lfsck_component_put(env, com);
}
+int lfsck_fid_alloc(const struct lu_env *env, struct lfsck_instance *lfsck,
+ struct lu_fid *fid, bool locked)
+{
+ struct lfsck_bookmark *bk = &lfsck->li_bookmark_ram;
+ int rc = 0;
+ ENTRY;
+
+ if (!locked)
+ mutex_lock(&lfsck->li_mutex);
+
+ rc = seq_client_alloc_fid(env, lfsck->li_seq, fid);
+ if (rc >= 0) {
+ bk->lb_last_fid = *fid;
+ /* We do not care about whether the subsequent sub-operations
+ * failed or not. The worst case is that one FID is lost that
+ * is not a big issue for the LFSCK since it is relative rare
+ * for LFSCK create. */
+ rc = lfsck_bookmark_store(env, lfsck);
+ }
+
+ if (!locked)
+ mutex_unlock(&lfsck->li_mutex);
+
+ RETURN(rc);
+}
+
+static const char dot[] = ".";
+static const char dotdot[] = "..";
+
+static int lfsck_create_lpf_local(const struct lu_env *env,
+ struct lfsck_instance *lfsck,
+ struct dt_object *parent,
+ struct dt_object *child,
+ struct lu_attr *la,
+ struct dt_object_format *dof,
+ const char *name)
+{
+ struct dt_device *dev = lfsck->li_bottom;
+ struct lfsck_bookmark *bk = &lfsck->li_bookmark_ram;
+ struct dt_object *bk_obj = lfsck->li_bookmark_obj;
+ const struct lu_fid *cfid = lu_object_fid(&child->do_lu);
+ struct thandle *th = NULL;
+ loff_t pos = 0;
+ int len = sizeof(struct lfsck_bookmark);
+ int rc = 0;
+ ENTRY;
+
+ th = dt_trans_create(env, dev);
+ if (IS_ERR(th))
+ RETURN(PTR_ERR(th));
+
+ /* 1a. create child */
+ rc = dt_declare_create(env, child, la, NULL, dof, th);
+ if (rc != 0)
+ GOTO(stop, rc);
+
+ /* 2a. increase child nlink */
+ rc = dt_declare_ref_add(env, child, th);
+ if (rc != 0)
+ GOTO(stop, rc);
+
+ /* 3a. insert name into parent dir */
+ rc = dt_declare_insert(env, parent, (const struct dt_rec *)cfid,
+ (const struct dt_key *)name, th);
+ if (rc != 0)
+ GOTO(stop, rc);
+
+ /* 4a. increase parent nlink */
+ rc = dt_declare_ref_add(env, parent, th);
+ if (rc != 0)
+ GOTO(stop, rc);
+
+ /* 5a. update bookmark */
+ rc = dt_declare_record_write(env, bk_obj, len, 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, child, 0);
+ /* 1b.1 create child */
+ rc = dt_create(env, child, la, NULL, dof, th);
+ if (rc != 0)
+ GOTO(unlock, rc);
+
+ if (unlikely(!dt_try_as_dir(env, child)))
+ GOTO(unlock, rc = -ENOTDIR);
+
+ /* 1b.2 insert dot into child dir */
+ rc = dt_insert(env, child, (const struct dt_rec *)cfid,
+ (const struct dt_key *)dot, th, BYPASS_CAPA, 1);
+ if (rc != 0)
+ GOTO(unlock, rc);
+
+ /* 1b.3 insert dotdot into child dir */
+ rc = dt_insert(env, child, (const struct dt_rec *)&LU_LPF_FID,
+ (const struct dt_key *)dotdot, th, BYPASS_CAPA, 1);
+ if (rc != 0)
+ GOTO(unlock, rc);
+
+ /* 2b. increase child nlink */
+ rc = dt_ref_add(env, child, th);
+ dt_write_unlock(env, child);
+ if (rc != 0)
+ GOTO(stop, rc);
+
+ /* 3b. insert name into parent dir */
+ rc = dt_insert(env, parent, (const struct dt_rec *)cfid,
+ (const struct dt_key *)name, th, BYPASS_CAPA, 1);
+ if (rc != 0)
+ GOTO(stop, rc);
+
+ dt_write_lock(env, parent, 0);
+ /* 4b. increase parent nlink */
+ rc = dt_ref_add(env, parent, th);
+ dt_write_unlock(env, parent);
+ if (rc != 0)
+ GOTO(stop, rc);
+
+ bk->lb_lpf_fid = *cfid;
+ lfsck_bookmark_cpu_to_le(&lfsck->li_bookmark_disk, bk);
+
+ /* 5b. update bookmark */
+ rc = dt_record_write(env, bk_obj,
+ lfsck_buf_get(env, bk, len), &pos, th);
+
+ GOTO(stop, rc);
+
+unlock:
+ dt_write_unlock(env, child);
+
+stop:
+ dt_trans_stop(env, dev, th);
+
+ return rc;
+}
+
+static int lfsck_create_lpf_remote(const struct lu_env *env,
+ struct lfsck_instance *lfsck,
+ struct dt_object *parent,
+ struct dt_object *child,
+ struct lu_attr *la,
+ struct dt_object_format *dof,
+ const char *name)
+{
+ struct lfsck_bookmark *bk = &lfsck->li_bookmark_ram;
+ struct dt_object *bk_obj = lfsck->li_bookmark_obj;
+ const struct lu_fid *cfid = lu_object_fid(&child->do_lu);
+ struct thandle *th = NULL;
+ struct dt_device *dev;
+ loff_t pos = 0;
+ int len = sizeof(struct lfsck_bookmark);
+ int rc = 0;
+ ENTRY;
+
+ /* Create .lustre/lost+found/MDTxxxx. */
+
+ /* XXX: Currently, cross-MDT create operation needs to create the child
+ * object firstly, then insert name into the parent directory. For
+ * this case, the child object resides on current MDT (local), but
+ * the parent ".lustre/lost+found" may be on remote MDT. It is not
+ * easy to contain all the sub-modifications orderly within single
+ * transaction.
+ *
+ * To avoid more inconsistency, we split the create operation into
+ * two transactions:
+ *
+ * 1) create the child locally.
+ * 2) insert the name "MDTXXXX" in the parent ".lustre/lost+found"
+ * remotely and update the lfsck_bookmark::lb_lpf_fid locally.
+ *
+ * If 1) done but 2) failed, then the worst case is that we lose
+ * one object locally, which is not a big issue. (can be repaird
+ * by LFSCK phase III) */
+
+ /* Transaction I: */
+
+ dev = lfsck->li_bottom;
+ th = dt_trans_create(env, dev);
+ if (IS_ERR(th))
+ RETURN(PTR_ERR(th));
+
+ /* 1a. create child locally. */
+ rc = dt_declare_create(env, child, la, NULL, dof, th);
+ if (rc != 0)
+ GOTO(stop, rc);
+
+ /* 2a. increase child nlink locally. */
+ rc = dt_declare_ref_add(env, child, 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, child, 0);
+ /* 1b. create child locally. */
+ rc = dt_create(env, child, la, NULL, dof, th);
+ if (rc != 0)
+ GOTO(unlock, rc);
+
+ if (unlikely(!dt_try_as_dir(env, child)))
+ GOTO(unlock, rc = -ENOTDIR);
+
+ /* 2b.1 insert dot into child dir locally. */
+ rc = dt_insert(env, child, (const struct dt_rec *)cfid,
+ (const struct dt_key *)dot, th, BYPASS_CAPA, 1);
+ if (rc != 0)
+ GOTO(unlock, rc);
+
+ /* 2b.2 insert dotdot into child dir locally. */
+ rc = dt_insert(env, child, (const struct dt_rec *)&LU_LPF_FID,
+ (const struct dt_key *)dotdot, th, BYPASS_CAPA, 1);
+ if (rc != 0)
+ GOTO(unlock, rc);
+
+ /* 2b.3 increase child nlink locally. */
+ rc = dt_ref_add(env, child, th);
+ dt_write_unlock(env, child);
+ dt_trans_stop(env, dev, th);
+ if (rc != 0)
+ RETURN(rc);
+
+ /* Transaction II: */
+
+ dev = lfsck->li_next;
+ th = dt_trans_create(env, dev);
+ if (IS_ERR(th))
+ RETURN(PTR_ERR(th));
+
+ /* 3a. insert name into parent dir remotely. */
+ rc = dt_declare_insert(env, parent, (const struct dt_rec *)cfid,
+ (const struct dt_key *)name, th);
+ if (rc != 0)
+ GOTO(stop, rc);
+
+ /* 4a. increase parent nlink remotely. */
+ rc = dt_declare_ref_add(env, parent, th);
+ if (rc != 0)
+ GOTO(stop, rc);
+
+ /* 5a. decrease child nlink for dotdot locally if former remote
+ * update failed. */
+ rc = dt_declare_ref_del(env, child, th);
+ if (rc != 0)
+ GOTO(stop, rc);
+
+ /* 6a. decrease child nlink for dot locally if former remote
+ * update failed. */
+ rc = dt_declare_ref_del(env, child, th);
+ if (rc != 0)
+ GOTO(stop, rc);
+
+ /* 7a. destroy child locally if former remote update failed. */
+ rc = dt_declare_destroy(env, child, th);
+ if (rc != 0)
+ GOTO(stop, rc);
+
+ /* 8a. update bookmark locally. */
+ rc = dt_declare_record_write(env, bk_obj, len, 0, th);
+ if (rc != 0)
+ GOTO(stop, rc);
+
+ rc = dt_trans_start(env, dev, th);
+ if (rc != 0)
+ GOTO(stop, rc);
+
+ /* 3b. insert name into parent dir remotely. */
+ rc = dt_insert(env, parent, (const struct dt_rec *)cfid,
+ (const struct dt_key *)name, th, BYPASS_CAPA, 1);
+ if (rc == 0) {
+ dt_write_lock(env, parent, 0);
+ /* 4b. increase parent nlink remotely. */
+ rc = dt_ref_add(env, parent, th);
+ dt_write_unlock(env, parent);
+ }
+ if (rc != 0) {
+ /* 5b. decrease child nlink for dotdot locally. */
+ dt_ref_del(env, child, th);
+ /* 6b. decrease child nlink for dot locally. */
+ dt_ref_del(env, child, th);
+ /* 7b. destroy child locally. */
+ dt_destroy(env, child, th);
+ GOTO(stop, rc);
+ }
+
+ bk->lb_lpf_fid = *cfid;
+ lfsck_bookmark_cpu_to_le(&lfsck->li_bookmark_disk, bk);
+
+ /* 8b. update bookmark locally. */
+ rc = dt_record_write(env, bk_obj,
+ lfsck_buf_get(env, bk, len), &pos, th);
+
+ GOTO(stop, rc);
+
+unlock:
+ dt_write_unlock(env, child);
+stop:
+ dt_trans_stop(env, dev, th);
+
+ return rc;
+}
+
+/* Do NOT create .lustre/lost+found/MDTxxxx when register the lfsck instance,
+ * because the MDT0 maybe not reaady for sequence allocation yet. We do that
+ * only when it is required, such as orphan OST-objects repairing. */
+int lfsck_create_lpf(const struct lu_env *env, struct lfsck_instance *lfsck)
+{
+ struct lfsck_bookmark *bk = &lfsck->li_bookmark_ram;
+ struct lfsck_thread_info *info = lfsck_env_info(env);
+ struct lu_fid *cfid = &info->lti_fid2;
+ struct lu_attr *la = &info->lti_la;
+ struct dt_object_format *dof = &info->lti_dof;
+ struct dt_object *parent = NULL;
+ struct dt_object *child = NULL;
+ char name[8];
+ int node = lfsck_dev_idx(lfsck->li_bottom);
+ int rc = 0;
+ ENTRY;
+
+ LASSERT(lfsck->li_master);
+
+ sprintf(name, "MDT%04x", node);
+ if (node == 0) {
+ parent = lfsck_object_find_by_dev(env, lfsck->li_bottom,
+ &LU_LPF_FID);
+ } else {
+ struct lfsck_tgt_desc *ltd;
+
+ ltd = lfsck_tgt_get(&lfsck->li_mdt_descs, 0);
+ if (unlikely(ltd == NULL))
+ RETURN(-ENODEV);
+
+ parent = lfsck_object_find_by_dev(env, ltd->ltd_tgt,
+ &LU_LPF_FID);
+ lfsck_tgt_put(ltd);
+ }
+ if (IS_ERR(parent))
+ RETURN(PTR_ERR(parent));
+
+ if (unlikely(!dt_try_as_dir(env, parent)))
+ GOTO(out, rc = -ENOTDIR);
+
+ mutex_lock(&lfsck->li_mutex);
+ if (lfsck->li_lpf_obj != NULL)
+ GOTO(unlock, rc = 0);
+
+ if (fid_is_zero(&bk->lb_lpf_fid)) {
+ /* There is corner case that: in former LFSCK scanning we have
+ * created the .lustre/lost+found/MDTxxxx but failed to update
+ * the lfsck_bookmark::lb_lpf_fid successfully. So need lookup
+ * it from MDT0 firstly. */
+ rc = dt_lookup(env, parent, (struct dt_rec *)cfid,
+ (const struct dt_key *)name, BYPASS_CAPA);
+ if (rc != 0 && rc != -ENOENT)
+ GOTO(unlock, rc);
+
+ if (rc == 0) {
+ bk->lb_lpf_fid = *cfid;
+ rc = lfsck_bookmark_store(env, lfsck);
+ } else {
+ rc = lfsck_fid_alloc(env, lfsck, cfid, true);
+ }
+ if (rc != 0)
+ GOTO(unlock, rc);
+ } else {
+ *cfid = bk->lb_lpf_fid;
+ }
+
+ child = lfsck_object_find_by_dev(env, lfsck->li_bottom, cfid);
+ if (IS_ERR(child))
+ GOTO(unlock, rc = PTR_ERR(child));
+
+ if (dt_object_exists(child) != 0) {
+ if (unlikely(!dt_try_as_dir(env, child)))
+ GOTO(unlock, rc = -ENOTDIR);
+
+ lfsck->li_lpf_obj = child;
+ GOTO(unlock, rc = 0);
+ }
+
+ memset(la, 0, sizeof(*la));
+ la->la_atime = la->la_mtime = la->la_ctime = cfs_time_current_sec();
+ la->la_mode = S_IFDIR | S_IRWXU;
+ la->la_valid = LA_ATIME | LA_MTIME | LA_CTIME | LA_MODE |
+ LA_UID | LA_GID;
+ memset(dof, 0, sizeof(*dof));
+ dof->dof_type = dt_mode_to_dft(S_IFDIR);
+
+ if (node == 0)
+ rc = lfsck_create_lpf_local(env, lfsck, parent, child, la,
+ dof, name);
+ else
+ rc = lfsck_create_lpf_remote(env, lfsck, parent, child, la,
+ dof, name);
+ if (rc == 0)
+ lfsck->li_lpf_obj = child;
+
+ GOTO(unlock, rc);
+
+unlock:
+ mutex_unlock(&lfsck->li_mutex);
+ if (rc != 0 && child != NULL && !IS_ERR(child))
+ lu_object_put(env, &child->do_lu);
+out:
+ if (parent != NULL && !IS_ERR(parent))
+ lu_object_put(env, &parent->do_lu);
+
+ return rc;
+}
+
+static int lfsck_fid_init(struct lfsck_instance *lfsck)
+{
+ struct lfsck_bookmark *bk = &lfsck->li_bookmark_ram;
+ struct seq_server_site *ss;
+ char *prefix;
+ int rc = 0;
+ ENTRY;
+
+ ss = lu_site2seq(lfsck->li_bottom->dd_lu_dev.ld_site);
+ if (unlikely(ss == NULL))
+ RETURN(-ENODEV);
+
+ OBD_ALLOC_PTR(lfsck->li_seq);
+ if (lfsck->li_seq == NULL)
+ RETURN(-ENOMEM);
+
+ OBD_ALLOC(prefix, MAX_OBD_NAME + 7);
+ if (prefix == NULL)
+ GOTO(out, rc = -ENOMEM);
+
+ snprintf(prefix, MAX_OBD_NAME + 7, "lfsck-%s", lfsck_lfsck2name(lfsck));
+ rc = seq_client_init(lfsck->li_seq, NULL, LUSTRE_SEQ_METADATA, prefix,
+ ss->ss_server_seq);
+ OBD_FREE(prefix, MAX_OBD_NAME + 7);
+ if (rc != 0)
+ GOTO(out, rc);
+
+ if (fid_is_sane(&bk->lb_last_fid))
+ lfsck->li_seq->lcs_fid = bk->lb_last_fid;
+
+ RETURN(0);
+
+out:
+ OBD_FREE_PTR(lfsck->li_seq);
+ lfsck->li_seq = NULL;
+
+ return rc;
+}
+
+static void lfsck_fid_fini(struct lfsck_instance *lfsck)
+{
+ if (lfsck->li_seq != NULL) {
+ seq_client_fini(lfsck->li_seq);
+ OBD_FREE_PTR(lfsck->li_seq);
+ lfsck->li_seq = NULL;
+ }
+}
+
void lfsck_instance_cleanup(const struct lu_env *env,
struct lfsck_instance *lfsck)
{
lfsck->li_bookmark_obj = NULL;
}
+ if (lfsck->li_lpf_obj != NULL) {
+ lu_object_put(env, &lfsck->li_lpf_obj->do_lu);
+ lfsck->li_lpf_obj = NULL;
+ }
+
if (lfsck->li_los != NULL) {
local_oid_storage_fini(env, lfsck->li_los);
lfsck->li_los = NULL;
}
+ lfsck_fid_fini(lfsck);
+
OBD_FREE_PTR(lfsck);
}
GOTO(out, rc);
if (master) {
+ rc = lfsck_fid_init(lfsck);
+ if (rc < 0)
+ GOTO(out, rc);
+
rc = lfsck_namespace_setup(env, lfsck);
if (rc < 0)
GOTO(out, rc);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff