Commit | Line | Data |
---|---|---|
1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * Copyright (C) International Business Machines Corp., 2000-2004 | |
4 | * Portions Copyright (C) Christoph Hellwig, 2001-2002 | |
1da177e4 LT |
5 | */ |
6 | ||
7 | #include <linux/fs.h> | |
2bc334dc | 8 | #include <linux/namei.h> |
1da177e4 LT |
9 | #include <linux/ctype.h> |
10 | #include <linux/quotaops.h> | |
d425de70 | 11 | #include <linux/exportfs.h> |
1da177e4 LT |
12 | #include "jfs_incore.h" |
13 | #include "jfs_superblock.h" | |
14 | #include "jfs_inode.h" | |
15 | #include "jfs_dinode.h" | |
16 | #include "jfs_dmap.h" | |
17 | #include "jfs_unicode.h" | |
18 | #include "jfs_metapage.h" | |
19 | #include "jfs_xattr.h" | |
20 | #include "jfs_acl.h" | |
21 | #include "jfs_debug.h" | |
22 | ||
1da177e4 LT |
23 | /* |
24 | * forward references | |
25 | */ | |
ad28b4ef | 26 | const struct dentry_operations jfs_ci_dentry_operations; |
1da177e4 LT |
27 | |
28 | static s64 commitZeroLink(tid_t, struct inode *); | |
29 | ||
4f4b401b DK |
30 | /* |
31 | * NAME: free_ea_wmap(inode) | |
32 | * | |
63f83c9f | 33 | * FUNCTION: free uncommitted extended attributes from working map |
4f4b401b DK |
34 | * |
35 | */ | |
36 | static inline void free_ea_wmap(struct inode *inode) | |
37 | { | |
38 | dxd_t *ea = &JFS_IP(inode)->ea; | |
39 | ||
40 | if (ea->flag & DXD_EXTENT) { | |
41 | /* free EA pages from cache */ | |
42 | invalidate_dxd_metapages(inode, *ea); | |
43 | dbFree(inode, addressDXD(ea), lengthDXD(ea)); | |
44 | } | |
45 | ea->flag = 0; | |
46 | } | |
47 | ||
1da177e4 LT |
48 | /* |
49 | * NAME: jfs_create(dip, dentry, mode) | |
50 | * | |
51 | * FUNCTION: create a regular file in the parent directory <dip> | |
52 | * with name = <from dentry> and mode = <mode> | |
53 | * | |
63f83c9f | 54 | * PARAMETER: dip - parent directory vnode |
1da177e4 LT |
55 | * dentry - dentry of new file |
56 | * mode - create mode (rwxrwxrwx). | |
57 | * nd- nd struct | |
58 | * | |
59 | * RETURN: Errors from subroutines | |
60 | * | |
61 | */ | |
4acdaf27 | 62 | static int jfs_create(struct inode *dip, struct dentry *dentry, umode_t mode, |
ebfc3b49 | 63 | bool excl) |
1da177e4 LT |
64 | { |
65 | int rc = 0; | |
66 | tid_t tid; /* transaction id */ | |
67 | struct inode *ip = NULL; /* child directory inode */ | |
68 | ino_t ino; | |
69 | struct component_name dname; /* child directory name */ | |
70 | struct btstack btstack; | |
71 | struct inode *iplist[2]; | |
72 | struct tblock *tblk; | |
73 | ||
a455589f | 74 | jfs_info("jfs_create: dip:0x%p name:%pd", dip, dentry); |
1da177e4 | 75 | |
acc84b05 DK |
76 | rc = dquot_initialize(dip); |
77 | if (rc) | |
78 | goto out1; | |
907f4554 | 79 | |
1da177e4 LT |
80 | /* |
81 | * search parent directory for entry/freespace | |
82 | * (dtSearch() returns parent directory page pinned) | |
83 | */ | |
84 | if ((rc = get_UCSname(&dname, dentry))) | |
85 | goto out1; | |
86 | ||
87 | /* | |
88 | * Either iAlloc() or txBegin() may block. Deadlock can occur if we | |
89 | * block there while holding dtree page, so we allocate the inode & | |
90 | * begin the transaction before we search the directory. | |
91 | */ | |
92 | ip = ialloc(dip, mode); | |
087387f9 AM |
93 | if (IS_ERR(ip)) { |
94 | rc = PTR_ERR(ip); | |
1da177e4 LT |
95 | goto out2; |
96 | } | |
97 | ||
98 | tid = txBegin(dip->i_sb, 0); | |
99 | ||
82d5b9a7 DK |
100 | mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); |
101 | mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); | |
1da177e4 | 102 | |
4f4b401b DK |
103 | rc = jfs_init_acl(tid, ip, dip); |
104 | if (rc) | |
105 | goto out3; | |
106 | ||
2a7dba39 | 107 | rc = jfs_init_security(tid, ip, dip, &dentry->d_name); |
1d15b10f DK |
108 | if (rc) { |
109 | txAbort(tid, 0); | |
110 | goto out3; | |
111 | } | |
112 | ||
1da177e4 LT |
113 | if ((rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE))) { |
114 | jfs_err("jfs_create: dtSearch returned %d", rc); | |
4f4b401b | 115 | txAbort(tid, 0); |
1da177e4 LT |
116 | goto out3; |
117 | } | |
118 | ||
119 | tblk = tid_to_tblock(tid); | |
120 | tblk->xflag |= COMMIT_CREATE; | |
121 | tblk->ino = ip->i_ino; | |
122 | tblk->u.ixpxd = JFS_IP(ip)->ixpxd; | |
123 | ||
124 | iplist[0] = dip; | |
125 | iplist[1] = ip; | |
126 | ||
127 | /* | |
128 | * initialize the child XAD tree root in-line in inode | |
129 | */ | |
130 | xtInitRoot(tid, ip); | |
131 | ||
132 | /* | |
133 | * create entry in parent directory for child directory | |
134 | * (dtInsert() releases parent directory page) | |
135 | */ | |
136 | ino = ip->i_ino; | |
137 | if ((rc = dtInsert(tid, dip, &dname, &ino, &btstack))) { | |
138 | if (rc == -EIO) { | |
139 | jfs_err("jfs_create: dtInsert returned -EIO"); | |
140 | txAbort(tid, 1); /* Marks Filesystem dirty */ | |
141 | } else | |
142 | txAbort(tid, 0); /* Filesystem full */ | |
143 | goto out3; | |
144 | } | |
145 | ||
146 | ip->i_op = &jfs_file_inode_operations; | |
147 | ip->i_fop = &jfs_file_operations; | |
148 | ip->i_mapping->a_ops = &jfs_aops; | |
149 | ||
1da177e4 LT |
150 | mark_inode_dirty(ip); |
151 | ||
078cd827 | 152 | dip->i_ctime = dip->i_mtime = current_time(dip); |
1da177e4 LT |
153 | |
154 | mark_inode_dirty(dip); | |
155 | ||
156 | rc = txCommit(tid, 2, &iplist[0], 0); | |
157 | ||
158 | out3: | |
159 | txEnd(tid); | |
1de87444 | 160 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 161 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 | 162 | if (rc) { |
4f4b401b | 163 | free_ea_wmap(ip); |
6d6b77f1 | 164 | clear_nlink(ip); |
a6cbedfa | 165 | discard_new_inode(ip); |
1f3403fa | 166 | } else { |
1e2e547a | 167 | d_instantiate_new(dentry, ip); |
1f3403fa | 168 | } |
1da177e4 LT |
169 | |
170 | out2: | |
171 | free_UCSname(&dname); | |
172 | ||
1da177e4 LT |
173 | out1: |
174 | ||
175 | jfs_info("jfs_create: rc:%d", rc); | |
176 | return rc; | |
177 | } | |
178 | ||
179 | ||
180 | /* | |
181 | * NAME: jfs_mkdir(dip, dentry, mode) | |
182 | * | |
183 | * FUNCTION: create a child directory in the parent directory <dip> | |
184 | * with name = <from dentry> and mode = <mode> | |
185 | * | |
63f83c9f | 186 | * PARAMETER: dip - parent directory vnode |
1da177e4 LT |
187 | * dentry - dentry of child directory |
188 | * mode - create mode (rwxrwxrwx). | |
189 | * | |
190 | * RETURN: Errors from subroutines | |
191 | * | |
192 | * note: | |
a83722f4 | 193 | * EACCES: user needs search+write permission on the parent directory |
1da177e4 | 194 | */ |
18bb1db3 | 195 | static int jfs_mkdir(struct inode *dip, struct dentry *dentry, umode_t mode) |
1da177e4 LT |
196 | { |
197 | int rc = 0; | |
198 | tid_t tid; /* transaction id */ | |
199 | struct inode *ip = NULL; /* child directory inode */ | |
200 | ino_t ino; | |
201 | struct component_name dname; /* child directory name */ | |
202 | struct btstack btstack; | |
203 | struct inode *iplist[2]; | |
204 | struct tblock *tblk; | |
205 | ||
a455589f | 206 | jfs_info("jfs_mkdir: dip:0x%p name:%pd", dip, dentry); |
1da177e4 | 207 | |
acc84b05 DK |
208 | rc = dquot_initialize(dip); |
209 | if (rc) | |
210 | goto out1; | |
907f4554 | 211 | |
1da177e4 LT |
212 | /* |
213 | * search parent directory for entry/freespace | |
214 | * (dtSearch() returns parent directory page pinned) | |
215 | */ | |
216 | if ((rc = get_UCSname(&dname, dentry))) | |
217 | goto out1; | |
218 | ||
219 | /* | |
220 | * Either iAlloc() or txBegin() may block. Deadlock can occur if we | |
221 | * block there while holding dtree page, so we allocate the inode & | |
222 | * begin the transaction before we search the directory. | |
223 | */ | |
224 | ip = ialloc(dip, S_IFDIR | mode); | |
087387f9 AM |
225 | if (IS_ERR(ip)) { |
226 | rc = PTR_ERR(ip); | |
1da177e4 LT |
227 | goto out2; |
228 | } | |
229 | ||
230 | tid = txBegin(dip->i_sb, 0); | |
231 | ||
82d5b9a7 DK |
232 | mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); |
233 | mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); | |
1da177e4 | 234 | |
4f4b401b DK |
235 | rc = jfs_init_acl(tid, ip, dip); |
236 | if (rc) | |
237 | goto out3; | |
238 | ||
2a7dba39 | 239 | rc = jfs_init_security(tid, ip, dip, &dentry->d_name); |
1d15b10f DK |
240 | if (rc) { |
241 | txAbort(tid, 0); | |
242 | goto out3; | |
243 | } | |
244 | ||
1da177e4 LT |
245 | if ((rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE))) { |
246 | jfs_err("jfs_mkdir: dtSearch returned %d", rc); | |
4f4b401b | 247 | txAbort(tid, 0); |
1da177e4 LT |
248 | goto out3; |
249 | } | |
250 | ||
251 | tblk = tid_to_tblock(tid); | |
252 | tblk->xflag |= COMMIT_CREATE; | |
253 | tblk->ino = ip->i_ino; | |
254 | tblk->u.ixpxd = JFS_IP(ip)->ixpxd; | |
255 | ||
256 | iplist[0] = dip; | |
257 | iplist[1] = ip; | |
258 | ||
259 | /* | |
260 | * initialize the child directory in-line in inode | |
261 | */ | |
262 | dtInitRoot(tid, ip, dip->i_ino); | |
263 | ||
264 | /* | |
265 | * create entry in parent directory for child directory | |
266 | * (dtInsert() releases parent directory page) | |
267 | */ | |
268 | ino = ip->i_ino; | |
269 | if ((rc = dtInsert(tid, dip, &dname, &ino, &btstack))) { | |
270 | if (rc == -EIO) { | |
271 | jfs_err("jfs_mkdir: dtInsert returned -EIO"); | |
272 | txAbort(tid, 1); /* Marks Filesystem dirty */ | |
273 | } else | |
274 | txAbort(tid, 0); /* Filesystem full */ | |
275 | goto out3; | |
276 | } | |
277 | ||
bfe86848 | 278 | set_nlink(ip, 2); /* for '.' */ |
1da177e4 LT |
279 | ip->i_op = &jfs_dir_inode_operations; |
280 | ip->i_fop = &jfs_dir_operations; | |
281 | ||
1da177e4 LT |
282 | mark_inode_dirty(ip); |
283 | ||
284 | /* update parent directory inode */ | |
d8c76e6f | 285 | inc_nlink(dip); /* for '..' from child directory */ |
078cd827 | 286 | dip->i_ctime = dip->i_mtime = current_time(dip); |
1da177e4 LT |
287 | mark_inode_dirty(dip); |
288 | ||
289 | rc = txCommit(tid, 2, &iplist[0], 0); | |
290 | ||
291 | out3: | |
292 | txEnd(tid); | |
1de87444 | 293 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 294 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 | 295 | if (rc) { |
4f4b401b | 296 | free_ea_wmap(ip); |
6d6b77f1 | 297 | clear_nlink(ip); |
a6cbedfa | 298 | discard_new_inode(ip); |
1f3403fa | 299 | } else { |
1e2e547a | 300 | d_instantiate_new(dentry, ip); |
1f3403fa | 301 | } |
1da177e4 LT |
302 | |
303 | out2: | |
304 | free_UCSname(&dname); | |
305 | ||
1da177e4 LT |
306 | |
307 | out1: | |
308 | ||
309 | jfs_info("jfs_mkdir: rc:%d", rc); | |
310 | return rc; | |
311 | } | |
312 | ||
313 | /* | |
314 | * NAME: jfs_rmdir(dip, dentry) | |
315 | * | |
316 | * FUNCTION: remove a link to child directory | |
317 | * | |
63f83c9f | 318 | * PARAMETER: dip - parent inode |
1da177e4 LT |
319 | * dentry - child directory dentry |
320 | * | |
321 | * RETURN: -EINVAL - if name is . or .. | |
f720e3ba | 322 | * -EINVAL - if . or .. exist but are invalid. |
1da177e4 LT |
323 | * errors from subroutines |
324 | * | |
325 | * note: | |
63f83c9f DK |
326 | * if other threads have the directory open when the last link |
327 | * is removed, the "." and ".." entries, if present, are removed before | |
328 | * rmdir() returns and no new entries may be created in the directory, | |
329 | * but the directory is not removed until the last reference to | |
1da177e4 LT |
330 | * the directory is released (cf.unlink() of regular file). |
331 | */ | |
332 | static int jfs_rmdir(struct inode *dip, struct dentry *dentry) | |
333 | { | |
334 | int rc; | |
335 | tid_t tid; /* transaction id */ | |
2b0143b5 | 336 | struct inode *ip = d_inode(dentry); |
1da177e4 LT |
337 | ino_t ino; |
338 | struct component_name dname; | |
339 | struct inode *iplist[2]; | |
340 | struct tblock *tblk; | |
341 | ||
a455589f | 342 | jfs_info("jfs_rmdir: dip:0x%p name:%pd", dip, dentry); |
1da177e4 LT |
343 | |
344 | /* Init inode for quota operations. */ | |
acc84b05 DK |
345 | rc = dquot_initialize(dip); |
346 | if (rc) | |
347 | goto out; | |
348 | rc = dquot_initialize(ip); | |
349 | if (rc) | |
350 | goto out; | |
1da177e4 LT |
351 | |
352 | /* directory must be empty to be removed */ | |
353 | if (!dtEmpty(ip)) { | |
354 | rc = -ENOTEMPTY; | |
355 | goto out; | |
356 | } | |
357 | ||
358 | if ((rc = get_UCSname(&dname, dentry))) { | |
359 | goto out; | |
360 | } | |
361 | ||
362 | tid = txBegin(dip->i_sb, 0); | |
363 | ||
82d5b9a7 DK |
364 | mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); |
365 | mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); | |
1da177e4 LT |
366 | |
367 | iplist[0] = dip; | |
368 | iplist[1] = ip; | |
369 | ||
370 | tblk = tid_to_tblock(tid); | |
371 | tblk->xflag |= COMMIT_DELETE; | |
372 | tblk->u.ip = ip; | |
373 | ||
374 | /* | |
375 | * delete the entry of target directory from parent directory | |
376 | */ | |
377 | ino = ip->i_ino; | |
378 | if ((rc = dtDelete(tid, dip, &dname, &ino, JFS_REMOVE))) { | |
379 | jfs_err("jfs_rmdir: dtDelete returned %d", rc); | |
380 | if (rc == -EIO) | |
381 | txAbort(tid, 1); | |
382 | txEnd(tid); | |
1de87444 | 383 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 384 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 LT |
385 | |
386 | goto out2; | |
387 | } | |
388 | ||
389 | /* update parent directory's link count corresponding | |
390 | * to ".." entry of the target directory deleted | |
391 | */ | |
078cd827 | 392 | dip->i_ctime = dip->i_mtime = current_time(dip); |
9a53c3a7 | 393 | inode_dec_link_count(dip); |
1da177e4 LT |
394 | |
395 | /* | |
396 | * OS/2 could have created EA and/or ACL | |
397 | */ | |
398 | /* free EA from both persistent and working map */ | |
399 | if (JFS_IP(ip)->ea.flag & DXD_EXTENT) { | |
400 | /* free EA pages */ | |
401 | txEA(tid, ip, &JFS_IP(ip)->ea, NULL); | |
402 | } | |
403 | JFS_IP(ip)->ea.flag = 0; | |
404 | ||
405 | /* free ACL from both persistent and working map */ | |
406 | if (JFS_IP(ip)->acl.flag & DXD_EXTENT) { | |
407 | /* free ACL pages */ | |
408 | txEA(tid, ip, &JFS_IP(ip)->acl, NULL); | |
409 | } | |
410 | JFS_IP(ip)->acl.flag = 0; | |
411 | ||
412 | /* mark the target directory as deleted */ | |
ce71ec36 | 413 | clear_nlink(ip); |
1da177e4 LT |
414 | mark_inode_dirty(ip); |
415 | ||
416 | rc = txCommit(tid, 2, &iplist[0], 0); | |
417 | ||
418 | txEnd(tid); | |
419 | ||
1de87444 | 420 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 421 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 LT |
422 | |
423 | /* | |
424 | * Truncating the directory index table is not guaranteed. It | |
425 | * may need to be done iteratively | |
426 | */ | |
427 | if (test_cflag(COMMIT_Stale, dip)) { | |
428 | if (dip->i_size > 1) | |
429 | jfs_truncate_nolock(dip, 0); | |
430 | ||
431 | clear_cflag(COMMIT_Stale, dip); | |
432 | } | |
433 | ||
434 | out2: | |
435 | free_UCSname(&dname); | |
436 | ||
437 | out: | |
438 | jfs_info("jfs_rmdir: rc:%d", rc); | |
439 | return rc; | |
440 | } | |
441 | ||
442 | /* | |
443 | * NAME: jfs_unlink(dip, dentry) | |
444 | * | |
63f83c9f | 445 | * FUNCTION: remove a link to object <vp> named by <name> |
1da177e4 LT |
446 | * from parent directory <dvp> |
447 | * | |
63f83c9f DK |
448 | * PARAMETER: dip - inode of parent directory |
449 | * dentry - dentry of object to be removed | |
1da177e4 LT |
450 | * |
451 | * RETURN: errors from subroutines | |
452 | * | |
453 | * note: | |
454 | * temporary file: if one or more processes have the file open | |
455 | * when the last link is removed, the link will be removed before | |
456 | * unlink() returns, but the removal of the file contents will be | |
457 | * postponed until all references to the files are closed. | |
458 | * | |
459 | * JFS does NOT support unlink() on directories. | |
460 | * | |
461 | */ | |
462 | static int jfs_unlink(struct inode *dip, struct dentry *dentry) | |
463 | { | |
464 | int rc; | |
465 | tid_t tid; /* transaction id */ | |
2b0143b5 | 466 | struct inode *ip = d_inode(dentry); |
1da177e4 LT |
467 | ino_t ino; |
468 | struct component_name dname; /* object name */ | |
469 | struct inode *iplist[2]; | |
470 | struct tblock *tblk; | |
471 | s64 new_size = 0; | |
472 | int commit_flag; | |
473 | ||
a455589f | 474 | jfs_info("jfs_unlink: dip:0x%p name:%pd", dip, dentry); |
1da177e4 LT |
475 | |
476 | /* Init inode for quota operations. */ | |
acc84b05 DK |
477 | rc = dquot_initialize(dip); |
478 | if (rc) | |
479 | goto out; | |
480 | rc = dquot_initialize(ip); | |
481 | if (rc) | |
482 | goto out; | |
1da177e4 LT |
483 | |
484 | if ((rc = get_UCSname(&dname, dentry))) | |
485 | goto out; | |
486 | ||
82d5b9a7 | 487 | IWRITE_LOCK(ip, RDWRLOCK_NORMAL); |
1da177e4 LT |
488 | |
489 | tid = txBegin(dip->i_sb, 0); | |
490 | ||
82d5b9a7 DK |
491 | mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); |
492 | mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); | |
1da177e4 LT |
493 | |
494 | iplist[0] = dip; | |
495 | iplist[1] = ip; | |
496 | ||
497 | /* | |
498 | * delete the entry of target file from parent directory | |
499 | */ | |
500 | ino = ip->i_ino; | |
501 | if ((rc = dtDelete(tid, dip, &dname, &ino, JFS_REMOVE))) { | |
502 | jfs_err("jfs_unlink: dtDelete returned %d", rc); | |
503 | if (rc == -EIO) | |
504 | txAbort(tid, 1); /* Marks FS Dirty */ | |
505 | txEnd(tid); | |
1de87444 | 506 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 507 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 LT |
508 | IWRITE_UNLOCK(ip); |
509 | goto out1; | |
510 | } | |
511 | ||
512 | ASSERT(ip->i_nlink); | |
513 | ||
078cd827 | 514 | ip->i_ctime = dip->i_ctime = dip->i_mtime = current_time(ip); |
1da177e4 LT |
515 | mark_inode_dirty(dip); |
516 | ||
517 | /* update target's inode */ | |
9a53c3a7 | 518 | inode_dec_link_count(ip); |
1da177e4 LT |
519 | |
520 | /* | |
f720e3ba | 521 | * commit zero link count object |
1da177e4 LT |
522 | */ |
523 | if (ip->i_nlink == 0) { | |
524 | assert(!test_cflag(COMMIT_Nolink, ip)); | |
525 | /* free block resources */ | |
526 | if ((new_size = commitZeroLink(tid, ip)) < 0) { | |
527 | txAbort(tid, 1); /* Marks FS Dirty */ | |
528 | txEnd(tid); | |
1de87444 | 529 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 530 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 LT |
531 | IWRITE_UNLOCK(ip); |
532 | rc = new_size; | |
533 | goto out1; | |
534 | } | |
535 | tblk = tid_to_tblock(tid); | |
536 | tblk->xflag |= COMMIT_DELETE; | |
537 | tblk->u.ip = ip; | |
538 | } | |
539 | ||
540 | /* | |
541 | * Incomplete truncate of file data can | |
542 | * result in timing problems unless we synchronously commit the | |
543 | * transaction. | |
544 | */ | |
545 | if (new_size) | |
546 | commit_flag = COMMIT_SYNC; | |
547 | else | |
548 | commit_flag = 0; | |
549 | ||
550 | /* | |
551 | * If xtTruncate was incomplete, commit synchronously to avoid | |
552 | * timing complications | |
553 | */ | |
554 | rc = txCommit(tid, 2, &iplist[0], commit_flag); | |
555 | ||
556 | txEnd(tid); | |
557 | ||
1de87444 | 558 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 559 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 LT |
560 | |
561 | while (new_size && (rc == 0)) { | |
562 | tid = txBegin(dip->i_sb, 0); | |
1de87444 | 563 | mutex_lock(&JFS_IP(ip)->commit_mutex); |
1da177e4 LT |
564 | new_size = xtTruncate_pmap(tid, ip, new_size); |
565 | if (new_size < 0) { | |
566 | txAbort(tid, 1); /* Marks FS Dirty */ | |
567 | rc = new_size; | |
568 | } else | |
569 | rc = txCommit(tid, 2, &iplist[0], COMMIT_SYNC); | |
570 | txEnd(tid); | |
1de87444 | 571 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
1da177e4 LT |
572 | } |
573 | ||
574 | if (ip->i_nlink == 0) | |
575 | set_cflag(COMMIT_Nolink, ip); | |
576 | ||
577 | IWRITE_UNLOCK(ip); | |
578 | ||
579 | /* | |
580 | * Truncating the directory index table is not guaranteed. It | |
581 | * may need to be done iteratively | |
582 | */ | |
583 | if (test_cflag(COMMIT_Stale, dip)) { | |
584 | if (dip->i_size > 1) | |
585 | jfs_truncate_nolock(dip, 0); | |
586 | ||
587 | clear_cflag(COMMIT_Stale, dip); | |
588 | } | |
589 | ||
590 | out1: | |
591 | free_UCSname(&dname); | |
592 | out: | |
593 | jfs_info("jfs_unlink: rc:%d", rc); | |
594 | return rc; | |
595 | } | |
596 | ||
597 | /* | |
598 | * NAME: commitZeroLink() | |
599 | * | |
f720e3ba | 600 | * FUNCTION: for non-directory, called by jfs_remove(), |
1da177e4 | 601 | * truncate a regular file, directory or symbolic |
63f83c9f | 602 | * link to zero length. return 0 if type is not |
1da177e4 LT |
603 | * one of these. |
604 | * | |
605 | * if the file is currently associated with a VM segment | |
606 | * only permanent disk and inode map resources are freed, | |
607 | * and neither the inode nor indirect blocks are modified | |
608 | * so that the resources can be later freed in the work | |
609 | * map by ctrunc1. | |
610 | * if there is no VM segment on entry, the resources are | |
611 | * freed in both work and permanent map. | |
63f83c9f | 612 | * (? for temporary file - memory object is cached even |
1da177e4 LT |
613 | * after no reference: |
614 | * reference count > 0 - ) | |
615 | * | |
616 | * PARAMETERS: cd - pointer to commit data structure. | |
617 | * current inode is the one to truncate. | |
618 | * | |
619 | * RETURN: Errors from subroutines | |
620 | */ | |
621 | static s64 commitZeroLink(tid_t tid, struct inode *ip) | |
622 | { | |
623 | int filetype; | |
624 | struct tblock *tblk; | |
625 | ||
626 | jfs_info("commitZeroLink: tid = %d, ip = 0x%p", tid, ip); | |
627 | ||
628 | filetype = ip->i_mode & S_IFMT; | |
629 | switch (filetype) { | |
630 | case S_IFREG: | |
631 | break; | |
632 | case S_IFLNK: | |
633 | /* fast symbolic link */ | |
634 | if (ip->i_size < IDATASIZE) { | |
635 | ip->i_size = 0; | |
636 | return 0; | |
637 | } | |
638 | break; | |
639 | default: | |
640 | assert(filetype != S_IFDIR); | |
641 | return 0; | |
642 | } | |
643 | ||
644 | set_cflag(COMMIT_Freewmap, ip); | |
645 | ||
646 | /* mark transaction of block map update type */ | |
647 | tblk = tid_to_tblock(tid); | |
648 | tblk->xflag |= COMMIT_PMAP; | |
649 | ||
650 | /* | |
651 | * free EA | |
652 | */ | |
653 | if (JFS_IP(ip)->ea.flag & DXD_EXTENT) | |
654 | /* acquire maplock on EA to be freed from block map */ | |
655 | txEA(tid, ip, &JFS_IP(ip)->ea, NULL); | |
656 | ||
657 | /* | |
658 | * free ACL | |
659 | */ | |
660 | if (JFS_IP(ip)->acl.flag & DXD_EXTENT) | |
661 | /* acquire maplock on EA to be freed from block map */ | |
662 | txEA(tid, ip, &JFS_IP(ip)->acl, NULL); | |
663 | ||
664 | /* | |
665 | * free xtree/data (truncate to zero length): | |
63f83c9f | 666 | * free xtree/data pages from cache if COMMIT_PWMAP, |
1da177e4 LT |
667 | * free xtree/data blocks from persistent block map, and |
668 | * free xtree/data blocks from working block map if COMMIT_PWMAP; | |
669 | */ | |
670 | if (ip->i_size) | |
671 | return xtTruncate_pmap(tid, ip, 0); | |
672 | ||
673 | return 0; | |
674 | } | |
675 | ||
676 | ||
677 | /* | |
1868f4aa | 678 | * NAME: jfs_free_zero_link() |
1da177e4 | 679 | * |
f720e3ba | 680 | * FUNCTION: for non-directory, called by iClose(), |
63f83c9f | 681 | * free resources of a file from cache and WORKING map |
1da177e4 LT |
682 | * for a file previously committed with zero link count |
683 | * while associated with a pager object, | |
684 | * | |
685 | * PARAMETER: ip - pointer to inode of file. | |
1da177e4 | 686 | */ |
1868f4aa | 687 | void jfs_free_zero_link(struct inode *ip) |
1da177e4 | 688 | { |
1da177e4 LT |
689 | int type; |
690 | ||
1868f4aa | 691 | jfs_info("jfs_free_zero_link: ip = 0x%p", ip); |
1da177e4 LT |
692 | |
693 | /* return if not reg or symbolic link or if size is | |
694 | * already ok. | |
695 | */ | |
696 | type = ip->i_mode & S_IFMT; | |
697 | ||
698 | switch (type) { | |
699 | case S_IFREG: | |
700 | break; | |
701 | case S_IFLNK: | |
702 | /* if its contained in inode nothing to do */ | |
703 | if (ip->i_size < IDATASIZE) | |
1868f4aa | 704 | return; |
1da177e4 LT |
705 | break; |
706 | default: | |
1868f4aa | 707 | return; |
1da177e4 LT |
708 | } |
709 | ||
710 | /* | |
711 | * free EA | |
712 | */ | |
713 | if (JFS_IP(ip)->ea.flag & DXD_EXTENT) { | |
714 | s64 xaddr = addressDXD(&JFS_IP(ip)->ea); | |
715 | int xlen = lengthDXD(&JFS_IP(ip)->ea); | |
716 | struct maplock maplock; /* maplock for COMMIT_WMAP */ | |
717 | struct pxd_lock *pxdlock; /* maplock for COMMIT_WMAP */ | |
718 | ||
719 | /* free EA pages from cache */ | |
720 | invalidate_dxd_metapages(ip, JFS_IP(ip)->ea); | |
721 | ||
722 | /* free EA extent from working block map */ | |
723 | maplock.index = 1; | |
724 | pxdlock = (struct pxd_lock *) & maplock; | |
725 | pxdlock->flag = mlckFREEPXD; | |
726 | PXDaddress(&pxdlock->pxd, xaddr); | |
727 | PXDlength(&pxdlock->pxd, xlen); | |
728 | txFreeMap(ip, pxdlock, NULL, COMMIT_WMAP); | |
729 | } | |
730 | ||
731 | /* | |
732 | * free ACL | |
733 | */ | |
734 | if (JFS_IP(ip)->acl.flag & DXD_EXTENT) { | |
735 | s64 xaddr = addressDXD(&JFS_IP(ip)->acl); | |
736 | int xlen = lengthDXD(&JFS_IP(ip)->acl); | |
737 | struct maplock maplock; /* maplock for COMMIT_WMAP */ | |
738 | struct pxd_lock *pxdlock; /* maplock for COMMIT_WMAP */ | |
739 | ||
740 | invalidate_dxd_metapages(ip, JFS_IP(ip)->acl); | |
741 | ||
742 | /* free ACL extent from working block map */ | |
743 | maplock.index = 1; | |
744 | pxdlock = (struct pxd_lock *) & maplock; | |
745 | pxdlock->flag = mlckFREEPXD; | |
746 | PXDaddress(&pxdlock->pxd, xaddr); | |
747 | PXDlength(&pxdlock->pxd, xlen); | |
748 | txFreeMap(ip, pxdlock, NULL, COMMIT_WMAP); | |
749 | } | |
750 | ||
751 | /* | |
752 | * free xtree/data (truncate to zero length): | |
753 | * free xtree/data pages from cache, and | |
754 | * free xtree/data blocks from working block map; | |
755 | */ | |
756 | if (ip->i_size) | |
1868f4aa | 757 | xtTruncate(0, ip, 0, COMMIT_WMAP); |
1da177e4 LT |
758 | } |
759 | ||
760 | /* | |
761 | * NAME: jfs_link(vp, dvp, name, crp) | |
762 | * | |
763 | * FUNCTION: create a link to <vp> by the name = <name> | |
764 | * in the parent directory <dvp> | |
765 | * | |
63f83c9f | 766 | * PARAMETER: vp - target object |
1da177e4 LT |
767 | * dvp - parent directory of new link |
768 | * name - name of new link to target object | |
769 | * crp - credential | |
770 | * | |
771 | * RETURN: Errors from subroutines | |
772 | * | |
773 | * note: | |
774 | * JFS does NOT support link() on directories (to prevent circular | |
775 | * path in the directory hierarchy); | |
776 | * EPERM: the target object is a directory, and either the caller | |
777 | * does not have appropriate privileges or the implementation prohibits | |
778 | * using link() on directories [XPG4.2]. | |
779 | * | |
780 | * JFS does NOT support links between file systems: | |
781 | * EXDEV: target object and new link are on different file systems and | |
782 | * implementation does not support links between file systems [XPG4.2]. | |
783 | */ | |
784 | static int jfs_link(struct dentry *old_dentry, | |
785 | struct inode *dir, struct dentry *dentry) | |
786 | { | |
787 | int rc; | |
788 | tid_t tid; | |
2b0143b5 | 789 | struct inode *ip = d_inode(old_dentry); |
1da177e4 LT |
790 | ino_t ino; |
791 | struct component_name dname; | |
792 | struct btstack btstack; | |
793 | struct inode *iplist[2]; | |
794 | ||
a455589f | 795 | jfs_info("jfs_link: %pd %pd", old_dentry, dentry); |
1da177e4 | 796 | |
acc84b05 DK |
797 | rc = dquot_initialize(dir); |
798 | if (rc) | |
799 | goto out; | |
907f4554 | 800 | |
1da177e4 LT |
801 | tid = txBegin(ip->i_sb, 0); |
802 | ||
82d5b9a7 DK |
803 | mutex_lock_nested(&JFS_IP(dir)->commit_mutex, COMMIT_MUTEX_PARENT); |
804 | mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); | |
1da177e4 LT |
805 | |
806 | /* | |
807 | * scan parent directory for entry/freespace | |
808 | */ | |
809 | if ((rc = get_UCSname(&dname, dentry))) | |
acc84b05 | 810 | goto out_tx; |
1da177e4 LT |
811 | |
812 | if ((rc = dtSearch(dir, &dname, &ino, &btstack, JFS_CREATE))) | |
813 | goto free_dname; | |
814 | ||
815 | /* | |
816 | * create entry for new link in parent directory | |
817 | */ | |
818 | ino = ip->i_ino; | |
819 | if ((rc = dtInsert(tid, dir, &dname, &ino, &btstack))) | |
820 | goto free_dname; | |
821 | ||
822 | /* update object inode */ | |
d8c76e6f | 823 | inc_nlink(ip); /* for new link */ |
078cd827 DD |
824 | ip->i_ctime = current_time(ip); |
825 | dir->i_ctime = dir->i_mtime = current_time(dir); | |
1da177e4 | 826 | mark_inode_dirty(dir); |
7de9c6ee | 827 | ihold(ip); |
1da177e4 LT |
828 | |
829 | iplist[0] = ip; | |
830 | iplist[1] = dir; | |
831 | rc = txCommit(tid, 2, &iplist[0], 0); | |
832 | ||
833 | if (rc) { | |
6d6b77f1 | 834 | drop_nlink(ip); /* never instantiated */ |
1da177e4 LT |
835 | iput(ip); |
836 | } else | |
837 | d_instantiate(dentry, ip); | |
838 | ||
839 | free_dname: | |
840 | free_UCSname(&dname); | |
841 | ||
acc84b05 | 842 | out_tx: |
1da177e4 LT |
843 | txEnd(tid); |
844 | ||
1de87444 | 845 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 846 | mutex_unlock(&JFS_IP(dir)->commit_mutex); |
1da177e4 | 847 | |
acc84b05 | 848 | out: |
1da177e4 LT |
849 | jfs_info("jfs_link: rc:%d", rc); |
850 | return rc; | |
851 | } | |
852 | ||
853 | /* | |
854 | * NAME: jfs_symlink(dip, dentry, name) | |
855 | * | |
856 | * FUNCTION: creates a symbolic link to <symlink> by name <name> | |
f720e3ba | 857 | * in directory <dip> |
1da177e4 | 858 | * |
f720e3ba DK |
859 | * PARAMETER: dip - parent directory vnode |
860 | * dentry - dentry of symbolic link | |
861 | * name - the path name of the existing object | |
862 | * that will be the source of the link | |
1da177e4 LT |
863 | * |
864 | * RETURN: errors from subroutines | |
865 | * | |
866 | * note: | |
867 | * ENAMETOOLONG: pathname resolution of a symbolic link produced | |
868 | * an intermediate result whose length exceeds PATH_MAX [XPG4.2] | |
869 | */ | |
870 | ||
871 | static int jfs_symlink(struct inode *dip, struct dentry *dentry, | |
872 | const char *name) | |
873 | { | |
874 | int rc; | |
875 | tid_t tid; | |
876 | ino_t ino = 0; | |
877 | struct component_name dname; | |
878 | int ssize; /* source pathname size */ | |
879 | struct btstack btstack; | |
2b0143b5 | 880 | struct inode *ip = d_inode(dentry); |
1da177e4 LT |
881 | s64 xlen = 0; |
882 | int bmask = 0, xsize; | |
3c2c2262 | 883 | s64 xaddr; |
1da177e4 LT |
884 | struct metapage *mp; |
885 | struct super_block *sb; | |
886 | struct tblock *tblk; | |
887 | ||
888 | struct inode *iplist[2]; | |
889 | ||
890 | jfs_info("jfs_symlink: dip:0x%p name:%s", dip, name); | |
891 | ||
acc84b05 DK |
892 | rc = dquot_initialize(dip); |
893 | if (rc) | |
894 | goto out1; | |
907f4554 | 895 | |
1da177e4 LT |
896 | ssize = strlen(name) + 1; |
897 | ||
898 | /* | |
899 | * search parent directory for entry/freespace | |
900 | * (dtSearch() returns parent directory page pinned) | |
901 | */ | |
902 | ||
903 | if ((rc = get_UCSname(&dname, dentry))) | |
904 | goto out1; | |
905 | ||
906 | /* | |
907 | * allocate on-disk/in-memory inode for symbolic link: | |
908 | * (iAlloc() returns new, locked inode) | |
909 | */ | |
910 | ip = ialloc(dip, S_IFLNK | 0777); | |
087387f9 AM |
911 | if (IS_ERR(ip)) { |
912 | rc = PTR_ERR(ip); | |
1da177e4 LT |
913 | goto out2; |
914 | } | |
915 | ||
916 | tid = txBegin(dip->i_sb, 0); | |
917 | ||
82d5b9a7 DK |
918 | mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); |
919 | mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); | |
1da177e4 | 920 | |
2a7dba39 | 921 | rc = jfs_init_security(tid, ip, dip, &dentry->d_name); |
1d15b10f DK |
922 | if (rc) |
923 | goto out3; | |
924 | ||
1da177e4 LT |
925 | tblk = tid_to_tblock(tid); |
926 | tblk->xflag |= COMMIT_CREATE; | |
927 | tblk->ino = ip->i_ino; | |
928 | tblk->u.ixpxd = JFS_IP(ip)->ixpxd; | |
929 | ||
930 | /* fix symlink access permission | |
63f83c9f | 931 | * (dir_create() ANDs in the u.u_cmask, |
1da177e4 LT |
932 | * but symlinks really need to be 777 access) |
933 | */ | |
934 | ip->i_mode |= 0777; | |
935 | ||
936 | /* | |
937 | * write symbolic link target path name | |
938 | */ | |
939 | xtInitRoot(tid, ip); | |
940 | ||
941 | /* | |
942 | * write source path name inline in on-disk inode (fast symbolic link) | |
943 | */ | |
944 | ||
945 | if (ssize <= IDATASIZE) { | |
c7f2e1f0 | 946 | ip->i_op = &jfs_fast_symlink_inode_operations; |
1da177e4 | 947 | |
ad476fed AV |
948 | ip->i_link = JFS_IP(ip)->i_inline; |
949 | memcpy(ip->i_link, name, ssize); | |
1da177e4 LT |
950 | ip->i_size = ssize - 1; |
951 | ||
952 | /* | |
953 | * if symlink is > 128 bytes, we don't have the space to | |
954 | * store inline extended attributes | |
955 | */ | |
956 | if (ssize > sizeof (JFS_IP(ip)->i_inline)) | |
957 | JFS_IP(ip)->mode2 &= ~INLINEEA; | |
958 | ||
959 | jfs_info("jfs_symlink: fast symlink added ssize:%d name:%s ", | |
960 | ssize, name); | |
961 | } | |
962 | /* | |
963 | * write source path name in a single extent | |
964 | */ | |
965 | else { | |
966 | jfs_info("jfs_symlink: allocate extent ip:0x%p", ip); | |
967 | ||
c7f2e1f0 | 968 | ip->i_op = &jfs_symlink_inode_operations; |
21fc61c7 | 969 | inode_nohighmem(ip); |
1da177e4 LT |
970 | ip->i_mapping->a_ops = &jfs_aops; |
971 | ||
972 | /* | |
63f83c9f | 973 | * even though the data of symlink object (source |
1da177e4 LT |
974 | * path name) is treated as non-journaled user data, |
975 | * it is read/written thru buffer cache for performance. | |
976 | */ | |
977 | sb = ip->i_sb; | |
978 | bmask = JFS_SBI(sb)->bsize - 1; | |
979 | xsize = (ssize + bmask) & ~bmask; | |
980 | xaddr = 0; | |
981 | xlen = xsize >> JFS_SBI(sb)->l2bsize; | |
982 | if ((rc = xtInsert(tid, ip, 0, 0, xlen, &xaddr, 0))) { | |
983 | txAbort(tid, 0); | |
1da177e4 LT |
984 | goto out3; |
985 | } | |
1da177e4 LT |
986 | ip->i_size = ssize - 1; |
987 | while (ssize) { | |
988 | /* This is kind of silly since PATH_MAX == 4K */ | |
989 | int copy_size = min(ssize, PSIZE); | |
990 | ||
991 | mp = get_metapage(ip, xaddr, PSIZE, 1); | |
992 | ||
993 | if (mp == NULL) { | |
994 | xtTruncate(tid, ip, 0, COMMIT_PWMAP); | |
995 | rc = -EIO; | |
996 | txAbort(tid, 0); | |
997 | goto out3; | |
998 | } | |
999 | memcpy(mp->data, name, copy_size); | |
1000 | flush_metapage(mp); | |
1001 | ssize -= copy_size; | |
1002 | name += copy_size; | |
1003 | xaddr += JFS_SBI(sb)->nbperpage; | |
1004 | } | |
1005 | } | |
1006 | ||
1007 | /* | |
1008 | * create entry for symbolic link in parent directory | |
1009 | */ | |
1010 | rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE); | |
1011 | if (rc == 0) { | |
1012 | ino = ip->i_ino; | |
1013 | rc = dtInsert(tid, dip, &dname, &ino, &btstack); | |
1014 | } | |
1015 | if (rc) { | |
1016 | if (xlen) | |
1017 | xtTruncate(tid, ip, 0, COMMIT_PWMAP); | |
1018 | txAbort(tid, 0); | |
1019 | /* discard new inode */ | |
1020 | goto out3; | |
1021 | } | |
1022 | ||
1da177e4 LT |
1023 | mark_inode_dirty(ip); |
1024 | ||
078cd827 | 1025 | dip->i_ctime = dip->i_mtime = current_time(dip); |
988a6490 | 1026 | mark_inode_dirty(dip); |
1da177e4 LT |
1027 | /* |
1028 | * commit update of parent directory and link object | |
1029 | */ | |
1030 | ||
1031 | iplist[0] = dip; | |
1032 | iplist[1] = ip; | |
1033 | rc = txCommit(tid, 2, &iplist[0], 0); | |
1034 | ||
1035 | out3: | |
1036 | txEnd(tid); | |
1de87444 | 1037 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 1038 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 | 1039 | if (rc) { |
4f4b401b | 1040 | free_ea_wmap(ip); |
6d6b77f1 | 1041 | clear_nlink(ip); |
a6cbedfa | 1042 | discard_new_inode(ip); |
1f3403fa | 1043 | } else { |
1e2e547a | 1044 | d_instantiate_new(dentry, ip); |
1f3403fa | 1045 | } |
1da177e4 LT |
1046 | |
1047 | out2: | |
1048 | free_UCSname(&dname); | |
1049 | ||
1da177e4 LT |
1050 | out1: |
1051 | jfs_info("jfs_symlink: rc:%d", rc); | |
1052 | return rc; | |
1053 | } | |
1054 | ||
1055 | ||
1056 | /* | |
f720e3ba | 1057 | * NAME: jfs_rename |
1da177e4 | 1058 | * |
f720e3ba | 1059 | * FUNCTION: rename a file or directory |
1da177e4 LT |
1060 | */ |
1061 | static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
f03b8ad8 MS |
1062 | struct inode *new_dir, struct dentry *new_dentry, |
1063 | unsigned int flags) | |
1da177e4 LT |
1064 | { |
1065 | struct btstack btstack; | |
1066 | ino_t ino; | |
1067 | struct component_name new_dname; | |
1068 | struct inode *new_ip; | |
1069 | struct component_name old_dname; | |
1070 | struct inode *old_ip; | |
1071 | int rc; | |
1072 | tid_t tid; | |
1073 | struct tlock *tlck; | |
1074 | struct dt_lock *dtlck; | |
1075 | struct lv *lv; | |
1076 | int ipcount; | |
1077 | struct inode *iplist[4]; | |
1078 | struct tblock *tblk; | |
1079 | s64 new_size = 0; | |
1080 | int commit_flag; | |
1081 | ||
f03b8ad8 MS |
1082 | if (flags & ~RENAME_NOREPLACE) |
1083 | return -EINVAL; | |
1da177e4 | 1084 | |
a455589f | 1085 | jfs_info("jfs_rename: %pd %pd", old_dentry, new_dentry); |
1da177e4 | 1086 | |
acc84b05 DK |
1087 | rc = dquot_initialize(old_dir); |
1088 | if (rc) | |
1089 | goto out1; | |
1090 | rc = dquot_initialize(new_dir); | |
1091 | if (rc) | |
1092 | goto out1; | |
907f4554 | 1093 | |
2b0143b5 DH |
1094 | old_ip = d_inode(old_dentry); |
1095 | new_ip = d_inode(new_dentry); | |
1da177e4 LT |
1096 | |
1097 | if ((rc = get_UCSname(&old_dname, old_dentry))) | |
1098 | goto out1; | |
1099 | ||
1100 | if ((rc = get_UCSname(&new_dname, new_dentry))) | |
1101 | goto out2; | |
1102 | ||
1103 | /* | |
1104 | * Make sure source inode number is what we think it is | |
1105 | */ | |
1106 | rc = dtSearch(old_dir, &old_dname, &ino, &btstack, JFS_LOOKUP); | |
1107 | if (rc || (ino != old_ip->i_ino)) { | |
1108 | rc = -ENOENT; | |
1109 | goto out3; | |
1110 | } | |
1111 | ||
1112 | /* | |
1113 | * Make sure dest inode number (if any) is what we think it is | |
1114 | */ | |
1115 | rc = dtSearch(new_dir, &new_dname, &ino, &btstack, JFS_LOOKUP); | |
09aaa749 | 1116 | if (!rc) { |
da8a41d1 | 1117 | if ((!new_ip) || (ino != new_ip->i_ino)) { |
1da177e4 LT |
1118 | rc = -ESTALE; |
1119 | goto out3; | |
1120 | } | |
1121 | } else if (rc != -ENOENT) | |
1122 | goto out3; | |
1123 | else if (new_ip) { | |
1124 | /* no entry exists, but one was expected */ | |
1125 | rc = -ESTALE; | |
1126 | goto out3; | |
1127 | } | |
1128 | ||
1129 | if (S_ISDIR(old_ip->i_mode)) { | |
1130 | if (new_ip) { | |
1131 | if (!dtEmpty(new_ip)) { | |
1132 | rc = -ENOTEMPTY; | |
1133 | goto out3; | |
1134 | } | |
1da177e4 LT |
1135 | } |
1136 | } else if (new_ip) { | |
82d5b9a7 | 1137 | IWRITE_LOCK(new_ip, RDWRLOCK_NORMAL); |
1da177e4 | 1138 | /* Init inode for quota operations. */ |
acc84b05 DK |
1139 | rc = dquot_initialize(new_ip); |
1140 | if (rc) | |
1141 | goto out_unlock; | |
1da177e4 LT |
1142 | } |
1143 | ||
1144 | /* | |
1145 | * The real work starts here | |
1146 | */ | |
1147 | tid = txBegin(new_dir->i_sb, 0); | |
1148 | ||
82d5b9a7 DK |
1149 | /* |
1150 | * How do we know the locking is safe from deadlocks? | |
1151 | * The vfs does the hard part for us. Any time we are taking nested | |
1152 | * commit_mutexes, the vfs already has i_mutex held on the parent. | |
1153 | * Here, the vfs has already taken i_mutex on both old_dir and new_dir. | |
1154 | */ | |
1155 | mutex_lock_nested(&JFS_IP(new_dir)->commit_mutex, COMMIT_MUTEX_PARENT); | |
1156 | mutex_lock_nested(&JFS_IP(old_ip)->commit_mutex, COMMIT_MUTEX_CHILD); | |
1da177e4 | 1157 | if (old_dir != new_dir) |
82d5b9a7 DK |
1158 | mutex_lock_nested(&JFS_IP(old_dir)->commit_mutex, |
1159 | COMMIT_MUTEX_SECOND_PARENT); | |
1da177e4 LT |
1160 | |
1161 | if (new_ip) { | |
82d5b9a7 DK |
1162 | mutex_lock_nested(&JFS_IP(new_ip)->commit_mutex, |
1163 | COMMIT_MUTEX_VICTIM); | |
1da177e4 LT |
1164 | /* |
1165 | * Change existing directory entry to new inode number | |
1166 | */ | |
1167 | ino = new_ip->i_ino; | |
1168 | rc = dtModify(tid, new_dir, &new_dname, &ino, | |
1169 | old_ip->i_ino, JFS_RENAME); | |
1170 | if (rc) | |
26456955 | 1171 | goto out_tx; |
9a53c3a7 | 1172 | drop_nlink(new_ip); |
1da177e4 | 1173 | if (S_ISDIR(new_ip->i_mode)) { |
9a53c3a7 | 1174 | drop_nlink(new_ip); |
1da177e4 | 1175 | if (new_ip->i_nlink) { |
48ce8b05 | 1176 | mutex_unlock(&JFS_IP(new_ip)->commit_mutex); |
1da177e4 | 1177 | if (old_dir != new_dir) |
1de87444 | 1178 | mutex_unlock(&JFS_IP(old_dir)->commit_mutex); |
48ce8b05 ED |
1179 | mutex_unlock(&JFS_IP(old_ip)->commit_mutex); |
1180 | mutex_unlock(&JFS_IP(new_dir)->commit_mutex); | |
1da177e4 LT |
1181 | if (!S_ISDIR(old_ip->i_mode) && new_ip) |
1182 | IWRITE_UNLOCK(new_ip); | |
1183 | jfs_error(new_ip->i_sb, | |
eb8630d7 | 1184 | "new_ip->i_nlink != 0\n"); |
1da177e4 LT |
1185 | return -EIO; |
1186 | } | |
1187 | tblk = tid_to_tblock(tid); | |
1188 | tblk->xflag |= COMMIT_DELETE; | |
1189 | tblk->u.ip = new_ip; | |
1190 | } else if (new_ip->i_nlink == 0) { | |
1191 | assert(!test_cflag(COMMIT_Nolink, new_ip)); | |
1192 | /* free block resources */ | |
1193 | if ((new_size = commitZeroLink(tid, new_ip)) < 0) { | |
1194 | txAbort(tid, 1); /* Marks FS Dirty */ | |
63f83c9f | 1195 | rc = new_size; |
26456955 | 1196 | goto out_tx; |
1da177e4 LT |
1197 | } |
1198 | tblk = tid_to_tblock(tid); | |
1199 | tblk->xflag |= COMMIT_DELETE; | |
1200 | tblk->u.ip = new_ip; | |
1201 | } else { | |
078cd827 | 1202 | new_ip->i_ctime = current_time(new_ip); |
1da177e4 LT |
1203 | mark_inode_dirty(new_ip); |
1204 | } | |
1205 | } else { | |
1206 | /* | |
1207 | * Add new directory entry | |
1208 | */ | |
1209 | rc = dtSearch(new_dir, &new_dname, &ino, &btstack, | |
1210 | JFS_CREATE); | |
1211 | if (rc) { | |
6ed71e98 JP |
1212 | jfs_err("jfs_rename didn't expect dtSearch to fail w/rc = %d", |
1213 | rc); | |
26456955 | 1214 | goto out_tx; |
1da177e4 LT |
1215 | } |
1216 | ||
1217 | ino = old_ip->i_ino; | |
1218 | rc = dtInsert(tid, new_dir, &new_dname, &ino, &btstack); | |
1219 | if (rc) { | |
1220 | if (rc == -EIO) | |
1221 | jfs_err("jfs_rename: dtInsert returned -EIO"); | |
26456955 | 1222 | goto out_tx; |
1da177e4 LT |
1223 | } |
1224 | if (S_ISDIR(old_ip->i_mode)) | |
d8c76e6f | 1225 | inc_nlink(new_dir); |
1da177e4 LT |
1226 | } |
1227 | /* | |
1228 | * Remove old directory entry | |
1229 | */ | |
1230 | ||
1231 | ino = old_ip->i_ino; | |
1232 | rc = dtDelete(tid, old_dir, &old_dname, &ino, JFS_REMOVE); | |
1233 | if (rc) { | |
1234 | jfs_err("jfs_rename did not expect dtDelete to return rc = %d", | |
1235 | rc); | |
1236 | txAbort(tid, 1); /* Marks Filesystem dirty */ | |
26456955 | 1237 | goto out_tx; |
1da177e4 LT |
1238 | } |
1239 | if (S_ISDIR(old_ip->i_mode)) { | |
9a53c3a7 | 1240 | drop_nlink(old_dir); |
1da177e4 LT |
1241 | if (old_dir != new_dir) { |
1242 | /* | |
1243 | * Change inode number of parent for moved directory | |
1244 | */ | |
1245 | ||
1246 | JFS_IP(old_ip)->i_dtroot.header.idotdot = | |
1247 | cpu_to_le32(new_dir->i_ino); | |
1248 | ||
1249 | /* Linelock header of dtree */ | |
1250 | tlck = txLock(tid, old_ip, | |
1251 | (struct metapage *) &JFS_IP(old_ip)->bxflag, | |
1252 | tlckDTREE | tlckBTROOT | tlckRELINK); | |
1253 | dtlck = (struct dt_lock *) & tlck->lock; | |
1254 | ASSERT(dtlck->index == 0); | |
1255 | lv = & dtlck->lv[0]; | |
1256 | lv->offset = 0; | |
1257 | lv->length = 1; | |
1258 | dtlck->index++; | |
1259 | } | |
1260 | } | |
1261 | ||
1262 | /* | |
1263 | * Update ctime on changed/moved inodes & mark dirty | |
1264 | */ | |
078cd827 | 1265 | old_ip->i_ctime = current_time(old_ip); |
1da177e4 LT |
1266 | mark_inode_dirty(old_ip); |
1267 | ||
c2050a45 | 1268 | new_dir->i_ctime = new_dir->i_mtime = current_time(new_dir); |
1da177e4 LT |
1269 | mark_inode_dirty(new_dir); |
1270 | ||
1271 | /* Build list of inodes modified by this transaction */ | |
1272 | ipcount = 0; | |
1273 | iplist[ipcount++] = old_ip; | |
1274 | if (new_ip) | |
1275 | iplist[ipcount++] = new_ip; | |
1276 | iplist[ipcount++] = old_dir; | |
1277 | ||
1278 | if (old_dir != new_dir) { | |
1279 | iplist[ipcount++] = new_dir; | |
078cd827 | 1280 | old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir); |
1da177e4 LT |
1281 | mark_inode_dirty(old_dir); |
1282 | } | |
1283 | ||
1284 | /* | |
1285 | * Incomplete truncate of file data can | |
1286 | * result in timing problems unless we synchronously commit the | |
1287 | * transaction. | |
1288 | */ | |
1289 | if (new_size) | |
1290 | commit_flag = COMMIT_SYNC; | |
1291 | else | |
1292 | commit_flag = 0; | |
1293 | ||
1294 | rc = txCommit(tid, ipcount, iplist, commit_flag); | |
1295 | ||
26456955 | 1296 | out_tx: |
1da177e4 | 1297 | txEnd(tid); |
1da177e4 | 1298 | if (new_ip) |
1de87444 | 1299 | mutex_unlock(&JFS_IP(new_ip)->commit_mutex); |
48ce8b05 ED |
1300 | if (old_dir != new_dir) |
1301 | mutex_unlock(&JFS_IP(old_dir)->commit_mutex); | |
1302 | mutex_unlock(&JFS_IP(old_ip)->commit_mutex); | |
1303 | mutex_unlock(&JFS_IP(new_dir)->commit_mutex); | |
1da177e4 LT |
1304 | |
1305 | while (new_size && (rc == 0)) { | |
1306 | tid = txBegin(new_ip->i_sb, 0); | |
1de87444 | 1307 | mutex_lock(&JFS_IP(new_ip)->commit_mutex); |
1da177e4 LT |
1308 | new_size = xtTruncate_pmap(tid, new_ip, new_size); |
1309 | if (new_size < 0) { | |
1310 | txAbort(tid, 1); | |
63f83c9f | 1311 | rc = new_size; |
1da177e4 LT |
1312 | } else |
1313 | rc = txCommit(tid, 1, &new_ip, COMMIT_SYNC); | |
1314 | txEnd(tid); | |
1de87444 | 1315 | mutex_unlock(&JFS_IP(new_ip)->commit_mutex); |
1da177e4 LT |
1316 | } |
1317 | if (new_ip && (new_ip->i_nlink == 0)) | |
1318 | set_cflag(COMMIT_Nolink, new_ip); | |
1da177e4 LT |
1319 | /* |
1320 | * Truncating the directory index table is not guaranteed. It | |
1321 | * may need to be done iteratively | |
1322 | */ | |
1323 | if (test_cflag(COMMIT_Stale, old_dir)) { | |
1324 | if (old_dir->i_size > 1) | |
1325 | jfs_truncate_nolock(old_dir, 0); | |
1326 | ||
1327 | clear_cflag(COMMIT_Stale, old_dir); | |
1328 | } | |
acc84b05 | 1329 | out_unlock: |
26456955 DK |
1330 | if (new_ip && !S_ISDIR(new_ip->i_mode)) |
1331 | IWRITE_UNLOCK(new_ip); | |
1332 | out3: | |
1333 | free_UCSname(&new_dname); | |
1334 | out2: | |
1335 | free_UCSname(&old_dname); | |
1336 | out1: | |
1da177e4 LT |
1337 | jfs_info("jfs_rename: returning %d", rc); |
1338 | return rc; | |
1339 | } | |
1340 | ||
1341 | ||
1342 | /* | |
f720e3ba | 1343 | * NAME: jfs_mknod |
1da177e4 | 1344 | * |
f720e3ba | 1345 | * FUNCTION: Create a special file (device) |
1da177e4 LT |
1346 | */ |
1347 | static int jfs_mknod(struct inode *dir, struct dentry *dentry, | |
1a67aafb | 1348 | umode_t mode, dev_t rdev) |
1da177e4 LT |
1349 | { |
1350 | struct jfs_inode_info *jfs_ip; | |
1351 | struct btstack btstack; | |
1352 | struct component_name dname; | |
1353 | ino_t ino; | |
1354 | struct inode *ip; | |
1355 | struct inode *iplist[2]; | |
1356 | int rc; | |
1357 | tid_t tid; | |
1358 | struct tblock *tblk; | |
1359 | ||
a455589f | 1360 | jfs_info("jfs_mknod: %pd", dentry); |
1da177e4 | 1361 | |
acc84b05 DK |
1362 | rc = dquot_initialize(dir); |
1363 | if (rc) | |
1364 | goto out; | |
907f4554 | 1365 | |
1da177e4 LT |
1366 | if ((rc = get_UCSname(&dname, dentry))) |
1367 | goto out; | |
1368 | ||
1369 | ip = ialloc(dir, mode); | |
087387f9 AM |
1370 | if (IS_ERR(ip)) { |
1371 | rc = PTR_ERR(ip); | |
1da177e4 LT |
1372 | goto out1; |
1373 | } | |
1374 | jfs_ip = JFS_IP(ip); | |
1375 | ||
1376 | tid = txBegin(dir->i_sb, 0); | |
1377 | ||
82d5b9a7 DK |
1378 | mutex_lock_nested(&JFS_IP(dir)->commit_mutex, COMMIT_MUTEX_PARENT); |
1379 | mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); | |
1da177e4 | 1380 | |
4f4b401b DK |
1381 | rc = jfs_init_acl(tid, ip, dir); |
1382 | if (rc) | |
1da177e4 LT |
1383 | goto out3; |
1384 | ||
2a7dba39 | 1385 | rc = jfs_init_security(tid, ip, dir, &dentry->d_name); |
1d15b10f DK |
1386 | if (rc) { |
1387 | txAbort(tid, 0); | |
1388 | goto out3; | |
1389 | } | |
1390 | ||
4f4b401b DK |
1391 | if ((rc = dtSearch(dir, &dname, &ino, &btstack, JFS_CREATE))) { |
1392 | txAbort(tid, 0); | |
1393 | goto out3; | |
1394 | } | |
1395 | ||
1da177e4 LT |
1396 | tblk = tid_to_tblock(tid); |
1397 | tblk->xflag |= COMMIT_CREATE; | |
1398 | tblk->ino = ip->i_ino; | |
1399 | tblk->u.ixpxd = JFS_IP(ip)->ixpxd; | |
1400 | ||
1401 | ino = ip->i_ino; | |
4f4b401b DK |
1402 | if ((rc = dtInsert(tid, dir, &dname, &ino, &btstack))) { |
1403 | txAbort(tid, 0); | |
1da177e4 | 1404 | goto out3; |
4f4b401b | 1405 | } |
1da177e4 LT |
1406 | |
1407 | ip->i_op = &jfs_file_inode_operations; | |
1408 | jfs_ip->dev = new_encode_dev(rdev); | |
1409 | init_special_inode(ip, ip->i_mode, rdev); | |
1410 | ||
1da177e4 LT |
1411 | mark_inode_dirty(ip); |
1412 | ||
078cd827 | 1413 | dir->i_ctime = dir->i_mtime = current_time(dir); |
1da177e4 LT |
1414 | |
1415 | mark_inode_dirty(dir); | |
1416 | ||
1417 | iplist[0] = dir; | |
1418 | iplist[1] = ip; | |
1419 | rc = txCommit(tid, 2, iplist, 0); | |
1420 | ||
1421 | out3: | |
1422 | txEnd(tid); | |
1de87444 IM |
1423 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
1424 | mutex_unlock(&JFS_IP(dir)->commit_mutex); | |
1da177e4 | 1425 | if (rc) { |
4f4b401b | 1426 | free_ea_wmap(ip); |
6d6b77f1 | 1427 | clear_nlink(ip); |
a6cbedfa | 1428 | discard_new_inode(ip); |
1f3403fa | 1429 | } else { |
1e2e547a | 1430 | d_instantiate_new(dentry, ip); |
1f3403fa | 1431 | } |
1da177e4 LT |
1432 | |
1433 | out1: | |
1434 | free_UCSname(&dname); | |
1435 | ||
1da177e4 LT |
1436 | out: |
1437 | jfs_info("jfs_mknod: returning %d", rc); | |
1438 | return rc; | |
1439 | } | |
1440 | ||
00cd8dd3 | 1441 | static struct dentry *jfs_lookup(struct inode *dip, struct dentry *dentry, unsigned int flags) |
1da177e4 LT |
1442 | { |
1443 | struct btstack btstack; | |
1444 | ino_t inum; | |
1445 | struct inode *ip; | |
1446 | struct component_name key; | |
1da177e4 LT |
1447 | int rc; |
1448 | ||
a455589f | 1449 | jfs_info("jfs_lookup: name = %pd", dentry); |
79ac5a46 AV |
1450 | |
1451 | if ((rc = get_UCSname(&key, dentry))) | |
1452 | return ERR_PTR(rc); | |
1453 | rc = dtSearch(dip, &key, &inum, &btstack, JFS_LOOKUP); | |
1454 | free_UCSname(&key); | |
1455 | if (rc == -ENOENT) { | |
1456 | ip = NULL; | |
1457 | } else if (rc) { | |
1458 | jfs_err("jfs_lookup: dtSearch returned %d", rc); | |
1459 | ip = ERR_PTR(rc); | |
1460 | } else { | |
1461 | ip = jfs_iget(dip->i_sb, inum); | |
1462 | if (IS_ERR(ip)) | |
1463 | jfs_err("jfs_lookup: iget failed on inum %d", (uint)inum); | |
1da177e4 LT |
1464 | } |
1465 | ||
94b77bd8 | 1466 | return d_splice_alias(ip, dentry); |
1da177e4 LT |
1467 | } |
1468 | ||
d425de70 CH |
1469 | static struct inode *jfs_nfs_get_inode(struct super_block *sb, |
1470 | u64 ino, u32 generation) | |
5ca29607 | 1471 | { |
5ca29607 | 1472 | struct inode *inode; |
5ca29607 CH |
1473 | |
1474 | if (ino == 0) | |
1475 | return ERR_PTR(-ESTALE); | |
eab1df71 DH |
1476 | inode = jfs_iget(sb, ino); |
1477 | if (IS_ERR(inode)) | |
1478 | return ERR_CAST(inode); | |
5ca29607 | 1479 | |
eab1df71 | 1480 | if (generation && inode->i_generation != generation) { |
d425de70 CH |
1481 | iput(inode); |
1482 | return ERR_PTR(-ESTALE); | |
5ca29607 CH |
1483 | } |
1484 | ||
d425de70 CH |
1485 | return inode; |
1486 | } | |
5ca29607 | 1487 | |
d425de70 CH |
1488 | struct dentry *jfs_fh_to_dentry(struct super_block *sb, struct fid *fid, |
1489 | int fh_len, int fh_type) | |
1490 | { | |
1491 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
1492 | jfs_nfs_get_inode); | |
1493 | } | |
1494 | ||
1495 | struct dentry *jfs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
1496 | int fh_len, int fh_type) | |
1497 | { | |
1498 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
1499 | jfs_nfs_get_inode); | |
5ca29607 CH |
1500 | } |
1501 | ||
1da177e4 LT |
1502 | struct dentry *jfs_get_parent(struct dentry *dentry) |
1503 | { | |
1da177e4 LT |
1504 | unsigned long parent_ino; |
1505 | ||
1506 | parent_ino = | |
2b0143b5 | 1507 | le32_to_cpu(JFS_IP(d_inode(dentry))->i_dtroot.header.idotdot); |
1da177e4 | 1508 | |
fc64005c | 1509 | return d_obtain_alias(jfs_iget(dentry->d_sb, parent_ino)); |
1da177e4 LT |
1510 | } |
1511 | ||
92e1d5be | 1512 | const struct inode_operations jfs_dir_inode_operations = { |
1da177e4 LT |
1513 | .create = jfs_create, |
1514 | .lookup = jfs_lookup, | |
1515 | .link = jfs_link, | |
1516 | .unlink = jfs_unlink, | |
1517 | .symlink = jfs_symlink, | |
1518 | .mkdir = jfs_mkdir, | |
1519 | .rmdir = jfs_rmdir, | |
1520 | .mknod = jfs_mknod, | |
1521 | .rename = jfs_rename, | |
1da177e4 | 1522 | .listxattr = jfs_listxattr, |
1da177e4 | 1523 | .setattr = jfs_setattr, |
759bfee6 | 1524 | #ifdef CONFIG_JFS_POSIX_ACL |
4e34e719 | 1525 | .get_acl = jfs_get_acl, |
2cc6a5a0 | 1526 | .set_acl = jfs_set_acl, |
1da177e4 LT |
1527 | #endif |
1528 | }; | |
1529 | ||
4b6f5d20 | 1530 | const struct file_operations jfs_dir_operations = { |
1da177e4 | 1531 | .read = generic_read_dir, |
070a0ebf | 1532 | .iterate = jfs_readdir, |
1da177e4 | 1533 | .fsync = jfs_fsync, |
baab81fa | 1534 | .unlocked_ioctl = jfs_ioctl, |
ef1fc2f0 AK |
1535 | #ifdef CONFIG_COMPAT |
1536 | .compat_ioctl = jfs_compat_ioctl, | |
1537 | #endif | |
3222a3e5 | 1538 | .llseek = generic_file_llseek, |
1da177e4 LT |
1539 | }; |
1540 | ||
da53be12 | 1541 | static int jfs_ci_hash(const struct dentry *dir, struct qstr *this) |
1da177e4 LT |
1542 | { |
1543 | unsigned long hash; | |
1544 | int i; | |
1545 | ||
8387ff25 | 1546 | hash = init_name_hash(dir); |
1da177e4 LT |
1547 | for (i=0; i < this->len; i++) |
1548 | hash = partial_name_hash(tolower(this->name[i]), hash); | |
1549 | this->hash = end_name_hash(hash); | |
1550 | ||
1551 | return 0; | |
1552 | } | |
1553 | ||
6fa67e70 | 1554 | static int jfs_ci_compare(const struct dentry *dentry, |
621e155a | 1555 | unsigned int len, const char *str, const struct qstr *name) |
1da177e4 LT |
1556 | { |
1557 | int i, result = 1; | |
1558 | ||
621e155a | 1559 | if (len != name->len) |
1da177e4 | 1560 | goto out; |
621e155a NP |
1561 | for (i=0; i < len; i++) { |
1562 | if (tolower(str[i]) != tolower(name->name[i])) | |
1da177e4 LT |
1563 | goto out; |
1564 | } | |
1565 | result = 0; | |
2bc334dc NP |
1566 | out: |
1567 | return result; | |
1568 | } | |
1da177e4 | 1569 | |
0b728e19 | 1570 | static int jfs_ci_revalidate(struct dentry *dentry, unsigned int flags) |
2bc334dc | 1571 | { |
1da177e4 | 1572 | /* |
2bc334dc NP |
1573 | * This is not negative dentry. Always valid. |
1574 | * | |
1575 | * Note, rename() to existing directory entry will have ->d_inode, | |
1576 | * and will use existing name which isn't specified name by user. | |
1577 | * | |
1578 | * We may be able to drop this positive dentry here. But dropping | |
1579 | * positive dentry isn't good idea. So it's unsupported like | |
1580 | * rename("filename", "FILENAME") for now. | |
1da177e4 | 1581 | */ |
2b0143b5 | 1582 | if (d_really_is_positive(dentry)) |
2bc334dc NP |
1583 | return 1; |
1584 | ||
1585 | /* | |
1586 | * This may be nfsd (or something), anyway, we can't see the | |
1587 | * intent of this. So, since this can be for creation, drop it. | |
1588 | */ | |
0b728e19 | 1589 | if (!flags) |
2bc334dc NP |
1590 | return 0; |
1591 | ||
1592 | /* | |
1593 | * Drop the negative dentry, in order to make sure to use the | |
1594 | * case sensitive name which is specified by user if this is | |
1595 | * for creation. | |
1596 | */ | |
0b728e19 | 1597 | if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET)) |
407938e7 | 1598 | return 0; |
2bc334dc | 1599 | return 1; |
1da177e4 LT |
1600 | } |
1601 | ||
ad28b4ef | 1602 | const struct dentry_operations jfs_ci_dentry_operations = |
1da177e4 LT |
1603 | { |
1604 | .d_hash = jfs_ci_hash, | |
1605 | .d_compare = jfs_ci_compare, | |
2bc334dc | 1606 | .d_revalidate = jfs_ci_revalidate, |
1da177e4 | 1607 | }; |