]>
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 | ||
ccd979bd MF |
67 | static int ocfs2_mknod_locked(struct ocfs2_super *osb, |
68 | struct inode *dir, | |
69 | struct dentry *dentry, int mode, | |
70 | dev_t dev, | |
71 | struct buffer_head **new_fe_bh, | |
72 | struct buffer_head *parent_fe_bh, | |
1fabe148 | 73 | handle_t *handle, |
ccd979bd MF |
74 | struct inode **ret_inode, |
75 | struct ocfs2_alloc_context *inode_ac); | |
76 | ||
ccd979bd | 77 | static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, |
5098c27b | 78 | struct inode **ret_orphan_dir, |
ccd979bd MF |
79 | struct inode *inode, |
80 | char *name, | |
81 | struct buffer_head **de_bh); | |
82 | ||
83 | static int ocfs2_orphan_add(struct ocfs2_super *osb, | |
1fabe148 | 84 | handle_t *handle, |
ccd979bd MF |
85 | struct inode *inode, |
86 | struct ocfs2_dinode *fe, | |
87 | char *name, | |
5098c27b MF |
88 | struct buffer_head *de_bh, |
89 | struct inode *orphan_dir_inode); | |
ccd979bd MF |
90 | |
91 | static int ocfs2_create_symlink_data(struct ocfs2_super *osb, | |
1fabe148 | 92 | handle_t *handle, |
ccd979bd MF |
93 | struct inode *inode, |
94 | const char *symname); | |
95 | ||
ccd979bd MF |
96 | /* An orphan dir name is an 8 byte value, printed as a hex string */ |
97 | #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64))) | |
98 | ||
99 | static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry, | |
100 | struct nameidata *nd) | |
101 | { | |
102 | int status; | |
103 | u64 blkno; | |
ccd979bd MF |
104 | struct inode *inode = NULL; |
105 | struct dentry *ret; | |
ccd979bd MF |
106 | struct ocfs2_inode_info *oi; |
107 | ||
108 | mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry, | |
109 | dentry->d_name.len, dentry->d_name.name); | |
110 | ||
111 | if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) { | |
112 | ret = ERR_PTR(-ENAMETOOLONG); | |
113 | goto bail; | |
114 | } | |
115 | ||
b0697053 MF |
116 | mlog(0, "find name %.*s in directory %llu\n", dentry->d_name.len, |
117 | dentry->d_name.name, (unsigned long long)OCFS2_I(dir)->ip_blkno); | |
ccd979bd | 118 | |
4bcec184 | 119 | status = ocfs2_meta_lock(dir, NULL, 0); |
ccd979bd MF |
120 | if (status < 0) { |
121 | if (status != -ENOENT) | |
122 | mlog_errno(status); | |
123 | ret = ERR_PTR(status); | |
124 | goto bail; | |
125 | } | |
126 | ||
be94d117 MF |
127 | status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name, |
128 | dentry->d_name.len, &blkno); | |
ccd979bd MF |
129 | if (status < 0) |
130 | goto bail_add; | |
131 | ||
24c19ef4 | 132 | inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0); |
ccd979bd | 133 | if (IS_ERR(inode)) { |
ccd979bd MF |
134 | ret = ERR_PTR(-EACCES); |
135 | goto bail_unlock; | |
136 | } | |
137 | ||
138 | oi = OCFS2_I(inode); | |
139 | /* Clear any orphaned state... If we were able to look up the | |
140 | * inode from a directory, it certainly can't be orphaned. We | |
141 | * might have the bad state from a node which intended to | |
142 | * orphan this inode but crashed before it could commit the | |
143 | * unlink. */ | |
144 | spin_lock(&oi->ip_lock); | |
145 | oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED; | |
ccd979bd MF |
146 | spin_unlock(&oi->ip_lock); |
147 | ||
148 | bail_add: | |
ccd979bd MF |
149 | dentry->d_op = &ocfs2_dentry_ops; |
150 | ret = d_splice_alias(inode, dentry); | |
151 | ||
379dfe9d MF |
152 | if (inode) { |
153 | /* | |
154 | * If d_splice_alias() finds a DCACHE_DISCONNECTED | |
155 | * dentry, it will d_move() it on top of ourse. The | |
156 | * return value will indicate this however, so in | |
157 | * those cases, we switch them around for the locking | |
158 | * code. | |
159 | * | |
160 | * NOTE: This dentry already has ->d_op set from | |
161 | * ocfs2_get_parent() and ocfs2_get_dentry() | |
162 | */ | |
163 | if (ret) | |
164 | dentry = ret; | |
165 | ||
166 | status = ocfs2_dentry_attach_lock(dentry, inode, | |
0027dd5b | 167 | OCFS2_I(dir)->ip_blkno); |
379dfe9d MF |
168 | if (status) { |
169 | mlog_errno(status); | |
170 | ret = ERR_PTR(status); | |
171 | goto bail_unlock; | |
172 | } | |
173 | } | |
174 | ||
ccd979bd MF |
175 | bail_unlock: |
176 | /* Don't drop the cluster lock until *after* the d_add -- | |
177 | * unlink on another node will message us to remove that | |
178 | * dentry under this lock so otherwise we can race this with | |
179 | * the vote thread and have a stale dentry. */ | |
180 | ocfs2_meta_unlock(dir, 0); | |
181 | ||
182 | bail: | |
ccd979bd MF |
183 | |
184 | mlog_exit_ptr(ret); | |
185 | ||
186 | return ret; | |
187 | } | |
188 | ||
ccd979bd MF |
189 | static int ocfs2_mknod(struct inode *dir, |
190 | struct dentry *dentry, | |
191 | int mode, | |
192 | dev_t dev) | |
193 | { | |
194 | int status = 0; | |
195 | struct buffer_head *parent_fe_bh = NULL; | |
1fabe148 | 196 | handle_t *handle = NULL; |
ccd979bd MF |
197 | struct ocfs2_super *osb; |
198 | struct ocfs2_dinode *dirfe; | |
199 | struct buffer_head *new_fe_bh = NULL; | |
200 | struct buffer_head *de_bh = NULL; | |
201 | struct inode *inode = NULL; | |
202 | struct ocfs2_alloc_context *inode_ac = NULL; | |
203 | struct ocfs2_alloc_context *data_ac = NULL; | |
204 | ||
205 | mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode, | |
206 | (unsigned long)dev, dentry->d_name.len, | |
207 | dentry->d_name.name); | |
208 | ||
209 | /* get our super block */ | |
210 | osb = OCFS2_SB(dir->i_sb); | |
211 | ||
4bcec184 | 212 | status = ocfs2_meta_lock(dir, &parent_fe_bh, 1); |
e3a82138 MF |
213 | if (status < 0) { |
214 | if (status != -ENOENT) | |
215 | mlog_errno(status); | |
216 | return status; | |
217 | } | |
218 | ||
a663e305 MF |
219 | if (S_ISDIR(mode) && (dir->i_nlink >= OCFS2_LINK_MAX)) { |
220 | status = -EMLINK; | |
221 | goto leave; | |
222 | } | |
223 | ||
ccd979bd MF |
224 | dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; |
225 | if (!dirfe->i_links_count) { | |
226 | /* can't make a file in a deleted directory. */ | |
227 | status = -ENOENT; | |
228 | goto leave; | |
229 | } | |
230 | ||
231 | status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, | |
232 | dentry->d_name.len); | |
233 | if (status) | |
234 | goto leave; | |
235 | ||
236 | /* get a spot inside the dir. */ | |
237 | status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, | |
238 | dentry->d_name.name, | |
239 | dentry->d_name.len, &de_bh); | |
240 | if (status < 0) { | |
241 | mlog_errno(status); | |
242 | goto leave; | |
243 | } | |
244 | ||
245 | /* reserve an inode spot */ | |
da5cbf2f | 246 | status = ocfs2_reserve_new_inode(osb, &inode_ac); |
ccd979bd MF |
247 | if (status < 0) { |
248 | if (status != -ENOSPC) | |
249 | mlog_errno(status); | |
250 | goto leave; | |
251 | } | |
252 | ||
5b6a3a2b MF |
253 | /* Reserve a cluster if creating an extent based directory. */ |
254 | if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) { | |
da5cbf2f | 255 | status = ocfs2_reserve_clusters(osb, 1, &data_ac); |
ccd979bd MF |
256 | if (status < 0) { |
257 | if (status != -ENOSPC) | |
258 | mlog_errno(status); | |
259 | goto leave; | |
260 | } | |
261 | } | |
262 | ||
65eff9cc | 263 | handle = ocfs2_start_trans(osb, OCFS2_MKNOD_CREDITS); |
ccd979bd MF |
264 | if (IS_ERR(handle)) { |
265 | status = PTR_ERR(handle); | |
266 | handle = NULL; | |
267 | mlog_errno(status); | |
268 | goto leave; | |
269 | } | |
270 | ||
271 | /* do the real work now. */ | |
272 | status = ocfs2_mknod_locked(osb, dir, dentry, mode, dev, | |
273 | &new_fe_bh, parent_fe_bh, handle, | |
274 | &inode, inode_ac); | |
275 | if (status < 0) { | |
276 | mlog_errno(status); | |
277 | goto leave; | |
278 | } | |
279 | ||
280 | if (S_ISDIR(mode)) { | |
281 | status = ocfs2_fill_new_dir(osb, handle, dir, inode, | |
282 | new_fe_bh, data_ac); | |
283 | if (status < 0) { | |
284 | mlog_errno(status); | |
285 | goto leave; | |
286 | } | |
287 | ||
