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quota: Refactor dquot_transfer code so that OCFS2 can pass in its references
[mirror_ubuntu-artful-kernel.git] / fs / ocfs2 / namei.c
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 sigset_t oldset;
243 int did_block_signals = 0;
244
245 mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode,
246 (unsigned long)dev, dentry->d_name.len,
247 dentry->d_name.name);
248
249 dquot_initialize(dir);
250
251 /* get our super block */
252 osb = OCFS2_SB(dir->i_sb);
253
254 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
255 if (status < 0) {
256 if (status != -ENOENT)
257 mlog_errno(status);
258 return status;
259 }
260
261 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
262 status = -EMLINK;
263 goto leave;
264 }
265
266 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
267 if (!ocfs2_read_links_count(dirfe)) {
268 /* can't make a file in a deleted directory. */
269 status = -ENOENT;
270 goto leave;
271 }
272
273 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
274 dentry->d_name.len);
275 if (status)
276 goto leave;
277
278 /* get a spot inside the dir. */
279 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
280 dentry->d_name.name,
281 dentry->d_name.len, &lookup);
282 if (status < 0) {
283 mlog_errno(status);
284 goto leave;
285 }
286
287 /* reserve an inode spot */
288 status = ocfs2_reserve_new_inode(osb, &inode_ac);
289 if (status < 0) {
290 if (status != -ENOSPC)
291 mlog_errno(status);
292 goto leave;
293 }
294
295 inode = ocfs2_get_init_inode(dir, mode);
296 if (!inode) {
297 status = -ENOMEM;
298 mlog_errno(status);
299 goto leave;
300 }
301
302 /* get security xattr */
303 status = ocfs2_init_security_get(inode, dir, &si);
304 if (status) {
305 if (status == -EOPNOTSUPP)
306 si.enable = 0;
307 else {
308 mlog_errno(status);
309 goto leave;
310 }
311 }
312
313 /* calculate meta data/clusters for setting security and acl xattr */
314 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
315 &si, &want_clusters,
316 &xattr_credits, &want_meta);
317 if (status < 0) {
318 mlog_errno(status);
319 goto leave;
320 }
321
322 /* Reserve a cluster if creating an extent based directory. */
323 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
324 want_clusters += 1;
325
326 /* Dir indexing requires extra space as well */
327 if (ocfs2_supports_indexed_dirs(osb))
328 want_meta++;
329 }
330
331 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
332 if (status < 0) {
333 if (status != -ENOSPC)
334 mlog_errno(status);
335 goto leave;
336 }
337
338 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
339 if (status < 0) {
340 if (status != -ENOSPC)
341 mlog_errno(status);
342 goto leave;
343 }
344
345 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
346 S_ISDIR(mode),
347 xattr_credits));
348 if (IS_ERR(handle)) {
349 status = PTR_ERR(handle);
350 handle = NULL;
351 mlog_errno(status);
352 goto leave;
353 }
354
355 /* Starting to change things, restart is no longer possible. */
356 ocfs2_block_signals(&oldset);
357 did_block_signals = 1;
358
359 status = dquot_alloc_inode(inode);
360 if (status)
361 goto leave;
362 did_quota_inode = 1;
363
364 mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry,
365 inode->i_mode, (unsigned long)dev, dentry->d_name.len,
366 dentry->d_name.name);
367
368 /* do the real work now. */
369 status = ocfs2_mknod_locked(osb, dir, inode, dev,
370 &new_fe_bh, parent_fe_bh, handle,
371 inode_ac);
372 if (status < 0) {
373 mlog_errno(status);
374 goto leave;
375 }
376
377 if (S_ISDIR(mode)) {
378 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
379 new_fe_bh, data_ac, meta_ac);
380 if (status < 0) {
381 mlog_errno(status);
382 goto leave;
383 }
384
385 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
386 parent_fe_bh,
387 OCFS2_JOURNAL_ACCESS_WRITE);
388 if (status < 0) {
389 mlog_errno(status);
390 goto leave;
391 }
392 ocfs2_add_links_count(dirfe, 1);
393 ocfs2_journal_dirty(handle, parent_fe_bh);
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 /*
414 * Do this before adding the entry to the directory. We add
415 * also set d_op after success so that ->d_iput() will cleanup
416 * the dentry lock even if ocfs2_add_entry() fails below.
417 */
418 status = ocfs2_dentry_attach_lock(dentry, inode,
419 OCFS2_I(dir)->ip_blkno);
420 if (status) {
421 mlog_errno(status);
422 goto leave;
423 }
424 dentry->d_op = &ocfs2_dentry_ops;
425
426 status = ocfs2_add_entry(handle, dentry, inode,
427 OCFS2_I(inode)->ip_blkno, parent_fe_bh,
428 &lookup);
429 if (status < 0) {
430 mlog_errno(status);
431 goto leave;
432 }
433
434 insert_inode_hash(inode);
435 d_instantiate(dentry, inode);
436 status = 0;
437 leave:
438 if (status < 0 && did_quota_inode)
439 dquot_free_inode(inode);
440 if (handle)
441 ocfs2_commit_trans(osb, handle);
442
443 ocfs2_inode_unlock(dir, 1);
444 if (did_block_signals)
445 ocfs2_unblock_signals(&oldset);
446
447 if (status == -ENOSPC)
448 mlog(0, "Disk is full\n");
449
450 brelse(new_fe_bh);
451 brelse(parent_fe_bh);
452 kfree(si.name);
453 kfree(si.value);
454
455 ocfs2_free_dir_lookup_result(&lookup);
456
457 if (inode_ac)
458 ocfs2_free_alloc_context(inode_ac);
459
460 if (data_ac)
461 ocfs2_free_alloc_context(data_ac);
462
463 if (meta_ac)
464 ocfs2_free_alloc_context(meta_ac);
465
466 /*
467 * We should call iput after the i_mutex of the bitmap been
468 * unlocked in ocfs2_free_alloc_context, or the
469 * ocfs2_delete_inode will mutex_lock again.
470 */
471 if ((status < 0) && inode) {
472 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
473 clear_nlink(inode);
474 iput(inode);
475 }
476
477 mlog_exit(status);
478
479 return status;
480 }
481
482 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
483 struct inode *dir,
484 struct inode *inode,
485 dev_t dev,
486 struct buffer_head **new_fe_bh,
487 struct buffer_head *parent_fe_bh,
488 handle_t *handle,
489 struct ocfs2_alloc_context *inode_ac)
490 {
491 int status = 0;
492 struct ocfs2_dinode *fe = NULL;
493 struct ocfs2_extent_list *fel;
494 u64 suballoc_loc, fe_blkno = 0;
495 u16 suballoc_bit;
496 u16 feat;
497
498 *new_fe_bh = NULL;
499
500 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
501 inode_ac, &suballoc_loc,
502 &suballoc_bit, &fe_blkno);
503 if (status < 0) {
504 mlog_errno(status);
505 goto leave;
506 }
507
508 /* populate as many fields early on as possible - many of
509 * these are used by the support functions here and in
510 * callers. */
511 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
512 OCFS2_I(inode)->ip_blkno = fe_blkno;
513 spin_lock(&osb->osb_lock);
514 inode->i_generation = osb->s_next_generation++;
515 spin_unlock(&osb->osb_lock);
516
517 *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
518 if (!*new_fe_bh) {
519 status = -EIO;
520 mlog_errno(status);
521 goto leave;
522 }
523 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
524
525 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
526 *new_fe_bh,
527 OCFS2_JOURNAL_ACCESS_CREATE);
528 if (status < 0) {
529 mlog_errno(status);
530 goto leave;
531 }
532
533 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
534 memset(fe, 0, osb->sb->s_blocksize);
535
536 fe->i_generation = cpu_to_le32(inode->i_generation);
537 fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
538 fe->i_blkno = cpu_to_le64(fe_blkno);
539 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
540 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
541 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
542 fe->i_uid = cpu_to_le32(inode->i_uid);
543 fe->i_gid = cpu_to_le32(inode->i_gid);
544 fe->i_mode = cpu_to_le16(inode->i_mode);
545 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
546 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
547
548 ocfs2_set_links_count(fe, inode->i_nlink);
549
550 fe->i_last_eb_blk = 0;
551 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
552 le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL);
553 fe->i_atime = fe->i_ctime = fe->i_mtime =
554 cpu_to_le64(CURRENT_TIME.tv_sec);
555 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
556 cpu_to_le32(CURRENT_TIME.tv_nsec);
557 fe->i_dtime = 0;
558
559 /*
560 * If supported, directories start with inline data. If inline
561 * isn't supported, but indexing is, we start them as indexed.
562 */
563 feat = le16_to_cpu(fe->i_dyn_features);
564 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
565 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
566
567 fe->id2.i_data.id_count = cpu_to_le16(
568 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
569 } else {
570 fel = &fe->id2.i_list;
571 fel->l_tree_depth = 0;
572 fel->l_next_free_rec = 0;
573 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
574 }
575
576 ocfs2_journal_dirty(handle, *new_fe_bh);
577
578 ocfs2_populate_inode(inode, fe, 1);
579 ocfs2_ci_set_new(osb, INODE_CACHE(inode));
580 if (!ocfs2_mount_local(osb)) {
581 status = ocfs2_create_new_inode_locks(inode);
582 if (status < 0)
583 mlog_errno(status);
584 }
585
586 status = 0; /* error in ocfs2_create_new_inode_locks is not
587 * critical */
588
589 leave:
590 if (status < 0) {
591 if (*new_fe_bh) {
592 brelse(*new_fe_bh);
593 *new_fe_bh = NULL;
594 }
595 }
596
597 mlog_exit(status);
598 return status;
599 }
600
601 static int ocfs2_mkdir(struct inode *dir,
602 struct dentry *dentry,
603 int mode)
604 {
605 int ret;
606
607 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
608 dentry->d_name.len, dentry->d_name.name);
609 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
610 mlog_exit(ret);
611
612 return ret;
613 }
614
615 static int ocfs2_create(struct inode *dir,
616 struct dentry *dentry,
617 int mode,
618 struct nameidata *nd)
619 {
620 int ret;
621
622 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
623 dentry->d_name.len, dentry->d_name.name);
624 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
625 mlog_exit(ret);
626
627 return ret;
628 }
629
630 static int ocfs2_link(struct dentry *old_dentry,
631 struct inode *dir,
632 struct dentry *dentry)
633 {
634 handle_t *handle;
635 struct inode *inode = old_dentry->d_inode;
636 int err;
637 struct buffer_head *fe_bh = NULL;
638 struct buffer_head *parent_fe_bh = NULL;
639 struct ocfs2_dinode *fe = NULL;
640 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
641 struct ocfs2_dir_lookup_result lookup = { NULL, };
642 sigset_t oldset;
643
644 mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino,
645 old_dentry->d_name.len, old_dentry->d_name.name,
646 dentry->d_name.len, dentry->d_name.name);
647
648 if (S_ISDIR(inode->i_mode))
649 return -EPERM;
650
651 dquot_initialize(dir);
652
653 err = ocfs2_inode_lock_nested(dir, &parent_fe_bh, 1, OI_LS_PARENT);
654 if (err < 0) {
655 if (err != -ENOENT)
656 mlog_errno(err);
657 return err;
658 }
659
660 if (!dir->i_nlink) {
661 err = -ENOENT;
662 goto out;
663 }
664
665 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
666 dentry->d_name.len);
667 if (err)
668 goto out;
669
670 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
671 dentry->d_name.name,
672 dentry->d_name.len, &lookup);
673 if (err < 0) {
674 mlog_errno(err);
675 goto out;
676 }
677
678 err = ocfs2_inode_lock(inode, &fe_bh, 1);
679 if (err < 0) {
680 if (err != -ENOENT)
681 mlog_errno(err);
682 goto out;
683 }
684
685 fe = (struct ocfs2_dinode *) fe_bh->b_data;
686 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
687 err = -EMLINK;
688 goto out_unlock_inode;
689 }
690
691 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
692 if (IS_ERR(handle)) {
693 err = PTR_ERR(handle);
694 handle = NULL;
695 mlog_errno(err);
696 goto out_unlock_inode;
697 }
698
699 /* Starting to change things, restart is no longer possible. */
700 ocfs2_block_signals(&oldset);
701
702 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
703 OCFS2_JOURNAL_ACCESS_WRITE);
704 if (err < 0) {
705 mlog_errno(err);
706 goto out_commit;
707 }
708
709 inc_nlink(inode);
710 inode->i_ctime = CURRENT_TIME;
711 ocfs2_set_links_count(fe, inode->i_nlink);
712 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
713 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
714 ocfs2_journal_dirty(handle, fe_bh);
715
716 err = ocfs2_add_entry(handle, dentry, inode,
717 OCFS2_I(inode)->ip_blkno,
718 parent_fe_bh, &lookup);
719 if (err) {
720 ocfs2_add_links_count(fe, -1);
721 drop_nlink(inode);
722 mlog_errno(err);
723 goto out_commit;
724 }
725
726 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
727 if (err) {
728 mlog_errno(err);
729 goto out_commit;
730 }
731
732 atomic_inc(&inode->i_count);
733 dentry->d_op = &ocfs2_dentry_ops;
734 d_instantiate(dentry, inode);
735
736 out_commit:
737 ocfs2_commit_trans(osb, handle);
738 ocfs2_unblock_signals(&oldset);
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 ocfs2_journal_dirty(handle, fe_bh);
913
914 dir->i_ctime = dir->i_mtime = CURRENT_TIME;
915 if (S_ISDIR(inode->i_mode))
916 drop_nlink(dir);
917
918 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
919 if (status < 0) {
920 mlog_errno(status);
921 if (S_ISDIR(inode->i_mode))
922 inc_nlink(dir);
923 }
924
925 leave:
926 if (handle)
927 ocfs2_commit_trans(osb, handle);
928
929 if (child_locked)
930 ocfs2_inode_unlock(inode, 1);
931
932 ocfs2_inode_unlock(dir, 1);
933
934 if (orphan_dir) {
935 /* This was locked for us in ocfs2_prepare_orphan_dir() */
936 ocfs2_inode_unlock(orphan_dir, 1);
937 mutex_unlock(&orphan_dir->i_mutex);
938 iput(orphan_dir);
939 }
940
941 brelse(fe_bh);
942 brelse(parent_node_bh);
943
944 ocfs2_free_dir_lookup_result(&orphan_insert);
945 ocfs2_free_dir_lookup_result(&lookup);
946
947 mlog_exit(status);
948
949 return status;
950 }
951
952 /*
953 * The only place this should be used is rename!
954 * if they have the same id, then the 1st one is the only one locked.
955 */
956 static int ocfs2_double_lock(struct ocfs2_super *osb,
957 struct buffer_head **bh1,
958 struct inode *inode1,
959 struct buffer_head **bh2,
960 struct inode *inode2)
961 {
962 int status;
963 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
964 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
965 struct buffer_head **tmpbh;
966 struct inode *tmpinode;
967
968 mlog_entry("(inode1 = %llu, inode2 = %llu)\n",
969 (unsigned long long)oi1->ip_blkno,
970 (unsigned long long)oi2->ip_blkno);
971
972 if (*bh1)
973 *bh1 = NULL;
974 if (*bh2)
975 *bh2 = NULL;
976
977 /* we always want to lock the one with the lower lockid first. */
978 if (oi1->ip_blkno != oi2->ip_blkno) {
979 if (oi1->ip_blkno < oi2->ip_blkno) {
980 /* switch id1 and id2 around */
981 mlog(0, "switching them around...\n");
982 tmpbh = bh2;
983 bh2 = bh1;
984 bh1 = tmpbh;
985
986 tmpinode = inode2;
987 inode2 = inode1;
988 inode1 = tmpinode;
989 }
990 /* lock id2 */
991 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
992 OI_LS_RENAME1);
993 if (status < 0) {
994 if (status != -ENOENT)
995 mlog_errno(status);
996 goto bail;
997 }
998 }
999
1000 /* lock id1 */
1001 status = ocfs2_inode_lock_nested(inode1, bh1, 1, OI_LS_RENAME2);
1002 if (status < 0) {
1003 /*
1004 * An error return must mean that no cluster locks
1005 * were held on function exit.
1006 */
1007 if (oi1->ip_blkno != oi2->ip_blkno)
1008 ocfs2_inode_unlock(inode2, 1);
1009
1010 if (status != -ENOENT)
1011 mlog_errno(status);
1012 }
1013
1014 bail:
1015 mlog_exit(status);
1016 return status;
1017 }
1018
1019 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1020 {
1021 ocfs2_inode_unlock(inode1, 1);
1022
1023 if (inode1 != inode2)
1024 ocfs2_inode_unlock(inode2, 1);
1025 }
1026
1027 static int ocfs2_rename(struct inode *old_dir,
1028 struct dentry *old_dentry,
1029 struct inode *new_dir,
1030 struct dentry *new_dentry)
1031 {
1032 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1033 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1034 struct inode *old_inode = old_dentry->d_inode;
1035 struct inode *new_inode = new_dentry->d_inode;
1036 struct inode *orphan_dir = NULL;
1037 struct ocfs2_dinode *newfe = NULL;
1038 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1039 struct buffer_head *newfe_bh = NULL;
1040 struct buffer_head *old_inode_bh = NULL;
1041 struct ocfs2_super *osb = NULL;
1042 u64 newfe_blkno, old_de_ino;
1043 handle_t *handle = NULL;
1044 struct buffer_head *old_dir_bh = NULL;
1045 struct buffer_head *new_dir_bh = NULL;
1046 nlink_t old_dir_nlink = old_dir->i_nlink;
1047 struct ocfs2_dinode *old_di;
1048 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1049 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1050 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1051 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1052 struct ocfs2_dir_lookup_result target_insert = { NULL, };
1053
1054 /* At some point it might be nice to break this function up a
1055 * bit. */
1056
1057 mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n",
1058 old_dir, old_dentry, new_dir, new_dentry,
1059 old_dentry->d_name.len, old_dentry->d_name.name,
1060 new_dentry->d_name.len, new_dentry->d_name.name);
1061
1062 dquot_initialize(old_dir);
1063 dquot_initialize(new_dir);
1064
1065 osb = OCFS2_SB(old_dir->i_sb);
1066
1067 if (new_inode) {
1068 if (!igrab(new_inode))
1069 BUG();
1070 }
1071
1072 /* Assume a directory hierarchy thusly:
1073 * a/b/c
1074 * a/d
1075 * a,b,c, and d are all directories.
1076 *
1077 * from cwd of 'a' on both nodes:
1078 * node1: mv b/c d
1079 * node2: mv d b/c
1080 *
1081 * And that's why, just like the VFS, we need a file system
1082 * rename lock. */
1083 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1084 status = ocfs2_rename_lock(osb);
1085 if (status < 0) {
1086 mlog_errno(status);
1087 goto bail;
1088 }
1089 rename_lock = 1;
1090 }
1091
1092 /* if old and new are the same, this'll just do one lock. */
1093 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1094 &new_dir_bh, new_dir);
1095 if (status < 0) {
1096 mlog_errno(status);
1097 goto bail;
1098 }
1099 parents_locked = 1;
1100
1101 /* make sure both dirs have bhs
1102 * get an extra ref on old_dir_bh if old==new */
1103 if (!new_dir_bh) {
1104 if (old_dir_bh) {
1105 new_dir_bh = old_dir_bh;
1106 get_bh(new_dir_bh);
1107 } else {
1108 mlog(ML_ERROR, "no old_dir_bh!\n");
1109 status = -EIO;
1110 goto bail;
1111 }
1112 }
1113
1114 /*
1115 * Aside from allowing a meta data update, the locking here
1116 * also ensures that the downconvert thread on other nodes
1117 * won't have to concurrently downconvert the inode and the
1118 * dentry locks.
1119 */
1120 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1121 OI_LS_PARENT);
1122 if (status < 0) {
1123 if (status != -ENOENT)
1124 mlog_errno(status);
1125 goto bail;
1126 }
1127 old_child_locked = 1;
1128
1129 status = ocfs2_remote_dentry_delete(old_dentry);
1130 if (status < 0) {
1131 mlog_errno(status);
1132 goto bail;
1133 }
1134
1135 if (S_ISDIR(old_inode->i_mode)) {
1136 u64 old_inode_parent;
1137
1138 update_dot_dot = 1;
1139 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1140 old_inode,
1141 &old_inode_dot_dot_res);
1142 if (status) {
1143 status = -EIO;
1144 goto bail;
1145 }
1146
1147 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1148 status = -EIO;
1149 goto bail;
1150 }
1151
1152 if (!new_inode && new_dir != old_dir &&
1153 new_dir->i_nlink >= ocfs2_link_max(osb)) {
1154 status = -EMLINK;
1155 goto bail;
1156 }
1157 }
1158
1159 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1160 old_dentry->d_name.len,
1161 &old_de_ino);
1162 if (status) {
1163 status = -ENOENT;
1164 goto bail;
1165 }
1166
1167 /*
1168 * Check for inode number is _not_ due to possible IO errors.
1169 * We might rmdir the source, keep it as pwd of some process
1170 * and merrily kill the link to whatever was created under the
1171 * same name. Goodbye sticky bit ;-<
1172 */
1173 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1174 status = -ENOENT;
1175 goto bail;
1176 }
1177
1178 /* check if the target already exists (in which case we need
1179 * to delete it */
1180 status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1181 new_dentry->d_name.len,
1182 &newfe_blkno, new_dir,
1183 &target_lookup_res);
1184 /* The only error we allow here is -ENOENT because the new
1185 * file not existing is perfectly valid. */
1186 if ((status < 0) && (status != -ENOENT)) {
1187 /* If we cannot find the file specified we should just */
1188 /* return the error... */
1189 mlog_errno(status);
1190 goto bail;
1191 }
1192 if (status == 0)
1193 target_exists = 1;
1194
1195 if (!target_exists && new_inode) {
1196 /*
1197 * Target was unlinked by another node while we were
1198 * waiting to get to ocfs2_rename(). There isn't
1199 * anything we can do here to help the situation, so
1200 * bubble up the appropriate error.
1201 */
1202 status = -ENOENT;
1203 goto bail;
1204 }
1205
1206 /* In case we need to overwrite an existing file, we blow it
1207 * away first */
1208 if (target_exists) {
1209 /* VFS didn't think there existed an inode here, but
1210 * someone else in the cluster must have raced our
1211 * rename to create one. Today we error cleanly, in
1212 * the future we should consider calling iget to build
1213 * a new struct inode for this entry. */
1214 if (!new_inode) {
1215 status = -EACCES;
1216
1217 mlog(0, "We found an inode for name %.*s but VFS "
1218 "didn't give us one.\n", new_dentry->d_name.len,
1219 new_dentry->d_name.name);
1220 goto bail;
1221 }
1222
1223 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1224 status = -EACCES;
1225
1226 mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n",
1227 (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1228 (unsigned long long)newfe_blkno,
1229 OCFS2_I(new_inode)->ip_flags);
1230 goto bail;
1231 }
1232
1233 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1234 if (status < 0) {
1235 if (status != -ENOENT)
1236 mlog_errno(status);
1237 goto bail;
1238 }
1239 new_child_locked = 1;
1240
1241 status = ocfs2_remote_dentry_delete(new_dentry);
1242 if (status < 0) {
1243 mlog_errno(status);
1244 goto bail;
1245 }
1246
1247 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1248
1249 mlog(0, "aha rename over existing... new_blkno=%llu "
1250 "newfebh=%p bhblocknr=%llu\n",
1251 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1252 (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1253
1254 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1255 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1256 OCFS2_I(new_inode)->ip_blkno,
1257 orphan_name, &orphan_insert);
1258 if (status < 0) {
1259 mlog_errno(status);
1260 goto bail;
1261 }
1262 }
1263 } else {
1264 BUG_ON(new_dentry->d_parent->d_inode != new_dir);
1265
1266 status = ocfs2_check_dir_for_entry(new_dir,
1267 new_dentry->d_name.name,
1268 new_dentry->d_name.len);
1269 if (status)
1270 goto bail;
1271
1272 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1273 new_dentry->d_name.name,
1274 new_dentry->d_name.len,
1275 &target_insert);
1276 if (status < 0) {
1277 mlog_errno(status);
1278 goto bail;
1279 }
1280 }
1281
1282 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1283 if (IS_ERR(handle)) {
1284 status = PTR_ERR(handle);
1285 handle = NULL;
1286 mlog_errno(status);
1287 goto bail;
1288 }
1289
1290 if (target_exists) {
1291 if (S_ISDIR(new_inode->i_mode)) {
1292 if (new_inode->i_nlink != 2 ||
1293 !ocfs2_empty_dir(new_inode)) {
1294 status = -ENOTEMPTY;
1295 goto bail;
1296 }
1297 }
1298 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1299 newfe_bh,
1300 OCFS2_JOURNAL_ACCESS_WRITE);
1301 if (status < 0) {
1302 mlog_errno(status);
1303 goto bail;
1304 }
1305
1306 if (S_ISDIR(new_inode->i_mode) ||
1307 (ocfs2_read_links_count(newfe) == 1)) {
1308 status = ocfs2_orphan_add(osb, handle, new_inode,
1309 newfe_bh, orphan_name,
1310 &orphan_insert, orphan_dir);
1311 if (status < 0) {
1312 mlog_errno(status);
1313 goto bail;
1314 }
1315 }
1316
1317 /* change the dirent to point to the correct inode */
1318 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1319 old_inode);
1320 if (status < 0) {
1321 mlog_errno(status);
1322 goto bail;
1323 }
1324 new_dir->i_version++;
1325
1326 if (S_ISDIR(new_inode->i_mode))
1327 ocfs2_set_links_count(newfe, 0);
1328 else
1329 ocfs2_add_links_count(newfe, -1);
1330 ocfs2_journal_dirty(handle, newfe_bh);
1331 } else {
1332 /* if the name was not found in new_dir, add it now */
1333 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1334 OCFS2_I(old_inode)->ip_blkno,
1335 new_dir_bh, &target_insert);
1336 }
1337
1338 old_inode->i_ctime = CURRENT_TIME;
1339 mark_inode_dirty(old_inode);
1340
1341 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1342 old_inode_bh,
1343 OCFS2_JOURNAL_ACCESS_WRITE);
1344 if (status >= 0) {
1345 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1346
1347 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1348 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1349 ocfs2_journal_dirty(handle, old_inode_bh);
1350 } else
1351 mlog_errno(status);
1352
1353 /*
1354 * Now that the name has been added to new_dir, remove the old name.
1355 *
1356 * We don't keep any directory entry context around until now
1357 * because the insert might have changed the type of directory
1358 * we're dealing with.
1359 */
1360 status = ocfs2_find_entry(old_dentry->d_name.name,
1361 old_dentry->d_name.len, old_dir,
1362 &old_entry_lookup);
1363 if (status)
1364 goto bail;
1365
1366 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1367 if (status < 0) {
1368 mlog_errno(status);
1369 goto bail;
1370 }
1371
1372 if (new_inode) {
1373 new_inode->i_nlink--;
1374 new_inode->i_ctime = CURRENT_TIME;
1375 }
1376 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1377
1378 if (update_dot_dot) {
1379 status = ocfs2_update_entry(old_inode, handle,
1380 &old_inode_dot_dot_res, new_dir);
1381 old_dir->i_nlink--;
1382 if (new_inode) {
1383 new_inode->i_nlink--;
1384 } else {
1385 inc_nlink(new_dir);
1386 mark_inode_dirty(new_dir);
1387 }
1388 }
1389 mark_inode_dirty(old_dir);
1390 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1391 if (new_inode) {
1392 mark_inode_dirty(new_inode);
1393 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1394 }
1395
1396 if (old_dir != new_dir) {
1397 /* Keep the same times on both directories.*/
1398 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1399
1400 /*
1401 * This will also pick up the i_nlink change from the
1402 * block above.
1403 */
1404 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1405 }
1406
1407 if (old_dir_nlink != old_dir->i_nlink) {
1408 if (!old_dir_bh) {
1409 mlog(ML_ERROR, "need to change nlink for old dir "
1410 "%llu from %d to %d but bh is NULL!\n",
1411 (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1412 (int)old_dir_nlink, old_dir->i_nlink);
1413 } else {
1414 struct ocfs2_dinode *fe;
1415 status = ocfs2_journal_access_di(handle,
1416 INODE_CACHE(old_dir),
1417 old_dir_bh,
1418 OCFS2_JOURNAL_ACCESS_WRITE);
1419 fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1420 ocfs2_set_links_count(fe, old_dir->i_nlink);
1421 ocfs2_journal_dirty(handle, old_dir_bh);
1422 }
1423 }
1424 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1425 status = 0;
1426 bail:
1427 if (rename_lock)
1428 ocfs2_rename_unlock(osb);
1429
1430 if (handle)
1431 ocfs2_commit_trans(osb, handle);
1432
1433 if (parents_locked)
1434 ocfs2_double_unlock(old_dir, new_dir);
1435
1436 if (old_child_locked)
1437 ocfs2_inode_unlock(old_inode, 1);
1438
1439 if (new_child_locked)
1440 ocfs2_inode_unlock(new_inode, 1);
1441
1442 if (orphan_dir) {
1443 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1444 ocfs2_inode_unlock(orphan_dir, 1);
1445 mutex_unlock(&orphan_dir->i_mutex);
1446 iput(orphan_dir);
1447 }
1448
1449 if (new_inode)
1450 sync_mapping_buffers(old_inode->i_mapping);
1451
1452 if (new_inode)
1453 iput(new_inode);
1454
1455 ocfs2_free_dir_lookup_result(&target_lookup_res);
1456 ocfs2_free_dir_lookup_result(&old_entry_lookup);
1457 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1458 ocfs2_free_dir_lookup_result(&orphan_insert);
1459 ocfs2_free_dir_lookup_result(&target_insert);
1460
1461 brelse(newfe_bh);
1462 brelse(old_inode_bh);
1463 brelse(old_dir_bh);
1464 brelse(new_dir_bh);
1465
1466 mlog_exit(status);
1467
1468 return status;
1469 }
1470
1471 /*
1472 * we expect i_size = strlen(symname). Copy symname into the file
1473 * data, including the null terminator.
1474 */
1475 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1476 handle_t *handle,
1477 struct inode *inode,
1478 const char *symname)
1479 {
1480 struct buffer_head **bhs = NULL;
1481 const char *c;
1482 struct super_block *sb = osb->sb;
1483 u64 p_blkno, p_blocks;
1484 int virtual, blocks, status, i, bytes_left;
1485
1486 bytes_left = i_size_read(inode) + 1;
1487 /* we can't trust i_blocks because we're actually going to
1488 * write i_size + 1 bytes. */
1489 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1490
1491 mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n",
1492 (unsigned long long)inode->i_blocks,
1493 i_size_read(inode), blocks);
1494
1495 /* Sanity check -- make sure we're going to fit. */
1496 if (bytes_left >
1497 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1498 status = -EIO;
1499 mlog_errno(status);
1500 goto bail;
1501 }
1502
1503 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1504 if (!bhs) {
1505 status = -ENOMEM;
1506 mlog_errno(status);
1507 goto bail;
1508 }
1509
1510 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1511 NULL);
1512 if (status < 0) {
1513 mlog_errno(status);
1514 goto bail;
1515 }
1516
1517 /* links can never be larger than one cluster so we know this
1518 * is all going to be contiguous, but do a sanity check
1519 * anyway. */
1520 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1521 status = -EIO;
1522 mlog_errno(status);
1523 goto bail;
1524 }
1525
1526 virtual = 0;
1527 while(bytes_left > 0) {
1528 c = &symname[virtual * sb->s_blocksize];
1529
1530 bhs[virtual] = sb_getblk(sb, p_blkno);
1531 if (!bhs[virtual]) {
1532 status = -ENOMEM;
1533 mlog_errno(status);
1534 goto bail;
1535 }
1536 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1537 bhs[virtual]);
1538
1539 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1540 bhs[virtual],
1541 OCFS2_JOURNAL_ACCESS_CREATE);
1542 if (status < 0) {
1543 mlog_errno(status);
1544 goto bail;
1545 }
1546
1547 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1548
1549 memcpy(bhs[virtual]->b_data, c,
1550 (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1551 bytes_left);
1552
1553 ocfs2_journal_dirty(handle, bhs[virtual]);
1554
1555 virtual++;
1556 p_blkno++;
1557 bytes_left -= sb->s_blocksize;
1558 }
1559
1560 status = 0;
1561 bail:
1562
1563 if (bhs) {
1564 for(i = 0; i < blocks; i++)
1565 brelse(bhs[i]);
1566 kfree(bhs);
1567 }
1568
1569 mlog_exit(status);
1570 return status;
1571 }
1572
1573 static int ocfs2_symlink(struct inode *dir,
1574 struct dentry *dentry,
1575 const char *symname)
1576 {
1577 int status, l, credits;
1578 u64 newsize;
1579 struct ocfs2_super *osb = NULL;
1580 struct inode *inode = NULL;
1581 struct super_block *sb;
1582 struct buffer_head *new_fe_bh = NULL;
1583 struct buffer_head *parent_fe_bh = NULL;
1584 struct ocfs2_dinode *fe = NULL;
1585 struct ocfs2_dinode *dirfe;
1586 handle_t *handle = NULL;
1587 struct ocfs2_alloc_context *inode_ac = NULL;
1588 struct ocfs2_alloc_context *data_ac = NULL;
1589 struct ocfs2_alloc_context *xattr_ac = NULL;
1590 int want_clusters = 0;
1591 int xattr_credits = 0;
1592 struct ocfs2_security_xattr_info si = {
1593 .enable = 1,
1594 };
1595 int did_quota = 0, did_quota_inode = 0;
1596 struct ocfs2_dir_lookup_result lookup = { NULL, };
1597 sigset_t oldset;
1598 int did_block_signals = 0;
1599
1600 mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir,
1601 dentry, symname, dentry->d_name.len, dentry->d_name.name);
1602
1603 dquot_initialize(dir);
1604
1605 sb = dir->i_sb;
1606 osb = OCFS2_SB(sb);
1607
1608 l = strlen(symname) + 1;
1609
1610 credits = ocfs2_calc_symlink_credits(sb);
1611
1612 /* lock the parent directory */
1613 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1614 if (status < 0) {
1615 if (status != -ENOENT)
1616 mlog_errno(status);
1617 return status;
1618 }
1619
1620 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1621 if (!ocfs2_read_links_count(dirfe)) {
1622 /* can't make a file in a deleted directory. */
1623 status = -ENOENT;
1624 goto bail;
1625 }
1626
1627 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1628 dentry->d_name.len);
1629 if (status)
1630 goto bail;
1631
1632 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1633 dentry->d_name.name,
1634 dentry->d_name.len, &lookup);
1635 if (status < 0) {
1636 mlog_errno(status);
1637 goto bail;
1638 }
1639
1640 status = ocfs2_reserve_new_inode(osb, &inode_ac);
1641 if (status < 0) {
1642 if (status != -ENOSPC)
1643 mlog_errno(status);
1644 goto bail;
1645 }
1646
1647 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1648 if (!inode) {
1649 status = -ENOMEM;
1650 mlog_errno(status);
1651 goto bail;
1652 }
1653
1654 /* get security xattr */
1655 status = ocfs2_init_security_get(inode, dir, &si);
1656 if (status) {
1657 if (status == -EOPNOTSUPP)
1658 si.enable = 0;
1659 else {
1660 mlog_errno(status);
1661 goto bail;
1662 }
1663 }
1664
1665 /* calculate meta data/clusters for setting security xattr */
1666 if (si.enable) {
1667 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1668 &xattr_credits, &xattr_ac);
1669 if (status < 0) {
1670 mlog_errno(status);
1671 goto bail;
1672 }
1673 }
1674
1675 /* don't reserve bitmap space for fast symlinks. */
1676 if (l > ocfs2_fast_symlink_chars(sb))
1677 want_clusters += 1;
1678
1679 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1680 if (status < 0) {
1681 if (status != -ENOSPC)
1682 mlog_errno(status);
1683 goto bail;
1684 }
1685
1686 handle = ocfs2_start_trans(osb, credits + xattr_credits);
1687 if (IS_ERR(handle)) {
1688 status = PTR_ERR(handle);
1689 handle = NULL;
1690 mlog_errno(status);
1691 goto bail;
1692 }
1693
1694 /* Starting to change things, restart is no longer possible. */
1695 ocfs2_block_signals(&oldset);
1696 did_block_signals = 1;
1697
1698 status = dquot_alloc_inode(inode);
1699 if (status)
1700 goto bail;
1701 did_quota_inode = 1;
1702
1703 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry,
1704 inode->i_mode, dentry->d_name.len,
1705 dentry->d_name.name);
1706
1707 status = ocfs2_mknod_locked(osb, dir, inode,
1708 0, &new_fe_bh, parent_fe_bh, handle,
1709 inode_ac);
1710 if (status < 0) {
1711 mlog_errno(status);
1712 goto bail;
1713 }
1714
1715 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1716 inode->i_rdev = 0;
1717 newsize = l - 1;
1718 if (l > ocfs2_fast_symlink_chars(sb)) {
1719 u32 offset = 0;
1720
1721 inode->i_op = &ocfs2_symlink_inode_operations;
1722 status = dquot_alloc_space_nodirty(inode,
1723 ocfs2_clusters_to_bytes(osb->sb, 1));
1724 if (status)
1725 goto bail;
1726 did_quota = 1;
1727 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1728 new_fe_bh,
1729 handle, data_ac, NULL,
1730 NULL);
1731 if (status < 0) {
1732 if (status != -ENOSPC && status != -EINTR) {
1733 mlog(ML_ERROR,
1734 "Failed to extend file to %llu\n",
1735 (unsigned long long)newsize);
1736 mlog_errno(status);
1737 status = -ENOSPC;
1738 }
1739 goto bail;
1740 }
1741 i_size_write(inode, newsize);
1742 inode->i_blocks = ocfs2_inode_sector_count(inode);
1743 } else {
1744 inode->i_op = &ocfs2_fast_symlink_inode_operations;
1745 memcpy((char *) fe->id2.i_symlink, symname, l);
1746 i_size_write(inode, newsize);
1747 inode->i_blocks = 0;
1748 }
1749
1750 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1751 if (status < 0) {
1752 mlog_errno(status);
1753 goto bail;
1754 }
1755
1756 if (!ocfs2_inode_is_fast_symlink(inode)) {
1757 status = ocfs2_create_symlink_data(osb, handle, inode,
1758 symname);
1759 if (status < 0) {
1760 mlog_errno(status);
1761 goto bail;
1762 }
1763 }
1764
1765 if (si.enable) {
1766 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1767 xattr_ac, data_ac);
1768 if (status < 0) {
1769 mlog_errno(status);
1770 goto bail;
1771 }
1772 }
1773
1774 /*
1775 * Do this before adding the entry to the directory. We add
1776 * also set d_op after success so that ->d_iput() will cleanup
1777 * the dentry lock even if ocfs2_add_entry() fails below.
1778 */
1779 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1780 if (status) {
1781 mlog_errno(status);
1782 goto bail;
1783 }
1784 dentry->d_op = &ocfs2_dentry_ops;
1785
1786 status = ocfs2_add_entry(handle, dentry, inode,
1787 le64_to_cpu(fe->i_blkno), parent_fe_bh,
1788 &lookup);
1789 if (status < 0) {
1790 mlog_errno(status);
1791 goto bail;
1792 }
1793
1794 insert_inode_hash(inode);
1795 d_instantiate(dentry, inode);
1796 bail:
1797 if (status < 0 && did_quota)
1798 dquot_free_space_nodirty(inode,
1799 ocfs2_clusters_to_bytes(osb->sb, 1));
1800 if (status < 0 && did_quota_inode)
1801 dquot_free_inode(inode);
1802 if (handle)
1803 ocfs2_commit_trans(osb, handle);
1804
1805 ocfs2_inode_unlock(dir, 1);
1806 if (did_block_signals)
1807 ocfs2_unblock_signals(&oldset);
1808
1809 brelse(new_fe_bh);
1810 brelse(parent_fe_bh);
1811 kfree(si.name);
1812 kfree(si.value);
1813 ocfs2_free_dir_lookup_result(&lookup);
1814 if (inode_ac)
1815 ocfs2_free_alloc_context(inode_ac);
1816 if (data_ac)
1817 ocfs2_free_alloc_context(data_ac);
1818 if (xattr_ac)
1819 ocfs2_free_alloc_context(xattr_ac);
1820 if ((status < 0) && inode) {
1821 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
1822 clear_nlink(inode);
1823 iput(inode);
1824 }
1825
1826 mlog_exit(status);
1827
1828 return status;
1829 }
1830
1831 static int ocfs2_blkno_stringify(u64 blkno, char *name)
1832 {
1833 int status, namelen;
1834
1835 mlog_entry_void();
1836
1837 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
1838 (long long)blkno);
1839 if (namelen <= 0) {
1840 if (namelen)
1841 status = namelen;
1842 else
1843 status = -EINVAL;
1844 mlog_errno(status);
1845 goto bail;
1846 }
1847 if (namelen != OCFS2_ORPHAN_NAMELEN) {
1848 status = -EINVAL;
1849 mlog_errno(status);
1850 goto bail;
1851 }
1852
1853 mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name,
1854 namelen);
1855
1856 status = 0;
1857 bail:
1858 mlog_exit(status);
1859 return status;
1860 }
1861
1862 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
1863 struct inode **ret_orphan_dir,
1864 u64 blkno,
1865 char *name,
1866 struct ocfs2_dir_lookup_result *lookup)
1867 {
1868 struct inode *orphan_dir_inode;
1869 struct buffer_head *orphan_dir_bh = NULL;
1870 int status = 0;
1871
1872 status = ocfs2_blkno_stringify(blkno, name);
1873 if (status < 0) {
1874 mlog_errno(status);
1875 return status;
1876 }
1877
1878 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
1879 ORPHAN_DIR_SYSTEM_INODE,
1880 osb->slot_num);
1881 if (!orphan_dir_inode) {
1882 status = -ENOENT;
1883 mlog_errno(status);
1884 return status;
1885 }
1886
1887 mutex_lock(&orphan_dir_inode->i_mutex);
1888
1889 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
1890 if (status < 0) {
1891 mlog_errno(status);
1892 goto leave;
1893 }
1894
1895 status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
1896 orphan_dir_bh, name,
1897 OCFS2_ORPHAN_NAMELEN, lookup);
1898 if (status < 0) {
1899 ocfs2_inode_unlock(orphan_dir_inode, 1);
1900
1901 mlog_errno(status);
1902 goto leave;
1903 }
1904
1905 *ret_orphan_dir = orphan_dir_inode;
1906
1907 leave:
1908 if (status) {
1909 mutex_unlock(&orphan_dir_inode->i_mutex);
1910 iput(orphan_dir_inode);
1911 }
1912
1913 brelse(orphan_dir_bh);
1914
1915 mlog_exit(status);
1916 return status;
1917 }
1918
1919 static int ocfs2_orphan_add(struct ocfs2_super *osb,
1920 handle_t *handle,
1921 struct inode *inode,
1922 struct buffer_head *fe_bh,
1923 char *name,
1924 struct ocfs2_dir_lookup_result *lookup,
1925 struct inode *orphan_dir_inode)
1926 {
1927 struct buffer_head *orphan_dir_bh = NULL;
1928 int status = 0;
1929 struct ocfs2_dinode *orphan_fe;
1930 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
1931
1932 mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);
1933
1934 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
1935 if (status < 0) {
1936 mlog_errno(status);
1937 goto leave;
1938 }
1939
1940 status = ocfs2_journal_access_di(handle,
1941 INODE_CACHE(orphan_dir_inode),
1942 orphan_dir_bh,
1943 OCFS2_JOURNAL_ACCESS_WRITE);
1944 if (status < 0) {
1945 mlog_errno(status);
1946 goto leave;
1947 }
1948
1949 /* we're a cluster, and nlink can change on disk from
1950 * underneath us... */
1951 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
1952 if (S_ISDIR(inode->i_mode))
1953 ocfs2_add_links_count(orphan_fe, 1);
1954 orphan_dir_inode->i_nlink = ocfs2_read_links_count(orphan_fe);
1955 ocfs2_journal_dirty(handle, orphan_dir_bh);
1956
1957 status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
1958 OCFS2_ORPHAN_NAMELEN, inode,
1959 OCFS2_I(inode)->ip_blkno,
1960 orphan_dir_bh, lookup);
1961 if (status < 0) {
1962 mlog_errno(status);
1963 goto leave;
1964 }
1965
1966 /*
1967 * We're going to journal the change of i_flags and i_orphaned_slot.
1968 * It's safe anyway, though some callers may duplicate the journaling.
1969 * Journaling within the func just make the logic look more
1970 * straightforward.
1971 */
1972 status = ocfs2_journal_access_di(handle,
1973 INODE_CACHE(inode),
1974 fe_bh,
1975 OCFS2_JOURNAL_ACCESS_WRITE);
1976 if (status < 0) {
1977 mlog_errno(status);
1978 goto leave;
1979 }
1980
1981 le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL);
1982 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
1983
1984 /* Record which orphan dir our inode now resides
1985 * in. delete_inode will use this to determine which orphan
1986 * dir to lock. */
1987 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
1988
1989 ocfs2_journal_dirty(handle, fe_bh);
1990
1991 mlog(0, "Inode %llu orphaned in slot %d\n",
1992 (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num);
1993
1994 leave:
1995 brelse(orphan_dir_bh);
1996
1997 mlog_exit(status);
1998 return status;
1999 }
2000
2001 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2002 int ocfs2_orphan_del(struct ocfs2_super *osb,
2003 handle_t *handle,
2004 struct inode *orphan_dir_inode,
2005 struct inode *inode,
2006 struct buffer_head *orphan_dir_bh)
2007 {
2008 char name[OCFS2_ORPHAN_NAMELEN + 1];
2009 struct ocfs2_dinode *orphan_fe;
2010 int status = 0;
2011 struct ocfs2_dir_lookup_result lookup = { NULL, };
2012
2013 mlog_entry_void();
2014
2015 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2016 if (status < 0) {
2017 mlog_errno(status);
2018 goto leave;
2019 }
2020
2021 mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n",
2022 name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2023 OCFS2_ORPHAN_NAMELEN);
2024
2025 /* find it's spot in the orphan directory */
2026 status = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, orphan_dir_inode,
2027 &lookup);
2028 if (status) {
2029 mlog_errno(status);
2030 goto leave;
2031 }
2032
2033 /* remove it from the orphan directory */
2034 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2035 if (status < 0) {
2036 mlog_errno(status);
2037 goto leave;
2038 }
2039
2040 status = ocfs2_journal_access_di(handle,
2041 INODE_CACHE(orphan_dir_inode),
2042 orphan_dir_bh,
2043 OCFS2_JOURNAL_ACCESS_WRITE);
2044 if (status < 0) {
2045 mlog_errno(status);
2046 goto leave;
2047 }
2048
2049 /* do the i_nlink dance! :) */
2050 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2051 if (S_ISDIR(inode->i_mode))
2052 ocfs2_add_links_count(orphan_fe, -1);
2053 orphan_dir_inode->i_nlink = ocfs2_read_links_count(orphan_fe);
2054 ocfs2_journal_dirty(handle, orphan_dir_bh);
2055
2056 leave:
2057 ocfs2_free_dir_lookup_result(&lookup);
2058
2059 mlog_exit(status);
2060 return status;
2061 }
2062
2063 int ocfs2_create_inode_in_orphan(struct inode *dir,
2064 int mode,
2065 struct inode **new_inode)
2066 {
2067 int status, did_quota_inode = 0;
2068 struct inode *inode = NULL;
2069 struct inode *orphan_dir = NULL;
2070 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2071 struct ocfs2_dinode *di = NULL;
2072 handle_t *handle = NULL;
2073 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2074 struct buffer_head *parent_di_bh = NULL;
2075 struct buffer_head *new_di_bh = NULL;
2076 struct ocfs2_alloc_context *inode_ac = NULL;
2077 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2078
2079 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2080 if (status < 0) {
2081 if (status != -ENOENT)
2082 mlog_errno(status);
2083 return status;
2084 }
2085
2086 /*
2087 * We give the orphan dir the root blkno to fake an orphan name,
2088 * and allocate enough space for our insertion.
2089 */
2090 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
2091 osb->root_blkno,
2092 orphan_name, &orphan_insert);
2093 if (status < 0) {
2094 mlog_errno(status);
2095 goto leave;
2096 }
2097
2098 /* reserve an inode spot */
2099 status = ocfs2_reserve_new_inode(osb, &inode_ac);
2100 if (status < 0) {
2101 if (status != -ENOSPC)
2102 mlog_errno(status);
2103 goto leave;
2104 }
2105
2106 inode = ocfs2_get_init_inode(dir, mode);
2107 if (!inode) {
2108 status = -ENOMEM;
2109 mlog_errno(status);
2110 goto leave;
2111 }
2112
2113 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2114 if (IS_ERR(handle)) {
2115 status = PTR_ERR(handle);
2116 handle = NULL;
2117 mlog_errno(status);
2118 goto leave;
2119 }
2120
2121 status = dquot_alloc_inode(inode);
2122 if (status)
2123 goto leave;
2124 did_quota_inode = 1;
2125
2126 inode->i_nlink = 0;
2127 /* do the real work now. */
2128 status = ocfs2_mknod_locked(osb, dir, inode,
2129 0, &new_di_bh, parent_di_bh, handle,
2130 inode_ac);
2131 if (status < 0) {
2132 mlog_errno(status);
2133 goto leave;
2134 }
2135
2136 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, orphan_name);
2137 if (status < 0) {
2138 mlog_errno(status);
2139 goto leave;
2140 }
2141
2142 di = (struct ocfs2_dinode *)new_di_bh->b_data;
2143 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2144 &orphan_insert, orphan_dir);
2145 if (status < 0) {
2146 mlog_errno(status);
2147 goto leave;
2148 }
2149
2150 /* get open lock so that only nodes can't remove it from orphan dir. */
2151 status = ocfs2_open_lock(inode);
2152 if (status < 0)
2153 mlog_errno(status);
2154
2155 insert_inode_hash(inode);
2156 leave:
2157 if (status < 0 && did_quota_inode)
2158 dquot_free_inode(inode);
2159 if (handle)
2160 ocfs2_commit_trans(osb, handle);
2161
2162 if (orphan_dir) {
2163 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2164 ocfs2_inode_unlock(orphan_dir, 1);
2165 mutex_unlock(&orphan_dir->i_mutex);
2166 iput(orphan_dir);
2167 }
2168
2169 if (status == -ENOSPC)
2170 mlog(0, "Disk is full\n");
2171
2172 if ((status < 0) && inode) {
2173 clear_nlink(inode);
2174 iput(inode);
2175 }
2176
2177 if (inode_ac)
2178 ocfs2_free_alloc_context(inode_ac);
2179
2180 brelse(new_di_bh);
2181
2182 if (!status)
2183 *new_inode = inode;
2184
2185 ocfs2_free_dir_lookup_result(&orphan_insert);
2186
2187 ocfs2_inode_unlock(dir, 1);
2188 brelse(parent_di_bh);
2189 return status;
2190 }
2191
2192 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2193 struct inode *inode,
2194 struct dentry *dentry)
2195 {
2196 int status = 0;
2197 struct buffer_head *parent_di_bh = NULL;
2198 handle_t *handle = NULL;
2199 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2200 struct ocfs2_dinode *dir_di, *di;
2201 struct inode *orphan_dir_inode = NULL;
2202 struct buffer_head *orphan_dir_bh = NULL;
2203 struct buffer_head *di_bh = NULL;
2204 struct ocfs2_dir_lookup_result lookup = { NULL, };
2205
2206 mlog_entry("(0x%p, 0x%p, %.*s')\n", dir, dentry,
2207 dentry->d_name.len, dentry->d_name.name);
2208
2209 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2210 if (status < 0) {
2211 if (status != -ENOENT)
2212 mlog_errno(status);
2213 return status;
2214 }
2215
2216 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2217 if (!dir_di->i_links_count) {
2218 /* can't make a file in a deleted directory. */
2219 status = -ENOENT;
2220 goto leave;
2221 }
2222
2223 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2224 dentry->d_name.len);
2225 if (status)
2226 goto leave;
2227
2228 /* get a spot inside the dir. */
2229 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2230 dentry->d_name.name,
2231 dentry->d_name.len, &lookup);
2232 if (status < 0) {
2233 mlog_errno(status);
2234 goto leave;
2235 }
2236
2237 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2238 ORPHAN_DIR_SYSTEM_INODE,
2239 osb->slot_num);
2240 if (!orphan_dir_inode) {
2241 status = -EEXIST;
2242 mlog_errno(status);
2243 goto leave;
2244 }
2245
2246 mutex_lock(&orphan_dir_inode->i_mutex);
2247
2248 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2249 if (status < 0) {
2250 mlog_errno(status);
2251 mutex_unlock(&orphan_dir_inode->i_mutex);
2252 iput(orphan_dir_inode);
2253 goto leave;
2254 }
2255
2256 status = ocfs2_read_inode_block(inode, &di_bh);
2257 if (status < 0) {
2258 mlog_errno(status);
2259 goto orphan_unlock;
2260 }
2261
2262 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2263 if (IS_ERR(handle)) {
2264 status = PTR_ERR(handle);
2265 handle = NULL;
2266 mlog_errno(status);
2267 goto orphan_unlock;
2268 }
2269
2270 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2271 di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2272 if (status < 0) {
2273 mlog_errno(status);
2274 goto out_commit;
2275 }
2276
2277 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2278 orphan_dir_bh);
2279 if (status < 0) {
2280 mlog_errno(status);
2281 goto out_commit;
2282 }
2283
2284 di = (struct ocfs2_dinode *)di_bh->b_data;
2285 le32_add_cpu(&di->i_flags, -OCFS2_ORPHANED_FL);
2286 di->i_orphaned_slot = 0;
2287 inode->i_nlink = 1;
2288 ocfs2_set_links_count(di, inode->i_nlink);
2289 ocfs2_journal_dirty(handle, di_bh);
2290
2291 status = ocfs2_add_entry(handle, dentry, inode,
2292 OCFS2_I(inode)->ip_blkno, parent_di_bh,
2293 &lookup);
2294 if (status < 0) {
2295 mlog_errno(status);
2296 goto out_commit;
2297 }
2298
2299 status = ocfs2_dentry_attach_lock(dentry, inode,
2300 OCFS2_I(dir)->ip_blkno);
2301 if (status) {
2302 mlog_errno(status);
2303 goto out_commit;
2304 }
2305
2306 dentry->d_op = &ocfs2_dentry_ops;
2307 d_instantiate(dentry, inode);
2308 status = 0;
2309 out_commit:
2310 ocfs2_commit_trans(osb, handle);
2311 orphan_unlock:
2312 ocfs2_inode_unlock(orphan_dir_inode, 1);
2313 mutex_unlock(&orphan_dir_inode->i_mutex);
2314 iput(orphan_dir_inode);
2315 leave:
2316
2317 ocfs2_inode_unlock(dir, 1);
2318
2319 brelse(di_bh);
2320 brelse(parent_di_bh);
2321 brelse(orphan_dir_bh);
2322
2323 ocfs2_free_dir_lookup_result(&lookup);
2324
2325 mlog_exit(status);
2326
2327 return status;
2328 }
2329
2330 const struct inode_operations ocfs2_dir_iops = {
2331 .create = ocfs2_create,
2332 .lookup = ocfs2_lookup,
2333 .link = ocfs2_link,
2334 .unlink = ocfs2_unlink,
2335 .rmdir = ocfs2_unlink,
2336 .symlink = ocfs2_symlink,
2337 .mkdir = ocfs2_mkdir,
2338 .mknod = ocfs2_mknod,
2339 .rename = ocfs2_rename,
2340 .setattr = ocfs2_setattr,
2341 .getattr = ocfs2_getattr,
2342 .permission = ocfs2_permission,
2343 .setxattr = generic_setxattr,
2344 .getxattr = generic_getxattr,
2345 .listxattr = ocfs2_listxattr,
2346 .removexattr = generic_removexattr,
2347 .fiemap = ocfs2_fiemap,
2348 };
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