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OMAP3: PM: move context-loss counting into OMAP PM
[linux-ginger.git] / fs / ocfs2 / namei.c
blobf010b22b1c4412046a56c24c100efdf032ddf52d
1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * namei.c
5 *
6 * Create and rename file, directory, symlinks
7 *
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
9 *
10 * Portions of this code from linux/fs/ext3/dir.c
11 *
12 * Copyright (C) 1992, 1993, 1994, 1995
13 * Remy Card (card@masi.ibp.fr)
14 * Laboratoire MASI - Institut Blaise pascal
15 * Universite Pierre et Marie Curie (Paris VI)
16 *
17 * from
18 *
19 * linux/fs/minix/dir.c
20 *
21 * Copyright (C) 1991, 1992 Linux Torvalds
22 *
23 * This program is free software; you can redistribute it and/or
24 * modify it under the terms of the GNU General Public
25 * License as published by the Free Software Foundation; either
26 * version 2 of the License, or (at your option) any later version.
27 *
28 * This program is distributed in the hope that it will be useful,
29 * but WITHOUT ANY WARRANTY; without even the implied warranty of
30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
31 * General Public License for more details.
32 *
33 * You should have received a copy of the GNU General Public
34 * License along with this program; if not, write to the
35 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
36 * Boston, MA 021110-1307, USA.
37 */
38
39 #include <linux/fs.h>
40 #include <linux/types.h>
41 #include <linux/slab.h>
42 #include <linux/highmem.h>
43 #include <linux/quotaops.h>
44
45 #define MLOG_MASK_PREFIX ML_NAMEI
46 #include <cluster/masklog.h>
47
48 #include "ocfs2.h"
49
50 #include "alloc.h"
51 #include "dcache.h"
52 #include "dir.h"
53 #include "dlmglue.h"
54 #include "extent_map.h"
55 #include "file.h"
56 #include "inode.h"
57 #include "journal.h"
58 #include "namei.h"
59 #include "suballoc.h"
60 #include "super.h"
61 #include "symlink.h"
62 #include "sysfile.h"
63 #include "uptodate.h"
64 #include "xattr.h"
65 #include "acl.h"
66
67 #include "buffer_head_io.h"
68
69 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
70 struct inode *dir,
71 struct inode *inode,
72 dev_t dev,
73 struct buffer_head **new_fe_bh,
74 struct buffer_head *parent_fe_bh,
75 handle_t *handle,
76 struct ocfs2_alloc_context *inode_ac);
77
78 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
79 struct inode **ret_orphan_dir,
80 u64 blkno,
81 char *name,
82 struct ocfs2_dir_lookup_result *lookup);
83
84 static int ocfs2_orphan_add(struct ocfs2_super *osb,
85 handle_t *handle,
86 struct inode *inode,
87 struct ocfs2_dinode *fe,
88 char *name,
89 struct ocfs2_dir_lookup_result *lookup,
90 struct inode *orphan_dir_inode);
91
92 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
93 handle_t *handle,
94 struct inode *inode,
95 const char *symname);
96
97 /* An orphan dir name is an 8 byte value, printed as a hex string */
98 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
99
100 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
101 struct nameidata *nd)
102 {
103 int status;
104 u64 blkno;
105 struct inode *inode = NULL;
106 struct dentry *ret;
107 struct ocfs2_inode_info *oi;
108
109 mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
110 dentry->d_name.len, dentry->d_name.name);
111
112 if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
113 ret = ERR_PTR(-ENAMETOOLONG);
114 goto bail;
115 }
116
117 mlog(0, "find name %.*s in directory %llu\n", dentry->d_name.len,
118 dentry->d_name.name, (unsigned long long)OCFS2_I(dir)->ip_blkno);
119
120 status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
121 if (status < 0) {
122 if (status != -ENOENT)
123 mlog_errno(status);
124 ret = ERR_PTR(status);
125 goto bail;
126 }
127
128 status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
129 dentry->d_name.len, &blkno);
130 if (status < 0)
131 goto bail_add;
132
133 inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
134 if (IS_ERR(inode)) {
135 ret = ERR_PTR(-EACCES);
136 goto bail_unlock;
137 }
138
139 oi = OCFS2_I(inode);
140 /* Clear any orphaned state... If we were able to look up the
141 * inode from a directory, it certainly can't be orphaned. We
142 * might have the bad state from a node which intended to
143 * orphan this inode but crashed before it could commit the
144 * unlink. */
145 spin_lock(&oi->ip_lock);
146 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
147 spin_unlock(&oi->ip_lock);
148
149 bail_add:
150 dentry->d_op = &ocfs2_dentry_ops;
151 ret = d_splice_alias(inode, dentry);
152
153 if (inode) {
154 /*
155 * If d_splice_alias() finds a DCACHE_DISCONNECTED
156 * dentry, it will d_move() it on top of ourse. The
157 * return value will indicate this however, so in
158 * those cases, we switch them around for the locking
159 * code.
160 *
161 * NOTE: This dentry already has ->d_op set from
162 * ocfs2_get_parent() and ocfs2_get_dentry()
163 */
164 if (ret)
165 dentry = ret;
166
167 status = ocfs2_dentry_attach_lock(dentry, inode,
168 OCFS2_I(dir)->ip_blkno);
169 if (status) {
170 mlog_errno(status);
171 ret = ERR_PTR(status);
172 goto bail_unlock;
173 }
174 }
175
176 bail_unlock:
177 /* Don't drop the cluster lock until *after* the d_add --
178 * unlink on another node will message us to remove that
179 * dentry under this lock so otherwise we can race this with
180 * the downconvert thread and have a stale dentry. */
181 ocfs2_inode_unlock(dir, 0);
182
183 bail:
184
185 mlog_exit_ptr(ret);
186
187 return ret;
188 }
189
190 static struct inode *ocfs2_get_init_inode(struct inode *dir, int mode)
191 {
192 struct inode *inode;
193
194 inode = new_inode(dir->i_sb);
195 if (!inode) {
196 mlog(ML_ERROR, "new_inode failed!\n");
197 return NULL;
198 }
199
200 /* populate as many fields early on as possible - many of
201 * these are used by the support functions here and in
202 * callers. */
203 if (S_ISDIR(mode))
204 inode->i_nlink = 2;
205 else
206 inode->i_nlink = 1;
207 inode->i_uid = current_fsuid();
208 if (dir->i_mode & S_ISGID) {
209 inode->i_gid = dir->i_gid;
210 if (S_ISDIR(mode))
211 mode |= S_ISGID;
212 } else
213 inode->i_gid = current_fsgid();
214 inode->i_mode = mode;
215 vfs_dq_init(inode);
216 return inode;
217 }
218
219 static int ocfs2_mknod(struct inode *dir,
220 struct dentry *dentry,
221 int mode,
222 dev_t dev)
223 {
224 int status = 0;
225 struct buffer_head *parent_fe_bh = NULL;
226 handle_t *handle = NULL;
227 struct ocfs2_super *osb;
228 struct ocfs2_dinode *dirfe;
229 struct buffer_head *new_fe_bh = NULL;
230 struct inode *inode = NULL;
231 struct ocfs2_alloc_context *inode_ac = NULL;
232 struct ocfs2_alloc_context *data_ac = NULL;
233 struct ocfs2_alloc_context *meta_ac = NULL;
234 int want_clusters = 0;
235 int want_meta = 0;
236 int xattr_credits = 0;
237 struct ocfs2_security_xattr_info si = {
238 .enable = 1,
239 };
240 int did_quota_inode = 0;
241 struct ocfs2_dir_lookup_result lookup = { NULL, };
242
243 mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode,
244 (unsigned long)dev, dentry->d_name.len,
245 dentry->d_name.name);
246
247 /* get our super block */
248 osb = OCFS2_SB(dir->i_sb);
249
250 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
251 if (status < 0) {
252 if (status != -ENOENT)
253 mlog_errno(status);
254 return status;
255 }
256
257 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
258 status = -EMLINK;
259 goto leave;