288 | status = ocfs2_journal_access(handle, dir, parent_fe_bh, | |
289 | OCFS2_JOURNAL_ACCESS_WRITE); | |
290 | if (status < 0) { | |
291 | mlog_errno(status); | |
292 | goto leave; | |
293 | } | |
294 | le16_add_cpu(&dirfe->i_links_count, 1); | |
295 | status = ocfs2_journal_dirty(handle, parent_fe_bh); | |
296 | if (status < 0) { | |
297 | mlog_errno(status); | |
298 | goto leave; | |
299 | } | |
d8c76e6f | 300 | inc_nlink(dir); |
ccd979bd MF |
301 | } |
302 | ||
303 | status = ocfs2_add_entry(handle, dentry, inode, | |
304 | OCFS2_I(inode)->ip_blkno, parent_fe_bh, | |
305 | de_bh); | |
306 | if (status < 0) { | |
307 | mlog_errno(status); | |
308 | goto leave; | |
309 | } | |
310 | ||
379dfe9d | 311 | status = ocfs2_dentry_attach_lock(dentry, inode, |
0027dd5b | 312 | OCFS2_I(dir)->ip_blkno); |
379dfe9d MF |
313 | if (status) { |
314 | mlog_errno(status); | |
315 | goto leave; | |
316 | } | |
317 | ||
ccd979bd MF |
318 | insert_inode_hash(inode); |
319 | dentry->d_op = &ocfs2_dentry_ops; | |
320 | d_instantiate(dentry, inode); | |
321 | status = 0; | |
322 | leave: | |
323 | if (handle) | |
02dc1af4 | 324 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 325 | |
e3a82138 MF |
326 | ocfs2_meta_unlock(dir, 1); |
327 | ||
ccd979bd MF |
328 | if (status == -ENOSPC) |
329 | mlog(0, "Disk is full\n"); | |
330 | ||
331 | if (new_fe_bh) | |
332 | brelse(new_fe_bh); | |
333 | ||
334 | if (de_bh) | |
335 | brelse(de_bh); | |
336 | ||
337 | if (parent_fe_bh) | |
338 | brelse(parent_fe_bh); | |
339 | ||
340 | if ((status < 0) && inode) | |
341 | iput(inode); | |
342 | ||
343 | if (inode_ac) | |
344 | ocfs2_free_alloc_context(inode_ac); | |
345 | ||
346 | if (data_ac) | |
347 | ocfs2_free_alloc_context(data_ac); | |
348 | ||
349 | mlog_exit(status); | |
350 | ||
351 | return status; | |
352 | } | |
353 | ||
354 | static int ocfs2_mknod_locked(struct ocfs2_super *osb, | |
355 | struct inode *dir, | |
356 | struct dentry *dentry, int mode, | |
357 | dev_t dev, | |
358 | struct buffer_head **new_fe_bh, | |
359 | struct buffer_head *parent_fe_bh, | |
1fabe148 | 360 | handle_t *handle, |
ccd979bd MF |
361 | struct inode **ret_inode, |
362 | struct ocfs2_alloc_context *inode_ac) | |
363 | { | |
364 | int status = 0; | |
365 | struct ocfs2_dinode *fe = NULL; | |
366 | struct ocfs2_extent_list *fel; | |
367 | u64 fe_blkno = 0; | |
368 | u16 suballoc_bit; | |
369 | struct inode *inode = NULL; | |
370 | ||
371 | mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode, | |
372 | (unsigned long)dev, dentry->d_name.len, | |
373 | dentry->d_name.name); | |
374 | ||
375 | *new_fe_bh = NULL; | |
376 | *ret_inode = NULL; | |
377 | ||
378 | status = ocfs2_claim_new_inode(osb, handle, inode_ac, &suballoc_bit, | |
379 | &fe_blkno); | |
380 | if (status < 0) { | |
381 | mlog_errno(status); | |
382 | goto leave; | |
383 | } | |
384 | ||
385 | inode = new_inode(dir->i_sb); | |
386 | if (IS_ERR(inode)) { | |
387 | status = PTR_ERR(inode); | |
388 | mlog(ML_ERROR, "new_inode failed!\n"); | |
389 | goto leave; | |
390 | } | |
391 | ||
392 | /* populate as many fields early on as possible - many of | |
393 | * these are used by the support functions here and in | |
394 | * callers. */ | |
395 | inode->i_ino = ino_from_blkno(osb->sb, fe_blkno); | |
396 | OCFS2_I(inode)->ip_blkno = fe_blkno; | |
397 | if (S_ISDIR(mode)) | |
398 | inode->i_nlink = 2; | |
399 | else | |
400 | inode->i_nlink = 1; | |
401 | inode->i_mode = mode; | |
402 | spin_lock(&osb->osb_lock); | |
403 | inode->i_generation = osb->s_next_generation++; | |
404 | spin_unlock(&osb->osb_lock); | |
405 | ||
406 | *new_fe_bh = sb_getblk(osb->sb, fe_blkno); | |
407 | if (!*new_fe_bh) { | |
408 | status = -EIO; | |
409 | mlog_errno(status); | |
410 | goto leave; | |
411 | } | |
412 | ocfs2_set_new_buffer_uptodate(inode, *new_fe_bh); | |
413 | ||
414 | status = ocfs2_journal_access(handle, inode, *new_fe_bh, | |
415 | OCFS2_JOURNAL_ACCESS_CREATE); | |
416 | if (status < 0) { | |
417 | mlog_errno(status); | |
418 | goto leave; | |
419 | } | |
420 | ||
421 | fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data; | |
422 | memset(fe, 0, osb->sb->s_blocksize); | |
423 | ||
424 | fe->i_generation = cpu_to_le32(inode->i_generation); | |
425 | fe->i_fs_generation = cpu_to_le32(osb->fs_generation); | |
426 | fe->i_blkno = cpu_to_le64(fe_blkno); | |
427 | fe->i_suballoc_bit = cpu_to_le16(suballoc_bit); | |
428 | fe->i_suballoc_slot = cpu_to_le16(osb->slot_num); | |
429 | fe->i_uid = cpu_to_le32(current->fsuid); | |
430 | if (dir->i_mode & S_ISGID) { | |
431 | fe->i_gid = cpu_to_le32(dir->i_gid); | |
432 | if (S_ISDIR(mode)) | |
433 | mode |= S_ISGID; | |
434 | } else | |
435 | fe->i_gid = cpu_to_le32(current->fsgid); | |
436 | fe->i_mode = cpu_to_le16(mode); | |
437 | if (S_ISCHR(mode) || S_ISBLK(mode)) | |
438 | fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev)); | |
439 | ||
440 | fe->i_links_count = cpu_to_le16(inode->i_nlink); | |
441 | ||
442 | fe->i_last_eb_blk = 0; | |
443 | strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE); | |
444 | le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL); | |
445 | fe->i_atime = fe->i_ctime = fe->i_mtime = | |
446 | cpu_to_le64(CURRENT_TIME.tv_sec); | |
447 | fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = | |
448 | cpu_to_le32(CURRENT_TIME.tv_nsec); | |
449 | fe->i_dtime = 0; | |
450 | ||
5b6a3a2b MF |
451 | /* |
452 | * If supported, directories start with inline data. | |
453 | */ | |
454 | if (S_ISDIR(mode) && ocfs2_supports_inline_data(osb)) { | |
455 | u16 feat = le16_to_cpu(fe->i_dyn_features); | |
456 | ||
457 | fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL); | |
458 | ||
459 | fe->id2.i_data.id_count = cpu_to_le16(ocfs2_max_inline_data(osb->sb)); | |
460 | } else { | |
461 | fel = &fe->id2.i_list; | |
462 | fel->l_tree_depth = 0; | |
463 | fel->l_next_free_rec = 0; | |
464 | fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb)); | |
465 | } | |
ccd979bd MF |
466 | |
467 | status = ocfs2_journal_dirty(handle, *new_fe_bh); | |
468 | if (status < 0) { | |
469 | mlog_errno(status); | |
470 | goto leave; | |
471 | } | |
472 | ||
473 | if (ocfs2_populate_inode(inode, fe, 1) < 0) { | |
474 | mlog(ML_ERROR, "populate inode failed! bh->b_blocknr=%llu, " | |
b0697053 | 475 | "i_blkno=%llu, i_ino=%lu\n", |
1ca1a111 MF |
476 | (unsigned long long)(*new_fe_bh)->b_blocknr, |
477 | (unsigned long long)le64_to_cpu(fe->i_blkno), | |
478 | inode->i_ino); | |
ccd979bd MF |
479 | BUG(); |
480 | } | |
481 | ||
482 | ocfs2_inode_set_new(osb, inode); | |
c271c5c2 SM |
483 | if (!ocfs2_mount_local(osb)) { |
484 | status = ocfs2_create_new_inode_locks(inode); | |
485 | if (status < 0) | |
486 | mlog_errno(status); | |
487 | } | |
ccd979bd MF |
488 | |
489 | status = 0; /* error in ocfs2_create_new_inode_locks is not | |
490 | * critical */ | |
491 | ||
492 | *ret_inode = inode; | |
493 | leave: | |
494 | if (status < 0) { | |
495 | if (*new_fe_bh) { | |
496 | brelse(*new_fe_bh); | |
497 | *new_fe_bh = NULL; | |
498 | } | |
499 | if (inode) | |
500 | iput(inode); | |
501 | } | |
502 | ||
503 | mlog_exit(status); | |
504 | return status; | |
505 | } | |
506 | ||
507 | static int ocfs2_mkdir(struct inode *dir, | |
508 | struct dentry *dentry, | |
509 | int mode) | |
510 | { | |
511 | int ret; | |
512 | ||
513 | mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode, | |
514 | dentry->d_name.len, dentry->d_name.name); | |
515 | ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0); | |
516 | mlog_exit(ret); | |
517 | ||
518 | return ret; | |
519 | } | |
520 | ||
521 | static int ocfs2_create(struct inode *dir, | |
522 | struct dentry *dentry, | |
523 | int mode, | |
524 | struct nameidata *nd) | |
525 | { | |
526 | int ret; | |
527 | ||
528 | mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode, | |
529 | dentry->d_name.len, dentry->d_name.name); | |
