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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 | ||
1fabe148 | 78 | static int ocfs2_delete_entry(handle_t *handle, |
ccd979bd MF |
79 | struct inode *dir, |
80 | struct ocfs2_dir_entry *de_del, | |
81 | struct buffer_head *bh); | |
82 | ||
1fabe148 | 83 | static int __ocfs2_add_entry(handle_t *handle, |
ccd979bd MF |
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, | |
1fabe148 | 96 | handle_t *handle, |
ccd979bd MF |
97 | struct inode **ret_inode, |
98 | struct ocfs2_alloc_context *inode_ac); | |
99 | ||
100 | static int ocfs2_fill_new_dir(struct ocfs2_super *osb, | |
1fabe148 | 101 | handle_t *handle, |
ccd979bd MF |
102 | struct inode *parent, |
103 | struct inode *inode, | |
104 | struct buffer_head *fe_bh, | |
105 | struct ocfs2_alloc_context *data_ac); | |
106 | ||
ccd979bd | 107 | static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, |
5098c27b | 108 | struct inode **ret_orphan_dir, |
ccd979bd MF |
109 | struct inode *inode, |
110 | char *name, | |
111 | struct buffer_head **de_bh); | |
112 | ||
113 | static int ocfs2_orphan_add(struct ocfs2_super *osb, | |
1fabe148 | 114 | handle_t *handle, |
ccd979bd MF |
115 | struct inode *inode, |
116 | struct ocfs2_dinode *fe, | |
117 | char *name, | |
5098c27b MF |
118 | struct buffer_head *de_bh, |
119 | struct inode *orphan_dir_inode); | |
ccd979bd MF |
120 | |
121 | static int ocfs2_create_symlink_data(struct ocfs2_super *osb, | |
1fabe148 | 122 | handle_t *handle, |
ccd979bd MF |
123 | struct inode *inode, |
124 | const char *symname); | |
125 | ||
1fabe148 | 126 | static inline int ocfs2_add_entry(handle_t *handle, |
ccd979bd MF |
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 | ||
b0697053 MF |
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); | |
ccd979bd | 161 | |
4bcec184 | 162 | status = ocfs2_meta_lock(dir, NULL, 0); |
ccd979bd MF |
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 | ||
24c19ef4 | 176 | inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0); |
ccd979bd | 177 | if (IS_ERR(inode)) { |
b0697053 MF |
178 | mlog(ML_ERROR, "Unable to create inode %llu\n", |
179 | (unsigned long long)blkno); | |
ccd979bd MF |
180 | ret = ERR_PTR(-EACCES); |
181 | goto bail_unlock; | |
182 | } | |
183 | ||
184 | oi = OCFS2_I(inode); | |
185 | /* Clear any orphaned state... If we were able to look up the | |
186 | * inode from a directory, it certainly can't be orphaned. We | |
187 | * might have the bad state from a node which intended to | |
188 | * orphan this inode but crashed before it could commit the | |
189 | * unlink. */ | |
190 | spin_lock(&oi->ip_lock); | |
191 | oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED; | |
192 | oi->ip_orphaned_slot = OCFS2_INVALID_SLOT; | |
193 | spin_unlock(&oi->ip_lock); | |
194 | ||
195 | bail_add: | |
ccd979bd MF |
196 | dentry->d_op = &ocfs2_dentry_ops; |
197 | ret = d_splice_alias(inode, dentry); | |
198 | ||
379dfe9d MF |
199 | if (inode) { |
200 | /* | |
201 | * If d_splice_alias() finds a DCACHE_DISCONNECTED | |
202 | * dentry, it will d_move() it on top of ourse. The | |
203 | * return value will indicate this however, so in | |
204 | * those cases, we switch them around for the locking | |
205 | * code. | |
206 | * | |
207 | * NOTE: This dentry already has ->d_op set from | |
208 | * ocfs2_get_parent() and ocfs2_get_dentry() | |
209 | */ | |
210 | if (ret) | |
211 | dentry = ret; | |
212 | ||
213 | status = ocfs2_dentry_attach_lock(dentry, inode, | |
0027dd5b | 214 | OCFS2_I(dir)->ip_blkno); |
379dfe9d MF |
215 | if (status) { |
216 | mlog_errno(status); | |
217 | ret = ERR_PTR(status); | |
218 | goto bail_unlock; | |
219 | } | |
220 | } | |
221 | ||
ccd979bd MF |
222 | bail_unlock: |
223 | /* Don't drop the cluster lock until *after* the d_add -- | |
224 | * unlink on another node will message us to remove that | |
225 | * dentry under this lock so otherwise we can race this with | |
226 | * the vote thread and have a stale dentry. */ | |
227 | ocfs2_meta_unlock(dir, 0); | |
228 | ||
229 | bail: | |
230 | if (dirent_bh) | |
231 | brelse(dirent_bh); | |
232 | ||
233 | mlog_exit_ptr(ret); | |
234 | ||
235 | return ret; | |
236 | } | |
237 | ||
238 | static int ocfs2_fill_new_dir(struct ocfs2_super *osb, | |
1fabe148 | 239 | handle_t *handle, |
ccd979bd MF |
240 | struct inode *parent, |
241 | struct inode *inode, | |
242 | struct buffer_head *fe_bh, | |
243 | struct ocfs2_alloc_context *data_ac) | |
244 | { | |
245 | int status; | |
246 | struct buffer_head *new_bh = NULL; | |
247 | struct ocfs2_dir_entry *de = NULL; | |
248 | ||
249 | mlog_entry_void(); | |
250 | ||
251 | status = ocfs2_do_extend_dir(osb->sb, handle, inode, fe_bh, | |
252 | data_ac, NULL, &new_bh); | |
253 | if (status < 0) { | |
254 | mlog_errno(status); | |
255 | goto bail; | |
256 | } | |
257 | ||
258 | ocfs2_set_new_buffer_uptodate(inode, new_bh); | |
259 | ||
260 | status = ocfs2_journal_access(handle, inode, new_bh, | |
261 | OCFS2_JOURNAL_ACCESS_CREATE); | |
262 | if (status < 0) { | |
263 | mlog_errno(status); | |
264 | goto bail; | |
265 | } | |
266 | memset(new_bh->b_data, 0, osb->sb->s_blocksize); | |
267 | ||
268 | de = (struct ocfs2_dir_entry *) new_bh->b_data; | |
269 | de->inode = cpu_to_le64(OCFS2_I(inode)->ip_blkno); | |
270 | de->name_len = 1; | |
271 | de->rec_len = | |
272 | cpu_to_le16(OCFS2_DIR_REC_LEN(de->name_len)); | |
273 | strcpy(de->name, "."); | |
274 | ocfs2_set_de_type(de, S_IFDIR); | |
275 | de = (struct ocfs2_dir_entry *) ((char *)de + le16_to_cpu(de->rec_len)); | |
276 | de->inode = cpu_to_le64(OCFS2_I(parent)->ip_blkno); | |
277 | de->rec_len = cpu_to_le16(inode->i_sb->s_blocksize - | |
278 | OCFS2_DIR_REC_LEN(1)); | |
279 | de->name_len = 2; | |
280 | strcpy(de->name, ".."); | |
281 | ocfs2_set_de_type(de, S_IFDIR); | |
282 | ||
283 | status = ocfs2_journal_dirty(handle, new_bh); | |
284 | if (status < 0) { | |
285 | mlog_errno(status); | |
286 | goto bail; | |
287 | } | |
288 | ||
289 | i_size_write(inode, inode->i_sb->s_blocksize); | |
290 | inode->i_nlink = 2; | |
291 | inode->i_blocks = ocfs2_align_bytes_to_sectors(inode->i_sb->s_blocksize); | |
292 | status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); | |
293 | if (status < 0) { | |
294 | mlog_errno(status); | |
295 | goto bail; | |
296 | } | |
297 | ||
298 | status = 0; | |
299 | bail: | |
300 | if (new_bh) | |
301 | brelse(new_bh); | |
302 | ||
303 | mlog_exit(status); | |
304 | return status; | |
305 | } | |
306 | ||
307 | static int ocfs2_mknod(struct inode *dir, | |
308 | struct dentry *dentry, | |
309 | int mode, | |
310 | dev_t dev) | |
311 | { | |
312 | int status = 0; | |
313 | struct buffer_head *parent_fe_bh = NULL; | |
1fabe148 | 314 | handle_t *handle = NULL; |
ccd979bd MF |
315 | struct ocfs2_super *osb; |
316 | struct ocfs2_dinode *dirfe; | |
317 | struct buffer_head *new_fe_bh = NULL; | |
318 | struct buffer_head *de_bh = NULL; | |
319 | struct inode *inode = NULL; | |
320 | struct ocfs2_alloc_context *inode_ac = NULL; | |
321 | struct ocfs2_alloc_context *data_ac = NULL; | |
322 | ||
323 | mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode, | |
324 | (unsigned long)dev, dentry->d_name.len, | |
325 | dentry->d_name.name); | |
326 | ||
327 | /* get our super block */ | |
328 | osb = OCFS2_SB(dir->i_sb); | |
329 | ||
4bcec184 | 330 | status = ocfs2_meta_lock(dir, &parent_fe_bh, 1); |
e3a82138 MF |
331 | if (status < 0) { |
332 | if (status != -ENOENT) | |
333 | mlog_errno(status); | |
334 | return status; | |
335 | } | |
336 | ||
a663e305 MF |
337 | if (S_ISDIR(mode) && (dir->i_nlink >= OCFS2_LINK_MAX)) { |
338 | status = -EMLINK; | |
339 | goto leave; | |
340 | } | |
341 | ||
ccd979bd MF |
342 | dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; |
343 | if (!dirfe->i_links_count) { | |
344 | /* can't make a file in a deleted directory. */ | |
345 | status = -ENOENT; | |
346 | goto leave; | |
347 | } | |
348 | ||
349 | status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, | |
350 | dentry->d_name.len); | |
351 | if (status) | |
352 | goto leave; | |
353 | ||
354 | /* get a spot inside the dir. */ | |
355 | status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, | |
356 | dentry->d_name.name, | |
357 | dentry->d_name.len, &de_bh); | |
358 | if (status < 0) { | |
359 | mlog_errno(status); | |
360 | goto leave; | |
361 | } | |
362 | ||
363 | /* reserve an inode spot */ | |
da5cbf2f | 364 | status = ocfs2_reserve_new_inode(osb, &inode_ac); |
ccd979bd MF |
365 | if (status < 0) { |
366 | if (status != -ENOSPC) | |
367 | mlog_errno(status); | |
368 | goto leave; | |
369 | } | |
370 | ||
371 | /* are we making a directory? If so, reserve a cluster for his | |
372 | * 1st extent. */ | |
373 | if (S_ISDIR(mode)) { | |
da5cbf2f | 374 | status = ocfs2_reserve_clusters(osb, 1, &data_ac); |
ccd979bd MF |
375 | if (status < 0) { |
376 | if (status != -ENOSPC) | |
377 | mlog_errno(status); | |
378 | goto leave; | |
379 | } | |
380 | } | |
381 | ||
65eff9cc | 382 | handle = ocfs2_start_trans(osb, OCFS2_MKNOD_CREDITS); |
ccd979bd MF |
383 | if (IS_ERR(handle)) { |
384 | status = PTR_ERR(handle); | |
385 | handle = NULL; | |
386 | mlog_errno(status); | |
387 | goto leave; | |
388 | } | |
389 | ||
390 | /* do the real work now. */ | |
391 | status = ocfs2_mknod_locked(osb, dir, dentry, mode, dev, | |
