this->name); goto unlock; } local->op_ret = 0; } unlock: UNLOCK (&frame->lock); if (local->op_ret == -1) goto err; DHT_STACK_UNWIND (unlink, frame, local->op_ret, local->op_errno, &local->preparent, &local->postparent, NULL); return 0; err: DHT_STACK_UNWIND (unlink, frame, -1, local->op_errno, NULL, NULL, NULL); return 0; } int tier_unlink_lookup_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, int op_errno, inode_t *inode, struct iatt *preparent, dict_t *xdata, struct iatt *postparent) { dht_local_t *local = NULL; call_frame_t *prev = NULL; dht_conf_t *conf = NULL; xlator_t *hot_subvol = NULL; local = frame->local; prev = cookie; conf = this->private; hot_subvol = TIER_UNHASHED_SUBVOL; if (!op_ret) { /* * linkfile present on hot tier. unlinking the linkfile */ STACK_WIND (frame, tier_unlink_nonhashed_linkfile_cbk, hot_subvol, hot_subvol->fops->unlink, &local->loc, local->flags, NULL); return 0; } LOCK (&frame->lock); { if (op_errno == ENOENT) { local->op_ret = 0; local->op_errno = op_errno; } else { local->op_ret = op_ret; local->op_errno = op_errno; } gf_msg_debug (this->name, op_errno, "Lookup : subvolume %s returned -1", prev->this->name); } UNLOCK (&frame->lock); DHT_STACK_UNWIND (unlink, frame, local->op_ret, local->op_errno, &local->preparent, &local->postparent, xdata); return 0; } int tier_unlink_linkfile_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, int op_errno, struct iatt *preparent, struct iatt *postparent, dict_t *xdata) { dht_local_t *local = NULL; call_frame_t *prev = NULL; local = frame->local; prev = cookie; LOCK (&frame->lock); { /* Ignore EINVAL for tier to ignore error when the file does not exist on the other tier */ if ((op_ret == -1) && !((op_errno == ENOENT) || (op_errno == EINVAL))) { local->op_errno = op_errno; local->op_ret = op_ret; gf_msg_debug (this->name, op_errno, "Unlink link: subvolume %s" " returned -1", prev->this->name); goto unlock; } local->op_ret = 0; } unlock: UNLOCK (&frame->lock); if (local->op_ret == -1) goto err; DHT_STACK_UNWIND (unlink, frame, local->op_ret, local->op_errno, &local->preparent, &local->postparent, xdata); return 0; err: DHT_STACK_UNWIND (unlink, frame, -1, local->op_errno, NULL, NULL, NULL); return 0; } int32_t tier_unlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, int op_errno, struct iatt *preparent, struct iatt *postparent, dict_t *xdata) { dht_local_t *local = NULL; call_frame_t *prev = NULL; struct iatt *stbuf = NULL; dht_conf_t *conf = NULL; int ret = -1; xlator_t *hot_tier = NULL; xlator_t *cold_tier = NULL; local = frame->local; prev = cookie; conf = this->private; cold_tier = TIER_HASHED_SUBVOL; hot_tier = TIER_UNHASHED_SUBVOL; LOCK (&frame->lock); { if (op_ret == -1) { if (op_errno == ENOENT) { local->op_ret = 0; } else { local->op_ret = -1; local->op_errno = op_errno; } gf_msg_debug (this->name, op_errno, "Unlink: subvolume %s returned -1" " with errno = %d", prev->this->name, op_errno); goto unlock; } local->op_ret = 0; local->postparent = *postparent; local->preparent = *preparent; if (local->loc.parent) { dht_inode_ctx_time_update (local->loc.parent, this, &local->preparent, 0); dht_inode_ctx_time_update (local->loc.parent, this, &local->postparent, 1); } } unlock: UNLOCK (&frame->lock); if (local->op_ret) goto out; if (cold_tier != local->cached_subvol) { /* * File is present in hot tier, so there will be * a link file on cold tier, deleting the linkfile * from cold tier */ STACK_WIND (frame, tier_unlink_linkfile_cbk, cold_tier, cold_tier->fops->unlink, &local->loc, local->flags, xdata); return 0; } ret = dict_get_bin (xdata, DHT_IATT_IN_XDATA_KEY, (void **) &stbuf); if (!ret && stbuf && ((IS_DHT_MIGRATION_PHASE2 (stbuf)) || IS_DHT_MIGRATION_PHASE1 (stbuf))) { /* * File is migrating from cold to hot tier. * Delete the destination linkfile. */ STACK_WIND (frame, tier_unlink_lookup_cbk, hot_tier, hot_tier->fops->lookup, &local->loc, NULL); return 0; } out: DHT_STACK_UNWIND (unlink, frame, local->op_ret, local->op_errno, &local->preparent, &local->postparent, xdata); return 0; } int tier_unlink (call_frame_t *frame, xlator_t *this, loc_t *loc, int xflag, dict_t *xdata) { xlator_t *cached_subvol = NULL; xlator_t *hashed_subvol = NULL; dht_conf_t *conf = NULL; int op_errno = -1; dht_local_t *local = NULL; int ret = -1; VALIDATE_OR_GOTO (frame, err); VALIDATE_OR_GOTO (this, err); VALIDATE_OR_GOTO (loc, err); conf = this->private; local = dht_local_init (frame, loc, NULL, GF_FOP_UNLINK); if (!local) { op_errno = ENOMEM; goto err; } hashed_subvol = TIER_HASHED_SUBVOL; cached_subvol = local->cached_subvol; if (!cached_subvol) { gf_msg_debug (this->name, 0, "no cached subvolume for path=%s", loc->path); op_errno = EINVAL; goto err; } local->flags = xflag; if (IA_ISREG (loc->inode->ia_type) && (hashed_subvol == cached_subvol)) { /* * File resides in cold tier. We need to stat * the file to see if it is being promoted. * If yes we need to delete the destination * file as well. * * Currently we are doing this check only for * regular files. */ xdata = xdata ? dict_ref (xdata) : dict_new (); if (xdata) { ret = dict_set_dynstr_with_alloc (xdata, DHT_IATT_IN_XDATA_KEY, "yes"); if (ret) { gf_msg_debug (this->name, 0, "Failed to set dictionary key %s", DHT_IATT_IN_XDATA_KEY); } } } /* * File is on hot tier, delete the data file first, then * linkfile from cold. */ STACK_WIND (frame, tier_unlink_cbk, cached_subvol, cached_subvol->fops->unlink, loc, xflag, xdata); if (xdata) dict_unref (xdata); return 0; err: op_errno = (op_errno == -1) ? errno : op_errno; DHT_STACK_UNWIND (unlink, frame, -1, op_errno, NULL, NULL, NULL); return 0; } int tier_readdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, int op_errno, gf_dirent_t *orig_entries, dict_t *xdata) { dht_local_t *local = NULL; gf_dirent_t entries; gf_dirent_t *orig_entry = NULL; gf_dirent_t *entry = NULL; call_frame_t *prev = NULL; xlator_t *next_subvol = NULL; off_t next_offset = 0; int count = 0; INIT_LIST_HEAD (&entries.list); prev = cookie; local = frame->local; if (op_ret < 0) goto done; list_for_each_entry (orig_entry, (&orig_entries->list), list) { next_offset = orig_entry->d_off; entry = gf_dirent_for_name (orig_entry->d_name); if (!entry) { gf_msg (this->name, GF_LOG_ERROR, ENOMEM, DHT_MSG_NO_MEMORY, "Memory allocation failed "); goto unwind; } entry->d_off = orig_entry->d_off; entry->d_ino = orig_entry->d_ino; entry->d_type = orig_entry->d_type; entry->d_len = orig_entry->d_len; list_add_tail (&entry->list, &entries.list); count++; } op_ret = count; done: if (count == 0) { /* non-zero next_offset means that EOF is not yet hit on the current subvol */ if (next_offset != 0) { next_subvol = prev->this; } else { goto unwind; } STACK_WIND (frame, tier_readdir_cbk, next_subvol, next_subvol->fops->readdir, local->fd, local->size, next_offset, NULL); return 0; } unwind: if (op_ret < 0) op_ret = 0; DHT_STACK_UNWIND (readdir, frame, op_ret, op_errno, &entries, NULL); gf_dirent_free (&entries); return 0; } int tier_readdirp_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, int op_errno, gf_dirent_t *orig_entries, dict_t *xdata) { dht_local_t *local = NULL; gf_dirent_t entries; gf_dirent_t *orig_entry = NULL; gf_dirent_t *entry = NULL; call_frame_t *prev = NULL; xlator_t *next_subvol = NULL; off_t next_offset = 0; int count = 0; dht_conf_t *conf = NULL; int ret = 0; inode_table_t *itable = NULL; inode_t *inode = NULL; INIT_LIST_HEAD (&entries.list); prev = cookie; local = frame->local; itable = local->fd ? local->fd->inode->table : NULL; conf = this->private; GF_VALIDATE_OR_GOTO(this->name, conf, unwind); if (op_ret < 0) goto done; list_for_each_entry (orig_entry, (&orig_entries->list), list) { next_offset = orig_entry->d_off; if (IA_ISINVAL(orig_entry->d_stat.ia_type)) { /*stat failed somewhere- ignore this entry*/ continue; } entry = gf_dirent_for_name (orig_entry->d_name); if (!entry) { goto unwind; } entry->d_off = orig_entry->d_off; entry->d_stat = orig_entry->d_stat; entry->d_ino = orig_entry->d_ino; entry->d_type = orig_entry->d_type; entry->d_len = orig_entry->d_len; if (orig_entry->dict) entry->dict = dict_ref (orig_entry->dict); if (check_is_linkfile (NULL, (&orig_entry->d_stat), orig_entry->dict, conf->link_xattr_name)) { inode = inode_find (itable, orig_entry->d_stat.ia_gfid); if (inode) { ret = dht_layout_preset (this, TIER_UNHASHED_SUBVOL, inode); if (ret) gf_msg (this->name, GF_LOG_WARNING, 0, DHT_MSG_LAYOUT_SET_FAILED, "failed to link the layout" " in inode"); inode_unref (inode); inode = NULL; } } else if (IA_ISDIR(entry->d_stat.ia_type)) { if (orig_entry->inode) { dht_inode_ctx_time_update (orig_entry->inode, this, &entry->d_stat, 1); } } else { if (orig_entry->inode) { ret = dht_layout_preset (this, prev->this, orig_entry->inode); if (ret) gf_msg (this->name, GF_LOG_WARNING, 0, DHT_MSG_LAYOUT_SET_FAILED, "failed to link the layout " "in inode"); entry->inode = inode_ref (orig_entry->inode); } else if (itable) { /* * orig_entry->inode might be null if any upper * layer xlators below client set to null, to * force a lookup on the inode even if the inode * is present in the inode table. In that case * we just update the ctx to make sure we didn't * missed anything. */ inode = inode_find (itable, orig_entry->d_stat.ia_gfid); if (inode) { ret = dht_layout_preset (this, TIER_HASHED_SUBVOL, inode); if (ret) gf_msg (this->name, GF_LOG_WARNING, 0, DHT_MSG_LAYOUT_SET_FAILED, "failed to link the layout" " in inode"); inode_unref (inode); inode = NULL; } } } list_add_tail (&entry->list, &entries.list); count++; } op_ret = count; done: if (count == 0) { /* non-zero next_offset means that EOF is not yet hit on the current subvol */ if (next_offset != 0) { next_subvol = prev->this; } else { goto unwind; } STACK_WIND (frame, tier_readdirp_cbk, next_subvol, next_subvol->fops->readdirp, local->fd, local->size, next_offset, local->xattr); return 0; } unwind: if (op_ret < 0) op_ret = 0; DHT_STACK_UNWIND (readdirp, frame, op_ret, op_errno, &entries, NULL); gf_dirent_free (&entries); return 0; } int tier_do_readdir (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size, off_t yoff, int whichop, dict_t *dict) { dht_local_t *local = NULL; int op_errno = -1; xlator_t *hashed_subvol = NULL; int ret = 0; dht_conf_t *conf = NULL; VALIDATE_OR_GOTO (frame, err); VALIDATE_OR_GOTO (this, err); VALIDATE_OR_GOTO (fd, err); VALIDATE_OR_GOTO (this->private, err); conf = this->private; local = dht_local_init (frame, NULL, NULL, whichop); if (!local) { op_errno = ENOMEM; goto err; } local->fd = fd_ref (fd); local->size = size; local->xattr_req = (dict) ? dict_ref (dict) : NULL; hashed_subvol = TIER_HASHED_SUBVOL; /* TODO: do proper readdir */ if (whichop == GF_FOP_READDIRP) { if (dict) local->xattr = dict_ref (dict); else local->xattr = dict_new (); if (local->xattr) { ret = dict_set_uint32 (local->xattr, conf->link_xattr_name, 256); if (ret) gf_msg (this->name, GF_LOG_WARNING, 0, DHT_MSG_DICT_SET_FAILED, "Failed to set dictionary value" " : key = %s", conf->link_xattr_name); } STACK_WIND (frame, tier_readdirp_cbk, hashed_subvol, hashed_subvol->fops->readdirp, fd, size, yoff, local->xattr); } else { STACK_WIND (frame, tier_readdir_cbk, hashed_subvol, hashed_subvol->fops->readdir, fd, size, yoff, local->xattr); } return 0; err: op_errno = (op_errno == -1) ? errno : op_errno; DHT_STACK_UNWIND (readdir, frame, -1, op_errno, NULL, NULL); return 0; } int tier_readdir (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size, off_t yoff, dict_t *xdata) { int op = GF_FOP_READDIR; dht_conf_t *conf = NULL; int i = 0; conf = this->private; if (!conf) goto out; for (i = 0; i < conf->subvolume_cnt; i++) { if (!conf->subvolume_status[i]) { op = GF_FOP_READDIRP; break; } } if (conf->use_readdirp) op = GF_FOP_READDIRP; out: tier_do_readdir (frame, this, fd, size, yoff, op, 0); return 0; } int tier_readdirp (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size, off_t yoff, dict_t *dict) { tier_do_readdir (frame, this, fd, size, yoff, GF_FOP_READDIRP, dict); return 0; }