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libceph: clear r_req_lru_item in __unregister_linger_request()
[linux/fpc-iii.git] / fs / ocfs2 / namei.c
blobb931e04e33889742a6192255b3bd95d8779203ea
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
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 unsigned int flags)
102 {
103 int status;
104 u64 blkno;
105 struct inode *inode = NULL;
106 struct dentry *ret;
107 struct ocfs2_inode_info *oi;
108
109 trace_ocfs2_lookup(dir, dentry, dentry->d_name.len,
110 dentry->d_name.name,
111 (unsigned long long)OCFS2_I(dir)->ip_blkno, 0);
112
113 if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
114 ret = ERR_PTR(-ENAMETOOLONG);
115 goto bail;
116 }
117
118 status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
119 if (status < 0) {
120 if (status != -ENOENT)
121 mlog_errno(status);
122 ret = ERR_PTR(status);
123 goto bail;
124 }
125
126 status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
127 dentry->d_name.len, &blkno);
128 if (status < 0)
129 goto bail_add;
130
131 inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
132 if (IS_ERR(inode)) {
133 ret = ERR_PTR(-EACCES);
134 goto bail_unlock;
135 }
136
137 oi = OCFS2_I(inode);
138 /* Clear any orphaned state... If we were able to look up the
139 * inode from a directory, it certainly can't be orphaned. We
140 * might have the bad state from a node which intended to
141 * orphan this inode but crashed before it could commit the
142 * unlink. */
143 spin_lock(&oi->ip_lock);
144 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
145 spin_unlock(&oi->ip_lock);
146
147 bail_add:
148 ret = d_splice_alias(inode, dentry);
149
150 if (inode) {
151 /*
152 * If d_splice_alias() finds a DCACHE_DISCONNECTED
153 * dentry, it will d_move() it on top of ourse. The
154 * return value will indicate this however, so in
155 * those cases, we switch them around for the locking
156 * code.
157 *
158 * NOTE: This dentry already has ->d_op set from
159 * ocfs2_get_parent() and ocfs2_get_dentry()
160 */
161 if (!IS_ERR_OR_NULL(ret))
162 dentry = ret;
163
164 status = ocfs2_dentry_attach_lock(dentry, inode,
165 OCFS2_I(dir)->ip_blkno);
166 if (status) {
167 mlog_errno(status);
168 ret = ERR_PTR(status);
169 goto bail_unlock;
170 }
171 } else
172 ocfs2_dentry_attach_gen(dentry);
173
174 bail_unlock:
175 /* Don't drop the cluster lock until *after* the d_add --
176 * unlink on another node will message us to remove that
177 * dentry under this lock so otherwise we can race this with
178 * the downconvert thread and have a stale dentry. */
179 ocfs2_inode_unlock(dir, 0);
180
181 bail:
182
183 trace_ocfs2_lookup_ret(ret);
184
185 return ret;
186 }
187
188 static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode)
189 {
190 struct inode *inode;
191
192 inode = new_inode(dir->i_sb);
193 if (!inode) {
194 mlog(ML_ERROR, "new_inode failed!\n");
195 return NULL;
196 }
197
198 /* populate as many fields early on as possible - many of
199 * these are used by the support functions here and in
200 * callers. */
201 if (S_ISDIR(mode))
202 set_nlink(inode, 2);
203 inode_init_owner(inode, dir, mode);
204 dquot_initialize(inode);
205 return inode;
206 }
207
208 static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb,
209 struct dentry *dentry, struct inode *inode)
210 {
211 struct ocfs2_dentry_lock *dl = dentry->d_fsdata;
212
213 ocfs2_simple_drop_lockres(osb, &dl->dl_lockres);
214 ocfs2_lock_res_free(&dl->dl_lockres);
215 BUG_ON(dl->dl_count != 1);
216 spin_lock(&dentry_attach_lock);
217 dentry->d_fsdata = NULL;
218 spin_unlock(&dentry_attach_lock);
219 kfree(dl);
220 iput(inode);
221 }
222
223 static int ocfs2_mknod(struct inode *dir,
224 struct dentry *dentry,
225 umode_t mode,
226 dev_t dev)
227 {
228 int status = 0;
229 struct buffer_head *parent_fe_bh = NULL;
230 handle_t *handle = NULL;
231 struct ocfs2_super *osb;
232 struct ocfs2_dinode *dirfe;
233 struct buffer_head *new_fe_bh = NULL;
234 struct inode *inode = NULL;
235 struct ocfs2_alloc_context *inode_ac = NULL;
236 struct ocfs2_alloc_context *data_ac = NULL;
237 struct ocfs2_alloc_context *meta_ac = NULL;
238 int want_clusters = 0;
239 int want_meta = 0;
240 int xattr_credits = 0;
241 struct ocfs2_security_xattr_info si = {
242 .enable = 1,
243 };
244 int did_quota_inode = 0;
245 struct ocfs2_dir_lookup_result lookup = { NULL, };
246 sigset_t oldset;
247 int did_block_signals = 0;
248 struct posix_acl *default_acl = NULL, *acl = NULL;
249 struct ocfs2_dentry_lock *dl = NULL;
250
251 trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
252 (unsigned long long)OCFS2_I(dir)->ip_blkno,
253 (unsigned long)dev, mode);
254
255 dquot_initialize(dir);
256
257 /* get our super block */
258 osb = OCFS2_SB(dir->i_sb);
259
260 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
261 if (status < 0) {
262 if (status != -ENOENT)
263 mlog_errno(status);
264 return status;
265 }
266
267 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
268 status = -EMLINK;
269 goto leave;
270 }
271
272 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
273 if (!ocfs2_read_links_count(dirfe)) {
274 /* can't make a file in a deleted directory. */
275 status = -ENOENT;
276 goto leave;
277 }
278
279 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
280 dentry->d_name.len);
281 if (status)
282 goto leave;
283
284 /* get a spot inside the dir. */
285 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
286 dentry->d_name.name,
287 dentry->d_name.len, &lookup);
288 if (status < 0) {
289 mlog_errno(status);
290 goto leave;
291 }
292
293 /* reserve an inode spot */
294 status = ocfs2_reserve_new_inode(osb, &inode_ac);
295 if (status < 0) {
296 if (status != -ENOSPC)
297 mlog_errno(status);
298 goto leave;
299 }
300
301 inode = ocfs2_get_init_inode(dir, mode);
302 if (!inode) {
303 status = -ENOMEM;
304 mlog_errno(status);
305 goto leave;
306 }
307
308 /* get security xattr */
309 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
310 if (status) {
311 if (status == -EOPNOTSUPP)
312 si.enable = 0;
313 else {
314 mlog_errno(status);
315 goto leave;
316 }
317 }
318
319 /* calculate meta data/clusters for setting security and acl xattr */
320 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
321 &si, &want_clusters,
322 &xattr_credits, &want_meta);
323 if (status < 0) {
324 mlog_errno(status);
325 goto leave;
326 }
327
328 /* Reserve a cluster if creating an extent based directory. */
329 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
330 want_clusters += 1;
331
332 /* Dir indexing requires extra space as well */
333 if (ocfs2_supports_indexed_dirs(osb))
334 want_meta++;
335 }
336
337 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
338 if (status < 0) {
339 if (status != -ENOSPC)
340 mlog_errno(status);
341 goto leave;
342 }
343
344 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
345 if (status < 0) {
346 if (status != -ENOSPC)
347 mlog_errno(status);
348 goto leave;
349 }
350
351 status = posix_acl_create(dir, &mode, &default_acl, &acl);
352 if (status) {
353 mlog_errno(status);
354 goto leave;
355 }
356
357 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
358 S_ISDIR(mode),
359 xattr_credits));
360 if (IS_ERR(handle)) {
361 status = PTR_ERR(handle);
362 handle = NULL;
363 mlog_errno(status);
364 goto leave;
365 }
366
367 /* Starting to change things, restart is no longer possible. */
368 ocfs2_block_signals(&oldset);
369 did_block_signals = 1;
370
371 status = dquot_alloc_inode(inode);
372 if (status)
373 goto leave;
374 did_quota_inode = 1;
375
376 /* do the real work now. */
377 status = ocfs2_mknod_locked(osb, dir, inode, dev,
378 &new_fe_bh, parent_fe_bh, handle,
379 inode_ac);
380 if (status < 0) {
381 mlog_errno(status);
382 goto leave;
383 }
384
385 if (S_ISDIR(mode)) {
386 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
387 new_fe_bh, data_ac, meta_ac);
388 if (status < 0) {
389 mlog_errno(status);
390 goto leave;
391 }
392
393 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
394 parent_fe_bh,
395 OCFS2_JOURNAL_ACCESS_WRITE);
396 if (status < 0) {
397 mlog_errno(status);
398 goto leave;
399 }
400 ocfs2_add_links_count(dirfe, 1);
401 ocfs2_journal_dirty(handle, parent_fe_bh);
402 inc_nlink(dir);
403 }
404
405 if (default_acl) {
406 status = ocfs2_set_acl(handle, inode, new_fe_bh,
407 ACL_TYPE_DEFAULT, default_acl,
408 meta_ac, data_ac);
409 }
410 if (!status && acl) {
411 status = ocfs2_set_acl(handle, inode, new_fe_bh,
412 ACL_TYPE_ACCESS, acl,
413 meta_ac, data_ac);
414 }
415
416 if (status < 0) {
417 mlog_errno(status);
418 goto leave;
419 }
420
421 if (si.enable) {
422 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
423 meta_ac, data_ac);
424 if (status < 0) {
425 mlog_errno(status);
426 goto leave;
427 }
428 }
429
430 /*
431 * Do this before adding the entry to the directory. We add
432 * also set d_op after success so that ->d_iput() will cleanup
433 * the dentry lock even if ocfs2_add_entry() fails below.
434 */
435 status = ocfs2_dentry_attach_lock(dentry, inode,
436 OCFS2_I(dir)->ip_blkno);
437 if (status) {
438 mlog_errno(status);
439 goto leave;
440 }
441
442 dl = dentry->d_fsdata;
443
444 status = ocfs2_add_entry(handle, dentry, inode,
445 OCFS2_I(inode)->ip_blkno, parent_fe_bh,
446 &lookup);
447 if (status < 0) {
448 mlog_errno(status);
449 goto leave;
450 }
451
452 insert_inode_hash(inode);
453 d_instantiate(dentry, inode);
454 status = 0;
455 leave:
456 if (default_acl)
457 posix_acl_release(default_acl);
458 if (acl)
459 posix_acl_release(acl);
460 if (status < 0 && did_quota_inode)
461 dquot_free_inode(inode);
462 if (handle)
463 ocfs2_commit_trans(osb, handle);
464
465 ocfs2_inode_unlock(dir, 1);
466 if (did_block_signals)
467 ocfs2_unblock_signals(&oldset);
468
469 brelse(new_fe_bh);
470 brelse(parent_fe_bh);
471 kfree(si.value);
472
473 ocfs2_free_dir_lookup_result(&lookup);
474
475 if (inode_ac)
476 ocfs2_free_alloc_context(inode_ac);
477
478 if (data_ac)
479 ocfs2_free_alloc_context(data_ac);
480
481 if (meta_ac)
482 ocfs2_free_alloc_context(meta_ac);
483
484 /*
485 * We should call iput after the i_mutex of the bitmap been
486 * unlocked in ocfs2_free_alloc_context, or the
487 * ocfs2_delete_inode will mutex_lock again.
488 */
489 if ((status < 0) && inode) {
490 if (dl)
491 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
492
493 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
494 clear_nlink(inode);
495 iput(inode);
496 }
497
498 if (status)
499 mlog_errno(status);
500
501 return status;
502 }
503
504 static int __ocfs2_mknod_locked(struct inode *dir,
505 struct inode *inode,
506 dev_t dev,
507 struct buffer_head **new_fe_bh,
508 struct buffer_head *parent_fe_bh,
509 handle_t *handle,
510 struct ocfs2_alloc_context *inode_ac,
511 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
512 {
513 int status = 0;
514 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
515 struct ocfs2_dinode *fe = NULL;
516 struct ocfs2_extent_list *fel;
517 u16 feat;
518 struct ocfs2_inode_info *oi = OCFS2_I(inode);
519
520 *new_fe_bh = NULL;
521
522 /* populate as many fields early on as possible - many of
523 * these are used by the support functions here and in
524 * callers. */
525 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
526 OCFS2_I(inode)->ip_blkno = fe_blkno;
527 spin_lock(&osb->osb_lock);
528 inode->i_generation = osb->s_next_generation++;
529 spin_unlock(&osb->osb_lock);
530
531 *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
532 if (!*new_fe_bh) {
533 status = -ENOMEM;
534 mlog_errno(status);
535 goto leave;
536 }
537 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
538
539 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
540 *new_fe_bh,
541 OCFS2_JOURNAL_ACCESS_CREATE);
542 if (status < 0) {
543 mlog_errno(status);
544 goto leave;
545 }
546
547 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
548 memset(fe, 0, osb->sb->s_blocksize);
549
550 fe->i_generation = cpu_to_le32(inode->i_generation);
551 fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
552 fe->i_blkno = cpu_to_le64(fe_blkno);
553 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
554 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
555 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
556 fe->i_uid = cpu_to_le32(i_uid_read(inode));
557 fe->i_gid = cpu_to_le32(i_gid_read(inode));
558 fe->i_mode = cpu_to_le16(inode->i_mode);
559 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
560 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
561
562 ocfs2_set_links_count(fe, inode->i_nlink);
563
564 fe->i_last_eb_blk = 0;
565 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
566 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
567 fe->i_atime = fe->i_ctime = fe->i_mtime =
568 cpu_to_le64(CURRENT_TIME.tv_sec);
569 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
570 cpu_to_le32(CURRENT_TIME.tv_nsec);
571 fe->i_dtime = 0;
572
573 /*
574 * If supported, directories start with inline data. If inline
575 * isn't supported, but indexing is, we start them as indexed.
576 */
577 feat = le16_to_cpu(fe->i_dyn_features);
578 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
579 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
580
581 fe->id2.i_data.id_count = cpu_to_le16(
582 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
583 } else {
584 fel = &fe->id2.i_list;
585 fel->l_tree_depth = 0;
586 fel->l_next_free_rec = 0;
587 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
588 }
589
590 ocfs2_journal_dirty(handle, *new_fe_bh);
591
592 ocfs2_populate_inode(inode, fe, 1);
593 ocfs2_ci_set_new(osb, INODE_CACHE(inode));
594 if (!ocfs2_mount_local(osb)) {
595 status = ocfs2_create_new_inode_locks(inode);
596 if (status < 0)
597 mlog_errno(status);
598 }
599
600 oi->i_sync_tid = handle->h_transaction->t_tid;
601 oi->i_datasync_tid = handle->h_transaction->t_tid;
602
603 leave:
604 if (status < 0) {
605 if (*new_fe_bh) {
606 brelse(*new_fe_bh);
607 *new_fe_bh = NULL;
608 }
609 }
610
611 if (status)
612 mlog_errno(status);
613 return status;
614 }
615
616 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
617 struct inode *dir,
618 struct inode *inode,
619 dev_t dev,
620 struct buffer_head **new_fe_bh,
621 struct buffer_head *parent_fe_bh,
622 handle_t *handle,
623 struct ocfs2_alloc_context *inode_ac)
624 {
625 int status = 0;
626 u64 suballoc_loc, fe_blkno = 0;
627 u16 suballoc_bit;
628
629 *new_fe_bh = NULL;
630
631 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
632 inode_ac, &suballoc_loc,
633 &suballoc_bit, &fe_blkno);
634 if (status < 0) {
635 mlog_errno(status);
636 return status;
637 }
638
639 return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
640 parent_fe_bh, handle, inode_ac,
641 fe_blkno, suballoc_loc, suballoc_bit);
642 }
643
644 static int ocfs2_mkdir(struct inode *dir,
645 struct dentry *dentry,
646 umode_t mode)
647 {
648 int ret;
649
650 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
651 OCFS2_I(dir)->ip_blkno, mode);
652 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
653 if (ret)
654 mlog_errno(ret);
655
656 return ret;
657 }
658
659 static int ocfs2_create(struct inode *dir,
660 struct dentry *dentry,
661 umode_t mode,
662 bool excl)
663 {
664 int ret;
665
666 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
667 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
668 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
669 if (ret)
670 mlog_errno(ret);
671
672 return ret;
673 }
674
675 static int ocfs2_link(struct dentry *old_dentry,
676 struct inode *dir,
677 struct dentry *dentry)
678 {
679 handle_t *handle;
680 struct inode *inode = old_dentry->d_inode;
681 int err;
682 struct buffer_head *fe_bh = NULL;
683 struct buffer_head *parent_fe_bh = NULL;
684 struct ocfs2_dinode *fe = NULL;
685 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
686 struct ocfs2_dir_lookup_result lookup = { NULL, };
687 sigset_t oldset;
688 u64 old_de_ino;
689
690 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
691 old_dentry->d_name.len, old_dentry->d_name.name,
692 dentry->d_name.len, dentry->d_name.name);
693
694 if (S_ISDIR(inode->i_mode))
695 return -EPERM;
696
697 dquot_initialize(dir);
698
699 err = ocfs2_inode_lock_nested(dir, &parent_fe_bh, 1, OI_LS_PARENT);
700 if (err < 0) {
701 if (err != -ENOENT)
702 mlog_errno(err);
703 return err;
704 }
705
706 if (!dir->i_nlink) {
707 err = -ENOENT;
708 goto out;
709 }
710
711 err = ocfs2_lookup_ino_from_name(dir, old_dentry->d_name.name,
712 old_dentry->d_name.len, &old_de_ino);
713 if (err) {
714 err = -ENOENT;
715 goto out;
716 }
717
718 /*
719 * Check whether another node removed the source inode while we
720 * were in the vfs.
721 */
722 if (old_de_ino != OCFS2_I(inode)->ip_blkno) {
723 err = -ENOENT;
724 goto out;
725 }
726
727 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
728 dentry->d_name.len);
729 if (err)
730 goto out;
731
732 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
733 dentry->d_name.name,
734 dentry->d_name.len, &lookup);
735 if (err < 0) {
736 mlog_errno(err);
737 goto out;
738 }
739
740 err = ocfs2_inode_lock(inode, &fe_bh, 1);
741 if (err < 0) {
742 if (err != -ENOENT)
743 mlog_errno(err);
744 goto out;
745 }
746
747 fe = (struct ocfs2_dinode *) fe_bh->b_data;
748 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
749 err = -EMLINK;
750 goto out_unlock_inode;
751 }
752
753 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
754 if (IS_ERR(handle)) {
755 err = PTR_ERR(handle);
756 handle = NULL;
757 mlog_errno(err);
758 goto out_unlock_inode;
759 }
760
761 /* Starting to change things, restart is no longer possible. */
762 ocfs2_block_signals(&oldset);
763
764 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
765 OCFS2_JOURNAL_ACCESS_WRITE);
766 if (err < 0) {
767 mlog_errno(err);
768 goto out_commit;
769 }
770
771 inc_nlink(inode);
772 inode->i_ctime = CURRENT_TIME;
773 ocfs2_set_links_count(fe, inode->i_nlink);
774 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
775 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
776 ocfs2_journal_dirty(handle, fe_bh);
777
778 err = ocfs2_add_entry(handle, dentry, inode,
779 OCFS2_I(inode)->ip_blkno,
780 parent_fe_bh, &lookup);
781 if (err) {
782 ocfs2_add_links_count(fe, -1);
783 drop_nlink(inode);
784 mlog_errno(err);
785 goto out_commit;
786 }
787
788 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
789 if (err) {
790 mlog_errno(err);
791 goto out_commit;
792 }
793
794 ihold(inode);
795 d_instantiate(dentry, inode);
796
797 out_commit:
798 ocfs2_commit_trans(osb, handle);
799 ocfs2_unblock_signals(&oldset);
800 out_unlock_inode:
801 ocfs2_inode_unlock(inode, 1);
802
803 out:
804 ocfs2_inode_unlock(dir, 1);
805
806 brelse(fe_bh);
807 brelse(parent_fe_bh);
808
809 ocfs2_free_dir_lookup_result(&lookup);
810
811 if (err)
812 mlog_errno(err);
813
814 return err;
815 }
816
817 /*
818 * Takes and drops an exclusive lock on the given dentry. This will
819 * force other nodes to drop it.
820 */
821 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
822 {
823 int ret;
824
825 ret = ocfs2_dentry_lock(dentry, 1);
826 if (ret)
827 mlog_errno(ret);
828 else
829 ocfs2_dentry_unlock(dentry, 1);
830
831 return ret;
832 }
833
834 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
835 {
836 if (S_ISDIR(inode->i_mode)) {
837 if (inode->i_nlink == 2)
838 return 1;
839 return 0;
840 }
841
842 if (inode->i_nlink == 1)
843 return 1;
844 return 0;
845 }
846
847 static int ocfs2_unlink(struct inode *dir,
848 struct dentry *dentry)
849 {
850 int status;
851 int child_locked = 0;
852 bool is_unlinkable = false;
853 struct inode *inode = dentry->d_inode;
854 struct inode *orphan_dir = NULL;
855 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
856 u64 blkno;
857 struct ocfs2_dinode *fe = NULL;
858 struct buffer_head *fe_bh = NULL;
859 struct buffer_head *parent_node_bh = NULL;
860 handle_t *handle = NULL;
861 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
862 struct ocfs2_dir_lookup_result lookup = { NULL, };
863 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
864
865 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
866 dentry->d_name.name,
867 (unsigned long long)OCFS2_I(dir)->ip_blkno,
868 (unsigned long long)OCFS2_I(inode)->ip_blkno);
869
870 dquot_initialize(dir);
871
872 BUG_ON(dentry->d_parent->d_inode != dir);
873
874 if (inode == osb->root_inode)
875 return -EPERM;
876
877 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
878 OI_LS_PARENT);
879 if (status < 0) {
880 if (status != -ENOENT)
881 mlog_errno(status);
882 return status;
883 }
884
885 status = ocfs2_find_files_on_disk(dentry->d_name.name,
886 dentry->d_name.len, &blkno, dir,
887 &lookup);
888 if (status < 0) {
889 if (status != -ENOENT)
890 mlog_errno(status);
891 goto leave;
892 }
893
894 if (OCFS2_I(inode)->ip_blkno != blkno) {
895 status = -ENOENT;
896
897 trace_ocfs2_unlink_noent(
898 (unsigned long long)OCFS2_I(inode)->ip_blkno,
899 (unsigned long long)blkno,
900 OCFS2_I(inode)->ip_flags);
901 goto leave;
902 }
903
904 status = ocfs2_inode_lock(inode, &fe_bh, 1);
905 if (status < 0) {
906 if (status != -ENOENT)
907 mlog_errno(status);
908 goto leave;
909 }
910 child_locked = 1;
911
912 if (S_ISDIR(inode->i_mode)) {
913 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
914 status = -ENOTEMPTY;
915 goto leave;
916 }
917 }
918
919 status = ocfs2_remote_dentry_delete(dentry);
920 if (status < 0) {
921 /* This remote delete should succeed under all normal
922 * circumstances. */
923 mlog_errno(status);
924 goto leave;
925 }
926
927 if (ocfs2_inode_is_unlinkable(inode)) {
928 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
929 OCFS2_I(inode)->ip_blkno,
930 orphan_name, &orphan_insert);
931 if (status < 0) {
932 mlog_errno(status);
933 goto leave;
934 }
935 is_unlinkable = true;
936 }
937
938 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
939 if (IS_ERR(handle)) {
940 status = PTR_ERR(handle);
941 handle = NULL;
942 mlog_errno(status);
943 goto leave;
944 }
945
946 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
947 OCFS2_JOURNAL_ACCESS_WRITE);
948 if (status < 0) {
949 mlog_errno(status);
950 goto leave;
951 }
952
953 fe = (struct ocfs2_dinode *) fe_bh->b_data;
954
955 /* delete the name from the parent dir */
956 status = ocfs2_delete_entry(handle, dir, &lookup);
957 if (status < 0) {
958 mlog_errno(status);
959 goto leave;
960 }
961
962 if (S_ISDIR(inode->i_mode))
963 drop_nlink(inode);
964 drop_nlink(inode);
965 ocfs2_set_links_count(fe, inode->i_nlink);
966 ocfs2_journal_dirty(handle, fe_bh);
967
968 dir->i_ctime = dir->i_mtime = CURRENT_TIME;
969 if (S_ISDIR(inode->i_mode))
970 drop_nlink(dir);
971
972 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
973 if (status < 0) {
974 mlog_errno(status);
975 if (S_ISDIR(inode->i_mode))
976 inc_nlink(dir);
977 goto leave;
978 }
979
980 if (is_unlinkable) {
981 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
982 orphan_name, &orphan_insert, orphan_dir);
983 if (status < 0)
984 mlog_errno(status);
985 }
986
987 leave:
988 if (handle)
989 ocfs2_commit_trans(osb, handle);
990
991 if (child_locked)
992 ocfs2_inode_unlock(inode, 1);
993
994 ocfs2_inode_unlock(dir, 1);
995
996 if (orphan_dir) {
997 /* This was locked for us in ocfs2_prepare_orphan_dir() */
998 ocfs2_inode_unlock(orphan_dir, 1);
999 mutex_unlock(&orphan_dir->i_mutex);
1000 iput(orphan_dir);
1001 }
1002
1003 brelse(fe_bh);
1004 brelse(parent_node_bh);
1005
1006 ocfs2_free_dir_lookup_result(&orphan_insert);
1007 ocfs2_free_dir_lookup_result(&lookup);
1008
1009 if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
1010 mlog_errno(status);
1011
1012 return status;
1013 }
1014
1015 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb,
1016 u64 src_inode_no, u64 dest_inode_no)
1017 {
1018 int ret = 0, i = 0;
1019 u64 parent_inode_no = 0;
1020 u64 child_inode_no = src_inode_no;
1021 struct inode *child_inode;
1022
1023 #define MAX_LOOKUP_TIMES 32
1024 while (1) {
1025 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0);
1026 if (IS_ERR(child_inode)) {
1027 ret = PTR_ERR(child_inode);
1028 break;
1029 }
1030
1031 ret = ocfs2_inode_lock(child_inode, NULL, 0);
1032 if (ret < 0) {
1033 iput(child_inode);
1034 if (ret != -ENOENT)
1035 mlog_errno(ret);
1036 break;
1037 }
1038
1039 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2,
1040 &parent_inode_no);
1041 ocfs2_inode_unlock(child_inode, 0);
1042 iput(child_inode);
1043 if (ret < 0) {
1044 ret = -ENOENT;
1045 break;
1046 }
1047
1048 if (parent_inode_no == dest_inode_no) {
1049 ret = 1;
1050 break;
1051 }
1052
1053 if (parent_inode_no == osb->root_inode->i_ino) {
1054 ret = 0;
1055 break;
1056 }
1057
1058 child_inode_no = parent_inode_no;
1059
1060 if (++i >= MAX_LOOKUP_TIMES) {
1061 mlog(ML_NOTICE, "max lookup times reached, filesystem "
1062 "may have nested directories, "
1063 "src inode: %llu, dest inode: %llu.\n",
1064 (unsigned long long)src_inode_no,
1065 (unsigned long long)dest_inode_no);
1066 ret = 0;
1067 break;
1068 }
1069 }
1070
1071 return ret;
1072 }
1073
1074 /*
1075 * The only place this should be used is rename!
1076 * if they have the same id, then the 1st one is the only one locked.
1077 */
1078 static int ocfs2_double_lock(struct ocfs2_super *osb,
1079 struct buffer_head **bh1,
1080 struct inode *inode1,
1081 struct buffer_head **bh2,
1082 struct inode *inode2)
1083 {
1084 int status;
1085 int inode1_is_ancestor, inode2_is_ancestor;
1086 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
1087 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
1088 struct buffer_head **tmpbh;
1089 struct inode *tmpinode;
1090
1091 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
1092 (unsigned long long)oi2->ip_blkno);
1093
1094 if (*bh1)
1095 *bh1 = NULL;
1096 if (*bh2)
1097 *bh2 = NULL;
1098
1099 /* we always want to lock the one with the lower lockid first.
1100 * and if they are nested, we lock ancestor first */
1101 if (oi1->ip_blkno != oi2->ip_blkno) {
1102 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno,
1103 oi1->ip_blkno);
1104 if (inode1_is_ancestor < 0) {
1105 status = inode1_is_ancestor;
1106 goto bail;
1107 }
1108
1109 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno,
1110 oi2->ip_blkno);
1111 if (inode2_is_ancestor < 0) {
1112 status = inode2_is_ancestor;
1113 goto bail;
1114 }
1115
1116 if ((inode1_is_ancestor == 1) ||
1117 (oi1->ip_blkno < oi2->ip_blkno &&
1118 inode2_is_ancestor == 0)) {
1119 /* switch id1 and id2 around */
1120 tmpbh = bh2;
1121 bh2 = bh1;
1122 bh1 = tmpbh;
1123
1124 tmpinode = inode2;
1125 inode2 = inode1;
1126 inode1 = tmpinode;
1127 }
1128 /* lock id2 */
1129 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1130 OI_LS_RENAME1);
1131 if (status < 0) {
1132 if (status != -ENOENT)
1133 mlog_errno(status);
1134 goto bail;
1135 }
1136 }
1137
1138 /* lock id1 */
1139 status = ocfs2_inode_lock_nested(inode1, bh1, 1, OI_LS_RENAME2);
1140 if (status < 0) {
1141 /*
1142 * An error return must mean that no cluster locks
1143 * were held on function exit.
1144 */
1145 if (oi1->ip_blkno != oi2->ip_blkno) {
1146 ocfs2_inode_unlock(inode2, 1);
1147 brelse(*bh2);
1148 *bh2 = NULL;
1149 }
1150
1151 if (status != -ENOENT)
1152 mlog_errno(status);
1153 }
1154
1155 trace_ocfs2_double_lock_end(
1156 (unsigned long long)OCFS2_I(inode1)->ip_blkno,
1157 (unsigned long long)OCFS2_I(inode2)->ip_blkno);
1158
1159 bail:
1160 if (status)
1161 mlog_errno(status);
1162 return status;
1163 }
1164
1165 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1166 {
1167 ocfs2_inode_unlock(inode1, 1);
1168
1169 if (inode1 != inode2)
1170 ocfs2_inode_unlock(inode2, 1);
1171 }
1172
1173 static int ocfs2_rename(struct inode *old_dir,
1174 struct dentry *old_dentry,
1175 struct inode *new_dir,
1176 struct dentry *new_dentry)
1177 {
1178 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1179 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1180 struct inode *old_inode = old_dentry->d_inode;
1181 struct inode *new_inode = new_dentry->d_inode;
1182 struct inode *orphan_dir = NULL;
1183 struct ocfs2_dinode *newfe = NULL;
1184 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1185 struct buffer_head *newfe_bh = NULL;
1186 struct buffer_head *old_inode_bh = NULL;
1187 struct ocfs2_super *osb = NULL;
1188 u64 newfe_blkno, old_de_ino;
1189 handle_t *handle = NULL;
1190 struct buffer_head *old_dir_bh = NULL;
1191 struct buffer_head *new_dir_bh = NULL;
1192 u32 old_dir_nlink = old_dir->i_nlink;
1193 struct ocfs2_dinode *old_di;
1194 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1195 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1196 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1197 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1198 struct ocfs2_dir_lookup_result target_insert = { NULL, };
1199 bool should_add_orphan = false;
1200
1201 /* At some point it might be nice to break this function up a
1202 * bit. */
1203
1204 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1205 old_dentry->d_name.len, old_dentry->d_name.name,
1206 new_dentry->d_name.len, new_dentry->d_name.name);
1207
1208 dquot_initialize(old_dir);
1209 dquot_initialize(new_dir);
1210
1211 osb = OCFS2_SB(old_dir->i_sb);
1212
1213 if (new_inode) {
1214 if (!igrab(new_inode))
1215 BUG();
1216 }
1217
1218 /* Assume a directory hierarchy thusly:
1219 * a/b/c
1220 * a/d
1221 * a,b,c, and d are all directories.
1222 *
1223 * from cwd of 'a' on both nodes:
1224 * node1: mv b/c d
1225 * node2: mv d b/c
1226 *
1227 * And that's why, just like the VFS, we need a file system
1228 * rename lock. */
1229 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1230 status = ocfs2_rename_lock(osb);
1231 if (status < 0) {
1232 mlog_errno(status);
1233 goto bail;
1234 }
1235 rename_lock = 1;
1236
1237 /* here we cannot guarantee the inodes haven't just been
1238 * changed, so check if they are nested again */
1239 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino,
1240 old_inode->i_ino);
1241 if (status < 0) {
1242 mlog_errno(status);
1243 goto bail;
1244 } else if (status == 1) {
1245 status = -EPERM;
1246 trace_ocfs2_rename_not_permitted(
1247 (unsigned long long)old_inode->i_ino,
1248 (unsigned long long)new_dir->i_ino);
1249 goto bail;
1250 }
1251 }
1252
1253 /* if old and new are the same, this'll just do one lock. */
1254 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1255 &new_dir_bh, new_dir);
1256 if (status < 0) {
1257 mlog_errno(status);
1258 goto bail;
1259 }
1260 parents_locked = 1;
1261
1262 /* make sure both dirs have bhs
1263 * get an extra ref on old_dir_bh if old==new */
1264 if (!new_dir_bh) {
1265 if (old_dir_bh) {
1266 new_dir_bh = old_dir_bh;
1267 get_bh(new_dir_bh);
1268 } else {
1269 mlog(ML_ERROR, "no old_dir_bh!\n");
1270 status = -EIO;
1271 goto bail;
1272 }
1273 }
1274
1275 /*
1276 * Aside from allowing a meta data update, the locking here
1277 * also ensures that the downconvert thread on other nodes
1278 * won't have to concurrently downconvert the inode and the
1279 * dentry locks.
1280 */
1281 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1282 OI_LS_PARENT);
1283 if (status < 0) {
1284 if (status != -ENOENT)
1285 mlog_errno(status);
1286 goto bail;
1287 }
1288 old_child_locked = 1;
1289
1290 status = ocfs2_remote_dentry_delete(old_dentry);
1291 if (status < 0) {
1292 mlog_errno(status);
1293 goto bail;
1294 }
1295
1296 if (S_ISDIR(old_inode->i_mode)) {
1297 u64 old_inode_parent;
1298
1299 update_dot_dot = 1;
1300 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1301 old_inode,
1302 &old_inode_dot_dot_res);
1303 if (status) {
1304 status = -EIO;
1305 goto bail;
1306 }
1307
1308 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1309 status = -EIO;
1310 goto bail;
1311 }
1312
1313 if (!new_inode && new_dir != old_dir &&
1314 new_dir->i_nlink >= ocfs2_link_max(osb)) {
1315 status = -EMLINK;
1316 goto bail;
1317 }
1318 }
1319
1320 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1321 old_dentry->d_name.len,
1322 &old_de_ino);
1323 if (status) {
1324 status = -ENOENT;
1325 goto bail;
1326 }
1327
1328 /*
1329 * Check for inode number is _not_ due to possible IO errors.
1330 * We might rmdir the source, keep it as pwd of some process
1331 * and merrily kill the link to whatever was created under the
1332 * same name. Goodbye sticky bit ;-<
1333 */
1334 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1335 status = -ENOENT;
1336 goto bail;
1337 }
1338
1339 /* check if the target already exists (in which case we need
1340 * to delete it */
1341 status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1342 new_dentry->d_name.len,
1343 &newfe_blkno, new_dir,
1344 &target_lookup_res);
1345 /* The only error we allow here is -ENOENT because the new
1346 * file not existing is perfectly valid. */
1347 if ((status < 0) && (status != -ENOENT)) {
1348 /* If we cannot find the file specified we should just */
1349 /* return the error... */
1350 mlog_errno(status);
1351 goto bail;
1352 }
1353 if (status == 0)
1354 target_exists = 1;
1355
1356 if (!target_exists && new_inode) {
1357 /*
1358 * Target was unlinked by another node while we were
1359 * waiting to get to ocfs2_rename(). There isn't
1360 * anything we can do here to help the situation, so
1361 * bubble up the appropriate error.
1362 */
1363 status = -ENOENT;
1364 goto bail;
1365 }
1366
1367 /* In case we need to overwrite an existing file, we blow it
1368 * away first */
1369 if (target_exists) {
1370 /* VFS didn't think there existed an inode here, but
1371 * someone else in the cluster must have raced our
1372 * rename to create one. Today we error cleanly, in
1373 * the future we should consider calling iget to build
1374 * a new struct inode for this entry. */
1375 if (!new_inode) {
1376 status = -EACCES;
1377
1378 trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1379 new_dentry->d_name.name);
1380 goto bail;
1381 }
1382
1383 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1384 status = -EACCES;
1385
1386 trace_ocfs2_rename_disagree(
1387 (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1388 (unsigned long long)newfe_blkno,
1389 OCFS2_I(new_inode)->ip_flags);
1390 goto bail;
1391 }
1392
1393 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1394 if (status < 0) {
1395 if (status != -ENOENT)
1396 mlog_errno(status);
1397 goto bail;
1398 }
1399 new_child_locked = 1;
1400
1401 status = ocfs2_remote_dentry_delete(new_dentry);
1402 if (status < 0) {
1403 mlog_errno(status);
1404 goto bail;
1405 }
1406
1407 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1408
1409 trace_ocfs2_rename_over_existing(
1410 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1411 (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1412
1413 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1414 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1415 OCFS2_I(new_inode)->ip_blkno,
1416 orphan_name, &orphan_insert);
1417 if (status < 0) {
1418 mlog_errno(status);
1419 goto bail;
1420 }
1421 should_add_orphan = true;
1422 }
1423 } else {
1424 BUG_ON(new_dentry->d_parent->d_inode != new_dir);
1425
1426 status = ocfs2_check_dir_for_entry(new_dir,
1427 new_dentry->d_name.name,
1428 new_dentry->d_name.len);
1429 if (status)
1430 goto bail;
1431
1432 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1433 new_dentry->d_name.name,
1434 new_dentry->d_name.len,
1435 &target_insert);
1436 if (status < 0) {
1437 mlog_errno(status);
1438 goto bail;
1439 }
1440 }
1441
1442 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1443 if (IS_ERR(handle)) {
1444 status = PTR_ERR(handle);
1445 handle = NULL;
1446 mlog_errno(status);
1447 goto bail;
1448 }
1449
1450 if (target_exists) {
1451 if (S_ISDIR(new_inode->i_mode)) {
1452 if (new_inode->i_nlink != 2 ||
1453 !ocfs2_empty_dir(new_inode)) {
1454 status = -ENOTEMPTY;
1455 goto bail;
1456 }
1457 }
1458 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1459 newfe_bh,
1460 OCFS2_JOURNAL_ACCESS_WRITE);
1461 if (status < 0) {
1462 mlog_errno(status);
1463 goto bail;
1464 }
1465
1466 /* change the dirent to point to the correct inode */
1467 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1468 old_inode);
1469 if (status < 0) {
1470 mlog_errno(status);
1471 goto bail;
1472 }
1473 new_dir->i_version++;
1474
1475 if (S_ISDIR(new_inode->i_mode))
1476 ocfs2_set_links_count(newfe, 0);
1477 else
1478 ocfs2_add_links_count(newfe, -1);
1479 ocfs2_journal_dirty(handle, newfe_bh);
1480 if (should_add_orphan) {
1481 status = ocfs2_orphan_add(osb, handle, new_inode,
1482 newfe_bh, orphan_name,
1483 &orphan_insert, orphan_dir);
1484 if (status < 0) {
1485 mlog_errno(status);
1486 goto bail;
1487 }
1488 }
1489 } else {
1490 /* if the name was not found in new_dir, add it now */
1491 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1492 OCFS2_I(old_inode)->ip_blkno,
1493 new_dir_bh, &target_insert);
1494 }
1495
1496 old_inode->i_ctime = CURRENT_TIME;
1497 mark_inode_dirty(old_inode);
1498
1499 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1500 old_inode_bh,
1501 OCFS2_JOURNAL_ACCESS_WRITE);
1502 if (status >= 0) {
1503 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1504
1505 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1506 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1507 ocfs2_journal_dirty(handle, old_inode_bh);
1508 } else
1509 mlog_errno(status);
1510
1511 /*
1512 * Now that the name has been added to new_dir, remove the old name.
1513 *
1514 * We don't keep any directory entry context around until now
1515 * because the insert might have changed the type of directory
1516 * we're dealing with.
1517 */
1518 status = ocfs2_find_entry(old_dentry->d_name.name,
1519 old_dentry->d_name.len, old_dir,
1520 &old_entry_lookup);
1521 if (status)
1522 goto bail;
1523
1524 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1525 if (status < 0) {
1526 mlog_errno(status);
1527 goto bail;
1528 }
1529
1530 if (new_inode) {
1531 drop_nlink(new_inode);
1532 new_inode->i_ctime = CURRENT_TIME;
1533 }
1534 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1535
1536 if (update_dot_dot) {
1537 status = ocfs2_update_entry(old_inode, handle,
1538 &old_inode_dot_dot_res, new_dir);
1539 drop_nlink(old_dir);
1540 if (new_inode) {
1541 drop_nlink(new_inode);
1542 } else {
1543 inc_nlink(new_dir);
1544 mark_inode_dirty(new_dir);
1545 }
1546 }
1547 mark_inode_dirty(old_dir);
1548 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1549 if (new_inode) {
1550 mark_inode_dirty(new_inode);
1551 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1552 }
1553
1554 if (old_dir != new_dir) {
1555 /* Keep the same times on both directories.*/
1556 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1557
1558 /*
1559 * This will also pick up the i_nlink change from the
1560 * block above.
1561 */
1562 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1563 }
1564
1565 if (old_dir_nlink != old_dir->i_nlink) {
1566 if (!old_dir_bh) {
1567 mlog(ML_ERROR, "need to change nlink for old dir "
1568 "%llu from %d to %d but bh is NULL!\n",
1569 (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1570 (int)old_dir_nlink, old_dir->i_nlink);
1571 } else {
1572 struct ocfs2_dinode *fe;
1573 status = ocfs2_journal_access_di(handle,
1574 INODE_CACHE(old_dir),
1575 old_dir_bh,
1576 OCFS2_JOURNAL_ACCESS_WRITE);
1577 fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1578 ocfs2_set_links_count(fe, old_dir->i_nlink);
1579 ocfs2_journal_dirty(handle, old_dir_bh);
1580 }
1581 }
1582 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1583 status = 0;
1584 bail:
1585 if (rename_lock)
1586 ocfs2_rename_unlock(osb);
1587
1588 if (handle)
1589 ocfs2_commit_trans(osb, handle);
1590
1591 if (parents_locked)
1592 ocfs2_double_unlock(old_dir, new_dir);
1593
1594 if (old_child_locked)
1595 ocfs2_inode_unlock(old_inode, 1);
1596
1597 if (new_child_locked)
1598 ocfs2_inode_unlock(new_inode, 1);
1599
1600 if (orphan_dir) {
1601 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1602 ocfs2_inode_unlock(orphan_dir, 1);
1603 mutex_unlock(&orphan_dir->i_mutex);
1604 iput(orphan_dir);
1605 }
1606
1607 if (new_inode)
1608 sync_mapping_buffers(old_inode->i_mapping);
1609
1610 if (new_inode)
1611 iput(new_inode);
1612
1613 ocfs2_free_dir_lookup_result(&target_lookup_res);
1614 ocfs2_free_dir_lookup_result(&old_entry_lookup);
1615 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1616 ocfs2_free_dir_lookup_result(&orphan_insert);
1617 ocfs2_free_dir_lookup_result(&target_insert);
1618
1619 brelse(newfe_bh);
1620 brelse(old_inode_bh);
1621 brelse(old_dir_bh);
1622 brelse(new_dir_bh);
1623
1624 if (status)
1625 mlog_errno(status);
1626
1627 return status;
1628 }
1629
1630 /*
1631 * we expect i_size = strlen(symname). Copy symname into the file
1632 * data, including the null terminator.
1633 */
1634 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1635 handle_t *handle,
1636 struct inode *inode,
1637 const char *symname)
1638 {
1639 struct buffer_head **bhs = NULL;
1640 const char *c;
1641 struct super_block *sb = osb->sb;
1642 u64 p_blkno, p_blocks;
1643 int virtual, blocks, status, i, bytes_left;
1644
1645 bytes_left = i_size_read(inode) + 1;
1646 /* we can't trust i_blocks because we're actually going to
1647 * write i_size + 1 bytes. */
1648 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1649
1650 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1651 i_size_read(inode), blocks);
1652
1653 /* Sanity check -- make sure we're going to fit. */
1654 if (bytes_left >
1655 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1656 status = -EIO;
1657 mlog_errno(status);
1658 goto bail;
1659 }
1660
1661 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1662 if (!bhs) {
1663 status = -ENOMEM;
1664 mlog_errno(status);
1665 goto bail;
1666 }
1667
1668 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1669 NULL);
1670 if (status < 0) {
1671 mlog_errno(status);
1672 goto bail;
1673 }
1674
1675 /* links can never be larger than one cluster so we know this
1676 * is all going to be contiguous, but do a sanity check
1677 * anyway. */
1678 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1679 status = -EIO;
1680 mlog_errno(status);
1681 goto bail;
1682 }
1683
1684 virtual = 0;
1685 while(bytes_left > 0) {
1686 c = &symname[virtual * sb->s_blocksize];
1687
1688 bhs[virtual] = sb_getblk(sb, p_blkno);
1689 if (!bhs[virtual]) {
1690 status = -ENOMEM;
1691 mlog_errno(status);
1692 goto bail;
1693 }
1694 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1695 bhs[virtual]);
1696
1697 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1698 bhs[virtual],
1699 OCFS2_JOURNAL_ACCESS_CREATE);
1700 if (status < 0) {
1701 mlog_errno(status);
1702 goto bail;
1703 }
1704
1705 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1706
1707 memcpy(bhs[virtual]->b_data, c,
1708 (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1709 bytes_left);
1710
1711 ocfs2_journal_dirty(handle, bhs[virtual]);
1712
1713 virtual++;
1714 p_blkno++;
1715 bytes_left -= sb->s_blocksize;
1716 }
1717
1718 status = 0;
1719 bail:
1720
1721 if (bhs) {
1722 for(i = 0; i < blocks; i++)
1723 brelse(bhs[i]);
1724 kfree(bhs);
1725 }
1726
1727 if (status)
1728 mlog_errno(status);
1729 return status;
1730 }
1731
1732 static int ocfs2_symlink(struct inode *dir,
1733 struct dentry *dentry,
1734 const char *symname)
1735 {
1736 int status, l, credits;
1737 u64 newsize;
1738 struct ocfs2_super *osb = NULL;
1739 struct inode *inode = NULL;
1740 struct super_block *sb;
1741 struct buffer_head *new_fe_bh = NULL;
1742 struct buffer_head *parent_fe_bh = NULL;
1743 struct ocfs2_dinode *fe = NULL;
1744 struct ocfs2_dinode *dirfe;
1745 handle_t *handle = NULL;
1746 struct ocfs2_alloc_context *inode_ac = NULL;
1747 struct ocfs2_alloc_context *data_ac = NULL;
1748 struct ocfs2_alloc_context *xattr_ac = NULL;
1749 int want_clusters = 0;
1750 int xattr_credits = 0;
1751 struct ocfs2_security_xattr_info si = {
1752 .enable = 1,
1753 };
1754 int did_quota = 0, did_quota_inode = 0;
1755 struct ocfs2_dir_lookup_result lookup = { NULL, };
1756 sigset_t oldset;
1757 int did_block_signals = 0;
1758 struct ocfs2_dentry_lock *dl = NULL;
1759
1760 trace_ocfs2_symlink_begin(dir, dentry, symname,
1761 dentry->d_name.len, dentry->d_name.name);
1762
1763 dquot_initialize(dir);
1764
1765 sb = dir->i_sb;
1766 osb = OCFS2_SB(sb);
1767
1768 l = strlen(symname) + 1;
1769
1770 credits = ocfs2_calc_symlink_credits(sb);
1771
1772 /* lock the parent directory */
1773 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1774 if (status < 0) {
1775 if (status != -ENOENT)
1776 mlog_errno(status);
1777 return status;
1778 }
1779
1780 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1781 if (!ocfs2_read_links_count(dirfe)) {
1782 /* can't make a file in a deleted directory. */
1783 status = -ENOENT;
1784 goto bail;
1785 }
1786
1787 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1788 dentry->d_name.len);
1789 if (status)
1790 goto bail;
1791
1792 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1793 dentry->d_name.name,
1794 dentry->d_name.len, &lookup);
1795 if (status < 0) {
1796 mlog_errno(status);
1797 goto bail;
1798 }
1799
1800 status = ocfs2_reserve_new_inode(osb, &inode_ac);
1801 if (status < 0) {
1802 if (status != -ENOSPC)
1803 mlog_errno(status);
1804 goto bail;
1805 }
1806
1807 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1808 if (!inode) {
1809 status = -ENOMEM;
1810 mlog_errno(status);
1811 goto bail;
1812 }
1813
1814 /* get security xattr */
1815 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1816 if (status) {
1817 if (status == -EOPNOTSUPP)
1818 si.enable = 0;
1819 else {
1820 mlog_errno(status);
1821 goto bail;
1822 }
1823 }
1824
1825 /* calculate meta data/clusters for setting security xattr */
1826 if (si.enable) {
1827 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1828 &xattr_credits, &xattr_ac);
1829 if (status < 0) {
1830 mlog_errno(status);
1831 goto bail;
1832 }
1833 }
1834
1835 /* don't reserve bitmap space for fast symlinks. */
1836 if (l > ocfs2_fast_symlink_chars(sb))
1837 want_clusters += 1;
1838
1839 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1840 if (status < 0) {
1841 if (status != -ENOSPC)
1842 mlog_errno(status);
1843 goto bail;
1844 }
1845
1846 handle = ocfs2_start_trans(osb, credits + xattr_credits);
1847 if (IS_ERR(handle)) {
1848 status = PTR_ERR(handle);
1849 handle = NULL;
1850 mlog_errno(status);
1851 goto bail;
1852 }
1853
1854 /* Starting to change things, restart is no longer possible. */
1855 ocfs2_block_signals(&oldset);
1856 did_block_signals = 1;
1857
1858 status = dquot_alloc_inode(inode);
1859 if (status)
1860 goto bail;
1861 did_quota_inode = 1;
1862
1863 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1864 dentry->d_name.name,
1865 (unsigned long long)OCFS2_I(dir)->ip_blkno,
1866 inode->i_mode);
1867
1868 status = ocfs2_mknod_locked(osb, dir, inode,
1869 0, &new_fe_bh, parent_fe_bh, handle,
1870 inode_ac);
1871 if (status < 0) {
1872 mlog_errno(status);
1873 goto bail;
1874 }
1875
1876 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1877 inode->i_rdev = 0;
1878 newsize = l - 1;
1879 inode->i_op = &ocfs2_symlink_inode_operations;
1880 if (l > ocfs2_fast_symlink_chars(sb)) {
1881 u32 offset = 0;
1882
1883 status = dquot_alloc_space_nodirty(inode,
1884 ocfs2_clusters_to_bytes(osb->sb, 1));
1885 if (status)
1886 goto bail;
1887 did_quota = 1;
1888 inode->i_mapping->a_ops = &ocfs2_aops;
1889 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1890 new_fe_bh,
1891 handle, data_ac, NULL,
1892 NULL);
1893 if (status < 0) {
1894 if (status != -ENOSPC && status != -EINTR) {
1895 mlog(ML_ERROR,
1896 "Failed to extend file to %llu\n",
1897 (unsigned long long)newsize);
1898 mlog_errno(status);
1899 status = -ENOSPC;
1900 }
1901 goto bail;
1902 }
1903 i_size_write(inode, newsize);
1904 inode->i_blocks = ocfs2_inode_sector_count(inode);
1905 } else {
1906 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1907 memcpy((char *) fe->id2.i_symlink, symname, l);
1908 i_size_write(inode, newsize);
1909 inode->i_blocks = 0;
1910 }
1911
1912 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1913 if (status < 0) {
1914 mlog_errno(status);
1915 goto bail;
1916 }
1917
1918 if (!ocfs2_inode_is_fast_symlink(inode)) {
1919 status = ocfs2_create_symlink_data(osb, handle, inode,
1920 symname);
1921 if (status < 0) {
1922 mlog_errno(status);
1923 goto bail;
1924 }
1925 }
1926
1927 if (si.enable) {
1928 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1929 xattr_ac, data_ac);
1930 if (status < 0) {
1931 mlog_errno(status);
1932 goto bail;
1933 }
1934 }
1935
1936 /*
1937 * Do this before adding the entry to the directory. We add
1938 * also set d_op after success so that ->d_iput() will cleanup
1939 * the dentry lock even if ocfs2_add_entry() fails below.
1940 */
1941 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1942 if (status) {
1943 mlog_errno(status);
1944 goto bail;
1945 }
1946
1947 dl = dentry->d_fsdata;
1948
1949 status = ocfs2_add_entry(handle, dentry, inode,
1950 le64_to_cpu(fe->i_blkno), parent_fe_bh,
1951 &lookup);
1952 if (status < 0) {
1953 mlog_errno(status);
1954 goto bail;
1955 }
1956
1957 insert_inode_hash(inode);
1958 d_instantiate(dentry, inode);
1959 bail:
1960 if (status < 0 && did_quota)
1961 dquot_free_space_nodirty(inode,
1962 ocfs2_clusters_to_bytes(osb->sb, 1));
1963 if (status < 0 && did_quota_inode)
1964 dquot_free_inode(inode);
1965 if (handle)
1966 ocfs2_commit_trans(osb, handle);
1967
1968 ocfs2_inode_unlock(dir, 1);
1969 if (did_block_signals)
1970 ocfs2_unblock_signals(&oldset);
1971
1972 brelse(new_fe_bh);
1973 brelse(parent_fe_bh);
1974 kfree(si.value);
1975 ocfs2_free_dir_lookup_result(&lookup);
1976 if (inode_ac)
1977 ocfs2_free_alloc_context(inode_ac);
1978 if (data_ac)
1979 ocfs2_free_alloc_context(data_ac);
1980 if (xattr_ac)
1981 ocfs2_free_alloc_context(xattr_ac);
1982 if ((status < 0) && inode) {
1983 if (dl)
1984 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
1985
1986 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
1987 clear_nlink(inode);
1988 iput(inode);
1989 }
1990
1991 if (status)
1992 mlog_errno(status);
1993
1994 return status;
1995 }
1996
1997 static int ocfs2_blkno_stringify(u64 blkno, char *name)
1998 {
1999 int status, namelen;
2000
2001 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2002 (long long)blkno);
2003 if (namelen <= 0) {
2004 if (namelen)
2005 status = namelen;
2006 else
2007 status = -EINVAL;
2008 mlog_errno(status);
2009 goto bail;
2010 }
2011 if (namelen != OCFS2_ORPHAN_NAMELEN) {
2012 status = -EINVAL;
2013 mlog_errno(status);
2014 goto bail;
2015 }
2016
2017 trace_ocfs2_blkno_stringify(blkno, name, namelen);
2018
2019 status = 0;
2020 bail:
2021 if (status < 0)
2022 mlog_errno(status);
2023 return status;
2024 }
2025
2026 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2027 struct inode **ret_orphan_dir,
2028 struct buffer_head **ret_orphan_dir_bh)
2029 {
2030 struct inode *orphan_dir_inode;
2031 struct buffer_head *orphan_dir_bh = NULL;
2032 int ret = 0;
2033
2034 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2035 ORPHAN_DIR_SYSTEM_INODE,
2036 osb->slot_num);
2037 if (!orphan_dir_inode) {
2038 ret = -ENOENT;
2039 mlog_errno(ret);
2040 return ret;
2041 }
2042
2043 mutex_lock(&orphan_dir_inode->i_mutex);
2044
2045 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2046 if (ret < 0) {
2047 mutex_unlock(&orphan_dir_inode->i_mutex);
2048 iput(orphan_dir_inode);
2049
2050 mlog_errno(ret);
2051 return ret;
2052 }
2053
2054 *ret_orphan_dir = orphan_dir_inode;
2055 *ret_orphan_dir_bh = orphan_dir_bh;
2056
2057 return 0;
2058 }
2059
2060 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2061 struct buffer_head *orphan_dir_bh,
2062 u64 blkno,
2063 char *name,
2064 struct ocfs2_dir_lookup_result *lookup)
2065 {
2066 int ret;
2067 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2068
2069 ret = ocfs2_blkno_stringify(blkno, name);
2070 if (ret < 0) {
2071 mlog_errno(ret);
2072 return ret;
2073 }
2074
2075 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2076 orphan_dir_bh, name,
2077 OCFS2_ORPHAN_NAMELEN, lookup);
2078 if (ret < 0) {
2079 mlog_errno(ret);
2080 return ret;
2081 }
2082
2083 return 0;
2084 }
2085
2086 /**
2087 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2088 * insertion of an orphan.
2089 * @osb: ocfs2 file system
2090 * @ret_orphan_dir: Orphan dir inode - returned locked!
2091 * @blkno: Actual block number of the inode to be inserted into orphan dir.
2092 * @lookup: dir lookup result, to be passed back into functions like
2093 * ocfs2_orphan_add
2094 *
2095 * Returns zero on success and the ret_orphan_dir, name and lookup
2096 * fields will be populated.
2097 *
2098 * Returns non-zero on failure.
2099 */
2100 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2101 struct inode **ret_orphan_dir,
2102 u64 blkno,
2103 char *name,
2104 struct ocfs2_dir_lookup_result *lookup)
2105 {
2106 struct inode *orphan_dir_inode = NULL;
2107 struct buffer_head *orphan_dir_bh = NULL;
2108 int ret = 0;
2109
2110 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2111 &orphan_dir_bh);
2112 if (ret < 0) {
2113 mlog_errno(ret);
2114 return ret;
2115 }
2116
2117 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2118 blkno, name, lookup);
2119 if (ret < 0) {
2120 mlog_errno(ret);
2121 goto out;
2122 }
2123
2124 *ret_orphan_dir = orphan_dir_inode;
2125
2126 out:
2127 brelse(orphan_dir_bh);
2128
2129 if (ret) {
2130 ocfs2_inode_unlock(orphan_dir_inode, 1);
2131 mutex_unlock(&orphan_dir_inode->i_mutex);
2132 iput(orphan_dir_inode);
2133 }
2134
2135 if (ret)
2136 mlog_errno(ret);
2137 return ret;
2138 }
2139
2140 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2141 handle_t *handle,
2142 struct inode *inode,
2143 struct buffer_head *fe_bh,
2144 char *name,
2145 struct ocfs2_dir_lookup_result *lookup,
2146 struct inode *orphan_dir_inode)
2147 {
2148 struct buffer_head *orphan_dir_bh = NULL;
2149 int status = 0;
2150 struct ocfs2_dinode *orphan_fe;
2151 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2152
2153 trace_ocfs2_orphan_add_begin(
2154 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2155
2156 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2157 if (status < 0) {
2158 mlog_errno(status);
2159 goto leave;
2160 }
2161
2162 status = ocfs2_journal_access_di(handle,
2163 INODE_CACHE(orphan_dir_inode),
2164 orphan_dir_bh,
2165 OCFS2_JOURNAL_ACCESS_WRITE);
2166 if (status < 0) {
2167 mlog_errno(status);
2168 goto leave;
2169 }
2170
2171 /*
2172 * We're going to journal the change of i_flags and i_orphaned_slot.
2173 * It's safe anyway, though some callers may duplicate the journaling.
2174 * Journaling within the func just make the logic look more
2175 * straightforward.
2176 */
2177 status = ocfs2_journal_access_di(handle,
2178 INODE_CACHE(inode),
2179 fe_bh,
2180 OCFS2_JOURNAL_ACCESS_WRITE);
2181 if (status < 0) {
2182 mlog_errno(status);
2183 goto leave;
2184 }
2185
2186 /* we're a cluster, and nlink can change on disk from
2187 * underneath us... */
2188 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2189 if (S_ISDIR(inode->i_mode))
2190 ocfs2_add_links_count(orphan_fe, 1);
2191 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2192 ocfs2_journal_dirty(handle, orphan_dir_bh);
2193
2194 status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2195 OCFS2_ORPHAN_NAMELEN, inode,
2196 OCFS2_I(inode)->ip_blkno,
2197 orphan_dir_bh, lookup);
2198 if (status < 0) {
2199 mlog_errno(status);
2200 goto rollback;
2201 }
2202
2203 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2204 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2205
2206 /* Record which orphan dir our inode now resides
2207 * in. delete_inode will use this to determine which orphan
2208 * dir to lock. */
2209 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2210
2211 ocfs2_journal_dirty(handle, fe_bh);
2212
2213 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2214 osb->slot_num);
2215
2216 rollback:
2217 if (status < 0) {
2218 if (S_ISDIR(inode->i_mode))
2219 ocfs2_add_links_count(orphan_fe, -1);
2220 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2221 }
2222
2223 leave:
2224 brelse(orphan_dir_bh);
2225
2226 return status;
2227 }
2228
2229 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2230 int ocfs2_orphan_del(struct ocfs2_super *osb,
2231 handle_t *handle,
2232 struct inode *orphan_dir_inode,
2233 struct inode *inode,
2234 struct buffer_head *orphan_dir_bh)
2235 {
2236 char name[OCFS2_ORPHAN_NAMELEN + 1];
2237 struct ocfs2_dinode *orphan_fe;
2238 int status = 0;
2239 struct ocfs2_dir_lookup_result lookup = { NULL, };
2240
2241 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2242 if (status < 0) {
2243 mlog_errno(status);
2244 goto leave;
2245 }
2246
2247 trace_ocfs2_orphan_del(
2248 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2249 name, OCFS2_ORPHAN_NAMELEN);
2250
2251 /* find it's spot in the orphan directory */
2252 status = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, orphan_dir_inode,
2253 &lookup);
2254 if (status) {
2255 mlog_errno(status);
2256 goto leave;
2257 }
2258
2259 /* remove it from the orphan directory */
2260 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
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 /* do the i_nlink dance! :) */
2276 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2277 if (S_ISDIR(inode->i_mode))
2278 ocfs2_add_links_count(orphan_fe, -1);
2279 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2280 ocfs2_journal_dirty(handle, orphan_dir_bh);
2281
2282 leave:
2283 ocfs2_free_dir_lookup_result(&lookup);
2284
2285 if (status)
2286 mlog_errno(status);
2287 return status;
2288 }
2289
2290 /**
2291 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2292 * allocated file. This is different from the typical 'add to orphan dir'
2293 * operation in that the inode does not yet exist. This is a problem because
2294 * the orphan dir stringifies the inode block number to come up with it's
2295 * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2296 * problem. This function works around it by calling deeper into the orphan
2297 * and suballoc code than other callers. Use this only by necessity.
2298 * @dir: The directory which this inode will ultimately wind up under - not the
2299 * orphan dir!
2300 * @dir_bh: buffer_head the @dir inode block
2301 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2302 * with the string to be used for orphan dirent. Pass back to the orphan dir
2303 * code.
2304 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2305 * dir code.
2306 * @ret_di_blkno: block number where the new inode will be allocated.
2307 * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2308 * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2309 *
2310 * Returns zero on success and the ret_orphan_dir, name and lookup
2311 * fields will be populated.
2312 *
2313 * Returns non-zero on failure.
2314 */
2315 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2316 struct buffer_head *dir_bh,
2317 char *orphan_name,
2318 struct inode **ret_orphan_dir,
2319 u64 *ret_di_blkno,
2320 struct ocfs2_dir_lookup_result *orphan_insert,
2321 struct ocfs2_alloc_context **ret_inode_ac)
2322 {
2323 int ret;
2324 u64 di_blkno;
2325 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2326 struct inode *orphan_dir = NULL;
2327 struct buffer_head *orphan_dir_bh = NULL;
2328 struct ocfs2_alloc_context *inode_ac = NULL;
2329
2330 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2331 if (ret < 0) {
2332 mlog_errno(ret);
2333 return ret;
2334 }
2335
2336 /* reserve an inode spot */
2337 ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2338 if (ret < 0) {
2339 if (ret != -ENOSPC)
2340 mlog_errno(ret);
2341 goto out;
2342 }
2343
2344 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2345 &di_blkno);
2346 if (ret) {
2347 mlog_errno(ret);
2348 goto out;
2349 }
2350
2351 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2352 di_blkno, orphan_name, orphan_insert);
2353 if (ret < 0) {
2354 mlog_errno(ret);
2355 goto out;
2356 }
2357
2358 out:
2359 if (ret == 0) {
2360 *ret_orphan_dir = orphan_dir;
2361 *ret_di_blkno = di_blkno;
2362 *ret_inode_ac = inode_ac;
2363 /*
2364 * orphan_name and orphan_insert are already up to
2365 * date via prepare_orphan_dir
2366 */
2367 } else {
2368 /* Unroll reserve_new_inode* */
2369 if (inode_ac)
2370 ocfs2_free_alloc_context(inode_ac);
2371
2372 /* Unroll orphan dir locking */
2373 mutex_unlock(&orphan_dir->i_mutex);
2374 ocfs2_inode_unlock(orphan_dir, 1);
2375 iput(orphan_dir);
2376 }
2377
2378 brelse(orphan_dir_bh);
2379
2380 return ret;
2381 }
2382
2383 int ocfs2_create_inode_in_orphan(struct inode *dir,
2384 int mode,
2385 struct inode **new_inode)
2386 {
2387 int status, did_quota_inode = 0;
2388 struct inode *inode = NULL;
2389 struct inode *orphan_dir = NULL;
2390 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2391 struct ocfs2_dinode *di = NULL;
2392 handle_t *handle = NULL;
2393 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2394 struct buffer_head *parent_di_bh = NULL;
2395 struct buffer_head *new_di_bh = NULL;
2396 struct ocfs2_alloc_context *inode_ac = NULL;
2397 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2398 u64 uninitialized_var(di_blkno), suballoc_loc;
2399 u16 suballoc_bit;
2400
2401 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2402 if (status < 0) {
2403 if (status != -ENOENT)
2404 mlog_errno(status);
2405 return status;
2406 }
2407
2408 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2409 orphan_name, &orphan_dir,
2410 &di_blkno, &orphan_insert, &inode_ac);
2411 if (status < 0) {
2412 if (status != -ENOSPC)
2413 mlog_errno(status);
2414 goto leave;
2415 }
2416
2417 inode = ocfs2_get_init_inode(dir, mode);
2418 if (!inode) {
2419 status = -ENOMEM;
2420 mlog_errno(status);
2421 goto leave;
2422 }
2423
2424 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2425 if (IS_ERR(handle)) {
2426 status = PTR_ERR(handle);
2427 handle = NULL;
2428 mlog_errno(status);
2429 goto leave;
2430 }
2431
2432 status = dquot_alloc_inode(inode);
2433 if (status)
2434 goto leave;
2435 did_quota_inode = 1;
2436
2437 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2438 &suballoc_loc,
2439 &suballoc_bit, di_blkno);
2440 if (status < 0) {
2441 mlog_errno(status);
2442 goto leave;
2443 }
2444
2445 clear_nlink(inode);
2446 /* do the real work now. */
2447 status = __ocfs2_mknod_locked(dir, inode,
2448 0, &new_di_bh, parent_di_bh, handle,
2449 inode_ac, di_blkno, suballoc_loc,
2450 suballoc_bit);
2451 if (status < 0) {
2452 mlog_errno(status);
2453 goto leave;
2454 }
2455
2456 di = (struct ocfs2_dinode *)new_di_bh->b_data;
2457 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2458 &orphan_insert, orphan_dir);
2459 if (status < 0) {
2460 mlog_errno(status);
2461 goto leave;
2462 }
2463
2464 /* get open lock so that only nodes can't remove it from orphan dir. */
2465 status = ocfs2_open_lock(inode);
2466 if (status < 0)
2467 mlog_errno(status);
2468
2469 insert_inode_hash(inode);
2470 leave:
2471 if (status < 0 && did_quota_inode)
2472 dquot_free_inode(inode);
2473 if (handle)
2474 ocfs2_commit_trans(osb, handle);
2475
2476 if (orphan_dir) {
2477 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2478 ocfs2_inode_unlock(orphan_dir, 1);
2479 mutex_unlock(&orphan_dir->i_mutex);
2480 iput(orphan_dir);
2481 }
2482
2483 if ((status < 0) && inode) {
2484 clear_nlink(inode);
2485 iput(inode);
2486 }
2487
2488 if (inode_ac)
2489 ocfs2_free_alloc_context(inode_ac);
2490
2491 brelse(new_di_bh);
2492
2493 if (!status)
2494 *new_inode = inode;
2495
2496 ocfs2_free_dir_lookup_result(&orphan_insert);
2497
2498 ocfs2_inode_unlock(dir, 1);
2499 brelse(parent_di_bh);
2500 return status;
2501 }
2502
2503 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2504 struct inode *inode,
2505 struct dentry *dentry)
2506 {
2507 int status = 0;
2508 struct buffer_head *parent_di_bh = NULL;
2509 handle_t *handle = NULL;
2510 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2511 struct ocfs2_dinode *dir_di, *di;
2512 struct inode *orphan_dir_inode = NULL;
2513 struct buffer_head *orphan_dir_bh = NULL;
2514 struct buffer_head *di_bh = NULL;
2515 struct ocfs2_dir_lookup_result lookup = { NULL, };
2516
2517 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2518 dentry->d_name.len, dentry->d_name.name,
2519 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2520 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2521
2522 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2523 if (status < 0) {
2524 if (status != -ENOENT)
2525 mlog_errno(status);
2526 return status;
2527 }
2528
2529 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2530 if (!dir_di->i_links_count) {
2531 /* can't make a file in a deleted directory. */
2532 status = -ENOENT;
2533 goto leave;
2534 }
2535
2536 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2537 dentry->d_name.len);
2538 if (status)
2539 goto leave;
2540
2541 /* get a spot inside the dir. */
2542 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2543 dentry->d_name.name,
2544 dentry->d_name.len, &lookup);
2545 if (status < 0) {
2546 mlog_errno(status);
2547 goto leave;
2548 }
2549
2550 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2551 ORPHAN_DIR_SYSTEM_INODE,
2552 osb->slot_num);
2553 if (!orphan_dir_inode) {
2554 status = -EEXIST;
2555 mlog_errno(status);
2556 goto leave;
2557 }
2558
2559 mutex_lock(&orphan_dir_inode->i_mutex);
2560
2561 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2562 if (status < 0) {
2563 mlog_errno(status);
2564 mutex_unlock(&orphan_dir_inode->i_mutex);
2565 iput(orphan_dir_inode);
2566 goto leave;
2567 }
2568
2569 status = ocfs2_read_inode_block(inode, &di_bh);
2570 if (status < 0) {
2571 mlog_errno(status);
2572 goto orphan_unlock;
2573 }
2574
2575 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2576 if (IS_ERR(handle)) {
2577 status = PTR_ERR(handle);
2578 handle = NULL;
2579 mlog_errno(status);
2580 goto orphan_unlock;
2581 }
2582
2583 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2584 di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2585 if (status < 0) {
2586 mlog_errno(status);
2587 goto out_commit;
2588 }
2589
2590 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2591 orphan_dir_bh);
2592 if (status < 0) {
2593 mlog_errno(status);
2594 goto out_commit;
2595 }
2596
2597 di = (struct ocfs2_dinode *)di_bh->b_data;
2598 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2599 di->i_orphaned_slot = 0;
2600 set_nlink(inode, 1);
2601 ocfs2_set_links_count(di, inode->i_nlink);
2602 ocfs2_update_inode_fsync_trans(handle, inode, 1);
2603 ocfs2_journal_dirty(handle, di_bh);
2604
2605 status = ocfs2_add_entry(handle, dentry, inode,
2606 OCFS2_I(inode)->ip_blkno, parent_di_bh,
2607 &lookup);
2608 if (status < 0) {
2609 mlog_errno(status);
2610 goto out_commit;
2611 }
2612
2613 status = ocfs2_dentry_attach_lock(dentry, inode,
2614 OCFS2_I(dir)->ip_blkno);
2615 if (status) {
2616 mlog_errno(status);
2617 goto out_commit;
2618 }
2619
2620 d_instantiate(dentry, inode);
2621 status = 0;
2622 out_commit:
2623 ocfs2_commit_trans(osb, handle);
2624 orphan_unlock:
2625 ocfs2_inode_unlock(orphan_dir_inode, 1);
2626 mutex_unlock(&orphan_dir_inode->i_mutex);
2627 iput(orphan_dir_inode);
2628 leave:
2629
2630 ocfs2_inode_unlock(dir, 1);
2631
2632 brelse(di_bh);
2633 brelse(parent_di_bh);
2634 brelse(orphan_dir_bh);
2635
2636 ocfs2_free_dir_lookup_result(&lookup);
2637
2638 if (status)
2639 mlog_errno(status);
2640
2641 return status;
2642 }
2643
2644 const struct inode_operations ocfs2_dir_iops = {
2645 .create = ocfs2_create,
2646 .lookup = ocfs2_lookup,
2647 .link = ocfs2_link,
2648 .unlink = ocfs2_unlink,
2649 .rmdir = ocfs2_unlink,
2650 .symlink = ocfs2_symlink,
2651 .mkdir = ocfs2_mkdir,
2652 .mknod = ocfs2_mknod,
2653 .rename = ocfs2_rename,
2654 .setattr = ocfs2_setattr,
2655 .getattr = ocfs2_getattr,
2656 .permission = ocfs2_permission,
2657 .setxattr = generic_setxattr,
2658 .getxattr = generic_getxattr,
2659 .listxattr = ocfs2_listxattr,
2660 .removexattr = generic_removexattr,
2661 .fiemap = ocfs2_fiemap,
2662 .get_acl = ocfs2_iop_get_acl,
2663 .set_acl = ocfs2_iop_set_acl,
2664 };
Linux with added FPC-III support