* GPL HEADER END
*/
/*
- * Copyright (c) 2012, 2013, Intel Corporation.
+ * Copyright (c) 2013, 2016, Intel Corporation.
*/
/*
* lustre/lfsck/lfsck_namespace.c
#include <lu_object.h>
#include <dt_object.h>
#include <md_object.h>
-#include <lustre_linkea.h>
#include <lustre_fid.h>
#include <lustre_lib.h>
#include <lustre_net.h>
#include "lfsck_internal.h"
-#define LFSCK_NAMESPACE_MAGIC 0xA0629D03
+#define LFSCK_NAMESPACE_MAGIC_V1 0xA0629D03
+#define LFSCK_NAMESPACE_MAGIC_V2 0xA0621A0B
-static const char lfsck_namespace_name[] = "lfsck_namespace";
+/* 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_V2
+
+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_of0(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_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_mlinked_checked = le64_to_cpu(src->ln_mlinked_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);
- dst->ln_objs_lost_found = le64_to_cpu(src->ln_objs_lost_found);
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 = le32_to_cpu(src->ln_time_latest_reset);
+ dst->ln_linkea_overflow_cleared =
+ le64_to_cpu(src->ln_linkea_overflow_cleared);
}
static void lfsck_namespace_cpu_to_le(struct lfsck_namespace *dst,
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_mlinked_checked = cpu_to_le64(src->ln_mlinked_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);
- dst->ln_objs_lost_found = cpu_to_le64(src->ln_objs_lost_found);
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_le32(src->ln_time_latest_reset);
+ dst->ln_linkea_overflow_cleared =
+ cpu_to_le64(src->ln_linkea_overflow_cleared);
+}
+
+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) {
+ lad->lad_incomplete = 0;
+ 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))
+ lad->lad_incomplete = 0;
+ else
+ lad->lad_incomplete = 1;
+
+ RETURN(0);
}
/**
- * \retval +ve: the lfsck_namespace is broken, the caller should reset it.
- * \retval 0: succeed.
- * \retval -ve: failed cases.
+ * 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)
rc = dt_xattr_get(env, com->lc_obj,
lfsck_buf_get(env, com->lc_file_disk, len),
- XATTR_NAME_LFSCK_NAMESPACE, BYPASS_CAPA);
+ 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) {
- CWARN("%s: invalid lfsck_namespace magic %#x != %#x\n",
- lfsck_lfsck2name(com->lc_lfsck), ns->ln_magic,
- LFSCK_NAMESPACE_MAGIC);
- rc = 1;
+ 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) {
- CERROR("%s: fail to load lfsck_namespace: expected = %d, "
- "rc = %d\n", lfsck_lfsck2name(com->lc_lfsck), len, rc);
+ 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 = 1;
+ rc = -ESTALE;
}
+
return rc;
}
static int lfsck_namespace_store(const struct lu_env *env,
- struct lfsck_component *com, bool init)
+ struct lfsck_component *com)
{
- struct dt_object *obj = com->lc_obj;
- struct lfsck_instance *lfsck = com->lc_lfsck;
- struct thandle *handle;
- int len = com->lc_file_size;
- int rc;
+ 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;
- lfsck_namespace_cpu_to_le((struct lfsck_namespace *)com->lc_file_disk,
- (struct lfsck_namespace *)com->lc_file_ram);
- handle = dt_trans_create(env, lfsck->li_bottom);
- if (IS_ERR(handle)) {
- rc = PTR_ERR(handle);
- CERROR("%s: fail to create trans for storing lfsck_namespace: "
- "rc = %d\n", lfsck_lfsck2name(lfsck), rc);
- RETURN(rc);
+ 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) {
- CERROR("%s: fail to declare trans for storing lfsck_namespace: "
- "rc = %d\n", lfsck_lfsck2name(lfsck), rc);
+ 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, lfsck->li_bottom, handle);
- if (rc != 0) {
- CERROR("%s: fail to start trans for storing lfsck_namespace: "
- "rc = %d\n", lfsck_lfsck2name(lfsck), 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,
- init ? LU_XATTR_CREATE : LU_XATTR_REPLACE,
- handle, BYPASS_CAPA);
- if (rc != 0)
- CERROR("%s: fail to store lfsck_namespace: len = %d, "
- "rc = %d\n", lfsck_lfsck2name(lfsck), len, rc);
+ 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, lfsck->li_bottom, handle);
+ 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;
}
memset(ns, 0, sizeof(*ns));
ns->ln_magic = LFSCK_NAMESPACE_MAGIC;
ns->ln_status = LS_INIT;
+ ns->ln_time_latest_reset = cfs_time_current_sec();
down_write(&com->lc_sem);
- rc = lfsck_namespace_store(env, com, true);
+ 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;
-}
-
-static int lfsck_namespace_lookup(const struct lu_env *env,
- struct lfsck_component *com,
- const struct lu_fid *fid, __u8 *flags)
-{
- struct lu_fid *key = &lfsck_env_info(env)->lti_fid;
- int rc;
- fid_cpu_to_be(key, fid);
- rc = dt_lookup(env, com->lc_obj, (struct dt_rec *)flags,
- (const struct dt_key *)key, BYPASS_CAPA);
return rc;
}
-static int lfsck_namespace_delete(const struct lu_env *env,
- struct lfsck_component *com,
- const struct lu_fid *fid)
+/**
+ * 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 lu_fid *key = &lfsck_env_info(env)->lti_fid;
- struct thandle *handle;
- struct dt_object *obj = com->lc_obj;
- int rc;
+ 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;
- handle = dt_trans_create(env, lfsck->li_bottom);
- if (IS_ERR(handle))
- RETURN(PTR_ERR(handle));
+ LASSERT(flags != 0);
- rc = dt_declare_delete(env, obj, (const struct dt_key *)fid, handle);
- if (rc != 0)
- GOTO(out, rc);
+ if (unlikely(!fid_is_sane(fid)))
+ RETURN(0);
- rc = dt_trans_start_local(env, lfsck->li_bottom, handle);
- if (rc != 0)
- GOTO(out, rc);
+ 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_delete(env, obj, (const struct dt_key *)key, handle,
- BYPASS_CAPA);
-
- GOTO(out, rc);
-
-out:
- dt_trans_stop(env, lfsck->li_bottom, handle);
- return rc;
-}
+ 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);
-static int lfsck_namespace_update(const struct lu_env *env,
- struct lfsck_component *com,
- const struct lu_fid *fid,
- __u8 flags, bool force)
-{
- struct lfsck_instance *lfsck = com->lc_lfsck;
- struct lu_fid *key = &lfsck_env_info(env)->lti_fid;
- struct thandle *handle;
- struct dt_object *obj = com->lc_obj;
- int rc;
- bool exist = false;
- __u8 tf;
- ENTRY;
+ new = old | flags;
+ } else {
+ if ((old & flags) == 0)
+ GOTO(unlock, rc = 0);
- rc = lfsck_namespace_lookup(env, com, fid, &tf);
- if (rc != 0 && rc != -ENOENT)
- RETURN(rc);
+ new = old & ~flags;
+ }
+ } else {
+ GOTO(log, rc);
+ }
- if (rc == 0) {
- if (!force || flags == tf)
- RETURN(0);
+ th = dt_trans_create(env, dev);
+ if (IS_ERR(th))
+ GOTO(log, rc = PTR_ERR(th));
- exist = true;
- handle = dt_trans_create(env, lfsck->li_bottom);
- if (IS_ERR(handle))
- RETURN(PTR_ERR(handle));
+ if (old != 0) {
+ rc = dt_declare_delete(env, obj,
+ (const struct dt_key *)key, th);
+ if (rc != 0)
+ GOTO(log, rc);
+ }
- rc = dt_declare_delete(env, obj, (const struct dt_key *)fid,
- handle);
+ if (new != 0) {
+ rc = dt_declare_insert(env, obj,
+ (const struct dt_rec *)&new,
+ (const struct dt_key *)key, th);
if (rc != 0)
- GOTO(out, rc);
- } else {
- handle = dt_trans_create(env, lfsck->li_bottom);
- if (IS_ERR(handle))
- RETURN(PTR_ERR(handle));
+ GOTO(log, rc);
}
- rc = dt_declare_insert(env, obj, (const struct dt_rec *)&flags,
- (const struct dt_key *)fid, handle);
+ rc = dt_trans_start_local(env, dev, th);
if (rc != 0)
- GOTO(out, rc);
+ GOTO(log, rc);
- rc = dt_trans_start_local(env, lfsck->li_bottom, handle);
- if (rc != 0)
- GOTO(out, rc);
+ if (old != 0) {
+ rc = dt_delete(env, obj, (const struct dt_key *)key, th);
+ if (rc != 0)
+ GOTO(log, rc);
+ }
- fid_cpu_to_be(key, fid);
- if (exist) {
- rc = dt_delete(env, obj, (const struct dt_key *)key, handle,
- BYPASS_CAPA);
- if (rc != 0) {
- CERROR("%s: fail to insert "DFID": rc = %d\n",
- lfsck_lfsck2name(com->lc_lfsck), PFID(fid), rc);
- GOTO(out, rc);
- }
+ if (new != 0) {
+ rc = dt_insert(env, obj, (const struct dt_rec *)&new,
+ (const struct dt_key *)key, th, 1);
+ if (rc != 0)
+ GOTO(log, rc);
}
