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

Version: ~ [ linux-5.2 ] ~ [ linux-5.1.16 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.57 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.132 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.184 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.184 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.69 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.39.4 ] ~ [ linux-2.6.38.8 ] ~ [ linux-2.6.37.6 ] ~ [ linux-2.6.36.4 ] ~ [ linux-2.6.35.14 ] ~ [ linux-2.6.34.15 ] ~ [ linux-2.6.33.20 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
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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 
 84 static int ocfs2_orphan_add(struct ocfs2_super *osb,
 85                             handle_t *handle,
 86                             struct inode *inode,
 87                             struct buffer_head *fe_bh,
 88                             char *name,
 89                             struct ocfs2_dir_lookup_result *lookup,
 90                             struct inode *orphan_dir_inode);
 91 
 92 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
 93                                      handle_t *handle,
 94                                      struct inode *inode,
 95                                      const char *symname);
 96 
 97 /* An orphan dir name is an 8 byte value, printed as a hex string */
 98 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
 99 
100 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
101                                    unsigned int flags)
102 {
103         int status;
104         u64 blkno;
105         struct inode *inode = NULL;
106         struct dentry *ret;
107         struct ocfs2_inode_info *oi;
108 
109         trace_ocfs2_lookup(dir, dentry, dentry->d_name.len,
110                            dentry->d_name.name,
111                            (unsigned long long)OCFS2_I(dir)->ip_blkno, 0);
112 
113         if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
114                 ret = ERR_PTR(-ENAMETOOLONG);
115                 goto bail;
116         }
117 
118         status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
119         if (status < 0) {
120                 if (status != -ENOENT)
121                         mlog_errno(status);
122                 ret = ERR_PTR(status);
123                 goto bail;
124         }
125 
126         status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
127                                             dentry->d_name.len, &blkno);
128         if (status < 0)
129                 goto bail_add;
130 
131         inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
132         if (IS_ERR(inode)) {
133                 ret = ERR_PTR(-EACCES);
134                 goto bail_unlock;
135         }
136 
137         oi = OCFS2_I(inode);
138         /* Clear any orphaned state... If we were able to look up the
139          * inode from a directory, it certainly can't be orphaned. We
140          * might have the bad state from a node which intended to
141          * orphan this inode but crashed before it could commit the
142          * unlink. */
143         spin_lock(&oi->ip_lock);
144         oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
145         spin_unlock(&oi->ip_lock);
146 
147 bail_add:
148         ret = d_splice_alias(inode, dentry);
149 
150         if (inode) {
151                 /*
152                  * If d_splice_alias() finds a DCACHE_DISCONNECTED
153                  * dentry, it will d_move() it on top of ourse. The
154                  * return value will indicate this however, so in
155                  * those cases, we switch them around for the locking
156                  * code.
157                  *
158                  * NOTE: This dentry already has ->d_op set from
159                  * ocfs2_get_parent() and ocfs2_get_dentry()
160                  */
161                 if (ret)
162                         dentry = ret;
163 
164                 status = ocfs2_dentry_attach_lock(dentry, inode,
165                                                   OCFS2_I(dir)->ip_blkno);
166                 if (status) {
167                         mlog_errno(status);
168                         ret = ERR_PTR(status);
169                         goto bail_unlock;
170                 }
171         } else
172                 ocfs2_dentry_attach_gen(dentry);
173 
174 bail_unlock:
175         /* Don't drop the cluster lock until *after* the d_add --
176          * unlink on another node will message us to remove that
177          * dentry under this lock so otherwise we can race this with
178          * the downconvert thread and have a stale dentry. */
179         ocfs2_inode_unlock(dir, 0);
180 
181 bail:
182 
183         trace_ocfs2_lookup_ret(ret);
184 
185         return ret;
186 }
187 
188 static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode)
189 {
190         struct inode *inode;
191 
192         inode = new_inode(dir->i_sb);
193         if (!inode) {
194                 mlog(ML_ERROR, "new_inode failed!\n");
195                 return NULL;
196         }
197 
198         /* populate as many fields early on as possible - many of
199          * these are used by the support functions here and in
200          * callers. */
201         if (S_ISDIR(mode))
202                 set_nlink(inode, 2);
203         inode_init_owner(inode, dir, mode);
204         dquot_initialize(inode);
205         return inode;
206 }
207 
208 static int ocfs2_mknod(struct inode *dir,
209                        struct dentry *dentry,
210                        umode_t mode,
211                        dev_t dev)
212 {
213         int status = 0;
214         struct buffer_head *parent_fe_bh = NULL;
215         handle_t *handle = NULL;
216         struct ocfs2_super *osb;
217         struct ocfs2_dinode *dirfe;
218         struct buffer_head *new_fe_bh = NULL;
219         struct inode *inode = NULL;
220         struct ocfs2_alloc_context *inode_ac = NULL;
221         struct ocfs2_alloc_context *data_ac = NULL;
222         struct ocfs2_alloc_context *meta_ac = NULL;
223         int want_clusters = 0;
224         int want_meta = 0;
225         int xattr_credits = 0;
226         struct ocfs2_security_xattr_info si = {
227                 .enable = 1,
228         };
229         int did_quota_inode = 0;
230         struct ocfs2_dir_lookup_result lookup = { NULL, };
231         sigset_t oldset;
232         int did_block_signals = 0;
233 
234         trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
235                           (unsigned long long)OCFS2_I(dir)->ip_blkno,
236                           (unsigned long)dev, mode);
237 
238         dquot_initialize(dir);
239 
240         /* get our super block */
241         osb = OCFS2_SB(dir->i_sb);
242 
243         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
244         if (status < 0) {
245                 if (status != -ENOENT)
246                         mlog_errno(status);
247                 return status;
248         }
249 
250         if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
251                 status = -EMLINK;
252                 goto leave;
253         }
254 
255         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
256         if (!ocfs2_read_links_count(dirfe)) {
257                 /* can't make a file in a deleted directory. */
258                 status = -ENOENT;
259                 goto leave;
260         }
261 
262         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
263                                            dentry->d_name.len);
264         if (status)
265                 goto leave;
266 
267         /* get a spot inside the dir. */
268         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
269                                               dentry->d_name.name,
270                                               dentry->d_name.len, &lookup);
271         if (status < 0) {
272                 mlog_errno(status);
273                 goto leave;
274         }
275 
276         /* reserve an inode spot */
277         status = ocfs2_reserve_new_inode(osb, &inode_ac);
278         if (status < 0) {
279                 if (status != -ENOSPC)
280                         mlog_errno(status);
281                 goto leave;
282         }
283 
284         inode = ocfs2_get_init_inode(dir, mode);
285         if (!inode) {
286                 status = -ENOMEM;
287                 mlog_errno(status);
288                 goto leave;
289         }
290 
291         /* get security xattr */
292         status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
293         if (status) {
294                 if (status == -EOPNOTSUPP)
295                         si.enable = 0;
296                 else {
297                         mlog_errno(status);
298                         goto leave;
299                 }
300         }
301 
302         /* calculate meta data/clusters for setting security and acl xattr */
303         status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
304                                        &si, &want_clusters,
305                                        &xattr_credits, &want_meta);
306         if (status < 0) {
307                 mlog_errno(status);
308                 goto leave;
309         }
310 
311         /* Reserve a cluster if creating an extent based directory. */
312         if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
313                 want_clusters += 1;
314 
315                 /* Dir indexing requires extra space as well */
316                 if (ocfs2_supports_indexed_dirs(osb))
317                         want_meta++;
318         }
319 
320         status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
321         if (status < 0) {
322                 if (status != -ENOSPC)
323                         mlog_errno(status);
324                 goto leave;
325         }
326 
327         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
328         if (status < 0) {
329                 if (status != -ENOSPC)
330                         mlog_errno(status);
331                 goto leave;
332         }
333 
334         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
335                                                             S_ISDIR(mode),
336                                                             xattr_credits));
337         if (IS_ERR(handle)) {
338                 status = PTR_ERR(handle);
339                 handle = NULL;
340                 mlog_errno(status);
341                 goto leave;
342         }
343 
344         /* Starting to change things, restart is no longer possible. */
345         ocfs2_block_signals(&oldset);
346         did_block_signals = 1;
347 
348         status = dquot_alloc_inode(inode);
349         if (status)
350                 goto leave;
351         did_quota_inode = 1;
352 
353         /* do the real work now. */
354         status = ocfs2_mknod_locked(osb, dir, inode, dev,
355                                     &new_fe_bh, parent_fe_bh, handle,
356                                     inode_ac);
357         if (status < 0) {
358                 mlog_errno(status);
359                 goto leave;
360         }
361 
362         if (S_ISDIR(mode)) {
363                 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
364                                             new_fe_bh, data_ac, meta_ac);
365                 if (status < 0) {
366                         mlog_errno(status);
367                         goto leave;
368                 }
369 
370                 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
371                                                  parent_fe_bh,
372                                                  OCFS2_JOURNAL_ACCESS_WRITE);
373                 if (status < 0) {
374                         mlog_errno(status);
375                         goto leave;
376                 }
377                 ocfs2_add_links_count(dirfe, 1);
378                 ocfs2_journal_dirty(handle, parent_fe_bh);
379                 inc_nlink(dir);
380         }
381 
382         status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
383                                 meta_ac, data_ac);
384         if (status < 0) {
385                 mlog_errno(status);
386                 goto leave;
387         }
388 
389         if (si.enable) {
390                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
391                                                  meta_ac, data_ac);
392                 if (status < 0) {
393                         mlog_errno(status);
394                         goto leave;
395                 }
396         }
397 
398         /*
399          * Do this before adding the entry to the directory. We add
400          * also set d_op after success so that ->d_iput() will cleanup
401          * the dentry lock even if ocfs2_add_entry() fails below.
402          */
403         status = ocfs2_dentry_attach_lock(dentry, inode,
404                                           OCFS2_I(dir)->ip_blkno);
405         if (status) {
406                 mlog_errno(status);
407                 goto leave;
408         }
409 
410         status = ocfs2_add_entry(handle, dentry, inode,
411                                  OCFS2_I(inode)->ip_blkno, parent_fe_bh,
412                                  &lookup);
413         if (status < 0) {
414                 mlog_errno(status);
415                 goto leave;
416         }
417 
418         insert_inode_hash(inode);
419         d_instantiate(dentry, inode);
420         status = 0;
421 leave:
422         if (status < 0 && did_quota_inode)
423                 dquot_free_inode(inode);
424         if (handle)
425                 ocfs2_commit_trans(osb, handle);
426 
427         ocfs2_inode_unlock(dir, 1);
428         if (did_block_signals)
429                 ocfs2_unblock_signals(&oldset);
430 
431         brelse(new_fe_bh);
432         brelse(parent_fe_bh);
433         kfree(si.name);
434         kfree(si.value);
435 
436         ocfs2_free_dir_lookup_result(&lookup);
437 
438         if (inode_ac)
439                 ocfs2_free_alloc_context(inode_ac);
440 
441         if (data_ac)
442                 ocfs2_free_alloc_context(data_ac);
443 
444         if (meta_ac)
445                 ocfs2_free_alloc_context(meta_ac);
446 
447         /*
448          * We should call iput after the i_mutex of the bitmap been
449          * unlocked in ocfs2_free_alloc_context, or the
450          * ocfs2_delete_inode will mutex_lock again.
451          */
452         if ((status < 0) && inode) {
453                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
454                 clear_nlink(inode);
455                 iput(inode);
456         }
457 
458         if (status)
459                 mlog_errno(status);
460 
461         return status;
462 }
463 
464 static int __ocfs2_mknod_locked(struct inode *dir,
465                                 struct inode *inode,
466                                 dev_t dev,
467                                 struct buffer_head **new_fe_bh,
468                                 struct buffer_head *parent_fe_bh,
469                                 handle_t *handle,
470                                 struct ocfs2_alloc_context *inode_ac,
471                                 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
472 {
473         int status = 0;
474         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
475         struct ocfs2_dinode *fe = NULL;
476         struct ocfs2_extent_list *fel;
477         u16 feat;
478 
479         *new_fe_bh = NULL;
480 
481         /* populate as many fields early on as possible - many of
482          * these are used by the support functions here and in
483          * callers. */
484         inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
485         OCFS2_I(inode)->ip_blkno = fe_blkno;
486         spin_lock(&osb->osb_lock);
487         inode->i_generation = osb->s_next_generation++;
488         spin_unlock(&osb->osb_lock);
489 
490         *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
491         if (!*new_fe_bh) {
492                 status = -EIO;
493                 mlog_errno(status);
494                 goto leave;
495         }
496         ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
497 
498         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
499                                          *new_fe_bh,
500                                          OCFS2_JOURNAL_ACCESS_CREATE);
501         if (status < 0) {
502                 mlog_errno(status);
503                 goto leave;
504         }
505 
506         fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
507         memset(fe, 0, osb->sb->s_blocksize);
508 
509         fe->i_generation = cpu_to_le32(inode->i_generation);
510         fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
511         fe->i_blkno = cpu_to_le64(fe_blkno);
512         fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
513         fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
514         fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
515         fe->i_uid = cpu_to_le32(i_uid_read(inode));
516         fe->i_gid = cpu_to_le32(i_gid_read(inode));
517         fe->i_mode = cpu_to_le16(inode->i_mode);
518         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
519                 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
520 
521         ocfs2_set_links_count(fe, inode->i_nlink);
522 
523         fe->i_last_eb_blk = 0;
524         strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
525         le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL);
526         fe->i_atime = fe->i_ctime = fe->i_mtime =
527                 cpu_to_le64(CURRENT_TIME.tv_sec);
528         fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
529                 cpu_to_le32(CURRENT_TIME.tv_nsec);
530         fe->i_dtime = 0;
531 
532         /*
533          * If supported, directories start with inline data. If inline
534          * isn't supported, but indexing is, we start them as indexed.
535          */
536         feat = le16_to_cpu(fe->i_dyn_features);
537         if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
538                 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
539 
540                 fe->id2.i_data.id_count = cpu_to_le16(
541                                 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
542         } else {
543                 fel = &fe->id2.i_list;
544                 fel->l_tree_depth = 0;
545                 fel->l_next_free_rec = 0;
546                 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
547         }
548 
549         ocfs2_journal_dirty(handle, *new_fe_bh);
550 
551         ocfs2_populate_inode(inode, fe, 1);
552         ocfs2_ci_set_new(osb, INODE_CACHE(inode));
553         if (!ocfs2_mount_local(osb)) {
554                 status = ocfs2_create_new_inode_locks(inode);
555                 if (status < 0)
556                         mlog_errno(status);
557         }
558 
559         status = 0; /* error in ocfs2_create_new_inode_locks is not
560                      * critical */
561 
562 leave:
563         if (status < 0) {
564                 if (*new_fe_bh) {
565                         brelse(*new_fe_bh);
566                         *new_fe_bh = NULL;
567                 }
568         }
569 
570         if (status)
571                 mlog_errno(status);
572         return status;
573 }
574 
575 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
576                               struct inode *dir,
577                               struct inode *inode,
578                               dev_t dev,
579                               struct buffer_head **new_fe_bh,
580                               struct buffer_head *parent_fe_bh,
581                               handle_t *handle,
582                               struct ocfs2_alloc_context *inode_ac)
583 {
584         int status = 0;
585         u64 suballoc_loc, fe_blkno = 0;
586         u16 suballoc_bit;
587 
588         *new_fe_bh = NULL;
589 
590         status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
591                                        inode_ac, &suballoc_loc,
592                                        &suballoc_bit, &fe_blkno);
593         if (status < 0) {
594                 mlog_errno(status);
595                 return status;
596         }
597 
598         return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
599                                     parent_fe_bh, handle, inode_ac,
600                                     fe_blkno, suballoc_loc, suballoc_bit);
601 }
602 
603 static int ocfs2_mkdir(struct inode *dir,
604                        struct dentry *dentry,
605                        umode_t mode)
606 {
607         int ret;
608 
609         trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
610                           OCFS2_I(dir)->ip_blkno, mode);
611         ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
612         if (ret)
613                 mlog_errno(ret);
614 
615         return ret;
616 }
617 
618 static int ocfs2_create(struct inode *dir,
619                         struct dentry *dentry,
620                         umode_t mode,
621                         bool excl)
622 {
623         int ret;
624 
625         trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
626                            (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
627         ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
628         if (ret)
629                 mlog_errno(ret);
630 
631         return ret;
632 }
633 
634 static int ocfs2_link(struct dentry *old_dentry,
635                       struct inode *dir,
636                       struct dentry *dentry)
637 {
638         handle_t *handle;
639         struct inode *inode = old_dentry->d_inode;
640         int err;
641         struct buffer_head *fe_bh = NULL;
642         struct buffer_head *parent_fe_bh = NULL;
643         struct ocfs2_dinode *fe = NULL;
644         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
645         struct ocfs2_dir_lookup_result lookup = { NULL, };
646         sigset_t oldset;
647 
648         trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
649                          old_dentry->d_name.len, old_dentry->d_name.name,
650                          dentry->d_name.len, dentry->d_name.name);
651 
652         if (S_ISDIR(inode->i_mode))
653                 return -EPERM;
654 
655         dquot_initialize(dir);
656 
657         err = ocfs2_inode_lock_nested(dir, &parent_fe_bh, 1, OI_LS_PARENT);
658         if (err < 0) {
659                 if (err != -ENOENT)
660                         mlog_errno(err);
661                 return err;
662         }
663 
664         if (!dir->i_nlink) {
665                 err = -ENOENT;
666                 goto out;
667         }
668 
669         err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
670                                         dentry->d_name.len);
671         if (err)
672                 goto out;
673 
674         err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
675                                            dentry->d_name.name,
676                                            dentry->d_name.len, &lookup);
677         if (err < 0) {
678                 mlog_errno(err);
679                 goto out;
680         }
681 
682         err = ocfs2_inode_lock(inode, &fe_bh, 1);
683         if (err < 0) {
684                 if (err != -ENOENT)
685                         mlog_errno(err);
686                 goto out;
687         }
688 
689         fe = (struct ocfs2_dinode *) fe_bh->b_data;
690         if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
691                 err = -EMLINK;
692                 goto out_unlock_inode;
693         }
694 
695         handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
696         if (IS_ERR(handle)) {
697                 err = PTR_ERR(handle);
698                 handle = NULL;
699                 mlog_errno(err);
700                 goto out_unlock_inode;
701         }
702 
703         /* Starting to change things, restart is no longer possible. */
704         ocfs2_block_signals(&oldset);
705 
706         err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
707                                       OCFS2_JOURNAL_ACCESS_WRITE);
708         if (err < 0) {
709                 mlog_errno(err);
710                 goto out_commit;
711         }
712 
713         inc_nlink(inode);
714         inode->i_ctime = CURRENT_TIME;
715         ocfs2_set_links_count(fe, inode->i_nlink);
716         fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
717         fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
718         ocfs2_journal_dirty(handle, fe_bh);
719 
720         err = ocfs2_add_entry(handle, dentry, inode,
721                               OCFS2_I(inode)->ip_blkno,
722                               parent_fe_bh, &lookup);
723         if (err) {
724                 ocfs2_add_links_count(fe, -1);
725                 drop_nlink(inode);
726                 mlog_errno(err);
727                 goto out_commit;
728         }
729 
730         err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
731         if (err) {
732                 mlog_errno(err);
733                 goto out_commit;
734         }
735 
736         ihold(inode);
737         d_instantiate(dentry, inode);
738 
739 out_commit:
740         ocfs2_commit_trans(osb, handle);
741         ocfs2_unblock_signals(&oldset);
742 out_unlock_inode:
743         ocfs2_inode_unlock(inode, 1);
744 
745 out:
746         ocfs2_inode_unlock(dir, 1);
747 
748         brelse(fe_bh);
749         brelse(parent_fe_bh);
750 
751         ocfs2_free_dir_lookup_result(&lookup);
752 
753         if (err)
754                 mlog_errno(err);
755 
756         return err;
757 }
758 
759 /*
760  * Takes and drops an exclusive lock on the given dentry. This will
761  * force other nodes to drop it.
762  */
763 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
764 {
765         int ret;
766 
767         ret = ocfs2_dentry_lock(dentry, 1);
768         if (ret)
769                 mlog_errno(ret);
770         else
771                 ocfs2_dentry_unlock(dentry, 1);
772 
773         return ret;
774 }
775 
776 static inline int inode_is_unlinkable(struct inode *inode)
777 {
778         if (S_ISDIR(inode->i_mode)) {
779                 if (inode->i_nlink == 2)
780                         return 1;
781                 return 0;
782         }
783 
784         if (inode->i_nlink == 1)
785                 return 1;
786         return 0;
787 }
788 
789 static int ocfs2_unlink(struct inode *dir,
790                         struct dentry *dentry)
791 {
792         int status;
793         int child_locked = 0;
794         struct inode *inode = dentry->d_inode;
795         struct inode *orphan_dir = NULL;
796         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
797         u64 blkno;
798         struct ocfs2_dinode *fe = NULL;
799         struct buffer_head *fe_bh = NULL;
800         struct buffer_head *parent_node_bh = NULL;
801         handle_t *handle = NULL;
802         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
803         struct ocfs2_dir_lookup_result lookup = { NULL, };
804         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
805 
806         trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
807                            dentry->d_name.name,
808                            (unsigned long long)OCFS2_I(dir)->ip_blkno,
809                            (unsigned long long)OCFS2_I(inode)->ip_blkno);
810 
811         dquot_initialize(dir);
812 
813         BUG_ON(dentry->d_parent->d_inode != dir);
814 
815         if (inode == osb->root_inode)
816                 return -EPERM;
817 
818         status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
819                                          OI_LS_PARENT);
820         if (status < 0) {
821                 if (status != -ENOENT)
822                         mlog_errno(status);
823                 return status;
824         }
825 
826         status = ocfs2_find_files_on_disk(dentry->d_name.name,
827                                           dentry->d_name.len, &blkno, dir,
828                                           &lookup);
829         if (status < 0) {
830                 if (status != -ENOENT)
831                         mlog_errno(status);
832                 goto leave;
833         }
834 
835         if (OCFS2_I(inode)->ip_blkno != blkno) {
836                 status = -ENOENT;
837 
838                 trace_ocfs2_unlink_noent(
839                                 (unsigned long long)OCFS2_I(inode)->ip_blkno,
840                                 (unsigned long long)blkno,
841                                 OCFS2_I(inode)->ip_flags);
842                 goto leave;
843         }
844 
845         status = ocfs2_inode_lock(inode, &fe_bh, 1);
846         if (status < 0) {
847                 if (status != -ENOENT)
848                         mlog_errno(status);
849                 goto leave;
850         }
851         child_locked = 1;
852 
853         if (S_ISDIR(inode->i_mode)) {
854                 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
855                         status = -ENOTEMPTY;
856                         goto leave;
857                 }
858         }
859 
860         status = ocfs2_remote_dentry_delete(dentry);
861         if (status < 0) {
862                 /* This remote delete should succeed under all normal
863                  * circumstances. */
864                 mlog_errno(status);
865                 goto leave;
866         }
867 
868         if (inode_is_unlinkable(inode)) {
869                 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
870                                                   OCFS2_I(inode)->ip_blkno,
871                                                   orphan_name, &orphan_insert);
872                 if (status < 0) {
873                         mlog_errno(status);
874                         goto leave;
875                 }
876         }
877 
878         handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
879         if (IS_ERR(handle)) {
880                 status = PTR_ERR(handle);
881                 handle = NULL;
882                 mlog_errno(status);
883                 goto leave;
884         }
885 
886         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
887                                          OCFS2_JOURNAL_ACCESS_WRITE);
888         if (status < 0) {
889                 mlog_errno(status);
890                 goto leave;
891         }
892 
893         fe = (struct ocfs2_dinode *) fe_bh->b_data;
894 
895         if (inode_is_unlinkable(inode)) {
896                 status = ocfs2_orphan_add(osb, handle, inode, fe_bh, orphan_name,
897                                           &orphan_insert, orphan_dir);
898                 if (status < 0) {
899                         mlog_errno(status);
900                         goto leave;
901                 }
902         }
903 
904         /* delete the name from the parent dir */
905         status = ocfs2_delete_entry(handle, dir, &lookup);
906         if (status < 0) {
907                 mlog_errno(status);
908                 goto leave;
909         }
910 
911         if (S_ISDIR(inode->i_mode))
912                 drop_nlink(inode);
913         drop_nlink(inode);
914         ocfs2_set_links_count(fe, inode->i_nlink);
915         ocfs2_journal_dirty(handle, fe_bh);
916 
917         dir->i_ctime = dir->i_mtime = CURRENT_TIME;
918         if (S_ISDIR(inode->i_mode))
919                 drop_nlink(dir);
920 
921         status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
922         if (status < 0) {
923                 mlog_errno(status);
924                 if (S_ISDIR(inode->i_mode))
925                         inc_nlink(dir);
926         }
927 
928 leave:
929         if (handle)
930                 ocfs2_commit_trans(osb, handle);
931 
932         if (child_locked)
933                 ocfs2_inode_unlock(inode, 1);
934 
935         ocfs2_inode_unlock(dir, 1);
936 
937         if (orphan_dir) {
938                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
939                 ocfs2_inode_unlock(orphan_dir, 1);
940                 mutex_unlock(&orphan_dir->i_mutex);
941                 iput(orphan_dir);
942         }
943 
944         brelse(fe_bh);
945         brelse(parent_node_bh);
946 
947         ocfs2_free_dir_lookup_result(&orphan_insert);
948         ocfs2_free_dir_lookup_result(&lookup);
949 
950         if (status && (status != -ENOTEMPTY))
951                 mlog_errno(status);
952 
953         return status;
954 }
955 
956 /*
957  * The only place this should be used is rename!
958  * if they have the same id, then the 1st one is the only one locked.
959  */
960 static int ocfs2_double_lock(struct ocfs2_super *osb,
961                              struct buffer_head **bh1,
962                              struct inode *inode1,
963                              struct buffer_head **bh2,
964                              struct inode *inode2)
965 {
966         int status;
967         struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
968         struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
969         struct buffer_head **tmpbh;
970         struct inode *tmpinode;
971 
972         trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
973                                 (unsigned long long)oi2->ip_blkno);
974 
975         if (*bh1)
976                 *bh1 = NULL;
977         if (*bh2)
978                 *bh2 = NULL;
979 
980         /* we always want to lock the one with the lower lockid first. */
981         if (oi1->ip_blkno != oi2->ip_blkno) {
982                 if (oi1->ip_blkno < oi2->ip_blkno) {
983                         /* switch id1 and id2 around */
984                         tmpbh = bh2;
985                         bh2 = bh1;
986                         bh1 = tmpbh;
987 
988                         tmpinode = inode2;
989                         inode2 = inode1;
990                         inode1 = tmpinode;
991                 }
992                 /* lock id2 */
993                 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
994                                                  OI_LS_RENAME1);
995                 if (status < 0) {
996                         if (status != -ENOENT)
997                                 mlog_errno(status);
998                         goto bail;
999                 }
1000         }
1001 
1002         /* lock id1 */
1003         status = ocfs2_inode_lock_nested(inode1, bh1, 1, OI_LS_RENAME2);
1004         if (status < 0) {
1005                 /*
1006                  * An error return must mean that no cluster locks
1007                  * were held on function exit.
1008                  */
1009                 if (oi1->ip_blkno != oi2->ip_blkno) {
1010                         ocfs2_inode_unlock(inode2, 1);
1011                         brelse(*bh2);
1012                         *bh2 = NULL;
1013                 }
1014 
1015                 if (status != -ENOENT)
1016                         mlog_errno(status);
1017         }
1018 
1019         trace_ocfs2_double_lock_end(
1020                         (unsigned long long)OCFS2_I(inode1)->ip_blkno,
1021                         (unsigned long long)OCFS2_I(inode2)->ip_blkno);
1022 
1023 bail:
1024         if (status)
1025                 mlog_errno(status);
1026         return status;
1027 }
1028 
1029 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1030 {
1031         ocfs2_inode_unlock(inode1, 1);
1032 
1033         if (inode1 != inode2)
1034                 ocfs2_inode_unlock(inode2, 1);
1035 }
1036 
1037 static int ocfs2_rename(struct inode *old_dir,
1038                         struct dentry *old_dentry,
1039                         struct inode *new_dir,
1040                         struct dentry *new_dentry)
1041 {
1042         int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1043         int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1044         struct inode *old_inode = old_dentry->d_inode;
1045         struct inode *new_inode = new_dentry->d_inode;
1046         struct inode *orphan_dir = NULL;
1047         struct ocfs2_dinode *newfe = NULL;
1048         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1049         struct buffer_head *newfe_bh = NULL;
1050         struct buffer_head *old_inode_bh = NULL;
1051         struct ocfs2_super *osb = NULL;
1052         u64 newfe_blkno, old_de_ino;
1053         handle_t *handle = NULL;
1054         struct buffer_head *old_dir_bh = NULL;
1055         struct buffer_head *new_dir_bh = NULL;
1056         u32 old_dir_nlink = old_dir->i_nlink;
1057         struct ocfs2_dinode *old_di;
1058         struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1059         struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1060         struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1061         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1062         struct ocfs2_dir_lookup_result target_insert = { NULL, };
1063 
1064         /* At some point it might be nice to break this function up a
1065          * bit. */
1066 
1067         trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1068                            old_dentry->d_name.len, old_dentry->d_name.name,
1069                            new_dentry->d_name.len, new_dentry->d_name.name);
1070 
1071         dquot_initialize(old_dir);
1072         dquot_initialize(new_dir);
1073 
1074         osb = OCFS2_SB(old_dir->i_sb);
1075 
1076         if (new_inode) {
1077                 if (!igrab(new_inode))
1078                         BUG();
1079         }
1080 
1081         /* Assume a directory hierarchy thusly:
1082          * a/b/c
1083          * a/d
1084          * a,b,c, and d are all directories.
1085          *
1086          * from cwd of 'a' on both nodes:
1087          * node1: mv b/c d
1088          * node2: mv d   b/c
1089          *
1090          * And that's why, just like the VFS, we need a file system
1091          * rename lock. */
1092         if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1093                 status = ocfs2_rename_lock(osb);
1094                 if (status < 0) {
1095                         mlog_errno(status);
1096                         goto bail;
1097                 }
1098                 rename_lock = 1;
1099         }
1100 
1101         /* if old and new are the same, this'll just do one lock. */
1102         status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1103                                    &new_dir_bh, new_dir);
1104         if (status < 0) {
1105                 mlog_errno(status);
1106                 goto bail;
1107         }
1108         parents_locked = 1;
1109 
1110         /* make sure both dirs have bhs
1111          * get an extra ref on old_dir_bh if old==new */
1112         if (!new_dir_bh) {
1113                 if (old_dir_bh) {
1114                         new_dir_bh = old_dir_bh;
1115                         get_bh(new_dir_bh);
1116                 } else {
1117                         mlog(ML_ERROR, "no old_dir_bh!\n");
1118                         status = -EIO;
1119                         goto bail;
1120                 }
1121         }
1122 
1123         /*
1124          * Aside from allowing a meta data update, the locking here
1125          * also ensures that the downconvert thread on other nodes
1126          * won't have to concurrently downconvert the inode and the
1127          * dentry locks.
1128          */
1129         status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1130                                          OI_LS_PARENT);
1131         if (status < 0) {
1132                 if (status != -ENOENT)
1133                         mlog_errno(status);
1134                 goto bail;
1135         }
1136         old_child_locked = 1;
1137 
1138         status = ocfs2_remote_dentry_delete(old_dentry);
1139         if (status < 0) {
1140                 mlog_errno(status);
1141                 goto bail;
1142         }
1143 
1144         if (S_ISDIR(old_inode->i_mode)) {
1145                 u64 old_inode_parent;
1146 
1147                 update_dot_dot = 1;
1148                 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1149                                                   old_inode,
1150                                                   &old_inode_dot_dot_res);
1151                 if (status) {
1152                         status = -EIO;
1153                         goto bail;
1154                 }
1155 
1156                 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1157                         status = -EIO;
1158                         goto bail;
1159                 }
1160 
1161                 if (!new_inode && new_dir != old_dir &&
1162                     new_dir->i_nlink >= ocfs2_link_max(osb)) {
1163                         status = -EMLINK;
1164                         goto bail;
1165                 }
1166         }
1167 
1168         status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1169                                             old_dentry->d_name.len,
1170                                             &old_de_ino);
1171         if (status) {
1172                 status = -ENOENT;
1173                 goto bail;
1174         }
1175 
1176         /*
1177          *  Check for inode number is _not_ due to possible IO errors.
1178          *  We might rmdir the source, keep it as pwd of some process
1179          *  and merrily kill the link to whatever was created under the
1180          *  same name. Goodbye sticky bit ;-<
1181          */
1182         if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1183                 status = -ENOENT;
1184                 goto bail;
1185         }
1186 
1187         /* check if the target already exists (in which case we need
1188          * to delete it */
1189         status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1190                                           new_dentry->d_name.len,
1191                                           &newfe_blkno, new_dir,
1192                                           &target_lookup_res);
1193         /* The only error we allow here is -ENOENT because the new
1194          * file not existing is perfectly valid. */
1195         if ((status < 0) && (status != -ENOENT)) {
1196                 /* If we cannot find the file specified we should just */
1197                 /* return the error... */
1198                 mlog_errno(status);
1199                 goto bail;
1200         }
1201         if (status == 0)
1202                 target_exists = 1;
1203 
1204         if (!target_exists && new_inode) {
1205                 /*
1206                  * Target was unlinked by another node while we were
1207                  * waiting to get to ocfs2_rename(). There isn't
1208                  * anything we can do here to help the situation, so
1209                  * bubble up the appropriate error.
1210                  */
1211                 status = -ENOENT;
1212                 goto bail;
1213         }
1214 
1215         /* In case we need to overwrite an existing file, we blow it
1216          * away first */
1217         if (target_exists) {
1218                 /* VFS didn't think there existed an inode here, but
1219                  * someone else in the cluster must have raced our
1220                  * rename to create one. Today we error cleanly, in
1221                  * the future we should consider calling iget to build
1222                  * a new struct inode for this entry. */
1223                 if (!new_inode) {
1224                         status = -EACCES;
1225 
1226                         trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1227                                                 new_dentry->d_name.name);
1228                         goto bail;
1229                 }
1230 
1231                 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1232                         status = -EACCES;
1233 
1234                         trace_ocfs2_rename_disagree(
1235                              (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1236                              (unsigned long long)newfe_blkno,
1237                              OCFS2_I(new_inode)->ip_flags);
1238                         goto bail;
1239                 }
1240 
1241                 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1242                 if (status < 0) {
1243                         if (status != -ENOENT)
1244                                 mlog_errno(status);
1245                         goto bail;
1246                 }
1247                 new_child_locked = 1;
1248 
1249                 status = ocfs2_remote_dentry_delete(new_dentry);
1250                 if (status < 0) {
1251                         mlog_errno(status);
1252                         goto bail;
1253                 }
1254 
1255                 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1256 
1257                 trace_ocfs2_rename_over_existing(
1258                      (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1259                      (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1260 
1261                 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1262                         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1263                                                 OCFS2_I(new_inode)->ip_blkno,
1264                                                 orphan_name, &orphan_insert);
1265                         if (status < 0) {
1266                                 mlog_errno(status);
1267                                 goto bail;
1268                         }
1269                 }
1270         } else {
1271                 BUG_ON(new_dentry->d_parent->d_inode != new_dir);
1272 
1273                 status = ocfs2_check_dir_for_entry(new_dir,
1274                                                    new_dentry->d_name.name,
1275                                                    new_dentry->d_name.len);
1276                 if (status)
1277                         goto bail;
1278 
1279                 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1280                                                       new_dentry->d_name.name,
1281                                                       new_dentry->d_name.len,
1282                                                       &target_insert);
1283                 if (status < 0) {
1284                         mlog_errno(status);
1285                         goto bail;
1286                 }
1287         }
1288 
1289         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1290         if (IS_ERR(handle)) {
1291                 status = PTR_ERR(handle);
1292                 handle = NULL;
1293                 mlog_errno(status);
1294                 goto bail;
1295         }
1296 
1297         if (target_exists) {
1298                 if (S_ISDIR(new_inode->i_mode)) {
1299                         if (new_inode->i_nlink != 2 ||
1300                             !ocfs2_empty_dir(new_inode)) {
1301                                 status = -ENOTEMPTY;
1302                                 goto bail;
1303                         }
1304                 }
1305                 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1306                                                  newfe_bh,
1307                                                  OCFS2_JOURNAL_ACCESS_WRITE);
1308                 if (status < 0) {
1309                         mlog_errno(status);
1310                         goto bail;
1311                 }
1312 
1313                 if (S_ISDIR(new_inode->i_mode) ||
1314                     (ocfs2_read_links_count(newfe) == 1)) {
1315                         status = ocfs2_orphan_add(osb, handle, new_inode,
1316                                                   newfe_bh, orphan_name,
1317                                                   &orphan_insert, orphan_dir);
1318                         if (status < 0) {
1319                                 mlog_errno(status);
1320                                 goto bail;
1321                         }
1322                 }
1323 
1324                 /* change the dirent to point to the correct inode */
1325                 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1326                                             old_inode);
1327                 if (status < 0) {
1328                         mlog_errno(status);
1329                         goto bail;
1330                 }
1331                 new_dir->i_version++;
1332 
1333                 if (S_ISDIR(new_inode->i_mode))
1334                         ocfs2_set_links_count(newfe, 0);
1335                 else
1336                         ocfs2_add_links_count(newfe, -1);
1337                 ocfs2_journal_dirty(handle, newfe_bh);
1338         } else {
1339                 /* if the name was not found in new_dir, add it now */
1340                 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1341                                          OCFS2_I(old_inode)->ip_blkno,
1342                                          new_dir_bh, &target_insert);
1343         }
1344 
1345         old_inode->i_ctime = CURRENT_TIME;
1346         mark_inode_dirty(old_inode);
1347 
1348         status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1349                                          old_inode_bh,
1350                                          OCFS2_JOURNAL_ACCESS_WRITE);
1351         if (status >= 0) {
1352                 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1353 
1354                 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1355                 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1356                 ocfs2_journal_dirty(handle, old_inode_bh);
1357         } else
1358                 mlog_errno(status);
1359 
1360         /*
1361          * Now that the name has been added to new_dir, remove the old name.
1362          *
1363          * We don't keep any directory entry context around until now
1364          * because the insert might have changed the type of directory
1365          * we're dealing with.
1366          */
1367         status = ocfs2_find_entry(old_dentry->d_name.name,
1368                                   old_dentry->d_name.len, old_dir,
1369                                   &old_entry_lookup);
1370         if (status)
1371                 goto bail;
1372 
1373         status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1374         if (status < 0) {
1375                 mlog_errno(status);
1376                 goto bail;
1377         }
1378 
1379         if (new_inode) {
1380                 drop_nlink(new_inode);
1381                 new_inode->i_ctime = CURRENT_TIME;
1382         }
1383         old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1384 
1385         if (update_dot_dot) {
1386                 status = ocfs2_update_entry(old_inode, handle,
1387                                             &old_inode_dot_dot_res, new_dir);
1388                 drop_nlink(old_dir);
1389                 if (new_inode) {
1390                         drop_nlink(new_inode);
1391                 } else {
1392                         inc_nlink(new_dir);
1393                         mark_inode_dirty(new_dir);
1394                 }
1395         }
1396         mark_inode_dirty(old_dir);
1397         ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1398         if (new_inode) {
1399                 mark_inode_dirty(new_inode);
1400                 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1401         }
1402 
1403         if (old_dir != new_dir) {
1404                 /* Keep the same times on both directories.*/
1405                 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1406 
1407                 /*
1408                  * This will also pick up the i_nlink change from the
1409                  * block above.
1410                  */
1411                 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1412         }
1413 
1414         if (old_dir_nlink != old_dir->i_nlink) {
1415                 if (!old_dir_bh) {
1416                         mlog(ML_ERROR, "need to change nlink for old dir "
1417                              "%llu from %d to %d but bh is NULL!\n",
1418                              (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1419                              (int)old_dir_nlink, old_dir->i_nlink);
1420                 } else {
1421                         struct ocfs2_dinode *fe;
1422                         status = ocfs2_journal_access_di(handle,
1423                                                          INODE_CACHE(old_dir),
1424                                                          old_dir_bh,
1425                                                          OCFS2_JOURNAL_ACCESS_WRITE);
1426                         fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1427                         ocfs2_set_links_count(fe, old_dir->i_nlink);
1428                         ocfs2_journal_dirty(handle, old_dir_bh);
1429                 }
1430         }
1431         ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1432         status = 0;
1433 bail:
1434         if (rename_lock)
1435                 ocfs2_rename_unlock(osb);
1436 
1437         if (handle)
1438                 ocfs2_commit_trans(osb, handle);
1439 
1440         if (parents_locked)
1441                 ocfs2_double_unlock(old_dir, new_dir);
1442 
1443         if (old_child_locked)
1444                 ocfs2_inode_unlock(old_inode, 1);
1445 
1446         if (new_child_locked)
1447                 ocfs2_inode_unlock(new_inode, 1);
1448 
1449         if (orphan_dir) {
1450                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1451                 ocfs2_inode_unlock(orphan_dir, 1);
1452                 mutex_unlock(&orphan_dir->i_mutex);
1453                 iput(orphan_dir);
1454         }
1455 
1456         if (new_inode)
1457                 sync_mapping_buffers(old_inode->i_mapping);
1458 
1459         if (new_inode)
1460                 iput(new_inode);
1461 
1462         ocfs2_free_dir_lookup_result(&target_lookup_res);
1463         ocfs2_free_dir_lookup_result(&old_entry_lookup);
1464         ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1465         ocfs2_free_dir_lookup_result(&orphan_insert);
1466         ocfs2_free_dir_lookup_result(&target_insert);
1467 
1468         brelse(newfe_bh);
1469         brelse(old_inode_bh);
1470         brelse(old_dir_bh);
1471         brelse(new_dir_bh);
1472 
1473         if (status)
1474                 mlog_errno(status);
1475 
1476         return status;
1477 }
1478 
1479 /*
1480  * we expect i_size = strlen(symname). Copy symname into the file
1481  * data, including the null terminator.
1482  */
1483 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1484                                      handle_t *handle,
1485                                      struct inode *inode,
1486                                      const char *symname)
1487 {
1488         struct buffer_head **bhs = NULL;
1489         const char *c;
1490         struct super_block *sb = osb->sb;
1491         u64 p_blkno, p_blocks;
1492         int virtual, blocks, status, i, bytes_left;
1493 
1494         bytes_left = i_size_read(inode) + 1;
1495         /* we can't trust i_blocks because we're actually going to
1496          * write i_size + 1 bytes. */
1497         blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1498 
1499         trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1500                                         i_size_read(inode), blocks);
1501 
1502         /* Sanity check -- make sure we're going to fit. */
1503         if (bytes_left >
1504             ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1505                 status = -EIO;
1506                 mlog_errno(status);
1507                 goto bail;
1508         }
1509 
1510         bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1511         if (!bhs) {
1512                 status = -ENOMEM;
1513                 mlog_errno(status);
1514                 goto bail;
1515         }
1516 
1517         status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1518                                              NULL);
1519         if (status < 0) {
1520                 mlog_errno(status);
1521                 goto bail;
1522         }
1523 
1524         /* links can never be larger than one cluster so we know this
1525          * is all going to be contiguous, but do a sanity check
1526          * anyway. */
1527         if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1528                 status = -EIO;
1529                 mlog_errno(status);
1530                 goto bail;
1531         }
1532 
1533         virtual = 0;
1534         while(bytes_left > 0) {
1535                 c = &symname[virtual * sb->s_blocksize];
1536 
1537                 bhs[virtual] = sb_getblk(sb, p_blkno);
1538                 if (!bhs[virtual]) {
1539                         status = -ENOMEM;
1540                         mlog_errno(status);
1541                         goto bail;
1542                 }
1543                 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1544                                               bhs[virtual]);
1545 
1546                 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1547                                               bhs[virtual],
1548                                               OCFS2_JOURNAL_ACCESS_CREATE);
1549                 if (status < 0) {
1550                         mlog_errno(status);
1551                         goto bail;
1552                 }
1553 
1554                 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1555 
1556                 memcpy(bhs[virtual]->b_data, c,
1557                        (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1558                        bytes_left);
1559 
1560                 ocfs2_journal_dirty(handle, bhs[virtual]);
1561 
1562                 virtual++;
1563                 p_blkno++;
1564                 bytes_left -= sb->s_blocksize;
1565         }
1566 
1567         status = 0;
1568 bail:
1569 
1570         if (bhs) {
1571                 for(i = 0; i < blocks; i++)
1572                         brelse(bhs[i]);
1573                 kfree(bhs);
1574         }
1575 
1576         if (status)
1577                 mlog_errno(status);
1578         return status;
1579 }
1580 
1581 static int ocfs2_symlink(struct inode *dir,
1582                          struct dentry *dentry,
1583                          const char *symname)
1584 {
1585         int status, l, credits;
1586         u64 newsize;
1587         struct ocfs2_super *osb = NULL;
1588         struct inode *inode = NULL;
1589         struct super_block *sb;
1590         struct buffer_head *new_fe_bh = NULL;
1591         struct buffer_head *parent_fe_bh = NULL;
1592         struct ocfs2_dinode *fe = NULL;
1593         struct ocfs2_dinode *dirfe;
1594         handle_t *handle = NULL;
1595         struct ocfs2_alloc_context *inode_ac = NULL;
1596         struct ocfs2_alloc_context *data_ac = NULL;
1597         struct ocfs2_alloc_context *xattr_ac = NULL;
1598         int want_clusters = 0;
1599         int xattr_credits = 0;
1600         struct ocfs2_security_xattr_info si = {
1601                 .enable = 1,
1602         };
1603         int did_quota = 0, did_quota_inode = 0;
1604         struct ocfs2_dir_lookup_result lookup = { NULL, };
1605         sigset_t oldset;
1606         int did_block_signals = 0;
1607 
1608         trace_ocfs2_symlink_begin(dir, dentry, symname,
1609                                   dentry->d_name.len, dentry->d_name.name);
1610 
1611         dquot_initialize(dir);
1612 
1613         sb = dir->i_sb;
1614         osb = OCFS2_SB(sb);
1615 
1616         l = strlen(symname) + 1;
1617 
1618         credits = ocfs2_calc_symlink_credits(sb);
1619 
1620         /* lock the parent directory */
1621         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1622         if (status < 0) {
1623                 if (status != -ENOENT)
1624                         mlog_errno(status);
1625                 return status;
1626         }
1627 
1628         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1629         if (!ocfs2_read_links_count(dirfe)) {
1630                 /* can't make a file in a deleted directory. */
1631                 status = -ENOENT;
1632                 goto bail;
1633         }
1634 
1635         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1636                                            dentry->d_name.len);
1637         if (status)
1638                 goto bail;
1639 
1640         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1641                                               dentry->d_name.name,
1642                                               dentry->d_name.len, &lookup);
1643         if (status < 0) {
1644                 mlog_errno(status);
1645                 goto bail;
1646         }
1647 
1648         status = ocfs2_reserve_new_inode(osb, &inode_ac);
1649         if (status < 0) {
1650                 if (status != -ENOSPC)
1651                         mlog_errno(status);
1652                 goto bail;
1653         }
1654 
1655         inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1656         if (!inode) {
1657                 status = -ENOMEM;
1658                 mlog_errno(status);
1659                 goto bail;
1660         }
1661 
1662         /* get security xattr */
1663         status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1664         if (status) {
1665                 if (status == -EOPNOTSUPP)
1666                         si.enable = 0;
1667                 else {
1668                         mlog_errno(status);
1669                         goto bail;
1670                 }
1671         }
1672 
1673         /* calculate meta data/clusters for setting security xattr */
1674         if (si.enable) {
1675                 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1676                                                   &xattr_credits, &xattr_ac);
1677                 if (status < 0) {
1678                         mlog_errno(status);
1679                         goto bail;
1680                 }
1681         }
1682 
1683         /* don't reserve bitmap space for fast symlinks. */
1684         if (l > ocfs2_fast_symlink_chars(sb))
1685                 want_clusters += 1;
1686 
1687         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1688         if (status < 0) {
1689                 if (status != -ENOSPC)
1690                         mlog_errno(status);
1691                 goto bail;
1692         }
1693 
1694         handle = ocfs2_start_trans(osb, credits + xattr_credits);
1695         if (IS_ERR(handle)) {
1696                 status = PTR_ERR(handle);
1697                 handle = NULL;
1698                 mlog_errno(status);
1699                 goto bail;
1700         }
1701 
1702         /* Starting to change things, restart is no longer possible. */
1703         ocfs2_block_signals(&oldset);
1704         did_block_signals = 1;
1705 
1706         status = dquot_alloc_inode(inode);
1707         if (status)
1708                 goto bail;
1709         did_quota_inode = 1;
1710 
1711         trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1712                                    dentry->d_name.name,
1713                                    (unsigned long long)OCFS2_I(dir)->ip_blkno,
1714                                    inode->i_mode);
1715 
1716         status = ocfs2_mknod_locked(osb, dir, inode,
1717                                     0, &new_fe_bh, parent_fe_bh, handle,
1718                                     inode_ac);
1719         if (status < 0) {
1720                 mlog_errno(status);
1721                 goto bail;
1722         }
1723 
1724         fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1725         inode->i_rdev = 0;
1726         newsize = l - 1;
1727         inode->i_op = &ocfs2_symlink_inode_operations;
1728         if (l > ocfs2_fast_symlink_chars(sb)) {
1729                 u32 offset = 0;
1730 
1731                 status = dquot_alloc_space_nodirty(inode,
1732                     ocfs2_clusters_to_bytes(osb->sb, 1));
1733                 if (status)
1734                         goto bail;
1735                 did_quota = 1;
1736                 inode->i_mapping->a_ops = &ocfs2_aops;
1737                 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1738                                               new_fe_bh,
1739                                               handle, data_ac, NULL,
1740                                               NULL);
1741                 if (status < 0) {
1742                         if (status != -ENOSPC && status != -EINTR) {
1743                                 mlog(ML_ERROR,
1744                                      "Failed to extend file to %llu\n",
1745                                      (unsigned long long)newsize);
1746                                 mlog_errno(status);
1747                                 status = -ENOSPC;
1748                         }
1749                         goto bail;
1750                 }
1751                 i_size_write(inode, newsize);
1752                 inode->i_blocks = ocfs2_inode_sector_count(inode);
1753         } else {
1754                 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1755                 memcpy((char *) fe->id2.i_symlink, symname, l);
1756                 i_size_write(inode, newsize);
1757                 inode->i_blocks = 0;
1758         }
1759 
1760         status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1761         if (status < 0) {
1762                 mlog_errno(status);
1763                 goto bail;
1764         }
1765 
1766         if (!ocfs2_inode_is_fast_symlink(inode)) {
1767                 status = ocfs2_create_symlink_data(osb, handle, inode,
1768                                                    symname);
1769                 if (status < 0) {
1770                         mlog_errno(status);
1771                         goto bail;
1772                 }
1773         }
1774 
1775         if (si.enable) {
1776                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1777                                                  xattr_ac, data_ac);
1778                 if (status < 0) {
1779                         mlog_errno(status);
1780                         goto bail;
1781                 }
1782         }
1783 
1784         /*
1785          * Do this before adding the entry to the directory. We add
1786          * also set d_op after success so that ->d_iput() will cleanup
1787          * the dentry lock even if ocfs2_add_entry() fails below.
1788          */
1789         status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1790         if (status) {
1791                 mlog_errno(status);
1792                 goto bail;
1793         }
1794 
1795         status = ocfs2_add_entry(handle, dentry, inode,
1796                                  le64_to_cpu(fe->i_blkno), parent_fe_bh,
1797                                  &lookup);
1798         if (status < 0) {
1799                 mlog_errno(status);
1800                 goto bail;
1801         }
1802 
1803         insert_inode_hash(inode);
1804         d_instantiate(dentry, inode);
1805 bail:
1806         if (status < 0 && did_quota)
1807                 dquot_free_space_nodirty(inode,
1808                                         ocfs2_clusters_to_bytes(osb->sb, 1));
1809         if (status < 0 && did_quota_inode)
1810                 dquot_free_inode(inode);
1811         if (handle)
1812                 ocfs2_commit_trans(osb, handle);
1813 
1814         ocfs2_inode_unlock(dir, 1);
1815         if (did_block_signals)
1816                 ocfs2_unblock_signals(&oldset);
1817 
1818         brelse(new_fe_bh);
1819         brelse(parent_fe_bh);
1820         kfree(si.name);
1821         kfree(si.value);
1822         ocfs2_free_dir_lookup_result(&lookup);
1823         if (inode_ac)
1824                 ocfs2_free_alloc_context(inode_ac);
1825         if (data_ac)
1826                 ocfs2_free_alloc_context(data_ac);
1827         if (xattr_ac)
1828                 ocfs2_free_alloc_context(xattr_ac);
1829         if ((status < 0) && inode) {
1830                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
1831                 clear_nlink(inode);
1832                 iput(inode);
1833         }
1834 
1835         if (status)
1836                 mlog_errno(status);
1837 
1838         return status;
1839 }
1840 
1841 static int ocfs2_blkno_stringify(u64 blkno, char *name)
1842 {
1843         int status, namelen;
1844 
1845         namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
1846                            (long long)blkno);
1847         if (namelen <= 0) {
1848                 if (namelen)
1849                         status = namelen;
1850                 else
1851                         status = -EINVAL;
1852                 mlog_errno(status);
1853                 goto bail;
1854         }
1855         if (namelen != OCFS2_ORPHAN_NAMELEN) {
1856                 status = -EINVAL;
1857                 mlog_errno(status);
1858                 goto bail;
1859         }
1860 
1861         trace_ocfs2_blkno_stringify(blkno, name, namelen);
1862 
1863         status = 0;
1864 bail:
1865         if (status < 0)
1866                 mlog_errno(status);
1867         return status;
1868 }
1869 
1870 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
1871                                         struct inode **ret_orphan_dir,
1872                                         struct buffer_head **ret_orphan_dir_bh)
1873 {
1874         struct inode *orphan_dir_inode;
1875         struct buffer_head *orphan_dir_bh = NULL;
1876         int ret = 0;
1877 
1878         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
1879                                                        ORPHAN_DIR_SYSTEM_INODE,
1880                                                        osb->slot_num);
1881         if (!orphan_dir_inode) {
1882                 ret = -ENOENT;
1883                 mlog_errno(ret);
1884                 return ret;
1885         }
1886 
1887         mutex_lock(&orphan_dir_inode->i_mutex);
1888 
1889         ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
1890         if (ret < 0) {
1891                 mutex_unlock(&orphan_dir_inode->i_mutex);
1892                 iput(orphan_dir_inode);
1893 
1894                 mlog_errno(ret);
1895                 return ret;
1896         }
1897 
1898         *ret_orphan_dir = orphan_dir_inode;
1899         *ret_orphan_dir_bh = orphan_dir_bh;
1900 
1901         return 0;
1902 }
1903 
1904 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
1905                                       struct buffer_head *orphan_dir_bh,
1906                                       u64 blkno,
1907                                       char *name,
1908                                       struct ocfs2_dir_lookup_result *lookup)
1909 {
1910         int ret;
1911         struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
1912 
1913         ret = ocfs2_blkno_stringify(blkno, name);
1914         if (ret < 0) {
1915                 mlog_errno(ret);
1916                 return ret;
1917         }
1918 
1919         ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
1920                                            orphan_dir_bh, name,
1921                                            OCFS2_ORPHAN_NAMELEN, lookup);
1922         if (ret < 0) {
1923                 mlog_errno(ret);
1924                 return ret;
1925         }
1926 
1927         return 0;
1928 }
1929 
1930 /**
1931  * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
1932  * insertion of an orphan.
1933  * @osb: ocfs2 file system
1934  * @ret_orphan_dir: Orphan dir inode - returned locked!
1935  * @blkno: Actual block number of the inode to be inserted into orphan dir.
1936  * @lookup: dir lookup result, to be passed back into functions like
1937  *          ocfs2_orphan_add
1938  *
1939  * Returns zero on success and the ret_orphan_dir, name and lookup
1940  * fields will be populated.
1941  *
1942  * Returns non-zero on failure. 
1943  */
1944 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
1945                                     struct inode **ret_orphan_dir,
1946                                     u64 blkno,
1947                                     char *name,
1948                                     struct ocfs2_dir_lookup_result *lookup)
1949 {
1950         struct inode *orphan_dir_inode = NULL;
1951         struct buffer_head *orphan_dir_bh = NULL;
1952         int ret = 0;
1953 
1954         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
1955                                            &orphan_dir_bh);
1956         if (ret < 0) {
1957                 mlog_errno(ret);
1958                 return ret;
1959         }
1960 
1961         ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
1962                                          blkno, name, lookup);
1963         if (ret < 0) {
1964                 mlog_errno(ret);
1965                 goto out;
1966         }
1967 
1968         *ret_orphan_dir = orphan_dir_inode;
1969 
1970 out:
1971         brelse(orphan_dir_bh);
1972 
1973         if (ret) {
1974                 ocfs2_inode_unlock(orphan_dir_inode, 1);
1975                 mutex_unlock(&orphan_dir_inode->i_mutex);
1976                 iput(orphan_dir_inode);
1977         }
1978 
1979         if (ret)
1980                 mlog_errno(ret);
1981         return ret;
1982 }
1983 
1984 static int ocfs2_orphan_add(struct ocfs2_super *osb,
1985                             handle_t *handle,
1986                             struct inode *inode,
1987                             struct buffer_head *fe_bh,
1988                             char *name,
1989                             struct ocfs2_dir_lookup_result *lookup,
1990                             struct inode *orphan_dir_inode)
1991 {
1992         struct buffer_head *orphan_dir_bh = NULL;
1993         int status = 0;
1994         struct ocfs2_dinode *orphan_fe;
1995         struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
1996 
1997         trace_ocfs2_orphan_add_begin(
1998                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
1999 
2000         status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2001         if (status < 0) {
2002                 mlog_errno(status);
2003                 goto leave;
2004         }
2005 
2006         status = ocfs2_journal_access_di(handle,
2007                                          INODE_CACHE(orphan_dir_inode),
2008                                          orphan_dir_bh,
2009                                          OCFS2_JOURNAL_ACCESS_WRITE);
2010         if (status < 0) {
2011                 mlog_errno(status);
2012                 goto leave;
2013         }
2014 
2015         /* we're a cluster, and nlink can change on disk from
2016          * underneath us... */
2017         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2018         if (S_ISDIR(inode->i_mode))
2019                 ocfs2_add_links_count(orphan_fe, 1);
2020         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2021         ocfs2_journal_dirty(handle, orphan_dir_bh);
2022 
2023         status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2024                                    OCFS2_ORPHAN_NAMELEN, inode,
2025                                    OCFS2_I(inode)->ip_blkno,
2026                                    orphan_dir_bh, lookup);
2027         if (status < 0) {
2028                 mlog_errno(status);
2029                 goto leave;
2030         }
2031 
2032         /*
2033          * We're going to journal the change of i_flags and i_orphaned_slot.
2034          * It's safe anyway, though some callers may duplicate the journaling.
2035          * Journaling within the func just make the logic look more
2036          * straightforward.
2037          */
2038         status = ocfs2_journal_access_di(handle,
2039                                          INODE_CACHE(inode),
2040                                          fe_bh,
2041                                          OCFS2_JOURNAL_ACCESS_WRITE);
2042         if (status < 0) {
2043                 mlog_errno(status);
2044                 goto leave;
2045         }
2046 
2047         le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL);
2048         OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2049 
2050         /* Record which orphan dir our inode now resides
2051          * in. delete_inode will use this to determine which orphan
2052          * dir to lock. */
2053         fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2054 
2055         ocfs2_journal_dirty(handle, fe_bh);
2056 
2057         trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2058                                    osb->slot_num);
2059 
2060 leave:
2061         brelse(orphan_dir_bh);
2062 
2063         if (status)
2064                 mlog_errno(status);
2065         return status;
2066 }
2067 
2068 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2069 int ocfs2_orphan_del(struct ocfs2_super *osb,
2070                      handle_t *handle,
2071                      struct inode *orphan_dir_inode,
2072                      struct inode *inode,
2073                      struct buffer_head *orphan_dir_bh)
2074 {
2075         char name[OCFS2_ORPHAN_NAMELEN + 1];
2076         struct ocfs2_dinode *orphan_fe;
2077         int status = 0;
2078         struct ocfs2_dir_lookup_result lookup = { NULL, };
2079 
2080         status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2081         if (status < 0) {
2082                 mlog_errno(status);
2083                 goto leave;
2084         }
2085 
2086         trace_ocfs2_orphan_del(
2087              (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2088              name, OCFS2_ORPHAN_NAMELEN);
2089 
2090         /* find it's spot in the orphan directory */
2091         status = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, orphan_dir_inode,
2092                                   &lookup);
2093         if (status) {
2094                 mlog_errno(status);
2095                 goto leave;
2096         }
2097 
2098         /* remove it from the orphan directory */
2099         status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2100         if (status < 0) {
2101                 mlog_errno(status);
2102                 goto leave;
2103         }
2104 
2105         status = ocfs2_journal_access_di(handle,
2106                                          INODE_CACHE(orphan_dir_inode),
2107                                          orphan_dir_bh,
2108                                          OCFS2_JOURNAL_ACCESS_WRITE);
2109         if (status < 0) {
2110                 mlog_errno(status);
2111                 goto leave;
2112         }
2113 
2114         /* do the i_nlink dance! :) */
2115         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2116         if (S_ISDIR(inode->i_mode))
2117                 ocfs2_add_links_count(orphan_fe, -1);
2118         set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2119         ocfs2_journal_dirty(handle, orphan_dir_bh);
2120 
2121 leave:
2122         ocfs2_free_dir_lookup_result(&lookup);
2123 
2124         if (status)
2125                 mlog_errno(status);
2126         return status;
2127 }
2128 
2129 /**
2130  * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2131  * allocated file. This is different from the typical 'add to orphan dir'
2132  * operation in that the inode does not yet exist. This is a problem because
2133  * the orphan dir stringifies the inode block number to come up with it's
2134  * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2135  * problem. This function works around it by calling deeper into the orphan
2136  * and suballoc code than other callers. Use this only by necessity.
2137  * @dir: The directory which this inode will ultimately wind up under - not the
2138  * orphan dir!
2139  * @dir_bh: buffer_head the @dir inode block
2140  * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2141  * with the string to be used for orphan dirent. Pass back to the orphan dir
2142  * code.
2143  * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2144  * dir code.
2145  * @ret_di_blkno: block number where the new inode will be allocated.
2146  * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2147  * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2148  *
2149  * Returns zero on success and the ret_orphan_dir, name and lookup
2150  * fields will be populated.
2151  *
2152  * Returns non-zero on failure. 
2153  */
2154 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2155                                         struct buffer_head *dir_bh,
2156                                         char *orphan_name,
2157                                         struct inode **ret_orphan_dir,
2158                                         u64 *ret_di_blkno,
2159                                         struct ocfs2_dir_lookup_result *orphan_insert,
2160                                         struct ocfs2_alloc_context **ret_inode_ac)
2161 {
2162         int ret;
2163         u64 di_blkno;
2164         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2165         struct inode *orphan_dir = NULL;
2166         struct buffer_head *orphan_dir_bh = NULL;
2167         struct ocfs2_alloc_context *inode_ac = NULL;
2168 
2169         ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2170         if (ret < 0) {
2171                 mlog_errno(ret);
2172                 return ret;
2173         }
2174 
2175         /* reserve an inode spot */
2176         ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2177         if (ret < 0) {
2178                 if (ret != -ENOSPC)
2179                         mlog_errno(ret);
2180                 goto out;
2181         }
2182 
2183         ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2184                                        &di_blkno);
2185         if (ret) {
2186                 mlog_errno(ret);
2187                 goto out;
2188         }
2189 
2190         ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2191                                          di_blkno, orphan_name, orphan_insert);
2192         if (ret < 0) {
2193                 mlog_errno(ret);
2194                 goto out;
2195         }
2196 
2197 out:
2198         if (ret == 0) {
2199                 *ret_orphan_dir = orphan_dir;
2200                 *ret_di_blkno = di_blkno;
2201                 *ret_inode_ac = inode_ac;
2202                 /*
2203                  * orphan_name and orphan_insert are already up to
2204                  * date via prepare_orphan_dir
2205                  */
2206         } else {
2207                 /* Unroll reserve_new_inode* */
2208                 if (inode_ac)
2209                         ocfs2_free_alloc_context(inode_ac);
2210 
2211                 /* Unroll orphan dir locking */
2212                 mutex_unlock(&orphan_dir->i_mutex);
2213                 ocfs2_inode_unlock(orphan_dir, 1);
2214                 iput(orphan_dir);
2215         }
2216 
2217         brelse(orphan_dir_bh);
2218 
2219         return ret;
2220 }
2221 
2222 int ocfs2_create_inode_in_orphan(struct inode *dir,
2223                                  int mode,
2224                                  struct inode **new_inode)
2225 {
2226         int status, did_quota_inode = 0;
2227         struct inode *inode = NULL;
2228         struct inode *orphan_dir = NULL;
2229         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2230         struct ocfs2_dinode *di = NULL;
2231         handle_t *handle = NULL;
2232         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2233         struct buffer_head *parent_di_bh = NULL;
2234         struct buffer_head *new_di_bh = NULL;
2235         struct ocfs2_alloc_context *inode_ac = NULL;
2236         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2237         u64 uninitialized_var(di_blkno), suballoc_loc;
2238         u16 suballoc_bit;
2239 
2240         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2241         if (status < 0) {
2242                 if (status != -ENOENT)
2243                         mlog_errno(status);
2244                 return status;
2245         }
2246 
2247         status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2248                                               orphan_name, &orphan_dir,
2249                                               &di_blkno, &orphan_insert, &inode_ac);
2250         if (status < 0) {
2251                 if (status != -ENOSPC)
2252                         mlog_errno(status);
2253                 goto leave;
2254         }
2255 
2256         inode = ocfs2_get_init_inode(dir, mode);
2257         if (!inode) {
2258                 status = -ENOMEM;
2259                 mlog_errno(status);
2260                 goto leave;
2261         }
2262 
2263         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2264         if (IS_ERR(handle)) {
2265                 status = PTR_ERR(handle);
2266                 handle = NULL;
2267                 mlog_errno(status);
2268                 goto leave;
2269         }
2270 
2271         status = dquot_alloc_inode(inode);
2272         if (status)
2273                 goto leave;
2274         did_quota_inode = 1;
2275 
2276         status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2277                                               &suballoc_loc,
2278                                               &suballoc_bit, di_blkno);
2279         if (status < 0) {
2280                 mlog_errno(status);
2281                 goto leave;
2282         }
2283 
2284         clear_nlink(inode);
2285         /* do the real work now. */
2286         status = __ocfs2_mknod_locked(dir, inode,
2287                                       0, &new_di_bh, parent_di_bh, handle,
2288                                       inode_ac, di_blkno, suballoc_loc,
2289                                       suballoc_bit);
2290         if (status < 0) {
2291                 mlog_errno(status);
2292                 goto leave;
2293         }
2294 
2295         di = (struct ocfs2_dinode *)new_di_bh->b_data;
2296         status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2297                                   &orphan_insert, orphan_dir);
2298         if (status < 0) {
2299                 mlog_errno(status);
2300                 goto leave;
2301         }
2302 
2303         /* get open lock so that only nodes can't remove it from orphan dir. */
2304         status = ocfs2_open_lock(inode);
2305         if (status < 0)
2306                 mlog_errno(status);
2307 
2308         insert_inode_hash(inode);
2309 leave:
2310         if (status < 0 && did_quota_inode)
2311                 dquot_free_inode(inode);
2312         if (handle)
2313                 ocfs2_commit_trans(osb, handle);
2314 
2315         if (orphan_dir) {
2316                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2317                 ocfs2_inode_unlock(orphan_dir, 1);
2318                 mutex_unlock(&orphan_dir->i_mutex);
2319                 iput(orphan_dir);
2320         }
2321 
2322         if ((status < 0) && inode) {
2323                 clear_nlink(inode);
2324                 iput(inode);
2325         }
2326 
2327         if (inode_ac)
2328                 ocfs2_free_alloc_context(inode_ac);
2329 
2330         brelse(new_di_bh);
2331 
2332         if (!status)
2333                 *new_inode = inode;
2334 
2335         ocfs2_free_dir_lookup_result(&orphan_insert);
2336 
2337         ocfs2_inode_unlock(dir, 1);
2338         brelse(parent_di_bh);
2339         return status;
2340 }
2341 
2342 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2343                                    struct inode *inode,
2344                                    struct dentry *dentry)
2345 {
2346         int status = 0;
2347         struct buffer_head *parent_di_bh = NULL;
2348         handle_t *handle = NULL;
2349         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2350         struct ocfs2_dinode *dir_di, *di;
2351         struct inode *orphan_dir_inode = NULL;
2352         struct buffer_head *orphan_dir_bh = NULL;
2353         struct buffer_head *di_bh = NULL;
2354         struct ocfs2_dir_lookup_result lookup = { NULL, };
2355 
2356         trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2357                                 dentry->d_name.len, dentry->d_name.name,
2358                                 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2359                                 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2360 
2361         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2362         if (status < 0) {
2363                 if (status != -ENOENT)
2364                         mlog_errno(status);
2365                 return status;
2366         }
2367 
2368         dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2369         if (!dir_di->i_links_count) {
2370                 /* can't make a file in a deleted directory. */
2371                 status = -ENOENT;
2372                 goto leave;
2373         }
2374 
2375         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2376                                            dentry->d_name.len);
2377         if (status)
2378                 goto leave;
2379 
2380         /* get a spot inside the dir. */
2381         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2382                                               dentry->d_name.name,
2383                                               dentry->d_name.len, &lookup);
2384         if (status < 0) {
2385                 mlog_errno(status);
2386                 goto leave;
2387         }
2388 
2389         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2390                                                        ORPHAN_DIR_SYSTEM_INODE,
2391                                                        osb->slot_num);
2392         if (!orphan_dir_inode) {
2393                 status = -EEXIST;
2394                 mlog_errno(status);
2395                 goto leave;
2396         }
2397 
2398         mutex_lock(&orphan_dir_inode->i_mutex);
2399 
2400         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2401         if (status < 0) {
2402                 mlog_errno(status);
2403                 mutex_unlock(&orphan_dir_inode->i_mutex);
2404                 iput(orphan_dir_inode);
2405                 goto leave;
2406         }
2407 
2408         status = ocfs2_read_inode_block(inode, &di_bh);
2409         if (status < 0) {
2410                 mlog_errno(status);
2411                 goto orphan_unlock;
2412         }
2413 
2414         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2415         if (IS_ERR(handle)) {
2416                 status = PTR_ERR(handle);
2417                 handle = NULL;
2418                 mlog_errno(status);
2419                 goto orphan_unlock;
2420         }
2421 
2422         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2423                                          di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2424         if (status < 0) {
2425                 mlog_errno(status);
2426                 goto out_commit;
2427         }
2428 
2429         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2430                                   orphan_dir_bh);
2431         if (status < 0) {
2432                 mlog_errno(status);
2433                 goto out_commit;
2434         }
2435 
2436         di = (struct ocfs2_dinode *)di_bh->b_data;
2437         le32_add_cpu(&di->i_flags, -OCFS2_ORPHANED_FL);
2438         di->i_orphaned_slot = 0;
2439         set_nlink(inode, 1);
2440         ocfs2_set_links_count(di, inode->i_nlink);
2441         ocfs2_journal_dirty(handle, di_bh);
2442 
2443         status = ocfs2_add_entry(handle, dentry, inode,
2444                                  OCFS2_I(inode)->ip_blkno, parent_di_bh,
2445                                  &lookup);
2446         if (status < 0) {
2447                 mlog_errno(status);
2448                 goto out_commit;
2449         }
2450 
2451         status = ocfs2_dentry_attach_lock(dentry, inode,
2452                                           OCFS2_I(dir)->ip_blkno);
2453         if (status) {
2454                 mlog_errno(status);
2455                 goto out_commit;
2456         }
2457 
2458         d_instantiate(dentry, inode);
2459         status = 0;
2460 out_commit:
2461         ocfs2_commit_trans(osb, handle);
2462 orphan_unlock:
2463         ocfs2_inode_unlock(orphan_dir_inode, 1);
2464         mutex_unlock(&orphan_dir_inode->i_mutex);
2465         iput(orphan_dir_inode);
2466 leave:
2467 
2468         ocfs2_inode_unlock(dir, 1);
2469 
2470         brelse(di_bh);
2471         brelse(parent_di_bh);
2472         brelse(orphan_dir_bh);
2473 
2474         ocfs2_free_dir_lookup_result(&lookup);
2475 
2476         if (status)
2477                 mlog_errno(status);
2478 
2479         return status;
2480 }
2481 
2482 const struct inode_operations ocfs2_dir_iops = {
2483         .create         = ocfs2_create,
2484         .lookup         = ocfs2_lookup,
2485         .link           = ocfs2_link,
2486         .unlink         = ocfs2_unlink,
2487         .rmdir          = ocfs2_unlink,
2488         .symlink        = ocfs2_symlink,
2489         .mkdir          = ocfs2_mkdir,
2490         .mknod          = ocfs2_mknod,
2491         .rename         = ocfs2_rename,
2492         .setattr        = ocfs2_setattr,
2493         .getattr        = ocfs2_getattr,
2494         .permission     = ocfs2_permission,
2495         .setxattr       = generic_setxattr,
2496         .getxattr       = generic_getxattr,
2497         .listxattr      = ocfs2_listxattr,
2498         .removexattr    = generic_removexattr,
2499         .fiemap         = ocfs2_fiemap,
2500         .get_acl        = ocfs2_iop_get_acl,
2501 };
2502 

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