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btrfs: cleanup duplicate bio allocating functions
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / ocfs2 / namei.c
bloba00dda2e4f16698e5c7d8e0946ba1f09506651c6
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_init_owner(inode, dir, mode);
208 dquot_initialize(inode);
209 return inode;
210 }
211
212 static int ocfs2_mknod(struct inode *dir,
213 struct dentry *dentry,
214 int mode,
215 dev_t dev)
216 {
217 int status = 0;
218 struct buffer_head *parent_fe_bh = NULL;
219 handle_t *handle = NULL;
220 struct ocfs2_super *osb;
221 struct ocfs2_dinode *dirfe;
222 struct buffer_head *new_fe_bh = NULL;
223 struct inode *inode = NULL;
224 struct ocfs2_alloc_context *inode_ac = NULL;
225 struct ocfs2_alloc_context *data_ac = NULL;
226 struct ocfs2_alloc_context *meta_ac = NULL;
227 int want_clusters = 0;
228 int want_meta = 0;
229 int xattr_credits = 0;
230 struct ocfs2_security_xattr_info si = {
231 .enable = 1,
232 };
233 int did_quota_inode = 0;
234 struct ocfs2_dir_lookup_result lookup = { NULL, };
235 sigset_t oldset;
236 int did_block_signals = 0;
237
238 mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode,
239 (unsigned long)dev, dentry->d_name.len,
240 dentry->d_name.name);
241
242 dquot_initialize(dir);
243
244 /* get our super block */
245 osb = OCFS2_SB(dir->i_sb);
246
247 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
248 if (status < 0) {
249 if (status != -ENOENT)
250 mlog_errno(status);
251 return status;
252 }
253
254 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
255 status = -EMLINK;
256 goto leave;
257 }
258
259 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
260 if (!ocfs2_read_links_count(dirfe)) {
261 /* can't make a file in a deleted directory. */
262 status = -ENOENT;
263 goto leave;
264 }
265
266 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
267 dentry->d_name.len);
268 if (status)
269 goto leave;
270
271 /* get a spot inside the dir. */
272 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
273 dentry->d_name.name,
274 dentry->d_name.len, &lookup);
275 if (status < 0) {
276 mlog_errno(status);
277 goto leave;
278 }
279
280 /* reserve an inode spot */
281 status = ocfs2_reserve_new_inode(osb, &inode_ac);
282 if (status < 0) {
283 if (status != -ENOSPC)
284 mlog_errno(status);
285 goto leave;
286 }
287
288 inode = ocfs2_get_init_inode(dir, mode);
289 if (!inode) {
290 status = -ENOMEM;
291 mlog_errno(status);
292 goto leave;
293 }
294
295 /* get security xattr */
296 status = ocfs2_init_security_get(inode, dir, &si);
297 if (status) {
298 if (status == -EOPNOTSUPP)
299 si.enable = 0;
300 else {
301 mlog_errno(status);
302 goto leave;
303 }
304 }
305
306 /* calculate meta data/clusters for setting security and acl xattr */
307 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
308 &si, &want_clusters,
309 &xattr_credits, &want_meta);
310 if (status < 0) {
311 mlog_errno(status);
312 goto leave;
313 }
314
315 /* Reserve a cluster if creating an extent based directory. */
316 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
317 want_clusters += 1;
318
319 /* Dir indexing requires extra space as well */
320 if (ocfs2_supports_indexed_dirs(osb))
321 want_meta++;
322 }
323
324 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
325 if (status < 0) {
326 if (status != -ENOSPC)
327 mlog_errno(status);
328 goto leave;
329 }
330
331 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
332 if (status < 0) {
333 if (status != -ENOSPC)
334 mlog_errno(status);
335 goto leave;
336 }
337
338 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
339 S_ISDIR(mode),
340 xattr_credits));
341 if (IS_ERR(handle)) {
342 status = PTR_ERR(handle);
343 handle = NULL;
344 mlog_errno(status);
345 goto leave;
346 }
347
348 /* Starting to change things, restart is no longer possible. */
349 ocfs2_block_signals(&oldset);
350 did_block_signals = 1;
351
352 status = dquot_alloc_inode(inode);
353 if (status)
354 goto leave;
355 did_quota_inode = 1;
356
357 mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry,
358 inode->i_mode, (unsigned long)dev, dentry->d_name.len,
359 dentry->d_name.name);
360
361 /* do the real work now. */
362 status = ocfs2_mknod_locked(osb, dir, inode, dev,
363 &new_fe_bh, parent_fe_bh, handle,
364 inode_ac);
365 if (status < 0) {
366 mlog_errno(status);
367 goto leave;
368 }
369
370 if (S_ISDIR(mode)) {
371 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
372 new_fe_bh, data_ac, meta_ac);
373 if (status < 0) {
374 mlog_errno(status);
375 goto leave;
376 }
377
378 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
379 parent_fe_bh,
380 OCFS2_JOURNAL_ACCESS_WRITE);
381 if (status < 0) {
382 mlog_errno(status);
383 goto leave;
384 }
385 ocfs2_add_links_count(dirfe, 1);
386 ocfs2_journal_dirty(handle, parent_fe_bh);
387 inc_nlink(dir);
388 }
389
390 status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
391 meta_ac, data_ac);
392 if (status < 0) {
393 mlog_errno(status);
394 goto leave;
395 }
396
397 if (si.enable) {
398 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
399 meta_ac, data_ac);
400 if (status < 0) {
401 mlog_errno(status);
402 goto leave;
403 }
404 }
405
406 /*
407 * Do this before adding the entry to the directory. We add
408 * also set d_op after success so that ->d_iput() will cleanup
409 * the dentry lock even if ocfs2_add_entry() fails below.
410 */
411 status = ocfs2_dentry_attach_lock(dentry, inode,
412 OCFS2_I(dir)->ip_blkno);
413 if (status) {
414 mlog_errno(status);
415 goto leave;
416 }
417 dentry->d_op = &ocfs2_dentry_ops;
418
419 status = ocfs2_add_entry(handle, dentry, inode,
420 OCFS2_I(inode)->ip_blkno, parent_fe_bh,
421 &lookup);
422 if (status < 0) {
423 mlog_errno(status);
424 goto leave;
425 }
426
427 insert_inode_hash(inode);
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 if (did_block_signals)
438 ocfs2_unblock_signals(&oldset);
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 (inode_ac)
451 ocfs2_free_alloc_context(inode_ac);
452
453 if (data_ac)
454 ocfs2_free_alloc_context(data_ac);
455
456 if (meta_ac)
457 ocfs2_free_alloc_context(meta_ac);
458
459 /*
460 * We should call iput after the i_mutex of the bitmap been
461 * unlocked in ocfs2_free_alloc_context, or the
462 * ocfs2_delete_inode will mutex_lock again.
463 */
464 if ((status < 0) && inode) {
465 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
466 clear_nlink(inode);
467 iput(inode);
468 }
469
470 mlog_exit(status);
471
472 return status;
473 }
474
475 static int __ocfs2_mknod_locked(struct inode *dir,
476 struct inode *inode,
477 dev_t dev,
478 struct buffer_head **new_fe_bh,
479 struct buffer_head *parent_fe_bh,
480 handle_t *handle,
481 struct ocfs2_alloc_context *inode_ac,
482 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
483 {
484 int status = 0;
485 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
486 struct ocfs2_dinode *fe = NULL;
487 struct ocfs2_extent_list *fel;
488 u16 feat;
489
490 *new_fe_bh = NULL;
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_loc = cpu_to_le64(suballoc_loc);
524 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
525 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
526 fe->i_uid = cpu_to_le32(inode->i_uid);
527 fe->i_gid = cpu_to_le32(inode->i_gid);
528 fe->i_mode = cpu_to_le16(inode->i_mode);
529 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
530 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
531
532 ocfs2_set_links_count(fe, inode->i_nlink);
533
534 fe->i_last_eb_blk = 0;
535 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
536 le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL);
537 fe->i_atime = fe->i_ctime = fe->i_mtime =
538 cpu_to_le64(CURRENT_TIME.tv_sec);
539 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
540 cpu_to_le32(CURRENT_TIME.tv_nsec);
541 fe->i_dtime = 0;
542
543 /*
544 * If supported, directories start with inline data. If inline
545 * isn't supported, but indexing is, we start them as indexed.
546 */
547 feat = le16_to_cpu(fe->i_dyn_features);
548 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
549 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
550
551 fe->id2.i_data.id_count = cpu_to_le16(
552 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
553 } else {
554 fel = &fe->id2.i_list;
555 fel->l_tree_depth = 0;
556 fel->l_next_free_rec = 0;
557 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
558 }
559
560 ocfs2_journal_dirty(handle, *new_fe_bh);
561
562 ocfs2_populate_inode(inode, fe, 1);
563 ocfs2_ci_set_new(osb, INODE_CACHE(inode));
564 if (!ocfs2_mount_local(osb)) {
565 status = ocfs2_create_new_inode_locks(inode);
566 if (status < 0)
567 mlog_errno(status);
568 }
569
570 status = 0; /* error in ocfs2_create_new_inode_locks is not
571 * critical */
572
573 leave:
574 if (status < 0) {
575 if (*new_fe_bh) {
576 brelse(*new_fe_bh);
577 *new_fe_bh = NULL;
578 }
579 }
580
581 mlog_exit(status);
582 return status;
583 }
584
585 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
586 struct inode *dir,
587 struct inode *inode,
588 dev_t dev,
589 struct buffer_head **new_fe_bh,
590 struct buffer_head *parent_fe_bh,
591 handle_t *handle,
592 struct ocfs2_alloc_context *inode_ac)
593 {
594 int status = 0;
595 u64 suballoc_loc, fe_blkno = 0;
596 u16 suballoc_bit;
597
598 *new_fe_bh = NULL;
599
600 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
601 inode_ac, &suballoc_loc,
602 &suballoc_bit, &fe_blkno);
603 if (status < 0) {
604 mlog_errno(status);
605 return status;
606 }
607
608 return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
609 parent_fe_bh, handle, inode_ac,
610 fe_blkno, suballoc_loc, suballoc_bit);
611 }
612
613 static int ocfs2_mkdir(struct inode *dir,
614 struct dentry *dentry,
615 int mode)
616 {
617 int ret;
618
619 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
620 dentry->d_name.len, dentry->d_name.name);
621 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
622 mlog_exit(ret);
623
624 return ret;
625 }
626
627 static int ocfs2_create(struct inode *dir,
628 struct dentry *dentry,
629 int mode,
630 struct nameidata *nd)
631 {
632 int ret;
633
634 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
635 dentry->d_name.len, dentry->d_name.name);
636 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
637 mlog_exit(ret);
638
639 return ret;
640 }
641
642 static int ocfs2_link(struct dentry *old_dentry,
643 struct inode *dir,
644 struct dentry *dentry)
645 {
646 handle_t *handle;
647 struct inode *inode = old_dentry->d_inode;
648 int err;
649 struct buffer_head *fe_bh = NULL;
650 struct buffer_head *parent_fe_bh = NULL;
651 struct ocfs2_dinode *fe = NULL;
652 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
653 struct ocfs2_dir_lookup_result lookup = { NULL, };
654 sigset_t oldset;
655
656 mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino,
657 old_dentry->d_name.len, old_dentry->d_name.name,
658 dentry->d_name.len, dentry->d_name.name);
659
660 if (S_ISDIR(inode->i_mode))
661 return -EPERM;
662
663 dquot_initialize(dir);
664
665 err = ocfs2_inode_lock_nested(dir, &parent_fe_bh, 1, OI_LS_PARENT);
666 if (err < 0) {
667 if (err != -ENOENT)
668 mlog_errno(err);
669 return err;
670 }
671
672 if (!dir->i_nlink) {
673 err = -ENOENT;
674 goto out;
675 }
676
677 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
678 dentry->d_name.len);
679 if (err)
680 goto out;
681
682 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
683 dentry->d_name.name,
684 dentry->d_name.len, &lookup);
685 if (err < 0) {
686 mlog_errno(err);
687 goto out;
688 }
689
690 err = ocfs2_inode_lock(inode, &fe_bh, 1);
691 if (err < 0) {
692 if (err != -ENOENT)
693 mlog_errno(err);
694 goto out;
695 }
696
697 fe = (struct ocfs2_dinode *) fe_bh->b_data;
698 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
699 err = -EMLINK;
700 goto out_unlock_inode;
701 }
702
703 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
704 if (IS_ERR(handle)) {
705 err = PTR_ERR(handle);
706 handle = NULL;
707 mlog_errno(err);
708 goto out_unlock_inode;
709 }
710
711 /* Starting to change things, restart is no longer possible. */
712 ocfs2_block_signals(&oldset);
713
714 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
715 OCFS2_JOURNAL_ACCESS_WRITE);
716 if (err < 0) {
717 mlog_errno(err);
718 goto out_commit;
719 }
720
721 inc_nlink(inode);
722 inode->i_ctime = CURRENT_TIME;
723 ocfs2_set_links_count(fe, inode->i_nlink);
724 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
725 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
726 ocfs2_journal_dirty(handle, fe_bh);
727
728 err = ocfs2_add_entry(handle, dentry, inode,
729 OCFS2_I(inode)->ip_blkno,
730 parent_fe_bh, &lookup);
731 if (err) {
732 ocfs2_add_links_count(fe, -1);
733 drop_nlink(inode);
734 mlog_errno(err);
735 goto out_commit;
736 }
737
738 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
739 if (err) {
740 mlog_errno(err);
741 goto out_commit;
742 }
743
744 atomic_inc(&inode->i_count);
745 dentry->d_op = &ocfs2_dentry_ops;
746 d_instantiate(dentry, inode);
747
748 out_commit:
749 ocfs2_commit_trans(osb, handle);
750 ocfs2_unblock_signals(&oldset);
751 out_unlock_inode:
752 ocfs2_inode_unlock(inode, 1);
753
754 out:
755 ocfs2_inode_unlock(dir, 1);
756
757 brelse(fe_bh);
758 brelse(parent_fe_bh);
759
760 ocfs2_free_dir_lookup_result(&lookup);
761
762 mlog_exit(err);
763
764 return err;
765 }
766
767 /*
768 * Takes and drops an exclusive lock on the given dentry. This will
769 * force other nodes to drop it.
