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Merge tag 'iio-fixes-for-4.4b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23...
[deliverable/linux.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 #include <cluster/masklog.h>
46
47 #include "ocfs2.h"
48
49 #include "alloc.h"
50 #include "dcache.h"
51 #include "dir.h"
52 #include "dlmglue.h"
53 #include "extent_map.h"
54 #include "file.h"
55 #include "inode.h"
56 #include "journal.h"
57 #include "namei.h"
58 #include "suballoc.h"
59 #include "super.h"
60 #include "symlink.h"
61 #include "sysfile.h"
62 #include "uptodate.h"
63 #include "xattr.h"
64 #include "acl.h"
65 #include "ocfs2_trace.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 bool dio);
84
85 static int ocfs2_orphan_add(struct ocfs2_super *osb,
86 handle_t *handle,
87 struct inode *inode,
88 struct buffer_head *fe_bh,
89 char *name,
90 struct ocfs2_dir_lookup_result *lookup,
91 struct inode *orphan_dir_inode,
92 bool dio);
93
94 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
95 handle_t *handle,
96 struct inode *inode,
97 const char *symname);
98
99 static int ocfs2_double_lock(struct ocfs2_super *osb,
100 struct buffer_head **bh1,
101 struct inode *inode1,
102 struct buffer_head **bh2,
103 struct inode *inode2,
104 int rename);
105
106 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2);
107 /* An orphan dir name is an 8 byte value, printed as a hex string */
108 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
109
110 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
111 unsigned int flags)
112 {
113 int status;
114 u64 blkno;
115 struct inode *inode = NULL;
116 struct dentry *ret;
117 struct ocfs2_inode_info *oi;
118
119 trace_ocfs2_lookup(dir, dentry, dentry->d_name.len,
120 dentry->d_name.name,
121 (unsigned long long)OCFS2_I(dir)->ip_blkno, 0);
122
123 if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
124 ret = ERR_PTR(-ENAMETOOLONG);
125 goto bail;
126 }
127
128 status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
129 if (status < 0) {
130 if (status != -ENOENT)
131 mlog_errno(status);
132 ret = ERR_PTR(status);
133 goto bail;
134 }
135
136 status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
137 dentry->d_name.len, &blkno);
138 if (status < 0)
139 goto bail_add;
140
141 inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
142 if (IS_ERR(inode)) {
143 ret = ERR_PTR(-EACCES);
144 goto bail_unlock;
145 }
146
147 oi = OCFS2_I(inode);
148 /* Clear any orphaned state... If we were able to look up the
149 * inode from a directory, it certainly can't be orphaned. We
150 * might have the bad state from a node which intended to
151 * orphan this inode but crashed before it could commit the
152 * unlink. */
153 spin_lock(&oi->ip_lock);
154 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
155 spin_unlock(&oi->ip_lock);
156
157 bail_add:
158 ret = d_splice_alias(inode, dentry);
159
160 if (inode) {
161 /*
162 * If d_splice_alias() finds a DCACHE_DISCONNECTED
163 * dentry, it will d_move() it on top of ourse. The
164 * return value will indicate this however, so in
165 * those cases, we switch them around for the locking
166 * code.
167 *
168 * NOTE: This dentry already has ->d_op set from
169 * ocfs2_get_parent() and ocfs2_get_dentry()
170 */
171 if (!IS_ERR_OR_NULL(ret))
172 dentry = ret;
173
174 status = ocfs2_dentry_attach_lock(dentry, inode,
175 OCFS2_I(dir)->ip_blkno);
176 if (status) {
177 mlog_errno(status);
178 ret = ERR_PTR(status);
179 goto bail_unlock;
180 }
181 } else
182 ocfs2_dentry_attach_gen(dentry);
183
184 bail_unlock:
185 /* Don't drop the cluster lock until *after* the d_add --
186 * unlink on another node will message us to remove that
187 * dentry under this lock so otherwise we can race this with
188 * the downconvert thread and have a stale dentry. */
189 ocfs2_inode_unlock(dir, 0);
190
191 bail:
192
193 trace_ocfs2_lookup_ret(ret);
194
195 return ret;
196 }
197
198 static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode)
199 {
200 struct inode *inode;
201 int status;
202
203 inode = new_inode(dir->i_sb);
204 if (!inode) {
205 mlog(ML_ERROR, "new_inode failed!\n");
206 return ERR_PTR(-ENOMEM);
207 }
208
209 /* populate as many fields early on as possible - many of
210 * these are used by the support functions here and in
211 * callers. */
212 if (S_ISDIR(mode))
213 set_nlink(inode, 2);
214 inode_init_owner(inode, dir, mode);
215 status = dquot_initialize(inode);
216 if (status)
217 return ERR_PTR(status);
218
219 return inode;
220 }
221
222 static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb,
223 struct dentry *dentry, struct inode *inode)
224 {
225 struct ocfs2_dentry_lock *dl = dentry->d_fsdata;
226
227 ocfs2_simple_drop_lockres(osb, &dl->dl_lockres);
228 ocfs2_lock_res_free(&dl->dl_lockres);
229 BUG_ON(dl->dl_count != 1);
230 spin_lock(&dentry_attach_lock);
231 dentry->d_fsdata = NULL;
232 spin_unlock(&dentry_attach_lock);
233 kfree(dl);
234 iput(inode);
235 }
236
237 static int ocfs2_mknod(struct inode *dir,
238 struct dentry *dentry,
239 umode_t mode,
240 dev_t dev)
241 {
242 int status = 0;
243 struct buffer_head *parent_fe_bh = NULL;
244 handle_t *handle = NULL;
245 struct ocfs2_super *osb;
246 struct ocfs2_dinode *dirfe;
247 struct buffer_head *new_fe_bh = NULL;
248 struct inode *inode = NULL;
249 struct ocfs2_alloc_context *inode_ac = NULL;
250 struct ocfs2_alloc_context *data_ac = NULL;
251 struct ocfs2_alloc_context *meta_ac = NULL;
252 int want_clusters = 0;
253 int want_meta = 0;
254 int xattr_credits = 0;
255 struct ocfs2_security_xattr_info si = {
256 .enable = 1,
257 };
258 int did_quota_inode = 0;
259 struct ocfs2_dir_lookup_result lookup = { NULL, };
260 sigset_t oldset;
261 int did_block_signals = 0;
262 struct posix_acl *default_acl = NULL, *acl = NULL;
263 struct ocfs2_dentry_lock *dl = NULL;
264
265 trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
266 (unsigned long long)OCFS2_I(dir)->ip_blkno,
267 (unsigned long)dev, mode);
268
269 status = dquot_initialize(dir);
270 if (status) {
271 mlog_errno(status);
272 return status;
273 }
274
275 /* get our super block */
276 osb = OCFS2_SB(dir->i_sb);
277
278 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
279 if (status < 0) {
280 if (status != -ENOENT)
281 mlog_errno(status);
282 return status;
283 }
284
285 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
286 status = -EMLINK;
287 goto leave;
288 }
289
290 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
291 if (!ocfs2_read_links_count(dirfe)) {
292 /* can't make a file in a deleted directory. */
293 status = -ENOENT;
294 goto leave;
295 }
296
297 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
298 dentry->d_name.len);
299 if (status)
300 goto leave;
301
302 /* get a spot inside the dir. */
303 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
304 dentry->d_name.name,
305 dentry->d_name.len, &lookup);
306 if (status < 0) {
307 mlog_errno(status);
308 goto leave;
309 }
310
311 /* reserve an inode spot */
312 status = ocfs2_reserve_new_inode(osb, &inode_ac);
313 if (status < 0) {
314 if (status != -ENOSPC)
315 mlog_errno(status);
316 goto leave;
317 }
318
319 inode = ocfs2_get_init_inode(dir, mode);
320 if (IS_ERR(inode)) {
321 status = PTR_ERR(inode);
322 inode = NULL;
323 mlog_errno(status);
324 goto leave;
325 }
326
327 /* get security xattr */
328 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
329 if (status) {
330 if (status == -EOPNOTSUPP)
331 si.enable = 0;
332 else {
333 mlog_errno(status);
334 goto leave;
335 }
336 }
337
338 /* calculate meta data/clusters for setting security and acl xattr */
339 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
340 &si, &want_clusters,
341 &xattr_credits, &want_meta);
342 if (status < 0) {
343 mlog_errno(status);
344 goto leave;
345 }
346
347 /* Reserve a cluster if creating an extent based directory. */
348 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
349 want_clusters += 1;
350
351 /* Dir indexing requires extra space as well */
352 if (ocfs2_supports_indexed_dirs(osb))
353 want_meta++;
354 }
355
356 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
357 if (status < 0) {
358 if (status != -ENOSPC)
359 mlog_errno(status);
360 goto leave;
361 }
362
363 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
364 if (status < 0) {
365 if (status != -ENOSPC)
366 mlog_errno(status);
367 goto leave;
368 }
369
370 status = posix_acl_create(dir, &mode, &default_acl, &acl);
371 if (status) {
372 mlog_errno(status);
373 goto leave;
374 }
375 /* update inode->i_mode after mask with "umask". */
376 inode->i_mode = mode;
377
378 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
379 S_ISDIR(mode),
380 xattr_credits));
381 if (IS_ERR(handle)) {
382 status = PTR_ERR(handle);
383 handle = NULL;
384 mlog_errno(status);
385 goto leave;
386 }
387
388 /* Starting to change things, restart is no longer possible. */
389 ocfs2_block_signals(&oldset);
390 did_block_signals = 1;
391
392 status = dquot_alloc_inode(inode);
393 if (status)
394 goto leave;
395 did_quota_inode = 1;
396
397 /* do the real work now. */
398 status = ocfs2_mknod_locked(osb, dir, inode, dev,
399 &new_fe_bh, parent_fe_bh, handle,
400 inode_ac);
401 if (status < 0) {
402 mlog_errno(status);
403 goto leave;
404 }
405
406 if (S_ISDIR(mode)) {
407 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
408 new_fe_bh, data_ac, meta_ac);
409 if (status < 0) {
410 mlog_errno(status);
411 goto leave;
412 }
413
414 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
415 parent_fe_bh,
416 OCFS2_JOURNAL_ACCESS_WRITE);
417 if (status < 0) {
418 mlog_errno(status);
419 goto leave;
420 }
421 ocfs2_add_links_count(dirfe, 1);
422 ocfs2_journal_dirty(handle, parent_fe_bh);
423 inc_nlink(dir);
424 }
425
426 if (default_acl) {
427 status = ocfs2_set_acl(handle, inode, new_fe_bh,
428 ACL_TYPE_DEFAULT, default_acl,
429 meta_ac, data_ac);
430 }
431 if (!status && acl) {
432 status = ocfs2_set_acl(handle, inode, new_fe_bh,
433 ACL_TYPE_ACCESS, acl,
434 meta_ac, data_ac);
435 }
436
437 if (status < 0) {
438 mlog_errno(status);
439 goto leave;
440 }
441
442 if (si.enable) {
443 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
444 meta_ac, data_ac);
445 if (status < 0) {
446 mlog_errno(status);
447 goto leave;
448 }
449 }
450
451 /*
452 * Do this before adding the entry to the directory. We add
453 * also set d_op after success so that ->d_iput() will cleanup
454 * the dentry lock even if ocfs2_add_entry() fails below.
