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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" | |
cf1d6c76 | 63 | #include "xattr.h" |
ccd979bd MF |
64 | |
65 | #include "buffer_head_io.h" | |
66 | ||
ccd979bd MF |
67 | static int ocfs2_mknod_locked(struct ocfs2_super *osb, |
68 | struct inode *dir, | |
69 | struct dentry *dentry, int mode, | |
70 | dev_t dev, | |
71 | struct buffer_head **new_fe_bh, | |
72 | struct buffer_head *parent_fe_bh, | |
1fabe148 | 73 | handle_t *handle, |
ccd979bd MF |
74 | struct inode **ret_inode, |
75 | struct ocfs2_alloc_context *inode_ac); | |
76 | ||
ccd979bd | 77 | static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, |
5098c27b | 78 | struct inode **ret_orphan_dir, |
ccd979bd MF |
79 | struct inode *inode, |
80 | char *name, | |
81 | struct buffer_head **de_bh); | |
82 | ||
83 | static int ocfs2_orphan_add(struct ocfs2_super *osb, | |
1fabe148 | 84 | handle_t *handle, |
ccd979bd MF |
85 | struct inode *inode, |
86 | struct ocfs2_dinode *fe, | |
87 | char *name, | |
5098c27b MF |
88 | struct buffer_head *de_bh, |
89 | struct inode *orphan_dir_inode); | |
ccd979bd MF |
90 | |
91 | static int ocfs2_create_symlink_data(struct ocfs2_super *osb, | |
1fabe148 | 92 | handle_t *handle, |
ccd979bd MF |
93 | struct inode *inode, |
94 | const char *symname); | |
95 | ||
ccd979bd MF |
96 | /* An orphan dir name is an 8 byte value, printed as a hex string */ |
97 | #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64))) | |
98 | ||
99 | static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry, | |
100 | struct nameidata *nd) | |
101 | { | |
102 | int status; | |
103 | u64 blkno; | |
ccd979bd MF |
104 | struct inode *inode = NULL; |
105 | struct dentry *ret; | |
ccd979bd MF |
106 | struct ocfs2_inode_info *oi; |
107 | ||
108 | mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry, | |
109 | dentry->d_name.len, dentry->d_name.name); | |
110 | ||
111 | if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) { | |
112 | ret = ERR_PTR(-ENAMETOOLONG); | |
113 | goto bail; | |
114 | } | |
115 | ||
b0697053 MF |
116 | mlog(0, "find name %.*s in directory %llu\n", dentry->d_name.len, |
117 | dentry->d_name.name, (unsigned long long)OCFS2_I(dir)->ip_blkno); | |
ccd979bd | 118 | |
e63aecb6 | 119 | status = ocfs2_inode_lock(dir, NULL, 0); |
ccd979bd MF |
120 | if (status < 0) { |
121 | if (status != -ENOENT) | |
122 | mlog_errno(status); | |
123 | ret = ERR_PTR(status); | |
124 | goto bail; | |
125 | } | |
126 | ||
be94d117 MF |
127 | status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name, |
128 | dentry->d_name.len, &blkno); | |
ccd979bd MF |
129 | if (status < 0) |
130 | goto bail_add; | |
131 | ||
5fa0613e | 132 | inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0); |
ccd979bd | 133 | if (IS_ERR(inode)) { |
ccd979bd MF |
134 | ret = ERR_PTR(-EACCES); |
135 | goto bail_unlock; | |
136 | } | |
137 | ||
138 | oi = OCFS2_I(inode); | |
139 | /* Clear any orphaned state... If we were able to look up the | |
140 | * inode from a directory, it certainly can't be orphaned. We | |
141 | * might have the bad state from a node which intended to | |
142 | * orphan this inode but crashed before it could commit the | |
143 | * unlink. */ | |
144 | spin_lock(&oi->ip_lock); | |
145 | oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED; | |
ccd979bd MF |
146 | spin_unlock(&oi->ip_lock); |
147 | ||
148 | bail_add: | |
ccd979bd MF |
149 | dentry->d_op = &ocfs2_dentry_ops; |
150 | ret = d_splice_alias(inode, dentry); | |
151 | ||
379dfe9d MF |
152 | if (inode) { |
153 | /* | |
154 | * If d_splice_alias() finds a DCACHE_DISCONNECTED | |
155 | * dentry, it will d_move() it on top of ourse. The | |
156 | * return value will indicate this however, so in | |
157 | * those cases, we switch them around for the locking | |
158 | * code. | |
159 | * | |
160 | * NOTE: This dentry already has ->d_op set from | |
161 | * ocfs2_get_parent() and ocfs2_get_dentry() | |
162 | */ | |
163 | if (ret) | |
164 | dentry = ret; | |
165 | ||
166 | status = ocfs2_dentry_attach_lock(dentry, inode, | |
0027dd5b | 167 | OCFS2_I(dir)->ip_blkno); |
379dfe9d MF |
168 | if (status) { |
169 | mlog_errno(status); | |
170 | ret = ERR_PTR(status); | |
171 | goto bail_unlock; | |
172 | } | |
173 | } | |
174 | ||
ccd979bd MF |
175 | bail_unlock: |
176 | /* Don't drop the cluster lock until *after* the d_add -- | |
177 | * unlink on another node will message us to remove that | |
178 | * dentry under this lock so otherwise we can race this with | |
34d024f8 | 179 | * the downconvert thread and have a stale dentry. */ |
e63aecb6 | 180 | ocfs2_inode_unlock(dir, 0); |
ccd979bd MF |
181 | |
182 | bail: | |
ccd979bd MF |
183 | |
184 | mlog_exit_ptr(ret); | |
185 | ||
186 | return ret; | |
187 | } | |
188 | ||
ccd979bd MF |
189 | static int ocfs2_mknod(struct inode *dir, |
190 | struct dentry *dentry, | |
191 | int mode, | |
192 | dev_t dev) | |
193 | { | |
194 | int status = 0; | |
195 | struct buffer_head *parent_fe_bh = NULL; | |
1fabe148 | 196 | handle_t *handle = NULL; |
ccd979bd MF |
197 | struct ocfs2_super *osb; |
198 | struct ocfs2_dinode *dirfe; | |
199 | struct buffer_head *new_fe_bh = NULL; | |
200 | struct buffer_head *de_bh = NULL; | |
201 | struct inode *inode = NULL; | |
202 | struct ocfs2_alloc_context *inode_ac = NULL; | |
203 | struct ocfs2_alloc_context *data_ac = NULL; | |
204 | ||
205 | mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode, | |
206 | (unsigned long)dev, dentry->d_name.len, | |
207 | dentry->d_name.name); | |
208 | ||
209 | /* get our super block */ | |
210 | osb = OCFS2_SB(dir->i_sb); | |
211 | ||
e63aecb6 | 212 | status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); |
e3a82138 MF |
213 | if (status < 0) { |
214 | if (status != -ENOENT) | |
215 | mlog_errno(status); | |
216 | return status; | |
217 | } | |
218 | ||
a663e305 MF |
219 | if (S_ISDIR(mode) && (dir->i_nlink >= OCFS2_LINK_MAX)) { |
220 | status = -EMLINK; | |
221 | goto leave; | |
222 | } | |
223 | ||
ccd979bd MF |
224 | dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; |
225 | if (!dirfe->i_links_count) { | |
226 | /* can't make a file in a deleted directory. */ | |
227 | status = -ENOENT; | |
228 | goto leave; | |
229 | } | |
230 | ||
231 | status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, | |
232 | dentry->d_name.len); | |
233 | if (status) | |
234 | goto leave; | |
235 | ||
236 | /* get a spot inside the dir. */ | |
237 | status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, | |
238 | dentry->d_name.name, | |
239 | dentry->d_name.len, &de_bh); | |
240 | if (status < 0) { | |
241 | mlog_errno(status); | |
242 | goto leave; | |
243 | } | |
244 | ||
245 | /* reserve an inode spot */ | |
da5cbf2f | 246 | status = ocfs2_reserve_new_inode(osb, &inode_ac); |
ccd979bd MF |
247 | if (status < 0) { |
248 | if (status != -ENOSPC) | |
249 | mlog_errno(status); | |
250 | goto leave; | |
251 | } | |
252 | ||
5b6a3a2b MF |
253 | /* Reserve a cluster if creating an extent based directory. */ |
254 | if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) { | |
da5cbf2f | 255 | status = ocfs2_reserve_clusters(osb, 1, &data_ac); |
ccd979bd MF |
256 | if (status < 0) { |
257 | if (status != -ENOSPC) | |
258 | mlog_errno(status); | |
259 | goto leave; | |
260 | } | |
261 | } | |
262 | ||
65eff9cc | 263 | handle = ocfs2_start_trans(osb, OCFS2_MKNOD_CREDITS); |
ccd979bd MF |
264 | if (IS_ERR(handle)) { |
265 | status = PTR_ERR(handle); | |
266 | handle = NULL; | |
267 | mlog_errno(status); | |
268 | goto leave; | |
269 | } | |
270 | ||
271 | /* do the real work now. */ | |
272 | status = ocfs2_mknod_locked(osb, dir, dentry, mode, dev, | |
273 | &new_fe_bh, parent_fe_bh, handle, | |
274 | &inode, inode_ac); | |
275 | if (status < 0) { | |
276 | mlog_errno(status); | |
277 | goto leave; | |
278 | } | |
279 | ||
280 | if (S_ISDIR(mode)) { | |
281 | status = ocfs2_fill_new_dir(osb, handle, dir, inode, | |
282 | new_fe_bh, data_ac); | |
283 | if (status < 0) { | |
284 | mlog_errno(status); | |
285 | goto leave; | |
286 | } | |
287 | ||
288 | status = ocfs2_journal_access(handle, dir, parent_fe_bh, | |
289 | OCFS2_JOURNAL_ACCESS_WRITE); | |
290 | if (status < 0) { | |
291 | mlog_errno(status); | |
292 | goto leave; | |
293 | } | |
294 | le16_add_cpu(&dirfe->i_links_count, 1); | |
295 | status = ocfs2_journal_dirty(handle, parent_fe_bh); | |
296 | if (status < 0) { | |
297 | mlog_errno(status); | |
298 | goto leave; | |
299 | } | |
d8c76e6f | 300 | inc_nlink(dir); |
ccd979bd MF |
301 | } |
302 | ||
303 | status = ocfs2_add_entry(handle, dentry, inode, | |
304 | OCFS2_I(inode)->ip_blkno, parent_fe_bh, | |
305 | de_bh); | |
306 | if (status < 0) { | |
307 | mlog_errno(status); | |
308 | goto leave; | |
309 | } | |
310 | ||
379dfe9d | 311 | status = ocfs2_dentry_attach_lock(dentry, inode, |
0027dd5b | 312 | OCFS2_I(dir)->ip_blkno); |
379dfe9d MF |
313 | if (status) { |
314 | mlog_errno(status); | |
315 | goto leave; | |
316 | } | |
317 | ||
ccd979bd MF |
318 | insert_inode_hash(inode); |
319 | dentry->d_op = &ocfs2_dentry_ops; | |
320 | d_instantiate(dentry, inode); | |
321 | status = 0; | |
322 | leave: | |
323 | if (handle) | |
02dc1af4 | 324 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 325 | |
e63aecb6 | 326 | ocfs2_inode_unlock(dir, 1); |
e3a82138 | 327 | |
ccd979bd MF |
328 | if (status == -ENOSPC) |
329 | mlog(0, "Disk is full\n"); | |
330 | ||
a81cb88b MF |
331 | brelse(new_fe_bh); |
332 | brelse(de_bh); | |
333 | brelse(parent_fe_bh); | |
ccd979bd MF |
334 | |
335 | if ((status < 0) && inode) | |
336 | iput(inode); | |
337 | ||
338 | if (inode_ac) | |
339 | ocfs2_free_alloc_context(inode_ac); | |
340 | ||
341 | if (data_ac) | |
342 | ocfs2_free_alloc_context(data_ac); | |
343 | ||
344 | mlog_exit(status); | |
345 | ||
346 | return status; | |
347 | } | |
348 | ||
349 | static int ocfs2_mknod_locked(struct ocfs2_super *osb, | |
350 | struct inode *dir, | |
351 | struct dentry *dentry, int mode, | |
352 | dev_t dev, | |
353 | struct buffer_head **new_fe_bh, | |
354 | struct buffer_head *parent_fe_bh, | |
1fabe148 | 355 | handle_t *handle, |
ccd979bd MF |
356 | struct inode **ret_inode, |
357 | struct ocfs2_alloc_context *inode_ac) | |
358 | { | |
359 | int status = 0; | |
360 | struct ocfs2_dinode *fe = NULL; | |
361 | struct ocfs2_extent_list *fel; | |
362 | u64 fe_blkno = 0; | |
363 | u16 suballoc_bit; | |
364 | struct inode *inode = NULL; | |
365 | ||
366 | mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode, | |
367 | (unsigned long)dev, dentry->d_name.len, | |
368 | dentry->d_name.name); | |
369 | ||
370 | *new_fe_bh = NULL; | |
371 | *ret_inode = NULL; | |
372 | ||
373 | status = ocfs2_claim_new_inode(osb, handle, inode_ac, &suballoc_bit, | |
374 | &fe_blkno); | |
375 | if (status < 0) { | |
376 | mlog_errno(status); | |
377 | goto leave; | |
378 | } | |
379 | ||
380 | inode = new_inode(dir->i_sb); | |
87cfa004 JK |
381 | if (!inode) { |
382 | status = -ENOMEM; | |
ccd979bd MF |
383 | mlog(ML_ERROR, "new_inode failed!\n"); |
384 | goto leave; | |
385 | } | |
386 | ||
387 | /* populate as many fields early on as possible - many of | |
388 | * these are used by the support functions here and in | |
389 | * callers. */ | |
390 | inode->i_ino = ino_from_blkno(osb->sb, fe_blkno); | |
391 | OCFS2_I(inode)->ip_blkno = fe_blkno; | |
392 | if (S_ISDIR(mode)) | |
393 | inode->i_nlink = 2; | |
394 | else | |
395 | inode->i_nlink = 1; | |
396 | inode->i_mode = mode; | |
397 | spin_lock(&osb->osb_lock); | |
398 | inode->i_generation = osb->s_next_generation++; | |
399 | spin_unlock(&osb->osb_lock); | |
400 | ||
401 | *new_fe_bh = sb_getblk(osb->sb, fe_blkno); | |
402 | if (!*new_fe_bh) { | |
403 | status = -EIO; | |
404 | mlog_errno(status); | |
405 | goto leave; | |
406 | } | |
407 | ocfs2_set_new_buffer_uptodate(inode, *new_fe_bh); | |
408 | ||
409 | status = ocfs2_journal_access(handle, inode, *new_fe_bh, | |
410 | OCFS2_JOURNAL_ACCESS_CREATE); | |
411 | if (status < 0) { | |
412 | mlog_errno(status); | |
413 | goto leave; | |
414 | } | |
415 | ||
416 | fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data; | |
417 | memset(fe, 0, osb->sb->s_blocksize); | |
418 | ||
419 | fe->i_generation = cpu_to_le32(inode->i_generation); | |
420 | fe->i_fs_generation = cpu_to_le32(osb->fs_generation); | |
421 | fe->i_blkno = cpu_to_le64(fe_blkno); | |
422 | fe->i_suballoc_bit = cpu_to_le16(suballoc_bit); | |
4d0ddb2c | 423 | fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot); |
b19c2a3b | 424 | fe->i_uid = cpu_to_le32(current_fsuid()); |
ccd979bd MF |
425 | if (dir->i_mode & S_ISGID) { |
426 | fe->i_gid = cpu_to_le32(dir->i_gid); | |
427 | if (S_ISDIR(mode)) | |
428 | mode |= S_ISGID; | |
429 | } else | |
b19c2a3b | 430 | fe->i_gid = cpu_to_le32(current_fsgid()); |
ccd979bd MF |
431 | fe->i_mode = cpu_to_le16(mode); |
432 | if (S_ISCHR(mode) || S_ISBLK(mode)) | |
433 | fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev)); | |
434 | ||
435 | fe->i_links_count = cpu_to_le16(inode->i_nlink); | |
436 | ||
437 | fe->i_last_eb_blk = 0; | |
438 | strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE); | |
439 | le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL); | |
440 | fe->i_atime = fe->i_ctime = fe->i_mtime = | |
441 | cpu_to_le64(CURRENT_TIME.tv_sec); | |
442 | fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = | |
443 | cpu_to_le32(CURRENT_TIME.tv_nsec); | |
444 | fe->i_dtime = 0; | |
445 | ||
5b6a3a2b MF |
446 | /* |
447 | * If supported, directories start with inline data. | |
448 | */ | |
449 | if (S_ISDIR(mode) && ocfs2_supports_inline_data(osb)) { | |
450 | u16 feat = le16_to_cpu(fe->i_dyn_features); | |
451 | ||
452 | fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL); | |
453 | ||
454 | fe->id2.i_data.id_count = cpu_to_le16(ocfs2_max_inline_data(osb->sb)); | |
455 | } else { | |
456 | fel = &fe->id2.i_list; | |
457 | fel->l_tree_depth = 0; | |
458 | fel->l_next_free_rec = 0; | |
459 | fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb)); | |
460 | } | |
ccd979bd MF |
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 | } | |
b99835c1 JK |
494 | if (inode) { |
495 | clear_nlink(inode); | |
ccd979bd | 496 | iput(inode); |
b99835c1 | 497 | } |
ccd979bd MF |
498 | } |
499 | ||
500 | mlog_exit(status); | |
501 | return status; | |
502 | } | |
503 | ||
504 | static int ocfs2_mkdir(struct inode *dir, | |
505 | struct dentry *dentry, | |
506 | int mode) | |
507 | { | |
508 | int ret; | |
509 | ||
510 | mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode, | |
511 | dentry->d_name.len, dentry->d_name.name); | |
512 | ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0); | |
513 | mlog_exit(ret); | |
514 | ||
515 | return ret; | |
516 | } | |
517 | ||
518 | static int ocfs2_create(struct inode *dir, | |
519 | struct dentry *dentry, | |
520 | int mode, | |
521 | struct nameidata *nd) | |
522 | { | |
523 | int ret; | |
524 | ||
525 | mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode, | |
526 | dentry->d_name.len, dentry->d_name.name); | |
527 | ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0); | |
528 | mlog_exit(ret); | |
529 | ||
530 | return ret; | |
531 | } | |
532 | ||
533 | static int ocfs2_link(struct dentry *old_dentry, | |
534 | struct inode *dir, | |
535 | struct dentry *dentry) | |
536 | { | |
1fabe148 | 537 | handle_t *handle; |
ccd979bd MF |
538 | struct inode *inode = old_dentry->d_inode; |
539 | int err; | |
540 | struct buffer_head *fe_bh = NULL; | |
541 | struct buffer_head *parent_fe_bh = NULL; | |
542 | struct buffer_head *de_bh = NULL; | |
543 | struct ocfs2_dinode *fe = NULL; | |
544 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
