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drm/panfrost: Remove set but not used variable 'bo'
[linux/fpc-iii.git] / fs / ocfs2 / namei.c
blobda65251ef8159388229f4cbb4514e313fcb8801b
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(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 inode *dir,
225 struct dentry *dentry,
226 umode_t mode,
227 dev_t dev)
228 {
229 int status = 0;
230 struct buffer_head *parent_fe_bh = NULL;
231 handle_t *handle = NULL;
232 struct ocfs2_super *osb;
233 struct ocfs2_dinode *dirfe;
234 struct buffer_head *new_fe_bh = NULL;
235 struct inode *inode = NULL;
236 struct ocfs2_alloc_context *inode_ac = NULL;
237 struct ocfs2_alloc_context *data_ac = NULL;
238 struct ocfs2_alloc_context *meta_ac = NULL;
239 int want_clusters = 0;
240 int want_meta = 0;
241 int xattr_credits = 0;
242 struct ocfs2_security_xattr_info si = {
243 .enable = 1,
244 };
245 int did_quota_inode = 0;
246 struct ocfs2_dir_lookup_result lookup = { NULL, };
247 sigset_t oldset;
248 int did_block_signals = 0;
249 struct ocfs2_dentry_lock *dl = NULL;
250
251 trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
252 (unsigned long long)OCFS2_I(dir)->ip_blkno,
253 (unsigned long)dev, mode);
254
255 status = dquot_initialize(dir);
256 if (status) {
257 mlog_errno(status);
258 return status;
259 }
260
261 /* get our super block */
262 osb = OCFS2_SB(dir->i_sb);
263
264 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
265 if (status < 0) {
266 if (status != -ENOENT)
267 mlog_errno(status);
268 return status;
269 }
270
271 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
272 status = -EMLINK;
273 goto leave;
274 }
275
276 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
277 if (!ocfs2_read_links_count(dirfe)) {
278 /* can't make a file in a deleted directory. */
279 status = -ENOENT;
280 goto leave;
281 }
282
283 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
284 dentry->d_name.len);
285 if (status)
286 goto leave;
287
288 /* get a spot inside the dir. */
289 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
290 dentry->d_name.name,
291 dentry->d_name.len, &lookup);
292 if (status < 0) {
293 mlog_errno(status);
294 goto leave;
295 }
296
297 /* reserve an inode spot */
298 status = ocfs2_reserve_new_inode(osb, &inode_ac);
299 if (status < 0) {
300 if (status != -ENOSPC)
301 mlog_errno(status);
302 goto leave;
303 }
304
305 inode = ocfs2_get_init_inode(dir, mode);
306 if (IS_ERR(inode)) {
307 status = PTR_ERR(inode);
308 inode = NULL;
309 mlog_errno(status);
310 goto leave;
311 }
312
313 /* get security xattr */
314 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
315 if (status) {
316 if (status == -EOPNOTSUPP)
317 si.enable = 0;
318 else {
319 mlog_errno(status);
320 goto leave;
321 }
322 }
323
324 /* calculate meta data/clusters for setting security and acl xattr */
325 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
326 &si, &want_clusters,
327 &xattr_credits, &want_meta);
328 if (status < 0) {
329 mlog_errno(status);
330 goto leave;
331 }
332
333 /* Reserve a cluster if creating an extent based directory. */
334 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
335 want_clusters += 1;
336
337 /* Dir indexing requires extra space as well */
338 if (ocfs2_supports_indexed_dirs(osb))
339 want_meta++;
340 }
341
342 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
343 if (status < 0) {
344 if (status != -ENOSPC)
345 mlog_errno(status);
346 goto leave;
347 }
348
349 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
350 if (status < 0) {
351 if (status != -ENOSPC)
352 mlog_errno(status);
353 goto leave;
354 }
355
356 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
357 S_ISDIR(mode),
358 xattr_credits));
359 if (IS_ERR(handle)) {
360 status = PTR_ERR(handle);
361 handle = NULL;
362 mlog_errno(status);
363 goto leave;
364 }
365
366 /* Starting to change things, restart is no longer possible. */
367 ocfs2_block_signals(&oldset);
368 did_block_signals = 1;
369
370 status = dquot_alloc_inode(inode);
371 if (status)
372 goto leave;
373 did_quota_inode = 1;
374
375 /* do the real work now. */
376 status = ocfs2_mknod_locked(osb, dir, inode, dev,
377 &new_fe_bh, parent_fe_bh, handle,
378 inode_ac);
379 if (status < 0) {
380 mlog_errno(status);
381 goto leave;
382 }
383
384 if (S_ISDIR(mode)) {
385 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
386 new_fe_bh, data_ac, meta_ac);
387 if (status < 0) {
388 mlog_errno(status);
389 goto leave;
390 }
391
392 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
393 parent_fe_bh,
394 OCFS2_JOURNAL_ACCESS_WRITE);
395 if (status < 0) {
396 mlog_errno(status);
397 goto leave;
398 }
399 ocfs2_add_links_count(dirfe, 1);
400 ocfs2_journal_dirty(handle, parent_fe_bh);
401 inc_nlink(dir);
402 }
403
404 status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
405 meta_ac, data_ac);
406
407 if (status < 0) {
408 mlog_errno(status);
409 goto leave;
410 }
411
412 if (si.enable) {
413 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
414 meta_ac, data_ac);
415 if (status < 0) {
416 mlog_errno(status);
417 goto leave;
418 }
419 }
420
421 /*
422 * Do this before adding the entry to the directory. We add
423 * also set d_op after success so that ->d_iput() will cleanup
424 * the dentry lock even if ocfs2_add_entry() fails below.
425 */
426 status = ocfs2_dentry_attach_lock(dentry, inode,
427 OCFS2_I(dir)->ip_blkno);
428 if (status) {
429 mlog_errno(status);
430 goto leave;
431 }
432
433 dl = dentry->d_fsdata;
434
435 status = ocfs2_add_entry(handle, dentry, inode,
436 OCFS2_I(inode)->ip_blkno, parent_fe_bh,
437 &lookup);
438 if (status < 0) {
439 mlog_errno(status);
440 goto leave;
441 }
442
443 insert_inode_hash(inode);
444 d_instantiate(dentry, inode);
445 status = 0;
446 leave:
447 if (status < 0 && did_quota_inode)
448 dquot_free_inode(inode);
449 if (handle)
450 ocfs2_commit_trans(osb, handle);
451
452 ocfs2_inode_unlock(dir, 1);
453 if (did_block_signals)
454 ocfs2_unblock_signals(&oldset);
455
456 brelse(new_fe_bh);
457 brelse(parent_fe_bh);
458 kfree(si.value);
459
460 ocfs2_free_dir_lookup_result(&lookup);
461
462 if (inode_ac)
463 ocfs2_free_alloc_context(inode_ac);
464
465 if (data_ac)
466 ocfs2_free_alloc_context(data_ac);
467
468 if (meta_ac)
469 ocfs2_free_alloc_context(meta_ac);
470
471 /*
472 * We should call iput after the i_mutex of the bitmap been
473 * unlocked in ocfs2_free_alloc_context, or the
474 * ocfs2_delete_inode will mutex_lock again.
475 */
476 if ((status < 0) && inode) {
477 if (dl)
478 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
479
480 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
481 clear_nlink(inode);
482 iput(inode);
483 }
484
485 if (status)
486 mlog_errno(status);
487
488 return status;
489 }
490
491 static int __ocfs2_mknod_locked(struct inode *dir,
492 struct inode *inode,
493 dev_t dev,
494 struct buffer_head **new_fe_bh,
495 struct buffer_head *parent_fe_bh,
496 handle_t *handle,
497 struct ocfs2_alloc_context *inode_ac,
498 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
499 {
500 int status = 0;
501 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
502 struct ocfs2_dinode *fe = NULL;
503 struct ocfs2_extent_list *fel;
504 u16 feat;
505 struct ocfs2_inode_info *oi = OCFS2_I(inode);
506 struct timespec64 ts;
507
508 *new_fe_bh = NULL;
509
510 /* populate as many fields early on as possible - many of
511 * these are used by the support functions here and in
512 * callers. */
513 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
514 oi->ip_blkno = fe_blkno;
515 spin_lock(&osb->osb_lock);
516 inode->i_generation = osb->s_next_generation++;
517 spin_unlock(&osb->osb_lock);
518
519 *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
520 if (!*new_fe_bh) {
521 status = -ENOMEM;
522 mlog_errno(status);
523 goto leave;
524 }
525 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
526
527 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
528 *new_fe_bh,
529 OCFS2_JOURNAL_ACCESS_CREATE);
530 if (status < 0) {
531 mlog_errno(status);
532 goto leave;
533 }
534
535 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
536 memset(fe, 0, osb->sb->s_blocksize);
537
538 fe->i_generation = cpu_to_le32(inode->i_generation);
539 fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
540 fe->i_blkno = cpu_to_le64(fe_blkno);
541 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
542 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
543 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
544 fe->i_uid = cpu_to_le32(i_uid_read(inode));
545 fe->i_gid = cpu_to_le32(i_gid_read(inode));
546 fe->i_mode = cpu_to_le16(inode->i_mode);
547 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
548 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
549
550 ocfs2_set_links_count(fe, inode->i_nlink);
551
552 fe->i_last_eb_blk = 0;
553 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
554 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
555 ktime_get_real_ts64(&ts);
556 fe->i_atime = fe->i_ctime = fe->i_mtime =
557 cpu_to_le64(ts.tv_sec);
558 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
559 cpu_to_le32(ts.tv_nsec);
560 fe->i_dtime = 0;
561
562 /*
563 * If supported, directories start with inline data. If inline
564 * isn't supported, but indexing is, we start them as indexed.
565 */
566 feat = le16_to_cpu(fe->i_dyn_features);
567 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
568 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
569
570 fe->id2.i_data.id_count = cpu_to_le16(
571 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
572 } else {
573 fel = &fe->id2.i_list;
574 fel->l_tree_depth = 0;
575 fel->l_next_free_rec = 0;
576 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
577 }
578
579 ocfs2_journal_dirty(handle, *new_fe_bh);
580
581 ocfs2_populate_inode(inode, fe, 1);
582 ocfs2_ci_set_new(osb, INODE_CACHE(inode));
583 if (!ocfs2_mount_local(osb)) {
584 status = ocfs2_create_new_inode_locks(inode);
585 if (status < 0)
586 mlog_errno(status);
587 }
588
589 ocfs2_update_inode_fsync_trans(handle, inode, 1);
590
591 leave:
592 if (status < 0) {
593 if (*new_fe_bh) {
594 brelse(*new_fe_bh);
595 *new_fe_bh = NULL;
596 }
597 }
598
599 if (status)
600 mlog_errno(status);
601 return status;
602 }
603
604 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
605 struct inode *dir,
606 struct inode *inode,
607 dev_t dev,
608 struct buffer_head **new_fe_bh,
609 struct buffer_head *parent_fe_bh,
610 handle_t *handle,
611 struct ocfs2_alloc_context *inode_ac)
612 {
613 int status = 0;
614 u64 suballoc_loc, fe_blkno = 0;
615 u16 suballoc_bit;
616
617 *new_fe_bh = NULL;
618
619 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
620 inode_ac, &suballoc_loc,
621 &suballoc_bit, &fe_blkno);
622 if (status < 0) {
623 mlog_errno(status);
624 return status;
625 }
626
627 status = __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
628 parent_fe_bh, handle, inode_ac,
629 fe_blkno, suballoc_loc, suballoc_bit);
630 if (status < 0) {
631 u64 bg_blkno = ocfs2_which_suballoc_group(fe_blkno, suballoc_bit);
632 int tmp = ocfs2_free_suballoc_bits(handle, inode_ac->ac_inode,
633 inode_ac->ac_bh, suballoc_bit, bg_blkno, 1);
634 if (tmp)
635 mlog_errno(tmp);
636 }
637
638 return status;
639 }
640
641 static int ocfs2_mkdir(struct inode *dir,
642 struct dentry *dentry,
643 umode_t mode)
644 {
645 int ret;
646
647 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
648 OCFS2_I(dir)->ip_blkno, mode);
649 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
650 if (ret)
651 mlog_errno(ret);
652
653 return ret;
654 }
655
656 static int ocfs2_create(struct inode *dir,
657 struct dentry *dentry,
658 umode_t mode,
659 bool excl)
660 {
661 int ret;
662
663 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
664 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
665 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
666 if (ret)
667 mlog_errno(ret);
668
669 return ret;
670 }
671
672 static int ocfs2_link(struct dentry *old_dentry,
673 struct inode *dir,
674 struct dentry *dentry)
675 {
676 handle_t *handle;
677 struct inode *inode = d_inode(old_dentry);
678 struct inode *old_dir = d_inode(old_dentry->d_parent);
679 int err;
680 struct buffer_head *fe_bh = NULL;
681 struct buffer_head *old_dir_bh = NULL;
682 struct buffer_head *parent_fe_bh = NULL;
683 struct ocfs2_dinode *fe = NULL;
684 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
685 struct ocfs2_dir_lookup_result lookup = { NULL, };
686 sigset_t oldset;
687 u64 old_de_ino;
688
689 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
690 old_dentry->d_name.len, old_dentry->d_name.name,
691 dentry->d_name.len, dentry->d_name.name);
692
693 if (S_ISDIR(inode->i_mode))
694 return -EPERM;
695
696 err = dquot_initialize(dir);
697 if (err) {
698 mlog_errno(err);
699 return err;
700 }
701
702 err = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
703 &parent_fe_bh, dir, 0);
704 if (err < 0) {
705 if (err != -ENOENT)
706 mlog_errno(err);
707 return err;
708 }
709
710 /* make sure both dirs have bhs
711 * get an extra ref on old_dir_bh if old==new */
712 if (!parent_fe_bh) {
713 if (old_dir_bh) {
714 parent_fe_bh = old_dir_bh;
715 get_bh(parent_fe_bh);
716 } else {
717 mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str);
718 err = -EIO;
719 goto out;
720 }
721 }
722
723 if (!dir->i_nlink) {
724 err = -ENOENT;
725 goto out;
726 }
727
728 err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
729 old_dentry->d_name.len, &old_de_ino);
730 if (err) {
731 err = -ENOENT;
732 goto out;
733 }
734
735 /*
736 * Check whether another node removed the source inode while we
737 * were in the vfs.
738 */
739 if (old_de_ino != OCFS2_I(inode)->ip_blkno) {
740 err = -ENOENT;
741 goto out;
742 }
743
744 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
745 dentry->d_name.len);
746 if (err)
747 goto out;
748
749 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
750 dentry->d_name.name,
751 dentry->d_name.len, &lookup);
752 if (err < 0) {
753 mlog_errno(err);
754 goto out;
755 }
756
757 err = ocfs2_inode_lock(inode, &fe_bh, 1);
758 if (err < 0) {
759 if (err != -ENOENT)
760 mlog_errno(err);
761 goto out;
762 }
763
764 fe = (struct ocfs2_dinode *) fe_bh->b_data;
765 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
766 err = -EMLINK;
767 goto out_unlock_inode;
768 }
769
770 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
771 if (IS_ERR(handle)) {
772 err = PTR_ERR(handle);
773 handle = NULL;
774 mlog_errno(err);
775 goto out_unlock_inode;
776 }
777
778 /* Starting to change things, restart is no longer possible. */
779 ocfs2_block_signals(&oldset);
780
781 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
782 OCFS2_JOURNAL_ACCESS_WRITE);
783 if (err < 0) {
784 mlog_errno(err);
785 goto out_commit;
786 }
787
788 inc_nlink(inode);
789 inode->i_ctime = current_time(inode);
790 ocfs2_set_links_count(fe, inode->i_nlink);
791 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
792 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
793 ocfs2_journal_dirty(handle, fe_bh);
794
795 err = ocfs2_add_entry(handle, dentry, inode,
796 OCFS2_I(inode)->ip_blkno,
797 parent_fe_bh, &lookup);
798 if (err) {
799 ocfs2_add_links_count(fe, -1);
800 drop_nlink(inode);
801 mlog_errno(err);
802 goto out_commit;
803 }
804
805 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
806 if (err) {
807 mlog_errno(err);
808 goto out_commit;
809 }
810
811 ihold(inode);
812 d_instantiate(dentry, inode);
813
814 out_commit:
815 ocfs2_commit_trans(osb, handle);
816 ocfs2_unblock_signals(&oldset);
817 out_unlock_inode:
818 ocfs2_inode_unlock(inode, 1);
819
820 out:
821 ocfs2_double_unlock(old_dir, dir);
822
823 brelse(fe_bh);
824 brelse(parent_fe_bh);
825 brelse(old_dir_bh);
826
827 ocfs2_free_dir_lookup_result(&lookup);
828
829 if (err)
830 mlog_errno(err);
831
832 return err;
833 }
834
835 /*
836 * Takes and drops an exclusive lock on the given dentry. This will
837 * force other nodes to drop it.
838 */
839 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
840 {
841 int ret;
842
843 ret = ocfs2_dentry_lock(dentry, 1);
844 if (ret)
845 mlog_errno(ret);
846 else
847 ocfs2_dentry_unlock(dentry, 1);
848
849 return ret;
850 }
851
852 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
853 {
854 if (S_ISDIR(inode->i_mode)) {
855 if (inode->i_nlink == 2)
856 return 1;
857 return 0;
858 }
859
860 if (inode->i_nlink == 1)
861 return 1;
862 return 0;
863 }
864
865 static int ocfs2_unlink(struct inode *dir,
866 struct dentry *dentry)
867 {
868 int status;
869 int child_locked = 0;
870 bool is_unlinkable = false;
871 struct inode *inode = d_inode(dentry);
872 struct inode *orphan_dir = NULL;
873 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
874 u64 blkno;
875 struct ocfs2_dinode *fe = NULL;
876 struct buffer_head *fe_bh = NULL;
877 struct buffer_head *parent_node_bh = NULL;
878 handle_t *handle = NULL;
879 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
880 struct ocfs2_dir_lookup_result lookup = { NULL, };
881 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
882
883 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
884 dentry->d_name.name,
885 (unsigned long long)OCFS2_I(dir)->ip_blkno,
886 (unsigned long long)OCFS2_I(inode)->ip_blkno);
887
888 status = dquot_initialize(dir);
889 if (status) {
890 mlog_errno(status);
891 return status;
892 }
893
894 BUG_ON(d_inode(dentry->d_parent) != dir);
895
896 if (inode == osb->root_inode)
897 return -EPERM;
898
899 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
900 OI_LS_PARENT);
901 if (status < 0) {
902 if (status != -ENOENT)
903 mlog_errno(status);
904 return status;
905 }
906
907 status = ocfs2_find_files_on_disk(dentry->d_name.name,
908 dentry->d_name.len, &blkno, dir,
909 &lookup);
910 if (status < 0) {
911 if (status != -ENOENT)
912 mlog_errno(status);
913 goto leave;
914 }
915
916 if (OCFS2_I(inode)->ip_blkno != blkno) {
917 status = -ENOENT;
918
919 trace_ocfs2_unlink_noent(
920 (unsigned long long)OCFS2_I(inode)->ip_blkno,
921 (unsigned long long)blkno,
922 OCFS2_I(inode)->ip_flags);
923 goto leave;
924 }
925
926 status = ocfs2_inode_lock(inode, &fe_bh, 1);
927 if (status < 0) {
928 if (status != -ENOENT)
929 mlog_errno(status);
930 goto leave;
931 }
932 child_locked = 1;
933
934 if (S_ISDIR(inode->i_mode)) {
935 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
936 status = -ENOTEMPTY;
937 goto leave;
938 }
939 }
940
941 status = ocfs2_remote_dentry_delete(dentry);
942 if (status < 0) {
943 /* This remote delete should succeed under all normal
944 * circumstances. */
945 mlog_errno(status);
946 goto leave;
947 }
948
949 if (ocfs2_inode_is_unlinkable(inode)) {
950 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
951 OCFS2_I(inode)->ip_blkno,
952 orphan_name, &orphan_insert,
953 false);
954 if (status < 0) {
955 mlog_errno(status);
956 goto leave;
957 }
958 is_unlinkable = true;
959 }
960
961 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
962 if (IS_ERR(handle)) {
963 status = PTR_ERR(handle);
964 handle = NULL;
965 mlog_errno(status);
966 goto leave;
967 }
968
969 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
970 OCFS2_JOURNAL_ACCESS_WRITE);
971 if (status < 0) {
972 mlog_errno(status);
973 goto leave;
974 }
975
976 fe = (struct ocfs2_dinode *) fe_bh->b_data;
977
978 /* delete the name from the parent dir */
979 status = ocfs2_delete_entry(handle, dir, &lookup);
980 if (status < 0) {
981 mlog_errno(status);
982 goto leave;
983 }
984
985 if (S_ISDIR(inode->i_mode))
986 drop_nlink(inode);
987 drop_nlink(inode);
988 ocfs2_set_links_count(fe, inode->i_nlink);
989 ocfs2_journal_dirty(handle, fe_bh);
990
991 dir->i_ctime = dir->i_mtime = current_time(dir);
992 if (S_ISDIR(inode->i_mode))
993 drop_nlink(dir);
994
995 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
996 if (status < 0) {
997 mlog_errno(status);
998 if (S_ISDIR(inode->i_mode))
999 inc_nlink(dir);
1000 goto leave;
1001 }
1002
1003 if (is_unlinkable) {
1004 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
1005 orphan_name, &orphan_insert, orphan_dir, false);
1006 if (status < 0)
1007 mlog_errno(status);
1008 }
1009
1010 leave:
1011 if (handle)
1012 ocfs2_commit_trans(osb, handle);
1013
1014 if (orphan_dir) {
1015 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1016 ocfs2_inode_unlock(orphan_dir, 1);
1017 inode_unlock(orphan_dir);
1018 iput(orphan_dir);
1019 }
1020
1021 if (child_locked)
1022 ocfs2_inode_unlock(inode, 1);
1023
1024 ocfs2_inode_unlock(dir, 1);
1025
1026 brelse(fe_bh);
1027 brelse(parent_node_bh);
1028
1029 ocfs2_free_dir_lookup_result(&orphan_insert);
1030 ocfs2_free_dir_lookup_result(&lookup);
1031
1032 if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
1033 mlog_errno(status);
1034
1035 return status;
1036 }
1037
1038 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb,
1039 u64 src_inode_no, u64 dest_inode_no)
1040 {
1041 int ret = 0, i = 0;
1042 u64 parent_inode_no = 0;
1043 u64 child_inode_no = src_inode_no;
1044 struct inode *child_inode;
1045
1046 #define MAX_LOOKUP_TIMES 32
1047 while (1) {
1048 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0);
1049 if (IS_ERR(child_inode)) {
1050 ret = PTR_ERR(child_inode);
1051 break;
1052 }
1053
1054 ret = ocfs2_inode_lock(child_inode, NULL, 0);
1055 if (ret < 0) {
1056 iput(child_inode);
1057 if (ret != -ENOENT)
1058 mlog_errno(ret);
1059 break;
1060 }
1061
1062 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2,
1063 &parent_inode_no);
1064 ocfs2_inode_unlock(child_inode, 0);
1065 iput(child_inode);
1066 if (ret < 0) {
1067 ret = -ENOENT;
1068 break;
1069 }
1070
1071 if (parent_inode_no == dest_inode_no) {
1072 ret = 1;
1073 break;
1074 }
1075
1076 if (parent_inode_no == osb->root_inode->i_ino) {
1077 ret = 0;
1078 break;
1079 }
1080
1081 child_inode_no = parent_inode_no;
1082
1083 if (++i >= MAX_LOOKUP_TIMES) {
1084 mlog(ML_NOTICE, "max lookup times reached, filesystem "
1085 "may have nested directories, "
1086 "src inode: %llu, dest inode: %llu.\n",
1087 (unsigned long long)src_inode_no,
1088 (unsigned long long)dest_inode_no);
1089 ret = 0;
1090 break;
1091 }
1092 }
1093
1094 return ret;
1095 }
1096
1097 /*
1098 * The only place this should be used is rename and link!
1099 * if they have the same id, then the 1st one is the only one locked.
1100 */
1101 static int ocfs2_double_lock(struct ocfs2_super *osb,
1102 struct buffer_head **bh1,
1103 struct inode *inode1,
1104 struct buffer_head **bh2,
1105 struct inode *inode2,
1106 int rename)
1107 {
1108 int status;
1109 int inode1_is_ancestor, inode2_is_ancestor;
1110 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
1111 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
1112
1113 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
1114 (unsigned long long)oi2->ip_blkno);
1115
1116 if (*bh1)
1117 *bh1 = NULL;
1118 if (*bh2)
1119 *bh2 = NULL;
1120
1121 /* we always want to lock the one with the lower lockid first.
1122 * and if they are nested, we lock ancestor first */
1123 if (oi1->ip_blkno != oi2->ip_blkno) {
1124 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno,
1125 oi1->ip_blkno);
1126 if (inode1_is_ancestor < 0) {
1127 status = inode1_is_ancestor;
1128 goto bail;
1129 }
1130
1131 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno,
1132 oi2->ip_blkno);
1133 if (inode2_is_ancestor < 0) {
1134 status = inode2_is_ancestor;
1135 goto bail;
1136 }
1137
1138 if ((inode1_is_ancestor == 1) ||
1139 (oi1->ip_blkno < oi2->ip_blkno &&
1140 inode2_is_ancestor == 0)) {
1141 /* switch id1 and id2 around */
1142 swap(bh2, bh1);
1143 swap(inode2, inode1);
1144 }
1145 /* lock id2 */
1146 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1147 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT);
1148 if (status < 0) {
1149 if (status != -ENOENT)
1150 mlog_errno(status);
1151 goto bail;
1152 }
1153 }
1154
1155 /* lock id1 */
1156 status = ocfs2_inode_lock_nested(inode1, bh1, 1,
1157 rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT);
1158 if (status < 0) {
1159 /*
1160 * An error return must mean that no cluster locks
1161 * were held on function exit.
1162 */
1163 if (oi1->ip_blkno != oi2->ip_blkno) {
1164 ocfs2_inode_unlock(inode2, 1);
1165 brelse(*bh2);
1166 *bh2 = NULL;
1167 }
1168
1169 if (status != -ENOENT)
1170 mlog_errno(status);
1171 }
1172
1173 trace_ocfs2_double_lock_end(
1174 (unsigned long long)oi1->ip_blkno,
1175 (unsigned long long)oi2->ip_blkno);
1176
1177 bail:
1178 if (status)
1179 mlog_errno(status);
1180 return status;
1181 }
1182
1183 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1184 {
1185 ocfs2_inode_unlock(inode1, 1);
1186
1187 if (inode1 != inode2)
1188 ocfs2_inode_unlock(inode2, 1);
1189 }
1190
1191 static int ocfs2_rename(struct inode *old_dir,
1192 struct dentry *old_dentry,
1193 struct inode *new_dir,
1194 struct dentry *new_dentry,
1195 unsigned int flags)
1196 {
1197 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1198 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1199 struct inode *old_inode = d_inode(old_dentry);
1200 struct inode *new_inode = d_inode(new_dentry);
1201 struct inode *orphan_dir = NULL;
1202 struct ocfs2_dinode *newfe = NULL;
1203 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1204 struct buffer_head *newfe_bh = NULL;
1205 struct buffer_head *old_inode_bh = NULL;
1206 struct ocfs2_super *osb = NULL;
1207 u64 newfe_blkno, old_de_ino;
1208 handle_t *handle = NULL;
1209 struct buffer_head *old_dir_bh = NULL;
1210 struct buffer_head *new_dir_bh = NULL;
1211 u32 old_dir_nlink = old_dir->i_nlink;
1212 struct ocfs2_dinode *old_di;
1213 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1214 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1215 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1216 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1217 struct ocfs2_dir_lookup_result target_insert = { NULL, };
1218 bool should_add_orphan = false;
1219
1220 if (flags)
1221 return -EINVAL;
1222
1223 /* At some point it might be nice to break this function up a
1224 * bit. */
1225
1226 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1227 old_dentry->d_name.len, old_dentry->d_name.name,
1228 new_dentry->d_name.len, new_dentry->d_name.name);
1229
1230 status = dquot_initialize(old_dir);
1231 if (status) {
1232 mlog_errno(status);
1233 goto bail;
1234 }
1235 status = dquot_initialize(new_dir);
1236 if (status) {
1237 mlog_errno(status);
1238 goto bail;
1239 }
1240
1241 osb = OCFS2_SB(old_dir->i_sb);
1242
1243 if (new_inode) {
1244 if (!igrab(new_inode))
1245 BUG();
1246 }
1247
1248 /* Assume a directory hierarchy thusly:
1249 * a/b/c
1250 * a/d
1251 * a,b,c, and d are all directories.
1252 *
1253 * from cwd of 'a' on both nodes:
1254 * node1: mv b/c d
1255 * node2: mv d b/c
1256 *
1257 * And that's why, just like the VFS, we need a file system
1258 * rename lock. */
1259 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1260 status = ocfs2_rename_lock(osb);
1261 if (status < 0) {
1262 mlog_errno(status);
1263 goto bail;
1264 }
1265 rename_lock = 1;
1266
1267 /* here we cannot guarantee the inodes haven't just been
1268 * changed, so check if they are nested again */
1269 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino,
1270 old_inode->i_ino);
1271 if (status < 0) {
1272 mlog_errno(status);
1273 goto bail;
1274 } else if (status == 1) {
1275 status = -EPERM;
1276 trace_ocfs2_rename_not_permitted(
1277 (unsigned long long)old_inode->i_ino,
1278 (unsigned long long)new_dir->i_ino);
1279 goto bail;
1280 }
1281 }
1282
1283 /* if old and new are the same, this'll just do one lock. */
1284 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1285 &new_dir_bh, new_dir, 1);
1286 if (status < 0) {
1287 mlog_errno(status);
1288 goto bail;
1289 }
1290 parents_locked = 1;
1291
1292 if (!new_dir->i_nlink) {
1293 status = -EACCES;
1294 goto bail;
1295 }
1296
1297 /* make sure both dirs have bhs
1298 * get an extra ref on old_dir_bh if old==new */
1299 if (!new_dir_bh) {
1300 if (old_dir_bh) {
1301 new_dir_bh = old_dir_bh;
1302 get_bh(new_dir_bh);
1303 } else {
1304 mlog(ML_ERROR, "no old_dir_bh!\n");
1305 status = -EIO;
1306 goto bail;
1307 }
1308 }
1309
1310 /*
1311 * Aside from allowing a meta data update, the locking here
1312 * also ensures that the downconvert thread on other nodes
1313 * won't have to concurrently downconvert the inode and the
1314 * dentry locks.
1315 */
1316 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1317 OI_LS_PARENT);
1318 if (status < 0) {
1319 if (status != -ENOENT)
1320 mlog_errno(status);
1321 goto bail;
1322 }
1323 old_child_locked = 1;
1324
1325 status = ocfs2_remote_dentry_delete(old_dentry);
1326 if (status < 0) {
1327 mlog_errno(status);
1328 goto bail;
1329 }
1330
1331 if (S_ISDIR(old_inode->i_mode)) {
1332 u64 old_inode_parent;
1333
1334 update_dot_dot = 1;
1335 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1336 old_inode,
1337 &old_inode_dot_dot_res);
1338 if (status) {
1339 status = -EIO;
1340 goto bail;
1341 }
1342
1343 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1344 status = -EIO;
1345 goto bail;
1346 }
1347
1348 if (!new_inode && new_dir != old_dir &&
1349 new_dir->i_nlink >= ocfs2_link_max(osb)) {
1350 status = -EMLINK;
1351 goto bail;
1352 }
1353 }
1354
1355 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1356 old_dentry->d_name.len,
1357 &old_de_ino);
1358 if (status) {
1359 status = -ENOENT;
1360 goto bail;
1361 }
1362
1363 /*
1364 * Check for inode number is _not_ due to possible IO errors.
1365 * We might rmdir the source, keep it as pwd of some process
1366 * and merrily kill the link to whatever was created under the
1367 * same name. Goodbye sticky bit ;-<
1368 */
1369 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1370 status = -ENOENT;
1371 goto bail;
1372 }
1373
1374 /* check if the target already exists (in which case we need
1375 * to delete it */
1376 status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1377 new_dentry->d_name.len,
1378 &newfe_blkno, new_dir,
1379 &target_lookup_res);
1380 /* The only error we allow here is -ENOENT because the new
1381 * file not existing is perfectly valid. */
1382 if ((status < 0) && (status != -ENOENT)) {
1383 /* If we cannot find the file specified we should just */
1384 /* return the error... */
1385 mlog_errno(status);
1386 goto bail;
1387 }
1388 if (status == 0)
1389 target_exists = 1;
1390
1391 if (!target_exists && new_inode) {
1392 /*
1393 * Target was unlinked by another node while we were
1394 * waiting to get to ocfs2_rename(). There isn't
1395 * anything we can do here to help the situation, so
1396 * bubble up the appropriate error.
1397 */
1398 status = -ENOENT;
1399 goto bail;
1400 }
1401
1402 /* In case we need to overwrite an existing file, we blow it
1403 * away first */
1404 if (target_exists) {
1405 /* VFS didn't think there existed an inode here, but
1406 * someone else in the cluster must have raced our
1407 * rename to create one. Today we error cleanly, in
1408 * the future we should consider calling iget to build
1409 * a new struct inode for this entry. */
1410 if (!new_inode) {
1411 status = -EACCES;
1412
1413 trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1414 new_dentry->d_name.name);
1415 goto bail;
1416 }
1417
1418 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1419 status = -EACCES;
1420
1421 trace_ocfs2_rename_disagree(
1422 (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1423 (unsigned long long)newfe_blkno,
1424 OCFS2_I(new_inode)->ip_flags);
1425 goto bail;
1426 }
1427
1428 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1429 if (status < 0) {
1430 if (status != -ENOENT)
1431 mlog_errno(status);
1432 goto bail;
1433 }
1434 new_child_locked = 1;
1435
1436 status = ocfs2_remote_dentry_delete(new_dentry);
1437 if (status < 0) {
1438 mlog_errno(status);
1439 goto bail;
1440 }
1441
1442 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1443
1444 trace_ocfs2_rename_over_existing(
1445 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1446 (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1447
1448 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1449 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1450 OCFS2_I(new_inode)->ip_blkno,
1451 orphan_name, &orphan_insert,
1452 false);
1453 if (status < 0) {
1454 mlog_errno(status);
1455 goto bail;
1456 }
1457 should_add_orphan = true;
1458 }
1459 } else {
1460 BUG_ON(d_inode(new_dentry->d_parent) != new_dir);
1461
1462 status = ocfs2_check_dir_for_entry(new_dir,
1463 new_dentry->d_name.name,
1464 new_dentry->d_name.len);
1465 if (status)
1466 goto bail;
1467
1468 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1469 new_dentry->d_name.name,
1470 new_dentry->d_name.len,
1471 &target_insert);
1472 if (status < 0) {
1473 mlog_errno(status);
1474 goto bail;
1475 }
1476 }
1477
1478 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1479 if (IS_ERR(handle)) {
1480 status = PTR_ERR(handle);
1481 handle = NULL;
1482 mlog_errno(status);
1483 goto bail;
1484 }
1485
1486 if (target_exists) {
1487 if (S_ISDIR(new_inode->i_mode)) {
1488 if (new_inode->i_nlink != 2 ||
1489 !ocfs2_empty_dir(new_inode)) {
1490 status = -ENOTEMPTY;
1491 goto bail;
1492 }
1493 }
1494 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1495 newfe_bh,
1496 OCFS2_JOURNAL_ACCESS_WRITE);
1497 if (status < 0) {
1498 mlog_errno(status);
1499 goto bail;
1500 }
1501
1502 /* change the dirent to point to the correct inode */
1503 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1504 old_inode);
1505 if (status < 0) {
1506 mlog_errno(status);
1507 goto bail;
1508 }
1509 inode_inc_iversion(new_dir);
1510
1511 if (S_ISDIR(new_inode->i_mode))
1512 ocfs2_set_links_count(newfe, 0);
1513 else
1514 ocfs2_add_links_count(newfe, -1);
1515 ocfs2_journal_dirty(handle, newfe_bh);
1516 if (should_add_orphan) {
1517 status = ocfs2_orphan_add(osb, handle, new_inode,
1518 newfe_bh, orphan_name,
1519 &orphan_insert, orphan_dir, false);
1520 if (status < 0) {
1521 mlog_errno(status);
1522 goto bail;
1523 }
1524 }
1525 } else {
1526 /* if the name was not found in new_dir, add it now */
1527 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1528 OCFS2_I(old_inode)->ip_blkno,
1529 new_dir_bh, &target_insert);
1530 }
1531
1532 old_inode->i_ctime = current_time(old_inode);
1533 mark_inode_dirty(old_inode);
1534
1535 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1536 old_inode_bh,
1537 OCFS2_JOURNAL_ACCESS_WRITE);
1538 if (status >= 0) {
1539 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1540
1541 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1542 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1543 ocfs2_journal_dirty(handle, old_inode_bh);
1544 } else
1545 mlog_errno(status);
1546
1547 /*
1548 * Now that the name has been added to new_dir, remove the old name.
1549 *
1550 * We don't keep any directory entry context around until now
1551 * because the insert might have changed the type of directory
1552 * we're dealing with.
1553 */
1554 status = ocfs2_find_entry(old_dentry->d_name.name,
1555 old_dentry->d_name.len, old_dir,
1556 &old_entry_lookup);
1557 if (status) {
1558 if (!is_journal_aborted(osb->journal->j_journal)) {
1559 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1560 "is not deleted.",
1561 new_dentry->d_name.len, new_dentry->d_name.name,
1562 old_dentry->d_name.len, old_dentry->d_name.name);
1563 }
1564 goto bail;
1565 }
1566
1567 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1568 if (status < 0) {
1569 mlog_errno(status);
1570 if (!is_journal_aborted(osb->journal->j_journal)) {
1571 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1572 "is not deleted.",
1573 new_dentry->d_name.len, new_dentry->d_name.name,
1574 old_dentry->d_name.len, old_dentry->d_name.name);
1575 }
1576 goto bail;
1577 }
1578
1579 if (new_inode) {
1580 drop_nlink(new_inode);
1581 new_inode->i_ctime = current_time(new_inode);
1582 }
1583 old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir);
1584
1585 if (update_dot_dot) {
1586 status = ocfs2_update_entry(old_inode, handle,
1587 &old_inode_dot_dot_res, new_dir);
1588 drop_nlink(old_dir);
1589 if (new_inode) {
1590 drop_nlink(new_inode);
1591 } else {
1592 inc_nlink(new_dir);
1593 mark_inode_dirty(new_dir);
1594 }
1595 }
1596 mark_inode_dirty(old_dir);
1597 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1598 if (new_inode) {
1599 mark_inode_dirty(new_inode);
1600 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1601 }
1602
1603 if (old_dir != new_dir) {
1604 /* Keep the same times on both directories.*/
1605 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1606
1607 /*
1608 * This will also pick up the i_nlink change from the
1609 * block above.
1610 */
1611 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1612 }
1613
1614 if (old_dir_nlink != old_dir->i_nlink) {
1615 if (!old_dir_bh) {
1616 mlog(ML_ERROR, "need to change nlink for old dir "
1617 "%llu from %d to %d but bh is NULL!\n",
1618 (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1619 (int)old_dir_nlink, old_dir->i_nlink);
1620 } else {
1621 struct ocfs2_dinode *fe;
1622 status = ocfs2_journal_access_di(handle,
1623 INODE_CACHE(old_dir),
1624 old_dir_bh,
1625 OCFS2_JOURNAL_ACCESS_WRITE);
1626 fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1627 ocfs2_set_links_count(fe, old_dir->i_nlink);
1628 ocfs2_journal_dirty(handle, old_dir_bh);
1629 }
1630 }
1631 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1632 status = 0;
1633 bail:
1634 if (handle)
1635 ocfs2_commit_trans(osb, handle);
1636
1637 if (orphan_dir) {
1638 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1639 ocfs2_inode_unlock(orphan_dir, 1);
1640 inode_unlock(orphan_dir);
1641 iput(orphan_dir);
1642 }
1643
1644 if (new_child_locked)
1645 ocfs2_inode_unlock(new_inode, 1);
1646
1647 if (old_child_locked)
1648 ocfs2_inode_unlock(old_inode, 1);
1649
1650 if (parents_locked)
1651 ocfs2_double_unlock(old_dir, new_dir);
1652
1653 if (rename_lock)
1654 ocfs2_rename_unlock(osb);
1655
1656 if (new_inode)
1657 sync_mapping_buffers(old_inode->i_mapping);
1658
1659 iput(new_inode);
1660
1661 ocfs2_free_dir_lookup_result(&target_lookup_res);
1662 ocfs2_free_dir_lookup_result(&old_entry_lookup);
1663 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1664 ocfs2_free_dir_lookup_result(&orphan_insert);
1665 ocfs2_free_dir_lookup_result(&target_insert);
1666
1667 brelse(newfe_bh);
1668 brelse(old_inode_bh);
1669 brelse(old_dir_bh);
1670 brelse(new_dir_bh);
1671
1672 if (status)
1673 mlog_errno(status);
1674
1675 return status;
1676 }
1677
1678 /*
1679 * we expect i_size = strlen(symname). Copy symname into the file
1680 * data, including the null terminator.
1681 */
1682 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1683 handle_t *handle,
1684 struct inode *inode,
1685 const char *symname)
1686 {
1687 struct buffer_head **bhs = NULL;
1688 const char *c;
1689 struct super_block *sb = osb->sb;
1690 u64 p_blkno, p_blocks;
1691 int virtual, blocks, status, i, bytes_left;
1692
1693 bytes_left = i_size_read(inode) + 1;
1694 /* we can't trust i_blocks because we're actually going to
1695 * write i_size + 1 bytes. */
1696 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1697
1698 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1699 i_size_read(inode), blocks);
1700
1701 /* Sanity check -- make sure we're going to fit. */
1702 if (bytes_left >
1703 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1704 status = -EIO;
1705 mlog_errno(status);
1706 goto bail;
1707 }
1708
1709 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1710 if (!bhs) {
1711 status = -ENOMEM;
1712 mlog_errno(status);
1713 goto bail;
1714 }
1715
1716 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1717 NULL);
1718 if (status < 0) {
1719 mlog_errno(status);
1720 goto bail;
1721 }
1722
1723 /* links can never be larger than one cluster so we know this
1724 * is all going to be contiguous, but do a sanity check
1725 * anyway. */
1726 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1727 status = -EIO;
1728 mlog_errno(status);
1729 goto bail;
1730 }
1731
1732 virtual = 0;
1733 while(bytes_left > 0) {
1734 c = &symname[virtual * sb->s_blocksize];
1735
1736 bhs[virtual] = sb_getblk(sb, p_blkno);
1737 if (!bhs[virtual]) {
1738 status = -ENOMEM;
1739 mlog_errno(status);
1740 goto bail;
1741 }
1742 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1743 bhs[virtual]);
1744
1745 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1746 bhs[virtual],
1747 OCFS2_JOURNAL_ACCESS_CREATE);
1748 if (status < 0) {
1749 mlog_errno(status);
1750 goto bail;
1751 }
1752
1753 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1754
1755 memcpy(bhs[virtual]->b_data, c,
1756 (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1757 bytes_left);
1758
1759 ocfs2_journal_dirty(handle, bhs[virtual]);
1760
1761 virtual++;
1762 p_blkno++;
1763 bytes_left -= sb->s_blocksize;
1764 }
1765
1766 status = 0;
1767 bail:
1768
1769 if (bhs) {
1770 for(i = 0; i < blocks; i++)
1771 brelse(bhs[i]);
1772 kfree(bhs);
1773 }
1774
1775 if (status)
1776 mlog_errno(status);
1777 return status;
1778 }
1779
1780 static int ocfs2_symlink(struct inode *dir,
1781 struct dentry *dentry,
1782 const char *symname)
1783 {
1784 int status, l, credits;
1785 u64 newsize;
1786 struct ocfs2_super *osb = NULL;
1787 struct inode *inode = NULL;
1788 struct super_block *sb;
1789 struct buffer_head *new_fe_bh = NULL;
1790 struct buffer_head *parent_fe_bh = NULL;
1791 struct ocfs2_dinode *fe = NULL;
1792 struct ocfs2_dinode *dirfe;
1793 handle_t *handle = NULL;
1794 struct ocfs2_alloc_context *inode_ac = NULL;
1795 struct ocfs2_alloc_context *data_ac = NULL;
1796 struct ocfs2_alloc_context *xattr_ac = NULL;
1797 int want_clusters = 0;
1798 int xattr_credits = 0;
1799 struct ocfs2_security_xattr_info si = {
1800 .enable = 1,
1801 };
1802 int did_quota = 0, did_quota_inode = 0;
1803 struct ocfs2_dir_lookup_result lookup = { NULL, };
1804 sigset_t oldset;
1805 int did_block_signals = 0;
1806 struct ocfs2_dentry_lock *dl = NULL;
1807
1808 trace_ocfs2_symlink_begin(dir, dentry, symname,
1809 dentry->d_name.len, dentry->d_name.name);
1810
1811 status = dquot_initialize(dir);
1812 if (status) {
1813 mlog_errno(status);
1814 goto bail;
1815 }
1816
1817 sb = dir->i_sb;
1818 osb = OCFS2_SB(sb);
1819
1820 l = strlen(symname) + 1;
1821
1822 credits = ocfs2_calc_symlink_credits(sb);
1823
1824 /* lock the parent directory */
1825 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1826 if (status < 0) {
1827 if (status != -ENOENT)
1828 mlog_errno(status);
1829 return status;
1830 }
1831
1832 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1833 if (!ocfs2_read_links_count(dirfe)) {
1834 /* can't make a file in a deleted directory. */
1835 status = -ENOENT;
1836 goto bail;
1837 }
1838
1839 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1840 dentry->d_name.len);
1841 if (status)
1842 goto bail;
1843
1844 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1845 dentry->d_name.name,
1846 dentry->d_name.len, &lookup);
1847 if (status < 0) {
1848 mlog_errno(status);
1849 goto bail;
1850 }
1851
1852 status = ocfs2_reserve_new_inode(osb, &inode_ac);
1853 if (status < 0) {
1854 if (status != -ENOSPC)
1855 mlog_errno(status);
1856 goto bail;
1857 }
1858
1859 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1860 if (IS_ERR(inode)) {
1861 status = PTR_ERR(inode);
1862 inode = NULL;
1863 mlog_errno(status);
1864 goto bail;
1865 }
1866
1867 /* get security xattr */
1868 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1869 if (status) {
1870 if (status == -EOPNOTSUPP)
1871 si.enable = 0;
1872 else {
1873 mlog_errno(status);
1874 goto bail;
1875 }
1876 }
1877
1878 /* calculate meta data/clusters for setting security xattr */
1879 if (si.enable) {
1880 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1881 &xattr_credits, &xattr_ac);
1882 if (status < 0) {
1883 mlog_errno(status);
1884 goto bail;
1885 }
1886 }
1887
1888 /* don't reserve bitmap space for fast symlinks. */
1889 if (l > ocfs2_fast_symlink_chars(sb))
1890 want_clusters += 1;
1891
1892 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1893 if (status < 0) {
1894 if (status != -ENOSPC)
1895 mlog_errno(status);
1896 goto bail;
1897 }
1898
1899 handle = ocfs2_start_trans(osb, credits + xattr_credits);
1900 if (IS_ERR(handle)) {
1901 status = PTR_ERR(handle);
1902 handle = NULL;
1903 mlog_errno(status);
1904 goto bail;
1905 }
1906
1907 /* Starting to change things, restart is no longer possible. */
1908 ocfs2_block_signals(&oldset);
1909 did_block_signals = 1;
1910
1911 status = dquot_alloc_inode(inode);
1912 if (status)
1913 goto bail;
1914 did_quota_inode = 1;
1915
1916 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1917 dentry->d_name.name,
1918 (unsigned long long)OCFS2_I(dir)->ip_blkno,
1919 inode->i_mode);
1920
1921 status = ocfs2_mknod_locked(osb, dir, inode,
1922 0, &new_fe_bh, parent_fe_bh, handle,
1923 inode_ac);
1924 if (status < 0) {
1925 mlog_errno(status);
1926 goto bail;
1927 }
1928
1929 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1930 inode->i_rdev = 0;
1931 newsize = l - 1;
1932 inode->i_op = &ocfs2_symlink_inode_operations;
1933 inode_nohighmem(inode);
1934 if (l > ocfs2_fast_symlink_chars(sb)) {
1935 u32 offset = 0;
1936
1937 status = dquot_alloc_space_nodirty(inode,
1938 ocfs2_clusters_to_bytes(osb->sb, 1));
1939 if (status)
1940 goto bail;
1941 did_quota = 1;
1942 inode->i_mapping->a_ops = &ocfs2_aops;
1943 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1944 new_fe_bh,
1945 handle, data_ac, NULL,
1946 NULL);
1947 if (status < 0) {
1948 if (status != -ENOSPC && status != -EINTR) {
1949 mlog(ML_ERROR,
1950 "Failed to extend file to %llu\n",
1951 (unsigned long long)newsize);
1952 mlog_errno(status);
1953 status = -ENOSPC;
1954 }
1955 goto bail;
1956 }
1957 i_size_write(inode, newsize);
1958 inode->i_blocks = ocfs2_inode_sector_count(inode);
1959 } else {
1960 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1961 memcpy((char *) fe->id2.i_symlink, symname, l);
1962 i_size_write(inode, newsize);
1963 inode->i_blocks = 0;
1964 }
1965
1966 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1967 if (status < 0) {
1968 mlog_errno(status);
1969 goto bail;
1970 }
1971
1972 if (!ocfs2_inode_is_fast_symlink(inode)) {
1973 status = ocfs2_create_symlink_data(osb, handle, inode,
1974 symname);
1975 if (status < 0) {
1976 mlog_errno(status);
1977 goto bail;
1978 }
1979 }
1980
1981 if (si.enable) {
1982 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1983 xattr_ac, data_ac);
1984 if (status < 0) {
1985 mlog_errno(status);
1986 goto bail;
1987 }
1988 }
1989
1990 /*
1991 * Do this before adding the entry to the directory. We add
1992 * also set d_op after success so that ->d_iput() will cleanup
1993 * the dentry lock even if ocfs2_add_entry() fails below.
1994 */
1995 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1996 if (status) {
1997 mlog_errno(status);
1998 goto bail;
1999 }
2000
2001 dl = dentry->d_fsdata;
2002
2003 status = ocfs2_add_entry(handle, dentry, inode,
2004 le64_to_cpu(fe->i_blkno), parent_fe_bh,
2005 &lookup);
2006 if (status < 0) {
2007 mlog_errno(status);
2008 goto bail;
2009 }
2010
2011 insert_inode_hash(inode);
2012 d_instantiate(dentry, inode);
2013 bail:
2014 if (status < 0 && did_quota)
2015 dquot_free_space_nodirty(inode,
2016 ocfs2_clusters_to_bytes(osb->sb, 1));
2017 if (status < 0 && did_quota_inode)
2018 dquot_free_inode(inode);
2019 if (handle)
2020 ocfs2_commit_trans(osb, handle);
2021
2022 ocfs2_inode_unlock(dir, 1);
2023 if (did_block_signals)
2024 ocfs2_unblock_signals(&oldset);
2025
2026 brelse(new_fe_bh);
2027 brelse(parent_fe_bh);
2028 kfree(si.value);
2029 ocfs2_free_dir_lookup_result(&lookup);
2030 if (inode_ac)
2031 ocfs2_free_alloc_context(inode_ac);
2032 if (data_ac)
2033 ocfs2_free_alloc_context(data_ac);
2034 if (xattr_ac)
2035 ocfs2_free_alloc_context(xattr_ac);
2036 if ((status < 0) && inode) {
2037 if (dl)
2038 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2039
2040 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
2041 clear_nlink(inode);
2042 iput(inode);
2043 }
2044
2045 if (status)
2046 mlog_errno(status);
2047
2048 return status;
2049 }
2050
2051 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2052 {
2053 int status, namelen;
2054
2055 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2056 (long long)blkno);
2057 if (namelen <= 0) {
2058 if (namelen)
2059 status = namelen;
2060 else
2061 status = -EINVAL;
2062 mlog_errno(status);
2063 goto bail;
2064 }
2065 if (namelen != OCFS2_ORPHAN_NAMELEN) {
2066 status = -EINVAL;
2067 mlog_errno(status);
2068 goto bail;
2069 }
2070
2071 trace_ocfs2_blkno_stringify(blkno, name, namelen);
2072
2073 status = 0;
2074 bail:
2075 if (status < 0)
2076 mlog_errno(status);
2077 return status;
2078 }
2079
2080 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2081 struct inode **ret_orphan_dir,
2082 struct buffer_head **ret_orphan_dir_bh)
2083 {
2084 struct inode *orphan_dir_inode;
2085 struct buffer_head *orphan_dir_bh = NULL;
2086 int ret = 0;
2087
2088 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2089 ORPHAN_DIR_SYSTEM_INODE,
2090 osb->slot_num);
2091 if (!orphan_dir_inode) {
2092 ret = -ENOENT;
2093 mlog_errno(ret);
2094 return ret;
2095 }
2096
2097 inode_lock(orphan_dir_inode);
2098
2099 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2100 if (ret < 0) {
2101 inode_unlock(orphan_dir_inode);
2102 iput(orphan_dir_inode);
2103
2104 mlog_errno(ret);
2105 return ret;
2106 }
2107
2108 *ret_orphan_dir = orphan_dir_inode;
2109 *ret_orphan_dir_bh = orphan_dir_bh;
2110
2111 return 0;
2112 }
2113
2114 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2115 struct buffer_head *orphan_dir_bh,
2116 u64 blkno,
2117 char *name,
2118 struct ocfs2_dir_lookup_result *lookup,
2119 bool dio)
2120 {
2121 int ret;
2122 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2123 int namelen = dio ?
2124 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2125 OCFS2_ORPHAN_NAMELEN;
2126
2127 if (dio) {
2128 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2129 OCFS2_DIO_ORPHAN_PREFIX);
2130 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2131 ret = -EINVAL;
2132 mlog_errno(ret);
2133 return ret;
2134 }
2135
2136 ret = ocfs2_blkno_stringify(blkno,
2137 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2138 } else
2139 ret = ocfs2_blkno_stringify(blkno, name);
2140 if (ret < 0) {
2141 mlog_errno(ret);
2142 return ret;
2143 }
2144
2145 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2146 orphan_dir_bh, name,
2147 namelen, lookup);
2148 if (ret < 0) {
2149 mlog_errno(ret);
2150 return ret;
2151 }
2152
2153 return 0;
2154 }
2155
2156 /**
2157 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2158 * insertion of an orphan.
2159 * @osb: ocfs2 file system
2160 * @ret_orphan_dir: Orphan dir inode - returned locked!
2161 * @blkno: Actual block number of the inode to be inserted into orphan dir.
2162 * @lookup: dir lookup result, to be passed back into functions like
2163 * ocfs2_orphan_add
2164 *
2165 * Returns zero on success and the ret_orphan_dir, name and lookup
2166 * fields will be populated.
2167 *
2168 * Returns non-zero on failure.
2169 */
2170 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2171 struct inode **ret_orphan_dir,
2172 u64 blkno,
2173 char *name,
2174 struct ocfs2_dir_lookup_result *lookup,
2175 bool dio)
2176 {
2177 struct inode *orphan_dir_inode = NULL;
2178 struct buffer_head *orphan_dir_bh = NULL;
2179 int ret = 0;
2180
2181 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2182 &orphan_dir_bh);
2183 if (ret < 0) {
2184 mlog_errno(ret);
2185 return ret;
2186 }
2187
2188 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2189 blkno, name, lookup, dio);
2190 if (ret < 0) {
2191 mlog_errno(ret);
2192 goto out;
2193 }
2194
2195 *ret_orphan_dir = orphan_dir_inode;
2196
2197 out:
2198 brelse(orphan_dir_bh);
2199
2200 if (ret) {
2201 ocfs2_inode_unlock(orphan_dir_inode, 1);
2202 inode_unlock(orphan_dir_inode);
2203 iput(orphan_dir_inode);
2204 }
2205
2206 if (ret)
2207 mlog_errno(ret);
2208 return ret;
2209 }
2210
2211 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2212 handle_t *handle,
2213 struct inode *inode,
2214 struct buffer_head *fe_bh,
2215 char *name,
2216 struct ocfs2_dir_lookup_result *lookup,
2217 struct inode *orphan_dir_inode,
2218 bool dio)
2219 {
2220 struct buffer_head *orphan_dir_bh = NULL;
2221 int status = 0;
2222 struct ocfs2_dinode *orphan_fe;
2223 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2224 int namelen = dio ?
2225 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2226 OCFS2_ORPHAN_NAMELEN;
2227
2228 trace_ocfs2_orphan_add_begin(
2229 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2230
2231 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2232 if (status < 0) {
2233 mlog_errno(status);
2234 goto leave;
2235 }
2236
2237 status = ocfs2_journal_access_di(handle,
2238 INODE_CACHE(orphan_dir_inode),
2239 orphan_dir_bh,
2240 OCFS2_JOURNAL_ACCESS_WRITE);
2241 if (status < 0) {
2242 mlog_errno(status);
2243 goto leave;
2244 }
2245
2246 /*
2247 * We're going to journal the change of i_flags and i_orphaned_slot.
2248 * It's safe anyway, though some callers may duplicate the journaling.
2249 * Journaling within the func just make the logic look more
2250 * straightforward.
2251 */
2252 status = ocfs2_journal_access_di(handle,
2253 INODE_CACHE(inode),
2254 fe_bh,
2255 OCFS2_JOURNAL_ACCESS_WRITE);
2256 if (status < 0) {
2257 mlog_errno(status);
2258 goto leave;
2259 }
2260
2261 /* we're a cluster, and nlink can change on disk from
2262 * underneath us... */
2263 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2264 if (S_ISDIR(inode->i_mode))
2265 ocfs2_add_links_count(orphan_fe, 1);
2266 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2267 ocfs2_journal_dirty(handle, orphan_dir_bh);
2268
2269 status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2270 namelen, inode,
2271 OCFS2_I(inode)->ip_blkno,
2272 orphan_dir_bh, lookup);
2273 if (status < 0) {
2274 mlog_errno(status);
2275 goto rollback;
2276 }
2277
2278 if (dio) {
2279 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan
2280 * slot.
2281 */
2282 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2283 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num);
2284 } else {
2285 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2286 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2287
2288 /* Record which orphan dir our inode now resides
2289 * in. delete_inode will use this to determine which orphan
2290 * dir to lock. */
2291 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2292 }
2293
2294 ocfs2_journal_dirty(handle, fe_bh);
2295
2296 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2297 osb->slot_num);
2298
2299 rollback:
2300 if (status < 0) {
2301 if (S_ISDIR(inode->i_mode))
2302 ocfs2_add_links_count(orphan_fe, -1);
2303 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2304 }
2305
2306 leave:
2307 brelse(orphan_dir_bh);
2308
2309 return status;
2310 }
2311
2312 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2313 int ocfs2_orphan_del(struct ocfs2_super *osb,
2314 handle_t *handle,
2315 struct inode *orphan_dir_inode,
2316 struct inode *inode,
2317 struct buffer_head *orphan_dir_bh,
2318 bool dio)
2319 {
2320 char name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2321 struct ocfs2_dinode *orphan_fe;
2322 int status = 0;
2323 struct ocfs2_dir_lookup_result lookup = { NULL, };
2324
2325 if (dio) {
2326 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2327 OCFS2_DIO_ORPHAN_PREFIX);
2328 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2329 status = -EINVAL;
2330 mlog_errno(status);
2331 return status;
2332 }
2333
2334 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno,
2335 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2336 } else
2337 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2338 if (status < 0) {
2339 mlog_errno(status);
2340 goto leave;
2341 }
2342
2343 trace_ocfs2_orphan_del(
2344 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2345 name, strlen(name));
2346
2347 status = ocfs2_journal_access_di(handle,
2348 INODE_CACHE(orphan_dir_inode),
2349 orphan_dir_bh,
2350 OCFS2_JOURNAL_ACCESS_WRITE);
2351 if (status < 0) {
2352 mlog_errno(status);
2353 goto leave;
2354 }
2355
2356 /* find it's spot in the orphan directory */
2357 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode,
2358 &lookup);
2359 if (status) {
2360 mlog_errno(status);
2361 goto leave;
2362 }
2363
2364 /* remove it from the orphan directory */
2365 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2366 if (status < 0) {
2367 mlog_errno(status);
2368 goto leave;
2369 }
2370
2371 /* do the i_nlink dance! :) */
2372 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2373 if (S_ISDIR(inode->i_mode))
2374 ocfs2_add_links_count(orphan_fe, -1);
2375 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2376 ocfs2_journal_dirty(handle, orphan_dir_bh);
2377
2378 leave:
2379 ocfs2_free_dir_lookup_result(&lookup);
2380
2381 if (status)
2382 mlog_errno(status);
2383 return status;
2384 }
2385
2386 /**
2387 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2388 * allocated file. This is different from the typical 'add to orphan dir'
2389 * operation in that the inode does not yet exist. This is a problem because
2390 * the orphan dir stringifies the inode block number to come up with it's
2391 * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2392 * problem. This function works around it by calling deeper into the orphan
2393 * and suballoc code than other callers. Use this only by necessity.
2394 * @dir: The directory which this inode will ultimately wind up under - not the
2395 * orphan dir!
2396 * @dir_bh: buffer_head the @dir inode block
2397 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2398 * with the string to be used for orphan dirent. Pass back to the orphan dir
2399 * code.
2400 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2401 * dir code.
2402 * @ret_di_blkno: block number where the new inode will be allocated.
2403 * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2404 * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2405 *
2406 * Returns zero on success and the ret_orphan_dir, name and lookup
2407 * fields will be populated.
2408 *
2409 * Returns non-zero on failure.
2410 */
2411 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2412 struct buffer_head *dir_bh,
2413 char *orphan_name,
2414 struct inode **ret_orphan_dir,
2415 u64 *ret_di_blkno,
2416 struct ocfs2_dir_lookup_result *orphan_insert,
2417 struct ocfs2_alloc_context **ret_inode_ac)
2418 {
2419 int ret;
2420 u64 di_blkno;
2421 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2422 struct inode *orphan_dir = NULL;
2423 struct buffer_head *orphan_dir_bh = NULL;
2424 struct ocfs2_alloc_context *inode_ac = NULL;
2425
2426 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2427 if (ret < 0) {
2428 mlog_errno(ret);
2429 return ret;
2430 }
2431
2432 /* reserve an inode spot */
2433 ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2434 if (ret < 0) {
2435 if (ret != -ENOSPC)
2436 mlog_errno(ret);
2437 goto out;
2438 }
2439
2440 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2441 &di_blkno);
2442 if (ret) {
2443 mlog_errno(ret);
2444 goto out;
2445 }
2446
2447 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2448 di_blkno, orphan_name, orphan_insert,
2449 false);
2450 if (ret < 0) {
2451 mlog_errno(ret);
2452 goto out;
2453 }
2454
2455 out:
2456 if (ret == 0) {
2457 *ret_orphan_dir = orphan_dir;
2458 *ret_di_blkno = di_blkno;
2459 *ret_inode_ac = inode_ac;
2460 /*
2461 * orphan_name and orphan_insert are already up to
2462 * date via prepare_orphan_dir
2463 */
2464 } else {
2465 /* Unroll reserve_new_inode* */
2466 if (inode_ac)
2467 ocfs2_free_alloc_context(inode_ac);
2468
2469 /* Unroll orphan dir locking */
2470 inode_unlock(orphan_dir);
2471 ocfs2_inode_unlock(orphan_dir, 1);
2472 iput(orphan_dir);
2473 }
2474
2475 brelse(orphan_dir_bh);
2476
2477 return ret;
2478 }
2479
2480 int ocfs2_create_inode_in_orphan(struct inode *dir,
2481 int mode,
2482 struct inode **new_inode)
2483 {
2484 int status, did_quota_inode = 0;
2485 struct inode *inode = NULL;
2486 struct inode *orphan_dir = NULL;
2487 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2488 handle_t *handle = NULL;
2489 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2490 struct buffer_head *parent_di_bh = NULL;
2491 struct buffer_head *new_di_bh = NULL;
2492 struct ocfs2_alloc_context *inode_ac = NULL;
2493 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2494 u64 uninitialized_var(di_blkno), suballoc_loc;
2495 u16 suballoc_bit;
2496
2497 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2498 if (status < 0) {
2499 if (status != -ENOENT)
2500 mlog_errno(status);
2501 return status;
2502 }
2503
2504 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2505 orphan_name, &orphan_dir,
2506 &di_blkno, &orphan_insert, &inode_ac);
2507 if (status < 0) {
2508 if (status != -ENOSPC)
2509 mlog_errno(status);
2510 goto leave;
2511 }
2512
2513 inode = ocfs2_get_init_inode(dir, mode);
2514 if (IS_ERR(inode)) {
2515 status = PTR_ERR(inode);
2516 inode = NULL;
2517 mlog_errno(status);
2518 goto leave;
2519 }
2520
2521 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2522 if (IS_ERR(handle)) {
2523 status = PTR_ERR(handle);
2524 handle = NULL;
2525 mlog_errno(status);
2526 goto leave;
2527 }
2528
2529 status = dquot_alloc_inode(inode);
2530 if (status)
2531 goto leave;
2532 did_quota_inode = 1;
2533
2534 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2535 &suballoc_loc,
2536 &suballoc_bit, di_blkno);
2537 if (status < 0) {
2538 mlog_errno(status);
2539 goto leave;
2540 }
2541
2542 clear_nlink(inode);
2543 /* do the real work now. */
2544 status = __ocfs2_mknod_locked(dir, inode,
2545 0, &new_di_bh, parent_di_bh, handle,
2546 inode_ac, di_blkno, suballoc_loc,
2547 suballoc_bit);
2548 if (status < 0) {
2549 mlog_errno(status);
2550 goto leave;
2551 }
2552
2553 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2554 &orphan_insert, orphan_dir, false);
2555 if (status < 0) {
2556 mlog_errno(status);
2557 goto leave;
2558 }
2559
2560 /* get open lock so that only nodes can't remove it from orphan dir. */
2561 status = ocfs2_open_lock(inode);
2562 if (status < 0)
2563 mlog_errno(status);
2564
2565 insert_inode_hash(inode);
2566 leave:
2567 if (status < 0 && did_quota_inode)
2568 dquot_free_inode(inode);
2569 if (handle)
2570 ocfs2_commit_trans(osb, handle);
2571
2572 if (orphan_dir) {
2573 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2574 ocfs2_inode_unlock(orphan_dir, 1);
2575 inode_unlock(orphan_dir);
2576 iput(orphan_dir);
2577 }
2578
2579 if ((status < 0) && inode) {
2580 clear_nlink(inode);
2581 iput(inode);
2582 }
2583
2584 if (inode_ac)
2585 ocfs2_free_alloc_context(inode_ac);
2586
2587 brelse(new_di_bh);
2588
2589 if (!status)
2590 *new_inode = inode;
2591
2592 ocfs2_free_dir_lookup_result(&orphan_insert);
2593
2594 ocfs2_inode_unlock(dir, 1);
2595 brelse(parent_di_bh);
2596 return status;
2597 }
2598
2599 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
2600 struct inode *inode)
2601 {
2602 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2603 struct inode *orphan_dir_inode = NULL;
2604 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2605 struct buffer_head *di_bh = NULL;
2606 int status = 0;
2607 handle_t *handle = NULL;
2608 struct ocfs2_dinode *di = NULL;
2609
2610 status = ocfs2_inode_lock(inode, &di_bh, 1);
2611 if (status < 0) {
2612 mlog_errno(status);
2613 goto bail;
2614 }
2615
2616 di = (struct ocfs2_dinode *) di_bh->b_data;
2617 /*
2618 * Another append dio crashed?
2619 * If so, manually recover it first.
2620 */
2621 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
2622 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode));
2623 if (status < 0) {
2624 if (status != -ENOSPC)
2625 mlog_errno(status);
2626 goto bail_unlock_inode;
2627 }
2628
2629 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0);
2630 if (status < 0) {
2631 mlog_errno(status);
2632 goto bail_unlock_inode;
2633 }
2634 }
2635
2636 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
2637 OCFS2_I(inode)->ip_blkno,
2638 orphan_name,
2639 &orphan_insert,
2640 true);
2641 if (status < 0) {
2642 mlog_errno(status);
2643 goto bail_unlock_inode;
2644 }
2645
2646 handle = ocfs2_start_trans(osb,
2647 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS);
2648 if (IS_ERR(handle)) {
2649 status = PTR_ERR(handle);
2650 goto bail_unlock_orphan;
2651 }
2652
2653 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
2654 &orphan_insert, orphan_dir_inode, true);
2655 if (status)
2656 mlog_errno(status);
2657
2658 ocfs2_commit_trans(osb, handle);
2659
2660 bail_unlock_orphan:
2661 ocfs2_inode_unlock(orphan_dir_inode, 1);
2662 inode_unlock(orphan_dir_inode);
2663 iput(orphan_dir_inode);
2664
2665 ocfs2_free_dir_lookup_result(&orphan_insert);
2666
2667 bail_unlock_inode:
2668 ocfs2_inode_unlock(inode, 1);
2669 brelse(di_bh);
2670
2671 bail:
2672 return status;
2673 }
2674
2675 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
2676 struct inode *inode, struct buffer_head *di_bh,
2677 int update_isize, loff_t end)
2678 {
2679 struct inode *orphan_dir_inode = NULL;
2680 struct buffer_head *orphan_dir_bh = NULL;
2681 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2682 handle_t *handle = NULL;
2683 int status = 0;
2684
2685 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2686 ORPHAN_DIR_SYSTEM_INODE,
2687 le16_to_cpu(di->i_dio_orphaned_slot));
2688 if (!orphan_dir_inode) {
2689 status = -ENOENT;
2690 mlog_errno(status);
2691 goto bail;
2692 }
2693
2694 inode_lock(orphan_dir_inode);
2695 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2696 if (status < 0) {
2697 inode_unlock(orphan_dir_inode);
2698 iput(orphan_dir_inode);
2699 mlog_errno(status);
2700 goto bail;
2701 }
2702
2703 handle = ocfs2_start_trans(osb,
2704 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS);
2705 if (IS_ERR(handle)) {
2706 status = PTR_ERR(handle);
2707 goto bail_unlock_orphan;
2708 }
2709
2710 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)));
2711
2712 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
2713 inode, orphan_dir_bh, true);
2714 if (status < 0) {
2715 mlog_errno(status);
2716 goto bail_commit;
2717 }
2718
2719 status = ocfs2_journal_access_di(handle,
2720 INODE_CACHE(inode),
2721 di_bh,
2722 OCFS2_JOURNAL_ACCESS_WRITE);
2723 if (status < 0) {
2724 mlog_errno(status);
2725 goto bail_commit;
2726 }
2727
2728 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2729 di->i_dio_orphaned_slot = 0;
2730
2731 if (update_isize) {
2732 status = ocfs2_set_inode_size(handle, inode, di_bh, end);
2733 if (status)
2734 mlog_errno(status);
2735 } else
2736 ocfs2_journal_dirty(handle, di_bh);
2737
2738 bail_commit:
2739 ocfs2_commit_trans(osb, handle);
2740
2741 bail_unlock_orphan:
2742 ocfs2_inode_unlock(orphan_dir_inode, 1);
2743 inode_unlock(orphan_dir_inode);
2744 brelse(orphan_dir_bh);
2745 iput(orphan_dir_inode);
2746
2747 bail:
2748 return status;
2749 }
2750
2751 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2752 struct inode *inode,
2753 struct dentry *dentry)
2754 {
2755 int status = 0;
2756 struct buffer_head *parent_di_bh = NULL;
2757 handle_t *handle = NULL;
2758 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2759 struct ocfs2_dinode *dir_di, *di;
2760 struct inode *orphan_dir_inode = NULL;
2761 struct buffer_head *orphan_dir_bh = NULL;
2762 struct buffer_head *di_bh = NULL;
2763 struct ocfs2_dir_lookup_result lookup = { NULL, };
2764
2765 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2766 dentry->d_name.len, dentry->d_name.name,
2767 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2768 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2769
2770 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2771 if (status < 0) {
2772 if (status != -ENOENT)
2773 mlog_errno(status);
2774 return status;
2775 }
2776
2777 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2778 if (!dir_di->i_links_count) {
2779 /* can't make a file in a deleted directory. */
2780 status = -ENOENT;
2781 goto leave;
2782 }
2783
2784 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2785 dentry->d_name.len);
2786 if (status)
2787 goto leave;
2788
2789 /* get a spot inside the dir. */
2790 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2791 dentry->d_name.name,
2792 dentry->d_name.len, &lookup);
2793 if (status < 0) {
2794 mlog_errno(status);
2795 goto leave;
2796 }
2797
2798 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2799 ORPHAN_DIR_SYSTEM_INODE,
2800 osb->slot_num);
2801 if (!orphan_dir_inode) {
2802 status = -ENOENT;
2803 mlog_errno(status);
2804 goto leave;
2805 }
2806
2807 inode_lock(orphan_dir_inode);
2808
2809 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2810 if (status < 0) {
2811 mlog_errno(status);
2812 inode_unlock(orphan_dir_inode);
2813 iput(orphan_dir_inode);
2814 goto leave;
2815 }
2816
2817 status = ocfs2_read_inode_block(inode, &di_bh);
2818 if (status < 0) {
2819 mlog_errno(status);
2820 goto orphan_unlock;
2821 }
2822
2823 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2824 if (IS_ERR(handle)) {
2825 status = PTR_ERR(handle);
2826 handle = NULL;
2827 mlog_errno(status);
2828 goto orphan_unlock;
2829 }
2830
2831 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2832 di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2833 if (status < 0) {
2834 mlog_errno(status);
2835 goto out_commit;
2836 }
2837
2838 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2839 orphan_dir_bh, false);
2840 if (status < 0) {
2841 mlog_errno(status);
2842 goto out_commit;
2843 }
2844
2845 di = (struct ocfs2_dinode *)di_bh->b_data;
2846 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2847 di->i_orphaned_slot = 0;
2848 set_nlink(inode, 1);
2849 ocfs2_set_links_count(di, inode->i_nlink);
2850 ocfs2_update_inode_fsync_trans(handle, inode, 1);
2851 ocfs2_journal_dirty(handle, di_bh);
2852
2853 status = ocfs2_add_entry(handle, dentry, inode,
2854 OCFS2_I(inode)->ip_blkno, parent_di_bh,
2855 &lookup);
2856 if (status < 0) {
2857 mlog_errno(status);
2858 goto out_commit;
2859 }
2860
2861 status = ocfs2_dentry_attach_lock(dentry, inode,
2862 OCFS2_I(dir)->ip_blkno);
2863 if (status) {
2864 mlog_errno(status);
2865 goto out_commit;
2866 }
2867
2868 d_instantiate(dentry, inode);
2869 status = 0;
2870 out_commit:
2871 ocfs2_commit_trans(osb, handle);
2872 orphan_unlock:
2873 ocfs2_inode_unlock(orphan_dir_inode, 1);
2874 inode_unlock(orphan_dir_inode);
2875 iput(orphan_dir_inode);
2876 leave:
2877
2878 ocfs2_inode_unlock(dir, 1);
2879
2880 brelse(di_bh);
2881 brelse(parent_di_bh);
2882 brelse(orphan_dir_bh);
2883
2884 ocfs2_free_dir_lookup_result(&lookup);
2885
2886 if (status)
2887 mlog_errno(status);
2888
2889 return status;
2890 }
2891
2892 const struct inode_operations ocfs2_dir_iops = {
2893 .create = ocfs2_create,
2894 .lookup = ocfs2_lookup,
2895 .link = ocfs2_link,
2896 .unlink = ocfs2_unlink,
2897 .rmdir = ocfs2_unlink,
2898 .symlink = ocfs2_symlink,
2899 .mkdir = ocfs2_mkdir,
2900 .mknod = ocfs2_mknod,
2901 .rename = ocfs2_rename,
2902 .setattr = ocfs2_setattr,
2903 .getattr = ocfs2_getattr,
2904 .permission = ocfs2_permission,
2905 .listxattr = ocfs2_listxattr,
2906 .fiemap = ocfs2_fiemap,
2907 .get_acl = ocfs2_iop_get_acl,
2908 .set_acl = ocfs2_iop_set_acl,
2909 };
Linux with added FPC-III support