455 */
456 status = ocfs2_dentry_attach_lock(dentry, inode,
457 OCFS2_I(dir)->ip_blkno);
458 if (status) {
459 mlog_errno(status);
460 goto leave;
461 }
462
463 dl = dentry->d_fsdata;
464
465 status = ocfs2_add_entry(handle, dentry, inode,
466 OCFS2_I(inode)->ip_blkno, parent_fe_bh,
467 &lookup);
468 if (status < 0) {
469 mlog_errno(status);
470 goto leave;
471 }
472
473 insert_inode_hash(inode);
474 d_instantiate(dentry, inode);
475 status = 0;
476 leave:
477 if (default_acl)
478 posix_acl_release(default_acl);
479 if (acl)
480 posix_acl_release(acl);
481 if (status < 0 && did_quota_inode)
482 dquot_free_inode(inode);
483 if (handle)
484 ocfs2_commit_trans(osb, handle);
485
486 ocfs2_inode_unlock(dir, 1);
487 if (did_block_signals)
488 ocfs2_unblock_signals(&oldset);
489
490 brelse(new_fe_bh);
491 brelse(parent_fe_bh);
492 kfree(si.value);
493
494 ocfs2_free_dir_lookup_result(&lookup);
495
496 if (inode_ac)
497 ocfs2_free_alloc_context(inode_ac);
498
499 if (data_ac)
500 ocfs2_free_alloc_context(data_ac);
501
502 if (meta_ac)
503 ocfs2_free_alloc_context(meta_ac);
504
505 /*
506 * We should call iput after the i_mutex of the bitmap been
507 * unlocked in ocfs2_free_alloc_context, or the
508 * ocfs2_delete_inode will mutex_lock again.
509 */
510 if ((status < 0) && inode) {
511 if (dl)
512 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
513
514 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
515 clear_nlink(inode);
516 iput(inode);
517 }
518
519 if (status)
520 mlog_errno(status);
521
522 return status;
523 }
524
525 static int __ocfs2_mknod_locked(struct inode *dir,
526 struct inode *inode,
527 dev_t dev,
528 struct buffer_head **new_fe_bh,
529 struct buffer_head *parent_fe_bh,
530 handle_t *handle,
531 struct ocfs2_alloc_context *inode_ac,
532 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
533 {
534 int status = 0;
535 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
536 struct ocfs2_dinode *fe = NULL;
537 struct ocfs2_extent_list *fel;
538 u16 feat;
539 struct ocfs2_inode_info *oi = OCFS2_I(inode);
540
541 *new_fe_bh = NULL;
542
543 /* populate as many fields early on as possible - many of
544 * these are used by the support functions here and in
545 * callers. */
546 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
547 OCFS2_I(inode)->ip_blkno = fe_blkno;
548 spin_lock(&osb->osb_lock);
549 inode->i_generation = osb->s_next_generation++;
550 spin_unlock(&osb->osb_lock);
551
552 *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
553 if (!*new_fe_bh) {
554 status = -ENOMEM;
555 mlog_errno(status);
556 goto leave;
557 }
558 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
559
560 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
561 *new_fe_bh,
562 OCFS2_JOURNAL_ACCESS_CREATE);
563 if (status < 0) {
564 mlog_errno(status);
565 goto leave;
566 }
567
568 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
569 memset(fe, 0, osb->sb->s_blocksize);
570
571 fe->i_generation = cpu_to_le32(inode->i_generation);
572 fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
573 fe->i_blkno = cpu_to_le64(fe_blkno);
574 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
575 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
576 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
577 fe->i_uid = cpu_to_le32(i_uid_read(inode));
578 fe->i_gid = cpu_to_le32(i_gid_read(inode));
579 fe->i_mode = cpu_to_le16(inode->i_mode);
580 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
581 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
582
583 ocfs2_set_links_count(fe, inode->i_nlink);
584
585 fe->i_last_eb_blk = 0;
586 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
587 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
588 fe->i_atime = fe->i_ctime = fe->i_mtime =
589 cpu_to_le64(CURRENT_TIME.tv_sec);
590 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
591 cpu_to_le32(CURRENT_TIME.tv_nsec);
592 fe->i_dtime = 0;
593
594 /*
595 * If supported, directories start with inline data. If inline
596 * isn't supported, but indexing is, we start them as indexed.
597 */
598 feat = le16_to_cpu(fe->i_dyn_features);
599 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
600 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
601
602 fe->id2.i_data.id_count = cpu_to_le16(
603 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
604 } else {
605 fel = &fe->id2.i_list;
606 fel->l_tree_depth = 0;
607 fel->l_next_free_rec = 0;
608 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
609 }
610
611 ocfs2_journal_dirty(handle, *new_fe_bh);
612
613 ocfs2_populate_inode(inode, fe, 1);
614 ocfs2_ci_set_new(osb, INODE_CACHE(inode));
615 if (!ocfs2_mount_local(osb)) {
616 status = ocfs2_create_new_inode_locks(inode);
617 if (status < 0)
618 mlog_errno(status);
619 }
620
621 oi->i_sync_tid = handle->h_transaction->t_tid;
622 oi->i_datasync_tid = handle->h_transaction->t_tid;
623
624 leave:
625 if (status < 0) {
626 if (*new_fe_bh) {
627 brelse(*new_fe_bh);
628 *new_fe_bh = NULL;
629 }
630 }
631
632 if (status)
633 mlog_errno(status);
634 return status;
635 }
636
637 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
638 struct inode *dir,
639 struct inode *inode,
640 dev_t dev,
641 struct buffer_head **new_fe_bh,
642 struct buffer_head *parent_fe_bh,
643 handle_t *handle,
644 struct ocfs2_alloc_context *inode_ac)
645 {
646 int status = 0;
647 u64 suballoc_loc, fe_blkno = 0;
648 u16 suballoc_bit;
649
650 *new_fe_bh = NULL;
651
652 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
653 inode_ac, &suballoc_loc,
654 &suballoc_bit, &fe_blkno);
655 if (status < 0) {
656 mlog_errno(status);
657 return status;
658 }
659
660 status = __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
661 parent_fe_bh, handle, inode_ac,
662 fe_blkno, suballoc_loc, suballoc_bit);
663 if (status < 0) {
664 u64 bg_blkno = ocfs2_which_suballoc_group(fe_blkno, suballoc_bit);
665 int tmp = ocfs2_free_suballoc_bits(handle, inode_ac->ac_inode,
666 inode_ac->ac_bh, suballoc_bit, bg_blkno, 1);
667 if (tmp)
668 mlog_errno(tmp);
669 }
670
671 return status;
672 }
673
674 static int ocfs2_mkdir(struct inode *dir,
675 struct dentry *dentry,
676 umode_t mode)
677 {
678 int ret;
679
680 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
681 OCFS2_I(dir)->ip_blkno, mode);
682 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
683 if (ret)
684 mlog_errno(ret);
685
686 return ret;
687 }
688
689 static int ocfs2_create(struct inode *dir,
690 struct dentry *dentry,
691 umode_t mode,
692 bool excl)
693 {
694 int ret;
695
696 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
697 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
698 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
699 if (ret)
700 mlog_errno(ret);
701
702 return ret;
703 }
704
705 static int ocfs2_link(struct dentry *old_dentry,
706 struct inode *dir,
707 struct dentry *dentry)
708 {
709 handle_t *handle;
710 struct inode *inode = d_inode(old_dentry);
711 struct inode *old_dir = d_inode(old_dentry->d_parent);
712 int err;
713 struct buffer_head *fe_bh = NULL;
714 struct buffer_head *old_dir_bh = NULL;
715 struct buffer_head *parent_fe_bh = NULL;
716 struct ocfs2_dinode *fe = NULL;
717 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
718 struct ocfs2_dir_lookup_result lookup = { NULL, };
719 sigset_t oldset;
720 u64 old_de_ino;
721
722 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
723 old_dentry->d_name.len, old_dentry->d_name.name,
724 dentry->d_name.len, dentry->d_name.name);
725
726 if (S_ISDIR(inode->i_mode))
727 return -EPERM;
728
729 err = dquot_initialize(dir);
730 if (err) {
731 mlog_errno(err);
732 return err;
733 }
734
735 err = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
736 &parent_fe_bh, dir, 0);
737 if (err < 0) {
738 if (err != -ENOENT)
739 mlog_errno(err);
740 return err;
741 }
742
743 /* make sure both dirs have bhs
744 * get an extra ref on old_dir_bh if old==new */
745 if (!parent_fe_bh) {
746 if (old_dir_bh) {
747 parent_fe_bh = old_dir_bh;
748 get_bh(parent_fe_bh);
749 } else {
750 mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str);
751 err = -EIO;
752 goto out;
753 }
754 }
755
756 if (!dir->i_nlink) {
757 err = -ENOENT;
758 goto out;
759 }
760
761 err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
762 old_dentry->d_name.len, &old_de_ino);
763 if (err) {
764 err = -ENOENT;
765 goto out;
766 }
767
768 /*
769 * Check whether another node removed the source inode while we
770 * were in the vfs.