545 | ||
546 | mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino, | |
547 | old_dentry->d_name.len, old_dentry->d_name.name, | |
548 | dentry->d_name.len, dentry->d_name.name); | |
549 | ||
123a9643 MF |
550 | if (S_ISDIR(inode->i_mode)) |
551 | return -EPERM; | |
ccd979bd | 552 | |
e63aecb6 | 553 | err = ocfs2_inode_lock(dir, &parent_fe_bh, 1); |
ccd979bd MF |
554 | if (err < 0) { |
555 | if (err != -ENOENT) | |
556 | mlog_errno(err); | |
123a9643 | 557 | return err; |
ccd979bd MF |
558 | } |
559 | ||
0f62de2c TY |
560 | if (!dir->i_nlink) { |
561 | err = -ENOENT; | |
123a9643 | 562 | goto out; |
0f62de2c TY |
563 | } |
564 | ||
ccd979bd MF |
565 | err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, |
566 | dentry->d_name.len); | |
567 | if (err) | |
123a9643 | 568 | goto out; |
ccd979bd MF |
569 | |
570 | err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, | |
571 | dentry->d_name.name, | |
572 | dentry->d_name.len, &de_bh); | |
573 | if (err < 0) { | |
574 | mlog_errno(err); | |
123a9643 | 575 | goto out; |
ccd979bd MF |
576 | } |
577 | ||
e63aecb6 | 578 | err = ocfs2_inode_lock(inode, &fe_bh, 1); |
ccd979bd MF |
579 | if (err < 0) { |
580 | if (err != -ENOENT) | |
581 | mlog_errno(err); | |
123a9643 | 582 | goto out; |
ccd979bd MF |
583 | } |
584 | ||
585 | fe = (struct ocfs2_dinode *) fe_bh->b_data; | |
586 | if (le16_to_cpu(fe->i_links_count) >= OCFS2_LINK_MAX) { | |
587 | err = -EMLINK; | |
123a9643 | 588 | goto out_unlock_inode; |
ccd979bd MF |
589 | } |
590 | ||
65eff9cc | 591 | handle = ocfs2_start_trans(osb, OCFS2_LINK_CREDITS); |
ccd979bd MF |
592 | if (IS_ERR(handle)) { |
593 | err = PTR_ERR(handle); | |
594 | handle = NULL; | |
595 | mlog_errno(err); | |
123a9643 | 596 | goto out_unlock_inode; |
ccd979bd MF |
597 | } |
598 | ||
599 | err = ocfs2_journal_access(handle, inode, fe_bh, | |
600 | OCFS2_JOURNAL_ACCESS_WRITE); | |
601 | if (err < 0) { | |
602 | mlog_errno(err); | |
123a9643 | 603 | goto out_commit; |
ccd979bd MF |
604 | } |
605 | ||
d8c76e6f | 606 | inc_nlink(inode); |
ccd979bd MF |
607 | inode->i_ctime = CURRENT_TIME; |
608 | fe->i_links_count = cpu_to_le16(inode->i_nlink); | |
609 | fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
610 | fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
611 | ||
612 | err = ocfs2_journal_dirty(handle, fe_bh); | |
613 | if (err < 0) { | |
614 | le16_add_cpu(&fe->i_links_count, -1); | |
9a53c3a7 | 615 | drop_nlink(inode); |
ccd979bd | 616 | mlog_errno(err); |
123a9643 | 617 | goto out_commit; |
ccd979bd MF |
618 | } |
619 | ||
620 | err = ocfs2_add_entry(handle, dentry, inode, | |
621 | OCFS2_I(inode)->ip_blkno, | |
622 | parent_fe_bh, de_bh); | |
623 | if (err) { | |
624 | le16_add_cpu(&fe->i_links_count, -1); | |
9a53c3a7 | 625 | drop_nlink(inode); |
ccd979bd | 626 | mlog_errno(err); |
123a9643 | 627 | goto out_commit; |
ccd979bd MF |
628 | } |
629 | ||
0027dd5b | 630 | err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); |
379dfe9d MF |
631 | if (err) { |
632 | mlog_errno(err); | |
123a9643 | 633 | goto out_commit; |
379dfe9d MF |
634 | } |
635 | ||
ccd979bd MF |
636 | atomic_inc(&inode->i_count); |
637 | dentry->d_op = &ocfs2_dentry_ops; | |
638 | d_instantiate(dentry, inode); | |
123a9643 MF |
639 | |
640 | out_commit: | |
02dc1af4 | 641 | ocfs2_commit_trans(osb, handle); |
123a9643 | 642 | out_unlock_inode: |
e63aecb6 | 643 | ocfs2_inode_unlock(inode, 1); |
123a9643 MF |
644 | |
645 | out: | |
e63aecb6 | 646 | ocfs2_inode_unlock(dir, 1); |
123a9643 | 647 | |
a81cb88b MF |
648 | brelse(de_bh); |
649 | brelse(fe_bh); | |
650 | brelse(parent_fe_bh); | |
ccd979bd MF |
651 | |
652 | mlog_exit(err); | |
653 | ||
654 | return err; | |
655 | } | |
656 | ||
379dfe9d MF |
657 | /* |
658 | * Takes and drops an exclusive lock on the given dentry. This will | |
659 | * force other nodes to drop it. | |
660 | */ | |
661 | static int ocfs2_remote_dentry_delete(struct dentry *dentry) | |
662 | { | |
663 | int ret; | |
664 | ||
665 | ret = ocfs2_dentry_lock(dentry, 1); | |
666 | if (ret) | |
667 | mlog_errno(ret); | |
668 | else | |
669 | ocfs2_dentry_unlock(dentry, 1); | |
670 | ||
671 | return ret; | |
672 | } | |
673 | ||
17ff7856 MF |
674 | static inline int inode_is_unlinkable(struct inode *inode) |
675 | { | |
676 | if (S_ISDIR(inode->i_mode)) { | |
677 | if (inode->i_nlink == 2) | |
678 | return 1; | |
679 | return 0; | |
680 | } | |
681 | ||
682 | if (inode->i_nlink == 1) | |
683 | return 1; | |
684 | return 0; | |
685 | } | |
686 | ||
ccd979bd MF |
687 | static int ocfs2_unlink(struct inode *dir, |
688 | struct dentry *dentry) | |
689 | { | |
690 | int status; | |
30a4f5e8 | 691 | int child_locked = 0; |
ccd979bd | 692 | struct inode *inode = dentry->d_inode; |
5098c27b | 693 | struct inode *orphan_dir = NULL; |
ccd979bd MF |
694 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); |
695 | u64 blkno; | |
696 | struct ocfs2_dinode *fe = NULL; | |
697 | struct buffer_head *fe_bh = NULL; | |
698 | struct buffer_head *parent_node_bh = NULL; | |
1fabe148 | 699 | handle_t *handle = NULL; |
ccd979bd MF |
700 | struct ocfs2_dir_entry *dirent = NULL; |
701 | struct buffer_head *dirent_bh = NULL; | |
702 | char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; | |
703 | struct buffer_head *orphan_entry_bh = NULL; | |
704 | ||
705 | mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry, | |
706 | dentry->d_name.len, dentry->d_name.name); | |
707 | ||
708 | BUG_ON(dentry->d_parent->d_inode != dir); | |
709 | ||
b0697053 | 710 | mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno); |
ccd979bd MF |
711 | |
712 | if (inode == osb->root_inode) { | |
713 | mlog(0, "Cannot delete the root directory\n"); | |
30a4f5e8 | 714 | return -EPERM; |
ccd979bd MF |
715 | } |
716 | ||
e63aecb6 | 717 | status = ocfs2_inode_lock(dir, &parent_node_bh, 1); |
ccd979bd MF |
718 | if (status < 0) { |
719 | if (status != -ENOENT) | |
720 | mlog_errno(status); | |
30a4f5e8 | 721 | return status; |
ccd979bd MF |
722 | } |
723 | ||
724 | status = ocfs2_find_files_on_disk(dentry->d_name.name, | |
725 | dentry->d_name.len, &blkno, | |
726 | dir, &dirent_bh, &dirent); | |
727 | if (status < 0) { | |
728 | if (status != -ENOENT) | |
729 | mlog_errno(status); | |
730 | goto leave; | |
731 | } | |
732 | ||
733 | if (OCFS2_I(inode)->ip_blkno != blkno) { | |
734 | status = -ENOENT; | |
735 | ||
b0697053 MF |
736 | mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n", |
737 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
738 | (unsigned long long)blkno, OCFS2_I(inode)->ip_flags); | |
ccd979bd MF |
739 | goto leave; |
740 | } | |
741 | ||
e63aecb6 | 742 | status = ocfs2_inode_lock(inode, &fe_bh, 1); |
ccd979bd MF |
743 | if (status < 0) { |
744 | if (status != -ENOENT) | |
745 | mlog_errno(status); | |
746 | goto leave; | |
747 | } | |
30a4f5e8 | 748 | child_locked = 1; |
ccd979bd MF |
749 | |
750 | if (S_ISDIR(inode->i_mode)) { | |
751 | if (!ocfs2_empty_dir(inode)) { | |
752 | status = -ENOTEMPTY; | |
753 | goto leave; | |
754 | } else if (inode->i_nlink != 2) { | |
755 | status = -ENOTEMPTY; | |
756 | goto leave; | |
757 | } | |
758 | } | |
759 | ||
379dfe9d | 760 | status = ocfs2_remote_dentry_delete(dentry); |
ccd979bd | 761 | if (status < 0) { |
34d024f8 | 762 | /* This remote delete should succeed under all normal |
ccd979bd MF |
763 | * circumstances. */ |
764 | mlog_errno(status); | |
765 | goto leave; | |
766 | } | |
767 | ||
17ff7856 | 768 | if (inode_is_unlinkable(inode)) { |
5098c27b | 769 | status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, inode, |
ccd979bd MF |
770 | orphan_name, |
771 | &orphan_entry_bh); | |
772 | if (status < 0) { | |
773 | mlog_errno(status); | |
774 | goto leave; | |
775 | } | |
776 | } | |
777 | ||
65eff9cc | 778 | handle = ocfs2_start_trans(osb, OCFS2_UNLINK_CREDITS); |
ccd979bd MF |
779 | if (IS_ERR(handle)) { |
780 | status = PTR_ERR(handle); | |
781 | handle = NULL; | |
782 | mlog_errno(status); | |
783 | goto leave; | |
784 | } | |
785 | ||
786 | status = ocfs2_journal_access(handle, inode, fe_bh, | |
787 | OCFS2_JOURNAL_ACCESS_WRITE); | |
788 | if (status < 0) { | |
789 | mlog_errno(status); | |
790 | goto leave; | |
791 | } | |
792 | ||
793 | fe = (struct ocfs2_dinode *) fe_bh->b_data; | |
794 | ||
17ff7856 | 795 | if (inode_is_unlinkable(inode)) { |
ccd979bd | 796 | status = ocfs2_orphan_add(osb, handle, inode, fe, orphan_name, |
5098c27b | 797 | orphan_entry_bh, orphan_dir); |
ccd979bd MF |
798 | if (status < 0) { |
799 | mlog_errno(status); | |
800 | goto leave; | |
801 | } | |
802 | } | |
803 | ||
804 | /* delete the name from the parent dir */ | |
805 | status = ocfs2_delete_entry(handle, dir, dirent, dirent_bh); | |
806 | if (status < 0) { | |
807 | mlog_errno(status); | |
808 | goto leave; | |
809 | } | |
810 | ||
17ff7856 MF |
811 | if (S_ISDIR(inode->i_mode)) |
812 | drop_nlink(inode); | |
813 | drop_nlink(inode); | |
ccd979bd | 814 | fe->i_links_count = cpu_to_le16(inode->i_nlink); |
ccd979bd MF |
815 | |
816 | status = ocfs2_journal_dirty(handle, fe_bh); | |
817 | if (status < 0) { | |
818 | mlog_errno(status); | |
819 | goto leave; | |
820 | } | |
821 | ||
592282cf MF |
822 | dir->i_ctime = dir->i_mtime = CURRENT_TIME; |
823 | if (S_ISDIR(inode->i_mode)) | |
17ff7856 | 824 | drop_nlink(dir); |
592282cf MF |
825 | |
826 | status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh); | |
827 | if (status < 0) { | |
828 | mlog_errno(status); | |
829 | if (S_ISDIR(inode->i_mode)) | |
d8c76e6f | 830 | inc_nlink(dir); |
ccd979bd MF |
831 | } |
832 | ||
833 | leave: | |
ccd979bd | 834 | if (handle) |
02dc1af4 | 835 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 836 | |
30a4f5e8 | 837 | if (child_locked) |
e63aecb6 | 838 | ocfs2_inode_unlock(inode, 1); |
30a4f5e8 | 839 | |
e63aecb6 | 840 | ocfs2_inode_unlock(dir, 1); |
30a4f5e8 | 841 | |
5098c27b MF |
842 | if (orphan_dir) { |
843 | /* This was locked for us in ocfs2_prepare_orphan_dir() */ | |
e63aecb6 | 844 | ocfs2_inode_unlock(orphan_dir, 1); |
5098c27b MF |
845 | mutex_unlock(&orphan_dir->i_mutex); |
846 | iput(orphan_dir); | |
847 | } | |
848 | ||
a81cb88b MF |
849 | brelse(fe_bh); |
850 | brelse(dirent_bh); | |
851 | brelse(parent_node_bh); | |
852 | brelse(orphan_entry_bh); | |
ccd979bd MF |
853 | |
854 | mlog_exit(status); | |
855 | ||
856 | return status; | |
857 | } | |
858 | ||
859 | /* | |
860 | * The only place this should be used is rename! | |
861 | * if they have the same id, then the 1st one is the only one locked. | |
862 | */ | |
863 | static int ocfs2_double_lock(struct ocfs2_super *osb, | |
ccd979bd MF |
864 | struct buffer_head **bh1, |
865 | struct inode *inode1, | |
866 | struct buffer_head **bh2, | |
867 | struct inode *inode2) | |
868 | { | |
869 | int status; | |
870 | struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); | |
871 | struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); | |
872 | struct buffer_head **tmpbh; | |
873 | struct inode *tmpinode; | |
874 | ||
b0697053 MF |
875 | mlog_entry("(inode1 = %llu, inode2 = %llu)\n", |
876 | (unsigned long long)oi1->ip_blkno, | |
877 | (unsigned long long)oi2->ip_blkno); | |
ccd979bd | 878 | |
ccd979bd MF |
879 | if (*bh1) |
880 | *bh1 = NULL; | |
881 | if (*bh2) | |
882 | *bh2 = NULL; | |
883 | ||
884 | /* we always want to lock the one with the lower lockid first. */ | |
885 | if (oi1->ip_blkno != oi2->ip_blkno) { | |
886 | if (oi1->ip_blkno < oi2->ip_blkno) { | |
887 | /* switch id1 and id2 around */ | |
888 | mlog(0, "switching them around...\n"); | |
889 | tmpbh = bh2; | |
890 | bh2 = bh1; | |
891 | bh1 = tmpbh; | |
892 | ||
893 | tmpinode = inode2; | |
894 | inode2 = inode1; | |
895 | inode1 = tmpinode; | |
896 | } | |
897 | /* lock id2 */ | |
e63aecb6 | 898 | status = ocfs2_inode_lock(inode2, bh2, 1); |
ccd979bd MF |
899 | if (status < 0) { |
900 | if (status != -ENOENT) | |
901 | mlog_errno(status); | |
902 | goto bail; | |
903 | } | |
904 | } | |
8d5596c6 | 905 | |
ccd979bd | 906 | /* lock id1 */ |
e63aecb6 | 907 | status = ocfs2_inode_lock(inode1, bh1, 1); |
ccd979bd | 908 | if (status < 0) { |
8d5596c6 MF |
909 | /* |
910 | * An error return must mean that no cluster locks | |
911 | * were held on function exit. | |
912 | */ | |
913 | if (oi1->ip_blkno != oi2->ip_blkno) | |
e63aecb6 | 914 | ocfs2_inode_unlock(inode2, 1); |
8d5596c6 | 915 | |
ccd979bd MF |
916 | if (status != -ENOENT) |
917 | mlog_errno(status); | |
ccd979bd | 918 | } |
8d5596c6 | 919 | |
ccd979bd MF |
920 | bail: |
921 | mlog_exit(status); | |
922 | return status; | |
923 | } | |
924 | ||
8d5596c6 MF |
925 | static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2) |
926 | { | |
e63aecb6 | 927 | ocfs2_inode_unlock(inode1, 1); |
8d5596c6 MF |
928 | |
929 | if (inode1 != inode2) | |
e63aecb6 | 930 | ocfs2_inode_unlock(inode2, 1); |
8d5596c6 MF |
931 | } |
932 | ||
ccd979bd MF |
933 | static int ocfs2_rename(struct inode *old_dir, |
934 | struct dentry *old_dentry, | |
935 | struct inode *new_dir, | |
936 | struct dentry *new_dentry) | |
937 | { | |
8d5596c6 MF |
938 | int status = 0, rename_lock = 0, parents_locked = 0; |
939 | int old_child_locked = 0, new_child_locked = 0; | |
ccd979bd MF |
940 | struct inode *old_inode = old_dentry->d_inode; |
941 | struct inode *new_inode = new_dentry->d_inode; | |
5098c27b | 942 | struct inode *orphan_dir = NULL; |
ccd979bd MF |
943 | struct ocfs2_dinode *newfe = NULL; |
944 | char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; | |
945 | struct buffer_head *orphan_entry_bh = NULL; | |
946 | struct buffer_head *newfe_bh = NULL; | |
592282cf | 947 | struct buffer_head *old_inode_bh = NULL; |
ccd979bd MF |
948 | struct buffer_head *insert_entry_bh = NULL; |
949 | struct ocfs2_super *osb = NULL; | |
5b6a3a2b | 950 | u64 newfe_blkno, old_de_ino; |
1fabe148 | 951 | handle_t *handle = NULL; |
ccd979bd MF |
952 | struct buffer_head *old_dir_bh = NULL; |
953 | struct buffer_head *new_dir_bh = NULL; | |
38760e24 MF |
954 | struct ocfs2_dir_entry *old_inode_dot_dot_de = NULL, *old_de = NULL, |
955 | *new_de = NULL; | |
ccd979bd MF |
956 | struct buffer_head *new_de_bh = NULL, *old_de_bh = NULL; // bhs for above |
957 | struct buffer_head *old_inode_de_bh = NULL; // if old_dentry is a dir, | |
958 | // this is the 1st dirent bh | |
592282cf | 959 | nlink_t old_dir_nlink = old_dir->i_nlink; |
480214d7 | 960 | struct ocfs2_dinode *old_di; |
ccd979bd MF |
961 | |
962 | /* At some point it might be nice to break this function up a | |
963 | * bit. */ | |
964 | ||
965 | mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n", | |
966 | old_dir, old_dentry, new_dir, new_dentry, | |
967 | old_dentry->d_name.len, old_dentry->d_name.name, | |
968 | new_dentry->d_name.len, new_dentry->d_name.name); | |
969 | ||
970 | osb = OCFS2_SB(old_dir->i_sb); | |
971 | ||
972 | if (new_inode) { | |
973 | if (!igrab(new_inode)) | |
974 | BUG(); | |
975 | } | |
976 | ||
1b3c3714 | 977 | /* Assume a directory hierarchy thusly: |
ccd979bd MF |
978 | * a/b/c |
979 | * a/d | |
980 | * a,b,c, and d are all directories. | |
981 | * | |
982 | * from cwd of 'a' on both nodes: | |
983 | * node1: mv b/c d | |
984 | * node2: mv d b/c | |
985 | * | |
986 | * And that's why, just like the VFS, we need a file system | |
987 | * rename lock. */ | |
5dabd695 | 988 | if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) { |
ccd979bd MF |
989 | status = ocfs2_rename_lock(osb); |
990 | if (status < 0) { | |
991 | mlog_errno(status); | |
992 | goto bail; | |
993 | } | |
994 | rename_lock = 1; | |
995 | } | |
996 | ||
ccd979bd | 997 | /* if old and new are the same, this'll just do one lock. */ |
8d5596c6 MF |
998 | status = ocfs2_double_lock(osb, &old_dir_bh, old_dir, |
999 | &new_dir_bh, new_dir); | |
ccd979bd MF |
1000 | if (status < 0) { |
1001 | mlog_errno(status); | |
1002 | goto bail; | |
1003 | } | |
8d5596c6 | 1004 | parents_locked = 1; |
ccd979bd MF |
1005 | |
1006 | /* make sure both dirs have bhs | |
1007 | * get an extra ref on old_dir_bh if old==new */ | |
1008 | if (!new_dir_bh) { | |
1009 | if (old_dir_bh) { | |
1010 | new_dir_bh = old_dir_bh; | |
1011 | get_bh(new_dir_bh); | |
1012 | } else { | |
1013 | mlog(ML_ERROR, "no old_dir_bh!\n"); | |
1014 | status = -EIO; | |
1015 | goto bail; | |
1016 | } | |
1017 | } | |
1018 | ||
379dfe9d | 1019 | /* |
592282cf | 1020 | * Aside from allowing a meta data update, the locking here |
34d024f8 MF |
1021 | * also ensures that the downconvert thread on other nodes |
1022 | * won't have to concurrently downconvert the inode and the | |
1023 | * dentry locks. | |
379dfe9d | 1024 | */ |
e63aecb6 | 1025 | status = ocfs2_inode_lock(old_inode, &old_inode_bh, 1); |
379dfe9d MF |
1026 | if (status < 0) { |
1027 | if (status != -ENOENT) | |
ccd979bd | 1028 | mlog_errno(status); |
379dfe9d MF |
1029 | goto bail; |
1030 | } | |
8d5596c6 | 1031 | old_child_locked = 1; |
ccd979bd | 1032 | |
379dfe9d MF |
1033 | status = ocfs2_remote_dentry_delete(old_dentry); |
1034 | if (status < 0) { | |
1035 | mlog_errno(status); | |
1036 | goto bail; | |
1037 | } | |
1038 | ||
1039 | if (S_ISDIR(old_inode->i_mode)) { | |
38760e24 MF |
1040 | u64 old_inode_parent; |
1041 | ||
1042 | status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent, | |
1043 | old_inode, &old_inode_de_bh, | |
1044 | &old_inode_dot_dot_de); | |
1045 | if (status) { | |
1046 | status = -EIO; | |
ccd979bd | 1047 | goto bail; |
38760e24 | 1048 | } |
ccd979bd | 1049 | |
38760e24 MF |
1050 | if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) { |
1051 | status = -EIO; | |
ccd979bd | 1052 | goto bail; |
38760e24 MF |
1053 | } |
1054 | ||
1055 | if (!new_inode && new_dir != old_dir && | |
1056 | new_dir->i_nlink >= OCFS2_LINK_MAX) { | |
1057 | status = -EMLINK; | |
ccd979bd | 1058 | goto bail; |
38760e24 | 1059 | } |
ccd979bd MF |
1060 | } |
1061 | ||
5b6a3a2b MF |
1062 | status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, |
1063 | old_dentry->d_name.len, | |
1064 | &old_de_ino); | |
1065 | if (status) { | |
1066 | status = -ENOENT; | |
ccd979bd | 1067 | goto bail; |
5b6a3a2b | 1068 | } |
ccd979bd MF |
1069 | |
1070 | /* | |
1071 | * Check for inode number is _not_ due to possible IO errors. | |
1072 | * We might rmdir the source, keep it as pwd of some process | |
1073 | * and merrily kill the link to whatever was created under the | |
1074 | * same name. Goodbye sticky bit ;-< | |
1075 | */ | |
5b6a3a2b MF |
1076 | if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) { |
1077 | status = -ENOENT; | |
ccd979bd | 1078 | goto bail; |
5b6a3a2b | 1079 | } |
ccd979bd MF |
1080 | |
1081 | /* check if the target already exists (in which case we need | |
1082 | * to delete it */ | |
1083 | status = ocfs2_find_files_on_disk(new_dentry->d_name.name, | |
1084 | new_dentry->d_name.len, | |
1085 | &newfe_blkno, new_dir, &new_de_bh, | |
1086 | &new_de); | |
1087 | /* The only error we allow here is -ENOENT because the new | |
1088 | * file not existing is perfectly valid. */ | |
1089 | if ((status < 0) && (status != -ENOENT)) { | |
1090 | /* If we cannot find the file specified we should just */ | |
1091 | /* return the error... */ | |
1092 | mlog_errno(status); | |
1093 | goto bail; | |
1094 | } | |
1095 | ||
e325a88f SE |
1096 | if (!new_de && new_inode) { |
1097 | /* | |
1098 | * Target was unlinked by another node while we were | |
1099 | * waiting to get to ocfs2_rename(). There isn't | |
1100 | * anything we can do here to help the situation, so | |
1101 | * bubble up the appropriate error. | |
1102 | */ | |
1103 | status = -ENOENT; | |
1104 | goto bail; | |
1105 | } | |
ccd979bd MF |
1106 | |
1107 | /* In case we need to overwrite an existing file, we blow it | |
1108 | * away first */ | |
1109 | if (new_de) { | |
1110 | /* VFS didn't think there existed an inode here, but | |
1111 | * someone else in the cluster must have raced our | |
1112 | * rename to create one. Today we error cleanly, in | |
1113 | * the future we should consider calling iget to build | |
1114 | * a new struct inode for this entry. */ | |
1115 | if (!new_inode) { | |
1116 | status = -EACCES; | |
1117 | ||
1118 | mlog(0, "We found an inode for name %.*s but VFS " | |
1119 | "didn't give us one.\n", new_dentry->d_name.len, | |
1120 | new_dentry->d_name.name); | |
1121 | goto bail; | |
1122 | } | |
1123 | ||
1124 | if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { | |
1125 | status = -EACCES; | |
1126 | ||
b0697053 MF |
1127 | mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n", |
1128 | (unsigned long long)OCFS2_I(new_inode)->ip_blkno, | |
1129 | (unsigned long long)newfe_blkno, | |
ccd979bd MF |
1130 | OCFS2_I(new_inode)->ip_flags); |
1131 | goto bail; | |
1132 | } | |
1133 | ||
e63aecb6 | 1134 | status = ocfs2_inode_lock(new_inode, &newfe_bh, 1); |
ccd979bd MF |
1135 | if (status < 0) { |
1136 | if (status != -ENOENT) | |
1137 | mlog_errno(status); | |
1138 | goto bail; | |
1139 | } | |
8d5596c6 | 1140 | new_child_locked = 1; |
ccd979bd | 1141 | |
379dfe9d | 1142 | status = ocfs2_remote_dentry_delete(new_dentry); |
ccd979bd MF |
1143 | if (status < 0) { |
1144 | mlog_errno(status); | |
1145 | goto bail; | |
1146 | } | |
1147 | ||
1148 | newfe = (struct ocfs2_dinode *) newfe_bh->b_data; | |
1149 | ||
b0697053 MF |
1150 | mlog(0, "aha rename over existing... new_de=%p new_blkno=%llu " |
1151 | "newfebh=%p bhblocknr=%llu\n", new_de, | |
1152 | (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? | |
ccd979bd MF |
1153 | (unsigned long long)newfe_bh->b_blocknr : 0ULL); |
1154 | ||
1155 | if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { | |
5098c27b | 1156 | status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, |
ccd979bd MF |
1157 | new_inode, |
1158 | orphan_name, | |
1159 | &orphan_entry_bh); | |
1160 | if (status < 0) { | |
1161 | mlog_errno(status); | |
1162 | goto bail; | |
1163 | } | |
1164 | } | |
1165 | } else { | |
1166 | BUG_ON(new_dentry->d_parent->d_inode != new_dir); | |
1167 | ||
1168 | status = ocfs2_check_dir_for_entry(new_dir, | |
1169 | new_dentry->d_name.name, | |
1170 | new_dentry->d_name.len); | |
1171 | if (status) | |
1172 | goto bail; | |
1173 | ||
1174 | status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, | |
1175 | new_dentry->d_name.name, | |
1176 | new_dentry->d_name.len, | |
1177 | &insert_entry_bh); | |
1178 | if (status < 0) { | |
1179 | mlog_errno(status); | |
1180 | goto bail; | |
1181 | } | |
1182 | } | |
1183 | ||
65eff9cc | 1184 | handle = ocfs2_start_trans(osb, OCFS2_RENAME_CREDITS); |
ccd979bd MF |
1185 | if (IS_ERR(handle)) { |
1186 | status = PTR_ERR(handle); | |
1187 | handle = NULL; | |
1188 | mlog_errno(status); | |
1189 | goto bail; | |
1190 | } | |
1191 | ||
1192 | if (new_de) { | |
1193 | if (S_ISDIR(new_inode->i_mode)) { | |
1194 | if (!ocfs2_empty_dir(new_inode) || | |
1195 | new_inode->i_nlink != 2) { | |
1196 | status = -ENOTEMPTY; | |
1197 | goto bail; | |
1198 | } | |
1199 | } | |
1200 | status = ocfs2_journal_access(handle, new_inode, newfe_bh, | |
1201 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1202 | if (status < 0) { | |
1203 | mlog_errno(status); | |
1204 | goto bail; | |
1205 | } | |
1206 | ||
1207 | if (S_ISDIR(new_inode->i_mode) || | |
1208 | (newfe->i_links_count == cpu_to_le16(1))){ | |
1209 | status = ocfs2_orphan_add(osb, handle, new_inode, | |
1210 | newfe, orphan_name, | |
5098c27b | 1211 | orphan_entry_bh, orphan_dir); |
ccd979bd MF |
1212 | if (status < 0) { |
1213 | mlog_errno(status); | |
1214 | goto bail; | |
1215 | } | |
1216 | } | |
1217 | ||
1218 | /* change the dirent to point to the correct inode */ | |
38760e24 MF |
1219 | status = ocfs2_update_entry(new_dir, handle, new_de_bh, |
1220 | new_de, old_inode); | |
ccd979bd MF |
1221 | if (status < 0) { |
1222 | mlog_errno(status); | |
1223 | goto bail; | |
1224 | } | |
ccd979bd | 1225 | new_dir->i_version++; |
ccd979bd MF |
1226 | |
1227 | if (S_ISDIR(new_inode->i_mode)) | |
1228 | newfe->i_links_count = 0; | |
1229 | else | |
1230 | le16_add_cpu(&newfe->i_links_count, -1); | |
1231 | ||
1232 | status = ocfs2_journal_dirty(handle, newfe_bh); | |
1233 | if (status < 0) { | |
1234 | mlog_errno(status); | |
1235 | goto bail; | |
1236 | } | |
1237 | } else { | |
1238 | /* if the name was not found in new_dir, add it now */ | |
1239 | status = ocfs2_add_entry(handle, new_dentry, old_inode, | |
1240 | OCFS2_I(old_inode)->ip_blkno, | |
1241 | new_dir_bh, insert_entry_bh); | |
1242 | } | |
1243 | ||
1244 | old_inode->i_ctime = CURRENT_TIME; | |
1245 | mark_inode_dirty(old_inode); | |
480214d7 SM |
1246 | |
1247 | status = ocfs2_journal_access(handle, old_inode, old_inode_bh, | |
1248 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1249 | if (status >= 0) { | |
1250 | old_di = (struct ocfs2_dinode *) old_inode_bh->b_data; | |
1251 | ||
1252 | old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec); | |
1253 | old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec); | |
1254 | ||
1255 | status = ocfs2_journal_dirty(handle, old_inode_bh); | |
1256 | if (status < 0) | |
1257 | mlog_errno(status); | |
1258 | } else | |
1259 | mlog_errno(status); | |
ccd979bd | 1260 | |
5b6a3a2b MF |
1261 | /* |
1262 | * Now that the name has been added to new_dir, remove the old name. | |
1263 | * | |
1264 | * We don't keep any directory entry context around until now | |
1265 | * because the insert might have changed the type of directory | |
1266 | * we're dealing with. | |
1267 | */ | |
1268 | old_de_bh = ocfs2_find_entry(old_dentry->d_name.name, | |
1269 | old_dentry->d_name.len, | |
1270 | old_dir, &old_de); | |
1271 | if (!old_de_bh) { | |
1272 | status = -EIO; | |
1273 | goto bail; | |
1274 | } | |
1275 | ||
ccd979bd MF |
1276 | status = ocfs2_delete_entry(handle, old_dir, old_de, old_de_bh); |
1277 | if (status < 0) { | |
1278 | mlog_errno(status); | |
1279 | goto bail; | |
1280 | } | |
1281 | ||
1282 | if (new_inode) { | |
1283 | new_inode->i_nlink--; | |
1284 | new_inode->i_ctime = CURRENT_TIME; | |
1285 | } | |
1286 | old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME; | |
1287 | if (old_inode_de_bh) { | |
38760e24 MF |
1288 | status = ocfs2_update_entry(old_inode, handle, old_inode_de_bh, |
1289 | old_inode_dot_dot_de, new_dir); | |
ccd979bd MF |
1290 | old_dir->i_nlink--; |
1291 | if (new_inode) { | |
1292 | new_inode->i_nlink--; | |
1293 | } else { | |
d8c76e6f | 1294 | inc_nlink(new_dir); |
ccd979bd MF |
1295 | mark_inode_dirty(new_dir); |
1296 | } | |
1297 | } | |
1298 | mark_inode_dirty(old_dir); | |
592282cf MF |
1299 | ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh); |
1300 | if (new_inode) { | |
ccd979bd | 1301 | mark_inode_dirty(new_inode); |
592282cf MF |
1302 | ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh); |
1303 | } | |
ccd979bd | 1304 | |
592282cf MF |
1305 | if (old_dir != new_dir) { |
1306 | /* Keep the same times on both directories.*/ | |
1307 | new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime; | |
1308 | ||
1309 | /* | |
1310 | * This will also pick up the i_nlink change from the | |
1311 | * block above. | |
1312 | */ | |
1313 | ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh); | |
1314 | } | |
ccd979bd MF |
1315 | |
1316 | if (old_dir_nlink != old_dir->i_nlink) { | |
1317 | if (!old_dir_bh) { | |
1318 | mlog(ML_ERROR, "need to change nlink for old dir " | |
b0697053 MF |
1319 | "%llu from %d to %d but bh is NULL!\n", |
1320 | (unsigned long long)OCFS2_I(old_dir)->ip_blkno, | |
1321 | (int)old_dir_nlink, old_dir->i_nlink); | |
ccd979bd MF |
1322 | } else { |
1323 | struct ocfs2_dinode *fe; | |
1324 | status = ocfs2_journal_access(handle, old_dir, | |
1325 | old_dir_bh, | |
1326 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1327 | fe = (struct ocfs2_dinode *) old_dir_bh->b_data; | |
1328 | fe->i_links_count = cpu_to_le16(old_dir->i_nlink); | |
1329 | status = ocfs2_journal_dirty(handle, old_dir_bh); | |
1330 | } | |
1331 | } | |
1332 | ||
379dfe9d | 1333 | ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); |
ccd979bd MF |
1334 | status = 0; |
1335 | bail: | |
1336 | if (rename_lock) | |
1337 | ocfs2_rename_unlock(osb); | |
1338 | ||
1339 | if (handle) | |
02dc1af4 | 1340 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 1341 | |
8d5596c6 MF |
1342 | if (parents_locked) |
1343 | ocfs2_double_unlock(old_dir, new_dir); | |
1344 | ||
1345 | if (old_child_locked) | |
e63aecb6 | 1346 | ocfs2_inode_unlock(old_inode, 1); |
8d5596c6 MF |
1347 | |
1348 | if (new_child_locked) | |
e63aecb6 | 1349 | ocfs2_inode_unlock(new_inode, 1); |
8d5596c6 | 1350 | |
5098c27b MF |
1351 | if (orphan_dir) { |
1352 | /* This was locked for us in ocfs2_prepare_orphan_dir() */ | |
e63aecb6 | 1353 | ocfs2_inode_unlock(orphan_dir, 1); |
5098c27b MF |
1354 | mutex_unlock(&orphan_dir->i_mutex); |
1355 | iput(orphan_dir); | |
1356 | } | |
1357 | ||
ccd979bd MF |
1358 | if (new_inode) |
1359 | sync_mapping_buffers(old_inode->i_mapping); | |
1360 | ||
1361 | if (new_inode) | |
1362 | iput(new_inode); | |
a81cb88b MF |
1363 | brelse(newfe_bh); |
1364 | brelse(old_inode_bh); | |
1365 | brelse(old_dir_bh); | |
1366 | brelse(new_dir_bh); | |
1367 | brelse(new_de_bh); | |
1368 | brelse(old_de_bh); | |
1369 | brelse(old_inode_de_bh); | |
1370 | brelse(orphan_entry_bh); | |
1371 | brelse(insert_entry_bh); | |
ccd979bd MF |
1372 | |
1373 | mlog_exit(status); | |
1374 | ||
1375 | return status; | |
1376 | } | |
1377 | ||
1378 | /* | |
1379 | * we expect i_size = strlen(symname). Copy symname into the file | |
1380 | * data, including the null terminator. | |
1381 | */ | |
1382 | static int ocfs2_create_symlink_data(struct ocfs2_super *osb, | |
1fabe148 | 1383 | handle_t *handle, |
ccd979bd MF |
1384 | struct inode *inode, |
1385 | const char *symname) | |
1386 | { | |
1387 | struct buffer_head **bhs = NULL; | |
1388 | const char *c; | |
1389 | struct super_block *sb = osb->sb; | |
4f902c37 | 1390 | u64 p_blkno, p_blocks; |
ccd979bd MF |
1391 | int virtual, blocks, status, i, bytes_left; |
1392 | ||
1393 | bytes_left = i_size_read(inode) + 1; | |
1394 | /* we can't trust i_blocks because we're actually going to | |
1395 | * write i_size + 1 bytes. */ | |
1396 | blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; | |
1397 | ||
5515eff8 AM |
1398 | mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n", |
1399 | (unsigned long long)inode->i_blocks, | |
1400 | i_size_read(inode), blocks); | |
ccd979bd MF |
1401 | |
1402 | /* Sanity check -- make sure we're going to fit. */ | |
1403 | if (bytes_left > | |
1404 | ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { | |
1405 | status = -EIO; | |
1406 | mlog_errno(status); | |
1407 | goto bail; | |
1408 | } | |
1409 | ||
1410 | bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); | |
1411 | if (!bhs) { | |
1412 | status = -ENOMEM; | |
1413 | mlog_errno(status); | |
1414 | goto bail; | |
1415 | } | |
1416 | ||
49cb8d2d MF |
1417 | status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks, |
1418 | NULL); | |
ccd979bd MF |
1419 | if (status < 0) { |
1420 | mlog_errno(status); | |
1421 | goto bail; | |
1422 | } | |
1423 | ||
1424 | /* links can never be larger than one cluster so we know this | |
1425 | * is all going to be contiguous, but do a sanity check | |
1426 | * anyway. */ | |
1427 | if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { | |
1428 | status = -EIO; | |
1429 | mlog_errno(status); | |
1430 | goto bail; | |
1431 | } | |
1432 | ||
1433 | virtual = 0; | |
1434 | while(bytes_left > 0) { | |
1435 | c = &symname[virtual * sb->s_blocksize]; | |
1436 | ||
1437 | bhs[virtual] = sb_getblk(sb, p_blkno); | |
1438 | if (!bhs[virtual]) { | |
1439 | status = -ENOMEM; | |
1440 | mlog_errno(status); | |
1441 | goto bail; | |
1442 | } | |
1443 | ocfs2_set_new_buffer_uptodate(inode, bhs[virtual]); | |
1444 | ||
1445 | status = ocfs2_journal_access(handle, inode, bhs[virtual], | |
1446 | OCFS2_JOURNAL_ACCESS_CREATE); | |
1447 | if (status < 0) { | |
1448 | mlog_errno(status); | |
1449 | goto bail; | |
1450 | } | |
1451 | ||
1452 | memset(bhs[virtual]->b_data, 0, sb->s_blocksize); | |
1453 | ||
1454 | memcpy(bhs[virtual]->b_data, c, | |
1455 | (bytes_left > sb->s_blocksize) ? sb->s_blocksize : | |
1456 | bytes_left); | |
1457 | ||
1458 | status = ocfs2_journal_dirty(handle, bhs[virtual]); | |
1459 | if (status < 0) { | |
1460 | mlog_errno(status); | |
1461 | goto bail; | |
1462 | } | |
1463 | ||
1464 | virtual++; | |
1465 | p_blkno++; | |
1466 | bytes_left -= sb->s_blocksize; | |
1467 | } | |
1468 | ||
1469 | status = 0; | |
1470 | bail: | |
1471 | ||
1472 | if (bhs) { | |
1473 | for(i = 0; i < blocks; i++) | |
a81cb88b | 1474 | brelse(bhs[i]); |
ccd979bd MF |
1475 | kfree(bhs); |
1476 | } | |
1477 | ||
1478 | mlog_exit(status); | |
1479 | return status; | |
1480 | } | |
1481 | ||
1482 | static int ocfs2_symlink(struct inode *dir, | |
1483 | struct dentry *dentry, | |
1484 | const char *symname) | |
1485 | { | |
1486 | int status, l, credits; | |
1487 | u64 newsize; | |
1488 | struct ocfs2_super *osb = NULL; | |
1489 | struct inode *inode = NULL; | |
1490 | struct super_block *sb; | |
1491 | struct buffer_head *new_fe_bh = NULL; | |
1492 | struct buffer_head *de_bh = NULL; | |
1493 | struct buffer_head *parent_fe_bh = NULL; | |
1494 | struct ocfs2_dinode *fe = NULL; | |
1495 | struct ocfs2_dinode *dirfe; | |
1fabe148 | 1496 | handle_t *handle = NULL; |
ccd979bd MF |
1497 | struct ocfs2_alloc_context *inode_ac = NULL; |
1498 | struct ocfs2_alloc_context *data_ac = NULL; | |
1499 | ||
1500 | mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir, | |
1501 | dentry, symname, dentry->d_name.len, dentry->d_name.name); | |
1502 | ||
1503 | sb = dir->i_sb; | |
1504 | osb = OCFS2_SB(sb); | |
1505 | ||
1506 | l = strlen(symname) + 1; | |
1507 | ||
1508 | credits = ocfs2_calc_symlink_credits(sb); | |
1509 | ||
ccd979bd | 1510 | /* lock the parent directory */ |
e63aecb6 | 1511 | status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); |
ccd979bd MF |
1512 | if (status < 0) { |
1513 | if (status != -ENOENT) | |
1514 | mlog_errno(status); | |
6d8fc40e | 1515 | return status; |
ccd979bd MF |
1516 | } |
1517 | ||
1518 | dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; | |
1519 | if (!dirfe->i_links_count) { | |
1520 | /* can't make a file in a deleted directory. */ | |
1521 | status = -ENOENT; | |
1522 | goto bail; | |
1523 | } | |
1524 | ||
1525 | status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, | |
1526 | dentry->d_name.len); | |
1527 | if (status) | |
1528 | goto bail; | |
1529 | ||
1530 | status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, | |
1531 | dentry->d_name.name, | |
1532 | dentry->d_name.len, &de_bh); | |
1533 | if (status < 0) { | |
1534 | mlog_errno(status); | |
1535 | goto bail; | |
1536 | } | |
1537 | ||
da5cbf2f | 1538 | status = ocfs2_reserve_new_inode(osb, &inode_ac); |
ccd979bd MF |
1539 | if (status < 0) { |
1540 | if (status != -ENOSPC) | |
1541 | mlog_errno(status); | |
1542 | goto bail; | |
1543 | } | |
1544 | ||
1545 | /* don't reserve bitmap space for fast symlinks. */ | |
1546 | if (l > ocfs2_fast_symlink_chars(sb)) { | |
da5cbf2f | 1547 | status = ocfs2_reserve_clusters(osb, 1, &data_ac); |
ccd979bd MF |
1548 | if (status < 0) { |
1549 | if (status != -ENOSPC) | |
1550 | mlog_errno(status); | |
1551 | goto bail; | |
1552 | } | |
1553 | } | |
1554 | ||
65eff9cc | 1555 | handle = ocfs2_start_trans(osb, credits); |
ccd979bd MF |
1556 | if (IS_ERR(handle)) { |
1557 | status = PTR_ERR(handle); | |
1558 | handle = NULL; | |
1559 | mlog_errno(status); | |
1560 | goto bail; | |
1561 | } | |
1562 | ||
1563 | status = ocfs2_mknod_locked(osb, dir, dentry, | |
1564 | S_IFLNK | S_IRWXUGO, 0, | |
1565 | &new_fe_bh, parent_fe_bh, handle, | |
1566 | &inode, inode_ac); | |
1567 | if (status < 0) { | |
1568 | mlog_errno(status); | |
1569 | goto bail; | |
1570 | } | |
1571 | ||
1572 | fe = (struct ocfs2_dinode *) new_fe_bh->b_data; | |
1573 | inode->i_rdev = 0; | |
1574 | newsize = l - 1; | |
1575 | if (l > ocfs2_fast_symlink_chars(sb)) { | |
dcd0538f MF |
1576 | u32 offset = 0; |
1577 | ||
ccd979bd | 1578 | inode->i_op = &ocfs2_symlink_inode_operations; |
0eb8d47e TM |
1579 | status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0, |
1580 | new_fe_bh, | |
1581 | handle, data_ac, NULL, | |
1582 | NULL); | |
ccd979bd MF |
1583 | if (status < 0) { |
1584 | if (status != -ENOSPC && status != -EINTR) { | |
b0697053 MF |
1585 | mlog(ML_ERROR, |
1586 | "Failed to extend file to %llu\n", | |
1587 | (unsigned long long)newsize); | |
ccd979bd MF |
1588 | mlog_errno(status); |
1589 | status = -ENOSPC; | |
1590 | } | |
1591 | goto bail; | |
1592 | } | |
1593 | i_size_write(inode, newsize); | |
8110b073 | 1594 | inode->i_blocks = ocfs2_inode_sector_count(inode); |
ccd979bd MF |
1595 | } else { |
1596 | inode->i_op = &ocfs2_fast_symlink_inode_operations; | |
1597 | memcpy((char *) fe->id2.i_symlink, symname, l); | |
1598 | i_size_write(inode, newsize); | |
1599 | inode->i_blocks = 0; | |
1600 | } | |
1601 | ||
1602 | status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); | |
1603 | if (status < 0) { | |
1604 | mlog_errno(status); | |
1605 | goto bail; | |
1606 | } | |
1607 | ||
1608 | if (!ocfs2_inode_is_fast_symlink(inode)) { | |
1609 | status = ocfs2_create_symlink_data(osb, handle, inode, | |
1610 | symname); | |
1611 | if (status < 0) { | |
1612 | mlog_errno(status); | |
1613 | goto bail; | |
1614 | } | |
1615 | } | |
1616 | ||
1617 | status = ocfs2_add_entry(handle, dentry, inode, | |
1618 | le64_to_cpu(fe->i_blkno), parent_fe_bh, | |
1619 | de_bh); | |
1620 | if (status < 0) { | |
1621 | mlog_errno(status); | |
1622 | goto bail; | |
1623 | } | |
1624 | ||
0027dd5b | 1625 | status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); |
379dfe9d MF |
1626 | if (status) { |
1627 | mlog_errno(status); | |
1628 | goto bail; | |
1629 | } | |
1630 | ||
ccd979bd MF |
1631 | insert_inode_hash(inode); |
1632 | dentry->d_op = &ocfs2_dentry_ops; | |
1633 | d_instantiate(dentry, inode); | |
1634 | bail: | |
1635 | if (handle) | |
02dc1af4 | 1636 | ocfs2_commit_trans(osb, handle); |
6d8fc40e | 1637 | |
e63aecb6 | 1638 | ocfs2_inode_unlock(dir, 1); |
6d8fc40e | 1639 | |
a81cb88b MF |
1640 | brelse(new_fe_bh); |
1641 | brelse(parent_fe_bh); | |
1642 | brelse(de_bh); | |
ccd979bd MF |
1643 | if (inode_ac) |
1644 | ocfs2_free_alloc_context(inode_ac); | |
1645 | if (data_ac) | |
1646 | ocfs2_free_alloc_context(data_ac); | |
1647 | if ((status < 0) && inode) | |
1648 | iput(inode); | |
1649 | ||
1650 | mlog_exit(status); | |
1651 | ||
1652 | return status; | |
1653 | } | |
1654 | ||
ccd979bd MF |
1655 | static int ocfs2_blkno_stringify(u64 blkno, char *name) |
1656 | { | |
1657 | int status, namelen; | |
1658 | ||
1659 | mlog_entry_void(); | |
1660 | ||
b0697053 MF |
1661 | namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", |
1662 | (long long)blkno); | |
ccd979bd MF |
1663 | if (namelen <= 0) { |
1664 | if (namelen) | |
1665 | status = namelen; | |
1666 | else | |
1667 | status = -EINVAL; | |
1668 | mlog_errno(status); | |
1669 | goto bail; | |
1670 | } | |
1671 | if (namelen != OCFS2_ORPHAN_NAMELEN) { | |
1672 | status = -EINVAL; | |
1673 | mlog_errno(status); | |
1674 | goto bail; | |
1675 | } | |
1676 | ||
1677 | mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name, | |
1678 | namelen); | |
1679 | ||
1680 | status = 0; | |
1681 | bail: | |
1682 | mlog_exit(status); | |
1683 | return status; | |
1684 | } | |
1685 | ||
1686 | static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, | |
5098c27b | 1687 | struct inode **ret_orphan_dir, |
ccd979bd MF |
1688 | struct inode *inode, |
1689 | char *name, | |
1690 | struct buffer_head **de_bh) | |
1691 | { | |
5098c27b | 1692 | struct inode *orphan_dir_inode; |
ccd979bd MF |
1693 | struct buffer_head *orphan_dir_bh = NULL; |
1694 | int status = 0; | |
1695 | ||
1696 | status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); | |
1697 | if (status < 0) { | |
1698 | mlog_errno(status); | |
5098c27b | 1699 | return status; |
ccd979bd MF |
1700 | } |
1701 | ||
1702 | orphan_dir_inode = ocfs2_get_system_file_inode(osb, | |
1703 | ORPHAN_DIR_SYSTEM_INODE, | |
1704 | osb->slot_num); | |
1705 | if (!orphan_dir_inode) { | |
1706 | status = -ENOENT; | |
1707 | mlog_errno(status); | |
5098c27b | 1708 | return status; |
ccd979bd MF |
1709 | } |
1710 | ||
5098c27b MF |
1711 | mutex_lock(&orphan_dir_inode->i_mutex); |
1712 | ||
e63aecb6 | 1713 | status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); |
ccd979bd MF |
1714 | if (status < 0) { |
1715 | mlog_errno(status); | |
1716 | goto leave; | |
1717 | } | |
1718 | ||
1719 | status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, | |
1720 | orphan_dir_bh, name, | |
1721 | OCFS2_ORPHAN_NAMELEN, de_bh); | |
1722 | if (status < 0) { | |
e63aecb6 | 1723 | ocfs2_inode_unlock(orphan_dir_inode, 1); |
5098c27b | 1724 | |
ccd979bd MF |
1725 | mlog_errno(status); |
1726 | goto leave; | |
1727 | } | |
1728 | ||
5098c27b MF |
1729 | *ret_orphan_dir = orphan_dir_inode; |
1730 | ||
ccd979bd | 1731 | leave: |
5098c27b MF |
1732 | if (status) { |
1733 | mutex_unlock(&orphan_dir_inode->i_mutex); | |
ccd979bd | 1734 | iput(orphan_dir_inode); |
5098c27b | 1735 | } |
ccd979bd | 1736 | |
a81cb88b | 1737 | brelse(orphan_dir_bh); |
ccd979bd MF |
1738 | |
1739 | mlog_exit(status); | |
1740 | return status; | |
1741 | } | |
1742 | ||
1743 | static int ocfs2_orphan_add(struct ocfs2_super *osb, | |
1fabe148 | 1744 | handle_t *handle, |
ccd979bd MF |
1745 | struct inode *inode, |
1746 | struct ocfs2_dinode *fe, | |
1747 | char *name, | |
5098c27b MF |
1748 | struct buffer_head *de_bh, |
1749 | struct inode *orphan_dir_inode) | |
ccd979bd | 1750 | { |
ccd979bd MF |
1751 | struct buffer_head *orphan_dir_bh = NULL; |
1752 | int status = 0; | |
1753 | struct ocfs2_dinode *orphan_fe; | |
1754 | ||
1755 | mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino); | |
1756 | ||
31d33073 | 1757 | status = ocfs2_read_block(orphan_dir_inode, |
ccd979bd | 1758 | OCFS2_I(orphan_dir_inode)->ip_blkno, |
0fcaa56a | 1759 | &orphan_dir_bh); |
ccd979bd MF |
1760 | if (status < 0) { |
1761 | mlog_errno(status); | |
1762 | goto leave; | |
1763 | } | |
1764 | ||
1765 | status = ocfs2_journal_access(handle, orphan_dir_inode, orphan_dir_bh, | |
1766 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1767 | if (status < 0) { | |
1768 | mlog_errno(status); | |
1769 | goto leave; | |
1770 | } | |
1771 | ||
1772 | /* we're a cluster, and nlink can change on disk from | |
1773 | * underneath us... */ | |
1774 | orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; | |
1775 | if (S_ISDIR(inode->i_mode)) | |
1776 | le16_add_cpu(&orphan_fe->i_links_count, 1); | |
1777 | orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count); | |
1778 | ||
1779 | status = ocfs2_journal_dirty(handle, orphan_dir_bh); | |
1780 | if (status < 0) { | |
1781 | mlog_errno(status); | |
1782 | goto leave; | |
1783 | } | |
1784 | ||
1785 | status = __ocfs2_add_entry(handle, orphan_dir_inode, name, | |
1786 | OCFS2_ORPHAN_NAMELEN, inode, | |
1787 | OCFS2_I(inode)->ip_blkno, | |
1788 | orphan_dir_bh, de_bh); | |
1789 | if (status < 0) { | |
1790 | mlog_errno(status); | |
1791 | goto leave; | |
1792 | } | |
1793 | ||
1794 | le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL); | |
1795 | ||
1796 | /* Record which orphan dir our inode now resides | |
1797 | * in. delete_inode will use this to determine which orphan | |
1798 | * dir to lock. */ | |
50008630 | 1799 | fe->i_orphaned_slot = cpu_to_le16(osb->slot_num); |
ccd979bd | 1800 | |
b0697053 MF |
1801 | mlog(0, "Inode %llu orphaned in slot %d\n", |
1802 | (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num); | |
ccd979bd MF |
1803 | |
1804 | leave: | |
a81cb88b | 1805 | brelse(orphan_dir_bh); |
ccd979bd MF |
1806 | |
1807 | mlog_exit(status); | |
1808 | return status; | |
1809 | } | |
1810 | ||
1811 | /* unlike orphan_add, we expect the orphan dir to already be locked here. */ | |
1812 | int ocfs2_orphan_del(struct ocfs2_super *osb, | |
1fabe148 | 1813 | handle_t *handle, |
ccd979bd MF |
1814 | struct inode *orphan_dir_inode, |
1815 | struct inode *inode, | |
1816 | struct buffer_head *orphan_dir_bh) | |
1817 | { | |
1818 | char name[OCFS2_ORPHAN_NAMELEN + 1]; | |
1819 | struct ocfs2_dinode *orphan_fe; | |
1820 | int status = 0; | |
1821 | struct buffer_head *target_de_bh = NULL; | |
1822 | struct ocfs2_dir_entry *target_de = NULL; | |
1823 | ||
1824 | mlog_entry_void(); | |
1825 | ||
1826 | status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); | |
1827 | if (status < 0) { | |
1828 | mlog_errno(status); | |
1829 | goto leave; | |
1830 | } | |
1831 | ||
b0697053 MF |
1832 | mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n", |
1833 | name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, | |
1834 | OCFS2_ORPHAN_NAMELEN); | |
ccd979bd MF |
1835 | |
1836 | /* find it's spot in the orphan directory */ | |
1837 | target_de_bh = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, | |
1838 | orphan_dir_inode, &target_de); | |
1839 | if (!target_de_bh) { | |
1840 | status = -ENOENT; | |
1841 | mlog_errno(status); | |
1842 | goto leave; | |
1843 | } | |
1844 | ||
1845 | /* remove it from the orphan directory */ | |
1846 | status = ocfs2_delete_entry(handle, orphan_dir_inode, target_de, | |
1847 | target_de_bh); | |
1848 | if (status < 0) { | |
1849 | mlog_errno(status); | |
1850 | goto leave; | |
1851 | } | |
1852 | ||
1853 | status = ocfs2_journal_access(handle,orphan_dir_inode, orphan_dir_bh, | |
1854 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1855 | if (status < 0) { | |
1856 | mlog_errno(status); | |
1857 | goto leave; | |
1858 | } | |
1859 | ||
1860 | /* do the i_nlink dance! :) */ | |
1861 | orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; | |
1862 | if (S_ISDIR(inode->i_mode)) | |
1863 | le16_add_cpu(&orphan_fe->i_links_count, -1); | |
1864 | orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count); | |
1865 | ||
1866 | status = ocfs2_journal_dirty(handle, orphan_dir_bh); | |
1867 | if (status < 0) { | |
1868 | mlog_errno(status); | |
1869 | goto leave; | |
1870 | } | |
1871 | ||
1872 | leave: | |
a81cb88b | 1873 | brelse(target_de_bh); |
ccd979bd MF |
1874 | |
1875 | mlog_exit(status); | |
1876 | return status; | |
1877 | } | |
1878 | ||
92e1d5be | 1879 | const struct inode_operations ocfs2_dir_iops = { |
ccd979bd MF |
1880 | .create = ocfs2_create, |
1881 | .lookup = ocfs2_lookup, | |
1882 | .link = ocfs2_link, | |
1883 | .unlink = ocfs2_unlink, | |
1884 | .rmdir = ocfs2_unlink, | |
1885 | .symlink = ocfs2_symlink, | |
1886 | .mkdir = ocfs2_mkdir, | |
1887 | .mknod = ocfs2_mknod, | |
1888 | .rename = ocfs2_rename, | |
1889 | .setattr = ocfs2_setattr, | |
1890 | .getattr = ocfs2_getattr, | |
d38eb8db | 1891 | .permission = ocfs2_permission, |
cf1d6c76 TY |
1892 | .setxattr = generic_setxattr, |
1893 | .getxattr = generic_getxattr, | |
1894 | .listxattr = ocfs2_listxattr, | |
1895 | .removexattr = generic_removexattr, | |
ccd979bd | 1896 | }; |