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