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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" | |
ccd979bd MF |
63 | |
64 | #include "buffer_head_io.h" | |
65 | ||
ccd979bd MF |
66 | static int ocfs2_mknod_locked(struct ocfs2_super *osb, |
67 | struct inode *dir, | |
68 | struct dentry *dentry, int mode, | |
69 | dev_t dev, | |
70 | struct buffer_head **new_fe_bh, | |
71 | struct buffer_head *parent_fe_bh, | |
1fabe148 | 72 | handle_t *handle, |
ccd979bd MF |
73 | struct inode **ret_inode, |
74 | struct ocfs2_alloc_context *inode_ac); | |
75 | ||
ccd979bd | 76 | static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, |
5098c27b | 77 | struct inode **ret_orphan_dir, |
ccd979bd MF |
78 | struct inode *inode, |
79 | char *name, | |
80 | struct buffer_head **de_bh); | |
81 | ||
82 | static int ocfs2_orphan_add(struct ocfs2_super *osb, | |
1fabe148 | 83 | handle_t *handle, |
ccd979bd MF |
84 | struct inode *inode, |
85 | struct ocfs2_dinode *fe, | |
86 | char *name, | |
5098c27b MF |
87 | struct buffer_head *de_bh, |
88 | struct inode *orphan_dir_inode); | |
ccd979bd MF |
89 | |
90 | static int ocfs2_create_symlink_data(struct ocfs2_super *osb, | |
1fabe148 | 91 | handle_t *handle, |
ccd979bd MF |
92 | struct inode *inode, |
93 | const char *symname); | |
94 | ||
ccd979bd MF |
95 | /* An orphan dir name is an 8 byte value, printed as a hex string */ |
96 | #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64))) | |
97 | ||
98 | static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry, | |
99 | struct nameidata *nd) | |
100 | { | |
101 | int status; | |
102 | u64 blkno; | |
ccd979bd MF |
103 | struct inode *inode = NULL; |
104 | struct dentry *ret; | |
ccd979bd MF |
105 | struct ocfs2_inode_info *oi; |
106 | ||
107 | mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry, | |
108 | dentry->d_name.len, dentry->d_name.name); | |
109 | ||
110 | if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) { | |
111 | ret = ERR_PTR(-ENAMETOOLONG); | |
112 | goto bail; | |
113 | } | |
114 | ||
b0697053 MF |
115 | mlog(0, "find name %.*s in directory %llu\n", dentry->d_name.len, |
116 | dentry->d_name.name, (unsigned long long)OCFS2_I(dir)->ip_blkno); | |
ccd979bd | 117 | |
e63aecb6 | 118 | status = ocfs2_inode_lock(dir, NULL, 0); |
ccd979bd MF |
119 | if (status < 0) { |
120 | if (status != -ENOENT) | |
121 | mlog_errno(status); | |
122 | ret = ERR_PTR(status); | |
123 | goto bail; | |
124 | } | |
125 | ||
be94d117 MF |
126 | status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name, |
127 | dentry->d_name.len, &blkno); | |
ccd979bd MF |
128 | if (status < 0) |
129 | goto bail_add; | |
130 | ||
5fa0613e | 131 | inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0); |
ccd979bd | 132 | if (IS_ERR(inode)) { |
ccd979bd MF |
133 | ret = ERR_PTR(-EACCES); |
134 | goto bail_unlock; | |
135 | } | |
136 | ||
137 | oi = OCFS2_I(inode); | |
138 | /* Clear any orphaned state... If we were able to look up the | |
139 | * inode from a directory, it certainly can't be orphaned. We | |
140 | * might have the bad state from a node which intended to | |
141 | * orphan this inode but crashed before it could commit the | |
142 | * unlink. */ | |
143 | spin_lock(&oi->ip_lock); | |
144 | oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED; | |
ccd979bd MF |
145 | spin_unlock(&oi->ip_lock); |
146 | ||
147 | bail_add: | |
ccd979bd MF |
148 | dentry->d_op = &ocfs2_dentry_ops; |
149 | ret = d_splice_alias(inode, dentry); | |
150 | ||
379dfe9d MF |
151 | if (inode) { |
152 | /* | |
153 | * If d_splice_alias() finds a DCACHE_DISCONNECTED | |
154 | * dentry, it will d_move() it on top of ourse. The | |
155 | * return value will indicate this however, so in | |
156 | * those cases, we switch them around for the locking | |
157 | * code. | |
158 | * | |
159 | * NOTE: This dentry already has ->d_op set from | |
160 | * ocfs2_get_parent() and ocfs2_get_dentry() | |
161 | */ | |
162 | if (ret) | |
163 | dentry = ret; | |
164 | ||
165 | status = ocfs2_dentry_attach_lock(dentry, inode, | |
0027dd5b | 166 | OCFS2_I(dir)->ip_blkno); |
379dfe9d MF |
167 | if (status) { |
168 | mlog_errno(status); | |
169 | ret = ERR_PTR(status); | |
170 | goto bail_unlock; | |
171 | } | |
172 | } | |
173 | ||
ccd979bd MF |
174 | bail_unlock: |
175 | /* Don't drop the cluster lock until *after* the d_add -- | |
176 | * unlink on another node will message us to remove that | |
177 | * dentry under this lock so otherwise we can race this with | |
34d024f8 | 178 | * the downconvert thread and have a stale dentry. */ |
e63aecb6 | 179 | ocfs2_inode_unlock(dir, 0); |
ccd979bd MF |
180 | |
181 | bail: | |
ccd979bd MF |
182 | |
183 | mlog_exit_ptr(ret); | |
184 | ||
185 | return ret; | |
186 | } | |
187 | ||
ccd979bd MF |
188 | static int ocfs2_mknod(struct inode *dir, |
189 | struct dentry *dentry, | |
190 | int mode, | |
191 | dev_t dev) | |
192 | { | |
193 | int status = 0; | |
194 | struct buffer_head *parent_fe_bh = NULL; | |
1fabe148 | 195 | handle_t *handle = NULL; |
ccd979bd MF |
196 | struct ocfs2_super *osb; |
197 | struct ocfs2_dinode *dirfe; | |
198 | struct buffer_head *new_fe_bh = NULL; | |
199 | struct buffer_head *de_bh = NULL; | |
200 | struct inode *inode = NULL; | |
201 | struct ocfs2_alloc_context *inode_ac = NULL; | |
202 | struct ocfs2_alloc_context *data_ac = NULL; | |
203 | ||
204 | mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode, | |
205 | (unsigned long)dev, dentry->d_name.len, | |
206 | dentry->d_name.name); | |
207 | ||
208 | /* get our super block */ | |
209 | osb = OCFS2_SB(dir->i_sb); | |
210 | ||
e63aecb6 | 211 | status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); |
e3a82138 MF |
212 | if (status < 0) { |
213 | if (status != -ENOENT) | |
214 | mlog_errno(status); | |
215 | return status; | |
216 | } | |
217 | ||
a663e305 MF |
218 | if (S_ISDIR(mode) && (dir->i_nlink >= OCFS2_LINK_MAX)) { |
219 | status = -EMLINK; | |
220 | goto leave; | |
221 | } | |
222 | ||
ccd979bd MF |
223 | dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; |
224 | if (!dirfe->i_links_count) { | |
225 | /* can't make a file in a deleted directory. */ | |
226 | status = -ENOENT; | |
227 | goto leave; | |
228 | } | |
229 | ||
230 | status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, | |
231 | dentry->d_name.len); | |
232 | if (status) | |
233 | goto leave; | |
234 | ||
235 | /* get a spot inside the dir. */ | |
236 | status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, | |
237 | dentry->d_name.name, | |
238 | dentry->d_name.len, &de_bh); | |
239 | if (status < 0) { | |
240 | mlog_errno(status); | |
241 | goto leave; | |
242 | } | |
243 | ||
244 | /* reserve an inode spot */ | |
da5cbf2f | 245 | status = ocfs2_reserve_new_inode(osb, &inode_ac); |
ccd979bd MF |
246 | if (status < 0) { |
247 | if (status != -ENOSPC) | |
248 | mlog_errno(status); | |
249 | goto leave; | |
250 | } | |
251 | ||
5b6a3a2b MF |
252 | /* Reserve a cluster if creating an extent based directory. */ |
253 | if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) { | |
da5cbf2f | 254 | status = ocfs2_reserve_clusters(osb, 1, &data_ac); |
ccd979bd MF |
255 | if (status < 0) { |
256 | if (status != -ENOSPC) | |
257 | mlog_errno(status); | |
258 | goto leave; | |
259 | } | |
260 | } | |
261 | ||
65eff9cc | 262 | handle = ocfs2_start_trans(osb, OCFS2_MKNOD_CREDITS); |
ccd979bd MF |
263 | if (IS_ERR(handle)) { |
264 | status = PTR_ERR(handle); | |
265 | handle = NULL; | |
266 | mlog_errno(status); | |
267 | goto leave; | |
268 | } | |
269 | ||
270 | /* do the real work now. */ | |
271 | status = ocfs2_mknod_locked(osb, dir, dentry, mode, dev, | |
272 | &new_fe_bh, parent_fe_bh, handle, | |
273 | &inode, inode_ac); | |
274 | if (status < 0) { | |
275 | mlog_errno(status); | |
276 | goto leave; | |
277 | } | |
278 | ||
279 | if (S_ISDIR(mode)) { | |
280 | status = ocfs2_fill_new_dir(osb, handle, dir, inode, | |
281 | new_fe_bh, data_ac); | |
282 | if (status < 0) { | |
283 | mlog_errno(status); | |
284 | goto leave; | |
285 | } | |
286 | ||
287 | status = ocfs2_journal_access(handle, dir, parent_fe_bh, | |
288 | OCFS2_JOURNAL_ACCESS_WRITE); | |
289 | if (status < 0) { | |
290 | mlog_errno(status); | |
291 | goto leave; | |
292 | } | |
293 | le16_add_cpu(&dirfe->i_links_count, 1); | |
294 | status = ocfs2_journal_dirty(handle, parent_fe_bh); | |
295 | if (status < 0) { | |
296 | mlog_errno(status); | |
297 | goto leave; | |
298 | } | |
d8c76e6f | 299 | inc_nlink(dir); |
ccd979bd MF |
300 | } |
301 | ||
302 | status = ocfs2_add_entry(handle, dentry, inode, | |
303 | OCFS2_I(inode)->ip_blkno, parent_fe_bh, | |
304 | de_bh); | |
305 | if (status < 0) { | |
306 | mlog_errno(status); | |
307 | goto leave; | |
308 | } | |
309 | ||
379dfe9d | 310 | status = ocfs2_dentry_attach_lock(dentry, inode, |
0027dd5b | 311 | OCFS2_I(dir)->ip_blkno); |
379dfe9d MF |
312 | if (status) { |
313 | mlog_errno(status); | |
314 | goto leave; | |
315 | } | |
316 | ||
ccd979bd MF |
317 | insert_inode_hash(inode); |
318 | dentry->d_op = &ocfs2_dentry_ops; | |
319 | d_instantiate(dentry, inode); | |
320 | status = 0; | |
321 | leave: | |
322 | if (handle) | |
02dc1af4 | 323 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 324 | |
e63aecb6 | 325 | ocfs2_inode_unlock(dir, 1); |
e3a82138 | 326 | |
ccd979bd MF |
327 | if (status == -ENOSPC) |
328 | mlog(0, "Disk is full\n"); | |
329 | ||
330 | if (new_fe_bh) | |
331 | brelse(new_fe_bh); | |
332 | ||
333 | if (de_bh) | |
334 | brelse(de_bh); | |
335 | ||
336 | if (parent_fe_bh) | |
337 | brelse(parent_fe_bh); | |
338 | ||
339 | if ((status < 0) && inode) | |
340 | iput(inode); | |
341 | ||
342 | if (inode_ac) | |
343 | ocfs2_free_alloc_context(inode_ac); | |
344 | ||
345 | if (data_ac) | |
346 | ocfs2_free_alloc_context(data_ac); | |
347 | ||
348 | mlog_exit(status); | |
349 | ||
350 | return status; | |
351 | } | |
352 | ||
353 | static int ocfs2_mknod_locked(struct ocfs2_super *osb, | |
354 | struct inode *dir, | |
355 | struct dentry *dentry, int mode, | |
356 | dev_t dev, | |
357 | struct buffer_head **new_fe_bh, | |
358 | struct buffer_head *parent_fe_bh, | |
1fabe148 | 359 | handle_t *handle, |
ccd979bd MF |
360 | struct inode **ret_inode, |
361 | struct ocfs2_alloc_context *inode_ac) | |
362 | { | |
363 | int status = 0; | |
364 | struct ocfs2_dinode *fe = NULL; | |
365 | struct ocfs2_extent_list *fel; | |
366 | u64 fe_blkno = 0; | |
367 | u16 suballoc_bit; | |
368 | struct inode *inode = NULL; | |
369 | ||
370 | mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode, | |
371 | (unsigned long)dev, dentry->d_name.len, | |
372 | dentry->d_name.name); | |
373 | ||
374 | *new_fe_bh = NULL; | |
375 | *ret_inode = NULL; | |
376 | ||
377 | status = ocfs2_claim_new_inode(osb, handle, inode_ac, &suballoc_bit, | |
378 | &fe_blkno); | |
379 | if (status < 0) { | |
380 | mlog_errno(status); | |
381 | goto leave; | |
382 | } | |
383 | ||
384 | inode = new_inode(dir->i_sb); | |
385 | if (IS_ERR(inode)) { | |
386 | status = PTR_ERR(inode); | |
387 | mlog(ML_ERROR, "new_inode failed!\n"); | |
388 | goto leave; | |
389 | } | |
390 | ||
391 | /* populate as many fields early on as possible - many of | |
392 | * these are used by the support functions here and in | |
393 | * callers. */ | |
394 | inode->i_ino = ino_from_blkno(osb->sb, fe_blkno); | |
395 | OCFS2_I(inode)->ip_blkno = fe_blkno; | |
396 | if (S_ISDIR(mode)) | |
397 | inode->i_nlink = 2; | |
398 | else | |
399 | inode->i_nlink = 1; | |
400 | inode->i_mode = mode; | |
401 | spin_lock(&osb->osb_lock); | |
402 | inode->i_generation = osb->s_next_generation++; | |
403 | spin_unlock(&osb->osb_lock); | |
404 | ||
405 | *new_fe_bh = sb_getblk(osb->sb, fe_blkno); | |
406 | if (!*new_fe_bh) { | |
407 | status = -EIO; | |
408 | mlog_errno(status); | |
409 | goto leave; | |
410 | } | |
411 | ocfs2_set_new_buffer_uptodate(inode, *new_fe_bh); | |
412 | ||
413 | status = ocfs2_journal_access(handle, inode, *new_fe_bh, | |
414 | OCFS2_JOURNAL_ACCESS_CREATE); | |
415 | if (status < 0) { | |
416 | mlog_errno(status); | |
417 | goto leave; | |
418 | } | |
419 | ||
420 | fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data; | |
421 | memset(fe, 0, osb->sb->s_blocksize); | |
422 | ||
423 | fe->i_generation = cpu_to_le32(inode->i_generation); | |
424 | fe->i_fs_generation = cpu_to_le32(osb->fs_generation); | |
425 | fe->i_blkno = cpu_to_le64(fe_blkno); | |
426 | fe->i_suballoc_bit = cpu_to_le16(suballoc_bit); | |
4d0ddb2c | 427 | fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot); |
ccd979bd MF |
428 | fe->i_uid = cpu_to_le32(current->fsuid); |
429 | if (dir->i_mode & S_ISGID) { | |
430 | fe->i_gid = cpu_to_le32(dir->i_gid); | |
431 | if (S_ISDIR(mode)) | |
432 | mode |= S_ISGID; | |
433 | } else | |
434 | fe->i_gid = cpu_to_le32(current->fsgid); | |
435 | fe->i_mode = cpu_to_le16(mode); | |
436 | if (S_ISCHR(mode) || S_ISBLK(mode)) | |
437 | fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev)); | |
438 | ||
439 | fe->i_links_count = cpu_to_le16(inode->i_nlink); | |
440 | ||
441 | fe->i_last_eb_blk = 0; | |
442 | strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE); | |
443 | le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL); | |
444 | fe->i_atime = fe->i_ctime = fe->i_mtime = | |
445 | cpu_to_le64(CURRENT_TIME.tv_sec); | |
446 | fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = | |
447 | cpu_to_le32(CURRENT_TIME.tv_nsec); | |
448 | fe->i_dtime = 0; | |
449 | ||
5b6a3a2b MF |
450 | /* |
451 | * If supported, directories start with inline data. | |
452 | */ | |
453 | if (S_ISDIR(mode) && ocfs2_supports_inline_data(osb)) { | |
454 | u16 feat = le16_to_cpu(fe->i_dyn_features); | |
455 | ||
456 | fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL); | |
457 | ||
458 | fe->id2.i_data.id_count = cpu_to_le16(ocfs2_max_inline_data(osb->sb)); | |
459 | } else { | |
460 | fel = &fe->id2.i_list; | |
461 | fel->l_tree_depth = 0; | |
462 | fel->l_next_free_rec = 0; | |
463 | fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb)); | |
464 | } | |
ccd979bd MF |
465 | |
466 | status = ocfs2_journal_dirty(handle, *new_fe_bh); | |
467 | if (status < 0) { | |
468 | mlog_errno(status); | |
469 | goto leave; | |
470 | } | |
471 | ||
472 | if (ocfs2_populate_inode(inode, fe, 1) < 0) { | |
473 | mlog(ML_ERROR, "populate inode failed! bh->b_blocknr=%llu, " | |
b0697053 | 474 | "i_blkno=%llu, i_ino=%lu\n", |
1ca1a111 MF |
475 | (unsigned long long)(*new_fe_bh)->b_blocknr, |
476 | (unsigned long long)le64_to_cpu(fe->i_blkno), | |
477 | inode->i_ino); | |
ccd979bd MF |
478 | BUG(); |
479 | } | |
480 | ||
481 | ocfs2_inode_set_new(osb, inode); | |
c271c5c2 SM |
482 | if (!ocfs2_mount_local(osb)) { |
483 | status = ocfs2_create_new_inode_locks(inode); | |
484 | if (status < 0) | |
485 | mlog_errno(status); | |
486 | } | |
ccd979bd MF |
487 | |
488 | status = 0; /* error in ocfs2_create_new_inode_locks is not | |
489 | * critical */ | |
490 | ||
491 | *ret_inode = inode; | |
492 | leave: | |
493 | if (status < 0) { | |
494 | if (*new_fe_bh) { | |
495 | brelse(*new_fe_bh); | |
496 | *new_fe_bh = NULL; | |
497 | } | |
498 | if (inode) | |
499 | iput(inode); | |
500 | } | |
501 | ||
502 | mlog_exit(status); | |
503 | return status; | |
504 | } | |
505 | ||
506 | static int ocfs2_mkdir(struct inode *dir, | |
507 | struct dentry *dentry, | |
508 | int mode) | |
509 | { | |
510 | int ret; | |
511 | ||
512 | mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode, | |
513 | dentry->d_name.len, dentry->d_name.name); | |
514 | ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0); | |
515 | mlog_exit(ret); | |
516 | ||
517 | return ret; | |
518 | } | |
519 | ||
520 | static int ocfs2_create(struct inode *dir, | |
521 | struct dentry *dentry, | |
522 | int mode, | |
523 | struct nameidata *nd) | |
524 | { | |
525 | int ret; | |
526 | ||
527 | mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode, | |
528 | dentry->d_name.len, dentry->d_name.name); | |
529 | ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0); | |
530 | mlog_exit(ret); | |
531 | ||
532 | return ret; | |
533 | } | |
534 | ||
535 | static int ocfs2_link(struct dentry *old_dentry, | |
536 | struct inode *dir, | |
537 | struct dentry *dentry) | |
538 | { | |
1fabe148 | 539 | handle_t *handle; |
ccd979bd MF |
540 | struct inode *inode = old_dentry->d_inode; |
541 | int err; | |
542 | struct buffer_head *fe_bh = NULL; | |
543 | struct buffer_head *parent_fe_bh = NULL; | |
544 | struct buffer_head *de_bh = NULL; | |
545 | struct ocfs2_dinode *fe = NULL; | |
546 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
547 | ||
548 | mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino, | |
549 | old_dentry->d_name.len, old_dentry->d_name.name, | |
550 | dentry->d_name.len, dentry->d_name.name); | |
551 | ||
123a9643 MF |
552 | if (S_ISDIR(inode->i_mode)) |
553 | return -EPERM; | |
ccd979bd | 554 | |
e63aecb6 | 555 | err = ocfs2_inode_lock(dir, &parent_fe_bh, 1); |
ccd979bd MF |
556 | if (err < 0) { |
557 | if (err != -ENOENT) | |
558 | mlog_errno(err); | |
123a9643 | 559 | return err; |
ccd979bd MF |
560 | } |
561 | ||
0f62de2c TY |
562 | if (!dir->i_nlink) { |
563 | err = -ENOENT; | |
123a9643 | 564 | goto out; |
0f62de2c TY |
565 | } |
566 | ||
ccd979bd MF |
567 | err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, |
568 | dentry->d_name.len); | |
569 | if (err) | |
123a9643 | 570 | goto out; |
ccd979bd MF |
571 | |
572 | err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, | |
573 | dentry->d_name.name, | |
574 | dentry->d_name.len, &de_bh); | |
575 | if (err < 0) { | |
576 | mlog_errno(err); | |
123a9643 | 577 | goto out; |
ccd979bd MF |
578 | } |
579 | ||
e63aecb6 | 580 | err = ocfs2_inode_lock(inode, &fe_bh, 1); |
ccd979bd MF |
581 | if (err < 0) { |
582 | if (err != -ENOENT) | |
583 | mlog_errno(err); | |
123a9643 | 584 | goto out; |
ccd979bd MF |
585 | } |
586 | ||
587 | fe = (struct ocfs2_dinode *) fe_bh->b_data; | |
588 | if (le16_to_cpu(fe->i_links_count) >= OCFS2_LINK_MAX) { | |
589 | err = -EMLINK; | |
123a9643 | 590 | goto out_unlock_inode; |
ccd979bd MF |
591 | } |
592 | ||
65eff9cc | 593 | handle = ocfs2_start_trans(osb, OCFS2_LINK_CREDITS); |
ccd979bd MF |
594 | if (IS_ERR(handle)) { |
595 | err = PTR_ERR(handle); | |
596 | handle = NULL; | |
597 | mlog_errno(err); | |
123a9643 | 598 | goto out_unlock_inode; |
ccd979bd MF |
599 | } |
600 | ||
601 | err = ocfs2_journal_access(handle, inode, fe_bh, | |
602 | OCFS2_JOURNAL_ACCESS_WRITE); | |
603 | if (err < 0) { | |
604 | mlog_errno(err); | |
123a9643 | 605 | goto out_commit; |
ccd979bd MF |
606 | } |
607 | ||
d8c76e6f | 608 | inc_nlink(inode); |
ccd979bd MF |
609 | inode->i_ctime = CURRENT_TIME; |
610 | fe->i_links_count = cpu_to_le16(inode->i_nlink); | |
611 | fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
612 | fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
613 | ||
614 | err = ocfs2_journal_dirty(handle, fe_bh); | |
615 | if (err < 0) { | |
616 | le16_add_cpu(&fe->i_links_count, -1); | |
9a53c3a7 | 617 | drop_nlink(inode); |
ccd979bd | 618 | mlog_errno(err); |
123a9643 | 619 | goto out_commit; |
ccd979bd MF |
620 | } |
621 | ||
622 | err = ocfs2_add_entry(handle, dentry, inode, | |
623 | OCFS2_I(inode)->ip_blkno, | |
624 | parent_fe_bh, de_bh); | |
625 | if (err) { | |
626 | le16_add_cpu(&fe->i_links_count, -1); | |
9a53c3a7 | 627 | drop_nlink(inode); |
ccd979bd | 628 | mlog_errno(err); |
123a9643 | 629 | goto out_commit; |
ccd979bd MF |
630 | } |
631 | ||
0027dd5b | 632 | err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); |
379dfe9d MF |
633 | if (err) { |
634 | mlog_errno(err); | |
123a9643 | 635 | goto out_commit; |
379dfe9d MF |
636 | } |
637 | ||
ccd979bd MF |
638 | atomic_inc(&inode->i_count); |
639 | dentry->d_op = &ocfs2_dentry_ops; | |
640 | d_instantiate(dentry, inode); | |
123a9643 MF |
641 | |
642 | out_commit: | |
02dc1af4 | 643 | ocfs2_commit_trans(osb, handle); |
123a9643 | 644 | out_unlock_inode: |
e63aecb6 | 645 | ocfs2_inode_unlock(inode, 1); |
123a9643 MF |
646 | |
647 | out: | |
e63aecb6 | 648 | ocfs2_inode_unlock(dir, 1); |
123a9643 | 649 | |
ccd979bd MF |
650 | if (de_bh) |
651 | brelse(de_bh); | |
652 | if (fe_bh) | |
653 | brelse(fe_bh); | |
654 | if (parent_fe_bh) | |
655 | brelse(parent_fe_bh); | |
656 | ||
657 | mlog_exit(err); | |
658 | ||
659 | return err; | |
660 | } | |
661 | ||
379dfe9d MF |
662 | /* |
663 | * Takes and drops an exclusive lock on the given dentry. This will | |
664 | * force other nodes to drop it. | |
665 | */ | |
666 | static int ocfs2_remote_dentry_delete(struct dentry *dentry) | |
667 | { | |
668 | int ret; | |
669 | ||
670 | ret = ocfs2_dentry_lock(dentry, 1); | |
671 | if (ret) | |
672 | mlog_errno(ret); | |
673 | else | |
674 | ocfs2_dentry_unlock(dentry, 1); | |
675 | ||
676 | return ret; | |
677 | } | |
678 | ||
17ff7856 MF |
679 | static inline int inode_is_unlinkable(struct inode *inode) |
680 | { | |
681 | if (S_ISDIR(inode->i_mode)) { | |
682 | if (inode->i_nlink == 2) | |
683 | return 1; | |
684 | return 0; | |
685 | } | |
686 | ||
687 | if (inode->i_nlink == 1) | |
688 | return 1; | |
689 | return 0; | |
690 | } | |
691 | ||
ccd979bd MF |
692 | static int ocfs2_unlink(struct inode *dir, |
693 | struct dentry *dentry) | |
694 | { | |
695 | int status; | |
30a4f5e8 | 696 | int child_locked = 0; |
ccd979bd | 697 | struct inode *inode = dentry->d_inode; |
5098c27b | 698 | struct inode *orphan_dir = NULL; |
ccd979bd MF |
699 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); |
700 | u64 blkno; | |
701 | struct ocfs2_dinode *fe = NULL; | |
702 | struct buffer_head *fe_bh = NULL; | |
703 | struct buffer_head *parent_node_bh = NULL; | |
1fabe148 | 704 | handle_t *handle = NULL; |
ccd979bd MF |
705 | struct ocfs2_dir_entry *dirent = NULL; |
706 | struct buffer_head *dirent_bh = NULL; | |
707 | char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; | |
708 | struct buffer_head *orphan_entry_bh = NULL; | |
709 | ||
710 | mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry, | |
711 | dentry->d_name.len, dentry->d_name.name); | |
712 | ||
713 | BUG_ON(dentry->d_parent->d_inode != dir); | |
714 | ||
b0697053 | 715 | mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno); |
ccd979bd MF |
716 | |
717 | if (inode == osb->root_inode) { | |
718 | mlog(0, "Cannot delete the root directory\n"); | |
30a4f5e8 | 719 | return -EPERM; |
ccd979bd MF |
720 | } |
721 | ||
e63aecb6 | 722 | status = ocfs2_inode_lock(dir, &parent_node_bh, 1); |
ccd979bd MF |
723 | if (status < 0) { |
724 | if (status != -ENOENT) | |
725 | mlog_errno(status); | |
30a4f5e8 | 726 | return status; |
ccd979bd MF |
727 | } |
728 | ||
729 | status = ocfs2_find_files_on_disk(dentry->d_name.name, | |
730 | dentry->d_name.len, &blkno, | |
731 | dir, &dirent_bh, &dirent); | |
732 | if (status < 0) { | |
733 | if (status != -ENOENT) | |
734 | mlog_errno(status); | |
735 | goto leave; | |
736 | } | |
737 | ||
738 | if (OCFS2_I(inode)->ip_blkno != blkno) { | |
739 | status = -ENOENT; | |
740 | ||
b0697053 MF |
741 | mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n", |
742 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
743 | (unsigned long long)blkno, OCFS2_I(inode)->ip_flags); | |
ccd979bd MF |
744 | goto leave; |
745 | } | |
746 | ||
e63aecb6 | 747 | status = ocfs2_inode_lock(inode, &fe_bh, 1); |
ccd979bd MF |
748 | if (status < 0) { |
749 | if (status != -ENOENT) | |
750 | mlog_errno(status); | |
751 | goto leave; | |
752 | } | |
30a4f5e8 | 753 | child_locked = 1; |
ccd979bd MF |
754 | |
755 | if (S_ISDIR(inode->i_mode)) { | |
756 | if (!ocfs2_empty_dir(inode)) { | |
757 | status = -ENOTEMPTY; | |
758 | goto leave; | |
759 | } else if (inode->i_nlink != 2) { | |
760 | status = -ENOTEMPTY; | |
761 | goto leave; | |
762 | } | |
763 | } | |
764 | ||
379dfe9d | 765 | status = ocfs2_remote_dentry_delete(dentry); |
ccd979bd | 766 | if (status < 0) { |
34d024f8 | 767 | /* This remote delete should succeed under all normal |
ccd979bd MF |
768 | * circumstances. */ |
769 | mlog_errno(status); | |
770 | goto leave; | |
771 | } | |
772 | ||
17ff7856 | 773 | if (inode_is_unlinkable(inode)) { |
5098c27b | 774 | status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, inode, |
ccd979bd MF |
775 | orphan_name, |
776 | &orphan_entry_bh); | |
777 | if (status < 0) { | |
778 | mlog_errno(status); | |
779 | goto leave; | |
780 | } | |
781 | } | |
782 | ||
65eff9cc | 783 | handle = ocfs2_start_trans(osb, OCFS2_UNLINK_CREDITS); |
ccd979bd MF |
784 | if (IS_ERR(handle)) { |
785 | status = PTR_ERR(handle); | |
786 | handle = NULL; | |
787 | mlog_errno(status); | |
788 | goto leave; | |
789 | } | |
790 | ||
791 | status = ocfs2_journal_access(handle, inode, fe_bh, | |
792 | OCFS2_JOURNAL_ACCESS_WRITE); | |
793 | if (status < 0) { | |
794 | mlog_errno(status); | |
795 | goto leave; | |
796 | } | |
797 | ||
798 | fe = (struct ocfs2_dinode *) fe_bh->b_data; | |
799 | ||
17ff7856 | 800 | if (inode_is_unlinkable(inode)) { |
ccd979bd | 801 | status = ocfs2_orphan_add(osb, handle, inode, fe, orphan_name, |
5098c27b | 802 | orphan_entry_bh, orphan_dir); |
ccd979bd MF |
803 | if (status < 0) { |
804 | mlog_errno(status); | |
805 | goto leave; | |
806 | } | |
807 | } | |
808 | ||
809 | /* delete the name from the parent dir */ | |
810 | status = ocfs2_delete_entry(handle, dir, dirent, dirent_bh); | |
811 | if (status < 0) { | |
812 | mlog_errno(status); | |
813 | goto leave; | |
814 | } | |
815 | ||
17ff7856 MF |
816 | if (S_ISDIR(inode->i_mode)) |
817 | drop_nlink(inode); | |
818 | drop_nlink(inode); | |
ccd979bd | 819 | fe->i_links_count = cpu_to_le16(inode->i_nlink); |
ccd979bd MF |
820 | |
821 | status = ocfs2_journal_dirty(handle, fe_bh); | |
822 | if (status < 0) { | |
823 | mlog_errno(status); | |
824 | goto leave; | |
825 | } | |
826 | ||
592282cf MF |
827 | dir->i_ctime = dir->i_mtime = CURRENT_TIME; |
828 | if (S_ISDIR(inode->i_mode)) | |
17ff7856 | 829 | drop_nlink(dir); |
592282cf MF |
830 | |
831 | status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh); | |
832 | if (status < 0) { | |
833 | mlog_errno(status); | |
834 | if (S_ISDIR(inode->i_mode)) | |
d8c76e6f | 835 | inc_nlink(dir); |
ccd979bd MF |
836 | } |
837 | ||
838 | leave: | |
ccd979bd | 839 | if (handle) |
02dc1af4 | 840 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 841 | |
30a4f5e8 | 842 | if (child_locked) |
e63aecb6 | 843 | ocfs2_inode_unlock(inode, 1); |
30a4f5e8 | 844 | |
e63aecb6 | 845 | ocfs2_inode_unlock(dir, 1); |
30a4f5e8 | 846 | |
5098c27b MF |
847 | if (orphan_dir) { |
848 | /* This was locked for us in ocfs2_prepare_orphan_dir() */ | |
e63aecb6 | 849 | ocfs2_inode_unlock(orphan_dir, 1); |
5098c27b MF |
850 | mutex_unlock(&orphan_dir->i_mutex); |
851 | iput(orphan_dir); | |
852 | } | |
853 | ||
ccd979bd MF |
854 | if (fe_bh) |
855 | brelse(fe_bh); | |
856 | ||
857 | if (dirent_bh) | |
858 | brelse(dirent_bh); | |
859 | ||
860 | if (parent_node_bh) | |
861 | brelse(parent_node_bh); | |
862 | ||
863 | if (orphan_entry_bh) | |
864 | brelse(orphan_entry_bh); | |
865 | ||
866 | mlog_exit(status); | |
867 | ||
868 | return status; | |
869 | } | |
870 | ||
871 | /* | |
872 | * The only place this should be used is rename! | |
873 | * if they have the same id, then the 1st one is the only one locked. | |
874 | */ | |
875 | static int ocfs2_double_lock(struct ocfs2_super *osb, | |
ccd979bd MF |
876 | struct buffer_head **bh1, |
877 | struct inode *inode1, | |
878 | struct buffer_head **bh2, | |
879 | struct inode *inode2) | |
880 | { | |
881 | int status; | |
882 | struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); | |
883 | struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); | |
884 | struct buffer_head **tmpbh; | |
885 | struct inode *tmpinode; | |
886 | ||
b0697053 MF |
887 | mlog_entry("(inode1 = %llu, inode2 = %llu)\n", |
888 | (unsigned long long)oi1->ip_blkno, | |
889 | (unsigned long long)oi2->ip_blkno); | |
ccd979bd | 890 | |
ccd979bd MF |
891 | if (*bh1) |
892 | *bh1 = NULL; | |
893 | if (*bh2) | |
894 | *bh2 = NULL; | |
895 | ||
896 | /* we always want to lock the one with the lower lockid first. */ | |
897 | if (oi1->ip_blkno != oi2->ip_blkno) { | |
898 | if (oi1->ip_blkno < oi2->ip_blkno) { | |
899 | /* switch id1 and id2 around */ | |
900 | mlog(0, "switching them around...\n"); | |
901 | tmpbh = bh2; | |
902 | bh2 = bh1; | |
903 | bh1 = tmpbh; | |
904 | ||
905 | tmpinode = inode2; | |
906 | inode2 = inode1; | |
907 | inode1 = tmpinode; | |
908 | } | |
909 | /* lock id2 */ | |
e63aecb6 | 910 | status = ocfs2_inode_lock(inode2, bh2, 1); |
ccd979bd MF |
911 | if (status < 0) { |
912 | if (status != -ENOENT) | |
913 | mlog_errno(status); | |
914 | goto bail; | |
915 | } | |
916 | } | |
8d5596c6 | 917 | |
ccd979bd | 918 | /* lock id1 */ |
e63aecb6 | 919 | status = ocfs2_inode_lock(inode1, bh1, 1); |
ccd979bd | 920 | if (status < 0) { |
8d5596c6 MF |
921 | /* |
922 | * An error return must mean that no cluster locks | |
923 | * were held on function exit. | |
924 | */ | |
925 | if (oi1->ip_blkno != oi2->ip_blkno) | |
e63aecb6 | 926 | ocfs2_inode_unlock(inode2, 1); |
8d5596c6 | 927 | |
ccd979bd MF |
928 | if (status != -ENOENT) |
929 | mlog_errno(status); | |
ccd979bd | 930 | } |
8d5596c6 | 931 | |
ccd979bd MF |
932 | bail: |
933 | mlog_exit(status); | |
934 | return status; | |
935 | } | |
936 | ||
8d5596c6 MF |
937 | static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2) |
938 | { | |
e63aecb6 | 939 | ocfs2_inode_unlock(inode1, 1); |
8d5596c6 MF |
940 | |
941 | if (inode1 != inode2) | |
e63aecb6 | 942 | ocfs2_inode_unlock(inode2, 1); |
8d5596c6 MF |
943 | } |
944 | ||
ccd979bd MF |
945 | static int ocfs2_rename(struct inode *old_dir, |
946 | struct dentry *old_dentry, | |
947 | struct inode *new_dir, | |
948 | struct dentry *new_dentry) | |
949 | { | |
8d5596c6 MF |
950 | int status = 0, rename_lock = 0, parents_locked = 0; |
951 | int old_child_locked = 0, new_child_locked = 0; | |
ccd979bd MF |
952 | struct inode *old_inode = old_dentry->d_inode; |
953 | struct inode *new_inode = new_dentry->d_inode; | |
5098c27b | 954 | struct inode *orphan_dir = NULL; |
ccd979bd MF |
955 | struct ocfs2_dinode *newfe = NULL; |
956 | char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; | |
957 | struct buffer_head *orphan_entry_bh = NULL; | |
958 | struct buffer_head *newfe_bh = NULL; | |
592282cf | 959 | struct buffer_head *old_inode_bh = NULL; |
ccd979bd MF |
960 | struct buffer_head *insert_entry_bh = NULL; |
961 | struct ocfs2_super *osb = NULL; | |
5b6a3a2b | 962 | u64 newfe_blkno, old_de_ino; |
1fabe148 | 963 | handle_t *handle = NULL; |
ccd979bd MF |
964 | struct buffer_head *old_dir_bh = NULL; |
965 | struct buffer_head *new_dir_bh = NULL; | |
38760e24 MF |
966 | struct ocfs2_dir_entry *old_inode_dot_dot_de = NULL, *old_de = NULL, |
967 | *new_de = NULL; | |
ccd979bd MF |
968 | struct buffer_head *new_de_bh = NULL, *old_de_bh = NULL; // bhs for above |
969 | struct buffer_head *old_inode_de_bh = NULL; // if old_dentry is a dir, | |
970 | // this is the 1st dirent bh | |
592282cf | 971 | nlink_t old_dir_nlink = old_dir->i_nlink; |
480214d7 | 972 | struct ocfs2_dinode *old_di; |
ccd979bd MF |
973 | |
974 | /* At some point it might be nice to break this function up a | |
975 | * bit. */ | |
976 | ||
977 | mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n", | |
978 | old_dir, old_dentry, new_dir, new_dentry, | |
979 | old_dentry->d_name.len, old_dentry->d_name.name, | |
980 | new_dentry->d_name.len, new_dentry->d_name.name); | |
981 | ||
982 | osb = OCFS2_SB(old_dir->i_sb); | |
983 | ||
984 | if (new_inode) { | |
985 | if (!igrab(new_inode)) | |
986 | BUG(); | |
987 | } | |
988 | ||
1b3c3714 | 989 | /* Assume a directory hierarchy thusly: |
ccd979bd MF |
990 | * a/b/c |
991 | * a/d | |
992 | * a,b,c, and d are all directories. | |
993 | * | |
994 | * from cwd of 'a' on both nodes: | |
995 | * node1: mv b/c d | |
996 | * node2: mv d b/c | |
997 | * | |
998 | * And that's why, just like the VFS, we need a file system | |
999 | * rename lock. */ | |
1000 | if (old_dentry != new_dentry) { | |
1001 | status = ocfs2_rename_lock(osb); | |
1002 | if (status < 0) { | |
1003 | mlog_errno(status); | |
1004 | goto bail; | |
1005 | } | |
1006 | rename_lock = 1; | |
1007 | } | |
1008 | ||
ccd979bd | 1009 | /* if old and new are the same, this'll just do one lock. */ |
8d5596c6 MF |
1010 | status = ocfs2_double_lock(osb, &old_dir_bh, old_dir, |
1011 | &new_dir_bh, new_dir); | |
ccd979bd MF |
1012 | if (status < 0) { |
1013 | mlog_errno(status); | |
1014 | goto bail; | |
1015 | } | |
8d5596c6 | 1016 | parents_locked = 1; |
ccd979bd MF |
1017 | |
1018 | /* make sure both dirs have bhs | |
1019 | * get an extra ref on old_dir_bh if old==new */ | |
1020 | if (!new_dir_bh) { | |
1021 | if (old_dir_bh) { | |
1022 | new_dir_bh = old_dir_bh; | |
1023 | get_bh(new_dir_bh); | |
1024 | } else { | |
1025 | mlog(ML_ERROR, "no old_dir_bh!\n"); | |
1026 | status = -EIO; | |
1027 | goto bail; | |
1028 | } | |
1029 | } | |
1030 | ||
379dfe9d | 1031 | /* |
592282cf | 1032 | * Aside from allowing a meta data update, the locking here |
34d024f8 MF |
1033 | * also ensures that the downconvert thread on other nodes |
1034 | * won't have to concurrently downconvert the inode and the | |
1035 | * dentry locks. | |
379dfe9d | 1036 | */ |
e63aecb6 | 1037 | status = ocfs2_inode_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 | ||
e325a88f SE |
1108 | if (!new_de && new_inode) { |
1109 | /* | |
1110 | * Target was unlinked by another node while we were | |
1111 | * waiting to get to ocfs2_rename(). There isn't | |
1112 | * anything we can do here to help the situation, so | |
1113 | * bubble up the appropriate error. | |
1114 | */ | |
1115 | status = -ENOENT; | |
1116 | goto bail; | |
1117 | } | |
ccd979bd MF |
1118 | |
1119 | /* In case we need to overwrite an existing file, we blow it | |
1120 | * away first */ | |
1121 | if (new_de) { | |
1122 | /* VFS didn't think there existed an inode here, but | |
1123 | * someone else in the cluster must have raced our | |
1124 | * rename to create one. Today we error cleanly, in | |
1125 | * the future we should consider calling iget to build | |
1126 | * a new struct inode for this entry. */ | |
1127 | if (!new_inode) { | |
1128 | status = -EACCES; | |
1129 | ||
1130 | mlog(0, "We found an inode for name %.*s but VFS " | |
1131 | "didn't give us one.\n", new_dentry->d_name.len, | |
1132 | new_dentry->d_name.name); | |
1133 | goto bail; | |
1134 | } | |
1135 | ||
1136 | if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { | |
1137 | status = -EACCES; | |
1138 | ||
b0697053 MF |
1139 | mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n", |
1140 | (unsigned long long)OCFS2_I(new_inode)->ip_blkno, | |
1141 | (unsigned long long)newfe_blkno, | |
ccd979bd MF |
1142 | OCFS2_I(new_inode)->ip_flags); |
1143 | goto bail; | |
1144 | } | |
1145 | ||
e63aecb6 | 1146 | status = ocfs2_inode_lock(new_inode, &newfe_bh, 1); |
ccd979bd MF |
1147 | if (status < 0) { |
1148 | if (status != -ENOENT) | |
1149 | mlog_errno(status); | |
1150 | goto bail; | |
1151 | } | |
8d5596c6 | 1152 | new_child_locked = 1; |
ccd979bd | 1153 | |
379dfe9d | 1154 | status = ocfs2_remote_dentry_delete(new_dentry); |
ccd979bd MF |
1155 | if (status < 0) { |
1156 | mlog_errno(status); | |
1157 | goto bail; | |
1158 | } | |
1159 | ||
1160 | newfe = (struct ocfs2_dinode *) newfe_bh->b_data; | |
1161 | ||
b0697053 MF |
1162 | mlog(0, "aha rename over existing... new_de=%p new_blkno=%llu " |
1163 | "newfebh=%p bhblocknr=%llu\n", new_de, | |
1164 | (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? | |
ccd979bd MF |
1165 | (unsigned long long)newfe_bh->b_blocknr : 0ULL); |
1166 | ||
1167 | if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { | |
5098c27b | 1168 | status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, |
ccd979bd MF |
1169 | new_inode, |
1170 | orphan_name, | |
1171 | &orphan_entry_bh); | |
1172 | if (status < 0) { | |
1173 | mlog_errno(status); | |
1174 | goto bail; | |
1175 | } | |
1176 | } | |
1177 | } else { | |
1178 | BUG_ON(new_dentry->d_parent->d_inode != new_dir); | |
1179 | ||
1180 | status = ocfs2_check_dir_for_entry(new_dir, | |
1181 | new_dentry->d_name.name, | |
1182 | new_dentry->d_name.len); | |
1183 | if (status) | |
1184 | goto bail; | |
1185 | ||
1186 | status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, | |
1187 | new_dentry->d_name.name, | |
1188 | new_dentry->d_name.len, | |
1189 | &insert_entry_bh); | |
1190 | if (status < 0) { | |
1191 | mlog_errno(status); | |
1192 | goto bail; | |
1193 | } | |
1194 | } | |
1195 | ||
65eff9cc | 1196 | handle = ocfs2_start_trans(osb, OCFS2_RENAME_CREDITS); |
ccd979bd MF |
1197 | if (IS_ERR(handle)) { |
1198 | status = PTR_ERR(handle); | |
1199 | handle = NULL; | |
1200 | mlog_errno(status); | |
1201 | goto bail; | |
1202 | } | |
1203 | ||
1204 | if (new_de) { | |
1205 | if (S_ISDIR(new_inode->i_mode)) { | |
1206 | if (!ocfs2_empty_dir(new_inode) || | |
1207 | new_inode->i_nlink != 2) { | |
1208 | status = -ENOTEMPTY; | |
1209 | goto bail; | |
1210 | } | |
1211 | } | |
1212 | status = ocfs2_journal_access(handle, new_inode, newfe_bh, | |
1213 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1214 | if (status < 0) { | |
1215 | mlog_errno(status); | |
1216 | goto bail; | |
1217 | } | |
1218 | ||
1219 | if (S_ISDIR(new_inode->i_mode) || | |
1220 | (newfe->i_links_count == cpu_to_le16(1))){ | |
1221 | status = ocfs2_orphan_add(osb, handle, new_inode, | |
1222 | newfe, orphan_name, | |
5098c27b | 1223 | orphan_entry_bh, orphan_dir); |
ccd979bd MF |
1224 | if (status < 0) { |
1225 | mlog_errno(status); | |
1226 | goto bail; | |
1227 | } | |
1228 | } | |
1229 | ||
1230 | /* change the dirent to point to the correct inode */ | |
38760e24 MF |
1231 | status = ocfs2_update_entry(new_dir, handle, new_de_bh, |
1232 | new_de, old_inode); | |
ccd979bd MF |
1233 | if (status < 0) { |
1234 | mlog_errno(status); | |
1235 | goto bail; | |
1236 | } | |
ccd979bd | 1237 | new_dir->i_version++; |
ccd979bd MF |
1238 | |
1239 | if (S_ISDIR(new_inode->i_mode)) | |
1240 | newfe->i_links_count = 0; | |
1241 | else | |
1242 | le16_add_cpu(&newfe->i_links_count, -1); | |
1243 | ||
1244 | status = ocfs2_journal_dirty(handle, newfe_bh); | |
1245 | if (status < 0) { | |
1246 | mlog_errno(status); | |
1247 | goto bail; | |
1248 | } | |
1249 | } else { | |
1250 | /* if the name was not found in new_dir, add it now */ | |
1251 | status = ocfs2_add_entry(handle, new_dentry, old_inode, | |
1252 | OCFS2_I(old_inode)->ip_blkno, | |
1253 | new_dir_bh, insert_entry_bh); | |
1254 | } | |
1255 | ||
1256 | old_inode->i_ctime = CURRENT_TIME; | |
1257 | mark_inode_dirty(old_inode); | |
480214d7 SM |
1258 | |
1259 | status = ocfs2_journal_access(handle, old_inode, old_inode_bh, | |
1260 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1261 | if (status >= 0) { | |
1262 | old_di = (struct ocfs2_dinode *) old_inode_bh->b_data; | |
1263 | ||
1264 | old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec); | |
1265 | old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec); | |
1266 | ||
1267 | status = ocfs2_journal_dirty(handle, old_inode_bh); | |
1268 | if (status < 0) | |
1269 | mlog_errno(status); | |
1270 | } else | |
1271 | mlog_errno(status); | |
ccd979bd | 1272 | |
5b6a3a2b MF |
1273 | /* |
1274 | * Now that the name has been added to new_dir, remove the old name. | |
1275 | * | |
1276 | * We don't keep any directory entry context around until now | |
1277 | * because the insert might have changed the type of directory | |
1278 | * we're dealing with. | |
1279 | */ | |
1280 | old_de_bh = ocfs2_find_entry(old_dentry->d_name.name, | |
1281 | old_dentry->d_name.len, | |
1282 | old_dir, &old_de); | |
1283 | if (!old_de_bh) { | |
1284 | status = -EIO; | |
1285 | goto bail; | |
1286 | } | |
1287 | ||
ccd979bd MF |
1288 | status = ocfs2_delete_entry(handle, old_dir, old_de, old_de_bh); |
1289 | if (status < 0) { | |
1290 | mlog_errno(status); | |
1291 | goto bail; | |
1292 | } | |
1293 | ||
1294 | if (new_inode) { | |
1295 | new_inode->i_nlink--; | |
1296 | new_inode->i_ctime = CURRENT_TIME; | |
1297 | } | |
1298 | old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME; | |
1299 | if (old_inode_de_bh) { | |
38760e24 MF |
1300 | status = ocfs2_update_entry(old_inode, handle, old_inode_de_bh, |
1301 | old_inode_dot_dot_de, new_dir); | |
ccd979bd MF |
1302 | old_dir->i_nlink--; |
1303 | if (new_inode) { | |
1304 | new_inode->i_nlink--; | |
1305 | } else { | |
d8c76e6f | 1306 | inc_nlink(new_dir); |
ccd979bd MF |
1307 | mark_inode_dirty(new_dir); |
1308 | } | |
1309 | } | |
1310 | mark_inode_dirty(old_dir); | |
592282cf MF |
1311 | ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh); |
1312 | if (new_inode) { | |
ccd979bd | 1313 | mark_inode_dirty(new_inode); |
592282cf MF |
1314 | ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh); |
1315 | } | |
ccd979bd | 1316 | |
592282cf MF |
1317 | if (old_dir != new_dir) { |
1318 | /* Keep the same times on both directories.*/ | |
1319 | new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime; | |
1320 | ||
1321 | /* | |
1322 | * This will also pick up the i_nlink change from the | |
1323 | * block above. | |
1324 | */ | |
1325 | ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh); | |
1326 | } | |
ccd979bd MF |
1327 | |
1328 | if (old_dir_nlink != old_dir->i_nlink) { | |
1329 | if (!old_dir_bh) { | |
1330 | mlog(ML_ERROR, "need to change nlink for old dir " | |
b0697053 MF |
1331 | "%llu from %d to %d but bh is NULL!\n", |
1332 | (unsigned long long)OCFS2_I(old_dir)->ip_blkno, | |
1333 | (int)old_dir_nlink, old_dir->i_nlink); | |
ccd979bd MF |
1334 | } else { |
1335 | struct ocfs2_dinode *fe; | |
1336 | status = ocfs2_journal_access(handle, old_dir, | |
1337 | old_dir_bh, | |
1338 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1339 | fe = (struct ocfs2_dinode *) old_dir_bh->b_data; | |
1340 | fe->i_links_count = cpu_to_le16(old_dir->i_nlink); | |
1341 | status = ocfs2_journal_dirty(handle, old_dir_bh); | |
1342 | } | |
1343 | } | |
1344 | ||
379dfe9d | 1345 | ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); |
ccd979bd MF |
1346 | status = 0; |
1347 | bail: | |
1348 | if (rename_lock) | |
1349 | ocfs2_rename_unlock(osb); | |
1350 | ||
1351 | if (handle) | |
02dc1af4 | 1352 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 1353 | |
8d5596c6 MF |
1354 | if (parents_locked) |
1355 | ocfs2_double_unlock(old_dir, new_dir); | |
1356 | ||
1357 | if (old_child_locked) | |
e63aecb6 | 1358 | ocfs2_inode_unlock(old_inode, 1); |
8d5596c6 MF |
1359 | |
1360 | if (new_child_locked) | |
e63aecb6 | 1361 | ocfs2_inode_unlock(new_inode, 1); |
8d5596c6 | 1362 | |
5098c27b MF |
1363 | if (orphan_dir) { |
1364 | /* This was locked for us in ocfs2_prepare_orphan_dir() */ | |
e63aecb6 | 1365 | ocfs2_inode_unlock(orphan_dir, 1); |
5098c27b MF |
1366 | mutex_unlock(&orphan_dir->i_mutex); |
1367 | iput(orphan_dir); | |
1368 | } | |
1369 | ||
ccd979bd MF |
1370 | if (new_inode) |
1371 | sync_mapping_buffers(old_inode->i_mapping); | |
1372 | ||
1373 | if (new_inode) | |
1374 | iput(new_inode); | |
1375 | if (newfe_bh) | |
1376 | brelse(newfe_bh); | |
592282cf MF |
1377 | if (old_inode_bh) |
1378 | brelse(old_inode_bh); | |
ccd979bd MF |
1379 | if (old_dir_bh) |
1380 | brelse(old_dir_bh); | |
1381 | if (new_dir_bh) | |
1382 | brelse(new_dir_bh); | |
1383 | if (new_de_bh) | |
1384 | brelse(new_de_bh); | |
1385 | if (old_de_bh) | |
1386 | brelse(old_de_bh); | |
1387 | if (old_inode_de_bh) | |
1388 | brelse(old_inode_de_bh); | |
1389 | if (orphan_entry_bh) | |
1390 | brelse(orphan_entry_bh); | |
1391 | if (insert_entry_bh) | |
1392 | brelse(insert_entry_bh); | |
1393 | ||
1394 | mlog_exit(status); | |
1395 | ||
1396 | return status; | |
1397 | } | |
1398 | ||
1399 | /* | |
1400 | * we expect i_size = strlen(symname). Copy symname into the file | |
1401 | * data, including the null terminator. | |
1402 | */ | |
1403 | static int ocfs2_create_symlink_data(struct ocfs2_super *osb, | |
1fabe148 | 1404 | handle_t *handle, |
ccd979bd MF |
1405 | struct inode *inode, |
1406 | const char *symname) | |
1407 | { | |
1408 | struct buffer_head **bhs = NULL; | |
1409 | const char *c; | |
1410 | struct super_block *sb = osb->sb; | |
4f902c37 | 1411 | u64 p_blkno, p_blocks; |
ccd979bd MF |
1412 | int virtual, blocks, status, i, bytes_left; |
1413 | ||
1414 | bytes_left = i_size_read(inode) + 1; | |
1415 | /* we can't trust i_blocks because we're actually going to | |
1416 | * write i_size + 1 bytes. */ | |
1417 | blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; | |
1418 | ||
5515eff8 AM |
1419 | mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n", |
1420 | (unsigned long long)inode->i_blocks, | |
1421 | i_size_read(inode), blocks); | |
ccd979bd MF |
1422 | |
1423 | /* Sanity check -- make sure we're going to fit. */ | |
1424 | if (bytes_left > | |
1425 | ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { | |
1426 | status = -EIO; | |
1427 | mlog_errno(status); | |
1428 | goto bail; | |
1429 | } | |
1430 | ||
1431 | bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); | |
1432 | if (!bhs) { | |
1433 | status = -ENOMEM; | |
1434 | mlog_errno(status); | |
1435 | goto bail; | |
1436 | } | |
1437 | ||
49cb8d2d MF |
1438 | status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks, |
1439 | NULL); | |
ccd979bd MF |
1440 | if (status < 0) { |
1441 | mlog_errno(status); | |
1442 | goto bail; | |
1443 | } | |
1444 | ||
1445 | /* links can never be larger than one cluster so we know this | |
1446 | * is all going to be contiguous, but do a sanity check | |
1447 | * anyway. */ | |
1448 | if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { | |
1449 | status = -EIO; | |
1450 | mlog_errno(status); | |
1451 | goto bail; | |
1452 | } | |
1453 | ||
1454 | virtual = 0; | |
1455 | while(bytes_left > 0) { | |
1456 | c = &symname[virtual * sb->s_blocksize]; | |
1457 | ||
1458 | bhs[virtual] = sb_getblk(sb, p_blkno); | |
1459 | if (!bhs[virtual]) { | |
1460 | status = -ENOMEM; | |
1461 | mlog_errno(status); | |
1462 | goto bail; | |
1463 | } | |
1464 | ocfs2_set_new_buffer_uptodate(inode, bhs[virtual]); | |
1465 | ||
1466 | status = ocfs2_journal_access(handle, inode, bhs[virtual], | |
1467 | OCFS2_JOURNAL_ACCESS_CREATE); | |
1468 | if (status < 0) { | |
1469 | mlog_errno(status); | |
1470 | goto bail; | |
1471 | } | |
1472 | ||
1473 | memset(bhs[virtual]->b_data, 0, sb->s_blocksize); | |
1474 | ||
1475 | memcpy(bhs[virtual]->b_data, c, | |
1476 | (bytes_left > sb->s_blocksize) ? sb->s_blocksize : | |
1477 | bytes_left); | |
1478 | ||
1479 | status = ocfs2_journal_dirty(handle, bhs[virtual]); | |
1480 | if (status < 0) { | |
1481 | mlog_errno(status); | |
1482 | goto bail; | |
1483 | } | |
1484 | ||
1485 | virtual++; | |
1486 | p_blkno++; | |
1487 | bytes_left -= sb->s_blocksize; | |
1488 | } | |
1489 | ||
1490 | status = 0; | |
1491 | bail: | |
1492 | ||
1493 | if (bhs) { | |
1494 | for(i = 0; i < blocks; i++) | |
1495 | if (bhs[i]) | |
1496 | brelse(bhs[i]); | |
1497 | kfree(bhs); | |
1498 | } | |
1499 | ||
1500 | mlog_exit(status); | |
1501 | return status; | |
1502 | } | |
1503 | ||
1504 | static int ocfs2_symlink(struct inode *dir, | |
1505 | struct dentry *dentry, | |
1506 | const char *symname) | |
1507 | { | |
1508 | int status, l, credits; | |
1509 | u64 newsize; | |
1510 | struct ocfs2_super *osb = NULL; | |
1511 | struct inode *inode = NULL; | |
1512 | struct super_block *sb; | |
1513 | struct buffer_head *new_fe_bh = NULL; | |
1514 | struct buffer_head *de_bh = NULL; | |
1515 | struct buffer_head *parent_fe_bh = NULL; | |
1516 | struct ocfs2_dinode *fe = NULL; | |
1517 | struct ocfs2_dinode *dirfe; | |
1fabe148 | 1518 | handle_t *handle = NULL; |
ccd979bd MF |
1519 | struct ocfs2_alloc_context *inode_ac = NULL; |
1520 | struct ocfs2_alloc_context *data_ac = NULL; | |
1521 | ||
1522 | mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir, | |
1523 | dentry, symname, dentry->d_name.len, dentry->d_name.name); | |
1524 | ||
1525 | sb = dir->i_sb; | |
1526 | osb = OCFS2_SB(sb); | |
1527 | ||
1528 | l = strlen(symname) + 1; | |
1529 | ||
1530 | credits = ocfs2_calc_symlink_credits(sb); | |
1531 | ||
ccd979bd | 1532 | /* lock the parent directory */ |
e63aecb6 | 1533 | status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); |
ccd979bd MF |
1534 | if (status < 0) { |
1535 | if (status != -ENOENT) | |
1536 | mlog_errno(status); | |
6d8fc40e | 1537 | return status; |
ccd979bd MF |
1538 | } |
1539 | ||
1540 | dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; | |
1541 | if (!dirfe->i_links_count) { | |
1542 | /* can't make a file in a deleted directory. */ | |
1543 | status = -ENOENT; | |
1544 | goto bail; | |
1545 | } | |
1546 | ||
1547 | status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, | |
1548 | dentry->d_name.len); | |
1549 | if (status) | |
1550 | goto bail; | |
1551 | ||
1552 | status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, | |
1553 | dentry->d_name.name, | |
1554 | dentry->d_name.len, &de_bh); | |
1555 | if (status < 0) { | |
1556 | mlog_errno(status); | |
1557 | goto bail; | |
1558 | } | |
1559 | ||
da5cbf2f | 1560 | status = ocfs2_reserve_new_inode(osb, &inode_ac); |
ccd979bd MF |
1561 | if (status < 0) { |
1562 | if (status != -ENOSPC) | |
1563 | mlog_errno(status); | |
1564 | goto bail; | |
1565 | } | |
1566 | ||
1567 | /* don't reserve bitmap space for fast symlinks. */ | |
1568 | if (l > ocfs2_fast_symlink_chars(sb)) { | |
da5cbf2f | 1569 | status = ocfs2_reserve_clusters(osb, 1, &data_ac); |
ccd979bd MF |
1570 | if (status < 0) { |
1571 | if (status != -ENOSPC) | |
1572 | mlog_errno(status); | |
1573 | goto bail; | |
1574 | } | |
1575 | } | |
1576 | ||
65eff9cc | 1577 | handle = ocfs2_start_trans(osb, credits); |
ccd979bd MF |
1578 | if (IS_ERR(handle)) { |
1579 | status = PTR_ERR(handle); | |
1580 | handle = NULL; | |
1581 | mlog_errno(status); | |
1582 | goto bail; | |
1583 | } | |
1584 | ||
1585 | status = ocfs2_mknod_locked(osb, dir, dentry, | |
1586 | S_IFLNK | S_IRWXUGO, 0, | |
1587 | &new_fe_bh, parent_fe_bh, handle, | |
1588 | &inode, inode_ac); | |
1589 | if (status < 0) { | |
1590 | mlog_errno(status); | |
1591 | goto bail; | |
1592 | } | |
1593 | ||
1594 | fe = (struct ocfs2_dinode *) new_fe_bh->b_data; | |
1595 | inode->i_rdev = 0; | |
1596 | newsize = l - 1; | |
1597 | if (l > ocfs2_fast_symlink_chars(sb)) { | |
dcd0538f MF |
1598 | u32 offset = 0; |
1599 | ||
ccd979bd | 1600 | inode->i_op = &ocfs2_symlink_inode_operations; |
2ae99a60 | 1601 | status = ocfs2_do_extend_allocation(osb, inode, &offset, 1, 0, |
dcd0538f | 1602 | new_fe_bh, |
ccd979bd MF |
1603 | handle, data_ac, NULL, |
1604 | NULL); | |
1605 | if (status < 0) { | |
1606 | if (status != -ENOSPC && status != -EINTR) { | |
b0697053 MF |
1607 | mlog(ML_ERROR, |
1608 | "Failed to extend file to %llu\n", | |
1609 | (unsigned long long)newsize); | |
ccd979bd MF |
1610 | mlog_errno(status); |
1611 | status = -ENOSPC; | |
1612 | } | |
1613 | goto bail; | |
1614 | } | |
1615 | i_size_write(inode, newsize); | |
8110b073 | 1616 | inode->i_blocks = ocfs2_inode_sector_count(inode); |
ccd979bd MF |
1617 | } else { |
1618 | inode->i_op = &ocfs2_fast_symlink_inode_operations; | |
1619 | memcpy((char *) fe->id2.i_symlink, symname, l); | |
1620 | i_size_write(inode, newsize); | |
1621 | inode->i_blocks = 0; | |
1622 | } | |
1623 | ||
1624 | status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); | |
1625 | if (status < 0) { | |
1626 | mlog_errno(status); | |
1627 | goto bail; | |
1628 | } | |
1629 | ||
1630 | if (!ocfs2_inode_is_fast_symlink(inode)) { | |
1631 | status = ocfs2_create_symlink_data(osb, handle, inode, | |
1632 | symname); | |
1633 | if (status < 0) { | |
1634 | mlog_errno(status); | |
1635 | goto bail; | |
1636 | } | |
1637 | } | |
1638 | ||
1639 | status = ocfs2_add_entry(handle, dentry, inode, | |
1640 | le64_to_cpu(fe->i_blkno), parent_fe_bh, | |
1641 | de_bh); | |
1642 | if (status < 0) { | |
1643 | mlog_errno(status); | |
1644 | goto bail; | |
1645 | } | |
1646 | ||
0027dd5b | 1647 | status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); |
379dfe9d MF |
1648 | if (status) { |
1649 | mlog_errno(status); | |
1650 | goto bail; | |
1651 | } | |
1652 | ||
ccd979bd MF |
1653 | insert_inode_hash(inode); |
1654 | dentry->d_op = &ocfs2_dentry_ops; | |
1655 | d_instantiate(dentry, inode); | |
1656 | bail: | |
1657 | if (handle) | |
02dc1af4 | 1658 | ocfs2_commit_trans(osb, handle); |
6d8fc40e | 1659 | |
e63aecb6 | 1660 | ocfs2_inode_unlock(dir, 1); |
6d8fc40e | 1661 | |
ccd979bd MF |
1662 | if (new_fe_bh) |
1663 | brelse(new_fe_bh); | |
1664 | if (parent_fe_bh) | |
1665 | brelse(parent_fe_bh); | |
1666 | if (de_bh) | |
1667 | brelse(de_bh); | |
1668 | if (inode_ac) | |
1669 | ocfs2_free_alloc_context(inode_ac); | |
1670 | if (data_ac) | |
1671 | ocfs2_free_alloc_context(data_ac); | |
1672 | if ((status < 0) && inode) | |
1673 | iput(inode); | |
1674 | ||
1675 | mlog_exit(status); | |
1676 | ||
1677 | return status; | |
1678 | } | |
1679 | ||
ccd979bd MF |
1680 | static int ocfs2_blkno_stringify(u64 blkno, char *name) |
1681 | { | |
1682 | int status, namelen; | |
1683 | ||
1684 | mlog_entry_void(); | |
1685 | ||
b0697053 MF |
1686 | namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", |
1687 | (long long)blkno); | |
ccd979bd MF |
1688 | if (namelen <= 0) { |
1689 | if (namelen) | |
1690 | status = namelen; | |
1691 | else | |
1692 | status = -EINVAL; | |
1693 | mlog_errno(status); | |
1694 | goto bail; | |
1695 | } | |
1696 | if (namelen != OCFS2_ORPHAN_NAMELEN) { | |
1697 | status = -EINVAL; | |
1698 | mlog_errno(status); | |
1699 | goto bail; | |
1700 | } | |
1701 | ||
1702 | mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name, | |
1703 | namelen); | |
1704 | ||
1705 | status = 0; | |
1706 | bail: | |
1707 | mlog_exit(status); | |
1708 | return status; | |
1709 | } | |
1710 | ||
1711 | static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, | |
5098c27b | 1712 | struct inode **ret_orphan_dir, |
ccd979bd MF |
1713 | struct inode *inode, |
1714 | char *name, | |
1715 | struct buffer_head **de_bh) | |
1716 | { | |
5098c27b | 1717 | struct inode *orphan_dir_inode; |
ccd979bd MF |
1718 | struct buffer_head *orphan_dir_bh = NULL; |
1719 | int status = 0; | |
1720 | ||
1721 | status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); | |
1722 | if (status < 0) { | |
1723 | mlog_errno(status); | |
5098c27b | 1724 | return status; |
ccd979bd MF |
1725 | } |
1726 | ||
1727 | orphan_dir_inode = ocfs2_get_system_file_inode(osb, | |
1728 | ORPHAN_DIR_SYSTEM_INODE, | |
1729 | osb->slot_num); | |
1730 | if (!orphan_dir_inode) { | |
1731 | status = -ENOENT; | |
1732 | mlog_errno(status); | |
5098c27b | 1733 | return status; |
ccd979bd MF |
1734 | } |
1735 | ||
5098c27b MF |
1736 | mutex_lock(&orphan_dir_inode->i_mutex); |
1737 | ||
e63aecb6 | 1738 | status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); |
ccd979bd MF |
1739 | if (status < 0) { |
1740 | mlog_errno(status); | |
1741 | goto leave; | |
1742 | } | |
1743 | ||
1744 | status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, | |
1745 | orphan_dir_bh, name, | |
1746 | OCFS2_ORPHAN_NAMELEN, de_bh); | |
1747 | if (status < 0) { | |
e63aecb6 | 1748 | ocfs2_inode_unlock(orphan_dir_inode, 1); |
5098c27b | 1749 | |
ccd979bd MF |
1750 | mlog_errno(status); |
1751 | goto leave; | |
1752 | } | |
1753 | ||
5098c27b MF |
1754 | *ret_orphan_dir = orphan_dir_inode; |
1755 | ||
ccd979bd | 1756 | leave: |
5098c27b MF |
1757 | if (status) { |
1758 | mutex_unlock(&orphan_dir_inode->i_mutex); | |
ccd979bd | 1759 | iput(orphan_dir_inode); |
5098c27b | 1760 | } |
ccd979bd MF |
1761 | |
1762 | if (orphan_dir_bh) | |
1763 | brelse(orphan_dir_bh); | |
1764 | ||
1765 | mlog_exit(status); | |
1766 | return status; | |
1767 | } | |
1768 | ||
1769 | static int ocfs2_orphan_add(struct ocfs2_super *osb, | |
1fabe148 | 1770 | handle_t *handle, |
ccd979bd MF |
1771 | struct inode *inode, |
1772 | struct ocfs2_dinode *fe, | |
1773 | char *name, | |
5098c27b MF |
1774 | struct buffer_head *de_bh, |
1775 | struct inode *orphan_dir_inode) | |
ccd979bd | 1776 | { |
ccd979bd MF |
1777 | struct buffer_head *orphan_dir_bh = NULL; |
1778 | int status = 0; | |
1779 | struct ocfs2_dinode *orphan_fe; | |
1780 | ||
1781 | mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino); | |
1782 | ||
ccd979bd MF |
1783 | status = ocfs2_read_block(osb, |
1784 | OCFS2_I(orphan_dir_inode)->ip_blkno, | |
1785 | &orphan_dir_bh, OCFS2_BH_CACHED, | |
1786 | orphan_dir_inode); | |
1787 | if (status < 0) { | |
1788 | mlog_errno(status); | |
1789 | goto leave; | |
1790 | } | |
1791 | ||
1792 | status = ocfs2_journal_access(handle, orphan_dir_inode, orphan_dir_bh, | |
1793 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1794 | if (status < 0) { | |
1795 | mlog_errno(status); | |
1796 | goto leave; | |
1797 | } | |
1798 | ||
1799 | /* we're a cluster, and nlink can change on disk from | |
1800 | * underneath us... */ | |
1801 | orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; | |
1802 | if (S_ISDIR(inode->i_mode)) | |
1803 | le16_add_cpu(&orphan_fe->i_links_count, 1); | |
1804 | orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count); | |
1805 | ||
1806 | status = ocfs2_journal_dirty(handle, orphan_dir_bh); | |
1807 | if (status < 0) { | |
1808 | mlog_errno(status); | |
1809 | goto leave; | |
1810 | } | |
1811 | ||
1812 | status = __ocfs2_add_entry(handle, orphan_dir_inode, name, | |
1813 | OCFS2_ORPHAN_NAMELEN, inode, | |
1814 | OCFS2_I(inode)->ip_blkno, | |
1815 | orphan_dir_bh, de_bh); | |
1816 | if (status < 0) { | |
1817 | mlog_errno(status); | |
1818 | goto leave; | |
1819 | } | |
1820 | ||
1821 | le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL); | |
1822 | ||
1823 | /* Record which orphan dir our inode now resides | |
1824 | * in. delete_inode will use this to determine which orphan | |
1825 | * dir to lock. */ | |
50008630 | 1826 | fe->i_orphaned_slot = cpu_to_le16(osb->slot_num); |
ccd979bd | 1827 | |
b0697053 MF |
1828 | mlog(0, "Inode %llu orphaned in slot %d\n", |
1829 | (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num); | |
ccd979bd MF |
1830 | |
1831 | leave: | |
ccd979bd MF |
1832 | if (orphan_dir_bh) |
1833 | brelse(orphan_dir_bh); | |
1834 | ||
1835 | mlog_exit(status); | |
1836 | return status; | |
1837 | } | |
1838 | ||
1839 | /* unlike orphan_add, we expect the orphan dir to already be locked here. */ | |
1840 | int ocfs2_orphan_del(struct ocfs2_super *osb, | |
1fabe148 | 1841 | handle_t *handle, |
ccd979bd MF |
1842 | struct inode *orphan_dir_inode, |
1843 | struct inode *inode, | |
1844 | struct buffer_head *orphan_dir_bh) | |
1845 | { | |
1846 | char name[OCFS2_ORPHAN_NAMELEN + 1]; | |
1847 | struct ocfs2_dinode *orphan_fe; | |
1848 | int status = 0; | |
1849 | struct buffer_head *target_de_bh = NULL; | |
1850 | struct ocfs2_dir_entry *target_de = NULL; | |
1851 | ||
1852 | mlog_entry_void(); | |
1853 | ||
1854 | status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); | |
1855 | if (status < 0) { | |
1856 | mlog_errno(status); | |
1857 | goto leave; | |
1858 | } | |
1859 | ||
b0697053 MF |
1860 | mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n", |
1861 | name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, | |
1862 | OCFS2_ORPHAN_NAMELEN); | |
ccd979bd MF |
1863 | |
1864 | /* find it's spot in the orphan directory */ | |
1865 | target_de_bh = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, | |
1866 | orphan_dir_inode, &target_de); | |
1867 | if (!target_de_bh) { | |
1868 | status = -ENOENT; | |
1869 | mlog_errno(status); | |
1870 | goto leave; | |
1871 | } | |
1872 | ||
1873 | /* remove it from the orphan directory */ | |
1874 | status = ocfs2_delete_entry(handle, orphan_dir_inode, target_de, | |
1875 | target_de_bh); | |
1876 | if (status < 0) { | |
1877 | mlog_errno(status); | |
1878 | goto leave; | |
1879 | } | |
1880 | ||
1881 | status = ocfs2_journal_access(handle,orphan_dir_inode, orphan_dir_bh, | |
1882 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1883 | if (status < 0) { | |
1884 | mlog_errno(status); | |
1885 | goto leave; | |
1886 | } | |
1887 | ||
1888 | /* do the i_nlink dance! :) */ | |
1889 | orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; | |
1890 | if (S_ISDIR(inode->i_mode)) | |
1891 | le16_add_cpu(&orphan_fe->i_links_count, -1); | |
1892 | orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count); | |
1893 | ||
1894 | status = ocfs2_journal_dirty(handle, orphan_dir_bh); | |
1895 | if (status < 0) { | |
1896 | mlog_errno(status); | |
1897 | goto leave; | |
1898 | } | |
1899 | ||
1900 | leave: | |
1901 | if (target_de_bh) | |
1902 | brelse(target_de_bh); | |
1903 | ||
1904 | mlog_exit(status); | |
1905 | return status; | |
1906 | } | |
1907 | ||
92e1d5be | 1908 | const struct inode_operations ocfs2_dir_iops = { |
ccd979bd MF |
1909 | .create = ocfs2_create, |
1910 | .lookup = ocfs2_lookup, | |
1911 | .link = ocfs2_link, | |
1912 | .unlink = ocfs2_unlink, | |
1913 | .rmdir = ocfs2_unlink, | |
1914 | .symlink = ocfs2_symlink, | |
1915 | .mkdir = ocfs2_mkdir, | |
1916 | .mknod = ocfs2_mknod, | |
1917 | .rename = ocfs2_rename, | |
1918 | .setattr = ocfs2_setattr, | |
1919 | .getattr = ocfs2_getattr, | |
d38eb8db | 1920 | .permission = ocfs2_permission, |
ccd979bd | 1921 | }; |