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TOMOYO Linux Cross Reference
Linux/fs/ocfs2/namei.c

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  1 // SPDX-License-Identifier: GPL-2.0-or-later
  2 /* -*- mode: c; c-basic-offset: 8; -*-
  3  * vim: noexpandtab sw=8 ts=8 sts=0:
  4  *
  5  * namei.c
  6  *
  7  * Create and rename file, directory, symlinks
  8  *
  9  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
 10  *
 11  *  Portions of this code from linux/fs/ext3/dir.c
 12  *
 13  *  Copyright (C) 1992, 1993, 1994, 1995
 14  *  Remy Card (card@masi.ibp.fr)
 15  *  Laboratoire MASI - Institut Blaise pascal
 16  *  Universite Pierre et Marie Curie (Paris VI)
 17  *
 18  *   from
 19  *
 20  *   linux/fs/minix/dir.c
 21  *
 22  *   Copyright (C) 1991, 1992 Linux Torvalds
 23  */
 24 
 25 #include <linux/fs.h>
 26 #include <linux/types.h>
 27 #include <linux/slab.h>
 28 #include <linux/highmem.h>
 29 #include <linux/quotaops.h>
 30 #include <linux/iversion.h>
 31 
 32 #include <cluster/masklog.h>
 33 
 34 #include "ocfs2.h"
 35 
 36 #include "alloc.h"
 37 #include "dcache.h"
 38 #include "dir.h"
 39 #include "dlmglue.h"
 40 #include "extent_map.h"
 41 #include "file.h"
 42 #include "inode.h"
 43 #include "journal.h"
 44 #include "namei.h"
 45 #include "suballoc.h"
 46 #include "super.h"
 47 #include "symlink.h"
 48 #include "sysfile.h"
 49 #include "uptodate.h"
 50 #include "xattr.h"
 51 #include "acl.h"
 52 #include "ocfs2_trace.h"
 53 
 54 #include "buffer_head_io.h"
 55 
 56 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
 57                               struct inode *dir,
 58                               struct inode *inode,
 59                               dev_t dev,
 60                               struct buffer_head **new_fe_bh,
 61                               struct buffer_head *parent_fe_bh,
 62                               handle_t *handle,
 63                               struct ocfs2_alloc_context *inode_ac);
 64 
 65 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
 66                                     struct inode **ret_orphan_dir,
 67                                     u64 blkno,
 68                                     char *name,
 69                                     struct ocfs2_dir_lookup_result *lookup,
 70                                     bool dio);
 71 
 72 static int ocfs2_orphan_add(struct ocfs2_super *osb,
 73                             handle_t *handle,
 74                             struct inode *inode,
 75                             struct buffer_head *fe_bh,
 76                             char *name,
 77                             struct ocfs2_dir_lookup_result *lookup,
 78                             struct inode *orphan_dir_inode,
 79                             bool dio);
 80 
 81 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
 82                                      handle_t *handle,
 83                                      struct inode *inode,
 84                                      const char *symname);
 85 
 86 static int ocfs2_double_lock(struct ocfs2_super *osb,
 87                              struct buffer_head **bh1,
 88                              struct inode *inode1,
 89                              struct buffer_head **bh2,
 90                              struct inode *inode2,
 91                              int rename);
 92 
 93 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2);
 94 /* An orphan dir name is an 8 byte value, printed as a hex string */
 95 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
 96 
 97 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
 98                                    unsigned int flags)
 99 {
100         int status;
101         u64 blkno;
102         struct inode *inode = NULL;
103         struct dentry *ret;
104         struct ocfs2_inode_info *oi;
105 
106         trace_ocfs2_lookup(dir, dentry, dentry->d_name.len,
107                            dentry->d_name.name,
108                            (unsigned long long)OCFS2_I(dir)->ip_blkno, 0);
109 
110         if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
111                 ret = ERR_PTR(-ENAMETOOLONG);
112                 goto bail;
113         }
114 
115         status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
116         if (status < 0) {
117                 if (status != -ENOENT)
118                         mlog_errno(status);
119                 ret = ERR_PTR(status);
120                 goto bail;
121         }
122 
123         status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
124                                             dentry->d_name.len, &blkno);
125         if (status < 0)
126                 goto bail_add;
127 
128         inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
129         if (IS_ERR(inode)) {
130                 ret = ERR_PTR(-EACCES);
131                 goto bail_unlock;
132         }
133 
134         oi = OCFS2_I(inode);
135         /* Clear any orphaned state... If we were able to look up the
136          * inode from a directory, it certainly can't be orphaned. We
137          * might have the bad state from a node which intended to
138          * orphan this inode but crashed before it could commit the
139          * unlink. */
140         spin_lock(&oi->ip_lock);
141         oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
142         spin_unlock(&oi->ip_lock);
143 
144 bail_add:
145         ret = d_splice_alias(inode, dentry);
146 
147         if (inode) {
148                 /*
149                  * If d_splice_alias() finds a DCACHE_DISCONNECTED
150                  * dentry, it will d_move() it on top of ourse. The
151                  * return value will indicate this however, so in
152                  * those cases, we switch them around for the locking
153                  * code.
154                  *
155                  * NOTE: This dentry already has ->d_op set from
156                  * ocfs2_get_parent() and ocfs2_get_dentry()
157                  */
158                 if (!IS_ERR_OR_NULL(ret))
159                         dentry = ret;
160 
161                 status = ocfs2_dentry_attach_lock(dentry, inode,
162                                                   OCFS2_I(dir)->ip_blkno);
163                 if (status) {
164                         mlog_errno(status);
165                         ret = ERR_PTR(status);
166                         goto bail_unlock;
167                 }
168         } else
169                 ocfs2_dentry_attach_gen(dentry);
170 
171 bail_unlock:
172         /* Don't drop the cluster lock until *after* the d_add --
173          * unlink on another node will message us to remove that
174          * dentry under this lock so otherwise we can race this with
175          * the downconvert thread and have a stale dentry. */
176         ocfs2_inode_unlock(dir, 0);
177 
178 bail:
179 
180         trace_ocfs2_lookup_ret(ret);
181 
182         return ret;
183 }
184 
185 static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode)
186 {
187         struct inode *inode;
188         int status;
189 
190         inode = new_inode(dir->i_sb);
191         if (!inode) {
192                 mlog(ML_ERROR, "new_inode failed!\n");
193                 return ERR_PTR(-ENOMEM);
194         }
195 
196         /* populate as many fields early on as possible - many of
197          * these are used by the support functions here and in
198          * callers. */
199         if (S_ISDIR(mode))
200                 set_nlink(inode, 2);
201         inode_init_owner(inode, dir, mode);
202         status = dquot_initialize(inode);
203         if (status)
204                 return ERR_PTR(status);
205 
206         return inode;
207 }
208 
209 static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb,
210                 struct dentry *dentry, struct inode *inode)
211 {
212         struct ocfs2_dentry_lock *dl = dentry->d_fsdata;
213 
214         ocfs2_simple_drop_lockres(osb, &dl->dl_lockres);
215         ocfs2_lock_res_free(&dl->dl_lockres);
216         BUG_ON(dl->dl_count != 1);
217         spin_lock(&dentry_attach_lock);
218         dentry->d_fsdata = NULL;
219         spin_unlock(&dentry_attach_lock);
220         kfree(dl);
221         iput(inode);
222 }
223 
224 static int ocfs2_mknod(struct inode *dir,
225                        struct dentry *dentry,
226                        umode_t mode,
227                        dev_t dev)
228 {
229         int status = 0;
230         struct buffer_head *parent_fe_bh = NULL;
231         handle_t *handle = NULL;
232         struct ocfs2_super *osb;
233         struct ocfs2_dinode *dirfe;
234         struct buffer_head *new_fe_bh = NULL;
235         struct inode *inode = NULL;
236         struct ocfs2_alloc_context *inode_ac = NULL;
237         struct ocfs2_alloc_context *data_ac = NULL;
238         struct ocfs2_alloc_context *meta_ac = NULL;
239         int want_clusters = 0;
240         int want_meta = 0;
241         int xattr_credits = 0;
242         struct ocfs2_security_xattr_info si = {
243                 .enable = 1,
244         };
245         int did_quota_inode = 0;
246         struct ocfs2_dir_lookup_result lookup = { NULL, };
247         sigset_t oldset;
248         int did_block_signals = 0;
249         struct ocfs2_dentry_lock *dl = NULL;
250 
251         trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
252                           (unsigned long long)OCFS2_I(dir)->ip_blkno,
253                           (unsigned long)dev, mode);
254 
255         status = dquot_initialize(dir);
256         if (status) {
257                 mlog_errno(status);
258                 return status;
259         }
260 
261         /* get our super block */
262         osb = OCFS2_SB(dir->i_sb);
263 
264         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
265         if (status < 0) {
266                 if (status != -ENOENT)
267                         mlog_errno(status);
268                 return status;
269         }
270 
271         if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
272                 status = -EMLINK;
273                 goto leave;
274         }
275 
276         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
277         if (!ocfs2_read_links_count(dirfe)) {
278                 /* can't make a file in a deleted directory. */
279                 status = -ENOENT;
280                 goto leave;
281         }
282 
283         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
284                                            dentry->d_name.len);
285         if (status)
286                 goto leave;
287 
288         /* get a spot inside the dir. */
289         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
290                                               dentry->d_name.name,
291                                               dentry->d_name.len, &lookup);
292         if (status < 0) {
293                 mlog_errno(status);
294                 goto leave;
295         }
296 
297         /* reserve an inode spot */
298         status = ocfs2_reserve_new_inode(osb, &inode_ac);
299         if (status < 0) {
300                 if (status != -ENOSPC)
301                         mlog_errno(status);
302                 goto leave;
303         }
304 
305         inode = ocfs2_get_init_inode(dir, mode);
306         if (IS_ERR(inode)) {
307                 status = PTR_ERR(inode);
308                 inode = NULL;
309                 mlog_errno(status);
310                 goto leave;
311         }
312 
313         /* get security xattr */
314         status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
315         if (status) {
316                 if (status == -EOPNOTSUPP)
317                         si.enable = 0;
318                 else {
319                         mlog_errno(status);
320                         goto leave;
321                 }
322         }
323 
324         /* calculate meta data/clusters for setting security and acl xattr */
325         status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
326                                        &si, &want_clusters,
327                                        &xattr_credits, &want_meta);
328         if (status < 0) {
329                 mlog_errno(status);
330                 goto leave;
331         }
332 
333         /* Reserve a cluster if creating an extent based directory. */
334         if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
335                 want_clusters += 1;
336 
337                 /* Dir indexing requires extra space as well */
338                 if (ocfs2_supports_indexed_dirs(osb))
339                         want_meta++;
340         }
341 
342         status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
343         if (status < 0) {
344                 if (status != -ENOSPC)
345                         mlog_errno(status);
346                 goto leave;
347         }
348 
349         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
350         if (status < 0) {
351                 if (status != -ENOSPC)
352                         mlog_errno(status);
353                 goto leave;
354         }
355 
356         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
357                                                             S_ISDIR(mode),
358                                                             xattr_credits));
359         if (IS_ERR(handle)) {
360                 status = PTR_ERR(handle);
361                 handle = NULL;
362                 mlog_errno(status);
363                 goto leave;
364         }
365 
366         /* Starting to change things, restart is no longer possible. */
367         ocfs2_block_signals(&oldset);
368         did_block_signals = 1;
369 
370         status = dquot_alloc_inode(inode);
371         if (status)
372                 goto leave;
373         did_quota_inode = 1;
374 
375         /* do the real work now. */
376         status = ocfs2_mknod_locked(osb, dir, inode, dev,
377                                     &new_fe_bh, parent_fe_bh, handle,
378                                     inode_ac);
379         if (status < 0) {
380                 mlog_errno(status);
381                 goto leave;
382         }
383 
384         if (S_ISDIR(mode)) {
385                 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
386                                             new_fe_bh, data_ac, meta_ac);
387                 if (status < 0) {
388                         mlog_errno(status);
389                         goto leave;
390                 }
391 
392                 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
393                                                  parent_fe_bh,
394                                                  OCFS2_JOURNAL_ACCESS_WRITE);
395                 if (status < 0) {
396                         mlog_errno(status);
397                         goto leave;
398                 }
399                 ocfs2_add_links_count(dirfe, 1);
400                 ocfs2_journal_dirty(handle, parent_fe_bh);
401                 inc_nlink(dir);
402         }
403 
404         status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
405                          meta_ac, data_ac);
406 
407         if (status < 0) {
408                 mlog_errno(status);
409                 goto leave;
410         }
411 
412         if (si.enable) {
413                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
414                                                  meta_ac, data_ac);
415                 if (status < 0) {
416                         mlog_errno(status);
417                         goto leave;
418                 }
419         }
420 
421         /*
422          * Do this before adding the entry to the directory. We add
423          * also set d_op after success so that ->d_iput() will cleanup
424          * the dentry lock even if ocfs2_add_entry() fails below.
425          */
426         status = ocfs2_dentry_attach_lock(dentry, inode,
427                                           OCFS2_I(dir)->ip_blkno);
428         if (status) {
429                 mlog_errno(status);
430                 goto leave;
431         }
432 
433         dl = dentry->d_fsdata;
434 
435         status = ocfs2_add_entry(handle, dentry, inode,
436                                  OCFS2_I(inode)->ip_blkno, parent_fe_bh,
437                                  &lookup);
438         if (status < 0) {
439                 mlog_errno(status);
440                 goto leave;
441         }
442 
443         insert_inode_hash(inode);
444         d_instantiate(dentry, inode);
445         status = 0;
446 leave:
447         if (status < 0 && did_quota_inode)
448                 dquot_free_inode(inode);
449         if (handle)
450                 ocfs2_commit_trans(osb, handle);
451 
452         ocfs2_inode_unlock(dir, 1);
453         if (did_block_signals)
454                 ocfs2_unblock_signals(&oldset);
455 
456         brelse(new_fe_bh);
457         brelse(parent_fe_bh);
458         kfree(si.value);
459 
460         ocfs2_free_dir_lookup_result(&lookup);
461 
462         if (inode_ac)
463                 ocfs2_free_alloc_context(inode_ac);
464 
465         if (data_ac)
466                 ocfs2_free_alloc_context(data_ac);
467 
468         if (meta_ac)
469                 ocfs2_free_alloc_context(meta_ac);
470 
471         /*
472          * We should call iput after the i_mutex of the bitmap been
473          * unlocked in ocfs2_free_alloc_context, or the
474          * ocfs2_delete_inode will mutex_lock again.
475          */
476         if ((status < 0) && inode) {
477                 if (dl)
478                         ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
479 
480                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
481                 clear_nlink(inode);
482                 iput(inode);
483         }
484 
485         if (status)
486                 mlog_errno(status);
487 
488         return status;
489 }
490 
491 static int __ocfs2_mknod_locked(struct inode *dir,
492                                 struct inode *inode,
493                                 dev_t dev,
494                                 struct buffer_head **new_fe_bh,
495                                 struct buffer_head *parent_fe_bh,
496                                 handle_t *handle,
497                                 struct ocfs2_alloc_context *inode_ac,
498                                 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
499 {
500         int status = 0;
501         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
502         struct ocfs2_dinode *fe = NULL;
503         struct ocfs2_extent_list *fel;
504         u16 feat;
505         struct ocfs2_inode_info *oi = OCFS2_I(inode);
506         struct timespec64 ts;
507 
508         *new_fe_bh = NULL;
509 
510         /* populate as many fields early on as possible - many of
511          * these are used by the support functions here and in
512          * callers. */
513         inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
514         oi->ip_blkno = fe_blkno;
515         spin_lock(&osb->osb_lock);
516         inode->i_generation = osb->s_next_generation++;
517         spin_unlock(&osb->osb_lock);
518 
519         *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
520         if (!*new_fe_bh) {
521                 status = -ENOMEM;
522                 mlog_errno(status);
523                 goto leave;
524         }
525         ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
526 
527         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
528                                          *new_fe_bh,
529                                          OCFS2_JOURNAL_ACCESS_CREATE);
530         if (status < 0) {
531                 mlog_errno(status);
532                 goto leave;
533         }
534 
535         fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
536         memset(fe, 0, osb->sb->s_blocksize);
537 
538         fe->i_generation = cpu_to_le32(inode->i_generation);
539         fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
540         fe->i_blkno = cpu_to_le64(fe_blkno);
541         fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
542         fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
543         fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
544         fe->i_uid = cpu_to_le32(i_uid_read(inode));
545         fe->i_gid = cpu_to_le32(i_gid_read(inode));
546         fe->i_mode = cpu_to_le16(inode->i_mode);
547         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
548                 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
549 
550         ocfs2_set_links_count(fe, inode->i_nlink);
551 
552         fe->i_last_eb_blk = 0;
553         strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
554         fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
555         ktime_get_real_ts64(&ts);
556         fe->i_atime = fe->i_ctime = fe->i_mtime =
557                 cpu_to_le64(ts.tv_sec);
558         fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
559                 cpu_to_le32(ts.tv_nsec);
560         fe->i_dtime = 0;
561 
562         /*
563          * If supported, directories start with inline data. If inline
564          * isn't supported, but indexing is, we start them as indexed.
565          */
566         feat = le16_to_cpu(fe->i_dyn_features);
567         if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
568                 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
569 
570                 fe->id2.i_data.id_count = cpu_to_le16(
571                                 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
572         } else {
573                 fel = &fe->id2.i_list;
574                 fel->l_tree_depth = 0;
575                 fel->l_next_free_rec = 0;
576                 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
577         }
578 
579         ocfs2_journal_dirty(handle, *new_fe_bh);
580 
581         ocfs2_populate_inode(inode, fe, 1);
582         ocfs2_ci_set_new(osb, INODE_CACHE(inode));
583         if (!ocfs2_mount_local(osb)) {
584                 status = ocfs2_create_new_inode_locks(inode);
585                 if (status < 0)
586                         mlog_errno(status);
587         }
588 
589         oi->i_sync_tid = handle->h_transaction->t_tid;
590         oi->i_datasync_tid = handle->h_transaction->t_tid;
591 
592 leave:
593         if (status < 0) {
594                 if (*new_fe_bh) {
595                         brelse(*new_fe_bh);
596                         *new_fe_bh = NULL;
597                 }
598         }
599 
600         if (status)
601                 mlog_errno(status);
602         return status;
603 }
604 
605 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
606                               struct inode *dir,
607                               struct inode *inode,
608                               dev_t dev,
609                               struct buffer_head **new_fe_bh,
610                               struct buffer_head *parent_fe_bh,
611                               handle_t *handle,
612                               struct ocfs2_alloc_context *inode_ac)
613 {
614         int status = 0;
615         u64 suballoc_loc, fe_blkno = 0;
616         u16 suballoc_bit;
617 
618         *new_fe_bh = NULL;
619 
620         status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
621                                        inode_ac, &suballoc_loc,
622                                        &suballoc_bit, &fe_blkno);
623         if (status < 0) {
624                 mlog_errno(status);
625                 return status;
626         }
627 
628         status = __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
629                                     parent_fe_bh, handle, inode_ac,
630                                     fe_blkno, suballoc_loc, suballoc_bit);
631         if (status < 0) {
632                 u64 bg_blkno = ocfs2_which_suballoc_group(fe_blkno, suballoc_bit);
633                 int tmp = ocfs2_free_suballoc_bits(handle, inode_ac->ac_inode,
634                                 inode_ac->ac_bh, suballoc_bit, bg_blkno, 1);
635                 if (tmp)
636                         mlog_errno(tmp);
637         }
638 
639         return status;
640 }
641 
642 static int ocfs2_mkdir(struct inode *dir,
643                        struct dentry *dentry,
644                        umode_t mode)
645 {
646         int ret;
647 
648         trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
649                           OCFS2_I(dir)->ip_blkno, mode);
650         ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
651         if (ret)
652                 mlog_errno(ret);
653 
654         return ret;
655 }
656 
657 static int ocfs2_create(struct inode *dir,
658                         struct dentry *dentry,
659                         umode_t mode,
660                         bool excl)
661 {
662         int ret;
663 
664         trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
665                            (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
666         ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
667         if (ret)
668                 mlog_errno(ret);
669 
670         return ret;
671 }
672 
673 static int ocfs2_link(struct dentry *old_dentry,
674                       struct inode *dir,
675                       struct dentry *dentry)
676 {
677         handle_t *handle;
678         struct inode *inode = d_inode(old_dentry);
679         struct inode *old_dir = d_inode(old_dentry->d_parent);
680         int err;
681         struct buffer_head *fe_bh = NULL;
682         struct buffer_head *old_dir_bh = NULL;
683         struct buffer_head *parent_fe_bh = NULL;
684         struct ocfs2_dinode *fe = NULL;
685         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
686         struct ocfs2_dir_lookup_result lookup = { NULL, };
687         sigset_t oldset;
688         u64 old_de_ino;
689 
690         trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
691                          old_dentry->d_name.len, old_dentry->d_name.name,
692                          dentry->d_name.len, dentry->d_name.name);
693 
694         if (S_ISDIR(inode->i_mode))
695                 return -EPERM;
696 
697         err = dquot_initialize(dir);
698         if (err) {
699                 mlog_errno(err);
700                 return err;
701         }
702 
703         err = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
704                         &parent_fe_bh, dir, 0);
705         if (err < 0) {
706                 if (err != -ENOENT)
707                         mlog_errno(err);
708                 return err;
709         }
710 
711         /* make sure both dirs have bhs
712          * get an extra ref on old_dir_bh if old==new */
713         if (!parent_fe_bh) {
714                 if (old_dir_bh) {
715                         parent_fe_bh = old_dir_bh;
716                         get_bh(parent_fe_bh);
717                 } else {
718                         mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str);
719                         err = -EIO;
720                         goto out;
721                 }
722         }
723 
724         if (!dir->i_nlink) {
725                 err = -ENOENT;
726                 goto out;
727         }
728 
729         err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
730                         old_dentry->d_name.len, &old_de_ino);
731         if (err) {
732                 err = -ENOENT;
733                 goto out;
734         }
735 
736         /*
737          * Check whether another node removed the source inode while we
738          * were in the vfs.
739          */
740         if (old_de_ino != OCFS2_I(inode)->ip_blkno) {
741                 err = -ENOENT;
742                 goto out;
743         }
744 
745         err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
746                                         dentry->d_name.len);
747         if (err)
748                 goto out;
749 
750         err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
751                                            dentry->d_name.name,
752                                            dentry->d_name.len, &lookup);
753         if (err < 0) {
754                 mlog_errno(err);
755                 goto out;
756         }
757 
758         err = ocfs2_inode_lock(inode, &fe_bh, 1);
759         if (err < 0) {
760                 if (err != -ENOENT)
761                         mlog_errno(err);
762                 goto out;
763         }
764 
765         fe = (struct ocfs2_dinode *) fe_bh->b_data;
766         if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
767                 err = -EMLINK;
768                 goto out_unlock_inode;
769         }
770 
771         handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
772         if (IS_ERR(handle)) {
773                 err = PTR_ERR(handle);
774                 handle = NULL;
775                 mlog_errno(err);
776                 goto out_unlock_inode;
777         }
778 
779         /* Starting to change things, restart is no longer possible. */
780         ocfs2_block_signals(&oldset);
781 
782         err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
783                                       OCFS2_JOURNAL_ACCESS_WRITE);
784         if (err < 0) {
785                 mlog_errno(err);
786                 goto out_commit;
787         }
788 
789         inc_nlink(inode);
790         inode->i_ctime = current_time(inode);
791         ocfs2_set_links_count(fe, inode->i_nlink);
792         fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
793         fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
794         ocfs2_journal_dirty(handle, fe_bh);
795 
796         err = ocfs2_add_entry(handle, dentry, inode,
797                               OCFS2_I(inode)->ip_blkno,
798                               parent_fe_bh, &lookup);
799         if (err) {
800                 ocfs2_add_links_count(fe, -1);
801                 drop_nlink(inode);
802                 mlog_errno(err);
803                 goto out_commit;
804         }
805 
806         err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
807         if (err) {
808                 mlog_errno(err);
809                 goto out_commit;
810         }
811 
812         ihold(inode);
813         d_instantiate(dentry, inode);
814 
815 out_commit:
816         ocfs2_commit_trans(osb, handle);
817         ocfs2_unblock_signals(&oldset);
818 out_unlock_inode:
819         ocfs2_inode_unlock(inode, 1);
820 
821 out:
822         ocfs2_double_unlock(old_dir, dir);
823 
824         brelse(fe_bh);
825         brelse(parent_fe_bh);
826         brelse(old_dir_bh);
827 
828         ocfs2_free_dir_lookup_result(&lookup);
829 
830         if (err)
831                 mlog_errno(err);
832 
833         return err;
834 }
835 
836 /*
837  * Takes and drops an exclusive lock on the given dentry. This will
838  * force other nodes to drop it.
839  */
840 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
841 {
842         int ret;
843 
844         ret = ocfs2_dentry_lock(dentry, 1);
845         if (ret)
846                 mlog_errno(ret);
847         else
848                 ocfs2_dentry_unlock(dentry, 1);
849 
850         return ret;
851 }
852 
853 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
854 {
855         if (S_ISDIR(inode->i_mode)) {
856                 if (inode->i_nlink == 2)
857                         return 1;
858                 return 0;
859         }
860 
861         if (inode->i_nlink == 1)
862                 return 1;
863         return 0;
864 }
865 
866 static int ocfs2_unlink(struct inode *dir,
867                         struct dentry *dentry)
868 {
869         int status;
870         int child_locked = 0;
871         bool is_unlinkable = false;
872         struct inode *inode = d_inode(dentry);
873         struct inode *orphan_dir = NULL;
874         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
875         u64 blkno;
876         struct ocfs2_dinode *fe = NULL;
877         struct buffer_head *fe_bh = NULL;
878         struct buffer_head *parent_node_bh = NULL;
879         handle_t *handle = NULL;
880         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
881         struct ocfs2_dir_lookup_result lookup = { NULL, };
882         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
883 
884         trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
885                            dentry->d_name.name,
886                            (unsigned long long)OCFS2_I(dir)->ip_blkno,
887                            (unsigned long long)OCFS2_I(inode)->ip_blkno);
888 
889         status = dquot_initialize(dir);
890         if (status) {
891                 mlog_errno(status);
892                 return status;
893         }
894 
895         BUG_ON(d_inode(dentry->d_parent) != dir);
896 
897         if (inode == osb->root_inode)
898                 return -EPERM;
899 
900         status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
901                                          OI_LS_PARENT);
902         if (status < 0) {
903                 if (status != -ENOENT)
904                         mlog_errno(status);
905                 return status;
906         }
907 
908         status = ocfs2_find_files_on_disk(dentry->d_name.name,
909                                           dentry->d_name.len, &blkno, dir,
910                                           &lookup);
911         if (status < 0) {
912                 if (status != -ENOENT)
913                         mlog_errno(status);
914                 goto leave;
915         }
916 
917         if (OCFS2_I(inode)->ip_blkno != blkno) {
918                 status = -ENOENT;
919 
920                 trace_ocfs2_unlink_noent(
921                                 (unsigned long long)OCFS2_I(inode)->ip_blkno,
922                                 (unsigned long long)blkno,
923                                 OCFS2_I(inode)->ip_flags);
924                 goto leave;
925         }
926 
927         status = ocfs2_inode_lock(inode, &fe_bh, 1);
928         if (status < 0) {
929                 if (status != -ENOENT)
930                         mlog_errno(status);
931                 goto leave;
932         }
933         child_locked = 1;
934 
935         if (S_ISDIR(inode->i_mode)) {
936                 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
937                         status = -ENOTEMPTY;
938                         goto leave;
939                 }
940         }
941 
942         status = ocfs2_remote_dentry_delete(dentry);
943         if (status < 0) {
944                 /* This remote delete should succeed under all normal
945                  * circumstances. */
946                 mlog_errno(status);
947                 goto leave;
948         }
949 
950         if (ocfs2_inode_is_unlinkable(inode)) {
951                 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
952                                                   OCFS2_I(inode)->ip_blkno,
953                                                   orphan_name, &orphan_insert,
954                                                   false);
955                 if (status < 0) {
956                         mlog_errno(status);
957                         goto leave;
958                 }
959                 is_unlinkable = true;
960         }
961 
962         handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
963         if (IS_ERR(handle)) {
964                 status = PTR_ERR(handle);
965                 handle = NULL;
966                 mlog_errno(status);
967                 goto leave;
968         }
969 
970         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
971                                          OCFS2_JOURNAL_ACCESS_WRITE);
972         if (status < 0) {
973                 mlog_errno(status);
974                 goto leave;
975         }
976 
977         fe = (struct ocfs2_dinode *) fe_bh->b_data;
978 
979         /* delete the name from the parent dir */
980         status = ocfs2_delete_entry(handle, dir, &lookup);
981         if (status < 0) {
982                 mlog_errno(status);
983                 goto leave;
984         }
985 
986         if (S_ISDIR(inode->i_mode))
987                 drop_nlink(inode);
988         drop_nlink(inode);
989         ocfs2_set_links_count(fe, inode->i_nlink);
990         ocfs2_journal_dirty(handle, fe_bh);
991 
992         dir->i_ctime = dir->i_mtime = current_time(dir);
993         if (S_ISDIR(inode->i_mode))
994                 drop_nlink(dir);
995 
996         status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
997         if (status < 0) {
998                 mlog_errno(status);
999                 if (S_ISDIR(inode->i_mode))
1000                         inc_nlink(dir);
1001                 goto leave;
1002         }
1003 
1004         if (is_unlinkable) {
1005                 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
1006                                 orphan_name, &orphan_insert, orphan_dir, false);
1007                 if (status < 0)
1008                         mlog_errno(status);
1009         }
1010 
1011 leave:
1012         if (handle)
1013                 ocfs2_commit_trans(osb, handle);
1014 
1015         if (orphan_dir) {
1016                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1017                 ocfs2_inode_unlock(orphan_dir, 1);
1018                 inode_unlock(orphan_dir);
1019                 iput(orphan_dir);
1020         }
1021 
1022         if (child_locked)
1023                 ocfs2_inode_unlock(inode, 1);
1024 
1025         ocfs2_inode_unlock(dir, 1);
1026 
1027         brelse(fe_bh);
1028         brelse(parent_node_bh);
1029 
1030         ocfs2_free_dir_lookup_result(&orphan_insert);
1031         ocfs2_free_dir_lookup_result(&lookup);
1032 
1033         if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
1034                 mlog_errno(status);
1035 
1036         return status;
1037 }
1038 
1039 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb,
1040                 u64 src_inode_no, u64 dest_inode_no)
1041 {
1042         int ret = 0, i = 0;
1043         u64 parent_inode_no = 0;
1044         u64 child_inode_no = src_inode_no;
1045         struct inode *child_inode;
1046 
1047 #define MAX_LOOKUP_TIMES 32
1048         while (1) {
1049                 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0);
1050                 if (IS_ERR(child_inode)) {
1051                         ret = PTR_ERR(child_inode);
1052                         break;
1053                 }
1054 
1055                 ret = ocfs2_inode_lock(child_inode, NULL, 0);
1056                 if (ret < 0) {
1057                         iput(child_inode);
1058                         if (ret != -ENOENT)
1059                                 mlog_errno(ret);
1060                         break;
1061                 }
1062 
1063                 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2,
1064                                 &parent_inode_no);
1065                 ocfs2_inode_unlock(child_inode, 0);
1066                 iput(child_inode);
1067                 if (ret < 0) {
1068                         ret = -ENOENT;
1069                         break;
1070                 }
1071 
1072                 if (parent_inode_no == dest_inode_no) {
1073                         ret = 1;
1074                         break;
1075                 }
1076 
1077                 if (parent_inode_no == osb->root_inode->i_ino) {
1078                         ret = 0;
1079                         break;
1080                 }
1081 
1082                 child_inode_no = parent_inode_no;
1083 
1084                 if (++i >= MAX_LOOKUP_TIMES) {
1085                         mlog(ML_NOTICE, "max lookup times reached, filesystem "
1086                                         "may have nested directories, "
1087                                         "src inode: %llu, dest inode: %llu.\n",
1088                                         (unsigned long long)src_inode_no,
1089                                         (unsigned long long)dest_inode_no);
1090                         ret = 0;
1091                         break;
1092                 }
1093         }
1094 
1095         return ret;
1096 }
1097 
1098 /*
1099  * The only place this should be used is rename and link!
1100  * if they have the same id, then the 1st one is the only one locked.
1101  */
1102 static int ocfs2_double_lock(struct ocfs2_super *osb,
1103                              struct buffer_head **bh1,
1104                              struct inode *inode1,
1105                              struct buffer_head **bh2,
1106                              struct inode *inode2,
1107                              int rename)
1108 {
1109         int status;
1110         int inode1_is_ancestor, inode2_is_ancestor;
1111         struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
1112         struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
1113 
1114         trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
1115                                 (unsigned long long)oi2->ip_blkno);
1116 
1117         if (*bh1)
1118                 *bh1 = NULL;
1119         if (*bh2)
1120                 *bh2 = NULL;
1121 
1122         /* we always want to lock the one with the lower lockid first.
1123          * and if they are nested, we lock ancestor first */
1124         if (oi1->ip_blkno != oi2->ip_blkno) {
1125                 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno,
1126                                 oi1->ip_blkno);
1127                 if (inode1_is_ancestor < 0) {
1128                         status = inode1_is_ancestor;
1129                         goto bail;
1130                 }
1131 
1132                 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno,
1133                                 oi2->ip_blkno);
1134                 if (inode2_is_ancestor < 0) {
1135                         status = inode2_is_ancestor;
1136                         goto bail;
1137                 }
1138 
1139                 if ((inode1_is_ancestor == 1) ||
1140                                 (oi1->ip_blkno < oi2->ip_blkno &&
1141                                 inode2_is_ancestor == 0)) {
1142                         /* switch id1 and id2 around */
1143                         swap(bh2, bh1);
1144                         swap(inode2, inode1);
1145                 }
1146                 /* lock id2 */
1147                 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1148                                 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT);
1149                 if (status < 0) {
1150                         if (status != -ENOENT)
1151                                 mlog_errno(status);
1152                         goto bail;
1153                 }
1154         }
1155 
1156         /* lock id1 */
1157         status = ocfs2_inode_lock_nested(inode1, bh1, 1,
1158                         rename == 1 ?  OI_LS_RENAME2 : OI_LS_PARENT);
1159         if (status < 0) {
1160                 /*
1161                  * An error return must mean that no cluster locks
1162                  * were held on function exit.
1163                  */
1164                 if (oi1->ip_blkno != oi2->ip_blkno) {
1165                         ocfs2_inode_unlock(inode2, 1);
1166                         brelse(*bh2);
1167                         *bh2 = NULL;
1168                 }
1169 
1170                 if (status != -ENOENT)
1171                         mlog_errno(status);
1172         }
1173 
1174         trace_ocfs2_double_lock_end(
1175                         (unsigned long long)oi1->ip_blkno,
1176                         (unsigned long long)oi2->ip_blkno);
1177 
1178 bail:
1179         if (status)
1180                 mlog_errno(status);
1181         return status;
1182 }
1183 
1184 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1185 {
1186         ocfs2_inode_unlock(inode1, 1);
1187 
1188         if (inode1 != inode2)
1189                 ocfs2_inode_unlock(inode2, 1);
1190 }
1191 
1192 static int ocfs2_rename(struct inode *old_dir,
1193                         struct dentry *old_dentry,
1194                         struct inode *new_dir,
1195                         struct dentry *new_dentry,
1196                         unsigned int flags)
1197 {
1198         int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1199         int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1200         struct inode *old_inode = d_inode(old_dentry);
1201         struct inode *new_inode = d_inode(new_dentry);
1202         struct inode *orphan_dir = NULL;
1203         struct ocfs2_dinode *newfe = NULL;
1204         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1205         struct buffer_head *newfe_bh = NULL;
1206         struct buffer_head *old_inode_bh = NULL;
1207         struct ocfs2_super *osb = NULL;
1208         u64 newfe_blkno, old_de_ino;
1209         handle_t *handle = NULL;
1210         struct buffer_head *old_dir_bh = NULL;
1211         struct buffer_head *new_dir_bh = NULL;
1212         u32 old_dir_nlink = old_dir->i_nlink;
1213         struct ocfs2_dinode *old_di;
1214         struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1215         struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1216         struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1217         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1218         struct ocfs2_dir_lookup_result target_insert = { NULL, };
1219         bool should_add_orphan = false;
1220 
1221         if (flags)
1222                 return -EINVAL;
1223 
1224         /* At some point it might be nice to break this function up a
1225          * bit. */
1226 
1227         trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1228                            old_dentry->d_name.len, old_dentry->d_name.name,
1229                            new_dentry->d_name.len, new_dentry->d_name.name);
1230 
1231         status = dquot_initialize(old_dir);
1232         if (status) {
1233                 mlog_errno(status);
1234                 goto bail;
1235         }
1236         status = dquot_initialize(new_dir);
1237         if (status) {
1238                 mlog_errno(status);
1239                 goto bail;
1240         }
1241 
1242         osb = OCFS2_SB(old_dir->i_sb);
1243 
1244         if (new_inode) {
1245                 if (!igrab(new_inode))
1246                         BUG();
1247         }
1248 
1249         /* Assume a directory hierarchy thusly:
1250          * a/b/c
1251          * a/d
1252          * a,b,c, and d are all directories.
1253          *
1254          * from cwd of 'a' on both nodes:
1255          * node1: mv b/c d
1256          * node2: mv d   b/c
1257          *
1258          * And that's why, just like the VFS, we need a file system
1259          * rename lock. */
1260         if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1261                 status = ocfs2_rename_lock(osb);
1262                 if (status < 0) {
1263                         mlog_errno(status);
1264                         goto bail;
1265                 }
1266                 rename_lock = 1;
1267 
1268                 /* here we cannot guarantee the inodes haven't just been
1269                  * changed, so check if they are nested again */
1270                 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino,
1271                                 old_inode->i_ino);
1272                 if (status < 0) {
1273                         mlog_errno(status);
1274                         goto bail;
1275                 } else if (status == 1) {
1276                         status = -EPERM;
1277                         trace_ocfs2_rename_not_permitted(
1278                                         (unsigned long long)old_inode->i_ino,
1279                                         (unsigned long long)new_dir->i_ino);
1280                         goto bail;
1281                 }
1282         }
1283 
1284         /* if old and new are the same, this'll just do one lock. */
1285         status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1286                                    &new_dir_bh, new_dir, 1);
1287         if (status < 0) {
1288                 mlog_errno(status);
1289                 goto bail;
1290         }
1291         parents_locked = 1;
1292 
1293         if (!new_dir->i_nlink) {
1294                 status = -EACCES;
1295                 goto bail;
1296         }
1297 
1298         /* make sure both dirs have bhs
1299          * get an extra ref on old_dir_bh if old==new */
1300         if (!new_dir_bh) {
1301                 if (old_dir_bh) {
1302                         new_dir_bh = old_dir_bh;
1303                         get_bh(new_dir_bh);
1304                 } else {
1305                         mlog(ML_ERROR, "no old_dir_bh!\n");
1306                         status = -EIO;
1307                         goto bail;
1308                 }
1309         }
1310 
1311         /*
1312          * Aside from allowing a meta data update, the locking here
1313          * also ensures that the downconvert thread on other nodes
1314          * won't have to concurrently downconvert the inode and the
1315          * dentry locks.
1316          */
1317         status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1318                                          OI_LS_PARENT);
1319         if (status < 0) {
1320                 if (status != -ENOENT)
1321                         mlog_errno(status);
1322                 goto bail;
1323         }
1324         old_child_locked = 1;
1325 
1326         status = ocfs2_remote_dentry_delete(old_dentry);
1327         if (status < 0) {
1328                 mlog_errno(status);
1329                 goto bail;
1330         }
1331 
1332         if (S_ISDIR(old_inode->i_mode)) {
1333                 u64 old_inode_parent;
1334 
1335                 update_dot_dot = 1;
1336                 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1337                                                   old_inode,
1338                                                   &old_inode_dot_dot_res);
1339                 if (status) {
1340                         status = -EIO;
1341                         goto bail;
1342                 }
1343 
1344                 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1345                         status = -EIO;
1346                         goto bail;
1347                 }
1348 
1349                 if (!new_inode && new_dir != old_dir &&
1350                     new_dir->i_nlink >= ocfs2_link_max(osb)) {
1351                         status = -EMLINK;
1352                         goto bail;
1353                 }
1354         }
1355 
1356         status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1357                                             old_dentry->d_name.len,
1358                                             &old_de_ino);
1359         if (status) {
1360                 status = -ENOENT;
1361                 goto bail;
1362         }
1363 
1364         /*
1365          *  Check for inode number is _not_ due to possible IO errors.
1366          *  We might rmdir the source, keep it as pwd of some process
1367          *  and merrily kill the link to whatever was created under the
1368          *  same name. Goodbye sticky bit ;-<
1369          */
1370         if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1371                 status = -ENOENT;
1372                 goto bail;
1373         }
1374 
1375         /* check if the target already exists (in which case we need
1376          * to delete it */
1377         status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1378                                           new_dentry->d_name.len,
1379                                           &newfe_blkno, new_dir,
1380                                           &target_lookup_res);
1381         /* The only error we allow here is -ENOENT because the new
1382          * file not existing is perfectly valid. */
1383         if ((status < 0) && (status != -ENOENT)) {
1384                 /* If we cannot find the file specified we should just */
1385                 /* return the error... */
1386                 mlog_errno(status);
1387                 goto bail;
1388         }
1389         if (status == 0)
1390                 target_exists = 1;
1391 
1392         if (!target_exists && new_inode) {
1393                 /*
1394                  * Target was unlinked by another node while we were
1395                  * waiting to get to ocfs2_rename(). There isn't
1396                  * anything we can do here to help the situation, so
1397                  * bubble up the appropriate error.
1398                  */
1399                 status = -ENOENT;
1400                 goto bail;
1401         }
1402 
1403         /* In case we need to overwrite an existing file, we blow it
1404          * away first */
1405         if (target_exists) {
1406                 /* VFS didn't think there existed an inode here, but
1407                  * someone else in the cluster must have raced our
1408                  * rename to create one. Today we error cleanly, in
1409                  * the future we should consider calling iget to build
1410                  * a new struct inode for this entry. */
1411                 if (!new_inode) {
1412                         status = -EACCES;
1413 
1414                         trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1415                                                 new_dentry->d_name.name);
1416                         goto bail;
1417                 }
1418 
1419                 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1420                         status = -EACCES;
1421 
1422                         trace_ocfs2_rename_disagree(
1423                              (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1424                              (unsigned long long)newfe_blkno,
1425                              OCFS2_I(new_inode)->ip_flags);
1426                         goto bail;
1427                 }
1428 
1429                 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1430                 if (status < 0) {
1431                         if (status != -ENOENT)
1432                                 mlog_errno(status);
1433                         goto bail;
1434                 }
1435                 new_child_locked = 1;
1436 
1437                 status = ocfs2_remote_dentry_delete(new_dentry);
1438                 if (status < 0) {
1439                         mlog_errno(status);
1440                         goto bail;
1441                 }
1442 
1443                 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1444 
1445                 trace_ocfs2_rename_over_existing(
1446                      (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1447                      (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1448 
1449                 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1450                         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1451                                                 OCFS2_I(new_inode)->ip_blkno,
1452                                                 orphan_name, &orphan_insert,
1453                                                 false);
1454                         if (status < 0) {
1455                                 mlog_errno(status);
1456                                 goto bail;
1457                         }
1458                         should_add_orphan = true;
1459                 }
1460         } else {
1461                 BUG_ON(d_inode(new_dentry->d_parent) != new_dir);
1462 
1463                 status = ocfs2_check_dir_for_entry(new_dir,
1464                                                    new_dentry->d_name.name,
1465                                                    new_dentry->d_name.len);
1466                 if (status)
1467                         goto bail;
1468 
1469                 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1470                                                       new_dentry->d_name.name,
1471                                                       new_dentry->d_name.len,
1472                                                       &target_insert);
1473                 if (status < 0) {
1474                         mlog_errno(status);
1475                         goto bail;
1476                 }
1477         }
1478 
1479         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1480         if (IS_ERR(handle)) {
1481                 status = PTR_ERR(handle);
1482                 handle = NULL;
1483                 mlog_errno(status);
1484                 goto bail;
1485         }
1486 
1487         if (target_exists) {
1488                 if (S_ISDIR(new_inode->i_mode)) {
1489                         if (new_inode->i_nlink != 2 ||
1490                             !ocfs2_empty_dir(new_inode)) {
1491                                 status = -ENOTEMPTY;
1492                                 goto bail;
1493                         }
1494                 }
1495                 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1496                                                  newfe_bh,
1497                                                  OCFS2_JOURNAL_ACCESS_WRITE);
1498                 if (status < 0) {
1499                         mlog_errno(status);
1500                         goto bail;
1501                 }
1502 
1503                 /* change the dirent to point to the correct inode */
1504                 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1505                                             old_inode);
1506                 if (status < 0) {
1507                         mlog_errno(status);
1508                         goto bail;
1509                 }
1510                 inode_inc_iversion(new_dir);
1511 
1512                 if (S_ISDIR(new_inode->i_mode))
1513                         ocfs2_set_links_count(newfe, 0);
1514                 else
1515                         ocfs2_add_links_count(newfe, -1);
1516                 ocfs2_journal_dirty(handle, newfe_bh);
1517                 if (should_add_orphan) {
1518                         status = ocfs2_orphan_add(osb, handle, new_inode,
1519                                         newfe_bh, orphan_name,
1520                                         &orphan_insert, orphan_dir, false);
1521                         if (status < 0) {
1522                                 mlog_errno(status);
1523                                 goto bail;
1524                         }
1525                 }
1526         } else {
1527                 /* if the name was not found in new_dir, add it now */
1528                 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1529                                          OCFS2_I(old_inode)->ip_blkno,
1530                                          new_dir_bh, &target_insert);
1531         }
1532 
1533         old_inode->i_ctime = current_time(old_inode);
1534         mark_inode_dirty(old_inode);
1535 
1536         status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1537                                          old_inode_bh,
1538                                          OCFS2_JOURNAL_ACCESS_WRITE);
1539         if (status >= 0) {
1540                 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1541 
1542                 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1543                 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1544                 ocfs2_journal_dirty(handle, old_inode_bh);
1545         } else
1546                 mlog_errno(status);
1547 
1548         /*
1549          * Now that the name has been added to new_dir, remove the old name.
1550          *
1551          * We don't keep any directory entry context around until now
1552          * because the insert might have changed the type of directory
1553          * we're dealing with.
1554          */
1555         status = ocfs2_find_entry(old_dentry->d_name.name,
1556                                   old_dentry->d_name.len, old_dir,
1557                                   &old_entry_lookup);
1558         if (status) {
1559                 if (!is_journal_aborted(osb->journal->j_journal)) {
1560                         ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1561                                         "is not deleted.",
1562                                         new_dentry->d_name.len, new_dentry->d_name.name,
1563                                         old_dentry->d_name.len, old_dentry->d_name.name);
1564                 }
1565                 goto bail;
1566         }
1567 
1568         status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1569         if (status < 0) {
1570                 mlog_errno(status);
1571                 if (!is_journal_aborted(osb->journal->j_journal)) {
1572                         ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1573                                         "is not deleted.",
1574                                         new_dentry->d_name.len, new_dentry->d_name.name,
1575                                         old_dentry->d_name.len, old_dentry->d_name.name);
1576                 }
1577                 goto bail;
1578         }
1579 
1580         if (new_inode) {
1581                 drop_nlink(new_inode);
1582                 new_inode->i_ctime = current_time(new_inode);
1583         }
1584         old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir);
1585 
1586         if (update_dot_dot) {
1587                 status = ocfs2_update_entry(old_inode, handle,
1588                                             &old_inode_dot_dot_res, new_dir);
1589                 drop_nlink(old_dir);
1590                 if (new_inode) {
1591                         drop_nlink(new_inode);
1592                 } else {
1593                         inc_nlink(new_dir);
1594                         mark_inode_dirty(new_dir);
1595                 }
1596         }
1597         mark_inode_dirty(old_dir);
1598         ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1599         if (new_inode) {
1600                 mark_inode_dirty(new_inode);
1601                 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1602         }
1603 
1604         if (old_dir != new_dir) {
1605                 /* Keep the same times on both directories.*/
1606                 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1607 
1608                 /*
1609                  * This will also pick up the i_nlink change from the
1610                  * block above.
1611                  */
1612                 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1613         }
1614 
1615         if (old_dir_nlink != old_dir->i_nlink) {
1616                 if (!old_dir_bh) {
1617                         mlog(ML_ERROR, "need to change nlink for old dir "
1618                              "%llu from %d to %d but bh is NULL!\n",
1619                              (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1620                              (int)old_dir_nlink, old_dir->i_nlink);
1621                 } else {
1622                         struct ocfs2_dinode *fe;
1623                         status = ocfs2_journal_access_di(handle,
1624                                                          INODE_CACHE(old_dir),
1625                                                          old_dir_bh,
1626                                                          OCFS2_JOURNAL_ACCESS_WRITE);
1627                         fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1628                         ocfs2_set_links_count(fe, old_dir->i_nlink);
1629                         ocfs2_journal_dirty(handle, old_dir_bh);
1630                 }
1631         }
1632         ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1633         status = 0;
1634 bail:
1635         if (handle)
1636                 ocfs2_commit_trans(osb, handle);
1637 
1638         if (orphan_dir) {
1639                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1640                 ocfs2_inode_unlock(orphan_dir, 1);
1641                 inode_unlock(orphan_dir);
1642                 iput(orphan_dir);
1643         }
1644 
1645         if (new_child_locked)
1646                 ocfs2_inode_unlock(new_inode, 1);
1647 
1648         if (old_child_locked)
1649                 ocfs2_inode_unlock(old_inode, 1);
1650 
1651         if (parents_locked)
1652                 ocfs2_double_unlock(old_dir, new_dir);
1653 
1654         if (rename_lock)
1655                 ocfs2_rename_unlock(osb);
1656 
1657         if (new_inode)
1658                 sync_mapping_buffers(old_inode->i_mapping);
1659 
1660         iput(new_inode);
1661 
1662         ocfs2_free_dir_lookup_result(&target_lookup_res);
1663         ocfs2_free_dir_lookup_result(&old_entry_lookup);
1664         ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1665         ocfs2_free_dir_lookup_result(&orphan_insert);
1666         ocfs2_free_dir_lookup_result(&target_insert);
1667 
1668         brelse(newfe_bh);
1669         brelse(old_inode_bh);
1670         brelse(old_dir_bh);
1671         brelse(new_dir_bh);
1672 
1673         if (status)
1674                 mlog_errno(status);
1675 
1676         return status;
1677 }
1678 
1679 /*
1680  * we expect i_size = strlen(symname). Copy symname into the file
1681  * data, including the null terminator.
1682  */
1683 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1684                                      handle_t *handle,
1685                                      struct inode *inode,
1686                                      const char *symname)
1687 {
1688         struct buffer_head **bhs = NULL;
1689         const char *c;
1690         struct super_block *sb = osb->sb;
1691         u64 p_blkno, p_blocks;
1692         int virtual, blocks, status, i, bytes_left;
1693 
1694         bytes_left = i_size_read(inode) + 1;
1695         /* we can't trust i_blocks because we're actually going to
1696          * write i_size + 1 bytes. */
1697         blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1698 
1699         trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1700                                         i_size_read(inode), blocks);
1701 
1702         /* Sanity check -- make sure we're going to fit. */
1703         if (bytes_left >
1704             ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1705                 status = -EIO;
1706                 mlog_errno(status);
1707                 goto bail;
1708         }
1709 
1710         bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1711         if (!bhs) {
1712                 status = -ENOMEM;
1713                 mlog_errno(status);
1714                 goto bail;
1715         }
1716 
1717         status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1718                                              NULL);
1719         if (status < 0) {
1720                 mlog_errno(status);
1721                 goto bail;
1722         }
1723 
1724         /* links can never be larger than one cluster so we know this
1725          * is all going to be contiguous, but do a sanity check
1726          * anyway. */
1727         if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1728                 status = -EIO;
1729                 mlog_errno(status);
1730                 goto bail;
1731         }
1732 
1733         virtual = 0;
1734         while(bytes_left > 0) {
1735                 c = &symname[virtual * sb->s_blocksize];
1736 
1737                 bhs[virtual] = sb_getblk(sb, p_blkno);
1738                 if (!bhs[virtual]) {
1739                         status = -ENOMEM;
1740                         mlog_errno(status);
1741                         goto bail;
1742                 }
1743                 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1744                                               bhs[virtual]);
1745 
1746                 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1747                                               bhs[virtual],
1748                                               OCFS2_JOURNAL_ACCESS_CREATE);
1749                 if (status < 0) {
1750                         mlog_errno(status);
1751                         goto bail;
1752                 }
1753 
1754                 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1755 
1756                 memcpy(bhs[virtual]->b_data, c,
1757                        (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1758                        bytes_left);
1759 
1760                 ocfs2_journal_dirty(handle, bhs[virtual]);
1761 
1762                 virtual++;
1763                 p_blkno++;
1764                 bytes_left -= sb->s_blocksize;
1765         }
1766 
1767         status = 0;
1768 bail:
1769 
1770         if (bhs) {
1771                 for(i = 0; i < blocks; i++)
1772                         brelse(bhs[i]);
1773                 kfree(bhs);
1774         }
1775 
1776         if (status)
1777                 mlog_errno(status);
1778         return status;
1779 }
1780 
1781 static int ocfs2_symlink(struct inode *dir,
1782                          struct dentry *dentry,
1783                          const char *symname)
1784 {
1785         int status, l, credits;
1786         u64 newsize;
1787         struct ocfs2_super *osb = NULL;
1788         struct inode *inode = NULL;
1789         struct super_block *sb;
1790         struct buffer_head *new_fe_bh = NULL;
1791         struct buffer_head *parent_fe_bh = NULL;
1792         struct ocfs2_dinode *fe = NULL;
1793         struct ocfs2_dinode *dirfe;
1794         handle_t *handle = NULL;
1795         struct ocfs2_alloc_context *inode_ac = NULL;
1796         struct ocfs2_alloc_context *data_ac = NULL;
1797         struct ocfs2_alloc_context *xattr_ac = NULL;
1798         int want_clusters = 0;
1799         int xattr_credits = 0;
1800         struct ocfs2_security_xattr_info si = {
1801                 .enable = 1,
1802         };
1803         int did_quota = 0, did_quota_inode = 0;
1804         struct ocfs2_dir_lookup_result lookup = { NULL, };
1805         sigset_t oldset;
1806         int did_block_signals = 0;
1807         struct ocfs2_dentry_lock *dl = NULL;
1808 
1809         trace_ocfs2_symlink_begin(dir, dentry, symname,
1810                                   dentry->d_name.len, dentry->d_name.name);
1811 
1812         status = dquot_initialize(dir);
1813         if (status) {
1814                 mlog_errno(status);
1815                 goto bail;
1816         }
1817 
1818         sb = dir->i_sb;
1819         osb = OCFS2_SB(sb);
1820 
1821         l = strlen(symname) + 1;
1822 
1823         credits = ocfs2_calc_symlink_credits(sb);
1824 
1825         /* lock the parent directory */
1826         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1827         if (status < 0) {
1828                 if (status != -ENOENT)
1829                         mlog_errno(status);
1830                 return status;
1831         }
1832 
1833         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1834         if (!ocfs2_read_links_count(dirfe)) {
1835                 /* can't make a file in a deleted directory. */
1836                 status = -ENOENT;
1837                 goto bail;
1838         }
1839 
1840         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1841                                            dentry->d_name.len);
1842         if (status)
1843                 goto bail;
1844 
1845         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1846                                               dentry->d_name.name,
1847                                               dentry->d_name.len, &lookup);
1848         if (status < 0) {
1849                 mlog_errno(status);
1850                 goto bail;
1851         }
1852 
1853         status = ocfs2_reserve_new_inode(osb, &inode_ac);