392 | &new_fe_bh, parent_fe_bh, handle, | |
393 | &inode, inode_ac); | |
394 | if (status < 0) { | |
395 | mlog_errno(status); | |
396 | goto leave; | |
397 | } | |
398 | ||
399 | if (S_ISDIR(mode)) { | |
400 | status = ocfs2_fill_new_dir(osb, handle, dir, inode, | |
401 | new_fe_bh, data_ac); | |
402 | if (status < 0) { | |
403 | mlog_errno(status); | |
404 | goto leave; | |
405 | } | |
406 | ||
407 | status = ocfs2_journal_access(handle, dir, parent_fe_bh, | |
408 | OCFS2_JOURNAL_ACCESS_WRITE); | |
409 | if (status < 0) { | |
410 | mlog_errno(status); | |
411 | goto leave; | |
412 | } | |
413 | le16_add_cpu(&dirfe->i_links_count, 1); | |
414 | status = ocfs2_journal_dirty(handle, parent_fe_bh); | |
415 | if (status < 0) { | |
416 | mlog_errno(status); | |
417 | goto leave; | |
418 | } | |
d8c76e6f | 419 | inc_nlink(dir); |
ccd979bd MF |
420 | } |
421 | ||
422 | status = ocfs2_add_entry(handle, dentry, inode, | |
423 | OCFS2_I(inode)->ip_blkno, parent_fe_bh, | |
424 | de_bh); | |
425 | if (status < 0) { | |
426 | mlog_errno(status); | |
427 | goto leave; | |
428 | } | |
429 | ||
379dfe9d | 430 | status = ocfs2_dentry_attach_lock(dentry, inode, |
0027dd5b | 431 | OCFS2_I(dir)->ip_blkno); |
379dfe9d MF |
432 | if (status) { |
433 | mlog_errno(status); | |
434 | goto leave; | |
435 | } | |
436 | ||
ccd979bd MF |
437 | insert_inode_hash(inode); |
438 | dentry->d_op = &ocfs2_dentry_ops; | |
439 | d_instantiate(dentry, inode); | |
440 | status = 0; | |
441 | leave: | |
442 | if (handle) | |
02dc1af4 | 443 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 444 | |
e3a82138 MF |
445 | ocfs2_meta_unlock(dir, 1); |
446 | ||
ccd979bd MF |
447 | if (status == -ENOSPC) |
448 | mlog(0, "Disk is full\n"); | |
449 | ||
450 | if (new_fe_bh) | |
451 | brelse(new_fe_bh); | |
452 | ||
453 | if (de_bh) | |
454 | brelse(de_bh); | |
455 | ||
456 | if (parent_fe_bh) | |
457 | brelse(parent_fe_bh); | |
458 | ||
459 | if ((status < 0) && inode) | |
460 | iput(inode); | |
461 | ||
462 | if (inode_ac) | |
463 | ocfs2_free_alloc_context(inode_ac); | |
464 | ||
465 | if (data_ac) | |
466 | ocfs2_free_alloc_context(data_ac); | |
467 | ||
468 | mlog_exit(status); | |
469 | ||
470 | return status; | |
471 | } | |
472 | ||
473 | static int ocfs2_mknod_locked(struct ocfs2_super *osb, | |
474 | struct inode *dir, | |
475 | struct dentry *dentry, int mode, | |
476 | dev_t dev, | |
477 | struct buffer_head **new_fe_bh, | |
478 | struct buffer_head *parent_fe_bh, | |
1fabe148 | 479 | handle_t *handle, |
ccd979bd MF |
480 | struct inode **ret_inode, |
481 | struct ocfs2_alloc_context *inode_ac) | |
482 | { | |
483 | int status = 0; | |
484 | struct ocfs2_dinode *fe = NULL; | |
485 | struct ocfs2_extent_list *fel; | |
486 | u64 fe_blkno = 0; | |
487 | u16 suballoc_bit; | |
488 | struct inode *inode = NULL; | |
489 | ||
490 | mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode, | |
491 | (unsigned long)dev, dentry->d_name.len, | |
492 | dentry->d_name.name); | |
493 | ||
494 | *new_fe_bh = NULL; | |
495 | *ret_inode = NULL; | |
496 | ||
497 | status = ocfs2_claim_new_inode(osb, handle, inode_ac, &suballoc_bit, | |
498 | &fe_blkno); | |
499 | if (status < 0) { | |
500 | mlog_errno(status); | |
501 | goto leave; | |
502 | } | |
503 | ||
504 | inode = new_inode(dir->i_sb); | |
505 | if (IS_ERR(inode)) { | |
506 | status = PTR_ERR(inode); | |
507 | mlog(ML_ERROR, "new_inode failed!\n"); | |
508 | goto leave; | |
509 | } | |
510 | ||
511 | /* populate as many fields early on as possible - many of | |
512 | * these are used by the support functions here and in | |
513 | * callers. */ | |
514 | inode->i_ino = ino_from_blkno(osb->sb, fe_blkno); | |
515 | OCFS2_I(inode)->ip_blkno = fe_blkno; | |
516 | if (S_ISDIR(mode)) | |
517 | inode->i_nlink = 2; | |
518 | else | |
519 | inode->i_nlink = 1; | |
520 | inode->i_mode = mode; | |
521 | spin_lock(&osb->osb_lock); | |
522 | inode->i_generation = osb->s_next_generation++; | |
523 | spin_unlock(&osb->osb_lock); | |
524 | ||
525 | *new_fe_bh = sb_getblk(osb->sb, fe_blkno); | |
526 | if (!*new_fe_bh) { | |
527 | status = -EIO; | |
528 | mlog_errno(status); | |
529 | goto leave; | |
530 | } | |
531 | ocfs2_set_new_buffer_uptodate(inode, *new_fe_bh); | |
532 | ||
533 | status = ocfs2_journal_access(handle, inode, *new_fe_bh, | |
534 | OCFS2_JOURNAL_ACCESS_CREATE); | |
535 | if (status < 0) { | |
536 | mlog_errno(status); | |
537 | goto leave; | |
538 | } | |
539 | ||
540 | fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data; | |
541 | memset(fe, 0, osb->sb->s_blocksize); | |
542 | ||
543 | fe->i_generation = cpu_to_le32(inode->i_generation); | |
544 | fe->i_fs_generation = cpu_to_le32(osb->fs_generation); | |
545 | fe->i_blkno = cpu_to_le64(fe_blkno); | |
546 | fe->i_suballoc_bit = cpu_to_le16(suballoc_bit); | |
547 | fe->i_suballoc_slot = cpu_to_le16(osb->slot_num); | |
548 | fe->i_uid = cpu_to_le32(current->fsuid); | |
549 | if (dir->i_mode & S_ISGID) { | |
550 | fe->i_gid = cpu_to_le32(dir->i_gid); | |
551 | if (S_ISDIR(mode)) | |
552 | mode |= S_ISGID; | |
553 | } else | |
554 | fe->i_gid = cpu_to_le32(current->fsgid); | |
555 | fe->i_mode = cpu_to_le16(mode); | |
556 | if (S_ISCHR(mode) || S_ISBLK(mode)) | |
557 | fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev)); | |
558 | ||
559 | fe->i_links_count = cpu_to_le16(inode->i_nlink); | |
560 | ||
561 | fe->i_last_eb_blk = 0; | |
562 | strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE); | |
563 | le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL); | |
564 | fe->i_atime = fe->i_ctime = fe->i_mtime = | |
565 | cpu_to_le64(CURRENT_TIME.tv_sec); | |
566 | fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = | |
567 | cpu_to_le32(CURRENT_TIME.tv_nsec); | |
568 | fe->i_dtime = 0; | |
569 | ||
570 | fel = &fe->id2.i_list; | |
571 | fel->l_tree_depth = 0; | |
572 | fel->l_next_free_rec = 0; | |
573 | fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb)); | |
574 | ||
575 | status = ocfs2_journal_dirty(handle, *new_fe_bh); | |
576 | if (status < 0) { | |
577 | mlog_errno(status); | |
578 | goto leave; | |
579 | } | |
580 | ||
581 | if (ocfs2_populate_inode(inode, fe, 1) < 0) { | |
582 | mlog(ML_ERROR, "populate inode failed! bh->b_blocknr=%llu, " | |
b0697053 | 583 | "i_blkno=%llu, i_ino=%lu\n", |
ccd979bd | 584 | (unsigned long long) (*new_fe_bh)->b_blocknr, |
b0697053 | 585 | (unsigned long long)fe->i_blkno, inode->i_ino); |
ccd979bd MF |
586 | BUG(); |
587 | } | |
588 | ||
589 | ocfs2_inode_set_new(osb, inode); | |
c271c5c2 SM |
590 | if (!ocfs2_mount_local(osb)) { |
591 | status = ocfs2_create_new_inode_locks(inode); | |
592 | if (status < 0) | |
593 | mlog_errno(status); | |
594 | } | |
ccd979bd MF |
595 | |
596 | status = 0; /* error in ocfs2_create_new_inode_locks is not | |
597 | * critical */ | |
598 | ||
599 | *ret_inode = inode; | |
600 | leave: | |
601 | if (status < 0) { | |
602 | if (*new_fe_bh) { | |
603 | brelse(*new_fe_bh); | |
604 | *new_fe_bh = NULL; | |
605 | } | |
606 | if (inode) | |
607 | iput(inode); | |
608 | } | |
609 | ||
610 | mlog_exit(status); | |
611 | return status; | |
612 | } | |
613 | ||
614 | static int ocfs2_mkdir(struct inode *dir, | |
615 | struct dentry *dentry, | |
616 | int mode) | |
617 | { | |
618 | int ret; | |
619 | ||
620 | mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode, | |
621 | dentry->d_name.len, dentry->d_name.name); | |
622 | ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0); | |
623 | mlog_exit(ret); | |
624 | ||
625 | return ret; | |
626 | } | |
627 | ||
628 | static int ocfs2_create(struct inode *dir, | |
629 | struct dentry *dentry, | |
630 | int mode, | |
631 | struct nameidata *nd) | |
632 | { | |
633 | int ret; | |
634 | ||
635 | mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode, | |
636 | dentry->d_name.len, dentry->d_name.name); | |
637 | ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0); | |
638 | mlog_exit(ret); | |
639 | ||
640 | return ret; | |
641 | } | |
642 | ||
643 | static int ocfs2_link(struct dentry *old_dentry, | |
644 | struct inode *dir, | |
645 | struct dentry *dentry) | |
646 | { | |
1fabe148 | 647 | handle_t *handle; |
ccd979bd MF |
648 | struct inode *inode = old_dentry->d_inode; |
649 | int err; | |
650 | struct buffer_head *fe_bh = NULL; | |
651 | struct buffer_head *parent_fe_bh = NULL; | |
652 | struct buffer_head *de_bh = NULL; | |
653 | struct ocfs2_dinode *fe = NULL; | |
654 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
655 | ||
656 | mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino, | |
657 | old_dentry->d_name.len, old_dentry->d_name.name, | |
658 | dentry->d_name.len, dentry->d_name.name); | |
659 | ||
123a9643 MF |
660 | if (S_ISDIR(inode->i_mode)) |
661 | return -EPERM; | |
ccd979bd | 662 | |
4bcec184 | 663 | err = ocfs2_meta_lock(dir, &parent_fe_bh, 1); |
ccd979bd MF |
664 | if (err < 0) { |
665 | if (err != -ENOENT) | |
666 | mlog_errno(err); | |
123a9643 | 667 | return err; |
ccd979bd MF |
668 | } |
669 | ||
0f62de2c TY |
670 | if (!dir->i_nlink) { |
671 | err = -ENOENT; | |
123a9643 | 672 | goto out; |
0f62de2c TY |
673 | } |
674 | ||
ccd979bd MF |
675 | err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, |
676 | dentry->d_name.len); | |
677 | if (err) | |
123a9643 | 678 | goto out; |
ccd979bd MF |
679 | |
680 | err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, | |
681 | dentry->d_name.name, | |
682 | dentry->d_name.len, &de_bh); | |
683 | if (err < 0) { | |
684 | mlog_errno(err); | |
123a9643 | 685 | goto out; |
ccd979bd MF |
686 | } |
687 | ||
4bcec184 | 688 | err = ocfs2_meta_lock(inode, &fe_bh, 1); |
ccd979bd MF |
689 | if (err < 0) { |
690 | if (err != -ENOENT) | |
691 | mlog_errno(err); | |
123a9643 | 692 | goto out; |
ccd979bd MF |
693 | } |
694 | ||
695 | fe = (struct ocfs2_dinode *) fe_bh->b_data; | |
696 | if (le16_to_cpu(fe->i_links_count) >= OCFS2_LINK_MAX) { | |
697 | err = -EMLINK; | |
123a9643 | 698 | goto out_unlock_inode; |
ccd979bd MF |
699 | } |
700 | ||
65eff9cc | 701 | handle = ocfs2_start_trans(osb, OCFS2_LINK_CREDITS); |
ccd979bd MF |
702 | if (IS_ERR(handle)) { |
703 | err = PTR_ERR(handle); | |
704 | handle = NULL; | |
705 | mlog_errno(err); | |
123a9643 | 706 | goto out_unlock_inode; |
ccd979bd MF |
707 | } |
708 | ||
709 | err = ocfs2_journal_access(handle, inode, fe_bh, | |
710 | OCFS2_JOURNAL_ACCESS_WRITE); | |
711 | if (err < 0) { | |
712 | mlog_errno(err); | |
123a9643 | 713 | goto out_commit; |
ccd979bd MF |
714 | } |
715 | ||
d8c76e6f | 716 | inc_nlink(inode); |
ccd979bd MF |
717 | inode->i_ctime = CURRENT_TIME; |
718 | fe->i_links_count = cpu_to_le16(inode->i_nlink); | |
719 | fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
720 | fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
721 | ||
722 | err = ocfs2_journal_dirty(handle, fe_bh); | |
723 | if (err < 0) { | |
724 | le16_add_cpu(&fe->i_links_count, -1); | |
9a53c3a7 | 725 | drop_nlink(inode); |
ccd979bd | 726 | mlog_errno(err); |
123a9643 | 727 | goto out_commit; |
ccd979bd MF |
728 | } |
729 | ||
730 | err = ocfs2_add_entry(handle, dentry, inode, | |
731 | OCFS2_I(inode)->ip_blkno, | |
732 | parent_fe_bh, de_bh); | |
733 | if (err) { | |
734 | le16_add_cpu(&fe->i_links_count, -1); | |
9a53c3a7 | 735 | drop_nlink(inode); |
ccd979bd | 736 | mlog_errno(err); |
123a9643 | 737 | goto out_commit; |
ccd979bd MF |
738 | } |
739 | ||
0027dd5b | 740 | err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); |
379dfe9d MF |
741 | if (err) { |
742 | mlog_errno(err); | |
123a9643 | 743 | goto out_commit; |
379dfe9d MF |
744 | } |
745 | ||
ccd979bd MF |
746 | atomic_inc(&inode->i_count); |
747 | dentry->d_op = &ocfs2_dentry_ops; | |
748 | d_instantiate(dentry, inode); | |
123a9643 MF |
749 | |
750 | out_commit: | |
02dc1af4 | 751 | ocfs2_commit_trans(osb, handle); |
123a9643 MF |
752 | out_unlock_inode: |
753 | ocfs2_meta_unlock(inode, 1); | |
754 | ||
755 | out: | |
756 | ocfs2_meta_unlock(dir, 1); | |
757 | ||
ccd979bd MF |
758 | if (de_bh) |
759 | brelse(de_bh); | |
760 | if (fe_bh) | |
761 | brelse(fe_bh); | |
762 | if (parent_fe_bh) | |
763 | brelse(parent_fe_bh); | |
764 | ||
765 | mlog_exit(err); | |
766 | ||
767 | return err; | |
768 | } | |
769 | ||
379dfe9d MF |
770 | /* |
771 | * Takes and drops an exclusive lock on the given dentry. This will | |
772 | * force other nodes to drop it. | |
773 | */ | |
774 | static int ocfs2_remote_dentry_delete(struct dentry *dentry) | |
775 | { | |
776 | int ret; | |
777 | ||
778 | ret = ocfs2_dentry_lock(dentry, 1); | |
779 | if (ret) | |
780 | mlog_errno(ret); | |
781 | else | |
782 | ocfs2_dentry_unlock(dentry, 1); | |
783 | ||
784 | return ret; | |
785 | } | |
786 | ||
17ff7856 MF |
787 | static inline int inode_is_unlinkable(struct inode *inode) |
788 | { | |
789 | if (S_ISDIR(inode->i_mode)) { | |
790 | if (inode->i_nlink == 2) | |
791 | return 1; | |
792 | return 0; | |
793 | } | |
794 | ||
795 | if (inode->i_nlink == 1) | |
796 | return 1; | |
797 | return 0; | |
798 | } | |
799 | ||
ccd979bd MF |
800 | static int ocfs2_unlink(struct inode *dir, |
801 | struct dentry *dentry) | |
802 | { | |
803 | int status; | |
30a4f5e8 | 804 | int child_locked = 0; |
ccd979bd | 805 | struct inode *inode = dentry->d_inode; |
5098c27b | 806 | struct inode *orphan_dir = NULL; |
ccd979bd MF |
807 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); |
808 | u64 blkno; | |
809 | struct ocfs2_dinode *fe = NULL; | |
810 | struct buffer_head *fe_bh = NULL; | |
811 | struct buffer_head *parent_node_bh = NULL; | |
1fabe148 | 812 | handle_t *handle = NULL; |
ccd979bd MF |
813 | struct ocfs2_dir_entry *dirent = NULL; |
814 | struct buffer_head *dirent_bh = NULL; | |
815 | char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; | |
816 | struct buffer_head *orphan_entry_bh = NULL; | |
817 | ||
818 | mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry, | |
819 | dentry->d_name.len, dentry->d_name.name); | |
820 | ||
821 | BUG_ON(dentry->d_parent->d_inode != dir); | |
822 | ||
b0697053 | 823 | mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno); |
ccd979bd MF |
824 | |
825 | if (inode == osb->root_inode) { | |
826 | mlog(0, "Cannot delete the root directory\n"); | |
30a4f5e8 | 827 | return -EPERM; |
ccd979bd MF |
828 | } |
829 | ||
4bcec184 | 830 | status = ocfs2_meta_lock(dir, &parent_node_bh, 1); |
ccd979bd MF |
831 | if (status < 0) { |
832 | if (status != -ENOENT) | |
833 | mlog_errno(status); | |
30a4f5e8 | 834 | return status; |
ccd979bd MF |
835 | } |
836 | ||
837 | status = ocfs2_find_files_on_disk(dentry->d_name.name, | |
838 | dentry->d_name.len, &blkno, | |
839 | dir, &dirent_bh, &dirent); | |
840 | if (status < 0) { | |
841 | if (status != -ENOENT) | |
842 | mlog_errno(status); | |
843 | goto leave; | |
844 | } | |
845 | ||
846 | if (OCFS2_I(inode)->ip_blkno != blkno) { | |
847 | status = -ENOENT; | |
848 | ||
b0697053 MF |
849 | mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n", |
850 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
851 | (unsigned long long)blkno, OCFS2_I(inode)->ip_flags); | |
ccd979bd MF |
852 | goto leave; |
853 | } | |
854 | ||
4bcec184 | 855 | status = ocfs2_meta_lock(inode, &fe_bh, 1); |
ccd979bd MF |
856 | if (status < 0) { |
857 | if (status != -ENOENT) | |
858 | mlog_errno(status); | |
859 | goto leave; | |
860 | } | |
30a4f5e8 | 861 | child_locked = 1; |
ccd979bd MF |
862 | |
863 | if (S_ISDIR(inode->i_mode)) { | |
864 | if (!ocfs2_empty_dir(inode)) { | |
865 | status = -ENOTEMPTY; | |
866 | goto leave; | |
867 | } else if (inode->i_nlink != 2) { | |
868 | status = -ENOTEMPTY; | |
869 | goto leave; | |
870 | } | |
871 | } | |
872 | ||
379dfe9d | 873 | status = ocfs2_remote_dentry_delete(dentry); |
ccd979bd MF |
874 | if (status < 0) { |
875 | /* This vote should succeed under all normal | |
876 | * circumstances. */ | |
877 | mlog_errno(status); | |
878 | goto leave; | |
879 | } | |
880 | ||
17ff7856 | 881 | if (inode_is_unlinkable(inode)) { |
5098c27b | 882 | status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, inode, |
ccd979bd MF |
883 | orphan_name, |
884 | &orphan_entry_bh); | |
885 | if (status < 0) { | |
886 | mlog_errno(status); | |
887 | goto leave; | |
888 | } | |
889 | } | |
890 | ||
65eff9cc | 891 | handle = ocfs2_start_trans(osb, OCFS2_UNLINK_CREDITS); |
ccd979bd MF |
892 | if (IS_ERR(handle)) { |
893 | status = PTR_ERR(handle); | |
894 | handle = NULL; | |
895 | mlog_errno(status); | |
896 | goto leave; | |
897 | } | |
898 | ||
899 | status = ocfs2_journal_access(handle, inode, fe_bh, | |
900 | OCFS2_JOURNAL_ACCESS_WRITE); | |
901 | if (status < 0) { | |
902 | mlog_errno(status); | |
903 | goto leave; | |
904 | } | |
905 | ||
906 | fe = (struct ocfs2_dinode *) fe_bh->b_data; | |
907 | ||
17ff7856 | 908 | if (inode_is_unlinkable(inode)) { |
ccd979bd | 909 | status = ocfs2_orphan_add(osb, handle, inode, fe, orphan_name, |
5098c27b | 910 | orphan_entry_bh, orphan_dir); |
ccd979bd MF |
911 | if (status < 0) { |
912 | mlog_errno(status); | |
913 | goto leave; | |
914 | } | |
915 | } | |
916 | ||
917 | /* delete the name from the parent dir */ | |
918 | status = ocfs2_delete_entry(handle, dir, dirent, dirent_bh); | |
919 | if (status < 0) { | |
920 | mlog_errno(status); | |
921 | goto leave; | |
922 | } | |
923 | ||
17ff7856 MF |
924 | if (S_ISDIR(inode->i_mode)) |
925 | drop_nlink(inode); | |
926 | drop_nlink(inode); | |
ccd979bd | 927 | fe->i_links_count = cpu_to_le16(inode->i_nlink); |
ccd979bd MF |
928 | |
929 | status = ocfs2_journal_dirty(handle, fe_bh); | |
930 | if (status < 0) { | |
931 | mlog_errno(status); | |
932 | goto leave; | |
933 | } | |
934 | ||
592282cf MF |
935 | dir->i_ctime = dir->i_mtime = CURRENT_TIME; |
936 | if (S_ISDIR(inode->i_mode)) | |
17ff7856 | 937 | drop_nlink(dir); |
592282cf MF |
938 | |
939 | status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh); | |
940 | if (status < 0) { | |
941 | mlog_errno(status); | |
942 | if (S_ISDIR(inode->i_mode)) | |
d8c76e6f | 943 | inc_nlink(dir); |
ccd979bd MF |
944 | } |
945 | ||
946 | leave: | |
ccd979bd | 947 | if (handle) |
02dc1af4 | 948 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 949 | |
30a4f5e8 MF |
950 | if (child_locked) |
951 | ocfs2_meta_unlock(inode, 1); | |
952 | ||
953 | ocfs2_meta_unlock(dir, 1); | |
954 | ||
5098c27b MF |
955 | if (orphan_dir) { |
956 | /* This was locked for us in ocfs2_prepare_orphan_dir() */ | |
957 | ocfs2_meta_unlock(orphan_dir, 1); | |
958 | mutex_unlock(&orphan_dir->i_mutex); | |
959 | iput(orphan_dir); | |
960 | } | |
961 | ||
ccd979bd MF |
962 | if (fe_bh) |
963 | brelse(fe_bh); | |
964 | ||
965 | if (dirent_bh) | |
966 | brelse(dirent_bh); | |
967 | ||
968 | if (parent_node_bh) | |
969 | brelse(parent_node_bh); | |
970 | ||
971 | if (orphan_entry_bh) | |
972 | brelse(orphan_entry_bh); | |
973 | ||
974 | mlog_exit(status); | |
975 | ||
976 | return status; | |
977 | } | |
978 | ||
979 | /* | |
980 | * The only place this should be used is rename! | |
981 | * if they have the same id, then the 1st one is the only one locked. | |
982 | */ | |
983 | static int ocfs2_double_lock(struct ocfs2_super *osb, | |
ccd979bd MF |
984 | struct buffer_head **bh1, |
985 | struct inode *inode1, | |
986 | struct buffer_head **bh2, | |
987 | struct inode *inode2) | |
988 | { | |
989 | int status; | |
990 | struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); | |
991 | struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); | |
992 | struct buffer_head **tmpbh; | |
993 | struct inode *tmpinode; | |
994 | ||
b0697053 MF |
995 | mlog_entry("(inode1 = %llu, inode2 = %llu)\n", |
996 | (unsigned long long)oi1->ip_blkno, | |
997 | (unsigned long long)oi2->ip_blkno); | |
ccd979bd | 998 | |
ccd979bd MF |
999 | if (*bh1) |
1000 | *bh1 = NULL; | |
1001 | if (*bh2) | |
1002 | *bh2 = NULL; | |
1003 | ||
1004 | /* we always want to lock the one with the lower lockid first. */ | |
1005 | if (oi1->ip_blkno != oi2->ip_blkno) { | |
1006 | if (oi1->ip_blkno < oi2->ip_blkno) { | |
1007 | /* switch id1 and id2 around */ | |
1008 | mlog(0, "switching them around...\n"); | |
1009 | tmpbh = bh2; | |
1010 | bh2 = bh1; | |
1011 | bh1 = tmpbh; | |
1012 | ||
1013 | tmpinode = inode2; | |
1014 | inode2 = inode1; | |
1015 | inode1 = tmpinode; | |
1016 | } | |
1017 | /* lock id2 */ | |
4bcec184 | 1018 | status = ocfs2_meta_lock(inode2, bh2, 1); |
ccd979bd MF |
1019 | if (status < 0) { |
1020 | if (status != -ENOENT) | |
1021 | mlog_errno(status); | |
1022 | goto bail; | |
1023 | } | |
1024 | } | |
8d5596c6 | 1025 | |
ccd979bd | 1026 | /* lock id1 */ |
4bcec184 | 1027 | status = ocfs2_meta_lock(inode1, bh1, 1); |
ccd979bd | 1028 | if (status < 0) { |
8d5596c6 MF |
1029 | /* |
1030 | * An error return must mean that no cluster locks | |
1031 | * were held on function exit. | |
1032 | */ | |
1033 | if (oi1->ip_blkno != oi2->ip_blkno) | |
1034 | ocfs2_meta_unlock(inode2, 1); | |
1035 | ||
ccd979bd MF |
1036 | if (status != -ENOENT) |
1037 | mlog_errno(status); | |
ccd979bd | 1038 | } |
8d5596c6 | 1039 | |
ccd979bd MF |
1040 | bail: |
1041 | mlog_exit(status); | |
1042 | return status; | |
1043 | } | |
1044 | ||
8d5596c6 MF |
1045 | static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2) |
1046 | { | |
1047 | ocfs2_meta_unlock(inode1, 1); | |
1048 | ||
1049 | if (inode1 != inode2) | |
1050 | ocfs2_meta_unlock(inode2, 1); | |
1051 | } | |
1052 | ||
ccd979bd MF |
1053 | #define PARENT_INO(buffer) \ |
1054 | ((struct ocfs2_dir_entry *) \ | |
1055 | ((char *)buffer + \ | |
1056 | le16_to_cpu(((struct ocfs2_dir_entry *)buffer)->rec_len)))->inode | |
1057 | ||
1058 | static int ocfs2_rename(struct inode *old_dir, | |
1059 | struct dentry *old_dentry, | |
1060 | struct inode *new_dir, | |
1061 | struct dentry *new_dentry) | |
1062 | { | |
8d5596c6 MF |
1063 | int status = 0, rename_lock = 0, parents_locked = 0; |
1064 | int old_child_locked = 0, new_child_locked = 0; | |
ccd979bd MF |
1065 | struct inode *old_inode = old_dentry->d_inode; |
1066 | struct inode *new_inode = new_dentry->d_inode; | |
5098c27b | 1067 | struct inode *orphan_dir = NULL; |
ccd979bd MF |
1068 | struct ocfs2_dinode *newfe = NULL; |
1069 | char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; | |
1070 | struct buffer_head *orphan_entry_bh = NULL; | |
1071 | struct buffer_head *newfe_bh = NULL; | |
592282cf | 1072 | struct buffer_head *old_inode_bh = NULL; |
ccd979bd MF |
1073 | struct buffer_head *insert_entry_bh = NULL; |
1074 | struct ocfs2_super *osb = NULL; | |
1075 | u64 newfe_blkno; | |
1fabe148 | 1076 | handle_t *handle = NULL; |
ccd979bd MF |
1077 | struct buffer_head *old_dir_bh = NULL; |
1078 | struct buffer_head *new_dir_bh = NULL; | |
1079 | struct ocfs2_dir_entry *old_de = NULL, *new_de = NULL; // dirent for old_dentry | |
1080 | // and new_dentry | |
1081 | struct buffer_head *new_de_bh = NULL, *old_de_bh = NULL; // bhs for above | |
1082 | struct buffer_head *old_inode_de_bh = NULL; // if old_dentry is a dir, | |
1083 | // this is the 1st dirent bh | |
592282cf | 1084 | nlink_t old_dir_nlink = old_dir->i_nlink; |
ccd979bd MF |
1085 | |
1086 | /* At some point it might be nice to break this function up a | |
1087 | * bit. */ | |
1088 | ||
1089 | mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n", | |
1090 | old_dir, old_dentry, new_dir, new_dentry, | |
1091 | old_dentry->d_name.len, old_dentry->d_name.name, | |
1092 | new_dentry->d_name.len, new_dentry->d_name.name); | |
1093 | ||
1094 | osb = OCFS2_SB(old_dir->i_sb); | |
1095 | ||
1096 | if (new_inode) { | |
1097 | if (!igrab(new_inode)) | |
1098 | BUG(); | |
1099 | } | |
1100 | ||
ccd979bd MF |
1101 | /* Assume a directory heirarchy thusly: |
1102 | * a/b/c | |
1103 | * a/d | |
1104 | * a,b,c, and d are all directories. | |
1105 | * | |
1106 | * from cwd of 'a' on both nodes: | |
1107 | * node1: mv b/c d | |
1108 | * node2: mv d b/c | |
1109 | * | |
1110 | * And that's why, just like the VFS, we need a file system | |
1111 | * rename lock. */ | |
1112 | if (old_dentry != new_dentry) { | |
1113 | status = ocfs2_rename_lock(osb); | |
1114 | if (status < 0) { | |
1115 | mlog_errno(status); | |
1116 | goto bail; | |
1117 | } | |
1118 | rename_lock = 1; | |
1119 | } | |
1120 | ||
ccd979bd | 1121 | /* if old and new are the same, this'll just do one lock. */ |
8d5596c6 MF |
1122 | status = ocfs2_double_lock(osb, &old_dir_bh, old_dir, |
1123 | &new_dir_bh, new_dir); | |
ccd979bd MF |
1124 | if (status < 0) { |
1125 | mlog_errno(status); | |
1126 | goto bail; | |
1127 | } | |
8d5596c6 | 1128 | parents_locked = 1; |
ccd979bd MF |
1129 | |
1130 | /* make sure both dirs have bhs | |
1131 | * get an extra ref on old_dir_bh if old==new */ | |
1132 | if (!new_dir_bh) { | |
1133 | if (old_dir_bh) { | |
1134 | new_dir_bh = old_dir_bh; | |
1135 | get_bh(new_dir_bh); | |
1136 | } else { | |
1137 | mlog(ML_ERROR, "no old_dir_bh!\n"); | |
1138 | status = -EIO; | |
1139 | goto bail; | |
1140 | } | |
1141 | } | |
1142 | ||
379dfe9d | 1143 | /* |
592282cf MF |
1144 | * Aside from allowing a meta data update, the locking here |
1145 | * also ensures that the vote thread on other nodes won't have | |
1146 | * to concurrently downconvert the inode and the dentry locks. | |
379dfe9d | 1147 | */ |
592282cf | 1148 | status = ocfs2_meta_lock(old_inode, &old_inode_bh, 1); |
379dfe9d MF |
1149 | if (status < 0) { |
1150 | if (status != -ENOENT) | |
ccd979bd | 1151 | mlog_errno(status); |
379dfe9d MF |
1152 | goto bail; |
1153 | } | |
8d5596c6 | 1154 | old_child_locked = 1; |
ccd979bd | 1155 | |
379dfe9d MF |
1156 | status = ocfs2_remote_dentry_delete(old_dentry); |
1157 | if (status < 0) { | |
1158 | mlog_errno(status); | |
1159 | goto bail; | |
1160 | } | |
1161 | ||
1162 | if (S_ISDIR(old_inode->i_mode)) { | |
ccd979bd MF |
1163 | status = -EIO; |
1164 | old_inode_de_bh = ocfs2_bread(old_inode, 0, &status, 0); | |
1165 | if (!old_inode_de_bh) | |
1166 | goto bail; | |
1167 | ||
1168 | status = -EIO; | |
1169 | if (le64_to_cpu(PARENT_INO(old_inode_de_bh->b_data)) != | |
1170 | OCFS2_I(old_dir)->ip_blkno) | |
1171 | goto bail; | |
1172 | status = -EMLINK; | |
1173 | if (!new_inode && new_dir!=old_dir && | |
1174 | new_dir->i_nlink >= OCFS2_LINK_MAX) | |
1175 | goto bail; | |
ccd979bd MF |
1176 | } |
1177 | ||
1178 | status = -ENOENT; | |
1179 | old_de_bh = ocfs2_find_entry(old_dentry->d_name.name, | |
1180 | old_dentry->d_name.len, | |
1181 | old_dir, &old_de); | |
1182 | if (!old_de_bh) | |
1183 | goto bail; | |
1184 | ||
1185 | /* | |
1186 | * Check for inode number is _not_ due to possible IO errors. | |
1187 | * We might rmdir the source, keep it as pwd of some process | |
1188 | * and merrily kill the link to whatever was created under the | |
1189 | * same name. Goodbye sticky bit ;-< | |
1190 | */ | |
1191 | if (le64_to_cpu(old_de->inode) != OCFS2_I(old_inode)->ip_blkno) | |
1192 | goto bail; | |
1193 | ||
1194 | /* check if the target already exists (in which case we need | |
1195 | * to delete it */ | |
1196 | status = ocfs2_find_files_on_disk(new_dentry->d_name.name, | |
1197 | new_dentry->d_name.len, | |
1198 | &newfe_blkno, new_dir, &new_de_bh, | |
1199 | &new_de); | |
1200 | /* The only error we allow here is -ENOENT because the new | |
1201 | * file not existing is perfectly valid. */ | |
1202 | if ((status < 0) && (status != -ENOENT)) { | |
1203 | /* If we cannot find the file specified we should just */ | |
1204 | /* return the error... */ | |
1205 | mlog_errno(status); | |
1206 | goto bail; | |
1207 | } | |
1208 | ||
1209 | if (!new_de && new_inode) | |
1210 | mlog(ML_ERROR, "inode %lu does not exist in it's parent " | |
1211 | "directory!", new_inode->i_ino); | |
1212 | ||
1213 | /* In case we need to overwrite an existing file, we blow it | |
1214 | * away first */ | |
1215 | if (new_de) { | |
1216 | /* VFS didn't think there existed an inode here, but | |
1217 | * someone else in the cluster must have raced our | |
1218 | * rename to create one. Today we error cleanly, in | |
1219 | * the future we should consider calling iget to build | |
1220 | * a new struct inode for this entry. */ | |
1221 | if (!new_inode) { | |
1222 | status = -EACCES; | |
1223 | ||
1224 | mlog(0, "We found an inode for name %.*s but VFS " | |
1225 | "didn't give us one.\n", new_dentry->d_name.len, | |
1226 | new_dentry->d_name.name); | |
1227 | goto bail; | |
1228 | } | |
1229 | ||
1230 | if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { | |
1231 | status = -EACCES; | |
1232 | ||
b0697053 MF |
1233 | mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n", |
1234 | (unsigned long long)OCFS2_I(new_inode)->ip_blkno, | |
1235 | (unsigned long long)newfe_blkno, | |
ccd979bd MF |
1236 | OCFS2_I(new_inode)->ip_flags); |
1237 | goto bail; | |
1238 | } | |
1239 | ||
4bcec184 | 1240 | status = ocfs2_meta_lock(new_inode, &newfe_bh, 1); |
ccd979bd MF |
1241 | if (status < 0) { |
1242 | if (status != -ENOENT) | |
1243 | mlog_errno(status); | |
1244 | goto bail; | |
1245 | } | |
8d5596c6 | 1246 | new_child_locked = 1; |
ccd979bd | 1247 | |
379dfe9d | 1248 | status = ocfs2_remote_dentry_delete(new_dentry); |
ccd979bd MF |
1249 | if (status < 0) { |
1250 | mlog_errno(status); | |
1251 | goto bail; | |
1252 | } | |
1253 | ||
1254 | newfe = (struct ocfs2_dinode *) newfe_bh->b_data; | |
1255 | ||
b0697053 MF |
1256 | mlog(0, "aha rename over existing... new_de=%p new_blkno=%llu " |
1257 | "newfebh=%p bhblocknr=%llu\n", new_de, | |
1258 | (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? | |
ccd979bd MF |
1259 | (unsigned long long)newfe_bh->b_blocknr : 0ULL); |
1260 | ||
1261 | if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { | |
5098c27b | 1262 | status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, |
ccd979bd MF |
1263 | new_inode, |
1264 | orphan_name, | |
1265 | &orphan_entry_bh); | |
1266 | if (status < 0) { | |
1267 | mlog_errno(status); | |
1268 | goto bail; | |
1269 | } | |
1270 | } | |
1271 | } else { | |
1272 | BUG_ON(new_dentry->d_parent->d_inode != new_dir); | |
1273 | ||
1274 | status = ocfs2_check_dir_for_entry(new_dir, | |
1275 | new_dentry->d_name.name, | |
1276 | new_dentry->d_name.len); | |
1277 | if (status) | |
1278 | goto bail; | |
1279 | ||
1280 | status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, | |
1281 | new_dentry->d_name.name, | |
1282 | new_dentry->d_name.len, | |
1283 | &insert_entry_bh); | |
1284 | if (status < 0) { | |
1285 | mlog_errno(status); | |
1286 | goto bail; | |
1287 | } | |
1288 | } | |
1289 | ||
65eff9cc | 1290 | handle = ocfs2_start_trans(osb, OCFS2_RENAME_CREDITS); |
ccd979bd MF |
1291 | if (IS_ERR(handle)) { |
1292 | status = PTR_ERR(handle); | |
1293 | handle = NULL; | |
1294 | mlog_errno(status); | |
1295 | goto bail; | |
1296 | } | |
1297 | ||
1298 | if (new_de) { | |
1299 | if (S_ISDIR(new_inode->i_mode)) { | |
1300 | if (!ocfs2_empty_dir(new_inode) || | |
1301 | new_inode->i_nlink != 2) { | |
1302 | status = -ENOTEMPTY; | |
1303 | goto bail; | |
1304 | } | |
1305 | } | |
1306 | status = ocfs2_journal_access(handle, new_inode, newfe_bh, | |
1307 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1308 | if (status < 0) { | |
1309 | mlog_errno(status); | |
1310 | goto bail; | |
1311 | } | |
1312 | ||
1313 | if (S_ISDIR(new_inode->i_mode) || | |
1314 | (newfe->i_links_count == cpu_to_le16(1))){ | |
1315 | status = ocfs2_orphan_add(osb, handle, new_inode, | |
1316 | newfe, orphan_name, | |
5098c27b | 1317 | orphan_entry_bh, orphan_dir); |
ccd979bd MF |
1318 | if (status < 0) { |
1319 | mlog_errno(status); | |
1320 | goto bail; | |
1321 | } | |
1322 | } | |
1323 | ||
1324 | /* change the dirent to point to the correct inode */ | |
1325 | status = ocfs2_journal_access(handle, new_dir, new_de_bh, | |
1326 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1327 | if (status < 0) { | |
1328 | mlog_errno(status); | |
1329 | goto bail; | |
1330 | } | |
1331 | new_de->inode = cpu_to_le64(OCFS2_I(old_inode)->ip_blkno); | |
1332 | new_de->file_type = old_de->file_type; | |
1333 | new_dir->i_version++; | |
1334 | status = ocfs2_journal_dirty(handle, new_de_bh); | |
1335 | if (status < 0) { | |
1336 | mlog_errno(status); | |
1337 | goto bail; | |
1338 | } | |
1339 | ||
1340 | if (S_ISDIR(new_inode->i_mode)) | |
1341 | newfe->i_links_count = 0; | |
1342 | else | |
1343 | le16_add_cpu(&newfe->i_links_count, -1); | |
1344 | ||
1345 | status = ocfs2_journal_dirty(handle, newfe_bh); | |
1346 | if (status < 0) { | |
1347 | mlog_errno(status); | |
1348 | goto bail; | |
1349 | } | |
1350 | } else { | |
1351 | /* if the name was not found in new_dir, add it now */ | |
1352 | status = ocfs2_add_entry(handle, new_dentry, old_inode, | |
1353 | OCFS2_I(old_inode)->ip_blkno, | |
1354 | new_dir_bh, insert_entry_bh); | |
1355 | } | |
1356 | ||
1357 | old_inode->i_ctime = CURRENT_TIME; | |
1358 | mark_inode_dirty(old_inode); | |
592282cf | 1359 | ocfs2_mark_inode_dirty(handle, old_inode, old_inode_bh); |
ccd979bd MF |
1360 | |
1361 | /* now that the name has been added to new_dir, remove the old name */ | |
1362 | status = ocfs2_delete_entry(handle, old_dir, old_de, old_de_bh); | |
1363 | if (status < 0) { | |
1364 | mlog_errno(status); | |
1365 | goto bail; | |
1366 | } | |
1367 | ||
1368 | if (new_inode) { | |
1369 | new_inode->i_nlink--; | |
1370 | new_inode->i_ctime = CURRENT_TIME; | |
1371 | } | |
1372 | old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME; | |
1373 | if (old_inode_de_bh) { | |
1374 | status = ocfs2_journal_access(handle, old_inode, | |
1375 | old_inode_de_bh, | |
1376 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1377 | PARENT_INO(old_inode_de_bh->b_data) = | |
1378 | cpu_to_le64(OCFS2_I(new_dir)->ip_blkno); | |
1379 | status = ocfs2_journal_dirty(handle, old_inode_de_bh); | |
1380 | old_dir->i_nlink--; | |
1381 | if (new_inode) { | |
1382 | new_inode->i_nlink--; | |
1383 | } else { | |
d8c76e6f | 1384 | inc_nlink(new_dir); |
ccd979bd MF |
1385 | mark_inode_dirty(new_dir); |
1386 | } | |
1387 | } | |
1388 | mark_inode_dirty(old_dir); | |
592282cf MF |
1389 | ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh); |
1390 | if (new_inode) { | |
ccd979bd | 1391 | mark_inode_dirty(new_inode); |
592282cf MF |
1392 | ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh); |
1393 | } | |
ccd979bd | 1394 | |
592282cf MF |
1395 | if (old_dir != new_dir) { |
1396 | /* Keep the same times on both directories.*/ | |
1397 | new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime; | |
1398 | ||
1399 | /* | |
1400 | * This will also pick up the i_nlink change from the | |
1401 | * block above. | |
1402 | */ | |
1403 | ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh); | |
1404 | } | |
ccd979bd MF |
1405 | |
1406 | if (old_dir_nlink != old_dir->i_nlink) { | |
1407 | if (!old_dir_bh) { | |
1408 | mlog(ML_ERROR, "need to change nlink for old dir " | |
b0697053 MF |
1409 | "%llu from %d to %d but bh is NULL!\n", |
1410 | (unsigned long long)OCFS2_I(old_dir)->ip_blkno, | |
1411 | (int)old_dir_nlink, old_dir->i_nlink); | |
ccd979bd MF |
1412 | } else { |
1413 | struct ocfs2_dinode *fe; | |
1414 | status = ocfs2_journal_access(handle, old_dir, | |
1415 | old_dir_bh, | |
1416 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1417 | fe = (struct ocfs2_dinode *) old_dir_bh->b_data; | |
1418 | fe->i_links_count = cpu_to_le16(old_dir->i_nlink); | |
1419 | status = ocfs2_journal_dirty(handle, old_dir_bh); | |
1420 | } | |
1421 | } | |
1422 | ||
379dfe9d | 1423 | ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); |
ccd979bd MF |
1424 | status = 0; |
1425 | bail: | |
1426 | if (rename_lock) | |
1427 | ocfs2_rename_unlock(osb); | |
1428 | ||
1429 | if (handle) | |
02dc1af4 | 1430 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 1431 | |
8d5596c6 MF |
1432 | if (parents_locked) |
1433 | ocfs2_double_unlock(old_dir, new_dir); | |
1434 | ||
1435 | if (old_child_locked) | |
1436 | ocfs2_meta_unlock(old_inode, 1); | |
1437 | ||
1438 | if (new_child_locked) | |
1439 | ocfs2_meta_unlock(new_inode, 1); | |
1440 | ||
5098c27b MF |
1441 | if (orphan_dir) { |
1442 | /* This was locked for us in ocfs2_prepare_orphan_dir() */ | |
1443 | ocfs2_meta_unlock(orphan_dir, 1); | |
1444 | mutex_unlock(&orphan_dir->i_mutex); | |
1445 | iput(orphan_dir); | |
1446 | } | |
1447 | ||
ccd979bd MF |
1448 | if (new_inode) |
1449 | sync_mapping_buffers(old_inode->i_mapping); | |
1450 | ||
1451 | if (new_inode) | |
1452 | iput(new_inode); | |
1453 | if (newfe_bh) | |
1454 | brelse(newfe_bh); | |
592282cf MF |
1455 | if (old_inode_bh) |
1456 | brelse(old_inode_bh); | |
ccd979bd MF |
1457 | if (old_dir_bh) |
1458 | brelse(old_dir_bh); | |
1459 | if (new_dir_bh) | |
1460 | brelse(new_dir_bh); | |
1461 | if (new_de_bh) | |
1462 | brelse(new_de_bh); | |
1463 | if (old_de_bh) | |
1464 | brelse(old_de_bh); | |
1465 | if (old_inode_de_bh) | |
1466 | brelse(old_inode_de_bh); | |
1467 | if (orphan_entry_bh) | |
1468 | brelse(orphan_entry_bh); | |
1469 | if (insert_entry_bh) | |
1470 | brelse(insert_entry_bh); | |
1471 | ||
1472 | mlog_exit(status); | |
1473 | ||
1474 | return status; | |
1475 | } | |
1476 | ||
1477 | /* | |
1478 | * we expect i_size = strlen(symname). Copy symname into the file | |
1479 | * data, including the null terminator. | |
1480 | */ | |
1481 | static int ocfs2_create_symlink_data(struct ocfs2_super *osb, | |
1fabe148 | 1482 | handle_t *handle, |
ccd979bd MF |
1483 | struct inode *inode, |
1484 | const char *symname) | |
1485 | { | |
1486 | struct buffer_head **bhs = NULL; | |
1487 | const char *c; | |
1488 | struct super_block *sb = osb->sb; | |
1489 | u64 p_blkno; | |
1490 | int p_blocks; | |
1491 | int virtual, blocks, status, i, bytes_left; | |
1492 | ||
1493 | bytes_left = i_size_read(inode) + 1; | |
1494 | /* we can't trust i_blocks because we're actually going to | |
1495 | * write i_size + 1 bytes. */ | |
1496 | blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; | |
1497 | ||
5515eff8 AM |
1498 | mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n", |
1499 | (unsigned long long)inode->i_blocks, | |
1500 | i_size_read(inode), blocks); | |
ccd979bd MF |
1501 | |
1502 | /* Sanity check -- make sure we're going to fit. */ | |
1503 | if (bytes_left > | |
1504 | ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { | |
1505 | status = -EIO; | |
1506 | mlog_errno(status); | |
1507 | goto bail; | |
1508 | } | |
1509 | ||
1510 | bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); | |
1511 | if (!bhs) { | |
1512 | status = -ENOMEM; | |
1513 | mlog_errno(status); | |
1514 | goto bail; | |
1515 | } | |
1516 | ||
1517 | status = ocfs2_extent_map_get_blocks(inode, 0, 1, &p_blkno, | |
1518 | &p_blocks); | |
1519 | if (status < 0) { | |
1520 | mlog_errno(status); | |
1521 | goto bail; | |
1522 | } | |
1523 | ||
1524 | /* links can never be larger than one cluster so we know this | |
1525 | * is all going to be contiguous, but do a sanity check | |
1526 | * anyway. */ | |
1527 | if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { | |
1528 | status = -EIO; | |
1529 | mlog_errno(status); | |
1530 | goto bail; | |
1531 | } | |
1532 | ||
1533 | virtual = 0; | |
1534 | while(bytes_left > 0) { | |
1535 | c = &symname[virtual * sb->s_blocksize]; | |
1536 | ||
1537 | bhs[virtual] = sb_getblk(sb, p_blkno); | |
1538 | if (!bhs[virtual]) { | |
1539 | status = -ENOMEM; | |
1540 | mlog_errno(status); | |
1541 | goto bail; | |
1542 | } | |
1543 | ocfs2_set_new_buffer_uptodate(inode, bhs[virtual]); | |
1544 | ||
1545 | status = ocfs2_journal_access(handle, inode, bhs[virtual], | |
1546 | OCFS2_JOURNAL_ACCESS_CREATE); | |
1547 | if (status < 0) { | |
1548 | mlog_errno(status); | |
1549 | goto bail; | |
1550 | } | |
1551 | ||
1552 | memset(bhs[virtual]->b_data, 0, sb->s_blocksize); | |
1553 | ||
1554 | memcpy(bhs[virtual]->b_data, c, | |
1555 | (bytes_left > sb->s_blocksize) ? sb->s_blocksize : | |
1556 | bytes_left); | |
1557 | ||
1558 | status = ocfs2_journal_dirty(handle, bhs[virtual]); | |
1559 | if (status < 0) { | |
1560 | mlog_errno(status); | |
1561 | goto bail; | |
1562 | } | |
1563 | ||
1564 | virtual++; | |
1565 | p_blkno++; | |
1566 | bytes_left -= sb->s_blocksize; | |
1567 | } | |
1568 | ||
1569 | status = 0; | |
1570 | bail: | |
1571 | ||
1572 | if (bhs) { | |
1573 | for(i = 0; i < blocks; i++) | |
1574 | if (bhs[i]) | |
1575 | brelse(bhs[i]); | |
1576 | kfree(bhs); | |
1577 | } | |
1578 | ||
1579 | mlog_exit(status); | |
1580 | return status; | |
1581 | } | |
1582 | ||
1583 | static int ocfs2_symlink(struct inode *dir, | |
1584 | struct dentry *dentry, | |
1585 | const char *symname) | |
1586 | { | |
1587 | int status, l, credits; | |
1588 | u64 newsize; | |
1589 | struct ocfs2_super *osb = NULL; | |
1590 | struct inode *inode = NULL; | |
1591 | struct super_block *sb; | |
1592 | struct buffer_head *new_fe_bh = NULL; | |
1593 | struct buffer_head *de_bh = NULL; | |
1594 | struct buffer_head *parent_fe_bh = NULL; | |
1595 | struct ocfs2_dinode *fe = NULL; | |
1596 | struct ocfs2_dinode *dirfe; | |
1fabe148 | 1597 | handle_t *handle = NULL; |
ccd979bd MF |
1598 | struct ocfs2_alloc_context *inode_ac = NULL; |
1599 | struct ocfs2_alloc_context *data_ac = NULL; | |
1600 | ||
1601 | mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir, | |
1602 | dentry, symname, dentry->d_name.len, dentry->d_name.name); | |
1603 | ||
1604 | sb = dir->i_sb; | |
1605 | osb = OCFS2_SB(sb); | |
1606 | ||
1607 | l = strlen(symname) + 1; | |
1608 | ||
1609 | credits = ocfs2_calc_symlink_credits(sb); | |
1610 | ||
ccd979bd | 1611 | /* lock the parent directory */ |
4bcec184 | 1612 | status = ocfs2_meta_lock(dir, &parent_fe_bh, 1); |
ccd979bd MF |
1613 | if (status < 0) { |
1614 | if (status != -ENOENT) | |
1615 | mlog_errno(status); | |
6d8fc40e | 1616 | return status; |
ccd979bd MF |
1617 | } |
1618 | ||
1619 | dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; | |
1620 | if (!dirfe->i_links_count) { | |
1621 | /* can't make a file in a deleted directory. */ | |
1622 | status = -ENOENT; | |
1623 | goto bail; | |
1624 | } | |
1625 | ||
1626 | status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, | |
1627 | dentry->d_name.len); | |
1628 | if (status) | |
1629 | goto bail; | |
1630 | ||
1631 | status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, | |
1632 | dentry->d_name.name, | |
1633 | dentry->d_name.len, &de_bh); | |
1634 | if (status < 0) { | |
1635 | mlog_errno(status); | |
1636 | goto bail; | |
1637 | } | |
1638 | ||
da5cbf2f | 1639 | status = ocfs2_reserve_new_inode(osb, &inode_ac); |
ccd979bd MF |
1640 | if (status < 0) { |
1641 | if (status != -ENOSPC) | |
1642 | mlog_errno(status); | |
1643 | goto bail; | |
1644 | } | |
1645 | ||
1646 | /* don't reserve bitmap space for fast symlinks. */ | |
1647 | if (l > ocfs2_fast_symlink_chars(sb)) { | |
da5cbf2f | 1648 | status = ocfs2_reserve_clusters(osb, 1, &data_ac); |
ccd979bd MF |
1649 | if (status < 0) { |
1650 | if (status != -ENOSPC) | |
1651 | mlog_errno(status); | |
1652 | goto bail; | |
1653 | } | |
1654 | } | |
1655 | ||
65eff9cc | 1656 | handle = ocfs2_start_trans(osb, credits); |
ccd979bd MF |
1657 | if (IS_ERR(handle)) { |
1658 | status = PTR_ERR(handle); | |
1659 | handle = NULL; | |
1660 | mlog_errno(status); | |
1661 | goto bail; | |
1662 | } | |
1663 | ||
1664 | status = ocfs2_mknod_locked(osb, dir, dentry, | |
1665 | S_IFLNK | S_IRWXUGO, 0, | |
1666 | &new_fe_bh, parent_fe_bh, handle, | |
1667 | &inode, inode_ac); | |
1668 | if (status < 0) { | |
1669 | mlog_errno(status); | |
1670 | goto bail; | |
1671 | } | |
1672 | ||
1673 | fe = (struct ocfs2_dinode *) new_fe_bh->b_data; | |
1674 | inode->i_rdev = 0; | |
1675 | newsize = l - 1; | |
1676 | if (l > ocfs2_fast_symlink_chars(sb)) { | |
1677 | inode->i_op = &ocfs2_symlink_inode_operations; | |
1678 | status = ocfs2_do_extend_allocation(osb, inode, 1, new_fe_bh, | |
1679 | handle, data_ac, NULL, | |
1680 | NULL); | |
1681 | if (status < 0) { | |
1682 | if (status != -ENOSPC && status != -EINTR) { | |
b0697053 MF |
1683 | mlog(ML_ERROR, |
1684 | "Failed to extend file to %llu\n", | |
1685 | (unsigned long long)newsize); | |
ccd979bd MF |
1686 | mlog_errno(status); |
1687 | status = -ENOSPC; | |
1688 | } | |
1689 | goto bail; | |
1690 | } | |
1691 | i_size_write(inode, newsize); | |
1692 | inode->i_blocks = ocfs2_align_bytes_to_sectors(newsize); | |
1693 | } else { | |
1694 | inode->i_op = &ocfs2_fast_symlink_inode_operations; | |
1695 | memcpy((char *) fe->id2.i_symlink, symname, l); | |
1696 | i_size_write(inode, newsize); | |
1697 | inode->i_blocks = 0; | |
1698 | } | |
1699 | ||
1700 | status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); | |
1701 | if (status < 0) { | |
1702 | mlog_errno(status); | |
1703 | goto bail; | |
1704 | } | |
1705 | ||
1706 | if (!ocfs2_inode_is_fast_symlink(inode)) { | |
1707 | status = ocfs2_create_symlink_data(osb, handle, inode, | |
1708 | symname); | |
1709 | if (status < 0) { | |
1710 | mlog_errno(status); | |
1711 | goto bail; | |
1712 | } | |
1713 | } | |
1714 | ||
1715 | status = ocfs2_add_entry(handle, dentry, inode, | |
1716 | le64_to_cpu(fe->i_blkno), parent_fe_bh, | |
1717 | de_bh); | |
1718 | if (status < 0) { | |
1719 | mlog_errno(status); | |
1720 | goto bail; | |
1721 | } | |
1722 | ||
0027dd5b | 1723 | status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); |
379dfe9d MF |
1724 | if (status) { |
1725 | mlog_errno(status); | |
1726 | goto bail; | |
1727 | } | |
1728 | ||
ccd979bd MF |
1729 | insert_inode_hash(inode); |
1730 | dentry->d_op = &ocfs2_dentry_ops; | |
1731 | d_instantiate(dentry, inode); | |
1732 | bail: | |
1733 | if (handle) | |
02dc1af4 | 1734 | ocfs2_commit_trans(osb, handle); |
6d8fc40e MF |
1735 | |
1736 | ocfs2_meta_unlock(dir, 1); | |
1737 | ||
ccd979bd MF |
1738 | if (new_fe_bh) |
1739 | brelse(new_fe_bh); | |
1740 | if (parent_fe_bh) | |
1741 | brelse(parent_fe_bh); | |
1742 | if (de_bh) | |
1743 | brelse(de_bh); | |
1744 | if (inode_ac) | |
1745 | ocfs2_free_alloc_context(inode_ac); | |
1746 | if (data_ac) | |
1747 | ocfs2_free_alloc_context(data_ac); | |
1748 | if ((status < 0) && inode) | |
1749 | iput(inode); | |
1750 | ||
1751 | mlog_exit(status); | |
1752 | ||
1753 | return status; | |
1754 | } | |
1755 | ||
1756 | int ocfs2_check_dir_entry(struct inode * dir, | |
1757 | struct ocfs2_dir_entry * de, | |
1758 | struct buffer_head * bh, | |
1759 | unsigned long offset) | |
1760 | { | |
1761 | const char *error_msg = NULL; | |
1762 | const int rlen = le16_to_cpu(de->rec_len); | |
1763 | ||
1764 | if (rlen < OCFS2_DIR_REC_LEN(1)) | |
1765 | error_msg = "rec_len is smaller than minimal"; | |
1766 | else if (rlen % 4 != 0) | |
1767 | error_msg = "rec_len % 4 != 0"; | |
1768 | else if (rlen < OCFS2_DIR_REC_LEN(de->name_len)) | |
1769 | error_msg = "rec_len is too small for name_len"; | |
1770 | else if (((char *) de - bh->b_data) + rlen > dir->i_sb->s_blocksize) | |
1771 | error_msg = "directory entry across blocks"; | |
1772 | ||
1773 | if (error_msg != NULL) | |
b0697053 MF |
1774 | mlog(ML_ERROR, "bad entry in directory #%llu: %s - " |
1775 | "offset=%lu, inode=%llu, rec_len=%d, name_len=%d\n", | |
1776 | (unsigned long long)OCFS2_I(dir)->ip_blkno, error_msg, | |
1777 | offset, (unsigned long long)le64_to_cpu(de->inode), rlen, | |
1778 | de->name_len); | |
ccd979bd MF |
1779 | return error_msg == NULL ? 1 : 0; |
1780 | } | |
1781 | ||
1782 | /* we don't always have a dentry for what we want to add, so people | |
1783 | * like orphan dir can call this instead. | |
1784 | * | |
1785 | * If you pass me insert_bh, I'll skip the search of the other dir | |
1786 | * blocks and put the record in there. | |
1787 | */ | |
1fabe148 | 1788 | static int __ocfs2_add_entry(handle_t *handle, |
ccd979bd MF |
1789 | struct inode *dir, |
1790 | const char *name, int namelen, | |
1791 | struct inode *inode, u64 blkno, | |
1792 | struct buffer_head *parent_fe_bh, | |
1793 | struct buffer_head *insert_bh) | |
1794 | { | |
1795 | unsigned long offset; | |
1796 | unsigned short rec_len; | |
1797 | struct ocfs2_dir_entry *de, *de1; | |
1798 | struct super_block *sb; | |
1799 | int retval, status; | |
1800 | ||
1801 | mlog_entry_void(); | |
1802 | ||
1803 | sb = dir->i_sb; | |
1804 | ||
1805 | if (!namelen) | |
1806 | return -EINVAL; | |
1807 | ||
1808 | rec_len = OCFS2_DIR_REC_LEN(namelen); | |
1809 | offset = 0; | |
1810 | de = (struct ocfs2_dir_entry *) insert_bh->b_data; | |
1811 | while (1) { | |
1812 | BUG_ON((char *)de >= sb->s_blocksize + insert_bh->b_data); | |
1813 | /* These checks should've already been passed by the | |
1814 | * prepare function, but I guess we can leave them | |
1815 | * here anyway. */ | |
1816 | if (!ocfs2_check_dir_entry(dir, de, insert_bh, offset)) { | |
1817 | retval = -ENOENT; | |
1818 | goto bail; | |
1819 | } | |
1820 | if (ocfs2_match(namelen, name, de)) { | |
1821 | retval = -EEXIST; | |
1822 | goto bail; | |
1823 | } | |
1824 | if (((le64_to_cpu(de->inode) == 0) && | |
1825 | (le16_to_cpu(de->rec_len) >= rec_len)) || | |
1826 | (le16_to_cpu(de->rec_len) >= | |
1827 | (OCFS2_DIR_REC_LEN(de->name_len) + rec_len))) { | |
592282cf MF |
1828 | dir->i_mtime = dir->i_ctime = CURRENT_TIME; |
1829 | retval = ocfs2_mark_inode_dirty(handle, dir, parent_fe_bh); | |
1830 | if (retval < 0) { | |
1831 | mlog_errno(retval); | |
1832 | goto bail; | |
1833 | } | |
1834 | ||
ccd979bd MF |
1835 | status = ocfs2_journal_access(handle, dir, insert_bh, |
1836 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1837 | /* By now the buffer is marked for journaling */ | |
1838 | offset += le16_to_cpu(de->rec_len); | |
1839 | if (le64_to_cpu(de->inode)) { | |
1840 | de1 = (struct ocfs2_dir_entry *)((char *) de + | |
1841 | OCFS2_DIR_REC_LEN(de->name_len)); | |
1842 | de1->rec_len = | |
1843 | cpu_to_le16(le16_to_cpu(de->rec_len) - | |
1844 | OCFS2_DIR_REC_LEN(de->name_len)); | |
1845 | de->rec_len = cpu_to_le16(OCFS2_DIR_REC_LEN(de->name_len)); | |
1846 | de = de1; | |
1847 | } | |
1848 | de->file_type = OCFS2_FT_UNKNOWN; | |
1849 | if (blkno) { | |
1850 | de->inode = cpu_to_le64(blkno); | |
1851 | ocfs2_set_de_type(de, inode->i_mode); | |
1852 | } else | |
1853 | de->inode = 0; | |
1854 | de->name_len = namelen; | |
1855 | memcpy(de->name, name, namelen); | |
1856 | ||
ccd979bd MF |
1857 | dir->i_version++; |
1858 | status = ocfs2_journal_dirty(handle, insert_bh); | |
1859 | retval = 0; | |
1860 | goto bail; | |
1861 | } | |
1862 | offset += le16_to_cpu(de->rec_len); | |
1863 | de = (struct ocfs2_dir_entry *) ((char *) de + le16_to_cpu(de->rec_len)); | |
1864 | } | |
1865 | ||
1866 | /* when you think about it, the assert above should prevent us | |
1867 | * from ever getting here. */ | |
1868 | retval = -ENOSPC; | |
1869 | bail: | |
1870 | ||
1871 | mlog_exit(retval); | |
1872 | return retval; | |
1873 | } | |
1874 | ||
1875 | ||
1876 | /* | |
1877 | * ocfs2_delete_entry deletes a directory entry by merging it with the | |
1878 | * previous entry | |
1879 | */ | |
1fabe148 | 1880 | static int ocfs2_delete_entry(handle_t *handle, |
ccd979bd MF |
1881 | struct inode *dir, |
1882 | struct ocfs2_dir_entry *de_del, | |
1883 | struct buffer_head *bh) | |
1884 | { | |
1885 | struct ocfs2_dir_entry *de, *pde; | |
1886 | int i, status = -ENOENT; | |
1887 | ||
1888 | mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p)\n", handle, dir, de_del, bh); | |
1889 | ||
1890 | i = 0; | |
1891 | pde = NULL; | |
1892 | de = (struct ocfs2_dir_entry *) bh->b_data; | |
1893 | while (i < bh->b_size) { | |
1894 | if (!ocfs2_check_dir_entry(dir, de, bh, i)) { | |
1895 | status = -EIO; | |
1896 | mlog_errno(status); | |
1897 | goto bail; | |
1898 | } | |
1899 | if (de == de_del) { | |
1900 | status = ocfs2_journal_access(handle, dir, bh, | |
1901 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1902 | if (status < 0) { | |
1903 | status = -EIO; | |
1904 | mlog_errno(status); | |
1905 | goto bail; | |
1906 | } | |
1907 | if (pde) | |
1908 | pde->rec_len = | |
1909 | cpu_to_le16(le16_to_cpu(pde->rec_len) + | |
1910 | le16_to_cpu(de->rec_len)); | |
1911 | else | |
1912 | de->inode = 0; | |
1913 | dir->i_version++; | |
1914 | status = ocfs2_journal_dirty(handle, bh); | |
1915 | goto bail; | |
1916 | } | |
1917 | i += le16_to_cpu(de->rec_len); | |
1918 | pde = de; | |
1919 | de = (struct ocfs2_dir_entry *)((char *)de + le16_to_cpu(de->rec_len)); | |
1920 | } | |
1921 | bail: | |
1922 | mlog_exit(status); | |
1923 | return status; | |
1924 | } | |
1925 | ||
1926 | /* | |
1927 | * Returns 0 if not found, -1 on failure, and 1 on success | |
1928 | */ | |
1929 | static int inline ocfs2_search_dirblock(struct buffer_head *bh, | |
1930 | struct inode *dir, | |
1931 | const char *name, int namelen, | |
1932 | unsigned long offset, | |
1933 | struct ocfs2_dir_entry **res_dir) | |
1934 | { | |
1935 | struct ocfs2_dir_entry *de; | |
1936 | char *dlimit, *de_buf; | |
1937 | int de_len; | |
1938 | int ret = 0; | |
1939 | ||
1940 | mlog_entry_void(); | |
1941 | ||
1942 | de_buf = bh->b_data; | |
1943 | dlimit = de_buf + dir->i_sb->s_blocksize; | |
1944 | ||
1945 | while (de_buf < dlimit) { | |
1946 | /* this code is executed quadratically often */ | |
1947 | /* do minimal checking `by hand' */ | |
1948 | ||
1949 | de = (struct ocfs2_dir_entry *) de_buf; | |
1950 | ||
1951 | if (de_buf + namelen <= dlimit && | |
1952 | ocfs2_match(namelen, name, de)) { | |
1953 | /* found a match - just to be sure, do a full check */ | |
1954 | if (!ocfs2_check_dir_entry(dir, de, bh, offset)) { | |
1955 | ret = -1; | |
1956 | goto bail; | |
1957 | } | |
1958 | *res_dir = de; | |
1959 | ret = 1; | |
1960 | goto bail; | |
1961 | } | |
1962 | ||
1963 | /* prevent looping on a bad block */ | |
1964 | de_len = le16_to_cpu(de->rec_len); | |
1965 | if (de_len <= 0) { | |
1966 | ret = -1; | |
1967 | goto bail; | |
1968 | } | |
1969 | ||
1970 | de_buf += de_len; | |
1971 | offset += de_len; | |
1972 | } | |
1973 | ||
1974 | bail: | |
1975 | mlog_exit(ret); | |
1976 | return ret; | |
1977 | } | |
1978 | ||
1979 | struct buffer_head *ocfs2_find_entry(const char *name, int namelen, | |
1980 | struct inode *dir, | |
1981 | struct ocfs2_dir_entry **res_dir) | |
1982 | { | |
1983 | struct super_block *sb; | |
1984 | struct buffer_head *bh_use[NAMEI_RA_SIZE]; | |
1985 | struct buffer_head *bh, *ret = NULL; | |
1986 | unsigned long start, block, b; | |
1987 | int ra_max = 0; /* Number of bh's in the readahead | |
1988 | buffer, bh_use[] */ | |
1989 | int ra_ptr = 0; /* Current index into readahead | |
1990 | buffer */ | |
1991 | int num = 0; | |
1992 | int nblocks, i, err; | |
1993 | ||
1994 | mlog_entry_void(); | |
1995 | ||
1996 | *res_dir = NULL; | |
1997 | sb = dir->i_sb; | |
1998 | ||
1999 | nblocks = i_size_read(dir) >> sb->s_blocksize_bits; | |
2000 | start = OCFS2_I(dir)->ip_dir_start_lookup; | |
2001 | if (start >= nblocks) | |
2002 | start = 0; | |
2003 | block = start; | |
2004 | ||
2005 | restart: | |
2006 | do { | |
2007 | /* | |
2008 | * We deal with the read-ahead logic here. | |
2009 | */ | |
2010 | if (ra_ptr >= ra_max) { | |
2011 | /* Refill the readahead buffer */ | |
2012 | ra_ptr = 0; | |
2013 | b = block; | |
2014 | for (ra_max = 0; ra_max < NAMEI_RA_SIZE; ra_max++) { | |
2015 | /* | |
2016 | * Terminate if we reach the end of the | |
2017 | * directory and must wrap, or if our | |
2018 | * search has finished at this block. | |
2019 | */ | |
2020 | if (b >= nblocks || (num && block == start)) { | |
2021 | bh_use[ra_max] = NULL; | |
2022 | break; | |
2023 | } | |
2024 | num++; | |
2025 | ||
ccd979bd MF |
2026 | bh = ocfs2_bread(dir, b++, &err, 1); |
2027 | bh_use[ra_max] = bh; | |
ccd979bd MF |
2028 | } |
2029 | } | |
2030 | if ((bh = bh_use[ra_ptr++]) == NULL) | |
2031 | goto next; | |
2032 | wait_on_buffer(bh); | |
2033 | if (!buffer_uptodate(bh)) { | |
2034 | /* read error, skip block & hope for the best */ | |
aa958874 MF |
2035 | ocfs2_error(dir->i_sb, "reading directory %llu, " |
2036 | "offset %lu\n", | |
2037 | (unsigned long long)OCFS2_I(dir)->ip_blkno, | |
2038 | block); | |
ccd979bd MF |
2039 | brelse(bh); |
2040 | goto next; | |
2041 | } | |
2042 | i = ocfs2_search_dirblock(bh, dir, name, namelen, | |
2043 | block << sb->s_blocksize_bits, | |
2044 | res_dir); | |
2045 | if (i == 1) { | |
2046 | OCFS2_I(dir)->ip_dir_start_lookup = block; | |
2047 | ret = bh; | |
2048 | goto cleanup_and_exit; | |
2049 | } else { | |
2050 | brelse(bh); | |
2051 | if (i < 0) | |
2052 | goto cleanup_and_exit; | |
2053 | } | |
2054 | next: | |
2055 | if (++block >= nblocks) | |
2056 | block = 0; | |
2057 | } while (block != start); | |
2058 | ||
2059 | /* | |
2060 | * If the directory has grown while we were searching, then | |
2061 | * search the last part of the directory before giving up. | |
2062 | */ | |
2063 | block = nblocks; | |
2064 | nblocks = i_size_read(dir) >> sb->s_blocksize_bits; | |
2065 | if (block < nblocks) { | |
2066 | start = 0; | |
2067 | goto restart; | |
2068 | } | |
2069 | ||
2070 | cleanup_and_exit: | |
2071 | /* Clean up the read-ahead blocks */ | |
2072 | for (; ra_ptr < ra_max; ra_ptr++) | |
2073 | brelse(bh_use[ra_ptr]); | |
2074 | ||
2075 | mlog_exit_ptr(ret); | |
2076 | return ret; | |
2077 | } | |
2078 | ||
2079 | static int ocfs2_blkno_stringify(u64 blkno, char *name) | |
2080 | { | |
2081 | int status, namelen; | |
2082 | ||
2083 | mlog_entry_void(); | |
2084 | ||
b0697053 MF |
2085 | namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", |
2086 | (long long)blkno); | |
ccd979bd MF |
2087 | if (namelen <= 0) { |
2088 | if (namelen) | |
2089 | status = namelen; | |
2090 | else | |
2091 | status = -EINVAL; | |
2092 | mlog_errno(status); | |
2093 | goto bail; | |
2094 | } | |
2095 | if (namelen != OCFS2_ORPHAN_NAMELEN) { | |
2096 | status = -EINVAL; | |
2097 | mlog_errno(status); | |
2098 | goto bail; | |
2099 | } | |
2100 | ||
2101 | mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name, | |
2102 | namelen); | |
2103 | ||
2104 | status = 0; | |
2105 | bail: | |
2106 | mlog_exit(status); | |
2107 | return status; | |
2108 | } | |
2109 | ||
2110 | static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, | |
5098c27b | 2111 | struct inode **ret_orphan_dir, |
ccd979bd MF |
2112 | struct inode *inode, |
2113 | char *name, | |
2114 | struct buffer_head **de_bh) | |
2115 | { | |
5098c27b | 2116 | struct inode *orphan_dir_inode; |
ccd979bd MF |
2117 | struct buffer_head *orphan_dir_bh = NULL; |
2118 | int status = 0; | |
2119 | ||
2120 | status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); | |
2121 | if (status < 0) { | |
2122 | mlog_errno(status); | |
5098c27b | 2123 | return status; |
ccd979bd MF |
2124 | } |
2125 | ||
2126 | orphan_dir_inode = ocfs2_get_system_file_inode(osb, | |
2127 | ORPHAN_DIR_SYSTEM_INODE, | |
2128 | osb->slot_num); | |
2129 | if (!orphan_dir_inode) { | |
2130 | status = -ENOENT; | |
2131 | mlog_errno(status); | |
5098c27b | 2132 | return status; |
ccd979bd MF |
2133 | } |
2134 | ||
5098c27b MF |
2135 | mutex_lock(&orphan_dir_inode->i_mutex); |
2136 | ||
4bcec184 | 2137 | status = ocfs2_meta_lock(orphan_dir_inode, &orphan_dir_bh, 1); |
ccd979bd MF |
2138 | if (status < 0) { |
2139 | mlog_errno(status); | |
2140 | goto leave; | |
2141 | } | |
2142 | ||
2143 | status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, | |
2144 | orphan_dir_bh, name, | |
2145 | OCFS2_ORPHAN_NAMELEN, de_bh); | |
2146 | if (status < 0) { | |
5098c27b MF |
2147 | ocfs2_meta_unlock(orphan_dir_inode, 1); |
2148 | ||
ccd979bd MF |
2149 | mlog_errno(status); |
2150 | goto leave; | |
2151 | } | |
2152 | ||
5098c27b MF |
2153 | *ret_orphan_dir = orphan_dir_inode; |
2154 | ||
ccd979bd | 2155 | leave: |
5098c27b MF |
2156 | if (status) { |
2157 | mutex_unlock(&orphan_dir_inode->i_mutex); | |
ccd979bd | 2158 | iput(orphan_dir_inode); |
5098c27b | 2159 | } |
ccd979bd MF |
2160 | |
2161 | if (orphan_dir_bh) | |
2162 | brelse(orphan_dir_bh); | |
2163 | ||
2164 | mlog_exit(status); | |
2165 | return status; | |
2166 | } | |
2167 | ||
2168 | static int ocfs2_orphan_add(struct ocfs2_super *osb, | |
1fabe148 | 2169 | handle_t *handle, |
ccd979bd MF |
2170 | struct inode *inode, |
2171 | struct ocfs2_dinode *fe, | |
2172 | char *name, | |
5098c27b MF |
2173 | struct buffer_head *de_bh, |
2174 | struct inode *orphan_dir_inode) | |
ccd979bd | 2175 | { |
ccd979bd MF |
2176 | struct buffer_head *orphan_dir_bh = NULL; |
2177 | int status = 0; | |
2178 | struct ocfs2_dinode *orphan_fe; | |
2179 | ||
2180 | mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino); | |
2181 | ||
ccd979bd MF |
2182 | status = ocfs2_read_block(osb, |
2183 | OCFS2_I(orphan_dir_inode)->ip_blkno, | |
2184 | &orphan_dir_bh, OCFS2_BH_CACHED, | |
2185 | orphan_dir_inode); | |
2186 | if (status < 0) { | |
2187 | mlog_errno(status); | |
2188 | goto leave; | |
2189 | } | |
2190 | ||
2191 | status = ocfs2_journal_access(handle, orphan_dir_inode, orphan_dir_bh, | |
2192 | OCFS2_JOURNAL_ACCESS_WRITE); | |
2193 | if (status < 0) { | |
2194 | mlog_errno(status); | |
2195 | goto leave; | |
2196 | } | |
2197 | ||
2198 | /* we're a cluster, and nlink can change on disk from | |
2199 | * underneath us... */ | |
2200 | orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; | |
2201 | if (S_ISDIR(inode->i_mode)) | |
2202 | le16_add_cpu(&orphan_fe->i_links_count, 1); | |
2203 | orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count); | |
2204 | ||
2205 | status = ocfs2_journal_dirty(handle, orphan_dir_bh); | |
2206 | if (status < 0) { | |
2207 | mlog_errno(status); | |
2208 | goto leave; | |
2209 | } | |
2210 | ||
2211 | status = __ocfs2_add_entry(handle, orphan_dir_inode, name, | |
2212 | OCFS2_ORPHAN_NAMELEN, inode, | |
2213 | OCFS2_I(inode)->ip_blkno, | |
2214 | orphan_dir_bh, de_bh); | |
2215 | if (status < 0) { | |
2216 | mlog_errno(status); | |
2217 | goto leave; | |
2218 | } | |
2219 | ||
2220 | le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL); | |
2221 | ||
2222 | /* Record which orphan dir our inode now resides | |
2223 | * in. delete_inode will use this to determine which orphan | |
2224 | * dir to lock. */ | |
2225 | spin_lock(&OCFS2_I(inode)->ip_lock); | |
2226 | OCFS2_I(inode)->ip_orphaned_slot = osb->slot_num; | |
2227 | spin_unlock(&OCFS2_I(inode)->ip_lock); | |
2228 | ||
b0697053 MF |
2229 | mlog(0, "Inode %llu orphaned in slot %d\n", |
2230 | (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num); | |
ccd979bd MF |
2231 | |
2232 | leave: | |
ccd979bd MF |
2233 | if (orphan_dir_bh) |
2234 | brelse(orphan_dir_bh); | |
2235 | ||
2236 | mlog_exit(status); | |
2237 | return status; | |
2238 | } | |
2239 | ||
2240 | /* unlike orphan_add, we expect the orphan dir to already be locked here. */ | |
2241 | int ocfs2_orphan_del(struct ocfs2_super *osb, | |
1fabe148 | 2242 | handle_t *handle, |
ccd979bd MF |
2243 | struct inode *orphan_dir_inode, |
2244 | struct inode *inode, | |
2245 | struct buffer_head *orphan_dir_bh) | |
2246 | { | |
2247 | char name[OCFS2_ORPHAN_NAMELEN + 1]; | |
2248 | struct ocfs2_dinode *orphan_fe; | |
2249 | int status = 0; | |
2250 | struct buffer_head *target_de_bh = NULL; | |
2251 | struct ocfs2_dir_entry *target_de = NULL; | |
2252 | ||
2253 | mlog_entry_void(); | |
2254 | ||
2255 | status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); | |
2256 | if (status < 0) { | |
2257 | mlog_errno(status); | |
2258 | goto leave; | |
2259 | } | |
2260 | ||
b0697053 MF |
2261 | mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n", |
2262 | name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, | |
2263 | OCFS2_ORPHAN_NAMELEN); | |
ccd979bd MF |
2264 | |
2265 | /* find it's spot in the orphan directory */ | |
2266 | target_de_bh = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, | |
2267 | orphan_dir_inode, &target_de); | |
2268 | if (!target_de_bh) { | |
2269 | status = -ENOENT; | |
2270 | mlog_errno(status); | |
2271 | goto leave; | |
2272 | } | |
2273 | ||
2274 | /* remove it from the orphan directory */ | |
2275 | status = ocfs2_delete_entry(handle, orphan_dir_inode, target_de, | |
2276 | target_de_bh); | |
2277 | if (status < 0) { | |
2278 | mlog_errno(status); | |
2279 | goto leave; | |
2280 | } | |
2281 | ||
2282 | status = ocfs2_journal_access(handle,orphan_dir_inode, orphan_dir_bh, | |
2283 | OCFS2_JOURNAL_ACCESS_WRITE); | |
2284 | if (status < 0) { | |
2285 | mlog_errno(status); | |
2286 | goto leave; | |
2287 | } | |
2288 | ||
2289 | /* do the i_nlink dance! :) */ | |
2290 | orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; | |
2291 | if (S_ISDIR(inode->i_mode)) | |
2292 | le16_add_cpu(&orphan_fe->i_links_count, -1); | |
2293 | orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count); | |
2294 | ||
2295 | status = ocfs2_journal_dirty(handle, orphan_dir_bh); | |
2296 | if (status < 0) { | |
2297 | mlog_errno(status); | |
2298 | goto leave; | |
2299 | } | |
2300 | ||
2301 | leave: | |
2302 | if (target_de_bh) | |
2303 | brelse(target_de_bh); | |
2304 | ||
2305 | mlog_exit(status); | |
2306 | return status; | |
2307 | } | |
2308 | ||
2309 | struct inode_operations ocfs2_dir_iops = { | |
2310 | .create = ocfs2_create, | |
2311 | .lookup = ocfs2_lookup, | |
2312 | .link = ocfs2_link, | |
2313 | .unlink = ocfs2_unlink, | |
2314 | .rmdir = ocfs2_unlink, | |
2315 | .symlink = ocfs2_symlink, | |
2316 | .mkdir = ocfs2_mkdir, | |
2317 | .mknod = ocfs2_mknod, | |
2318 | .rename = ocfs2_rename, | |
2319 | .setattr = ocfs2_setattr, | |
2320 | .getattr = ocfs2_getattr, | |
d38eb8db | 2321 | .permission = ocfs2_permission, |
ccd979bd | 2322 | }; |