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EDAC: i7core, sb_edac: Don't return NOTIFY_BAD from mce_decoder callback
[linux/fpc-iii.git] / fs / ocfs2 / namei.c
blob6b3e87189a6467fd3c72533db5c52d149ba2064d
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 inode_unlock(orphan_dir);
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 inode_unlock(orphan_dir);
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 iput(new_inode);
1687
1688 ocfs2_free_dir_lookup_result(&target_lookup_res);
1689 ocfs2_free_dir_lookup_result(&old_entry_lookup);
1690 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1691 ocfs2_free_dir_lookup_result(&orphan_insert);
1692 ocfs2_free_dir_lookup_result(&target_insert);
1693
1694 brelse(newfe_bh);
1695 brelse(old_inode_bh);
1696 brelse(old_dir_bh);
1697 brelse(new_dir_bh);
1698
1699 if (status)
1700 mlog_errno(status);
1701
1702 return status;
1703 }
1704
1705 /*
1706 * we expect i_size = strlen(symname). Copy symname into the file
1707 * data, including the null terminator.
1708 */
1709 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1710 handle_t *handle,
1711 struct inode *inode,
1712 const char *symname)
1713 {
1714 struct buffer_head **bhs = NULL;
1715 const char *c;
1716 struct super_block *sb = osb->sb;
1717 u64 p_blkno, p_blocks;
1718 int virtual, blocks, status, i, bytes_left;
1719
1720 bytes_left = i_size_read(inode) + 1;
1721 /* we can't trust i_blocks because we're actually going to
1722 * write i_size + 1 bytes. */
1723 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1724
1725 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1726 i_size_read(inode), blocks);
1727
1728 /* Sanity check -- make sure we're going to fit. */
1729 if (bytes_left >
1730 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1731 status = -EIO;
1732 mlog_errno(status);
1733 goto bail;
1734 }
1735
1736 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1737 if (!bhs) {
1738 status = -ENOMEM;
1739 mlog_errno(status);
1740 goto bail;
1741 }
1742
1743 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1744 NULL);
1745 if (status < 0) {
1746 mlog_errno(status);
1747 goto bail;
1748 }
1749
1750 /* links can never be larger than one cluster so we know this
1751 * is all going to be contiguous, but do a sanity check
1752 * anyway. */
1753 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1754 status = -EIO;
1755 mlog_errno(status);
1756 goto bail;
1757 }
1758
1759 virtual = 0;
1760 while(bytes_left > 0) {
1761 c = &symname[virtual * sb->s_blocksize];
1762
1763 bhs[virtual] = sb_getblk(sb, p_blkno);
1764 if (!bhs[virtual]) {
1765 status = -ENOMEM;
1766 mlog_errno(status);
1767 goto bail;
1768 }
1769 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1770 bhs[virtual]);
1771
1772 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1773 bhs[virtual],
1774 OCFS2_JOURNAL_ACCESS_CREATE);
1775 if (status < 0) {
1776 mlog_errno(status);
1777 goto bail;
1778 }
1779
1780 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1781
1782 memcpy(bhs[virtual]->b_data, c,
1783 (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1784 bytes_left);
1785
1786 ocfs2_journal_dirty(handle, bhs[virtual]);
1787
1788 virtual++;
1789 p_blkno++;
1790 bytes_left -= sb->s_blocksize;
1791 }
1792
1793 status = 0;
1794 bail:
1795
1796 if (bhs) {
1797 for(i = 0; i < blocks; i++)
1798 brelse(bhs[i]);
1799 kfree(bhs);
1800 }
1801
1802 if (status)
1803 mlog_errno(status);
1804 return status;
1805 }
1806
1807 static int ocfs2_symlink(struct inode *dir,
1808 struct dentry *dentry,
1809 const char *symname)
1810 {
1811 int status, l, credits;
1812 u64 newsize;
1813 struct ocfs2_super *osb = NULL;
1814 struct inode *inode = NULL;
1815 struct super_block *sb;
1816 struct buffer_head *new_fe_bh = NULL;
1817 struct buffer_head *parent_fe_bh = NULL;
1818 struct ocfs2_dinode *fe = NULL;
1819 struct ocfs2_dinode *dirfe;
1820 handle_t *handle = NULL;
1821 struct ocfs2_alloc_context *inode_ac = NULL;
1822 struct ocfs2_alloc_context *data_ac = NULL;
1823 struct ocfs2_alloc_context *xattr_ac = NULL;
1824 int want_clusters = 0;
1825 int xattr_credits = 0;
1826 struct ocfs2_security_xattr_info si = {
1827 .enable = 1,
1828 };
1829 int did_quota = 0, did_quota_inode = 0;
1830 struct ocfs2_dir_lookup_result lookup = { NULL, };
1831 sigset_t oldset;
1832 int did_block_signals = 0;
1833 struct ocfs2_dentry_lock *dl = NULL;
1834
1835 trace_ocfs2_symlink_begin(dir, dentry, symname,
1836 dentry->d_name.len, dentry->d_name.name);
1837
1838 status = dquot_initialize(dir);
1839 if (status) {
1840 mlog_errno(status);
1841 goto bail;
1842 }
1843
1844 sb = dir->i_sb;
1845 osb = OCFS2_SB(sb);
1846
1847 l = strlen(symname) + 1;
1848
1849 credits = ocfs2_calc_symlink_credits(sb);
1850
1851 /* lock the parent directory */
1852 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1853 if (status < 0) {
1854 if (status != -ENOENT)
1855 mlog_errno(status);
1856 return status;
1857 }
1858
1859 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1860 if (!ocfs2_read_links_count(dirfe)) {
1861 /* can't make a file in a deleted directory. */
1862 status = -ENOENT;
1863 goto bail;
1864 }
1865
1866 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1867 dentry->d_name.len);
1868 if (status)
1869 goto bail;
1870
1871 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1872 dentry->d_name.name,
1873 dentry->d_name.len, &lookup);
1874 if (status < 0) {
1875 mlog_errno(status);
1876 goto bail;
1877 }
1878
1879 status = ocfs2_reserve_new_inode(osb, &inode_ac);
1880 if (status < 0) {
1881 if (status != -ENOSPC)
1882 mlog_errno(status);
1883 goto bail;
1884 }
1885
1886 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1887 if (IS_ERR(inode)) {
1888 status = PTR_ERR(inode);
1889 inode = NULL;
1890 mlog_errno(status);
1891 goto bail;
1892 }
1893
1894 /* get security xattr */
1895 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1896 if (status) {
1897 if (status == -EOPNOTSUPP)
1898 si.enable = 0;
1899 else {
1900 mlog_errno(status);
1901 goto bail;
1902 }
1903 }
1904
1905 /* calculate meta data/clusters for setting security xattr */
1906 if (si.enable) {
1907 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1908 &xattr_credits, &xattr_ac);
1909 if (status < 0) {
1910 mlog_errno(status);
1911 goto bail;
1912 }
1913 }
1914
1915 /* don't reserve bitmap space for fast symlinks. */
1916 if (l > ocfs2_fast_symlink_chars(sb))
1917 want_clusters += 1;
1918
1919 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1920 if (status < 0) {
1921 if (status != -ENOSPC)
1922 mlog_errno(status);
1923 goto bail;
1924 }
1925
1926 handle = ocfs2_start_trans(osb, credits + xattr_credits);
1927 if (IS_ERR(handle)) {
1928 status = PTR_ERR(handle);
1929 handle = NULL;
1930 mlog_errno(status);
1931 goto bail;
1932 }
1933
1934 /* Starting to change things, restart is no longer possible. */
1935 ocfs2_block_signals(&oldset);
1936 did_block_signals = 1;
1937
1938 status = dquot_alloc_inode(inode);
1939 if (status)
1940 goto bail;
1941 did_quota_inode = 1;
1942
1943 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1944 dentry->d_name.name,
1945 (unsigned long long)OCFS2_I(dir)->ip_blkno,
1946 inode->i_mode);
1947
1948 status = ocfs2_mknod_locked(osb, dir, inode,
1949 0, &new_fe_bh, parent_fe_bh, handle,
1950 inode_ac);
1951 if (status < 0) {
1952 mlog_errno(status);
1953 goto bail;
1954 }
1955
1956 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1957 inode->i_rdev = 0;
1958 newsize = l - 1;
1959 inode->i_op = &ocfs2_symlink_inode_operations;
1960 inode_nohighmem(inode);
1961 if (l > ocfs2_fast_symlink_chars(sb)) {
1962 u32 offset = 0;
1963
1964 status = dquot_alloc_space_nodirty(inode,
1965 ocfs2_clusters_to_bytes(osb->sb, 1));
1966 if (status)
1967 goto bail;
1968 did_quota = 1;
1969 inode->i_mapping->a_ops = &ocfs2_aops;
1970 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1971 new_fe_bh,
1972 handle, data_ac, NULL,
1973 NULL);
1974 if (status < 0) {
1975 if (status != -ENOSPC && status != -EINTR) {
1976 mlog(ML_ERROR,
1977 "Failed to extend file to %llu\n",
1978 (unsigned long long)newsize);
1979 mlog_errno(status);
1980 status = -ENOSPC;
1981 }
1982 goto bail;
1983 }
1984 i_size_write(inode, newsize);
1985 inode->i_blocks = ocfs2_inode_sector_count(inode);
1986 } else {
1987 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1988 memcpy((char *) fe->id2.i_symlink, symname, l);
1989 i_size_write(inode, newsize);
1990 inode->i_blocks = 0;
1991 }
1992
1993 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1994 if (status < 0) {
1995 mlog_errno(status);
1996 goto bail;
1997 }
1998
1999 if (!ocfs2_inode_is_fast_symlink(inode)) {
2000 status = ocfs2_create_symlink_data(osb, handle, inode,
2001 symname);
2002 if (status < 0) {
2003 mlog_errno(status);
2004 goto bail;
2005 }
2006 }
2007
2008 if (si.enable) {
2009 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
2010 xattr_ac, data_ac);
2011 if (status < 0) {
2012 mlog_errno(status);
2013 goto bail;
2014 }
2015 }
2016
2017 /*
2018 * Do this before adding the entry to the directory. We add
2019 * also set d_op after success so that ->d_iput() will cleanup
2020 * the dentry lock even if ocfs2_add_entry() fails below.
2021 */
2022 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
2023 if (status) {
2024 mlog_errno(status);
2025 goto bail;
2026 }
2027
2028 dl = dentry->d_fsdata;
2029
2030 status = ocfs2_add_entry(handle, dentry, inode,
2031 le64_to_cpu(fe->i_blkno), parent_fe_bh,
2032 &lookup);
2033 if (status < 0) {
2034 mlog_errno(status);
2035 goto bail;
2036 }
2037
2038 insert_inode_hash(inode);
2039 d_instantiate(dentry, inode);
2040 bail:
2041 if (status < 0 && did_quota)
2042 dquot_free_space_nodirty(inode,
2043 ocfs2_clusters_to_bytes(osb->sb, 1));
2044 if (status < 0 && did_quota_inode)
2045 dquot_free_inode(inode);
2046 if (handle)
2047 ocfs2_commit_trans(osb, handle);
2048
2049 ocfs2_inode_unlock(dir, 1);
2050 if (did_block_signals)
2051 ocfs2_unblock_signals(&oldset);
2052
2053 brelse(new_fe_bh);
2054 brelse(parent_fe_bh);
2055 kfree(si.value);
2056 ocfs2_free_dir_lookup_result(&lookup);
2057 if (inode_ac)
2058 ocfs2_free_alloc_context(inode_ac);
2059 if (data_ac)
2060 ocfs2_free_alloc_context(data_ac);
2061 if (xattr_ac)
2062 ocfs2_free_alloc_context(xattr_ac);
2063 if ((status < 0) && inode) {
2064 if (dl)
2065 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2066
2067 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
2068 clear_nlink(inode);
2069 iput(inode);
2070 }
2071
2072 if (status)
2073 mlog_errno(status);
2074
2075 return status;
2076 }
2077
2078 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2079 {
2080 int status, namelen;
2081
2082 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2083 (long long)blkno);
2084 if (namelen <= 0) {
2085 if (namelen)
2086 status = namelen;
2087 else
2088 status = -EINVAL;
2089 mlog_errno(status);
2090 goto bail;
2091 }
2092 if (namelen != OCFS2_ORPHAN_NAMELEN) {
2093 status = -EINVAL;
2094 mlog_errno(status);
2095 goto bail;
2096 }
2097
2098 trace_ocfs2_blkno_stringify(blkno, name, namelen);
2099
2100 status = 0;
2101 bail:
2102 if (status < 0)
2103 mlog_errno(status);
2104 return status;
2105 }
2106
2107 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2108 struct inode **ret_orphan_dir,
2109 struct buffer_head **ret_orphan_dir_bh)
2110 {
2111 struct inode *orphan_dir_inode;
2112 struct buffer_head *orphan_dir_bh = NULL;
2113 int ret = 0;
2114
2115 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2116 ORPHAN_DIR_SYSTEM_INODE,
2117 osb->slot_num);
2118 if (!orphan_dir_inode) {
2119 ret = -ENOENT;
2120 mlog_errno(ret);
2121 return ret;
2122 }
2123
2124 inode_lock(orphan_dir_inode);
2125
2126 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2127 if (ret < 0) {
2128 inode_unlock(orphan_dir_inode);
2129 iput(orphan_dir_inode);
2130
2131 mlog_errno(ret);
2132 return ret;
2133 }
2134
2135 *ret_orphan_dir = orphan_dir_inode;
2136 *ret_orphan_dir_bh = orphan_dir_bh;
2137
2138 return 0;
2139 }
2140
2141 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2142 struct buffer_head *orphan_dir_bh,
2143 u64 blkno,
2144 char *name,
2145 struct ocfs2_dir_lookup_result *lookup,
2146 bool dio)
2147 {
2148 int ret;
2149 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2150 int namelen = dio ?
2151 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2152 OCFS2_ORPHAN_NAMELEN;
2153
2154 if (dio) {
2155 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2156 OCFS2_DIO_ORPHAN_PREFIX);
2157 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2158 ret = -EINVAL;
2159 mlog_errno(ret);
2160 return ret;
2161 }
2162
2163 ret = ocfs2_blkno_stringify(blkno,
2164 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2165 } else
2166 ret = ocfs2_blkno_stringify(blkno, name);
2167 if (ret < 0) {
2168 mlog_errno(ret);
2169 return ret;
2170 }
2171
2172 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2173 orphan_dir_bh, name,
2174 namelen, lookup);
2175 if (ret < 0) {
2176 mlog_errno(ret);
2177 return ret;
2178 }
2179
2180 return 0;
2181 }
2182
2183 /**
2184 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2185 * insertion of an orphan.
2186 * @osb: ocfs2 file system
2187 * @ret_orphan_dir: Orphan dir inode - returned locked!
2188 * @blkno: Actual block number of the inode to be inserted into orphan dir.
2189 * @lookup: dir lookup result, to be passed back into functions like
2190 * ocfs2_orphan_add
2191 *
2192 * Returns zero on success and the ret_orphan_dir, name and lookup
2193 * fields will be populated.
2194 *
2195 * Returns non-zero on failure.
2196 */
2197 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2198 struct inode **ret_orphan_dir,
2199 u64 blkno,
2200 char *name,
2201 struct ocfs2_dir_lookup_result *lookup,
2202 bool dio)
2203 {
2204 struct inode *orphan_dir_inode = NULL;
2205 struct buffer_head *orphan_dir_bh = NULL;
2206 int ret = 0;
2207
2208 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2209 &orphan_dir_bh);
2210 if (ret < 0) {
2211 mlog_errno(ret);
2212 return ret;
2213 }
2214
2215 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2216 blkno, name, lookup, dio);
2217 if (ret < 0) {
2218 mlog_errno(ret);
2219 goto out;
2220 }
2221
2222 *ret_orphan_dir = orphan_dir_inode;
2223
2224 out:
2225 brelse(orphan_dir_bh);
2226
2227 if (ret) {
2228 ocfs2_inode_unlock(orphan_dir_inode, 1);
2229 inode_unlock(orphan_dir_inode);
2230 iput(orphan_dir_inode);
2231 }
2232
2233 if (ret)
2234 mlog_errno(ret);
2235 return ret;
2236 }
2237
2238 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2239 handle_t *handle,
2240 struct inode *inode,
2241 struct buffer_head *fe_bh,
2242 char *name,
2243 struct ocfs2_dir_lookup_result *lookup,
2244 struct inode *orphan_dir_inode,
2245 bool dio)
2246 {
2247 struct buffer_head *orphan_dir_bh = NULL;
2248 int status = 0;
2249 struct ocfs2_dinode *orphan_fe;
2250 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2251 int namelen = dio ?
2252 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2253 OCFS2_ORPHAN_NAMELEN;
2254
2255 trace_ocfs2_orphan_add_begin(
2256 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2257
2258 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2259 if (status < 0) {
2260 mlog_errno(status);
2261 goto leave;
2262 }
2263
2264 status = ocfs2_journal_access_di(handle,
2265 INODE_CACHE(orphan_dir_inode),
2266 orphan_dir_bh,
2267 OCFS2_JOURNAL_ACCESS_WRITE);
2268 if (status < 0) {
2269 mlog_errno(status);
2270 goto leave;
2271 }
2272
2273 /*
2274 * We're going to journal the change of i_flags and i_orphaned_slot.
2275 * It's safe anyway, though some callers may duplicate the journaling.
2276 * Journaling within the func just make the logic look more
2277 * straightforward.
2278 */
2279 status = ocfs2_journal_access_di(handle,
2280 INODE_CACHE(inode),
2281 fe_bh,
2282 OCFS2_JOURNAL_ACCESS_WRITE);
2283 if (status < 0) {
2284 mlog_errno(status);
2285 goto leave;
2286 }
2287
2288 /* we're a cluster, and nlink can change on disk from
2289 * underneath us... */
2290 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2291 if (S_ISDIR(inode->i_mode))
2292 ocfs2_add_links_count(orphan_fe, 1);
2293 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2294 ocfs2_journal_dirty(handle, orphan_dir_bh);
2295
2296 status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2297 namelen, inode,
2298 OCFS2_I(inode)->ip_blkno,
2299 orphan_dir_bh, lookup);
2300 if (status < 0) {
2301 mlog_errno(status);
2302 goto rollback;
2303 }
2304
2305 if (dio) {
2306 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan
2307 * slot.
2308 */
2309 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2310 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num);
2311 } else {
2312 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2313 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2314
2315 /* Record which orphan dir our inode now resides
2316 * in. delete_inode will use this to determine which orphan
2317 * dir to lock. */
2318 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2319 }
2320
2321 ocfs2_journal_dirty(handle, fe_bh);
2322
2323 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2324 osb->slot_num);
2325
2326 rollback:
2327 if (status < 0) {
2328 if (S_ISDIR(inode->i_mode))
2329 ocfs2_add_links_count(orphan_fe, -1);
2330 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2331 }
2332
2333 leave:
2334 brelse(orphan_dir_bh);
2335
2336 return status;
2337 }
2338
2339 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2340 int ocfs2_orphan_del(struct ocfs2_super *osb,
2341 handle_t *handle,
2342 struct inode *orphan_dir_inode,
2343 struct inode *inode,
2344 struct buffer_head *orphan_dir_bh,
2345 bool dio)
2346 {
2347 const int namelen = OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN;
2348 char name[namelen + 1];
2349 struct ocfs2_dinode *orphan_fe;
2350 int status = 0;
2351 struct ocfs2_dir_lookup_result lookup = { NULL, };
2352
2353 if (dio) {
2354 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2355 OCFS2_DIO_ORPHAN_PREFIX);
2356 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2357 status = -EINVAL;
2358 mlog_errno(status);
2359 return status;
2360 }
2361
2362 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno,
2363 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2364 } else
2365 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2366 if (status < 0) {
2367 mlog_errno(status);
2368 goto leave;
2369 }
2370
2371 trace_ocfs2_orphan_del(
2372 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2373 name, strlen(name));
2374
2375 status = ocfs2_journal_access_di(handle,
2376 INODE_CACHE(orphan_dir_inode),
2377 orphan_dir_bh,
2378 OCFS2_JOURNAL_ACCESS_WRITE);
2379 if (status < 0) {
2380 mlog_errno(status);
2381 goto leave;
2382 }
2383
2384 /* find it's spot in the orphan directory */
2385 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode,
2386 &lookup);
2387 if (status) {
2388 mlog_errno(status);
2389 goto leave;
2390 }
2391
2392 /* remove it from the orphan directory */
2393 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2394 if (status < 0) {
2395 mlog_errno(status);
2396 goto leave;
2397 }
2398
2399 /* do the i_nlink dance! :) */
2400 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2401 if (S_ISDIR(inode->i_mode))
2402 ocfs2_add_links_count(orphan_fe, -1);
2403 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2404 ocfs2_journal_dirty(handle, orphan_dir_bh);
2405
2406 leave:
2407 ocfs2_free_dir_lookup_result(&lookup);
2408
2409 if (status)
2410 mlog_errno(status);
2411 return status;
2412 }
2413
2414 /**
2415 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2416 * allocated file. This is different from the typical 'add to orphan dir'
2417 * operation in that the inode does not yet exist. This is a problem because
2418 * the orphan dir stringifies the inode block number to come up with it's
2419 * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2420 * problem. This function works around it by calling deeper into the orphan
2421 * and suballoc code than other callers. Use this only by necessity.
2422 * @dir: The directory which this inode will ultimately wind up under - not the
2423 * orphan dir!
2424 * @dir_bh: buffer_head the @dir inode block
2425 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2426 * with the string to be used for orphan dirent. Pass back to the orphan dir
2427 * code.
2428 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2429 * dir code.
2430 * @ret_di_blkno: block number where the new inode will be allocated.
2431 * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2432 * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2433 *
2434 * Returns zero on success and the ret_orphan_dir, name and lookup
2435 * fields will be populated.
2436 *
2437 * Returns non-zero on failure.
2438 */
2439 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2440 struct buffer_head *dir_bh,
2441 char *orphan_name,
2442 struct inode **ret_orphan_dir,
2443 u64 *ret_di_blkno,
2444 struct ocfs2_dir_lookup_result *orphan_insert,
2445 struct ocfs2_alloc_context **ret_inode_ac)
2446 {
2447 int ret;
2448 u64 di_blkno;
2449 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2450 struct inode *orphan_dir = NULL;
2451 struct buffer_head *orphan_dir_bh = NULL;
2452 struct ocfs2_alloc_context *inode_ac = NULL;
2453
2454 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2455 if (ret < 0) {
2456 mlog_errno(ret);
2457 return ret;
2458 }
2459
2460 /* reserve an inode spot */
2461 ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2462 if (ret < 0) {
2463 if (ret != -ENOSPC)
2464 mlog_errno(ret);
2465 goto out;
2466 }
2467
2468 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2469 &di_blkno);
2470 if (ret) {
2471 mlog_errno(ret);
2472 goto out;
2473 }
2474
2475 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2476 di_blkno, orphan_name, orphan_insert,
2477 false);
2478 if (ret < 0) {
2479 mlog_errno(ret);
2480 goto out;
2481 }
2482
2483 out:
2484 if (ret == 0) {
2485 *ret_orphan_dir = orphan_dir;
2486 *ret_di_blkno = di_blkno;
2487 *ret_inode_ac = inode_ac;
2488 /*
2489 * orphan_name and orphan_insert are already up to
2490 * date via prepare_orphan_dir
2491 */
2492 } else {
2493 /* Unroll reserve_new_inode* */
2494 if (inode_ac)
2495 ocfs2_free_alloc_context(inode_ac);
2496
2497 /* Unroll orphan dir locking */
2498 inode_unlock(orphan_dir);
2499 ocfs2_inode_unlock(orphan_dir, 1);
2500 iput(orphan_dir);
2501 }
2502
2503 brelse(orphan_dir_bh);
2504
2505 return ret;
2506 }
2507
2508 int ocfs2_create_inode_in_orphan(struct inode *dir,
2509 int mode,
2510 struct inode **new_inode)
2511 {
2512 int status, did_quota_inode = 0;
2513 struct inode *inode = NULL;
2514 struct inode *orphan_dir = NULL;
2515 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2516 struct ocfs2_dinode *di = NULL;
2517 handle_t *handle = NULL;
2518 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2519 struct buffer_head *parent_di_bh = NULL;
2520 struct buffer_head *new_di_bh = NULL;
2521 struct ocfs2_alloc_context *inode_ac = NULL;
2522 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2523 u64 uninitialized_var(di_blkno), suballoc_loc;
2524 u16 suballoc_bit;
2525
2526 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2527 if (status < 0) {
2528 if (status != -ENOENT)
2529 mlog_errno(status);
2530 return status;
2531 }
2532
2533 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2534 orphan_name, &orphan_dir,
2535 &di_blkno, &orphan_insert, &inode_ac);
2536 if (status < 0) {
2537 if (status != -ENOSPC)
2538 mlog_errno(status);
2539 goto leave;
2540 }
2541
2542 inode = ocfs2_get_init_inode(dir, mode);
2543 if (IS_ERR(inode)) {
2544 status = PTR_ERR(inode);
2545 inode = NULL;
2546 mlog_errno(status);
2547 goto leave;
2548 }
2549
2550 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2551 if (IS_ERR(handle)) {
2552 status = PTR_ERR(handle);
2553 handle = NULL;
2554 mlog_errno(status);
2555 goto leave;
2556 }
2557
2558 status = dquot_alloc_inode(inode);
2559 if (status)
2560 goto leave;
2561 did_quota_inode = 1;
2562
2563 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2564 &suballoc_loc,
2565 &suballoc_bit, di_blkno);
2566 if (status < 0) {
2567 mlog_errno(status);
2568 goto leave;
2569 }
2570
2571 clear_nlink(inode);
2572 /* do the real work now. */
2573 status = __ocfs2_mknod_locked(dir, inode,
2574 0, &new_di_bh, parent_di_bh, handle,
2575 inode_ac, di_blkno, suballoc_loc,
2576 suballoc_bit);
2577 if (status < 0) {
2578 mlog_errno(status);
2579 goto leave;
2580 }
2581
2582 di = (struct ocfs2_dinode *)new_di_bh->b_data;
2583 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2584 &orphan_insert, orphan_dir, false);
2585 if (status < 0) {
2586 mlog_errno(status);
2587 goto leave;
2588 }
2589
2590 /* get open lock so that only nodes can't remove it from orphan dir. */
2591 status = ocfs2_open_lock(inode);
2592 if (status < 0)
2593 mlog_errno(status);
2594
2595 insert_inode_hash(inode);
2596 leave:
2597 if (status < 0 && did_quota_inode)
2598 dquot_free_inode(inode);
2599 if (handle)
2600 ocfs2_commit_trans(osb, handle);
2601
2602 if (orphan_dir) {
2603 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2604 ocfs2_inode_unlock(orphan_dir, 1);
2605 inode_unlock(orphan_dir);
2606 iput(orphan_dir);
2607 }
2608
2609 if ((status < 0) && inode) {
2610 clear_nlink(inode);
2611 iput(inode);
2612 }
2613
2614 if (inode_ac)
2615 ocfs2_free_alloc_context(inode_ac);
2616
2617 brelse(new_di_bh);
2618
2619 if (!status)
2620 *new_inode = inode;
2621
2622 ocfs2_free_dir_lookup_result(&orphan_insert);
2623
2624 ocfs2_inode_unlock(dir, 1);
2625 brelse(parent_di_bh);
2626 return status;
2627 }
2628
2629 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
2630 struct inode *inode)
2631 {
2632 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2633 struct inode *orphan_dir_inode = NULL;
2634 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2635 struct buffer_head *di_bh = NULL;
2636 int status = 0;
2637 handle_t *handle = NULL;
2638 struct ocfs2_dinode *di = NULL;
2639
2640 status = ocfs2_inode_lock(inode, &di_bh, 1);
2641 if (status < 0) {
2642 mlog_errno(status);
2643 goto bail;
2644 }
2645
2646 di = (struct ocfs2_dinode *) di_bh->b_data;
2647 /*
2648 * Another append dio crashed?
2649 * If so, manually recover it first.
2650 */
2651 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
2652 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode));
2653 if (status < 0) {
2654 if (status != -ENOSPC)
2655 mlog_errno(status);
2656 goto bail_unlock_inode;
2657 }
2658
2659 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0);
2660 if (status < 0) {
2661 mlog_errno(status);
2662 goto bail_unlock_inode;
2663 }
2664 }
2665
2666 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
2667 OCFS2_I(inode)->ip_blkno,
2668 orphan_name,
2669 &orphan_insert,
2670 true);
2671 if (status < 0) {
2672 mlog_errno(status);
2673 goto bail_unlock_inode;
2674 }
2675
2676 handle = ocfs2_start_trans(osb,
2677 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS);
2678 if (IS_ERR(handle)) {
2679 status = PTR_ERR(handle);
2680 goto bail_unlock_orphan;
2681 }
2682
2683 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
2684 &orphan_insert, orphan_dir_inode, true);
2685 if (status)
2686 mlog_errno(status);
2687
2688 ocfs2_commit_trans(osb, handle);
2689
2690 bail_unlock_orphan:
2691 ocfs2_inode_unlock(orphan_dir_inode, 1);
2692 inode_unlock(orphan_dir_inode);
2693 iput(orphan_dir_inode);
2694
2695 ocfs2_free_dir_lookup_result(&orphan_insert);
2696
2697 bail_unlock_inode:
2698 ocfs2_inode_unlock(inode, 1);
2699 brelse(di_bh);
2700
2701 bail:
2702 return status;
2703 }
2704
2705 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
2706 struct inode *inode, struct buffer_head *di_bh,
2707 int update_isize, loff_t end)
2708 {
2709 struct inode *orphan_dir_inode = NULL;
2710 struct buffer_head *orphan_dir_bh = NULL;
2711 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2712 handle_t *handle = NULL;
2713 int status = 0;
2714
2715 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2716 ORPHAN_DIR_SYSTEM_INODE,
2717 le16_to_cpu(di->i_dio_orphaned_slot));
2718 if (!orphan_dir_inode) {
2719 status = -ENOENT;
2720 mlog_errno(status);
2721 goto bail;
2722 }
2723
2724 inode_lock(orphan_dir_inode);
2725 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2726 if (status < 0) {
2727 inode_unlock(orphan_dir_inode);
2728 iput(orphan_dir_inode);
2729 mlog_errno(status);
2730 goto bail;
2731 }
2732
2733 handle = ocfs2_start_trans(osb,
2734 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS);
2735 if (IS_ERR(handle)) {
2736 status = PTR_ERR(handle);
2737 goto bail_unlock_orphan;
2738 }
2739
2740 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)));
2741
2742 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
2743 inode, orphan_dir_bh, true);
2744 if (status < 0) {
2745 mlog_errno(status);
2746 goto bail_commit;
2747 }
2748
2749 status = ocfs2_journal_access_di(handle,
2750 INODE_CACHE(inode),
2751 di_bh,
2752 OCFS2_JOURNAL_ACCESS_WRITE);
2753 if (status < 0) {
2754 mlog_errno(status);
2755 goto bail_commit;
2756 }
2757
2758 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2759 di->i_dio_orphaned_slot = 0;
2760
2761 if (update_isize) {
2762 status = ocfs2_set_inode_size(handle, inode, di_bh, end);
2763 if (status)
2764 mlog_errno(status);
2765 } else
2766 ocfs2_journal_dirty(handle, di_bh);
2767
2768 bail_commit:
2769 ocfs2_commit_trans(osb, handle);
2770
2771 bail_unlock_orphan:
2772 ocfs2_inode_unlock(orphan_dir_inode, 1);
2773 inode_unlock(orphan_dir_inode);
2774 brelse(orphan_dir_bh);
2775 iput(orphan_dir_inode);
2776
2777 bail:
2778 return status;
2779 }
2780
2781 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2782 struct inode *inode,
2783 struct dentry *dentry)
2784 {
2785 int status = 0;
2786 struct buffer_head *parent_di_bh = NULL;
2787 handle_t *handle = NULL;
2788 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2789 struct ocfs2_dinode *dir_di, *di;
2790 struct inode *orphan_dir_inode = NULL;
2791 struct buffer_head *orphan_dir_bh = NULL;
2792 struct buffer_head *di_bh = NULL;
2793 struct ocfs2_dir_lookup_result lookup = { NULL, };
2794
2795 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2796 dentry->d_name.len, dentry->d_name.name,
2797 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2798 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2799
2800 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2801 if (status < 0) {
2802 if (status != -ENOENT)
2803 mlog_errno(status);
2804 return status;
2805 }
2806
2807 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2808 if (!dir_di->i_links_count) {
2809 /* can't make a file in a deleted directory. */
2810 status = -ENOENT;
2811 goto leave;
2812 }
2813
2814 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2815 dentry->d_name.len);
2816 if (status)
2817 goto leave;
2818
2819 /* get a spot inside the dir. */
2820 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2821 dentry->d_name.name,
2822 dentry->d_name.len, &lookup);
2823 if (status < 0) {
2824 mlog_errno(status);
2825 goto leave;
2826 }
2827
2828 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2829 ORPHAN_DIR_SYSTEM_INODE,
2830 osb->slot_num);
2831 if (!orphan_dir_inode) {
2832 status = -ENOENT;
2833 mlog_errno(status);
2834 goto leave;
2835 }
2836
2837 inode_lock(orphan_dir_inode);
2838
2839 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2840 if (status < 0) {
2841 mlog_errno(status);
2842 inode_unlock(orphan_dir_inode);
2843 iput(orphan_dir_inode);
2844 goto leave;
2845 }
2846
2847 status = ocfs2_read_inode_block(inode, &di_bh);
2848 if (status < 0) {
2849 mlog_errno(status);
2850 goto orphan_unlock;
2851 }
2852
2853 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2854 if (IS_ERR(handle)) {
2855 status = PTR_ERR(handle);
2856 handle = NULL;
2857 mlog_errno(status);
2858 goto orphan_unlock;
2859 }
2860
2861 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2862 di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2863 if (status < 0) {
2864 mlog_errno(status);
2865 goto out_commit;
2866 }
2867
2868 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2869 orphan_dir_bh, false);
2870 if (status < 0) {
2871 mlog_errno(status);
2872 goto out_commit;
2873 }
2874
2875 di = (struct ocfs2_dinode *)di_bh->b_data;
2876 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2877 di->i_orphaned_slot = 0;
2878 set_nlink(inode, 1);
2879 ocfs2_set_links_count(di, inode->i_nlink);
2880 ocfs2_update_inode_fsync_trans(handle, inode, 1);
2881 ocfs2_journal_dirty(handle, di_bh);
2882
2883 status = ocfs2_add_entry(handle, dentry, inode,
2884 OCFS2_I(inode)->ip_blkno, parent_di_bh,
2885 &lookup);
2886 if (status < 0) {
2887 mlog_errno(status);
2888 goto out_commit;
2889 }
2890
2891 status = ocfs2_dentry_attach_lock(dentry, inode,
2892 OCFS2_I(dir)->ip_blkno);
2893 if (status) {
2894 mlog_errno(status);
2895 goto out_commit;
2896 }
2897
2898 d_instantiate(dentry, inode);
2899 status = 0;
2900 out_commit:
2901 ocfs2_commit_trans(osb, handle);
2902 orphan_unlock:
2903 ocfs2_inode_unlock(orphan_dir_inode, 1);
2904 inode_unlock(orphan_dir_inode);
2905 iput(orphan_dir_inode);
2906 leave:
2907
2908 ocfs2_inode_unlock(dir, 1);
2909
2910 brelse(di_bh);
2911 brelse(parent_di_bh);
2912 brelse(orphan_dir_bh);
2913
2914 ocfs2_free_dir_lookup_result(&lookup);
2915
2916 if (status)
2917 mlog_errno(status);
2918
2919 return status;
2920 }
2921
2922 const struct inode_operations ocfs2_dir_iops = {
2923 .create = ocfs2_create,
2924 .lookup = ocfs2_lookup,
2925 .link = ocfs2_link,
2926 .unlink = ocfs2_unlink,
2927 .rmdir = ocfs2_unlink,
2928 .symlink = ocfs2_symlink,
2929 .mkdir = ocfs2_mkdir,
2930 .mknod = ocfs2_mknod,
2931 .rename = ocfs2_rename,
2932 .setattr = ocfs2_setattr,
2933 .getattr = ocfs2_getattr,
2934 .permission = ocfs2_permission,
2935 .setxattr = generic_setxattr,
2936 .getxattr = generic_getxattr,
2937 .listxattr = ocfs2_listxattr,
2938 .removexattr = generic_removexattr,
2939 .fiemap = ocfs2_fiemap,
2940 .get_acl = ocfs2_iop_get_acl,
2941 .set_acl = ocfs2_iop_set_acl,
2942 };
Linux with added FPC-III support