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USB: io_ti: check firmware version before updating
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / ocfs2 / namei.c
blob4cbb18f26c5fadc4f9f2eff9f07f9341116df5d0
1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * namei.c
5 *
6 * Create and rename file, directory, symlinks
7 *
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
9 *
10 * Portions of this code from linux/fs/ext3/dir.c
11 *
12 * Copyright (C) 1992, 1993, 1994, 1995
13 * Remy Card (card@masi.ibp.fr)
14 * Laboratoire MASI - Institut Blaise pascal
15 * Universite Pierre et Marie Curie (Paris VI)
16 *
17 * from
18 *
19 * linux/fs/minix/dir.c
20 *
21 * Copyright (C) 1991, 1992 Linux Torvalds
22 *
23 * This program is free software; you can redistribute it and/or
24 * modify it under the terms of the GNU General Public
25 * License as published by the Free Software Foundation; either
26 * version 2 of the License, or (at your option) any later version.
27 *
28 * This program is distributed in the hope that it will be useful,
29 * but WITHOUT ANY WARRANTY; without even the implied warranty of
30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
31 * General Public License for more details.
32 *
33 * You should have received a copy of the GNU General Public
34 * License along with this program; if not, write to the
35 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
36 * Boston, MA 021110-1307, USA.
37 */
38
39 #include <linux/fs.h>
40 #include <linux/types.h>
41 #include <linux/slab.h>
42 #include <linux/highmem.h>
43 #include <linux/quotaops.h>
44
45 #define MLOG_MASK_PREFIX ML_NAMEI
46 #include <cluster/masklog.h>
47
48 #include "ocfs2.h"
49
50 #include "alloc.h"
51 #include "dcache.h"
52 #include "dir.h"
53 #include "dlmglue.h"
54 #include "extent_map.h"
55 #include "file.h"
56 #include "inode.h"
57 #include "journal.h"
58 #include "namei.h"
59 #include "suballoc.h"
60 #include "super.h"
61 #include "symlink.h"
62 #include "sysfile.h"
63 #include "uptodate.h"
64 #include "xattr.h"
65 #include "acl.h"
66
67 #include "buffer_head_io.h"
68
69 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
70 struct inode *dir,
71 struct inode *inode,
72 dev_t dev,
73 struct buffer_head **new_fe_bh,
74 struct buffer_head *parent_fe_bh,
75 handle_t *handle,
76 struct ocfs2_alloc_context *inode_ac);
77
78 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
79 struct inode **ret_orphan_dir,
80 u64 blkno,
81 char *name,
82 struct ocfs2_dir_lookup_result *lookup);
83
84 static int ocfs2_orphan_add(struct ocfs2_super *osb,
85 handle_t *handle,
86 struct inode *inode,
87 struct buffer_head *fe_bh,
88 char *name,
89 struct ocfs2_dir_lookup_result *lookup,
90 struct inode *orphan_dir_inode);
91
92 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
93 handle_t *handle,
94 struct inode *inode,
95 const char *symname);
96
97 /* An orphan dir name is an 8 byte value, printed as a hex string */
98 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
99
100 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
101 struct nameidata *nd)
102 {
103 int status;
104 u64 blkno;
105 struct inode *inode = NULL;
106 struct dentry *ret;
107 struct ocfs2_inode_info *oi;
108
109 mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
110 dentry->d_name.len, dentry->d_name.name);
111
112 if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
113 ret = ERR_PTR(-ENAMETOOLONG);
114 goto bail;
115 }
116
117 mlog(0, "find name %.*s in directory %llu\n", dentry->d_name.len,
118 dentry->d_name.name, (unsigned long long)OCFS2_I(dir)->ip_blkno);
119
120 status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
121 if (status < 0) {
122 if (status != -ENOENT)
123 mlog_errno(status);
124 ret = ERR_PTR(status);
125 goto bail;
126 }
127
128 status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
129 dentry->d_name.len, &blkno);
130 if (status < 0)
131 goto bail_add;
132
133 inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
134 if (IS_ERR(inode)) {
135 ret = ERR_PTR(-EACCES);
136 goto bail_unlock;
137 }
138
139 oi = OCFS2_I(inode);
140 /* Clear any orphaned state... If we were able to look up the
141 * inode from a directory, it certainly can't be orphaned. We
142 * might have the bad state from a node which intended to
143 * orphan this inode but crashed before it could commit the
144 * unlink. */
145 spin_lock(&oi->ip_lock);
146 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
147 spin_unlock(&oi->ip_lock);
148
149 bail_add:
150 dentry->d_op = &ocfs2_dentry_ops;
151 ret = d_splice_alias(inode, dentry);
152
153 if (inode) {
154 /*
155 * If d_splice_alias() finds a DCACHE_DISCONNECTED
156 * dentry, it will d_move() it on top of ourse. The
157 * return value will indicate this however, so in
158 * those cases, we switch them around for the locking
159 * code.
160 *
161 * NOTE: This dentry already has ->d_op set from
162 * ocfs2_get_parent() and ocfs2_get_dentry()
163 */
164 if (ret)
165 dentry = ret;
166
167 status = ocfs2_dentry_attach_lock(dentry, inode,
168 OCFS2_I(dir)->ip_blkno);
169 if (status) {
170 mlog_errno(status);
171 ret = ERR_PTR(status);
172 goto bail_unlock;
173 }
174 }
175
176 bail_unlock:
177 /* Don't drop the cluster lock until *after* the d_add --
178 * unlink on another node will message us to remove that
179 * dentry under this lock so otherwise we can race this with
180 * the downconvert thread and have a stale dentry. */
181 ocfs2_inode_unlock(dir, 0);
182
183 bail:
184
185 mlog_exit_ptr(ret);
186
187 return ret;
188 }
189
190 static struct inode *ocfs2_get_init_inode(struct inode *dir, int mode)
191 {
192 struct inode *inode;
193
194 inode = new_inode(dir->i_sb);
195 if (!inode) {
196 mlog(ML_ERROR, "new_inode failed!\n");
197 return NULL;
198 }
199
200 /* populate as many fields early on as possible - many of
201 * these are used by the support functions here and in
202 * callers. */
203 if (S_ISDIR(mode))
204 inode->i_nlink = 2;
205 else
206 inode->i_nlink = 1;
207 inode->i_uid = current_fsuid();
208 if (dir->i_mode & S_ISGID) {
209 inode->i_gid = dir->i_gid;
210 if (S_ISDIR(mode))
211 mode |= S_ISGID;
212 } else
213 inode->i_gid = current_fsgid();
214 inode->i_mode = mode;
215 dquot_initialize(inode);
216 return inode;
217 }
218
219 static int ocfs2_mknod(struct inode *dir,
220 struct dentry *dentry,
221 int mode,
222 dev_t dev)
223 {
224 int status = 0;
225 struct buffer_head *parent_fe_bh = NULL;
226 handle_t *handle = NULL;
227 struct ocfs2_super *osb;
228 struct ocfs2_dinode *dirfe;
229 struct buffer_head *new_fe_bh = NULL;
230 struct inode *inode = NULL;
231 struct ocfs2_alloc_context *inode_ac = NULL;
232 struct ocfs2_alloc_context *data_ac = NULL;
233 struct ocfs2_alloc_context *meta_ac = NULL;
234 int want_clusters = 0;
235 int want_meta = 0;
236 int xattr_credits = 0;
237 struct ocfs2_security_xattr_info si = {
238 .enable = 1,
239 };
240 int did_quota_inode = 0;
241 struct ocfs2_dir_lookup_result lookup = { NULL, };
242
243 mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode,
244 (unsigned long)dev, dentry->d_name.len,
245 dentry->d_name.name);
246
247 dquot_initialize(dir);
248
249 /* get our super block */
250 osb = OCFS2_SB(dir->i_sb);
251
252 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
253 if (status < 0) {
254 if (status != -ENOENT)
255 mlog_errno(status);
256 return status;
257 }
258
259 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
260 status = -EMLINK;
261 goto leave;
262 }
263
264 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
265 if (!ocfs2_read_links_count(dirfe)) {
266 /* can't make a file in a deleted directory. */
267 status = -ENOENT;
268 goto leave;
269 }
270
271 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
272 dentry->d_name.len);
273 if (status)
274 goto leave;
275
276 /* get a spot inside the dir. */
277 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
278 dentry->d_name.name,
279 dentry->d_name.len, &lookup);
280 if (status < 0) {
281 mlog_errno(status);
282 goto leave;
283 }
284
285 /* reserve an inode spot */
286 status = ocfs2_reserve_new_inode(osb, &inode_ac);
287 if (status < 0) {
288 if (status != -ENOSPC)
289 mlog_errno(status);
290 goto leave;
291 }
292
293 inode = ocfs2_get_init_inode(dir, mode);
294 if (!inode) {
295 status = -ENOMEM;
296 mlog_errno(status);
297 goto leave;
298 }
299
300 /* get security xattr */
301 status = ocfs2_init_security_get(inode, dir, &si);
302 if (status) {
303 if (status == -EOPNOTSUPP)
304 si.enable = 0;
305 else {
306 mlog_errno(status);
307 goto leave;
308 }
309 }
310
311 /* calculate meta data/clusters for setting security and acl xattr */
312 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
313 &si, &want_clusters,
314 &xattr_credits, &want_meta);
315 if (status < 0) {
316 mlog_errno(status);
317 goto leave;
318 }
319
320 /* Reserve a cluster if creating an extent based directory. */
321 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
322 want_clusters += 1;
323
324 /* Dir indexing requires extra space as well */
325 if (ocfs2_supports_indexed_dirs(osb))
326 want_meta++;
327 }
328
329 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
330 if (status < 0) {
331 if (status != -ENOSPC)
332 mlog_errno(status);
333 goto leave;
334 }
335
336 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
337 if (status < 0) {
338 if (status != -ENOSPC)
339 mlog_errno(status);
340 goto leave;
341 }
342
343 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
344 S_ISDIR(mode),
345 xattr_credits));
346 if (IS_ERR(handle)) {
347 status = PTR_ERR(handle);
348 handle = NULL;
349 mlog_errno(status);
350 goto leave;
351 }
352
353 status = dquot_alloc_inode(inode);
354 if (status)
355 goto leave;
356 did_quota_inode = 1;
357
358 mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry,
359 inode->i_mode, (unsigned long)dev, dentry->d_name.len,
360 dentry->d_name.name);
361
362 /* do the real work now. */
363 status = ocfs2_mknod_locked(osb, dir, inode, dev,
364 &new_fe_bh, parent_fe_bh, handle,
365 inode_ac);
366 if (status < 0) {
367 mlog_errno(status);
368 goto leave;
369 }
370
371 if (S_ISDIR(mode)) {
372 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
373 new_fe_bh, data_ac, meta_ac);
374 if (status < 0) {
375 mlog_errno(status);
376 goto leave;
377 }
378
379 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
380 parent_fe_bh,
381 OCFS2_JOURNAL_ACCESS_WRITE);
382 if (status < 0) {
383 mlog_errno(status);
384 goto leave;
385 }
386 ocfs2_add_links_count(dirfe, 1);
387 status = ocfs2_journal_dirty(handle, parent_fe_bh);
388 if (status < 0) {
389 mlog_errno(status);
390 goto leave;
391 }
392 inc_nlink(dir);
393 }
394
395 status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
396 meta_ac, data_ac);
397 if (status < 0) {
398 mlog_errno(status);
399 goto leave;
400 }
401
402 if (si.enable) {
403 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
404 meta_ac, data_ac);
405 if (status < 0) {
406 mlog_errno(status);
407 goto leave;
408 }
409 }
410
411 /*
412 * Do this before adding the entry to the directory. We add
413 * also set d_op after success so that ->d_iput() will cleanup
414 * the dentry lock even if ocfs2_add_entry() fails below.
415 */
416 status = ocfs2_dentry_attach_lock(dentry, inode,
417 OCFS2_I(dir)->ip_blkno);
418 if (status) {
419 mlog_errno(status);
420 goto leave;
421 }
422 dentry->d_op = &ocfs2_dentry_ops;
423
424 status = ocfs2_add_entry(handle, dentry, inode,
425 OCFS2_I(inode)->ip_blkno, parent_fe_bh,
426 &lookup);
427 if (status < 0) {
428 mlog_errno(status);
429 goto leave;
430 }
431
432 insert_inode_hash(inode);
433 d_instantiate(dentry, inode);
434 status = 0;
435 leave:
436 if (status < 0 && did_quota_inode)
437 dquot_free_inode(inode);
438 if (handle)
439 ocfs2_commit_trans(osb, handle);
440
441 ocfs2_inode_unlock(dir, 1);
442
443 if (status == -ENOSPC)
444 mlog(0, "Disk is full\n");
445
446 brelse(new_fe_bh);
447 brelse(parent_fe_bh);
448 kfree(si.name);
449 kfree(si.value);
450
451 ocfs2_free_dir_lookup_result(&lookup);
452
453 if (inode_ac)
454 ocfs2_free_alloc_context(inode_ac);
455
456 if (data_ac)
457 ocfs2_free_alloc_context(data_ac);
458
459 if (meta_ac)
460 ocfs2_free_alloc_context(meta_ac);
461
462 /*
463 * We should call iput after the i_mutex of the bitmap been
464 * unlocked in ocfs2_free_alloc_context, or the
465 * ocfs2_delete_inode will mutex_lock again.
466 */
467 if ((status < 0) && inode) {
468 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
469 clear_nlink(inode);
470 iput(inode);
471 }
472
473 mlog_exit(status);
474
475 return status;
476 }
477
478 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
479 struct inode *dir,
480 struct inode *inode,
481 dev_t dev,
482 struct buffer_head **new_fe_bh,
483 struct buffer_head *parent_fe_bh,
484 handle_t *handle,
485 struct ocfs2_alloc_context *inode_ac)
486 {
487 int status = 0;
488 struct ocfs2_dinode *fe = NULL;
489 struct ocfs2_extent_list *fel;
490 u64 fe_blkno = 0;
491 u16 suballoc_bit;
492 u16 feat;
493
494 *new_fe_bh = NULL;
495
496 status = ocfs2_claim_new_inode(osb, handle, dir, parent_fe_bh,
497 inode_ac, &suballoc_bit, &fe_blkno);
498 if (status < 0) {
499 mlog_errno(status);
500 goto leave;
501 }
502
503 /* populate as many fields early on as possible - many of
504 * these are used by the support functions here and in
505 * callers. */
506 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
507 OCFS2_I(inode)->ip_blkno = fe_blkno;
508 spin_lock(&osb->osb_lock);
509 inode->i_generation = osb->s_next_generation++;
510 spin_unlock(&osb->osb_lock);
511
512 *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
513 if (!*new_fe_bh) {
514 status = -EIO;
515 mlog_errno(status);
516 goto leave;
517 }
518 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
519
520 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
521 *new_fe_bh,
522 OCFS2_JOURNAL_ACCESS_CREATE);
523 if (status < 0) {
524 mlog_errno(status);
525 goto leave;
526 }
527
528 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
529 memset(fe, 0, osb->sb->s_blocksize);
530
531 fe->i_generation = cpu_to_le32(inode->i_generation);
532 fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
533 fe->i_blkno = cpu_to_le64(fe_blkno);
534 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
535 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
536 fe->i_uid = cpu_to_le32(inode->i_uid);
537 fe->i_gid = cpu_to_le32(inode->i_gid);
538 fe->i_mode = cpu_to_le16(inode->i_mode);
539 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
540 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
541
542 ocfs2_set_links_count(fe, inode->i_nlink);
543
544 fe->i_last_eb_blk = 0;
545 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
546 le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL);
547 fe->i_atime = fe->i_ctime = fe->i_mtime =
548 cpu_to_le64(CURRENT_TIME.tv_sec);
549 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
550 cpu_to_le32(CURRENT_TIME.tv_nsec);
551 fe->i_dtime = 0;
552
553 /*
554 * If supported, directories start with inline data. If inline
555 * isn't supported, but indexing is, we start them as indexed.
556 */
557 feat = le16_to_cpu(fe->i_dyn_features);
558 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
559 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
560
561 fe->id2.i_data.id_count = cpu_to_le16(
562 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
563 } else {
564 fel = &fe->id2.i_list;
565 fel->l_tree_depth = 0;
566 fel->l_next_free_rec = 0;
567 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
568 }
569
570 status = ocfs2_journal_dirty(handle, *new_fe_bh);
571 if (status < 0) {
572 mlog_errno(status);
573 goto leave;
574 }
575
576 ocfs2_populate_inode(inode, fe, 1);
577 ocfs2_ci_set_new(osb, INODE_CACHE(inode));
578 if (!ocfs2_mount_local(osb)) {
579 status = ocfs2_create_new_inode_locks(inode);
580 if (status < 0)
581 mlog_errno(status);
582 }
583
584 status = 0; /* error in ocfs2_create_new_inode_locks is not
585 * critical */
586
587 leave:
588 if (status < 0) {
589 if (*new_fe_bh) {
590 brelse(*new_fe_bh);
591 *new_fe_bh = NULL;
592 }
593 }
594
595 mlog_exit(status);
596 return status;
597 }
598
599 static int ocfs2_mkdir(struct inode *dir,
600 struct dentry *dentry,
601 int mode)
602 {
603 int ret;
604
605 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
606 dentry->d_name.len, dentry->d_name.name);
607 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
608 mlog_exit(ret);
609
610 return ret;
611 }
612
613 static int ocfs2_create(struct inode *dir,
614 struct dentry *dentry,
615 int mode,
616 struct nameidata *nd)
617 {
618 int ret;
619
620 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
621 dentry->d_name.len, dentry->d_name.name);
622 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
623 mlog_exit(ret);
624
625 return ret;
626 }
627
628 static int ocfs2_link(struct dentry *old_dentry,
629 struct inode *dir,
630 struct dentry *dentry)
631 {
632 handle_t *handle;
633 struct inode *inode = old_dentry->d_inode;
634 int err;
635 struct buffer_head *fe_bh = NULL;
636 struct buffer_head *parent_fe_bh = NULL;
637 struct ocfs2_dinode *fe = NULL;
638 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
639 struct ocfs2_dir_lookup_result lookup = { NULL, };
640
641 mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino,
642 old_dentry->d_name.len, old_dentry->d_name.name,
643 dentry->d_name.len, dentry->d_name.name);
644
645 if (S_ISDIR(inode->i_mode))
646 return -EPERM;
647
648 dquot_initialize(dir);
649
650 err = ocfs2_inode_lock_nested(dir, &parent_fe_bh, 1, OI_LS_PARENT);
651 if (err < 0) {
652 if (err != -ENOENT)
653 mlog_errno(err);
654 return err;
655 }
656
657 if (!dir->i_nlink) {
658 err = -ENOENT;
659 goto out;
660 }
661
662 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
663 dentry->d_name.len);
664 if (err)
665 goto out;
666
667 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
668 dentry->d_name.name,
669 dentry->d_name.len, &lookup);
670 if (err < 0) {
671 mlog_errno(err);
672 goto out;
673 }
674
675 err = ocfs2_inode_lock(inode, &fe_bh, 1);
676 if (err < 0) {
677 if (err != -ENOENT)
678 mlog_errno(err);
679 goto out;
680 }
681
682 fe = (struct ocfs2_dinode *) fe_bh->b_data;
683 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
684 err = -EMLINK;
685 goto out_unlock_inode;
686 }
687
688 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
689 if (IS_ERR(handle)) {
690 err = PTR_ERR(handle);
691 handle = NULL;
692 mlog_errno(err);
693 goto out_unlock_inode;
694 }
695
696 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
697 OCFS2_JOURNAL_ACCESS_WRITE);
698 if (err < 0) {
699 mlog_errno(err);
700 goto out_commit;
701 }
702
703 inc_nlink(inode);
704 inode->i_ctime = CURRENT_TIME;
705 ocfs2_set_links_count(fe, inode->i_nlink);
706 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
707 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
708
709 err = ocfs2_journal_dirty(handle, fe_bh);
710 if (err < 0) {
711 ocfs2_add_links_count(fe, -1);
712 drop_nlink(inode);
713 mlog_errno(err);
714 goto out_commit;
715 }
716
717 err = ocfs2_add_entry(handle, dentry, inode,
718 OCFS2_I(inode)->ip_blkno,
719 parent_fe_bh, &lookup);
720 if (err) {
721 ocfs2_add_links_count(fe, -1);
722 drop_nlink(inode);
723 mlog_errno(err);
724 goto out_commit;
725 }
726
727 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
728 if (err) {
729 mlog_errno(err);
730 goto out_commit;
731 }
732
733 atomic_inc(&inode->i_count);
734 dentry->d_op = &ocfs2_dentry_ops;
735 d_instantiate(dentry, inode);
736
737 out_commit:
738 ocfs2_commit_trans(osb, handle);
739 out_unlock_inode:
740 ocfs2_inode_unlock(inode, 1);
741
742 out:
743 ocfs2_inode_unlock(dir, 1);
744
745 brelse(fe_bh);
746 brelse(parent_fe_bh);
747
748 ocfs2_free_dir_lookup_result(&lookup);
749
750 mlog_exit(err);
751
752 return err;
753 }
754
755 /*
756 * Takes and drops an exclusive lock on the given dentry. This will
757 * force other nodes to drop it.
758 */
759 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
760 {
761 int ret;
762
763 ret = ocfs2_dentry_lock(dentry, 1);
764 if (ret)
765 mlog_errno(ret);
766 else
767 ocfs2_dentry_unlock(dentry, 1);
768
769 return ret;
770 }
771
772 static inline int inode_is_unlinkable(struct inode *inode)
773 {
774 if (S_ISDIR(inode->i_mode)) {
775 if (inode->i_nlink == 2)
776 return 1;
777 return 0;
778 }
779
780 if (inode->i_nlink == 1)
781 return 1;
782 return 0;
783 }
784
785 static int ocfs2_unlink(struct inode *dir,
786 struct dentry *dentry)
787 {
788 int status;
789 int child_locked = 0;
790 struct inode *inode = dentry->d_inode;
791 struct inode *orphan_dir = NULL;
792 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
793 u64 blkno;
794 struct ocfs2_dinode *fe = NULL;
795 struct buffer_head *fe_bh = NULL;
796 struct buffer_head *parent_node_bh = NULL;
797 handle_t *handle = NULL;
798 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
799 struct ocfs2_dir_lookup_result lookup = { NULL, };
800 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
801
802 mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
803 dentry->d_name.len, dentry->d_name.name);
804
805 dquot_initialize(dir);
806
807 BUG_ON(dentry->d_parent->d_inode != dir);
808
809 mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno);
810
811 if (inode == osb->root_inode) {
812 mlog(0, "Cannot delete the root directory\n");
813 return -EPERM;
814 }
815
816 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
817 OI_LS_PARENT);
818 if (status < 0) {
819 if (status != -ENOENT)
820 mlog_errno(status);
821 return status;
822 }
823
824 status = ocfs2_find_files_on_disk(dentry->d_name.name,
825 dentry->d_name.len, &blkno, dir,
826 &lookup);
827 if (status < 0) {
828 if (status != -ENOENT)
829 mlog_errno(status);
830 goto leave;
831 }
832
833 if (OCFS2_I(inode)->ip_blkno != blkno) {
834 status = -ENOENT;
835
836 mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n",
837 (unsigned long long)OCFS2_I(inode)->ip_blkno,
838 (unsigned long long)blkno, OCFS2_I(inode)->ip_flags);
839 goto leave;
840 }
841
842 status = ocfs2_inode_lock(inode, &fe_bh, 1);
843 if (status < 0) {
844 if (status != -ENOENT)
845 mlog_errno(status);
846 goto leave;
847 }
848 child_locked = 1;
849
850 if (S_ISDIR(inode->i_mode)) {
851 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
852 status = -ENOTEMPTY;
853 goto leave;
854 }
855 }
856
857 status = ocfs2_remote_dentry_delete(dentry);
858 if (status < 0) {
859 /* This remote delete should succeed under all normal
860 * circumstances. */
861 mlog_errno(status);
862 goto leave;
863 }
864
865 if (inode_is_unlinkable(inode)) {
866 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
867 OCFS2_I(inode)->ip_blkno,
868 orphan_name, &orphan_insert);
869 if (status < 0) {
870 mlog_errno(status);
871 goto leave;
872 }
873 }
874
875 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
876 if (IS_ERR(handle)) {
877 status = PTR_ERR(handle);
878 handle = NULL;
879 mlog_errno(status);
880 goto leave;
881 }
882
883 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
884 OCFS2_JOURNAL_ACCESS_WRITE);
885 if (status < 0) {
886 mlog_errno(status);
887 goto leave;
888 }
889
890 fe = (struct ocfs2_dinode *) fe_bh->b_data;
891
892 if (inode_is_unlinkable(inode)) {
893 status = ocfs2_orphan_add(osb, handle, inode, fe_bh, orphan_name,
894 &orphan_insert, orphan_dir);
895 if (status < 0) {
896 mlog_errno(status);
897 goto leave;
898 }
899 }
900
901 /* delete the name from the parent dir */
902 status = ocfs2_delete_entry(handle, dir, &lookup);
903 if (status < 0) {
904 mlog_errno(status);
905 goto leave;
906 }
907
908 if (S_ISDIR(inode->i_mode))
909 drop_nlink(inode);
910 drop_nlink(inode);
911 ocfs2_set_links_count(fe, inode->i_nlink);
912
913 status = ocfs2_journal_dirty(handle, fe_bh);
914 if (status < 0) {
915 mlog_errno(status);
916 goto leave;
917 }
918
919 dir->i_ctime = dir->i_mtime = CURRENT_TIME;
920 if (S_ISDIR(inode->i_mode))
921 drop_nlink(dir);
922
923 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
924 if (status < 0) {
925 mlog_errno(status);
926 if (S_ISDIR(inode->i_mode))
927 inc_nlink(dir);
928 }
929
930 leave:
931 if (handle)
932 ocfs2_commit_trans(osb, handle);
933
934 if (child_locked)
935 ocfs2_inode_unlock(inode, 1);
936
937 ocfs2_inode_unlock(dir, 1);
938
939 if (orphan_dir) {
940 /* This was locked for us in ocfs2_prepare_orphan_dir() */
941 ocfs2_inode_unlock(orphan_dir, 1);
942 mutex_unlock(&orphan_dir->i_mutex);
943 iput(orphan_dir);
944 }
945
946 brelse(fe_bh);
947 brelse(parent_node_bh);
948
949 ocfs2_free_dir_lookup_result(&orphan_insert);
950 ocfs2_free_dir_lookup_result(&lookup);
951
952 mlog_exit(status);
953
954 return status;
955 }
956
957 /*
958 * The only place this should be used is rename!
959 * if they have the same id, then the 1st one is the only one locked.
960 */
961 static int ocfs2_double_lock(struct ocfs2_super *osb,
962 struct buffer_head **bh1,
963 struct inode *inode1,
964 struct buffer_head **bh2,
965 struct inode *inode2)
966 {
967 int status;
968 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
969 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
970 struct buffer_head **tmpbh;
971 struct inode *tmpinode;
972
973 mlog_entry("(inode1 = %llu, inode2 = %llu)\n",
974 (unsigned long long)oi1->ip_blkno,
975 (unsigned long long)oi2->ip_blkno);
976
977 if (*bh1)
978 *bh1 = NULL;
979 if (*bh2)
980 *bh2 = NULL;
981
982 /* we always want to lock the one with the lower lockid first. */
983 if (oi1->ip_blkno != oi2->ip_blkno) {
984 if (oi1->ip_blkno < oi2->ip_blkno) {
985 /* switch id1 and id2 around */
986 mlog(0, "switching them around...\n");
987 tmpbh = bh2;
988 bh2 = bh1;
989 bh1 = tmpbh;
990
991 tmpinode = inode2;
992 inode2 = inode1;
993 inode1 = tmpinode;
994 }
995 /* lock id2 */
996 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
997 OI_LS_RENAME1);
998 if (status < 0) {
999 if (status != -ENOENT)
1000 mlog_errno(status);
1001 goto bail;
1002 }
1003 }
1004
1005 /* lock id1 */
1006 status = ocfs2_inode_lock_nested(inode1, bh1, 1, OI_LS_RENAME2);
1007 if (status < 0) {
1008 /*
1009 * An error return must mean that no cluster locks
1010 * were held on function exit.
1011 */
1012 if (oi1->ip_blkno != oi2->ip_blkno)
1013 ocfs2_inode_unlock(inode2, 1);
1014
1015 if (status != -ENOENT)
1016 mlog_errno(status);
1017 }
1018
1019 bail:
1020 mlog_exit(status);
1021 return status;
1022 }
1023
1024 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1025 {
1026 ocfs2_inode_unlock(inode1, 1);
1027
1028 if (inode1 != inode2)
1029 ocfs2_inode_unlock(inode2, 1);
1030 }
1031
1032 static int ocfs2_rename(struct inode *old_dir,
1033 struct dentry *old_dentry,
1034 struct inode *new_dir,
1035 struct dentry *new_dentry)
1036 {
1037 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1038 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1039 struct inode *old_inode = old_dentry->d_inode;
1040 struct inode *new_inode = new_dentry->d_inode;
1041 struct inode *orphan_dir = NULL;
1042 struct ocfs2_dinode *newfe = NULL;
1043 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1044 struct buffer_head *newfe_bh = NULL;
1045 struct buffer_head *old_inode_bh = NULL;
1046 struct ocfs2_super *osb = NULL;
1047 u64 newfe_blkno, old_de_ino;
1048 handle_t *handle = NULL;
1049 struct buffer_head *old_dir_bh = NULL;
1050 struct buffer_head *new_dir_bh = NULL;
1051 nlink_t old_dir_nlink = old_dir->i_nlink;
1052 struct ocfs2_dinode *old_di;
1053 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1054 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1055 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1056 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1057 struct ocfs2_dir_lookup_result target_insert = { NULL, };
1058
1059 /* At some point it might be nice to break this function up a
1060 * bit. */
1061
1062 mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n",
1063 old_dir, old_dentry, new_dir, new_dentry,
1064 old_dentry->d_name.len, old_dentry->d_name.name,
1065 new_dentry->d_name.len, new_dentry->d_name.name);
1066
1067 dquot_initialize(old_dir);
1068 dquot_initialize(new_dir);
1069
1070 osb = OCFS2_SB(old_dir->i_sb);
1071
1072 if (new_inode) {
1073 if (!igrab(new_inode))
1074 BUG();
1075 }
1076
1077 /* Assume a directory hierarchy thusly:
1078 * a/b/c
1079 * a/d
1080 * a,b,c, and d are all directories.
1081 *
1082 * from cwd of 'a' on both nodes:
1083 * node1: mv b/c d
1084 * node2: mv d b/c
1085 *
1086 * And that's why, just like the VFS, we need a file system
1087 * rename lock. */
1088 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1089 status = ocfs2_rename_lock(osb);
1090 if (status < 0) {
1091 mlog_errno(status);
1092 goto bail;
1093 }
1094 rename_lock = 1;
1095 }
1096
1097 /* if old and new are the same, this'll just do one lock. */
1098 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1099 &new_dir_bh, new_dir);
1100 if (status < 0) {
1101 mlog_errno(status);
1102 goto bail;
1103 }
1104 parents_locked = 1;
1105
1106 /* make sure both dirs have bhs
1107 * get an extra ref on old_dir_bh if old==new */
1108 if (!new_dir_bh) {
1109 if (old_dir_bh) {
1110 new_dir_bh = old_dir_bh;
1111 get_bh(new_dir_bh);
1112 } else {
1113 mlog(ML_ERROR, "no old_dir_bh!\n");
1114 status = -EIO;
1115 goto bail;
1116 }
1117 }
1118
1119 /*
1120 * Aside from allowing a meta data update, the locking here
1121 * also ensures that the downconvert thread on other nodes
1122 * won't have to concurrently downconvert the inode and the
1123 * dentry locks.
1124 */
1125 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1126 OI_LS_PARENT);
1127 if (status < 0) {
1128 if (status != -ENOENT)
1129 mlog_errno(status);
1130 goto bail;
1131 }
1132 old_child_locked = 1;
1133
1134 status = ocfs2_remote_dentry_delete(old_dentry);
1135 if (status < 0) {
1136 mlog_errno(status);
1137 goto bail;
1138 }
1139
1140 if (S_ISDIR(old_inode->i_mode)) {
1141 u64 old_inode_parent;
1142
1143 update_dot_dot = 1;
1144 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1145 old_inode,
1146 &old_inode_dot_dot_res);
1147 if (status) {
1148 status = -EIO;
1149 goto bail;
1150 }
1151
1152 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1153 status = -EIO;
1154 goto bail;
1155 }
1156
1157 if (!new_inode && new_dir != old_dir &&
1158 new_dir->i_nlink >= ocfs2_link_max(osb)) {
1159 status = -EMLINK;
1160 goto bail;
1161 }
1162 }
1163
1164 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1165 old_dentry->d_name.len,
1166 &old_de_ino);
1167 if (status) {
1168 status = -ENOENT;
1169 goto bail;
1170 }
1171
1172 /*
1173 * Check for inode number is _not_ due to possible IO errors.
1174 * We might rmdir the source, keep it as pwd of some process
1175 * and merrily kill the link to whatever was created under the
1176 * same name. Goodbye sticky bit ;-<
1177 */
1178 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1179 status = -ENOENT;
1180 goto bail;
1181 }
1182
1183 /* check if the target already exists (in which case we need
1184 * to delete it */
1185 status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1186 new_dentry->d_name.len,
1187 &newfe_blkno, new_dir,
1188 &target_lookup_res);
1189 /* The only error we allow here is -ENOENT because the new
1190 * file not existing is perfectly valid. */
1191 if ((status < 0) && (status != -ENOENT)) {
1192 /* If we cannot find the file specified we should just */
1193 /* return the error... */
1194 mlog_errno(status);
1195 goto bail;
1196 }
1197 if (status == 0)
1198 target_exists = 1;
1199
1200 if (!target_exists && new_inode) {
1201 /*
1202 * Target was unlinked by another node while we were
1203 * waiting to get to ocfs2_rename(). There isn't
1204 * anything we can do here to help the situation, so
1205 * bubble up the appropriate error.
1206 */
1207 status = -ENOENT;
1208 goto bail;
1209 }
1210
1211 /* In case we need to overwrite an existing file, we blow it
1212 * away first */
1213 if (target_exists) {
1214 /* VFS didn't think there existed an inode here, but
1215 * someone else in the cluster must have raced our
1216 * rename to create one. Today we error cleanly, in
1217 * the future we should consider calling iget to build
1218 * a new struct inode for this entry. */
1219 if (!new_inode) {
1220 status = -EACCES;
1221
1222 mlog(0, "We found an inode for name %.*s but VFS "
1223 "didn't give us one.\n", new_dentry->d_name.len,
1224 new_dentry->d_name.name);
1225 goto bail;
1226 }
1227
1228 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1229 status = -EACCES;
1230
1231 mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n",
1232 (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1233 (unsigned long long)newfe_blkno,
1234 OCFS2_I(new_inode)->ip_flags);
1235 goto bail;
1236 }
1237
1238 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1239 if (status < 0) {
1240 if (status != -ENOENT)
1241 mlog_errno(status);
1242 goto bail;
1243 }
1244 new_child_locked = 1;
1245
1246 status = ocfs2_remote_dentry_delete(new_dentry);
1247 if (status < 0) {
1248 mlog_errno(status);
1249 goto bail;
1250 }
1251
1252 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1253
1254 mlog(0, "aha rename over existing... new_blkno=%llu "
1255 "newfebh=%p bhblocknr=%llu\n",
1256 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1257 (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1258
1259 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1260 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1261 OCFS2_I(new_inode)->ip_blkno,
1262 orphan_name, &orphan_insert);
1263 if (status < 0) {
1264 mlog_errno(status);
1265 goto bail;
1266 }
1267 }
1268 } else {
1269 BUG_ON(new_dentry->d_parent->d_inode != new_dir);
1270
1271 status = ocfs2_check_dir_for_entry(new_dir,
1272 new_dentry->d_name.name,
1273 new_dentry->d_name.len);
1274 if (status)
1275 goto bail;
1276
1277 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1278 new_dentry->d_name.name,
1279 new_dentry->d_name.len,
1280 &target_insert);
1281 if (status < 0) {
1282 mlog_errno(status);
1283 goto bail;
1284 }
1285 }
1286
1287 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1288 if (IS_ERR(handle)) {
1289 status = PTR_ERR(handle);
1290 handle = NULL;
1291 mlog_errno(status);
1292 goto bail;
1293 }
1294
1295 if (target_exists) {
1296 if (S_ISDIR(new_inode->i_mode)) {
1297 if (new_inode->i_nlink != 2 ||
1298 !ocfs2_empty_dir(new_inode)) {
1299 status = -ENOTEMPTY;
1300 goto bail;
1301 }
1302 }
1303 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1304 newfe_bh,
1305 OCFS2_JOURNAL_ACCESS_WRITE);
1306 if (status < 0) {
1307 mlog_errno(status);
1308 goto bail;
1309 }
1310
1311 if (S_ISDIR(new_inode->i_mode) ||
1312 (ocfs2_read_links_count(newfe) == 1)) {
1313 status = ocfs2_orphan_add(osb, handle, new_inode,
1314 newfe_bh, orphan_name,
1315 &orphan_insert, orphan_dir);
1316 if (status < 0) {
1317 mlog_errno(status);
1318 goto bail;
1319 }
1320 }
1321
1322 /* change the dirent to point to the correct inode */
1323 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1324 old_inode);
1325 if (status < 0) {
1326 mlog_errno(status);
1327 goto bail;
1328 }
1329 new_dir->i_version++;
1330
1331 if (S_ISDIR(new_inode->i_mode))
1332 ocfs2_set_links_count(newfe, 0);
1333 else
1334 ocfs2_add_links_count(newfe, -1);
1335
1336 status = ocfs2_journal_dirty(handle, newfe_bh);
1337 if (status < 0) {
1338 mlog_errno(status);
1339 goto bail;
1340 }
1341 } else {
1342 /* if the name was not found in new_dir, add it now */
1343 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1344 OCFS2_I(old_inode)->ip_blkno,
1345 new_dir_bh, &target_insert);
1346 }
1347
1348 old_inode->i_ctime = CURRENT_TIME;
1349 mark_inode_dirty(old_inode);
1350
1351 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1352 old_inode_bh,