530 | ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0); | |
531 | mlog_exit(ret); | |
532 | ||
533 | return ret; | |
534 | } | |
535 | ||
536 | static int ocfs2_link(struct dentry *old_dentry, | |
537 | struct inode *dir, | |
538 | struct dentry *dentry) | |
539 | { | |
1fabe148 | 540 | handle_t *handle; |
ccd979bd MF |
541 | struct inode *inode = old_dentry->d_inode; |
542 | int err; | |
543 | struct buffer_head *fe_bh = NULL; | |
544 | struct buffer_head *parent_fe_bh = NULL; | |
545 | struct buffer_head *de_bh = NULL; | |
546 | struct ocfs2_dinode *fe = NULL; | |
547 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
548 | ||
549 | mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino, | |
550 | old_dentry->d_name.len, old_dentry->d_name.name, | |
551 | dentry->d_name.len, dentry->d_name.name); | |
552 | ||
123a9643 MF |
553 | if (S_ISDIR(inode->i_mode)) |
554 | return -EPERM; | |
ccd979bd | 555 | |
4bcec184 | 556 | err = ocfs2_meta_lock(dir, &parent_fe_bh, 1); |
ccd979bd MF |
557 | if (err < 0) { |
558 | if (err != -ENOENT) | |
559 | mlog_errno(err); | |
123a9643 | 560 | return err; |
ccd979bd MF |
561 | } |
562 | ||
0f62de2c TY |
563 | if (!dir->i_nlink) { |
564 | err = -ENOENT; | |
123a9643 | 565 | goto out; |
0f62de2c TY |
566 | } |
567 | ||
ccd979bd MF |
568 | err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, |
569 | dentry->d_name.len); | |
570 | if (err) | |
123a9643 | 571 | goto out; |
ccd979bd MF |
572 | |
573 | err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, | |
574 | dentry->d_name.name, | |
575 | dentry->d_name.len, &de_bh); | |
576 | if (err < 0) { | |
577 | mlog_errno(err); | |
123a9643 | 578 | goto out; |
ccd979bd MF |
579 | } |
580 | ||
4bcec184 | 581 | err = ocfs2_meta_lock(inode, &fe_bh, 1); |
ccd979bd MF |
582 | if (err < 0) { |
583 | if (err != -ENOENT) | |
584 | mlog_errno(err); | |
123a9643 | 585 | goto out; |
ccd979bd MF |
586 | } |
587 | ||
588 | fe = (struct ocfs2_dinode *) fe_bh->b_data; | |
589 | if (le16_to_cpu(fe->i_links_count) >= OCFS2_LINK_MAX) { | |
590 | err = -EMLINK; | |
123a9643 | 591 | goto out_unlock_inode; |
ccd979bd MF |
592 | } |
593 | ||
65eff9cc | 594 | handle = ocfs2_start_trans(osb, OCFS2_LINK_CREDITS); |
ccd979bd MF |
595 | if (IS_ERR(handle)) { |
596 | err = PTR_ERR(handle); | |
597 | handle = NULL; | |
598 | mlog_errno(err); | |
123a9643 | 599 | goto out_unlock_inode; |
ccd979bd MF |
600 | } |
601 | ||
602 | err = ocfs2_journal_access(handle, inode, fe_bh, | |
603 | OCFS2_JOURNAL_ACCESS_WRITE); | |
604 | if (err < 0) { | |
605 | mlog_errno(err); | |
123a9643 | 606 | goto out_commit; |
ccd979bd MF |
607 | } |
608 | ||
d8c76e6f | 609 | inc_nlink(inode); |
ccd979bd MF |
610 | inode->i_ctime = CURRENT_TIME; |
611 | fe->i_links_count = cpu_to_le16(inode->i_nlink); | |
612 | fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
613 | fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
614 | ||
615 | err = ocfs2_journal_dirty(handle, fe_bh); | |
616 | if (err < 0) { | |
617 | le16_add_cpu(&fe->i_links_count, -1); | |
9a53c3a7 | 618 | drop_nlink(inode); |
ccd979bd | 619 | mlog_errno(err); |
123a9643 | 620 | goto out_commit; |
ccd979bd MF |
621 | } |
622 | ||
623 | err = ocfs2_add_entry(handle, dentry, inode, | |
624 | OCFS2_I(inode)->ip_blkno, | |
625 | parent_fe_bh, de_bh); | |
626 | if (err) { | |
627 | le16_add_cpu(&fe->i_links_count, -1); | |
9a53c3a7 | 628 | drop_nlink(inode); |
ccd979bd | 629 | mlog_errno(err); |
123a9643 | 630 | goto out_commit; |
ccd979bd MF |
631 | } |
632 | ||
0027dd5b | 633 | err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); |
379dfe9d MF |
634 | if (err) { |
635 | mlog_errno(err); | |
123a9643 | 636 | goto out_commit; |
379dfe9d MF |
637 | } |
638 | ||
ccd979bd MF |
639 | atomic_inc(&inode->i_count); |
640 | dentry->d_op = &ocfs2_dentry_ops; | |
641 | d_instantiate(dentry, inode); | |
123a9643 MF |
642 | |
643 | out_commit: | |
02dc1af4 | 644 | ocfs2_commit_trans(osb, handle); |
123a9643 MF |
645 | out_unlock_inode: |
646 | ocfs2_meta_unlock(inode, 1); | |
647 | ||
648 | out: | |
649 | ocfs2_meta_unlock(dir, 1); | |
650 | ||
ccd979bd MF |
651 | if (de_bh) |
652 | brelse(de_bh); | |
653 | if (fe_bh) | |
654 | brelse(fe_bh); | |
655 | if (parent_fe_bh) | |
656 | brelse(parent_fe_bh); | |
657 | ||
658 | mlog_exit(err); | |
659 | ||
660 | return err; | |
661 | } | |
662 | ||
379dfe9d MF |
663 | /* |
664 | * Takes and drops an exclusive lock on the given dentry. This will | |
665 | * force other nodes to drop it. | |
666 | */ | |
667 | static int ocfs2_remote_dentry_delete(struct dentry *dentry) | |
668 | { | |
669 | int ret; | |
670 | ||
671 | ret = ocfs2_dentry_lock(dentry, 1); | |
672 | if (ret) | |
673 | mlog_errno(ret); | |
674 | else | |
675 | ocfs2_dentry_unlock(dentry, 1); | |
676 | ||
677 | return ret; | |
678 | } | |
679 | ||
17ff7856 MF |
680 | static inline int inode_is_unlinkable(struct inode *inode) |
681 | { | |
682 | if (S_ISDIR(inode->i_mode)) { | |
683 | if (inode->i_nlink == 2) | |
684 | return 1; | |
685 | return 0; | |
686 | } | |
687 | ||
688 | if (inode->i_nlink == 1) | |
689 | return 1; | |
690 | return 0; | |
691 | } | |
692 | ||
ccd979bd MF |
693 | static int ocfs2_unlink(struct inode *dir, |
694 | struct dentry *dentry) | |
695 | { | |
696 | int status; | |
30a4f5e8 | 697 | int child_locked = 0; |
ccd979bd | 698 | struct inode *inode = dentry->d_inode; |
5098c27b | 699 | struct inode *orphan_dir = NULL; |
ccd979bd MF |
700 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); |
701 | u64 blkno; | |
702 | struct ocfs2_dinode *fe = NULL; | |
703 | struct buffer_head *fe_bh = NULL; | |
704 | struct buffer_head *parent_node_bh = NULL; | |
1fabe148 | 705 | handle_t *handle = NULL; |
ccd979bd MF |
706 | struct ocfs2_dir_entry *dirent = NULL; |
707 | struct buffer_head *dirent_bh = NULL; | |
708 | char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; | |
709 | struct buffer_head *orphan_entry_bh = NULL; | |
710 | ||
711 | mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry, | |
712 | dentry->d_name.len, dentry->d_name.name); | |
713 | ||
714 | BUG_ON(dentry->d_parent->d_inode != dir); | |
715 | ||
b0697053 | 716 | mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno); |
ccd979bd MF |
717 | |
718 | if (inode == osb->root_inode) { | |
719 | mlog(0, "Cannot delete the root directory\n"); | |
30a4f5e8 | 720 | return -EPERM; |
ccd979bd MF |
721 | } |
722 | ||
4bcec184 | 723 | status = ocfs2_meta_lock(dir, &parent_node_bh, 1); |
ccd979bd MF |
724 | if (status < 0) { |
725 | if (status != -ENOENT) | |
726 | mlog_errno(status); | |
30a4f5e8 | 727 | return status; |
ccd979bd MF |
728 | } |
729 | ||
730 | status = ocfs2_find_files_on_disk(dentry->d_name.name, | |
731 | dentry->d_name.len, &blkno, | |
732 | dir, &dirent_bh, &dirent); | |
733 | if (status < 0) { | |
734 | if (status != -ENOENT) | |
735 | mlog_errno(status); | |
736 | goto leave; | |
737 | } | |
738 | ||
739 | if (OCFS2_I(inode)->ip_blkno != blkno) { | |
740 | status = -ENOENT; | |
741 | ||
b0697053 MF |
742 | mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n", |
743 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
744 | (unsigned long long)blkno, OCFS2_I(inode)->ip_flags); | |
ccd979bd MF |
745 | goto leave; |
746 | } | |
747 | ||
4bcec184 | 748 | status = ocfs2_meta_lock(inode, &fe_bh, 1); |
ccd979bd MF |
749 | if (status < 0) { |
750 | if (status != -ENOENT) | |
751 | mlog_errno(status); | |
752 | goto leave; | |
753 | } | |
30a4f5e8 | 754 | child_locked = 1; |
ccd979bd MF |
755 | |
756 | if (S_ISDIR(inode->i_mode)) { | |
757 | if (!ocfs2_empty_dir(inode)) { | |
758 | status = -ENOTEMPTY; | |
759 | goto leave; | |
760 | } else if (inode->i_nlink != 2) { | |
761 | status = -ENOTEMPTY; | |
762 | goto leave; | |
763 | } | |
764 | } | |
765 | ||
379dfe9d | 766 | status = ocfs2_remote_dentry_delete(dentry); |
ccd979bd MF |
767 | if (status < 0) { |
768 | /* This vote should succeed under all normal | |
