Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Copyright (C) International Business Machines Corp., 2000-2004 | |
3 | * Portions Copyright (C) Christoph Hellwig, 2001-2002 | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
63f83c9f | 7 | * the Free Software Foundation; either version 2 of the License, or |
1da177e4 | 8 | * (at your option) any later version. |
63f83c9f | 9 | * |
1da177e4 LT |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
13 | * the GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
63f83c9f | 16 | * along with this program; if not, write to the Free Software |
1da177e4 LT |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
18 | */ | |
19 | ||
20 | #include <linux/fs.h> | |
21 | #include <linux/ctype.h> | |
22 | #include <linux/quotaops.h> | |
d425de70 | 23 | #include <linux/exportfs.h> |
1da177e4 LT |
24 | #include "jfs_incore.h" |
25 | #include "jfs_superblock.h" | |
26 | #include "jfs_inode.h" | |
27 | #include "jfs_dinode.h" | |
28 | #include "jfs_dmap.h" | |
29 | #include "jfs_unicode.h" | |
30 | #include "jfs_metapage.h" | |
31 | #include "jfs_xattr.h" | |
32 | #include "jfs_acl.h" | |
33 | #include "jfs_debug.h" | |
34 | ||
1da177e4 LT |
35 | /* |
36 | * forward references | |
37 | */ | |
ad28b4ef | 38 | const struct dentry_operations jfs_ci_dentry_operations; |
1da177e4 LT |
39 | |
40 | static s64 commitZeroLink(tid_t, struct inode *); | |
41 | ||
4f4b401b DK |
42 | /* |
43 | * NAME: free_ea_wmap(inode) | |
44 | * | |
63f83c9f | 45 | * FUNCTION: free uncommitted extended attributes from working map |
4f4b401b DK |
46 | * |
47 | */ | |
48 | static inline void free_ea_wmap(struct inode *inode) | |
49 | { | |
50 | dxd_t *ea = &JFS_IP(inode)->ea; | |
51 | ||
52 | if (ea->flag & DXD_EXTENT) { | |
53 | /* free EA pages from cache */ | |
54 | invalidate_dxd_metapages(inode, *ea); | |
55 | dbFree(inode, addressDXD(ea), lengthDXD(ea)); | |
56 | } | |
57 | ea->flag = 0; | |
58 | } | |
59 | ||
1da177e4 LT |
60 | /* |
61 | * NAME: jfs_create(dip, dentry, mode) | |
62 | * | |
63 | * FUNCTION: create a regular file in the parent directory <dip> | |
64 | * with name = <from dentry> and mode = <mode> | |
65 | * | |
63f83c9f | 66 | * PARAMETER: dip - parent directory vnode |
1da177e4 LT |
67 | * dentry - dentry of new file |
68 | * mode - create mode (rwxrwxrwx). | |
69 | * nd- nd struct | |
70 | * | |
71 | * RETURN: Errors from subroutines | |
72 | * | |
73 | */ | |
74 | static int jfs_create(struct inode *dip, struct dentry *dentry, int mode, | |
75 | struct nameidata *nd) | |
76 | { | |
77 | int rc = 0; | |
78 | tid_t tid; /* transaction id */ | |
79 | struct inode *ip = NULL; /* child directory inode */ | |
80 | ino_t ino; | |
81 | struct component_name dname; /* child directory name */ | |
82 | struct btstack btstack; | |
83 | struct inode *iplist[2]; | |
84 | struct tblock *tblk; | |
85 | ||
86 | jfs_info("jfs_create: dip:0x%p name:%s", dip, dentry->d_name.name); | |
87 | ||
88 | /* | |
89 | * search parent directory for entry/freespace | |
90 | * (dtSearch() returns parent directory page pinned) | |
91 | */ | |
92 | if ((rc = get_UCSname(&dname, dentry))) | |
93 | goto out1; | |
94 | ||
95 | /* | |
96 | * Either iAlloc() or txBegin() may block. Deadlock can occur if we | |
97 | * block there while holding dtree page, so we allocate the inode & | |
98 | * begin the transaction before we search the directory. | |
99 | */ | |
100 | ip = ialloc(dip, mode); | |
087387f9 AM |
101 | if (IS_ERR(ip)) { |
102 | rc = PTR_ERR(ip); | |
1da177e4 LT |
103 | goto out2; |
104 | } | |
105 | ||
106 | tid = txBegin(dip->i_sb, 0); | |
107 | ||
82d5b9a7 DK |
108 | mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); |
109 | mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); | |
1da177e4 | 110 | |
4f4b401b DK |
111 | rc = jfs_init_acl(tid, ip, dip); |
112 | if (rc) | |
113 | goto out3; | |
114 | ||
1d15b10f DK |
115 | rc = jfs_init_security(tid, ip, dip); |
116 | if (rc) { | |
117 | txAbort(tid, 0); | |
118 | goto out3; | |
119 | } | |
120 | ||
1da177e4 LT |
121 | if ((rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE))) { |
122 | jfs_err("jfs_create: dtSearch returned %d", rc); | |
4f4b401b | 123 | txAbort(tid, 0); |
1da177e4 LT |
124 | goto out3; |
125 | } | |
126 | ||
127 | tblk = tid_to_tblock(tid); | |
128 | tblk->xflag |= COMMIT_CREATE; | |
129 | tblk->ino = ip->i_ino; | |
130 | tblk->u.ixpxd = JFS_IP(ip)->ixpxd; | |
131 | ||
132 | iplist[0] = dip; | |
133 | iplist[1] = ip; | |
134 | ||
135 | /* | |
136 | * initialize the child XAD tree root in-line in inode | |
137 | */ | |
138 | xtInitRoot(tid, ip); | |
139 | ||
140 | /* | |
141 | * create entry in parent directory for child directory | |
142 | * (dtInsert() releases parent directory page) | |
143 | */ | |
144 | ino = ip->i_ino; | |
145 | if ((rc = dtInsert(tid, dip, &dname, &ino, &btstack))) { | |
146 | if (rc == -EIO) { | |
147 | jfs_err("jfs_create: dtInsert returned -EIO"); | |
148 | txAbort(tid, 1); /* Marks Filesystem dirty */ | |
149 | } else | |
150 | txAbort(tid, 0); /* Filesystem full */ | |
151 | goto out3; | |
152 | } | |
153 | ||
154 | ip->i_op = &jfs_file_inode_operations; | |
155 | ip->i_fop = &jfs_file_operations; | |
156 | ip->i_mapping->a_ops = &jfs_aops; | |
157 | ||
1da177e4 LT |
158 | mark_inode_dirty(ip); |
159 | ||
160 | dip->i_ctime = dip->i_mtime = CURRENT_TIME; | |
161 | ||
162 | mark_inode_dirty(dip); | |
163 | ||
164 | rc = txCommit(tid, 2, &iplist[0], 0); | |
165 | ||
166 | out3: | |
167 | txEnd(tid); | |
1de87444 | 168 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 169 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 | 170 | if (rc) { |
4f4b401b | 171 | free_ea_wmap(ip); |
1da177e4 | 172 | ip->i_nlink = 0; |
1f3403fa | 173 | unlock_new_inode(ip); |
1da177e4 | 174 | iput(ip); |
1f3403fa | 175 | } else { |
1da177e4 | 176 | d_instantiate(dentry, ip); |
1f3403fa DK |
177 | unlock_new_inode(ip); |
178 | } | |
1da177e4 LT |
179 | |
180 | out2: | |
181 | free_UCSname(&dname); | |
182 | ||
1da177e4 LT |
183 | out1: |
184 | ||
185 | jfs_info("jfs_create: rc:%d", rc); | |
186 | return rc; | |
187 | } | |
188 | ||
189 | ||
190 | /* | |
191 | * NAME: jfs_mkdir(dip, dentry, mode) | |
192 | * | |
193 | * FUNCTION: create a child directory in the parent directory <dip> | |
194 | * with name = <from dentry> and mode = <mode> | |
195 | * | |
63f83c9f | 196 | * PARAMETER: dip - parent directory vnode |
1da177e4 LT |
197 | * dentry - dentry of child directory |
198 | * mode - create mode (rwxrwxrwx). | |
199 | * | |
200 | * RETURN: Errors from subroutines | |
201 | * | |
202 | * note: | |
203 | * EACCESS: user needs search+write permission on the parent directory | |
204 | */ | |
205 | static int jfs_mkdir(struct inode *dip, struct dentry *dentry, int mode) | |
206 | { | |
207 | int rc = 0; | |
208 | tid_t tid; /* transaction id */ | |
209 | struct inode *ip = NULL; /* child directory inode */ | |
210 | ino_t ino; | |
211 | struct component_name dname; /* child directory name */ | |
212 | struct btstack btstack; | |
213 | struct inode *iplist[2]; | |
214 | struct tblock *tblk; | |
215 | ||
216 | jfs_info("jfs_mkdir: dip:0x%p name:%s", dip, dentry->d_name.name); | |
217 | ||
218 | /* link count overflow on parent directory ? */ | |
219 | if (dip->i_nlink == JFS_LINK_MAX) { | |
220 | rc = -EMLINK; | |
221 | goto out1; | |
222 | } | |
223 | ||
224 | /* | |
225 | * search parent directory for entry/freespace | |
226 | * (dtSearch() returns parent directory page pinned) | |
227 | */ | |
228 | if ((rc = get_UCSname(&dname, dentry))) | |
229 | goto out1; | |
230 | ||
231 | /* | |
232 | * Either iAlloc() or txBegin() may block. Deadlock can occur if we | |
233 | * block there while holding dtree page, so we allocate the inode & | |
234 | * begin the transaction before we search the directory. | |
235 | */ | |
236 | ip = ialloc(dip, S_IFDIR | mode); | |
087387f9 AM |
237 | if (IS_ERR(ip)) { |
238 | rc = PTR_ERR(ip); | |
1da177e4 LT |
239 | goto out2; |
240 | } | |
241 | ||
242 | tid = txBegin(dip->i_sb, 0); | |
243 | ||
82d5b9a7 DK |
244 | mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); |
245 | mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); | |
1da177e4 | 246 | |
4f4b401b DK |
247 | rc = jfs_init_acl(tid, ip, dip); |
248 | if (rc) | |
249 | goto out3; | |
250 | ||
1d15b10f DK |
251 | rc = jfs_init_security(tid, ip, dip); |
252 | if (rc) { | |
253 | txAbort(tid, 0); | |
254 | goto out3; | |
255 | } | |
256 | ||
1da177e4 LT |
257 | if ((rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE))) { |
258 | jfs_err("jfs_mkdir: dtSearch returned %d", rc); | |
4f4b401b | 259 | txAbort(tid, 0); |
1da177e4 LT |
260 | goto out3; |
261 | } | |
262 | ||
263 | tblk = tid_to_tblock(tid); | |
264 | tblk->xflag |= COMMIT_CREATE; | |
265 | tblk->ino = ip->i_ino; | |
266 | tblk->u.ixpxd = JFS_IP(ip)->ixpxd; | |
267 | ||
268 | iplist[0] = dip; | |
269 | iplist[1] = ip; | |
270 | ||
271 | /* | |
272 | * initialize the child directory in-line in inode | |
273 | */ | |
274 | dtInitRoot(tid, ip, dip->i_ino); | |
275 | ||
276 | /* | |
277 | * create entry in parent directory for child directory | |
278 | * (dtInsert() releases parent directory page) | |
279 | */ | |
280 | ino = ip->i_ino; | |
281 | if ((rc = dtInsert(tid, dip, &dname, &ino, &btstack))) { | |
282 | if (rc == -EIO) { | |
283 | jfs_err("jfs_mkdir: dtInsert returned -EIO"); | |
284 | txAbort(tid, 1); /* Marks Filesystem dirty */ | |
285 | } else | |
286 | txAbort(tid, 0); /* Filesystem full */ | |
287 | goto out3; | |
288 | } | |
289 | ||
290 | ip->i_nlink = 2; /* for '.' */ | |
291 | ip->i_op = &jfs_dir_inode_operations; | |
292 | ip->i_fop = &jfs_dir_operations; | |
293 | ||
1da177e4 LT |
294 | mark_inode_dirty(ip); |
295 | ||
296 | /* update parent directory inode */ | |
d8c76e6f | 297 | inc_nlink(dip); /* for '..' from child directory */ |
1da177e4 LT |
298 | dip->i_ctime = dip->i_mtime = CURRENT_TIME; |
299 | mark_inode_dirty(dip); | |
300 | ||
301 | rc = txCommit(tid, 2, &iplist[0], 0); | |
302 | ||
303 | out3: | |
304 | txEnd(tid); | |
1de87444 | 305 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 306 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 | 307 | if (rc) { |
4f4b401b | 308 | free_ea_wmap(ip); |
1da177e4 | 309 | ip->i_nlink = 0; |
1f3403fa | 310 | unlock_new_inode(ip); |
1da177e4 | 311 | iput(ip); |
1f3403fa | 312 | } else { |
1da177e4 | 313 | d_instantiate(dentry, ip); |
1f3403fa DK |
314 | unlock_new_inode(ip); |
315 | } | |
1da177e4 LT |
316 | |
317 | out2: | |
318 | free_UCSname(&dname); | |
319 | ||
1da177e4 LT |
320 | |
321 | out1: | |
322 | ||
323 | jfs_info("jfs_mkdir: rc:%d", rc); | |
324 | return rc; | |
325 | } | |
326 | ||
327 | /* | |
328 | * NAME: jfs_rmdir(dip, dentry) | |
329 | * | |
330 | * FUNCTION: remove a link to child directory | |
331 | * | |
63f83c9f | 332 | * PARAMETER: dip - parent inode |
1da177e4 LT |
333 | * dentry - child directory dentry |
334 | * | |
335 | * RETURN: -EINVAL - if name is . or .. | |
f720e3ba | 336 | * -EINVAL - if . or .. exist but are invalid. |
1da177e4 LT |
337 | * errors from subroutines |
338 | * | |
339 | * note: | |
63f83c9f DK |
340 | * if other threads have the directory open when the last link |
341 | * is removed, the "." and ".." entries, if present, are removed before | |
342 | * rmdir() returns and no new entries may be created in the directory, | |
343 | * but the directory is not removed until the last reference to | |
1da177e4 LT |
344 | * the directory is released (cf.unlink() of regular file). |
345 | */ | |
346 | static int jfs_rmdir(struct inode *dip, struct dentry *dentry) | |
347 | { | |
348 | int rc; | |
349 | tid_t tid; /* transaction id */ | |
350 | struct inode *ip = dentry->d_inode; | |
351 | ino_t ino; | |
352 | struct component_name dname; | |
353 | struct inode *iplist[2]; | |
354 | struct tblock *tblk; | |
355 | ||
356 | jfs_info("jfs_rmdir: dip:0x%p name:%s", dip, dentry->d_name.name); | |
357 | ||
358 | /* Init inode for quota operations. */ | |
c94d2a22 | 359 | vfs_dq_init(ip); |
1da177e4 LT |
360 | |
361 | /* directory must be empty to be removed */ | |
362 | if (!dtEmpty(ip)) { | |
363 | rc = -ENOTEMPTY; | |
364 | goto out; | |
365 | } | |
366 | ||
367 | if ((rc = get_UCSname(&dname, dentry))) { | |
368 | goto out; | |
369 | } | |
370 | ||
371 | tid = txBegin(dip->i_sb, 0); | |
372 | ||
82d5b9a7 DK |
373 | mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); |
374 | mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); | |
1da177e4 LT |
375 | |
376 | iplist[0] = dip; | |
377 | iplist[1] = ip; | |
378 | ||
379 | tblk = tid_to_tblock(tid); | |
380 | tblk->xflag |= COMMIT_DELETE; | |
381 | tblk->u.ip = ip; | |
382 | ||
383 | /* | |
384 | * delete the entry of target directory from parent directory | |
385 | */ | |
386 | ino = ip->i_ino; | |
387 | if ((rc = dtDelete(tid, dip, &dname, &ino, JFS_REMOVE))) { | |
388 | jfs_err("jfs_rmdir: dtDelete returned %d", rc); | |
389 | if (rc == -EIO) | |
390 | txAbort(tid, 1); | |
391 | txEnd(tid); | |
1de87444 | 392 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 393 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 LT |
394 | |
395 | goto out2; | |
396 | } | |
397 | ||
398 | /* update parent directory's link count corresponding | |
399 | * to ".." entry of the target directory deleted | |
400 | */ | |
1da177e4 | 401 | dip->i_ctime = dip->i_mtime = CURRENT_TIME; |
9a53c3a7 | 402 | inode_dec_link_count(dip); |
1da177e4 LT |
403 | |
404 | /* | |
405 | * OS/2 could have created EA and/or ACL | |
406 | */ | |
407 | /* free EA from both persistent and working map */ | |
408 | if (JFS_IP(ip)->ea.flag & DXD_EXTENT) { | |
409 | /* free EA pages */ | |
410 | txEA(tid, ip, &JFS_IP(ip)->ea, NULL); | |
411 | } | |
412 | JFS_IP(ip)->ea.flag = 0; | |
413 | ||
414 | /* free ACL from both persistent and working map */ | |
415 | if (JFS_IP(ip)->acl.flag & DXD_EXTENT) { | |
416 | /* free ACL pages */ | |
417 | txEA(tid, ip, &JFS_IP(ip)->acl, NULL); | |
418 | } | |
419 | JFS_IP(ip)->acl.flag = 0; | |
420 | ||
421 | /* mark the target directory as deleted */ | |
ce71ec36 | 422 | clear_nlink(ip); |
1da177e4 LT |
423 | mark_inode_dirty(ip); |
424 | ||
425 | rc = txCommit(tid, 2, &iplist[0], 0); | |
426 | ||
427 | txEnd(tid); | |
428 | ||
1de87444 | 429 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 430 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 LT |
431 | |
432 | /* | |
433 | * Truncating the directory index table is not guaranteed. It | |
434 | * may need to be done iteratively | |
435 | */ | |
436 | if (test_cflag(COMMIT_Stale, dip)) { | |
437 | if (dip->i_size > 1) | |
438 | jfs_truncate_nolock(dip, 0); | |
439 | ||
440 | clear_cflag(COMMIT_Stale, dip); | |
441 | } | |
442 | ||
443 | out2: | |
444 | free_UCSname(&dname); | |
445 | ||
446 | out: | |
447 | jfs_info("jfs_rmdir: rc:%d", rc); | |
448 | return rc; | |
449 | } | |
450 | ||
451 | /* | |
452 | * NAME: jfs_unlink(dip, dentry) | |
453 | * | |
63f83c9f | 454 | * FUNCTION: remove a link to object <vp> named by <name> |
1da177e4 LT |
455 | * from parent directory <dvp> |
456 | * | |
63f83c9f DK |
457 | * PARAMETER: dip - inode of parent directory |
458 | * dentry - dentry of object to be removed | |
1da177e4 LT |
459 | * |
460 | * RETURN: errors from subroutines | |
461 | * | |
462 | * note: | |
463 | * temporary file: if one or more processes have the file open | |
464 | * when the last link is removed, the link will be removed before | |
465 | * unlink() returns, but the removal of the file contents will be | |
466 | * postponed until all references to the files are closed. | |
467 | * | |
468 | * JFS does NOT support unlink() on directories. | |
469 | * | |
470 | */ | |
471 | static int jfs_unlink(struct inode *dip, struct dentry *dentry) | |
472 | { | |
473 | int rc; | |
474 | tid_t tid; /* transaction id */ | |
475 | struct inode *ip = dentry->d_inode; | |
476 | ino_t ino; | |
477 | struct component_name dname; /* object name */ | |
478 | struct inode *iplist[2]; | |
479 | struct tblock *tblk; | |
480 | s64 new_size = 0; | |
481 | int commit_flag; | |
482 | ||
483 | jfs_info("jfs_unlink: dip:0x%p name:%s", dip, dentry->d_name.name); | |
484 | ||
485 | /* Init inode for quota operations. */ | |
c94d2a22 | 486 | vfs_dq_init(ip); |
1da177e4 LT |
487 | |
488 | if ((rc = get_UCSname(&dname, dentry))) | |
489 | goto out; | |
490 | ||
82d5b9a7 | 491 | IWRITE_LOCK(ip, RDWRLOCK_NORMAL); |
1da177e4 LT |
492 | |
493 | tid = txBegin(dip->i_sb, 0); | |
494 | ||
82d5b9a7 DK |
495 | mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); |
496 | mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); | |
1da177e4 LT |
497 | |
498 | iplist[0] = dip; | |
499 | iplist[1] = ip; | |
500 | ||
501 | /* | |
502 | * delete the entry of target file from parent directory | |
503 | */ | |
504 | ino = ip->i_ino; | |
505 | if ((rc = dtDelete(tid, dip, &dname, &ino, JFS_REMOVE))) { | |
506 | jfs_err("jfs_unlink: dtDelete returned %d", rc); | |
507 | if (rc == -EIO) | |
508 | txAbort(tid, 1); /* Marks FS Dirty */ | |
509 | txEnd(tid); | |
1de87444 | 510 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 511 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 LT |
512 | IWRITE_UNLOCK(ip); |
513 | goto out1; | |
514 | } | |
515 | ||
516 | ASSERT(ip->i_nlink); | |
517 | ||
518 | ip->i_ctime = dip->i_ctime = dip->i_mtime = CURRENT_TIME; | |
519 | mark_inode_dirty(dip); | |
520 | ||
521 | /* update target's inode */ | |
9a53c3a7 | 522 | inode_dec_link_count(ip); |
1da177e4 LT |
523 | |
524 | /* | |
f720e3ba | 525 | * commit zero link count object |
1da177e4 LT |
526 | */ |
527 | if (ip->i_nlink == 0) { | |
528 | assert(!test_cflag(COMMIT_Nolink, ip)); | |
529 | /* free block resources */ | |
530 | if ((new_size = commitZeroLink(tid, ip)) < 0) { | |
531 | txAbort(tid, 1); /* Marks FS Dirty */ | |
532 | txEnd(tid); | |
1de87444 | 533 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 534 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 LT |
535 | IWRITE_UNLOCK(ip); |
536 | rc = new_size; | |
537 | goto out1; | |
538 | } | |
539 | tblk = tid_to_tblock(tid); | |
540 | tblk->xflag |= COMMIT_DELETE; | |
541 | tblk->u.ip = ip; | |
542 | } | |
543 | ||
544 | /* | |
545 | * Incomplete truncate of file data can | |
546 | * result in timing problems unless we synchronously commit the | |
547 | * transaction. | |
548 | */ | |
549 | if (new_size) | |
550 | commit_flag = COMMIT_SYNC; | |
551 | else | |
552 | commit_flag = 0; | |
553 | ||
554 | /* | |
555 | * If xtTruncate was incomplete, commit synchronously to avoid | |
556 | * timing complications | |
557 | */ | |
558 | rc = txCommit(tid, 2, &iplist[0], commit_flag); | |
559 | ||
560 | txEnd(tid); | |
561 | ||
1de87444 | 562 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 563 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 LT |
564 | |
565 | while (new_size && (rc == 0)) { | |
566 | tid = txBegin(dip->i_sb, 0); | |
1de87444 | 567 | mutex_lock(&JFS_IP(ip)->commit_mutex); |
1da177e4 LT |
568 | new_size = xtTruncate_pmap(tid, ip, new_size); |
569 | if (new_size < 0) { | |
570 | txAbort(tid, 1); /* Marks FS Dirty */ | |
571 | rc = new_size; | |
572 | } else | |
573 | rc = txCommit(tid, 2, &iplist[0], COMMIT_SYNC); | |
574 | txEnd(tid); | |
1de87444 | 575 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
1da177e4 LT |
576 | } |
577 | ||
578 | if (ip->i_nlink == 0) | |
579 | set_cflag(COMMIT_Nolink, ip); | |
580 | ||
581 | IWRITE_UNLOCK(ip); | |
582 | ||
583 | /* | |
584 | * Truncating the directory index table is not guaranteed. It | |
585 | * may need to be done iteratively | |
586 | */ | |
587 | if (test_cflag(COMMIT_Stale, dip)) { | |
588 | if (dip->i_size > 1) | |
589 | jfs_truncate_nolock(dip, 0); | |
590 | ||
591 | clear_cflag(COMMIT_Stale, dip); | |
592 | } | |
593 | ||
594 | out1: | |
595 | free_UCSname(&dname); | |
596 | out: | |
597 | jfs_info("jfs_unlink: rc:%d", rc); | |
598 | return rc; | |
599 | } | |
600 | ||
601 | /* | |
602 | * NAME: commitZeroLink() | |
603 | * | |
f720e3ba | 604 | * FUNCTION: for non-directory, called by jfs_remove(), |
1da177e4 | 605 | * truncate a regular file, directory or symbolic |
63f83c9f | 606 | * link to zero length. return 0 if type is not |
1da177e4 LT |
607 | * one of these. |
608 | * | |
609 | * if the file is currently associated with a VM segment | |
610 | * only permanent disk and inode map resources are freed, | |
611 | * and neither the inode nor indirect blocks are modified | |
612 | * so that the resources can be later freed in the work | |
613 | * map by ctrunc1. | |
614 | * if there is no VM segment on entry, the resources are | |
615 | * freed in both work and permanent map. | |
63f83c9f | 616 | * (? for temporary file - memory object is cached even |
1da177e4 LT |
617 | * after no reference: |
618 | * reference count > 0 - ) | |
619 | * | |
620 | * PARAMETERS: cd - pointer to commit data structure. | |
621 | * current inode is the one to truncate. | |
622 | * | |
623 | * RETURN: Errors from subroutines | |
624 | */ | |
625 | static s64 commitZeroLink(tid_t tid, struct inode *ip) | |
626 | { | |
627 | int filetype; | |
628 | struct tblock *tblk; | |
629 | ||
630 | jfs_info("commitZeroLink: tid = %d, ip = 0x%p", tid, ip); | |
631 | ||
632 | filetype = ip->i_mode & S_IFMT; | |
633 | switch (filetype) { | |
634 | case S_IFREG: | |
635 | break; | |
636 | case S_IFLNK: | |
637 | /* fast symbolic link */ | |
638 | if (ip->i_size < IDATASIZE) { | |
639 | ip->i_size = 0; | |
640 | return 0; | |
641 | } | |
642 | break; | |
643 | default: | |
644 | assert(filetype != S_IFDIR); | |
645 | return 0; | |
646 | } | |
647 | ||
648 | set_cflag(COMMIT_Freewmap, ip); | |
649 | ||
650 | /* mark transaction of block map update type */ | |
651 | tblk = tid_to_tblock(tid); | |
652 | tblk->xflag |= COMMIT_PMAP; | |
653 | ||
654 | /* | |
655 | * free EA | |
656 | */ | |
657 | if (JFS_IP(ip)->ea.flag & DXD_EXTENT) | |
658 | /* acquire maplock on EA to be freed from block map */ | |
659 | txEA(tid, ip, &JFS_IP(ip)->ea, NULL); | |
660 | ||
661 | /* | |
662 | * free ACL | |
663 | */ | |
664 | if (JFS_IP(ip)->acl.flag & DXD_EXTENT) | |
665 | /* acquire maplock on EA to be freed from block map */ | |
666 | txEA(tid, ip, &JFS_IP(ip)->acl, NULL); | |
667 | ||
668 | /* | |
669 | * free xtree/data (truncate to zero length): | |
63f83c9f | 670 | * free xtree/data pages from cache if COMMIT_PWMAP, |
1da177e4 LT |
671 | * free xtree/data blocks from persistent block map, and |
672 | * free xtree/data blocks from working block map if COMMIT_PWMAP; | |
673 | */ | |
674 | if (ip->i_size) | |
675 | return xtTruncate_pmap(tid, ip, 0); | |
676 | ||
677 | return 0; | |
678 | } | |
679 | ||
680 | ||
681 | /* | |
1868f4aa | 682 | * NAME: jfs_free_zero_link() |
1da177e4 | 683 | * |
f720e3ba | 684 | * FUNCTION: for non-directory, called by iClose(), |
63f83c9f | 685 | * free resources of a file from cache and WORKING map |
1da177e4 LT |
686 | * for a file previously committed with zero link count |
687 | * while associated with a pager object, | |
688 | * | |
689 | * PARAMETER: ip - pointer to inode of file. | |
1da177e4 | 690 | */ |
1868f4aa | 691 | void jfs_free_zero_link(struct inode *ip) |
1da177e4 | 692 | { |
1da177e4 LT |
693 | int type; |
694 | ||
1868f4aa | 695 | jfs_info("jfs_free_zero_link: ip = 0x%p", ip); |
1da177e4 LT |
696 | |
697 | /* return if not reg or symbolic link or if size is | |
698 | * already ok. | |
699 | */ | |
700 | type = ip->i_mode & S_IFMT; | |
701 | ||
702 | switch (type) { | |
703 | case S_IFREG: | |
704 | break; | |
705 | case S_IFLNK: | |
706 | /* if its contained in inode nothing to do */ | |
707 | if (ip->i_size < IDATASIZE) | |
1868f4aa | 708 | return; |
1da177e4 LT |
709 | break; |
710 | default: | |
1868f4aa | 711 | return; |
1da177e4 LT |
712 | } |
713 | ||
714 | /* | |
715 | * free EA | |
716 | */ | |
717 | if (JFS_IP(ip)->ea.flag & DXD_EXTENT) { | |
718 | s64 xaddr = addressDXD(&JFS_IP(ip)->ea); | |
719 | int xlen = lengthDXD(&JFS_IP(ip)->ea); | |
720 | struct maplock maplock; /* maplock for COMMIT_WMAP */ | |
721 | struct pxd_lock *pxdlock; /* maplock for COMMIT_WMAP */ | |
722 | ||
723 | /* free EA pages from cache */ | |
724 | invalidate_dxd_metapages(ip, JFS_IP(ip)->ea); | |
725 | ||
726 | /* free EA extent from working block map */ | |
727 | maplock.index = 1; | |
728 | pxdlock = (struct pxd_lock *) & maplock; | |
729 | pxdlock->flag = mlckFREEPXD; | |
730 | PXDaddress(&pxdlock->pxd, xaddr); | |
731 | PXDlength(&pxdlock->pxd, xlen); | |
732 | txFreeMap(ip, pxdlock, NULL, COMMIT_WMAP); | |
733 | } | |
734 | ||
735 | /* | |
736 | * free ACL | |
737 | */ | |
738 | if (JFS_IP(ip)->acl.flag & DXD_EXTENT) { | |
739 | s64 xaddr = addressDXD(&JFS_IP(ip)->acl); | |
740 | int xlen = lengthDXD(&JFS_IP(ip)->acl); | |
741 | struct maplock maplock; /* maplock for COMMIT_WMAP */ | |
742 | struct pxd_lock *pxdlock; /* maplock for COMMIT_WMAP */ | |
743 | ||
744 | invalidate_dxd_metapages(ip, JFS_IP(ip)->acl); | |
745 | ||
746 | /* free ACL extent from working block map */ | |
747 | maplock.index = 1; | |
748 | pxdlock = (struct pxd_lock *) & maplock; | |
749 | pxdlock->flag = mlckFREEPXD; | |
750 | PXDaddress(&pxdlock->pxd, xaddr); | |
751 | PXDlength(&pxdlock->pxd, xlen); | |
752 | txFreeMap(ip, pxdlock, NULL, COMMIT_WMAP); | |
753 | } | |
754 | ||
755 | /* | |
756 | * free xtree/data (truncate to zero length): | |
757 | * free xtree/data pages from cache, and | |
758 | * free xtree/data blocks from working block map; | |
759 | */ | |
760 | if (ip->i_size) | |
1868f4aa | 761 | xtTruncate(0, ip, 0, COMMIT_WMAP); |
1da177e4 LT |
762 | } |
763 | ||
764 | /* | |
765 | * NAME: jfs_link(vp, dvp, name, crp) | |
766 | * | |
767 | * FUNCTION: create a link to <vp> by the name = <name> | |
768 | * in the parent directory <dvp> | |
769 | * | |
63f83c9f | 770 | * PARAMETER: vp - target object |
1da177e4 LT |
771 | * dvp - parent directory of new link |
772 | * name - name of new link to target object | |
773 | * crp - credential | |
774 | * | |
775 | * RETURN: Errors from subroutines | |
776 | * | |
777 | * note: | |
778 | * JFS does NOT support link() on directories (to prevent circular | |
779 | * path in the directory hierarchy); | |
780 | * EPERM: the target object is a directory, and either the caller | |
781 | * does not have appropriate privileges or the implementation prohibits | |
782 | * using link() on directories [XPG4.2]. | |
783 | * | |
784 | * JFS does NOT support links between file systems: | |
785 | * EXDEV: target object and new link are on different file systems and | |
786 | * implementation does not support links between file systems [XPG4.2]. | |
787 | */ | |
788 | static int jfs_link(struct dentry *old_dentry, | |
789 | struct inode *dir, struct dentry *dentry) | |
790 | { | |
791 | int rc; | |
792 | tid_t tid; | |
793 | struct inode *ip = old_dentry->d_inode; | |
794 | ino_t ino; | |
795 | struct component_name dname; | |
796 | struct btstack btstack; | |
797 | struct inode *iplist[2]; | |
798 | ||
799 | jfs_info("jfs_link: %s %s", old_dentry->d_name.name, | |
800 | dentry->d_name.name); | |
801 | ||
802 | if (ip->i_nlink == JFS_LINK_MAX) | |
803 | return -EMLINK; | |
804 | ||
805 | if (ip->i_nlink == 0) | |
806 | return -ENOENT; | |
807 | ||
808 | tid = txBegin(ip->i_sb, 0); | |
809 | ||
82d5b9a7 DK |
810 | mutex_lock_nested(&JFS_IP(dir)->commit_mutex, COMMIT_MUTEX_PARENT); |
811 | mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); | |
1da177e4 LT |
812 | |
813 | /* | |
814 | * scan parent directory for entry/freespace | |
815 | */ | |
816 | if ((rc = get_UCSname(&dname, dentry))) | |
817 | goto out; | |
818 | ||
819 | if ((rc = dtSearch(dir, &dname, &ino, &btstack, JFS_CREATE))) | |
820 | goto free_dname; | |
821 | ||
822 | /* | |
823 | * create entry for new link in parent directory | |
824 | */ | |
825 | ino = ip->i_ino; | |
826 | if ((rc = dtInsert(tid, dir, &dname, &ino, &btstack))) | |
827 | goto free_dname; | |
828 | ||
829 | /* update object inode */ | |
d8c76e6f | 830 | inc_nlink(ip); /* for new link */ |
1da177e4 | 831 | ip->i_ctime = CURRENT_TIME; |
988a6490 | 832 | dir->i_ctime = dir->i_mtime = CURRENT_TIME; |
1da177e4 LT |
833 | mark_inode_dirty(dir); |
834 | atomic_inc(&ip->i_count); | |
835 | ||
836 | iplist[0] = ip; | |
837 | iplist[1] = dir; | |
838 | rc = txCommit(tid, 2, &iplist[0], 0); | |
839 | ||
840 | if (rc) { | |
9a53c3a7 | 841 | ip->i_nlink--; /* never instantiated */ |
1da177e4 LT |
842 | iput(ip); |
843 | } else | |
844 | d_instantiate(dentry, ip); | |
845 | ||
846 | free_dname: | |
847 | free_UCSname(&dname); | |
848 | ||
849 | out: | |
850 | txEnd(tid); | |
851 | ||
1de87444 | 852 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 853 | mutex_unlock(&JFS_IP(dir)->commit_mutex); |
1da177e4 LT |
854 | |
855 | jfs_info("jfs_link: rc:%d", rc); | |
856 | return rc; | |
857 | } | |
858 | ||
859 | /* | |
860 | * NAME: jfs_symlink(dip, dentry, name) | |
861 | * | |
862 | * FUNCTION: creates a symbolic link to <symlink> by name <name> | |
f720e3ba | 863 | * in directory <dip> |
1da177e4 | 864 | * |
f720e3ba DK |
865 | * PARAMETER: dip - parent directory vnode |
866 | * dentry - dentry of symbolic link | |
867 | * name - the path name of the existing object | |
868 | * that will be the source of the link | |
1da177e4 LT |
869 | * |
870 | * RETURN: errors from subroutines | |
871 | * | |
872 | * note: | |
873 | * ENAMETOOLONG: pathname resolution of a symbolic link produced | |
874 | * an intermediate result whose length exceeds PATH_MAX [XPG4.2] | |
875 | */ | |
876 | ||
877 | static int jfs_symlink(struct inode *dip, struct dentry *dentry, | |
878 | const char *name) | |
879 | { | |
880 | int rc; | |
881 | tid_t tid; | |
882 | ino_t ino = 0; | |
883 | struct component_name dname; | |
884 | int ssize; /* source pathname size */ | |
885 | struct btstack btstack; | |
886 | struct inode *ip = dentry->d_inode; | |
887 | unchar *i_fastsymlink; | |
888 | s64 xlen = 0; | |
889 | int bmask = 0, xsize; | |
890 | s64 extent = 0, xaddr; | |
891 | struct metapage *mp; | |
892 | struct super_block *sb; | |
893 | struct tblock *tblk; | |
894 | ||
895 | struct inode *iplist[2]; | |
896 | ||
897 | jfs_info("jfs_symlink: dip:0x%p name:%s", dip, name); | |
898 | ||
899 | ssize = strlen(name) + 1; | |
900 | ||
901 | /* | |
902 | * search parent directory for entry/freespace | |
903 | * (dtSearch() returns parent directory page pinned) | |
904 | */ | |
905 | ||
906 | if ((rc = get_UCSname(&dname, dentry))) | |
907 | goto out1; | |
908 | ||
909 | /* | |
910 | * allocate on-disk/in-memory inode for symbolic link: | |
911 | * (iAlloc() returns new, locked inode) | |
912 | */ | |
913 | ip = ialloc(dip, S_IFLNK | 0777); | |
087387f9 AM |
914 | if (IS_ERR(ip)) { |
915 | rc = PTR_ERR(ip); | |
1da177e4 LT |
916 | goto out2; |
917 | } | |
918 | ||
919 | tid = txBegin(dip->i_sb, 0); | |
920 | ||
82d5b9a7 DK |
921 | mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); |
922 | mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); | |
1da177e4 | 923 | |
1d15b10f DK |
924 | rc = jfs_init_security(tid, ip, dip); |
925 | if (rc) | |
926 | goto out3; | |
927 | ||
1da177e4 LT |
928 | tblk = tid_to_tblock(tid); |
929 | tblk->xflag |= COMMIT_CREATE; | |
930 | tblk->ino = ip->i_ino; | |
931 | tblk->u.ixpxd = JFS_IP(ip)->ixpxd; | |
932 | ||
933 | /* fix symlink access permission | |
63f83c9f | 934 | * (dir_create() ANDs in the u.u_cmask, |
1da177e4 LT |
935 | * but symlinks really need to be 777 access) |
936 | */ | |
937 | ip->i_mode |= 0777; | |
938 | ||
939 | /* | |
940 | * write symbolic link target path name | |
941 | */ | |
942 | xtInitRoot(tid, ip); | |
943 | ||
944 | /* | |
945 | * write source path name inline in on-disk inode (fast symbolic link) | |
946 | */ | |
947 | ||
948 | if (ssize <= IDATASIZE) { | |
949 | ip->i_op = &jfs_symlink_inode_operations; | |
950 | ||
951 | i_fastsymlink = JFS_IP(ip)->i_inline; | |
952 | memcpy(i_fastsymlink, name, ssize); | |
953 | ip->i_size = ssize - 1; | |
954 | ||
955 | /* | |
956 | * if symlink is > 128 bytes, we don't have the space to | |
957 | * store inline extended attributes | |
958 | */ | |
959 | if (ssize > sizeof (JFS_IP(ip)->i_inline)) | |
960 | JFS_IP(ip)->mode2 &= ~INLINEEA; | |
961 | ||
962 | jfs_info("jfs_symlink: fast symlink added ssize:%d name:%s ", | |
963 | ssize, name); | |
964 | } | |
965 | /* | |
966 | * write source path name in a single extent | |
967 | */ | |
968 | else { | |
969 | jfs_info("jfs_symlink: allocate extent ip:0x%p", ip); | |
970 | ||
971 | ip->i_op = &page_symlink_inode_operations; | |
972 | ip->i_mapping->a_ops = &jfs_aops; | |
973 | ||
974 | /* | |
63f83c9f | 975 | * even though the data of symlink object (source |
1da177e4 LT |
976 | * path name) is treated as non-journaled user data, |
977 | * it is read/written thru buffer cache for performance. | |
978 | */ | |
979 | sb = ip->i_sb; | |
980 | bmask = JFS_SBI(sb)->bsize - 1; | |
981 | xsize = (ssize + bmask) & ~bmask; | |
982 | xaddr = 0; | |
983 | xlen = xsize >> JFS_SBI(sb)->l2bsize; | |
984 | if ((rc = xtInsert(tid, ip, 0, 0, xlen, &xaddr, 0))) { | |
985 | txAbort(tid, 0); | |
1da177e4 LT |
986 | goto out3; |
987 | } | |
988 | extent = xaddr; | |
989 | ip->i_size = ssize - 1; | |
990 | while (ssize) { | |
991 | /* This is kind of silly since PATH_MAX == 4K */ | |
992 | int copy_size = min(ssize, PSIZE); | |
993 | ||
994 | mp = get_metapage(ip, xaddr, PSIZE, 1); | |
995 | ||
996 | if (mp == NULL) { | |
997 | xtTruncate(tid, ip, 0, COMMIT_PWMAP); | |
998 | rc = -EIO; | |
999 | txAbort(tid, 0); | |
1000 | goto out3; | |
1001 | } | |
1002 | memcpy(mp->data, name, copy_size); | |
1003 | flush_metapage(mp); | |
1004 | ssize -= copy_size; | |
1005 | name += copy_size; | |
1006 | xaddr += JFS_SBI(sb)->nbperpage; | |
1007 | } | |
1008 | } | |
1009 | ||
1010 | /* | |
1011 | * create entry for symbolic link in parent directory | |
1012 | */ | |
1013 | rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE); | |
1014 | if (rc == 0) { | |
1015 | ino = ip->i_ino; | |
1016 | rc = dtInsert(tid, dip, &dname, &ino, &btstack); | |
1017 | } | |
1018 | if (rc) { | |
1019 | if (xlen) | |
1020 | xtTruncate(tid, ip, 0, COMMIT_PWMAP); | |
1021 | txAbort(tid, 0); | |
1022 | /* discard new inode */ | |
1023 | goto out3; | |
1024 | } | |
1025 | ||
1da177e4 LT |
1026 | mark_inode_dirty(ip); |
1027 | ||
988a6490 DK |
1028 | dip->i_ctime = dip->i_mtime = CURRENT_TIME; |
1029 | mark_inode_dirty(dip); | |
1da177e4 LT |
1030 | /* |
1031 | * commit update of parent directory and link object | |
1032 | */ | |
1033 | ||
1034 | iplist[0] = dip; | |
1035 | iplist[1] = ip; | |
1036 | rc = txCommit(tid, 2, &iplist[0], 0); | |
1037 | ||
1038 | out3: | |
1039 | txEnd(tid); | |
1de87444 | 1040 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 1041 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 | 1042 | if (rc) { |
4f4b401b | 1043 | free_ea_wmap(ip); |
1da177e4 | 1044 | ip->i_nlink = 0; |
1f3403fa | 1045 | unlock_new_inode(ip); |
1da177e4 | 1046 | iput(ip); |
1f3403fa | 1047 | } else { |
1da177e4 | 1048 | d_instantiate(dentry, ip); |
1f3403fa DK |
1049 | unlock_new_inode(ip); |
1050 | } | |
1da177e4 LT |
1051 | |
1052 | out2: | |
1053 | free_UCSname(&dname); | |
1054 | ||
1da177e4 LT |
1055 | out1: |
1056 | jfs_info("jfs_symlink: rc:%d", rc); | |
1057 | return rc; | |
1058 | } | |
1059 | ||
1060 | ||
1061 | /* | |
f720e3ba | 1062 | * NAME: jfs_rename |
1da177e4 | 1063 | * |
f720e3ba | 1064 | * FUNCTION: rename a file or directory |
1da177e4 LT |
1065 | */ |
1066 | static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
1067 | struct inode *new_dir, struct dentry *new_dentry) | |
1068 | { | |
1069 | struct btstack btstack; | |
1070 | ino_t ino; | |
1071 | struct component_name new_dname; | |
1072 | struct inode *new_ip; | |
1073 | struct component_name old_dname; | |
1074 | struct inode *old_ip; | |
1075 | int rc; | |
1076 | tid_t tid; | |
1077 | struct tlock *tlck; | |
1078 | struct dt_lock *dtlck; | |
1079 | struct lv *lv; | |
1080 | int ipcount; | |
1081 | struct inode *iplist[4]; | |
1082 | struct tblock *tblk; | |
1083 | s64 new_size = 0; | |
1084 | int commit_flag; | |
1085 | ||
1086 | ||
1087 | jfs_info("jfs_rename: %s %s", old_dentry->d_name.name, | |
1088 | new_dentry->d_name.name); | |
1089 | ||
1090 | old_ip = old_dentry->d_inode; | |
1091 | new_ip = new_dentry->d_inode; | |
1092 | ||
1093 | if ((rc = get_UCSname(&old_dname, old_dentry))) | |
1094 | goto out1; | |
1095 | ||
1096 | if ((rc = get_UCSname(&new_dname, new_dentry))) | |
1097 | goto out2; | |
1098 | ||
1099 | /* | |
1100 | * Make sure source inode number is what we think it is | |
1101 | */ | |
1102 | rc = dtSearch(old_dir, &old_dname, &ino, &btstack, JFS_LOOKUP); | |
1103 | if (rc || (ino != old_ip->i_ino)) { | |
1104 | rc = -ENOENT; | |
1105 | goto out3; | |
1106 | } | |
1107 | ||
1108 | /* | |
1109 | * Make sure dest inode number (if any) is what we think it is | |
1110 | */ | |
1111 | rc = dtSearch(new_dir, &new_dname, &ino, &btstack, JFS_LOOKUP); | |
09aaa749 | 1112 | if (!rc) { |
da8a41d1 | 1113 | if ((!new_ip) || (ino != new_ip->i_ino)) { |
1da177e4 LT |
1114 | rc = -ESTALE; |
1115 | goto out3; | |
1116 | } | |
1117 | } else if (rc != -ENOENT) | |
1118 | goto out3; | |
1119 | else if (new_ip) { | |
1120 | /* no entry exists, but one was expected */ | |
1121 | rc = -ESTALE; | |
1122 | goto out3; | |
1123 | } | |
1124 | ||
1125 | if (S_ISDIR(old_ip->i_mode)) { | |
1126 | if (new_ip) { | |
1127 | if (!dtEmpty(new_ip)) { | |
1128 | rc = -ENOTEMPTY; | |
1129 | goto out3; | |
1130 | } | |
1131 | } else if ((new_dir != old_dir) && | |
1132 | (new_dir->i_nlink == JFS_LINK_MAX)) { | |
1133 | rc = -EMLINK; | |
1134 | goto out3; | |
1135 | } | |
1136 | } else if (new_ip) { | |
82d5b9a7 | 1137 | IWRITE_LOCK(new_ip, RDWRLOCK_NORMAL); |
1da177e4 | 1138 | /* Init inode for quota operations. */ |
c94d2a22 | 1139 | vfs_dq_init(new_ip); |
1da177e4 LT |
1140 | } |
1141 | ||
1142 | /* | |
1143 | * The real work starts here | |
1144 | */ | |
1145 | tid = txBegin(new_dir->i_sb, 0); | |
1146 | ||
82d5b9a7 DK |
1147 | /* |
1148 | * How do we know the locking is safe from deadlocks? | |
1149 | * The vfs does the hard part for us. Any time we are taking nested | |
1150 | * commit_mutexes, the vfs already has i_mutex held on the parent. | |
1151 | * Here, the vfs has already taken i_mutex on both old_dir and new_dir. | |
1152 | */ | |
1153 | mutex_lock_nested(&JFS_IP(new_dir)->commit_mutex, COMMIT_MUTEX_PARENT); | |
1154 | mutex_lock_nested(&JFS_IP(old_ip)->commit_mutex, COMMIT_MUTEX_CHILD); | |
1da177e4 | 1155 | if (old_dir != new_dir) |
82d5b9a7 DK |
1156 | mutex_lock_nested(&JFS_IP(old_dir)->commit_mutex, |
1157 | COMMIT_MUTEX_SECOND_PARENT); | |
1da177e4 LT |
1158 | |
1159 | if (new_ip) { | |
82d5b9a7 DK |
1160 | mutex_lock_nested(&JFS_IP(new_ip)->commit_mutex, |
1161 | COMMIT_MUTEX_VICTIM); | |
1da177e4 LT |
1162 | /* |
1163 | * Change existing directory entry to new inode number | |
1164 | */ | |
1165 | ino = new_ip->i_ino; | |
1166 | rc = dtModify(tid, new_dir, &new_dname, &ino, | |
1167 | old_ip->i_ino, JFS_RENAME); | |
1168 | if (rc) | |
1169 | goto out4; | |
9a53c3a7 | 1170 | drop_nlink(new_ip); |
1da177e4 | 1171 | if (S_ISDIR(new_ip->i_mode)) { |
9a53c3a7 | 1172 | drop_nlink(new_ip); |
1da177e4 | 1173 | if (new_ip->i_nlink) { |
48ce8b05 | 1174 | mutex_unlock(&JFS_IP(new_ip)->commit_mutex); |
1da177e4 | 1175 | if (old_dir != new_dir) |
1de87444 | 1176 | mutex_unlock(&JFS_IP(old_dir)->commit_mutex); |
48ce8b05 ED |
1177 | mutex_unlock(&JFS_IP(old_ip)->commit_mutex); |
1178 | mutex_unlock(&JFS_IP(new_dir)->commit_mutex); | |
1da177e4 LT |
1179 | if (!S_ISDIR(old_ip->i_mode) && new_ip) |
1180 | IWRITE_UNLOCK(new_ip); | |
1181 | jfs_error(new_ip->i_sb, | |
1182 | "jfs_rename: new_ip->i_nlink != 0"); | |
1183 | return -EIO; | |
1184 | } | |
1185 | tblk = tid_to_tblock(tid); | |
1186 | tblk->xflag |= COMMIT_DELETE; | |
1187 | tblk->u.ip = new_ip; | |
1188 | } else if (new_ip->i_nlink == 0) { | |
1189 | assert(!test_cflag(COMMIT_Nolink, new_ip)); | |
1190 | /* free block resources */ | |
1191 | if ((new_size = commitZeroLink(tid, new_ip)) < 0) { | |
1192 | txAbort(tid, 1); /* Marks FS Dirty */ | |
63f83c9f | 1193 | rc = new_size; |
1da177e4 LT |
1194 | goto out4; |
1195 | } | |
1196 | tblk = tid_to_tblock(tid); | |
1197 | tblk->xflag |= COMMIT_DELETE; | |
1198 | tblk->u.ip = new_ip; | |
1199 | } else { | |
1200 | new_ip->i_ctime = CURRENT_TIME; | |
1201 | mark_inode_dirty(new_ip); | |
1202 | } | |
1203 | } else { | |
1204 | /* | |
1205 | * Add new directory entry | |
1206 | */ | |
1207 | rc = dtSearch(new_dir, &new_dname, &ino, &btstack, | |
1208 | JFS_CREATE); | |
1209 | if (rc) { | |
1210 | jfs_err("jfs_rename didn't expect dtSearch to fail " | |
1211 | "w/rc = %d", rc); | |
1212 | goto out4; | |
1213 | } | |
1214 | ||
1215 | ino = old_ip->i_ino; | |
1216 | rc = dtInsert(tid, new_dir, &new_dname, &ino, &btstack); | |
1217 | if (rc) { | |
1218 | if (rc == -EIO) | |
1219 | jfs_err("jfs_rename: dtInsert returned -EIO"); | |
1220 | goto out4; | |
1221 | } | |
1222 | if (S_ISDIR(old_ip->i_mode)) | |
d8c76e6f | 1223 | inc_nlink(new_dir); |
1da177e4 LT |
1224 | } |
1225 | /* | |
1226 | * Remove old directory entry | |
1227 | */ | |
1228 | ||
1229 | ino = old_ip->i_ino; | |
1230 | rc = dtDelete(tid, old_dir, &old_dname, &ino, JFS_REMOVE); | |
1231 | if (rc) { | |
1232 | jfs_err("jfs_rename did not expect dtDelete to return rc = %d", | |
1233 | rc); | |
1234 | txAbort(tid, 1); /* Marks Filesystem dirty */ | |
1235 | goto out4; | |
1236 | } | |
1237 | if (S_ISDIR(old_ip->i_mode)) { | |
9a53c3a7 | 1238 | drop_nlink(old_dir); |
1da177e4 LT |
1239 | if (old_dir != new_dir) { |
1240 | /* | |
1241 | * Change inode number of parent for moved directory | |
1242 | */ | |
1243 | ||
1244 | JFS_IP(old_ip)->i_dtroot.header.idotdot = | |
1245 | cpu_to_le32(new_dir->i_ino); | |
1246 | ||
1247 | /* Linelock header of dtree */ | |
1248 | tlck = txLock(tid, old_ip, | |
1249 | (struct metapage *) &JFS_IP(old_ip)->bxflag, | |
1250 | tlckDTREE | tlckBTROOT | tlckRELINK); | |
1251 | dtlck = (struct dt_lock *) & tlck->lock; | |
1252 | ASSERT(dtlck->index == 0); | |
1253 | lv = & dtlck->lv[0]; | |
1254 | lv->offset = 0; | |
1255 | lv->length = 1; | |
1256 | dtlck->index++; | |
1257 | } | |
1258 | } | |
1259 | ||
1260 | /* | |
1261 | * Update ctime on changed/moved inodes & mark dirty | |
1262 | */ | |
1263 | old_ip->i_ctime = CURRENT_TIME; | |
1264 | mark_inode_dirty(old_ip); | |
1265 | ||
1266 | new_dir->i_ctime = new_dir->i_mtime = current_fs_time(new_dir->i_sb); | |
1267 | mark_inode_dirty(new_dir); | |
1268 | ||
1269 | /* Build list of inodes modified by this transaction */ | |
1270 | ipcount = 0; | |
1271 | iplist[ipcount++] = old_ip; | |
1272 | if (new_ip) | |
1273 | iplist[ipcount++] = new_ip; | |
1274 | iplist[ipcount++] = old_dir; | |
1275 | ||
1276 | if (old_dir != new_dir) { | |
1277 | iplist[ipcount++] = new_dir; | |
1278 | old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME; | |
1279 | mark_inode_dirty(old_dir); | |
1280 | } | |
1281 | ||
1282 | /* | |
1283 | * Incomplete truncate of file data can | |
1284 | * result in timing problems unless we synchronously commit the | |
1285 | * transaction. | |
1286 | */ | |
1287 | if (new_size) | |
1288 | commit_flag = COMMIT_SYNC; | |
1289 | else | |
1290 | commit_flag = 0; | |
1291 | ||
1292 | rc = txCommit(tid, ipcount, iplist, commit_flag); | |
1293 | ||
1294 | out4: | |
1295 | txEnd(tid); | |
1da177e4 | 1296 | if (new_ip) |
1de87444 | 1297 | mutex_unlock(&JFS_IP(new_ip)->commit_mutex); |
48ce8b05 ED |
1298 | if (old_dir != new_dir) |
1299 | mutex_unlock(&JFS_IP(old_dir)->commit_mutex); | |
1300 | mutex_unlock(&JFS_IP(old_ip)->commit_mutex); | |
1301 | mutex_unlock(&JFS_IP(new_dir)->commit_mutex); | |
1da177e4 LT |
1302 | |
1303 | while (new_size && (rc == 0)) { | |
1304 | tid = txBegin(new_ip->i_sb, 0); | |
1de87444 | 1305 | mutex_lock(&JFS_IP(new_ip)->commit_mutex); |
1da177e4 LT |
1306 | new_size = xtTruncate_pmap(tid, new_ip, new_size); |
1307 | if (new_size < 0) { | |
1308 | txAbort(tid, 1); | |
63f83c9f | 1309 | rc = new_size; |
1da177e4 LT |
1310 | } else |
1311 | rc = txCommit(tid, 1, &new_ip, COMMIT_SYNC); | |
1312 | txEnd(tid); | |
1de87444 | 1313 | mutex_unlock(&JFS_IP(new_ip)->commit_mutex); |
1da177e4 LT |
1314 | } |
1315 | if (new_ip && (new_ip->i_nlink == 0)) | |
1316 | set_cflag(COMMIT_Nolink, new_ip); | |
1317 | out3: | |
1318 | free_UCSname(&new_dname); | |
1319 | out2: | |
1320 | free_UCSname(&old_dname); | |
1321 | out1: | |
1322 | if (new_ip && !S_ISDIR(new_ip->i_mode)) | |
1323 | IWRITE_UNLOCK(new_ip); | |
1324 | /* | |
1325 | * Truncating the directory index table is not guaranteed. It | |
1326 | * may need to be done iteratively | |
1327 | */ | |
1328 | if (test_cflag(COMMIT_Stale, old_dir)) { | |
1329 | if (old_dir->i_size > 1) | |
1330 | jfs_truncate_nolock(old_dir, 0); | |
1331 | ||
1332 | clear_cflag(COMMIT_Stale, old_dir); | |
1333 | } | |
1334 | ||
1335 | jfs_info("jfs_rename: returning %d", rc); | |
1336 | return rc; | |
1337 | } | |
1338 | ||
1339 | ||
1340 | /* | |
f720e3ba | 1341 | * NAME: jfs_mknod |
1da177e4 | 1342 | * |
f720e3ba | 1343 | * FUNCTION: Create a special file (device) |
1da177e4 LT |
1344 | */ |
1345 | static int jfs_mknod(struct inode *dir, struct dentry *dentry, | |
1346 | int mode, dev_t rdev) | |
1347 | { | |
1348 | struct jfs_inode_info *jfs_ip; | |
1349 | struct btstack btstack; | |
1350 | struct component_name dname; | |
1351 | ino_t ino; | |
1352 | struct inode *ip; | |
1353 | struct inode *iplist[2]; | |
1354 | int rc; | |
1355 | tid_t tid; | |
1356 | struct tblock *tblk; | |
1357 | ||
1358 | if (!new_valid_dev(rdev)) | |
1359 | return -EINVAL; | |
1360 | ||
1361 | jfs_info("jfs_mknod: %s", dentry->d_name.name); | |
1362 | ||
1363 | if ((rc = get_UCSname(&dname, dentry))) | |
1364 | goto out; | |
1365 | ||
1366 | ip = ialloc(dir, mode); | |
087387f9 AM |
1367 | if (IS_ERR(ip)) { |
1368 | rc = PTR_ERR(ip); | |
1da177e4 LT |
1369 | goto out1; |
1370 | } | |
1371 | jfs_ip = JFS_IP(ip); | |
1372 | ||
1373 | tid = txBegin(dir->i_sb, 0); | |
1374 | ||
82d5b9a7 DK |
1375 | mutex_lock_nested(&JFS_IP(dir)->commit_mutex, COMMIT_MUTEX_PARENT); |
1376 | mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); | |
1da177e4 | 1377 | |
4f4b401b DK |
1378 | rc = jfs_init_acl(tid, ip, dir); |
1379 | if (rc) | |
1da177e4 LT |
1380 | goto out3; |
1381 | ||
1d15b10f DK |
1382 | rc = jfs_init_security(tid, ip, dir); |
1383 | if (rc) { | |
1384 | txAbort(tid, 0); | |
1385 | goto out3; | |
1386 | } | |
1387 | ||
4f4b401b DK |
1388 | if ((rc = dtSearch(dir, &dname, &ino, &btstack, JFS_CREATE))) { |
1389 | txAbort(tid, 0); | |
1390 | goto out3; | |
1391 | } | |
1392 | ||
1da177e4 LT |
1393 | tblk = tid_to_tblock(tid); |
1394 | tblk->xflag |= COMMIT_CREATE; | |
1395 | tblk->ino = ip->i_ino; | |
1396 | tblk->u.ixpxd = JFS_IP(ip)->ixpxd; | |
1397 | ||
1398 | ino = ip->i_ino; | |
4f4b401b DK |
1399 | if ((rc = dtInsert(tid, dir, &dname, &ino, &btstack))) { |
1400 | txAbort(tid, 0); | |
1da177e4 | 1401 | goto out3; |
4f4b401b | 1402 | } |
1da177e4 LT |
1403 | |
1404 | ip->i_op = &jfs_file_inode_operations; | |
1405 | jfs_ip->dev = new_encode_dev(rdev); | |
1406 | init_special_inode(ip, ip->i_mode, rdev); | |
1407 | ||
1da177e4 LT |
1408 | mark_inode_dirty(ip); |
1409 | ||
1410 | dir->i_ctime = dir->i_mtime = CURRENT_TIME; | |
1411 | ||
1412 | mark_inode_dirty(dir); | |
1413 | ||
1414 | iplist[0] = dir; | |
1415 | iplist[1] = ip; | |
1416 | rc = txCommit(tid, 2, iplist, 0); | |
1417 | ||
1418 | out3: | |
1419 | txEnd(tid); | |
1de87444 IM |
1420 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
1421 | mutex_unlock(&JFS_IP(dir)->commit_mutex); | |
1da177e4 | 1422 | if (rc) { |
4f4b401b | 1423 | free_ea_wmap(ip); |
1da177e4 | 1424 | ip->i_nlink = 0; |
1f3403fa | 1425 | unlock_new_inode(ip); |
1da177e4 | 1426 | iput(ip); |
1f3403fa | 1427 | } else { |
1da177e4 | 1428 | d_instantiate(dentry, ip); |
1f3403fa DK |
1429 | unlock_new_inode(ip); |
1430 | } | |
1da177e4 LT |
1431 | |
1432 | out1: | |
1433 | free_UCSname(&dname); | |
1434 | ||
1da177e4 LT |
1435 | out: |
1436 | jfs_info("jfs_mknod: returning %d", rc); | |
1437 | return rc; | |
1438 | } | |
1439 | ||
1440 | static struct dentry *jfs_lookup(struct inode *dip, struct dentry *dentry, struct nameidata *nd) | |
1441 | { | |
1442 | struct btstack btstack; | |
1443 | ino_t inum; | |
1444 | struct inode *ip; | |
1445 | struct component_name key; | |
1446 | const char *name = dentry->d_name.name; | |
1447 | int len = dentry->d_name.len; | |
1448 | int rc; | |
1449 | ||
1450 | jfs_info("jfs_lookup: name = %s", name); | |
1451 | ||
686762c8 DK |
1452 | if (JFS_SBI(dip->i_sb)->mntflag & JFS_OS2) |
1453 | dentry->d_op = &jfs_ci_dentry_operations; | |
1da177e4 LT |
1454 | |
1455 | if ((name[0] == '.') && (len == 1)) | |
1456 | inum = dip->i_ino; | |
1457 | else if (strcmp(name, "..") == 0) | |
1458 | inum = PARENT(dip); | |
1459 | else { | |
1460 | if ((rc = get_UCSname(&key, dentry))) | |
1461 | return ERR_PTR(rc); | |
1462 | rc = dtSearch(dip, &key, &inum, &btstack, JFS_LOOKUP); | |
1463 | free_UCSname(&key); | |
1464 | if (rc == -ENOENT) { | |
1465 | d_add(dentry, NULL); | |
88f85a55 | 1466 | return NULL; |
1da177e4 LT |
1467 | } else if (rc) { |
1468 | jfs_err("jfs_lookup: dtSearch returned %d", rc); | |
1469 | return ERR_PTR(rc); | |
1470 | } | |
1471 | } | |
1472 | ||
eab1df71 DH |
1473 | ip = jfs_iget(dip->i_sb, inum); |
1474 | if (IS_ERR(ip)) { | |
1da177e4 | 1475 | jfs_err("jfs_lookup: iget failed on inum %d", (uint) inum); |
eab1df71 | 1476 | return ERR_CAST(ip); |
1da177e4 LT |
1477 | } |
1478 | ||
1da177e4 LT |
1479 | dentry = d_splice_alias(ip, dentry); |
1480 | ||
1481 | if (dentry && (JFS_SBI(dip->i_sb)->mntflag & JFS_OS2)) | |
1482 | dentry->d_op = &jfs_ci_dentry_operations; | |
1483 | ||
1484 | return dentry; | |
1485 | } | |
1486 | ||
d425de70 CH |
1487 | static struct inode *jfs_nfs_get_inode(struct super_block *sb, |
1488 | u64 ino, u32 generation) | |
5ca29607 | 1489 | { |
5ca29607 | 1490 | struct inode *inode; |
5ca29607 CH |
1491 | |
1492 | if (ino == 0) | |
1493 | return ERR_PTR(-ESTALE); | |
eab1df71 DH |
1494 | inode = jfs_iget(sb, ino); |
1495 | if (IS_ERR(inode)) | |
1496 | return ERR_CAST(inode); | |
5ca29607 | 1497 | |
eab1df71 | 1498 | if (generation && inode->i_generation != generation) { |
d425de70 CH |
1499 | iput(inode); |
1500 | return ERR_PTR(-ESTALE); | |
5ca29607 CH |
1501 | } |
1502 | ||
d425de70 CH |
1503 | return inode; |
1504 | } | |
5ca29607 | 1505 | |
d425de70 CH |
1506 | struct dentry *jfs_fh_to_dentry(struct super_block *sb, struct fid *fid, |
1507 | int fh_len, int fh_type) | |
1508 | { | |
1509 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
1510 | jfs_nfs_get_inode); | |
1511 | } | |
1512 | ||
1513 | struct dentry *jfs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
1514 | int fh_len, int fh_type) | |
1515 | { | |
1516 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
1517 | jfs_nfs_get_inode); | |
5ca29607 CH |
1518 | } |
1519 | ||
1da177e4 LT |
1520 | struct dentry *jfs_get_parent(struct dentry *dentry) |
1521 | { | |
1da177e4 LT |
1522 | unsigned long parent_ino; |
1523 | ||
1524 | parent_ino = | |
1525 | le32_to_cpu(JFS_IP(dentry->d_inode)->i_dtroot.header.idotdot); | |
1da177e4 | 1526 | |
44003728 | 1527 | return d_obtain_alias(jfs_iget(dentry->d_inode->i_sb, parent_ino)); |
1da177e4 LT |
1528 | } |
1529 | ||
92e1d5be | 1530 | const struct inode_operations jfs_dir_inode_operations = { |
1da177e4 LT |
1531 | .create = jfs_create, |
1532 | .lookup = jfs_lookup, | |
1533 | .link = jfs_link, | |
1534 | .unlink = jfs_unlink, | |
1535 | .symlink = jfs_symlink, | |
1536 | .mkdir = jfs_mkdir, | |
1537 | .rmdir = jfs_rmdir, | |
1538 | .mknod = jfs_mknod, | |
1539 | .rename = jfs_rename, | |
1540 | .setxattr = jfs_setxattr, | |
1541 | .getxattr = jfs_getxattr, | |
1542 | .listxattr = jfs_listxattr, | |
1543 | .removexattr = jfs_removexattr, | |
1544 | #ifdef CONFIG_JFS_POSIX_ACL | |
1545 | .setattr = jfs_setattr, | |
1546 | .permission = jfs_permission, | |
1547 | #endif | |
1548 | }; | |
1549 | ||
4b6f5d20 | 1550 | const struct file_operations jfs_dir_operations = { |
1da177e4 LT |
1551 | .read = generic_read_dir, |
1552 | .readdir = jfs_readdir, | |
1553 | .fsync = jfs_fsync, | |
baab81fa | 1554 | .unlocked_ioctl = jfs_ioctl, |
ef1fc2f0 AK |
1555 | #ifdef CONFIG_COMPAT |
1556 | .compat_ioctl = jfs_compat_ioctl, | |
1557 | #endif | |
3222a3e5 | 1558 | .llseek = generic_file_llseek, |
1da177e4 LT |
1559 | }; |
1560 | ||
1561 | static int jfs_ci_hash(struct dentry *dir, struct qstr *this) | |
1562 | { | |
1563 | unsigned long hash; | |
1564 | int i; | |
1565 | ||
1566 | hash = init_name_hash(); | |
1567 | for (i=0; i < this->len; i++) | |
1568 | hash = partial_name_hash(tolower(this->name[i]), hash); | |
1569 | this->hash = end_name_hash(hash); | |
1570 | ||
1571 | return 0; | |
1572 | } | |
1573 | ||
1574 | static int jfs_ci_compare(struct dentry *dir, struct qstr *a, struct qstr *b) | |
1575 | { | |
1576 | int i, result = 1; | |
1577 | ||
1578 | if (a->len != b->len) | |
1579 | goto out; | |
1580 | for (i=0; i < a->len; i++) { | |
1581 | if (tolower(a->name[i]) != tolower(b->name[i])) | |
1582 | goto out; | |
1583 | } | |
1584 | result = 0; | |
1585 | ||
1586 | /* | |
1587 | * We want creates to preserve case. A negative dentry, a, that | |
1588 | * has a different case than b may cause a new entry to be created | |
1589 | * with the wrong case. Since we can't tell if a comes from a negative | |
1590 | * dentry, we blindly replace it with b. This should be harmless if | |
1591 | * a is not a negative dentry. | |
1592 | */ | |
1593 | memcpy((unsigned char *)a->name, b->name, a->len); | |
1594 | out: | |
1595 | return result; | |
1596 | } | |
1597 | ||
ad28b4ef | 1598 | const struct dentry_operations jfs_ci_dentry_operations = |
1da177e4 LT |
1599 | { |
1600 | .d_hash = jfs_ci_hash, | |
1601 | .d_compare = jfs_ci_compare, | |
1602 | }; |