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drm/i915: fix corruptions on i8xx due to relaxed fencing
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / ocfs2 / namei.c
blob849fb4a2e814a9a640e90e410e435b2a3209d598
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 ret = d_splice_alias(inode, dentry);
151
152 if (inode) {
153 /*
154 * If d_splice_alias() finds a DCACHE_DISCONNECTED
155 * dentry, it will d_move() it on top of ourse. The
156 * return value will indicate this however, so in
157 * those cases, we switch them around for the locking
158 * code.
159 *
160 * NOTE: This dentry already has ->d_op set from
161 * ocfs2_get_parent() and ocfs2_get_dentry()
162 */
163 if (ret)
164 dentry = ret;
165
166 status = ocfs2_dentry_attach_lock(dentry, inode,
167 OCFS2_I(dir)->ip_blkno);
168 if (status) {
169 mlog_errno(status);
170 ret = ERR_PTR(status);
171 goto bail_unlock;
172 }
173 } else
174 ocfs2_dentry_attach_gen(dentry);
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
418 status = ocfs2_add_entry(handle, dentry, inode,
419 OCFS2_I(inode)->ip_blkno, parent_fe_bh,
420 &lookup);
421 if (status < 0) {
422 mlog_errno(status);
423 goto leave;
424 }
425
426 insert_inode_hash(inode);
427 d_instantiate(dentry, inode);
428 status = 0;
429 leave:
430 if (status < 0 && did_quota_inode)
431 dquot_free_inode(inode);
432 if (handle)
433 ocfs2_commit_trans(osb, handle);
434
435 ocfs2_inode_unlock(dir, 1);
436 if (did_block_signals)
437 ocfs2_unblock_signals(&oldset);
438
439 if (status == -ENOSPC)
440 mlog(0, "Disk is full\n");
441
442 brelse(new_fe_bh);
443 brelse(parent_fe_bh);
444 kfree(si.name);
445 kfree(si.value);
446
447 ocfs2_free_dir_lookup_result(&lookup);
448
449 if (inode_ac)
450 ocfs2_free_alloc_context(inode_ac);
451
452 if (data_ac)
453 ocfs2_free_alloc_context(data_ac);
454
455 if (meta_ac)
456 ocfs2_free_alloc_context(meta_ac);
457
458 /*
459 * We should call iput after the i_mutex of the bitmap been
460 * unlocked in ocfs2_free_alloc_context, or the
461 * ocfs2_delete_inode will mutex_lock again.
462 */
463 if ((status < 0) && inode) {
464 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
465 clear_nlink(inode);
466 iput(inode);
467 }
468
469 mlog_exit(status);
470
471 return status;
472 }
473
474 static int __ocfs2_mknod_locked(struct inode *dir,
475 struct inode *inode,
476 dev_t dev,
477 struct buffer_head **new_fe_bh,
478 struct buffer_head *parent_fe_bh,
479 handle_t *handle,
480 struct ocfs2_alloc_context *inode_ac,
481 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
482 {
483 int status = 0;
484 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
485 struct ocfs2_dinode *fe = NULL;
486 struct ocfs2_extent_list *fel;
487 u16 feat;
488
489 *new_fe_bh = NULL;
490
491 /* populate as many fields early on as possible - many of
492 * these are used by the support functions here and in
493 * callers. */
494 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
495 OCFS2_I(inode)->ip_blkno = fe_blkno;
496 spin_lock(&osb->osb_lock);
497 inode->i_generation = osb->s_next_generation++;
498 spin_unlock(&osb->osb_lock);
499
500 *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
501 if (!*new_fe_bh) {
502 status = -EIO;
503 mlog_errno(status);
504 goto leave;
505 }
506 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
507
508 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
509 *new_fe_bh,
510 OCFS2_JOURNAL_ACCESS_CREATE);
511 if (status < 0) {
512 mlog_errno(status);
513 goto leave;
514 }
515
516 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
517 memset(fe, 0, osb->sb->s_blocksize);
518
519 fe->i_generation = cpu_to_le32(inode->i_generation);
520 fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
521 fe->i_blkno = cpu_to_le64(fe_blkno);
522 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
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 ocfs2_journal_dirty(handle, *new_fe_bh);
560
561 ocfs2_populate_inode(inode, fe, 1);
562 ocfs2_ci_set_new(osb, INODE_CACHE(inode));
563 if (!ocfs2_mount_local(osb)) {
564 status = ocfs2_create_new_inode_locks(inode);
565 if (status < 0)
566 mlog_errno(status);
567 }
568
569 status = 0; /* error in ocfs2_create_new_inode_locks is not
570 * critical */
571
572 leave:
573 if (status < 0) {
574 if (*new_fe_bh) {
575 brelse(*new_fe_bh);
576 *new_fe_bh = NULL;
577 }
578 }
579
580 mlog_exit(status);
581 return status;
582 }
583
584 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
585 struct inode *dir,
586 struct inode *inode,
587 dev_t dev,
588 struct buffer_head **new_fe_bh,
589 struct buffer_head *parent_fe_bh,
590 handle_t *handle,
591 struct ocfs2_alloc_context *inode_ac)
592 {
593 int status = 0;
594 u64 suballoc_loc, fe_blkno = 0;
595 u16 suballoc_bit;
596
597 *new_fe_bh = NULL;
598
599 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
600 inode_ac, &suballoc_loc,
601 &suballoc_bit, &fe_blkno);
602 if (status < 0) {
603 mlog_errno(status);
604 return status;
605 }
606
607 return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
608 parent_fe_bh, handle, inode_ac,
609 fe_blkno, suballoc_loc, suballoc_bit);
610 }
611
612 static int ocfs2_mkdir(struct inode *dir,
613 struct dentry *dentry,
614 int mode)
615 {
616 int ret;
617
618 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
619 dentry->d_name.len, dentry->d_name.name);
620 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
621 mlog_exit(ret);
622
623 return ret;
624 }
625
626 static int ocfs2_create(struct inode *dir,
627 struct dentry *dentry,
628 int mode,
629 struct nameidata *nd)
630 {
631 int ret;
632
633 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
634 dentry->d_name.len, dentry->d_name.name);
635 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
636 mlog_exit(ret);
637
638 return ret;
639 }
640
641 static int ocfs2_link(struct dentry *old_dentry,
642 struct inode *dir,
643 struct dentry *dentry)
644 {
645 handle_t *handle;
646 struct inode *inode = old_dentry->d_inode;
647 int err;
648 struct buffer_head *fe_bh = NULL;
649 struct buffer_head *parent_fe_bh = NULL;
650 struct ocfs2_dinode *fe = NULL;
651 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
652 struct ocfs2_dir_lookup_result lookup = { NULL, };
653 sigset_t oldset;
654
655 mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino,
656 old_dentry->d_name.len, old_dentry->d_name.name,
657 dentry->d_name.len, dentry->d_name.name);
658
659 if (S_ISDIR(inode->i_mode))
660 return -EPERM;
661
662 dquot_initialize(dir);
663
664 err = ocfs2_inode_lock_nested(dir, &parent_fe_bh, 1, OI_LS_PARENT);
665 if (err < 0) {
666 if (err != -ENOENT)
667 mlog_errno(err);
668 return err;
669 }
670
671 if (!dir->i_nlink) {
672 err = -ENOENT;
673 goto out;
674 }
675
676 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
677 dentry->d_name.len);
678 if (err)
679 goto out;
680
681 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
682 dentry->d_name.name,
683 dentry->d_name.len, &lookup);
684 if (err < 0) {
685 mlog_errno(err);
686 goto out;
687 }
688
689 err = ocfs2_inode_lock(inode, &fe_bh, 1);
690 if (err < 0) {
691 if (err != -ENOENT)
692 mlog_errno(err);
693 goto out;
694 }
695
696 fe = (struct ocfs2_dinode *) fe_bh->b_data;
697 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
698 err = -EMLINK;
699 goto out_unlock_inode;
700 }
701
702 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
703 if (IS_ERR(handle)) {
704 err = PTR_ERR(handle);
705 handle = NULL;
706 mlog_errno(err);
707 goto out_unlock_inode;
708 }
709
710 /* Starting to change things, restart is no longer possible. */
711 ocfs2_block_signals(&oldset);
712
713 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
714 OCFS2_JOURNAL_ACCESS_WRITE);
715 if (err < 0) {
716 mlog_errno(err);
717 goto out_commit;
718 }
719
720 inc_nlink(inode);
721 inode->i_ctime = CURRENT_TIME;
722 ocfs2_set_links_count(fe, inode->i_nlink);
723 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
724 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
725 ocfs2_journal_dirty(handle, fe_bh);
726
727 err = ocfs2_add_entry(handle, dentry, inode,
728 OCFS2_I(inode)->ip_blkno,
729 parent_fe_bh, &lookup);
730 if (err) {
731 ocfs2_add_links_count(fe, -1);
732 drop_nlink(inode);
733 mlog_errno(err);
734 goto out_commit;
735 }
736
737 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
738 if (err) {
739 mlog_errno(err);
740 goto out_commit;
741 }
742
743 ihold(inode);
744 d_instantiate(dentry, inode);
745
746 out_commit:
747 ocfs2_commit_trans(osb, handle);
748 ocfs2_unblock_signals(&oldset);
749 out_unlock_inode:
750 ocfs2_inode_unlock(inode, 1);
751
752 out:
753 ocfs2_inode_unlock(dir, 1);
754
755 brelse(fe_bh);
756 brelse(parent_fe_bh);
757
758 ocfs2_free_dir_lookup_result(&lookup);
759
760 mlog_exit(err);
761
762 return err;
763 }
764
765 /*
766 * Takes and drops an exclusive lock on the given dentry. This will
767 * force other nodes to drop it.
768 */
769 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
770 {
771 int ret;
772
773 ret = ocfs2_dentry_lock(dentry, 1);
774 if (ret)
775 mlog_errno(ret);
776 else
777 ocfs2_dentry_unlock(dentry, 1);
778
779 return ret;
780 }
781
782 static inline int inode_is_unlinkable(struct inode *inode)
783 {
784 if (S_ISDIR(inode->i_mode)) {
785 if (inode->i_nlink == 2)
786 return 1;
787 return 0;
788 }
789
790 if (inode->i_nlink == 1)
791 return 1;
792 return 0;
793 }
794
795 static int ocfs2_unlink(struct inode *dir,
796 struct dentry *dentry)
797 {
798 int status;
799 int child_locked = 0;
800 struct inode *inode = dentry->d_inode;
801 struct inode *orphan_dir = NULL;
802 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
803 u64 blkno;
804 struct ocfs2_dinode *fe = NULL;
805 struct buffer_head *fe_bh = NULL;
806 struct buffer_head *parent_node_bh = NULL;
807 handle_t *handle = NULL;
808 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
809 struct ocfs2_dir_lookup_result lookup = { NULL, };
810 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
811
812 mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
813 dentry->d_name.len, dentry->d_name.name);
814
815 dquot_initialize(dir);
816
817 BUG_ON(dentry->d_parent->d_inode != dir);
818
819 mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno);
820
821 if (inode == osb->root_inode) {
822 mlog(0, "Cannot delete the root directory\n");
823 return -EPERM;
824 }
825
826 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
827 OI_LS_PARENT);
828 if (status < 0) {
829 if (status != -ENOENT)
830 mlog_errno(status);
831 return status;
832 }
833
834 status = ocfs2_find_files_on_disk(dentry->d_name.name,
835 dentry->d_name.len, &blkno, dir,
836 &lookup);
837 if (status < 0) {
838 if (status != -ENOENT)
839 mlog_errno(status);
840 goto leave;
841 }
842
843 if (OCFS2_I(inode)->ip_blkno != blkno) {
844 status = -ENOENT;
845
846 mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n",
847 (unsigned long long)OCFS2_I(inode)->ip_blkno,
848 (unsigned long long)blkno, OCFS2_I(inode)->ip_flags);
849 goto leave;
850 }
851
852 status = ocfs2_inode_lock(inode, &fe_bh, 1);
853 if (status < 0) {
854 if (status != -ENOENT)
855 mlog_errno(status);
856 goto leave;
857 }
858 child_locked = 1;
859
860 if (S_ISDIR(inode->i_mode)) {
861 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
862 status = -ENOTEMPTY;
863 goto leave;
864 }
865 }
866
867 status = ocfs2_remote_dentry_delete(dentry);
868 if (status < 0) {
869 /* This remote delete should succeed under all normal
870 * circumstances. */
871 mlog_errno(status);
872 goto leave;
873 }
874
875 if (inode_is_unlinkable(inode)) {
876 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
877 OCFS2_I(inode)->ip_blkno,
878 orphan_name, &orphan_insert);
879 if (status < 0) {
880 mlog_errno(status);
881 goto leave;
882 }
883 }
884
885 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
886 if (IS_ERR(handle)) {
887 status = PTR_ERR(handle);
888 handle = NULL;
889 mlog_errno(status);
890 goto leave;
891 }
892
893 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
894 OCFS2_JOURNAL_ACCESS_WRITE);
895 if (status < 0) {
896 mlog_errno(status);
897 goto leave;
898 }
899
900 fe = (struct ocfs2_dinode *) fe_bh->b_data;
901
902 if (inode_is_unlinkable(inode)) {
903 status = ocfs2_orphan_add(osb, handle, inode, fe_bh, orphan_name,
904 &orphan_insert, orphan_dir);
905 if (status < 0) {
906 mlog_errno(status);
907 goto leave;
908 }
909 }
910
911 /* delete the name from the parent dir */
912 status = ocfs2_delete_entry(handle, dir, &lookup);
913 if (status < 0) {
914 mlog_errno(status);
915 goto leave;
916 }
917
918 if (S_ISDIR(inode->i_mode))
919 drop_nlink(inode);
920 drop_nlink(inode);
921 ocfs2_set_links_count(fe, inode->i_nlink);
922 ocfs2_journal_dirty(handle, fe_bh);
923
924 dir->i_ctime = dir->i_mtime = CURRENT_TIME;
925 if (S_ISDIR(inode->i_mode))
926 drop_nlink(dir);
927
928 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
929 if (status < 0) {
930 mlog_errno(status);
931 if (S_ISDIR(inode->i_mode))
932 inc_nlink(dir);
933 }
934
935 leave:
936 if (handle)
937 ocfs2_commit_trans(osb, handle);
938
939 if (child_locked)
940 ocfs2_inode_unlock(inode, 1);
941
942 ocfs2_inode_unlock(dir, 1);
943
944 if (orphan_dir) {
945 /* This was locked for us in ocfs2_prepare_orphan_dir() */
946 ocfs2_inode_unlock(orphan_dir, 1);
947 mutex_unlock(&orphan_dir->i_mutex);
948 iput(orphan_dir);
949 }
950
951 brelse(fe_bh);
952 brelse(parent_node_bh);
953
954 ocfs2_free_dir_lookup_result(&orphan_insert);
955 ocfs2_free_dir_lookup_result(&lookup);
956
957 mlog_exit(status);
958
959 return status;
960 }
961
962 /*
963 * The only place this should be used is rename!
964 * if they have the same id, then the 1st one is the only one locked.
965 */
966 static int ocfs2_double_lock(struct ocfs2_super *osb,
967 struct buffer_head **bh1,
968 struct inode *inode1,
969 struct buffer_head **bh2,
970 struct inode *inode2)
971 {
972 int status;
973 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
974 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
975 struct buffer_head **tmpbh;
976 struct inode *tmpinode;
977
978 mlog_entry("(inode1 = %llu, inode2 = %llu)\n",
979 (unsigned long long)oi1->ip_blkno,
980 (unsigned long long)oi2->ip_blkno);
981
982 if (*bh1)
983 *bh1 = NULL;
984 if (*bh2)
985 *bh2 = NULL;
986
987 /* we always want to lock the one with the lower lockid first. */
988 if (oi1->ip_blkno != oi2->ip_blkno) {
989 if (oi1->ip_blkno < oi2->ip_blkno) {
990 /* switch id1 and id2 around */
991 mlog(0, "switching them around...\n");
992 tmpbh = bh2;
993 bh2 = bh1;
994 bh1 = tmpbh;
995
996 tmpinode = inode2;
997 inode2 = inode1;
998 inode1 = tmpinode;
999 }
1000 /* lock id2 */
1001 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1002 OI_LS_RENAME1);
1003 if (status < 0) {
1004 if (status != -ENOENT)
1005 mlog_errno(status);
1006 goto bail;
1007 }
1008 }
1009
1010 /* lock id1 */
1011 status = ocfs2_inode_lock_nested(inode1, bh1, 1, OI_LS_RENAME2);
1012 if (status < 0) {
1013 /*
1014 * An error return must mean that no cluster locks
1015 * were held on function exit.
1016 */
1017 if (oi1->ip_blkno != oi2->ip_blkno) {
1018 ocfs2_inode_unlock(inode2, 1);
1019 brelse(*bh2);
1020 *bh2 = NULL;
1021 }
1022
1023 if (status != -ENOENT)
1024 mlog_errno(status);
1025 }
1026
1027 bail:
1028 mlog_exit(status);
1029 return status;
1030 }
1031
1032 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1033 {
1034 ocfs2_inode_unlock(inode1, 1);
1035
1036 if (inode1 != inode2)
1037 ocfs2_inode_unlock(inode2, 1);
1038 }
1039
1040 static int ocfs2_rename(struct inode *old_dir,
1041 struct dentry *old_dentry,
1042 struct inode *new_dir,
1043 struct dentry *new_dentry)
1044 {
1045 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1046 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1047 struct inode *old_inode = old_dentry->d_inode;
1048 struct inode *new_inode = new_dentry->d_inode;
1049 struct inode *orphan_dir = NULL;
1050 struct ocfs2_dinode *newfe = NULL;
1051 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1052 struct buffer_head *newfe_bh = NULL;
1053 struct buffer_head *old_inode_bh = NULL;
1054 struct ocfs2_super *osb = NULL;
1055 u64 newfe_blkno, old_de_ino;
1056 handle_t *handle = NULL;
1057 struct buffer_head *old_dir_bh = NULL;
1058 struct buffer_head *new_dir_bh = NULL;
1059 nlink_t old_dir_nlink = old_dir->i_nlink;
1060 struct ocfs2_dinode *old_di;
1061 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1062 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1063 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1064 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1065 struct ocfs2_dir_lookup_result target_insert = { NULL, };
1066
1067 /* At some point it might be nice to break this function up a
1068 * bit. */
1069
1070 mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n",
1071 old_dir, old_dentry, new_dir, new_dentry,
1072 old_dentry->d_name.len, old_dentry->d_name.name,
1073 new_dentry->d_name.len, new_dentry->d_name.name);
1074
1075 dquot_initialize(old_dir);
1076 dquot_initialize(new_dir);
1077
1078 osb = OCFS2_SB(old_dir->i_sb);
1079
1080 if (new_inode) {
1081 if (!igrab(new_inode))
1082 BUG();
1083 }
1084
1085 /* Assume a directory hierarchy thusly:
1086 * a/b/c
1087 * a/d
1088 * a,b,c, and d are all directories.
1089 *
1090 * from cwd of 'a' on both nodes:
1091 * node1: mv b/c d
1092 * node2: mv d b/c
1093 *
1094 * And that's why, just like the VFS, we need a file system
1095 * rename lock. */
1096 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1097 status = ocfs2_rename_lock(osb);
1098 if (status < 0) {
1099 mlog_errno(status);
1100 goto bail;
1101 }
1102 rename_lock = 1;
1103 }
1104
1105 /* if old and new are the same, this'll just do one lock. */
1106 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1107 &new_dir_bh, new_dir);
1108 if (status < 0) {
1109 mlog_errno(status);
1110 goto bail;
1111 }
1112 parents_locked = 1;
1113
1114 /* make sure both dirs have bhs
1115 * get an extra ref on old_dir_bh if old==new */
1116 if (!new_dir_bh) {
1117 if (old_dir_bh) {
1118 new_dir_bh = old_dir_bh;
1119 get_bh(new_dir_bh);
1120 } else {
1121 mlog(ML_ERROR, "no old_dir_bh!\n");
1122 status = -EIO;
1123 goto bail;
1124 }
1125 }
1126
1127 /*
1128 * Aside from allowing a meta data update, the locking here
1129 * also ensures that the downconvert thread on other nodes
1130 * won't have to concurrently downconvert the inode and the
1131 * dentry locks.
1132 */
1133 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1134 OI_LS_PARENT);
1135 if (status < 0) {
1136 if (status != -ENOENT)
1137 mlog_errno(status);
1138 goto bail;
1139 }
1140 old_child_locked = 1;
1141
1142 status = ocfs2_remote_dentry_delete(old_dentry);
1143 if (status < 0) {
1144 mlog_errno(status);
1145 goto bail;
1146 }
1147
1148 if (S_ISDIR(old_inode->i_mode)) {
1149 u64 old_inode_parent;
1150
1151 update_dot_dot = 1;
1152 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1153 old_inode,
1154 &old_inode_dot_dot_res);
1155 if (status) {
1156 status = -EIO;
1157 goto bail;
1158 }
1159
1160 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1161 status = -EIO;
1162 goto bail;
1163 }
1164
1165 if (!new_inode && new_dir != old_dir &&
1166 new_dir->i_nlink >= ocfs2_link_max(osb)) {
1167 status = -EMLINK;
1168 goto bail;
1169 }
1170 }
1171
1172 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1173 old_dentry->d_name.len,
1174 &old_de_ino);
1175 if (status) {
1176 status = -ENOENT;
1177 goto bail;
1178 }
1179
1180 /*
1181 * Check for inode number is _not_ due to possible IO errors.
1182 * We might rmdir the source, keep it as pwd of some process
1183 * and merrily kill the link to whatever was created under the
1184 * same name. Goodbye sticky bit ;-<
1185 */
1186 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1187 status = -ENOENT;
1188 goto bail;
1189 }
1190
1191 /* check if the target already exists (in which case we need
1192 * to delete it */
1193 status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1194 new_dentry->d_name.len,
1195 &newfe_blkno, new_dir,
1196 &target_lookup_res);
1197 /* The only error we allow here is -ENOENT because the new
1198 * file not existing is perfectly valid. */
1199 if ((status < 0) && (status != -ENOENT)) {
1200 /* If we cannot find the file specified we should just */
1201 /* return the error... */
1202 mlog_errno(status);
1203 goto bail;
1204 }
1205 if (status == 0)
1206 target_exists = 1;
1207
1208 if (!target_exists && new_inode) {
1209 /*
1210 * Target was unlinked by another node while we were
1211 * waiting to get to ocfs2_rename(). There isn't
1212 * anything we can do here to help the situation, so
1213 * bubble up the appropriate error.
1214 */
1215 status = -ENOENT;
1216 goto bail;
1217 }
1218
1219 /* In case we need to overwrite an existing file, we blow it
1220 * away first */
1221 if (target_exists) {
1222 /* VFS didn't think there existed an inode here, but
1223 * someone else in the cluster must have raced our
1224 * rename to create one. Today we error cleanly, in
1225 * the future we should consider calling iget to build
1226 * a new struct inode for this entry. */
1227 if (!new_inode) {
1228 status = -EACCES;
1229
1230 mlog(0, "We found an inode for name %.*s but VFS "
1231 "didn't give us one.\n", new_dentry->d_name.len,
1232 new_dentry->d_name.name);
1233 goto bail;
1234 }
1235
1236 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1237 status = -EACCES;
1238
1239 mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n",
1240 (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1241 (unsigned long long)newfe_blkno,
1242 OCFS2_I(new_inode)->ip_flags);
1243 goto bail;
1244 }
1245
1246 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1247 if (status < 0) {
1248 if (status != -ENOENT)
1249 mlog_errno(status);
1250 goto bail;
1251 }
1252 new_child_locked = 1;
1253
1254 status = ocfs2_remote_dentry_delete(new_dentry);
1255 if (status < 0) {
1256 mlog_errno(status);
1257 goto bail;
1258 }
1259
1260 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1261
1262 mlog(0, "aha rename over existing... new_blkno=%llu "
1263 "newfebh=%p bhblocknr=%llu\n",
1264 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1265 (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1266
1267 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1268 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1269 OCFS2_I(new_inode)->ip_blkno,
1270 orphan_name, &orphan_insert);
1271 if (status < 0) {
1272 mlog_errno(status);
1273 goto bail;
1274 }
1275 }
1276 } else {
1277 BUG_ON(new_dentry->d_parent->d_inode != new_dir);
1278
1279 status = ocfs2_check_dir_for_entry(new_dir,
1280 new_dentry->d_name.name,
1281 new_dentry->d_name.len);
1282 if (status)
1283 goto bail;
1284
1285 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1286 new_dentry->d_name.name,
1287 new_dentry->d_name.len,
1288 &target_insert);
1289 if (status < 0) {
1290 mlog_errno(status);
1291 goto bail;
1292 }
1293 }
1294
1295 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1296 if (IS_ERR(handle)) {
1297 status = PTR_ERR(handle);
1298 handle = NULL;
1299 mlog_errno(status);
1300 goto bail;
1301 }
1302
1303 if (target_exists) {
1304 if (S_ISDIR(new_inode->i_mode)) {
1305 if (new_inode->i_nlink != 2 ||
1306 !ocfs2_empty_dir(new_inode)) {
1307 status = -ENOTEMPTY;
1308 goto bail;
1309 }
1310 }
1311 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1312 newfe_bh,
1313 OCFS2_JOURNAL_ACCESS_WRITE);
1314 if (status < 0) {
1315 mlog_errno(status);
1316 goto bail;
1317 }
1318
1319 if (S_ISDIR(new_inode->i_mode) ||
1320 (ocfs2_read_links_count(newfe) == 1)) {
1321 status = ocfs2_orphan_add(osb, handle, new_inode,
1322 newfe_bh, orphan_name,
1323 &orphan_insert, orphan_dir);
1324 if (status < 0) {
1325 mlog_errno(status);
1326 goto bail;
1327 }
1328 }
1329
1330 /* change the dirent to point to the correct inode */
1331 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1332 old_inode);
1333 if (status < 0) {
1334 mlog_errno(status);
1335 goto bail;
1336 }
1337 new_dir->i_version++;
1338
1339 if (S_ISDIR(new_inode->i_mode))
1340 ocfs2_set_links_count(newfe, 0);
1341 else
1342 ocfs2_add_links_count(newfe, -1);
1343 ocfs2_journal_dirty(handle, newfe_bh);
1344 } else {
1345 /* if the name was not found in new_dir, add it now */
1346 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1347 OCFS2_I(old_inode)->ip_blkno,
1348 new_dir_bh, &target_insert);
1349 }
1350
1351 old_inode->i_ctime = CURRENT_TIME;
1352 mark_inode_dirty(old_inode);
1353
1354 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1355 old_inode_bh,
1356 OCFS2_JOURNAL_ACCESS_WRITE);
1357 if (status >= 0) {
1358 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1359
1360 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1361 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1362 ocfs2_journal_dirty(handle, old_inode_bh);
1363 } else
1364 mlog_errno(status);
1365
1366 /*
1367 * Now that the name has been added to new_dir, remove the old name.
1368 *
1369 * We don't keep any directory entry context around until now
1370 * because the insert might have changed the type of directory
1371 * we're dealing with.
1372 */
1373 status = ocfs2_find_entry(old_dentry->d_name.name,
1374 old_dentry->d_name.len, old_dir,
1375 &old_entry_lookup);
1376 if (status)
1377 goto bail;
1378
1379 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1380 if (status < 0) {
1381 mlog_errno(status);
1382 goto bail;
1383 }
1384
1385 if (new_inode) {
1386 new_inode->i_nlink--;
1387 new_inode->i_ctime = CURRENT_TIME;
1388 }
1389 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1390
1391 if (update_dot_dot) {
1392 status = ocfs2_update_entry(old_inode, handle,
1393 &old_inode_dot_dot_res, new_dir);
1394 old_dir->i_nlink--;
1395 if (new_inode) {
1396 new_inode->i_nlink--;
1397 } else {
1398 inc_nlink(new_dir);
1399 mark_inode_dirty(new_dir);
1400 }
1401 }
1402 mark_inode_dirty(old_dir);
1403 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1404 if (new_inode) {
1405 mark_inode_dirty(new_inode);
1406 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1407 }
1408
1409 if (old_dir != new_dir) {
1410 /* Keep the same times on both directories.*/
1411 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1412
1413 /*
1414 * This will also pick up the i_nlink change from the
1415 * block above.
1416 */
1417 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1418 }
1419
1420 if (old_dir_nlink != old_dir->i_nlink) {
1421 if (!old_dir_bh) {
1422 mlog(ML_ERROR, "need to change nlink for old dir "
1423 "%llu from %d to %d but bh is NULL!\n",
1424 (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1425 (int)old_dir_nlink, old_dir->i_nlink);
1426 } else {
1427 struct ocfs2_dinode *fe;
1428 status = ocfs2_journal_access_di(handle,
1429 INODE_CACHE(old_dir),
1430 old_dir_bh,
1431 OCFS2_JOURNAL_ACCESS_WRITE);
1432 fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1433 ocfs2_set_links_count(fe, old_dir->i_nlink);
1434 ocfs2_journal_dirty(handle, old_dir_bh);
1435 }
1436 }
1437 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1438 status = 0;
1439 bail:
1440 if (rename_lock)
1441 ocfs2_rename_unlock(osb);
1442
1443 if (handle)
1444 ocfs2_commit_trans(osb, handle);
1445
1446 if (parents_locked)
1447 ocfs2_double_unlock(old_dir, new_dir);
1448
1449 if (old_child_locked)
1450 ocfs2_inode_unlock(old_inode, 1);
1451
1452 if (new_child_locked)
1453 ocfs2_inode_unlock(new_inode, 1);
1454
1455 if (orphan_dir) {
1456 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1457 ocfs2_inode_unlock(orphan_dir, 1);
1458 mutex_unlock(&orphan_dir->i_mutex);
1459 iput(orphan_dir);
1460 }
1461
1462 if (new_inode)
1463 sync_mapping_buffers(old_inode->i_mapping);
1464
1465 if (new_inode)
1466 iput(new_inode);
1467
1468 ocfs2_free_dir_lookup_result(&target_lookup_res);
1469 ocfs2_free_dir_lookup_result(&old_entry_lookup);
1470 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1471 ocfs2_free_dir_lookup_result(&orphan_insert);
1472 ocfs2_free_dir_lookup_result(&target_insert);
1473
1474 brelse(newfe_bh);
1475 brelse(old_inode_bh);
1476 brelse(old_dir_bh);
1477 brelse(new_dir_bh);
1478
1479 mlog_exit(status);
1480
1481 return status;
1482 }
1483
1484 /*
1485 * we expect i_size = strlen(symname). Copy symname into the file
1486 * data, including the null terminator.
1487 */
1488 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1489 handle_t *handle,
1490 struct inode *inode,
1491 const char *symname)
1492 {
1493 struct buffer_head **bhs = NULL;
1494 const char *c;
1495 struct super_block *sb = osb->sb;
1496 u64 p_blkno, p_blocks;
1497 int virtual, blocks, status, i, bytes_left;
1498
1499 bytes_left = i_size_read(inode) + 1;
1500 /* we can't trust i_blocks because we're actually going to
1501 * write i_size + 1 bytes. */
1502 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1503
1504 mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n",
1505 (unsigned long long)inode->i_blocks,
1506 i_size_read(inode), blocks);
1507
1508 /* Sanity check -- make sure we're going to fit. */
1509 if (bytes_left >
1510 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1511 status = -EIO;
1512 mlog_errno(status);
1513 goto bail;
1514 }
1515
1516 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1517 if (!bhs) {
1518 status = -ENOMEM;
1519 mlog_errno(status);
1520 goto bail;
1521 }
1522
1523 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1524 NULL);
1525 if (status < 0) {
1526 mlog_errno(status);
1527 goto bail;
1528 }
1529
1530 /* links can never be larger than one cluster so we know this
1531 * is all going to be contiguous, but do a sanity check
1532 * anyway. */
1533 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1534 status = -EIO;
1535 mlog_errno(status);
1536 goto bail;
1537 }
1538
1539 virtual = 0;
1540 while(bytes_left > 0) {
1541 c = &symname[virtual * sb->s_blocksize];
1542
1543 bhs[virtual] = sb_getblk(sb, p_blkno);
1544 if (!bhs[virtual]) {
1545 status = -ENOMEM;
1546 mlog_errno(status);
1547 goto bail;
1548 }
1549 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1550 bhs[virtual]);
1551
1552 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1553 bhs[virtual],
1554 OCFS2_JOURNAL_ACCESS_CREATE);
1555 if (status < 0) {
1556 mlog_errno(status);
1557 goto bail;
1558 }
1559
1560 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1561
1562 memcpy(bhs[virtual]->b_data, c,
1563 (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1564 bytes_left);
1565
1566 ocfs2_journal_dirty(handle, bhs[virtual]);
1567
1568 virtual++;
1569 p_blkno++;
1570 bytes_left -= sb->s_blocksize;
1571 }
1572
1573 status = 0;
1574 bail:
1575
1576 if (bhs) {
1577 for(i = 0; i < blocks; i++)
1578 brelse(bhs[i]);
1579 kfree(bhs);
1580 }
1581
1582 mlog_exit(status);
1583 return status;
1584 }
1585
1586 static int ocfs2_symlink(struct inode *dir,
1587 struct dentry *dentry,
1588 const char *symname)
1589 {
1590 int status, l, credits;
1591 u64 newsize;
1592 struct ocfs2_super *osb = NULL;
1593 struct inode *inode = NULL;
1594 struct super_block *sb;
1595 struct buffer_head *new_fe_bh = NULL;
1596 struct buffer_head *parent_fe_bh = NULL;
1597 struct ocfs2_dinode *fe = NULL;
1598 struct ocfs2_dinode *dirfe;
1599 handle_t *handle = NULL;
1600 struct ocfs2_alloc_context *inode_ac = NULL;
1601 struct ocfs2_alloc_context *data_ac = NULL;
1602 struct ocfs2_alloc_context *xattr_ac = NULL;
1603 int want_clusters = 0;
1604 int xattr_credits = 0;
1605 struct ocfs2_security_xattr_info si = {
1606 .enable = 1,
1607 };
1608 int did_quota = 0, did_quota_inode = 0;
1609 struct ocfs2_dir_lookup_result lookup = { NULL, };
1610 sigset_t oldset;
1611 int did_block_signals = 0;
1612
1613 mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir,
1614 dentry, symname, dentry->d_name.len, dentry->d_name.name);
1615
1616 dquot_initialize(dir);
1617
1618 sb = dir->i_sb;
1619 osb = OCFS2_SB(sb);
1620
1621 l = strlen(symname) + 1;
1622
1623 credits = ocfs2_calc_symlink_credits(sb);
1624
1625 /* lock the parent directory */
1626 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1627 if (status < 0) {
1628 if (status != -ENOENT)
1629 mlog_errno(status);
1630 return status;
1631 }
1632
1633 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1634 if (!ocfs2_read_links_count(dirfe)) {
1635 /* can't make a file in a deleted directory. */
1636 status = -ENOENT;
1637 goto bail;
1638 }
1639
1640 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1641 dentry->d_name.len);
1642 if (status)
1643 goto bail;
1644
1645 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1646 dentry->d_name.name,
1647 dentry->d_name.len, &lookup);
1648 if (status < 0) {
1649 mlog_errno(status);
1650 goto bail;
1651 }
1652
1653 status = ocfs2_reserve_new_inode(osb, &inode_ac);
1654 if (status < 0) {
1655 if (status != -ENOSPC)
1656 mlog_errno(status);
1657 goto bail;
1658 }
1659
1660 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1661 if (!inode) {
1662 status = -ENOMEM;
1663 mlog_errno(status);
1664 goto bail;
1665 }
1666
1667 /* get security xattr */
1668 status = ocfs2_init_security_get(inode, dir, &si);
1669 if (status) {
1670 if (status == -EOPNOTSUPP)
1671 si.enable = 0;
1672 else {
1673 mlog_errno(status);
1674 goto bail;
1675 }
1676 }
1677
1678 /* calculate meta data/clusters for setting security xattr */
1679 if (si.enable) {
1680 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1681 &xattr_credits, &xattr_ac);
1682 if (status < 0) {
1683 mlog_errno(status);
1684 goto bail;
1685 }
1686 }
1687
1688 /* don't reserve bitmap space for fast symlinks. */
1689 if (l > ocfs2_fast_symlink_chars(sb))
1690 want_clusters += 1;
1691
1692 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1693 if (status < 0) {
1694 if (status != -ENOSPC)
1695 mlog_errno(status);
1696 goto bail;
1697 }
1698
1699 handle = ocfs2_start_trans(osb, credits + xattr_credits);
1700 if (IS_ERR(handle)) {
1701 status = PTR_ERR(handle);
1702 handle = NULL;
1703 mlog_errno(status);
1704 goto bail;
1705 }
1706
1707 /* Starting to change things, restart is no longer possible. */
1708 ocfs2_block_signals(&oldset);
1709 did_block_signals = 1;
1710
1711 status = dquot_alloc_inode(inode);
1712 if (status)
1713 goto bail;
1714 did_quota_inode = 1;
1715
1716 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry,
1717 inode->i_mode, dentry->d_name.len,
1718 dentry->d_name.name);
1719
1720 status = ocfs2_mknod_locked(osb, dir, inode,
1721 0, &new_fe_bh, parent_fe_bh, handle,
1722 inode_ac);
1723 if (status < 0) {
1724 mlog_errno(status);
1725 goto bail;
1726 }
1727
1728 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1729 inode->i_rdev = 0;
1730 newsize = l - 1;
1731 if (l > ocfs2_fast_symlink_chars(sb)) {
1732 u32 offset = 0;
1733
1734 inode->i_op = &ocfs2_symlink_inode_operations;
1735 status = dquot_alloc_space_nodirty(inode,
1736 ocfs2_clusters_to_bytes(osb->sb, 1));
1737 if (status)
1738 goto bail;
1739 did_quota = 1;
1740 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1741 new_fe_bh,
1742 handle, data_ac, NULL,
1743 NULL);
1744 if (status < 0) {
1745 if (status != -ENOSPC && status != -EINTR) {
1746 mlog(ML_ERROR,
1747 "Failed to extend file to %llu\n",
1748 (unsigned long long)newsize);
1749 mlog_errno(status);
1750 status = -ENOSPC;
1751 }
1752 goto bail;
1753 }
1754 i_size_write(inode, newsize);
1755 inode->i_blocks = ocfs2_inode_sector_count(inode);
1756 } else {
1757 inode->i_op = &ocfs2_fast_symlink_inode_operations;
1758 memcpy((char *) fe->id2.i_symlink, symname, l);
1759 i_size_write(inode, newsize);
1760 inode->i_blocks = 0;
1761 }
1762
1763 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1764 if (status < 0) {
1765 mlog_errno(status);
1766 goto bail;
1767 }
1768
1769 if (!ocfs2_inode_is_fast_symlink(inode)) {
1770 status = ocfs2_create_symlink_data(osb, handle, inode,
1771 symname);
1772 if (status < 0) {
1773 mlog_errno(status);
1774 goto bail;
1775 }
1776 }
1777
1778 if (si.enable) {
1779 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1780 xattr_ac, data_ac);
1781 if (status < 0) {
1782 mlog_errno(status);
1783 goto bail;
1784 }
1785 }
1786
1787 /*
1788 * Do this before adding the entry to the directory. We add
1789 * also set d_op after success so that ->d_iput() will cleanup
1790 * the dentry lock even if ocfs2_add_entry() fails below.
1791 */
1792 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1793 if (status) {
1794 mlog_errno(status);
1795 goto bail;
1796 }
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 d_instantiate(dentry, inode);
2462 status = 0;
2463 out_commit:
2464 ocfs2_commit_trans(osb, handle);
2465 orphan_unlock:
2466 ocfs2_inode_unlock(orphan_dir_inode, 1);
2467 mutex_unlock(&orphan_dir_inode->i_mutex);
2468 iput(orphan_dir_inode);
2469 leave:
2470
2471 ocfs2_inode_unlock(dir, 1);
2472
2473 brelse(di_bh);
2474 brelse(parent_di_bh);
2475 brelse(orphan_dir_bh);
2476
2477 ocfs2_free_dir_lookup_result(&lookup);
2478
2479 mlog_exit(status);
2480
2481 return status;
2482 }
2483
2484 const struct inode_operations ocfs2_dir_iops = {
2485 .create = ocfs2_create,
2486 .lookup = ocfs2_lookup,
2487 .link = ocfs2_link,
2488 .unlink = ocfs2_unlink,
2489 .rmdir = ocfs2_unlink,
2490 .symlink = ocfs2_symlink,
2491 .mkdir = ocfs2_mkdir,
2492 .mknod = ocfs2_mknod,
2493 .rename = ocfs2_rename,
2494 .setattr = ocfs2_setattr,
2495 .getattr = ocfs2_getattr,
2496 .permission = ocfs2_permission,
2497 .setxattr = generic_setxattr,
2498 .getxattr = generic_getxattr,
2499 .listxattr = ocfs2_listxattr,
2500 .removexattr = generic_removexattr,
2501 .fiemap = ocfs2_fiemap,
2502 };
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree