drm/radeon: add new RS880 pci id
[linux-2.6.git] / fs / ocfs2 / namei.c
1 /* -*- mode: c; c-basic-offset: 8; -*-
2  * vim: noexpandtab sw=8 ts=8 sts=0:
3  *
4  * namei.c
5  *
6  * Create and rename file, directory, symlinks
7  *
8  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
9  *
10  *  Portions of this code from linux/fs/ext3/dir.c
11  *
12  *  Copyright (C) 1992, 1993, 1994, 1995
13  *  Remy Card (card@masi.ibp.fr)
14  *  Laboratoire MASI - Institut Blaise pascal
15  *  Universite Pierre et Marie Curie (Paris VI)
16  *
17  *   from
18  *
19  *   linux/fs/minix/dir.c
20  *
21  *   Copyright (C) 1991, 1992 Linux Torvalds
22  *
23  * This program is free software; you can redistribute it and/or
24  * modify it under the terms of the GNU General Public
25  * License as published by the Free Software Foundation; either
26  * version 2 of the License, or (at your option) any later version.
27  *
28  * This program is distributed in the hope that it will be useful,
29  * but WITHOUT ANY WARRANTY; without even the implied warranty of
30  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
31  * General Public License for more details.
32  *
33  * You should have received a copy of the GNU General Public
34  * License along with this program; if not, write to the
35  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
36  * Boston, MA 021110-1307, USA.
37  */
38
39 #include <linux/fs.h>
40 #include <linux/types.h>
41 #include <linux/slab.h>
42 #include <linux/highmem.h>
43 #include <linux/quotaops.h>
44
45 #define MLOG_MASK_PREFIX ML_NAMEI
46 #include <cluster/masklog.h>
47
48 #include "ocfs2.h"
49
50 #include "alloc.h"
51 #include "dcache.h"
52 #include "dir.h"
53 #include "dlmglue.h"
54 #include "extent_map.h"
55 #include "file.h"
56 #include "inode.h"
57 #include "journal.h"
58 #include "namei.h"
59 #include "suballoc.h"
60 #include "super.h"
61 #include "symlink.h"
62 #include "sysfile.h"
63 #include "uptodate.h"
64 #include "xattr.h"
65 #include "acl.h"
66
67 #include "buffer_head_io.h"
68
69 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
70                               struct inode *dir,
71                               struct inode *inode,
72                               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 ocfs2_dinode *fe,
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                                    struct nameidata *nd)
102 {
103         int status;
104         u64 blkno;
105         struct inode *inode = NULL;
106         struct dentry *ret;
107         struct ocfs2_inode_info *oi;
108
109         mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
110                    dentry->d_name.len, dentry->d_name.name);
111
112         if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
113                 ret = ERR_PTR(-ENAMETOOLONG);
114                 goto bail;
115         }
116
117         mlog(0, "find name %.*s in directory %llu\n", dentry->d_name.len,
118              dentry->d_name.name, (unsigned long long)OCFS2_I(dir)->ip_blkno);
119
120         status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
121         if (status < 0) {
122                 if (status != -ENOENT)
123                         mlog_errno(status);
124                 ret = ERR_PTR(status);
125                 goto bail;
126         }
127
128         status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
129                                             dentry->d_name.len, &blkno);
130         if (status < 0)
131                 goto bail_add;
132
133         inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
134         if (IS_ERR(inode)) {
135                 ret = ERR_PTR(-EACCES);
136                 goto bail_unlock;
137         }
138
139         oi = OCFS2_I(inode);
140         /* Clear any orphaned state... If we were able to look up the
141          * inode from a directory, it certainly can't be orphaned. We
142          * might have the bad state from a node which intended to
143          * orphan this inode but crashed before it could commit the
144          * unlink. */
145         spin_lock(&oi->ip_lock);
146         oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
147         spin_unlock(&oi->ip_lock);
148
149 bail_add:
150         dentry->d_op = &ocfs2_dentry_ops;
151         ret = d_splice_alias(inode, dentry);
152
153         if (inode) {
154                 /*
155                  * If d_splice_alias() finds a DCACHE_DISCONNECTED
156                  * dentry, it will d_move() it on top of ourse. The
157                  * return value will indicate this however, so in
158                  * those cases, we switch them around for the locking
159                  * code.
160                  *
161                  * NOTE: This dentry already has ->d_op set from
162                  * ocfs2_get_parent() and ocfs2_get_dentry()
163                  */
164                 if (ret)
165                         dentry = ret;
166
167                 status = ocfs2_dentry_attach_lock(dentry, inode,
168                                                   OCFS2_I(dir)->ip_blkno);
169                 if (status) {
170                         mlog_errno(status);
171                         ret = ERR_PTR(status);
172                         goto bail_unlock;
173                 }
174         }
175
176 bail_unlock:
177         /* Don't drop the cluster lock until *after* the d_add --
178          * unlink on another node will message us to remove that
179          * dentry under this lock so otherwise we can race this with
180          * the downconvert thread and have a stale dentry. */
181         ocfs2_inode_unlock(dir, 0);
182
183 bail:
184
185         mlog_exit_ptr(ret);
186
187         return ret;
188 }
189
190 static struct inode *ocfs2_get_init_inode(struct inode *dir, int mode)
191 {
192         struct inode *inode;
193
194         inode = new_inode(dir->i_sb);
195         if (!inode) {
196                 mlog(ML_ERROR, "new_inode failed!\n");
197                 return NULL;
198         }
199
200         /* populate as many fields early on as possible - many of
201          * these are used by the support functions here and in
202          * callers. */
203         if (S_ISDIR(mode))
204                 inode->i_nlink = 2;
205         else
206                 inode->i_nlink = 1;
207         inode->i_uid = current_fsuid();
208         if (dir->i_mode & S_ISGID) {
209                 inode->i_gid = dir->i_gid;
210                 if (S_ISDIR(mode))
211                         mode |= S_ISGID;
212         } else
213                 inode->i_gid = current_fsgid();
214         inode->i_mode = mode;
215         vfs_dq_init(inode);
216         return inode;
217 }
218
219 static int ocfs2_mknod(struct inode *dir,
220                        struct dentry *dentry,
221                        int mode,
222                        dev_t dev)
223 {
224         int status = 0;
225         struct buffer_head *parent_fe_bh = NULL;
226         handle_t *handle = NULL;
227         struct ocfs2_super *osb;
228         struct ocfs2_dinode *dirfe;
229         struct buffer_head *new_fe_bh = NULL;
230         struct inode *inode = NULL;
231         struct ocfs2_alloc_context *inode_ac = NULL;
232         struct ocfs2_alloc_context *data_ac = NULL;
233         struct ocfs2_alloc_context *meta_ac = NULL;
234         int want_clusters = 0;
235         int want_meta = 0;
236         int xattr_credits = 0;
237         struct ocfs2_security_xattr_info si = {
238                 .enable = 1,
239         };
240         int did_quota_inode = 0;
241         struct ocfs2_dir_lookup_result lookup = { NULL, };
242
243         mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode,
244                    (unsigned long)dev, dentry->d_name.len,
245                    dentry->d_name.name);
246
247         /* get our super block */
248         osb = OCFS2_SB(dir->i_sb);
249
250         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
251         if (status < 0) {
252                 if (status != -ENOENT)
253                         mlog_errno(status);
254                 return status;
255         }
256
257         if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
258                 status = -EMLINK;
259                 goto leave;
260         }
261
262         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
263         if (!ocfs2_read_links_count(dirfe)) {
264                 /* can't make a file in a deleted directory. */
265                 status = -ENOENT;
266                 goto leave;
267         }
268
269         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
270                                            dentry->d_name.len);
271         if (status)
272                 goto leave;
273
274         /* get a spot inside the dir. */
275         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
276                                               dentry->d_name.name,
277                                               dentry->d_name.len, &lookup);
278         if (status < 0) {
279                 mlog_errno(status);
280                 goto leave;
281         }
282
283         /* reserve an inode spot */
284         status = ocfs2_reserve_new_inode(osb, &inode_ac);
285         if (status < 0) {
286                 if (status != -ENOSPC)
287                         mlog_errno(status);
288                 goto leave;
289         }
290
291         inode = ocfs2_get_init_inode(dir, mode);
292         if (!inode) {
293                 status = -ENOMEM;
294                 mlog_errno(status);
295                 goto leave;
296         }
297
298         /* get security xattr */
299         status = ocfs2_init_security_get(inode, dir, &si);
300         if (status) {
301                 if (status == -EOPNOTSUPP)
302                         si.enable = 0;
303                 else {
304                         mlog_errno(status);
305                         goto leave;
306                 }
307         }
308
309         /* calculate meta data/clusters for setting security and acl xattr */
310         status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
311                                        &si, &want_clusters,
312                                        &xattr_credits, &want_meta);
313         if (status < 0) {
314                 mlog_errno(status);
315                 goto leave;
316         }
317
318         /* Reserve a cluster if creating an extent based directory. */
319         if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
320                 want_clusters += 1;
321
322                 /* Dir indexing requires extra space as well */
323                 if (ocfs2_supports_indexed_dirs(osb))
324                         want_meta++;
325         }
326
327         status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
328         if (status < 0) {
329                 if (status != -ENOSPC)
330                         mlog_errno(status);
331                 goto leave;
332         }
333
334         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
335         if (status < 0) {
336                 if (status != -ENOSPC)
337                         mlog_errno(status);
338                 goto leave;
339         }
340
341         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
342                                                             S_ISDIR(mode),
343                                                             xattr_credits));
344         if (IS_ERR(handle)) {
345                 status = PTR_ERR(handle);
346                 handle = NULL;
347                 mlog_errno(status);
348                 goto leave;
349         }
350
351         /* We don't use standard VFS wrapper because we don't want vfs_dq_init
352          * to be called. */
353         if (sb_any_quota_active(osb->sb) &&
354             osb->sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA) {
355                 status = -EDQUOT;
356                 goto leave;
357         }
358         did_quota_inode = 1;
359
360         mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry,
361                    inode->i_mode, (unsigned long)dev, dentry->d_name.len,
362                    dentry->d_name.name);
363
364         /* do the real work now. */
365         status = ocfs2_mknod_locked(osb, dir, inode, dev,
366                                     &new_fe_bh, parent_fe_bh, handle,
367                                     inode_ac);
368         if (status < 0) {
369                 mlog_errno(status);
370                 goto leave;
371         }
372
373         if (S_ISDIR(mode)) {
374                 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
375                                             new_fe_bh, data_ac, meta_ac);
376                 if (status < 0) {
377                         mlog_errno(status);
378                         goto leave;
379                 }
380
381                 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
382                                                  parent_fe_bh,
383                                                  OCFS2_JOURNAL_ACCESS_WRITE);
384                 if (status < 0) {
385                         mlog_errno(status);
386                         goto leave;
387                 }
388                 ocfs2_add_links_count(dirfe, 1);
389                 status = ocfs2_journal_dirty(handle, parent_fe_bh);
390                 if (status < 0) {
391                         mlog_errno(status);
392                         goto leave;
393                 }
394                 inc_nlink(dir);
395         }
396
397         status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
398                                 meta_ac, data_ac);
399         if (status < 0) {
400                 mlog_errno(status);
401                 goto leave;
402         }
403
404         if (si.enable) {
405                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
406                                                  meta_ac, data_ac);
407                 if (status < 0) {
408                         mlog_errno(status);
409                         goto leave;
410                 }
411         }
412
413         status = ocfs2_add_entry(handle, dentry, inode,
414                                  OCFS2_I(inode)->ip_blkno, parent_fe_bh,
415                                  &lookup);
416         if (status < 0) {
417                 mlog_errno(status);
418                 goto leave;
419         }
420
421         status = ocfs2_dentry_attach_lock(dentry, inode,
422                                           OCFS2_I(dir)->ip_blkno);
423         if (status) {
424                 mlog_errno(status);
425                 goto leave;
426         }
427
428         insert_inode_hash(inode);
429         dentry->d_op = &ocfs2_dentry_ops;
430         d_instantiate(dentry, inode);
431         status = 0;
432 leave:
433         if (status < 0 && did_quota_inode)
434                 vfs_dq_free_inode(inode);
435         if (handle)
436                 ocfs2_commit_trans(osb, handle);
437
438         ocfs2_inode_unlock(dir, 1);
439
440         if (status == -ENOSPC)
441                 mlog(0, "Disk is full\n");
442
443         brelse(new_fe_bh);
444         brelse(parent_fe_bh);
445         kfree(si.name);
446         kfree(si.value);
447
448         ocfs2_free_dir_lookup_result(&lookup);
449
450         if ((status < 0) && inode) {
451                 clear_nlink(inode);
452                 iput(inode);
453         }
454
455         if (inode_ac)
456                 ocfs2_free_alloc_context(inode_ac);
457
458         if (data_ac)
459                 ocfs2_free_alloc_context(data_ac);
460
461         if (meta_ac)
462                 ocfs2_free_alloc_context(meta_ac);
463
464         mlog_exit(status);
465
466         return status;
467 }
468
469 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
470                               struct inode *dir,
471                               struct inode *inode,
472                               dev_t dev,
473                               struct buffer_head **new_fe_bh,
474                               struct buffer_head *parent_fe_bh,
475                               handle_t *handle,
476                               struct ocfs2_alloc_context *inode_ac)
477 {
478         int status = 0;
479         struct ocfs2_dinode *fe = NULL;
480         struct ocfs2_extent_list *fel;
481         u64 fe_blkno = 0;
482         u16 suballoc_bit;
483         u16 feat;
484
485         *new_fe_bh = NULL;
486
487         status = ocfs2_claim_new_inode(osb, handle, dir, parent_fe_bh,
488                                        inode_ac, &suballoc_bit, &fe_blkno);
489         if (status < 0) {
490                 mlog_errno(status);
491                 goto leave;
492         }
493
494         /* populate as many fields early on as possible - many of
495          * these are used by the support functions here and in
496          * callers. */
497         inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
498         OCFS2_I(inode)->ip_blkno = fe_blkno;
499         spin_lock(&osb->osb_lock);
500         inode->i_generation = osb->s_next_generation++;
501         spin_unlock(&osb->osb_lock);
502
503         *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
504         if (!*new_fe_bh) {
505                 status = -EIO;
506                 mlog_errno(status);
507                 goto leave;
508         }
509         ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
510
511         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
512                                          *new_fe_bh,
513                                          OCFS2_JOURNAL_ACCESS_CREATE);
514         if (status < 0) {
515                 mlog_errno(status);
516                 goto leave;
517         }
518
519         fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
520         memset(fe, 0, osb->sb->s_blocksize);
521
522         fe->i_generation = cpu_to_le32(inode->i_generation);
523         fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
524         fe->i_blkno = cpu_to_le64(fe_blkno);
525         fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
526         fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
527         fe->i_uid = cpu_to_le32(inode->i_uid);
528         fe->i_gid = cpu_to_le32(inode->i_gid);
529         fe->i_mode = cpu_to_le16(inode->i_mode);
530         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
531                 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
532
533         ocfs2_set_links_count(fe, inode->i_nlink);
534
535         fe->i_last_eb_blk = 0;
536         strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
537         le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL);
538         fe->i_atime = fe->i_ctime = fe->i_mtime =
539                 cpu_to_le64(CURRENT_TIME.tv_sec);
540         fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
541                 cpu_to_le32(CURRENT_TIME.tv_nsec);
542         fe->i_dtime = 0;
543
544         /*
545          * If supported, directories start with inline data. If inline
546          * isn't supported, but indexing is, we start them as indexed.
547          */
548         feat = le16_to_cpu(fe->i_dyn_features);
549         if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
550                 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
551
552                 fe->id2.i_data.id_count = cpu_to_le16(
553                                 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
554         } else {
555                 fel = &fe->id2.i_list;
556                 fel->l_tree_depth = 0;
557                 fel->l_next_free_rec = 0;
558                 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
559         }
560
561         status = ocfs2_journal_dirty(handle, *new_fe_bh);
562         if (status < 0) {
563                 mlog_errno(status);
564                 goto leave;
565         }
566
567         ocfs2_populate_inode(inode, fe, 1);
568         ocfs2_ci_set_new(osb, INODE_CACHE(inode));
569         if (!ocfs2_mount_local(osb)) {
570                 status = ocfs2_create_new_inode_locks(inode);
571                 if (status < 0)
572                         mlog_errno(status);
573         }
574
575         status = 0; /* error in ocfs2_create_new_inode_locks is not
576                      * critical */
577
578 leave:
579         if (status < 0) {
580                 if (*new_fe_bh) {
581                         brelse(*new_fe_bh);
582                         *new_fe_bh = NULL;
583                 }
584         }
585
586         mlog_exit(status);
587         return status;
588 }
589
590 static int ocfs2_mkdir(struct inode *dir,
591                        struct dentry *dentry,
592                        int mode)
593 {
594         int ret;
595
596         mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
597                    dentry->d_name.len, dentry->d_name.name);
598         ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
599         mlog_exit(ret);
600
601         return ret;
602 }
603
604 static int ocfs2_create(struct inode *dir,
605                         struct dentry *dentry,
606                         int mode,
607                         struct nameidata *nd)
608 {
609         int ret;
610
611         mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
612                    dentry->d_name.len, dentry->d_name.name);
613         ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
614         mlog_exit(ret);
615
616         return ret;
617 }
618
619 static int ocfs2_link(struct dentry *old_dentry,
620                       struct inode *dir,
621                       struct dentry *dentry)
622 {
623         handle_t *handle;
624         struct inode *inode = old_dentry->d_inode;
625         int err;
626         struct buffer_head *fe_bh = NULL;
627         struct buffer_head *parent_fe_bh = NULL;
628         struct ocfs2_dinode *fe = NULL;
629         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
630         struct ocfs2_dir_lookup_result lookup = { NULL, };
631
632         mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino,
633                    old_dentry->d_name.len, old_dentry->d_name.name,
634                    dentry->d_name.len, dentry->d_name.name);
635
636         if (S_ISDIR(inode->i_mode))
637                 return -EPERM;
638
639         err = ocfs2_inode_lock_nested(dir, &parent_fe_bh, 1, OI_LS_PARENT);
640         if (err < 0) {
641                 if (err != -ENOENT)
642                         mlog_errno(err);
643                 return err;
644         }
645
646         if (!dir->i_nlink) {
647                 err = -ENOENT;
648                 goto out;
649         }
650
651         err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
652                                         dentry->d_name.len);
653         if (err)
654                 goto out;
655
656         err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
657                                            dentry->d_name.name,
658                                            dentry->d_name.len, &lookup);
659         if (err < 0) {
660                 mlog_errno(err);
661                 goto out;
662         }
663
664         err = ocfs2_inode_lock(inode, &fe_bh, 1);
665         if (err < 0) {
666                 if (err != -ENOENT)
667                         mlog_errno(err);
668                 goto out;
669         }
670
671         fe = (struct ocfs2_dinode *) fe_bh->b_data;
672         if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
673                 err = -EMLINK;
674                 goto out_unlock_inode;
675         }
676
677         handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
678         if (IS_ERR(handle)) {
679                 err = PTR_ERR(handle);
680                 handle = NULL;
681                 mlog_errno(err);
682                 goto out_unlock_inode;
683         }
684
685         err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
686                                       OCFS2_JOURNAL_ACCESS_WRITE);
687         if (err < 0) {
688                 mlog_errno(err);
689                 goto out_commit;
690         }
691
692         inc_nlink(inode);
693         inode->i_ctime = CURRENT_TIME;
694         ocfs2_set_links_count(fe, inode->i_nlink);
695         fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
696         fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
697
698         err = ocfs2_journal_dirty(handle, fe_bh);
699         if (err < 0) {
700                 ocfs2_add_links_count(fe, -1);
701                 drop_nlink(inode);
702                 mlog_errno(err);
703                 goto out_commit;
704         }
705
706         err = ocfs2_add_entry(handle, dentry, inode,
707                               OCFS2_I(inode)->ip_blkno,
708                               parent_fe_bh, &lookup);
709         if (err) {
710                 ocfs2_add_links_count(fe, -1);
711                 drop_nlink(inode);
712                 mlog_errno(err);
713                 goto out_commit;
714         }
715
716         err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
717         if (err) {
718                 mlog_errno(err);
719                 goto out_commit;
720         }
721
722         atomic_inc(&inode->i_count);
723         dentry->d_op = &ocfs2_dentry_ops;
724         d_instantiate(dentry, inode);
725
726 out_commit:
727         ocfs2_commit_trans(osb, handle);
728 out_unlock_inode:
729         ocfs2_inode_unlock(inode, 1);
730
731 out:
732         ocfs2_inode_unlock(dir, 1);
733
734         brelse(fe_bh);
735         brelse(parent_fe_bh);
736
737         ocfs2_free_dir_lookup_result(&lookup);
738
739         mlog_exit(err);
740
741         return err;
742 }
743
744 /*
745  * Takes and drops an exclusive lock on the given dentry. This will
746  * force other nodes to drop it.
747  */
748 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
749 {
750         int ret;
751
752         ret = ocfs2_dentry_lock(dentry, 1);
753         if (ret)
754                 mlog_errno(ret);
755         else
756                 ocfs2_dentry_unlock(dentry, 1);
757
758         return ret;
759 }
760
761 static inline int inode_is_unlinkable(struct inode *inode)
762 {
763         if (S_ISDIR(inode->i_mode)) {
764                 if (inode->i_nlink == 2)
765                         return 1;
766                 return 0;
767         }
768
769         if (inode->i_nlink == 1)
770                 return 1;
771         return 0;
772 }
773
774 static int ocfs2_unlink(struct inode *dir,
775                         struct dentry *dentry)
776 {
777         int status;
778         int child_locked = 0;
779         struct inode *inode = dentry->d_inode;
780         struct inode *orphan_dir = NULL;
781         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
782         u64 blkno;
783         struct ocfs2_dinode *fe = NULL;
784         struct buffer_head *fe_bh = NULL;
785         struct buffer_head *parent_node_bh = NULL;
786         handle_t *handle = NULL;
787         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
788         struct ocfs2_dir_lookup_result lookup = { NULL, };
789         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
790
791         mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
792                    dentry->d_name.len, dentry->d_name.name);
793
794         BUG_ON(dentry->d_parent->d_inode != dir);
795
796         mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno);
797
798         if (inode == osb->root_inode) {
799                 mlog(0, "Cannot delete the root directory\n");
800                 return -EPERM;
801         }
802
803         status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
804                                          OI_LS_PARENT);
805         if (status < 0) {
806                 if (status != -ENOENT)
807                         mlog_errno(status);
808                 return status;
809         }
810
811         status = ocfs2_find_files_on_disk(dentry->d_name.name,
812                                           dentry->d_name.len, &blkno, dir,
813                                           &lookup);
814         if (status < 0) {
815                 if (status != -ENOENT)
816                         mlog_errno(status);
817                 goto leave;
818         }
819
820         if (OCFS2_I(inode)->ip_blkno != blkno) {
821                 status = -ENOENT;
822
823                 mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n",
824                      (unsigned long long)OCFS2_I(inode)->ip_blkno,
825                      (unsigned long long)blkno, OCFS2_I(inode)->ip_flags);
826                 goto leave;
827         }
828
829         status = ocfs2_inode_lock(inode, &fe_bh, 1);
830         if (status < 0) {
831                 if (status != -ENOENT)
832                         mlog_errno(status);
833                 goto leave;
834         }
835         child_locked = 1;
836
837         if (S_ISDIR(inode->i_mode)) {
838                 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
839                         status = -ENOTEMPTY;
840                         goto leave;
841                 }
842         }
843
844         status = ocfs2_remote_dentry_delete(dentry);
845         if (status < 0) {
846                 /* This remote delete should succeed under all normal
847                  * circumstances. */
848                 mlog_errno(status);
849                 goto leave;
850         }
851
852         if (inode_is_unlinkable(inode)) {
853                 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
854                                                   OCFS2_I(inode)->ip_blkno,
855                                                   orphan_name, &orphan_insert);
856                 if (status < 0) {
857                         mlog_errno(status);
858                         goto leave;
859                 }
860         }
861
862         handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
863         if (IS_ERR(handle)) {
864                 status = PTR_ERR(handle);
865                 handle = NULL;
866                 mlog_errno(status);
867                 goto leave;
868         }
869
870         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
871                                          OCFS2_JOURNAL_ACCESS_WRITE);
872         if (status < 0) {
873                 mlog_errno(status);
874                 goto leave;
875         }
876
877         fe = (struct ocfs2_dinode *) fe_bh->b_data;
878
879         if (inode_is_unlinkable(inode)) {
880                 status = ocfs2_orphan_add(osb, handle, inode, fe, orphan_name,
881                                           &orphan_insert, orphan_dir);
882                 if (status < 0) {
883                         mlog_errno(status);
884                         goto leave;
885                 }
886         }
887
888         /* delete the name from the parent dir */
889         status = ocfs2_delete_entry(handle, dir, &lookup);
890         if (status < 0) {
891                 mlog_errno(status);
892                 goto leave;
893         }
894
895         if (S_ISDIR(inode->i_mode))
896                 drop_nlink(inode);
897         drop_nlink(inode);
898         ocfs2_set_links_count(fe, inode->i_nlink);
899
900         status = ocfs2_journal_dirty(handle, fe_bh);
901         if (status < 0) {
902                 mlog_errno(status);
903                 goto leave;
904         }
905
906         dir->i_ctime = dir->i_mtime = CURRENT_TIME;
907         if (S_ISDIR(inode->i_mode))
908                 drop_nlink(dir);
909
910         status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
911         if (status < 0) {
912                 mlog_errno(status);
913                 if (S_ISDIR(inode->i_mode))
914                         inc_nlink(dir);
915         }
916
917 leave:
918         if (handle)
919                 ocfs2_commit_trans(osb, handle);
920
921         if (child_locked)
922                 ocfs2_inode_unlock(inode, 1);
923
924         ocfs2_inode_unlock(dir, 1);
925
926         if (orphan_dir) {
927                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
928                 ocfs2_inode_unlock(orphan_dir, 1);
929                 mutex_unlock(&orphan_dir->i_mutex);
930                 iput(orphan_dir);
931         }
932
933         brelse(fe_bh);
934         brelse(parent_node_bh);
935
936         ocfs2_free_dir_lookup_result(&orphan_insert);
937         ocfs2_free_dir_lookup_result(&lookup);
938
939         mlog_exit(status);
940
941         return status;
942 }
943
944 /*
945  * The only place this should be used is rename!
946  * if they have the same id, then the 1st one is the only one locked.
947  */
948 static int ocfs2_double_lock(struct ocfs2_super *osb,
949                              struct buffer_head **bh1,
950                              struct inode *inode1,
951                              struct buffer_head **bh2,
952                              struct inode *inode2)
953 {
954         int status;
955         struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
956         struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
957         struct buffer_head **tmpbh;
958         struct inode *tmpinode;
959
960         mlog_entry("(inode1 = %llu, inode2 = %llu)\n",
961                    (unsigned long long)oi1->ip_blkno,
962                    (unsigned long long)oi2->ip_blkno);
963
964         if (*bh1)
965                 *bh1 = NULL;
966         if (*bh2)
967                 *bh2 = NULL;
968
969         /* we always want to lock the one with the lower lockid first. */
970         if (oi1->ip_blkno != oi2->ip_blkno) {
971                 if (oi1->ip_blkno < oi2->ip_blkno) {
972                         /* switch id1 and id2 around */
973                         mlog(0, "switching them around...\n");
974                         tmpbh = bh2;
975                         bh2 = bh1;
976                         bh1 = tmpbh;
977
978                         tmpinode = inode2;
979                         inode2 = inode1;
980                         inode1 = tmpinode;
981                 }
982                 /* lock id2 */
983                 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
984                                                  OI_LS_RENAME1);
985                 if (status < 0) {
986                         if (status != -ENOENT)
987                                 mlog_errno(status);
988                         goto bail;
989                 }
990         }
991
992         /* lock id1 */
993         status = ocfs2_inode_lock_nested(inode1, bh1, 1, OI_LS_RENAME2);
994         if (status < 0) {
995                 /*
996                  * An error return must mean that no cluster locks
997                  * were held on function exit.
998                  */
999                 if (oi1->ip_blkno != oi2->ip_blkno)
1000                         ocfs2_inode_unlock(inode2, 1);
1001
1002                 if (status != -ENOENT)
1003                         mlog_errno(status);
1004         }
1005
1006 bail:
1007         mlog_exit(status);
1008         return status;
1009 }
1010
1011 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1012 {
1013         ocfs2_inode_unlock(inode1, 1);
1014
1015         if (inode1 != inode2)
1016                 ocfs2_inode_unlock(inode2, 1);
1017 }
1018
1019 static int ocfs2_rename(struct inode *old_dir,
1020                         struct dentry *old_dentry,
1021                         struct inode *new_dir,
1022                         struct dentry *new_dentry)
1023 {
1024         int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1025         int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1026         struct inode *old_inode = old_dentry->d_inode;
1027         struct inode *new_inode = new_dentry->d_inode;
1028         struct inode *orphan_dir = NULL;
1029         struct ocfs2_dinode *newfe = NULL;
1030         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1031         struct buffer_head *newfe_bh = NULL;
1032         struct buffer_head *old_inode_bh = NULL;
1033         struct ocfs2_super *osb = NULL;
1034         u64 newfe_blkno, old_de_ino;
1035         handle_t *handle = NULL;
1036         struct buffer_head *old_dir_bh = NULL;
1037         struct buffer_head *new_dir_bh = NULL;
1038         nlink_t old_dir_nlink = old_dir->i_nlink;
1039         struct ocfs2_dinode *old_di;
1040         struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1041         struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1042         struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1043         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1044         struct ocfs2_dir_lookup_result target_insert = { NULL, };
1045
1046         /* At some point it might be nice to break this function up a
1047          * bit. */
1048
1049         mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n",
1050                    old_dir, old_dentry, new_dir, new_dentry,
1051                    old_dentry->d_name.len, old_dentry->d_name.name,
1052                    new_dentry->d_name.len, new_dentry->d_name.name);
1053
1054         osb = OCFS2_SB(old_dir->i_sb);
1055
1056         if (new_inode) {
1057                 if (!igrab(new_inode))
1058                         BUG();
1059         }
1060
1061         /* Assume a directory hierarchy thusly:
1062          * a/b/c
1063          * a/d
1064          * a,b,c, and d are all directories.
1065          *
1066          * from cwd of 'a' on both nodes:
1067          * node1: mv b/c d
1068          * node2: mv d   b/c
1069          *
1070          * And that's why, just like the VFS, we need a file system
1071          * rename lock. */
1072         if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1073                 status = ocfs2_rename_lock(osb);
1074                 if (status < 0) {
1075                         mlog_errno(status);
1076                         goto bail;
1077                 }
1078                 rename_lock = 1;
1079         }
1080
1081         /* if old and new are the same, this'll just do one lock. */
1082         status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1083                                    &new_dir_bh, new_dir);
1084         if (status < 0) {
1085                 mlog_errno(status);
1086                 goto bail;
1087         }
1088         parents_locked = 1;
1089
1090         /* make sure both dirs have bhs
1091          * get an extra ref on old_dir_bh if old==new */
1092         if (!new_dir_bh) {
1093                 if (old_dir_bh) {
1094                         new_dir_bh = old_dir_bh;
1095                         get_bh(new_dir_bh);
1096                 } else {
1097                         mlog(ML_ERROR, "no old_dir_bh!\n");
1098                         status = -EIO;
1099                         goto bail;
1100                 }
1101         }
1102
1103         /*
1104          * Aside from allowing a meta data update, the locking here
1105          * also ensures that the downconvert thread on other nodes
1106          * won't have to concurrently downconvert the inode and the
1107          * dentry locks.
1108          */
1109         status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1110                                          OI_LS_PARENT);
1111         if (status < 0) {
1112                 if (status != -ENOENT)
1113                         mlog_errno(status);
1114                 goto bail;
1115         }
1116         old_child_locked = 1;
1117
1118         status = ocfs2_remote_dentry_delete(old_dentry);
1119         if (status < 0) {
1120                 mlog_errno(status);
1121                 goto bail;
1122         }
1123
1124         if (S_ISDIR(old_inode->i_mode)) {
1125                 u64 old_inode_parent;
1126
1127                 update_dot_dot = 1;
1128                 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1129                                                   old_inode,
1130                                                   &old_inode_dot_dot_res);
1131                 if (status) {
1132                         status = -EIO;
1133                         goto bail;
1134                 }
1135
1136                 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1137                         status = -EIO;
1138                         goto bail;
1139                 }
1140
1141                 if (!new_inode && new_dir != old_dir &&
1142                     new_dir->i_nlink >= ocfs2_link_max(osb)) {
1143                         status = -EMLINK;
1144                         goto bail;
1145                 }
1146         }
1147
1148         status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1149                                             old_dentry->d_name.len,
1150                                             &old_de_ino);
1151         if (status) {
1152                 status = -ENOENT;
1153                 goto bail;
1154         }
1155
1156         /*
1157          *  Check for inode number is _not_ due to possible IO errors.
1158          *  We might rmdir the source, keep it as pwd of some process
1159          *  and merrily kill the link to whatever was created under the
1160          *  same name. Goodbye sticky bit ;-<
1161          */
1162         if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1163                 status = -ENOENT;
1164                 goto bail;
1165         }
1166
1167         /* check if the target already exists (in which case we need
1168          * to delete it */
1169         status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1170                                           new_dentry->d_name.len,
1171                                           &newfe_blkno, new_dir,
1172                                           &target_lookup_res);
1173         /* The only error we allow here is -ENOENT because the new
1174          * file not existing is perfectly valid. */
1175         if ((status < 0) && (status != -ENOENT)) {
1176                 /* If we cannot find the file specified we should just */
1177                 /* return the error... */
1178                 mlog_errno(status);
1179                 goto bail;
1180         }
1181         if (status == 0)
1182                 target_exists = 1;
1183
1184         if (!target_exists && new_inode) {
1185                 /*
1186                  * Target was unlinked by another node while we were
1187                  * waiting to get to ocfs2_rename(). There isn't
1188                  * anything we can do here to help the situation, so
1189                  * bubble up the appropriate error.
1190                  */
1191                 status = -ENOENT;
1192                 goto bail;
1193         }
1194
1195         /* In case we need to overwrite an existing file, we blow it
1196          * away first */
1197         if (target_exists) {
1198                 /* VFS didn't think there existed an inode here, but
1199                  * someone else in the cluster must have raced our
1200                  * rename to create one. Today we error cleanly, in
1201                  * the future we should consider calling iget to build
1202                  * a new struct inode for this entry. */
1203                 if (!new_inode) {
1204                         status = -EACCES;
1205
1206                         mlog(0, "We found an inode for name %.*s but VFS "
1207                              "didn't give us one.\n", new_dentry->d_name.len,
1208                              new_dentry->d_name.name);
1209                         goto bail;
1210                 }
1211
1212                 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1213                         status = -EACCES;
1214
1215                         mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n",
1216                              (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1217                              (unsigned long long)newfe_blkno,
1218                              OCFS2_I(new_inode)->ip_flags);
1219                         goto bail;
1220                 }
1221
1222                 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1223                 if (status < 0) {
1224                         if (status != -ENOENT)
1225                                 mlog_errno(status);
1226                         goto bail;
1227                 }
1228                 new_child_locked = 1;
1229
1230                 status = ocfs2_remote_dentry_delete(new_dentry);
1231                 if (status < 0) {
1232                         mlog_errno(status);
1233                         goto bail;
1234                 }
1235
1236                 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1237
1238                 mlog(0, "aha rename over existing... new_blkno=%llu "
1239                      "newfebh=%p bhblocknr=%llu\n",
1240                      (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1241                      (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1242
1243                 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1244                         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1245                                                 OCFS2_I(new_inode)->ip_blkno,
1246                                                 orphan_name, &orphan_insert);
1247                         if (status < 0) {
1248                                 mlog_errno(status);
1249                                 goto bail;
1250                         }
1251                 }
1252         } else {
1253                 BUG_ON(new_dentry->d_parent->d_inode != new_dir);
1254
1255                 status = ocfs2_check_dir_for_entry(new_dir,
1256                                                    new_dentry->d_name.name,
1257                                                    new_dentry->d_name.len);
1258                 if (status)
1259                         goto bail;
1260
1261                 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1262                                                       new_dentry->d_name.name,
1263                                                       new_dentry->d_name.len,
1264                                                       &target_insert);
1265                 if (status < 0) {
1266                         mlog_errno(status);
1267                         goto bail;
1268                 }
1269         }
1270
1271         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1272         if (IS_ERR(handle)) {
1273                 status = PTR_ERR(handle);
1274                 handle = NULL;
1275                 mlog_errno(status);
1276                 goto bail;
1277         }
1278
1279         if (target_exists) {
1280                 if (S_ISDIR(new_inode->i_mode)) {
1281                         if (new_inode->i_nlink != 2 ||
1282                             !ocfs2_empty_dir(new_inode)) {
1283                                 status = -ENOTEMPTY;
1284                                 goto bail;
1285                         }
1286                 }
1287                 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1288                                                  newfe_bh,
1289                                                  OCFS2_JOURNAL_ACCESS_WRITE);
1290                 if (status < 0) {
1291                         mlog_errno(status);
1292                         goto bail;
1293                 }
1294
1295                 if (S_ISDIR(new_inode->i_mode) ||
1296                     (ocfs2_read_links_count(newfe) == 1)) {
1297                         status = ocfs2_orphan_add(osb, handle, new_inode,
1298                                                   newfe, orphan_name,
1299                                                   &orphan_insert, orphan_dir);
1300                         if (status < 0) {
1301                                 mlog_errno(status);
1302                                 goto bail;
1303                         }
1304                 }
1305
1306                 /* change the dirent to point to the correct inode */
1307                 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1308                                             old_inode);
1309                 if (status < 0) {
1310                         mlog_errno(status);
1311                         goto bail;
1312                 }
1313                 new_dir->i_version++;
1314
1315                 if (S_ISDIR(new_inode->i_mode))
1316                         ocfs2_set_links_count(newfe, 0);
1317                 else
1318                         ocfs2_add_links_count(newfe, -1);
1319
1320                 status = ocfs2_journal_dirty(handle, newfe_bh);
1321                 if (status < 0) {
1322                         mlog_errno(status);
1323                         goto bail;
1324                 }
1325         } else {
1326                 /* if the name was not found in new_dir, add it now */
1327                 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1328                                          OCFS2_I(old_inode)->ip_blkno,
1329                                          new_dir_bh, &target_insert);
1330         }
1331
1332         old_inode->i_ctime = CURRENT_TIME;
1333         mark_inode_dirty(old_inode);
1334
1335         status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1336                                          old_inode_bh,
1337                                          OCFS2_JOURNAL_ACCESS_WRITE);
1338         if (status >= 0) {
1339                 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1340
1341                 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1342                 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1343
1344                 status = ocfs2_journal_dirty(handle, old_inode_bh);
1345                 if (status < 0)
1346                         mlog_errno(status);
1347         } else
1348                 mlog_errno(status);
1349
1350         /*
1351          * Now that the name has been added to new_dir, remove the old name.
1352          *
1353          * We don't keep any directory entry context around until now
1354          * because the insert might have changed the type of directory
1355          * we're dealing with.
1356          */
1357         status = ocfs2_find_entry(old_dentry->d_name.name,
1358                                   old_dentry->d_name.len, old_dir,
1359                                   &old_entry_lookup);
1360         if (status)
1361                 goto bail;
1362
1363         status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1364         if (status < 0) {
1365                 mlog_errno(status);
1366                 goto bail;
1367         }
1368
1369         if (new_inode) {
1370                 new_inode->i_nlink--;
1371                 new_inode->i_ctime = CURRENT_TIME;
1372         }
1373         old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1374
1375         if (update_dot_dot) {
1376                 status = ocfs2_update_entry(old_inode, handle,
1377                                             &old_inode_dot_dot_res, new_dir);
1378                 old_dir->i_nlink--;
1379                 if (new_inode) {
1380                         new_inode->i_nlink--;
1381                 } else {
1382                         inc_nlink(new_dir);
1383                         mark_inode_dirty(new_dir);
1384                 }
1385         }
1386         mark_inode_dirty(old_dir);
1387         ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1388         if (new_inode) {
1389                 mark_inode_dirty(new_inode);
1390                 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1391         }
1392
1393         if (old_dir != new_dir) {
1394                 /* Keep the same times on both directories.*/
1395                 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1396
1397                 /*
1398                  * This will also pick up the i_nlink change from the
1399                  * block above.
1400                  */
1401                 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1402         }
1403
1404         if (old_dir_nlink != old_dir->i_nlink) {
1405                 if (!old_dir_bh) {
1406                         mlog(ML_ERROR, "need to change nlink for old dir "
1407                              "%llu from %d to %d but bh is NULL!\n",
1408                              (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1409                              (int)old_dir_nlink, old_dir->i_nlink);
1410                 } else {
1411                         struct ocfs2_dinode *fe;
1412                         status = ocfs2_journal_access_di(handle,
1413                                                          INODE_CACHE(old_dir),
1414                                                          old_dir_bh,
1415                                                          OCFS2_JOURNAL_ACCESS_WRITE);
1416                         fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1417                         ocfs2_set_links_count(fe, old_dir->i_nlink);
1418                         status = ocfs2_journal_dirty(handle, old_dir_bh);
1419                 }
1420         }
1421         ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1422         status = 0;
1423 bail:
1424         if (rename_lock)
1425                 ocfs2_rename_unlock(osb);
1426
1427         if (handle)
1428                 ocfs2_commit_trans(osb, handle);
1429
1430         if (parents_locked)
1431                 ocfs2_double_unlock(old_dir, new_dir);
1432
1433         if (old_child_locked)
1434                 ocfs2_inode_unlock(old_inode, 1);
1435
1436         if (new_child_locked)
1437                 ocfs2_inode_unlock(new_inode, 1);
1438
1439         if (orphan_dir) {
1440                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1441                 ocfs2_inode_unlock(orphan_dir, 1);
1442                 mutex_unlock(&orphan_dir->i_mutex);
1443                 iput(orphan_dir);
1444         }
1445
1446         if (new_inode)
1447                 sync_mapping_buffers(old_inode->i_mapping);
1448
1449         if (new_inode)
1450                 iput(new_inode);
1451
1452         ocfs2_free_dir_lookup_result(&target_lookup_res);
1453         ocfs2_free_dir_lookup_result(&old_entry_lookup);
1454         ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1455         ocfs2_free_dir_lookup_result(&orphan_insert);
1456         ocfs2_free_dir_lookup_result(&target_insert);
1457
1458         brelse(newfe_bh);
1459         brelse(old_inode_bh);
1460         brelse(old_dir_bh);
1461         brelse(new_dir_bh);
1462
1463         mlog_exit(status);
1464
1465         return status;
1466 }
1467
1468 /*
1469  * we expect i_size = strlen(symname). Copy symname into the file
1470  * data, including the null terminator.
1471  */
1472 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1473                                      handle_t *handle,
1474                                      struct inode *inode,
1475                                      const char *symname)
1476 {
1477         struct buffer_head **bhs = NULL;
1478         const char *c;
1479         struct super_block *sb = osb->sb;
1480         u64 p_blkno, p_blocks;
1481         int virtual, blocks, status, i, bytes_left;
1482
1483         bytes_left = i_size_read(inode) + 1;
1484         /* we can't trust i_blocks because we're actually going to
1485          * write i_size + 1 bytes. */
1486         blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1487
1488         mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n",
1489                         (unsigned long long)inode->i_blocks,
1490                         i_size_read(inode), blocks);
1491
1492         /* Sanity check -- make sure we're going to fit. */
1493         if (bytes_left >
1494             ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1495                 status = -EIO;
1496                 mlog_errno(status);
1497                 goto bail;
1498         }
1499
1500         bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1501         if (!bhs) {
1502                 status = -ENOMEM;
1503                 mlog_errno(status);
1504                 goto bail;
1505         }
1506
1507         status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1508                                              NULL);
1509         if (status < 0) {
1510                 mlog_errno(status);
1511                 goto bail;
1512         }
1513
1514         /* links can never be larger than one cluster so we know this
1515          * is all going to be contiguous, but do a sanity check
1516          * anyway. */
1517         if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1518                 status = -EIO;
1519                 mlog_errno(status);
1520                 goto bail;
1521         }
1522
1523         virtual = 0;
1524         while(bytes_left > 0) {
1525                 c = &symname[virtual * sb->s_blocksize];
1526
1527                 bhs[virtual] = sb_getblk(sb, p_blkno);
1528                 if (!bhs[virtual]) {
1529                         status = -ENOMEM;
1530                         mlog_errno(status);
1531                         goto bail;
1532                 }
1533                 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1534                                               bhs[virtual]);
1535
1536                 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1537                                               bhs[virtual],
1538                                               OCFS2_JOURNAL_ACCESS_CREATE);
1539                 if (status < 0) {
1540                         mlog_errno(status);
1541                         goto bail;
1542                 }
1543
1544                 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1545
1546                 memcpy(bhs[virtual]->b_data, c,
1547                        (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1548                        bytes_left);
1549
1550                 status = ocfs2_journal_dirty(handle, bhs[virtual]);
1551                 if (status < 0) {
1552                         mlog_errno(status);
1553                         goto bail;
1554                 }
1555
1556                 virtual++;
1557                 p_blkno++;
1558                 bytes_left -= sb->s_blocksize;
1559         }
1560
1561         status = 0;
1562 bail:
1563
1564         if (bhs) {
1565                 for(i = 0; i < blocks; i++)
1566                         brelse(bhs[i]);
1567                 kfree(bhs);
1568         }
1569
1570         mlog_exit(status);
1571         return status;
1572 }
1573
1574 static int ocfs2_symlink(struct inode *dir,
1575                          struct dentry *dentry,
1576                          const char *symname)
1577 {
1578         int status, l, credits;
1579         u64 newsize;
1580         struct ocfs2_super *osb = NULL;
1581         struct inode *inode = NULL;
1582         struct super_block *sb;
1583         struct buffer_head *new_fe_bh = NULL;
1584         struct buffer_head *parent_fe_bh = NULL;
1585         struct ocfs2_dinode *fe = NULL;
1586         struct ocfs2_dinode *dirfe;
1587         handle_t *handle = NULL;
1588         struct ocfs2_alloc_context *inode_ac = NULL;
1589         struct ocfs2_alloc_context *data_ac = NULL;
1590         struct ocfs2_alloc_context *xattr_ac = NULL;
1591         int want_clusters = 0;
1592         int xattr_credits = 0;
1593         struct ocfs2_security_xattr_info si = {
1594                 .enable = 1,
1595         };
1596         int did_quota = 0, did_quota_inode = 0;
1597         struct ocfs2_dir_lookup_result lookup = { NULL, };
1598
1599         mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir,
1600                    dentry, symname, dentry->d_name.len, dentry->d_name.name);
1601
1602         sb = dir->i_sb;
1603         osb = OCFS2_SB(sb);
1604
1605         l = strlen(symname) + 1;
1606
1607         credits = ocfs2_calc_symlink_credits(sb);
1608
1609         /* lock the parent directory */
1610         status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1611         if (status < 0) {
1612                 if (status != -ENOENT)
1613                         mlog_errno(status);
1614                 return status;
1615         }
1616
1617         dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1618         if (!ocfs2_read_links_count(dirfe)) {
1619                 /* can't make a file in a deleted directory. */
1620                 status = -ENOENT;
1621                 goto bail;
1622         }
1623
1624         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1625                                            dentry->d_name.len);
1626         if (status)
1627                 goto bail;
1628
1629         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1630                                               dentry->d_name.name,
1631                                               dentry->d_name.len, &lookup);
1632         if (status < 0) {
1633                 mlog_errno(status);
1634                 goto bail;
1635         }
1636
1637         status = ocfs2_reserve_new_inode(osb, &inode_ac);
1638         if (status < 0) {
1639                 if (status != -ENOSPC)
1640                         mlog_errno(status);
1641                 goto bail;
1642         }
1643
1644         inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1645         if (!inode) {
1646                 status = -ENOMEM;
1647                 mlog_errno(status);
1648                 goto bail;
1649         }
1650
1651         /* get security xattr */
1652         status = ocfs2_init_security_get(inode, dir, &si);
1653         if (status) {
1654                 if (status == -EOPNOTSUPP)
1655                         si.enable = 0;
1656                 else {
1657                         mlog_errno(status);
1658                         goto bail;
1659                 }
1660         }
1661
1662         /* calculate meta data/clusters for setting security xattr */
1663         if (si.enable) {
1664                 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1665                                                   &xattr_credits, &xattr_ac);
1666                 if (status < 0) {
1667                         mlog_errno(status);
1668                         goto bail;
1669                 }
1670         }
1671
1672         /* don't reserve bitmap space for fast symlinks. */
1673         if (l > ocfs2_fast_symlink_chars(sb))
1674                 want_clusters += 1;
1675
1676         status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1677         if (status < 0) {
1678                 if (status != -ENOSPC)
1679                         mlog_errno(status);
1680                 goto bail;
1681         }
1682
1683         handle = ocfs2_start_trans(osb, credits + xattr_credits);
1684         if (IS_ERR(handle)) {
1685                 status = PTR_ERR(handle);
1686                 handle = NULL;
1687                 mlog_errno(status);
1688                 goto bail;
1689         }
1690
1691         /* We don't use standard VFS wrapper because we don't want vfs_dq_init
1692          * to be called. */
1693         if (sb_any_quota_active(osb->sb) &&
1694             osb->sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA) {
1695                 status = -EDQUOT;
1696                 goto bail;
1697         }
1698         did_quota_inode = 1;
1699
1700         mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry,
1701                    inode->i_mode, dentry->d_name.len,
1702                    dentry->d_name.name);
1703
1704         status = ocfs2_mknod_locked(osb, dir, inode,
1705                                     0, &new_fe_bh, parent_fe_bh, handle,
1706                                     inode_ac);
1707         if (status < 0) {
1708                 mlog_errno(status);
1709                 goto bail;
1710         }
1711
1712         fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1713         inode->i_rdev = 0;
1714         newsize = l - 1;
1715         if (l > ocfs2_fast_symlink_chars(sb)) {
1716                 u32 offset = 0;
1717
1718                 inode->i_op = &ocfs2_symlink_inode_operations;
1719                 if (vfs_dq_alloc_space_nodirty(inode,
1720                     ocfs2_clusters_to_bytes(osb->sb, 1))) {
1721                         status = -EDQUOT;
1722                         goto bail;
1723                 }
1724                 did_quota = 1;
1725                 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1726                                               new_fe_bh,
1727                                               handle, data_ac, NULL,
1728                                               NULL);
1729                 if (status < 0) {
1730                         if (status != -ENOSPC && status != -EINTR) {
1731                                 mlog(ML_ERROR,
1732                                      "Failed to extend file to %llu\n",
1733                                      (unsigned long long)newsize);
1734                                 mlog_errno(status);
1735                                 status = -ENOSPC;
1736                         }
1737                         goto bail;
1738                 }
1739                 i_size_write(inode, newsize);
1740                 inode->i_blocks = ocfs2_inode_sector_count(inode);
1741         } else {
1742                 inode->i_op = &ocfs2_fast_symlink_inode_operations;
1743                 memcpy((char *) fe->id2.i_symlink, symname, l);
1744                 i_size_write(inode, newsize);
1745                 inode->i_blocks = 0;
1746         }
1747
1748         status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1749         if (status < 0) {
1750                 mlog_errno(status);
1751                 goto bail;
1752         }
1753
1754         if (!ocfs2_inode_is_fast_symlink(inode)) {
1755                 status = ocfs2_create_symlink_data(osb, handle, inode,
1756                                                    symname);
1757                 if (status < 0) {
1758                         mlog_errno(status);
1759                         goto bail;
1760                 }
1761         }
1762
1763         if (si.enable) {
1764                 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1765                                                  xattr_ac, data_ac);
1766                 if (status < 0) {
1767                         mlog_errno(status);
1768                         goto bail;
1769                 }
1770         }
1771
1772         status = ocfs2_add_entry(handle, dentry, inode,
1773                                  le64_to_cpu(fe->i_blkno), parent_fe_bh,
1774                                  &lookup);
1775         if (status < 0) {
1776                 mlog_errno(status);
1777                 goto bail;
1778         }
1779
1780         status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1781         if (status) {
1782                 mlog_errno(status);
1783                 goto bail;
1784         }
1785
1786         insert_inode_hash(inode);
1787         dentry->d_op = &ocfs2_dentry_ops;
1788         d_instantiate(dentry, inode);
1789 bail:
1790         if (status < 0 && did_quota)
1791                 vfs_dq_free_space_nodirty(inode,
1792                                         ocfs2_clusters_to_bytes(osb->sb, 1));
1793         if (status < 0 && did_quota_inode)
1794                 vfs_dq_free_inode(inode);
1795         if (handle)
1796                 ocfs2_commit_trans(osb, handle);
1797
1798         ocfs2_inode_unlock(dir, 1);
1799
1800         brelse(new_fe_bh);
1801         brelse(parent_fe_bh);
1802         kfree(si.name);
1803         kfree(si.value);
1804         ocfs2_free_dir_lookup_result(&lookup);
1805         if (inode_ac)
1806                 ocfs2_free_alloc_context(inode_ac);
1807         if (data_ac)
1808                 ocfs2_free_alloc_context(data_ac);
1809         if (xattr_ac)
1810                 ocfs2_free_alloc_context(xattr_ac);
1811         if ((status < 0) && inode) {
1812                 clear_nlink(inode);
1813                 iput(inode);
1814         }
1815
1816         mlog_exit(status);
1817
1818         return status;
1819 }
1820
1821 static int ocfs2_blkno_stringify(u64 blkno, char *name)
1822 {
1823         int status, namelen;
1824
1825         mlog_entry_void();
1826
1827         namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
1828                            (long long)blkno);
1829         if (namelen <= 0) {
1830                 if (namelen)
1831                         status = namelen;
1832                 else
1833                         status = -EINVAL;
1834                 mlog_errno(status);
1835                 goto bail;
1836         }
1837         if (namelen != OCFS2_ORPHAN_NAMELEN) {
1838                 status = -EINVAL;
1839                 mlog_errno(status);
1840                 goto bail;
1841         }
1842
1843         mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name,
1844              namelen);
1845
1846         status = 0;
1847 bail:
1848         mlog_exit(status);
1849         return status;
1850 }
1851
1852 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
1853                                     struct inode **ret_orphan_dir,
1854                                     u64 blkno,
1855                                     char *name,
1856                                     struct ocfs2_dir_lookup_result *lookup)
1857 {
1858         struct inode *orphan_dir_inode;
1859         struct buffer_head *orphan_dir_bh = NULL;
1860         int status = 0;
1861
1862         status = ocfs2_blkno_stringify(blkno, name);
1863         if (status < 0) {
1864                 mlog_errno(status);
1865                 return status;
1866         }
1867
1868         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
1869                                                        ORPHAN_DIR_SYSTEM_INODE,
1870                                                        osb->slot_num);
1871         if (!orphan_dir_inode) {
1872                 status = -ENOENT;
1873                 mlog_errno(status);
1874                 return status;
1875         }
1876
1877         mutex_lock(&orphan_dir_inode->i_mutex);
1878
1879         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
1880         if (status < 0) {
1881                 mlog_errno(status);
1882                 goto leave;
1883         }
1884
1885         status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
1886                                               orphan_dir_bh, name,
1887                                               OCFS2_ORPHAN_NAMELEN, lookup);
1888         if (status < 0) {
1889                 ocfs2_inode_unlock(orphan_dir_inode, 1);
1890
1891                 mlog_errno(status);
1892                 goto leave;
1893         }
1894
1895         *ret_orphan_dir = orphan_dir_inode;
1896
1897 leave:
1898         if (status) {
1899                 mutex_unlock(&orphan_dir_inode->i_mutex);
1900                 iput(orphan_dir_inode);
1901         }
1902
1903         brelse(orphan_dir_bh);
1904
1905         mlog_exit(status);
1906         return status;
1907 }
1908
1909 static int ocfs2_orphan_add(struct ocfs2_super *osb,
1910                             handle_t *handle,
1911                             struct inode *inode,
1912                             struct ocfs2_dinode *fe,
1913                             char *name,
1914                             struct ocfs2_dir_lookup_result *lookup,
1915                             struct inode *orphan_dir_inode)
1916 {
1917         struct buffer_head *orphan_dir_bh = NULL;
1918         int status = 0;
1919         struct ocfs2_dinode *orphan_fe;
1920
1921         mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);
1922
1923         status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
1924         if (status < 0) {
1925                 mlog_errno(status);
1926                 goto leave;
1927         }
1928
1929         status = ocfs2_journal_access_di(handle,
1930                                          INODE_CACHE(orphan_dir_inode),
1931                                          orphan_dir_bh,
1932                                          OCFS2_JOURNAL_ACCESS_WRITE);
1933         if (status < 0) {
1934                 mlog_errno(status);
1935                 goto leave;
1936         }
1937
1938         /* we're a cluster, and nlink can change on disk from
1939          * underneath us... */
1940         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
1941         if (S_ISDIR(inode->i_mode))
1942                 ocfs2_add_links_count(orphan_fe, 1);
1943         orphan_dir_inode->i_nlink = ocfs2_read_links_count(orphan_fe);
1944
1945         status = ocfs2_journal_dirty(handle, orphan_dir_bh);
1946         if (status < 0) {
1947                 mlog_errno(status);
1948                 goto leave;
1949         }
1950
1951         status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
1952                                    OCFS2_ORPHAN_NAMELEN, inode,
1953                                    OCFS2_I(inode)->ip_blkno,
1954                                    orphan_dir_bh, lookup);
1955         if (status < 0) {
1956                 mlog_errno(status);
1957                 goto leave;
1958         }
1959
1960         le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL);
1961
1962         /* Record which orphan dir our inode now resides
1963          * in. delete_inode will use this to determine which orphan
1964          * dir to lock. */
1965         fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
1966
1967         mlog(0, "Inode %llu orphaned in slot %d\n",
1968              (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num);
1969
1970 leave:
1971         brelse(orphan_dir_bh);
1972
1973         mlog_exit(status);
1974         return status;
1975 }
1976
1977 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
1978 int ocfs2_orphan_del(struct ocfs2_super *osb,
1979                      handle_t *handle,
1980                      struct inode *orphan_dir_inode,
1981                      struct inode *inode,
1982                      struct buffer_head *orphan_dir_bh)
1983 {
1984         char name[OCFS2_ORPHAN_NAMELEN + 1];
1985         struct ocfs2_dinode *orphan_fe;
1986         int status = 0;
1987         struct ocfs2_dir_lookup_result lookup = { NULL, };
1988
1989         mlog_entry_void();
1990
1991         status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
1992         if (status < 0) {
1993                 mlog_errno(status);
1994                 goto leave;
1995         }
1996
1997         mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n",
1998              name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
1999              OCFS2_ORPHAN_NAMELEN);
2000
2001         /* find it's spot in the orphan directory */
2002         status = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, orphan_dir_inode,
2003                                   &lookup);
2004         if (status) {
2005                 mlog_errno(status);
2006                 goto leave;
2007         }
2008
2009         /* remove it from the orphan directory */
2010         status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2011         if (status < 0) {
2012                 mlog_errno(status);
2013                 goto leave;
2014         }
2015
2016         status = ocfs2_journal_access_di(handle,
2017                                          INODE_CACHE(orphan_dir_inode),
2018                                          orphan_dir_bh,
2019                                          OCFS2_JOURNAL_ACCESS_WRITE);
2020         if (status < 0) {
2021                 mlog_errno(status);
2022                 goto leave;
2023         }
2024
2025         /* do the i_nlink dance! :) */
2026         orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2027         if (S_ISDIR(inode->i_mode))
2028                 ocfs2_add_links_count(orphan_fe, -1);
2029         orphan_dir_inode->i_nlink = ocfs2_read_links_count(orphan_fe);
2030
2031         status = ocfs2_journal_dirty(handle, orphan_dir_bh);
2032         if (status < 0) {
2033                 mlog_errno(status);
2034                 goto leave;
2035         }
2036
2037 leave:
2038         ocfs2_free_dir_lookup_result(&lookup);
2039
2040         mlog_exit(status);
2041         return status;
2042 }
2043
2044 int ocfs2_create_inode_in_orphan(struct inode *dir,
2045                                  int mode,
2046                                  struct inode **new_inode)
2047 {
2048         int status, did_quota_inode = 0;
2049         struct inode *inode = NULL;
2050         struct inode *orphan_dir = NULL;
2051         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2052         struct ocfs2_dinode *di = NULL;
2053         handle_t *handle = NULL;
2054         char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2055         struct buffer_head *parent_di_bh = NULL;
2056         struct buffer_head *new_di_bh = NULL;
2057         struct ocfs2_alloc_context *inode_ac = NULL;
2058         struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2059
2060         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2061         if (status < 0) {
2062                 if (status != -ENOENT)
2063                         mlog_errno(status);
2064                 return status;
2065         }
2066
2067         /*
2068          * We give the orphan dir the root blkno to fake an orphan name,
2069          * and allocate enough space for our insertion.
2070          */
2071         status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
2072                                           osb->root_blkno,
2073                                           orphan_name, &orphan_insert);
2074         if (status < 0) {
2075                 mlog_errno(status);
2076                 goto leave;
2077         }
2078
2079         /* reserve an inode spot */
2080         status = ocfs2_reserve_new_inode(osb, &inode_ac);
2081         if (status < 0) {
2082                 if (status != -ENOSPC)
2083                         mlog_errno(status);
2084                 goto leave;
2085         }
2086
2087         inode = ocfs2_get_init_inode(dir, mode);
2088         if (!inode) {
2089                 status = -ENOMEM;
2090                 mlog_errno(status);
2091                 goto leave;
2092         }
2093
2094         handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2095         if (IS_ERR(handle)) {
2096                 status = PTR_ERR(handle);
2097                 handle = NULL;
2098                 mlog_errno(status);
2099                 goto leave;
2100         }
2101
2102         /* We don't use standard VFS wrapper because we don't want vfs_dq_init
2103          * to be called. */
2104         if (sb_any_quota_active(osb->sb) &&
2105             osb->sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA) {
2106                 status = -EDQUOT;
2107                 goto leave;
2108         }
2109         did_quota_inode = 1;
2110
2111         inode->i_nlink = 0;
2112         /* do the real work now. */
2113         status = ocfs2_mknod_locked(osb, dir, inode,
2114                                     0, &new_di_bh, parent_di_bh, handle,
2115                                     inode_ac);
2116         if (status < 0) {
2117                 mlog_errno(status);
2118                 goto leave;
2119         }
2120
2121         status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, orphan_name);
2122         if (status < 0) {
2123                 mlog_errno(status);
2124                 goto leave;
2125         }
2126
2127         di = (struct ocfs2_dinode *)new_di_bh->b_data;
2128         status = ocfs2_orphan_add(osb, handle, inode, di, orphan_name,
2129                                   &orphan_insert, orphan_dir);
2130         if (status < 0) {
2131                 mlog_errno(status);
2132                 goto leave;
2133         }
2134
2135         /* get open lock so that only nodes can't remove it from orphan dir. */
2136         status = ocfs2_open_lock(inode);
2137         if (status < 0)
2138                 mlog_errno(status);
2139
2140         insert_inode_hash(inode);
2141 leave:
2142         if (status < 0 && did_quota_inode)
2143                 vfs_dq_free_inode(inode);
2144         if (handle)
2145                 ocfs2_commit_trans(osb, handle);
2146
2147         if (orphan_dir) {
2148                 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2149                 ocfs2_inode_unlock(orphan_dir, 1);
2150                 mutex_unlock(&orphan_dir->i_mutex);
2151                 iput(orphan_dir);
2152         }
2153
2154         if (status == -ENOSPC)
2155                 mlog(0, "Disk is full\n");
2156
2157         if ((status < 0) && inode) {
2158                 clear_nlink(inode);
2159                 iput(inode);
2160         }
2161
2162         if (inode_ac)
2163                 ocfs2_free_alloc_context(inode_ac);
2164
2165         brelse(new_di_bh);
2166
2167         if (!status)
2168                 *new_inode = inode;
2169
2170         ocfs2_free_dir_lookup_result(&orphan_insert);
2171
2172         ocfs2_inode_unlock(dir, 1);
2173         brelse(parent_di_bh);
2174         return status;
2175 }
2176
2177 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2178                                    struct inode *inode,
2179                                    struct dentry *dentry)
2180 {
2181         int status = 0;
2182         struct buffer_head *parent_di_bh = NULL;
2183         handle_t *handle = NULL;
2184         struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2185         struct ocfs2_dinode *dir_di, *di;
2186         struct inode *orphan_dir_inode = NULL;
2187         struct buffer_head *orphan_dir_bh = NULL;
2188         struct buffer_head *di_bh = NULL;
2189         struct ocfs2_dir_lookup_result lookup = { NULL, };
2190
2191         mlog_entry("(0x%p, 0x%p, %.*s')\n", dir, dentry,
2192                    dentry->d_name.len, dentry->d_name.name);
2193
2194         status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2195         if (status < 0) {
2196                 if (status != -ENOENT)
2197                         mlog_errno(status);
2198                 return status;
2199         }
2200
2201         dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2202         if (!dir_di->i_links_count) {
2203                 /* can't make a file in a deleted directory. */
2204                 status = -ENOENT;
2205                 goto leave;
2206         }
2207
2208         status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2209                                            dentry->d_name.len);
2210         if (status)
2211                 goto leave;
2212
2213         /* get a spot inside the dir. */
2214         status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2215                                               dentry->d_name.name,
2216                                               dentry->d_name.len, &lookup);
2217         if (status < 0) {
2218                 mlog_errno(status);
2219                 goto leave;
2220         }
2221
2222         orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2223                                                        ORPHAN_DIR_SYSTEM_INODE,
2224                                                        osb->slot_num);
2225         if (!orphan_dir_inode) {
2226                 status = -EEXIST;
2227                 mlog_errno(status);
2228                 goto leave;
2229         }
2230
2231         mutex_lock(&orphan_dir_inode->i_mutex);
2232
2233         status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2234         if (status < 0) {
2235                 mlog_errno(status);
2236                 mutex_unlock(&orphan_dir_inode->i_mutex);
2237                 iput(orphan_dir_inode);
2238                 goto leave;
2239         }
2240
2241         status = ocfs2_read_inode_block(inode, &di_bh);
2242         if (status < 0) {
2243                 mlog_errno(status);
2244                 goto orphan_unlock;
2245         }
2246
2247         handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2248         if (IS_ERR(handle)) {
2249                 status = PTR_ERR(handle);
2250                 handle = NULL;
2251                 mlog_errno(status);
2252                 goto orphan_unlock;
2253         }
2254
2255         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2256                                          di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2257         if (status < 0) {
2258                 mlog_errno(status);
2259                 goto out_commit;
2260         }
2261
2262         status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2263                                   orphan_dir_bh);
2264         if (status < 0) {
2265                 mlog_errno(status);
2266                 goto out_commit;
2267         }
2268
2269         di = (struct ocfs2_dinode *)di_bh->b_data;
2270         le32_add_cpu(&di->i_flags, -OCFS2_ORPHANED_FL);
2271         di->i_orphaned_slot = 0;
2272         inode->i_nlink = 1;
2273         ocfs2_set_links_count(di, inode->i_nlink);
2274         ocfs2_journal_dirty(handle, di_bh);
2275
2276         status = ocfs2_add_entry(handle, dentry, inode,
2277                                  OCFS2_I(inode)->ip_blkno, parent_di_bh,
2278                                  &lookup);
2279         if (status < 0) {
2280                 mlog_errno(status);
2281                 goto out_commit;
2282         }
2283
2284         status = ocfs2_dentry_attach_lock(dentry, inode,
2285                                           OCFS2_I(dir)->ip_blkno);
2286         if (status) {
2287                 mlog_errno(status);
2288                 goto out_commit;
2289         }
2290
2291         dentry->d_op = &ocfs2_dentry_ops;
2292         d_instantiate(dentry, inode);
2293         status = 0;
2294 out_commit:
2295         ocfs2_commit_trans(osb, handle);
2296 orphan_unlock:
2297         ocfs2_inode_unlock(orphan_dir_inode, 1);
2298         mutex_unlock(&orphan_dir_inode->i_mutex);
2299         iput(orphan_dir_inode);
2300 leave:
2301
2302         ocfs2_inode_unlock(dir, 1);
2303
2304         brelse(di_bh);
2305         brelse(parent_di_bh);
2306         brelse(orphan_dir_bh);
2307
2308         ocfs2_free_dir_lookup_result(&lookup);
2309
2310         mlog_exit(status);
2311
2312         return status;
2313 }
2314
2315 const struct inode_operations ocfs2_dir_iops = {
2316         .create         = ocfs2_create,
2317         .lookup         = ocfs2_lookup,
2318         .link           = ocfs2_link,
2319         .unlink         = ocfs2_unlink,
2320         .rmdir          = ocfs2_unlink,
2321         .symlink        = ocfs2_symlink,
2322         .mkdir          = ocfs2_mkdir,
2323         .mknod          = ocfs2_mknod,
2324         .rename         = ocfs2_rename,
2325         .setattr        = ocfs2_setattr,
2326         .getattr        = ocfs2_getattr,
2327         .permission     = ocfs2_permission,
2328         .setxattr       = generic_setxattr,
2329         .getxattr       = generic_getxattr,
2330         .listxattr      = ocfs2_listxattr,
2331         .removexattr    = generic_removexattr,
2332         .fiemap         = ocfs2_fiemap,
2333 };