+ sprintf(seq_name, (fid_seq_is_rsvd(seq) ||
+ fid_seq_is_mdt0(seq)) ? LPU64 : LPX64i,
+ fid_seq_is_idif(seq) ? 0 : seq);
+}
+
+static inline void osd_oid_name(char *name, const struct lu_fid *fid, obd_id id)
+{
+ sprintf(name, (fid_seq_is_rsvd(fid_seq(fid)) ||
+ fid_seq_is_mdt0(fid_seq(fid)) ||
+ fid_seq_is_idif(fid_seq(fid))) ? LPU64 : LPX64i, id);
+}
+
+/* external locking is required */
+static int osd_seq_load_locked(struct osd_device *osd,
+ struct osd_obj_seq *osd_seq)
+{
+ struct osd_obj_map *map = osd->od_ost_map;
+ struct dentry *seq_dir;
+ int rc = 0;
+ int i;
+ char seq_name[32];
+ ENTRY;
+
+ if (osd_seq->oos_root != NULL)
+ RETURN(0);
+
+ LASSERT(map);
+ LASSERT(map->om_root);
+
+ osd_seq_name(seq_name, osd_seq->oos_seq);
+
+ seq_dir = simple_mkdir(map->om_root, osd->od_mnt, seq_name, 0755, 1);
+ if (IS_ERR(seq_dir))
+ GOTO(out_err, rc = PTR_ERR(seq_dir));
+ else if (seq_dir->d_inode == NULL)
+ GOTO(out_put, rc = -EFAULT);
+
+ osd_seq->oos_root = seq_dir;
+
+ LASSERT(osd_seq->oos_dirs == NULL);
+ OBD_ALLOC(osd_seq->oos_dirs,
+ sizeof(seq_dir) * osd_seq->oos_subdir_count);
+ if (osd_seq->oos_dirs == NULL)
+ GOTO(out_put, rc = -ENOMEM);
+
+ for (i = 0; i < osd_seq->oos_subdir_count; i++) {
+ struct dentry *dir;
+ char name[32];
+
+ sprintf(name, "d%u", i);
+ dir = simple_mkdir(osd_seq->oos_root, osd->od_mnt, name,
+ 0700, 1);
+ if (IS_ERR(dir)) {
+ rc = PTR_ERR(dir);
+ } else if (dir->d_inode) {
+ osd_seq->oos_dirs[i] = dir;
+ rc = 0;
+ } else {
+ LBUG();
+ }
+ }
+
+ if (rc != 0)
+ osd_seq_free(map, osd_seq);
+out_put:
+ if (rc != 0) {
+ dput(seq_dir);
+ osd_seq->oos_root = NULL;
+ }
+out_err:
+ RETURN(rc);
+}
+
+static struct osd_obj_seq *osd_seq_load(struct osd_device *osd, obd_seq seq)
+{
+ struct osd_obj_map *map;
+ struct osd_obj_seq *osd_seq;
+ int rc = 0;
+ ENTRY;
+
+ map = osd->od_ost_map;
+ LASSERT(map);
+ LASSERT(map->om_root);
+
+ osd_seq = osd_seq_find(map, seq);
+ if (likely(osd_seq != NULL))
+ RETURN(osd_seq);
+
+ /* Serializing init process */
+ down(&map->om_dir_init_sem);
+
+ /* Check whether the seq has been added */
+ read_lock(&map->om_seq_list_lock);
+ osd_seq = osd_seq_find_locked(map, seq);
+ if (osd_seq != NULL) {
+ read_unlock(&map->om_seq_list_lock);
+ GOTO(cleanup, rc = 0);
+ }
+ read_unlock(&map->om_seq_list_lock);
+
+ OBD_ALLOC_PTR(osd_seq);
+ if (osd_seq == NULL)
+ GOTO(cleanup, rc = -ENOMEM);
+
+ CFS_INIT_LIST_HEAD(&osd_seq->oos_seq_list);
+ osd_seq->oos_seq = seq;
+ /* Init subdir count to be 32, but each seq can have
+ * different subdir count */
+ osd_seq->oos_subdir_count = map->om_subdir_count;
+ rc = osd_seq_load_locked(osd, osd_seq);
+ if (rc != 0)
+ GOTO(cleanup, rc);
+
+ write_lock(&map->om_seq_list_lock);
+ cfs_list_add(&osd_seq->oos_seq_list, &map->om_seq_list);
+ write_unlock(&map->om_seq_list_lock);
+
+cleanup:
+ up(&map->om_dir_init_sem);
+ if (rc != 0) {
+ if (osd_seq != NULL)
+ OBD_FREE_PTR(osd_seq);
+ RETURN(ERR_PTR(rc));
+ }
+
+ RETURN(osd_seq);
+}
+
+int osd_obj_map_lookup(struct osd_thread_info *info, struct osd_device *dev,
+ const struct lu_fid *fid, struct osd_inode_id *id)
+{
+ struct osd_obj_map *map;
+ struct osd_obj_seq *osd_seq;
+ struct dentry *d_seq;
+ struct dentry *child;
+ struct ost_id *ostid = &info->oti_ostid;
+ int dirn;
+ char name[32];
+ struct ldiskfs_dir_entry_2 *de;
+ struct buffer_head *bh;
+ struct inode *dir;
+ struct inode *inode;