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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 (child_locked)
1039 ocfs2_inode_unlock(inode, 1);
1040
1041 ocfs2_inode_unlock(dir, 1);
1042
1043 if (orphan_dir) {
1044 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1045 ocfs2_inode_unlock(orphan_dir, 1);
1046 mutex_unlock(&orphan_dir->i_mutex);
1047 iput(orphan_dir);
1048 }
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 /* make sure both dirs have bhs
1313 * get an extra ref on old_dir_bh if old==new */
1314 if (!new_dir_bh) {
1315 if (old_dir_bh) {
1316 new_dir_bh = old_dir_bh;
1317 get_bh(new_dir_bh);
1318 } else {
1319 mlog(ML_ERROR, "no old_dir_bh!\n");
1320 status = -EIO;
1321 goto bail;
1322 }
1323 }
1324
1325 /*
1326 * Aside from allowing a meta data update, the locking here
1327 * also ensures that the downconvert thread on other nodes
1328 * won't have to concurrently downconvert the inode and the
1329 * dentry locks.
1330 */
1331 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1332 OI_LS_PARENT);
1333 if (status < 0) {
1334 if (status != -ENOENT)
1335 mlog_errno(status);
1336 goto bail;
1337 }
1338 old_child_locked = 1;
1339
1340 status = ocfs2_remote_dentry_delete(old_dentry);
1341 if (status < 0) {
1342 mlog_errno(status);
1343 goto bail;
1344 }
1345
1346 if (S_ISDIR(old_inode->i_mode)) {
1347 u64 old_inode_parent;
1348
1349 update_dot_dot = 1;
1350 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1351 old_inode,
1352 &old_inode_dot_dot_res);
1353 if (status) {
1354 status = -EIO;
1355 goto bail;
1356 }
1357
1358 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1359 status = -EIO;
1360 goto bail;
1361 }
1362
1363 if (!new_inode && new_dir != old_dir &&
1364 new_dir->i_nlink >= ocfs2_link_max(osb)) {
1365 status = -EMLINK;
1366 goto bail;
1367 }
1368 }
1369
1370 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1371 old_dentry->d_name.len,
1372 &old_de_ino);
1373 if (status) {
1374 status = -ENOENT;
1375 goto bail;
1376 }
1377
1378 /*
1379 * Check for inode number is _not_ due to possible IO errors.
1380 * We might rmdir the source, keep it as pwd of some process
1381 * and merrily kill the link to whatever was created under the
1382 * same name. Goodbye sticky bit ;-<
1383 */
1384 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1385 status = -ENOENT;
1386 goto bail;
1387 }
1388
1389 /* check if the target already exists (in which case we need
1390 * to delete it */
1391 status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1392 new_dentry->d_name.len,
1393 &newfe_blkno, new_dir,
1394 &target_lookup_res);
1395 /* The only error we allow here is -ENOENT because the new
1396 * file not existing is perfectly valid. */
1397 if ((status < 0) && (status != -ENOENT)) {
1398 /* If we cannot find the file specified we should just */
1399 /* return the error... */
1400 mlog_errno(status);
1401 goto bail;
1402 }
1403 if (status == 0)
1404 target_exists = 1;
1405
1406 if (!target_exists && new_inode) {
1407 /*
1408 * Target was unlinked by another node while we were
1409 * waiting to get to ocfs2_rename(). There isn't
1410 * anything we can do here to help the situation, so
1411 * bubble up the appropriate error.
1412 */
1413 status = -ENOENT;
1414 goto bail;
1415 }
1416
1417 /* In case we need to overwrite an existing file, we blow it
1418 * away first */
1419 if (target_exists) {
1420 /* VFS didn't think there existed an inode here, but
1421 * someone else in the cluster must have raced our
1422 * rename to create one. Today we error cleanly, in
1423 * the future we should consider calling iget to build
1424 * a new struct inode for this entry. */
1425 if (!new_inode) {
1426 status = -EACCES;
1427
1428 trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1429 new_dentry->d_name.name);
1430 goto bail;
1431 }
1432
1433 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1434 status = -EACCES;
1435
1436 trace_ocfs2_rename_disagree(
1437 (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1438 (unsigned long long)newfe_blkno,
1439 OCFS2_I(new_inode)->ip_flags);
1440 goto bail;
1441 }
1442
1443 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1444 if (status < 0) {
1445 if (status != -ENOENT)
1446 mlog_errno(status);
1447 goto bail;
1448 }
1449 new_child_locked = 1;
1450
1451 status = ocfs2_remote_dentry_delete(new_dentry);
1452 if (status < 0) {
1453 mlog_errno(status);
1454 goto bail;
1455 }
1456
1457 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1458
1459 trace_ocfs2_rename_over_existing(
1460 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1461 (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1462
1463 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1464 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1465 OCFS2_I(new_inode)->ip_blkno,
1466 orphan_name, &orphan_insert,
1467 false);
1468 if (status < 0) {
1469 mlog_errno(status);
1470 goto bail;
1471 }
1472 should_add_orphan = true;
1473 }
1474 } else {
1475 BUG_ON(d_inode(new_dentry->d_parent) != new_dir);
1476
1477 status = ocfs2_check_dir_for_entry(new_dir,
1478 new_dentry->d_name.name,
1479 new_dentry->d_name.len);
1480 if (status)
1481 goto bail;
1482
1483 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1484 new_dentry->d_name.name,
1485 new_dentry->d_name.len,
1486 &target_insert);
1487 if (status < 0) {
1488 mlog_errno(status);
1489 goto bail;
1490 }
1491 }
1492
1493 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1494 if (IS_ERR(handle)) {
1495 status = PTR_ERR(handle);
1496 handle = NULL;
1497 mlog_errno(status);
1498 goto bail;
1499 }
1500
1501 if (target_exists) {
1502 if (S_ISDIR(new_inode->i_mode)) {
1503 if (new_inode->i_nlink != 2 ||
1504 !ocfs2_empty_dir(new_inode)) {
1505 status = -ENOTEMPTY;
1506 goto bail;
1507 }
1508 }
1509 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1510 newfe_bh,
1511 OCFS2_JOURNAL_ACCESS_WRITE);
1512 if (status < 0) {
1513 mlog_errno(status);
1514 goto bail;
1515 }
1516
1517 /* change the dirent to point to the correct inode */
1518 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1519 old_inode);
1520 if (status < 0) {
1521 mlog_errno(status);
1522 goto bail;
1523 }
1524 new_dir->i_version++;
1525
1526 if (S_ISDIR(new_inode->i_mode))
1527 ocfs2_set_links_count(newfe, 0);
1528 else
1529 ocfs2_add_links_count(newfe, -1);
1530 ocfs2_journal_dirty(handle, newfe_bh);
1531 if (should_add_orphan) {
1532 status = ocfs2_orphan_add(osb, handle, new_inode,
1533 newfe_bh, orphan_name,
1534 &orphan_insert, orphan_dir, false);
1535 if (status < 0) {
1536 mlog_errno(status);
1537 goto bail;
1538 }
1539 }
1540 } else {
1541 /* if the name was not found in new_dir, add it now */
1542 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1543 OCFS2_I(old_inode)->ip_blkno,
1544 new_dir_bh, &target_insert);
1545 }
1546
1547 old_inode->i_ctime = CURRENT_TIME;
1548 mark_inode_dirty(old_inode);
1549
1550 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1551 old_inode_bh,
1552 OCFS2_JOURNAL_ACCESS_WRITE);
1553 if (status >= 0) {
1554 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1555
1556 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1557 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1558 ocfs2_journal_dirty(handle, old_inode_bh);
1559 } else
1560 mlog_errno(status);
1561
1562 /*
1563 * Now that the name has been added to new_dir, remove the old name.
1564 *
1565 * We don't keep any directory entry context around until now
1566 * because the insert might have changed the type of directory
1567 * we're dealing with.
1568 */
1569 status = ocfs2_find_entry(old_dentry->d_name.name,
1570 old_dentry->d_name.len, old_dir,
1571 &old_entry_lookup);
1572 if (status)
1573 goto bail;
1574
1575 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1576 if (status < 0) {
1577 mlog_errno(status);
1578 goto bail;
1579 }
1580
1581 if (new_inode) {
1582 drop_nlink(new_inode);
1583 new_inode->i_ctime = CURRENT_TIME;
1584 }
1585 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1586
1587 if (update_dot_dot) {
1588 status = ocfs2_update_entry(old_inode, handle,
1589 &old_inode_dot_dot_res, new_dir);
1590 drop_nlink(old_dir);
1591 if (new_inode) {
1592 drop_nlink(new_inode);
1593 } else {
1594 inc_nlink(new_dir);
1595 mark_inode_dirty(new_dir);
1596 }
1597 }
1598 mark_inode_dirty(old_dir);
1599 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1600 if (new_inode) {
1601 mark_inode_dirty(new_inode);
1602 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1603 }
1604
1605 if (old_dir != new_dir) {
1606 /* Keep the same times on both directories.*/
1607 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1608
1609 /*
1610 * This will also pick up the i_nlink change from the
1611 * block above.
1612 */
1613 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1614 }
1615
1616 if (old_dir_nlink != old_dir->i_nlink) {
1617 if (!old_dir_bh) {
1618 mlog(ML_ERROR, "need to change nlink for old dir "
1619 "%llu from %d to %d but bh is NULL!\n",
1620 (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1621 (int)old_dir_nlink, old_dir->i_nlink);
1622 } else {
1623 struct ocfs2_dinode *fe;
1624 status = ocfs2_journal_access_di(handle,
1625 INODE_CACHE(old_dir),
1626 old_dir_bh,
1627 OCFS2_JOURNAL_ACCESS_WRITE);
1628 fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1629 ocfs2_set_links_count(fe, old_dir->i_nlink);
1630 ocfs2_journal_dirty(handle, old_dir_bh);
1631 }
1632 }
1633 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1634 status = 0;
1635 bail:
1636 if (rename_lock)
1637 ocfs2_rename_unlock(osb);
1638
1639 if (handle)
1640 ocfs2_commit_trans(osb, handle);
1641
1642 if (parents_locked)
1643 ocfs2_double_unlock(old_dir, new_dir);
1644
1645 if (old_child_locked)
1646 ocfs2_inode_unlock(old_inode, 1);
1647
1648 if (new_child_locked)
1649 ocfs2_inode_unlock(new_inode, 1);
1650
1651 if (orphan_dir) {
1652 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1653 ocfs2_inode_unlock(orphan_dir, 1);
1654 mutex_unlock(&orphan_dir->i_mutex);
1655 iput(orphan_dir);
1656 }
1657
1658 if (new_inode)
1659 sync_mapping_buffers(old_inode->i_mapping);
1660
1661 if (new_inode)
1662 iput(new_inode);
1663
1664 ocfs2_free_dir_lookup_result(&target_lookup_res);
1665 ocfs2_free_dir_lookup_result(&old_entry_lookup);
1666 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1667 ocfs2_free_dir_lookup_result(&orphan_insert);
1668 ocfs2_free_dir_lookup_result(&target_insert);
1669
1670 brelse(newfe_bh);
1671 brelse(old_inode_bh);
1672 brelse(old_dir_bh);
1673 brelse(new_dir_bh);
1674
1675 if (status)
1676 mlog_errno(status);
1677
1678 return status;
1679 }
1680
1681 /*
1682 * we expect i_size = strlen(symname). Copy symname into the file
1683 * data, including the null terminator.
1684 */
1685 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1686 handle_t *handle,
1687 struct inode *inode,
1688 const char *symname)
1689 {
1690 struct buffer_head **bhs = NULL;
1691 const char *c;
1692 struct super_block *sb = osb->sb;
1693 u64 p_blkno, p_blocks;
1694 int virtual, blocks, status, i, bytes_left;
1695
1696 bytes_left = i_size_read(inode) + 1;
1697 /* we can't trust i_blocks because we're actually going to
1698 * write i_size + 1 bytes. */
1699 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1700
1701 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1702 i_size_read(inode), blocks);
1703
1704 /* Sanity check -- make sure we're going to fit. */
1705 if (bytes_left >
1706 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1707 status = -EIO;
1708 mlog_errno(status);
1709 goto bail;
1710 }
1711
1712 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1713 if (!bhs) {
1714 status = -ENOMEM;
1715 mlog_errno(status);
1716 goto bail;
1717 }
1718
1719 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1720 NULL);
1721 if (status < 0) {
1722 mlog_errno(status);
1723 goto bail;
1724 }
1725
1726 /* links can never be larger than one cluster so we know this
1727 * is all going to be contiguous, but do a sanity check
1728 * anyway. */
1729 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1730 status = -EIO;
1731 mlog_errno(status);
1732 goto bail;
1733 }
1734
1735 virtual = 0;
1736 while(bytes_left > 0) {
1737 c = &symname[virtual * sb->s_blocksize];
1738
1739 bhs[virtual] = sb_getblk(sb, p_blkno);
1740 if (!bhs[virtual]) {
1741 status = -ENOMEM;
1742 mlog_errno(status);
1743 goto bail;
1744 }
1745 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1746 bhs[virtual]);
1747
1748 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1749 bhs[virtual],
1750 OCFS2_JOURNAL_ACCESS_CREATE);
1751 if (status < 0) {
1752 mlog_errno(status);
1753 goto bail;
1754 }
1755
1756 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1757
1758 memcpy(bhs[virtual]->b_data, c,
1759 (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1760 bytes_left);
1761
1762 ocfs2_journal_dirty(handle, bhs[virtual]);
1763
1764 virtual++;
1765 p_blkno++;
1766 bytes_left -= sb->s_blocksize;
1767 }
1768
1769 status = 0;
1770 bail:
1771
1772 if (bhs) {
1773 for(i = 0; i < blocks; i++)
1774 brelse(bhs[i]);
1775 kfree(bhs);
1776 }
1777
1778 if (status)
1779 mlog_errno(status);
1780 return status;
1781 }
1782
1783 static int ocfs2_symlink(struct inode *dir,
1784 struct dentry *dentry,
1785 const char *symname)
1786 {
1787 int status, l, credits;
1788 u64 newsize;
1789 struct ocfs2_super *osb = NULL;
1790 struct inode *inode = NULL;
1791 struct super_block *sb;
1792 struct buffer_head *new_fe_bh = NULL;
1793 struct buffer_head *parent_fe_bh = NULL;
1794 struct ocfs2_dinode *fe = NULL;
1795 struct ocfs2_dinode *dirfe;
1796 handle_t *handle = NULL;
1797 struct ocfs2_alloc_context *inode_ac = NULL;
1798 struct ocfs2_alloc_context *data_ac = NULL;
1799 struct ocfs2_alloc_context *xattr_ac = NULL;
1800 int want_clusters = 0;
1801 int xattr_credits = 0;
1802 struct ocfs2_security_xattr_info si = {
1803 .enable = 1,
1804 };
1805 int did_quota = 0, did_quota_inode = 0;
1806 struct ocfs2_dir_lookup_result lookup = { NULL, };
1807 sigset_t oldset;
1808 int did_block_signals = 0;
1809 struct ocfs2_dentry_lock *dl = NULL;
1810
1811 trace_ocfs2_symlink_begin(dir, dentry, symname,
1812 dentry->d_name.len, dentry->d_name.name);
1813
1814 status = dquot_initialize(dir);
1815 if (status) {
1816 mlog_errno(status);
1817 goto bail;
1818 }
1819
1820 sb = dir->i_sb;
1821 osb = OCFS2_SB(sb);
1822
1823 l = strlen(symname) + 1;
1824
1825 credits = ocfs2_calc_symlink_credits(sb);
1826
1827 /* lock the parent directory */
1828 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1829 if (status < 0) {
1830 if (status != -ENOENT)
1831 mlog_errno(status);
1832 return status;
1833 }
1834
1835 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1836 if (!ocfs2_read_links_count(dirfe)) {
1837 /* can't make a file in a deleted directory. */
1838 status = -ENOENT;
1839 goto bail;
1840 }
1841
1842 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1843 dentry->d_name.len);
1844 if (status)
1845 goto bail;
1846
1847 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1848 dentry->d_name.name,
1849 dentry->d_name.len, &lookup);
1850 if (status < 0) {
1851 mlog_errno(status);
1852 goto bail;
1853 }
1854
1855 status = ocfs2_reserve_new_inode(osb, &inode_ac);
1856 if (status < 0) {
1857 if (status != -ENOSPC)
1858 mlog_errno(status);
1859 goto bail;
1860 }
1861
1862 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1863 if (IS_ERR(inode)) {
1864 status = PTR_ERR(inode);
1865 inode = NULL;
1866 mlog_errno(status);
1867 goto bail;
1868 }
1869
1870 /* get security xattr */
1871 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1872 if (status) {
1873 if (status == -EOPNOTSUPP)
1874 si.enable = 0;
1875 else {
1876 mlog_errno(status);
1877 goto bail;
1878 }
1879 }
1880
1881 /* calculate meta data/clusters for setting security xattr */
1882 if (si.enable) {
1883 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1884 &xattr_credits, &xattr_ac);
1885 if (status < 0) {
1886 mlog_errno(status);
1887 goto bail;
1888 }
1889 }
1890
1891 /* don't reserve bitmap space for fast symlinks. */
1892 if (l > ocfs2_fast_symlink_chars(sb))
1893 want_clusters += 1;
1894
1895 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1896 if (status < 0) {
1897 if (status != -ENOSPC)
1898 mlog_errno(status);
1899 goto bail;
1900 }
1901
1902 handle = ocfs2_start_trans(osb, credits + xattr_credits);
1903 if (IS_ERR(handle)) {
1904 status = PTR_ERR(handle);
1905 handle = NULL;
1906 mlog_errno(status);
1907 goto bail;
1908 }
1909
1910 /* Starting to change things, restart is no longer possible. */
1911 ocfs2_block_signals(&oldset);
1912 did_block_signals = 1;
1913
1914 status = dquot_alloc_inode(inode);
1915 if (status)
1916 goto bail;
1917 did_quota_inode = 1;
1918
1919 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1920 dentry->d_name.name,
1921 (unsigned long long)OCFS2_I(dir)->ip_blkno,
1922 inode->i_mode);
1923
1924 status = ocfs2_mknod_locked(osb, dir, inode,
1925 0, &new_fe_bh, parent_fe_bh, handle,
1926 inode_ac);
1927 if (status < 0) {
1928 mlog_errno(status);
1929 goto bail;
1930 }
1931
1932 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1933 inode->i_rdev = 0;
1934 newsize = l - 1;
1935 inode->i_op = &ocfs2_symlink_inode_operations;
1936 if (l > ocfs2_fast_symlink_chars(sb)) {
1937 u32 offset = 0;
1938
1939 status = dquot_alloc_space_nodirty(inode,
1940 ocfs2_clusters_to_bytes(osb->sb, 1));
1941 if (status)
1942 goto bail;
1943 did_quota = 1;
1944 inode->i_mapping->a_ops = &ocfs2_aops;
1945 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1946 new_fe_bh,
1947 handle, data_ac, NULL,
1948 NULL);
1949 if (status < 0) {
1950 if (status != -ENOSPC && status != -EINTR) {
1951 mlog(ML_ERROR,
1952 "Failed to extend file to %llu\n",
1953 (unsigned long long)newsize);
1954 mlog_errno(status);
1955 status = -ENOSPC;
1956 }
1957 goto bail;
1958 }
1959 i_size_write(inode, newsize);
1960 inode->i_blocks = ocfs2_inode_sector_count(inode);
1961 } else {
1962 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1963 memcpy((char *) fe->id2.i_symlink, symname, l);
1964 i_size_write(inode, newsize);
1965 inode->i_blocks = 0;
1966 }
1967
1968 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1969 if (status < 0) {
1970 mlog_errno(status);
1971 goto bail;
1972 }
1973
1974 if (!ocfs2_inode_is_fast_symlink(inode)) {
1975 status = ocfs2_create_symlink_data(osb, handle, inode,
1976 symname);
1977 if (status < 0) {
1978 mlog_errno(status);
1979 goto bail;
1980 }
1981 }
1982
1983 if (si.enable) {
1984 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1985 xattr_ac, data_ac);
1986 if (status < 0) {
1987 mlog_errno(status);
1988 goto bail;
1989 }
1990 }
1991
1992 /*
1993 * Do this before adding the entry to the directory. We add
1994 * also set d_op after success so that ->d_iput() will cleanup
1995 * the dentry lock even if ocfs2_add_entry() fails below.
1996 */
1997 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1998 if (status) {
1999 mlog_errno(status);
2000 goto bail;
2001 }
2002
2003 dl = dentry->d_fsdata;
2004
2005 status = ocfs2_add_entry(handle, dentry, inode,
2006 le64_to_cpu(fe->i_blkno), parent_fe_bh,
2007 &lookup);
2008 if (status < 0) {
2009 mlog_errno(status);
2010 goto bail;
2011 }
2012
2013 insert_inode_hash(inode);
2014 d_instantiate(dentry, inode);
2015 bail:
2016 if (status < 0 && did_quota)
2017 dquot_free_space_nodirty(inode,
2018 ocfs2_clusters_to_bytes(osb->sb, 1));
2019 if (status < 0 && did_quota_inode)
2020 dquot_free_inode(inode);
2021 if (handle)
2022 ocfs2_commit_trans(osb, handle);
2023
2024 ocfs2_inode_unlock(dir, 1);
2025 if (did_block_signals)
2026 ocfs2_unblock_signals(&oldset);
2027
2028 brelse(new_fe_bh);
2029 brelse(parent_fe_bh);
2030 kfree(si.value);
2031 ocfs2_free_dir_lookup_result(&lookup);
2032 if (inode_ac)
2033 ocfs2_free_alloc_context(inode_ac);
2034 if (data_ac)
2035 ocfs2_free_alloc_context(data_ac);
2036 if (xattr_ac)
2037 ocfs2_free_alloc_context(xattr_ac);
2038 if ((status < 0) && inode) {
2039 if (dl)
2040 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2041
2042 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
2043 clear_nlink(inode);
2044 iput(inode);
2045 }
2046
2047 if (status)
2048 mlog_errno(status);
2049
2050 return status;
2051 }
2052
2053 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2054 {
2055 int status, namelen;
2056
2057 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2058 (long long)blkno);
2059 if (namelen <= 0) {
2060 if (namelen)
2061 status = namelen;
2062 else
2063 status = -EINVAL;
2064 mlog_errno(status);
2065 goto bail;
2066 }
2067 if (namelen != OCFS2_ORPHAN_NAMELEN) {
2068 status = -EINVAL;
2069 mlog_errno(status);
2070 goto bail;
2071 }
2072
2073 trace_ocfs2_blkno_stringify(blkno, name, namelen);
2074
2075 status = 0;
2076 bail:
2077 if (status < 0)
2078 mlog_errno(status);
2079 return status;
2080 }
2081
2082 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2083 struct inode **ret_orphan_dir,
2084 struct buffer_head **ret_orphan_dir_bh)
2085 {
2086 struct inode *orphan_dir_inode;
2087 struct buffer_head *orphan_dir_bh = NULL;
2088 int ret = 0;
2089
2090 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2091 ORPHAN_DIR_SYSTEM_INODE,
2092 osb->slot_num);
2093 if (!orphan_dir_inode) {
2094 ret = -ENOENT;
2095 mlog_errno(ret);
2096 return ret;
2097 }
2098
2099 mutex_lock(&orphan_dir_inode->i_mutex);
2100
2101 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2102 if (ret < 0) {
2103 mutex_unlock(&orphan_dir_inode->i_mutex);
2104 iput(orphan_dir_inode);
2105
2106 mlog_errno(ret);
2107 return ret;
2108 }
2109
2110 *ret_orphan_dir = orphan_dir_inode;
2111 *ret_orphan_dir_bh = orphan_dir_bh;
2112
2113 return 0;
2114 }
2115
2116 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2117 struct buffer_head *orphan_dir_bh,
2118 u64 blkno,
2119 char *name,
2120 struct ocfs2_dir_lookup_result *lookup,
2121 bool dio)
2122 {
2123 int ret;
2124 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2125 int namelen = dio ?
2126 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2127 OCFS2_ORPHAN_NAMELEN;
2128
2129 if (dio) {
2130 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2131 OCFS2_DIO_ORPHAN_PREFIX);
2132 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2133 ret = -EINVAL;
2134 mlog_errno(ret);
2135 return ret;
2136 }
2137
2138 ret = ocfs2_blkno_stringify(blkno,
2139 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2140 } else
2141 ret = ocfs2_blkno_stringify(blkno, name);
2142 if (ret < 0) {
2143 mlog_errno(ret);
2144 return ret;
2145 }
2146
2147 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2148 orphan_dir_bh, name,
2149 namelen, lookup);
2150 if (ret < 0) {
2151 mlog_errno(ret);
2152 return ret;
2153 }
2154
2155 return 0;
2156 }
2157
2158 /**
2159 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2160 * insertion of an orphan.
2161 * @osb: ocfs2 file system
2162 * @ret_orphan_dir: Orphan dir inode - returned locked!
2163 * @blkno: Actual block number of the inode to be inserted into orphan dir.
2164 * @lookup: dir lookup result, to be passed back into functions like
2165 * ocfs2_orphan_add
2166 *
2167 * Returns zero on success and the ret_orphan_dir, name and lookup
2168 * fields will be populated.
2169 *
2170 * Returns non-zero on failure.
2171 */
2172 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2173 struct inode **ret_orphan_dir,
2174 u64 blkno,
2175 char *name,
2176 struct ocfs2_dir_lookup_result *lookup,
2177 bool dio)
2178 {
2179 struct inode *orphan_dir_inode = NULL;
2180 struct buffer_head *orphan_dir_bh = NULL;
2181 int ret = 0;
2182
2183 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2184 &orphan_dir_bh);
2185 if (ret < 0) {
2186 mlog_errno(ret);
2187 return ret;
2188 }
2189
2190 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2191 blkno, name, lookup, dio);
2192 if (ret < 0) {
2193 mlog_errno(ret);
2194 goto out;
2195 }
2196
2197 *ret_orphan_dir = orphan_dir_inode;
2198
2199 out:
2200 brelse(orphan_dir_bh);
2201
2202 if (ret) {
2203 ocfs2_inode_unlock(orphan_dir_inode, 1);
2204 mutex_unlock(&orphan_dir_inode->i_mutex);
2205 iput(orphan_dir_inode);
2206 }
2207
2208 if (ret)
2209 mlog_errno(ret);
2210 return ret;
2211 }
2212
2213 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2214 handle_t *handle,
2215 struct inode *inode,
2216 struct buffer_head *fe_bh,
2217 char *name,
2218 struct ocfs2_dir_lookup_result *lookup,
2219 struct inode *orphan_dir_inode,
2220 bool dio)
2221 {
2222 struct buffer_head *orphan_dir_bh = NULL;
2223 int status = 0;
2224 struct ocfs2_dinode *orphan_fe;
2225 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2226 int namelen = dio ?
2227 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2228 OCFS2_ORPHAN_NAMELEN;
2229
2230 trace_ocfs2_orphan_add_begin(
2231 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2232
2233 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2234 if (status < 0) {
2235 mlog_errno(status);
2236 goto leave;
2237 }
2238
2239 status = ocfs2_journal_access_di(handle,
2240 INODE_CACHE(orphan_dir_inode),
2241 orphan_dir_bh,
2242 OCFS2_JOURNAL_ACCESS_WRITE);
2243 if (status < 0) {
2244 mlog_errno(status);
2245 goto leave;
2246 }
2247
2248 /*
2249 * We're going to journal the change of i_flags and i_orphaned_slot.
2250 * It's safe anyway, though some callers may duplicate the journaling.
2251 * Journaling within the func just make the logic look more
2252 * straightforward.
2253 */
2254 status = ocfs2_journal_access_di(handle,
2255 INODE_CACHE(inode),
2256 fe_bh,
2257 OCFS2_JOURNAL_ACCESS_WRITE);
2258 if (status < 0) {
2259 mlog_errno(status);
2260 goto leave;
2261 }
2262
2263 /* we're a cluster, and nlink can change on disk from
2264 * underneath us... */
2265 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2266 if (S_ISDIR(inode->i_mode))
2267 ocfs2_add_links_count(orphan_fe, 1);
2268 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2269 ocfs2_journal_dirty(handle, orphan_dir_bh);
2270
2271 status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2272 namelen, inode,
2273 OCFS2_I(inode)->ip_blkno,
2274 orphan_dir_bh, lookup);
2275 if (status < 0) {
2276 mlog_errno(status);
2277 goto rollback;
2278 }
2279
2280 if (dio) {
2281 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan
2282 * slot.
2283 */
2284 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2285 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num);
2286 } else {
2287 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2288 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2289
2290 /* Record which orphan dir our inode now resides
2291 * in. delete_inode will use this to determine which orphan
2292 * dir to lock. */
2293 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2294 }
2295
2296 ocfs2_journal_dirty(handle, fe_bh);
2297
2298 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2299 osb->slot_num);
2300
2301 rollback:
2302 if (status < 0) {
2303 if (S_ISDIR(inode->i_mode))
2304 ocfs2_add_links_count(orphan_fe, -1);
2305 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2306 }
2307
2308 leave:
2309 brelse(orphan_dir_bh);
2310
2311 return status;
2312 }
2313
2314 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2315 int ocfs2_orphan_del(struct ocfs2_super *osb,
2316 handle_t *handle,
2317 struct inode *orphan_dir_inode,
2318 struct inode *inode,
2319 struct buffer_head *orphan_dir_bh,
2320 bool dio)
2321 {
2322 const int namelen = OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN;
2323 char name[namelen + 1];
2324 struct ocfs2_dinode *orphan_fe;
2325 int status = 0;
2326 struct ocfs2_dir_lookup_result lookup = { NULL, };
2327
2328 if (dio) {
2329 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2330 OCFS2_DIO_ORPHAN_PREFIX);
2331 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2332 status = -EINVAL;
2333 mlog_errno(status);
2334 return status;
2335 }
2336
2337 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno,
2338 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2339 } else
2340 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2341 if (status < 0) {
2342 mlog_errno(status);
2343 goto leave;
2344 }
2345
2346 trace_ocfs2_orphan_del(
2347 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2348 name, strlen(name));
2349
2350 /* find it's spot in the orphan directory */
2351 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode,
2352 &lookup);
2353 if (status) {
2354 mlog_errno(status);
2355 goto leave;
2356 }
2357
2358 /* remove it from the orphan directory */
2359 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2360 if (status < 0) {
2361 mlog_errno(status);
2362 goto leave;
2363 }
2364
2365 status = ocfs2_journal_access_di(handle,
2366 INODE_CACHE(orphan_dir_inode),
2367 orphan_dir_bh,
2368 OCFS2_JOURNAL_ACCESS_WRITE);
2369 if (status < 0) {
2370 mlog_errno(status);
2371 goto leave;
2372 }
2373
2374 /* do the i_nlink dance! :) */
2375 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2376 if (S_ISDIR(inode->i_mode))
2377 ocfs2_add_links_count(orphan_fe, -1);
2378 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2379 ocfs2_journal_dirty(handle, orphan_dir_bh);
2380
2381 leave:
2382 ocfs2_free_dir_lookup_result(&lookup);
2383
2384 if (status)
2385 mlog_errno(status);
2386 return status;
2387 }
2388
2389 /**
2390 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2391 * allocated file. This is different from the typical 'add to orphan dir'
2392 * operation in that the inode does not yet exist. This is a problem because
2393 * the orphan dir stringifies the inode block number to come up with it's
2394 * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2395 * problem. This function works around it by calling deeper into the orphan
2396 * and suballoc code than other callers. Use this only by necessity.
2397 * @dir: The directory which this inode will ultimately wind up under - not the
2398 * orphan dir!
2399 * @dir_bh: buffer_head the @dir inode block
2400 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2401 * with the string to be used for orphan dirent. Pass back to the orphan dir
2402 * code.
2403 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2404 * dir code.
2405 * @ret_di_blkno: block number where the new inode will be allocated.
2406 * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2407 * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2408 *
2409 * Returns zero on success and the ret_orphan_dir, name and lookup
2410 * fields will be populated.
2411 *
2412 * Returns non-zero on failure.
2413 */
2414 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2415 struct buffer_head *dir_bh,
2416 char *orphan_name,
2417 struct inode **ret_orphan_dir,
2418 u64 *ret_di_blkno,
2419 struct ocfs2_dir_lookup_result *orphan_insert,
2420 struct ocfs2_alloc_context **ret_inode_ac)
2421 {
2422 int ret;
2423 u64 di_blkno;
2424 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2425 struct inode *orphan_dir = NULL;
2426 struct buffer_head *orphan_dir_bh = NULL;
2427 struct ocfs2_alloc_context *inode_ac = NULL;
2428
2429 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2430 if (ret < 0) {
2431 mlog_errno(ret);
2432 return ret;
2433 }
2434
2435 /* reserve an inode spot */
2436 ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2437 if (ret < 0) {
2438 if (ret != -ENOSPC)
2439 mlog_errno(ret);
2440 goto out;
2441 }
2442
2443 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2444 &di_blkno);
2445 if (ret) {
2446 mlog_errno(ret);
2447 goto out;
2448 }
2449
2450 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2451 di_blkno, orphan_name, orphan_insert,
2452 false);
2453 if (ret < 0) {
2454 mlog_errno(ret);
2455 goto out;
2456 }
2457
2458 out:
2459 if (ret == 0) {
2460 *ret_orphan_dir = orphan_dir;
2461 *ret_di_blkno = di_blkno;
2462 *ret_inode_ac = inode_ac;
2463 /*
2464 * orphan_name and orphan_insert are already up to
2465 * date via prepare_orphan_dir
2466 */
2467 } else {
2468 /* Unroll reserve_new_inode* */
2469 if (inode_ac)
2470 ocfs2_free_alloc_context(inode_ac);
2471
2472 /* Unroll orphan dir locking */
2473 mutex_unlock(&orphan_dir->i_mutex);
2474 ocfs2_inode_unlock(orphan_dir, 1);
2475 iput(orphan_dir);
2476 }
2477
2478 brelse(orphan_dir_bh);
2479
2480 return ret;
2481 }
2482
2483 int ocfs2_create_inode_in_orphan(struct inode *dir,
2484 int mode,
2485 struct inode **new_inode)
2486 {
2487 int status, did_quota_inode = 0;
2488 struct inode *inode = NULL;
2489 struct inode *orphan_dir = NULL;
2490 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2491 struct ocfs2_dinode *di = NULL;
2492 handle_t *handle = NULL;
2493 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2494 struct buffer_head *parent_di_bh = NULL;
2495 struct buffer_head *new_di_bh = NULL;
2496 struct ocfs2_alloc_context *inode_ac = NULL;
2497 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2498 u64 uninitialized_var(di_blkno), suballoc_loc;
2499 u16 suballoc_bit;
2500
2501 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2502 if (status < 0) {
2503 if (status != -ENOENT)
2504 mlog_errno(status);
2505 return status;
2506 }
2507
2508 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2509 orphan_name, &orphan_dir,
2510 &di_blkno, &orphan_insert, &inode_ac);
2511 if (status < 0) {
2512 if (status != -ENOSPC)
2513 mlog_errno(status);
2514 goto leave;
2515 }
2516
2517 inode = ocfs2_get_init_inode(dir, mode);
2518 if (IS_ERR(inode)) {
2519 status = PTR_ERR(inode);
2520 inode = NULL;
2521 mlog_errno(status);
2522 goto leave;
2523 }
2524
2525 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2526 if (IS_ERR(handle)) {
2527 status = PTR_ERR(handle);
2528 handle = NULL;
2529 mlog_errno(status);
2530 goto leave;
2531 }
2532
2533 status = dquot_alloc_inode(inode);
2534 if (status)
2535 goto leave;
2536 did_quota_inode = 1;
2537
2538 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2539 &suballoc_loc,
2540 &suballoc_bit, di_blkno);
2541 if (status < 0) {
2542 mlog_errno(status);
2543 goto leave;
2544 }
2545
2546 clear_nlink(inode);
2547 /* do the real work now. */
2548 status = __ocfs2_mknod_locked(dir, inode,
2549 0, &new_di_bh, parent_di_bh, handle,
2550 inode_ac, di_blkno, suballoc_loc,
2551 suballoc_bit);
2552 if (status < 0) {
2553 mlog_errno(status);
2554 goto leave;
2555 }
2556
2557 di = (struct ocfs2_dinode *)new_di_bh->b_data;
2558 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2559 &orphan_insert, orphan_dir, false);
2560 if (status < 0) {
2561 mlog_errno(status);
2562 goto leave;
2563 }
2564
2565 /* get open lock so that only nodes can't remove it from orphan dir. */
2566 status = ocfs2_open_lock(inode);
2567 if (status < 0)
2568 mlog_errno(status);
2569
2570 insert_inode_hash(inode);
2571 leave:
2572 if (status < 0 && did_quota_inode)
2573 dquot_free_inode(inode);
2574 if (handle)
2575 ocfs2_commit_trans(osb, handle);
2576
2577 if (orphan_dir) {
2578 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2579 ocfs2_inode_unlock(orphan_dir, 1);
2580 mutex_unlock(&orphan_dir->i_mutex);
2581 iput(orphan_dir);
2582 }
2583
2584 if ((status < 0) && inode) {
2585 clear_nlink(inode);
2586 iput(inode);
2587 }
2588
2589 if (inode_ac)
2590 ocfs2_free_alloc_context(inode_ac);
2591
2592 brelse(new_di_bh);
2593
2594 if (!status)
2595 *new_inode = inode;
2596
2597 ocfs2_free_dir_lookup_result(&orphan_insert);
2598
2599 ocfs2_inode_unlock(dir, 1);
2600 brelse(parent_di_bh);
2601 return status;
2602 }
2603
2604 static int ocfs2_dio_orphan_recovered(struct inode *inode)
2605 {
2606 int ret;
2607 struct buffer_head *di_bh = NULL;
2608 struct ocfs2_dinode *di = NULL;
2609
2610 ret = ocfs2_inode_lock(inode, &di_bh, 1);
2611 if (ret < 0) {
2612 mlog_errno(ret);
2613 return 0;
2614 }
2615
2616 di = (struct ocfs2_dinode *) di_bh->b_data;
2617 ret = !(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL));
2618 ocfs2_inode_unlock(inode, 1);
2619 brelse(di_bh);
2620
2621 return ret;
2622 }
2623
2624 #define OCFS2_DIO_ORPHANED_FL_CHECK_INTERVAL 10000
2625 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
2626 struct inode *inode)
2627 {
2628 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2629 struct inode *orphan_dir_inode = NULL;
2630 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2631 struct buffer_head *di_bh = NULL;
2632 int status = 0;
2633 handle_t *handle = NULL;
2634 struct ocfs2_dinode *di = NULL;
2635
2636 restart:
2637 status = ocfs2_inode_lock(inode, &di_bh, 1);
2638 if (status < 0) {
2639 mlog_errno(status);
2640 goto bail;
2641 }
2642
2643 di = (struct ocfs2_dinode *) di_bh->b_data;
2644 /*
2645 * Another append dio crashed?
2646 * If so, wait for recovery first.
2647 */
2648 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
2649 ocfs2_inode_unlock(inode, 1);
2650 brelse(di_bh);
2651 wait_event_interruptible_timeout(OCFS2_I(inode)->append_dio_wq,
2652 ocfs2_dio_orphan_recovered(inode),
2653 msecs_to_jiffies(OCFS2_DIO_ORPHANED_FL_CHECK_INTERVAL));
2654 goto restart;
2655 }
2656
2657 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
2658 OCFS2_I(inode)->ip_blkno,
2659 orphan_name,
2660 &orphan_insert,
2661 true);
2662 if (status < 0) {
2663 mlog_errno(status);
2664 goto bail_unlock_inode;
2665 }
2666
2667 handle = ocfs2_start_trans(osb,
2668 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS);
2669 if (IS_ERR(handle)) {
2670 status = PTR_ERR(handle);
2671 goto bail_unlock_orphan;
2672 }
2673
2674 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
2675 &orphan_insert, orphan_dir_inode, true);
2676 if (status)
2677 mlog_errno(status);
2678
2679 ocfs2_commit_trans(osb, handle);
2680
2681 bail_unlock_orphan:
2682 ocfs2_inode_unlock(orphan_dir_inode, 1);
2683 mutex_unlock(&orphan_dir_inode->i_mutex);
2684 iput(orphan_dir_inode);
2685
2686 ocfs2_free_dir_lookup_result(&orphan_insert);
2687
2688 bail_unlock_inode:
2689 ocfs2_inode_unlock(inode, 1);
2690 brelse(di_bh);
2691
2692 bail:
2693 return status;
2694 }
2695
2696 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
2697 struct inode *inode, struct buffer_head *di_bh,
2698 int update_isize, loff_t end)
2699 {
2700 struct inode *orphan_dir_inode = NULL;
2701 struct buffer_head *orphan_dir_bh = NULL;
2702 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2703 handle_t *handle = NULL;
2704 int status = 0;
2705
2706 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2707 ORPHAN_DIR_SYSTEM_INODE,
2708 le16_to_cpu(di->i_dio_orphaned_slot));
2709 if (!orphan_dir_inode) {
2710 status = -ENOENT;
2711 mlog_errno(status);
2712 goto bail;
2713 }
2714
2715 mutex_lock(&orphan_dir_inode->i_mutex);
2716 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2717 if (status < 0) {
2718 mutex_unlock(&orphan_dir_inode->i_mutex);
2719 iput(orphan_dir_inode);
2720 mlog_errno(status);
2721 goto bail;
2722 }
2723
2724 handle = ocfs2_start_trans(osb,
2725 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS);
2726 if (IS_ERR(handle)) {
2727 status = PTR_ERR(handle);
2728 goto bail_unlock_orphan;
2729 }
2730
2731 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)));
2732
2733 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
2734 inode, orphan_dir_bh, true);
2735 if (status < 0) {
2736 mlog_errno(status);
2737 goto bail_commit;
2738 }
2739
2740 status = ocfs2_journal_access_di(handle,
2741 INODE_CACHE(inode),
2742 di_bh,
2743 OCFS2_JOURNAL_ACCESS_WRITE);
2744 if (status < 0) {
2745 mlog_errno(status);
2746 goto bail_commit;
2747 }
2748
2749 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2750 di->i_dio_orphaned_slot = 0;
2751
2752 if (update_isize) {
2753 status = ocfs2_set_inode_size(handle, inode, di_bh, end);
2754 if (status)
2755 mlog_errno(status);
2756 } else
2757 ocfs2_journal_dirty(handle, di_bh);
2758
2759 bail_commit:
2760 ocfs2_commit_trans(osb, handle);
2761
2762 bail_unlock_orphan:
2763 ocfs2_inode_unlock(orphan_dir_inode, 1);
2764 mutex_unlock(&orphan_dir_inode->i_mutex);
2765 brelse(orphan_dir_bh);
2766 iput(orphan_dir_inode);
2767
2768 bail:
2769 return status;
2770 }
2771
2772 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2773 struct inode *inode,
2774 struct dentry *dentry)
2775 {
2776 int status = 0;
2777 struct buffer_head *parent_di_bh = NULL;
2778 handle_t *handle = NULL;
2779 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2780 struct ocfs2_dinode *dir_di, *di;
2781 struct inode *orphan_dir_inode = NULL;
2782 struct buffer_head *orphan_dir_bh = NULL;
2783 struct buffer_head *di_bh = NULL;
2784 struct ocfs2_dir_lookup_result lookup = { NULL, };
2785
2786 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2787 dentry->d_name.len, dentry->d_name.name,
2788 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2789 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2790
2791 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2792 if (status < 0) {
2793 if (status != -ENOENT)
2794 mlog_errno(status);
2795 return status;
2796 }
2797
2798 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2799 if (!dir_di->i_links_count) {
2800 /* can't make a file in a deleted directory. */
2801 status = -ENOENT;
2802 goto leave;
2803 }
2804
2805 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2806 dentry->d_name.len);
2807 if (status)
2808 goto leave;
2809
2810 /* get a spot inside the dir. */
2811 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2812 dentry->d_name.name,
2813 dentry->d_name.len, &lookup);
2814 if (status < 0) {
2815 mlog_errno(status);
2816 goto leave;
2817 }
2818
2819 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2820 ORPHAN_DIR_SYSTEM_INODE,
2821 osb->slot_num);
2822 if (!orphan_dir_inode) {
2823 status = -ENOENT;
2824 mlog_errno(status);
2825 goto leave;
2826 }
2827
2828 mutex_lock(&orphan_dir_inode->i_mutex);
2829
2830 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2831 if (status < 0) {
2832 mlog_errno(status);
2833 mutex_unlock(&orphan_dir_inode->i_mutex);
2834 iput(orphan_dir_inode);
2835 goto leave;
2836 }
2837
2838 status = ocfs2_read_inode_block(inode, &di_bh);
2839 if (status < 0) {
2840 mlog_errno(status);
2841 goto orphan_unlock;
2842 }
2843
2844 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2845 if (IS_ERR(handle)) {
2846 status = PTR_ERR(handle);
2847 handle = NULL;
2848 mlog_errno(status);
2849 goto orphan_unlock;
2850 }
2851
2852 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2853 di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2854 if (status < 0) {
2855 mlog_errno(status);
2856 goto out_commit;
2857 }
2858
2859 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2860 orphan_dir_bh, false);
2861 if (status < 0) {
2862 mlog_errno(status);
2863 goto out_commit;
2864 }
2865
2866 di = (struct ocfs2_dinode *)di_bh->b_data;
2867 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2868 di->i_orphaned_slot = 0;
2869 set_nlink(inode, 1);
2870 ocfs2_set_links_count(di, inode->i_nlink);
2871 ocfs2_update_inode_fsync_trans(handle, inode, 1);
2872 ocfs2_journal_dirty(handle, di_bh);
2873
2874 status = ocfs2_add_entry(handle, dentry, inode,
2875 OCFS2_I(inode)->ip_blkno, parent_di_bh,
2876 &lookup);
2877 if (status < 0) {
2878 mlog_errno(status);
2879 goto out_commit;
2880 }
2881
2882 status = ocfs2_dentry_attach_lock(dentry, inode,
2883 OCFS2_I(dir)->ip_blkno);
2884 if (status) {
2885 mlog_errno(status);
2886 goto out_commit;
2887 }
2888
2889 d_instantiate(dentry, inode);
2890 status = 0;
2891 out_commit:
2892 ocfs2_commit_trans(osb, handle);
2893 orphan_unlock:
2894 ocfs2_inode_unlock(orphan_dir_inode, 1);
2895 mutex_unlock(&orphan_dir_inode->i_mutex);
2896 iput(orphan_dir_inode);
2897 leave:
2898
2899 ocfs2_inode_unlock(dir, 1);
2900
2901 brelse(di_bh);
2902 brelse(parent_di_bh);
2903 brelse(orphan_dir_bh);
2904
2905 ocfs2_free_dir_lookup_result(&lookup);
2906
2907 if (status)
2908 mlog_errno(status);
2909
2910 return status;
2911 }
2912
2913 const struct inode_operations ocfs2_dir_iops = {
2914 .create = ocfs2_create,
2915 .lookup = ocfs2_lookup,
2916 .link = ocfs2_link,
2917 .unlink = ocfs2_unlink,
2918 .rmdir = ocfs2_unlink,
2919 .symlink = ocfs2_symlink,
2920 .mkdir = ocfs2_mkdir,
2921 .mknod = ocfs2_mknod,
2922 .rename = ocfs2_rename,
2923 .setattr = ocfs2_setattr,
2924 .getattr = ocfs2_getattr,
2925 .permission = ocfs2_permission,
2926 .setxattr = generic_setxattr,
2927 .getxattr = generic_getxattr,
2928 .listxattr = ocfs2_listxattr,
2929 .removexattr = generic_removexattr,
2930 .fiemap = ocfs2_fiemap,
2931 .get_acl = ocfs2_iop_get_acl,
2932 .set_acl = ocfs2_iop_set_acl,
2933 };
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