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irqchip/s3c24xx: Mark init_eint as __maybe_unused
[linux/fpc-iii.git] / fs / ocfs2 / namei.c
blobafb81eae2c1876f595e8f24446fb19bb992bb313
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, &inode->i_mode, &default_acl, &acl);
371 if (status) {
372 mlog_errno(status);
373 goto leave;
374 }
375
376 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
377 S_ISDIR(mode),
378 xattr_credits));
379 if (IS_ERR(handle)) {
380 status = PTR_ERR(handle);
381 handle = NULL;
382 mlog_errno(status);
383 goto leave;
384 }
385
386 /* Starting to change things, restart is no longer possible. */
387 ocfs2_block_signals(&oldset);
388 did_block_signals = 1;
389
390 status = dquot_alloc_inode(inode);
391 if (status)
392 goto leave;
393 did_quota_inode = 1;
394
395 /* do the real work now. */
396 status = ocfs2_mknod_locked(osb, dir, inode, dev,
397 &new_fe_bh, parent_fe_bh, handle,
398 inode_ac);
399 if (status < 0) {
400 mlog_errno(status);
401 goto leave;
402 }
403
404 if (S_ISDIR(mode)) {
405 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
406 new_fe_bh, data_ac, meta_ac);
407 if (status < 0) {
408 mlog_errno(status);
409 goto leave;
410 }
411
412 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
413 parent_fe_bh,
414 OCFS2_JOURNAL_ACCESS_WRITE);
415 if (status < 0) {
416 mlog_errno(status);
417 goto leave;
418 }
419 ocfs2_add_links_count(dirfe, 1);
420 ocfs2_journal_dirty(handle, parent_fe_bh);
421 inc_nlink(dir);
422 }
423
424 if (default_acl) {
425 status = ocfs2_set_acl(handle, inode, new_fe_bh,
426 ACL_TYPE_DEFAULT, default_acl,
427 meta_ac, data_ac);
428 }
429 if (!status && acl) {
430 status = ocfs2_set_acl(handle, inode, new_fe_bh,
431 ACL_TYPE_ACCESS, acl,
432 meta_ac, data_ac);
433 }
434
435 if (status < 0) {
436 mlog_errno(status);
437 goto leave;
438 }
439
440 if (si.enable) {
441 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
442 meta_ac, data_ac);
443 if (status < 0) {
444 mlog_errno(status);
445 goto leave;
446 }
447 }
448
449 /*
450 * Do this before adding the entry to the directory. We add
451 * also set d_op after success so that ->d_iput() will cleanup
452 * the dentry lock even if ocfs2_add_entry() fails below.
453 */
454 status = ocfs2_dentry_attach_lock(dentry, inode,
455 OCFS2_I(dir)->ip_blkno);
456 if (status) {
457 mlog_errno(status);
458 goto leave;
459 }
460
461 dl = dentry->d_fsdata;
462
463 status = ocfs2_add_entry(handle, dentry, inode,
464 OCFS2_I(inode)->ip_blkno, parent_fe_bh,
465 &lookup);
466 if (status < 0) {
467 mlog_errno(status);
468 goto leave;
469 }
470
471 insert_inode_hash(inode);
472 d_instantiate(dentry, inode);
473 status = 0;
474 leave:
475 if (default_acl)
476 posix_acl_release(default_acl);
477 if (acl)
478 posix_acl_release(acl);
479 if (status < 0 && did_quota_inode)
480 dquot_free_inode(inode);
481 if (handle)
482 ocfs2_commit_trans(osb, handle);
483
484 ocfs2_inode_unlock(dir, 1);
485 if (did_block_signals)
486 ocfs2_unblock_signals(&oldset);
487
488 brelse(new_fe_bh);
489 brelse(parent_fe_bh);
490 kfree(si.value);
491
492 ocfs2_free_dir_lookup_result(&lookup);
493
494 if (inode_ac)
495 ocfs2_free_alloc_context(inode_ac);
496
497 if (data_ac)
498 ocfs2_free_alloc_context(data_ac);
499
500 if (meta_ac)
501 ocfs2_free_alloc_context(meta_ac);
502
503 /*
504 * We should call iput after the i_mutex of the bitmap been
505 * unlocked in ocfs2_free_alloc_context, or the
506 * ocfs2_delete_inode will mutex_lock again.
507 */
508 if ((status < 0) && inode) {
509 if (dl)
510 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
511
512 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
513 clear_nlink(inode);
514 iput(inode);
515 }
516
517 if (status)
518 mlog_errno(status);
519
520 return status;
521 }
522
523 static int __ocfs2_mknod_locked(struct inode *dir,
524 struct inode *inode,
525 dev_t dev,
526 struct buffer_head **new_fe_bh,
527 struct buffer_head *parent_fe_bh,
528 handle_t *handle,
529 struct ocfs2_alloc_context *inode_ac,
530 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
531 {
532 int status = 0;
533 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
534 struct ocfs2_dinode *fe = NULL;
535 struct ocfs2_extent_list *fel;
536 u16 feat;
537 struct ocfs2_inode_info *oi = OCFS2_I(inode);
538
539 *new_fe_bh = NULL;
540
541 /* populate as many fields early on as possible - many of
542 * these are used by the support functions here and in
543 * callers. */
544 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
545 OCFS2_I(inode)->ip_blkno = fe_blkno;
546 spin_lock(&osb->osb_lock);
547 inode->i_generation = osb->s_next_generation++;
548 spin_unlock(&osb->osb_lock);
549
550 *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
551 if (!*new_fe_bh) {
552 status = -ENOMEM;
553 mlog_errno(status);
554 goto leave;
555 }
556 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
557
558 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
559 *new_fe_bh,
560 OCFS2_JOURNAL_ACCESS_CREATE);
561 if (status < 0) {
562 mlog_errno(status);
563 goto leave;
564 }
565
566 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
567 memset(fe, 0, osb->sb->s_blocksize);
568
569 fe->i_generation = cpu_to_le32(inode->i_generation);
570 fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
571 fe->i_blkno = cpu_to_le64(fe_blkno);
572 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
573 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
574 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
575 fe->i_uid = cpu_to_le32(i_uid_read(inode));
576 fe->i_gid = cpu_to_le32(i_gid_read(inode));
577 fe->i_mode = cpu_to_le16(inode->i_mode);
578 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
579 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
580
581 ocfs2_set_links_count(fe, inode->i_nlink);
582
583 fe->i_last_eb_blk = 0;
584 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
585 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
586 fe->i_atime = fe->i_ctime = fe->i_mtime =
587 cpu_to_le64(CURRENT_TIME.tv_sec);
588 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
589 cpu_to_le32(CURRENT_TIME.tv_nsec);
590 fe->i_dtime = 0;
591
592 /*
593 * If supported, directories start with inline data. If inline
594 * isn't supported, but indexing is, we start them as indexed.
595 */
596 feat = le16_to_cpu(fe->i_dyn_features);
597 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
598 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
599
600 fe->id2.i_data.id_count = cpu_to_le16(
601 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
602 } else {
603 fel = &fe->id2.i_list;
604 fel->l_tree_depth = 0;
605 fel->l_next_free_rec = 0;
606 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
607 }
608
609 ocfs2_journal_dirty(handle, *new_fe_bh);
610
611 ocfs2_populate_inode(inode, fe, 1);
612 ocfs2_ci_set_new(osb, INODE_CACHE(inode));
613 if (!ocfs2_mount_local(osb)) {
614 status = ocfs2_create_new_inode_locks(inode);
615 if (status < 0)
616 mlog_errno(status);
617 }
618
619 oi->i_sync_tid = handle->h_transaction->t_tid;
620 oi->i_datasync_tid = handle->h_transaction->t_tid;
621
622 leave:
623 if (status < 0) {
624 if (*new_fe_bh) {
625 brelse(*new_fe_bh);
626 *new_fe_bh = NULL;
627 }
628 }
629
630 if (status)
631 mlog_errno(status);
632 return status;
633 }
634
635 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
636 struct inode *dir,
637 struct inode *inode,
638 dev_t dev,
639 struct buffer_head **new_fe_bh,
640 struct buffer_head *parent_fe_bh,
641 handle_t *handle,
642 struct ocfs2_alloc_context *inode_ac)
643 {
644 int status = 0;
645 u64 suballoc_loc, fe_blkno = 0;
646 u16 suballoc_bit;
647
648 *new_fe_bh = NULL;
649
650 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
651 inode_ac, &suballoc_loc,
652 &suballoc_bit, &fe_blkno);
653 if (status < 0) {
654 mlog_errno(status);
655 return status;
656 }
657
658 status = __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
659 parent_fe_bh, handle, inode_ac,
660 fe_blkno, suballoc_loc, suballoc_bit);
661 if (status < 0) {
662 u64 bg_blkno = ocfs2_which_suballoc_group(fe_blkno, suballoc_bit);
663 int tmp = ocfs2_free_suballoc_bits(handle, inode_ac->ac_inode,
664 inode_ac->ac_bh, suballoc_bit, bg_blkno, 1);
665 if (tmp)
666 mlog_errno(tmp);
667 }
668
669 return status;
670 }
671
672 static int ocfs2_mkdir(struct inode *dir,
673 struct dentry *dentry,
674 umode_t mode)
675 {
676 int ret;
677
678 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
679 OCFS2_I(dir)->ip_blkno, mode);
680 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
681 if (ret)
682 mlog_errno(ret);
683
684 return ret;
685 }
686
687 static int ocfs2_create(struct inode *dir,
688 struct dentry *dentry,
689 umode_t mode,
690 bool excl)
691 {
692 int ret;
693
694 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
695 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
696 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
697 if (ret)
698 mlog_errno(ret);
699
700 return ret;
701 }
702
703 static int ocfs2_link(struct dentry *old_dentry,
704 struct inode *dir,
705 struct dentry *dentry)
706 {
707 handle_t *handle;
708 struct inode *inode = d_inode(old_dentry);
709 struct inode *old_dir = d_inode(old_dentry->d_parent);
710 int err;
711 struct buffer_head *fe_bh = NULL;
712 struct buffer_head *old_dir_bh = NULL;
713 struct buffer_head *parent_fe_bh = NULL;
714 struct ocfs2_dinode *fe = NULL;
715 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
716 struct ocfs2_dir_lookup_result lookup = { NULL, };
717 sigset_t oldset;
718 u64 old_de_ino;
719
720 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
721 old_dentry->d_name.len, old_dentry->d_name.name,
722 dentry->d_name.len, dentry->d_name.name);
723
724 if (S_ISDIR(inode->i_mode))
725 return -EPERM;
726
727 err = dquot_initialize(dir);
728 if (err) {
729 mlog_errno(err);
730 return err;
731 }
732
733 err = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
734 &parent_fe_bh, dir, 0);
735 if (err < 0) {
736 if (err != -ENOENT)
737 mlog_errno(err);
738 return err;
739 }
740
741 /* make sure both dirs have bhs
742 * get an extra ref on old_dir_bh if old==new */
743 if (!parent_fe_bh) {
744 if (old_dir_bh) {
745 parent_fe_bh = old_dir_bh;
746 get_bh(parent_fe_bh);
747 } else {
748 mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str);
749 err = -EIO;
750 goto out;
751 }
752 }
753
754 if (!dir->i_nlink) {
755 err = -ENOENT;
756 goto out;
757 }
758
759 err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
760 old_dentry->d_name.len, &old_de_ino);
761 if (err) {
762 err = -ENOENT;
763 goto out;
764 }
765
766 /*
767 * Check whether another node removed the source inode while we
768 * were in the vfs.
769 */
770 if (old_de_ino != OCFS2_I(inode)->ip_blkno) {
771 err = -ENOENT;
772 goto out;
773 }
774
775 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
776 dentry->d_name.len);
777 if (err)
778 goto out;
779
780 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
781 dentry->d_name.name,
782 dentry->d_name.len, &lookup);
783 if (err < 0) {
784 mlog_errno(err);
785 goto out;
786 }
787
788 err = ocfs2_inode_lock(inode, &fe_bh, 1);
789 if (err < 0) {
790 if (err != -ENOENT)
791 mlog_errno(err);
792 goto out;
793 }
794
795 fe = (struct ocfs2_dinode *) fe_bh->b_data;
796 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
797 err = -EMLINK;
798 goto out_unlock_inode;
799 }
800
801 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
802 if (IS_ERR(handle)) {
803 err = PTR_ERR(handle);
804 handle = NULL;
805 mlog_errno(err);
806 goto out_unlock_inode;
807 }
808
809 /* Starting to change things, restart is no longer possible. */
810 ocfs2_block_signals(&oldset);
811
812 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
813 OCFS2_JOURNAL_ACCESS_WRITE);
814 if (err < 0) {
815 mlog_errno(err);
816 goto out_commit;
817 }
818
819 inc_nlink(inode);
820 inode->i_ctime = CURRENT_TIME;
821 ocfs2_set_links_count(fe, inode->i_nlink);
822 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
823 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
824 ocfs2_journal_dirty(handle, fe_bh);
825
826 err = ocfs2_add_entry(handle, dentry, inode,
827 OCFS2_I(inode)->ip_blkno,
828 parent_fe_bh, &lookup);
829 if (err) {
830 ocfs2_add_links_count(fe, -1);
831 drop_nlink(inode);
832 mlog_errno(err);
833 goto out_commit;
834 }
835
836 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
837 if (err) {
838 mlog_errno(err);
839 goto out_commit;
840 }
841
842 ihold(inode);
843 d_instantiate(dentry, inode);
844
845 out_commit:
846 ocfs2_commit_trans(osb, handle);
847 ocfs2_unblock_signals(&oldset);
848 out_unlock_inode:
849 ocfs2_inode_unlock(inode, 1);
850
851 out:
852 ocfs2_double_unlock(old_dir, dir);
853
854 brelse(fe_bh);
855 brelse(parent_fe_bh);
856 brelse(old_dir_bh);
857
858 ocfs2_free_dir_lookup_result(&lookup);
859
860 if (err)
861 mlog_errno(err);
862
863 return err;
864 }
865
866 /*
867 * Takes and drops an exclusive lock on the given dentry. This will
868 * force other nodes to drop it.
869 */
870 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
871 {
872 int ret;
873
874 ret = ocfs2_dentry_lock(dentry, 1);
875 if (ret)
876 mlog_errno(ret);
877 else
878 ocfs2_dentry_unlock(dentry, 1);
879
880 return ret;
881 }
882
883 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
884 {
885 if (S_ISDIR(inode->i_mode)) {
886 if (inode->i_nlink == 2)
887 return 1;
888 return 0;
889 }
890
891 if (inode->i_nlink == 1)
892 return 1;
893 return 0;
894 }
895
896 static int ocfs2_unlink(struct inode *dir,
897 struct dentry *dentry)
898 {
899 int status;
900 int child_locked = 0;
901 bool is_unlinkable = false;
902 struct inode *inode = d_inode(dentry);
903 struct inode *orphan_dir = NULL;
904 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
905 u64 blkno;
906 struct ocfs2_dinode *fe = NULL;
907 struct buffer_head *fe_bh = NULL;
908 struct buffer_head *parent_node_bh = NULL;
909 handle_t *handle = NULL;
910 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
911 struct ocfs2_dir_lookup_result lookup = { NULL, };
912 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
913
914 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
915 dentry->d_name.name,
916 (unsigned long long)OCFS2_I(dir)->ip_blkno,
917 (unsigned long long)OCFS2_I(inode)->ip_blkno);
918
919 status = dquot_initialize(dir);
920 if (status) {
921 mlog_errno(status);
922 return status;
923 }
924
925 BUG_ON(d_inode(dentry->d_parent) != dir);
926
927 if (inode == osb->root_inode)
928 return -EPERM;
929
930 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
931 OI_LS_PARENT);
932 if (status < 0) {
933 if (status != -ENOENT)
934 mlog_errno(status);
935 return status;
936 }
937
938 status = ocfs2_find_files_on_disk(dentry->d_name.name,
939 dentry->d_name.len, &blkno, dir,
940 &lookup);
941 if (status < 0) {
942 if (status != -ENOENT)
943 mlog_errno(status);
944 goto leave;
945 }
946
947 if (OCFS2_I(inode)->ip_blkno != blkno) {
948 status = -ENOENT;
949
950 trace_ocfs2_unlink_noent(
951 (unsigned long long)OCFS2_I(inode)->ip_blkno,
952 (unsigned long long)blkno,
953 OCFS2_I(inode)->ip_flags);
954 goto leave;
955 }
956
957 status = ocfs2_inode_lock(inode, &fe_bh, 1);
958 if (status < 0) {
959 if (status != -ENOENT)
960 mlog_errno(status);
961 goto leave;
962 }
963 child_locked = 1;
964
965 if (S_ISDIR(inode->i_mode)) {
966 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
967 status = -ENOTEMPTY;
968 goto leave;
969 }
970 }
971
972 status = ocfs2_remote_dentry_delete(dentry);
973 if (status < 0) {
974 /* This remote delete should succeed under all normal
975 * circumstances. */
976 mlog_errno(status);
977 goto leave;
978 }
979
980 if (ocfs2_inode_is_unlinkable(inode)) {
981 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
982 OCFS2_I(inode)->ip_blkno,
983 orphan_name, &orphan_insert,
984 false);
985 if (status < 0) {
986 mlog_errno(status);
987 goto leave;
988 }
989 is_unlinkable = true;
990 }
991
992 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
993 if (IS_ERR(handle)) {
994 status = PTR_ERR(handle);
995 handle = NULL;
996 mlog_errno(status);
997 goto leave;
998 }
999
1000 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
1001 OCFS2_JOURNAL_ACCESS_WRITE);
1002 if (status < 0) {
1003 mlog_errno(status);
1004 goto leave;
1005 }
1006
1007 fe = (struct ocfs2_dinode *) fe_bh->b_data;
1008
1009 /* delete the name from the parent dir */
1010 status = ocfs2_delete_entry(handle, dir, &lookup);
1011 if (status < 0) {
1012 mlog_errno(status);
1013 goto leave;
1014 }
1015
1016 if (S_ISDIR(inode->i_mode))
1017 drop_nlink(inode);
1018 drop_nlink(inode);
1019 ocfs2_set_links_count(fe, inode->i_nlink);
1020 ocfs2_journal_dirty(handle, fe_bh);
1021
1022 dir->i_ctime = dir->i_mtime = CURRENT_TIME;
1023 if (S_ISDIR(inode->i_mode))
1024 drop_nlink(dir);
1025
1026 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
1027 if (status < 0) {
1028 mlog_errno(status);
1029 if (S_ISDIR(inode->i_mode))
1030 inc_nlink(dir);
1031 goto leave;
1032 }
1033
1034 if (is_unlinkable) {
1035 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
1036 orphan_name, &orphan_insert, orphan_dir, false);
1037 if (status < 0)
1038 mlog_errno(status);
1039 }
1040
1041 leave:
1042 if (handle)
1043 ocfs2_commit_trans(osb, handle);
1044
1045 if (orphan_dir) {
1046 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1047 ocfs2_inode_unlock(orphan_dir, 1);
1048 mutex_unlock(&orphan_dir->i_mutex);
1049 iput(orphan_dir);
1050 }
1051
1052 if (child_locked)
1053 ocfs2_inode_unlock(inode, 1);
1054
1055 ocfs2_inode_unlock(dir, 1);
1056
1057 brelse(fe_bh);
1058 brelse(parent_node_bh);
1059
1060 ocfs2_free_dir_lookup_result(&orphan_insert);
1061 ocfs2_free_dir_lookup_result(&lookup);
1062
1063 if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
1064 mlog_errno(status);
1065
1066 return status;
1067 }
1068
1069 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb,
1070 u64 src_inode_no, u64 dest_inode_no)
1071 {
1072 int ret = 0, i = 0;
1073 u64 parent_inode_no = 0;
1074 u64 child_inode_no = src_inode_no;
1075 struct inode *child_inode;
1076
1077 #define MAX_LOOKUP_TIMES 32
1078 while (1) {
1079 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0);
1080 if (IS_ERR(child_inode)) {
1081 ret = PTR_ERR(child_inode);
1082 break;
1083 }
1084
1085 ret = ocfs2_inode_lock(child_inode, NULL, 0);
1086 if (ret < 0) {
1087 iput(child_inode);
1088 if (ret != -ENOENT)
1089 mlog_errno(ret);
1090 break;
1091 }
1092
1093 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2,
1094 &parent_inode_no);
1095 ocfs2_inode_unlock(child_inode, 0);
1096 iput(child_inode);
1097 if (ret < 0) {
1098 ret = -ENOENT;
1099 break;
1100 }
1101
1102 if (parent_inode_no == dest_inode_no) {
1103 ret = 1;
1104 break;
1105 }
1106
1107 if (parent_inode_no == osb->root_inode->i_ino) {
1108 ret = 0;
1109 break;
1110 }
1111
1112 child_inode_no = parent_inode_no;
1113
1114 if (++i >= MAX_LOOKUP_TIMES) {
1115 mlog(ML_NOTICE, "max lookup times reached, filesystem "
1116 "may have nested directories, "
1117 "src inode: %llu, dest inode: %llu.\n",
1118 (unsigned long long)src_inode_no,
1119 (unsigned long long)dest_inode_no);
1120 ret = 0;
1121 break;
1122 }
1123 }
1124
1125 return ret;
1126 }
1127
1128 /*
1129 * The only place this should be used is rename and link!
1130 * if they have the same id, then the 1st one is the only one locked.
1131 */
1132 static int ocfs2_double_lock(struct ocfs2_super *osb,
1133 struct buffer_head **bh1,
1134 struct inode *inode1,
1135 struct buffer_head **bh2,
1136 struct inode *inode2,
1137 int rename)
1138 {
1139 int status;
1140 int inode1_is_ancestor, inode2_is_ancestor;
1141 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
1142 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
1143
1144 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
1145 (unsigned long long)oi2->ip_blkno);
1146
1147 if (*bh1)
1148 *bh1 = NULL;
1149 if (*bh2)
1150 *bh2 = NULL;
1151
1152 /* we always want to lock the one with the lower lockid first.
1153 * and if they are nested, we lock ancestor first */
1154 if (oi1->ip_blkno != oi2->ip_blkno) {
1155 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno,
1156 oi1->ip_blkno);
1157 if (inode1_is_ancestor < 0) {
1158 status = inode1_is_ancestor;
1159 goto bail;
1160 }
1161
1162 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno,
1163 oi2->ip_blkno);
1164 if (inode2_is_ancestor < 0) {
1165 status = inode2_is_ancestor;
1166 goto bail;
1167 }
1168
1169 if ((inode1_is_ancestor == 1) ||
1170 (oi1->ip_blkno < oi2->ip_blkno &&
1171 inode2_is_ancestor == 0)) {
1172 /* switch id1 and id2 around */
1173 swap(bh2, bh1);
1174 swap(inode2, inode1);
1175 }
1176 /* lock id2 */
1177 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1178 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT);
1179 if (status < 0) {
1180 if (status != -ENOENT)
1181 mlog_errno(status);
1182 goto bail;
1183 }
1184 }
1185
1186 /* lock id1 */
1187 status = ocfs2_inode_lock_nested(inode1, bh1, 1,
1188 rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT);
1189 if (status < 0) {
1190 /*
1191 * An error return must mean that no cluster locks
1192 * were held on function exit.
1193 */
1194 if (oi1->ip_blkno != oi2->ip_blkno) {
1195 ocfs2_inode_unlock(inode2, 1);
1196 brelse(*bh2);
1197 *bh2 = NULL;
1198 }
1199
1200 if (status != -ENOENT)
1201 mlog_errno(status);
1202 }
1203
1204 trace_ocfs2_double_lock_end(
1205 (unsigned long long)OCFS2_I(inode1)->ip_blkno,
1206 (unsigned long long)OCFS2_I(inode2)->ip_blkno);
1207
1208 bail:
1209 if (status)
1210 mlog_errno(status);
1211 return status;
1212 }
1213
1214 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1215 {
1216 ocfs2_inode_unlock(inode1, 1);
1217
1218 if (inode1 != inode2)
1219 ocfs2_inode_unlock(inode2, 1);
1220 }
1221
1222 static int ocfs2_rename(struct inode *old_dir,
1223 struct dentry *old_dentry,
1224 struct inode *new_dir,
1225 struct dentry *new_dentry)
1226 {
1227 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1228 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1229 struct inode *old_inode = d_inode(old_dentry);
1230 struct inode *new_inode = d_inode(new_dentry);
1231 struct inode *orphan_dir = NULL;
1232 struct ocfs2_dinode *newfe = NULL;
1233 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1234 struct buffer_head *newfe_bh = NULL;
1235 struct buffer_head *old_inode_bh = NULL;
1236 struct ocfs2_super *osb = NULL;
1237 u64 newfe_blkno, old_de_ino;
1238 handle_t *handle = NULL;
1239 struct buffer_head *old_dir_bh = NULL;
1240 struct buffer_head *new_dir_bh = NULL;
1241 u32 old_dir_nlink = old_dir->i_nlink;
1242 struct ocfs2_dinode *old_di;
1243 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1244 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1245 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1246 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1247 struct ocfs2_dir_lookup_result target_insert = { NULL, };
1248 bool should_add_orphan = false;
1249
1250 /* At some point it might be nice to break this function up a
1251 * bit. */
1252
1253 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1254 old_dentry->d_name.len, old_dentry->d_name.name,
1255 new_dentry->d_name.len, new_dentry->d_name.name);
1256
1257 status = dquot_initialize(old_dir);
1258 if (status) {
1259 mlog_errno(status);
1260 goto bail;
1261 }
1262 status = dquot_initialize(new_dir);
1263 if (status) {
1264 mlog_errno(status);
1265 goto bail;
1266 }
1267
1268 osb = OCFS2_SB(old_dir->i_sb);
1269
1270 if (new_inode) {
1271 if (!igrab(new_inode))
1272 BUG();
1273 }
1274
1275 /* Assume a directory hierarchy thusly:
1276 * a/b/c
1277 * a/d
1278 * a,b,c, and d are all directories.
1279 *
1280 * from cwd of 'a' on both nodes:
1281 * node1: mv b/c d
1282 * node2: mv d b/c
1283 *
1284 * And that's why, just like the VFS, we need a file system
1285 * rename lock. */
1286 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1287 status = ocfs2_rename_lock(osb);
1288 if (status < 0) {
1289 mlog_errno(status);
1290 goto bail;
1291 }
1292 rename_lock = 1;
1293
1294 /* here we cannot guarantee the inodes haven't just been
1295 * changed, so check if they are nested again */
1296 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino,
1297 old_inode->i_ino);
1298 if (status < 0) {
1299 mlog_errno(status);
1300 goto bail;
1301 } else if (status == 1) {
1302 status = -EPERM;
1303 trace_ocfs2_rename_not_permitted(
1304 (unsigned long long)old_inode->i_ino,
1305 (unsigned long long)new_dir->i_ino);
1306 goto bail;
1307 }
1308 }
1309
1310 /* if old and new are the same, this'll just do one lock. */
1311 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1312 &new_dir_bh, new_dir, 1);
1313 if (status < 0) {
1314 mlog_errno(status);
1315 goto bail;
1316 }
1317 parents_locked = 1;
1318
1319 if (!new_dir->i_nlink) {
1320 status = -EACCES;
1321 goto bail;
1322 }
1323
1324 /* make sure both dirs have bhs
1325 * get an extra ref on old_dir_bh if old==new */
1326 if (!new_dir_bh) {
1327 if (old_dir_bh) {
1328 new_dir_bh = old_dir_bh;
1329 get_bh(new_dir_bh);
1330 } else {
1331 mlog(ML_ERROR, "no old_dir_bh!\n");
1332 status = -EIO;
1333 goto bail;
1334 }
1335 }
1336
1337 /*
1338 * Aside from allowing a meta data update, the locking here
1339 * also ensures that the downconvert thread on other nodes
1340 * won't have to concurrently downconvert the inode and the
1341 * dentry locks.
1342 */
1343 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1344 OI_LS_PARENT);
1345 if (status < 0) {
1346 if (status != -ENOENT)
1347 mlog_errno(status);
1348 goto bail;
1349 }
1350 old_child_locked = 1;
1351
1352 status = ocfs2_remote_dentry_delete(old_dentry);
1353 if (status < 0) {
1354 mlog_errno(status);
1355 goto bail;
1356 }
1357
1358 if (S_ISDIR(old_inode->i_mode)) {
1359 u64 old_inode_parent;
1360
1361 update_dot_dot = 1;
1362 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1363 old_inode,
1364 &old_inode_dot_dot_res);
1365 if (status) {
1366 status = -EIO;
1367 goto bail;
1368 }
1369
1370 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1371 status = -EIO;
1372 goto bail;
1373 }
1374
1375 if (!new_inode && new_dir != old_dir &&
1376 new_dir->i_nlink >= ocfs2_link_max(osb)) {
1377 status = -EMLINK;
1378 goto bail;
1379 }
1380 }
1381
1382 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1383 old_dentry->d_name.len,
1384 &old_de_ino);
1385 if (status) {
1386 status = -ENOENT;
1387 goto bail;
1388 }
1389
1390 /*
1391 * Check for inode number is _not_ due to possible IO errors.
1392 * We might rmdir the source, keep it as pwd of some process
1393 * and merrily kill the link to whatever was created under the
1394 * same name. Goodbye sticky bit ;-<
1395 */
1396 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1397 status = -ENOENT;
1398 goto bail;
1399 }
1400
1401 /* check if the target already exists (in which case we need
1402 * to delete it */
1403 status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1404 new_dentry->d_name.len,
1405 &newfe_blkno, new_dir,
1406 &target_lookup_res);
1407 /* The only error we allow here is -ENOENT because the new
1408 * file not existing is perfectly valid. */
1409 if ((status < 0) && (status != -ENOENT)) {
1410 /* If we cannot find the file specified we should just */
1411 /* return the error... */
1412 mlog_errno(status);
1413 goto bail;
1414 }
1415 if (status == 0)
1416 target_exists = 1;
1417
1418 if (!target_exists && new_inode) {
1419 /*
1420 * Target was unlinked by another node while we were
1421 * waiting to get to ocfs2_rename(). There isn't
1422 * anything we can do here to help the situation, so
1423 * bubble up the appropriate error.
1424 */
1425 status = -ENOENT;
1426 goto bail;
1427 }
1428
1429 /* In case we need to overwrite an existing file, we blow it
1430 * away first */
1431 if (target_exists) {
1432 /* VFS didn't think there existed an inode here, but
1433 * someone else in the cluster must have raced our
1434 * rename to create one. Today we error cleanly, in
1435 * the future we should consider calling iget to build
1436 * a new struct inode for this entry. */
1437 if (!new_inode) {
1438 status = -EACCES;
1439
1440 trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1441 new_dentry->d_name.name);
1442 goto bail;
1443 }
1444
1445 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1446 status = -EACCES;
1447
1448 trace_ocfs2_rename_disagree(
1449 (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1450 (unsigned long long)newfe_blkno,
1451 OCFS2_I(new_inode)->ip_flags);
1452 goto bail;
1453 }
1454
1455 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1456 if (status < 0) {
1457 if (status != -ENOENT)
1458 mlog_errno(status);
1459 goto bail;
1460 }
1461 new_child_locked = 1;
1462
1463 status = ocfs2_remote_dentry_delete(new_dentry);
1464 if (status < 0) {
1465 mlog_errno(status);
1466 goto bail;
1467 }
1468
1469 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1470
1471 trace_ocfs2_rename_over_existing(
1472 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1473 (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1474
1475 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1476 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1477 OCFS2_I(new_inode)->ip_blkno,
1478 orphan_name, &orphan_insert,
1479 false);
1480 if (status < 0) {
1481 mlog_errno(status);
1482 goto bail;
1483 }
1484 should_add_orphan = true;
1485 }
1486 } else {
1487 BUG_ON(d_inode(new_dentry->d_parent) != new_dir);
1488
1489 status = ocfs2_check_dir_for_entry(new_dir,
1490 new_dentry->d_name.name,
1491 new_dentry->d_name.len);
1492 if (status)
1493 goto bail;
1494
1495 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1496 new_dentry->d_name.name,
1497 new_dentry->d_name.len,
1498 &target_insert);
1499 if (status < 0) {
1500 mlog_errno(status);
1501 goto bail;
1502 }
1503 }
1504
1505 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1506 if (IS_ERR(handle)) {
1507 status = PTR_ERR(handle);
1508 handle = NULL;
1509 mlog_errno(status);
1510 goto bail;
1511 }
1512
1513 if (target_exists) {
1514 if (S_ISDIR(new_inode->i_mode)) {
1515 if (new_inode->i_nlink != 2 ||
1516 !ocfs2_empty_dir(new_inode)) {
1517 status = -ENOTEMPTY;
1518 goto bail;
1519 }
1520 }
1521 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1522 newfe_bh,
1523 OCFS2_JOURNAL_ACCESS_WRITE);
1524 if (status < 0) {
1525 mlog_errno(status);
1526 goto bail;
1527 }
1528
1529 /* change the dirent to point to the correct inode */
1530 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1531 old_inode);
1532 if (status < 0) {
1533 mlog_errno(status);
1534 goto bail;
1535 }
1536 new_dir->i_version++;
1537
1538 if (S_ISDIR(new_inode->i_mode))
1539 ocfs2_set_links_count(newfe, 0);
1540 else
1541 ocfs2_add_links_count(newfe, -1);
1542 ocfs2_journal_dirty(handle, newfe_bh);
1543 if (should_add_orphan) {
1544 status = ocfs2_orphan_add(osb, handle, new_inode,
1545 newfe_bh, orphan_name,
1546 &orphan_insert, orphan_dir, false);
1547 if (status < 0) {
1548 mlog_errno(status);
1549 goto bail;
1550 }
1551 }
1552 } else {
1553 /* if the name was not found in new_dir, add it now */
1554 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1555 OCFS2_I(old_inode)->ip_blkno,
1556 new_dir_bh, &target_insert);
1557 }
1558
1559 old_inode->i_ctime = CURRENT_TIME;
1560 mark_inode_dirty(old_inode);
1561
1562 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1563 old_inode_bh,
1564 OCFS2_JOURNAL_ACCESS_WRITE);
1565 if (status >= 0) {
1566 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1567
1568 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1569 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1570 ocfs2_journal_dirty(handle, old_inode_bh);
1571 } else
1572 mlog_errno(status);
1573
1574 /*
1575 * Now that the name has been added to new_dir, remove the old name.
1576 *
1577 * We don't keep any directory entry context around until now
1578 * because the insert might have changed the type of directory
1579 * we're dealing with.
1580 */
1581 status = ocfs2_find_entry(old_dentry->d_name.name,
1582 old_dentry->d_name.len, old_dir,
1583 &old_entry_lookup);
1584 if (status) {
1585 if (!is_journal_aborted(osb->journal->j_journal)) {
1586 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1587 "is not deleted.",
1588 new_dentry->d_name.len, new_dentry->d_name.name,
1589 old_dentry->d_name.len, old_dentry->d_name.name);
1590 }
1591 goto bail;
1592 }
1593
1594 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1595 if (status < 0) {
1596 mlog_errno(status);
1597 if (!is_journal_aborted(osb->journal->j_journal)) {
1598 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1599 "is not deleted.",
1600 new_dentry->d_name.len, new_dentry->d_name.name,
1601 old_dentry->d_name.len, old_dentry->d_name.name);
1602 }
1603 goto bail;
1604 }
1605
1606 if (new_inode) {
1607 drop_nlink(new_inode);
1608 new_inode->i_ctime = CURRENT_TIME;
1609 }
1610 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1611
1612 if (update_dot_dot) {
1613 status = ocfs2_update_entry(old_inode, handle,
1614 &old_inode_dot_dot_res, new_dir);
1615 drop_nlink(old_dir);
1616 if (new_inode) {
1617 drop_nlink(new_inode);
1618 } else {
1619 inc_nlink(new_dir);
1620 mark_inode_dirty(new_dir);
1621 }
1622 }
1623 mark_inode_dirty(old_dir);
1624 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1625 if (new_inode) {
1626 mark_inode_dirty(new_inode);
1627 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1628 }
1629
1630 if (old_dir != new_dir) {
1631 /* Keep the same times on both directories.*/
1632 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1633
1634 /*
1635 * This will also pick up the i_nlink change from the
1636 * block above.
1637 */
1638 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1639 }
1640
1641 if (old_dir_nlink != old_dir->i_nlink) {
1642 if (!old_dir_bh) {
1643 mlog(ML_ERROR, "need to change nlink for old dir "
1644 "%llu from %d to %d but bh is NULL!\n",
1645 (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1646 (int)old_dir_nlink, old_dir->i_nlink);
1647 } else {
1648 struct ocfs2_dinode *fe;
1649 status = ocfs2_journal_access_di(handle,
1650 INODE_CACHE(old_dir),
1651 old_dir_bh,
1652 OCFS2_JOURNAL_ACCESS_WRITE);
1653 fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1654 ocfs2_set_links_count(fe, old_dir->i_nlink);
1655 ocfs2_journal_dirty(handle, old_dir_bh);
1656 }
1657 }
1658 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1659 status = 0;
1660 bail:
1661 if (handle)
1662 ocfs2_commit_trans(osb, handle);
1663
1664 if (orphan_dir) {
1665 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1666 ocfs2_inode_unlock(orphan_dir, 1);
1667 mutex_unlock(&orphan_dir->i_mutex);
1668 iput(orphan_dir);
1669 }
1670
1671 if (new_child_locked)
1672 ocfs2_inode_unlock(new_inode, 1);
1673
1674 if (old_child_locked)
1675 ocfs2_inode_unlock(old_inode, 1);
1676
1677 if (parents_locked)
1678 ocfs2_double_unlock(old_dir, new_dir);
1679
1680 if (rename_lock)
1681 ocfs2_rename_unlock(osb);
1682
1683 if (new_inode)
1684 sync_mapping_buffers(old_inode->i_mapping);
1685
1686 if (new_inode)
1687 iput(new_inode);
1688
1689 ocfs2_free_dir_lookup_result(&target_lookup_res);
1690 ocfs2_free_dir_lookup_result(&old_entry_lookup);
1691 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1692 ocfs2_free_dir_lookup_result(&orphan_insert);
1693 ocfs2_free_dir_lookup_result(&target_insert);
1694
1695 brelse(newfe_bh);
1696 brelse(old_inode_bh);
1697 brelse(old_dir_bh);
1698 brelse(new_dir_bh);
1699
1700 if (status)
1701 mlog_errno(status);
1702
1703 return status;
1704 }
1705
1706 /*
1707 * we expect i_size = strlen(symname). Copy symname into the file
1708 * data, including the null terminator.
1709 */
1710 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1711 handle_t *handle,
1712 struct inode *inode,
1713 const char *symname)
1714 {
1715 struct buffer_head **bhs = NULL;
1716 const char *c;
1717 struct super_block *sb = osb->sb;
1718 u64 p_blkno, p_blocks;
1719 int virtual, blocks, status, i, bytes_left;
1720
1721 bytes_left = i_size_read(inode) + 1;
1722 /* we can't trust i_blocks because we're actually going to
1723 * write i_size + 1 bytes. */
1724 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1725
1726 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1727 i_size_read(inode), blocks);
1728
1729 /* Sanity check -- make sure we're going to fit. */
1730 if (bytes_left >
1731 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1732 status = -EIO;
1733 mlog_errno(status);
1734 goto bail;
1735 }
1736
1737 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1738 if (!bhs) {
1739 status = -ENOMEM;
1740 mlog_errno(status);
1741 goto bail;
1742 }
1743
1744 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1745 NULL);
1746 if (status < 0) {
1747 mlog_errno(status);
1748 goto bail;
1749 }
1750
1751 /* links can never be larger than one cluster so we know this
1752 * is all going to be contiguous, but do a sanity check
1753 * anyway. */
1754 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1755 status = -EIO;
1756 mlog_errno(status);
1757 goto bail;
1758 }
1759
1760 virtual = 0;
1761 while(bytes_left > 0) {
1762 c = &symname[virtual * sb->s_blocksize];
1763
1764 bhs[virtual] = sb_getblk(sb, p_blkno);
1765 if (!bhs[virtual]) {
1766 status = -ENOMEM;
1767 mlog_errno(status);
1768 goto bail;
1769 }
1770 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1771 bhs[virtual]);
1772
1773 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1774 bhs[virtual],
1775 OCFS2_JOURNAL_ACCESS_CREATE);
1776 if (status < 0) {
1777 mlog_errno(status);
1778 goto bail;
1779 }
1780
1781 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1782
1783 memcpy(bhs[virtual]->b_data, c,
1784 (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1785 bytes_left);
1786
1787 ocfs2_journal_dirty(handle, bhs[virtual]);
1788
1789 virtual++;
1790 p_blkno++;
1791 bytes_left -= sb->s_blocksize;
1792 }
1793
1794 status = 0;
1795 bail:
1796
1797 if (bhs) {
1798 for(i = 0; i < blocks; i++)
1799 brelse(bhs[i]);
1800 kfree(bhs);
1801 }
1802
1803 if (status)
1804 mlog_errno(status);
1805 return status;
1806 }
1807
1808 static int ocfs2_symlink(struct inode *dir,
1809 struct dentry *dentry,
1810 const char *symname)
1811 {
1812 int status, l, credits;
1813 u64 newsize;
1814 struct ocfs2_super *osb = NULL;
1815 struct inode *inode = NULL;
1816 struct super_block *sb;
1817 struct buffer_head *new_fe_bh = NULL;
1818 struct buffer_head *parent_fe_bh = NULL;
1819 struct ocfs2_dinode *fe = NULL;
1820 struct ocfs2_dinode *dirfe;
1821 handle_t *handle = NULL;
1822 struct ocfs2_alloc_context *inode_ac = NULL;
1823 struct ocfs2_alloc_context *data_ac = NULL;
1824 struct ocfs2_alloc_context *xattr_ac = NULL;
1825 int want_clusters = 0;
1826 int xattr_credits = 0;
1827 struct ocfs2_security_xattr_info si = {
1828 .enable = 1,
1829 };
1830 int did_quota = 0, did_quota_inode = 0;
1831 struct ocfs2_dir_lookup_result lookup = { NULL, };
1832 sigset_t oldset;
1833 int did_block_signals = 0;
1834 struct ocfs2_dentry_lock *dl = NULL;
1835
1836 trace_ocfs2_symlink_begin(dir, dentry, symname,
1837 dentry->d_name.len, dentry->d_name.name);
1838
1839 status = dquot_initialize(dir);
1840 if (status) {
1841 mlog_errno(status);
1842 goto bail;
1843 }
1844
1845 sb = dir->i_sb;
1846 osb = OCFS2_SB(sb);
1847
1848 l = strlen(symname) + 1;
1849
1850 credits = ocfs2_calc_symlink_credits(sb);
1851
1852 /* lock the parent directory */
1853 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1854 if (status < 0) {
1855 if (status != -ENOENT)
1856 mlog_errno(status);
1857 return status;
1858 }
1859
1860 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1861 if (!ocfs2_read_links_count(dirfe)) {
1862 /* can't make a file in a deleted directory. */
1863 status = -ENOENT;
1864 goto bail;
1865 }
1866
1867 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1868 dentry->d_name.len);
1869 if (status)
1870 goto bail;
1871
1872 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1873 dentry->d_name.name,
1874 dentry->d_name.len, &lookup);
1875 if (status < 0) {
1876 mlog_errno(status);
1877 goto bail;
1878 }
1879
1880 status = ocfs2_reserve_new_inode(osb, &inode_ac);
1881 if (status < 0) {
1882 if (status != -ENOSPC)
1883 mlog_errno(status);
1884 goto bail;
1885 }
1886
1887 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1888 if (IS_ERR(inode)) {
1889 status = PTR_ERR(inode);
1890 inode = NULL;
1891 mlog_errno(status);
1892 goto bail;
1893 }
1894
1895 /* get security xattr */
1896 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1897 if (status) {
1898 if (status == -EOPNOTSUPP)
1899 si.enable = 0;
1900 else {
1901 mlog_errno(status);
1902 goto bail;
1903 }
1904 }
1905
1906 /* calculate meta data/clusters for setting security xattr */
1907 if (si.enable) {
1908 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1909 &xattr_credits, &xattr_ac);
1910 if (status < 0) {
1911 mlog_errno(status);
1912 goto bail;
1913 }
1914 }
1915
1916 /* don't reserve bitmap space for fast symlinks. */
1917 if (l > ocfs2_fast_symlink_chars(sb))
1918 want_clusters += 1;
1919
1920 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1921 if (status < 0) {
1922 if (status != -ENOSPC)
1923 mlog_errno(status);
1924 goto bail;
1925 }
1926
1927 handle = ocfs2_start_trans(osb, credits + xattr_credits);
1928 if (IS_ERR(handle)) {
1929 status = PTR_ERR(handle);
1930 handle = NULL;
1931 mlog_errno(status);
1932 goto bail;
1933 }
1934
1935 /* Starting to change things, restart is no longer possible. */
1936 ocfs2_block_signals(&oldset);
1937 did_block_signals = 1;
1938
1939 status = dquot_alloc_inode(inode);
1940 if (status)
1941 goto bail;
1942 did_quota_inode = 1;
1943
1944 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1945 dentry->d_name.name,
1946 (unsigned long long)OCFS2_I(dir)->ip_blkno,
1947 inode->i_mode);
1948
1949 status = ocfs2_mknod_locked(osb, dir, inode,
1950 0, &new_fe_bh, parent_fe_bh, handle,
1951 inode_ac);
1952 if (status < 0) {
1953 mlog_errno(status);
1954 goto bail;
1955 }
1956
1957 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1958 inode->i_rdev = 0;
1959 newsize = l - 1;
1960 inode->i_op = &ocfs2_symlink_inode_operations;
1961 inode_nohighmem(inode);
1962 if (l > ocfs2_fast_symlink_chars(sb)) {
1963 u32 offset = 0;
1964
1965 status = dquot_alloc_space_nodirty(inode,
1966 ocfs2_clusters_to_bytes(osb->sb, 1));
1967 if (status)
1968 goto bail;
1969 did_quota = 1;
1970 inode->i_mapping->a_ops = &ocfs2_aops;
1971 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1972 new_fe_bh,
1973 handle, data_ac, NULL,
1974 NULL);
1975 if (status < 0) {
1976 if (status != -ENOSPC && status != -EINTR) {
1977 mlog(ML_ERROR,
1978 "Failed to extend file to %llu\n",
1979 (unsigned long long)newsize);
1980 mlog_errno(status);
1981 status = -ENOSPC;
1982 }
1983 goto bail;
1984 }
1985 i_size_write(inode, newsize);
1986 inode->i_blocks = ocfs2_inode_sector_count(inode);
1987 } else {
1988 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1989 memcpy((char *) fe->id2.i_symlink, symname, l);
1990 i_size_write(inode, newsize);
1991 inode->i_blocks = 0;
1992 }
1993
1994 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1995 if (status < 0) {
1996 mlog_errno(status);
1997 goto bail;
1998 }
1999
2000 if (!ocfs2_inode_is_fast_symlink(inode)) {
2001 status = ocfs2_create_symlink_data(osb, handle, inode,
2002 symname);
2003 if (status < 0) {
2004 mlog_errno(status);
2005 goto bail;
2006 }
2007 }
2008
2009 if (si.enable) {
2010 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
2011 xattr_ac, data_ac);
2012 if (status < 0) {
2013 mlog_errno(status);
2014 goto bail;
2015 }
2016 }
2017
2018 /*
2019 * Do this before adding the entry to the directory. We add
2020 * also set d_op after success so that ->d_iput() will cleanup
2021 * the dentry lock even if ocfs2_add_entry() fails below.
2022 */
2023 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
2024 if (status) {
2025 mlog_errno(status);
2026 goto bail;
2027 }
2028
2029 dl = dentry->d_fsdata;
2030
2031 status = ocfs2_add_entry(handle, dentry, inode,
2032 le64_to_cpu(fe->i_blkno), parent_fe_bh,
2033 &lookup);
2034 if (status < 0) {
2035 mlog_errno(status);
2036 goto bail;
2037 }
2038
2039 insert_inode_hash(inode);
2040 d_instantiate(dentry, inode);
2041 bail:
2042 if (status < 0 && did_quota)
2043 dquot_free_space_nodirty(inode,
2044 ocfs2_clusters_to_bytes(osb->sb, 1));
2045 if (status < 0 && did_quota_inode)
2046 dquot_free_inode(inode);
2047 if (handle)
2048 ocfs2_commit_trans(osb, handle);
2049
2050 ocfs2_inode_unlock(dir, 1);
2051 if (did_block_signals)
2052 ocfs2_unblock_signals(&oldset);
2053
2054 brelse(new_fe_bh);
2055 brelse(parent_fe_bh);
2056 kfree(si.value);
2057 ocfs2_free_dir_lookup_result(&lookup);
2058 if (inode_ac)
2059 ocfs2_free_alloc_context(inode_ac);
2060 if (data_ac)
2061 ocfs2_free_alloc_context(data_ac);
2062 if (xattr_ac)
2063 ocfs2_free_alloc_context(xattr_ac);
2064 if ((status < 0) && inode) {
2065 if (dl)
2066 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2067
2068 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
2069 clear_nlink(inode);
2070 iput(inode);
2071 }
2072
2073 if (status)
2074 mlog_errno(status);
2075
2076 return status;
2077 }
2078
2079 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2080 {
2081 int status, namelen;
2082
2083 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2084 (long long)blkno);
2085 if (namelen <= 0) {
2086 if (namelen)
2087 status = namelen;
2088 else
2089 status = -EINVAL;
2090 mlog_errno(status);
2091 goto bail;
2092 }
2093 if (namelen != OCFS2_ORPHAN_NAMELEN) {
2094 status = -EINVAL;
2095 mlog_errno(status);
2096 goto bail;
2097 }
2098
2099 trace_ocfs2_blkno_stringify(blkno, name, namelen);
2100
2101 status = 0;
2102 bail:
2103 if (status < 0)
2104 mlog_errno(status);
2105 return status;
2106 }
2107
2108 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2109 struct inode **ret_orphan_dir,
2110 struct buffer_head **ret_orphan_dir_bh)
2111 {
2112 struct inode *orphan_dir_inode;
2113 struct buffer_head *orphan_dir_bh = NULL;
2114 int ret = 0;
2115
2116 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2117 ORPHAN_DIR_SYSTEM_INODE,
2118 osb->slot_num);
2119 if (!orphan_dir_inode) {
2120 ret = -ENOENT;
2121 mlog_errno(ret);
2122 return ret;
2123 }
2124
2125 mutex_lock(&orphan_dir_inode->i_mutex);
2126
2127 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2128 if (ret < 0) {
2129 mutex_unlock(&orphan_dir_inode->i_mutex);
2130 iput(orphan_dir_inode);
2131
2132 mlog_errno(ret);
2133 return ret;
2134 }
2135
2136 *ret_orphan_dir = orphan_dir_inode;
2137 *ret_orphan_dir_bh = orphan_dir_bh;
2138
2139 return 0;
2140 }
2141
2142 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2143 struct buffer_head *orphan_dir_bh,
2144 u64 blkno,
2145 char *name,
2146 struct ocfs2_dir_lookup_result *lookup,
2147 bool dio)
2148 {
2149 int ret;
2150 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2151 int namelen = dio ?
2152 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2153 OCFS2_ORPHAN_NAMELEN;
2154
2155 if (dio) {
2156 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2157 OCFS2_DIO_ORPHAN_PREFIX);
2158 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2159 ret = -EINVAL;
2160 mlog_errno(ret);
2161 return ret;
2162 }
2163
2164 ret = ocfs2_blkno_stringify(blkno,
2165 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2166 } else
2167 ret = ocfs2_blkno_stringify(blkno, name);
2168 if (ret < 0) {
2169 mlog_errno(ret);
2170 return ret;
2171 }
2172
2173 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2174 orphan_dir_bh, name,
2175 namelen, lookup);
2176 if (ret < 0) {
2177 mlog_errno(ret);
2178 return ret;
2179 }
2180
2181 return 0;
2182 }
2183
2184 /**
2185 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2186 * insertion of an orphan.
2187 * @osb: ocfs2 file system
2188 * @ret_orphan_dir: Orphan dir inode - returned locked!
2189 * @blkno: Actual block number of the inode to be inserted into orphan dir.
2190 * @lookup: dir lookup result, to be passed back into functions like
2191 * ocfs2_orphan_add
2192 *
2193 * Returns zero on success and the ret_orphan_dir, name and lookup
2194 * fields will be populated.
2195 *
2196 * Returns non-zero on failure.
2197 */
2198 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2199 struct inode **ret_orphan_dir,
2200 u64 blkno,
2201 char *name,
2202 struct ocfs2_dir_lookup_result *lookup,
2203 bool dio)
2204 {
2205 struct inode *orphan_dir_inode = NULL;
2206 struct buffer_head *orphan_dir_bh = NULL;
2207 int ret = 0;
2208
2209 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2210 &orphan_dir_bh);
2211 if (ret < 0) {
2212 mlog_errno(ret);
2213 return ret;
2214 }
2215
2216 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2217 blkno, name, lookup, dio);
2218 if (ret < 0) {
2219 mlog_errno(ret);
2220 goto out;
2221 }
2222
2223 *ret_orphan_dir = orphan_dir_inode;
2224
2225 out:
2226 brelse(orphan_dir_bh);
2227
2228 if (ret) {
2229 ocfs2_inode_unlock(orphan_dir_inode, 1);
2230 mutex_unlock(&orphan_dir_inode->i_mutex);
2231 iput(orphan_dir_inode);
2232 }
2233
2234 if (ret)
2235 mlog_errno(ret);
2236 return ret;
2237 }
2238
2239 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2240 handle_t *handle,
2241 struct inode *inode,
2242 struct buffer_head *fe_bh,
2243 char *name,
2244 struct ocfs2_dir_lookup_result *lookup,
2245 struct inode *orphan_dir_inode,
2246 bool dio)
2247 {
2248 struct buffer_head *orphan_dir_bh = NULL;
2249 int status = 0;
2250 struct ocfs2_dinode *orphan_fe;
2251 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2252 int namelen = dio ?
2253 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2254 OCFS2_ORPHAN_NAMELEN;
2255
2256 trace_ocfs2_orphan_add_begin(
2257 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2258
2259 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2260 if (status < 0) {
2261 mlog_errno(status);
2262 goto leave;
2263 }
2264
2265 status = ocfs2_journal_access_di(handle,
2266 INODE_CACHE(orphan_dir_inode),
2267 orphan_dir_bh,
2268 OCFS2_JOURNAL_ACCESS_WRITE);
2269 if (status < 0) {
2270 mlog_errno(status);
2271 goto leave;
2272 }
2273
2274 /*
2275 * We're going to journal the change of i_flags and i_orphaned_slot.
2276 * It's safe anyway, though some callers may duplicate the journaling.
2277 * Journaling within the func just make the logic look more
2278 * straightforward.
2279 */
2280 status = ocfs2_journal_access_di(handle,
2281 INODE_CACHE(inode),
2282 fe_bh,
2283 OCFS2_JOURNAL_ACCESS_WRITE);
2284 if (status < 0) {
2285 mlog_errno(status);
2286 goto leave;
2287 }
2288
2289 /* we're a cluster, and nlink can change on disk from
2290 * underneath us... */
2291 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2292 if (S_ISDIR(inode->i_mode))
2293 ocfs2_add_links_count(orphan_fe, 1);
2294 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2295 ocfs2_journal_dirty(handle, orphan_dir_bh);
2296
2297 status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2298 namelen, inode,
2299 OCFS2_I(inode)->ip_blkno,
2300 orphan_dir_bh, lookup);
2301 if (status < 0) {
2302 mlog_errno(status);
2303 goto rollback;
2304 }
2305
2306 if (dio) {
2307 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan
2308 * slot.
2309 */
2310 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2311 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num);
2312 } else {
2313 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2314 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2315
2316 /* Record which orphan dir our inode now resides
2317 * in. delete_inode will use this to determine which orphan
2318 * dir to lock. */
2319 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2320 }
2321
2322 ocfs2_journal_dirty(handle, fe_bh);
2323
2324 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2325 osb->slot_num);
2326
2327 rollback:
2328 if (status < 0) {
2329 if (S_ISDIR(inode->i_mode))
2330 ocfs2_add_links_count(orphan_fe, -1);
2331 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2332 }
2333
2334 leave:
2335 brelse(orphan_dir_bh);
2336
2337 return status;
2338 }
2339
2340 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2341 int ocfs2_orphan_del(struct ocfs2_super *osb,
2342 handle_t *handle,
2343 struct inode *orphan_dir_inode,
2344 struct inode *inode,
2345 struct buffer_head *orphan_dir_bh,
2346 bool dio)
2347 {
2348 const int namelen = OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN;
2349 char name[namelen + 1];
2350 struct ocfs2_dinode *orphan_fe;
2351 int status = 0;
2352 struct ocfs2_dir_lookup_result lookup = { NULL, };
2353
2354 if (dio) {
2355 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2356 OCFS2_DIO_ORPHAN_PREFIX);
2357 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2358 status = -EINVAL;
2359 mlog_errno(status);
2360 return status;
2361 }
2362
2363 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno,
2364 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2365 } else
2366 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2367 if (status < 0) {
2368 mlog_errno(status);
2369 goto leave;
2370 }
2371
2372 trace_ocfs2_orphan_del(
2373 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2374 name, strlen(name));
2375
2376 /* find it's spot in the orphan directory */
2377 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode,
2378 &lookup);
2379 if (status) {
2380 mlog_errno(status);
2381 goto leave;
2382 }
2383
2384 /* remove it from the orphan directory */
2385 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2386 if (status < 0) {
2387 mlog_errno(status);
2388 goto leave;
2389 }
2390
2391 status = ocfs2_journal_access_di(handle,
2392 INODE_CACHE(orphan_dir_inode),
2393 orphan_dir_bh,
2394 OCFS2_JOURNAL_ACCESS_WRITE);
2395 if (status < 0) {
2396 mlog_errno(status);
2397 goto leave;
2398 }
2399
2400 /* do the i_nlink dance! :) */
2401 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2402 if (S_ISDIR(inode->i_mode))
2403 ocfs2_add_links_count(orphan_fe, -1);
2404 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2405 ocfs2_journal_dirty(handle, orphan_dir_bh);
2406
2407 leave:
2408 ocfs2_free_dir_lookup_result(&lookup);
2409
2410 if (status)
2411 mlog_errno(status);
2412 return status;
2413 }
2414
2415 /**
2416 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2417 * allocated file. This is different from the typical 'add to orphan dir'
2418 * operation in that the inode does not yet exist. This is a problem because
2419 * the orphan dir stringifies the inode block number to come up with it's
2420 * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2421 * problem. This function works around it by calling deeper into the orphan
2422 * and suballoc code than other callers. Use this only by necessity.
2423 * @dir: The directory which this inode will ultimately wind up under - not the
2424 * orphan dir!
2425 * @dir_bh: buffer_head the @dir inode block
2426 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2427 * with the string to be used for orphan dirent. Pass back to the orphan dir
2428 * code.
2429 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2430 * dir code.
2431 * @ret_di_blkno: block number where the new inode will be allocated.
2432 * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2433 * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2434 *
2435 * Returns zero on success and the ret_orphan_dir, name and lookup
2436 * fields will be populated.
2437 *
2438 * Returns non-zero on failure.
2439 */
2440 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2441 struct buffer_head *dir_bh,
2442 char *orphan_name,
2443 struct inode **ret_orphan_dir,
2444 u64 *ret_di_blkno,
2445 struct ocfs2_dir_lookup_result *orphan_insert,
2446 struct ocfs2_alloc_context **ret_inode_ac)
2447 {
2448 int ret;
2449 u64 di_blkno;
2450 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2451 struct inode *orphan_dir = NULL;
2452 struct buffer_head *orphan_dir_bh = NULL;
2453 struct ocfs2_alloc_context *inode_ac = NULL;
2454
2455 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2456 if (ret < 0) {
2457 mlog_errno(ret);
2458 return ret;
2459 }
2460
2461 /* reserve an inode spot */
2462 ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2463 if (ret < 0) {
2464 if (ret != -ENOSPC)
2465 mlog_errno(ret);
2466 goto out;
2467 }
2468
2469 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2470 &di_blkno);
2471 if (ret) {
2472 mlog_errno(ret);
2473 goto out;
2474 }
2475
2476 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2477 di_blkno, orphan_name, orphan_insert,
2478 false);
2479 if (ret < 0) {
2480 mlog_errno(ret);
2481 goto out;
2482 }
2483
2484 out:
2485 if (ret == 0) {
2486 *ret_orphan_dir = orphan_dir;
2487 *ret_di_blkno = di_blkno;
2488 *ret_inode_ac = inode_ac;
2489 /*
2490 * orphan_name and orphan_insert are already up to
2491 * date via prepare_orphan_dir
2492 */
2493 } else {
2494 /* Unroll reserve_new_inode* */
2495 if (inode_ac)
2496 ocfs2_free_alloc_context(inode_ac);
2497
2498 /* Unroll orphan dir locking */
2499 mutex_unlock(&orphan_dir->i_mutex);
2500 ocfs2_inode_unlock(orphan_dir, 1);
2501 iput(orphan_dir);
2502 }
2503
2504 brelse(orphan_dir_bh);
2505
2506 return ret;
2507 }
2508
2509 int ocfs2_create_inode_in_orphan(struct inode *dir,
2510 int mode,
2511 struct inode **new_inode)
2512 {
2513 int status, did_quota_inode = 0;
2514 struct inode *inode = NULL;
2515 struct inode *orphan_dir = NULL;
2516 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2517 struct ocfs2_dinode *di = NULL;
2518 handle_t *handle = NULL;
2519 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2520 struct buffer_head *parent_di_bh = NULL;
2521 struct buffer_head *new_di_bh = NULL;
2522 struct ocfs2_alloc_context *inode_ac = NULL;
2523 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2524 u64 uninitialized_var(di_blkno), suballoc_loc;
2525 u16 suballoc_bit;
2526
2527 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2528 if (status < 0) {
2529 if (status != -ENOENT)
2530 mlog_errno(status);
2531 return status;
2532 }
2533
2534 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2535 orphan_name, &orphan_dir,
2536 &di_blkno, &orphan_insert, &inode_ac);
2537 if (status < 0) {
2538 if (status != -ENOSPC)
2539 mlog_errno(status);
2540 goto leave;
2541 }
2542
2543 inode = ocfs2_get_init_inode(dir, mode);
2544 if (IS_ERR(inode)) {
2545 status = PTR_ERR(inode);
2546 inode = NULL;
2547 mlog_errno(status);
2548 goto leave;
2549 }
2550
2551 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2552 if (IS_ERR(handle)) {
2553 status = PTR_ERR(handle);
2554 handle = NULL;
2555 mlog_errno(status);
2556 goto leave;
2557 }
2558
2559 status = dquot_alloc_inode(inode);
2560 if (status)
2561 goto leave;
2562 did_quota_inode = 1;
2563
2564 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2565 &suballoc_loc,
2566 &suballoc_bit, di_blkno);
2567 if (status < 0) {
2568 mlog_errno(status);
2569 goto leave;
2570 }
2571
2572 clear_nlink(inode);
2573 /* do the real work now. */
2574 status = __ocfs2_mknod_locked(dir, inode,
2575 0, &new_di_bh, parent_di_bh, handle,
2576 inode_ac, di_blkno, suballoc_loc,
2577 suballoc_bit);
2578 if (status < 0) {
2579 mlog_errno(status);
2580 goto leave;
2581 }
2582
2583 di = (struct ocfs2_dinode *)new_di_bh->b_data;
2584 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2585 &orphan_insert, orphan_dir, false);
2586 if (status < 0) {
2587 mlog_errno(status);
2588 goto leave;
2589 }
2590
2591 /* get open lock so that only nodes can't remove it from orphan dir. */
2592 status = ocfs2_open_lock(inode);
2593 if (status < 0)
2594 mlog_errno(status);
2595
2596 insert_inode_hash(inode);
2597 leave:
2598 if (status < 0 && did_quota_inode)
2599 dquot_free_inode(inode);
2600 if (handle)
2601 ocfs2_commit_trans(osb, handle);
2602
2603 if (orphan_dir) {
2604 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2605 ocfs2_inode_unlock(orphan_dir, 1);
2606 mutex_unlock(&orphan_dir->i_mutex);
2607 iput(orphan_dir);
2608 }
2609
2610 if ((status < 0) && inode) {
2611 clear_nlink(inode);
2612 iput(inode);
2613 }
2614
2615 if (inode_ac)
2616 ocfs2_free_alloc_context(inode_ac);
2617
2618 brelse(new_di_bh);
2619
2620 if (!status)
2621 *new_inode = inode;
2622
2623 ocfs2_free_dir_lookup_result(&orphan_insert);
2624
2625 ocfs2_inode_unlock(dir, 1);
2626 brelse(parent_di_bh);
2627 return status;
2628 }
2629
2630 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
2631 struct inode *inode)
2632 {
2633 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2634 struct inode *orphan_dir_inode = NULL;
2635 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2636 struct buffer_head *di_bh = NULL;
2637 int status = 0;
2638 handle_t *handle = NULL;
2639 struct ocfs2_dinode *di = NULL;
2640
2641 status = ocfs2_inode_lock(inode, &di_bh, 1);
2642 if (status < 0) {
2643 mlog_errno(status);
2644 goto bail;
2645 }
2646
2647 di = (struct ocfs2_dinode *) di_bh->b_data;
2648 /*
2649 * Another append dio crashed?
2650 * If so, manually recover it first.
2651 */
2652 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
2653 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode));
2654 if (status < 0) {
2655 if (status != -ENOSPC)
2656 mlog_errno(status);
2657 goto bail_unlock_inode;
2658 }
2659
2660 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0);
2661 if (status < 0) {
2662 mlog_errno(status);
2663 goto bail_unlock_inode;
2664 }
2665 }
2666
2667 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
2668 OCFS2_I(inode)->ip_blkno,
2669 orphan_name,
2670 &orphan_insert,
2671 true);
2672 if (status < 0) {
2673 mlog_errno(status);
2674 goto bail_unlock_inode;
2675 }
2676
2677 handle = ocfs2_start_trans(osb,
2678 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS);
2679 if (IS_ERR(handle)) {
2680 status = PTR_ERR(handle);
2681 goto bail_unlock_orphan;
2682 }
2683
2684 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
2685 &orphan_insert, orphan_dir_inode, true);
2686 if (status)
2687 mlog_errno(status);
2688
2689 ocfs2_commit_trans(osb, handle);
2690
2691 bail_unlock_orphan:
2692 ocfs2_inode_unlock(orphan_dir_inode, 1);
2693 mutex_unlock(&orphan_dir_inode->i_mutex);
2694 iput(orphan_dir_inode);
2695
2696 ocfs2_free_dir_lookup_result(&orphan_insert);
2697
2698 bail_unlock_inode:
2699 ocfs2_inode_unlock(inode, 1);
2700 brelse(di_bh);
2701
2702 bail:
2703 return status;
2704 }
2705
2706 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
2707 struct inode *inode, struct buffer_head *di_bh,
2708 int update_isize, loff_t end)
2709 {
2710 struct inode *orphan_dir_inode = NULL;
2711 struct buffer_head *orphan_dir_bh = NULL;
2712 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2713 handle_t *handle = NULL;
2714 int status = 0;
2715
2716 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2717 ORPHAN_DIR_SYSTEM_INODE,
2718 le16_to_cpu(di->i_dio_orphaned_slot));
2719 if (!orphan_dir_inode) {
2720 status = -ENOENT;
2721 mlog_errno(status);
2722 goto bail;
2723 }
2724
2725 mutex_lock(&orphan_dir_inode->i_mutex);
2726 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2727 if (status < 0) {
2728 mutex_unlock(&orphan_dir_inode->i_mutex);
2729 iput(orphan_dir_inode);
2730 mlog_errno(status);
2731 goto bail;
2732 }
2733
2734 handle = ocfs2_start_trans(osb,
2735 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS);
2736 if (IS_ERR(handle)) {
2737 status = PTR_ERR(handle);
2738 goto bail_unlock_orphan;
2739 }
2740
2741 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)));
2742
2743 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
2744 inode, orphan_dir_bh, true);
2745 if (status < 0) {
2746 mlog_errno(status);
2747 goto bail_commit;
2748 }
2749
2750 status = ocfs2_journal_access_di(handle,
2751 INODE_CACHE(inode),
2752 di_bh,
2753 OCFS2_JOURNAL_ACCESS_WRITE);
2754 if (status < 0) {
2755 mlog_errno(status);
2756 goto bail_commit;
2757 }
2758
2759 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2760 di->i_dio_orphaned_slot = 0;
2761
2762 if (update_isize) {
2763 status = ocfs2_set_inode_size(handle, inode, di_bh, end);
2764 if (status)
2765 mlog_errno(status);
2766 } else
2767 ocfs2_journal_dirty(handle, di_bh);
2768
2769 bail_commit:
2770 ocfs2_commit_trans(osb, handle);
2771
2772 bail_unlock_orphan:
2773 ocfs2_inode_unlock(orphan_dir_inode, 1);
2774 mutex_unlock(&orphan_dir_inode->i_mutex);
2775 brelse(orphan_dir_bh);
2776 iput(orphan_dir_inode);
2777
2778 bail:
2779 return status;
2780 }
2781
2782 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2783 struct inode *inode,
2784 struct dentry *dentry)
2785 {
2786 int status = 0;
2787 struct buffer_head *parent_di_bh = NULL;
2788 handle_t *handle = NULL;
2789 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2790 struct ocfs2_dinode *dir_di, *di;
2791 struct inode *orphan_dir_inode = NULL;
2792 struct buffer_head *orphan_dir_bh = NULL;
2793 struct buffer_head *di_bh = NULL;
2794 struct ocfs2_dir_lookup_result lookup = { NULL, };
2795
2796 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2797 dentry->d_name.len, dentry->d_name.name,
2798 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2799 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2800
2801 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2802 if (status < 0) {
2803 if (status != -ENOENT)
2804 mlog_errno(status);
2805 return status;
2806 }
2807
2808 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2809 if (!dir_di->i_links_count) {
2810 /* can't make a file in a deleted directory. */
2811 status = -ENOENT;
2812 goto leave;
2813 }
2814
2815 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2816 dentry->d_name.len);
2817 if (status)
2818 goto leave;
2819
2820 /* get a spot inside the dir. */
2821 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2822 dentry->d_name.name,
2823 dentry->d_name.len, &lookup);
2824 if (status < 0) {
2825 mlog_errno(status);
2826 goto leave;
2827 }
2828
2829 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2830 ORPHAN_DIR_SYSTEM_INODE,
2831 osb->slot_num);
2832 if (!orphan_dir_inode) {
2833 status = -ENOENT;
2834 mlog_errno(status);
2835 goto leave;
2836 }
2837
2838 mutex_lock(&orphan_dir_inode->i_mutex);
2839
2840 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2841 if (status < 0) {
2842 mlog_errno(status);
2843 mutex_unlock(&orphan_dir_inode->i_mutex);
2844 iput(orphan_dir_inode);
2845 goto leave;
2846 }
2847
2848 status = ocfs2_read_inode_block(inode, &di_bh);
2849 if (status < 0) {
2850 mlog_errno(status);
2851 goto orphan_unlock;
2852 }
2853
2854 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2855 if (IS_ERR(handle)) {
2856 status = PTR_ERR(handle);
2857 handle = NULL;
2858 mlog_errno(status);
2859 goto orphan_unlock;
2860 }
2861
2862 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2863 di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2864 if (status < 0) {
2865 mlog_errno(status);
2866 goto out_commit;
2867 }
2868
2869 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2870 orphan_dir_bh, false);
2871 if (status < 0) {
2872 mlog_errno(status);
2873 goto out_commit;
2874 }
2875
2876 di = (struct ocfs2_dinode *)di_bh->b_data;
2877 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2878 di->i_orphaned_slot = 0;
2879 set_nlink(inode, 1);
2880 ocfs2_set_links_count(di, inode->i_nlink);
2881 ocfs2_update_inode_fsync_trans(handle, inode, 1);
2882 ocfs2_journal_dirty(handle, di_bh);
2883
2884 status = ocfs2_add_entry(handle, dentry, inode,
2885 OCFS2_I(inode)->ip_blkno, parent_di_bh,
2886 &lookup);
2887 if (status < 0) {
2888 mlog_errno(status);
2889 goto out_commit;
2890 }
2891
2892 status = ocfs2_dentry_attach_lock(dentry, inode,
2893 OCFS2_I(dir)->ip_blkno);
2894 if (status) {
2895 mlog_errno(status);
2896 goto out_commit;
2897 }
2898
2899 d_instantiate(dentry, inode);
2900 status = 0;
2901 out_commit:
2902 ocfs2_commit_trans(osb, handle);
2903 orphan_unlock:
2904 ocfs2_inode_unlock(orphan_dir_inode, 1);
2905 mutex_unlock(&orphan_dir_inode->i_mutex);
2906 iput(orphan_dir_inode);
2907 leave:
2908
2909 ocfs2_inode_unlock(dir, 1);
2910
2911 brelse(di_bh);
2912 brelse(parent_di_bh);
2913 brelse(orphan_dir_bh);
2914
2915 ocfs2_free_dir_lookup_result(&lookup);
2916
2917 if (status)
2918 mlog_errno(status);
2919
2920 return status;
2921 }
2922
2923 const struct inode_operations ocfs2_dir_iops = {
2924 .create = ocfs2_create,
2925 .lookup = ocfs2_lookup,
2926 .link = ocfs2_link,
2927 .unlink = ocfs2_unlink,
2928 .rmdir = ocfs2_unlink,
2929 .symlink = ocfs2_symlink,
2930 .mkdir = ocfs2_mkdir,
2931 .mknod = ocfs2_mknod,
2932 .rename = ocfs2_rename,
2933 .setattr = ocfs2_setattr,
2934 .getattr = ocfs2_getattr,
2935 .permission = ocfs2_permission,
2936 .setxattr = generic_setxattr,
2937 .getxattr = generic_getxattr,
2938 .listxattr = ocfs2_listxattr,
2939 .removexattr = generic_removexattr,
2940 .fiemap = ocfs2_fiemap,
2941 .get_acl = ocfs2_iop_get_acl,
2942 .set_acl = ocfs2_iop_set_acl,
2943 };
Linux with added FPC-III support