ocfs2: Add a name indexed b-tree to directory inodes
[linux-2.6.git] / fs / ocfs2 / namei.c
1 /* -*- mode: c; c-basic-offset: 8; -*-
2  * vim: noexpandtab sw=8 ts=8 sts=0:
3  *
4  * namei.c
5  *
6  * Create and rename file, directory, symlinks
7  *
8  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
9  *
10  *  Portions of this code from linux/fs/ext3/dir.c
11  *
12  *  Copyright (C) 1992, 1993, 1994, 1995
13  *  Remy Card (card@masi.ibp.fr)
14  *  Laboratoire MASI - Institut Blaise pascal
15  *  Universite Pierre et Marie Curie (Paris VI)
16  *
17  *   from
18  *
19  *   linux/fs/minix/dir.c
20  *
21  *   Copyright (C) 1991, 1992 Linux Torvalds
22  *
23  * This program is free software; you can redistribute it and/or
24  * modify it under the terms of the GNU General Public
25  * License as published by the Free Software Foundation; either
26  * version 2 of the License, or (at your option) any later version.
27  *
28  * This program is distributed in the hope that it will be useful,
29  * but WITHOUT ANY WARRANTY; without even the implied warranty of
30  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
31  * General Public License for more details.
32  *
33  * You should have received a copy of the GNU General Public
34  * License along with this program; if not, write to the
35  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
36  * Boston, MA 021110-1307, USA.
37  */
38
39 #include <linux/fs.h>
40 #include <linux/types.h>
41 #include <linux/slab.h>
42 #include <linux/highmem.h>
43 #include <linux/quotaops.h>
44
45 #define MLOG_MASK_PREFIX ML_NAMEI
46 #include <cluster/masklog.h>
47
48 #include "ocfs2.h"
49
50 #include "alloc.h"
51 #include "dcache.h"
52 #include "dir.h"
53 #include "dlmglue.h"
54 #include "extent_map.h"
55 #include "file.h"
56 #include "inode.h"
57 #include "journal.h"
58 #include "namei.h"
59 #include "suballoc.h"
60 #include "super.h"
61 #include "symlink.h"
62 #include "sysfile.h"
63 #include "uptodate.h"
64 #include "xattr.h"
65 #include "acl.h"
66
67 #include "buffer_head_io.h"
68
69 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
70                               struct inode *dir,
71                               struct inode *inode,
72                               struct dentry *dentry,
73                               dev_t dev,
74                               struct buffer_head **new_fe_bh,
75                               struct buffer_head *parent_fe_bh,
76                               handle_t *handle,
77                               struct ocfs2_alloc_context *inode_ac);
78
79 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
80                                     struct inode **ret_orphan_dir,
81                                     struct inode *inode,
82                                     char *name,
83                                     struct ocfs2_dir_lookup_result *lookup);
84
85 static int ocfs2_orphan_add(struct ocfs2_super *osb,
86                             handle_t *handle,
87                             struct inode *inode,
88                             struct ocfs2_dinode *fe,
89                             char *name,
90                             struct ocfs2_dir_lookup_result *lookup,
91                             struct inode *orphan_dir_inode);
92
93 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
94                                      handle_t *handle,
95                                      struct inode *inode,
96                                      const char *symname);
97
98 /* An orphan dir name is an 8 byte value, printed as a hex string */
99 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
100
101 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
102                                    struct nameidata *nd)
103 {
104         int status;
105         u64 blkno;
106         struct inode *inode = NULL;
107         struct dentry *ret;
108         struct ocfs2_inode_info *oi;
109
110         mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
111                    dentry->d_name.len, dentry->d_name.name);
112
113         if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
114                 ret = ERR_PTR(-ENAMETOOLONG);
115                 goto bail;
116         }
117
118         mlog(0, "find name %.*s in directory %llu\n", dentry->d_name.len,
119              dentry->d_name.name, (unsigned long long)OCFS2_I(dir)->ip_blkno);
120
121         status = ocfs2_inode_lock(dir, NULL, 0);
122         if (status < 0) {
123                 if (status != -ENOENT)
124                         mlog_errno(status);
125                 ret = ERR_PTR(status);
126                 goto bail;
127         }
128
129         status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
130                                             dentry->d_name.len, &blkno);
131         if (status < 0)
132                 goto bail_add;
133
134         inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
135         if (IS_ERR(inode)) {
136                 ret = ERR_PTR(-EACCES);
137                 goto bail_unlock;
138         }
139
140         oi = OCFS2_I(inode);
141         /* Clear any orphaned state... If we were able to look up the
142          * inode from a directory, it certainly can't be orphaned. We
143          * might have the bad state from a node which intended to
144          * orphan this inode but crashed before it could commit the
145          * unlink. */
146         spin_lock(&oi->ip_lock);
147         oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
148         spin_unlock(&oi->ip_lock);
149
150 bail_add:
151         dentry->d_op = &ocfs2_dentry_ops;
152         ret = d_splice_alias(inode, dentry);
153
154         if (inode) {
155                 /*
156                  * If d_splice_alias() finds a DCACHE_DISCONNECTED
157                  * dentry, it will d_move() it on top of ourse. The
158                  * return value will indicate this however, so in
159                  * those cases, we switch them around for the locking
160                  * code.
161                  *
162                  * NOTE: This dentry already has ->d_op set from
163                  * ocfs2_get_parent() and ocfs2_get_dentry()
164                  */
165                 if (ret)
166                         dentry = ret;
167
168                 status = ocfs2_dentry_attach_lock(dentry, inode,
169                                                   OCFS2_I(dir)->ip_blkno);
170                 if (status) {
171                         mlog_errno(status);
172                         ret = ERR_PTR(status);
173                         goto bail_unlock;
174                 }
175         }
176
177 bail_unlock:
178         /* Don't drop the cluster lock until *after* the d_add --
179          * unlink on another node will message us to remove that
180          * dentry under this lock so otherwise we can race this with
181          * the downconvert thread and have a stale dentry. */
182         ocfs2_inode_unlock(dir, 0);
183
184 bail:
185
186         mlog_exit_ptr(ret);
187
188         return ret;
189 }
190
191 static struct inode *ocfs2_get_init_inode(struct inode *dir, int mode)
192 {
193         struct inode *inode;
194
195         inode = new_inode(dir->i_sb);
196         if (!inode) {
197                 mlog(ML_ERROR, "new_inode failed!\n");
198                 return NULL;
199         }
200
201         /* populate as many fields early on as possible - many of
202          * these are used by the support functions here and in
203          * callers. */
204         if (S_ISDIR(mode))
205                 inode->i_nlink = 2;
206         else
207                 inode->i_nlink = 1;
208         inode->i_uid = current_fsuid();
209         if (dir->i_mode & S_ISGID) {
210                 inode->i_gid = dir->i_gid;
211                 if (S_ISDIR(mode))
212                         mode |= S_ISGID;
213         } else
214                 inode->i_gid = current_fsgid();
215         inode->i_mode = mode;
216         vfs_dq_init(inode);
217         return inode;
218 }
219
220 static int ocfs2_mknod(struct inode *dir,
221                        struct dentry *dentry,
222                        int mode,
223                        dev_t dev)
224 {
225         int status = 0;
226         struct buffer_head *parent_fe_bh = NULL;
227         handle_t *handle = NULL;
228         struct ocfs2_super *osb;
229         struct ocfs2_dinode *dirfe;
230         struct buffer_head *new_fe_bh = NULL;
231         struct inode *inode = NULL;
232         struct ocfs2_alloc_context *inode_ac = NULL;
233         struct ocfs2_alloc_context *data_ac = NULL;
234         struct ocfs2_alloc_context *meta_ac = NULL;
235         int want_clusters = 0;
236         int want_meta = 0;
237         int xattr_credits = 0;
238         struct ocfs2_security_xattr_info si = {
239                 .enable = 1,
240         };
241         int did_quota_inode = 0;
242         struct ocfs2_dir_lookup_result lookup = { NULL, };
243
244         mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode,
245                    (unsigned long)dev, dentry->d_name.len,
246                    dentry->d_name.name);
247
248         /* get our super block */
249         osb = OCFS2_SB(dir->i_sb);
250
251         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
252         if (status < 0) {
253                 if (status != -ENOENT)
254                         mlog_errno(status);
255                 return status;
256         }
257
258         if (S_ISDIR(mode) && (dir->i_nlink >= OCFS2_LINK_MAX)) {
259                 status = -EMLINK;
260                 goto leave;
261         }
262
263         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
264         if (!dirfe->i_links_count) {
265                 /* can't make a file in a deleted directory. */
266                 status = -ENOENT;
267                 goto leave;
268         }
269
270         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
271                                            dentry->d_name.len);
272         if (status)
273                 goto leave;
274
275         /* get a spot inside the dir. */
276         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
277                                               dentry->d_name.name,
278                                               dentry->d_name.len, &lookup);
279         if (status < 0) {
280                 mlog_errno(status);
281                 goto leave;
282         }
283
284         /* reserve an inode spot */
285         status = ocfs2_reserve_new_inode(osb, &inode_ac);
286         if (status < 0) {
287                 if (status != -ENOSPC)
288                         mlog_errno(status);
289                 goto leave;
290         }
291
292         inode = ocfs2_get_init_inode(dir, mode);
293         if (!inode) {
294                 status = -ENOMEM;
295                 mlog_errno(status);
296                 goto leave;
297         }
298
299         /* get security xattr */
300         status = ocfs2_init_security_get(inode, dir, &si);
301         if (status) {
302                 if (status == -EOPNOTSUPP)
303                         si.enable = 0;
304                 else {
305                         mlog_errno(status);
306                         goto leave;
307                 }
308         }
309
310         /* calculate meta data/clusters for setting security and acl xattr */
311         status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
312                                        &si, &want_clusters,
313                                        &xattr_credits, &want_meta);
314         if (status < 0) {
315                 mlog_errno(status);
316                 goto leave;
317         }
318
319         /* Reserve a cluster if creating an extent based directory. */
320         if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
321                 want_clusters += 1;
322
323                 /* Dir indexing requires extra space as well */
324                 if (ocfs2_supports_indexed_dirs(osb)) {
325                         want_clusters++;
326                         want_meta++;
327                 }
328         }
329
330         status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
331         if (status < 0) {
332                 if (status != -ENOSPC)
333                         mlog_errno(status);
334                 goto leave;
335         }
336
337         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
338         if (status < 0) {
339                 if (status != -ENOSPC)
340                         mlog_errno(status);
341                 goto leave;
342         }
343
344         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
345                                                             S_ISDIR(mode),
346                                                             xattr_credits));
347         if (IS_ERR(handle)) {
348                 status = PTR_ERR(handle);
349                 handle = NULL;
350                 mlog_errno(status);
351                 goto leave;
352         }
353
354         /* We don't use standard VFS wrapper because we don't want vfs_dq_init
355          * to be called. */
356         if (sb_any_quota_active(osb->sb) &&
357             osb->sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA) {
358                 status = -EDQUOT;
359                 goto leave;
360         }
361         did_quota_inode = 1;
362
363         /* do the real work now. */
364         status = ocfs2_mknod_locked(osb, dir, inode, dentry, dev,
365                                     &new_fe_bh, parent_fe_bh, handle,
366                                     inode_ac);
367         if (status < 0) {
368                 mlog_errno(status);
369                 goto leave;
370         }
371
372         if (S_ISDIR(mode)) {
373                 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
374                                             new_fe_bh, data_ac, meta_ac);
375                 if (status < 0) {
376                         mlog_errno(status);
377                         goto leave;
378                 }
379
380                 status = ocfs2_journal_access_di(handle, dir, parent_fe_bh,
381                                                  OCFS2_JOURNAL_ACCESS_WRITE);
382                 if (status < 0) {
383                         mlog_errno(status);
384                         goto leave;
385                 }
386                 le16_add_cpu(&dirfe->i_links_count, 1);
387                 status = ocfs2_journal_dirty(handle, parent_fe_bh);
388                 if (status < 0) {
389                         mlog_errno(status);
390                         goto leave;
391                 }
392                 inc_nlink(dir);
393         }
394
395         status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
396                                 meta_ac, data_ac);
397         if (status < 0) {
398                 mlog_errno(status);
399                 goto leave;
400         }
401
402         if (si.enable) {
403                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
404                                                  meta_ac, data_ac);
405                 if (status < 0) {
406                         mlog_errno(status);
407                         goto leave;
408                 }
409         }
410
411         status = ocfs2_add_entry(handle, dentry, inode,
412                                  OCFS2_I(inode)->ip_blkno, parent_fe_bh,
413                                  &lookup);
414         if (status < 0) {
415                 mlog_errno(status);
416                 goto leave;
417         }
418
419         status = ocfs2_dentry_attach_lock(dentry, inode,
420                                           OCFS2_I(dir)->ip_blkno);
421         if (status) {
422                 mlog_errno(status);
423                 goto leave;
424         }
425
426         insert_inode_hash(inode);
427         dentry->d_op = &ocfs2_dentry_ops;
428         d_instantiate(dentry, inode);
429         status = 0;
430 leave:
431         if (status < 0 && did_quota_inode)
432                 vfs_dq_free_inode(inode);
433         if (handle)
434                 ocfs2_commit_trans(osb, handle);
435
436         ocfs2_inode_unlock(dir, 1);
437
438         if (status == -ENOSPC)
439                 mlog(0, "Disk is full\n");
440
441         brelse(new_fe_bh);
442         brelse(parent_fe_bh);
443         kfree(si.name);
444         kfree(si.value);
445
446         ocfs2_free_dir_lookup_result(&lookup);
447
448         if ((status < 0) && inode) {
449                 clear_nlink(inode);
450                 iput(inode);
451         }
452
453         if (inode_ac)
454                 ocfs2_free_alloc_context(inode_ac);
455
456         if (data_ac)
457                 ocfs2_free_alloc_context(data_ac);
458
459         if (meta_ac)
460                 ocfs2_free_alloc_context(meta_ac);
461
462         mlog_exit(status);
463
464         return status;
465 }
466
467 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
468                               struct inode *dir,
469                               struct inode *inode,
470                               struct dentry *dentry,
471                               dev_t dev,
472                               struct buffer_head **new_fe_bh,
473                               struct buffer_head *parent_fe_bh,
474                               handle_t *handle,
475                               struct ocfs2_alloc_context *inode_ac)
476 {
477         int status = 0;
478         struct ocfs2_dinode *fe = NULL;
479         struct ocfs2_extent_list *fel;
480         u64 fe_blkno = 0;
481         u16 suballoc_bit;
482         u16 feat;
483
484         mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry,
485                    inode->i_mode, (unsigned long)dev, dentry->d_name.len,
486                    dentry->d_name.name);
487
488         *new_fe_bh = NULL;
489
490         status = ocfs2_claim_new_inode(osb, handle, inode_ac, &suballoc_bit,
491                                        &fe_blkno);
492         if (status < 0) {
493                 mlog_errno(status);
494                 goto leave;
495         }
496
497         /* populate as many fields early on as possible - many of
498          * these are used by the support functions here and in
499          * callers. */
500         inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
501         OCFS2_I(inode)->ip_blkno = fe_blkno;
502         spin_lock(&osb->osb_lock);
503         inode->i_generation = osb->s_next_generation++;
504         spin_unlock(&osb->osb_lock);
505
506         *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
507         if (!*new_fe_bh) {
508                 status = -EIO;
509                 mlog_errno(status);
510                 goto leave;
511         }
512         ocfs2_set_new_buffer_uptodate(inode, *new_fe_bh);
513
514         status = ocfs2_journal_access_di(handle, inode, *new_fe_bh,
515                                          OCFS2_JOURNAL_ACCESS_CREATE);
516         if (status < 0) {
517                 mlog_errno(status);
518                 goto leave;
519         }
520
521         fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
522         memset(fe, 0, osb->sb->s_blocksize);
523
524         fe->i_generation = cpu_to_le32(inode->i_generation);
525         fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
526         fe->i_blkno = cpu_to_le64(fe_blkno);
527         fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
528         fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
529         fe->i_uid = cpu_to_le32(inode->i_uid);
530         fe->i_gid = cpu_to_le32(inode->i_gid);
531         fe->i_mode = cpu_to_le16(inode->i_mode);
532         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
533                 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
534         fe->i_links_count = cpu_to_le16(inode->i_nlink);
535
536         fe->i_last_eb_blk = 0;
537         strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
538         le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL);
539         fe->i_atime = fe->i_ctime = fe->i_mtime =
540                 cpu_to_le64(CURRENT_TIME.tv_sec);
541         fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
542                 cpu_to_le32(CURRENT_TIME.tv_nsec);
543         fe->i_dtime = 0;
544
545         /*
546          * If supported, directories start with inline data. If inline
547          * isn't supported, but indexing is, we start them as indexed.
548          */
549         feat = le16_to_cpu(fe->i_dyn_features);
550         if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
551                 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
552
553                 fe->id2.i_data.id_count = cpu_to_le16(
554                                 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
555         } else {
556                 fel = &fe->id2.i_list;
557                 fel->l_tree_depth = 0;
558                 fel->l_next_free_rec = 0;
559                 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
560         }
561
562         status = ocfs2_journal_dirty(handle, *new_fe_bh);
563         if (status < 0) {
564                 mlog_errno(status);
565                 goto leave;
566         }
567
568         ocfs2_populate_inode(inode, fe, 1);
569         ocfs2_inode_set_new(osb, inode);
570         if (!ocfs2_mount_local(osb)) {
571                 status = ocfs2_create_new_inode_locks(inode);
572                 if (status < 0)
573                         mlog_errno(status);
574         }
575
576         status = 0; /* error in ocfs2_create_new_inode_locks is not
577                      * critical */
578
579 leave:
580         if (status < 0) {
581                 if (*new_fe_bh) {
582                         brelse(*new_fe_bh);
583                         *new_fe_bh = NULL;
584                 }
585         }
586
587         mlog_exit(status);
588         return status;
589 }
590
591 static int ocfs2_mkdir(struct inode *dir,
592                        struct dentry *dentry,
593                        int mode)
594 {
595         int ret;
596
597         mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
598                    dentry->d_name.len, dentry->d_name.name);
599         ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
600         mlog_exit(ret);
601
602         return ret;
603 }
604
605 static int ocfs2_create(struct inode *dir,
606                         struct dentry *dentry,
607                         int mode,
608                         struct nameidata *nd)
609 {
610         int ret;
611
612         mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
613                    dentry->d_name.len, dentry->d_name.name);
614         ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
615         mlog_exit(ret);
616
617         return ret;
618 }
619
620 static int ocfs2_link(struct dentry *old_dentry,
621                       struct inode *dir,
622                       struct dentry *dentry)
623 {
624         handle_t *handle;
625         struct inode *inode = old_dentry->d_inode;
626         int err;
627         struct buffer_head *fe_bh = NULL;
628         struct buffer_head *parent_fe_bh = NULL;
629         struct ocfs2_dinode *fe = NULL;
630         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
631         struct ocfs2_dir_lookup_result lookup = { NULL, };
632
633         mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino,
634                    old_dentry->d_name.len, old_dentry->d_name.name,
635                    dentry->d_name.len, dentry->d_name.name);
636
637         if (S_ISDIR(inode->i_mode))
638                 return -EPERM;
639
640         err = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
641         if (err < 0) {
642                 if (err != -ENOENT)
643                         mlog_errno(err);
644                 return err;
645         }
646
647         if (!dir->i_nlink) {
648                 err = -ENOENT;
649                 goto out;
650         }
651
652         err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
653                                         dentry->d_name.len);
654         if (err)
655                 goto out;
656
657         err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
658                                            dentry->d_name.name,
659                                            dentry->d_name.len, &lookup);
660         if (err < 0) {
661                 mlog_errno(err);
662                 goto out;
663         }
664
665         err = ocfs2_inode_lock(inode, &fe_bh, 1);
666         if (err < 0) {
667                 if (err != -ENOENT)
668                         mlog_errno(err);
669                 goto out;
670         }
671
672         fe = (struct ocfs2_dinode *) fe_bh->b_data;
673         if (le16_to_cpu(fe->i_links_count) >= OCFS2_LINK_MAX) {
674                 err = -EMLINK;
675                 goto out_unlock_inode;
676         }
677
678         handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
679         if (IS_ERR(handle)) {
680                 err = PTR_ERR(handle);
681                 handle = NULL;
682                 mlog_errno(err);
683                 goto out_unlock_inode;
684         }
685
686         err = ocfs2_journal_access_di(handle, inode, fe_bh,
687                                       OCFS2_JOURNAL_ACCESS_WRITE);
688         if (err < 0) {
689                 mlog_errno(err);
690                 goto out_commit;
691         }
692
693         inc_nlink(inode);
694         inode->i_ctime = CURRENT_TIME;
695         fe->i_links_count = cpu_to_le16(inode->i_nlink);
696         fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
697         fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
698
699         err = ocfs2_journal_dirty(handle, fe_bh);
700         if (err < 0) {
701                 le16_add_cpu(&fe->i_links_count, -1);
702                 drop_nlink(inode);
703                 mlog_errno(err);
704                 goto out_commit;
705         }
706
707         err = ocfs2_add_entry(handle, dentry, inode,
708                               OCFS2_I(inode)->ip_blkno,
709                               parent_fe_bh, &lookup);
710         if (err) {
711                 le16_add_cpu(&fe->i_links_count, -1);
712                 drop_nlink(inode);
713                 mlog_errno(err);
714                 goto out_commit;
715         }
716
717         err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
718         if (err) {
719                 mlog_errno(err);
720                 goto out_commit;
721         }
722
723         atomic_inc(&inode->i_count);
724         dentry->d_op = &ocfs2_dentry_ops;
725         d_instantiate(dentry, inode);
726
727 out_commit:
728         ocfs2_commit_trans(osb, handle);
729 out_unlock_inode:
730         ocfs2_inode_unlock(inode, 1);
731
732 out:
733         ocfs2_inode_unlock(dir, 1);
734
735         brelse(fe_bh);
736         brelse(parent_fe_bh);
737
738         ocfs2_free_dir_lookup_result(&lookup);
739
740         mlog_exit(err);
741
742         return err;
743 }
744
745 /*
746  * Takes and drops an exclusive lock on the given dentry. This will
747  * force other nodes to drop it.
748  */
749 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
750 {
751         int ret;
752
753         ret = ocfs2_dentry_lock(dentry, 1);
754         if (ret)
755                 mlog_errno(ret);
756         else
757                 ocfs2_dentry_unlock(dentry, 1);
758
759         return ret;
760 }
761
762 static inline int inode_is_unlinkable(struct inode *inode)
763 {
764         if (S_ISDIR(inode->i_mode)) {
765                 if (inode->i_nlink == 2)
766                         return 1;
767                 return 0;
768         }
769
770         if (inode->i_nlink == 1)
771                 return 1;
772         return 0;
773 }
774
775 static int ocfs2_unlink(struct inode *dir,
776                         struct dentry *dentry)
777 {
778         int status;
779         int child_locked = 0;
780         struct inode *inode = dentry->d_inode;
781         struct inode *orphan_dir = NULL;
782         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
783         u64 blkno;
784         struct ocfs2_dinode *fe = NULL;
785         struct buffer_head *fe_bh = NULL;
786         struct buffer_head *parent_node_bh = NULL;
787         handle_t *handle = NULL;
788         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
789         struct ocfs2_dir_lookup_result lookup = { NULL, };
790         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
791
792         mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
793                    dentry->d_name.len, dentry->d_name.name);
794
795         BUG_ON(dentry->d_parent->d_inode != dir);
796
797         mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno);
798
799         if (inode == osb->root_inode) {
800                 mlog(0, "Cannot delete the root directory\n");
801                 return -EPERM;
802         }
803
804         status = ocfs2_inode_lock(dir, &parent_node_bh, 1);
805         if (status < 0) {
806                 if (status != -ENOENT)
807                         mlog_errno(status);
808                 return status;
809         }
810
811         status = ocfs2_find_files_on_disk(dentry->d_name.name,
812                                           dentry->d_name.len, &blkno, dir,
813                                           &lookup);
814         if (status < 0) {
815                 if (status != -ENOENT)
816                         mlog_errno(status);
817                 goto leave;
818         }
819
820         if (OCFS2_I(inode)->ip_blkno != blkno) {
821                 status = -ENOENT;
822
823                 mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n",
824                      (unsigned long long)OCFS2_I(inode)->ip_blkno,
825                      (unsigned long long)blkno, OCFS2_I(inode)->ip_flags);
826                 goto leave;
827         }
828
829         status = ocfs2_inode_lock(inode, &fe_bh, 1);
830         if (status < 0) {
831                 if (status != -ENOENT)
832                         mlog_errno(status);
833                 goto leave;
834         }
835         child_locked = 1;
836
837         if (S_ISDIR(inode->i_mode)) {
838                 if (!ocfs2_empty_dir(inode)) {
839                         status = -ENOTEMPTY;
840                         goto leave;
841                 } else if (inode->i_nlink != 2) {
842                         status = -ENOTEMPTY;
843                         goto leave;
844                 }
845         }
846
847         status = ocfs2_remote_dentry_delete(dentry);
848         if (status < 0) {
849                 /* This remote delete should succeed under all normal
850                  * circumstances. */
851                 mlog_errno(status);
852                 goto leave;
853         }
854
855         if (inode_is_unlinkable(inode)) {
856                 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, inode,
857                                                   orphan_name, &orphan_insert);
858                 if (status < 0) {
859                         mlog_errno(status);
860                         goto leave;
861                 }
862         }
863
864         handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
865         if (IS_ERR(handle)) {
866                 status = PTR_ERR(handle);
867                 handle = NULL;
868                 mlog_errno(status);
869                 goto leave;
870         }
871
872         status = ocfs2_journal_access_di(handle, inode, fe_bh,
873                                          OCFS2_JOURNAL_ACCESS_WRITE);
874         if (status < 0) {
875                 mlog_errno(status);
876                 goto leave;
877         }
878
879         fe = (struct ocfs2_dinode *) fe_bh->b_data;
880
881         if (inode_is_unlinkable(inode)) {
882                 status = ocfs2_orphan_add(osb, handle, inode, fe, orphan_name,
883                                           &orphan_insert, orphan_dir);
884                 if (status < 0) {
885                         mlog_errno(status);
886                         goto leave;
887                 }
888         }
889
890         /* delete the name from the parent dir */
891         status = ocfs2_delete_entry(handle, dir, &lookup);
892         if (status < 0) {
893                 mlog_errno(status);
894                 goto leave;
895         }
896
897         if (S_ISDIR(inode->i_mode))
898                 drop_nlink(inode);
899         drop_nlink(inode);
900         fe->i_links_count = cpu_to_le16(inode->i_nlink);
901
902         status = ocfs2_journal_dirty(handle, fe_bh);
903         if (status < 0) {
904                 mlog_errno(status);
905                 goto leave;
906         }
907
908         dir->i_ctime = dir->i_mtime = CURRENT_TIME;
909         if (S_ISDIR(inode->i_mode))
910                 drop_nlink(dir);
911
912         status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
913         if (status < 0) {
914                 mlog_errno(status);
915                 if (S_ISDIR(inode->i_mode))
916                         inc_nlink(dir);
917         }
918
919 leave:
920         if (handle)
921                 ocfs2_commit_trans(osb, handle);
922
923         if (child_locked)
924                 ocfs2_inode_unlock(inode, 1);
925
926         ocfs2_inode_unlock(dir, 1);
927
928         if (orphan_dir) {
929                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
930                 ocfs2_inode_unlock(orphan_dir, 1);
931                 mutex_unlock(&orphan_dir->i_mutex);
932                 iput(orphan_dir);
933         }
934
935         brelse(fe_bh);
936         brelse(parent_node_bh);
937
938         ocfs2_free_dir_lookup_result(&orphan_insert);
939         ocfs2_free_dir_lookup_result(&lookup);
940
941         mlog_exit(status);
942
943         return status;
944 }
945
946 /*
947  * The only place this should be used is rename!
948  * if they have the same id, then the 1st one is the only one locked.
949  */
950 static int ocfs2_double_lock(struct ocfs2_super *osb,
951                              struct buffer_head **bh1,
952                              struct inode *inode1,
953                              struct buffer_head **bh2,
954                              struct inode *inode2)
955 {
956         int status;
957         struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
958         struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
959         struct buffer_head **tmpbh;
960         struct inode *tmpinode;
961
962         mlog_entry("(inode1 = %llu, inode2 = %llu)\n",
963                    (unsigned long long)oi1->ip_blkno,
964                    (unsigned long long)oi2->ip_blkno);
965
966         if (*bh1)
967                 *bh1 = NULL;
968         if (*bh2)
969                 *bh2 = NULL;
970
971         /* we always want to lock the one with the lower lockid first. */
972         if (oi1->ip_blkno != oi2->ip_blkno) {
973                 if (oi1->ip_blkno < oi2->ip_blkno) {
974                         /* switch id1 and id2 around */
975                         mlog(0, "switching them around...\n");
976                         tmpbh = bh2;
977                         bh2 = bh1;
978                         bh1 = tmpbh;
979
980                         tmpinode = inode2;
981                         inode2 = inode1;
982                         inode1 = tmpinode;
983                 }
984                 /* lock id2 */
985                 status = ocfs2_inode_lock(inode2, bh2, 1);
986                 if (status < 0) {
987                         if (status != -ENOENT)
988                                 mlog_errno(status);
989                         goto bail;
990                 }
991         }
992
993         /* lock id1 */
994         status = ocfs2_inode_lock(inode1, bh1, 1);
995         if (status < 0) {
996                 /*
997                  * An error return must mean that no cluster locks
998                  * were held on function exit.
999                  */
1000                 if (oi1->ip_blkno != oi2->ip_blkno)
1001                         ocfs2_inode_unlock(inode2, 1);
1002
1003                 if (status != -ENOENT)
1004                         mlog_errno(status);
1005         }
1006
1007 bail:
1008         mlog_exit(status);
1009         return status;
1010 }
1011
1012 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1013 {
1014         ocfs2_inode_unlock(inode1, 1);
1015
1016         if (inode1 != inode2)
1017                 ocfs2_inode_unlock(inode2, 1);
1018 }
1019
1020 static int ocfs2_rename(struct inode *old_dir,
1021                         struct dentry *old_dentry,
1022                         struct inode *new_dir,
1023                         struct dentry *new_dentry)
1024 {
1025         int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1026         int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1027         struct inode *old_inode = old_dentry->d_inode;
1028         struct inode *new_inode = new_dentry->d_inode;
1029         struct inode *orphan_dir = NULL;
1030         struct ocfs2_dinode *newfe = NULL;
1031         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1032         struct buffer_head *orphan_entry_bh = NULL;
1033         struct buffer_head *newfe_bh = NULL;
1034         struct buffer_head *old_inode_bh = NULL;
1035         struct buffer_head *insert_entry_bh = NULL;
1036         struct ocfs2_super *osb = NULL;
1037         u64 newfe_blkno, old_de_ino;
1038         handle_t *handle = NULL;
1039         struct buffer_head *old_dir_bh = NULL;
1040         struct buffer_head *new_dir_bh = NULL;
1041         nlink_t old_dir_nlink = old_dir->i_nlink;
1042         struct ocfs2_dinode *old_di;
1043         struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1044         struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1045         struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1046         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1047         struct ocfs2_dir_lookup_result target_insert = { NULL, };
1048
1049         /* At some point it might be nice to break this function up a
1050          * bit. */
1051
1052         mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n",
1053                    old_dir, old_dentry, new_dir, new_dentry,
1054                    old_dentry->d_name.len, old_dentry->d_name.name,
1055                    new_dentry->d_name.len, new_dentry->d_name.name);
1056
1057         osb = OCFS2_SB(old_dir->i_sb);
1058
1059         if (new_inode) {
1060                 if (!igrab(new_inode))
1061                         BUG();
1062         }
1063
1064         /* Assume a directory hierarchy thusly:
1065          * a/b/c
1066          * a/d
1067          * a,b,c, and d are all directories.
1068          *
1069          * from cwd of 'a' on both nodes:
1070          * node1: mv b/c d
1071          * node2: mv d   b/c
1072          *
1073          * And that's why, just like the VFS, we need a file system
1074          * rename lock. */
1075         if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1076                 status = ocfs2_rename_lock(osb);
1077                 if (status < 0) {
1078                         mlog_errno(status);
1079                         goto bail;
1080                 }
1081                 rename_lock = 1;
1082         }
1083
1084         /* if old and new are the same, this'll just do one lock. */
1085         status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1086                                    &new_dir_bh, new_dir);
1087         if (status < 0) {
1088                 mlog_errno(status);
1089                 goto bail;
1090         }
1091         parents_locked = 1;
1092
1093         /* make sure both dirs have bhs
1094          * get an extra ref on old_dir_bh if old==new */
1095         if (!new_dir_bh) {
1096                 if (old_dir_bh) {
1097                         new_dir_bh = old_dir_bh;
1098                         get_bh(new_dir_bh);
1099                 } else {
1100                         mlog(ML_ERROR, "no old_dir_bh!\n");
1101                         status = -EIO;
1102                         goto bail;
1103                 }
1104         }
1105
1106         /*
1107          * Aside from allowing a meta data update, the locking here
1108          * also ensures that the downconvert thread on other nodes
1109          * won't have to concurrently downconvert the inode and the
1110          * dentry locks.
1111          */
1112         status = ocfs2_inode_lock(old_inode, &old_inode_bh, 1);
1113         if (status < 0) {
1114                 if (status != -ENOENT)
1115                         mlog_errno(status);
1116                 goto bail;
1117         }
1118         old_child_locked = 1;
1119
1120         status = ocfs2_remote_dentry_delete(old_dentry);
1121         if (status < 0) {
1122                 mlog_errno(status);
1123                 goto bail;
1124         }
1125
1126         if (S_ISDIR(old_inode->i_mode)) {
1127                 u64 old_inode_parent;
1128
1129                 update_dot_dot = 1;
1130                 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1131                                                   old_inode,
1132                                                   &old_inode_dot_dot_res);
1133                 if (status) {
1134                         status = -EIO;
1135                         goto bail;
1136                 }
1137
1138                 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1139                         status = -EIO;
1140                         goto bail;
1141                 }
1142
1143                 if (!new_inode && new_dir != old_dir &&
1144                     new_dir->i_nlink >= OCFS2_LINK_MAX) {
1145                         status = -EMLINK;
1146                         goto bail;
1147                 }
1148         }
1149
1150         status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1151                                             old_dentry->d_name.len,
1152                                             &old_de_ino);
1153         if (status) {
1154                 status = -ENOENT;
1155                 goto bail;
1156         }
1157
1158         /*
1159          *  Check for inode number is _not_ due to possible IO errors.
1160          *  We might rmdir the source, keep it as pwd of some process
1161          *  and merrily kill the link to whatever was created under the
1162          *  same name. Goodbye sticky bit ;-<
1163          */
1164         if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1165                 status = -ENOENT;
1166                 goto bail;
1167         }
1168
1169         /* check if the target already exists (in which case we need
1170          * to delete it */
1171         status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1172                                           new_dentry->d_name.len,
1173                                           &newfe_blkno, new_dir,
1174                                           &target_lookup_res);
1175         /* The only error we allow here is -ENOENT because the new
1176          * file not existing is perfectly valid. */
1177         if ((status < 0) && (status != -ENOENT)) {
1178                 /* If we cannot find the file specified we should just */
1179                 /* return the error... */
1180                 mlog_errno(status);
1181                 goto bail;
1182         }
1183         if (status == 0)
1184                 target_exists = 1;
1185
1186         if (!target_exists && new_inode) {
1187                 /*
1188                  * Target was unlinked by another node while we were
1189                  * waiting to get to ocfs2_rename(). There isn't
1190                  * anything we can do here to help the situation, so
1191                  * bubble up the appropriate error.
1192                  */
1193                 status = -ENOENT;
1194                 goto bail;
1195         }
1196
1197         /* In case we need to overwrite an existing file, we blow it
1198          * away first */
1199         if (target_exists) {
1200                 /* VFS didn't think there existed an inode here, but
1201                  * someone else in the cluster must have raced our
1202                  * rename to create one. Today we error cleanly, in
1203                  * the future we should consider calling iget to build
1204                  * a new struct inode for this entry. */
1205                 if (!new_inode) {
1206                         status = -EACCES;
1207
1208                         mlog(0, "We found an inode for name %.*s but VFS "
1209                              "didn't give us one.\n", new_dentry->d_name.len,
1210                              new_dentry->d_name.name);
1211                         goto bail;
1212                 }
1213
1214                 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1215                         status = -EACCES;
1216
1217                         mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n",
1218                              (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1219                              (unsigned long long)newfe_blkno,
1220                              OCFS2_I(new_inode)->ip_flags);
1221                         goto bail;
1222                 }
1223
1224                 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1225                 if (status < 0) {
1226                         if (status != -ENOENT)
1227                                 mlog_errno(status);
1228                         goto bail;
1229                 }
1230                 new_child_locked = 1;
1231
1232                 status = ocfs2_remote_dentry_delete(new_dentry);
1233                 if (status < 0) {
1234                         mlog_errno(status);
1235                         goto bail;
1236                 }
1237
1238                 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1239
1240                 mlog(0, "aha rename over existing... new_blkno=%llu "
1241                      "newfebh=%p bhblocknr=%llu\n",
1242                      (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1243                      (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1244
1245                 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1246                         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1247                                                           new_inode,
1248                                                           orphan_name,
1249                                                           &orphan_insert);
1250                         if (status < 0) {
1251                                 mlog_errno(status);
1252                                 goto bail;
1253                         }
1254                 }
1255         } else {
1256                 BUG_ON(new_dentry->d_parent->d_inode != new_dir);
1257
1258                 status = ocfs2_check_dir_for_entry(new_dir,
1259                                                    new_dentry->d_name.name,
1260                                                    new_dentry->d_name.len);
1261                 if (status)
1262                         goto bail;
1263
1264                 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1265                                                       new_dentry->d_name.name,
1266                                                       new_dentry->d_name.len,
1267                                                       &target_insert);
1268                 if (status < 0) {
1269                         mlog_errno(status);
1270                         goto bail;
1271                 }
1272         }
1273
1274         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1275         if (IS_ERR(handle)) {
1276                 status = PTR_ERR(handle);
1277                 handle = NULL;
1278                 mlog_errno(status);
1279                 goto bail;
1280         }
1281
1282         if (target_exists) {
1283                 if (S_ISDIR(new_inode->i_mode)) {
1284                         if (!ocfs2_empty_dir(new_inode) ||
1285                             new_inode->i_nlink != 2) {
1286                                 status = -ENOTEMPTY;
1287                                 goto bail;
1288                         }
1289                 }
1290                 status = ocfs2_journal_access_di(handle, new_inode, newfe_bh,
1291                                                  OCFS2_JOURNAL_ACCESS_WRITE);
1292                 if (status < 0) {
1293                         mlog_errno(status);
1294                         goto bail;
1295                 }
1296
1297                 if (S_ISDIR(new_inode->i_mode) ||
1298                     (newfe->i_links_count == cpu_to_le16(1))){
1299                         status = ocfs2_orphan_add(osb, handle, new_inode,
1300                                                   newfe, orphan_name,
1301                                                   &orphan_insert, orphan_dir);
1302                         if (status < 0) {
1303                                 mlog_errno(status);
1304                                 goto bail;
1305                         }
1306                 }
1307
1308                 /* change the dirent to point to the correct inode */
1309                 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1310                                             old_inode);
1311                 if (status < 0) {
1312                         mlog_errno(status);
1313                         goto bail;
1314                 }
1315                 new_dir->i_version++;
1316
1317                 if (S_ISDIR(new_inode->i_mode))
1318                         newfe->i_links_count = 0;
1319                 else
1320                         le16_add_cpu(&newfe->i_links_count, -1);
1321
1322                 status = ocfs2_journal_dirty(handle, newfe_bh);
1323                 if (status < 0) {
1324                         mlog_errno(status);
1325                         goto bail;
1326                 }
1327         } else {
1328                 /* if the name was not found in new_dir, add it now */
1329                 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1330                                          OCFS2_I(old_inode)->ip_blkno,
1331                                          new_dir_bh, &target_insert);
1332         }
1333
1334         old_inode->i_ctime = CURRENT_TIME;
1335         mark_inode_dirty(old_inode);
1336
1337         status = ocfs2_journal_access_di(handle, old_inode, old_inode_bh,
1338                                          OCFS2_JOURNAL_ACCESS_WRITE);
1339         if (status >= 0) {
1340                 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1341
1342                 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1343                 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1344
1345                 status = ocfs2_journal_dirty(handle, old_inode_bh);
1346                 if (status < 0)
1347                         mlog_errno(status);
1348         } else
1349                 mlog_errno(status);
1350
1351         /*
1352          * Now that the name has been added to new_dir, remove the old name.
1353          *
1354          * We don't keep any directory entry context around until now
1355          * because the insert might have changed the type of directory
1356          * we're dealing with.
1357          */
1358         status = ocfs2_find_entry(old_dentry->d_name.name,
1359                                   old_dentry->d_name.len, old_dir,
1360                                   &old_entry_lookup);
1361         if (status)
1362                 goto bail;
1363
1364         status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1365         if (status < 0) {
1366                 mlog_errno(status);
1367                 goto bail;
1368         }
1369
1370         if (new_inode) {
1371                 new_inode->i_nlink--;
1372                 new_inode->i_ctime = CURRENT_TIME;
1373         }
1374         old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1375
1376         if (update_dot_dot) {
1377                 status = ocfs2_update_entry(old_inode, handle,
1378                                             &old_inode_dot_dot_res, new_dir);
1379                 old_dir->i_nlink--;
1380                 if (new_inode) {
1381                         new_inode->i_nlink--;
1382                 } else {
1383                         inc_nlink(new_dir);
1384                         mark_inode_dirty(new_dir);
1385                 }
1386         }
1387         mark_inode_dirty(old_dir);
1388         ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1389         if (new_inode) {
1390                 mark_inode_dirty(new_inode);
1391                 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1392         }
1393
1394         if (old_dir != new_dir) {
1395                 /* Keep the same times on both directories.*/
1396                 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1397
1398                 /*
1399                  * This will also pick up the i_nlink change from the
1400                  * block above.
1401                  */
1402                 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1403         }
1404
1405         if (old_dir_nlink != old_dir->i_nlink) {
1406                 if (!old_dir_bh) {
1407                         mlog(ML_ERROR, "need to change nlink for old dir "
1408                              "%llu from %d to %d but bh is NULL!\n",
1409                              (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1410                              (int)old_dir_nlink, old_dir->i_nlink);
1411                 } else {
1412                         struct ocfs2_dinode *fe;
1413                         status = ocfs2_journal_access_di(handle, old_dir,
1414                                                          old_dir_bh,
1415                                                          OCFS2_JOURNAL_ACCESS_WRITE);
1416                         fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1417                         fe->i_links_count = cpu_to_le16(old_dir->i_nlink);
1418                         status = ocfs2_journal_dirty(handle, old_dir_bh);
1419                 }
1420         }
1421
1422         ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1423         status = 0;
1424 bail:
1425         if (rename_lock)
1426                 ocfs2_rename_unlock(osb);
1427
1428         if (handle)
1429                 ocfs2_commit_trans(osb, handle);
1430
1431         if (parents_locked)
1432                 ocfs2_double_unlock(old_dir, new_dir);
1433
1434         if (old_child_locked)
1435                 ocfs2_inode_unlock(old_inode, 1);
1436
1437         if (new_child_locked)
1438                 ocfs2_inode_unlock(new_inode, 1);
1439
1440         if (orphan_dir) {
1441                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1442                 ocfs2_inode_unlock(orphan_dir, 1);
1443                 mutex_unlock(&orphan_dir->i_mutex);
1444                 iput(orphan_dir);
1445         }
1446
1447         if (new_inode)
1448                 sync_mapping_buffers(old_inode->i_mapping);
1449
1450         if (new_inode)
1451                 iput(new_inode);
1452
1453         ocfs2_free_dir_lookup_result(&target_lookup_res);
1454         ocfs2_free_dir_lookup_result(&old_entry_lookup);
1455         ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1456         ocfs2_free_dir_lookup_result(&orphan_insert);
1457         ocfs2_free_dir_lookup_result(&target_insert);
1458
1459         brelse(newfe_bh);
1460         brelse(old_inode_bh);
1461         brelse(old_dir_bh);
1462         brelse(new_dir_bh);
1463         brelse(orphan_entry_bh);
1464         brelse(insert_entry_bh);
1465
1466         mlog_exit(status);
1467
1468         return status;
1469 }
1470
1471 /*
1472  * we expect i_size = strlen(symname). Copy symname into the file
1473  * data, including the null terminator.
1474  */
1475 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1476                                      handle_t *handle,
1477                                      struct inode *inode,
1478                                      const char *symname)
1479 {
1480         struct buffer_head **bhs = NULL;
1481         const char *c;
1482         struct super_block *sb = osb->sb;
1483         u64 p_blkno, p_blocks;
1484         int virtual, blocks, status, i, bytes_left;
1485
1486         bytes_left = i_size_read(inode) + 1;
1487         /* we can't trust i_blocks because we're actually going to
1488          * write i_size + 1 bytes. */
1489         blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1490
1491         mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n",
1492                         (unsigned long long)inode->i_blocks,
1493                         i_size_read(inode), blocks);
1494
1495         /* Sanity check -- make sure we're going to fit. */
1496         if (bytes_left >
1497             ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1498                 status = -EIO;
1499                 mlog_errno(status);
1500                 goto bail;
1501         }
1502
1503         bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1504         if (!bhs) {
1505                 status = -ENOMEM;
1506                 mlog_errno(status);
1507                 goto bail;
1508         }
1509
1510         status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1511                                              NULL);
1512         if (status < 0) {
1513                 mlog_errno(status);
1514                 goto bail;
1515         }
1516
1517         /* links can never be larger than one cluster so we know this
1518          * is all going to be contiguous, but do a sanity check
1519          * anyway. */
1520         if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1521                 status = -EIO;
1522                 mlog_errno(status);
1523                 goto bail;
1524         }
1525
1526         virtual = 0;
1527         while(bytes_left > 0) {
1528                 c = &symname[virtual * sb->s_blocksize];
1529
1530                 bhs[virtual] = sb_getblk(sb, p_blkno);
1531                 if (!bhs[virtual]) {
1532                         status = -ENOMEM;
1533                         mlog_errno(status);
1534                         goto bail;
1535                 }
1536                 ocfs2_set_new_buffer_uptodate(inode, bhs[virtual]);
1537
1538                 status = ocfs2_journal_access(handle, inode, bhs[virtual],
1539                                               OCFS2_JOURNAL_ACCESS_CREATE);
1540                 if (status < 0) {
1541                         mlog_errno(status);
1542                         goto bail;
1543                 }
1544
1545                 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1546
1547                 memcpy(bhs[virtual]->b_data, c,
1548                        (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1549                        bytes_left);
1550
1551                 status = ocfs2_journal_dirty(handle, bhs[virtual]);
1552                 if (status < 0) {
1553                         mlog_errno(status);
1554                         goto bail;
1555                 }
1556
1557                 virtual++;
1558                 p_blkno++;
1559                 bytes_left -= sb->s_blocksize;
1560         }
1561
1562         status = 0;
1563 bail:
1564
1565         if (bhs) {
1566                 for(i = 0; i < blocks; i++)
1567                         brelse(bhs[i]);
1568                 kfree(bhs);
1569         }
1570
1571         mlog_exit(status);
1572         return status;
1573 }
1574
1575 static int ocfs2_symlink(struct inode *dir,
1576                          struct dentry *dentry,
1577                          const char *symname)
1578 {
1579         int status, l, credits;
1580         u64 newsize;
1581         struct ocfs2_super *osb = NULL;
1582         struct inode *inode = NULL;
1583         struct super_block *sb;
1584         struct buffer_head *new_fe_bh = NULL;
1585         struct buffer_head *parent_fe_bh = NULL;
1586         struct ocfs2_dinode *fe = NULL;
1587         struct ocfs2_dinode *dirfe;
1588         handle_t *handle = NULL;
1589         struct ocfs2_alloc_context *inode_ac = NULL;
1590         struct ocfs2_alloc_context *data_ac = NULL;
1591         struct ocfs2_alloc_context *xattr_ac = NULL;
1592         int want_clusters = 0;
1593         int xattr_credits = 0;
1594         struct ocfs2_security_xattr_info si = {
1595                 .enable = 1,
1596         };
1597         int did_quota = 0, did_quota_inode = 0;
1598         struct ocfs2_dir_lookup_result lookup = { NULL, };
1599
1600         mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir,
1601                    dentry, symname, dentry->d_name.len, dentry->d_name.name);
1602
1603         sb = dir->i_sb;
1604         osb = OCFS2_SB(sb);
1605
1606         l = strlen(symname) + 1;
1607
1608         credits = ocfs2_calc_symlink_credits(sb);
1609
1610         /* lock the parent directory */
1611         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1612         if (status < 0) {
1613                 if (status != -ENOENT)
1614                         mlog_errno(status);
1615                 return status;
1616         }
1617
1618         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1619         if (!dirfe->i_links_count) {
1620                 /* can't make a file in a deleted directory. */
1621                 status = -ENOENT;
1622                 goto bail;
1623         }
1624
1625         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1626                                            dentry->d_name.len);
1627         if (status)
1628                 goto bail;
1629
1630         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1631                                               dentry->d_name.name,
1632                                               dentry->d_name.len, &lookup);
1633         if (status < 0) {
1634                 mlog_errno(status);
1635                 goto bail;
1636         }
1637
1638         status = ocfs2_reserve_new_inode(osb, &inode_ac);
1639         if (status < 0) {
1640                 if (status != -ENOSPC)
1641                         mlog_errno(status);
1642                 goto bail;
1643         }
1644
1645         inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1646         if (!inode) {
1647                 status = -ENOMEM;
1648                 mlog_errno(status);
1649                 goto bail;
1650         }
1651
1652         /* get security xattr */
1653         status = ocfs2_init_security_get(inode, dir, &si);
1654         if (status) {
1655                 if (status == -EOPNOTSUPP)
1656                         si.enable = 0;
1657                 else {
1658                         mlog_errno(status);
1659                         goto bail;
1660                 }
1661         }
1662
1663         /* calculate meta data/clusters for setting security xattr */
1664         if (si.enable) {
1665                 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1666                                                   &xattr_credits, &xattr_ac);
1667                 if (status < 0) {
1668                         mlog_errno(status);
1669                         goto bail;
1670                 }
1671         }
1672
1673         /* don't reserve bitmap space for fast symlinks. */
1674         if (l > ocfs2_fast_symlink_chars(sb))
1675                 want_clusters += 1;
1676
1677         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1678         if (status < 0) {
1679                 if (status != -ENOSPC)
1680                         mlog_errno(status);
1681                 goto bail;
1682         }
1683
1684         handle = ocfs2_start_trans(osb, credits + xattr_credits);
1685         if (IS_ERR(handle)) {
1686                 status = PTR_ERR(handle);
1687                 handle = NULL;
1688                 mlog_errno(status);
1689                 goto bail;
1690         }
1691
1692         /* We don't use standard VFS wrapper because we don't want vfs_dq_init
1693          * to be called. */
1694         if (sb_any_quota_active(osb->sb) &&
1695             osb->sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA) {
1696                 status = -EDQUOT;
1697                 goto bail;
1698         }
1699         did_quota_inode = 1;
1700
1701         status = ocfs2_mknod_locked(osb, dir, inode, dentry,
1702                                     0, &new_fe_bh, parent_fe_bh, handle,
1703                                     inode_ac);
1704         if (status < 0) {
1705                 mlog_errno(status);
1706                 goto bail;
1707         }
1708
1709         fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1710         inode->i_rdev = 0;
1711         newsize = l - 1;
1712         if (l > ocfs2_fast_symlink_chars(sb)) {
1713                 u32 offset = 0;
1714
1715                 inode->i_op = &ocfs2_symlink_inode_operations;
1716                 if (vfs_dq_alloc_space_nodirty(inode,
1717                     ocfs2_clusters_to_bytes(osb->sb, 1))) {
1718                         status = -EDQUOT;
1719                         goto bail;
1720                 }
1721                 did_quota = 1;
1722                 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1723                                               new_fe_bh,
1724                                               handle, data_ac, NULL,
1725                                               NULL);
1726                 if (status < 0) {
1727                         if (status != -ENOSPC && status != -EINTR) {
1728                                 mlog(ML_ERROR,
1729                                      "Failed to extend file to %llu\n",
1730                                      (unsigned long long)newsize);
1731                                 mlog_errno(status);
1732                                 status = -ENOSPC;
1733                         }
1734                         goto bail;
1735                 }
1736                 i_size_write(inode, newsize);
1737                 inode->i_blocks = ocfs2_inode_sector_count(inode);
1738         } else {
1739                 inode->i_op = &ocfs2_fast_symlink_inode_operations;
1740                 memcpy((char *) fe->id2.i_symlink, symname, l);
1741                 i_size_write(inode, newsize);
1742                 inode->i_blocks = 0;
1743         }
1744
1745         status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1746         if (status < 0) {
1747                 mlog_errno(status);
1748                 goto bail;
1749         }
1750
1751         if (!ocfs2_inode_is_fast_symlink(inode)) {
1752                 status = ocfs2_create_symlink_data(osb, handle, inode,
1753                                                    symname);
1754                 if (status < 0) {
1755                         mlog_errno(status);
1756                         goto bail;
1757                 }
1758         }
1759
1760         if (si.enable) {
1761                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1762                                                  xattr_ac, data_ac);
1763                 if (status < 0) {
1764                         mlog_errno(status);
1765                         goto bail;
1766                 }
1767         }
1768
1769         status = ocfs2_add_entry(handle, dentry, inode,
1770                                  le64_to_cpu(fe->i_blkno), parent_fe_bh,
1771                                  &lookup);
1772         if (status < 0) {
1773                 mlog_errno(status);
1774                 goto bail;
1775         }
1776
1777         status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1778         if (status) {
1779                 mlog_errno(status);
1780                 goto bail;
1781         }
1782
1783         insert_inode_hash(inode);
1784         dentry->d_op = &ocfs2_dentry_ops;
1785         d_instantiate(dentry, inode);
1786 bail:
1787         if (status < 0 && did_quota)
1788                 vfs_dq_free_space_nodirty(inode,
1789                                         ocfs2_clusters_to_bytes(osb->sb, 1));
1790         if (status < 0 && did_quota_inode)
1791                 vfs_dq_free_inode(inode);
1792         if (handle)
1793                 ocfs2_commit_trans(osb, handle);
1794
1795         ocfs2_inode_unlock(dir, 1);
1796
1797         brelse(new_fe_bh);
1798         brelse(parent_fe_bh);
1799         kfree(si.name);
1800         kfree(si.value);
1801         ocfs2_free_dir_lookup_result(&lookup);
1802         if (inode_ac)
1803                 ocfs2_free_alloc_context(inode_ac);
1804         if (data_ac)
1805                 ocfs2_free_alloc_context(data_ac);
1806         if (xattr_ac)
1807                 ocfs2_free_alloc_context(xattr_ac);
1808         if ((status < 0) && inode) {
1809                 clear_nlink(inode);
1810                 iput(inode);
1811         }
1812
1813         mlog_exit(status);
1814
1815         return status;
1816 }
1817
1818 static int ocfs2_blkno_stringify(u64 blkno, char *name)
1819 {
1820         int status, namelen;
1821
1822         mlog_entry_void();
1823
1824         namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
1825                            (long long)blkno);
1826         if (namelen <= 0) {
1827                 if (namelen)
1828                         status = namelen;
1829                 else
1830                         status = -EINVAL;
1831                 mlog_errno(status);
1832                 goto bail;
1833         }
1834         if (namelen != OCFS2_ORPHAN_NAMELEN) {
1835                 status = -EINVAL;
1836                 mlog_errno(status);
1837                 goto bail;
1838         }
1839
1840         mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name,
1841              namelen);
1842
1843         status = 0;
1844 bail:
1845         mlog_exit(status);
1846         return status;
1847 }
1848
1849 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
1850                                     struct inode **ret_orphan_dir,
1851                                     struct inode *inode,
1852                                     char *name,
1853                                     struct ocfs2_dir_lookup_result *lookup)
1854 {
1855         struct inode *orphan_dir_inode;
1856         struct buffer_head *orphan_dir_bh = NULL;
1857         int status = 0;
1858
1859         status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
1860         if (status < 0) {
1861                 mlog_errno(status);
1862                 return status;
1863         }
1864
1865         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
1866                                                        ORPHAN_DIR_SYSTEM_INODE,
1867                                                        osb->slot_num);
1868         if (!orphan_dir_inode) {
1869                 status = -ENOENT;
1870                 mlog_errno(status);
1871                 return status;
1872         }
1873
1874         mutex_lock(&orphan_dir_inode->i_mutex);
1875
1876         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
1877         if (status < 0) {
1878                 mlog_errno(status);
1879                 goto leave;
1880         }
1881
1882         status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
1883                                               orphan_dir_bh, name,
1884                                               OCFS2_ORPHAN_NAMELEN, lookup);
1885         if (status < 0) {
1886                 ocfs2_inode_unlock(orphan_dir_inode, 1);
1887
1888                 mlog_errno(status);
1889                 goto leave;
1890         }
1891
1892         *ret_orphan_dir = orphan_dir_inode;
1893
1894 leave:
1895         if (status) {
1896                 mutex_unlock(&orphan_dir_inode->i_mutex);
1897                 iput(orphan_dir_inode);
1898         }
1899
1900         brelse(orphan_dir_bh);
1901
1902         mlog_exit(status);
1903         return status;
1904 }
1905
1906 static int ocfs2_orphan_add(struct ocfs2_super *osb,
1907                             handle_t *handle,
1908                             struct inode *inode,
1909                             struct ocfs2_dinode *fe,
1910                             char *name,
1911                             struct ocfs2_dir_lookup_result *lookup,
1912                             struct inode *orphan_dir_inode)
1913 {
1914         struct buffer_head *orphan_dir_bh = NULL;
1915         int status = 0;
1916         struct ocfs2_dinode *orphan_fe;
1917
1918         mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);
1919
1920         status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
1921         if (status < 0) {
1922                 mlog_errno(status);
1923                 goto leave;
1924         }
1925
1926         status = ocfs2_journal_access_di(handle, orphan_dir_inode, orphan_dir_bh,
1927                                          OCFS2_JOURNAL_ACCESS_WRITE);
1928         if (status < 0) {
1929                 mlog_errno(status);
1930                 goto leave;
1931         }
1932
1933         /* we're a cluster, and nlink can change on disk from
1934          * underneath us... */
1935         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
1936         if (S_ISDIR(inode->i_mode))
1937                 le16_add_cpu(&orphan_fe->i_links_count, 1);
1938         orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count);
1939
1940         status = ocfs2_journal_dirty(handle, orphan_dir_bh);
1941         if (status < 0) {
1942                 mlog_errno(status);
1943                 goto leave;
1944         }
1945
1946         status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
1947                                    OCFS2_ORPHAN_NAMELEN, inode,
1948                                    OCFS2_I(inode)->ip_blkno,
1949                                    orphan_dir_bh, lookup);
1950         if (status < 0) {
1951                 mlog_errno(status);
1952                 goto leave;
1953         }
1954
1955         le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL);
1956
1957         /* Record which orphan dir our inode now resides
1958          * in. delete_inode will use this to determine which orphan
1959          * dir to lock. */
1960         fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
1961
1962         mlog(0, "Inode %llu orphaned in slot %d\n",
1963              (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num);
1964
1965 leave:
1966         brelse(orphan_dir_bh);
1967
1968         mlog_exit(status);
1969         return status;
1970 }
1971
1972 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
1973 int ocfs2_orphan_del(struct ocfs2_super *osb,
1974                      handle_t *handle,
1975                      struct inode *orphan_dir_inode,
1976                      struct inode *inode,
1977                      struct buffer_head *orphan_dir_bh)
1978 {
1979         char name[OCFS2_ORPHAN_NAMELEN + 1];
1980         struct ocfs2_dinode *orphan_fe;
1981         int status = 0;
1982         struct ocfs2_dir_lookup_result lookup = { NULL, };
1983
1984         mlog_entry_void();
1985
1986         status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
1987         if (status < 0) {
1988                 mlog_errno(status);
1989                 goto leave;
1990         }
1991
1992         mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n",
1993              name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
1994              OCFS2_ORPHAN_NAMELEN);
1995
1996         /* find it's spot in the orphan directory */
1997         status = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, orphan_dir_inode,
1998                                   &lookup);
1999         if (status) {
2000                 mlog_errno(status);
2001                 goto leave;
2002         }
2003
2004         /* remove it from the orphan directory */
2005         status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2006         if (status < 0) {
2007                 mlog_errno(status);
2008                 goto leave;
2009         }
2010
2011         status = ocfs2_journal_access_di(handle,orphan_dir_inode,  orphan_dir_bh,
2012                                          OCFS2_JOURNAL_ACCESS_WRITE);
2013         if (status < 0) {
2014                 mlog_errno(status);
2015                 goto leave;
2016         }
2017
2018         /* do the i_nlink dance! :) */
2019         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2020         if (S_ISDIR(inode->i_mode))
2021                 le16_add_cpu(&orphan_fe->i_links_count, -1);
2022         orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count);
2023
2024         status = ocfs2_journal_dirty(handle, orphan_dir_bh);
2025         if (status < 0) {
2026                 mlog_errno(status);
2027                 goto leave;
2028         }
2029
2030 leave:
2031         ocfs2_free_dir_lookup_result(&lookup);
2032
2033         mlog_exit(status);
2034         return status;
2035 }
2036
2037 const struct inode_operations ocfs2_dir_iops = {
2038         .create         = ocfs2_create,
2039         .lookup         = ocfs2_lookup,
2040         .link           = ocfs2_link,
2041         .unlink         = ocfs2_unlink,
2042         .rmdir          = ocfs2_unlink,
2043         .symlink        = ocfs2_symlink,
2044         .mkdir          = ocfs2_mkdir,
2045         .mknod          = ocfs2_mknod,
2046         .rename         = ocfs2_rename,
2047         .setattr        = ocfs2_setattr,
2048         .getattr        = ocfs2_getattr,
2049         .permission     = ocfs2_permission,
2050         .setxattr       = generic_setxattr,
2051         .getxattr       = generic_getxattr,
2052         .listxattr      = ocfs2_listxattr,
2053         .removexattr    = generic_removexattr,
2054 };