770 */
771 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
772 {
773 int ret;
774
775 ret = ocfs2_dentry_lock(dentry, 1);
776 if (ret)
777 mlog_errno(ret);
778 else
779 ocfs2_dentry_unlock(dentry, 1);
780
781 return ret;
782 }
783
784 static inline int inode_is_unlinkable(struct inode *inode)
785 {
786 if (S_ISDIR(inode->i_mode)) {
787 if (inode->i_nlink == 2)
788 return 1;
789 return 0;
790 }
791
792 if (inode->i_nlink == 1)
793 return 1;
794 return 0;
795 }
796
797 static int ocfs2_unlink(struct inode *dir,
798 struct dentry *dentry)
799 {
800 int status;
801 int child_locked = 0;
802 struct inode *inode = dentry->d_inode;
803 struct inode *orphan_dir = NULL;
804 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
805 u64 blkno;
806 struct ocfs2_dinode *fe = NULL;
807 struct buffer_head *fe_bh = NULL;
808 struct buffer_head *parent_node_bh = NULL;
809 handle_t *handle = NULL;
810 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
811 struct ocfs2_dir_lookup_result lookup = { NULL, };
812 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
813
814 mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
815 dentry->d_name.len, dentry->d_name.name);
816
817 dquot_initialize(dir);
818
819 BUG_ON(dentry->d_parent->d_inode != dir);
820
821 mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno);
822
823 if (inode == osb->root_inode) {
824 mlog(0, "Cannot delete the root directory\n");
825 return -EPERM;
826 }
827
828 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
829 OI_LS_PARENT);
830 if (status < 0) {
831 if (status != -ENOENT)
832 mlog_errno(status);
833 return status;
834 }
835
836 status = ocfs2_find_files_on_disk(dentry->d_name.name,
837 dentry->d_name.len, &blkno, dir,
838 &lookup);
839 if (status < 0) {
840 if (status != -ENOENT)
841 mlog_errno(status);
842 goto leave;
843 }
844
845 if (OCFS2_I(inode)->ip_blkno != blkno) {
846 status = -ENOENT;
847
848 mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n",
849 (unsigned long long)OCFS2_I(inode)->ip_blkno,
850 (unsigned long long)blkno, OCFS2_I(inode)->ip_flags);
851 goto leave;
852 }
853
854 status = ocfs2_inode_lock(inode, &fe_bh, 1);
855 if (status < 0) {
856 if (status != -ENOENT)
857 mlog_errno(status);
858 goto leave;
859 }
860 child_locked = 1;
861
862 if (S_ISDIR(inode->i_mode)) {
863 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
864 status = -ENOTEMPTY;
865 goto leave;
866 }
867 }
868
869 status = ocfs2_remote_dentry_delete(dentry);
870 if (status < 0) {
871 /* This remote delete should succeed under all normal
872 * circumstances. */
873 mlog_errno(status);
874 goto leave;
875 }
876
877 if (inode_is_unlinkable(inode)) {
878 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
879 OCFS2_I(inode)->ip_blkno,
880 orphan_name, &orphan_insert);
881 if (status < 0) {
882 mlog_errno(status);
883 goto leave;
884 }
885 }
886
887 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
888 if (IS_ERR(handle)) {
889 status = PTR_ERR(handle);
890 handle = NULL;
891 mlog_errno(status);
892 goto leave;
893 }
894
895 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
896 OCFS2_JOURNAL_ACCESS_WRITE);
897 if (status < 0) {
898 mlog_errno(status);
899 goto leave;
900 }
901
902 fe = (struct ocfs2_dinode *) fe_bh->b_data;
903
904 if (inode_is_unlinkable(inode)) {
905 status = ocfs2_orphan_add(osb, handle, inode, fe_bh, orphan_name,
906 &orphan_insert, orphan_dir);
907 if (status < 0) {
908 mlog_errno(status);
909 goto leave;
910 }
911 }
912
913 /* delete the name from the parent dir */
914 status = ocfs2_delete_entry(handle, dir, &lookup);
915 if (status < 0) {
916 mlog_errno(status);
917 goto leave;
918 }
919
920 if (S_ISDIR(inode->i_mode))
921 drop_nlink(inode);
922 drop_nlink(inode);
923 ocfs2_set_links_count(fe, inode->i_nlink);
924 ocfs2_journal_dirty(handle, fe_bh);
925
926 dir->i_ctime = dir->i_mtime = CURRENT_TIME;
927 if (S_ISDIR(inode->i_mode))
928 drop_nlink(dir);
929
930 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
931 if (status < 0) {
932 mlog_errno(status);
933 if (S_ISDIR(inode->i_mode))
934 inc_nlink(dir);
935 }
936
937 leave:
938 if (handle)
939 ocfs2_commit_trans(osb, handle);
940
941 if (child_locked)
942 ocfs2_inode_unlock(inode, 1);
943
944 ocfs2_inode_unlock(dir, 1);
945
946 if (orphan_dir) {
947 /* This was locked for us in ocfs2_prepare_orphan_dir() */
948 ocfs2_inode_unlock(orphan_dir, 1);
949 mutex_unlock(&orphan_dir->i_mutex);
950 iput(orphan_dir);
951 }
952
953 brelse(fe_bh);
954 brelse(parent_node_bh);
955
956 ocfs2_free_dir_lookup_result(&orphan_insert);
957 ocfs2_free_dir_lookup_result(&lookup);
958
959 mlog_exit(status);
960
961 return status;
962 }
963
964 /*
965 * The only place this should be used is rename!
966 * if they have the same id, then the 1st one is the only one locked.
967 */
968 static int ocfs2_double_lock(struct ocfs2_super *osb,
969 struct buffer_head **bh1,
970 struct inode *inode1,
971 struct buffer_head **bh2,
972 struct inode *inode2)
973 {
974 int status;
975 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
976 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
977 struct buffer_head **tmpbh;
978 struct inode *tmpinode;
979
980 mlog_entry("(inode1 = %llu, inode2 = %llu)\n",
981 (unsigned long long)oi1->ip_blkno,
982 (unsigned long long)oi2->ip_blkno);
983
984 if (*bh1)
985 *bh1 = NULL;
986 if (*bh2)
987 *bh2 = NULL;
988
989 /* we always want to lock the one with the lower lockid first. */
990 if (oi1->ip_blkno != oi2->ip_blkno) {
991 if (oi1->ip_blkno < oi2->ip_blkno) {
992 /* switch id1 and id2 around */
993 mlog(0, "switching them around...\n");
994 tmpbh = bh2;
995 bh2 = bh1;
996 bh1 = tmpbh;
997
998 tmpinode = inode2;
999 inode2 = inode1;
1000 inode1 = tmpinode;
1001 }
1002 /* lock id2 */
1003 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1004 OI_LS_RENAME1);
1005 if (status < 0) {
1006 if (status != -ENOENT)
1007 mlog_errno(status);
1008 goto bail;
1009 }
1010 }
1011
1012 /* lock id1 */
1013 status = ocfs2_inode_lock_nested(inode1, bh1, 1, OI_LS_RENAME2);
1014 if (status < 0) {
1015 /*
1016 * An error return must mean that no cluster locks
1017 * were held on function exit.
1018 */
1019 if (oi1->ip_blkno != oi2->ip_blkno)
1020 ocfs2_inode_unlock(inode2, 1);
1021
1022 if (status != -ENOENT)
1023 mlog_errno(status);
1024 }
1025
1026 bail:
1027 mlog_exit(status);
1028 return status;
1029 }
1030
1031 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1032 {
1033 ocfs2_inode_unlock(inode1, 1);
1034
1035 if (inode1 != inode2)
1036 ocfs2_inode_unlock(inode2, 1);
1037 }
1038
1039 static int ocfs2_rename(struct inode *old_dir,
1040 struct dentry *old_dentry,
1041 struct inode *new_dir,
1042 struct dentry *new_dentry)
1043 {
1044 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1045 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1046 struct inode *old_inode = old_dentry->d_inode;
1047 struct inode *new_inode = new_dentry->d_inode;
1048 struct inode *orphan_dir = NULL;
1049 struct ocfs2_dinode *newfe = NULL;
1050 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1051 struct buffer_head *newfe_bh = NULL;
1052 struct buffer_head *old_inode_bh = NULL;
1053 struct ocfs2_super *osb = NULL;
1054 u64 newfe_blkno, old_de_ino;
1055 handle_t *handle = NULL;
1056 struct buffer_head *old_dir_bh = NULL;
1057 struct buffer_head *new_dir_bh = NULL;
1058 nlink_t old_dir_nlink = old_dir->i_nlink;
1059 struct ocfs2_dinode *old_di;
1060 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1061 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1062 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1063 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1064 struct ocfs2_dir_lookup_result target_insert = { NULL, };
1065
1066 /* At some point it might be nice to break this function up a
1067 * bit. */
1068
1069 mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n",
1070 old_dir, old_dentry, new_dir, new_dentry,
1071 old_dentry->d_name.len, old_dentry->d_name.name,
1072 new_dentry->d_name.len, new_dentry->d_name.name);
1073
1074 dquot_initialize(old_dir);
1075 dquot_initialize(new_dir);
1076
1077 osb = OCFS2_SB(old_dir->i_sb);
1078
1079 if (new_inode) {
1080 if (!igrab(new_inode))
1081 BUG();
1082 }
1083
1084 /* Assume a directory hierarchy thusly:
1085 * a/b/c
1086 * a/d
1087 * a,b,c, and d are all directories.
1088 *
1089 * from cwd of 'a' on both nodes:
1090 * node1: mv b/c d
1091 * node2: mv d b/c
1092 *
1093 * And that's why, just like the VFS, we need a file system
1094 * rename lock. */
1095 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1096 status = ocfs2_rename_lock(osb);
1097 if (status < 0) {
1098 mlog_errno(status);
1099 goto bail;
1100 }
1101 rename_lock = 1;
1102 }
1103
1104 /* if old and new are the same, this'll just do one lock. */
1105 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1106 &new_dir_bh, new_dir);
1107 if (status < 0) {
1108 mlog_errno(status);
1109 goto bail;
1110 }
1111 parents_locked = 1;
1112
1113 /* make sure both dirs have bhs
1114 * get an extra ref on old_dir_bh if old==new */
1115 if (!new_dir_bh) {
1116 if (old_dir_bh) {
1117 new_dir_bh = old_dir_bh;
1118 get_bh(new_dir_bh);
1119 } else {
1120 mlog(ML_ERROR, "no old_dir_bh!\n");
1121 status = -EIO;
1122 goto bail;
1123 }
1124 }
1125
1126 /*
1127 * Aside from allowing a meta data update, the locking here
1128 * also ensures that the downconvert thread on other nodes
1129 * won't have to concurrently downconvert the inode and the
1130 * dentry locks.