260 }
261
262 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
263 if (!ocfs2_read_links_count(dirfe)) {
264 /* can't make a file in a deleted directory. */
265 status = -ENOENT;
266 goto leave;
267 }
268
269 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
270 dentry->d_name.len);
271 if (status)
272 goto leave;
273
274 /* get a spot inside the dir. */
275 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
276 dentry->d_name.name,
277 dentry->d_name.len, &lookup);
278 if (status < 0) {
279 mlog_errno(status);
280 goto leave;
281 }
282
283 /* reserve an inode spot */
284 status = ocfs2_reserve_new_inode(osb, &inode_ac);
285 if (status < 0) {
286 if (status != -ENOSPC)
287 mlog_errno(status);
288 goto leave;
289 }
290
291 inode = ocfs2_get_init_inode(dir, mode);
292 if (!inode) {
293 status = -ENOMEM;
294 mlog_errno(status);
295 goto leave;
296 }
297
298 /* get security xattr */
299 status = ocfs2_init_security_get(inode, dir, &si);
300 if (status) {
301 if (status == -EOPNOTSUPP)
302 si.enable = 0;
303 else {
304 mlog_errno(status);
305 goto leave;
306 }
307 }
308
309 /* calculate meta data/clusters for setting security and acl xattr */
310 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
311 &si, &want_clusters,
312 &xattr_credits, &want_meta);
313 if (status < 0) {
314 mlog_errno(status);
315 goto leave;
316 }
317
318 /* Reserve a cluster if creating an extent based directory. */
319 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
320 want_clusters += 1;
321
322 /* Dir indexing requires extra space as well */
323 if (ocfs2_supports_indexed_dirs(osb))
324 want_meta++;
325 }
326
327 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
328 if (status < 0) {
329 if (status != -ENOSPC)
330 mlog_errno(status);
331 goto leave;
332 }
333
334 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
335 if (status < 0) {
336 if (status != -ENOSPC)
337 mlog_errno(status);
338 goto leave;
339 }
340
341 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
342 S_ISDIR(mode),
343 xattr_credits));
344 if (IS_ERR(handle)) {
345 status = PTR_ERR(handle);
346 handle = NULL;
347 mlog_errno(status);
348 goto leave;
349 }
350
351 /* We don't use standard VFS wrapper because we don't want vfs_dq_init
352 * to be called. */
353 if (sb_any_quota_active(osb->sb) &&
354 osb->sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA) {
355 status = -EDQUOT;
356 goto leave;
357 }
358 did_quota_inode = 1;
359
360 mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry,
361 inode->i_mode, (unsigned long)dev, dentry->d_name.len,
362 dentry->d_name.name);
363
364 /* do the real work now. */
365 status = ocfs2_mknod_locked(osb, dir, inode, dev,
366 &new_fe_bh, parent_fe_bh, handle,
367 inode_ac);
368 if (status < 0) {
369 mlog_errno(status);
370 goto leave;
371 }
372
373 if (S_ISDIR(mode)) {
374 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
375 new_fe_bh, data_ac, meta_ac);
376 if (status < 0) {
377 mlog_errno(status);
378 goto leave;
379 }
380
381 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
382 parent_fe_bh,
383 OCFS2_JOURNAL_ACCESS_WRITE);
384 if (status < 0) {
385 mlog_errno(status);
386 goto leave;
387 }
388 ocfs2_add_links_count(dirfe, 1);
389 status = ocfs2_journal_dirty(handle, parent_fe_bh);
390 if (status < 0) {
391 mlog_errno(status);
392 goto leave;
393 }
394 inc_nlink(dir);
395 }
396
397 status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
398 meta_ac, data_ac);
399 if (status < 0) {
400 mlog_errno(status);
401 goto leave;
402 }
403
404 if (si.enable) {
405 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
406 meta_ac, data_ac);
407 if (status < 0) {
408 mlog_errno(status);
409 goto leave;
410 }
411 }
412
413 status = ocfs2_add_entry(handle, dentry, inode,
414 OCFS2_I(inode)->ip_blkno, parent_fe_bh,
415 &lookup);
416 if (status < 0) {
417 mlog_errno(status);
418 goto leave;
419 }
420
421 status = ocfs2_dentry_attach_lock(dentry, inode,
422 OCFS2_I(dir)->ip_blkno);
423 if (status) {
424 mlog_errno(status);
425 goto leave;
426 }
427
428 insert_inode_hash(inode);
429 dentry->d_op = &ocfs2_dentry_ops;
430 d_instantiate(dentry, inode);
431 status = 0;
432 leave:
433 if (status < 0 && did_quota_inode)
434 vfs_dq_free_inode(inode);
435 if (handle)
436 ocfs2_commit_trans(osb, handle);
437
438 ocfs2_inode_unlock(dir, 1);
439
440 if (status == -ENOSPC)
441 mlog(0, "Disk is full\n");
442
443 brelse(new_fe_bh);
444 brelse(parent_fe_bh);
445 kfree(si.name);
446 kfree(si.value);
447
448 ocfs2_free_dir_lookup_result(&lookup);
449
450 if ((status < 0) && inode) {
451 clear_nlink(inode);
452 iput(inode);
453 }
454
455 if (inode_ac)
456 ocfs2_free_alloc_context(inode_ac);
457
458 if (data_ac)
459 ocfs2_free_alloc_context(data_ac);
460
461 if (meta_ac)
462 ocfs2_free_alloc_context(meta_ac);
463
464 mlog_exit(status);
465
466 return status;
467 }
468
469 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
470 struct inode *dir,
471 struct inode *inode,
472 dev_t dev,
473 struct buffer_head **new_fe_bh,
474 struct buffer_head *parent_fe_bh,
475 handle_t *handle,
476 struct ocfs2_alloc_context *inode_ac)
477 {
478 int status = 0;
479 struct ocfs2_dinode *fe = NULL;
480 struct ocfs2_extent_list *fel;
481 u64 fe_blkno = 0;
482 u16 suballoc_bit;
483 u16 feat;
484
485 *new_fe_bh = NULL;
486
487 status = ocfs2_claim_new_inode(osb, handle, dir, parent_fe_bh,
488 inode_ac, &suballoc_bit, &fe_blkno);
489 if (status < 0) {
490 mlog_errno(status);
491 goto leave;
492 }
493
494 /* populate as many fields early on as possible - many of
495 * these are used by the support functions here and in
496 * callers. */
497 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
498 OCFS2_I(inode)->ip_blkno = fe_blkno;
499 spin_lock(&osb->osb_lock);
500 inode->i_generation = osb->s_next_generation++;
501 spin_unlock(&osb->osb_lock);
502
503 *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
504 if (!*new_fe_bh) {
505 status = -EIO;
506 mlog_errno(status);
507 goto leave;
508 }
509 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
510
511 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
512 *new_fe_bh,
513 OCFS2_JOURNAL_ACCESS_CREATE);
514 if (status < 0) {
515 mlog_errno(status);
516 goto leave;
517 }
518
519 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
520 memset(fe, 0, osb->sb->s_blocksize);
521
522 fe->i_generation = cpu_to_le32(inode->i_generation);
523 fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
524 fe->i_blkno = cpu_to_le64(fe_blkno);
525 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
526 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
527 fe->i_uid = cpu_to_le32(inode->i_uid);
528 fe->i_gid = cpu_to_le32(inode->i_gid);
529 fe->i_mode = cpu_to_le16(inode->i_mode);
530 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
531 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
532
533 ocfs2_set_links_count(fe, inode->i_nlink);
534
535 fe->i_last_eb_blk = 0;
536 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
537 le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL);
538 fe->i_atime = fe->i_ctime = fe->i_mtime =
539 cpu_to_le64(CURRENT_TIME.tv_sec);
540 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
541 cpu_to_le32(CURRENT_TIME.tv_nsec);
542 fe->i_dtime = 0;
543
544 /*
545 * If supported, directories start with inline data. If inline
546 * isn't supported, but indexing is, we start them as indexed.
547 */
548 feat = le16_to_cpu(fe->i_dyn_features);
549 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
550 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
551
552 fe->id2.i_data.id_count = cpu_to_le16(
553 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
554 } else {
555 fel = &fe->id2.i_list;
556 fel->l_tree_depth = 0;
557 fel->l_next_free_rec = 0;
558 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
559 }
560
561 status = ocfs2_journal_dirty(handle, *new_fe_bh);
562 if (status < 0) {
563 mlog_errno(status);
564 goto leave;
565 }
566
567 ocfs2_populate_inode(inode, fe, 1);
568 ocfs2_ci_set_new(osb, INODE_CACHE(inode));
569 if (!ocfs2_mount_local(osb)) {
570 status = ocfs2_create_new_inode_locks(inode);
571 if (status < 0)
572 mlog_errno(status);
573 }
574
575 status = 0; /* error in ocfs2_create_new_inode_locks is not
576 * critical */
577
578 leave:
579 if (status < 0) {
580 if (*new_fe_bh) {
581 brelse(*new_fe_bh);
582 *new_fe_bh = NULL;
583 }
584 }
585
586 mlog_exit(status);
587 return status;
588 }
589
590 static int ocfs2_mkdir(struct inode *dir,
591 struct dentry *dentry,
592 int mode)
593 {
594 int ret;
595
596 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
597 dentry->d_name.len, dentry->d_name.name);
598 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
599 mlog_exit(ret);
600
601 return ret;
602 }
603
604 static int ocfs2_create(struct inode *dir,
605 struct dentry *dentry,
606 int mode,
607 struct nameidata *nd)
608 {
609 int ret;
610
611 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
612 dentry->d_name.len, dentry->d_name.name);
613 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
614 mlog_exit(ret);
615
616 return ret;
617 }
618
619 static int ocfs2_link(struct dentry *old_dentry,
620 struct inode *dir,
621 struct dentry *dentry)
622 {
623 handle_t *handle;
624 struct inode *inode = old_dentry->d_inode;
625 int err;
626 struct buffer_head *fe_bh = NULL;
627 struct buffer_head *parent_fe_bh = NULL;
628 struct ocfs2_dinode *fe = NULL;
629 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
630 struct ocfs2_dir_lookup_result lookup = { NULL, };
631
632 mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino,
633 old_dentry->d_name.len, old_dentry->d_name.name,
634 dentry->d_name.len, dentry->d_name.name);
635
636 if (S_ISDIR(inode->i_mode))
637 return -EPERM;
638
639 err = ocfs2_inode_lock_nested(dir, &parent_fe_bh, 1, OI_LS_PARENT);
640 if (err < 0) {
641 if (err != -ENOENT)
642 mlog_errno(err);
643 return err;
644 }
645
646 if (!dir->i_nlink) {
647 err = -ENOENT;
648 goto out;
649 }
650
651 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
652 dentry->d_name.len);
653 if (err)
654 goto out;
655
656 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
657 dentry->d_name.name,
658 dentry->d_name.len, &lookup);
659 if (err < 0) {
660 mlog_errno(err);
661 goto out;
662 }
663
664 err = ocfs2_inode_lock(inode, &fe_bh, 1);
665 if (err < 0) {
666 if (err != -ENOENT)
667 mlog_errno(err);
668 goto out;
669 }
670
671 fe = (struct ocfs2_dinode *) fe_bh->b_data;
672 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
673 err = -EMLINK;
674 goto out_unlock_inode;
675 }
676
677 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
678 if (IS_ERR(handle)) {
679 err = PTR_ERR(handle);
680 handle = NULL;
681 mlog_errno(err);
682 goto out_unlock_inode;
683 }
684
685 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
686 OCFS2_JOURNAL_ACCESS_WRITE);
687 if (err < 0) {
688 mlog_errno(err);
689 goto out_commit;
690 }
691
692 inc_nlink(inode);
693 inode->i_ctime = CURRENT_TIME;
694 ocfs2_set_links_count(fe, inode->i_nlink);
695 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
696 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
697
698 err = ocfs2_journal_dirty(handle, fe_bh);
699 if (err < 0) {
700 ocfs2_add_links_count(fe, -1);
701 drop_nlink(inode);
702 mlog_errno(err);
703 goto out_commit;
704 }
705
706 err = ocfs2_add_entry(handle, dentry, inode,
707 OCFS2_I(inode)->ip_blkno,
708 parent_fe_bh, &lookup);
709 if (err) {
710 ocfs2_add_links_count(fe, -1);
711 drop_nlink(inode);
712 mlog_errno(err);
713 goto out_commit;
714 }
715
716 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
717 if (err) {
718 mlog_errno(err);
719 goto out_commit;
720 }
721
722 atomic_inc(&inode->i_count);
723 dentry->d_op = &ocfs2_dentry_ops;
724 d_instantiate(dentry, inode);
725
726 out_commit:
727 ocfs2_commit_trans(osb, handle);
728 out_unlock_inode:
729 ocfs2_inode_unlock(inode, 1);
730
731 out:
732 ocfs2_inode_unlock(dir, 1);
733
734 brelse(fe_bh);
735 brelse(parent_fe_bh);
736
737 ocfs2_free_dir_lookup_result(&lookup);
738
739 mlog_exit(err);
740
741 return err;
742 }
743
744 /*
745 * Takes and drops an exclusive lock on the given dentry. This will
746 * force other nodes to drop it.
747 */
748 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
749 {
750 int ret;
751
752 ret = ocfs2_dentry_lock(dentry, 1);
753 if (ret)
754 mlog_errno(ret);
755 else
756 ocfs2_dentry_unlock(dentry, 1);
757
758 return ret;
759 }
760
761 static inline int inode_is_unlinkable(struct inode *inode)
762 {
763 if (S_ISDIR(inode->i_mode)) {
764 if (inode->i_nlink == 2)
765 return 1;
766 return 0;
767 }
768
769 if (inode->i_nlink == 1)
770 return 1;
771 return 0;
772 }
773
774 static int ocfs2_unlink(struct inode *dir,
775 struct dentry *dentry)
776 {
777 int status;
778 int child_locked = 0;
779 struct inode *inode = dentry->d_inode;
780 struct inode *orphan_dir = NULL;
781 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
782 u64 blkno;
783 struct ocfs2_dinode *fe = NULL;
784 struct buffer_head *fe_bh = NULL;
785 struct buffer_head *parent_node_bh = NULL;
786 handle_t *handle = NULL;
787 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
788 struct ocfs2_dir_lookup_result lookup = { NULL, };
789 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
790
791 mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
792 dentry->d_name.len, dentry->d_name.name);
793
794 BUG_ON(dentry->d_parent->d_inode != dir);
795
796 mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno);
797
798 if (inode == osb->root_inode) {
799 mlog(0, "Cannot delete the root directory\n");
800 return -EPERM;
801 }
802
803 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
804 OI_LS_PARENT);
805 if (status < 0) {
806 if (status != -ENOENT)
807 mlog_errno(status);
808 return status;
809 }
810
811 status = ocfs2_find_files_on_disk(dentry->d_name.name,
812 dentry->d_name.len, &blkno, dir,
813 &lookup);
814 if (status < 0) {
815 if (status != -ENOENT)
816 mlog_errno(status);
817 goto leave;
818 }
819
820 if (OCFS2_I(inode)->ip_blkno != blkno) {
821 status = -ENOENT;
822
823 mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n",
824 (unsigned long long)OCFS2_I(inode)->ip_blkno,
825 (unsigned long long)blkno, OCFS2_I(inode)->ip_flags);
826 goto leave;
827 }
828
829 status = ocfs2_inode_lock(inode, &fe_bh, 1);
830 if (status < 0) {
831 if (status != -ENOENT)
832 mlog_errno(status);
833 goto leave;
834 }
835 child_locked = 1;
836
837 if (S_ISDIR(inode->i_mode)) {
838 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
839 status = -ENOTEMPTY;
840 goto leave;
841 }
842 }
843
844 status = ocfs2_remote_dentry_delete(dentry);
845 if (status < 0) {
846 /* This remote delete should succeed under all normal
847 * circumstances. */
848 mlog_errno(status);
849 goto leave;
850 }
851
852 if (inode_is_unlinkable(inode)) {
853 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
854 OCFS2_I(inode)->ip_blkno,
855 orphan_name, &orphan_insert);
856 if (status < 0) {
857 mlog_errno(status);
858 goto leave;
859 }
860 }
861
862 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
863 if (IS_ERR(handle)) {
864 status = PTR_ERR(handle);
865 handle = NULL;
866 mlog_errno(status);
867 goto leave;
868 }
869
870 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
871 OCFS2_JOURNAL_ACCESS_WRITE);
872 if (status < 0) {
873 mlog_errno(status);
874 goto leave;
875 }
876
877 fe = (struct ocfs2_dinode *) fe_bh->b_data;
878
879 if (inode_is_unlinkable(inode)) {
880 status = ocfs2_orphan_add(osb, handle, inode, fe, orphan_name,
881 &orphan_insert, orphan_dir);
882 if (status < 0) {
883 mlog_errno(status);
884 goto leave;
885 }
886 }
887
888 /* delete the name from the parent dir */
889 status = ocfs2_delete_entry(handle, dir, &lookup);
890 if (status < 0) {
891 mlog_errno(status);
892 goto leave;
893 }
894
895 if (S_ISDIR(inode->i_mode))
896 drop_nlink(inode);
897 drop_nlink(inode);
898 ocfs2_set_links_count(fe, inode->i_nlink);
899
900 status = ocfs2_journal_dirty(handle, fe_bh);
901 if (status < 0) {
902 mlog_errno(status);
903 goto leave;
904 }
905
906 dir->i_ctime = dir->i_mtime = CURRENT_TIME;
907 if (S_ISDIR(inode->i_mode))
908 drop_nlink(dir);
909
910 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
911 if (status < 0) {
912 mlog_errno(status);
913 if (S_ISDIR(inode->i_mode))
914 inc_nlink(dir);
915 }
916
917 leave:
918 if (handle)
919 ocfs2_commit_trans(osb, handle);
920
921 if (child_locked)
922 ocfs2_inode_unlock(inode, 1);
923
924 ocfs2_inode_unlock(dir, 1);
925
926 if (orphan_dir) {
927 /* This was locked for us in ocfs2_prepare_orphan_dir() */
928 ocfs2_inode_unlock(orphan_dir, 1);
929 mutex_unlock(&orphan_dir->i_mutex);
930 iput(orphan_dir);
931 }
932
933 brelse(fe_bh);
934 brelse(parent_node_bh);
935
936 ocfs2_free_dir_lookup_result(&orphan_insert);
937 ocfs2_free_dir_lookup_result(&lookup);
938
939 mlog_exit(status);
940
941 return status;
942 }
943
944 /*
945 * The only place this should be used is rename!
