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Linux/fs/ocfs2/namei.c

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  1 /* -*- mode: c; c-basic-offset: 8; -*-
  2  * vim: noexpandtab sw=8 ts=8 sts=0:
  3  *
  4  * namei.c
  5  *
  6  * Create and rename file, directory, symlinks
  7  *
  8  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
  9  *
 10  *  Portions of this code from linux/fs/ext3/dir.c
 11  *
 12  *  Copyright (C) 1992, 1993, 1994, 1995
 13  *  Remy Card (card@masi.ibp.fr)
 14  *  Laboratoire MASI - Institut Blaise pascal
 15  *  Universite Pierre et Marie Curie (Paris VI)
 16  *
 17  *   from
 18  *
 19  *   linux/fs/minix/dir.c
 20  *
 21  *   Copyright (C) 1991, 1992 Linux Torvalds
 22  *
 23  * This program is free software; you can redistribute it and/or
 24  * modify it under the terms of the GNU General Public
 25  * License as published by the Free Software Foundation; either
 26  * version 2 of the License, or (at your option) any later version.
 27  *
 28  * This program is distributed in the hope that it will be useful,
 29  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 30  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 31  * General Public License for more details.
 32  *
 33  * You should have received a copy of the GNU General Public
 34  * License along with this program; if not, write to the
 35  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 36  * Boston, MA 021110-1307, USA.
 37  */
 38 
 39 #include <linux/fs.h>
 40 #include <linux/types.h>
 41 #include <linux/slab.h>
 42 #include <linux/highmem.h>
 43 #include <linux/quotaops.h>
 44 
 45 #include <cluster/masklog.h>
 46 
 47 #include "ocfs2.h"
 48 
 49 #include "alloc.h"
 50 #include "dcache.h"
 51 #include "dir.h"
 52 #include "dlmglue.h"
 53 #include "extent_map.h"
 54 #include "file.h"
 55 #include "inode.h"
 56 #include "journal.h"
 57 #include "namei.h"
 58 #include "suballoc.h"
 59 #include "super.h"
 60 #include "symlink.h"
 61 #include "sysfile.h"
 62 #include "uptodate.h"
 63 #include "xattr.h"
 64 #include "acl.h"
 65 #include "ocfs2_trace.h"
 66 
 67 #include "buffer_head_io.h"
 68 
 69 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
 70                               struct inode *dir,
 71                               struct inode *inode,
 72                               dev_t dev,
 73                               struct buffer_head **new_fe_bh,
 74                               struct buffer_head *parent_fe_bh,
 75                               handle_t *handle,
 76                               struct ocfs2_alloc_context *inode_ac);
 77 
 78 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
 79                                     struct inode **ret_orphan_dir,
 80                                     u64 blkno,
 81                                     char *name,
 82                                     struct ocfs2_dir_lookup_result *lookup,
 83                                     bool dio);
 84 
 85 static int ocfs2_orphan_add(struct ocfs2_super *osb,
 86                             handle_t *handle,
 87                             struct inode *inode,
 88                             struct buffer_head *fe_bh,
 89                             char *name,
 90                             struct ocfs2_dir_lookup_result *lookup,
 91                             struct inode *orphan_dir_inode,
 92                             bool dio);
 93 
 94 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
 95                                      handle_t *handle,
 96                                      struct inode *inode,
 97                                      const char *symname);
 98 
 99 static int ocfs2_double_lock(struct ocfs2_super *osb,
100                              struct buffer_head **bh1,
101                              struct inode *inode1,
102                              struct buffer_head **bh2,
103                              struct inode *inode2,
104                              int rename);
105 
106 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2);
107 /* An orphan dir name is an 8 byte value, printed as a hex string */
108 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
109 
110 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
111                                    unsigned int flags)
112 {
113         int status;
114         u64 blkno;
115         struct inode *inode = NULL;
116         struct dentry *ret;
117         struct ocfs2_inode_info *oi;
118 
119         trace_ocfs2_lookup(dir, dentry, dentry->d_name.len,
120                            dentry->d_name.name,
121                            (unsigned long long)OCFS2_I(dir)->ip_blkno, 0);
122 
123         if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
124                 ret = ERR_PTR(-ENAMETOOLONG);
125                 goto bail;
126         }
127 
128         status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
129         if (status < 0) {
130                 if (status != -ENOENT)
131                         mlog_errno(status);
132                 ret = ERR_PTR(status);
133                 goto bail;
134         }
135 
136         status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
137                                             dentry->d_name.len, &blkno);
138         if (status < 0)
139                 goto bail_add;
140 
141         inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
142         if (IS_ERR(inode)) {
143                 ret = ERR_PTR(-EACCES);
144                 goto bail_unlock;
145         }
146 
147         oi = OCFS2_I(inode);
148         /* Clear any orphaned state... If we were able to look up the
149          * inode from a directory, it certainly can't be orphaned. We
150          * might have the bad state from a node which intended to
151          * orphan this inode but crashed before it could commit the
152          * unlink. */
153         spin_lock(&oi->ip_lock);
154         oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
155         spin_unlock(&oi->ip_lock);
156 
157 bail_add:
158         ret = d_splice_alias(inode, dentry);
159 
160         if (inode) {
161                 /*
162                  * If d_splice_alias() finds a DCACHE_DISCONNECTED
163                  * dentry, it will d_move() it on top of ourse. The
164                  * return value will indicate this however, so in
165                  * those cases, we switch them around for the locking
166                  * code.
167                  *
168                  * NOTE: This dentry already has ->d_op set from
169                  * ocfs2_get_parent() and ocfs2_get_dentry()
170                  */
171                 if (!IS_ERR_OR_NULL(ret))
172                         dentry = ret;
173 
174                 status = ocfs2_dentry_attach_lock(dentry, inode,
175                                                   OCFS2_I(dir)->ip_blkno);
176                 if (status) {
177                         mlog_errno(status);
178                         ret = ERR_PTR(status);
179                         goto bail_unlock;
180                 }
181         } else
182                 ocfs2_dentry_attach_gen(dentry);
183 
184 bail_unlock:
185         /* Don't drop the cluster lock until *after* the d_add --
186          * unlink on another node will message us to remove that
187          * dentry under this lock so otherwise we can race this with
188          * the downconvert thread and have a stale dentry. */
189         ocfs2_inode_unlock(dir, 0);
190 
191 bail:
192 
193         trace_ocfs2_lookup_ret(ret);
194 
195         return ret;
196 }
197 
198 static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode)
199 {
200         struct inode *inode;
201         int status;
202 
203         inode = new_inode(dir->i_sb);
204         if (!inode) {
205                 mlog(ML_ERROR, "new_inode failed!\n");
206                 return ERR_PTR(-ENOMEM);
207         }
208 
209         /* populate as many fields early on as possible - many of
210          * these are used by the support functions here and in
211          * callers. */
212         if (S_ISDIR(mode))
213                 set_nlink(inode, 2);
214         inode_init_owner(inode, dir, mode);
215         status = dquot_initialize(inode);
216         if (status)
217                 return ERR_PTR(status);
218 
219         return inode;
220 }
221 
222 static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb,
223                 struct dentry *dentry, struct inode *inode)
224 {
225         struct ocfs2_dentry_lock *dl = dentry->d_fsdata;
226 
227         ocfs2_simple_drop_lockres(osb, &dl->dl_lockres);
228         ocfs2_lock_res_free(&dl->dl_lockres);
229         BUG_ON(dl->dl_count != 1);
230         spin_lock(&dentry_attach_lock);
231         dentry->d_fsdata = NULL;
232         spin_unlock(&dentry_attach_lock);
233         kfree(dl);
234         iput(inode);
235 }
236 
237 static int ocfs2_mknod(struct inode *dir,
238                        struct dentry *dentry,
239                        umode_t mode,
240                        dev_t dev)
241 {
242         int status = 0;
243         struct buffer_head *parent_fe_bh = NULL;
244         handle_t *handle = NULL;
245         struct ocfs2_super *osb;
246         struct ocfs2_dinode *dirfe;
247         struct buffer_head *new_fe_bh = NULL;
248         struct inode *inode = NULL;
249         struct ocfs2_alloc_context *inode_ac = NULL;
250         struct ocfs2_alloc_context *data_ac = NULL;
251         struct ocfs2_alloc_context *meta_ac = NULL;
252         int want_clusters = 0;
253         int want_meta = 0;
254         int xattr_credits = 0;
255         struct ocfs2_security_xattr_info si = {
256                 .enable = 1,
257         };
258         int did_quota_inode = 0;
259         struct ocfs2_dir_lookup_result lookup = { NULL, };
260         sigset_t oldset;
261         int did_block_signals = 0;
262         struct ocfs2_dentry_lock *dl = NULL;
263 
264         trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
265                           (unsigned long long)OCFS2_I(dir)->ip_blkno,
266                           (unsigned long)dev, mode);
267 
268         status = dquot_initialize(dir);
269         if (status) {
270                 mlog_errno(status);
271                 return status;
272         }
273 
274         /* get our super block */
275         osb = OCFS2_SB(dir->i_sb);
276 
277         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
278         if (status < 0) {
279                 if (status != -ENOENT)
280                         mlog_errno(status);
281                 return status;
282         }
283 
284         if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
285                 status = -EMLINK;
286                 goto leave;
287         }
288 
289         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
290         if (!ocfs2_read_links_count(dirfe)) {
291                 /* can't make a file in a deleted directory. */
292                 status = -ENOENT;
293                 goto leave;
294         }
295 
296         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
297                                            dentry->d_name.len);
298         if (status)
299                 goto leave;
300 
301         /* get a spot inside the dir. */
302         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
303                                               dentry->d_name.name,
304                                               dentry->d_name.len, &lookup);
305         if (status < 0) {
306                 mlog_errno(status);
307                 goto leave;
308         }
309 
310         /* reserve an inode spot */
311         status = ocfs2_reserve_new_inode(osb, &inode_ac);
312         if (status < 0) {
313                 if (status != -ENOSPC)
314                         mlog_errno(status);
315                 goto leave;
316         }
317 
318         inode = ocfs2_get_init_inode(dir, mode);
319         if (IS_ERR(inode)) {
320                 status = PTR_ERR(inode);
321                 inode = NULL;
322                 mlog_errno(status);
323                 goto leave;
324         }
325 
326         /* get security xattr */
327         status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
328         if (status) {
329                 if (status == -EOPNOTSUPP)
330                         si.enable = 0;
331                 else {
332                         mlog_errno(status);
333                         goto leave;
334                 }
335         }
336 
337         /* calculate meta data/clusters for setting security and acl xattr */
338         status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
339                                        &si, &want_clusters,
340                                        &xattr_credits, &want_meta);
341         if (status < 0) {
342                 mlog_errno(status);
343                 goto leave;
344         }
345 
346         /* Reserve a cluster if creating an extent based directory. */
347         if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
348                 want_clusters += 1;
349 
350                 /* Dir indexing requires extra space as well */
351                 if (ocfs2_supports_indexed_dirs(osb))
352                         want_meta++;
353         }
354 
355         status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
356         if (status < 0) {
357                 if (status != -ENOSPC)
358                         mlog_errno(status);
359                 goto leave;
360         }
361 
362         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
363         if (status < 0) {
364                 if (status != -ENOSPC)
365                         mlog_errno(status);
366                 goto leave;
367         }
368 
369         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
370                                                             S_ISDIR(mode),
371                                                             xattr_credits));
372         if (IS_ERR(handle)) {
373                 status = PTR_ERR(handle);
374                 handle = NULL;
375                 mlog_errno(status);
376                 goto leave;
377         }
378 
379         /* Starting to change things, restart is no longer possible. */
380         ocfs2_block_signals(&oldset);
381         did_block_signals = 1;
382 
383         status = dquot_alloc_inode(inode);
384         if (status)
385                 goto leave;
386         did_quota_inode = 1;
387 
388         /* do the real work now. */
389         status = ocfs2_mknod_locked(osb, dir, inode, dev,
390                                     &new_fe_bh, parent_fe_bh, handle,
391                                     inode_ac);
392         if (status < 0) {
393                 mlog_errno(status);
394                 goto leave;
395         }
396 
397         if (S_ISDIR(mode)) {
398                 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
399                                             new_fe_bh, data_ac, meta_ac);
400                 if (status < 0) {
401                         mlog_errno(status);
402                         goto leave;
403                 }
404 
405                 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
406                                                  parent_fe_bh,
407                                                  OCFS2_JOURNAL_ACCESS_WRITE);
408                 if (status < 0) {
409                         mlog_errno(status);
410                         goto leave;
411                 }
412                 ocfs2_add_links_count(dirfe, 1);
413                 ocfs2_journal_dirty(handle, parent_fe_bh);
414                 inc_nlink(dir);
415         }
416 
417         status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
418                          meta_ac, data_ac);
419 
420         if (status < 0) {
421                 mlog_errno(status);
422                 goto leave;
423         }
424 
425         if (si.enable) {
426                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
427                                                  meta_ac, data_ac);
428                 if (status < 0) {
429                         mlog_errno(status);
430                         goto leave;
431                 }
432         }
433 
434         /*
435          * Do this before adding the entry to the directory. We add
436          * also set d_op after success so that ->d_iput() will cleanup
437          * the dentry lock even if ocfs2_add_entry() fails below.
438          */
439         status = ocfs2_dentry_attach_lock(dentry, inode,
440                                           OCFS2_I(dir)->ip_blkno);
441         if (status) {
442                 mlog_errno(status);
443                 goto leave;
444         }
445 
446         dl = dentry->d_fsdata;
447 
448         status = ocfs2_add_entry(handle, dentry, inode,
449                                  OCFS2_I(inode)->ip_blkno, parent_fe_bh,
450                                  &lookup);
451         if (status < 0) {
452                 mlog_errno(status);
453                 goto leave;
454         }
455 
456         insert_inode_hash(inode);
457         d_instantiate(dentry, inode);
458         status = 0;
459 leave:
460         if (status < 0 && did_quota_inode)
461                 dquot_free_inode(inode);
462         if (handle)
463                 ocfs2_commit_trans(osb, handle);
464 
465         ocfs2_inode_unlock(dir, 1);
466         if (did_block_signals)
467                 ocfs2_unblock_signals(&oldset);
468 
469         brelse(new_fe_bh);
470         brelse(parent_fe_bh);
471         kfree(si.value);
472 
473         ocfs2_free_dir_lookup_result(&lookup);
474 
475         if (inode_ac)
476                 ocfs2_free_alloc_context(inode_ac);
477 
478         if (data_ac)
479                 ocfs2_free_alloc_context(data_ac);
480 
481         if (meta_ac)
482                 ocfs2_free_alloc_context(meta_ac);
483 
484         /*
485          * We should call iput after the i_mutex of the bitmap been
486          * unlocked in ocfs2_free_alloc_context, or the
487          * ocfs2_delete_inode will mutex_lock again.
488          */
489         if ((status < 0) && inode) {
490                 if (dl)
491                         ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
492 
493                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
494                 clear_nlink(inode);
495                 iput(inode);
496         }
497 
498         if (status)
499                 mlog_errno(status);
500 
501         return status;
502 }
503 
504 static int __ocfs2_mknod_locked(struct inode *dir,
505                                 struct inode *inode,
506                                 dev_t dev,
507                                 struct buffer_head **new_fe_bh,
508                                 struct buffer_head *parent_fe_bh,
509                                 handle_t *handle,
510                                 struct ocfs2_alloc_context *inode_ac,
511                                 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
512 {
513         int status = 0;
514         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
515         struct ocfs2_dinode *fe = NULL;
516         struct ocfs2_extent_list *fel;
517         u16 feat;
518         struct ocfs2_inode_info *oi = OCFS2_I(inode);
519         struct timespec64 ts;
520 
521         *new_fe_bh = NULL;
522 
523         /* populate as many fields early on as possible - many of
524          * these are used by the support functions here and in
525          * callers. */
526         inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
527         OCFS2_I(inode)->ip_blkno = fe_blkno;
528         spin_lock(&osb->osb_lock);
529         inode->i_generation = osb->s_next_generation++;
530         spin_unlock(&osb->osb_lock);
531 
532         *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
533         if (!*new_fe_bh) {
534                 status = -ENOMEM;
535                 mlog_errno(status);
536                 goto leave;
537         }
538         ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
539 
540         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
541                                          *new_fe_bh,
542                                          OCFS2_JOURNAL_ACCESS_CREATE);
543         if (status < 0) {
544                 mlog_errno(status);
545                 goto leave;
546         }
547 
548         fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
549         memset(fe, 0, osb->sb->s_blocksize);
550 
551         fe->i_generation = cpu_to_le32(inode->i_generation);
552         fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
553         fe->i_blkno = cpu_to_le64(fe_blkno);
554         fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
555         fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
556         fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
557         fe->i_uid = cpu_to_le32(i_uid_read(inode));
558         fe->i_gid = cpu_to_le32(i_gid_read(inode));
559         fe->i_mode = cpu_to_le16(inode->i_mode);
560         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
561                 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
562 
563         ocfs2_set_links_count(fe, inode->i_nlink);
564 
565         fe->i_last_eb_blk = 0;
566         strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
567         fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
568         ktime_get_real_ts64(&ts);
569         fe->i_atime = fe->i_ctime = fe->i_mtime =
570                 cpu_to_le64(ts.tv_sec);
571         fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
572                 cpu_to_le32(ts.tv_nsec);
573         fe->i_dtime = 0;
574 
575         /*
576          * If supported, directories start with inline data. If inline
577          * isn't supported, but indexing is, we start them as indexed.
578          */
579         feat = le16_to_cpu(fe->i_dyn_features);
580         if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
581                 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
582 
583                 fe->id2.i_data.id_count = cpu_to_le16(
584                                 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
585         } else {
586                 fel = &fe->id2.i_list;
587                 fel->l_tree_depth = 0;
588                 fel->l_next_free_rec = 0;
589                 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
590         }
591 
592         ocfs2_journal_dirty(handle, *new_fe_bh);
593 
594         ocfs2_populate_inode(inode, fe, 1);
595         ocfs2_ci_set_new(osb, INODE_CACHE(inode));
596         if (!ocfs2_mount_local(osb)) {
597                 status = ocfs2_create_new_inode_locks(inode);
598                 if (status < 0)
599                         mlog_errno(status);
600         }
601 
602         oi->i_sync_tid = handle->h_transaction->t_tid;
603         oi->i_datasync_tid = handle->h_transaction->t_tid;
604 
605 leave:
606         if (status < 0) {
607                 if (*new_fe_bh) {
608                         brelse(*new_fe_bh);
609                         *new_fe_bh = NULL;
610                 }
611         }
612 
613         if (status)
614                 mlog_errno(status);
615         return status;
616 }
617 
618 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
619                               struct inode *dir,
620                               struct inode *inode,
621                               dev_t dev,
622                               struct buffer_head **new_fe_bh,
623                               struct buffer_head *parent_fe_bh,
624                               handle_t *handle,
625                               struct ocfs2_alloc_context *inode_ac)
626 {
627         int status = 0;
628         u64 suballoc_loc, fe_blkno = 0;
629         u16 suballoc_bit;
630 
631         *new_fe_bh = NULL;
632 
633         status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
634                                        inode_ac, &suballoc_loc,
635                                        &suballoc_bit, &fe_blkno);
636         if (status < 0) {
637                 mlog_errno(status);
638                 return status;
639         }
640 
641         status = __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
642                                     parent_fe_bh, handle, inode_ac,
643                                     fe_blkno, suballoc_loc, suballoc_bit);
644         if (status < 0) {
645                 u64 bg_blkno = ocfs2_which_suballoc_group(fe_blkno, suballoc_bit);
646                 int tmp = ocfs2_free_suballoc_bits(handle, inode_ac->ac_inode,
647                                 inode_ac->ac_bh, suballoc_bit, bg_blkno, 1);
648                 if (tmp)
649                         mlog_errno(tmp);
650         }
651 
652         return status;
653 }
654 
655 static int ocfs2_mkdir(struct inode *dir,
656                        struct dentry *dentry,
657                        umode_t mode)
658 {
659         int ret;
660 
661         trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
662                           OCFS2_I(dir)->ip_blkno, mode);
663         ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
664         if (ret)
665                 mlog_errno(ret);
666 
667         return ret;
668 }
669 
670 static int ocfs2_create(struct inode *dir,
671                         struct dentry *dentry,
672                         umode_t mode,
673                         bool excl)
674 {
675         int ret;
676 
677         trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
678                            (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
679         ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
680         if (ret)
681                 mlog_errno(ret);
682 
683         return ret;
684 }
685 
686 static int ocfs2_link(struct dentry *old_dentry,
687                       struct inode *dir,
688                       struct dentry *dentry)
689 {
690         handle_t *handle;
691         struct inode *inode = d_inode(old_dentry);
692         struct inode *old_dir = d_inode(old_dentry->d_parent);
693         int err;
694         struct buffer_head *fe_bh = NULL;
695         struct buffer_head *old_dir_bh = NULL;
696         struct buffer_head *parent_fe_bh = NULL;
697         struct ocfs2_dinode *fe = NULL;
698         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
699         struct ocfs2_dir_lookup_result lookup = { NULL, };
700         sigset_t oldset;
701         u64 old_de_ino;
702 
703         trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
704                          old_dentry->d_name.len, old_dentry->d_name.name,
705                          dentry->d_name.len, dentry->d_name.name);
706 
707         if (S_ISDIR(inode->i_mode))
708                 return -EPERM;
709 
710         err = dquot_initialize(dir);
711         if (err) {
712                 mlog_errno(err);
713                 return err;
714         }
715 
716         err = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
717                         &parent_fe_bh, dir, 0);
718         if (err < 0) {
719                 if (err != -ENOENT)
720                         mlog_errno(err);
721                 return err;
722         }
723 
724         /* make sure both dirs have bhs
725          * get an extra ref on old_dir_bh if old==new */
726         if (!parent_fe_bh) {
727                 if (old_dir_bh) {
728                         parent_fe_bh = old_dir_bh;
729                         get_bh(parent_fe_bh);
730                 } else {
731                         mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str);
732                         err = -EIO;
733                         goto out;
734                 }
735         }
736 
737         if (!dir->i_nlink) {
738                 err = -ENOENT;
739                 goto out;
740         }
741 
742         err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
743                         old_dentry->d_name.len, &old_de_ino);
744         if (err) {
745                 err = -ENOENT;
746                 goto out;
747         }
748 
749         /*
750          * Check whether another node removed the source inode while we
751          * were in the vfs.
752          */
753         if (old_de_ino != OCFS2_I(inode)->ip_blkno) {
754                 err = -ENOENT;
755                 goto out;
756         }
757 
758         err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
759                                         dentry->d_name.len);
760         if (err)
761                 goto out;
762 
763         err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
764                                            dentry->d_name.name,
765                                            dentry->d_name.len, &lookup);
766         if (err < 0) {
767                 mlog_errno(err);
768                 goto out;
769         }
770 
771         err = ocfs2_inode_lock(inode, &fe_bh, 1);
772         if (err < 0) {
773                 if (err != -ENOENT)
774                         mlog_errno(err);
775                 goto out;
776         }
777 
778         fe = (struct ocfs2_dinode *) fe_bh->b_data;
779         if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
780                 err = -EMLINK;
781                 goto out_unlock_inode;
782         }
783 
784         handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
785         if (IS_ERR(handle)) {
786                 err = PTR_ERR(handle);
787                 handle = NULL;
788                 mlog_errno(err);
789                 goto out_unlock_inode;
790         }
791 
792         /* Starting to change things, restart is no longer possible. */
793         ocfs2_block_signals(&oldset);
794 
795         err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
796                                       OCFS2_JOURNAL_ACCESS_WRITE);
797         if (err < 0) {
798                 mlog_errno(err);
799                 goto out_commit;
800         }
801 
802         inc_nlink(inode);
803         inode->i_ctime = current_time(inode);
804         ocfs2_set_links_count(fe, inode->i_nlink);
805         fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
806         fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
807         ocfs2_journal_dirty(handle, fe_bh);
808 
809         err = ocfs2_add_entry(handle, dentry, inode,
810                               OCFS2_I(inode)->ip_blkno,
811                               parent_fe_bh, &lookup);
812         if (err) {
813                 ocfs2_add_links_count(fe, -1);
814                 drop_nlink(inode);
815                 mlog_errno(err);
816                 goto out_commit;
817         }
818 
819         err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
820         if (err) {
821                 mlog_errno(err);
822                 goto out_commit;
823         }
824 
825         ihold(inode);
826         d_instantiate(dentry, inode);
827 
828 out_commit:
829         ocfs2_commit_trans(osb, handle);
830         ocfs2_unblock_signals(&oldset);
831 out_unlock_inode:
832         ocfs2_inode_unlock(inode, 1);
833 
834 out:
835         ocfs2_double_unlock(old_dir, dir);
836 
837         brelse(fe_bh);
838         brelse(parent_fe_bh);
839         brelse(old_dir_bh);
840 
841         ocfs2_free_dir_lookup_result(&lookup);
842 
843         if (err)
844                 mlog_errno(err);
845 
846         return err;
847 }
848 
849 /*
850  * Takes and drops an exclusive lock on the given dentry. This will
851  * force other nodes to drop it.
852  */
853 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
854 {
855         int ret;
856 
857         ret = ocfs2_dentry_lock(dentry, 1);
858         if (ret)
859                 mlog_errno(ret);
860         else
861                 ocfs2_dentry_unlock(dentry, 1);
862 
863         return ret;
864 }
865 
866 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
867 {
868         if (S_ISDIR(inode->i_mode)) {
869                 if (inode->i_nlink == 2)
870                         return 1;
871                 return 0;
872         }
873 
874         if (inode->i_nlink == 1)
875                 return 1;
876         return 0;
877 }
878 
879 static int ocfs2_unlink(struct inode *dir,
880                         struct dentry *dentry)
881 {
882         int status;
883         int child_locked = 0;
884         bool is_unlinkable = false;
885         struct inode *inode = d_inode(dentry);
886         struct inode *orphan_dir = NULL;
887         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
888         u64 blkno;
889         struct ocfs2_dinode *fe = NULL;
890         struct buffer_head *fe_bh = NULL;
891         struct buffer_head *parent_node_bh = NULL;
892         handle_t *handle = NULL;
893         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
894         struct ocfs2_dir_lookup_result lookup = { NULL, };
895         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
896 
897         trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
898                            dentry->d_name.name,
899                            (unsigned long long)OCFS2_I(dir)->ip_blkno,
900                            (unsigned long long)OCFS2_I(inode)->ip_blkno);
901 
902         status = dquot_initialize(dir);
903         if (status) {
904                 mlog_errno(status);
905                 return status;
906         }
907 
908         BUG_ON(d_inode(dentry->d_parent) != dir);
909 
910         if (inode == osb->root_inode)
911                 return -EPERM;
912 
913         status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
914                                          OI_LS_PARENT);
915         if (status < 0) {
916                 if (status != -ENOENT)
917                         mlog_errno(status);
918                 return status;
919         }
920 
921         status = ocfs2_find_files_on_disk(dentry->d_name.name,
922                                           dentry->d_name.len, &blkno, dir,
923                                           &lookup);
924         if (status < 0) {
925                 if (status != -ENOENT)
926                         mlog_errno(status);
927                 goto leave;
928         }
929 
930         if (OCFS2_I(inode)->ip_blkno != blkno) {
931                 status = -ENOENT;
932 
933                 trace_ocfs2_unlink_noent(
934                                 (unsigned long long)OCFS2_I(inode)->ip_blkno,
935                                 (unsigned long long)blkno,
936                                 OCFS2_I(inode)->ip_flags);
937                 goto leave;
938         }
939 
940         status = ocfs2_inode_lock(inode, &fe_bh, 1);
941         if (status < 0) {
942                 if (status != -ENOENT)
943                         mlog_errno(status);
944                 goto leave;
945         }
946         child_locked = 1;
947 
948         if (S_ISDIR(inode->i_mode)) {
949                 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
950                         status = -ENOTEMPTY;
951                         goto leave;
952                 }
953         }
954 
955         status = ocfs2_remote_dentry_delete(dentry);
956         if (status < 0) {
957                 /* This remote delete should succeed under all normal
958                  * circumstances. */
959                 mlog_errno(status);
960                 goto leave;
961         }
962 
963         if (ocfs2_inode_is_unlinkable(inode)) {
964                 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
965                                                   OCFS2_I(inode)->ip_blkno,
966                                                   orphan_name, &orphan_insert,
967                                                   false);
968                 if (status < 0) {
969                         mlog_errno(status);
970                         goto leave;
971                 }
972                 is_unlinkable = true;
973         }
974 
975         handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
976         if (IS_ERR(handle)) {
977                 status = PTR_ERR(handle);
978                 handle = NULL;
979                 mlog_errno(status);
980                 goto leave;
981         }
982 
983         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
984                                          OCFS2_JOURNAL_ACCESS_WRITE);
985         if (status < 0) {
986                 mlog_errno(status);
987                 goto leave;
988         }
989 
990         fe = (struct ocfs2_dinode *) fe_bh->b_data;
991 
992         /* delete the name from the parent dir */
993         status = ocfs2_delete_entry(handle, dir, &lookup);
994         if (status < 0) {
995                 mlog_errno(status);
996                 goto leave;
997         }
998 
999         if (S_ISDIR(inode->i_mode))
1000                 drop_nlink(inode);
1001         drop_nlink(inode);
1002         ocfs2_set_links_count(fe, inode->i_nlink);
1003         ocfs2_journal_dirty(handle, fe_bh);
1004 
1005         dir->i_ctime = dir->i_mtime = current_time(dir);
1006         if (S_ISDIR(inode->i_mode))
1007                 drop_nlink(dir);
1008 
1009         status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
1010         if (status < 0) {
1011                 mlog_errno(status);
1012                 if (S_ISDIR(inode->i_mode))
1013                         inc_nlink(dir);
1014                 goto leave;
1015         }
1016 
1017         if (is_unlinkable) {
1018                 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
1019                                 orphan_name, &orphan_insert, orphan_dir, false);
1020                 if (status < 0)
1021                         mlog_errno(status);
1022         }
1023 
1024 leave:
1025         if (handle)
1026                 ocfs2_commit_trans(osb, handle);
1027 
1028         if (orphan_dir) {
1029                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1030                 ocfs2_inode_unlock(orphan_dir, 1);
1031                 inode_unlock(orphan_dir);
1032                 iput(orphan_dir);
1033         }
1034 
1035         if (child_locked)
1036                 ocfs2_inode_unlock(inode, 1);
1037 
1038         ocfs2_inode_unlock(dir, 1);
1039 
1040         brelse(fe_bh);
1041         brelse(parent_node_bh);
1042 
1043         ocfs2_free_dir_lookup_result(&orphan_insert);
1044         ocfs2_free_dir_lookup_result(&lookup);
1045 
1046         if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
1047                 mlog_errno(status);
1048 
1049         return status;
1050 }
1051 
1052 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb,
1053                 u64 src_inode_no, u64 dest_inode_no)
1054 {
1055         int ret = 0, i = 0;
1056         u64 parent_inode_no = 0;
1057         u64 child_inode_no = src_inode_no;
1058         struct inode *child_inode;
1059 
1060 #define MAX_LOOKUP_TIMES 32
1061         while (1) {
1062                 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0);
1063                 if (IS_ERR(child_inode)) {
1064                         ret = PTR_ERR(child_inode);
1065                         break;
1066                 }
1067 
1068                 ret = ocfs2_inode_lock(child_inode, NULL, 0);
1069                 if (ret < 0) {
1070                         iput(child_inode);
1071                         if (ret != -ENOENT)
1072                                 mlog_errno(ret);
1073                         break;
1074                 }
1075 
1076                 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2,
1077                                 &parent_inode_no);
1078                 ocfs2_inode_unlock(child_inode, 0);
1079                 iput(child_inode);
1080                 if (ret < 0) {
1081                         ret = -ENOENT;
1082                         break;
1083                 }
1084 
1085                 if (parent_inode_no == dest_inode_no) {
1086                         ret = 1;
1087                         break;
1088                 }
1089 
1090                 if (parent_inode_no == osb->root_inode->i_ino) {
1091                         ret = 0;
1092                         break;
1093                 }
1094 
1095                 child_inode_no = parent_inode_no;
1096 
1097                 if (++i >= MAX_LOOKUP_TIMES) {
1098                         mlog(ML_NOTICE, "max lookup times reached, filesystem "
1099                                         "may have nested directories, "
1100                                         "src inode: %llu, dest inode: %llu.\n",
1101                                         (unsigned long long)src_inode_no,
1102                                         (unsigned long long)dest_inode_no);
1103                         ret = 0;
1104                         break;
1105                 }
1106         }
1107 
1108         return ret;
1109 }
1110 
1111 /*
1112  * The only place this should be used is rename and link!
1113  * if they have the same id, then the 1st one is the only one locked.
1114  */
1115 static int ocfs2_double_lock(struct ocfs2_super *osb,
1116                              struct buffer_head **bh1,
1117                              struct inode *inode1,
1118                              struct buffer_head **bh2,
1119                              struct inode *inode2,
1120                              int rename)
1121 {
1122         int status;
1123         int inode1_is_ancestor, inode2_is_ancestor;
1124         struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
1125         struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
1126 
1127         trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
1128                                 (unsigned long long)oi2->ip_blkno);
1129 
1130         if (*bh1)
1131                 *bh1 = NULL;
1132         if (*bh2)
1133                 *bh2 = NULL;
1134 
1135         /* we always want to lock the one with the lower lockid first.
1136          * and if they are nested, we lock ancestor first */
1137         if (oi1->ip_blkno != oi2->ip_blkno) {
1138                 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno,
1139                                 oi1->ip_blkno);
1140                 if (inode1_is_ancestor < 0) {
1141                         status = inode1_is_ancestor;
1142                         goto bail;
1143                 }
1144 
1145                 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno,
1146                                 oi2->ip_blkno);
1147                 if (inode2_is_ancestor < 0) {
1148                         status = inode2_is_ancestor;
1149                         goto bail;
1150                 }
1151 
1152                 if ((inode1_is_ancestor == 1) ||
1153                                 (oi1->ip_blkno < oi2->ip_blkno &&
1154                                 inode2_is_ancestor == 0)) {
1155                         /* switch id1 and id2 around */
1156                         swap(bh2, bh1);
1157                         swap(inode2, inode1);
1158                 }
1159                 /* lock id2 */
1160                 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1161                                 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT);
1162                 if (status < 0) {
1163                         if (status != -ENOENT)
1164                                 mlog_errno(status);
1165                         goto bail;
1166                 }
1167         }
1168 
1169         /* lock id1 */
1170         status = ocfs2_inode_lock_nested(inode1, bh1, 1,
1171                         rename == 1 ?  OI_LS_RENAME2 : OI_LS_PARENT);
1172         if (status < 0) {
1173                 /*
1174                  * An error return must mean that no cluster locks
1175                  * were held on function exit.
1176                  */
1177                 if (oi1->ip_blkno != oi2->ip_blkno) {
1178                         ocfs2_inode_unlock(inode2, 1);
1179                         brelse(*bh2);
1180                         *bh2 = NULL;
1181                 }
1182 
1183                 if (status != -ENOENT)
1184                         mlog_errno(status);
1185         }
1186 
1187         trace_ocfs2_double_lock_end(
1188                         (unsigned long long)OCFS2_I(inode1)->ip_blkno,
1189                         (unsigned long long)OCFS2_I(inode2)->ip_blkno);
1190 
1191 bail:
1192         if (status)
1193                 mlog_errno(status);
1194         return status;
1195 }
1196 
1197 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1198 {
1199         ocfs2_inode_unlock(inode1, 1);
1200 
1201         if (inode1 != inode2)
1202                 ocfs2_inode_unlock(inode2, 1);
1203 }
1204 
1205 static int ocfs2_rename(struct inode *old_dir,
1206                         struct dentry *old_dentry,
1207                         struct inode *new_dir,
1208                         struct dentry *new_dentry,
1209                         unsigned int flags)
1210 {
1211         int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1212         int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1213         struct inode *old_inode = d_inode(old_dentry);
1214         struct inode *new_inode = d_inode(new_dentry);
1215         struct inode *orphan_dir = NULL;
1216         struct ocfs2_dinode *newfe = NULL;
1217         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1218         struct buffer_head *newfe_bh = NULL;
1219         struct buffer_head *old_inode_bh = NULL;
1220         struct ocfs2_super *osb = NULL;
1221         u64 newfe_blkno, old_de_ino;
1222         handle_t *handle = NULL;
1223         struct buffer_head *old_dir_bh = NULL;
1224         struct buffer_head *new_dir_bh = NULL;
1225         u32 old_dir_nlink = old_dir->i_nlink;
1226         struct ocfs2_dinode *old_di;
1227         struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1228         struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1229         struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1230         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1231         struct ocfs2_dir_lookup_result target_insert = { NULL, };
1232         bool should_add_orphan = false;
1233 
1234         if (flags)
1235                 return -EINVAL;
1236 
1237         /* At some point it might be nice to break this function up a
1238          * bit. */
1239 
1240         trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1241                            old_dentry->d_name.len, old_dentry->d_name.name,
1242                            new_dentry->d_name.len, new_dentry->d_name.name);
1243 
1244         status = dquot_initialize(old_dir);
1245         if (status) {
1246                 mlog_errno(status);
1247                 goto bail;
1248         }
1249         status = dquot_initialize(new_dir);
1250         if (status) {
1251                 mlog_errno(status);
1252                 goto bail;
1253         }
1254 
1255         osb = OCFS2_SB(old_dir->i_sb);
1256 
1257         if (new_inode) {
1258                 if (!igrab(new_inode))
1259                         BUG();
1260         }
1261 
1262         /* Assume a directory hierarchy thusly:
1263          * a/b/c
1264          * a/d
1265          * a,b,c, and d are all directories.
1266          *
1267          * from cwd of 'a' on both nodes:
1268          * node1: mv b/c d
1269          * node2: mv d   b/c
1270          *
1271          * And that's why, just like the VFS, we need a file system
1272          * rename lock. */
1273         if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1274                 status = ocfs2_rename_lock(osb);
1275                 if (status < 0) {
1276                         mlog_errno(status);
1277                         goto bail;
1278                 }
1279                 rename_lock = 1;
1280 
1281                 /* here we cannot guarantee the inodes haven't just been
1282                  * changed, so check if they are nested again */
1283                 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino,
1284                                 old_inode->i_ino);
1285                 if (status < 0) {
1286                         mlog_errno(status);
1287                         goto bail;
1288                 } else if (status == 1) {
1289                         status = -EPERM;
1290                         trace_ocfs2_rename_not_permitted(
1291                                         (unsigned long long)old_inode->i_ino,
1292                                         (unsigned long long)new_dir->i_ino);
1293                         goto bail;
1294                 }
1295         }
1296 
1297         /* if old and new are the same, this'll just do one lock. */
1298         status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1299                                    &new_dir_bh, new_dir, 1);
1300         if (status < 0) {
1301                 mlog_errno(status);
1302                 goto bail;
1303         }
1304         parents_locked = 1;
1305 
1306         if (!new_dir->i_nlink) {
1307                 status = -EACCES;
1308                 goto bail;
1309         }
1310 
1311         /* make sure both dirs have bhs
1312          * get an extra ref on old_dir_bh if old==new */
1313         if (!new_dir_bh) {
1314                 if (old_dir_bh) {
1315                         new_dir_bh = old_dir_bh;
1316                         get_bh(new_dir_bh);
1317                 } else {
1318                         mlog(ML_ERROR, "no old_dir_bh!\n");
1319                         status = -EIO;
1320                         goto bail;
1321                 }
1322         }
1323 
1324         /*
1325          * Aside from allowing a meta data update, the locking here
1326          * also ensures that the downconvert thread on other nodes
1327          * won't have to concurrently downconvert the inode and the
1328          * dentry locks.
1329          */
1330         status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1331                                          OI_LS_PARENT);
1332         if (status < 0) {
1333                 if (status != -ENOENT)
1334                         mlog_errno(status);
1335                 goto bail;
1336         }
1337         old_child_locked = 1;
1338 
1339         status = ocfs2_remote_dentry_delete(old_dentry);
1340         if (status < 0) {
1341                 mlog_errno(status);
1342                 goto bail;
1343         }
1344 
1345         if (S_ISDIR(old_inode->i_mode)) {
1346                 u64 old_inode_parent;
1347 
1348                 update_dot_dot = 1;
1349                 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1350                                                   old_inode,
1351                                                   &old_inode_dot_dot_res);
1352                 if (status) {
1353                         status = -EIO;
1354                         goto bail;
1355                 }
1356 
1357                 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1358                         status = -EIO;
1359                         goto bail;
1360                 }
1361 
1362                 if (!new_inode && new_dir != old_dir &&
1363                     new_dir->i_nlink >= ocfs2_link_max(osb)) {
1364                         status = -EMLINK;
1365                         goto bail;
1366                 }
1367         }
1368 
1369         status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1370                                             old_dentry->d_name.len,
1371                                             &old_de_ino);
1372         if (status) {
1373                 status = -ENOENT;
1374                 goto bail;
1375         }
1376 
1377         /*
1378          *  Check for inode number is _not_ due to possible IO errors.
1379          *  We might rmdir the source, keep it as pwd of some process
1380          *  and merrily kill the link to whatever was created under the
1381          *  same name. Goodbye sticky bit ;-<
1382          */
1383         if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1384                 status = -ENOENT;
1385                 goto bail;
1386         }
1387 
1388         /* check if the target already exists (in which case we need
1389          * to delete it */
1390         status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1391                                           new_dentry->d_name.len,
1392                                           &newfe_blkno, new_dir,
1393                                           &target_lookup_res);
1394         /* The only error we allow here is -ENOENT because the new
1395          * file not existing is perfectly valid. */
1396         if ((status < 0) && (status != -ENOENT)) {
1397                 /* If we cannot find the file specified we should just */
1398                 /* return the error... */
1399                 mlog_errno(status);
1400                 goto bail;
1401         }
1402         if (status == 0)
1403                 target_exists = 1;
1404 
1405         if (!target_exists && new_inode) {
1406                 /*
1407                  * Target was unlinked by another node while we were
1408                  * waiting to get to ocfs2_rename(). There isn't
1409                  * anything we can do here to help the situation, so
1410                  * bubble up the appropriate error.
1411                  */
1412                 status = -ENOENT;
1413                 goto bail;
1414         }
1415 
1416         /* In case we need to overwrite an existing file, we blow it
1417          * away first */
1418         if (target_exists) {
1419                 /* VFS didn't think there existed an inode here, but
1420                  * someone else in the cluster must have raced our
1421                  * rename to create one. Today we error cleanly, in
1422                  * the future we should consider calling iget to build
1423                  * a new struct inode for this entry. */
1424                 if (!new_inode) {
1425                         status = -EACCES;
1426 
1427                         trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1428                                                 new_dentry->d_name.name);
1429                         goto bail;
1430                 }
1431 
1432                 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1433                         status = -EACCES;
1434 
1435                         trace_ocfs2_rename_disagree(
1436                              (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1437                              (unsigned long long)newfe_blkno,
1438                              OCFS2_I(new_inode)->ip_flags);
1439                         goto bail;
1440                 }
1441 
1442                 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1443                 if (status < 0) {
1444                         if (status != -ENOENT)
1445                                 mlog_errno(status);
1446                         goto bail;
1447                 }
1448                 new_child_locked = 1;
1449 
1450                 status = ocfs2_remote_dentry_delete(new_dentry);
1451                 if (status < 0) {
1452                         mlog_errno(status);
1453                         goto bail;
1454                 }
1455 
1456                 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1457 
1458                 trace_ocfs2_rename_over_existing(
1459                      (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1460                      (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1461 
1462                 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1463                         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1464                                                 OCFS2_I(new_inode)->ip_blkno,
1465                                                 orphan_name, &orphan_insert,
1466                                                 false);
1467                         if (status < 0) {
1468                                 mlog_errno(status);
1469                                 goto bail;
1470                         }
1471                         should_add_orphan = true;
1472                 }
1473         } else {
1474                 BUG_ON(d_inode(new_dentry->d_parent) != new_dir);
1475 
1476                 status = ocfs2_check_dir_for_entry(new_dir,
1477                                                    new_dentry->d_name.name,
1478                                                    new_dentry->d_name.len);
1479                 if (status)
1480                         goto bail;
1481 
1482                 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1483                                                       new_dentry->d_name.name,
1484                                                       new_dentry->d_name.len,
1485                                                       &target_insert);
1486                 if (status < 0) {
1487                         mlog_errno(status);
1488                         goto bail;
1489                 }
1490         }
1491 
1492         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1493         if (IS_ERR(handle)) {
1494                 status = PTR_ERR(handle);
1495                 handle = NULL;
1496                 mlog_errno(status);
1497                 goto bail;
1498         }
1499 
1500         if (target_exists) {
1501                 if (S_ISDIR(new_inode->i_mode)) {
1502                         if (new_inode->i_nlink != 2 ||
1503                             !ocfs2_empty_dir(new_inode)) {
1504                                 status = -ENOTEMPTY;
1505                                 goto bail;
1506                         }
1507                 }
1508                 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1509                                                  newfe_bh,
1510                                                  OCFS2_JOURNAL_ACCESS_WRITE);
1511                 if (status < 0) {
1512                         mlog_errno(status);
1513                         goto bail;
1514                 }
1515 
1516                 /* change the dirent to point to the correct inode */
1517                 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1518                                             old_inode);
1519                 if (status < 0) {
1520                         mlog_errno(status);
1521                         goto bail;
1522                 }
1523                 new_dir->i_version++;
1524 
1525                 if (S_ISDIR(new_inode->i_mode))
1526                         ocfs2_set_links_count(newfe, 0);
1527                 else
1528                         ocfs2_add_links_count(newfe, -1);
1529                 ocfs2_journal_dirty(handle, newfe_bh);
1530                 if (should_add_orphan) {
1531                         status = ocfs2_orphan_add(osb, handle, new_inode,
1532                                         newfe_bh, orphan_name,
1533                                         &orphan_insert, orphan_dir, false);
1534                         if (status < 0) {
1535                                 mlog_errno(status);
1536                                 goto bail;
1537                         }
1538                 }
1539         } else {
1540                 /* if the name was not found in new_dir, add it now */
1541                 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1542                                          OCFS2_I(old_inode)->ip_blkno,
1543                                          new_dir_bh, &target_insert);
1544         }
1545 
1546         old_inode->i_ctime = current_time(old_inode);
1547         mark_inode_dirty(old_inode);
1548 
1549         status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1550                                          old_inode_bh,
1551                                          OCFS2_JOURNAL_ACCESS_WRITE);
1552         if (status >= 0) {
1553                 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1554 
1555                 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1556                 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1557                 ocfs2_journal_dirty(handle, old_inode_bh);
1558         } else
1559                 mlog_errno(status);
1560 
1561         /*
1562          * Now that the name has been added to new_dir, remove the old name.
1563          *
1564          * We don't keep any directory entry context around until now
1565          * because the insert might have changed the type of directory
1566          * we're dealing with.
1567          */
1568         status = ocfs2_find_entry(old_dentry->d_name.name,
1569                                   old_dentry->d_name.len, old_dir,
1570                                   &old_entry_lookup);
1571         if (status) {
1572                 if (!is_journal_aborted(osb->journal->j_journal)) {
1573                         ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1574                                         "is not deleted.",
1575                                         new_dentry->d_name.len, new_dentry->d_name.name,
1576                                         old_dentry->d_name.len, old_dentry->d_name.name);
1577                 }
1578                 goto bail;
1579         }
1580 
1581         status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1582         if (status < 0) {
1583                 mlog_errno(status);
1584                 if (!is_journal_aborted(osb->journal->j_journal)) {
1585                         ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1586                                         "is not deleted.",
1587                                         new_dentry->d_name.len, new_dentry->d_name.name,
1588                                         old_dentry->d_name.len, old_dentry->d_name.name);
1589                 }
1590                 goto bail;
1591         }
1592 
1593         if (new_inode) {
1594                 drop_nlink(new_inode);
1595                 new_inode->i_ctime = current_time(new_inode);
1596         }
1597         old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir);
1598 
1599         if (update_dot_dot) {
1600                 status = ocfs2_update_entry(old_inode, handle,
1601                                             &old_inode_dot_dot_res, new_dir);
1602                 drop_nlink(old_dir);
1603                 if (new_inode) {
1604                         drop_nlink(new_inode);
1605                 } else {
1606                         inc_nlink(new_dir);
1607                         mark_inode_dirty(new_dir);
1608                 }
1609         }
1610         mark_inode_dirty(old_dir);
1611         ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1612         if (new_inode) {
1613                 mark_inode_dirty(new_inode);
1614                 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1615         }
1616 
1617         if (old_dir != new_dir) {
1618                 /* Keep the same times on both directories.*/
1619                 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1620 
1621                 /*
1622                  * This will also pick up the i_nlink change from the
1623                  * block above.
1624                  */
1625                 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1626         }
1627 
1628         if (old_dir_nlink != old_dir->i_nlink) {
1629                 if (!old_dir_bh) {
1630                         mlog(ML_ERROR, "need to change nlink for old dir "
1631                              "%llu from %d to %d but bh is NULL!\n",
1632                              (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1633                              (int)old_dir_nlink, old_dir->i_nlink);
1634                 } else {
1635                         struct ocfs2_dinode *fe;
1636                         status = ocfs2_journal_access_di(handle,
1637                                                          INODE_CACHE(old_dir),
1638                                                          old_dir_bh,
1639                                                          OCFS2_JOURNAL_ACCESS_WRITE);
1640                         fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1641                         ocfs2_set_links_count(fe, old_dir->i_nlink);
1642                         ocfs2_journal_dirty(handle, old_dir_bh);
1643                 }
1644         }
1645         ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1646         status = 0;
1647 bail:
1648         if (handle)
1649                 ocfs2_commit_trans(osb, handle);
1650 
1651         if (orphan_dir) {
1652                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1653                 ocfs2_inode_unlock(orphan_dir, 1);
1654                 inode_unlock(orphan_dir);
1655                 iput(orphan_dir);
1656         }
1657 
1658         if (new_child_locked)
1659                 ocfs2_inode_unlock(new_inode, 1);
1660 
1661         if (old_child_locked)
1662                 ocfs2_inode_unlock(old_inode, 1);
1663 
1664         if (parents_locked)
1665                 ocfs2_double_unlock(old_dir, new_dir);
1666 
1667         if (rename_lock)
1668                 ocfs2_rename_unlock(osb);
1669 
1670         if (new_inode)
1671                 sync_mapping_buffers(old_inode->i_mapping);
1672 
1673         iput(new_inode);
1674 
1675         ocfs2_free_dir_lookup_result(&target_lookup_res);
1676         ocfs2_free_dir_lookup_result(&old_entry_lookup);
1677         ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1678         ocfs2_free_dir_lookup_result(&orphan_insert);
1679         ocfs2_free_dir_lookup_result(&target_insert);
1680 
1681         brelse(newfe_bh);
1682         brelse(old_inode_bh);
1683         brelse(old_dir_bh);
1684         brelse(new_dir_bh);
1685 
1686         if (status)
1687                 mlog_errno(status);
1688 
1689         return status;
1690 }
1691 
1692 /*
1693  * we expect i_size = strlen(symname). Copy symname into the file
1694  * data, including the null terminator.
1695  */
1696 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1697                                      handle_t *handle,
1698                                      struct inode *inode,
1699                                      const char *symname)
1700 {
1701         struct buffer_head **bhs = NULL;
1702         const char *c;
1703         struct super_block *sb = osb->sb;
1704         u64 p_blkno, p_blocks;
1705         int virtual, blocks, status, i, bytes_left;
1706 
1707         bytes_left = i_size_read(inode) + 1;
1708         /* we can't trust i_blocks because we're actually going to
1709          * write i_size + 1 bytes. */
1710         blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1711 
1712         trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1713                                         i_size_read(inode), blocks);
1714 
1715         /* Sanity check -- make sure we're going to fit. */
1716         if (bytes_left >
1717             ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1718                 status = -EIO;
1719                 mlog_errno(status);
1720                 goto bail;
1721         }
1722 
1723         bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1724         if (!bhs) {
1725                 status = -ENOMEM;
1726                 mlog_errno(status);
1727                 goto bail;
1728         }
1729 
1730         status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1731                                              NULL);
1732         if (status < 0) {
1733                 mlog_errno(status);
1734                 goto bail;
1735         }
1736 
1737         /* links can never be larger than one cluster so we know this
1738          * is all going to be contiguous, but do a sanity check
1739          * anyway. */
1740         if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1741                 status = -EIO;
1742                 mlog_errno(status);
1743                 goto bail;
1744         }
1745 
1746         virtual = 0;
1747         while(bytes_left > 0) {
1748                 c = &symname[virtual * sb->s_blocksize];
1749 
1750                 bhs[virtual] = sb_getblk(sb, p_blkno);
1751                 if (!bhs[virtual]) {
1752                         status = -ENOMEM;
1753                         mlog_errno(status);
1754                         goto bail;
1755                 }
1756                 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1757                                               bhs[virtual]);
1758 
1759                 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1760                                               bhs[virtual],
1761                                               OCFS2_JOURNAL_ACCESS_CREATE);
1762                 if (status < 0) {
1763                         mlog_errno(status);
1764                         goto bail;
1765                 }
1766 
1767                 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1768 
1769                 memcpy(bhs[virtual]->b_data, c,
1770                        (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1771                        bytes_left);
1772 
1773                 ocfs2_journal_dirty(handle, bhs[virtual]);
1774 
1775                 virtual++;
1776                 p_blkno++;
1777                 bytes_left -= sb->s_blocksize;
1778         }
1779 
1780         status = 0;
1781 bail:
1782 
1783         if (bhs) {
1784                 for(i = 0; i < blocks; i++)
1785                         brelse(bhs[i]);
1786                 kfree(bhs);
1787         }
1788 
1789         if (status)
1790                 mlog_errno(status);
1791         return status;
1792 }
1793 
1794 static int ocfs2_symlink(struct inode *dir,
1795                          struct dentry *dentry,
1796                          const char *symname)
1797 {
1798         int status, l, credits;
1799         u64 newsize;
1800         struct ocfs2_super *osb = NULL;
1801         struct inode *inode = NULL;
1802         struct super_block *sb;
1803         struct buffer_head *new_fe_bh = NULL;
1804         struct buffer_head *parent_fe_bh = NULL;
1805         struct ocfs2_dinode *fe = NULL;
1806         struct ocfs2_dinode *dirfe;
1807         handle_t *handle = NULL;
1808         struct ocfs2_alloc_context *inode_ac = NULL;
1809         struct ocfs2_alloc_context *data_ac = NULL;
1810         struct ocfs2_alloc_context *xattr_ac = NULL;
1811         int want_clusters = 0;
1812         int xattr_credits = 0;
1813         struct ocfs2_security_xattr_info si = {
1814                 .enable = 1,
1815         };
1816         int did_quota = 0, did_quota_inode = 0;
1817         struct ocfs2_dir_lookup_result lookup = { NULL, };
1818         sigset_t oldset;
1819         int did_block_signals = 0;
1820         struct ocfs2_dentry_lock *dl = NULL;
1821 
1822         trace_ocfs2_symlink_begin(dir, dentry, symname,
1823                                   dentry->d_name.len, dentry->d_name.name);
1824 
1825         status = dquot_initialize(dir);
1826         if (status) {
1827                 mlog_errno(status);
1828                 goto bail;
1829         }
1830 
1831         sb = dir->i_sb;
1832         osb = OCFS2_SB(sb);
1833 
1834         l = strlen(symname) + 1;
1835 
1836         credits = ocfs2_calc_symlink_credits(sb);
1837 
1838         /* lock the parent directory */
1839         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1840         if (status < 0) {
1841                 if (status != -ENOENT)
1842                         mlog_errno(status);
1843                 return status;
1844         }
1845 
1846         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1847         if (!ocfs2_read_links_count(dirfe)) {
1848                 /* can't make a file in a deleted directory. */
1849                 status = -ENOENT;
1850                 goto bail;
1851         }
1852 
1853         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1854                                            dentry->d_name.len);
1855         if (status)
1856                 goto bail;
1857 
1858         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1859                                               dentry->d_name.name,
1860                                               dentry->d_name.len, &lookup);
1861         if (status < 0) {
1862                 mlog_errno(status);
1863                 goto bail;
1864         }
1865 
1866         status = ocfs2_reserve_new_inode(osb, &inode_ac);
1867         if (status < 0) {
1868                 if (status != -ENOSPC)
1869                         mlog_errno(status);
1870                 goto bail;
1871         }
1872 
1873         inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1874         if (IS_ERR(inode)) {
1875                 status = PTR_ERR(inode);
1876                 inode = NULL;
1877                 mlog_errno(status);
1878                 goto bail;
1879         }
1880 
1881         /* get security xattr */
1882         status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1883         if (status) {
1884                 if (status == -EOPNOTSUPP)
1885                         si.enable = 0;
1886                 else {
1887                         mlog_errno(status);
1888                         goto bail;
1889                 }
1890         }
1891 
1892         /* calculate meta data/clusters for setting security xattr */
1893         if (si.enable) {
1894                 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1895                                                   &xattr_credits, &xattr_ac);
1896                 if (status < 0) {
1897                         mlog_errno(status);
1898                         goto bail;
1899                 }
1900         }
1901 
1902         /* don't reserve bitmap space for fast symlinks. */
1903         if (l > ocfs2_fast_symlink_chars(sb))
1904                 want_clusters += 1;
1905 
1906         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1907         if (status < 0) {
1908                 if (status != -ENOSPC)
1909                         mlog_errno(status);
1910                 goto bail;
1911         }
1912 
1913         handle = ocfs2_start_trans(osb, credits + xattr_credits);
1914         if (IS_ERR(handle)) {
1915                 status = PTR_ERR(handle);
1916                 handle = NULL;
1917                 mlog_errno(status);
1918                 goto bail;
1919         }
1920 
1921         /* Starting to change things, restart is no longer possible. */
1922         ocfs2_block_signals(&oldset);
1923         did_block_signals = 1;
1924 
1925         status = dquot_alloc_inode(inode);
1926         if (status)
1927                 goto bail;
1928         did_quota_inode = 1;
1929 
1930         trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1931                                    dentry->d_name.name,
1932                                    (unsigned long long)OCFS2_I(dir)->ip_blkno,
1933                                    inode->i_mode);
1934 
1935         status = ocfs2_mknod_locked(osb, dir, inode,
1936                                     0, &new_fe_bh, parent_fe_bh, handle,
1937                                     inode_ac);
1938         if (status < 0) {
1939                 mlog_errno(status);
1940                 goto bail;
1941         }
1942 
1943         fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1944         inode->i_rdev = 0;
1945         newsize = l - 1;
1946         inode->i_op = &ocfs2_symlink_inode_operations;
1947         inode_nohighmem(inode);
1948         if (l > ocfs2_fast_symlink_chars(sb)) {
1949                 u32 offset = 0;
1950 
1951                 status = dquot_alloc_space_nodirty(inode,
1952                     ocfs2_clusters_to_bytes(osb->sb, 1));
1953                 if (status)
1954                         goto bail;
1955                 did_quota = 1;
1956                 inode->i_mapping->a_ops = &ocfs2_aops;
1957                 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1958                                               new_fe_bh,
1959                                               handle, data_ac, NULL,
1960                                               NULL);
1961                 if (status < 0) {
1962                         if (status != -ENOSPC && status != -EINTR) {
1963                                 mlog(ML_ERROR,
1964                                      "Failed to extend file to %llu\n",
1965                                      (unsigned long long)newsize);
1966                                 mlog_errno(status);
1967                                 status = -ENOSPC;
1968                         }
1969                         goto bail;
1970                 }
1971                 i_size_write(inode, newsize);
1972                 inode->i_blocks = ocfs2_inode_sector_count(inode);
1973         } else {
1974                 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1975                 memcpy((char *) fe->id2.i_symlink, symname, l);
1976                 i_size_write(inode, newsize);
1977                 inode->i_blocks = 0;
1978         }
1979 
1980         status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1981         if (status < 0) {
1982                 mlog_errno(status);
1983                 goto bail;
1984         }
1985 
1986         if (!ocfs2_inode_is_fast_symlink(inode)) {
1987                 status = ocfs2_create_symlink_data(osb, handle, inode,
1988                                                    symname);
1989                 if (status < 0) {
1990                         mlog_errno(status);
1991                         goto bail;
1992                 }
1993         }
1994 
1995         if (si.enable) {
1996                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1997                                                  xattr_ac, data_ac);
1998                 if (status < 0) {
1999                         mlog_errno(status);
2000                         goto bail;
2001                 }
2002         }
2003 
2004         /*
2005          * Do this before adding the entry to the directory. We add
2006          * also set d_op after success so that ->d_iput() will cleanup
2007          * the dentry lock even if ocfs2_add_entry() fails below.
2008          */
2009         status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
2010         if (status) {
2011                 mlog_errno(status);
2012                 goto bail;
2013         }
2014 
2015         dl = dentry->d_fsdata;
2016 
2017         status = ocfs2_add_entry(handle, dentry, inode,
2018                                  le64_to_cpu(fe->i_blkno), parent_fe_bh,
2019                                  &lookup);
2020         if (status < 0) {
2021                 mlog_errno(status);
2022                 goto bail;
2023         }
2024 
2025         insert_inode_hash(inode);
2026         d_instantiate(dentry, inode);
2027 bail:
2028         if (status < 0 && did_quota)
2029                 dquot_free_space_nodirty(inode,
2030                                         ocfs2_clusters_to_bytes(osb->sb, 1));
2031         if (status < 0 && did_quota_inode)
2032                 dquot_free_inode(inode);
2033         if (handle)
2034                 ocfs2_commit_trans(osb, handle);
2035 
2036         ocfs2_inode_unlock(dir, 1);
2037         if (did_block_signals)
2038                 ocfs2_unblock_signals(&oldset);
2039 
2040         brelse(new_fe_bh);
2041         brelse(parent_fe_bh);
2042         kfree(si.value);
2043         ocfs2_free_dir_lookup_result(&lookup);
2044         if (inode_ac)
2045                 ocfs2_free_alloc_context(inode_ac);
2046         if (data_ac)
2047                 ocfs2_free_alloc_context(data_ac);
2048         if (xattr_ac)
2049                 ocfs2_free_alloc_context(xattr_ac);
2050         if ((status < 0) && inode) {
2051                 if (dl)
2052                         ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2053 
2054                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
2055                 clear_nlink(inode);
2056                 iput(inode);
2057         }
2058 
2059         if (status)
2060                 mlog_errno(status);
2061 
2062         return status;
2063 }
2064 
2065 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2066 {
2067         int status, namelen;
2068 
2069         namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2070                            (long long)blkno);
2071         if (namelen <= 0) {
2072                 if (namelen)
2073                         status = namelen;
2074                 else
2075                         status = -EINVAL;
2076                 mlog_errno(status);
2077                 goto bail;
2078         }
2079         if (namelen != OCFS2_ORPHAN_NAMELEN) {
2080                 status = -EINVAL;
2081                 mlog_errno(status);
2082                 goto bail;
2083         }
2084 
2085         trace_ocfs2_blkno_stringify(blkno, name, namelen);
2086 
2087         status = 0;
2088 bail:
2089         if (status < 0)
2090                 mlog_errno(status);
2091         return status;
2092 }
2093 
2094 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2095                                         struct inode **ret_orphan_dir,
2096                                         struct buffer_head **ret_orphan_dir_bh)
2097 {
2098         struct inode *orphan_dir_inode;
2099         struct buffer_head *orphan_dir_bh = NULL;
2100         int ret = 0;
2101 
2102         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2103                                                        ORPHAN_DIR_SYSTEM_INODE,
2104                                                        osb->slot_num);
2105         if (!orphan_dir_inode) {
2106                 ret = -ENOENT;
2107                 mlog_errno(ret);
2108                 return ret;
2109         }
2110 
2111         inode_lock(orphan_dir_inode);
2112 
2113         ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2114         if (ret < 0) {
2115                 inode_unlock(orphan_dir_inode);
2116                 iput(orphan_dir_inode);
2117 
2118                 mlog_errno(ret);
2119                 return ret;
2120         }
2121 
2122         *ret_orphan_dir = orphan_dir_inode;
2123         *ret_orphan_dir_bh = orphan_dir_bh;
2124 
2125         return 0;
2126 }
2127 
2128 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2129                                       struct buffer_head *orphan_dir_bh,
2130                                       u64 blkno,
2131                                       char *name,
2132                                       struct ocfs2_dir_lookup_result *lookup,
2133                                       bool dio)
2134 {
2135         int ret;
2136         struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2137         int namelen = dio ?
2138                         (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2139                         OCFS2_ORPHAN_NAMELEN;
2140 
2141         if (dio) {
2142                 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2143                                 OCFS2_DIO_ORPHAN_PREFIX);
2144                 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2145                         ret = -EINVAL;
2146                         mlog_errno(ret);
2147                         return ret;
2148                 }
2149 
2150                 ret = ocfs2_blkno_stringify(blkno,
2151                                 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2152         } else
2153                 ret = ocfs2_blkno_stringify(blkno, name);
2154         if (ret < 0) {
2155                 mlog_errno(ret);
2156                 return ret;
2157         }
2158 
2159         ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2160                                            orphan_dir_bh, name,
2161                                            namelen, lookup);
2162         if (ret < 0) {
2163                 mlog_errno(ret);
2164                 return ret;
2165         }
2166 
2167         return 0;
2168 }
2169 
2170 /**
2171  * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2172  * insertion of an orphan.
2173  * @osb: ocfs2 file system
2174  * @ret_orphan_dir: Orphan dir inode - returned locked!
2175  * @blkno: Actual block number of the inode to be inserted into orphan dir.
2176  * @lookup: dir lookup result, to be passed back into functions like
2177  *          ocfs2_orphan_add
2178  *
2179  * Returns zero on success and the ret_orphan_dir, name and lookup
2180  * fields will be populated.
2181  *
2182  * Returns non-zero on failure. 
2183  */
2184 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2185                                     struct inode **ret_orphan_dir,
2186                                     u64 blkno,
2187                                     char *name,
2188                                     struct ocfs2_dir_lookup_result *lookup,
2189                                     bool dio)
2190 {
2191         struct inode *orphan_dir_inode = NULL;
2192         struct buffer_head *orphan_dir_bh = NULL;
2193         int ret = 0;
2194 
2195         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2196                                            &orphan_dir_bh);
2197         if (ret < 0) {
2198                 mlog_errno(ret);
2199                 return ret;
2200         }
2201 
2202         ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2203                                          blkno, name, lookup, dio);
2204         if (ret < 0) {
2205                 mlog_errno(ret);
2206                 goto out;
2207         }
2208 
2209         *ret_orphan_dir = orphan_dir_inode;
2210 
2211 out:
2212         brelse(orphan_dir_bh);
2213 
2214         if (ret) {
2215                 ocfs2_inode_unlock(orphan_dir_inode, 1);
2216                 inode_unlock(orphan_dir_inode);
2217                 iput(orphan_dir_inode);
2218         }
2219 
2220         if (ret)
2221                 mlog_errno(ret);
2222         return ret;
2223 }
2224 
2225 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2226                             handle_t *handle,
2227                             struct inode *inode,
2228                             struct buffer_head *fe_bh,
2229                             char *name,
2230                             struct ocfs2_dir_lookup_result *lookup,
2231                             struct inode *orphan_dir_inode,
2232                             bool dio)
2233 {
2234         struct buffer_head *orphan_dir_bh = NULL;
2235         int status = 0;
2236         struct ocfs2_dinode *orphan_fe;
2237         struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2238         int namelen = dio ?
2239                         (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2240                         OCFS2_ORPHAN_NAMELEN;
2241 
2242         trace_ocfs2_orphan_add_begin(
2243                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2244 
2245         status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2246         if (status < 0) {
2247                 mlog_errno(status);
2248                 goto leave;
2249         }
2250 
2251         status = ocfs2_journal_access_di(handle,
2252                                          INODE_CACHE(orphan_dir_inode),
2253                                          orphan_dir_bh,
2254                                          OCFS2_JOURNAL_ACCESS_WRITE);
2255         if (status < 0) {
2256                 mlog_errno(status);
2257                 goto leave;
2258         }
2259 
2260         /*
2261          * We're going to journal the change of i_flags and i_orphaned_slot.
2262          * It's safe anyway, though some callers may duplicate the journaling.
2263          * Journaling within the func just make the logic look more
2264          * straightforward.
2265          */
2266         status = ocfs2_journal_access_di(handle,
2267                                          INODE_CACHE(inode),
2268                                          fe_bh,
2269                                          OCFS2_JOURNAL_ACCESS_WRITE);
2270         if (status < 0) {
2271                 mlog_errno(status);
2272                 goto leave;
2273         }
2274 
2275         /* we're a cluster, and nlink can change on disk from
2276          * underneath us... */
2277         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2278         if (S_ISDIR(inode->i_mode))
2279                 ocfs2_add_links_count(orphan_fe, 1);
2280         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2281         ocfs2_journal_dirty(handle, orphan_dir_bh);
2282 
2283         status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2284                                    namelen, inode,
2285                                    OCFS2_I(inode)->ip_blkno,
2286                                    orphan_dir_bh, lookup);
2287         if (status < 0) {
2288                 mlog_errno(status);
2289                 goto rollback;
2290         }
2291 
2292         if (dio) {
2293                 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan
2294                  * slot.
2295                  */
2296                 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2297                 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num);
2298         } else {
2299                 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2300                 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2301 
2302                 /* Record which orphan dir our inode now resides
2303                  * in. delete_inode will use this to determine which orphan
2304                  * dir to lock. */
2305                 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2306         }
2307 
2308         ocfs2_journal_dirty(handle, fe_bh);
2309 
2310         trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2311                                    osb->slot_num);
2312 
2313 rollback:
2314         if (status < 0) {
2315                 if (S_ISDIR(inode->i_mode))
2316                         ocfs2_add_links_count(orphan_fe, -1);
2317                 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2318         }
2319 
2320 leave:
2321         brelse(orphan_dir_bh);
2322 
2323         return status;
2324 }
2325 
2326 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2327 int ocfs2_orphan_del(struct ocfs2_super *osb,
2328                      handle_t *handle,
2329                      struct inode *orphan_dir_inode,
2330                      struct inode *inode,
2331                      struct buffer_head *orphan_dir_bh,
2332                      bool dio)
2333 {
2334         const int namelen = OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN;
2335         char name[namelen + 1];
2336         struct ocfs2_dinode *orphan_fe;
2337         int status = 0;
2338         struct ocfs2_dir_lookup_result lookup = { NULL, };
2339 
2340         if (dio) {
2341                 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2342                                 OCFS2_DIO_ORPHAN_PREFIX);
2343                 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2344                         status = -EINVAL;
2345                         mlog_errno(status);
2346                         return status;
2347                 }
2348 
2349                 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno,
2350                                 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2351         } else
2352                 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2353         if (status < 0) {
2354                 mlog_errno(status);
2355                 goto leave;
2356         }
2357 
2358         trace_ocfs2_orphan_del(
2359              (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2360              name, strlen(name));
2361 
2362         status = ocfs2_journal_access_di(handle,
2363                                          INODE_CACHE(orphan_dir_inode),
2364                                          orphan_dir_bh,
2365                                          OCFS2_JOURNAL_ACCESS_WRITE);
2366         if (status < 0) {
2367                 mlog_errno(status);
2368                 goto leave;
2369         }
2370 
2371         /* find it's spot in the orphan directory */
2372         status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode,
2373                                   &lookup);
2374         if (status) {
2375                 mlog_errno(status);
2376                 goto leave;
2377         }
2378 
2379         /* remove it from the orphan directory */
2380         status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2381         if (status < 0) {
2382                 mlog_errno(status);
2383                 goto leave;
2384         }
2385 
2386         /* do the i_nlink dance! :) */
2387         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2388         if (S_ISDIR(inode->i_mode))
2389                 ocfs2_add_links_count(orphan_fe, -1);
2390         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2391         ocfs2_journal_dirty(handle, orphan_dir_bh);
2392 
2393 leave:
2394         ocfs2_free_dir_lookup_result(&lookup);
2395 
2396         if (status)
2397                 mlog_errno(status);
2398         return status;
2399 }
2400 
2401 /**
2402  * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2403  * allocated file. This is different from the typical 'add to orphan dir'
2404  * operation in that the inode does not yet exist. This is a problem because
2405  * the orphan dir stringifies the inode block number to come up with it's
2406  * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2407  * problem. This function works around it by calling deeper into the orphan
2408  * and suballoc code than other callers. Use this only by necessity.
2409  * @dir: The directory which this inode will ultimately wind up under - not the
2410  * orphan dir!
2411  * @dir_bh: buffer_head the @dir inode block
2412  * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2413  * with the string to be used for orphan dirent. Pass back to the orphan dir
2414  * code.
2415  * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2416  * dir code.
2417  * @ret_di_blkno: block number where the new inode will be allocated.
2418  * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2419  * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2420  *
2421  * Returns zero on success and the ret_orphan_dir, name and lookup
2422  * fields will be populated.
2423  *
2424  * Returns non-zero on failure. 
2425  */
2426 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2427                                         struct buffer_head *dir_bh,
2428                                         char *orphan_name,
2429                                         struct inode **ret_orphan_dir,
2430                                         u64 *ret_di_blkno,
2431                                         struct ocfs2_dir_lookup_result *orphan_insert,
2432                                         struct ocfs2_alloc_context **ret_inode_ac)
2433 {
2434         int ret;
2435         u64 di_blkno;
2436         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2437         struct inode *orphan_dir = NULL;
2438         struct buffer_head *orphan_dir_bh = NULL;
2439         struct ocfs2_alloc_context *inode_ac = NULL;
2440 
2441         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2442         if (ret < 0) {
2443                 mlog_errno(ret);
2444                 return ret;
2445         }
2446 
2447         /* reserve an inode spot */
2448         ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2449         if (ret < 0) {
2450                 if (ret != -ENOSPC)
2451                         mlog_errno(ret);
2452                 goto out;
2453         }
2454 
2455         ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2456                                        &di_blkno);
2457         if (ret) {
2458                 mlog_errno(ret);
2459                 goto out;
2460         }
2461 
2462         ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2463                                          di_blkno, orphan_name, orphan_insert,
2464                                          false);
2465         if (ret < 0) {
2466                 mlog_errno(ret);
2467                 goto out;
2468         }
2469 
2470 out:
2471         if (ret == 0) {
2472                 *ret_orphan_dir = orphan_dir;
2473                 *ret_di_blkno = di_blkno;
2474                 *ret_inode_ac = inode_ac;
2475                 /*
2476                  * orphan_name and orphan_insert are already up to
2477                  * date via prepare_orphan_dir
2478                  */
2479         } else {
2480                 /* Unroll reserve_new_inode* */
2481                 if (inode_ac)
2482                         ocfs2_free_alloc_context(inode_ac);
2483 
2484                 /* Unroll orphan dir locking */
2485                 inode_unlock(orphan_dir);
2486                 ocfs2_inode_unlock(orphan_dir, 1);
2487                 iput(orphan_dir);
2488         }
2489 
2490         brelse(orphan_dir_bh);
2491 
2492         return ret;
2493 }
2494 
2495 int ocfs2_create_inode_in_orphan(struct inode *dir,
2496                                  int mode,
2497                                  struct inode **new_inode)
2498 {
2499         int status, did_quota_inode = 0;
2500         struct inode *inode = NULL;
2501         struct inode *orphan_dir = NULL;
2502         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2503         struct ocfs2_dinode *di = NULL;
2504         handle_t *handle = NULL;
2505         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2506         struct buffer_head *parent_di_bh = NULL;
2507         struct buffer_head *new_di_bh = NULL;
2508         struct ocfs2_alloc_context *inode_ac = NULL;
2509         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2510         u64 uninitialized_var(di_blkno), suballoc_loc;
2511         u16 suballoc_bit;
2512 
2513         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2514         if (status < 0) {
2515                 if (status != -ENOENT)
2516                         mlog_errno(status);
2517                 return status;
2518         }
2519 
2520         status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2521                                               orphan_name, &orphan_dir,
2522                                               &di_blkno, &orphan_insert, &inode_ac);
2523         if (status < 0) {
2524                 if (status != -ENOSPC)
2525                         mlog_errno(status);
2526                 goto leave;
2527         }
2528 
2529         inode = ocfs2_get_init_inode(dir, mode);
2530         if (IS_ERR(inode)) {
2531                 status = PTR_ERR(inode);
2532                 inode = NULL;
2533                 mlog_errno(status);
2534                 goto leave;
2535         }
2536 
2537         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2538         if (IS_ERR(handle)) {
2539                 status = PTR_ERR(handle);
2540                 handle = NULL;
2541                 mlog_errno(status);
2542                 goto leave;
2543         }
2544 
2545         status = dquot_alloc_inode(inode);
2546         if (status)
2547                 goto leave;
2548         did_quota_inode = 1;
2549 
2550         status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2551                                               &suballoc_loc,
2552                                               &suballoc_bit, di_blkno);
2553         if (status < 0) {
2554                 mlog_errno(status);
2555                 goto leave;
2556         }
2557 
2558         clear_nlink(inode);
2559         /* do the real work now. */
2560         status = __ocfs2_mknod_locked(dir, inode,
2561                                       0, &new_di_bh, parent_di_bh, handle,
2562                                       inode_ac, di_blkno, suballoc_loc,
2563                                       suballoc_bit);
2564         if (status < 0) {
2565                 mlog_errno(status);
2566                 goto leave;
2567         }
2568 
2569         di = (struct ocfs2_dinode *)new_di_bh->b_data;
2570         status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2571                                   &orphan_insert, orphan_dir, false);
2572         if (status < 0) {
2573                 mlog_errno(status);
2574                 goto leave;
2575         }
2576 
2577         /* get open lock so that only nodes can't remove it from orphan dir. */
2578         status = ocfs2_open_lock(inode);
2579         if (status < 0)
2580                 mlog_errno(status);
2581 
2582         insert_inode_hash(inode);
2583 leave:
2584         if (status < 0 && did_quota_inode)
2585                 dquot_free_inode(inode);
2586         if (handle)
2587                 ocfs2_commit_trans(osb, handle);
2588 
2589         if (orphan_dir) {
2590                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2591                 ocfs2_inode_unlock(orphan_dir, 1);
2592                 inode_unlock(orphan_dir);
2593                 iput(orphan_dir);
2594         }
2595 
2596         if ((status < 0) && inode) {
2597                 clear_nlink(inode);
2598                 iput(inode);
2599         }
2600 
2601         if (inode_ac)
2602                 ocfs2_free_alloc_context(inode_ac);
2603 
2604         brelse(new_di_bh);
2605 
2606         if (!status)
2607                 *new_inode = inode;
2608 
2609         ocfs2_free_dir_lookup_result(&orphan_insert);
2610 
2611         ocfs2_inode_unlock(dir, 1);
2612         brelse(parent_di_bh);
2613         return status;
2614 }
2615 
2616 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
2617         struct inode *inode)
2618 {
2619         char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2620         struct inode *orphan_dir_inode = NULL;
2621         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2622         struct buffer_head *di_bh = NULL;
2623         int status = 0;
2624         handle_t *handle = NULL;
2625         struct ocfs2_dinode *di = NULL;
2626 
2627         status = ocfs2_inode_lock(inode, &di_bh, 1);
2628         if (status < 0) {
2629                 mlog_errno(status);
2630                 goto bail;
2631         }
2632 
2633         di = (struct ocfs2_dinode *) di_bh->b_data;
2634         /*
2635          * Another append dio crashed?
2636          * If so, manually recover it first.
2637          */
2638         if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
2639                 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode));
2640                 if (status < 0) {
2641                         if (status != -ENOSPC)
2642                                 mlog_errno(status);
2643                         goto bail_unlock_inode;
2644                 }
2645 
2646                 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0);
2647                 if (status < 0) {
2648                         mlog_errno(status);
2649                         goto bail_unlock_inode;
2650                 }
2651         }
2652 
2653         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
2654                         OCFS2_I(inode)->ip_blkno,
2655                         orphan_name,
2656                         &orphan_insert,
2657                         true);
2658         if (status < 0) {
2659                 mlog_errno(status);
2660                 goto bail_unlock_inode;
2661         }
2662 
2663         handle = ocfs2_start_trans(osb,
2664                         OCFS2_INODE_ADD_TO_ORPHAN_CREDITS);
2665         if (IS_ERR(handle)) {
2666                 status = PTR_ERR(handle);
2667                 goto bail_unlock_orphan;
2668         }
2669 
2670         status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
2671                         &orphan_insert, orphan_dir_inode, true);
2672         if (status)
2673                 mlog_errno(status);
2674 
2675         ocfs2_commit_trans(osb, handle);
2676 
2677 bail_unlock_orphan:
2678         ocfs2_inode_unlock(orphan_dir_inode, 1);
2679         inode_unlock(orphan_dir_inode);
2680         iput(orphan_dir_inode);
2681 
2682         ocfs2_free_dir_lookup_result(&orphan_insert);
2683 
2684 bail_unlock_inode:
2685         ocfs2_inode_unlock(inode, 1);
2686         brelse(di_bh);
2687 
2688 bail:
2689         return status;
2690 }
2691 
2692 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
2693                 struct inode *inode, struct buffer_head *di_bh,
2694                 int update_isize, loff_t end)
2695 {
2696         struct inode *orphan_dir_inode = NULL;
2697         struct buffer_head *orphan_dir_bh = NULL;
2698         struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2699         handle_t *handle = NULL;
2700         int status = 0;
2701 
2702         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2703                         ORPHAN_DIR_SYSTEM_INODE,
2704                         le16_to_cpu(di->i_dio_orphaned_slot));
2705         if (!orphan_dir_inode) {
2706                 status = -ENOENT;
2707                 mlog_errno(status);
2708                 goto bail;
2709         }
2710 
2711         inode_lock(orphan_dir_inode);
2712         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2713         if (status < 0) {
2714                 inode_unlock(orphan_dir_inode);
2715                 iput(orphan_dir_inode);
2716                 mlog_errno(status);
2717                 goto bail;
2718         }
2719 
2720         handle = ocfs2_start_trans(osb,
2721                         OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS);
2722         if (IS_ERR(handle)) {
2723                 status = PTR_ERR(handle);
2724                 goto bail_unlock_orphan;
2725         }
2726 
2727         BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)));
2728 
2729         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
2730                                 inode, orphan_dir_bh, true);
2731         if (status < 0) {
2732                 mlog_errno(status);
2733                 goto bail_commit;
2734         }
2735 
2736         status = ocfs2_journal_access_di(handle,
2737                         INODE_CACHE(inode),
2738                         di_bh,
2739                         OCFS2_JOURNAL_ACCESS_WRITE);
2740         if (status < 0) {
2741                 mlog_errno(status);
2742                 goto bail_commit;
2743         }
2744 
2745         di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2746         di->i_dio_orphaned_slot = 0;
2747 
2748         if (update_isize) {
2749                 status = ocfs2_set_inode_size(handle, inode, di_bh, end);
2750                 if (status)
2751                         mlog_errno(status);
2752         } else
2753                 ocfs2_journal_dirty(handle, di_bh);
2754 
2755 bail_commit:
2756         ocfs2_commit_trans(osb, handle);
2757 
2758 bail_unlock_orphan:
2759         ocfs2_inode_unlock(orphan_dir_inode, 1);
2760         inode_unlock(orphan_dir_inode);
2761         brelse(orphan_dir_bh);
2762         iput(orphan_dir_inode);
2763 
2764 bail:
2765         return status;
2766 }
2767 
2768 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2769                                    struct inode *inode,
2770                                    struct dentry *dentry)
2771 {
2772         int status = 0;
2773         struct buffer_head *parent_di_bh = NULL;
2774         handle_t *handle = NULL;
2775         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2776         struct ocfs2_dinode *dir_di, *di;
2777         struct inode *orphan_dir_inode = NULL;
2778         struct buffer_head *orphan_dir_bh = NULL;
2779         struct buffer_head *di_bh = NULL;
2780         struct ocfs2_dir_lookup_result lookup = { NULL, };
2781 
2782         trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2783                                 dentry->d_name.len, dentry->d_name.name,
2784                                 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2785                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2786 
2787         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2788         if (status < 0) {
2789                 if (status != -ENOENT)
2790                         mlog_errno(status);
2791                 return status;
2792         }
2793 
2794         dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2795         if (!dir_di->i_links_count) {
2796                 /* can't make a file in a deleted directory. */
2797                 status = -ENOENT;
2798                 goto leave;
2799         }
2800 
2801         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2802                                            dentry->d_name.len);
2803         if (status)
2804                 goto leave;
2805 
2806         /* get a spot inside the dir. */
2807         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2808                                               dentry->d_name.name,
2809                                               dentry->d_name.len, &lookup);
2810         if (status < 0) {
2811                 mlog_errno(status);
2812                 goto leave;
2813         }
2814 
2815         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2816                                                        ORPHAN_DIR_SYSTEM_INODE,
2817                                                        osb->slot_num);
2818         if (!orphan_dir_inode) {
2819                 status = -ENOENT;
2820                 mlog_errno(status);
2821                 goto leave;
2822         }
2823 
2824         inode_lock(orphan_dir_inode);
2825 
2826         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2827         if (status < 0) {
2828                 mlog_errno(status);
2829                 inode_unlock(orphan_dir_inode);
2830                 iput(orphan_dir_inode);
2831                 goto leave;
2832         }
2833 
2834         status = ocfs2_read_inode_block(inode, &di_bh);
2835         if (status < 0) {
2836                 mlog_errno(status);
2837                 goto orphan_unlock;
2838         }
2839 
2840         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2841         if (IS_ERR(handle)) {
2842                 status = PTR_ERR(handle);
2843                 handle = NULL;
2844                 mlog_errno(status);
2845                 goto orphan_unlock;
2846         }
2847 
2848         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2849                                          di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2850         if (status < 0) {
2851                 mlog_errno(status);
2852                 goto out_commit;
2853         }
2854 
2855         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2856                                   orphan_dir_bh, false);
2857         if (status < 0) {
2858                 mlog_errno(status);
2859                 goto out_commit;
2860         }
2861 
2862         di = (struct ocfs2_dinode *)di_bh->b_data;
2863         di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2864         di->i_orphaned_slot = 0;
2865         set_nlink(inode, 1);
2866         ocfs2_set_links_count(di, inode->i_nlink);
2867         ocfs2_update_inode_fsync_trans(handle, inode, 1);
2868         ocfs2_journal_dirty(handle, di_bh);
2869 
2870         status = ocfs2_add_entry(handle, dentry, inode,
2871                                  OCFS2_I(inode)->ip_blkno, parent_di_bh,
2872                                  &lookup);
2873         if (status < 0) {
2874                 mlog_errno(status);
2875                 goto out_commit;
2876         }
2877 
2878         status = ocfs2_dentry_attach_lock(dentry, inode,
2879                                           OCFS2_I(dir)->ip_blkno);
2880         if (status) {
2881                 mlog_errno(status);
2882                 goto out_commit;
2883         }
2884 
2885         d_instantiate(dentry, inode);
2886         status = 0;
2887 out_commit:
2888         ocfs2_commit_trans(osb, handle);
2889 orphan_unlock:
2890         ocfs2_inode_unlock(orphan_dir_inode, 1);
2891         inode_unlock(orphan_dir_inode);
2892         iput(orphan_dir_inode);
2893 leave:
2894 
2895         ocfs2_inode_unlock(dir, 1);
2896 
2897         brelse(di_bh);
2898         brelse(parent_di_bh);
2899         brelse(orphan_dir_bh);
2900 
2901         ocfs2_free_dir_lookup_result(&lookup);
2902 
2903         if (status)
2904                 mlog_errno(status);
2905 
2906         return status;
2907 }
2908 
2909 const struct inode_operations ocfs2_dir_iops = {
2910         .create         = ocfs2_create,
2911         .lookup         = ocfs2_lookup,
2912         .link           = ocfs2_link,
2913         .unlink         = ocfs2_unlink,
2914         .rmdir          = ocfs2_unlink,
2915         .symlink        = ocfs2_symlink,
2916         .mkdir          = ocfs2_mkdir,
2917         .mknod          = ocfs2_mknod,
2918         .rename         = ocfs2_rename,
2919         .setattr        = ocfs2_setattr,
2920         .getattr        = ocfs2_getattr,
2921         .permission     = ocfs2_permission,
2922         .listxattr      = ocfs2_listxattr,
2923         .fiemap         = ocfs2_fiemap,
2924         .get_acl        = ocfs2_iop_get_acl,
2925         .set_acl        = ocfs2_iop_set_acl,
2926 };
2927 

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