771 */
772 if (old_de_ino != OCFS2_I(inode)->ip_blkno) {
773 err = -ENOENT;
774 goto out;
775 }
776
777 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
778 dentry->d_name.len);
779 if (err)
780 goto out;
781
782 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
783 dentry->d_name.name,
784 dentry->d_name.len, &lookup);
785 if (err < 0) {
786 mlog_errno(err);
787 goto out;
788 }
789
790 err = ocfs2_inode_lock(inode, &fe_bh, 1);
791 if (err < 0) {
792 if (err != -ENOENT)
793 mlog_errno(err);
794 goto out;
795 }
796
797 fe = (struct ocfs2_dinode *) fe_bh->b_data;
798 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
799 err = -EMLINK;
800 goto out_unlock_inode;
801 }
802
803 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
804 if (IS_ERR(handle)) {
805 err = PTR_ERR(handle);
806 handle = NULL;
807 mlog_errno(err);
808 goto out_unlock_inode;
809 }
810
811 /* Starting to change things, restart is no longer possible. */
812 ocfs2_block_signals(&oldset);
813
814 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
815 OCFS2_JOURNAL_ACCESS_WRITE);
816 if (err < 0) {
817 mlog_errno(err);
818 goto out_commit;
819 }
820
821 inc_nlink(inode);
822 inode->i_ctime = CURRENT_TIME;
823 ocfs2_set_links_count(fe, inode->i_nlink);
824 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
825 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
826 ocfs2_journal_dirty(handle, fe_bh);
827
828 err = ocfs2_add_entry(handle, dentry, inode,
829 OCFS2_I(inode)->ip_blkno,
830 parent_fe_bh, &lookup);
831 if (err) {
832 ocfs2_add_links_count(fe, -1);
833 drop_nlink(inode);
834 mlog_errno(err);
835 goto out_commit;
836 }
837
838 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
839 if (err) {
840 mlog_errno(err);
841 goto out_commit;
842 }
843
844 ihold(inode);
845 d_instantiate(dentry, inode);
846
847 out_commit:
848 ocfs2_commit_trans(osb, handle);
849 ocfs2_unblock_signals(&oldset);
850 out_unlock_inode:
851 ocfs2_inode_unlock(inode, 1);
852
853 out:
854 ocfs2_double_unlock(old_dir, dir);
855
856 brelse(fe_bh);
857 brelse(parent_fe_bh);
858 brelse(old_dir_bh);
859
860 ocfs2_free_dir_lookup_result(&lookup);
861
862 if (err)
863 mlog_errno(err);
864
865 return err;
866 }
867
868 /*
869 * Takes and drops an exclusive lock on the given dentry. This will
870 * force other nodes to drop it.
871 */
872 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
873 {
874 int ret;
875
876 ret = ocfs2_dentry_lock(dentry, 1);
877 if (ret)
878 mlog_errno(ret);
879 else
880 ocfs2_dentry_unlock(dentry, 1);
881
882 return ret;
883 }
884
885 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
886 {
887 if (S_ISDIR(inode->i_mode)) {
888 if (inode->i_nlink == 2)
889 return 1;
890 return 0;
891 }
892
893 if (inode->i_nlink == 1)
894 return 1;
895 return 0;
896 }
897
898 static int ocfs2_unlink(struct inode *dir,
899 struct dentry *dentry)
900 {
901 int status;
902 int child_locked = 0;
903 bool is_unlinkable = false;
904 struct inode *inode = d_inode(dentry);
905 struct inode *orphan_dir = NULL;
906 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
907 u64 blkno;
908 struct ocfs2_dinode *fe = NULL;
909 struct buffer_head *fe_bh = NULL;
910 struct buffer_head *parent_node_bh = NULL;
911 handle_t *handle = NULL;
912 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
913 struct ocfs2_dir_lookup_result lookup = { NULL, };
914 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
915
916 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
917 dentry->d_name.name,
918 (unsigned long long)OCFS2_I(dir)->ip_blkno,
919 (unsigned long long)OCFS2_I(inode)->ip_blkno);
920
921 status = dquot_initialize(dir);
922 if (status) {
923 mlog_errno(status);
924 return status;
925 }
926
927 BUG_ON(d_inode(dentry->d_parent) != dir);
928
929 if (inode == osb->root_inode)
930 return -EPERM;
931
932 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
933 OI_LS_PARENT);
934 if (status < 0) {
935 if (status != -ENOENT)
936 mlog_errno(status);
937 return status;
938 }
939
940 status = ocfs2_find_files_on_disk(dentry->d_name.name,
941 dentry->d_name.len, &blkno, dir,
942 &lookup);
943 if (status < 0) {
944 if (status != -ENOENT)
945 mlog_errno(status);
946 goto leave;
947 }
948
949 if (OCFS2_I(inode)->ip_blkno != blkno) {
950 status = -ENOENT;
951
952 trace_ocfs2_unlink_noent(
953 (unsigned long long)OCFS2_I(inode)->ip_blkno,
954 (unsigned long long)blkno,
955 OCFS2_I(inode)->ip_flags);
956 goto leave;
957 }
958
959 status = ocfs2_inode_lock(inode, &fe_bh, 1);
960 if (status < 0) {
961 if (status != -ENOENT)
962 mlog_errno(status);
963 goto leave;
964 }
965 child_locked = 1;
966
967 if (S_ISDIR(inode->i_mode)) {
968 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
969 status = -ENOTEMPTY;
970 goto leave;
971 }
972 }
973
974 status = ocfs2_remote_dentry_delete(dentry);
975 if (status < 0) {
976 /* This remote delete should succeed under all normal
977 * circumstances. */
978 mlog_errno(status);
979 goto leave;
980 }
981
982 if (ocfs2_inode_is_unlinkable(inode)) {
983 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
984 OCFS2_I(inode)->ip_blkno,
985 orphan_name, &orphan_insert,
986 false);
987 if (status < 0) {
988 mlog_errno(status);
989 goto leave;
990 }
991 is_unlinkable = true;
992 }
993
994 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
995 if (IS_ERR(handle)) {
996 status = PTR_ERR(handle);
997 handle = NULL;
998 mlog_errno(status);
999 goto leave;
1000 }
1001
1002 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
1003 OCFS2_JOURNAL_ACCESS_WRITE);
1004 if (status < 0) {
1005 mlog_errno(status);
1006 goto leave;
1007 }
1008
1009 fe = (struct ocfs2_dinode *) fe_bh->b_data;
1010
1011 /* delete the name from the parent dir */
1012 status = ocfs2_delete_entry(handle, dir, &lookup);
1013 if (status < 0) {
1014 mlog_errno(status);
1015 goto leave;
1016 }
1017
1018 if (S_ISDIR(inode->i_mode))
1019 drop_nlink(inode);
1020 drop_nlink(inode);
1021 ocfs2_set_links_count(fe, inode->i_nlink);
1022 ocfs2_journal_dirty(handle, fe_bh);
1023
1024 dir->i_ctime = dir->i_mtime = CURRENT_TIME;
1025 if (S_ISDIR(inode->i_mode))
1026 drop_nlink(dir);
1027
1028 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
1029 if (status < 0) {
1030 mlog_errno(status);
1031 if (S_ISDIR(inode->i_mode))
1032 inc_nlink(dir);
1033 goto leave;
1034 }
1035
1036 if (is_unlinkable) {
1037 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
1038 orphan_name, &orphan_insert, orphan_dir, false);
1039 if (status < 0)
1040 mlog_errno(status);
1041 }
1042
1043 leave:
1044 if (handle)
1045 ocfs2_commit_trans(osb, handle);
1046
1047 if (orphan_dir) {
1048 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1049 ocfs2_inode_unlock(orphan_dir, 1);
1050 mutex_unlock(&orphan_dir->i_mutex);
1051 iput(orphan_dir);
1052 }
1053
1054 if (child_locked)
1055 ocfs2_inode_unlock(inode, 1);
1056
1057 ocfs2_inode_unlock(dir, 1);
1058
1059 brelse(fe_bh);
1060 brelse(parent_node_bh);
1061
1062 ocfs2_free_dir_lookup_result(&orphan_insert);
1063 ocfs2_free_dir_lookup_result(&lookup);
1064
1065 if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
1066 mlog_errno(status);
1067
1068 return status;
1069 }
1070
1071 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb,
1072 u64 src_inode_no, u64 dest_inode_no)
1073 {
1074 int ret = 0, i = 0;
1075 u64 parent_inode_no = 0;
1076 u64 child_inode_no = src_inode_no;
1077 struct inode *child_inode;
1078
1079 #define MAX_LOOKUP_TIMES 32
1080 while (1) {
1081 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0);
1082 if (IS_ERR(child_inode)) {
1083 ret = PTR_ERR(child_inode);
1084 break;
1085 }
1086
1087 ret = ocfs2_inode_lock(child_inode, NULL, 0);
1088 if (ret < 0) {
1089 iput(child_inode);
1090 if (ret != -ENOENT)
1091 mlog_errno(ret);
1092 break;
1093 }
1094
1095 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2,
1096 &parent_inode_no);
1097 ocfs2_inode_unlock(child_inode, 0);
1098 iput(child_inode);
1099 if (ret < 0) {
1100 ret = -ENOENT;
1101 break;
1102 }
1103
1104 if (parent_inode_no == dest_inode_no) {
1105 ret = 1;
1106 break;
1107 }
1108
1109 if (parent_inode_no == osb->root_inode->i_ino) {
1110 ret = 0;
1111 break;
1112 }
1113
1114 child_inode_no = parent_inode_no;
1115
1116 if (++i >= MAX_LOOKUP_TIMES) {
1117 mlog(ML_NOTICE, "max lookup times reached, filesystem "
1118 "may have nested directories, "
1119 "src inode: %llu, dest inode: %llu.\n",
1120 (unsigned long long)src_inode_no,
1121 (unsigned long long)dest_inode_no);
1122 ret = 0;
1123 break;
1124 }
1125 }
1126
1127 return ret;
1128 }
1129
1130 /*
1131 * The only place this should be used is rename and link!
1132 * if they have the same id, then the 1st one is the only one locked.
1133 */
1134 static int ocfs2_double_lock(struct ocfs2_super *osb,
1135 struct buffer_head **bh1,
1136 struct inode *inode1,
1137 struct buffer_head **bh2,
1138 struct inode *inode2,
1139 int rename)
1140 {
1141 int status;
1142 int inode1_is_ancestor, inode2_is_ancestor;
1143 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
1144 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
1145
1146 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
1147 (unsigned long long)oi2->ip_blkno);
1148
1149 if (*bh1)
1150 *bh1 = NULL;
1151 if (*bh2)
1152 *bh2 = NULL;
1153
1154 /* we always want to lock the one with the lower lockid first.
1155 * and if they are nested, we lock ancestor first */
1156 if (oi1->ip_blkno != oi2->ip_blkno) {
1157 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno,
1158 oi1->ip_blkno);
1159 if (inode1_is_ancestor < 0) {
1160 status = inode1_is_ancestor;
1161 goto bail;
1162 }
1163
1164 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno,
1165 oi2->ip_blkno);
1166 if (inode2_is_ancestor < 0) {
1167 status = inode2_is_ancestor;
1168 goto bail;
1169 }
1170
1171 if ((inode1_is_ancestor == 1) ||
1172 (oi1->ip_blkno < oi2->ip_blkno &&
1173 inode2_is_ancestor == 0)) {
1174 /* switch id1 and id2 around */
1175 swap(bh2, bh1);
1176 swap(inode2, inode1);
1177 }
1178 /* lock id2 */
1179 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1180 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT);
1181 if (status < 0) {
1182 if (status != -ENOENT)
1183 mlog_errno(status);
1184 goto bail;
1185 }
1186 }
1187
1188 /* lock id1 */
1189 status = ocfs2_inode_lock_nested(inode1, bh1, 1,
1190 rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT);
1191 if (status < 0) {
1192 /*
1193 * An error return must mean that no cluster locks
1194 * were held on function exit.
1195 */
1196 if (oi1->ip_blkno != oi2->ip_blkno) {
1197 ocfs2_inode_unlock(inode2, 1);
1198 brelse(*bh2);
1199 *bh2 = NULL;
1200 }
1201
1202 if (status != -ENOENT)
1203 mlog_errno(status);
1204 }
1205
1206 trace_ocfs2_double_lock_end(
1207 (unsigned long long)OCFS2_I(inode1)->ip_blkno,
1208 (unsigned long long)OCFS2_I(inode2)->ip_blkno);
1209
1210 bail:
1211 if (status)
1212 mlog_errno(status);
1213 return status;
1214 }
1215
1216 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1217 {
1218 ocfs2_inode_unlock(inode1, 1);
1219
1220 if (inode1 != inode2)
1221 ocfs2_inode_unlock(inode2, 1);
1222 }
1223
1224 static int ocfs2_rename(struct inode *old_dir,
1225 struct dentry *old_dentry,
1226 struct inode *new_dir,
1227 struct dentry *new_dentry)
1228 {
1229 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1230 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1231 struct inode *old_inode = d_inode(old_dentry);
1232 struct inode *new_inode = d_inode(new_dentry);
1233 struct inode *orphan_dir = NULL;
1234 struct ocfs2_dinode *newfe = NULL;
1235 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1236 struct buffer_head *newfe_bh = NULL;
1237 struct buffer_head *old_inode_bh = NULL;
1238 struct ocfs2_super *osb = NULL;
1239 u64 newfe_blkno, old_de_ino;
1240 handle_t *handle = NULL;
1241 struct buffer_head *old_dir_bh = NULL;
1242 struct buffer_head *new_dir_bh = NULL;
1243 u32 old_dir_nlink = old_dir->i_nlink;
1244 struct ocfs2_dinode *old_di;
1245 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1246 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1247 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1248 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1249 struct ocfs2_dir_lookup_result target_insert = { NULL, };
1250 bool should_add_orphan = false;
1251
1252 /* At some point it might be nice to break this function up a
1253 * bit. */
1254
1255 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1256 old_dentry->d_name.len, old_dentry->d_name.name,
1257 new_dentry->d_name.len, new_dentry->d_name.name);
1258
1259 status = dquot_initialize(old_dir);
1260 if (status) {
1261 mlog_errno(status);
1262 goto bail;
1263 }
1264 status = dquot_initialize(new_dir);
1265 if (status) {
1266 mlog_errno(status);
1267 goto bail;
1268 }
1269
1270 osb = OCFS2_SB(old_dir->i_sb);
1271
1272 if (new_inode) {
1273 if (!igrab(new_inode))
1274 BUG();
1275 }
1276
1277 /* Assume a directory hierarchy thusly:
1278 * a/b/c
1279 * a/d
1280 * a,b,c, and d are all directories.
1281 *
1282 * from cwd of 'a' on both nodes:
1283 * node1: mv b/c d
1284 * node2: mv d b/c
1285 *
1286 * And that's why, just like the VFS, we need a file system
1287 * rename lock. */
1288 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1289 status = ocfs2_rename_lock(osb);
1290 if (status < 0) {
1291 mlog_errno(status);
1292 goto bail;
1293 }
1294 rename_lock = 1;
1295
1296 /* here we cannot guarantee the inodes haven't just been
1297 * changed, so check if they are nested again */
1298 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino,
1299 old_inode->i_ino);
1300 if (status < 0) {
1301 mlog_errno(status);
1302 goto bail;
1303 } else if (status == 1) {
1304 status = -EPERM;
1305 trace_ocfs2_rename_not_permitted(
1306 (unsigned long long)old_inode->i_ino,
1307 (unsigned long long)new_dir->i_ino);
1308 goto bail;
1309 }
1310 }
1311
1312 /* if old and new are the same, this'll just do one lock. */
1313 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1314 &new_dir_bh, new_dir, 1);
1315 if (status < 0) {
1316 mlog_errno(status);
1317 goto bail;
1318 }
1319 parents_locked = 1;
1320
1321 if (!new_dir->i_nlink) {
1322 status = -EACCES;
1323 goto bail;
1324 }
1325
1326 /* make sure both dirs have bhs
1327 * get an extra ref on old_dir_bh if old==new */
1328 if (!new_dir_bh) {
1329 if (old_dir_bh) {
1330 new_dir_bh = old_dir_bh;
1331 get_bh(new_dir_bh);
1332 } else {
1333 mlog(ML_ERROR, "no old_dir_bh!\n");
1334 status = -EIO;
1335 goto bail;
1336 }
1337 }
1338
1339 /*
1340 * Aside from allowing a meta data update, the locking here
1341 * also ensures that the downconvert thread on other nodes
1342 * won't have to concurrently downconvert the inode and the
1343 * dentry locks.
1344 */
1345 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1346 OI_LS_PARENT);
1347 if (status < 0) {
1348 if (status != -ENOENT)
1349 mlog_errno(status);
1350 goto bail;
1351 }
1352 old_child_locked = 1;
1353
1354 status = ocfs2_remote_dentry_delete(old_dentry);
1355 if (status < 0) {
1356 mlog_errno(status);
1357 goto bail;
1358 }
1359
1360 if (S_ISDIR(old_inode->i_mode)) {
1361 u64 old_inode_parent;
1362
1363 update_dot_dot = 1;
1364 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1365 old_inode,
1366 &old_inode_dot_dot_res);
1367 if (status) {
1368 status = -EIO;
1369 goto bail;
1370 }
1371
1372 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1373 status = -EIO;
1374 goto bail;
1375 }
1376
1377 if (!new_inode && new_dir != old_dir &&
1378 new_dir->i_nlink >= ocfs2_link_max(osb)) {
1379 status = -EMLINK;
1380 goto bail;
1381 }
1382 }
1383
1384 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1385 old_dentry->d_name.len,
1386 &old_de_ino);
1387 if (status) {
1388 status = -ENOENT;
1389 goto bail;
1390 }
1391
1392 /*
1393 * Check for inode number is _not_ due to possible IO errors.
1394 * We might rmdir the source, keep it as pwd of some process
1395 * and merrily kill the link to whatever was created under the
1396 * same name. Goodbye sticky bit ;-<
1397 */
1398 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1399 status = -ENOENT;
1400 goto bail;
1401 }
1402
1403 /* check if the target already exists (in which case we need
1404 * to delete it */
1405 status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1406 new_dentry->d_name.len,
1407 &newfe_blkno, new_dir,
1408 &target_lookup_res);
1409 /* The only error we allow here is -ENOENT because the new
1410 * file not existing is perfectly valid. */
1411 if ((status < 0) && (status != -ENOENT)) {
1412 /* If we cannot find the file specified we should just */
1413 /* return the error... */
1414 mlog_errno(status);
1415 goto bail;
1416 }
1417 if (status == 0)
1418 target_exists = 1;
1419
1420 if (!target_exists && new_inode) {
1421 /*
1422 * Target was unlinked by another node while we were
1423 * waiting to get to ocfs2_rename(). There isn't
1424 * anything we can do here to help the situation, so
1425 * bubble up the appropriate error.
1426 */
1427 status = -ENOENT;
1428 goto bail;
1429 }
1430
1431 /* In case we need to overwrite an existing file, we blow it
1432 * away first */
1433 if (target_exists) {
1434 /* VFS didn't think there existed an inode here, but
1435 * someone else in the cluster must have raced our
1436 * rename to create one. Today we error cleanly, in
1437 * the future we should consider calling iget to build
1438 * a new struct inode for this entry. */
1439 if (!new_inode) {
1440 status = -EACCES;
1441
1442 trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1443 new_dentry->d_name.name);
1444 goto bail;
1445 }
1446
1447 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1448 status = -EACCES;
1449
1450 trace_ocfs2_rename_disagree(
1451 (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1452 (unsigned long long)newfe_blkno,
1453 OCFS2_I(new_inode)->ip_flags);
1454 goto bail;
1455 }
1456
1457 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1458 if (status < 0) {
1459 if (status != -ENOENT)
1460 mlog_errno(status);
1461 goto bail;
1462 }
1463 new_child_locked = 1;
1464
1465 status = ocfs2_remote_dentry_delete(new_dentry);
1466 if (status < 0) {
1467 mlog_errno(status);
1468 goto bail;
1469 }
1470
1471 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1472
1473 trace_ocfs2_rename_over_existing(
1474 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1475 (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1476
1477 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1478 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1479 OCFS2_I(new_inode)->ip_blkno,
1480 orphan_name, &orphan_insert,
1481 false);
1482 if (status < 0) {
1483 mlog_errno(status);
1484 goto bail;
1485 }
1486 should_add_orphan = true;
1487 }
1488 } else {
1489 BUG_ON(d_inode(new_dentry->d_parent) != new_dir);
1490
1491 status = ocfs2_check_dir_for_entry(new_dir,
1492 new_dentry->d_name.name,
1493 new_dentry->d_name.len);
1494 if (status)
1495 goto bail;
1496
1497 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1498 new_dentry->d_name.name,
1499 new_dentry->d_name.len,
1500 &target_insert);
1501 if (status < 0) {
1502 mlog_errno(status);
1503 goto bail;
1504 }
1505 }
1506
1507 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1508 if (IS_ERR(handle)) {
1509 status = PTR_ERR(handle);
1510 handle = NULL;
1511 mlog_errno(status);
1512 goto bail;
1513 }
1514
1515 if (target_exists) {
1516 if (S_ISDIR(new_inode->i_mode)) {
1517 if (new_inode->i_nlink != 2 ||
1518 !ocfs2_empty_dir(new_inode)) {
1519 status = -ENOTEMPTY;
1520 goto bail;
1521 }
1522 }
1523 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1524 newfe_bh,
1525 OCFS2_JOURNAL_ACCESS_WRITE);
1526 if (status < 0) {
1527 mlog_errno(status);
1528 goto bail;
1529 }
1530
1531 /* change the dirent to point to the correct inode */
1532 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1533 old_inode);
1534 if (status < 0) {
1535 mlog_errno(status);
1536 goto bail;
1537 }
1538 new_dir->i_version++;
1539
1540 if (S_ISDIR(new_inode->i_mode))
1541 ocfs2_set_links_count(newfe, 0);
1542 else
1543 ocfs2_add_links_count(newfe, -1);
1544 ocfs2_journal_dirty(handle, newfe_bh);
1545 if (should_add_orphan) {
1546 status = ocfs2_orphan_add(osb, handle, new_inode,
1547 newfe_bh, orphan_name,
1548 &orphan_insert, orphan_dir, false);
1549 if (status < 0) {
1550 mlog_errno(status);
1551 goto bail;
1552 }
1553 }
1554 } else {
1555 /* if the name was not found in new_dir, add it now */
1556 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1557 OCFS2_I(old_inode)->ip_blkno,
1558 new_dir_bh, &target_insert);
1559 }
1560
1561 old_inode->i_ctime = CURRENT_TIME;
1562 mark_inode_dirty(old_inode);
1563
1564 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1565 old_inode_bh,
1566 OCFS2_JOURNAL_ACCESS_WRITE);
1567 if (status >= 0) {
1568 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1569
1570 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1571 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1572 ocfs2_journal_dirty(handle, old_inode_bh);
1573 } else
1574 mlog_errno(status);
1575
1576 /*
1577 * Now that the name has been added to new_dir, remove the old name.
1578 *
1579 * We don't keep any directory entry context around until now
1580 * because the insert might have changed the type of directory
1581 * we're dealing with.
1582 */
1583 status = ocfs2_find_entry(old_dentry->d_name.name,
1584 old_dentry->d_name.len, old_dir,
1585 &old_entry_lookup);
1586 if (status) {
1587 if (!is_journal_aborted(osb->journal->j_journal)) {
1588 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1589 "is not deleted.",
1590 new_dentry->d_name.len, new_dentry->d_name.name,
1591 old_dentry->d_name.len, old_dentry->d_name.name);
1592 }
1593 goto bail;
1594 }
1595
1596 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1597 if (status < 0) {
1598 mlog_errno(status);
1599 if (!is_journal_aborted(osb->journal->j_journal)) {
1600 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1601 "is not deleted.",
1602 new_dentry->d_name.len, new_dentry->d_name.name,
1603 old_dentry->d_name.len, old_dentry->d_name.name);
1604 }
1605 goto bail;
1606 }
1607
1608 if (new_inode) {
1609 drop_nlink(new_inode);
1610 new_inode->i_ctime = CURRENT_TIME;
1611 }
1612 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1613
1614 if (update_dot_dot) {
1615 status = ocfs2_update_entry(old_inode, handle,
1616 &old_inode_dot_dot_res, new_dir);
1617 drop_nlink(old_dir);
1618 if (new_inode) {
1619 drop_nlink(new_inode);
1620 } else {
1621 inc_nlink(new_dir);
1622 mark_inode_dirty(new_dir);
1623 }
1624 }
1625 mark_inode_dirty(old_dir);
1626 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1627 if (new_inode) {
1628 mark_inode_dirty(new_inode);
1629 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1630 }
1631
1632 if (old_dir != new_dir) {
1633 /* Keep the same times on both directories.*/
1634 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1635
1636 /*
1637 * This will also pick up the i_nlink change from the
1638 * block above.
1639 */
1640 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1641 }
1642
1643 if (old_dir_nlink != old_dir->i_nlink) {
1644 if (!old_dir_bh) {
1645 mlog(ML_ERROR, "need to change nlink for old dir "
1646 "%llu from %d to %d but bh is NULL!\n",
1647 (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1648 (int)old_dir_nlink, old_dir->i_nlink);
1649 } else {
1650 struct ocfs2_dinode *fe;
1651 status = ocfs2_journal_access_di(handle,
1652 INODE_CACHE(old_dir),
1653 old_dir_bh,
1654 OCFS2_JOURNAL_ACCESS_WRITE);
1655 fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1656 ocfs2_set_links_count(fe, old_dir->i_nlink);
1657 ocfs2_journal_dirty(handle, old_dir_bh);
1658 }
1659 }
1660 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1661 status = 0;
1662 bail:
1663 if (handle)
1664 ocfs2_commit_trans(osb, handle);
1665
1666 if (orphan_dir) {
1667 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1668 ocfs2_inode_unlock(orphan_dir, 1);
1669 mutex_unlock(&orphan_dir->i_mutex);
1670 iput(orphan_dir);
1671 }
1672
1673 if (new_child_locked)
1674 ocfs2_inode_unlock(new_inode, 1);
1675
1676 if (old_child_locked)
1677 ocfs2_inode_unlock(old_inode, 1);
1678
1679 if (parents_locked)
1680 ocfs2_double_unlock(old_dir, new_dir);
1681
1682 if (rename_lock)
1683 ocfs2_rename_unlock(osb);
1684
1685 if (new_inode)
1686 sync_mapping_buffers(old_inode->i_mapping);
1687
1688 if (new_inode)
1689 iput(new_inode);
1690
1691 ocfs2_free_dir_lookup_result(&target_lookup_res);
1692 ocfs2_free_dir_lookup_result(&old_entry_lookup);
1693 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1694 ocfs2_free_dir_lookup_result(&orphan_insert);
1695 ocfs2_free_dir_lookup_result(&target_insert);
1696
1697 brelse(newfe_bh);
1698 brelse(old_inode_bh);
1699 brelse(old_dir_bh);
1700 brelse(new_dir_bh);
1701
1702 if (status)
1703 mlog_errno(status);
1704
1705 return status;
1706 }
1707
1708 /*
1709 * we expect i_size = strlen(symname). Copy symname into the file
1710 * data, including the null terminator.
1711 */
1712 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1713 handle_t *handle,
1714 struct inode *inode,
1715 const char *symname)
1716 {
1717 struct buffer_head **bhs = NULL;
1718 const char *c;
1719 struct super_block *sb = osb->sb;
1720 u64 p_blkno, p_blocks;
1721 int virtual, blocks, status, i, bytes_left;
1722
1723 bytes_left = i_size_read(inode) + 1;
1724 /* we can't trust i_blocks because we're actually going to
1725 * write i_size + 1 bytes. */
1726 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1727
1728 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1729 i_size_read(inode), blocks);
1730
1731 /* Sanity check -- make sure we're going to fit. */
1732 if (bytes_left >
1733 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1734 status = -EIO;
1735 mlog_errno(status);
1736 goto bail;
1737 }
1738
1739 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1740 if (!bhs) {
1741 status = -ENOMEM;
1742 mlog_errno(status);
1743 goto bail;
1744 }
1745
1746 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1747 NULL);
1748 if (status < 0) {
1749 mlog_errno(status);
1750 goto bail;
1751 }
1752
1753 /* links can never be larger than one cluster so we know this
1754 * is all going to be contiguous, but do a sanity check
1755 * anyway. */
1756 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1757 status = -EIO;
1758 mlog_errno(status);
1759 goto bail;
1760 }
1761
1762 virtual = 0;
1763 while(bytes_left > 0) {
1764 c = &symname[virtual * sb->s_blocksize];
1765
1766 bhs[virtual] = sb_getblk(sb, p_blkno);
1767 if (!bhs[virtual]) {
1768 status = -ENOMEM;
1769 mlog_errno(status);
1770 goto bail;
1771 }
1772 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1773 bhs[virtual]);
1774
1775 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1776 bhs[virtual],
1777 OCFS2_JOURNAL_ACCESS_CREATE);
1778 if (status < 0) {
1779 mlog_errno(status);
1780 goto bail;
1781 }
1782
1783 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1784
1785 memcpy(bhs[virtual]->b_data, c,
1786 (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1787 bytes_left);
1788
1789 ocfs2_journal_dirty(handle, bhs[virtual]);
1790
1791 virtual++;
1792 p_blkno++;
1793 bytes_left -= sb->s_blocksize;
1794 }
1795
1796 status = 0;
1797 bail:
1798
1799 if (bhs) {
1800 for(i = 0; i < blocks; i++)
1801 brelse(bhs[i]);
1802 kfree(bhs);
1803 }
1804
1805 if (status)
1806 mlog_errno(status);
1807 return status;
1808 }
1809
1810 static int ocfs2_symlink(struct inode *dir,
1811 struct dentry *dentry,
1812 const char *symname)
1813 {
1814 int status, l, credits;
1815 u64 newsize;
1816 struct ocfs2_super *osb = NULL;
1817 struct inode *inode = NULL;
1818 struct super_block *sb;
1819 struct buffer_head *new_fe_bh = NULL;
1820 struct buffer_head *parent_fe_bh = NULL;
1821 struct ocfs2_dinode *fe = NULL;
1822 struct ocfs2_dinode *dirfe;
1823 handle_t *handle = NULL;
1824 struct ocfs2_alloc_context *inode_ac = NULL;
1825 struct ocfs2_alloc_context *data_ac = NULL;
1826 struct ocfs2_alloc_context *xattr_ac = NULL;
1827 int want_clusters = 0;
1828 int xattr_credits = 0;
1829 struct ocfs2_security_xattr_info si = {
1830 .enable = 1,
1831 };
1832 int did_quota = 0, did_quota_inode = 0;
1833 struct ocfs2_dir_lookup_result lookup = { NULL, };
1834 sigset_t oldset;
1835 int did_block_signals = 0;
1836 struct ocfs2_dentry_lock *dl = NULL;
1837
1838 trace_ocfs2_symlink_begin(dir, dentry, symname,
1839 dentry->d_name.len, dentry->d_name.name);
1840
1841 status = dquot_initialize(dir);
1842 if (status) {
1843 mlog_errno(status);
1844 goto bail;
1845 }
1846
1847 sb = dir->i_sb;
1848 osb = OCFS2_SB(sb);
1849
1850 l = strlen(symname) + 1;
1851
1852 credits = ocfs2_calc_symlink_credits(sb);
1853
1854 /* lock the parent directory */
1855 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1856 if (status < 0) {
1857 if (status != -ENOENT)
1858 mlog_errno(status);
1859 return status;
1860 }
1861
1862 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1863 if (!ocfs2_read_links_count(dirfe)) {
1864 /* can't make a file in a deleted directory. */
1865 status = -ENOENT;
1866 goto bail;
1867 }
1868
1869 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1870 dentry->d_name.len);
1871 if (status)
1872 goto bail;
1873
1874 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1875 dentry->d_name.name,
1876 dentry->d_name.len, &lookup);
1877 if (status < 0) {
1878 mlog_errno(status);
1879 goto bail;
1880 }
1881
1882 status = ocfs2_reserve_new_inode(osb, &inode_ac);
1883 if (status < 0) {
1884 if (status != -ENOSPC)
1885 mlog_errno(status);
1886 goto bail;
1887 }
1888
1889 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1890 if (IS_ERR(inode)) {
1891 status = PTR_ERR(inode);
1892 inode = NULL;
1893 mlog_errno(status);
1894 goto bail;
1895 }
1896
1897 /* get security xattr */
1898 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1899 if (status) {
1900 if (status == -EOPNOTSUPP)
1901 si.enable = 0;
1902 else {
1903 mlog_errno(status);
1904 goto bail;
1905 }
1906 }
1907
1908 /* calculate meta data/clusters for setting security xattr */
1909 if (si.enable) {
1910 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1911 &xattr_credits, &xattr_ac);
1912 if (status < 0) {
1913 mlog_errno(status);
1914 goto bail;
1915 }
1916 }
1917
1918 /* don't reserve bitmap space for fast symlinks. */
1919 if (l > ocfs2_fast_symlink_chars(sb))
1920 want_clusters += 1;
1921
1922 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1923 if (status < 0) {
1924 if (status != -ENOSPC)
1925 mlog_errno(status);
1926 goto bail;
1927 }
1928
1929 handle = ocfs2_start_trans(osb, credits + xattr_credits);
1930 if (IS_ERR(handle)) {
1931 status = PTR_ERR(handle);
1932 handle = NULL;
1933 mlog_errno(status);
1934 goto bail;
1935 }
1936
1937 /* Starting to change things, restart is no longer possible. */
1938 ocfs2_block_signals(&oldset);
1939 did_block_signals = 1;
1940
1941 status = dquot_alloc_inode(inode);
1942 if (status)
1943 goto bail;
1944 did_quota_inode = 1;
1945
1946 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1947 dentry->d_name.name,
1948 (unsigned long long)OCFS2_I(dir)->ip_blkno,
1949 inode->i_mode);
1950
1951 status = ocfs2_mknod_locked(osb, dir, inode,
1952 0, &new_fe_bh, parent_fe_bh, handle,
1953 inode_ac);
1954 if (status < 0) {
1955 mlog_errno(status);
1956 goto bail;
1957 }
1958
1959 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1960 inode->i_rdev = 0;
1961 newsize = l - 1;
1962 inode->i_op = &ocfs2_symlink_inode_operations;
1963 if (l > ocfs2_fast_symlink_chars(sb)) {
1964 u32 offset = 0;
1965
1966 status = dquot_alloc_space_nodirty(inode,
1967 ocfs2_clusters_to_bytes(osb->sb, 1));
1968 if (status)
1969 goto bail;
1970 did_quota = 1;
1971 inode->i_mapping->a_ops = &ocfs2_aops;
1972 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1973 new_fe_bh,
1974 handle, data_ac, NULL,
1975 NULL);
1976 if (status < 0) {
1977 if (status != -ENOSPC && status != -EINTR) {
1978 mlog(ML_ERROR,
1979 "Failed to extend file to %llu\n",
1980 (unsigned long long)newsize);
1981 mlog_errno(status);
1982 status = -ENOSPC;
1983 }
1984 goto bail;
1985 }
1986 i_size_write(inode, newsize);
1987 inode->i_blocks = ocfs2_inode_sector_count(inode);
1988 } else {
1989 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1990 memcpy((char *) fe->id2.i_symlink, symname, l);
1991 i_size_write(inode, newsize);
1992 inode->i_blocks = 0;
1993 }
1994
1995 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1996 if (status < 0) {
1997 mlog_errno(status);
1998 goto bail;
1999 }
2000
2001 if (!ocfs2_inode_is_fast_symlink(inode)) {
2002 status = ocfs2_create_symlink_data(osb, handle, inode,
2003 symname);
2004 if (status < 0) {
2005 mlog_errno(status);
2006 goto bail;
2007 }
2008 }
2009
2010 if (si.enable) {
2011 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
2012 xattr_ac, data_ac);
2013 if (status < 0) {
2014 mlog_errno(status);
2015 goto bail;
2016 }
2017 }
2018
2019 /*
2020 * Do this before adding the entry to the directory. We add
2021 * also set d_op after success so that ->d_iput() will cleanup
2022 * the dentry lock even if ocfs2_add_entry() fails below.
2023 */
2024 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
2025 if (status) {
2026 mlog_errno(status);
2027 goto bail;
2028 }
2029
2030 dl = dentry->d_fsdata;
2031
2032 status = ocfs2_add_entry(handle, dentry, inode,
2033 le64_to_cpu(fe->i_blkno), parent_fe_bh,
2034 &lookup);
2035 if (status < 0) {
2036 mlog_errno(status);
2037 goto bail;
2038 }
2039
2040 insert_inode_hash(inode);
2041 d_instantiate(dentry, inode);
2042 bail:
2043 if (status < 0 && did_quota)
2044 dquot_free_space_nodirty(inode,
2045 ocfs2_clusters_to_bytes(osb->sb, 1));
2046 if (status < 0 && did_quota_inode)
2047 dquot_free_inode(inode);
2048 if (handle)
2049 ocfs2_commit_trans(osb, handle);
2050
2051 ocfs2_inode_unlock(dir, 1);
2052 if (did_block_signals)
2053 ocfs2_unblock_signals(&oldset);
2054
2055 brelse(new_fe_bh);
2056 brelse(parent_fe_bh);
2057 kfree(si.value);
2058 ocfs2_free_dir_lookup_result(&lookup);
2059 if (inode_ac)
2060 ocfs2_free_alloc_context(inode_ac);
2061 if (data_ac)
2062 ocfs2_free_alloc_context(data_ac);
2063 if (xattr_ac)
2064 ocfs2_free_alloc_context(xattr_ac);
2065 if ((status < 0) && inode) {
2066 if (dl)
2067 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2068
2069 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
2070 clear_nlink(inode);
2071 iput(inode);
2072 }
2073
2074 if (status)
2075 mlog_errno(status);
2076
2077 return status;
2078 }
2079
2080 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2081 {
2082 int status, namelen;
2083
2084 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2085 (long long)blkno);
2086 if (namelen <= 0) {
2087 if (namelen)
2088 status = namelen;
2089 else
2090 status = -EINVAL;
2091 mlog_errno(status);
2092 goto bail;
2093 }
2094 if (namelen != OCFS2_ORPHAN_NAMELEN) {
2095 status = -EINVAL;
2096 mlog_errno(status);
2097 goto bail;
2098 }
2099
2100 trace_ocfs2_blkno_stringify(blkno, name, namelen);
2101
2102 status = 0;
2103 bail:
2104 if (status < 0)
2105 mlog_errno(status);
2106 return status;
2107 }
2108
2109 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2110 struct inode **ret_orphan_dir,
2111 struct buffer_head **ret_orphan_dir_bh)
2112 {
2113 struct inode *orphan_dir_inode;
2114 struct buffer_head *orphan_dir_bh = NULL;
2115 int ret = 0;
2116
2117 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2118 ORPHAN_DIR_SYSTEM_INODE,
2119 osb->slot_num);
2120 if (!orphan_dir_inode) {
2121 ret = -ENOENT;
2122 mlog_errno(ret);
2123 return ret;
2124 }
2125
2126 mutex_lock(&orphan_dir_inode->i_mutex);
2127
2128 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2129 if (ret < 0) {
2130 mutex_unlock(&orphan_dir_inode->i_mutex);
2131 iput(orphan_dir_inode);
2132
2133 mlog_errno(ret);
2134 return ret;
2135 }
2136
2137 *ret_orphan_dir = orphan_dir_inode;
2138 *ret_orphan_dir_bh = orphan_dir_bh;
2139
2140 return 0;
2141 }
2142
2143 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2144 struct buffer_head *orphan_dir_bh,
2145 u64 blkno,
2146 char *name,
2147 struct ocfs2_dir_lookup_result *lookup,
2148 bool dio)
2149 {
2150 int ret;
2151 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2152 int namelen = dio ?
2153 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2154 OCFS2_ORPHAN_NAMELEN;
2155
2156 if (dio) {
2157 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2158 OCFS2_DIO_ORPHAN_PREFIX);
2159 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2160 ret = -EINVAL;
2161 mlog_errno(ret);
2162 return ret;
2163 }
2164
2165 ret = ocfs2_blkno_stringify(blkno,
2166 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2167 } else
2168 ret = ocfs2_blkno_stringify(blkno, name);
2169 if (ret < 0) {
2170 mlog_errno(ret);
2171 return ret;
2172 }
2173
2174 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2175 orphan_dir_bh, name,
2176 namelen, lookup);
2177 if (ret < 0) {
2178 mlog_errno(ret);
2179 return ret;
2180 }
2181
2182 return 0;
2183 }
2184
2185 /**
2186 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2187 * insertion of an orphan.
2188 * @osb: ocfs2 file system
2189 * @ret_orphan_dir: Orphan dir inode - returned locked!
2190 * @blkno: Actual block number of the inode to be inserted into orphan dir.
2191 * @lookup: dir lookup result, to be passed back into functions like
2192 * ocfs2_orphan_add
2193 *
2194 * Returns zero on success and the ret_orphan_dir, name and lookup
2195 * fields will be populated.
2196 *
2197 * Returns non-zero on failure.
2198 */
2199 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2200 struct inode **ret_orphan_dir,
2201 u64 blkno,
2202 char *name,
2203 struct ocfs2_dir_lookup_result *lookup,
2204 bool dio)
2205 {
2206 struct inode *orphan_dir_inode = NULL;
2207 struct buffer_head *orphan_dir_bh = NULL;
2208 int ret = 0;
2209
2210 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2211 &orphan_dir_bh);
2212 if (ret < 0) {
2213 mlog_errno(ret);
2214 return ret;
2215 }
2216
2217 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2218 blkno, name, lookup, dio);
2219 if (ret < 0) {
2220 mlog_errno(ret);
2221 goto out;
2222 }
2223
2224 *ret_orphan_dir = orphan_dir_inode;
2225
2226 out:
2227 brelse(orphan_dir_bh);
2228
2229 if (ret) {
2230 ocfs2_inode_unlock(orphan_dir_inode, 1);
2231 mutex_unlock(&orphan_dir_inode->i_mutex);
2232 iput(orphan_dir_inode);
2233 }
2234
2235 if (ret)
2236 mlog_errno(ret);
2237 return ret;
2238 }
2239
2240 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2241 handle_t *handle,
2242 struct inode *inode,
2243 struct buffer_head *fe_bh,
2244 char *name,
2245 struct ocfs2_dir_lookup_result *lookup,
2246 struct inode *orphan_dir_inode,
2247 bool dio)
2248 {
2249 struct buffer_head *orphan_dir_bh = NULL;
2250 int status = 0;
2251 struct ocfs2_dinode *orphan_fe;
2252 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2253 int namelen = dio ?
2254 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2255 OCFS2_ORPHAN_NAMELEN;
2256
2257 trace_ocfs2_orphan_add_begin(
2258 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2259
2260 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2261 if (status < 0) {
2262 mlog_errno(status);
2263 goto leave;
2264 }
2265
2266 status = ocfs2_journal_access_di(handle,
2267 INODE_CACHE(orphan_dir_inode),
2268 orphan_dir_bh,
2269 OCFS2_JOURNAL_ACCESS_WRITE);
2270 if (status < 0) {
2271 mlog_errno(status);
2272 goto leave;
2273 }
2274
2275 /*
2276 * We're going to journal the change of i_flags and i_orphaned_slot.
2277 * It's safe anyway, though some callers may duplicate the journaling.
2278 * Journaling within the func just make the logic look more
2279 * straightforward.
2280 */
2281 status = ocfs2_journal_access_di(handle,
2282 INODE_CACHE(inode),
2283 fe_bh,
2284 OCFS2_JOURNAL_ACCESS_WRITE);
2285 if (status < 0) {
2286 mlog_errno(status);
2287 goto leave;
2288 }
2289
2290 /* we're a cluster, and nlink can change on disk from
2291 * underneath us... */
2292 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2293 if (S_ISDIR(inode->i_mode))
2294 ocfs2_add_links_count(orphan_fe, 1);
2295 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2296 ocfs2_journal_dirty(handle, orphan_dir_bh);
2297
2298 status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2299 namelen, inode,
2300 OCFS2_I(inode)->ip_blkno,
2301 orphan_dir_bh, lookup);
2302 if (status < 0) {
2303 mlog_errno(status);
2304 goto rollback;
2305 }
2306
2307 if (dio) {
2308 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan
2309 * slot.
2310 */
2311 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2312 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num);
2313 } else {
2314 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2315 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2316
2317 /* Record which orphan dir our inode now resides
2318 * in. delete_inode will use this to determine which orphan
2319 * dir to lock. */
2320 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2321 }
2322
2323 ocfs2_journal_dirty(handle, fe_bh);
2324
2325 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2326 osb->slot_num);
2327
2328 rollback:
2329 if (status < 0) {
2330 if (S_ISDIR(inode->i_mode))
2331 ocfs2_add_links_count(orphan_fe, -1);
2332 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2333 }
2334
2335 leave:
2336 brelse(orphan_dir_bh);
2337
2338 return status;
2339 }
2340
2341 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2342 int ocfs2_orphan_del(struct ocfs2_super *osb,
2343 handle_t *handle,
2344 struct inode *orphan_dir_inode,
2345 struct inode *inode,
2346 struct buffer_head *orphan_dir_bh,
2347 bool dio)
2348 {
2349 const int namelen = OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN;
2350 char name[namelen + 1];
2351 struct ocfs2_dinode *orphan_fe;
2352 int status = 0;
2353 struct ocfs2_dir_lookup_result lookup = { NULL, };
2354
2355 if (dio) {
2356 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2357 OCFS2_DIO_ORPHAN_PREFIX);
2358 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2359 status = -EINVAL;
2360 mlog_errno(status);
2361 return status;
2362 }
2363
2364 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno,
2365 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2366 } else
2367 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2368 if (status < 0) {
2369 mlog_errno(status);
2370 goto leave;
2371 }
2372
2373 trace_ocfs2_orphan_del(
2374 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2375 name, strlen(name));
2376
2377 /* find it's spot in the orphan directory */
2378 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode,
2379 &lookup);
2380 if (status) {
2381 mlog_errno(status);
2382 goto leave;
2383 }
2384
2385 /* remove it from the orphan directory */
2386 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2387 if (status < 0) {
2388 mlog_errno(status);
2389 goto leave;
2390 }
2391
2392 status = ocfs2_journal_access_di(handle,
2393 INODE_CACHE(orphan_dir_inode),
2394 orphan_dir_bh,
2395 OCFS2_JOURNAL_ACCESS_WRITE);
2396 if (status < 0) {
2397 mlog_errno(status);
2398 goto leave;
2399 }
2400
2401 /* do the i_nlink dance! :) */
2402 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2403 if (S_ISDIR(inode->i_mode))
2404 ocfs2_add_links_count(orphan_fe, -1);
2405 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2406 ocfs2_journal_dirty(handle, orphan_dir_bh);
2407
2408 leave:
2409 ocfs2_free_dir_lookup_result(&lookup);
2410
2411 if (status)
2412 mlog_errno(status);
2413 return status;
2414 }
2415
2416 /**
2417 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2418 * allocated file. This is different from the typical 'add to orphan dir'
2419 * operation in that the inode does not yet exist. This is a problem because
2420 * the orphan dir stringifies the inode block number to come up with it's
2421 * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2422 * problem. This function works around it by calling deeper into the orphan
2423 * and suballoc code than other callers. Use this only by necessity.
2424 * @dir: The directory which this inode will ultimately wind up under - not the
2425 * orphan dir!
2426 * @dir_bh: buffer_head the @dir inode block
2427 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2428 * with the string to be used for orphan dirent. Pass back to the orphan dir
2429 * code.
2430 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2431 * dir code.
2432 * @ret_di_blkno: block number where the new inode will be allocated.
2433 * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2434 * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2435 *
2436 * Returns zero on success and the ret_orphan_dir, name and lookup
2437 * fields will be populated.
2438 *
2439 * Returns non-zero on failure.
2440 */
2441 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2442 struct buffer_head *dir_bh,
2443 char *orphan_name,
2444 struct inode **ret_orphan_dir,
2445 u64 *ret_di_blkno,
2446 struct ocfs2_dir_lookup_result *orphan_insert,
2447 struct ocfs2_alloc_context **ret_inode_ac)
2448 {
2449 int ret;
2450 u64 di_blkno;
2451 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2452 struct inode *orphan_dir = NULL;
2453 struct buffer_head *orphan_dir_bh = NULL;
2454 struct ocfs2_alloc_context *inode_ac = NULL;
2455
2456 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2457 if (ret < 0) {
2458 mlog_errno(ret);
2459 return ret;
2460 }
2461
2462 /* reserve an inode spot */
2463 ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2464 if (ret < 0) {
2465 if (ret != -ENOSPC)
2466 mlog_errno(ret);
2467 goto out;
2468 }
2469
2470 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2471 &di_blkno);
2472 if (ret) {
2473 mlog_errno(ret);
2474 goto out;
2475 }
2476
2477 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2478 di_blkno, orphan_name, orphan_insert,
2479 false);
2480 if (ret < 0) {
2481 mlog_errno(ret);
2482 goto out;
2483 }
2484
2485 out:
2486 if (ret == 0) {
2487 *ret_orphan_dir = orphan_dir;
2488 *ret_di_blkno = di_blkno;
2489 *ret_inode_ac = inode_ac;
2490 /*
2491 * orphan_name and orphan_insert are already up to
2492 * date via prepare_orphan_dir
2493 */
2494 } else {
2495 /* Unroll reserve_new_inode* */
2496 if (inode_ac)
2497 ocfs2_free_alloc_context(inode_ac);
2498
2499 /* Unroll orphan dir locking */
2500 mutex_unlock(&orphan_dir->i_mutex);
2501 ocfs2_inode_unlock(orphan_dir, 1);
2502 iput(orphan_dir);
2503 }
2504
2505 brelse(orphan_dir_bh);
2506
2507 return ret;
2508 }
2509
2510 int ocfs2_create_inode_in_orphan(struct inode *dir,
2511 int mode,
2512 struct inode **new_inode)
2513 {
2514 int status, did_quota_inode = 0;
2515 struct inode *inode = NULL;
2516 struct inode *orphan_dir = NULL;
2517 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2518 struct ocfs2_dinode *di = NULL;
2519 handle_t *handle = NULL;
2520 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2521 struct buffer_head *parent_di_bh = NULL;
2522 struct buffer_head *new_di_bh = NULL;
2523 struct ocfs2_alloc_context *inode_ac = NULL;
2524 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2525 u64 uninitialized_var(di_blkno), suballoc_loc;
2526 u16 suballoc_bit;
2527
2528 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2529 if (status < 0) {
2530 if (status != -ENOENT)
2531 mlog_errno(status);
2532 return status;
2533 }
2534
2535 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2536 orphan_name, &orphan_dir,
2537 &di_blkno, &orphan_insert, &inode_ac);
2538 if (status < 0) {
2539 if (status != -ENOSPC)
2540 mlog_errno(status);
2541 goto leave;
2542 }
2543
2544 inode = ocfs2_get_init_inode(dir, mode);
2545 if (IS_ERR(inode)) {
2546 status = PTR_ERR(inode);
2547 inode = NULL;
2548 mlog_errno(status);
2549 goto leave;
2550 }
2551
2552 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2553 if (IS_ERR(handle)) {
2554 status = PTR_ERR(handle);
2555 handle = NULL;
2556 mlog_errno(status);
2557 goto leave;
2558 }
2559
2560 status = dquot_alloc_inode(inode);
2561 if (status)
2562 goto leave;
2563 did_quota_inode = 1;
2564
2565 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2566 &suballoc_loc,
2567 &suballoc_bit, di_blkno);
2568 if (status < 0) {
2569 mlog_errno(status);
2570 goto leave;
2571 }
2572
2573 clear_nlink(inode);
2574 /* do the real work now. */
2575 status = __ocfs2_mknod_locked(dir, inode,
2576 0, &new_di_bh, parent_di_bh, handle,
2577 inode_ac, di_blkno, suballoc_loc,
2578 suballoc_bit);
2579 if (status < 0) {
2580 mlog_errno(status);
2581 goto leave;
2582 }
2583
2584 di = (struct ocfs2_dinode *)new_di_bh->b_data;
2585 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2586 &orphan_insert, orphan_dir, false);
2587 if (status < 0) {
2588 mlog_errno(status);
2589 goto leave;
2590 }
2591
2592 /* get open lock so that only nodes can't remove it from orphan dir. */
2593 status = ocfs2_open_lock(inode);
2594 if (status < 0)
2595 mlog_errno(status);
2596
2597 insert_inode_hash(inode);
2598 leave:
2599 if (status < 0 && did_quota_inode)
2600 dquot_free_inode(inode);
2601 if (handle)
2602 ocfs2_commit_trans(osb, handle);
2603
2604 if (orphan_dir) {
2605 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2606 ocfs2_inode_unlock(orphan_dir, 1);
2607 mutex_unlock(&orphan_dir->i_mutex);
2608 iput(orphan_dir);
2609 }
2610
2611 if ((status < 0) && inode) {
2612 clear_nlink(inode);
2613 iput(inode);
2614 }
2615
2616 if (inode_ac)
2617 ocfs2_free_alloc_context(inode_ac);
2618
2619 brelse(new_di_bh);
2620
2621 if (!status)
2622 *new_inode = inode;
2623
2624 ocfs2_free_dir_lookup_result(&orphan_insert);
2625
2626 ocfs2_inode_unlock(dir, 1);
2627 brelse(parent_di_bh);
2628 return status;
2629 }
2630
2631 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
2632 struct inode *inode)
2633 {
2634 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2635 struct inode *orphan_dir_inode = NULL;
2636 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2637 struct buffer_head *di_bh = NULL;
2638 int status = 0;
2639 handle_t *handle = NULL;
2640 struct ocfs2_dinode *di = NULL;
2641
2642 status = ocfs2_inode_lock(inode, &di_bh, 1);
2643 if (status < 0) {
2644 mlog_errno(status);
2645 goto bail;
2646 }
2647
2648 di = (struct ocfs2_dinode *) di_bh->b_data;
2649 /*
2650 * Another append dio crashed?
2651 * If so, manually recover it first.
2652 */
2653 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
2654 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode));
2655 if (status < 0) {
2656 if (status != -ENOSPC)
2657 mlog_errno(status);
2658 goto bail_unlock_inode;
2659 }
2660
2661 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0);
2662 if (status < 0) {
2663 mlog_errno(status);
2664 goto bail_unlock_inode;
2665 }
2666 }
2667
2668 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
2669 OCFS2_I(inode)->ip_blkno,
2670 orphan_name,
2671 &orphan_insert,
2672 true);
2673 if (status < 0) {
2674 mlog_errno(status);
2675 goto bail_unlock_inode;
2676 }
2677
2678 handle = ocfs2_start_trans(osb,
2679 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS);
2680 if (IS_ERR(handle)) {
2681 status = PTR_ERR(handle);
2682 goto bail_unlock_orphan;
2683 }
2684
2685 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
2686 &orphan_insert, orphan_dir_inode, true);
2687 if (status)
2688 mlog_errno(status);
2689
2690 ocfs2_commit_trans(osb, handle);
2691
2692 bail_unlock_orphan:
2693 ocfs2_inode_unlock(orphan_dir_inode, 1);
2694 mutex_unlock(&orphan_dir_inode->i_mutex);
2695 iput(orphan_dir_inode);
2696
2697 ocfs2_free_dir_lookup_result(&orphan_insert);
2698
2699 bail_unlock_inode:
2700 ocfs2_inode_unlock(inode, 1);
2701 brelse(di_bh);
2702
2703 bail:
2704 return status;
2705 }
2706
2707 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
2708 struct inode *inode, struct buffer_head *di_bh,
2709 int update_isize, loff_t end)
2710 {
2711 struct inode *orphan_dir_inode = NULL;
2712 struct buffer_head *orphan_dir_bh = NULL;
2713 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2714 handle_t *handle = NULL;
2715 int status = 0;
2716
2717 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2718 ORPHAN_DIR_SYSTEM_INODE,
2719 le16_to_cpu(di->i_dio_orphaned_slot));
2720 if (!orphan_dir_inode) {
2721 status = -ENOENT;
2722 mlog_errno(status);
2723 goto bail;
2724 }
2725
2726 mutex_lock(&orphan_dir_inode->i_mutex);
2727 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2728 if (status < 0) {
2729 mutex_unlock(&orphan_dir_inode->i_mutex);
2730 iput(orphan_dir_inode);
2731 mlog_errno(status);
2732 goto bail;
2733 }
2734
2735 handle = ocfs2_start_trans(osb,
2736 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS);
2737 if (IS_ERR(handle)) {
2738 status = PTR_ERR(handle);
2739 goto bail_unlock_orphan;
2740 }
2741
2742 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)));
2743
2744 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
2745 inode, orphan_dir_bh, true);
2746 if (status < 0) {
2747 mlog_errno(status);
2748 goto bail_commit;
2749 }
2750
2751 status = ocfs2_journal_access_di(handle,
2752 INODE_CACHE(inode),
2753 di_bh,
2754 OCFS2_JOURNAL_ACCESS_WRITE);
2755 if (status < 0) {
2756 mlog_errno(status);
2757 goto bail_commit;
2758 }
2759
2760 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2761 di->i_dio_orphaned_slot = 0;
2762
2763 if (update_isize) {
2764 status = ocfs2_set_inode_size(handle, inode, di_bh, end);
2765 if (status)
2766 mlog_errno(status);
2767 } else
2768 ocfs2_journal_dirty(handle, di_bh);
2769
2770 bail_commit:
2771 ocfs2_commit_trans(osb, handle);
2772
2773 bail_unlock_orphan:
2774 ocfs2_inode_unlock(orphan_dir_inode, 1);
2775 mutex_unlock(&orphan_dir_inode->i_mutex);
2776 brelse(orphan_dir_bh);
2777 iput(orphan_dir_inode);
2778
2779 bail:
2780 return status;
2781 }
2782
2783 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2784 struct inode *inode,
2785 struct dentry *dentry)
2786 {
2787 int status = 0;
2788 struct buffer_head *parent_di_bh = NULL;
2789 handle_t *handle = NULL;
2790 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2791 struct ocfs2_dinode *dir_di, *di;
2792 struct inode *orphan_dir_inode = NULL;
2793 struct buffer_head *orphan_dir_bh = NULL;
2794 struct buffer_head *di_bh = NULL;
2795 struct ocfs2_dir_lookup_result lookup = { NULL, };
2796
2797 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2798 dentry->d_name.len, dentry->d_name.name,
2799 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2800 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2801
2802 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2803 if (status < 0) {
2804 if (status != -ENOENT)
2805 mlog_errno(status);
2806 return status;
2807 }
2808
2809 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2810 if (!dir_di->i_links_count) {
2811 /* can't make a file in a deleted directory. */
2812 status = -ENOENT;
2813 goto leave;
2814 }
2815
2816 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2817 dentry->d_name.len);
2818 if (status)
2819 goto leave;
2820
2821 /* get a spot inside the dir. */
2822 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2823 dentry->d_name.name,
2824 dentry->d_name.len, &lookup);
2825 if (status < 0) {
2826 mlog_errno(status);
2827 goto leave;
2828 }
2829
2830 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2831 ORPHAN_DIR_SYSTEM_INODE,
2832 osb->slot_num);
2833 if (!orphan_dir_inode) {
2834 status = -ENOENT;
2835 mlog_errno(status);
2836 goto leave;
2837 }
2838
2839 mutex_lock(&orphan_dir_inode->i_mutex);
2840
2841 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2842 if (status < 0) {
2843 mlog_errno(status);
2844 mutex_unlock(&orphan_dir_inode->i_mutex);
2845 iput(orphan_dir_inode);
2846 goto leave;
2847 }
2848
2849 status = ocfs2_read_inode_block(inode, &di_bh);
2850 if (status < 0) {
2851 mlog_errno(status);
2852 goto orphan_unlock;
2853 }
2854
2855 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2856 if (IS_ERR(handle)) {
2857 status = PTR_ERR(handle);
2858 handle = NULL;
2859 mlog_errno(status);
2860 goto orphan_unlock;
2861 }
2862
2863 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2864 di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2865 if (status < 0) {
2866 mlog_errno(status);
2867 goto out_commit;
2868 }
2869
2870 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2871 orphan_dir_bh, false);
2872 if (status < 0) {
2873 mlog_errno(status);
2874 goto out_commit;
2875 }
2876
2877 di = (struct ocfs2_dinode *)di_bh->b_data;
2878 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2879 di->i_orphaned_slot = 0;
2880 set_nlink(inode, 1);
2881 ocfs2_set_links_count(di, inode->i_nlink);
2882 ocfs2_update_inode_fsync_trans(handle, inode, 1);
2883 ocfs2_journal_dirty(handle, di_bh);
2884
2885 status = ocfs2_add_entry(handle, dentry, inode,
2886 OCFS2_I(inode)->ip_blkno, parent_di_bh,
2887 &lookup);
2888 if (status < 0) {
2889 mlog_errno(status);
2890 goto out_commit;
2891 }
2892
2893 status = ocfs2_dentry_attach_lock(dentry, inode,
2894 OCFS2_I(dir)->ip_blkno);
2895 if (status) {
2896 mlog_errno(status);
2897 goto out_commit;
2898 }
2899
2900 d_instantiate(dentry, inode);
2901 status = 0;
2902 out_commit:
2903 ocfs2_commit_trans(osb, handle);
2904 orphan_unlock:
2905 ocfs2_inode_unlock(orphan_dir_inode, 1);
2906 mutex_unlock(&orphan_dir_inode->i_mutex);
2907 iput(orphan_dir_inode);
2908 leave:
2909
2910 ocfs2_inode_unlock(dir, 1);
2911
2912 brelse(di_bh);
2913 brelse(parent_di_bh);
2914 brelse(orphan_dir_bh);
2915
2916 ocfs2_free_dir_lookup_result(&lookup);
2917
2918 if (status)
2919 mlog_errno(status);
2920
2921 return status;
2922 }
2923
2924 const struct inode_operations ocfs2_dir_iops = {
2925 .create = ocfs2_create,
2926 .lookup = ocfs2_lookup,
2927 .link = ocfs2_link,
2928 .unlink = ocfs2_unlink,
2929 .rmdir = ocfs2_unlink,
2930 .symlink = ocfs2_symlink,
2931 .mkdir = ocfs2_mkdir,
2932 .mknod = ocfs2_mknod,
2933 .rename = ocfs2_rename,
2934 .setattr = ocfs2_setattr,
2935 .getattr = ocfs2_getattr,
2936 .permission = ocfs2_permission,
2937 .setxattr = generic_setxattr,
2938 .getxattr = generic_getxattr,
2939 .listxattr = ocfs2_listxattr,
2940 .removexattr = generic_removexattr,
2941 .fiemap = ocfs2_fiemap,
2942 .get_acl = ocfs2_iop_get_acl,
2943 .set_acl = ocfs2_iop_set_acl,
2944 };
Linux kernel - Deliverables
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