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
ocfs2_lookup(struct inode * dir,struct dentry * dentry,unsigned int flags)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
ocfs2_get_init_inode(struct inode * dir,umode_t mode)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 iput(inode);
205 return ERR_PTR(status);
206 }
207
208 return inode;
209 }
210
ocfs2_cleanup_add_entry_failure(struct ocfs2_super * osb,struct dentry * dentry,struct inode * inode)211 static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb,
212 struct dentry *dentry, struct inode *inode)
213 {
214 struct ocfs2_dentry_lock *dl = dentry->d_fsdata;
215
216 ocfs2_simple_drop_lockres(osb, &dl->dl_lockres);
217 ocfs2_lock_res_free(&dl->dl_lockres);
218 BUG_ON(dl->dl_count != 1);
219 spin_lock(&dentry_attach_lock);
220 dentry->d_fsdata = NULL;
221 spin_unlock(&dentry_attach_lock);
222 kfree(dl);
223 iput(inode);
224 }
225
ocfs2_mknod(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,umode_t mode,dev_t dev)226 static int ocfs2_mknod(struct mnt_idmap *idmap,
227 struct inode *dir,
228 struct dentry *dentry,
229 umode_t mode,
230 dev_t dev)
231 {
232 int status = 0;
233 struct buffer_head *parent_fe_bh = NULL;
234 handle_t *handle = NULL;
235 struct ocfs2_super *osb;
236 struct ocfs2_dinode *dirfe;
237 struct ocfs2_dinode *fe = NULL;
238 struct buffer_head *new_fe_bh = NULL;
239 struct inode *inode = NULL;
240 struct ocfs2_alloc_context *inode_ac = NULL;
241 struct ocfs2_alloc_context *data_ac = NULL;
242 struct ocfs2_alloc_context *meta_ac = NULL;
243 int want_clusters = 0;
244 int want_meta = 0;
245 int xattr_credits = 0;
246 struct ocfs2_security_xattr_info si = {
247 .name = NULL,
248 .enable = 1,
249 };
250 int did_quota_inode = 0;
251 struct ocfs2_dir_lookup_result lookup = { NULL, };
252 sigset_t oldset;
253 int did_block_signals = 0;
254 struct ocfs2_dentry_lock *dl = NULL;
255
256 trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
257 (unsigned long long)OCFS2_I(dir)->ip_blkno,
258 (unsigned long)dev, mode);
259
260 status = dquot_initialize(dir);
261 if (status) {
262 mlog_errno(status);
263 return status;
264 }
265
266 /* get our super block */
267 osb = OCFS2_SB(dir->i_sb);
268
269 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
270 if (status < 0) {
271 if (status != -ENOENT)
272 mlog_errno(status);
273 return status;
274 }
275
276 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
277 status = -EMLINK;
278 goto leave;
279 }
280
281 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
282 if (!ocfs2_read_links_count(dirfe)) {
283 /* can't make a file in a deleted directory. */
284 status = -ENOENT;
285 goto leave;
286 }
287
288 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
289 dentry->d_name.len);
290 if (status)
291 goto leave;
292
293 /* get a spot inside the dir. */
294 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
295 dentry->d_name.name,
296 dentry->d_name.len, &lookup);
297 if (status < 0) {
298 mlog_errno(status);
299 goto leave;
300 }
301
302 /* reserve an inode spot */
303 status = ocfs2_reserve_new_inode(osb, &inode_ac);
304 if (status < 0) {
305 if (status != -ENOSPC)
306 mlog_errno(status);
307 goto leave;
308 }
309
310 inode = ocfs2_get_init_inode(dir, mode);
311 if (IS_ERR(inode)) {
312 status = PTR_ERR(inode);
313 inode = NULL;
314 mlog_errno(status);
315 goto leave;
316 }
317
318 /* get security xattr */
319 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
320 if (status) {
321 if (status == -EOPNOTSUPP)
322 si.enable = 0;
323 else {
324 mlog_errno(status);
325 goto leave;
326 }
327 }
328
329 /* calculate meta data/clusters for setting security and acl xattr */
330 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
331 &si, &want_clusters,
332 &xattr_credits, &want_meta);
333 if (status < 0) {
334 mlog_errno(status);
335 goto leave;
336 }
337
338 /* Reserve a cluster if creating an extent based directory. */
339 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
340 want_clusters += 1;
341
342 /* Dir indexing requires extra space as well */
343 if (ocfs2_supports_indexed_dirs(osb))
344 want_meta++;
345 }
346
347 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
348 if (status < 0) {
349 if (status != -ENOSPC)
350 mlog_errno(status);
351 goto leave;
352 }
353
354 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
355 if (status < 0) {
356 if (status != -ENOSPC)
357 mlog_errno(status);
358 goto leave;
359 }
360
361 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
362 S_ISDIR(mode),
363 xattr_credits));
364 if (IS_ERR(handle)) {
365 status = PTR_ERR(handle);
366 handle = NULL;
367 mlog_errno(status);
368 goto leave;
369 }
370
371 /* Starting to change things, restart is no longer possible. */
372 ocfs2_block_signals(&oldset);
373 did_block_signals = 1;
374
375 status = dquot_alloc_inode(inode);
376 if (status)
377 goto leave;
378 did_quota_inode = 1;
379
380 /* do the real work now. */
381 status = ocfs2_mknod_locked(osb, dir, inode, dev,
382 &new_fe_bh, parent_fe_bh, handle,
383 inode_ac);
384 if (status < 0) {
385 mlog_errno(status);
386 goto leave;
387 }
388
389 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
390 if (S_ISDIR(mode)) {
391 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
392 new_fe_bh, data_ac, meta_ac);
393 if (status < 0) {
394 mlog_errno(status);
395 goto leave;
396 }
397
398 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
399 parent_fe_bh,
400 OCFS2_JOURNAL_ACCESS_WRITE);
401 if (status < 0) {
402 mlog_errno(status);
403 goto leave;
404 }
405 ocfs2_add_links_count(dirfe, 1);
406 ocfs2_journal_dirty(handle, parent_fe_bh);
407 inc_nlink(dir);
408 }
409
410 status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
411 meta_ac, data_ac);
412
413 if (status < 0) {
414 mlog_errno(status);
415 goto roll_back;
416 }
417
418 if (si.enable) {
419 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
420 meta_ac, data_ac);
421 if (status < 0) {
422 mlog_errno(status);
423 goto roll_back;
424 }
425 }
426
427 /*
428 * Do this before adding the entry to the directory. We add
429 * also set d_op after success so that ->d_iput() will cleanup
430 * the dentry lock even if ocfs2_add_entry() fails below.
431 */
432 status = ocfs2_dentry_attach_lock(dentry, inode,
433 OCFS2_I(dir)->ip_blkno);
434 if (status) {
435 mlog_errno(status);
436 goto roll_back;
437 }
438
439 dl = dentry->d_fsdata;
440
441 status = ocfs2_add_entry(handle, dentry, inode,
442 OCFS2_I(inode)->ip_blkno, parent_fe_bh,
443 &lookup);
444 if (status < 0) {
445 mlog_errno(status);
446 goto roll_back;
447 }
448
449 insert_inode_hash(inode);
450 d_instantiate(dentry, inode);
451 status = 0;
452
453 roll_back:
454 if (status < 0 && S_ISDIR(mode)) {
455 ocfs2_add_links_count(dirfe, -1);
456 drop_nlink(dir);
457 }
458
459 leave:
460 if (status < 0 && did_quota_inode)
461 dquot_free_inode(inode);
462 if (handle) {
463 if (status < 0 && fe)
464 ocfs2_set_links_count(fe, 0);
465 ocfs2_commit_trans(osb, handle);
466 }
467
468 ocfs2_inode_unlock(dir, 1);
469 if (did_block_signals)
470 ocfs2_unblock_signals(&oldset);
471
472 brelse(new_fe_bh);
473 brelse(parent_fe_bh);
474 kfree(si.value);
475
476 ocfs2_free_dir_lookup_result(&lookup);
477
478 if (inode_ac)
479 ocfs2_free_alloc_context(inode_ac);
480
481 if (data_ac)
482 ocfs2_free_alloc_context(data_ac);
483
484 if (meta_ac)
485 ocfs2_free_alloc_context(meta_ac);
486
487 /*
488 * We should call iput after the i_rwsem of the bitmap been
489 * unlocked in ocfs2_free_alloc_context, or the
490 * ocfs2_delete_inode will mutex_lock again.
491 */
492 if ((status < 0) && inode) {
493 if (dl)
494 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
495
496 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
497 clear_nlink(inode);
498 iput(inode);
499 }
500
501 if (status)
502 mlog_errno(status);
503
504 return status;
505 }
506
__ocfs2_mknod_locked(struct inode * dir,struct inode * inode,dev_t dev,struct buffer_head ** new_fe_bh,struct buffer_head * parent_fe_bh,handle_t * handle,struct ocfs2_alloc_context * inode_ac,u64 fe_blkno,u64 suballoc_loc,u16 suballoc_bit)507 static int __ocfs2_mknod_locked(struct inode *dir,
508 struct inode *inode,
509 dev_t dev,
510 struct buffer_head **new_fe_bh,
511 struct buffer_head *parent_fe_bh,
512 handle_t *handle,
513 struct ocfs2_alloc_context *inode_ac,
514 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
515 {
516 int status = 0;
517 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
518 struct ocfs2_dinode *fe = NULL;
519 struct ocfs2_extent_list *fel;
520 u16 feat;
521 struct ocfs2_inode_info *oi = OCFS2_I(inode);
522 struct timespec64 ts;
523
524 *new_fe_bh = NULL;
525
526 /* populate as many fields early on as possible - many of
527 * these are used by the support functions here and in
528 * callers. */
529 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
530 oi->ip_blkno = fe_blkno;
531 spin_lock(&osb->osb_lock);
532 inode->i_generation = osb->s_next_generation++;
533 spin_unlock(&osb->osb_lock);
534
535 *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
536 if (!*new_fe_bh) {
537 status = -ENOMEM;
538 mlog_errno(status);
539 goto leave;
540 }
541 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
542
543 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
544 *new_fe_bh,
545 OCFS2_JOURNAL_ACCESS_CREATE);
546 if (status < 0) {
547 mlog_errno(status);
548 goto leave;
549 }
550
551 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
552 memset(fe, 0, osb->sb->s_blocksize);
553
554 fe->i_generation = cpu_to_le32(inode->i_generation);
555 fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
556 fe->i_blkno = cpu_to_le64(fe_blkno);
557 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
558 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
559 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
560 fe->i_uid = cpu_to_le32(i_uid_read(inode));
561 fe->i_gid = cpu_to_le32(i_gid_read(inode));
562 fe->i_mode = cpu_to_le16(inode->i_mode);
563 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
564 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
565
566 ocfs2_set_links_count(fe, inode->i_nlink);
567
568 fe->i_last_eb_blk = 0;
569 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
570 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
571 ktime_get_coarse_real_ts64(&ts);
572 fe->i_atime = fe->i_ctime = fe->i_mtime =
573 cpu_to_le64(ts.tv_sec);
574 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
575 cpu_to_le32(ts.tv_nsec);
576 fe->i_dtime = 0;
577
578 /*
579 * If supported, directories start with inline data. If inline
580 * isn't supported, but indexing is, we start them as indexed.
581 */
582 feat = le16_to_cpu(fe->i_dyn_features);
583 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
584 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
585
586 fe->id2.i_data.id_count = cpu_to_le16(
587 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
588 } else {
589 fel = &fe->id2.i_list;
590 fel->l_tree_depth = 0;
591 fel->l_next_free_rec = 0;
592 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
593 }
594
595 ocfs2_journal_dirty(handle, *new_fe_bh);
596
597 ocfs2_populate_inode(inode, fe, 1);
598 ocfs2_ci_set_new(osb, INODE_CACHE(inode));
599 if (!ocfs2_mount_local(osb)) {
600 status = ocfs2_create_new_inode_locks(inode);
601 if (status < 0)
602 mlog_errno(status);
603 }
604
605 ocfs2_update_inode_fsync_trans(handle, inode, 1);
606
607 leave:
608 if (status < 0) {
609 if (*new_fe_bh) {
610 brelse(*new_fe_bh);
611 *new_fe_bh = NULL;
612 }
613 }
614
615 if (status)
616 mlog_errno(status);
617 return status;
618 }
619
ocfs2_mknod_locked(struct ocfs2_super * osb,struct inode * dir,struct inode * inode,dev_t dev,struct buffer_head ** new_fe_bh,struct buffer_head * parent_fe_bh,handle_t * handle,struct ocfs2_alloc_context * inode_ac)620 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
621 struct inode *dir,
622 struct inode *inode,
623 dev_t dev,
624 struct buffer_head **new_fe_bh,
625 struct buffer_head *parent_fe_bh,
626 handle_t *handle,
627 struct ocfs2_alloc_context *inode_ac)
628 {
629 int status = 0;
630 u64 suballoc_loc, fe_blkno = 0;
631 u16 suballoc_bit;
632
633 *new_fe_bh = NULL;
634
635 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
636 inode_ac, &suballoc_loc,
637 &suballoc_bit, &fe_blkno);
638 if (status < 0) {
639 mlog_errno(status);
640 return status;
641 }
642
643 return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
644 parent_fe_bh, handle, inode_ac,
645 fe_blkno, suballoc_loc, suballoc_bit);
646 }
647
ocfs2_mkdir(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,umode_t mode)648 static int ocfs2_mkdir(struct mnt_idmap *idmap,
649 struct inode *dir,
650 struct dentry *dentry,
651 umode_t mode)
652 {
653 int ret;
654
655 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
656 OCFS2_I(dir)->ip_blkno, mode);
657 ret = ocfs2_mknod(&nop_mnt_idmap, dir, dentry, mode | S_IFDIR, 0);
658 if (ret)
659 mlog_errno(ret);
660
661 return ret;
662 }
663
ocfs2_create(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,umode_t mode,bool excl)664 static int ocfs2_create(struct mnt_idmap *idmap,
665 struct inode *dir,
666 struct dentry *dentry,
667 umode_t mode,
668 bool excl)
669 {
670 int ret;
671
672 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
673 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
674 ret = ocfs2_mknod(&nop_mnt_idmap, dir, dentry, mode | S_IFREG, 0);
675 if (ret)
676 mlog_errno(ret);
677
678 return ret;
679 }
680
ocfs2_link(struct dentry * old_dentry,struct inode * dir,struct dentry * dentry)681 static int ocfs2_link(struct dentry *old_dentry,
682 struct inode *dir,
683 struct dentry *dentry)
684 {
685 handle_t *handle;
686 struct inode *inode = d_inode(old_dentry);
687 struct inode *old_dir = d_inode(old_dentry->d_parent);
688 int err;
689 struct buffer_head *fe_bh = NULL;
690 struct buffer_head *old_dir_bh = NULL;
691 struct buffer_head *parent_fe_bh = NULL;
692 struct ocfs2_dinode *fe = NULL;
693 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
694 struct ocfs2_dir_lookup_result lookup = { NULL, };
695 sigset_t oldset;
696 u64 old_de_ino;
697
698 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
699 old_dentry->d_name.len, old_dentry->d_name.name,
700 dentry->d_name.len, dentry->d_name.name);
701
702 if (S_ISDIR(inode->i_mode))
703 return -EPERM;
704
705 err = dquot_initialize(dir);
706 if (err) {
707 mlog_errno(err);
708 return err;
709 }
710
711 err = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
712 &parent_fe_bh, dir, 0);
713 if (err < 0) {
714 if (err != -ENOENT)
715 mlog_errno(err);
716 return err;
717 }
718
719 /* make sure both dirs have bhs
720 * get an extra ref on old_dir_bh if old==new */
721 if (!parent_fe_bh) {
722 if (old_dir_bh) {
723 parent_fe_bh = old_dir_bh;
724 get_bh(parent_fe_bh);
725 } else {
726 mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str);
727 err = -EIO;
728 goto out;
729 }
730 }
731
732 if (!dir->i_nlink) {
733 err = -ENOENT;
734 goto out;
735 }
736
737 err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
738 old_dentry->d_name.len, &old_de_ino);
739 if (err) {
740 err = -ENOENT;
741 goto out;
742 }
743
744 /*
745 * Check whether another node removed the source inode while we
746 * were in the vfs.
747 */
748 if (old_de_ino != OCFS2_I(inode)->ip_blkno) {
749 err = -ENOENT;
750 goto out;
751 }
752
753 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
754 dentry->d_name.len);
755 if (err)
756 goto out;
757
758 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
759 dentry->d_name.name,
760 dentry->d_name.len, &lookup);
761 if (err < 0) {
762 mlog_errno(err);
763 goto out;
764 }
765
766 err = ocfs2_inode_lock(inode, &fe_bh, 1);
767 if (err < 0) {
768 if (err != -ENOENT)
769 mlog_errno(err);
770 goto out;
771 }
772
773 fe = (struct ocfs2_dinode *) fe_bh->b_data;
774 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
775 err = -EMLINK;
776 goto out_unlock_inode;
777 }
778
779 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
780 if (IS_ERR(handle)) {
781 err = PTR_ERR(handle);
782 handle = NULL;
783 mlog_errno(err);
784 goto out_unlock_inode;
785 }
786
787 /* Starting to change things, restart is no longer possible. */
788 ocfs2_block_signals(&oldset);
789
790 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
791 OCFS2_JOURNAL_ACCESS_WRITE);
792 if (err < 0) {
793 mlog_errno(err);
794 goto out_commit;
795 }
796
797 inc_nlink(inode);
798 inode_set_ctime_current(inode);
799 ocfs2_set_links_count(fe, inode->i_nlink);
800 fe->i_ctime = cpu_to_le64(inode_get_ctime_sec(inode));
801 fe->i_ctime_nsec = cpu_to_le32(inode_get_ctime_nsec(inode));
802 ocfs2_update_inode_fsync_trans(handle, inode, 0);
803 ocfs2_journal_dirty(handle, fe_bh);
804
805 err = ocfs2_add_entry(handle, dentry, inode,
806 OCFS2_I(inode)->ip_blkno,
807 parent_fe_bh, &lookup);
808 if (err) {
809 ocfs2_add_links_count(fe, -1);
810 drop_nlink(inode);
811 mlog_errno(err);
812 goto out_commit;
813 }
814
815 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
816 if (err) {
817 mlog_errno(err);
818 goto out_commit;
819 }
820
821 ihold(inode);
822 d_instantiate(dentry, inode);
823
824 out_commit:
825 ocfs2_commit_trans(osb, handle);
826 ocfs2_unblock_signals(&oldset);
827 out_unlock_inode:
828 ocfs2_inode_unlock(inode, 1);
829
830 out:
831 ocfs2_double_unlock(old_dir, dir);
832
833 brelse(fe_bh);
834 brelse(parent_fe_bh);
835 brelse(old_dir_bh);
836
837 ocfs2_free_dir_lookup_result(&lookup);
838
839 if (err)
840 mlog_errno(err);
841
842 return err;
843 }
844
845 /*
846 * Takes and drops an exclusive lock on the given dentry. This will
847 * force other nodes to drop it.
848 */
ocfs2_remote_dentry_delete(struct dentry * dentry)849 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
850 {
851 int ret;
852
853 ret = ocfs2_dentry_lock(dentry, 1);
854 if (ret)
855 mlog_errno(ret);
856 else
857 ocfs2_dentry_unlock(dentry, 1);
858
859 return ret;
860 }
861
ocfs2_inode_is_unlinkable(struct inode * inode)862 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
863 {
864 if (S_ISDIR(inode->i_mode)) {
865 if (inode->i_nlink == 2)
866 return 1;
867 return 0;
868 }
869
870 if (inode->i_nlink == 1)
871 return 1;
872 return 0;
873 }
874
ocfs2_unlink(struct inode * dir,struct dentry * dentry)875 static int ocfs2_unlink(struct inode *dir,
876 struct dentry *dentry)
877 {
878 int status;
879 int child_locked = 0;
880 bool is_unlinkable = false;
881 struct inode *inode = d_inode(dentry);
882 struct inode *orphan_dir = NULL;
883 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
884 u64 blkno;
885 struct ocfs2_dinode *fe = NULL;
886 struct buffer_head *fe_bh = NULL;
887 struct buffer_head *parent_node_bh = NULL;
888 handle_t *handle = NULL;
889 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
890 struct ocfs2_dir_lookup_result lookup = { NULL, };
891 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
892
893 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
894 dentry->d_name.name,
895 (unsigned long long)OCFS2_I(dir)->ip_blkno,
896 (unsigned long long)OCFS2_I(inode)->ip_blkno);
897
898 status = dquot_initialize(dir);
899 if (status) {
900 mlog_errno(status);
901 return status;
902 }
903
904 BUG_ON(d_inode(dentry->d_parent) != dir);
905
906 if (inode == osb->root_inode)
907 return -EPERM;
908
909 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
910 OI_LS_PARENT);
911 if (status < 0) {
912 if (status != -ENOENT)
913 mlog_errno(status);
914 return status;
915 }
916
917 status = ocfs2_find_files_on_disk(dentry->d_name.name,
918 dentry->d_name.len, &blkno, dir,
919 &lookup);
920 if (status < 0) {
921 if (status != -ENOENT)
922 mlog_errno(status);
923 goto leave;
924 }
925
926 if (OCFS2_I(inode)->ip_blkno != blkno) {
927 status = -ENOENT;
928
929 trace_ocfs2_unlink_noent(
930 (unsigned long long)OCFS2_I(inode)->ip_blkno,
931 (unsigned long long)blkno,
932 OCFS2_I(inode)->ip_flags);
933 goto leave;
934 }
935
936 status = ocfs2_inode_lock(inode, &fe_bh, 1);
937 if (status < 0) {
938 if (status != -ENOENT)
939 mlog_errno(status);
940 goto leave;
941 }
942 child_locked = 1;
943
944 if (S_ISDIR(inode->i_mode)) {
945 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
946 status = -ENOTEMPTY;
947 goto leave;
948 }
949 }
950
951 status = ocfs2_remote_dentry_delete(dentry);
952 if (status < 0) {
953 /* This remote delete should succeed under all normal
954 * circumstances. */
955 mlog_errno(status);
956 goto leave;
957 }
958
959 if (ocfs2_inode_is_unlinkable(inode)) {
960 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
961 OCFS2_I(inode)->ip_blkno,
962 orphan_name, &orphan_insert,
963 false);
964 if (status < 0) {
965 mlog_errno(status);
966 goto leave;
967 }
968 is_unlinkable = true;
969 }
970
971 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
972 if (IS_ERR(handle)) {
973 status = PTR_ERR(handle);
974 handle = NULL;
975 mlog_errno(status);
976 goto leave;
977 }
978
979 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
980 OCFS2_JOURNAL_ACCESS_WRITE);
981 if (status < 0) {
982 mlog_errno(status);
983 goto leave;
984 }
985
986 fe = (struct ocfs2_dinode *) fe_bh->b_data;
987
988 /* delete the name from the parent dir */
989 status = ocfs2_delete_entry(handle, dir, &lookup);
990 if (status < 0) {
991 mlog_errno(status);
992 goto leave;
993 }
994
995 if (S_ISDIR(inode->i_mode))
996 drop_nlink(inode);
997 drop_nlink(inode);
998 ocfs2_set_links_count(fe, inode->i_nlink);
999 ocfs2_update_inode_fsync_trans(handle, inode, 0);
1000 ocfs2_journal_dirty(handle, fe_bh);
1001
1002 inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir));
1003 if (S_ISDIR(inode->i_mode))
1004 drop_nlink(dir);
1005
1006 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
1007 if (status < 0) {
1008 mlog_errno(status);
1009 if (S_ISDIR(inode->i_mode))
1010 inc_nlink(dir);
1011 goto leave;
1012 }
1013
1014 if (is_unlinkable) {
1015 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
1016 orphan_name, &orphan_insert, orphan_dir, false);
1017 if (status < 0)
1018 mlog_errno(status);
1019 }
1020
1021 leave:
1022 if (handle)
1023 ocfs2_commit_trans(osb, handle);
1024
1025 if (orphan_dir) {
1026 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1027 ocfs2_inode_unlock(orphan_dir, 1);
1028 inode_unlock(orphan_dir);
1029 iput(orphan_dir);
1030 }
1031
1032 if (child_locked)
1033 ocfs2_inode_unlock(inode, 1);
1034
1035 ocfs2_inode_unlock(dir, 1);
1036
1037 brelse(fe_bh);
1038 brelse(parent_node_bh);
1039
1040 ocfs2_free_dir_lookup_result(&orphan_insert);
1041 ocfs2_free_dir_lookup_result(&lookup);
1042
1043 if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
1044 mlog_errno(status);
1045
1046 return status;
1047 }
1048
ocfs2_check_if_ancestor(struct ocfs2_super * osb,u64 src_inode_no,u64 dest_inode_no)1049 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb,
1050 u64 src_inode_no, u64 dest_inode_no)
1051 {
1052 int ret = 0, i = 0;
1053 u64 parent_inode_no = 0;
1054 u64 child_inode_no = src_inode_no;
1055 struct inode *child_inode;
1056
1057 #define MAX_LOOKUP_TIMES 32
1058 while (1) {
1059 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0);
1060 if (IS_ERR(child_inode)) {
1061 ret = PTR_ERR(child_inode);
1062 break;
1063 }
1064
1065 ret = ocfs2_inode_lock(child_inode, NULL, 0);
1066 if (ret < 0) {
1067 iput(child_inode);
1068 if (ret != -ENOENT)
1069 mlog_errno(ret);
1070 break;
1071 }
1072
1073 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2,
1074 &parent_inode_no);
1075 ocfs2_inode_unlock(child_inode, 0);
1076 iput(child_inode);
1077 if (ret < 0) {
1078 ret = -ENOENT;
1079 break;
1080 }
1081
1082 if (parent_inode_no == dest_inode_no) {
1083 ret = 1;
1084 break;
1085 }
1086
1087 if (parent_inode_no == osb->root_inode->i_ino) {
1088 ret = 0;
1089 break;
1090 }
1091
1092 child_inode_no = parent_inode_no;
1093
1094 if (++i >= MAX_LOOKUP_TIMES) {
1095 mlog_ratelimited(ML_NOTICE, "max lookup times reached, "
1096 "filesystem may have nested directories, "
1097 "src inode: %llu, dest inode: %llu.\n",
1098 (unsigned long long)src_inode_no,
1099 (unsigned long long)dest_inode_no);
1100 ret = 0;
1101 break;
1102 }
1103 }
1104
1105 return ret;
1106 }
1107
1108 /*
1109 * The only place this should be used is rename and link!
1110 * if they have the same id, then the 1st one is the only one locked.
1111 */
ocfs2_double_lock(struct ocfs2_super * osb,struct buffer_head ** bh1,struct inode * inode1,struct buffer_head ** bh2,struct inode * inode2,int rename)1112 static int ocfs2_double_lock(struct ocfs2_super *osb,
1113 struct buffer_head **bh1,
1114 struct inode *inode1,
1115 struct buffer_head **bh2,
1116 struct inode *inode2,
1117 int rename)
1118 {
1119 int status;
1120 int inode1_is_ancestor, inode2_is_ancestor;
1121 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
1122 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
1123
1124 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
1125 (unsigned long long)oi2->ip_blkno);
1126
1127 if (*bh1)
1128 *bh1 = NULL;
1129 if (*bh2)
1130 *bh2 = NULL;
1131
1132 /* we always want to lock the one with the lower lockid first.
1133 * and if they are nested, we lock ancestor first */
1134 if (oi1->ip_blkno != oi2->ip_blkno) {
1135 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno,
1136 oi1->ip_blkno);
1137 if (inode1_is_ancestor < 0) {
1138 status = inode1_is_ancestor;
1139 goto bail;
1140 }
1141
1142 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno,
1143 oi2->ip_blkno);
1144 if (inode2_is_ancestor < 0) {
1145 status = inode2_is_ancestor;
1146 goto bail;
1147 }
1148
1149 if ((inode1_is_ancestor == 1) ||
1150 (oi1->ip_blkno < oi2->ip_blkno &&
1151 inode2_is_ancestor == 0)) {
1152 /* switch id1 and id2 around */
1153 swap(bh2, bh1);
1154 swap(inode2, inode1);
1155 }
1156 /* lock id2 */
1157 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1158 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT);
1159 if (status < 0) {
1160 if (status != -ENOENT)
1161 mlog_errno(status);
1162 goto bail;
1163 }
1164 }
1165
1166 /* lock id1 */
1167 status = ocfs2_inode_lock_nested(inode1, bh1, 1,
1168 rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT);
1169 if (status < 0) {
1170 /*
1171 * An error return must mean that no cluster locks
1172 * were held on function exit.
1173 */
1174 if (oi1->ip_blkno != oi2->ip_blkno) {
1175 ocfs2_inode_unlock(inode2, 1);
1176 brelse(*bh2);
1177 *bh2 = NULL;
1178 }
1179
1180 if (status != -ENOENT)
1181 mlog_errno(status);
1182 }
1183
1184 trace_ocfs2_double_lock_end(
1185 (unsigned long long)oi1->ip_blkno,
1186 (unsigned long long)oi2->ip_blkno);
1187
1188 bail:
1189 if (status)
1190 mlog_errno(status);
1191 return status;
1192 }
1193
ocfs2_double_unlock(struct inode * inode1,struct inode * inode2)1194 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1195 {
1196 ocfs2_inode_unlock(inode1, 1);
1197
1198 if (inode1 != inode2)
1199 ocfs2_inode_unlock(inode2, 1);
1200 }
1201
ocfs2_rename(struct mnt_idmap * idmap,struct inode * old_dir,struct dentry * old_dentry,struct inode * new_dir,struct dentry * new_dentry,unsigned int flags)1202 static int ocfs2_rename(struct mnt_idmap *idmap,
1203 struct inode *old_dir,
1204 struct dentry *old_dentry,
1205 struct inode *new_dir,
1206 struct dentry *new_dentry,
1207 unsigned int flags)
1208 {
1209 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1210 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1211 struct inode *old_inode = d_inode(old_dentry);
1212 struct inode *new_inode = d_inode(new_dentry);
1213 struct inode *orphan_dir = NULL;
1214 struct ocfs2_dinode *newfe = NULL;
1215 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1216 struct buffer_head *newfe_bh = NULL;
1217 struct buffer_head *old_inode_bh = NULL;
1218 struct ocfs2_super *osb = NULL;
1219 u64 newfe_blkno, old_de_ino;
1220 handle_t *handle = NULL;
1221 struct buffer_head *old_dir_bh = NULL;
1222 struct buffer_head *new_dir_bh = NULL;
1223 u32 old_dir_nlink = old_dir->i_nlink;
1224 struct ocfs2_dinode *old_di;
1225 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1226 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1227 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1228 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1229 struct ocfs2_dir_lookup_result target_insert = { NULL, };
1230 bool should_add_orphan = false;
1231
1232 if (flags)
1233 return -EINVAL;
1234
1235 /* At some point it might be nice to break this function up a
1236 * bit. */
1237
1238 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1239 old_dentry->d_name.len, old_dentry->d_name.name,
1240 new_dentry->d_name.len, new_dentry->d_name.name);
1241
1242 status = dquot_initialize(old_dir);
1243 if (status) {
1244 mlog_errno(status);
1245 goto bail;
1246 }
1247 status = dquot_initialize(new_dir);
1248 if (status) {
1249 mlog_errno(status);
1250 goto bail;
1251 }
1252
1253 osb = OCFS2_SB(old_dir->i_sb);
1254
1255 if (new_inode) {
1256 if (!igrab(new_inode))
1257 BUG();
1258 }
1259
1260 /* Assume a directory hierarchy thusly:
1261 * a/b/c
1262 * a/d
1263 * a,b,c, and d are all directories.
1264 *
1265 * from cwd of 'a' on both nodes:
1266 * node1: mv b/c d
1267 * node2: mv d b/c
1268 *
1269 * And that's why, just like the VFS, we need a file system
1270 * rename lock. */
1271 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1272 status = ocfs2_rename_lock(osb);
1273 if (status < 0) {
1274 mlog_errno(status);
1275 goto bail;
1276 }
1277 rename_lock = 1;
1278
1279 /* here we cannot guarantee the inodes haven't just been
1280 * changed, so check if they are nested again */
1281 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino,
1282 old_inode->i_ino);
1283 if (status < 0) {
1284 mlog_errno(status);
1285 goto bail;
1286 } else if (status == 1) {
1287 status = -EPERM;
1288 trace_ocfs2_rename_not_permitted(
1289 (unsigned long long)old_inode->i_ino,
1290 (unsigned long long)new_dir->i_ino);
1291 goto bail;
1292 }
1293 }
1294
1295 /* if old and new are the same, this'll just do one lock. */
1296 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1297 &new_dir_bh, new_dir, 1);
1298 if (status < 0) {
1299 mlog_errno(status);
1300 goto bail;
1301 }
1302 parents_locked = 1;
1303
1304 if (!new_dir->i_nlink) {
1305 status = -EACCES;
1306 goto bail;
1307 }
1308
1309 /* make sure both dirs have bhs
1310 * get an extra ref on old_dir_bh if old==new */
1311 if (!new_dir_bh) {
1312 if (old_dir_bh) {
1313 new_dir_bh = old_dir_bh;
1314 get_bh(new_dir_bh);
1315 } else {
1316 mlog(ML_ERROR, "no old_dir_bh!\n");
1317 status = -EIO;
1318 goto bail;
1319 }
1320 }
1321
1322 /*
1323 * Aside from allowing a meta data update, the locking here
1324 * also ensures that the downconvert thread on other nodes
1325 * won't have to concurrently downconvert the inode and the
1326 * dentry locks.
1327 */
1328 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1329 OI_LS_PARENT);
1330 if (status < 0) {
1331 if (status != -ENOENT)
1332 mlog_errno(status);
1333 goto bail;
1334 }
1335 old_child_locked = 1;
1336
1337 status = ocfs2_remote_dentry_delete(old_dentry);
1338 if (status < 0) {
1339 mlog_errno(status);
1340 goto bail;
1341 }
1342
1343 if (S_ISDIR(old_inode->i_mode)) {
1344 u64 old_inode_parent;
1345
1346 update_dot_dot = 1;
1347 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1348 old_inode,
1349 &old_inode_dot_dot_res);
1350 if (status) {
1351 status = -EIO;
1352 goto bail;
1353 }
1354
1355 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1356 status = -EIO;
1357 goto bail;
1358 }
1359
1360 if (!new_inode && new_dir != old_dir &&
1361 new_dir->i_nlink >= ocfs2_link_max(osb)) {
1362 status = -EMLINK;
1363 goto bail;
1364 }
1365 }
1366
1367 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1368 old_dentry->d_name.len,
1369 &old_de_ino);
1370 if (status) {
1371 status = -ENOENT;
1372 goto bail;
1373 }
1374
1375 /*
1376 * Check for inode number is _not_ due to possible IO errors.
1377 * We might rmdir the source, keep it as pwd of some process
1378 * and merrily kill the link to whatever was created under the
1379 * same name. Goodbye sticky bit ;-<
1380 */
1381 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1382 status = -ENOENT;
1383 goto bail;
1384 }
1385
1386 /* check if the target already exists (in which case we need
1387 * to delete it */
1388 status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1389 new_dentry->d_name.len,
1390 &newfe_blkno, new_dir,
1391 &target_lookup_res);
1392 /* The only error we allow here is -ENOENT because the new
1393 * file not existing is perfectly valid. */
1394 if ((status < 0) && (status != -ENOENT)) {
1395 /* If we cannot find the file specified we should just */
1396 /* return the error... */
1397 mlog_errno(status);
1398 goto bail;
1399 }
1400 if (status == 0)
1401 target_exists = 1;
1402
1403 if (!target_exists && new_inode) {
1404 /*
1405 * Target was unlinked by another node while we were
1406 * waiting to get to ocfs2_rename(). There isn't
1407 * anything we can do here to help the situation, so
1408 * bubble up the appropriate error.
1409 */
1410 status = -ENOENT;
1411 goto bail;
1412 }
1413
1414 /* In case we need to overwrite an existing file, we blow it
1415 * away first */
1416 if (target_exists) {
1417 /* VFS didn't think there existed an inode here, but
1418 * someone else in the cluster must have raced our
1419 * rename to create one. Today we error cleanly, in
1420 * the future we should consider calling iget to build
1421 * a new struct inode for this entry. */
1422 if (!new_inode) {
1423 status = -EACCES;
1424
1425 trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1426 new_dentry->d_name.name);
1427 goto bail;
1428 }
1429
1430 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1431 status = -EACCES;
1432
1433 trace_ocfs2_rename_disagree(
1434 (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1435 (unsigned long long)newfe_blkno,
1436 OCFS2_I(new_inode)->ip_flags);
1437 goto bail;
1438 }
1439
1440 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1441 if (status < 0) {
1442 if (status != -ENOENT)
1443 mlog_errno(status);
1444 goto bail;
1445 }
1446 new_child_locked = 1;
1447
1448 status = ocfs2_remote_dentry_delete(new_dentry);
1449 if (status < 0) {
1450 mlog_errno(status);
1451 goto bail;
1452 }
1453
1454 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1455
1456 trace_ocfs2_rename_over_existing(
1457 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1458 (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1459
1460 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1461 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1462 OCFS2_I(new_inode)->ip_blkno,
1463 orphan_name, &orphan_insert,
1464 false);
1465 if (status < 0) {
1466 mlog_errno(status);
1467 goto bail;
1468 }
1469 should_add_orphan = true;
1470 }
1471 } else {
1472 BUG_ON(d_inode(new_dentry->d_parent) != new_dir);
1473
1474 status = ocfs2_check_dir_for_entry(new_dir,
1475 new_dentry->d_name.name,
1476 new_dentry->d_name.len);
1477 if (status)
1478 goto bail;
1479
1480 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1481 new_dentry->d_name.name,
1482 new_dentry->d_name.len,
1483 &target_insert);
1484 if (status < 0) {
1485 mlog_errno(status);
1486 goto bail;
1487 }
1488 }
1489
1490 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1491 if (IS_ERR(handle)) {
1492 status = PTR_ERR(handle);
1493 handle = NULL;
1494 mlog_errno(status);
1495 goto bail;
1496 }
1497
1498 if (target_exists) {
1499 if (S_ISDIR(new_inode->i_mode)) {
1500 if (new_inode->i_nlink != 2 ||
1501 !ocfs2_empty_dir(new_inode)) {
1502 status = -ENOTEMPTY;
1503 goto bail;
1504 }
1505 }
1506 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1507 newfe_bh,
1508 OCFS2_JOURNAL_ACCESS_WRITE);
1509 if (status < 0) {
1510 mlog_errno(status);
1511 goto bail;
1512 }
1513
1514 /* change the dirent to point to the correct inode */
1515 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1516 old_inode);
1517 if (status < 0) {
1518 mlog_errno(status);
1519 goto bail;
1520 }
1521 inode_inc_iversion(new_dir);
1522
1523 if (S_ISDIR(new_inode->i_mode))
1524 ocfs2_set_links_count(newfe, 0);
1525 else
1526 ocfs2_add_links_count(newfe, -1);
1527 ocfs2_journal_dirty(handle, newfe_bh);
1528 if (should_add_orphan) {
1529 status = ocfs2_orphan_add(osb, handle, new_inode,
1530 newfe_bh, orphan_name,
1531 &orphan_insert, orphan_dir, false);
1532 if (status < 0) {
1533 mlog_errno(status);
1534 goto bail;
1535 }
1536 }
1537 } else {
1538 /* if the name was not found in new_dir, add it now */
1539 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1540 OCFS2_I(old_inode)->ip_blkno,
1541 new_dir_bh, &target_insert);
1542 if (status < 0) {
1543 mlog_errno(status);
1544 goto bail;
1545 }
1546 }
1547
1548 inode_set_ctime_current(old_inode);
1549 mark_inode_dirty(old_inode);
1550
1551 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1552 old_inode_bh,
1553 OCFS2_JOURNAL_ACCESS_WRITE);
1554 if (status >= 0) {
1555 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1556
1557 old_di->i_ctime = cpu_to_le64(inode_get_ctime_sec(old_inode));
1558 old_di->i_ctime_nsec = cpu_to_le32(inode_get_ctime_nsec(old_inode));
1559 ocfs2_journal_dirty(handle, old_inode_bh);
1560 } else
1561 mlog_errno(status);
1562
1563 /*
1564 * Now that the name has been added to new_dir, remove the old name.
1565 *
1566 * We don't keep any directory entry context around until now
1567 * because the insert might have changed the type of directory
1568 * we're dealing with.
1569 */
1570 status = ocfs2_find_entry(old_dentry->d_name.name,
1571 old_dentry->d_name.len, old_dir,
1572 &old_entry_lookup);
1573 if (status) {
1574 if (!is_journal_aborted(osb->journal->j_journal)) {
1575 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1576 "is not deleted.",
1577 new_dentry->d_name.len, new_dentry->d_name.name,
1578 old_dentry->d_name.len, old_dentry->d_name.name);
1579 }
1580 goto bail;
1581 }
1582
1583 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1584 if (status < 0) {
1585 mlog_errno(status);
1586 if (!is_journal_aborted(osb->journal->j_journal)) {
1587 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1588 "is not deleted.",
1589 new_dentry->d_name.len, new_dentry->d_name.name,
1590 old_dentry->d_name.len, old_dentry->d_name.name);
1591 }
1592 goto bail;
1593 }
1594
1595 if (new_inode) {
1596 drop_nlink(new_inode);
1597 inode_set_ctime_current(new_inode);
1598 }
1599 inode_set_mtime_to_ts(old_dir, inode_set_ctime_current(old_dir));
1600
1601 if (update_dot_dot) {
1602 status = ocfs2_update_entry(old_inode, handle,
1603 &old_inode_dot_dot_res, new_dir);
1604 drop_nlink(old_dir);
1605 if (new_inode) {
1606 drop_nlink(new_inode);
1607 } else {
1608 inc_nlink(new_dir);
1609 mark_inode_dirty(new_dir);
1610 }
1611 }
1612 mark_inode_dirty(old_dir);
1613 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1614 if (new_inode) {
1615 mark_inode_dirty(new_inode);
1616 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1617 }
1618
1619 if (old_dir != new_dir) {
1620 /* Keep the same times on both directories.*/
1621 inode_set_mtime_to_ts(new_dir,
1622 inode_set_ctime_to_ts(new_dir, inode_get_ctime(old_dir)));
1623
1624 /*
1625 * This will also pick up the i_nlink change from the
1626 * block above.
1627 */
1628 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1629 }
1630
1631 if (old_dir_nlink != old_dir->i_nlink) {
1632 if (!old_dir_bh) {
1633 mlog(ML_ERROR, "need to change nlink for old dir "
1634 "%llu from %d to %d but bh is NULL!\n",
1635 (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1636 (int)old_dir_nlink, old_dir->i_nlink);
1637 } else {
1638 struct ocfs2_dinode *fe;
1639 status = ocfs2_journal_access_di(handle,
1640 INODE_CACHE(old_dir),
1641 old_dir_bh,
1642 OCFS2_JOURNAL_ACCESS_WRITE);
1643 fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1644 ocfs2_set_links_count(fe, old_dir->i_nlink);
1645 ocfs2_journal_dirty(handle, old_dir_bh);
1646 }
1647 }
1648 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1649 status = 0;
1650 bail:
1651 if (handle)
1652 ocfs2_commit_trans(osb, handle);
1653
1654 if (orphan_dir) {
1655 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1656 ocfs2_inode_unlock(orphan_dir, 1);
1657 inode_unlock(orphan_dir);
1658 iput(orphan_dir);
1659 }
1660
1661 if (new_child_locked)
1662 ocfs2_inode_unlock(new_inode, 1);
1663
1664 if (old_child_locked)
1665 ocfs2_inode_unlock(old_inode, 1);
1666
1667 if (parents_locked)
1668 ocfs2_double_unlock(old_dir, new_dir);
1669
1670 if (rename_lock)
1671 ocfs2_rename_unlock(osb);
1672
1673 if (new_inode)
1674 sync_mapping_buffers(old_inode->i_mapping);
1675
1676 iput(new_inode);
1677
1678 ocfs2_free_dir_lookup_result(&target_lookup_res);
1679 ocfs2_free_dir_lookup_result(&old_entry_lookup);
1680 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1681 ocfs2_free_dir_lookup_result(&orphan_insert);
1682 ocfs2_free_dir_lookup_result(&target_insert);
1683
1684 brelse(newfe_bh);
1685 brelse(old_inode_bh);
1686 brelse(old_dir_bh);
1687 brelse(new_dir_bh);
1688
1689 if (status)
1690 mlog_errno(status);
1691
1692 return status;
1693 }
1694
1695 /*
1696 * we expect i_size = strlen(symname). Copy symname into the file
1697 * data, including the null terminator.
1698 */
ocfs2_create_symlink_data(struct ocfs2_super * osb,handle_t * handle,struct inode * inode,const char * symname)1699 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1700 handle_t *handle,
1701 struct inode *inode,
1702 const char *symname)
1703 {
1704 struct buffer_head **bhs = NULL;
1705 const char *c;
1706 struct super_block *sb = osb->sb;
1707 u64 p_blkno, p_blocks;
1708 int virtual, blocks, status, i, bytes_left;
1709
1710 bytes_left = i_size_read(inode) + 1;
1711 /* we can't trust i_blocks because we're actually going to
1712 * write i_size + 1 bytes. */
1713 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1714
1715 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1716 i_size_read(inode), blocks);
1717
1718 /* Sanity check -- make sure we're going to fit. */
1719 if (bytes_left >
1720 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1721 status = -EIO;
1722 mlog_errno(status);
1723 goto bail;
1724 }
1725
1726 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1727 if (!bhs) {
1728 status = -ENOMEM;
1729 mlog_errno(status);
1730 goto bail;
1731 }
1732
1733 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1734 NULL);
1735 if (status < 0) {
1736 mlog_errno(status);
1737 goto bail;
1738 }
1739
1740 /* links can never be larger than one cluster so we know this
1741 * is all going to be contiguous, but do a sanity check
1742 * anyway. */
1743 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1744 status = -EIO;
1745 mlog_errno(status);
1746 goto bail;
1747 }
1748
1749 virtual = 0;
1750 while(bytes_left > 0) {
1751 c = &symname[virtual * sb->s_blocksize];
1752
1753 bhs[virtual] = sb_getblk(sb, p_blkno);
1754 if (!bhs[virtual]) {
1755 status = -ENOMEM;
1756 mlog_errno(status);
1757 goto bail;
1758 }
1759 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1760 bhs[virtual]);
1761
1762 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1763 bhs[virtual],
1764 OCFS2_JOURNAL_ACCESS_CREATE);
1765 if (status < 0) {
1766 mlog_errno(status);
1767 goto bail;
1768 }
1769
1770 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1771
1772 memcpy(bhs[virtual]->b_data, c,
1773 (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1774 bytes_left);
1775
1776 ocfs2_journal_dirty(handle, bhs[virtual]);
1777
1778 virtual++;
1779 p_blkno++;
1780 bytes_left -= sb->s_blocksize;
1781 }
1782
1783 status = 0;
1784 bail:
1785
1786 if (bhs) {
1787 for(i = 0; i < blocks; i++)
1788 brelse(bhs[i]);
1789 kfree(bhs);
1790 }
1791
1792 if (status)
1793 mlog_errno(status);
1794 return status;
1795 }
1796
ocfs2_symlink(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,const char * symname)1797 static int ocfs2_symlink(struct mnt_idmap *idmap,
1798 struct inode *dir,
1799 struct dentry *dentry,
1800 const char *symname)
1801 {
1802 int status, l, credits;
1803 u64 newsize;
1804 struct ocfs2_super *osb = NULL;
1805 struct inode *inode = NULL;
1806 struct super_block *sb;
1807 struct buffer_head *new_fe_bh = NULL;
1808 struct buffer_head *parent_fe_bh = NULL;
1809 struct ocfs2_dinode *fe = NULL;
1810 struct ocfs2_dinode *dirfe;
1811 handle_t *handle = NULL;
1812 struct ocfs2_alloc_context *inode_ac = NULL;
1813 struct ocfs2_alloc_context *data_ac = NULL;
1814 struct ocfs2_alloc_context *xattr_ac = NULL;
1815 int want_clusters = 0;
1816 int xattr_credits = 0;
1817 struct ocfs2_security_xattr_info si = {
1818 .name = NULL,
1819 .enable = 1,
1820 };
1821 int did_quota = 0, did_quota_inode = 0;
1822 struct ocfs2_dir_lookup_result lookup = { NULL, };
1823 sigset_t oldset;
1824 int did_block_signals = 0;
1825 struct ocfs2_dentry_lock *dl = NULL;
1826
1827 trace_ocfs2_symlink_begin(dir, dentry, symname,
1828 dentry->d_name.len, dentry->d_name.name);
1829
1830 status = dquot_initialize(dir);
1831 if (status) {
1832 mlog_errno(status);
1833 goto bail;
1834 }
1835
1836 sb = dir->i_sb;
1837 osb = OCFS2_SB(sb);
1838
1839 l = strlen(symname) + 1;
1840
1841 credits = ocfs2_calc_symlink_credits(sb);
1842
1843 /* lock the parent directory */
1844 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1845 if (status < 0) {
1846 if (status != -ENOENT)
1847 mlog_errno(status);
1848 return status;
1849 }
1850
1851 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1852 if (!ocfs2_read_links_count(dirfe)) {
1853 /* can't make a file in a deleted directory. */
1854 status = -ENOENT;
1855 goto bail;
1856 }
1857
1858 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1859 dentry->d_name.len);
1860 if (status)
1861 goto bail;
1862
1863 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1864 dentry->d_name.name,
1865 dentry->d_name.len, &lookup);
1866 if (status < 0) {
1867 mlog_errno(status);
1868 goto bail;
1869 }
1870
1871 status = ocfs2_reserve_new_inode(osb, &inode_ac);
1872 if (status < 0) {
1873 if (status != -ENOSPC)
1874 mlog_errno(status);
1875 goto bail;
1876 }
1877
1878 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1879 if (IS_ERR(inode)) {
1880 status = PTR_ERR(inode);
1881 inode = NULL;
1882 mlog_errno(status);
1883 goto bail;
1884 }
1885
1886 /* get security xattr */
1887 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1888 if (status) {
1889 if (status == -EOPNOTSUPP)
1890 si.enable = 0;
1891 else {
1892 mlog_errno(status);
1893 goto bail;
1894 }
1895 }
1896
1897 /* calculate meta data/clusters for setting security xattr */
1898 if (si.enable) {
1899 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1900 &xattr_credits, &xattr_ac);
1901 if (status < 0) {
1902 mlog_errno(status);
1903 goto bail;
1904 }
1905 }
1906
1907 /* don't reserve bitmap space for fast symlinks. */
1908 if (l > ocfs2_fast_symlink_chars(sb))
1909 want_clusters += 1;
1910
1911 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1912 if (status < 0) {
1913 if (status != -ENOSPC)
1914 mlog_errno(status);
1915 goto bail;
1916 }
1917
1918 handle = ocfs2_start_trans(osb, credits + xattr_credits);
1919 if (IS_ERR(handle)) {
1920 status = PTR_ERR(handle);
1921 handle = NULL;
1922 mlog_errno(status);
1923 goto bail;
1924 }
1925
1926 /* Starting to change things, restart is no longer possible. */
1927 ocfs2_block_signals(&oldset);
1928 did_block_signals = 1;
1929
1930 status = dquot_alloc_inode(inode);
1931 if (status)
1932 goto bail;
1933 did_quota_inode = 1;
1934
1935 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1936 dentry->d_name.name,
1937 (unsigned long long)OCFS2_I(dir)->ip_blkno,
1938 inode->i_mode);
1939
1940 status = ocfs2_mknod_locked(osb, dir, inode,
1941 0, &new_fe_bh, parent_fe_bh, handle,
1942 inode_ac);
1943 if (status < 0) {
1944 mlog_errno(status);
1945 goto bail;
1946 }
1947
1948 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1949 inode->i_rdev = 0;
1950 newsize = l - 1;
1951 inode->i_op = &ocfs2_symlink_inode_operations;
1952 inode_nohighmem(inode);
1953 if (l > ocfs2_fast_symlink_chars(sb)) {
1954 u32 offset = 0;
1955
1956 status = dquot_alloc_space_nodirty(inode,
1957 ocfs2_clusters_to_bytes(osb->sb, 1));
1958 if (status)
1959 goto bail;
1960 did_quota = 1;
1961 inode->i_mapping->a_ops = &ocfs2_aops;
1962 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1963 new_fe_bh,
1964 handle, data_ac, NULL,
1965 NULL);
1966 if (status < 0) {
1967 if (status != -ENOSPC && status != -EINTR) {
1968 mlog(ML_ERROR,
1969 "Failed to extend file to %llu\n",
1970 (unsigned long long)newsize);
1971 mlog_errno(status);
1972 status = -ENOSPC;
1973 }
1974 goto bail;
1975 }
1976 i_size_write(inode, newsize);
1977 inode->i_blocks = ocfs2_inode_sector_count(inode);
1978 } else {
1979 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1980 memcpy((char *) fe->id2.i_symlink, symname, l);
1981 i_size_write(inode, newsize);
1982 inode->i_blocks = 0;
1983 }
1984
1985 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1986 if (status < 0) {
1987 mlog_errno(status);
1988 goto bail;
1989 }
1990
1991 if (!ocfs2_inode_is_fast_symlink(inode)) {
1992 status = ocfs2_create_symlink_data(osb, handle, inode,
1993 symname);
1994 if (status < 0) {
1995 mlog_errno(status);
1996 goto bail;
1997 }
1998 }
1999
2000 if (si.enable) {
2001 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
2002 xattr_ac, data_ac);
2003 if (status < 0) {
2004 mlog_errno(status);
2005 goto bail;
2006 }
2007 }
2008
2009 /*
2010 * Do this before adding the entry to the directory. We add
2011 * also set d_op after success so that ->d_iput() will cleanup
2012 * the dentry lock even if ocfs2_add_entry() fails below.
2013 */
2014 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
2015 if (status) {
2016 mlog_errno(status);
2017 goto bail;
2018 }
2019
2020 dl = dentry->d_fsdata;
2021
2022 status = ocfs2_add_entry(handle, dentry, inode,
2023 le64_to_cpu(fe->i_blkno), parent_fe_bh,
2024 &lookup);
2025 if (status < 0) {
2026 mlog_errno(status);
2027 goto bail;
2028 }
2029
2030 insert_inode_hash(inode);
2031 d_instantiate(dentry, inode);
2032 bail:
2033 if (status < 0 && did_quota)
2034 dquot_free_space_nodirty(inode,
2035 ocfs2_clusters_to_bytes(osb->sb, 1));
2036 if (status < 0 && did_quota_inode)
2037 dquot_free_inode(inode);
2038 if (handle) {
2039 if (status < 0 && fe)
2040 ocfs2_set_links_count(fe, 0);
2041 ocfs2_commit_trans(osb, handle);
2042 }
2043
2044 ocfs2_inode_unlock(dir, 1);
2045 if (did_block_signals)
2046 ocfs2_unblock_signals(&oldset);
2047
2048 brelse(new_fe_bh);
2049 brelse(parent_fe_bh);
2050 kfree(si.value);
2051 ocfs2_free_dir_lookup_result(&lookup);
2052 if (inode_ac)
2053 ocfs2_free_alloc_context(inode_ac);
2054 if (data_ac)
2055 ocfs2_free_alloc_context(data_ac);
2056 if (xattr_ac)
2057 ocfs2_free_alloc_context(xattr_ac);
2058 if ((status < 0) && inode) {
2059 if (dl)
2060 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2061
2062 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
2063 clear_nlink(inode);
2064 iput(inode);
2065 }
2066
2067 if (status)
2068 mlog_errno(status);
2069
2070 return status;
2071 }
2072
ocfs2_blkno_stringify(u64 blkno,char * name)2073 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2074 {
2075 int status, namelen;
2076
2077 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2078 (long long)blkno);
2079 if (namelen <= 0) {
2080 if (namelen)
2081 status = namelen;
2082 else
2083 status = -EINVAL;
2084 mlog_errno(status);
2085 goto bail;
2086 }
2087 if (namelen != OCFS2_ORPHAN_NAMELEN) {
2088 status = -EINVAL;
2089 mlog_errno(status);
2090 goto bail;
2091 }
2092
2093 trace_ocfs2_blkno_stringify(blkno, name, namelen);
2094
2095 status = 0;
2096 bail:
2097 if (status < 0)
2098 mlog_errno(status);
2099 return status;
2100 }
2101
ocfs2_lookup_lock_orphan_dir(struct ocfs2_super * osb,struct inode ** ret_orphan_dir,struct buffer_head ** ret_orphan_dir_bh)2102 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2103 struct inode **ret_orphan_dir,
2104 struct buffer_head **ret_orphan_dir_bh)
2105 {
2106 struct inode *orphan_dir_inode;
2107 struct buffer_head *orphan_dir_bh = NULL;
2108 int ret = 0;
2109
2110 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2111 ORPHAN_DIR_SYSTEM_INODE,
2112 osb->slot_num);
2113 if (!orphan_dir_inode) {
2114 ret = -ENOENT;
2115 mlog_errno(ret);
2116 return ret;
2117 }
2118
2119 inode_lock(orphan_dir_inode);
2120
2121 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2122 if (ret < 0) {
2123 inode_unlock(orphan_dir_inode);
2124 iput(orphan_dir_inode);
2125
2126 mlog_errno(ret);
2127 return ret;
2128 }
2129
2130 *ret_orphan_dir = orphan_dir_inode;
2131 *ret_orphan_dir_bh = orphan_dir_bh;
2132
2133 return 0;
2134 }
2135
__ocfs2_prepare_orphan_dir(struct inode * orphan_dir_inode,struct buffer_head * orphan_dir_bh,u64 blkno,char * name,struct ocfs2_dir_lookup_result * lookup,bool dio)2136 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2137 struct buffer_head *orphan_dir_bh,
2138 u64 blkno,
2139 char *name,
2140 struct ocfs2_dir_lookup_result *lookup,
2141 bool dio)
2142 {
2143 int ret;
2144 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2145 int namelen = dio ?
2146 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2147 OCFS2_ORPHAN_NAMELEN;
2148
2149 if (dio) {
2150 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2151 OCFS2_DIO_ORPHAN_PREFIX);
2152 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2153 ret = -EINVAL;
2154 mlog_errno(ret);
2155 return ret;
2156 }
2157
2158 ret = ocfs2_blkno_stringify(blkno,
2159 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2160 } else
2161 ret = ocfs2_blkno_stringify(blkno, name);
2162 if (ret < 0) {
2163 mlog_errno(ret);
2164 return ret;
2165 }
2166
2167 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2168 orphan_dir_bh, name,
2169 namelen, lookup);
2170 if (ret < 0) {
2171 mlog_errno(ret);
2172 return ret;
2173 }
2174
2175 return 0;
2176 }
2177
2178 /**
2179 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2180 * insertion of an orphan.
2181 * @osb: ocfs2 file system
2182 * @ret_orphan_dir: Orphan dir inode - returned locked!
2183 * @blkno: Actual block number of the inode to be inserted into orphan dir.
2184 * @lookup: dir lookup result, to be passed back into functions like
2185 * ocfs2_orphan_add
2186 *
2187 * Returns zero on success and the ret_orphan_dir, name and lookup
2188 * fields will be populated.
2189 *
2190 * Returns non-zero on failure.
2191 */
ocfs2_prepare_orphan_dir(struct ocfs2_super * osb,struct inode ** ret_orphan_dir,u64 blkno,char * name,struct ocfs2_dir_lookup_result * lookup,bool dio)2192 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2193 struct inode **ret_orphan_dir,
2194 u64 blkno,
2195 char *name,
2196 struct ocfs2_dir_lookup_result *lookup,
2197 bool dio)
2198 {
2199 struct inode *orphan_dir_inode = NULL;
2200 struct buffer_head *orphan_dir_bh = NULL;
2201 int ret = 0;
2202
2203 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2204 &orphan_dir_bh);
2205 if (ret < 0) {
2206 mlog_errno(ret);
2207 return ret;
2208 }
2209
2210 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2211 blkno, name, lookup, dio);
2212 if (ret < 0) {
2213 mlog_errno(ret);
2214 goto out;
2215 }
2216
2217 *ret_orphan_dir = orphan_dir_inode;
2218
2219 out:
2220 brelse(orphan_dir_bh);
2221
2222 if (ret) {
2223 ocfs2_inode_unlock(orphan_dir_inode, 1);
2224 inode_unlock(orphan_dir_inode);
2225 iput(orphan_dir_inode);
2226 }
2227
2228 if (ret)
2229 mlog_errno(ret);
2230 return ret;
2231 }
2232
ocfs2_orphan_add(struct ocfs2_super * osb,handle_t * handle,struct inode * inode,struct buffer_head * fe_bh,char * name,struct ocfs2_dir_lookup_result * lookup,struct inode * orphan_dir_inode,bool dio)2233 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2234 handle_t *handle,
2235 struct inode *inode,
2236 struct buffer_head *fe_bh,
2237 char *name,
2238 struct ocfs2_dir_lookup_result *lookup,
2239 struct inode *orphan_dir_inode,
2240 bool dio)
2241 {
2242 struct buffer_head *orphan_dir_bh = NULL;
2243 int status = 0;
2244 struct ocfs2_dinode *orphan_fe;
2245 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2246 int namelen = dio ?
2247 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2248 OCFS2_ORPHAN_NAMELEN;
2249
2250 trace_ocfs2_orphan_add_begin(
2251 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2252
2253 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2254 if (status < 0) {
2255 mlog_errno(status);
2256 goto leave;
2257 }
2258
2259 status = ocfs2_journal_access_di(handle,
2260 INODE_CACHE(orphan_dir_inode),
2261 orphan_dir_bh,
2262 OCFS2_JOURNAL_ACCESS_WRITE);
2263 if (status < 0) {
2264 mlog_errno(status);
2265 goto leave;
2266 }
2267
2268 /*
2269 * We're going to journal the change of i_flags and i_orphaned_slot.
2270 * It's safe anyway, though some callers may duplicate the journaling.
2271 * Journaling within the func just make the logic look more
2272 * straightforward.
2273 */
2274 status = ocfs2_journal_access_di(handle,
2275 INODE_CACHE(inode),
2276 fe_bh,
2277 OCFS2_JOURNAL_ACCESS_WRITE);
2278 if (status < 0) {
2279 mlog_errno(status);
2280 goto leave;
2281 }
2282
2283 /* we're a cluster, and nlink can change on disk from
2284 * underneath us... */
2285 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2286 if (S_ISDIR(inode->i_mode))
2287 ocfs2_add_links_count(orphan_fe, 1);
2288 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2289 ocfs2_journal_dirty(handle, orphan_dir_bh);
2290
2291 status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2292 namelen, inode,
2293 OCFS2_I(inode)->ip_blkno,
2294 orphan_dir_bh, lookup);
2295 if (status < 0) {
2296 mlog_errno(status);
2297 goto rollback;
2298 }
2299
2300 if (dio) {
2301 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan
2302 * slot.
2303 */
2304 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2305 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num);
2306 } else {
2307 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2308 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2309
2310 /* Record which orphan dir our inode now resides
2311 * in. delete_inode will use this to determine which orphan
2312 * dir to lock. */
2313 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2314 }
2315
2316 ocfs2_journal_dirty(handle, fe_bh);
2317
2318 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2319 osb->slot_num);
2320
2321 rollback:
2322 if (status < 0) {
2323 if (S_ISDIR(inode->i_mode))
2324 ocfs2_add_links_count(orphan_fe, -1);
2325 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2326 }
2327
2328 leave:
2329 brelse(orphan_dir_bh);
2330
2331 return status;
2332 }
2333
2334 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
ocfs2_orphan_del(struct ocfs2_super * osb,handle_t * handle,struct inode * orphan_dir_inode,struct inode * inode,struct buffer_head * orphan_dir_bh,bool dio)2335 int ocfs2_orphan_del(struct ocfs2_super *osb,
2336 handle_t *handle,
2337 struct inode *orphan_dir_inode,
2338 struct inode *inode,
2339 struct buffer_head *orphan_dir_bh,
2340 bool dio)
2341 {
2342 char name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2343 struct ocfs2_dinode *orphan_fe;
2344 int status = 0;
2345 struct ocfs2_dir_lookup_result lookup = { NULL, };
2346
2347 if (dio) {
2348 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2349 OCFS2_DIO_ORPHAN_PREFIX);
2350 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2351 status = -EINVAL;
2352 mlog_errno(status);
2353 return status;
2354 }
2355
2356 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno,
2357 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2358 } else
2359 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2360 if (status < 0) {
2361 mlog_errno(status);
2362 goto leave;
2363 }
2364
2365 trace_ocfs2_orphan_del(
2366 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2367 name, strlen(name));
2368
2369 status = ocfs2_journal_access_di(handle,
2370 INODE_CACHE(orphan_dir_inode),
2371 orphan_dir_bh,
2372 OCFS2_JOURNAL_ACCESS_WRITE);
2373 if (status < 0) {
2374 mlog_errno(status);
2375 goto leave;
2376 }
2377
2378 /* find it's spot in the orphan directory */
2379 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode,
2380 &lookup);
2381 if (status) {
2382 mlog_errno(status);
2383 goto leave;
2384 }
2385
2386 /* remove it from the orphan directory */
2387 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2388 if (status < 0) {
2389 mlog_errno(status);
2390 goto leave;
2391 }
2392
2393 /* do the i_nlink dance! :) */
2394 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2395 if (S_ISDIR(inode->i_mode))
2396 ocfs2_add_links_count(orphan_fe, -1);
2397 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2398 ocfs2_journal_dirty(handle, orphan_dir_bh);
2399
2400 leave:
2401 ocfs2_free_dir_lookup_result(&lookup);
2402
2403 if (status)
2404 mlog_errno(status);
2405 return status;
2406 }
2407
2408 /**
2409 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2410 * allocated file. This is different from the typical 'add to orphan dir'
2411 * operation in that the inode does not yet exist. This is a problem because
2412 * the orphan dir stringifies the inode block number to come up with it's
2413 * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2414 * problem. This function works around it by calling deeper into the orphan
2415 * and suballoc code than other callers. Use this only by necessity.
2416 * @dir: The directory which this inode will ultimately wind up under - not the
2417 * orphan dir!
2418 * @dir_bh: buffer_head the @dir inode block
2419 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2420 * with the string to be used for orphan dirent. Pass back to the orphan dir
2421 * code.
2422 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2423 * dir code.
2424 * @ret_di_blkno: block number where the new inode will be allocated.
2425 * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2426 * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2427 *
2428 * Returns zero on success and the ret_orphan_dir, name and lookup
2429 * fields will be populated.
2430 *
2431 * Returns non-zero on failure.
2432 */
ocfs2_prep_new_orphaned_file(struct inode * dir,struct buffer_head * dir_bh,char * orphan_name,struct inode ** ret_orphan_dir,u64 * ret_di_blkno,struct ocfs2_dir_lookup_result * orphan_insert,struct ocfs2_alloc_context ** ret_inode_ac)2433 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2434 struct buffer_head *dir_bh,
2435 char *orphan_name,
2436 struct inode **ret_orphan_dir,
2437 u64 *ret_di_blkno,
2438 struct ocfs2_dir_lookup_result *orphan_insert,
2439 struct ocfs2_alloc_context **ret_inode_ac)
2440 {
2441 int ret;
2442 u64 di_blkno;
2443 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2444 struct inode *orphan_dir = NULL;
2445 struct buffer_head *orphan_dir_bh = NULL;
2446 struct ocfs2_alloc_context *inode_ac = NULL;
2447
2448 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2449 if (ret < 0) {
2450 mlog_errno(ret);
2451 return ret;
2452 }
2453
2454 /* reserve an inode spot */
2455 ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2456 if (ret < 0) {
2457 if (ret != -ENOSPC)
2458 mlog_errno(ret);
2459 goto out;
2460 }
2461
2462 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2463 &di_blkno);
2464 if (ret) {
2465 mlog_errno(ret);
2466 goto out;
2467 }
2468
2469 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2470 di_blkno, orphan_name, orphan_insert,
2471 false);
2472 if (ret < 0) {
2473 mlog_errno(ret);
2474 goto out;
2475 }
2476
2477 out:
2478 if (ret == 0) {
2479 *ret_orphan_dir = orphan_dir;
2480 *ret_di_blkno = di_blkno;
2481 *ret_inode_ac = inode_ac;
2482 /*
2483 * orphan_name and orphan_insert are already up to
2484 * date via prepare_orphan_dir
2485 */
2486 } else {
2487 /* Unroll reserve_new_inode* */
2488 if (inode_ac)
2489 ocfs2_free_alloc_context(inode_ac);
2490
2491 /* Unroll orphan dir locking */
2492 inode_unlock(orphan_dir);
2493 ocfs2_inode_unlock(orphan_dir, 1);
2494 iput(orphan_dir);
2495 }
2496
2497 brelse(orphan_dir_bh);
2498
2499 return ret;
2500 }
2501
ocfs2_create_inode_in_orphan(struct inode * dir,int mode,struct inode ** new_inode)2502 int ocfs2_create_inode_in_orphan(struct inode *dir,
2503 int mode,
2504 struct inode **new_inode)
2505 {
2506 int status, did_quota_inode = 0;
2507 struct inode *inode = NULL;
2508 struct inode *orphan_dir = NULL;
2509 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2510 handle_t *handle = NULL;
2511 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2512 struct buffer_head *parent_di_bh = NULL;
2513 struct buffer_head *new_di_bh = NULL;
2514 struct ocfs2_alloc_context *inode_ac = NULL;
2515 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2516 u64 di_blkno, suballoc_loc;
2517 u16 suballoc_bit;
2518
2519 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2520 if (status < 0) {
2521 if (status != -ENOENT)
2522 mlog_errno(status);
2523 return status;
2524 }
2525
2526 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2527 orphan_name, &orphan_dir,
2528 &di_blkno, &orphan_insert, &inode_ac);
2529 if (status < 0) {
2530 if (status != -ENOSPC)
2531 mlog_errno(status);
2532 goto leave;
2533 }
2534
2535 inode = ocfs2_get_init_inode(dir, mode);
2536 if (IS_ERR(inode)) {
2537 status = PTR_ERR(inode);
2538 inode = NULL;
2539 mlog_errno(status);
2540 goto leave;
2541 }
2542
2543 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2544 if (IS_ERR(handle)) {
2545 status = PTR_ERR(handle);
2546 handle = NULL;
2547 mlog_errno(status);
2548 goto leave;
2549 }
2550
2551 status = dquot_alloc_inode(inode);
2552 if (status)
2553 goto leave;
2554 did_quota_inode = 1;
2555
2556 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2557 &suballoc_loc,
2558 &suballoc_bit, di_blkno);
2559 if (status < 0) {
2560 mlog_errno(status);
2561 goto leave;
2562 }
2563
2564 clear_nlink(inode);
2565 /* do the real work now. */
2566 status = __ocfs2_mknod_locked(dir, inode,
2567 0, &new_di_bh, parent_di_bh, handle,
2568 inode_ac, di_blkno, suballoc_loc,
2569 suballoc_bit);
2570 if (status < 0) {
2571 mlog_errno(status);
2572 goto leave;
2573 }
2574
2575 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2576 &orphan_insert, orphan_dir, false);
2577 if (status < 0) {
2578 mlog_errno(status);
2579 goto leave;
2580 }
2581
2582 /* get open lock so that only nodes can't remove it from orphan dir. */
2583 status = ocfs2_open_lock(inode);
2584 if (status < 0)
2585 mlog_errno(status);
2586
2587 insert_inode_hash(inode);
2588 leave:
2589 if (status < 0 && did_quota_inode)
2590 dquot_free_inode(inode);
2591 if (handle)
2592 ocfs2_commit_trans(osb, handle);
2593
2594 if (orphan_dir) {
2595 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2596 ocfs2_inode_unlock(orphan_dir, 1);
2597 inode_unlock(orphan_dir);
2598 iput(orphan_dir);
2599 }
2600
2601 if ((status < 0) && inode) {
2602 clear_nlink(inode);
2603 iput(inode);
2604 }
2605
2606 if (inode_ac)
2607 ocfs2_free_alloc_context(inode_ac);
2608
2609 brelse(new_di_bh);
2610
2611 if (!status)
2612 *new_inode = inode;
2613
2614 ocfs2_free_dir_lookup_result(&orphan_insert);
2615
2616 ocfs2_inode_unlock(dir, 1);
2617 brelse(parent_di_bh);
2618 return status;
2619 }
2620
ocfs2_add_inode_to_orphan(struct ocfs2_super * osb,struct inode * inode)2621 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
2622 struct inode *inode)
2623 {
2624 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2625 struct inode *orphan_dir_inode = NULL;
2626 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2627 struct buffer_head *di_bh = NULL;
2628 int status = 0;
2629 handle_t *handle = NULL;
2630 struct ocfs2_dinode *di = NULL;
2631
2632 status = ocfs2_inode_lock(inode, &di_bh, 1);
2633 if (status < 0) {
2634 mlog_errno(status);
2635 goto bail;
2636 }
2637
2638 di = (struct ocfs2_dinode *) di_bh->b_data;
2639 /*
2640 * Another append dio crashed?
2641 * If so, manually recover it first.
2642 */
2643 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
2644 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode));
2645 if (status < 0) {
2646 if (status != -ENOSPC)
2647 mlog_errno(status);
2648 goto bail_unlock_inode;
2649 }
2650
2651 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0);
2652 if (status < 0) {
2653 mlog_errno(status);
2654 goto bail_unlock_inode;
2655 }
2656 }
2657
2658 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
2659 OCFS2_I(inode)->ip_blkno,
2660 orphan_name,
2661 &orphan_insert,
2662 true);
2663 if (status < 0) {
2664 mlog_errno(status);
2665 goto bail_unlock_inode;
2666 }
2667
2668 handle = ocfs2_start_trans(osb,
2669 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS);
2670 if (IS_ERR(handle)) {
2671 status = PTR_ERR(handle);
2672 goto bail_unlock_orphan;
2673 }
2674
2675 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
2676 &orphan_insert, orphan_dir_inode, true);
2677 if (status)
2678 mlog_errno(status);
2679
2680 ocfs2_commit_trans(osb, handle);
2681
2682 bail_unlock_orphan:
2683 ocfs2_inode_unlock(orphan_dir_inode, 1);
2684 inode_unlock(orphan_dir_inode);
2685 iput(orphan_dir_inode);
2686
2687 ocfs2_free_dir_lookup_result(&orphan_insert);
2688
2689 bail_unlock_inode:
2690 ocfs2_inode_unlock(inode, 1);
2691 brelse(di_bh);
2692
2693 bail:
2694 return status;
2695 }
2696
ocfs2_del_inode_from_orphan(struct ocfs2_super * osb,struct inode * inode,struct buffer_head * di_bh,int update_isize,loff_t end)2697 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
2698 struct inode *inode, struct buffer_head *di_bh,
2699 int update_isize, loff_t end)
2700 {
2701 struct inode *orphan_dir_inode = NULL;
2702 struct buffer_head *orphan_dir_bh = NULL;
2703 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2704 handle_t *handle = NULL;
2705 int status = 0;
2706
2707 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2708 ORPHAN_DIR_SYSTEM_INODE,
2709 le16_to_cpu(di->i_dio_orphaned_slot));
2710 if (!orphan_dir_inode) {
2711 status = -ENOENT;
2712 mlog_errno(status);
2713 goto bail;
2714 }
2715
2716 inode_lock(orphan_dir_inode);
2717 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2718 if (status < 0) {
2719 inode_unlock(orphan_dir_inode);
2720 iput(orphan_dir_inode);
2721 mlog_errno(status);
2722 goto bail;
2723 }
2724
2725 handle = ocfs2_start_trans(osb,
2726 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS);
2727 if (IS_ERR(handle)) {
2728 status = PTR_ERR(handle);
2729 goto bail_unlock_orphan;
2730 }
2731
2732 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)));
2733
2734 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
2735 inode, orphan_dir_bh, true);
2736 if (status < 0) {
2737 mlog_errno(status);
2738 goto bail_commit;
2739 }
2740
2741 status = ocfs2_journal_access_di(handle,
2742 INODE_CACHE(inode),
2743 di_bh,
2744 OCFS2_JOURNAL_ACCESS_WRITE);
2745 if (status < 0) {
2746 mlog_errno(status);
2747 goto bail_commit;
2748 }
2749
2750 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2751 di->i_dio_orphaned_slot = 0;
2752
2753 if (update_isize) {
2754 status = ocfs2_set_inode_size(handle, inode, di_bh, end);
2755 if (status)
2756 mlog_errno(status);
2757 } else
2758 ocfs2_journal_dirty(handle, di_bh);
2759
2760 bail_commit:
2761 ocfs2_commit_trans(osb, handle);
2762
2763 bail_unlock_orphan:
2764 ocfs2_inode_unlock(orphan_dir_inode, 1);
2765 inode_unlock(orphan_dir_inode);
2766 brelse(orphan_dir_bh);
2767 iput(orphan_dir_inode);
2768
2769 bail:
2770 return status;
2771 }
2772
ocfs2_mv_orphaned_inode_to_new(struct inode * dir,struct inode * inode,struct dentry * dentry)2773 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2774 struct inode *inode,
2775 struct dentry *dentry)
2776 {
2777 int status = 0;
2778 struct buffer_head *parent_di_bh = NULL;
2779 handle_t *handle = NULL;
2780 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2781 struct ocfs2_dinode *dir_di, *di;
2782 struct inode *orphan_dir_inode = NULL;
2783 struct buffer_head *orphan_dir_bh = NULL;
2784 struct buffer_head *di_bh = NULL;
2785 struct ocfs2_dir_lookup_result lookup = { NULL, };
2786
2787 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2788 dentry->d_name.len, dentry->d_name.name,
2789 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2790 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2791
2792 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2793 if (status < 0) {
2794 if (status != -ENOENT)
2795 mlog_errno(status);
2796 return status;
2797 }
2798
2799 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2800 if (!dir_di->i_links_count) {
2801 /* can't make a file in a deleted directory. */
2802 status = -ENOENT;
2803 goto leave;
2804 }
2805
2806 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2807 dentry->d_name.len);
2808 if (status)
2809 goto leave;
2810
2811 /* get a spot inside the dir. */
2812 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2813 dentry->d_name.name,
2814 dentry->d_name.len, &lookup);
2815 if (status < 0) {
2816 mlog_errno(status);
2817 goto leave;
2818 }
2819
2820 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2821 ORPHAN_DIR_SYSTEM_INODE,
2822 osb->slot_num);
2823 if (!orphan_dir_inode) {
2824 status = -ENOENT;
2825 mlog_errno(status);
2826 goto leave;
2827 }
2828
2829 inode_lock(orphan_dir_inode);
2830
2831 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2832 if (status < 0) {
2833 mlog_errno(status);
2834 inode_unlock(orphan_dir_inode);
2835 iput(orphan_dir_inode);
2836 goto leave;
2837 }
2838
2839 status = ocfs2_read_inode_block(inode, &di_bh);
2840 if (status < 0) {
2841 mlog_errno(status);
2842 goto orphan_unlock;
2843 }
2844
2845 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2846 if (IS_ERR(handle)) {
2847 status = PTR_ERR(handle);
2848 handle = NULL;
2849 mlog_errno(status);
2850 goto orphan_unlock;
2851 }
2852
2853 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2854 di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2855 if (status < 0) {
2856 mlog_errno(status);
2857 goto out_commit;
2858 }
2859
2860 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2861 orphan_dir_bh, false);
2862 if (status < 0) {
2863 mlog_errno(status);
2864 goto out_commit;
2865 }
2866
2867 di = (struct ocfs2_dinode *)di_bh->b_data;
2868 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2869 di->i_orphaned_slot = 0;
2870 set_nlink(inode, 1);
2871 ocfs2_set_links_count(di, inode->i_nlink);
2872 ocfs2_update_inode_fsync_trans(handle, inode, 1);
2873 ocfs2_journal_dirty(handle, di_bh);
2874
2875 status = ocfs2_add_entry(handle, dentry, inode,
2876 OCFS2_I(inode)->ip_blkno, parent_di_bh,
2877 &lookup);
2878 if (status < 0) {
2879 mlog_errno(status);
2880 goto out_commit;
2881 }
2882
2883 status = ocfs2_dentry_attach_lock(dentry, inode,
2884 OCFS2_I(dir)->ip_blkno);
2885 if (status) {
2886 mlog_errno(status);
2887 goto out_commit;
2888 }
2889
2890 d_instantiate(dentry, inode);
2891 status = 0;
2892 out_commit:
2893 ocfs2_commit_trans(osb, handle);
2894 orphan_unlock:
2895 ocfs2_inode_unlock(orphan_dir_inode, 1);
2896 inode_unlock(orphan_dir_inode);
2897 iput(orphan_dir_inode);
2898 leave:
2899
2900 ocfs2_inode_unlock(dir, 1);
2901
2902 brelse(di_bh);
2903 brelse(parent_di_bh);
2904 brelse(orphan_dir_bh);
2905
2906 ocfs2_free_dir_lookup_result(&lookup);
2907
2908 if (status)
2909 mlog_errno(status);
2910
2911 return status;
2912 }
2913
2914 const struct inode_operations ocfs2_dir_iops = {
2915 .create = ocfs2_create,
2916 .lookup = ocfs2_lookup,
2917 .link = ocfs2_link,
2918 .unlink = ocfs2_unlink,
2919 .rmdir = ocfs2_unlink,
2920 .symlink = ocfs2_symlink,
2921 .mkdir = ocfs2_mkdir,
2922 .mknod = ocfs2_mknod,
2923 .rename = ocfs2_rename,
2924 .setattr = ocfs2_setattr,
2925 .getattr = ocfs2_getattr,
2926 .permission = ocfs2_permission,
2927 .listxattr = ocfs2_listxattr,
2928 .fiemap = ocfs2_fiemap,
2929 .get_inode_acl = ocfs2_iop_get_acl,
2930 .set_acl = ocfs2_iop_set_acl,
2931 .fileattr_get = ocfs2_fileattr_get,
2932 .fileattr_set = ocfs2_fileattr_set,
2933 };
2934