]>
Commit | Line | Data |
---|---|---|
ccd979bd MF |
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" | |
aa958874 | 59 | #include "super.h" |
ccd979bd MF |
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(struct ocfs2_journal_handle *handle, | |
79 | struct inode *dir, | |
80 | struct ocfs2_dir_entry *de_del, | |
81 | struct buffer_head *bh); | |
82 | ||
83 | static int __ocfs2_add_entry(struct ocfs2_journal_handle *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 | struct ocfs2_journal_handle *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 | struct ocfs2_journal_handle *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_double_lock(struct ocfs2_super *osb, | |
108 | struct ocfs2_journal_handle *handle, | |
109 | struct buffer_head **bh1, | |
110 | struct inode *inode1, | |
111 | struct buffer_head **bh2, | |
112 | struct inode *inode2); | |
113 | ||
114 | static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, | |
115 | struct ocfs2_journal_handle *handle, | |
116 | struct inode *inode, | |
117 | char *name, | |
118 | struct buffer_head **de_bh); | |
119 | ||
120 | static int ocfs2_orphan_add(struct ocfs2_super *osb, | |
121 | struct ocfs2_journal_handle *handle, | |
122 | struct inode *inode, | |
123 | struct ocfs2_dinode *fe, | |
124 | char *name, | |
125 | struct buffer_head *de_bh); | |
126 | ||
127 | static int ocfs2_create_symlink_data(struct ocfs2_super *osb, | |
128 | struct ocfs2_journal_handle *handle, | |
129 | struct inode *inode, | |
130 | const char *symname); | |
131 | ||
132 | static inline int ocfs2_add_entry(struct ocfs2_journal_handle *handle, | |
133 | struct dentry *dentry, | |
134 | struct inode *inode, u64 blkno, | |
135 | struct buffer_head *parent_fe_bh, | |
136 | struct buffer_head *insert_bh) | |
137 | { | |
138 | return __ocfs2_add_entry(handle, dentry->d_parent->d_inode, | |
139 | dentry->d_name.name, dentry->d_name.len, | |
140 | inode, blkno, parent_fe_bh, insert_bh); | |
141 | } | |
142 | ||
143 | /* An orphan dir name is an 8 byte value, printed as a hex string */ | |
144 | #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64))) | |
145 | ||
146 | static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry, | |
147 | struct nameidata *nd) | |
148 | { | |
149 | int status; | |
150 | u64 blkno; | |
151 | struct buffer_head *dirent_bh = NULL; | |
152 | struct inode *inode = NULL; | |
153 | struct dentry *ret; | |
154 | struct ocfs2_dir_entry *dirent; | |
155 | struct ocfs2_inode_info *oi; | |
156 | ||
157 | mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry, | |
158 | dentry->d_name.len, dentry->d_name.name); | |
159 | ||
160 | if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) { | |
161 | ret = ERR_PTR(-ENAMETOOLONG); | |
162 | goto bail; | |
163 | } | |
164 | ||
b0697053 MF |
165 | mlog(0, "find name %.*s in directory %llu\n", dentry->d_name.len, |
166 | dentry->d_name.name, (unsigned long long)OCFS2_I(dir)->ip_blkno); | |
ccd979bd MF |
167 | |
168 | status = ocfs2_meta_lock(dir, NULL, NULL, 0); | |
169 | if (status < 0) { | |
170 | if (status != -ENOENT) | |
171 | mlog_errno(status); | |
172 | ret = ERR_PTR(status); | |
173 | goto bail; | |
174 | } | |
175 | ||
176 | status = ocfs2_find_files_on_disk(dentry->d_name.name, | |
177 | dentry->d_name.len, &blkno, | |
178 | dir, &dirent_bh, &dirent); | |
179 | if (status < 0) | |
180 | goto bail_add; | |
181 | ||
24c19ef4 | 182 | inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0); |
ccd979bd | 183 | if (IS_ERR(inode)) { |
b0697053 MF |
184 | mlog(ML_ERROR, "Unable to create inode %llu\n", |
185 | (unsigned long long)blkno); | |
ccd979bd MF |
186 | ret = ERR_PTR(-EACCES); |
187 | goto bail_unlock; | |
188 | } | |
189 | ||
190 | oi = OCFS2_I(inode); | |
191 | /* Clear any orphaned state... If we were able to look up the | |
192 | * inode from a directory, it certainly can't be orphaned. We | |
193 | * might have the bad state from a node which intended to | |
194 | * orphan this inode but crashed before it could commit the | |
195 | * unlink. */ | |
196 | spin_lock(&oi->ip_lock); | |
197 | oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED; | |
198 | oi->ip_orphaned_slot = OCFS2_INVALID_SLOT; | |
199 | spin_unlock(&oi->ip_lock); | |
200 | ||
201 | bail_add: | |
ccd979bd MF |
202 | dentry->d_op = &ocfs2_dentry_ops; |
203 | ret = d_splice_alias(inode, dentry); | |
204 | ||
379dfe9d MF |
205 | if (inode) { |
206 | /* | |
207 | * If d_splice_alias() finds a DCACHE_DISCONNECTED | |
208 | * dentry, it will d_move() it on top of ourse. The | |
209 | * return value will indicate this however, so in | |
210 | * those cases, we switch them around for the locking | |
211 | * code. | |
212 | * | |
213 | * NOTE: This dentry already has ->d_op set from | |
214 | * ocfs2_get_parent() and ocfs2_get_dentry() | |
215 | */ | |
216 | if (ret) | |
217 | dentry = ret; | |
218 | ||
219 | status = ocfs2_dentry_attach_lock(dentry, inode, | |
0027dd5b | 220 | OCFS2_I(dir)->ip_blkno); |
379dfe9d MF |
221 | if (status) { |
222 | mlog_errno(status); | |
223 | ret = ERR_PTR(status); | |
224 | goto bail_unlock; | |
225 | } | |
226 | } | |
227 | ||
ccd979bd MF |
228 | bail_unlock: |
229 | /* Don't drop the cluster lock until *after* the d_add -- | |
230 | * unlink on another node will message us to remove that | |
231 | * dentry under this lock so otherwise we can race this with | |
232 | * the vote thread and have a stale dentry. */ | |
233 | ocfs2_meta_unlock(dir, 0); | |
234 | ||
235 | bail: | |
236 | if (dirent_bh) | |
237 | brelse(dirent_bh); | |
238 | ||
239 | mlog_exit_ptr(ret); | |
240 | ||
241 | return ret; | |
242 | } | |
243 | ||
244 | static int ocfs2_fill_new_dir(struct ocfs2_super *osb, | |
245 | struct ocfs2_journal_handle *handle, | |
246 | struct inode *parent, | |
247 | struct inode *inode, | |
248 | struct buffer_head *fe_bh, | |
249 | struct ocfs2_alloc_context *data_ac) | |
250 | { | |
251 | int status; | |
252 | struct buffer_head *new_bh = NULL; | |
253 | struct ocfs2_dir_entry *de = NULL; | |
254 | ||
255 | mlog_entry_void(); | |
256 | ||
257 | status = ocfs2_do_extend_dir(osb->sb, handle, inode, fe_bh, | |
258 | data_ac, NULL, &new_bh); | |
259 | if (status < 0) { | |
260 | mlog_errno(status); | |
261 | goto bail; | |
262 | } | |
263 | ||
264 | ocfs2_set_new_buffer_uptodate(inode, new_bh); | |
265 | ||
266 | status = ocfs2_journal_access(handle, inode, new_bh, | |
267 | OCFS2_JOURNAL_ACCESS_CREATE); | |
268 | if (status < 0) { | |
269 | mlog_errno(status); | |
270 | goto bail; | |
271 | } | |
272 | memset(new_bh->b_data, 0, osb->sb->s_blocksize); | |
273 | ||
274 | de = (struct ocfs2_dir_entry *) new_bh->b_data; | |
275 | de->inode = cpu_to_le64(OCFS2_I(inode)->ip_blkno); | |
276 | de->name_len = 1; | |
277 | de->rec_len = | |
278 | cpu_to_le16(OCFS2_DIR_REC_LEN(de->name_len)); | |
279 | strcpy(de->name, "."); | |
280 | ocfs2_set_de_type(de, S_IFDIR); | |
281 | de = (struct ocfs2_dir_entry *) ((char *)de + le16_to_cpu(de->rec_len)); | |
282 | de->inode = cpu_to_le64(OCFS2_I(parent)->ip_blkno); | |
283 | de->rec_len = cpu_to_le16(inode->i_sb->s_blocksize - | |
284 | OCFS2_DIR_REC_LEN(1)); | |
285 | de->name_len = 2; | |
286 | strcpy(de->name, ".."); | |
287 | ocfs2_set_de_type(de, S_IFDIR); | |
288 | ||
289 | status = ocfs2_journal_dirty(handle, new_bh); | |
290 | if (status < 0) { | |
291 | mlog_errno(status); | |
292 | goto bail; | |
293 | } | |
294 | ||
295 | i_size_write(inode, inode->i_sb->s_blocksize); | |
296 | inode->i_nlink = 2; | |
297 | inode->i_blocks = ocfs2_align_bytes_to_sectors(inode->i_sb->s_blocksize); | |
298 | status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); | |
299 | if (status < 0) { | |
300 | mlog_errno(status); | |
301 | goto bail; | |
302 | } | |
303 | ||
304 | status = 0; | |
305 | bail: | |
306 | if (new_bh) | |
307 | brelse(new_bh); | |
308 | ||
309 | mlog_exit(status); | |
310 | return status; | |
311 | } | |
312 | ||
313 | static int ocfs2_mknod(struct inode *dir, | |
314 | struct dentry *dentry, | |
315 | int mode, | |
316 | dev_t dev) | |
317 | { | |
318 | int status = 0; | |
319 | struct buffer_head *parent_fe_bh = NULL; | |
320 | struct ocfs2_journal_handle *handle = NULL; | |
321 | struct ocfs2_super *osb; | |
322 | struct ocfs2_dinode *dirfe; | |
323 | struct buffer_head *new_fe_bh = NULL; | |
324 | struct buffer_head *de_bh = NULL; | |
325 | struct inode *inode = NULL; | |
326 | struct ocfs2_alloc_context *inode_ac = NULL; | |
327 | struct ocfs2_alloc_context *data_ac = NULL; | |
328 | ||
329 | mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode, | |
330 | (unsigned long)dev, dentry->d_name.len, | |
331 | dentry->d_name.name); | |
332 | ||
333 | /* get our super block */ | |
334 | osb = OCFS2_SB(dir->i_sb); | |
335 | ||
e3a82138 MF |
336 | status = ocfs2_meta_lock(dir, NULL, &parent_fe_bh, 1); |
337 | if (status < 0) { | |
338 | if (status != -ENOENT) | |
339 | mlog_errno(status); | |
340 | return status; | |
341 | } | |
342 | ||
ccd979bd MF |
343 | handle = ocfs2_alloc_handle(osb); |
344 | if (handle == NULL) { | |
345 | status = -ENOMEM; | |
346 | mlog_errno(status); | |
347 | goto leave; | |
348 | } | |
349 | ||
a663e305 MF |
350 | if (S_ISDIR(mode) && (dir->i_nlink >= OCFS2_LINK_MAX)) { |
351 | status = -EMLINK; | |
352 | goto leave; | |
353 | } | |
354 | ||
ccd979bd MF |
355 | dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; |
356 | if (!dirfe->i_links_count) { | |
357 | /* can't make a file in a deleted directory. */ | |
358 | status = -ENOENT; | |
359 | goto leave; | |
360 | } | |
361 | ||
362 | status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, | |
363 | dentry->d_name.len); | |
364 | if (status) | |
365 | goto leave; | |
366 | ||
367 | /* get a spot inside the dir. */ | |
368 | status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, | |
369 | dentry->d_name.name, | |
370 | dentry->d_name.len, &de_bh); | |
371 | if (status < 0) { | |
372 | mlog_errno(status); | |
373 | goto leave; | |
374 | } | |
375 | ||
376 | /* reserve an inode spot */ | |
377 | status = ocfs2_reserve_new_inode(osb, handle, &inode_ac); | |
378 | if (status < 0) { | |
379 | if (status != -ENOSPC) | |
380 | mlog_errno(status); | |
381 | goto leave; | |
382 | } | |
383 | ||
384 | /* are we making a directory? If so, reserve a cluster for his | |
385 | * 1st extent. */ | |
386 | if (S_ISDIR(mode)) { | |
387 | status = ocfs2_reserve_clusters(osb, handle, 1, &data_ac); | |
388 | if (status < 0) { | |
389 | if (status != -ENOSPC) | |
390 | mlog_errno(status); | |
391 | goto leave; | |
392 | } | |
393 | } | |
394 | ||
395 | handle = ocfs2_start_trans(osb, handle, OCFS2_MKNOD_CREDITS); | |
396 | if (IS_ERR(handle)) { | |
397 | status = PTR_ERR(handle); | |
398 | handle = NULL; | |
399 | mlog_errno(status); | |
400 | goto leave; | |
401 | } | |
402 | ||
403 | /* do the real work now. */ | |
404 | status = ocfs2_mknod_locked(osb, dir, dentry, mode, dev, | |
405 | &new_fe_bh, parent_fe_bh, handle, | |
406 | &inode, inode_ac); | |
407 | if (status < 0) { | |
408 | mlog_errno(status); | |
409 | goto leave; | |
410 | } | |
411 | ||
412 | if (S_ISDIR(mode)) { | |
413 | status = ocfs2_fill_new_dir(osb, handle, dir, inode, | |
414 | new_fe_bh, data_ac); | |
415 | if (status < 0) { | |
416 | mlog_errno(status); | |
417 | goto leave; | |
418 | } | |
419 | ||
420 | status = ocfs2_journal_access(handle, dir, parent_fe_bh, | |
421 | OCFS2_JOURNAL_ACCESS_WRITE); | |
422 | if (status < 0) { | |
423 | mlog_errno(status); | |
424 | goto leave; | |
425 | } | |
426 | le16_add_cpu(&dirfe->i_links_count, 1); | |
427 | status = ocfs2_journal_dirty(handle, parent_fe_bh); | |
428 | if (status < 0) { | |
429 | mlog_errno(status); | |
430 | goto leave; | |
431 | } | |
d8c76e6f | 432 | inc_nlink(dir); |
ccd979bd MF |
433 | } |
434 | ||
435 | status = ocfs2_add_entry(handle, dentry, inode, | |
436 | OCFS2_I(inode)->ip_blkno, parent_fe_bh, | |
437 | de_bh); | |
438 | if (status < 0) { | |
439 | mlog_errno(status); | |
440 | goto leave; | |
441 | } | |
442 | ||
379dfe9d | 443 | status = ocfs2_dentry_attach_lock(dentry, inode, |
0027dd5b | 444 | OCFS2_I(dir)->ip_blkno); |
379dfe9d MF |
445 | if (status) { |
446 | mlog_errno(status); | |
447 | goto leave; | |
448 | } | |
449 | ||
ccd979bd MF |
450 | insert_inode_hash(inode); |
451 | dentry->d_op = &ocfs2_dentry_ops; | |
452 | d_instantiate(dentry, inode); | |
453 | status = 0; | |
454 | leave: | |
455 | if (handle) | |
456 | ocfs2_commit_trans(handle); | |
457 | ||
e3a82138 MF |
458 | ocfs2_meta_unlock(dir, 1); |
459 | ||
ccd979bd MF |
460 | if (status == -ENOSPC) |
461 | mlog(0, "Disk is full\n"); | |
462 | ||
463 | if (new_fe_bh) | |
464 | brelse(new_fe_bh); | |
465 | ||
466 | if (de_bh) | |
467 | brelse(de_bh); | |
468 | ||
469 | if (parent_fe_bh) | |
470 | brelse(parent_fe_bh); | |
471 | ||
472 | if ((status < 0) && inode) | |
473 | iput(inode); | |
474 | ||
475 | if (inode_ac) | |
476 | ocfs2_free_alloc_context(inode_ac); | |
477 | ||
478 | if (data_ac) | |
479 | ocfs2_free_alloc_context(data_ac); | |
480 | ||
481 | mlog_exit(status); | |
482 | ||
483 | return status; | |
484 | } | |
485 | ||
486 | static int ocfs2_mknod_locked(struct ocfs2_super *osb, | |
487 | struct inode *dir, | |
488 | struct dentry *dentry, int mode, | |
489 | dev_t dev, | |
490 | struct buffer_head **new_fe_bh, | |
491 | struct buffer_head *parent_fe_bh, | |
492 | struct ocfs2_journal_handle *handle, | |
493 | struct inode **ret_inode, | |
494 | struct ocfs2_alloc_context *inode_ac) | |
495 | { | |
496 | int status = 0; | |
497 | struct ocfs2_dinode *fe = NULL; | |
498 | struct ocfs2_extent_list *fel; | |
499 | u64 fe_blkno = 0; | |
500 | u16 suballoc_bit; | |
501 | struct inode *inode = NULL; | |
502 | ||
503 | mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode, | |
504 | (unsigned long)dev, dentry->d_name.len, | |
505 | dentry->d_name.name); | |
506 | ||
507 | *new_fe_bh = NULL; | |
508 | *ret_inode = NULL; | |
509 | ||
510 | status = ocfs2_claim_new_inode(osb, handle, inode_ac, &suballoc_bit, | |
511 | &fe_blkno); | |
512 | if (status < 0) { | |
513 | mlog_errno(status); | |
514 | goto leave; | |
515 | } | |
516 | ||
517 | inode = new_inode(dir->i_sb); | |
518 | if (IS_ERR(inode)) { | |
519 | status = PTR_ERR(inode); | |
520 | mlog(ML_ERROR, "new_inode failed!\n"); | |
521 | goto leave; | |
522 | } | |
523 | ||
524 | /* populate as many fields early on as possible - many of | |
525 | * these are used by the support functions here and in | |
526 | * callers. */ | |
527 | inode->i_ino = ino_from_blkno(osb->sb, fe_blkno); | |
528 | OCFS2_I(inode)->ip_blkno = fe_blkno; | |
529 | if (S_ISDIR(mode)) | |
530 | inode->i_nlink = 2; | |
531 | else | |
532 | inode->i_nlink = 1; | |
533 | inode->i_mode = mode; | |
534 | spin_lock(&osb->osb_lock); | |
535 | inode->i_generation = osb->s_next_generation++; | |
536 | spin_unlock(&osb->osb_lock); | |
537 | ||
538 | *new_fe_bh = sb_getblk(osb->sb, fe_blkno); | |
539 | if (!*new_fe_bh) { | |
540 | status = -EIO; | |
541 | mlog_errno(status); | |
542 | goto leave; | |
543 | } | |
544 | ocfs2_set_new_buffer_uptodate(inode, *new_fe_bh); | |
545 | ||
546 | status = ocfs2_journal_access(handle, inode, *new_fe_bh, | |
547 | OCFS2_JOURNAL_ACCESS_CREATE); | |
548 | if (status < 0) { | |
549 | mlog_errno(status); | |
550 | goto leave; | |
551 | } | |
552 | ||
553 | fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data; | |
554 | memset(fe, 0, osb->sb->s_blocksize); | |
555 | ||
556 | fe->i_generation = cpu_to_le32(inode->i_generation); | |
557 | fe->i_fs_generation = cpu_to_le32(osb->fs_generation); | |
558 | fe->i_blkno = cpu_to_le64(fe_blkno); | |
559 | fe->i_suballoc_bit = cpu_to_le16(suballoc_bit); | |
560 | fe->i_suballoc_slot = cpu_to_le16(osb->slot_num); | |
561 | fe->i_uid = cpu_to_le32(current->fsuid); | |
562 | if (dir->i_mode & S_ISGID) { | |
563 | fe->i_gid = cpu_to_le32(dir->i_gid); | |
564 | if (S_ISDIR(mode)) | |
565 | mode |= S_ISGID; | |
566 | } else | |
567 | fe->i_gid = cpu_to_le32(current->fsgid); | |
568 | fe->i_mode = cpu_to_le16(mode); | |
569 | if (S_ISCHR(mode) || S_ISBLK(mode)) | |
570 | fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev)); | |
571 | ||
572 | fe->i_links_count = cpu_to_le16(inode->i_nlink); | |
573 | ||
574 | fe->i_last_eb_blk = 0; | |
575 | strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE); | |
576 | le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL); | |
577 | fe->i_atime = fe->i_ctime = fe->i_mtime = | |
578 | cpu_to_le64(CURRENT_TIME.tv_sec); | |
579 | fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = | |
580 | cpu_to_le32(CURRENT_TIME.tv_nsec); | |
581 | fe->i_dtime = 0; | |
582 | ||
583 | fel = &fe->id2.i_list; | |
584 | fel->l_tree_depth = 0; | |
585 | fel->l_next_free_rec = 0; | |
586 | fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb)); | |
587 | ||
588 | status = ocfs2_journal_dirty(handle, *new_fe_bh); | |
589 | if (status < 0) { | |
590 | mlog_errno(status); | |
591 | goto leave; | |
592 | } | |
593 | ||
594 | if (ocfs2_populate_inode(inode, fe, 1) < 0) { | |
595 | mlog(ML_ERROR, "populate inode failed! bh->b_blocknr=%llu, " | |
b0697053 | 596 | "i_blkno=%llu, i_ino=%lu\n", |
ccd979bd | 597 | (unsigned long long) (*new_fe_bh)->b_blocknr, |
b0697053 | 598 | (unsigned long long)fe->i_blkno, inode->i_ino); |
ccd979bd MF |
599 | BUG(); |
600 | } | |
601 | ||
602 | ocfs2_inode_set_new(osb, inode); | |
603 | status = ocfs2_create_new_inode_locks(inode); | |
604 | if (status < 0) | |
605 | mlog_errno(status); | |
606 | ||
607 | status = 0; /* error in ocfs2_create_new_inode_locks is not | |
608 | * critical */ | |
609 | ||
610 | *ret_inode = inode; | |
611 | leave: | |
612 | if (status < 0) { | |
613 | if (*new_fe_bh) { | |
614 | brelse(*new_fe_bh); | |
615 | *new_fe_bh = NULL; | |
616 | } | |
617 | if (inode) | |
618 | iput(inode); | |
619 | } | |
620 | ||
621 | mlog_exit(status); | |
622 | return status; | |
623 | } | |
624 | ||
625 | static int ocfs2_mkdir(struct inode *dir, | |
626 | struct dentry *dentry, | |
627 | int mode) | |
628 | { | |
629 | int ret; | |
630 | ||
631 | mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode, | |
632 | dentry->d_name.len, dentry->d_name.name); | |
633 | ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0); | |
634 | mlog_exit(ret); | |
635 | ||
636 | return ret; | |
637 | } | |
638 | ||
639 | static int ocfs2_create(struct inode *dir, | |
640 | struct dentry *dentry, | |
641 | int mode, | |
642 | struct nameidata *nd) | |
643 | { | |
644 | int ret; | |
645 | ||
646 | mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode, | |
647 | dentry->d_name.len, dentry->d_name.name); | |
648 | ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0); | |
649 | mlog_exit(ret); | |
650 | ||
651 | return ret; | |
652 | } | |
653 | ||
654 | static int ocfs2_link(struct dentry *old_dentry, | |
655 | struct inode *dir, | |
656 | struct dentry *dentry) | |
657 | { | |
658 | struct ocfs2_journal_handle *handle = NULL; | |
659 | struct inode *inode = old_dentry->d_inode; | |
660 | int err; | |
661 | struct buffer_head *fe_bh = NULL; | |
662 | struct buffer_head *parent_fe_bh = NULL; | |
663 | struct buffer_head *de_bh = NULL; | |
664 | struct ocfs2_dinode *fe = NULL; | |
665 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
666 | ||
667 | mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino, | |
668 | old_dentry->d_name.len, old_dentry->d_name.name, | |
669 | dentry->d_name.len, dentry->d_name.name); | |
670 | ||
671 | if (S_ISDIR(inode->i_mode)) { | |
672 | err = -EPERM; | |
673 | goto bail; | |
674 | } | |
675 | ||
ccd979bd MF |
676 | handle = ocfs2_alloc_handle(osb); |
677 | if (handle == NULL) { | |
678 | err = -ENOMEM; | |
679 | goto bail; | |
680 | } | |
681 | ||
682 | err = ocfs2_meta_lock(dir, handle, &parent_fe_bh, 1); | |
683 | if (err < 0) { | |
684 | if (err != -ENOENT) | |
685 | mlog_errno(err); | |
686 | goto bail; | |
687 | } | |
688 | ||
0f62de2c TY |
689 | if (!dir->i_nlink) { |
690 | err = -ENOENT; | |
691 | goto bail; | |
692 | } | |
693 | ||
ccd979bd MF |
694 | err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, |
695 | dentry->d_name.len); | |
696 | if (err) | |
697 | goto bail; | |
698 | ||
699 | err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, | |
700 | dentry->d_name.name, | |
701 | dentry->d_name.len, &de_bh); | |
702 | if (err < 0) { | |
703 | mlog_errno(err); | |
704 | goto bail; | |
705 | } | |
706 | ||
707 | err = ocfs2_meta_lock(inode, handle, &fe_bh, 1); | |
708 | if (err < 0) { | |
709 | if (err != -ENOENT) | |
710 | mlog_errno(err); | |
711 | goto bail; | |
712 | } | |
713 | ||
714 | fe = (struct ocfs2_dinode *) fe_bh->b_data; | |
715 | if (le16_to_cpu(fe->i_links_count) >= OCFS2_LINK_MAX) { | |
716 | err = -EMLINK; | |
717 | goto bail; | |
718 | } | |
719 | ||
720 | handle = ocfs2_start_trans(osb, handle, OCFS2_LINK_CREDITS); | |
721 | if (IS_ERR(handle)) { | |
722 | err = PTR_ERR(handle); | |
723 | handle = NULL; | |
724 | mlog_errno(err); | |
725 | goto bail; | |
726 | } | |
727 | ||
728 | err = ocfs2_journal_access(handle, inode, fe_bh, | |
729 | OCFS2_JOURNAL_ACCESS_WRITE); | |
730 | if (err < 0) { | |
731 | mlog_errno(err); | |
732 | goto bail; | |
733 | } | |
734 | ||
d8c76e6f | 735 | inc_nlink(inode); |
ccd979bd MF |
736 | inode->i_ctime = CURRENT_TIME; |
737 | fe->i_links_count = cpu_to_le16(inode->i_nlink); | |
738 | fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
739 | fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
740 | ||
741 | err = ocfs2_journal_dirty(handle, fe_bh); | |
742 | if (err < 0) { | |
743 | le16_add_cpu(&fe->i_links_count, -1); | |
9a53c3a7 | 744 | drop_nlink(inode); |
ccd979bd MF |
745 | mlog_errno(err); |
746 | goto bail; | |
747 | } | |
748 | ||
749 | err = ocfs2_add_entry(handle, dentry, inode, | |
750 | OCFS2_I(inode)->ip_blkno, | |
751 | parent_fe_bh, de_bh); | |
752 | if (err) { | |
753 | le16_add_cpu(&fe->i_links_count, -1); | |
9a53c3a7 | 754 | drop_nlink(inode); |
ccd979bd MF |
755 | mlog_errno(err); |
756 | goto bail; | |
757 | } | |
758 | ||
0027dd5b | 759 | err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); |
379dfe9d MF |
760 | if (err) { |
761 | mlog_errno(err); | |
762 | goto bail; | |
763 | } | |
764 | ||
ccd979bd MF |
765 | atomic_inc(&inode->i_count); |
766 | dentry->d_op = &ocfs2_dentry_ops; | |
767 | d_instantiate(dentry, inode); | |
768 | bail: | |
769 | if (handle) | |
770 | ocfs2_commit_trans(handle); | |
771 | if (de_bh) | |
772 | brelse(de_bh); | |
773 | if (fe_bh) | |
774 | brelse(fe_bh); | |
775 | if (parent_fe_bh) | |
776 | brelse(parent_fe_bh); | |
777 | ||
778 | mlog_exit(err); | |
779 | ||
780 | return err; | |
781 | } | |
782 | ||
379dfe9d MF |
783 | /* |
784 | * Takes and drops an exclusive lock on the given dentry. This will | |
785 | * force other nodes to drop it. | |
786 | */ | |
787 | static int ocfs2_remote_dentry_delete(struct dentry *dentry) | |
788 | { | |
789 | int ret; | |
790 | ||
791 | ret = ocfs2_dentry_lock(dentry, 1); | |
792 | if (ret) | |
793 | mlog_errno(ret); | |
794 | else | |
795 | ocfs2_dentry_unlock(dentry, 1); | |
796 | ||
797 | return ret; | |
798 | } | |
799 | ||
17ff7856 MF |
800 | static inline int inode_is_unlinkable(struct inode *inode) |
801 | { | |
802 | if (S_ISDIR(inode->i_mode)) { | |
803 | if (inode->i_nlink == 2) | |
804 | return 1; | |
805 | return 0; | |
806 | } | |
807 | ||
808 | if (inode->i_nlink == 1) | |
809 | return 1; | |
810 | return 0; | |
811 | } | |
812 | ||
ccd979bd MF |
813 | static int ocfs2_unlink(struct inode *dir, |
814 | struct dentry *dentry) | |
815 | { | |
816 | int status; | |
ccd979bd MF |
817 | struct inode *inode = dentry->d_inode; |
818 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
819 | u64 blkno; | |
820 | struct ocfs2_dinode *fe = NULL; | |
821 | struct buffer_head *fe_bh = NULL; | |
822 | struct buffer_head *parent_node_bh = NULL; | |
823 | struct ocfs2_journal_handle *handle = NULL; | |
824 | struct ocfs2_dir_entry *dirent = NULL; | |
825 | struct buffer_head *dirent_bh = NULL; | |
826 | char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; | |
827 | struct buffer_head *orphan_entry_bh = NULL; | |
828 | ||
829 | mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry, | |
830 | dentry->d_name.len, dentry->d_name.name); | |
831 | ||
832 | BUG_ON(dentry->d_parent->d_inode != dir); | |
833 | ||
b0697053 | 834 | mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno); |
ccd979bd MF |
835 | |
836 | if (inode == osb->root_inode) { | |
837 | mlog(0, "Cannot delete the root directory\n"); | |
838 | status = -EPERM; | |
839 | goto leave; | |
840 | } | |
841 | ||
842 | handle = ocfs2_alloc_handle(osb); | |
843 | if (handle == NULL) { | |
844 | status = -ENOMEM; | |
845 | mlog_errno(status); | |
846 | goto leave; | |
847 | } | |
848 | ||
849 | status = ocfs2_meta_lock(dir, handle, &parent_node_bh, 1); | |
850 | if (status < 0) { | |
851 | if (status != -ENOENT) | |
852 | mlog_errno(status); | |
853 | goto leave; | |
854 | } | |
855 | ||
856 | status = ocfs2_find_files_on_disk(dentry->d_name.name, | |
857 | dentry->d_name.len, &blkno, | |
858 | dir, &dirent_bh, &dirent); | |
859 | if (status < 0) { | |
860 | if (status != -ENOENT) | |
861 | mlog_errno(status); | |
862 | goto leave; | |
863 | } | |
864 | ||
865 | if (OCFS2_I(inode)->ip_blkno != blkno) { | |
866 | status = -ENOENT; | |
867 | ||
b0697053 MF |
868 | mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n", |
869 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
870 | (unsigned long long)blkno, OCFS2_I(inode)->ip_flags); | |
ccd979bd MF |
871 | goto leave; |
872 | } | |
873 | ||
874 | status = ocfs2_meta_lock(inode, handle, &fe_bh, 1); | |
875 | if (status < 0) { | |
876 | if (status != -ENOENT) | |
877 | mlog_errno(status); | |
878 | goto leave; | |
879 | } | |
880 | ||
881 | if (S_ISDIR(inode->i_mode)) { | |
882 | if (!ocfs2_empty_dir(inode)) { | |
883 | status = -ENOTEMPTY; | |
884 | goto leave; | |
885 | } else if (inode->i_nlink != 2) { | |
886 | status = -ENOTEMPTY; | |
887 | goto leave; | |
888 | } | |
889 | } | |
890 | ||
379dfe9d | 891 | status = ocfs2_remote_dentry_delete(dentry); |
ccd979bd MF |
892 | if (status < 0) { |
893 | /* This vote should succeed under all normal | |
894 | * circumstances. */ | |
895 | mlog_errno(status); | |
896 | goto leave; | |
897 | } | |
898 | ||
17ff7856 | 899 | if (inode_is_unlinkable(inode)) { |
ccd979bd MF |
900 | status = ocfs2_prepare_orphan_dir(osb, handle, inode, |
901 | orphan_name, | |
902 | &orphan_entry_bh); | |
903 | if (status < 0) { | |
904 | mlog_errno(status); | |
905 | goto leave; | |
906 | } | |
907 | } | |
908 | ||
909 | handle = ocfs2_start_trans(osb, handle, OCFS2_UNLINK_CREDITS); | |
910 | if (IS_ERR(handle)) { | |
911 | status = PTR_ERR(handle); | |
912 | handle = NULL; | |
913 | mlog_errno(status); | |
914 | goto leave; | |
915 | } | |
916 | ||
917 | status = ocfs2_journal_access(handle, inode, fe_bh, | |
918 | OCFS2_JOURNAL_ACCESS_WRITE); | |
919 | if (status < 0) { | |
920 | mlog_errno(status); | |
921 | goto leave; | |
922 | } | |
923 | ||
924 | fe = (struct ocfs2_dinode *) fe_bh->b_data; | |
925 | ||
17ff7856 | 926 | if (inode_is_unlinkable(inode)) { |
ccd979bd MF |
927 | status = ocfs2_orphan_add(osb, handle, inode, fe, orphan_name, |
928 | orphan_entry_bh); | |
929 | if (status < 0) { | |
930 | mlog_errno(status); | |
931 | goto leave; | |
932 | } | |
933 | } | |
934 | ||
935 | /* delete the name from the parent dir */ | |
936 | status = ocfs2_delete_entry(handle, dir, dirent, dirent_bh); | |
937 | if (status < 0) { | |
938 | mlog_errno(status); | |
939 | goto leave; | |
940 | } | |
941 | ||
17ff7856 MF |
942 | if (S_ISDIR(inode->i_mode)) |
943 | drop_nlink(inode); | |
944 | drop_nlink(inode); | |
ccd979bd | 945 | fe->i_links_count = cpu_to_le16(inode->i_nlink); |
ccd979bd MF |
946 | |
947 | status = ocfs2_journal_dirty(handle, fe_bh); | |
948 | if (status < 0) { | |
949 | mlog_errno(status); | |
950 | goto leave; | |
951 | } | |
952 | ||
953 | if (S_ISDIR(inode->i_mode)) { | |
17ff7856 | 954 | drop_nlink(dir); |
ccd979bd MF |
955 | status = ocfs2_mark_inode_dirty(handle, dir, |
956 | parent_node_bh); | |
957 | if (status < 0) { | |
958 | mlog_errno(status); | |
d8c76e6f | 959 | inc_nlink(dir); |
ccd979bd MF |
960 | } |
961 | } | |
962 | ||
963 | leave: | |
ccd979bd MF |
964 | if (handle) |
965 | ocfs2_commit_trans(handle); | |
966 | ||
967 | if (fe_bh) | |
968 | brelse(fe_bh); | |
969 | ||
970 | if (dirent_bh) | |
971 | brelse(dirent_bh); | |
972 | ||
973 | if (parent_node_bh) | |
974 | brelse(parent_node_bh); | |
975 | ||
976 | if (orphan_entry_bh) | |
977 | brelse(orphan_entry_bh); | |
978 | ||
979 | mlog_exit(status); | |
980 | ||
981 | return status; | |
982 | } | |
983 | ||
984 | /* | |
985 | * The only place this should be used is rename! | |
986 | * if they have the same id, then the 1st one is the only one locked. | |
987 | */ | |
988 | static int ocfs2_double_lock(struct ocfs2_super *osb, | |
989 | struct ocfs2_journal_handle *handle, | |
990 | struct buffer_head **bh1, | |
991 | struct inode *inode1, | |
992 | struct buffer_head **bh2, | |
993 | struct inode *inode2) | |
994 | { | |
995 | int status; | |
996 | struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); | |
997 | struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); | |
998 | struct buffer_head **tmpbh; | |
999 | struct inode *tmpinode; | |
1000 | ||
b0697053 MF |
1001 | mlog_entry("(inode1 = %llu, inode2 = %llu)\n", |
1002 | (unsigned long long)oi1->ip_blkno, | |
1003 | (unsigned long long)oi2->ip_blkno); | |
ccd979bd MF |
1004 | |
1005 | BUG_ON(!handle); | |
1006 | ||
1007 | if (*bh1) | |
1008 | *bh1 = NULL; | |
1009 | if (*bh2) | |
1010 | *bh2 = NULL; | |
1011 | ||
1012 | /* we always want to lock the one with the lower lockid first. */ | |
1013 | if (oi1->ip_blkno != oi2->ip_blkno) { | |
1014 | if (oi1->ip_blkno < oi2->ip_blkno) { | |
1015 | /* switch id1 and id2 around */ | |
1016 | mlog(0, "switching them around...\n"); | |
1017 | tmpbh = bh2; | |
1018 | bh2 = bh1; | |
1019 | bh1 = tmpbh; | |
1020 | ||
1021 | tmpinode = inode2; | |
1022 | inode2 = inode1; | |
1023 | inode1 = tmpinode; | |
1024 | } | |
1025 | /* lock id2 */ | |
1026 | status = ocfs2_meta_lock(inode2, handle, bh2, 1); | |
1027 | if (status < 0) { | |
1028 | if (status != -ENOENT) | |
1029 | mlog_errno(status); | |
1030 | goto bail; | |
1031 | } | |
1032 | } | |
1033 | /* lock id1 */ | |
1034 | status = ocfs2_meta_lock(inode1, handle, bh1, 1); | |
1035 | if (status < 0) { | |
1036 | if (status != -ENOENT) | |
1037 | mlog_errno(status); | |
1038 | goto bail; | |
1039 | } | |
1040 | bail: | |
1041 | mlog_exit(status); | |
1042 | return status; | |
1043 | } | |
1044 | ||
1045 | #define PARENT_INO(buffer) \ | |
1046 | ((struct ocfs2_dir_entry *) \ | |
1047 | ((char *)buffer + \ | |
1048 | le16_to_cpu(((struct ocfs2_dir_entry *)buffer)->rec_len)))->inode | |
1049 | ||
1050 | static int ocfs2_rename(struct inode *old_dir, | |
1051 | struct dentry *old_dentry, | |
1052 | struct inode *new_dir, | |
1053 | struct dentry *new_dentry) | |
1054 | { | |
1055 | int status = 0, rename_lock = 0; | |
1056 | struct inode *old_inode = old_dentry->d_inode; | |
1057 | struct inode *new_inode = new_dentry->d_inode; | |
1058 | struct ocfs2_dinode *newfe = NULL; | |
1059 | char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; | |
1060 | struct buffer_head *orphan_entry_bh = NULL; | |
1061 | struct buffer_head *newfe_bh = NULL; | |
1062 | struct buffer_head *insert_entry_bh = NULL; | |
1063 | struct ocfs2_super *osb = NULL; | |
1064 | u64 newfe_blkno; | |
1065 | struct ocfs2_journal_handle *handle = NULL; | |
1066 | struct buffer_head *old_dir_bh = NULL; | |
1067 | struct buffer_head *new_dir_bh = NULL; | |
1068 | struct ocfs2_dir_entry *old_de = NULL, *new_de = NULL; // dirent for old_dentry | |
1069 | // and new_dentry | |
1070 | struct buffer_head *new_de_bh = NULL, *old_de_bh = NULL; // bhs for above | |
1071 | struct buffer_head *old_inode_de_bh = NULL; // if old_dentry is a dir, | |
1072 | // this is the 1st dirent bh | |
1073 | nlink_t old_dir_nlink = old_dir->i_nlink, new_dir_nlink = new_dir->i_nlink; | |
ccd979bd MF |
1074 | |
1075 | /* At some point it might be nice to break this function up a | |
1076 | * bit. */ | |
1077 | ||
1078 | mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n", | |
1079 | old_dir, old_dentry, new_dir, new_dentry, | |
1080 | old_dentry->d_name.len, old_dentry->d_name.name, | |
1081 | new_dentry->d_name.len, new_dentry->d_name.name); | |
1082 | ||
1083 | osb = OCFS2_SB(old_dir->i_sb); | |
1084 | ||
1085 | if (new_inode) { | |
1086 | if (!igrab(new_inode)) | |
1087 | BUG(); | |
1088 | } | |
1089 | ||
ccd979bd MF |
1090 | /* Assume a directory heirarchy thusly: |
1091 | * a/b/c | |
1092 | * a/d | |
1093 | * a,b,c, and d are all directories. | |
1094 | * | |
1095 | * from cwd of 'a' on both nodes: | |
1096 | * node1: mv b/c d | |
1097 | * node2: mv d b/c | |
1098 | * | |
1099 | * And that's why, just like the VFS, we need a file system | |
1100 | * rename lock. */ | |
1101 | if (old_dentry != new_dentry) { | |
1102 | status = ocfs2_rename_lock(osb); | |
1103 | if (status < 0) { | |
1104 | mlog_errno(status); | |
1105 | goto bail; | |
1106 | } | |
1107 | rename_lock = 1; | |
1108 | } | |
1109 | ||
1110 | handle = ocfs2_alloc_handle(osb); | |
1111 | if (handle == NULL) { | |
1112 | status = -ENOMEM; | |
1113 | mlog_errno(status); | |
1114 | goto bail; | |
1115 | } | |
1116 | ||
1117 | /* if old and new are the same, this'll just do one lock. */ | |
1118 | status = ocfs2_double_lock(osb, handle, | |
1119 | &old_dir_bh, old_dir, | |
1120 | &new_dir_bh, new_dir); | |
1121 | if (status < 0) { | |
1122 | mlog_errno(status); | |
1123 | goto bail; | |
1124 | } | |
1125 | ||
1126 | /* make sure both dirs have bhs | |
1127 | * get an extra ref on old_dir_bh if old==new */ | |
1128 | if (!new_dir_bh) { | |
1129 | if (old_dir_bh) { | |
1130 | new_dir_bh = old_dir_bh; | |
1131 | get_bh(new_dir_bh); | |
1132 | } else { | |
1133 | mlog(ML_ERROR, "no old_dir_bh!\n"); | |
1134 | status = -EIO; | |
1135 | goto bail; | |
1136 | } | |
1137 | } | |
1138 | ||
379dfe9d MF |
1139 | /* |
1140 | * Though we don't require an inode meta data update if | |
1141 | * old_inode is not a directory, we lock anyway here to ensure | |
1142 | * the vote thread on other nodes won't have to concurrently | |
1143 | * downconvert the inode and the dentry locks. | |
1144 | */ | |
1145 | status = ocfs2_meta_lock(old_inode, handle, NULL, 1); | |
1146 | if (status < 0) { | |
1147 | if (status != -ENOENT) | |
ccd979bd | 1148 | mlog_errno(status); |
379dfe9d MF |
1149 | goto bail; |
1150 | } | |
ccd979bd | 1151 | |
379dfe9d MF |
1152 | status = ocfs2_remote_dentry_delete(old_dentry); |
1153 | if (status < 0) { | |
1154 | mlog_errno(status); | |
1155 | goto bail; | |
1156 | } | |
1157 | ||
1158 | if (S_ISDIR(old_inode->i_mode)) { | |
ccd979bd MF |
1159 | status = -EIO; |
1160 | old_inode_de_bh = ocfs2_bread(old_inode, 0, &status, 0); | |
1161 | if (!old_inode_de_bh) | |
1162 | goto bail; | |
1163 | ||
1164 | status = -EIO; | |
1165 | if (le64_to_cpu(PARENT_INO(old_inode_de_bh->b_data)) != | |
1166 | OCFS2_I(old_dir)->ip_blkno) | |
1167 | goto bail; | |
1168 | status = -EMLINK; | |
1169 | if (!new_inode && new_dir!=old_dir && | |
1170 | new_dir->i_nlink >= OCFS2_LINK_MAX) | |
1171 | goto bail; | |
ccd979bd MF |
1172 | } |
1173 | ||
1174 | status = -ENOENT; | |
1175 | old_de_bh = ocfs2_find_entry(old_dentry->d_name.name, | |
1176 | old_dentry->d_name.len, | |
1177 | old_dir, &old_de); | |
1178 | if (!old_de_bh) | |
1179 | goto bail; | |
1180 | ||
1181 | /* | |
1182 | * Check for inode number is _not_ due to possible IO errors. | |
1183 | * We might rmdir the source, keep it as pwd of some process | |
1184 | * and merrily kill the link to whatever was created under the | |
1185 | * same name. Goodbye sticky bit ;-< | |
1186 | */ | |
1187 | if (le64_to_cpu(old_de->inode) != OCFS2_I(old_inode)->ip_blkno) | |
1188 | goto bail; | |
1189 | ||
1190 | /* check if the target already exists (in which case we need | |
1191 | * to delete it */ | |
1192 | status = ocfs2_find_files_on_disk(new_dentry->d_name.name, | |
1193 | new_dentry->d_name.len, | |
1194 | &newfe_blkno, new_dir, &new_de_bh, | |
1195 | &new_de); | |
1196 | /* The only error we allow here is -ENOENT because the new | |
1197 | * file not existing is perfectly valid. */ | |
1198 | if ((status < 0) && (status != -ENOENT)) { | |
1199 | /* If we cannot find the file specified we should just */ | |
1200 | /* return the error... */ | |
1201 | mlog_errno(status); | |
1202 | goto bail; | |
1203 | } | |
1204 | ||
1205 | if (!new_de && new_inode) | |
1206 | mlog(ML_ERROR, "inode %lu does not exist in it's parent " | |
1207 | "directory!", new_inode->i_ino); | |
1208 | ||
1209 | /* In case we need to overwrite an existing file, we blow it | |
1210 | * away first */ | |
1211 | if (new_de) { | |
1212 | /* VFS didn't think there existed an inode here, but | |
1213 | * someone else in the cluster must have raced our | |
1214 | * rename to create one. Today we error cleanly, in | |
1215 | * the future we should consider calling iget to build | |
1216 | * a new struct inode for this entry. */ | |
1217 | if (!new_inode) { | |
1218 | status = -EACCES; | |
1219 | ||
1220 | mlog(0, "We found an inode for name %.*s but VFS " | |
1221 | "didn't give us one.\n", new_dentry->d_name.len, | |
1222 | new_dentry->d_name.name); | |
1223 | goto bail; | |
1224 | } | |
1225 | ||
1226 | if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { | |
1227 | status = -EACCES; | |
1228 | ||
b0697053 MF |
1229 | mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n", |
1230 | (unsigned long long)OCFS2_I(new_inode)->ip_blkno, | |
1231 | (unsigned long long)newfe_blkno, | |
ccd979bd MF |
1232 | OCFS2_I(new_inode)->ip_flags); |
1233 | goto bail; | |
1234 | } | |
1235 | ||
1236 | status = ocfs2_meta_lock(new_inode, handle, &newfe_bh, 1); | |
1237 | if (status < 0) { | |
1238 | if (status != -ENOENT) | |
1239 | mlog_errno(status); | |
1240 | goto bail; | |
1241 | } | |
1242 | ||
379dfe9d | 1243 | status = ocfs2_remote_dentry_delete(new_dentry); |
ccd979bd MF |
1244 | if (status < 0) { |
1245 | mlog_errno(status); | |
1246 | goto bail; | |
1247 | } | |
1248 | ||
1249 | newfe = (struct ocfs2_dinode *) newfe_bh->b_data; | |
1250 | ||
b0697053 MF |
1251 | mlog(0, "aha rename over existing... new_de=%p new_blkno=%llu " |
1252 | "newfebh=%p bhblocknr=%llu\n", new_de, | |
1253 | (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? | |
ccd979bd MF |
1254 | (unsigned long long)newfe_bh->b_blocknr : 0ULL); |
1255 | ||
1256 | if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { | |
1257 | status = ocfs2_prepare_orphan_dir(osb, handle, | |
1258 | new_inode, | |
1259 | orphan_name, | |
1260 | &orphan_entry_bh); | |
1261 | if (status < 0) { | |
1262 | mlog_errno(status); | |
1263 | goto bail; | |
1264 | } | |
1265 | } | |
1266 | } else { | |
1267 | BUG_ON(new_dentry->d_parent->d_inode != new_dir); | |
1268 | ||
1269 | status = ocfs2_check_dir_for_entry(new_dir, | |
1270 | new_dentry->d_name.name, | |
1271 | new_dentry->d_name.len); | |
1272 | if (status) | |
1273 | goto bail; | |
1274 | ||
1275 | status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, | |
1276 | new_dentry->d_name.name, | |
1277 | new_dentry->d_name.len, | |
1278 | &insert_entry_bh); | |
1279 | if (status < 0) { | |
1280 | mlog_errno(status); | |
1281 | goto bail; | |
1282 | } | |
1283 | } | |
1284 | ||
1285 | handle = ocfs2_start_trans(osb, handle, OCFS2_RENAME_CREDITS); | |
1286 | if (IS_ERR(handle)) { | |
1287 | status = PTR_ERR(handle); | |
1288 | handle = NULL; | |
1289 | mlog_errno(status); | |
1290 | goto bail; | |
1291 | } | |
1292 | ||
1293 | if (new_de) { | |
1294 | if (S_ISDIR(new_inode->i_mode)) { | |
1295 | if (!ocfs2_empty_dir(new_inode) || | |
1296 | new_inode->i_nlink != 2) { | |
1297 | status = -ENOTEMPTY; | |
1298 | goto bail; | |
1299 | } | |
1300 | } | |
1301 | status = ocfs2_journal_access(handle, new_inode, newfe_bh, | |
1302 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1303 | if (status < 0) { | |
1304 | mlog_errno(status); | |
1305 | goto bail; | |
1306 | } | |
1307 | ||
1308 | if (S_ISDIR(new_inode->i_mode) || | |
1309 | (newfe->i_links_count == cpu_to_le16(1))){ | |
1310 | status = ocfs2_orphan_add(osb, handle, new_inode, | |
1311 | newfe, orphan_name, | |
1312 | orphan_entry_bh); | |
1313 | if (status < 0) { | |
1314 | mlog_errno(status); | |
1315 | goto bail; | |
1316 | } | |
1317 | } | |
1318 | ||
1319 | /* change the dirent to point to the correct inode */ | |
1320 | status = ocfs2_journal_access(handle, new_dir, new_de_bh, | |
1321 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1322 | if (status < 0) { | |
1323 | mlog_errno(status); | |
1324 | goto bail; | |
1325 | } | |
1326 | new_de->inode = cpu_to_le64(OCFS2_I(old_inode)->ip_blkno); | |
1327 | new_de->file_type = old_de->file_type; | |
1328 | new_dir->i_version++; | |
1329 | status = ocfs2_journal_dirty(handle, new_de_bh); | |
1330 | if (status < 0) { | |
1331 | mlog_errno(status); | |
1332 | goto bail; | |
1333 | } | |
1334 | ||
1335 | if (S_ISDIR(new_inode->i_mode)) | |
1336 | newfe->i_links_count = 0; | |
1337 | else | |
1338 | le16_add_cpu(&newfe->i_links_count, -1); | |
1339 | ||
1340 | status = ocfs2_journal_dirty(handle, newfe_bh); | |
1341 | if (status < 0) { | |
1342 | mlog_errno(status); | |
1343 | goto bail; | |
1344 | } | |
1345 | } else { | |
1346 | /* if the name was not found in new_dir, add it now */ | |
1347 | status = ocfs2_add_entry(handle, new_dentry, old_inode, | |
1348 | OCFS2_I(old_inode)->ip_blkno, | |
1349 | new_dir_bh, insert_entry_bh); | |
1350 | } | |
1351 | ||
1352 | old_inode->i_ctime = CURRENT_TIME; | |
1353 | mark_inode_dirty(old_inode); | |
1354 | ||
1355 | /* now that the name has been added to new_dir, remove the old name */ | |
1356 | status = ocfs2_delete_entry(handle, old_dir, old_de, old_de_bh); | |
1357 | if (status < 0) { | |
1358 | mlog_errno(status); | |
1359 | goto bail; | |
1360 | } | |
1361 | ||
1362 | if (new_inode) { | |
1363 | new_inode->i_nlink--; | |
1364 | new_inode->i_ctime = CURRENT_TIME; | |
1365 | } | |
1366 | old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME; | |
1367 | if (old_inode_de_bh) { | |
1368 | status = ocfs2_journal_access(handle, old_inode, | |
1369 | old_inode_de_bh, | |
1370 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1371 | PARENT_INO(old_inode_de_bh->b_data) = | |
1372 | cpu_to_le64(OCFS2_I(new_dir)->ip_blkno); | |
1373 | status = ocfs2_journal_dirty(handle, old_inode_de_bh); | |
1374 | old_dir->i_nlink--; | |
1375 | if (new_inode) { | |
1376 | new_inode->i_nlink--; | |
1377 | } else { | |
d8c76e6f | 1378 | inc_nlink(new_dir); |
ccd979bd MF |
1379 | mark_inode_dirty(new_dir); |
1380 | } | |
1381 | } | |
1382 | mark_inode_dirty(old_dir); | |
1383 | if (new_inode) | |
1384 | mark_inode_dirty(new_inode); | |
1385 | ||
1386 | if (old_dir != new_dir) | |
1387 | if (new_dir_nlink != new_dir->i_nlink) { | |
1388 | if (!new_dir_bh) { | |
1389 | mlog(ML_ERROR, "need to change nlink for new " | |
b0697053 MF |
1390 | "dir %llu from %d to %d but bh is NULL\n", |
1391 | (unsigned long long)OCFS2_I(new_dir)->ip_blkno, | |
ccd979bd MF |
1392 | (int)new_dir_nlink, new_dir->i_nlink); |
1393 | } else { | |
1394 | struct ocfs2_dinode *fe; | |
1395 | status = ocfs2_journal_access(handle, | |
1396 | new_dir, | |
1397 | new_dir_bh, | |
1398 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1399 | fe = (struct ocfs2_dinode *) new_dir_bh->b_data; | |
1400 | fe->i_links_count = cpu_to_le16(new_dir->i_nlink); | |
1401 | status = ocfs2_journal_dirty(handle, new_dir_bh); | |
1402 | } | |
1403 | } | |
1404 | ||
1405 | if (old_dir_nlink != old_dir->i_nlink) { | |
1406 | if (!old_dir_bh) { | |
1407 | mlog(ML_ERROR, "need to change nlink for old dir " | |
b0697053 MF |
1408 | "%llu from %d to %d but bh is NULL!\n", |
1409 | (unsigned long long)OCFS2_I(old_dir)->ip_blkno, | |
1410 | (int)old_dir_nlink, old_dir->i_nlink); | |
ccd979bd MF |
1411 | } else { |
1412 | struct ocfs2_dinode *fe; | |
1413 | status = ocfs2_journal_access(handle, old_dir, | |
1414 | old_dir_bh, | |
1415 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1416 | fe = (struct ocfs2_dinode *) old_dir_bh->b_data; | |
1417 | fe->i_links_count = cpu_to_le16(old_dir->i_nlink); | |
1418 | status = ocfs2_journal_dirty(handle, old_dir_bh); | |
1419 | } | |
1420 | } | |
1421 | ||
379dfe9d | 1422 | ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); |
ccd979bd MF |
1423 | status = 0; |
1424 | bail: | |
1425 | if (rename_lock) | |
1426 | ocfs2_rename_unlock(osb); | |
1427 | ||
1428 | if (handle) | |
1429 | ocfs2_commit_trans(handle); | |
1430 | ||
1431 | if (new_inode) | |
1432 | sync_mapping_buffers(old_inode->i_mapping); | |
1433 | ||
1434 | if (new_inode) | |
1435 | iput(new_inode); | |
1436 | if (newfe_bh) | |
1437 | brelse(newfe_bh); | |
1438 | if (old_dir_bh) | |
1439 | brelse(old_dir_bh); | |
1440 | if (new_dir_bh) | |
1441 | brelse(new_dir_bh); | |
1442 | if (new_de_bh) | |
1443 | brelse(new_de_bh); | |
1444 | if (old_de_bh) | |
1445 | brelse(old_de_bh); | |
1446 | if (old_inode_de_bh) | |
1447 | brelse(old_inode_de_bh); | |
1448 | if (orphan_entry_bh) | |
1449 | brelse(orphan_entry_bh); | |
1450 | if (insert_entry_bh) | |
1451 | brelse(insert_entry_bh); | |
1452 | ||
1453 | mlog_exit(status); | |
1454 | ||
1455 | return status; | |
1456 | } | |
1457 | ||
1458 | /* | |
1459 | * we expect i_size = strlen(symname). Copy symname into the file | |
1460 | * data, including the null terminator. | |
1461 | */ | |
1462 | static int ocfs2_create_symlink_data(struct ocfs2_super *osb, | |
1463 | struct ocfs2_journal_handle *handle, | |
1464 | struct inode *inode, | |
1465 | const char *symname) | |
1466 | { | |
1467 | struct buffer_head **bhs = NULL; | |
1468 | const char *c; | |
1469 | struct super_block *sb = osb->sb; | |
1470 | u64 p_blkno; | |
1471 | int p_blocks; | |
1472 | int virtual, blocks, status, i, bytes_left; | |
1473 | ||
1474 | bytes_left = i_size_read(inode) + 1; | |
1475 | /* we can't trust i_blocks because we're actually going to | |
1476 | * write i_size + 1 bytes. */ | |
1477 | blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; | |
1478 | ||
5515eff8 AM |
1479 | mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n", |
1480 | (unsigned long long)inode->i_blocks, | |
1481 | i_size_read(inode), blocks); | |
ccd979bd MF |
1482 | |
1483 | /* Sanity check -- make sure we're going to fit. */ | |
1484 | if (bytes_left > | |
1485 | ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { | |
1486 | status = -EIO; | |
1487 | mlog_errno(status); | |
1488 | goto bail; | |
1489 | } | |
1490 | ||
1491 | bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); | |
1492 | if (!bhs) { | |
1493 | status = -ENOMEM; | |
1494 | mlog_errno(status); | |
1495 | goto bail; | |
1496 | } | |
1497 | ||
1498 | status = ocfs2_extent_map_get_blocks(inode, 0, 1, &p_blkno, | |
1499 | &p_blocks); | |
1500 | if (status < 0) { | |
1501 | mlog_errno(status); | |
1502 | goto bail; | |
1503 | } | |
1504 | ||
1505 | /* links can never be larger than one cluster so we know this | |
1506 | * is all going to be contiguous, but do a sanity check | |
1507 | * anyway. */ | |
1508 | if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { | |
1509 | status = -EIO; | |
1510 | mlog_errno(status); | |
1511 | goto bail; | |
1512 | } | |
1513 | ||
1514 | virtual = 0; | |
1515 | while(bytes_left > 0) { | |
1516 | c = &symname[virtual * sb->s_blocksize]; | |
1517 | ||
1518 | bhs[virtual] = sb_getblk(sb, p_blkno); | |
1519 | if (!bhs[virtual]) { | |
1520 | status = -ENOMEM; | |
1521 | mlog_errno(status); | |
1522 | goto bail; | |
1523 | } | |
1524 | ocfs2_set_new_buffer_uptodate(inode, bhs[virtual]); | |
1525 | ||
1526 | status = ocfs2_journal_access(handle, inode, bhs[virtual], | |
1527 | OCFS2_JOURNAL_ACCESS_CREATE); | |
1528 | if (status < 0) { | |
1529 | mlog_errno(status); | |
1530 | goto bail; | |
1531 | } | |
1532 | ||
1533 | memset(bhs[virtual]->b_data, 0, sb->s_blocksize); | |
1534 | ||
1535 | memcpy(bhs[virtual]->b_data, c, | |
1536 | (bytes_left > sb->s_blocksize) ? sb->s_blocksize : | |
1537 | bytes_left); | |
1538 | ||
1539 | status = ocfs2_journal_dirty(handle, bhs[virtual]); | |
1540 | if (status < 0) { | |
1541 | mlog_errno(status); | |
1542 | goto bail; | |
1543 | } | |
1544 | ||
1545 | virtual++; | |
1546 | p_blkno++; | |
1547 | bytes_left -= sb->s_blocksize; | |
1548 | } | |
1549 | ||
1550 | status = 0; | |
1551 | bail: | |
1552 | ||
1553 | if (bhs) { | |
1554 | for(i = 0; i < blocks; i++) | |
1555 | if (bhs[i]) | |
1556 | brelse(bhs[i]); | |
1557 | kfree(bhs); | |
1558 | } | |
1559 | ||
1560 | mlog_exit(status); | |
1561 | return status; | |
1562 | } | |
1563 | ||
1564 | static int ocfs2_symlink(struct inode *dir, | |
1565 | struct dentry *dentry, | |
1566 | const char *symname) | |
1567 | { | |
1568 | int status, l, credits; | |
1569 | u64 newsize; | |
1570 | struct ocfs2_super *osb = NULL; | |
1571 | struct inode *inode = NULL; | |
1572 | struct super_block *sb; | |
1573 | struct buffer_head *new_fe_bh = NULL; | |
1574 | struct buffer_head *de_bh = NULL; | |
1575 | struct buffer_head *parent_fe_bh = NULL; | |
1576 | struct ocfs2_dinode *fe = NULL; | |
1577 | struct ocfs2_dinode *dirfe; | |
1578 | struct ocfs2_journal_handle *handle = NULL; | |
1579 | struct ocfs2_alloc_context *inode_ac = NULL; | |
1580 | struct ocfs2_alloc_context *data_ac = NULL; | |
1581 | ||
1582 | mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir, | |
1583 | dentry, symname, dentry->d_name.len, dentry->d_name.name); | |
1584 | ||
1585 | sb = dir->i_sb; | |
1586 | osb = OCFS2_SB(sb); | |
1587 | ||
1588 | l = strlen(symname) + 1; | |
1589 | ||
1590 | credits = ocfs2_calc_symlink_credits(sb); | |
1591 | ||
1592 | handle = ocfs2_alloc_handle(osb); | |
1593 | if (handle == NULL) { | |
1594 | status = -ENOMEM; | |
1595 | mlog_errno(status); | |
1596 | goto bail; | |
1597 | } | |
1598 | ||
1599 | /* lock the parent directory */ | |
1600 | status = ocfs2_meta_lock(dir, handle, &parent_fe_bh, 1); | |
1601 | if (status < 0) { | |
1602 | if (status != -ENOENT) | |
1603 | mlog_errno(status); | |
1604 | goto bail; | |
1605 | } | |
1606 | ||
1607 | dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; | |
1608 | if (!dirfe->i_links_count) { | |
1609 | /* can't make a file in a deleted directory. */ | |
1610 | status = -ENOENT; | |
1611 | goto bail; | |
1612 | } | |
1613 | ||
1614 | status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, | |
1615 | dentry->d_name.len); | |
1616 | if (status) | |
1617 | goto bail; | |
1618 | ||
1619 | status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, | |
1620 | dentry->d_name.name, | |
1621 | dentry->d_name.len, &de_bh); | |
1622 | if (status < 0) { | |
1623 | mlog_errno(status); | |
1624 | goto bail; | |
1625 | } | |
1626 | ||
1627 | status = ocfs2_reserve_new_inode(osb, handle, &inode_ac); | |
1628 | if (status < 0) { | |
1629 | if (status != -ENOSPC) | |
1630 | mlog_errno(status); | |
1631 | goto bail; | |
1632 | } | |
1633 | ||
1634 | /* don't reserve bitmap space for fast symlinks. */ | |
1635 | if (l > ocfs2_fast_symlink_chars(sb)) { | |
1636 | status = ocfs2_reserve_clusters(osb, handle, 1, &data_ac); | |
1637 | if (status < 0) { | |
1638 | if (status != -ENOSPC) | |
1639 | mlog_errno(status); | |
1640 | goto bail; | |
1641 | } | |
1642 | } | |
1643 | ||
1644 | handle = ocfs2_start_trans(osb, handle, credits); | |
1645 | if (IS_ERR(handle)) { | |
1646 | status = PTR_ERR(handle); | |
1647 | handle = NULL; | |
1648 | mlog_errno(status); | |
1649 | goto bail; | |
1650 | } | |
1651 | ||
1652 | status = ocfs2_mknod_locked(osb, dir, dentry, | |
1653 | S_IFLNK | S_IRWXUGO, 0, | |
1654 | &new_fe_bh, parent_fe_bh, handle, | |
1655 | &inode, inode_ac); | |
1656 | if (status < 0) { | |
1657 | mlog_errno(status); | |
1658 | goto bail; | |
1659 | } | |
1660 | ||
1661 | fe = (struct ocfs2_dinode *) new_fe_bh->b_data; | |
1662 | inode->i_rdev = 0; | |
1663 | newsize = l - 1; | |
1664 | if (l > ocfs2_fast_symlink_chars(sb)) { | |
1665 | inode->i_op = &ocfs2_symlink_inode_operations; | |
1666 | status = ocfs2_do_extend_allocation(osb, inode, 1, new_fe_bh, | |
1667 | handle, data_ac, NULL, | |
1668 | NULL); | |
1669 | if (status < 0) { | |
1670 | if (status != -ENOSPC && status != -EINTR) { | |
b0697053 MF |
1671 | mlog(ML_ERROR, |
1672 | "Failed to extend file to %llu\n", | |
1673 | (unsigned long long)newsize); | |
ccd979bd MF |
1674 | mlog_errno(status); |
1675 | status = -ENOSPC; | |
1676 | } | |
1677 | goto bail; | |
1678 | } | |
1679 | i_size_write(inode, newsize); | |
1680 | inode->i_blocks = ocfs2_align_bytes_to_sectors(newsize); | |
1681 | } else { | |
1682 | inode->i_op = &ocfs2_fast_symlink_inode_operations; | |
1683 | memcpy((char *) fe->id2.i_symlink, symname, l); | |
1684 | i_size_write(inode, newsize); | |
1685 | inode->i_blocks = 0; | |
1686 | } | |
1687 | ||
1688 | status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); | |
1689 | if (status < 0) { | |
1690 | mlog_errno(status); | |
1691 | goto bail; | |
1692 | } | |
1693 | ||
1694 | if (!ocfs2_inode_is_fast_symlink(inode)) { | |
1695 | status = ocfs2_create_symlink_data(osb, handle, inode, | |
1696 | symname); | |
1697 | if (status < 0) { | |
1698 | mlog_errno(status); | |
1699 | goto bail; | |
1700 | } | |
1701 | } | |
1702 | ||
1703 | status = ocfs2_add_entry(handle, dentry, inode, | |
1704 | le64_to_cpu(fe->i_blkno), parent_fe_bh, | |
1705 | de_bh); | |
1706 | if (status < 0) { | |
1707 | mlog_errno(status); | |
1708 | goto bail; | |
1709 | } | |
1710 | ||
0027dd5b | 1711 | status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); |
379dfe9d MF |
1712 | if (status) { |
1713 | mlog_errno(status); | |
1714 | goto bail; | |
1715 | } | |
1716 | ||
ccd979bd MF |
1717 | insert_inode_hash(inode); |
1718 | dentry->d_op = &ocfs2_dentry_ops; | |
1719 | d_instantiate(dentry, inode); | |
1720 | bail: | |
1721 | if (handle) | |
1722 | ocfs2_commit_trans(handle); | |
1723 | if (new_fe_bh) | |
1724 | brelse(new_fe_bh); | |
1725 | if (parent_fe_bh) | |
1726 | brelse(parent_fe_bh); | |
1727 | if (de_bh) | |
1728 | brelse(de_bh); | |
1729 | if (inode_ac) | |
1730 | ocfs2_free_alloc_context(inode_ac); | |
1731 | if (data_ac) | |
1732 | ocfs2_free_alloc_context(data_ac); | |
1733 | if ((status < 0) && inode) | |
1734 | iput(inode); | |
1735 | ||
1736 | mlog_exit(status); | |
1737 | ||
1738 | return status; | |
1739 | } | |
1740 | ||
1741 | int ocfs2_check_dir_entry(struct inode * dir, | |
1742 | struct ocfs2_dir_entry * de, | |
1743 | struct buffer_head * bh, | |
1744 | unsigned long offset) | |
1745 | { | |
1746 | const char *error_msg = NULL; | |
1747 | const int rlen = le16_to_cpu(de->rec_len); | |
1748 | ||
1749 | if (rlen < OCFS2_DIR_REC_LEN(1)) | |
1750 | error_msg = "rec_len is smaller than minimal"; | |
1751 | else if (rlen % 4 != 0) | |
1752 | error_msg = "rec_len % 4 != 0"; | |
1753 | else if (rlen < OCFS2_DIR_REC_LEN(de->name_len)) | |
1754 | error_msg = "rec_len is too small for name_len"; | |
1755 | else if (((char *) de - bh->b_data) + rlen > dir->i_sb->s_blocksize) | |
1756 | error_msg = "directory entry across blocks"; | |
1757 | ||
1758 | if (error_msg != NULL) | |
b0697053 MF |
1759 | mlog(ML_ERROR, "bad entry in directory #%llu: %s - " |
1760 | "offset=%lu, inode=%llu, rec_len=%d, name_len=%d\n", | |
1761 | (unsigned long long)OCFS2_I(dir)->ip_blkno, error_msg, | |
1762 | offset, (unsigned long long)le64_to_cpu(de->inode), rlen, | |
1763 | de->name_len); | |
ccd979bd MF |
1764 | return error_msg == NULL ? 1 : 0; |
1765 | } | |
1766 | ||
1767 | /* we don't always have a dentry for what we want to add, so people | |
1768 | * like orphan dir can call this instead. | |
1769 | * | |
1770 | * If you pass me insert_bh, I'll skip the search of the other dir | |
1771 | * blocks and put the record in there. | |
1772 | */ | |
1773 | static int __ocfs2_add_entry(struct ocfs2_journal_handle *handle, | |
1774 | struct inode *dir, | |
1775 | const char *name, int namelen, | |
1776 | struct inode *inode, u64 blkno, | |
1777 | struct buffer_head *parent_fe_bh, | |
1778 | struct buffer_head *insert_bh) | |
1779 | { | |
1780 | unsigned long offset; | |
1781 | unsigned short rec_len; | |
1782 | struct ocfs2_dir_entry *de, *de1; | |
1783 | struct super_block *sb; | |
1784 | int retval, status; | |
1785 | ||
1786 | mlog_entry_void(); | |
1787 | ||
1788 | sb = dir->i_sb; | |
1789 | ||
1790 | if (!namelen) | |
1791 | return -EINVAL; | |
1792 | ||
1793 | rec_len = OCFS2_DIR_REC_LEN(namelen); | |
1794 | offset = 0; | |
1795 | de = (struct ocfs2_dir_entry *) insert_bh->b_data; | |
1796 | while (1) { | |
1797 | BUG_ON((char *)de >= sb->s_blocksize + insert_bh->b_data); | |
1798 | /* These checks should've already been passed by the | |
1799 | * prepare function, but I guess we can leave them | |
1800 | * here anyway. */ | |
1801 | if (!ocfs2_check_dir_entry(dir, de, insert_bh, offset)) { | |
1802 | retval = -ENOENT; | |
1803 | goto bail; | |
1804 | } | |
1805 | if (ocfs2_match(namelen, name, de)) { | |
1806 | retval = -EEXIST; | |
1807 | goto bail; | |
1808 | } | |
1809 | if (((le64_to_cpu(de->inode) == 0) && | |
1810 | (le16_to_cpu(de->rec_len) >= rec_len)) || | |
1811 | (le16_to_cpu(de->rec_len) >= | |
1812 | (OCFS2_DIR_REC_LEN(de->name_len) + rec_len))) { | |
1813 | status = ocfs2_journal_access(handle, dir, insert_bh, | |
1814 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1815 | /* By now the buffer is marked for journaling */ | |
1816 | offset += le16_to_cpu(de->rec_len); | |
1817 | if (le64_to_cpu(de->inode)) { | |
1818 | de1 = (struct ocfs2_dir_entry *)((char *) de + | |
1819 | OCFS2_DIR_REC_LEN(de->name_len)); | |
1820 | de1->rec_len = | |
1821 | cpu_to_le16(le16_to_cpu(de->rec_len) - | |
1822 | OCFS2_DIR_REC_LEN(de->name_len)); | |
1823 | de->rec_len = cpu_to_le16(OCFS2_DIR_REC_LEN(de->name_len)); | |
1824 | de = de1; | |
1825 | } | |
1826 | de->file_type = OCFS2_FT_UNKNOWN; | |
1827 | if (blkno) { | |
1828 | de->inode = cpu_to_le64(blkno); | |
1829 | ocfs2_set_de_type(de, inode->i_mode); | |
1830 | } else | |
1831 | de->inode = 0; | |
1832 | de->name_len = namelen; | |
1833 | memcpy(de->name, name, namelen); | |
1834 | ||
1835 | dir->i_mtime = dir->i_ctime = CURRENT_TIME; | |
1836 | dir->i_version++; | |
1837 | status = ocfs2_journal_dirty(handle, insert_bh); | |
1838 | retval = 0; | |
1839 | goto bail; | |
1840 | } | |
1841 | offset += le16_to_cpu(de->rec_len); | |
1842 | de = (struct ocfs2_dir_entry *) ((char *) de + le16_to_cpu(de->rec_len)); | |
1843 | } | |
1844 | ||
1845 | /* when you think about it, the assert above should prevent us | |
1846 | * from ever getting here. */ | |
1847 | retval = -ENOSPC; | |
1848 | bail: | |
1849 | ||
1850 | mlog_exit(retval); | |
1851 | return retval; | |
1852 | } | |
1853 | ||
1854 | ||
1855 | /* | |
1856 | * ocfs2_delete_entry deletes a directory entry by merging it with the | |
1857 | * previous entry | |
1858 | */ | |
1859 | static int ocfs2_delete_entry(struct ocfs2_journal_handle *handle, | |
1860 | struct inode *dir, | |
1861 | struct ocfs2_dir_entry *de_del, | |
1862 | struct buffer_head *bh) | |
1863 | { | |
1864 | struct ocfs2_dir_entry *de, *pde; | |
1865 | int i, status = -ENOENT; | |
1866 | ||
1867 | mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p)\n", handle, dir, de_del, bh); | |
1868 | ||
1869 | i = 0; | |
1870 | pde = NULL; | |
1871 | de = (struct ocfs2_dir_entry *) bh->b_data; | |
1872 | while (i < bh->b_size) { | |
1873 | if (!ocfs2_check_dir_entry(dir, de, bh, i)) { | |
1874 | status = -EIO; | |
1875 | mlog_errno(status); | |
1876 | goto bail; | |
1877 | } | |
1878 | if (de == de_del) { | |
1879 | status = ocfs2_journal_access(handle, dir, bh, | |
1880 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1881 | if (status < 0) { | |
1882 | status = -EIO; | |
1883 | mlog_errno(status); | |
1884 | goto bail; | |
1885 | } | |
1886 | if (pde) | |
1887 | pde->rec_len = | |
1888 | cpu_to_le16(le16_to_cpu(pde->rec_len) + | |
1889 | le16_to_cpu(de->rec_len)); | |
1890 | else | |
1891 | de->inode = 0; | |
1892 | dir->i_version++; | |
1893 | status = ocfs2_journal_dirty(handle, bh); | |
1894 | goto bail; | |
1895 | } | |
1896 | i += le16_to_cpu(de->rec_len); | |
1897 | pde = de; | |
1898 | de = (struct ocfs2_dir_entry *)((char *)de + le16_to_cpu(de->rec_len)); | |
1899 | } | |
1900 | bail: | |
1901 | mlog_exit(status); | |
1902 | return status; | |
1903 | } | |
1904 | ||
1905 | /* | |
1906 | * Returns 0 if not found, -1 on failure, and 1 on success | |
1907 | */ | |
1908 | static int inline ocfs2_search_dirblock(struct buffer_head *bh, | |
1909 | struct inode *dir, | |
1910 | const char *name, int namelen, | |
1911 | unsigned long offset, | |
1912 | struct ocfs2_dir_entry **res_dir) | |
1913 | { | |
1914 | struct ocfs2_dir_entry *de; | |
1915 | char *dlimit, *de_buf; | |
1916 | int de_len; | |
1917 | int ret = 0; | |
1918 | ||
1919 | mlog_entry_void(); | |
1920 | ||
1921 | de_buf = bh->b_data; | |
1922 | dlimit = de_buf + dir->i_sb->s_blocksize; | |
1923 | ||
1924 | while (de_buf < dlimit) { | |
1925 | /* this code is executed quadratically often */ | |
1926 | /* do minimal checking `by hand' */ | |
1927 | ||
1928 | de = (struct ocfs2_dir_entry *) de_buf; | |
1929 | ||
1930 | if (de_buf + namelen <= dlimit && | |
1931 | ocfs2_match(namelen, name, de)) { | |
1932 | /* found a match - just to be sure, do a full check */ | |
1933 | if (!ocfs2_check_dir_entry(dir, de, bh, offset)) { | |
1934 | ret = -1; | |
1935 | goto bail; | |
1936 | } | |
1937 | *res_dir = de; | |
1938 | ret = 1; | |
1939 | goto bail; | |
1940 | } | |
1941 | ||
1942 | /* prevent looping on a bad block */ | |
1943 | de_len = le16_to_cpu(de->rec_len); | |
1944 | if (de_len <= 0) { | |
1945 | ret = -1; | |
1946 | goto bail; | |
1947 | } | |
1948 | ||
1949 | de_buf += de_len; | |
1950 | offset += de_len; | |
1951 | } | |
1952 | ||
1953 | bail: | |
1954 | mlog_exit(ret); | |
1955 | return ret; | |
1956 | } | |
1957 | ||
1958 | struct buffer_head *ocfs2_find_entry(const char *name, int namelen, | |
1959 | struct inode *dir, | |
1960 | struct ocfs2_dir_entry **res_dir) | |
1961 | { | |
1962 | struct super_block *sb; | |
1963 | struct buffer_head *bh_use[NAMEI_RA_SIZE]; | |
1964 | struct buffer_head *bh, *ret = NULL; | |
1965 | unsigned long start, block, b; | |
1966 | int ra_max = 0; /* Number of bh's in the readahead | |
1967 | buffer, bh_use[] */ | |
1968 | int ra_ptr = 0; /* Current index into readahead | |
1969 | buffer */ | |
1970 | int num = 0; | |
1971 | int nblocks, i, err; | |
1972 | ||
1973 | mlog_entry_void(); | |
1974 | ||
1975 | *res_dir = NULL; | |
1976 | sb = dir->i_sb; | |
1977 | ||
1978 | nblocks = i_size_read(dir) >> sb->s_blocksize_bits; | |
1979 | start = OCFS2_I(dir)->ip_dir_start_lookup; | |
1980 | if (start >= nblocks) | |
1981 | start = 0; | |
1982 | block = start; | |
1983 | ||
1984 | restart: | |
1985 | do { | |
1986 | /* | |
1987 | * We deal with the read-ahead logic here. | |
1988 | */ | |
1989 | if (ra_ptr >= ra_max) { | |
1990 | /* Refill the readahead buffer */ | |
1991 | ra_ptr = 0; | |
1992 | b = block; | |
1993 | for (ra_max = 0; ra_max < NAMEI_RA_SIZE; ra_max++) { | |
1994 | /* | |
1995 | * Terminate if we reach the end of the | |
1996 | * directory and must wrap, or if our | |
1997 | * search has finished at this block. | |
1998 | */ | |
1999 | if (b >= nblocks || (num && block == start)) { | |
2000 | bh_use[ra_max] = NULL; | |
2001 | break; | |
2002 | } | |
2003 | num++; | |
2004 | ||
ccd979bd MF |
2005 | bh = ocfs2_bread(dir, b++, &err, 1); |
2006 | bh_use[ra_max] = bh; | |
ccd979bd MF |
2007 | } |
2008 | } | |
2009 | if ((bh = bh_use[ra_ptr++]) == NULL) | |
2010 | goto next; | |
2011 | wait_on_buffer(bh); | |
2012 | if (!buffer_uptodate(bh)) { | |
2013 | /* read error, skip block & hope for the best */ | |
aa958874 MF |
2014 | ocfs2_error(dir->i_sb, "reading directory %llu, " |
2015 | "offset %lu\n", | |
2016 | (unsigned long long)OCFS2_I(dir)->ip_blkno, | |
2017 | block); | |
ccd979bd MF |
2018 | brelse(bh); |
2019 | goto next; | |
2020 | } | |
2021 | i = ocfs2_search_dirblock(bh, dir, name, namelen, | |
2022 | block << sb->s_blocksize_bits, | |
2023 | res_dir); | |
2024 | if (i == 1) { | |
2025 | OCFS2_I(dir)->ip_dir_start_lookup = block; | |
2026 | ret = bh; | |
2027 | goto cleanup_and_exit; | |
2028 | } else { | |
2029 | brelse(bh); | |
2030 | if (i < 0) | |
2031 | goto cleanup_and_exit; | |
2032 | } | |
2033 | next: | |
2034 | if (++block >= nblocks) | |
2035 | block = 0; | |
2036 | } while (block != start); | |
2037 | ||
2038 | /* | |
2039 | * If the directory has grown while we were searching, then | |
2040 | * search the last part of the directory before giving up. | |
2041 | */ | |
2042 | block = nblocks; | |
2043 | nblocks = i_size_read(dir) >> sb->s_blocksize_bits; | |
2044 | if (block < nblocks) { | |
2045 | start = 0; | |
2046 | goto restart; | |
2047 | } | |
2048 | ||
2049 | cleanup_and_exit: | |
2050 | /* Clean up the read-ahead blocks */ | |
2051 | for (; ra_ptr < ra_max; ra_ptr++) | |
2052 | brelse(bh_use[ra_ptr]); | |
2053 | ||
2054 | mlog_exit_ptr(ret); | |
2055 | return ret; | |
2056 | } | |
2057 | ||
2058 | static int ocfs2_blkno_stringify(u64 blkno, char *name) | |
2059 | { | |
2060 | int status, namelen; | |
2061 | ||
2062 | mlog_entry_void(); | |
2063 | ||
b0697053 MF |
2064 | namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", |
2065 | (long long)blkno); | |
ccd979bd MF |
2066 | if (namelen <= 0) { |
2067 | if (namelen) | |
2068 | status = namelen; | |
2069 | else | |
2070 | status = -EINVAL; | |
2071 | mlog_errno(status); | |
2072 | goto bail; | |
2073 | } | |
2074 | if (namelen != OCFS2_ORPHAN_NAMELEN) { | |
2075 | status = -EINVAL; | |
2076 | mlog_errno(status); | |
2077 | goto bail; | |
2078 | } | |
2079 | ||
2080 | mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name, | |
2081 | namelen); | |
2082 | ||
2083 | status = 0; | |
2084 | bail: | |
2085 | mlog_exit(status); | |
2086 | return status; | |
2087 | } | |
2088 | ||
2089 | static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, | |
2090 | struct ocfs2_journal_handle *handle, | |
2091 | struct inode *inode, | |
2092 | char *name, | |
2093 | struct buffer_head **de_bh) | |
2094 | { | |
2095 | struct inode *orphan_dir_inode = NULL; | |
2096 | struct buffer_head *orphan_dir_bh = NULL; | |
2097 | int status = 0; | |
2098 | ||
2099 | status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); | |
2100 | if (status < 0) { | |
2101 | mlog_errno(status); | |
2102 | goto leave; | |
2103 | } | |
2104 | ||
2105 | orphan_dir_inode = ocfs2_get_system_file_inode(osb, | |
2106 | ORPHAN_DIR_SYSTEM_INODE, | |
2107 | osb->slot_num); | |
2108 | if (!orphan_dir_inode) { | |
2109 | status = -ENOENT; | |
2110 | mlog_errno(status); | |
2111 | goto leave; | |
2112 | } | |
2113 | ||
2114 | ocfs2_handle_add_inode(handle, orphan_dir_inode); | |
2115 | status = ocfs2_meta_lock(orphan_dir_inode, handle, &orphan_dir_bh, 1); | |
2116 | if (status < 0) { | |
2117 | mlog_errno(status); | |
2118 | goto leave; | |
2119 | } | |
2120 | ||
2121 | status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, | |
2122 | orphan_dir_bh, name, | |
2123 | OCFS2_ORPHAN_NAMELEN, de_bh); | |
2124 | if (status < 0) { | |
2125 | mlog_errno(status); | |
2126 | goto leave; | |
2127 | } | |
2128 | ||
2129 | leave: | |
2130 | if (orphan_dir_inode) | |
2131 | iput(orphan_dir_inode); | |
2132 | ||
2133 | if (orphan_dir_bh) | |
2134 | brelse(orphan_dir_bh); | |
2135 | ||
2136 | mlog_exit(status); | |
2137 | return status; | |
2138 | } | |
2139 | ||
2140 | static int ocfs2_orphan_add(struct ocfs2_super *osb, | |
2141 | struct ocfs2_journal_handle *handle, | |
2142 | struct inode *inode, | |
2143 | struct ocfs2_dinode *fe, | |
2144 | char *name, | |
2145 | struct buffer_head *de_bh) | |
2146 | { | |
2147 | struct inode *orphan_dir_inode = NULL; | |
2148 | struct buffer_head *orphan_dir_bh = NULL; | |
2149 | int status = 0; | |
2150 | struct ocfs2_dinode *orphan_fe; | |
2151 | ||
2152 | mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino); | |
2153 | ||
2154 | orphan_dir_inode = ocfs2_get_system_file_inode(osb, | |
2155 | ORPHAN_DIR_SYSTEM_INODE, | |
2156 | osb->slot_num); | |
2157 | if (!orphan_dir_inode) { | |
2158 | status = -ENOENT; | |
2159 | mlog_errno(status); | |
2160 | goto leave; | |
2161 | } | |
2162 | ||
2163 | status = ocfs2_read_block(osb, | |
2164 | OCFS2_I(orphan_dir_inode)->ip_blkno, | |
2165 | &orphan_dir_bh, OCFS2_BH_CACHED, | |
2166 | orphan_dir_inode); | |
2167 | if (status < 0) { | |
2168 | mlog_errno(status); | |
2169 | goto leave; | |
2170 | } | |
2171 | ||
2172 | status = ocfs2_journal_access(handle, orphan_dir_inode, orphan_dir_bh, | |
2173 | OCFS2_JOURNAL_ACCESS_WRITE); | |
2174 | if (status < 0) { | |
2175 | mlog_errno(status); | |
2176 | goto leave; | |
2177 | } | |
2178 | ||
2179 | /* we're a cluster, and nlink can change on disk from | |
2180 | * underneath us... */ | |
2181 | orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; | |
2182 | if (S_ISDIR(inode->i_mode)) | |
2183 | le16_add_cpu(&orphan_fe->i_links_count, 1); | |
2184 | orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count); | |
2185 | ||
2186 | status = ocfs2_journal_dirty(handle, orphan_dir_bh); | |
2187 | if (status < 0) { | |
2188 | mlog_errno(status); | |
2189 | goto leave; | |
2190 | } | |
2191 | ||
2192 | status = __ocfs2_add_entry(handle, orphan_dir_inode, name, | |
2193 | OCFS2_ORPHAN_NAMELEN, inode, | |
2194 | OCFS2_I(inode)->ip_blkno, | |
2195 | orphan_dir_bh, de_bh); | |
2196 | if (status < 0) { | |
2197 | mlog_errno(status); | |
2198 | goto leave; | |
2199 | } | |
2200 | ||
2201 | le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL); | |
2202 | ||
2203 | /* Record which orphan dir our inode now resides | |
2204 | * in. delete_inode will use this to determine which orphan | |
2205 | * dir to lock. */ | |
2206 | spin_lock(&OCFS2_I(inode)->ip_lock); | |
2207 | OCFS2_I(inode)->ip_orphaned_slot = osb->slot_num; | |
2208 | spin_unlock(&OCFS2_I(inode)->ip_lock); | |
2209 | ||
b0697053 MF |
2210 | mlog(0, "Inode %llu orphaned in slot %d\n", |
2211 | (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num); | |
ccd979bd MF |
2212 | |
2213 | leave: | |
2214 | if (orphan_dir_inode) | |
2215 | iput(orphan_dir_inode); | |
2216 | ||
2217 | if (orphan_dir_bh) | |
2218 | brelse(orphan_dir_bh); | |
2219 | ||
2220 | mlog_exit(status); | |
2221 | return status; | |
2222 | } | |
2223 | ||
2224 | /* unlike orphan_add, we expect the orphan dir to already be locked here. */ | |
2225 | int ocfs2_orphan_del(struct ocfs2_super *osb, | |
2226 | struct ocfs2_journal_handle *handle, | |
2227 | struct inode *orphan_dir_inode, | |
2228 | struct inode *inode, | |
2229 | struct buffer_head *orphan_dir_bh) | |
2230 | { | |
2231 | char name[OCFS2_ORPHAN_NAMELEN + 1]; | |
2232 | struct ocfs2_dinode *orphan_fe; | |
2233 | int status = 0; | |
2234 | struct buffer_head *target_de_bh = NULL; | |
2235 | struct ocfs2_dir_entry *target_de = NULL; | |
2236 | ||
2237 | mlog_entry_void(); | |
2238 | ||
2239 | status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); | |
2240 | if (status < 0) { | |
2241 | mlog_errno(status); | |
2242 | goto leave; | |
2243 | } | |
2244 | ||
b0697053 MF |
2245 | mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n", |
2246 | name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, | |
2247 | OCFS2_ORPHAN_NAMELEN); | |
ccd979bd MF |
2248 | |
2249 | /* find it's spot in the orphan directory */ | |
2250 | target_de_bh = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, | |
2251 | orphan_dir_inode, &target_de); | |
2252 | if (!target_de_bh) { | |
2253 | status = -ENOENT; | |
2254 | mlog_errno(status); | |
2255 | goto leave; | |
2256 | } | |
2257 | ||
2258 | /* remove it from the orphan directory */ | |
2259 | status = ocfs2_delete_entry(handle, orphan_dir_inode, target_de, | |
2260 | target_de_bh); | |
2261 | if (status < 0) { | |
2262 | mlog_errno(status); | |
2263 | goto leave; | |
2264 | } | |
2265 | ||
2266 | status = ocfs2_journal_access(handle,orphan_dir_inode, orphan_dir_bh, | |
2267 | OCFS2_JOURNAL_ACCESS_WRITE); | |
2268 | if (status < 0) { | |
2269 | mlog_errno(status); | |
2270 | goto leave; | |
2271 | } | |
2272 | ||
2273 | /* do the i_nlink dance! :) */ | |
2274 | orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; | |
2275 | if (S_ISDIR(inode->i_mode)) | |
2276 | le16_add_cpu(&orphan_fe->i_links_count, -1); | |
2277 | orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count); | |
2278 | ||
2279 | status = ocfs2_journal_dirty(handle, orphan_dir_bh); | |
2280 | if (status < 0) { | |
2281 | mlog_errno(status); | |
2282 | goto leave; | |
2283 | } | |
2284 | ||
2285 | leave: | |
2286 | if (target_de_bh) | |
2287 | brelse(target_de_bh); | |
2288 | ||
2289 | mlog_exit(status); | |
2290 | return status; | |
2291 | } | |
2292 | ||
2293 | struct inode_operations ocfs2_dir_iops = { | |
2294 | .create = ocfs2_create, | |
2295 | .lookup = ocfs2_lookup, | |
2296 | .link = ocfs2_link, | |
2297 | .unlink = ocfs2_unlink, | |
2298 | .rmdir = ocfs2_unlink, | |
2299 | .symlink = ocfs2_symlink, | |
2300 | .mkdir = ocfs2_mkdir, | |
2301 | .mknod = ocfs2_mknod, | |
2302 | .rename = ocfs2_rename, | |
2303 | .setattr = ocfs2_setattr, | |
2304 | .getattr = ocfs2_getattr, | |
2305 | }; |