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Linux 4.3-rc5
[linux/fpc-iii.git] / fs / ocfs2 / namei.c
blobb7dfac226b1e2dc517877c9402832abf4cba3530
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 #define OCFS2_DIO_ORPHAN_PREFIX "dio-"
110 #define OCFS2_DIO_ORPHAN_PREFIX_LEN 4
111
112 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
113 unsigned int flags)
114 {
115 int status;
116 u64 blkno;
117 struct inode *inode = NULL;
118 struct dentry *ret;
119 struct ocfs2_inode_info *oi;
120
121 trace_ocfs2_lookup(dir, dentry, dentry->d_name.len,
122 dentry->d_name.name,
123 (unsigned long long)OCFS2_I(dir)->ip_blkno, 0);
124
125 if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
126 ret = ERR_PTR(-ENAMETOOLONG);
127 goto bail;
128 }
129
130 status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
131 if (status < 0) {
132 if (status != -ENOENT)
133 mlog_errno(status);
134 ret = ERR_PTR(status);
135 goto bail;
136 }
137
138 status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
139 dentry->d_name.len, &blkno);
140 if (status < 0)
141 goto bail_add;
142
143 inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
144 if (IS_ERR(inode)) {
145 ret = ERR_PTR(-EACCES);
146 goto bail_unlock;
147 }
148
149 oi = OCFS2_I(inode);
150 /* Clear any orphaned state... If we were able to look up the
151 * inode from a directory, it certainly can't be orphaned. We
152 * might have the bad state from a node which intended to
153 * orphan this inode but crashed before it could commit the
154 * unlink. */
155 spin_lock(&oi->ip_lock);
156 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
157 spin_unlock(&oi->ip_lock);
158
159 bail_add:
160 ret = d_splice_alias(inode, dentry);
161
162 if (inode) {
163 /*
164 * If d_splice_alias() finds a DCACHE_DISCONNECTED
165 * dentry, it will d_move() it on top of ourse. The
166 * return value will indicate this however, so in
167 * those cases, we switch them around for the locking
168 * code.
169 *
170 * NOTE: This dentry already has ->d_op set from
171 * ocfs2_get_parent() and ocfs2_get_dentry()
172 */
173 if (!IS_ERR_OR_NULL(ret))
174 dentry = ret;
175
176 status = ocfs2_dentry_attach_lock(dentry, inode,
177 OCFS2_I(dir)->ip_blkno);
178 if (status) {
179 mlog_errno(status);
180 ret = ERR_PTR(status);
181 goto bail_unlock;
182 }
183 } else
184 ocfs2_dentry_attach_gen(dentry);
185
186 bail_unlock:
187 /* Don't drop the cluster lock until *after* the d_add --
188 * unlink on another node will message us to remove that
189 * dentry under this lock so otherwise we can race this with
190 * the downconvert thread and have a stale dentry. */
191 ocfs2_inode_unlock(dir, 0);
192
193 bail:
194
195 trace_ocfs2_lookup_ret(ret);
196
197 return ret;
198 }
199
200 static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode)
201 {
202 struct inode *inode;
203 int status;
204
205 inode = new_inode(dir->i_sb);
206 if (!inode) {
207 mlog(ML_ERROR, "new_inode failed!\n");
208 return ERR_PTR(-ENOMEM);
209 }
210
211 /* populate as many fields early on as possible - many of
212 * these are used by the support functions here and in
213 * callers. */
214 if (S_ISDIR(mode))
215 set_nlink(inode, 2);
216 inode_init_owner(inode, dir, mode);
217 status = dquot_initialize(inode);
218 if (status)
219 return ERR_PTR(status);
220
221 return inode;
222 }
223
224 static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb,
225 struct dentry *dentry, struct inode *inode)
226 {
227 struct ocfs2_dentry_lock *dl = dentry->d_fsdata;
228
229 ocfs2_simple_drop_lockres(osb, &dl->dl_lockres);
230 ocfs2_lock_res_free(&dl->dl_lockres);
231 BUG_ON(dl->dl_count != 1);
232 spin_lock(&dentry_attach_lock);
233 dentry->d_fsdata = NULL;
234 spin_unlock(&dentry_attach_lock);
235 kfree(dl);
236 iput(inode);
237 }
238
239 static int ocfs2_mknod(struct inode *dir,
240 struct dentry *dentry,
241 umode_t mode,
242 dev_t dev)
243 {
244 int status = 0;
245 struct buffer_head *parent_fe_bh = NULL;
246 handle_t *handle = NULL;
247 struct ocfs2_super *osb;
248 struct ocfs2_dinode *dirfe;
249 struct buffer_head *new_fe_bh = NULL;
250 struct inode *inode = NULL;
251 struct ocfs2_alloc_context *inode_ac = NULL;
252 struct ocfs2_alloc_context *data_ac = NULL;
253 struct ocfs2_alloc_context *meta_ac = NULL;
254 int want_clusters = 0;
255 int want_meta = 0;
256 int xattr_credits = 0;
257 struct ocfs2_security_xattr_info si = {
258 .enable = 1,
259 };
260 int did_quota_inode = 0;
261 struct ocfs2_dir_lookup_result lookup = { NULL, };
262 sigset_t oldset;
263 int did_block_signals = 0;
264 struct posix_acl *default_acl = NULL, *acl = NULL;
265 struct ocfs2_dentry_lock *dl = NULL;
266
267 trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
268 (unsigned long long)OCFS2_I(dir)->ip_blkno,
269 (unsigned long)dev, mode);
270
271 status = dquot_initialize(dir);
272 if (status) {
273 mlog_errno(status);
274 return status;
275 }
276
277 /* get our super block */
278 osb = OCFS2_SB(dir->i_sb);
279
280 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
281 if (status < 0) {
282 if (status != -ENOENT)
283 mlog_errno(status);
284 return status;
285 }
286
287 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
288 status = -EMLINK;
289 goto leave;
290 }
291
292 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
293 if (!ocfs2_read_links_count(dirfe)) {
294 /* can't make a file in a deleted directory. */
295 status = -ENOENT;
296 goto leave;
297 }
298
299 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
300 dentry->d_name.len);
301 if (status)
302 goto leave;
303
304 /* get a spot inside the dir. */
305 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
306 dentry->d_name.name,
307 dentry->d_name.len, &lookup);
308 if (status < 0) {
309 mlog_errno(status);
310 goto leave;
311 }
312
313 /* reserve an inode spot */
314 status = ocfs2_reserve_new_inode(osb, &inode_ac);
315 if (status < 0) {
316 if (status != -ENOSPC)
317 mlog_errno(status);
318 goto leave;
319 }
320
321 inode = ocfs2_get_init_inode(dir, mode);
322 if (IS_ERR(inode)) {
323 status = PTR_ERR(inode);
324 inode = NULL;
325 mlog_errno(status);
326 goto leave;
327 }
328
329 /* get security xattr */
330 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
331 if (status) {
332 if (status == -EOPNOTSUPP)
333 si.enable = 0;
334 else {
335 mlog_errno(status);
336 goto leave;
337 }
338 }
339
340 /* calculate meta data/clusters for setting security and acl xattr */
341 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
342 &si, &want_clusters,
343 &xattr_credits, &want_meta);
344 if (status < 0) {
345 mlog_errno(status);
346 goto leave;
347 }
348
349 /* Reserve a cluster if creating an extent based directory. */
350 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
351 want_clusters += 1;
352
353 /* Dir indexing requires extra space as well */
354 if (ocfs2_supports_indexed_dirs(osb))
355 want_meta++;
356 }
357
358 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
359 if (status < 0) {
360 if (status != -ENOSPC)
361 mlog_errno(status);
362 goto leave;
363 }
364
365 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
366 if (status < 0) {
367 if (status != -ENOSPC)
368 mlog_errno(status);
369 goto leave;
370 }
371
372 status = posix_acl_create(dir, &mode, &default_acl, &acl);
373 if (status) {
374 mlog_errno(status);
375 goto leave;
376 }
377
378 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
379 S_ISDIR(mode),
380 xattr_credits));
381 if (IS_ERR(handle)) {
382 status = PTR_ERR(handle);
383 handle = NULL;
384 mlog_errno(status);
385 goto leave;
386 }
387
388 /* Starting to change things, restart is no longer possible. */
389 ocfs2_block_signals(&oldset);
390 did_block_signals = 1;
391
392 status = dquot_alloc_inode(inode);
393 if (status)
394 goto leave;
395 did_quota_inode = 1;
396
397 /* do the real work now. */
398 status = ocfs2_mknod_locked(osb, dir, inode, dev,
399 &new_fe_bh, parent_fe_bh, handle,
400 inode_ac);
401 if (status < 0) {
402 mlog_errno(status);
403 goto leave;
404 }
405
406 if (S_ISDIR(mode)) {
407 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
408 new_fe_bh, data_ac, meta_ac);
409 if (status < 0) {
410 mlog_errno(status);
411 goto leave;
412 }
413
414 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
415 parent_fe_bh,
416 OCFS2_JOURNAL_ACCESS_WRITE);
417 if (status < 0) {
418 mlog_errno(status);
419 goto leave;
420 }
421 ocfs2_add_links_count(dirfe, 1);
422 ocfs2_journal_dirty(handle, parent_fe_bh);
423 inc_nlink(dir);
424 }
425
426 if (default_acl) {
427 status = ocfs2_set_acl(handle, inode, new_fe_bh,
428 ACL_TYPE_DEFAULT, default_acl,
429 meta_ac, data_ac);
430 }
431 if (!status && acl) {
432 status = ocfs2_set_acl(handle, inode, new_fe_bh,
433 ACL_TYPE_ACCESS, acl,
434 meta_ac, data_ac);
435 }
436
437 if (status < 0) {
438 mlog_errno(status);
439 goto leave;
440 }
441
442 if (si.enable) {
443 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
444 meta_ac, data_ac);
445 if (status < 0) {
446 mlog_errno(status);
447 goto leave;
448 }
449 }
450
451 /*
452 * Do this before adding the entry to the directory. We add
453 * also set d_op after success so that ->d_iput() will cleanup
454 * the dentry lock even if ocfs2_add_entry() fails below.
455 */
456 status = ocfs2_dentry_attach_lock(dentry, inode,
457 OCFS2_I(dir)->ip_blkno);
458 if (status) {
459 mlog_errno(status);
460 goto leave;
461 }
462
463 dl = dentry->d_fsdata;
464
465 status = ocfs2_add_entry(handle, dentry, inode,
466 OCFS2_I(inode)->ip_blkno, parent_fe_bh,
467 &lookup);
468 if (status < 0) {
469 mlog_errno(status);
470 goto leave;
471 }
472
473 insert_inode_hash(inode);
474 d_instantiate(dentry, inode);
475 status = 0;
476 leave:
477 if (default_acl)
478 posix_acl_release(default_acl);
479 if (acl)
480 posix_acl_release(acl);
481 if (status < 0 && did_quota_inode)
482 dquot_free_inode(inode);
483 if (handle)
484 ocfs2_commit_trans(osb, handle);
485
486 ocfs2_inode_unlock(dir, 1);
487 if (did_block_signals)
488 ocfs2_unblock_signals(&oldset);
489
490 brelse(new_fe_bh);
491 brelse(parent_fe_bh);
492 kfree(si.value);
493
494 ocfs2_free_dir_lookup_result(&lookup);
495
496 if (inode_ac)
497 ocfs2_free_alloc_context(inode_ac);
498
499 if (data_ac)
500 ocfs2_free_alloc_context(data_ac);
501
502 if (meta_ac)
503 ocfs2_free_alloc_context(meta_ac);
504
505 /*
506 * We should call iput after the i_mutex of the bitmap been
507 * unlocked in ocfs2_free_alloc_context, or the
508 * ocfs2_delete_inode will mutex_lock again.
509 */
510 if ((status < 0) && inode) {
511 if (dl)
512 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
513
514 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
515 clear_nlink(inode);
516 iput(inode);
517 }
518
519 if (status)
520 mlog_errno(status);
521
522 return status;
523 }
524
525 static int __ocfs2_mknod_locked(struct inode *dir,
526 struct inode *inode,
527 dev_t dev,
528 struct buffer_head **new_fe_bh,
529 struct buffer_head *parent_fe_bh,
530 handle_t *handle,
531 struct ocfs2_alloc_context *inode_ac,
532 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
533 {
534 int status = 0;
535 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
536 struct ocfs2_dinode *fe = NULL;
537 struct ocfs2_extent_list *fel;
538 u16 feat;
539 struct ocfs2_inode_info *oi = OCFS2_I(inode);
540
541 *new_fe_bh = NULL;
542
543 /* populate as many fields early on as possible - many of
544 * these are used by the support functions here and in
545 * callers. */
546 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
547 OCFS2_I(inode)->ip_blkno = fe_blkno;
548 spin_lock(&osb->osb_lock);
549 inode->i_generation = osb->s_next_generation++;
550 spin_unlock(&osb->osb_lock);
551
552 *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
553 if (!*new_fe_bh) {
554 status = -ENOMEM;
555 mlog_errno(status);
556 goto leave;
557 }
558 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
559
560 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
561 *new_fe_bh,
562 OCFS2_JOURNAL_ACCESS_CREATE);
563 if (status < 0) {
564 mlog_errno(status);
565 goto leave;
566 }
567
568 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
569 memset(fe, 0, osb->sb->s_blocksize);
570
571 fe->i_generation = cpu_to_le32(inode->i_generation);
572 fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
573 fe->i_blkno = cpu_to_le64(fe_blkno);
574 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
575 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
576 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
577 fe->i_uid = cpu_to_le32(i_uid_read(inode));
578 fe->i_gid = cpu_to_le32(i_gid_read(inode));
579 fe->i_mode = cpu_to_le16(inode->i_mode);
580 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
581 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
582
583 ocfs2_set_links_count(fe, inode->i_nlink);
584
585 fe->i_last_eb_blk = 0;
586 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
587 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
588 fe->i_atime = fe->i_ctime = fe->i_mtime =
589 cpu_to_le64(CURRENT_TIME.tv_sec);
590 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
591 cpu_to_le32(CURRENT_TIME.tv_nsec);
592 fe->i_dtime = 0;
593
594 /*
595 * If supported, directories start with inline data. If inline
596 * isn't supported, but indexing is, we start them as indexed.
597 */
598 feat = le16_to_cpu(fe->i_dyn_features);
599 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
600 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
601
602 fe->id2.i_data.id_count = cpu_to_le16(
603 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
604 } else {
605 fel = &fe->id2.i_list;
606 fel->l_tree_depth = 0;
607 fel->l_next_free_rec = 0;
608 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
609 }
610
611 ocfs2_journal_dirty(handle, *new_fe_bh);
612
613 ocfs2_populate_inode(inode, fe, 1);
614 ocfs2_ci_set_new(osb, INODE_CACHE(inode));
615 if (!ocfs2_mount_local(osb)) {
616 status = ocfs2_create_new_inode_locks(inode);
617 if (status < 0)
618 mlog_errno(status);
619 }
620
621 oi->i_sync_tid = handle->h_transaction->t_tid;
622 oi->i_datasync_tid = handle->h_transaction->t_tid;
623
624 leave:
625 if (status < 0) {
626 if (*new_fe_bh) {
627 brelse(*new_fe_bh);
628 *new_fe_bh = NULL;
629 }
630 }
631
632 if (status)
633 mlog_errno(status);
634 return status;
635 }
636
637 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
638 struct inode *dir,
639 struct inode *inode,
640 dev_t dev,
641 struct buffer_head **new_fe_bh,
642 struct buffer_head *parent_fe_bh,
643 handle_t *handle,
644 struct ocfs2_alloc_context *inode_ac)
645 {
646 int status = 0;
647 u64 suballoc_loc, fe_blkno = 0;
648 u16 suballoc_bit;
649
650 *new_fe_bh = NULL;
651
652 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
653 inode_ac, &suballoc_loc,
654 &suballoc_bit, &fe_blkno);
655 if (status < 0) {
656 mlog_errno(status);
657 return status;
658 }
659
660 return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
661 parent_fe_bh, handle, inode_ac,
662 fe_blkno, suballoc_loc, suballoc_bit);
663 }
664
665 static int ocfs2_mkdir(struct inode *dir,
666 struct dentry *dentry,
667 umode_t mode)
668 {
669 int ret;
670
671 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
672 OCFS2_I(dir)->ip_blkno, mode);
673 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
674 if (ret)
675 mlog_errno(ret);
676
677 return ret;
678 }
679
680 static int ocfs2_create(struct inode *dir,
681 struct dentry *dentry,
682 umode_t mode,
683 bool excl)
684 {
685 int ret;
686
687 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
688 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
689 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
690 if (ret)
691 mlog_errno(ret);
692
693 return ret;
694 }
695
696 static int ocfs2_link(struct dentry *old_dentry,
697 struct inode *dir,
698 struct dentry *dentry)
699 {
700 handle_t *handle;
701 struct inode *inode = d_inode(old_dentry);
702 struct inode *old_dir = d_inode(old_dentry->d_parent);
703 int err;
704 struct buffer_head *fe_bh = NULL;
705 struct buffer_head *old_dir_bh = NULL;
706 struct buffer_head *parent_fe_bh = NULL;
707 struct ocfs2_dinode *fe = NULL;
708 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
709 struct ocfs2_dir_lookup_result lookup = { NULL, };
710 sigset_t oldset;
711 u64 old_de_ino;
712
713 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
714 old_dentry->d_name.len, old_dentry->d_name.name,
715 dentry->d_name.len, dentry->d_name.name);
716
717 if (S_ISDIR(inode->i_mode))
718 return -EPERM;
719
720 err = dquot_initialize(dir);
721 if (err) {
722 mlog_errno(err);
723 return err;
724 }
725
726 err = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
727 &parent_fe_bh, dir, 0);
728 if (err < 0) {
729 if (err != -ENOENT)
730 mlog_errno(err);
731 return err;
732 }
733
734 /* make sure both dirs have bhs
735 * get an extra ref on old_dir_bh if old==new */
736 if (!parent_fe_bh) {
737 if (old_dir_bh) {
738 parent_fe_bh = old_dir_bh;
739 get_bh(parent_fe_bh);
740 } else {
741 mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str);
742 err = -EIO;
743 goto out;
744 }
745 }
746
747 if (!dir->i_nlink) {
748 err = -ENOENT;
749 goto out;
750 }
751
752 err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
753 old_dentry->d_name.len, &old_de_ino);
754 if (err) {
755 err = -ENOENT;
756 goto out;
757 }
758
759 /*
760 * Check whether another node removed the source inode while we
761 * were in the vfs.
762 */
763 if (old_de_ino != OCFS2_I(inode)->ip_blkno) {
764 err = -ENOENT;
765 goto out;
766 }
767
768 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
769 dentry->d_name.len);
770 if (err)
771 goto out;
772
773 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
774 dentry->d_name.name,
775 dentry->d_name.len, &lookup);
776 if (err < 0) {
777 mlog_errno(err);
778 goto out;
779 }
780
781 err = ocfs2_inode_lock(inode, &fe_bh, 1);
782 if (err < 0) {
783 if (err != -ENOENT)
784 mlog_errno(err);
785 goto out;
786 }
787
788 fe = (struct ocfs2_dinode *) fe_bh->b_data;
789 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
790 err = -EMLINK;
791 goto out_unlock_inode;
792 }
793
794 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
795 if (IS_ERR(handle)) {
796 err = PTR_ERR(handle);
797 handle = NULL;
798 mlog_errno(err);
799 goto out_unlock_inode;
800 }
801
802 /* Starting to change things, restart is no longer possible. */
803 ocfs2_block_signals(&oldset);
804
805 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
806 OCFS2_JOURNAL_ACCESS_WRITE);
807 if (err < 0) {
808 mlog_errno(err);
809 goto out_commit;
810 }
811
812 inc_nlink(inode);
813 inode->i_ctime = CURRENT_TIME;
814 ocfs2_set_links_count(fe, inode->i_nlink);
815 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
816 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
817 ocfs2_journal_dirty(handle, fe_bh);
818
819 err = ocfs2_add_entry(handle, dentry, inode,
820 OCFS2_I(inode)->ip_blkno,
821 parent_fe_bh, &lookup);
822 if (err) {
823 ocfs2_add_links_count(fe, -1);
824 drop_nlink(inode);
825 mlog_errno(err);
826 goto out_commit;
827 }
828
829 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
830 if (err) {
831 mlog_errno(err);
832 goto out_commit;
833 }
834
835 ihold(inode);
836 d_instantiate(dentry, inode);
837
838 out_commit:
839 ocfs2_commit_trans(osb, handle);
840 ocfs2_unblock_signals(&oldset);
841 out_unlock_inode:
842 ocfs2_inode_unlock(inode, 1);
843
844 out:
845 ocfs2_double_unlock(old_dir, dir);
846
847 brelse(fe_bh);
848 brelse(parent_fe_bh);
849 brelse(old_dir_bh);
850
851 ocfs2_free_dir_lookup_result(&lookup);
852
853 if (err)
854 mlog_errno(err);
855
856 return err;
857 }
858
859 /*
860 * Takes and drops an exclusive lock on the given dentry. This will
861 * force other nodes to drop it.
862 */
863 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
864 {
865 int ret;
866
867 ret = ocfs2_dentry_lock(dentry, 1);
868 if (ret)
869 mlog_errno(ret);
870 else
871 ocfs2_dentry_unlock(dentry, 1);
872
873 return ret;
874 }
875
876 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
877 {
878 if (S_ISDIR(inode->i_mode)) {
879 if (inode->i_nlink == 2)
880 return 1;
881 return 0;
882 }
883
884 if (inode->i_nlink == 1)
885 return 1;
886 return 0;
887 }
888
889 static int ocfs2_unlink(struct inode *dir,
890 struct dentry *dentry)
891 {
892 int status;
893 int child_locked = 0;
894 bool is_unlinkable = false;
895 struct inode *inode = d_inode(dentry);
896 struct inode *orphan_dir = NULL;
897 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
898 u64 blkno;
899 struct ocfs2_dinode *fe = NULL;
900 struct buffer_head *fe_bh = NULL;
901 struct buffer_head *parent_node_bh = NULL;
902 handle_t *handle = NULL;
903 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
904 struct ocfs2_dir_lookup_result lookup = { NULL, };
905 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
906
907 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
908 dentry->d_name.name,
909 (unsigned long long)OCFS2_I(dir)->ip_blkno,
910 (unsigned long long)OCFS2_I(inode)->ip_blkno);
911
912 status = dquot_initialize(dir);
913 if (status) {
914 mlog_errno(status);
915 return status;
916 }
917
918 BUG_ON(d_inode(dentry->d_parent) != dir);
919
920 if (inode == osb->root_inode)
921 return -EPERM;
922
923 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
924 OI_LS_PARENT);
925 if (status < 0) {
926 if (status != -ENOENT)
927 mlog_errno(status);
928 return status;
929 }
930
931 status = ocfs2_find_files_on_disk(dentry->d_name.name,
932 dentry->d_name.len, &blkno, dir,
933 &lookup);
934 if (status < 0) {
935 if (status != -ENOENT)
936 mlog_errno(status);
937 goto leave;
938 }
939
940 if (OCFS2_I(inode)->ip_blkno != blkno) {
941 status = -ENOENT;
942
943 trace_ocfs2_unlink_noent(
944 (unsigned long long)OCFS2_I(inode)->ip_blkno,
945 (unsigned long long)blkno,
946 OCFS2_I(inode)->ip_flags);
947 goto leave;
948 }
949
950 status = ocfs2_inode_lock(inode, &fe_bh, 1);
951 if (status < 0) {
952 if (status != -ENOENT)
953 mlog_errno(status);
954 goto leave;
955 }
956 child_locked = 1;
957
958 if (S_ISDIR(inode->i_mode)) {
959 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
960 status = -ENOTEMPTY;
961 goto leave;
962 }
963 }
964
965 status = ocfs2_remote_dentry_delete(dentry);
966 if (status < 0) {
967 /* This remote delete should succeed under all normal
968 * circumstances. */
969 mlog_errno(status);
970 goto leave;
971 }
972
973 if (ocfs2_inode_is_unlinkable(inode)) {
974 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
975 OCFS2_I(inode)->ip_blkno,
976 orphan_name, &orphan_insert,
977 false);
978 if (status < 0) {
979 mlog_errno(status);
980 goto leave;
981 }
982 is_unlinkable = true;
983 }
984
985 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
986 if (IS_ERR(handle)) {
987 status = PTR_ERR(handle);
988 handle = NULL;
989 mlog_errno(status);
990 goto leave;
991 }
992
993 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
994 OCFS2_JOURNAL_ACCESS_WRITE);
995 if (status < 0) {
996 mlog_errno(status);
997 goto leave;
998 }
999
1000 fe = (struct ocfs2_dinode *) fe_bh->b_data;
1001
1002 /* delete the name from the parent dir */
1003 status = ocfs2_delete_entry(handle, dir, &lookup);
1004 if (status < 0) {
1005 mlog_errno(status);
1006 goto leave;
1007 }
1008
1009 if (S_ISDIR(inode->i_mode))
1010 drop_nlink(inode);
1011 drop_nlink(inode);
1012 ocfs2_set_links_count(fe, inode->i_nlink);
1013 ocfs2_journal_dirty(handle, fe_bh);
1014
1015 dir->i_ctime = dir->i_mtime = CURRENT_TIME;
1016 if (S_ISDIR(inode->i_mode))
1017 drop_nlink(dir);
1018
1019 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
1020 if (status < 0) {
1021 mlog_errno(status);
1022 if (S_ISDIR(inode->i_mode))
1023 inc_nlink(dir);
1024 goto leave;
1025 }
1026
1027 if (is_unlinkable) {
1028 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
1029 orphan_name, &orphan_insert, orphan_dir, false);
1030 if (status < 0)
1031 mlog_errno(status);
1032 }
1033
1034 leave:
1035 if (handle)
1036 ocfs2_commit_trans(osb, handle);
1037
1038 if (orphan_dir) {
1039 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1040 ocfs2_inode_unlock(orphan_dir, 1);
1041 mutex_unlock(&orphan_dir->i_mutex);
1042 iput(orphan_dir);
1043 }
1044
1045 if (child_locked)
1046 ocfs2_inode_unlock(inode, 1);
1047
1048 ocfs2_inode_unlock(dir, 1);
1049
1050 brelse(fe_bh);
1051 brelse(parent_node_bh);
1052
1053 ocfs2_free_dir_lookup_result(&orphan_insert);
1054 ocfs2_free_dir_lookup_result(&lookup);
1055
1056 if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
1057 mlog_errno(status);
1058
1059 return status;
1060 }
1061
1062 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb,
1063 u64 src_inode_no, u64 dest_inode_no)
1064 {
1065 int ret = 0, i = 0;
1066 u64 parent_inode_no = 0;
1067 u64 child_inode_no = src_inode_no;
1068 struct inode *child_inode;
1069
1070 #define MAX_LOOKUP_TIMES 32
1071 while (1) {
1072 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0);
1073 if (IS_ERR(child_inode)) {
1074 ret = PTR_ERR(child_inode);
1075 break;
1076 }
1077
1078 ret = ocfs2_inode_lock(child_inode, NULL, 0);
1079 if (ret < 0) {
1080 iput(child_inode);
1081 if (ret != -ENOENT)
1082 mlog_errno(ret);
1083 break;
1084 }
1085
1086 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2,
1087 &parent_inode_no);
1088 ocfs2_inode_unlock(child_inode, 0);
1089 iput(child_inode);
1090 if (ret < 0) {
1091 ret = -ENOENT;
1092 break;
1093 }
1094
1095 if (parent_inode_no == dest_inode_no) {
1096 ret = 1;
1097 break;
1098 }
1099
1100 if (parent_inode_no == osb->root_inode->i_ino) {
1101 ret = 0;
1102 break;
1103 }
1104
1105 child_inode_no = parent_inode_no;
1106
1107 if (++i >= MAX_LOOKUP_TIMES) {
1108 mlog(ML_NOTICE, "max lookup times reached, filesystem "
1109 "may have nested directories, "
1110 "src inode: %llu, dest inode: %llu.\n",
1111 (unsigned long long)src_inode_no,
1112 (unsigned long long)dest_inode_no);
1113 ret = 0;
1114 break;
1115 }
1116 }
1117
1118 return ret;
1119 }
1120
1121 /*
1122 * The only place this should be used is rename and link!
1123 * if they have the same id, then the 1st one is the only one locked.
1124 */
1125 static int ocfs2_double_lock(struct ocfs2_super *osb,
1126 struct buffer_head **bh1,
1127 struct inode *inode1,
1128 struct buffer_head **bh2,
1129 struct inode *inode2,
1130 int rename)
1131 {
1132 int status;
1133 int inode1_is_ancestor, inode2_is_ancestor;
1134 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
1135 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
1136
1137 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
1138 (unsigned long long)oi2->ip_blkno);
1139
1140 if (*bh1)
1141 *bh1 = NULL;
1142 if (*bh2)
1143 *bh2 = NULL;
1144
1145 /* we always want to lock the one with the lower lockid first.
1146 * and if they are nested, we lock ancestor first */
1147 if (oi1->ip_blkno != oi2->ip_blkno) {
1148 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno,
1149 oi1->ip_blkno);
1150 if (inode1_is_ancestor < 0) {
1151 status = inode1_is_ancestor;
1152 goto bail;
1153 }
1154
1155 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno,
1156 oi2->ip_blkno);
1157 if (inode2_is_ancestor < 0) {
1158 status = inode2_is_ancestor;
1159 goto bail;
1160 }
1161
1162 if ((inode1_is_ancestor == 1) ||
1163 (oi1->ip_blkno < oi2->ip_blkno &&
1164 inode2_is_ancestor == 0)) {
1165 /* switch id1 and id2 around */
1166 swap(bh2, bh1);
1167 swap(inode2, inode1);
1168 }
1169 /* lock id2 */
1170 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1171 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT);
1172 if (status < 0) {
1173 if (status != -ENOENT)
1174 mlog_errno(status);
1175 goto bail;
1176 }
1177 }
1178
1179 /* lock id1 */
1180 status = ocfs2_inode_lock_nested(inode1, bh1, 1,
1181 rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT);
1182 if (status < 0) {
1183 /*
1184 * An error return must mean that no cluster locks
1185 * were held on function exit.
1186 */
1187 if (oi1->ip_blkno != oi2->ip_blkno) {
1188 ocfs2_inode_unlock(inode2, 1);
1189 brelse(*bh2);
1190 *bh2 = NULL;
1191 }
1192
1193 if (status != -ENOENT)
1194 mlog_errno(status);
1195 }
1196
1197 trace_ocfs2_double_lock_end(
1198 (unsigned long long)OCFS2_I(inode1)->ip_blkno,
1199 (unsigned long long)OCFS2_I(inode2)->ip_blkno);
1200
1201 bail:
1202 if (status)
1203 mlog_errno(status);
1204 return status;
1205 }
1206
1207 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1208 {
1209 ocfs2_inode_unlock(inode1, 1);
1210
1211 if (inode1 != inode2)
1212 ocfs2_inode_unlock(inode2, 1);
1213 }
1214
1215 static int ocfs2_rename(struct inode *old_dir,
1216 struct dentry *old_dentry,
1217 struct inode *new_dir,
1218 struct dentry *new_dentry)
1219 {
1220 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1221 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1222 struct inode *old_inode = d_inode(old_dentry);
1223 struct inode *new_inode = d_inode(new_dentry);
1224 struct inode *orphan_dir = NULL;
1225 struct ocfs2_dinode *newfe = NULL;
1226 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1227 struct buffer_head *newfe_bh = NULL;
1228 struct buffer_head *old_inode_bh = NULL;
1229 struct ocfs2_super *osb = NULL;
1230 u64 newfe_blkno, old_de_ino;
1231 handle_t *handle = NULL;
1232 struct buffer_head *old_dir_bh = NULL;
1233 struct buffer_head *new_dir_bh = NULL;
1234 u32 old_dir_nlink = old_dir->i_nlink;
1235 struct ocfs2_dinode *old_di;
1236 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1237 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1238 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1239 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1240 struct ocfs2_dir_lookup_result target_insert = { NULL, };
1241 bool should_add_orphan = false;
1242
1243 /* At some point it might be nice to break this function up a
1244 * bit. */
1245
1246 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1247 old_dentry->d_name.len, old_dentry->d_name.name,
1248 new_dentry->d_name.len, new_dentry->d_name.name);
1249
1250 status = dquot_initialize(old_dir);
1251 if (status) {
1252 mlog_errno(status);
1253 goto bail;
1254 }
1255 status = dquot_initialize(new_dir);
1256 if (status) {
1257 mlog_errno(status);
1258 goto bail;
1259 }
1260
1261 osb = OCFS2_SB(old_dir->i_sb);
1262
1263 if (new_inode) {
1264 if (!igrab(new_inode))
1265 BUG();
1266 }
1267
1268 /* Assume a directory hierarchy thusly:
1269 * a/b/c
1270 * a/d
1271 * a,b,c, and d are all directories.
1272 *
1273 * from cwd of 'a' on both nodes:
1274 * node1: mv b/c d
1275 * node2: mv d b/c
1276 *
1277 * And that's why, just like the VFS, we need a file system
1278 * rename lock. */
1279 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1280 status = ocfs2_rename_lock(osb);
1281 if (status < 0) {
1282 mlog_errno(status);
1283 goto bail;
1284 }
1285 rename_lock = 1;
1286
1287 /* here we cannot guarantee the inodes haven't just been
1288 * changed, so check if they are nested again */
1289 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino,
1290 old_inode->i_ino);
1291 if (status < 0) {
1292 mlog_errno(status);
1293 goto bail;
1294 } else if (status == 1) {
1295 status = -EPERM;
1296 trace_ocfs2_rename_not_permitted(
1297 (unsigned long long)old_inode->i_ino,
1298 (unsigned long long)new_dir->i_ino);
1299 goto bail;
1300 }
1301 }
1302
1303 /* if old and new are the same, this'll just do one lock. */
1304 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1305 &new_dir_bh, new_dir, 1);
1306 if (status < 0) {
1307 mlog_errno(status);
1308 goto bail;
1309 }
1310 parents_locked = 1;
1311
1312 if (!new_dir->i_nlink) {
1313 status = -EACCES;
1314 goto bail;
1315 }
1316
1317 /* make sure both dirs have bhs
1318 * get an extra ref on old_dir_bh if old==new */
1319 if (!new_dir_bh) {
1320 if (old_dir_bh) {
1321 new_dir_bh = old_dir_bh;
1322 get_bh(new_dir_bh);
1323 } else {
1324 mlog(ML_ERROR, "no old_dir_bh!\n");
1325 status = -EIO;
1326 goto bail;
1327 }
1328 }
1329
1330 /*
1331 * Aside from allowing a meta data update, the locking here
1332 * also ensures that the downconvert thread on other nodes
1333 * won't have to concurrently downconvert the inode and the
1334 * dentry locks.
1335 */
1336 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1337 OI_LS_PARENT);
1338 if (status < 0) {
1339 if (status != -ENOENT)
1340 mlog_errno(status);
1341 goto bail;
1342 }
1343 old_child_locked = 1;
1344
1345 status = ocfs2_remote_dentry_delete(old_dentry);
1346 if (status < 0) {
1347 mlog_errno(status);
1348 goto bail;
1349 }
1350
1351 if (S_ISDIR(old_inode->i_mode)) {
1352 u64 old_inode_parent;
1353
1354 update_dot_dot = 1;
1355 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1356 old_inode,
1357 &old_inode_dot_dot_res);
1358 if (status) {
1359 status = -EIO;
1360 goto bail;
1361 }
1362
1363 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1364 status = -EIO;
1365 goto bail;
1366 }
1367
1368 if (!new_inode && new_dir != old_dir &&
1369 new_dir->i_nlink >= ocfs2_link_max(osb)) {
1370 status = -EMLINK;
1371 goto bail;
1372 }
1373 }
1374
1375 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1376 old_dentry->d_name.len,
1377 &old_de_ino);
1378 if (status) {
1379 status = -ENOENT;
1380 goto bail;
1381 }
1382
1383 /*
1384 * Check for inode number is _not_ due to possible IO errors.
1385 * We might rmdir the source, keep it as pwd of some process
1386 * and merrily kill the link to whatever was created under the
1387 * same name. Goodbye sticky bit ;-<
1388 */
1389 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1390 status = -ENOENT;
1391 goto bail;
1392 }
1393
1394 /* check if the target already exists (in which case we need
1395 * to delete it */
1396 status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1397 new_dentry->d_name.len,
1398 &newfe_blkno, new_dir,
1399 &target_lookup_res);
1400 /* The only error we allow here is -ENOENT because the new
1401 * file not existing is perfectly valid. */
1402 if ((status < 0) && (status != -ENOENT)) {
1403 /* If we cannot find the file specified we should just */
1404 /* return the error... */
1405 mlog_errno(status);
1406 goto bail;
1407 }
1408 if (status == 0)
1409 target_exists = 1;
1410
1411 if (!target_exists && new_inode) {
1412 /*
1413 * Target was unlinked by another node while we were
1414 * waiting to get to ocfs2_rename(). There isn't
1415 * anything we can do here to help the situation, so
1416 * bubble up the appropriate error.
1417 */
1418 status = -ENOENT;
1419 goto bail;
1420 }
1421
1422 /* In case we need to overwrite an existing file, we blow it
1423 * away first */
1424 if (target_exists) {
1425 /* VFS didn't think there existed an inode here, but
1426 * someone else in the cluster must have raced our
1427 * rename to create one. Today we error cleanly, in
1428 * the future we should consider calling iget to build
1429 * a new struct inode for this entry. */
1430 if (!new_inode) {
1431 status = -EACCES;
1432
1433 trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1434 new_dentry->d_name.name);
1435 goto bail;
1436 }
1437
1438 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1439 status = -EACCES;
1440
1441 trace_ocfs2_rename_disagree(
1442 (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1443 (unsigned long long)newfe_blkno,
1444 OCFS2_I(new_inode)->ip_flags);
1445 goto bail;
1446 }
1447
1448 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1449 if (status < 0) {
1450 if (status != -ENOENT)
1451 mlog_errno(status);
1452 goto bail;
1453 }
1454 new_child_locked = 1;
1455
1456 status = ocfs2_remote_dentry_delete(new_dentry);
1457 if (status < 0) {
1458 mlog_errno(status);
1459 goto bail;
1460 }
1461
1462 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1463
1464 trace_ocfs2_rename_over_existing(
1465 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1466 (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1467
1468 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1469 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1470 OCFS2_I(new_inode)->ip_blkno,
1471 orphan_name, &orphan_insert,
1472 false);
1473 if (status < 0) {
1474 mlog_errno(status);
1475 goto bail;
1476 }
1477 should_add_orphan = true;
1478 }
1479 } else {
1480 BUG_ON(d_inode(new_dentry->d_parent) != new_dir);
1481
1482 status = ocfs2_check_dir_for_entry(new_dir,
1483 new_dentry->d_name.name,
1484 new_dentry->d_name.len);
1485 if (status)
1486 goto bail;
1487
1488 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1489 new_dentry->d_name.name,
1490 new_dentry->d_name.len,
1491 &target_insert);
1492 if (status < 0) {
1493 mlog_errno(status);
1494 goto bail;
1495 }
1496 }
1497
1498 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1499 if (IS_ERR(handle)) {
1500 status = PTR_ERR(handle);
1501 handle = NULL;
1502 mlog_errno(status);
1503 goto bail;
1504 }
1505
1506 if (target_exists) {
1507 if (S_ISDIR(new_inode->i_mode)) {
1508 if (new_inode->i_nlink != 2 ||
1509 !ocfs2_empty_dir(new_inode)) {
1510 status = -ENOTEMPTY;
1511 goto bail;
1512 }
1513 }
1514 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1515 newfe_bh,
1516 OCFS2_JOURNAL_ACCESS_WRITE);
1517 if (status < 0) {
1518 mlog_errno(status);
1519 goto bail;
1520 }
1521
1522 /* change the dirent to point to the correct inode */
1523 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1524 old_inode);
1525 if (status < 0) {
1526 mlog_errno(status);
1527 goto bail;
1528 }
1529 new_dir->i_version++;
1530
1531 if (S_ISDIR(new_inode->i_mode))
1532 ocfs2_set_links_count(newfe, 0);
1533 else
1534 ocfs2_add_links_count(newfe, -1);
1535 ocfs2_journal_dirty(handle, newfe_bh);
1536 if (should_add_orphan) {
1537 status = ocfs2_orphan_add(osb, handle, new_inode,
1538 newfe_bh, orphan_name,
1539 &orphan_insert, orphan_dir, false);
1540 if (status < 0) {
1541 mlog_errno(status);
1542 goto bail;
1543 }
1544 }
1545 } else {
1546 /* if the name was not found in new_dir, add it now */
1547 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1548 OCFS2_I(old_inode)->ip_blkno,
1549 new_dir_bh, &target_insert);
1550 }
1551
1552 old_inode->i_ctime = CURRENT_TIME;
1553 mark_inode_dirty(old_inode);
1554
1555 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1556 old_inode_bh,
1557 OCFS2_JOURNAL_ACCESS_WRITE);
1558 if (status >= 0) {
1559 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1560
1561 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1562 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1563 ocfs2_journal_dirty(handle, old_inode_bh);
1564 } else
1565 mlog_errno(status);
1566
1567 /*
1568 * Now that the name has been added to new_dir, remove the old name.
1569 *
1570 * We don't keep any directory entry context around until now
1571 * because the insert might have changed the type of directory
1572 * we're dealing with.
1573 */
1574 status = ocfs2_find_entry(old_dentry->d_name.name,
1575 old_dentry->d_name.len, old_dir,
1576 &old_entry_lookup);
1577 if (status) {
1578 if (!is_journal_aborted(osb->journal->j_journal)) {
1579 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1580 "is not deleted.",
1581 new_dentry->d_name.len, new_dentry->d_name.name,
1582 old_dentry->d_name.len, old_dentry->d_name.name);
1583 }
1584 goto bail;
1585 }
1586
1587 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1588 if (status < 0) {
1589 mlog_errno(status);
1590 if (!is_journal_aborted(osb->journal->j_journal)) {
1591 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1592 "is not deleted.",
1593 new_dentry->d_name.len, new_dentry->d_name.name,
1594 old_dentry->d_name.len, old_dentry->d_name.name);
1595 }
1596 goto bail;
1597 }
1598
1599 if (new_inode) {
1600 drop_nlink(new_inode);
1601 new_inode->i_ctime = CURRENT_TIME;
1602 }
1603 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1604
1605 if (update_dot_dot) {
1606 status = ocfs2_update_entry(old_inode, handle,
1607 &old_inode_dot_dot_res, new_dir);
1608 drop_nlink(old_dir);
1609 if (new_inode) {
1610 drop_nlink(new_inode);
1611 } else {
1612 inc_nlink(new_dir);
1613 mark_inode_dirty(new_dir);
1614 }
1615 }
1616 mark_inode_dirty(old_dir);
1617 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1618 if (new_inode) {
1619 mark_inode_dirty(new_inode);
1620 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1621 }
1622
1623 if (old_dir != new_dir) {
1624 /* Keep the same times on both directories.*/
1625 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1626
1627 /*
1628 * This will also pick up the i_nlink change from the
1629 * block above.
1630 */
1631 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1632 }
1633
1634 if (old_dir_nlink != old_dir->i_nlink) {
1635 if (!old_dir_bh) {
1636 mlog(ML_ERROR, "need to change nlink for old dir "
1637 "%llu from %d to %d but bh is NULL!\n",
1638 (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1639 (int)old_dir_nlink, old_dir->i_nlink);
1640 } else {
1641 struct ocfs2_dinode *fe;
1642 status = ocfs2_journal_access_di(handle,
1643 INODE_CACHE(old_dir),
1644 old_dir_bh,
1645 OCFS2_JOURNAL_ACCESS_WRITE);
1646 fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1647 ocfs2_set_links_count(fe, old_dir->i_nlink);
1648 ocfs2_journal_dirty(handle, old_dir_bh);
1649 }
1650 }
1651 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1652 status = 0;
1653 bail:
1654 if (handle)
1655 ocfs2_commit_trans(osb, handle);
1656
1657 if (orphan_dir) {
1658 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1659 ocfs2_inode_unlock(orphan_dir, 1);
1660 mutex_unlock(&orphan_dir->i_mutex);
1661 iput(orphan_dir);
1662 }
1663
1664 if (new_child_locked)
1665 ocfs2_inode_unlock(new_inode, 1);
1666
1667 if (old_child_locked)
1668 ocfs2_inode_unlock(old_inode, 1);
1669
1670 if (parents_locked)
1671 ocfs2_double_unlock(old_dir, new_dir);
1672
1673 if (rename_lock)
1674 ocfs2_rename_unlock(osb);
1675
1676 if (new_inode)
1677 sync_mapping_buffers(old_inode->i_mapping);
1678
1679 if (new_inode)
1680 iput(new_inode);
1681
1682 ocfs2_free_dir_lookup_result(&target_lookup_res);
1683 ocfs2_free_dir_lookup_result(&old_entry_lookup);
1684 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1685 ocfs2_free_dir_lookup_result(&orphan_insert);
1686 ocfs2_free_dir_lookup_result(&target_insert);
1687
1688 brelse(newfe_bh);
1689 brelse(old_inode_bh);
1690 brelse(old_dir_bh);
1691 brelse(new_dir_bh);
1692
1693 if (status)
1694 mlog_errno(status);
1695
1696 return status;
1697 }
1698
1699 /*
1700 * we expect i_size = strlen(symname). Copy symname into the file
1701 * data, including the null terminator.
1702 */
1703 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1704 handle_t *handle,
1705 struct inode *inode,
1706 const char *symname)
1707 {
1708 struct buffer_head **bhs = NULL;
1709 const char *c;
1710 struct super_block *sb = osb->sb;
1711 u64 p_blkno, p_blocks;
1712 int virtual, blocks, status, i, bytes_left;
1713
1714 bytes_left = i_size_read(inode) + 1;
1715 /* we can't trust i_blocks because we're actually going to
1716 * write i_size + 1 bytes. */
1717 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1718
1719 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1720 i_size_read(inode), blocks);
1721
1722 /* Sanity check -- make sure we're going to fit. */
1723 if (bytes_left >
1724 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1725 status = -EIO;
1726 mlog_errno(status);
1727 goto bail;
1728 }
1729
1730 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1731 if (!bhs) {
1732 status = -ENOMEM;
1733 mlog_errno(status);
1734 goto bail;
1735 }
1736
1737 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1738 NULL);
1739 if (status < 0) {
1740 mlog_errno(status);
1741 goto bail;
1742 }
1743
1744 /* links can never be larger than one cluster so we know this
1745 * is all going to be contiguous, but do a sanity check
1746 * anyway. */
1747 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1748 status = -EIO;
1749 mlog_errno(status);
1750 goto bail;
1751 }
1752
1753 virtual = 0;
1754 while(bytes_left > 0) {
1755 c = &symname[virtual * sb->s_blocksize];
1756
1757 bhs[virtual] = sb_getblk(sb, p_blkno);
1758 if (!bhs[virtual]) {
1759 status = -ENOMEM;
1760 mlog_errno(status);
1761 goto bail;
1762 }
1763 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1764 bhs[virtual]);
1765
1766 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1767 bhs[virtual],
1768 OCFS2_JOURNAL_ACCESS_CREATE);
1769 if (status < 0) {
1770 mlog_errno(status);
1771 goto bail;
1772 }
1773
1774 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1775
1776 memcpy(bhs[virtual]->b_data, c,
1777 (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1778 bytes_left);
1779
1780 ocfs2_journal_dirty(handle, bhs[virtual]);
1781
1782 virtual++;
1783 p_blkno++;
1784 bytes_left -= sb->s_blocksize;
1785 }
1786
1787 status = 0;
1788 bail:
1789
1790 if (bhs) {
1791 for(i = 0; i < blocks; i++)
1792 brelse(bhs[i]);
1793 kfree(bhs);
1794 }
1795
1796 if (status)
1797 mlog_errno(status);
1798 return status;
1799 }
1800
1801 static int ocfs2_symlink(struct inode *dir,
1802 struct dentry *dentry,
1803 const char *symname)
1804 {
1805 int status, l, credits;
1806 u64 newsize;
1807 struct ocfs2_super *osb = NULL;
1808 struct inode *inode = NULL;
1809 struct super_block *sb;
1810 struct buffer_head *new_fe_bh = NULL;
1811 struct buffer_head *parent_fe_bh = NULL;
1812 struct ocfs2_dinode *fe = NULL;
1813 struct ocfs2_dinode *dirfe;
1814 handle_t *handle = NULL;
1815 struct ocfs2_alloc_context *inode_ac = NULL;
1816 struct ocfs2_alloc_context *data_ac = NULL;
1817 struct ocfs2_alloc_context *xattr_ac = NULL;
1818 int want_clusters = 0;
1819 int xattr_credits = 0;
1820 struct ocfs2_security_xattr_info si = {
1821 .enable = 1,
1822 };
1823 int did_quota = 0, did_quota_inode = 0;
1824 struct ocfs2_dir_lookup_result lookup = { NULL, };
1825 sigset_t oldset;
1826 int did_block_signals = 0;
1827 struct ocfs2_dentry_lock *dl = NULL;
1828
1829 trace_ocfs2_symlink_begin(dir, dentry, symname,
1830 dentry->d_name.len, dentry->d_name.name);
1831
1832 status = dquot_initialize(dir);
1833 if (status) {
1834 mlog_errno(status);
1835 goto bail;
1836 }
1837
1838 sb = dir->i_sb;
1839 osb = OCFS2_SB(sb);
1840
1841 l = strlen(symname) + 1;
1842
1843 credits = ocfs2_calc_symlink_credits(sb);
1844
1845 /* lock the parent directory */
1846 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1847 if (status < 0) {
1848 if (status != -ENOENT)
1849 mlog_errno(status);
1850 return status;
1851 }
1852
1853 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1854 if (!ocfs2_read_links_count(dirfe)) {
1855 /* can't make a file in a deleted directory. */
1856 status = -ENOENT;
1857 goto bail;
1858 }
1859
1860 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1861 dentry->d_name.len);
1862 if (status)
1863 goto bail;
1864
1865 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1866 dentry->d_name.name,
1867 dentry->d_name.len, &lookup);
1868 if (status < 0) {
1869 mlog_errno(status);
1870 goto bail;
1871 }
1872
1873 status = ocfs2_reserve_new_inode(osb, &inode_ac);
1874 if (status < 0) {
1875 if (status != -ENOSPC)
1876 mlog_errno(status);
1877 goto bail;
1878 }
1879
1880 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1881 if (IS_ERR(inode)) {
1882 status = PTR_ERR(inode);
1883 inode = NULL;
1884 mlog_errno(status);
1885 goto bail;
1886 }
1887
1888 /* get security xattr */
1889 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1890 if (status) {
1891 if (status == -EOPNOTSUPP)
1892 si.enable = 0;
1893 else {
1894 mlog_errno(status);
1895 goto bail;
1896 }
1897 }
1898
1899 /* calculate meta data/clusters for setting security xattr */
1900 if (si.enable) {
1901 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1902 &xattr_credits, &xattr_ac);
1903 if (status < 0) {
1904 mlog_errno(status);
1905 goto bail;
1906 }
1907 }
1908
1909 /* don't reserve bitmap space for fast symlinks. */
1910 if (l > ocfs2_fast_symlink_chars(sb))
1911 want_clusters += 1;
1912
1913 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1914 if (status < 0) {
1915 if (status != -ENOSPC)
1916 mlog_errno(status);
1917 goto bail;
1918 }
1919
1920 handle = ocfs2_start_trans(osb, credits + xattr_credits);
1921 if (IS_ERR(handle)) {
1922 status = PTR_ERR(handle);
1923 handle = NULL;
1924 mlog_errno(status);
1925 goto bail;
1926 }
1927
1928 /* Starting to change things, restart is no longer possible. */
1929 ocfs2_block_signals(&oldset);
1930 did_block_signals = 1;
1931
1932 status = dquot_alloc_inode(inode);
1933 if (status)
1934 goto bail;
1935 did_quota_inode = 1;
1936
1937 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1938 dentry->d_name.name,
1939 (unsigned long long)OCFS2_I(dir)->ip_blkno,
1940 inode->i_mode);
1941
1942 status = ocfs2_mknod_locked(osb, dir, inode,
1943 0, &new_fe_bh, parent_fe_bh, handle,
1944 inode_ac);
1945 if (status < 0) {
1946 mlog_errno(status);
1947 goto bail;
1948 }
1949
1950 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1951 inode->i_rdev = 0;
1952 newsize = l - 1;
1953 inode->i_op = &ocfs2_symlink_inode_operations;
1954 if (l > ocfs2_fast_symlink_chars(sb)) {
1955 u32 offset = 0;
1956
1957 status = dquot_alloc_space_nodirty(inode,
1958 ocfs2_clusters_to_bytes(osb->sb, 1));
1959 if (status)
1960 goto bail;
1961 did_quota = 1;
1962 inode->i_mapping->a_ops = &ocfs2_aops;
1963 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1964 new_fe_bh,
1965 handle, data_ac, NULL,
1966 NULL);
1967 if (status < 0) {
1968 if (status != -ENOSPC && status != -EINTR) {
1969 mlog(ML_ERROR,
1970 "Failed to extend file to %llu\n",
1971 (unsigned long long)newsize);
1972 mlog_errno(status);
1973 status = -ENOSPC;
1974 }
1975 goto bail;
1976 }
1977 i_size_write(inode, newsize);
1978 inode->i_blocks = ocfs2_inode_sector_count(inode);
1979 } else {
1980 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1981 memcpy((char *) fe->id2.i_symlink, symname, l);
1982 i_size_write(inode, newsize);
1983 inode->i_blocks = 0;
1984 }
1985
1986 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1987 if (status < 0) {
1988 mlog_errno(status);
1989 goto bail;
1990 }
1991
1992 if (!ocfs2_inode_is_fast_symlink(inode)) {
1993 status = ocfs2_create_symlink_data(osb, handle, inode,
1994 symname);
1995 if (status < 0) {
1996 mlog_errno(status);
1997 goto bail;
1998 }
1999 }
2000
2001 if (si.enable) {
2002 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
2003 xattr_ac, data_ac);
2004 if (status < 0) {
2005 mlog_errno(status);
2006 goto bail;
2007 }
2008 }
2009
2010 /*
2011 * Do this before adding the entry to the directory. We add
2012 * also set d_op after success so that ->d_iput() will cleanup
2013 * the dentry lock even if ocfs2_add_entry() fails below.
2014 */
2015 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
2016 if (status) {
2017 mlog_errno(status);
2018 goto bail;
2019 }
2020
2021 dl = dentry->d_fsdata;
2022
2023 status = ocfs2_add_entry(handle, dentry, inode,
2024 le64_to_cpu(fe->i_blkno), parent_fe_bh,
2025 &lookup);
2026 if (status < 0) {
2027 mlog_errno(status);
2028 goto bail;
2029 }
2030
2031 insert_inode_hash(inode);
2032 d_instantiate(dentry, inode);
2033 bail:
2034 if (status < 0 && did_quota)
2035 dquot_free_space_nodirty(inode,
2036 ocfs2_clusters_to_bytes(osb->sb, 1));
2037 if (status < 0 && did_quota_inode)
2038 dquot_free_inode(inode);
2039 if (handle)
2040 ocfs2_commit_trans(osb, handle);
2041
2042 ocfs2_inode_unlock(dir, 1);
2043 if (did_block_signals)
2044 ocfs2_unblock_signals(&oldset);
2045
2046 brelse(new_fe_bh);
2047 brelse(parent_fe_bh);
2048 kfree(si.value);
2049 ocfs2_free_dir_lookup_result(&lookup);
2050 if (inode_ac)
2051 ocfs2_free_alloc_context(inode_ac);
2052 if (data_ac)
2053 ocfs2_free_alloc_context(data_ac);
2054 if (xattr_ac)
2055 ocfs2_free_alloc_context(xattr_ac);
2056 if ((status < 0) && inode) {
2057 if (dl)
2058 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2059
2060 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
2061 clear_nlink(inode);
2062 iput(inode);
2063 }
2064
2065 if (status)
2066 mlog_errno(status);
2067
2068 return status;
2069 }
2070
2071 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2072 {
2073 int status, namelen;
2074
2075 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2076 (long long)blkno);
2077 if (namelen <= 0) {
2078 if (namelen)
2079 status = namelen;
2080 else
2081 status = -EINVAL;
2082 mlog_errno(status);
2083 goto bail;
2084 }
2085 if (namelen != OCFS2_ORPHAN_NAMELEN) {
2086 status = -EINVAL;
2087 mlog_errno(status);
2088 goto bail;
2089 }
2090
2091 trace_ocfs2_blkno_stringify(blkno, name, namelen);
2092
2093 status = 0;
2094 bail:
2095 if (status < 0)
2096 mlog_errno(status);
2097 return status;
2098 }
2099
2100 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2101 struct inode **ret_orphan_dir,
2102 struct buffer_head **ret_orphan_dir_bh)
2103 {
2104 struct inode *orphan_dir_inode;
2105 struct buffer_head *orphan_dir_bh = NULL;
2106 int ret = 0;
2107
2108 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2109 ORPHAN_DIR_SYSTEM_INODE,
2110 osb->slot_num);
2111 if (!orphan_dir_inode) {
2112 ret = -ENOENT;
2113 mlog_errno(ret);
2114 return ret;
2115 }
2116
2117 mutex_lock(&orphan_dir_inode->i_mutex);
2118
2119 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2120 if (ret < 0) {
2121 mutex_unlock(&orphan_dir_inode->i_mutex);
2122 iput(orphan_dir_inode);
2123
2124 mlog_errno(ret);
2125 return ret;
2126 }
2127
2128 *ret_orphan_dir = orphan_dir_inode;
2129 *ret_orphan_dir_bh = orphan_dir_bh;
2130
2131 return 0;
2132 }
2133
2134 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2135 struct buffer_head *orphan_dir_bh,
2136 u64 blkno,
2137 char *name,
2138 struct ocfs2_dir_lookup_result *lookup,
2139 bool dio)
2140 {
2141 int ret;
2142 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2143 int namelen = dio ?
2144 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2145 OCFS2_ORPHAN_NAMELEN;
2146
2147 if (dio) {
2148 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2149 OCFS2_DIO_ORPHAN_PREFIX);
2150 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2151 ret = -EINVAL;
2152 mlog_errno(ret);
2153 return ret;
2154 }
2155
2156 ret = ocfs2_blkno_stringify(blkno,
2157 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2158 } else
2159 ret = ocfs2_blkno_stringify(blkno, name);
2160 if (ret < 0) {
2161 mlog_errno(ret);
2162 return ret;
2163 }
2164
2165 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2166 orphan_dir_bh, name,
2167 namelen, lookup);
2168 if (ret < 0) {
2169 mlog_errno(ret);
2170 return ret;
2171 }
2172
2173 return 0;
2174 }
2175
2176 /**
2177 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2178 * insertion of an orphan.
2179 * @osb: ocfs2 file system
2180 * @ret_orphan_dir: Orphan dir inode - returned locked!
2181 * @blkno: Actual block number of the inode to be inserted into orphan dir.
2182 * @lookup: dir lookup result, to be passed back into functions like
2183 * ocfs2_orphan_add
2184 *
2185 * Returns zero on success and the ret_orphan_dir, name and lookup
2186 * fields will be populated.
2187 *
2188 * Returns non-zero on failure.
2189 */
2190 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2191 struct inode **ret_orphan_dir,
2192 u64 blkno,
2193 char *name,
2194 struct ocfs2_dir_lookup_result *lookup,
2195 bool dio)
2196 {
2197 struct inode *orphan_dir_inode = NULL;
2198 struct buffer_head *orphan_dir_bh = NULL;
2199 int ret = 0;
2200
2201 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2202 &orphan_dir_bh);
2203 if (ret < 0) {
2204 mlog_errno(ret);
2205 return ret;
2206 }
2207
2208 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2209 blkno, name, lookup, dio);
2210 if (ret < 0) {
2211 mlog_errno(ret);
2212 goto out;
2213 }
2214
2215 *ret_orphan_dir = orphan_dir_inode;
2216
2217 out:
2218 brelse(orphan_dir_bh);
2219
2220 if (ret) {
2221 ocfs2_inode_unlock(orphan_dir_inode, 1);
2222 mutex_unlock(&orphan_dir_inode->i_mutex);
2223 iput(orphan_dir_inode);
2224 }
2225
2226 if (ret)
2227 mlog_errno(ret);
2228 return ret;
2229 }
2230
2231 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2232 handle_t *handle,
2233 struct inode *inode,
2234 struct buffer_head *fe_bh,
2235 char *name,
2236 struct ocfs2_dir_lookup_result *lookup,
2237 struct inode *orphan_dir_inode,
2238 bool dio)
2239 {
2240 struct buffer_head *orphan_dir_bh = NULL;
2241 int status = 0;
2242 struct ocfs2_dinode *orphan_fe;
2243 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2244 int namelen = dio ?
2245 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2246 OCFS2_ORPHAN_NAMELEN;
2247
2248 trace_ocfs2_orphan_add_begin(
2249 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2250
2251 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2252 if (status < 0) {
2253 mlog_errno(status);
2254 goto leave;
2255 }
2256
2257 status = ocfs2_journal_access_di(handle,
2258 INODE_CACHE(orphan_dir_inode),
2259 orphan_dir_bh,
2260 OCFS2_JOURNAL_ACCESS_WRITE);
2261 if (status < 0) {
2262 mlog_errno(status);
2263 goto leave;
2264 }
2265
2266 /*
2267 * We're going to journal the change of i_flags and i_orphaned_slot.
2268 * It's safe anyway, though some callers may duplicate the journaling.
2269 * Journaling within the func just make the logic look more
2270 * straightforward.
2271 */
2272 status = ocfs2_journal_access_di(handle,
2273 INODE_CACHE(inode),
2274 fe_bh,
2275 OCFS2_JOURNAL_ACCESS_WRITE);
2276 if (status < 0) {
2277 mlog_errno(status);
2278 goto leave;
2279 }
2280
2281 /* we're a cluster, and nlink can change on disk from
2282 * underneath us... */
2283 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2284 if (S_ISDIR(inode->i_mode))
2285 ocfs2_add_links_count(orphan_fe, 1);
2286 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2287 ocfs2_journal_dirty(handle, orphan_dir_bh);
2288
2289 status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2290 namelen, inode,
2291 OCFS2_I(inode)->ip_blkno,
2292 orphan_dir_bh, lookup);
2293 if (status < 0) {
2294 mlog_errno(status);
2295 goto rollback;
2296 }
2297
2298 if (dio) {
2299 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan
2300 * slot.
2301 */
2302 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2303 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num);
2304 } else {
2305 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2306 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2307
2308 /* Record which orphan dir our inode now resides
2309 * in. delete_inode will use this to determine which orphan
2310 * dir to lock. */
2311 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2312 }
2313
2314 ocfs2_journal_dirty(handle, fe_bh);
2315
2316 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2317 osb->slot_num);
2318
2319 rollback:
2320 if (status < 0) {
2321 if (S_ISDIR(inode->i_mode))
2322 ocfs2_add_links_count(orphan_fe, -1);
2323 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2324 }
2325
2326 leave:
2327 brelse(orphan_dir_bh);
2328
2329 return status;
2330 }
2331
2332 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2333 int ocfs2_orphan_del(struct ocfs2_super *osb,
2334 handle_t *handle,
2335 struct inode *orphan_dir_inode,
2336 struct inode *inode,
2337 struct buffer_head *orphan_dir_bh,
2338 bool dio)
2339 {
2340 const int namelen = OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN;
2341 char name[namelen + 1];
2342 struct ocfs2_dinode *orphan_fe;
2343 int status = 0;
2344 struct ocfs2_dir_lookup_result lookup = { NULL, };
2345
2346 if (dio) {
2347 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2348 OCFS2_DIO_ORPHAN_PREFIX);
2349 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2350 status = -EINVAL;
2351 mlog_errno(status);
2352 return status;
2353 }
2354
2355 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno,
2356 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2357 } else
2358 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2359 if (status < 0) {
2360 mlog_errno(status);
2361 goto leave;
2362 }
2363
2364 trace_ocfs2_orphan_del(
2365 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2366 name, strlen(name));
2367
2368 /* find it's spot in the orphan directory */
2369 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode,
2370 &lookup);
2371 if (status) {
2372 mlog_errno(status);
2373 goto leave;
2374 }
2375
2376 /* remove it from the orphan directory */
2377 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2378 if (status < 0) {
2379 mlog_errno(status);
2380 goto leave;
2381 }
2382
2383 status = ocfs2_journal_access_di(handle,
2384 INODE_CACHE(orphan_dir_inode),
2385 orphan_dir_bh,
2386 OCFS2_JOURNAL_ACCESS_WRITE);
2387 if (status < 0) {
2388 mlog_errno(status);
2389 goto leave;
2390 }
2391
2392 /* do the i_nlink dance! :) */
2393 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2394 if (S_ISDIR(inode->i_mode))
2395 ocfs2_add_links_count(orphan_fe, -1);
2396 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2397 ocfs2_journal_dirty(handle, orphan_dir_bh);
2398
2399 leave:
2400 ocfs2_free_dir_lookup_result(&lookup);
2401
2402 if (status)
2403 mlog_errno(status);
2404 return status;
2405 }
2406
2407 /**
2408 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2409 * allocated file. This is different from the typical 'add to orphan dir'
2410 * operation in that the inode does not yet exist. This is a problem because
2411 * the orphan dir stringifies the inode block number to come up with it's
2412 * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2413 * problem. This function works around it by calling deeper into the orphan
2414 * and suballoc code than other callers. Use this only by necessity.
2415 * @dir: The directory which this inode will ultimately wind up under - not the
2416 * orphan dir!
2417 * @dir_bh: buffer_head the @dir inode block
2418 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2419 * with the string to be used for orphan dirent. Pass back to the orphan dir
2420 * code.
2421 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2422 * dir code.
2423 * @ret_di_blkno: block number where the new inode will be allocated.
2424 * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2425 * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2426 *
2427 * Returns zero on success and the ret_orphan_dir, name and lookup
2428 * fields will be populated.
2429 *
2430 * Returns non-zero on failure.
2431 */
2432 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2433 struct buffer_head *dir_bh,
2434 char *orphan_name,
2435 struct inode **ret_orphan_dir,
2436 u64 *ret_di_blkno,
2437 struct ocfs2_dir_lookup_result *orphan_insert,
2438 struct ocfs2_alloc_context **ret_inode_ac)
2439 {
2440 int ret;
2441 u64 di_blkno;
2442 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2443 struct inode *orphan_dir = NULL;
2444 struct buffer_head *orphan_dir_bh = NULL;
2445 struct ocfs2_alloc_context *inode_ac = NULL;
2446
2447 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2448 if (ret < 0) {
2449 mlog_errno(ret);
2450 return ret;
2451 }
2452
2453 /* reserve an inode spot */
2454 ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2455 if (ret < 0) {
2456 if (ret != -ENOSPC)
2457 mlog_errno(ret);
2458 goto out;
2459 }
2460
2461 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2462 &di_blkno);
2463 if (ret) {
2464 mlog_errno(ret);
2465 goto out;
2466 }
2467
2468 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2469 di_blkno, orphan_name, orphan_insert,
2470 false);
2471 if (ret < 0) {
2472 mlog_errno(ret);
2473 goto out;
2474 }
2475
2476 out:
2477 if (ret == 0) {
2478 *ret_orphan_dir = orphan_dir;
2479 *ret_di_blkno = di_blkno;
2480 *ret_inode_ac = inode_ac;
2481 /*
2482 * orphan_name and orphan_insert are already up to
2483 * date via prepare_orphan_dir
2484 */
2485 } else {
2486 /* Unroll reserve_new_inode* */
2487 if (inode_ac)
2488 ocfs2_free_alloc_context(inode_ac);
2489
2490 /* Unroll orphan dir locking */
2491 mutex_unlock(&orphan_dir->i_mutex);
2492 ocfs2_inode_unlock(orphan_dir, 1);
2493 iput(orphan_dir);
2494 }
2495
2496 brelse(orphan_dir_bh);
2497
2498 return ret;
2499 }
2500
2501 int ocfs2_create_inode_in_orphan(struct inode *dir,
2502 int mode,
2503 struct inode **new_inode)
2504 {
2505 int status, did_quota_inode = 0;
2506 struct inode *inode = NULL;
2507 struct inode *orphan_dir = NULL;
2508 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2509 struct ocfs2_dinode *di = NULL;
2510 handle_t *handle = NULL;
2511 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2512 struct buffer_head *parent_di_bh = NULL;
2513 struct buffer_head *new_di_bh = NULL;
2514 struct ocfs2_alloc_context *inode_ac = NULL;
2515 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2516 u64 uninitialized_var(di_blkno), suballoc_loc;
2517 u16 suballoc_bit;
2518
2519 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2520 if (status < 0) {
2521 if (status != -ENOENT)
2522 mlog_errno(status);
2523 return status;
2524 }
2525
2526 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2527 orphan_name, &orphan_dir,
2528 &di_blkno, &orphan_insert, &inode_ac);
2529 if (status < 0) {
2530 if (status != -ENOSPC)
2531 mlog_errno(status);
2532 goto leave;
2533 }
2534
2535 inode = ocfs2_get_init_inode(dir, mode);
2536 if (IS_ERR(inode)) {
2537 status = PTR_ERR(inode);
2538 inode = NULL;
2539 mlog_errno(status);
2540 goto leave;
2541 }
2542
2543 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2544 if (IS_ERR(handle)) {
2545 status = PTR_ERR(handle);
2546 handle = NULL;
2547 mlog_errno(status);
2548 goto leave;
2549 }
2550
2551 status = dquot_alloc_inode(inode);
2552 if (status)
2553 goto leave;
2554 did_quota_inode = 1;
2555
2556 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2557 &suballoc_loc,
2558 &suballoc_bit, di_blkno);
2559 if (status < 0) {
2560 mlog_errno(status);
2561 goto leave;
2562 }
2563
2564 clear_nlink(inode);
2565 /* do the real work now. */
2566 status = __ocfs2_mknod_locked(dir, inode,
2567 0, &new_di_bh, parent_di_bh, handle,
2568 inode_ac, di_blkno, suballoc_loc,
2569 suballoc_bit);
2570 if (status < 0) {
2571 mlog_errno(status);
2572 goto leave;
2573 }
2574
2575 di = (struct ocfs2_dinode *)new_di_bh->b_data;
2576 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2577 &orphan_insert, orphan_dir, false);
2578 if (status < 0) {
2579 mlog_errno(status);
2580 goto leave;
2581 }
2582
2583 /* get open lock so that only nodes can't remove it from orphan dir. */
2584 status = ocfs2_open_lock(inode);
2585 if (status < 0)
2586 mlog_errno(status);
2587
2588 insert_inode_hash(inode);
2589 leave:
2590 if (status < 0 && did_quota_inode)
2591 dquot_free_inode(inode);
2592 if (handle)
2593 ocfs2_commit_trans(osb, handle);
2594
2595 if (orphan_dir) {
2596 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2597 ocfs2_inode_unlock(orphan_dir, 1);
2598 mutex_unlock(&orphan_dir->i_mutex);
2599 iput(orphan_dir);
2600 }
2601
2602 if ((status < 0) && inode) {
2603 clear_nlink(inode);
2604 iput(inode);
2605 }
2606
2607 if (inode_ac)
2608 ocfs2_free_alloc_context(inode_ac);
2609
2610 brelse(new_di_bh);
2611
2612 if (!status)
2613 *new_inode = inode;
2614
2615 ocfs2_free_dir_lookup_result(&orphan_insert);
2616
2617 ocfs2_inode_unlock(dir, 1);
2618 brelse(parent_di_bh);
2619 return status;
2620 }
2621
2622 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
2623 struct inode *inode)
2624 {
2625 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2626 struct inode *orphan_dir_inode = NULL;
2627 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2628 struct buffer_head *di_bh = NULL;
2629 int status = 0;
2630 handle_t *handle = NULL;
2631 struct ocfs2_dinode *di = NULL;
2632
2633 status = ocfs2_inode_lock(inode, &di_bh, 1);
2634 if (status < 0) {
2635 mlog_errno(status);
2636 goto bail;
2637 }
2638
2639 di = (struct ocfs2_dinode *) di_bh->b_data;
2640 /*
2641 * Another append dio crashed?
2642 * If so, manually recover it first.
2643 */
2644 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
2645 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode));
2646 if (status < 0) {
2647 if (status != -ENOSPC)
2648 mlog_errno(status);
2649 goto bail_unlock_inode;
2650 }
2651
2652 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0);
2653 if (status < 0) {
2654 mlog_errno(status);
2655 goto bail_unlock_inode;
2656 }
2657 }
2658
2659 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
2660 OCFS2_I(inode)->ip_blkno,
2661 orphan_name,
2662 &orphan_insert,
2663 true);
2664 if (status < 0) {
2665 mlog_errno(status);
2666 goto bail_unlock_inode;
2667 }
2668
2669 handle = ocfs2_start_trans(osb,
2670 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS);
2671 if (IS_ERR(handle)) {
2672 status = PTR_ERR(handle);
2673 goto bail_unlock_orphan;
2674 }
2675
2676 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
2677 &orphan_insert, orphan_dir_inode, true);
2678 if (status)
2679 mlog_errno(status);
2680
2681 ocfs2_commit_trans(osb, handle);
2682
2683 bail_unlock_orphan:
2684 ocfs2_inode_unlock(orphan_dir_inode, 1);
2685 mutex_unlock(&orphan_dir_inode->i_mutex);
2686 iput(orphan_dir_inode);
2687
2688 ocfs2_free_dir_lookup_result(&orphan_insert);
2689
2690 bail_unlock_inode:
2691 ocfs2_inode_unlock(inode, 1);
2692 brelse(di_bh);
2693
2694 bail:
2695 return status;
2696 }
2697
2698 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
2699 struct inode *inode, struct buffer_head *di_bh,
2700 int update_isize, loff_t end)
2701 {
2702 struct inode *orphan_dir_inode = NULL;
2703 struct buffer_head *orphan_dir_bh = NULL;
2704 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2705 handle_t *handle = NULL;
2706 int status = 0;
2707
2708 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2709 ORPHAN_DIR_SYSTEM_INODE,
2710 le16_to_cpu(di->i_dio_orphaned_slot));
2711 if (!orphan_dir_inode) {
2712 status = -ENOENT;
2713 mlog_errno(status);
2714 goto bail;
2715 }
2716
2717 mutex_lock(&orphan_dir_inode->i_mutex);
2718 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2719 if (status < 0) {
2720 mutex_unlock(&orphan_dir_inode->i_mutex);
2721 iput(orphan_dir_inode);
2722 mlog_errno(status);
2723 goto bail;
2724 }
2725
2726 handle = ocfs2_start_trans(osb,
2727 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS);
2728 if (IS_ERR(handle)) {
2729 status = PTR_ERR(handle);
2730 goto bail_unlock_orphan;
2731 }
2732
2733 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)));
2734
2735 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
2736 inode, orphan_dir_bh, true);
2737 if (status < 0) {
2738 mlog_errno(status);
2739 goto bail_commit;
2740 }
2741
2742 status = ocfs2_journal_access_di(handle,
2743 INODE_CACHE(inode),
2744 di_bh,
2745 OCFS2_JOURNAL_ACCESS_WRITE);
2746 if (status < 0) {
2747 mlog_errno(status);
2748 goto bail_commit;
2749 }
2750
2751 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2752 di->i_dio_orphaned_slot = 0;
2753
2754 if (update_isize) {
2755 status = ocfs2_set_inode_size(handle, inode, di_bh, end);
2756 if (status)
2757 mlog_errno(status);
2758 } else
2759 ocfs2_journal_dirty(handle, di_bh);
2760
2761 bail_commit:
2762 ocfs2_commit_trans(osb, handle);
2763
2764 bail_unlock_orphan:
2765 ocfs2_inode_unlock(orphan_dir_inode, 1);
2766 mutex_unlock(&orphan_dir_inode->i_mutex);
2767 brelse(orphan_dir_bh);
2768 iput(orphan_dir_inode);
2769
2770 bail:
2771 return status;
2772 }
2773
2774 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2775 struct inode *inode,
2776 struct dentry *dentry)
2777 {
2778 int status = 0;
2779 struct buffer_head *parent_di_bh = NULL;
2780 handle_t *handle = NULL;
2781 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2782 struct ocfs2_dinode *dir_di, *di;
2783 struct inode *orphan_dir_inode = NULL;
2784 struct buffer_head *orphan_dir_bh = NULL;
2785 struct buffer_head *di_bh = NULL;
2786 struct ocfs2_dir_lookup_result lookup = { NULL, };
2787
2788 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2789 dentry->d_name.len, dentry->d_name.name,
2790 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2791 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2792
2793 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2794 if (status < 0) {
2795 if (status != -ENOENT)
2796 mlog_errno(status);
2797 return status;
2798 }
2799
2800 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2801 if (!dir_di->i_links_count) {
2802 /* can't make a file in a deleted directory. */
2803 status = -ENOENT;
2804 goto leave;
2805 }
2806
2807 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2808 dentry->d_name.len);
2809 if (status)
2810 goto leave;
2811
2812 /* get a spot inside the dir. */
2813 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2814 dentry->d_name.name,
2815 dentry->d_name.len, &lookup);
2816 if (status < 0) {
2817 mlog_errno(status);
2818 goto leave;
2819 }
2820
2821 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2822 ORPHAN_DIR_SYSTEM_INODE,
2823 osb->slot_num);
2824 if (!orphan_dir_inode) {
2825 status = -ENOENT;
2826 mlog_errno(status);
2827 goto leave;
2828 }
2829
2830 mutex_lock(&orphan_dir_inode->i_mutex);
2831
2832 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2833 if (status < 0) {
2834 mlog_errno(status);
2835 mutex_unlock(&orphan_dir_inode->i_mutex);
2836 iput(orphan_dir_inode);
2837 goto leave;
2838 }
2839
2840 status = ocfs2_read_inode_block(inode, &di_bh);
2841 if (status < 0) {
2842 mlog_errno(status);
2843 goto orphan_unlock;
2844 }
2845
2846 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2847 if (IS_ERR(handle)) {
2848 status = PTR_ERR(handle);
2849 handle = NULL;
2850 mlog_errno(status);
2851 goto orphan_unlock;
2852 }
2853
2854 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2855 di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2856 if (status < 0) {
2857 mlog_errno(status);
2858 goto out_commit;
2859 }
2860
2861 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2862 orphan_dir_bh, false);
2863 if (status < 0) {
2864 mlog_errno(status);
2865 goto out_commit;
2866 }
2867
2868 di = (struct ocfs2_dinode *)di_bh->b_data;
2869 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2870 di->i_orphaned_slot = 0;
2871 set_nlink(inode, 1);
2872 ocfs2_set_links_count(di, inode->i_nlink);
2873 ocfs2_update_inode_fsync_trans(handle, inode, 1);
2874 ocfs2_journal_dirty(handle, di_bh);
2875
2876 status = ocfs2_add_entry(handle, dentry, inode,
2877 OCFS2_I(inode)->ip_blkno, parent_di_bh,
2878 &lookup);
2879 if (status < 0) {
2880 mlog_errno(status);
2881 goto out_commit;
2882 }
2883
2884 status = ocfs2_dentry_attach_lock(dentry, inode,
2885 OCFS2_I(dir)->ip_blkno);
2886 if (status) {
2887 mlog_errno(status);
2888 goto out_commit;
2889 }
2890
2891 d_instantiate(dentry, inode);
2892 status = 0;
2893 out_commit:
2894 ocfs2_commit_trans(osb, handle);
2895 orphan_unlock:
2896 ocfs2_inode_unlock(orphan_dir_inode, 1);
2897 mutex_unlock(&orphan_dir_inode->i_mutex);
2898 iput(orphan_dir_inode);
2899 leave:
2900
2901 ocfs2_inode_unlock(dir, 1);
2902
2903 brelse(di_bh);
2904 brelse(parent_di_bh);
2905 brelse(orphan_dir_bh);
2906
2907 ocfs2_free_dir_lookup_result(&lookup);
2908
2909 if (status)
2910 mlog_errno(status);
2911
2912 return status;
2913 }
2914
2915 const struct inode_operations ocfs2_dir_iops = {
2916 .create = ocfs2_create,
2917 .lookup = ocfs2_lookup,
2918 .link = ocfs2_link,
2919 .unlink = ocfs2_unlink,
2920 .rmdir = ocfs2_unlink,
2921 .symlink = ocfs2_symlink,
2922 .mkdir = ocfs2_mkdir,
2923 .mknod = ocfs2_mknod,
2924 .rename = ocfs2_rename,
2925 .setattr = ocfs2_setattr,
2926 .getattr = ocfs2_getattr,
2927 .permission = ocfs2_permission,
2928 .setxattr = generic_setxattr,
2929 .getxattr = generic_getxattr,
2930 .listxattr = ocfs2_listxattr,
2931 .removexattr = generic_removexattr,
2932 .fiemap = ocfs2_fiemap,
2933 .get_acl = ocfs2_iop_get_acl,
2934 .set_acl = ocfs2_iop_set_acl,
2935 };
Linux with added FPC-III support