1353 OCFS2_JOURNAL_ACCESS_WRITE);
1354 if (status >= 0) {
1355 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1356
1357 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1358 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1359
1360 status = ocfs2_journal_dirty(handle, old_inode_bh);
1361 if (status < 0)
1362 mlog_errno(status);
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 status = 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 status = ocfs2_journal_dirty(handle, bhs[virtual]);
1567 if (status < 0) {
1568 mlog_errno(status);
1569 goto bail;
1570 }
1571
1572 virtual++;
1573 p_blkno++;
1574 bytes_left -= sb->s_blocksize;
1575 }
1576
1577 status = 0;
1578 bail:
1579
1580 if (bhs) {
1581 for(i = 0; i < blocks; i++)
1582 brelse(bhs[i]);
1583 kfree(bhs);
1584 }
1585
1586 mlog_exit(status);
1587 return status;
1588 }
1589
1590 static int ocfs2_symlink(struct inode *dir,
1591 struct dentry *dentry,
1592 const char *symname)
1593 {
1594 int status, l, credits;
1595 u64 newsize;
1596 struct ocfs2_super *osb = NULL;
1597 struct inode *inode = NULL;
1598 struct super_block *sb;
1599 struct buffer_head *new_fe_bh = NULL;
1600 struct buffer_head *parent_fe_bh = NULL;
1601 struct ocfs2_dinode *fe = NULL;
1602 struct ocfs2_dinode *dirfe;
1603 handle_t *handle = NULL;
1604 struct ocfs2_alloc_context *inode_ac = NULL;
1605 struct ocfs2_alloc_context *data_ac = NULL;
1606 struct ocfs2_alloc_context *xattr_ac = NULL;
1607 int want_clusters = 0;
1608 int xattr_credits = 0;
1609 struct ocfs2_security_xattr_info si = {
1610 .enable = 1,
1611 };
1612 int did_quota = 0, did_quota_inode = 0;
1613 struct ocfs2_dir_lookup_result lookup = { NULL, };
1614
1615 mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir,
1616 dentry, symname, dentry->d_name.len, dentry->d_name.name);
1617
1618 dquot_initialize(dir);
1619
1620 sb = dir->i_sb;
1621 osb = OCFS2_SB(sb);
1622
1623 l = strlen(symname) + 1;
1624
1625 credits = ocfs2_calc_symlink_credits(sb);
1626
1627 /* lock the parent directory */
1628 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1629 if (status < 0) {
1630 if (status != -ENOENT)
1631 mlog_errno(status);
1632 return status;
1633 }
1634
1635 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1636 if (!ocfs2_read_links_count(dirfe)) {
1637 /* can't make a file in a deleted directory. */
1638 status = -ENOENT;
1639 goto bail;
1640 }
1641
1642 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1643 dentry->d_name.len);
1644 if (status)
1645 goto bail;
1646
1647 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1648 dentry->d_name.name,
1649 dentry->d_name.len, &lookup);
1650 if (status < 0) {
1651 mlog_errno(status);
1652 goto bail;
1653 }
1654
1655 status = ocfs2_reserve_new_inode(osb, &inode_ac);
1656 if (status < 0) {
1657 if (status != -ENOSPC)
1658 mlog_errno(status);
1659 goto bail;
1660 }
1661
1662 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1663 if (!inode) {
1664 status = -ENOMEM;
1665 mlog_errno(status);
1666 goto bail;
1667 }
1668
1669 /* get security xattr */
1670 status = ocfs2_init_security_get(inode, dir, &si);
1671 if (status) {
1672 if (status == -EOPNOTSUPP)
1673 si.enable = 0;
1674 else {
1675 mlog_errno(status);
1676 goto bail;
1677 }
1678 }
1679
1680 /* calculate meta data/clusters for setting security xattr */
1681 if (si.enable) {
1682 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1683 &xattr_credits, &xattr_ac);
1684 if (status < 0) {
1685 mlog_errno(status);
1686 goto bail;
1687 }
1688 }
1689
1690 /* don't reserve bitmap space for fast symlinks. */
1691 if (l > ocfs2_fast_symlink_chars(sb))
1692 want_clusters += 1;
1693
1694 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1695 if (status < 0) {
1696 if (status != -ENOSPC)
1697 mlog_errno(status);
1698 goto bail;
1699 }
1700
1701 handle = ocfs2_start_trans(osb, credits + xattr_credits);
1702 if (IS_ERR(handle)) {
1703 status = PTR_ERR(handle);
1704 handle = NULL;
1705 mlog_errno(status);
1706 goto bail;
1707 }
1708
1709 status = dquot_alloc_inode(inode);
1710 if (status)
1711 goto bail;
1712 did_quota_inode = 1;
1713
1714 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry,
1715 inode->i_mode, dentry->d_name.len,
1716 dentry->d_name.name);
1717
1718 status = ocfs2_mknod_locked(osb, dir, inode,
1719 0, &new_fe_bh, parent_fe_bh, handle,
1720 inode_ac);
1721 if (status < 0) {
1722 mlog_errno(status);
1723 goto bail;
1724 }
1725
1726 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1727 inode->i_rdev = 0;
1728 newsize = l - 1;
1729 if (l > ocfs2_fast_symlink_chars(sb)) {
1730 u32 offset = 0;
1731
1732 inode->i_op = &ocfs2_symlink_inode_operations;
1733 status = dquot_alloc_space_nodirty(inode,
1734 ocfs2_clusters_to_bytes(osb->sb, 1));
1735 if (status)
1736 goto bail;
1737 did_quota = 1;
1738 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1739 new_fe_bh,
1740 handle, data_ac, NULL,
1741 NULL);
1742 if (status < 0) {
1743 if (status != -ENOSPC && status != -EINTR) {
1744 mlog(ML_ERROR,
1745 "Failed to extend file to %llu\n",
1746 (unsigned long long)newsize);
1747 mlog_errno(status);
1748 status = -ENOSPC;
1749 }
1750 goto bail;
1751 }
1752 i_size_write(inode, newsize);
1753 inode->i_blocks = ocfs2_inode_sector_count(inode);
1754 } else {
1755 inode->i_op = &ocfs2_fast_symlink_inode_operations;
1756 memcpy((char *) fe->id2.i_symlink, symname, l);
1757 i_size_write(inode, newsize);
1758 inode->i_blocks = 0;
1759 }
1760
1761 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1762 if (status < 0) {
1763 mlog_errno(status);
1764 goto bail;
1765 }
1766
1767 if (!ocfs2_inode_is_fast_symlink(inode)) {
1768 status = ocfs2_create_symlink_data(osb, handle, inode,
1769 symname);
1770 if (status < 0) {
1771 mlog_errno(status);
1772 goto bail;
1773 }
1774 }
1775
1776 if (si.enable) {
1777 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1778 xattr_ac, data_ac);
1779 if (status < 0) {
1780 mlog_errno(status);
1781 goto bail;
1782 }
1783 }
1784
1785 /*
1786 * Do this before adding the entry to the directory. We add
1787 * also set d_op after success so that ->d_iput() will cleanup
1788 * the dentry lock even if ocfs2_add_entry() fails below.
1789 */
1790 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1791 if (status) {
1792 mlog_errno(status);
1793 goto bail;
1794 }
1795 dentry->d_op = &ocfs2_dentry_ops;
1796
1797 status = ocfs2_add_entry(handle, dentry, inode,
1798 le64_to_cpu(fe->i_blkno), parent_fe_bh,
1799 &lookup);
1800 if (status < 0) {
1801 mlog_errno(status);
1802 goto bail;
1803 }
1804
1805 insert_inode_hash(inode);
1806 d_instantiate(dentry, inode);
1807 bail:
1808 if (status < 0 && did_quota)
1809 dquot_free_space_nodirty(inode,
1810 ocfs2_clusters_to_bytes(osb->sb, 1));
1811 if (status < 0 && did_quota_inode)
1812 dquot_free_inode(inode);
1813 if (handle)
1814 ocfs2_commit_trans(osb, handle);
1815
1816 ocfs2_inode_unlock(dir, 1);
1817
1818 brelse(new_fe_bh);
1819 brelse(parent_fe_bh);
1820 kfree(si.name);
1821 kfree(si.value);
1822 ocfs2_free_dir_lookup_result(&lookup);
1823 if (inode_ac)
1824 ocfs2_free_alloc_context(inode_ac);
1825 if (data_ac)
1826 ocfs2_free_alloc_context(data_ac);
1827 if (xattr_ac)
1828 ocfs2_free_alloc_context(xattr_ac);
1829 if ((status < 0) && inode) {
1830 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
1831 clear_nlink(inode);
1832 iput(inode);
1833 }
1834
1835 mlog_exit(status);
1836
1837 return status;
1838 }
1839
1840 static int ocfs2_blkno_stringify(u64 blkno, char *name)
1841 {
1842 int status, namelen;
1843
1844 mlog_entry_void();
1845
1846 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
1847 (long long)blkno);
1848 if (namelen <= 0) {
1849 if (namelen)
1850 status = namelen;
1851 else
1852 status = -EINVAL;
1853 mlog_errno(status);
1854 goto bail;
1855 }
1856 if (namelen != OCFS2_ORPHAN_NAMELEN) {
1857 status = -EINVAL;
1858 mlog_errno(status);
1859 goto bail;
1860 }
1861
1862 mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name,
1863 namelen);
1864
1865 status = 0;
1866 bail:
1867 mlog_exit(status);
1868 return status;
1869 }
1870
1871 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
1872 struct inode **ret_orphan_dir,
1873 u64 blkno,
1874 char *name,
1875 struct ocfs2_dir_lookup_result *lookup)
1876 {
1877 struct inode *orphan_dir_inode;
1878 struct buffer_head *orphan_dir_bh = NULL;
1879 int status = 0;
1880
1881 status = ocfs2_blkno_stringify(blkno, name);
1882 if (status < 0) {
1883 mlog_errno(status);
1884 return status;
1885 }
1886
1887 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
1888 ORPHAN_DIR_SYSTEM_INODE,
1889 osb->slot_num);
1890 if (!orphan_dir_inode) {
1891 status = -ENOENT;
1892 mlog_errno(status);
1893 return status;
1894 }
1895
1896 mutex_lock(&orphan_dir_inode->i_mutex);
1897
1898 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
1899 if (status < 0) {
1900 mlog_errno(status);
1901 goto leave;
1902 }
1903
1904 status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
1905 orphan_dir_bh, name,
1906 OCFS2_ORPHAN_NAMELEN, lookup);
1907 if (status < 0) {
1908 ocfs2_inode_unlock(orphan_dir_inode, 1);
1909
1910 mlog_errno(status);
1911 goto leave;
1912 }
1913
1914 *ret_orphan_dir = orphan_dir_inode;
1915
1916 leave:
1917 if (status) {
1918 mutex_unlock(&orphan_dir_inode->i_mutex);
1919 iput(orphan_dir_inode);
1920 }
1921
1922 brelse(orphan_dir_bh);
1923
1924 mlog_exit(status);
1925 return status;
1926 }
1927
1928 static int ocfs2_orphan_add(struct ocfs2_super *osb,
1929 handle_t *handle,
1930 struct inode *inode,
1931 struct buffer_head *fe_bh,
1932 char *name,
1933 struct ocfs2_dir_lookup_result *lookup,
1934 struct inode *orphan_dir_inode)
1935 {
1936 struct buffer_head *orphan_dir_bh = NULL;
1937 int status = 0;
1938 struct ocfs2_dinode *orphan_fe;
1939 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
1940
1941 mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);
1942
1943 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
1944 if (status < 0) {
1945 mlog_errno(status);
1946 goto leave;
1947 }
1948
1949 status = ocfs2_journal_access_di(handle,
1950 INODE_CACHE(orphan_dir_inode),
1951 orphan_dir_bh,
1952 OCFS2_JOURNAL_ACCESS_WRITE);
1953 if (status < 0) {
1954 mlog_errno(status);
1955 goto leave;
1956 }
1957
1958 /* we're a cluster, and nlink can change on disk from
1959 * underneath us... */
1960 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
1961 if (S_ISDIR(inode->i_mode))
1962 ocfs2_add_links_count(orphan_fe, 1);
1963 orphan_dir_inode->i_nlink = ocfs2_read_links_count(orphan_fe);
1964
1965 status = ocfs2_journal_dirty(handle, orphan_dir_bh);
1966 if (status < 0) {
1967 mlog_errno(status);
1968 goto leave;
1969 }
1970
1971 status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
1972 OCFS2_ORPHAN_NAMELEN, inode,
1973 OCFS2_I(inode)->ip_blkno,
1974 orphan_dir_bh, lookup);
1975 if (status < 0) {
1976 mlog_errno(status);
1977 goto leave;
1978 }
1979
1980 /*
1981 * We're going to journal the change of i_flags and i_orphaned_slot.
1982 * It's safe anyway, though some callers may duplicate the journaling.
1983 * Journaling within the func just make the logic look more
1984 * straightforward.
1985 */
1986 status = ocfs2_journal_access_di(handle,
1987 INODE_CACHE(inode),
1988 fe_bh,
1989 OCFS2_JOURNAL_ACCESS_WRITE);
1990 if (status < 0) {
1991 mlog_errno(status);
1992 goto leave;
1993 }
1994
1995 le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL);
1996 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
1997
1998 /* Record which orphan dir our inode now resides
1999 * in. delete_inode will use this to determine which orphan
2000 * dir to lock. */
2001 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2002
2003 ocfs2_journal_dirty(handle, fe_bh);
2004
2005 mlog(0, "Inode %llu orphaned in slot %d\n",
2006 (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num);
2007
2008 leave:
2009 brelse(orphan_dir_bh);
2010
2011 mlog_exit(status);
2012 return status;
2013 }
2014
2015 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2016 int ocfs2_orphan_del(struct ocfs2_super *osb,
2017 handle_t *handle,
2018 struct inode *orphan_dir_inode,
2019 struct inode *inode,
2020 struct buffer_head *orphan_dir_bh)
2021 {
2022 char name[OCFS2_ORPHAN_NAMELEN + 1];
2023 struct ocfs2_dinode *orphan_fe;
2024 int status = 0;
2025 struct ocfs2_dir_lookup_result lookup = { NULL, };
2026
2027 mlog_entry_void();
2028
2029 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2030 if (status < 0) {
2031 mlog_errno(status);
2032 goto leave;
2033 }
2034
2035 mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n",
2036 name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2037 OCFS2_ORPHAN_NAMELEN);
2038
2039 /* find it's spot in the orphan directory */
2040 status = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, orphan_dir_inode,
2041 &lookup);
2042 if (status) {
2043 mlog_errno(status);
2044 goto leave;
2045 }
2046
2047 /* remove it from the orphan directory */
2048 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2049 if (status < 0) {
2050 mlog_errno(status);
2051 goto leave;
2052 }
2053
2054 status = ocfs2_journal_access_di(handle,
2055 INODE_CACHE(orphan_dir_inode),
2056 orphan_dir_bh,
2057 OCFS2_JOURNAL_ACCESS_WRITE);
2058 if (status < 0) {
2059 mlog_errno(status);
2060 goto leave;
2061 }
2062
2063 /* do the i_nlink dance! :) */
2064 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2065 if (S_ISDIR(inode->i_mode))
2066 ocfs2_add_links_count(orphan_fe, -1);
2067 orphan_dir_inode->i_nlink = ocfs2_read_links_count(orphan_fe);
2068
2069 status = ocfs2_journal_dirty(handle, orphan_dir_bh);
2070 if (status < 0) {
2071 mlog_errno(status);
2072 goto leave;
2073 }
2074
2075 leave:
2076 ocfs2_free_dir_lookup_result(&lookup);
2077
2078 mlog_exit(status);
2079 return status;
2080 }
2081
2082 int ocfs2_create_inode_in_orphan(struct inode *dir,
2083 int mode,
2084 struct inode **new_inode)
2085 {
2086 int status, did_quota_inode = 0;
2087 struct inode *inode = NULL;
2088 struct inode *orphan_dir = NULL;
2089 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2090 struct ocfs2_dinode *di = NULL;
2091 handle_t *handle = NULL;
2092 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2093 struct buffer_head *parent_di_bh = NULL;
2094 struct buffer_head *new_di_bh = NULL;
2095 struct ocfs2_alloc_context *inode_ac = NULL;
2096 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2097
2098 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2099 if (status < 0) {
2100 if (status != -ENOENT)
2101 mlog_errno(status);
2102 return status;
2103 }
2104
2105 /*
2106 * We give the orphan dir the root blkno to fake an orphan name,
2107 * and allocate enough space for our insertion.
