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 | */ | |
1da177e4 LT |
38 | struct dentry_operations jfs_ci_dentry_operations; |
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 | ||
158 | insert_inode_hash(ip); | |
159 | mark_inode_dirty(ip); | |
160 | ||
161 | dip->i_ctime = dip->i_mtime = CURRENT_TIME; | |
162 | ||
163 | mark_inode_dirty(dip); | |
164 | ||
165 | rc = txCommit(tid, 2, &iplist[0], 0); | |
166 | ||
167 | out3: | |
168 | txEnd(tid); | |
1de87444 | 169 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 170 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 | 171 | if (rc) { |
4f4b401b | 172 | free_ea_wmap(ip); |
1da177e4 LT |
173 | ip->i_nlink = 0; |
174 | iput(ip); | |
175 | } else | |
176 | d_instantiate(dentry, ip); | |
177 | ||
178 | out2: | |
179 | free_UCSname(&dname); | |
180 | ||
1da177e4 LT |
181 | out1: |
182 | ||
183 | jfs_info("jfs_create: rc:%d", rc); | |
184 | return rc; | |
185 | } | |
186 | ||
187 | ||
188 | /* | |
189 | * NAME: jfs_mkdir(dip, dentry, mode) | |
190 | * | |
191 | * FUNCTION: create a child directory in the parent directory <dip> | |
192 | * with name = <from dentry> and mode = <mode> | |
193 | * | |
63f83c9f | 194 | * PARAMETER: dip - parent directory vnode |
1da177e4 LT |
195 | * dentry - dentry of child directory |
196 | * mode - create mode (rwxrwxrwx). | |
197 | * | |
198 | * RETURN: Errors from subroutines | |
199 | * | |
200 | * note: | |
201 | * EACCESS: user needs search+write permission on the parent directory | |
202 | */ | |
203 | static int jfs_mkdir(struct inode *dip, struct dentry *dentry, int mode) | |
204 | { | |
205 | int rc = 0; | |
206 | tid_t tid; /* transaction id */ | |
207 | struct inode *ip = NULL; /* child directory inode */ | |
208 | ino_t ino; | |
209 | struct component_name dname; /* child directory name */ | |
210 | struct btstack btstack; | |
211 | struct inode *iplist[2]; | |
212 | struct tblock *tblk; | |
213 | ||
214 | jfs_info("jfs_mkdir: dip:0x%p name:%s", dip, dentry->d_name.name); | |
215 | ||
216 | /* link count overflow on parent directory ? */ | |
217 | if (dip->i_nlink == JFS_LINK_MAX) { | |
218 | rc = -EMLINK; | |
219 | goto out1; | |
220 | } | |
221 | ||
222 | /* | |
223 | * search parent directory for entry/freespace | |
224 | * (dtSearch() returns parent directory page pinned) | |
225 | */ | |
226 | if ((rc = get_UCSname(&dname, dentry))) | |
227 | goto out1; | |
228 | ||
229 | /* | |
230 | * Either iAlloc() or txBegin() may block. Deadlock can occur if we | |
231 | * block there while holding dtree page, so we allocate the inode & | |
232 | * begin the transaction before we search the directory. | |
233 | */ | |
234 | ip = ialloc(dip, S_IFDIR | mode); | |
087387f9 AM |
235 | if (IS_ERR(ip)) { |
236 | rc = PTR_ERR(ip); | |
1da177e4 LT |
237 | goto out2; |
238 | } | |
239 | ||
240 | tid = txBegin(dip->i_sb, 0); | |
241 | ||
82d5b9a7 DK |
242 | mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); |
243 | mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); | |
1da177e4 | 244 | |
4f4b401b DK |
245 | rc = jfs_init_acl(tid, ip, dip); |
246 | if (rc) | |
247 | goto out3; | |
248 | ||
1d15b10f DK |
249 | rc = jfs_init_security(tid, ip, dip); |
250 | if (rc) { | |
251 | txAbort(tid, 0); | |
252 | goto out3; | |
253 | } | |
254 | ||
1da177e4 LT |
255 | if ((rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE))) { |
256 | jfs_err("jfs_mkdir: dtSearch returned %d", rc); | |
4f4b401b | 257 | txAbort(tid, 0); |
1da177e4 LT |
258 | goto out3; |
259 | } | |
260 | ||
261 | tblk = tid_to_tblock(tid); | |
262 | tblk->xflag |= COMMIT_CREATE; | |
263 | tblk->ino = ip->i_ino; | |
264 | tblk->u.ixpxd = JFS_IP(ip)->ixpxd; | |
265 | ||
266 | iplist[0] = dip; | |
267 | iplist[1] = ip; | |
268 | ||
269 | /* | |
270 | * initialize the child directory in-line in inode | |
271 | */ | |
272 | dtInitRoot(tid, ip, dip->i_ino); | |
273 | ||
274 | /* | |
275 | * create entry in parent directory for child directory | |
276 | * (dtInsert() releases parent directory page) | |
277 | */ | |
278 | ino = ip->i_ino; | |
279 | if ((rc = dtInsert(tid, dip, &dname, &ino, &btstack))) { | |
280 | if (rc == -EIO) { | |
281 | jfs_err("jfs_mkdir: dtInsert returned -EIO"); | |
282 | txAbort(tid, 1); /* Marks Filesystem dirty */ | |
283 | } else | |
284 | txAbort(tid, 0); /* Filesystem full */ | |
285 | goto out3; | |
286 | } | |
287 | ||
288 | ip->i_nlink = 2; /* for '.' */ | |
289 | ip->i_op = &jfs_dir_inode_operations; | |
290 | ip->i_fop = &jfs_dir_operations; | |
291 | ||
292 | insert_inode_hash(ip); | |
293 | mark_inode_dirty(ip); | |
294 | ||
295 | /* update parent directory inode */ | |
d8c76e6f | 296 | inc_nlink(dip); /* for '..' from child directory */ |
1da177e4 LT |
297 | dip->i_ctime = dip->i_mtime = CURRENT_TIME; |
298 | mark_inode_dirty(dip); | |
299 | ||
300 | rc = txCommit(tid, 2, &iplist[0], 0); | |
301 | ||
302 | out3: | |
303 | txEnd(tid); | |
1de87444 | 304 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 305 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 | 306 | if (rc) { |
4f4b401b | 307 | free_ea_wmap(ip); |
1da177e4 LT |
308 | ip->i_nlink = 0; |
309 | iput(ip); | |
310 | } else | |
311 | d_instantiate(dentry, ip); | |
312 | ||
313 | out2: | |
314 | free_UCSname(&dname); | |
315 | ||
1da177e4 LT |
316 | |
317 | out1: | |
318 | ||
319 | jfs_info("jfs_mkdir: rc:%d", rc); | |
320 | return rc; | |
321 | } | |
322 | ||
323 | /* | |
324 | * NAME: jfs_rmdir(dip, dentry) | |
325 | * | |
326 | * FUNCTION: remove a link to child directory | |
327 | * | |
63f83c9f | 328 | * PARAMETER: dip - parent inode |
1da177e4 LT |
329 | * dentry - child directory dentry |
330 | * | |
331 | * RETURN: -EINVAL - if name is . or .. | |
f720e3ba | 332 | * -EINVAL - if . or .. exist but are invalid. |
1da177e4 LT |
333 | * errors from subroutines |
334 | * | |
335 | * note: | |
63f83c9f DK |
336 | * if other threads have the directory open when the last link |
337 | * is removed, the "." and ".." entries, if present, are removed before | |
338 | * rmdir() returns and no new entries may be created in the directory, | |
339 | * but the directory is not removed until the last reference to | |
1da177e4 LT |
340 | * the directory is released (cf.unlink() of regular file). |
341 | */ | |
342 | static int jfs_rmdir(struct inode *dip, struct dentry *dentry) | |
343 | { | |
344 | int rc; | |
345 | tid_t tid; /* transaction id */ | |
346 | struct inode *ip = dentry->d_inode; | |
347 | ino_t ino; | |
348 | struct component_name dname; | |
349 | struct inode *iplist[2]; | |
350 | struct tblock *tblk; | |
351 | ||
352 | jfs_info("jfs_rmdir: dip:0x%p name:%s", dip, dentry->d_name.name); | |
353 | ||
354 | /* Init inode for quota operations. */ | |
355 | DQUOT_INIT(ip); | |
356 | ||
357 | /* directory must be empty to be removed */ | |
358 | if (!dtEmpty(ip)) { | |
359 | rc = -ENOTEMPTY; | |
360 | goto out; | |
361 | } | |
362 | ||
363 | if ((rc = get_UCSname(&dname, dentry))) { | |
364 | goto out; | |
365 | } | |
366 | ||
367 | tid = txBegin(dip->i_sb, 0); | |
368 | ||
82d5b9a7 DK |
369 | mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); |
370 | mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); | |
1da177e4 LT |
371 | |
372 | iplist[0] = dip; | |
373 | iplist[1] = ip; | |
374 | ||
375 | tblk = tid_to_tblock(tid); | |
376 | tblk->xflag |= COMMIT_DELETE; | |
377 | tblk->u.ip = ip; | |
378 | ||
379 | /* | |
380 | * delete the entry of target directory from parent directory | |
381 | */ | |
382 | ino = ip->i_ino; | |
383 | if ((rc = dtDelete(tid, dip, &dname, &ino, JFS_REMOVE))) { | |
384 | jfs_err("jfs_rmdir: dtDelete returned %d", rc); | |
385 | if (rc == -EIO) | |
386 | txAbort(tid, 1); | |
387 | txEnd(tid); | |
1de87444 | 388 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 389 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 LT |
390 | |
391 | goto out2; | |
392 | } | |
393 | ||
394 | /* update parent directory's link count corresponding | |
395 | * to ".." entry of the target directory deleted | |
396 | */ | |
1da177e4 | 397 | dip->i_ctime = dip->i_mtime = CURRENT_TIME; |
9a53c3a7 | 398 | inode_dec_link_count(dip); |
1da177e4 LT |
399 | |
400 | /* | |
401 | * OS/2 could have created EA and/or ACL | |
402 | */ | |
403 | /* free EA from both persistent and working map */ | |
404 | if (JFS_IP(ip)->ea.flag & DXD_EXTENT) { | |
405 | /* free EA pages */ | |
406 | txEA(tid, ip, &JFS_IP(ip)->ea, NULL); | |
407 | } | |
408 | JFS_IP(ip)->ea.flag = 0; | |
409 | ||
410 | /* free ACL from both persistent and working map */ | |
411 | if (JFS_IP(ip)->acl.flag & DXD_EXTENT) { | |
412 | /* free ACL pages */ | |
413 | txEA(tid, ip, &JFS_IP(ip)->acl, NULL); | |
414 | } | |
415 | JFS_IP(ip)->acl.flag = 0; | |
416 | ||
417 | /* mark the target directory as deleted */ | |
ce71ec36 | 418 | clear_nlink(ip); |
1da177e4 LT |
419 | mark_inode_dirty(ip); |
420 | ||
421 | rc = txCommit(tid, 2, &iplist[0], 0); | |
422 | ||
423 | txEnd(tid); | |
424 | ||
1de87444 | 425 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 426 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 LT |
427 | |
428 | /* | |
429 | * Truncating the directory index table is not guaranteed. It | |
430 | * may need to be done iteratively | |
431 | */ | |
432 | if (test_cflag(COMMIT_Stale, dip)) { | |
433 | if (dip->i_size > 1) | |
434 | jfs_truncate_nolock(dip, 0); | |
435 | ||
436 | clear_cflag(COMMIT_Stale, dip); | |
437 | } | |
438 | ||
439 | out2: | |
440 | free_UCSname(&dname); | |
441 | ||
442 | out: | |
443 | jfs_info("jfs_rmdir: rc:%d", rc); | |
444 | return rc; | |
445 | } | |
446 | ||
447 | /* | |
448 | * NAME: jfs_unlink(dip, dentry) | |
449 | * | |
63f83c9f | 450 | * FUNCTION: remove a link to object <vp> named by <name> |
1da177e4 LT |
451 | * from parent directory <dvp> |
452 | * | |
63f83c9f DK |
453 | * PARAMETER: dip - inode of parent directory |
454 | * dentry - dentry of object to be removed | |
1da177e4 LT |
455 | * |
456 | * RETURN: errors from subroutines | |
457 | * | |
458 | * note: | |
459 | * temporary file: if one or more processes have the file open | |
460 | * when the last link is removed, the link will be removed before | |
461 | * unlink() returns, but the removal of the file contents will be | |
462 | * postponed until all references to the files are closed. | |
463 | * | |
464 | * JFS does NOT support unlink() on directories. | |
465 | * | |
466 | */ | |
467 | static int jfs_unlink(struct inode *dip, struct dentry *dentry) | |
468 | { | |
469 | int rc; | |
470 | tid_t tid; /* transaction id */ | |
471 | struct inode *ip = dentry->d_inode; | |
472 | ino_t ino; | |
473 | struct component_name dname; /* object name */ | |
474 | struct inode *iplist[2]; | |
475 | struct tblock *tblk; | |
476 | s64 new_size = 0; | |
477 | int commit_flag; | |
478 | ||
479 | jfs_info("jfs_unlink: dip:0x%p name:%s", dip, dentry->d_name.name); | |
480 | ||
481 | /* Init inode for quota operations. */ | |
482 | DQUOT_INIT(ip); | |
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 | ||
514 | ip->i_ctime = dip->i_ctime = dip->i_mtime = CURRENT_TIME; | |
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; | |
789 | struct inode *ip = old_dentry->d_inode; | |
790 | ino_t ino; | |
791 | struct component_name dname; | |
792 | struct btstack btstack; | |
793 | struct inode *iplist[2]; | |
794 | ||
795 | jfs_info("jfs_link: %s %s", old_dentry->d_name.name, | |
796 | dentry->d_name.name); | |
797 | ||
798 | if (ip->i_nlink == JFS_LINK_MAX) | |
799 | return -EMLINK; | |
800 | ||
801 | if (ip->i_nlink == 0) | |
802 | return -ENOENT; | |
803 | ||
804 | tid = txBegin(ip->i_sb, 0); | |
805 | ||
82d5b9a7 DK |
806 | mutex_lock_nested(&JFS_IP(dir)->commit_mutex, COMMIT_MUTEX_PARENT); |
807 | mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); | |
1da177e4 LT |
808 | |
809 | /* | |
810 | * scan parent directory for entry/freespace | |
811 | */ | |
812 | if ((rc = get_UCSname(&dname, dentry))) | |
813 | goto out; | |
814 | ||
815 | if ((rc = dtSearch(dir, &dname, &ino, &btstack, JFS_CREATE))) | |
816 | goto free_dname; | |
817 | ||
818 | /* | |
819 | * create entry for new link in parent directory | |
820 | */ | |
821 | ino = ip->i_ino; | |
822 | if ((rc = dtInsert(tid, dir, &dname, &ino, &btstack))) | |
823 | goto free_dname; | |
824 | ||
825 | /* update object inode */ | |
d8c76e6f | 826 | inc_nlink(ip); /* for new link */ |
1da177e4 | 827 | ip->i_ctime = CURRENT_TIME; |
988a6490 | 828 | dir->i_ctime = dir->i_mtime = CURRENT_TIME; |
1da177e4 LT |
829 | mark_inode_dirty(dir); |
830 | atomic_inc(&ip->i_count); | |
831 | ||
832 | iplist[0] = ip; | |
833 | iplist[1] = dir; | |
834 | rc = txCommit(tid, 2, &iplist[0], 0); | |
835 | ||
836 | if (rc) { | |
9a53c3a7 | 837 | ip->i_nlink--; /* never instantiated */ |
1da177e4 LT |
838 | iput(ip); |
839 | } else | |
840 | d_instantiate(dentry, ip); | |
841 | ||
842 | free_dname: | |
843 | free_UCSname(&dname); | |
844 | ||
845 | out: | |
846 | txEnd(tid); | |
847 | ||
1de87444 | 848 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 849 | mutex_unlock(&JFS_IP(dir)->commit_mutex); |
1da177e4 LT |
850 | |
851 | jfs_info("jfs_link: rc:%d", rc); | |
852 | return rc; | |
853 | } | |
854 | ||
855 | /* | |
856 | * NAME: jfs_symlink(dip, dentry, name) | |
857 | * | |
858 | * FUNCTION: creates a symbolic link to <symlink> by name <name> | |
f720e3ba | 859 | * in directory <dip> |
1da177e4 | 860 | * |
f720e3ba DK |
861 | * PARAMETER: dip - parent directory vnode |
862 | * dentry - dentry of symbolic link | |
863 | * name - the path name of the existing object | |
864 | * that will be the source of the link | |
1da177e4 LT |
865 | * |
866 | * RETURN: errors from subroutines | |
867 | * | |
868 | * note: | |
869 | * ENAMETOOLONG: pathname resolution of a symbolic link produced | |
870 | * an intermediate result whose length exceeds PATH_MAX [XPG4.2] | |
871 | */ | |
872 | ||
873 | static int jfs_symlink(struct inode *dip, struct dentry *dentry, | |
874 | const char *name) | |
875 | { | |
876 | int rc; | |
877 | tid_t tid; | |
878 | ino_t ino = 0; | |
879 | struct component_name dname; | |
880 | int ssize; /* source pathname size */ | |
881 | struct btstack btstack; | |
882 | struct inode *ip = dentry->d_inode; | |
883 | unchar *i_fastsymlink; | |
884 | s64 xlen = 0; | |
885 | int bmask = 0, xsize; | |
886 | s64 extent = 0, xaddr; | |
887 | struct metapage *mp; | |
888 | struct super_block *sb; | |
889 | struct tblock *tblk; | |
890 | ||
891 | struct inode *iplist[2]; | |
892 | ||
893 | jfs_info("jfs_symlink: dip:0x%p name:%s", dip, name); | |
894 | ||
895 | ssize = strlen(name) + 1; | |
896 | ||
897 | /* | |
898 | * search parent directory for entry/freespace | |
899 | * (dtSearch() returns parent directory page pinned) | |
900 | */ | |
901 | ||
902 | if ((rc = get_UCSname(&dname, dentry))) | |
903 | goto out1; | |
904 | ||
905 | /* | |
906 | * allocate on-disk/in-memory inode for symbolic link: | |
907 | * (iAlloc() returns new, locked inode) | |
908 | */ | |
909 | ip = ialloc(dip, S_IFLNK | 0777); | |
087387f9 AM |
910 | if (IS_ERR(ip)) { |
911 | rc = PTR_ERR(ip); | |
1da177e4 LT |
912 | goto out2; |
913 | } | |
914 | ||
915 | tid = txBegin(dip->i_sb, 0); | |
916 | ||
82d5b9a7 DK |
917 | mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); |
918 | mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); | |
1da177e4 | 919 | |
1d15b10f DK |
920 | rc = jfs_init_security(tid, ip, dip); |
921 | if (rc) | |
922 | goto out3; | |
923 | ||
1da177e4 LT |
924 | tblk = tid_to_tblock(tid); |
925 | tblk->xflag |= COMMIT_CREATE; | |
926 | tblk->ino = ip->i_ino; | |
927 | tblk->u.ixpxd = JFS_IP(ip)->ixpxd; | |
928 | ||
929 | /* fix symlink access permission | |
63f83c9f | 930 | * (dir_create() ANDs in the u.u_cmask, |
1da177e4 LT |
931 | * but symlinks really need to be 777 access) |
932 | */ | |
933 | ip->i_mode |= 0777; | |
934 | ||
935 | /* | |
936 | * write symbolic link target path name | |
937 | */ | |
938 | xtInitRoot(tid, ip); | |
939 | ||
940 | /* | |
941 | * write source path name inline in on-disk inode (fast symbolic link) | |
942 | */ | |
943 | ||
944 | if (ssize <= IDATASIZE) { | |
945 | ip->i_op = &jfs_symlink_inode_operations; | |
946 | ||
947 | i_fastsymlink = JFS_IP(ip)->i_inline; | |
948 | memcpy(i_fastsymlink, name, ssize); | |
949 | ip->i_size = ssize - 1; | |
950 | ||
951 | /* | |
952 | * if symlink is > 128 bytes, we don't have the space to | |
953 | * store inline extended attributes | |
954 | */ | |
955 | if (ssize > sizeof (JFS_IP(ip)->i_inline)) | |
956 | JFS_IP(ip)->mode2 &= ~INLINEEA; | |
957 | ||
958 | jfs_info("jfs_symlink: fast symlink added ssize:%d name:%s ", | |
959 | ssize, name); | |
960 | } | |
961 | /* | |
962 | * write source path name in a single extent | |
963 | */ | |
964 | else { | |
965 | jfs_info("jfs_symlink: allocate extent ip:0x%p", ip); | |
966 | ||
967 | ip->i_op = &page_symlink_inode_operations; | |
968 | ip->i_mapping->a_ops = &jfs_aops; | |
969 | ||
970 | /* | |
63f83c9f | 971 | * even though the data of symlink object (source |
1da177e4 LT |
972 | * path name) is treated as non-journaled user data, |
973 | * it is read/written thru buffer cache for performance. | |
974 | */ | |
975 | sb = ip->i_sb; | |
976 | bmask = JFS_SBI(sb)->bsize - 1; | |
977 | xsize = (ssize + bmask) & ~bmask; | |
978 | xaddr = 0; | |
979 | xlen = xsize >> JFS_SBI(sb)->l2bsize; | |
980 | if ((rc = xtInsert(tid, ip, 0, 0, xlen, &xaddr, 0))) { | |
981 | txAbort(tid, 0); | |
1da177e4 LT |
982 | goto out3; |
983 | } | |
984 | extent = xaddr; | |
985 | ip->i_size = ssize - 1; | |
986 | while (ssize) { | |
987 | /* This is kind of silly since PATH_MAX == 4K */ | |
988 | int copy_size = min(ssize, PSIZE); | |
989 | ||
990 | mp = get_metapage(ip, xaddr, PSIZE, 1); | |
991 | ||
992 | if (mp == NULL) { | |
993 | xtTruncate(tid, ip, 0, COMMIT_PWMAP); | |
994 | rc = -EIO; | |
995 | txAbort(tid, 0); | |
996 | goto out3; | |
997 | } | |
998 | memcpy(mp->data, name, copy_size); | |
999 | flush_metapage(mp); | |
1000 | ssize -= copy_size; | |
1001 | name += copy_size; | |
1002 | xaddr += JFS_SBI(sb)->nbperpage; | |
1003 | } | |
1004 | } | |
1005 | ||
1006 | /* | |
1007 | * create entry for symbolic link in parent directory | |
1008 | */ | |
1009 | rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE); | |
1010 | if (rc == 0) { | |
1011 | ino = ip->i_ino; | |
1012 | rc = dtInsert(tid, dip, &dname, &ino, &btstack); | |
1013 | } | |
1014 | if (rc) { | |
1015 | if (xlen) | |
1016 | xtTruncate(tid, ip, 0, COMMIT_PWMAP); | |
1017 | txAbort(tid, 0); | |
1018 | /* discard new inode */ | |
1019 | goto out3; | |
1020 | } | |
1021 | ||
1022 | insert_inode_hash(ip); | |
1023 | mark_inode_dirty(ip); | |
1024 | ||
988a6490 DK |
1025 | dip->i_ctime = dip->i_mtime = CURRENT_TIME; |
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); |
1da177e4 LT |
1041 | ip->i_nlink = 0; |
1042 | iput(ip); | |
1043 | } else | |
1044 | d_instantiate(dentry, ip); | |
1045 | ||
1046 | out2: | |
1047 | free_UCSname(&dname); | |
1048 | ||
1da177e4 LT |
1049 | out1: |
1050 | jfs_info("jfs_symlink: rc:%d", rc); | |
1051 | return rc; | |
1052 | } | |
1053 | ||
1054 | ||
1055 | /* | |
f720e3ba | 1056 | * NAME: jfs_rename |
1da177e4 | 1057 | * |
f720e3ba | 1058 | * FUNCTION: rename a file or directory |
1da177e4 LT |
1059 | */ |
1060 | static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
1061 | struct inode *new_dir, struct dentry *new_dentry) | |
1062 | { | |
1063 | struct btstack btstack; | |
1064 | ino_t ino; | |
1065 | struct component_name new_dname; | |
1066 | struct inode *new_ip; | |
1067 | struct component_name old_dname; | |
1068 | struct inode *old_ip; | |
1069 | int rc; | |
1070 | tid_t tid; | |
1071 | struct tlock *tlck; | |
1072 | struct dt_lock *dtlck; | |
1073 | struct lv *lv; | |
1074 | int ipcount; | |
1075 | struct inode *iplist[4]; | |
1076 | struct tblock *tblk; | |
1077 | s64 new_size = 0; | |
1078 | int commit_flag; | |
1079 | ||
1080 | ||
1081 | jfs_info("jfs_rename: %s %s", old_dentry->d_name.name, | |
1082 | new_dentry->d_name.name); | |
1083 | ||
1084 | old_ip = old_dentry->d_inode; | |
1085 | new_ip = new_dentry->d_inode; | |
1086 | ||
1087 | if ((rc = get_UCSname(&old_dname, old_dentry))) | |
1088 | goto out1; | |
1089 | ||
1090 | if ((rc = get_UCSname(&new_dname, new_dentry))) | |
1091 | goto out2; | |
1092 | ||
1093 | /* | |
1094 | * Make sure source inode number is what we think it is | |
1095 | */ | |
1096 | rc = dtSearch(old_dir, &old_dname, &ino, &btstack, JFS_LOOKUP); | |
1097 | if (rc || (ino != old_ip->i_ino)) { | |
1098 | rc = -ENOENT; | |
1099 | goto out3; | |
1100 | } | |
1101 | ||
1102 | /* | |
1103 | * Make sure dest inode number (if any) is what we think it is | |
1104 | */ | |
1105 | rc = dtSearch(new_dir, &new_dname, &ino, &btstack, JFS_LOOKUP); | |
09aaa749 | 1106 | if (!rc) { |
da8a41d1 | 1107 | if ((!new_ip) || (ino != new_ip->i_ino)) { |
1da177e4 LT |
1108 | rc = -ESTALE; |
1109 | goto out3; | |
1110 | } | |
1111 | } else if (rc != -ENOENT) | |
1112 | goto out3; | |
1113 | else if (new_ip) { | |
1114 | /* no entry exists, but one was expected */ | |
1115 | rc = -ESTALE; | |
1116 | goto out3; | |
1117 | } | |
1118 | ||
1119 | if (S_ISDIR(old_ip->i_mode)) { | |
1120 | if (new_ip) { | |
1121 | if (!dtEmpty(new_ip)) { | |
1122 | rc = -ENOTEMPTY; | |
1123 | goto out3; | |
1124 | } | |
1125 | } else if ((new_dir != old_dir) && | |
1126 | (new_dir->i_nlink == JFS_LINK_MAX)) { | |
1127 | rc = -EMLINK; | |
1128 | goto out3; | |
1129 | } | |
1130 | } else if (new_ip) { | |
82d5b9a7 | 1131 | IWRITE_LOCK(new_ip, RDWRLOCK_NORMAL); |
1da177e4 LT |
1132 | /* Init inode for quota operations. */ |
1133 | DQUOT_INIT(new_ip); | |
1134 | } | |
1135 | ||
1136 | /* | |
1137 | * The real work starts here | |
1138 | */ | |
1139 | tid = txBegin(new_dir->i_sb, 0); | |
1140 | ||
82d5b9a7 DK |
1141 | /* |
1142 | * How do we know the locking is safe from deadlocks? | |
1143 | * The vfs does the hard part for us. Any time we are taking nested | |
1144 | * commit_mutexes, the vfs already has i_mutex held on the parent. | |
1145 | * Here, the vfs has already taken i_mutex on both old_dir and new_dir. | |
1146 | */ | |
1147 | mutex_lock_nested(&JFS_IP(new_dir)->commit_mutex, COMMIT_MUTEX_PARENT); | |
1148 | mutex_lock_nested(&JFS_IP(old_ip)->commit_mutex, COMMIT_MUTEX_CHILD); | |
1da177e4 | 1149 | if (old_dir != new_dir) |
82d5b9a7 DK |
1150 | mutex_lock_nested(&JFS_IP(old_dir)->commit_mutex, |
1151 | COMMIT_MUTEX_SECOND_PARENT); | |
1da177e4 LT |
1152 | |
1153 | if (new_ip) { | |
82d5b9a7 DK |
1154 | mutex_lock_nested(&JFS_IP(new_ip)->commit_mutex, |
1155 | COMMIT_MUTEX_VICTIM); | |
1da177e4 LT |
1156 | /* |
1157 | * Change existing directory entry to new inode number | |
1158 | */ | |
1159 | ino = new_ip->i_ino; | |
1160 | rc = dtModify(tid, new_dir, &new_dname, &ino, | |
1161 | old_ip->i_ino, JFS_RENAME); | |
1162 | if (rc) | |
1163 | goto out4; | |
9a53c3a7 | 1164 | drop_nlink(new_ip); |
1da177e4 | 1165 | if (S_ISDIR(new_ip->i_mode)) { |
9a53c3a7 | 1166 | drop_nlink(new_ip); |
1da177e4 | 1167 | if (new_ip->i_nlink) { |
48ce8b05 | 1168 | mutex_unlock(&JFS_IP(new_ip)->commit_mutex); |
1da177e4 | 1169 | if (old_dir != new_dir) |
1de87444 | 1170 | mutex_unlock(&JFS_IP(old_dir)->commit_mutex); |
48ce8b05 ED |
1171 | mutex_unlock(&JFS_IP(old_ip)->commit_mutex); |
1172 | mutex_unlock(&JFS_IP(new_dir)->commit_mutex); | |
1da177e4 LT |
1173 | if (!S_ISDIR(old_ip->i_mode) && new_ip) |
1174 | IWRITE_UNLOCK(new_ip); | |
1175 | jfs_error(new_ip->i_sb, | |
1176 | "jfs_rename: new_ip->i_nlink != 0"); | |
1177 | return -EIO; | |
1178 | } | |
1179 | tblk = tid_to_tblock(tid); | |
1180 | tblk->xflag |= COMMIT_DELETE; | |
1181 | tblk->u.ip = new_ip; | |
1182 | } else if (new_ip->i_nlink == 0) { | |
1183 | assert(!test_cflag(COMMIT_Nolink, new_ip)); | |
1184 | /* free block resources */ | |
1185 | if ((new_size = commitZeroLink(tid, new_ip)) < 0) { | |
1186 | txAbort(tid, 1); /* Marks FS Dirty */ | |
63f83c9f | 1187 | rc = new_size; |
1da177e4 LT |
1188 | goto out4; |
1189 | } | |
1190 | tblk = tid_to_tblock(tid); | |
1191 | tblk->xflag |= COMMIT_DELETE; | |
1192 | tblk->u.ip = new_ip; | |
1193 | } else { | |
1194 | new_ip->i_ctime = CURRENT_TIME; | |
1195 | mark_inode_dirty(new_ip); | |
1196 | } | |
1197 | } else { | |
1198 | /* | |
1199 | * Add new directory entry | |
1200 | */ | |
1201 | rc = dtSearch(new_dir, &new_dname, &ino, &btstack, | |
1202 | JFS_CREATE); | |
1203 | if (rc) { | |
1204 | jfs_err("jfs_rename didn't expect dtSearch to fail " | |
1205 | "w/rc = %d", rc); | |
1206 | goto out4; | |
1207 | } | |
1208 | ||
1209 | ino = old_ip->i_ino; | |
1210 | rc = dtInsert(tid, new_dir, &new_dname, &ino, &btstack); | |
1211 | if (rc) { | |
1212 | if (rc == -EIO) | |
1213 | jfs_err("jfs_rename: dtInsert returned -EIO"); | |
1214 | goto out4; | |
1215 | } | |
1216 | if (S_ISDIR(old_ip->i_mode)) | |
d8c76e6f | 1217 | inc_nlink(new_dir); |
1da177e4 LT |
1218 | } |
1219 | /* | |
1220 | * Remove old directory entry | |
1221 | */ | |
1222 | ||
1223 | ino = old_ip->i_ino; | |
1224 | rc = dtDelete(tid, old_dir, &old_dname, &ino, JFS_REMOVE); | |
1225 | if (rc) { | |
1226 | jfs_err("jfs_rename did not expect dtDelete to return rc = %d", | |
1227 | rc); | |
1228 | txAbort(tid, 1); /* Marks Filesystem dirty */ | |
1229 | goto out4; | |
1230 | } | |
1231 | if (S_ISDIR(old_ip->i_mode)) { | |
9a53c3a7 | 1232 | drop_nlink(old_dir); |
1da177e4 LT |
1233 | if (old_dir != new_dir) { |
1234 | /* | |
1235 | * Change inode number of parent for moved directory | |
1236 | */ | |
1237 | ||
1238 | JFS_IP(old_ip)->i_dtroot.header.idotdot = | |
1239 | cpu_to_le32(new_dir->i_ino); | |
1240 | ||
1241 | /* Linelock header of dtree */ | |
1242 | tlck = txLock(tid, old_ip, | |
1243 | (struct metapage *) &JFS_IP(old_ip)->bxflag, | |
1244 | tlckDTREE | tlckBTROOT | tlckRELINK); | |
1245 | dtlck = (struct dt_lock *) & tlck->lock; | |
1246 | ASSERT(dtlck->index == 0); | |
1247 | lv = & dtlck->lv[0]; | |
1248 | lv->offset = 0; | |
1249 | lv->length = 1; | |
1250 | dtlck->index++; | |
1251 | } | |
1252 | } | |
1253 | ||
1254 | /* | |
1255 | * Update ctime on changed/moved inodes & mark dirty | |
1256 | */ | |
1257 | old_ip->i_ctime = CURRENT_TIME; | |
1258 | mark_inode_dirty(old_ip); | |
1259 | ||
1260 | new_dir->i_ctime = new_dir->i_mtime = current_fs_time(new_dir->i_sb); | |
1261 | mark_inode_dirty(new_dir); | |
1262 | ||
1263 | /* Build list of inodes modified by this transaction */ | |
1264 | ipcount = 0; | |
1265 | iplist[ipcount++] = old_ip; | |
1266 | if (new_ip) | |
1267 | iplist[ipcount++] = new_ip; | |
1268 | iplist[ipcount++] = old_dir; | |
1269 | ||
1270 | if (old_dir != new_dir) { | |
1271 | iplist[ipcount++] = new_dir; | |
1272 | old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME; | |
1273 | mark_inode_dirty(old_dir); | |
1274 | } | |
1275 | ||
1276 | /* | |
1277 | * Incomplete truncate of file data can | |
1278 | * result in timing problems unless we synchronously commit the | |
1279 | * transaction. | |
1280 | */ | |
1281 | if (new_size) | |
1282 | commit_flag = COMMIT_SYNC; | |
1283 | else | |
1284 | commit_flag = 0; | |
1285 | ||
1286 | rc = txCommit(tid, ipcount, iplist, commit_flag); | |
1287 | ||
1288 | out4: | |
1289 | txEnd(tid); | |
1da177e4 | 1290 | if (new_ip) |
1de87444 | 1291 | mutex_unlock(&JFS_IP(new_ip)->commit_mutex); |
48ce8b05 ED |
1292 | if (old_dir != new_dir) |
1293 | mutex_unlock(&JFS_IP(old_dir)->commit_mutex); | |
1294 | mutex_unlock(&JFS_IP(old_ip)->commit_mutex); | |
1295 | mutex_unlock(&JFS_IP(new_dir)->commit_mutex); | |
1da177e4 LT |
1296 | |
1297 | while (new_size && (rc == 0)) { | |
1298 | tid = txBegin(new_ip->i_sb, 0); | |
1de87444 | 1299 | mutex_lock(&JFS_IP(new_ip)->commit_mutex); |
1da177e4 LT |
1300 | new_size = xtTruncate_pmap(tid, new_ip, new_size); |
1301 | if (new_size < 0) { | |
1302 | txAbort(tid, 1); | |
63f83c9f | 1303 | rc = new_size; |
1da177e4 LT |
1304 | } else |
1305 | rc = txCommit(tid, 1, &new_ip, COMMIT_SYNC); | |
1306 | txEnd(tid); | |
1de87444 | 1307 | mutex_unlock(&JFS_IP(new_ip)->commit_mutex); |
1da177e4 LT |
1308 | } |
1309 | if (new_ip && (new_ip->i_nlink == 0)) | |
1310 | set_cflag(COMMIT_Nolink, new_ip); | |
1311 | out3: | |
1312 | free_UCSname(&new_dname); | |
1313 | out2: | |
1314 | free_UCSname(&old_dname); | |
1315 | out1: | |
1316 | if (new_ip && !S_ISDIR(new_ip->i_mode)) | |
1317 | IWRITE_UNLOCK(new_ip); | |
1318 | /* | |
1319 | * Truncating the directory index table is not guaranteed. It | |
1320 | * may need to be done iteratively | |
1321 | */ | |
1322 | if (test_cflag(COMMIT_Stale, old_dir)) { | |
1323 | if (old_dir->i_size > 1) | |
1324 | jfs_truncate_nolock(old_dir, 0); | |
1325 | ||
1326 | clear_cflag(COMMIT_Stale, old_dir); | |
1327 | } | |
1328 | ||
1329 | jfs_info("jfs_rename: returning %d", rc); | |
1330 | return rc; | |
1331 | } | |
1332 | ||
1333 | ||
1334 | /* | |
f720e3ba | 1335 | * NAME: jfs_mknod |
1da177e4 | 1336 | * |
f720e3ba | 1337 | * FUNCTION: Create a special file (device) |
1da177e4 LT |
1338 | */ |
1339 | static int jfs_mknod(struct inode *dir, struct dentry *dentry, | |
1340 | int mode, dev_t rdev) | |
1341 | { | |
1342 | struct jfs_inode_info *jfs_ip; | |
1343 | struct btstack btstack; | |
1344 | struct component_name dname; | |
1345 | ino_t ino; | |
1346 | struct inode *ip; | |
1347 | struct inode *iplist[2]; | |
1348 | int rc; | |
1349 | tid_t tid; | |
1350 | struct tblock *tblk; | |
1351 | ||
1352 | if (!new_valid_dev(rdev)) | |
1353 | return -EINVAL; | |
1354 | ||
1355 | jfs_info("jfs_mknod: %s", dentry->d_name.name); | |
1356 | ||
1357 | if ((rc = get_UCSname(&dname, dentry))) | |
1358 | goto out; | |
1359 | ||
1360 | ip = ialloc(dir, mode); | |
087387f9 AM |
1361 | if (IS_ERR(ip)) { |
1362 | rc = PTR_ERR(ip); | |
1da177e4 LT |
1363 | goto out1; |
1364 | } | |
1365 | jfs_ip = JFS_IP(ip); | |
1366 | ||
1367 | tid = txBegin(dir->i_sb, 0); | |
1368 | ||
82d5b9a7 DK |
1369 | mutex_lock_nested(&JFS_IP(dir)->commit_mutex, COMMIT_MUTEX_PARENT); |
1370 | mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); | |
1da177e4 | 1371 | |
4f4b401b DK |
1372 | rc = jfs_init_acl(tid, ip, dir); |
1373 | if (rc) | |
1da177e4 LT |
1374 | goto out3; |
1375 | ||
1d15b10f DK |
1376 | rc = jfs_init_security(tid, ip, dir); |
1377 | if (rc) { | |
1378 | txAbort(tid, 0); | |
1379 | goto out3; | |
1380 | } | |
1381 | ||
4f4b401b DK |
1382 | if ((rc = dtSearch(dir, &dname, &ino, &btstack, JFS_CREATE))) { |
1383 | txAbort(tid, 0); | |
1384 | goto out3; | |
1385 | } | |
1386 | ||
1da177e4 LT |
1387 | tblk = tid_to_tblock(tid); |
1388 | tblk->xflag |= COMMIT_CREATE; | |
1389 | tblk->ino = ip->i_ino; | |
1390 | tblk->u.ixpxd = JFS_IP(ip)->ixpxd; | |
1391 | ||
1392 | ino = ip->i_ino; | |
4f4b401b DK |
1393 | if ((rc = dtInsert(tid, dir, &dname, &ino, &btstack))) { |
1394 | txAbort(tid, 0); | |
1da177e4 | 1395 | goto out3; |
4f4b401b | 1396 | } |
1da177e4 LT |
1397 | |
1398 | ip->i_op = &jfs_file_inode_operations; | |
1399 | jfs_ip->dev = new_encode_dev(rdev); | |
1400 | init_special_inode(ip, ip->i_mode, rdev); | |
1401 | ||
1402 | insert_inode_hash(ip); | |
1403 | mark_inode_dirty(ip); | |
1404 | ||
1405 | dir->i_ctime = dir->i_mtime = CURRENT_TIME; | |
1406 | ||
1407 | mark_inode_dirty(dir); | |
1408 | ||
1409 | iplist[0] = dir; | |
1410 | iplist[1] = ip; | |
1411 | rc = txCommit(tid, 2, iplist, 0); | |
1412 | ||
1413 | out3: | |
1414 | txEnd(tid); | |
1de87444 IM |
1415 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
1416 | mutex_unlock(&JFS_IP(dir)->commit_mutex); | |
1da177e4 | 1417 | if (rc) { |
4f4b401b | 1418 | free_ea_wmap(ip); |
1da177e4 LT |
1419 | ip->i_nlink = 0; |
1420 | iput(ip); | |
1421 | } else | |
1422 | d_instantiate(dentry, ip); | |
1423 | ||
1424 | out1: | |
1425 | free_UCSname(&dname); | |
1426 | ||
1da177e4 LT |
1427 | out: |
1428 | jfs_info("jfs_mknod: returning %d", rc); | |
1429 | return rc; | |
1430 | } | |
1431 | ||
1432 | static struct dentry *jfs_lookup(struct inode *dip, struct dentry *dentry, struct nameidata *nd) | |
1433 | { | |
1434 | struct btstack btstack; | |
1435 | ino_t inum; | |
1436 | struct inode *ip; | |
1437 | struct component_name key; | |
1438 | const char *name = dentry->d_name.name; | |
1439 | int len = dentry->d_name.len; | |
1440 | int rc; | |
1441 | ||
1442 | jfs_info("jfs_lookup: name = %s", name); | |
1443 | ||
686762c8 DK |
1444 | if (JFS_SBI(dip->i_sb)->mntflag & JFS_OS2) |
1445 | dentry->d_op = &jfs_ci_dentry_operations; | |
1da177e4 LT |
1446 | |
1447 | if ((name[0] == '.') && (len == 1)) | |
1448 | inum = dip->i_ino; | |
1449 | else if (strcmp(name, "..") == 0) | |
1450 | inum = PARENT(dip); | |
1451 | else { | |
1452 | if ((rc = get_UCSname(&key, dentry))) | |
1453 | return ERR_PTR(rc); | |
1454 | rc = dtSearch(dip, &key, &inum, &btstack, JFS_LOOKUP); | |
1455 | free_UCSname(&key); | |
1456 | if (rc == -ENOENT) { | |
1457 | d_add(dentry, NULL); | |
88f85a55 | 1458 | return NULL; |
1da177e4 LT |
1459 | } else if (rc) { |
1460 | jfs_err("jfs_lookup: dtSearch returned %d", rc); | |
1461 | return ERR_PTR(rc); | |
1462 | } | |
1463 | } | |
1464 | ||
eab1df71 DH |
1465 | ip = jfs_iget(dip->i_sb, inum); |
1466 | if (IS_ERR(ip)) { | |
1da177e4 | 1467 | jfs_err("jfs_lookup: iget failed on inum %d", (uint) inum); |
eab1df71 | 1468 | return ERR_CAST(ip); |
1da177e4 LT |
1469 | } |
1470 | ||
1da177e4 LT |
1471 | dentry = d_splice_alias(ip, dentry); |
1472 | ||
1473 | if (dentry && (JFS_SBI(dip->i_sb)->mntflag & JFS_OS2)) | |
1474 | dentry->d_op = &jfs_ci_dentry_operations; | |
1475 | ||
1476 | return dentry; | |
1477 | } | |
1478 | ||
d425de70 CH |
1479 | static struct inode *jfs_nfs_get_inode(struct super_block *sb, |
1480 | u64 ino, u32 generation) | |
5ca29607 | 1481 | { |
5ca29607 | 1482 | struct inode *inode; |
5ca29607 CH |
1483 | |
1484 | if (ino == 0) | |
1485 | return ERR_PTR(-ESTALE); | |
eab1df71 DH |
1486 | inode = jfs_iget(sb, ino); |
1487 | if (IS_ERR(inode)) | |
1488 | return ERR_CAST(inode); | |
5ca29607 | 1489 | |
eab1df71 | 1490 | if (generation && inode->i_generation != generation) { |
d425de70 CH |
1491 | iput(inode); |
1492 | return ERR_PTR(-ESTALE); | |
5ca29607 CH |
1493 | } |
1494 | ||
d425de70 CH |
1495 | return inode; |
1496 | } | |
5ca29607 | 1497 | |
d425de70 CH |
1498 | struct dentry *jfs_fh_to_dentry(struct super_block *sb, struct fid *fid, |
1499 | int fh_len, int fh_type) | |
1500 | { | |
1501 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
1502 | jfs_nfs_get_inode); | |
1503 | } | |
1504 | ||
1505 | struct dentry *jfs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
1506 | int fh_len, int fh_type) | |
1507 | { | |
1508 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
1509 | jfs_nfs_get_inode); | |
5ca29607 CH |
1510 | } |
1511 | ||
1da177e4 LT |
1512 | struct dentry *jfs_get_parent(struct dentry *dentry) |
1513 | { | |
1da177e4 LT |
1514 | unsigned long parent_ino; |
1515 | ||
1516 | parent_ino = | |
1517 | le32_to_cpu(JFS_IP(dentry->d_inode)->i_dtroot.header.idotdot); | |
1da177e4 | 1518 | |
44003728 | 1519 | return d_obtain_alias(jfs_iget(dentry->d_inode->i_sb, parent_ino)); |
1da177e4 LT |
1520 | } |
1521 | ||
92e1d5be | 1522 | const struct inode_operations jfs_dir_inode_operations = { |
1da177e4 LT |
1523 | .create = jfs_create, |
1524 | .lookup = jfs_lookup, | |
1525 | .link = jfs_link, | |
1526 | .unlink = jfs_unlink, | |
1527 | .symlink = jfs_symlink, | |
1528 | .mkdir = jfs_mkdir, | |
1529 | .rmdir = jfs_rmdir, | |
1530 | .mknod = jfs_mknod, | |
1531 | .rename = jfs_rename, | |
1532 | .setxattr = jfs_setxattr, | |
1533 | .getxattr = jfs_getxattr, | |
1534 | .listxattr = jfs_listxattr, | |
1535 | .removexattr = jfs_removexattr, | |
1536 | #ifdef CONFIG_JFS_POSIX_ACL | |
1537 | .setattr = jfs_setattr, | |
1538 | .permission = jfs_permission, | |
1539 | #endif | |
1540 | }; | |
1541 | ||
4b6f5d20 | 1542 | const struct file_operations jfs_dir_operations = { |
1da177e4 LT |
1543 | .read = generic_read_dir, |
1544 | .readdir = jfs_readdir, | |
1545 | .fsync = jfs_fsync, | |
baab81fa | 1546 | .unlocked_ioctl = jfs_ioctl, |
ef1fc2f0 AK |
1547 | #ifdef CONFIG_COMPAT |
1548 | .compat_ioctl = jfs_compat_ioctl, | |
1549 | #endif | |
1da177e4 LT |
1550 | }; |
1551 | ||
1552 | static int jfs_ci_hash(struct dentry *dir, struct qstr *this) | |
1553 | { | |
1554 | unsigned long hash; | |
1555 | int i; | |
1556 | ||
1557 | hash = init_name_hash(); | |
1558 | for (i=0; i < this->len; i++) | |
1559 | hash = partial_name_hash(tolower(this->name[i]), hash); | |
1560 | this->hash = end_name_hash(hash); | |
1561 | ||
1562 | return 0; | |
1563 | } | |
1564 | ||
1565 | static int jfs_ci_compare(struct dentry *dir, struct qstr *a, struct qstr *b) | |
1566 | { | |
1567 | int i, result = 1; | |
1568 | ||
1569 | if (a->len != b->len) | |
1570 | goto out; | |
1571 | for (i=0; i < a->len; i++) { | |
1572 | if (tolower(a->name[i]) != tolower(b->name[i])) | |
1573 | goto out; | |
1574 | } | |
1575 | result = 0; | |
1576 | ||
1577 | /* | |
1578 | * We want creates to preserve case. A negative dentry, a, that | |
1579 | * has a different case than b may cause a new entry to be created | |
1580 | * with the wrong case. Since we can't tell if a comes from a negative | |
1581 | * dentry, we blindly replace it with b. This should be harmless if | |
1582 | * a is not a negative dentry. | |
1583 | */ | |
1584 | memcpy((unsigned char *)a->name, b->name, a->len); | |
1585 | out: | |
1586 | return result; | |
1587 | } | |
1588 | ||
1589 | struct dentry_operations jfs_ci_dentry_operations = | |
1590 | { | |
1591 | .d_hash = jfs_ci_hash, | |
1592 | .d_compare = jfs_ci_compare, | |
1593 | }; |