1854         if (status < 0) {
1855                 if (status != -ENOSPC)
1856                         mlog_errno(status);
1857                 goto bail;
1858         }
1859 
1860         inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1861         if (IS_ERR(inode)) {
1862                 status = PTR_ERR(inode);
1863                 inode = NULL;
1864                 mlog_errno(status);
1865                 goto bail;
1866         }
1867 
1868         /* get security xattr */
1869         status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1870         if (status) {
1871                 if (status == -EOPNOTSUPP)
1872                         si.enable = 0;
1873                 else {
1874                         mlog_errno(status);
1875                         goto bail;
1876                 }
1877         }
1878 
1879         /* calculate meta data/clusters for setting security xattr */
1880         if (si.enable) {
1881                 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1882                                                   &xattr_credits, &xattr_ac);
1883                 if (status < 0) {
1884                         mlog_errno(status);
1885                         goto bail;
1886                 }
1887         }
1888 
1889         /* don't reserve bitmap space for fast symlinks. */
1890         if (l > ocfs2_fast_symlink_chars(sb))
1891                 want_clusters += 1;
1892 
1893         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1894         if (status < 0) {
1895                 if (status != -ENOSPC)
1896                         mlog_errno(status);
1897                 goto bail;
1898         }
1899 
1900         handle = ocfs2_start_trans(osb, credits + xattr_credits);
1901         if (IS_ERR(handle)) {
1902                 status = PTR_ERR(handle);
1903                 handle = NULL;
1904                 mlog_errno(status);
1905                 goto bail;
1906         }
1907 
1908         /* Starting to change things, restart is no longer possible. */
1909         ocfs2_block_signals(&oldset);
1910         did_block_signals = 1;
1911 
1912         status = dquot_alloc_inode(inode);
1913         if (status)
1914                 goto bail;
1915         did_quota_inode = 1;
1916 
1917         trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1918                                    dentry->d_name.name,
1919                                    (unsigned long long)OCFS2_I(dir)->ip_blkno,
1920                                    inode->i_mode);
1921 
1922         status = ocfs2_mknod_locked(osb, dir, inode,
1923                                     0, &new_fe_bh, parent_fe_bh, handle,
1924                                     inode_ac);
1925         if (status < 0) {
1926                 mlog_errno(status);
1927                 goto bail;
1928         }
1929 
1930         fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1931         inode->i_rdev = 0;
1932         newsize = l - 1;
1933         inode->i_op = &ocfs2_symlink_inode_operations;
1934         inode_nohighmem(inode);
1935         if (l > ocfs2_fast_symlink_chars(sb)) {
1936                 u32 offset = 0;
1937 
1938                 status = dquot_alloc_space_nodirty(inode,
1939                     ocfs2_clusters_to_bytes(osb->sb, 1));
1940                 if (status)
1941                         goto bail;
1942                 did_quota = 1;
1943                 inode->i_mapping->a_ops = &ocfs2_aops;
1944                 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1945                                               new_fe_bh,
1946                                               handle, data_ac, NULL,
1947                                               NULL);
1948                 if (status < 0) {
1949                         if (status != -ENOSPC && status != -EINTR) {
1950                                 mlog(ML_ERROR,
1951                                      "Failed to extend file to %llu\n",
1952                                      (unsigned long long)newsize);
1953                                 mlog_errno(status);
1954                                 status = -ENOSPC;
1955                         }
1956                         goto bail;
1957                 }
1958                 i_size_write(inode, newsize);
1959                 inode->i_blocks = ocfs2_inode_sector_count(inode);
1960         } else {
1961                 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1962                 memcpy((char *) fe->id2.i_symlink, symname, l);
1963                 i_size_write(inode, newsize);
1964                 inode->i_blocks = 0;
1965         }
1966 
1967         status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1968         if (status < 0) {
1969                 mlog_errno(status);
1970                 goto bail;
1971         }
1972 
1973         if (!ocfs2_inode_is_fast_symlink(inode)) {
1974                 status = ocfs2_create_symlink_data(osb, handle, inode,
1975                                                    symname);
1976                 if (status < 0) {
1977                         mlog_errno(status);
1978                         goto bail;
1979                 }
1980         }
1981 
1982         if (si.enable) {
1983                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1984                                                  xattr_ac, data_ac);
1985                 if (status < 0) {
1986                         mlog_errno(status);
1987                         goto bail;
1988                 }
1989         }
1990 
1991         /*
1992          * Do this before adding the entry to the directory. We add
1993          * also set d_op after success so that ->d_iput() will cleanup
1994          * the dentry lock even if ocfs2_add_entry() fails below.
1995          */
1996         status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1997         if (status) {
1998                 mlog_errno(status);
1999                 goto bail;
2000         }
2001 
2002         dl = dentry->d_fsdata;
2003 
2004         status = ocfs2_add_entry(handle, dentry, inode,
2005                                  le64_to_cpu(fe->i_blkno), parent_fe_bh,
2006                                  &lookup);
2007         if (status < 0) {
2008                 mlog_errno(status);
2009                 goto bail;
2010         }
2011 
2012         insert_inode_hash(inode);
2013         d_instantiate(dentry, inode);
2014 bail:
2015         if (status < 0 && did_quota)
2016                 dquot_free_space_nodirty(inode,
2017                                         ocfs2_clusters_to_bytes(osb->sb, 1));
2018         if (status < 0 && did_quota_inode)
2019                 dquot_free_inode(inode);
2020         if (handle)
2021                 ocfs2_commit_trans(osb, handle);
2022 
2023         ocfs2_inode_unlock(dir, 1);
2024         if (did_block_signals)
2025                 ocfs2_unblock_signals(&oldset);
2026 
2027         brelse(new_fe_bh);
2028         brelse(parent_fe_bh);
2029         kfree(si.value);
2030         ocfs2_free_dir_lookup_result(&lookup);
2031         if (inode_ac)
2032                 ocfs2_free_alloc_context(inode_ac);
2033         if (data_ac)
2034                 ocfs2_free_alloc_context(data_ac);
2035         if (xattr_ac)
2036                 ocfs2_free_alloc_context(xattr_ac);
2037         if ((status < 0) && inode) {
2038                 if (dl)
2039                         ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2040 
2041                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
2042                 clear_nlink(inode);
2043                 iput(inode);
2044         }
2045 
2046         if (status)
2047                 mlog_errno(status);
2048 
2049         return status;
2050 }
2051 
2052 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2053 {
2054         int status, namelen;
2055 
2056         namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2057                            (long long)blkno);
2058         if (namelen <= 0) {
2059                 if (namelen)
2060                         status = namelen;
2061                 else
2062                         status = -EINVAL;
2063                 mlog_errno(status);
2064                 goto bail;
2065         }
2066         if (namelen != OCFS2_ORPHAN_NAMELEN) {
2067                 status = -EINVAL;
2068                 mlog_errno(status);
2069                 goto bail;
2070         }
2071 
2072         trace_ocfs2_blkno_stringify(blkno, name, namelen);
2073 
2074         status = 0;
2075 bail:
2076         if (status < 0)
2077                 mlog_errno(status);
2078         return status;
2079 }
2080 
2081 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2082                                         struct inode **ret_orphan_dir,
2083                                         struct buffer_head **ret_orphan_dir_bh)
2084 {
2085         struct inode *orphan_dir_inode;
2086         struct buffer_head *orphan_dir_bh = NULL;
2087         int ret = 0;
2088 
2089         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2090                                                        ORPHAN_DIR_SYSTEM_INODE,
2091                                                        osb->slot_num);
2092         if (!orphan_dir_inode) {
2093                 ret = -ENOENT;
2094                 mlog_errno(ret);
2095                 return ret;
2096         }
2097 
2098         inode_lock(orphan_dir_inode);
2099 
2100         ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2101         if (ret < 0) {
2102                 inode_unlock(orphan_dir_inode);
2103                 iput(orphan_dir_inode);
2104 
2105                 mlog_errno(ret);
2106                 return ret;
2107         }
2108 
2109         *ret_orphan_dir = orphan_dir_inode;
2110         *ret_orphan_dir_bh = orphan_dir_bh;
2111 
2112         return 0;
2113 }
2114 
2115 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2116                                       struct buffer_head *orphan_dir_bh,
2117                                       u64 blkno,
2118                                       char *name,
2119                                       struct ocfs2_dir_lookup_result *lookup,
2120                                       bool dio)
2121 {
2122         int ret;
2123         struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2124         int namelen = dio ?
2125                         (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2126                         OCFS2_ORPHAN_NAMELEN;
2127 
2128         if (dio) {
2129                 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2130                                 OCFS2_DIO_ORPHAN_PREFIX);
2131                 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2132                         ret = -EINVAL;
2133                         mlog_errno(ret);
2134                         return ret;
2135                 }
2136 
2137                 ret = ocfs2_blkno_stringify(blkno,
2138                                 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2139         } else
2140                 ret = ocfs2_blkno_stringify(blkno, name);
2141         if (ret < 0) {
2142                 mlog_errno(ret);
2143                 return ret;
2144         }
2145 
2146         ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2147                                            orphan_dir_bh, name,
2148                                            namelen, lookup);
2149         if (ret < 0) {
2150                 mlog_errno(ret);
2151                 return ret;
2152         }
2153 
2154         return 0;
2155 }
2156 
2157 /**
2158  * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2159  * insertion of an orphan.
2160  * @osb: ocfs2 file system
2161  * @ret_orphan_dir: Orphan dir inode - returned locked!
2162  * @blkno: Actual block number of the inode to be inserted into orphan dir.
2163  * @lookup: dir lookup result, to be passed back into functions like
2164  *          ocfs2_orphan_add
2165  *
2166  * Returns zero on success and the ret_orphan_dir, name and lookup
2167  * fields will be populated.
2168  *
2169  * Returns non-zero on failure. 
