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drm/i915: kill mappable/fenceable disdinction
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / ocfs2 / namei.c
blobff5744e1e36fcb9200158eb419abc3ebdf33ec5b
1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * namei.c
5 *
6 * Create and rename file, directory, symlinks
7 *
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
9 *
10 * Portions of this code from linux/fs/ext3/dir.c
11 *
12 * Copyright (C) 1992, 1993, 1994, 1995
13 * Remy Card (card@masi.ibp.fr)
14 * Laboratoire MASI - Institut Blaise pascal
15 * Universite Pierre et Marie Curie (Paris VI)
16 *
17 * from
18 *
19 * linux/fs/minix/dir.c
20 *
21 * Copyright (C) 1991, 1992 Linux Torvalds
22 *
23 * This program is free software; you can redistribute it and/or
24 * modify it under the terms of the GNU General Public
25 * License as published by the Free Software Foundation; either
26 * version 2 of the License, or (at your option) any later version.
27 *
28 * This program is distributed in the hope that it will be useful,
29 * but WITHOUT ANY WARRANTY; without even the implied warranty of
30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
31 * General Public License for more details.
32 *
33 * You should have received a copy of the GNU General Public
34 * License along with this program; if not, write to the
35 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
36 * Boston, MA 021110-1307, USA.
37 */
38
39 #include <linux/fs.h>
40 #include <linux/types.h>
41 #include <linux/slab.h>
42 #include <linux/highmem.h>
43 #include <linux/quotaops.h>
44
45 #define MLOG_MASK_PREFIX ML_NAMEI
46 #include <cluster/masklog.h>
47
48 #include "ocfs2.h"
49
50 #include "alloc.h"
51 #include "dcache.h"
52 #include "dir.h"
53 #include "dlmglue.h"
54 #include "extent_map.h"
55 #include "file.h"
56 #include "inode.h"
57 #include "journal.h"
58 #include "namei.h"
59 #include "suballoc.h"
60 #include "super.h"
61 #include "symlink.h"
62 #include "sysfile.h"
63 #include "uptodate.h"
64 #include "xattr.h"
65 #include "acl.h"
66
67 #include "buffer_head_io.h"
68
69 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
70 struct inode *dir,
71 struct inode *inode,
72 dev_t dev,
73 struct buffer_head **new_fe_bh,
74 struct buffer_head *parent_fe_bh,
75 handle_t *handle,
76 struct ocfs2_alloc_context *inode_ac);
77
78 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
79 struct inode **ret_orphan_dir,
80 u64 blkno,
81 char *name,
82 struct ocfs2_dir_lookup_result *lookup);
83
84 static int ocfs2_orphan_add(struct ocfs2_super *osb,
85 handle_t *handle,
86 struct inode *inode,
87 struct buffer_head *fe_bh,
88 char *name,
89 struct ocfs2_dir_lookup_result *lookup,
90 struct inode *orphan_dir_inode);
91
92 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
93 handle_t *handle,
94 struct inode *inode,
95 const char *symname);
96
97 /* An orphan dir name is an 8 byte value, printed as a hex string */
98 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
99
100 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
101 struct nameidata *nd)
102 {
103 int status;
104 u64 blkno;
105 struct inode *inode = NULL;
106 struct dentry *ret;
107 struct ocfs2_inode_info *oi;
108
109 mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
110 dentry->d_name.len, dentry->d_name.name);
111
112 if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
113 ret = ERR_PTR(-ENAMETOOLONG);
114 goto bail;
115 }
116
117 mlog(0, "find name %.*s in directory %llu\n", dentry->d_name.len,
118 dentry->d_name.name, (unsigned long long)OCFS2_I(dir)->ip_blkno);
119
120 status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
121 if (status < 0) {
122 if (status != -ENOENT)
123 mlog_errno(status);
124 ret = ERR_PTR(status);
125 goto bail;
126 }
127
128 status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
129 dentry->d_name.len, &blkno);
130 if (status < 0)
131 goto bail_add;
132
133 inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
134 if (IS_ERR(inode)) {
135 ret = ERR_PTR(-EACCES);
136 goto bail_unlock;
137 }
138
139 oi = OCFS2_I(inode);
140 /* Clear any orphaned state... If we were able to look up the
141 * inode from a directory, it certainly can't be orphaned. We
142 * might have the bad state from a node which intended to
143 * orphan this inode but crashed before it could commit the
144 * unlink. */
145 spin_lock(&oi->ip_lock);
146 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
147 spin_unlock(&oi->ip_lock);
148
149 bail_add:
150 dentry->d_op = &ocfs2_dentry_ops;
151 ret = d_splice_alias(inode, dentry);
152
153 if (inode) {
154 /*
155 * If d_splice_alias() finds a DCACHE_DISCONNECTED
156 * dentry, it will d_move() it on top of ourse. The
157 * return value will indicate this however, so in
158 * those cases, we switch them around for the locking
159 * code.
160 *
161 * NOTE: This dentry already has ->d_op set from
162 * ocfs2_get_parent() and ocfs2_get_dentry()
163 */
164 if (ret)
165 dentry = ret;
166
167 status = ocfs2_dentry_attach_lock(dentry, inode,
168 OCFS2_I(dir)->ip_blkno);
169 if (status) {
170 mlog_errno(status);
171 ret = ERR_PTR(status);
172 goto bail_unlock;
173 }
174 } else
175 ocfs2_dentry_attach_gen(dentry);
176
177 bail_unlock:
178 /* Don't drop the cluster lock until *after* the d_add --
179 * unlink on another node will message us to remove that
180 * dentry under this lock so otherwise we can race this with
181 * the downconvert thread and have a stale dentry. */
182 ocfs2_inode_unlock(dir, 0);
183
184 bail:
185
186 mlog_exit_ptr(ret);
187
188 return ret;
189 }
190
191 static struct inode *ocfs2_get_init_inode(struct inode *dir, int mode)
192 {
193 struct inode *inode;
194
195 inode = new_inode(dir->i_sb);
196 if (!inode) {
197 mlog(ML_ERROR, "new_inode failed!\n");
198 return NULL;
199 }
200
201 /* populate as many fields early on as possible - many of
202 * these are used by the support functions here and in
203 * callers. */
204 if (S_ISDIR(mode))
205 inode->i_nlink = 2;
206 else
207 inode->i_nlink = 1;
208 inode_init_owner(inode, dir, mode);
209 dquot_initialize(inode);
210 return inode;
211 }
212
213 static int ocfs2_mknod(struct inode *dir,
214 struct dentry *dentry,
215 int mode,
216 dev_t dev)
217 {
218 int status = 0;
219 struct buffer_head *parent_fe_bh = NULL;
220 handle_t *handle = NULL;
221 struct ocfs2_super *osb;
222 struct ocfs2_dinode *dirfe;
223 struct buffer_head *new_fe_bh = NULL;
224 struct inode *inode = NULL;
225 struct ocfs2_alloc_context *inode_ac = NULL;
226 struct ocfs2_alloc_context *data_ac = NULL;
227 struct ocfs2_alloc_context *meta_ac = NULL;
228 int want_clusters = 0;
229 int want_meta = 0;
230 int xattr_credits = 0;
231 struct ocfs2_security_xattr_info si = {
232 .enable = 1,
233 };
234 int did_quota_inode = 0;
235 struct ocfs2_dir_lookup_result lookup = { NULL, };
236 sigset_t oldset;
237 int did_block_signals = 0;
238
239 mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode,
240 (unsigned long)dev, dentry->d_name.len,
241 dentry->d_name.name);
242
243 dquot_initialize(dir);
244
245 /* get our super block */
246 osb = OCFS2_SB(dir->i_sb);
247
248 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
249 if (status < 0) {
250 if (status != -ENOENT)
251 mlog_errno(status);
252 return status;
253 }
254
255 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
256 status = -EMLINK;
257 goto leave;
258 }
259
260 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
261 if (!ocfs2_read_links_count(dirfe)) {
262 /* can't make a file in a deleted directory. */
263 status = -ENOENT;
264 goto leave;
265 }
266
267 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
268 dentry->d_name.len);
269 if (status)
270 goto leave;
271
272 /* get a spot inside the dir. */
273 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
274 dentry->d_name.name,
275 dentry->d_name.len, &lookup);
276 if (status < 0) {
277 mlog_errno(status);
278 goto leave;
279 }
280
281 /* reserve an inode spot */
282 status = ocfs2_reserve_new_inode(osb, &inode_ac);
283 if (status < 0) {
284 if (status != -ENOSPC)
285 mlog_errno(status);
286 goto leave;
287 }
288
289 inode = ocfs2_get_init_inode(dir, mode);
290 if (!inode) {
291 status = -ENOMEM;
292 mlog_errno(status);
293 goto leave;
294 }
295
296 /* get security xattr */
297 status = ocfs2_init_security_get(inode, dir, &si);
298 if (status) {
299 if (status == -EOPNOTSUPP)
300 si.enable = 0;
301 else {
302 mlog_errno(status);
303 goto leave;
304 }
305 }
306
307 /* calculate meta data/clusters for setting security and acl xattr */
308 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
309 &si, &want_clusters,
310 &xattr_credits, &want_meta);
311 if (status < 0) {
312 mlog_errno(status);
313 goto leave;
314 }
315
316 /* Reserve a cluster if creating an extent based directory. */
317 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
318 want_clusters += 1;
319
320 /* Dir indexing requires extra space as well */
321 if (ocfs2_supports_indexed_dirs(osb))
322 want_meta++;
323 }
324
325 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
326 if (status < 0) {
327 if (status != -ENOSPC)
328 mlog_errno(status);
329 goto leave;
330 }
331
332 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
333 if (status < 0) {
334 if (status != -ENOSPC)
335 mlog_errno(status);
336 goto leave;
337 }
338
339 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
340 S_ISDIR(mode),
341 xattr_credits));
342 if (IS_ERR(handle)) {
343 status = PTR_ERR(handle);
344 handle = NULL;
345 mlog_errno(status);
346 goto leave;
347 }
348
349 /* Starting to change things, restart is no longer possible. */
350 ocfs2_block_signals(&oldset);
351 did_block_signals = 1;
352
353 status = dquot_alloc_inode(inode);
354 if (status)
355 goto leave;
356 did_quota_inode = 1;
357
358 mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry,
359 inode->i_mode, (unsigned long)dev, dentry->d_name.len,
360 dentry->d_name.name);
361
362 /* do the real work now. */
363 status = ocfs2_mknod_locked(osb, dir, inode, dev,
364 &new_fe_bh, parent_fe_bh, handle,
365 inode_ac);
366 if (status < 0) {
367 mlog_errno(status);
368 goto leave;
369 }
370
371 if (S_ISDIR(mode)) {
372 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
373 new_fe_bh, data_ac, meta_ac);
374 if (status < 0) {
375 mlog_errno(status);
376 goto leave;
377 }
378
379 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
380 parent_fe_bh,
381 OCFS2_JOURNAL_ACCESS_WRITE);
382 if (status < 0) {
383 mlog_errno(status);
384 goto leave;
385 }
386 ocfs2_add_links_count(dirfe, 1);
387 ocfs2_journal_dirty(handle, parent_fe_bh);
388 inc_nlink(dir);
389 }
390
391 status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
392 meta_ac, data_ac);
393 if (status < 0) {
394 mlog_errno(status);
395 goto leave;
396 }
397
398 if (si.enable) {
399 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
400 meta_ac, data_ac);
401 if (status < 0) {
402 mlog_errno(status);
403 goto leave;
404 }
405 }
406
407 /*
408 * Do this before adding the entry to the directory. We add
409 * also set d_op after success so that ->d_iput() will cleanup
410 * the dentry lock even if ocfs2_add_entry() fails below.
411 */
412 status = ocfs2_dentry_attach_lock(dentry, inode,
413 OCFS2_I(dir)->ip_blkno);
414 if (status) {
415 mlog_errno(status);
416 goto leave;
417 }
418 dentry->d_op = &ocfs2_dentry_ops;
419
420 status = ocfs2_add_entry(handle, dentry, inode,
421 OCFS2_I(inode)->ip_blkno, parent_fe_bh,
422 &lookup);
423 if (status < 0) {
424 mlog_errno(status);
425 goto leave;
426 }
427
428 insert_inode_hash(inode);
429 d_instantiate(dentry, inode);
430 status = 0;
431 leave:
432 if (status < 0 && did_quota_inode)
433 dquot_free_inode(inode);
434 if (handle)
435 ocfs2_commit_trans(osb, handle);
436
437 ocfs2_inode_unlock(dir, 1);
438 if (did_block_signals)
439 ocfs2_unblock_signals(&oldset);
440
441 if (status == -ENOSPC)
442 mlog(0, "Disk is full\n");
443
444 brelse(new_fe_bh);
445 brelse(parent_fe_bh);
446 kfree(si.name);
447 kfree(si.value);
448
449 ocfs2_free_dir_lookup_result(&lookup);
450
451 if (inode_ac)
452 ocfs2_free_alloc_context(inode_ac);
453
454 if (data_ac)
455 ocfs2_free_alloc_context(data_ac);
456
457 if (meta_ac)
458 ocfs2_free_alloc_context(meta_ac);
459
460 /*
461 * We should call iput after the i_mutex of the bitmap been
462 * unlocked in ocfs2_free_alloc_context, or the
463 * ocfs2_delete_inode will mutex_lock again.
464 */
465 if ((status < 0) && inode) {
466 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
467 clear_nlink(inode);
468 iput(inode);
469 }
470
471 mlog_exit(status);
472
473 return status;
474 }
475
476 static int __ocfs2_mknod_locked(struct inode *dir,
477 struct inode *inode,
478 dev_t dev,
479 struct buffer_head **new_fe_bh,
480 struct buffer_head *parent_fe_bh,
481 handle_t *handle,
482 struct ocfs2_alloc_context *inode_ac,
483 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
484 {
485 int status = 0;
486 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
487 struct ocfs2_dinode *fe = NULL;
488 struct ocfs2_extent_list *fel;
489 u16 feat;
490
491 *new_fe_bh = NULL;
492
493 /* populate as many fields early on as possible - many of
494 * these are used by the support functions here and in
495 * callers. */
496 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
497 OCFS2_I(inode)->ip_blkno = fe_blkno;
498 spin_lock(&osb->osb_lock);
499 inode->i_generation = osb->s_next_generation++;
500 spin_unlock(&osb->osb_lock);
501
502 *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
503 if (!*new_fe_bh) {
504 status = -EIO;
505 mlog_errno(status);
506 goto leave;
507 }
508 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
509
510 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
511 *new_fe_bh,
512 OCFS2_JOURNAL_ACCESS_CREATE);
513 if (status < 0) {
514 mlog_errno(status);
515 goto leave;
516 }
517
518 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
519 memset(fe, 0, osb->sb->s_blocksize);
520
521 fe->i_generation = cpu_to_le32(inode->i_generation);
522 fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
523 fe->i_blkno = cpu_to_le64(fe_blkno);
524 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
525 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
526 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
527 fe->i_uid = cpu_to_le32(inode->i_uid);
528 fe->i_gid = cpu_to_le32(inode->i_gid);
529 fe->i_mode = cpu_to_le16(inode->i_mode);
530 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
531 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
532
533 ocfs2_set_links_count(fe, inode->i_nlink);
534
535 fe->i_last_eb_blk = 0;
536 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
537 le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL);
538 fe->i_atime = fe->i_ctime = fe->i_mtime =
539 cpu_to_le64(CURRENT_TIME.tv_sec);
540 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
541 cpu_to_le32(CURRENT_TIME.tv_nsec);
542 fe->i_dtime = 0;
543
544 /*
545 * If supported, directories start with inline data. If inline
546 * isn't supported, but indexing is, we start them as indexed.
547 */
548 feat = le16_to_cpu(fe->i_dyn_features);
549 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
550 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
551
552 fe->id2.i_data.id_count = cpu_to_le16(
553 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
554 } else {
555 fel = &fe->id2.i_list;
556 fel->l_tree_depth = 0;
557 fel->l_next_free_rec = 0;
558 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
559 }
560
561 ocfs2_journal_dirty(handle, *new_fe_bh);
562
563 ocfs2_populate_inode(inode, fe, 1);
564 ocfs2_ci_set_new(osb, INODE_CACHE(inode));
565 if (!ocfs2_mount_local(osb)) {
566 status = ocfs2_create_new_inode_locks(inode);
567 if (status < 0)
568 mlog_errno(status);
569 }
570
571 status = 0; /* error in ocfs2_create_new_inode_locks is not
572 * critical */
573
574 leave:
575 if (status < 0) {
576 if (*new_fe_bh) {
577 brelse(*new_fe_bh);
578 *new_fe_bh = NULL;
579 }
580 }
581
582 mlog_exit(status);
583 return status;
584 }
585
586 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
587 struct inode *dir,
588 struct inode *inode,
589 dev_t dev,
590 struct buffer_head **new_fe_bh,
591 struct buffer_head *parent_fe_bh,
592 handle_t *handle,
593 struct ocfs2_alloc_context *inode_ac)
594 {
595 int status = 0;
596 u64 suballoc_loc, fe_blkno = 0;
597 u16 suballoc_bit;
598
599 *new_fe_bh = NULL;
600
601 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
602 inode_ac, &suballoc_loc,
603 &suballoc_bit, &fe_blkno);
604 if (status < 0) {
605 mlog_errno(status);
606 return status;
607 }
608
609 return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
610 parent_fe_bh, handle, inode_ac,
611 fe_blkno, suballoc_loc, suballoc_bit);
612 }
613
614 static int ocfs2_mkdir(struct inode *dir,
615 struct dentry *dentry,
616 int mode)
617 {
618 int ret;
619
620 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
621 dentry->d_name.len, dentry->d_name.name);
622 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
623 mlog_exit(ret);
624
625 return ret;
626 }
627
628 static int ocfs2_create(struct inode *dir,
629 struct dentry *dentry,
630 int mode,
631 struct nameidata *nd)
632 {
633 int ret;
634
635 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
636 dentry->d_name.len, dentry->d_name.name);
637 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
638 mlog_exit(ret);
639
640 return ret;
641 }
642
643 static int ocfs2_link(struct dentry *old_dentry,
644 struct inode *dir,
645 struct dentry *dentry)
646 {
647 handle_t *handle;
648 struct inode *inode = old_dentry->d_inode;
649 int err;
650 struct buffer_head *fe_bh = NULL;
651 struct buffer_head *parent_fe_bh = NULL;
652 struct ocfs2_dinode *fe = NULL;
653 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
654 struct ocfs2_dir_lookup_result lookup = { NULL, };
655 sigset_t oldset;
656
657 mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino,
658 old_dentry->d_name.len, old_dentry->d_name.name,
659 dentry->d_name.len, dentry->d_name.name);
660
661 if (S_ISDIR(inode->i_mode))
662 return -EPERM;
663
664 dquot_initialize(dir);
665
666 err = ocfs2_inode_lock_nested(dir, &parent_fe_bh, 1, OI_LS_PARENT);
667 if (err < 0) {
668 if (err != -ENOENT)
669 mlog_errno(err);
670 return err;
671 }
672
673 if (!dir->i_nlink) {
674 err = -ENOENT;
675 goto out;
676 }
677
678 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
679 dentry->d_name.len);
680 if (err)
681 goto out;
682
683 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
684 dentry->d_name.name,
685 dentry->d_name.len, &lookup);
686 if (err < 0) {
687 mlog_errno(err);
688 goto out;
689 }
690
691 err = ocfs2_inode_lock(inode, &fe_bh, 1);
692 if (err < 0) {
693 if (err != -ENOENT)
694 mlog_errno(err);
695 goto out;
696 }
697
698 fe = (struct ocfs2_dinode *) fe_bh->b_data;
699 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
700 err = -EMLINK;
701 goto out_unlock_inode;
702 }
703
704 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
705 if (IS_ERR(handle)) {
706 err = PTR_ERR(handle);
707 handle = NULL;
708 mlog_errno(err);
709 goto out_unlock_inode;
710 }
711
712 /* Starting to change things, restart is no longer possible. */
713 ocfs2_block_signals(&oldset);
714
715 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
716 OCFS2_JOURNAL_ACCESS_WRITE);
717 if (err < 0) {
718 mlog_errno(err);
719 goto out_commit;
720 }
721
722 inc_nlink(inode);
723 inode->i_ctime = CURRENT_TIME;
724 ocfs2_set_links_count(fe, inode->i_nlink);
725 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
726 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
727 ocfs2_journal_dirty(handle, fe_bh);
728
729 err = ocfs2_add_entry(handle, dentry, inode,
730 OCFS2_I(inode)->ip_blkno,
731 parent_fe_bh, &lookup);
732 if (err) {
733 ocfs2_add_links_count(fe, -1);
734 drop_nlink(inode);
735 mlog_errno(err);
736 goto out_commit;
737 }
738
739 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
740 if (err) {
741 mlog_errno(err);
742 goto out_commit;
743 }
744
745 ihold(inode);
746 dentry->d_op = &ocfs2_dentry_ops;
747 d_instantiate(dentry, inode);
748
749 out_commit:
750 ocfs2_commit_trans(osb, handle);
751 ocfs2_unblock_signals(&oldset);
752 out_unlock_inode:
753 ocfs2_inode_unlock(inode, 1);
754
755 out:
756 ocfs2_inode_unlock(dir, 1);
757
758 brelse(fe_bh);
759 brelse(parent_fe_bh);
760
761 ocfs2_free_dir_lookup_result(&lookup);
762
763 mlog_exit(err);
764
765 return err;
766 }
767
768 /*
769 * Takes and drops an exclusive lock on the given dentry. This will
770 * force other nodes to drop it.
771 */
772 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
773 {
774 int ret;
775
776 ret = ocfs2_dentry_lock(dentry, 1);
777 if (ret)
778 mlog_errno(ret);
779 else
780 ocfs2_dentry_unlock(dentry, 1);
781
782 return ret;
783 }
784
785 static inline int inode_is_unlinkable(struct inode *inode)
786 {
787 if (S_ISDIR(inode->i_mode)) {
788 if (inode->i_nlink == 2)
789 return 1;
790 return 0;
791 }
792
793 if (inode->i_nlink == 1)
794 return 1;
795 return 0;
796 }
797
798 static int ocfs2_unlink(struct inode *dir,
799 struct dentry *dentry)
800 {
801 int status;
802 int child_locked = 0;
803 struct inode *inode = dentry->d_inode;
804 struct inode *orphan_dir = NULL;
805 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
806 u64 blkno;
807 struct ocfs2_dinode *fe = NULL;
808 struct buffer_head *fe_bh = NULL;
809 struct buffer_head *parent_node_bh = NULL;
810 handle_t *handle = NULL;
811 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
812 struct ocfs2_dir_lookup_result lookup = { NULL, };
813 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
814
815 mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
816 dentry->d_name.len, dentry->d_name.name);
817
818 dquot_initialize(dir);
819
820 BUG_ON(dentry->d_parent->d_inode != dir);
821
822 mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno);
823
824 if (inode == osb->root_inode) {
825 mlog(0, "Cannot delete the root directory\n");
826 return -EPERM;
827 }
828
829 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
830 OI_LS_PARENT);
831 if (status < 0) {
832 if (status != -ENOENT)
833 mlog_errno(status);
834 return status;
835 }
836
837 status = ocfs2_find_files_on_disk(dentry->d_name.name,
838 dentry->d_name.len, &blkno, dir,
839 &lookup);
840 if (status < 0) {
841 if (status != -ENOENT)
842 mlog_errno(status);
843 goto leave;
844 }
845
846 if (OCFS2_I(inode)->ip_blkno != blkno) {
847 status = -ENOENT;
848
849 mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n",
850 (unsigned long long)OCFS2_I(inode)->ip_blkno,
851 (unsigned long long)blkno, OCFS2_I(inode)->ip_flags);
852 goto leave;
853 }
854
855 status = ocfs2_inode_lock(inode, &fe_bh, 1);
856 if (status < 0) {
857 if (status != -ENOENT)
858 mlog_errno(status);
859 goto leave;
860 }
861 child_locked = 1;
862
863 if (S_ISDIR(inode->i_mode)) {
864 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
865 status = -ENOTEMPTY;
866 goto leave;
867 }
868 }
869
870 status = ocfs2_remote_dentry_delete(dentry);
871 if (status < 0) {
872 /* This remote delete should succeed under all normal
873 * circumstances. */
874 mlog_errno(status);
875 goto leave;
876 }
877
878 if (inode_is_unlinkable(inode)) {
879 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
880 OCFS2_I(inode)->ip_blkno,
881 orphan_name, &orphan_insert);
882 if (status < 0) {
883 mlog_errno(status);
884 goto leave;
885 }
886 }
887
888 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
889 if (IS_ERR(handle)) {
890 status = PTR_ERR(handle);
891 handle = NULL;
892 mlog_errno(status);
893 goto leave;
894 }
895
896 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
897 OCFS2_JOURNAL_ACCESS_WRITE);
898 if (status < 0) {
899 mlog_errno(status);
900 goto leave;
901 }
902
903 fe = (struct ocfs2_dinode *) fe_bh->b_data;
904
905 if (inode_is_unlinkable(inode)) {
906 status = ocfs2_orphan_add(osb, handle, inode, fe_bh, orphan_name,
907 &orphan_insert, orphan_dir);
908 if (status < 0) {
909 mlog_errno(status);
910 goto leave;
911 }
912 }
913
914 /* delete the name from the parent dir */
915 status = ocfs2_delete_entry(handle, dir, &lookup);
916 if (status < 0) {
917 mlog_errno(status);
918 goto leave;
919 }
920
921 if (S_ISDIR(inode->i_mode))
922 drop_nlink(inode);
923 drop_nlink(inode);
924 ocfs2_set_links_count(fe, inode->i_nlink);
925 ocfs2_journal_dirty(handle, fe_bh);
926
927 dir->i_ctime = dir->i_mtime = CURRENT_TIME;
928 if (S_ISDIR(inode->i_mode))
929 drop_nlink(dir);
930
931 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
932 if (status < 0) {
933 mlog_errno(status);
934 if (S_ISDIR(inode->i_mode))
935 inc_nlink(dir);
936 }
937
938 leave:
939 if (handle)
940 ocfs2_commit_trans(osb, handle);
941
942 if (child_locked)
943 ocfs2_inode_unlock(inode, 1);
944
945 ocfs2_inode_unlock(dir, 1);
946
947 if (orphan_dir) {
948 /* This was locked for us in ocfs2_prepare_orphan_dir() */
949 ocfs2_inode_unlock(orphan_dir, 1);
950 mutex_unlock(&orphan_dir->i_mutex);
951 iput(orphan_dir);
952 }
953
954 brelse(fe_bh);
955 brelse(parent_node_bh);
956
957 ocfs2_free_dir_lookup_result(&orphan_insert);
958 ocfs2_free_dir_lookup_result(&lookup);
959
960 mlog_exit(status);
961
962 return status;
963 }
964
965 /*
966 * The only place this should be used is rename!
967 * if they have the same id, then the 1st one is the only one locked.
968 */
969 static int ocfs2_double_lock(struct ocfs2_super *osb,
970 struct buffer_head **bh1,
971 struct inode *inode1,
972 struct buffer_head **bh2,
973 struct inode *inode2)
974 {
975 int status;
976 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
977 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
978 struct buffer_head **tmpbh;
979 struct inode *tmpinode;
980
981 mlog_entry("(inode1 = %llu, inode2 = %llu)\n",
982 (unsigned long long)oi1->ip_blkno,
983 (unsigned long long)oi2->ip_blkno);
984
985 if (*bh1)
986 *bh1 = NULL;
987 if (*bh2)
988 *bh2 = NULL;
989
990 /* we always want to lock the one with the lower lockid first. */
991 if (oi1->ip_blkno != oi2->ip_blkno) {
992 if (oi1->ip_blkno < oi2->ip_blkno) {
993 /* switch id1 and id2 around */
994 mlog(0, "switching them around...\n");
995 tmpbh = bh2;
996 bh2 = bh1;
997 bh1 = tmpbh;
998
999 tmpinode = inode2;
1000 inode2 = inode1;
1001 inode1 = tmpinode;
1002 }
1003 /* lock id2 */
1004 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1005 OI_LS_RENAME1);
1006 if (status < 0) {
1007 if (status != -ENOENT)
1008 mlog_errno(status);
1009 goto bail;
1010 }
1011 }
1012
1013 /* lock id1 */
1014 status = ocfs2_inode_lock_nested(inode1, bh1, 1, OI_LS_RENAME2);
1015 if (status < 0) {
1016 /*
1017 * An error return must mean that no cluster locks
1018 * were held on function exit.
1019 */
1020 if (oi1->ip_blkno != oi2->ip_blkno)
1021 ocfs2_inode_unlock(inode2, 1);
1022
1023 if (status != -ENOENT)
1024 mlog_errno(status);
1025 }
1026
1027 bail:
1028 mlog_exit(status);
1029 return status;
1030 }
1031
1032 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1033 {
1034 ocfs2_inode_unlock(inode1, 1);
1035
1036 if (inode1 != inode2)
1037 ocfs2_inode_unlock(inode2, 1);
1038 }
1039
1040 static int ocfs2_rename(struct inode *old_dir,
1041 struct dentry *old_dentry,
1042 struct inode *new_dir,
1043 struct dentry *new_dentry)
1044 {
1045 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1046 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1047 struct inode *old_inode = old_dentry->d_inode;
1048 struct inode *new_inode = new_dentry->d_inode;
1049 struct inode *orphan_dir = NULL;
1050 struct ocfs2_dinode *newfe = NULL;
1051 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1052 struct buffer_head *newfe_bh = NULL;
1053 struct buffer_head *old_inode_bh = NULL;
1054 struct ocfs2_super *osb = NULL;
1055 u64 newfe_blkno, old_de_ino;
1056 handle_t *handle = NULL;
1057 struct buffer_head *old_dir_bh = NULL;
1058 struct buffer_head *new_dir_bh = NULL;
1059 nlink_t old_dir_nlink = old_dir->i_nlink;
1060 struct ocfs2_dinode *old_di;
1061 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1062 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1063 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1064 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1065 struct ocfs2_dir_lookup_result target_insert = { NULL, };
1066
1067 /* At some point it might be nice to break this function up a
1068 * bit. */
1069
1070 mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n",
1071 old_dir, old_dentry, new_dir, new_dentry,
1072 old_dentry->d_name.len, old_dentry->d_name.name,
1073 new_dentry->d_name.len, new_dentry->d_name.name);
1074
1075 dquot_initialize(old_dir);
1076 dquot_initialize(new_dir);
1077
1078 osb = OCFS2_SB(old_dir->i_sb);
1079
1080 if (new_inode) {
1081 if (!igrab(new_inode))
1082 BUG();
1083 }
1084
1085 /* Assume a directory hierarchy thusly:
1086 * a/b/c
1087 * a/d
1088 * a,b,c, and d are all directories.
1089 *
1090 * from cwd of 'a' on both nodes:
1091 * node1: mv b/c d
1092 * node2: mv d b/c
1093 *
1094 * And that's why, just like the VFS, we need a file system
1095 * rename lock. */
1096 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1097 status = ocfs2_rename_lock(osb);
1098 if (status < 0) {
1099 mlog_errno(status);
1100 goto bail;
1101 }
1102 rename_lock = 1;
1103 }
1104
1105 /* if old and new are the same, this'll just do one lock. */
1106 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1107 &new_dir_bh, new_dir);
1108 if (status < 0) {
1109 mlog_errno(status);
1110 goto bail;
1111 }
1112 parents_locked = 1;
1113
1114 /* make sure both dirs have bhs
1115 * get an extra ref on old_dir_bh if old==new */
1116 if (!new_dir_bh) {
1117 if (old_dir_bh) {
1118 new_dir_bh = old_dir_bh;
1119 get_bh(new_dir_bh);
1120 } else {
1121 mlog(ML_ERROR, "no old_dir_bh!\n");
1122 status = -EIO;
1123 goto bail;
1124 }
1125 }
1126
1127 /*
1128 * Aside from allowing a meta data update, the locking here
1129 * also ensures that the downconvert thread on other nodes
1130 * won't have to concurrently downconvert the inode and the
1131 * dentry locks.
1132 */
1133 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1134 OI_LS_PARENT);
1135 if (status < 0) {
1136 if (status != -ENOENT)
1137 mlog_errno(status);
1138 goto bail;
1139 }
1140 old_child_locked = 1;
1141
1142 status = ocfs2_remote_dentry_delete(old_dentry);
1143 if (status < 0) {
1144 mlog_errno(status);
1145 goto bail;
1146 }
1147
1148 if (S_ISDIR(old_inode->i_mode)) {
1149 u64 old_inode_parent;
1150
1151 update_dot_dot = 1;
1152 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1153 old_inode,
1154 &old_inode_dot_dot_res);
1155 if (status) {
1156 status = -EIO;
1157 goto bail;
1158 }
1159
1160 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1161 status = -EIO;
1162 goto bail;
1163 }
1164
1165 if (!new_inode && new_dir != old_dir &&
1166 new_dir->i_nlink >= ocfs2_link_max(osb)) {
1167 status = -EMLINK;
1168 goto bail;
1169 }
1170 }
1171
1172 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1173 old_dentry->d_name.len,
1174 &old_de_ino);
1175 if (status) {
1176 status = -ENOENT;
1177 goto bail;
1178 }
1179
1180 /*
1181 * Check for inode number is _not_ due to possible IO errors.
1182 * We might rmdir the source, keep it as pwd of some process
1183 * and merrily kill the link to whatever was created under the
1184 * same name. Goodbye sticky bit ;-<
1185 */
1186 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1187 status = -ENOENT;
1188 goto bail;
1189 }
1190
1191 /* check if the target already exists (in which case we need
1192 * to delete it */
1193 status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1194 new_dentry->d_name.len,
1195 &newfe_blkno, new_dir,
1196 &target_lookup_res);
1197 /* The only error we allow here is -ENOENT because the new
1198 * file not existing is perfectly valid. */
1199 if ((status < 0) && (status != -ENOENT)) {
1200 /* If we cannot find the file specified we should just */
1201 /* return the error... */
1202 mlog_errno(status);
1203 goto bail;
1204 }
1205 if (status == 0)
1206 target_exists = 1;
1207
1208 if (!target_exists && new_inode) {
1209 /*
1210 * Target was unlinked by another node while we were
1211 * waiting to get to ocfs2_rename(). There isn't
1212 * anything we can do here to help the situation, so
1213 * bubble up the appropriate error.
1214 */
1215 status = -ENOENT;
1216 goto bail;
1217 }
1218
1219 /* In case we need to overwrite an existing file, we blow it
1220 * away first */
1221 if (target_exists) {
1222 /* VFS didn't think there existed an inode here, but
1223 * someone else in the cluster must have raced our
1224 * rename to create one. Today we error cleanly, in
1225 * the future we should consider calling iget to build
1226 * a new struct inode for this entry. */
1227 if (!new_inode) {
1228 status = -EACCES;
1229
1230 mlog(0, "We found an inode for name %.*s but VFS "
1231 "didn't give us one.\n", new_dentry->d_name.len,
1232 new_dentry->d_name.name);
1233 goto bail;
1234 }
1235
1236 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1237 status = -EACCES;
1238
1239 mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n",
1240 (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1241 (unsigned long long)newfe_blkno,
1242 OCFS2_I(new_inode)->ip_flags);
1243 goto bail;
1244 }
1245
1246 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1247 if (status < 0) {
1248 if (status != -ENOENT)
1249 mlog_errno(status);
1250 goto bail;
1251 }
1252 new_child_locked = 1;
1253
1254 status = ocfs2_remote_dentry_delete(new_dentry);
1255 if (status < 0) {
1256 mlog_errno(status);
1257 goto bail;
1258 }
1259
1260 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1261
1262 mlog(0, "aha rename over existing... new_blkno=%llu "
1263 "newfebh=%p bhblocknr=%llu\n",
1264 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1265 (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1266
1267 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1268 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1269 OCFS2_I(new_inode)->ip_blkno,
1270 orphan_name, &orphan_insert);
1271 if (status < 0) {
1272 mlog_errno(status);
1273 goto bail;
1274 }
1275 }
1276 } else {
1277 BUG_ON(new_dentry->d_parent->d_inode != new_dir);
1278
1279 status = ocfs2_check_dir_for_entry(new_dir,
1280 new_dentry->d_name.name,
1281 new_dentry->d_name.len);
1282 if (status)
1283 goto bail;
1284
1285 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1286 new_dentry->d_name.name,
1287 new_dentry->d_name.len,
1288 &target_insert);
1289 if (status < 0) {
1290 mlog_errno(status);
1291 goto bail;
1292 }
1293 }
1294
1295 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1296 if (IS_ERR(handle)) {
1297 status = PTR_ERR(handle);
1298 handle = NULL;
1299 mlog_errno(status);
1300 goto bail;
1301 }
1302
1303 if (target_exists) {
1304 if (S_ISDIR(new_inode->i_mode)) {
1305 if (new_inode->i_nlink != 2 ||
1306 !ocfs2_empty_dir(new_inode)) {
1307 status = -ENOTEMPTY;
1308 goto bail;
1309 }
1310 }
1311 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1312 newfe_bh,
1313 OCFS2_JOURNAL_ACCESS_WRITE);
1314 if (status < 0) {
1315 mlog_errno(status);
1316 goto bail;
1317 }
1318
1319 if (S_ISDIR(new_inode->i_mode) ||
1320 (ocfs2_read_links_count(newfe) == 1)) {
1321 status = ocfs2_orphan_add(osb, handle, new_inode,
1322 newfe_bh, orphan_name,
1323 &orphan_insert, orphan_dir);
1324 if (status < 0) {
1325 mlog_errno(status);
1326 goto bail;
1327 }
1328 }
1329
1330 /* change the dirent to point to the correct inode */
1331 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1332 old_inode);
1333 if (status < 0) {
1334 mlog_errno(status);
1335 goto bail;
1336 }
1337 new_dir->i_version++;
1338
1339 if (S_ISDIR(new_inode->i_mode))
1340 ocfs2_set_links_count(newfe, 0);
1341 else
1342 ocfs2_add_links_count(newfe, -1);
1343 ocfs2_journal_dirty(handle, newfe_bh);
1344 } else {
1345 /* if the name was not found in new_dir, add it now */
1346 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1347 OCFS2_I(old_inode)->ip_blkno,
1348 new_dir_bh, &target_insert);
1349 }
1350
1351 old_inode->i_ctime = CURRENT_TIME;
1352 mark_inode_dirty(old_inode);
1353
1354 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1355 old_inode_bh,
1356 OCFS2_JOURNAL_ACCESS_WRITE);
1357 if (status >= 0) {
1358 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1359
1360 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1361 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1362 ocfs2_journal_dirty(handle, old_inode_bh);
1363 } else
1364 mlog_errno(status);
1365
1366 /*
1367 * Now that the name has been added to new_dir, remove the old name.
1368 *
1369 * We don't keep any directory entry context around until now
1370 * because the insert might have changed the type of directory
1371 * we're dealing with.
1372 */
1373 status = ocfs2_find_entry(old_dentry->d_name.name,
1374 old_dentry->d_name.len, old_dir,
1375 &old_entry_lookup);
1376 if (status)
1377 goto bail;
1378
1379 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1380 if (status < 0) {
1381 mlog_errno(status);
1382 goto bail;
1383 }
1384
1385 if (new_inode) {
1386 new_inode->i_nlink--;
1387 new_inode->i_ctime = CURRENT_TIME;
1388 }
1389 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1390
1391 if (update_dot_dot) {
1392 status = ocfs2_update_entry(old_inode, handle,
1393 &old_inode_dot_dot_res, new_dir);
1394 old_dir->i_nlink--;
1395 if (new_inode) {
1396 new_inode->i_nlink--;
1397 } else {
1398 inc_nlink(new_dir);
1399 mark_inode_dirty(new_dir);
1400 }
1401 }
1402 mark_inode_dirty(old_dir);
1403 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1404 if (new_inode) {
1405 mark_inode_dirty(new_inode);
1406 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1407 }
1408
1409 if (old_dir != new_dir) {
1410 /* Keep the same times on both directories.*/
1411 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1412
1413 /*
1414 * This will also pick up the i_nlink change from the
1415 * block above.
1416 */
1417 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1418 }
1419
1420 if (old_dir_nlink != old_dir->i_nlink) {
1421 if (!old_dir_bh) {
1422 mlog(ML_ERROR, "need to change nlink for old dir "
1423 "%llu from %d to %d but bh is NULL!\n",
1424 (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1425 (int)old_dir_nlink, old_dir->i_nlink);
1426 } else {
1427 struct ocfs2_dinode *fe;
1428 status = ocfs2_journal_access_di(handle,
1429 INODE_CACHE(old_dir),
1430 old_dir_bh,
1431 OCFS2_JOURNAL_ACCESS_WRITE);
1432 fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1433 ocfs2_set_links_count(fe, old_dir->i_nlink);
1434 ocfs2_journal_dirty(handle, old_dir_bh);
1435 }
1436 }
1437 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1438 status = 0;
1439 bail:
1440 if (rename_lock)
1441 ocfs2_rename_unlock(osb);
1442
1443 if (handle)
1444 ocfs2_commit_trans(osb, handle);
1445
1446 if (parents_locked)
1447 ocfs2_double_unlock(old_dir, new_dir);
1448
1449 if (old_child_locked)
1450 ocfs2_inode_unlock(old_inode, 1);
1451
1452 if (new_child_locked)
1453 ocfs2_inode_unlock(new_inode, 1);
1454
1455 if (orphan_dir) {
1456 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1457 ocfs2_inode_unlock(orphan_dir, 1);
1458 mutex_unlock(&orphan_dir->i_mutex);
1459 iput(orphan_dir);
1460 }
1461
1462 if (new_inode)
1463 sync_mapping_buffers(old_inode->i_mapping);
1464
1465 if (new_inode)
1466 iput(new_inode);
1467
1468 ocfs2_free_dir_lookup_result(&target_lookup_res);
1469 ocfs2_free_dir_lookup_result(&old_entry_lookup);
1470 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1471 ocfs2_free_dir_lookup_result(&orphan_insert);
1472 ocfs2_free_dir_lookup_result(&target_insert);
1473
1474 brelse(newfe_bh);
1475 brelse(old_inode_bh);
1476 brelse(old_dir_bh);
1477 brelse(new_dir_bh);
1478
1479 mlog_exit(status);
1480
1481 return status;
1482 }
1483
1484 /*
1485 * we expect i_size = strlen(symname). Copy symname into the file
1486 * data, including the null terminator.
1487 */
1488 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1489 handle_t *handle,
1490 struct inode *inode,
1491 const char *symname)
1492 {
1493 struct buffer_head **bhs = NULL;
1494 const char *c;
1495 struct super_block *sb = osb->sb;
1496 u64 p_blkno, p_blocks;
1497 int virtual, blocks, status, i, bytes_left;
1498
1499 bytes_left = i_size_read(inode) + 1;
1500 /* we can't trust i_blocks because we're actually going to
1501 * write i_size + 1 bytes. */
1502 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1503
1504 mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n",
1505 (unsigned long long)inode->i_blocks,
1506 i_size_read(inode), blocks);
1507
1508 /* Sanity check -- make sure we're going to fit. */
1509 if (bytes_left >
1510 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1511 status = -EIO;
1512 mlog_errno(status);
1513 goto bail;
1514 }
1515
1516 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1517 if (!bhs) {
1518 status = -ENOMEM;
1519 mlog_errno(status);
1520 goto bail;
1521 }
1522
1523 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1524 NULL);
1525 if (status < 0) {
1526 mlog_errno(status);
1527 goto bail;
1528 }
1529
1530 /* links can never be larger than one cluster so we know this
1531 * is all going to be contiguous, but do a sanity check
1532 * anyway. */
1533 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1534 status = -EIO;
1535 mlog_errno(status);
1536 goto bail;
1537 }
1538
1539 virtual = 0;
1540 while(bytes_left > 0) {
1541 c = &symname[virtual * sb->s_blocksize];
1542
1543 bhs[virtual] = sb_getblk(sb, p_blkno);
1544 if (!bhs[virtual]) {
1545 status = -ENOMEM;
1546 mlog_errno(status);
1547 goto bail;
1548 }
1549 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1550 bhs[virtual]);
1551
1552 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1553 bhs[virtual],
1554 OCFS2_JOURNAL_ACCESS_CREATE);
1555 if (status < 0) {
1556 mlog_errno(status);
1557 goto bail;
1558 }
1559
1560 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1561
1562 memcpy(bhs[virtual]->b_data, c,
1563 (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1564 bytes_left);
1565
1566 ocfs2_journal_dirty(handle, bhs[virtual]);
1567
1568 virtual++;
1569 p_blkno++;
1570 bytes_left -= sb->s_blocksize;
1571 }
1572
1573 status = 0;
1574 bail:
1575
1576 if (bhs) {
1577 for(i = 0; i < blocks; i++)
1578 brelse(bhs[i]);
1579 kfree(bhs);
1580 }
1581
1582 mlog_exit(status);
1583 return status;
1584 }
1585
1586 static int ocfs2_symlink(struct inode *dir,
1587 struct dentry *dentry,
1588 const char *symname)
1589 {
1590 int status, l, credits;
1591 u64 newsize;
1592 struct ocfs2_super *osb = NULL;
1593 struct inode *inode = NULL;
1594 struct super_block *sb;
1595 struct buffer_head *new_fe_bh = NULL;
1596 struct buffer_head *parent_fe_bh = NULL;
1597 struct ocfs2_dinode *fe = NULL;
1598 struct ocfs2_dinode *dirfe;
1599 handle_t *handle = NULL;
1600 struct ocfs2_alloc_context *inode_ac = NULL;
1601 struct ocfs2_alloc_context *data_ac = NULL;
1602 struct ocfs2_alloc_context *xattr_ac = NULL;
1603 int want_clusters = 0;
1604 int xattr_credits = 0;
1605 struct ocfs2_security_xattr_info si = {
1606 .enable = 1,
1607 };
1608 int did_quota = 0, did_quota_inode = 0;
1609 struct ocfs2_dir_lookup_result lookup = { NULL, };
1610 sigset_t oldset;
1611 int did_block_signals = 0;
1612
1613 mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir,
1614 dentry, symname, dentry->d_name.len, dentry->d_name.name);
1615
1616 dquot_initialize(dir);
1617
1618 sb = dir->i_sb;
1619 osb = OCFS2_SB(sb);
1620
1621 l = strlen(symname) + 1;
1622
1623 credits = ocfs2_calc_symlink_credits(sb);
1624
1625 /* lock the parent directory */
1626 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1627 if (status < 0) {
1628 if (status != -ENOENT)
1629 mlog_errno(status);
1630 return status;
1631 }
1632
1633 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1634 if (!ocfs2_read_links_count(dirfe)) {
1635 /* can't make a file in a deleted directory. */
1636 status = -ENOENT;
1637 goto bail;
1638 }
1639
1640 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1641 dentry->d_name.len);
1642 if (status)
1643 goto bail;
1644
1645 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1646 dentry->d_name.name,
1647 dentry->d_name.len, &lookup);
1648 if (status < 0) {
1649 mlog_errno(status);
1650 goto bail;
1651 }
1652
1653 status = ocfs2_reserve_new_inode(osb, &inode_ac);
1654 if (status < 0) {
1655 if (status != -ENOSPC)
1656 mlog_errno(status);
1657 goto bail;
1658 }
1659
1660 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1661 if (!inode) {
1662 status = -ENOMEM;
1663 mlog_errno(status);
1664 goto bail;
1665 }
1666
1667 /* get security xattr */
1668 status = ocfs2_init_security_get(inode, dir, &si);
1669 if (status) {
1670 if (status == -EOPNOTSUPP)
1671 si.enable = 0;
1672 else {
1673 mlog_errno(status);
1674 goto bail;
1675 }
1676 }
1677
1678 /* calculate meta data/clusters for setting security xattr */
1679 if (si.enable) {
1680 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1681 &xattr_credits, &xattr_ac);
1682 if (status < 0) {
1683 mlog_errno(status);
1684 goto bail;
1685 }
1686 }
1687
1688 /* don't reserve bitmap space for fast symlinks. */
1689 if (l > ocfs2_fast_symlink_chars(sb))
1690 want_clusters += 1;
1691
1692 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1693 if (status < 0) {
1694 if (status != -ENOSPC)
1695 mlog_errno(status);
1696 goto bail;
1697 }
1698
1699 handle = ocfs2_start_trans(osb, credits + xattr_credits);
1700 if (IS_ERR(handle)) {
1701 status = PTR_ERR(handle);
1702 handle = NULL;
1703 mlog_errno(status);
1704 goto bail;
1705 }
1706
1707 /* Starting to change things, restart is no longer possible. */
1708 ocfs2_block_signals(&oldset);
1709 did_block_signals = 1;
1710
1711 status = dquot_alloc_inode(inode);
1712 if (status)
1713 goto bail;
1714 did_quota_inode = 1;
1715
1716 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry,
1717 inode->i_mode, dentry->d_name.len,
1718 dentry->d_name.name);
1719
1720 status = ocfs2_mknod_locked(osb, dir, inode,
1721 0, &new_fe_bh, parent_fe_bh, handle,
1722 inode_ac);
1723 if (status < 0) {
1724 mlog_errno(status);
1725 goto bail;
1726 }
1727
1728 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1729 inode->i_rdev = 0;
1730 newsize = l - 1;
1731 if (l > ocfs2_fast_symlink_chars(sb)) {
1732 u32 offset = 0;
1733
1734 inode->i_op = &ocfs2_symlink_inode_operations;
1735 status = dquot_alloc_space_nodirty(inode,
1736 ocfs2_clusters_to_bytes(osb->sb, 1));
1737 if (status)
1738 goto bail;
1739 did_quota = 1;
1740 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1741 new_fe_bh,
1742 handle, data_ac, NULL,
1743 NULL);
1744 if (status < 0) {
1745 if (status != -ENOSPC && status != -EINTR) {
1746 mlog(ML_ERROR,
1747 "Failed to extend file to %llu\n",
1748 (unsigned long long)newsize);
1749 mlog_errno(status);
1750 status = -ENOSPC;
1751 }
1752 goto bail;
1753 }
1754 i_size_write(inode, newsize);
1755 inode->i_blocks = ocfs2_inode_sector_count(inode);
1756 } else {
1757 inode->i_op = &ocfs2_fast_symlink_inode_operations;
1758 memcpy((char *) fe->id2.i_symlink, symname, l);
1759 i_size_write(inode, newsize);
1760 inode->i_blocks = 0;
1761 }
1762
1763 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1764 if (status < 0) {
1765 mlog_errno(status);
1766 goto bail;
1767 }
1768
1769 if (!ocfs2_inode_is_fast_symlink(inode)) {
1770 status = ocfs2_create_symlink_data(osb, handle, inode,
1771 symname);
1772 if (status < 0) {
1773 mlog_errno(status);
1774 goto bail;
1775 }
1776 }
1777
1778 if (si.enable) {
1779 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1780 xattr_ac, data_ac);
1781 if (status < 0) {
1782 mlog_errno(status);
1783 goto bail;
1784 }
1785 }
1786
1787 /*
1788 * Do this before adding the entry to the directory. We add
1789 * also set d_op after success so that ->d_iput() will cleanup
1790 * the dentry lock even if ocfs2_add_entry() fails below.
1791 */
1792 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1793 if (status) {
1794 mlog_errno(status);
1795 goto bail;
1796 }
1797 dentry->d_op = &ocfs2_dentry_ops;
1798
1799 status = ocfs2_add_entry(handle, dentry, inode,
1800 le64_to_cpu(fe->i_blkno), parent_fe_bh,
1801 &lookup);
1802 if (status < 0) {
1803 mlog_errno(status);
1804 goto bail;
1805 }
1806
1807 insert_inode_hash(inode);
1808 d_instantiate(dentry, inode);
1809 bail:
1810 if (status < 0 && did_quota)
1811 dquot_free_space_nodirty(inode,
1812 ocfs2_clusters_to_bytes(osb->sb, 1));
1813 if (status < 0 && did_quota_inode)
1814 dquot_free_inode(inode);
1815 if (handle)
1816 ocfs2_commit_trans(osb, handle);
1817
1818 ocfs2_inode_unlock(dir, 1);
1819 if (did_block_signals)
1820 ocfs2_unblock_signals(&oldset);
1821
1822 brelse(new_fe_bh);
1823 brelse(parent_fe_bh);
1824 kfree(si.name);
1825 kfree(si.value);
1826 ocfs2_free_dir_lookup_result(&lookup);
1827 if (inode_ac)
1828 ocfs2_free_alloc_context(inode_ac);
1829 if (data_ac)
1830 ocfs2_free_alloc_context(data_ac);
1831 if (xattr_ac)
1832 ocfs2_free_alloc_context(xattr_ac);
1833 if ((status < 0) && inode) {
1834 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
1835 clear_nlink(inode);
1836 iput(inode);
1837 }
1838
1839 mlog_exit(status);
1840
1841 return status;
1842 }
1843
1844 static int ocfs2_blkno_stringify(u64 blkno, char *name)
1845 {
1846 int status, namelen;
1847
1848 mlog_entry_void();
1849
1850 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
1851 (long long)blkno);
1852 if (namelen <= 0) {
1853 if (namelen)
1854 status = namelen;
1855 else
1856 status = -EINVAL;
1857 mlog_errno(status);
1858 goto bail;
1859 }
1860 if (namelen != OCFS2_ORPHAN_NAMELEN) {
1861 status = -EINVAL;
1862 mlog_errno(status);
1863 goto bail;
1864 }
1865
1866 mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name,
1867 namelen);
1868
1869 status = 0;
1870 bail:
1871 mlog_exit(status);
1872 return status;
1873 }
1874
1875 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
1876 struct inode **ret_orphan_dir,
1877 struct buffer_head **ret_orphan_dir_bh)
1878 {
1879 struct inode *orphan_dir_inode;
1880 struct buffer_head *orphan_dir_bh = NULL;
1881 int ret = 0;
1882
1883 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
1884 ORPHAN_DIR_SYSTEM_INODE,
1885 osb->slot_num);
1886 if (!orphan_dir_inode) {
1887 ret = -ENOENT;
1888 mlog_errno(ret);
1889 return ret;
1890 }
1891
1892 mutex_lock(&orphan_dir_inode->i_mutex);
1893
1894 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
1895 if (ret < 0) {
1896 mutex_unlock(&orphan_dir_inode->i_mutex);
1897 iput(orphan_dir_inode);
1898
1899 mlog_errno(ret);
1900 return ret;
1901 }
1902
1903 *ret_orphan_dir = orphan_dir_inode;
1904 *ret_orphan_dir_bh = orphan_dir_bh;
1905
1906 return 0;
1907 }
1908
1909 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
1910 struct buffer_head *orphan_dir_bh,
1911 u64 blkno,
1912 char *name,
1913 struct ocfs2_dir_lookup_result *lookup)
1914 {
1915 int ret;
1916 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
1917
1918 ret = ocfs2_blkno_stringify(blkno, name);
1919 if (ret < 0) {
1920 mlog_errno(ret);
1921 return ret;
1922 }
1923
1924 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
1925 orphan_dir_bh, name,
1926 OCFS2_ORPHAN_NAMELEN, lookup);
1927 if (ret < 0) {
1928 mlog_errno(ret);
1929 return ret;
1930 }
1931
1932 return 0;
1933 }
1934
1935 /**
1936 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
1937 * insertion of an orphan.
1938 * @osb: ocfs2 file system
1939 * @ret_orphan_dir: Orphan dir inode - returned locked!
1940 * @blkno: Actual block number of the inode to be inserted into orphan dir.
1941 * @lookup: dir lookup result, to be passed back into functions like
1942 * ocfs2_orphan_add
1943 *
1944 * Returns zero on success and the ret_orphan_dir, name and lookup
1945 * fields will be populated.
1946 *
1947 * Returns non-zero on failure.
1948 */
1949 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
1950 struct inode **ret_orphan_dir,
1951 u64 blkno,
1952 char *name,
1953 struct ocfs2_dir_lookup_result *lookup)
1954 {
1955 struct inode *orphan_dir_inode = NULL;
1956 struct buffer_head *orphan_dir_bh = NULL;
1957 int ret = 0;
1958
1959 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
1960 &orphan_dir_bh);
1961 if (ret < 0) {
1962 mlog_errno(ret);
1963 return ret;
1964 }
1965
1966 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
1967 blkno, name, lookup);
1968 if (ret < 0) {
1969 mlog_errno(ret);
1970 goto out;
1971 }
1972
1973 *ret_orphan_dir = orphan_dir_inode;
1974
1975 out:
1976 brelse(orphan_dir_bh);
1977
1978 if (ret) {
1979 ocfs2_inode_unlock(orphan_dir_inode, 1);
1980 mutex_unlock(&orphan_dir_inode->i_mutex);
1981 iput(orphan_dir_inode);
1982 }
1983
1984 mlog_exit(ret);
1985 return ret;
1986 }
1987
1988 static int ocfs2_orphan_add(struct ocfs2_super *osb,
1989 handle_t *handle,
1990 struct inode *inode,
1991 struct buffer_head *fe_bh,
1992 char *name,
1993 struct ocfs2_dir_lookup_result *lookup,
1994 struct inode *orphan_dir_inode)
1995 {
1996 struct buffer_head *orphan_dir_bh = NULL;
1997 int status = 0;
1998 struct ocfs2_dinode *orphan_fe;
1999 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2000
2001 mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);
2002
2003 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2004 if (status < 0) {
2005 mlog_errno(status);
2006 goto leave;
2007 }
2008
2009 status = ocfs2_journal_access_di(handle,
2010 INODE_CACHE(orphan_dir_inode),
2011 orphan_dir_bh,
2012 OCFS2_JOURNAL_ACCESS_WRITE);
2013 if (status < 0) {
2014 mlog_errno(status);
2015 goto leave;
2016 }
2017
2018 /* we're a cluster, and nlink can change on disk from
2019 * underneath us... */
2020 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2021 if (S_ISDIR(inode->i_mode))
2022 ocfs2_add_links_count(orphan_fe, 1);
2023 orphan_dir_inode->i_nlink = ocfs2_read_links_count(orphan_fe);
2024 ocfs2_journal_dirty(handle, orphan_dir_bh);
2025
2026 status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2027 OCFS2_ORPHAN_NAMELEN, inode,
2028 OCFS2_I(inode)->ip_blkno,
2029 orphan_dir_bh, lookup);
2030 if (status < 0) {
2031 mlog_errno(status);
2032 goto leave;
2033 }
2034
2035 /*
2036 * We're going to journal the change of i_flags and i_orphaned_slot.
2037 * It's safe anyway, though some callers may duplicate the journaling.
2038 * Journaling within the func just make the logic look more
2039 * straightforward.
2040 */
2041 status = ocfs2_journal_access_di(handle,
2042 INODE_CACHE(inode),
2043 fe_bh,
2044 OCFS2_JOURNAL_ACCESS_WRITE);
2045 if (status < 0) {
2046 mlog_errno(status);
2047 goto leave;
2048 }
2049
2050 le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL);
2051 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2052
2053 /* Record which orphan dir our inode now resides
2054 * in. delete_inode will use this to determine which orphan
2055 * dir to lock. */
2056 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2057
2058 ocfs2_journal_dirty(handle, fe_bh);
2059
2060 mlog(0, "Inode %llu orphaned in slot %d\n",
2061 (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num);
2062
2063 leave:
2064 brelse(orphan_dir_bh);
2065
2066 mlog_exit(status);
2067 return status;
2068 }
2069
2070 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2071 int ocfs2_orphan_del(struct ocfs2_super *osb,
2072 handle_t *handle,
2073 struct inode *orphan_dir_inode,
2074 struct inode *inode,
2075 struct buffer_head *orphan_dir_bh)
2076 {
2077 char name[OCFS2_ORPHAN_NAMELEN + 1];
2078 struct ocfs2_dinode *orphan_fe;
2079 int status = 0;
2080 struct ocfs2_dir_lookup_result lookup = { NULL, };
2081
2082 mlog_entry_void();
2083
2084 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2085 if (status < 0) {
2086 mlog_errno(status);
2087 goto leave;
2088 }
2089
2090 mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n",
2091 name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2092 OCFS2_ORPHAN_NAMELEN);
2093
2094 /* find it's spot in the orphan directory */
2095 status = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, orphan_dir_inode,
2096 &lookup);
2097 if (status) {
2098 mlog_errno(status);
2099 goto leave;
2100 }
2101
2102 /* remove it from the orphan directory */
2103 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2104 if (status < 0) {
2105 mlog_errno(status);
2106 goto leave;
2107 }
2108
2109 status = ocfs2_journal_access_di(handle,
2110 INODE_CACHE(orphan_dir_inode),
2111 orphan_dir_bh,
2112 OCFS2_JOURNAL_ACCESS_WRITE);
2113 if (status < 0) {
2114 mlog_errno(status);
2115 goto leave;
2116 }
2117
2118 /* do the i_nlink dance! :) */
2119 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2120 if (S_ISDIR(inode->i_mode))
2121 ocfs2_add_links_count(orphan_fe, -1);
2122 orphan_dir_inode->i_nlink = ocfs2_read_links_count(orphan_fe);
2123 ocfs2_journal_dirty(handle, orphan_dir_bh);
2124
2125 leave:
2126 ocfs2_free_dir_lookup_result(&lookup);
2127
2128 mlog_exit(status);
2129 return status;
2130 }
2131
2132 /**
2133 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to recieve a newly
2134 * allocated file. This is different from the typical 'add to orphan dir'
2135 * operation in that the inode does not yet exist. This is a problem because
2136 * the orphan dir stringifies the inode block number to come up with it's
2137 * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2138 * problem. This function works around it by calling deeper into the orphan
2139 * and suballoc code than other callers. Use this only by necessity.
2140 * @dir: The directory which this inode will ultimately wind up under - not the
2141 * orphan dir!
2142 * @dir_bh: buffer_head the @dir inode block
2143 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2144 * with the string to be used for orphan dirent. Pass back to the orphan dir
2145 * code.
2146 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2147 * dir code.
2148 * @ret_di_blkno: block number where the new inode will be allocated.
2149 * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2150 * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2151 *
2152 * Returns zero on success and the ret_orphan_dir, name and lookup
2153 * fields will be populated.
2154 *
2155 * Returns non-zero on failure.
2156 */
2157 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2158 struct buffer_head *dir_bh,
2159 char *orphan_name,
2160 struct inode **ret_orphan_dir,
2161 u64 *ret_di_blkno,
2162 struct ocfs2_dir_lookup_result *orphan_insert,
2163 struct ocfs2_alloc_context **ret_inode_ac)
2164 {
2165 int ret;
2166 u64 di_blkno;
2167 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2168 struct inode *orphan_dir = NULL;
2169 struct buffer_head *orphan_dir_bh = NULL;
2170 struct ocfs2_alloc_context *inode_ac = NULL;
2171
2172 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2173 if (ret < 0) {
2174 mlog_errno(ret);
2175 return ret;
2176 }
2177
2178 /* reserve an inode spot */
2179 ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2180 if (ret < 0) {
2181 if (ret != -ENOSPC)
2182 mlog_errno(ret);
2183 goto out;
2184 }
2185
2186 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2187 &di_blkno);
2188 if (ret) {
2189 mlog_errno(ret);
2190 goto out;
2191 }
2192
2193 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2194 di_blkno, orphan_name, orphan_insert);
2195 if (ret < 0) {
2196 mlog_errno(ret);
2197 goto out;
2198 }
2199
2200 out:
2201 if (ret == 0) {
2202 *ret_orphan_dir = orphan_dir;
2203 *ret_di_blkno = di_blkno;
2204 *ret_inode_ac = inode_ac;
2205 /*
2206 * orphan_name and orphan_insert are already up to
2207 * date via prepare_orphan_dir
2208 */
2209 } else {
2210 /* Unroll reserve_new_inode* */
2211 if (inode_ac)
2212 ocfs2_free_alloc_context(inode_ac);
2213
2214 /* Unroll orphan dir locking */
2215 mutex_unlock(&orphan_dir->i_mutex);
2216 ocfs2_inode_unlock(orphan_dir, 1);
2217 iput(orphan_dir);
2218 }
2219
2220 brelse(orphan_dir_bh);
2221
2222 return 0;
2223 }
2224
2225 int ocfs2_create_inode_in_orphan(struct inode *dir,
2226 int mode,
2227 struct inode **new_inode)
2228 {
2229 int status, did_quota_inode = 0;
2230 struct inode *inode = NULL;
2231 struct inode *orphan_dir = NULL;
2232 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2233 struct ocfs2_dinode *di = NULL;
2234 handle_t *handle = NULL;
2235 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2236 struct buffer_head *parent_di_bh = NULL;
2237 struct buffer_head *new_di_bh = NULL;
2238 struct ocfs2_alloc_context *inode_ac = NULL;
2239 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2240 u64 uninitialized_var(di_blkno), suballoc_loc;
2241 u16 suballoc_bit;
2242
2243 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2244 if (status < 0) {
2245 if (status != -ENOENT)
2246 mlog_errno(status);
2247 return status;
2248 }
2249
2250 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2251 orphan_name, &orphan_dir,
2252 &di_blkno, &orphan_insert, &inode_ac);
2253 if (status < 0) {
2254 if (status != -ENOSPC)
2255 mlog_errno(status);
2256 goto leave;
2257 }
2258
2259 inode = ocfs2_get_init_inode(dir, mode);
2260 if (!inode) {
2261 status = -ENOMEM;
2262 mlog_errno(status);
2263 goto leave;
2264 }
2265
2266 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2267 if (IS_ERR(handle)) {
2268 status = PTR_ERR(handle);
2269 handle = NULL;
2270 mlog_errno(status);
2271 goto leave;
2272 }
2273
2274 status = dquot_alloc_inode(inode);
2275 if (status)
2276 goto leave;
2277 did_quota_inode = 1;
2278
2279 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2280 &suballoc_loc,
2281 &suballoc_bit, di_blkno);
2282 if (status < 0) {
2283 mlog_errno(status);
2284 goto leave;
2285 }
2286
2287 inode->i_nlink = 0;
2288 /* do the real work now. */
2289 status = __ocfs2_mknod_locked(dir, inode,
2290 0, &new_di_bh, parent_di_bh, handle,
2291 inode_ac, di_blkno, suballoc_loc,
2292 suballoc_bit);
2293 if (status < 0) {
2294 mlog_errno(status);
2295 goto leave;
2296 }
2297
2298 di = (struct ocfs2_dinode *)new_di_bh->b_data;
2299 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2300 &orphan_insert, orphan_dir);
2301 if (status < 0) {
2302 mlog_errno(status);
2303 goto leave;
2304 }
2305
2306 /* get open lock so that only nodes can't remove it from orphan dir. */
2307 status = ocfs2_open_lock(inode);
2308 if (status < 0)
2309 mlog_errno(status);
2310
2311 insert_inode_hash(inode);
2312 leave:
2313 if (status < 0 && did_quota_inode)
2314 dquot_free_inode(inode);
2315 if (handle)
2316 ocfs2_commit_trans(osb, handle);
2317
2318 if (orphan_dir) {
2319 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2320 ocfs2_inode_unlock(orphan_dir, 1);
2321 mutex_unlock(&orphan_dir->i_mutex);
2322 iput(orphan_dir);
2323 }
2324
2325 if (status == -ENOSPC)
2326 mlog(0, "Disk is full\n");
2327
2328 if ((status < 0) && inode) {
2329 clear_nlink(inode);
2330 iput(inode);
2331 }
2332
2333 if (inode_ac)
2334 ocfs2_free_alloc_context(inode_ac);
2335
2336 brelse(new_di_bh);
2337
2338 if (!status)
2339 *new_inode = inode;
2340
2341 ocfs2_free_dir_lookup_result(&orphan_insert);
2342
2343 ocfs2_inode_unlock(dir, 1);
2344 brelse(parent_di_bh);
2345 return status;
2346 }
2347
2348 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2349 struct inode *inode,
2350 struct dentry *dentry)
2351 {
2352 int status = 0;
2353 struct buffer_head *parent_di_bh = NULL;
2354 handle_t *handle = NULL;
2355 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2356 struct ocfs2_dinode *dir_di, *di;
2357 struct inode *orphan_dir_inode = NULL;
2358 struct buffer_head *orphan_dir_bh = NULL;
2359 struct buffer_head *di_bh = NULL;
2360 struct ocfs2_dir_lookup_result lookup = { NULL, };
2361
2362 mlog_entry("(0x%p, 0x%p, %.*s')\n", dir, dentry,
2363 dentry->d_name.len, dentry->d_name.name);
2364
2365 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2366 if (status < 0) {
2367 if (status != -ENOENT)
2368 mlog_errno(status);
2369 return status;
2370 }
2371
2372 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2373 if (!dir_di->i_links_count) {
2374 /* can't make a file in a deleted directory. */
2375 status = -ENOENT;
2376 goto leave;
2377 }
2378
2379 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2380 dentry->d_name.len);
2381 if (status)
2382 goto leave;
2383
2384 /* get a spot inside the dir. */
2385 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2386 dentry->d_name.name,
2387 dentry->d_name.len, &lookup);
2388 if (status < 0) {
2389 mlog_errno(status);
2390 goto leave;
2391 }
2392
2393 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2394 ORPHAN_DIR_SYSTEM_INODE,
2395 osb->slot_num);
2396 if (!orphan_dir_inode) {
2397 status = -EEXIST;
2398 mlog_errno(status);
2399 goto leave;
2400 }
2401
2402 mutex_lock(&orphan_dir_inode->i_mutex);
2403
2404 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2405 if (status < 0) {
2406 mlog_errno(status);
2407 mutex_unlock(&orphan_dir_inode->i_mutex);
2408 iput(orphan_dir_inode);
2409 goto leave;
2410 }
2411
2412 status = ocfs2_read_inode_block(inode, &di_bh);
2413 if (status < 0) {
2414 mlog_errno(status);
2415 goto orphan_unlock;
2416 }
2417
2418 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2419 if (IS_ERR(handle)) {
2420 status = PTR_ERR(handle);
2421 handle = NULL;
2422 mlog_errno(status);
2423 goto orphan_unlock;
2424 }
2425
2426 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2427 di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2428 if (status < 0) {
2429 mlog_errno(status);
2430 goto out_commit;
2431 }
2432
2433 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2434 orphan_dir_bh);
2435 if (status < 0) {
2436 mlog_errno(status);
2437 goto out_commit;
2438 }
2439
2440 di = (struct ocfs2_dinode *)di_bh->b_data;
2441 le32_add_cpu(&di->i_flags, -OCFS2_ORPHANED_FL);
2442 di->i_orphaned_slot = 0;
2443 inode->i_nlink = 1;
2444 ocfs2_set_links_count(di, inode->i_nlink);
2445 ocfs2_journal_dirty(handle, di_bh);
2446
2447 status = ocfs2_add_entry(handle, dentry, inode,
2448 OCFS2_I(inode)->ip_blkno, parent_di_bh,
2449 &lookup);
2450 if (status < 0) {
2451 mlog_errno(status);
2452 goto out_commit;
2453 }
2454
2455 status = ocfs2_dentry_attach_lock(dentry, inode,
2456 OCFS2_I(dir)->ip_blkno);
2457 if (status) {
2458 mlog_errno(status);
2459 goto out_commit;
2460 }
2461
2462 dentry->d_op = &ocfs2_dentry_ops;
2463 d_instantiate(dentry, inode);
2464 status = 0;
2465 out_commit:
2466 ocfs2_commit_trans(osb, handle);
2467 orphan_unlock:
2468 ocfs2_inode_unlock(orphan_dir_inode, 1);
2469 mutex_unlock(&orphan_dir_inode->i_mutex);
2470 iput(orphan_dir_inode);
2471 leave:
2472
2473 ocfs2_inode_unlock(dir, 1);
2474
2475 brelse(di_bh);
2476 brelse(parent_di_bh);
2477 brelse(orphan_dir_bh);
2478
2479 ocfs2_free_dir_lookup_result(&lookup);
2480
2481 mlog_exit(status);
2482
2483 return status;
2484 }
2485
2486 const struct inode_operations ocfs2_dir_iops = {
2487 .create = ocfs2_create,
2488 .lookup = ocfs2_lookup,
2489 .link = ocfs2_link,
2490 .unlink = ocfs2_unlink,
2491 .rmdir = ocfs2_unlink,
2492 .symlink = ocfs2_symlink,
2493 .mkdir = ocfs2_mkdir,
2494 .mknod = ocfs2_mknod,
2495 .rename = ocfs2_rename,
2496 .setattr = ocfs2_setattr,
2497 .getattr = ocfs2_getattr,
2498 .permission = ocfs2_permission,
2499 .setxattr = generic_setxattr,
2500 .getxattr = generic_getxattr,
2501 .listxattr = ocfs2_listxattr,
2502 .removexattr = generic_removexattr,
2503 .fiemap = ocfs2_fiemap,
2504 };
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree