GNU Linux-libre 4.19.211-gnu1
[releases.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 #include <linux/iversion.h>
45
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 #include "ocfs2_trace.h"
67
68 #include "buffer_head_io.h"
69
70 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
71                               struct inode *dir,
72                               struct inode *inode,
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                                     u64 blkno,
82                                     char *name,
83                                     struct ocfs2_dir_lookup_result *lookup,
84                                     bool dio);
85
86 static int ocfs2_orphan_add(struct ocfs2_super *osb,
87                             handle_t *handle,
88                             struct inode *inode,
89                             struct buffer_head *fe_bh,
90                             char *name,
91                             struct ocfs2_dir_lookup_result *lookup,
92                             struct inode *orphan_dir_inode,
93                             bool dio);
94
95 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
96                                      handle_t *handle,
97                                      struct inode *inode,
98                                      const char *symname);
99
100 static int ocfs2_double_lock(struct ocfs2_super *osb,
101                              struct buffer_head **bh1,
102                              struct inode *inode1,
103                              struct buffer_head **bh2,
104                              struct inode *inode2,
105                              int rename);
106
107 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2);
108 /* An orphan dir name is an 8 byte value, printed as a hex string */
109 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
110
111 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
112                                    unsigned int flags)
113 {
114         int status;
115         u64 blkno;
116         struct inode *inode = NULL;
117         struct dentry *ret;
118         struct ocfs2_inode_info *oi;
119
120         trace_ocfs2_lookup(dir, dentry, dentry->d_name.len,
121                            dentry->d_name.name,
122                            (unsigned long long)OCFS2_I(dir)->ip_blkno, 0);
123
124         if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
125                 ret = ERR_PTR(-ENAMETOOLONG);
126                 goto bail;
127         }
128
129         status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
130         if (status < 0) {
131                 if (status != -ENOENT)
132                         mlog_errno(status);
133                 ret = ERR_PTR(status);
134                 goto bail;
135         }
136
137         status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
138                                             dentry->d_name.len, &blkno);
139         if (status < 0)
140                 goto bail_add;
141
142         inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
143         if (IS_ERR(inode)) {
144                 ret = ERR_PTR(-EACCES);
145                 goto bail_unlock;
146         }
147
148         oi = OCFS2_I(inode);
149         /* Clear any orphaned state... If we were able to look up the
150          * inode from a directory, it certainly can't be orphaned. We
151          * might have the bad state from a node which intended to
152          * orphan this inode but crashed before it could commit the
153          * unlink. */
154         spin_lock(&oi->ip_lock);
155         oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
156         spin_unlock(&oi->ip_lock);
157
158 bail_add:
159         ret = d_splice_alias(inode, dentry);
160
161         if (inode) {
162                 /*
163                  * If d_splice_alias() finds a DCACHE_DISCONNECTED
164                  * dentry, it will d_move() it on top of ourse. The
165                  * return value will indicate this however, so in
166                  * those cases, we switch them around for the locking
167                  * code.
168                  *
169                  * NOTE: This dentry already has ->d_op set from
170                  * ocfs2_get_parent() and ocfs2_get_dentry()
171                  */
172                 if (!IS_ERR_OR_NULL(ret))
173                         dentry = ret;
174
175                 status = ocfs2_dentry_attach_lock(dentry, inode,
176                                                   OCFS2_I(dir)->ip_blkno);
177                 if (status) {
178                         mlog_errno(status);
179                         ret = ERR_PTR(status);
180                         goto bail_unlock;
181                 }
182         } else
183                 ocfs2_dentry_attach_gen(dentry);
184
185 bail_unlock:
186         /* Don't drop the cluster lock until *after* the d_add --
187          * unlink on another node will message us to remove that
188          * dentry under this lock so otherwise we can race this with
189          * the downconvert thread and have a stale dentry. */
190         ocfs2_inode_unlock(dir, 0);
191
192 bail:
193
194         trace_ocfs2_lookup_ret(ret);
195
196         return ret;
197 }
198
199 static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode)
200 {
201         struct inode *inode;
202         int status;
203
204         inode = new_inode(dir->i_sb);
205         if (!inode) {
206                 mlog(ML_ERROR, "new_inode failed!\n");
207                 return ERR_PTR(-ENOMEM);
208         }
209
210         /* populate as many fields early on as possible - many of
211          * these are used by the support functions here and in
212          * callers. */
213         if (S_ISDIR(mode))
214                 set_nlink(inode, 2);
215         inode_init_owner(inode, dir, mode);
216         status = dquot_initialize(inode);
217         if (status)
218                 return ERR_PTR(status);
219
220         return inode;
221 }
222
223 static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb,
224                 struct dentry *dentry, struct inode *inode)
225 {
226         struct ocfs2_dentry_lock *dl = dentry->d_fsdata;
227
228         ocfs2_simple_drop_lockres(osb, &dl->dl_lockres);
229         ocfs2_lock_res_free(&dl->dl_lockres);
230         BUG_ON(dl->dl_count != 1);
231         spin_lock(&dentry_attach_lock);
232         dentry->d_fsdata = NULL;
233         spin_unlock(&dentry_attach_lock);
234         kfree(dl);
235         iput(inode);
236 }
237
238 static int ocfs2_mknod(struct inode *dir,
239                        struct dentry *dentry,
240                        umode_t mode,
241                        dev_t dev)
242 {
243         int status = 0;
244         struct buffer_head *parent_fe_bh = NULL;
245         handle_t *handle = NULL;
246         struct ocfs2_super *osb;
247         struct ocfs2_dinode *dirfe;
248         struct buffer_head *new_fe_bh = NULL;
249         struct inode *inode = NULL;
250         struct ocfs2_alloc_context *inode_ac = NULL;
251         struct ocfs2_alloc_context *data_ac = NULL;
252         struct ocfs2_alloc_context *meta_ac = NULL;
253         int want_clusters = 0;
254         int want_meta = 0;
255         int xattr_credits = 0;
256         struct ocfs2_security_xattr_info si = {
257                 .enable = 1,
258         };
259         int did_quota_inode = 0;
260         struct ocfs2_dir_lookup_result lookup = { NULL, };
261         sigset_t oldset;
262         int did_block_signals = 0;
263         struct ocfs2_dentry_lock *dl = NULL;
264
265         trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
266                           (unsigned long long)OCFS2_I(dir)->ip_blkno,
267                           (unsigned long)dev, mode);
268
269         status = dquot_initialize(dir);
270         if (status) {
271                 mlog_errno(status);
272                 return status;
273         }
274
275         /* get our super block */
276         osb = OCFS2_SB(dir->i_sb);
277
278         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
279         if (status < 0) {
280                 if (status != -ENOENT)
281                         mlog_errno(status);
282                 return status;
283         }
284
285         if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
286                 status = -EMLINK;
287                 goto leave;
288         }
289
290         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
291         if (!ocfs2_read_links_count(dirfe)) {
292                 /* can't make a file in a deleted directory. */
293                 status = -ENOENT;
294                 goto leave;
295         }
296
297         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
298                                            dentry->d_name.len);
299         if (status)
300                 goto leave;
301
302         /* get a spot inside the dir. */
303         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
304                                               dentry->d_name.name,
305                                               dentry->d_name.len, &lookup);
306         if (status < 0) {
307                 mlog_errno(status);
308                 goto leave;
309         }
310
311         /* reserve an inode spot */
312         status = ocfs2_reserve_new_inode(osb, &inode_ac);
313         if (status < 0) {
314                 if (status != -ENOSPC)
315                         mlog_errno(status);
316                 goto leave;
317         }
318
319         inode = ocfs2_get_init_inode(dir, mode);
320         if (IS_ERR(inode)) {
321                 status = PTR_ERR(inode);
322                 inode = NULL;
323                 mlog_errno(status);
324                 goto leave;
325         }
326
327         /* get security xattr */
328         status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
329         if (status) {
330                 if (status == -EOPNOTSUPP)
331                         si.enable = 0;
332                 else {
333                         mlog_errno(status);
334                         goto leave;
335                 }
336         }
337
338         /* calculate meta data/clusters for setting security and acl xattr */
339         status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
340                                        &si, &want_clusters,
341                                        &xattr_credits, &want_meta);
342         if (status < 0) {
343                 mlog_errno(status);
344                 goto leave;
345         }
346
347         /* Reserve a cluster if creating an extent based directory. */
348         if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
349                 want_clusters += 1;
350
351                 /* Dir indexing requires extra space as well */
352                 if (ocfs2_supports_indexed_dirs(osb))
353                         want_meta++;
354         }
355
356         status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
357         if (status < 0) {
358                 if (status != -ENOSPC)
359                         mlog_errno(status);
360                 goto leave;
361         }
362
363         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
364         if (status < 0) {
365                 if (status != -ENOSPC)
366                         mlog_errno(status);
367                 goto leave;
368         }
369
370         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
371                                                             S_ISDIR(mode),
372                                                             xattr_credits));
373         if (IS_ERR(handle)) {
374                 status = PTR_ERR(handle);
375                 handle = NULL;
376                 mlog_errno(status);
377                 goto leave;
378         }
379
380         /* Starting to change things, restart is no longer possible. */
381         ocfs2_block_signals(&oldset);
382         did_block_signals = 1;
383
384         status = dquot_alloc_inode(inode);
385         if (status)
386                 goto leave;
387         did_quota_inode = 1;
388
389         /* do the real work now. */
390         status = ocfs2_mknod_locked(osb, dir, inode, dev,
391                                     &new_fe_bh, parent_fe_bh, handle,
392                                     inode_ac);
393         if (status < 0) {
394                 mlog_errno(status);
395                 goto leave;
396         }
397
398         if (S_ISDIR(mode)) {
399                 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
400                                             new_fe_bh, data_ac, meta_ac);
401                 if (status < 0) {
402                         mlog_errno(status);
403                         goto leave;
404                 }
405
406                 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
407                                                  parent_fe_bh,
408                                                  OCFS2_JOURNAL_ACCESS_WRITE);
409                 if (status < 0) {
410                         mlog_errno(status);
411                         goto leave;
412                 }
413                 ocfs2_add_links_count(dirfe, 1);
414                 ocfs2_journal_dirty(handle, parent_fe_bh);
415                 inc_nlink(dir);
416         }
417
418         status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
419                          meta_ac, data_ac);
420
421         if (status < 0) {
422                 mlog_errno(status);
423                 goto leave;
424         }
425
426         if (si.enable) {
427                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
428                                                  meta_ac, data_ac);
429                 if (status < 0) {
430                         mlog_errno(status);
431                         goto leave;
432                 }
433         }
434
435         /*
436          * Do this before adding the entry to the directory. We add
437          * also set d_op after success so that ->d_iput() will cleanup
438          * the dentry lock even if ocfs2_add_entry() fails below.
439          */
440         status = ocfs2_dentry_attach_lock(dentry, inode,
441                                           OCFS2_I(dir)->ip_blkno);
442         if (status) {
443                 mlog_errno(status);
444                 goto leave;
445         }
446
447         dl = dentry->d_fsdata;
448
449         status = ocfs2_add_entry(handle, dentry, inode,
450                                  OCFS2_I(inode)->ip_blkno, parent_fe_bh,
451                                  &lookup);
452         if (status < 0) {
453                 mlog_errno(status);
454                 goto leave;
455         }
456
457         insert_inode_hash(inode);
458         d_instantiate(dentry, inode);
459         status = 0;
460 leave:
461         if (status < 0 && did_quota_inode)
462                 dquot_free_inode(inode);
463         if (handle)
464                 ocfs2_commit_trans(osb, handle);
465
466         ocfs2_inode_unlock(dir, 1);
467         if (did_block_signals)
468                 ocfs2_unblock_signals(&oldset);
469
470         brelse(new_fe_bh);
471         brelse(parent_fe_bh);
472         kfree(si.value);
473
474         ocfs2_free_dir_lookup_result(&lookup);
475
476         if (inode_ac)
477                 ocfs2_free_alloc_context(inode_ac);
478
479         if (data_ac)
480                 ocfs2_free_alloc_context(data_ac);
481
482         if (meta_ac)
483                 ocfs2_free_alloc_context(meta_ac);
484
485         /*
486          * We should call iput after the i_mutex of the bitmap been
487          * unlocked in ocfs2_free_alloc_context, or the
488          * ocfs2_delete_inode will mutex_lock again.
489          */
490         if ((status < 0) && inode) {
491                 if (dl)
492                         ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
493
494                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
495                 clear_nlink(inode);
496                 iput(inode);
497         }
498
499         if (status)
500                 mlog_errno(status);
501
502         return status;
503 }
504
505 static int __ocfs2_mknod_locked(struct inode *dir,
506                                 struct inode *inode,
507                                 dev_t dev,
508                                 struct buffer_head **new_fe_bh,
509                                 struct buffer_head *parent_fe_bh,
510                                 handle_t *handle,
511                                 struct ocfs2_alloc_context *inode_ac,
512                                 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
513 {
514         int status = 0;
515         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
516         struct ocfs2_dinode *fe = NULL;
517         struct ocfs2_extent_list *fel;
518         u16 feat;
519         struct ocfs2_inode_info *oi = OCFS2_I(inode);
520         struct timespec64 ts;
521
522         *new_fe_bh = NULL;
523
524         /* populate as many fields early on as possible - many of
525          * these are used by the support functions here and in
526          * callers. */
527         inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
528         oi->ip_blkno = fe_blkno;
529         spin_lock(&osb->osb_lock);
530         inode->i_generation = osb->s_next_generation++;
531         spin_unlock(&osb->osb_lock);
532
533         *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
534         if (!*new_fe_bh) {
535                 status = -ENOMEM;
536                 mlog_errno(status);
537                 goto leave;
538         }
539         ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
540
541         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
542                                          *new_fe_bh,
543                                          OCFS2_JOURNAL_ACCESS_CREATE);
544         if (status < 0) {
545                 mlog_errno(status);
546                 goto leave;
547         }
548
549         fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
550         memset(fe, 0, osb->sb->s_blocksize);
551
552         fe->i_generation = cpu_to_le32(inode->i_generation);
553         fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
554         fe->i_blkno = cpu_to_le64(fe_blkno);
555         fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
556         fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
557         fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
558         fe->i_uid = cpu_to_le32(i_uid_read(inode));
559         fe->i_gid = cpu_to_le32(i_gid_read(inode));
560         fe->i_mode = cpu_to_le16(inode->i_mode);
561         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
562                 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
563
564         ocfs2_set_links_count(fe, inode->i_nlink);
565
566         fe->i_last_eb_blk = 0;
567         strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
568         fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
569         ktime_get_real_ts64(&ts);
570         fe->i_atime = fe->i_ctime = fe->i_mtime =
571                 cpu_to_le64(ts.tv_sec);
572         fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
573                 cpu_to_le32(ts.tv_nsec);
574         fe->i_dtime = 0;
575
576         /*
577          * If supported, directories start with inline data. If inline
578          * isn't supported, but indexing is, we start them as indexed.
579          */
580         feat = le16_to_cpu(fe->i_dyn_features);
581         if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
582                 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
583
584                 fe->id2.i_data.id_count = cpu_to_le16(
585                                 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
586         } else {
587                 fel = &fe->id2.i_list;
588                 fel->l_tree_depth = 0;
589                 fel->l_next_free_rec = 0;
590                 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
591         }
592
593         ocfs2_journal_dirty(handle, *new_fe_bh);
594
595         ocfs2_populate_inode(inode, fe, 1);
596         ocfs2_ci_set_new(osb, INODE_CACHE(inode));
597         if (!ocfs2_mount_local(osb)) {
598                 status = ocfs2_create_new_inode_locks(inode);
599                 if (status < 0)
600                         mlog_errno(status);
601         }
602
603         oi->i_sync_tid = handle->h_transaction->t_tid;
604         oi->i_datasync_tid = handle->h_transaction->t_tid;
605
606 leave:
607         if (status < 0) {
608                 if (*new_fe_bh) {
609                         brelse(*new_fe_bh);
610                         *new_fe_bh = NULL;
611                 }
612         }
613
614         if (status)
615                 mlog_errno(status);
616         return status;
617 }
618
619 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
620                               struct inode *dir,
621                               struct inode *inode,
622                               dev_t dev,
623                               struct buffer_head **new_fe_bh,
624                               struct buffer_head *parent_fe_bh,
625                               handle_t *handle,
626                               struct ocfs2_alloc_context *inode_ac)
627 {
628         int status = 0;
629         u64 suballoc_loc, fe_blkno = 0;
630         u16 suballoc_bit;
631
632         *new_fe_bh = NULL;
633
634         status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
635                                        inode_ac, &suballoc_loc,
636                                        &suballoc_bit, &fe_blkno);
637         if (status < 0) {
638                 mlog_errno(status);
639                 return status;
640         }
641
642         status = __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
643                                     parent_fe_bh, handle, inode_ac,
644                                     fe_blkno, suballoc_loc, suballoc_bit);
645         if (status < 0) {
646                 u64 bg_blkno = ocfs2_which_suballoc_group(fe_blkno, suballoc_bit);
647                 int tmp = ocfs2_free_suballoc_bits(handle, inode_ac->ac_inode,
648                                 inode_ac->ac_bh, suballoc_bit, bg_blkno, 1);
649                 if (tmp)
650                         mlog_errno(tmp);
651         }
652
653         return status;
654 }
655
656 static int ocfs2_mkdir(struct inode *dir,
657                        struct dentry *dentry,
658                        umode_t mode)
659 {
660         int ret;
661
662         trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
663                           OCFS2_I(dir)->ip_blkno, mode);
664         ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
665         if (ret)
666                 mlog_errno(ret);
667
668         return ret;
669 }
670
671 static int ocfs2_create(struct inode *dir,
672                         struct dentry *dentry,
673                         umode_t mode,
674                         bool excl)
675 {
676         int ret;
677
678         trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
679                            (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
680         ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
681         if (ret)
682                 mlog_errno(ret);
683
684         return ret;
685 }
686
687 static int ocfs2_link(struct dentry *old_dentry,
688                       struct inode *dir,
689                       struct dentry *dentry)
690 {
691         handle_t *handle;
692         struct inode *inode = d_inode(old_dentry);
693         struct inode *old_dir = d_inode(old_dentry->d_parent);
694         int err;
695         struct buffer_head *fe_bh = NULL;
696         struct buffer_head *old_dir_bh = NULL;
697         struct buffer_head *parent_fe_bh = NULL;
698         struct ocfs2_dinode *fe = NULL;
699         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
700         struct ocfs2_dir_lookup_result lookup = { NULL, };
701         sigset_t oldset;
702         u64 old_de_ino;
703
704         trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
705                          old_dentry->d_name.len, old_dentry->d_name.name,
706                          dentry->d_name.len, dentry->d_name.name);
707
708         if (S_ISDIR(inode->i_mode))
709                 return -EPERM;
710
711         err = dquot_initialize(dir);
712         if (err) {
713                 mlog_errno(err);
714                 return err;
715         }
716
717         err = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
718                         &parent_fe_bh, dir, 0);
719         if (err < 0) {
720                 if (err != -ENOENT)
721                         mlog_errno(err);
722                 return err;
723         }
724
725         /* make sure both dirs have bhs
726          * get an extra ref on old_dir_bh if old==new */
727         if (!parent_fe_bh) {
728                 if (old_dir_bh) {
729                         parent_fe_bh = old_dir_bh;
730                         get_bh(parent_fe_bh);
731                 } else {
732                         mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str);
733                         err = -EIO;
734                         goto out;
735                 }
736         }
737
738         if (!dir->i_nlink) {
739                 err = -ENOENT;
740                 goto out;
741         }
742
743         err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
744                         old_dentry->d_name.len, &old_de_ino);
745         if (err) {
746                 err = -ENOENT;
747                 goto out;
748         }
749
750         /*
751          * Check whether another node removed the source inode while we
752          * were in the vfs.
753          */
754         if (old_de_ino != OCFS2_I(inode)->ip_blkno) {
755                 err = -ENOENT;
756                 goto out;
757         }
758
759         err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
760                                         dentry->d_name.len);
761         if (err)
762                 goto out;
763
764         err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
765                                            dentry->d_name.name,
766                                            dentry->d_name.len, &lookup);
767         if (err < 0) {
768                 mlog_errno(err);
769                 goto out;
770         }
771
772         err = ocfs2_inode_lock(inode, &fe_bh, 1);
773         if (err < 0) {
774                 if (err != -ENOENT)
775                         mlog_errno(err);
776                 goto out;
777         }
778
779         fe = (struct ocfs2_dinode *) fe_bh->b_data;
780         if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
781                 err = -EMLINK;
782                 goto out_unlock_inode;
783         }
784
785         handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
786         if (IS_ERR(handle)) {
787                 err = PTR_ERR(handle);
788                 handle = NULL;
789                 mlog_errno(err);
790                 goto out_unlock_inode;
791         }
792
793         /* Starting to change things, restart is no longer possible. */
794         ocfs2_block_signals(&oldset);
795
796         err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
797                                       OCFS2_JOURNAL_ACCESS_WRITE);
798         if (err < 0) {
799                 mlog_errno(err);
800                 goto out_commit;
801         }
802
803         inc_nlink(inode);
804         inode->i_ctime = current_time(inode);
805         ocfs2_set_links_count(fe, inode->i_nlink);
806         fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
807         fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
808         ocfs2_journal_dirty(handle, fe_bh);
809
810         err = ocfs2_add_entry(handle, dentry, inode,
811                               OCFS2_I(inode)->ip_blkno,
812                               parent_fe_bh, &lookup);
813         if (err) {
814                 ocfs2_add_links_count(fe, -1);
815                 drop_nlink(inode);
816                 mlog_errno(err);
817                 goto out_commit;
818         }
819
820         err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
821         if (err) {
822                 mlog_errno(err);
823                 goto out_commit;
824         }
825
826         ihold(inode);
827         d_instantiate(dentry, inode);
828
829 out_commit:
830         ocfs2_commit_trans(osb, handle);
831         ocfs2_unblock_signals(&oldset);
832 out_unlock_inode:
833         ocfs2_inode_unlock(inode, 1);
834
835 out:
836         ocfs2_double_unlock(old_dir, dir);
837
838         brelse(fe_bh);
839         brelse(parent_fe_bh);
840         brelse(old_dir_bh);
841
842         ocfs2_free_dir_lookup_result(&lookup);
843
844         if (err)
845                 mlog_errno(err);
846
847         return err;
848 }
849
850 /*
851  * Takes and drops an exclusive lock on the given dentry. This will
852  * force other nodes to drop it.
