+/**
+ * Lookup an existing OI by the given name.
+ */
+static int
+osd_oi_lookup(const struct lu_env *env, struct osd_device *o,
+ uint64_t parent, const char *name, struct osd_oi *oi)
+{
+ struct zpl_direntry *zde = &osd_oti_get(env)->oti_zde.lzd_reg;
+ int rc;
+
+ rc = -zap_lookup(o->od_objset.os, parent, name, 8, 1, (void *)zde);
+ if (rc)
+ return rc;
+
+ strncpy(oi->oi_name, name, OSD_OI_NAME_SIZE - 1);
+ oi->oi_zapid = zde->zde_dnode;
+
+ return rc;
+}
+
+/**
+ * Create a new OI with the given name.
+ */
+static int
+osd_oi_create(const struct lu_env *env, struct osd_device *o,
+ uint64_t parent, const char *name, uint64_t *child)
+{
+ struct zpl_direntry *zde = &osd_oti_get(env)->oti_zde.lzd_reg;
+ struct lu_attr *la = &osd_oti_get(env)->oti_la;
+ dmu_buf_t *db;
+ dmu_tx_t *tx;
+ int rc;
+
+ /* verify it doesn't already exist */
+ rc = -zap_lookup(o->od_objset.os, parent, name, 8, 1, (void *)zde);
+ if (rc == 0)
+ return -EEXIST;
+
+ /* create fid-to-dnode index */
+ tx = dmu_tx_create(o->od_objset.os);
+ if (tx == NULL)
+ return -ENOMEM;
+
+ dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, 1, NULL);
+ dmu_tx_hold_bonus(tx, parent);
+ dmu_tx_hold_zap(tx, parent, TRUE, name);
+ LASSERT(tx->tx_objset->os_sa);
+ dmu_tx_hold_sa_create(tx, ZFS_SA_BASE_ATTR_SIZE);
+
+ rc = -dmu_tx_assign(tx, TXG_WAIT);
+ if (rc) {
+ dmu_tx_abort(tx);
+ return rc;
+ }
+
+ la->la_valid = LA_MODE | LA_UID | LA_GID;
+ la->la_mode = S_IFDIR | S_IRUGO | S_IWUSR | S_IXUGO;
+ la->la_uid = la->la_gid = 0;
+ __osd_zap_create(env, &o->od_objset, &db, tx, la, oi_tag, 0);
+
+ zde->zde_dnode = db->db_object;
+ zde->zde_pad = 0;
+ zde->zde_type = IFTODT(S_IFDIR);
+
+ rc = -zap_add(o->od_objset.os, parent, name, 8, 1, (void *)zde, tx);
+
+ dmu_tx_commit(tx);
+
+ *child = db->db_object;
+ sa_buf_rele(db, oi_tag);
+
+ return rc;
+}
+
+static int
+osd_oi_find_or_create(const struct lu_env *env, struct osd_device *o,
+ uint64_t parent, const char *name, uint64_t *child)
+{
+ struct osd_oi oi;
+ int rc;
+
+ rc = osd_oi_lookup(env, o, parent, name, &oi);
+ if (rc == 0)
+ *child = oi.oi_zapid;
+ else if (rc == -ENOENT)
+ rc = osd_oi_create(env, o, parent, name, child);
+
+ return rc;
+}
+
+/**
+ * Lookup the target index/flags of the fid, so it will know where
+ * the object is located (tgt index) and it is MDT or OST object.
+ */
+int osd_fld_lookup(const struct lu_env *env, struct osd_device *osd,
+ const struct lu_fid *fid, struct lu_seq_range *range)
+{
+ struct seq_server_site *ss = osd_seq_site(osd);
+ int rc;
+
+ if (fid_is_idif(fid)) {
+ range->lsr_flags = LU_SEQ_RANGE_OST;
+ range->lsr_index = fid_idif_ost_idx(fid);
+ return 0;
+ }
+
+ if (!fid_is_norm(fid)) {
+ range->lsr_flags = LU_SEQ_RANGE_MDT;
+ if (ss != NULL)
+ range->lsr_index = ss->ss_node_id;
+ return 0;
+ }
+
+ LASSERT(ss != NULL);
+ range->lsr_flags = -1;
+ rc = fld_server_lookup(env, ss->ss_server_fld, fid_seq(fid), range);
+ if (rc != 0) {
+ CERROR("%s can not find "DFID": rc = %d\n",
+ osd2lu_dev(osd)->ld_obd->obd_name, PFID(fid), rc);
+ }
+ return rc;
+}
+
+int fid_is_on_ost(const struct lu_env *env, struct osd_device *osd,
+ const struct lu_fid *fid)
+{
+ struct lu_seq_range *range = &osd_oti_get(env)->oti_seq_range;
+ int rc;
+ ENTRY;
+
+ if (fid_is_idif(fid))
+ RETURN(1);
+
+ rc = osd_fld_lookup(env, osd, fid, range);
+ if (rc != 0) {
+ CERROR("%s: Can not lookup fld for "DFID"\n",
+ osd2lu_dev(osd)->ld_obd->obd_name, PFID(fid));
+ RETURN(rc);
+ }
+
+ CDEBUG(D_INFO, "fid "DFID" range "DRANGE"\n", PFID(fid),
+ PRANGE(range));
+
+ if (range->lsr_flags == LU_SEQ_RANGE_OST)
+ RETURN(1);
+
+ RETURN(0);
+}
+
+static struct osd_seq *osd_seq_find_locked(struct osd_seq_list *seq_list,
+ obd_seq seq)
+{
+ struct osd_seq *osd_seq;
+
+ cfs_list_for_each_entry(osd_seq, &seq_list->osl_seq_list, os_seq_list) {
+ if (osd_seq->os_seq == seq)
+ return osd_seq;
+ }
+ return NULL;
+}
+
+static struct osd_seq *osd_seq_find(struct osd_seq_list *seq_list,
+ obd_seq seq)
+{
+ struct osd_seq *osd_seq;
+
+ read_lock(&seq_list->osl_seq_list_lock);
+ osd_seq = osd_seq_find_locked(seq_list, seq);
+ read_unlock(&seq_list->osl_seq_list_lock);
+
+ return osd_seq;
+}
+
+static struct osd_seq *osd_find_or_add_seq(const struct lu_env *env,
+ struct osd_device *osd, obd_seq seq)
+{
+ struct osd_seq_list *seq_list = &osd->od_seq_list;
+ struct osd_seq *osd_seq;
+ char *key = osd_oti_get(env)->oti_buf;
+ char *seq_name = osd_oti_get(env)->oti_str;
+ struct osd_oi oi;
+ uint64_t sdb, odb;
+ int i;
+ int rc = 0;
+ ENTRY;
+
+ osd_seq = osd_seq_find(seq_list, seq);
+ if (osd_seq != NULL)
+ RETURN(osd_seq);
+
+ down(&seq_list->osl_seq_init_sem);
+ /* Check again, in case some one else already add it
+ * to the list */
+ osd_seq = osd_seq_find(seq_list, seq);
+ if (osd_seq != NULL)
+ GOTO(out, rc = 0);
+
+ OBD_ALLOC_PTR(osd_seq);
+ if (osd_seq == NULL)
+ GOTO(out, rc = -ENOMEM);
+
+ CFS_INIT_LIST_HEAD(&osd_seq->os_seq_list);
+ osd_seq->os_seq = seq;
+
+ /* Init subdir count to be 32, but each seq can have
+ * different subdir count */
+ osd_seq->os_subdir_count = OSD_OST_MAP_SIZE;
+ OBD_ALLOC(osd_seq->os_compat_dirs,
+ sizeof(uint64_t) * osd_seq->os_subdir_count);
+ if (osd_seq->os_compat_dirs == NULL)
+ GOTO(out, rc = -ENOMEM);
+
+ rc = osd_oi_lookup(env, osd, osd->od_root, "O", &oi);
+ if (rc != 0) {
+ CERROR("%s: Can not find O: rc = %d\n", osd_name(osd), rc);
+ GOTO(out, rc);
+ }
+
+ sprintf(seq_name, (fid_seq_is_rsvd(seq) ||
+ fid_seq_is_mdt0(seq)) ? LPU64 : LPX64i,
+ fid_seq_is_idif(seq) ? 0 : seq);
+
+ rc = osd_oi_create(env, osd, oi.oi_zapid, seq_name, &odb);
+ if (rc != 0) {
+ CERROR("%s: Can not create %s : rc = %d\n",
+ osd_name(osd), seq_name, rc);
+ GOTO(out, rc);
+ }
+
+ if (seq == 0)
+ osd->od_ost_compat_grp0 = odb;
+
+ for (i = 0; i < OSD_OST_MAP_SIZE; i++) {
+ sprintf(key, "d%d", i);
+ rc = osd_oi_find_or_create(env, osd, odb, key, &sdb);
+ if (rc)
+ GOTO(out, osd_seq = ERR_PTR(rc));
+ osd_seq->os_compat_dirs[i] = sdb;
+ }
+
+ write_lock(&seq_list->osl_seq_list_lock);
+ cfs_list_add(&osd_seq->os_seq_list, &seq_list->osl_seq_list);
+ write_unlock(&seq_list->osl_seq_list_lock);
+out:
+ up(&seq_list->osl_seq_init_sem);
+ if (rc != 0) {
+ if (osd_seq != NULL && osd_seq->os_compat_dirs != NULL)
+ OBD_FREE(osd_seq->os_compat_dirs,
+ sizeof(uint64_t) * osd_seq->os_subdir_count);
+ if (osd_seq != NULL)
+ OBD_FREE_PTR(osd_seq);
+ osd_seq = ERR_PTR(rc);
+ }
+ RETURN(osd_seq);
+}
+
git://git.whamcloud.com / fs / lustre-release.git / blobdiff