- rc = dt_insert(env, obj, (const struct dt_rec *)&flags,
- (const struct dt_key *)key, handle, BYPASS_CAPA, 1);
+ GOTO(log, rc);
- GOTO(out, 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);
-out:
- dt_trans_stop(env, lfsck->li_bottom, handle);
return rc;
}
-static int lfsck_namespace_check_exist(const struct lu_env *env,
- struct lfsck_instance *lfsck,
- struct dt_object *obj, const char *name)
+int lfsck_namespace_check_exist(const struct lu_env *env,
+ struct dt_object *dir,
+ struct dt_object *obj, const char *name)
{
- struct dt_object *dir = lfsck->li_obj_dir;
struct lu_fid *fid = &lfsck_env_info(env)->lti_fid;
int rc;
ENTRY;
RETURN(LFSCK_NAMEENTRY_DEAD);
rc = dt_lookup(env, dir, (struct dt_rec *)fid,
- (const struct dt_key *)name, BYPASS_CAPA);
+ (const struct dt_key *)name);
if (rc == -ENOENT)
RETURN(LFSCK_NAMEENTRY_REMOVED);
{
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)
- return rc;
-
- /* For insert new linkEA entry. */
- rc = dt_declare_xattr_set(env, obj,
- lfsck_buf_get_const(env, NULL, DEFAULT_LINKEA_SIZE),
+ 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;
}
-static int lfsck_links_read(const struct lu_env *env, struct dt_object *obj,
- struct linkea_data *ldata)
+int __lfsck_links_read(const struct lu_env *env, struct dt_object *obj,
+ struct linkea_data *ldata, bool with_rec)
{
int rc;
- ldata->ld_buf =
- lu_buf_check_and_alloc(&lfsck_env_info(env)->lti_linkea_buf,
- PAGE_CACHE_SIZE);
if (ldata->ld_buf->lb_buf == NULL)
return -ENOMEM;
if (!dt_object_exists(obj))
- return -ENODATA;
+ return -ENOENT;
- rc = dt_xattr_get(env, obj, ldata->ld_buf, XATTR_NAME_LINK, BYPASS_CAPA);
+ rc = dt_xattr_get(env, obj, ldata->ld_buf, XATTR_NAME_LINK);
if (rc == -ERANGE) {
/* Buf was too small, figure out what we need. */
- lu_buf_free(ldata->ld_buf);
- rc = dt_xattr_get(env, obj, ldata->ld_buf, XATTR_NAME_LINK,
- BYPASS_CAPA);
+ rc = dt_xattr_get(env, obj, &LU_BUF_NULL, XATTR_NAME_LINK);
+ if (unlikely(rc == 0))
+ return -ENODATA;
+
if (rc < 0)
return rc;
- ldata->ld_buf = lu_buf_check_and_alloc(ldata->ld_buf, 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,
- BYPASS_CAPA);
+ rc = dt_xattr_get(env, obj, ldata->ld_buf, XATTR_NAME_LINK);
}
- if (rc < 0)
- return rc;
- linkea_init(ldata);
+ if (unlikely(rc == 0))
+ return -ENODATA;
- return 0;
+ 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)
{
- const struct lu_buf *buf = lfsck_buf_get_const(env,
- ldata->ld_buf->lb_buf,
- ldata->ld_leh->leh_len);
+ struct lu_buf buf;
+ int rc;
+
+ lfsck_buf_init(&buf, ldata->ld_buf->lb_buf, ldata->ld_leh->leh_len);
- return dt_xattr_set(env, obj, buf, XATTR_NAME_LINK, 0, handle,
- BYPASS_CAPA);
+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;
}
-/**
- * \retval ve: removed entries
- */
-static int lfsck_linkea_entry_unpack(struct lfsck_instance *lfsck,
- struct linkea_data *ldata,
- struct lu_name *cname,
- struct lu_fid *pfid)
+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(ldata->ld_reclen <= 0 ||
+ ldata->ld_reclen + sizeof(struct link_ea_header) >
+ ldata->ld_leh->leh_len ||
+ cname->ln_namelen <= 0 ||
+ cname->ln_namelen > NAME_MAX ||
+ cname->ln_namelen >= buflen ||
+ !fid_is_sane(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(ldata->ld_reclen <= 0 ||
+ ldata->ld_reclen + sizeof(struct link_ea_header) >
+ ldata->ld_leh->leh_len)) {
+ 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);
+ }
+}
+
+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 removed = 0;
+ int repeated = 0;
- linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, cname, pfid);
oldlee = ldata->ld_lee;
oldlen = ldata->ld_reclen;
linkea_next_entry(ldata);
ldata->ld_lee->lee_reclen[1];
if (unlikely(ldata->ld_reclen == oldlen &&
memcmp(ldata->ld_lee, oldlee, oldlen) == 0)) {
- linkea_del_buf(ldata, cname);
- removed++;
+ repeated++;
+ if (!remove)
+ break;
+
+ lfsck_linkea_del_buf(ldata, cname);
} else {
linkea_next_entry(ldata);
}
}
ldata->ld_lee = oldlee;
ldata->ld_reclen = oldlen;
- return removed;
+
+ return repeated;
}
/**
- * \retval +ve repaired
- * \retval 0 no need to repair
- * \retval -ve error cases
+ * 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_double_scan_one(const struct lu_env *env,
- struct lfsck_component *com,
- struct dt_object *child, __u8 flags)
+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_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_bookmark *bk = &lfsck->li_bookmark_ram;
- struct lfsck_namespace *ns = com->lc_file_ram;
- struct linkea_data ldata = { 0 };
- struct thandle *handle = NULL;
- bool locked = false;
- bool update = false;
- int rc;
+ 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;
- if (com->lc_journal) {
+ 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:
- LASSERT(!locked);
+ do {
+ namelen = snprintf(info->lti_key, NAME_MAX, DFID"%s-%s-%d",
+ PFID(cfid), infix, type, idx++);
+ rc = dt_lookup(env, parent, (struct dt_rec *)&tfid,
+ (const struct dt_key *)info->lti_key);
+ 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);
- update = false;
- com->lc_journal = 1;
- handle = dt_trans_create(env, lfsck->li_next);
- if (IS_ERR(handle))
- RETURN(rc = PTR_ERR(handle));
+ /* Re-check whether the name conflict with othrs after taken
+ * the ldlm lock. */
+ rc = dt_lookup(env, parent, (struct dt_rec *)&tfid,
+ (const struct dt_key *)info->lti_key);
+ if (rc == 0) {
+ if (!lu_fid_eq(cfid, &tfid)) {
+ exist = false;
+ lfsck_unlock(pllh);
+ goto again;
+ }
- rc = dt_declare_xattr_set(env, child,
- lfsck_buf_get_const(env, NULL, DEFAULT_LINKEA_SIZE),
- XATTR_NAME_LINK, 0, handle);
+ 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);
- rc = dt_trans_start(env, lfsck->li_next, handle);
+ 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);
-
- dt_write_lock(env, child, MOR_TGT_CHILD);
- locked = true;
}
- if (unlikely(lfsck_is_dead_obj(child)))
- GOTO(stop, rc = 0);
+ rc = dt_declare_xattr_set(env, orphan, &linkea_buf,
+ XATTR_NAME_LINK, 0, th);
+ if (rc != 0)
+ GOTO(stop, rc);
- rc = dt_attr_get(env, child, la, BYPASS_CAPA);
- if (rc == 0)
- rc = lfsck_links_read(env, child, &ldata);
- if (rc != 0) {
- if ((bk->lb_param & LPF_DRYRUN) &&
- (rc == -EINVAL || rc == -ENODATA))
- rc = 1;
+ 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);
- GOTO(stop, rc);
+ if (S_ISDIR(rec->rec_type)) {
+ rc = dt_declare_ref_add(env, parent, th);
+ if (rc != 0)
+ GOTO(stop, rc);
+ }
}
- linkea_first_entry(&ldata);
- while (ldata.ld_lee != NULL) {
- struct dt_object *parent = NULL;
-
- rc = lfsck_linkea_entry_unpack(lfsck, &ldata, cname, pfid);
- if (rc > 0)
- update = true;
+ memset(la, 0, sizeof(*la));
+ la->la_ctime = cfs_time_current_sec();
+ la->la_valid = LA_CTIME;
+ rc = dt_declare_attr_set(env, orphan, la, th);
+ if (rc != 0)
+ GOTO(stop, rc);
- if (!fid_is_sane(pfid))
- goto shrink;
+ rc = dt_trans_start_local(env, dev, th);
+ if (rc != 0)
+ GOTO(stop, rc);
- parent = lfsck_object_find(env, lfsck, pfid);
- if (parent == NULL)
- goto shrink;
- else if (IS_ERR(parent))
- GOTO(stop, rc = PTR_ERR(parent));
+ 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 (!dt_object_exists(parent))
- goto shrink;
+ if (S_ISDIR(lfsck_object_type(orphan))) {
+ rc = dt_delete(env, orphan,
+ (const struct dt_key *)dotdot, th);
+ if (rc != 0)
+ GOTO(unlock, rc);
- /* XXX: Currently, skip remote object, the consistency for
- * remote object will be processed in LFSCK phase III. */
- if (dt_object_remote(parent)) {
- lfsck_object_put(env, parent);
- linkea_next_entry(&ldata);
- continue;
+ 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, 1);
+ 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, 1);
+ 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 : "<NULL>", rc);
+
+ if (rc != 0) {
+ struct lfsck_namespace *ns = com->lc_file_ram;
+
+ ns->ln_flags |= LF_INCONSISTENT;
+ }
+
+ 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.
+ *
+ * \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] name 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 char *name)
+{
+ 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;
+ 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);
+
+ 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, name, llh,
+ MDS_INODELOCK_UPDATE, LCK_PW);
+ if (rc != 0)
+ GOTO(log, rc);
+
+ 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 *)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 = cfs_time_current_sec();
+ 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 *)name, th, 1);
+ 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);
+ }
+
+ la->la_ctime = cfs_time_current_sec();
+ 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:
+ 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), 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(env, lfsck->li_lpf_root_obj,
+ (struct dt_rec *)&tfid,
+ (const struct dt_key *)name);
+ 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 shrink;
+ GOTO(log, rc = -ENOTDIR);
+ } else {
+ if (unlikely(lfsck->li_lpf_obj == NULL))
+ GOTO(log, rc = -ENXIO);
- /* To guarantee the 'name' is terminated with '0'. */
- memcpy(info->lti_key, cname->ln_name, cname->ln_namelen);
- info->lti_key[cname->ln_namelen] = 0;
- cname->ln_name = info->lti_key;
- rc = dt_lookup(env, parent, (struct dt_rec *)cfid,
- (const struct dt_key *)cname->ln_name,
- BYPASS_CAPA);
- if (rc != 0 && rc != -ENOENT) {
- lfsck_object_put(env, parent);
+ 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(env, parent, (struct dt_rec *)&tfid,
+ (const struct dt_key *)name);
+ 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(env, parent, (struct dt_rec *)&tfid,
+ (const struct dt_key *)name);
+ 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);
- }
+ }
- if (rc == 0) {
- if (lu_fid_eq(cfid, lfsck_dto2fid(child))) {
- lfsck_object_put(env, parent);
- linkea_next_entry(&ldata);
- continue;
- }
+ 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);
- goto shrink;
- }
+ 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 there is no name entry in the parent dir and the object
- * link count is less than the linkea entries count, then the
- * linkea entry should be removed. */
- if (ldata.ld_leh->leh_reccount > la->la_nlink)
- goto shrink;
-
- /* XXX: For the case of there is a linkea entry, but without
- * name entry pointing to the object and its hard links
- * count is not less than the object name entries count,
- * then seems we should add the 'missed' name entry back
- * to namespace, but before LFSCK phase III finished, we
- * do not know whether the object has some inconsistency
- * on other MDTs. So now, do NOT add the name entry back
- * to the namespace, but keep the linkEA entry. LU-2914 */
+ 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, 1);
+ 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, 1);
+ 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, 1);
+ 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 : "<NULL>", rc);
+
+ if (parent != NULL && !IS_ERR(parent) && parent != lfsck->li_lpf_obj)
lfsck_object_put(env, parent);
- linkea_next_entry(&ldata);
- continue;
-shrink:
- if (parent != NULL)
- lfsck_object_put(env, parent);
- if (bk->lb_param & LPF_DRYRUN)
- RETURN(1);
+ 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);
+
+ if (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);
+ goto again;
+ }
+
+ if (ldata_new.ld_leh->leh_reccount > 0 ||
+ unlikely(ldata->ld_leh->leh_overflow_time))
+ 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(env, parent, (struct dt_rec *)&tfid,
+ (const struct dt_key *)name);
+ 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, 1);
+
+ 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);
+ const struct lu_fid *cfid = lfsck_dto2fid(child);
+ 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;
+
+ 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;
+ 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(env, parent, (struct dt_rec *)&tfid,
+ (const struct dt_key *)name);
+ /* 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, 1);
+ 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 && 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, 1);
+ 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, 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->ln_name);
+ 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(env, parent, (struct dt_rec *)&tfid,
+ (const struct dt_key *)cname->ln_name);
+ 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, 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->ln_name);
+ 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))
+ RETURN(PTR_ERR(parent));
+
+ 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(env, parent, (struct dt_rec *)&tfid,
+ (const struct dt_key *)cname->ln_name);
+ *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 <parent, child> 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(env, child, (struct dt_rec *)pfid,
+ (const struct dt_key *)dotdot);
+ 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;
+}
+
+#define lfsck_time_before(a, b) \
+ (typecheck(__u32, a) && \
+ typecheck(__u32, b) && \
+ ((int)(a) - (int)(b) < 0))
+
+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 &&
+ lfsck_time_before(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;
+}
+
+/**
+ * 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);
+
+ 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))
+ GOTO(out, rc = PTR_ERR(parent));
+
+ 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->ln_name);
+ 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(env, parent, (struct dt_rec *)cfid,
+ (const struct dt_key *)cname->ln_name);
+ 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, 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->ln_name);
+ 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;
+ }
+
+ return rc;
+}
+
+static void lfsck_namespace_dump_statistics(struct seq_file *m,
+ struct lfsck_namespace *ns,
+ __u64 checked_phase1,
+ __u64 checked_phase2,
+ __u32 time_phase1,
+ __u32 time_phase2)
+{
+ seq_printf(m, "checked_phase1: %llu\n"
+ "checked_phase2: %llu\n"
+ "updated_phase1: %llu\n"
+ "updated_phase2: %llu\n"
+ "failed_phase1: %llu\n"
+ "failed_phase2: %llu\n"
+ "directories: %llu\n"
+ "dirent_repaired: %llu\n"
+ "linkea_repaired: %llu\n"
+ "nlinks_repaired: %llu\n"
+ "multiple_linked_checked: %llu\n"
+ "multiple_linked_repaired: %llu\n"
+ "unknown_inconsistency: %llu\n"
+ "unmatched_pairs_repaired: %llu\n"
+ "dangling_repaired: %llu\n"
+ "multiple_referenced_repaired: %llu\n"
+ "bad_file_type_repaired: %llu\n"
+ "lost_dirent_repaired: %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_repaired: %llu\n"
+ "striped_dirs_failed: %llu\n"
+ "striped_dirs_disabled: %llu\n"
+ "striped_dirs_skipped: %llu\n"
+ "striped_shards_scanned: %llu\n"
+ "striped_shards_repaired: %llu\n"
+ "striped_shards_failed: %llu\n"
+ "striped_shards_skipped: %llu\n"
+ "name_hash_repaired: %llu\n"
+ "linkea_overflow_cleared: %llu\n"
+ "success_count: %u\n"
+ "run_time_phase1: %u seconds\n"
+ "run_time_phase2: %u seconds\n",
+ checked_phase1,
+ checked_phase2,
+ ns->ln_items_repaired,
+ ns->ln_objs_repaired_phase2,
+ ns->ln_items_failed,
+ ns->ln_objs_failed_phase2,
+ ns->ln_dirs_checked,
+ ns->ln_dirent_repaired,
+ ns->ln_linkea_repaired,
+ ns->ln_objs_nlink_repaired,
+ ns->ln_mul_linked_checked,
+ ns->ln_mul_linked_repaired,
