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ocfs2: Remove delete inode vote
[linux-2.6/kmemtrace.git] / fs / ocfs2 / namei.c
bloba93c15fdcef32c2064c4bbb2ebef9479418a59e1
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
44 #define MLOG_MASK_PREFIX ML_NAMEI
45 #include <cluster/masklog.h>
46
47 #include "ocfs2.h"
48
49 #include "alloc.h"
50 #include "dcache.h"
51 #include "dir.h"
52 #include "dlmglue.h"
53 #include "extent_map.h"
54 #include "file.h"
55 #include "inode.h"
56 #include "journal.h"
57 #include "namei.h"
58 #include "suballoc.h"
59 #include "super.h"
60 #include "symlink.h"
61 #include "sysfile.h"
62 #include "uptodate.h"
63 #include "vote.h"
64
65 #include "buffer_head_io.h"
66
67 #define NAMEI_RA_CHUNKS 2
68 #define NAMEI_RA_BLOCKS 4
69 #define NAMEI_RA_SIZE (NAMEI_RA_CHUNKS * NAMEI_RA_BLOCKS)
70 #define NAMEI_RA_INDEX(c,b) (((c) * NAMEI_RA_BLOCKS) + (b))
71
72 static int inline ocfs2_search_dirblock(struct buffer_head *bh,
73 struct inode *dir,
74 const char *name, int namelen,
75 unsigned long offset,
76 struct ocfs2_dir_entry **res_dir);
77
78 static int ocfs2_delete_entry(handle_t *handle,
79 struct inode *dir,
80 struct ocfs2_dir_entry *de_del,
81 struct buffer_head *bh);
82
83 static int __ocfs2_add_entry(handle_t *handle,
84 struct inode *dir,
85 const char *name, int namelen,
86 struct inode *inode, u64 blkno,
87 struct buffer_head *parent_fe_bh,
88 struct buffer_head *insert_bh);
89
90 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
91 struct inode *dir,
92 struct dentry *dentry, int mode,
93 dev_t dev,
94 struct buffer_head **new_fe_bh,
95 struct buffer_head *parent_fe_bh,
96 handle_t *handle,
97 struct inode **ret_inode,
98 struct ocfs2_alloc_context *inode_ac);
99
100 static int ocfs2_fill_new_dir(struct ocfs2_super *osb,
101 handle_t *handle,
102 struct inode *parent,
103 struct inode *inode,
104 struct buffer_head *fe_bh,
105 struct ocfs2_alloc_context *data_ac);
106
107 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
108 struct inode **ret_orphan_dir,
109 struct inode *inode,
110 char *name,
111 struct buffer_head **de_bh);
112
113 static int ocfs2_orphan_add(struct ocfs2_super *osb,
114 handle_t *handle,
115 struct inode *inode,
116 struct ocfs2_dinode *fe,
117 char *name,
118 struct buffer_head *de_bh,
119 struct inode *orphan_dir_inode);
120
121 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
122 handle_t *handle,
123 struct inode *inode,
124 const char *symname);
125
126 static inline int ocfs2_add_entry(handle_t *handle,
127 struct dentry *dentry,
128 struct inode *inode, u64 blkno,
129 struct buffer_head *parent_fe_bh,
130 struct buffer_head *insert_bh)
131 {
132 return __ocfs2_add_entry(handle, dentry->d_parent->d_inode,
133 dentry->d_name.name, dentry->d_name.len,
134 inode, blkno, parent_fe_bh, insert_bh);
135 }
136
137 /* An orphan dir name is an 8 byte value, printed as a hex string */
138 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
139
140 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
141 struct nameidata *nd)
142 {
143 int status;
144 u64 blkno;
145 struct buffer_head *dirent_bh = NULL;
146 struct inode *inode = NULL;
147 struct dentry *ret;
148 struct ocfs2_dir_entry *dirent;
149 struct ocfs2_inode_info *oi;
150
151 mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
152 dentry->d_name.len, dentry->d_name.name);
153
154 if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
155 ret = ERR_PTR(-ENAMETOOLONG);
156 goto bail;
157 }
158
159 mlog(0, "find name %.*s in directory %llu\n", dentry->d_name.len,
160 dentry->d_name.name, (unsigned long long)OCFS2_I(dir)->ip_blkno);
161
162 status = ocfs2_meta_lock(dir, NULL, 0);
163 if (status < 0) {
164 if (status != -ENOENT)
165 mlog_errno(status);
166 ret = ERR_PTR(status);
167 goto bail;
168 }
169
170 status = ocfs2_find_files_on_disk(dentry->d_name.name,
171 dentry->d_name.len, &blkno,
172 dir, &dirent_bh, &dirent);
173 if (status < 0)
174 goto bail_add;
175
176 inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0);
177 if (IS_ERR(inode)) {
178 ret = ERR_PTR(-EACCES);
179 goto bail_unlock;
180 }
181
182 oi = OCFS2_I(inode);
183 /* Clear any orphaned state... If we were able to look up the
184 * inode from a directory, it certainly can't be orphaned. We
185 * might have the bad state from a node which intended to
186 * orphan this inode but crashed before it could commit the
187 * unlink. */
188 spin_lock(&oi->ip_lock);
189 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
190 spin_unlock(&oi->ip_lock);
191
192 bail_add:
193 dentry->d_op = &ocfs2_dentry_ops;
194 ret = d_splice_alias(inode, dentry);
195
196 if (inode) {
197 /*
198 * If d_splice_alias() finds a DCACHE_DISCONNECTED
199 * dentry, it will d_move() it on top of ourse. The
200 * return value will indicate this however, so in
201 * those cases, we switch them around for the locking
202 * code.
203 *
204 * NOTE: This dentry already has ->d_op set from
205 * ocfs2_get_parent() and ocfs2_get_dentry()
206 */
207 if (ret)
208 dentry = ret;
209
210 status = ocfs2_dentry_attach_lock(dentry, inode,
211 OCFS2_I(dir)->ip_blkno);
212 if (status) {
213 mlog_errno(status);
214 ret = ERR_PTR(status);
215 goto bail_unlock;
216 }
217 }
218
219 bail_unlock:
220 /* Don't drop the cluster lock until *after* the d_add --
221 * unlink on another node will message us to remove that
222 * dentry under this lock so otherwise we can race this with
223 * the vote thread and have a stale dentry. */
224 ocfs2_meta_unlock(dir, 0);
225
226 bail:
227 if (dirent_bh)
228 brelse(dirent_bh);
229
230 mlog_exit_ptr(ret);
231
232 return ret;
233 }
234
235 static int ocfs2_fill_new_dir(struct ocfs2_super *osb,
236 handle_t *handle,
237 struct inode *parent,
238 struct inode *inode,
239 struct buffer_head *fe_bh,
240 struct ocfs2_alloc_context *data_ac)
241 {
242 int status;
243 struct buffer_head *new_bh = NULL;
244 struct ocfs2_dir_entry *de = NULL;
245
246 mlog_entry_void();
247
248 status = ocfs2_do_extend_dir(osb->sb, handle, inode, fe_bh,
249 data_ac, NULL, &new_bh);
250 if (status < 0) {
251 mlog_errno(status);
252 goto bail;
253 }
254
255 ocfs2_set_new_buffer_uptodate(inode, new_bh);
256
257 status = ocfs2_journal_access(handle, inode, new_bh,
258 OCFS2_JOURNAL_ACCESS_CREATE);
259 if (status < 0) {
260 mlog_errno(status);
261 goto bail;
262 }
263 memset(new_bh->b_data, 0, osb->sb->s_blocksize);
264
265 de = (struct ocfs2_dir_entry *) new_bh->b_data;
266 de->inode = cpu_to_le64(OCFS2_I(inode)->ip_blkno);
267 de->name_len = 1;
268 de->rec_len =
269 cpu_to_le16(OCFS2_DIR_REC_LEN(de->name_len));
270 strcpy(de->name, ".");
271 ocfs2_set_de_type(de, S_IFDIR);
272 de = (struct ocfs2_dir_entry *) ((char *)de + le16_to_cpu(de->rec_len));
273 de->inode = cpu_to_le64(OCFS2_I(parent)->ip_blkno);
274 de->rec_len = cpu_to_le16(inode->i_sb->s_blocksize -
275 OCFS2_DIR_REC_LEN(1));
276 de->name_len = 2;
277 strcpy(de->name, "..");
278 ocfs2_set_de_type(de, S_IFDIR);
279
280 status = ocfs2_journal_dirty(handle, new_bh);
281 if (status < 0) {
282 mlog_errno(status);
283 goto bail;
284 }
285
286 i_size_write(inode, inode->i_sb->s_blocksize);
287 inode->i_nlink = 2;
288 inode->i_blocks = ocfs2_align_bytes_to_sectors(inode->i_sb->s_blocksize);
289 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
290 if (status < 0) {
291 mlog_errno(status);
292 goto bail;
293 }
294
295 status = 0;
296 bail:
297 if (new_bh)
298 brelse(new_bh);
299
300 mlog_exit(status);
301 return status;
302 }
303
304 static int ocfs2_mknod(struct inode *dir,
305 struct dentry *dentry,
306 int mode,
307 dev_t dev)
308 {
309 int status = 0;
310 struct buffer_head *parent_fe_bh = NULL;
311 handle_t *handle = NULL;
312 struct ocfs2_super *osb;
313 struct ocfs2_dinode *dirfe;
314 struct buffer_head *new_fe_bh = NULL;
315 struct buffer_head *de_bh = NULL;
316 struct inode *inode = NULL;
317 struct ocfs2_alloc_context *inode_ac = NULL;
318 struct ocfs2_alloc_context *data_ac = NULL;
319
320 mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode,
321 (unsigned long)dev, dentry->d_name.len,
322 dentry->d_name.name);
323
324 /* get our super block */
325 osb = OCFS2_SB(dir->i_sb);
326
327 status = ocfs2_meta_lock(dir, &parent_fe_bh, 1);
328 if (status < 0) {
329 if (status != -ENOENT)
330 mlog_errno(status);
331 return status;
332 }
333
334 if (S_ISDIR(mode) && (dir->i_nlink >= OCFS2_LINK_MAX)) {
335 status = -EMLINK;
336 goto leave;
337 }
338
339 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
340 if (!dirfe->i_links_count) {
341 /* can't make a file in a deleted directory. */
342 status = -ENOENT;
343 goto leave;
344 }
345
346 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
347 dentry->d_name.len);
348 if (status)
349 goto leave;
350
351 /* get a spot inside the dir. */
352 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
353 dentry->d_name.name,
354 dentry->d_name.len, &de_bh);
355 if (status < 0) {
356 mlog_errno(status);
357 goto leave;
358 }
359
360 /* reserve an inode spot */
361 status = ocfs2_reserve_new_inode(osb, &inode_ac);
362 if (status < 0) {
363 if (status != -ENOSPC)
364 mlog_errno(status);
365 goto leave;
366 }
367
368 /* are we making a directory? If so, reserve a cluster for his
369 * 1st extent. */
370 if (S_ISDIR(mode)) {
371 status = ocfs2_reserve_clusters(osb, 1, &data_ac);
372 if (status < 0) {
373 if (status != -ENOSPC)
374 mlog_errno(status);
375 goto leave;
376 }
377 }
378
379 handle = ocfs2_start_trans(osb, OCFS2_MKNOD_CREDITS);
380 if (IS_ERR(handle)) {
381 status = PTR_ERR(handle);
382 handle = NULL;
383 mlog_errno(status);
384 goto leave;
385 }
386
387 /* do the real work now. */
388 status = ocfs2_mknod_locked(osb, dir, dentry, mode, dev,
389 &new_fe_bh, parent_fe_bh, handle,
390 &inode, inode_ac);
391 if (status < 0) {
392 mlog_errno(status);
393 goto leave;
394 }
395
396 if (S_ISDIR(mode)) {
397 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
398 new_fe_bh, data_ac);
399 if (status < 0) {
400 mlog_errno(status);
401 goto leave;
402 }
403
404 status = ocfs2_journal_access(handle, dir, parent_fe_bh,
405 OCFS2_JOURNAL_ACCESS_WRITE);
406 if (status < 0) {
407 mlog_errno(status);
408 goto leave;
409 }
410 le16_add_cpu(&dirfe->i_links_count, 1);
411 status = ocfs2_journal_dirty(handle, parent_fe_bh);
412 if (status < 0) {
413 mlog_errno(status);
414 goto leave;
415 }
416 inc_nlink(dir);
417 }
418
419 status = ocfs2_add_entry(handle, dentry, inode,
420 OCFS2_I(inode)->ip_blkno, parent_fe_bh,
421 de_bh);
422 if (status < 0) {
423 mlog_errno(status);
424 goto leave;
425 }
426
427 status = ocfs2_dentry_attach_lock(dentry, inode,
428 OCFS2_I(dir)->ip_blkno);
429 if (status) {
430 mlog_errno(status);
431 goto leave;
432 }
433
434 insert_inode_hash(inode);
435 dentry->d_op = &ocfs2_dentry_ops;
436 d_instantiate(dentry, inode);
437 status = 0;
438 leave:
439 if (handle)
440 ocfs2_commit_trans(osb, handle);
441
442 ocfs2_meta_unlock(dir, 1);
443
444 if (status == -ENOSPC)
445 mlog(0, "Disk is full\n");
446
447 if (new_fe_bh)
448 brelse(new_fe_bh);
449
450 if (de_bh)
451 brelse(de_bh);
452
453 if (parent_fe_bh)
454 brelse(parent_fe_bh);
455
456 if ((status < 0) && inode)
457 iput(inode);
458
459 if (inode_ac)
460 ocfs2_free_alloc_context(inode_ac);
461
462 if (data_ac)
463 ocfs2_free_alloc_context(data_ac);
464
465 mlog_exit(status);
466
467 return status;
468 }
469
470 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
471 struct inode *dir,
472 struct dentry *dentry, int mode,
473 dev_t dev,
474 struct buffer_head **new_fe_bh,
475 struct buffer_head *parent_fe_bh,
476 handle_t *handle,
477 struct inode **ret_inode,
478 struct ocfs2_alloc_context *inode_ac)
479 {
480 int status = 0;
481 struct ocfs2_dinode *fe = NULL;
482 struct ocfs2_extent_list *fel;
483 u64 fe_blkno = 0;
484 u16 suballoc_bit;
485 struct inode *inode = NULL;
486
487 mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode,
488 (unsigned long)dev, dentry->d_name.len,
489 dentry->d_name.name);
490
491 *new_fe_bh = NULL;
492 *ret_inode = NULL;
493
494 status = ocfs2_claim_new_inode(osb, handle, inode_ac, &suballoc_bit,
495 &fe_blkno);
496 if (status < 0) {
497 mlog_errno(status);
498 goto leave;
499 }
500
501 inode = new_inode(dir->i_sb);
502 if (IS_ERR(inode)) {
503 status = PTR_ERR(inode);
504 mlog(ML_ERROR, "new_inode failed!\n");
505 goto leave;
506 }
507
508 /* populate as many fields early on as possible - many of
509 * these are used by the support functions here and in
510 * callers. */
511 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
512 OCFS2_I(inode)->ip_blkno = fe_blkno;
513 if (S_ISDIR(mode))
514 inode->i_nlink = 2;
515 else
516 inode->i_nlink = 1;
517 inode->i_mode = mode;
518 spin_lock(&osb->osb_lock);
519 inode->i_generation = osb->s_next_generation++;
520 spin_unlock(&osb->osb_lock);
521
522 *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
523 if (!*new_fe_bh) {
524 status = -EIO;
525 mlog_errno(status);
526 goto leave;
527 }
528 ocfs2_set_new_buffer_uptodate(inode, *new_fe_bh);
529
530 status = ocfs2_journal_access(handle, inode, *new_fe_bh,
531 OCFS2_JOURNAL_ACCESS_CREATE);
532 if (status < 0) {
533 mlog_errno(status);
534 goto leave;
535 }
536
537 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
538 memset(fe, 0, osb->sb->s_blocksize);
539
540 fe->i_generation = cpu_to_le32(inode->i_generation);
541 fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
542 fe->i_blkno = cpu_to_le64(fe_blkno);
543 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
544 fe->i_suballoc_slot = cpu_to_le16(osb->slot_num);
545 fe->i_uid = cpu_to_le32(current->fsuid);
546 if (dir->i_mode & S_ISGID) {
547 fe->i_gid = cpu_to_le32(dir->i_gid);
548 if (S_ISDIR(mode))
549 mode |= S_ISGID;
550 } else
551 fe->i_gid = cpu_to_le32(current->fsgid);
552 fe->i_mode = cpu_to_le16(mode);
553 if (S_ISCHR(mode) || S_ISBLK(mode))
554 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
555
556 fe->i_links_count = cpu_to_le16(inode->i_nlink);
557
558 fe->i_last_eb_blk = 0;
559 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
560 le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL);
561 fe->i_atime = fe->i_ctime = fe->i_mtime =
562 cpu_to_le64(CURRENT_TIME.tv_sec);
563 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
564 cpu_to_le32(CURRENT_TIME.tv_nsec);
565 fe->i_dtime = 0;
566
567 fel = &fe->id2.i_list;
568 fel->l_tree_depth = 0;
569 fel->l_next_free_rec = 0;
570 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
571
572 status = ocfs2_journal_dirty(handle, *new_fe_bh);
573 if (status < 0) {
574 mlog_errno(status);
575 goto leave;
576 }
577
578 if (ocfs2_populate_inode(inode, fe, 1) < 0) {
579 mlog(ML_ERROR, "populate inode failed! bh->b_blocknr=%llu, "
580 "i_blkno=%llu, i_ino=%lu\n",
581 (unsigned long long) (*new_fe_bh)->b_blocknr,
582 (unsigned long long)fe->i_blkno, inode->i_ino);
583 BUG();
584 }
585
586 ocfs2_inode_set_new(osb, inode);
587 if (!ocfs2_mount_local(osb)) {
588 status = ocfs2_create_new_inode_locks(inode);
589 if (status < 0)
590 mlog_errno(status);
591 }
592
593 status = 0; /* error in ocfs2_create_new_inode_locks is not
594 * critical */
595
596 *ret_inode = inode;
597 leave:
598 if (status < 0) {
599 if (*new_fe_bh) {
600 brelse(*new_fe_bh);
601 *new_fe_bh = NULL;
602 }
603 if (inode)
604 iput(inode);
605 }
606
607 mlog_exit(status);
608 return status;
609 }
610
611 static int ocfs2_mkdir(struct inode *dir,
612 struct dentry *dentry,
613 int mode)
614 {
615 int ret;
616
617 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
618 dentry->d_name.len, dentry->d_name.name);
619 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
620 mlog_exit(ret);
621
622 return ret;
623 }
624
625 static int ocfs2_create(struct inode *dir,
626 struct dentry *dentry,
627 int mode,
628 struct nameidata *nd)
629 {
630 int ret;
631
632 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
633 dentry->d_name.len, dentry->d_name.name);
634 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
635 mlog_exit(ret);
636
637 return ret;
638 }
639
640 static int ocfs2_link(struct dentry *old_dentry,
641 struct inode *dir,
642 struct dentry *dentry)
643 {
644 handle_t *handle;
645 struct inode *inode = old_dentry->d_inode;
646 int err;
647 struct buffer_head *fe_bh = NULL;
648 struct buffer_head *parent_fe_bh = NULL;
649 struct buffer_head *de_bh = NULL;
650 struct ocfs2_dinode *fe = NULL;
651 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
652
653 mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino,
654 old_dentry->d_name.len, old_dentry->d_name.name,
655 dentry->d_name.len, dentry->d_name.name);
656
657 if (S_ISDIR(inode->i_mode))
658 return -EPERM;
659
660 err = ocfs2_meta_lock(dir, &parent_fe_bh, 1);
661 if (err < 0) {
662 if (err != -ENOENT)
663 mlog_errno(err);
664 return err;
665 }
666
667 if (!dir->i_nlink) {
668 err = -ENOENT;
669 goto out;
670 }
671
672 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
673 dentry->d_name.len);
674 if (err)
675 goto out;
676
677 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
678 dentry->d_name.name,
679 dentry->d_name.len, &de_bh);
680 if (err < 0) {
681 mlog_errno(err);
682 goto out;
683 }
684
685 err = ocfs2_meta_lock(inode, &fe_bh, 1);
686 if (err < 0) {
687 if (err != -ENOENT)
688 mlog_errno(err);
689 goto out;
690 }
691
692 fe = (struct ocfs2_dinode *) fe_bh->b_data;
693 if (le16_to_cpu(fe->i_links_count) >= OCFS2_LINK_MAX) {
694 err = -EMLINK;
695 goto out_unlock_inode;
696 }
697
698 handle = ocfs2_start_trans(osb, OCFS2_LINK_CREDITS);
699 if (IS_ERR(handle)) {
700 err = PTR_ERR(handle);
701 handle = NULL;
702 mlog_errno(err);
703 goto out_unlock_inode;
704 }
705
706 err = ocfs2_journal_access(handle, inode, fe_bh,
707 OCFS2_JOURNAL_ACCESS_WRITE);
708 if (err < 0) {
709 mlog_errno(err);
710 goto out_commit;
711 }
712
713 inc_nlink(inode);
714 inode->i_ctime = CURRENT_TIME;
715 fe->i_links_count = cpu_to_le16(inode->i_nlink);
716 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
717 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
718
719 err = ocfs2_journal_dirty(handle, fe_bh);
720 if (err < 0) {
721 le16_add_cpu(&fe->i_links_count, -1);
722 drop_nlink(inode);
723 mlog_errno(err);
724 goto out_commit;
725 }
726
727 err = ocfs2_add_entry(handle, dentry, inode,
728 OCFS2_I(inode)->ip_blkno,
729 parent_fe_bh, de_bh);
730 if (err) {
731 le16_add_cpu(&fe->i_links_count, -1);
732 drop_nlink(inode);
733 mlog_errno(err);
734 goto out_commit;
735 }
736
737 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
738 if (err) {
739 mlog_errno(err);
740 goto out_commit;
741 }
742
743 atomic_inc(&inode->i_count);
744 dentry->d_op = &ocfs2_dentry_ops;
745 d_instantiate(dentry, inode);
746
747 out_commit:
748 ocfs2_commit_trans(osb, handle);
749 out_unlock_inode:
750 ocfs2_meta_unlock(inode, 1);
751
752 out:
753 ocfs2_meta_unlock(dir, 1);
754
755 if (de_bh)
756 brelse(de_bh);
757 if (fe_bh)
758 brelse(fe_bh);
759 if (parent_fe_bh)
760 brelse(parent_fe_bh);
761
762 mlog_exit(err);
763
764 return err;
765 }
766
767 /*
768 * Takes and drops an exclusive lock on the given dentry. This will
769 * force other nodes to drop it.
770 */
771 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
772 {
773 int ret;
774
775 ret = ocfs2_dentry_lock(dentry, 1);
776 if (ret)
777 mlog_errno(ret);
778 else
779 ocfs2_dentry_unlock(dentry, 1);
780
781 return ret;
782 }
783
784 static inline int inode_is_unlinkable(struct inode *inode)
785 {
786 if (S_ISDIR(inode->i_mode)) {
787 if (inode->i_nlink == 2)
788 return 1;
789 return 0;
790 }
791
792 if (inode->i_nlink == 1)
793 return 1;
794 return 0;
795 }
796
797 static int ocfs2_unlink(struct inode *dir,
798 struct dentry *dentry)
799 {
800 int status;
801 int child_locked = 0;
802 struct inode *inode = dentry->d_inode;
803 struct inode *orphan_dir = NULL;
804 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
805 u64 blkno;
806 struct ocfs2_dinode *fe = NULL;
807 struct buffer_head *fe_bh = NULL;
808 struct buffer_head *parent_node_bh = NULL;
809 handle_t *handle = NULL;
810 struct ocfs2_dir_entry *dirent = NULL;
811 struct buffer_head *dirent_bh = NULL;
812 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
813 struct buffer_head *orphan_entry_bh = NULL;
814
815 mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
816 dentry->d_name.len, dentry->d_name.name);
817
818 BUG_ON(dentry->d_parent->d_inode != dir);
819
820 mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno);
821
822 if (inode == osb->root_inode) {
823 mlog(0, "Cannot delete the root directory\n");
824 return -EPERM;
825 }
826
827 status = ocfs2_meta_lock(dir, &parent_node_bh, 1);
828 if (status < 0) {
829 if (status != -ENOENT)
830 mlog_errno(status);
831 return status;
832 }
833
834 status = ocfs2_find_files_on_disk(dentry->d_name.name,
835 dentry->d_name.len, &blkno,
836 dir, &dirent_bh, &dirent);
837 if (status < 0) {
838 if (status != -ENOENT)
839 mlog_errno(status);
840 goto leave;
841 }
842
843 if (OCFS2_I(inode)->ip_blkno != blkno) {
844 status = -ENOENT;
845
846 mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n",
847 (unsigned long long)OCFS2_I(inode)->ip_blkno,
848 (unsigned long long)blkno, OCFS2_I(inode)->ip_flags);
849 goto leave;
850 }
851
852 status = ocfs2_meta_lock(inode, &fe_bh, 1);
853 if (status < 0) {
854 if (status != -ENOENT)
855 mlog_errno(status);
856 goto leave;
857 }
858 child_locked = 1;
859
860 if (S_ISDIR(inode->i_mode)) {
861 if (!ocfs2_empty_dir(inode)) {
862 status = -ENOTEMPTY;
863 goto leave;
864 } else if (inode->i_nlink != 2) {
865 status = -ENOTEMPTY;
866 goto leave;
867 }
868 }
869
870 status = ocfs2_remote_dentry_delete(dentry);
871 if (status < 0) {
872 /* This vote 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, inode,
880 orphan_name,
881 &orphan_entry_bh);
882 if (status < 0) {
883 mlog_errno(status);
884 goto leave;
885 }
886 }
887
888 handle = ocfs2_start_trans(osb, OCFS2_UNLINK_CREDITS);
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(handle, 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, orphan_name,
907 orphan_entry_bh, 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, dirent, dirent_bh);
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 fe->i_links_count = cpu_to_le16(inode->i_nlink);
925
926 status = ocfs2_journal_dirty(handle, fe_bh);
927 if (status < 0) {
928 mlog_errno(status);
929 goto leave;
930 }
931
932 dir->i_ctime = dir->i_mtime = CURRENT_TIME;
933 if (S_ISDIR(inode->i_mode))
934 drop_nlink(dir);
935
936 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
937 if (status < 0) {
938 mlog_errno(status);
939 if (S_ISDIR(inode->i_mode))
940 inc_nlink(dir);
941 }
942
943 leave:
944 if (handle)
945 ocfs2_commit_trans(osb, handle);
946
947 if (child_locked)
948 ocfs2_meta_unlock(inode, 1);
949
950 ocfs2_meta_unlock(dir, 1);
951
952 if (orphan_dir) {
953 /* This was locked for us in ocfs2_prepare_orphan_dir() */
954 ocfs2_meta_unlock(orphan_dir, 1);
955 mutex_unlock(&orphan_dir->i_mutex);
956 iput(orphan_dir);
957 }
958
959 if (fe_bh)
960 brelse(fe_bh);
961
962 if (dirent_bh)
963 brelse(dirent_bh);
964
965 if (parent_node_bh)
966 brelse(parent_node_bh);
967
968 if (orphan_entry_bh)
969 brelse(orphan_entry_bh);
970
971 mlog_exit(status);
972
973 return status;
974 }
975
976 /*
977 * The only place this should be used is rename!
978 * if they have the same id, then the 1st one is the only one locked.
979 */
980 static int ocfs2_double_lock(struct ocfs2_super *osb,
981 struct buffer_head **bh1,
982 struct inode *inode1,
983 struct buffer_head **bh2,
984 struct inode *inode2)
985 {
986 int status;
987 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
988 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
989 struct buffer_head **tmpbh;
990 struct inode *tmpinode;
991
992 mlog_entry("(inode1 = %llu, inode2 = %llu)\n",
993 (unsigned long long)oi1->ip_blkno,
994 (unsigned long long)oi2->ip_blkno);
995
996 if (*bh1)
997 *bh1 = NULL;
998 if (*bh2)
999 *bh2 = NULL;
1000
1001 /* we always want to lock the one with the lower lockid first. */
1002 if (oi1->ip_blkno != oi2->ip_blkno) {
1003 if (oi1->ip_blkno < oi2->ip_blkno) {
1004 /* switch id1 and id2 around */
1005 mlog(0, "switching them around...\n");
1006 tmpbh = bh2;
1007 bh2 = bh1;
1008 bh1 = tmpbh;
1009
1010 tmpinode = inode2;
1011 inode2 = inode1;
1012 inode1 = tmpinode;
1013 }
1014 /* lock id2 */
1015 status = ocfs2_meta_lock(inode2, bh2, 1);
1016 if (status < 0) {
1017 if (status != -ENOENT)
1018 mlog_errno(status);
1019 goto bail;
1020 }
1021 }
1022
1023 /* lock id1 */
1024 status = ocfs2_meta_lock(inode1, bh1, 1);
1025 if (status < 0) {
1026 /*
1027 * An error return must mean that no cluster locks
1028 * were held on function exit.
1029 */
1030 if (oi1->ip_blkno != oi2->ip_blkno)
1031 ocfs2_meta_unlock(inode2, 1);
1032
1033 if (status != -ENOENT)
1034 mlog_errno(status);
1035 }
1036
1037 bail:
1038 mlog_exit(status);
1039 return status;
1040 }
1041
1042 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1043 {
1044 ocfs2_meta_unlock(inode1, 1);
1045
1046 if (inode1 != inode2)
1047 ocfs2_meta_unlock(inode2, 1);
1048 }
1049
1050 #define PARENT_INO(buffer) \
1051 ((struct ocfs2_dir_entry *) \
1052 ((char *)buffer + \
1053 le16_to_cpu(((struct ocfs2_dir_entry *)buffer)->rec_len)))->inode
1054
1055 static int ocfs2_rename(struct inode *old_dir,
1056 struct dentry *old_dentry,
1057 struct inode *new_dir,
1058 struct dentry *new_dentry)
1059 {
1060 int status = 0, rename_lock = 0, parents_locked = 0;
1061 int old_child_locked = 0, new_child_locked = 0;
1062 struct inode *old_inode = old_dentry->d_inode;
1063 struct inode *new_inode = new_dentry->d_inode;
1064 struct inode *orphan_dir = NULL;
1065 struct ocfs2_dinode *newfe = NULL;
1066 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1067 struct buffer_head *orphan_entry_bh = NULL;
1068 struct buffer_head *newfe_bh = NULL;
1069 struct buffer_head *old_inode_bh = NULL;
1070 struct buffer_head *insert_entry_bh = NULL;
1071 struct ocfs2_super *osb = NULL;
1072 u64 newfe_blkno;
1073 handle_t *handle = NULL;
1074 struct buffer_head *old_dir_bh = NULL;
1075 struct buffer_head *new_dir_bh = NULL;
1076 struct ocfs2_dir_entry *old_de = NULL, *new_de = NULL; // dirent for old_dentry
1077 // and new_dentry
1078 struct buffer_head *new_de_bh = NULL, *old_de_bh = NULL; // bhs for above
1079 struct buffer_head *old_inode_de_bh = NULL; // if old_dentry is a dir,
1080 // this is the 1st dirent bh
1081 nlink_t old_dir_nlink = old_dir->i_nlink;
1082
1083 /* At some point it might be nice to break this function up a
1084 * bit. */
1085
1086 mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n",
1087 old_dir, old_dentry, new_dir, new_dentry,
1088 old_dentry->d_name.len, old_dentry->d_name.name,
1089 new_dentry->d_name.len, new_dentry->d_name.name);
1090
1091 osb = OCFS2_SB(old_dir->i_sb);
1092
1093 if (new_inode) {
1094 if (!igrab(new_inode))
1095 BUG();
1096 }
1097
1098 /* Assume a directory hierarchy thusly:
1099 * a/b/c
1100 * a/d
1101 * a,b,c, and d are all directories.
1102 *
1103 * from cwd of 'a' on both nodes:
1104 * node1: mv b/c d
1105 * node2: mv d b/c
1106 *
1107 * And that's why, just like the VFS, we need a file system
1108 * rename lock. */
1109 if (old_dentry != new_dentry) {
1110 status = ocfs2_rename_lock(osb);
1111 if (status < 0) {
1112 mlog_errno(status);
1113 goto bail;
1114 }
1115 rename_lock = 1;
1116 }
1117
1118 /* if old and new are the same, this'll just do one lock. */
1119 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1120 &new_dir_bh, new_dir);
1121 if (status < 0) {
1122 mlog_errno(status);
1123 goto bail;
1124 }
1125 parents_locked = 1;
1126
1127 /* make sure both dirs have bhs
1128 * get an extra ref on old_dir_bh if old==new */
1129 if (!new_dir_bh) {
1130 if (old_dir_bh) {
1131 new_dir_bh = old_dir_bh;
1132 get_bh(new_dir_bh);
1133 } else {
1134 mlog(ML_ERROR, "no old_dir_bh!\n");
1135 status = -EIO;
1136 goto bail;
1137 }
1138 }
1139
1140 /*
1141 * Aside from allowing a meta data update, the locking here
1142 * also ensures that the vote thread on other nodes won't have
1143 * to concurrently downconvert the inode and the dentry locks.
1144 */
1145 status = ocfs2_meta_lock(old_inode, &old_inode_bh, 1);
1146 if (status < 0) {
1147 if (status != -ENOENT)
1148 mlog_errno(status);
1149 goto bail;
1150 }
1151 old_child_locked = 1;
1152
1153 status = ocfs2_remote_dentry_delete(old_dentry);
1154 if (status < 0) {
1155 mlog_errno(status);
1156 goto bail;
1157 }
1158
1159 if (S_ISDIR(old_inode->i_mode)) {
1160 status = -EIO;
1161 old_inode_de_bh = ocfs2_bread(old_inode, 0, &status, 0);
1162 if (!old_inode_de_bh)
1163 goto bail;
1164
1165 status = -EIO;
1166 if (le64_to_cpu(PARENT_INO(old_inode_de_bh->b_data)) !=
1167 OCFS2_I(old_dir)->ip_blkno)
1168 goto bail;
1169 status = -EMLINK;
1170 if (!new_inode && new_dir!=old_dir &&
1171 new_dir->i_nlink >= OCFS2_LINK_MAX)
1172 goto bail;
1173 }
1174
1175 status = -ENOENT;
1176 old_de_bh = ocfs2_find_entry(old_dentry->d_name.name,
1177 old_dentry->d_name.len,
1178 old_dir, &old_de);
1179 if (!old_de_bh)
1180 goto bail;
1181
1182 /*
1183 * Check for inode number is _not_ due to possible IO errors.
1184 * We might rmdir the source, keep it as pwd of some process
1185 * and merrily kill the link to whatever was created under the
1186 * same name. Goodbye sticky bit ;-<
1187 */
1188 if (le64_to_cpu(old_de->inode) != OCFS2_I(old_inode)->ip_blkno)
1189 goto bail;
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, &new_de_bh,
1196 &new_de);
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
1206 if (!new_de && new_inode)
1207 mlog(ML_ERROR, "inode %lu does not exist in it's parent "
1208 "directory!", new_inode->i_ino);
1209
1210 /* In case we need to overwrite an existing file, we blow it
1211 * away first */
1212 if (new_de) {
1213 /* VFS didn't think there existed an inode here, but
1214 * someone else in the cluster must have raced our
1215 * rename to create one. Today we error cleanly, in
1216 * the future we should consider calling iget to build
1217 * a new struct inode for this entry. */
1218 if (!new_inode) {
1219 status = -EACCES;
1220
1221 mlog(0, "We found an inode for name %.*s but VFS "
1222 "didn't give us one.\n", new_dentry->d_name.len,
1223 new_dentry->d_name.name);
1224 goto bail;
1225 }
1226
1227 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1228 status = -EACCES;
1229
1230 mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n",
1231 (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1232 (unsigned long long)newfe_blkno,
1233 OCFS2_I(new_inode)->ip_flags);
1234 goto bail;
1235 }
1236
1237 status = ocfs2_meta_lock(new_inode, &newfe_bh, 1);
1238 if (status < 0) {
1239 if (status != -ENOENT)
1240 mlog_errno(status);
1241 goto bail;
1242 }
1243 new_child_locked = 1;
1244
1245 status = ocfs2_remote_dentry_delete(new_dentry);
1246 if (status < 0) {
1247 mlog_errno(status);
1248 goto bail;
1249 }
1250
1251 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1252
1253 mlog(0, "aha rename over existing... new_de=%p new_blkno=%llu "
1254 "newfebh=%p bhblocknr=%llu\n", new_de,
1255 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1256 (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1257
1258 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1259 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1260 new_inode,
1261 orphan_name,
1262 &orphan_entry_bh);
1263 if (status < 0) {
1264 mlog_errno(status);
1265 goto bail;
1266 }
1267 }
1268 } else {
1269 BUG_ON(new_dentry->d_parent->d_inode != new_dir);
1270
1271 status = ocfs2_check_dir_for_entry(new_dir,
1272 new_dentry->d_name.name,
1273 new_dentry->d_name.len);
1274 if (status)
1275 goto bail;
1276
1277 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1278 new_dentry->d_name.name,
1279 new_dentry->d_name.len,
1280 &insert_entry_bh);
1281 if (status < 0) {
1282 mlog_errno(status);
1283 goto bail;
1284 }
1285 }
1286
1287 handle = ocfs2_start_trans(osb, OCFS2_RENAME_CREDITS);
1288 if (IS_ERR(handle)) {
1289 status = PTR_ERR(handle);
1290 handle = NULL;
1291 mlog_errno(status);
1292 goto bail;
1293 }
1294
1295 if (new_de) {
1296 if (S_ISDIR(new_inode->i_mode)) {
1297 if (!ocfs2_empty_dir(new_inode) ||
1298 new_inode->i_nlink != 2) {
1299 status = -ENOTEMPTY;
1300 goto bail;
1301 }
1302 }
1303 status = ocfs2_journal_access(handle, new_inode, newfe_bh,
1304 OCFS2_JOURNAL_ACCESS_WRITE);
1305 if (status < 0) {
1306 mlog_errno(status);
1307 goto bail;
1308 }
1309
1310 if (S_ISDIR(new_inode->i_mode) ||
1311 (newfe->i_links_count == cpu_to_le16(1))){
1312 status = ocfs2_orphan_add(osb, handle, new_inode,
1313 newfe, orphan_name,
1314 orphan_entry_bh, orphan_dir);
1315 if (status < 0) {
1316 mlog_errno(status);
1317 goto bail;
1318 }
1319 }
1320
1321 /* change the dirent to point to the correct inode */
1322 status = ocfs2_journal_access(handle, new_dir, new_de_bh,
1323 OCFS2_JOURNAL_ACCESS_WRITE);
1324 if (status < 0) {
1325 mlog_errno(status);
1326 goto bail;
1327 }
1328 new_de->inode = cpu_to_le64(OCFS2_I(old_inode)->ip_blkno);
1329 new_de->file_type = old_de->file_type;
1330 new_dir->i_version++;
1331 status = ocfs2_journal_dirty(handle, new_de_bh);
1332 if (status < 0) {
1333 mlog_errno(status);
1334 goto bail;
1335 }
1336
1337 if (S_ISDIR(new_inode->i_mode))
1338 newfe->i_links_count = 0;
1339 else
1340 le16_add_cpu(&newfe->i_links_count, -1);
1341
1342 status = ocfs2_journal_dirty(handle, newfe_bh);
1343 if (status < 0) {
1344 mlog_errno(status);
1345 goto bail;
1346 }
1347 } else {
1348 /* if the name was not found in new_dir, add it now */
1349 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1350 OCFS2_I(old_inode)->ip_blkno,
1351 new_dir_bh, insert_entry_bh);
1352 }
1353
1354 old_inode->i_ctime = CURRENT_TIME;
1355 mark_inode_dirty(old_inode);
1356 ocfs2_mark_inode_dirty(handle, old_inode, old_inode_bh);
1357
1358 /* now that the name has been added to new_dir, remove the old name */
1359 status = ocfs2_delete_entry(handle, old_dir, old_de, old_de_bh);
1360 if (status < 0) {
1361 mlog_errno(status);
1362 goto bail;
1363 }
1364
1365 if (new_inode) {
1366 new_inode->i_nlink--;
1367 new_inode->i_ctime = CURRENT_TIME;
1368 }
1369 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1370 if (old_inode_de_bh) {
1371 status = ocfs2_journal_access(handle, old_inode,
1372 old_inode_de_bh,
1373 OCFS2_JOURNAL_ACCESS_WRITE);
1374 PARENT_INO(old_inode_de_bh->b_data) =
1375 cpu_to_le64(OCFS2_I(new_dir)->ip_blkno);
1376 status = ocfs2_journal_dirty(handle, old_inode_de_bh);
1377 old_dir->i_nlink--;
1378 if (new_inode) {
1379 new_inode->i_nlink--;
1380 } else {
1381 inc_nlink(new_dir);
1382 mark_inode_dirty(new_dir);
1383 }
1384 }
1385 mark_inode_dirty(old_dir);
1386 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1387 if (new_inode) {
1388 mark_inode_dirty(new_inode);
1389 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1390 }
1391
1392 if (old_dir != new_dir) {
1393 /* Keep the same times on both directories.*/
1394 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1395
1396 /*
1397 * This will also pick up the i_nlink change from the
1398 * block above.
1399 */
1400 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1401 }
1402
1403 if (old_dir_nlink != old_dir->i_nlink) {
1404 if (!old_dir_bh) {
1405 mlog(ML_ERROR, "need to change nlink for old dir "
1406 "%llu from %d to %d but bh is NULL!\n",
1407 (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1408 (int)old_dir_nlink, old_dir->i_nlink);
1409 } else {
1410 struct ocfs2_dinode *fe;
1411 status = ocfs2_journal_access(handle, old_dir,
1412 old_dir_bh,
1413 OCFS2_JOURNAL_ACCESS_WRITE);
1414 fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1415 fe->i_links_count = cpu_to_le16(old_dir->i_nlink);
1416 status = ocfs2_journal_dirty(handle, old_dir_bh);
1417 }
1418 }
1419
1420 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1421 status = 0;
1422 bail:
1423 if (rename_lock)
1424 ocfs2_rename_unlock(osb);
1425
1426 if (handle)
1427 ocfs2_commit_trans(osb, handle);
1428
1429 if (parents_locked)
1430 ocfs2_double_unlock(old_dir, new_dir);
1431
1432 if (old_child_locked)
1433 ocfs2_meta_unlock(old_inode, 1);
1434
1435 if (new_child_locked)
1436 ocfs2_meta_unlock(new_inode, 1);
1437
1438 if (orphan_dir) {
1439 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1440 ocfs2_meta_unlock(orphan_dir, 1);
1441 mutex_unlock(&orphan_dir->i_mutex);
1442 iput(orphan_dir);
1443 }
1444
1445 if (new_inode)
1446 sync_mapping_buffers(old_inode->i_mapping);
1447
1448 if (new_inode)
1449 iput(new_inode);
1450 if (newfe_bh)
1451 brelse(newfe_bh);
1452 if (old_inode_bh)
1453 brelse(old_inode_bh);
1454 if (old_dir_bh)
1455 brelse(old_dir_bh);
1456 if (new_dir_bh)
1457 brelse(new_dir_bh);
1458 if (new_de_bh)
1459 brelse(new_de_bh);
1460 if (old_de_bh)
1461 brelse(old_de_bh);
1462 if (old_inode_de_bh)
1463 brelse(old_inode_de_bh);
1464 if (orphan_entry_bh)
1465 brelse(orphan_entry_bh);
1466 if (insert_entry_bh)
1467 brelse(insert_entry_bh);
1468
1469 mlog_exit(status);
1470
1471 return status;
1472 }
1473
1474 /*
1475 * we expect i_size = strlen(symname). Copy symname into the file
1476 * data, including the null terminator.
1477 */
1478 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1479 handle_t *handle,
1480 struct inode *inode,
1481 const char *symname)
1482 {
1483 struct buffer_head **bhs = NULL;
1484 const char *c;
1485 struct super_block *sb = osb->sb;
1486 u64 p_blkno;
1487 int p_blocks;
1488 int virtual, blocks, status, i, bytes_left;
1489
1490 bytes_left = i_size_read(inode) + 1;
1491 /* we can't trust i_blocks because we're actually going to
1492 * write i_size + 1 bytes. */
1493 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1494
1495 mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n",
1496 (unsigned long long)inode->i_blocks,
1497 i_size_read(inode), blocks);
1498
1499 /* Sanity check -- make sure we're going to fit. */
1500 if (bytes_left >
1501 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1502 status = -EIO;
1503 mlog_errno(status);
1504 goto bail;
1505 }
1506
1507 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1508 if (!bhs) {
1509 status = -ENOMEM;
1510 mlog_errno(status);
1511 goto bail;
1512 }
1513
1514 status = ocfs2_extent_map_get_blocks(inode, 0, 1, &p_blkno,
1515 &p_blocks);
1516 if (status < 0) {
1517 mlog_errno(status);
1518 goto bail;
1519 }
1520
1521 /* links can never be larger than one cluster so we know this
1522 * is all going to be contiguous, but do a sanity check
1523 * anyway. */
1524 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1525 status = -EIO;
1526 mlog_errno(status);
1527 goto bail;
1528 }
1529
1530 virtual = 0;
1531 while(bytes_left > 0) {
1532 c = &symname[virtual * sb->s_blocksize];
1533
1534 bhs[virtual] = sb_getblk(sb, p_blkno);
1535 if (!bhs[virtual]) {
1536 status = -ENOMEM;
1537 mlog_errno(status);
1538 goto bail;
1539 }
1540 ocfs2_set_new_buffer_uptodate(inode, bhs[virtual]);
1541
1542 status = ocfs2_journal_access(handle, inode, bhs[virtual],
1543 OCFS2_JOURNAL_ACCESS_CREATE);
1544 if (status < 0) {
1545 mlog_errno(status);
1546 goto bail;
1547 }
1548
1549 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1550
1551 memcpy(bhs[virtual]->b_data, c,
1552 (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1553 bytes_left);
1554
1555 status = ocfs2_journal_dirty(handle, bhs[virtual]);
1556 if (status < 0) {
1557 mlog_errno(status);
1558 goto bail;
1559 }
1560
1561 virtual++;
1562 p_blkno++;
1563 bytes_left -= sb->s_blocksize;
1564 }
1565
1566 status = 0;
1567 bail:
1568
1569 if (bhs) {
1570 for(i = 0; i < blocks; i++)
1571 if (bhs[i])
1572 brelse(bhs[i]);
1573 kfree(bhs);
1574 }
1575
1576 mlog_exit(status);
1577 return status;
1578 }
1579
1580 static int ocfs2_symlink(struct inode *dir,
1581 struct dentry *dentry,
1582 const char *symname)
1583 {
1584 int status, l, credits;
1585 u64 newsize;
1586 struct ocfs2_super *osb = NULL;
1587 struct inode *inode = NULL;
1588 struct super_block *sb;
1589 struct buffer_head *new_fe_bh = NULL;
1590 struct buffer_head *de_bh = NULL;
1591 struct buffer_head *parent_fe_bh = NULL;
1592 struct ocfs2_dinode *fe = NULL;
1593 struct ocfs2_dinode *dirfe;
1594 handle_t *handle = NULL;
1595 struct ocfs2_alloc_context *inode_ac = NULL;
1596 struct ocfs2_alloc_context *data_ac = NULL;
1597
1598 mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir,
1599 dentry, symname, dentry->d_name.len, dentry->d_name.name);
1600
1601 sb = dir->i_sb;
1602 osb = OCFS2_SB(sb);
1603
1604 l = strlen(symname) + 1;
1605
1606 credits = ocfs2_calc_symlink_credits(sb);
1607
1608 /* lock the parent directory */
1609 status = ocfs2_meta_lock(dir, &parent_fe_bh, 1);
1610 if (status < 0) {
1611 if (status != -ENOENT)
1612 mlog_errno(status);
1613 return status;
1614 }
1615
1616 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1617 if (!dirfe->i_links_count) {
1618 /* can't make a file in a deleted directory. */
1619 status = -ENOENT;
1620 goto bail;
1621 }
1622
1623 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1624 dentry->d_name.len);
1625 if (status)
1626 goto bail;
1627
1628 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1629 dentry->d_name.name,
1630 dentry->d_name.len, &de_bh);
1631 if (status < 0) {
1632 mlog_errno(status);
1633 goto bail;
1634 }
1635
1636 status = ocfs2_reserve_new_inode(osb, &inode_ac);
1637 if (status < 0) {
1638 if (status != -ENOSPC)
1639 mlog_errno(status);
1640 goto bail;
1641 }
1642
1643 /* don't reserve bitmap space for fast symlinks. */
1644 if (l > ocfs2_fast_symlink_chars(sb)) {
1645 status = ocfs2_reserve_clusters(osb, 1, &data_ac);
1646 if (status < 0) {
1647 if (status != -ENOSPC)
1648 mlog_errno(status);
1649 goto bail;
1650 }
1651 }
1652
1653 handle = ocfs2_start_trans(osb, credits);
1654 if (IS_ERR(handle)) {
1655 status = PTR_ERR(handle);
1656 handle = NULL;
1657 mlog_errno(status);
1658 goto bail;
1659 }
1660
1661 status = ocfs2_mknod_locked(osb, dir, dentry,
1662 S_IFLNK | S_IRWXUGO, 0,
1663 &new_fe_bh, parent_fe_bh, handle,
1664 &inode, inode_ac);
1665 if (status < 0) {
1666 mlog_errno(status);
1667 goto bail;
1668 }
1669
1670 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1671 inode->i_rdev = 0;
1672 newsize = l - 1;
1673 if (l > ocfs2_fast_symlink_chars(sb)) {
1674 inode->i_op = &ocfs2_symlink_inode_operations;
1675 status = ocfs2_do_extend_allocation(osb, inode, 1, new_fe_bh,
1676 handle, data_ac, NULL,
1677 NULL);
1678 if (status < 0) {
1679 if (status != -ENOSPC && status != -EINTR) {
1680 mlog(ML_ERROR,
1681 "Failed to extend file to %llu\n",
1682 (unsigned long long)newsize);
1683 mlog_errno(status);
1684 status = -ENOSPC;
1685 }
1686 goto bail;
1687 }
1688 i_size_write(inode, newsize);
1689 inode->i_blocks = ocfs2_align_bytes_to_sectors(newsize);
1690 } else {
1691 inode->i_op = &ocfs2_fast_symlink_inode_operations;
1692 memcpy((char *) fe->id2.i_symlink, symname, l);
1693 i_size_write(inode, newsize);
1694 inode->i_blocks = 0;
1695 }
1696
1697 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1698 if (status < 0) {
1699 mlog_errno(status);
1700 goto bail;
1701 }
1702
1703 if (!ocfs2_inode_is_fast_symlink(inode)) {
1704 status = ocfs2_create_symlink_data(osb, handle, inode,
1705 symname);
1706 if (status < 0) {
1707 mlog_errno(status);
1708 goto bail;
1709 }
1710 }
1711
1712 status = ocfs2_add_entry(handle, dentry, inode,
1713 le64_to_cpu(fe->i_blkno), parent_fe_bh,
1714 de_bh);
1715 if (status < 0) {
1716 mlog_errno(status);
1717 goto bail;
1718 }
1719
1720 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1721 if (status) {
1722 mlog_errno(status);
1723 goto bail;
1724 }
1725
1726 insert_inode_hash(inode);
1727 dentry->d_op = &ocfs2_dentry_ops;
1728 d_instantiate(dentry, inode);
1729 bail:
1730 if (handle)
1731 ocfs2_commit_trans(osb, handle);
1732
1733 ocfs2_meta_unlock(dir, 1);
1734
1735 if (new_fe_bh)
1736 brelse(new_fe_bh);
1737 if (parent_fe_bh)
1738 brelse(parent_fe_bh);
1739 if (de_bh)
1740 brelse(de_bh);
1741 if (inode_ac)
1742 ocfs2_free_alloc_context(inode_ac);
1743 if (data_ac)
1744 ocfs2_free_alloc_context(data_ac);
1745 if ((status < 0) && inode)
1746 iput(inode);
1747
1748 mlog_exit(status);
1749
1750 return status;
1751 }
1752
1753 int ocfs2_check_dir_entry(struct inode * dir,
1754 struct ocfs2_dir_entry * de,
1755 struct buffer_head * bh,
1756 unsigned long offset)
1757 {
1758 const char *error_msg = NULL;
1759 const int rlen = le16_to_cpu(de->rec_len);
1760
1761 if (rlen < OCFS2_DIR_REC_LEN(1))
1762 error_msg = "rec_len is smaller than minimal";
1763 else if (rlen % 4 != 0)
1764 error_msg = "rec_len % 4 != 0";
1765 else if (rlen < OCFS2_DIR_REC_LEN(de->name_len))
1766 error_msg = "rec_len is too small for name_len";
1767 else if (((char *) de - bh->b_data) + rlen > dir->i_sb->s_blocksize)
1768 error_msg = "directory entry across blocks";
1769
1770 if (error_msg != NULL)
1771 mlog(ML_ERROR, "bad entry in directory #%llu: %s - "
1772 "offset=%lu, inode=%llu, rec_len=%d, name_len=%d\n",
1773 (unsigned long long)OCFS2_I(dir)->ip_blkno, error_msg,
1774 offset, (unsigned long long)le64_to_cpu(de->inode), rlen,
1775 de->name_len);
1776 return error_msg == NULL ? 1 : 0;
1777 }
1778
1779 /* we don't always have a dentry for what we want to add, so people
1780 * like orphan dir can call this instead.
1781 *
1782 * If you pass me insert_bh, I'll skip the search of the other dir
1783 * blocks and put the record in there.
1784 */
1785 static int __ocfs2_add_entry(handle_t *handle,
1786 struct inode *dir,
1787 const char *name, int namelen,
1788 struct inode *inode, u64 blkno,
1789 struct buffer_head *parent_fe_bh,
1790 struct buffer_head *insert_bh)
1791 {
1792 unsigned long offset;
1793 unsigned short rec_len;
1794 struct ocfs2_dir_entry *de, *de1;
1795 struct super_block *sb;
1796 int retval, status;
1797
1798 mlog_entry_void();
1799
1800 sb = dir->i_sb;
1801
1802 if (!namelen)
1803 return -EINVAL;
1804
1805 rec_len = OCFS2_DIR_REC_LEN(namelen);
1806 offset = 0;
1807 de = (struct ocfs2_dir_entry *) insert_bh->b_data;
1808 while (1) {
1809 BUG_ON((char *)de >= sb->s_blocksize + insert_bh->b_data);
1810 /* These checks should've already been passed by the
1811 * prepare function, but I guess we can leave them
1812 * here anyway. */
1813 if (!ocfs2_check_dir_entry(dir, de, insert_bh, offset)) {
1814 retval = -ENOENT;
1815 goto bail;
1816 }
1817 if (ocfs2_match(namelen, name, de)) {
1818 retval = -EEXIST;
1819 goto bail;
1820 }
1821 if (((le64_to_cpu(de->inode) == 0) &&
1822 (le16_to_cpu(de->rec_len) >= rec_len)) ||
1823 (le16_to_cpu(de->rec_len) >=
1824 (OCFS2_DIR_REC_LEN(de->name_len) + rec_len))) {
1825 dir->i_mtime = dir->i_ctime = CURRENT_TIME;
1826 retval = ocfs2_mark_inode_dirty(handle, dir, parent_fe_bh);
1827 if (retval < 0) {
1828 mlog_errno(retval);
1829 goto bail;
1830 }
1831
1832 status = ocfs2_journal_access(handle, dir, insert_bh,
1833 OCFS2_JOURNAL_ACCESS_WRITE);
1834 /* By now the buffer is marked for journaling */
1835 offset += le16_to_cpu(de->rec_len);
1836 if (le64_to_cpu(de->inode)) {
1837 de1 = (struct ocfs2_dir_entry *)((char *) de +
1838 OCFS2_DIR_REC_LEN(de->name_len));
1839 de1->rec_len =
1840 cpu_to_le16(le16_to_cpu(de->rec_len) -
1841 OCFS2_DIR_REC_LEN(de->name_len));
1842 de->rec_len = cpu_to_le16(OCFS2_DIR_REC_LEN(de->name_len));
1843 de = de1;
1844 }
1845 de->file_type = OCFS2_FT_UNKNOWN;
1846 if (blkno) {
1847 de->inode = cpu_to_le64(blkno);
1848 ocfs2_set_de_type(de, inode->i_mode);
1849 } else
1850 de->inode = 0;
1851 de->name_len = namelen;
1852 memcpy(de->name, name, namelen);
1853
1854 dir->i_version++;
1855 status = ocfs2_journal_dirty(handle, insert_bh);
1856 retval = 0;
1857 goto bail;
1858 }
1859 offset += le16_to_cpu(de->rec_len);
1860 de = (struct ocfs2_dir_entry *) ((char *) de + le16_to_cpu(de->rec_len));
1861 }
1862
1863 /* when you think about it, the assert above should prevent us
1864 * from ever getting here. */
1865 retval = -ENOSPC;
1866 bail:
1867
1868 mlog_exit(retval);
1869 return retval;
1870 }
1871
1872
1873 /*
1874 * ocfs2_delete_entry deletes a directory entry by merging it with the
1875 * previous entry
1876 */
1877 static int ocfs2_delete_entry(handle_t *handle,
1878 struct inode *dir,
1879 struct ocfs2_dir_entry *de_del,
1880 struct buffer_head *bh)
1881 {
1882 struct ocfs2_dir_entry *de, *pde;
1883 int i, status = -ENOENT;
1884
1885 mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p)\n", handle, dir, de_del, bh);
1886
1887 i = 0;
1888 pde = NULL;
1889 de = (struct ocfs2_dir_entry *) bh->b_data;
1890 while (i < bh->b_size) {
1891 if (!ocfs2_check_dir_entry(dir, de, bh, i)) {
1892 status = -EIO;
1893 mlog_errno(status);
1894 goto bail;
1895 }
1896 if (de == de_del) {
1897 status = ocfs2_journal_access(handle, dir, bh,
1898 OCFS2_JOURNAL_ACCESS_WRITE);
1899 if (status < 0) {
1900 status = -EIO;
1901 mlog_errno(status);
1902 goto bail;
1903 }
1904 if (pde)
1905 pde->rec_len =
1906 cpu_to_le16(le16_to_cpu(pde->rec_len) +
1907 le16_to_cpu(de->rec_len));
1908 else
1909 de->inode = 0;
1910 dir->i_version++;
1911 status = ocfs2_journal_dirty(handle, bh);
1912 goto bail;
1913 }
1914 i += le16_to_cpu(de->rec_len);
1915 pde = de;
1916 de = (struct ocfs2_dir_entry *)((char *)de + le16_to_cpu(de->rec_len));
1917 }
1918 bail:
1919 mlog_exit(status);
1920 return status;
1921 }
1922
1923 /*
1924 * Returns 0 if not found, -1 on failure, and 1 on success
1925 */
1926 static int inline ocfs2_search_dirblock(struct buffer_head *bh,
1927 struct inode *dir,
1928 const char *name, int namelen,
1929 unsigned long offset,
1930 struct ocfs2_dir_entry **res_dir)
1931 {
1932 struct ocfs2_dir_entry *de;
1933 char *dlimit, *de_buf;
1934 int de_len;
1935 int ret = 0;
1936
1937 mlog_entry_void();
1938
1939 de_buf = bh->b_data;
1940 dlimit = de_buf + dir->i_sb->s_blocksize;
1941
1942 while (de_buf < dlimit) {
1943 /* this code is executed quadratically often */
1944 /* do minimal checking `by hand' */
1945
1946 de = (struct ocfs2_dir_entry *) de_buf;
1947
1948 if (de_buf + namelen <= dlimit &&
1949 ocfs2_match(namelen, name, de)) {
1950 /* found a match - just to be sure, do a full check */
1951 if (!ocfs2_check_dir_entry(dir, de, bh, offset)) {
1952 ret = -1;
1953 goto bail;
1954 }
1955 *res_dir = de;
1956 ret = 1;
1957 goto bail;
1958 }
1959
1960 /* prevent looping on a bad block */
1961 de_len = le16_to_cpu(de->rec_len);
1962 if (de_len <= 0) {
1963 ret = -1;
1964 goto bail;
1965 }
1966
1967 de_buf += de_len;
1968 offset += de_len;
1969 }
1970
1971 bail:
1972 mlog_exit(ret);
1973 return ret;
1974 }
1975
1976 struct buffer_head *ocfs2_find_entry(const char *name, int namelen,
1977 struct inode *dir,
1978 struct ocfs2_dir_entry **res_dir)
1979 {
1980 struct super_block *sb;
1981 struct buffer_head *bh_use[NAMEI_RA_SIZE];
1982 struct buffer_head *bh, *ret = NULL;
1983 unsigned long start, block, b;
1984 int ra_max = 0; /* Number of bh's in the readahead
1985 buffer, bh_use[] */
1986 int ra_ptr = 0; /* Current index into readahead
1987 buffer */
1988 int num = 0;
1989 int nblocks, i, err;
1990
1991 mlog_entry_void();
1992
1993 *res_dir = NULL;
1994 sb = dir->i_sb;
1995
1996 nblocks = i_size_read(dir) >> sb->s_blocksize_bits;
1997 start = OCFS2_I(dir)->ip_dir_start_lookup;
1998 if (start >= nblocks)
1999 start = 0;
2000 block = start;
2001
2002 restart:
2003 do {
2004 /*
2005 * We deal with the read-ahead logic here.
2006 */
2007 if (ra_ptr >= ra_max) {
2008 /* Refill the readahead buffer */
2009 ra_ptr = 0;
2010 b = block;
2011 for (ra_max = 0; ra_max < NAMEI_RA_SIZE; ra_max++) {
2012 /*
2013 * Terminate if we reach the end of the
2014 * directory and must wrap, or if our
2015 * search has finished at this block.
2016 */
2017 if (b >= nblocks || (num && block == start)) {
2018 bh_use[ra_max] = NULL;
2019 break;
2020 }
2021 num++;
2022
2023 bh = ocfs2_bread(dir, b++, &err, 1);
2024 bh_use[ra_max] = bh;
2025 }
2026 }
2027 if ((bh = bh_use[ra_ptr++]) == NULL)
2028 goto next;
2029 wait_on_buffer(bh);
2030 if (!buffer_uptodate(bh)) {
2031 /* read error, skip block & hope for the best */
2032 ocfs2_error(dir->i_sb, "reading directory %llu, "
2033 "offset %lu\n",
2034 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2035 block);
2036 brelse(bh);
2037 goto next;
2038 }
2039 i = ocfs2_search_dirblock(bh, dir, name, namelen,
2040 block << sb->s_blocksize_bits,
2041 res_dir);
2042 if (i == 1) {
2043 OCFS2_I(dir)->ip_dir_start_lookup = block;
2044 ret = bh;
2045 goto cleanup_and_exit;
2046 } else {
2047 brelse(bh);
2048 if (i < 0)
2049 goto cleanup_and_exit;
2050 }
2051 next:
2052 if (++block >= nblocks)
2053 block = 0;
2054 } while (block != start);
2055
2056 /*
2057 * If the directory has grown while we were searching, then
2058 * search the last part of the directory before giving up.
2059 */
2060 block = nblocks;
2061 nblocks = i_size_read(dir) >> sb->s_blocksize_bits;
2062 if (block < nblocks) {
2063 start = 0;
2064 goto restart;
2065 }
2066
2067 cleanup_and_exit:
2068 /* Clean up the read-ahead blocks */
2069 for (; ra_ptr < ra_max; ra_ptr++)
2070 brelse(bh_use[ra_ptr]);
2071
2072 mlog_exit_ptr(ret);
2073 return ret;
2074 }
2075
2076 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2077 {
2078 int status, namelen;
2079
2080 mlog_entry_void();
2081
2082 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2083 (long long)blkno);
2084 if (namelen <= 0) {
2085 if (namelen)
2086 status = namelen;
2087 else
2088 status = -EINVAL;
2089 mlog_errno(status);
2090 goto bail;
2091 }
2092 if (namelen != OCFS2_ORPHAN_NAMELEN) {
2093 status = -EINVAL;
2094 mlog_errno(status);
2095 goto bail;
2096 }
2097
2098 mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name,
2099 namelen);
2100
2101 status = 0;
2102 bail:
2103 mlog_exit(status);
2104 return status;
2105 }
2106
2107 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2108 struct inode **ret_orphan_dir,
2109 struct inode *inode,
2110 char *name,
2111 struct buffer_head **de_bh)
2112 {
2113 struct inode *orphan_dir_inode;
2114 struct buffer_head *orphan_dir_bh = NULL;
2115 int status = 0;
2116
2117 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2118 if (status < 0) {
2119 mlog_errno(status);
2120 return status;
2121 }
2122
2123 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2124 ORPHAN_DIR_SYSTEM_INODE,
2125 osb->slot_num);
2126 if (!orphan_dir_inode) {
2127 status = -ENOENT;
2128 mlog_errno(status);
2129 return status;
2130 }
2131
2132 mutex_lock(&orphan_dir_inode->i_mutex);
2133
2134 status = ocfs2_meta_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2135 if (status < 0) {
2136 mlog_errno(status);
2137 goto leave;
2138 }
2139
2140 status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2141 orphan_dir_bh, name,
2142 OCFS2_ORPHAN_NAMELEN, de_bh);
2143 if (status < 0) {
2144 ocfs2_meta_unlock(orphan_dir_inode, 1);
2145
2146 mlog_errno(status);
2147 goto leave;
2148 }
2149
2150 *ret_orphan_dir = orphan_dir_inode;
2151
2152 leave:
2153 if (status) {
2154 mutex_unlock(&orphan_dir_inode->i_mutex);
2155 iput(orphan_dir_inode);
2156 }
2157
2158 if (orphan_dir_bh)
2159 brelse(orphan_dir_bh);
2160
2161 mlog_exit(status);
2162 return status;
2163 }
2164
2165 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2166 handle_t *handle,
2167 struct inode *inode,
2168 struct ocfs2_dinode *fe,
2169 char *name,
2170 struct buffer_head *de_bh,
2171 struct inode *orphan_dir_inode)
2172 {
2173 struct buffer_head *orphan_dir_bh = NULL;
2174 int status = 0;
2175 struct ocfs2_dinode *orphan_fe;
2176
2177 mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);
2178
2179 status = ocfs2_read_block(osb,
2180 OCFS2_I(orphan_dir_inode)->ip_blkno,
2181 &orphan_dir_bh, OCFS2_BH_CACHED,
2182 orphan_dir_inode);
2183 if (status < 0) {
2184 mlog_errno(status);
2185 goto leave;
2186 }
2187
2188 status = ocfs2_journal_access(handle, orphan_dir_inode, orphan_dir_bh,
2189 OCFS2_JOURNAL_ACCESS_WRITE);
2190 if (status < 0) {
2191 mlog_errno(status);
2192 goto leave;
2193 }
2194
2195 /* we're a cluster, and nlink can change on disk from
2196 * underneath us... */
2197 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2198 if (S_ISDIR(inode->i_mode))
2199 le16_add_cpu(&orphan_fe->i_links_count, 1);
2200 orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count);
2201
2202 status = ocfs2_journal_dirty(handle, orphan_dir_bh);
2203 if (status < 0) {
2204 mlog_errno(status);
2205 goto leave;
2206 }
2207
2208 status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2209 OCFS2_ORPHAN_NAMELEN, inode,
2210 OCFS2_I(inode)->ip_blkno,
2211 orphan_dir_bh, de_bh);
2212 if (status < 0) {
2213 mlog_errno(status);
2214 goto leave;
2215 }
2216
2217 le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL);
2218
2219 /* Record which orphan dir our inode now resides
2220 * in. delete_inode will use this to determine which orphan
2221 * dir to lock. */
2222 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2223
2224 mlog(0, "Inode %llu orphaned in slot %d\n",
2225 (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num);
2226
2227 leave:
2228 if (orphan_dir_bh)
2229 brelse(orphan_dir_bh);
2230
2231 mlog_exit(status);
2232 return status;
2233 }
2234
2235 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2236 int ocfs2_orphan_del(struct ocfs2_super *osb,
2237 handle_t *handle,
2238 struct inode *orphan_dir_inode,
2239 struct inode *inode,
2240 struct buffer_head *orphan_dir_bh)
2241 {
2242 char name[OCFS2_ORPHAN_NAMELEN + 1];
2243 struct ocfs2_dinode *orphan_fe;
2244 int status = 0;
2245 struct buffer_head *target_de_bh = NULL;
2246 struct ocfs2_dir_entry *target_de = NULL;
2247
2248 mlog_entry_void();
2249
2250 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2251 if (status < 0) {
2252 mlog_errno(status);
2253 goto leave;
2254 }
2255
2256 mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n",
2257 name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2258 OCFS2_ORPHAN_NAMELEN);
2259
2260 /* find it's spot in the orphan directory */
2261 target_de_bh = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN,
2262 orphan_dir_inode, &target_de);
2263 if (!target_de_bh) {
2264 status = -ENOENT;
2265 mlog_errno(status);
2266 goto leave;
2267 }
2268
2269 /* remove it from the orphan directory */
2270 status = ocfs2_delete_entry(handle, orphan_dir_inode, target_de,
2271 target_de_bh);
2272 if (status < 0) {
2273 mlog_errno(status);
2274 goto leave;
2275 }
2276
2277 status = ocfs2_journal_access(handle,orphan_dir_inode, orphan_dir_bh,
2278 OCFS2_JOURNAL_ACCESS_WRITE);
2279 if (status < 0) {
2280 mlog_errno(status);
2281 goto leave;
2282 }
2283
2284 /* do the i_nlink dance! :) */
2285 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2286 if (S_ISDIR(inode->i_mode))
2287 le16_add_cpu(&orphan_fe->i_links_count, -1);
2288 orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count);
2289
2290 status = ocfs2_journal_dirty(handle, orphan_dir_bh);
2291 if (status < 0) {
2292 mlog_errno(status);
2293 goto leave;
2294 }
2295
2296 leave:
2297 if (target_de_bh)
2298 brelse(target_de_bh);
2299
2300 mlog_exit(status);
2301 return status;
2302 }
2303
2304 const struct inode_operations ocfs2_dir_iops = {
2305 .create = ocfs2_create,
2306 .lookup = ocfs2_lookup,
2307 .link = ocfs2_link,
2308 .unlink = ocfs2_unlink,
2309 .rmdir = ocfs2_unlink,
2310 .symlink = ocfs2_symlink,
2311 .mkdir = ocfs2_mkdir,
2312 .mknod = ocfs2_mknod,
2313 .rename = ocfs2_rename,
2314 .setattr = ocfs2_setattr,
2315 .getattr = ocfs2_getattr,
2316 .permission = ocfs2_permission,
2317 };
kmemtrace - Kernel memory tracer