946 * if they have the same id, then the 1st one is the only one locked.
947 */
948 static int ocfs2_double_lock(struct ocfs2_super *osb,
949 struct buffer_head **bh1,
950 struct inode *inode1,
951 struct buffer_head **bh2,
952 struct inode *inode2)
953 {
954 int status;
955 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
956 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
957 struct buffer_head **tmpbh;
958 struct inode *tmpinode;
959
960 mlog_entry("(inode1 = %llu, inode2 = %llu)\n",
961 (unsigned long long)oi1->ip_blkno,
962 (unsigned long long)oi2->ip_blkno);
963
964 if (*bh1)
965 *bh1 = NULL;
966 if (*bh2)
967 *bh2 = NULL;
968
969 /* we always want to lock the one with the lower lockid first. */
970 if (oi1->ip_blkno != oi2->ip_blkno) {
971 if (oi1->ip_blkno < oi2->ip_blkno) {
972 /* switch id1 and id2 around */
973 mlog(0, "switching them around...\n");
974 tmpbh = bh2;
975 bh2 = bh1;
976 bh1 = tmpbh;
977
978 tmpinode = inode2;
979 inode2 = inode1;
980 inode1 = tmpinode;
981 }
982 /* lock id2 */
983 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
984 OI_LS_RENAME1);
985 if (status < 0) {
986 if (status != -ENOENT)
987 mlog_errno(status);
988 goto bail;
989 }
990 }
991
992 /* lock id1 */
993 status = ocfs2_inode_lock_nested(inode1, bh1, 1, OI_LS_RENAME2);
994 if (status < 0) {
995 /*
996 * An error return must mean that no cluster locks
997 * were held on function exit.
998 */
999 if (oi1->ip_blkno != oi2->ip_blkno)
1000 ocfs2_inode_unlock(inode2, 1);
1001
1002 if (status != -ENOENT)
1003 mlog_errno(status);
1004 }
1005
1006 bail:
1007 mlog_exit(status);
1008 return status;
1009 }
1010
1011 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1012 {
1013 ocfs2_inode_unlock(inode1, 1);
1014
1015 if (inode1 != inode2)
1016 ocfs2_inode_unlock(inode2, 1);
1017 }
1018
1019 static int ocfs2_rename(struct inode *old_dir,
1020 struct dentry *old_dentry,
1021 struct inode *new_dir,
1022 struct dentry *new_dentry)
1023 {
1024 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1025 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1026 struct inode *old_inode = old_dentry->d_inode;
1027 struct inode *new_inode = new_dentry->d_inode;
1028 struct inode *orphan_dir = NULL;
1029 struct ocfs2_dinode *newfe = NULL;
1030 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1031 struct buffer_head *newfe_bh = NULL;
1032 struct buffer_head *old_inode_bh = NULL;
1033 struct ocfs2_super *osb = NULL;
1034 u64 newfe_blkno, old_de_ino;
1035 handle_t *handle = NULL;
1036 struct buffer_head *old_dir_bh = NULL;
1037 struct buffer_head *new_dir_bh = NULL;
1038 nlink_t old_dir_nlink = old_dir->i_nlink;
1039 struct ocfs2_dinode *old_di;
1040 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1041 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1042 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1043 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1044 struct ocfs2_dir_lookup_result target_insert = { NULL, };
1045
1046 /* At some point it might be nice to break this function up a
1047 * bit. */
1048
1049 mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n",
1050 old_dir, old_dentry, new_dir, new_dentry,
1051 old_dentry->d_name.len, old_dentry->d_name.name,
1052 new_dentry->d_name.len, new_dentry->d_name.name);
1053
1054 osb = OCFS2_SB(old_dir->i_sb);
1055
1056 if (new_inode) {
1057 if (!igrab(new_inode))
1058 BUG();
1059 }
1060
1061 /* Assume a directory hierarchy thusly:
1062 * a/b/c
1063 * a/d
1064 * a,b,c, and d are all directories.
1065 *
1066 * from cwd of 'a' on both nodes:
1067 * node1: mv b/c d
1068 * node2: mv d b/c
1069 *
1070 * And that's why, just like the VFS, we need a file system
1071 * rename lock. */
1072 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1073 status = ocfs2_rename_lock(osb);
1074 if (status < 0) {
1075 mlog_errno(status);
1076 goto bail;
1077 }
1078 rename_lock = 1;
1079 }
1080
1081 /* if old and new are the same, this'll just do one lock. */
1082 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1083 &new_dir_bh, new_dir);
1084 if (status < 0) {
1085 mlog_errno(status);
1086 goto bail;
1087 }
1088 parents_locked = 1;
1089
1090 /* make sure both dirs have bhs
1091 * get an extra ref on old_dir_bh if old==new */
1092 if (!new_dir_bh) {
1093 if (old_dir_bh) {
1094 new_dir_bh = old_dir_bh;
1095 get_bh(new_dir_bh);
1096 } else {
1097 mlog(ML_ERROR, "no old_dir_bh!\n");
1098 status = -EIO;
1099 goto bail;
1100 }
1101 }
1102
1103 /*
1104 * Aside from allowing a meta data update, the locking here
1105 * also ensures that the downconvert thread on other nodes
1106 * won't have to concurrently downconvert the inode and the
1107 * dentry locks.
1108 */
1109 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1110 OI_LS_PARENT);
1111 if (status < 0) {
1112 if (status != -ENOENT)
1113 mlog_errno(status);
1114 goto bail;
1115 }
1116 old_child_locked = 1;
1117
1118 status = ocfs2_remote_dentry_delete(old_dentry);
1119 if (status < 0) {
1120 mlog_errno(status);
1121 goto bail;
1122 }
1123
1124 if (S_ISDIR(old_inode->i_mode)) {
1125 u64 old_inode_parent;
1126
1127 update_dot_dot = 1;
1128 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1129 old_inode,
1130 &old_inode_dot_dot_res);
1131 if (status) {
1132 status = -EIO;
1133 goto bail;
1134 }
1135
1136 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1137 status = -EIO;
1138 goto bail;
1139 }
1140
1141 if (!new_inode && new_dir != old_dir &&
1142 new_dir->i_nlink >= ocfs2_link_max(osb)) {
1143 status = -EMLINK;
1144 goto bail;
1145 }
1146 }
1147
1148 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1149 old_dentry->d_name.len,
1150 &old_de_ino);
1151 if (status) {
1152 status = -ENOENT;
1153 goto bail;
1154 }
1155
1156 /*
1157 * Check for inode number is _not_ due to possible IO errors.
1158 * We might rmdir the source, keep it as pwd of some process
1159 * and merrily kill the link to whatever was created under the
1160 * same name. Goodbye sticky bit ;-<
1161 */
1162 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1163 status = -ENOENT;
1164 goto bail;
1165 }
1166
1167 /* check if the target already exists (in which case we need
1168 * to delete it */
1169 status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1170 new_dentry->d_name.len,
1171 &newfe_blkno, new_dir,
1172 &target_lookup_res);
1173 /* The only error we allow here is -ENOENT because the new
1174 * file not existing is perfectly valid. */
1175 if ((status < 0) && (status != -ENOENT)) {
1176 /* If we cannot find the file specified we should just */
1177 /* return the error... */
1178 mlog_errno(status);
1179 goto bail;
1180 }
1181 if (status == 0)
1182 target_exists = 1;
1183
1184 if (!target_exists && new_inode) {
1185 /*
1186 * Target was unlinked by another node while we were
1187 * waiting to get to ocfs2_rename(). There isn't
1188 * anything we can do here to help the situation, so
1189 * bubble up the appropriate error.
1190 */
1191 status = -ENOENT;
1192 goto bail;
1193 }
1194
1195 /* In case we need to overwrite an existing file, we blow it
1196 * away first */
1197 if (target_exists) {
1198 /* VFS didn't think there existed an inode here, but
1199 * someone else in the cluster must have raced our
1200 * rename to create one. Today we error cleanly, in
1201 * the future we should consider calling iget to build
1202 * a new struct inode for this entry. */
1203 if (!new_inode) {
1204 status = -EACCES;
1205
1206 mlog(0, "We found an inode for name %.*s but VFS "
1207 "didn't give us one.\n", new_dentry->d_name.len,
1208 new_dentry->d_name.name);
1209 goto bail;
1210 }
1211
1212 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1213 status = -EACCES;
1214
1215 mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n",
1216 (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1217 (unsigned long long)newfe_blkno,
1218 OCFS2_I(new_inode)->ip_flags);
1219 goto bail;
1220 }
1221
1222 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1223 if (status < 0) {
1224 if (status != -ENOENT)
1225 mlog_errno(status);
1226 goto bail;
1227 }
1228 new_child_locked = 1;
1229
1230 status = ocfs2_remote_dentry_delete(new_dentry);
1231 if (status < 0) {
1232 mlog_errno(status);
1233 goto bail;
1234 }
1235
1236 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1237
1238 mlog(0, "aha rename over existing... new_blkno=%llu "
1239 "newfebh=%p bhblocknr=%llu\n",
1240 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1241 (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1242
1243 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1244 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1245 OCFS2_I(new_inode)->ip_blkno,
1246 orphan_name, &orphan_insert);
1247 if (status < 0) {
1248 mlog_errno(status);
1249 goto bail;
1250 }
1251 }
1252 } else {
1253 BUG_ON(new_dentry->d_parent->d_inode != new_dir);
1254
1255 status = ocfs2_check_dir_for_entry(new_dir,
1256 new_dentry->d_name.name,
1257 new_dentry->d_name.len);
1258 if (status)
1259 goto bail;
1260
1261 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1262 new_dentry->d_name.name,
1263 new_dentry->d_name.len,
1264 &target_insert);
1265 if (status < 0) {
1266 mlog_errno(status);
1267 goto bail;
1268 }
1269 }
1270
1271 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1272 if (IS_ERR(handle)) {
1273 status = PTR_ERR(handle);
1274 handle = NULL;
1275 mlog_errno(status);
1276 goto bail;
1277 }
1278
1279 if (target_exists) {
1280 if (S_ISDIR(new_inode->i_mode)) {
1281 if (new_inode->i_nlink != 2 ||
1282 !ocfs2_empty_dir(new_inode)) {
1283 status = -ENOTEMPTY;
1284 goto bail;
1285 }
1286 }
1287 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1288 newfe_bh,
1289 OCFS2_JOURNAL_ACCESS_WRITE);
1290 if (status < 0) {
1291 mlog_errno(status);
1292 goto bail;
1293 }
1294
1295 if (S_ISDIR(new_inode->i_mode) ||
1296 (ocfs2_read_links_count(newfe) == 1)) {
1297 status = ocfs2_orphan_add(osb, handle, new_inode,
1298 newfe, orphan_name,
1299 &orphan_insert, orphan_dir);
1300 if (status < 0) {
1301 mlog_errno(status);
1302 goto bail;
1303 }
1304 }
1305
1306 /* change the dirent to point to the correct inode */
1307 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1308 old_inode);
1309 if (status < 0) {
1310 mlog_errno(status);
1311 goto bail;
1312 }
1313 new_dir->i_version++;
1314
1315 if (S_ISDIR(new_inode->i_mode))
1316 ocfs2_set_links_count(newfe, 0);
1317 else
1318 ocfs2_add_links_count(newfe, -1);
1319
1320 status = ocfs2_journal_dirty(handle, newfe_bh);
1321 if (status < 0) {
1322 mlog_errno(status);
1323 goto bail;
1324 }
1325 } else {
1326 /* if the name was not found in new_dir, add it now */
1327 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1328 OCFS2_I(old_inode)->ip_blkno,
1329 new_dir_bh, &target_insert);
1330 }
1331
1332 old_inode->i_ctime = CURRENT_TIME;
1333 mark_inode_dirty(old_inode);
1334
1335 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1336 old_inode_bh,
1337 OCFS2_JOURNAL_ACCESS_WRITE);
1338 if (status >= 0) {
1339 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1340
1341 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1342 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1343
1344 status = ocfs2_journal_dirty(handle, old_inode_bh);
1345 if (status < 0)
1346 mlog_errno(status);
1347 } else
1348 mlog_errno(status);
1349
1350 /*
1351 * Now that the name has been added to new_dir, remove the old name.
1352 *
1353 * We don't keep any directory entry context around until now
1354 * because the insert might have changed the type of directory
1355 * we're dealing with.
1356 */
1357 status = ocfs2_find_entry(old_dentry->d_name.name,
1358 old_dentry->d_name.len, old_dir,
1359 &old_entry_lookup);
1360 if (status)
1361 goto bail;
1362
1363 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1364 if (status < 0) {
1365 mlog_errno(status);
1366 goto bail;
1367 }
1368
1369 if (new_inode) {
1370 new_inode->i_nlink--;
1371 new_inode->i_ctime = CURRENT_TIME;
1372 }
1373 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1374
1375 if (update_dot_dot) {
1376 status = ocfs2_update_entry(old_inode, handle,
1377 &old_inode_dot_dot_res, new_dir);
1378 old_dir->i_nlink--;
1379 if (new_inode) {
1380 new_inode->i_nlink--;
1381 } else {
1382 inc_nlink(new_dir);
1383 mark_inode_dirty(new_dir);
1384 }
1385 }
1386 mark_inode_dirty(old_dir);
1387 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1388 if (new_inode) {
1389 mark_inode_dirty(new_inode);
1390 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1391 }
1392
1393 if (old_dir != new_dir) {
1394 /* Keep the same times on both directories.*/
1395 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1396
1397 /*
1398 * This will also pick up the i_nlink change from the
1399 * block above.
1400 */
1401 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1402 }
1403
1404 if (old_dir_nlink != old_dir->i_nlink) {
1405 if (!old_dir_bh) {
1406 mlog(ML_ERROR, "need to change nlink for old dir "
1407 "%llu from %d to %d but bh is NULL!\n",
1408 (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1409 (int)old_dir_nlink, old_dir->i_nlink);
1410 } else {
1411 struct ocfs2_dinode *fe;
1412 status = ocfs2_journal_access_di(handle,
1413 INODE_CACHE(old_dir),
1414 old_dir_bh,
1415 OCFS2_JOURNAL_ACCESS_WRITE);
1416 fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1417 ocfs2_set_links_count(fe, old_dir->i_nlink);
1418 status = ocfs2_journal_dirty(handle, old_dir_bh);
1419 }
1420 }
1421 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1422 status = 0;
1423 bail:
1424 if (rename_lock)
1425 ocfs2_rename_unlock(osb);
1426
1427 if (handle)
1428 ocfs2_commit_trans(osb, handle);
1429
1430 if (parents_locked)
1431 ocfs2_double_unlock(old_dir, new_dir);
1432
1433 if (old_child_locked)
1434 ocfs2_inode_unlock(old_inode, 1);
1435
1436 if (new_child_locked)
1437 ocfs2_inode_unlock(new_inode, 1);
1438
1439 if (orphan_dir) {
1440 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1441 ocfs2_inode_unlock(orphan_dir, 1);
1442 mutex_unlock(&orphan_dir->i_mutex);
1443 iput(orphan_dir);
1444 }
1445
1446 if (new_inode)
1447 sync_mapping_buffers(old_inode->i_mapping);
1448
1449 if (new_inode)
1450 iput(new_inode);
1451
1452 ocfs2_free_dir_lookup_result(&target_lookup_res);
1453 ocfs2_free_dir_lookup_result(&old_entry_lookup);
1454 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1455 ocfs2_free_dir_lookup_result(&orphan_insert);
1456 ocfs2_free_dir_lookup_result(&target_insert);
1457
1458 brelse(newfe_bh);
1459 brelse(old_inode_bh);
1460 brelse(old_dir_bh);
1461 brelse(new_dir_bh);
1462
1463 mlog_exit(status);
1464
1465 return status;
1466 }
1467
1468 /*
1469 * we expect i_size = strlen(symname). Copy symname into the file
1470 * data, including the null terminator.
1471 */
1472 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1473 handle_t *handle,
1474 struct inode *inode,
1475 const char *symname)
1476 {
1477 struct buffer_head **bhs = NULL;
1478 const char *c;
1479 struct super_block *sb = osb->sb;
1480 u64 p_blkno, p_blocks;
1481 int virtual, blocks, status, i, bytes_left;
1482
1483 bytes_left = i_size_read(inode) + 1;
1484 /* we can't trust i_blocks because we're actually going to
1485 * write i_size + 1 bytes. */
1486 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1487
1488 mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n",
1489 (unsigned long long)inode->i_blocks,
1490 i_size_read(inode), blocks);
1491
1492 /* Sanity check -- make sure we're going to fit. */
1493 if (bytes_left >
1494 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1495 status = -EIO;
1496 mlog_errno(status);
1497 goto bail;
1498 }
1499
1500 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1501 if (!bhs) {
1502 status = -ENOMEM;
1503 mlog_errno(status);
1504 goto bail;
1505 }
1506
1507 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1508 NULL);
1509 if (status < 0) {
1510 mlog_errno(status);
1511 goto bail;
1512 }
1513
1514 /* links can never be larger than one cluster so we know this
1515 * is all going to be contiguous, but do a sanity check
1516 * anyway. */
1517 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1518 status = -EIO;
1519 mlog_errno(status);
1520 goto bail;
1521 }
1522
1523 virtual = 0;
1524 while(bytes_left > 0) {
1525 c = &symname[virtual * sb->s_blocksize];
1526
1527 bhs[virtual] = sb_getblk(sb, p_blkno);
1528 if (!bhs[virtual]) {
1529 status = -ENOMEM;
1530 mlog_errno(status);
1531 goto bail;
1532 }
1533 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1534 bhs[virtual]);
1535
1536 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1537 bhs[virtual],
1538 OCFS2_JOURNAL_ACCESS_CREATE);
1539 if (status < 0) {
1540 mlog_errno(status);
1541 goto bail;
1542 }
1543
1544 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1545
1546 memcpy(bhs[virtual]->b_data, c,
1547 (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1548 bytes_left);
1549
1550 status = ocfs2_journal_dirty(handle, bhs[virtual]);
1551 if (status < 0) {
1552 mlog_errno(status);
1553 goto bail;
1554 }
1555
1556 virtual++;
1557 p_blkno++;
1558 bytes_left -= sb->s_blocksize;
1559 }
1560
1561 status = 0;
1562 bail:
1563
1564 if (bhs) {
1565 for(i = 0; i < blocks; i++)
1566 brelse(bhs[i]);
1567 kfree(bhs);
1568 }
1569
1570 mlog_exit(status);
1571 return status;
1572 }
1573
1574 static int ocfs2_symlink(struct inode *dir,
1575 struct dentry *dentry,
1576 const char *symname)
1577 {
1578 int status, l, credits;
1579 u64 newsize;
1580 struct ocfs2_super *osb = NULL;
1581 struct inode *inode = NULL;
1582 struct super_block *sb;
1583 struct buffer_head *new_fe_bh = NULL;
1584 struct buffer_head *parent_fe_bh = NULL;
1585 struct ocfs2_dinode *fe = NULL;
1586 struct ocfs2_dinode *dirfe;
1587 handle_t *handle = NULL;
1588 struct ocfs2_alloc_context *inode_ac = NULL;
1589 struct ocfs2_alloc_context *data_ac = NULL;
1590 struct ocfs2_alloc_context *xattr_ac = NULL;
1591 int want_clusters = 0;
1592 int xattr_credits = 0;
1593 struct ocfs2_security_xattr_info si = {
1594 .enable = 1,
1595 };
1596 int did_quota = 0, did_quota_inode = 0;
1597 struct ocfs2_dir_lookup_result lookup = { NULL, };
1598
1599 mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir,
1600 dentry, symname, dentry->d_name.len, dentry->d_name.name);
1601
1602 sb = dir->i_sb;
1603 osb = OCFS2_SB(sb);
1604
1605 l = strlen(symname) + 1;
1606
1607 credits = ocfs2_calc_symlink_credits(sb);
1608
1609 /* lock the parent directory */
1610 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1611 if (status < 0) {
1612 if (status != -ENOENT)
1613 mlog_errno(status);
1614 return status;
1615 }
1616
1617 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1618 if (!ocfs2_read_links_count(dirfe)) {
1619 /* can't make a file in a deleted directory. */
1620 status = -ENOENT;
1621 goto bail;
1622 }
1623
1624 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1625 dentry->d_name.len);
1626 if (status)
1627 goto bail;
1628
1629 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1630 dentry->d_name.name,
1631 dentry->d_name.len, &lookup);
1632 if (status < 0) {
1633 mlog_errno(status);
1634 goto bail;
1635 }
1636
1637 status = ocfs2_reserve_new_inode(osb, &inode_ac);
1638 if (status < 0) {
1639 if (status != -ENOSPC)
1640 mlog_errno(status);
1641 goto bail;
1642 }
1643
1644 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1645 if (!inode) {
1646 status = -ENOMEM;
1647 mlog_errno(status);
1648 goto bail;
1649 }
1650
1651 /* get security xattr */
1652 status = ocfs2_init_security_get(inode, dir, &si);
1653 if (status) {
1654 if (status == -EOPNOTSUPP)
1655 si.enable = 0;
1656 else {
1657 mlog_errno(status);
1658 goto bail;
1659 }
1660 }
1661
1662 /* calculate meta data/clusters for setting security xattr */
1663 if (si.enable) {
1664 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1665 &xattr_credits, &xattr_ac);
1666 if (status < 0) {
1667 mlog_errno(status);
1668 goto bail;
1669 }
1670 }
1671
1672 /* don't reserve bitmap space for fast symlinks. */
1673 if (l > ocfs2_fast_symlink_chars(sb))
1674 want_clusters += 1;
1675
1676 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1677 if (status < 0) {
1678 if (status != -ENOSPC)
1679 mlog_errno(status);
1680 goto bail;
1681 }
1682
1683 handle = ocfs2_start_trans(osb, credits + xattr_credits);
1684 if (IS_ERR(handle)) {
1685 status = PTR_ERR(handle);
1686 handle = NULL;
1687 mlog_errno(status);
1688 goto bail;
1689 }
1690
1691 /* We don't use standard VFS wrapper because we don't want vfs_dq_init
1692 * to be called. */
1693 if (sb_any_quota_active(osb->sb) &&
1694 osb->sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA) {
1695 status = -EDQUOT;
1696 goto bail;
1697 }
1698 did_quota_inode = 1;
1699
1700 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry,
1701 inode->i_mode, dentry->d_name.len,
1702 dentry->d_name.name);
1703
1704 status = ocfs2_mknod_locked(osb, dir, inode,
1705 0, &new_fe_bh, parent_fe_bh, handle,
1706 inode_ac);
1707 if (status < 0) {
1708 mlog_errno(status);
1709 goto bail;
1710 }
1711
1712 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1713 inode->i_rdev = 0;
1714 newsize = l - 1;
1715 if (l > ocfs2_fast_symlink_chars(sb)) {
1716 u32 offset = 0;
1717
1718 inode->i_op = &ocfs2_symlink_inode_operations;
1719 if (vfs_dq_alloc_space_nodirty(inode,
1720 ocfs2_clusters_to_bytes(osb->sb, 1))) {
1721 status = -EDQUOT;
1722 goto bail;
1723 }
1724 did_quota = 1;
1725 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1726 new_fe_bh,
1727 handle, data_ac, NULL,
1728 NULL);
1729 if (status < 0) {
1730 if (status != -ENOSPC && status != -EINTR) {
1731 mlog(ML_ERROR,
1732 "Failed to extend file to %llu\n",
1733 (unsigned long long)newsize);
1734 mlog_errno(status);
1735 status = -ENOSPC;
1736 }
1737 goto bail;
1738 }
1739 i_size_write(inode, newsize);
1740 inode->i_blocks = ocfs2_inode_sector_count(inode);
1741 } else {
1742 inode->i_op = &ocfs2_fast_symlink_inode_operations;
1743 memcpy((char *) fe->id2.i_symlink, symname, l);
1744 i_size_write(inode, newsize);
1745 inode->i_blocks = 0;
1746 }
1747
1748 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1749 if (status < 0) {
1750 mlog_errno(status);
1751 goto bail;
1752 }
1753
1754 if (!ocfs2_inode_is_fast_symlink(inode)) {
1755 status = ocfs2_create_symlink_data(osb, handle, inode,
1756 symname);
1757 if (status < 0) {
1758 mlog_errno(status);
1759 goto bail;
1760 }
1761 }
1762
1763 if (si.enable) {
1764 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1765 xattr_ac, data_ac);
1766 if (status < 0) {
1767 mlog_errno(status);
1768 goto bail;
1769 }
1770 }
1771
1772 status = ocfs2_add_entry(handle, dentry, inode,
1773 le64_to_cpu(fe->i_blkno), parent_fe_bh,
1774 &lookup);
1775 if (status < 0) {
1776 mlog_errno(status);
1777 goto bail;
1778 }
1779
1780 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1781 if (status) {
1782 mlog_errno(status);
1783 goto bail;
1784 }
1785
1786 insert_inode_hash(inode);
1787 dentry->d_op = &ocfs2_dentry_ops;
1788 d_instantiate(dentry, inode);
1789 bail:
1790 if (status < 0 && did_quota)
1791 vfs_dq_free_space_nodirty(inode,
1792 ocfs2_clusters_to_bytes(osb->sb, 1));
1793 if (status < 0 && did_quota_inode)
1794 vfs_dq_free_inode(inode);
1795 if (handle)
1796 ocfs2_commit_trans(osb, handle);
1797
1798 ocfs2_inode_unlock(dir, 1);
1799
1800 brelse(new_fe_bh);
1801 brelse(parent_fe_bh);
1802 kfree(si.name);
1803 kfree(si.value);
1804 ocfs2_free_dir_lookup_result(&lookup);
1805 if (inode_ac)
1806 ocfs2_free_alloc_context(inode_ac);
1807 if (data_ac)
1808 ocfs2_free_alloc_context(data_ac);
1809 if (xattr_ac)
1810 ocfs2_free_alloc_context(xattr_ac);
1811 if ((status < 0) && inode) {
1812 clear_nlink(inode);
1813 iput(inode);
1814 }
1815
1816 mlog_exit(status);
1817
1818 return status;
1819 }
1820
1821 static int ocfs2_blkno_stringify(u64 blkno, char *name)
1822 {
1823 int status, namelen;
1824
1825 mlog_entry_void();
1826
1827 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
1828 (long long)blkno);
1829 if (namelen <= 0) {
1830 if (namelen)
1831 status = namelen;
1832 else
1833 status = -EINVAL;
1834 mlog_errno(status);
1835 goto bail;
1836 }
1837 if (namelen != OCFS2_ORPHAN_NAMELEN) {
1838 status = -EINVAL;
1839 mlog_errno(status);
1840 goto bail;
1841 }
1842
1843 mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name,
1844 namelen);
1845
1846 status = 0;
1847 bail:
1848 mlog_exit(status);
1849 return status;
1850 }
1851
1852 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
1853 struct inode **ret_orphan_dir,
1854 u64 blkno,
1855 char *name,
1856 struct ocfs2_dir_lookup_result *lookup)
1857 {
1858 struct inode *orphan_dir_inode;
1859 struct buffer_head *orphan_dir_bh = NULL;
1860 int status = 0;
1861
1862 status = ocfs2_blkno_stringify(blkno, name);
1863 if (status < 0) {
1864 mlog_errno(status);
1865 return status;
1866 }
1867
1868 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
1869 ORPHAN_DIR_SYSTEM_INODE,
1870 osb->slot_num);
1871 if (!orphan_dir_inode) {
1872 status = -ENOENT;
1873 mlog_errno(status);
1874 return status;
1875 }
1876
1877 mutex_lock(&orphan_dir_inode->i_mutex);
1878
1879 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
1880 if (status < 0) {
1881 mlog_errno(status);
1882 goto leave;
1883 }
1884
1885 status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
1886 orphan_dir_bh, name,
1887 OCFS2_ORPHAN_NAMELEN, lookup);
1888 if (status < 0) {
1889 ocfs2_inode_unlock(orphan_dir_inode, 1);
1890
1891 mlog_errno(status);
1892 goto leave;
1893 }
1894
1895 *ret_orphan_dir = orphan_dir_inode;
1896
1897 leave:
1898 if (status) {
1899 mutex_unlock(&orphan_dir_inode->i_mutex);
1900 iput(orphan_dir_inode);
1901 }
1902
1903 brelse(orphan_dir_bh);
1904
1905 mlog_exit(status);
1906 return status;
1907 }
1908
1909 static int ocfs2_orphan_add(struct ocfs2_super *osb,
1910 handle_t *handle,
1911 struct inode *inode,
1912 struct ocfs2_dinode *fe,
1913 char *name,
1914 struct ocfs2_dir_lookup_result *lookup,
1915 struct inode *orphan_dir_inode)
1916 {
1917 struct buffer_head *orphan_dir_bh = NULL;
1918 int status = 0;
1919 struct ocfs2_dinode *orphan_fe;
1920
1921 mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);
1922
1923 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
1924 if (status < 0) {
1925 mlog_errno(status);
1926 goto leave;
1927 }
1928
1929 status = ocfs2_journal_access_di(handle,
1930 INODE_CACHE(orphan_dir_inode),
1931 orphan_dir_bh,
1932 OCFS2_JOURNAL_ACCESS_WRITE);
1933 if (status < 0) {
1934 mlog_errno(status);
1935 goto leave;
1936 }
1937
1938 /* we're a cluster, and nlink can change on disk from
1939 * underneath us... */
1940 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
1941 if (S_ISDIR(inode->i_mode))
1942 ocfs2_add_links_count(orphan_fe, 1);
1943 orphan_dir_inode->i_nlink = ocfs2_read_links_count(orphan_fe);
1944
1945 status = ocfs2_journal_dirty(handle, orphan_dir_bh);
1946 if (status < 0) {
1947 mlog_errno(status);
1948 goto leave;
1949 }
1950
1951 status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
1952 OCFS2_ORPHAN_NAMELEN, inode,
1953 OCFS2_I(inode)->ip_blkno,
1954 orphan_dir_bh, lookup);
1955 if (status < 0) {
1956 mlog_errno(status);
1957 goto leave;
1958 }
1959
1960 le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL);
1961
1962 /* Record which orphan dir our inode now resides
1963 * in. delete_inode will use this to determine which orphan
1964 * dir to lock. */
1965 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
1966
1967 mlog(0, "Inode %llu orphaned in slot %d\n",
1968 (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num);
1969
1970 leave:
1971 brelse(orphan_dir_bh);
1972
1973 mlog_exit(status);
1974 return status;
1975 }
1976
1977 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
1978 int ocfs2_orphan_del(struct ocfs2_super *osb,
1979 handle_t *handle,
1980 struct inode *orphan_dir_inode,
1981 struct inode *inode,
1982 struct buffer_head *orphan_dir_bh)
1983 {
1984 char name[OCFS2_ORPHAN_NAMELEN + 1];
1985 struct ocfs2_dinode *orphan_fe;
1986 int status = 0;
1987 struct ocfs2_dir_lookup_result lookup = { NULL, };
1988
1989 mlog_entry_void();
1990
1991 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
1992 if (status < 0) {
1993 mlog_errno(status);
1994 goto leave;
1995 }
1996
1997 mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n",
1998 name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
1999 OCFS2_ORPHAN_NAMELEN);
2000
2001 /* find it's spot in the orphan directory */
2002 status = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, orphan_dir_inode,
2003 &lookup);
2004 if (status) {
2005 mlog_errno(status);
2006 goto leave;
2007 }
2008
2009 /* remove it from the orphan directory */
2010 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2011 if (status < 0) {
2012 mlog_errno(status);
2013 goto leave;
2014 }
2015
2016 status = ocfs2_journal_access_di(handle,
2017 INODE_CACHE(orphan_dir_inode),
2018 orphan_dir_bh,
2019 OCFS2_JOURNAL_ACCESS_WRITE);
2020 if (status < 0) {
2021 mlog_errno(status);
2022 goto leave;
2023 }
2024
2025 /* do the i_nlink dance! :) */
2026 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2027 if (S_ISDIR(inode->i_mode))
2028 ocfs2_add_links_count(orphan_fe, -1);
2029 orphan_dir_inode->i_nlink = ocfs2_read_links_count(orphan_fe);
2030
2031 status = ocfs2_journal_dirty(handle, orphan_dir_bh);
2032 if (status < 0) {
2033 mlog_errno(status);
2034 goto leave;
2035 }
2036
2037 leave:
2038 ocfs2_free_dir_lookup_result(&lookup);
2039
2040 mlog_exit(status);
2041 return status;
2042 }
2043
2044 int ocfs2_create_inode_in_orphan(struct inode *dir,
2045 int mode,
2046 struct inode **new_inode)
2047 {
2048 int status, did_quota_inode = 0;
2049 struct inode *inode = NULL;
2050 struct inode *orphan_dir = NULL;
2051 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2052 struct ocfs2_dinode *di = NULL;
2053 handle_t *handle = NULL;
2054 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2055 struct buffer_head *parent_di_bh = NULL;
2056 struct buffer_head *new_di_bh = NULL;
2057 struct ocfs2_alloc_context *inode_ac = NULL;
2058 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2059
2060 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2061 if (status < 0) {
2062 if (status != -ENOENT)
2063 mlog_errno(status);
2064 return status;
2065 }
2066
2067 /*
2068 * We give the orphan dir the root blkno to fake an orphan name,
2069 * and allocate enough space for our insertion.
2070 */
2071 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
2072 osb->root_blkno,
2073 orphan_name, &orphan_insert);
2074 if (status < 0) {
2075 mlog_errno(status);
2076 goto leave;
2077 }
2078
2079 /* reserve an inode spot */
2080 status = ocfs2_reserve_new_inode(osb, &inode_ac);
2081 if (status < 0) {
2082 if (status != -ENOSPC)
2083 mlog_errno(status);
2084 goto leave;
2085 }
2086
2087 inode = ocfs2_get_init_inode(dir, mode);
2088 if (!inode) {
2089 status = -ENOMEM;
2090 mlog_errno(status);
2091 goto leave;
2092 }
2093
2094 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2095 if (IS_ERR(handle)) {
2096 status = PTR_ERR(handle);
2097 handle = NULL;
2098 mlog_errno(status);
2099 goto leave;
2100 }
2101
2102 /* We don't use standard VFS wrapper because we don't want vfs_dq_init
2103 * to be called. */
2104 if (sb_any_quota_active(osb->sb) &&
2105 osb->sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA) {
2106 status = -EDQUOT;
2107 goto leave;
2108 }
2109 did_quota_inode = 1;
2110
2111 /* do the real work now. */
2112 status = ocfs2_mknod_locked(osb, dir, inode,
2113 0, &new_di_bh, parent_di_bh, handle,
2114 inode_ac);
2115 if (status < 0) {
2116 mlog_errno(status);
2117 goto leave;
2118 }
2119
2120 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, orphan_name);
2121 if (status < 0) {
2122 mlog_errno(status);
2123 goto leave;
2124 }
2125
2126 di = (struct ocfs2_dinode *)new_di_bh->b_data;
2127 status = ocfs2_orphan_add(osb, handle, inode, di, orphan_name,
2128 &orphan_insert, orphan_dir);
2129 if (status < 0) {
2130 mlog_errno(status);
2131 goto leave;
2132 }
2133
2134 /* get open lock so that only nodes can't remove it from orphan dir. */
2135 status = ocfs2_open_lock(inode);
2136 if (status < 0)
2137 mlog_errno(status);
2138
2139 leave:
2140 if (status < 0 && did_quota_inode)
2141 vfs_dq_free_inode(inode);
2142 if (handle)
2143 ocfs2_commit_trans(osb, handle);
2144
2145 if (orphan_dir) {
2146 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2147 ocfs2_inode_unlock(orphan_dir, 1);
2148 mutex_unlock(&orphan_dir->i_mutex);
2149 iput(orphan_dir);
2150 }
2151
2152 if (status == -ENOSPC)
2153 mlog(0, "Disk is full\n");
2154
2155 if ((status < 0) && inode) {
2156 clear_nlink(inode);
2157 iput(inode);
2158 }
2159
2160 if (inode_ac)
2161 ocfs2_free_alloc_context(inode_ac);
2162
2163 brelse(new_di_bh);
2164
2165 if (!status)
2166 *new_inode = inode;
2167
2168 ocfs2_free_dir_lookup_result(&orphan_insert);
2169
2170 ocfs2_inode_unlock(dir, 1);
2171 brelse(parent_di_bh);
2172 return status;
2173 }
2174
2175 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2176 struct inode *inode,
2177 struct dentry *dentry)
2178 {
2179 int status = 0;
2180 struct buffer_head *parent_di_bh = NULL;
2181 handle_t *handle = NULL;
2182 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2183 struct ocfs2_dinode *dir_di, *di;
2184 struct inode *orphan_dir_inode = NULL;
2185 struct buffer_head *orphan_dir_bh = NULL;
2186 struct buffer_head *di_bh = NULL;
2187 struct ocfs2_dir_lookup_result lookup = { NULL, };
2188
2189 mlog_entry("(0x%p, 0x%p, %.*s')\n", dir, dentry,
2190 dentry->d_name.len, dentry->d_name.name);
2191
2192 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2193 if (status < 0) {
2194 if (status != -ENOENT)
2195 mlog_errno(status);
2196 return status;
2197 }
2198
2199 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2200 if (!dir_di->i_links_count) {
2201 /* can't make a file in a deleted directory. */
2202 status = -ENOENT;
2203 goto leave;
2204 }
2205
2206 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2207 dentry->d_name.len);
2208 if (status)
2209 goto leave;
2210
2211 /* get a spot inside the dir. */
2212 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2213 dentry->d_name.name,
2214 dentry->d_name.len, &lookup);
2215 if (status < 0) {
2216 mlog_errno(status);
2217 goto leave;
2218 }
2219
2220 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2221 ORPHAN_DIR_SYSTEM_INODE,
2222 osb->slot_num);
2223 if (!orphan_dir_inode) {
2224 status = -EEXIST;
2225 mlog_errno(status);
2226 goto leave;
2227 }
2228
2229 mutex_lock(&orphan_dir_inode->i_mutex);
2230
2231 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2232 if (status < 0) {
2233 mlog_errno(status);
2234 mutex_unlock(&orphan_dir_inode->i_mutex);
2235 iput(orphan_dir_inode);
2236 goto leave;
2237 }
2238
2239 status = ocfs2_read_inode_block(inode, &di_bh);
2240 if (status < 0) {
2241 mlog_errno(status);
2242 goto orphan_unlock;
2243 }
2244
2245 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2246 if (IS_ERR(handle)) {
2247 status = PTR_ERR(handle);
2248 handle = NULL;
2249 mlog_errno(status);
2250 goto orphan_unlock;
2251 }
2252
2253 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2254 di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2255 if (status < 0) {
2256 mlog_errno(status);
2257 goto out_commit;
2258 }
2259
2260 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2261 orphan_dir_bh);
2262 if (status < 0) {
2263 mlog_errno(status);
2264 goto out_commit;
2265 }
2266
2267 di = (struct ocfs2_dinode *)di_bh->b_data;
2268 le32_add_cpu(&di->i_flags, -OCFS2_ORPHANED_FL);
2269 di->i_orphaned_slot = 0;
2270 ocfs2_journal_dirty(handle, di_bh);
2271
2272 status = ocfs2_add_entry(handle, dentry, inode,
2273 OCFS2_I(inode)->ip_blkno, parent_di_bh,
2274 &lookup);
2275 if (status < 0) {
2276 mlog_errno(status);
2277 goto out_commit;
2278 }
2279
2280 status = ocfs2_dentry_attach_lock(dentry, inode,
2281 OCFS2_I(dir)->ip_blkno);
2282 if (status) {
2283 mlog_errno(status);
2284 goto out_commit;
2285 }
2286
2287 insert_inode_hash(inode);
2288 dentry->d_op = &ocfs2_dentry_ops;
2289 d_instantiate(dentry, inode);
2290 status = 0;
2291 out_commit:
2292 ocfs2_commit_trans(osb, handle);
2293 orphan_unlock:
2294 ocfs2_inode_unlock(orphan_dir_inode, 1);
2295 mutex_unlock(&orphan_dir_inode->i_mutex);
2296 iput(orphan_dir_inode);
2297 leave:
2298
2299 ocfs2_inode_unlock(dir, 1);
2300
2301 brelse(di_bh);
2302 brelse(parent_di_bh);
2303 brelse(orphan_dir_bh);
2304
2305 ocfs2_free_dir_lookup_result(&lookup);
2306
2307 mlog_exit(status);
2308
2309 return status;
2310 }
2311
2312 const struct inode_operations ocfs2_dir_iops = {
2313 .create = ocfs2_create,
2314 .lookup = ocfs2_lookup,
2315 .link = ocfs2_link,
2316 .unlink = ocfs2_unlink,
2317 .rmdir = ocfs2_unlink,
2318 .symlink = ocfs2_symlink,
2319 .mkdir = ocfs2_mkdir,
2320 .mknod = ocfs2_mknod,
2321 .rename = ocfs2_rename,
2322 .setattr = ocfs2_setattr,
2323 .getattr = ocfs2_getattr,
2324 .permission = ocfs2_permission,
2325 .setxattr = generic_setxattr,
2326 .getxattr = generic_getxattr,
2327 .listxattr = ocfs2_listxattr,
2328 .removexattr = generic_removexattr,
2329 };
Linux for Ginger Game Console