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ccd979bd MF |
1 | /* -*- mode: c; c-basic-offset: 8; -*- |
2 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
3 | * | |
4 | * namei.c | |
5 | * | |
6 | * Create and rename file, directory, symlinks | |
7 | * | |
8 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. | |
9 | * | |
10 | * Portions of this code from linux/fs/ext3/dir.c | |
11 | * | |
12 | * Copyright (C) 1992, 1993, 1994, 1995 | |
13 | * Remy Card (card@masi.ibp.fr) | |
14 | * Laboratoire MASI - Institut Blaise pascal | |
15 | * Universite Pierre et Marie Curie (Paris VI) | |
16 | * | |
17 | * from | |
18 | * | |
19 | * linux/fs/minix/dir.c | |
20 | * | |
21 | * Copyright (C) 1991, 1992 Linux Torvalds | |
22 | * | |
23 | * This program is free software; you can redistribute it and/or | |
24 | * modify it under the terms of the GNU General Public | |
25 | * License as published by the Free Software Foundation; either | |
26 | * version 2 of the License, or (at your option) any later version. | |
27 | * | |
28 | * This program is distributed in the hope that it will be useful, | |
29 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
30 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
31 | * General Public License for more details. | |
32 | * | |
33 | * You should have received a copy of the GNU General Public | |
34 | * License along with this program; if not, write to the | |
35 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
36 | * Boston, MA 021110-1307, USA. | |
37 | */ | |
38 | ||
39 | #include <linux/fs.h> | |
40 | #include <linux/types.h> | |
41 | #include <linux/slab.h> | |
42 | #include <linux/highmem.h> | |
43 | ||
44 | #define MLOG_MASK_PREFIX ML_NAMEI | |
45 | #include <cluster/masklog.h> | |
46 | ||
47 | #include "ocfs2.h" | |
48 | ||
49 | #include "alloc.h" | |
50 | #include "dcache.h" | |
51 | #include "dir.h" | |
52 | #include "dlmglue.h" | |
53 | #include "extent_map.h" | |
54 | #include "file.h" | |
55 | #include "inode.h" | |
56 | #include "journal.h" | |
57 | #include "namei.h" | |
58 | #include "suballoc.h" | |
aa958874 | 59 | #include "super.h" |
ccd979bd MF |
60 | #include "symlink.h" |
61 | #include "sysfile.h" | |
62 | #include "uptodate.h" | |
63 | #include "vote.h" | |
64 | ||
65 | #include "buffer_head_io.h" | |
66 | ||
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; | |
104 | struct buffer_head *dirent_bh = NULL; | |
105 | struct inode *inode = NULL; | |
106 | struct dentry *ret; | |
107 | struct ocfs2_dir_entry *dirent; | |
108 | struct ocfs2_inode_info *oi; | |
109 | ||
110 | mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry, | |
111 | dentry->d_name.len, dentry->d_name.name); | |
112 | ||
113 | if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) { | |
114 | ret = ERR_PTR(-ENAMETOOLONG); | |
115 | goto bail; | |
116 | } | |
117 | ||
b0697053 MF |
118 | mlog(0, "find name %.*s in directory %llu\n", dentry->d_name.len, |
119 | dentry->d_name.name, (unsigned long long)OCFS2_I(dir)->ip_blkno); | |
ccd979bd | 120 | |
4bcec184 | 121 | status = ocfs2_meta_lock(dir, NULL, 0); |
ccd979bd MF |
122 | if (status < 0) { |
123 | if (status != -ENOENT) | |
124 | mlog_errno(status); | |
125 | ret = ERR_PTR(status); | |
126 | goto bail; | |
127 | } | |
128 | ||
129 | status = ocfs2_find_files_on_disk(dentry->d_name.name, | |
130 | dentry->d_name.len, &blkno, | |
131 | dir, &dirent_bh, &dirent); | |
132 | if (status < 0) | |
133 | goto bail_add; | |
134 | ||
24c19ef4 | 135 | inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0); |
ccd979bd | 136 | if (IS_ERR(inode)) { |
ccd979bd MF |
137 | ret = ERR_PTR(-EACCES); |
138 | goto bail_unlock; | |
139 | } | |
140 | ||
141 | oi = OCFS2_I(inode); | |
142 | /* Clear any orphaned state... If we were able to look up the | |
143 | * inode from a directory, it certainly can't be orphaned. We | |
144 | * might have the bad state from a node which intended to | |
145 | * orphan this inode but crashed before it could commit the | |
146 | * unlink. */ | |
147 | spin_lock(&oi->ip_lock); | |
148 | oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED; | |
ccd979bd MF |
149 | spin_unlock(&oi->ip_lock); |
150 | ||
151 | bail_add: | |
ccd979bd MF |
152 | dentry->d_op = &ocfs2_dentry_ops; |
153 | ret = d_splice_alias(inode, dentry); | |
154 | ||
379dfe9d MF |
155 | if (inode) { |
156 | /* | |
157 | * If d_splice_alias() finds a DCACHE_DISCONNECTED | |
158 | * dentry, it will d_move() it on top of ourse. The | |
159 | * return value will indicate this however, so in | |
160 | * those cases, we switch them around for the locking | |
161 | * code. | |
162 | * | |
163 | * NOTE: This dentry already has ->d_op set from | |
164 | * ocfs2_get_parent() and ocfs2_get_dentry() | |
165 | */ | |
166 | if (ret) | |
167 | dentry = ret; | |
168 | ||
169 | status = ocfs2_dentry_attach_lock(dentry, inode, | |
0027dd5b | 170 | OCFS2_I(dir)->ip_blkno); |
379dfe9d MF |
171 | if (status) { |
172 | mlog_errno(status); | |
173 | ret = ERR_PTR(status); | |
174 | goto bail_unlock; | |
175 | } | |
176 | } | |
177 | ||
ccd979bd MF |
178 | bail_unlock: |
179 | /* Don't drop the cluster lock until *after* the d_add -- | |
180 | * unlink on another node will message us to remove that | |
181 | * dentry under this lock so otherwise we can race this with | |
182 | * the vote thread and have a stale dentry. */ | |
183 | ocfs2_meta_unlock(dir, 0); | |
184 | ||
185 | bail: | |
186 | if (dirent_bh) | |
187 | brelse(dirent_bh); | |
188 | ||
189 | mlog_exit_ptr(ret); | |
190 | ||
191 | return ret; | |
192 | } | |
193 | ||
ccd979bd MF |
194 | static int ocfs2_mknod(struct inode *dir, |
195 | struct dentry *dentry, | |
196 | int mode, | |
197 | dev_t dev) | |
198 | { | |
199 | int status = 0; | |
200 | struct buffer_head *parent_fe_bh = NULL; | |
1fabe148 | 201 | handle_t *handle = NULL; |
ccd979bd MF |
202 | struct ocfs2_super *osb; |
203 | struct ocfs2_dinode *dirfe; | |
204 | struct buffer_head *new_fe_bh = NULL; | |
205 | struct buffer_head *de_bh = NULL; | |
206 | struct inode *inode = NULL; | |
207 | struct ocfs2_alloc_context *inode_ac = NULL; | |
208 | struct ocfs2_alloc_context *data_ac = NULL; | |
209 | ||
210 | mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode, | |
211 | (unsigned long)dev, dentry->d_name.len, | |
212 | dentry->d_name.name); | |
213 | ||
214 | /* get our super block */ | |
215 | osb = OCFS2_SB(dir->i_sb); | |
216 | ||
4bcec184 | 217 | status = ocfs2_meta_lock(dir, &parent_fe_bh, 1); |
e3a82138 MF |
218 | if (status < 0) { |
219 | if (status != -ENOENT) | |
220 | mlog_errno(status); | |
221 | return status; | |
222 | } | |
223 | ||
a663e305 MF |
224 | if (S_ISDIR(mode) && (dir->i_nlink >= OCFS2_LINK_MAX)) { |
225 | status = -EMLINK; | |
226 | goto leave; | |
227 | } | |
228 | ||
ccd979bd MF |
229 | dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; |
230 | if (!dirfe->i_links_count) { | |
231 | /* can't make a file in a deleted directory. */ | |
232 | status = -ENOENT; | |
233 | goto leave; | |
234 | } | |
235 | ||
236 | status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, | |
237 | dentry->d_name.len); | |
238 | if (status) | |
239 | goto leave; | |
240 | ||
241 | /* get a spot inside the dir. */ | |
242 | status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, | |
243 | dentry->d_name.name, | |
244 | dentry->d_name.len, &de_bh); | |
245 | if (status < 0) { | |
246 | mlog_errno(status); | |
247 | goto leave; | |
248 | } | |
249 | ||
250 | /* reserve an inode spot */ | |
da5cbf2f | 251 | status = ocfs2_reserve_new_inode(osb, &inode_ac); |
ccd979bd MF |
252 | if (status < 0) { |
253 | if (status != -ENOSPC) | |
254 | mlog_errno(status); | |
255 | goto leave; | |
256 | } | |
257 | ||
258 | /* are we making a directory? If so, reserve a cluster for his | |
259 | * 1st extent. */ | |
260 | if (S_ISDIR(mode)) { | |
da5cbf2f | 261 | status = ocfs2_reserve_clusters(osb, 1, &data_ac); |
ccd979bd MF |
262 | if (status < 0) { |
263 | if (status != -ENOSPC) | |
264 | mlog_errno(status); | |
265 | goto leave; | |
266 | } | |
267 | } | |
268 | ||
65eff9cc | 269 | handle = ocfs2_start_trans(osb, OCFS2_MKNOD_CREDITS); |
ccd979bd MF |
270 | if (IS_ERR(handle)) { |
271 | status = PTR_ERR(handle); | |
272 | handle = NULL; | |
273 | mlog_errno(status); | |
274 | goto leave; | |
275 | } | |
276 | ||
277 | /* do the real work now. */ | |
278 | status = ocfs2_mknod_locked(osb, dir, dentry, mode, dev, | |
279 | &new_fe_bh, parent_fe_bh, handle, | |
280 | &inode, inode_ac); | |
281 | if (status < 0) { | |
282 | mlog_errno(status); | |
283 | goto leave; | |
284 | } | |
285 | ||
286 | if (S_ISDIR(mode)) { | |
287 | status = ocfs2_fill_new_dir(osb, handle, dir, inode, | |
288 | new_fe_bh, data_ac); | |
289 | if (status < 0) { | |
290 | mlog_errno(status); | |
291 | goto leave; | |
292 | } | |
293 | ||
294 | status = ocfs2_journal_access(handle, dir, parent_fe_bh, | |
295 | OCFS2_JOURNAL_ACCESS_WRITE); | |
296 | if (status < 0) { | |
297 | mlog_errno(status); | |
298 | goto leave; | |
299 | } | |
300 | le16_add_cpu(&dirfe->i_links_count, 1); | |
301 | status = ocfs2_journal_dirty(handle, parent_fe_bh); | |
302 | if (status < 0) { | |
303 | mlog_errno(status); | |
304 | goto leave; | |
305 | } | |
d8c76e6f | 306 | inc_nlink(dir); |
ccd979bd MF |
307 | } |
308 | ||
309 | status = ocfs2_add_entry(handle, dentry, inode, | |
310 | OCFS2_I(inode)->ip_blkno, parent_fe_bh, | |
311 | de_bh); | |
312 | if (status < 0) { | |
313 | mlog_errno(status); | |
314 | goto leave; | |
315 | } | |
316 | ||
379dfe9d | 317 | status = ocfs2_dentry_attach_lock(dentry, inode, |
0027dd5b | 318 | OCFS2_I(dir)->ip_blkno); |
379dfe9d MF |
319 | if (status) { |
320 | mlog_errno(status); | |
321 | goto leave; | |
322 | } | |
323 | ||
ccd979bd MF |
324 | insert_inode_hash(inode); |
325 | dentry->d_op = &ocfs2_dentry_ops; | |
326 | d_instantiate(dentry, inode); | |
327 | status = 0; | |
328 | leave: | |
329 | if (handle) | |
02dc1af4 | 330 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 331 | |
e3a82138 MF |
332 | ocfs2_meta_unlock(dir, 1); |
333 | ||
ccd979bd MF |
334 | if (status == -ENOSPC) |
335 | mlog(0, "Disk is full\n"); | |
336 | ||
337 | if (new_fe_bh) | |
338 | brelse(new_fe_bh); | |
339 | ||
340 | if (de_bh) | |
341 | brelse(de_bh); | |
342 | ||
343 | if (parent_fe_bh) | |
344 | brelse(parent_fe_bh); | |
345 | ||
346 | if ((status < 0) && inode) | |
347 | iput(inode); | |
348 | ||
349 | if (inode_ac) | |
350 | ocfs2_free_alloc_context(inode_ac); | |
351 | ||
352 | if (data_ac) | |
353 | ocfs2_free_alloc_context(data_ac); | |
354 | ||
355 | mlog_exit(status); | |
356 | ||
357 | return status; | |
358 | } | |
359 | ||
360 | static int ocfs2_mknod_locked(struct ocfs2_super *osb, | |
361 | struct inode *dir, | |
362 | struct dentry *dentry, int mode, | |
363 | dev_t dev, | |
364 | struct buffer_head **new_fe_bh, | |
365 | struct buffer_head *parent_fe_bh, | |
1fabe148 | 366 | handle_t *handle, |
ccd979bd MF |
367 | struct inode **ret_inode, |
368 | struct ocfs2_alloc_context *inode_ac) | |
369 | { | |
370 | int status = 0; | |
371 | struct ocfs2_dinode *fe = NULL; | |
372 | struct ocfs2_extent_list *fel; | |
373 | u64 fe_blkno = 0; | |
374 | u16 suballoc_bit; | |
375 | struct inode *inode = NULL; | |
376 | ||
377 | mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode, | |
378 | (unsigned long)dev, dentry->d_name.len, | |
379 | dentry->d_name.name); | |
380 | ||
381 | *new_fe_bh = NULL; | |
382 | *ret_inode = NULL; | |
383 | ||
384 | status = ocfs2_claim_new_inode(osb, handle, inode_ac, &suballoc_bit, | |
385 | &fe_blkno); | |
386 | if (status < 0) { | |
387 | mlog_errno(status); | |
388 | goto leave; | |
389 | } | |
390 | ||
391 | inode = new_inode(dir->i_sb); | |
392 | if (IS_ERR(inode)) { | |
393 | status = PTR_ERR(inode); | |
394 | mlog(ML_ERROR, "new_inode failed!\n"); | |
395 | goto leave; | |
396 | } | |
397 | ||
398 | /* populate as many fields early on as possible - many of | |
399 | * these are used by the support functions here and in | |
400 | * callers. */ | |
401 | inode->i_ino = ino_from_blkno(osb->sb, fe_blkno); | |
402 | OCFS2_I(inode)->ip_blkno = fe_blkno; | |
403 | if (S_ISDIR(mode)) | |
404 | inode->i_nlink = 2; | |
405 | else | |
406 | inode->i_nlink = 1; | |
407 | inode->i_mode = mode; | |
408 | spin_lock(&osb->osb_lock); | |
409 | inode->i_generation = osb->s_next_generation++; | |
410 | spin_unlock(&osb->osb_lock); | |
411 | ||
412 | *new_fe_bh = sb_getblk(osb->sb, fe_blkno); | |
413 | if (!*new_fe_bh) { | |
414 | status = -EIO; | |
415 | mlog_errno(status); | |
416 | goto leave; | |
417 | } | |
418 | ocfs2_set_new_buffer_uptodate(inode, *new_fe_bh); | |
419 | ||
420 | status = ocfs2_journal_access(handle, inode, *new_fe_bh, | |
421 | OCFS2_JOURNAL_ACCESS_CREATE); | |
422 | if (status < 0) { | |
423 | mlog_errno(status); | |
424 | goto leave; | |
425 | } | |
426 | ||
427 | fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data; | |
428 | memset(fe, 0, osb->sb->s_blocksize); | |
429 | ||
430 | fe->i_generation = cpu_to_le32(inode->i_generation); | |
431 | fe->i_fs_generation = cpu_to_le32(osb->fs_generation); | |
432 | fe->i_blkno = cpu_to_le64(fe_blkno); | |
433 | fe->i_suballoc_bit = cpu_to_le16(suballoc_bit); | |
434 | fe->i_suballoc_slot = cpu_to_le16(osb->slot_num); | |
435 | fe->i_uid = cpu_to_le32(current->fsuid); | |
436 | if (dir->i_mode & S_ISGID) { | |
437 | fe->i_gid = cpu_to_le32(dir->i_gid); | |
438 | if (S_ISDIR(mode)) | |
439 | mode |= S_ISGID; | |
440 | } else | |
441 | fe->i_gid = cpu_to_le32(current->fsgid); | |
442 | fe->i_mode = cpu_to_le16(mode); | |
443 | if (S_ISCHR(mode) || S_ISBLK(mode)) | |
444 | fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev)); | |
445 | ||
446 | fe->i_links_count = cpu_to_le16(inode->i_nlink); | |
447 | ||
448 | fe->i_last_eb_blk = 0; | |
449 | strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE); | |
450 | le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL); | |
451 | fe->i_atime = fe->i_ctime = fe->i_mtime = | |
452 | cpu_to_le64(CURRENT_TIME.tv_sec); | |
453 | fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = | |
454 | cpu_to_le32(CURRENT_TIME.tv_nsec); | |
455 | fe->i_dtime = 0; | |
456 | ||
457 | fel = &fe->id2.i_list; | |
458 | fel->l_tree_depth = 0; | |
459 | fel->l_next_free_rec = 0; | |
460 | fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb)); | |
461 | ||
462 | status = ocfs2_journal_dirty(handle, *new_fe_bh); | |
463 | if (status < 0) { | |
464 | mlog_errno(status); | |
465 | goto leave; | |
466 | } | |
467 | ||
468 | if (ocfs2_populate_inode(inode, fe, 1) < 0) { | |
469 | mlog(ML_ERROR, "populate inode failed! bh->b_blocknr=%llu, " | |
b0697053 | 470 | "i_blkno=%llu, i_ino=%lu\n", |
1ca1a111 MF |
471 | (unsigned long long)(*new_fe_bh)->b_blocknr, |
472 | (unsigned long long)le64_to_cpu(fe->i_blkno), | |
473 | inode->i_ino); | |
ccd979bd MF |
474 | BUG(); |
475 | } | |
476 | ||
477 | ocfs2_inode_set_new(osb, inode); | |
c271c5c2 SM |
478 | if (!ocfs2_mount_local(osb)) { |
479 | status = ocfs2_create_new_inode_locks(inode); | |
480 | if (status < 0) | |
481 | mlog_errno(status); | |
482 | } | |
ccd979bd MF |
483 | |
484 | status = 0; /* error in ocfs2_create_new_inode_locks is not | |
485 | * critical */ | |
486 | ||
487 | *ret_inode = inode; | |
488 | leave: | |
489 | if (status < 0) { | |
490 | if (*new_fe_bh) { | |
491 | brelse(*new_fe_bh); | |
492 | *new_fe_bh = NULL; | |
493 | } | |
494 | if (inode) | |
495 | iput(inode); | |
496 | } | |
497 | ||
498 | mlog_exit(status); | |
499 | return status; | |
500 | } | |
501 | ||
502 | static int ocfs2_mkdir(struct inode *dir, | |
503 | struct dentry *dentry, | |
504 | int mode) | |
505 | { | |
506 | int ret; | |
507 | ||
508 | mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode, | |
509 | dentry->d_name.len, dentry->d_name.name); | |
510 | ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0); | |
511 | mlog_exit(ret); | |
512 | ||
513 | return ret; | |
514 | } | |
515 | ||
516 | static int ocfs2_create(struct inode *dir, | |
517 | struct dentry *dentry, | |
518 | int mode, | |
519 | struct nameidata *nd) | |
520 | { | |
521 | int ret; | |
522 | ||
523 | mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode, | |
524 | dentry->d_name.len, dentry->d_name.name); | |
525 | ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0); | |
526 | mlog_exit(ret); | |
527 | ||
528 | return ret; | |
529 | } | |
530 | ||
531 | static int ocfs2_link(struct dentry *old_dentry, | |
532 | struct inode *dir, | |
533 | struct dentry *dentry) | |
534 | { | |
1fabe148 | 535 | handle_t *handle; |
ccd979bd MF |
536 | struct inode *inode = old_dentry->d_inode; |
537 | int err; | |
538 | struct buffer_head *fe_bh = NULL; | |
539 | struct buffer_head *parent_fe_bh = NULL; | |
540 | struct buffer_head *de_bh = NULL; | |
541 | struct ocfs2_dinode *fe = NULL; | |
542 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
543 | ||
544 | mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino, | |
545 | old_dentry->d_name.len, old_dentry->d_name.name, | |
546 | dentry->d_name.len, dentry->d_name.name); | |
547 | ||
123a9643 MF |
548 | if (S_ISDIR(inode->i_mode)) |
549 | return -EPERM; | |
ccd979bd | 550 | |
4bcec184 | 551 | err = ocfs2_meta_lock(dir, &parent_fe_bh, 1); |
ccd979bd MF |
552 | if (err < 0) { |
553 | if (err != -ENOENT) | |
554 | mlog_errno(err); | |
123a9643 | 555 | return err; |
ccd979bd MF |
556 | } |
557 | ||
0f62de2c TY |
558 | if (!dir->i_nlink) { |
559 | err = -ENOENT; | |
123a9643 | 560 | goto out; |
0f62de2c TY |
561 | } |
562 | ||
ccd979bd MF |
563 | err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, |
564 | dentry->d_name.len); | |
565 | if (err) | |
123a9643 | 566 | goto out; |
ccd979bd MF |
567 | |
568 | err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, | |
569 | dentry->d_name.name, | |
570 | dentry->d_name.len, &de_bh); | |
571 | if (err < 0) { | |
572 | mlog_errno(err); | |
123a9643 | 573 | goto out; |
ccd979bd MF |
574 | } |
575 | ||
4bcec184 | 576 | err = ocfs2_meta_lock(inode, &fe_bh, 1); |
ccd979bd MF |
577 | if (err < 0) { |
578 | if (err != -ENOENT) | |
579 | mlog_errno(err); | |
123a9643 | 580 | goto out; |
ccd979bd MF |
581 | } |
582 | ||
583 | fe = (struct ocfs2_dinode *) fe_bh->b_data; | |
584 | if (le16_to_cpu(fe->i_links_count) >= OCFS2_LINK_MAX) { | |
585 | err = -EMLINK; | |
123a9643 | 586 | goto out_unlock_inode; |
ccd979bd MF |
587 | } |
588 | ||
65eff9cc | 589 | handle = ocfs2_start_trans(osb, OCFS2_LINK_CREDITS); |
ccd979bd MF |
590 | if (IS_ERR(handle)) { |
591 | err = PTR_ERR(handle); | |
592 | handle = NULL; | |
593 | mlog_errno(err); | |
123a9643 | 594 | goto out_unlock_inode; |
ccd979bd MF |
595 | } |
596 | ||
597 | err = ocfs2_journal_access(handle, inode, fe_bh, | |
598 | OCFS2_JOURNAL_ACCESS_WRITE); | |
599 | if (err < 0) { | |
600 | mlog_errno(err); | |
123a9643 | 601 | goto out_commit; |
ccd979bd MF |
602 | } |
603 | ||
d8c76e6f | 604 | inc_nlink(inode); |
ccd979bd MF |
605 | inode->i_ctime = CURRENT_TIME; |
606 | fe->i_links_count = cpu_to_le16(inode->i_nlink); | |
607 | fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
608 | fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
609 | ||
610 | err = ocfs2_journal_dirty(handle, fe_bh); | |
611 | if (err < 0) { | |
612 | le16_add_cpu(&fe->i_links_count, -1); | |
9a53c3a7 | 613 | drop_nlink(inode); |
ccd979bd | 614 | mlog_errno(err); |
123a9643 | 615 | goto out_commit; |
ccd979bd MF |
616 | } |
617 | ||
618 | err = ocfs2_add_entry(handle, dentry, inode, | |
619 | OCFS2_I(inode)->ip_blkno, | |
620 | parent_fe_bh, de_bh); | |
621 | if (err) { | |
622 | le16_add_cpu(&fe->i_links_count, -1); | |
9a53c3a7 | 623 | drop_nlink(inode); |
ccd979bd | 624 | mlog_errno(err); |
123a9643 | 625 | goto out_commit; |
ccd979bd MF |
626 | } |
627 | ||
0027dd5b | 628 | err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); |
379dfe9d MF |
629 | if (err) { |
630 | mlog_errno(err); | |
123a9643 | 631 | goto out_commit; |
379dfe9d MF |
632 | } |
633 | ||
ccd979bd MF |
634 | atomic_inc(&inode->i_count); |
635 | dentry->d_op = &ocfs2_dentry_ops; | |
636 | d_instantiate(dentry, inode); | |
123a9643 MF |
637 | |
638 | out_commit: | |
02dc1af4 | 639 | ocfs2_commit_trans(osb, handle); |
123a9643 MF |
640 | out_unlock_inode: |
641 | ocfs2_meta_unlock(inode, 1); | |
642 | ||
643 | out: | |
644 | ocfs2_meta_unlock(dir, 1); | |
645 | ||
ccd979bd MF |
646 | if (de_bh) |
647 | brelse(de_bh); | |
648 | if (fe_bh) | |
649 | brelse(fe_bh); | |
650 | if (parent_fe_bh) | |
651 | brelse(parent_fe_bh); | |
652 | ||
653 | mlog_exit(err); | |
654 | ||
655 | return err; | |
656 | } | |
657 | ||
379dfe9d MF |
658 | /* |
659 | * Takes and drops an exclusive lock on the given dentry. This will | |
660 | * force other nodes to drop it. | |
661 | */ | |
662 | static int ocfs2_remote_dentry_delete(struct dentry *dentry) | |
663 | { | |
664 | int ret; | |
665 | ||
666 | ret = ocfs2_dentry_lock(dentry, 1); | |
667 | if (ret) | |
668 | mlog_errno(ret); | |
669 | else | |
670 | ocfs2_dentry_unlock(dentry, 1); | |
671 | ||
672 | return ret; | |
673 | } | |
674 | ||
17ff7856 MF |
675 | static inline int inode_is_unlinkable(struct inode *inode) |
676 | { | |
677 | if (S_ISDIR(inode->i_mode)) { | |
678 | if (inode->i_nlink == 2) | |
679 | return 1; | |
680 | return 0; | |
681 | } | |
682 | ||
683 | if (inode->i_nlink == 1) | |
684 | return 1; | |
685 | return 0; | |
686 | } | |
687 | ||
ccd979bd MF |
688 | static int ocfs2_unlink(struct inode *dir, |
689 | struct dentry *dentry) | |
690 | { | |
691 | int status; | |
30a4f5e8 | 692 | int child_locked = 0; |
ccd979bd | 693 | struct inode *inode = dentry->d_inode; |
5098c27b | 694 | struct inode *orphan_dir = NULL; |
ccd979bd MF |
695 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); |
696 | u64 blkno; | |
697 | struct ocfs2_dinode *fe = NULL; | |
698 | struct buffer_head *fe_bh = NULL; | |
699 | struct buffer_head *parent_node_bh = NULL; | |
1fabe148 | 700 | handle_t *handle = NULL; |
ccd979bd MF |
701 | struct ocfs2_dir_entry *dirent = NULL; |
702 | struct buffer_head *dirent_bh = NULL; | |
703 | char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; | |
704 | struct buffer_head *orphan_entry_bh = NULL; | |
705 | ||
706 | mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry, | |
707 | dentry->d_name.len, dentry->d_name.name); | |
708 | ||
709 | BUG_ON(dentry->d_parent->d_inode != dir); | |
710 | ||
b0697053 | 711 | mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno); |
ccd979bd MF |
712 | |
713 | if (inode == osb->root_inode) { | |
714 | mlog(0, "Cannot delete the root directory\n"); | |
30a4f5e8 | 715 | return -EPERM; |
ccd979bd MF |
716 | } |
717 | ||
4bcec184 | 718 | status = ocfs2_meta_lock(dir, &parent_node_bh, 1); |
ccd979bd MF |
719 | if (status < 0) { |
720 | if (status != -ENOENT) | |
721 | mlog_errno(status); | |
30a4f5e8 | 722 | return status; |
ccd979bd MF |
723 | } |
724 | ||
725 | status = ocfs2_find_files_on_disk(dentry->d_name.name, | |
726 | dentry->d_name.len, &blkno, | |
727 | dir, &dirent_bh, &dirent); | |
728 | if (status < 0) { | |
729 | if (status != -ENOENT) | |
730 | mlog_errno(status); | |
731 | goto leave; | |
732 | } | |
733 | ||
734 | if (OCFS2_I(inode)->ip_blkno != blkno) { | |
735 | status = -ENOENT; | |
736 | ||
b0697053 MF |
737 | mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n", |
738 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
739 | (unsigned long long)blkno, OCFS2_I(inode)->ip_flags); | |
ccd979bd MF |
740 | goto leave; |
741 | } | |
742 | ||
4bcec184 | 743 | status = ocfs2_meta_lock(inode, &fe_bh, 1); |
ccd979bd MF |
744 | if (status < 0) { |
745 | if (status != -ENOENT) | |
746 | mlog_errno(status); | |
747 | goto leave; | |
748 | } | |
30a4f5e8 | 749 | child_locked = 1; |
ccd979bd MF |
750 | |
751 | if (S_ISDIR(inode->i_mode)) { | |
752 | if (!ocfs2_empty_dir(inode)) { | |
753 | status = -ENOTEMPTY; | |
754 | goto leave; | |
755 | } else if (inode->i_nlink != 2) { | |
756 | status = -ENOTEMPTY; | |
757 | goto leave; | |
758 | } | |
759 | } | |
760 | ||
379dfe9d | 761 | status = ocfs2_remote_dentry_delete(dentry); |
ccd979bd MF |
762 | if (status < 0) { |
763 | /* This vote should succeed under all normal | |
764 | * circumstances. */ | |
765 | mlog_errno(status); | |
766 | goto leave; | |
767 | } | |
768 | ||
17ff7856 | 769 | if (inode_is_unlinkable(inode)) { |
5098c27b | 770 | status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, inode, |
ccd979bd MF |
771 | orphan_name, |
772 | &orphan_entry_bh); | |
773 | if (status < 0) { | |
774 | mlog_errno(status); | |
775 | goto leave; | |
776 | } | |
777 | } | |
778 | ||
65eff9cc | 779 | handle = ocfs2_start_trans(osb, OCFS2_UNLINK_CREDITS); |
ccd979bd MF |
780 | if (IS_ERR(handle)) { |
781 | status = PTR_ERR(handle); | |
782 | handle = NULL; | |
783 | mlog_errno(status); | |
784 | goto leave; | |
785 | } | |
786 | ||
787 | status = ocfs2_journal_access(handle, inode, fe_bh, | |
788 | OCFS2_JOURNAL_ACCESS_WRITE); | |
789 | if (status < 0) { | |
790 | mlog_errno(status); | |
791 | goto leave; | |
792 | } | |
793 | ||
794 | fe = (struct ocfs2_dinode *) fe_bh->b_data; | |
795 | ||
17ff7856 | 796 | if (inode_is_unlinkable(inode)) { |
ccd979bd | 797 | status = ocfs2_orphan_add(osb, handle, inode, fe, orphan_name, |
5098c27b | 798 | orphan_entry_bh, orphan_dir); |
ccd979bd MF |
799 | if (status < 0) { |
800 | mlog_errno(status); | |
801 | goto leave; | |
802 | } | |
803 | } | |
804 | ||
805 | /* delete the name from the parent dir */ | |
806 | status = ocfs2_delete_entry(handle, dir, dirent, dirent_bh); | |
807 | if (status < 0) { | |
808 | mlog_errno(status); | |
809 | goto leave; | |
810 | } | |
811 | ||
17ff7856 MF |
812 | if (S_ISDIR(inode->i_mode)) |
813 | drop_nlink(inode); | |
814 | drop_nlink(inode); | |
ccd979bd | 815 | fe->i_links_count = cpu_to_le16(inode->i_nlink); |
ccd979bd MF |
816 | |
817 | status = ocfs2_journal_dirty(handle, fe_bh); | |
818 | if (status < 0) { | |
819 | mlog_errno(status); | |
820 | goto leave; | |
821 | } | |
822 | ||
592282cf MF |
823 | dir->i_ctime = dir->i_mtime = CURRENT_TIME; |
824 | if (S_ISDIR(inode->i_mode)) | |
17ff7856 | 825 | drop_nlink(dir); |
592282cf MF |
826 | |
827 | status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh); | |
828 | if (status < 0) { | |
829 | mlog_errno(status); | |
830 | if (S_ISDIR(inode->i_mode)) | |
d8c76e6f | 831 | inc_nlink(dir); |
ccd979bd MF |
832 | } |
833 | ||
834 | leave: | |
ccd979bd | 835 | if (handle) |
02dc1af4 | 836 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 837 | |
30a4f5e8 MF |
838 | if (child_locked) |
839 | ocfs2_meta_unlock(inode, 1); | |
840 | ||
841 | ocfs2_meta_unlock(dir, 1); | |
842 | ||
5098c27b MF |
843 | if (orphan_dir) { |
844 | /* This was locked for us in ocfs2_prepare_orphan_dir() */ | |
845 | ocfs2_meta_unlock(orphan_dir, 1); | |
846 | mutex_unlock(&orphan_dir->i_mutex); | |
847 | iput(orphan_dir); | |
848 | } | |
849 | ||
ccd979bd MF |
850 | if (fe_bh) |
851 | brelse(fe_bh); | |
852 | ||
853 | if (dirent_bh) | |
854 | brelse(dirent_bh); | |
855 | ||
856 | if (parent_node_bh) | |
857 | brelse(parent_node_bh); | |
858 | ||
859 | if (orphan_entry_bh) | |
860 | brelse(orphan_entry_bh); | |
861 | ||
862 | mlog_exit(status); | |
863 | ||
864 | return status; | |
865 | } | |
866 | ||
867 | /* | |
868 | * The only place this should be used is rename! | |
869 | * if they have the same id, then the 1st one is the only one locked. | |
870 | */ | |
871 | static int ocfs2_double_lock(struct ocfs2_super *osb, | |
ccd979bd MF |
872 | struct buffer_head **bh1, |
873 | struct inode *inode1, | |
874 | struct buffer_head **bh2, | |
875 | struct inode *inode2) | |
876 | { | |
877 | int status; | |
878 | struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); | |
879 | struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); | |
880 | struct buffer_head **tmpbh; | |
881 | struct inode *tmpinode; | |
882 | ||
b0697053 MF |
883 | mlog_entry("(inode1 = %llu, inode2 = %llu)\n", |
884 | (unsigned long long)oi1->ip_blkno, | |
885 | (unsigned long long)oi2->ip_blkno); | |
ccd979bd | 886 | |
ccd979bd MF |
887 | if (*bh1) |
888 | *bh1 = NULL; | |
889 | if (*bh2) | |
890 | *bh2 = NULL; | |
891 | ||
892 | /* we always want to lock the one with the lower lockid first. */ | |
893 | if (oi1->ip_blkno != oi2->ip_blkno) { | |
894 | if (oi1->ip_blkno < oi2->ip_blkno) { | |
895 | /* switch id1 and id2 around */ | |
896 | mlog(0, "switching them around...\n"); | |
897 | tmpbh = bh2; | |
898 | bh2 = bh1; | |
899 | bh1 = tmpbh; | |
900 | ||
901 | tmpinode = inode2; | |
902 | inode2 = inode1; | |
903 | inode1 = tmpinode; | |
904 | } | |
905 | /* lock id2 */ | |
4bcec184 | 906 | status = ocfs2_meta_lock(inode2, bh2, 1); |
ccd979bd MF |
907 | if (status < 0) { |
908 | if (status != -ENOENT) | |
909 | mlog_errno(status); | |
910 | goto bail; | |
911 | } | |
912 | } | |
8d5596c6 | 913 | |
ccd979bd | 914 | /* lock id1 */ |
4bcec184 | 915 | status = ocfs2_meta_lock(inode1, bh1, 1); |
ccd979bd | 916 | if (status < 0) { |
8d5596c6 MF |
917 | /* |
918 | * An error return must mean that no cluster locks | |
919 | * were held on function exit. | |
920 | */ | |
921 | if (oi1->ip_blkno != oi2->ip_blkno) | |
922 | ocfs2_meta_unlock(inode2, 1); | |
923 | ||
ccd979bd MF |
924 | if (status != -ENOENT) |
925 | mlog_errno(status); | |
ccd979bd | 926 | } |
8d5596c6 | 927 | |
ccd979bd MF |
928 | bail: |
929 | mlog_exit(status); | |
930 | return status; | |
931 | } | |
932 | ||
8d5596c6 MF |
933 | static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2) |
934 | { | |
935 | ocfs2_meta_unlock(inode1, 1); | |
936 | ||
937 | if (inode1 != inode2) | |
938 | ocfs2_meta_unlock(inode2, 1); | |
939 | } | |
940 | ||
ccd979bd MF |
941 | #define PARENT_INO(buffer) \ |
942 | ((struct ocfs2_dir_entry *) \ | |
943 | ((char *)buffer + \ | |
944 | le16_to_cpu(((struct ocfs2_dir_entry *)buffer)->rec_len)))->inode | |
945 | ||
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; | |
963 | u64 newfe_blkno; | |
1fabe148 | 964 | handle_t *handle = NULL; |
ccd979bd MF |
965 | struct buffer_head *old_dir_bh = NULL; |
966 | struct buffer_head *new_dir_bh = NULL; | |
967 | struct ocfs2_dir_entry *old_de = NULL, *new_de = NULL; // dirent for old_dentry | |
968 | // and new_dentry | |
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)) { | |
ccd979bd MF |
1052 | status = -EIO; |
1053 | old_inode_de_bh = ocfs2_bread(old_inode, 0, &status, 0); | |
1054 | if (!old_inode_de_bh) | |
1055 | goto bail; | |
1056 | ||
1057 | status = -EIO; | |
1058 | if (le64_to_cpu(PARENT_INO(old_inode_de_bh->b_data)) != | |
1059 | OCFS2_I(old_dir)->ip_blkno) | |
1060 | goto bail; | |
1061 | status = -EMLINK; | |
1062 | if (!new_inode && new_dir!=old_dir && | |
1063 | new_dir->i_nlink >= OCFS2_LINK_MAX) | |
1064 | goto bail; | |
ccd979bd MF |
1065 | } |
1066 | ||
1067 | status = -ENOENT; | |
1068 | old_de_bh = ocfs2_find_entry(old_dentry->d_name.name, | |
1069 | old_dentry->d_name.len, | |
1070 | old_dir, &old_de); | |
1071 | if (!old_de_bh) | |
1072 | goto bail; | |
1073 | ||
1074 | /* | |
1075 | * Check for inode number is _not_ due to possible IO errors. | |
1076 | * We might rmdir the source, keep it as pwd of some process | |
1077 | * and merrily kill the link to whatever was created under the | |
1078 | * same name. Goodbye sticky bit ;-< | |
1079 | */ | |
1080 | if (le64_to_cpu(old_de->inode) != OCFS2_I(old_inode)->ip_blkno) | |
1081 | goto bail; | |
1082 | ||
1083 | /* check if the target already exists (in which case we need | |
1084 | * to delete it */ | |
1085 | status = ocfs2_find_files_on_disk(new_dentry->d_name.name, | |
1086 | new_dentry->d_name.len, | |
1087 | &newfe_blkno, new_dir, &new_de_bh, | |
1088 | &new_de); | |
1089 | /* The only error we allow here is -ENOENT because the new | |
1090 | * file not existing is perfectly valid. */ | |
1091 | if ((status < 0) && (status != -ENOENT)) { | |
1092 | /* If we cannot find the file specified we should just */ | |
1093 | /* return the error... */ | |
1094 | mlog_errno(status); | |
1095 | goto bail; | |
1096 | } | |
1097 | ||
1098 | if (!new_de && new_inode) | |
1099 | mlog(ML_ERROR, "inode %lu does not exist in it's parent " | |
1100 | "directory!", new_inode->i_ino); | |
1101 | ||
1102 | /* In case we need to overwrite an existing file, we blow it | |
1103 | * away first */ | |
1104 | if (new_de) { | |
1105 | /* VFS didn't think there existed an inode here, but | |
1106 | * someone else in the cluster must have raced our | |
1107 | * rename to create one. Today we error cleanly, in | |
1108 | * the future we should consider calling iget to build | |
1109 | * a new struct inode for this entry. */ | |
1110 | if (!new_inode) { | |
1111 | status = -EACCES; | |
1112 | ||
1113 | mlog(0, "We found an inode for name %.*s but VFS " | |
1114 | "didn't give us one.\n", new_dentry->d_name.len, | |
1115 | new_dentry->d_name.name); | |
1116 | goto bail; | |
1117 | } | |
1118 | ||
1119 | if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { | |
1120 | status = -EACCES; | |
1121 | ||
b0697053 MF |
1122 | mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n", |
1123 | (unsigned long long)OCFS2_I(new_inode)->ip_blkno, | |
1124 | (unsigned long long)newfe_blkno, | |
ccd979bd MF |
1125 | OCFS2_I(new_inode)->ip_flags); |
1126 | goto bail; | |
1127 | } | |
1128 | ||
4bcec184 | 1129 | status = ocfs2_meta_lock(new_inode, &newfe_bh, 1); |
ccd979bd MF |
1130 | if (status < 0) { |
1131 | if (status != -ENOENT) | |
1132 | mlog_errno(status); | |
1133 | goto bail; | |
1134 | } | |
8d5596c6 | 1135 | new_child_locked = 1; |
ccd979bd | 1136 | |
379dfe9d | 1137 | status = ocfs2_remote_dentry_delete(new_dentry); |
ccd979bd MF |
1138 | if (status < 0) { |
1139 | mlog_errno(status); | |
1140 | goto bail; | |
1141 | } | |
1142 | ||
1143 | newfe = (struct ocfs2_dinode *) newfe_bh->b_data; | |
1144 | ||
b0697053 MF |
1145 | mlog(0, "aha rename over existing... new_de=%p new_blkno=%llu " |
1146 | "newfebh=%p bhblocknr=%llu\n", new_de, | |
1147 | (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? | |
ccd979bd MF |
1148 | (unsigned long long)newfe_bh->b_blocknr : 0ULL); |
1149 | ||
1150 | if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { | |
5098c27b | 1151 | status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, |
ccd979bd MF |
1152 | new_inode, |
1153 | orphan_name, | |
1154 | &orphan_entry_bh); | |
1155 | if (status < 0) { | |
1156 | mlog_errno(status); | |
1157 | goto bail; | |
1158 | } | |
1159 | } | |
1160 | } else { | |
1161 | BUG_ON(new_dentry->d_parent->d_inode != new_dir); | |
1162 | ||
1163 | status = ocfs2_check_dir_for_entry(new_dir, | |
1164 | new_dentry->d_name.name, | |
1165 | new_dentry->d_name.len); | |
1166 | if (status) | |
1167 | goto bail; | |
1168 | ||
1169 | status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, | |
1170 | new_dentry->d_name.name, | |
1171 | new_dentry->d_name.len, | |
1172 | &insert_entry_bh); | |
1173 | if (status < 0) { | |
1174 | mlog_errno(status); | |
1175 | goto bail; | |
1176 | } | |
1177 | } | |
1178 | ||
65eff9cc | 1179 | handle = ocfs2_start_trans(osb, OCFS2_RENAME_CREDITS); |
ccd979bd MF |
1180 | if (IS_ERR(handle)) { |
1181 | status = PTR_ERR(handle); | |
1182 | handle = NULL; | |
1183 | mlog_errno(status); | |
1184 | goto bail; | |
1185 | } | |
1186 | ||
1187 | if (new_de) { | |
1188 | if (S_ISDIR(new_inode->i_mode)) { | |
1189 | if (!ocfs2_empty_dir(new_inode) || | |
1190 | new_inode->i_nlink != 2) { | |
1191 | status = -ENOTEMPTY; | |
1192 | goto bail; | |
1193 | } | |
1194 | } | |
1195 | status = ocfs2_journal_access(handle, new_inode, newfe_bh, | |
1196 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1197 | if (status < 0) { | |
1198 | mlog_errno(status); | |
1199 | goto bail; | |
1200 | } | |
1201 | ||
1202 | if (S_ISDIR(new_inode->i_mode) || | |
1203 | (newfe->i_links_count == cpu_to_le16(1))){ | |
1204 | status = ocfs2_orphan_add(osb, handle, new_inode, | |
1205 | newfe, orphan_name, | |
5098c27b | 1206 | orphan_entry_bh, orphan_dir); |
ccd979bd MF |
1207 | if (status < 0) { |
1208 | mlog_errno(status); | |
1209 | goto bail; | |
1210 | } | |
1211 | } | |
1212 | ||
1213 | /* change the dirent to point to the correct inode */ | |
1214 | status = ocfs2_journal_access(handle, new_dir, new_de_bh, | |
1215 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1216 | if (status < 0) { | |
1217 | mlog_errno(status); | |
1218 | goto bail; | |
1219 | } | |
1220 | new_de->inode = cpu_to_le64(OCFS2_I(old_inode)->ip_blkno); | |
1221 | new_de->file_type = old_de->file_type; | |
1222 | new_dir->i_version++; | |
1223 | status = ocfs2_journal_dirty(handle, new_de_bh); | |
1224 | if (status < 0) { | |
1225 | mlog_errno(status); | |
1226 | goto bail; | |
1227 | } | |
1228 | ||
1229 | if (S_ISDIR(new_inode->i_mode)) | |
1230 | newfe->i_links_count = 0; | |
1231 | else | |
1232 | le16_add_cpu(&newfe->i_links_count, -1); | |
1233 | ||
1234 | status = ocfs2_journal_dirty(handle, newfe_bh); | |
1235 | if (status < 0) { | |
1236 | mlog_errno(status); | |
1237 | goto bail; | |
1238 | } | |
1239 | } else { | |
1240 | /* if the name was not found in new_dir, add it now */ | |
1241 | status = ocfs2_add_entry(handle, new_dentry, old_inode, | |
1242 | OCFS2_I(old_inode)->ip_blkno, | |
1243 | new_dir_bh, insert_entry_bh); | |
1244 | } | |
1245 | ||
1246 | old_inode->i_ctime = CURRENT_TIME; | |
1247 | mark_inode_dirty(old_inode); | |
480214d7 SM |
1248 | |
1249 | status = ocfs2_journal_access(handle, old_inode, old_inode_bh, | |
1250 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1251 | if (status >= 0) { | |
1252 | old_di = (struct ocfs2_dinode *) old_inode_bh->b_data; | |
1253 | ||
1254 | old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec); | |
1255 | old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec); | |
1256 | ||
1257 | status = ocfs2_journal_dirty(handle, old_inode_bh); | |
1258 | if (status < 0) | |
1259 | mlog_errno(status); | |
1260 | } else | |
1261 | mlog_errno(status); | |
ccd979bd MF |
1262 | |
1263 | /* now that the name has been added to new_dir, remove the old name */ | |
1264 | status = ocfs2_delete_entry(handle, old_dir, old_de, old_de_bh); | |
1265 | if (status < 0) { | |
1266 | mlog_errno(status); | |
1267 | goto bail; | |
1268 | } | |
1269 | ||
1270 | if (new_inode) { | |
1271 | new_inode->i_nlink--; | |
1272 | new_inode->i_ctime = CURRENT_TIME; | |
1273 | } | |
1274 | old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME; | |
1275 | if (old_inode_de_bh) { | |
1276 | status = ocfs2_journal_access(handle, old_inode, | |
1277 | old_inode_de_bh, | |
1278 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1279 | PARENT_INO(old_inode_de_bh->b_data) = | |
1280 | cpu_to_le64(OCFS2_I(new_dir)->ip_blkno); | |
1281 | status = ocfs2_journal_dirty(handle, old_inode_de_bh); | |
1282 | old_dir->i_nlink--; | |
1283 | if (new_inode) { | |
1284 | new_inode->i_nlink--; | |
1285 | } else { | |
d8c76e6f | 1286 | inc_nlink(new_dir); |
ccd979bd MF |
1287 | mark_inode_dirty(new_dir); |
1288 | } | |
1289 | } | |
1290 | mark_inode_dirty(old_dir); | |
592282cf MF |
1291 | ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh); |
1292 | if (new_inode) { | |
ccd979bd | 1293 | mark_inode_dirty(new_inode); |
592282cf MF |
1294 | ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh); |
1295 | } | |
ccd979bd | 1296 | |
592282cf MF |
1297 | if (old_dir != new_dir) { |
1298 | /* Keep the same times on both directories.*/ | |
1299 | new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime; | |
1300 | ||
1301 | /* | |
1302 | * This will also pick up the i_nlink change from the | |
1303 | * block above. | |
1304 | */ | |
1305 | ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh); | |
1306 | } | |
ccd979bd MF |
1307 | |
1308 | if (old_dir_nlink != old_dir->i_nlink) { | |
1309 | if (!old_dir_bh) { | |
1310 | mlog(ML_ERROR, "need to change nlink for old dir " | |
b0697053 MF |
1311 | "%llu from %d to %d but bh is NULL!\n", |
1312 | (unsigned long long)OCFS2_I(old_dir)->ip_blkno, | |
1313 | (int)old_dir_nlink, old_dir->i_nlink); | |
ccd979bd MF |
1314 | } else { |
1315 | struct ocfs2_dinode *fe; | |
1316 | status = ocfs2_journal_access(handle, old_dir, | |
1317 | old_dir_bh, | |
1318 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1319 | fe = (struct ocfs2_dinode *) old_dir_bh->b_data; | |
1320 | fe->i_links_count = cpu_to_le16(old_dir->i_nlink); | |
1321 | status = ocfs2_journal_dirty(handle, old_dir_bh); | |
1322 | } | |
1323 | } | |
1324 | ||
379dfe9d | 1325 | ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); |
ccd979bd MF |
1326 | status = 0; |
1327 | bail: | |
1328 | if (rename_lock) | |
1329 | ocfs2_rename_unlock(osb); | |
1330 | ||
1331 | if (handle) | |
02dc1af4 | 1332 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 1333 | |
8d5596c6 MF |
1334 | if (parents_locked) |
1335 | ocfs2_double_unlock(old_dir, new_dir); | |
1336 | ||
1337 | if (old_child_locked) | |
1338 | ocfs2_meta_unlock(old_inode, 1); | |
1339 | ||
1340 | if (new_child_locked) | |
1341 | ocfs2_meta_unlock(new_inode, 1); | |
1342 | ||
5098c27b MF |
1343 | if (orphan_dir) { |
1344 | /* This was locked for us in ocfs2_prepare_orphan_dir() */ | |
1345 | ocfs2_meta_unlock(orphan_dir, 1); | |
1346 | mutex_unlock(&orphan_dir->i_mutex); | |
1347 | iput(orphan_dir); | |
1348 | } | |
1349 | ||
ccd979bd MF |
1350 | if (new_inode) |
1351 | sync_mapping_buffers(old_inode->i_mapping); | |
1352 | ||
1353 | if (new_inode) | |
1354 | iput(new_inode); | |
1355 | if (newfe_bh) | |
1356 | brelse(newfe_bh); | |
592282cf MF |
1357 | if (old_inode_bh) |
1358 | brelse(old_inode_bh); | |
ccd979bd MF |
1359 | if (old_dir_bh) |
1360 | brelse(old_dir_bh); | |
1361 | if (new_dir_bh) | |
1362 | brelse(new_dir_bh); | |
1363 | if (new_de_bh) | |
1364 | brelse(new_de_bh); | |
1365 | if (old_de_bh) | |
1366 | brelse(old_de_bh); | |
1367 | if (old_inode_de_bh) | |
1368 | brelse(old_inode_de_bh); | |
1369 | if (orphan_entry_bh) | |
1370 | brelse(orphan_entry_bh); | |
1371 | if (insert_entry_bh) | |
1372 | brelse(insert_entry_bh); | |
1373 | ||
1374 | mlog_exit(status); | |
1375 | ||
1376 | return status; | |
1377 | } | |
1378 | ||
1379 | /* | |
1380 | * we expect i_size = strlen(symname). Copy symname into the file | |
1381 | * data, including the null terminator. | |
1382 | */ | |
1383 | static int ocfs2_create_symlink_data(struct ocfs2_super *osb, | |
1fabe148 | 1384 | handle_t *handle, |
ccd979bd MF |
1385 | struct inode *inode, |
1386 | const char *symname) | |
1387 | { | |
1388 | struct buffer_head **bhs = NULL; | |
1389 | const char *c; | |
1390 | struct super_block *sb = osb->sb; | |
4f902c37 | 1391 | u64 p_blkno, p_blocks; |
ccd979bd MF |
1392 | int virtual, blocks, status, i, bytes_left; |
1393 | ||
1394 | bytes_left = i_size_read(inode) + 1; | |
1395 | /* we can't trust i_blocks because we're actually going to | |
1396 | * write i_size + 1 bytes. */ | |
1397 | blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; | |
1398 | ||
5515eff8 AM |
1399 | mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n", |
1400 | (unsigned long long)inode->i_blocks, | |
1401 | i_size_read(inode), blocks); | |
ccd979bd MF |
1402 | |
1403 | /* Sanity check -- make sure we're going to fit. */ | |
1404 | if (bytes_left > | |
1405 | ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { | |
1406 | status = -EIO; | |
1407 | mlog_errno(status); | |
1408 | goto bail; | |
1409 | } | |
1410 | ||
1411 | bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); | |
1412 | if (!bhs) { | |
1413 | status = -ENOMEM; | |
1414 | mlog_errno(status); | |
1415 | goto bail; | |
1416 | } | |
1417 | ||
49cb8d2d MF |
1418 | status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks, |
1419 | NULL); | |
ccd979bd MF |
1420 | if (status < 0) { |
1421 | mlog_errno(status); | |
1422 | goto bail; | |
1423 | } | |
1424 | ||
1425 | /* links can never be larger than one cluster so we know this | |
1426 | * is all going to be contiguous, but do a sanity check | |
1427 | * anyway. */ | |
1428 | if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { | |
1429 | status = -EIO; | |
1430 | mlog_errno(status); | |
1431 | goto bail; | |
1432 | } | |
1433 | ||
1434 | virtual = 0; | |
1435 | while(bytes_left > 0) { | |
1436 | c = &symname[virtual * sb->s_blocksize]; | |
1437 | ||
1438 | bhs[virtual] = sb_getblk(sb, p_blkno); | |
1439 | if (!bhs[virtual]) { | |
1440 | status = -ENOMEM; | |
1441 | mlog_errno(status); | |
1442 | goto bail; | |
1443 | } | |
1444 | ocfs2_set_new_buffer_uptodate(inode, bhs[virtual]); | |
1445 | ||
1446 | status = ocfs2_journal_access(handle, inode, bhs[virtual], | |
1447 | OCFS2_JOURNAL_ACCESS_CREATE); | |
1448 | if (status < 0) { | |
1449 | mlog_errno(status); | |
1450 | goto bail; | |
1451 | } | |
1452 | ||
1453 | memset(bhs[virtual]->b_data, 0, sb->s_blocksize); | |
1454 | ||
1455 | memcpy(bhs[virtual]->b_data, c, | |
1456 | (bytes_left > sb->s_blocksize) ? sb->s_blocksize : | |
1457 | bytes_left); | |
1458 | ||
1459 | status = ocfs2_journal_dirty(handle, bhs[virtual]); | |
1460 | if (status < 0) { | |
1461 | mlog_errno(status); | |
1462 | goto bail; | |
1463 | } | |
1464 | ||
1465 | virtual++; | |
1466 | p_blkno++; | |
1467 | bytes_left -= sb->s_blocksize; | |
1468 | } | |
1469 | ||
1470 | status = 0; | |
1471 | bail: | |
1472 | ||
1473 | if (bhs) { | |
1474 | for(i = 0; i < blocks; i++) | |
1475 | if (bhs[i]) | |
1476 | brelse(bhs[i]); | |
1477 | kfree(bhs); | |
1478 | } | |
1479 | ||
1480 | mlog_exit(status); | |
1481 | return status; | |
1482 | } | |
1483 | ||
1484 | static int ocfs2_symlink(struct inode *dir, | |
1485 | struct dentry *dentry, | |
1486 | const char *symname) | |
1487 | { | |
1488 | int status, l, credits; | |
1489 | u64 newsize; | |
1490 | struct ocfs2_super *osb = NULL; | |
1491 | struct inode *inode = NULL; | |
1492 | struct super_block *sb; | |
1493 | struct buffer_head *new_fe_bh = NULL; | |
1494 | struct buffer_head *de_bh = NULL; | |
1495 | struct buffer_head *parent_fe_bh = NULL; | |
1496 | struct ocfs2_dinode *fe = NULL; | |
1497 | struct ocfs2_dinode *dirfe; | |
1fabe148 | 1498 | handle_t *handle = NULL; |
ccd979bd MF |
1499 | struct ocfs2_alloc_context *inode_ac = NULL; |
1500 | struct ocfs2_alloc_context *data_ac = NULL; | |
1501 | ||
1502 | mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir, | |
1503 | dentry, symname, dentry->d_name.len, dentry->d_name.name); | |
1504 | ||
1505 | sb = dir->i_sb; | |
1506 | osb = OCFS2_SB(sb); | |
1507 | ||
1508 | l = strlen(symname) + 1; | |
1509 | ||
1510 | credits = ocfs2_calc_symlink_credits(sb); | |
1511 | ||
ccd979bd | 1512 | /* lock the parent directory */ |
4bcec184 | 1513 | status = ocfs2_meta_lock(dir, &parent_fe_bh, 1); |
ccd979bd MF |
1514 | if (status < 0) { |
1515 | if (status != -ENOENT) | |
1516 | mlog_errno(status); | |
6d8fc40e | 1517 | return status; |
ccd979bd MF |
1518 | } |
1519 | ||
1520 | dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; | |
1521 | if (!dirfe->i_links_count) { | |
1522 | /* can't make a file in a deleted directory. */ | |
1523 | status = -ENOENT; | |
1524 | goto bail; | |
1525 | } | |
1526 | ||
1527 | status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, | |
1528 | dentry->d_name.len); | |
1529 | if (status) | |
1530 | goto bail; | |
1531 | ||
1532 | status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, | |
1533 | dentry->d_name.name, | |
1534 | dentry->d_name.len, &de_bh); | |
1535 | if (status < 0) { | |
1536 | mlog_errno(status); | |
1537 | goto bail; | |
1538 | } | |
1539 | ||
da5cbf2f | 1540 | status = ocfs2_reserve_new_inode(osb, &inode_ac); |
ccd979bd MF |
1541 | if (status < 0) { |
1542 | if (status != -ENOSPC) | |
1543 | mlog_errno(status); | |
1544 | goto bail; | |
1545 | } | |
1546 | ||
1547 | /* don't reserve bitmap space for fast symlinks. */ | |
1548 | if (l > ocfs2_fast_symlink_chars(sb)) { | |
da5cbf2f | 1549 | status = ocfs2_reserve_clusters(osb, 1, &data_ac); |
ccd979bd MF |
1550 | if (status < 0) { |
1551 | if (status != -ENOSPC) | |
1552 | mlog_errno(status); | |
1553 | goto bail; | |
1554 | } | |
1555 | } | |
1556 | ||
65eff9cc | 1557 | handle = ocfs2_start_trans(osb, credits); |
ccd979bd MF |
1558 | if (IS_ERR(handle)) { |
1559 | status = PTR_ERR(handle); | |
1560 | handle = NULL; | |
1561 | mlog_errno(status); | |
1562 | goto bail; | |
1563 | } | |
1564 | ||
1565 | status = ocfs2_mknod_locked(osb, dir, dentry, | |
1566 | S_IFLNK | S_IRWXUGO, 0, | |
1567 | &new_fe_bh, parent_fe_bh, handle, | |
1568 | &inode, inode_ac); | |
1569 | if (status < 0) { | |
1570 | mlog_errno(status); | |
1571 | goto bail; | |
1572 | } | |
1573 | ||
1574 | fe = (struct ocfs2_dinode *) new_fe_bh->b_data; | |
1575 | inode->i_rdev = 0; | |
1576 | newsize = l - 1; | |
1577 | if (l > ocfs2_fast_symlink_chars(sb)) { | |
dcd0538f MF |
1578 | u32 offset = 0; |
1579 | ||
ccd979bd | 1580 | inode->i_op = &ocfs2_symlink_inode_operations; |
2ae99a60 | 1581 | status = ocfs2_do_extend_allocation(osb, inode, &offset, 1, 0, |
dcd0538f | 1582 | new_fe_bh, |
ccd979bd MF |
1583 | handle, data_ac, NULL, |
1584 | NULL); | |
1585 | if (status < 0) { | |
1586 | if (status != -ENOSPC && status != -EINTR) { | |
b0697053 MF |
1587 | mlog(ML_ERROR, |
1588 | "Failed to extend file to %llu\n", | |
1589 | (unsigned long long)newsize); | |
ccd979bd MF |
1590 | mlog_errno(status); |
1591 | status = -ENOSPC; | |
1592 | } | |
1593 | goto bail; | |
1594 | } | |
1595 | i_size_write(inode, newsize); | |
8110b073 | 1596 | inode->i_blocks = ocfs2_inode_sector_count(inode); |
ccd979bd MF |
1597 | } else { |
1598 | inode->i_op = &ocfs2_fast_symlink_inode_operations; | |
1599 | memcpy((char *) fe->id2.i_symlink, symname, l); | |
1600 | i_size_write(inode, newsize); | |
1601 | inode->i_blocks = 0; | |
1602 | } | |
1603 | ||
1604 | status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); | |
1605 | if (status < 0) { | |
1606 | mlog_errno(status); | |
1607 | goto bail; | |
1608 | } | |
1609 | ||
1610 | if (!ocfs2_inode_is_fast_symlink(inode)) { | |
1611 | status = ocfs2_create_symlink_data(osb, handle, inode, | |
1612 | symname); | |
1613 | if (status < 0) { | |
1614 | mlog_errno(status); | |
1615 | goto bail; | |
1616 | } | |
1617 | } | |
1618 | ||
1619 | status = ocfs2_add_entry(handle, dentry, inode, | |
1620 | le64_to_cpu(fe->i_blkno), parent_fe_bh, | |
1621 | de_bh); | |
1622 | if (status < 0) { | |
1623 | mlog_errno(status); | |
1624 | goto bail; | |
1625 | } | |
1626 | ||
0027dd5b | 1627 | status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); |
379dfe9d MF |
1628 | if (status) { |
1629 | mlog_errno(status); | |
1630 | goto bail; | |
1631 | } | |
1632 | ||
ccd979bd MF |
1633 | insert_inode_hash(inode); |
1634 | dentry->d_op = &ocfs2_dentry_ops; | |
1635 | d_instantiate(dentry, inode); | |
1636 | bail: | |
1637 | if (handle) | |
02dc1af4 | 1638 | ocfs2_commit_trans(osb, handle); |
6d8fc40e MF |
1639 | |
1640 | ocfs2_meta_unlock(dir, 1); | |
1641 | ||
ccd979bd MF |
1642 | if (new_fe_bh) |
1643 | brelse(new_fe_bh); | |
1644 | if (parent_fe_bh) | |
1645 | brelse(parent_fe_bh); | |
1646 | if (de_bh) | |
1647 | brelse(de_bh); | |
1648 | if (inode_ac) | |
1649 | ocfs2_free_alloc_context(inode_ac); | |
1650 | if (data_ac) | |
1651 | ocfs2_free_alloc_context(data_ac); | |
1652 | if ((status < 0) && inode) | |
1653 | iput(inode); | |
1654 | ||
1655 | mlog_exit(status); | |
1656 | ||
1657 | return status; | |
1658 | } | |
1659 | ||
ccd979bd MF |
1660 | static int ocfs2_blkno_stringify(u64 blkno, char *name) |
1661 | { | |
1662 | int status, namelen; | |
1663 | ||
1664 | mlog_entry_void(); | |
1665 | ||
b0697053 MF |
1666 | namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", |
1667 | (long long)blkno); | |
ccd979bd MF |
1668 | if (namelen <= 0) { |
1669 | if (namelen) | |
1670 | status = namelen; | |
1671 | else | |
1672 | status = -EINVAL; | |
1673 | mlog_errno(status); | |
1674 | goto bail; | |
1675 | } | |
1676 | if (namelen != OCFS2_ORPHAN_NAMELEN) { | |
1677 | status = -EINVAL; | |
1678 | mlog_errno(status); | |
1679 | goto bail; | |
1680 | } | |
1681 | ||
1682 | mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name, | |
1683 | namelen); | |
1684 | ||
1685 | status = 0; | |
1686 | bail: | |
1687 | mlog_exit(status); | |
1688 | return status; | |
1689 | } | |
1690 | ||
1691 | static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, | |
5098c27b | 1692 | struct inode **ret_orphan_dir, |
ccd979bd MF |
1693 | struct inode *inode, |
1694 | char *name, | |
1695 | struct buffer_head **de_bh) | |
1696 | { | |
5098c27b | 1697 | struct inode *orphan_dir_inode; |
ccd979bd MF |
1698 | struct buffer_head *orphan_dir_bh = NULL; |
1699 | int status = 0; | |
1700 | ||
1701 | status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); | |
1702 | if (status < 0) { | |
1703 | mlog_errno(status); | |
5098c27b | 1704 | return status; |
ccd979bd MF |
1705 | } |
1706 | ||
1707 | orphan_dir_inode = ocfs2_get_system_file_inode(osb, | |
1708 | ORPHAN_DIR_SYSTEM_INODE, | |
1709 | osb->slot_num); | |
1710 | if (!orphan_dir_inode) { | |
1711 | status = -ENOENT; | |
1712 | mlog_errno(status); | |
5098c27b | 1713 | return status; |
ccd979bd MF |
1714 | } |
1715 | ||
5098c27b MF |
1716 | mutex_lock(&orphan_dir_inode->i_mutex); |
1717 | ||
4bcec184 | 1718 | status = ocfs2_meta_lock(orphan_dir_inode, &orphan_dir_bh, 1); |
ccd979bd MF |
1719 | if (status < 0) { |
1720 | mlog_errno(status); | |
1721 | goto leave; | |
1722 | } | |
1723 | ||
1724 | status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, | |
1725 | orphan_dir_bh, name, | |
1726 | OCFS2_ORPHAN_NAMELEN, de_bh); | |
1727 | if (status < 0) { | |
5098c27b MF |
1728 | ocfs2_meta_unlock(orphan_dir_inode, 1); |
1729 | ||
ccd979bd MF |
1730 | mlog_errno(status); |
1731 | goto leave; | |
1732 | } | |
1733 | ||
5098c27b MF |
1734 | *ret_orphan_dir = orphan_dir_inode; |
1735 | ||
ccd979bd | 1736 | leave: |
5098c27b MF |
1737 | if (status) { |
1738 | mutex_unlock(&orphan_dir_inode->i_mutex); | |
ccd979bd | 1739 | iput(orphan_dir_inode); |
5098c27b | 1740 | } |
ccd979bd MF |
1741 | |
1742 | if (orphan_dir_bh) | |
1743 | brelse(orphan_dir_bh); | |
1744 | ||
1745 | mlog_exit(status); | |
1746 | return status; | |
1747 | } | |
1748 | ||
1749 | static int ocfs2_orphan_add(struct ocfs2_super *osb, | |
1fabe148 | 1750 | handle_t *handle, |
ccd979bd MF |
1751 | struct inode *inode, |
1752 | struct ocfs2_dinode *fe, | |
1753 | char *name, | |
5098c27b MF |
1754 | struct buffer_head *de_bh, |
1755 | struct inode *orphan_dir_inode) | |
ccd979bd | 1756 | { |
ccd979bd MF |
1757 | struct buffer_head *orphan_dir_bh = NULL; |
1758 | int status = 0; | |
1759 | struct ocfs2_dinode *orphan_fe; | |
1760 | ||
1761 | mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino); | |
1762 | ||
ccd979bd MF |
1763 | status = ocfs2_read_block(osb, |
1764 | OCFS2_I(orphan_dir_inode)->ip_blkno, | |
1765 | &orphan_dir_bh, OCFS2_BH_CACHED, | |
1766 | orphan_dir_inode); | |
1767 | if (status < 0) { | |
1768 | mlog_errno(status); | |
1769 | goto leave; | |
1770 | } | |
1771 | ||
1772 | status = ocfs2_journal_access(handle, orphan_dir_inode, orphan_dir_bh, | |
1773 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1774 | if (status < 0) { | |
1775 | mlog_errno(status); | |
1776 | goto leave; | |
1777 | } | |
1778 | ||
1779 | /* we're a cluster, and nlink can change on disk from | |
1780 | * underneath us... */ | |
1781 | orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; | |
1782 | if (S_ISDIR(inode->i_mode)) | |
1783 | le16_add_cpu(&orphan_fe->i_links_count, 1); | |
1784 | orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count); | |
1785 | ||
1786 | status = ocfs2_journal_dirty(handle, orphan_dir_bh); | |
1787 | if (status < 0) { | |
1788 | mlog_errno(status); | |
1789 | goto leave; | |
1790 | } | |
1791 | ||
1792 | status = __ocfs2_add_entry(handle, orphan_dir_inode, name, | |
1793 | OCFS2_ORPHAN_NAMELEN, inode, | |
1794 | OCFS2_I(inode)->ip_blkno, | |
1795 | orphan_dir_bh, de_bh); | |
1796 | if (status < 0) { | |
1797 | mlog_errno(status); | |
1798 | goto leave; | |
1799 | } | |
1800 | ||
1801 | le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL); | |
1802 | ||
1803 | /* Record which orphan dir our inode now resides | |
1804 | * in. delete_inode will use this to determine which orphan | |
1805 | * dir to lock. */ | |
50008630 | 1806 | fe->i_orphaned_slot = cpu_to_le16(osb->slot_num); |
ccd979bd | 1807 | |
b0697053 MF |
1808 | mlog(0, "Inode %llu orphaned in slot %d\n", |
1809 | (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num); | |
ccd979bd MF |
1810 | |
1811 | leave: | |
ccd979bd MF |
1812 | if (orphan_dir_bh) |
1813 | brelse(orphan_dir_bh); | |
1814 | ||
1815 | mlog_exit(status); | |
1816 | return status; | |
1817 | } | |
1818 | ||
1819 | /* unlike orphan_add, we expect the orphan dir to already be locked here. */ | |
1820 | int ocfs2_orphan_del(struct ocfs2_super *osb, | |
1fabe148 | 1821 | handle_t *handle, |
ccd979bd MF |
1822 | struct inode *orphan_dir_inode, |
1823 | struct inode *inode, | |
1824 | struct buffer_head *orphan_dir_bh) | |
1825 | { | |
1826 | char name[OCFS2_ORPHAN_NAMELEN + 1]; | |
1827 | struct ocfs2_dinode *orphan_fe; | |
1828 | int status = 0; | |
1829 | struct buffer_head *target_de_bh = NULL; | |
1830 | struct ocfs2_dir_entry *target_de = NULL; | |
1831 | ||
1832 | mlog_entry_void(); | |
1833 | ||
1834 | status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); | |
1835 | if (status < 0) { | |
1836 | mlog_errno(status); | |
1837 | goto leave; | |
1838 | } | |
1839 | ||
b0697053 MF |
1840 | mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n", |
1841 | name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, | |
1842 | OCFS2_ORPHAN_NAMELEN); | |
ccd979bd MF |
1843 | |
1844 | /* find it's spot in the orphan directory */ | |
1845 | target_de_bh = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, | |
1846 | orphan_dir_inode, &target_de); | |
1847 | if (!target_de_bh) { | |
1848 | status = -ENOENT; | |
1849 | mlog_errno(status); | |
1850 | goto leave; | |
1851 | } | |
1852 | ||
1853 | /* remove it from the orphan directory */ | |
1854 | status = ocfs2_delete_entry(handle, orphan_dir_inode, target_de, | |
1855 | target_de_bh); | |
1856 | if (status < 0) { | |
1857 | mlog_errno(status); | |
1858 | goto leave; | |
1859 | } | |
1860 | ||
1861 | status = ocfs2_journal_access(handle,orphan_dir_inode, orphan_dir_bh, | |
1862 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1863 | if (status < 0) { | |
1864 | mlog_errno(status); | |
1865 | goto leave; | |
1866 | } | |
1867 | ||
1868 | /* do the i_nlink dance! :) */ | |
1869 | orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; | |
1870 | if (S_ISDIR(inode->i_mode)) | |
1871 | le16_add_cpu(&orphan_fe->i_links_count, -1); | |
1872 | orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count); | |
1873 | ||
1874 | status = ocfs2_journal_dirty(handle, orphan_dir_bh); | |
1875 | if (status < 0) { | |
1876 | mlog_errno(status); | |
1877 | goto leave; | |
1878 | } | |
1879 | ||
1880 | leave: | |
1881 | if (target_de_bh) | |
1882 | brelse(target_de_bh); | |
1883 | ||
1884 | mlog_exit(status); | |
1885 | return status; | |
1886 | } | |
1887 | ||
92e1d5be | 1888 | const struct inode_operations ocfs2_dir_iops = { |
ccd979bd MF |
1889 | .create = ocfs2_create, |
1890 | .lookup = ocfs2_lookup, | |
1891 | .link = ocfs2_link, | |
1892 | .unlink = ocfs2_unlink, | |
1893 | .rmdir = ocfs2_unlink, | |
1894 | .symlink = ocfs2_symlink, | |
1895 | .mkdir = ocfs2_mkdir, | |
1896 | .mknod = ocfs2_mknod, | |
1897 | .rename = ocfs2_rename, | |
1898 | .setattr = ocfs2_setattr, | |
1899 | .getattr = ocfs2_getattr, | |
d38eb8db | 1900 | .permission = ocfs2_permission, |
ccd979bd | 1901 | }; |