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[people/ms/linux.git] / fs / ocfs2 / namei.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* -*- mode: c; c-basic-offset: 8; -*-
3 * vim: noexpandtab sw=8 ts=8 sts=0:
4 *
5 * namei.c
6 *
7 * Create and rename file, directory, symlinks
8 *
9 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
10 *
11 * Portions of this code from linux/fs/ext3/dir.c
12 *
13 * Copyright (C) 1992, 1993, 1994, 1995
14 * Remy Card (card@masi.ibp.fr)
15 * Laboratoire MASI - Institut Blaise pascal
16 * Universite Pierre et Marie Curie (Paris VI)
17 *
18 * from
19 *
20 * linux/fs/minix/dir.c
21 *
22 * Copyright (C) 1991, 1992 Linux Torvalds
23 */
24
25 #include <linux/fs.h>
26 #include <linux/types.h>
27 #include <linux/slab.h>
28 #include <linux/highmem.h>
29 #include <linux/quotaops.h>
30 #include <linux/iversion.h>
31
32 #include <cluster/masklog.h>
33
34 #include "ocfs2.h"
35
36 #include "alloc.h"
37 #include "dcache.h"
38 #include "dir.h"
39 #include "dlmglue.h"
40 #include "extent_map.h"
41 #include "file.h"
42 #include "inode.h"
43 #include "journal.h"
44 #include "namei.h"
45 #include "suballoc.h"
46 #include "super.h"
47 #include "symlink.h"
48 #include "sysfile.h"
49 #include "uptodate.h"
50 #include "xattr.h"
51 #include "acl.h"
52 #include "ocfs2_trace.h"
53
54 #include "buffer_head_io.h"
55
56 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
57 struct inode *dir,
58 struct inode *inode,
59 dev_t dev,
60 struct buffer_head **new_fe_bh,
61 struct buffer_head *parent_fe_bh,
62 handle_t *handle,
63 struct ocfs2_alloc_context *inode_ac);
64
65 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
66 struct inode **ret_orphan_dir,
67 u64 blkno,
68 char *name,
69 struct ocfs2_dir_lookup_result *lookup,
70 bool dio);
71
72 static int ocfs2_orphan_add(struct ocfs2_super *osb,
73 handle_t *handle,
74 struct inode *inode,
75 struct buffer_head *fe_bh,
76 char *name,
77 struct ocfs2_dir_lookup_result *lookup,
78 struct inode *orphan_dir_inode,
79 bool dio);
80
81 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
82 handle_t *handle,
83 struct inode *inode,
84 const char *symname);
85
86 static int ocfs2_double_lock(struct ocfs2_super *osb,
87 struct buffer_head **bh1,
88 struct inode *inode1,
89 struct buffer_head **bh2,
90 struct inode *inode2,
91 int rename);
92
93 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2);
94 /* An orphan dir name is an 8 byte value, printed as a hex string */
95 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
96
97 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
98 unsigned int flags)
99 {
100 int status;
101 u64 blkno;
102 struct inode *inode = NULL;
103 struct dentry *ret;
104 struct ocfs2_inode_info *oi;
105
106 trace_ocfs2_lookup(dir, dentry, dentry->d_name.len,
107 dentry->d_name.name,
108 (unsigned long long)OCFS2_I(dir)->ip_blkno, 0);
109
110 if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
111 ret = ERR_PTR(-ENAMETOOLONG);
112 goto bail;
113 }
114
115 status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
116 if (status < 0) {
117 if (status != -ENOENT)
118 mlog_errno(status);
119 ret = ERR_PTR(status);
120 goto bail;
121 }
122
123 status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
124 dentry->d_name.len, &blkno);
125 if (status < 0)
126 goto bail_add;
127
128 inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
129 if (IS_ERR(inode)) {
130 ret = ERR_PTR(-EACCES);
131 goto bail_unlock;
132 }
133
134 oi = OCFS2_I(inode);
135 /* Clear any orphaned state... If we were able to look up the
136 * inode from a directory, it certainly can't be orphaned. We
137 * might have the bad state from a node which intended to
138 * orphan this inode but crashed before it could commit the
139 * unlink. */
140 spin_lock(&oi->ip_lock);
141 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
142 spin_unlock(&oi->ip_lock);
143
144 bail_add:
145 ret = d_splice_alias(inode, dentry);
146
147 if (inode) {
148 /*
149 * If d_splice_alias() finds a DCACHE_DISCONNECTED
150 * dentry, it will d_move() it on top of ourse. The
151 * return value will indicate this however, so in
152 * those cases, we switch them around for the locking
153 * code.
154 *
155 * NOTE: This dentry already has ->d_op set from
156 * ocfs2_get_parent() and ocfs2_get_dentry()
157 */
158 if (!IS_ERR_OR_NULL(ret))
159 dentry = ret;
160
161 status = ocfs2_dentry_attach_lock(dentry, inode,
162 OCFS2_I(dir)->ip_blkno);
163 if (status) {
164 mlog_errno(status);
165 ret = ERR_PTR(status);
166 goto bail_unlock;
167 }
168 } else
169 ocfs2_dentry_attach_gen(dentry);
170
171 bail_unlock:
172 /* Don't drop the cluster lock until *after* the d_add --
173 * unlink on another node will message us to remove that
174 * dentry under this lock so otherwise we can race this with
175 * the downconvert thread and have a stale dentry. */
176 ocfs2_inode_unlock(dir, 0);
177
178 bail:
179
180 trace_ocfs2_lookup_ret(ret);
181
182 return ret;
183 }
184
185 static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode)
186 {
187 struct inode *inode;
188 int status;
189
190 inode = new_inode(dir->i_sb);
191 if (!inode) {
192 mlog(ML_ERROR, "new_inode failed!\n");
193 return ERR_PTR(-ENOMEM);
194 }
195
196 /* populate as many fields early on as possible - many of
197 * these are used by the support functions here and in
198 * callers. */
199 if (S_ISDIR(mode))
200 set_nlink(inode, 2);
201 inode_init_owner(&init_user_ns, inode, dir, mode);
202 status = dquot_initialize(inode);
203 if (status)
204 return ERR_PTR(status);
205
206 return inode;
207 }
208
209 static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb,
210 struct dentry *dentry, struct inode *inode)
211 {
212 struct ocfs2_dentry_lock *dl = dentry->d_fsdata;
213
214 ocfs2_simple_drop_lockres(osb, &dl->dl_lockres);
215 ocfs2_lock_res_free(&dl->dl_lockres);
216 BUG_ON(dl->dl_count != 1);
217 spin_lock(&dentry_attach_lock);
218 dentry->d_fsdata = NULL;
219 spin_unlock(&dentry_attach_lock);
220 kfree(dl);
221 iput(inode);
222 }
223
224 static int ocfs2_mknod(struct user_namespace *mnt_userns,
225 struct inode *dir,
226 struct dentry *dentry,
227 umode_t mode,
228 dev_t dev)
229 {
230 int status = 0;
231 struct buffer_head *parent_fe_bh = NULL;
232 handle_t *handle = NULL;
233 struct ocfs2_super *osb;
234 struct ocfs2_dinode *dirfe;
235 struct buffer_head *new_fe_bh = NULL;
236 struct inode *inode = NULL;
237 struct ocfs2_alloc_context *inode_ac = NULL;
238 struct ocfs2_alloc_context *data_ac = NULL;
239 struct ocfs2_alloc_context *meta_ac = NULL;
240 int want_clusters = 0;
241 int want_meta = 0;
242 int xattr_credits = 0;
243 struct ocfs2_security_xattr_info si = {
244 .enable = 1,
245 };
246 int did_quota_inode = 0;
247 struct ocfs2_dir_lookup_result lookup = { NULL, };
248 sigset_t oldset;
249 int did_block_signals = 0;
250 struct ocfs2_dentry_lock *dl = NULL;
251
252 trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
253 (unsigned long long)OCFS2_I(dir)->ip_blkno,
254 (unsigned long)dev, mode);
255
256 status = dquot_initialize(dir);
257 if (status) {
258 mlog_errno(status);
259 return status;
260 }
261
262 /* get our super block */
263 osb = OCFS2_SB(dir->i_sb);
264
265 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
266 if (status < 0) {
267 if (status != -ENOENT)
268 mlog_errno(status);
269 return status;
270 }
271
272 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
273 status = -EMLINK;
274 goto leave;
275 }
276
277 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
278 if (!ocfs2_read_links_count(dirfe)) {
279 /* can't make a file in a deleted directory. */
280 status = -ENOENT;
281 goto leave;
282 }
283
284 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
285 dentry->d_name.len);
286 if (status)
287 goto leave;
288
289 /* get a spot inside the dir. */
290 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
291 dentry->d_name.name,
292 dentry->d_name.len, &lookup);
293 if (status < 0) {
294 mlog_errno(status);
295 goto leave;
296 }
297
298 /* reserve an inode spot */
299 status = ocfs2_reserve_new_inode(osb, &inode_ac);
300 if (status < 0) {
301 if (status != -ENOSPC)
302 mlog_errno(status);
303 goto leave;
304 }
305
306 inode = ocfs2_get_init_inode(dir, mode);
307 if (IS_ERR(inode)) {
308 status = PTR_ERR(inode);
309 inode = NULL;
310 mlog_errno(status);
311 goto leave;
312 }
313
314 /* get security xattr */
315 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
316 if (status) {
317 if (status == -EOPNOTSUPP)
318 si.enable = 0;
319 else {
320 mlog_errno(status);
321 goto leave;
322 }
323 }
324
325 /* calculate meta data/clusters for setting security and acl xattr */
326 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
327 &si, &want_clusters,
328 &xattr_credits, &want_meta);
329 if (status < 0) {
330 mlog_errno(status);
331 goto leave;
332 }
333
334 /* Reserve a cluster if creating an extent based directory. */
335 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
336 want_clusters += 1;
337
338 /* Dir indexing requires extra space as well */
339 if (ocfs2_supports_indexed_dirs(osb))
340 want_meta++;
341 }
342
343 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
344 if (status < 0) {
345 if (status != -ENOSPC)
346 mlog_errno(status);
347 goto leave;
348 }
349
350 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
351 if (status < 0) {
352 if (status != -ENOSPC)
353 mlog_errno(status);
354 goto leave;
355 }
356
357 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
358 S_ISDIR(mode),
359 xattr_credits));
360 if (IS_ERR(handle)) {
361 status = PTR_ERR(handle);
362 handle = NULL;
363 mlog_errno(status);
364 goto leave;
365 }
366
367 /* Starting to change things, restart is no longer possible. */
368 ocfs2_block_signals(&oldset);
369 did_block_signals = 1;
370
371 status = dquot_alloc_inode(inode);
372 if (status)
373 goto leave;
374 did_quota_inode = 1;
375
376 /* do the real work now. */
377 status = ocfs2_mknod_locked(osb, dir, inode, dev,
378 &new_fe_bh, parent_fe_bh, handle,
379 inode_ac);
380 if (status < 0) {
381 mlog_errno(status);
382 goto leave;
383 }
384
385 if (S_ISDIR(mode)) {
386 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
387 new_fe_bh, data_ac, meta_ac);
388 if (status < 0) {
389 mlog_errno(status);
390 goto leave;
391 }
392
393 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
394 parent_fe_bh,
395 OCFS2_JOURNAL_ACCESS_WRITE);
396 if (status < 0) {
397 mlog_errno(status);
398 goto leave;
399 }
400 ocfs2_add_links_count(dirfe, 1);
401 ocfs2_journal_dirty(handle, parent_fe_bh);
402 inc_nlink(dir);
403 }
404
405 status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
406 meta_ac, data_ac);
407
408 if (status < 0) {
409 mlog_errno(status);
410 goto roll_back;
411 }
412
413 if (si.enable) {
414 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
415 meta_ac, data_ac);
416 if (status < 0) {
417 mlog_errno(status);
418 goto roll_back;
419 }
420 }
421
422 /*
423 * Do this before adding the entry to the directory. We add
424 * also set d_op after success so that ->d_iput() will cleanup
425 * the dentry lock even if ocfs2_add_entry() fails below.
426 */
427 status = ocfs2_dentry_attach_lock(dentry, inode,
428 OCFS2_I(dir)->ip_blkno);
429 if (status) {
430 mlog_errno(status);
431 goto roll_back;
432 }
433
434 dl = dentry->d_fsdata;
435
436 status = ocfs2_add_entry(handle, dentry, inode,
437 OCFS2_I(inode)->ip_blkno, parent_fe_bh,
438 &lookup);
439 if (status < 0) {
440 mlog_errno(status);
441 goto roll_back;
442 }
443
444 insert_inode_hash(inode);
445 d_instantiate(dentry, inode);
446 status = 0;
447
448 roll_back:
449 if (status < 0 && S_ISDIR(mode)) {
450 ocfs2_add_links_count(dirfe, -1);
451 drop_nlink(dir);
452 }
453
454 leave:
455 if (status < 0 && did_quota_inode)
456 dquot_free_inode(inode);
457 if (handle)
458 ocfs2_commit_trans(osb, handle);
459
460 ocfs2_inode_unlock(dir, 1);
461 if (did_block_signals)
462 ocfs2_unblock_signals(&oldset);
463
464 brelse(new_fe_bh);
465 brelse(parent_fe_bh);
466 kfree(si.value);
467
468 ocfs2_free_dir_lookup_result(&lookup);
469
470 if (inode_ac)
471 ocfs2_free_alloc_context(inode_ac);
472
473 if (data_ac)
474 ocfs2_free_alloc_context(data_ac);
475
476 if (meta_ac)
477 ocfs2_free_alloc_context(meta_ac);
478
479 /*
480 * We should call iput after the i_mutex of the bitmap been
481 * unlocked in ocfs2_free_alloc_context, or the
482 * ocfs2_delete_inode will mutex_lock again.
483 */
484 if ((status < 0) && inode) {
485 if (dl)
486 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
487
488 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
489 clear_nlink(inode);
490 iput(inode);
491 }
492
493 if (status)
494 mlog_errno(status);
495
496 return status;
497 }
498
499 static int __ocfs2_mknod_locked(struct inode *dir,
500 struct inode *inode,
501 dev_t dev,
502 struct buffer_head **new_fe_bh,
503 struct buffer_head *parent_fe_bh,
504 handle_t *handle,
505 struct ocfs2_alloc_context *inode_ac,
506 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
507 {
508 int status = 0;
509 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
510 struct ocfs2_dinode *fe = NULL;
511 struct ocfs2_extent_list *fel;
512 u16 feat;
513 struct ocfs2_inode_info *oi = OCFS2_I(inode);
514 struct timespec64 ts;
515
516 *new_fe_bh = NULL;
517
518 /* populate as many fields early on as possible - many of
519 * these are used by the support functions here and in
520 * callers. */
521 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
522 oi->ip_blkno = fe_blkno;
523 spin_lock(&osb->osb_lock);
524 inode->i_generation = osb->s_next_generation++;
525 spin_unlock(&osb->osb_lock);
526
527 *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
528 if (!*new_fe_bh) {
529 status = -ENOMEM;
530 mlog_errno(status);
531 goto leave;
532 }
533 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
534
535 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
536 *new_fe_bh,
537 OCFS2_JOURNAL_ACCESS_CREATE);
538 if (status < 0) {
539 mlog_errno(status);
540 goto leave;
541 }
542
543 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
544 memset(fe, 0, osb->sb->s_blocksize);
545
546 fe->i_generation = cpu_to_le32(inode->i_generation);
547 fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
548 fe->i_blkno = cpu_to_le64(fe_blkno);
549 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
550 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
551 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
552 fe->i_uid = cpu_to_le32(i_uid_read(inode));
553 fe->i_gid = cpu_to_le32(i_gid_read(inode));
554 fe->i_mode = cpu_to_le16(inode->i_mode);
555 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
556 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
557
558 ocfs2_set_links_count(fe, inode->i_nlink);
559
560 fe->i_last_eb_blk = 0;
561 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
562 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
563 ktime_get_real_ts64(&ts);
564 fe->i_atime = fe->i_ctime = fe->i_mtime =
565 cpu_to_le64(ts.tv_sec);
566 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
567 cpu_to_le32(ts.tv_nsec);
568 fe->i_dtime = 0;
569
570 /*
571 * If supported, directories start with inline data. If inline
572 * isn't supported, but indexing is, we start them as indexed.
573 */
574 feat = le16_to_cpu(fe->i_dyn_features);
575 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
576 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
577
578 fe->id2.i_data.id_count = cpu_to_le16(
579 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
580 } else {
581 fel = &fe->id2.i_list;
582 fel->l_tree_depth = 0;
583 fel->l_next_free_rec = 0;
584 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
585 }
586
587 ocfs2_journal_dirty(handle, *new_fe_bh);
588
589 ocfs2_populate_inode(inode, fe, 1);
590 ocfs2_ci_set_new(osb, INODE_CACHE(inode));
591 if (!ocfs2_mount_local(osb)) {
592 status = ocfs2_create_new_inode_locks(inode);
593 if (status < 0)
594 mlog_errno(status);
595 }
596
597 ocfs2_update_inode_fsync_trans(handle, inode, 1);
598
599 leave:
600 if (status < 0) {
601 if (*new_fe_bh) {
602 brelse(*new_fe_bh);
603 *new_fe_bh = NULL;
604 }
605 }
606
607 if (status)
608 mlog_errno(status);
609 return status;
610 }
611
612 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
613 struct inode *dir,
614 struct inode *inode,
615 dev_t dev,
616 struct buffer_head **new_fe_bh,
617 struct buffer_head *parent_fe_bh,
618 handle_t *handle,
619 struct ocfs2_alloc_context *inode_ac)
620 {
621 int status = 0;
622 u64 suballoc_loc, fe_blkno = 0;
623 u16 suballoc_bit;
624
625 *new_fe_bh = NULL;
626
627 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
628 inode_ac, &suballoc_loc,
629 &suballoc_bit, &fe_blkno);
630 if (status < 0) {
631 mlog_errno(status);
632 return status;
633 }
634
635 status = __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
636 parent_fe_bh, handle, inode_ac,
637 fe_blkno, suballoc_loc, suballoc_bit);
638 if (status < 0) {
639 u64 bg_blkno = ocfs2_which_suballoc_group(fe_blkno, suballoc_bit);
640 int tmp = ocfs2_free_suballoc_bits(handle, inode_ac->ac_inode,
641 inode_ac->ac_bh, suballoc_bit, bg_blkno, 1);
642 if (tmp)
643 mlog_errno(tmp);
644 }
645
646 return status;
647 }
648
649 static int ocfs2_mkdir(struct user_namespace *mnt_userns,
650 struct inode *dir,
651 struct dentry *dentry,
652 umode_t mode)
653 {
654 int ret;
655
656 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
657 OCFS2_I(dir)->ip_blkno, mode);
658 ret = ocfs2_mknod(&init_user_ns, dir, dentry, mode | S_IFDIR, 0);
659 if (ret)
660 mlog_errno(ret);
661
662 return ret;
663 }
664
665 static int ocfs2_create(struct user_namespace *mnt_userns,
666 struct inode *dir,
667 struct dentry *dentry,
668 umode_t mode,
669 bool excl)
670 {
671 int ret;
672
673 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
674 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
675 ret = ocfs2_mknod(&init_user_ns, dir, dentry, mode | S_IFREG, 0);
676 if (ret)
677 mlog_errno(ret);
678
679 return ret;
680 }
681
682 static int ocfs2_link(struct dentry *old_dentry,
683 struct inode *dir,
684 struct dentry *dentry)
685 {
686 handle_t *handle;
687 struct inode *inode = d_inode(old_dentry);
688 struct inode *old_dir = d_inode(old_dentry->d_parent);
689 int err;
690 struct buffer_head *fe_bh = NULL;
691 struct buffer_head *old_dir_bh = NULL;
692 struct buffer_head *parent_fe_bh = NULL;
693 struct ocfs2_dinode *fe = NULL;
694 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
695 struct ocfs2_dir_lookup_result lookup = { NULL, };
696 sigset_t oldset;
697 u64 old_de_ino;
698
699 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
700 old_dentry->d_name.len, old_dentry->d_name.name,
701 dentry->d_name.len, dentry->d_name.name);
702
703 if (S_ISDIR(inode->i_mode))
704 return -EPERM;
705
706 err = dquot_initialize(dir);
707 if (err) {
708 mlog_errno(err);
709 return err;
710 }
711
712 err = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
713 &parent_fe_bh, dir, 0);
714 if (err < 0) {
715 if (err != -ENOENT)
716 mlog_errno(err);
717 return err;
718 }
719
720 /* make sure both dirs have bhs
721 * get an extra ref on old_dir_bh if old==new */
722 if (!parent_fe_bh) {
723 if (old_dir_bh) {
724 parent_fe_bh = old_dir_bh;
725 get_bh(parent_fe_bh);
726 } else {
727 mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str);
728 err = -EIO;
729 goto out;
730 }
731 }
732
733 if (!dir->i_nlink) {
734 err = -ENOENT;
735 goto out;
736 }
737
738 err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
739 old_dentry->d_name.len, &old_de_ino);
740 if (err) {
741 err = -ENOENT;
742 goto out;
743 }
744
745 /*
746 * Check whether another node removed the source inode while we
747 * were in the vfs.
748 */
749 if (old_de_ino != OCFS2_I(inode)->ip_blkno) {
750 err = -ENOENT;
751 goto out;
752 }
753
754 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
755 dentry->d_name.len);
756 if (err)
757 goto out;
758
759 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
760 dentry->d_name.name,
761 dentry->d_name.len, &lookup);
762 if (err < 0) {
763 mlog_errno(err);
764 goto out;
765 }
766
767 err = ocfs2_inode_lock(inode, &fe_bh, 1);
768 if (err < 0) {
769 if (err != -ENOENT)
770 mlog_errno(err);
771 goto out;
772 }
773
774 fe = (struct ocfs2_dinode *) fe_bh->b_data;
775 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
776 err = -EMLINK;
777 goto out_unlock_inode;
778 }
779
780 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
781 if (IS_ERR(handle)) {
782 err = PTR_ERR(handle);
783 handle = NULL;
784 mlog_errno(err);
785 goto out_unlock_inode;
786 }
787
788 /* Starting to change things, restart is no longer possible. */
789 ocfs2_block_signals(&oldset);
790
791 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
792 OCFS2_JOURNAL_ACCESS_WRITE);
793 if (err < 0) {
794 mlog_errno(err);
795 goto out_commit;
796 }
797
798 inc_nlink(inode);
799 inode->i_ctime = current_time(inode);
800 ocfs2_set_links_count(fe, inode->i_nlink);
801 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
802 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
803 ocfs2_journal_dirty(handle, fe_bh);
804
805 err = ocfs2_add_entry(handle, dentry, inode,
806 OCFS2_I(inode)->ip_blkno,
807 parent_fe_bh, &lookup);
808 if (err) {
809 ocfs2_add_links_count(fe, -1);
810 drop_nlink(inode);
811 mlog_errno(err);
812 goto out_commit;
813 }
814
815 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
816 if (err) {
817 mlog_errno(err);
818 goto out_commit;
819 }
820
821 ihold(inode);
822 d_instantiate(dentry, inode);
823
824 out_commit:
825 ocfs2_commit_trans(osb, handle);
826 ocfs2_unblock_signals(&oldset);
827 out_unlock_inode:
828 ocfs2_inode_unlock(inode, 1);
829
830 out:
831 ocfs2_double_unlock(old_dir, dir);
832
833 brelse(fe_bh);
834 brelse(parent_fe_bh);
835 brelse(old_dir_bh);
836
837 ocfs2_free_dir_lookup_result(&lookup);
838
839 if (err)
840 mlog_errno(err);
841
842 return err;
843 }
844
845 /*
846 * Takes and drops an exclusive lock on the given dentry. This will
847 * force other nodes to drop it.
848 */
849 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
850 {
851 int ret;
852
853 ret = ocfs2_dentry_lock(dentry, 1);
854 if (ret)
855 mlog_errno(ret);
856 else
857 ocfs2_dentry_unlock(dentry, 1);
858
859 return ret;
860 }
861
862 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
863 {
864 if (S_ISDIR(inode->i_mode)) {
865 if (inode->i_nlink == 2)
866 return 1;
867 return 0;
868 }
869
870 if (inode->i_nlink == 1)
871 return 1;
872 return 0;
873 }
874
875 static int ocfs2_unlink(struct inode *dir,
876 struct dentry *dentry)
877 {
878 int status;
879 int child_locked = 0;
880 bool is_unlinkable = false;
881 struct inode *inode = d_inode(dentry);
882 struct inode *orphan_dir = NULL;
883 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
884 u64 blkno;
885 struct ocfs2_dinode *fe = NULL;
886 struct buffer_head *fe_bh = NULL;
887 struct buffer_head *parent_node_bh = NULL;
888 handle_t *handle = NULL;
889 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
890 struct ocfs2_dir_lookup_result lookup = { NULL, };
891 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
892
893 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
894 dentry->d_name.name,
895 (unsigned long long)OCFS2_I(dir)->ip_blkno,
896 (unsigned long long)OCFS2_I(inode)->ip_blkno);
897
898 status = dquot_initialize(dir);
899 if (status) {
900 mlog_errno(status);
901 return status;
902 }
903
904 BUG_ON(d_inode(dentry->d_parent) != dir);
905
906 if (inode == osb->root_inode)
907 return -EPERM;
908
909 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
910 OI_LS_PARENT);
911 if (status < 0) {
912 if (status != -ENOENT)
913 mlog_errno(status);
914 return status;
915 }
916
917 status = ocfs2_find_files_on_disk(dentry->d_name.name,
918 dentry->d_name.len, &blkno, dir,
919 &lookup);
920 if (status < 0) {
921 if (status != -ENOENT)
922 mlog_errno(status);
923 goto leave;
924 }
925
926 if (OCFS2_I(inode)->ip_blkno != blkno) {
927 status = -ENOENT;
928
929 trace_ocfs2_unlink_noent(
930 (unsigned long long)OCFS2_I(inode)->ip_blkno,
931 (unsigned long long)blkno,
932 OCFS2_I(inode)->ip_flags);
933 goto leave;
934 }
935
936 status = ocfs2_inode_lock(inode, &fe_bh, 1);
937 if (status < 0) {
938 if (status != -ENOENT)
939 mlog_errno(status);
940 goto leave;
941 }
942 child_locked = 1;
943
944 if (S_ISDIR(inode->i_mode)) {
945 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
946 status = -ENOTEMPTY;
947 goto leave;
948 }
949 }
950
951 status = ocfs2_remote_dentry_delete(dentry);
952 if (status < 0) {
953 /* This remote delete should succeed under all normal
954 * circumstances. */
955 mlog_errno(status);
956 goto leave;
957 }
958
959 if (ocfs2_inode_is_unlinkable(inode)) {
960 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
961 OCFS2_I(inode)->ip_blkno,
962 orphan_name, &orphan_insert,
963 false);
964 if (status < 0) {
965 mlog_errno(status);
966 goto leave;
967 }
968 is_unlinkable = true;
969 }
970
971 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
972 if (IS_ERR(handle)) {
973 status = PTR_ERR(handle);
974 handle = NULL;
975 mlog_errno(status);
976 goto leave;
977 }
978
979 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
980 OCFS2_JOURNAL_ACCESS_WRITE);
981 if (status < 0) {
982 mlog_errno(status);
983 goto leave;
984 }
985
986 fe = (struct ocfs2_dinode *) fe_bh->b_data;
987
988 /* delete the name from the parent dir */
989 status = ocfs2_delete_entry(handle, dir, &lookup);
990 if (status < 0) {
991 mlog_errno(status);
992 goto leave;
993 }
994
995 if (S_ISDIR(inode->i_mode))
996 drop_nlink(inode);
997 drop_nlink(inode);
998 ocfs2_set_links_count(fe, inode->i_nlink);
999 ocfs2_journal_dirty(handle, fe_bh);
1000
1001 dir->i_ctime = dir->i_mtime = current_time(dir);
1002 if (S_ISDIR(inode->i_mode))
1003 drop_nlink(dir);
1004
1005 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
1006 if (status < 0) {
1007 mlog_errno(status);
1008 if (S_ISDIR(inode->i_mode))
1009 inc_nlink(dir);
1010 goto leave;
1011 }
1012
1013 if (is_unlinkable) {
1014 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
1015 orphan_name, &orphan_insert, orphan_dir, false);
1016 if (status < 0)
1017 mlog_errno(status);
1018 }
1019
1020 leave:
1021 if (handle)
1022 ocfs2_commit_trans(osb, handle);
1023
1024 if (orphan_dir) {
1025 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1026 ocfs2_inode_unlock(orphan_dir, 1);
1027 inode_unlock(orphan_dir);
1028 iput(orphan_dir);
1029 }
1030
1031 if (child_locked)
1032 ocfs2_inode_unlock(inode, 1);
1033
1034 ocfs2_inode_unlock(dir, 1);
1035
1036 brelse(fe_bh);
1037 brelse(parent_node_bh);
1038
1039 ocfs2_free_dir_lookup_result(&orphan_insert);
1040 ocfs2_free_dir_lookup_result(&lookup);
1041
1042 if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
1043 mlog_errno(status);
1044
1045 return status;
1046 }
1047
1048 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb,
1049 u64 src_inode_no, u64 dest_inode_no)
1050 {
1051 int ret = 0, i = 0;
1052 u64 parent_inode_no = 0;
1053 u64 child_inode_no = src_inode_no;
1054 struct inode *child_inode;
1055
1056 #define MAX_LOOKUP_TIMES 32
1057 while (1) {
1058 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0);
1059 if (IS_ERR(child_inode)) {
1060 ret = PTR_ERR(child_inode);
1061 break;
1062 }
1063
1064 ret = ocfs2_inode_lock(child_inode, NULL, 0);
1065 if (ret < 0) {
1066 iput(child_inode);
1067 if (ret != -ENOENT)
1068 mlog_errno(ret);
1069 break;
1070 }
1071
1072 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2,
1073 &parent_inode_no);
1074 ocfs2_inode_unlock(child_inode, 0);
1075 iput(child_inode);
1076 if (ret < 0) {
1077 ret = -ENOENT;
1078 break;
1079 }
1080
1081 if (parent_inode_no == dest_inode_no) {
1082 ret = 1;
1083 break;
1084 }
1085
1086 if (parent_inode_no == osb->root_inode->i_ino) {
1087 ret = 0;
1088 break;
1089 }
1090
1091 child_inode_no = parent_inode_no;
1092
1093 if (++i >= MAX_LOOKUP_TIMES) {
1094 mlog_ratelimited(ML_NOTICE, "max lookup times reached, "
1095 "filesystem may have nested directories, "
1096 "src inode: %llu, dest inode: %llu.\n",
1097 (unsigned long long)src_inode_no,
1098 (unsigned long long)dest_inode_no);
1099 ret = 0;
1100 break;
1101 }
1102 }
1103
1104 return ret;
1105 }
1106
1107 /*
1108 * The only place this should be used is rename and link!
1109 * if they have the same id, then the 1st one is the only one locked.
1110 */
1111 static int ocfs2_double_lock(struct ocfs2_super *osb,
1112 struct buffer_head **bh1,
1113 struct inode *inode1,
1114 struct buffer_head **bh2,
1115 struct inode *inode2,
1116 int rename)
1117 {
1118 int status;
1119 int inode1_is_ancestor, inode2_is_ancestor;
1120 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
1121 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
1122
1123 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
1124 (unsigned long long)oi2->ip_blkno);
1125
1126 if (*bh1)
1127 *bh1 = NULL;
1128 if (*bh2)
1129 *bh2 = NULL;
1130
1131 /* we always want to lock the one with the lower lockid first.
1132 * and if they are nested, we lock ancestor first */
1133 if (oi1->ip_blkno != oi2->ip_blkno) {
1134 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno,
1135 oi1->ip_blkno);
1136 if (inode1_is_ancestor < 0) {
1137 status = inode1_is_ancestor;
1138 goto bail;
1139 }
1140
1141 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno,
1142 oi2->ip_blkno);
1143 if (inode2_is_ancestor < 0) {
1144 status = inode2_is_ancestor;
1145 goto bail;
1146 }
1147
1148 if ((inode1_is_ancestor == 1) ||
1149 (oi1->ip_blkno < oi2->ip_blkno &&
1150 inode2_is_ancestor == 0)) {
1151 /* switch id1 and id2 around */
1152 swap(bh2, bh1);
1153 swap(inode2, inode1);
1154 }
1155 /* lock id2 */
1156 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1157 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT);
1158 if (status < 0) {
1159 if (status != -ENOENT)
1160 mlog_errno(status);
1161 goto bail;
1162 }
1163 }
1164
1165 /* lock id1 */
1166 status = ocfs2_inode_lock_nested(inode1, bh1, 1,
1167 rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT);
1168 if (status < 0) {
1169 /*
1170 * An error return must mean that no cluster locks
1171 * were held on function exit.
1172 */
1173 if (oi1->ip_blkno != oi2->ip_blkno) {
1174 ocfs2_inode_unlock(inode2, 1);
1175 brelse(*bh2);
1176 *bh2 = NULL;
1177 }
1178
1179 if (status != -ENOENT)
1180 mlog_errno(status);
1181 }
1182
1183 trace_ocfs2_double_lock_end(
1184 (unsigned long long)oi1->ip_blkno,
1185 (unsigned long long)oi2->ip_blkno);
1186
1187 bail:
1188 if (status)
1189 mlog_errno(status);
1190 return status;
1191 }
1192
1193 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1194 {
1195 ocfs2_inode_unlock(inode1, 1);
1196
1197 if (inode1 != inode2)
1198 ocfs2_inode_unlock(inode2, 1);
1199 }
1200
1201 static int ocfs2_rename(struct user_namespace *mnt_userns,
1202 struct inode *old_dir,
1203 struct dentry *old_dentry,
1204 struct inode *new_dir,
1205 struct dentry *new_dentry,
1206 unsigned int flags)
1207 {
1208 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1209 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1210 struct inode *old_inode = d_inode(old_dentry);
1211 struct inode *new_inode = d_inode(new_dentry);
1212 struct inode *orphan_dir = NULL;
1213 struct ocfs2_dinode *newfe = NULL;
1214 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1215 struct buffer_head *newfe_bh = NULL;
1216 struct buffer_head *old_inode_bh = NULL;
1217 struct ocfs2_super *osb = NULL;
1218 u64 newfe_blkno, old_de_ino;
1219 handle_t *handle = NULL;
1220 struct buffer_head *old_dir_bh = NULL;
1221 struct buffer_head *new_dir_bh = NULL;
1222 u32 old_dir_nlink = old_dir->i_nlink;
1223 struct ocfs2_dinode *old_di;
1224 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1225 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1226 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1227 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1228 struct ocfs2_dir_lookup_result target_insert = { NULL, };
1229 bool should_add_orphan = false;
1230
1231 if (flags)
1232 return -EINVAL;
1233
1234 /* At some point it might be nice to break this function up a
1235 * bit. */
1236
1237 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1238 old_dentry->d_name.len, old_dentry->d_name.name,
1239 new_dentry->d_name.len, new_dentry->d_name.name);
1240
1241 status = dquot_initialize(old_dir);
1242 if (status) {
1243 mlog_errno(status);
1244 goto bail;
1245 }
1246 status = dquot_initialize(new_dir);
1247 if (status) {
1248 mlog_errno(status);
1249 goto bail;
1250 }
1251
1252 osb = OCFS2_SB(old_dir->i_sb);
1253
1254 if (new_inode) {
1255 if (!igrab(new_inode))
1256 BUG();
1257 }
1258
1259 /* Assume a directory hierarchy thusly:
1260 * a/b/c
1261 * a/d
1262 * a,b,c, and d are all directories.
1263 *
1264 * from cwd of 'a' on both nodes:
1265 * node1: mv b/c d
1266 * node2: mv d b/c
1267 *
1268 * And that's why, just like the VFS, we need a file system
1269 * rename lock. */
1270 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1271 status = ocfs2_rename_lock(osb);
1272 if (status < 0) {
1273 mlog_errno(status);
1274 goto bail;
1275 }
1276 rename_lock = 1;
1277
1278 /* here we cannot guarantee the inodes haven't just been
1279 * changed, so check if they are nested again */
1280 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino,
1281 old_inode->i_ino);
1282 if (status < 0) {
1283 mlog_errno(status);
1284 goto bail;
1285 } else if (status == 1) {
1286 status = -EPERM;
1287 trace_ocfs2_rename_not_permitted(
1288 (unsigned long long)old_inode->i_ino,
1289 (unsigned long long)new_dir->i_ino);
1290 goto bail;
1291 }
1292 }
1293
1294 /* if old and new are the same, this'll just do one lock. */
1295 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1296 &new_dir_bh, new_dir, 1);
1297 if (status < 0) {
1298 mlog_errno(status);
1299 goto bail;
1300 }
1301 parents_locked = 1;
1302
1303 if (!new_dir->i_nlink) {
1304 status = -EACCES;
1305 goto bail;
1306 }
1307
1308 /* make sure both dirs have bhs
1309 * get an extra ref on old_dir_bh if old==new */
1310 if (!new_dir_bh) {
1311 if (old_dir_bh) {
1312 new_dir_bh = old_dir_bh;
1313 get_bh(new_dir_bh);
1314 } else {
1315 mlog(ML_ERROR, "no old_dir_bh!\n");
1316 status = -EIO;
1317 goto bail;
1318 }
1319 }
1320
1321 /*
1322 * Aside from allowing a meta data update, the locking here
1323 * also ensures that the downconvert thread on other nodes
1324 * won't have to concurrently downconvert the inode and the
1325 * dentry locks.
1326 */
1327 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1328 OI_LS_PARENT);
1329 if (status < 0) {
1330 if (status != -ENOENT)
1331 mlog_errno(status);
1332 goto bail;
1333 }
1334 old_child_locked = 1;
1335
1336 status = ocfs2_remote_dentry_delete(old_dentry);
1337 if (status < 0) {
1338 mlog_errno(status);
1339 goto bail;
1340 }
1341
1342 if (S_ISDIR(old_inode->i_mode)) {
1343 u64 old_inode_parent;
1344
1345 update_dot_dot = 1;
1346 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1347 old_inode,
1348 &old_inode_dot_dot_res);
1349 if (status) {
1350 status = -EIO;
1351 goto bail;
1352 }
1353
1354 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1355 status = -EIO;
1356 goto bail;
1357 }
1358
1359 if (!new_inode && new_dir != old_dir &&
1360 new_dir->i_nlink >= ocfs2_link_max(osb)) {
1361 status = -EMLINK;
1362 goto bail;
1363 }
1364 }
1365
1366 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1367 old_dentry->d_name.len,
1368 &old_de_ino);
1369 if (status) {
1370 status = -ENOENT;
1371 goto bail;
1372 }
1373
1374 /*
1375 * Check for inode number is _not_ due to possible IO errors.
1376 * We might rmdir the source, keep it as pwd of some process
1377 * and merrily kill the link to whatever was created under the
1378 * same name. Goodbye sticky bit ;-<
1379 */
1380 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1381 status = -ENOENT;
1382 goto bail;
1383 }
1384
1385 /* check if the target already exists (in which case we need
1386 * to delete it */
1387 status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1388 new_dentry->d_name.len,
1389 &newfe_blkno, new_dir,
1390 &target_lookup_res);
1391 /* The only error we allow here is -ENOENT because the new
1392 * file not existing is perfectly valid. */
1393 if ((status < 0) && (status != -ENOENT)) {
1394 /* If we cannot find the file specified we should just */
1395 /* return the error... */
1396 mlog_errno(status);
1397 goto bail;
1398 }
1399 if (status == 0)
1400 target_exists = 1;
1401
1402 if (!target_exists && new_inode) {
1403 /*
1404 * Target was unlinked by another node while we were
1405 * waiting to get to ocfs2_rename(). There isn't
1406 * anything we can do here to help the situation, so
1407 * bubble up the appropriate error.
1408 */
1409 status = -ENOENT;
1410 goto bail;
1411 }
1412
1413 /* In case we need to overwrite an existing file, we blow it
1414 * away first */
1415 if (target_exists) {
1416 /* VFS didn't think there existed an inode here, but
1417 * someone else in the cluster must have raced our
1418 * rename to create one. Today we error cleanly, in
1419 * the future we should consider calling iget to build
1420 * a new struct inode for this entry. */
1421 if (!new_inode) {
1422 status = -EACCES;
1423
1424 trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1425 new_dentry->d_name.name);
1426 goto bail;
1427 }
1428
1429 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1430 status = -EACCES;
1431
1432 trace_ocfs2_rename_disagree(
1433 (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1434 (unsigned long long)newfe_blkno,
1435 OCFS2_I(new_inode)->ip_flags);
1436 goto bail;
1437 }
1438
1439 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1440 if (status < 0) {
1441 if (status != -ENOENT)
1442 mlog_errno(status);
1443 goto bail;
1444 }
1445 new_child_locked = 1;
1446
1447 status = ocfs2_remote_dentry_delete(new_dentry);
1448 if (status < 0) {
1449 mlog_errno(status);
1450 goto bail;
1451 }
1452
1453 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1454
1455 trace_ocfs2_rename_over_existing(
1456 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1457 (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1458
1459 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1460 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1461 OCFS2_I(new_inode)->ip_blkno,
1462 orphan_name, &orphan_insert,
1463 false);
1464 if (status < 0) {
1465 mlog_errno(status);
1466 goto bail;
1467 }
1468 should_add_orphan = true;
1469 }
1470 } else {
1471 BUG_ON(d_inode(new_dentry->d_parent) != new_dir);
1472
1473 status = ocfs2_check_dir_for_entry(new_dir,
1474 new_dentry->d_name.name,
1475 new_dentry->d_name.len);
1476 if (status)
1477 goto bail;
1478
1479 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1480 new_dentry->d_name.name,
1481 new_dentry->d_name.len,
1482 &target_insert);
1483 if (status < 0) {
1484 mlog_errno(status);
1485 goto bail;
1486 }
1487 }
1488
1489 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1490 if (IS_ERR(handle)) {
1491 status = PTR_ERR(handle);
1492 handle = NULL;
1493 mlog_errno(status);
1494 goto bail;
1495 }
1496
1497 if (target_exists) {
1498 if (S_ISDIR(new_inode->i_mode)) {
1499 if (new_inode->i_nlink != 2 ||
1500 !ocfs2_empty_dir(new_inode)) {
1501 status = -ENOTEMPTY;
1502 goto bail;
1503 }
1504 }
1505 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1506 newfe_bh,
1507 OCFS2_JOURNAL_ACCESS_WRITE);
1508 if (status < 0) {
1509 mlog_errno(status);
1510 goto bail;
1511 }
1512
1513 /* change the dirent to point to the correct inode */
1514 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1515 old_inode);
1516 if (status < 0) {
1517 mlog_errno(status);
1518 goto bail;
1519 }
1520 inode_inc_iversion(new_dir);
1521
1522 if (S_ISDIR(new_inode->i_mode))
1523 ocfs2_set_links_count(newfe, 0);
1524 else
1525 ocfs2_add_links_count(newfe, -1);
1526 ocfs2_journal_dirty(handle, newfe_bh);
1527 if (should_add_orphan) {
1528 status = ocfs2_orphan_add(osb, handle, new_inode,
1529 newfe_bh, orphan_name,
1530 &orphan_insert, orphan_dir, false);
1531 if (status < 0) {
1532 mlog_errno(status);
1533 goto bail;
1534 }
1535 }
1536 } else {
1537 /* if the name was not found in new_dir, add it now */
1538 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1539 OCFS2_I(old_inode)->ip_blkno,
1540 new_dir_bh, &target_insert);
1541 }
1542
1543 old_inode->i_ctime = current_time(old_inode);
1544 mark_inode_dirty(old_inode);
1545
1546 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1547 old_inode_bh,
1548 OCFS2_JOURNAL_ACCESS_WRITE);
1549 if (status >= 0) {
1550 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1551
1552 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1553 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1554 ocfs2_journal_dirty(handle, old_inode_bh);
1555 } else
1556 mlog_errno(status);
1557
1558 /*
1559 * Now that the name has been added to new_dir, remove the old name.
1560 *
1561 * We don't keep any directory entry context around until now
1562 * because the insert might have changed the type of directory
1563 * we're dealing with.
1564 */
1565 status = ocfs2_find_entry(old_dentry->d_name.name,
1566 old_dentry->d_name.len, old_dir,
1567 &old_entry_lookup);
1568 if (status) {
1569 if (!is_journal_aborted(osb->journal->j_journal)) {
1570 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1571 "is not deleted.",
1572 new_dentry->d_name.len, new_dentry->d_name.name,
1573 old_dentry->d_name.len, old_dentry->d_name.name);
1574 }
1575 goto bail;
1576 }
1577
1578 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1579 if (status < 0) {
1580 mlog_errno(status);
1581 if (!is_journal_aborted(osb->journal->j_journal)) {
1582 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1583 "is not deleted.",
1584 new_dentry->d_name.len, new_dentry->d_name.name,
1585 old_dentry->d_name.len, old_dentry->d_name.name);
1586 }
1587 goto bail;
1588 }
1589
1590 if (new_inode) {
1591 drop_nlink(new_inode);
1592 new_inode->i_ctime = current_time(new_inode);
1593 }
1594 old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir);
1595
1596 if (update_dot_dot) {
1597 status = ocfs2_update_entry(old_inode, handle,
1598 &old_inode_dot_dot_res, new_dir);
1599 drop_nlink(old_dir);
1600 if (new_inode) {
1601 drop_nlink(new_inode);
1602 } else {
1603 inc_nlink(new_dir);
1604 mark_inode_dirty(new_dir);
1605 }
1606 }
1607 mark_inode_dirty(old_dir);
1608 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1609 if (new_inode) {
1610 mark_inode_dirty(new_inode);
1611 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1612 }
1613
1614 if (old_dir != new_dir) {
1615 /* Keep the same times on both directories.*/
1616 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1617
1618 /*
1619 * This will also pick up the i_nlink change from the
1620 * block above.
1621 */
1622 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1623 }
1624
1625 if (old_dir_nlink != old_dir->i_nlink) {
1626 if (!old_dir_bh) {
1627 mlog(ML_ERROR, "need to change nlink for old dir "
1628 "%llu from %d to %d but bh is NULL!\n",
1629 (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1630 (int)old_dir_nlink, old_dir->i_nlink);
1631 } else {
1632 struct ocfs2_dinode *fe;
1633 status = ocfs2_journal_access_di(handle,
1634 INODE_CACHE(old_dir),
1635 old_dir_bh,
1636 OCFS2_JOURNAL_ACCESS_WRITE);
1637 fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1638 ocfs2_set_links_count(fe, old_dir->i_nlink);
1639 ocfs2_journal_dirty(handle, old_dir_bh);
1640 }
1641 }
1642 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1643 status = 0;
1644 bail:
1645 if (handle)
1646 ocfs2_commit_trans(osb, handle);
1647
1648 if (orphan_dir) {
1649 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1650 ocfs2_inode_unlock(orphan_dir, 1);
1651 inode_unlock(orphan_dir);
1652 iput(orphan_dir);
1653 }
1654
1655 if (new_child_locked)
1656 ocfs2_inode_unlock(new_inode, 1);
1657
1658 if (old_child_locked)
1659 ocfs2_inode_unlock(old_inode, 1);
1660
1661 if (parents_locked)
1662 ocfs2_double_unlock(old_dir, new_dir);
1663
1664 if (rename_lock)
1665 ocfs2_rename_unlock(osb);
1666
1667 if (new_inode)
1668 sync_mapping_buffers(old_inode->i_mapping);
1669
1670 iput(new_inode);
1671
1672 ocfs2_free_dir_lookup_result(&target_lookup_res);
1673 ocfs2_free_dir_lookup_result(&old_entry_lookup);
1674 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1675 ocfs2_free_dir_lookup_result(&orphan_insert);
1676 ocfs2_free_dir_lookup_result(&target_insert);
1677
1678 brelse(newfe_bh);
1679 brelse(old_inode_bh);
1680 brelse(old_dir_bh);
1681 brelse(new_dir_bh);
1682
1683 if (status)
1684 mlog_errno(status);
1685
1686 return status;
1687 }
1688
1689 /*
1690 * we expect i_size = strlen(symname). Copy symname into the file
1691 * data, including the null terminator.
1692 */
1693 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1694 handle_t *handle,
1695 struct inode *inode,
1696 const char *symname)
1697 {
1698 struct buffer_head **bhs = NULL;
1699 const char *c;
1700 struct super_block *sb = osb->sb;
1701 u64 p_blkno, p_blocks;
1702 int virtual, blocks, status, i, bytes_left;
1703
1704 bytes_left = i_size_read(inode) + 1;
1705 /* we can't trust i_blocks because we're actually going to
1706 * write i_size + 1 bytes. */
1707 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1708
1709 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1710 i_size_read(inode), blocks);
1711
1712 /* Sanity check -- make sure we're going to fit. */
1713 if (bytes_left >
1714 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1715 status = -EIO;
1716 mlog_errno(status);
1717 goto bail;
1718 }
1719
1720 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1721 if (!bhs) {
1722 status = -ENOMEM;
1723 mlog_errno(status);
1724 goto bail;
1725 }
1726
1727 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1728 NULL);
1729 if (status < 0) {
1730 mlog_errno(status);
1731 goto bail;
1732 }
1733
1734 /* links can never be larger than one cluster so we know this
1735 * is all going to be contiguous, but do a sanity check
1736 * anyway. */
1737 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1738 status = -EIO;
1739 mlog_errno(status);
1740 goto bail;
1741 }
1742
1743 virtual = 0;
1744 while(bytes_left > 0) {
1745 c = &symname[virtual * sb->s_blocksize];
1746
1747 bhs[virtual] = sb_getblk(sb, p_blkno);
1748 if (!bhs[virtual]) {
1749 status = -ENOMEM;
1750 mlog_errno(status);
1751 goto bail;
1752 }
1753 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1754 bhs[virtual]);
1755
1756 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1757 bhs[virtual],
1758 OCFS2_JOURNAL_ACCESS_CREATE);
1759 if (status < 0) {
1760 mlog_errno(status);
1761 goto bail;
1762 }
1763
1764 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1765
1766 memcpy(bhs[virtual]->b_data, c,
1767 (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1768 bytes_left);
1769
1770 ocfs2_journal_dirty(handle, bhs[virtual]);
1771
1772 virtual++;
1773 p_blkno++;
1774 bytes_left -= sb->s_blocksize;
1775 }
1776
1777 status = 0;
1778 bail:
1779
1780 if (bhs) {
1781 for(i = 0; i < blocks; i++)
1782 brelse(bhs[i]);
1783 kfree(bhs);
1784 }
1785
1786 if (status)
1787 mlog_errno(status);
1788 return status;
1789 }
1790
1791 static int ocfs2_symlink(struct user_namespace *mnt_userns,
1792 struct inode *dir,
1793 struct dentry *dentry,
1794 const char *symname)
1795 {
1796 int status, l, credits;
1797 u64 newsize;
1798 struct ocfs2_super *osb = NULL;
1799 struct inode *inode = NULL;
1800 struct super_block *sb;
1801 struct buffer_head *new_fe_bh = NULL;
1802 struct buffer_head *parent_fe_bh = NULL;
1803 struct ocfs2_dinode *fe = NULL;
1804 struct ocfs2_dinode *dirfe;
1805 handle_t *handle = NULL;
1806 struct ocfs2_alloc_context *inode_ac = NULL;
1807 struct ocfs2_alloc_context *data_ac = NULL;
1808 struct ocfs2_alloc_context *xattr_ac = NULL;
1809 int want_clusters = 0;
1810 int xattr_credits = 0;
1811 struct ocfs2_security_xattr_info si = {
1812 .enable = 1,
1813 };
1814 int did_quota = 0, did_quota_inode = 0;
1815 struct ocfs2_dir_lookup_result lookup = { NULL, };
1816 sigset_t oldset;
1817 int did_block_signals = 0;
1818 struct ocfs2_dentry_lock *dl = NULL;
1819
1820 trace_ocfs2_symlink_begin(dir, dentry, symname,
1821 dentry->d_name.len, dentry->d_name.name);
1822
1823 status = dquot_initialize(dir);
1824 if (status) {
1825 mlog_errno(status);
1826 goto bail;
1827 }
1828
1829 sb = dir->i_sb;
1830 osb = OCFS2_SB(sb);
1831
1832 l = strlen(symname) + 1;
1833
1834 credits = ocfs2_calc_symlink_credits(sb);
1835
1836 /* lock the parent directory */
1837 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1838 if (status < 0) {
1839 if (status != -ENOENT)
1840 mlog_errno(status);
1841 return status;
1842 }
1843
1844 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1845 if (!ocfs2_read_links_count(dirfe)) {
1846 /* can't make a file in a deleted directory. */
1847 status = -ENOENT;
1848 goto bail;
1849 }
1850
1851 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1852 dentry->d_name.len);
1853 if (status)
1854 goto bail;
1855
1856 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1857 dentry->d_name.name,
1858 dentry->d_name.len, &lookup);
1859 if (status < 0) {
1860 mlog_errno(status);
1861 goto bail;
1862 }
1863
1864 status = ocfs2_reserve_new_inode(osb, &inode_ac);
1865 if (status < 0) {
1866 if (status != -ENOSPC)
1867 mlog_errno(status);
1868 goto bail;
1869 }
1870
1871 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1872 if (IS_ERR(inode)) {
1873 status = PTR_ERR(inode);
1874 inode = NULL;
1875 mlog_errno(status);
1876 goto bail;
1877 }
1878
1879 /* get security xattr */
1880 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1881 if (status) {
1882 if (status == -EOPNOTSUPP)
1883 si.enable = 0;
1884 else {
1885 mlog_errno(status);
1886 goto bail;
1887 }
1888 }
1889
1890 /* calculate meta data/clusters for setting security xattr */
1891 if (si.enable) {
1892 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1893 &xattr_credits, &xattr_ac);
1894 if (status < 0) {
1895 mlog_errno(status);
1896 goto bail;
1897 }
1898 }
1899
1900 /* don't reserve bitmap space for fast symlinks. */
1901 if (l > ocfs2_fast_symlink_chars(sb))
1902 want_clusters += 1;
1903
1904 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1905 if (status < 0) {
1906 if (status != -ENOSPC)
1907 mlog_errno(status);
1908 goto bail;
1909 }
1910
1911 handle = ocfs2_start_trans(osb, credits + xattr_credits);
1912 if (IS_ERR(handle)) {
1913 status = PTR_ERR(handle);
1914 handle = NULL;
1915 mlog_errno(status);
1916 goto bail;
1917 }
1918
1919 /* Starting to change things, restart is no longer possible. */
1920 ocfs2_block_signals(&oldset);
1921 did_block_signals = 1;
1922
1923 status = dquot_alloc_inode(inode);
1924 if (status)
1925 goto bail;
1926 did_quota_inode = 1;
1927
1928 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1929 dentry->d_name.name,
1930 (unsigned long long)OCFS2_I(dir)->ip_blkno,
1931 inode->i_mode);
1932
1933 status = ocfs2_mknod_locked(osb, dir, inode,
1934 0, &new_fe_bh, parent_fe_bh, handle,
1935 inode_ac);
1936 if (status < 0) {
1937 mlog_errno(status);
1938 goto bail;
1939 }
1940
1941 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1942 inode->i_rdev = 0;
1943 newsize = l - 1;
1944 inode->i_op = &ocfs2_symlink_inode_operations;
1945 inode_nohighmem(inode);
1946 if (l > ocfs2_fast_symlink_chars(sb)) {
1947 u32 offset = 0;
1948
1949 status = dquot_alloc_space_nodirty(inode,
1950 ocfs2_clusters_to_bytes(osb->sb, 1));
1951 if (status)
1952 goto bail;
1953 did_quota = 1;
1954 inode->i_mapping->a_ops = &ocfs2_aops;
1955 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1956 new_fe_bh,
1957 handle, data_ac, NULL,
1958 NULL);
1959 if (status < 0) {
1960 if (status != -ENOSPC && status != -EINTR) {
1961 mlog(ML_ERROR,
1962 "Failed to extend file to %llu\n",
1963 (unsigned long long)newsize);
1964 mlog_errno(status);
1965 status = -ENOSPC;
1966 }
1967 goto bail;
1968 }
1969 i_size_write(inode, newsize);
1970 inode->i_blocks = ocfs2_inode_sector_count(inode);
1971 } else {
1972 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1973 memcpy((char *) fe->id2.i_symlink, symname, l);
1974 i_size_write(inode, newsize);
1975 inode->i_blocks = 0;
1976 }
1977
1978 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1979 if (status < 0) {
1980 mlog_errno(status);
1981 goto bail;
1982 }
1983
1984 if (!ocfs2_inode_is_fast_symlink(inode)) {
1985 status = ocfs2_create_symlink_data(osb, handle, inode,
1986 symname);
1987 if (status < 0) {
1988 mlog_errno(status);
1989 goto bail;
1990 }
1991 }
1992
1993 if (si.enable) {
1994 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1995 xattr_ac, data_ac);
1996 if (status < 0) {
1997 mlog_errno(status);
1998 goto bail;
1999 }
2000 }
2001
2002 /*
2003 * Do this before adding the entry to the directory. We add
2004 * also set d_op after success so that ->d_iput() will cleanup
2005 * the dentry lock even if ocfs2_add_entry() fails below.
2006 */
2007 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
2008 if (status) {
2009 mlog_errno(status);
2010 goto bail;
2011 }
2012
2013 dl = dentry->d_fsdata;
2014
2015 status = ocfs2_add_entry(handle, dentry, inode,
2016 le64_to_cpu(fe->i_blkno), parent_fe_bh,
2017 &lookup);
2018 if (status < 0) {
2019 mlog_errno(status);
2020 goto bail;
2021 }
2022
2023 insert_inode_hash(inode);
2024 d_instantiate(dentry, inode);
2025 bail:
2026 if (status < 0 && did_quota)
2027 dquot_free_space_nodirty(inode,
2028 ocfs2_clusters_to_bytes(osb->sb, 1));
2029 if (status < 0 && did_quota_inode)
2030 dquot_free_inode(inode);
2031 if (handle)
2032 ocfs2_commit_trans(osb, handle);
2033
2034 ocfs2_inode_unlock(dir, 1);
2035 if (did_block_signals)
2036 ocfs2_unblock_signals(&oldset);
2037
2038 brelse(new_fe_bh);
2039 brelse(parent_fe_bh);
2040 kfree(si.value);
2041 ocfs2_free_dir_lookup_result(&lookup);
2042 if (inode_ac)
2043 ocfs2_free_alloc_context(inode_ac);
2044 if (data_ac)
2045 ocfs2_free_alloc_context(data_ac);
2046 if (xattr_ac)
2047 ocfs2_free_alloc_context(xattr_ac);
2048 if ((status < 0) && inode) {
2049 if (dl)
2050 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2051
2052 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
2053 clear_nlink(inode);
2054 iput(inode);
2055 }
2056
2057 if (status)
2058 mlog_errno(status);
2059
2060 return status;
2061 }
2062
2063 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2064 {
2065 int status, namelen;
2066
2067 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2068 (long long)blkno);
2069 if (namelen <= 0) {
2070 if (namelen)
2071 status = namelen;
2072 else
2073 status = -EINVAL;
2074 mlog_errno(status);
2075 goto bail;
2076 }
2077 if (namelen != OCFS2_ORPHAN_NAMELEN) {
2078 status = -EINVAL;
2079 mlog_errno(status);
2080 goto bail;
2081 }
2082
2083 trace_ocfs2_blkno_stringify(blkno, name, namelen);
2084
2085 status = 0;
2086 bail:
2087 if (status < 0)
2088 mlog_errno(status);
2089 return status;
2090 }
2091
2092 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2093 struct inode **ret_orphan_dir,
2094 struct buffer_head **ret_orphan_dir_bh)
2095 {
2096 struct inode *orphan_dir_inode;
2097 struct buffer_head *orphan_dir_bh = NULL;
2098 int ret = 0;
2099
2100 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2101 ORPHAN_DIR_SYSTEM_INODE,
2102 osb->slot_num);
2103 if (!orphan_dir_inode) {
2104 ret = -ENOENT;
2105 mlog_errno(ret);
2106 return ret;
2107 }
2108
2109 inode_lock(orphan_dir_inode);
2110
2111 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2112 if (ret < 0) {
2113 inode_unlock(orphan_dir_inode);
2114 iput(orphan_dir_inode);
2115
2116 mlog_errno(ret);
2117 return ret;
2118 }
2119
2120 *ret_orphan_dir = orphan_dir_inode;
2121 *ret_orphan_dir_bh = orphan_dir_bh;
2122
2123 return 0;
2124 }
2125
2126 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2127 struct buffer_head *orphan_dir_bh,
2128 u64 blkno,
2129 char *name,
2130 struct ocfs2_dir_lookup_result *lookup,
2131 bool dio)
2132 {
2133 int ret;
2134 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2135 int namelen = dio ?
2136 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2137 OCFS2_ORPHAN_NAMELEN;
2138
2139 if (dio) {
2140 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2141 OCFS2_DIO_ORPHAN_PREFIX);
2142 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2143 ret = -EINVAL;
2144 mlog_errno(ret);
2145 return ret;
2146 }
2147
2148 ret = ocfs2_blkno_stringify(blkno,
2149 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2150 } else
2151 ret = ocfs2_blkno_stringify(blkno, name);
2152 if (ret < 0) {
2153 mlog_errno(ret);
2154 return ret;
2155 }
2156
2157 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2158 orphan_dir_bh, name,
2159 namelen, lookup);
2160 if (ret < 0) {
2161 mlog_errno(ret);
2162 return ret;
2163 }
2164
2165 return 0;
2166 }
2167
2168 /**
2169 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2170 * insertion of an orphan.
2171 * @osb: ocfs2 file system
2172 * @ret_orphan_dir: Orphan dir inode - returned locked!
2173 * @blkno: Actual block number of the inode to be inserted into orphan dir.
2174 * @lookup: dir lookup result, to be passed back into functions like
2175 * ocfs2_orphan_add
2176 *
2177 * Returns zero on success and the ret_orphan_dir, name and lookup
2178 * fields will be populated.
2179 *
2180 * Returns non-zero on failure.
2181 */
2182 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2183 struct inode **ret_orphan_dir,
2184 u64 blkno,
2185 char *name,
2186 struct ocfs2_dir_lookup_result *lookup,
2187 bool dio)
2188 {
2189 struct inode *orphan_dir_inode = NULL;
2190 struct buffer_head *orphan_dir_bh = NULL;
2191 int ret = 0;
2192
2193 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2194 &orphan_dir_bh);
2195 if (ret < 0) {
2196 mlog_errno(ret);
2197 return ret;
2198 }
2199
2200 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2201 blkno, name, lookup, dio);
2202 if (ret < 0) {
2203 mlog_errno(ret);
2204 goto out;
2205 }
2206
2207 *ret_orphan_dir = orphan_dir_inode;
2208
2209 out:
2210 brelse(orphan_dir_bh);
2211
2212 if (ret) {
2213 ocfs2_inode_unlock(orphan_dir_inode, 1);
2214 inode_unlock(orphan_dir_inode);
2215 iput(orphan_dir_inode);
2216 }
2217
2218 if (ret)
2219 mlog_errno(ret);
2220 return ret;
2221 }
2222
2223 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2224 handle_t *handle,
2225 struct inode *inode,
2226 struct buffer_head *fe_bh,
2227 char *name,
2228 struct ocfs2_dir_lookup_result *lookup,
2229 struct inode *orphan_dir_inode,
2230 bool dio)
2231 {
2232 struct buffer_head *orphan_dir_bh = NULL;
2233 int status = 0;
2234 struct ocfs2_dinode *orphan_fe;
2235 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2236 int namelen = dio ?
2237 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2238 OCFS2_ORPHAN_NAMELEN;
2239
2240 trace_ocfs2_orphan_add_begin(
2241 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2242
2243 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2244 if (status < 0) {
2245 mlog_errno(status);
2246 goto leave;
2247 }
2248
2249 status = ocfs2_journal_access_di(handle,
2250 INODE_CACHE(orphan_dir_inode),
2251 orphan_dir_bh,
2252 OCFS2_JOURNAL_ACCESS_WRITE);
2253 if (status < 0) {
2254 mlog_errno(status);
2255 goto leave;
2256 }
2257
2258 /*
2259 * We're going to journal the change of i_flags and i_orphaned_slot.
2260 * It's safe anyway, though some callers may duplicate the journaling.
2261 * Journaling within the func just make the logic look more
2262 * straightforward.
2263 */
2264 status = ocfs2_journal_access_di(handle,
2265 INODE_CACHE(inode),
2266 fe_bh,
2267 OCFS2_JOURNAL_ACCESS_WRITE);
2268 if (status < 0) {
2269 mlog_errno(status);
2270 goto leave;
2271 }
2272
2273 /* we're a cluster, and nlink can change on disk from
2274 * underneath us... */
2275 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2276 if (S_ISDIR(inode->i_mode))
2277 ocfs2_add_links_count(orphan_fe, 1);
2278 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2279 ocfs2_journal_dirty(handle, orphan_dir_bh);
2280
2281 status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2282 namelen, inode,
2283 OCFS2_I(inode)->ip_blkno,
2284 orphan_dir_bh, lookup);
2285 if (status < 0) {
2286 mlog_errno(status);
2287 goto rollback;
2288 }
2289
2290 if (dio) {
2291 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan
2292 * slot.
2293 */
2294 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2295 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num);
2296 } else {
2297 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2298 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2299
2300 /* Record which orphan dir our inode now resides
2301 * in. delete_inode will use this to determine which orphan
2302 * dir to lock. */
2303 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2304 }
2305
2306 ocfs2_journal_dirty(handle, fe_bh);
2307
2308 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2309 osb->slot_num);
2310
2311 rollback:
2312 if (status < 0) {
2313 if (S_ISDIR(inode->i_mode))
2314 ocfs2_add_links_count(orphan_fe, -1);
2315 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2316 }
2317
2318 leave:
2319 brelse(orphan_dir_bh);
2320
2321 return status;
2322 }
2323
2324 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2325 int ocfs2_orphan_del(struct ocfs2_super *osb,
2326 handle_t *handle,
2327 struct inode *orphan_dir_inode,
2328 struct inode *inode,
2329 struct buffer_head *orphan_dir_bh,
2330 bool dio)
2331 {
2332 char name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2333 struct ocfs2_dinode *orphan_fe;
2334 int status = 0;
2335 struct ocfs2_dir_lookup_result lookup = { NULL, };
2336
2337 if (dio) {
2338 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2339 OCFS2_DIO_ORPHAN_PREFIX);
2340 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2341 status = -EINVAL;
2342 mlog_errno(status);
2343 return status;
2344 }
2345
2346 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno,
2347 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2348 } else
2349 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2350 if (status < 0) {
2351 mlog_errno(status);
2352 goto leave;
2353 }
2354
2355 trace_ocfs2_orphan_del(
2356 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2357 name, strlen(name));
2358
2359 status = ocfs2_journal_access_di(handle,
2360 INODE_CACHE(orphan_dir_inode),
2361 orphan_dir_bh,
2362 OCFS2_JOURNAL_ACCESS_WRITE);
2363 if (status < 0) {
2364 mlog_errno(status);
2365 goto leave;
2366 }
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 /* do the i_nlink dance! :) */
2384 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2385 if (S_ISDIR(inode->i_mode))
2386 ocfs2_add_links_count(orphan_fe, -1);
2387 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2388 ocfs2_journal_dirty(handle, orphan_dir_bh);
2389
2390 leave:
2391 ocfs2_free_dir_lookup_result(&lookup);
2392
2393 if (status)
2394 mlog_errno(status);
2395 return status;
2396 }
2397
2398 /**
2399 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2400 * allocated file. This is different from the typical 'add to orphan dir'
2401 * operation in that the inode does not yet exist. This is a problem because
2402 * the orphan dir stringifies the inode block number to come up with it's
2403 * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2404 * problem. This function works around it by calling deeper into the orphan
2405 * and suballoc code than other callers. Use this only by necessity.
2406 * @dir: The directory which this inode will ultimately wind up under - not the
2407 * orphan dir!
2408 * @dir_bh: buffer_head the @dir inode block
2409 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2410 * with the string to be used for orphan dirent. Pass back to the orphan dir
2411 * code.
2412 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2413 * dir code.
2414 * @ret_di_blkno: block number where the new inode will be allocated.
2415 * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2416 * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2417 *
2418 * Returns zero on success and the ret_orphan_dir, name and lookup
2419 * fields will be populated.
2420 *
2421 * Returns non-zero on failure.
2422 */
2423 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2424 struct buffer_head *dir_bh,
2425 char *orphan_name,
2426 struct inode **ret_orphan_dir,
2427 u64 *ret_di_blkno,
2428 struct ocfs2_dir_lookup_result *orphan_insert,
2429 struct ocfs2_alloc_context **ret_inode_ac)
2430 {
2431 int ret;
2432 u64 di_blkno;
2433 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2434 struct inode *orphan_dir = NULL;
2435 struct buffer_head *orphan_dir_bh = NULL;
2436 struct ocfs2_alloc_context *inode_ac = NULL;
2437
2438 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2439 if (ret < 0) {
2440 mlog_errno(ret);
2441 return ret;
2442 }
2443
2444 /* reserve an inode spot */
2445 ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2446 if (ret < 0) {
2447 if (ret != -ENOSPC)
2448 mlog_errno(ret);
2449 goto out;
2450 }
2451
2452 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2453 &di_blkno);
2454 if (ret) {
2455 mlog_errno(ret);
2456 goto out;
2457 }
2458
2459 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2460 di_blkno, orphan_name, orphan_insert,
2461 false);
2462 if (ret < 0) {
2463 mlog_errno(ret);
2464 goto out;
2465 }
2466
2467 out:
2468 if (ret == 0) {
2469 *ret_orphan_dir = orphan_dir;
2470 *ret_di_blkno = di_blkno;
2471 *ret_inode_ac = inode_ac;
2472 /*
2473 * orphan_name and orphan_insert are already up to
2474 * date via prepare_orphan_dir
2475 */
2476 } else {
2477 /* Unroll reserve_new_inode* */
2478 if (inode_ac)
2479 ocfs2_free_alloc_context(inode_ac);
2480
2481 /* Unroll orphan dir locking */
2482 inode_unlock(orphan_dir);
2483 ocfs2_inode_unlock(orphan_dir, 1);
2484 iput(orphan_dir);
2485 }
2486
2487 brelse(orphan_dir_bh);
2488
2489 return ret;
2490 }
2491
2492 int ocfs2_create_inode_in_orphan(struct inode *dir,
2493 int mode,
2494 struct inode **new_inode)
2495 {
2496 int status, did_quota_inode = 0;
2497 struct inode *inode = NULL;
2498 struct inode *orphan_dir = NULL;
2499 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2500 handle_t *handle = NULL;
2501 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2502 struct buffer_head *parent_di_bh = NULL;
2503 struct buffer_head *new_di_bh = NULL;
2504 struct ocfs2_alloc_context *inode_ac = NULL;
2505 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2506 u64 di_blkno, suballoc_loc;
2507 u16 suballoc_bit;
2508
2509 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2510 if (status < 0) {
2511 if (status != -ENOENT)
2512 mlog_errno(status);
2513 return status;
2514 }
2515
2516 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2517 orphan_name, &orphan_dir,
2518 &di_blkno, &orphan_insert, &inode_ac);
2519 if (status < 0) {
2520 if (status != -ENOSPC)
2521 mlog_errno(status);
2522 goto leave;
2523 }
2524
2525 inode = ocfs2_get_init_inode(dir, mode);
2526 if (IS_ERR(inode)) {
2527 status = PTR_ERR(inode);
2528 inode = NULL;
2529 mlog_errno(status);
2530 goto leave;
2531 }
2532
2533 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2534 if (IS_ERR(handle)) {
2535 status = PTR_ERR(handle);
2536 handle = NULL;
2537 mlog_errno(status);
2538 goto leave;
2539 }
2540
2541 status = dquot_alloc_inode(inode);
2542 if (status)
2543 goto leave;
2544 did_quota_inode = 1;
2545
2546 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2547 &suballoc_loc,
2548 &suballoc_bit, di_blkno);
2549 if (status < 0) {
2550 mlog_errno(status);
2551 goto leave;
2552 }
2553
2554 clear_nlink(inode);
2555 /* do the real work now. */
2556 status = __ocfs2_mknod_locked(dir, inode,
2557 0, &new_di_bh, parent_di_bh, handle,
2558 inode_ac, di_blkno, suballoc_loc,
2559 suballoc_bit);
2560 if (status < 0) {
2561 mlog_errno(status);
2562 goto leave;
2563 }
2564
2565 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2566 &orphan_insert, orphan_dir, false);
2567 if (status < 0) {
2568 mlog_errno(status);
2569 goto leave;
2570 }
2571
2572 /* get open lock so that only nodes can't remove it from orphan dir. */
2573 status = ocfs2_open_lock(inode);
2574 if (status < 0)
2575 mlog_errno(status);
2576
2577 insert_inode_hash(inode);
2578 leave:
2579 if (status < 0 && did_quota_inode)
2580 dquot_free_inode(inode);
2581 if (handle)
2582 ocfs2_commit_trans(osb, handle);
2583
2584 if (orphan_dir) {
2585 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2586 ocfs2_inode_unlock(orphan_dir, 1);
2587 inode_unlock(orphan_dir);
2588 iput(orphan_dir);
2589 }
2590
2591 if ((status < 0) && inode) {
2592 clear_nlink(inode);
2593 iput(inode);
2594 }
2595
2596 if (inode_ac)
2597 ocfs2_free_alloc_context(inode_ac);
2598
2599 brelse(new_di_bh);
2600
2601 if (!status)
2602 *new_inode = inode;
2603
2604 ocfs2_free_dir_lookup_result(&orphan_insert);
2605
2606 ocfs2_inode_unlock(dir, 1);
2607 brelse(parent_di_bh);
2608 return status;
2609 }
2610
2611 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
2612 struct inode *inode)
2613 {
2614 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2615 struct inode *orphan_dir_inode = NULL;
2616 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2617 struct buffer_head *di_bh = NULL;
2618 int status = 0;
2619 handle_t *handle = NULL;
2620 struct ocfs2_dinode *di = NULL;
2621
2622 status = ocfs2_inode_lock(inode, &di_bh, 1);
2623 if (status < 0) {
2624 mlog_errno(status);
2625 goto bail;
2626 }
2627
2628 di = (struct ocfs2_dinode *) di_bh->b_data;
2629 /*
2630 * Another append dio crashed?
2631 * If so, manually recover it first.
2632 */
2633 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
2634 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode));
2635 if (status < 0) {
2636 if (status != -ENOSPC)
2637 mlog_errno(status);
2638 goto bail_unlock_inode;
2639 }
2640
2641 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0);
2642 if (status < 0) {
2643 mlog_errno(status);
2644 goto bail_unlock_inode;
2645 }
2646 }
2647
2648 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
2649 OCFS2_I(inode)->ip_blkno,
2650 orphan_name,
2651 &orphan_insert,
2652 true);
2653 if (status < 0) {
2654 mlog_errno(status);
2655 goto bail_unlock_inode;
2656 }
2657
2658 handle = ocfs2_start_trans(osb,
2659 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS);
2660 if (IS_ERR(handle)) {
2661 status = PTR_ERR(handle);
2662 goto bail_unlock_orphan;
2663 }
2664
2665 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
2666 &orphan_insert, orphan_dir_inode, true);
2667 if (status)
2668 mlog_errno(status);
2669
2670 ocfs2_commit_trans(osb, handle);
2671
2672 bail_unlock_orphan:
2673 ocfs2_inode_unlock(orphan_dir_inode, 1);
2674 inode_unlock(orphan_dir_inode);
2675 iput(orphan_dir_inode);
2676
2677 ocfs2_free_dir_lookup_result(&orphan_insert);
2678
2679 bail_unlock_inode:
2680 ocfs2_inode_unlock(inode, 1);
2681 brelse(di_bh);
2682
2683 bail:
2684 return status;
2685 }
2686
2687 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
2688 struct inode *inode, struct buffer_head *di_bh,
2689 int update_isize, loff_t end)
2690 {
2691 struct inode *orphan_dir_inode = NULL;
2692 struct buffer_head *orphan_dir_bh = NULL;
2693 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2694 handle_t *handle = NULL;
2695 int status = 0;
2696
2697 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2698 ORPHAN_DIR_SYSTEM_INODE,
2699 le16_to_cpu(di->i_dio_orphaned_slot));
2700 if (!orphan_dir_inode) {
2701 status = -ENOENT;
2702 mlog_errno(status);
2703 goto bail;
2704 }
2705
2706 inode_lock(orphan_dir_inode);
2707 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2708 if (status < 0) {
2709 inode_unlock(orphan_dir_inode);
2710 iput(orphan_dir_inode);
2711 mlog_errno(status);
2712 goto bail;
2713 }
2714
2715 handle = ocfs2_start_trans(osb,
2716 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS);
2717 if (IS_ERR(handle)) {
2718 status = PTR_ERR(handle);
2719 goto bail_unlock_orphan;
2720 }
2721
2722 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)));
2723
2724 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
2725 inode, orphan_dir_bh, true);
2726 if (status < 0) {
2727 mlog_errno(status);
2728 goto bail_commit;
2729 }
2730
2731 status = ocfs2_journal_access_di(handle,
2732 INODE_CACHE(inode),
2733 di_bh,
2734 OCFS2_JOURNAL_ACCESS_WRITE);
2735 if (status < 0) {
2736 mlog_errno(status);
2737 goto bail_commit;
2738 }
2739
2740 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2741 di->i_dio_orphaned_slot = 0;
2742
2743 if (update_isize) {
2744 status = ocfs2_set_inode_size(handle, inode, di_bh, end);
2745 if (status)
2746 mlog_errno(status);
2747 } else
2748 ocfs2_journal_dirty(handle, di_bh);
2749
2750 bail_commit:
2751 ocfs2_commit_trans(osb, handle);
2752
2753 bail_unlock_orphan:
2754 ocfs2_inode_unlock(orphan_dir_inode, 1);
2755 inode_unlock(orphan_dir_inode);
2756 brelse(orphan_dir_bh);
2757 iput(orphan_dir_inode);
2758
2759 bail:
2760 return status;
2761 }
2762
2763 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2764 struct inode *inode,
2765 struct dentry *dentry)
2766 {
2767 int status = 0;
2768 struct buffer_head *parent_di_bh = NULL;
2769 handle_t *handle = NULL;
2770 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2771 struct ocfs2_dinode *dir_di, *di;
2772 struct inode *orphan_dir_inode = NULL;
2773 struct buffer_head *orphan_dir_bh = NULL;
2774 struct buffer_head *di_bh = NULL;
2775 struct ocfs2_dir_lookup_result lookup = { NULL, };
2776
2777 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2778 dentry->d_name.len, dentry->d_name.name,
2779 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2780 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2781
2782 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2783 if (status < 0) {
2784 if (status != -ENOENT)
2785 mlog_errno(status);
2786 return status;
2787 }
2788
2789 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2790 if (!dir_di->i_links_count) {
2791 /* can't make a file in a deleted directory. */
2792 status = -ENOENT;
2793 goto leave;
2794 }
2795
2796 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2797 dentry->d_name.len);
2798 if (status)
2799 goto leave;
2800
2801 /* get a spot inside the dir. */
2802 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2803 dentry->d_name.name,
2804 dentry->d_name.len, &lookup);
2805 if (status < 0) {
2806 mlog_errno(status);
2807 goto leave;
2808 }
2809
2810 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2811 ORPHAN_DIR_SYSTEM_INODE,
2812 osb->slot_num);
2813 if (!orphan_dir_inode) {
2814 status = -ENOENT;
2815 mlog_errno(status);
2816 goto leave;
2817 }
2818
2819 inode_lock(orphan_dir_inode);
2820
2821 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2822 if (status < 0) {
2823 mlog_errno(status);
2824 inode_unlock(orphan_dir_inode);
2825 iput(orphan_dir_inode);
2826 goto leave;
2827 }
2828
2829 status = ocfs2_read_inode_block(inode, &di_bh);
2830 if (status < 0) {
2831 mlog_errno(status);
2832 goto orphan_unlock;
2833 }
2834
2835 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2836 if (IS_ERR(handle)) {
2837 status = PTR_ERR(handle);
2838 handle = NULL;
2839 mlog_errno(status);
2840 goto orphan_unlock;
2841 }
2842
2843 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2844 di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2845 if (status < 0) {
2846 mlog_errno(status);
2847 goto out_commit;
2848 }
2849
2850 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2851 orphan_dir_bh, false);
2852 if (status < 0) {
2853 mlog_errno(status);
2854 goto out_commit;
2855 }
2856
2857 di = (struct ocfs2_dinode *)di_bh->b_data;
2858 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2859 di->i_orphaned_slot = 0;
2860 set_nlink(inode, 1);
2861 ocfs2_set_links_count(di, inode->i_nlink);
2862 ocfs2_update_inode_fsync_trans(handle, inode, 1);
2863 ocfs2_journal_dirty(handle, di_bh);
2864
2865 status = ocfs2_add_entry(handle, dentry, inode,
2866 OCFS2_I(inode)->ip_blkno, parent_di_bh,
2867 &lookup);
2868 if (status < 0) {
2869 mlog_errno(status);
2870 goto out_commit;
2871 }
2872
2873 status = ocfs2_dentry_attach_lock(dentry, inode,
2874 OCFS2_I(dir)->ip_blkno);
2875 if (status) {
2876 mlog_errno(status);
2877 goto out_commit;
2878 }
2879
2880 d_instantiate(dentry, inode);
2881 status = 0;
2882 out_commit:
2883 ocfs2_commit_trans(osb, handle);
2884 orphan_unlock:
2885 ocfs2_inode_unlock(orphan_dir_inode, 1);
2886 inode_unlock(orphan_dir_inode);
2887 iput(orphan_dir_inode);
2888 leave:
2889
2890 ocfs2_inode_unlock(dir, 1);
2891
2892 brelse(di_bh);
2893 brelse(parent_di_bh);
2894 brelse(orphan_dir_bh);
2895
2896 ocfs2_free_dir_lookup_result(&lookup);
2897
2898 if (status)
2899 mlog_errno(status);
2900
2901 return status;
2902 }
2903
2904 const struct inode_operations ocfs2_dir_iops = {
2905 .create = ocfs2_create,
2906 .lookup = ocfs2_lookup,
2907 .link = ocfs2_link,
2908 .unlink = ocfs2_unlink,
2909 .rmdir = ocfs2_unlink,
2910 .symlink = ocfs2_symlink,
2911 .mkdir = ocfs2_mkdir,
2912 .mknod = ocfs2_mknod,
2913 .rename = ocfs2_rename,
2914 .setattr = ocfs2_setattr,
2915 .getattr = ocfs2_getattr,
2916 .permission = ocfs2_permission,
2917 .listxattr = ocfs2_listxattr,
2918 .fiemap = ocfs2_fiemap,
2919 .get_acl = ocfs2_iop_get_acl,
2920 .set_acl = ocfs2_iop_set_acl,
2921 };
Michael's Linux tree.