2108 */
2109 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
2110 osb->root_blkno,
2111 orphan_name, &orphan_insert);
2112 if (status < 0) {
2113 mlog_errno(status);
2114 goto leave;
2115 }
2116
2117 /* reserve an inode spot */
2118 status = ocfs2_reserve_new_inode(osb, &inode_ac);
2119 if (status < 0) {
2120 if (status != -ENOSPC)
2121 mlog_errno(status);
2122 goto leave;
2123 }
2124
2125 inode = ocfs2_get_init_inode(dir, mode);
2126 if (!inode) {
2127 status = -ENOMEM;
2128 mlog_errno(status);
2129 goto leave;
2130 }
2131
2132 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2133 if (IS_ERR(handle)) {
2134 status = PTR_ERR(handle);
2135 handle = NULL;
2136 mlog_errno(status);
2137 goto leave;
2138 }
2139
2140 status = dquot_alloc_inode(inode);
2141 if (status)
2142 goto leave;
2143 did_quota_inode = 1;
2144
2145 inode->i_nlink = 0;
2146 /* do the real work now. */
2147 status = ocfs2_mknod_locked(osb, dir, inode,
2148 0, &new_di_bh, parent_di_bh, handle,
2149 inode_ac);
2150 if (status < 0) {
2151 mlog_errno(status);
2152 goto leave;
2153 }
2154
2155 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, orphan_name);
2156 if (status < 0) {
2157 mlog_errno(status);
2158 goto leave;
2159 }
2160
2161 di = (struct ocfs2_dinode *)new_di_bh->b_data;
2162 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2163 &orphan_insert, orphan_dir);
2164 if (status < 0) {
2165 mlog_errno(status);
2166 goto leave;
2167 }
2168
2169 /* get open lock so that only nodes can't remove it from orphan dir. */
2170 status = ocfs2_open_lock(inode);
2171 if (status < 0)
2172 mlog_errno(status);
2173
2174 insert_inode_hash(inode);
2175 leave:
2176 if (status < 0 && did_quota_inode)
2177 dquot_free_inode(inode);
2178 if (handle)
2179 ocfs2_commit_trans(osb, handle);
2180
2181 if (orphan_dir) {
2182 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2183 ocfs2_inode_unlock(orphan_dir, 1);
2184 mutex_unlock(&orphan_dir->i_mutex);
2185 iput(orphan_dir);
2186 }
2187
2188 if (status == -ENOSPC)
2189 mlog(0, "Disk is full\n");
2190
2191 if ((status < 0) && inode) {
2192 clear_nlink(inode);
2193 iput(inode);
2194 }
2195
2196 if (inode_ac)
2197 ocfs2_free_alloc_context(inode_ac);
2198
2199 brelse(new_di_bh);
2200
2201 if (!status)
2202 *new_inode = inode;
2203
2204 ocfs2_free_dir_lookup_result(&orphan_insert);
2205
2206 ocfs2_inode_unlock(dir, 1);
2207 brelse(parent_di_bh);
2208 return status;
2209 }
2210
2211 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2212 struct inode *inode,
2213 struct dentry *dentry)
2214 {
2215 int status = 0;
2216 struct buffer_head *parent_di_bh = NULL;
2217 handle_t *handle = NULL;
2218 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2219 struct ocfs2_dinode *dir_di, *di;
2220 struct inode *orphan_dir_inode = NULL;
2221 struct buffer_head *orphan_dir_bh = NULL;
2222 struct buffer_head *di_bh = NULL;
2223 struct ocfs2_dir_lookup_result lookup = { NULL, };
2224
2225 mlog_entry("(0x%p, 0x%p, %.*s')\n", dir, dentry,
2226 dentry->d_name.len, dentry->d_name.name);
2227
2228 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2229 if (status < 0) {
2230 if (status != -ENOENT)
2231 mlog_errno(status);
2232 return status;
2233 }
2234
2235 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2236 if (!dir_di->i_links_count) {
2237 /* can't make a file in a deleted directory. */
2238 status = -ENOENT;
2239 goto leave;
2240 }
2241
2242 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2243 dentry->d_name.len);
2244 if (status)
2245 goto leave;
2246
2247 /* get a spot inside the dir. */
2248 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2249 dentry->d_name.name,
2250 dentry->d_name.len, &lookup);
2251 if (status < 0) {
2252 mlog_errno(status);
2253 goto leave;
2254 }
2255
2256 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2257 ORPHAN_DIR_SYSTEM_INODE,
2258 osb->slot_num);
2259 if (!orphan_dir_inode) {
2260 status = -EEXIST;
2261 mlog_errno(status);
2262 goto leave;
2263 }
2264
2265 mutex_lock(&orphan_dir_inode->i_mutex);
2266
2267 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2268 if (status < 0) {
2269 mlog_errno(status);
2270 mutex_unlock(&orphan_dir_inode->i_mutex);
2271 iput(orphan_dir_inode);
2272 goto leave;
2273 }
2274
2275 status = ocfs2_read_inode_block(inode, &di_bh);
2276 if (status < 0) {
2277 mlog_errno(status);
2278 goto orphan_unlock;
2279 }
2280
2281 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2282 if (IS_ERR(handle)) {
2283 status = PTR_ERR(handle);
2284 handle = NULL;
2285 mlog_errno(status);
2286 goto orphan_unlock;
2287 }
2288
2289 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2290 di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2291 if (status < 0) {
2292 mlog_errno(status);
2293 goto out_commit;
2294 }
2295
2296 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2297 orphan_dir_bh);
2298 if (status < 0) {
2299 mlog_errno(status);
2300 goto out_commit;
2301 }
2302
2303 di = (struct ocfs2_dinode *)di_bh->b_data;
2304 le32_add_cpu(&di->i_flags, -OCFS2_ORPHANED_FL);
2305 di->i_orphaned_slot = 0;
2306 inode->i_nlink = 1;
2307 ocfs2_set_links_count(di, inode->i_nlink);
2308 ocfs2_journal_dirty(handle, di_bh);
2309
2310 status = ocfs2_add_entry(handle, dentry, inode,
2311 OCFS2_I(inode)->ip_blkno, parent_di_bh,
2312 &lookup);
2313 if (status < 0) {
2314 mlog_errno(status);
2315 goto out_commit;
2316 }
2317
2318 status = ocfs2_dentry_attach_lock(dentry, inode,
2319 OCFS2_I(dir)->ip_blkno);
2320 if (status) {
2321 mlog_errno(status);
2322 goto out_commit;
2323 }
2324
2325 dentry->d_op = &ocfs2_dentry_ops;
2326 d_instantiate(dentry, inode);
2327 status = 0;
2328 out_commit:
2329 ocfs2_commit_trans(osb, handle);
2330 orphan_unlock:
2331 ocfs2_inode_unlock(orphan_dir_inode, 1);
2332 mutex_unlock(&orphan_dir_inode->i_mutex);
2333 iput(orphan_dir_inode);
2334 leave:
2335
2336 ocfs2_inode_unlock(dir, 1);
2337
2338 brelse(di_bh);
2339 brelse(parent_di_bh);
2340 brelse(orphan_dir_bh);
2341
2342 ocfs2_free_dir_lookup_result(&lookup);
2343
2344 mlog_exit(status);
2345
2346 return status;
2347 }
2348
2349 const struct inode_operations ocfs2_dir_iops = {
2350 .create = ocfs2_create,
2351 .lookup = ocfs2_lookup,
2352 .link = ocfs2_link,
2353 .unlink = ocfs2_unlink,
2354 .rmdir = ocfs2_unlink,
2355 .symlink = ocfs2_symlink,
2356 .mkdir = ocfs2_mkdir,
2357 .mknod = ocfs2_mknod,
2358 .rename = ocfs2_rename,
2359 .setattr = ocfs2_setattr,
2360 .getattr = ocfs2_getattr,
2361 .permission = ocfs2_permission,
2362 .setxattr = generic_setxattr,
2363 .getxattr = generic_getxattr,
2364 .listxattr = ocfs2_listxattr,
2365 .removexattr = generic_removexattr,
2366 .fiemap = ocfs2_fiemap,
2367 };
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree