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