2170  */
2171 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2172                                     struct inode **ret_orphan_dir,
2173                                     u64 blkno,
2174                                     char *name,
2175                                     struct ocfs2_dir_lookup_result *lookup,
2176                                     bool dio)
2177 {
2178         struct inode *orphan_dir_inode = NULL;
2179         struct buffer_head *orphan_dir_bh = NULL;
2180         int ret = 0;
2181 
2182         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2183                                            &orphan_dir_bh);
2184         if (ret < 0) {
2185                 mlog_errno(ret);
2186                 return ret;
2187         }
2188 
2189         ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2190                                          blkno, name, lookup, dio);
2191         if (ret < 0) {
2192                 mlog_errno(ret);
2193                 goto out;
2194         }
2195 
2196         *ret_orphan_dir = orphan_dir_inode;
2197 
2198 out:
2199         brelse(orphan_dir_bh);
2200 
2201         if (ret) {
2202                 ocfs2_inode_unlock(orphan_dir_inode, 1);
2203                 inode_unlock(orphan_dir_inode);
2204                 iput(orphan_dir_inode);
2205         }
2206 
2207         if (ret)
2208                 mlog_errno(ret);
2209         return ret;
2210 }
2211 
2212 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2213                             handle_t *handle,
2214                             struct inode *inode,
2215                             struct buffer_head *fe_bh,
2216                             char *name,
2217                             struct ocfs2_dir_lookup_result *lookup,
2218                             struct inode *orphan_dir_inode,
2219                             bool dio)
2220 {
2221         struct buffer_head *orphan_dir_bh = NULL;
2222         int status = 0;
2223         struct ocfs2_dinode *orphan_fe;
2224         struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2225         int namelen = dio ?
2226                         (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2227                         OCFS2_ORPHAN_NAMELEN;
2228 
2229         trace_ocfs2_orphan_add_begin(
2230                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2231 
2232         status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2233         if (status < 0) {
2234                 mlog_errno(status);
2235                 goto leave;
2236         }
2237 
2238         status = ocfs2_journal_access_di(handle,
2239                                          INODE_CACHE(orphan_dir_inode),
2240                                          orphan_dir_bh,
2241                                          OCFS2_JOURNAL_ACCESS_WRITE);
2242         if (status < 0) {
2243                 mlog_errno(status);
2244                 goto leave;
2245         }
2246 
2247         /*
2248          * We're going to journal the change of i_flags and i_orphaned_slot.
2249          * It's safe anyway, though some callers may duplicate the journaling.
2250          * Journaling within the func just make the logic look more
2251          * straightforward.
2252          */
2253         status = ocfs2_journal_access_di(handle,
2254                                          INODE_CACHE(inode),
2255                                          fe_bh,
2256                                          OCFS2_JOURNAL_ACCESS_WRITE);
2257         if (status < 0) {
2258                 mlog_errno(status);
2259                 goto leave;
2260         }
2261 
2262         /* we're a cluster, and nlink can change on disk from
2263          * underneath us... */
2264         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2265         if (S_ISDIR(inode->i_mode))
2266                 ocfs2_add_links_count(orphan_fe, 1);
2267         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2268         ocfs2_journal_dirty(handle, orphan_dir_bh);
2269 
2270         status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2271                                    namelen, inode,
2272                                    OCFS2_I(inode)->ip_blkno,
2273                                    orphan_dir_bh, lookup);
2274         if (status < 0) {
2275                 mlog_errno(status);
2276                 goto rollback;
2277         }
2278 
2279         if (dio) {
2280                 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan
2281                  * slot.
2282                  */
2283                 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2284                 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num);
2285         } else {
2286                 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2287                 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2288 
2289                 /* Record which orphan dir our inode now resides
2290                  * in. delete_inode will use this to determine which orphan
2291                  * dir to lock. */
2292                 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2293         }
2294 
2295         ocfs2_journal_dirty(handle, fe_bh);
2296 
2297         trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2298                                    osb->slot_num);
2299 
2300 rollback:
2301         if (status < 0) {
2302                 if (S_ISDIR(inode->i_mode))
2303                         ocfs2_add_links_count(orphan_fe, -1);
2304                 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2305         }
2306 
2307 leave:
2308         brelse(orphan_dir_bh);
2309 
2310         return status;
2311 }
2312 
2313 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2314 int ocfs2_orphan_del(struct ocfs2_super *osb,
2315                      handle_t *handle,
2316                      struct inode *orphan_dir_inode,
2317                      struct inode *inode,
2318                      struct buffer_head *orphan_dir_bh,
2319                      bool dio)
2320 {
2321         char name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2322         struct ocfs2_dinode *orphan_fe;
2323         int status = 0;
2324         struct ocfs2_dir_lookup_result lookup = { NULL, };
2325 
2326         if (dio) {
2327                 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2328                                 OCFS2_DIO_ORPHAN_PREFIX);
2329                 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2330                         status = -EINVAL;
2331                         mlog_errno(status);
2332                         return status;
2333                 }
2334 
2335                 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno,
2336                                 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2337         } else
2338                 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2339         if (status < 0) {
2340                 mlog_errno(status);
2341                 goto leave;
2342         }
2343 
2344         trace_ocfs2_orphan_del(
2345              (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2346              name, strlen(name));
2347 
2348         status = ocfs2_journal_access_di(handle,
2349                                          INODE_CACHE(orphan_dir_inode),
2350                                          orphan_dir_bh,
2351                                          OCFS2_JOURNAL_ACCESS_WRITE);
2352         if (status < 0) {
2353                 mlog_errno(status);
2354                 goto leave;
2355         }
2356 
2357         /* find it's spot in the orphan directory */
2358         status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode,
2359                                   &lookup);
2360         if (status) {
2361                 mlog_errno(status);
2362                 goto leave;
2363         }
2364 
2365         /* remove it from the orphan directory */
2366         status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2367         if (status < 0) {
2368                 mlog_errno(status);
2369                 goto leave;
2370         }
2371 
2372         /* do the i_nlink dance! :) */
2373         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2374         if (S_ISDIR(inode->i_mode))
2375                 ocfs2_add_links_count(orphan_fe, -1);
2376         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2377         ocfs2_journal_dirty(handle, orphan_dir_bh);
2378 
2379 leave:
2380         ocfs2_free_dir_lookup_result(&lookup);
2381 
2382         if (status)
2383                 mlog_errno(status);
2384         return status;
2385 }
2386 
2387 /**
2388  * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2389  * allocated file. This is different from the typical 'add to orphan dir'
2390  * operation in that the inode does not yet exist. This is a problem because
2391  * the orphan dir stringifies the inode block number to come up with it's
2392  * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2393  * problem. This function works around it by calling deeper into the orphan
2394  * and suballoc code than other callers. Use this only by necessity.
2395  * @dir: The directory which this inode will ultimately wind up under - not the
2396  * orphan dir!
2397  * @dir_bh: buffer_head the @dir inode block
2398  * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2399  * with the string to be used for orphan dirent. Pass back to the orphan dir
2400  * code.
2401  * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2402  * dir code.
2403  * @ret_di_blkno: block number where the new inode will be allocated.
2404  * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2405  * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2406  *
2407  * Returns zero on success and the ret_orphan_dir, name and lookup
2408  * fields will be populated.
2409  *
2410  * Returns non-zero on failure. 
2411  */
2412 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2413                                         struct buffer_head *dir_bh,
2414                                         char *orphan_name,
2415                                         struct inode **ret_orphan_dir,
2416                                         u64 *ret_di_blkno,
2417                                         struct ocfs2_dir_lookup_result *orphan_insert,
2418                                         struct ocfs2_alloc_context **ret_inode_ac)
2419 {
2420         int ret;
2421         u64 di_blkno;
2422         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2423         struct inode *orphan_dir = NULL;
2424         struct buffer_head *orphan_dir_bh = NULL;
2425         struct ocfs2_alloc_context *inode_ac = NULL;
2426 
2427         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2428         if (ret < 0) {
2429                 mlog_errno(ret);
2430                 return ret;
2431         }
2432 
2433         /* reserve an inode spot */
2434         ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2435         if (ret < 0) {
2436                 if (ret != -ENOSPC)
2437                         mlog_errno(ret);
2438                 goto out;
2439         }
2440 
2441         ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2442                                        &di_blkno);
2443         if (ret) {
2444                 mlog_errno(ret);
2445                 goto out;
2446         }
2447 
2448         ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2449                                          di_blkno, orphan_name, orphan_insert,
2450                                          false);
2451         if (ret < 0) {
2452                 mlog_errno(ret);
2453                 goto out;
2454         }
2455 
2456 out:
2457         if (ret == 0) {
2458                 *ret_orphan_dir = orphan_dir;
2459                 *ret_di_blkno = di_blkno;
2460                 *ret_inode_ac = inode_ac;
2461                 /*
2462                  * orphan_name and orphan_insert are already up to
2463                  * date via prepare_orphan_dir
2464                  */
2465         } else {
2466                 /* Unroll reserve_new_inode* */
2467                 if (inode_ac)
2468                         ocfs2_free_alloc_context(inode_ac);
2469 
2470                 /* Unroll orphan dir locking */
2471                 inode_unlock(orphan_dir);
2472                 ocfs2_inode_unlock(orphan_dir, 1);
2473                 iput(orphan_dir);
2474         }
2475 
2476         brelse(orphan_dir_bh);
2477 
2478         return ret;
2479 }
2480 
2481 int ocfs2_create_inode_in_orphan(struct inode *dir,
2482                                  int mode,
2483                                  struct inode **new_inode)
2484 {
2485         int status, did_quota_inode = 0;
2486         struct inode *inode = NULL;
2487         struct inode *orphan_dir = NULL;
2488         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2489         struct ocfs2_dinode *di = NULL;
2490         handle_t *handle = NULL;
2491         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2492         struct buffer_head *parent_di_bh = NULL;
2493         struct buffer_head *new_di_bh = NULL;
2494         struct ocfs2_alloc_context *inode_ac = NULL;
2495         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2496         u64 uninitialized_var(di_blkno), suballoc_loc;
2497         u16 suballoc_bit;
2498 
2499         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2500         if (status < 0) {
2501                 if (status != -ENOENT)
2502                         mlog_errno(status);
2503                 return status;
2504         }
2505 
2506         status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2507                                               orphan_name, &orphan_dir,
2508                                               &di_blkno, &orphan_insert, &inode_ac);
2509         if (status < 0) {
2510                 if (status != -ENOSPC)
2511                         mlog_errno(status);
2512                 goto leave;
2513         }
2514 
2515         inode = ocfs2_get_init_inode(dir, mode);
2516         if (IS_ERR(inode)) {
2517                 status = PTR_ERR(inode);
2518                 inode = NULL;
2519                 mlog_errno(status);
2520                 goto leave;
2521         }
2522 
2523         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2524         if (IS_ERR(handle)) {
2525                 status = PTR_ERR(handle);
2526                 handle = NULL;
2527                 mlog_errno(status);
2528                 goto leave;
2529         }
2530 
2531         status = dquot_alloc_inode(inode);
2532         if (status)
2533                 goto leave;
2534         did_quota_inode = 1;
2535 
2536         status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2537                                               &suballoc_loc,
2538                                               &suballoc_bit, di_blkno);
2539         if (status < 0) {
2540                 mlog_errno(status);
2541                 goto leave;
2542         }
2543 
2544         clear_nlink(inode);
2545         /* do the real work now. */
2546         status = __ocfs2_mknod_locked(dir, inode,
2547                                       0, &new_di_bh, parent_di_bh, handle,
2548                                       inode_ac, di_blkno, suballoc_loc,
2549                                       suballoc_bit);
2550         if (status < 0) {
2551                 mlog_errno(status);
2552                 goto leave;
2553         }
2554 
2555         di = (struct ocfs2_dinode *)new_di_bh->b_data;
2556         status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2557                                   &orphan_insert, orphan_dir, false);
2558         if (status < 0) {
2559                 mlog_errno(status);
2560                 goto leave;
2561         }
2562 
2563         /* get open lock so that only nodes can't remove it from orphan dir. */
2564         status = ocfs2_open_lock(inode);
2565         if (status < 0)
2566                 mlog_errno(status);
2567 
2568         insert_inode_hash(inode);
2569 leave:
2570         if (status < 0 && did_quota_inode)
2571                 dquot_free_inode(inode);
2572         if (handle)
2573                 ocfs2_commit_trans(osb, handle);
2574 
2575         if (orphan_dir) {
2576                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2577                 ocfs2_inode_unlock(orphan_dir, 1);
2578                 inode_unlock(orphan_dir);
2579                 iput(orphan_dir);
2580         }
2581 
2582         if ((status < 0) && inode) {
2583                 clear_nlink(inode);
2584                 iput(inode);
2585         }
2586 
2587         if (inode_ac)
2588                 ocfs2_free_alloc_context(inode_ac);
2589 
2590         brelse(new_di_bh);
2591 
2592         if (!status)
2593                 *new_inode = inode;
2594 
2595         ocfs2_free_dir_lookup_result(&orphan_insert);
2596 
2597         ocfs2_inode_unlock(dir, 1);
2598         brelse(parent_di_bh);
2599         return status;
2600 }
2601 
2602 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
2603         struct inode *inode)
2604 {
2605         char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2606         struct inode *orphan_dir_inode = NULL;
2607         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2608         struct buffer_head *di_bh = NULL;
2609         int status = 0;
2610         handle_t *handle = NULL;
2611         struct ocfs2_dinode *di = NULL;
2612 
2613         status = ocfs2_inode_lock(inode, &di_bh, 1);
2614         if (status < 0) {
2615                 mlog_errno(status);
2616                 goto bail;
2617         }
2618 
2619         di = (struct ocfs2_dinode *) di_bh->b_data;
2620         /*
2621          * Another append dio crashed?
2622          * If so, manually recover it first.
2623          */
2624         if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
2625                 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode));
2626                 if (status < 0) {
2627                         if (status != -ENOSPC)
2628                                 mlog_errno(status);
2629                         goto bail_unlock_inode;
2630                 }
2631 
2632                 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0);
2633                 if (status < 0) {
2634                         mlog_errno(status);
2635                         goto bail_unlock_inode;
2636                 }
2637         }
2638 
2639         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
2640                         OCFS2_I(inode)->ip_blkno,
2641                         orphan_name,
2642                         &orphan_insert,
2643                         true);
2644         if (status < 0) {
2645                 mlog_errno(status);
2646                 goto bail_unlock_inode;
2647         }
2648 
2649         handle = ocfs2_start_trans(osb,
2650                         OCFS2_INODE_ADD_TO_ORPHAN_CREDITS);
2651         if (IS_ERR(handle)) {
2652                 status = PTR_ERR(handle);
2653                 goto bail_unlock_orphan;
2654         }
2655 
2656         status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
2657                         &orphan_insert, orphan_dir_inode, true);
2658         if (status)
2659                 mlog_errno(status);
2660 
2661         ocfs2_commit_trans(osb, handle);
2662 
2663 bail_unlock_orphan:
2664         ocfs2_inode_unlock(orphan_dir_inode, 1);
2665         inode_unlock(orphan_dir_inode);
2666         iput(orphan_dir_inode);
2667 
2668         ocfs2_free_dir_lookup_result(&orphan_insert);
2669 
2670 bail_unlock_inode:
2671         ocfs2_inode_unlock(inode, 1);
2672         brelse(di_bh);
2673 
2674 bail:
2675         return status;
2676 }
2677 
2678 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
2679                 struct inode *inode, struct buffer_head *di_bh,
2680                 int update_isize, loff_t end)
2681 {
2682         struct inode *orphan_dir_inode = NULL;
2683         struct buffer_head *orphan_dir_bh = NULL;
2684         struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2685         handle_t *handle = NULL;
2686         int status = 0;
2687 
2688         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2689                         ORPHAN_DIR_SYSTEM_INODE,
2690                         le16_to_cpu(di->i_dio_orphaned_slot));
2691         if (!orphan_dir_inode) {
2692                 status = -ENOENT;
2693                 mlog_errno(status);
2694                 goto bail;
2695         }
2696 
2697         inode_lock(orphan_dir_inode);
2698         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2699         if (status < 0) {
2700                 inode_unlock(orphan_dir_inode);
2701                 iput(orphan_dir_inode);
2702                 mlog_errno(status);
2703                 goto bail;
2704         }
2705 
2706         handle = ocfs2_start_trans(osb,
2707                         OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS);
2708         if (IS_ERR(handle)) {
2709                 status = PTR_ERR(handle);
2710                 goto bail_unlock_orphan;
2711         }
2712 
2713         BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)));
2714 
2715         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
2716                                 inode, orphan_dir_bh, true);
2717         if (status < 0) {
2718                 mlog_errno(status);
2719                 goto bail_commit;
2720         }
2721 
2722         status = ocfs2_journal_access_di(handle,
2723                         INODE_CACHE(inode),
2724                         di_bh,
2725                         OCFS2_JOURNAL_ACCESS_WRITE);
2726         if (status < 0) {
2727                 mlog_errno(status);
2728                 goto bail_commit;
2729         }
2730 
2731         di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2732         di->i_dio_orphaned_slot = 0;
2733 
2734         if (update_isize) {
2735                 status = ocfs2_set_inode_size(handle, inode, di_bh, end);
2736                 if (status)
2737                         mlog_errno(status);
2738         } else
2739                 ocfs2_journal_dirty(handle, di_bh);
2740 
2741 bail_commit:
2742         ocfs2_commit_trans(osb, handle);
2743 
2744 bail_unlock_orphan:
2745         ocfs2_inode_unlock(orphan_dir_inode, 1);
2746         inode_unlock(orphan_dir_inode);
2747         brelse(orphan_dir_bh);
2748         iput(orphan_dir_inode);
2749 
2750 bail:
2751         return status;
2752 }
2753 
2754 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2755                                    struct inode *inode,
2756                                    struct dentry *dentry)
2757 {
2758         int status = 0;
2759         struct buffer_head *parent_di_bh = NULL;
2760         handle_t *handle = NULL;
2761         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2762         struct ocfs2_dinode *dir_di, *di;
2763         struct inode *orphan_dir_inode = NULL;
2764         struct buffer_head *orphan_dir_bh = NULL;
2765         struct buffer_head *di_bh = NULL;
2766         struct ocfs2_dir_lookup_result lookup = { NULL, };
2767 
2768         trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2769                                 dentry->d_name.len, dentry->d_name.name,
2770                                 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2771                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2772 
2773         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2774         if (status < 0) {
2775                 if (status != -ENOENT)
2776                         mlog_errno(status);
2777                 return status;
2778         }
2779 
2780         dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2781         if (!dir_di->i_links_count) {
2782                 /* can't make a file in a deleted directory. */
2783                 status = -ENOENT;
2784                 goto leave;
2785         }
2786 
2787         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2788                                            dentry->d_name.len);
2789         if (status)
2790                 goto leave;
2791 
2792         /* get a spot inside the dir. */
2793         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2794                                               dentry->d_name.name,
2795                                               dentry->d_name.len, &lookup);
2796         if (status < 0) {
2797                 mlog_errno(status);
2798                 goto leave;
2799         }
2800 
2801         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2802                                                        ORPHAN_DIR_SYSTEM_INODE,
2803                                                        osb->slot_num);
2804         if (!orphan_dir_inode) {
2805                 status = -ENOENT;
2806                 mlog_errno(status);
2807                 goto leave;
2808         }
2809 
2810         inode_lock(orphan_dir_inode);
2811 
2812         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2813         if (status < 0) {
2814                 mlog_errno(status);
2815                 inode_unlock(orphan_dir_inode);
2816                 iput(orphan_dir_inode);
2817                 goto leave;
2818         }
2819 
2820         status = ocfs2_read_inode_block(inode, &di_bh);
2821         if (status < 0) {
2822                 mlog_errno(status);
2823                 goto orphan_unlock;
2824         }
2825 
2826         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2827         if (IS_ERR(handle)) {
2828                 status = PTR_ERR(handle);
2829                 handle = NULL;
2830                 mlog_errno(status);
2831                 goto orphan_unlock;
2832         }
2833 
2834         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2835                                          di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2836         if (status < 0) {
2837                 mlog_errno(status);
2838                 goto out_commit;
2839         }
2840 
2841         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2842                                   orphan_dir_bh, false);
2843         if (status < 0) {
2844                 mlog_errno(status);
2845                 goto out_commit;
2846         }
2847 
2848         di = (struct ocfs2_dinode *)di_bh->b_data;
2849         di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2850         di->i_orphaned_slot = 0;
2851         set_nlink(inode, 1);
2852         ocfs2_set_links_count(di, inode->i_nlink);
2853         ocfs2_update_inode_fsync_trans(handle, inode, 1);
2854         ocfs2_journal_dirty(handle, di_bh);
2855 
2856         status = ocfs2_add_entry(handle, dentry, inode,
2857                                  OCFS2_I(inode)->ip_blkno, parent_di_bh,
2858                                  &lookup);
2859         if (status < 0) {
2860                 mlog_errno(status);
2861                 goto out_commit;
2862         }
2863 
2864         status = ocfs2_dentry_attach_lock(dentry, inode,
2865                                           OCFS2_I(dir)->ip_blkno);
2866         if (status) {
2867                 mlog_errno(status);
2868                 goto out_commit;
2869         }
2870 
2871         d_instantiate(dentry, inode);
2872         status = 0;
2873 out_commit:
2874         ocfs2_commit_trans(osb, handle);
2875 orphan_unlock:
2876         ocfs2_inode_unlock(orphan_dir_inode, 1);
2877         inode_unlock(orphan_dir_inode);
2878         iput(orphan_dir_inode);
2879 leave:
2880 
2881         ocfs2_inode_unlock(dir, 1);
2882 
2883         brelse(di_bh);
2884         brelse(parent_di_bh);
2885         brelse(orphan_dir_bh);
2886 
2887         ocfs2_free_dir_lookup_result(&lookup);
2888 
2889         if (status)
2890                 mlog_errno(status);
2891 
2892         return status;
2893 }
2894 
2895 const struct inode_operations ocfs2_dir_iops = {
2896         .create         = ocfs2_create,
2897         .lookup         = ocfs2_lookup,
2898         .link           = ocfs2_link,
2899         .unlink         = ocfs2_unlink,
2900         .rmdir          = ocfs2_unlink,
2901         .symlink        = ocfs2_symlink,
2902         .mkdir          = ocfs2_mkdir,
2903         .mknod          = ocfs2_mknod,
2904         .rename         = ocfs2_rename,
2905         .setattr        = ocfs2_setattr,
2906         .getattr        = ocfs2_getattr,
2907         .permission     = ocfs2_permission,
2908         .listxattr      = ocfs2_listxattr,
2909         .fiemap         = ocfs2_fiemap,
2910         .get_acl        = ocfs2_iop_get_acl,
2911         .set_acl        = ocfs2_iop_set_acl,
2912 };
2913 

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