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Merge remote-tracking branch 'ovl/rename2' into for-linus
[mirror_ubuntu-zesty-kernel.git] / fs / ocfs2 / namei.c
1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * namei.c
5 *
6 * Create and rename file, directory, symlinks
7 *
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
9 *
10 * Portions of this code from linux/fs/ext3/dir.c
11 *
12 * Copyright (C) 1992, 1993, 1994, 1995
13 * Remy Card (card@masi.ibp.fr)
14 * Laboratoire MASI - Institut Blaise pascal
15 * Universite Pierre et Marie Curie (Paris VI)
16 *
17 * from
18 *
19 * linux/fs/minix/dir.c
20 *
21 * Copyright (C) 1991, 1992 Linux Torvalds
22 *
23 * This program is free software; you can redistribute it and/or
24 * modify it under the terms of the GNU General Public
25 * License as published by the Free Software Foundation; either
26 * version 2 of the License, or (at your option) any later version.
27 *
28 * This program is distributed in the hope that it will be useful,
29 * but WITHOUT ANY WARRANTY; without even the implied warranty of
30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
31 * General Public License for more details.
32 *
33 * You should have received a copy of the GNU General Public
34 * License along with this program; if not, write to the
35 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
36 * Boston, MA 021110-1307, USA.
37 */
38
39 #include <linux/fs.h>
40 #include <linux/types.h>
41 #include <linux/slab.h>
42 #include <linux/highmem.h>
43 #include <linux/quotaops.h>
44
45 #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 ocfs2_dentry_lock *dl = NULL;
263
264 trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
265 (unsigned long long)OCFS2_I(dir)->ip_blkno,
266 (unsigned long)dev, mode);
267
268 status = dquot_initialize(dir);
269 if (status) {
270 mlog_errno(status);
271 return status;
272 }
273
274 /* get our super block */
275 osb = OCFS2_SB(dir->i_sb);
276
277 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
278 if (status < 0) {
279 if (status != -ENOENT)
280 mlog_errno(status);
281 return status;
282 }
283
284 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
285 status = -EMLINK;
286 goto leave;
287 }
288
289 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
290 if (!ocfs2_read_links_count(dirfe)) {
291 /* can't make a file in a deleted directory. */
292 status = -ENOENT;
293 goto leave;
294 }
295
296 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
297 dentry->d_name.len);
298 if (status)
299 goto leave;
300
301 /* get a spot inside the dir. */
302 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
303 dentry->d_name.name,
304 dentry->d_name.len, &lookup);
305 if (status < 0) {
306 mlog_errno(status);
307 goto leave;
308 }
309
310 /* reserve an inode spot */
311 status = ocfs2_reserve_new_inode(osb, &inode_ac);
312 if (status < 0) {
313 if (status != -ENOSPC)
314 mlog_errno(status);
315 goto leave;
316 }
317
318 inode = ocfs2_get_init_inode(dir, mode);
319 if (IS_ERR(inode)) {
320 status = PTR_ERR(inode);
321 inode = NULL;
322 mlog_errno(status);
323 goto leave;
324 }
325
326 /* get security xattr */
327 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
328 if (status) {
329 if (status == -EOPNOTSUPP)
330 si.enable = 0;
331 else {
332 mlog_errno(status);
333 goto leave;
334 }
335 }
336
337 /* calculate meta data/clusters for setting security and acl xattr */
338 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
339 &si, &want_clusters,
340 &xattr_credits, &want_meta);
341 if (status < 0) {
342 mlog_errno(status);
343 goto leave;
344 }
345
346 /* Reserve a cluster if creating an extent based directory. */
347 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
348 want_clusters += 1;
349
350 /* Dir indexing requires extra space as well */
351 if (ocfs2_supports_indexed_dirs(osb))
352 want_meta++;
353 }
354
355 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
356 if (status < 0) {
357 if (status != -ENOSPC)
358 mlog_errno(status);
359 goto leave;
360 }
361
362 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
363 if (status < 0) {
364 if (status != -ENOSPC)
365 mlog_errno(status);
366 goto leave;
367 }
368
369 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
370 S_ISDIR(mode),
371 xattr_credits));
372 if (IS_ERR(handle)) {
373 status = PTR_ERR(handle);
374 handle = NULL;
375 mlog_errno(status);
376 goto leave;
377 }
378
379 /* Starting to change things, restart is no longer possible. */
380 ocfs2_block_signals(&oldset);
381 did_block_signals = 1;
382
383 status = dquot_alloc_inode(inode);
384 if (status)
385 goto leave;
386 did_quota_inode = 1;
387
388 /* do the real work now. */
389 status = ocfs2_mknod_locked(osb, dir, inode, dev,
390 &new_fe_bh, parent_fe_bh, handle,
391 inode_ac);
392 if (status < 0) {
393 mlog_errno(status);
394 goto leave;
395 }
396
397 if (S_ISDIR(mode)) {
398 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
399 new_fe_bh, data_ac, meta_ac);
400 if (status < 0) {
401 mlog_errno(status);
402 goto leave;
403 }
404
405 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
406 parent_fe_bh,
407 OCFS2_JOURNAL_ACCESS_WRITE);
408 if (status < 0) {
409 mlog_errno(status);
410 goto leave;
411 }
412 ocfs2_add_links_count(dirfe, 1);
413 ocfs2_journal_dirty(handle, parent_fe_bh);
414 inc_nlink(dir);
415 }
416
417 status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
418 meta_ac, data_ac);
419
420 if (status < 0) {
421 mlog_errno(status);
422 goto leave;
423 }
424
425 if (si.enable) {
426 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
427 meta_ac, data_ac);
428 if (status < 0) {
429 mlog_errno(status);
430 goto leave;
431 }
432 }
433
434 /*
435 * Do this before adding the entry to the directory. We add
436 * also set d_op after success so that ->d_iput() will cleanup
437 * the dentry lock even if ocfs2_add_entry() fails below.
438 */
439 status = ocfs2_dentry_attach_lock(dentry, inode,
440 OCFS2_I(dir)->ip_blkno);
441 if (status) {
442 mlog_errno(status);
443 goto leave;
444 }
445
446 dl = dentry->d_fsdata;
447
448 status = ocfs2_add_entry(handle, dentry, inode,
449 OCFS2_I(inode)->ip_blkno, parent_fe_bh,
450 &lookup);
451 if (status < 0) {
452 mlog_errno(status);
453 goto leave;
454 }
455
456 insert_inode_hash(inode);
457 d_instantiate(dentry, inode);
458 status = 0;
459 leave:
460 if (status < 0 && did_quota_inode)
461 dquot_free_inode(inode);
462 if (handle)
463 ocfs2_commit_trans(osb, handle);
464
465 ocfs2_inode_unlock(dir, 1);
466 if (did_block_signals)
467 ocfs2_unblock_signals(&oldset);
468
469 brelse(new_fe_bh);
470 brelse(parent_fe_bh);
471 kfree(si.value);
472
473 ocfs2_free_dir_lookup_result(&lookup);
474
475 if (inode_ac)
476 ocfs2_free_alloc_context(inode_ac);
477
478 if (data_ac)
479 ocfs2_free_alloc_context(data_ac);
480
481 if (meta_ac)
482 ocfs2_free_alloc_context(meta_ac);
483
484 /*
485 * We should call iput after the i_mutex of the bitmap been
486 * unlocked in ocfs2_free_alloc_context, or the
487 * ocfs2_delete_inode will mutex_lock again.
488 */
489 if ((status < 0) && inode) {
490 if (dl)
491 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
492
493 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
494 clear_nlink(inode);
495 iput(inode);
496 }
497
498 if (status)
499 mlog_errno(status);
500
501 return status;
502 }
503
504 static int __ocfs2_mknod_locked(struct inode *dir,
505 struct inode *inode,
506 dev_t dev,
507 struct buffer_head **new_fe_bh,
508 struct buffer_head *parent_fe_bh,
509 handle_t *handle,
510 struct ocfs2_alloc_context *inode_ac,
511 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
512 {
513 int status = 0;
514 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
515 struct ocfs2_dinode *fe = NULL;
516 struct ocfs2_extent_list *fel;
517 u16 feat;
518 struct ocfs2_inode_info *oi = OCFS2_I(inode);
519
520 *new_fe_bh = NULL;
521
522 /* populate as many fields early on as possible - many of
523 * these are used by the support functions here and in
524 * callers. */
525 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
526 OCFS2_I(inode)->ip_blkno = fe_blkno;
527 spin_lock(&osb->osb_lock);
528 inode->i_generation = osb->s_next_generation++;
529 spin_unlock(&osb->osb_lock);
530
531 *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
532 if (!*new_fe_bh) {
533 status = -ENOMEM;
534 mlog_errno(status);
535 goto leave;
536 }
537 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
538
539 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
540 *new_fe_bh,
541 OCFS2_JOURNAL_ACCESS_CREATE);
542 if (status < 0) {
543 mlog_errno(status);
544 goto leave;
545 }
546
547 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
548 memset(fe, 0, osb->sb->s_blocksize);
549
550 fe->i_generation = cpu_to_le32(inode->i_generation);
551 fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
552 fe->i_blkno = cpu_to_le64(fe_blkno);
553 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
554 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
555 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
556 fe->i_uid = cpu_to_le32(i_uid_read(inode));
557 fe->i_gid = cpu_to_le32(i_gid_read(inode));
558 fe->i_mode = cpu_to_le16(inode->i_mode);
559 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
560 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
561
562 ocfs2_set_links_count(fe, inode->i_nlink);
563
564 fe->i_last_eb_blk = 0;
565 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
566 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
567 fe->i_atime = fe->i_ctime = fe->i_mtime =
568 cpu_to_le64(CURRENT_TIME.tv_sec);
569 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
570 cpu_to_le32(CURRENT_TIME.tv_nsec);
571 fe->i_dtime = 0;
572
573 /*
574 * If supported, directories start with inline data. If inline
575 * isn't supported, but indexing is, we start them as indexed.
576 */
577 feat = le16_to_cpu(fe->i_dyn_features);
578 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
579 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
580
581 fe->id2.i_data.id_count = cpu_to_le16(
582 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
583 } else {
584 fel = &fe->id2.i_list;
585 fel->l_tree_depth = 0;
586 fel->l_next_free_rec = 0;
587 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
588 }
589
590 ocfs2_journal_dirty(handle, *new_fe_bh);
591
592 ocfs2_populate_inode(inode, fe, 1);
593 ocfs2_ci_set_new(osb, INODE_CACHE(inode));
594 if (!ocfs2_mount_local(osb)) {
595 status = ocfs2_create_new_inode_locks(inode);
596 if (status < 0)
597 mlog_errno(status);
598 }
599
600 oi->i_sync_tid = handle->h_transaction->t_tid;
601 oi->i_datasync_tid = handle->h_transaction->t_tid;
602
603 leave:
604 if (status < 0) {
605 if (*new_fe_bh) {
606 brelse(*new_fe_bh);
607 *new_fe_bh = NULL;
608 }
609 }
610
611 if (status)
612 mlog_errno(status);
613 return status;
614 }
615
616 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
617 struct inode *dir,
618 struct inode *inode,
619 dev_t dev,
620 struct buffer_head **new_fe_bh,
621 struct buffer_head *parent_fe_bh,
622 handle_t *handle,
623 struct ocfs2_alloc_context *inode_ac)
624 {
625 int status = 0;
626 u64 suballoc_loc, fe_blkno = 0;
627 u16 suballoc_bit;
628
629 *new_fe_bh = NULL;
630
631 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
632 inode_ac, &suballoc_loc,
633 &suballoc_bit, &fe_blkno);
634 if (status < 0) {
635 mlog_errno(status);
636 return status;
637 }
638
639 status = __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
640 parent_fe_bh, handle, inode_ac,
641 fe_blkno, suballoc_loc, suballoc_bit);
642 if (status < 0) {
643 u64 bg_blkno = ocfs2_which_suballoc_group(fe_blkno, suballoc_bit);
644 int tmp = ocfs2_free_suballoc_bits(handle, inode_ac->ac_inode,
645 inode_ac->ac_bh, suballoc_bit, bg_blkno, 1);
646 if (tmp)
647 mlog_errno(tmp);
648 }
649
650 return status;
651 }
652
653 static int ocfs2_mkdir(struct inode *dir,
654 struct dentry *dentry,
655 umode_t mode)
656 {
657 int ret;
658
659 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
660 OCFS2_I(dir)->ip_blkno, mode);
661 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
662 if (ret)
663 mlog_errno(ret);
664
665 return ret;
666 }
667
668 static int ocfs2_create(struct inode *dir,
669 struct dentry *dentry,
670 umode_t mode,
671 bool excl)
672 {
673 int ret;
674
675 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
676 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
677 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
678 if (ret)
679 mlog_errno(ret);
680
681 return ret;
682 }
683
684 static int ocfs2_link(struct dentry *old_dentry,
685 struct inode *dir,
686 struct dentry *dentry)
687 {
688 handle_t *handle;
689 struct inode *inode = d_inode(old_dentry);
690 struct inode *old_dir = d_inode(old_dentry->d_parent);
691 int err;
692 struct buffer_head *fe_bh = NULL;
693 struct buffer_head *old_dir_bh = NULL;
694 struct buffer_head *parent_fe_bh = NULL;
695 struct ocfs2_dinode *fe = NULL;
696 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
697 struct ocfs2_dir_lookup_result lookup = { NULL, };
698 sigset_t oldset;
699 u64 old_de_ino;
700
701 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
702 old_dentry->d_name.len, old_dentry->d_name.name,
703 dentry->d_name.len, dentry->d_name.name);
704
705 if (S_ISDIR(inode->i_mode))
706 return -EPERM;
707
708 err = dquot_initialize(dir);
709 if (err) {
710 mlog_errno(err);
711 return err;
712 }
713
714 err = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
715 &parent_fe_bh, dir, 0);
716 if (err < 0) {
717 if (err != -ENOENT)
718 mlog_errno(err);
719 return err;
720 }
721
722 /* make sure both dirs have bhs
723 * get an extra ref on old_dir_bh if old==new */
724 if (!parent_fe_bh) {
725 if (old_dir_bh) {
726 parent_fe_bh = old_dir_bh;
727 get_bh(parent_fe_bh);
728 } else {
729 mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str);
730 err = -EIO;
731 goto out;
732 }
733 }
734
735 if (!dir->i_nlink) {
736 err = -ENOENT;
737 goto out;
738 }
739
740 err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
741 old_dentry->d_name.len, &old_de_ino);
742 if (err) {
743 err = -ENOENT;
744 goto out;
745 }
746
747 /*
748 * Check whether another node removed the source inode while we
749 * were in the vfs.
750 */
751 if (old_de_ino != OCFS2_I(inode)->ip_blkno) {
752 err = -ENOENT;
753 goto out;
754 }
755
756 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
757 dentry->d_name.len);
758 if (err)
759 goto out;
760
761 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
762 dentry->d_name.name,
763 dentry->d_name.len, &lookup);
764 if (err < 0) {
765 mlog_errno(err);
766 goto out;
767 }
768
769 err = ocfs2_inode_lock(inode, &fe_bh, 1);
770 if (err < 0) {
771 if (err != -ENOENT)
772 mlog_errno(err);
773 goto out;
774 }
775
776 fe = (struct ocfs2_dinode *) fe_bh->b_data;
777 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
778 err = -EMLINK;
779 goto out_unlock_inode;
780 }
781
782 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
783 if (IS_ERR(handle)) {
784 err = PTR_ERR(handle);
785 handle = NULL;
786 mlog_errno(err);
787 goto out_unlock_inode;
788 }
789
790 /* Starting to change things, restart is no longer possible. */
791 ocfs2_block_signals(&oldset);
792
793 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
794 OCFS2_JOURNAL_ACCESS_WRITE);
795 if (err < 0) {
796 mlog_errno(err);
797 goto out_commit;
798 }
799
800 inc_nlink(inode);
801 inode->i_ctime = current_time(inode);
802 ocfs2_set_links_count(fe, inode->i_nlink);
803 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
804 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
805 ocfs2_journal_dirty(handle, fe_bh);
806
807 err = ocfs2_add_entry(handle, dentry, inode,
808 OCFS2_I(inode)->ip_blkno,
809 parent_fe_bh, &lookup);
810 if (err) {
811 ocfs2_add_links_count(fe, -1);
812 drop_nlink(inode);
813 mlog_errno(err);
814 goto out_commit;
815 }
816
817 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
818 if (err) {
819 mlog_errno(err);
820 goto out_commit;
821 }
822
823 ihold(inode);
824 d_instantiate(dentry, inode);
825
826 out_commit:
827 ocfs2_commit_trans(osb, handle);
828 ocfs2_unblock_signals(&oldset);
829 out_unlock_inode:
830 ocfs2_inode_unlock(inode, 1);
831
832 out:
833 ocfs2_double_unlock(old_dir, dir);
834
835 brelse(fe_bh);
836 brelse(parent_fe_bh);
837 brelse(old_dir_bh);
838
839 ocfs2_free_dir_lookup_result(&lookup);
840
841 if (err)
842 mlog_errno(err);
843
844 return err;
845 }
846
847 /*
848 * Takes and drops an exclusive lock on the given dentry. This will
849 * force other nodes to drop it.
850 */
851 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
852 {
853 int ret;
854
855 ret = ocfs2_dentry_lock(dentry, 1);
856 if (ret)
857 mlog_errno(ret);
858 else
859 ocfs2_dentry_unlock(dentry, 1);
860
861 return ret;
862 }
863
864 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
865 {
866 if (S_ISDIR(inode->i_mode)) {
867 if (inode->i_nlink == 2)
868 return 1;
869 return 0;
870 }
871
872 if (inode->i_nlink == 1)
873 return 1;
874 return 0;
875 }
876
877 static int ocfs2_unlink(struct inode *dir,
878 struct dentry *dentry)
879 {
880 int status;
881 int child_locked = 0;
882 bool is_unlinkable = false;
883 struct inode *inode = d_inode(dentry);
884 struct inode *orphan_dir = NULL;
885 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
886 u64 blkno;
887 struct ocfs2_dinode *fe = NULL;
888 struct buffer_head *fe_bh = NULL;
889 struct buffer_head *parent_node_bh = NULL;
890 handle_t *handle = NULL;
891 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
892 struct ocfs2_dir_lookup_result lookup = { NULL, };
893 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
894
895 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
896 dentry->d_name.name,
897 (unsigned long long)OCFS2_I(dir)->ip_blkno,
898 (unsigned long long)OCFS2_I(inode)->ip_blkno);
899
900 status = dquot_initialize(dir);
901 if (status) {
902 mlog_errno(status);
903 return status;
904 }
905
906 BUG_ON(d_inode(dentry->d_parent) != dir);
907
908 if (inode == osb->root_inode)
909 return -EPERM;
910
911 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
912 OI_LS_PARENT);
913 if (status < 0) {
914 if (status != -ENOENT)
915 mlog_errno(status);
916 return status;
917 }
918
919 status = ocfs2_find_files_on_disk(dentry->d_name.name,
920 dentry->d_name.len, &blkno, dir,
921 &lookup);
922 if (status < 0) {
923 if (status != -ENOENT)
924 mlog_errno(status);
925 goto leave;
926 }
927
928 if (OCFS2_I(inode)->ip_blkno != blkno) {
929 status = -ENOENT;
930
931 trace_ocfs2_unlink_noent(
932 (unsigned long long)OCFS2_I(inode)->ip_blkno,
933 (unsigned long long)blkno,
934 OCFS2_I(inode)->ip_flags);
935 goto leave;
936 }
937
938 status = ocfs2_inode_lock(inode, &fe_bh, 1);
939 if (status < 0) {
940 if (status != -ENOENT)
941 mlog_errno(status);
942 goto leave;
943 }
944 child_locked = 1;
945
946 if (S_ISDIR(inode->i_mode)) {
947 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
948 status = -ENOTEMPTY;
949 goto leave;
950 }
951 }
952
953 status = ocfs2_remote_dentry_delete(dentry);
954 if (status < 0) {
955 /* This remote delete should succeed under all normal
956 * circumstances. */
957 mlog_errno(status);
958 goto leave;
959 }
960
961 if (ocfs2_inode_is_unlinkable(inode)) {
962 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
963 OCFS2_I(inode)->ip_blkno,
964 orphan_name, &orphan_insert,
965 false);
966 if (status < 0) {
967 mlog_errno(status);
968 goto leave;
969 }
970 is_unlinkable = true;
971 }
972
973 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
974 if (IS_ERR(handle)) {
975 status = PTR_ERR(handle);
976 handle = NULL;
977 mlog_errno(status);
978 goto leave;
979 }
980
981 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
982 OCFS2_JOURNAL_ACCESS_WRITE);
983 if (status < 0) {
984 mlog_errno(status);
985 goto leave;
986 }
987
988 fe = (struct ocfs2_dinode *) fe_bh->b_data;
989
990 /* delete the name from the parent dir */
991 status = ocfs2_delete_entry(handle, dir, &lookup);
992 if (status < 0) {
993 mlog_errno(status);
994 goto leave;
995 }
996
997 if (S_ISDIR(inode->i_mode))
998 drop_nlink(inode);
999 drop_nlink(inode);
1000 ocfs2_set_links_count(fe, inode->i_nlink);
1001 ocfs2_journal_dirty(handle, fe_bh);
1002
1003 dir->i_ctime = dir->i_mtime = current_time(dir);
1004 if (S_ISDIR(inode->i_mode))
1005 drop_nlink(dir);
1006
1007 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
1008 if (status < 0) {
1009 mlog_errno(status);
1010 if (S_ISDIR(inode->i_mode))
1011 inc_nlink(dir);
1012 goto leave;
1013 }
1014
1015 if (is_unlinkable) {
1016 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
1017 orphan_name, &orphan_insert, orphan_dir, false);
1018 if (status < 0)
1019 mlog_errno(status);
1020 }
1021
1022 leave:
1023 if (handle)
1024 ocfs2_commit_trans(osb, handle);
1025
1026 if (orphan_dir) {
1027 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1028 ocfs2_inode_unlock(orphan_dir, 1);
1029 inode_unlock(orphan_dir);
1030 iput(orphan_dir);
1031 }
1032
1033 if (child_locked)
1034 ocfs2_inode_unlock(inode, 1);
1035
1036 ocfs2_inode_unlock(dir, 1);
1037
1038 brelse(fe_bh);
1039 brelse(parent_node_bh);
1040
1041 ocfs2_free_dir_lookup_result(&orphan_insert);
1042 ocfs2_free_dir_lookup_result(&lookup);
1043
1044 if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
1045 mlog_errno(status);
1046
1047 return status;
1048 }
1049
1050 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb,
1051 u64 src_inode_no, u64 dest_inode_no)
1052 {
1053 int ret = 0, i = 0;
1054 u64 parent_inode_no = 0;
1055 u64 child_inode_no = src_inode_no;
1056 struct inode *child_inode;
1057
1058 #define MAX_LOOKUP_TIMES 32
1059 while (1) {
1060 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0);
1061 if (IS_ERR(child_inode)) {
1062 ret = PTR_ERR(child_inode);
1063 break;
1064 }
1065
1066 ret = ocfs2_inode_lock(child_inode, NULL, 0);
1067 if (ret < 0) {
1068 iput(child_inode);
1069 if (ret != -ENOENT)
1070 mlog_errno(ret);
1071 break;
1072 }
1073
1074 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2,
1075 &parent_inode_no);
1076 ocfs2_inode_unlock(child_inode, 0);
1077 iput(child_inode);
1078 if (ret < 0) {
1079 ret = -ENOENT;
1080 break;
1081 }
1082
1083 if (parent_inode_no == dest_inode_no) {
1084 ret = 1;
1085 break;
1086 }
1087
1088 if (parent_inode_no == osb->root_inode->i_ino) {
1089 ret = 0;
1090 break;
1091 }
1092
1093 child_inode_no = parent_inode_no;
1094
1095 if (++i >= MAX_LOOKUP_TIMES) {
1096 mlog(ML_NOTICE, "max lookup times reached, filesystem "
1097 "may have nested directories, "
1098 "src inode: %llu, dest inode: %llu.\n",
1099 (unsigned long long)src_inode_no,
1100 (unsigned long long)dest_inode_no);
1101 ret = 0;
1102 break;
1103 }
1104 }
1105
1106 return ret;
1107 }
1108
1109 /*
1110 * The only place this should be used is rename and link!
1111 * if they have the same id, then the 1st one is the only one locked.
1112 */
1113 static int ocfs2_double_lock(struct ocfs2_super *osb,
1114 struct buffer_head **bh1,
1115 struct inode *inode1,
1116 struct buffer_head **bh2,
1117 struct inode *inode2,
1118 int rename)
1119 {
1120 int status;
1121 int inode1_is_ancestor, inode2_is_ancestor;
1122 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
1123 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
1124
1125 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
1126 (unsigned long long)oi2->ip_blkno);
1127
1128 if (*bh1)
1129 *bh1 = NULL;
1130 if (*bh2)
1131 *bh2 = NULL;
1132
1133 /* we always want to lock the one with the lower lockid first.
1134 * and if they are nested, we lock ancestor first */
1135 if (oi1->ip_blkno != oi2->ip_blkno) {
1136 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno,
1137 oi1->ip_blkno);
1138 if (inode1_is_ancestor < 0) {
1139 status = inode1_is_ancestor;
1140 goto bail;
1141 }
1142
1143 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno,
1144 oi2->ip_blkno);
1145 if (inode2_is_ancestor < 0) {
1146 status = inode2_is_ancestor;
1147 goto bail;
1148 }
1149
1150 if ((inode1_is_ancestor == 1) ||
1151 (oi1->ip_blkno < oi2->ip_blkno &&
1152 inode2_is_ancestor == 0)) {
1153 /* switch id1 and id2 around */
1154 swap(bh2, bh1);
1155 swap(inode2, inode1);
1156 }
1157 /* lock id2 */
1158 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1159 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT);
1160 if (status < 0) {
1161 if (status != -ENOENT)
1162 mlog_errno(status);
1163 goto bail;
1164 }
1165 }
1166
1167 /* lock id1 */
1168 status = ocfs2_inode_lock_nested(inode1, bh1, 1,
1169 rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT);
1170 if (status < 0) {
1171 /*
1172 * An error return must mean that no cluster locks
1173 * were held on function exit.
1174 */
1175 if (oi1->ip_blkno != oi2->ip_blkno) {
1176 ocfs2_inode_unlock(inode2, 1);
1177 brelse(*bh2);
1178 *bh2 = NULL;
1179 }
1180
1181 if (status != -ENOENT)
1182 mlog_errno(status);
1183 }
1184
1185 trace_ocfs2_double_lock_end(
1186 (unsigned long long)OCFS2_I(inode1)->ip_blkno,
1187 (unsigned long long)OCFS2_I(inode2)->ip_blkno);
1188
1189 bail:
1190 if (status)
1191 mlog_errno(status);
1192 return status;
1193 }
1194
1195 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1196 {
1197 ocfs2_inode_unlock(inode1, 1);
1198
1199 if (inode1 != inode2)
1200 ocfs2_inode_unlock(inode2, 1);
1201 }
1202
1203 static int ocfs2_rename(struct inode *old_dir,
1204 struct dentry *old_dentry,
1205 struct inode *new_dir,
1206 struct dentry *new_dentry,
1207 unsigned int flags)
1208 {
1209 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1210 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1211 struct inode *old_inode = d_inode(old_dentry);
1212 struct inode *new_inode = d_inode(new_dentry);
1213 struct inode *orphan_dir = NULL;
1214 struct ocfs2_dinode *newfe = NULL;
1215 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1216 struct buffer_head *newfe_bh = NULL;
1217 struct buffer_head *old_inode_bh = NULL;
1218 struct ocfs2_super *osb = NULL;
1219 u64 newfe_blkno, old_de_ino;
1220 handle_t *handle = NULL;
1221 struct buffer_head *old_dir_bh = NULL;
1222 struct buffer_head *new_dir_bh = NULL;
1223 u32 old_dir_nlink = old_dir->i_nlink;
1224 struct ocfs2_dinode *old_di;
1225 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1226 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1227 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1228 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1229 struct ocfs2_dir_lookup_result target_insert = { NULL, };
1230 bool should_add_orphan = false;
1231
1232 if (flags)
1233 return -EINVAL;
1234
1235 /* At some point it might be nice to break this function up a
1236 * bit. */
1237
1238 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1239 old_dentry->d_name.len, old_dentry->d_name.name,
1240 new_dentry->d_name.len, new_dentry->d_name.name);
1241
1242 status = dquot_initialize(old_dir);
1243 if (status) {
1244 mlog_errno(status);
1245 goto bail;
1246 }
1247 status = dquot_initialize(new_dir);
1248 if (status) {
1249 mlog_errno(status);
1250 goto bail;
1251 }
1252
1253 osb = OCFS2_SB(old_dir->i_sb);
1254
1255 if (new_inode) {
1256 if (!igrab(new_inode))
1257 BUG();
1258 }
1259
1260 /* Assume a directory hierarchy thusly:
1261 * a/b/c
1262 * a/d
1263 * a,b,c, and d are all directories.
1264 *
1265 * from cwd of 'a' on both nodes:
1266 * node1: mv b/c d
1267 * node2: mv d b/c
1268 *
1269 * And that's why, just like the VFS, we need a file system
1270 * rename lock. */
1271 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1272 status = ocfs2_rename_lock(osb);
1273 if (status < 0) {
1274 mlog_errno(status);
1275 goto bail;
1276 }
1277 rename_lock = 1;
1278
1279 /* here we cannot guarantee the inodes haven't just been
1280 * changed, so check if they are nested again */
1281 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino,
1282 old_inode->i_ino);
1283 if (status < 0) {
1284 mlog_errno(status);
1285 goto bail;
1286 } else if (status == 1) {
1287 status = -EPERM;
1288 trace_ocfs2_rename_not_permitted(
1289 (unsigned long long)old_inode->i_ino,
1290 (unsigned long long)new_dir->i_ino);
1291 goto bail;
1292 }
1293 }
1294
1295 /* if old and new are the same, this'll just do one lock. */
1296 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1297 &new_dir_bh, new_dir, 1);
1298 if (status < 0) {
1299 mlog_errno(status);
1300 goto bail;
1301 }
1302 parents_locked = 1;
1303
1304 if (!new_dir->i_nlink) {
1305 status = -EACCES;
1306 goto bail;
1307 }
1308
1309 /* make sure both dirs have bhs
1310 * get an extra ref on old_dir_bh if old==new */
1311 if (!new_dir_bh) {
1312 if (old_dir_bh) {
1313 new_dir_bh = old_dir_bh;
1314 get_bh(new_dir_bh);
1315 } else {
1316 mlog(ML_ERROR, "no old_dir_bh!\n");
1317 status = -EIO;
1318 goto bail;
1319 }
1320 }
1321
1322 /*
1323 * Aside from allowing a meta data update, the locking here
1324 * also ensures that the downconvert thread on other nodes
1325 * won't have to concurrently downconvert the inode and the
1326 * dentry locks.
1327 */
1328 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1329 OI_LS_PARENT);
1330 if (status < 0) {
1331 if (status != -ENOENT)
1332 mlog_errno(status);
1333 goto bail;
1334 }
1335 old_child_locked = 1;
1336
1337 status = ocfs2_remote_dentry_delete(old_dentry);
1338 if (status < 0) {
1339 mlog_errno(status);
1340 goto bail;
1341 }
1342
1343 if (S_ISDIR(old_inode->i_mode)) {
1344 u64 old_inode_parent;
1345
1346 update_dot_dot = 1;
1347 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1348 old_inode,
1349 &old_inode_dot_dot_res);
1350 if (status) {
1351 status = -EIO;
1352 goto bail;
1353 }
1354
1355 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1356 status = -EIO;
1357 goto bail;
1358 }
1359
1360 if (!new_inode && new_dir != old_dir &&
1361 new_dir->i_nlink >= ocfs2_link_max(osb)) {
1362 status = -EMLINK;
1363 goto bail;
1364 }
1365 }
1366
1367 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1368 old_dentry->d_name.len,
1369 &old_de_ino);
1370 if (status) {
1371 status = -ENOENT;
1372 goto bail;
1373 }
1374
1375 /*
1376 * Check for inode number is _not_ due to possible IO errors.
1377 * We might rmdir the source, keep it as pwd of some process
1378 * and merrily kill the link to whatever was created under the
1379 * same name. Goodbye sticky bit ;-<
1380 */
1381 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1382 status = -ENOENT;
1383 goto bail;
1384 }
1385
1386 /* check if the target already exists (in which case we need
1387 * to delete it */
1388 status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1389 new_dentry->d_name.len,
1390 &newfe_blkno, new_dir,
1391 &target_lookup_res);
1392 /* The only error we allow here is -ENOENT because the new
1393 * file not existing is perfectly valid. */
1394 if ((status < 0) && (status != -ENOENT)) {
1395 /* If we cannot find the file specified we should just */
1396 /* return the error... */
1397 mlog_errno(status);
1398 goto bail;
1399 }
1400 if (status == 0)
1401 target_exists = 1;
1402
1403 if (!target_exists && new_inode) {
1404 /*
1405 * Target was unlinked by another node while we were
1406 * waiting to get to ocfs2_rename(). There isn't
1407 * anything we can do here to help the situation, so
1408 * bubble up the appropriate error.
1409 */
1410 status = -ENOENT;
1411 goto bail;
1412 }
1413
1414 /* In case we need to overwrite an existing file, we blow it
1415 * away first */
1416 if (target_exists) {
1417 /* VFS didn't think there existed an inode here, but
1418 * someone else in the cluster must have raced our
1419 * rename to create one. Today we error cleanly, in
1420 * the future we should consider calling iget to build
1421 * a new struct inode for this entry. */
1422 if (!new_inode) {
1423 status = -EACCES;
1424
1425 trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1426 new_dentry->d_name.name);
1427 goto bail;
1428 }
1429
1430 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1431 status = -EACCES;
1432
1433 trace_ocfs2_rename_disagree(
1434 (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1435 (unsigned long long)newfe_blkno,
1436 OCFS2_I(new_inode)->ip_flags);
1437 goto bail;
1438 }
1439
1440 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1441 if (status < 0) {
1442 if (status != -ENOENT)
1443 mlog_errno(status);
1444 goto bail;
1445 }
1446 new_child_locked = 1;
1447
1448 status = ocfs2_remote_dentry_delete(new_dentry);
1449 if (status < 0) {
1450 mlog_errno(status);
1451 goto bail;
1452 }
1453
1454 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1455
1456 trace_ocfs2_rename_over_existing(
1457 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1458 (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1459
1460 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1461 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1462 OCFS2_I(new_inode)->ip_blkno,
1463 orphan_name, &orphan_insert,
1464 false);
1465 if (status < 0) {
1466 mlog_errno(status);
1467 goto bail;
1468 }
1469 should_add_orphan = true;
1470 }
1471 } else {
1472 BUG_ON(d_inode(new_dentry->d_parent) != new_dir);
1473
1474 status = ocfs2_check_dir_for_entry(new_dir,
1475 new_dentry->d_name.name,
1476 new_dentry->d_name.len);
1477 if (status)
1478 goto bail;
1479
1480 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1481 new_dentry->d_name.name,
1482 new_dentry->d_name.len,
1483 &target_insert);
1484 if (status < 0) {
1485 mlog_errno(status);
1486 goto bail;
1487 }
1488 }
1489
1490 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1491 if (IS_ERR(handle)) {
1492 status = PTR_ERR(handle);
1493 handle = NULL;
1494 mlog_errno(status);
1495 goto bail;
1496 }
1497
1498 if (target_exists) {
1499 if (S_ISDIR(new_inode->i_mode)) {
1500 if (new_inode->i_nlink != 2 ||
1501 !ocfs2_empty_dir(new_inode)) {
1502 status = -ENOTEMPTY;
1503 goto bail;
1504 }
1505 }
1506 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1507 newfe_bh,
1508 OCFS2_JOURNAL_ACCESS_WRITE);
1509 if (status < 0) {
1510 mlog_errno(status);
1511 goto bail;
1512 }
1513
1514 /* change the dirent to point to the correct inode */
1515 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1516 old_inode);
1517 if (status < 0) {
1518 mlog_errno(status);
1519 goto bail;
1520 }
1521 new_dir->i_version++;
1522
1523 if (S_ISDIR(new_inode->i_mode))
1524 ocfs2_set_links_count(newfe, 0);
1525 else
1526 ocfs2_add_links_count(newfe, -1);
1527 ocfs2_journal_dirty(handle, newfe_bh);
1528 if (should_add_orphan) {
1529 status = ocfs2_orphan_add(osb, handle, new_inode,
1530 newfe_bh, orphan_name,
1531 &orphan_insert, orphan_dir, false);
1532 if (status < 0) {
1533 mlog_errno(status);
1534 goto bail;
1535 }
1536 }
1537 } else {
1538 /* if the name was not found in new_dir, add it now */
1539 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1540 OCFS2_I(old_inode)->ip_blkno,
1541 new_dir_bh, &target_insert);
1542 }
1543
1544 old_inode->i_ctime = current_time(old_inode);
1545 mark_inode_dirty(old_inode);
1546
1547 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1548 old_inode_bh,
1549 OCFS2_JOURNAL_ACCESS_WRITE);
1550 if (status >= 0) {
1551 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1552
1553 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1554 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1555 ocfs2_journal_dirty(handle, old_inode_bh);
1556 } else
1557 mlog_errno(status);
1558
1559 /*
1560 * Now that the name has been added to new_dir, remove the old name.
1561 *
1562 * We don't keep any directory entry context around until now
1563 * because the insert might have changed the type of directory
1564 * we're dealing with.
1565 */
1566 status = ocfs2_find_entry(old_dentry->d_name.name,
1567 old_dentry->d_name.len, old_dir,
1568 &old_entry_lookup);
1569 if (status) {
1570 if (!is_journal_aborted(osb->journal->j_journal)) {
1571 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1572 "is not deleted.",
1573 new_dentry->d_name.len, new_dentry->d_name.name,
1574 old_dentry->d_name.len, old_dentry->d_name.name);
1575 }
1576 goto bail;
1577 }
1578
1579 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1580 if (status < 0) {
1581 mlog_errno(status);
1582 if (!is_journal_aborted(osb->journal->j_journal)) {
1583 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1584 "is not deleted.",
1585 new_dentry->d_name.len, new_dentry->d_name.name,
1586 old_dentry->d_name.len, old_dentry->d_name.name);
1587 }
1588 goto bail;
1589 }
1590
1591 if (new_inode) {
1592 drop_nlink(new_inode);
1593 new_inode->i_ctime = current_time(new_inode);
1594 }
1595 old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir);
1596
1597 if (update_dot_dot) {
1598 status = ocfs2_update_entry(old_inode, handle,
1599 &old_inode_dot_dot_res, new_dir);
1600 drop_nlink(old_dir);
1601 if (new_inode) {
1602 drop_nlink(new_inode);
1603 } else {
1604 inc_nlink(new_dir);
1605 mark_inode_dirty(new_dir);
1606 }
1607 }
1608 mark_inode_dirty(old_dir);
1609 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1610 if (new_inode) {
1611 mark_inode_dirty(new_inode);
1612 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1613 }
1614
1615 if (old_dir != new_dir) {
1616 /* Keep the same times on both directories.*/
1617 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1618
1619 /*
1620 * This will also pick up the i_nlink change from the
1621 * block above.
1622 */
1623 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1624 }
1625
1626 if (old_dir_nlink != old_dir->i_nlink) {
1627 if (!old_dir_bh) {
1628 mlog(ML_ERROR, "need to change nlink for old dir "
1629 "%llu from %d to %d but bh is NULL!\n",
1630 (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1631 (int)old_dir_nlink, old_dir->i_nlink);
1632 } else {
1633 struct ocfs2_dinode *fe;
1634 status = ocfs2_journal_access_di(handle,
1635 INODE_CACHE(old_dir),
1636 old_dir_bh,
1637 OCFS2_JOURNAL_ACCESS_WRITE);
1638 fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1639 ocfs2_set_links_count(fe, old_dir->i_nlink);
1640 ocfs2_journal_dirty(handle, old_dir_bh);
1641 }
1642 }
1643 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1644 status = 0;
1645 bail:
1646 if (handle)
1647 ocfs2_commit_trans(osb, handle);
1648
1649 if (orphan_dir) {
1650 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1651 ocfs2_inode_unlock(orphan_dir, 1);
1652 inode_unlock(orphan_dir);
1653 iput(orphan_dir);
1654 }
1655
1656 if (new_child_locked)
1657 ocfs2_inode_unlock(new_inode, 1);
1658
1659 if (old_child_locked)
1660 ocfs2_inode_unlock(old_inode, 1);
1661
1662 if (parents_locked)
1663 ocfs2_double_unlock(old_dir, new_dir);
1664
1665 if (rename_lock)
1666 ocfs2_rename_unlock(osb);
1667
1668 if (new_inode)
1669 sync_mapping_buffers(old_inode->i_mapping);
1670
1671 iput(new_inode);
1672
1673 ocfs2_free_dir_lookup_result(&target_lookup_res);
1674 ocfs2_free_dir_lookup_result(&old_entry_lookup);
1675 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1676 ocfs2_free_dir_lookup_result(&orphan_insert);
1677 ocfs2_free_dir_lookup_result(&target_insert);
1678
1679 brelse(newfe_bh);
1680 brelse(old_inode_bh);
1681 brelse(old_dir_bh);
1682 brelse(new_dir_bh);
1683
1684 if (status)
1685 mlog_errno(status);
1686
1687 return status;
1688 }
1689
1690 /*
1691 * we expect i_size = strlen(symname). Copy symname into the file
1692 * data, including the null terminator.
1693 */
1694 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1695 handle_t *handle,
1696 struct inode *inode,
1697 const char *symname)
1698 {
1699 struct buffer_head **bhs = NULL;
1700 const char *c;
1701 struct super_block *sb = osb->sb;
1702 u64 p_blkno, p_blocks;
1703 int virtual, blocks, status, i, bytes_left;
1704
1705 bytes_left = i_size_read(inode) + 1;
1706 /* we can't trust i_blocks because we're actually going to
1707 * write i_size + 1 bytes. */
1708 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1709
1710 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1711 i_size_read(inode), blocks);
1712
1713 /* Sanity check -- make sure we're going to fit. */
1714 if (bytes_left >
1715 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1716 status = -EIO;
1717 mlog_errno(status);
1718 goto bail;
1719 }
1720
1721 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1722 if (!bhs) {
1723 status = -ENOMEM;
1724 mlog_errno(status);
1725 goto bail;
1726 }
1727
1728 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1729 NULL);
1730 if (status < 0) {
1731 mlog_errno(status);
1732 goto bail;
1733 }
1734
1735 /* links can never be larger than one cluster so we know this
1736 * is all going to be contiguous, but do a sanity check
1737 * anyway. */
1738 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1739 status = -EIO;
1740 mlog_errno(status);
1741 goto bail;
1742 }
1743
1744 virtual = 0;
1745 while(bytes_left > 0) {
1746 c = &symname[virtual * sb->s_blocksize];
1747
1748 bhs[virtual] = sb_getblk(sb, p_blkno);
1749 if (!bhs[virtual]) {
1750 status = -ENOMEM;
1751 mlog_errno(status);
1752 goto bail;
1753 }
1754 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1755 bhs[virtual]);
1756
1757 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1758 bhs[virtual],
1759 OCFS2_JOURNAL_ACCESS_CREATE);
1760 if (status < 0) {
1761 mlog_errno(status);
1762 goto bail;
1763 }
1764
1765 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1766
1767 memcpy(bhs[virtual]->b_data, c,
1768 (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1769 bytes_left);
1770
1771 ocfs2_journal_dirty(handle, bhs[virtual]);
1772
1773 virtual++;
1774 p_blkno++;
1775 bytes_left -= sb->s_blocksize;
1776 }
1777
1778 status = 0;
1779 bail:
1780
1781 if (bhs) {
1782 for(i = 0; i < blocks; i++)
1783 brelse(bhs[i]);
1784 kfree(bhs);
1785 }
1786
1787 if (status)
1788 mlog_errno(status);
1789 return status;
1790 }
1791
1792 static int ocfs2_symlink(struct inode *dir,
1793 struct dentry *dentry,
1794 const char *symname)
1795 {
1796 int status, l, credits;
1797 u64 newsize;
1798 struct ocfs2_super *osb = NULL;
1799 struct inode *inode = NULL;
1800 struct super_block *sb;
1801 struct buffer_head *new_fe_bh = NULL;
1802 struct buffer_head *parent_fe_bh = NULL;
1803 struct ocfs2_dinode *fe = NULL;
1804 struct ocfs2_dinode *dirfe;
1805 handle_t *handle = NULL;
1806 struct ocfs2_alloc_context *inode_ac = NULL;
1807 struct ocfs2_alloc_context *data_ac = NULL;
1808 struct ocfs2_alloc_context *xattr_ac = NULL;
1809 int want_clusters = 0;
1810 int xattr_credits = 0;
1811 struct ocfs2_security_xattr_info si = {
1812 .enable = 1,
1813 };
1814 int did_quota = 0, did_quota_inode = 0;
1815 struct ocfs2_dir_lookup_result lookup = { NULL, };
1816 sigset_t oldset;
1817 int did_block_signals = 0;
1818 struct ocfs2_dentry_lock *dl = NULL;
1819
1820 trace_ocfs2_symlink_begin(dir, dentry, symname,
1821 dentry->d_name.len, dentry->d_name.name);
1822
1823 status = dquot_initialize(dir);
1824 if (status) {
1825 mlog_errno(status);
1826 goto bail;
1827 }
1828
1829 sb = dir->i_sb;
1830 osb = OCFS2_SB(sb);
1831
1832 l = strlen(symname) + 1;
1833
1834 credits = ocfs2_calc_symlink_credits(sb);
1835
1836 /* lock the parent directory */
1837 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1838 if (status < 0) {
1839 if (status != -ENOENT)
1840 mlog_errno(status);
1841 return status;
1842 }
1843
1844 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1845 if (!ocfs2_read_links_count(dirfe)) {
1846 /* can't make a file in a deleted directory. */
1847 status = -ENOENT;
1848 goto bail;
1849 }
1850
1851 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1852 dentry->d_name.len);
1853 if (status)
1854 goto bail;
1855
1856 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1857 dentry->d_name.name,
1858 dentry->d_name.len, &lookup);
1859 if (status < 0) {
1860 mlog_errno(status);
1861 goto bail;
1862 }
1863
1864 status = ocfs2_reserve_new_inode(osb, &inode_ac);
1865 if (status < 0) {
1866 if (status != -ENOSPC)
1867 mlog_errno(status);
1868 goto bail;
1869 }
1870
1871 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1872 if (IS_ERR(inode)) {
1873 status = PTR_ERR(inode);
1874 inode = NULL;
1875 mlog_errno(status);
1876 goto bail;
1877 }
1878
1879 /* get security xattr */
1880 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1881 if (status) {
1882 if (status == -EOPNOTSUPP)
1883 si.enable = 0;
1884 else {
1885 mlog_errno(status);
1886 goto bail;
1887 }
1888 }
1889
1890 /* calculate meta data/clusters for setting security xattr */
1891 if (si.enable) {
1892 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1893 &xattr_credits, &xattr_ac);
1894 if (status < 0) {
1895 mlog_errno(status);
1896 goto bail;
1897 }
1898 }
1899
1900 /* don't reserve bitmap space for fast symlinks. */
1901 if (l > ocfs2_fast_symlink_chars(sb))
1902 want_clusters += 1;
1903
1904 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1905 if (status < 0) {
1906 if (status != -ENOSPC)
1907 mlog_errno(status);
1908 goto bail;
1909 }
1910
1911 handle = ocfs2_start_trans(osb, credits + xattr_credits);
1912 if (IS_ERR(handle)) {
1913 status = PTR_ERR(handle);
1914 handle = NULL;
1915 mlog_errno(status);
1916 goto bail;
1917 }
1918
1919 /* Starting to change things, restart is no longer possible. */
1920 ocfs2_block_signals(&oldset);
1921 did_block_signals = 1;
1922
1923 status = dquot_alloc_inode(inode);
1924 if (status)
1925 goto bail;
1926 did_quota_inode = 1;
1927
1928 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1929 dentry->d_name.name,
1930 (unsigned long long)OCFS2_I(dir)->ip_blkno,
1931 inode->i_mode);
1932
1933 status = ocfs2_mknod_locked(osb, dir, inode,
1934 0, &new_fe_bh, parent_fe_bh, handle,
1935 inode_ac);
1936 if (status < 0) {
1937 mlog_errno(status);
1938 goto bail;
1939 }
1940
1941 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1942 inode->i_rdev = 0;
1943 newsize = l - 1;
1944 inode->i_op = &ocfs2_symlink_inode_operations;
1945 inode_nohighmem(inode);
1946 if (l > ocfs2_fast_symlink_chars(sb)) {
1947 u32 offset = 0;
1948
1949 status = dquot_alloc_space_nodirty(inode,
1950 ocfs2_clusters_to_bytes(osb->sb, 1));
1951 if (status)
1952 goto bail;
1953 did_quota = 1;
1954 inode->i_mapping->a_ops = &ocfs2_aops;
1955 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1956 new_fe_bh,
1957 handle, data_ac, NULL,
1958 NULL);
1959 if (status < 0) {
1960 if (status != -ENOSPC && status != -EINTR) {
1961 mlog(ML_ERROR,
1962 "Failed to extend file to %llu\n",
1963 (unsigned long long)newsize);
1964 mlog_errno(status);
1965 status = -ENOSPC;
1966 }
1967 goto bail;
1968 }
1969 i_size_write(inode, newsize);
1970 inode->i_blocks = ocfs2_inode_sector_count(inode);
1971 } else {
1972 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1973 memcpy((char *) fe->id2.i_symlink, symname, l);
1974 i_size_write(inode, newsize);
1975 inode->i_blocks = 0;
1976 }
1977
1978 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1979 if (status < 0) {
1980 mlog_errno(status);
1981 goto bail;
1982 }
1983
1984 if (!ocfs2_inode_is_fast_symlink(inode)) {
1985 status = ocfs2_create_symlink_data(osb, handle, inode,
1986 symname);
1987 if (status < 0) {
1988 mlog_errno(status);
1989 goto bail;
1990 }
1991 }
1992
1993 if (si.enable) {
1994 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1995 xattr_ac, data_ac);
1996 if (status < 0) {
1997 mlog_errno(status);
1998 goto bail;
1999 }
2000 }
2001
2002 /*
2003 * Do this before adding the entry to the directory. We add
2004 * also set d_op after success so that ->d_iput() will cleanup
2005 * the dentry lock even if ocfs2_add_entry() fails below.
2006 */
2007 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
2008 if (status) {
2009 mlog_errno(status);
2010 goto bail;
2011 }
2012
2013 dl = dentry->d_fsdata;
2014
2015 status = ocfs2_add_entry(handle, dentry, inode,
2016 le64_to_cpu(fe->i_blkno), parent_fe_bh,
2017 &lookup);
2018 if (status < 0) {
2019 mlog_errno(status);
2020 goto bail;
2021 }
2022
2023 insert_inode_hash(inode);
2024 d_instantiate(dentry, inode);
2025 bail:
2026 if (status < 0 && did_quota)
2027 dquot_free_space_nodirty(inode,
2028 ocfs2_clusters_to_bytes(osb->sb, 1));
2029 if (status < 0 && did_quota_inode)
2030 dquot_free_inode(inode);
2031 if (handle)
2032 ocfs2_commit_trans(osb, handle);
2033
2034 ocfs2_inode_unlock(dir, 1);
2035 if (did_block_signals)
2036 ocfs2_unblock_signals(&oldset);
2037
2038 brelse(new_fe_bh);
2039 brelse(parent_fe_bh);
2040 kfree(si.value);
2041 ocfs2_free_dir_lookup_result(&lookup);
2042 if (inode_ac)
2043 ocfs2_free_alloc_context(inode_ac);
2044 if (data_ac)
2045 ocfs2_free_alloc_context(data_ac);
2046 if (xattr_ac)
2047 ocfs2_free_alloc_context(xattr_ac);
2048 if ((status < 0) && inode) {
2049 if (dl)
2050 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2051
2052 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
2053 clear_nlink(inode);
2054 iput(inode);
2055 }
2056
2057 if (status)
2058 mlog_errno(status);
2059
2060 return status;
2061 }
2062
2063 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2064 {
2065 int status, namelen;
2066
2067 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2068 (long long)blkno);
2069 if (namelen <= 0) {
2070 if (namelen)
2071 status = namelen;
2072 else
2073 status = -EINVAL;
2074 mlog_errno(status);
2075 goto bail;
2076 }
2077 if (namelen != OCFS2_ORPHAN_NAMELEN) {
2078 status = -EINVAL;
2079 mlog_errno(status);
2080 goto bail;
2081 }
2082
2083 trace_ocfs2_blkno_stringify(blkno, name, namelen);
2084
2085 status = 0;
2086 bail:
2087 if (status < 0)
2088 mlog_errno(status);
2089 return status;
2090 }
2091
2092 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2093 struct inode **ret_orphan_dir,
2094 struct buffer_head **ret_orphan_dir_bh)
2095 {
2096 struct inode *orphan_dir_inode;
2097 struct buffer_head *orphan_dir_bh = NULL;
2098 int ret = 0;
2099
2100 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2101 ORPHAN_DIR_SYSTEM_INODE,
2102 osb->slot_num);
2103 if (!orphan_dir_inode) {
2104 ret = -ENOENT;
2105 mlog_errno(ret);
2106 return ret;
2107 }
2108
2109 inode_lock(orphan_dir_inode);
2110
2111 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2112 if (ret < 0) {
2113 inode_unlock(orphan_dir_inode);
2114 iput(orphan_dir_inode);
2115
2116 mlog_errno(ret);
2117 return ret;
2118 }
2119
2120 *ret_orphan_dir = orphan_dir_inode;
2121 *ret_orphan_dir_bh = orphan_dir_bh;
2122
2123 return 0;
2124 }
2125
2126 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2127 struct buffer_head *orphan_dir_bh,
2128 u64 blkno,
2129 char *name,
2130 struct ocfs2_dir_lookup_result *lookup,
2131 bool dio)
2132 {
2133 int ret;
2134 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2135 int namelen = dio ?
2136 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2137 OCFS2_ORPHAN_NAMELEN;
2138
2139 if (dio) {
2140 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2141 OCFS2_DIO_ORPHAN_PREFIX);
2142 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2143 ret = -EINVAL;
2144 mlog_errno(ret);
2145 return ret;
2146 }
2147
2148 ret = ocfs2_blkno_stringify(blkno,
2149 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2150 } else
2151 ret = ocfs2_blkno_stringify(blkno, name);
2152 if (ret < 0) {
2153 mlog_errno(ret);
2154 return ret;
2155 }
2156
2157 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2158 orphan_dir_bh, name,
2159 namelen, lookup);
2160 if (ret < 0) {
2161 mlog_errno(ret);
2162 return ret;
2163 }
2164
2165 return 0;
2166 }
2167
2168 /**
2169 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2170 * insertion of an orphan.
2171 * @osb: ocfs2 file system
2172 * @ret_orphan_dir: Orphan dir inode - returned locked!
2173 * @blkno: Actual block number of the inode to be inserted into orphan dir.
2174 * @lookup: dir lookup result, to be passed back into functions like
2175 * ocfs2_orphan_add
2176 *
2177 * Returns zero on success and the ret_orphan_dir, name and lookup
2178 * fields will be populated.
2179 *
2180 * Returns non-zero on failure.
2181 */
2182 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2183 struct inode **ret_orphan_dir,
2184 u64 blkno,
2185 char *name,
2186 struct ocfs2_dir_lookup_result *lookup,
2187 bool dio)
2188 {
2189 struct inode *orphan_dir_inode = NULL;
2190 struct buffer_head *orphan_dir_bh = NULL;
2191 int ret = 0;
2192
2193 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2194 &orphan_dir_bh);
2195 if (ret < 0) {
2196 mlog_errno(ret);
2197 return ret;
2198 }
2199
2200 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2201 blkno, name, lookup, dio);
2202 if (ret < 0) {
2203 mlog_errno(ret);
2204 goto out;
2205 }
2206
2207 *ret_orphan_dir = orphan_dir_inode;
2208
2209 out:
2210 brelse(orphan_dir_bh);
2211
2212 if (ret) {
2213 ocfs2_inode_unlock(orphan_dir_inode, 1);
2214 inode_unlock(orphan_dir_inode);
2215 iput(orphan_dir_inode);
2216 }
2217
2218 if (ret)
2219 mlog_errno(ret);
2220 return ret;
2221 }
2222
2223 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2224 handle_t *handle,
2225 struct inode *inode,
2226 struct buffer_head *fe_bh,
2227 char *name,
2228 struct ocfs2_dir_lookup_result *lookup,
2229 struct inode *orphan_dir_inode,
2230 bool dio)
2231 {
2232 struct buffer_head *orphan_dir_bh = NULL;
2233 int status = 0;
2234 struct ocfs2_dinode *orphan_fe;
2235 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2236 int namelen = dio ?
2237 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2238 OCFS2_ORPHAN_NAMELEN;
2239
2240 trace_ocfs2_orphan_add_begin(
2241 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2242
2243 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2244 if (status < 0) {
2245 mlog_errno(status);
2246 goto leave;
2247 }
2248
2249 status = ocfs2_journal_access_di(handle,
2250 INODE_CACHE(orphan_dir_inode),
2251 orphan_dir_bh,
2252 OCFS2_JOURNAL_ACCESS_WRITE);
2253 if (status < 0) {
2254 mlog_errno(status);
2255 goto leave;
2256 }
2257
2258 /*
2259 * We're going to journal the change of i_flags and i_orphaned_slot.
2260 * It's safe anyway, though some callers may duplicate the journaling.
2261 * Journaling within the func just make the logic look more
2262 * straightforward.
2263 */
2264 status = ocfs2_journal_access_di(handle,
2265 INODE_CACHE(inode),
2266 fe_bh,
2267 OCFS2_JOURNAL_ACCESS_WRITE);
2268 if (status < 0) {
2269 mlog_errno(status);
2270 goto leave;
2271 }
2272
2273 /* we're a cluster, and nlink can change on disk from
2274 * underneath us... */
2275 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2276 if (S_ISDIR(inode->i_mode))
2277 ocfs2_add_links_count(orphan_fe, 1);
2278 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2279 ocfs2_journal_dirty(handle, orphan_dir_bh);
2280
2281 status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2282 namelen, inode,
2283 OCFS2_I(inode)->ip_blkno,
2284 orphan_dir_bh, lookup);
2285 if (status < 0) {
2286 mlog_errno(status);
2287 goto rollback;
2288 }
2289
2290 if (dio) {
2291 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan
2292 * slot.
2293 */
2294 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2295 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num);
2296 } else {
2297 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2298 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2299
2300 /* Record which orphan dir our inode now resides
2301 * in. delete_inode will use this to determine which orphan
2302 * dir to lock. */
2303 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2304 }
2305
2306 ocfs2_journal_dirty(handle, fe_bh);
2307
2308 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2309 osb->slot_num);
2310
2311 rollback:
2312 if (status < 0) {
2313 if (S_ISDIR(inode->i_mode))
2314 ocfs2_add_links_count(orphan_fe, -1);
2315 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2316 }
2317
2318 leave:
2319 brelse(orphan_dir_bh);
2320
2321 return status;
2322 }
2323
2324 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2325 int ocfs2_orphan_del(struct ocfs2_super *osb,
2326 handle_t *handle,
2327 struct inode *orphan_dir_inode,
2328 struct inode *inode,
2329 struct buffer_head *orphan_dir_bh,
2330 bool dio)
2331 {
2332 const int namelen = OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN;
2333 char name[namelen + 1];
2334 struct ocfs2_dinode *orphan_fe;
2335 int status = 0;
2336 struct ocfs2_dir_lookup_result lookup = { NULL, };
2337
2338 if (dio) {
2339 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2340 OCFS2_DIO_ORPHAN_PREFIX);
2341 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2342 status = -EINVAL;
2343 mlog_errno(status);
2344 return status;
2345 }
2346
2347 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno,
2348 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2349 } else
2350 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2351 if (status < 0) {
2352 mlog_errno(status);
2353 goto leave;
2354 }
2355
2356 trace_ocfs2_orphan_del(
2357 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2358 name, strlen(name));
2359
2360 status = ocfs2_journal_access_di(handle,
2361 INODE_CACHE(orphan_dir_inode),
2362 orphan_dir_bh,
2363 OCFS2_JOURNAL_ACCESS_WRITE);
2364 if (status < 0) {
2365 mlog_errno(status);
2366 goto leave;
2367 }
2368
2369 /* find it's spot in the orphan directory */
2370 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode,
2371 &lookup);
2372 if (status) {
2373 mlog_errno(status);
2374 goto leave;
2375 }
2376
2377 /* remove it from the orphan directory */
2378 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2379 if (status < 0) {
2380 mlog_errno(status);
2381 goto leave;
2382 }
2383
2384 /* do the i_nlink dance! :) */
2385 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2386 if (S_ISDIR(inode->i_mode))
2387 ocfs2_add_links_count(orphan_fe, -1);
2388 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2389 ocfs2_journal_dirty(handle, orphan_dir_bh);
2390
2391 leave:
2392 ocfs2_free_dir_lookup_result(&lookup);
2393
2394 if (status)
2395 mlog_errno(status);
2396 return status;
2397 }
2398
2399 /**
2400 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2401 * allocated file. This is different from the typical 'add to orphan dir'
2402 * operation in that the inode does not yet exist. This is a problem because
2403 * the orphan dir stringifies the inode block number to come up with it's
2404 * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2405 * problem. This function works around it by calling deeper into the orphan
2406 * and suballoc code than other callers. Use this only by necessity.
2407 * @dir: The directory which this inode will ultimately wind up under - not the
2408 * orphan dir!
2409 * @dir_bh: buffer_head the @dir inode block
2410 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2411 * with the string to be used for orphan dirent. Pass back to the orphan dir
2412 * code.
2413 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2414 * dir code.
2415 * @ret_di_blkno: block number where the new inode will be allocated.
2416 * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2417 * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2418 *
2419 * Returns zero on success and the ret_orphan_dir, name and lookup
2420 * fields will be populated.
2421 *
2422 * Returns non-zero on failure.
2423 */
2424 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2425 struct buffer_head *dir_bh,
2426 char *orphan_name,
2427 struct inode **ret_orphan_dir,
2428 u64 *ret_di_blkno,
2429 struct ocfs2_dir_lookup_result *orphan_insert,
2430 struct ocfs2_alloc_context **ret_inode_ac)
2431 {
2432 int ret;
2433 u64 di_blkno;
2434 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2435 struct inode *orphan_dir = NULL;
2436 struct buffer_head *orphan_dir_bh = NULL;
2437 struct ocfs2_alloc_context *inode_ac = NULL;
2438
2439 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2440 if (ret < 0) {
2441 mlog_errno(ret);
2442 return ret;
2443 }
2444
2445 /* reserve an inode spot */
2446 ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2447 if (ret < 0) {
2448 if (ret != -ENOSPC)
2449 mlog_errno(ret);
2450 goto out;
2451 }
2452
2453 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2454 &di_blkno);
2455 if (ret) {
2456 mlog_errno(ret);
2457 goto out;
2458 }
2459
2460 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2461 di_blkno, orphan_name, orphan_insert,
2462 false);
2463 if (ret < 0) {
2464 mlog_errno(ret);
2465 goto out;
2466 }
2467
2468 out:
2469 if (ret == 0) {
2470 *ret_orphan_dir = orphan_dir;
2471 *ret_di_blkno = di_blkno;
2472 *ret_inode_ac = inode_ac;
2473 /*
2474 * orphan_name and orphan_insert are already up to
2475 * date via prepare_orphan_dir
2476 */
2477 } else {
2478 /* Unroll reserve_new_inode* */
2479 if (inode_ac)
2480 ocfs2_free_alloc_context(inode_ac);
2481
2482 /* Unroll orphan dir locking */
2483 inode_unlock(orphan_dir);
2484 ocfs2_inode_unlock(orphan_dir, 1);
2485 iput(orphan_dir);
2486 }
2487
2488 brelse(orphan_dir_bh);
2489
2490 return ret;
2491 }
2492
2493 int ocfs2_create_inode_in_orphan(struct inode *dir,
2494 int mode,
2495 struct inode **new_inode)
2496 {
2497 int status, did_quota_inode = 0;
2498 struct inode *inode = NULL;
2499 struct inode *orphan_dir = NULL;
2500 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2501 struct ocfs2_dinode *di = NULL;
2502 handle_t *handle = NULL;
2503 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2504 struct buffer_head *parent_di_bh = NULL;
2505 struct buffer_head *new_di_bh = NULL;
2506 struct ocfs2_alloc_context *inode_ac = NULL;
2507 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2508 u64 uninitialized_var(di_blkno), suballoc_loc;
2509 u16 suballoc_bit;
2510
2511 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2512 if (status < 0) {
2513 if (status != -ENOENT)
2514 mlog_errno(status);
2515 return status;
2516 }
2517
2518 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2519 orphan_name, &orphan_dir,
2520 &di_blkno, &orphan_insert, &inode_ac);
2521 if (status < 0) {
2522 if (status != -ENOSPC)
2523 mlog_errno(status);
2524 goto leave;
2525 }
2526
2527 inode = ocfs2_get_init_inode(dir, mode);
2528 if (IS_ERR(inode)) {
2529 status = PTR_ERR(inode);
2530 inode = NULL;
2531 mlog_errno(status);
2532 goto leave;
2533 }
2534
2535 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2536 if (IS_ERR(handle)) {
2537 status = PTR_ERR(handle);
2538 handle = NULL;
2539 mlog_errno(status);
2540 goto leave;
2541 }
2542
2543 status = dquot_alloc_inode(inode);
2544 if (status)
2545 goto leave;
2546 did_quota_inode = 1;
2547
2548 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2549 &suballoc_loc,
2550 &suballoc_bit, di_blkno);
2551 if (status < 0) {
2552 mlog_errno(status);
2553 goto leave;
2554 }
2555
2556 clear_nlink(inode);
2557 /* do the real work now. */
2558 status = __ocfs2_mknod_locked(dir, inode,
2559 0, &new_di_bh, parent_di_bh, handle,
2560 inode_ac, di_blkno, suballoc_loc,
2561 suballoc_bit);
2562 if (status < 0) {
2563 mlog_errno(status);
2564 goto leave;
2565 }
2566
2567 di = (struct ocfs2_dinode *)new_di_bh->b_data;
2568 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2569 &orphan_insert, orphan_dir, false);
2570 if (status < 0) {
2571 mlog_errno(status);
2572 goto leave;
2573 }
2574
2575 /* get open lock so that only nodes can't remove it from orphan dir. */
2576 status = ocfs2_open_lock(inode);
2577 if (status < 0)
2578 mlog_errno(status);
2579
2580 insert_inode_hash(inode);
2581 leave:
2582 if (status < 0 && did_quota_inode)
2583 dquot_free_inode(inode);
2584 if (handle)
2585 ocfs2_commit_trans(osb, handle);
2586
2587 if (orphan_dir) {
2588 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2589 ocfs2_inode_unlock(orphan_dir, 1);
2590 inode_unlock(orphan_dir);
2591 iput(orphan_dir);
2592 }
2593
2594 if ((status < 0) && inode) {
2595 clear_nlink(inode);
2596 iput(inode);
2597 }
2598
2599 if (inode_ac)
2600 ocfs2_free_alloc_context(inode_ac);
2601
2602 brelse(new_di_bh);
2603
2604 if (!status)
2605 *new_inode = inode;
2606
2607 ocfs2_free_dir_lookup_result(&orphan_insert);
2608
2609 ocfs2_inode_unlock(dir, 1);
2610 brelse(parent_di_bh);
2611 return status;
2612 }
2613
2614 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
2615 struct inode *inode)
2616 {
2617 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2618 struct inode *orphan_dir_inode = NULL;
2619 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2620 struct buffer_head *di_bh = NULL;
2621 int status = 0;
2622 handle_t *handle = NULL;
2623 struct ocfs2_dinode *di = NULL;
2624
2625 status = ocfs2_inode_lock(inode, &di_bh, 1);
2626 if (status < 0) {
2627 mlog_errno(status);
2628 goto bail;
2629 }
2630
2631 di = (struct ocfs2_dinode *) di_bh->b_data;
2632 /*
2633 * Another append dio crashed?
2634 * If so, manually recover it first.
2635 */
2636 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
2637 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode));
2638 if (status < 0) {
2639 if (status != -ENOSPC)
2640 mlog_errno(status);
2641 goto bail_unlock_inode;
2642 }
2643
2644 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0);
2645 if (status < 0) {
2646 mlog_errno(status);
2647 goto bail_unlock_inode;
2648 }
2649 }
2650
2651 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
2652 OCFS2_I(inode)->ip_blkno,
2653 orphan_name,
2654 &orphan_insert,
2655 true);
2656 if (status < 0) {
2657 mlog_errno(status);
2658 goto bail_unlock_inode;
2659 }
2660
2661 handle = ocfs2_start_trans(osb,
2662 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS);
2663 if (IS_ERR(handle)) {
2664 status = PTR_ERR(handle);
2665 goto bail_unlock_orphan;
2666 }
2667
2668 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
2669 &orphan_insert, orphan_dir_inode, true);
2670 if (status)
2671 mlog_errno(status);
2672
2673 ocfs2_commit_trans(osb, handle);
2674
2675 bail_unlock_orphan:
2676 ocfs2_inode_unlock(orphan_dir_inode, 1);
2677 inode_unlock(orphan_dir_inode);
2678 iput(orphan_dir_inode);
2679
2680 ocfs2_free_dir_lookup_result(&orphan_insert);
2681
2682 bail_unlock_inode:
2683 ocfs2_inode_unlock(inode, 1);
2684 brelse(di_bh);
2685
2686 bail:
2687 return status;
2688 }
2689
2690 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
2691 struct inode *inode, struct buffer_head *di_bh,
2692 int update_isize, loff_t end)
2693 {
2694 struct inode *orphan_dir_inode = NULL;
2695 struct buffer_head *orphan_dir_bh = NULL;
2696 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2697 handle_t *handle = NULL;
2698 int status = 0;
2699
2700 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2701 ORPHAN_DIR_SYSTEM_INODE,
2702 le16_to_cpu(di->i_dio_orphaned_slot));
2703 if (!orphan_dir_inode) {
2704 status = -ENOENT;
2705 mlog_errno(status);
2706 goto bail;
2707 }
2708
2709 inode_lock(orphan_dir_inode);
2710 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2711 if (status < 0) {
2712 inode_unlock(orphan_dir_inode);
2713 iput(orphan_dir_inode);
2714 mlog_errno(status);
2715 goto bail;
2716 }
2717
2718 handle = ocfs2_start_trans(osb,
2719 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS);
2720 if (IS_ERR(handle)) {
2721 status = PTR_ERR(handle);
2722 goto bail_unlock_orphan;
2723 }
2724
2725 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)));
2726
2727 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
2728 inode, orphan_dir_bh, true);
2729 if (status < 0) {
2730 mlog_errno(status);
2731 goto bail_commit;
2732 }
2733
2734 status = ocfs2_journal_access_di(handle,
2735 INODE_CACHE(inode),
2736 di_bh,
2737 OCFS2_JOURNAL_ACCESS_WRITE);
2738 if (status < 0) {
2739 mlog_errno(status);
2740 goto bail_commit;
2741 }
2742
2743 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2744 di->i_dio_orphaned_slot = 0;
2745
2746 if (update_isize) {
2747 status = ocfs2_set_inode_size(handle, inode, di_bh, end);
2748 if (status)
2749 mlog_errno(status);
2750 } else
2751 ocfs2_journal_dirty(handle, di_bh);
2752
2753 bail_commit:
2754 ocfs2_commit_trans(osb, handle);
2755
2756 bail_unlock_orphan:
2757 ocfs2_inode_unlock(orphan_dir_inode, 1);
2758 inode_unlock(orphan_dir_inode);
2759 brelse(orphan_dir_bh);
2760 iput(orphan_dir_inode);
2761
2762 bail:
2763 return status;
2764 }
2765
2766 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2767 struct inode *inode,
2768 struct dentry *dentry)
2769 {
2770 int status = 0;
2771 struct buffer_head *parent_di_bh = NULL;
2772 handle_t *handle = NULL;
2773 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2774 struct ocfs2_dinode *dir_di, *di;
2775 struct inode *orphan_dir_inode = NULL;
2776 struct buffer_head *orphan_dir_bh = NULL;
2777 struct buffer_head *di_bh = NULL;
2778 struct ocfs2_dir_lookup_result lookup = { NULL, };
2779
2780 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2781 dentry->d_name.len, dentry->d_name.name,
2782 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2783 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2784
2785 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2786 if (status < 0) {
2787 if (status != -ENOENT)
2788 mlog_errno(status);
2789 return status;
2790 }
2791
2792 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2793 if (!dir_di->i_links_count) {
2794 /* can't make a file in a deleted directory. */
2795 status = -ENOENT;
2796 goto leave;
2797 }
2798
2799 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2800 dentry->d_name.len);
2801 if (status)
2802 goto leave;
2803
2804 /* get a spot inside the dir. */
2805 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2806 dentry->d_name.name,
2807 dentry->d_name.len, &lookup);
2808 if (status < 0) {
2809 mlog_errno(status);
2810 goto leave;
2811 }
2812
2813 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2814 ORPHAN_DIR_SYSTEM_INODE,
2815 osb->slot_num);
2816 if (!orphan_dir_inode) {
2817 status = -ENOENT;
2818 mlog_errno(status);
2819 goto leave;
2820 }
2821
2822 inode_lock(orphan_dir_inode);
2823
2824 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2825 if (status < 0) {
2826 mlog_errno(status);
2827 inode_unlock(orphan_dir_inode);
2828 iput(orphan_dir_inode);
2829 goto leave;
2830 }
2831
2832 status = ocfs2_read_inode_block(inode, &di_bh);
2833 if (status < 0) {
2834 mlog_errno(status);
2835 goto orphan_unlock;
2836 }
2837
2838 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2839 if (IS_ERR(handle)) {
2840 status = PTR_ERR(handle);
2841 handle = NULL;
2842 mlog_errno(status);
2843 goto orphan_unlock;
2844 }
2845
2846 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2847 di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2848 if (status < 0) {
2849 mlog_errno(status);
2850 goto out_commit;
2851 }
2852
2853 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2854 orphan_dir_bh, false);
2855 if (status < 0) {
2856 mlog_errno(status);
2857 goto out_commit;
2858 }
2859
2860 di = (struct ocfs2_dinode *)di_bh->b_data;
2861 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2862 di->i_orphaned_slot = 0;
2863 set_nlink(inode, 1);
2864 ocfs2_set_links_count(di, inode->i_nlink);
2865 ocfs2_update_inode_fsync_trans(handle, inode, 1);
2866 ocfs2_journal_dirty(handle, di_bh);
2867
2868 status = ocfs2_add_entry(handle, dentry, inode,
2869 OCFS2_I(inode)->ip_blkno, parent_di_bh,
2870 &lookup);
2871 if (status < 0) {
2872 mlog_errno(status);
2873 goto out_commit;
2874 }
2875
2876 status = ocfs2_dentry_attach_lock(dentry, inode,
2877 OCFS2_I(dir)->ip_blkno);
2878 if (status) {
2879 mlog_errno(status);
2880 goto out_commit;
2881 }
2882
2883 d_instantiate(dentry, inode);
2884 status = 0;
2885 out_commit:
2886 ocfs2_commit_trans(osb, handle);
2887 orphan_unlock:
2888 ocfs2_inode_unlock(orphan_dir_inode, 1);
2889 inode_unlock(orphan_dir_inode);
2890 iput(orphan_dir_inode);
2891 leave:
2892
2893 ocfs2_inode_unlock(dir, 1);
2894
2895 brelse(di_bh);
2896 brelse(parent_di_bh);
2897 brelse(orphan_dir_bh);
2898
2899 ocfs2_free_dir_lookup_result(&lookup);
2900
2901 if (status)
2902 mlog_errno(status);
2903
2904 return status;
2905 }
2906
2907 const struct inode_operations ocfs2_dir_iops = {
2908 .create = ocfs2_create,
2909 .lookup = ocfs2_lookup,
2910 .link = ocfs2_link,
2911 .unlink = ocfs2_unlink,
2912 .rmdir = ocfs2_unlink,
2913 .symlink = ocfs2_symlink,
2914 .mkdir = ocfs2_mkdir,
2915 .mknod = ocfs2_mknod,
2916 .rename = ocfs2_rename,
2917 .setattr = ocfs2_setattr,
2918 .getattr = ocfs2_getattr,
2919 .permission = ocfs2_permission,
2920 .setxattr = generic_setxattr,
2921 .getxattr = generic_getxattr,
2922 .listxattr = ocfs2_listxattr,
2923 .removexattr = generic_removexattr,
2924 .fiemap = ocfs2_fiemap,
2925 .get_acl = ocfs2_iop_get_acl,
2926 .set_acl = ocfs2_iop_set_acl,
2927 };
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