853  */
854 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
855 {
856         int ret;
857
858         ret = ocfs2_dentry_lock(dentry, 1);
859         if (ret)
860                 mlog_errno(ret);
861         else
862                 ocfs2_dentry_unlock(dentry, 1);
863
864         return ret;
865 }
866
867 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
868 {
869         if (S_ISDIR(inode->i_mode)) {
870                 if (inode->i_nlink == 2)
871                         return 1;
872                 return 0;
873         }
874
875         if (inode->i_nlink == 1)
876                 return 1;
877         return 0;
878 }
879
880 static int ocfs2_unlink(struct inode *dir,
881                         struct dentry *dentry)
882 {
883         int status;
884         int child_locked = 0;
885         bool is_unlinkable = false;
886         struct inode *inode = d_inode(dentry);
887         struct inode *orphan_dir = NULL;
888         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
889         u64 blkno;
890         struct ocfs2_dinode *fe = NULL;
891         struct buffer_head *fe_bh = NULL;
892         struct buffer_head *parent_node_bh = NULL;
893         handle_t *handle = NULL;
894         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
895         struct ocfs2_dir_lookup_result lookup = { NULL, };
896         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
897
898         trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
899                            dentry->d_name.name,
900                            (unsigned long long)OCFS2_I(dir)->ip_blkno,
901                            (unsigned long long)OCFS2_I(inode)->ip_blkno);
902
903         status = dquot_initialize(dir);
904         if (status) {
905                 mlog_errno(status);
906                 return status;
907         }
908
909         BUG_ON(d_inode(dentry->d_parent) != dir);
910
911         if (inode == osb->root_inode)
912                 return -EPERM;
913
914         status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
915                                          OI_LS_PARENT);
916         if (status < 0) {
917                 if (status != -ENOENT)
918                         mlog_errno(status);
919                 return status;
920         }
921
922         status = ocfs2_find_files_on_disk(dentry->d_name.name,
923                                           dentry->d_name.len, &blkno, dir,
924                                           &lookup);
925         if (status < 0) {
926                 if (status != -ENOENT)
927                         mlog_errno(status);
928                 goto leave;
929         }
930
931         if (OCFS2_I(inode)->ip_blkno != blkno) {
932                 status = -ENOENT;
933
934                 trace_ocfs2_unlink_noent(
935                                 (unsigned long long)OCFS2_I(inode)->ip_blkno,
936                                 (unsigned long long)blkno,
937                                 OCFS2_I(inode)->ip_flags);
938                 goto leave;
939         }
940
941         status = ocfs2_inode_lock(inode, &fe_bh, 1);
942         if (status < 0) {
943                 if (status != -ENOENT)
944                         mlog_errno(status);
945                 goto leave;
946         }
947         child_locked = 1;
948
949         if (S_ISDIR(inode->i_mode)) {
950                 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
951                         status = -ENOTEMPTY;
952                         goto leave;
953                 }
954         }
955
956         status = ocfs2_remote_dentry_delete(dentry);
957         if (status < 0) {
958                 /* This remote delete should succeed under all normal
959                  * circumstances. */
960                 mlog_errno(status);
961                 goto leave;
962         }
963
964         if (ocfs2_inode_is_unlinkable(inode)) {
965                 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
966                                                   OCFS2_I(inode)->ip_blkno,
967                                                   orphan_name, &orphan_insert,
968                                                   false);
969                 if (status < 0) {
970                         mlog_errno(status);
971                         goto leave;
972                 }
973                 is_unlinkable = true;
974         }
975
976         handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
977         if (IS_ERR(handle)) {
978                 status = PTR_ERR(handle);
979                 handle = NULL;
980                 mlog_errno(status);
981                 goto leave;
982         }
983
984         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
985                                          OCFS2_JOURNAL_ACCESS_WRITE);
986         if (status < 0) {
987                 mlog_errno(status);
988                 goto leave;
989         }
990
991         fe = (struct ocfs2_dinode *) fe_bh->b_data;
992
993         /* delete the name from the parent dir */
994         status = ocfs2_delete_entry(handle, dir, &lookup);
995         if (status < 0) {
996                 mlog_errno(status);
997                 goto leave;
998         }
999
1000         if (S_ISDIR(inode->i_mode))
1001                 drop_nlink(inode);
1002         drop_nlink(inode);
1003         ocfs2_set_links_count(fe, inode->i_nlink);
1004         ocfs2_journal_dirty(handle, fe_bh);
1005
1006         dir->i_ctime = dir->i_mtime = current_time(dir);
1007         if (S_ISDIR(inode->i_mode))
1008                 drop_nlink(dir);
1009
1010         status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
1011         if (status < 0) {
1012                 mlog_errno(status);
1013                 if (S_ISDIR(inode->i_mode))
1014                         inc_nlink(dir);
1015                 goto leave;
1016         }
1017
1018         if (is_unlinkable) {
1019                 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
1020                                 orphan_name, &orphan_insert, orphan_dir, false);
1021                 if (status < 0)
1022                         mlog_errno(status);
1023         }
1024
1025 leave:
1026         if (handle)
1027                 ocfs2_commit_trans(osb, handle);
1028
1029         if (orphan_dir) {
1030                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1031                 ocfs2_inode_unlock(orphan_dir, 1);
1032                 inode_unlock(orphan_dir);
1033                 iput(orphan_dir);
1034         }
1035
1036         if (child_locked)
1037                 ocfs2_inode_unlock(inode, 1);
1038
1039         ocfs2_inode_unlock(dir, 1);
1040
1041         brelse(fe_bh);
1042         brelse(parent_node_bh);
1043
1044         ocfs2_free_dir_lookup_result(&orphan_insert);
1045         ocfs2_free_dir_lookup_result(&lookup);
1046
1047         if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
1048                 mlog_errno(status);
1049
1050         return status;
1051 }
1052
1053 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb,
1054                 u64 src_inode_no, u64 dest_inode_no)
1055 {
1056         int ret = 0, i = 0;
1057         u64 parent_inode_no = 0;
1058         u64 child_inode_no = src_inode_no;
1059         struct inode *child_inode;
1060
1061 #define MAX_LOOKUP_TIMES 32
1062         while (1) {
1063                 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0);
1064                 if (IS_ERR(child_inode)) {
1065                         ret = PTR_ERR(child_inode);
1066                         break;
1067                 }
1068
1069                 ret = ocfs2_inode_lock(child_inode, NULL, 0);
1070                 if (ret < 0) {
1071                         iput(child_inode);
1072                         if (ret != -ENOENT)
1073                                 mlog_errno(ret);
1074                         break;
1075                 }
1076
1077                 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2,
1078                                 &parent_inode_no);
1079                 ocfs2_inode_unlock(child_inode, 0);
1080                 iput(child_inode);
1081                 if (ret < 0) {
1082                         ret = -ENOENT;
1083                         break;
1084                 }
1085
1086                 if (parent_inode_no == dest_inode_no) {
1087                         ret = 1;
1088                         break;
1089                 }
1090
1091                 if (parent_inode_no == osb->root_inode->i_ino) {
1092                         ret = 0;
1093                         break;
1094                 }
1095
1096                 child_inode_no = parent_inode_no;
1097
1098                 if (++i >= MAX_LOOKUP_TIMES) {
1099                         mlog(ML_NOTICE, "max lookup times reached, filesystem "
1100                                         "may have nested directories, "
1101                                         "src inode: %llu, dest inode: %llu.\n",
1102                                         (unsigned long long)src_inode_no,
1103                                         (unsigned long long)dest_inode_no);
1104                         ret = 0;
1105                         break;
1106                 }
1107         }
1108
1109         return ret;
1110 }
1111
1112 /*
1113  * The only place this should be used is rename and link!
1114  * if they have the same id, then the 1st one is the only one locked.
1115  */
1116 static int ocfs2_double_lock(struct ocfs2_super *osb,
1117                              struct buffer_head **bh1,
1118                              struct inode *inode1,
1119                              struct buffer_head **bh2,
1120                              struct inode *inode2,
1121                              int rename)
1122 {
1123         int status;
1124         int inode1_is_ancestor, inode2_is_ancestor;
1125         struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
1126         struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
1127
1128         trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
1129                                 (unsigned long long)oi2->ip_blkno);
1130
1131         if (*bh1)
1132                 *bh1 = NULL;
1133         if (*bh2)
1134                 *bh2 = NULL;
1135
1136         /* we always want to lock the one with the lower lockid first.
1137          * and if they are nested, we lock ancestor first */
1138         if (oi1->ip_blkno != oi2->ip_blkno) {
1139                 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno,
1140                                 oi1->ip_blkno);
1141                 if (inode1_is_ancestor < 0) {
1142                         status = inode1_is_ancestor;
1143                         goto bail;
1144                 }
1145
1146                 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno,
1147                                 oi2->ip_blkno);
1148                 if (inode2_is_ancestor < 0) {
1149                         status = inode2_is_ancestor;
1150                         goto bail;
1151                 }
1152
1153                 if ((inode1_is_ancestor == 1) ||
1154                                 (oi1->ip_blkno < oi2->ip_blkno &&
1155                                 inode2_is_ancestor == 0)) {
1156                         /* switch id1 and id2 around */
1157                         swap(bh2, bh1);
1158                         swap(inode2, inode1);
1159                 }
1160                 /* lock id2 */
1161                 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1162                                 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT);
1163                 if (status < 0) {
1164                         if (status != -ENOENT)
1165                                 mlog_errno(status);
1166                         goto bail;
1167                 }
1168         }
1169
1170         /* lock id1 */
1171         status = ocfs2_inode_lock_nested(inode1, bh1, 1,
1172                         rename == 1 ?  OI_LS_RENAME2 : OI_LS_PARENT);
1173         if (status < 0) {
1174                 /*
1175                  * An error return must mean that no cluster locks
1176                  * were held on function exit.
1177                  */
1178                 if (oi1->ip_blkno != oi2->ip_blkno) {
1179                         ocfs2_inode_unlock(inode2, 1);
1180                         brelse(*bh2);
1181                         *bh2 = NULL;
1182                 }
1183
1184                 if (status != -ENOENT)
1185                         mlog_errno(status);
1186         }
1187
1188         trace_ocfs2_double_lock_end(
1189                         (unsigned long long)oi1->ip_blkno,
1190                         (unsigned long long)oi2->ip_blkno);
1191
1192 bail:
1193         if (status)
1194                 mlog_errno(status);
1195         return status;
1196 }
1197
1198 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1199 {
1200         ocfs2_inode_unlock(inode1, 1);
1201
1202         if (inode1 != inode2)
1203                 ocfs2_inode_unlock(inode2, 1);
1204 }
1205
1206 static int ocfs2_rename(struct inode *old_dir,
1207                         struct dentry *old_dentry,
1208                         struct inode *new_dir,
1209                         struct dentry *new_dentry,
1210                         unsigned int flags)
1211 {
1212         int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1213         int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1214         struct inode *old_inode = d_inode(old_dentry);
1215         struct inode *new_inode = d_inode(new_dentry);
1216         struct inode *orphan_dir = NULL;
1217         struct ocfs2_dinode *newfe = NULL;
1218         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1219         struct buffer_head *newfe_bh = NULL;
1220         struct buffer_head *old_inode_bh = NULL;
1221         struct ocfs2_super *osb = NULL;
1222         u64 newfe_blkno, old_de_ino;
1223         handle_t *handle = NULL;
1224         struct buffer_head *old_dir_bh = NULL;
1225         struct buffer_head *new_dir_bh = NULL;
1226         u32 old_dir_nlink = old_dir->i_nlink;
1227         struct ocfs2_dinode *old_di;
1228         struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1229         struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1230         struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1231         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1232         struct ocfs2_dir_lookup_result target_insert = { NULL, };
1233         bool should_add_orphan = false;
1234
1235         if (flags)
1236                 return -EINVAL;
1237
1238         /* At some point it might be nice to break this function up a
1239          * bit. */
1240
1241         trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1242                            old_dentry->d_name.len, old_dentry->d_name.name,
1243                            new_dentry->d_name.len, new_dentry->d_name.name);
1244
1245         status = dquot_initialize(old_dir);
1246         if (status) {
1247                 mlog_errno(status);
1248                 goto bail;
1249         }
1250         status = dquot_initialize(new_dir);
1251         if (status) {
1252                 mlog_errno(status);
1253                 goto bail;
1254         }
1255
1256         osb = OCFS2_SB(old_dir->i_sb);
1257
1258         if (new_inode) {
1259                 if (!igrab(new_inode))
1260                         BUG();
1261         }
1262
1263         /* Assume a directory hierarchy thusly:
1264          * a/b/c
1265          * a/d
1266          * a,b,c, and d are all directories.
1267          *
1268          * from cwd of 'a' on both nodes:
1269          * node1: mv b/c d
1270          * node2: mv d   b/c
1271          *
1272          * And that's why, just like the VFS, we need a file system
1273          * rename lock. */
1274         if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1275                 status = ocfs2_rename_lock(osb);
1276                 if (status < 0) {
1277                         mlog_errno(status);
1278                         goto bail;
1279                 }
1280                 rename_lock = 1;
1281
1282                 /* here we cannot guarantee the inodes haven't just been
1283                  * changed, so check if they are nested again */
1284                 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino,
1285                                 old_inode->i_ino);
1286                 if (status < 0) {
1287                         mlog_errno(status);
1288                         goto bail;
1289                 } else if (status == 1) {
1290                         status = -EPERM;
1291                         trace_ocfs2_rename_not_permitted(
1292                                         (unsigned long long)old_inode->i_ino,
1293                                         (unsigned long long)new_dir->i_ino);
1294                         goto bail;
1295                 }
1296         }
1297
1298         /* if old and new are the same, this'll just do one lock. */
1299         status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1300                                    &new_dir_bh, new_dir, 1);
1301         if (status < 0) {
1302                 mlog_errno(status);
1303                 goto bail;
1304         }
1305         parents_locked = 1;
1306
1307         if (!new_dir->i_nlink) {
1308                 status = -EACCES;
1309                 goto bail;
1310         }
1311
1312         /* make sure both dirs have bhs
1313          * get an extra ref on old_dir_bh if old==new */
1314         if (!new_dir_bh) {
1315                 if (old_dir_bh) {
1316                         new_dir_bh = old_dir_bh;
1317                         get_bh(new_dir_bh);
1318                 } else {
1319                         mlog(ML_ERROR, "no old_dir_bh!\n");
1320                         status = -EIO;
1321                         goto bail;
1322                 }
1323         }
1324
1325         /*
1326          * Aside from allowing a meta data update, the locking here
1327          * also ensures that the downconvert thread on other nodes
1328          * won't have to concurrently downconvert the inode and the
1329          * dentry locks.
1330          */
1331         status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1332                                          OI_LS_PARENT);
1333         if (status < 0) {
1334                 if (status != -ENOENT)
1335                         mlog_errno(status);
1336                 goto bail;
1337         }
1338         old_child_locked = 1;
1339
1340         status = ocfs2_remote_dentry_delete(old_dentry);
1341         if (status < 0) {
1342                 mlog_errno(status);
1343                 goto bail;
1344         }
1345
1346         if (S_ISDIR(old_inode->i_mode)) {
1347                 u64 old_inode_parent;
1348
1349                 update_dot_dot = 1;
1350                 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1351                                                   old_inode,
1352                                                   &old_inode_dot_dot_res);
1353                 if (status) {
1354                         status = -EIO;
1355                         goto bail;
1356                 }
1357
1358                 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1359                         status = -EIO;
1360                         goto bail;
1361                 }
1362
1363                 if (!new_inode && new_dir != old_dir &&
1364                     new_dir->i_nlink >= ocfs2_link_max(osb)) {
1365                         status = -EMLINK;
1366                         goto bail;
1367                 }
1368         }
1369
1370         status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1371                                             old_dentry->d_name.len,
1372                                             &old_de_ino);
1373         if (status) {
1374                 status = -ENOENT;
1375                 goto bail;
1376         }
1377
1378         /*
1379          *  Check for inode number is _not_ due to possible IO errors.
1380          *  We might rmdir the source, keep it as pwd of some process
1381          *  and merrily kill the link to whatever was created under the
1382          *  same name. Goodbye sticky bit ;-<
1383          */
1384         if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1385                 status = -ENOENT;
1386                 goto bail;
1387         }
1388
1389         /* check if the target already exists (in which case we need
1390          * to delete it */
1391         status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1392                                           new_dentry->d_name.len,
1393                                           &newfe_blkno, new_dir,
1394                                           &target_lookup_res);
1395         /* The only error we allow here is -ENOENT because the new
1396          * file not existing is perfectly valid. */
1397         if ((status < 0) && (status != -ENOENT)) {
1398                 /* If we cannot find the file specified we should just */
1399                 /* return the error... */
1400                 mlog_errno(status);
1401                 goto bail;
1402         }
1403         if (status == 0)
1404                 target_exists = 1;
1405
1406         if (!target_exists && new_inode) {
1407                 /*
1408                  * Target was unlinked by another node while we were
1409                  * waiting to get to ocfs2_rename(). There isn't
1410                  * anything we can do here to help the situation, so
1411                  * bubble up the appropriate error.
1412                  */
1413                 status = -ENOENT;
1414                 goto bail;
1415         }
1416
1417         /* In case we need to overwrite an existing file, we blow it
1418          * away first */
1419         if (target_exists) {
1420                 /* VFS didn't think there existed an inode here, but
1421                  * someone else in the cluster must have raced our
1422                  * rename to create one. Today we error cleanly, in
1423                  * the future we should consider calling iget to build
1424                  * a new struct inode for this entry. */
1425                 if (!new_inode) {
1426                         status = -EACCES;
1427
1428                         trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1429                                                 new_dentry->d_name.name);
1430                         goto bail;
1431                 }
1432
1433                 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1434                         status = -EACCES;
1435
1436                         trace_ocfs2_rename_disagree(
1437                              (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1438                              (unsigned long long)newfe_blkno,
1439                              OCFS2_I(new_inode)->ip_flags);
1440                         goto bail;
1441                 }
1442
1443                 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1444                 if (status < 0) {
1445                         if (status != -ENOENT)
1446                                 mlog_errno(status);
1447                         goto bail;
1448                 }
1449                 new_child_locked = 1;
1450
1451                 status = ocfs2_remote_dentry_delete(new_dentry);
1452                 if (status < 0) {
1453                         mlog_errno(status);
1454                         goto bail;
1455                 }
1456
1457                 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1458
1459                 trace_ocfs2_rename_over_existing(
1460                      (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1461                      (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1462
1463                 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1464                         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1465                                                 OCFS2_I(new_inode)->ip_blkno,
1466                                                 orphan_name, &orphan_insert,
1467                                                 false);
1468                         if (status < 0) {
1469                                 mlog_errno(status);
1470                                 goto bail;
1471                         }
1472                         should_add_orphan = true;
1473                 }
1474         } else {
1475                 BUG_ON(d_inode(new_dentry->d_parent) != new_dir);
1476
1477                 status = ocfs2_check_dir_for_entry(new_dir,
1478                                                    new_dentry->d_name.name,
1479                                                    new_dentry->d_name.len);
1480                 if (status)
1481                         goto bail;
1482
1483                 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1484                                                       new_dentry->d_name.name,
1485                                                       new_dentry->d_name.len,
1486                                                       &target_insert);
1487                 if (status < 0) {
1488                         mlog_errno(status);
1489                         goto bail;
1490                 }
1491         }
1492
1493         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1494         if (IS_ERR(handle)) {
1495                 status = PTR_ERR(handle);
1496                 handle = NULL;
1497                 mlog_errno(status);
1498                 goto bail;
1499         }
1500
1501         if (target_exists) {
1502                 if (S_ISDIR(new_inode->i_mode)) {
1503                         if (new_inode->i_nlink != 2 ||
1504                             !ocfs2_empty_dir(new_inode)) {
1505                                 status = -ENOTEMPTY;
1506                                 goto bail;
1507                         }
1508                 }
1509                 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1510                                                  newfe_bh,
1511                                                  OCFS2_JOURNAL_ACCESS_WRITE);
1512                 if (status < 0) {
1513                         mlog_errno(status);
1514                         goto bail;
1515                 }
1516
1517                 /* change the dirent to point to the correct inode */
1518                 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1519                                             old_inode);
1520                 if (status < 0) {
1521                         mlog_errno(status);
1522                         goto bail;
1523                 }
1524                 inode_inc_iversion(new_dir);
1525
1526                 if (S_ISDIR(new_inode->i_mode))
1527                         ocfs2_set_links_count(newfe, 0);
1528                 else
1529                         ocfs2_add_links_count(newfe, -1);
1530                 ocfs2_journal_dirty(handle, newfe_bh);
1531                 if (should_add_orphan) {
1532                         status = ocfs2_orphan_add(osb, handle, new_inode,
1533                                         newfe_bh, orphan_name,
1534                                         &orphan_insert, orphan_dir, false);
1535                         if (status < 0) {
1536                                 mlog_errno(status);
1537                                 goto bail;
1538                         }
1539                 }
1540         } else {
1541                 /* if the name was not found in new_dir, add it now */
1542                 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1543                                          OCFS2_I(old_inode)->ip_blkno,
1544                                          new_dir_bh, &target_insert);
1545         }
1546
1547         old_inode->i_ctime = current_time(old_inode);
1548         mark_inode_dirty(old_inode);
1549
1550         status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1551                                          old_inode_bh,
1552                                          OCFS2_JOURNAL_ACCESS_WRITE);
1553         if (status >= 0) {
1554                 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1555
1556                 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1557                 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1558                 ocfs2_journal_dirty(handle, old_inode_bh);
1559         } else
1560                 mlog_errno(status);
1561
1562         /*
1563          * Now that the name has been added to new_dir, remove the old name.
1564          *
1565          * We don't keep any directory entry context around until now
1566          * because the insert might have changed the type of directory
1567          * we're dealing with.
1568          */
1569         status = ocfs2_find_entry(old_dentry->d_name.name,
1570                                   old_dentry->d_name.len, old_dir,
1571                                   &old_entry_lookup);
1572         if (status) {
1573                 if (!is_journal_aborted(osb->journal->j_journal)) {
1574                         ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1575                                         "is not deleted.",
1576                                         new_dentry->d_name.len, new_dentry->d_name.name,
1577                                         old_dentry->d_name.len, old_dentry->d_name.name);
1578                 }
1579                 goto bail;
1580         }
1581
1582         status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1583         if (status < 0) {
1584                 mlog_errno(status);
1585                 if (!is_journal_aborted(osb->journal->j_journal)) {
1586                         ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1587                                         "is not deleted.",
1588                                         new_dentry->d_name.len, new_dentry->d_name.name,
1589                                         old_dentry->d_name.len, old_dentry->d_name.name);
1590                 }
1591                 goto bail;
1592         }
1593
1594         if (new_inode) {
1595                 drop_nlink(new_inode);
1596                 new_inode->i_ctime = current_time(new_inode);
1597         }
1598         old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir);
1599
1600         if (update_dot_dot) {
1601                 status = ocfs2_update_entry(old_inode, handle,
1602                                             &old_inode_dot_dot_res, new_dir);
1603                 drop_nlink(old_dir);
1604                 if (new_inode) {
1605                         drop_nlink(new_inode);
1606                 } else {
1607                         inc_nlink(new_dir);
1608                         mark_inode_dirty(new_dir);
1609                 }
1610         }
1611         mark_inode_dirty(old_dir);
1612         ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1613         if (new_inode) {
1614                 mark_inode_dirty(new_inode);
1615                 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1616         }
1617
1618         if (old_dir != new_dir) {
1619                 /* Keep the same times on both directories.*/
1620                 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1621
1622                 /*
1623                  * This will also pick up the i_nlink change from the
1624                  * block above.
1625                  */
1626                 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1627         }
1628
1629         if (old_dir_nlink != old_dir->i_nlink) {
1630                 if (!old_dir_bh) {
1631                         mlog(ML_ERROR, "need to change nlink for old dir "
1632                              "%llu from %d to %d but bh is NULL!\n",
1633                              (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1634                              (int)old_dir_nlink, old_dir->i_nlink);
1635                 } else {
1636                         struct ocfs2_dinode *fe;
1637                         status = ocfs2_journal_access_di(handle,
1638                                                          INODE_CACHE(old_dir),
1639                                                          old_dir_bh,
1640                                                          OCFS2_JOURNAL_ACCESS_WRITE);
1641                         fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1642                         ocfs2_set_links_count(fe, old_dir->i_nlink);
1643                         ocfs2_journal_dirty(handle, old_dir_bh);
1644                 }
1645         }
1646         ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1647         status = 0;
1648 bail:
1649         if (handle)
1650                 ocfs2_commit_trans(osb, handle);
1651
1652         if (orphan_dir) {
1653                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1654                 ocfs2_inode_unlock(orphan_dir, 1);
1655                 inode_unlock(orphan_dir);
1656                 iput(orphan_dir);
1657         }
1658
1659         if (new_child_locked)
1660                 ocfs2_inode_unlock(new_inode, 1);
1661
1662         if (old_child_locked)
1663                 ocfs2_inode_unlock(old_inode, 1);
1664
1665         if (parents_locked)
1666                 ocfs2_double_unlock(old_dir, new_dir);
1667
1668         if (rename_lock)
1669                 ocfs2_rename_unlock(osb);
1670
1671         if (new_inode)
1672                 sync_mapping_buffers(old_inode->i_mapping);
1673
1674         iput(new_inode);
1675
1676         ocfs2_free_dir_lookup_result(&target_lookup_res);
1677         ocfs2_free_dir_lookup_result(&old_entry_lookup);
1678         ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1679         ocfs2_free_dir_lookup_result(&orphan_insert);
1680         ocfs2_free_dir_lookup_result(&target_insert);
1681
1682         brelse(newfe_bh);
1683         brelse(old_inode_bh);
1684         brelse(old_dir_bh);
1685         brelse(new_dir_bh);
1686
1687         if (status)
1688                 mlog_errno(status);
1689
1690         return status;
1691 }
1692
1693 /*
1694  * we expect i_size = strlen(symname). Copy symname into the file
1695  * data, including the null terminator.
1696  */
1697 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1698                                      handle_t *handle,
1699                                      struct inode *inode,
1700                                      const char *symname)
1701 {
1702         struct buffer_head **bhs = NULL;
1703         const char *c;
1704         struct super_block *sb = osb->sb;
1705         u64 p_blkno, p_blocks;
1706         int virtual, blocks, status, i, bytes_left;
1707
1708         bytes_left = i_size_read(inode) + 1;
1709         /* we can't trust i_blocks because we're actually going to
1710          * write i_size + 1 bytes. */
1711         blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1712
1713         trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1714                                         i_size_read(inode), blocks);
1715
1716         /* Sanity check -- make sure we're going to fit. */
1717         if (bytes_left >
1718             ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1719                 status = -EIO;
1720                 mlog_errno(status);
1721                 goto bail;
1722         }
1723
1724         bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1725         if (!bhs) {
1726                 status = -ENOMEM;
1727                 mlog_errno(status);
1728                 goto bail;
1729         }
1730
1731         status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1732                                              NULL);
1733         if (status < 0) {
1734                 mlog_errno(status);
1735                 goto bail;
1736         }
1737
1738         /* links can never be larger than one cluster so we know this
1739          * is all going to be contiguous, but do a sanity check
1740          * anyway. */
1741         if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1742                 status = -EIO;
1743                 mlog_errno(status);
1744                 goto bail;
1745         }
1746
1747         virtual = 0;
1748         while(bytes_left > 0) {
1749                 c = &symname[virtual * sb->s_blocksize];
1750
1751                 bhs[virtual] = sb_getblk(sb, p_blkno);
1752                 if (!bhs[virtual]) {
1753                         status = -ENOMEM;
1754                         mlog_errno(status);
1755                         goto bail;
1756                 }
1757                 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1758                                               bhs[virtual]);
1759
1760                 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1761                                               bhs[virtual],
1762                                               OCFS2_JOURNAL_ACCESS_CREATE);
1763                 if (status < 0) {
1764                         mlog_errno(status);
1765                         goto bail;
1766                 }
1767
1768                 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1769
1770                 memcpy(bhs[virtual]->b_data, c,
1771                        (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1772                        bytes_left);
1773
1774                 ocfs2_journal_dirty(handle, bhs[virtual]);
1775
1776                 virtual++;
1777                 p_blkno++;
1778                 bytes_left -= sb->s_blocksize;
1779         }
1780
1781         status = 0;
1782 bail:
1783
1784         if (bhs) {
1785                 for(i = 0; i < blocks; i++)
1786                         brelse(bhs[i]);
1787                 kfree(bhs);
1788         }
1789
1790         if (status)
1791                 mlog_errno(status);
1792         return status;
1793 }
1794
1795 static int ocfs2_symlink(struct inode *dir,
1796                          struct dentry *dentry,
1797                          const char *symname)
1798 {
1799         int status, l, credits;
1800         u64 newsize;
1801         struct ocfs2_super *osb = NULL;
1802         struct inode *inode = NULL;
1803         struct super_block *sb;
1804         struct buffer_head *new_fe_bh = NULL;
1805         struct buffer_head *parent_fe_bh = NULL;
1806         struct ocfs2_dinode *fe = NULL;
1807         struct ocfs2_dinode *dirfe;
1808         handle_t *handle = NULL;
1809         struct ocfs2_alloc_context *inode_ac = NULL;
1810         struct ocfs2_alloc_context *data_ac = NULL;
1811         struct ocfs2_alloc_context *xattr_ac = NULL;
1812         int want_clusters = 0;
1813         int xattr_credits = 0;
1814         struct ocfs2_security_xattr_info si = {
1815                 .enable = 1,
1816         };
1817         int did_quota = 0, did_quota_inode = 0;
1818         struct ocfs2_dir_lookup_result lookup = { NULL, };
1819         sigset_t oldset;
1820         int did_block_signals = 0;
1821         struct ocfs2_dentry_lock *dl = NULL;
1822
1823         trace_ocfs2_symlink_begin(dir, dentry, symname,
1824                                   dentry->d_name.len, dentry->d_name.name);
1825
1826         status = dquot_initialize(dir);
1827         if (status) {
1828                 mlog_errno(status);
1829                 goto bail;
1830         }
1831
1832         sb = dir->i_sb;
1833         osb = OCFS2_SB(sb);
1834
1835         l = strlen(symname) + 1;
1836
1837         credits = ocfs2_calc_symlink_credits(sb);
1838
1839         /* lock the parent directory */
1840         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1841         if (status < 0) {
1842                 if (status != -ENOENT)
1843                         mlog_errno(status);
1844                 return status;
1845         }
1846
1847         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1848         if (!ocfs2_read_links_count(dirfe)) {
1849                 /* can't make a file in a deleted directory. */
1850                 status = -ENOENT;
1851                 goto bail;
1852         }
1853
1854         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1855                                            dentry->d_name.len);
1856         if (status)
1857                 goto bail;
1858
1859         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1860                                               dentry->d_name.name,
1861                                               dentry->d_name.len, &lookup);
1862         if (status < 0) {
1863                 mlog_errno(status);
1864                 goto bail;
1865         }
1866
1867         status = ocfs2_reserve_new_inode(osb, &inode_ac);
1868         if (status < 0) {
1869                 if (status != -ENOSPC)
1870                         mlog_errno(status);
1871                 goto bail;
1872         }
1873
1874         inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1875         if (IS_ERR(inode)) {
1876                 status = PTR_ERR(inode);
1877                 inode = NULL;
1878                 mlog_errno(status);
1879                 goto bail;
1880         }
1881
1882         /* get security xattr */
1883         status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1884         if (status) {
1885                 if (status == -EOPNOTSUPP)
1886                         si.enable = 0;
1887                 else {
1888                         mlog_errno(status);
1889                         goto bail;
1890                 }
1891         }
1892
1893         /* calculate meta data/clusters for setting security xattr */
1894         if (si.enable) {
1895                 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1896                                                   &xattr_credits, &xattr_ac);
1897                 if (status < 0) {
1898                         mlog_errno(status);
1899                         goto bail;
1900                 }
1901         }
1902
1903         /* don't reserve bitmap space for fast symlinks. */
1904         if (l > ocfs2_fast_symlink_chars(sb))
1905                 want_clusters += 1;
1906
1907         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1908         if (status < 0) {
1909                 if (status != -ENOSPC)
1910                         mlog_errno(status);
1911                 goto bail;
1912         }
1913
1914         handle = ocfs2_start_trans(osb, credits + xattr_credits);
1915         if (IS_ERR(handle)) {
1916                 status = PTR_ERR(handle);
1917                 handle = NULL;
1918                 mlog_errno(status);
1919                 goto bail;
1920         }
1921
1922         /* Starting to change things, restart is no longer possible. */
1923         ocfs2_block_signals(&oldset);
1924         did_block_signals = 1;
1925
1926         status = dquot_alloc_inode(inode);
1927         if (status)
1928                 goto bail;
1929         did_quota_inode = 1;
1930
1931         trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1932                                    dentry->d_name.name,
1933                                    (unsigned long long)OCFS2_I(dir)->ip_blkno,
1934                                    inode->i_mode);
1935
1936         status = ocfs2_mknod_locked(osb, dir, inode,
1937                                     0, &new_fe_bh, parent_fe_bh, handle,
1938                                     inode_ac);
1939         if (status < 0) {
1940                 mlog_errno(status);
1941                 goto bail;
1942         }
1943
1944         fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1945         inode->i_rdev = 0;
1946         newsize = l - 1;
1947         inode->i_op = &ocfs2_symlink_inode_operations;
1948         inode_nohighmem(inode);
1949         if (l > ocfs2_fast_symlink_chars(sb)) {
1950                 u32 offset = 0;
1951
1952                 status = dquot_alloc_space_nodirty(inode,
1953                     ocfs2_clusters_to_bytes(osb->sb, 1));
1954                 if (status)
1955                         goto bail;
1956                 did_quota = 1;
1957                 inode->i_mapping->a_ops = &ocfs2_aops;
1958                 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1959                                               new_fe_bh,
1960                                               handle, data_ac, NULL,
1961                                               NULL);
1962                 if (status < 0) {
1963                         if (status != -ENOSPC && status != -EINTR) {
1964                                 mlog(ML_ERROR,
1965                                      "Failed to extend file to %llu\n",
1966                                      (unsigned long long)newsize);
1967                                 mlog_errno(status);
1968                                 status = -ENOSPC;
1969                         }
1970                         goto bail;
1971                 }
1972                 i_size_write(inode, newsize);
1973                 inode->i_blocks = ocfs2_inode_sector_count(inode);
1974         } else {
1975                 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1976                 memcpy((char *) fe->id2.i_symlink, symname, l);
1977                 i_size_write(inode, newsize);
1978                 inode->i_blocks = 0;
1979         }
1980
1981         status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1982         if (status < 0) {
1983                 mlog_errno(status);
1984                 goto bail;
1985         }
1986
1987         if (!ocfs2_inode_is_fast_symlink(inode)) {
1988                 status = ocfs2_create_symlink_data(osb, handle, inode,
1989                                                    symname);
1990                 if (status < 0) {
1991                         mlog_errno(status);
1992                         goto bail;
1993                 }
1994         }
1995
1996         if (si.enable) {
1997                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1998                                                  xattr_ac, data_ac);
1999                 if (status < 0) {
2000                         mlog_errno(status);
2001                         goto bail;
2002                 }
2003         }
2004
2005         /*
2006          * Do this before adding the entry to the directory. We add
2007          * also set d_op after success so that ->d_iput() will cleanup
2008          * the dentry lock even if ocfs2_add_entry() fails below.
2009          */
2010         status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
2011         if (status) {
2012                 mlog_errno(status);
2013                 goto bail;
2014         }
2015
2016         dl = dentry->d_fsdata;
2017
2018         status = ocfs2_add_entry(handle, dentry, inode,
2019                                  le64_to_cpu(fe->i_blkno), parent_fe_bh,
2020                                  &lookup);
2021         if (status < 0) {
2022                 mlog_errno(status);
2023                 goto bail;
2024         }
2025
2026         insert_inode_hash(inode);
2027         d_instantiate(dentry, inode);
2028 bail:
2029         if (status < 0 && did_quota)
2030                 dquot_free_space_nodirty(inode,
2031                                         ocfs2_clusters_to_bytes(osb->sb, 1));
2032         if (status < 0 && did_quota_inode)
2033                 dquot_free_inode(inode);
2034         if (handle)
2035                 ocfs2_commit_trans(osb, handle);
2036
2037         ocfs2_inode_unlock(dir, 1);
2038         if (did_block_signals)
2039                 ocfs2_unblock_signals(&oldset);
2040
2041         brelse(new_fe_bh);
2042         brelse(parent_fe_bh);
2043         kfree(si.value);
2044         ocfs2_free_dir_lookup_result(&lookup);
2045         if (inode_ac)
2046                 ocfs2_free_alloc_context(inode_ac);
2047         if (data_ac)
2048                 ocfs2_free_alloc_context(data_ac);
2049         if (xattr_ac)
2050                 ocfs2_free_alloc_context(xattr_ac);
2051         if ((status < 0) && inode) {
2052                 if (dl)
2053                         ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2054
2055                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
2056                 clear_nlink(inode);
2057                 iput(inode);
2058         }
2059
2060         if (status)
2061                 mlog_errno(status);
2062
2063         return status;
2064 }
2065
2066 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2067 {
2068         int status, namelen;
2069
2070         namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2071                            (long long)blkno);
2072         if (namelen <= 0) {
2073                 if (namelen)
2074                         status = namelen;
2075                 else
2076                         status = -EINVAL;
2077                 mlog_errno(status);
2078                 goto bail;
2079         }
2080         if (namelen != OCFS2_ORPHAN_NAMELEN) {
2081                 status = -EINVAL;
2082                 mlog_errno(status);
2083                 goto bail;
2084         }
2085
2086         trace_ocfs2_blkno_stringify(blkno, name, namelen);
2087
2088         status = 0;
2089 bail:
2090         if (status < 0)
2091                 mlog_errno(status);
2092         return status;
2093 }
2094
2095 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2096                                         struct inode **ret_orphan_dir,
2097                                         struct buffer_head **ret_orphan_dir_bh)
2098 {
2099         struct inode *orphan_dir_inode;
2100         struct buffer_head *orphan_dir_bh = NULL;
2101         int ret = 0;
2102
2103         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2104                                                        ORPHAN_DIR_SYSTEM_INODE,
2105                                                        osb->slot_num);
2106         if (!orphan_dir_inode) {
2107                 ret = -ENOENT;
2108                 mlog_errno(ret);
2109                 return ret;
2110         }
2111
2112         inode_lock(orphan_dir_inode);
2113
2114         ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2115         if (ret < 0) {
2116                 inode_unlock(orphan_dir_inode);
2117                 iput(orphan_dir_inode);
2118
2119                 mlog_errno(ret);
2120                 return ret;
2121         }
2122
2123         *ret_orphan_dir = orphan_dir_inode;
2124         *ret_orphan_dir_bh = orphan_dir_bh;
2125
2126         return 0;
2127 }
2128
2129 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2130                                       struct buffer_head *orphan_dir_bh,
2131                                       u64 blkno,
2132                                       char *name,
2133                                       struct ocfs2_dir_lookup_result *lookup,
2134                                       bool dio)
2135 {
2136         int ret;
2137         struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2138         int namelen = dio ?
2139                         (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2140                         OCFS2_ORPHAN_NAMELEN;
2141
2142         if (dio) {
2143                 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2144                                 OCFS2_DIO_ORPHAN_PREFIX);
2145                 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2146                         ret = -EINVAL;
2147                         mlog_errno(ret);
2148                         return ret;
2149                 }
2150
2151                 ret = ocfs2_blkno_stringify(blkno,
2152                                 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2153         } else
2154                 ret = ocfs2_blkno_stringify(blkno, name);
2155         if (ret < 0) {
2156                 mlog_errno(ret);
2157                 return ret;
2158         }
2159
2160         ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2161                                            orphan_dir_bh, name,
2162                                            namelen, lookup);
2163         if (ret < 0) {
2164                 mlog_errno(ret);
2165                 return ret;
2166         }
2167
2168         return 0;
2169 }
2170
2171 /**
2172  * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2173  * insertion of an orphan.
2174  * @osb: ocfs2 file system
2175  * @ret_orphan_dir: Orphan dir inode - returned locked!
2176  * @blkno: Actual block number of the inode to be inserted into orphan dir.
2177  * @lookup: dir lookup result, to be passed back into functions like
2178  *          ocfs2_orphan_add
2179  *
2180  * Returns zero on success and the ret_orphan_dir, name and lookup
2181  * fields will be populated.
2182  *
2183  * Returns non-zero on failure. 
2184  */
2185 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2186                                     struct inode **ret_orphan_dir,
2187                                     u64 blkno,
2188                                     char *name,
2189                                     struct ocfs2_dir_lookup_result *lookup,
2190                                     bool dio)
2191 {
2192         struct inode *orphan_dir_inode = NULL;
2193         struct buffer_head *orphan_dir_bh = NULL;
2194         int ret = 0;
2195
2196         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2197                                            &orphan_dir_bh);
2198         if (ret < 0) {
2199                 mlog_errno(ret);
2200                 return ret;
2201         }
2202
2203         ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2204                                          blkno, name, lookup, dio);
2205         if (ret < 0) {
2206                 mlog_errno(ret);
2207                 goto out;
2208         }
2209
2210         *ret_orphan_dir = orphan_dir_inode;
2211
2212 out:
2213         brelse(orphan_dir_bh);
2214
2215         if (ret) {
2216                 ocfs2_inode_unlock(orphan_dir_inode, 1);
2217                 inode_unlock(orphan_dir_inode);
2218                 iput(orphan_dir_inode);
2219         }
2220
2221         if (ret)
2222                 mlog_errno(ret);
2223         return ret;
2224 }
2225
2226 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2227                             handle_t *handle,
2228                             struct inode *inode,
2229                             struct buffer_head *fe_bh,
2230                             char *name,
2231                             struct ocfs2_dir_lookup_result *lookup,
2232                             struct inode *orphan_dir_inode,
2233                             bool dio)
2234 {
2235         struct buffer_head *orphan_dir_bh = NULL;
2236         int status = 0;
2237         struct ocfs2_dinode *orphan_fe;
2238         struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2239         int namelen = dio ?
2240                         (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2241                         OCFS2_ORPHAN_NAMELEN;
2242
2243         trace_ocfs2_orphan_add_begin(
2244                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2245
2246         status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2247         if (status < 0) {
2248                 mlog_errno(status);
2249                 goto leave;
2250         }
2251
2252         status = ocfs2_journal_access_di(handle,
2253                                          INODE_CACHE(orphan_dir_inode),
2254                                          orphan_dir_bh,
2255                                          OCFS2_JOURNAL_ACCESS_WRITE);
2256         if (status < 0) {
2257                 mlog_errno(status);
2258                 goto leave;
2259         }
2260
2261         /*
2262          * We're going to journal the change of i_flags and i_orphaned_slot.
2263          * It's safe anyway, though some callers may duplicate the journaling.
2264          * Journaling within the func just make the logic look more
2265          * straightforward.
2266          */
2267         status = ocfs2_journal_access_di(handle,
2268                                          INODE_CACHE(inode),
2269                                          fe_bh,
2270                                          OCFS2_JOURNAL_ACCESS_WRITE);
2271         if (status < 0) {
2272                 mlog_errno(status);
2273                 goto leave;
2274         }
2275
2276         /* we're a cluster, and nlink can change on disk from
2277          * underneath us... */
2278         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2279         if (S_ISDIR(inode->i_mode))
2280                 ocfs2_add_links_count(orphan_fe, 1);
2281         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2282         ocfs2_journal_dirty(handle, orphan_dir_bh);
2283
2284         status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2285                                    namelen, inode,
2286                                    OCFS2_I(inode)->ip_blkno,
2287                                    orphan_dir_bh, lookup);
2288         if (status < 0) {
2289                 mlog_errno(status);
2290                 goto rollback;
2291         }
2292
2293         if (dio) {
2294                 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan
2295                  * slot.
2296                  */
2297                 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2298                 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num);
2299         } else {
2300                 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2301                 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2302
2303                 /* Record which orphan dir our inode now resides
2304                  * in. delete_inode will use this to determine which orphan
2305                  * dir to lock. */
2306                 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2307         }
2308
2309         ocfs2_journal_dirty(handle, fe_bh);
2310
2311         trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2312                                    osb->slot_num);
2313
2314 rollback:
2315         if (status < 0) {
2316                 if (S_ISDIR(inode->i_mode))
2317                         ocfs2_add_links_count(orphan_fe, -1);
2318                 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2319         }
2320
2321 leave:
2322         brelse(orphan_dir_bh);
2323
2324         return status;
2325 }
2326
2327 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2328 int ocfs2_orphan_del(struct ocfs2_super *osb,
2329                      handle_t *handle,
2330                      struct inode *orphan_dir_inode,
2331                      struct inode *inode,
2332                      struct buffer_head *orphan_dir_bh,
2333                      bool dio)
2334 {
2335         char name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2336         struct ocfs2_dinode *orphan_fe;
2337         int status = 0;
2338         struct ocfs2_dir_lookup_result lookup = { NULL, };
2339
2340         if (dio) {
2341                 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2342                                 OCFS2_DIO_ORPHAN_PREFIX);
2343                 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2344                         status = -EINVAL;
2345                         mlog_errno(status);
2346                         return status;
2347                 }
2348
2349                 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno,
2350                                 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2351         } else
2352                 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2353         if (status < 0) {
2354                 mlog_errno(status);
2355                 goto leave;
2356         }
2357
2358         trace_ocfs2_orphan_del(
2359              (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2360              name, strlen(name));
2361
2362         status = ocfs2_journal_access_di(handle,
2363                                          INODE_CACHE(orphan_dir_inode),
2364                                          orphan_dir_bh,
2365                                          OCFS2_JOURNAL_ACCESS_WRITE);
2366         if (status < 0) {
2367                 mlog_errno(status);
2368                 goto leave;
2369         }
2370
2371         /* find it's spot in the orphan directory */
2372         status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode,
2373                                   &lookup);
2374         if (status) {
2375                 mlog_errno(status);
2376                 goto leave;
2377         }
2378
2379         /* remove it from the orphan directory */
2380         status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2381         if (status < 0) {
2382                 mlog_errno(status);
2383                 goto leave;
2384         }
2385
2386         /* do the i_nlink dance! :) */
2387         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2388         if (S_ISDIR(inode->i_mode))
2389                 ocfs2_add_links_count(orphan_fe, -1);
2390         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2391         ocfs2_journal_dirty(handle, orphan_dir_bh);
2392
2393 leave:
2394         ocfs2_free_dir_lookup_result(&lookup);
2395
2396         if (status)
2397                 mlog_errno(status);
2398         return status;
2399 }
2400
2401 /**
2402  * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2403  * allocated file. This is different from the typical 'add to orphan dir'
2404  * operation in that the inode does not yet exist. This is a problem because
2405  * the orphan dir stringifies the inode block number to come up with it's
2406  * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2407  * problem. This function works around it by calling deeper into the orphan
2408  * and suballoc code than other callers. Use this only by necessity.
2409  * @dir: The directory which this inode will ultimately wind up under - not the
2410  * orphan dir!
2411  * @dir_bh: buffer_head the @dir inode block
2412  * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2413  * with the string to be used for orphan dirent. Pass back to the orphan dir
2414  * code.
2415  * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2416  * dir code.
2417  * @ret_di_blkno: block number where the new inode will be allocated.
2418  * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2419  * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2420  *
2421  * Returns zero on success and the ret_orphan_dir, name and lookup
2422  * fields will be populated.
2423  *
2424  * Returns non-zero on failure. 
2425  */
2426 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2427                                         struct buffer_head *dir_bh,
2428                                         char *orphan_name,
2429                                         struct inode **ret_orphan_dir,
2430                                         u64 *ret_di_blkno,
2431                                         struct ocfs2_dir_lookup_result *orphan_insert,
2432                                         struct ocfs2_alloc_context **ret_inode_ac)
2433 {
2434         int ret;
2435         u64 di_blkno;
2436         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2437         struct inode *orphan_dir = NULL;
2438         struct buffer_head *orphan_dir_bh = NULL;
2439         struct ocfs2_alloc_context *inode_ac = NULL;
2440
2441         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2442         if (ret < 0) {
2443                 mlog_errno(ret);
2444                 return ret;
2445         }
2446
2447         /* reserve an inode spot */
2448         ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2449         if (ret < 0) {
2450                 if (ret != -ENOSPC)
2451                         mlog_errno(ret);
2452                 goto out;
2453         }
2454
2455         ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2456                                        &di_blkno);
2457         if (ret) {
2458                 mlog_errno(ret);
2459                 goto out;
2460         }
2461
2462         ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2463                                          di_blkno, orphan_name, orphan_insert,
2464                                          false);
2465         if (ret < 0) {
2466                 mlog_errno(ret);
2467                 goto out;
2468         }
2469
2470 out:
2471         if (ret == 0) {
2472                 *ret_orphan_dir = orphan_dir;
2473                 *ret_di_blkno = di_blkno;
2474                 *ret_inode_ac = inode_ac;
2475                 /*
2476                  * orphan_name and orphan_insert are already up to
2477                  * date via prepare_orphan_dir
2478                  */
2479         } else {
2480                 /* Unroll reserve_new_inode* */
2481                 if (inode_ac)
2482                         ocfs2_free_alloc_context(inode_ac);
2483
2484                 /* Unroll orphan dir locking */
2485                 inode_unlock(orphan_dir);
2486                 ocfs2_inode_unlock(orphan_dir, 1);
2487                 iput(orphan_dir);
2488         }
2489
2490         brelse(orphan_dir_bh);
2491
2492         return ret;
2493 }
2494
2495 int ocfs2_create_inode_in_orphan(struct inode *dir,
2496                                  int mode,
2497                                  struct inode **new_inode)
2498 {
2499         int status, did_quota_inode = 0;
2500         struct inode *inode = NULL;
2501         struct inode *orphan_dir = NULL;
2502         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2503         struct ocfs2_dinode *di = NULL;
2504         handle_t *handle = NULL;
2505         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2506         struct buffer_head *parent_di_bh = NULL;
2507         struct buffer_head *new_di_bh = NULL;
2508         struct ocfs2_alloc_context *inode_ac = NULL;
2509         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2510         u64 uninitialized_var(di_blkno), suballoc_loc;
2511         u16 suballoc_bit;
2512
2513         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2514         if (status < 0) {
2515                 if (status != -ENOENT)
2516                         mlog_errno(status);
2517                 return status;
2518         }
2519
2520         status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2521                                               orphan_name, &orphan_dir,
2522                                               &di_blkno, &orphan_insert, &inode_ac);
2523         if (status < 0) {
2524                 if (status != -ENOSPC)
2525                         mlog_errno(status);
2526                 goto leave;
2527         }
2528
2529         inode = ocfs2_get_init_inode(dir, mode);
2530         if (IS_ERR(inode)) {
2531                 status = PTR_ERR(inode);
2532                 inode = NULL;
2533                 mlog_errno(status);
2534                 goto leave;
2535         }
2536
2537         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2538         if (IS_ERR(handle)) {
2539                 status = PTR_ERR(handle);
2540                 handle = NULL;
2541                 mlog_errno(status);
2542                 goto leave;
2543         }
2544
2545         status = dquot_alloc_inode(inode);
2546         if (status)
2547                 goto leave;
2548         did_quota_inode = 1;
2549
2550         status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2551                                               &suballoc_loc,
2552                                               &suballoc_bit, di_blkno);
2553         if (status < 0) {
2554                 mlog_errno(status);
2555                 goto leave;
2556         }
2557
2558         clear_nlink(inode);
2559         /* do the real work now. */
2560         status = __ocfs2_mknod_locked(dir, inode,
2561                                       0, &new_di_bh, parent_di_bh, handle,
2562                                       inode_ac, di_blkno, suballoc_loc,
2563                                       suballoc_bit);
2564         if (status < 0) {
2565                 mlog_errno(status);
2566                 goto leave;
2567         }
2568
2569         di = (struct ocfs2_dinode *)new_di_bh->b_data;
2570         status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2571                                   &orphan_insert, orphan_dir, false);
2572         if (status < 0) {
2573                 mlog_errno(status);
2574                 goto leave;
2575         }
2576
2577         /* get open lock so that only nodes can't remove it from orphan dir. */
2578         status = ocfs2_open_lock(inode);
2579         if (status < 0)
2580                 mlog_errno(status);
2581
2582         insert_inode_hash(inode);
2583 leave:
2584         if (status < 0 && did_quota_inode)
2585                 dquot_free_inode(inode);
2586         if (handle)
2587                 ocfs2_commit_trans(osb, handle);
2588
2589         if (orphan_dir) {
2590                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2591                 ocfs2_inode_unlock(orphan_dir, 1);
2592                 inode_unlock(orphan_dir);
2593                 iput(orphan_dir);
2594         }
2595
2596         if ((status < 0) && inode) {
2597                 clear_nlink(inode);
2598                 iput(inode);
2599         }
2600
2601         if (inode_ac)
2602                 ocfs2_free_alloc_context(inode_ac);
2603
2604         brelse(new_di_bh);
2605
2606         if (!status)
2607                 *new_inode = inode;
2608
2609         ocfs2_free_dir_lookup_result(&orphan_insert);
2610
2611         ocfs2_inode_unlock(dir, 1);
2612         brelse(parent_di_bh);
2613         return status;
2614 }
2615
2616 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
2617         struct inode *inode)
2618 {
2619         char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2620         struct inode *orphan_dir_inode = NULL;
2621         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2622         struct buffer_head *di_bh = NULL;
2623         int status = 0;
2624         handle_t *handle = NULL;
2625         struct ocfs2_dinode *di = NULL;
2626
2627         status = ocfs2_inode_lock(inode, &di_bh, 1);
2628         if (status < 0) {
2629                 mlog_errno(status);
2630                 goto bail;
2631         }
2632
2633         di = (struct ocfs2_dinode *) di_bh->b_data;
2634         /*
2635          * Another append dio crashed?
2636          * If so, manually recover it first.
2637          */
2638         if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
2639                 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode));
2640                 if (status < 0) {
2641                         if (status != -ENOSPC)
2642                                 mlog_errno(status);
2643                         goto bail_unlock_inode;
2644                 }
2645
2646                 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0);
2647                 if (status < 0) {
2648                         mlog_errno(status);
2649                         goto bail_unlock_inode;
2650                 }
2651         }
2652
2653         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
2654                         OCFS2_I(inode)->ip_blkno,
2655                         orphan_name,
2656                         &orphan_insert,
2657                         true);
2658         if (status < 0) {
2659                 mlog_errno(status);
2660                 goto bail_unlock_inode;
2661         }
2662
2663         handle = ocfs2_start_trans(osb,
2664                         OCFS2_INODE_ADD_TO_ORPHAN_CREDITS);
2665         if (IS_ERR(handle)) {
2666                 status = PTR_ERR(handle);
2667                 goto bail_unlock_orphan;
2668         }
2669
2670         status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
2671                         &orphan_insert, orphan_dir_inode, true);
2672         if (status)
2673                 mlog_errno(status);
2674
2675         ocfs2_commit_trans(osb, handle);
2676
2677 bail_unlock_orphan:
2678         ocfs2_inode_unlock(orphan_dir_inode, 1);
2679         inode_unlock(orphan_dir_inode);
2680         iput(orphan_dir_inode);
2681
2682         ocfs2_free_dir_lookup_result(&orphan_insert);
2683
2684 bail_unlock_inode:
2685         ocfs2_inode_unlock(inode, 1);
2686         brelse(di_bh);
2687
2688 bail:
2689         return status;
2690 }
2691
2692 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
2693                 struct inode *inode, struct buffer_head *di_bh,
2694                 int update_isize, loff_t end)
2695 {
2696         struct inode *orphan_dir_inode = NULL;
2697         struct buffer_head *orphan_dir_bh = NULL;
2698         struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2699         handle_t *handle = NULL;
2700         int status = 0;
2701
2702         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2703                         ORPHAN_DIR_SYSTEM_INODE,
2704                         le16_to_cpu(di->i_dio_orphaned_slot));
2705         if (!orphan_dir_inode) {
2706                 status = -ENOENT;
2707                 mlog_errno(status);
2708                 goto bail;
2709         }
2710
2711         inode_lock(orphan_dir_inode);
2712         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2713         if (status < 0) {
2714                 inode_unlock(orphan_dir_inode);
2715                 iput(orphan_dir_inode);
2716                 mlog_errno(status);
2717                 goto bail;
2718         }
2719
2720         handle = ocfs2_start_trans(osb,
2721                         OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS);
2722         if (IS_ERR(handle)) {
2723                 status = PTR_ERR(handle);
2724                 goto bail_unlock_orphan;
2725         }
2726
2727         BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)));
2728
2729         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
2730                                 inode, orphan_dir_bh, true);
2731         if (status < 0) {
2732                 mlog_errno(status);
2733                 goto bail_commit;
2734         }
2735
2736         status = ocfs2_journal_access_di(handle,
2737                         INODE_CACHE(inode),
2738                         di_bh,
2739                         OCFS2_JOURNAL_ACCESS_WRITE);
2740         if (status < 0) {
2741                 mlog_errno(status);
2742                 goto bail_commit;
2743         }
2744
2745         di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2746         di->i_dio_orphaned_slot = 0;
2747
2748         if (update_isize) {
2749                 status = ocfs2_set_inode_size(handle, inode, di_bh, end);
2750                 if (status)
2751                         mlog_errno(status);
2752         } else
2753                 ocfs2_journal_dirty(handle, di_bh);
2754
2755 bail_commit:
2756         ocfs2_commit_trans(osb, handle);
2757
2758 bail_unlock_orphan:
2759         ocfs2_inode_unlock(orphan_dir_inode, 1);
2760         inode_unlock(orphan_dir_inode);
2761         brelse(orphan_dir_bh);
2762         iput(orphan_dir_inode);
2763
2764 bail:
2765         return status;
2766 }
2767
2768 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2769                                    struct inode *inode,
2770                                    struct dentry *dentry)
2771 {
2772         int status = 0;
2773         struct buffer_head *parent_di_bh = NULL;
2774         handle_t *handle = NULL;
2775         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2776         struct ocfs2_dinode *dir_di, *di;
2777         struct inode *orphan_dir_inode = NULL;
2778         struct buffer_head *orphan_dir_bh = NULL;
2779         struct buffer_head *di_bh = NULL;
2780         struct ocfs2_dir_lookup_result lookup = { NULL, };
2781
2782         trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2783                                 dentry->d_name.len, dentry->d_name.name,
2784                                 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2785                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2786
2787         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2788         if (status < 0) {
2789                 if (status != -ENOENT)
2790                         mlog_errno(status);
2791                 return status;
2792         }
2793
2794         dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2795         if (!dir_di->i_links_count) {
2796                 /* can't make a file in a deleted directory. */
2797                 status = -ENOENT;
2798                 goto leave;
2799         }
2800
2801         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2802                                            dentry->d_name.len);
2803         if (status)
2804                 goto leave;
2805
2806         /* get a spot inside the dir. */
2807         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2808                                               dentry->d_name.name,
2809                                               dentry->d_name.len, &lookup);
2810         if (status < 0) {
2811                 mlog_errno(status);
2812                 goto leave;
2813         }
2814
2815         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2816                                                        ORPHAN_DIR_SYSTEM_INODE,
2817                                                        osb->slot_num);
2818         if (!orphan_dir_inode) {
2819                 status = -ENOENT;
2820                 mlog_errno(status);
2821                 goto leave;
2822         }
2823
2824         inode_lock(orphan_dir_inode);
2825
2826         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2827         if (status < 0) {
2828                 mlog_errno(status);
2829                 inode_unlock(orphan_dir_inode);
2830                 iput(orphan_dir_inode);
2831                 goto leave;
2832         }
2833
2834         status = ocfs2_read_inode_block(inode, &di_bh);
2835         if (status < 0) {
2836                 mlog_errno(status);
2837                 goto orphan_unlock;
2838         }
2839
2840         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2841         if (IS_ERR(handle)) {
2842                 status = PTR_ERR(handle);
2843                 handle = NULL;
2844                 mlog_errno(status);
2845                 goto orphan_unlock;
2846         }
2847
2848         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2849                                          di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2850         if (status < 0) {
2851                 mlog_errno(status);
2852                 goto out_commit;
2853         }
2854
2855         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2856                                   orphan_dir_bh, false);
2857         if (status < 0) {
2858                 mlog_errno(status);
2859                 goto out_commit;
2860         }
2861
2862         di = (struct ocfs2_dinode *)di_bh->b_data;
2863         di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2864         di->i_orphaned_slot = 0;
2865         set_nlink(inode, 1);
2866         ocfs2_set_links_count(di, inode->i_nlink);
2867         ocfs2_update_inode_fsync_trans(handle, inode, 1);
2868         ocfs2_journal_dirty(handle, di_bh);
2869
2870         status = ocfs2_add_entry(handle, dentry, inode,
2871                                  OCFS2_I(inode)->ip_blkno, parent_di_bh,
2872                                  &lookup);
2873         if (status < 0) {
2874                 mlog_errno(status);
2875                 goto out_commit;
2876         }
2877
2878         status = ocfs2_dentry_attach_lock(dentry, inode,
2879                                           OCFS2_I(dir)->ip_blkno);
2880         if (status) {
2881                 mlog_errno(status);
2882                 goto out_commit;
2883         }
2884
2885         d_instantiate(dentry, inode);
2886         status = 0;
2887 out_commit:
2888         ocfs2_commit_trans(osb, handle);
2889 orphan_unlock:
2890         ocfs2_inode_unlock(orphan_dir_inode, 1);
2891         inode_unlock(orphan_dir_inode);
2892         iput(orphan_dir_inode);
2893 leave:
2894
2895         ocfs2_inode_unlock(dir, 1);
2896
2897         brelse(di_bh);
2898         brelse(parent_di_bh);
2899         brelse(orphan_dir_bh);
2900
2901         ocfs2_free_dir_lookup_result(&lookup);
2902
2903         if (status)
2904                 mlog_errno(status);
2905
2906         return status;
2907 }
2908
2909 const struct inode_operations ocfs2_dir_iops = {
2910         .create         = ocfs2_create,
2911         .lookup         = ocfs2_lookup,
2912         .link           = ocfs2_link,
2913         .unlink         = ocfs2_unlink,
2914         .rmdir          = ocfs2_unlink,
2915         .symlink        = ocfs2_symlink,
2916         .mkdir          = ocfs2_mkdir,
2917         .mknod          = ocfs2_mknod,
2918         .rename         = ocfs2_rename,
2919         .setattr        = ocfs2_setattr,
2920         .getattr        = ocfs2_getattr,
2921         .permission     = ocfs2_permission,
2922         .listxattr      = ocfs2_listxattr,
2923         .fiemap         = ocfs2_fiemap,
2924         .get_acl        = ocfs2_iop_get_acl,
2925         .set_acl        = ocfs2_iop_set_acl,
2926 };