+ ns->ln_unknown_inconsistency,
+ ns->ln_unmatched_pairs_repaired,
+ ns->ln_dangling_repaired,
+ ns->ln_mul_ref_repaired,
+ ns->ln_bad_type_repaired,
+ 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,
+ 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,
+ ns->ln_striped_shards_repaired,
+ ns->ln_striped_shards_failed,
+ ns->ln_striped_shards_skipped,
+ ns->ln_name_hash_repaired,
+ ns->ln_linkea_overflow_cleared,
+ 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;
+ __u64 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 = cfs_time_current_sec();
+
+ 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);
+
+ lad->lad_incomplete = 0;
+ 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;
+ __u32 size =
+ sizeof(*lnr) + LFSCK_TMPBUF_LEN;
+ bool wakeup = false;
+ ENTRY;
+
+ if (llmv == NULL)
+ 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),
+ NULL, 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;
+
+ spin_lock(&lad->lad_lock);
+ if (lad->lad_assistant_status < 0) {
+ 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_all(&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 += cfs_duration_sec(cfs_time_current() +
+ HALF_SEC - lfsck->li_time_last_checkpoint);
+ ns->ln_time_last_checkpoint = cfs_time_current_sec();
+ 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 = cfs_time_current_sec();
+ 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);
+ int rc;
+ ENTRY;
+
+ 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 == -ENODATA || unlikely(!ldata.ld_leh->leh_reccount)) {
+ rc = lfsck_namespace_check_for_double_scan(env, com, obj);
+
+ GOTO(out, rc);
+ }
+
+ if (rc != 0)
+ 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);
+ }
+
+ linkea_first_entry(&ldata);
+ 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 {
+ fld_range_set_mdt(range);
+ rc = fld_local_lookup(env, ss->ss_server_fld,
+ fid_seq(pfid), range);
+ if ((rc == -ENOENT) ||
+ (rc == 0 && range->lsr_index != idx))
+ 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;
+ struct l_wait_info lwi = { 0 };
+ bool wakeup = false;
+
+ l_wait_event(mthread->t_ctl_waitq,
+ lad->lad_prefetched < bk->lb_async_windows ||
+ !thread_is_running(mthread) ||
+ thread_is_stopped(athread),
+ &lwi);
+
+ if (unlikely(!thread_is_running(mthread)) ||
+ thread_is_stopped(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) {
+ 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_all(&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 += cfs_duration_sec(cfs_time_current() +
+ HALF_SEC - lfsck->li_time_last_checkpoint);
+ ns->ln_time_last_checkpoint = cfs_time_current_sec();
+ 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;
+ const struct dt_it_ops *iops;
+ cfs_duration_t duration = cfs_time_current() -
+ 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 *
+ msecs_to_jiffies(MSEC_PER_SEC);
+ __u32 rtime = ns->ln_run_time_phase1 +
+ cfs_duration_sec(duration + HALF_SEC);
+
+ if (duration != 0)
+ do_div(new_checked, duration);
+
+ if (rtime != 0)
+ do_div(speed, rtime);
+
+ lfsck_namespace_dump_statistics(m, ns, checked, 0, rtime, 0);
+ 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);
+
+ LASSERT(lfsck->li_di_oit != NULL);
+
+ 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 != NULL) {
+ 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);
+ lfsck_pos_dump(m, &pos, "current_position");
+ } else if (ns->ln_status == LS_SCANNING_PHASE2) {
+ cfs_duration_t duration = cfs_time_current() -
+ 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 *
+ msecs_to_jiffies(MSEC_PER_SEC);
+ __u32 rtime = ns->ln_run_time_phase2 +
+ cfs_duration_sec(duration + HALF_SEC);
+ __u32 time0 = ns->ln_run_time_phase1 + rtime;
+
+ if (duration != 0)
+ do_div(new_checked, duration);
+
+ if (ns->ln_run_time_phase1 != 0)
+ do_div(speed1, ns->ln_run_time_phase1);
+ else if (ns->ln_items_checked != 0)
+ time0++;
+
+ if (rtime != 0)
+ do_div(speed2, rtime);
+ else if (checked != 0)
+ time0++;
+
+ if (time0 != 0)
+ do_div(speed0, time0);
+
+ lfsck_namespace_dump_statistics(m, ns, ns->ln_items_checked,
+ checked,
+ ns->ln_run_time_phase1, rtime);
+ 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;
+ __u32 time0 = ns->ln_run_time_phase1 + ns->ln_run_time_phase2;
+
+ if (ns->ln_run_time_phase1 != 0)
+ do_div(speed1, ns->ln_run_time_phase1);
+ else if (ns->ln_items_checked != 0)
+ time0++;
+
+ if (ns->ln_run_time_phase2 != 0)
+ do_div(speed2, ns->ln_run_time_phase2);
+ else if (ns->ln_objs_checked_phase2 != 0)
+ time0++;
+
+ if (time0 != 0)
+ do_div(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);
+ 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 thandle *th)
+{
+ 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_all(&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);
- CDEBUG(D_LFSCK, "Remove linkEA: "DFID"[%.*s], "DFID"\n",
- PFID(lfsck_dto2fid(child)), cname->ln_namelen, cname->ln_name,
- PFID(pfid));
- linkea_del_buf(&ldata, cname);
- update = true;
+ mdts_count[ltd->ltd_namespace_status]++;
+ *repaired += ltd->ltd_namespace_repaired;
}
+ up_read(<ds->ltd_rw_sem);
- if (update) {
- if (!com->lc_journal) {
- com->lc_journal = 1;
- goto again;
- }
+ down_read(&com->lc_sem);
+ mdts_count[ns->ln_status]++;
+ lfsck_namespace_repaired(ns, repaired);
+ up_read(&com->lc_sem);
- rc = lfsck_links_write(env, child, &ldata, handle);
- }
+ RETURN(0);
+}
- GOTO(stop, rc);
+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;
-stop:
- if (locked) {
- /* XXX: For the case linkea entries count does not match the object hard
- * links count, we cannot update the later one simply. Before LFSCK
- * phase III finished, we cannot know whether there are some remote
- * name entries to be repaired or not. LU-2914 */
- if (rc == 0 && !lfsck_is_dead_obj(child) &&
- ldata.ld_leh != NULL &&
- ldata.ld_leh->leh_reccount != la->la_nlink)
- CWARN("%s: the object "DFID" linkEA entry count %u "
- "may not match its hardlink count %u\n",
- lfsck_lfsck2name(lfsck), PFID(cfid),
- ldata.ld_leh->leh_reccount, la->la_nlink);
-
- dt_write_unlock(env, child);
- }
-
- if (handle != NULL)
- dt_trans_stop(env, lfsck->li_next, handle);
-
- if (rc == 0 && update) {
- ns->ln_objs_nlink_repaired++;
- rc = 1;
+ 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;
}
-/* namespace APIs */
+static 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,
+};
-static int lfsck_namespace_reset(const struct lu_env *env,
- struct lfsck_component *com, bool init)
+/**
+ * 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_instance *lfsck = com->lc_lfsck;
- struct lfsck_namespace *ns = com->lc_file_ram;
- struct dt_object *root;
- struct dt_object *dto;
- int rc;
+ 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 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;
- root = dt_locate(env, lfsck->li_bottom, &lfsck->li_local_root_fid);
- if (IS_ERR(root))
- RETURN(PTR_ERR(root));
+ 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 (unlikely(!dt_try_as_dir(env, root))) {
- lu_object_put(env, &root->do_lu);
- RETURN(-ENOTDIR);
- }
+ if (!create || bk->lb_param & LPF_DRYRUN)
+ GOTO(log, rc = 0);
- down_write(&com->lc_sem);
- if (init) {
- memset(ns, 0, sizeof(*ns));
- } else {
- __u32 count = ns->ln_success_count;
- __u64 last_time = ns->ln_time_last_complete;
+ /* We may need to create the sub-objects of the @child via LOD,
+ * so make the modification based on lfsck->li_next. */
- 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;
