1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * namei.c
4 *
5 * Create and rename file, directory, symlinks
6 *
7 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
8 *
9 * Portions of this code from linux/fs/ext3/dir.c
10 *
11 * Copyright (C) 1992, 1993, 1994, 1995
12 * Remy Card (card@masi.ibp.fr)
13 * Laboratoire MASI - Institut Blaise pascal
14 * Universite Pierre et Marie Curie (Paris VI)
15 *
16 * from
17 *
18 * linux/fs/minix/dir.c
19 *
20 * Copyright (C) 1991, 1992 Linux Torvalds
21 */
22
23 #include <linux/fs.h>
24 #include <linux/types.h>
25 #include <linux/slab.h>
26 #include <linux/highmem.h>
27 #include <linux/quotaops.h>
28 #include <linux/iversion.h>
29
30 #include <cluster/masklog.h>
31
32 #include "ocfs2.h"
33
34 #include "alloc.h"
35 #include "dcache.h"
36 #include "dir.h"
37 #include "dlmglue.h"
38 #include "extent_map.h"
39 #include "file.h"
40 #include "inode.h"
41 #include "journal.h"
42 #include "namei.h"
43 #include "suballoc.h"
44 #include "super.h"
45 #include "symlink.h"
46 #include "sysfile.h"
47 #include "uptodate.h"
48 #include "xattr.h"
49 #include "acl.h"
50 #include "ocfs2_trace.h"
51 #include "ioctl.h"
52
53 #include "buffer_head_io.h"
54
55 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
56 struct inode *dir,
57 struct inode *inode,
58 dev_t dev,
59 struct buffer_head **new_fe_bh,
60 struct buffer_head *parent_fe_bh,
61 handle_t *handle,
62 struct ocfs2_alloc_context *inode_ac);
63
64 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
65 struct inode **ret_orphan_dir,
66 u64 blkno,
67 char *name,
68 struct ocfs2_dir_lookup_result *lookup,
69 bool dio);
70
71 static int ocfs2_orphan_add(struct ocfs2_super *osb,
72 handle_t *handle,
73 struct inode *inode,
74 struct buffer_head *fe_bh,
75 char *name,
76 struct ocfs2_dir_lookup_result *lookup,
77 struct inode *orphan_dir_inode,
78 bool dio);
79
80 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
81 handle_t *handle,
82 struct inode *inode,
83 const char *symname);
84
85 static int ocfs2_double_lock(struct ocfs2_super *osb,
86 struct buffer_head **bh1,
87 struct inode *inode1,
88 struct buffer_head **bh2,
89 struct inode *inode2,
90 int rename);
91
92 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2);
93 /* An orphan dir name is an 8 byte value, printed as a hex string */
94 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
95
96 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
97 unsigned int flags)
98 {
99 int status;
100 u64 blkno;
101 struct inode *inode = NULL;
102 struct dentry *ret;
103 struct ocfs2_inode_info *oi;
104
105 trace_ocfs2_lookup(dir, dentry, dentry->d_name.len,
106 dentry->d_name.name,
107 (unsigned long long)OCFS2_I(dir)->ip_blkno, 0);
108
109 if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
110 ret = ERR_PTR(-ENAMETOOLONG);
111 goto bail;
112 }
113
114 status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
115 if (status < 0) {
116 if (status != -ENOENT)
117 mlog_errno(status);
118 ret = ERR_PTR(status);
119 goto bail;
120 }
121
122 status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
123 dentry->d_name.len, &blkno);
124 if (status < 0)
125 goto bail_add;
126
127 inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
128 if (IS_ERR(inode)) {
129 ret = ERR_PTR(-EACCES);
130 goto bail_unlock;
131 }
132
133 oi = OCFS2_I(inode);
134 /* Clear any orphaned state... If we were able to look up the
135 * inode from a directory, it certainly can't be orphaned. We
136 * might have the bad state from a node which intended to
137 * orphan this inode but crashed before it could commit the
138 * unlink. */
139 spin_lock(&oi->ip_lock);
140 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
141 spin_unlock(&oi->ip_lock);
142
143 bail_add:
144 ret = d_splice_alias(inode, dentry);
145
146 if (inode) {
147 /*
148 * If d_splice_alias() finds a DCACHE_DISCONNECTED
149 * dentry, it will d_move() it on top of ourse. The
150 * return value will indicate this however, so in
151 * those cases, we switch them around for the locking
152 * code.
153 *
154 * NOTE: This dentry already has ->d_op set from
155 * ocfs2_get_parent() and ocfs2_get_dentry()
156 */
157 if (!IS_ERR_OR_NULL(ret))
158 dentry = ret;
159
160 status = ocfs2_dentry_attach_lock(dentry, inode,
161 OCFS2_I(dir)->ip_blkno);
162 if (status) {
163 mlog_errno(status);
164 ret = ERR_PTR(status);
165 goto bail_unlock;
166 }
167 } else
168 ocfs2_dentry_attach_gen(dentry);
169
170 bail_unlock:
171 /* Don't drop the cluster lock until *after* the d_add --
172 * unlink on another node will message us to remove that
173 * dentry under this lock so otherwise we can race this with
174 * the downconvert thread and have a stale dentry. */
175 ocfs2_inode_unlock(dir, 0);
176
177 bail:
178
179 trace_ocfs2_lookup_ret(ret);
180
181 return ret;
182 }
183
184 static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode)
185 {
186 struct inode *inode;
187 int status;
188
189 inode = new_inode(dir->i_sb);
190 if (!inode) {
191 mlog(ML_ERROR, "new_inode failed!\n");
192 return ERR_PTR(-ENOMEM);
193 }
194
195 /* populate as many fields early on as possible - many of
196 * these are used by the support functions here and in
197 * callers. */
198 if (S_ISDIR(mode))
199 set_nlink(inode, 2);
200 mode = mode_strip_sgid(&nop_mnt_idmap, dir, mode);
201 inode_init_owner(&nop_mnt_idmap, 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 mnt_idmap *idmap,
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 ocfs2_dinode *fe = NULL;
236 struct buffer_head *new_fe_bh = NULL;
237 struct inode *inode = NULL;
238 struct ocfs2_alloc_context *inode_ac = NULL;
239 struct ocfs2_alloc_context *data_ac = NULL;
240 struct ocfs2_alloc_context *meta_ac = NULL;
241 int want_clusters = 0;
242 int want_meta = 0;
243 int xattr_credits = 0;
244 struct ocfs2_security_xattr_info si = {
245 .name = NULL,
246 .enable = 1,
247 };
248 int did_quota_inode = 0;
249 struct ocfs2_dir_lookup_result lookup = { NULL, };
250 sigset_t oldset;
251 int did_block_signals = 0;
252 struct ocfs2_dentry_lock *dl = NULL;
253
254 trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
255 (unsigned long long)OCFS2_I(dir)->ip_blkno,
256 (unsigned long)dev, mode);
257
258 status = dquot_initialize(dir);
259 if (status) {
260 mlog_errno(status);
261 return status;
262 }
263
264 /* get our super block */
265 osb = OCFS2_SB(dir->i_sb);
266
267 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
268 if (status < 0) {
269 if (status != -ENOENT)
270 mlog_errno(status);
271 return status;
272 }
273
274 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
275 status = -EMLINK;
276 goto leave;
277 }
278
279 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
280 if (!ocfs2_read_links_count(dirfe)) {
281 /* can't make a file in a deleted directory. */
282 status = -ENOENT;
283 goto leave;
284 }
285
286 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
287 dentry->d_name.len);
288 if (status)
289 goto leave;
290
291 /* get a spot inside the dir. */
292 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
293 dentry->d_name.name,
294 dentry->d_name.len, &lookup);
295 if (status < 0) {
296 mlog_errno(status);
297 goto leave;
298 }
299
300 /* reserve an inode spot */
301 status = ocfs2_reserve_new_inode(osb, &inode_ac);
302 if (status < 0) {
303 if (status != -ENOSPC)
304 mlog_errno(status);
305 goto leave;
306 }
307
308 inode = ocfs2_get_init_inode(dir, mode);
309 if (IS_ERR(inode)) {
310 status = PTR_ERR(inode);
311 inode = NULL;
312 mlog_errno(status);
313 goto leave;
314 }
315
316 /* get security xattr */
317 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
318 if (status) {
319 if (status == -EOPNOTSUPP)
320 si.enable = 0;
321 else {
322 mlog_errno(status);
323 goto leave;
324 }
325 }
326
327 /* calculate meta data/clusters for setting security and acl xattr */
328 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
329 &si, &want_clusters,
330 &xattr_credits, &want_meta);
331 if (status < 0) {
332 mlog_errno(status);
333 goto leave;
334 }
335
336 /* Reserve a cluster if creating an extent based directory. */
337 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
338 want_clusters += 1;
339
340 /* Dir indexing requires extra space as well */
341 if (ocfs2_supports_indexed_dirs(osb))
342 want_meta++;
343 }
344
345 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
346 if (status < 0) {
347 if (status != -ENOSPC)
348 mlog_errno(status);
349 goto leave;
350 }
351
352 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
353 if (status < 0) {
354 if (status != -ENOSPC)
355 mlog_errno(status);
356 goto leave;
357 }
358
359 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
360 S_ISDIR(mode),
361 xattr_credits));
362 if (IS_ERR(handle)) {
363 status = PTR_ERR(handle);
364 handle = NULL;
365 mlog_errno(status);
366 goto leave;
367 }
368
369 /* Starting to change things, restart is no longer possible. */
370 ocfs2_block_signals(&oldset);
371 did_block_signals = 1;
372
373 status = dquot_alloc_inode(inode);
374 if (status)
375 goto leave;
376 did_quota_inode = 1;
377
378 /* do the real work now. */
379 status = ocfs2_mknod_locked(osb, dir, inode, dev,
380 &new_fe_bh, parent_fe_bh, handle,
381 inode_ac);
382 if (status < 0) {
383 mlog_errno(status);
384 goto leave;
385 }
386
387 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
388 if (S_ISDIR(mode)) {
389 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
390 new_fe_bh, data_ac, meta_ac);
391 if (status < 0) {
392 mlog_errno(status);
393 goto leave;
394 }
395
396 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
397 parent_fe_bh,
398 OCFS2_JOURNAL_ACCESS_WRITE);
399 if (status < 0) {
400 mlog_errno(status);
401 goto leave;
402 }
403 ocfs2_add_links_count(dirfe, 1);
404 ocfs2_journal_dirty(handle, parent_fe_bh);
405 inc_nlink(dir);
406 }
407
408 status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
409 meta_ac, data_ac);
410
411 if (status < 0) {
412 mlog_errno(status);
413 goto roll_back;
414 }
415
416 if (si.enable) {
417 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
418 meta_ac, data_ac);
419 if (status < 0) {
420 mlog_errno(status);
421 goto roll_back;
422 }
423 }
424
425 /*
426 * Do this before adding the entry to the directory. We add
427 * also set d_op after success so that ->d_iput() will cleanup
428 * the dentry lock even if ocfs2_add_entry() fails below.
429 */
430 status = ocfs2_dentry_attach_lock(dentry, inode,
431 OCFS2_I(dir)->ip_blkno);
432 if (status) {
433 mlog_errno(status);
434 goto roll_back;
435 }
436
437 dl = dentry->d_fsdata;
438
439 status = ocfs2_add_entry(handle, dentry, inode,
440 OCFS2_I(inode)->ip_blkno, parent_fe_bh,
441 &lookup);
442 if (status < 0) {
443 mlog_errno(status);
444 goto roll_back;
445 }
446
447 insert_inode_hash(inode);
448 d_instantiate(dentry, inode);
449 status = 0;
450
451 roll_back:
452 if (status < 0 && S_ISDIR(mode)) {
453 ocfs2_add_links_count(dirfe, -1);
454 drop_nlink(dir);
455 }
456
457 leave:
458 if (status < 0 && did_quota_inode)
459 dquot_free_inode(inode);
460 if (handle) {
461 if (status < 0 && fe)
462 ocfs2_set_links_count(fe, 0);
463 ocfs2_commit_trans(osb, handle);
464 }
465
466 ocfs2_inode_unlock(dir, 1);
467 if (did_block_signals)
468 ocfs2_unblock_signals(&oldset);
469
470 brelse(new_fe_bh);
471 brelse(parent_fe_bh);
472 kfree(si.value);
473
474 ocfs2_free_dir_lookup_result(&lookup);
475
476 if (inode_ac)
477 ocfs2_free_alloc_context(inode_ac);
478
479 if (data_ac)
480 ocfs2_free_alloc_context(data_ac);
481
482 if (meta_ac)
483 ocfs2_free_alloc_context(meta_ac);
484
485 /*
486 * We should call iput after the i_rwsem of the bitmap been
487 * unlocked in ocfs2_free_alloc_context, or the
488 * ocfs2_delete_inode will mutex_lock again.
489 */
490 if ((status < 0) && inode) {
491 if (dl)
492 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
493
494 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
495 clear_nlink(inode);
496 iput(inode);
497 }
498
499 if (status)
500 mlog_errno(status);
501
502 return status;
503 }
504
505 static int __ocfs2_mknod_locked(struct inode *dir,
506 struct inode *inode,
507 dev_t dev,
508 struct buffer_head **new_fe_bh,
509 struct buffer_head *parent_fe_bh,
510 handle_t *handle,
511 struct ocfs2_alloc_context *inode_ac,
512 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
513 {
514 int status = 0;
515 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
516 struct ocfs2_dinode *fe = NULL;
517 struct ocfs2_extent_list *fel;
518 u16 feat;
519 struct ocfs2_inode_info *oi = OCFS2_I(inode);
520 struct timespec64 ts;
521
522 *new_fe_bh = NULL;
523
524 /* populate as many fields early on as possible - many of
525 * these are used by the support functions here and in
526 * callers. */
527 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
528 oi->ip_blkno = fe_blkno;
529 spin_lock(&osb->osb_lock);
530 inode->i_generation = osb->s_next_generation++;
531 spin_unlock(&osb->osb_lock);
532
533 *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
534 if (!*new_fe_bh) {
535 status = -ENOMEM;
536 mlog_errno(status);
537 goto leave;
538 }
539 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
540
541 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
542 *new_fe_bh,
543 OCFS2_JOURNAL_ACCESS_CREATE);
544 if (status < 0) {
545 mlog_errno(status);
546 goto leave;
547 }
548
549 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
550 memset(fe, 0, osb->sb->s_blocksize);
551
552 fe->i_generation = cpu_to_le32(inode->i_generation);
553 fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
554 fe->i_blkno = cpu_to_le64(fe_blkno);
555 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
556 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
557 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
558 fe->i_uid = cpu_to_le32(i_uid_read(inode));
559 fe->i_gid = cpu_to_le32(i_gid_read(inode));
560 fe->i_mode = cpu_to_le16(inode->i_mode);
561 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
562 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
563
564 ocfs2_set_links_count(fe, inode->i_nlink);
565
566 fe->i_last_eb_blk = 0;
567 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
568 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
569 ktime_get_coarse_real_ts64(&ts);
570 fe->i_atime = fe->i_ctime = fe->i_mtime =
571 cpu_to_le64(ts.tv_sec);
572 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
573 cpu_to_le32(ts.tv_nsec);
574 fe->i_dtime = 0;
575
576 /*
577 * If supported, directories start with inline data. If inline
578 * isn't supported, but indexing is, we start them as indexed.
579 */
580 feat = le16_to_cpu(fe->i_dyn_features);
581 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
582 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
583
584 fe->id2.i_data.id_count = cpu_to_le16(
585 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
586 } else {
587 fel = &fe->id2.i_list;
588 fel->l_tree_depth = 0;
589 fel->l_next_free_rec = 0;
590 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
591 }
592
593 ocfs2_journal_dirty(handle, *new_fe_bh);
594
595 ocfs2_populate_inode(inode, fe, 1);
596 ocfs2_ci_set_new(osb, INODE_CACHE(inode));
597 if (!ocfs2_mount_local(osb)) {
598 status = ocfs2_create_new_inode_locks(inode);
599 if (status < 0)
600 mlog_errno(status);
601 }
602
603 ocfs2_update_inode_fsync_trans(handle, inode, 1);
604
605 leave:
606 if (status < 0) {
607 if (*new_fe_bh) {
608 brelse(*new_fe_bh);
609 *new_fe_bh = NULL;
610 }
611 }
612
613 if (status)
614 mlog_errno(status);
615 return status;
616 }
617
618 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
619 struct inode *dir,
620 struct inode *inode,
621 dev_t dev,
622 struct buffer_head **new_fe_bh,
623 struct buffer_head *parent_fe_bh,
624 handle_t *handle,
625 struct ocfs2_alloc_context *inode_ac)
626 {
627 int status = 0;
628 u64 suballoc_loc, fe_blkno = 0;
629 u16 suballoc_bit;
630
631 *new_fe_bh = NULL;
632
633 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
634 inode_ac, &suballoc_loc,
635 &suballoc_bit, &fe_blkno);
636 if (status < 0) {
637 mlog_errno(status);
638 return status;
639 }
640
641 return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
642 parent_fe_bh, handle, inode_ac,
643 fe_blkno, suballoc_loc, suballoc_bit);
644 }
645
646 static int ocfs2_mkdir(struct mnt_idmap *idmap,
647 struct inode *dir,
648 struct dentry *dentry,
649 umode_t mode)
650 {
651 int ret;
652
653 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
654 OCFS2_I(dir)->ip_blkno, mode);
655 ret = ocfs2_mknod(&nop_mnt_idmap, dir, dentry, mode | S_IFDIR, 0);
656 if (ret)
657 mlog_errno(ret);
658
659 return ret;
660 }
661
662 static int ocfs2_create(struct mnt_idmap *idmap,
663 struct inode *dir,
664 struct dentry *dentry,
665 umode_t mode,
666 bool excl)
667 {
668 int ret;
669
670 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
671 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
672 ret = ocfs2_mknod(&nop_mnt_idmap, dir, dentry, mode | S_IFREG, 0);
673 if (ret)
674 mlog_errno(ret);
675
676 return ret;
677 }
678
679 static int ocfs2_link(struct dentry *old_dentry,
680 struct inode *dir,
681 struct dentry *dentry)
682 {
683 handle_t *handle;
684 struct inode *inode = d_inode(old_dentry);
685 struct inode *old_dir = d_inode(old_dentry->d_parent);
686 int err;
687 struct buffer_head *fe_bh = NULL;
688 struct buffer_head *old_dir_bh = NULL;
689 struct buffer_head *parent_fe_bh = NULL;
690 struct ocfs2_dinode *fe = NULL;
691 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
692 struct ocfs2_dir_lookup_result lookup = { NULL, };
693 sigset_t oldset;
694 u64 old_de_ino;
695
696 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
697 old_dentry->d_name.len, old_dentry->d_name.name,
698 dentry->d_name.len, dentry->d_name.name);
699
700 if (S_ISDIR(inode->i_mode))
701 return -EPERM;
702
703 err = dquot_initialize(dir);
704 if (err) {
705 mlog_errno(err);
706 return err;
707 }
708
709 err = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
710 &parent_fe_bh, dir, 0);
711 if (err < 0) {
712 if (err != -ENOENT)
713 mlog_errno(err);
714 return err;
715 }
716
717 /* make sure both dirs have bhs
718 * get an extra ref on old_dir_bh if old==new */
719 if (!parent_fe_bh) {
720 if (old_dir_bh) {
721 parent_fe_bh = old_dir_bh;
722 get_bh(parent_fe_bh);
723 } else {
724 mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str);
725 err = -EIO;
726 goto out;
727 }
728 }
729
730 if (!dir->i_nlink) {
731 err = -ENOENT;
732 goto out;
733 }
734
735 err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
736 old_dentry->d_name.len, &old_de_ino);
737 if (err) {
738 err = -ENOENT;
739 goto out;
740 }
741
742 /*
743 * Check whether another node removed the source inode while we
744 * were in the vfs.
745 */
746 if (old_de_ino != OCFS2_I(inode)->ip_blkno) {
747 err = -ENOENT;
748 goto out;
749 }
750
751 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
752 dentry->d_name.len);
753 if (err)
754 goto out;
755
756 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
757 dentry->d_name.name,
758 dentry->d_name.len, &lookup);
759 if (err < 0) {
760 mlog_errno(err);
761 goto out;
762 }
763
764 err = ocfs2_inode_lock(inode, &fe_bh, 1);
765 if (err < 0) {
766 if (err != -ENOENT)
767 mlog_errno(err);
768 goto out;
769 }
770
771 fe = (struct ocfs2_dinode *) fe_bh->b_data;
772 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
773 err = -EMLINK;
774 goto out_unlock_inode;
775 }
776
777 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
778 if (IS_ERR(handle)) {
779 err = PTR_ERR(handle);
780 handle = NULL;
781 mlog_errno(err);
782 goto out_unlock_inode;
783 }
784
785 /* Starting to change things, restart is no longer possible. */
786 ocfs2_block_signals(&oldset);
787
788 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
789 OCFS2_JOURNAL_ACCESS_WRITE);
790 if (err < 0) {
791 mlog_errno(err);
792 goto out_commit;
793 }
794
795 inc_nlink(inode);
796 inode_set_ctime_current(inode);
797 ocfs2_set_links_count(fe, inode->i_nlink);
798 fe->i_ctime = cpu_to_le64(inode_get_ctime_sec(inode));
799 fe->i_ctime_nsec = cpu_to_le32(inode_get_ctime_nsec(inode));
800 ocfs2_update_inode_fsync_trans(handle, inode, 0);
801 ocfs2_journal_dirty(handle, fe_bh);
802
803 err = ocfs2_add_entry(handle, dentry, inode,
804 OCFS2_I(inode)->ip_blkno,
805 parent_fe_bh, &lookup);
806 if (err) {
807 ocfs2_add_links_count(fe, -1);
808 drop_nlink(inode);
809 mlog_errno(err);
810 goto out_commit;
811 }
812
813 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
814 if (err) {
815 mlog_errno(err);
816 goto out_commit;
817 }
818
819 ihold(inode);
820 d_instantiate(dentry, inode);
821
822 out_commit:
823 ocfs2_commit_trans(osb, handle);
824 ocfs2_unblock_signals(&oldset);
825 out_unlock_inode:
826 ocfs2_inode_unlock(inode, 1);
827
828 out:
829 ocfs2_double_unlock(old_dir, dir);
830
831 brelse(fe_bh);
832 brelse(parent_fe_bh);
833 brelse(old_dir_bh);
834
835 ocfs2_free_dir_lookup_result(&lookup);
836
837 if (err)
838 mlog_errno(err);
839
840 return err;
841 }
842
843 /*
844 * Takes and drops an exclusive lock on the given dentry. This will
845 * force other nodes to drop it.
846 */
847 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
848 {
849 int ret;
850
851 ret = ocfs2_dentry_lock(dentry, 1);
852 if (ret)
853 mlog_errno(ret);
854 else
855 ocfs2_dentry_unlock(dentry, 1);
856
857 return ret;
858 }
859
860 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
861 {
862 if (S_ISDIR(inode->i_mode)) {
863 if (inode->i_nlink == 2)
864 return 1;
865 return 0;
866 }
867
868 if (inode->i_nlink == 1)
869 return 1;
870 return 0;
871 }
872
873 static int ocfs2_unlink(struct inode *dir,
874 struct dentry *dentry)
875 {
876 int status;
877 int child_locked = 0;
878 bool is_unlinkable = false;
879 struct inode *inode = d_inode(dentry);
880 struct inode *orphan_dir = NULL;
881 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
882 u64 blkno;
883 struct ocfs2_dinode *fe = NULL;
884 struct buffer_head *fe_bh = NULL;
885 struct buffer_head *parent_node_bh = NULL;
886 handle_t *handle = NULL;
887 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
888 struct ocfs2_dir_lookup_result lookup = { NULL, };
889 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
890
891 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
892 dentry->d_name.name,
893 (unsigned long long)OCFS2_I(dir)->ip_blkno,
894 (unsigned long long)OCFS2_I(inode)->ip_blkno);
895
896 status = dquot_initialize(dir);
897 if (status) {
898 mlog_errno(status);
899 return status;
900 }
901
902 BUG_ON(d_inode(dentry->d_parent) != dir);
903
904 if (inode == osb->root_inode)
905 return -EPERM;
906
907 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
908 OI_LS_PARENT);
909 if (status < 0) {
910 if (status != -ENOENT)
911 mlog_errno(status);
912 return status;
913 }
914
915 status = ocfs2_find_files_on_disk(dentry->d_name.name,
916 dentry->d_name.len, &blkno, dir,
917 &lookup);
918 if (status < 0) {
919 if (status != -ENOENT)
920 mlog_errno(status);
921 goto leave;
922 }
923
924 if (OCFS2_I(inode)->ip_blkno != blkno) {
925 status = -ENOENT;
926
927 trace_ocfs2_unlink_noent(
928 (unsigned long long)OCFS2_I(inode)->ip_blkno,
929 (unsigned long long)blkno,
930 OCFS2_I(inode)->ip_flags);
931 goto leave;
932 }
933
934 status = ocfs2_inode_lock(inode, &fe_bh, 1);
935 if (status < 0) {
936 if (status != -ENOENT)
937 mlog_errno(status);
938 goto leave;
939 }
940 child_locked = 1;
941
942 if (S_ISDIR(inode->i_mode)) {
943 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
944 status = -ENOTEMPTY;
945 goto leave;
946 }
947 }
948
949 status = ocfs2_remote_dentry_delete(dentry);
950 if (status < 0) {
951 /* This remote delete should succeed under all normal
952 * circumstances. */
953 mlog_errno(status);
954 goto leave;
955 }
956
957 if (ocfs2_inode_is_unlinkable(inode)) {
958 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
959 OCFS2_I(inode)->ip_blkno,
960 orphan_name, &orphan_insert,
961 false);
962 if (status < 0) {
963 mlog_errno(status);
964 goto leave;
965 }
966 is_unlinkable = true;
967 }
968
969 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
970 if (IS_ERR(handle)) {
971 status = PTR_ERR(handle);
972 handle = NULL;
973 mlog_errno(status);
974 goto leave;
975 }
976
977 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
978 OCFS2_JOURNAL_ACCESS_WRITE);
979 if (status < 0) {
980 mlog_errno(status);
981 goto leave;
982 }
983
984 fe = (struct ocfs2_dinode *) fe_bh->b_data;
985
986 /* delete the name from the parent dir */
987 status = ocfs2_delete_entry(handle, dir, &lookup);
988 if (status < 0) {
989 mlog_errno(status);
990 goto leave;
991 }
992
993 if (S_ISDIR(inode->i_mode))
994 drop_nlink(inode);
995 drop_nlink(inode);
996 ocfs2_set_links_count(fe, inode->i_nlink);
997 ocfs2_update_inode_fsync_trans(handle, inode, 0);
998 ocfs2_journal_dirty(handle, fe_bh);
999
1000 inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir));
1001 if (S_ISDIR(inode->i_mode))
1002 drop_nlink(dir);
1003
1004 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
1005 if (status < 0) {
1006 mlog_errno(status);
1007 if (S_ISDIR(inode->i_mode))
1008 inc_nlink(dir);
1009 goto leave;
1010 }
1011
1012 if (is_unlinkable) {
1013 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
1014 orphan_name, &orphan_insert, orphan_dir, false);
1015 if (status < 0)
1016 mlog_errno(status);
1017 }
1018
1019 leave:
1020 if (handle)
1021 ocfs2_commit_trans(osb, handle);
1022
1023 if (orphan_dir) {
1024 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1025 ocfs2_inode_unlock(orphan_dir, 1);
1026 inode_unlock(orphan_dir);
1027 iput(orphan_dir);
1028 }
1029
1030 if (child_locked)
1031 ocfs2_inode_unlock(inode, 1);
1032
1033 ocfs2_inode_unlock(dir, 1);
1034
1035 brelse(fe_bh);
1036 brelse(parent_node_bh);
1037
1038 ocfs2_free_dir_lookup_result(&orphan_insert);
1039 ocfs2_free_dir_lookup_result(&lookup);
1040
1041 if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
1042 mlog_errno(status);
1043
1044 return status;
1045 }
1046
1047 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb,
1048 u64 src_inode_no, u64 dest_inode_no)
1049 {
1050 int ret = 0, i = 0;
1051 u64 parent_inode_no = 0;
1052 u64 child_inode_no = src_inode_no;
1053 struct inode *child_inode;
1054
1055 #define MAX_LOOKUP_TIMES 32
1056 while (1) {
1057 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0);
1058 if (IS_ERR(child_inode)) {
1059 ret = PTR_ERR(child_inode);
1060 break;
1061 }
1062
1063 ret = ocfs2_inode_lock(child_inode, NULL, 0);
1064 if (ret < 0) {
1065 iput(child_inode);
1066 if (ret != -ENOENT)
1067 mlog_errno(ret);
1068 break;
1069 }
1070
1071 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2,
1072 &parent_inode_no);
1073 ocfs2_inode_unlock(child_inode, 0);
1074 iput(child_inode);
1075 if (ret < 0) {
1076 ret = -ENOENT;
1077 break;
1078 }
1079
1080 if (parent_inode_no == dest_inode_no) {
1081 ret = 1;
1082 break;
1083 }
1084
1085 if (parent_inode_no == osb->root_inode->i_ino) {
1086 ret = 0;
1087 break;
1088 }
1089
1090 child_inode_no = parent_inode_no;
1091
1092 if (++i >= MAX_LOOKUP_TIMES) {
1093 mlog_ratelimited(ML_NOTICE, "max lookup times reached, "
1094 "filesystem may have nested directories, "
1095 "src inode: %llu, dest inode: %llu.\n",
1096 (unsigned long long)src_inode_no,
1097 (unsigned long long)dest_inode_no);
1098 ret = 0;
1099 break;
1100 }
1101 }
1102
1103 return ret;
1104 }
1105
1106 /*
1107 * The only place this should be used is rename and link!
1108 * if they have the same id, then the 1st one is the only one locked.
1109 */
1110 static int ocfs2_double_lock(struct ocfs2_super *osb,
1111 struct buffer_head **bh1,
1112 struct inode *inode1,
1113 struct buffer_head **bh2,
1114 struct inode *inode2,
1115 int rename)
1116 {
1117 int status;
1118 int inode1_is_ancestor, inode2_is_ancestor;
1119 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
1120 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
1121
1122 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
1123 (unsigned long long)oi2->ip_blkno);
1124
1125 if (*bh1)
1126 *bh1 = NULL;
1127 if (*bh2)
1128 *bh2 = NULL;
1129
1130 /* we always want to lock the one with the lower lockid first.
1131 * and if they are nested, we lock ancestor first */
1132 if (oi1->ip_blkno != oi2->ip_blkno) {
1133 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno,
1134 oi1->ip_blkno);
1135 if (inode1_is_ancestor < 0) {
1136 status = inode1_is_ancestor;
1137 goto bail;
1138 }
1139
1140 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno,
1141 oi2->ip_blkno);
1142 if (inode2_is_ancestor < 0) {
1143 status = inode2_is_ancestor;
1144 goto bail;
1145 }
1146
1147 if ((inode1_is_ancestor == 1) ||
1148 (oi1->ip_blkno < oi2->ip_blkno &&
1149 inode2_is_ancestor == 0)) {
1150 /* switch id1 and id2 around */
1151 swap(bh2, bh1);
1152 swap(inode2, inode1);
1153 }
1154 /* lock id2 */
1155 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1156 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT);
1157 if (status < 0) {
1158 if (status != -ENOENT)
1159 mlog_errno(status);
1160 goto bail;
1161 }
1162 }
1163
1164 /* lock id1 */
1165 status = ocfs2_inode_lock_nested(inode1, bh1, 1,
1166 rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT);
1167 if (status < 0) {
1168 /*
1169 * An error return must mean that no cluster locks
1170 * were held on function exit.
1171 */
1172 if (oi1->ip_blkno != oi2->ip_blkno) {
1173 ocfs2_inode_unlock(inode2, 1);
1174 brelse(*bh2);
1175 *bh2 = NULL;
1176 }
1177
1178 if (status != -ENOENT)
1179 mlog_errno(status);
1180 }
1181
1182 trace_ocfs2_double_lock_end(
1183 (unsigned long long)oi1->ip_blkno,
1184 (unsigned long long)oi2->ip_blkno);
1185
1186 bail:
1187 if (status)
1188 mlog_errno(status);
1189 return status;
1190 }
1191
1192 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1193 {
1194 ocfs2_inode_unlock(inode1, 1);
1195
1196 if (inode1 != inode2)
1197 ocfs2_inode_unlock(inode2, 1);
1198 }
1199
1200 static int ocfs2_rename(struct mnt_idmap *idmap,
1201 struct inode *old_dir,
1202 struct dentry *old_dentry,
1203 struct inode *new_dir,
1204 struct dentry *new_dentry,
1205 unsigned int flags)
1206 {
1207 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1208 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1209 struct inode *old_inode = d_inode(old_dentry);
1210 struct inode *new_inode = d_inode(new_dentry);
1211 struct inode *orphan_dir = NULL;
1212 struct ocfs2_dinode *newfe = NULL;
1213 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1214 struct buffer_head *newfe_bh = NULL;
1215 struct buffer_head *old_inode_bh = NULL;
1216 struct ocfs2_super *osb = NULL;
1217 u64 newfe_blkno, old_de_ino;
1218 handle_t *handle = NULL;
1219 struct buffer_head *old_dir_bh = NULL;
1220 struct buffer_head *new_dir_bh = NULL;
1221 u32 old_dir_nlink = old_dir->i_nlink;
1222 struct ocfs2_dinode *old_di;
1223 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1224 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1225 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1226 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1227 struct ocfs2_dir_lookup_result target_insert = { NULL, };
1228 bool should_add_orphan = false;
1229
1230 if (flags)
1231 return -EINVAL;
1232
1233 /* At some point it might be nice to break this function up a
1234 * bit. */
1235
1236 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1237 old_dentry->d_name.len, old_dentry->d_name.name,
1238 new_dentry->d_name.len, new_dentry->d_name.name);
1239
1240 status = dquot_initialize(old_dir);
1241 if (status) {
1242 mlog_errno(status);
1243 goto bail;
1244 }
1245 status = dquot_initialize(new_dir);
1246 if (status) {
1247 mlog_errno(status);
1248 goto bail;
1249 }
1250
1251 osb = OCFS2_SB(old_dir->i_sb);
1252
1253 if (new_inode) {
1254 if (!igrab(new_inode))
1255 BUG();
1256 }
1257
1258 /* Assume a directory hierarchy thusly:
1259 * a/b/c
1260 * a/d
1261 * a,b,c, and d are all directories.
1262 *
1263 * from cwd of 'a' on both nodes:
1264 * node1: mv b/c d
1265 * node2: mv d b/c
1266 *
1267 * And that's why, just like the VFS, we need a file system
1268 * rename lock. */
1269 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1270 status = ocfs2_rename_lock(osb);
1271 if (status < 0) {
1272 mlog_errno(status);
1273 goto bail;
1274 }
1275 rename_lock = 1;
1276
1277 /* here we cannot guarantee the inodes haven't just been
1278 * changed, so check if they are nested again */
1279 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino,
1280 old_inode->i_ino);
1281 if (status < 0) {
1282 mlog_errno(status);
1283 goto bail;
1284 } else if (status == 1) {
1285 status = -EPERM;
1286 trace_ocfs2_rename_not_permitted(
1287 (unsigned long long)old_inode->i_ino,
1288 (unsigned long long)new_dir->i_ino);
1289 goto bail;
1290 }
1291 }
1292
1293 /* if old and new are the same, this'll just do one lock. */
1294 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1295 &new_dir_bh, new_dir, 1);
1296 if (status < 0) {
1297 mlog_errno(status);
1298 goto bail;
1299 }
1300 parents_locked = 1;
1301
1302 if (!new_dir->i_nlink) {
1303 status = -EACCES;
1304 goto bail;
1305 }
1306
1307 /* make sure both dirs have bhs
1308 * get an extra ref on old_dir_bh if old==new */
1309 if (!new_dir_bh) {
1310 if (old_dir_bh) {
1311 new_dir_bh = old_dir_bh;
1312 get_bh(new_dir_bh);
1313 } else {
1314 mlog(ML_ERROR, "no old_dir_bh!\n");
1315 status = -EIO;
1316 goto bail;
1317 }
1318 }
1319
1320 /*
1321 * Aside from allowing a meta data update, the locking here
1322 * also ensures that the downconvert thread on other nodes
1323 * won't have to concurrently downconvert the inode and the
1324 * dentry locks.
1325 */
1326 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1327 OI_LS_PARENT);
1328 if (status < 0) {
1329 if (status != -ENOENT)
1330 mlog_errno(status);
1331 goto bail;
1332 }
1333 old_child_locked = 1;
1334
1335 status = ocfs2_remote_dentry_delete(old_dentry);
1336 if (status < 0) {
1337 mlog_errno(status);
1338 goto bail;
1339 }
1340
1341 if (S_ISDIR(old_inode->i_mode) && new_dir != old_dir) {
1342 u64 old_inode_parent;
1343
1344 update_dot_dot = 1;
1345 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1346 old_inode,
1347 &old_inode_dot_dot_res);
1348 if (status) {
1349 status = -EIO;
1350 goto bail;
1351 }
1352
1353 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1354 status = -EIO;
1355 goto bail;
1356 }
1357
1358 if (!new_inode && new_dir->i_nlink >= ocfs2_link_max(osb)) {
1359 status = -EMLINK;
1360 goto bail;
1361 }
1362 }
1363
1364 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1365 old_dentry->d_name.len,
1366 &old_de_ino);
1367 if (status) {
1368 status = -ENOENT;
1369 goto bail;
1370 }
1371
1372 /*
1373 * Check for inode number is _not_ due to possible IO errors.
1374 * We might rmdir the source, keep it as pwd of some process
1375 * and merrily kill the link to whatever was created under the
1376 * same name. Goodbye sticky bit ;-<
1377 */
1378 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1379 status = -ENOENT;
1380 goto bail;
1381 }
1382
1383 /* check if the target already exists (in which case we need
1384 * to delete it */
1385 status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1386 new_dentry->d_name.len,
1387 &newfe_blkno, new_dir,
1388 &target_lookup_res);
1389 /* The only error we allow here is -ENOENT because the new
1390 * file not existing is perfectly valid. */
1391 if ((status < 0) && (status != -ENOENT)) {
1392 /* If we cannot find the file specified we should just */
1393 /* return the error... */
1394 mlog_errno(status);
1395 goto bail;
1396 }
1397 if (status == 0)
1398 target_exists = 1;
1399
1400 if (!target_exists && new_inode) {
1401 /*
1402 * Target was unlinked by another node while we were
1403 * waiting to get to ocfs2_rename(). There isn't
1404 * anything we can do here to help the situation, so
1405 * bubble up the appropriate error.
1406 */
1407 status = -ENOENT;
1408 goto bail;
1409 }
1410
1411 /* In case we need to overwrite an existing file, we blow it
1412 * away first */
1413 if (target_exists) {
1414 /* VFS didn't think there existed an inode here, but
1415 * someone else in the cluster must have raced our
1416 * rename to create one. Today we error cleanly, in
1417 * the future we should consider calling iget to build
1418 * a new struct inode for this entry. */
1419 if (!new_inode) {
1420 status = -EACCES;
1421
1422 trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1423 new_dentry->d_name.name);
1424 goto bail;
1425 }
1426
1427 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1428 status = -EACCES;
1429
1430 trace_ocfs2_rename_disagree(
1431 (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1432 (unsigned long long)newfe_blkno,
1433 OCFS2_I(new_inode)->ip_flags);
1434 goto bail;
1435 }
1436
1437 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1438 if (status < 0) {
1439 if (status != -ENOENT)
1440 mlog_errno(status);
1441 goto bail;
1442 }
1443 new_child_locked = 1;
1444
1445 status = ocfs2_remote_dentry_delete(new_dentry);
1446 if (status < 0) {
1447 mlog_errno(status);
1448 goto bail;
1449 }
1450
1451 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1452
1453 trace_ocfs2_rename_over_existing(
1454 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1455 (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1456
1457 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1458 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1459 OCFS2_I(new_inode)->ip_blkno,
1460 orphan_name, &orphan_insert,
1461 false);
1462 if (status < 0) {
1463 mlog_errno(status);
1464 goto bail;
1465 }
1466 should_add_orphan = true;
1467 }
1468 } else {
1469 BUG_ON(d_inode(new_dentry->d_parent) != new_dir);
1470
1471 status = ocfs2_check_dir_for_entry(new_dir,
1472 new_dentry->d_name.name,
1473 new_dentry->d_name.len);
1474 if (status)
1475 goto bail;
1476
1477 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1478 new_dentry->d_name.name,
1479 new_dentry->d_name.len,
1480 &target_insert);
1481 if (status < 0) {
1482 mlog_errno(status);
1483 goto bail;
1484 }
1485 }
1486
1487 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1488 if (IS_ERR(handle)) {
1489 status = PTR_ERR(handle);
1490 handle = NULL;
1491 mlog_errno(status);
1492 goto bail;
1493 }
1494
1495 if (target_exists) {
1496 if (S_ISDIR(new_inode->i_mode)) {
1497 if (new_inode->i_nlink != 2 ||
1498 !ocfs2_empty_dir(new_inode)) {
1499 status = -ENOTEMPTY;
1500 goto bail;
1501 }
1502 }
1503 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1504 newfe_bh,
1505 OCFS2_JOURNAL_ACCESS_WRITE);
1506 if (status < 0) {
1507 mlog_errno(status);
1508 goto bail;
1509 }
1510
1511 /* change the dirent to point to the correct inode */
1512 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1513 old_inode);
1514 if (status < 0) {
1515 mlog_errno(status);
1516 goto bail;
1517 }
1518 inode_inc_iversion(new_dir);
1519
1520 if (S_ISDIR(new_inode->i_mode))
1521 ocfs2_set_links_count(newfe, 0);
1522 else
1523 ocfs2_add_links_count(newfe, -1);
1524 ocfs2_journal_dirty(handle, newfe_bh);
1525 if (should_add_orphan) {
1526 status = ocfs2_orphan_add(osb, handle, new_inode,
1527 newfe_bh, orphan_name,
1528 &orphan_insert, orphan_dir, false);
1529 if (status < 0) {
1530 mlog_errno(status);
1531 goto bail;
1532 }
1533 }
1534 } else {
1535 /* if the name was not found in new_dir, add it now */
1536 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1537 OCFS2_I(old_inode)->ip_blkno,
1538 new_dir_bh, &target_insert);
1539 if (status < 0) {
1540 mlog_errno(status);
1541 goto bail;
1542 }
1543 }
1544
1545 inode_set_ctime_current(old_inode);
1546 mark_inode_dirty(old_inode);
1547
1548 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1549 old_inode_bh,
1550 OCFS2_JOURNAL_ACCESS_WRITE);
1551 if (status >= 0) {
1552 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1553
1554 old_di->i_ctime = cpu_to_le64(inode_get_ctime_sec(old_inode));
1555 old_di->i_ctime_nsec = cpu_to_le32(inode_get_ctime_nsec(old_inode));
1556 ocfs2_journal_dirty(handle, old_inode_bh);
1557 } else
1558 mlog_errno(status);
1559
1560 /*
1561 * Now that the name has been added to new_dir, remove the old name.
1562 *
1563 * We don't keep any directory entry context around until now
1564 * because the insert might have changed the type of directory
1565 * we're dealing with.
1566 */
1567 status = ocfs2_find_entry(old_dentry->d_name.name,
1568 old_dentry->d_name.len, old_dir,
1569 &old_entry_lookup);
1570 if (status) {
1571 if (!is_journal_aborted(osb->journal->j_journal)) {
1572 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1573 "is not deleted.",
1574 new_dentry->d_name.len, new_dentry->d_name.name,
1575 old_dentry->d_name.len, old_dentry->d_name.name);
1576 }
1577 goto bail;
1578 }
1579
1580 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1581 if (status < 0) {
1582 mlog_errno(status);
1583 if (!is_journal_aborted(osb->journal->j_journal)) {
1584 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1585 "is not deleted.",
1586 new_dentry->d_name.len, new_dentry->d_name.name,
1587 old_dentry->d_name.len, old_dentry->d_name.name);
1588 }
1589 goto bail;
1590 }
1591
1592 if (new_inode) {
1593 drop_nlink(new_inode);
1594 inode_set_ctime_current(new_inode);
1595 }
1596 inode_set_mtime_to_ts(old_dir, inode_set_ctime_current(old_dir));
1597
1598 if (update_dot_dot) {
1599 status = ocfs2_update_entry(old_inode, handle,
1600 &old_inode_dot_dot_res, new_dir);
1601 if (status < 0) {
1602 mlog_errno(status);
1603 goto bail;
1604 }
1605 }
1606
1607 if (S_ISDIR(old_inode->i_mode)) {
1608 drop_nlink(old_dir);
1609 if (new_inode) {
1610 drop_nlink(new_inode);
1611 } else {
1612 inc_nlink(new_dir);
1613 mark_inode_dirty(new_dir);
1614 }
1615 }
1616 mark_inode_dirty(old_dir);
1617 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1618 if (new_inode) {
1619 mark_inode_dirty(new_inode);
1620 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1621 }
1622
1623 if (old_dir != new_dir) {
1624 /* Keep the same times on both directories.*/
1625 inode_set_mtime_to_ts(new_dir,
1626 inode_set_ctime_to_ts(new_dir, inode_get_ctime(old_dir)));
1627
1628 /*
1629 * This will also pick up the i_nlink change from the
1630 * block above.
1631 */
1632 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1633 }
1634
1635 if (old_dir_nlink != old_dir->i_nlink) {
1636 if (!old_dir_bh) {
1637 mlog(ML_ERROR, "need to change nlink for old dir "
1638 "%llu from %d to %d but bh is NULL!\n",
1639 (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1640 (int)old_dir_nlink, old_dir->i_nlink);
1641 } else {
1642 struct ocfs2_dinode *fe;
1643 status = ocfs2_journal_access_di(handle,
1644 INODE_CACHE(old_dir),
1645 old_dir_bh,
1646 OCFS2_JOURNAL_ACCESS_WRITE);
1647 if (status < 0) {
1648 mlog_errno(status);
1649 goto bail;
1650 }
1651 fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1652 ocfs2_set_links_count(fe, old_dir->i_nlink);
1653 ocfs2_journal_dirty(handle, old_dir_bh);
1654 }
1655 }
1656 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1657 status = 0;
1658 bail:
1659 if (handle)
1660 ocfs2_commit_trans(osb, handle);
1661
1662 if (orphan_dir) {
1663 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1664 ocfs2_inode_unlock(orphan_dir, 1);
1665 inode_unlock(orphan_dir);
1666 iput(orphan_dir);
1667 }
1668
1669 if (new_child_locked)
1670 ocfs2_inode_unlock(new_inode, 1);
1671
1672 if (old_child_locked)
1673 ocfs2_inode_unlock(old_inode, 1);
1674
1675 if (parents_locked)
1676 ocfs2_double_unlock(old_dir, new_dir);
1677
1678 if (rename_lock)
1679 ocfs2_rename_unlock(osb);
1680
1681 if (new_inode)
1682 sync_mapping_buffers(old_inode->i_mapping);
1683
1684 iput(new_inode);
1685
1686 ocfs2_free_dir_lookup_result(&target_lookup_res);
1687 ocfs2_free_dir_lookup_result(&old_entry_lookup);
1688 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1689 ocfs2_free_dir_lookup_result(&orphan_insert);
1690 ocfs2_free_dir_lookup_result(&target_insert);
1691
1692 brelse(newfe_bh);
1693 brelse(old_inode_bh);
1694 brelse(old_dir_bh);
1695 brelse(new_dir_bh);
1696
1697 if (status)
1698 mlog_errno(status);
1699
1700 return status;
1701 }
1702
1703 /*
1704 * we expect i_size = strlen(symname). Copy symname into the file
1705 * data, including the null terminator.
1706 */
1707 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1708 handle_t *handle,
1709 struct inode *inode,
1710 const char *symname)
1711 {
1712 struct buffer_head **bhs = NULL;
1713 const char *c;
1714 struct super_block *sb = osb->sb;
1715 u64 p_blkno, p_blocks;
1716 int virtual, blocks, status, i, bytes_left;
1717
1718 bytes_left = i_size_read(inode) + 1;
1719 /* we can't trust i_blocks because we're actually going to
1720 * write i_size + 1 bytes. */
1721 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1722
1723 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1724 i_size_read(inode), blocks);
1725
1726 /* Sanity check -- make sure we're going to fit. */
1727 if (bytes_left >
1728 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1729 status = -EIO;
1730 mlog_errno(status);
1731 goto bail;
1732 }
1733
1734 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1735 if (!bhs) {
1736 status = -ENOMEM;
1737 mlog_errno(status);
1738 goto bail;
1739 }
1740
1741 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1742 NULL);
1743 if (status < 0) {
1744 mlog_errno(status);
1745 goto bail;
1746 }
1747
1748 /* links can never be larger than one cluster so we know this
1749 * is all going to be contiguous, but do a sanity check
1750 * anyway. */
1751 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1752 status = -EIO;
1753 mlog_errno(status);
1754 goto bail;
1755 }
1756
1757 virtual = 0;
1758 while(bytes_left > 0) {
1759 c = &symname[virtual * sb->s_blocksize];
1760
1761 bhs[virtual] = sb_getblk(sb, p_blkno);
1762 if (!bhs[virtual]) {
1763 status = -ENOMEM;
1764 mlog_errno(status);
1765 goto bail;
1766 }
1767 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1768 bhs[virtual]);
1769
1770 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1771 bhs[virtual],
1772 OCFS2_JOURNAL_ACCESS_CREATE);
1773 if (status < 0) {
1774 mlog_errno(status);
1775 goto bail;
1776 }
1777
1778 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1779
1780 memcpy(bhs[virtual]->b_data, c,
1781 (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1782 bytes_left);
1783
1784 ocfs2_journal_dirty(handle, bhs[virtual]);
1785
1786 virtual++;
1787 p_blkno++;
1788 bytes_left -= sb->s_blocksize;
1789 }
1790
1791 status = 0;
1792 bail:
1793
1794 if (bhs) {
1795 for(i = 0; i < blocks; i++)
1796 brelse(bhs[i]);
1797 kfree(bhs);
1798 }
1799
1800 if (status)
1801 mlog_errno(status);
1802 return status;
1803 }
1804
1805 static int ocfs2_symlink(struct mnt_idmap *idmap,
1806 struct inode *dir,
1807 struct dentry *dentry,
1808 const char *symname)
1809 {
1810 int status, l, credits;
1811 u64 newsize;
1812 struct ocfs2_super *osb = NULL;
1813 struct inode *inode = NULL;
1814 struct super_block *sb;
1815 struct buffer_head *new_fe_bh = NULL;
1816 struct buffer_head *parent_fe_bh = NULL;
1817 struct ocfs2_dinode *fe = NULL;
1818 struct ocfs2_dinode *dirfe;
1819 handle_t *handle = NULL;
1820 struct ocfs2_alloc_context *inode_ac = NULL;
1821 struct ocfs2_alloc_context *data_ac = NULL;
1822 struct ocfs2_alloc_context *xattr_ac = NULL;
1823 int want_clusters = 0;
1824 int xattr_credits = 0;
1825 struct ocfs2_security_xattr_info si = {
1826 .name = NULL,
1827 .enable = 1,
1828 };
1829 int did_quota = 0, did_quota_inode = 0;
1830 struct ocfs2_dir_lookup_result lookup = { NULL, };
1831 sigset_t oldset;
1832 int did_block_signals = 0;
1833 struct ocfs2_dentry_lock *dl = NULL;
1834
1835 trace_ocfs2_symlink_begin(dir, dentry, symname,
1836 dentry->d_name.len, dentry->d_name.name);
1837
1838 status = dquot_initialize(dir);
1839 if (status) {
1840 mlog_errno(status);
1841 goto bail;
1842 }
1843
1844 sb = dir->i_sb;
1845 osb = OCFS2_SB(sb);
1846
1847 l = strlen(symname) + 1;
1848
1849 credits = ocfs2_calc_symlink_credits(sb);
1850
1851 /* lock the parent directory */
1852 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1853 if (status < 0) {
1854 if (status != -ENOENT)
1855 mlog_errno(status);
1856 return status;
1857 }
1858
1859 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1860 if (!ocfs2_read_links_count(dirfe)) {
1861 /* can't make a file in a deleted directory. */
1862 status = -ENOENT;
1863 goto bail;
1864 }
1865
1866 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1867 dentry->d_name.len);
1868 if (status)
1869 goto bail;
1870
1871 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1872 dentry->d_name.name,
1873 dentry->d_name.len, &lookup);
1874 if (status < 0) {
1875 mlog_errno(status);
1876 goto bail;
1877 }
1878
1879 status = ocfs2_reserve_new_inode(osb, &inode_ac);
1880 if (status < 0) {
1881 if (status != -ENOSPC)
1882 mlog_errno(status);
1883 goto bail;
1884 }
1885
1886 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1887 if (IS_ERR(inode)) {
1888 status = PTR_ERR(inode);
1889 inode = NULL;
1890 mlog_errno(status);
1891 goto bail;
1892 }
1893
1894 /* get security xattr */
1895 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1896 if (status) {
1897 if (status == -EOPNOTSUPP)
1898 si.enable = 0;
1899 else {
1900 mlog_errno(status);
1901 goto bail;
1902 }
1903 }
1904
1905 /* calculate meta data/clusters for setting security xattr */
1906 if (si.enable) {
1907 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1908 &xattr_credits, &xattr_ac);
1909 if (status < 0) {
1910 mlog_errno(status);
1911 goto bail;
1912 }
1913 }
1914
1915 /* don't reserve bitmap space for fast symlinks. */
1916 if (l > ocfs2_fast_symlink_chars(sb))
1917 want_clusters += 1;
1918
1919 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1920 if (status < 0) {
1921 if (status != -ENOSPC)
1922 mlog_errno(status);
1923 goto bail;
1924 }
1925
1926 handle = ocfs2_start_trans(osb, credits + xattr_credits);
1927 if (IS_ERR(handle)) {
1928 status = PTR_ERR(handle);
1929 handle = NULL;
1930 mlog_errno(status);
1931 goto bail;
1932 }
1933
1934 /* Starting to change things, restart is no longer possible. */
1935 ocfs2_block_signals(&oldset);
1936 did_block_signals = 1;
1937
1938 status = dquot_alloc_inode(inode);
1939 if (status)
1940 goto bail;
1941 did_quota_inode = 1;
1942
1943 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1944 dentry->d_name.name,
1945 (unsigned long long)OCFS2_I(dir)->ip_blkno,
1946 inode->i_mode);
1947
1948 status = ocfs2_mknod_locked(osb, dir, inode,
1949 0, &new_fe_bh, parent_fe_bh, handle,
1950 inode_ac);
1951 if (status < 0) {
1952 mlog_errno(status);
1953 goto bail;
1954 }
1955
1956 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1957 inode->i_rdev = 0;
1958 newsize = l - 1;
1959 inode->i_op = &ocfs2_symlink_inode_operations;
1960 inode_nohighmem(inode);
1961 if (l > ocfs2_fast_symlink_chars(sb)) {
1962 u32 offset = 0;
1963
1964 status = dquot_alloc_space_nodirty(inode,
1965 ocfs2_clusters_to_bytes(osb->sb, 1));
1966 if (status)
1967 goto bail;
1968 did_quota = 1;
1969 inode->i_mapping->a_ops = &ocfs2_aops;
1970 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1971 new_fe_bh,
1972 handle, data_ac, NULL,
1973 NULL);
1974 if (status < 0) {
1975 if (status != -ENOSPC && status != -EINTR) {
1976 mlog(ML_ERROR,
1977 "Failed to extend file to %llu\n",
1978 (unsigned long long)newsize);
1979 mlog_errno(status);
1980 status = -ENOSPC;
1981 }
1982 goto bail;
1983 }
1984 i_size_write(inode, newsize);
1985 inode->i_blocks = ocfs2_inode_sector_count(inode);
1986 } else {
1987 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1988 memcpy((char *) fe->id2.i_symlink, symname, l);
1989 i_size_write(inode, newsize);
1990 inode->i_blocks = 0;
1991 }
1992
1993 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1994 if (status < 0) {
1995 mlog_errno(status);
1996 goto bail;
1997 }
1998
1999 if (!ocfs2_inode_is_fast_symlink(inode)) {
2000 status = ocfs2_create_symlink_data(osb, handle, inode,
2001 symname);
2002 if (status < 0) {
2003 mlog_errno(status);
2004 goto bail;
2005 }
2006 }
2007
2008 if (si.enable) {
2009 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
2010 xattr_ac, data_ac);
2011 if (status < 0) {
2012 mlog_errno(status);
2013 goto bail;
2014 }
2015 }
2016
2017 /*
2018 * Do this before adding the entry to the directory. We add
2019 * also set d_op after success so that ->d_iput() will cleanup
2020 * the dentry lock even if ocfs2_add_entry() fails below.
2021 */
2022 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
2023 if (status) {
2024 mlog_errno(status);
2025 goto bail;
2026 }
2027
2028 dl = dentry->d_fsdata;
2029
2030 status = ocfs2_add_entry(handle, dentry, inode,
2031 le64_to_cpu(fe->i_blkno), parent_fe_bh,
2032 &lookup);
2033 if (status < 0) {
2034 mlog_errno(status);
2035 goto bail;
2036 }
2037
2038 insert_inode_hash(inode);
2039 d_instantiate(dentry, inode);
2040 bail:
2041 if (status < 0 && did_quota)
2042 dquot_free_space_nodirty(inode,
2043 ocfs2_clusters_to_bytes(osb->sb, 1));
2044 if (status < 0 && did_quota_inode)
2045 dquot_free_inode(inode);
2046 if (handle) {
2047 if (status < 0 && fe)
2048 ocfs2_set_links_count(fe, 0);
2049 ocfs2_commit_trans(osb, handle);
2050 }
2051
2052 ocfs2_inode_unlock(dir, 1);
2053 if (did_block_signals)
2054 ocfs2_unblock_signals(&oldset);
2055
2056 brelse(new_fe_bh);
2057 brelse(parent_fe_bh);
2058 kfree(si.value);
2059 ocfs2_free_dir_lookup_result(&lookup);
2060 if (inode_ac)
2061 ocfs2_free_alloc_context(inode_ac);
2062 if (data_ac)
2063 ocfs2_free_alloc_context(data_ac);
2064 if (xattr_ac)
2065 ocfs2_free_alloc_context(xattr_ac);
2066 if ((status < 0) && inode) {
2067 if (dl)
2068 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2069
2070 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
2071 clear_nlink(inode);
2072 iput(inode);
2073 }
2074
2075 if (status)
2076 mlog_errno(status);
2077
2078 return status;
2079 }
2080
2081 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2082 {
2083 int status, namelen;
2084
2085 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2086 (long long)blkno);
2087 if (namelen <= 0) {
2088 if (namelen)
2089 status = namelen;
2090 else
2091 status = -EINVAL;
2092 mlog_errno(status);
2093 goto bail;
2094 }
2095 if (namelen != OCFS2_ORPHAN_NAMELEN) {
2096 status = -EINVAL;
2097 mlog_errno(status);
2098 goto bail;
2099 }
2100
2101 trace_ocfs2_blkno_stringify(blkno, name, namelen);
2102
2103 status = 0;
2104 bail:
2105 if (status < 0)
2106 mlog_errno(status);
2107 return status;
2108 }
2109
2110 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2111 struct inode **ret_orphan_dir,
2112 struct buffer_head **ret_orphan_dir_bh)
2113 {
2114 struct inode *orphan_dir_inode;
2115 struct buffer_head *orphan_dir_bh = NULL;
2116 int ret = 0;
2117
2118 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2119 ORPHAN_DIR_SYSTEM_INODE,
2120 osb->slot_num);
2121 if (!orphan_dir_inode) {
2122 ret = -ENOENT;
2123 mlog_errno(ret);
2124 return ret;
2125 }
2126
2127 inode_lock(orphan_dir_inode);
2128
2129 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2130 if (ret < 0) {
2131 inode_unlock(orphan_dir_inode);
2132 iput(orphan_dir_inode);
2133
2134 mlog_errno(ret);
2135 return ret;
2136 }
2137
2138 *ret_orphan_dir = orphan_dir_inode;
2139 *ret_orphan_dir_bh = orphan_dir_bh;
2140
2141 return 0;
2142 }
2143
2144 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2145 struct buffer_head *orphan_dir_bh,
2146 u64 blkno,
2147 char *name,
2148 struct ocfs2_dir_lookup_result *lookup,
2149 bool dio)
2150 {
2151 int ret;
2152 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2153 int namelen = dio ?
2154 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2155 OCFS2_ORPHAN_NAMELEN;
2156
2157 if (dio) {
2158 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2159 OCFS2_DIO_ORPHAN_PREFIX);
2160 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2161 ret = -EINVAL;
2162 mlog_errno(ret);
2163 return ret;
2164 }
2165
2166 ret = ocfs2_blkno_stringify(blkno,
2167 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2168 } else
2169 ret = ocfs2_blkno_stringify(blkno, name);
2170 if (ret < 0) {
2171 mlog_errno(ret);
2172 return ret;
2173 }
2174
2175 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2176 orphan_dir_bh, name,
2177 namelen, lookup);
2178 if (ret < 0) {
2179 mlog_errno(ret);
2180 return ret;
2181 }
2182
2183 return 0;
2184 }
2185
2186 /**
2187 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2188 * insertion of an orphan.
2189 * @osb: ocfs2 file system
2190 * @ret_orphan_dir: Orphan dir inode - returned locked!
2191 * @blkno: Actual block number of the inode to be inserted into orphan dir.
2192 * @name: Buffer to store the name of the orphan.
2193 * @lookup: dir lookup result, to be passed back into functions like
2194 * ocfs2_orphan_add
2195 * @dio: Flag indicating if direct IO is being used or not.
2196 *
2197 * Returns zero on success and the ret_orphan_dir, name and lookup
2198 * fields will be populated.
2199 *
2200 * Returns non-zero on failure.
2201 */
2202 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2203 struct inode **ret_orphan_dir,
2204 u64 blkno,
2205 char *name,
2206 struct ocfs2_dir_lookup_result *lookup,
2207 bool dio)
2208 {
2209 struct inode *orphan_dir_inode = NULL;
2210 struct buffer_head *orphan_dir_bh = NULL;
2211 int ret = 0;
2212
2213 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2214 &orphan_dir_bh);
2215 if (ret < 0) {
2216 mlog_errno(ret);
2217 return ret;
2218 }
2219
2220 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2221 blkno, name, lookup, dio);
2222 if (ret < 0) {
2223 mlog_errno(ret);
2224 goto out;
2225 }
2226
2227 *ret_orphan_dir = orphan_dir_inode;
2228
2229 out:
2230 brelse(orphan_dir_bh);
2231
2232 if (ret) {
2233 ocfs2_inode_unlock(orphan_dir_inode, 1);
2234 inode_unlock(orphan_dir_inode);
2235 iput(orphan_dir_inode);
2236 }
2237
2238 if (ret)
2239 mlog_errno(ret);
2240 return ret;
2241 }
2242
2243 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2244 handle_t *handle,
2245 struct inode *inode,
2246 struct buffer_head *fe_bh,
2247 char *name,
2248 struct ocfs2_dir_lookup_result *lookup,
2249 struct inode *orphan_dir_inode,
2250 bool dio)
2251 {
2252 struct buffer_head *orphan_dir_bh = NULL;
2253 int status = 0;
2254 struct ocfs2_dinode *orphan_fe;
2255 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2256 int namelen = dio ?
2257 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2258 OCFS2_ORPHAN_NAMELEN;
2259
2260 trace_ocfs2_orphan_add_begin(
2261 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2262
2263 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2264 if (status < 0) {
2265 mlog_errno(status);
2266 goto leave;
2267 }
2268
2269 status = ocfs2_journal_access_di(handle,
2270 INODE_CACHE(orphan_dir_inode),
2271 orphan_dir_bh,
2272 OCFS2_JOURNAL_ACCESS_WRITE);
2273 if (status < 0) {
2274 mlog_errno(status);
2275 goto leave;
2276 }
2277
2278 /*
2279 * We're going to journal the change of i_flags and i_orphaned_slot.
2280 * It's safe anyway, though some callers may duplicate the journaling.
2281 * Journaling within the func just make the logic look more
2282 * straightforward.
2283 */
2284 status = ocfs2_journal_access_di(handle,
2285 INODE_CACHE(inode),
2286 fe_bh,
2287 OCFS2_JOURNAL_ACCESS_WRITE);
2288 if (status < 0) {
2289 mlog_errno(status);
2290 goto leave;
2291 }
2292
2293 /* we're a cluster, and nlink can change on disk from
2294 * underneath us... */
2295 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2296 if (S_ISDIR(inode->i_mode))
2297 ocfs2_add_links_count(orphan_fe, 1);
2298 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2299 ocfs2_journal_dirty(handle, orphan_dir_bh);
2300
2301 status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2302 namelen, inode,
2303 OCFS2_I(inode)->ip_blkno,
2304 orphan_dir_bh, lookup);
2305 if (status < 0) {
2306 mlog_errno(status);
2307 goto rollback;
2308 }
2309
2310 if (dio) {
2311 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan
2312 * slot.
2313 */
2314 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2315 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num);
2316 } else {
2317 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2318 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2319
2320 /* Record which orphan dir our inode now resides
2321 * in. delete_inode will use this to determine which orphan
2322 * dir to lock. */
2323 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2324 }
2325
2326 ocfs2_journal_dirty(handle, fe_bh);
2327
2328 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2329 osb->slot_num);
2330
2331 rollback:
2332 if (status < 0) {
2333 if (S_ISDIR(inode->i_mode))
2334 ocfs2_add_links_count(orphan_fe, -1);
2335 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2336 }
2337
2338 leave:
2339 brelse(orphan_dir_bh);
2340
2341 return status;
2342 }
2343
2344 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2345 int ocfs2_orphan_del(struct ocfs2_super *osb,
2346 handle_t *handle,
2347 struct inode *orphan_dir_inode,
2348 struct inode *inode,
2349 struct buffer_head *orphan_dir_bh,
2350 bool dio)
2351 {
2352 char name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2353 struct ocfs2_dinode *orphan_fe;
2354 int status = 0;
2355 struct ocfs2_dir_lookup_result lookup = { NULL, };
2356
2357 if (dio) {
2358 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2359 OCFS2_DIO_ORPHAN_PREFIX);
2360 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2361 status = -EINVAL;
2362 mlog_errno(status);
2363 return status;
2364 }
2365
2366 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno,
2367 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2368 } else
2369 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2370 if (status < 0) {
2371 mlog_errno(status);
2372 goto leave;
2373 }
2374
2375 trace_ocfs2_orphan_del(
2376 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2377 name, strlen(name));
2378
2379 status = ocfs2_journal_access_di(handle,
2380 INODE_CACHE(orphan_dir_inode),
2381 orphan_dir_bh,
2382 OCFS2_JOURNAL_ACCESS_WRITE);
2383 if (status < 0) {
2384 mlog_errno(status);
2385 goto leave;
2386 }
2387
2388 /* find it's spot in the orphan directory */
2389 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode,
2390 &lookup);
2391 if (status) {
2392 mlog_errno(status);
2393 goto leave;
2394 }
2395
2396 /* remove it from the orphan directory */
2397 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2398 if (status < 0) {
2399 mlog_errno(status);
2400 goto leave;
2401 }
2402
2403 /* do the i_nlink dance! :) */
2404 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2405 if (S_ISDIR(inode->i_mode))
2406 ocfs2_add_links_count(orphan_fe, -1);
2407 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2408 ocfs2_journal_dirty(handle, orphan_dir_bh);
2409
2410 leave:
2411 ocfs2_free_dir_lookup_result(&lookup);
2412
2413 if (status)
2414 mlog_errno(status);
2415 return status;
2416 }
2417
2418 /**
2419 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2420 * allocated file. This is different from the typical 'add to orphan dir'
2421 * operation in that the inode does not yet exist. This is a problem because
2422 * the orphan dir stringifies the inode block number to come up with it's
2423 * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2424 * problem. This function works around it by calling deeper into the orphan
2425 * and suballoc code than other callers. Use this only by necessity.
2426 * @dir: The directory which this inode will ultimately wind up under - not the
2427 * orphan dir!
2428 * @dir_bh: buffer_head the @dir inode block
2429 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2430 * with the string to be used for orphan dirent. Pass back to the orphan dir
2431 * code.
2432 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2433 * dir code.
2434 * @ret_di_blkno: block number where the new inode will be allocated.
2435 * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2436 * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2437 *
2438 * Returns zero on success and the ret_orphan_dir, name and lookup
2439 * fields will be populated.
2440 *
2441 * Returns non-zero on failure.
2442 */
2443 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2444 struct buffer_head *dir_bh,
2445 char *orphan_name,
2446 struct inode **ret_orphan_dir,
2447 u64 *ret_di_blkno,
2448 struct ocfs2_dir_lookup_result *orphan_insert,
2449 struct ocfs2_alloc_context **ret_inode_ac)
2450 {
2451 int ret;
2452 u64 di_blkno;
2453 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2454 struct inode *orphan_dir = NULL;
2455 struct buffer_head *orphan_dir_bh = NULL;
2456 struct ocfs2_alloc_context *inode_ac = NULL;
2457
2458 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2459 if (ret < 0) {
2460 mlog_errno(ret);
2461 return ret;
2462 }
2463
2464 /* reserve an inode spot */
2465 ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2466 if (ret < 0) {
2467 if (ret != -ENOSPC)
2468 mlog_errno(ret);
2469 goto out;
2470 }
2471
2472 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2473 &di_blkno);
2474 if (ret) {
2475 mlog_errno(ret);
2476 goto out;
2477 }
2478
2479 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2480 di_blkno, orphan_name, orphan_insert,
2481 false);
2482 if (ret < 0) {
2483 mlog_errno(ret);
2484 goto out;
2485 }
2486
2487 out:
2488 if (ret == 0) {
2489 *ret_orphan_dir = orphan_dir;
2490 *ret_di_blkno = di_blkno;
2491 *ret_inode_ac = inode_ac;
2492 /*
2493 * orphan_name and orphan_insert are already up to
2494 * date via prepare_orphan_dir
2495 */
2496 } else {
2497 /* Unroll reserve_new_inode* */
2498 if (inode_ac)
2499 ocfs2_free_alloc_context(inode_ac);
2500
2501 /* Unroll orphan dir locking */
2502 inode_unlock(orphan_dir);
2503 ocfs2_inode_unlock(orphan_dir, 1);
2504 iput(orphan_dir);
2505 }
2506
2507 brelse(orphan_dir_bh);
2508
2509 return ret;
2510 }
2511
2512 int ocfs2_create_inode_in_orphan(struct inode *dir,
2513 int mode,
2514 struct inode **new_inode)
2515 {
2516 int status, did_quota_inode = 0;
2517 struct inode *inode = NULL;
2518 struct inode *orphan_dir = NULL;
2519 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2520 handle_t *handle = NULL;
2521 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2522 struct buffer_head *parent_di_bh = NULL;
2523 struct buffer_head *new_di_bh = NULL;
2524 struct ocfs2_alloc_context *inode_ac = NULL;
2525 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2526 u64 di_blkno, suballoc_loc;
2527 u16 suballoc_bit;
2528
2529 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2530 if (status < 0) {
2531 if (status != -ENOENT)
2532 mlog_errno(status);
2533 return status;
2534 }
2535
2536 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2537 orphan_name, &orphan_dir,
2538 &di_blkno, &orphan_insert, &inode_ac);
2539 if (status < 0) {
2540 if (status != -ENOSPC)
2541 mlog_errno(status);
2542 goto leave;
2543 }
2544
2545 inode = ocfs2_get_init_inode(dir, mode);
2546 if (IS_ERR(inode)) {
2547 status = PTR_ERR(inode);
2548 inode = NULL;
2549 mlog_errno(status);
2550 goto leave;
2551 }
2552
2553 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2554 if (IS_ERR(handle)) {
2555 status = PTR_ERR(handle);
2556 handle = NULL;
2557 mlog_errno(status);
2558 goto leave;
2559 }
2560
2561 status = dquot_alloc_inode(inode);
2562 if (status)
2563 goto leave;
2564 did_quota_inode = 1;
2565
2566 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2567 &suballoc_loc,
2568 &suballoc_bit, di_blkno);
2569 if (status < 0) {
2570 mlog_errno(status);
2571 goto leave;
2572 }
2573
2574 clear_nlink(inode);
2575 /* do the real work now. */
2576 status = __ocfs2_mknod_locked(dir, inode,
2577 0, &new_di_bh, parent_di_bh, handle,
2578 inode_ac, di_blkno, suballoc_loc,
2579 suballoc_bit);
2580 if (status < 0) {
2581 mlog_errno(status);
2582 goto leave;
2583 }
2584
2585 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2586 &orphan_insert, orphan_dir, false);
2587 if (status < 0) {
2588 mlog_errno(status);
2589 goto leave;
2590 }
2591
2592 /* get open lock so that only nodes can't remove it from orphan dir. */
2593 status = ocfs2_open_lock(inode);
2594 if (status < 0)
2595 mlog_errno(status);
2596
2597 insert_inode_hash(inode);
2598 leave:
2599 if (status < 0 && did_quota_inode)
2600 dquot_free_inode(inode);
2601 if (handle)
2602 ocfs2_commit_trans(osb, handle);
2603
2604 if (orphan_dir) {
2605 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2606 ocfs2_inode_unlock(orphan_dir, 1);
2607 inode_unlock(orphan_dir);
2608 iput(orphan_dir);
2609 }
2610
2611 if ((status < 0) && inode) {
2612 clear_nlink(inode);
2613 iput(inode);
2614 }
2615
2616 if (inode_ac)
2617 ocfs2_free_alloc_context(inode_ac);
2618
2619 brelse(new_di_bh);
2620
2621 if (!status)
2622 *new_inode = inode;
2623
2624 ocfs2_free_dir_lookup_result(&orphan_insert);
2625
2626 ocfs2_inode_unlock(dir, 1);
2627 brelse(parent_di_bh);
2628 return status;
2629 }
2630
2631 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
2632 struct inode *inode)
2633 {
2634 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2635 struct inode *orphan_dir_inode = NULL;
2636 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2637 struct buffer_head *di_bh = NULL;
2638 int status = 0;
2639 handle_t *handle = NULL;
2640 struct ocfs2_dinode *di = NULL;
2641
2642 status = ocfs2_inode_lock(inode, &di_bh, 1);
2643 if (status < 0) {
2644 mlog_errno(status);
2645 goto bail;
2646 }
2647
2648 di = (struct ocfs2_dinode *) di_bh->b_data;
2649 /*
2650 * Another append dio crashed?
2651 * If so, manually recover it first.
2652 */
2653 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
2654 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode));
2655 if (status < 0) {
2656 if (status != -ENOSPC)
2657 mlog_errno(status);
2658 goto bail_unlock_inode;
2659 }
2660
2661 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0);
2662 if (status < 0) {
2663 mlog_errno(status);
2664 goto bail_unlock_inode;
2665 }
2666 }
2667
2668 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
2669 OCFS2_I(inode)->ip_blkno,
2670 orphan_name,
2671 &orphan_insert,
2672 true);
2673 if (status < 0) {
2674 mlog_errno(status);
2675 goto bail_unlock_inode;
2676 }
2677
2678 handle = ocfs2_start_trans(osb,
2679 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS);
2680 if (IS_ERR(handle)) {
2681 status = PTR_ERR(handle);
2682 goto bail_unlock_orphan;
2683 }
2684
2685 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
2686 &orphan_insert, orphan_dir_inode, true);
2687 if (status)
2688 mlog_errno(status);
2689
2690 ocfs2_commit_trans(osb, handle);
2691
2692 bail_unlock_orphan:
2693 ocfs2_inode_unlock(orphan_dir_inode, 1);
2694 inode_unlock(orphan_dir_inode);
2695 iput(orphan_dir_inode);
2696
2697 ocfs2_free_dir_lookup_result(&orphan_insert);
2698
2699 bail_unlock_inode:
2700 ocfs2_inode_unlock(inode, 1);
2701 brelse(di_bh);
2702
2703 bail:
2704 return status;
2705 }
2706
2707 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
2708 struct inode *inode, struct buffer_head *di_bh,
2709 int update_isize, loff_t end)
2710 {
2711 struct inode *orphan_dir_inode = NULL;
2712 struct buffer_head *orphan_dir_bh = NULL;
2713 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2714 handle_t *handle = NULL;
2715 int status = 0;
2716
2717 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2718 ORPHAN_DIR_SYSTEM_INODE,
2719 le16_to_cpu(di->i_dio_orphaned_slot));
2720 if (!orphan_dir_inode) {
2721 status = -ENOENT;
2722 mlog_errno(status);
2723 goto bail;
2724 }
2725
2726 inode_lock(orphan_dir_inode);
2727 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2728 if (status < 0) {
2729 inode_unlock(orphan_dir_inode);
2730 iput(orphan_dir_inode);
2731 mlog_errno(status);
2732 goto bail;
2733 }
2734
2735 handle = ocfs2_start_trans(osb,
2736 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS);
2737 if (IS_ERR(handle)) {
2738 status = PTR_ERR(handle);
2739 goto bail_unlock_orphan;
2740 }
2741
2742 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)));
2743
2744 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
2745 inode, orphan_dir_bh, true);
2746 if (status < 0) {
2747 mlog_errno(status);
2748 goto bail_commit;
2749 }
2750
2751 status = ocfs2_journal_access_di(handle,
2752 INODE_CACHE(inode),
2753 di_bh,
2754 OCFS2_JOURNAL_ACCESS_WRITE);
2755 if (status < 0) {
2756 mlog_errno(status);
2757 goto bail_commit;
2758 }
2759
2760 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2761 di->i_dio_orphaned_slot = 0;
2762
2763 if (update_isize) {
2764 status = ocfs2_set_inode_size(handle, inode, di_bh, end);
2765 if (status)
2766 mlog_errno(status);
2767 } else
2768 ocfs2_journal_dirty(handle, di_bh);
2769
2770 bail_commit:
2771 ocfs2_commit_trans(osb, handle);
2772
2773 bail_unlock_orphan:
2774 ocfs2_inode_unlock(orphan_dir_inode, 1);
2775 inode_unlock(orphan_dir_inode);
2776 brelse(orphan_dir_bh);
2777 iput(orphan_dir_inode);
2778
2779 bail:
2780 return status;
2781 }
2782
2783 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2784 struct inode *inode,
2785 struct dentry *dentry)
2786 {
2787 int status = 0;
2788 struct buffer_head *parent_di_bh = NULL;
2789 handle_t *handle = NULL;
2790 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2791 struct ocfs2_dinode *dir_di, *di;
2792 struct inode *orphan_dir_inode = NULL;
2793 struct buffer_head *orphan_dir_bh = NULL;
2794 struct buffer_head *di_bh = NULL;
2795 struct ocfs2_dir_lookup_result lookup = { NULL, };
2796
2797 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2798 dentry->d_name.len, dentry->d_name.name,
2799 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2800 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2801
2802 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2803 if (status < 0) {
2804 if (status != -ENOENT)
2805 mlog_errno(status);
2806 return status;
2807 }
2808
2809 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2810 if (!dir_di->i_links_count) {
2811 /* can't make a file in a deleted directory. */
2812 status = -ENOENT;
2813 goto leave;
2814 }
2815
2816 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2817 dentry->d_name.len);
2818 if (status)
2819 goto leave;
2820
2821 /* get a spot inside the dir. */
2822 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2823 dentry->d_name.name,
2824 dentry->d_name.len, &lookup);
2825 if (status < 0) {
2826 mlog_errno(status);
2827 goto leave;
2828 }
2829
2830 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2831 ORPHAN_DIR_SYSTEM_INODE,
2832 osb->slot_num);
2833 if (!orphan_dir_inode) {
2834 status = -ENOENT;
2835 mlog_errno(status);
2836 goto leave;
2837 }
2838
2839 inode_lock(orphan_dir_inode);
2840
2841 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2842 if (status < 0) {
2843 mlog_errno(status);
2844 inode_unlock(orphan_dir_inode);
2845 iput(orphan_dir_inode);
2846 goto leave;
2847 }
2848
2849 status = ocfs2_read_inode_block(inode, &di_bh);
2850 if (status < 0) {
2851 mlog_errno(status);
2852 goto orphan_unlock;
2853 }
2854
2855 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2856 if (IS_ERR(handle)) {
2857 status = PTR_ERR(handle);
2858 handle = NULL;
2859 mlog_errno(status);
2860 goto orphan_unlock;
2861 }
2862
2863 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2864 di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2865 if (status < 0) {
2866 mlog_errno(status);
2867 goto out_commit;
2868 }
2869
2870 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2871 orphan_dir_bh, false);
2872 if (status < 0) {
2873 mlog_errno(status);
2874 goto out_commit;
2875 }
2876
2877 di = (struct ocfs2_dinode *)di_bh->b_data;
2878 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2879 di->i_orphaned_slot = 0;
2880 set_nlink(inode, 1);
2881 ocfs2_set_links_count(di, inode->i_nlink);
2882 ocfs2_update_inode_fsync_trans(handle, inode, 1);
2883 ocfs2_journal_dirty(handle, di_bh);
2884
2885 status = ocfs2_add_entry(handle, dentry, inode,
2886 OCFS2_I(inode)->ip_blkno, parent_di_bh,
2887 &lookup);
2888 if (status < 0) {
2889 mlog_errno(status);
2890 goto out_commit;
2891 }
2892
2893 status = ocfs2_dentry_attach_lock(dentry, inode,
2894 OCFS2_I(dir)->ip_blkno);
2895 if (status) {
2896 mlog_errno(status);
2897 goto out_commit;
2898 }
2899
2900 d_instantiate(dentry, inode);
2901 status = 0;
2902 out_commit:
2903 ocfs2_commit_trans(osb, handle);
2904 orphan_unlock:
2905 ocfs2_inode_unlock(orphan_dir_inode, 1);
2906 inode_unlock(orphan_dir_inode);
2907 iput(orphan_dir_inode);
2908 leave:
2909
2910 ocfs2_inode_unlock(dir, 1);
2911
2912 brelse(di_bh);
2913 brelse(parent_di_bh);
2914 brelse(orphan_dir_bh);
2915
2916 ocfs2_free_dir_lookup_result(&lookup);
2917
2918 if (status)
2919 mlog_errno(status);
2920
2921 return status;
2922 }
2923
2924 const struct inode_operations ocfs2_dir_iops = {
2925 .create = ocfs2_create,
2926 .lookup = ocfs2_lookup,
2927 .link = ocfs2_link,
2928 .unlink = ocfs2_unlink,
2929 .rmdir = ocfs2_unlink,
2930 .symlink = ocfs2_symlink,
2931 .mkdir = ocfs2_mkdir,
2932 .mknod = ocfs2_mknod,
2933 .rename = ocfs2_rename,
2934 .setattr = ocfs2_setattr,
2935 .getattr = ocfs2_getattr,
2936 .permission = ocfs2_permission,
2937 .listxattr = ocfs2_listxattr,
2938 .fiemap = ocfs2_fiemap,
2939 .get_inode_acl = ocfs2_iop_get_acl,
2940 .set_acl = ocfs2_iop_set_acl,
2941 .fileattr_get = ocfs2_fileattr_get,
2942 .fileattr_set = ocfs2_fileattr_set,
2943 };
2944
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