769 | * circumstances. */ | |
770 | mlog_errno(status); | |
771 | goto leave; | |
772 | } | |
773 | ||
17ff7856 | 774 | if (inode_is_unlinkable(inode)) { |
5098c27b | 775 | status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, inode, |
ccd979bd MF |
776 | orphan_name, |
777 | &orphan_entry_bh); | |
778 | if (status < 0) { | |
779 | mlog_errno(status); | |
780 | goto leave; | |
781 | } | |
782 | } | |
783 | ||
65eff9cc | 784 | handle = ocfs2_start_trans(osb, OCFS2_UNLINK_CREDITS); |
ccd979bd MF |
785 | if (IS_ERR(handle)) { |
786 | status = PTR_ERR(handle); | |
787 | handle = NULL; | |
788 | mlog_errno(status); | |
789 | goto leave; | |
790 | } | |
791 | ||
792 | status = ocfs2_journal_access(handle, inode, fe_bh, | |
793 | OCFS2_JOURNAL_ACCESS_WRITE); | |
794 | if (status < 0) { | |
795 | mlog_errno(status); | |
796 | goto leave; | |
797 | } | |
798 | ||
799 | fe = (struct ocfs2_dinode *) fe_bh->b_data; | |
800 | ||
17ff7856 | 801 | if (inode_is_unlinkable(inode)) { |
ccd979bd | 802 | status = ocfs2_orphan_add(osb, handle, inode, fe, orphan_name, |
5098c27b | 803 | orphan_entry_bh, orphan_dir); |
ccd979bd MF |
804 | if (status < 0) { |
805 | mlog_errno(status); | |
806 | goto leave; | |
807 | } | |
808 | } | |
809 | ||
810 | /* delete the name from the parent dir */ | |
811 | status = ocfs2_delete_entry(handle, dir, dirent, dirent_bh); | |
812 | if (status < 0) { | |
813 | mlog_errno(status); | |
814 | goto leave; | |
815 | } | |
816 | ||
17ff7856 MF |
817 | if (S_ISDIR(inode->i_mode)) |
818 | drop_nlink(inode); | |
819 | drop_nlink(inode); | |
ccd979bd | 820 | fe->i_links_count = cpu_to_le16(inode->i_nlink); |
ccd979bd MF |
821 | |
822 | status = ocfs2_journal_dirty(handle, fe_bh); | |
823 | if (status < 0) { | |
824 | mlog_errno(status); | |
825 | goto leave; | |
826 | } | |
827 | ||
592282cf MF |
828 | dir->i_ctime = dir->i_mtime = CURRENT_TIME; |
829 | if (S_ISDIR(inode->i_mode)) | |
17ff7856 | 830 | drop_nlink(dir); |
592282cf MF |
831 | |
832 | status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh); | |
833 | if (status < 0) { | |
834 | mlog_errno(status); | |
835 | if (S_ISDIR(inode->i_mode)) | |
d8c76e6f | 836 | inc_nlink(dir); |
ccd979bd MF |
837 | } |
838 | ||
839 | leave: | |
ccd979bd | 840 | if (handle) |
02dc1af4 | 841 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 842 | |
30a4f5e8 MF |
843 | if (child_locked) |
844 | ocfs2_meta_unlock(inode, 1); | |
845 | ||
846 | ocfs2_meta_unlock(dir, 1); | |
847 | ||
5098c27b MF |
848 | if (orphan_dir) { |
849 | /* This was locked for us in ocfs2_prepare_orphan_dir() */ | |
850 | ocfs2_meta_unlock(orphan_dir, 1); | |
851 | mutex_unlock(&orphan_dir->i_mutex); | |
852 | iput(orphan_dir); | |
853 | } | |
854 | ||
ccd979bd MF |
855 | if (fe_bh) |
856 | brelse(fe_bh); | |
857 | ||
858 | if (dirent_bh) | |
859 | brelse(dirent_bh); | |
860 | ||
861 | if (parent_node_bh) | |
862 | brelse(parent_node_bh); | |
863 | ||
864 | if (orphan_entry_bh) | |
865 | brelse(orphan_entry_bh); | |
866 | ||
867 | mlog_exit(status); | |
868 | ||
869 | return status; | |
870 | } | |
871 | ||
872 | /* | |
873 | * The only place this should be used is rename! | |
874 | * if they have the same id, then the 1st one is the only one locked. | |
875 | */ | |
876 | static int ocfs2_double_lock(struct ocfs2_super *osb, | |
ccd979bd MF |
877 | struct buffer_head **bh1, |
878 | struct inode *inode1, | |
879 | struct buffer_head **bh2, | |
880 | struct inode *inode2) | |
881 | { | |
882 | int status; | |
883 | struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); | |
884 | struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); | |
885 | struct buffer_head **tmpbh; | |
886 | struct inode *tmpinode; | |
887 | ||
b0697053 MF |
888 | mlog_entry("(inode1 = %llu, inode2 = %llu)\n", |
889 | (unsigned long long)oi1->ip_blkno, | |
890 | (unsigned long long)oi2->ip_blkno); | |
ccd979bd | 891 | |
ccd979bd MF |
892 | if (*bh1) |
893 | *bh1 = NULL; | |
894 | if (*bh2) | |
895 | *bh2 = NULL; | |
896 | ||
897 | /* we always want to lock the one with the lower lockid first. */ | |
898 | if (oi1->ip_blkno != oi2->ip_blkno) { | |
899 | if (oi1->ip_blkno < oi2->ip_blkno) { | |
900 | /* switch id1 and id2 around */ | |
901 | mlog(0, "switching them around...\n"); | |
902 | tmpbh = bh2; | |
903 | bh2 = bh1; | |
904 | bh1 = tmpbh; | |
905 | ||
906 | tmpinode = inode2; | |
907 | inode2 = inode1; | |
908 | inode1 = tmpinode; | |
909 | } | |
910 | /* lock id2 */ | |
4bcec184 | 911 | status = ocfs2_meta_lock(inode2, bh2, 1); |
ccd979bd MF |
912 | if (status < 0) { |
913 | if (status != -ENOENT) | |
914 | mlog_errno(status); | |
915 | goto bail; | |
916 | } | |
917 | } | |
8d5596c6 | 918 | |
ccd979bd | 919 | /* lock id1 */ |
4bcec184 | 920 | status = ocfs2_meta_lock(inode1, bh1, 1); |
ccd979bd | 921 | if (status < 0) { |
8d5596c6 MF |
922 | /* |
923 | * An error return must mean that no cluster locks | |
924 | * were held on function exit. | |
925 | */ | |
926 | if (oi1->ip_blkno != oi2->ip_blkno) | |
927 | ocfs2_meta_unlock(inode2, 1); | |
928 | ||
ccd979bd MF |
929 | if (status != -ENOENT) |
930 | mlog_errno(status); | |
ccd979bd | 931 | } |
8d5596c6 | 932 | |
ccd979bd MF |
933 | bail: |
934 | mlog_exit(status); | |
935 | return status; | |
936 | } | |
937 | ||
8d5596c6 MF |
938 | static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2) |
939 | { | |
940 | ocfs2_meta_unlock(inode1, 1); | |
941 | ||
942 | if (inode1 != inode2) | |
943 | ocfs2_meta_unlock(inode2, 1); | |
944 | } | |
945 | ||
ccd979bd MF |
946 | static int ocfs2_rename(struct inode *old_dir, |
947 | struct dentry *old_dentry, | |
948 | struct inode *new_dir, | |
949 | struct dentry *new_dentry) | |
950 | { | |
8d5596c6 MF |
951 | int status = 0, rename_lock = 0, parents_locked = 0; |
952 | int old_child_locked = 0, new_child_locked = 0; | |
ccd979bd MF |
953 | struct inode *old_inode = old_dentry->d_inode; |
954 | struct inode *new_inode = new_dentry->d_inode; | |
5098c27b | 955 | struct inode *orphan_dir = NULL; |
ccd979bd MF |
956 | struct ocfs2_dinode *newfe = NULL; |
957 | char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; | |
958 | struct buffer_head *orphan_entry_bh = NULL; | |
959 | struct buffer_head *newfe_bh = NULL; | |
592282cf | 960 | struct buffer_head *old_inode_bh = NULL; |
ccd979bd MF |
961 | struct buffer_head *insert_entry_bh = NULL; |
962 | struct ocfs2_super *osb = NULL; | |
5b6a3a2b | 963 | u64 newfe_blkno, old_de_ino; |
1fabe148 | 964 | handle_t *handle = NULL; |
ccd979bd MF |
965 | struct buffer_head *old_dir_bh = NULL; |
966 | struct buffer_head *new_dir_bh = NULL; | |
38760e24 MF |
967 | struct ocfs2_dir_entry *old_inode_dot_dot_de = NULL, *old_de = NULL, |
968 | *new_de = NULL; | |
ccd979bd MF |
969 | struct buffer_head *new_de_bh = NULL, *old_de_bh = NULL; // bhs for above |
970 | struct buffer_head *old_inode_de_bh = NULL; // if old_dentry is a dir, | |
971 | // this is the 1st dirent bh | |
592282cf | 972 | nlink_t old_dir_nlink = old_dir->i_nlink; |
480214d7 | 973 | struct ocfs2_dinode *old_di; |
ccd979bd MF |
974 | |
975 | /* At some point it might be nice to break this function up a | |
976 | * bit. */ | |
977 | ||
978 | mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n", | |
979 | old_dir, old_dentry, new_dir, new_dentry, | |
980 | old_dentry->d_name.len, old_dentry->d_name.name, | |
981 | new_dentry->d_name.len, new_dentry->d_name.name); | |
982 | ||
983 | osb = OCFS2_SB(old_dir->i_sb); | |
984 | ||
985 | if (new_inode) { | |
986 | if (!igrab(new_inode)) | |
987 | BUG(); | |
988 | } | |
989 | ||
1b3c3714 | 990 | /* Assume a directory hierarchy thusly: |
ccd979bd MF |
991 | * a/b/c |
992 | * a/d | |
993 | * a,b,c, and d are all directories. | |
994 | * | |
995 | * from cwd of 'a' on both nodes: | |
996 | * node1: mv b/c d | |
997 | * node2: mv d b/c | |
998 | * | |
999 | * And that's why, just like the VFS, we need a file system | |
1000 | * rename lock. */ | |
1001 | if (old_dentry != new_dentry) { | |
1002 | status = ocfs2_rename_lock(osb); | |
1003 | if (status < 0) { | |
1004 | mlog_errno(status); | |
1005 | goto bail; | |
1006 | } | |
1007 | rename_lock = 1; | |
1008 | } | |
1009 | ||
ccd979bd | 1010 | /* if old and new are the same, this'll just do one lock. */ |
8d5596c6 MF |
1011 | status = ocfs2_double_lock(osb, &old_dir_bh, old_dir, |
1012 | &new_dir_bh, new_dir); | |
ccd979bd MF |
1013 | if (status < 0) { |
1014 | mlog_errno(status); | |
1015 | goto bail; | |
1016 | } | |
8d5596c6 | 1017 | parents_locked = 1; |
ccd979bd MF |
1018 | |
1019 | /* make sure both dirs have bhs | |
1020 | * get an extra ref on old_dir_bh if old==new */ | |
1021 | if (!new_dir_bh) { | |
1022 | if (old_dir_bh) { | |
1023 | new_dir_bh = old_dir_bh; | |
1024 | get_bh(new_dir_bh); | |
1025 | } else { | |
1026 | mlog(ML_ERROR, "no old_dir_bh!\n"); | |
1027 | status = -EIO; | |
1028 | goto bail; | |
1029 | } | |
1030 | } | |
1031 | ||
379dfe9d | 1032 | /* |
592282cf MF |
1033 | * Aside from allowing a meta data update, the locking here |
1034 | * also ensures that the vote thread on other nodes won't have | |
1035 | * to concurrently downconvert the inode and the dentry locks. | |
379dfe9d | 1036 | */ |
592282cf | 1037 | status = ocfs2_meta_lock(old_inode, &old_inode_bh, 1); |
379dfe9d MF |
1038 | if (status < 0) { |
1039 | if (status != -ENOENT) | |
ccd979bd | 1040 | mlog_errno(status); |
379dfe9d MF |
1041 | goto bail; |
1042 | } | |
8d5596c6 | 1043 | old_child_locked = 1; |
ccd979bd | 1044 | |
379dfe9d MF |
1045 | status = ocfs2_remote_dentry_delete(old_dentry); |
1046 | if (status < 0) { | |
1047 | mlog_errno(status); | |
1048 | goto bail; | |
1049 | } | |
1050 | ||
1051 | if (S_ISDIR(old_inode->i_mode)) { | |
38760e24 MF |
1052 | u64 old_inode_parent; |
1053 | ||
1054 | status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent, | |
1055 | old_inode, &old_inode_de_bh, | |
1056 | &old_inode_dot_dot_de); | |
1057 | if (status) { | |
1058 | status = -EIO; | |
ccd979bd | 1059 | goto bail; |
38760e24 | 1060 | } |
ccd979bd | 1061 | |
38760e24 MF |
1062 | if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) { |
1063 | status = -EIO; | |
ccd979bd | 1064 | goto bail; |
38760e24 MF |
1065 | } |
1066 | ||
1067 | if (!new_inode && new_dir != old_dir && | |
1068 | new_dir->i_nlink >= OCFS2_LINK_MAX) { | |
1069 | status = -EMLINK; | |
ccd979bd | 1070 | goto bail; |
38760e24 | 1071 | } |
ccd979bd MF |
1072 | } |
1073 | ||
5b6a3a2b MF |
1074 | status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, |
1075 | old_dentry->d_name.len, | |
1076 | &old_de_ino); | |
1077 | if (status) { | |
1078 | status = -ENOENT; | |
ccd979bd | 1079 | goto bail; |
5b6a3a2b | 1080 | } |
ccd979bd MF |
1081 | |
1082 | /* | |
1083 | * Check for inode number is _not_ due to possible IO errors. | |
1084 | * We might rmdir the source, keep it as pwd of some process | |
1085 | * and merrily kill the link to whatever was created under the | |
1086 | * same name. Goodbye sticky bit ;-< | |
1087 | */ | |
5b6a3a2b MF |
1088 | if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) { |
1089 | status = -ENOENT; | |
ccd979bd | 1090 | goto bail; |
5b6a3a2b | 1091 | } |
ccd979bd MF |
1092 | |
1093 | /* check if the target already exists (in which case we need | |
1094 | * to delete it */ | |
1095 | status = ocfs2_find_files_on_disk(new_dentry->d_name.name, | |
1096 | new_dentry->d_name.len, | |
1097 | &newfe_blkno, new_dir, &new_de_bh, | |
1098 | &new_de); | |
1099 | /* The only error we allow here is -ENOENT because the new | |
1100 | * file not existing is perfectly valid. */ | |
1101 | if ((status < 0) && (status != -ENOENT)) { | |
1102 | /* If we cannot find the file specified we should just */ | |
1103 | /* return the error... */ | |
1104 | mlog_errno(status); | |
1105 | goto bail; | |
1106 | } | |
1107 | ||
1108 | if (!new_de && new_inode) | |
1109 | mlog(ML_ERROR, "inode %lu does not exist in it's parent " | |
1110 | "directory!", new_inode->i_ino); | |
1111 | ||
1112 | /* In case we need to overwrite an existing file, we blow it | |
1113 | * away first */ | |
1114 | if (new_de) { | |
1115 | /* VFS didn't think there existed an inode here, but | |
1116 | * someone else in the cluster must have raced our | |
1117 | * rename to create one. Today we error cleanly, in | |
1118 | * the future we should consider calling iget to build | |
1119 | * a new struct inode for this entry. */ | |
1120 | if (!new_inode) { | |
1121 | status = -EACCES; | |
1122 | ||
1123 | mlog(0, "We found an inode for name %.*s but VFS " | |
1124 | "didn't give us one.\n", new_dentry->d_name.len, | |
1125 | new_dentry->d_name.name); | |
1126 | goto bail; | |
1127 | } | |
1128 | ||
1129 | if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { | |
1130 | status = -EACCES; | |
1131 | ||
b0697053 MF |
1132 | mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n", |
1133 | (unsigned long long)OCFS2_I(new_inode)->ip_blkno, | |
1134 | (unsigned long long)newfe_blkno, | |
ccd979bd MF |
1135 | OCFS2_I(new_inode)->ip_flags); |
1136 | goto bail; | |
1137 | } | |
1138 | ||
4bcec184 | 1139 | status = ocfs2_meta_lock(new_inode, &newfe_bh, 1); |
ccd979bd MF |
1140 | if (status < 0) { |
1141 | if (status != -ENOENT) | |
1142 | mlog_errno(status); | |
1143 | goto bail; | |
1144 | } | |
8d5596c6 | 1145 | new_child_locked = 1; |
ccd979bd | 1146 | |
379dfe9d | 1147 | status = ocfs2_remote_dentry_delete(new_dentry); |
ccd979bd MF |
1148 | if (status < 0) { |
1149 | mlog_errno(status); | |
1150 | goto bail; | |
1151 | } | |
1152 | ||
1153 | newfe = (struct ocfs2_dinode *) newfe_bh->b_data; | |
1154 | ||
b0697053 MF |
1155 | mlog(0, "aha rename over existing... new_de=%p new_blkno=%llu " |
1156 | "newfebh=%p bhblocknr=%llu\n", new_de, | |
1157 | (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? | |
ccd979bd MF |
1158 | (unsigned long long)newfe_bh->b_blocknr : 0ULL); |
1159 | ||
1160 | if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { | |
5098c27b | 1161 | status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, |
ccd979bd MF |
1162 | new_inode, |
1163 | orphan_name, | |
1164 | &orphan_entry_bh); | |
1165 | if (status < 0) { | |
1166 | mlog_errno(status); | |
1167 | goto bail; | |
1168 | } | |
1169 | } | |
1170 | } else { | |
1171 | BUG_ON(new_dentry->d_parent->d_inode != new_dir); | |
1172 | ||
1173 | status = ocfs2_check_dir_for_entry(new_dir, | |
1174 | new_dentry->d_name.name, | |
1175 | new_dentry->d_name.len); | |
1176 | if (status) | |
1177 | goto bail; | |
1178 | ||
1179 | status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, | |
1180 | new_dentry->d_name.name, | |
1181 | new_dentry->d_name.len, | |
1182 | &insert_entry_bh); | |
1183 | if (status < 0) { | |
1184 | mlog_errno(status); | |
1185 | goto bail; | |
1186 | } | |
1187 | } | |
1188 | ||
65eff9cc | 1189 | handle = ocfs2_start_trans(osb, OCFS2_RENAME_CREDITS); |
ccd979bd MF |
1190 | if (IS_ERR(handle)) { |
1191 | status = PTR_ERR(handle); | |
1192 | handle = NULL; | |
1193 | mlog_errno(status); | |
1194 | goto bail; | |
1195 | } | |
1196 | ||
1197 | if (new_de) { | |
1198 | if (S_ISDIR(new_inode->i_mode)) { | |
1199 | if (!ocfs2_empty_dir(new_inode) || | |
1200 | new_inode->i_nlink != 2) { | |
1201 | status = -ENOTEMPTY; | |
1202 | goto bail; | |
1203 | } | |
1204 | } | |
1205 | status = ocfs2_journal_access(handle, new_inode, newfe_bh, | |
1206 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1207 | if (status < 0) { | |
1208 | mlog_errno(status); | |
1209 | goto bail; | |
1210 | } | |
1211 | ||
1212 | if (S_ISDIR(new_inode->i_mode) || | |
1213 | (newfe->i_links_count == cpu_to_le16(1))){ | |
1214 | status = ocfs2_orphan_add(osb, handle, new_inode, | |
1215 | newfe, orphan_name, | |
5098c27b | 1216 | orphan_entry_bh, orphan_dir); |
ccd979bd MF |
1217 | if (status < 0) { |
1218 | mlog_errno(status); | |
1219 | goto bail; | |
1220 | } | |
1221 | } | |
1222 | ||
1223 | /* change the dirent to point to the correct inode */ | |
38760e24 MF |
1224 | status = ocfs2_update_entry(new_dir, handle, new_de_bh, |
1225 | new_de, old_inode); | |
ccd979bd MF |
1226 | if (status < 0) { |
1227 | mlog_errno(status); | |
1228 | goto bail; | |
1229 | } | |
ccd979bd | 1230 | new_dir->i_version++; |
ccd979bd MF |
1231 | |
1232 | if (S_ISDIR(new_inode->i_mode)) | |
1233 | newfe->i_links_count = 0; | |
1234 | else | |
1235 | le16_add_cpu(&newfe->i_links_count, -1); | |
1236 | ||
1237 | status = ocfs2_journal_dirty(handle, newfe_bh); | |
1238 | if (status < 0) { | |
1239 | mlog_errno(status); | |
1240 | goto bail; | |
1241 | } | |
1242 | } else { | |
1243 | /* if the name was not found in new_dir, add it now */ | |
1244 | status = ocfs2_add_entry(handle, new_dentry, old_inode, | |
1245 | OCFS2_I(old_inode)->ip_blkno, | |
1246 | new_dir_bh, insert_entry_bh); | |
1247 | } | |
1248 | ||
1249 | old_inode->i_ctime = CURRENT_TIME; | |
1250 | mark_inode_dirty(old_inode); | |
480214d7 SM |
1251 | |
1252 | status = ocfs2_journal_access(handle, old_inode, old_inode_bh, | |
1253 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1254 | if (status >= 0) { | |
1255 | old_di = (struct ocfs2_dinode *) old_inode_bh->b_data; | |
1256 | ||
1257 | old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec); | |
1258 | old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec); | |
1259 | ||
1260 | status = ocfs2_journal_dirty(handle, old_inode_bh); | |
1261 | if (status < 0) | |
1262 | mlog_errno(status); | |
1263 | } else | |
1264 | mlog_errno(status); | |
ccd979bd | 1265 | |
5b6a3a2b MF |
1266 | /* |
1267 | * Now that the name has been added to new_dir, remove the old name. | |
1268 | * | |
1269 | * We don't keep any directory entry context around until now | |
1270 | * because the insert might have changed the type of directory | |
1271 | * we're dealing with. | |
1272 | */ | |
1273 | old_de_bh = ocfs2_find_entry(old_dentry->d_name.name, | |
1274 | old_dentry->d_name.len, | |
1275 | old_dir, &old_de); | |
1276 | if (!old_de_bh) { | |
1277 | status = -EIO; | |
1278 | goto bail; | |
1279 | } | |
1280 | ||
ccd979bd MF |
1281 | status = ocfs2_delete_entry(handle, old_dir, old_de, old_de_bh); |
1282 | if (status < 0) { | |
1283 | mlog_errno(status); | |
1284 | goto bail; | |
1285 | } | |
1286 | ||
1287 | if (new_inode) { | |
1288 | new_inode->i_nlink--; | |
1289 | new_inode->i_ctime = CURRENT_TIME; | |
1290 | } | |
1291 | old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME; | |
1292 | if (old_inode_de_bh) { | |
38760e24 MF |
1293 | status = ocfs2_update_entry(old_inode, handle, old_inode_de_bh, |
1294 | old_inode_dot_dot_de, new_dir); | |
ccd979bd MF |
1295 | old_dir->i_nlink--; |
1296 | if (new_inode) { | |
1297 | new_inode->i_nlink--; | |
1298 | } else { | |
d8c76e6f | 1299 | inc_nlink(new_dir); |
ccd979bd MF |
1300 | mark_inode_dirty(new_dir); |
1301 | } | |
1302 | } | |
1303 | mark_inode_dirty(old_dir); | |
592282cf MF |
1304 | ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh); |
1305 | if (new_inode) { | |
ccd979bd | 1306 | mark_inode_dirty(new_inode); |
592282cf MF |
1307 | ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh); |
1308 | } | |
ccd979bd | 1309 | |
592282cf MF |
1310 | if (old_dir != new_dir) { |
1311 | /* Keep the same times on both directories.*/ | |
1312 | new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime; | |
1313 | ||
1314 | /* | |
1315 | * This will also pick up the i_nlink change from the | |
1316 | * block above. | |
1317 | */ | |
1318 | ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh); | |
1319 | } | |
ccd979bd MF |
1320 | |
1321 | if (old_dir_nlink != old_dir->i_nlink) { | |
1322 | if (!old_dir_bh) { | |
1323 | mlog(ML_ERROR, "need to change nlink for old dir " | |
b0697053 MF |
1324 | "%llu from %d to %d but bh is NULL!\n", |
1325 | (unsigned long long)OCFS2_I(old_dir)->ip_blkno, | |
1326 | (int)old_dir_nlink, old_dir->i_nlink); | |
ccd979bd MF |
1327 | } else { |
1328 | struct ocfs2_dinode *fe; | |
1329 | status = ocfs2_journal_access(handle, old_dir, | |
1330 | old_dir_bh, | |
1331 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1332 | fe = (struct ocfs2_dinode *) old_dir_bh->b_data; | |
1333 | fe->i_links_count = cpu_to_le16(old_dir->i_nlink); | |
1334 | status = ocfs2_journal_dirty(handle, old_dir_bh); | |
1335 | } | |
1336 | } | |
1337 | ||
379dfe9d | 1338 | ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); |
ccd979bd MF |
1339 | status = 0; |
1340 | bail: | |
1341 | if (rename_lock) | |
1342 | ocfs2_rename_unlock(osb); | |
1343 | ||
1344 | if (handle) | |
02dc1af4 | 1345 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 1346 | |
8d5596c6 MF |
1347 | if (parents_locked) |
1348 | ocfs2_double_unlock(old_dir, new_dir); | |
1349 | ||
1350 | if (old_child_locked) | |
1351 | ocfs2_meta_unlock(old_inode, 1); | |
1352 | ||
1353 | if (new_child_locked) | |
1354 | ocfs2_meta_unlock(new_inode, 1); | |
1355 | ||
5098c27b MF |
1356 | if (orphan_dir) { |
1357 | /* This was locked for us in ocfs2_prepare_orphan_dir() */ | |
1358 | ocfs2_meta_unlock(orphan_dir, 1); | |
1359 | mutex_unlock(&orphan_dir->i_mutex); | |
1360 | iput(orphan_dir); | |
1361 | } | |
1362 | ||
ccd979bd MF |
1363 | if (new_inode) |
1364 | sync_mapping_buffers(old_inode->i_mapping); | |
1365 | ||
1366 | if (new_inode) | |
1367 | iput(new_inode); | |
1368 | if (newfe_bh) | |
1369 | brelse(newfe_bh); | |
592282cf MF |
1370 | if (old_inode_bh) |
1371 | brelse(old_inode_bh); | |
ccd979bd MF |
1372 | if (old_dir_bh) |
1373 | brelse(old_dir_bh); | |
1374 | if (new_dir_bh) | |
1375 | brelse(new_dir_bh); | |
1376 | if (new_de_bh) | |
1377 | brelse(new_de_bh); | |
1378 | if (old_de_bh) | |
1379 | brelse(old_de_bh); | |
1380 | if (old_inode_de_bh) | |
1381 | brelse(old_inode_de_bh); | |
1382 | if (orphan_entry_bh) | |
1383 | brelse(orphan_entry_bh); | |
1384 | if (insert_entry_bh) | |
1385 | brelse(insert_entry_bh); | |
1386 | ||
1387 | mlog_exit(status); | |
1388 | ||
1389 | return status; | |
1390 | } | |
1391 | ||
1392 | /* | |
1393 | * we expect i_size = strlen(symname). Copy symname into the file | |
1394 | * data, including the null terminator. | |
1395 | */ | |
1396 | static int ocfs2_create_symlink_data(struct ocfs2_super *osb, | |
1fabe148 | 1397 | handle_t *handle, |
ccd979bd MF |
1398 | struct inode *inode, |
1399 | const char *symname) | |
1400 | { | |
1401 | struct buffer_head **bhs = NULL; | |
1402 | const char *c; | |
1403 | struct super_block *sb = osb->sb; | |
4f902c37 | 1404 | u64 p_blkno, p_blocks; |
ccd979bd MF |
1405 | int virtual, blocks, status, i, bytes_left; |
1406 | ||
1407 | bytes_left = i_size_read(inode) + 1; | |
1408 | /* we can't trust i_blocks because we're actually going to | |
1409 | * write i_size + 1 bytes. */ | |
1410 | blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; | |
1411 | ||
5515eff8 AM |
1412 | mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n", |
1413 | (unsigned long long)inode->i_blocks, | |
1414 | i_size_read(inode), blocks); | |
ccd979bd MF |
1415 | |
1416 | /* Sanity check -- make sure we're going to fit. */ | |
1417 | if (bytes_left > | |
1418 | ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { | |
1419 | status = -EIO; | |
1420 | mlog_errno(status); | |
1421 | goto bail; | |
1422 | } | |
1423 | ||
1424 | bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); | |
1425 | if (!bhs) { | |
1426 | status = -ENOMEM; | |
1427 | mlog_errno(status); | |
1428 | goto bail; | |
1429 | } | |
1430 | ||
49cb8d2d MF |
1431 | status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks, |
1432 | NULL); | |
ccd979bd MF |
1433 | if (status < 0) { |
1434 | mlog_errno(status); | |
1435 | goto bail; | |
1436 | } | |
1437 | ||
1438 | /* links can never be larger than one cluster so we know this | |
1439 | * is all going to be contiguous, but do a sanity check | |
1440 | * anyway. */ | |
1441 | if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { | |
1442 | status = -EIO; | |
1443 | mlog_errno(status); | |
1444 | goto bail; | |
1445 | } | |
1446 | ||
1447 | virtual = 0; | |
1448 | while(bytes_left > 0) { | |
1449 | c = &symname[virtual * sb->s_blocksize]; | |
1450 | ||
1451 | bhs[virtual] = sb_getblk(sb, p_blkno); | |
1452 | if (!bhs[virtual]) { | |
1453 | status = -ENOMEM; | |
1454 | mlog_errno(status); | |
1455 | goto bail; | |
1456 | } | |
1457 | ocfs2_set_new_buffer_uptodate(inode, bhs[virtual]); | |
1458 | ||
1459 | status = ocfs2_journal_access(handle, inode, bhs[virtual], | |
1460 | OCFS2_JOURNAL_ACCESS_CREATE); | |
1461 | if (status < 0) { | |
1462 | mlog_errno(status); | |
1463 | goto bail; | |
1464 | } | |
1465 | ||
1466 | memset(bhs[virtual]->b_data, 0, sb->s_blocksize); | |
1467 | ||
1468 | memcpy(bhs[virtual]->b_data, c, | |
1469 | (bytes_left > sb->s_blocksize) ? sb->s_blocksize : | |
1470 | bytes_left); | |
1471 | ||
1472 | status = ocfs2_journal_dirty(handle, bhs[virtual]); | |
1473 | if (status < 0) { | |
1474 | mlog_errno(status); | |
1475 | goto bail; | |
1476 | } | |
1477 | ||
1478 | virtual++; | |
1479 | p_blkno++; | |
1480 | bytes_left -= sb->s_blocksize; | |
1481 | } | |
1482 | ||
1483 | status = 0; | |
1484 | bail: | |
1485 | ||
1486 | if (bhs) { | |
1487 | for(i = 0; i < blocks; i++) | |
1488 | if (bhs[i]) | |
1489 | brelse(bhs[i]); | |
1490 | kfree(bhs); | |
1491 | } | |
1492 | ||
1493 | mlog_exit(status); | |
1494 | return status; | |
1495 | } | |
1496 | ||
1497 | static int ocfs2_symlink(struct inode *dir, | |
1498 | struct dentry *dentry, | |
1499 | const char *symname) | |
1500 | { | |
1501 | int status, l, credits; | |
1502 | u64 newsize; | |
1503 | struct ocfs2_super *osb = NULL; | |
1504 | struct inode *inode = NULL; | |
1505 | struct super_block *sb; | |
1506 | struct buffer_head *new_fe_bh = NULL; | |
1507 | struct buffer_head *de_bh = NULL; | |
1508 | struct buffer_head *parent_fe_bh = NULL; | |
1509 | struct ocfs2_dinode *fe = NULL; | |
1510 | struct ocfs2_dinode *dirfe; | |
1fabe148 | 1511 | handle_t *handle = NULL; |
ccd979bd MF |
1512 | struct ocfs2_alloc_context *inode_ac = NULL; |
1513 | struct ocfs2_alloc_context *data_ac = NULL; | |
1514 | ||
1515 | mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir, | |
1516 | dentry, symname, dentry->d_name.len, dentry->d_name.name); | |
1517 | ||
1518 | sb = dir->i_sb; | |
1519 | osb = OCFS2_SB(sb); | |
1520 | ||
1521 | l = strlen(symname) + 1; | |
1522 | ||
1523 | credits = ocfs2_calc_symlink_credits(sb); | |
1524 | ||
ccd979bd | 1525 | /* lock the parent directory */ |
4bcec184 | 1526 | status = ocfs2_meta_lock(dir, &parent_fe_bh, 1); |
ccd979bd MF |
1527 | if (status < 0) { |
1528 | if (status != -ENOENT) | |
1529 | mlog_errno(status); | |
6d8fc40e | 1530 | return status; |
ccd979bd MF |
1531 | } |
1532 | ||
1533 | dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; | |
1534 | if (!dirfe->i_links_count) { | |
1535 | /* can't make a file in a deleted directory. */ | |
1536 | status = -ENOENT; | |
1537 | goto bail; | |
1538 | } | |
1539 | ||
1540 | status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, | |
1541 | dentry->d_name.len); | |
1542 | if (status) | |
1543 | goto bail; | |
1544 | ||
1545 | status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, | |
1546 | dentry->d_name.name, | |
1547 | dentry->d_name.len, &de_bh); | |
1548 | if (status < 0) { | |
1549 | mlog_errno(status); | |
1550 | goto bail; | |
1551 | } | |
1552 | ||
da5cbf2f | 1553 | status = ocfs2_reserve_new_inode(osb, &inode_ac); |
ccd979bd MF |
1554 | if (status < 0) { |
1555 | if (status != -ENOSPC) | |
1556 | mlog_errno(status); | |
1557 | goto bail; | |
1558 | } | |
1559 | ||
1560 | /* don't reserve bitmap space for fast symlinks. */ | |
1561 | if (l > ocfs2_fast_symlink_chars(sb)) { | |
da5cbf2f | 1562 | status = ocfs2_reserve_clusters(osb, 1, &data_ac); |
ccd979bd MF |
1563 | if (status < 0) { |
1564 | if (status != -ENOSPC) | |
1565 | mlog_errno(status); | |
1566 | goto bail; | |
1567 | } | |
1568 | } | |
1569 | ||
65eff9cc | 1570 | handle = ocfs2_start_trans(osb, credits); |
ccd979bd MF |
1571 | if (IS_ERR(handle)) { |
1572 | status = PTR_ERR(handle); | |
1573 | handle = NULL; | |
1574 | mlog_errno(status); | |
1575 | goto bail; | |
1576 | } | |
1577 | ||
1578 | status = ocfs2_mknod_locked(osb, dir, dentry, | |
1579 | S_IFLNK | S_IRWXUGO, 0, | |
1580 | &new_fe_bh, parent_fe_bh, handle, | |
1581 | &inode, inode_ac); | |
1582 | if (status < 0) { | |
1583 | mlog_errno(status); | |
1584 | goto bail; | |
1585 | } | |
1586 | ||
1587 | fe = (struct ocfs2_dinode *) new_fe_bh->b_data; | |
1588 | inode->i_rdev = 0; | |
1589 | newsize = l - 1; | |
1590 | if (l > ocfs2_fast_symlink_chars(sb)) { | |
dcd0538f MF |
1591 | u32 offset = 0; |
1592 | ||
ccd979bd | 1593 | inode->i_op = &ocfs2_symlink_inode_operations; |
2ae99a60 | 1594 | status = ocfs2_do_extend_allocation(osb, inode, &offset, 1, 0, |
dcd0538f | 1595 | new_fe_bh, |
ccd979bd MF |
1596 | handle, data_ac, NULL, |
1597 | NULL); | |
1598 | if (status < 0) { | |
1599 | if (status != -ENOSPC && status != -EINTR) { | |
b0697053 MF |
1600 | mlog(ML_ERROR, |
1601 | "Failed to extend file to %llu\n", | |
1602 | (unsigned long long)newsize); | |
ccd979bd MF |
1603 | mlog_errno(status); |
1604 | status = -ENOSPC; | |
1605 | } | |
1606 | goto bail; | |
1607 | } | |
1608 | i_size_write(inode, newsize); | |
8110b073 | 1609 | inode->i_blocks = ocfs2_inode_sector_count(inode); |
ccd979bd MF |
1610 | } else { |
1611 | inode->i_op = &ocfs2_fast_symlink_inode_operations; | |
1612 | memcpy((char *) fe->id2.i_symlink, symname, l); | |
1613 | i_size_write(inode, newsize); | |
1614 | inode->i_blocks = 0; | |
1615 | } | |
1616 | ||
1617 | status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); | |
1618 | if (status < 0) { | |
1619 | mlog_errno(status); | |
1620 | goto bail; | |
1621 | } | |
1622 | ||
1623 | if (!ocfs2_inode_is_fast_symlink(inode)) { | |
1624 | status = ocfs2_create_symlink_data(osb, handle, inode, | |
1625 | symname); | |
1626 | if (status < 0) { | |
1627 | mlog_errno(status); | |
1628 | goto bail; | |
1629 | } | |
1630 | } | |
1631 | ||
1632 | status = ocfs2_add_entry(handle, dentry, inode, | |
1633 | le64_to_cpu(fe->i_blkno), parent_fe_bh, | |
1634 | de_bh); | |
1635 | if (status < 0) { | |
1636 | mlog_errno(status); | |
1637 | goto bail; | |
1638 | } | |
1639 | ||
0027dd5b | 1640 | status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); |
379dfe9d MF |
1641 | if (status) { |
1642 | mlog_errno(status); | |
1643 | goto bail; | |
1644 | } | |
1645 | ||
ccd979bd MF |
1646 | insert_inode_hash(inode); |
1647 | dentry->d_op = &ocfs2_dentry_ops; | |
1648 | d_instantiate(dentry, inode); | |
1649 | bail: | |
1650 | if (handle) | |
02dc1af4 | 1651 | ocfs2_commit_trans(osb, handle); |
6d8fc40e MF |
1652 | |
1653 | ocfs2_meta_unlock(dir, 1); | |
1654 | ||
ccd979bd MF |
1655 | if (new_fe_bh) |
1656 | brelse(new_fe_bh); | |
1657 | if (parent_fe_bh) | |
1658 | brelse(parent_fe_bh); | |
1659 | if (de_bh) | |
1660 | brelse(de_bh); | |
1661 | if (inode_ac) | |
1662 | ocfs2_free_alloc_context(inode_ac); | |
1663 | if (data_ac) | |
1664 | ocfs2_free_alloc_context(data_ac); | |
1665 | if ((status < 0) && inode) | |
1666 | iput(inode); | |
1667 | ||
1668 | mlog_exit(status); | |
1669 | ||
1670 | return status; | |
1671 | } | |
1672 | ||
ccd979bd MF |
1673 | static int ocfs2_blkno_stringify(u64 blkno, char *name) |
1674 | { | |
1675 | int status, namelen; | |
1676 | ||
1677 | mlog_entry_void(); | |
1678 | ||
b0697053 MF |
1679 | namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", |
1680 | (long long)blkno); | |
ccd979bd MF |
1681 | if (namelen <= 0) { |
1682 | if (namelen) | |
1683 | status = namelen; | |
1684 | else | |
1685 | status = -EINVAL; | |
1686 | mlog_errno(status); | |
1687 | goto bail; | |
1688 | } | |
1689 | if (namelen != OCFS2_ORPHAN_NAMELEN) { | |
1690 | status = -EINVAL; | |
1691 | mlog_errno(status); | |
1692 | goto bail; | |
1693 | } | |
1694 | ||
1695 | mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name, | |
1696 | namelen); | |
1697 | ||
1698 | status = 0; | |
1699 | bail: | |
1700 | mlog_exit(status); | |
1701 | return status; | |
1702 | } | |
1703 | ||
1704 | static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, | |
5098c27b | 1705 | struct inode **ret_orphan_dir, |
ccd979bd MF |
1706 | struct inode *inode, |
1707 | char *name, | |
1708 | struct buffer_head **de_bh) | |
1709 | { | |
5098c27b | 1710 | struct inode *orphan_dir_inode; |
ccd979bd MF |
1711 | struct buffer_head *orphan_dir_bh = NULL; |
1712 | int status = 0; | |
1713 | ||
1714 | status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); | |
1715 | if (status < 0) { | |
1716 | mlog_errno(status); | |
5098c27b | 1717 | return status; |
ccd979bd MF |
1718 | } |
1719 | ||
1720 | orphan_dir_inode = ocfs2_get_system_file_inode(osb, | |
1721 | ORPHAN_DIR_SYSTEM_INODE, | |
1722 | osb->slot_num); | |
1723 | if (!orphan_dir_inode) { | |
1724 | status = -ENOENT; | |
1725 | mlog_errno(status); | |
5098c27b | 1726 | return status; |
ccd979bd MF |
1727 | } |
1728 | ||
5098c27b MF |
1729 | mutex_lock(&orphan_dir_inode->i_mutex); |
1730 | ||
4bcec184 | 1731 | status = ocfs2_meta_lock(orphan_dir_inode, &orphan_dir_bh, 1); |
ccd979bd MF |
1732 | if (status < 0) { |
1733 | mlog_errno(status); | |
1734 | goto leave; | |
1735 | } | |
1736 | ||
1737 | status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, | |
1738 | orphan_dir_bh, name, | |
1739 | OCFS2_ORPHAN_NAMELEN, de_bh); | |
1740 | if (status < 0) { | |
5098c27b MF |
1741 | ocfs2_meta_unlock(orphan_dir_inode, 1); |
1742 | ||
ccd979bd MF |
1743 | mlog_errno(status); |
1744 | goto leave; | |
1745 | } | |
1746 | ||
5098c27b MF |
1747 | *ret_orphan_dir = orphan_dir_inode; |
1748 | ||
ccd979bd | 1749 | leave: |
5098c27b MF |
1750 | if (status) { |
1751 | mutex_unlock(&orphan_dir_inode->i_mutex); | |
ccd979bd | 1752 | iput(orphan_dir_inode); |
5098c27b | 1753 | } |
ccd979bd MF |
1754 | |
1755 | if (orphan_dir_bh) | |
1756 | brelse(orphan_dir_bh); | |
1757 | ||
1758 | mlog_exit(status); | |
1759 | return status; | |
1760 | } | |
1761 | ||
1762 | static int ocfs2_orphan_add(struct ocfs2_super *osb, | |
1fabe148 | 1763 | handle_t *handle, |
ccd979bd MF |
1764 | struct inode *inode, |
1765 | struct ocfs2_dinode *fe, | |
1766 | char *name, | |
5098c27b MF |
1767 | struct buffer_head *de_bh, |
1768 | struct inode *orphan_dir_inode) | |
ccd979bd | 1769 | { |
ccd979bd MF |
1770 | struct buffer_head *orphan_dir_bh = NULL; |
1771 | int status = 0; | |
1772 | struct ocfs2_dinode *orphan_fe; | |
1773 | ||
1774 | mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino); | |
1775 | ||
ccd979bd MF |
1776 | status = ocfs2_read_block(osb, |
1777 | OCFS2_I(orphan_dir_inode)->ip_blkno, | |
1778 | &orphan_dir_bh, OCFS2_BH_CACHED, | |
1779 | orphan_dir_inode); | |
1780 | if (status < 0) { | |
1781 | mlog_errno(status); | |
1782 | goto leave; | |
1783 | } | |
1784 | ||
1785 | status = ocfs2_journal_access(handle, orphan_dir_inode, orphan_dir_bh, | |
1786 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1787 | if (status < 0) { | |
1788 | mlog_errno(status); | |
1789 | goto leave; | |
1790 | } | |
1791 | ||
1792 | /* we're a cluster, and nlink can change on disk from | |
1793 | * underneath us... */ | |
1794 | orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; | |
1795 | if (S_ISDIR(inode->i_mode)) | |
1796 | le16_add_cpu(&orphan_fe->i_links_count, 1); | |
1797 | orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count); | |
1798 | ||
1799 | status = ocfs2_journal_dirty(handle, orphan_dir_bh); | |
1800 | if (status < 0) { | |
1801 | mlog_errno(status); | |
1802 | goto leave; | |
1803 | } | |
1804 | ||
1805 | status = __ocfs2_add_entry(handle, orphan_dir_inode, name, | |
1806 | OCFS2_ORPHAN_NAMELEN, inode, | |
1807 | OCFS2_I(inode)->ip_blkno, | |
1808 | orphan_dir_bh, de_bh); | |
1809 | if (status < 0) { | |
1810 | mlog_errno(status); | |
1811 | goto leave; | |
1812 | } | |
1813 | ||
1814 | le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL); | |
1815 | ||
1816 | /* Record which orphan dir our inode now resides | |
1817 | * in. delete_inode will use this to determine which orphan | |
1818 | * dir to lock. */ | |
50008630 | 1819 | fe->i_orphaned_slot = cpu_to_le16(osb->slot_num); |
ccd979bd | 1820 | |
b0697053 MF |
1821 | mlog(0, "Inode %llu orphaned in slot %d\n", |
1822 | (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num); | |
ccd979bd MF |
1823 | |
1824 | leave: | |
ccd979bd MF |
1825 | if (orphan_dir_bh) |
1826 | brelse(orphan_dir_bh); | |
1827 | ||
1828 | mlog_exit(status); | |
1829 | return status; | |
1830 | } | |
1831 | ||
1832 | /* unlike orphan_add, we expect the orphan dir to already be locked here. */ | |
1833 | int ocfs2_orphan_del(struct ocfs2_super *osb, | |
1fabe148 | 1834 | handle_t *handle, |
ccd979bd MF |
1835 | struct inode *orphan_dir_inode, |
1836 | struct inode *inode, | |
1837 | struct buffer_head *orphan_dir_bh) | |
1838 | { | |
1839 | char name[OCFS2_ORPHAN_NAMELEN + 1]; | |
1840 | struct ocfs2_dinode *orphan_fe; | |
1841 | int status = 0; | |
1842 | struct buffer_head *target_de_bh = NULL; | |
1843 | struct ocfs2_dir_entry *target_de = NULL; | |
1844 | ||
1845 | mlog_entry_void(); | |
1846 | ||
1847 | status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); | |
1848 | if (status < 0) { | |
1849 | mlog_errno(status); | |
1850 | goto leave; | |
1851 | } | |
1852 | ||
b0697053 MF |
1853 | mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n", |
1854 | name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, | |
1855 | OCFS2_ORPHAN_NAMELEN); | |
ccd979bd MF |
1856 | |
1857 | /* find it's spot in the orphan directory */ | |
1858 | target_de_bh = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, | |
1859 | orphan_dir_inode, &target_de); | |
1860 | if (!target_de_bh) { | |
1861 | status = -ENOENT; | |
1862 | mlog_errno(status); | |
1863 | goto leave; | |
1864 | } | |
1865 | ||
1866 | /* remove it from the orphan directory */ | |
1867 | status = ocfs2_delete_entry(handle, orphan_dir_inode, target_de, | |
1868 | target_de_bh); | |
1869 | if (status < 0) { | |
1870 | mlog_errno(status); | |
1871 | goto leave; | |
1872 | } | |
1873 | ||
1874 | status = ocfs2_journal_access(handle,orphan_dir_inode, orphan_dir_bh, | |
1875 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1876 | if (status < 0) { | |
1877 | mlog_errno(status); | |
1878 | goto leave; | |
1879 | } | |
1880 | ||
1881 | /* do the i_nlink dance! :) */ | |
1882 | orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; | |
1883 | if (S_ISDIR(inode->i_mode)) | |
1884 | le16_add_cpu(&orphan_fe->i_links_count, -1); | |
1885 | orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count); | |
1886 | ||
1887 | status = ocfs2_journal_dirty(handle, orphan_dir_bh); | |
1888 | if (status < 0) { | |
1889 | mlog_errno(status); | |
1890 | goto leave; | |
1891 | } | |
1892 | ||
1893 | leave: | |
1894 | if (target_de_bh) | |
1895 | brelse(target_de_bh); | |
1896 | ||
1897 | mlog_exit(status); | |
1898 | return status; | |
1899 | } | |
1900 | ||
92e1d5be | 1901 | const struct inode_operations ocfs2_dir_iops = { |
ccd979bd MF |
1902 | .create = ocfs2_create, |
1903 | .lookup = ocfs2_lookup, | |
1904 | .link = ocfs2_link, | |
1905 | .unlink = ocfs2_unlink, | |
1906 | .rmdir = ocfs2_unlink, | |
1907 | .symlink = ocfs2_symlink, | |
1908 | .mkdir = ocfs2_mkdir, | |
1909 | .mknod = ocfs2_mknod, | |
1910 | .rename = ocfs2_rename, | |
1911 | .setattr = ocfs2_setattr, | |
1912 | .getattr = ocfs2_getattr, | |
d38eb8db | 1913 | .permission = ocfs2_permission, |
ccd979bd | 1914 | }; |