1131 */
1132 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1133 OI_LS_PARENT);
1134 if (status < 0) {
1135 if (status != -ENOENT)
1136 mlog_errno(status);
1137 goto bail;
1138 }
1139 old_child_locked = 1;
1140
1141 status = ocfs2_remote_dentry_delete(old_dentry);
1142 if (status < 0) {
1143 mlog_errno(status);
1144 goto bail;
1145 }
1146
1147 if (S_ISDIR(old_inode->i_mode)) {
1148 u64 old_inode_parent;
1149
1150 update_dot_dot = 1;
1151 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1152 old_inode,
1153 &old_inode_dot_dot_res);
1154 if (status) {
1155 status = -EIO;
1156 goto bail;
1157 }
1158
1159 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1160 status = -EIO;
1161 goto bail;
1162 }
1163
1164 if (!new_inode && new_dir != old_dir &&
1165 new_dir->i_nlink >= ocfs2_link_max(osb)) {
1166 status = -EMLINK;
1167 goto bail;
1168 }
1169 }
1170
1171 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1172 old_dentry->d_name.len,
1173 &old_de_ino);
1174 if (status) {
1175 status = -ENOENT;
1176 goto bail;
1177 }
1178
1179 /*
1180 * Check for inode number is _not_ due to possible IO errors.
1181 * We might rmdir the source, keep it as pwd of some process
1182 * and merrily kill the link to whatever was created under the
1183 * same name. Goodbye sticky bit ;-<
1184 */
1185 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1186 status = -ENOENT;
1187 goto bail;
1188 }
1189
1190 /* check if the target already exists (in which case we need
1191 * to delete it */
1192 status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1193 new_dentry->d_name.len,
1194 &newfe_blkno, new_dir,
1195 &target_lookup_res);
1196 /* The only error we allow here is -ENOENT because the new
1197 * file not existing is perfectly valid. */
1198 if ((status < 0) && (status != -ENOENT)) {
1199 /* If we cannot find the file specified we should just */
1200 /* return the error... */
1201 mlog_errno(status);
1202 goto bail;
1203 }
1204 if (status == 0)
1205 target_exists = 1;
1206
1207 if (!target_exists && new_inode) {
1208 /*
1209 * Target was unlinked by another node while we were
1210 * waiting to get to ocfs2_rename(). There isn't
1211 * anything we can do here to help the situation, so
1212 * bubble up the appropriate error.
1213 */
1214 status = -ENOENT;
1215 goto bail;
1216 }
1217
1218 /* In case we need to overwrite an existing file, we blow it
1219 * away first */
1220 if (target_exists) {
1221 /* VFS didn't think there existed an inode here, but
1222 * someone else in the cluster must have raced our
1223 * rename to create one. Today we error cleanly, in
1224 * the future we should consider calling iget to build
1225 * a new struct inode for this entry. */
1226 if (!new_inode) {
1227 status = -EACCES;
1228
1229 mlog(0, "We found an inode for name %.*s but VFS "
1230 "didn't give us one.\n", new_dentry->d_name.len,
1231 new_dentry->d_name.name);
1232 goto bail;
1233 }
1234
1235 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1236 status = -EACCES;
1237
1238 mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n",
1239 (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1240 (unsigned long long)newfe_blkno,
1241 OCFS2_I(new_inode)->ip_flags);
1242 goto bail;
1243 }
1244
1245 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1246 if (status < 0) {
1247 if (status != -ENOENT)
1248 mlog_errno(status);
1249 goto bail;
1250 }
1251 new_child_locked = 1;
1252
1253 status = ocfs2_remote_dentry_delete(new_dentry);
1254 if (status < 0) {
1255 mlog_errno(status);
1256 goto bail;
1257 }
1258
1259 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1260
1261 mlog(0, "aha rename over existing... new_blkno=%llu "
1262 "newfebh=%p bhblocknr=%llu\n",
1263 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1264 (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1265
1266 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1267 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1268 OCFS2_I(new_inode)->ip_blkno,
1269 orphan_name, &orphan_insert);
1270 if (status < 0) {
1271 mlog_errno(status);
1272 goto bail;
1273 }
1274 }
1275 } else {
1276 BUG_ON(new_dentry->d_parent->d_inode != new_dir);
1277
1278 status = ocfs2_check_dir_for_entry(new_dir,
1279 new_dentry->d_name.name,
1280 new_dentry->d_name.len);
1281 if (status)
1282 goto bail;
1283
1284 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1285 new_dentry->d_name.name,
1286 new_dentry->d_name.len,
1287 &target_insert);
1288 if (status < 0) {
1289 mlog_errno(status);
1290 goto bail;
1291 }
1292 }
1293
1294 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1295 if (IS_ERR(handle)) {
1296 status = PTR_ERR(handle);
1297 handle = NULL;
1298 mlog_errno(status);
1299 goto bail;
1300 }
1301
1302 if (target_exists) {
1303 if (S_ISDIR(new_inode->i_mode)) {
1304 if (new_inode->i_nlink != 2 ||
1305 !ocfs2_empty_dir(new_inode)) {
1306 status = -ENOTEMPTY;
1307 goto bail;
1308 }
1309 }
1310 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1311 newfe_bh,
1312 OCFS2_JOURNAL_ACCESS_WRITE);
1313 if (status < 0) {
1314 mlog_errno(status);
1315 goto bail;
1316 }
1317
1318 if (S_ISDIR(new_inode->i_mode) ||
1319 (ocfs2_read_links_count(newfe) == 1)) {
1320 status = ocfs2_orphan_add(osb, handle, new_inode,
1321 newfe_bh, orphan_name,
1322 &orphan_insert, orphan_dir);
1323 if (status < 0) {
1324 mlog_errno(status);
1325 goto bail;
1326 }
1327 }
1328
1329 /* change the dirent to point to the correct inode */
1330 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1331 old_inode);
1332 if (status < 0) {
1333 mlog_errno(status);
1334 goto bail;
1335 }
1336 new_dir->i_version++;
1337
1338 if (S_ISDIR(new_inode->i_mode))
1339 ocfs2_set_links_count(newfe, 0);
1340 else
1341 ocfs2_add_links_count(newfe, -1);
1342 ocfs2_journal_dirty(handle, newfe_bh);
1343 } else {
1344 /* if the name was not found in new_dir, add it now */
1345 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1346 OCFS2_I(old_inode)->ip_blkno,
1347 new_dir_bh, &target_insert);
1348 }
1349
1350 old_inode->i_ctime = CURRENT_TIME;
1351 mark_inode_dirty(old_inode);
1352
1353 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1354 old_inode_bh,
1355 OCFS2_JOURNAL_ACCESS_WRITE);
1356 if (status >= 0) {
1357 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1358
1359 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1360 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1361 ocfs2_journal_dirty(handle, old_inode_bh);
1362 } else
1363 mlog_errno(status);
1364
1365 /*
1366 * Now that the name has been added to new_dir, remove the old name.
1367 *
1368 * We don't keep any directory entry context around until now
1369 * because the insert might have changed the type of directory
1370 * we're dealing with.
1371 */
1372 status = ocfs2_find_entry(old_dentry->d_name.name,
1373 old_dentry->d_name.len, old_dir,
1374 &old_entry_lookup);
1375 if (status)
1376 goto bail;
1377
1378 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1379 if (status < 0) {
1380 mlog_errno(status);
1381 goto bail;
1382 }
1383
1384 if (new_inode) {
1385 new_inode->i_nlink--;
1386 new_inode->i_ctime = CURRENT_TIME;
1387 }
1388 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1389
1390 if (update_dot_dot) {
1391 status = ocfs2_update_entry(old_inode, handle,
1392 &old_inode_dot_dot_res, new_dir);
1393 old_dir->i_nlink--;
1394 if (new_inode) {
1395 new_inode->i_nlink--;
1396 } else {
1397 inc_nlink(new_dir);
1398 mark_inode_dirty(new_dir);
1399 }
1400 }
1401 mark_inode_dirty(old_dir);
1402 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1403 if (new_inode) {
1404 mark_inode_dirty(new_inode);
1405 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1406 }
1407
1408 if (old_dir != new_dir) {
1409 /* Keep the same times on both directories.*/
1410 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1411
1412 /*
1413 * This will also pick up the i_nlink change from the
1414 * block above.
1415 */
1416 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1417 }
1418
1419 if (old_dir_nlink != old_dir->i_nlink) {
1420 if (!old_dir_bh) {
1421 mlog(ML_ERROR, "need to change nlink for old dir "
1422 "%llu from %d to %d but bh is NULL!\n",
1423 (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1424 (int)old_dir_nlink, old_dir->i_nlink);
1425 } else {
1426 struct ocfs2_dinode *fe;
1427 status = ocfs2_journal_access_di(handle,
1428 INODE_CACHE(old_dir),
1429 old_dir_bh,
1430 OCFS2_JOURNAL_ACCESS_WRITE);
1431 fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1432 ocfs2_set_links_count(fe, old_dir->i_nlink);
1433 ocfs2_journal_dirty(handle, old_dir_bh);
1434 }
1435 }
1436 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1437 status = 0;
1438 bail:
1439 if (rename_lock)
1440 ocfs2_rename_unlock(osb);
1441
1442 if (handle)
1443 ocfs2_commit_trans(osb, handle);
1444
1445 if (parents_locked)
1446 ocfs2_double_unlock(old_dir, new_dir);
1447
1448 if (old_child_locked)
1449 ocfs2_inode_unlock(old_inode, 1);
1450
1451 if (new_child_locked)
1452 ocfs2_inode_unlock(new_inode, 1);
1453
1454 if (orphan_dir) {
1455 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1456 ocfs2_inode_unlock(orphan_dir, 1);
1457 mutex_unlock(&orphan_dir->i_mutex);
1458 iput(orphan_dir);
1459 }
1460
1461 if (new_inode)
1462 sync_mapping_buffers(old_inode->i_mapping);
1463
1464 if (new_inode)
1465 iput(new_inode);
1466
1467 ocfs2_free_dir_lookup_result(&target_lookup_res);
1468 ocfs2_free_dir_lookup_result(&old_entry_lookup);
1469 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1470 ocfs2_free_dir_lookup_result(&orphan_insert);
1471 ocfs2_free_dir_lookup_result(&target_insert);
1472
1473 brelse(newfe_bh);
1474 brelse(old_inode_bh);
1475 brelse(old_dir_bh);
1476 brelse(new_dir_bh);
1477
1478 mlog_exit(status);
1479
1480 return status;
1481 }
1482
1483 /*
1484 * we expect i_size = strlen(symname). Copy symname into the file
1485 * data, including the null terminator.
1486 */
1487 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1488 handle_t *handle,
1489 struct inode *inode,
1490 const char *symname)
1491 {
1492 struct buffer_head **bhs = NULL;
1493 const char *c;
1494 struct super_block *sb = osb->sb;
1495 u64 p_blkno, p_blocks;
1496 int virtual, blocks, status, i, bytes_left;
1497
1498 bytes_left = i_size_read(inode) + 1;
1499 /* we can't trust i_blocks because we're actually going to
1500 * write i_size + 1 bytes. */
1501 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1502
1503 mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n",
1504 (unsigned long long)inode->i_blocks,
1505 i_size_read(inode), blocks);
1506
1507 /* Sanity check -- make sure we're going to fit. */
1508 if (bytes_left >
1509 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1510 status = -EIO;
1511 mlog_errno(status);
1512 goto bail;
1513 }
1514
1515 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1516 if (!bhs) {
1517 status = -ENOMEM;
1518 mlog_errno(status);
1519 goto bail;
1520 }
1521
1522 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1523 NULL);
1524 if (status < 0) {
1525 mlog_errno(status);
1526 goto bail;
1527 }
1528
1529 /* links can never be larger than one cluster so we know this
1530 * is all going to be contiguous, but do a sanity check
1531 * anyway. */
1532 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1533 status = -EIO;
1534 mlog_errno(status);
1535 goto bail;
1536 }
1537
1538 virtual = 0;
1539 while(bytes_left > 0) {
1540 c = &symname[virtual * sb->s_blocksize];
1541
1542 bhs[virtual] = sb_getblk(sb, p_blkno);
1543 if (!bhs[virtual]) {
1544 status = -ENOMEM;
1545 mlog_errno(status);
1546 goto bail;
1547 }
1548 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1549 bhs[virtual]);
1550
1551 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1552 bhs[virtual],
1553 OCFS2_JOURNAL_ACCESS_CREATE);
1554 if (status < 0) {
1555 mlog_errno(status);
1556 goto bail;
1557 }
1558
1559 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1560
1561 memcpy(bhs[virtual]->b_data, c,
1562 (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1563 bytes_left);
1564
1565 ocfs2_journal_dirty(handle, bhs[virtual]);
1566
1567 virtual++;
1568 p_blkno++;
1569 bytes_left -= sb->s_blocksize;
1570 }
1571
1572 status = 0;
1573 bail:
1574
1575 if (bhs) {
1576 for(i = 0; i < blocks; i++)
1577 brelse(bhs[i]);
1578 kfree(bhs);
1579 }
1580
1581 mlog_exit(status);
1582 return status;
1583 }
1584
1585 static int ocfs2_symlink(struct inode *dir,
1586 struct dentry *dentry,
1587 const char *symname)
1588 {
1589 int status, l, credits;
1590 u64 newsize;
1591 struct ocfs2_super *osb = NULL;
1592 struct inode *inode = NULL;
1593 struct super_block *sb;
1594 struct buffer_head *new_fe_bh = NULL;
1595 struct buffer_head *parent_fe_bh = NULL;
1596 struct ocfs2_dinode *fe = NULL;
1597 struct ocfs2_dinode *dirfe;
1598 handle_t *handle = NULL;
1599 struct ocfs2_alloc_context *inode_ac = NULL;
1600 struct ocfs2_alloc_context *data_ac = NULL;
1601 struct ocfs2_alloc_context *xattr_ac = NULL;
1602 int want_clusters = 0;
1603 int xattr_credits = 0;
1604 struct ocfs2_security_xattr_info si = {
1605 .enable = 1,
1606 };
1607 int did_quota = 0, did_quota_inode = 0;
1608 struct ocfs2_dir_lookup_result lookup = { NULL, };
1609 sigset_t oldset;
1610 int did_block_signals = 0;
1611
1612 mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir,
1613 dentry, symname, dentry->d_name.len, dentry->d_name.name);
1614
1615 dquot_initialize(dir);
1616
1617 sb = dir->i_sb;
1618 osb = OCFS2_SB(sb);
1619
1620 l = strlen(symname) + 1;
1621
1622 credits = ocfs2_calc_symlink_credits(sb);
1623
1624 /* lock the parent directory */
1625 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1626 if (status < 0) {
1627 if (status != -ENOENT)
1628 mlog_errno(status);
1629 return status;
1630 }
1631
1632 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1633 if (!ocfs2_read_links_count(dirfe)) {
1634 /* can't make a file in a deleted directory. */
1635 status = -ENOENT;
1636 goto bail;
1637 }
1638
1639 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1640 dentry->d_name.len);
1641 if (status)
1642 goto bail;
1643
1644 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1645 dentry->d_name.name,
1646 dentry->d_name.len, &lookup);
1647 if (status < 0) {
1648 mlog_errno(status);
1649 goto bail;
1650 }
1651
1652 status = ocfs2_reserve_new_inode(osb, &inode_ac);
1653 if (status < 0) {
1654 if (status != -ENOSPC)
1655 mlog_errno(status);
1656 goto bail;
1657 }
1658
1659 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1660 if (!inode) {
1661 status = -ENOMEM;
1662 mlog_errno(status);
1663 goto bail;
1664 }
1665
1666 /* get security xattr */
1667 status = ocfs2_init_security_get(inode, dir, &si);
1668 if (status) {
1669 if (status == -EOPNOTSUPP)
1670 si.enable = 0;
1671 else {
1672 mlog_errno(status);
1673 goto bail;
1674 }
1675 }
1676
1677 /* calculate meta data/clusters for setting security xattr */
1678 if (si.enable) {
1679 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1680 &xattr_credits, &xattr_ac);
1681 if (status < 0) {
1682 mlog_errno(status);
1683 goto bail;
1684 }
1685 }
1686
1687 /* don't reserve bitmap space for fast symlinks. */
1688 if (l > ocfs2_fast_symlink_chars(sb))
1689 want_clusters += 1;
1690
1691 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1692 if (status < 0) {
1693 if (status != -ENOSPC)
1694 mlog_errno(status);
1695 goto bail;
1696 }
1697
1698 handle = ocfs2_start_trans(osb, credits + xattr_credits);
1699 if (IS_ERR(handle)) {
1700 status = PTR_ERR(handle);
1701 handle = NULL;
1702 mlog_errno(status);
1703 goto bail;
1704 }
1705
1706 /* Starting to change things, restart is no longer possible. */
1707 ocfs2_block_signals(&oldset);
1708 did_block_signals = 1;
1709
1710 status = dquot_alloc_inode(inode);
1711 if (status)
1712 goto bail;
1713 did_quota_inode = 1;
1714
1715 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry,
1716 inode->i_mode, dentry->d_name.len,
1717 dentry->d_name.name);
1718
1719 status = ocfs2_mknod_locked(osb, dir, inode,
1720 0, &new_fe_bh, parent_fe_bh, handle,
1721 inode_ac);
1722 if (status < 0) {
1723 mlog_errno(status);
1724 goto bail;
1725 }
1726
1727 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1728 inode->i_rdev = 0;
1729 newsize = l - 1;
1730 if (l > ocfs2_fast_symlink_chars(sb)) {
1731 u32 offset = 0;
1732
1733 inode->i_op = &ocfs2_symlink_inode_operations;
1734 status = dquot_alloc_space_nodirty(inode,
1735 ocfs2_clusters_to_bytes(osb->sb, 1));
1736 if (status)
1737 goto bail;
1738 did_quota = 1;
1739 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1740 new_fe_bh,
1741 handle, data_ac, NULL,
1742 NULL);
1743 if (status < 0) {
1744 if (status != -ENOSPC && status != -EINTR) {
1745 mlog(ML_ERROR,
1746 "Failed to extend file to %llu\n",
1747 (unsigned long long)newsize);
1748 mlog_errno(status);
1749 status = -ENOSPC;
1750 }
1751 goto bail;
1752 }
1753 i_size_write(inode, newsize);
1754 inode->i_blocks = ocfs2_inode_sector_count(inode);
1755 } else {
1756 inode->i_op = &ocfs2_fast_symlink_inode_operations;
1757 memcpy((char *) fe->id2.i_symlink, symname, l);
1758 i_size_write(inode, newsize);
1759 inode->i_blocks = 0;
1760 }
1761
1762 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1763 if (status < 0) {
1764 mlog_errno(status);
1765 goto bail;
1766 }
1767
1768 if (!ocfs2_inode_is_fast_symlink(inode)) {
1769 status = ocfs2_create_symlink_data(osb, handle, inode,
1770 symname);
1771 if (status < 0) {
1772 mlog_errno(status);
1773 goto bail;
1774 }
1775 }
1776
1777 if (si.enable) {
1778 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1779 xattr_ac, data_ac);
1780 if (status < 0) {
1781 mlog_errno(status);
1782 goto bail;
1783 }
1784 }
1785
1786 /*
1787 * Do this before adding the entry to the directory. We add
1788 * also set d_op after success so that ->d_iput() will cleanup
1789 * the dentry lock even if ocfs2_add_entry() fails below.
1790 */
1791 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1792 if (status) {
1793 mlog_errno(status);
1794 goto bail;
1795 }
1796 dentry->d_op = &ocfs2_dentry_ops;
1797
1798 status = ocfs2_add_entry(handle, dentry, inode,
1799 le64_to_cpu(fe->i_blkno), parent_fe_bh,
1800 &lookup);
1801 if (status < 0) {
1802 mlog_errno(status);
1803 goto bail;
1804 }
1805
1806 insert_inode_hash(inode);
1807 d_instantiate(dentry, inode);
1808 bail:
1809 if (status < 0 && did_quota)
1810 dquot_free_space_nodirty(inode,
1811 ocfs2_clusters_to_bytes(osb->sb, 1));
1812 if (status < 0 && did_quota_inode)
1813 dquot_free_inode(inode);
1814 if (handle)
1815 ocfs2_commit_trans(osb, handle);
1816
1817 ocfs2_inode_unlock(dir, 1);
1818 if (did_block_signals)
1819 ocfs2_unblock_signals(&oldset);
1820
1821 brelse(new_fe_bh);
1822 brelse(parent_fe_bh);
1823 kfree(si.name);
1824 kfree(si.value);
1825 ocfs2_free_dir_lookup_result(&lookup);
1826 if (inode_ac)
1827 ocfs2_free_alloc_context(inode_ac);
1828 if (data_ac)
1829 ocfs2_free_alloc_context(data_ac);
1830 if (xattr_ac)
1831 ocfs2_free_alloc_context(xattr_ac);
1832 if ((status < 0) && inode) {
1833 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
1834 clear_nlink(inode);
1835 iput(inode);
1836 }
1837
1838 mlog_exit(status);
1839
1840 return status;
1841 }
1842
1843 static int ocfs2_blkno_stringify(u64 blkno, char *name)
1844 {
1845 int status, namelen;
1846
1847 mlog_entry_void();
1848
1849 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
1850 (long long)blkno);
1851 if (namelen <= 0) {
1852 if (namelen)
1853 status = namelen;
1854 else
1855 status = -EINVAL;
1856 mlog_errno(status);
1857 goto bail;
1858 }
1859 if (namelen != OCFS2_ORPHAN_NAMELEN) {
1860 status = -EINVAL;
1861 mlog_errno(status);
1862 goto bail;
1863 }
1864
1865 mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name,
1866 namelen);
1867
1868 status = 0;
1869 bail:
1870 mlog_exit(status);
1871 return status;
1872 }
1873
1874 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
1875 struct inode **ret_orphan_dir,
1876 struct buffer_head **ret_orphan_dir_bh)
1877 {
1878 struct inode *orphan_dir_inode;
1879 struct buffer_head *orphan_dir_bh = NULL;
1880 int ret = 0;
1881
1882 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
1883 ORPHAN_DIR_SYSTEM_INODE,
1884 osb->slot_num);
1885 if (!orphan_dir_inode) {
1886 ret = -ENOENT;
1887 mlog_errno(ret);
1888 return ret;
1889 }
1890
1891 mutex_lock(&orphan_dir_inode->i_mutex);
1892
1893 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
1894 if (ret < 0) {
1895 mutex_unlock(&orphan_dir_inode->i_mutex);
1896 iput(orphan_dir_inode);
1897
1898 mlog_errno(ret);
1899 return ret;
1900 }
1901
1902 *ret_orphan_dir = orphan_dir_inode;
1903 *ret_orphan_dir_bh = orphan_dir_bh;
1904
1905 return 0;
1906 }
1907
1908 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
1909 struct buffer_head *orphan_dir_bh,
1910 u64 blkno,
1911 char *name,
1912 struct ocfs2_dir_lookup_result *lookup)
1913 {
1914 int ret;
1915 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
1916
1917 ret = ocfs2_blkno_stringify(blkno, name);
1918 if (ret < 0) {
1919 mlog_errno(ret);
1920 return ret;
1921 }
1922
1923 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
1924 orphan_dir_bh, name,
1925 OCFS2_ORPHAN_NAMELEN, lookup);
1926 if (ret < 0) {
1927 mlog_errno(ret);
1928 return ret;
1929 }
1930
1931 return 0;
1932 }
1933
1934 /**
1935 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
1936 * insertion of an orphan.
1937 * @osb: ocfs2 file system
1938 * @ret_orphan_dir: Orphan dir inode - returned locked!
1939 * @blkno: Actual block number of the inode to be inserted into orphan dir.
1940 * @lookup: dir lookup result, to be passed back into functions like
1941 * ocfs2_orphan_add
1942 *
1943 * Returns zero on success and the ret_orphan_dir, name and lookup
1944 * fields will be populated.
1945 *
1946 * Returns non-zero on failure.
1947 */
1948 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
1949 struct inode **ret_orphan_dir,
1950 u64 blkno,
1951 char *name,
1952 struct ocfs2_dir_lookup_result *lookup)
1953 {
1954 struct inode *orphan_dir_inode = NULL;
1955 struct buffer_head *orphan_dir_bh = NULL;
1956 int ret = 0;
1957
1958 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
1959 &orphan_dir_bh);
1960 if (ret < 0) {
1961 mlog_errno(ret);
1962 return ret;
1963 }
1964
1965 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
1966 blkno, name, lookup);
1967 if (ret < 0) {
1968 mlog_errno(ret);
1969 goto out;
1970 }
1971
1972 *ret_orphan_dir = orphan_dir_inode;
1973
1974 out:
1975 brelse(orphan_dir_bh);
1976
1977 if (ret) {
1978 ocfs2_inode_unlock(orphan_dir_inode, 1);
1979 mutex_unlock(&orphan_dir_inode->i_mutex);
1980 iput(orphan_dir_inode);
1981 }
1982
1983 mlog_exit(ret);
1984 return ret;
1985 }
1986
1987 static int ocfs2_orphan_add(struct ocfs2_super *osb,
1988 handle_t *handle,
1989 struct inode *inode,
1990 struct buffer_head *fe_bh,
1991 char *name,
1992 struct ocfs2_dir_lookup_result *lookup,
1993 struct inode *orphan_dir_inode)
1994 {
1995 struct buffer_head *orphan_dir_bh = NULL;
1996 int status = 0;
1997 struct ocfs2_dinode *orphan_fe;
1998 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
1999
2000 mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);
2001
2002 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2003 if (status < 0) {
2004 mlog_errno(status);
2005 goto leave;
2006 }
2007
2008 status = ocfs2_journal_access_di(handle,
2009 INODE_CACHE(orphan_dir_inode),
2010 orphan_dir_bh,
2011 OCFS2_JOURNAL_ACCESS_WRITE);
2012 if (status < 0) {
2013 mlog_errno(status);
2014 goto leave;
2015 }
2016
2017 /* we're a cluster, and nlink can change on disk from
2018 * underneath us... */
2019 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2020 if (S_ISDIR(inode->i_mode))
2021 ocfs2_add_links_count(orphan_fe, 1);
2022 orphan_dir_inode->i_nlink = ocfs2_read_links_count(orphan_fe);
2023 ocfs2_journal_dirty(handle, orphan_dir_bh);
2024
2025 status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2026 OCFS2_ORPHAN_NAMELEN, inode,
2027 OCFS2_I(inode)->ip_blkno,
2028 orphan_dir_bh, lookup);
2029 if (status < 0) {
2030 mlog_errno(status);
2031 goto leave;
2032 }
2033
2034 /*
2035 * We're going to journal the change of i_flags and i_orphaned_slot.
2036 * It's safe anyway, though some callers may duplicate the journaling.
2037 * Journaling within the func just make the logic look more
2038 * straightforward.
2039 */
2040 status = ocfs2_journal_access_di(handle,
2041 INODE_CACHE(inode),
2042 fe_bh,
2043 OCFS2_JOURNAL_ACCESS_WRITE);
2044 if (status < 0) {
2045 mlog_errno(status);
2046 goto leave;
2047 }
2048
2049 le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL);
2050 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2051
2052 /* Record which orphan dir our inode now resides
2053 * in. delete_inode will use this to determine which orphan
2054 * dir to lock. */
2055 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2056
2057 ocfs2_journal_dirty(handle, fe_bh);
2058
2059 mlog(0, "Inode %llu orphaned in slot %d\n",
2060 (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num);
2061
2062 leave:
2063 brelse(orphan_dir_bh);
2064
2065 mlog_exit(status);
2066 return status;
2067 }
2068
2069 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2070 int ocfs2_orphan_del(struct ocfs2_super *osb,
2071 handle_t *handle,
2072 struct inode *orphan_dir_inode,
2073 struct inode *inode,
2074 struct buffer_head *orphan_dir_bh)
2075 {
2076 char name[OCFS2_ORPHAN_NAMELEN + 1];
2077 struct ocfs2_dinode *orphan_fe;
2078 int status = 0;
2079 struct ocfs2_dir_lookup_result lookup = { NULL, };
2080
2081 mlog_entry_void();
2082
2083 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2084 if (status < 0) {
2085 mlog_errno(status);
2086 goto leave;
2087 }
2088
2089 mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n",
2090 name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2091 OCFS2_ORPHAN_NAMELEN);
2092
2093 /* find it's spot in the orphan directory */
2094 status = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, orphan_dir_inode,
2095 &lookup);
2096 if (status) {
2097 mlog_errno(status);
2098 goto leave;
2099 }
2100
2101 /* remove it from the orphan directory */
2102 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2103 if (status < 0) {
2104 mlog_errno(status);
2105 goto leave;
2106 }
2107
2108 status = ocfs2_journal_access_di(handle,
2109 INODE_CACHE(orphan_dir_inode),
2110 orphan_dir_bh,
2111 OCFS2_JOURNAL_ACCESS_WRITE);
2112 if (status < 0) {
2113 mlog_errno(status);
2114 goto leave;
2115 }
2116
2117 /* do the i_nlink dance! :) */
2118 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2119 if (S_ISDIR(inode->i_mode))
2120 ocfs2_add_links_count(orphan_fe, -1);
2121 orphan_dir_inode->i_nlink = ocfs2_read_links_count(orphan_fe);
2122 ocfs2_journal_dirty(handle, orphan_dir_bh);
2123
2124 leave:
2125 ocfs2_free_dir_lookup_result(&lookup);
2126
2127 mlog_exit(status);
2128 return status;
2129 }
2130
2131 /**
2132 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to recieve a newly
2133 * allocated file. This is different from the typical 'add to orphan dir'
2134 * operation in that the inode does not yet exist. This is a problem because
2135 * the orphan dir stringifies the inode block number to come up with it's
2136 * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2137 * problem. This function works around it by calling deeper into the orphan
2138 * and suballoc code than other callers. Use this only by necessity.
2139 * @dir: The directory which this inode will ultimately wind up under - not the
2140 * orphan dir!
2141 * @dir_bh: buffer_head the @dir inode block
2142 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2143 * with the string to be used for orphan dirent. Pass back to the orphan dir
2144 * code.
2145 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2146 * dir code.
2147 * @ret_di_blkno: block number where the new inode will be allocated.
2148 * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2149 * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2150 *
2151 * Returns zero on success and the ret_orphan_dir, name and lookup
2152 * fields will be populated.
2153 *
2154 * Returns non-zero on failure.
2155 */
2156 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2157 struct buffer_head *dir_bh,
2158 char *orphan_name,
2159 struct inode **ret_orphan_dir,
2160 u64 *ret_di_blkno,
2161 struct ocfs2_dir_lookup_result *orphan_insert,
2162 struct ocfs2_alloc_context **ret_inode_ac)
2163 {
2164 int ret;
2165 u64 di_blkno;
2166 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2167 struct inode *orphan_dir = NULL;
2168 struct buffer_head *orphan_dir_bh = NULL;
2169 struct ocfs2_alloc_context *inode_ac = NULL;
2170
2171 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2172 if (ret < 0) {
2173 mlog_errno(ret);
2174 return ret;
2175 }
2176
2177 /* reserve an inode spot */
2178 ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2179 if (ret < 0) {
2180 if (ret != -ENOSPC)
2181 mlog_errno(ret);
2182 goto out;
2183 }
2184
2185 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2186 &di_blkno);
2187 if (ret) {
2188 mlog_errno(ret);
2189 goto out;
2190 }
2191
2192 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2193 di_blkno, orphan_name, orphan_insert);
2194 if (ret < 0) {
2195 mlog_errno(ret);
2196 goto out;
2197 }
2198
2199 out:
2200 if (ret == 0) {
2201 *ret_orphan_dir = orphan_dir;
2202 *ret_di_blkno = di_blkno;
2203 *ret_inode_ac = inode_ac;
2204 /*
2205 * orphan_name and orphan_insert are already up to
2206 * date via prepare_orphan_dir
2207 */
2208 } else {
2209 /* Unroll reserve_new_inode* */
2210 if (inode_ac)
2211 ocfs2_free_alloc_context(inode_ac);
2212
2213 /* Unroll orphan dir locking */
2214 mutex_unlock(&orphan_dir->i_mutex);
2215 ocfs2_inode_unlock(orphan_dir, 1);
2216 iput(orphan_dir);
2217 }
2218
2219 brelse(orphan_dir_bh);
2220
2221 return 0;
2222 }
2223
2224 int ocfs2_create_inode_in_orphan(struct inode *dir,
2225 int mode,
2226 struct inode **new_inode)
2227 {
2228 int status, did_quota_inode = 0;
2229 struct inode *inode = NULL;
2230 struct inode *orphan_dir = NULL;
2231 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2232 struct ocfs2_dinode *di = NULL;
2233 handle_t *handle = NULL;
2234 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2235 struct buffer_head *parent_di_bh = NULL;
2236 struct buffer_head *new_di_bh = NULL;
2237 struct ocfs2_alloc_context *inode_ac = NULL;
2238 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2239 u64 uninitialized_var(di_blkno), suballoc_loc;
2240 u16 suballoc_bit;
2241
2242 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2243 if (status < 0) {
2244 if (status != -ENOENT)
2245 mlog_errno(status);
2246 return status;
2247 }
2248
2249 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2250 orphan_name, &orphan_dir,
2251 &di_blkno, &orphan_insert, &inode_ac);
2252 if (status < 0) {
2253 if (status != -ENOSPC)
2254 mlog_errno(status);
2255 goto leave;
2256 }
2257
2258 inode = ocfs2_get_init_inode(dir, mode);
2259 if (!inode) {
2260 status = -ENOMEM;
2261 mlog_errno(status);
2262 goto leave;
2263 }
2264
2265 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2266 if (IS_ERR(handle)) {
2267 status = PTR_ERR(handle);
2268 handle = NULL;
2269 mlog_errno(status);
2270 goto leave;
2271 }
2272
2273 status = dquot_alloc_inode(inode);
2274 if (status)
2275 goto leave;
2276 did_quota_inode = 1;
2277
2278 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2279 &suballoc_loc,
2280 &suballoc_bit, di_blkno);
2281 if (status < 0) {
2282 mlog_errno(status);
2283 goto leave;
2284 }
2285
2286 inode->i_nlink = 0;
2287 /* do the real work now. */
2288 status = __ocfs2_mknod_locked(dir, inode,
2289 0, &new_di_bh, parent_di_bh, handle,
2290 inode_ac, di_blkno, suballoc_loc,
2291 suballoc_bit);
2292 if (status < 0) {
2293 mlog_errno(status);
2294 goto leave;
2295 }
2296
2297 di = (struct ocfs2_dinode *)new_di_bh->b_data;
2298 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2299 &orphan_insert, orphan_dir);
2300 if (status < 0) {
2301 mlog_errno(status);
2302 goto leave;
2303 }
2304
2305 /* get open lock so that only nodes can't remove it from orphan dir. */
2306 status = ocfs2_open_lock(inode);
2307 if (status < 0)
2308 mlog_errno(status);
2309
2310 insert_inode_hash(inode);
2311 leave:
2312 if (status < 0 && did_quota_inode)
2313 dquot_free_inode(inode);
2314 if (handle)
2315 ocfs2_commit_trans(osb, handle);
2316
2317 if (orphan_dir) {
2318 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2319 ocfs2_inode_unlock(orphan_dir, 1);
2320 mutex_unlock(&orphan_dir->i_mutex);
2321 iput(orphan_dir);
2322 }
2323
2324 if (status == -ENOSPC)
2325 mlog(0, "Disk is full\n");
2326
2327 if ((status < 0) && inode) {
2328 clear_nlink(inode);
2329 iput(inode);
2330 }
2331
2332 if (inode_ac)
2333 ocfs2_free_alloc_context(inode_ac);
2334
2335 brelse(new_di_bh);
2336
2337 if (!status)
2338 *new_inode = inode;
2339
2340 ocfs2_free_dir_lookup_result(&orphan_insert);
2341
2342 ocfs2_inode_unlock(dir, 1);
2343 brelse(parent_di_bh);
2344 return status;
2345 }
2346
2347 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2348 struct inode *inode,
2349 struct dentry *dentry)
2350 {
2351 int status = 0;
2352 struct buffer_head *parent_di_bh = NULL;
2353 handle_t *handle = NULL;
2354 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2355 struct ocfs2_dinode *dir_di, *di;
2356 struct inode *orphan_dir_inode = NULL;
2357 struct buffer_head *orphan_dir_bh = NULL;
2358 struct buffer_head *di_bh = NULL;
2359 struct ocfs2_dir_lookup_result lookup = { NULL, };
2360
2361 mlog_entry("(0x%p, 0x%p, %.*s')\n", dir, dentry,
2362 dentry->d_name.len, dentry->d_name.name);
2363
2364 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2365 if (status < 0) {
2366 if (status != -ENOENT)
2367 mlog_errno(status);
2368 return status;
2369 }
2370
2371 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2372 if (!dir_di->i_links_count) {
2373 /* can't make a file in a deleted directory. */
2374 status = -ENOENT;
2375 goto leave;
2376 }
2377
2378 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2379 dentry->d_name.len);
2380 if (status)
2381 goto leave;
2382
2383 /* get a spot inside the dir. */
2384 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2385 dentry->d_name.name,
2386 dentry->d_name.len, &lookup);
2387 if (status < 0) {
2388 mlog_errno(status);
2389 goto leave;
2390 }
2391
2392 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2393 ORPHAN_DIR_SYSTEM_INODE,
2394 osb->slot_num);
2395 if (!orphan_dir_inode) {
2396 status = -EEXIST;
2397 mlog_errno(status);
2398 goto leave;
2399 }
2400
2401 mutex_lock(&orphan_dir_inode->i_mutex);
2402
2403 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2404 if (status < 0) {
2405 mlog_errno(status);
2406 mutex_unlock(&orphan_dir_inode->i_mutex);
2407 iput(orphan_dir_inode);
2408 goto leave;
2409 }
2410
2411 status = ocfs2_read_inode_block(inode, &di_bh);
2412 if (status < 0) {
2413 mlog_errno(status);
2414 goto orphan_unlock;
2415 }
2416
2417 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2418 if (IS_ERR(handle)) {
2419 status = PTR_ERR(handle);
2420 handle = NULL;
2421 mlog_errno(status);
2422 goto orphan_unlock;
2423 }
2424
2425 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2426 di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2427 if (status < 0) {
2428 mlog_errno(status);
2429 goto out_commit;
2430 }
2431
2432 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2433 orphan_dir_bh);
2434 if (status < 0) {
2435 mlog_errno(status);
2436 goto out_commit;
2437 }
2438
2439 di = (struct ocfs2_dinode *)di_bh->b_data;
2440 le32_add_cpu(&di->i_flags, -OCFS2_ORPHANED_FL);
2441 di->i_orphaned_slot = 0;
2442 inode->i_nlink = 1;
2443 ocfs2_set_links_count(di, inode->i_nlink);
2444 ocfs2_journal_dirty(handle, di_bh);
2445
2446 status = ocfs2_add_entry(handle, dentry, inode,
2447 OCFS2_I(inode)->ip_blkno, parent_di_bh,
2448 &lookup);
2449 if (status < 0) {
2450 mlog_errno(status);
2451 goto out_commit;
2452 }
2453
2454 status = ocfs2_dentry_attach_lock(dentry, inode,
2455 OCFS2_I(dir)->ip_blkno);
2456 if (status) {
2457 mlog_errno(status);
2458 goto out_commit;
2459 }
2460
2461 dentry->d_op = &ocfs2_dentry_ops;
2462 d_instantiate(dentry, inode);
2463 status = 0;
2464 out_commit:
2465 ocfs2_commit_trans(osb, handle);
2466 orphan_unlock:
2467 ocfs2_inode_unlock(orphan_dir_inode, 1);
2468 mutex_unlock(&orphan_dir_inode->i_mutex);
2469 iput(orphan_dir_inode);
2470 leave:
2471
2472 ocfs2_inode_unlock(dir, 1);
2473
2474 brelse(di_bh);
2475 brelse(parent_di_bh);
2476 brelse(orphan_dir_bh);
2477
2478 ocfs2_free_dir_lookup_result(&lookup);
2479
2480 mlog_exit(status);
2481
2482 return status;
2483 }
2484
2485 const struct inode_operations ocfs2_dir_iops = {
2486 .create = ocfs2_create,
2487 .lookup = ocfs2_lookup,
2488 .link = ocfs2_link,
2489 .unlink = ocfs2_unlink,
2490 .rmdir = ocfs2_unlink,
2491 .symlink = ocfs2_symlink,
2492 .mkdir = ocfs2_mkdir,
2493 .mknod = ocfs2_mknod,
2494 .rename = ocfs2_rename,
2495 .setattr = ocfs2_setattr,
2496 .getattr = ocfs2_getattr,
2497 .permission = ocfs2_permission,
2498 .setxattr = generic_setxattr,
2499 .getxattr = generic_getxattr,
2500 .listxattr = ocfs2_listxattr,
2501 .removexattr = generic_removexattr,
2502 .fiemap = ocfs2_fiemap,
2503 };
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree