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 inode_init_owner(&init_user_ns, inode, dir, mode);
201 status = dquot_initialize(inode);
202 if (status)
203 return ERR_PTR(status);
204
205 return inode;
206 }
207
ocfs2_cleanup_add_entry_failure(struct ocfs2_super * osb,struct dentry * dentry,struct inode * inode)208 static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb,
209 struct dentry *dentry, struct inode *inode)
210 {
211 struct ocfs2_dentry_lock *dl = dentry->d_fsdata;
212
213 ocfs2_simple_drop_lockres(osb, &dl->dl_lockres);
214 ocfs2_lock_res_free(&dl->dl_lockres);
215 BUG_ON(dl->dl_count != 1);
216 spin_lock(&dentry_attach_lock);
217 dentry->d_fsdata = NULL;
218 spin_unlock(&dentry_attach_lock);
219 kfree(dl);
220 iput(inode);
221 }
222
ocfs2_mknod(struct user_namespace * mnt_userns,struct inode * dir,struct dentry * dentry,umode_t mode,dev_t dev)223 static int ocfs2_mknod(struct user_namespace *mnt_userns,
224 struct inode *dir,
225 struct dentry *dentry,
226 umode_t mode,
227 dev_t dev)
228 {
229 int status = 0;
230 struct buffer_head *parent_fe_bh = NULL;
231 handle_t *handle = NULL;
232 struct ocfs2_super *osb;
233 struct ocfs2_dinode *dirfe;
234 struct buffer_head *new_fe_bh = NULL;
235 struct inode *inode = NULL;
236 struct ocfs2_alloc_context *inode_ac = NULL;
237 struct ocfs2_alloc_context *data_ac = NULL;
238 struct ocfs2_alloc_context *meta_ac = NULL;
239 int want_clusters = 0;
240 int want_meta = 0;
241 int xattr_credits = 0;
242 struct ocfs2_security_xattr_info si = {
243 .enable = 1,
244 };
245 int did_quota_inode = 0;
246 struct ocfs2_dir_lookup_result lookup = { NULL, };
247 sigset_t oldset;
248 int did_block_signals = 0;
249 struct ocfs2_dentry_lock *dl = NULL;
250
251 trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
252 (unsigned long long)OCFS2_I(dir)->ip_blkno,
253 (unsigned long)dev, mode);
254
255 status = dquot_initialize(dir);
256 if (status) {
257 mlog_errno(status);
258 return status;
259 }
260
261 /* get our super block */
262 osb = OCFS2_SB(dir->i_sb);
263
264 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
265 if (status < 0) {
266 if (status != -ENOENT)
267 mlog_errno(status);
268 return status;
269 }
270
271 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
272 status = -EMLINK;
273 goto leave;
274 }
275
276 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
277 if (!ocfs2_read_links_count(dirfe)) {
278 /* can't make a file in a deleted directory. */
279 status = -ENOENT;
280 goto leave;
281 }
282
283 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
284 dentry->d_name.len);
285 if (status)
286 goto leave;
287
288 /* get a spot inside the dir. */
289 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
290 dentry->d_name.name,
291 dentry->d_name.len, &lookup);
292 if (status < 0) {
293 mlog_errno(status);
294 goto leave;
295 }
296
297 /* reserve an inode spot */
298 status = ocfs2_reserve_new_inode(osb, &inode_ac);
299 if (status < 0) {
300 if (status != -ENOSPC)
301 mlog_errno(status);
302 goto leave;
303 }
304
305 inode = ocfs2_get_init_inode(dir, mode);
306 if (IS_ERR(inode)) {
307 status = PTR_ERR(inode);
308 inode = NULL;
309 mlog_errno(status);
310 goto leave;
311 }
312
313 /* get security xattr */
314 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
315 if (status) {
316 if (status == -EOPNOTSUPP)
317 si.enable = 0;
318 else {
319 mlog_errno(status);
320 goto leave;
321 }
322 }
323
324 /* calculate meta data/clusters for setting security and acl xattr */
325 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
326 &si, &want_clusters,
327 &xattr_credits, &want_meta);
328 if (status < 0) {
329 mlog_errno(status);
330 goto leave;
331 }
332
333 /* Reserve a cluster if creating an extent based directory. */
334 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
335 want_clusters += 1;
336
337 /* Dir indexing requires extra space as well */
338 if (ocfs2_supports_indexed_dirs(osb))
339 want_meta++;
340 }
341
342 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
343 if (status < 0) {
344 if (status != -ENOSPC)
345 mlog_errno(status);
346 goto leave;
347 }
348
349 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
350 if (status < 0) {
351 if (status != -ENOSPC)
352 mlog_errno(status);
353 goto leave;
354 }
355
356 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
357 S_ISDIR(mode),
358 xattr_credits));
359 if (IS_ERR(handle)) {
360 status = PTR_ERR(handle);
361 handle = NULL;
362 mlog_errno(status);
363 goto leave;
364 }
365
366 /* Starting to change things, restart is no longer possible. */
367 ocfs2_block_signals(&oldset);
368 did_block_signals = 1;
369
370 status = dquot_alloc_inode(inode);
371 if (status)
372 goto leave;
373 did_quota_inode = 1;
374
375 /* do the real work now. */
376 status = ocfs2_mknod_locked(osb, dir, inode, dev,
377 &new_fe_bh, parent_fe_bh, handle,
378 inode_ac);
379 if (status < 0) {
380 mlog_errno(status);
381 goto leave;
382 }
383
384 if (S_ISDIR(mode)) {
385 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
386 new_fe_bh, data_ac, meta_ac);
387 if (status < 0) {
388 mlog_errno(status);
389 goto leave;
390 }
391
392 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
393 parent_fe_bh,
394 OCFS2_JOURNAL_ACCESS_WRITE);
395 if (status < 0) {
396 mlog_errno(status);
397 goto leave;
398 }
399 ocfs2_add_links_count(dirfe, 1);
400 ocfs2_journal_dirty(handle, parent_fe_bh);
401 inc_nlink(dir);
402 }
403
404 status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
405 meta_ac, data_ac);
406
407 if (status < 0) {
408 mlog_errno(status);
409 goto roll_back;
410 }
411
412 if (si.enable) {
413 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
414 meta_ac, data_ac);
415 if (status < 0) {
416 mlog_errno(status);
417 goto roll_back;
418 }
419 }
420
421 /*
422 * Do this before adding the entry to the directory. We add
423 * also set d_op after success so that ->d_iput() will cleanup
424 * the dentry lock even if ocfs2_add_entry() fails below.
425 */
426 status = ocfs2_dentry_attach_lock(dentry, inode,
427 OCFS2_I(dir)->ip_blkno);
428 if (status) {
429 mlog_errno(status);
430 goto roll_back;
431 }
432
433 dl = dentry->d_fsdata;
434
435 status = ocfs2_add_entry(handle, dentry, inode,
436 OCFS2_I(inode)->ip_blkno, parent_fe_bh,
437 &lookup);
438 if (status < 0) {
439 mlog_errno(status);
440 goto roll_back;
441 }
442
443 insert_inode_hash(inode);
444 d_instantiate(dentry, inode);
445 status = 0;
446
447 roll_back:
448 if (status < 0 && S_ISDIR(mode)) {
449 ocfs2_add_links_count(dirfe, -1);
450 drop_nlink(dir);
451 }
452
453 leave:
454 if (status < 0 && did_quota_inode)
455 dquot_free_inode(inode);
456 if (handle)
457 ocfs2_commit_trans(osb, handle);
458
459 ocfs2_inode_unlock(dir, 1);
460 if (did_block_signals)
461 ocfs2_unblock_signals(&oldset);
462
463 brelse(new_fe_bh);
464 brelse(parent_fe_bh);
465 kfree(si.value);
466
467 ocfs2_free_dir_lookup_result(&lookup);
468
469 if (inode_ac)
470 ocfs2_free_alloc_context(inode_ac);
471
472 if (data_ac)
473 ocfs2_free_alloc_context(data_ac);
474
475 if (meta_ac)
476 ocfs2_free_alloc_context(meta_ac);
477
478 /*
479 * We should call iput after the i_mutex of the bitmap been
480 * unlocked in ocfs2_free_alloc_context, or the
481 * ocfs2_delete_inode will mutex_lock again.
482 */
483 if ((status < 0) && inode) {
484 if (dl)
485 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
486
487 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
488 clear_nlink(inode);
489 iput(inode);
490 }
491
492 if (status)
493 mlog_errno(status);
494
495 return status;
496 }
497
__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)498 static int __ocfs2_mknod_locked(struct inode *dir,
499 struct inode *inode,
500 dev_t dev,
501 struct buffer_head **new_fe_bh,
502 struct buffer_head *parent_fe_bh,
503 handle_t *handle,
504 struct ocfs2_alloc_context *inode_ac,
505 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
506 {
507 int status = 0;
508 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
509 struct ocfs2_dinode *fe = NULL;
510 struct ocfs2_extent_list *fel;
511 u16 feat;
512 struct ocfs2_inode_info *oi = OCFS2_I(inode);
513 struct timespec64 ts;
514
515 *new_fe_bh = NULL;
516
517 /* populate as many fields early on as possible - many of
518 * these are used by the support functions here and in
519 * callers. */
520 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
521 oi->ip_blkno = fe_blkno;
522 spin_lock(&osb->osb_lock);
523 inode->i_generation = osb->s_next_generation++;
524 spin_unlock(&osb->osb_lock);
525
526 *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
527 if (!*new_fe_bh) {
528 status = -ENOMEM;
529 mlog_errno(status);
530 goto leave;
531 }
532 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
533
534 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
535 *new_fe_bh,
536 OCFS2_JOURNAL_ACCESS_CREATE);
537 if (status < 0) {
538 mlog_errno(status);
539 goto leave;
540 }
541
542 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
543 memset(fe, 0, osb->sb->s_blocksize);
544
545 fe->i_generation = cpu_to_le32(inode->i_generation);
546 fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
547 fe->i_blkno = cpu_to_le64(fe_blkno);
548 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
549 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
550 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
551 fe->i_uid = cpu_to_le32(i_uid_read(inode));
552 fe->i_gid = cpu_to_le32(i_gid_read(inode));
553 fe->i_mode = cpu_to_le16(inode->i_mode);
554 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
555 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
556
557 ocfs2_set_links_count(fe, inode->i_nlink);
558
559 fe->i_last_eb_blk = 0;
560 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
561 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
562 ktime_get_real_ts64(&ts);
563 fe->i_atime = fe->i_ctime = fe->i_mtime =
564 cpu_to_le64(ts.tv_sec);
565 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
566 cpu_to_le32(ts.tv_nsec);
567 fe->i_dtime = 0;
568
569 /*
570 * If supported, directories start with inline data. If inline
571 * isn't supported, but indexing is, we start them as indexed.
572 */
573 feat = le16_to_cpu(fe->i_dyn_features);
574 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
575 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
576
577 fe->id2.i_data.id_count = cpu_to_le16(
578 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
579 } else {
580 fel = &fe->id2.i_list;
581 fel->l_tree_depth = 0;
582 fel->l_next_free_rec = 0;
583 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
584 }
585
586 ocfs2_journal_dirty(handle, *new_fe_bh);
587
588 ocfs2_populate_inode(inode, fe, 1);
589 ocfs2_ci_set_new(osb, INODE_CACHE(inode));
590 if (!ocfs2_mount_local(osb)) {
591 status = ocfs2_create_new_inode_locks(inode);
592 if (status < 0)
593 mlog_errno(status);
594 }
595
596 ocfs2_update_inode_fsync_trans(handle, inode, 1);
597
598 leave:
599 if (status < 0) {
600 if (*new_fe_bh) {
601 brelse(*new_fe_bh);
602 *new_fe_bh = NULL;
603 }
604 }
605
606 if (status)
607 mlog_errno(status);
608 return status;
609 }
610
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)611 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
612 struct inode *dir,
613 struct inode *inode,
614 dev_t dev,
615 struct buffer_head **new_fe_bh,
616 struct buffer_head *parent_fe_bh,
617 handle_t *handle,
618 struct ocfs2_alloc_context *inode_ac)
619 {
620 int status = 0;
621 u64 suballoc_loc, fe_blkno = 0;
622 u16 suballoc_bit;
623
624 *new_fe_bh = NULL;
625
626 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
627 inode_ac, &suballoc_loc,
628 &suballoc_bit, &fe_blkno);
629 if (status < 0) {
630 mlog_errno(status);
631 return status;
632 }
633
634 status = __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
635 parent_fe_bh, handle, inode_ac,
636 fe_blkno, suballoc_loc, suballoc_bit);
637 if (status < 0) {
638 u64 bg_blkno = ocfs2_which_suballoc_group(fe_blkno, suballoc_bit);
639 int tmp = ocfs2_free_suballoc_bits(handle, inode_ac->ac_inode,
640 inode_ac->ac_bh, suballoc_bit, bg_blkno, 1);
641 if (tmp)
642 mlog_errno(tmp);
643 }
644
645 return status;
646 }
647
ocfs2_mkdir(struct user_namespace * mnt_userns,struct inode * dir,struct dentry * dentry,umode_t mode)648 static int ocfs2_mkdir(struct user_namespace *mnt_userns,
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(&init_user_ns, dir, dentry, mode | S_IFDIR, 0);
658 if (ret)
659 mlog_errno(ret);
660
661 return ret;
662 }
663
ocfs2_create(struct user_namespace * mnt_userns,struct inode * dir,struct dentry * dentry,umode_t mode,bool excl)664 static int ocfs2_create(struct user_namespace *mnt_userns,
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(&init_user_ns, 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->i_ctime = current_time(inode);
799 ocfs2_set_links_count(fe, inode->i_nlink);
800 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
801 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
802 ocfs2_journal_dirty(handle, fe_bh);
803
804 err = ocfs2_add_entry(handle, dentry, inode,
805 OCFS2_I(inode)->ip_blkno,
806 parent_fe_bh, &lookup);
807 if (err) {
808 ocfs2_add_links_count(fe, -1);
809 drop_nlink(inode);
810 mlog_errno(err);
811 goto out_commit;
812 }
813
814 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
815 if (err) {
816 mlog_errno(err);
817 goto out_commit;
818 }
819
820 ihold(inode);
821 d_instantiate(dentry, inode);
822
823 out_commit:
824 ocfs2_commit_trans(osb, handle);
825 ocfs2_unblock_signals(&oldset);
826 out_unlock_inode:
827 ocfs2_inode_unlock(inode, 1);
828
829 out:
830 ocfs2_double_unlock(old_dir, dir);
831
832 brelse(fe_bh);
833 brelse(parent_fe_bh);
834 brelse(old_dir_bh);
835
836 ocfs2_free_dir_lookup_result(&lookup);
837
838 if (err)
839 mlog_errno(err);
840
841 return err;
842 }
843
844 /*
845 * Takes and drops an exclusive lock on the given dentry. This will
846 * force other nodes to drop it.
847 */
ocfs2_remote_dentry_delete(struct dentry * dentry)848 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
849 {
850 int ret;
851
852 ret = ocfs2_dentry_lock(dentry, 1);
853 if (ret)
854 mlog_errno(ret);
855 else
856 ocfs2_dentry_unlock(dentry, 1);
857
858 return ret;
859 }
860
ocfs2_inode_is_unlinkable(struct inode * inode)861 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
862 {
863 if (S_ISDIR(inode->i_mode)) {
864 if (inode->i_nlink == 2)
865 return 1;
866 return 0;
867 }
868
869 if (inode->i_nlink == 1)
870 return 1;
871 return 0;
872 }
873
ocfs2_unlink(struct inode * dir,struct dentry * dentry)874 static int ocfs2_unlink(struct inode *dir,
875 struct dentry *dentry)
876 {
877 int status;
878 int child_locked = 0;
879 bool is_unlinkable = false;
880 struct inode *inode = d_inode(dentry);
881 struct inode *orphan_dir = NULL;
882 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
883 u64 blkno;
884 struct ocfs2_dinode *fe = NULL;
885 struct buffer_head *fe_bh = NULL;
886 struct buffer_head *parent_node_bh = NULL;
887 handle_t *handle = NULL;
888 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
889 struct ocfs2_dir_lookup_result lookup = { NULL, };
890 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
891
892 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
893 dentry->d_name.name,
894 (unsigned long long)OCFS2_I(dir)->ip_blkno,
895 (unsigned long long)OCFS2_I(inode)->ip_blkno);
896
897 status = dquot_initialize(dir);
898 if (status) {
899 mlog_errno(status);
900 return status;
901 }
902
903 BUG_ON(d_inode(dentry->d_parent) != dir);
904
905 if (inode == osb->root_inode)
906 return -EPERM;
907
908 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
909 OI_LS_PARENT);
910 if (status < 0) {
911 if (status != -ENOENT)
912 mlog_errno(status);
913 return status;
914 }
915
916 status = ocfs2_find_files_on_disk(dentry->d_name.name,
917 dentry->d_name.len, &blkno, dir,
918 &lookup);
919 if (status < 0) {
920 if (status != -ENOENT)
921 mlog_errno(status);
922 goto leave;
923 }
924
925 if (OCFS2_I(inode)->ip_blkno != blkno) {
926 status = -ENOENT;
927
928 trace_ocfs2_unlink_noent(
929 (unsigned long long)OCFS2_I(inode)->ip_blkno,
930 (unsigned long long)blkno,
931 OCFS2_I(inode)->ip_flags);
932 goto leave;
933 }
934
935 status = ocfs2_inode_lock(inode, &fe_bh, 1);
936 if (status < 0) {
937 if (status != -ENOENT)
938 mlog_errno(status);
939 goto leave;
940 }
941 child_locked = 1;
942
943 if (S_ISDIR(inode->i_mode)) {
944 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
945 status = -ENOTEMPTY;
946 goto leave;
947 }
948 }
949
950 status = ocfs2_remote_dentry_delete(dentry);
951 if (status < 0) {
952 /* This remote delete should succeed under all normal
953 * circumstances. */
954 mlog_errno(status);
955 goto leave;
956 }
957
958 if (ocfs2_inode_is_unlinkable(inode)) {
959 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
960 OCFS2_I(inode)->ip_blkno,
961 orphan_name, &orphan_insert,
962 false);
963 if (status < 0) {
964 mlog_errno(status);
965 goto leave;
966 }
967 is_unlinkable = true;
968 }
969
970 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
971 if (IS_ERR(handle)) {
972 status = PTR_ERR(handle);
973 handle = NULL;
974 mlog_errno(status);
975 goto leave;
976 }
977
978 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
979 OCFS2_JOURNAL_ACCESS_WRITE);
980 if (status < 0) {
981 mlog_errno(status);
982 goto leave;
983 }
984
985 fe = (struct ocfs2_dinode *) fe_bh->b_data;
986
987 /* delete the name from the parent dir */
988 status = ocfs2_delete_entry(handle, dir, &lookup);
989 if (status < 0) {
990 mlog_errno(status);
991 goto leave;
992 }
993
994 if (S_ISDIR(inode->i_mode))
995 drop_nlink(inode);
996 drop_nlink(inode);
997 ocfs2_set_links_count(fe, inode->i_nlink);
998 ocfs2_journal_dirty(handle, fe_bh);
999
1000 dir->i_ctime = dir->i_mtime = current_time(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 user_namespace * mnt_userns,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 user_namespace *mnt_userns,
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 }
1541
1542 old_inode->i_ctime = current_time(old_inode);
1543 mark_inode_dirty(old_inode);
1544
1545 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1546 old_inode_bh,
1547 OCFS2_JOURNAL_ACCESS_WRITE);
1548 if (status >= 0) {
1549 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1550
1551 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1552 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1553 ocfs2_journal_dirty(handle, old_inode_bh);
1554 } else
1555 mlog_errno(status);
1556
1557 /*
1558 * Now that the name has been added to new_dir, remove the old name.
1559 *
1560 * We don't keep any directory entry context around until now
1561 * because the insert might have changed the type of directory
1562 * we're dealing with.
1563 */
1564 status = ocfs2_find_entry(old_dentry->d_name.name,
1565 old_dentry->d_name.len, old_dir,
1566 &old_entry_lookup);
1567 if (status) {
1568 if (!is_journal_aborted(osb->journal->j_journal)) {
1569 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1570 "is not deleted.",
1571 new_dentry->d_name.len, new_dentry->d_name.name,
1572 old_dentry->d_name.len, old_dentry->d_name.name);
1573 }
1574 goto bail;
1575 }
1576
1577 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1578 if (status < 0) {
1579 mlog_errno(status);
1580 if (!is_journal_aborted(osb->journal->j_journal)) {
1581 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1582 "is not deleted.",
1583 new_dentry->d_name.len, new_dentry->d_name.name,
1584 old_dentry->d_name.len, old_dentry->d_name.name);
1585 }
1586 goto bail;
1587 }
1588
1589 if (new_inode) {
1590 drop_nlink(new_inode);
1591 new_inode->i_ctime = current_time(new_inode);
1592 }
1593 old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir);
1594
1595 if (update_dot_dot) {
1596 status = ocfs2_update_entry(old_inode, handle,
1597 &old_inode_dot_dot_res, new_dir);
1598 drop_nlink(old_dir);
1599 if (new_inode) {
1600 drop_nlink(new_inode);
1601 } else {
1602 inc_nlink(new_dir);
1603 mark_inode_dirty(new_dir);
1604 }
1605 }
1606 mark_inode_dirty(old_dir);
1607 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1608 if (new_inode) {
1609 mark_inode_dirty(new_inode);
1610 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1611 }
1612
1613 if (old_dir != new_dir) {
1614 /* Keep the same times on both directories.*/
1615 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1616
1617 /*
1618 * This will also pick up the i_nlink change from the
1619 * block above.
1620 */
1621 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1622 }
1623
1624 if (old_dir_nlink != old_dir->i_nlink) {
1625 if (!old_dir_bh) {
1626 mlog(ML_ERROR, "need to change nlink for old dir "
1627 "%llu from %d to %d but bh is NULL!\n",
1628 (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1629 (int)old_dir_nlink, old_dir->i_nlink);
1630 } else {
1631 struct ocfs2_dinode *fe;
1632 status = ocfs2_journal_access_di(handle,
1633 INODE_CACHE(old_dir),
1634 old_dir_bh,
1635 OCFS2_JOURNAL_ACCESS_WRITE);
1636 fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1637 ocfs2_set_links_count(fe, old_dir->i_nlink);
1638 ocfs2_journal_dirty(handle, old_dir_bh);
1639 }
1640 }
1641 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1642 status = 0;
1643 bail:
1644 if (handle)
1645 ocfs2_commit_trans(osb, handle);
1646
1647 if (orphan_dir) {
1648 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1649 ocfs2_inode_unlock(orphan_dir, 1);
1650 inode_unlock(orphan_dir);
1651 iput(orphan_dir);
1652 }
1653
1654 if (new_child_locked)
1655 ocfs2_inode_unlock(new_inode, 1);
1656
1657 if (old_child_locked)
1658 ocfs2_inode_unlock(old_inode, 1);
1659
1660 if (parents_locked)
1661 ocfs2_double_unlock(old_dir, new_dir);
1662
1663 if (rename_lock)
1664 ocfs2_rename_unlock(osb);
1665
1666 if (new_inode)
1667 sync_mapping_buffers(old_inode->i_mapping);
1668
1669 iput(new_inode);
1670
1671 ocfs2_free_dir_lookup_result(&target_lookup_res);
1672 ocfs2_free_dir_lookup_result(&old_entry_lookup);
1673 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1674 ocfs2_free_dir_lookup_result(&orphan_insert);
1675 ocfs2_free_dir_lookup_result(&target_insert);
1676
1677 brelse(newfe_bh);
1678 brelse(old_inode_bh);
1679 brelse(old_dir_bh);
1680 brelse(new_dir_bh);
1681
1682 if (status)
1683 mlog_errno(status);
1684
1685 return status;
1686 }
1687
1688 /*
1689 * we expect i_size = strlen(symname). Copy symname into the file
1690 * data, including the null terminator.
1691 */
ocfs2_create_symlink_data(struct ocfs2_super * osb,handle_t * handle,struct inode * inode,const char * symname)1692 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1693 handle_t *handle,
1694 struct inode *inode,
1695 const char *symname)
1696 {
1697 struct buffer_head **bhs = NULL;
1698 const char *c;
1699 struct super_block *sb = osb->sb;
1700 u64 p_blkno, p_blocks;
1701 int virtual, blocks, status, i, bytes_left;
1702
1703 bytes_left = i_size_read(inode) + 1;
1704 /* we can't trust i_blocks because we're actually going to
1705 * write i_size + 1 bytes. */
1706 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1707
1708 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1709 i_size_read(inode), blocks);
1710
1711 /* Sanity check -- make sure we're going to fit. */
1712 if (bytes_left >
1713 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1714 status = -EIO;
1715 mlog_errno(status);
1716 goto bail;
1717 }
1718
1719 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1720 if (!bhs) {
1721 status = -ENOMEM;
1722 mlog_errno(status);
1723 goto bail;
1724 }
1725
1726 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1727 NULL);
1728 if (status < 0) {
1729 mlog_errno(status);
1730 goto bail;
1731 }
1732
1733 /* links can never be larger than one cluster so we know this
1734 * is all going to be contiguous, but do a sanity check
1735 * anyway. */
1736 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1737 status = -EIO;
1738 mlog_errno(status);
1739 goto bail;
1740 }
1741
1742 virtual = 0;
1743 while(bytes_left > 0) {
1744 c = &symname[virtual * sb->s_blocksize];
1745
1746 bhs[virtual] = sb_getblk(sb, p_blkno);
1747 if (!bhs[virtual]) {
1748 status = -ENOMEM;
1749 mlog_errno(status);
1750 goto bail;
1751 }
1752 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1753 bhs[virtual]);
1754
1755 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1756 bhs[virtual],
1757 OCFS2_JOURNAL_ACCESS_CREATE);
1758 if (status < 0) {
1759 mlog_errno(status);
1760 goto bail;
1761 }
1762
1763 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1764
1765 memcpy(bhs[virtual]->b_data, c,
1766 (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1767 bytes_left);
1768
1769 ocfs2_journal_dirty(handle, bhs[virtual]);
1770
1771 virtual++;
1772 p_blkno++;
1773 bytes_left -= sb->s_blocksize;
1774 }
1775
1776 status = 0;
1777 bail:
1778
1779 if (bhs) {
1780 for(i = 0; i < blocks; i++)
1781 brelse(bhs[i]);
1782 kfree(bhs);
1783 }
1784
1785 if (status)
1786 mlog_errno(status);
1787 return status;
1788 }
1789
ocfs2_symlink(struct user_namespace * mnt_userns,struct inode * dir,struct dentry * dentry,const char * symname)1790 static int ocfs2_symlink(struct user_namespace *mnt_userns,
1791 struct inode *dir,
1792 struct dentry *dentry,
1793 const char *symname)
1794 {
1795 int status, l, credits;
1796 u64 newsize;
1797 struct ocfs2_super *osb = NULL;
1798 struct inode *inode = NULL;
1799 struct super_block *sb;
1800 struct buffer_head *new_fe_bh = NULL;
1801 struct buffer_head *parent_fe_bh = NULL;
1802 struct ocfs2_dinode *fe = NULL;
1803 struct ocfs2_dinode *dirfe;
1804 handle_t *handle = NULL;
1805 struct ocfs2_alloc_context *inode_ac = NULL;
1806 struct ocfs2_alloc_context *data_ac = NULL;
1807 struct ocfs2_alloc_context *xattr_ac = NULL;
1808 int want_clusters = 0;
1809 int xattr_credits = 0;
1810 struct ocfs2_security_xattr_info si = {
1811 .enable = 1,
1812 };
1813 int did_quota = 0, did_quota_inode = 0;
1814 struct ocfs2_dir_lookup_result lookup = { NULL, };
1815 sigset_t oldset;
1816 int did_block_signals = 0;
1817 struct ocfs2_dentry_lock *dl = NULL;
1818
1819 trace_ocfs2_symlink_begin(dir, dentry, symname,
1820 dentry->d_name.len, dentry->d_name.name);
1821
1822 status = dquot_initialize(dir);
1823 if (status) {
1824 mlog_errno(status);
1825 goto bail;
1826 }
1827
1828 sb = dir->i_sb;
1829 osb = OCFS2_SB(sb);
1830
1831 l = strlen(symname) + 1;
1832
1833 credits = ocfs2_calc_symlink_credits(sb);
1834
1835 /* lock the parent directory */
1836 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1837 if (status < 0) {
1838 if (status != -ENOENT)
1839 mlog_errno(status);
1840 return status;
1841 }
1842
1843 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1844 if (!ocfs2_read_links_count(dirfe)) {
1845 /* can't make a file in a deleted directory. */
1846 status = -ENOENT;
1847 goto bail;
1848 }
1849
1850 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1851 dentry->d_name.len);
1852 if (status)
1853 goto bail;
1854
1855 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1856 dentry->d_name.name,
1857 dentry->d_name.len, &lookup);
1858 if (status < 0) {
1859 mlog_errno(status);
1860 goto bail;
1861 }
1862
1863 status = ocfs2_reserve_new_inode(osb, &inode_ac);
1864 if (status < 0) {
1865 if (status != -ENOSPC)
1866 mlog_errno(status);
1867 goto bail;
1868 }
1869
1870 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1871 if (IS_ERR(inode)) {
1872 status = PTR_ERR(inode);
1873 inode = NULL;
1874 mlog_errno(status);
1875 goto bail;
1876 }
1877
1878 /* get security xattr */
1879 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1880 if (status) {
1881 if (status == -EOPNOTSUPP)
1882 si.enable = 0;
1883 else {
1884 mlog_errno(status);
1885 goto bail;
1886 }
1887 }
1888
1889 /* calculate meta data/clusters for setting security xattr */
1890 if (si.enable) {
1891 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1892 &xattr_credits, &xattr_ac);
1893 if (status < 0) {
1894 mlog_errno(status);
1895 goto bail;
1896 }
1897 }
1898
1899 /* don't reserve bitmap space for fast symlinks. */
1900 if (l > ocfs2_fast_symlink_chars(sb))
1901 want_clusters += 1;
1902
1903 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1904 if (status < 0) {
1905 if (status != -ENOSPC)
1906 mlog_errno(status);
1907 goto bail;
1908 }
1909
1910 handle = ocfs2_start_trans(osb, credits + xattr_credits);
1911 if (IS_ERR(handle)) {
1912 status = PTR_ERR(handle);
1913 handle = NULL;
1914 mlog_errno(status);
1915 goto bail;
1916 }
1917
1918 /* Starting to change things, restart is no longer possible. */
1919 ocfs2_block_signals(&oldset);
1920 did_block_signals = 1;
1921
1922 status = dquot_alloc_inode(inode);
1923 if (status)
1924 goto bail;
1925 did_quota_inode = 1;
1926
1927 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1928 dentry->d_name.name,
1929 (unsigned long long)OCFS2_I(dir)->ip_blkno,
1930 inode->i_mode);
1931
1932 status = ocfs2_mknod_locked(osb, dir, inode,
1933 0, &new_fe_bh, parent_fe_bh, handle,
1934 inode_ac);
1935 if (status < 0) {
1936 mlog_errno(status);
1937 goto bail;
1938 }
1939
1940 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1941 inode->i_rdev = 0;
1942 newsize = l - 1;
1943 inode->i_op = &ocfs2_symlink_inode_operations;
1944 inode_nohighmem(inode);
1945 if (l > ocfs2_fast_symlink_chars(sb)) {
1946 u32 offset = 0;
1947
1948 status = dquot_alloc_space_nodirty(inode,
1949 ocfs2_clusters_to_bytes(osb->sb, 1));
1950 if (status)
1951 goto bail;
1952 did_quota = 1;
1953 inode->i_mapping->a_ops = &ocfs2_aops;
1954 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1955 new_fe_bh,
1956 handle, data_ac, NULL,
1957 NULL);
1958 if (status < 0) {
1959 if (status != -ENOSPC && status != -EINTR) {
1960 mlog(ML_ERROR,
1961 "Failed to extend file to %llu\n",
1962 (unsigned long long)newsize);
1963 mlog_errno(status);
1964 status = -ENOSPC;
1965 }
1966 goto bail;
1967 }
1968 i_size_write(inode, newsize);
1969 inode->i_blocks = ocfs2_inode_sector_count(inode);
1970 } else {
1971 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1972 memcpy((char *) fe->id2.i_symlink, symname, l);
1973 i_size_write(inode, newsize);
1974 inode->i_blocks = 0;
1975 }
1976
1977 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1978 if (status < 0) {
1979 mlog_errno(status);
1980 goto bail;
1981 }
1982
1983 if (!ocfs2_inode_is_fast_symlink(inode)) {
1984 status = ocfs2_create_symlink_data(osb, handle, inode,
1985 symname);
1986 if (status < 0) {
1987 mlog_errno(status);
1988 goto bail;
1989 }
1990 }
1991
1992 if (si.enable) {
1993 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1994 xattr_ac, data_ac);
1995 if (status < 0) {
1996 mlog_errno(status);
1997 goto bail;
1998 }
1999 }
2000
2001 /*
2002 * Do this before adding the entry to the directory. We add
2003 * also set d_op after success so that ->d_iput() will cleanup
2004 * the dentry lock even if ocfs2_add_entry() fails below.
2005 */
2006 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
2007 if (status) {
2008 mlog_errno(status);
2009 goto bail;
2010 }
2011
2012 dl = dentry->d_fsdata;
2013
2014 status = ocfs2_add_entry(handle, dentry, inode,
2015 le64_to_cpu(fe->i_blkno), parent_fe_bh,
2016 &lookup);
2017 if (status < 0) {
2018 mlog_errno(status);
2019 goto bail;
2020 }
2021
2022 insert_inode_hash(inode);
2023 d_instantiate(dentry, inode);
2024 bail:
2025 if (status < 0 && did_quota)
2026 dquot_free_space_nodirty(inode,
2027 ocfs2_clusters_to_bytes(osb->sb, 1));
2028 if (status < 0 && did_quota_inode)
2029 dquot_free_inode(inode);
2030 if (handle)
2031 ocfs2_commit_trans(osb, handle);
2032
2033 ocfs2_inode_unlock(dir, 1);
2034 if (did_block_signals)
2035 ocfs2_unblock_signals(&oldset);
2036
2037 brelse(new_fe_bh);
2038 brelse(parent_fe_bh);
2039 kfree(si.value);
2040 ocfs2_free_dir_lookup_result(&lookup);
2041 if (inode_ac)
2042 ocfs2_free_alloc_context(inode_ac);
2043 if (data_ac)
2044 ocfs2_free_alloc_context(data_ac);
2045 if (xattr_ac)
2046 ocfs2_free_alloc_context(xattr_ac);
2047 if ((status < 0) && inode) {
2048 if (dl)
2049 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2050
2051 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
2052 clear_nlink(inode);
2053 iput(inode);
2054 }
2055
2056 if (status)
2057 mlog_errno(status);
2058
2059 return status;
2060 }
2061
ocfs2_blkno_stringify(u64 blkno,char * name)2062 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2063 {
2064 int status, namelen;
2065
2066 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2067 (long long)blkno);
2068 if (namelen <= 0) {
2069 if (namelen)
2070 status = namelen;
2071 else
2072 status = -EINVAL;
2073 mlog_errno(status);
2074 goto bail;
2075 }
2076 if (namelen != OCFS2_ORPHAN_NAMELEN) {
2077 status = -EINVAL;
2078 mlog_errno(status);
2079 goto bail;
2080 }
2081
2082 trace_ocfs2_blkno_stringify(blkno, name, namelen);
2083
2084 status = 0;
2085 bail:
2086 if (status < 0)
2087 mlog_errno(status);
2088 return status;
2089 }
2090
ocfs2_lookup_lock_orphan_dir(struct ocfs2_super * osb,struct inode ** ret_orphan_dir,struct buffer_head ** ret_orphan_dir_bh)2091 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2092 struct inode **ret_orphan_dir,
2093 struct buffer_head **ret_orphan_dir_bh)
2094 {
2095 struct inode *orphan_dir_inode;
2096 struct buffer_head *orphan_dir_bh = NULL;
2097 int ret = 0;
2098
2099 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2100 ORPHAN_DIR_SYSTEM_INODE,
2101 osb->slot_num);
2102 if (!orphan_dir_inode) {
2103 ret = -ENOENT;
2104 mlog_errno(ret);
2105 return ret;
2106 }
2107
2108 inode_lock(orphan_dir_inode);
2109
2110 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2111 if (ret < 0) {
2112 inode_unlock(orphan_dir_inode);
2113 iput(orphan_dir_inode);
2114
2115 mlog_errno(ret);
2116 return ret;
2117 }
2118
2119 *ret_orphan_dir = orphan_dir_inode;
2120 *ret_orphan_dir_bh = orphan_dir_bh;
2121
2122 return 0;
2123 }
2124
__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)2125 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2126 struct buffer_head *orphan_dir_bh,
2127 u64 blkno,
2128 char *name,
2129 struct ocfs2_dir_lookup_result *lookup,
2130 bool dio)
2131 {
2132 int ret;
2133 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2134 int namelen = dio ?
2135 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2136 OCFS2_ORPHAN_NAMELEN;
2137
2138 if (dio) {
2139 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2140 OCFS2_DIO_ORPHAN_PREFIX);
2141 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2142 ret = -EINVAL;
2143 mlog_errno(ret);
2144 return ret;
2145 }
2146
2147 ret = ocfs2_blkno_stringify(blkno,
2148 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2149 } else
2150 ret = ocfs2_blkno_stringify(blkno, name);
2151 if (ret < 0) {
2152 mlog_errno(ret);
2153 return ret;
2154 }
2155
2156 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2157 orphan_dir_bh, name,
2158 namelen, lookup);
2159 if (ret < 0) {
2160 mlog_errno(ret);
2161 return ret;
2162 }
2163
2164 return 0;
2165 }
2166
2167 /**
2168 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2169 * insertion of an orphan.
2170 * @osb: ocfs2 file system
2171 * @ret_orphan_dir: Orphan dir inode - returned locked!
2172 * @blkno: Actual block number of the inode to be inserted into orphan dir.
2173 * @lookup: dir lookup result, to be passed back into functions like
2174 * ocfs2_orphan_add
2175 *
2176 * Returns zero on success and the ret_orphan_dir, name and lookup
2177 * fields will be populated.
2178 *
2179 * Returns non-zero on failure.
2180 */
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)2181 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2182 struct inode **ret_orphan_dir,
2183 u64 blkno,
2184 char *name,
2185 struct ocfs2_dir_lookup_result *lookup,
2186 bool dio)
2187 {
2188 struct inode *orphan_dir_inode = NULL;
2189 struct buffer_head *orphan_dir_bh = NULL;
2190 int ret = 0;
2191
2192 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2193 &orphan_dir_bh);
2194 if (ret < 0) {
2195 mlog_errno(ret);
2196 return ret;
2197 }
2198
2199 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2200 blkno, name, lookup, dio);
2201 if (ret < 0) {
2202 mlog_errno(ret);
2203 goto out;
2204 }
2205
2206 *ret_orphan_dir = orphan_dir_inode;
2207
2208 out:
2209 brelse(orphan_dir_bh);
2210
2211 if (ret) {
2212 ocfs2_inode_unlock(orphan_dir_inode, 1);
2213 inode_unlock(orphan_dir_inode);
2214 iput(orphan_dir_inode);
2215 }
2216
2217 if (ret)
2218 mlog_errno(ret);
2219 return ret;
2220 }
2221
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)2222 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2223 handle_t *handle,
2224 struct inode *inode,
2225 struct buffer_head *fe_bh,
2226 char *name,
2227 struct ocfs2_dir_lookup_result *lookup,
2228 struct inode *orphan_dir_inode,
2229 bool dio)
2230 {
2231 struct buffer_head *orphan_dir_bh = NULL;
2232 int status = 0;
2233 struct ocfs2_dinode *orphan_fe;
2234 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2235 int namelen = dio ?
2236 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2237 OCFS2_ORPHAN_NAMELEN;
2238
2239 trace_ocfs2_orphan_add_begin(
2240 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2241
2242 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2243 if (status < 0) {
2244 mlog_errno(status);
2245 goto leave;
2246 }
2247
2248 status = ocfs2_journal_access_di(handle,
2249 INODE_CACHE(orphan_dir_inode),
2250 orphan_dir_bh,
2251 OCFS2_JOURNAL_ACCESS_WRITE);
2252 if (status < 0) {
2253 mlog_errno(status);
2254 goto leave;
2255 }
2256
2257 /*
2258 * We're going to journal the change of i_flags and i_orphaned_slot.
2259 * It's safe anyway, though some callers may duplicate the journaling.
2260 * Journaling within the func just make the logic look more
2261 * straightforward.
2262 */
2263 status = ocfs2_journal_access_di(handle,
2264 INODE_CACHE(inode),
2265 fe_bh,
2266 OCFS2_JOURNAL_ACCESS_WRITE);
2267 if (status < 0) {
2268 mlog_errno(status);
2269 goto leave;
2270 }
2271
2272 /* we're a cluster, and nlink can change on disk from
2273 * underneath us... */
2274 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2275 if (S_ISDIR(inode->i_mode))
2276 ocfs2_add_links_count(orphan_fe, 1);
2277 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2278 ocfs2_journal_dirty(handle, orphan_dir_bh);
2279
2280 status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2281 namelen, inode,
2282 OCFS2_I(inode)->ip_blkno,
2283 orphan_dir_bh, lookup);
2284 if (status < 0) {
2285 mlog_errno(status);
2286 goto rollback;
2287 }
2288
2289 if (dio) {
2290 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan
2291 * slot.
2292 */
2293 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2294 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num);
2295 } else {
2296 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2297 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2298
2299 /* Record which orphan dir our inode now resides
2300 * in. delete_inode will use this to determine which orphan
2301 * dir to lock. */
2302 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2303 }
2304
2305 ocfs2_journal_dirty(handle, fe_bh);
2306
2307 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2308 osb->slot_num);
2309
2310 rollback:
2311 if (status < 0) {
2312 if (S_ISDIR(inode->i_mode))
2313 ocfs2_add_links_count(orphan_fe, -1);
2314 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2315 }
2316
2317 leave:
2318 brelse(orphan_dir_bh);
2319
2320 return status;
2321 }
2322
2323 /* 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)2324 int ocfs2_orphan_del(struct ocfs2_super *osb,
2325 handle_t *handle,
2326 struct inode *orphan_dir_inode,
2327 struct inode *inode,
2328 struct buffer_head *orphan_dir_bh,
2329 bool dio)
2330 {
2331 char name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2332 struct ocfs2_dinode *orphan_fe;
2333 int status = 0;
2334 struct ocfs2_dir_lookup_result lookup = { NULL, };
2335
2336 if (dio) {
2337 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2338 OCFS2_DIO_ORPHAN_PREFIX);
2339 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2340 status = -EINVAL;
2341 mlog_errno(status);
2342 return status;
2343 }
2344
2345 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno,
2346 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2347 } else
2348 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2349 if (status < 0) {
2350 mlog_errno(status);
2351 goto leave;
2352 }
2353
2354 trace_ocfs2_orphan_del(
2355 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2356 name, strlen(name));
2357
2358 status = ocfs2_journal_access_di(handle,
2359 INODE_CACHE(orphan_dir_inode),
2360 orphan_dir_bh,
2361 OCFS2_JOURNAL_ACCESS_WRITE);
2362 if (status < 0) {
2363 mlog_errno(status);
2364 goto leave;
2365 }
2366
2367 /* find it's spot in the orphan directory */
2368 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode,
2369 &lookup);
2370 if (status) {
2371 mlog_errno(status);
2372 goto leave;
2373 }
2374
2375 /* remove it from the orphan directory */
2376 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2377 if (status < 0) {
2378 mlog_errno(status);
2379 goto leave;
2380 }
2381
2382 /* do the i_nlink dance! :) */
2383 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2384 if (S_ISDIR(inode->i_mode))
2385 ocfs2_add_links_count(orphan_fe, -1);
2386 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2387 ocfs2_journal_dirty(handle, orphan_dir_bh);
2388
2389 leave:
2390 ocfs2_free_dir_lookup_result(&lookup);
2391
2392 if (status)
2393 mlog_errno(status);
2394 return status;
2395 }
2396
2397 /**
2398 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2399 * allocated file. This is different from the typical 'add to orphan dir'
2400 * operation in that the inode does not yet exist. This is a problem because
2401 * the orphan dir stringifies the inode block number to come up with it's
2402 * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2403 * problem. This function works around it by calling deeper into the orphan
2404 * and suballoc code than other callers. Use this only by necessity.
2405 * @dir: The directory which this inode will ultimately wind up under - not the
2406 * orphan dir!
2407 * @dir_bh: buffer_head the @dir inode block
2408 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2409 * with the string to be used for orphan dirent. Pass back to the orphan dir
2410 * code.
2411 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2412 * dir code.
2413 * @ret_di_blkno: block number where the new inode will be allocated.
2414 * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2415 * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2416 *
2417 * Returns zero on success and the ret_orphan_dir, name and lookup
2418 * fields will be populated.
2419 *
2420 * Returns non-zero on failure.
2421 */
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)2422 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2423 struct buffer_head *dir_bh,
2424 char *orphan_name,
2425 struct inode **ret_orphan_dir,
2426 u64 *ret_di_blkno,
2427 struct ocfs2_dir_lookup_result *orphan_insert,
2428 struct ocfs2_alloc_context **ret_inode_ac)
2429 {
2430 int ret;
2431 u64 di_blkno;
2432 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2433 struct inode *orphan_dir = NULL;
2434 struct buffer_head *orphan_dir_bh = NULL;
2435 struct ocfs2_alloc_context *inode_ac = NULL;
2436
2437 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2438 if (ret < 0) {
2439 mlog_errno(ret);
2440 return ret;
2441 }
2442
2443 /* reserve an inode spot */
2444 ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2445 if (ret < 0) {
2446 if (ret != -ENOSPC)
2447 mlog_errno(ret);
2448 goto out;
2449 }
2450
2451 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2452 &di_blkno);
2453 if (ret) {
2454 mlog_errno(ret);
2455 goto out;
2456 }
2457
2458 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2459 di_blkno, orphan_name, orphan_insert,
2460 false);
2461 if (ret < 0) {
2462 mlog_errno(ret);
2463 goto out;
2464 }
2465
2466 out:
2467 if (ret == 0) {
2468 *ret_orphan_dir = orphan_dir;
2469 *ret_di_blkno = di_blkno;
2470 *ret_inode_ac = inode_ac;
2471 /*
2472 * orphan_name and orphan_insert are already up to
2473 * date via prepare_orphan_dir
2474 */
2475 } else {
2476 /* Unroll reserve_new_inode* */
2477 if (inode_ac)
2478 ocfs2_free_alloc_context(inode_ac);
2479
2480 /* Unroll orphan dir locking */
2481 inode_unlock(orphan_dir);
2482 ocfs2_inode_unlock(orphan_dir, 1);
2483 iput(orphan_dir);
2484 }
2485
2486 brelse(orphan_dir_bh);
2487
2488 return ret;
2489 }
2490
ocfs2_create_inode_in_orphan(struct inode * dir,int mode,struct inode ** new_inode)2491 int ocfs2_create_inode_in_orphan(struct inode *dir,
2492 int mode,
2493 struct inode **new_inode)
2494 {
2495 int status, did_quota_inode = 0;
2496 struct inode *inode = NULL;
2497 struct inode *orphan_dir = NULL;
2498 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2499 handle_t *handle = NULL;
2500 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2501 struct buffer_head *parent_di_bh = NULL;
2502 struct buffer_head *new_di_bh = NULL;
2503 struct ocfs2_alloc_context *inode_ac = NULL;
2504 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2505 u64 di_blkno, suballoc_loc;
2506 u16 suballoc_bit;
2507
2508 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2509 if (status < 0) {
2510 if (status != -ENOENT)
2511 mlog_errno(status);
2512 return status;
2513 }
2514
2515 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2516 orphan_name, &orphan_dir,
2517 &di_blkno, &orphan_insert, &inode_ac);
2518 if (status < 0) {
2519 if (status != -ENOSPC)
2520 mlog_errno(status);
2521 goto leave;
2522 }
2523
2524 inode = ocfs2_get_init_inode(dir, mode);
2525 if (IS_ERR(inode)) {
2526 status = PTR_ERR(inode);
2527 inode = NULL;
2528 mlog_errno(status);
2529 goto leave;
2530 }
2531
2532 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2533 if (IS_ERR(handle)) {
2534 status = PTR_ERR(handle);
2535 handle = NULL;
2536 mlog_errno(status);
2537 goto leave;
2538 }
2539
2540 status = dquot_alloc_inode(inode);
2541 if (status)
2542 goto leave;
2543 did_quota_inode = 1;
2544
2545 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2546 &suballoc_loc,
2547 &suballoc_bit, di_blkno);
2548 if (status < 0) {
2549 mlog_errno(status);
2550 goto leave;
2551 }
2552
2553 clear_nlink(inode);
2554 /* do the real work now. */
2555 status = __ocfs2_mknod_locked(dir, inode,
2556 0, &new_di_bh, parent_di_bh, handle,
2557 inode_ac, di_blkno, suballoc_loc,
2558 suballoc_bit);
2559 if (status < 0) {
2560 mlog_errno(status);
2561 goto leave;
2562 }
2563
2564 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2565 &orphan_insert, orphan_dir, false);
2566 if (status < 0) {
2567 mlog_errno(status);
2568 goto leave;
2569 }
2570
2571 /* get open lock so that only nodes can't remove it from orphan dir. */
2572 status = ocfs2_open_lock(inode);
2573 if (status < 0)
2574 mlog_errno(status);
2575
2576 insert_inode_hash(inode);
2577 leave:
2578 if (status < 0 && did_quota_inode)
2579 dquot_free_inode(inode);
2580 if (handle)
2581 ocfs2_commit_trans(osb, handle);
2582
2583 if (orphan_dir) {
2584 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2585 ocfs2_inode_unlock(orphan_dir, 1);
2586 inode_unlock(orphan_dir);
2587 iput(orphan_dir);
2588 }
2589
2590 if ((status < 0) && inode) {
2591 clear_nlink(inode);
2592 iput(inode);
2593 }
2594
2595 if (inode_ac)
2596 ocfs2_free_alloc_context(inode_ac);
2597
2598 brelse(new_di_bh);
2599
2600 if (!status)
2601 *new_inode = inode;
2602
2603 ocfs2_free_dir_lookup_result(&orphan_insert);
2604
2605 ocfs2_inode_unlock(dir, 1);
2606 brelse(parent_di_bh);
2607 return status;
2608 }
2609
ocfs2_add_inode_to_orphan(struct ocfs2_super * osb,struct inode * inode)2610 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
2611 struct inode *inode)
2612 {
2613 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2614 struct inode *orphan_dir_inode = NULL;
2615 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2616 struct buffer_head *di_bh = NULL;
2617 int status = 0;
2618 handle_t *handle = NULL;
2619 struct ocfs2_dinode *di = NULL;
2620
2621 status = ocfs2_inode_lock(inode, &di_bh, 1);
2622 if (status < 0) {
2623 mlog_errno(status);
2624 goto bail;
2625 }
2626
2627 di = (struct ocfs2_dinode *) di_bh->b_data;
2628 /*
2629 * Another append dio crashed?
2630 * If so, manually recover it first.
2631 */
2632 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
2633 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode));
2634 if (status < 0) {
2635 if (status != -ENOSPC)
2636 mlog_errno(status);
2637 goto bail_unlock_inode;
2638 }
2639
2640 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0);
2641 if (status < 0) {
2642 mlog_errno(status);
2643 goto bail_unlock_inode;
2644 }
2645 }
2646
2647 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
2648 OCFS2_I(inode)->ip_blkno,
2649 orphan_name,
2650 &orphan_insert,
2651 true);
2652 if (status < 0) {
2653 mlog_errno(status);
2654 goto bail_unlock_inode;
2655 }
2656
2657 handle = ocfs2_start_trans(osb,
2658 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS);
2659 if (IS_ERR(handle)) {
2660 status = PTR_ERR(handle);
2661 goto bail_unlock_orphan;
2662 }
2663
2664 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
2665 &orphan_insert, orphan_dir_inode, true);
2666 if (status)
2667 mlog_errno(status);
2668
2669 ocfs2_commit_trans(osb, handle);
2670
2671 bail_unlock_orphan:
2672 ocfs2_inode_unlock(orphan_dir_inode, 1);
2673 inode_unlock(orphan_dir_inode);
2674 iput(orphan_dir_inode);
2675
2676 ocfs2_free_dir_lookup_result(&orphan_insert);
2677
2678 bail_unlock_inode:
2679 ocfs2_inode_unlock(inode, 1);
2680 brelse(di_bh);
2681
2682 bail:
2683 return status;
2684 }
2685
ocfs2_del_inode_from_orphan(struct ocfs2_super * osb,struct inode * inode,struct buffer_head * di_bh,int update_isize,loff_t end)2686 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
2687 struct inode *inode, struct buffer_head *di_bh,
2688 int update_isize, loff_t end)
2689 {
2690 struct inode *orphan_dir_inode = NULL;
2691 struct buffer_head *orphan_dir_bh = NULL;
2692 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2693 handle_t *handle = NULL;
2694 int status = 0;
2695
2696 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2697 ORPHAN_DIR_SYSTEM_INODE,
2698 le16_to_cpu(di->i_dio_orphaned_slot));
2699 if (!orphan_dir_inode) {
2700 status = -ENOENT;
2701 mlog_errno(status);
2702 goto bail;
2703 }
2704
2705 inode_lock(orphan_dir_inode);
2706 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2707 if (status < 0) {
2708 inode_unlock(orphan_dir_inode);
2709 iput(orphan_dir_inode);
2710 mlog_errno(status);
2711 goto bail;
2712 }
2713
2714 handle = ocfs2_start_trans(osb,
2715 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS);
2716 if (IS_ERR(handle)) {
2717 status = PTR_ERR(handle);
2718 goto bail_unlock_orphan;
2719 }
2720
2721 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)));
2722
2723 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
2724 inode, orphan_dir_bh, true);
2725 if (status < 0) {
2726 mlog_errno(status);
2727 goto bail_commit;
2728 }
2729
2730 status = ocfs2_journal_access_di(handle,
2731 INODE_CACHE(inode),
2732 di_bh,
2733 OCFS2_JOURNAL_ACCESS_WRITE);
2734 if (status < 0) {
2735 mlog_errno(status);
2736 goto bail_commit;
2737 }
2738
2739 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2740 di->i_dio_orphaned_slot = 0;
2741
2742 if (update_isize) {
2743 status = ocfs2_set_inode_size(handle, inode, di_bh, end);
2744 if (status)
2745 mlog_errno(status);
2746 } else
2747 ocfs2_journal_dirty(handle, di_bh);
2748
2749 bail_commit:
2750 ocfs2_commit_trans(osb, handle);
2751
2752 bail_unlock_orphan:
2753 ocfs2_inode_unlock(orphan_dir_inode, 1);
2754 inode_unlock(orphan_dir_inode);
2755 brelse(orphan_dir_bh);
2756 iput(orphan_dir_inode);
2757
2758 bail:
2759 return status;
2760 }
2761
ocfs2_mv_orphaned_inode_to_new(struct inode * dir,struct inode * inode,struct dentry * dentry)2762 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2763 struct inode *inode,
2764 struct dentry *dentry)
2765 {
2766 int status = 0;
2767 struct buffer_head *parent_di_bh = NULL;
2768 handle_t *handle = NULL;
2769 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2770 struct ocfs2_dinode *dir_di, *di;
2771 struct inode *orphan_dir_inode = NULL;
2772 struct buffer_head *orphan_dir_bh = NULL;
2773 struct buffer_head *di_bh = NULL;
2774 struct ocfs2_dir_lookup_result lookup = { NULL, };
2775
2776 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2777 dentry->d_name.len, dentry->d_name.name,
2778 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2779 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2780
2781 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2782 if (status < 0) {
2783 if (status != -ENOENT)
2784 mlog_errno(status);
2785 return status;
2786 }
2787
2788 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2789 if (!dir_di->i_links_count) {
2790 /* can't make a file in a deleted directory. */
2791 status = -ENOENT;
2792 goto leave;
2793 }
2794
2795 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2796 dentry->d_name.len);
2797 if (status)
2798 goto leave;
2799
2800 /* get a spot inside the dir. */
2801 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2802 dentry->d_name.name,
2803 dentry->d_name.len, &lookup);
2804 if (status < 0) {
2805 mlog_errno(status);
2806 goto leave;
2807 }
2808
2809 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2810 ORPHAN_DIR_SYSTEM_INODE,
2811 osb->slot_num);
2812 if (!orphan_dir_inode) {
2813 status = -ENOENT;
2814 mlog_errno(status);
2815 goto leave;
2816 }
2817
2818 inode_lock(orphan_dir_inode);
2819
2820 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2821 if (status < 0) {
2822 mlog_errno(status);
2823 inode_unlock(orphan_dir_inode);
2824 iput(orphan_dir_inode);
2825 goto leave;
2826 }
2827
2828 status = ocfs2_read_inode_block(inode, &di_bh);
2829 if (status < 0) {
2830 mlog_errno(status);
2831 goto orphan_unlock;
2832 }
2833
2834 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2835 if (IS_ERR(handle)) {
2836 status = PTR_ERR(handle);
2837 handle = NULL;
2838 mlog_errno(status);
2839 goto orphan_unlock;
2840 }
2841
2842 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2843 di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2844 if (status < 0) {
2845 mlog_errno(status);
2846 goto out_commit;
2847 }
2848
2849 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2850 orphan_dir_bh, false);
2851 if (status < 0) {
2852 mlog_errno(status);
2853 goto out_commit;
2854 }
2855
2856 di = (struct ocfs2_dinode *)di_bh->b_data;
2857 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2858 di->i_orphaned_slot = 0;
2859 set_nlink(inode, 1);
2860 ocfs2_set_links_count(di, inode->i_nlink);
2861 ocfs2_update_inode_fsync_trans(handle, inode, 1);
2862 ocfs2_journal_dirty(handle, di_bh);
2863
2864 status = ocfs2_add_entry(handle, dentry, inode,
2865 OCFS2_I(inode)->ip_blkno, parent_di_bh,
2866 &lookup);
2867 if (status < 0) {
2868 mlog_errno(status);
2869 goto out_commit;
2870 }
2871
2872 status = ocfs2_dentry_attach_lock(dentry, inode,
2873 OCFS2_I(dir)->ip_blkno);
2874 if (status) {
2875 mlog_errno(status);
2876 goto out_commit;
2877 }
2878
2879 d_instantiate(dentry, inode);
2880 status = 0;
2881 out_commit:
2882 ocfs2_commit_trans(osb, handle);
2883 orphan_unlock:
2884 ocfs2_inode_unlock(orphan_dir_inode, 1);
2885 inode_unlock(orphan_dir_inode);
2886 iput(orphan_dir_inode);
2887 leave:
2888
2889 ocfs2_inode_unlock(dir, 1);
2890
2891 brelse(di_bh);
2892 brelse(parent_di_bh);
2893 brelse(orphan_dir_bh);
2894
2895 ocfs2_free_dir_lookup_result(&lookup);
2896
2897 if (status)
2898 mlog_errno(status);
2899
2900 return status;
2901 }
2902
2903 const struct inode_operations ocfs2_dir_iops = {
2904 .create = ocfs2_create,
2905 .lookup = ocfs2_lookup,
2906 .link = ocfs2_link,
2907 .unlink = ocfs2_unlink,
2908 .rmdir = ocfs2_unlink,
2909 .symlink = ocfs2_symlink,
2910 .mkdir = ocfs2_mkdir,
2911 .mknod = ocfs2_mknod,
2912 .rename = ocfs2_rename,
2913 .setattr = ocfs2_setattr,
2914 .getattr = ocfs2_getattr,
2915 .permission = ocfs2_permission,
2916 .listxattr = ocfs2_listxattr,
2917 .fiemap = ocfs2_fiemap,
2918 .get_acl = ocfs2_iop_get_acl,
2919 .set_acl = ocfs2_iop_set_acl,
2920 .fileattr_get = ocfs2_fileattr_get,
2921 .fileattr_set = ocfs2_fileattr_set,
2922 };
2923