4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/osd/osd_compat.c
38 * on-disk structure for managing /O
40 * Author: Alex Zhuravlev <bzzz@whamcloud.com>
43 /* LUSTRE_VERSION_CODE */
44 #include <lustre_ver.h>
45 /* prerequisite for linux/xattr.h */
46 #include <linux/types.h>
47 /* prerequisite for linux/xattr.h */
49 /* XATTR_{REPLACE,CREATE} */
50 #include <linux/xattr.h>
53 * struct OBD_{ALLOC,FREE}*()
56 #include <obd_support.h>
58 #include "osd_internal.h"
61 static void osd_push_ctxt(const struct osd_device *dev,
62 struct lvfs_run_ctxt *newctxt,
63 struct lvfs_run_ctxt *save)
65 OBD_SET_CTXT_MAGIC(newctxt);
66 newctxt->pwdmnt = dev->od_mnt;
67 newctxt->pwd = dev->od_mnt->mnt_root;
68 newctxt->fs = get_ds();
70 push_ctxt(save, newctxt, NULL);
73 static void osd_pop_ctxt(const struct osd_device *dev,
74 struct lvfs_run_ctxt *new,
75 struct lvfs_run_ctxt *save)
77 pop_ctxt(save, new, NULL);
80 /* utility to make a directory */
81 static struct dentry *simple_mkdir(struct dentry *dir, struct vfsmount *mnt,
82 const char *name, int mode, int fix)
84 struct dentry *dchild;
88 // ASSERT_KERNEL_CTXT("kernel doing mkdir outside kernel context\n");
89 CDEBUG(D_INODE, "creating directory %.*s\n", (int)strlen(name), name);
90 dchild = ll_lookup_one_len(name, dir, strlen(name));
94 if (dchild->d_inode) {
95 int old_mode = dchild->d_inode->i_mode;
96 if (!S_ISDIR(old_mode)) {
97 CERROR("found %s (%lu/%u) is mode %o\n", name,
98 dchild->d_inode->i_ino,
99 dchild->d_inode->i_generation, old_mode);
100 GOTO(out_err, err = -ENOTDIR);
103 /* Fixup directory permissions if necessary */
104 if (fix && (old_mode & S_IALLUGO) != (mode & S_IALLUGO)) {
106 "fixing permissions on %s from %o to %o\n",
107 name, old_mode, mode);
108 dchild->d_inode->i_mode = (mode & S_IALLUGO) |
109 (old_mode & ~S_IALLUGO);
110 mark_inode_dirty(dchild->d_inode);
112 GOTO(out_up, dchild);
115 err = ll_vfs_mkdir(dir->d_inode, dchild, mnt, mode);
123 dchild = ERR_PTR(err);
128 int osd_last_rcvd_subdir_count(struct osd_device *osd)
130 struct lr_server_data lsd;
131 struct dentry *dlast;
134 int count = FILTER_SUBDIR_COUNT;
138 dlast = ll_lookup_one_len(LAST_RCVD, osd_sb(osd)->s_root,
141 return PTR_ERR(dlast);
142 else if (dlast->d_inode == NULL)
146 rc = osd_ldiskfs_read(dlast->d_inode, &lsd, sizeof(lsd), &off);
147 if (rc == sizeof(lsd)) {
148 CDEBUG(D_INFO, "read last_rcvd header, uuid = %s, "
149 "subdir count = %d\n", lsd.lsd_uuid,
150 lsd.lsd_subdir_count);
151 if (le16_to_cpu(lsd.lsd_subdir_count) > 0)
152 count = le16_to_cpu(lsd.lsd_subdir_count);
153 } else if (rc != 0) {
154 CERROR("Can't read last_rcvd file, rc = %d\n", rc);
166 static const char remote_parent_dir[] = "REMOTE_PARENT_DIR";
167 static int osd_mdt_init(const struct lu_env *env, struct osd_device *dev)
169 struct lvfs_run_ctxt new;
170 struct lvfs_run_ctxt save;
171 struct dentry *parent;
172 struct osd_mdobj_map *omm;
174 struct osd_thread_info *info = osd_oti_get(env);
175 struct lu_fid *fid = &info->oti_fid;
179 OBD_ALLOC_PTR(dev->od_mdt_map);
180 if (dev->od_mdt_map == NULL)
183 omm = dev->od_mdt_map;
185 LASSERT(dev->od_fsops);
187 parent = osd_sb(dev)->s_root;
188 osd_push_ctxt(dev, &new, &save);
190 d = simple_mkdir(parent, dev->od_mnt, remote_parent_dir,
193 GOTO(cleanup, rc = PTR_ERR(d));
195 omm->omm_remote_parent = d;
197 /* Set LMA for remote parent inode */
198 lu_local_obj_fid(fid, REMOTE_PARENT_DIR_OID);
199 rc = osd_ea_fid_set(info, d->d_inode, fid, 0);
203 pop_ctxt(&save, &new, NULL);
205 if (omm->omm_remote_parent != NULL)
206 dput(omm->omm_remote_parent);
208 dev->od_mdt_map = NULL;
213 static void osd_mdt_fini(struct osd_device *osd)
215 struct osd_mdobj_map *omm = osd->od_mdt_map;
220 if (omm->omm_remote_parent)
221 dput(omm->omm_remote_parent);
224 osd->od_ost_map = NULL;
227 int osd_add_to_remote_parent(const struct lu_env *env, struct osd_device *osd,
228 struct osd_object *obj, struct osd_thandle *oh)
230 struct osd_mdobj_map *omm = osd->od_mdt_map;
231 struct osd_thread_info *oti = osd_oti_get(env);
232 struct lustre_mdt_attrs *lma = &oti->oti_mdt_attrs;
233 char *name = oti->oti_name;
234 struct dentry *dentry;
235 struct dentry *parent;
238 /* Set REMOTE_PARENT in lma, so other process like unlink or lfsck
239 * can identify this object quickly */
240 rc = osd_get_lma(oti, obj->oo_inode, &oti->oti_obj_dentry, lma);
244 lma->lma_incompat |= LMAI_REMOTE_PARENT;
245 lustre_lma_swab(lma);
246 rc = __osd_xattr_set(oti, obj->oo_inode, XATTR_NAME_LMA, lma,
247 sizeof(*lma), XATTR_REPLACE);
251 parent = omm->omm_remote_parent;
252 sprintf(name, DFID_NOBRACE, PFID(lu_object_fid(&obj->oo_dt.do_lu)));
253 dentry = osd_child_dentry_by_inode(env, parent->d_inode,
255 mutex_lock(&parent->d_inode->i_mutex);
256 rc = osd_ldiskfs_add_entry(oh->ot_handle, dentry, obj->oo_inode,
258 CDEBUG(D_INODE, "%s: add %s:%lu to remote parent %lu.\n", osd_name(osd),
259 name, obj->oo_inode->i_ino, parent->d_inode->i_ino);
260 LASSERTF(parent->d_inode->i_nlink > 1, "%s: %lu nlink %d",
261 osd_name(osd), parent->d_inode->i_ino,
262 parent->d_inode->i_nlink);
263 parent->d_inode->i_nlink++;
264 mark_inode_dirty(parent->d_inode);
265 mutex_unlock(&parent->d_inode->i_mutex);
269 int osd_delete_from_remote_parent(const struct lu_env *env,
270 struct osd_device *osd,
271 struct osd_object *obj,
272 struct osd_thandle *oh)
274 struct osd_mdobj_map *omm = osd->od_mdt_map;
275 struct osd_thread_info *oti = osd_oti_get(env);
276 struct lustre_mdt_attrs *lma = &oti->oti_mdt_attrs;
277 char *name = oti->oti_name;
278 struct dentry *dentry;
279 struct dentry *parent;
280 struct ldiskfs_dir_entry_2 *de;
281 struct buffer_head *bh;
284 /* Check lma to see whether it is remote object */
285 rc = osd_get_lma(oti, obj->oo_inode, &oti->oti_obj_dentry, lma);
289 if (likely(!(lma->lma_incompat & LMAI_REMOTE_PARENT)))
292 parent = omm->omm_remote_parent;
293 sprintf(name, DFID_NOBRACE, PFID(lu_object_fid(&obj->oo_dt.do_lu)));
294 dentry = osd_child_dentry_by_inode(env, parent->d_inode,
296 mutex_lock(&parent->d_inode->i_mutex);
297 bh = osd_ldiskfs_find_entry(parent->d_inode, dentry, &de, NULL);
299 mutex_unlock(&parent->d_inode->i_mutex);
302 CDEBUG(D_INODE, "%s: el %s:%lu to remote parent %lu.\n", osd_name(osd),
303 name, obj->oo_inode->i_ino, parent->d_inode->i_ino);
304 rc = ldiskfs_delete_entry(oh->ot_handle, parent->d_inode, de, bh);
305 LASSERTF(parent->d_inode->i_nlink > 1, "%s: %lu nlink %d",
306 osd_name(osd), parent->d_inode->i_ino,
307 parent->d_inode->i_nlink);
308 parent->d_inode->i_nlink--;
309 mark_inode_dirty(parent->d_inode);
310 mutex_unlock(&parent->d_inode->i_mutex);
313 /* Get rid of REMOTE_PARENT flag from incompat */
314 lma->lma_incompat &= ~LMAI_REMOTE_PARENT;
315 lustre_lma_swab(lma);
316 rc = __osd_xattr_set(oti, obj->oo_inode, XATTR_NAME_LMA, lma,
317 sizeof(*lma), XATTR_REPLACE);
322 * directory structure on legacy OST:
324 * O/<seq>/d0-31/<objid>
331 static int osd_ost_init(struct osd_device *dev)
333 struct lvfs_run_ctxt new;
334 struct lvfs_run_ctxt save;
335 struct dentry *rootd = osd_sb(dev)->s_root;
340 OBD_ALLOC_PTR(dev->od_ost_map);
341 if (dev->od_ost_map == NULL)
344 /* to get subdir count from last_rcvd */
345 rc = osd_last_rcvd_subdir_count(dev);
347 OBD_FREE_PTR(dev->od_ost_map);
351 dev->od_ost_map->om_subdir_count = rc;
354 CFS_INIT_LIST_HEAD(&dev->od_ost_map->om_seq_list);
355 rwlock_init(&dev->od_ost_map->om_seq_list_lock);
356 sema_init(&dev->od_ost_map->om_dir_init_sem, 1);
358 LASSERT(dev->od_fsops);
359 osd_push_ctxt(dev, &new, &save);
361 d = simple_mkdir(rootd, dev->od_mnt, "O", 0755, 1);
363 GOTO(cleanup, rc = PTR_ERR(d));
365 ldiskfs_set_inode_state(d->d_inode, LDISKFS_STATE_LUSTRE_NO_OI);
366 dev->od_ost_map->om_root = d;
369 osd_pop_ctxt(dev, &new, &save);
371 OBD_FREE_PTR(dev->od_ost_map);
378 static void osd_seq_free(struct osd_obj_map *map,
379 struct osd_obj_seq *osd_seq)
383 cfs_list_del_init(&osd_seq->oos_seq_list);
385 if (osd_seq->oos_dirs) {
386 for (j = 0; j < osd_seq->oos_subdir_count; j++) {
387 if (osd_seq->oos_dirs[j])
388 dput(osd_seq->oos_dirs[j]);
390 OBD_FREE(osd_seq->oos_dirs,
391 sizeof(struct dentry *) * osd_seq->oos_subdir_count);
394 if (osd_seq->oos_root)
395 dput(osd_seq->oos_root);
397 OBD_FREE_PTR(osd_seq);
400 static void osd_ost_fini(struct osd_device *osd)
402 struct osd_obj_seq *osd_seq;
403 struct osd_obj_seq *tmp;
404 struct osd_obj_map *map = osd->od_ost_map;
410 write_lock(&map->om_seq_list_lock);
411 cfs_list_for_each_entry_safe(osd_seq, tmp,
414 osd_seq_free(map, osd_seq);
416 write_unlock(&map->om_seq_list_lock);
420 osd->od_ost_map = NULL;
424 int osd_obj_map_init(const struct lu_env *env, struct osd_device *dev)
429 /* prepare structures for OST */
430 rc = osd_ost_init(dev);
434 /* prepare structures for MDS */
435 rc = osd_mdt_init(env, dev);
440 struct osd_obj_seq *osd_seq_find_locked(struct osd_obj_map *map, obd_seq seq)
442 struct osd_obj_seq *osd_seq;
444 cfs_list_for_each_entry(osd_seq, &map->om_seq_list, oos_seq_list) {
445 if (osd_seq->oos_seq == seq)
451 struct osd_obj_seq *osd_seq_find(struct osd_obj_map *map, obd_seq seq)
453 struct osd_obj_seq *osd_seq;
455 read_lock(&map->om_seq_list_lock);
456 osd_seq = osd_seq_find_locked(map, seq);
457 read_unlock(&map->om_seq_list_lock);
461 void osd_obj_map_fini(struct osd_device *dev)
467 static int osd_obj_del_entry(struct osd_thread_info *info,
468 struct osd_device *osd,
469 struct dentry *dird, char *name,
472 struct ldiskfs_dir_entry_2 *de;
473 struct buffer_head *bh;
474 struct osd_thandle *oh;
475 struct dentry *child;
476 struct inode *dir = dird->d_inode;
480 oh = container_of(th, struct osd_thandle, ot_super);
481 LASSERT(oh->ot_handle != NULL);
482 LASSERT(oh->ot_handle->h_transaction != NULL);
485 child = &info->oti_child_dentry;
486 child->d_name.hash = 0;
487 child->d_name.name = name;
488 child->d_name.len = strlen(name);
489 child->d_parent = dird;
490 child->d_inode = NULL;
493 mutex_lock(&dir->i_mutex);
495 bh = osd_ldiskfs_find_entry(dir, child, &de, NULL);
497 rc = ldiskfs_delete_entry(oh->ot_handle, dir, de, bh);
500 mutex_unlock(&dir->i_mutex);
505 int osd_obj_add_entry(struct osd_thread_info *info,
506 struct osd_device *osd,
507 struct dentry *dir, char *name,
508 const struct osd_inode_id *id,
511 struct osd_thandle *oh;
512 struct dentry *child;
518 oh = container_of(th, struct osd_thandle, ot_super);
519 LASSERT(oh->ot_handle != NULL);
520 LASSERT(oh->ot_handle->h_transaction != NULL);
522 inode = &info->oti_inode;
523 inode->i_sb = osd_sb(osd);
524 osd_id_to_inode(inode, id);
525 inode->i_mode = S_IFREG; /* for type in ldiskfs dir entry */
527 child = &info->oti_child_dentry;
528 child->d_name.hash = 0;
529 child->d_name.name = name;
530 child->d_name.len = strlen(name);
531 child->d_parent = dir;
532 child->d_inode = inode;
534 ll_vfs_dq_init(dir->d_inode);
535 mutex_lock(&dir->d_inode->i_mutex);
536 rc = osd_ldiskfs_add_entry(oh->ot_handle, child, inode, NULL);
537 mutex_unlock(&dir->d_inode->i_mutex);
543 * Use LPU64 for legacy OST sequences, but use LPX64i for new
544 * sequences names, so that the O/{seq}/dN/{oid} more closely
545 * follows the DFID/PFID format. This makes it easier to map from
546 * debug messages to objects in the future, and the legacy space
547 * of FID_SEQ_OST_MDT0 will be unused in the future.
549 static inline void osd_seq_name(char *seq_name, obd_seq seq)
551 sprintf(seq_name, (fid_seq_is_rsvd(seq) ||
552 fid_seq_is_mdt0(seq)) ? LPU64 : LPX64i,
553 fid_seq_is_idif(seq) ? 0 : seq);
556 static inline void osd_oid_name(char *name, const struct lu_fid *fid, obd_id id)
558 sprintf(name, (fid_seq_is_rsvd(fid_seq(fid)) ||
559 fid_seq_is_mdt0(fid_seq(fid)) ||
560 fid_seq_is_idif(fid_seq(fid))) ? LPU64 : LPX64i, id);
563 /* external locking is required */
564 static int osd_seq_load_locked(struct osd_device *osd,
565 struct osd_obj_seq *osd_seq)
567 struct osd_obj_map *map = osd->od_ost_map;
568 struct dentry *seq_dir;
574 if (osd_seq->oos_root != NULL)
578 LASSERT(map->om_root);
580 osd_seq_name(seq_name, osd_seq->oos_seq);
582 seq_dir = simple_mkdir(map->om_root, osd->od_mnt, seq_name, 0755, 1);
584 GOTO(out_err, rc = PTR_ERR(seq_dir));
585 else if (seq_dir->d_inode == NULL)
586 GOTO(out_put, rc = -EFAULT);
588 ldiskfs_set_inode_state(seq_dir->d_inode, LDISKFS_STATE_LUSTRE_NO_OI);
589 osd_seq->oos_root = seq_dir;
591 LASSERT(osd_seq->oos_dirs == NULL);
592 OBD_ALLOC(osd_seq->oos_dirs,
593 sizeof(seq_dir) * osd_seq->oos_subdir_count);
594 if (osd_seq->oos_dirs == NULL)
595 GOTO(out_put, rc = -ENOMEM);
597 for (i = 0; i < osd_seq->oos_subdir_count; i++) {
601 sprintf(name, "d%u", i);
602 dir = simple_mkdir(osd_seq->oos_root, osd->od_mnt, name,
606 } else if (dir->d_inode) {
607 ldiskfs_set_inode_state(dir->d_inode,
608 LDISKFS_STATE_LUSTRE_NO_OI);
609 osd_seq->oos_dirs[i] = dir;
617 osd_seq_free(map, osd_seq);
621 osd_seq->oos_root = NULL;
627 struct osd_obj_seq *osd_seq_load(struct osd_device *osd, obd_seq seq)
629 struct osd_obj_map *map;
630 struct osd_obj_seq *osd_seq;
634 map = osd->od_ost_map;
636 LASSERT(map->om_root);
638 osd_seq = osd_seq_find(map, seq);
639 if (likely(osd_seq != NULL))
642 /* Serializing init process */
643 down(&map->om_dir_init_sem);
645 /* Check whether the seq has been added */
646 read_lock(&map->om_seq_list_lock);
647 osd_seq = osd_seq_find_locked(map, seq);
648 if (osd_seq != NULL) {
649 read_unlock(&map->om_seq_list_lock);
650 GOTO(cleanup, rc = 0);
652 read_unlock(&map->om_seq_list_lock);
654 OBD_ALLOC_PTR(osd_seq);
656 GOTO(cleanup, rc = -ENOMEM);
658 CFS_INIT_LIST_HEAD(&osd_seq->oos_seq_list);
659 osd_seq->oos_seq = seq;
660 /* Init subdir count to be 32, but each seq can have
661 * different subdir count */
662 osd_seq->oos_subdir_count = map->om_subdir_count;
663 rc = osd_seq_load_locked(osd, osd_seq);
667 write_lock(&map->om_seq_list_lock);
668 cfs_list_add(&osd_seq->oos_seq_list, &map->om_seq_list);
669 write_unlock(&map->om_seq_list_lock);
672 up(&map->om_dir_init_sem);
675 OBD_FREE_PTR(osd_seq);
682 int osd_obj_map_lookup(struct osd_thread_info *info, struct osd_device *dev,
683 const struct lu_fid *fid, struct osd_inode_id *id)
685 struct osd_obj_map *map;
686 struct osd_obj_seq *osd_seq;
687 struct dentry *d_seq;
688 struct dentry *child;
689 struct ost_id *ostid = &info->oti_ostid;
692 struct ldiskfs_dir_entry_2 *de;
693 struct buffer_head *bh;
698 /* on the very first lookup we find and open directories */
700 map = dev->od_ost_map;
702 LASSERT(map->om_root);
704 fid_to_ostid(fid, ostid);
705 osd_seq = osd_seq_load(dev, ostid_seq(ostid));
707 RETURN(PTR_ERR(osd_seq));
709 dirn = ostid_id(ostid) & (osd_seq->oos_subdir_count - 1);
710 d_seq = osd_seq->oos_dirs[dirn];
713 osd_oid_name(name, fid, ostid_id(ostid));
715 child = &info->oti_child_dentry;
716 child->d_parent = d_seq;
717 child->d_name.hash = 0;
718 child->d_name.name = name;
719 /* XXX: we can use rc from sprintf() instead of strlen() */
720 child->d_name.len = strlen(name);
722 dir = d_seq->d_inode;
723 mutex_lock(&dir->i_mutex);
724 bh = osd_ldiskfs_find_entry(dir, child, &de, NULL);
725 mutex_unlock(&dir->i_mutex);
730 osd_id_gen(id, le32_to_cpu(de->inode), OSD_OII_NOGEN);
733 inode = osd_iget(info, dev, id);
735 RETURN(PTR_ERR(inode));
741 int osd_obj_map_insert(struct osd_thread_info *info,
742 struct osd_device *osd,
743 const struct lu_fid *fid,
744 const struct osd_inode_id *id,
747 struct osd_obj_map *map;
748 struct osd_obj_seq *osd_seq;
750 struct ost_id *ostid = &info->oti_ostid;
755 map = osd->od_ost_map;
758 /* map fid to seq:objid */
759 fid_to_ostid(fid, ostid);
761 osd_seq = osd_seq_load(osd, ostid_seq(ostid));
763 RETURN(PTR_ERR(osd_seq));
765 dirn = ostid_id(ostid) & (osd_seq->oos_subdir_count - 1);
766 d = osd_seq->oos_dirs[dirn];
769 osd_oid_name(name, fid, ostid_id(ostid));
770 rc = osd_obj_add_entry(info, osd, d, name, id, th);
775 int osd_obj_map_delete(struct osd_thread_info *info, struct osd_device *osd,
776 const struct lu_fid *fid, struct thandle *th)
778 struct osd_obj_map *map;
779 struct osd_obj_seq *osd_seq;
781 struct ost_id *ostid = &info->oti_ostid;
786 map = osd->od_ost_map;
789 /* map fid to seq:objid */
790 fid_to_ostid(fid, ostid);
792 osd_seq = osd_seq_load(osd, ostid_seq(ostid));
794 GOTO(cleanup, rc = PTR_ERR(osd_seq));
796 dirn = ostid_id(ostid) & (osd_seq->oos_subdir_count - 1);
797 d = osd_seq->oos_dirs[dirn];
800 osd_oid_name(name, fid, ostid_id(ostid));
801 rc = osd_obj_del_entry(info, osd, d, name, th);
806 int osd_obj_spec_insert(struct osd_thread_info *info, struct osd_device *osd,
807 const struct lu_fid *fid,
808 const struct osd_inode_id *id,
811 struct osd_obj_map *map = osd->od_ost_map;
812 struct dentry *root = osd_sb(osd)->s_root;
817 if (fid_is_last_id(fid)) {
818 struct osd_obj_seq *osd_seq;
820 /* on creation of LAST_ID we create O/<seq> hierarchy */
822 osd_seq = osd_seq_load(osd, fid_seq(fid));
824 RETURN(PTR_ERR(osd_seq));
825 rc = osd_obj_add_entry(info, osd, osd_seq->oos_root,
828 name = osd_lf_fid2name(fid);
830 CWARN("UNKNOWN COMPAT FID "DFID"\n", PFID(fid));
832 rc = osd_obj_add_entry(info, osd, root, name, id, th);
838 int osd_obj_spec_lookup(struct osd_thread_info *info, struct osd_device *osd,
839 const struct lu_fid *fid, struct osd_inode_id *id)
842 struct dentry *dentry;
848 if (fid_is_last_id(fid)) {
849 struct osd_obj_seq *osd_seq;
851 osd_seq = osd_seq_load(osd, fid_seq(fid));
853 RETURN(PTR_ERR(osd_seq));
854 root = osd_seq->oos_root;
857 root = osd_sb(osd)->s_root;
858 name = osd_lf_fid2name(fid);
859 if (name == NULL || strlen(name) == 0)
863 dentry = ll_lookup_one_len(name, root, strlen(name));
864 if (!IS_ERR(dentry)) {
865 inode = dentry->d_inode;
867 if (is_bad_inode(inode)) {
870 osd_id_gen(id, inode->i_ino,
871 inode->i_generation);
875 /* if dentry is accessible after osd_compat_spec_insert it
876 * will still contain NULL inode, so don't keep it in cache */
877 d_invalidate(dentry);