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staging: iio: Documentation fixes
[zen-stable.git] / fs / ocfs2 / namei.c
blobb1eb50ae40979a6451cbc5db003313a013868d54
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 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 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 dquot_initialize(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 dquot_initialize(dir);
248
249 /* get our super block */
250 osb = OCFS2_SB(dir->i_sb);
251
252 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
253 if (status < 0) {
254 if (status != -ENOENT)
255 mlog_errno(status);
256 return status;
257 }
258
259 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
260 status = -EMLINK;
261 goto leave;
262 }
263
264 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
265 if (!ocfs2_read_links_count(dirfe)) {
266 /* can't make a file in a deleted directory. */
267 status = -ENOENT;
268 goto leave;
269 }
270
271 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
272 dentry->d_name.len);
273 if (status)
274 goto leave;
275
276 /* get a spot inside the dir. */
277 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
278 dentry->d_name.name,
279 dentry->d_name.len, &lookup);
280 if (status < 0) {
281 mlog_errno(status);
282 goto leave;
283 }
284
285 /* reserve an inode spot */
286 status = ocfs2_reserve_new_inode(osb, &inode_ac);
287 if (status < 0) {
288 if (status != -ENOSPC)
289 mlog_errno(status);
290 goto leave;
291 }
292
293 inode = ocfs2_get_init_inode(dir, mode);
294 if (!inode) {
295 status = -ENOMEM;
296 mlog_errno(status);
297 goto leave;
298 }
299
300 /* get security xattr */
301 status = ocfs2_init_security_get(inode, dir, &si);
302 if (status) {
303 if (status == -EOPNOTSUPP)
304 si.enable = 0;
305 else {
306 mlog_errno(status);
307 goto leave;
308 }
309 }
310
311 /* calculate meta data/clusters for setting security and acl xattr */
312 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
313 &si, &want_clusters,
314 &xattr_credits, &want_meta);
315 if (status < 0) {
316 mlog_errno(status);
317 goto leave;
318 }
319
320 /* Reserve a cluster if creating an extent based directory. */
321 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
322 want_clusters += 1;
323
324 /* Dir indexing requires extra space as well */
325 if (ocfs2_supports_indexed_dirs(osb))
326 want_meta++;
327 }
328
329 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
330 if (status < 0) {
331 if (status != -ENOSPC)
332 mlog_errno(status);
333 goto leave;
334 }
335
336 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
337 if (status < 0) {
338 if (status != -ENOSPC)
339 mlog_errno(status);
340 goto leave;
341 }
342
343 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
344 S_ISDIR(mode),
345 xattr_credits));
346 if (IS_ERR(handle)) {
347 status = PTR_ERR(handle);
348 handle = NULL;
349 mlog_errno(status);
350 goto leave;
351 }
352
353 status = dquot_alloc_inode(inode);
354 if (status)
355 goto leave;
356 did_quota_inode = 1;
357
358 mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry,
359 inode->i_mode, (unsigned long)dev, dentry->d_name.len,
360 dentry->d_name.name);
361
362 /* do the real work now. */
363 status = ocfs2_mknod_locked(osb, dir, inode, dev,
364 &new_fe_bh, parent_fe_bh, handle,
365 inode_ac);
366 if (status < 0) {
367 mlog_errno(status);
368 goto leave;
369 }
370
371 if (S_ISDIR(mode)) {
372 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
373 new_fe_bh, data_ac, meta_ac);
374 if (status < 0) {
375 mlog_errno(status);
376 goto leave;
377 }
378
379 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
380 parent_fe_bh,
381 OCFS2_JOURNAL_ACCESS_WRITE);
382 if (status < 0) {
383 mlog_errno(status);
384 goto leave;
385 }
386 ocfs2_add_links_count(dirfe, 1);
387 status = ocfs2_journal_dirty(handle, parent_fe_bh);
388 if (status < 0) {
389 mlog_errno(status);
390 goto leave;
391 }
392 inc_nlink(dir);
393 }
394
395 status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
396 meta_ac, data_ac);
397 if (status < 0) {
398 mlog_errno(status);
399 goto leave;
400 }
401
402 if (si.enable) {
403 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
404 meta_ac, data_ac);
405 if (status < 0) {
406 mlog_errno(status);
407 goto leave;
408 }
409 }
410
411 status = ocfs2_add_entry(handle, dentry, inode,
412 OCFS2_I(inode)->ip_blkno, parent_fe_bh,
413 &lookup);
414 if (status < 0) {
415 mlog_errno(status);
416 goto leave;
417 }
418
419 status = ocfs2_dentry_attach_lock(dentry, inode,
420 OCFS2_I(dir)->ip_blkno);
421 if (status) {
422 mlog_errno(status);
423 goto leave;
424 }
425
426 insert_inode_hash(inode);
427 dentry->d_op = &ocfs2_dentry_ops;
428 d_instantiate(dentry, inode);
429 status = 0;
430 leave:
431 if (status < 0 && did_quota_inode)
432 dquot_free_inode(inode);
433 if (handle)
434 ocfs2_commit_trans(osb, handle);
435
436 ocfs2_inode_unlock(dir, 1);
437
438 if (status == -ENOSPC)
439 mlog(0, "Disk is full\n");
440
441 brelse(new_fe_bh);
442 brelse(parent_fe_bh);
443 kfree(si.name);
444 kfree(si.value);
445
446 ocfs2_free_dir_lookup_result(&lookup);
447
448 if ((status < 0) && inode) {
449 clear_nlink(inode);
450 iput(inode);
451 }
452
453 if (inode_ac)
454 ocfs2_free_alloc_context(inode_ac);
455
456 if (data_ac)
457 ocfs2_free_alloc_context(data_ac);
458
459 if (meta_ac)
460 ocfs2_free_alloc_context(meta_ac);
461
462 mlog_exit(status);
463
464 return status;
465 }
466
467 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
468 struct inode *dir,
469 struct inode *inode,
470 dev_t dev,
471 struct buffer_head **new_fe_bh,
472 struct buffer_head *parent_fe_bh,
473 handle_t *handle,
474 struct ocfs2_alloc_context *inode_ac)
475 {
476 int status = 0;
477 struct ocfs2_dinode *fe = NULL;
478 struct ocfs2_extent_list *fel;
479 u64 fe_blkno = 0;
480 u16 suballoc_bit;
481 u16 feat;
482
483 *new_fe_bh = NULL;
484
485 status = ocfs2_claim_new_inode(osb, handle, dir, parent_fe_bh,
486 inode_ac, &suballoc_bit, &fe_blkno);
487 if (status < 0) {
488 mlog_errno(status);
489 goto leave;
490 }
491
492 /* populate as many fields early on as possible - many of
493 * these are used by the support functions here and in
494 * callers. */
495 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
496 OCFS2_I(inode)->ip_blkno = fe_blkno;
497 spin_lock(&osb->osb_lock);
498 inode->i_generation = osb->s_next_generation++;
499 spin_unlock(&osb->osb_lock);
500
501 *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
502 if (!*new_fe_bh) {
503 status = -EIO;
504 mlog_errno(status);
505 goto leave;
506 }
507 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
508
509 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
510 *new_fe_bh,
511 OCFS2_JOURNAL_ACCESS_CREATE);
512 if (status < 0) {
513 mlog_errno(status);
514 goto leave;
515 }
516
517 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
518 memset(fe, 0, osb->sb->s_blocksize);
519
520 fe->i_generation = cpu_to_le32(inode->i_generation);
521 fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
522 fe->i_blkno = cpu_to_le64(fe_blkno);
523 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
524 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
525 fe->i_uid = cpu_to_le32(inode->i_uid);
526 fe->i_gid = cpu_to_le32(inode->i_gid);
527 fe->i_mode = cpu_to_le16(inode->i_mode);
528 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
529 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
530
531 ocfs2_set_links_count(fe, inode->i_nlink);
532
533 fe->i_last_eb_blk = 0;
534 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
535 le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL);
536 fe->i_atime = fe->i_ctime = fe->i_mtime =
537 cpu_to_le64(CURRENT_TIME.tv_sec);
538 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
539 cpu_to_le32(CURRENT_TIME.tv_nsec);
540 fe->i_dtime = 0;
541
542 /*
543 * If supported, directories start with inline data. If inline
544 * isn't supported, but indexing is, we start them as indexed.
545 */
546 feat = le16_to_cpu(fe->i_dyn_features);
547 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
548 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
549
550 fe->id2.i_data.id_count = cpu_to_le16(
551 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
552 } else {
553 fel = &fe->id2.i_list;
554 fel->l_tree_depth = 0;
555 fel->l_next_free_rec = 0;
556 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
557 }
558
559 status = ocfs2_journal_dirty(handle, *new_fe_bh);
560 if (status < 0) {
561 mlog_errno(status);
562 goto leave;
563 }
564
565 ocfs2_populate_inode(inode, fe, 1);
566 ocfs2_ci_set_new(osb, INODE_CACHE(inode));
567 if (!ocfs2_mount_local(osb)) {
568 status = ocfs2_create_new_inode_locks(inode);
569 if (status < 0)
570 mlog_errno(status);
571 }
572
573 status = 0; /* error in ocfs2_create_new_inode_locks is not
574 * critical */
575
576 leave:
577 if (status < 0) {
578 if (*new_fe_bh) {
579 brelse(*new_fe_bh);
580 *new_fe_bh = NULL;
581 }
582 }
583
584 mlog_exit(status);
585 return status;
586 }
587
588 static int ocfs2_mkdir(struct inode *dir,
589 struct dentry *dentry,
590 int mode)
591 {
592 int ret;
593
594 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
595 dentry->d_name.len, dentry->d_name.name);
596 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
597 mlog_exit(ret);
598
599 return ret;
600 }
601
602 static int ocfs2_create(struct inode *dir,
603 struct dentry *dentry,
604 int mode,
605 struct nameidata *nd)
606 {
607 int ret;
608
609 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
610 dentry->d_name.len, dentry->d_name.name);
611 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
612 mlog_exit(ret);
613
614 return ret;
615 }
616
617 static int ocfs2_link(struct dentry *old_dentry,
618 struct inode *dir,
619 struct dentry *dentry)
620 {
621 handle_t *handle;
622 struct inode *inode = old_dentry->d_inode;
623 int err;
624 struct buffer_head *fe_bh = NULL;
625 struct buffer_head *parent_fe_bh = NULL;
626 struct ocfs2_dinode *fe = NULL;
627 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
628 struct ocfs2_dir_lookup_result lookup = { NULL, };
629
630 mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino,
631 old_dentry->d_name.len, old_dentry->d_name.name,
632 dentry->d_name.len, dentry->d_name.name);
633
634 if (S_ISDIR(inode->i_mode))
635 return -EPERM;
636
637 dquot_initialize(dir);
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 dquot_initialize(dir);
795
796 BUG_ON(dentry->d_parent->d_inode != dir);
797
798 mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno);
799
800 if (inode == osb->root_inode) {
801 mlog(0, "Cannot delete the root directory\n");
802 return -EPERM;
803 }
804
805 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
806 OI_LS_PARENT);
807 if (status < 0) {
808 if (status != -ENOENT)
809 mlog_errno(status);
810 return status;
811 }
812
813 status = ocfs2_find_files_on_disk(dentry->d_name.name,
814 dentry->d_name.len, &blkno, dir,
815 &lookup);
816 if (status < 0) {
817 if (status != -ENOENT)
818 mlog_errno(status);
819 goto leave;
820 }
821
822 if (OCFS2_I(inode)->ip_blkno != blkno) {
823 status = -ENOENT;
824
825 mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n",
826 (unsigned long long)OCFS2_I(inode)->ip_blkno,
827 (unsigned long long)blkno, OCFS2_I(inode)->ip_flags);
828 goto leave;
829 }
830
831 status = ocfs2_inode_lock(inode, &fe_bh, 1);
832 if (status < 0) {
833 if (status != -ENOENT)
834 mlog_errno(status);
835 goto leave;
836 }
837 child_locked = 1;
838
839 if (S_ISDIR(inode->i_mode)) {
840 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
841 status = -ENOTEMPTY;
842 goto leave;
843 }
844 }
845
846 status = ocfs2_remote_dentry_delete(dentry);
847 if (status < 0) {
848 /* This remote delete should succeed under all normal
849 * circumstances. */
850 mlog_errno(status);
851 goto leave;
852 }
853
854 if (inode_is_unlinkable(inode)) {
855 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
856 OCFS2_I(inode)->ip_blkno,
857 orphan_name, &orphan_insert);
858 if (status < 0) {
859 mlog_errno(status);
860 goto leave;
861 }
862 }
863
864 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
865 if (IS_ERR(handle)) {
866 status = PTR_ERR(handle);
867 handle = NULL;
868 mlog_errno(status);
869 goto leave;
870 }
871
872 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
873 OCFS2_JOURNAL_ACCESS_WRITE);
874 if (status < 0) {
875 mlog_errno(status);
876 goto leave;
877 }
878
879 fe = (struct ocfs2_dinode *) fe_bh->b_data;
880
881 if (inode_is_unlinkable(inode)) {
882 status = ocfs2_orphan_add(osb, handle, inode, fe_bh, orphan_name,
883 &orphan_insert, orphan_dir);
884 if (status < 0) {
885 mlog_errno(status);
886 goto leave;
887 }
888 }
889
890 /* delete the name from the parent dir */
891 status = ocfs2_delete_entry(handle, dir, &lookup);
892 if (status < 0) {
893 mlog_errno(status);
894 goto leave;
895 }
896
897 if (S_ISDIR(inode->i_mode))
898 drop_nlink(inode);
899 drop_nlink(inode);
900 ocfs2_set_links_count(fe, inode->i_nlink);
901
902 status = ocfs2_journal_dirty(handle, fe_bh);
903 if (status < 0) {
904 mlog_errno(status);
905 goto leave;
906 }
907
908 dir->i_ctime = dir->i_mtime = CURRENT_TIME;
909 if (S_ISDIR(inode->i_mode))
910 drop_nlink(dir);
911
912 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
913 if (status < 0) {
914 mlog_errno(status);
915 if (S_ISDIR(inode->i_mode))
916 inc_nlink(dir);
917 }
918
919 leave:
920 if (handle)
921 ocfs2_commit_trans(osb, handle);
922
923 if (child_locked)
924 ocfs2_inode_unlock(inode, 1);
925
926 ocfs2_inode_unlock(dir, 1);
927
928 if (orphan_dir) {
929 /* This was locked for us in ocfs2_prepare_orphan_dir() */
930 ocfs2_inode_unlock(orphan_dir, 1);
931 mutex_unlock(&orphan_dir->i_mutex);
932 iput(orphan_dir);
933 }
934
935 brelse(fe_bh);
936 brelse(parent_node_bh);
937
938 ocfs2_free_dir_lookup_result(&orphan_insert);
939 ocfs2_free_dir_lookup_result(&lookup);
940
941 mlog_exit(status);
942
943 return status;
944 }
945
946 /*
947 * The only place this should be used is rename!
948 * if they have the same id, then the 1st one is the only one locked.
949 */
950 static int ocfs2_double_lock(struct ocfs2_super *osb,
951 struct buffer_head **bh1,
952 struct inode *inode1,
953 struct buffer_head **bh2,
954 struct inode *inode2)
955 {
956 int status;
957 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
958 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
959 struct buffer_head **tmpbh;
960 struct inode *tmpinode;
961
962 mlog_entry("(inode1 = %llu, inode2 = %llu)\n",
963 (unsigned long long)oi1->ip_blkno,
964 (unsigned long long)oi2->ip_blkno);
965
966 if (*bh1)
967 *bh1 = NULL;
968 if (*bh2)
969 *bh2 = NULL;
970
971 /* we always want to lock the one with the lower lockid first. */
972 if (oi1->ip_blkno != oi2->ip_blkno) {
973 if (oi1->ip_blkno < oi2->ip_blkno) {
974 /* switch id1 and id2 around */
975 mlog(0, "switching them around...\n");
976 tmpbh = bh2;
977 bh2 = bh1;
978 bh1 = tmpbh;
979
980 tmpinode = inode2;
981 inode2 = inode1;
982 inode1 = tmpinode;
983 }
984 /* lock id2 */
985 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
986 OI_LS_RENAME1);
987 if (status < 0) {
988 if (status != -ENOENT)
989 mlog_errno(status);
990 goto bail;
991 }
992 }
993
994 /* lock id1 */
995 status = ocfs2_inode_lock_nested(inode1, bh1, 1, OI_LS_RENAME2);
996 if (status < 0) {
997 /*
998 * An error return must mean that no cluster locks
999 * were held on function exit.
1000 */
1001 if (oi1->ip_blkno != oi2->ip_blkno)
1002 ocfs2_inode_unlock(inode2, 1);
1003
1004 if (status != -ENOENT)
1005 mlog_errno(status);
1006 }
1007
1008 bail:
1009 mlog_exit(status);
1010 return status;
1011 }
1012
1013 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1014 {
1015 ocfs2_inode_unlock(inode1, 1);
1016
1017 if (inode1 != inode2)
1018 ocfs2_inode_unlock(inode2, 1);
1019 }
1020
1021 static int ocfs2_rename(struct inode *old_dir,
1022 struct dentry *old_dentry,
1023 struct inode *new_dir,
1024 struct dentry *new_dentry)
1025 {
1026 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1027 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1028 struct inode *old_inode = old_dentry->d_inode;
1029 struct inode *new_inode = new_dentry->d_inode;
1030 struct inode *orphan_dir = NULL;
1031 struct ocfs2_dinode *newfe = NULL;
1032 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1033 struct buffer_head *newfe_bh = NULL;
1034 struct buffer_head *old_inode_bh = NULL;
1035 struct ocfs2_super *osb = NULL;
1036 u64 newfe_blkno, old_de_ino;
1037 handle_t *handle = NULL;
1038 struct buffer_head *old_dir_bh = NULL;
1039 struct buffer_head *new_dir_bh = NULL;
1040 nlink_t old_dir_nlink = old_dir->i_nlink;
1041 struct ocfs2_dinode *old_di;
1042 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1043 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1044 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1045 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1046 struct ocfs2_dir_lookup_result target_insert = { NULL, };
1047
1048 /* At some point it might be nice to break this function up a
1049 * bit. */
1050
1051 mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n",
1052 old_dir, old_dentry, new_dir, new_dentry,
1053 old_dentry->d_name.len, old_dentry->d_name.name,
1054 new_dentry->d_name.len, new_dentry->d_name.name);
1055
1056 dquot_initialize(old_dir);
1057 dquot_initialize(new_dir);
1058
1059 osb = OCFS2_SB(old_dir->i_sb);
1060
1061 if (new_inode) {
1062 if (!igrab(new_inode))
1063 BUG();
1064 }
1065
1066 /* Assume a directory hierarchy thusly:
1067 * a/b/c
1068 * a/d
1069 * a,b,c, and d are all directories.
1070 *
1071 * from cwd of 'a' on both nodes:
1072 * node1: mv b/c d
1073 * node2: mv d b/c
1074 *
1075 * And that's why, just like the VFS, we need a file system
1076 * rename lock. */
1077 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1078 status = ocfs2_rename_lock(osb);
1079 if (status < 0) {
1080 mlog_errno(status);
1081 goto bail;
1082 }
1083 rename_lock = 1;
1084 }
1085
1086 /* if old and new are the same, this'll just do one lock. */
1087 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1088 &new_dir_bh, new_dir);
1089 if (status < 0) {
1090 mlog_errno(status);
1091 goto bail;
1092 }
1093 parents_locked = 1;
1094
1095 /* make sure both dirs have bhs
1096 * get an extra ref on old_dir_bh if old==new */
1097 if (!new_dir_bh) {
1098 if (old_dir_bh) {
1099 new_dir_bh = old_dir_bh;
1100 get_bh(new_dir_bh);
1101 } else {
1102 mlog(ML_ERROR, "no old_dir_bh!\n");
1103 status = -EIO;
1104 goto bail;
1105 }
1106 }
1107
1108 /*
1109 * Aside from allowing a meta data update, the locking here
1110 * also ensures that the downconvert thread on other nodes
1111 * won't have to concurrently downconvert the inode and the
1112 * dentry locks.
1113 */
1114 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1115 OI_LS_PARENT);
1116 if (status < 0) {
1117 if (status != -ENOENT)
1118 mlog_errno(status);
1119 goto bail;
1120 }
1121 old_child_locked = 1;
1122
1123 status = ocfs2_remote_dentry_delete(old_dentry);
1124 if (status < 0) {
1125 mlog_errno(status);
1126 goto bail;
1127 }
1128
1129 if (S_ISDIR(old_inode->i_mode)) {
1130 u64 old_inode_parent;
1131
1132 update_dot_dot = 1;
1133 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1134 old_inode,
1135 &old_inode_dot_dot_res);
1136 if (status) {
1137 status = -EIO;
1138 goto bail;
1139 }
1140
1141 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1142 status = -EIO;
1143 goto bail;
1144 }
1145
1146 if (!new_inode && new_dir != old_dir &&
1147 new_dir->i_nlink >= ocfs2_link_max(osb)) {
1148 status = -EMLINK;
1149 goto bail;
1150 }
1151 }
1152
1153 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1154 old_dentry->d_name.len,
1155 &old_de_ino);
1156 if (status) {
1157 status = -ENOENT;
1158 goto bail;
1159 }
1160
1161 /*
1162 * Check for inode number is _not_ due to possible IO errors.
1163 * We might rmdir the source, keep it as pwd of some process
1164 * and merrily kill the link to whatever was created under the
1165 * same name. Goodbye sticky bit ;-<
1166 */
1167 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1168 status = -ENOENT;
1169 goto bail;
1170 }
1171
1172 /* check if the target already exists (in which case we need
1173 * to delete it */
1174 status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1175 new_dentry->d_name.len,
1176 &newfe_blkno, new_dir,
1177 &target_lookup_res);
1178 /* The only error we allow here is -ENOENT because the new
1179 * file not existing is perfectly valid. */
1180 if ((status < 0) && (status != -ENOENT)) {
1181 /* If we cannot find the file specified we should just */
1182 /* return the error... */
1183 mlog_errno(status);
1184 goto bail;
1185 }
1186 if (status == 0)
1187 target_exists = 1;
1188
1189 if (!target_exists && new_inode) {
1190 /*
1191 * Target was unlinked by another node while we were
1192 * waiting to get to ocfs2_rename(). There isn't
1193 * anything we can do here to help the situation, so
1194 * bubble up the appropriate error.
1195 */
1196 status = -ENOENT;
1197 goto bail;
1198 }
1199
1200 /* In case we need to overwrite an existing file, we blow it
1201 * away first */
1202 if (target_exists) {
1203 /* VFS didn't think there existed an inode here, but
1204 * someone else in the cluster must have raced our
1205 * rename to create one. Today we error cleanly, in
1206 * the future we should consider calling iget to build
1207 * a new struct inode for this entry. */
1208 if (!new_inode) {
1209 status = -EACCES;
1210
1211 mlog(0, "We found an inode for name %.*s but VFS "
1212 "didn't give us one.\n", new_dentry->d_name.len,
1213 new_dentry->d_name.name);
1214 goto bail;
1215 }
1216
1217 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1218 status = -EACCES;
1219
1220 mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n",
1221 (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1222 (unsigned long long)newfe_blkno,
1223 OCFS2_I(new_inode)->ip_flags);
1224 goto bail;
1225 }
1226
1227 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1228 if (status < 0) {
1229 if (status != -ENOENT)
1230 mlog_errno(status);
1231 goto bail;
1232 }
1233 new_child_locked = 1;
1234
1235 status = ocfs2_remote_dentry_delete(new_dentry);
1236 if (status < 0) {
1237 mlog_errno(status);
1238 goto bail;
1239 }
1240
1241 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1242
1243 mlog(0, "aha rename over existing... new_blkno=%llu "
1244 "newfebh=%p bhblocknr=%llu\n",
1245 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1246 (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1247
1248 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1249 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1250 OCFS2_I(new_inode)->ip_blkno,
1251 orphan_name, &orphan_insert);
1252 if (status < 0) {
1253 mlog_errno(status);
1254 goto bail;
1255 }
1256 }
1257 } else {
1258 BUG_ON(new_dentry->d_parent->d_inode != new_dir);
1259
1260 status = ocfs2_check_dir_for_entry(new_dir,
1261 new_dentry->d_name.name,
1262 new_dentry->d_name.len);
1263 if (status)
1264 goto bail;
1265
1266 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1267 new_dentry->d_name.name,
1268 new_dentry->d_name.len,
1269 &target_insert);
1270 if (status < 0) {
1271 mlog_errno(status);
1272 goto bail;
1273 }
1274 }
1275
1276 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1277 if (IS_ERR(handle)) {
1278 status = PTR_ERR(handle);
1279 handle = NULL;
1280 mlog_errno(status);
1281 goto bail;
1282 }
1283
1284 if (target_exists) {
1285 if (S_ISDIR(new_inode->i_mode)) {
1286 if (new_inode->i_nlink != 2 ||
1287 !ocfs2_empty_dir(new_inode)) {
1288 status = -ENOTEMPTY;
1289 goto bail;
1290 }
1291 }
1292 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1293 newfe_bh,
1294 OCFS2_JOURNAL_ACCESS_WRITE);
1295 if (status < 0) {
1296 mlog_errno(status);
1297 goto bail;
1298 }
1299
1300 if (S_ISDIR(new_inode->i_mode) ||
1301 (ocfs2_read_links_count(newfe) == 1)) {
1302 status = ocfs2_orphan_add(osb, handle, new_inode,
1303 newfe_bh, orphan_name,
1304 &orphan_insert, orphan_dir);
1305 if (status < 0) {
1306 mlog_errno(status);
1307 goto bail;
1308 }
1309 }
1310
1311 /* change the dirent to point to the correct inode */
1312 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1313 old_inode);
1314 if (status < 0) {
1315 mlog_errno(status);
1316 goto bail;
1317 }
1318 new_dir->i_version++;
1319
1320 if (S_ISDIR(new_inode->i_mode))
1321 ocfs2_set_links_count(newfe, 0);
1322 else
1323 ocfs2_add_links_count(newfe, -1);
1324
1325 status = ocfs2_journal_dirty(handle, newfe_bh);
1326 if (status < 0) {
1327 mlog_errno(status);
1328 goto bail;
1329 }
1330 } else {
1331 /* if the name was not found in new_dir, add it now */
1332 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1333 OCFS2_I(old_inode)->ip_blkno,
1334 new_dir_bh, &target_insert);
1335 }
1336
1337 old_inode->i_ctime = CURRENT_TIME;
1338 mark_inode_dirty(old_inode);
1339
1340 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1341 old_inode_bh,
1342 OCFS2_JOURNAL_ACCESS_WRITE);
1343 if (status >= 0) {
1344 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1345
1346 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1347 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1348
1349 status = ocfs2_journal_dirty(handle, old_inode_bh);
1350 if (status < 0)
1351 mlog_errno(status);
1352 } else
1353 mlog_errno(status);
1354
1355 /*
1356 * Now that the name has been added to new_dir, remove the old name.
1357 *
1358 * We don't keep any directory entry context around until now
1359 * because the insert might have changed the type of directory
1360 * we're dealing with.
1361 */
1362 status = ocfs2_find_entry(old_dentry->d_name.name,
1363 old_dentry->d_name.len, old_dir,
1364 &old_entry_lookup);
1365 if (status)
1366 goto bail;
1367
1368 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1369 if (status < 0) {
1370 mlog_errno(status);
1371 goto bail;
1372 }
1373
1374 if (new_inode) {
1375 new_inode->i_nlink--;
1376 new_inode->i_ctime = CURRENT_TIME;
1377 }
1378 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1379
1380 if (update_dot_dot) {
1381 status = ocfs2_update_entry(old_inode, handle,
1382 &old_inode_dot_dot_res, new_dir);
1383 old_dir->i_nlink--;
1384 if (new_inode) {
1385 new_inode->i_nlink--;
1386 } else {
1387 inc_nlink(new_dir);
1388 mark_inode_dirty(new_dir);
1389 }
1390 }
1391 mark_inode_dirty(old_dir);
1392 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1393 if (new_inode) {
1394 mark_inode_dirty(new_inode);
1395 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1396 }
1397
1398 if (old_dir != new_dir) {
1399 /* Keep the same times on both directories.*/
1400 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1401
1402 /*
1403 * This will also pick up the i_nlink change from the
1404 * block above.
1405 */
1406 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1407 }
1408
1409 if (old_dir_nlink != old_dir->i_nlink) {
1410 if (!old_dir_bh) {
1411 mlog(ML_ERROR, "need to change nlink for old dir "
1412 "%llu from %d to %d but bh is NULL!\n",
1413 (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1414 (int)old_dir_nlink, old_dir->i_nlink);
1415 } else {
1416 struct ocfs2_dinode *fe;
1417 status = ocfs2_journal_access_di(handle,
1418 INODE_CACHE(old_dir),
1419 old_dir_bh,
1420 OCFS2_JOURNAL_ACCESS_WRITE);
1421 fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1422 ocfs2_set_links_count(fe, old_dir->i_nlink);
1423 status = ocfs2_journal_dirty(handle, old_dir_bh);
1424 }
1425 }
1426 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1427 status = 0;
1428 bail:
1429 if (rename_lock)
1430 ocfs2_rename_unlock(osb);
1431
1432 if (handle)
1433 ocfs2_commit_trans(osb, handle);
1434
1435 if (parents_locked)
1436 ocfs2_double_unlock(old_dir, new_dir);
1437
1438 if (old_child_locked)
1439 ocfs2_inode_unlock(old_inode, 1);
1440
1441 if (new_child_locked)
1442 ocfs2_inode_unlock(new_inode, 1);
1443
1444 if (orphan_dir) {
1445 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1446 ocfs2_inode_unlock(orphan_dir, 1);
1447 mutex_unlock(&orphan_dir->i_mutex);
1448 iput(orphan_dir);
1449 }
1450
1451 if (new_inode)
1452 sync_mapping_buffers(old_inode->i_mapping);
1453
1454 if (new_inode)
1455 iput(new_inode);
1456
1457 ocfs2_free_dir_lookup_result(&target_lookup_res);
1458 ocfs2_free_dir_lookup_result(&old_entry_lookup);
1459 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1460 ocfs2_free_dir_lookup_result(&orphan_insert);
1461 ocfs2_free_dir_lookup_result(&target_insert);
1462
1463 brelse(newfe_bh);
1464 brelse(old_inode_bh);
1465 brelse(old_dir_bh);
1466 brelse(new_dir_bh);
1467
1468 mlog_exit(status);
1469
1470 return status;
1471 }
1472
1473 /*
1474 * we expect i_size = strlen(symname). Copy symname into the file
1475 * data, including the null terminator.
1476 */
1477 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1478 handle_t *handle,
1479 struct inode *inode,
1480 const char *symname)
1481 {
1482 struct buffer_head **bhs = NULL;
1483 const char *c;
1484 struct super_block *sb = osb->sb;
1485 u64 p_blkno, p_blocks;
1486 int virtual, blocks, status, i, bytes_left;
1487
1488 bytes_left = i_size_read(inode) + 1;
1489 /* we can't trust i_blocks because we're actually going to
1490 * write i_size + 1 bytes. */
1491 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1492
1493 mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n",
1494 (unsigned long long)inode->i_blocks,
1495 i_size_read(inode), blocks);
1496
1497 /* Sanity check -- make sure we're going to fit. */
1498 if (bytes_left >
1499 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1500 status = -EIO;
1501 mlog_errno(status);
1502 goto bail;
1503 }
1504
1505 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1506 if (!bhs) {
1507 status = -ENOMEM;
1508 mlog_errno(status);
1509 goto bail;
1510 }
1511
1512 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1513 NULL);
1514 if (status < 0) {
1515 mlog_errno(status);
1516 goto bail;
1517 }
1518
1519 /* links can never be larger than one cluster so we know this
1520 * is all going to be contiguous, but do a sanity check
1521 * anyway. */
1522 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1523 status = -EIO;
1524 mlog_errno(status);
1525 goto bail;
1526 }
1527
1528 virtual = 0;
1529 while(bytes_left > 0) {
1530 c = &symname[virtual * sb->s_blocksize];
1531
1532 bhs[virtual] = sb_getblk(sb, p_blkno);
1533 if (!bhs[virtual]) {
1534 status = -ENOMEM;
1535 mlog_errno(status);
1536 goto bail;
1537 }
1538 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1539 bhs[virtual]);
1540
1541 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1542 bhs[virtual],
1543 OCFS2_JOURNAL_ACCESS_CREATE);
1544 if (status < 0) {
1545 mlog_errno(status);
1546 goto bail;
1547 }
1548
1549 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1550
1551 memcpy(bhs[virtual]->b_data, c,
1552 (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1553 bytes_left);
1554
1555 status = ocfs2_journal_dirty(handle, bhs[virtual]);
1556 if (status < 0) {
1557 mlog_errno(status);
1558 goto bail;
1559 }
1560
1561 virtual++;
1562 p_blkno++;
1563 bytes_left -= sb->s_blocksize;
1564 }
1565
1566 status = 0;
1567 bail:
1568
1569 if (bhs) {
1570 for(i = 0; i < blocks; i++)
1571 brelse(bhs[i]);
1572 kfree(bhs);
1573 }
1574
1575 mlog_exit(status);
1576 return status;
1577 }
1578
1579 static int ocfs2_symlink(struct inode *dir,
1580 struct dentry *dentry,
1581 const char *symname)
1582 {
1583 int status, l, credits;
1584 u64 newsize;
1585 struct ocfs2_super *osb = NULL;
1586 struct inode *inode = NULL;
1587 struct super_block *sb;
1588 struct buffer_head *new_fe_bh = NULL;
1589 struct buffer_head *parent_fe_bh = NULL;
1590 struct ocfs2_dinode *fe = NULL;
1591 struct ocfs2_dinode *dirfe;
1592 handle_t *handle = NULL;
1593 struct ocfs2_alloc_context *inode_ac = NULL;
1594 struct ocfs2_alloc_context *data_ac = NULL;
1595 struct ocfs2_alloc_context *xattr_ac = NULL;
1596 int want_clusters = 0;
1597 int xattr_credits = 0;
1598 struct ocfs2_security_xattr_info si = {
1599 .enable = 1,
1600 };
1601 int did_quota = 0, did_quota_inode = 0;
1602 struct ocfs2_dir_lookup_result lookup = { NULL, };
1603
1604 mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir,
1605 dentry, symname, dentry->d_name.len, dentry->d_name.name);
1606
1607 dquot_initialize(dir);
1608
1609 sb = dir->i_sb;
1610 osb = OCFS2_SB(sb);
1611
1612 l = strlen(symname) + 1;
1613
1614 credits = ocfs2_calc_symlink_credits(sb);
1615
1616 /* lock the parent directory */
1617 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1618 if (status < 0) {
1619 if (status != -ENOENT)
1620 mlog_errno(status);
1621 return status;
1622 }
1623
1624 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1625 if (!ocfs2_read_links_count(dirfe)) {
1626 /* can't make a file in a deleted directory. */
1627 status = -ENOENT;
1628 goto bail;
1629 }
1630
1631 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1632 dentry->d_name.len);
1633 if (status)
1634 goto bail;
1635
1636 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1637 dentry->d_name.name,
1638 dentry->d_name.len, &lookup);
1639 if (status < 0) {
1640 mlog_errno(status);
1641 goto bail;
1642 }
1643
1644 status = ocfs2_reserve_new_inode(osb, &inode_ac);
1645 if (status < 0) {
1646 if (status != -ENOSPC)
1647 mlog_errno(status);
1648 goto bail;
1649 }
1650
1651 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1652 if (!inode) {
1653 status = -ENOMEM;
1654 mlog_errno(status);
1655 goto bail;
1656 }
1657
1658 /* get security xattr */
1659 status = ocfs2_init_security_get(inode, dir, &si);
1660 if (status) {
1661 if (status == -EOPNOTSUPP)
1662 si.enable = 0;
1663 else {
1664 mlog_errno(status);
1665 goto bail;
1666 }
1667 }
1668
1669 /* calculate meta data/clusters for setting security xattr */
1670 if (si.enable) {
1671 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1672 &xattr_credits, &xattr_ac);
1673 if (status < 0) {
1674 mlog_errno(status);
1675 goto bail;
1676 }
1677 }
1678
1679 /* don't reserve bitmap space for fast symlinks. */
1680 if (l > ocfs2_fast_symlink_chars(sb))
1681 want_clusters += 1;
1682
1683 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1684 if (status < 0) {
1685 if (status != -ENOSPC)
1686 mlog_errno(status);
1687 goto bail;
1688 }
1689
1690 handle = ocfs2_start_trans(osb, credits + xattr_credits);
1691 if (IS_ERR(handle)) {
1692 status = PTR_ERR(handle);
1693 handle = NULL;
1694 mlog_errno(status);
1695 goto bail;
1696 }
1697
1698 status = dquot_alloc_inode(inode);
1699 if (status)
1700 goto bail;
1701 did_quota_inode = 1;
1702
1703 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry,
1704 inode->i_mode, dentry->d_name.len,
1705 dentry->d_name.name);
1706
1707 status = ocfs2_mknod_locked(osb, dir, inode,
1708 0, &new_fe_bh, parent_fe_bh, handle,
1709 inode_ac);
1710 if (status < 0) {
1711 mlog_errno(status);
1712 goto bail;
1713 }
1714
1715 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1716 inode->i_rdev = 0;
1717 newsize = l - 1;
1718 if (l > ocfs2_fast_symlink_chars(sb)) {
1719 u32 offset = 0;
1720
1721 inode->i_op = &ocfs2_symlink_inode_operations;
1722 status = dquot_alloc_space_nodirty(inode,
1723 ocfs2_clusters_to_bytes(osb->sb, 1));
1724 if (status)
1725 goto bail;
1726 did_quota = 1;
1727 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1728 new_fe_bh,
1729 handle, data_ac, NULL,
1730 NULL);
1731 if (status < 0) {
1732 if (status != -ENOSPC && status != -EINTR) {
1733 mlog(ML_ERROR,
1734 "Failed to extend file to %llu\n",
1735 (unsigned long long)newsize);
1736 mlog_errno(status);
1737 status = -ENOSPC;
1738 }
1739 goto bail;
1740 }
1741 i_size_write(inode, newsize);
1742 inode->i_blocks = ocfs2_inode_sector_count(inode);
1743 } else {
1744 inode->i_op = &ocfs2_fast_symlink_inode_operations;
1745 memcpy((char *) fe->id2.i_symlink, symname, l);
1746 i_size_write(inode, newsize);
1747 inode->i_blocks = 0;
1748 }
1749
1750 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1751 if (status < 0) {
1752 mlog_errno(status);
1753 goto bail;
1754 }
1755
1756 if (!ocfs2_inode_is_fast_symlink(inode)) {
1757 status = ocfs2_create_symlink_data(osb, handle, inode,
1758 symname);
1759 if (status < 0) {
1760 mlog_errno(status);
1761 goto bail;
1762 }
1763 }
1764
1765 if (si.enable) {
1766 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1767 xattr_ac, data_ac);
1768 if (status < 0) {
1769 mlog_errno(status);
1770 goto bail;
1771 }
1772 }
1773
1774 status = ocfs2_add_entry(handle, dentry, inode,
1775 le64_to_cpu(fe->i_blkno), parent_fe_bh,
1776 &lookup);
1777 if (status < 0) {
1778 mlog_errno(status);
1779 goto bail;
1780 }
1781
1782 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1783 if (status) {
1784 mlog_errno(status);
1785 goto bail;
1786 }
1787
1788 insert_inode_hash(inode);
1789 dentry->d_op = &ocfs2_dentry_ops;
1790 d_instantiate(dentry, inode);
1791 bail:
1792 if (status < 0 && did_quota)
1793 dquot_free_space_nodirty(inode,
1794 ocfs2_clusters_to_bytes(osb->sb, 1));
1795 if (status < 0 && did_quota_inode)
1796 dquot_free_inode(inode);
1797 if (handle)
1798 ocfs2_commit_trans(osb, handle);
1799
1800 ocfs2_inode_unlock(dir, 1);
1801
1802 brelse(new_fe_bh);
1803 brelse(parent_fe_bh);
1804 kfree(si.name);
1805 kfree(si.value);
1806 ocfs2_free_dir_lookup_result(&lookup);
1807 if (inode_ac)
1808 ocfs2_free_alloc_context(inode_ac);
1809 if (data_ac)
1810 ocfs2_free_alloc_context(data_ac);
1811 if (xattr_ac)
1812 ocfs2_free_alloc_context(xattr_ac);
1813 if ((status < 0) && inode) {
1814 clear_nlink(inode);
1815 iput(inode);
1816 }
1817
1818 mlog_exit(status);
1819
1820 return status;
1821 }
1822
1823 static int ocfs2_blkno_stringify(u64 blkno, char *name)
1824 {
1825 int status, namelen;
1826
1827 mlog_entry_void();
1828
1829 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
1830 (long long)blkno);
1831 if (namelen <= 0) {
1832 if (namelen)
1833 status = namelen;
1834 else
1835 status = -EINVAL;
1836 mlog_errno(status);
1837 goto bail;
1838 }
1839 if (namelen != OCFS2_ORPHAN_NAMELEN) {
1840 status = -EINVAL;
1841 mlog_errno(status);
1842 goto bail;
1843 }
1844
1845 mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name,
1846 namelen);
1847
1848 status = 0;
1849 bail:
1850 mlog_exit(status);
1851 return status;
1852 }
1853
1854 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
1855 struct inode **ret_orphan_dir,
1856 u64 blkno,
1857 char *name,
1858 struct ocfs2_dir_lookup_result *lookup)
1859 {
1860 struct inode *orphan_dir_inode;
1861 struct buffer_head *orphan_dir_bh = NULL;
1862 int status = 0;
1863
1864 status = ocfs2_blkno_stringify(blkno, name);
1865 if (status < 0) {
1866 mlog_errno(status);
1867 return status;
1868 }
1869
1870 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
1871 ORPHAN_DIR_SYSTEM_INODE,
1872 osb->slot_num);
1873 if (!orphan_dir_inode) {
1874 status = -ENOENT;
1875 mlog_errno(status);
1876 return status;
1877 }
1878
1879 mutex_lock(&orphan_dir_inode->i_mutex);
1880
1881 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
1882 if (status < 0) {
1883 mlog_errno(status);
1884 goto leave;
1885 }
1886
1887 status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
1888 orphan_dir_bh, name,
1889 OCFS2_ORPHAN_NAMELEN, lookup);
1890 if (status < 0) {
1891 ocfs2_inode_unlock(orphan_dir_inode, 1);
1892
1893 mlog_errno(status);
1894 goto leave;
1895 }
1896
1897 *ret_orphan_dir = orphan_dir_inode;
1898
1899 leave:
1900 if (status) {
1901 mutex_unlock(&orphan_dir_inode->i_mutex);
1902 iput(orphan_dir_inode);
1903 }
1904
1905 brelse(orphan_dir_bh);
1906
1907 mlog_exit(status);
1908 return status;
1909 }
1910
1911 static int ocfs2_orphan_add(struct ocfs2_super *osb,
1912 handle_t *handle,
1913 struct inode *inode,
1914 struct buffer_head *fe_bh,
1915 char *name,
1916 struct ocfs2_dir_lookup_result *lookup,
1917 struct inode *orphan_dir_inode)
1918 {
1919 struct buffer_head *orphan_dir_bh = NULL;
1920 int status = 0;
1921 struct ocfs2_dinode *orphan_fe;
1922 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
1923
1924 mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);
1925
1926 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
1927 if (status < 0) {
1928 mlog_errno(status);
1929 goto leave;
1930 }
1931
1932 status = ocfs2_journal_access_di(handle,
1933 INODE_CACHE(orphan_dir_inode),
1934 orphan_dir_bh,
1935 OCFS2_JOURNAL_ACCESS_WRITE);
1936 if (status < 0) {
1937 mlog_errno(status);
1938 goto leave;
1939 }
1940
1941 /* we're a cluster, and nlink can change on disk from
1942 * underneath us... */
1943 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
1944 if (S_ISDIR(inode->i_mode))
1945 ocfs2_add_links_count(orphan_fe, 1);
1946 orphan_dir_inode->i_nlink = ocfs2_read_links_count(orphan_fe);
1947
1948 status = ocfs2_journal_dirty(handle, orphan_dir_bh);
1949 if (status < 0) {
1950 mlog_errno(status);
1951 goto leave;
1952 }
1953
1954 status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
1955 OCFS2_ORPHAN_NAMELEN, inode,
1956 OCFS2_I(inode)->ip_blkno,
1957 orphan_dir_bh, lookup);
1958 if (status < 0) {
1959 mlog_errno(status);
1960 goto leave;
1961 }
1962
1963 /*
1964 * We're going to journal the change of i_flags and i_orphaned_slot.
1965 * It's safe anyway, though some callers may duplicate the journaling.
1966 * Journaling within the func just make the logic look more
1967 * straightforward.
1968 */
1969 status = ocfs2_journal_access_di(handle,
1970 INODE_CACHE(inode),
1971 fe_bh,
1972 OCFS2_JOURNAL_ACCESS_WRITE);
1973 if (status < 0) {
1974 mlog_errno(status);
1975 goto leave;
1976 }
1977
1978 le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL);
1979
1980 /* Record which orphan dir our inode now resides
1981 * in. delete_inode will use this to determine which orphan
1982 * dir to lock. */
1983 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
1984
1985 ocfs2_journal_dirty(handle, fe_bh);
1986
1987 mlog(0, "Inode %llu orphaned in slot %d\n",
1988 (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num);
1989
1990 leave:
1991 brelse(orphan_dir_bh);
1992
1993 mlog_exit(status);
1994 return status;
1995 }
1996
1997 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
1998 int ocfs2_orphan_del(struct ocfs2_super *osb,
1999 handle_t *handle,
2000 struct inode *orphan_dir_inode,
2001 struct inode *inode,
2002 struct buffer_head *orphan_dir_bh)
2003 {
2004 char name[OCFS2_ORPHAN_NAMELEN + 1];
2005 struct ocfs2_dinode *orphan_fe;
2006 int status = 0;
2007 struct ocfs2_dir_lookup_result lookup = { NULL, };
2008
2009 mlog_entry_void();
2010
2011 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2012 if (status < 0) {
2013 mlog_errno(status);
2014 goto leave;
2015 }
2016
2017 mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n",
2018 name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2019 OCFS2_ORPHAN_NAMELEN);
2020
2021 /* find it's spot in the orphan directory */
2022 status = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, orphan_dir_inode,
2023 &lookup);
2024 if (status) {
2025 mlog_errno(status);
2026 goto leave;
2027 }
2028
2029 /* remove it from the orphan directory */
2030 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2031 if (status < 0) {
2032 mlog_errno(status);
2033 goto leave;
2034 }
2035
2036 status = ocfs2_journal_access_di(handle,
2037 INODE_CACHE(orphan_dir_inode),
2038 orphan_dir_bh,
2039 OCFS2_JOURNAL_ACCESS_WRITE);
2040 if (status < 0) {
2041 mlog_errno(status);
2042 goto leave;
2043 }
2044
2045 /* do the i_nlink dance! :) */
2046 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2047 if (S_ISDIR(inode->i_mode))
2048 ocfs2_add_links_count(orphan_fe, -1);
2049 orphan_dir_inode->i_nlink = ocfs2_read_links_count(orphan_fe);
2050
2051 status = ocfs2_journal_dirty(handle, orphan_dir_bh);
2052 if (status < 0) {
2053 mlog_errno(status);
2054 goto leave;
2055 }
2056
2057 leave:
2058 ocfs2_free_dir_lookup_result(&lookup);
2059
2060 mlog_exit(status);
2061 return status;
2062 }
2063
2064 int ocfs2_create_inode_in_orphan(struct inode *dir,
2065 int mode,
2066 struct inode **new_inode)
2067 {
2068 int status, did_quota_inode = 0;
2069 struct inode *inode = NULL;
2070 struct inode *orphan_dir = NULL;
2071 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2072 struct ocfs2_dinode *di = NULL;
2073 handle_t *handle = NULL;
2074 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2075 struct buffer_head *parent_di_bh = NULL;
2076 struct buffer_head *new_di_bh = NULL;
2077 struct ocfs2_alloc_context *inode_ac = NULL;
2078 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2079
2080 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2081 if (status < 0) {
2082 if (status != -ENOENT)
2083 mlog_errno(status);
2084 return status;
2085 }
2086
2087 /*
2088 * We give the orphan dir the root blkno to fake an orphan name,
2089 * and allocate enough space for our insertion.
2090 */
2091 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
2092 osb->root_blkno,
2093 orphan_name, &orphan_insert);
2094 if (status < 0) {
2095 mlog_errno(status);
2096 goto leave;
2097 }
2098
2099 /* reserve an inode spot */
2100 status = ocfs2_reserve_new_inode(osb, &inode_ac);
2101 if (status < 0) {
2102 if (status != -ENOSPC)
2103 mlog_errno(status);
2104 goto leave;
2105 }
2106
2107 inode = ocfs2_get_init_inode(dir, mode);
2108 if (!inode) {
2109 status = -ENOMEM;
2110 mlog_errno(status);
2111 goto leave;
2112 }
2113
2114 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2115 if (IS_ERR(handle)) {
2116 status = PTR_ERR(handle);
2117 handle = NULL;
2118 mlog_errno(status);
2119 goto leave;
2120 }
2121
2122 status = dquot_alloc_inode(inode);
2123 if (status)
2124 goto leave;
2125 did_quota_inode = 1;
2126
2127 inode->i_nlink = 0;
2128 /* do the real work now. */
2129 status = ocfs2_mknod_locked(osb, dir, inode,
2130 0, &new_di_bh, parent_di_bh, handle,
2131 inode_ac);
2132 if (status < 0) {
2133 mlog_errno(status);
2134 goto leave;
2135 }
2136
2137 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, orphan_name);
2138 if (status < 0) {
2139 mlog_errno(status);
2140 goto leave;
2141 }
2142
2143 di = (struct ocfs2_dinode *)new_di_bh->b_data;
2144 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2145 &orphan_insert, orphan_dir);
2146 if (status < 0) {
2147 mlog_errno(status);
2148 goto leave;
2149 }
2150
2151 /* get open lock so that only nodes can't remove it from orphan dir. */
2152 status = ocfs2_open_lock(inode);
2153 if (status < 0)
2154 mlog_errno(status);
2155
2156 insert_inode_hash(inode);
2157 leave:
2158 if (status < 0 && did_quota_inode)
2159 dquot_free_inode(inode);
2160 if (handle)
2161 ocfs2_commit_trans(osb, handle);
2162
2163 if (orphan_dir) {
2164 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2165 ocfs2_inode_unlock(orphan_dir, 1);
2166 mutex_unlock(&orphan_dir->i_mutex);
2167 iput(orphan_dir);
2168 }
2169
2170 if (status == -ENOSPC)
2171 mlog(0, "Disk is full\n");
2172
2173 if ((status < 0) && inode) {
2174 clear_nlink(inode);
2175 iput(inode);
2176 }
2177
2178 if (inode_ac)
2179 ocfs2_free_alloc_context(inode_ac);
2180
2181 brelse(new_di_bh);
2182
2183 if (!status)
2184 *new_inode = inode;
2185
2186 ocfs2_free_dir_lookup_result(&orphan_insert);
2187
2188 ocfs2_inode_unlock(dir, 1);
2189 brelse(parent_di_bh);
2190 return status;
2191 }
2192
2193 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2194 struct inode *inode,
2195 struct dentry *dentry)
2196 {
2197 int status = 0;
2198 struct buffer_head *parent_di_bh = NULL;
2199 handle_t *handle = NULL;
2200 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2201 struct ocfs2_dinode *dir_di, *di;
2202 struct inode *orphan_dir_inode = NULL;
2203 struct buffer_head *orphan_dir_bh = NULL;
2204 struct buffer_head *di_bh = NULL;
2205 struct ocfs2_dir_lookup_result lookup = { NULL, };
2206
2207 mlog_entry("(0x%p, 0x%p, %.*s')\n", dir, dentry,
2208 dentry->d_name.len, dentry->d_name.name);
2209
2210 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2211 if (status < 0) {
2212 if (status != -ENOENT)
2213 mlog_errno(status);
2214 return status;
2215 }
2216
2217 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2218 if (!dir_di->i_links_count) {
2219 /* can't make a file in a deleted directory. */
2220 status = -ENOENT;
2221 goto leave;
2222 }
2223
2224 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2225 dentry->d_name.len);
2226 if (status)
2227 goto leave;
2228
2229 /* get a spot inside the dir. */
2230 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2231 dentry->d_name.name,
2232 dentry->d_name.len, &lookup);
2233 if (status < 0) {
2234 mlog_errno(status);
2235 goto leave;
2236 }
2237
2238 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2239 ORPHAN_DIR_SYSTEM_INODE,
2240 osb->slot_num);
2241 if (!orphan_dir_inode) {
2242 status = -EEXIST;
2243 mlog_errno(status);
2244 goto leave;
2245 }
2246
2247 mutex_lock(&orphan_dir_inode->i_mutex);
2248
2249 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2250 if (status < 0) {
2251 mlog_errno(status);
2252 mutex_unlock(&orphan_dir_inode->i_mutex);
2253 iput(orphan_dir_inode);
2254 goto leave;
2255 }
2256
2257 status = ocfs2_read_inode_block(inode, &di_bh);
2258 if (status < 0) {
2259 mlog_errno(status);
2260 goto orphan_unlock;
2261 }
2262
2263 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2264 if (IS_ERR(handle)) {
2265 status = PTR_ERR(handle);
2266 handle = NULL;
2267 mlog_errno(status);
2268 goto orphan_unlock;
2269 }
2270
2271 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2272 di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2273 if (status < 0) {
2274 mlog_errno(status);
2275 goto out_commit;
2276 }
2277
2278 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2279 orphan_dir_bh);
2280 if (status < 0) {
2281 mlog_errno(status);
2282 goto out_commit;
2283 }
2284
2285 di = (struct ocfs2_dinode *)di_bh->b_data;
2286 le32_add_cpu(&di->i_flags, -OCFS2_ORPHANED_FL);
2287 di->i_orphaned_slot = 0;
2288 inode->i_nlink = 1;
2289 ocfs2_set_links_count(di, inode->i_nlink);
2290 ocfs2_journal_dirty(handle, di_bh);
2291
2292 status = ocfs2_add_entry(handle, dentry, inode,
2293 OCFS2_I(inode)->ip_blkno, parent_di_bh,
2294 &lookup);
2295 if (status < 0) {
2296 mlog_errno(status);
2297 goto out_commit;
2298 }
2299
2300 status = ocfs2_dentry_attach_lock(dentry, inode,
2301 OCFS2_I(dir)->ip_blkno);
2302 if (status) {
2303 mlog_errno(status);
2304 goto out_commit;
2305 }
2306
2307 dentry->d_op = &ocfs2_dentry_ops;
2308 d_instantiate(dentry, inode);
2309 status = 0;
2310 out_commit:
2311 ocfs2_commit_trans(osb, handle);
2312 orphan_unlock:
2313 ocfs2_inode_unlock(orphan_dir_inode, 1);
2314 mutex_unlock(&orphan_dir_inode->i_mutex);
2315 iput(orphan_dir_inode);
2316 leave:
2317
2318 ocfs2_inode_unlock(dir, 1);
2319
2320 brelse(di_bh);
2321 brelse(parent_di_bh);
2322 brelse(orphan_dir_bh);
2323
2324 ocfs2_free_dir_lookup_result(&lookup);
2325
2326 mlog_exit(status);
2327
2328 return status;
2329 }
2330
2331 const struct inode_operations ocfs2_dir_iops = {
2332 .create = ocfs2_create,
2333 .lookup = ocfs2_lookup,
2334 .link = ocfs2_link,
2335 .unlink = ocfs2_unlink,
2336 .rmdir = ocfs2_unlink,
2337 .symlink = ocfs2_symlink,
2338 .mkdir = ocfs2_mkdir,
2339 .mknod = ocfs2_mknod,
2340 .rename = ocfs2_rename,
2341 .setattr = ocfs2_setattr,
2342 .getattr = ocfs2_getattr,
2343 .permission = ocfs2_permission,
2344 .setxattr = generic_setxattr,
2345 .getxattr = generic_getxattr,
2346 .listxattr = ocfs2_listxattr,
2347 .removexattr = generic_removexattr,
2348 .fiemap = ocfs2_fiemap,
2349 };