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