/* * GPL HEADER START * * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 only, * as published by the Free Software Foundation. * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License version 2 for more details. A copy is * included in the COPYING file that accompanied this code. * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * GPL HEADER END */ /* * Copyright (c) 2013, 2017, Intel Corporation. */ /* * lustre/lfsck/lfsck_namespace.c * * Author: Fan, Yong */ #define DEBUG_SUBSYSTEM S_LFSCK #include #include #include #include #include #include #include "lfsck_internal.h" #define LFSCK_NAMESPACE_MAGIC_V1 0xA0629D03 #define LFSCK_NAMESPACE_MAGIC_V2 0xA0621A0B #define LFSCK_NAMESPACE_MAGIC_V3 0xA06249FF /* For Lustre-2.x (x <= 6), the namespace LFSCK used LFSCK_NAMESPACE_MAGIC_V1 * as the trace file magic. When downgrade to such old release, the old LFSCK * will not recognize the new LFSCK_NAMESPACE_MAGIC_V2 in the new trace file, * then it will reset the whole LFSCK, and will not cause start failure. The * similar case will happen when upgrade from such old release. */ #define LFSCK_NAMESPACE_MAGIC LFSCK_NAMESPACE_MAGIC_V3 enum lfsck_nameentry_check { LFSCK_NAMEENTRY_DEAD = 1, /* The object has been unlinked. */ LFSCK_NAMEENTRY_REMOVED = 2, /* The entry has been removed. */ LFSCK_NAMEENTRY_RECREATED = 3, /* The entry has been recreated. */ }; static struct lfsck_namespace_req * lfsck_namespace_assistant_req_init(struct lfsck_instance *lfsck, struct lfsck_assistant_object *lso, struct lu_dirent *ent, __u16 type) { struct lfsck_namespace_req *lnr; int size; size = sizeof(*lnr) + (ent->lde_namelen & ~3) + 4; OBD_ALLOC(lnr, size); if (lnr == NULL) return ERR_PTR(-ENOMEM); INIT_LIST_HEAD(&lnr->lnr_lar.lar_list); lnr->lnr_lar.lar_parent = lfsck_assistant_object_get(lso); lnr->lnr_lmv = lfsck_lmv_get(lfsck->li_lmv); lnr->lnr_fid = ent->lde_fid; lnr->lnr_dir_cookie = ent->lde_hash; lnr->lnr_attr = ent->lde_attrs; lnr->lnr_size = size; lnr->lnr_type = type; lnr->lnr_namelen = ent->lde_namelen; memcpy(lnr->lnr_name, ent->lde_name, ent->lde_namelen); return lnr; } static void lfsck_namespace_assistant_req_fini(const struct lu_env *env, struct lfsck_assistant_req *lar) { struct lfsck_namespace_req *lnr = container_of(lar, struct lfsck_namespace_req, lnr_lar); if (lnr->lnr_lmv != NULL) lfsck_lmv_put(env, lnr->lnr_lmv); lfsck_assistant_object_put(env, lar->lar_parent); OBD_FREE(lnr, lnr->lnr_size); } static void lfsck_namespace_le_to_cpu(struct lfsck_namespace *dst, struct lfsck_namespace *src) { dst->ln_magic = le32_to_cpu(src->ln_magic); dst->ln_status = le32_to_cpu(src->ln_status); dst->ln_flags = le32_to_cpu(src->ln_flags); dst->ln_success_count = le32_to_cpu(src->ln_success_count); dst->ln_run_time_phase1 = le64_to_cpu(src->ln_run_time_phase1); dst->ln_run_time_phase2 = le64_to_cpu(src->ln_run_time_phase2); dst->ln_time_last_complete = le64_to_cpu(src->ln_time_last_complete); dst->ln_time_latest_start = le64_to_cpu(src->ln_time_latest_start); dst->ln_time_last_checkpoint = le64_to_cpu(src->ln_time_last_checkpoint); lfsck_position_le_to_cpu(&dst->ln_pos_latest_start, &src->ln_pos_latest_start); lfsck_position_le_to_cpu(&dst->ln_pos_last_checkpoint, &src->ln_pos_last_checkpoint); lfsck_position_le_to_cpu(&dst->ln_pos_first_inconsistent, &src->ln_pos_first_inconsistent); dst->ln_items_checked = le64_to_cpu(src->ln_items_checked); dst->ln_items_repaired = le64_to_cpu(src->ln_items_repaired); dst->ln_items_failed = le64_to_cpu(src->ln_items_failed); dst->ln_dirs_checked = le64_to_cpu(src->ln_dirs_checked); dst->ln_objs_checked_phase2 = le64_to_cpu(src->ln_objs_checked_phase2); dst->ln_objs_repaired_phase2 = le64_to_cpu(src->ln_objs_repaired_phase2); dst->ln_objs_failed_phase2 = le64_to_cpu(src->ln_objs_failed_phase2); dst->ln_objs_nlink_repaired = le64_to_cpu(src->ln_objs_nlink_repaired); fid_le_to_cpu(&dst->ln_fid_latest_scanned_phase2, &src->ln_fid_latest_scanned_phase2); dst->ln_dirent_repaired = le64_to_cpu(src->ln_dirent_repaired); dst->ln_linkea_repaired = le64_to_cpu(src->ln_linkea_repaired); dst->ln_mul_linked_checked = le64_to_cpu(src->ln_mul_linked_checked); dst->ln_mul_linked_repaired = le64_to_cpu(src->ln_mul_linked_repaired); dst->ln_unknown_inconsistency = le64_to_cpu(src->ln_unknown_inconsistency); dst->ln_unmatched_pairs_repaired = le64_to_cpu(src->ln_unmatched_pairs_repaired); dst->ln_dangling_repaired = le64_to_cpu(src->ln_dangling_repaired); dst->ln_mul_ref_repaired = le64_to_cpu(src->ln_mul_ref_repaired); dst->ln_bad_type_repaired = le64_to_cpu(src->ln_bad_type_repaired); dst->ln_lost_dirent_repaired = le64_to_cpu(src->ln_lost_dirent_repaired); dst->ln_striped_dirs_scanned = le64_to_cpu(src->ln_striped_dirs_scanned); dst->ln_striped_dirs_repaired = le64_to_cpu(src->ln_striped_dirs_repaired); dst->ln_striped_dirs_failed = le64_to_cpu(src->ln_striped_dirs_failed); dst->ln_striped_dirs_disabled = le64_to_cpu(src->ln_striped_dirs_disabled); dst->ln_striped_dirs_skipped = le64_to_cpu(src->ln_striped_dirs_skipped); dst->ln_striped_shards_scanned = le64_to_cpu(src->ln_striped_shards_scanned); dst->ln_striped_shards_repaired = le64_to_cpu(src->ln_striped_shards_repaired); dst->ln_striped_shards_failed = le64_to_cpu(src->ln_striped_shards_failed); dst->ln_striped_shards_skipped = le64_to_cpu(src->ln_striped_shards_skipped); dst->ln_name_hash_repaired = le64_to_cpu(src->ln_name_hash_repaired); dst->ln_local_lpf_scanned = le64_to_cpu(src->ln_local_lpf_scanned); dst->ln_local_lpf_moved = le64_to_cpu(src->ln_local_lpf_moved); dst->ln_local_lpf_skipped = le64_to_cpu(src->ln_local_lpf_skipped); dst->ln_local_lpf_failed = le64_to_cpu(src->ln_local_lpf_failed); dst->ln_bitmap_size = le32_to_cpu(src->ln_bitmap_size); dst->ln_time_latest_reset = le64_to_cpu(src->ln_time_latest_reset); dst->ln_linkea_overflow_cleared = le64_to_cpu(src->ln_linkea_overflow_cleared); dst->ln_agent_entries_repaired = le64_to_cpu(src->ln_agent_entries_repaired); } static void lfsck_namespace_cpu_to_le(struct lfsck_namespace *dst, struct lfsck_namespace *src) { dst->ln_magic = cpu_to_le32(src->ln_magic); dst->ln_status = cpu_to_le32(src->ln_status); dst->ln_flags = cpu_to_le32(src->ln_flags); dst->ln_success_count = cpu_to_le32(src->ln_success_count); dst->ln_run_time_phase1 = cpu_to_le64(src->ln_run_time_phase1); dst->ln_run_time_phase2 = cpu_to_le64(src->ln_run_time_phase2); dst->ln_time_last_complete = cpu_to_le64(src->ln_time_last_complete); dst->ln_time_latest_start = cpu_to_le64(src->ln_time_latest_start); dst->ln_time_last_checkpoint = cpu_to_le64(src->ln_time_last_checkpoint); lfsck_position_cpu_to_le(&dst->ln_pos_latest_start, &src->ln_pos_latest_start); lfsck_position_cpu_to_le(&dst->ln_pos_last_checkpoint, &src->ln_pos_last_checkpoint); lfsck_position_cpu_to_le(&dst->ln_pos_first_inconsistent, &src->ln_pos_first_inconsistent); dst->ln_items_checked = cpu_to_le64(src->ln_items_checked); dst->ln_items_repaired = cpu_to_le64(src->ln_items_repaired); dst->ln_items_failed = cpu_to_le64(src->ln_items_failed); dst->ln_dirs_checked = cpu_to_le64(src->ln_dirs_checked); dst->ln_objs_checked_phase2 = cpu_to_le64(src->ln_objs_checked_phase2); dst->ln_objs_repaired_phase2 = cpu_to_le64(src->ln_objs_repaired_phase2); dst->ln_objs_failed_phase2 = cpu_to_le64(src->ln_objs_failed_phase2); dst->ln_objs_nlink_repaired = cpu_to_le64(src->ln_objs_nlink_repaired); fid_cpu_to_le(&dst->ln_fid_latest_scanned_phase2, &src->ln_fid_latest_scanned_phase2); dst->ln_dirent_repaired = cpu_to_le64(src->ln_dirent_repaired); dst->ln_linkea_repaired = cpu_to_le64(src->ln_linkea_repaired); dst->ln_mul_linked_checked = cpu_to_le64(src->ln_mul_linked_checked); dst->ln_mul_linked_repaired = cpu_to_le64(src->ln_mul_linked_repaired); dst->ln_unknown_inconsistency = cpu_to_le64(src->ln_unknown_inconsistency); dst->ln_unmatched_pairs_repaired = cpu_to_le64(src->ln_unmatched_pairs_repaired); dst->ln_dangling_repaired = cpu_to_le64(src->ln_dangling_repaired); dst->ln_mul_ref_repaired = cpu_to_le64(src->ln_mul_ref_repaired); dst->ln_bad_type_repaired = cpu_to_le64(src->ln_bad_type_repaired); dst->ln_lost_dirent_repaired = cpu_to_le64(src->ln_lost_dirent_repaired); dst->ln_striped_dirs_scanned = cpu_to_le64(src->ln_striped_dirs_scanned); dst->ln_striped_dirs_repaired = cpu_to_le64(src->ln_striped_dirs_repaired); dst->ln_striped_dirs_failed = cpu_to_le64(src->ln_striped_dirs_failed); dst->ln_striped_dirs_disabled = cpu_to_le64(src->ln_striped_dirs_disabled); dst->ln_striped_dirs_skipped = cpu_to_le64(src->ln_striped_dirs_skipped); dst->ln_striped_shards_scanned = cpu_to_le64(src->ln_striped_shards_scanned); dst->ln_striped_shards_repaired = cpu_to_le64(src->ln_striped_shards_repaired); dst->ln_striped_shards_failed = cpu_to_le64(src->ln_striped_shards_failed); dst->ln_striped_shards_skipped = cpu_to_le64(src->ln_striped_shards_skipped); dst->ln_name_hash_repaired = cpu_to_le64(src->ln_name_hash_repaired); dst->ln_local_lpf_scanned = cpu_to_le64(src->ln_local_lpf_scanned); dst->ln_local_lpf_moved = cpu_to_le64(src->ln_local_lpf_moved); dst->ln_local_lpf_skipped = cpu_to_le64(src->ln_local_lpf_skipped); dst->ln_local_lpf_failed = cpu_to_le64(src->ln_local_lpf_failed); dst->ln_bitmap_size = cpu_to_le32(src->ln_bitmap_size); dst->ln_time_latest_reset = cpu_to_le64(src->ln_time_latest_reset); dst->ln_linkea_overflow_cleared = cpu_to_le64(src->ln_linkea_overflow_cleared); dst->ln_agent_entries_repaired = cpu_to_le64(src->ln_agent_entries_repaired); } static void lfsck_namespace_record_failure(const struct lu_env *env, struct lfsck_instance *lfsck, struct lfsck_namespace *ns) { struct lfsck_position pos; ns->ln_items_failed++; lfsck_pos_fill(env, lfsck, &pos, false); if (lfsck_pos_is_zero(&ns->ln_pos_first_inconsistent) || lfsck_pos_is_eq(&pos, &ns->ln_pos_first_inconsistent) < 0) { ns->ln_pos_first_inconsistent = pos; CDEBUG(D_LFSCK, "%s: namespace LFSCK hit first non-repaired " "inconsistency at the pos [%llu, "DFID", %#llx]\n", lfsck_lfsck2name(lfsck), ns->ln_pos_first_inconsistent.lp_oit_cookie, PFID(&ns->ln_pos_first_inconsistent.lp_dir_parent), ns->ln_pos_first_inconsistent.lp_dir_cookie); } } /** * Load the MDT bitmap from the lfsck_namespace trace file. * * \param[in] env pointer to the thread context * \param[in] com pointer to the lfsck component * * \retval 0 for success * \retval negative error number on failure or data corruption */ static int lfsck_namespace_load_bitmap(const struct lu_env *env, struct lfsck_component *com) { struct dt_object *obj = com->lc_obj; struct lfsck_assistant_data *lad = com->lc_data; struct lfsck_namespace *ns = com->lc_file_ram; struct cfs_bitmap *bitmap = lad->lad_bitmap; ssize_t size; __u32 nbits; int rc; ENTRY; if (com->lc_lfsck->li_mdt_descs.ltd_tgts_bitmap->size > ns->ln_bitmap_size) nbits = com->lc_lfsck->li_mdt_descs.ltd_tgts_bitmap->size; else nbits = ns->ln_bitmap_size; if (unlikely(nbits < BITS_PER_LONG)) nbits = BITS_PER_LONG; if (nbits > bitmap->size) { __u32 new_bits = bitmap->size; struct cfs_bitmap *new_bitmap; while (new_bits < nbits) new_bits <<= 1; new_bitmap = CFS_ALLOCATE_BITMAP(new_bits); if (new_bitmap == NULL) RETURN(-ENOMEM); lad->lad_bitmap = new_bitmap; CFS_FREE_BITMAP(bitmap); bitmap = new_bitmap; } if (ns->ln_bitmap_size == 0) { clear_bit(LAD_INCOMPLETE, &lad->lad_flags); CFS_RESET_BITMAP(bitmap); RETURN(0); } size = (ns->ln_bitmap_size + 7) >> 3; rc = dt_xattr_get(env, obj, lfsck_buf_get(env, bitmap->data, size), XATTR_NAME_LFSCK_BITMAP); if (rc != size) RETURN(rc >= 0 ? -EINVAL : rc); if (cfs_bitmap_check_empty(bitmap)) clear_bit(LAD_INCOMPLETE, &lad->lad_flags); else set_bit(LAD_INCOMPLETE, &lad->lad_flags); RETURN(0); } /** * Load namespace LFSCK statistics information from the trace file. * * \param[in] env pointer to the thread context * \param[in] com pointer to the lfsck component * * \retval 0 for success * \retval negative error number on failure */ static int lfsck_namespace_load(const struct lu_env *env, struct lfsck_component *com) { int len = com->lc_file_size; int rc; rc = dt_xattr_get(env, com->lc_obj, lfsck_buf_get(env, com->lc_file_disk, len), XATTR_NAME_LFSCK_NAMESPACE); if (rc == len) { struct lfsck_namespace *ns = com->lc_file_ram; lfsck_namespace_le_to_cpu(ns, (struct lfsck_namespace *)com->lc_file_disk); if (ns->ln_magic != LFSCK_NAMESPACE_MAGIC) { CDEBUG(D_LFSCK, "%s: invalid lfsck_namespace magic " "%#x != %#x\n", lfsck_lfsck2name(com->lc_lfsck), ns->ln_magic, LFSCK_NAMESPACE_MAGIC); rc = -ESTALE; } else { rc = 0; } } else if (rc != -ENODATA) { CDEBUG(D_LFSCK, "%s: fail to load lfsck_namespace, " "expected = %d: rc = %d\n", lfsck_lfsck2name(com->lc_lfsck), len, rc); if (rc >= 0) rc = -ESTALE; } return rc; } static int lfsck_namespace_store(const struct lu_env *env, struct lfsck_component *com) { struct dt_object *obj = com->lc_obj; struct lfsck_instance *lfsck = com->lc_lfsck; struct lfsck_namespace *ns = com->lc_file_ram; struct lfsck_assistant_data *lad = com->lc_data; struct dt_device *dev = lfsck_obj2dev(obj); struct cfs_bitmap *bitmap = NULL; struct thandle *handle; __u32 nbits = 0; int len = com->lc_file_size; int rc; ENTRY; if (lad != NULL) { bitmap = lad->lad_bitmap; nbits = bitmap->size; LASSERT(nbits > 0); LASSERTF((nbits & 7) == 0, "Invalid nbits %u\n", nbits); } ns->ln_bitmap_size = nbits; lfsck_namespace_cpu_to_le((struct lfsck_namespace *)com->lc_file_disk, ns); handle = dt_trans_create(env, dev); if (IS_ERR(handle)) GOTO(log, rc = PTR_ERR(handle)); rc = dt_declare_xattr_set(env, obj, lfsck_buf_get(env, com->lc_file_disk, len), XATTR_NAME_LFSCK_NAMESPACE, 0, handle); if (rc != 0) GOTO(out, rc); if (bitmap != NULL) { rc = dt_declare_xattr_set(env, obj, lfsck_buf_get(env, bitmap->data, nbits >> 3), XATTR_NAME_LFSCK_BITMAP, 0, handle); if (rc != 0) GOTO(out, rc); } rc = dt_trans_start_local(env, dev, handle); if (rc != 0) GOTO(out, rc); rc = dt_xattr_set(env, obj, lfsck_buf_get(env, com->lc_file_disk, len), XATTR_NAME_LFSCK_NAMESPACE, 0, handle); if (rc == 0 && bitmap != NULL) rc = dt_xattr_set(env, obj, lfsck_buf_get(env, bitmap->data, nbits >> 3), XATTR_NAME_LFSCK_BITMAP, 0, handle); GOTO(out, rc); out: dt_trans_stop(env, dev, handle); log: if (rc != 0) CDEBUG(D_LFSCK, "%s: fail to store lfsck_namespace: rc = %d\n", lfsck_lfsck2name(lfsck), rc); return rc; } static int lfsck_namespace_init(const struct lu_env *env, struct lfsck_component *com) { struct lfsck_namespace *ns = com->lc_file_ram; int rc; memset(ns, 0, sizeof(*ns)); ns->ln_magic = LFSCK_NAMESPACE_MAGIC; ns->ln_status = LS_INIT; ns->ln_time_latest_reset = ktime_get_real_seconds(); down_write(&com->lc_sem); rc = lfsck_namespace_store(env, com); if (rc == 0) rc = lfsck_load_sub_trace_files(env, com, &dt_lfsck_namespace_features, LFSCK_NAMESPACE, true); up_write(&com->lc_sem); return rc; } /** * Update the namespace LFSCK trace file for the given @fid * * \param[in] env pointer to the thread context * \param[in] com pointer to the lfsck component * \param[in] fid the fid which flags to be updated in the lfsck * trace file * \param[in] add true if add new flags, otherwise remove flags * * \retval 0 for success or nothing to be done * \retval negative error number on failure */ int lfsck_namespace_trace_update(const struct lu_env *env, struct lfsck_component *com, const struct lu_fid *fid, const __u8 flags, bool add) { struct lfsck_instance *lfsck = com->lc_lfsck; struct dt_object *obj; struct lu_fid *key = &lfsck_env_info(env)->lti_fid3; struct dt_device *dev; struct thandle *th = NULL; int idx; int rc = 0; __u8 old = 0; __u8 new = 0; ENTRY; LASSERT(flags != 0); if (unlikely(!fid_is_sane(fid))) RETURN(0); idx = lfsck_sub_trace_file_fid2idx(fid); mutex_lock(&com->lc_sub_trace_objs[idx].lsto_mutex); obj = com->lc_sub_trace_objs[idx].lsto_obj; if (unlikely(obj == NULL)) { mutex_unlock(&com->lc_sub_trace_objs[idx].lsto_mutex); RETURN(0); } lfsck_object_get(obj); dev = lfsck_obj2dev(obj); fid_cpu_to_be(key, fid); rc = dt_lookup(env, obj, (struct dt_rec *)&old, (const struct dt_key *)key); if (rc == -ENOENT) { if (!add) GOTO(unlock, rc = 0); old = 0; new = flags; } else if (rc == 0) { if (add) { if ((old & flags) == flags) GOTO(unlock, rc = 0); new = old | flags; } else { if ((old & flags) == 0) GOTO(unlock, rc = 0); new = old & ~flags; } } else { GOTO(log, rc); } th = dt_trans_create(env, dev); if (IS_ERR(th)) GOTO(log, rc = PTR_ERR(th)); if (old != 0) { rc = dt_declare_delete(env, obj, (const struct dt_key *)key, th); if (rc != 0) GOTO(log, rc); } if (new != 0) { rc = dt_declare_insert(env, obj, (const struct dt_rec *)&new, (const struct dt_key *)key, th); if (rc != 0) GOTO(log, rc); } rc = dt_trans_start_local(env, dev, th); if (rc != 0) GOTO(log, rc); if (old != 0) { rc = dt_delete(env, obj, (const struct dt_key *)key, th); if (rc != 0) GOTO(log, rc); } if (new != 0) { rc = dt_insert(env, obj, (const struct dt_rec *)&new, (const struct dt_key *)key, th); if (rc != 0) GOTO(log, rc); } GOTO(log, rc); log: if (th != NULL && !IS_ERR(th)) dt_trans_stop(env, dev, th); CDEBUG(D_LFSCK, "%s: namespace LFSCK %s flags for "DFID" in the " "trace file, flags %x, old %x, new %x: rc = %d\n", lfsck_lfsck2name(lfsck), add ? "add" : "del", PFID(fid), (__u32)flags, (__u32)old, (__u32)new, rc); unlock: mutex_unlock(&com->lc_sub_trace_objs[idx].lsto_mutex); lfsck_object_put(env, obj); return rc; } int lfsck_namespace_check_exist(const struct lu_env *env, struct dt_object *dir, struct dt_object *obj, const char *name) { struct lu_fid *fid = &lfsck_env_info(env)->lti_fid; int rc; ENTRY; if (unlikely(lfsck_is_dead_obj(obj))) RETURN(LFSCK_NAMEENTRY_DEAD); rc = dt_lookup_dir(env, dir, name, fid); if (rc == -ENOENT) RETURN(LFSCK_NAMEENTRY_REMOVED); if (rc < 0) RETURN(rc); if (!lu_fid_eq(fid, lfsck_dto2fid(obj))) RETURN(LFSCK_NAMEENTRY_RECREATED); RETURN(0); } static int lfsck_declare_namespace_exec_dir(const struct lu_env *env, struct dt_object *obj, struct thandle *handle) { int rc; /* For remote updating LINKEA, there may be further LFSCK action * on remote MDT after the updating, so update the LINKEA ASAP. */ if (dt_object_remote(obj)) handle->th_sync = 1; /* For destroying all invalid linkEA entries. */ rc = dt_declare_xattr_del(env, obj, XATTR_NAME_LINK, handle); if (rc == 0) /* For insert new linkEA entry. */ rc = dt_declare_xattr_set(env, obj, lfsck_buf_get_const(env, NULL, MAX_LINKEA_SIZE), XATTR_NAME_LINK, 0, handle); return rc; } int __lfsck_links_read(const struct lu_env *env, struct dt_object *obj, struct linkea_data *ldata, bool with_rec) { int rc; if (ldata->ld_buf->lb_buf == NULL) return -ENOMEM; if (!dt_object_exists(obj)) return -ENOENT; rc = dt_xattr_get(env, obj, ldata->ld_buf, XATTR_NAME_LINK); if (rc == -ERANGE) { /* Buf was too small, figure out what we need. */ rc = dt_xattr_get(env, obj, &LU_BUF_NULL, XATTR_NAME_LINK); if (unlikely(rc == 0)) return -ENODATA; if (rc < 0) return rc; lu_buf_realloc(ldata->ld_buf, rc); if (ldata->ld_buf->lb_buf == NULL) return -ENOMEM; rc = dt_xattr_get(env, obj, ldata->ld_buf, XATTR_NAME_LINK); } if (unlikely(rc == 0)) return -ENODATA; if (rc > 0) { if (with_rec) rc = linkea_init_with_rec(ldata); else rc = linkea_init(ldata); } return rc; } /** * Remove linkEA for the given object. * * The caller should take the ldlm lock before the calling. * * \param[in] env pointer to the thread context * \param[in] com pointer to the lfsck component * \param[in] obj pointer to the dt_object to be handled * * \retval 0 for repaired cases * \retval negative error number on failure */ static int lfsck_namespace_links_remove(const struct lu_env *env, struct lfsck_component *com, struct dt_object *obj) { struct lfsck_instance *lfsck = com->lc_lfsck; struct dt_device *dev = lfsck_obj2dev(obj); struct thandle *th = NULL; int rc = 0; ENTRY; LASSERT(dt_object_remote(obj) == 0); th = dt_trans_create(env, dev); if (IS_ERR(th)) GOTO(log, rc = PTR_ERR(th)); rc = dt_declare_xattr_del(env, obj, XATTR_NAME_LINK, th); if (rc != 0) GOTO(stop, rc); rc = dt_trans_start_local(env, dev, th); if (rc != 0) GOTO(stop, rc); dt_write_lock(env, obj, 0); if (unlikely(lfsck_is_dead_obj(obj))) GOTO(unlock, rc = -ENOENT); if (lfsck->li_bookmark_ram.lb_param & LPF_DRYRUN) GOTO(unlock, rc = 0); rc = dt_xattr_del(env, obj, XATTR_NAME_LINK, th); GOTO(unlock, rc); unlock: dt_write_unlock(env, obj); stop: dt_trans_stop(env, dev, th); log: CDEBUG(D_LFSCK, "%s: namespace LFSCK remove invalid linkEA " "for the object "DFID": rc = %d\n", lfsck_lfsck2name(lfsck), PFID(lfsck_dto2fid(obj)), rc); if (rc == 0) { struct lfsck_namespace *ns = com->lc_file_ram; ns->ln_flags |= LF_INCONSISTENT; } return rc; } static int lfsck_links_write(const struct lu_env *env, struct dt_object *obj, struct linkea_data *ldata, struct thandle *handle) { struct lu_buf buf; int rc; lfsck_buf_init(&buf, ldata->ld_buf->lb_buf, ldata->ld_leh->leh_len); again: rc = dt_xattr_set(env, obj, &buf, XATTR_NAME_LINK, 0, handle); if (unlikely(rc == -ENOSPC)) { rc = linkea_overflow_shrink(ldata); if (likely(rc > 0)) { buf.lb_len = rc; goto again; } } return rc; } static inline bool linkea_reclen_is_valid(const struct linkea_data *ldata) { if (ldata->ld_reclen <= 0) return false; if ((char *)ldata->ld_lee + ldata->ld_reclen > (char *)ldata->ld_leh + ldata->ld_leh->leh_len) return false; return true; } static inline bool linkea_entry_is_valid(const struct linkea_data *ldata, const struct lu_name *cname, const struct lu_fid *pfid) { if (!linkea_reclen_is_valid(ldata)) return false; if (cname->ln_namelen <= 0 || cname->ln_namelen > NAME_MAX) return false; if (!fid_is_sane(pfid)) return false; return true; } static int lfsck_namespace_unpack_linkea_entry(struct linkea_data *ldata, struct lu_name *cname, struct lu_fid *pfid, char *buf, const int buflen) { linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, cname, pfid); if (unlikely(!linkea_entry_is_valid(ldata, cname, pfid))) return -EINVAL; /* To guarantee the 'name' is terminated with '0'. */ memcpy(buf, cname->ln_name, cname->ln_namelen); buf[cname->ln_namelen] = 0; cname->ln_name = buf; return 0; } static void lfsck_linkea_del_buf(struct linkea_data *ldata, const struct lu_name *lname) { LASSERT(ldata->ld_leh != NULL && ldata->ld_lee != NULL); /* If current record is corrupted, all the subsequent * records will be dropped. */ if (unlikely(!linkea_reclen_is_valid(ldata))) { void *ptr = ldata->ld_lee; ldata->ld_leh->leh_len = sizeof(struct link_ea_header); ldata->ld_leh->leh_reccount = 0; linkea_first_entry(ldata); while (ldata->ld_lee != NULL && (char *)ldata->ld_lee < (char *)ptr) { int reclen = (ldata->ld_lee->lee_reclen[0] << 8) | ldata->ld_lee->lee_reclen[1]; ldata->ld_leh->leh_len += reclen; ldata->ld_leh->leh_reccount++; ldata->ld_lee = (struct link_ea_entry *) ((char *)ldata->ld_lee + reclen); } ldata->ld_lee = NULL; } else { linkea_del_buf(ldata, lname, false); } } static int lfsck_namespace_filter_linkea_entry(struct linkea_data *ldata, struct lu_name *cname, struct lu_fid *pfid, bool remove) { struct link_ea_entry *oldlee; int oldlen; int repeated = 0; oldlee = ldata->ld_lee; oldlen = ldata->ld_reclen; linkea_next_entry(ldata); while (ldata->ld_lee != NULL) { ldata->ld_reclen = (ldata->ld_lee->lee_reclen[0] << 8) | ldata->ld_lee->lee_reclen[1]; if (unlikely(!linkea_reclen_is_valid(ldata))) { lfsck_linkea_del_buf(ldata, NULL); LASSERT(ldata->ld_lee == NULL); } else if (unlikely(ldata->ld_reclen == oldlen && memcmp(ldata->ld_lee, oldlee, oldlen) == 0)) { repeated++; if (!remove) break; lfsck_linkea_del_buf(ldata, cname); } else { linkea_next_entry(ldata); } } ldata->ld_lee = oldlee; ldata->ld_reclen = oldlen; return repeated; } /** * Insert orphan into .lustre/lost+found/MDTxxxx/ locally. * * Add the specified orphan MDT-object to the .lustre/lost+found/MDTxxxx/ * with the given type to generate the name, the detailed rules for name * have been described as following. * * The function also generates the linkEA corresponding to the name entry * under the .lustre/lost+found/MDTxxxx/ for the orphan MDT-object. * * \param[in] env pointer to the thread context * \param[in] com pointer to the lfsck component * \param[in] orphan pointer to the orphan MDT-object * \param[in] infix additional information for the orphan name, such as * the FID for original * \param[in] type the type for describing why the orphan MDT-object is * created. The rules are as following: * * type "D": The MDT-object is a directory, it may knows its parent * but because there is no valid linkEA, the LFSCK cannot * know where to put it back to the namespace. * type "O": The MDT-object has no linkEA, and there is no name * entry that references the MDT-object. * * type "S": The orphan MDT-object is a shard of a striped directory * * \see lfsck_layout_recreate_parent() for more types. * * The orphan name will be like: * ${FID}-${infix}-${type}-${conflict_version} * * \param[out] count if some others inserted some linkEA entries by race, * then return the linkEA entries count. * * \retval positive number for repaired cases * \retval 0 if needs to repair nothing * \retval negative error number on failure */ static int lfsck_namespace_insert_orphan(const struct lu_env *env, struct lfsck_component *com, struct dt_object *orphan, const char *infix, const char *type, int *count) { struct lfsck_thread_info *info = lfsck_env_info(env); struct lu_name *cname = &info->lti_name; struct dt_insert_rec *rec = &info->lti_dt_rec; struct lu_attr *la = &info->lti_la2; const struct lu_fid *cfid = lfsck_dto2fid(orphan); const struct lu_fid *pfid; struct lu_fid tfid; struct lfsck_instance *lfsck = com->lc_lfsck; struct dt_device *dev = lfsck_obj2dev(orphan); struct dt_object *parent; struct thandle *th = NULL; struct lfsck_lock_handle *pllh = &info->lti_llh; struct lustre_handle clh = { 0 }; struct linkea_data ldata2 = { NULL }; struct lu_buf linkea_buf; int namelen; int idx = 0; int rc = 0; bool exist = false; ENTRY; cname->ln_name = NULL; if (unlikely(lfsck->li_lpf_obj == NULL)) GOTO(log, rc = -ENXIO); parent = lfsck->li_lpf_obj; pfid = lfsck_dto2fid(parent); again: do { namelen = snprintf(info->lti_key, NAME_MAX, DFID"%s-%s-%d", PFID(cfid), infix, type, idx++); rc = dt_lookup_dir(env, parent, info->lti_key, &tfid); if (rc != 0 && rc != -ENOENT) GOTO(log, rc); if (unlikely(rc == 0 && lu_fid_eq(cfid, &tfid))) exist = true; } while (rc == 0 && !exist); rc = lfsck_lock(env, lfsck, parent, info->lti_key, pllh, MDS_INODELOCK_UPDATE, LCK_PW); if (rc != 0) GOTO(log, rc); /* Re-check whether the name conflict with othrs after taken * the ldlm lock. */ rc = dt_lookup_dir(env, parent, info->lti_key, &tfid); if (rc == 0) { if (!lu_fid_eq(cfid, &tfid)) { exist = false; lfsck_unlock(pllh); goto again; } exist = true; } else if (rc != -ENOENT) { GOTO(log, rc); } else { exist = false; } cname->ln_name = info->lti_key; cname->ln_namelen = namelen; rc = linkea_links_new(&ldata2, &info->lti_linkea_buf2, cname, pfid); if (rc != 0) GOTO(log, rc); rc = lfsck_ibits_lock(env, lfsck, orphan, &clh, MDS_INODELOCK_UPDATE | MDS_INODELOCK_LOOKUP | MDS_INODELOCK_XATTR, LCK_EX); if (rc != 0) GOTO(log, rc); lfsck_buf_init(&linkea_buf, ldata2.ld_buf->lb_buf, ldata2.ld_leh->leh_len); th = dt_trans_create(env, dev); if (IS_ERR(th)) GOTO(log, rc = PTR_ERR(th)); if (S_ISDIR(lfsck_object_type(orphan))) { rc = dt_declare_delete(env, orphan, (const struct dt_key *)dotdot, th); if (rc != 0) GOTO(stop, rc); rec->rec_type = S_IFDIR; rec->rec_fid = pfid; rc = dt_declare_insert(env, orphan, (const struct dt_rec *)rec, (const struct dt_key *)dotdot, th); if (rc != 0) GOTO(stop, rc); } rc = dt_declare_xattr_set(env, orphan, &linkea_buf, XATTR_NAME_LINK, 0, th); if (rc != 0) GOTO(stop, rc); if (!exist) { rec->rec_type = lfsck_object_type(orphan) & S_IFMT; rec->rec_fid = cfid; rc = dt_declare_insert(env, parent, (const struct dt_rec *)rec, (const struct dt_key *)cname->ln_name, th); if (rc != 0) GOTO(stop, rc); if (S_ISDIR(rec->rec_type)) { rc = dt_declare_ref_add(env, parent, th); if (rc != 0) GOTO(stop, rc); } } memset(la, 0, sizeof(*la)); la->la_ctime = ktime_get_real_seconds(); la->la_valid = LA_CTIME; rc = dt_declare_attr_set(env, orphan, la, th); if (rc != 0) GOTO(stop, rc); rc = dt_trans_start_local(env, dev, th); if (rc != 0) GOTO(stop, rc); dt_write_lock(env, orphan, 0); rc = lfsck_links_read2_with_rec(env, orphan, &ldata2); if (likely(rc == -ENODATA || rc == -EINVAL)) { if (lfsck->li_bookmark_ram.lb_param & LPF_DRYRUN) GOTO(unlock, rc = 1); if (S_ISDIR(lfsck_object_type(orphan))) { rc = dt_delete(env, orphan, (const struct dt_key *)dotdot, th); if (rc != 0) GOTO(unlock, rc); rec->rec_type = S_IFDIR; rec->rec_fid = pfid; rc = dt_insert(env, orphan, (const struct dt_rec *)rec, (const struct dt_key *)dotdot, th); if (rc != 0) GOTO(unlock, rc); } rc = dt_xattr_set(env, orphan, &linkea_buf, XATTR_NAME_LINK, 0, th); } else { if (rc == 0 && count != NULL) *count = ldata2.ld_leh->leh_reccount; GOTO(unlock, rc); } dt_write_unlock(env, orphan); if (rc == 0 && !exist) { rec->rec_type = lfsck_object_type(orphan) & S_IFMT; rec->rec_fid = cfid; rc = dt_insert(env, parent, (const struct dt_rec *)rec, (const struct dt_key *)cname->ln_name, th); if (rc == 0 && S_ISDIR(rec->rec_type)) { dt_write_lock(env, parent, 0); rc = dt_ref_add(env, parent, th); dt_write_unlock(env, parent); } } if (rc == 0) rc = dt_attr_set(env, orphan, la, th); GOTO(stop, rc = (rc == 0 ? 1 : rc)); unlock: dt_write_unlock(env, orphan); stop: dt_trans_stop(env, dev, th); log: lfsck_ibits_unlock(&clh, LCK_EX); lfsck_unlock(pllh); CDEBUG(D_LFSCK, "%s: namespace LFSCK insert orphan for the " "object "DFID", name = %s: rc = %d\n", lfsck_lfsck2name(lfsck), PFID(cfid), cname->ln_name != NULL ? cname->ln_name : "", rc); if (rc != 0) { struct lfsck_namespace *ns = com->lc_file_ram; ns->ln_flags |= LF_INCONSISTENT; } return rc; } static int lfsck_lmv_set(const struct lu_env *env, struct lfsck_instance *lfsck, struct dt_object *obj, struct lmv_mds_md_v1 *lmv) { struct dt_device *dev = lfsck->li_next; struct thandle *th = NULL; struct lu_buf buf = { lmv, sizeof(*lmv) }; int rc; ENTRY; th = dt_trans_create(env, dev); if (IS_ERR(th)) RETURN(PTR_ERR(th)); rc = dt_declare_xattr_set(env, obj, &buf, XATTR_NAME_LMV, 0, th); if (rc) GOTO(stop, rc); rc = dt_trans_start_local(env, dev, th); if (rc != 0) GOTO(stop, rc); rc = dt_xattr_set(env, obj, &buf, XATTR_NAME_LMV, 0, th); if (rc) GOTO(stop, rc); EXIT; stop: dt_trans_stop(env, dev, th); return rc; } static int lfsck_lmv_delete(const struct lu_env *env, struct lfsck_instance *lfsck, struct dt_object *obj) { struct dt_device *dev = lfsck->li_next; struct thandle *th = NULL; int rc; ENTRY; th = dt_trans_create(env, dev); if (IS_ERR(th)) RETURN(PTR_ERR(th)); rc = dt_declare_xattr_del(env, obj, XATTR_NAME_LMV, th); if (rc) GOTO(stop, rc); rc = dt_trans_start_local(env, dev, th); if (rc != 0) GOTO(stop, rc); rc = dt_xattr_del(env, obj, XATTR_NAME_LMV, th); if (rc) GOTO(stop, rc); EXIT; stop: dt_trans_stop(env, dev, th); return rc; } static inline int lfsck_object_is_shard(const struct lu_env *env, struct lfsck_instance *lfsck, struct dt_object *obj, const struct lu_name *lname) { struct lfsck_thread_info *info = lfsck_env_info(env); struct lmv_mds_md_v1 *lmv = &info->lti_lmv; int rc; rc = lfsck_shard_name_to_index(env, lname->ln_name, lname->ln_namelen, lfsck_object_type(obj), lfsck_dto2fid(obj)); if (rc < 0) return 0; rc = lfsck_read_stripe_lmv(env, lfsck, obj, lmv); if (rc == -ENODATA) return 0; if (!rc && lmv->lmv_magic == LMV_MAGIC_STRIPE) return 1; return rc; } /** * Add the specified name entry back to namespace. * * If there is a linkEA entry that back references a name entry under * some parent directory, but such parent directory does not have the * claimed name entry. On the other hand, the linkEA entries count is * not larger than the MDT-object's hard link count. Under such case, * it is quite possible that the name entry is lost. Then the LFSCK * should add the name entry back to the namespace. * * If \a child is shard, which means \a parent is a striped directory, * if \a parent has LMV, we need to delete it before insertion because * now parent's striping is broken and can't be parsed correctly. * * \param[in] env pointer to the thread context * \param[in] com pointer to the lfsck component * \param[in] parent pointer to the directory under which the name entry * will be inserted into * \param[in] child pointer to the object referenced by the name entry * that to be inserted into the parent * \param[in] lname the name for the child in the parent directory * * \retval positive number for repaired cases * \retval 0 if nothing to be repaired * \retval negative error number on failure */ static int lfsck_namespace_insert_normal(const struct lu_env *env, struct lfsck_component *com, struct dt_object *parent, struct dt_object *child, const struct lu_name *lname) { struct lfsck_thread_info *info = lfsck_env_info(env); struct lu_attr *la = &info->lti_la; struct dt_insert_rec *rec = &info->lti_dt_rec; struct lfsck_instance *lfsck = com->lc_lfsck; /* The child and its name may be on different MDTs. */ const struct lu_fid *pfid = lfsck_dto2fid(parent); const struct lu_fid *cfid = lfsck_dto2fid(child); struct dt_device *dev = lfsck->li_next; struct thandle *th = NULL; struct lfsck_lock_handle *llh = &info->lti_llh; struct lmv_mds_md_v1 *lmv = &info->lti_lmv; struct lu_buf buf = { lmv, sizeof(*lmv) }; /* whether parent's LMV is deleted before insertion */ bool parent_lmv_deleted = false; /* whether parent's LMV is missing */ bool parent_lmv_lost = false; int rc = 0; ENTRY; /* @parent/@child may be based on lfsck->li_bottom, * but here we need the object based on the lfsck->li_next. */ parent = lfsck_object_locate(dev, parent); if (IS_ERR(parent)) GOTO(log, rc = PTR_ERR(parent)); child = lfsck_object_locate(dev, child); if (IS_ERR(child)) GOTO(log, rc = PTR_ERR(child)); if (lfsck->li_bookmark_ram.lb_param & LPF_DRYRUN) GOTO(log, rc = 1); rc = lfsck_lock(env, lfsck, parent, lname->ln_name, llh, MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE | MDS_INODELOCK_XATTR, LCK_EX); if (rc) GOTO(log, rc); rc = lfsck_object_is_shard(env, lfsck, child, lname); if (rc < 0) GOTO(unlock, rc); if (rc == 1) { rc = lfsck_read_stripe_lmv(env, lfsck, parent, lmv); if (!rc) { /* * To add a shard, we need to convert parent to a * plain directory by deleting its LMV, and after * insertion set it back. */ rc = lfsck_lmv_delete(env, lfsck, parent); if (rc) GOTO(unlock, rc); parent_lmv_deleted = true; lmv->lmv_layout_version++; lfsck_lmv_header_cpu_to_le(lmv, lmv); } else if (rc == -ENODATA) { struct lu_seq_range *range = &info->lti_range; struct seq_server_site *ss = lfsck_dev_site(lfsck); rc = lfsck_read_stripe_lmv(env, lfsck, child, lmv); if (rc) GOTO(unlock, rc); fld_range_set_mdt(range); rc = fld_server_lookup(env, ss->ss_server_fld, fid_seq(lfsck_dto2fid(parent)), range); if (rc) GOTO(unlock, rc); parent_lmv_lost = true; lmv->lmv_magic = LMV_MAGIC; lmv->lmv_master_mdt_index = range->lsr_index; lmv->lmv_layout_version++; lfsck_lmv_header_cpu_to_le(lmv, lmv); } else { GOTO(unlock, rc); } } if (unlikely(!dt_try_as_dir(env, parent))) GOTO(unlock, rc = -ENOTDIR); th = dt_trans_create(env, dev); if (IS_ERR(th)) GOTO(unlock, rc = PTR_ERR(th)); rec->rec_type = lfsck_object_type(child) & S_IFMT; rec->rec_fid = cfid; rc = dt_declare_insert(env, parent, (const struct dt_rec *)rec, (const struct dt_key *)lname->ln_name, th); if (rc != 0) GOTO(stop, rc); if (S_ISDIR(rec->rec_type)) { rc = dt_declare_ref_add(env, parent, th); if (rc != 0) GOTO(stop, rc); } if (parent_lmv_lost) { rc = dt_declare_xattr_set(env, parent, &buf, XATTR_NAME_LMV, 0, th); if (rc) GOTO(stop, rc); } la->la_ctime = ktime_get_real_seconds(); la->la_valid = LA_CTIME; rc = dt_declare_attr_set(env, parent, la, th); if (rc != 0) GOTO(stop, rc); rc = dt_declare_attr_set(env, child, la, th); if (rc != 0) GOTO(stop, rc); rc = dt_trans_start_local(env, dev, th); if (rc != 0) GOTO(stop, rc); rc = dt_insert(env, parent, (const struct dt_rec *)rec, (const struct dt_key *)lname->ln_name, th); if (rc != 0) GOTO(stop, rc); if (S_ISDIR(rec->rec_type)) { dt_write_lock(env, parent, 0); rc = dt_ref_add(env, parent, th); dt_write_unlock(env, parent); if (rc != 0) GOTO(stop, rc); } if (parent_lmv_lost) { rc = dt_xattr_set(env, parent, &buf, XATTR_NAME_LMV, 0, th); if (rc) GOTO(stop, rc); } rc = dt_attr_set(env, parent, la, th); if (rc != 0) GOTO(stop, rc); rc = dt_attr_set(env, child, la, th); GOTO(stop, rc = (rc == 0 ? 1 : rc)); stop: dt_trans_stop(env, dev, th); unlock: if (parent_lmv_deleted) lfsck_lmv_set(env, lfsck, parent, lmv); lfsck_unlock(llh); log: CDEBUG(D_LFSCK, "%s: namespace LFSCK insert object "DFID" with " "the name %s and type %o to the parent "DFID": rc = %d\n", lfsck_lfsck2name(lfsck), PFID(cfid), lname->ln_name, lfsck_object_type(child) & S_IFMT, PFID(pfid), rc); if (rc != 0) { struct lfsck_namespace *ns = com->lc_file_ram; ns->ln_flags |= LF_INCONSISTENT; if (rc > 0) ns->ln_lost_dirent_repaired++; } return rc; } /** * Create the specified orphan directory. * * For the case that the parent MDT-object stored in some MDT-object's * linkEA entry is lost, the LFSCK will re-create the parent object as * an orphan and insert it into .lustre/lost+found/MDTxxxx/ directory * with the name ${FID}-P-${conflict_version}. * * \param[in] env pointer to the thread context * \param[in] com pointer to the lfsck component * \param[in] orphan pointer to the orphan MDT-object to be created * \param[in] lmv pointer to master LMV EA that will be set to the orphan * * \retval positive number for repaired cases * \retval negative error number on failure */ static int lfsck_namespace_create_orphan_dir(const struct lu_env *env, struct lfsck_component *com, struct dt_object *orphan, struct lmv_mds_md_v1 *lmv) { struct lfsck_thread_info *info = lfsck_env_info(env); struct lu_attr *la = &info->lti_la; struct dt_allocation_hint *hint = &info->lti_hint; struct dt_object_format *dof = &info->lti_dof; struct lu_name *cname = &info->lti_name2; struct dt_insert_rec *rec = &info->lti_dt_rec; struct lmv_mds_md_v1 *lmv2 = &info->lti_lmv2; const struct lu_fid *cfid = lfsck_dto2fid(orphan); struct lu_fid tfid; struct lfsck_instance *lfsck = com->lc_lfsck; struct lfsck_namespace *ns = com->lc_file_ram; struct dt_device *dev = lfsck_obj2dev(orphan); struct dt_object *parent = NULL; struct thandle *th = NULL; struct lfsck_lock_handle *llh = &info->lti_llh; struct linkea_data ldata = { NULL }; struct lu_buf linkea_buf; struct lu_buf lmv_buf; char name[32]; int namelen; int idx = 0; int rc = 0; int rc1 = 0; ENTRY; LASSERT(!dt_object_exists(orphan)); cname->ln_name = NULL; if (lfsck->li_bookmark_ram.lb_param & LPF_DRYRUN) GOTO(log, rc = 1); if (dt_object_remote(orphan)) { LASSERT(lfsck->li_lpf_root_obj != NULL); idx = lfsck_find_mdt_idx_by_fid(env, lfsck, cfid); if (idx < 0) GOTO(log, rc = idx); snprintf(name, 8, "MDT%04x", idx); rc = dt_lookup_dir(env, lfsck->li_lpf_root_obj, name, &tfid); if (rc != 0) GOTO(log, rc = (rc == -ENOENT ? -ENXIO : rc)); parent = lfsck_object_find_bottom(env, lfsck, &tfid); if (IS_ERR(parent)) GOTO(log, rc = PTR_ERR(parent)); if (unlikely(!dt_try_as_dir(env, parent))) GOTO(log, rc = -ENOTDIR); } else { if (unlikely(lfsck->li_lpf_obj == NULL)) GOTO(log, rc = -ENXIO); parent = lfsck->li_lpf_obj; } dev = lfsck_find_dev_by_fid(env, lfsck, cfid); if (IS_ERR(dev)) GOTO(log, rc = PTR_ERR(dev)); idx = 0; again: do { namelen = snprintf(name, 31, DFID"-P-%d", PFID(cfid), idx++); rc = dt_lookup_dir(env, parent, name, &tfid); if (rc != 0 && rc != -ENOENT) GOTO(log, rc); } while (rc == 0); rc = lfsck_lock(env, lfsck, parent, name, llh, MDS_INODELOCK_UPDATE, LCK_PW); if (rc != 0) GOTO(log, rc); /* Re-check whether the name conflict with othrs after taken * the ldlm lock. */ rc = dt_lookup_dir(env, parent, name, &tfid); if (unlikely(rc == 0)) { lfsck_unlock(llh); goto again; } if (rc != -ENOENT) GOTO(unlock1, rc); cname->ln_name = name; cname->ln_namelen = namelen; memset(la, 0, sizeof(*la)); la->la_mode = S_IFDIR | 0700; la->la_valid = LA_TYPE | LA_MODE | LA_UID | LA_GID | LA_ATIME | LA_MTIME | LA_CTIME; orphan->do_ops->do_ah_init(env, hint, parent, orphan, la->la_mode & S_IFMT); memset(dof, 0, sizeof(*dof)); dof->dof_type = dt_mode_to_dft(S_IFDIR); rc = linkea_links_new(&ldata, &info->lti_linkea_buf2, cname, lfsck_dto2fid(parent)); if (rc != 0) GOTO(unlock1, rc); th = dt_trans_create(env, dev); if (IS_ERR(th)) GOTO(unlock1, rc = PTR_ERR(th)); /* Sync the remote transaction to guarantee that the subsequent * lock against the @orphan can find the @orphan in time. */ if (dt_object_remote(orphan)) th->th_sync = 1; rc = dt_declare_create(env, orphan, la, hint, dof, th); if (rc != 0) GOTO(stop, rc); if (unlikely(!dt_try_as_dir(env, orphan))) GOTO(stop, rc = -ENOTDIR); rc = dt_declare_ref_add(env, orphan, th); if (rc != 0) GOTO(stop, rc); rec->rec_type = S_IFDIR; rec->rec_fid = cfid; rc = dt_declare_insert(env, orphan, (const struct dt_rec *)rec, (const struct dt_key *)dot, th); if (rc != 0) GOTO(stop, rc); rec->rec_fid = lfsck_dto2fid(parent); rc = dt_declare_insert(env, orphan, (const struct dt_rec *)rec, (const struct dt_key *)dotdot, th); if (rc != 0) GOTO(stop, rc); if (lmv != NULL) { lmv->lmv_magic = LMV_MAGIC; lmv->lmv_master_mdt_index = lfsck_dev_idx(lfsck); lfsck_lmv_header_cpu_to_le(lmv2, lmv); lfsck_buf_init(&lmv_buf, lmv2, sizeof(*lmv2)); rc = dt_declare_xattr_set(env, orphan, &lmv_buf, XATTR_NAME_LMV, 0, th); if (rc != 0) GOTO(stop, rc); } lfsck_buf_init(&linkea_buf, ldata.ld_buf->lb_buf, ldata.ld_leh->leh_len); rc = dt_declare_xattr_set(env, orphan, &linkea_buf, XATTR_NAME_LINK, 0, th); if (rc != 0) GOTO(stop, rc); rec->rec_fid = cfid; rc = dt_declare_insert(env, parent, (const struct dt_rec *)rec, (const struct dt_key *)name, th); if (rc == 0) rc = dt_declare_ref_add(env, parent, th); if (rc != 0) GOTO(stop, rc); rc = dt_trans_start_local(env, dev, th); if (rc != 0) GOTO(stop, rc); dt_write_lock(env, orphan, 0); rc = dt_create(env, orphan, la, hint, dof, th); if (rc != 0) GOTO(unlock2, rc); rc = dt_ref_add(env, orphan, th); if (rc != 0) GOTO(unlock2, rc); rec->rec_fid = cfid; rc = dt_insert(env, orphan, (const struct dt_rec *)rec, (const struct dt_key *)dot, th); if (rc != 0) GOTO(unlock2, rc); rec->rec_fid = lfsck_dto2fid(parent); rc = dt_insert(env, orphan, (const struct dt_rec *)rec, (const struct dt_key *)dotdot, th); if (rc != 0) GOTO(unlock2, rc); if (lmv != NULL) { rc = dt_xattr_set(env, orphan, &lmv_buf, XATTR_NAME_LMV, 0, th); if (rc != 0) GOTO(unlock2, rc); } rc = dt_xattr_set(env, orphan, &linkea_buf, XATTR_NAME_LINK, 0, th); dt_write_unlock(env, orphan); if (rc != 0) GOTO(stop, rc); rec->rec_fid = cfid; rc = dt_insert(env, parent, (const struct dt_rec *)rec, (const struct dt_key *)name, th); if (rc == 0) { dt_write_lock(env, parent, 0); rc = dt_ref_add(env, parent, th); dt_write_unlock(env, parent); } GOTO(stop, rc = (rc == 0 ? 1 : rc)); unlock2: dt_write_unlock(env, orphan); stop: rc1 = dt_trans_stop(env, dev, th); if (rc1 != 0 && rc > 0) rc = rc1; unlock1: lfsck_unlock(llh); log: CDEBUG(D_LFSCK, "%s: namespace LFSCK create orphan dir for " "the object "DFID", name = %s: rc = %d\n", lfsck_lfsck2name(lfsck), PFID(cfid), cname->ln_name != NULL ? cname->ln_name : "", rc); if (parent != NULL && !IS_ERR(parent) && parent != lfsck->li_lpf_obj) lfsck_object_put(env, parent); if (rc != 0) ns->ln_flags |= LF_INCONSISTENT; return rc; } /** * Remove the specified entry from the linkEA. * * Locate the linkEA entry with the given @cname and @pfid, then * remove this entry or the other entries those are repeated with * this entry. * * \param[in] env pointer to the thread context * \param[in] com pointer to the lfsck component * \param[in] obj pointer to the dt_object to be handled * \param[in,out]ldata pointer to the buffer that holds the linkEA * \param[in] cname the name for the child in the parent directory * \param[in] pfid the parent directory's FID for the linkEA * \param[in] next if true, then remove the first found linkEA * entry, and move the ldata->ld_lee to next entry * * \retval positive number for repaired cases * \retval 0 if nothing to be repaired * \retval negative error number on failure */ static int lfsck_namespace_shrink_linkea(const struct lu_env *env, struct lfsck_component *com, struct dt_object *obj, struct linkea_data *ldata, struct lu_name *cname, struct lu_fid *pfid, bool next) { struct lfsck_instance *lfsck = com->lc_lfsck; struct dt_device *dev = lfsck_obj2dev(obj); struct lfsck_bookmark *bk = &lfsck->li_bookmark_ram; struct thandle *th = NULL; struct lustre_handle lh = { 0 }; struct linkea_data ldata_new = { NULL }; struct lu_buf linkea_buf; int buflen = 0; int rc = 0; ENTRY; rc = lfsck_ibits_lock(env, lfsck, obj, &lh, MDS_INODELOCK_UPDATE | MDS_INODELOCK_XATTR, LCK_EX); if (rc != 0) GOTO(log, rc); if (next) lfsck_linkea_del_buf(ldata, cname); else lfsck_namespace_filter_linkea_entry(ldata, cname, pfid, true); if (ldata->ld_leh->leh_reccount > 0 || unlikely(ldata->ld_leh->leh_overflow_time)) { lfsck_buf_init(&linkea_buf, ldata->ld_buf->lb_buf, ldata->ld_leh->leh_len); buflen = linkea_buf.lb_len; } again: th = dt_trans_create(env, dev); if (IS_ERR(th)) GOTO(unlock1, rc = PTR_ERR(th)); if (buflen != 0) rc = dt_declare_xattr_set(env, obj, &linkea_buf, XATTR_NAME_LINK, 0, th); else rc = dt_declare_xattr_del(env, obj, XATTR_NAME_LINK, th); if (rc != 0) GOTO(stop, rc); rc = dt_trans_start_local(env, dev, th); if (rc != 0) GOTO(stop, rc); dt_write_lock(env, obj, 0); if (unlikely(lfsck_is_dead_obj(obj))) GOTO(unlock2, rc = -ENOENT); rc = lfsck_links_read2_with_rec(env, obj, &ldata_new); if (rc) GOTO(unlock2, rc = (rc == -ENODATA ? 0 : rc)); /* The specified linkEA entry has been removed by race. */ rc = linkea_links_find(&ldata_new, cname, pfid); if (rc != 0) GOTO(unlock2, rc = 0); if (bk->lb_param & LPF_DRYRUN) GOTO(unlock2, rc = 1); if (next) lfsck_linkea_del_buf(&ldata_new, cname); else lfsck_namespace_filter_linkea_entry(&ldata_new, cname, pfid, true); /* * linkea may change because it doesn't take lock in the first read, if * it becomes larger, restart from beginning. */ if ((ldata_new.ld_leh->leh_reccount > 0 || unlikely(ldata_new.ld_leh->leh_overflow_time)) && buflen < ldata_new.ld_leh->leh_len) { dt_write_unlock(env, obj); dt_trans_stop(env, dev, th); lfsck_buf_init(&linkea_buf, ldata_new.ld_buf->lb_buf, ldata_new.ld_leh->leh_len); buflen = linkea_buf.lb_len; goto again; } if (buflen) rc = lfsck_links_write(env, obj, &ldata_new, th); else rc = dt_xattr_del(env, obj, XATTR_NAME_LINK, th); GOTO(unlock2, rc = (rc == 0 ? 1 : rc)); unlock2: dt_write_unlock(env, obj); stop: dt_trans_stop(env, dev, th); unlock1: lfsck_ibits_unlock(&lh, LCK_EX); log: CDEBUG(D_LFSCK, "%s: namespace LFSCK remove %s linkEA entry " "for the object: "DFID", parent "DFID", name %.*s\n", lfsck_lfsck2name(lfsck), next ? "invalid" : "redundant", PFID(lfsck_dto2fid(obj)), PFID(pfid), cname->ln_namelen, cname->ln_name); if (rc != 0) { struct lfsck_namespace *ns = com->lc_file_ram; ns->ln_flags |= LF_INCONSISTENT; } return rc; } /** * Conditionally remove the specified entry from the linkEA. * * Take the parent lock firstly, then check whether the specified * name entry exists or not: if yes, do nothing; otherwise, call * lfsck_namespace_shrink_linkea() to remove the linkea entry. * * \param[in] env pointer to the thread context * \param[in] com pointer to the lfsck component * \param[in] parent pointer to the parent directory * \param[in] child pointer to the child object that holds the linkEA * \param[in,out]ldata pointer to the buffer that holds the linkEA * \param[in] cname the name for the child in the parent directory * \param[in] pfid the parent directory's FID for the linkEA * * \retval positive number for repaired cases * \retval 0 if nothing to be repaired * \retval negative error number on failure */ static int lfsck_namespace_shrink_linkea_cond(const struct lu_env *env, struct lfsck_component *com, struct dt_object *parent, struct dt_object *child, struct linkea_data *ldata, struct lu_name *cname, struct lu_fid *pfid) { struct lfsck_thread_info *info = lfsck_env_info(env); struct lu_fid *cfid = &info->lti_fid3; struct lfsck_lock_handle *llh = &info->lti_llh; int rc; ENTRY; rc = lfsck_lock(env, com->lc_lfsck, parent, cname->ln_name, llh, MDS_INODELOCK_UPDATE, LCK_PR); if (rc != 0) RETURN(rc); dt_read_lock(env, parent, 0); if (unlikely(lfsck_is_dead_obj(parent))) { dt_read_unlock(env, parent); lfsck_unlock(llh); rc = lfsck_namespace_shrink_linkea(env, com, child, ldata, cname, pfid, true); RETURN(rc); } rc = dt_lookup(env, parent, (struct dt_rec *)cfid, (const struct dt_key *)cname->ln_name); dt_read_unlock(env, parent); /* It is safe to release the ldlm lock, because when the logic come * here, we have got all the needed information above whether the * linkEA entry is valid or not. It is not important that others * may add new linkEA entry after the ldlm lock released. If other * has removed the specified linkEA entry by race, then it is OK, * because the subsequent lfsck_namespace_shrink_linkea() can handle * such case. */ lfsck_unlock(llh); if (rc == -ENOENT) { rc = lfsck_namespace_shrink_linkea(env, com, child, ldata, cname, pfid, true); RETURN(rc); } if (rc != 0) RETURN(rc); /* The LFSCK just found some internal status of cross-MDTs * create operation. That is normal. */ if (lu_fid_eq(cfid, lfsck_dto2fid(child))) { linkea_next_entry(ldata); RETURN(0); } rc = lfsck_namespace_shrink_linkea(env, com, child, ldata, cname, pfid, true); RETURN(rc); } /** * Conditionally replace name entry in the parent. * * As required, the LFSCK may re-create the lost MDT-object for dangling * name entry, but such repairing may be wrong because of bad FID in the * name entry. As the LFSCK processing, the real MDT-object may be found, * then the LFSCK should check whether the former re-created MDT-object * has been modified or not, if not, then destroy it and update the name * entry in the parent to reference the real MDT-object. * * \param[in] env pointer to the thread context * \param[in] com pointer to the lfsck component * \param[in] parent pointer to the parent directory * \param[in] child pointer to the MDT-object that may be the real * MDT-object corresponding to the name entry in parent * \param[in] cfid the current FID in the name entry * \param[in] cname contains the name of the child in the parent directory * * \retval positive number for repaired cases * \retval 0 if nothing to be repaired * \retval negative error number on failure */ static int lfsck_namespace_replace_cond(const struct lu_env *env, struct lfsck_component *com, struct dt_object *parent, struct dt_object *child, const struct lu_fid *cfid, const struct lu_name *cname) { struct lfsck_thread_info *info = lfsck_env_info(env); struct lu_attr *la = &info->lti_la; struct dt_insert_rec *rec = &info->lti_dt_rec; struct lu_fid tfid; struct lfsck_instance *lfsck = com->lc_lfsck; /* The child and its name may be on different MDTs. */ struct dt_device *dev = lfsck->li_next; const char *name = cname->ln_name; const struct lu_fid *pfid = lfsck_dto2fid(parent); struct dt_object *cobj = NULL; struct lfsck_lock_handle *pllh = &info->lti_llh; struct lustre_handle clh = { 0 }; struct linkea_data ldata = { NULL }; struct thandle *th = NULL; bool exist = true; int rc = 0; ENTRY; /* @parent/@child may be based on lfsck->li_bottom, * but here we need the object based on the lfsck->li_next. */ parent = lfsck_object_locate(dev, parent); if (IS_ERR(parent)) GOTO(log, rc = PTR_ERR(parent)); if (unlikely(!dt_try_as_dir(env, parent))) GOTO(log, rc = -ENOTDIR); rc = lfsck_lock(env, lfsck, parent, name, pllh, MDS_INODELOCK_UPDATE, LCK_PW); if (rc != 0) GOTO(log, rc); if (!fid_is_sane(cfid)) { exist = false; goto replace; } cobj = lfsck_object_find_by_dev(env, dev, cfid); if (IS_ERR(cobj)) { rc = PTR_ERR(cobj); if (rc == -ENOENT) { exist = false; goto replace; } GOTO(log, rc); } if (!dt_object_exists(cobj)) { exist = false; goto replace; } rc = dt_lookup_dir(env, parent, name, &tfid); if (rc == -ENOENT) { exist = false; goto replace; } if (rc != 0) GOTO(log, rc); /* Someone changed the name entry, cannot replace it. */ if (!lu_fid_eq(cfid, &tfid)) GOTO(log, rc = 0); /* lock the object to be destroyed. */ rc = lfsck_ibits_lock(env, lfsck, cobj, &clh, MDS_INODELOCK_UPDATE | MDS_INODELOCK_UPDATE | MDS_INODELOCK_XATTR, LCK_EX); if (rc != 0) GOTO(log, rc); if (unlikely(lfsck_is_dead_obj(cobj))) { exist = false; goto replace; } rc = dt_attr_get(env, cobj, la); if (rc != 0) GOTO(log, rc); /* The object has been modified by other(s), or it is not created by * LFSCK, the two cases are indistinguishable. So cannot replace it. */ if (la->la_ctime != 0) GOTO(log, rc); if (S_ISREG(la->la_mode)) { rc = dt_xattr_get(env, cobj, &LU_BUF_NULL, XATTR_NAME_LOV); /* If someone has created related OST-object(s), * then keep it. */ if ((rc > 0) || (rc < 0 && rc != -ENODATA)) GOTO(log, rc = (rc > 0 ? 0 : rc)); } replace: dt_read_lock(env, child, 0); rc = lfsck_links_read2_with_rec(env, child, &ldata); dt_read_unlock(env, child); /* Someone changed the child, no need to replace. */ if (rc == -ENODATA) GOTO(log, rc = 0); if (rc != 0) GOTO(log, rc); rc = linkea_links_find(&ldata, cname, pfid); /* Someone moved the child, no need to replace. */ if (rc != 0) GOTO(log, rc = 0); if (lfsck->li_bookmark_ram.lb_param & LPF_DRYRUN) GOTO(log, rc = 1); th = dt_trans_create(env, dev); if (IS_ERR(th)) GOTO(log, rc = PTR_ERR(th)); if (exist) { rc = dt_declare_destroy(env, cobj, th); if (rc != 0) GOTO(stop, rc); } rc = dt_declare_delete(env, parent, (const struct dt_key *)name, th); if (rc != 0) GOTO(stop, rc); rec->rec_type = S_IFDIR; rec->rec_fid = lfsck_dto2fid(child); rc = dt_declare_insert(env, parent, (const struct dt_rec *)rec, (const struct dt_key *)name, th); if (rc != 0) GOTO(stop, rc); rc = dt_trans_start_local(env, dev, th); if (rc != 0) GOTO(stop, rc); if (exist) { rc = dt_destroy(env, cobj, th); if (rc != 0) GOTO(stop, rc); } /* The old name entry maybe not exist. */ rc = dt_delete(env, parent, (const struct dt_key *)name, th); if (rc != 0 && rc != -ENOENT) GOTO(stop, rc); rc = dt_insert(env, parent, (const struct dt_rec *)rec, (const struct dt_key *)name, th); GOTO(stop, rc = (rc == 0 ? 1 : rc)); stop: dt_trans_stop(env, dev, th); log: lfsck_ibits_unlock(&clh, LCK_EX); lfsck_unlock(pllh); if (cobj != NULL && !IS_ERR(cobj)) lfsck_object_put(env, cobj); CDEBUG(D_LFSCK, "%s: namespace LFSCK conditionally destroy the " "object "DFID" because of conflict with the object "DFID " under the parent "DFID" with name %s: rc = %d\n", lfsck_lfsck2name(lfsck), PFID(cfid), PFID(lfsck_dto2fid(child)), PFID(pfid), name, rc); return rc; } /** * Overwrite the linkEA for the object with the given ldata. * * The caller should take the ldlm lock before the calling. * * \param[in] env pointer to the thread context * \param[in] com pointer to the lfsck component * \param[in] obj pointer to the dt_object to be handled * \param[in] ldata pointer to the new linkEA data * * \retval positive number for repaired cases * \retval 0 if nothing to be repaired * \retval negative error number on failure */ int lfsck_namespace_rebuild_linkea(const struct lu_env *env, struct lfsck_component *com, struct dt_object *obj, struct linkea_data *ldata) { struct lfsck_instance *lfsck = com->lc_lfsck; struct dt_device *dev = lfsck_obj2dev(obj); struct thandle *th = NULL; struct lu_buf linkea_buf; int rc = 0; ENTRY; th = dt_trans_create(env, dev); if (IS_ERR(th)) GOTO(log, rc = PTR_ERR(th)); lfsck_buf_init(&linkea_buf, ldata->ld_buf->lb_buf, ldata->ld_leh->leh_len); rc = dt_declare_xattr_set(env, obj, &linkea_buf, XATTR_NAME_LINK, 0, th); if (rc != 0) GOTO(stop, rc); rc = dt_trans_start_local(env, dev, th); if (rc != 0) GOTO(stop, rc); dt_write_lock(env, obj, 0); if (unlikely(lfsck_is_dead_obj(obj))) GOTO(unlock, rc = 0); if (lfsck->li_bookmark_ram.lb_param & LPF_DRYRUN) GOTO(unlock, rc = 1); rc = dt_xattr_set(env, obj, &linkea_buf, XATTR_NAME_LINK, 0, th); GOTO(unlock, rc = (rc == 0 ? 1 : rc)); unlock: dt_write_unlock(env, obj); stop: dt_trans_stop(env, dev, th); log: CDEBUG(D_LFSCK, "%s: namespace LFSCK rebuild linkEA for the " "object "DFID": rc = %d\n", lfsck_lfsck2name(lfsck), PFID(lfsck_dto2fid(obj)), rc); if (rc != 0) { struct lfsck_namespace *ns = com->lc_file_ram; ns->ln_flags |= LF_INCONSISTENT; } return rc; } /** * Repair invalid name entry. * * If the name entry contains invalid information, such as bad file type * or (and) corrupted object FID, then either remove the name entry or * udpate the name entry with the given (right) information. * * \param[in] env pointer to the thread context * \param[in] com pointer to the lfsck component * \param[in] parent pointer to the parent directory * \param[in] child pointer to the object referenced by the name entry * \param[in] name the old name of the child under the parent directory * \param[in] name2 the new name of the child under the parent directory * \param[in] type the type claimed by the name entry * \param[in] update update the name entry if true; otherwise, remove it * \param[in] dec decrease the parent nlink count if true * * \retval positive number for repaired successfully * \retval 0 if nothing to be repaired * \retval negative error number on failure */ int lfsck_namespace_repair_dirent(const struct lu_env *env, struct lfsck_component *com, struct dt_object *parent, struct dt_object *child, const char *name, const char *name2, __u16 type, bool update, bool dec) { struct lfsck_thread_info *info = lfsck_env_info(env); struct dt_insert_rec *rec = &info->lti_dt_rec; const struct lu_fid *pfid = lfsck_dto2fid(parent); struct lu_fid cfid = {0}; struct lu_fid tfid; struct lfsck_instance *lfsck = com->lc_lfsck; struct dt_device *dev = lfsck->li_next; struct thandle *th = NULL; struct lfsck_lock_handle *llh = &info->lti_llh; struct lustre_handle lh = { 0 }; int rc = 0; ENTRY; if (child) cfid = *lfsck_dto2fid(child); parent = lfsck_object_locate(dev, parent); if (IS_ERR(parent)) GOTO(log, rc = PTR_ERR(parent)); if (unlikely(!dt_try_as_dir(env, parent))) GOTO(log, rc = -ENOTDIR); if (!update || strcmp(name, name2) == 0) rc = lfsck_lock(env, lfsck, parent, name, llh, MDS_INODELOCK_UPDATE, LCK_PW); else rc = lfsck_ibits_lock(env, lfsck, parent, &lh, MDS_INODELOCK_UPDATE, LCK_PW); if (rc != 0) GOTO(log, rc); th = dt_trans_create(env, dev); if (IS_ERR(th)) GOTO(unlock1, rc = PTR_ERR(th)); rc = dt_declare_delete(env, parent, (const struct dt_key *)name, th); if (rc != 0) GOTO(stop, rc); if (update) { rec->rec_type = lfsck_object_type(child) & S_IFMT; LASSERT(!fid_is_zero(&cfid)); rec->rec_fid = &cfid; rc = dt_declare_insert(env, parent, (const struct dt_rec *)rec, (const struct dt_key *)name2, th); if (rc != 0) GOTO(stop, rc); } if (dec && S_ISDIR(type)) { rc = dt_declare_ref_del(env, parent, th); if (rc != 0) GOTO(stop, rc); } rc = dt_trans_start_local(env, dev, th); if (rc != 0) GOTO(stop, rc); dt_write_lock(env, parent, 0); rc = dt_lookup_dir(env, dt_object_child(parent), name, &tfid); /* Someone has removed the bad name entry by race. */ if (rc == -ENOENT) GOTO(unlock2, rc = 0); if (rc != 0) GOTO(unlock2, rc); /* Someone has removed the bad name entry and reused it for other * object by race. */ if (!lu_fid_eq(&tfid, &cfid)) GOTO(unlock2, rc = 0); if (lfsck->li_bookmark_ram.lb_param & LPF_DRYRUN) GOTO(unlock2, rc = 1); rc = dt_delete(env, parent, (const struct dt_key *)name, th); if (rc != 0) GOTO(unlock2, rc); if (update) { rc = dt_insert(env, parent, (const struct dt_rec *)rec, (const struct dt_key *)name2, th); if (rc != 0) GOTO(unlock2, rc); } if (dec && S_ISDIR(type)) { rc = dt_ref_del(env, parent, th); if (rc != 0) GOTO(unlock2, rc); } GOTO(unlock2, rc = (rc == 0 ? 1 : rc)); unlock2: dt_write_unlock(env, parent); stop: dt_trans_stop(env, dev, th); /* We are not sure whether the child will become orphan or not. * Record it in the LFSCK trace file for further checking in * the second-stage scanning. */ if (!update && !dec && child && rc == 0) lfsck_namespace_trace_update(env, com, &cfid, LNTF_CHECK_LINKEA, true); unlock1: /* It is harmless even if unlock the unused lock_handle */ lfsck_ibits_unlock(&lh, LCK_PW); lfsck_unlock(llh); log: CDEBUG(D_LFSCK, "%s: namespace LFSCK assistant found bad name " "entry for: parent "DFID", child "DFID", name %s, type " "in name entry %o, type claimed by child %o. repair it " "by %s with new name2 %s: rc = %d\n", lfsck_lfsck2name(lfsck), PFID(pfid), PFID(&cfid), name, type, update ? lfsck_object_type(child) : 0, update ? "updating" : "removing", name2, rc); if (rc != 0) { struct lfsck_namespace *ns = com->lc_file_ram; ns->ln_flags |= LF_INCONSISTENT; } return rc; } /** * Update the ".." name entry for the given object. * * The object's ".." is corrupted, this function will update the ".." name * entry with the given pfid, and the linkEA with the given ldata. * * The caller should take the ldlm lock before the calling. * * \param[in] env pointer to the thread context * \param[in] com pointer to the lfsck component * \param[in] obj pointer to the dt_object to be handled * \param[in] pfid the new fid for the object's ".." name entry * \param[in] cname the name for the @obj in the parent directory * * \retval positive number for repaired cases * \retval 0 if nothing to be repaired * \retval negative error number on failure */ static int lfsck_namespace_repair_unmatched_pairs(const struct lu_env *env, struct lfsck_component *com, struct dt_object *obj, const struct lu_fid *pfid, struct lu_name *cname) { struct lfsck_thread_info *info = lfsck_env_info(env); struct dt_insert_rec *rec = &info->lti_dt_rec; struct lfsck_instance *lfsck = com->lc_lfsck; struct dt_device *dev = lfsck_obj2dev(obj); struct thandle *th = NULL; struct linkea_data ldata = { NULL }; struct lu_buf linkea_buf; int rc = 0; ENTRY; LASSERT(!dt_object_remote(obj)); LASSERT(S_ISDIR(lfsck_object_type(obj))); rc = linkea_links_new(&ldata, &info->lti_big_buf, cname, pfid); if (rc != 0) GOTO(log, rc); lfsck_buf_init(&linkea_buf, ldata.ld_buf->lb_buf, ldata.ld_leh->leh_len); th = dt_trans_create(env, dev); if (IS_ERR(th)) GOTO(log, rc = PTR_ERR(th)); rc = dt_declare_delete(env, obj, (const struct dt_key *)dotdot, th); if (rc != 0) GOTO(stop, rc); rec->rec_type = S_IFDIR; rec->rec_fid = pfid; rc = dt_declare_insert(env, obj, (const struct dt_rec *)rec, (const struct dt_key *)dotdot, th); if (rc != 0) GOTO(stop, rc); rc = dt_declare_xattr_set(env, obj, &linkea_buf, XATTR_NAME_LINK, 0, th); if (rc != 0) GOTO(stop, rc); rc = dt_trans_start_local(env, dev, th); if (rc != 0) GOTO(stop, rc); dt_write_lock(env, obj, 0); if (unlikely(lfsck_is_dead_obj(obj))) GOTO(unlock, rc = 0); if (lfsck->li_bookmark_ram.lb_param & LPF_DRYRUN) GOTO(unlock, rc = 1); /* The old ".." name entry maybe not exist. */ dt_delete(env, obj, (const struct dt_key *)dotdot, th); rc = dt_insert(env, obj, (const struct dt_rec *)rec, (const struct dt_key *)dotdot, th); if (rc != 0) GOTO(unlock, rc); rc = lfsck_links_write(env, obj, &ldata, th); GOTO(unlock, rc = (rc == 0 ? 1 : rc)); unlock: dt_write_unlock(env, obj); stop: dt_trans_stop(env, dev, th); log: CDEBUG(D_LFSCK, "%s: namespace LFSCK rebuild dotdot name entry for " "the object "DFID", new parent "DFID": rc = %d\n", lfsck_lfsck2name(lfsck), PFID(lfsck_dto2fid(obj)), PFID(pfid), rc); if (rc != 0) { struct lfsck_namespace *ns = com->lc_file_ram; ns->ln_flags |= LF_INCONSISTENT; } return rc; } /** * Handle orphan @obj during Double Scan Directory. * * Remove the @obj's current (invalid) linkEA entries, and insert * it in the directory .lustre/lost+found/MDTxxxx/ with the name: * ${FID}-${PFID}-D-${conflict_version} * * The caller should take the ldlm lock before the calling. * * \param[in] env pointer to the thread context * \param[in] com pointer to the lfsck component * \param[in] obj pointer to the orphan object to be handled * \param[in] pfid the new fid for the object's ".." name entry * \param[in,out] lh ldlm lock handler for the given @obj * \param[out] type to tell the caller what the inconsistency is * * \retval positive number for repaired cases * \retval 0 if nothing to be repaired * \retval negative error number on failure */ static int lfsck_namespace_dsd_orphan(const struct lu_env *env, struct lfsck_component *com, struct dt_object *obj, const struct lu_fid *pfid, struct lustre_handle *lh, enum lfsck_namespace_inconsistency_type *type) { struct lfsck_thread_info *info = lfsck_env_info(env); struct lfsck_namespace *ns = com->lc_file_ram; int rc; ENTRY; /* Remove the unrecognized linkEA. */ rc = lfsck_namespace_links_remove(env, com, obj); lfsck_ibits_unlock(lh, LCK_EX); if (rc < 0 && rc != -ENODATA) RETURN(rc); *type = LNIT_MUL_REF; /* If the LFSCK is marked as LF_INCOMPLETE, then means some MDT has * ever tried to verify some remote MDT-object that resides on this * MDT, but this MDT failed to respond such request. So means there * may be some remote name entry on other MDT that references this * object with another name, so we cannot know whether this linkEA * is valid or not. So keep it there and maybe resolved when next * LFSCK run. */ if (ns->ln_flags & LF_INCOMPLETE) RETURN(0); /* The unique linkEA is invalid, even if the ".." name entry may be * valid, we still cannot know via which name entry this directory * will be referenced. Then handle it as pure orphan. */ snprintf(info->lti_tmpbuf, sizeof(info->lti_tmpbuf), "-"DFID, PFID(pfid)); rc = lfsck_namespace_insert_orphan(env, com, obj, info->lti_tmpbuf, "D", NULL); RETURN(rc); } /** * Double Scan Directory object for single linkEA entry case. * * The given @child has unique linkEA entry. If the linkEA entry is valid, * then check whether the name is in the namespace or not, if not, add the * missing name entry back to namespace. If the linkEA entry is invalid, * then remove it and insert the @child in the .lustre/lost+found/MDTxxxx/ * as an orphan. * * \param[in] env pointer to the thread context * \param[in] com pointer to the lfsck component * \param[in] child pointer to the directory to be double scanned * \param[in] pfid the FID corresponding to the ".." entry * \param[in] ldata pointer to the linkEA data for the given @child * \param[in,out] lh ldlm lock handler for the given @child * \param[out] type to tell the caller what the inconsistency is * \param[in] retry if found inconsistency, but the caller does not hold * ldlm lock on the @child, then set @retry as true * \param[in] unknown set if does not know how to repair the inconsistency * * \retval positive number for repaired cases * \retval 0 if nothing to be repaired * \retval negative error number on failure */ static int lfsck_namespace_dsd_single(const struct lu_env *env, struct lfsck_component *com, struct dt_object *child, const struct lu_fid *pfid, struct linkea_data *ldata, struct lustre_handle *lh, enum lfsck_namespace_inconsistency_type *type, bool *retry, bool *unknown) { struct lfsck_thread_info *info = lfsck_env_info(env); struct lu_name *cname = &info->lti_name; const struct lu_fid *cfid = lfsck_dto2fid(child); struct lu_fid tfid; struct lfsck_namespace *ns = com->lc_file_ram; struct lfsck_instance *lfsck = com->lc_lfsck; struct dt_object *parent = NULL; struct lmv_mds_md_v1 *lmv; int rc = 0; ENTRY; rc = lfsck_namespace_unpack_linkea_entry(ldata, cname, &tfid, info->lti_key, sizeof(info->lti_key)); /* The unique linkEA entry with bad parent will be handled as orphan. */ if (rc != 0) { if (!lustre_handle_is_used(lh) && retry != NULL) *retry = true; else rc = lfsck_namespace_dsd_orphan(env, com, child, pfid, lh, type); GOTO(out, rc); } parent = lfsck_object_find_bottom(env, lfsck, &tfid); if (IS_ERR(parent)) GOTO(out, rc = PTR_ERR(parent)); /* We trust the unique linkEA entry in spite of whether it matches the * ".." name entry or not. Because even if the linkEA entry is wrong * and the ".." name entry is right, we still cannot know via which * name entry the child will be referenced, since all known entries * have been verified during the first-stage scanning. */ if (!dt_object_exists(parent)) { /* If the LFSCK is marked as LF_INCOMPLETE, then means some MDT * has ever tried to verify some remote MDT-object that resides * on this MDT, but this MDT failed to respond such request. So * means there may be some remote name entry on other MDT that * references this object with another name, so we cannot know * whether this linkEA is valid or not. So keep it there and * maybe resolved when next LFSCK run. */ if (ns->ln_flags & LF_INCOMPLETE) GOTO(out, rc = 0); if (!lustre_handle_is_used(lh) && retry != NULL) { *retry = true; GOTO(out, rc = 0); } lfsck_ibits_unlock(lh, LCK_EX); lost_parent: lmv = &info->lti_lmv; rc = lfsck_read_stripe_lmv(env, lfsck, child, lmv); if (rc != 0 && rc != -ENODATA) GOTO(out, rc); if (rc == -ENODATA || lmv->lmv_magic != LMV_MAGIC_STRIPE) { lmv = NULL; } else if (lfsck_shard_name_to_index(env, cname->ln_name, cname->ln_namelen, S_IFDIR, cfid) < 0) { /* It is an invalid name entry, we * cannot trust the parent also. */ rc = lfsck_namespace_shrink_linkea(env, com, child, ldata, cname, &tfid, true); if (rc < 0) GOTO(out, rc); snprintf(info->lti_tmpbuf, sizeof(info->lti_tmpbuf), "-"DFID, PFID(pfid)); rc = lfsck_namespace_insert_orphan(env, com, child, info->lti_tmpbuf, "S", NULL); GOTO(out, rc); } /* Create the lost parent as an orphan. */ rc = lfsck_namespace_create_orphan_dir(env, com, parent, lmv); if (rc >= 0) { /* Add the missing name entry to the parent. */ rc = lfsck_namespace_insert_normal(env, com, parent, child, cname); if (unlikely(rc == -EEXIST)) { /* Unfortunately, someone reused the name * under the parent by race. So we have * to remove the linkEA entry from * current child object. It means that the * LFSCK cannot recover the system * totally back to its original status, * but it is necessary to make the * current system to be consistent. */ rc = lfsck_namespace_shrink_linkea(env, com, child, ldata, cname, &tfid, true); if (rc >= 0) { snprintf(info->lti_tmpbuf, sizeof(info->lti_tmpbuf), "-"DFID, PFID(pfid)); rc = lfsck_namespace_insert_orphan(env, com, child, info->lti_tmpbuf, "D", NULL); } } } GOTO(out, rc); } /* !dt_object_exists(parent) */ /* The unique linkEA entry with bad parent will be handled as orphan. */ if (unlikely(!dt_try_as_dir(env, parent))) { if (!lustre_handle_is_used(lh) && retry != NULL) *retry = true; else rc = lfsck_namespace_dsd_orphan(env, com, child, pfid, lh, type); GOTO(out, rc); } rc = dt_lookup_dir(env, parent, cname->ln_name, &tfid); if (rc == -ENOENT) { /* If the LFSCK is marked as LF_INCOMPLETE, then means some MDT * has ever tried to verify some remote MDT-object that resides * on this MDT, but this MDT failed to respond such request. So * means there may be some remote name entry on other MDT that * references this object with another name, so we cannot know * whether this linkEA is valid or not. So keep it there and * maybe resolved when next LFSCK run. */ if (ns->ln_flags & LF_INCOMPLETE) GOTO(out, rc = 0); if (!lustre_handle_is_used(lh) && retry != NULL) { *retry = true; GOTO(out, rc = 0); } lfsck_ibits_unlock(lh, LCK_EX); rc = lfsck_namespace_check_name(env, lfsck, parent, child, cname); if (rc == -ENOENT) goto lost_parent; if (rc < 0) GOTO(out, rc); /* It is an invalid name entry, drop it. */ if (unlikely(rc > 0)) { rc = lfsck_namespace_shrink_linkea(env, com, child, ldata, cname, &tfid, true); if (rc >= 0) { snprintf(info->lti_tmpbuf, sizeof(info->lti_tmpbuf), "-"DFID, PFID(pfid)); rc = lfsck_namespace_insert_orphan(env, com, child, info->lti_tmpbuf, "D", NULL); } GOTO(out, rc); } /* Add the missing name entry back to the namespace. */ rc = lfsck_namespace_insert_normal(env, com, parent, child, cname); if (unlikely(rc == -ESTALE)) /* It may happen when the remote object has been * removed, but the local MDT is not aware of that. */ goto lost_parent; if (unlikely(rc == -EEXIST)) { /* Unfortunately, someone reused the name under the * parent by race. So we have to remove the linkEA * entry from current child object. It means that the * LFSCK cannot recover the system totally back to * its original status, but it is necessary to make * the current system to be consistent. * * It also may be because of the LFSCK found some * internal status of create operation. Under such * case, nothing to be done. */ rc = lfsck_namespace_shrink_linkea_cond(env, com, parent, child, ldata, cname, &tfid); if (rc >= 0) { snprintf(info->lti_tmpbuf, sizeof(info->lti_tmpbuf), "-"DFID, PFID(pfid)); rc = lfsck_namespace_insert_orphan(env, com, child, info->lti_tmpbuf, "D", NULL); } } GOTO(out, rc); } /* rc == -ENOENT */ if (rc != 0) GOTO(out, rc); if (!lu_fid_eq(&tfid, cfid)) { if (!lustre_handle_is_used(lh) && retry != NULL) { *retry = true; GOTO(out, rc = 0); } lfsck_ibits_unlock(lh, LCK_EX); /* The name entry references another MDT-object that * may be created by the LFSCK for repairing dangling * name entry. Try to replace it. */ rc = lfsck_namespace_replace_cond(env, com, parent, child, &tfid, cname); if (rc == 0) rc = lfsck_namespace_dsd_orphan(env, com, child, pfid, lh, type); GOTO(out, rc); } /* Zero FID may because the remote directroy object has invalid linkEA, * or lost linkEA. Under such case, the LFSCK on this MDT does not know * how to repair the inconsistency, but the namespace LFSCK on the MDT * where its name entry resides may has more information (name, FID) to * repair such inconsistency. So here, keep the inconsistency to avoid * some imporper repairing. */ if (fid_is_zero(pfid)) { if (unknown) *unknown = true; GOTO(out, rc = 0); } /* The ".." name entry is wrong, update it. */ if (!lu_fid_eq(pfid, lfsck_dto2fid(parent))) { if (!lustre_handle_is_used(lh) && retry != NULL) { *retry = true; GOTO(out, rc = 0); } *type = LNIT_UNMATCHED_PAIRS; rc = lfsck_namespace_repair_unmatched_pairs(env, com, child, lfsck_dto2fid(parent), cname); } GOTO(out, rc); out: if (parent != NULL && !IS_ERR(parent)) lfsck_object_put(env, parent); return rc; } /** * Double Scan Directory object for multiple linkEA entries case. * * The given @child has multiple linkEA entries. There is at most one linkEA * entry will be valid, all the others will be removed. Firstly, the function * will try to find out the linkEA entry for which the name entry exists under * the given parent (@pfid). If there is no linkEA entry that matches the given * ".." name entry, then tries to find out the first linkEA entry that both the * parent and the name entry exist to rebuild a new ".." name entry. * * \param[in] env pointer to the thread context * \param[in] com pointer to the lfsck component * \param[in] child pointer to the directory to be double scanned * \param[in] pfid the FID corresponding to the ".." entry * \param[in] ldata pointer to the linkEA data for the given @child * \param[in,out] lh ldlm lock handler for the given @child * \param[out] type to tell the caller what the inconsistency is * \param[in] lpf true if the ".." entry is under lost+found/MDTxxxx/ * \param[in] unknown set if does not know how to repair the inconsistency * * \retval positive number for repaired cases * \retval 0 if nothing to be repaired * \retval negative error number on failure */ static int lfsck_namespace_dsd_multiple(const struct lu_env *env, struct lfsck_component *com, struct dt_object *child, const struct lu_fid *pfid, struct linkea_data *ldata, struct lustre_handle *lh, enum lfsck_namespace_inconsistency_type *type, bool lpf, bool *unknown) { struct lfsck_thread_info *info = lfsck_env_info(env); struct lu_name *cname = &info->lti_name; const struct lu_fid *cfid = lfsck_dto2fid(child); struct lu_fid *pfid2 = &info->lti_fid3; struct lu_fid tfid; struct lfsck_namespace *ns = com->lc_file_ram; struct lfsck_instance *lfsck = com->lc_lfsck; struct lfsck_bookmark *bk = &lfsck->li_bookmark_ram; struct dt_object *parent = NULL; struct linkea_data ldata_new = { NULL }; int dirent_count = 0; int rc = 0; bool once = true; ENTRY; again: while (ldata->ld_lee != NULL) { rc = lfsck_namespace_unpack_linkea_entry(ldata, cname, &tfid, info->lti_key, sizeof(info->lti_key)); /* Drop invalid linkEA entry. */ if (rc != 0) { lfsck_linkea_del_buf(ldata, cname); continue; } /* Drop repeated linkEA entries. */ lfsck_namespace_filter_linkea_entry(ldata, cname, &tfid, true); /* If current dotdot is the .lustre/lost+found/MDTxxxx/, * then it is possible that: the directry object has ever * been lost, but its name entry was there. In the former * LFSCK run, during the first-stage scanning, the LFSCK * found the dangling name entry, but it did not recreate * the lost object, and when moved to the second-stage * scanning, some children objects of the lost directory * object were found, then the LFSCK recreated such lost * directory object as an orphan. * * When the LFSCK runs again, if the dangling name is still * there, the LFSCK should move the orphan directory object * back to the normal namespace. */ if (!lpf && !fid_is_zero(pfid) && !lu_fid_eq(pfid, &tfid) && once) { linkea_next_entry(ldata); continue; } parent = lfsck_object_find_bottom(env, lfsck, &tfid); if (IS_ERR(parent)) { rc = PTR_ERR(parent); /* if @pfid doesn't have a valid OI mapping, it will * trigger OI scrub, and -ENONET is is returned if it's * remote, -EINPROGRESS if local. */ if ((rc == -ENOENT || rc == -EINPROGRESS) && ldata->ld_leh->leh_reccount > 1) { lfsck_linkea_del_buf(ldata, cname); continue; } RETURN(rc); } if (!dt_object_exists(parent)) { lfsck_object_put(env, parent); if (ldata->ld_leh->leh_reccount > 1) { /* If it is NOT the last linkEA entry, then * there is still other chance to make the * child to be visible via other parent, then * remove this linkEA entry. */ lfsck_linkea_del_buf(ldata, cname); continue; } break; } /* The linkEA entry with bad parent will be removed. */ if (unlikely(!dt_try_as_dir(env, parent))) { lfsck_object_put(env, parent); lfsck_linkea_del_buf(ldata, cname); continue; } rc = dt_lookup_dir(env, parent, cname->ln_name, &tfid); *pfid2 = *lfsck_dto2fid(parent); if (rc == -ENOENT) { lfsck_object_put(env, parent); linkea_next_entry(ldata); continue; } if (rc != 0) { lfsck_object_put(env, parent); RETURN(rc); } if (lu_fid_eq(&tfid, cfid)) { lfsck_object_put(env, parent); /* If the parent (that is declared via linkEA entry) * directory contains the specified child, but such * parent does not match the dotdot name entry, then * trust the linkEA. */ if (!fid_is_zero(pfid) && !lu_fid_eq(pfid, pfid2)) { *type = LNIT_UNMATCHED_PAIRS; rc = lfsck_namespace_repair_unmatched_pairs(env, com, child, pfid2, cname); RETURN(rc); } rebuild: /* It is the most common case that we find the * name entry corresponding to the linkEA entry * that matches the ".." name entry. */ rc = linkea_links_new(&ldata_new, &info->lti_big_buf, cname, pfid2); if (rc != 0) RETURN(rc); rc = lfsck_namespace_rebuild_linkea(env, com, child, &ldata_new); if (rc < 0) RETURN(rc); lfsck_linkea_del_buf(ldata, cname); linkea_first_entry(ldata); /* There may be some invalid dangling name entries under * other parent directories, remove all of them. */ while (ldata->ld_lee != NULL) { rc = lfsck_namespace_unpack_linkea_entry(ldata, cname, &tfid, info->lti_key, sizeof(info->lti_key)); if (rc != 0) goto next; parent = lfsck_object_find_bottom(env, lfsck, &tfid); if (IS_ERR(parent)) { rc = PTR_ERR(parent); if (rc != -ENOENT && bk->lb_param & LPF_FAILOUT) RETURN(rc); goto next; } if (!dt_object_exists(parent)) { lfsck_object_put(env, parent); goto next; } rc = lfsck_namespace_repair_dirent(env, com, parent, child, cname->ln_name, cname->ln_name, S_IFDIR, false, true); lfsck_object_put(env, parent); if (rc < 0) { if (bk->lb_param & LPF_FAILOUT) RETURN(rc); goto next; } dirent_count += rc; next: lfsck_linkea_del_buf(ldata, cname); } ns->ln_dirent_repaired += dirent_count; RETURN(rc); } /* lu_fid_eq(&tfid, lfsck_dto2fid(child)) */ lfsck_ibits_unlock(lh, LCK_EX); /* The name entry references another MDT-object that may be * created by the LFSCK for repairing dangling name entry. * Try to replace it. */ rc = lfsck_namespace_replace_cond(env, com, parent, child, &tfid, cname); lfsck_object_put(env, parent); if (rc < 0) RETURN(rc); if (rc > 0) goto rebuild; lfsck_linkea_del_buf(ldata, cname); } /* while (ldata->ld_lee != NULL) */ /* If there is still linkEA overflow, return. */ if (unlikely(ldata->ld_leh->leh_overflow_time)) RETURN(0); linkea_first_entry(ldata); if (ldata->ld_leh->leh_reccount == 1) { rc = lfsck_namespace_dsd_single(env, com, child, pfid, ldata, lh, type, NULL, unknown); RETURN(rc); } /* All linkEA entries are invalid and removed, then handle the @child * as an orphan.*/ if (ldata->ld_leh->leh_reccount == 0) { rc = lfsck_namespace_dsd_orphan(env, com, child, pfid, lh, type); RETURN(rc); } /* If the dangling name entry for the orphan directory object has * been remvoed, then just check whether the directory object is * still under the .lustre/lost+found/MDTxxxx/ or not. */ if (lpf) { lpf = false; goto again; } /* There is no linkEA entry that matches the ".." name entry. Find * the first linkEA entry that both parent and name entry exist to * rebuild a new ".." name entry. */ if (once) { once = false; goto again; } RETURN(rc); } /** * Repair the object's nlink attribute. * * If all the known name entries have been verified, then the object's hard * link attribute should match the object's linkEA entries count unless the * object's has too many hard link to be recorded in the linkEA. Such cases * should have been marked in the LFSCK trace file. Otherwise, trust the * linkEA to update the object's nlink attribute. * * \param[in] env pointer to the thread context * \param[in] com pointer to the lfsck component * \param[in] obj pointer to the dt_object to be handled * \param[in,out] la pointer to buffer to object's attribute before * and after the repairing * * \retval positive number for repaired cases * \retval 0 if nothing to be repaired * \retval negative error number on failure */ static int lfsck_namespace_repair_nlink(const struct lu_env *env, struct lfsck_component *com, struct dt_object *obj, struct lu_attr *la) { struct lfsck_namespace *ns = com->lc_file_ram; struct lfsck_instance *lfsck = com->lc_lfsck; struct dt_device *dev = lfsck_obj2dev(obj); const struct lu_fid *cfid = lfsck_dto2fid(obj); struct thandle *th = NULL; struct linkea_data ldata = { NULL }; struct lustre_handle lh = { 0 }; __u32 old = la->la_nlink; int rc = 0; ENTRY; LASSERT(!dt_object_remote(obj)); rc = lfsck_ibits_lock(env, lfsck, obj, &lh, MDS_INODELOCK_UPDATE, LCK_PW); if (rc != 0) GOTO(log, rc); th = dt_trans_create(env, dev); if (IS_ERR(th)) GOTO(log, rc = PTR_ERR(th)); la->la_valid = LA_NLINK; rc = dt_declare_attr_set(env, obj, la, th); if (rc != 0) GOTO(stop, rc); rc = dt_trans_start_local(env, dev, th); if (rc != 0) GOTO(stop, rc); dt_write_lock(env, obj, 0); /* If the LFSCK is marked as LF_INCOMPLETE, then means some MDT has * ever tried to verify some remote MDT-object that resides on this * MDT, but this MDT failed to respond such request. So means there * may be some remote name entry on other MDT that references this * object with another name, so we cannot know whether this linkEA * is valid or not. So keep it there and maybe resolved when next * LFSCK run. */ if (ns->ln_flags & LF_INCOMPLETE) GOTO(unlock, rc = 0); rc = dt_attr_get(env, obj, la); if (rc != 0) GOTO(unlock, rc = (rc == -ENOENT ? 0 : rc)); rc = lfsck_links_read2_with_rec(env, obj, &ldata); if (rc) GOTO(unlock, rc = (rc == -ENODATA ? 0 : rc)); /* XXX: Currently, we only update the nlink attribute if the known * linkEA entries is larger than the nlink attribute. That is * safe action. */ if (la->la_nlink >= ldata.ld_leh->leh_reccount || unlikely(la->la_nlink == 0 || ldata.ld_leh->leh_overflow_time)) GOTO(unlock, rc = 0); la->la_nlink = ldata.ld_leh->leh_reccount; if (lfsck->li_bookmark_ram.lb_param & LPF_DRYRUN) GOTO(unlock, rc = 1); rc = dt_attr_set(env, obj, la, th); GOTO(unlock, rc = (rc == 0 ? 1 : rc)); unlock: dt_write_unlock(env, obj); stop: dt_trans_stop(env, dev, th); log: lfsck_ibits_unlock(&lh, LCK_PW); CDEBUG(D_LFSCK, "%s: namespace LFSCK repaired the object "DFID"'s " "nlink count from %u to %u: rc = %d\n", lfsck_lfsck2name(lfsck), PFID(cfid), old, la->la_nlink, rc); if (rc != 0) ns->ln_flags |= LF_INCONSISTENT; return rc; } /** * Double scan the directory object for namespace LFSCK. * * This function will verify the pairs in the namespace tree: * the parent references the child via some name entry that should be in the * child's linkEA entry, the child should back references the parent via its * ".." name entry. * * The LFSCK will scan every linkEA entry in turn until find out the first * matched pairs. If found, then all other linkEA entries will be dropped. * If all the linkEA entries cannot match the ".." name entry, then there * are serveral possible cases: * * 1) If there is only one linkEA entry, then trust it as long as the PFID * in the linkEA entry is valid. * * 2) If there are multiple linkEA entries, then try to find the linkEA * that matches the ".." name entry. If found, then all other entries * are invalid; otherwise, it is quite possible that the ".." name entry * is corrupted. Under such case, the LFSCK will rebuild the ".." name * entry according to the first valid linkEA entry (both the parent and * the name entry should exist). * * 3) If the directory object has no (valid) linkEA entry, then the * directory object will be handled as pure orphan and inserted * in the .lustre/lost+found/MDTxxxx/ with the name: * ${self_FID}-${PFID}-D-${conflict_version} * * \param[in] env pointer to the thread context * \param[in] com pointer to the lfsck component * \param[in] child pointer to the directory object to be handled * \param[in] flags to indicate the specical checking on the @child * * \retval positive number for repaired cases * \retval 0 if nothing to be repaired * \retval negative error number on failure */ static int lfsck_namespace_double_scan_dir(const struct lu_env *env, struct lfsck_component *com, struct dt_object *child, __u8 flags) { struct lfsck_thread_info *info = lfsck_env_info(env); const struct lu_fid *cfid = lfsck_dto2fid(child); struct lu_fid *pfid = &info->lti_fid2; struct lfsck_namespace *ns = com->lc_file_ram; struct lfsck_instance *lfsck = com->lc_lfsck; struct lustre_handle lh = { 0 }; struct linkea_data ldata = { NULL }; bool unknown = false; bool lpf = false; bool retry = false; enum lfsck_namespace_inconsistency_type type = LNIT_BAD_LINKEA; int rc = 0; ENTRY; LASSERT(!dt_object_remote(child)); if (flags & LNTF_UNCERTAIN_LMV) { if (flags & LNTF_RECHECK_NAME_HASH) { rc = lfsck_namespace_scan_shard(env, com, child); if (rc < 0) RETURN(rc); ns->ln_striped_shards_scanned++; } else { ns->ln_striped_shards_skipped++; } } flags &= ~(LNTF_RECHECK_NAME_HASH | LNTF_UNCERTAIN_LMV); if (flags == 0) RETURN(0); if (flags & (LNTF_CHECK_LINKEA | LNTF_CHECK_PARENT) && !(lfsck->li_bookmark_ram.lb_param & LPF_ALL_TGT)) { CDEBUG(D_LFSCK, "%s: some MDT(s) maybe NOT take part in the the namespace LFSCK, then the LFSCK cannot guarantee all the name entries have been verified in first-stage scanning. So have to skip orphan related handling for the directory object "DFID" with remote name entry\n", lfsck_lfsck2name(lfsck), PFID(cfid)); RETURN(0); } if (unlikely(!dt_try_as_dir(env, child))) GOTO(out, rc = -ENOTDIR); /* We only take ldlm lock on the @child when required. When the * logic comes here for the first time, it is always false. */ if (0) { lock: rc = lfsck_ibits_lock(env, lfsck, child, &lh, MDS_INODELOCK_UPDATE | MDS_INODELOCK_XATTR, LCK_EX); if (rc != 0) GOTO(out, rc); } dt_read_lock(env, child, 0); if (unlikely(lfsck_is_dead_obj(child))) { dt_read_unlock(env, child); GOTO(out, rc = 0); } rc = dt_lookup_dir(env, child, dotdot, pfid); if (rc != 0) { if (rc != -ENOENT && rc != -ENODATA && rc != -EINVAL) { dt_read_unlock(env, child); GOTO(out, rc); } if (!lustre_handle_is_used(&lh)) { dt_read_unlock(env, child); goto lock; } fid_zero(pfid); } else if (lfsck->li_lpf_obj != NULL && lu_fid_eq(pfid, lfsck_dto2fid(lfsck->li_lpf_obj))) { lpf = true; } else if (unlikely(!fid_is_sane(pfid))) { fid_zero(pfid); } rc = lfsck_links_read(env, child, &ldata); dt_read_unlock(env, child); if (rc != 0) { if (rc != -ENODATA && rc != -EINVAL) GOTO(out, rc); if (!lustre_handle_is_used(&lh)) goto lock; if (rc == -EINVAL && !fid_is_zero(pfid)) { /* Remove the corrupted linkEA. */ rc = lfsck_namespace_links_remove(env, com, child); if (rc == 0) /* Here, because of the crashed linkEA, we * cannot know whether there is some parent * that references the child directory via * some name entry or not. So keep it there, * when the LFSCK run next time, if there is * some parent that references this object, * then the LFSCK can rebuild the linkEA; * otherwise, this object will be handled * as orphan as above. */ unknown = true; } else { /* 1. If we have neither ".." nor linkEA, * then it is an orphan. * * 2. If we only have the ".." name entry, * but no parent references this child * directory, then handle it as orphan. */ lfsck_ibits_unlock(&lh, LCK_EX); type = LNIT_MUL_REF; /* If the LFSCK is marked as LF_INCOMPLETE, * then means some MDT has ever tried to * verify some remote MDT-object that resides * on this MDT, but this MDT failed to respond * such request. So means there may be some * remote name entry on other MDT that * references this object with another name, * so we cannot know whether this linkEA is * valid or not. So keep it there and maybe * resolved when next LFSCK run. */ if (ns->ln_flags & LF_INCOMPLETE) GOTO(out, rc = 0); snprintf(info->lti_tmpbuf, sizeof(info->lti_tmpbuf), "-"DFID, PFID(pfid)); rc = lfsck_namespace_insert_orphan(env, com, child, info->lti_tmpbuf, "D", NULL); } GOTO(out, rc); } /* rc != 0 */ linkea_first_entry(&ldata); /* This is the most common case: the object has unique linkEA entry. */ if (ldata.ld_leh->leh_reccount == 1) { rc = lfsck_namespace_dsd_single(env, com, child, pfid, &ldata, &lh, &type, &retry, &unknown); if (retry) { LASSERT(!lustre_handle_is_used(&lh)); retry = false; goto lock; } GOTO(out, rc); } if (!lustre_handle_is_used(&lh)) goto lock; if (unlikely(ldata.ld_leh->leh_reccount == 0)) { rc = lfsck_namespace_dsd_orphan(env, com, child, pfid, &lh, &type); GOTO(out, rc); } /* When we come here, the cases usually like that: * 1) The directory object has a corrupted linkEA entry. During the * first-stage scanning, the LFSCK cannot know such corruption, * then it appends the right linkEA entry according to the found * name entry after the bad one. * * 2) The directory object has a right linkEA entry. During the * first-stage scanning, the LFSCK finds some bad name entry, * but the LFSCK cannot aware that at that time, then it adds * the bad linkEA entry for further processing. */ rc = lfsck_namespace_dsd_multiple(env, com, child, pfid, &ldata, &lh, &type, lpf, &unknown); GOTO(out, rc); out: lfsck_ibits_unlock(&lh, LCK_EX); if (rc > 0) { switch (type) { case LNIT_BAD_LINKEA: ns->ln_linkea_repaired++; break; case LNIT_UNMATCHED_PAIRS: ns->ln_unmatched_pairs_repaired++; break; case LNIT_MUL_REF: ns->ln_mul_ref_repaired++; break; default: break; } } if (unknown) ns->ln_unknown_inconsistency++; return rc; } static inline bool lfsck_namespace_linkea_stale_overflow(struct linkea_data *ldata, struct lfsck_namespace *ns) { /* Both the leh_overflow_time and ln_time_latest_reset are * local time based, so need NOT to care about clock drift * among the servers. */ return ldata->ld_leh->leh_overflow_time && ldata->ld_leh->leh_overflow_time < ns->ln_time_latest_reset; } /** * Clear the object's linkEA overflow timestamp. * * If the MDT-object has too many hard links as to the linkEA cannot hold * all of them, then overflow timestamp will be set in the linkEA header. * If some hard links are removed after that, then it is possible to hold * other missed linkEA entries. If the namespace LFSCK have added all the * related linkEA entries, then it will remove the overflow timestamp. * * \param[in] env pointer to the thread context * \param[in] com pointer to the lfsck component * \param[in] ldata pointer to the linkEA data for the given @obj * \param[in] obj pointer to the dt_object to be handled * * \retval positive number for repaired cases * \retval 0 if nothing to be repaired * \retval negative error number on failure */ static int lfsck_namespace_linkea_clear_overflow(const struct lu_env *env, struct lfsck_component *com, struct linkea_data *ldata, struct dt_object *obj) { struct lfsck_namespace *ns = com->lc_file_ram; struct lfsck_instance *lfsck = com->lc_lfsck; struct dt_device *dev = lfsck_obj2dev(obj); struct thandle *th = NULL; struct lustre_handle lh = { 0 }; struct lu_buf linkea_buf; int rc = 0; ENTRY; LASSERT(!dt_object_remote(obj)); rc = lfsck_ibits_lock(env, lfsck, obj, &lh, MDS_INODELOCK_UPDATE, LCK_PW); if (rc != 0) GOTO(log, rc); th = dt_trans_create(env, dev); if (IS_ERR(th)) GOTO(log, rc = PTR_ERR(th)); rc = dt_declare_xattr_set(env, obj, lfsck_buf_get_const(env, NULL, MAX_LINKEA_SIZE), XATTR_NAME_LINK, 0, th); if (rc != 0) GOTO(stop, rc); rc = dt_trans_start_local(env, dev, th); if (rc != 0) GOTO(stop, rc); dt_write_lock(env, obj, 0); rc = lfsck_links_read(env, obj, ldata); if (rc != 0) GOTO(unlock, rc); if (unlikely(!lfsck_namespace_linkea_stale_overflow(ldata, ns))) GOTO(unlock, rc = 0); ldata->ld_leh->leh_overflow_time = 0; if (lfsck->li_bookmark_ram.lb_param & LPF_DRYRUN) GOTO(unlock, rc = 1); /* If all known entries are in the linkEA, then the 'leh_reccount' * should NOT be zero. */ LASSERT(ldata->ld_leh->leh_reccount > 0); lfsck_buf_init(&linkea_buf, ldata->ld_buf->lb_buf, ldata->ld_leh->leh_len); rc = dt_xattr_set(env, obj, &linkea_buf, XATTR_NAME_LINK, 0, th); if (unlikely(rc == -ENOSPC)) rc = 0; else if (!rc) rc = 1; GOTO(unlock, rc); unlock: dt_write_unlock(env, obj); stop: dt_trans_stop(env, dev, th); log: lfsck_ibits_unlock(&lh, LCK_PW); CDEBUG(D_LFSCK, "%s: clear linkea overflow timestamp for the object " DFID": rc = %d\n", lfsck_lfsck2name(lfsck), PFID(lfsck_dto2fid(obj)), rc); return rc; } /** * Verify the object's agent entry. * * If the object claims to have agent entry but the linkEA does not contain * remote parent, then remove the agent entry. Otherwise, if the object has * no agent entry but its linkEA contains remote parent, then will generate * agent entry for it. * * \param[in] env pointer to the thread context * \param[in] com pointer to the lfsck component * \param[in] obj pointer to the dt_object to be handled * * \retval positive number for repaired cases * \retval 0 if nothing to be repaired * \retval negative error number on failure */ static int lfsck_namespace_check_agent_entry(const struct lu_env *env, struct lfsck_component *com, struct dt_object *obj) { struct linkea_data ldata = { NULL }; struct lfsck_thread_info *info = lfsck_env_info(env); struct lfsck_namespace *ns = com->lc_file_ram; struct lfsck_instance *lfsck = com->lc_lfsck; struct lu_fid *pfid = &info->lti_fid2; struct lu_name *cname = &info->lti_name; struct lu_seq_range *range = &info->lti_range; struct seq_server_site *ss = lfsck_dev_site(lfsck); __u32 idx = lfsck_dev_idx(lfsck); int rc; bool remote = false; ENTRY; if (!(lfsck->li_bookmark_ram.lb_param & LPF_ALL_TGT)) RETURN(0); rc = lfsck_links_read_with_rec(env, obj, &ldata); if (rc == -ENOENT || rc == -ENODATA) RETURN(0); if (rc && rc != -EINVAL) GOTO(out, rc); /* We check the agent entry again after verifying the linkEA * successfully. So invalid linkEA should be dryrun mode. */ if (rc == -EINVAL || unlikely(!ldata.ld_leh->leh_reccount)) RETURN(0); linkea_first_entry(&ldata); while (ldata.ld_lee != NULL && !remote) { linkea_entry_unpack(ldata.ld_lee, &ldata.ld_reclen, cname, pfid); if (!linkea_entry_is_valid(&ldata, cname, pfid)) GOTO(out, rc = 0); fld_range_set_mdt(range); rc = fld_server_lookup(env, ss->ss_server_fld, fid_seq(pfid), range); if (rc) GOTO(out, rc = (rc == -ENOENT ? 0 : rc)); if (range->lsr_index != idx) remote = true; else linkea_next_entry(&ldata); } if ((lu_object_has_agent_entry(&obj->do_lu) && !remote) || (!lu_object_has_agent_entry(&obj->do_lu) && remote)) { struct dt_device *dev = lfsck_obj2dev(obj); struct linkea_data ldata2 = { NULL }; struct lustre_handle lh = { 0 }; struct lu_buf linkea_buf; struct thandle *handle; if (lfsck->li_bookmark_ram.lb_param & LPF_DRYRUN) GOTO(out, rc = 1); rc = lfsck_ibits_lock(env, lfsck, obj, &lh, MDS_INODELOCK_UPDATE | MDS_INODELOCK_XATTR, LCK_EX); if (rc) GOTO(out, rc); handle = dt_trans_create(env, dev); if (IS_ERR(handle)) GOTO(unlock, rc = PTR_ERR(handle)); lfsck_buf_init(&linkea_buf, ldata.ld_buf->lb_buf, ldata.ld_leh->leh_len); rc = dt_declare_xattr_set(env, obj, &linkea_buf, XATTR_NAME_LINK, LU_XATTR_REPLACE, handle); if (rc) GOTO(stop, rc); rc = dt_trans_start_local(env, dev, handle); if (rc) GOTO(stop, rc); dt_write_lock(env, obj, 0); rc = lfsck_links_read2_with_rec(env, obj, &ldata2); if (rc) { if (rc == -ENOENT || rc == -ENODATA) rc = 0; GOTO(unlock2, rc); } /* If someone changed linkEA by race, then the agent * entry will be updated by lower layer automatically. */ if (ldata.ld_leh->leh_len != ldata2.ld_leh->leh_len || memcmp(ldata.ld_buf->lb_buf, ldata2.ld_buf->lb_buf, ldata.ld_leh->leh_len) != 0) GOTO(unlock2, rc = 0); rc = dt_xattr_set(env, obj, &linkea_buf, XATTR_NAME_LINK, LU_XATTR_REPLACE, handle); if (!rc) rc = 1; GOTO(unlock2, rc); unlock2: dt_write_unlock(env, obj); stop: dt_trans_stop(env, dev, handle); unlock: lfsck_ibits_unlock(&lh, LCK_EX); } GOTO(out, rc); out: if (rc > 0) ns->ln_agent_entries_repaired++; if (rc) CDEBUG(D_LFSCK, "%s: repair agent entry for "DFID": rc = %d\n", lfsck_lfsck2name(lfsck), PFID(lfsck_dto2fid(obj)), rc); return rc; } /** * Double scan the MDT-object for namespace LFSCK. * * If the MDT-object contains invalid or repeated linkEA entries, then drop * those entries from the linkEA; if the linkEA becomes empty or the object * has no linkEA, then it is an orphan and will be added into the directory * .lustre/lost+found/MDTxxxx/; if the remote parent is lost, then recreate * the remote parent; if the name entry corresponding to some linkEA entry * is lost, then add the name entry back to the namespace. * * \param[in] env pointer to the thread context * \param[in] com pointer to the lfsck component * \param[in] child pointer to the dt_object to be handled * \param[in] flags some hints to indicate how the @child should be handled * * \retval positive number for repaired cases * \retval 0 if nothing to be repaired * \retval negative error number on failure */ static int lfsck_namespace_double_scan_one(const struct lu_env *env, struct lfsck_component *com, struct dt_object *child, __u8 flags) { struct lfsck_thread_info *info = lfsck_env_info(env); struct lu_attr *la = &info->lti_la; struct lu_name *cname = &info->lti_name; struct lu_fid *pfid = &info->lti_fid; struct lu_fid *cfid = &info->lti_fid2; struct lfsck_instance *lfsck = com->lc_lfsck; struct lfsck_namespace *ns = com->lc_file_ram; struct dt_object *parent = NULL; struct linkea_data ldata = { NULL }; bool repaired = false; int count = 0; int rc; ENTRY; dt_read_lock(env, child, 0); if (unlikely(lfsck_is_dead_obj(child))) { dt_read_unlock(env, child); RETURN(0); } if (S_ISDIR(lfsck_object_type(child))) { dt_read_unlock(env, child); rc = lfsck_namespace_double_scan_dir(env, com, child, flags); if (!rc && flags & LNTF_CHECK_AGENT_ENTRY) rc = lfsck_namespace_check_agent_entry(env, com, child); RETURN(rc); } rc = lfsck_links_read(env, child, &ldata); dt_read_unlock(env, child); if (rc == -EINVAL) { struct lustre_handle lh = { 0 }; rc = lfsck_ibits_lock(env, com->lc_lfsck, child, &lh, MDS_INODELOCK_UPDATE | MDS_INODELOCK_XATTR, LCK_EX); if (rc == 0) { rc = lfsck_namespace_links_remove(env, com, child); lfsck_ibits_unlock(&lh, LCK_EX); } GOTO(out, rc); } if (rc != 0) GOTO(out, rc); if (!(ns->ln_flags & LF_INCOMPLETE) && unlikely(lfsck_namespace_linkea_stale_overflow(&ldata, ns))) { rc = lfsck_namespace_linkea_clear_overflow(env, com, &ldata, child); if (rc < 0) GOTO(out, rc); if (rc > 0) ns->ln_linkea_overflow_cleared++; } linkea_first_entry(&ldata); while (ldata.ld_lee != NULL) { rc = lfsck_namespace_unpack_linkea_entry(&ldata, cname, pfid, info->lti_key, sizeof(info->lti_key)); /* Invalid PFID in the linkEA entry. */ if (rc != 0) { rc = lfsck_namespace_shrink_linkea(env, com, child, &ldata, cname, pfid, true); if (rc < 0) GOTO(out, rc); if (rc > 0) repaired = true; continue; } rc = lfsck_namespace_filter_linkea_entry(&ldata, cname, pfid, false); /* Found repeated linkEA entries */ if (rc > 0) { rc = lfsck_namespace_shrink_linkea(env, com, child, &ldata, cname, pfid, false); if (rc < 0) GOTO(out, rc); if (rc == 0) continue; repaired = true; /* fall through */ } parent = lfsck_object_find_bottom(env, lfsck, pfid); if (IS_ERR(parent)) { rc = PTR_ERR(parent); /* if @pfid doesn't have a valid OI mapping, it will * trigger OI scrub, and -ENONET is is returned if it's * remote, -EINPROGRESS if local. */ if ((rc == -ENOENT || rc == -EINPROGRESS) && ldata.ld_leh->leh_reccount > 1) rc = lfsck_namespace_shrink_linkea(env, com, child, &ldata, cname, pfid, true); GOTO(out, rc); } if (!dt_object_exists(parent)) { lost_parent: if (ldata.ld_leh->leh_reccount > 1) { /* If it is NOT the last linkEA entry, then * there is still other chance to make the * child to be visible via other parent, then * remove this linkEA entry. */ rc = lfsck_namespace_shrink_linkea(env, com, child, &ldata, cname, pfid, true); } else { /* If the LFSCK is marked as LF_INCOMPLETE, * then means some MDT has ever tried to * verify some remote MDT-object that resides * on this MDT, but this MDT failed to respond * such request. So means there may be some * remote name entry on other MDT that * references this object with another name, * so we cannot know whether this linkEA is * valid or not. So keep it there and maybe * resolved when next LFSCK run. */ if (ns->ln_flags & LF_INCOMPLETE) { lfsck_object_put(env, parent); GOTO(out, rc = 0); } /* Create the lost parent as an orphan. */ rc = lfsck_namespace_create_orphan_dir(env, com, parent, NULL); if (rc < 0) { lfsck_object_put(env, parent); GOTO(out, rc); } if (rc > 0) repaired = true; /* Add the missing name entry to the parent. */ rc = lfsck_namespace_insert_normal(env, com, parent, child, cname); if (unlikely(rc == -EEXIST)) /* Unfortunately, someone reused the * name under the parent by race. So we * have to remove the linkEA entry from * current child object. It means that * the LFSCK cannot recover the system * totally back to its original status, * but it is necessary to make the * current system to be consistent. */ rc = lfsck_namespace_shrink_linkea(env, com, child, &ldata, cname, pfid, true); else linkea_next_entry(&ldata); } lfsck_object_put(env, parent); if (rc < 0) GOTO(out, rc); if (rc > 0) repaired = true; continue; } /* !dt_object_exists(parent) */ /* The linkEA entry with bad parent will be removed. */ if (unlikely(!dt_try_as_dir(env, parent))) { lfsck_object_put(env, parent); rc = lfsck_namespace_shrink_linkea(env, com, child, &ldata, cname, pfid, true); if (rc < 0) GOTO(out, rc); if (rc > 0) repaired = true; continue; } rc = dt_lookup_dir(env, parent, cname->ln_name, cfid); if (rc != 0 && rc != -ENOENT) { lfsck_object_put(env, parent); GOTO(out, rc); } if (rc == 0) { if (lu_fid_eq(cfid, lfsck_dto2fid(child))) { /* It is the most common case that we * find the name entry corresponding * to the linkEA entry. */ lfsck_object_put(env, parent); linkea_next_entry(&ldata); } else { /* The name entry references another * MDT-object that may be created by * the LFSCK for repairing dangling * name entry. Try to replace it. */ rc = lfsck_namespace_replace_cond(env, com, parent, child, cfid, cname); lfsck_object_put(env, parent); if (rc < 0) GOTO(out, rc); if (rc > 0) { repaired = true; linkea_next_entry(&ldata); } else { rc = lfsck_namespace_shrink_linkea(env, com, child, &ldata, cname, pfid, true); if (rc < 0) GOTO(out, rc); if (rc > 0) repaired = true; } } continue; } /* The following handles -ENOENT case */ rc = dt_attr_get(env, child, la); if (rc != 0) GOTO(out, rc); /* If there is no name entry in the parent dir and the object * link count is fewer than the linkea entries count, then the * linkea entry should be removed. */ if (ldata.ld_leh->leh_reccount > la->la_nlink) { rc = lfsck_namespace_shrink_linkea_cond(env, com, parent, child, &ldata, cname, pfid); lfsck_object_put(env, parent); if (rc < 0) GOTO(out, rc); if (rc > 0) repaired = true; continue; } /* If the LFSCK is marked as LF_INCOMPLETE, then means some * MDT has ever tried to verify some remote MDT-object that * resides on this MDT, but this MDT failed to respond such * request. So means there may be some remote name entry on * other MDT that references this object with another name, * so we cannot know whether this linkEA is valid or not. * So keep it there and maybe resolved when next LFSCK run. */ if (ns->ln_flags & LF_INCOMPLETE) { lfsck_object_put(env, parent); GOTO(out, rc = 0); } rc = lfsck_namespace_check_name(env, lfsck, parent, child, cname); if (rc == -ENOENT) goto lost_parent; if (rc < 0) { lfsck_object_put(env, parent); GOTO(out, rc); } /* It is an invalid name entry, drop it. */ if (unlikely(rc > 0)) { lfsck_object_put(env, parent); rc = lfsck_namespace_shrink_linkea(env, com, child, &ldata, cname, pfid, true); if (rc < 0) GOTO(out, rc); if (rc > 0) repaired = true; continue; } /* Add the missing name entry back to the namespace. */ rc = lfsck_namespace_insert_normal(env, com, parent, child, cname); if (unlikely(rc == -ESTALE)) /* It may happen when the remote object has been * removed, but the local MDT is not aware of that. */ goto lost_parent; if (unlikely(rc == -EEXIST)) /* Unfortunately, someone reused the name under the * parent by race. So we have to remove the linkEA * entry from current child object. It means that the * LFSCK cannot recover the system totally back to * its original status, but it is necessary to make * the current system to be consistent. * * It also may be because of the LFSCK found some * internal status of create operation. Under such * case, nothing to be done. */ rc = lfsck_namespace_shrink_linkea_cond(env, com, parent, child, &ldata, cname, pfid); else linkea_next_entry(&ldata); lfsck_object_put(env, parent); if (rc < 0) GOTO(out, rc); if (rc > 0) repaired = true; } GOTO(out, rc = 0); out: if (rc < 0 && rc != -ENODATA) return rc; if (rc == 0 && ldata.ld_leh != NULL) count = ldata.ld_leh->leh_reccount; if (count == 0) { /* If the LFSCK is marked as LF_INCOMPLETE, then means some * MDT has ever tried to verify some remote MDT-object that * resides on this MDT, but this MDT failed to respond such * request. So means there may be some remote name entry on * other MDT that references this object with another name, * so we cannot know whether this linkEA is valid or not. * So keep it there and maybe resolved when next LFSCK run. */ if (!(ns->ln_flags & LF_INCOMPLETE) && (ldata.ld_leh == NULL || !ldata.ld_leh->leh_overflow_time)) { /* If the child becomes orphan, then insert it into * the global .lustre/lost+found/MDTxxxx directory. */ rc = lfsck_namespace_insert_orphan(env, com, child, "", "O", &count); if (rc < 0) return rc; if (rc > 0) { ns->ln_mul_ref_repaired++; repaired = true; } } } else { rc = dt_attr_get(env, child, la); if (rc != 0) return rc; if (la->la_nlink != 0 && la->la_nlink != count) { if (unlikely(!S_ISREG(lfsck_object_type(child)) && !S_ISLNK(lfsck_object_type(child)))) { CDEBUG(D_LFSCK, "%s: namespace LFSCK finds " "the object "DFID"'s nlink count %d " "does not match linkEA count %d, " "type %o, skip it.\n", lfsck_lfsck2name(lfsck), PFID(lfsck_dto2fid(child)), la->la_nlink, count, lfsck_object_type(child)); } else if (la->la_nlink < count && likely(!ldata.ld_leh->leh_overflow_time)) { rc = lfsck_namespace_repair_nlink(env, com, child, la); if (rc > 0) { ns->ln_objs_nlink_repaired++; rc = 0; } } } } if (repaired) { if (la->la_nlink > 1) ns->ln_mul_linked_repaired++; if (rc == 0) rc = 1; } if (!rc && flags & LNTF_CHECK_AGENT_ENTRY) rc = lfsck_namespace_check_agent_entry(env, com, child); return rc; } static void lfsck_namespace_dump_statistics(struct seq_file *m, struct lfsck_namespace *ns, __u64 checked_phase1, __u64 checked_phase2, time64_t time_phase1, time64_t time_phase2, bool dryrun) { const char *postfix = dryrun ? "inconsistent" : "repaired"; seq_printf(m, "checked_phase1: %llu\n" "checked_phase2: %llu\n" "%s_phase1: %llu\n" "%s_phase2: %llu\n" "failed_phase1: %llu\n" "failed_phase2: %llu\n" "directories: %llu\n" "dirent_%s: %llu\n" "linkea_%s: %llu\n" "nlinks_%s: %llu\n" "multiple_linked_checked: %llu\n" "multiple_linked_%s: %llu\n" "unknown_inconsistency: %llu\n" "unmatched_pairs_%s: %llu\n" "dangling_%s: %llu\n" "multiple_referenced_%s: %llu\n" "bad_file_type_%s: %llu\n" "lost_dirent_%s: %llu\n" "local_lost_found_scanned: %llu\n" "local_lost_found_moved: %llu\n" "local_lost_found_skipped: %llu\n" "local_lost_found_failed: %llu\n" "striped_dirs_scanned: %llu\n" "striped_dirs_%s: %llu\n" "striped_dirs_failed: %llu\n" "striped_dirs_disabled: %llu\n" "striped_dirs_skipped: %llu\n" "striped_shards_scanned: %llu\n" "striped_shards_%s: %llu\n" "striped_shards_failed: %llu\n" "striped_shards_skipped: %llu\n" "name_hash_%s: %llu\n" "linkea_overflow_%s: %llu\n" "agent_entries_%s: %llu\n" "success_count: %u\n" "run_time_phase1: %lld seconds\n" "run_time_phase2: %lld seconds\n", checked_phase1, checked_phase2, dryrun ? "inconsistent" : "updated", ns->ln_items_repaired, dryrun ? "inconsistent" : "updated", ns->ln_objs_repaired_phase2, ns->ln_items_failed, ns->ln_objs_failed_phase2, ns->ln_dirs_checked, postfix, ns->ln_dirent_repaired, postfix, ns->ln_linkea_repaired, postfix, ns->ln_objs_nlink_repaired, ns->ln_mul_linked_checked, postfix, ns->ln_mul_linked_repaired, ns->ln_unknown_inconsistency, postfix, ns->ln_unmatched_pairs_repaired, postfix, ns->ln_dangling_repaired, postfix, ns->ln_mul_ref_repaired, postfix, ns->ln_bad_type_repaired, postfix, ns->ln_lost_dirent_repaired, ns->ln_local_lpf_scanned, ns->ln_local_lpf_moved, ns->ln_local_lpf_skipped, ns->ln_local_lpf_failed, ns->ln_striped_dirs_scanned, postfix, ns->ln_striped_dirs_repaired, ns->ln_striped_dirs_failed, ns->ln_striped_dirs_disabled, ns->ln_striped_dirs_skipped, ns->ln_striped_shards_scanned, postfix, ns->ln_striped_shards_repaired, ns->ln_striped_shards_failed, ns->ln_striped_shards_skipped, postfix, ns->ln_name_hash_repaired, dryrun ? "inconsistent" : "cleared", ns->ln_linkea_overflow_cleared, postfix, ns->ln_agent_entries_repaired, ns->ln_success_count, time_phase1, time_phase2); } static void lfsck_namespace_release_lmv(const struct lu_env *env, struct lfsck_component *com) { struct lfsck_instance *lfsck = com->lc_lfsck; struct lfsck_namespace *ns = com->lc_file_ram; while (!list_empty(&lfsck->li_list_lmv)) { struct lfsck_lmv_unit *llu; struct lfsck_lmv *llmv; llu = list_entry(lfsck->li_list_lmv.next, struct lfsck_lmv_unit, llu_link); llmv = &llu->llu_lmv; LASSERTF(atomic_read(&llmv->ll_ref) == 1, "still in using: %u\n", atomic_read(&llmv->ll_ref)); ns->ln_striped_dirs_skipped++; lfsck_lmv_put(env, llmv); } } static int lfsck_namespace_check_for_double_scan(const struct lu_env *env, struct lfsck_component *com, struct dt_object *obj) { struct lu_attr *la = &lfsck_env_info(env)->lti_la; int rc; rc = dt_attr_get(env, obj, la); if (rc != 0) return rc; /* zero-linkEA object may be orphan, but it also maybe because * of upgrading. Currently, we cannot record it for double scan. * Because it may cause the LFSCK trace file to be too large. */ /* "la_ctime" == 1 means that it has ever been removed from * backend /lost+found directory but not been added back to * the normal namespace yet. */ if ((S_ISREG(lfsck_object_type(obj)) && la->la_nlink > 1) || unlikely(la->la_ctime == 1)) rc = lfsck_namespace_trace_update(env, com, lfsck_dto2fid(obj), LNTF_CHECK_LINKEA, true); return rc; } /* namespace APIs */ static int lfsck_namespace_reset(const struct lu_env *env, struct lfsck_component *com, bool init) { struct lfsck_instance *lfsck = com->lc_lfsck; struct lfsck_namespace *ns = com->lc_file_ram; struct lfsck_assistant_data *lad = com->lc_data; struct dt_object *root; int rc; ENTRY; root = dt_locate(env, lfsck->li_bottom, &lfsck->li_local_root_fid); if (IS_ERR(root)) GOTO(log, rc = PTR_ERR(root)); if (unlikely(!dt_try_as_dir(env, root))) GOTO(put, rc = -ENOTDIR); down_write(&com->lc_sem); if (init) { memset(ns, 0, sizeof(*ns)); } else { __u32 count = ns->ln_success_count; time64_t last_time = ns->ln_time_last_complete; memset(ns, 0, sizeof(*ns)); ns->ln_success_count = count; ns->ln_time_last_complete = last_time; } ns->ln_magic = LFSCK_NAMESPACE_MAGIC; ns->ln_status = LS_INIT; ns->ln_time_latest_reset = ktime_get_real_seconds(); rc = lfsck_load_one_trace_file(env, com, root, &com->lc_obj, &dt_lfsck_namespace_features, LFSCK_NAMESPACE, true); if (rc) GOTO(out, rc); rc = lfsck_load_sub_trace_files(env, com, &dt_lfsck_namespace_features, LFSCK_NAMESPACE, true); if (rc != 0) GOTO(out, rc); clear_bit(LAD_INCOMPLETE, &lad->lad_flags); CFS_RESET_BITMAP(lad->lad_bitmap); rc = lfsck_namespace_store(env, com); GOTO(out, rc); out: up_write(&com->lc_sem); put: lfsck_object_put(env, root); log: CDEBUG(D_LFSCK, "%s: namespace LFSCK reset: rc = %d\n", lfsck_lfsck2name(lfsck), rc); return rc; } static void lfsck_namespace_fail(const struct lu_env *env, struct lfsck_component *com, bool new_checked) { struct lfsck_namespace *ns = com->lc_file_ram; down_write(&com->lc_sem); if (new_checked) com->lc_new_checked++; lfsck_namespace_record_failure(env, com->lc_lfsck, ns); up_write(&com->lc_sem); } static void lfsck_namespace_close_dir(const struct lu_env *env, struct lfsck_component *com) { struct lfsck_namespace *ns = com->lc_file_ram; struct lfsck_assistant_data *lad = com->lc_data; struct lfsck_assistant_object *lso = NULL; struct lfsck_instance *lfsck = com->lc_lfsck; struct lfsck_lmv *llmv = lfsck->li_lmv; struct lfsck_namespace_req *lnr; struct lu_attr *la = &lfsck_env_info(env)->lti_la2; __u32 size = sizeof(*lnr) + LFSCK_TMPBUF_LEN; int rc; bool wakeup = false; ENTRY; if (llmv == NULL) RETURN_EXIT; rc = dt_attr_get(env, lfsck->li_obj_dir, la); if (rc) RETURN_EXIT; OBD_ALLOC(lnr, size); if (lnr == NULL) { ns->ln_striped_dirs_skipped++; RETURN_EXIT; } lso = lfsck_assistant_object_init(env, lfsck_dto2fid(lfsck->li_obj_dir), la, lfsck->li_pos_current.lp_oit_cookie, true); if (IS_ERR(lso)) { OBD_FREE(lnr, size); ns->ln_striped_dirs_skipped++; RETURN_EXIT; } /* Generate a dummy request to indicate that all shards' name entry * in this striped directory has been scanned for the first time. */ INIT_LIST_HEAD(&lnr->lnr_lar.lar_list); lnr->lnr_lar.lar_parent = lso; lnr->lnr_lmv = lfsck_lmv_get(llmv); lnr->lnr_fid = *lfsck_dto2fid(lfsck->li_obj_dir); lnr->lnr_dir_cookie = MDS_DIR_END_OFF; lnr->lnr_size = size; lnr->lnr_type = lso->lso_attr.la_mode; spin_lock(&lad->lad_lock); if (lad->lad_assistant_status < 0 || unlikely(!thread_is_running(&lfsck->li_thread) || !thread_is_running(&lad->lad_thread))) { spin_unlock(&lad->lad_lock); lfsck_namespace_assistant_req_fini(env, &lnr->lnr_lar); ns->ln_striped_dirs_skipped++; RETURN_EXIT; } list_add_tail(&lnr->lnr_lar.lar_list, &lad->lad_req_list); if (lad->lad_prefetched == 0) wakeup = true; lad->lad_prefetched++; spin_unlock(&lad->lad_lock); if (wakeup) wake_up(&lad->lad_thread.t_ctl_waitq); EXIT; } static int lfsck_namespace_open_dir(const struct lu_env *env, struct lfsck_component *com) { struct lfsck_instance *lfsck = com->lc_lfsck; struct lfsck_namespace *ns = com->lc_file_ram; struct lfsck_lmv *llmv = lfsck->li_lmv; int rc = 0; ENTRY; if (llmv == NULL) RETURN(0); if (llmv->ll_lmv_master) { struct lmv_mds_md_v1 *lmv = &llmv->ll_lmv; if (lmv->lmv_master_mdt_index != lfsck_dev_idx(lfsck)) { lmv->lmv_master_mdt_index = lfsck_dev_idx(lfsck); ns->ln_flags |= LF_INCONSISTENT; llmv->ll_lmv_updated = 1; } } else { rc = lfsck_namespace_verify_stripe_slave(env, com, lfsck->li_obj_dir, llmv); } RETURN(rc > 0 ? 0 : rc); } static int lfsck_namespace_checkpoint(const struct lu_env *env, struct lfsck_component *com, bool init) { struct lfsck_instance *lfsck = com->lc_lfsck; struct lfsck_namespace *ns = com->lc_file_ram; int rc; if (!init) { rc = lfsck_checkpoint_generic(env, com); if (rc != 0) goto log; } down_write(&com->lc_sem); if (init) { ns->ln_pos_latest_start = lfsck->li_pos_checkpoint; } else { ns->ln_pos_last_checkpoint = lfsck->li_pos_checkpoint; ns->ln_run_time_phase1 += ktime_get_seconds() - lfsck->li_time_last_checkpoint; ns->ln_time_last_checkpoint = ktime_get_real_seconds(); ns->ln_items_checked += com->lc_new_checked; com->lc_new_checked = 0; } rc = lfsck_namespace_store(env, com); up_write(&com->lc_sem); log: CDEBUG(D_LFSCK, "%s: namespace LFSCK checkpoint at the pos [%llu" ", "DFID", %#llx], status = %d: rc = %d\n", lfsck_lfsck2name(lfsck), lfsck->li_pos_current.lp_oit_cookie, PFID(&lfsck->li_pos_current.lp_dir_parent), lfsck->li_pos_current.lp_dir_cookie, ns->ln_status, rc); return rc > 0 ? 0 : rc; } static int lfsck_namespace_prep(const struct lu_env *env, struct lfsck_component *com, struct lfsck_start_param *lsp) { struct lfsck_instance *lfsck = com->lc_lfsck; struct lfsck_namespace *ns = com->lc_file_ram; struct lfsck_position *pos = &com->lc_pos_start; int rc; rc = lfsck_namespace_load_bitmap(env, com); if (rc != 0 || ns->ln_status == LS_COMPLETED) { rc = lfsck_namespace_reset(env, com, false); if (rc == 0) rc = lfsck_set_param(env, lfsck, lsp->lsp_start, true); if (rc != 0) { CDEBUG(D_LFSCK, "%s: namespace LFSCK prep failed: " "rc = %d\n", lfsck_lfsck2name(lfsck), rc); return rc; } } down_write(&com->lc_sem); ns->ln_time_latest_start = ktime_get_real_seconds(); spin_lock(&lfsck->li_lock); if (ns->ln_flags & LF_SCANNED_ONCE) { if (!lfsck->li_drop_dryrun || lfsck_pos_is_zero(&ns->ln_pos_first_inconsistent)) { ns->ln_status = LS_SCANNING_PHASE2; list_move_tail(&com->lc_link, &lfsck->li_list_double_scan); if (!list_empty(&com->lc_link_dir)) list_del_init(&com->lc_link_dir); lfsck_pos_set_zero(pos); } else { ns->ln_status = LS_SCANNING_PHASE1; ns->ln_run_time_phase1 = 0; ns->ln_run_time_phase2 = 0; ns->ln_items_checked = 0; ns->ln_items_repaired = 0; ns->ln_items_failed = 0; ns->ln_dirs_checked = 0; ns->ln_objs_checked_phase2 = 0; ns->ln_objs_repaired_phase2 = 0; ns->ln_objs_failed_phase2 = 0; ns->ln_objs_nlink_repaired = 0; ns->ln_dirent_repaired = 0; ns->ln_linkea_repaired = 0; ns->ln_mul_linked_checked = 0; ns->ln_mul_linked_repaired = 0; ns->ln_unknown_inconsistency = 0; ns->ln_unmatched_pairs_repaired = 0; ns->ln_dangling_repaired = 0; ns->ln_mul_ref_repaired = 0; ns->ln_bad_type_repaired = 0; ns->ln_lost_dirent_repaired = 0; ns->ln_striped_dirs_scanned = 0; ns->ln_striped_dirs_repaired = 0; ns->ln_striped_dirs_failed = 0; ns->ln_striped_dirs_disabled = 0; ns->ln_striped_dirs_skipped = 0; ns->ln_striped_shards_scanned = 0; ns->ln_striped_shards_repaired = 0; ns->ln_striped_shards_failed = 0; ns->ln_striped_shards_skipped = 0; ns->ln_name_hash_repaired = 0; fid_zero(&ns->ln_fid_latest_scanned_phase2); if (list_empty(&com->lc_link_dir)) list_add_tail(&com->lc_link_dir, &lfsck->li_list_dir); *pos = ns->ln_pos_first_inconsistent; } } else { ns->ln_status = LS_SCANNING_PHASE1; if (list_empty(&com->lc_link_dir)) list_add_tail(&com->lc_link_dir, &lfsck->li_list_dir); if (!lfsck->li_drop_dryrun || lfsck_pos_is_zero(&ns->ln_pos_first_inconsistent)) { *pos = ns->ln_pos_last_checkpoint; pos->lp_oit_cookie++; } else { *pos = ns->ln_pos_first_inconsistent; } } spin_unlock(&lfsck->li_lock); up_write(&com->lc_sem); rc = lfsck_start_assistant(env, com, lsp); CDEBUG(D_LFSCK, "%s: namespace LFSCK prep done, start pos [%llu, " DFID", %#llx]: rc = %d\n", lfsck_lfsck2name(lfsck), pos->lp_oit_cookie, PFID(&pos->lp_dir_parent), pos->lp_dir_cookie, rc); return rc; } static int lfsck_namespace_exec_oit(const struct lu_env *env, struct lfsck_component *com, struct dt_object *obj) { struct lfsck_thread_info *info = lfsck_env_info(env); struct lfsck_namespace *ns = com->lc_file_ram; struct lfsck_instance *lfsck = com->lc_lfsck; const struct lu_fid *fid = lfsck_dto2fid(obj); struct lu_fid *pfid = &info->lti_fid2; struct lu_name *cname = &info->lti_name; struct lu_seq_range *range = &info->lti_range; struct seq_server_site *ss = lfsck_dev_site(lfsck); struct linkea_data ldata = { NULL }; __u32 idx = lfsck_dev_idx(lfsck); struct lu_attr la = { .la_valid = 0 }; bool remote = false; int rc; ENTRY; rc = dt_attr_get(env, obj, &la); if (unlikely(rc || (la.la_valid & LA_FLAGS && la.la_flags & LUSTRE_ORPHAN_FL))) { CDEBUG(D_INFO, "%s: skip orphan "DFID", %llx/%x: rc = %d\n", lfsck_lfsck2name(lfsck), PFID(fid), la.la_valid, la.la_flags, rc); return rc; } rc = lfsck_links_read(env, obj, &ldata); if (rc == -ENOENT) GOTO(out, rc = 0); /* -EINVAL means crashed linkEA, should be verified. */ if (rc == -EINVAL) { rc = lfsck_namespace_trace_update(env, com, fid, LNTF_CHECK_LINKEA, true); if (rc == 0) { struct lustre_handle lh = { 0 }; rc = lfsck_ibits_lock(env, lfsck, obj, &lh, MDS_INODELOCK_UPDATE | MDS_INODELOCK_XATTR, LCK_EX); if (rc == 0) { rc = lfsck_namespace_links_remove(env, com, obj); lfsck_ibits_unlock(&lh, LCK_EX); } } GOTO(out, rc = (rc == -ENOENT ? 0 : rc)); } if (rc && rc != -ENODATA) GOTO(out, rc); if (rc == -ENODATA || unlikely(!ldata.ld_leh->leh_reccount)) { rc = lfsck_namespace_check_for_double_scan(env, com, obj); GOTO(out, rc); } linkea_first_entry(&ldata); while (ldata.ld_lee != NULL) { linkea_entry_unpack(ldata.ld_lee, &ldata.ld_reclen, cname, pfid); if (!fid_is_sane(pfid)) { rc = lfsck_namespace_trace_update(env, com, fid, LNTF_CHECK_PARENT, true); } else if (!linkea_entry_is_valid(&ldata, cname, pfid)) { GOTO(out, rc); } else { fld_range_set_mdt(range); rc = fld_server_lookup(env, ss->ss_server_fld, fid_seq(pfid), range); if ((rc == -ENOENT) || (!rc && range->lsr_index != idx)) { remote = true; break; } } if (rc) GOTO(out, rc); linkea_next_entry(&ldata); } if ((lu_object_has_agent_entry(&obj->do_lu) && !remote) || (!lu_object_has_agent_entry(&obj->do_lu) && remote)) { rc = lfsck_namespace_trace_update(env, com, fid, LNTF_CHECK_AGENT_ENTRY, true); if (rc) GOTO(out, rc); } /* Record multiple-linked object. */ if (ldata.ld_leh->leh_reccount > 1) { rc = lfsck_namespace_trace_update(env, com, fid, LNTF_CHECK_LINKEA, true); GOTO(out, rc); } if (remote) rc = lfsck_namespace_trace_update(env, com, fid, LNTF_CHECK_LINKEA, true); else rc = lfsck_namespace_check_for_double_scan(env, com, obj); GOTO(out, rc); out: down_write(&com->lc_sem); if (S_ISDIR(lfsck_object_type(obj))) ns->ln_dirs_checked++; if (rc != 0) lfsck_namespace_record_failure(env, com->lc_lfsck, ns); up_write(&com->lc_sem); return rc; } static int lfsck_namespace_exec_dir(const struct lu_env *env, struct lfsck_component *com, struct lfsck_assistant_object *lso, struct lu_dirent *ent, __u16 type) { struct lfsck_assistant_data *lad = com->lc_data; struct lfsck_instance *lfsck = com->lc_lfsck; struct lfsck_namespace_req *lnr; struct lfsck_bookmark *bk = &lfsck->li_bookmark_ram; struct ptlrpc_thread *mthread = &lfsck->li_thread; struct ptlrpc_thread *athread = &lad->lad_thread; bool wakeup = false; wait_event_idle(mthread->t_ctl_waitq, lad->lad_prefetched < bk->lb_async_windows || !thread_is_running(mthread) || !thread_is_running(athread)); if (unlikely(!thread_is_running(mthread) || !thread_is_running(athread))) return 0; if (unlikely(lfsck_is_dead_obj(lfsck->li_obj_dir))) return 0; lnr = lfsck_namespace_assistant_req_init(com->lc_lfsck, lso, ent, type); if (IS_ERR(lnr)) { struct lfsck_namespace *ns = com->lc_file_ram; lfsck_namespace_record_failure(env, com->lc_lfsck, ns); return PTR_ERR(lnr); } spin_lock(&lad->lad_lock); if (lad->lad_assistant_status < 0 || unlikely(!thread_is_running(mthread) || !thread_is_running(athread))) { spin_unlock(&lad->lad_lock); lfsck_namespace_assistant_req_fini(env, &lnr->lnr_lar); return lad->lad_assistant_status; } list_add_tail(&lnr->lnr_lar.lar_list, &lad->lad_req_list); if (lad->lad_prefetched == 0) wakeup = true; lad->lad_prefetched++; spin_unlock(&lad->lad_lock); if (wakeup) wake_up(&lad->lad_thread.t_ctl_waitq); down_write(&com->lc_sem); com->lc_new_checked++; up_write(&com->lc_sem); return 0; } static int lfsck_namespace_post(const struct lu_env *env, struct lfsck_component *com, int result, bool init) { struct lfsck_instance *lfsck = com->lc_lfsck; struct lfsck_namespace *ns = com->lc_file_ram; int rc; ENTRY; lfsck_post_generic(env, com, &result); down_write(&com->lc_sem); lfsck_namespace_release_lmv(env, com); spin_lock(&lfsck->li_lock); if (!init) ns->ln_pos_last_checkpoint = lfsck->li_pos_checkpoint; if (result > 0) { ns->ln_status = LS_SCANNING_PHASE2; ns->ln_flags |= LF_SCANNED_ONCE; ns->ln_flags &= ~LF_UPGRADE; list_del_init(&com->lc_link_dir); list_move_tail(&com->lc_link, &lfsck->li_list_double_scan); } else if (result == 0) { if (lfsck->li_status != 0) ns->ln_status = lfsck->li_status; else ns->ln_status = LS_STOPPED; if (ns->ln_status != LS_PAUSED) { list_del_init(&com->lc_link_dir); list_move_tail(&com->lc_link, &lfsck->li_list_idle); } } else { ns->ln_status = LS_FAILED; list_del_init(&com->lc_link_dir); list_move_tail(&com->lc_link, &lfsck->li_list_idle); } spin_unlock(&lfsck->li_lock); if (!init) { ns->ln_run_time_phase1 += ktime_get_seconds() - lfsck->li_time_last_checkpoint; ns->ln_time_last_checkpoint = ktime_get_real_seconds(); ns->ln_items_checked += com->lc_new_checked; com->lc_new_checked = 0; } rc = lfsck_namespace_store(env, com); up_write(&com->lc_sem); CDEBUG(D_LFSCK, "%s: namespace LFSCK post done: rc = %d\n", lfsck_lfsck2name(lfsck), rc); RETURN(rc); } static void lfsck_namespace_dump(const struct lu_env *env, struct lfsck_component *com, struct seq_file *m) { struct lfsck_instance *lfsck = com->lc_lfsck; struct lfsck_bookmark *bk = &lfsck->li_bookmark_ram; struct lfsck_namespace *ns = com->lc_file_ram; down_read(&com->lc_sem); seq_printf(m, "name: lfsck_namespace\n" "magic: %#x\n" "version: %d\n" "status: %s\n", ns->ln_magic, bk->lb_version, lfsck_status2name(ns->ln_status)); lfsck_bits_dump(m, ns->ln_flags, lfsck_flags_names, "flags"); lfsck_bits_dump(m, bk->lb_param, lfsck_param_names, "param"); lfsck_time_dump(m, ns->ln_time_last_complete, "last_completed"); lfsck_time_dump(m, ns->ln_time_latest_start, "latest_start"); lfsck_time_dump(m, ns->ln_time_last_checkpoint, "last_checkpoint"); lfsck_pos_dump(m, &ns->ln_pos_latest_start, "latest_start_position"); lfsck_pos_dump(m, &ns->ln_pos_last_checkpoint, "last_checkpoint_position"); lfsck_pos_dump(m, &ns->ln_pos_first_inconsistent, "first_failure_position"); if (ns->ln_status == LS_SCANNING_PHASE1) { struct lfsck_position pos; time64_t duration = ktime_get_seconds() - lfsck->li_time_last_checkpoint; u64 checked = ns->ln_items_checked + com->lc_new_checked; u64 speed = checked; u64 new_checked = com->lc_new_checked; time64_t rtime = ns->ln_run_time_phase1 + duration; if (duration != 0) new_checked = div64_s64(new_checked, duration); if (rtime != 0) speed = div64_s64(speed, rtime); lfsck_namespace_dump_statistics(m, ns, checked, 0, rtime, 0, bk->lb_param & LPF_DRYRUN); seq_printf(m, "average_speed_phase1: %llu items/sec\n" "average_speed_phase2: N/A\n" "average_speed_total: %llu items/sec\n" "real_time_speed_phase1: %llu items/sec\n" "real_time_speed_phase2: N/A\n", speed, speed, new_checked); if (likely(lfsck->li_di_oit)) { const struct dt_it_ops *iops = &lfsck->li_obj_oit->do_index_ops->dio_it; /* The low layer otable-based iteration position may NOT * exactly match the namespace-based directory traversal * cookie. Generally, it is not a serious issue. But the * caller should NOT make assumption on that. */ pos.lp_oit_cookie = iops->store(env, lfsck->li_di_oit); if (!lfsck->li_current_oit_processed) pos.lp_oit_cookie--; spin_lock(&lfsck->li_lock); if (lfsck->li_di_dir) { pos.lp_dir_cookie = lfsck->li_cookie_dir; if (pos.lp_dir_cookie >= MDS_DIR_END_OFF) { fid_zero(&pos.lp_dir_parent); pos.lp_dir_cookie = 0; } else { pos.lp_dir_parent = *lfsck_dto2fid(lfsck->li_obj_dir); } } else { fid_zero(&pos.lp_dir_parent); pos.lp_dir_cookie = 0; } spin_unlock(&lfsck->li_lock); } else { pos = ns->ln_pos_last_checkpoint; } lfsck_pos_dump(m, &pos, "current_position"); } else if (ns->ln_status == LS_SCANNING_PHASE2) { time64_t duration = ktime_get_seconds() - com->lc_time_last_checkpoint; __u64 checked = ns->ln_objs_checked_phase2 + com->lc_new_checked; __u64 speed1 = ns->ln_items_checked; __u64 speed2 = checked; __u64 speed0 = speed1 + speed2; __u64 new_checked = com->lc_new_checked; time64_t rtime = ns->ln_run_time_phase2 + duration; time64_t time0 = ns->ln_run_time_phase1 + rtime; if (duration != 0) new_checked = div64_s64(new_checked, duration); if (ns->ln_run_time_phase1 != 0) speed1 = div64_s64(speed1, ns->ln_run_time_phase1); else if (ns->ln_items_checked != 0) time0++; if (rtime != 0) speed2 = div64_s64(speed2, rtime); else if (checked != 0) time0++; if (time0 != 0) speed0 = div64_s64(speed0, time0); lfsck_namespace_dump_statistics(m, ns, ns->ln_items_checked, checked, ns->ln_run_time_phase1, rtime, bk->lb_param & LPF_DRYRUN); seq_printf(m, "average_speed_phase1: %llu items/sec\n" "average_speed_phase2: %llu objs/sec\n" "average_speed_total: %llu items/sec\n" "real_time_speed_phase1: N/A\n" "real_time_speed_phase2: %llu objs/sec\n" "current_position: "DFID"\n", speed1, speed2, speed0, new_checked, PFID(&ns->ln_fid_latest_scanned_phase2)); } else { __u64 speed1 = ns->ln_items_checked; __u64 speed2 = ns->ln_objs_checked_phase2; __u64 speed0 = speed1 + speed2; time64_t time0 = ns->ln_run_time_phase1 + ns->ln_run_time_phase2; if (ns->ln_run_time_phase1 != 0) speed1 = div64_s64(speed1, ns->ln_run_time_phase1); else if (ns->ln_items_checked != 0) time0++; if (ns->ln_run_time_phase2 != 0) speed2 = div64_s64(speed2, ns->ln_run_time_phase2); else if (ns->ln_objs_checked_phase2 != 0) time0++; if (time0 != 0) speed0 = div64_s64(speed0, time0); lfsck_namespace_dump_statistics(m, ns, ns->ln_items_checked, ns->ln_objs_checked_phase2, ns->ln_run_time_phase1, ns->ln_run_time_phase2, bk->lb_param & LPF_DRYRUN); seq_printf(m, "average_speed_phase1: %llu items/sec\n" "average_speed_phase2: %llu objs/sec\n" "average_speed_total: %llu items/sec\n" "real_time_speed_phase1: N/A\n" "real_time_speed_phase2: N/A\n" "current_position: N/A\n", speed1, speed2, speed0); } up_read(&com->lc_sem); } static int lfsck_namespace_double_scan(const struct lu_env *env, struct lfsck_component *com) { struct lfsck_namespace *ns = com->lc_file_ram; struct lfsck_assistant_data *lad = com->lc_data; struct lfsck_tgt_descs *ltds = &com->lc_lfsck->li_mdt_descs; struct lfsck_tgt_desc *ltd; struct lfsck_tgt_desc *next; int rc; rc = lfsck_double_scan_generic(env, com, ns->ln_status); if (thread_is_stopped(&lad->lad_thread)) { LASSERT(list_empty(&lad->lad_req_list)); LASSERT(list_empty(&lad->lad_mdt_phase1_list)); spin_lock(<ds->ltd_lock); list_for_each_entry_safe(ltd, next, &lad->lad_mdt_phase2_list, ltd_namespace_phase_list) { list_del_init(<d->ltd_namespace_phase_list); } spin_unlock(<ds->ltd_lock); } return rc; } static void lfsck_namespace_data_release(const struct lu_env *env, struct lfsck_component *com) { struct lfsck_assistant_data *lad = com->lc_data; struct lfsck_tgt_descs *ltds = &com->lc_lfsck->li_mdt_descs; struct lfsck_tgt_desc *ltd; struct lfsck_tgt_desc *next; LASSERT(lad != NULL); LASSERT(thread_is_init(&lad->lad_thread) || thread_is_stopped(&lad->lad_thread)); LASSERT(list_empty(&lad->lad_req_list)); com->lc_data = NULL; lfsck_namespace_release_lmv(env, com); spin_lock(<ds->ltd_lock); list_for_each_entry_safe(ltd, next, &lad->lad_mdt_phase1_list, ltd_namespace_phase_list) { list_del_init(<d->ltd_namespace_phase_list); } list_for_each_entry_safe(ltd, next, &lad->lad_mdt_phase2_list, ltd_namespace_phase_list) { list_del_init(<d->ltd_namespace_phase_list); } list_for_each_entry_safe(ltd, next, &lad->lad_mdt_list, ltd_namespace_list) { list_del_init(<d->ltd_namespace_list); } spin_unlock(<ds->ltd_lock); if (likely(lad->lad_bitmap != NULL)) CFS_FREE_BITMAP(lad->lad_bitmap); OBD_FREE_PTR(lad); } static void lfsck_namespace_quit(const struct lu_env *env, struct lfsck_component *com) { struct lfsck_assistant_data *lad = com->lc_data; struct lfsck_tgt_descs *ltds = &com->lc_lfsck->li_mdt_descs; struct lfsck_tgt_desc *ltd; struct lfsck_tgt_desc *next; LASSERT(lad != NULL); lfsck_quit_generic(env, com); LASSERT(thread_is_init(&lad->lad_thread) || thread_is_stopped(&lad->lad_thread)); LASSERT(list_empty(&lad->lad_req_list)); lfsck_namespace_release_lmv(env, com); spin_lock(<ds->ltd_lock); list_for_each_entry_safe(ltd, next, &lad->lad_mdt_phase1_list, ltd_namespace_phase_list) { list_del_init(<d->ltd_namespace_phase_list); } list_for_each_entry_safe(ltd, next, &lad->lad_mdt_phase2_list, ltd_namespace_phase_list) { list_del_init(<d->ltd_namespace_phase_list); } spin_unlock(<ds->ltd_lock); } static int lfsck_namespace_in_notify(const struct lu_env *env, struct lfsck_component *com, struct lfsck_request *lr) { struct lfsck_instance *lfsck = com->lc_lfsck; struct lfsck_namespace *ns = com->lc_file_ram; struct lfsck_assistant_data *lad = com->lc_data; struct lfsck_tgt_descs *ltds = &lfsck->li_mdt_descs; struct lfsck_tgt_desc *ltd; int rc = 0; bool fail = false; ENTRY; switch (lr->lr_event) { case LE_SET_LMV_MASTER: { struct dt_object *obj; obj = lfsck_object_find_bottom(env, lfsck, &lr->lr_fid); if (IS_ERR(obj)) RETURN(PTR_ERR(obj)); if (likely(dt_object_exists(obj))) rc = lfsck_namespace_notify_lmv_master_local(env, com, obj); lfsck_object_put(env, obj); RETURN(rc > 0 ? 0 : rc); } case LE_SET_LMV_SLAVE: { if (!(lr->lr_flags & LEF_RECHECK_NAME_HASH)) ns->ln_striped_shards_repaired++; rc = lfsck_namespace_trace_update(env, com, &lr->lr_fid, LNTF_RECHECK_NAME_HASH, true); RETURN(rc > 0 ? 0 : rc); } case LE_PHASE1_DONE: case LE_PHASE2_DONE: case LE_PEER_EXIT: break; default: RETURN(-EINVAL); } CDEBUG(D_LFSCK, "%s: namespace LFSCK handles notify %u from MDT %x, " "status %d, flags %x\n", lfsck_lfsck2name(lfsck), lr->lr_event, lr->lr_index, lr->lr_status, lr->lr_flags2); spin_lock(<ds->ltd_lock); ltd = lfsck_ltd2tgt(ltds, lr->lr_index); if (ltd == NULL) { spin_unlock(<ds->ltd_lock); RETURN(-ENXIO); } list_del_init(<d->ltd_namespace_phase_list); switch (lr->lr_event) { case LE_PHASE1_DONE: if (lr->lr_status <= 0) { ltd->ltd_namespace_done = 1; list_del_init(<d->ltd_namespace_list); CDEBUG(D_LFSCK, "%s: MDT %x failed/stopped at " "phase1 for namespace LFSCK: rc = %d.\n", lfsck_lfsck2name(lfsck), ltd->ltd_index, lr->lr_status); ns->ln_flags |= LF_INCOMPLETE; fail = true; break; } if (lr->lr_flags2 & LF_INCOMPLETE) ns->ln_flags |= LF_INCOMPLETE; if (list_empty(<d->ltd_namespace_list)) list_add_tail(<d->ltd_namespace_list, &lad->lad_mdt_list); list_add_tail(<d->ltd_namespace_phase_list, &lad->lad_mdt_phase2_list); break; case LE_PHASE2_DONE: ltd->ltd_namespace_done = 1; list_del_init(<d->ltd_namespace_list); break; case LE_PEER_EXIT: fail = true; ltd->ltd_namespace_done = 1; list_del_init(<d->ltd_namespace_list); if (!(lfsck->li_bookmark_ram.lb_param & LPF_FAILOUT)) { CDEBUG(D_LFSCK, "%s: the peer MDT %x exit namespace LFSCK\n", lfsck_lfsck2name(lfsck), ltd->ltd_index); ns->ln_flags |= LF_INCOMPLETE; } break; default: break; } spin_unlock(<ds->ltd_lock); if (fail && lfsck->li_bookmark_ram.lb_param & LPF_FAILOUT) { struct lfsck_stop *stop = &lfsck_env_info(env)->lti_stop; memset(stop, 0, sizeof(*stop)); stop->ls_status = lr->lr_status; stop->ls_flags = lr->lr_param & ~LPF_BROADCAST; lfsck_stop(env, lfsck->li_bottom, stop); } else if (lfsck_phase2_next_ready(lad)) { wake_up(&lad->lad_thread.t_ctl_waitq); } RETURN(0); } static void lfsck_namespace_repaired(struct lfsck_namespace *ns, __u64 *count) { *count += ns->ln_objs_nlink_repaired; *count += ns->ln_dirent_repaired; *count += ns->ln_linkea_repaired; *count += ns->ln_mul_linked_repaired; *count += ns->ln_unmatched_pairs_repaired; *count += ns->ln_dangling_repaired; *count += ns->ln_mul_ref_repaired; *count += ns->ln_bad_type_repaired; *count += ns->ln_lost_dirent_repaired; *count += ns->ln_striped_dirs_disabled; *count += ns->ln_striped_dirs_repaired; *count += ns->ln_striped_shards_repaired; *count += ns->ln_name_hash_repaired; *count += ns->ln_local_lpf_moved; } static int lfsck_namespace_query_all(const struct lu_env *env, struct lfsck_component *com, __u32 *mdts_count, __u64 *repaired) { struct lfsck_namespace *ns = com->lc_file_ram; struct lfsck_tgt_descs *ltds = &com->lc_lfsck->li_mdt_descs; struct lfsck_tgt_desc *ltd; int idx; int rc; ENTRY; rc = lfsck_query_all(env, com); if (rc != 0) RETURN(rc); down_read(<ds->ltd_rw_sem); cfs_foreach_bit(ltds->ltd_tgts_bitmap, idx) { ltd = lfsck_ltd2tgt(ltds, idx); LASSERT(ltd != NULL); mdts_count[ltd->ltd_namespace_status]++; *repaired += ltd->ltd_namespace_repaired; } up_read(<ds->ltd_rw_sem); down_read(&com->lc_sem); mdts_count[ns->ln_status]++; lfsck_namespace_repaired(ns, repaired); up_read(&com->lc_sem); RETURN(0); } static int lfsck_namespace_query(const struct lu_env *env, struct lfsck_component *com, struct lfsck_request *req, struct lfsck_reply *rep, struct lfsck_query *que, int idx) { struct lfsck_namespace *ns = com->lc_file_ram; int rc = 0; if (que != NULL) { LASSERT(com->lc_lfsck->li_master); rc = lfsck_namespace_query_all(env, com, que->lu_mdts_count[idx], &que->lu_repaired[idx]); } else { down_read(&com->lc_sem); rep->lr_status = ns->ln_status; if (req->lr_flags & LEF_QUERY_ALL) lfsck_namespace_repaired(ns, &rep->lr_repaired); up_read(&com->lc_sem); } return rc; } static const struct lfsck_operations lfsck_namespace_ops = { .lfsck_reset = lfsck_namespace_reset, .lfsck_fail = lfsck_namespace_fail, .lfsck_close_dir = lfsck_namespace_close_dir, .lfsck_open_dir = lfsck_namespace_open_dir, .lfsck_checkpoint = lfsck_namespace_checkpoint, .lfsck_prep = lfsck_namespace_prep, .lfsck_exec_oit = lfsck_namespace_exec_oit, .lfsck_exec_dir = lfsck_namespace_exec_dir, .lfsck_post = lfsck_namespace_post, .lfsck_dump = lfsck_namespace_dump, .lfsck_double_scan = lfsck_namespace_double_scan, .lfsck_data_release = lfsck_namespace_data_release, .lfsck_quit = lfsck_namespace_quit, .lfsck_in_notify = lfsck_namespace_in_notify, .lfsck_query = lfsck_namespace_query, }; /** * Repair dangling name entry. * * For the name entry with dangling reference, we need to repare the * inconsistency according to the LFSCK sponsor's requirement: * * 1) Keep the inconsistency there and report the inconsistency case, * then give the chance to the application to find related issues, * and the users can make the decision about how to handle it with * more human knownledge. (by default) * * 2) Re-create the missing MDT-object with the FID information. * * \param[in] env pointer to the thread context * \param[in] com pointer to the lfsck component * \param[in] parent pointer to the dir object that contains the dangling * name entry * \param[in] child pointer to the object corresponding to the dangling * name entry * \param[in] lnr pointer to the namespace request that contains the * name's name, parent object, parent's LMV, and ect. * * \retval positive number if no need to repair * \retval zero for repaired successfully * \retval negative error number on failure */ int lfsck_namespace_repair_dangling(const struct lu_env *env, struct lfsck_component *com, struct dt_object *parent, struct dt_object *child, struct lfsck_namespace_req *lnr) { struct lfsck_thread_info *info = lfsck_env_info(env); struct lu_attr *la = &info->lti_la; struct dt_allocation_hint *hint = &info->lti_hint; struct dt_object_format *dof = &info->lti_dof; struct dt_insert_rec *rec = &info->lti_dt_rec; struct lmv_mds_md_v1 *lmv2 = &info->lti_lmv2; const struct lu_name *cname; const struct lu_fid *pfid = lfsck_dto2fid(parent); const struct lu_fid *cfid = lfsck_dto2fid(child); struct linkea_data ldata = { NULL }; struct lfsck_lock_handle *llh = &info->lti_llh; struct lustre_handle rlh = { 0 }; struct lustre_handle clh = { 0 }; struct lu_buf linkea_buf; struct lu_buf lmv_buf; struct lfsck_instance *lfsck = com->lc_lfsck; struct lfsck_bookmark *bk = &lfsck->li_bookmark_ram; struct dt_device *dev = lfsck->li_next; struct thandle *th = NULL; int rc = 0; __u16 type = lnr->lnr_type; bool create; ENTRY; cname = lfsck_name_get_const(env, lnr->lnr_name, lnr->lnr_namelen); if (bk->lb_param & LPF_CREATE_MDTOBJ) create = true; else create = false; if (!create || bk->lb_param & LPF_DRYRUN) GOTO(log, rc = 0); /* We may need to create the sub-objects of the @child via LOD, * so make the modification based on lfsck->li_next. */ parent = lfsck_object_locate(dev, parent); if (IS_ERR(parent)) GOTO(log, rc = PTR_ERR(parent)); if (unlikely(!dt_try_as_dir(env, parent))) GOTO(log, rc = -ENOTDIR); child = lfsck_object_locate(dev, child); if (IS_ERR(child)) GOTO(log, rc = PTR_ERR(child)); rc = linkea_links_new(&ldata, &info->lti_linkea_buf2, cname, pfid); if (rc != 0) GOTO(log, rc); rc = lfsck_lock(env, lfsck, parent, lnr->lnr_name, llh, MDS_INODELOCK_UPDATE, LCK_PW); if (rc != 0) GOTO(log, rc); rc = lfsck_namespace_check_exist(env, parent, child, lnr->lnr_name); if (rc != 0) GOTO(log, rc); if (dt_object_remote(child)) { rc = lfsck_remote_lookup_lock(env, lfsck, parent, child, &rlh, LCK_EX); if (rc != 0) GOTO(log, rc); } rc = lfsck_ibits_lock(env, lfsck, child, &clh, MDS_INODELOCK_UPDATE | MDS_INODELOCK_LOOKUP | MDS_INODELOCK_XATTR, LCK_EX); if (rc != 0) GOTO(unlock_remote_lookup, rc); /* Set the ctime as zero, then others can know it is created for * repairing dangling name entry by LFSCK. And if the LFSCK made * wrong decision and the real MDT-object has been found later, * then the LFSCK has chance to fix the incosistency properly. */ memset(la, 0, sizeof(*la)); if (S_ISDIR(type)) la->la_mode = (type & S_IFMT) | 0700; else la->la_mode = (type & S_IFMT) | 0600; la->la_valid = LA_TYPE | LA_MODE | LA_CTIME; /* * if it's directory, skip do_ah_init() to create a plain directory * because it may have shards already, which will be inserted back * later, besides, it may be remote, and creating stripe directory * remotely is not supported. */ if (S_ISREG(type)) child->do_ops->do_ah_init(env, hint, parent, child, type); else if (S_ISDIR(type)) child->do_ops->do_ah_init(env, hint, NULL, child, type); memset(dof, 0, sizeof(*dof)); dof->dof_type = dt_mode_to_dft(type); /* If the target is a regular file, then the LFSCK will only create * the MDT-object without stripes (dof->dof_reg.striped = 0). related * OST-objects will be created when write open. */ th = dt_trans_create(env, dev); if (IS_ERR(th)) GOTO(unlock_child, rc = PTR_ERR(th)); /* 1a. create child. */ rc = dt_declare_create(env, child, la, hint, dof, th); if (rc != 0) GOTO(stop, rc); if (S_ISDIR(type)) { if (unlikely(!dt_try_as_dir(env, child))) GOTO(stop, rc = -ENOTDIR); /* 2a. increase child nlink */ rc = dt_declare_ref_add(env, child, th); if (rc != 0) GOTO(stop, rc); /* 3a. insert dot into child dir */ rec->rec_type = S_IFDIR; rec->rec_fid = cfid; rc = dt_declare_insert(env, child, (const struct dt_rec *)rec, (const struct dt_key *)dot, th); if (rc != 0) GOTO(stop, rc); /* 4a. insert dotdot into child dir */ rec->rec_fid = pfid; rc = dt_declare_insert(env, child, (const struct dt_rec *)rec, (const struct dt_key *)dotdot, th); if (rc != 0) GOTO(stop, rc); /* 5a. generate slave LMV EA. */ if (lnr->lnr_lmv != NULL && lnr->lnr_lmv->ll_lmv_master) { int idx; idx = lfsck_shard_name_to_index(env, lnr->lnr_name, lnr->lnr_namelen, type, cfid); if (unlikely(idx < 0)) GOTO(stop, rc = idx); *lmv2 = lnr->lnr_lmv->ll_lmv; lmv2->lmv_magic = LMV_MAGIC_STRIPE; lmv2->lmv_master_mdt_index = idx; lfsck_lmv_header_cpu_to_le(lmv2, lmv2); lfsck_buf_init(&lmv_buf, lmv2, sizeof(*lmv2)); rc = dt_declare_xattr_set(env, child, &lmv_buf, XATTR_NAME_LMV, 0, th); if (rc != 0) GOTO(stop, rc); } } /* 6a. insert linkEA for child */ lfsck_buf_init(&linkea_buf, ldata.ld_buf->lb_buf, ldata.ld_leh->leh_len); rc = dt_declare_xattr_set(env, child, &linkea_buf, XATTR_NAME_LINK, 0, th); if (rc != 0) GOTO(stop, rc); /* 7a. if child is remote, delete and insert to generate local agent */ if (dt_object_remote(child)) { rc = dt_declare_delete(env, parent, (const struct dt_key *)lnr->lnr_name, th); if (rc) GOTO(stop, rc); rc = dt_declare_insert(env, parent, (const struct dt_rec *)rec, (const struct dt_key *)lnr->lnr_name, th); if (rc) GOTO(stop, rc); } rc = dt_trans_start_local(env, dev, th); if (rc != 0) GOTO(stop, rc = (rc == -EEXIST ? 1 : rc)); dt_write_lock(env, child, 0); /* 1b. create child */ rc = dt_create(env, child, la, hint, dof, th); if (rc != 0) GOTO(unlock, rc = (rc == -EEXIST ? 1 : rc)); if (S_ISDIR(type)) { /* 2b. increase child nlink */ rc = dt_ref_add(env, child, th); if (rc != 0) GOTO(unlock, rc); /* 3b. insert dot into child dir */ rec->rec_type = S_IFDIR; rec->rec_fid = cfid; rc = dt_insert(env, child, (const struct dt_rec *)rec, (const struct dt_key *)dot, th); if (rc != 0) GOTO(unlock, rc); /* 4b. insert dotdot into child dir */ rec->rec_fid = pfid; rc = dt_insert(env, child, (const struct dt_rec *)rec, (const struct dt_key *)dotdot, th); if (rc != 0) GOTO(unlock, rc); /* 5b. generate slave LMV EA. */ if (lnr->lnr_lmv != NULL && lnr->lnr_lmv->ll_lmv_master) { rc = dt_xattr_set(env, child, &lmv_buf, XATTR_NAME_LMV, 0, th); if (rc != 0) GOTO(unlock, rc); } } /* 6b. insert linkEA for child. */ rc = dt_xattr_set(env, child, &linkea_buf, XATTR_NAME_LINK, 0, th); if (rc) GOTO(unlock, rc); /* 7b. if child is remote, delete and insert to generate local agent */ if (dt_object_remote(child)) { rc = dt_delete(env, parent, (const struct dt_key *)lnr->lnr_name, th); if (rc) GOTO(unlock, rc); rec->rec_type = type; rec->rec_fid = cfid; rc = dt_insert(env, parent, (const struct dt_rec *)rec, (const struct dt_key *)lnr->lnr_name, th); if (rc) GOTO(unlock, rc); } GOTO(unlock, rc); unlock: dt_write_unlock(env, child); stop: dt_trans_stop(env, dev, th); unlock_child: lfsck_ibits_unlock(&clh, LCK_EX); unlock_remote_lookup: if (dt_object_remote(child)) lfsck_ibits_unlock(&rlh, LCK_EX); log: lfsck_unlock(llh); CDEBUG(D_LFSCK, "%s: namespace LFSCK assistant found dangling " "reference for: parent "DFID", child "DFID", type %u, " "name %s. %s: rc = %d\n", lfsck_lfsck2name(lfsck), PFID(pfid), PFID(cfid), type, cname->ln_name, create ? "Create the lost MDT-object as required" : "Keep the MDT-object there by default", rc); if (rc <= 0) { struct lfsck_namespace *ns = com->lc_file_ram; ns->ln_flags |= LF_INCONSISTENT; } return rc; } static int lfsck_namespace_assistant_handler_p1(const struct lu_env *env, struct lfsck_component *com, struct lfsck_assistant_req *lar) { struct lfsck_thread_info *info = lfsck_env_info(env); struct lu_attr *la = &info->lti_la; struct lfsck_instance *lfsck = com->lc_lfsck; struct lfsck_bookmark *bk = &lfsck->li_bookmark_ram; struct lfsck_namespace *ns = com->lc_file_ram; struct lfsck_assistant_data *lad = com->lc_data; struct linkea_data ldata = { NULL }; const struct lu_name *cname; struct thandle *handle = NULL; struct lfsck_namespace_req *lnr = container_of(lar, struct lfsck_namespace_req, lnr_lar); struct dt_object *dir = NULL; struct dt_object *obj = NULL; struct lfsck_assistant_object *lso = lar->lar_parent; const struct lu_fid *pfid = &lso->lso_fid; struct dt_device *dev = NULL; struct lustre_handle lh = { 0 }; bool repaired = false; bool dtlocked = false; bool remove = false; bool newdata = false; bool log = false; bool bad_hash = false; bool bad_linkea = false; int idx = 0; int count = 0; int rc = 0; enum lfsck_namespace_inconsistency_type type = LNIT_NONE; ENTRY; if (lso->lso_dead) RETURN(0); la->la_nlink = 0; if (lnr->lnr_attr & LUDA_UPGRADE) { ns->ln_flags |= LF_UPGRADE; ns->ln_dirent_repaired++; repaired = true; } else if (lnr->lnr_attr & LUDA_REPAIR) { ns->ln_flags |= LF_INCONSISTENT; ns->ln_dirent_repaired++; repaired = true; } if (unlikely(fid_is_zero(&lnr->lnr_fid) && strcmp(lnr->lnr_name, dotdot) == 0)) { rc = lfsck_namespace_trace_update(env, com, pfid, LNTF_CHECK_PARENT, true); GOTO(out, rc); } if (unlikely(!fid_is_sane(&lnr->lnr_fid))) { CDEBUG(D_LFSCK, "%s: dir scan find invalid FID "DFID " for the name entry %.*s under "DFID"\n", lfsck_lfsck2name(lfsck), PFID(&lnr->lnr_fid), lnr->lnr_namelen, lnr->lnr_name, PFID(pfid)); if (strcmp(lnr->lnr_name, dotdot) != 0) /* invalid FID means bad name entry, remove it. */ type = LNIT_BAD_DIRENT; else /* If the parent FID is invalid, we cannot remove * the ".." entry directly. */ rc = lfsck_namespace_trace_update(env, com, pfid, LNTF_CHECK_PARENT, true); GOTO(out, rc); } if (unlikely(lnr->lnr_dir_cookie == MDS_DIR_END_OFF)) { rc = lfsck_namespace_striped_dir_rescan(env, com, lnr); RETURN(rc); } if (fid_seq_is_dot(fid_seq(&lnr->lnr_fid))) GOTO(out, rc = 0); if (lnr->lnr_lmv != NULL && lnr->lnr_lmv->ll_lmv_master) { rc = lfsck_namespace_handle_striped_master(env, com, lnr); RETURN(rc); } idx = lfsck_find_mdt_idx_by_fid(env, lfsck, &lnr->lnr_fid); if (idx < 0) GOTO(out, rc = idx); if (idx == lfsck_dev_idx(lfsck)) { if (unlikely(strcmp(lnr->lnr_name, dotdot) == 0)) GOTO(out, rc = 0); dev = lfsck->li_bottom; } else { struct lfsck_tgt_desc *ltd; /* Usually, some local filesystem consistency verification * tools can guarantee the local namespace tree consistenct. * So the LFSCK will only verify the remote directory. */ if (unlikely(strcmp(lnr->lnr_name, dotdot) == 0)) { rc = lfsck_namespace_trace_update(env, com, pfid, LNTF_CHECK_PARENT, true); GOTO(out, rc); } ltd = lfsck_ltd2tgt(&lfsck->li_mdt_descs, idx); if (unlikely(ltd == NULL)) { CDEBUG(D_LFSCK, "%s: cannot talk with MDT %x which " "did not join the namespace LFSCK\n", lfsck_lfsck2name(lfsck), idx); lfsck_lad_set_bitmap(env, com, idx); GOTO(out, rc = -ENODEV); } dev = ltd->ltd_tgt; } obj = lfsck_object_find_by_dev(env, dev, &lnr->lnr_fid); if (IS_ERR(obj)) GOTO(out, rc = PTR_ERR(obj)); cname = lfsck_name_get_const(env, lnr->lnr_name, lnr->lnr_namelen); if (dt_object_exists(obj) == 0) { dangling: if (dir == NULL) { dir = lfsck_assistant_object_load(env, lfsck, lso); if (IS_ERR(dir)) { rc = PTR_ERR(dir); GOTO(trace, rc == -ENOENT ? 0 : rc); } } rc = lfsck_namespace_check_exist(env, dir, obj, lnr->lnr_name); if (rc == 0) { if (!lfsck_is_valid_slave_name_entry(env, lnr->lnr_lmv, lnr->lnr_name, lnr->lnr_namelen)) { type = LNIT_BAD_DIRENT; GOTO(out, rc); } type = LNIT_DANGLING; rc = lfsck_namespace_repair_dangling(env, com, dir, obj, lnr); if (rc == 0) repaired = true; } GOTO(out, rc); } if (!(bk->lb_param & LPF_DRYRUN) && lad->lad_advance_lock) { again: rc = lfsck_ibits_lock(env, lfsck, obj, &lh, MDS_INODELOCK_UPDATE | MDS_INODELOCK_XATTR, LCK_EX); if (rc != 0) GOTO(out, rc); handle = dt_trans_create(env, dev); if (IS_ERR(handle)) GOTO(out, rc = PTR_ERR(handle)); rc = lfsck_declare_namespace_exec_dir(env, obj, handle); if (rc != 0) GOTO(stop, rc); rc = dt_trans_start_local(env, dev, handle); if (rc != 0) GOTO(stop, rc); dt_write_lock(env, obj, 0); dtlocked = true; } rc = lfsck_links_read(env, obj, &ldata); if (unlikely(rc == -ENOENT)) { if (handle != NULL) { dt_write_unlock(env, obj); dtlocked = false; dt_trans_stop(env, dev, handle); handle = NULL; lfsck_ibits_unlock(&lh, LCK_EX); } /* It may happen when the remote object has been removed, * but the local MDT is not aware of that. */ goto dangling; } else if (rc == 0) { count = ldata.ld_leh->leh_reccount; rc = linkea_links_find(&ldata, cname, pfid); if ((rc == 0) && (count == 1 || !S_ISDIR(lfsck_object_type(obj)))) { if ((lfsck_object_type(obj) & S_IFMT) != lnr->lnr_type) { ns->ln_flags |= LF_INCONSISTENT; type = LNIT_BAD_TYPE; } goto stop; } /* If the name entry hash does not match the slave striped * directory, and the name entry does not match also, then * it is quite possible that name entry is corrupted. */ if (!lfsck_is_valid_slave_name_entry(env, lnr->lnr_lmv, lnr->lnr_name, lnr->lnr_namelen)) { ns->ln_flags |= LF_INCONSISTENT; type = LNIT_BAD_DIRENT; GOTO(stop, rc = 0); } /* If the file type stored in the name entry does not match * the file type claimed by the object, and the object does * not recognize the name entry, then it is quite possible * that the name entry is corrupted. */ if ((lfsck_object_type(obj) & S_IFMT) != lnr->lnr_type) { ns->ln_flags |= LF_INCONSISTENT; type = LNIT_BAD_DIRENT; GOTO(stop, rc = 0); } /* For sub-dir object, we cannot make sure whether the sub-dir * back references the parent via ".." name entry correctly or * not in the LFSCK first-stage scanning. It may be that the * (remote) sub-dir ".." name entry has no parent FID after * file-level backup/restore and its linkEA may be wrong. * So under such case, we should replace the linkEA according * to current name entry. But this needs to be done during the * LFSCK second-stage scanning. The LFSCK will record the name * entry for further possible using. */ remove = false; newdata = false; goto nodata; } else if (unlikely(rc == -EINVAL)) { if ((lfsck_object_type(obj) & S_IFMT) != lnr->lnr_type) type = LNIT_BAD_TYPE; count = 1; /* The magic crashed, we are not sure whether there are more * corrupt data in the linkea, so remove all linkea entries. */ remove = true; newdata = true; goto nodata; } else if (rc == -ENODATA) { if ((lfsck_object_type(obj) & S_IFMT) != lnr->lnr_type) type = LNIT_BAD_TYPE; count = 1; remove = false; newdata = true; nodata: if (bk->lb_param & LPF_DRYRUN) { if (rc == -ENODATA) ns->ln_flags |= LF_UPGRADE; else ns->ln_flags |= LF_INCONSISTENT; ns->ln_linkea_repaired++; repaired = true; log = true; goto stop; } if (!lustre_handle_is_used(&lh)) { remove = false; newdata = false; type = LNIT_NONE; goto again; } LASSERT(handle != NULL); if (dir == NULL) { dir = lfsck_assistant_object_load(env, lfsck, lso); if (IS_ERR(dir)) { rc = PTR_ERR(dir); GOTO(stop, rc == -ENOENT ? 0 : rc); } } rc = lfsck_namespace_check_exist(env, dir, obj, lnr->lnr_name); if (rc != 0) GOTO(stop, rc); bad_linkea = true; if (!remove && newdata) ns->ln_flags |= LF_UPGRADE; else if (remove || !(ns->ln_flags & LF_UPGRADE)) ns->ln_flags |= LF_INCONSISTENT; if (remove) { LASSERT(newdata); rc = dt_xattr_del(env, obj, XATTR_NAME_LINK, handle); if (rc != 0 && rc != -ENOENT && rc != -ENODATA) GOTO(stop, rc); } if (newdata) { rc = linkea_data_new(&ldata, &lfsck_env_info(env)->lti_linkea_buf); if (rc != 0) GOTO(stop, rc); } rc = linkea_add_buf(&ldata, cname, pfid, false); if (rc == 0) rc = lfsck_links_write(env, obj, &ldata, handle); if (rc != 0) GOTO(stop, rc); count = ldata.ld_leh->leh_reccount; if (!S_ISDIR(lfsck_object_type(obj)) || !dt_object_remote(obj)) { ns->ln_linkea_repaired++; repaired = true; log = true; } } else { GOTO(stop, rc); } stop: if (dtlocked) dt_write_unlock(env, obj); if (handle != NULL && !IS_ERR(handle)) dt_trans_stop(env, dev, handle); out: lfsck_ibits_unlock(&lh, LCK_EX); if (!name_is_dot_or_dotdot(lnr->lnr_name, lnr->lnr_namelen) && !lfsck_is_valid_slave_name_entry(env, lnr->lnr_lmv, lnr->lnr_name, lnr->lnr_namelen) && type != LNIT_BAD_DIRENT) { ns->ln_flags |= LF_INCONSISTENT; log = false; if (dir == NULL) { dir = lfsck_assistant_object_load(env, lfsck, lso); if (IS_ERR(dir)) { rc = PTR_ERR(dir); GOTO(trace, rc == -ENOENT ? 0 : rc); } } rc = lfsck_namespace_repair_bad_name_hash(env, com, dir, lnr->lnr_lmv, lnr->lnr_name); if (rc == 0) bad_hash = true; } if (rc >= 0) { if (type != LNIT_NONE && dir == NULL) { dir = lfsck_assistant_object_load(env, lfsck, lso); if (IS_ERR(dir)) { rc = PTR_ERR(dir); GOTO(trace, rc == -ENOENT ? 0 : rc); } } switch (type) { case LNIT_BAD_TYPE: log = false; rc = lfsck_namespace_repair_dirent(env, com, dir, obj, lnr->lnr_name, lnr->lnr_name, lnr->lnr_type, true, false); if (rc > 0) repaired = true; break; case LNIT_BAD_DIRENT: log = false; /* XXX: This is a bad dirent, we do not know whether * the original name entry reference a regular * file or a directory, then keep the parent's * nlink count unchanged here. */ rc = lfsck_namespace_repair_dirent(env, com, dir, obj, lnr->lnr_name, lnr->lnr_name, lnr->lnr_type, false, false); if (rc > 0) repaired = true; break; default: break; } if (obj != NULL && count == 1 && S_ISREG(lfsck_object_type(obj))) dt_attr_get(env, obj, la); /* if new linkea entry is added, the old entry may be stale, * check it in phase 2. Sigh, linkea check can only be done * locally. */ if (bad_linkea && !remove && !newdata && !dt_object_remote(obj) && count > 1) rc = lfsck_namespace_trace_update(env, com, &lnr->lnr_fid, LNTF_CHECK_LINKEA, true); } trace: down_write(&com->lc_sem); if (rc < 0) { CDEBUG(D_LFSCK, "%s: namespace LFSCK assistant fail to handle " "the entry: "DFID", parent "DFID", name %.*s: rc = %d\n", lfsck_lfsck2name(lfsck), PFID(&lnr->lnr_fid), PFID(pfid), lnr->lnr_namelen, lnr->lnr_name, rc); lfsck_namespace_record_failure(env, lfsck, ns); if ((rc == -ENOTCONN || rc == -ESHUTDOWN || rc == -EREMCHG || rc == -ETIMEDOUT || rc == -EHOSTDOWN || rc == -EHOSTUNREACH || rc == -EINPROGRESS) && dev != NULL && dev != lfsck->li_bottom) lfsck_lad_set_bitmap(env, com, idx); if (!(bk->lb_param & LPF_FAILOUT)) rc = 0; } else { if (repaired) { ns->ln_items_repaired++; if (log) CDEBUG(D_LFSCK, "%s: namespace LFSCK assistant " "repaired the entry: "DFID", parent "DFID ", name %.*s, type %d\n", lfsck_lfsck2name(lfsck), PFID(&lnr->lnr_fid), PFID(pfid), lnr->lnr_namelen, lnr->lnr_name, type); switch (type) { case LNIT_DANGLING: ns->ln_dangling_repaired++; break; case LNIT_BAD_TYPE: ns->ln_bad_type_repaired++; break; case LNIT_BAD_DIRENT: ns->ln_dirent_repaired++; break; default: break; } if (bk->lb_param & LPF_DRYRUN && lfsck_pos_is_zero(&ns->ln_pos_first_inconsistent)) lfsck_pos_fill(env, lfsck, &ns->ln_pos_first_inconsistent, false); } if (bad_hash) { ns->ln_name_hash_repaired++; /* Not count repeatedly. */ if (!repaired) { ns->ln_items_repaired++; if (log) CDEBUG(D_LFSCK, "%s: namespace LFSCK " "assistant repaired the entry: " DFID", parent "DFID ", name %.*s\n", lfsck_lfsck2name(lfsck), PFID(&lnr->lnr_fid), PFID(pfid), lnr->lnr_namelen, lnr->lnr_name); } if (bk->lb_param & LPF_DRYRUN && lfsck_pos_is_zero(&ns->ln_pos_first_inconsistent)) lfsck_pos_fill(env, lfsck, &ns->ln_pos_first_inconsistent, false); } rc = 0; } if (count > 1 || la->la_nlink > 1) ns->ln_mul_linked_checked++; up_write(&com->lc_sem); if (obj != NULL && !IS_ERR(obj)) lfsck_object_put(env, obj); if (dir != NULL && !IS_ERR(dir)) lfsck_object_put(env, dir); lad->lad_advance_lock = bad_linkea; return rc; } /** * Handle one orphan under the backend /lost+found directory * * Insert the orphan FID into the namespace LFSCK trace file for further * processing (via the subsequent namespace LFSCK second-stage scanning). * At the same time, remove the orphan name entry from backend /lost+found * directory. There is an interval between the orphan name entry removed * from the backend /lost+found directory and the orphan FID in the LFSCK * trace file handled. In such interval, the LFSCK can be reset, then * all the FIDs recorded in the namespace LFSCK trace file will be dropped. * To guarantee that the orphans can be found when LFSCK run next time * without e2fsck again, when remove the orphan name entry, the LFSCK * will set the orphan's ctime attribute as 1. Since normal applications * cannot change the object's ctime attribute as 1. Then when LFSCK run * next time, it can record the object (that ctime is 1) in the namespace * LFSCK trace file during the first-stage scanning. * * \param[in] env pointer to the thread context * \param[in] com pointer to the lfsck component * \param[in] parent pointer to the object for the backend /lost+found * \param[in] ent pointer to the name entry for the target under the * backend /lost+found * * \retval positive for repaired * \retval 0 if needs to repair nothing * \retval negative error number on failure */ static int lfsck_namespace_scan_local_lpf_one(const struct lu_env *env, struct lfsck_component *com, struct dt_object *parent, struct lu_dirent *ent) { struct lfsck_thread_info *info = lfsck_env_info(env); struct lu_fid *key = &info->lti_fid; struct lu_attr *la = &info->lti_la; struct lfsck_instance *lfsck = com->lc_lfsck; struct dt_object *obj; struct dt_device *dev = lfsck->li_bottom; struct dt_object *child = NULL; struct thandle *th = NULL; int idx; int rc = 0; __u8 flags = 0; bool exist = false; ENTRY; child = lfsck_object_find_by_dev(env, dev, &ent->lde_fid); if (IS_ERR(child)) RETURN(PTR_ERR(child)); LASSERT(dt_object_exists(child)); LASSERT(!dt_object_remote(child)); idx = lfsck_sub_trace_file_fid2idx(&ent->lde_fid); obj = com->lc_sub_trace_objs[idx].lsto_obj; fid_cpu_to_be(key, &ent->lde_fid); rc = dt_lookup(env, obj, (struct dt_rec *)&flags, (const struct dt_key *)key); if (rc == 0) { exist = true; flags |= LNTF_CHECK_ORPHAN; } else if (rc == -ENOENT) { flags = LNTF_CHECK_ORPHAN; } else { GOTO(out, rc); } th = dt_trans_create(env, dev); if (IS_ERR(th)) GOTO(out, rc = PTR_ERR(th)); /* a1. remove name entry from backend /lost+found */ rc = dt_declare_delete(env, parent, (const struct dt_key *)ent->lde_name, th); if (rc != 0) GOTO(stop, rc); if (S_ISDIR(lfsck_object_type(child))) { /* a2. decrease parent's nlink */ rc = dt_declare_ref_del(env, parent, th); if (rc != 0) GOTO(stop, rc); } if (exist) { /* a3. remove child's FID from the LFSCK trace file. */ rc = dt_declare_delete(env, obj, (const struct dt_key *)key, th); if (rc != 0) GOTO(stop, rc); } else { /* a4. set child's ctime as 1 */ memset(la, 0, sizeof(*la)); la->la_ctime = 1; la->la_valid = LA_CTIME; rc = dt_declare_attr_set(env, child, la, th); if (rc != 0) GOTO(stop, rc); } /* a5. insert child's FID into the LFSCK trace file. */ rc = dt_declare_insert(env, obj, (const struct dt_rec *)&flags, (const struct dt_key *)key, th); if (rc != 0) GOTO(stop, rc); rc = dt_trans_start_local(env, dev, th); if (rc != 0) GOTO(stop, rc); /* b1. remove name entry from backend /lost+found */ rc = dt_delete(env, parent, (const struct dt_key *)ent->lde_name, th); if (rc != 0) GOTO(stop, rc); if (S_ISDIR(lfsck_object_type(child))) { /* b2. decrease parent's nlink */ dt_write_lock(env, parent, 0); rc = dt_ref_del(env, parent, th); dt_write_unlock(env, parent); if (rc != 0) GOTO(stop, rc); } if (exist) { /* a3. remove child's FID from the LFSCK trace file. */ rc = dt_delete(env, obj, (const struct dt_key *)key, th); if (rc != 0) GOTO(stop, rc); } else { /* b4. set child's ctime as 1 */ rc = dt_attr_set(env, child, la, th); if (rc != 0) GOTO(stop, rc); } /* b5. insert child's FID into the LFSCK trace file. */ rc = dt_insert(env, obj, (const struct dt_rec *)&flags, (const struct dt_key *)key, th); GOTO(stop, rc = (rc == 0 ? 1 : rc)); stop: dt_trans_stop(env, dev, th); out: lfsck_object_put(env, child); return rc; } /** * Handle orphans under the backend /lost+found directory * * Some backend checker, such as e2fsck for ldiskfs may find some orphans * and put them under the backend /lost+found directory that is invisible * to client. The LFSCK will scan such directory, for the original client * visible orphans, add their fids into the namespace LFSCK trace file, * then the subsenquent namespace LFSCK second-stage scanning can handle * them as other objects to be double scanned: either move back to normal * namespace, or to the global visible orphan directory: * /ROOT/.lustre/lost+found/MDTxxxx/ * * \param[in] env pointer to the thread context * \param[in] com pointer to the lfsck component */ static void lfsck_namespace_scan_local_lpf(const struct lu_env *env, struct lfsck_component *com) { struct lfsck_thread_info *info = lfsck_env_info(env); struct lu_dirent *ent = (struct lu_dirent *)info->lti_key; struct lu_seq_range *range = &info->lti_range; struct lfsck_instance *lfsck = com->lc_lfsck; struct ptlrpc_thread *thread = &lfsck->li_thread; struct lfsck_bookmark *bk = &lfsck->li_bookmark_ram; struct lfsck_namespace *ns = com->lc_file_ram; struct dt_object *parent; const struct dt_it_ops *iops; struct dt_it *di; struct seq_server_site *ss = lfsck_dev_site(lfsck); __u64 cookie; __u32 idx = lfsck_dev_idx(lfsck); int rc = 0; __u16 type; ENTRY; parent = lfsck_object_find_by_dev(env, lfsck->li_bottom, &LU_BACKEND_LPF_FID); if (IS_ERR(parent)) { CERROR("%s: fail to find backend /lost+found: rc = %ld\n", lfsck_lfsck2name(lfsck), PTR_ERR(parent)); RETURN_EXIT; } /* It is normal that the /lost+found does not exist for ZFS backend. */ if (!dt_object_exists(parent)) GOTO(out, rc = 0); if (unlikely(!dt_try_as_dir(env, parent))) GOTO(out, rc = -ENOTDIR); CDEBUG(D_LFSCK, "%s: start to scan backend /lost+found\n", lfsck_lfsck2name(lfsck)); com->lc_new_scanned = 0; iops = &parent->do_index_ops->dio_it; di = iops->init(env, parent, LUDA_64BITHASH | LUDA_TYPE); if (IS_ERR(di)) GOTO(out, rc = PTR_ERR(di)); rc = iops->load(env, di, 0); if (rc == 0) rc = iops->next(env, di); else if (rc > 0) rc = 0; while (rc == 0) { if (CFS_FAIL_TIMEOUT(OBD_FAIL_LFSCK_DELAY3, cfs_fail_val) && unlikely(!thread_is_running(thread))) break; rc = iops->rec(env, di, (struct dt_rec *)ent, LUDA_64BITHASH | LUDA_TYPE); if (rc == 0) rc = lfsck_unpack_ent(ent, &cookie, &type); if (unlikely(rc != 0)) { CDEBUG(D_LFSCK, "%s: fail to iterate backend " "/lost+found: rc = %d\n", lfsck_lfsck2name(lfsck), rc); goto skip; } /* skip dot and dotdot entries */ if (name_is_dot_or_dotdot(ent->lde_name, ent->lde_namelen)) goto next; if (!fid_seq_in_fldb(fid_seq(&ent->lde_fid))) goto skip; if (fid_is_norm(&ent->lde_fid)) { fld_range_set_mdt(range); rc = fld_local_lookup(env, ss->ss_server_fld, fid_seq(&ent->lde_fid), range); if (rc != 0) goto skip; } else if (idx != 0) { /* If the returned FID is IGIF, then there are three * possible cases: * * 1) The object is upgraded from old Lustre-1.8 with * IGIF assigned to such object. * 2) The object is a backend local object and is * invisible to client. * 3) The object lost its LMV EA, and since there is * no FID-in-dirent for the orphan in the backend * /lost+found directory, then the low layer will * return IGIF for such object. * * For MDTx (x != 0), it is either case 2) or case 3), * but from the LFSCK view, they are indistinguishable. * To be safe, the LFSCK will keep it there and report * some message, then the adminstrator can handle that * furtherly. * * For MDT0, it is more possible the case 1). The LFSCK * will handle the orphan as an upgraded object. */ CDEBUG(D_LFSCK, "%s: the orphan %.*s with IGIF "DFID "in the backend /lost+found on the MDT %04x, " "to be safe, skip it.\n", lfsck_lfsck2name(lfsck), ent->lde_namelen, ent->lde_name, PFID(&ent->lde_fid), idx); goto skip; } rc = lfsck_namespace_scan_local_lpf_one(env, com, parent, ent); skip: down_write(&com->lc_sem); com->lc_new_scanned++; ns->ln_local_lpf_scanned++; if (rc > 0) ns->ln_local_lpf_moved++; else if (rc == 0) ns->ln_local_lpf_skipped++; else ns->ln_local_lpf_failed++; up_write(&com->lc_sem); if (rc < 0 && bk->lb_param & LPF_FAILOUT) break; next: lfsck_control_speed_by_self(com); if (unlikely(!thread_is_running(thread))) { rc = 0; break; } rc = iops->next(env, di); } iops->put(env, di); iops->fini(env, di); EXIT; out: CDEBUG(D_LFSCK, "%s: stop to scan backend /lost+found: rc = %d\n", lfsck_lfsck2name(lfsck), rc); lfsck_object_put(env, parent); } /** * Rescan the striped directory after the master LMV EA reset. * * Sometimes, the master LMV EA of the striped directory maybe lost, so when * the namespace LFSCK engine scan the striped directory for the first time, * it will be regarded as a normal directory. As the LFSCK processing, some * other LFSCK instance on other MDT will find the shard of this striped dir, * and find that the master MDT-object of the striped directory lost its LMV * EA, then such remote LFSCK instance will regenerate the master LMV EA and * notify the LFSCK instance on this MDT to rescan the striped directory. * * \param[in] env pointer to the thread context * \param[in] com pointer to the lfsck component * \param[in] llu the lfsck_lmv_unit that contains the striped directory * to be rescanned. * * \retval positive number for success * \retval 0 for LFSCK stopped/paused * \retval negative error number on failure */ static int lfsck_namespace_rescan_striped_dir(const struct lu_env *env, struct lfsck_component *com, struct lfsck_lmv_unit *llu) { struct lfsck_thread_info *info = lfsck_env_info(env); struct lfsck_instance *lfsck = com->lc_lfsck; struct lfsck_assistant_data *lad = com->lc_data; struct dt_object *dir; const struct dt_it_ops *iops; struct dt_it *di; struct lu_dirent *ent = (struct lu_dirent *)info->lti_key; struct lfsck_bookmark *bk = &lfsck->li_bookmark_ram; struct ptlrpc_thread *thread = &lfsck->li_thread; struct lfsck_assistant_object *lso = NULL; struct lfsck_namespace_req *lnr; struct lfsck_assistant_req *lar; int rc; __u16 type; ENTRY; LASSERT(list_empty(&lad->lad_req_list)); lfsck->li_lmv = &llu->llu_lmv; lfsck->li_obj_dir = lfsck_object_get(llu->llu_obj); rc = lfsck_open_dir(env, lfsck, 0); if (rc != 0) RETURN(rc); dir = lfsck->li_obj_dir; di = lfsck->li_di_dir; iops = &dir->do_index_ops->dio_it; do { rc = iops->rec(env, di, (struct dt_rec *)ent, lfsck->li_args_dir); if (rc == 0) rc = lfsck_unpack_ent(ent, &lfsck->li_cookie_dir, &type); if (rc != 0) { if (bk->lb_param & LPF_FAILOUT) GOTO(out, rc); goto next; } if (name_is_dot_or_dotdot(ent->lde_name, ent->lde_namelen)) goto next; if (lso == NULL) { lso = lfsck_assistant_object_init(env, lfsck_dto2fid(dir), NULL, lfsck->li_pos_current.lp_oit_cookie, true); if (IS_ERR(lso)) { if (bk->lb_param & LPF_FAILOUT) GOTO(out, rc = PTR_ERR(lso)); lso = NULL; goto next; } } lnr = lfsck_namespace_assistant_req_init(lfsck, lso, ent, type); if (IS_ERR(lnr)) { if (bk->lb_param & LPF_FAILOUT) GOTO(out, rc = PTR_ERR(lnr)); goto next; } lar = &lnr->lnr_lar; rc = lfsck_namespace_assistant_handler_p1(env, com, lar); lfsck_namespace_assistant_req_fini(env, lar); if (rc != 0 && bk->lb_param & LPF_FAILOUT) GOTO(out, rc); if (unlikely(!thread_is_running(thread))) GOTO(out, rc = 0); next: rc = iops->next(env, di); } while (rc == 0); out: if (lso != NULL && !IS_ERR(lso)) lfsck_assistant_object_put(env, lso); lfsck_close_dir(env, lfsck, rc); if (rc <= 0) RETURN(rc); /* The close_dir() may insert a dummy lnr in the lad->lad_req_list. */ if (list_empty(&lad->lad_req_list)) RETURN(1); spin_lock(&lad->lad_lock); lar = list_entry(lad->lad_req_list.next, struct lfsck_assistant_req, lar_list); list_del_init(&lar->lar_list); spin_unlock(&lad->lad_lock); rc = lfsck_namespace_assistant_handler_p1(env, com, lar); lfsck_namespace_assistant_req_fini(env, lar); RETURN(rc == 0 ? 1 : rc); } static int lfsck_namespace_double_scan_one_trace_file(const struct lu_env *env, struct lfsck_component *com, struct dt_object *obj, bool first) { struct lfsck_instance *lfsck = com->lc_lfsck; struct ptlrpc_thread *thread = &lfsck->li_thread; struct lfsck_bookmark *bk = &lfsck->li_bookmark_ram; struct lfsck_namespace *ns = com->lc_file_ram; const struct dt_it_ops *iops = &obj->do_index_ops->dio_it; struct dt_object *target; struct dt_it *di; struct dt_key *key; struct lu_fid fid; int rc; __u8 flags = 0; ENTRY; di = iops->init(env, obj, 0); if (IS_ERR(di)) RETURN(PTR_ERR(di)); if (first) fid_cpu_to_be(&fid, &ns->ln_fid_latest_scanned_phase2); else fid_zero(&fid); rc = iops->get(env, di, (const struct dt_key *)&fid); if (rc < 0) GOTO(fini, rc); if (first) { /* The start one either has been processed or does not exist, * skip it. */ rc = iops->next(env, di); if (rc != 0) GOTO(put, rc); } do { if (CFS_FAIL_TIMEOUT(OBD_FAIL_LFSCK_DELAY3, cfs_fail_val) && unlikely(!thread_is_running(thread))) GOTO(put, rc = 0); key = iops->key(env, di); if (IS_ERR(key)) { rc = PTR_ERR(key); if (rc == -ENOENT) GOTO(put, rc = 1); goto checkpoint; } fid_be_to_cpu(&fid, (const struct lu_fid *)key); if (!fid_is_sane(&fid)) { rc = 0; goto checkpoint; } target = lfsck_object_find_bottom(env, lfsck, &fid); if (IS_ERR(target)) { rc = PTR_ERR(target); goto checkpoint; } if (dt_object_exists(target)) { rc = iops->rec(env, di, (struct dt_rec *)&flags, 0); if (rc == 0) { rc = lfsck_namespace_double_scan_one(env, com, target, flags); if (rc == -ENOENT) rc = 0; } } lfsck_object_put(env, target); checkpoint: down_write(&com->lc_sem); com->lc_new_checked++; com->lc_new_scanned++; if (rc >= 0) ns->ln_fid_latest_scanned_phase2 = fid; if (rc > 0) ns->ln_objs_repaired_phase2++; else if (rc < 0) ns->ln_objs_failed_phase2++; up_write(&com->lc_sem); if (rc < 0 && bk->lb_param & LPF_FAILOUT) GOTO(put, rc); if (unlikely(com->lc_time_next_checkpoint <= ktime_get_seconds()) && com->lc_new_checked != 0) { down_write(&com->lc_sem); ns->ln_run_time_phase2 += ktime_get_seconds() - com->lc_time_last_checkpoint; ns->ln_time_last_checkpoint = ktime_get_real_seconds(); ns->ln_objs_checked_phase2 += com->lc_new_checked; com->lc_new_checked = 0; lfsck_namespace_store(env, com); up_write(&com->lc_sem); com->lc_time_last_checkpoint = ktime_get_seconds(); com->lc_time_next_checkpoint = com->lc_time_last_checkpoint + LFSCK_CHECKPOINT_INTERVAL; } lfsck_control_speed_by_self(com); if (unlikely(!thread_is_running(thread))) GOTO(put, rc = 0); rc = iops->next(env, di); } while (rc == 0); GOTO(put, rc); put: iops->put(env, di); fini: iops->fini(env, di); return rc; } static int lfsck_namespace_assistant_handler_p2(const struct lu_env *env, struct lfsck_component *com) { struct lfsck_instance *lfsck = com->lc_lfsck; struct lfsck_namespace *ns = com->lc_file_ram; int rc; int i; ENTRY; while (!list_empty(&lfsck->li_list_lmv)) { struct lfsck_lmv_unit *llu; spin_lock(&lfsck->li_lock); llu = list_entry(lfsck->li_list_lmv.next, struct lfsck_lmv_unit, llu_link); list_del_init(&llu->llu_link); spin_unlock(&lfsck->li_lock); rc = lfsck_namespace_rescan_striped_dir(env, com, llu); if (rc <= 0) RETURN(rc); } CDEBUG(D_LFSCK, "%s: namespace LFSCK phase2 scan start\n", lfsck_lfsck2name(lfsck)); lfsck_namespace_scan_local_lpf(env, com); com->lc_new_checked = 0; com->lc_new_scanned = 0; com->lc_time_last_checkpoint = ktime_get_seconds(); com->lc_time_next_checkpoint = com->lc_time_last_checkpoint + LFSCK_CHECKPOINT_INTERVAL; i = lfsck_sub_trace_file_fid2idx(&ns->ln_fid_latest_scanned_phase2); rc = lfsck_namespace_double_scan_one_trace_file(env, com, com->lc_sub_trace_objs[i].lsto_obj, true); while (rc > 0 && ++i < LFSCK_STF_COUNT) rc = lfsck_namespace_double_scan_one_trace_file(env, com, com->lc_sub_trace_objs[i].lsto_obj, false); CDEBUG(D_LFSCK, "%s: namespace LFSCK phase2 scan stop at the No. %d " "trace file: rc = %d\n", lfsck_lfsck2name(lfsck), i, rc); RETURN(rc); } static void lfsck_namespace_assistant_fill_pos(const struct lu_env *env, struct lfsck_component *com, struct lfsck_position *pos) { struct lfsck_assistant_data *lad = com->lc_data; struct lfsck_namespace_req *lnr; if (((struct lfsck_namespace *)(com->lc_file_ram))->ln_status != LS_SCANNING_PHASE1) return; if (list_empty(&lad->lad_req_list)) return; lnr = list_entry(lad->lad_req_list.next, struct lfsck_namespace_req, lnr_lar.lar_list); pos->lp_oit_cookie = lnr->lnr_lar.lar_parent->lso_oit_cookie; pos->lp_dir_cookie = lnr->lnr_dir_cookie - 1; pos->lp_dir_parent = lnr->lnr_lar.lar_parent->lso_fid; } static int lfsck_namespace_double_scan_result(const struct lu_env *env, struct lfsck_component *com, int rc) { struct lfsck_instance *lfsck = com->lc_lfsck; struct lfsck_namespace *ns = com->lc_file_ram; down_write(&com->lc_sem); ns->ln_run_time_phase2 += ktime_get_seconds() - com->lc_time_last_checkpoint; ns->ln_time_last_checkpoint = ktime_get_real_seconds(); ns->ln_objs_checked_phase2 += com->lc_new_checked; com->lc_new_checked = 0; if (rc > 0) { if (ns->ln_flags & LF_INCOMPLETE) ns->ln_status = LS_PARTIAL; else ns->ln_status = LS_COMPLETED; ns->ln_flags &= ~LF_SCANNED_ONCE; if (!(lfsck->li_bookmark_ram.lb_param & LPF_DRYRUN)) ns->ln_flags &= ~LF_INCONSISTENT; ns->ln_time_last_complete = ns->ln_time_last_checkpoint; ns->ln_success_count++; } else if (rc == 0) { if (lfsck->li_status != 0) ns->ln_status = lfsck->li_status; else ns->ln_status = LS_STOPPED; } else { ns->ln_status = LS_FAILED; } rc = lfsck_namespace_store(env, com); up_write(&com->lc_sem); return rc; } static int lfsck_namespace_assistant_sync_failures_interpret(const struct lu_env *env, struct ptlrpc_request *req, void *args, int rc) { if (rc == 0) { struct lfsck_async_interpret_args *laia = args; struct lfsck_tgt_desc *ltd = laia->laia_ltd; ltd->ltd_synced_failures = 1; } return 0; } /** * Notify remote LFSCK instances about former failures. * * The local LFSCK instance has recorded which MDTs have ever failed to respond * some LFSCK verification requests (maybe because of network issues or the MDT * itself trouble). During the respond gap the MDT may missed some name entries * verification, then the MDT cannot know whether related MDT-objects have been * referenced by related name entries or not, then in the second-stage scanning, * these MDT-objects will be regarded as orphan, if the MDT-object contains bad * linkEA for back reference, then it will misguide the LFSCK to generate wrong * name entry for repairing the orphan. * * To avoid above trouble, when layout LFSCK finishes the first-stage scanning, * it will scan the bitmap for the ever failed MDTs, and notify them that they * have ever missed some name entries verification and should skip the handling * for orphan MDT-objects. * * \param[in] env pointer to the thread context * \param[in] com pointer to the lfsck component * \param[in] lr pointer to the lfsck request */ static void lfsck_namespace_assistant_sync_failures(const struct lu_env *env, struct lfsck_component *com, struct lfsck_request *lr) { struct lfsck_async_interpret_args *laia = &lfsck_env_info(env)->lti_laia2; struct lfsck_assistant_data *lad = com->lc_data; struct lfsck_namespace *ns = com->lc_file_ram; struct lfsck_instance *lfsck = com->lc_lfsck; struct lfsck_tgt_descs *ltds = &lfsck->li_mdt_descs; struct lfsck_tgt_desc *ltd; struct ptlrpc_request_set *set; __u32 idx; int rc = 0; ENTRY; if (!test_bit(LAD_INCOMPLETE, &lad->lad_flags)) RETURN_EXIT; set = ptlrpc_prep_set(); if (set == NULL) GOTO(out, rc = -ENOMEM); lr->lr_flags2 = ns->ln_flags | LF_INCOMPLETE; memset(laia, 0, sizeof(*laia)); lad->lad_touch_gen++; down_read(<ds->ltd_rw_sem); cfs_foreach_bit(lad->lad_bitmap, idx) { ltd = lfsck_ltd2tgt(ltds, idx); if (unlikely(!ltd)) continue; laia->laia_ltd = ltd; rc = lfsck_async_request(env, ltd->ltd_exp, lr, set, lfsck_namespace_assistant_sync_failures_interpret, laia, LFSCK_NOTIFY); if (rc != 0) CDEBUG(D_LFSCK, "%s: namespace LFSCK assistant fail " "to sync failure with MDT %x: rc = %d\n", lfsck_lfsck2name(lfsck), ltd->ltd_index, rc); } up_read(<ds->ltd_rw_sem); rc = ptlrpc_set_wait(env, set); ptlrpc_set_destroy(set); GOTO(out, rc); out: if (rc != 0) CDEBUG(D_LFSCK, "%s: namespace LFSCK assistant fail " "to sync failure with MDTs, and related MDTs " "may handle orphan improperly: rc = %d\n", lfsck_lfsck2name(lfsck), rc); EXIT; } const struct lfsck_assistant_operations lfsck_namespace_assistant_ops = { .la_handler_p1 = lfsck_namespace_assistant_handler_p1, .la_handler_p2 = lfsck_namespace_assistant_handler_p2, .la_fill_pos = lfsck_namespace_assistant_fill_pos, .la_double_scan_result = lfsck_namespace_double_scan_result, .la_req_fini = lfsck_namespace_assistant_req_fini, .la_sync_failures = lfsck_namespace_assistant_sync_failures, }; /** * Verify the specified linkEA entry for the given directory object. * If the object has no such linkEA entry or it has more other linkEA * entries, then re-generate the linkEA with the given information. * * \param[in] env pointer to the thread context * \param[in] obj pointer to the dt_object to be handled * \param[in] cname the name for the child in the parent directory * \param[in] pfid the parent directory's FID for the linkEA * * \retval 0 for success * \retval negative error number on failure */ int lfsck_verify_linkea(const struct lu_env *env, struct dt_object *obj, const struct lu_name *cname, const struct lu_fid *pfid) { struct dt_device *dev = lfsck_obj2dev(obj); struct linkea_data ldata = { NULL }; struct lu_buf linkea_buf; struct thandle *th; int rc; int fl = LU_XATTR_CREATE; bool dirty = false; ENTRY; LASSERT(S_ISDIR(lfsck_object_type(obj))); rc = lfsck_links_read_with_rec(env, obj, &ldata); if (rc == -ENODATA) { dirty = true; } else if (rc == 0) { fl = LU_XATTR_REPLACE; if (ldata.ld_leh->leh_reccount != 1) { dirty = true; } else { rc = linkea_links_find(&ldata, cname, pfid); if (rc != 0) dirty = true; } } if (!dirty) RETURN(rc); rc = linkea_links_new(&ldata, &lfsck_env_info(env)->lti_linkea_buf, cname, pfid); if (rc != 0) RETURN(rc); lfsck_buf_init(&linkea_buf, ldata.ld_buf->lb_buf, ldata.ld_leh->leh_len); th = dt_trans_create(env, dev); if (IS_ERR(th)) RETURN(PTR_ERR(th)); rc = dt_declare_xattr_set(env, obj, &linkea_buf, XATTR_NAME_LINK, fl, th); if (rc != 0) GOTO(stop, rc); rc = dt_trans_start_local(env, dev, th); if (rc != 0) GOTO(stop, rc); dt_write_lock(env, obj, 0); rc = dt_xattr_set(env, obj, &linkea_buf, XATTR_NAME_LINK, fl, th); dt_write_unlock(env, obj); GOTO(stop, rc); stop: dt_trans_stop(env, dev, th); return rc; } /** * Get the name and parent directory's FID from the first linkEA entry. * * \param[in] env pointer to the thread context * \param[in] obj pointer to the object which get linkEA from * \param[out] name pointer to the buffer to hold the name * in the first linkEA entry * \param[out] pfid pointer to the buffer to hold the parent * directory's FID in the first linkEA entry * * \retval 0 for success * \retval negative error number on failure */ int lfsck_links_get_first(const struct lu_env *env, struct dt_object *obj, char *name, struct lu_fid *pfid) { struct lu_name *cname = &lfsck_env_info(env)->lti_name; struct linkea_data ldata = { NULL }; int rc; rc = lfsck_links_read_with_rec(env, obj, &ldata); if (rc) return rc; linkea_first_entry(&ldata); linkea_entry_unpack(ldata.ld_lee, &ldata.ld_reclen, cname, pfid); if (!linkea_entry_is_valid(&ldata, cname, pfid)) return -EINVAL; /* To guarantee the 'name' is terminated with '0'. */ memcpy(name, cname->ln_name, cname->ln_namelen); name[cname->ln_namelen] = 0; return 0; } /** * Update the object's name entry with the given FID. * * \param[in] env pointer to the thread context * \param[in] lfsck pointer to the lfsck instance * \param[in] dir pointer to the directory that holds * the name entry * \param[in] name the name for the entry to be updated * \param[in] fid the new FID for the name entry referenced * \param[in] type the type for the name entry to be updated * * \retval 0 for success * \retval negative error number on failure */ int lfsck_update_name_entry(const struct lu_env *env, struct lfsck_instance *lfsck, struct dt_object *dir, const char *name, const struct lu_fid *fid, __u32 type) { struct lfsck_thread_info *info = lfsck_env_info(env); struct dt_insert_rec *rec = &info->lti_dt_rec; struct lfsck_lock_handle *llh = &info->lti_llh; struct dt_device *dev = lfsck_obj2dev(dir); struct thandle *th; int rc; bool exists = true; ENTRY; rc = lfsck_lock(env, lfsck, dir, name, llh, MDS_INODELOCK_UPDATE, LCK_PW); if (rc != 0) RETURN(rc); th = dt_trans_create(env, dev); if (IS_ERR(th)) GOTO(unlock, rc = PTR_ERR(th)); rc = dt_declare_delete(env, dir, (const struct dt_key *)name, th); if (rc != 0) GOTO(stop, rc); rec->rec_type = type; rec->rec_fid = fid; rc = dt_declare_insert(env, dir, (const struct dt_rec *)rec, (const struct dt_key *)name, th); if (rc != 0) GOTO(stop, rc); rc = dt_declare_ref_add(env, dir, th); if (rc != 0) GOTO(stop, rc); rc = dt_trans_start_local(env, dev, th); if (rc != 0) GOTO(stop, rc); rc = dt_delete(env, dir, (const struct dt_key *)name, th); if (rc == -ENOENT) { exists = false; rc = 0; } if (rc != 0) GOTO(stop, rc); rc = dt_insert(env, dir, (const struct dt_rec *)rec, (const struct dt_key *)name, th); if (rc == 0 && S_ISDIR(type) && !exists) { dt_write_lock(env, dir, 0); rc = dt_ref_add(env, dir, th); dt_write_unlock(env, dir); } GOTO(stop, rc); stop: dt_trans_stop(env, dev, th); unlock: lfsck_unlock(llh); CDEBUG(D_LFSCK, "%s: update name entry "DFID"/%s with the FID "DFID " and the type %o: rc = %d\n", lfsck_lfsck2name(lfsck), PFID(lfsck_dto2fid(dir)), name, PFID(fid), type, rc); return rc; } int lfsck_namespace_setup(const struct lu_env *env, struct lfsck_instance *lfsck) { struct lfsck_component *com; struct lfsck_namespace *ns; struct dt_object *root = NULL; struct dt_object *obj; int i; int rc; ENTRY; LASSERT(lfsck->li_master); OBD_ALLOC_PTR(com); if (com == NULL) RETURN(-ENOMEM); INIT_LIST_HEAD(&com->lc_link); INIT_LIST_HEAD(&com->lc_link_dir); init_rwsem(&com->lc_sem); atomic_set(&com->lc_ref, 1); com->lc_lfsck = lfsck; com->lc_type = LFSCK_TYPE_NAMESPACE; com->lc_ops = &lfsck_namespace_ops; com->lc_data = lfsck_assistant_data_init( &lfsck_namespace_assistant_ops, LFSCK_NAMESPACE); if (com->lc_data == NULL) GOTO(out, rc = -ENOMEM); com->lc_file_size = sizeof(struct lfsck_namespace); OBD_ALLOC(com->lc_file_ram, com->lc_file_size); if (com->lc_file_ram == NULL) GOTO(out, rc = -ENOMEM); OBD_ALLOC(com->lc_file_disk, com->lc_file_size); if (com->lc_file_disk == NULL) GOTO(out, rc = -ENOMEM); for (i = 0; i < LFSCK_STF_COUNT; i++) mutex_init(&com->lc_sub_trace_objs[i].lsto_mutex); root = dt_locate(env, lfsck->li_bottom, &lfsck->li_local_root_fid); if (IS_ERR(root)) GOTO(out, rc = PTR_ERR(root)); if (unlikely(!dt_try_as_dir(env, root))) GOTO(out, rc = -ENOTDIR); obj = local_index_find_or_create(env, lfsck->li_los, root, LFSCK_NAMESPACE, S_IFREG | S_IRUGO | S_IWUSR, &dt_lfsck_namespace_features); if (IS_ERR(obj)) GOTO(out, rc = PTR_ERR(obj)); com->lc_obj = obj; rc = lfsck_namespace_load(env, com); if (rc == -ENODATA) { rc = lfsck_namespace_init(env, com); } else if (rc < 0) { rc = lfsck_namespace_reset(env, com, true); } else { rc = lfsck_load_sub_trace_files(env, com, &dt_lfsck_namespace_features, LFSCK_NAMESPACE, false); if (rc) rc = lfsck_namespace_reset(env, com, true); } if (rc != 0) GOTO(out, rc); ns = com->lc_file_ram; switch (ns->ln_status) { case LS_INIT: case LS_COMPLETED: case LS_FAILED: case LS_STOPPED: spin_lock(&lfsck->li_lock); list_add_tail(&com->lc_link, &lfsck->li_list_idle); spin_unlock(&lfsck->li_lock); break; default: CERROR("%s: unknown lfsck_namespace status %d\n", lfsck_lfsck2name(lfsck), ns->ln_status); /* fall through */ case LS_SCANNING_PHASE1: case LS_SCANNING_PHASE2: /* No need to store the status to disk right now. * If the system crashed before the status stored, * it will be loaded back when next time. */ ns->ln_status = LS_CRASHED; /* fall through */ case LS_PAUSED: case LS_CRASHED: spin_lock(&lfsck->li_lock); list_add_tail(&com->lc_link, &lfsck->li_list_scan); list_add_tail(&com->lc_link_dir, &lfsck->li_list_dir); spin_unlock(&lfsck->li_lock); break; } GOTO(out, rc = 0); out: if (root != NULL && !IS_ERR(root)) lfsck_object_put(env, root); if (rc != 0) { lfsck_component_cleanup(env, com); CERROR("%s: fail to init namespace LFSCK component: rc = %d\n", lfsck_lfsck2name(lfsck), rc); } return rc; }