+ parent = lfsck_object_locate(dev, parent);
+ if (IS_ERR(parent))
+ GOTO(log, rc = PTR_ERR(parent));
- rc = local_object_unlink(env, lfsck->li_bottom, root,
- lfsck_namespace_name);
- if (rc != 0)
- GOTO(out, rc);
+ if (unlikely(!dt_try_as_dir(env, parent)))
+ GOTO(log, rc = -ENOTDIR);
- lfsck_object_put(env, com->lc_obj);
- com->lc_obj = NULL;
- dto = local_index_find_or_create(env, lfsck->li_los, root,
- lfsck_namespace_name,
- S_IFREG | S_IRUGO | S_IWUSR,
- &dt_lfsck_features);
- if (IS_ERR(dto))
- GOTO(out, rc = PTR_ERR(dto));
+ child = lfsck_object_locate(dev, child);
+ if (IS_ERR(child))
+ GOTO(log, rc = PTR_ERR(child));
- com->lc_obj = dto;
- rc = dto->do_ops->do_index_try(env, dto, &dt_lfsck_features);
+ rc = linkea_links_new(&ldata, &info->lti_linkea_buf2,
+ cname, pfid);
if (rc != 0)
- GOTO(out, rc);
+ GOTO(log, rc);
- rc = lfsck_namespace_store(env, com, true);
+ rc = lfsck_lock(env, lfsck, parent, lnr->lnr_name, llh,
+ MDS_INODELOCK_UPDATE, LCK_PR);
+ if (rc != 0)
+ GOTO(log, rc);
- GOTO(out, rc);
+ rc = lfsck_namespace_check_exist(env, parent, child, lnr->lnr_name);
+ if (rc != 0)
+ GOTO(log, 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));
+ la->la_mode = (type & S_IFMT) | 0600;
+ la->la_valid = LA_TYPE | LA_MODE | LA_UID | LA_GID |
+ LA_ATIME | LA_MTIME | LA_CTIME;
+
+ child->do_ops->do_ah_init(env, hint, parent, child,
+ la->la_mode & S_IFMT);
+
+ 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(log, rc = PTR_ERR(th));
+
+ /* 1a. create child. */
+ rc = dt_declare_create(env, child, la, hint, dof, th);
+ if (rc != 0)
+ GOTO(stop, rc);
-out:
- up_write(&com->lc_sem);
- lu_object_put(env, &root->do_lu);
- return rc;
-}
+ if (S_ISDIR(type)) {
+ if (unlikely(!dt_try_as_dir(env, child)))
+ GOTO(stop, rc = -ENOTDIR);
-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;
+ /* 2a. increase child nlink */
+ rc = dt_declare_ref_add(env, child, th);
+ if (rc != 0)
+ GOTO(stop, rc);
- down_write(&com->lc_sem);
- if (new_checked)
- com->lc_new_checked++;
- ns->ln_items_failed++;
- if (lfsck_pos_is_zero(&ns->ln_pos_first_inconsistent))
- lfsck_pos_fill(env, com->lc_lfsck,
- &ns->ln_pos_first_inconsistent, false);
- up_write(&com->lc_sem);
-}
+ /* 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);
-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;
+ /* 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);
- if (com->lc_new_checked == 0 && !init)
- return 0;
+ /* 5a. generate slave LMV EA. */
+ if (lnr->lnr_lmv != NULL && lnr->lnr_lmv->ll_lmv_master) {
+ int idx;
- down_write(&com->lc_sem);
+ idx = lfsck_shard_name_to_index(env,
+ lnr->lnr_name, lnr->lnr_namelen,
+ type, cfid);
+ if (unlikely(idx < 0))
+ GOTO(stop, rc = idx);
- if (init) {
- ns->ln_pos_latest_start = lfsck->li_pos_current;
- } else {
- ns->ln_pos_last_checkpoint = lfsck->li_pos_current;
- ns->ln_run_time_phase1 += cfs_duration_sec(cfs_time_current() +
- HALF_SEC - lfsck->li_time_last_checkpoint);
- ns->ln_time_last_checkpoint = cfs_time_current_sec();
- ns->ln_items_checked += com->lc_new_checked;
- com->lc_new_checked = 0;
- }
+ *lmv2 = lnr->lnr_lmv->ll_lmv;
+ lmv2->lmv_magic = LMV_MAGIC_STRIPE;
+ lmv2->lmv_master_mdt_index = idx;
- rc = lfsck_namespace_store(env, com, false);
+ 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);
+ }
+ }
- up_write(&com->lc_sem);
- return 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);
-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;
+ rc = dt_trans_start_local(env, dev, th);
+ if (rc != 0)
+ GOTO(stop, rc = (rc == -EEXIST ? 1 : rc));
- if (ns->ln_status == LS_COMPLETED) {
- int 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));
- rc = lfsck_namespace_reset(env, com, false);
+ if (S_ISDIR(type)) {
+ /* 2b. increase child nlink */
+ rc = dt_ref_add(env, child, th);
if (rc != 0)
- return rc;
- }
+ GOTO(unlock, rc);
- down_write(&com->lc_sem);
+ /* 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, 1);
+ if (rc != 0)
+ GOTO(unlock, rc);
- ns->ln_time_latest_start = cfs_time_current_sec();
+ /* 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, 1);
+ if (rc != 0)
+ GOTO(unlock, rc);
- 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;
- cfs_list_del_init(&com->lc_link);
- cfs_list_add_tail(&com->lc_link,
- &lfsck->li_list_double_scan);
- if (!cfs_list_empty(&com->lc_link_dir))
- cfs_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_mlinked_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_objs_lost_found = 0;
- fid_zero(&ns->ln_fid_latest_scanned_phase2);
- if (cfs_list_empty(&com->lc_link_dir))
- cfs_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 (cfs_list_empty(&com->lc_link_dir))
- cfs_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;
+ /* 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);
}
}
- spin_unlock(&lfsck->li_lock);
- up_write(&com->lc_sem);
- return 0;
-}
+ /* 6b. insert linkEA for child. */
+ rc = dt_xattr_set(env, child, &linkea_buf,
+ XATTR_NAME_LINK, 0, th);
-static int lfsck_namespace_exec_oit(const struct lu_env *env,
- struct lfsck_component *com,
- struct dt_object *obj)
-{
- down_write(&com->lc_sem);
- com->lc_new_checked++;
- if (S_ISDIR(lfsck_object_type(obj)))
- ((struct lfsck_namespace *)com->lc_file_ram)->ln_dirs_checked++;
- up_write(&com->lc_sem);
- return 0;
+ GOTO(unlock, rc);
+
+unlock:
+ dt_write_unlock(env, child);
+
+stop:
+ dt_trans_stop(env, dev, th);
+
+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_exec_dir(const struct lu_env *env,
- struct lfsck_component *com,
- struct dt_object *obj,
- struct lu_dirent *ent)
+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 linkea_data ldata = { 0 };
- const struct lu_fid *pfid = lfsck_dto2fid(lfsck->li_obj_dir);
- const struct lu_fid *cfid = lfsck_dto2fid(obj);
+ 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_of0(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 locked = false;
+ bool dtlocked = false;
bool remove;
bool newdata;
+ bool log = false;
+ bool bad_hash = false;
+ bool bad_linkea = false;
+ int idx = 0;
int count = 0;
- int rc;
+ int rc = 0;
+ enum lfsck_namespace_inconsistency_type type = LNIT_NONE;
ENTRY;
- cname = lfsck_name_get_const(env, ent->lde_name, ent->lde_namelen);
- down_write(&com->lc_sem);
- com->lc_new_checked++;
+ if (lso->lso_dead)
+ RETURN(0);
- if (ent->lde_attrs & LUDA_UPGRADE) {
+ la->la_nlink = 0;
+ if (lnr->lnr_attr & LUDA_UPGRADE) {
ns->ln_flags |= LF_UPGRADE;
ns->ln_dirent_repaired++;
repaired = true;
- } else if (ent->lde_attrs & LUDA_REPAIR) {
+ } else if (lnr->lnr_attr & LUDA_REPAIR) {
ns->ln_flags |= LF_INCONSISTENT;
ns->ln_dirent_repaired++;
repaired = true;
}
- if (ent->lde_name[0] == '.' &&
- (ent->lde_namelen == 1 ||
- (ent->lde_namelen == 2 && ent->lde_name[1] == '.') ||
- fid_is_dot_lustre(&ent->lde_fid)))
+ if (unlikely(fid_is_zero(&lnr->lnr_fid))) {
+ if (strcmp(lnr->lnr_name, dotdot) != 0)
+ LBUG();
+ else
+ 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 (!(bk->lb_param & LPF_DRYRUN) &&
- (com->lc_journal || repaired)) {
+ 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:
- LASSERT(!locked);
+ rc = lfsck_ibits_lock(env, lfsck, obj, &lh,
+ MDS_INODELOCK_UPDATE |
+ MDS_INODELOCK_XATTR, LCK_EX);
+ if (rc != 0)
+ GOTO(out, rc);
- com->lc_journal = 1;
- handle = dt_trans_create(env, lfsck->li_next);
+ handle = dt_trans_create(env, dev);
if (IS_ERR(handle))
GOTO(out, rc = PTR_ERR(handle));
if (rc != 0)
GOTO(stop, rc);
- rc = dt_trans_start(env, lfsck->li_next, handle);
+ rc = dt_trans_start_local(env, dev, handle);
if (rc != 0)
GOTO(stop, rc);
- dt_write_lock(env, obj, MOR_TGT_CHILD);
- locked = true;
+ dt_write_lock(env, obj, 0);
+ dtlocked = true;
}
- rc = lfsck_namespace_check_exist(env, lfsck, obj, ent->lde_name);
- if (rc != 0)
- GOTO(stop, rc);
-
rc = lfsck_links_read(env, obj, &ldata);
- if (rc == 0) {
+ 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))))
- goto record;
+ (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;
+ }
- ns->ln_flags |= LF_INCONSISTENT;
- /* For dir, if there are more than one linkea entries, or the
- * linkea entry does not match the name entry, then remove all
- * and add the correct one. */
- if (S_ISDIR(lfsck_object_type(obj))) {
- remove = true;
- newdata = true;
- } else {
- remove = false;
- newdata = false;
+ 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;
- ns->ln_flags |= LF_INCONSISTENT;
/* 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;
- ns->ln_flags |= LF_UPGRADE;
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;
- goto record;
+ log = true;
+ goto stop;
}
- if (!com->lc_journal)
+ 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,
- BYPASS_CAPA);
- if (rc != 0)
+ rc = dt_xattr_del(env, obj, XATTR_NAME_LINK, handle);
+ if (rc != 0 && rc != -ENOENT && rc != -ENODATA)
GOTO(stop, rc);
}
}
rc = linkea_add_buf(&ldata, cname, pfid);
- if (rc != 0)
- GOTO(stop, rc);
-
- rc = lfsck_links_write(env, obj, &ldata, handle);
+ if (rc == 0)
+ rc = lfsck_links_write(env, obj, &ldata, handle);
if (rc != 0)
GOTO(stop, rc);
count = ldata.ld_leh->leh_reccount;
- ns->ln_linkea_repaired++;
- repaired = true;
+ if (!S_ISDIR(lfsck_object_type(obj)) ||
+ !dt_object_remote(obj)) {
+ ns->ln_linkea_repaired++;
+ repaired = true;
+ log = true;
+ }
} else {
GOTO(stop, rc);
}
-record:
- LASSERT(count > 0);
+stop:
+ if (dtlocked)
+ dt_write_unlock(env, obj);
- rc = dt_attr_get(env, obj, la, BYPASS_CAPA);
- if (rc != 0)
- GOTO(stop, rc);
+ if (handle != NULL && !IS_ERR(handle))
+ dt_trans_stop(env, dev, handle);
- if ((count == 1) &&
- (la->la_nlink == 1 || S_ISDIR(lfsck_object_type(obj))))
- /* Usually, it is for single linked object or dir, do nothing.*/
- GOTO(stop, rc);
+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;
- /* Following modification will be in another transaction. */
- if (handle != NULL) {
- LASSERT(dt_write_locked(env, obj));
+ log = false;
+ if (dir == NULL) {
+ dir = lfsck_assistant_object_load(env, lfsck, lso);
+ if (IS_ERR(dir)) {
+ rc = PTR_ERR(dir);
- dt_write_unlock(env, obj);
- locked = false;
+ GOTO(trace, rc == -ENOENT ? 0 : rc);
+ }
+ }
- dt_trans_stop(env, lfsck->li_next, handle);
- handle = NULL;
+ rc = lfsck_namespace_repair_bad_name_hash(env, com, dir,
+ lnr->lnr_lmv, lnr->lnr_name);
+ if (rc == 0)
+ bad_hash = true;
}
- ns->ln_mlinked_checked++;
- rc = lfsck_namespace_update(env, com, cfid,
- count != la->la_nlink ? LLF_UNMATCH_NLINKS : 0, false);
+ 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(out, rc);
+ GOTO(trace, rc == -ENOENT ? 0 : rc);
+ }
+ }
-stop:
- if (locked)
- dt_write_unlock(env, obj);
+ 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 (handle != NULL)
- dt_trans_stop(env, lfsck->li_next, handle);
+ if (obj != NULL && count == 1 &&
+ S_ISREG(lfsck_object_type(obj)))
+ dt_attr_get(env, obj, la);
+ }
-out:
+trace:
+ down_write(&com->lc_sem);
if (rc < 0) {
- ns->ln_items_failed++;
- if (lfsck_pos_is_zero(&ns->ln_pos_first_inconsistent))
- lfsck_pos_fill(env, lfsck,
- &ns->ln_pos_first_inconsistent, false);
+ 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);
- } else {
- com->lc_journal = 0;
}
+
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;
}
-static int lfsck_namespace_post(const struct lu_env *env,
- struct lfsck_component *com,
- int result, bool init)
+/**
+ * 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_instance *lfsck = com->lc_lfsck;
- struct lfsck_namespace *ns = com->lc_file_ram;
- int rc;
+ 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;
- down_write(&com->lc_sem);
+ child = lfsck_object_find_by_dev(env, dev, &ent->lde_fid);
+ if (IS_ERR(child))
+ RETURN(PTR_ERR(child));
- spin_lock(&lfsck->li_lock);
- if (!init)
- ns->ln_pos_last_checkpoint = lfsck->li_pos_current;
- if (result > 0) {
- ns->ln_status = LS_SCANNING_PHASE2;
- ns->ln_flags |= LF_SCANNED_ONCE;
- ns->ln_flags &= ~LF_UPGRADE;
- cfs_list_del_init(&com->lc_link);
- cfs_list_del_init(&com->lc_link_dir);
- cfs_list_add_tail(&com->lc_link, &lfsck->li_list_double_scan);
- } else if (result == 0) {
- ns->ln_status = lfsck->li_status;
- if (ns->ln_status == 0)
- ns->ln_status = LS_STOPPED;
- if (ns->ln_status != LS_PAUSED) {
- cfs_list_del_init(&com->lc_link);
- cfs_list_del_init(&com->lc_link_dir);
- cfs_list_add_tail(&com->lc_link, &lfsck->li_list_idle);
- }
+ 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 {
- ns->ln_status = LS_FAILED;
- cfs_list_del_init(&com->lc_link);
- cfs_list_del_init(&com->lc_link_dir);
- cfs_list_add_tail(&com->lc_link, &lfsck->li_list_idle);
+ GOTO(out, rc);
}
- spin_unlock(&lfsck->li_lock);
- if (!init) {
- ns->ln_run_time_phase1 += cfs_duration_sec(cfs_time_current() +
- HALF_SEC - lfsck->li_time_last_checkpoint);
- ns->ln_time_last_checkpoint = cfs_time_current_sec();
- ns->ln_items_checked += com->lc_new_checked;
- com->lc_new_checked = 0;
+ 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);
}
- rc = lfsck_namespace_store(env, com, false);
+ /* 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, 1);
+
+ GOTO(stop, rc = (rc == 0 ? 1 : rc));
+
+stop:
+ dt_trans_stop(env, dev, th);
+
+out:
+ lfsck_object_put(env, child);
- up_write(&com->lc_sem);
return rc;
}
-static int
-lfsck_namespace_dump(const struct lu_env *env, struct lfsck_component *com,
- char *buf, int len)
+/**
+ * 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_instance *lfsck = com->lc_lfsck;
- struct lfsck_bookmark *bk = &lfsck->li_bookmark_ram;
- struct lfsck_namespace *ns = com->lc_file_ram;
- int save = len;
- int ret = -ENOSPC;
- int rc;
+ 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;
- down_read(&com->lc_sem);
- rc = snprintf(buf, len,
- "name: lfsck_namespace\n"
- "magic: %#x\n"
- "version: %d\n"
- "status: %s\n",
- ns->ln_magic,
- bk->lb_version,
- lfsck_status2names(ns->ln_status));
- if (rc <= 0)
- goto out;
+ 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;
+ }
- buf += rc;
- len -= rc;
- rc = lfsck_bits_dump(&buf, &len, ns->ln_flags, lfsck_flags_names,
- "flags");
- if (rc < 0)
- goto out;
+ /* It is normal that the /lost+found does not exist for ZFS backend. */
+ if (!dt_object_exists(parent))
+ GOTO(out, rc = 0);
- rc = lfsck_bits_dump(&buf, &len, bk->lb_param, lfsck_param_names,
- "param");
- if (rc < 0)
- goto out;
+ if (unlikely(!dt_try_as_dir(env, parent)))
+ GOTO(out, rc = -ENOTDIR);
- rc = lfsck_time_dump(&buf, &len, ns->ln_time_last_complete,
- "time_since_last_completed");
- if (rc < 0)
- goto out;
+ CDEBUG(D_LFSCK, "%s: start to scan backend /lost+found\n",
+ lfsck_lfsck2name(lfsck));
- rc = lfsck_time_dump(&buf, &len, ns->ln_time_latest_start,
- "time_since_latest_start");
- if (rc < 0)
- goto out;
+ 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 = lfsck_time_dump(&buf, &len, ns->ln_time_last_checkpoint,
- "time_since_last_checkpoint");
- if (rc < 0)
- goto out;
+ rc = iops->load(env, di, 0);
+ if (rc == 0)
+ rc = iops->next(env, di);
+ else if (rc > 0)
+ rc = 0;
- rc = lfsck_pos_dump(&buf, &len, &ns->ln_pos_latest_start,
- "latest_start_position");
- if (rc < 0)
- goto out;
+ while (rc == 0) {
+ if (CFS_FAIL_TIMEOUT(OBD_FAIL_LFSCK_DELAY3, cfs_fail_val) &&
+ unlikely(!thread_is_running(thread)))
+ break;
- rc = lfsck_pos_dump(&buf, &len, &ns->ln_pos_last_checkpoint,
- "last_checkpoint_position");
- if (rc < 0)
- goto out;
+ rc = iops->rec(env, di, (struct dt_rec *)ent,
+ LUDA_64BITHASH | LUDA_TYPE);
+ if (rc == 0)
+ rc = lfsck_unpack_ent(ent, &cookie, &type);
- rc = lfsck_pos_dump(&buf, &len, &ns->ln_pos_first_inconsistent,
- "first_failure_position");
- if (rc < 0)
- goto out;
+ if (unlikely(rc != 0)) {
+ CDEBUG(D_LFSCK, "%s: fail to iterate backend "
+ "/lost+found: rc = %d\n",
+ lfsck_lfsck2name(lfsck), rc);
- if (ns->ln_status == LS_SCANNING_PHASE1) {
- struct lfsck_position pos;
- const struct dt_it_ops *iops;
- cfs_duration_t duration = cfs_time_current() -
- 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 * HZ;
- __u32 rtime = ns->ln_run_time_phase1 +
- cfs_duration_sec(duration + HALF_SEC);
+ goto skip;
+ }
- if (duration != 0)
- do_div(new_checked, duration);
- if (rtime != 0)
- do_div(speed, rtime);
- rc = snprintf(buf, len,
- "checked_phase1: "LPU64"\n"
- "checked_phase2: "LPU64"\n"
- "updated_phase1: "LPU64"\n"
- "updated_phase2: "LPU64"\n"
- "failed_phase1: "LPU64"\n"
- "failed_phase2: "LPU64"\n"
- "dirs: "LPU64"\n"
- "M-linked: "LPU64"\n"
- "dirent_repaired: "LPU64"\n"
- "linkea_repaired: "LPU64"\n"
- "nlinks_repaired: "LPU64"\n"
- "lost_found: "LPU64"\n"
- "success_count: %u\n"
- "run_time_phase1: %u seconds\n"
- "run_time_phase2: %u seconds\n"
- "average_speed_phase1: "LPU64" items/sec\n"
- "average_speed_phase2: N/A\n"
- "real-time_speed_phase1: "LPU64" items/sec\n"
- "real-time_speed_phase2: N/A\n",
- checked,
- ns->ln_objs_checked_phase2,
- ns->ln_items_repaired,
- ns->ln_objs_repaired_phase2,
- ns->ln_items_failed,
- ns->ln_objs_failed_phase2,
- ns->ln_dirs_checked,
- ns->ln_mlinked_checked,
- ns->ln_dirent_repaired,
- ns->ln_linkea_repaired,
- ns->ln_objs_nlink_repaired,
- ns->ln_objs_lost_found,
- ns->ln_success_count,
- rtime,
- ns->ln_run_time_phase2,
- speed,
- new_checked);
- if (rc <= 0)
- goto out;
+ /* skip dot and dotdot entries */
+ if (name_is_dot_or_dotdot(ent->lde_name, ent->lde_namelen))
+ goto next;
- buf += rc;
- len -= rc;
+ if (!fid_seq_in_fldb(fid_seq(&ent->lde_fid)))
+ goto skip;
- LASSERT(lfsck->li_di_oit != NULL);
+ 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;
+ }
- iops = &lfsck->li_obj_oit->do_index_ops->dio_it;
+ rc = lfsck_namespace_scan_local_lpf_one(env, com, parent, ent);
- /* 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--;
+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);
- spin_lock(&lfsck->li_lock);
- if (lfsck->li_di_dir != NULL) {
- 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;
+ 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;
+ }
}
- spin_unlock(&lfsck->li_lock);
- rc = lfsck_pos_dump(&buf, &len, &pos, "current_position");
- if (rc <= 0)
- goto out;
- } else if (ns->ln_status == LS_SCANNING_PHASE2) {
- cfs_duration_t duration = cfs_time_current() -
- lfsck->li_time_last_checkpoint;
- __u64 checked = ns->ln_objs_checked_phase2 +
- com->lc_new_checked;
- __u64 speed1 = ns->ln_items_checked;
- __u64 speed2 = checked;
- __u64 new_checked = com->lc_new_checked * HZ;
- __u32 rtime = ns->ln_run_time_phase2 +
- cfs_duration_sec(duration + HALF_SEC);
- if (duration != 0)
- do_div(new_checked, duration);
- if (ns->ln_run_time_phase1 != 0)
- do_div(speed1, ns->ln_run_time_phase1);
- if (rtime != 0)
- do_div(speed2, rtime);
- rc = snprintf(buf, len,
- "checked_phase1: "LPU64"\n"
- "checked_phase2: "LPU64"\n"
- "updated_phase1: "LPU64"\n"
- "updated_phase2: "LPU64"\n"
- "failed_phase1: "LPU64"\n"
- "failed_phase2: "LPU64"\n"
- "dirs: "LPU64"\n"
- "M-linked: "LPU64"\n"
- "dirent_repaired: "LPU64"\n"
- "linkea_repaired: "LPU64"\n"
- "nlinks_repaired: "LPU64"\n"
- "lost_found: "LPU64"\n"
- "success_count: %u\n"
- "run_time_phase1: %u seconds\n"
- "run_time_phase2: %u seconds\n"
- "average_speed_phase1: "LPU64" items/sec\n"
- "average_speed_phase2: "LPU64" objs/sec\n"
- "real-time_speed_phase1: N/A\n"
- "real-time_speed_phase2: "LPU64" objs/sec\n"
- "current_position: "DFID"\n",
- ns->ln_items_checked,
- checked,
- ns->ln_items_repaired,
- ns->ln_objs_repaired_phase2,
- ns->ln_items_failed,
- ns->ln_objs_failed_phase2,
- ns->ln_dirs_checked,
- ns->ln_mlinked_checked,
- ns->ln_dirent_repaired,
- ns->ln_linkea_repaired,
- ns->ln_objs_nlink_repaired,
- ns->ln_objs_lost_found,
- ns->ln_success_count,
- ns->ln_run_time_phase1,
- rtime,
- speed1,
- speed2,
- new_checked,
- PFID(&ns->ln_fid_latest_scanned_phase2));
- if (rc <= 0)
- goto out;
+ 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));
- buf += rc;
- len -= rc;
- } else {
- __u64 speed1 = ns->ln_items_checked;
- __u64 speed2 = ns->ln_objs_checked_phase2;
+ goto next;
+ }
- if (ns->ln_run_time_phase1 != 0)
- do_div(speed1, ns->ln_run_time_phase1);
- if (ns->ln_run_time_phase2 != 0)
- do_div(speed2, ns->ln_run_time_phase2);
- rc = snprintf(buf, len,
- "checked_phase1: "LPU64"\n"
- "checked_phase2: "LPU64"\n"
- "updated_phase1: "LPU64"\n"
- "updated_phase2: "LPU64"\n"
- "failed_phase1: "LPU64"\n"
- "failed_phase2: "LPU64"\n"
- "dirs: "LPU64"\n"
- "M-linked: "LPU64"\n"
- "dirent_repaired: "LPU64"\n"
- "linkea_repaired: "LPU64"\n"
- "nlinks_repaired: "LPU64"\n"
- "lost_found: "LPU64"\n"
- "success_count: %u\n"
- "run_time_phase1: %u seconds\n"
- "run_time_phase2: %u seconds\n"
- "average_speed_phase1: "LPU64" items/sec\n"
- "average_speed_phase2: "LPU64" objs/sec\n"
- "real-time_speed_phase1: N/A\n"
- "real-time_speed_phase2: N/A\n"
- "current_position: N/A\n",
- ns->ln_items_checked,
- ns->ln_objs_checked_phase2,
- ns->ln_items_repaired,
- ns->ln_objs_repaired_phase2,
- ns->ln_items_failed,
- ns->ln_objs_failed_phase2,
- ns->ln_dirs_checked,
- ns->ln_mlinked_checked,
- ns->ln_dirent_repaired,
- ns->ln_linkea_repaired,
- ns->ln_objs_nlink_repaired,
- ns->ln_objs_lost_found,
- ns->ln_success_count,
- ns->ln_run_time_phase1,
- ns->ln_run_time_phase2,
- speed1,
- speed2);
- if (rc <= 0)
- goto out;
+ 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);
- buf += rc;
- len -= rc;
- }
- ret = save - len;
+ if (unlikely(!thread_is_running(thread)))
+ GOTO(out, rc = 0);
+
+next:
+ rc = iops->next(env, di);
+ } while (rc == 0);
out:
- up_read(&com->lc_sem);
- return ret;
+ 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_main(void *args)
+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_thread_args *lta = args;
- const struct lu_env *env = <a->lta_env;
- struct lfsck_component *com = lta->lta_com;
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 *obj = com->lc_obj;
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;
+ __u8 flags = 0;
ENTRY;
- com->lc_new_checked = 0;
- com->lc_new_scanned = 0;
- com->lc_time_last_checkpoint = cfs_time_current();
- com->lc_time_next_checkpoint = com->lc_time_last_checkpoint +
- cfs_time_seconds(LFSCK_CHECKPOINT_INTERVAL);
-
- di = iops->init(env, obj, 0, BYPASS_CAPA);
+ di = iops->init(env, obj, 0);
if (IS_ERR(di))
- GOTO(out, rc = PTR_ERR(di));
+ RETURN(PTR_ERR(di));
- fid_cpu_to_be(&fid, &ns->ln_fid_latest_scanned_phase2);
+ 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);
- /* Skip the start one, which either has been processed or non-exist. */
- rc = iops->next(env, di);
- if (rc != 0)
- GOTO(put, rc);
-
- if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_NO_DOUBLESCAN))
- GOTO(put, rc = 0);
+ 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 (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_DELAY3) &&
- cfs_fail_val > 0) {
- struct l_wait_info lwi;
+ 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);
- lwi = LWI_TIMEOUT(cfs_time_seconds(cfs_fail_val),
- NULL, NULL);
- l_wait_event(thread->t_ctl_waitq,
- !thread_is_running(thread),
- &lwi);
+ goto checkpoint;
}
- key = iops->key(env, di);
fid_be_to_cpu(&fid, (const struct lu_fid *)key);
- target = lfsck_object_find(env, lfsck, &fid);
- down_write(&com->lc_sem);
- if (target == NULL) {
+ if (!fid_is_sane(&fid)) {
rc = 0;
goto checkpoint;
- } else if (IS_ERR(target)) {
+ }
+
+ target = lfsck_object_find_bottom(env, lfsck, &fid);
+ if (IS_ERR(target)) {
rc = PTR_ERR(target);
goto checkpoint;
}
- /* XXX: Currently, skip remote object, the consistency for
- * remote object will be processed in LFSCK phase III. */
- if (dt_object_exists(target) && !dt_object_remote(target)) {
+ if (dt_object_exists(target)) {
rc = iops->rec(env, di, (struct dt_rec *)&flags, 0);
- if (rc == 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++;
- ns->ln_fid_latest_scanned_phase2 = fid;
+ 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) || ((rc > 0) && !(bk->lb_param & LPF_DRYRUN))) {
- lfsck_namespace_delete(env, com, &fid);
- } else if (rc < 0) {
- flags |= LLF_REPAIR_FAILED;
- lfsck_namespace_update(env, com, &fid, flags, true);
- }
-
if (rc < 0 && bk->lb_param & LPF_FAILOUT)
GOTO(put, rc);
ns->ln_time_last_checkpoint = cfs_time_current_sec();
ns->ln_objs_checked_phase2 += com->lc_new_checked;
com->lc_new_checked = 0;
- rc = lfsck_namespace_store(env, com, false);
+ lfsck_namespace_store(env, com);
up_write(&com->lc_sem);
- if (rc != 0)
- GOTO(put, rc);
com->lc_time_last_checkpoint = cfs_time_current();
com->lc_time_next_checkpoint =
fini:
iops->fini(env, di);
-out:
+ 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 = cfs_time_current();
+ com->lc_time_next_checkpoint = com->lc_time_last_checkpoint +
+ cfs_time_seconds(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 += cfs_duration_sec(cfs_time_current() +
- HALF_SEC - lfsck->li_time_last_checkpoint);
+ HALF_SEC - com->lc_time_last_checkpoint);
ns->ln_time_last_checkpoint = cfs_time_current_sec();
ns->ln_objs_checked_phase2 += com->lc_new_checked;
com->lc_new_checked = 0;
if (rc > 0) {
- com->lc_journal = 0;
- ns->ln_status = LS_COMPLETED;
- if (!(bk->lb_param & LPF_DRYRUN))
+ if (ns->ln_flags & LF_INCOMPLETE)
+ ns->ln_status = LS_PARTIAL;
+ else
+ ns->ln_status = LS_COMPLETED;
+ if (!(lfsck->li_bookmark_ram.lb_param & LPF_DRYRUN))
ns->ln_flags &= ~(LF_SCANNED_ONCE | LF_INCONSISTENT);
ns->ln_time_last_complete = ns->ln_time_last_checkpoint;
ns->ln_success_count++;
} else if (rc == 0) {
- ns->ln_status = lfsck->li_status;
- if (ns->ln_status == 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, false);
+ rc = lfsck_namespace_store(env, com);
up_write(&com->lc_sem);
- if (atomic_dec_and_test(&lfsck->li_double_scan_count))
- wake_up_all(&thread->t_ctl_waitq);
-
- lfsck_thread_args_fini(lta);
return rc;
}
-static int lfsck_namespace_double_scan(const struct lu_env *env,
- struct lfsck_component *com)
+static int
+lfsck_namespace_assistant_sync_failures_interpret(const struct lu_env *env,
+ struct ptlrpc_request *req,
+ void *args, int rc)
{
- struct lfsck_instance *lfsck = com->lc_lfsck;
- struct lfsck_namespace *ns = com->lc_file_ram;
- struct lfsck_thread_args *lta;
- long 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 (unlikely(ns->ln_status != LS_SCANNING_PHASE2))
- RETURN(0);
+ if (!lad->lad_incomplete)
+ 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);
+ LASSERT(ltd != NULL);
- lta = lfsck_thread_args_init(lfsck, com, NULL);
- if (IS_ERR(lta))
- RETURN(PTR_ERR(lta));
+ 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(set);
+ ptlrpc_set_destroy(set);
+
+ GOTO(out, rc);
- atomic_inc(&lfsck->li_double_scan_count);
- rc = PTR_ERR(kthread_run(lfsck_namespace_double_scan_main, lta,
- "lfsck_namespace"));
- if (IS_ERR_VALUE(rc)) {
- CERROR("%s: cannot start LFSCK namespace thread: rc = %ld\n",
+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);
- atomic_dec(&lfsck->li_double_scan_count);
- lfsck_thread_args_fini(lta);
- } else {
- rc = 0;
+
+ EXIT;
+}
+
+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;
+ }
}
- RETURN(rc);
+ 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;
}
-static int lfsck_namespace_in_notify(const struct lu_env *env,
- struct lfsck_component *com,
- struct lfsck_request *lr)
+/**
+ * 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);
+ /* To guarantee the 'name' is terminated with '0'. */
+ memcpy(name, cname->ln_name, cname->ln_namelen);
+ name[cname->ln_namelen] = 0;
+
return 0;
}
-static int lfsck_namespace_query(const struct lu_env *env,
- struct lfsck_component *com)
+/**
+ * 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_namespace *ns = com->lc_file_ram;
+ 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;
- return ns->ln_status;
-}
+ rc = lfsck_lock(env, lfsck, dir, name, llh,
+ MDS_INODELOCK_UPDATE, LCK_PW);
+ if (rc != 0)
+ RETURN(rc);
-static struct lfsck_operations lfsck_namespace_ops = {
- .lfsck_reset = lfsck_namespace_reset,
- .lfsck_fail = lfsck_namespace_fail,
- .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_in_notify = lfsck_namespace_in_notify,
- .lfsck_query = lfsck_namespace_query,
-};
+ 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, 1);
+ 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_namespace *ns;
struct dt_object *root = NULL;
struct dt_object *obj;
+ int i;
int rc;
ENTRY;
if (com == NULL)
RETURN(-ENOMEM);
- CFS_INIT_LIST_HEAD(&com->lc_link);
- CFS_INIT_LIST_HEAD(&com->lc_link_dir);
+ 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 = LT_NAMESPACE;
+ 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)
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));
GOTO(out, rc = -ENOTDIR);
obj = local_index_find_or_create(env, lfsck->li_los, root,
- lfsck_namespace_name,
+ LFSCK_NAMESPACE,
S_IFREG | S_IRUGO | S_IWUSR,
- &dt_lfsck_features);
+ &dt_lfsck_namespace_features);
if (IS_ERR(obj))
GOTO(out, rc = PTR_ERR(obj));
com->lc_obj = obj;
- rc = obj->do_ops->do_index_try(env, obj, &dt_lfsck_features);
- if (rc != 0)
- GOTO(out, rc);
-
rc = lfsck_namespace_load(env, com);
- if (rc > 0)
- rc = lfsck_namespace_reset(env, com, true);
- else if (rc == -ENODATA)
+ 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 != 0)
GOTO(out, rc);
case LS_FAILED:
case LS_STOPPED:
spin_lock(&lfsck->li_lock);
- cfs_list_add_tail(&com->lc_link, &lfsck->li_list_idle);
+ list_add_tail(&com->lc_link, &lfsck->li_list_idle);
spin_unlock(&lfsck->li_lock);
break;
default:
- CERROR("%s: unknown lfsck_namespace status: rc = %u\n",
+ CERROR("%s: unknown lfsck_namespace status %d\n",
lfsck_lfsck2name(lfsck), ns->ln_status);
/* fall through */
case LS_SCANNING_PHASE1:
case LS_PAUSED:
case LS_CRASHED:
spin_lock(&lfsck->li_lock);
- cfs_list_add_tail(&com->lc_link, &lfsck->li_list_scan);
- cfs_list_add_tail(&com->lc_link_dir, &lfsck->li_list_dir);
+ 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;
}
out:
if (root != NULL && !IS_ERR(root))
- lu_object_put(env, &root->do_lu);
- if (rc != 0)
+ 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;
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff