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Commit | Line | Data |
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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 | |
63f83c9f | 7 | * the Free Software Foundation; either version 2 of the License, or |
1da177e4 | 8 | * (at your option) any later version. |
63f83c9f | 9 | * |
1da177e4 LT |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
13 | * the GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
63f83c9f | 16 | * along with this program; if not, write to the Free Software |
1da177e4 LT |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
18 | */ | |
19 | ||
20 | #include <linux/fs.h> | |
21 | #include <linux/ctype.h> | |
22 | #include <linux/quotaops.h> | |
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 | * | |
63f83c9f | 44 | * FUNCTION: free uncommitted extended attributes from working map |
4f4b401b DK |
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 | * | |
63f83c9f | 65 | * PARAMETER: dip - parent directory vnode |
1da177e4 LT |
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); | |
087387f9 AM |
100 | if (IS_ERR(ip)) { |
101 | rc = PTR_ERR(ip); | |
1da177e4 LT |
102 | goto out2; |
103 | } | |
104 | ||
105 | tid = txBegin(dip->i_sb, 0); | |
106 | ||
1de87444 IM |
107 | mutex_lock(&JFS_IP(dip)->commit_mutex); |
108 | mutex_lock(&JFS_IP(ip)->commit_mutex); | |
1da177e4 | 109 | |
4f4b401b DK |
110 | rc = jfs_init_acl(tid, ip, dip); |
111 | if (rc) | |
112 | goto out3; | |
113 | ||
1d15b10f DK |
114 | rc = jfs_init_security(tid, ip, dip); |
115 | if (rc) { | |
116 | txAbort(tid, 0); | |
117 | goto out3; | |
118 | } | |
119 | ||
1da177e4 LT |
120 | if ((rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE))) { |
121 | jfs_err("jfs_create: dtSearch returned %d", rc); | |
4f4b401b | 122 | txAbort(tid, 0); |
1da177e4 LT |
123 | goto out3; |
124 | } | |
125 | ||
126 | tblk = tid_to_tblock(tid); | |
127 | tblk->xflag |= COMMIT_CREATE; | |
128 | tblk->ino = ip->i_ino; | |
129 | tblk->u.ixpxd = JFS_IP(ip)->ixpxd; | |
130 | ||
131 | iplist[0] = dip; | |
132 | iplist[1] = ip; | |
133 | ||
134 | /* | |
135 | * initialize the child XAD tree root in-line in inode | |
136 | */ | |
137 | xtInitRoot(tid, ip); | |
138 | ||
139 | /* | |
140 | * create entry in parent directory for child directory | |
141 | * (dtInsert() releases parent directory page) | |
142 | */ | |
143 | ino = ip->i_ino; | |
144 | if ((rc = dtInsert(tid, dip, &dname, &ino, &btstack))) { | |
145 | if (rc == -EIO) { | |
146 | jfs_err("jfs_create: dtInsert returned -EIO"); | |
147 | txAbort(tid, 1); /* Marks Filesystem dirty */ | |
148 | } else | |
149 | txAbort(tid, 0); /* Filesystem full */ | |
150 | goto out3; | |
151 | } | |
152 | ||
153 | ip->i_op = &jfs_file_inode_operations; | |
154 | ip->i_fop = &jfs_file_operations; | |
155 | ip->i_mapping->a_ops = &jfs_aops; | |
156 | ||
157 | insert_inode_hash(ip); | |
158 | mark_inode_dirty(ip); | |
159 | ||
160 | dip->i_ctime = dip->i_mtime = CURRENT_TIME; | |
161 | ||
162 | mark_inode_dirty(dip); | |
163 | ||
164 | rc = txCommit(tid, 2, &iplist[0], 0); | |
165 | ||
166 | out3: | |
167 | txEnd(tid); | |
1de87444 | 168 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 169 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 | 170 | if (rc) { |
4f4b401b | 171 | free_ea_wmap(ip); |
1da177e4 LT |
172 | ip->i_nlink = 0; |
173 | iput(ip); | |
174 | } else | |
175 | d_instantiate(dentry, ip); | |
176 | ||
177 | out2: | |
178 | free_UCSname(&dname); | |
179 | ||
1da177e4 LT |
180 | out1: |
181 | ||
182 | jfs_info("jfs_create: rc:%d", rc); | |
183 | return rc; | |
184 | } | |
185 | ||
186 | ||
187 | /* | |
188 | * NAME: jfs_mkdir(dip, dentry, mode) | |
189 | * | |
190 | * FUNCTION: create a child directory in the parent directory <dip> | |
191 | * with name = <from dentry> and mode = <mode> | |
192 | * | |
63f83c9f | 193 | * PARAMETER: dip - parent directory vnode |
1da177e4 LT |
194 | * dentry - dentry of child directory |
195 | * mode - create mode (rwxrwxrwx). | |
196 | * | |
197 | * RETURN: Errors from subroutines | |
198 | * | |
199 | * note: | |
200 | * EACCESS: user needs search+write permission on the parent directory | |
201 | */ | |
202 | static int jfs_mkdir(struct inode *dip, struct dentry *dentry, int mode) | |
203 | { | |
204 | int rc = 0; | |
205 | tid_t tid; /* transaction id */ | |
206 | struct inode *ip = NULL; /* child directory inode */ | |
207 | ino_t ino; | |
208 | struct component_name dname; /* child directory name */ | |
209 | struct btstack btstack; | |
210 | struct inode *iplist[2]; | |
211 | struct tblock *tblk; | |
212 | ||
213 | jfs_info("jfs_mkdir: dip:0x%p name:%s", dip, dentry->d_name.name); | |
214 | ||
215 | /* link count overflow on parent directory ? */ | |
216 | if (dip->i_nlink == JFS_LINK_MAX) { | |
217 | rc = -EMLINK; | |
218 | goto out1; | |
219 | } | |
220 | ||
221 | /* | |
222 | * search parent directory for entry/freespace | |
223 | * (dtSearch() returns parent directory page pinned) | |
224 | */ | |
225 | if ((rc = get_UCSname(&dname, dentry))) | |
226 | goto out1; | |
227 | ||
228 | /* | |
229 | * Either iAlloc() or txBegin() may block. Deadlock can occur if we | |
230 | * block there while holding dtree page, so we allocate the inode & | |
231 | * begin the transaction before we search the directory. | |
232 | */ | |
233 | ip = ialloc(dip, S_IFDIR | mode); | |
087387f9 AM |
234 | if (IS_ERR(ip)) { |
235 | rc = PTR_ERR(ip); | |
1da177e4 LT |
236 | goto out2; |
237 | } | |
238 | ||
239 | tid = txBegin(dip->i_sb, 0); | |
240 | ||
1de87444 IM |
241 | mutex_lock(&JFS_IP(dip)->commit_mutex); |
242 | mutex_lock(&JFS_IP(ip)->commit_mutex); | |
1da177e4 | 243 | |
4f4b401b DK |
244 | rc = jfs_init_acl(tid, ip, dip); |
245 | if (rc) | |
246 | goto out3; | |
247 | ||
1d15b10f DK |
248 | rc = jfs_init_security(tid, ip, dip); |
249 | if (rc) { | |
250 | txAbort(tid, 0); | |
251 | goto out3; | |
252 | } | |
253 | ||
1da177e4 LT |
254 | if ((rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE))) { |
255 | jfs_err("jfs_mkdir: dtSearch returned %d", rc); | |
4f4b401b | 256 | txAbort(tid, 0); |
1da177e4 LT |
257 | goto out3; |
258 | } | |
259 | ||
260 | tblk = tid_to_tblock(tid); | |
261 | tblk->xflag |= COMMIT_CREATE; | |
262 | tblk->ino = ip->i_ino; | |
263 | tblk->u.ixpxd = JFS_IP(ip)->ixpxd; | |
264 | ||
265 | iplist[0] = dip; | |
266 | iplist[1] = ip; | |
267 | ||
268 | /* | |
269 | * initialize the child directory in-line in inode | |
270 | */ | |
271 | dtInitRoot(tid, ip, dip->i_ino); | |
272 | ||
273 | /* | |
274 | * create entry in parent directory for child directory | |
275 | * (dtInsert() releases parent directory page) | |
276 | */ | |
277 | ino = ip->i_ino; | |
278 | if ((rc = dtInsert(tid, dip, &dname, &ino, &btstack))) { | |
279 | if (rc == -EIO) { | |
280 | jfs_err("jfs_mkdir: dtInsert returned -EIO"); | |
281 | txAbort(tid, 1); /* Marks Filesystem dirty */ | |
282 | } else | |
283 | txAbort(tid, 0); /* Filesystem full */ | |
284 | goto out3; | |
285 | } | |
286 | ||
287 | ip->i_nlink = 2; /* for '.' */ | |
288 | ip->i_op = &jfs_dir_inode_operations; | |
289 | ip->i_fop = &jfs_dir_operations; | |
290 | ||
291 | insert_inode_hash(ip); | |
292 | mark_inode_dirty(ip); | |
293 | ||
294 | /* update parent directory inode */ | |
d8c76e6f | 295 | inc_nlink(dip); /* for '..' from child directory */ |
1da177e4 LT |
296 | dip->i_ctime = dip->i_mtime = CURRENT_TIME; |
297 | mark_inode_dirty(dip); | |
298 | ||
299 | rc = txCommit(tid, 2, &iplist[0], 0); | |
300 | ||
301 | out3: | |
302 | txEnd(tid); | |
1de87444 | 303 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 304 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 | 305 | if (rc) { |
4f4b401b | 306 | free_ea_wmap(ip); |
1da177e4 LT |
307 | ip->i_nlink = 0; |
308 | iput(ip); | |
309 | } else | |
310 | d_instantiate(dentry, ip); | |
311 | ||
312 | out2: | |
313 | free_UCSname(&dname); | |
314 | ||
1da177e4 LT |
315 | |
316 | out1: | |
317 | ||
318 | jfs_info("jfs_mkdir: rc:%d", rc); | |
319 | return rc; | |
320 | } | |
321 | ||
322 | /* | |
323 | * NAME: jfs_rmdir(dip, dentry) | |
324 | * | |
325 | * FUNCTION: remove a link to child directory | |
326 | * | |
63f83c9f | 327 | * PARAMETER: dip - parent inode |
1da177e4 LT |
328 | * dentry - child directory dentry |
329 | * | |
330 | * RETURN: -EINVAL - if name is . or .. | |
331 | * -EINVAL - if . or .. exist but are invalid. | |
332 | * errors from subroutines | |
333 | * | |
334 | * note: | |
63f83c9f DK |
335 | * if other threads have the directory open when the last link |
336 | * is removed, the "." and ".." entries, if present, are removed before | |
337 | * rmdir() returns and no new entries may be created in the directory, | |
338 | * but the directory is not removed until the last reference to | |
1da177e4 LT |
339 | * the directory is released (cf.unlink() of regular file). |
340 | */ | |
341 | static int jfs_rmdir(struct inode *dip, struct dentry *dentry) | |
342 | { | |
343 | int rc; | |
344 | tid_t tid; /* transaction id */ | |
345 | struct inode *ip = dentry->d_inode; | |
346 | ino_t ino; | |
347 | struct component_name dname; | |
348 | struct inode *iplist[2]; | |
349 | struct tblock *tblk; | |
350 | ||
351 | jfs_info("jfs_rmdir: dip:0x%p name:%s", dip, dentry->d_name.name); | |
352 | ||
353 | /* Init inode for quota operations. */ | |
354 | DQUOT_INIT(ip); | |
355 | ||
356 | /* directory must be empty to be removed */ | |
357 | if (!dtEmpty(ip)) { | |
358 | rc = -ENOTEMPTY; | |
359 | goto out; | |
360 | } | |
361 | ||
362 | if ((rc = get_UCSname(&dname, dentry))) { | |
363 | goto out; | |
364 | } | |
365 | ||
366 | tid = txBegin(dip->i_sb, 0); | |
367 | ||
1de87444 IM |
368 | mutex_lock(&JFS_IP(dip)->commit_mutex); |
369 | mutex_lock(&JFS_IP(ip)->commit_mutex); | |
1da177e4 LT |
370 | |
371 | iplist[0] = dip; | |
372 | iplist[1] = ip; | |
373 | ||
374 | tblk = tid_to_tblock(tid); | |
375 | tblk->xflag |= COMMIT_DELETE; | |
376 | tblk->u.ip = ip; | |
377 | ||
378 | /* | |
379 | * delete the entry of target directory from parent directory | |
380 | */ | |
381 | ino = ip->i_ino; | |
382 | if ((rc = dtDelete(tid, dip, &dname, &ino, JFS_REMOVE))) { | |
383 | jfs_err("jfs_rmdir: dtDelete returned %d", rc); | |
384 | if (rc == -EIO) | |
385 | txAbort(tid, 1); | |
386 | txEnd(tid); | |
1de87444 | 387 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 388 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 LT |
389 | |
390 | goto out2; | |
391 | } | |
392 | ||
393 | /* update parent directory's link count corresponding | |
394 | * to ".." entry of the target directory deleted | |
395 | */ | |
1da177e4 | 396 | dip->i_ctime = dip->i_mtime = CURRENT_TIME; |
9a53c3a7 | 397 | inode_dec_link_count(dip); |
1da177e4 LT |
398 | |
399 | /* | |
400 | * OS/2 could have created EA and/or ACL | |
401 | */ | |
402 | /* free EA from both persistent and working map */ | |
403 | if (JFS_IP(ip)->ea.flag & DXD_EXTENT) { | |
404 | /* free EA pages */ | |
405 | txEA(tid, ip, &JFS_IP(ip)->ea, NULL); | |
406 | } | |
407 | JFS_IP(ip)->ea.flag = 0; | |
408 | ||
409 | /* free ACL from both persistent and working map */ | |
410 | if (JFS_IP(ip)->acl.flag & DXD_EXTENT) { | |
411 | /* free ACL pages */ | |
412 | txEA(tid, ip, &JFS_IP(ip)->acl, NULL); | |
413 | } | |
414 | JFS_IP(ip)->acl.flag = 0; | |
415 | ||
416 | /* mark the target directory as deleted */ | |
ce71ec36 | 417 | clear_nlink(ip); |
1da177e4 LT |
418 | mark_inode_dirty(ip); |
419 | ||
420 | rc = txCommit(tid, 2, &iplist[0], 0); | |
421 | ||
422 | txEnd(tid); | |
423 | ||
1de87444 | 424 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 425 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 LT |
426 | |
427 | /* | |
428 | * Truncating the directory index table is not guaranteed. It | |
429 | * may need to be done iteratively | |
430 | */ | |
431 | if (test_cflag(COMMIT_Stale, dip)) { | |
432 | if (dip->i_size > 1) | |
433 | jfs_truncate_nolock(dip, 0); | |
434 | ||
435 | clear_cflag(COMMIT_Stale, dip); | |
436 | } | |
437 | ||
438 | out2: | |
439 | free_UCSname(&dname); | |
440 | ||
441 | out: | |
442 | jfs_info("jfs_rmdir: rc:%d", rc); | |
443 | return rc; | |
444 | } | |
445 | ||
446 | /* | |
447 | * NAME: jfs_unlink(dip, dentry) | |
448 | * | |
63f83c9f | 449 | * FUNCTION: remove a link to object <vp> named by <name> |
1da177e4 LT |
450 | * from parent directory <dvp> |
451 | * | |
63f83c9f DK |
452 | * PARAMETER: dip - inode of parent directory |
453 | * dentry - dentry of object to be removed | |
1da177e4 LT |
454 | * |
455 | * RETURN: errors from subroutines | |
456 | * | |
457 | * note: | |
458 | * temporary file: if one or more processes have the file open | |
459 | * when the last link is removed, the link will be removed before | |
460 | * unlink() returns, but the removal of the file contents will be | |
461 | * postponed until all references to the files are closed. | |
462 | * | |
463 | * JFS does NOT support unlink() on directories. | |
464 | * | |
465 | */ | |
466 | static int jfs_unlink(struct inode *dip, struct dentry *dentry) | |
467 | { | |
468 | int rc; | |
469 | tid_t tid; /* transaction id */ | |
470 | struct inode *ip = dentry->d_inode; | |
471 | ino_t ino; | |
472 | struct component_name dname; /* object name */ | |
473 | struct inode *iplist[2]; | |
474 | struct tblock *tblk; | |
475 | s64 new_size = 0; | |
476 | int commit_flag; | |
477 | ||
478 | jfs_info("jfs_unlink: dip:0x%p name:%s", dip, dentry->d_name.name); | |
479 | ||
480 | /* Init inode for quota operations. */ | |
481 | DQUOT_INIT(ip); | |
482 | ||
483 | if ((rc = get_UCSname(&dname, dentry))) | |
484 | goto out; | |
485 | ||
486 | IWRITE_LOCK(ip); | |
487 | ||
488 | tid = txBegin(dip->i_sb, 0); | |
489 | ||
1de87444 IM |
490 | mutex_lock(&JFS_IP(dip)->commit_mutex); |
491 | mutex_lock(&JFS_IP(ip)->commit_mutex); | |
1da177e4 LT |
492 | |
493 | iplist[0] = dip; | |
494 | iplist[1] = ip; | |
495 | ||
496 | /* | |
497 | * delete the entry of target file from parent directory | |
498 | */ | |
499 | ino = ip->i_ino; | |
500 | if ((rc = dtDelete(tid, dip, &dname, &ino, JFS_REMOVE))) { | |
501 | jfs_err("jfs_unlink: dtDelete returned %d", rc); | |
502 | if (rc == -EIO) | |
503 | txAbort(tid, 1); /* Marks FS Dirty */ | |
504 | txEnd(tid); | |
1de87444 | 505 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 506 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 LT |
507 | IWRITE_UNLOCK(ip); |
508 | goto out1; | |
509 | } | |
510 | ||
511 | ASSERT(ip->i_nlink); | |
512 | ||
513 | ip->i_ctime = dip->i_ctime = dip->i_mtime = CURRENT_TIME; | |
514 | mark_inode_dirty(dip); | |
515 | ||
516 | /* update target's inode */ | |
9a53c3a7 | 517 | inode_dec_link_count(ip); |
1da177e4 LT |
518 | |
519 | /* | |
520 | * commit zero link count object | |
521 | */ | |
522 | if (ip->i_nlink == 0) { | |
523 | assert(!test_cflag(COMMIT_Nolink, ip)); | |
524 | /* free block resources */ | |
525 | if ((new_size = commitZeroLink(tid, ip)) < 0) { | |
526 | txAbort(tid, 1); /* Marks FS Dirty */ | |
527 | txEnd(tid); | |
1de87444 | 528 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 529 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 LT |
530 | IWRITE_UNLOCK(ip); |
531 | rc = new_size; | |
532 | goto out1; | |
533 | } | |
534 | tblk = tid_to_tblock(tid); | |
535 | tblk->xflag |= COMMIT_DELETE; | |
536 | tblk->u.ip = ip; | |
537 | } | |
538 | ||
539 | /* | |
540 | * Incomplete truncate of file data can | |
541 | * result in timing problems unless we synchronously commit the | |
542 | * transaction. | |
543 | */ | |
544 | if (new_size) | |
545 | commit_flag = COMMIT_SYNC; | |
546 | else | |
547 | commit_flag = 0; | |
548 | ||
549 | /* | |
550 | * If xtTruncate was incomplete, commit synchronously to avoid | |
551 | * timing complications | |
552 | */ | |
553 | rc = txCommit(tid, 2, &iplist[0], commit_flag); | |
554 | ||
555 | txEnd(tid); | |
556 | ||
1de87444 | 557 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 558 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 LT |
559 | |
560 | while (new_size && (rc == 0)) { | |
561 | tid = txBegin(dip->i_sb, 0); | |
1de87444 | 562 | mutex_lock(&JFS_IP(ip)->commit_mutex); |
1da177e4 LT |
563 | new_size = xtTruncate_pmap(tid, ip, new_size); |
564 | if (new_size < 0) { | |
565 | txAbort(tid, 1); /* Marks FS Dirty */ | |
566 | rc = new_size; | |
567 | } else | |
568 | rc = txCommit(tid, 2, &iplist[0], COMMIT_SYNC); | |
569 | txEnd(tid); | |
1de87444 | 570 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
1da177e4 LT |
571 | } |
572 | ||
573 | if (ip->i_nlink == 0) | |
574 | set_cflag(COMMIT_Nolink, ip); | |
575 | ||
576 | IWRITE_UNLOCK(ip); | |
577 | ||
578 | /* | |
579 | * Truncating the directory index table is not guaranteed. It | |
580 | * may need to be done iteratively | |
581 | */ | |
582 | if (test_cflag(COMMIT_Stale, dip)) { | |
583 | if (dip->i_size > 1) | |
584 | jfs_truncate_nolock(dip, 0); | |
585 | ||
586 | clear_cflag(COMMIT_Stale, dip); | |
587 | } | |
588 | ||
589 | out1: | |
590 | free_UCSname(&dname); | |
591 | out: | |
592 | jfs_info("jfs_unlink: rc:%d", rc); | |
593 | return rc; | |
594 | } | |
595 | ||
596 | /* | |
597 | * NAME: commitZeroLink() | |
598 | * | |
599 | * FUNCTION: for non-directory, called by jfs_remove(), | |
600 | * truncate a regular file, directory or symbolic | |
63f83c9f | 601 | * link to zero length. return 0 if type is not |
1da177e4 LT |
602 | * one of these. |
603 | * | |
604 | * if the file is currently associated with a VM segment | |
605 | * only permanent disk and inode map resources are freed, | |
606 | * and neither the inode nor indirect blocks are modified | |
607 | * so that the resources can be later freed in the work | |
608 | * map by ctrunc1. | |
609 | * if there is no VM segment on entry, the resources are | |
610 | * freed in both work and permanent map. | |
63f83c9f | 611 | * (? for temporary file - memory object is cached even |
1da177e4 LT |
612 | * after no reference: |
613 | * reference count > 0 - ) | |
614 | * | |
615 | * PARAMETERS: cd - pointer to commit data structure. | |
616 | * current inode is the one to truncate. | |
617 | * | |
618 | * RETURN: Errors from subroutines | |
619 | */ | |
620 | static s64 commitZeroLink(tid_t tid, struct inode *ip) | |
621 | { | |
622 | int filetype; | |
623 | struct tblock *tblk; | |
624 | ||
625 | jfs_info("commitZeroLink: tid = %d, ip = 0x%p", tid, ip); | |
626 | ||
627 | filetype = ip->i_mode & S_IFMT; | |
628 | switch (filetype) { | |
629 | case S_IFREG: | |
630 | break; | |
631 | case S_IFLNK: | |
632 | /* fast symbolic link */ | |
633 | if (ip->i_size < IDATASIZE) { | |
634 | ip->i_size = 0; | |
635 | return 0; | |
636 | } | |
637 | break; | |
638 | default: | |
639 | assert(filetype != S_IFDIR); | |
640 | return 0; | |
641 | } | |
642 | ||
643 | set_cflag(COMMIT_Freewmap, ip); | |
644 | ||
645 | /* mark transaction of block map update type */ | |
646 | tblk = tid_to_tblock(tid); | |
647 | tblk->xflag |= COMMIT_PMAP; | |
648 | ||
649 | /* | |
650 | * free EA | |
651 | */ | |
652 | if (JFS_IP(ip)->ea.flag & DXD_EXTENT) | |
653 | /* acquire maplock on EA to be freed from block map */ | |
654 | txEA(tid, ip, &JFS_IP(ip)->ea, NULL); | |
655 | ||
656 | /* | |
657 | * free ACL | |
658 | */ | |
659 | if (JFS_IP(ip)->acl.flag & DXD_EXTENT) | |
660 | /* acquire maplock on EA to be freed from block map */ | |
661 | txEA(tid, ip, &JFS_IP(ip)->acl, NULL); | |
662 | ||
663 | /* | |
664 | * free xtree/data (truncate to zero length): | |
63f83c9f | 665 | * free xtree/data pages from cache if COMMIT_PWMAP, |
1da177e4 LT |
666 | * free xtree/data blocks from persistent block map, and |
667 | * free xtree/data blocks from working block map if COMMIT_PWMAP; | |
668 | */ | |
669 | if (ip->i_size) | |
670 | return xtTruncate_pmap(tid, ip, 0); | |
671 | ||
672 | return 0; | |
673 | } | |
674 | ||
675 | ||
676 | /* | |
1868f4aa | 677 | * NAME: jfs_free_zero_link() |
1da177e4 LT |
678 | * |
679 | * FUNCTION: for non-directory, called by iClose(), | |
63f83c9f | 680 | * free resources of a file from cache and WORKING map |
1da177e4 LT |
681 | * for a file previously committed with zero link count |
682 | * while associated with a pager object, | |
683 | * | |
684 | * PARAMETER: ip - pointer to inode of file. | |
1da177e4 | 685 | */ |
1868f4aa | 686 | void jfs_free_zero_link(struct inode *ip) |
1da177e4 | 687 | { |
1da177e4 LT |
688 | int type; |
689 | ||
1868f4aa | 690 | jfs_info("jfs_free_zero_link: ip = 0x%p", ip); |
1da177e4 LT |
691 | |
692 | /* return if not reg or symbolic link or if size is | |
693 | * already ok. | |
694 | */ | |
695 | type = ip->i_mode & S_IFMT; | |
696 | ||
697 | switch (type) { | |
698 | case S_IFREG: | |
699 | break; | |
700 | case S_IFLNK: | |
701 | /* if its contained in inode nothing to do */ | |
702 | if (ip->i_size < IDATASIZE) | |
1868f4aa | 703 | return; |
1da177e4 LT |
704 | break; |
705 | default: | |
1868f4aa | 706 | return; |
1da177e4 LT |
707 | } |
708 | ||
709 | /* | |
710 | * free EA | |
711 | */ | |
712 | if (JFS_IP(ip)->ea.flag & DXD_EXTENT) { | |
713 | s64 xaddr = addressDXD(&JFS_IP(ip)->ea); | |
714 | int xlen = lengthDXD(&JFS_IP(ip)->ea); | |
715 | struct maplock maplock; /* maplock for COMMIT_WMAP */ | |
716 | struct pxd_lock *pxdlock; /* maplock for COMMIT_WMAP */ | |
717 | ||
718 | /* free EA pages from cache */ | |
719 | invalidate_dxd_metapages(ip, JFS_IP(ip)->ea); | |
720 | ||
721 | /* free EA extent from working block map */ | |
722 | maplock.index = 1; | |
723 | pxdlock = (struct pxd_lock *) & maplock; | |
724 | pxdlock->flag = mlckFREEPXD; | |
725 | PXDaddress(&pxdlock->pxd, xaddr); | |
726 | PXDlength(&pxdlock->pxd, xlen); | |
727 | txFreeMap(ip, pxdlock, NULL, COMMIT_WMAP); | |
728 | } | |
729 | ||
730 | /* | |
731 | * free ACL | |
732 | */ | |
733 | if (JFS_IP(ip)->acl.flag & DXD_EXTENT) { | |
734 | s64 xaddr = addressDXD(&JFS_IP(ip)->acl); | |
735 | int xlen = lengthDXD(&JFS_IP(ip)->acl); | |
736 | struct maplock maplock; /* maplock for COMMIT_WMAP */ | |
737 | struct pxd_lock *pxdlock; /* maplock for COMMIT_WMAP */ | |
738 | ||
739 | invalidate_dxd_metapages(ip, JFS_IP(ip)->acl); | |
740 | ||
741 | /* free ACL extent from working block map */ | |
742 | maplock.index = 1; | |
743 | pxdlock = (struct pxd_lock *) & maplock; | |
744 | pxdlock->flag = mlckFREEPXD; | |
745 | PXDaddress(&pxdlock->pxd, xaddr); | |
746 | PXDlength(&pxdlock->pxd, xlen); | |
747 | txFreeMap(ip, pxdlock, NULL, COMMIT_WMAP); | |
748 | } | |
749 | ||
750 | /* | |
751 | * free xtree/data (truncate to zero length): | |
752 | * free xtree/data pages from cache, and | |
753 | * free xtree/data blocks from working block map; | |
754 | */ | |
755 | if (ip->i_size) | |
1868f4aa | 756 | xtTruncate(0, ip, 0, COMMIT_WMAP); |
1da177e4 LT |
757 | } |
758 | ||
759 | /* | |
760 | * NAME: jfs_link(vp, dvp, name, crp) | |
761 | * | |
762 | * FUNCTION: create a link to <vp> by the name = <name> | |
763 | * in the parent directory <dvp> | |
764 | * | |
63f83c9f | 765 | * PARAMETER: vp - target object |
1da177e4 LT |
766 | * dvp - parent directory of new link |
767 | * name - name of new link to target object | |
768 | * crp - credential | |
769 | * | |
770 | * RETURN: Errors from subroutines | |
771 | * | |
772 | * note: | |
773 | * JFS does NOT support link() on directories (to prevent circular | |
774 | * path in the directory hierarchy); | |
775 | * EPERM: the target object is a directory, and either the caller | |
776 | * does not have appropriate privileges or the implementation prohibits | |
777 | * using link() on directories [XPG4.2]. | |
778 | * | |
779 | * JFS does NOT support links between file systems: | |
780 | * EXDEV: target object and new link are on different file systems and | |
781 | * implementation does not support links between file systems [XPG4.2]. | |
782 | */ | |
783 | static int jfs_link(struct dentry *old_dentry, | |
784 | struct inode *dir, struct dentry *dentry) | |
785 | { | |
786 | int rc; | |
787 | tid_t tid; | |
788 | struct inode *ip = old_dentry->d_inode; | |
789 | ino_t ino; | |
790 | struct component_name dname; | |
791 | struct btstack btstack; | |
792 | struct inode *iplist[2]; | |
793 | ||
794 | jfs_info("jfs_link: %s %s", old_dentry->d_name.name, | |
795 | dentry->d_name.name); | |
796 | ||
797 | if (ip->i_nlink == JFS_LINK_MAX) | |
798 | return -EMLINK; | |
799 | ||
800 | if (ip->i_nlink == 0) | |
801 | return -ENOENT; | |
802 | ||
803 | tid = txBegin(ip->i_sb, 0); | |
804 | ||
1de87444 IM |
805 | mutex_lock(&JFS_IP(dir)->commit_mutex); |
806 | mutex_lock(&JFS_IP(ip)->commit_mutex); | |
1da177e4 LT |
807 | |
808 | /* | |
809 | * scan parent directory for entry/freespace | |
810 | */ | |
811 | if ((rc = get_UCSname(&dname, dentry))) | |
812 | goto out; | |
813 | ||
814 | if ((rc = dtSearch(dir, &dname, &ino, &btstack, JFS_CREATE))) | |
815 | goto free_dname; | |
816 | ||
817 | /* | |
818 | * create entry for new link in parent directory | |
819 | */ | |
820 | ino = ip->i_ino; | |
821 | if ((rc = dtInsert(tid, dir, &dname, &ino, &btstack))) | |
822 | goto free_dname; | |
823 | ||
824 | /* update object inode */ | |
d8c76e6f | 825 | inc_nlink(ip); /* for new link */ |
1da177e4 | 826 | ip->i_ctime = CURRENT_TIME; |
988a6490 | 827 | dir->i_ctime = dir->i_mtime = CURRENT_TIME; |
1da177e4 LT |
828 | mark_inode_dirty(dir); |
829 | atomic_inc(&ip->i_count); | |
830 | ||
831 | iplist[0] = ip; | |
832 | iplist[1] = dir; | |
833 | rc = txCommit(tid, 2, &iplist[0], 0); | |
834 | ||
835 | if (rc) { | |
9a53c3a7 | 836 | ip->i_nlink--; /* never instantiated */ |
1da177e4 LT |
837 | iput(ip); |
838 | } else | |
839 | d_instantiate(dentry, ip); | |
840 | ||
841 | free_dname: | |
842 | free_UCSname(&dname); | |
843 | ||
844 | out: | |
845 | txEnd(tid); | |
846 | ||
1de87444 | 847 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 848 | mutex_unlock(&JFS_IP(dir)->commit_mutex); |
1da177e4 LT |
849 | |
850 | jfs_info("jfs_link: rc:%d", rc); | |
851 | return rc; | |
852 | } | |
853 | ||
854 | /* | |
855 | * NAME: jfs_symlink(dip, dentry, name) | |
856 | * | |
857 | * FUNCTION: creates a symbolic link to <symlink> by name <name> | |
858 | * in directory <dip> | |
859 | * | |
860 | * PARAMETER: dip - parent directory vnode | |
63f83c9f DK |
861 | * dentry - dentry of symbolic link |
862 | * name - the path name of the existing object | |
1da177e4 LT |
863 | * that will be the source of the link |
864 | * | |
865 | * RETURN: errors from subroutines | |
866 | * | |
867 | * note: | |
868 | * ENAMETOOLONG: pathname resolution of a symbolic link produced | |
869 | * an intermediate result whose length exceeds PATH_MAX [XPG4.2] | |
870 | */ | |
871 | ||
872 | static int jfs_symlink(struct inode *dip, struct dentry *dentry, | |
873 | const char *name) | |
874 | { | |
875 | int rc; | |
876 | tid_t tid; | |
877 | ino_t ino = 0; | |
878 | struct component_name dname; | |
879 | int ssize; /* source pathname size */ | |
880 | struct btstack btstack; | |
881 | struct inode *ip = dentry->d_inode; | |
882 | unchar *i_fastsymlink; | |
883 | s64 xlen = 0; | |
884 | int bmask = 0, xsize; | |
885 | s64 extent = 0, xaddr; | |
886 | struct metapage *mp; | |
887 | struct super_block *sb; | |
888 | struct tblock *tblk; | |
889 | ||
890 | struct inode *iplist[2]; | |
891 | ||
892 | jfs_info("jfs_symlink: dip:0x%p name:%s", dip, name); | |
893 | ||
894 | ssize = strlen(name) + 1; | |
895 | ||
896 | /* | |
897 | * search parent directory for entry/freespace | |
898 | * (dtSearch() returns parent directory page pinned) | |
899 | */ | |
900 | ||
901 | if ((rc = get_UCSname(&dname, dentry))) | |
902 | goto out1; | |
903 | ||
904 | /* | |
905 | * allocate on-disk/in-memory inode for symbolic link: | |
906 | * (iAlloc() returns new, locked inode) | |
907 | */ | |
908 | ip = ialloc(dip, S_IFLNK | 0777); | |
087387f9 AM |
909 | if (IS_ERR(ip)) { |
910 | rc = PTR_ERR(ip); | |
1da177e4 LT |
911 | goto out2; |
912 | } | |
913 | ||
914 | tid = txBegin(dip->i_sb, 0); | |
915 | ||
1de87444 IM |
916 | mutex_lock(&JFS_IP(dip)->commit_mutex); |
917 | mutex_lock(&JFS_IP(ip)->commit_mutex); | |
1da177e4 | 918 | |
1d15b10f DK |
919 | rc = jfs_init_security(tid, ip, dip); |
920 | if (rc) | |
921 | goto out3; | |
922 | ||
1da177e4 LT |
923 | tblk = tid_to_tblock(tid); |
924 | tblk->xflag |= COMMIT_CREATE; | |
925 | tblk->ino = ip->i_ino; | |
926 | tblk->u.ixpxd = JFS_IP(ip)->ixpxd; | |
927 | ||
928 | /* fix symlink access permission | |
63f83c9f | 929 | * (dir_create() ANDs in the u.u_cmask, |
1da177e4 LT |
930 | * but symlinks really need to be 777 access) |
931 | */ | |
932 | ip->i_mode |= 0777; | |
933 | ||
934 | /* | |
935 | * write symbolic link target path name | |
936 | */ | |
937 | xtInitRoot(tid, ip); | |
938 | ||
939 | /* | |
940 | * write source path name inline in on-disk inode (fast symbolic link) | |
941 | */ | |
942 | ||
943 | if (ssize <= IDATASIZE) { | |
944 | ip->i_op = &jfs_symlink_inode_operations; | |
945 | ||
946 | i_fastsymlink = JFS_IP(ip)->i_inline; | |
947 | memcpy(i_fastsymlink, name, ssize); | |
948 | ip->i_size = ssize - 1; | |
949 | ||
950 | /* | |
951 | * if symlink is > 128 bytes, we don't have the space to | |
952 | * store inline extended attributes | |
953 | */ | |
954 | if (ssize > sizeof (JFS_IP(ip)->i_inline)) | |
955 | JFS_IP(ip)->mode2 &= ~INLINEEA; | |
956 | ||
957 | jfs_info("jfs_symlink: fast symlink added ssize:%d name:%s ", | |
958 | ssize, name); | |
959 | } | |
960 | /* | |
961 | * write source path name in a single extent | |
962 | */ | |
963 | else { | |
964 | jfs_info("jfs_symlink: allocate extent ip:0x%p", ip); | |
965 | ||
966 | ip->i_op = &page_symlink_inode_operations; | |
967 | ip->i_mapping->a_ops = &jfs_aops; | |
968 | ||
969 | /* | |
63f83c9f | 970 | * even though the data of symlink object (source |
1da177e4 LT |
971 | * path name) is treated as non-journaled user data, |
972 | * it is read/written thru buffer cache for performance. | |
973 | */ | |
974 | sb = ip->i_sb; | |
975 | bmask = JFS_SBI(sb)->bsize - 1; | |
976 | xsize = (ssize + bmask) & ~bmask; | |
977 | xaddr = 0; | |
978 | xlen = xsize >> JFS_SBI(sb)->l2bsize; | |
979 | if ((rc = xtInsert(tid, ip, 0, 0, xlen, &xaddr, 0))) { | |
980 | txAbort(tid, 0); | |
1da177e4 LT |
981 | goto out3; |
982 | } | |
983 | extent = xaddr; | |
984 | ip->i_size = ssize - 1; | |
985 | while (ssize) { | |
986 | /* This is kind of silly since PATH_MAX == 4K */ | |
987 | int copy_size = min(ssize, PSIZE); | |
988 | ||
989 | mp = get_metapage(ip, xaddr, PSIZE, 1); | |
990 | ||
991 | if (mp == NULL) { | |
992 | xtTruncate(tid, ip, 0, COMMIT_PWMAP); | |
993 | rc = -EIO; | |
994 | txAbort(tid, 0); | |
995 | goto out3; | |
996 | } | |
997 | memcpy(mp->data, name, copy_size); | |
998 | flush_metapage(mp); | |
999 | ssize -= copy_size; | |
1000 | name += copy_size; | |
1001 | xaddr += JFS_SBI(sb)->nbperpage; | |
1002 | } | |
1003 | } | |
1004 | ||
1005 | /* | |
1006 | * create entry for symbolic link in parent directory | |
1007 | */ | |
1008 | rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE); | |
1009 | if (rc == 0) { | |
1010 | ino = ip->i_ino; | |
1011 | rc = dtInsert(tid, dip, &dname, &ino, &btstack); | |
1012 | } | |
1013 | if (rc) { | |
1014 | if (xlen) | |
1015 | xtTruncate(tid, ip, 0, COMMIT_PWMAP); | |
1016 | txAbort(tid, 0); | |
1017 | /* discard new inode */ | |
1018 | goto out3; | |
1019 | } | |
1020 | ||
1021 | insert_inode_hash(ip); | |
1022 | mark_inode_dirty(ip); | |
1023 | ||
988a6490 DK |
1024 | dip->i_ctime = dip->i_mtime = CURRENT_TIME; |
1025 | mark_inode_dirty(dip); | |
1da177e4 LT |
1026 | /* |
1027 | * commit update of parent directory and link object | |
1028 | */ | |
1029 | ||
1030 | iplist[0] = dip; | |
1031 | iplist[1] = ip; | |
1032 | rc = txCommit(tid, 2, &iplist[0], 0); | |
1033 | ||
1034 | out3: | |
1035 | txEnd(tid); | |
1de87444 | 1036 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b05 | 1037 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4 | 1038 | if (rc) { |
4f4b401b | 1039 | free_ea_wmap(ip); |
1da177e4 LT |
1040 | ip->i_nlink = 0; |
1041 | iput(ip); | |
1042 | } else | |
1043 | d_instantiate(dentry, ip); | |
1044 | ||
1045 | out2: | |
1046 | free_UCSname(&dname); | |
1047 | ||
1da177e4 LT |
1048 | out1: |
1049 | jfs_info("jfs_symlink: rc:%d", rc); | |
1050 | return rc; | |
1051 | } | |
1052 | ||
1053 | ||
1054 | /* | |
1055 | * NAME: jfs_rename | |
1056 | * | |
1057 | * FUNCTION: rename a file or directory | |
1058 | */ | |
1059 | static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
1060 | struct inode *new_dir, struct dentry *new_dentry) | |
1061 | { | |
1062 | struct btstack btstack; | |
1063 | ino_t ino; | |
1064 | struct component_name new_dname; | |
1065 | struct inode *new_ip; | |
1066 | struct component_name old_dname; | |
1067 | struct inode *old_ip; | |
1068 | int rc; | |
1069 | tid_t tid; | |
1070 | struct tlock *tlck; | |
1071 | struct dt_lock *dtlck; | |
1072 | struct lv *lv; | |
1073 | int ipcount; | |
1074 | struct inode *iplist[4]; | |
1075 | struct tblock *tblk; | |
1076 | s64 new_size = 0; | |
1077 | int commit_flag; | |
1078 | ||
1079 | ||
1080 | jfs_info("jfs_rename: %s %s", old_dentry->d_name.name, | |
1081 | new_dentry->d_name.name); | |
1082 | ||
1083 | old_ip = old_dentry->d_inode; | |
1084 | new_ip = new_dentry->d_inode; | |
1085 | ||
1086 | if ((rc = get_UCSname(&old_dname, old_dentry))) | |
1087 | goto out1; | |
1088 | ||
1089 | if ((rc = get_UCSname(&new_dname, new_dentry))) | |
1090 | goto out2; | |
1091 | ||
1092 | /* | |
1093 | * Make sure source inode number is what we think it is | |
1094 | */ | |
1095 | rc = dtSearch(old_dir, &old_dname, &ino, &btstack, JFS_LOOKUP); | |
1096 | if (rc || (ino != old_ip->i_ino)) { | |
1097 | rc = -ENOENT; | |
1098 | goto out3; | |
1099 | } | |
1100 | ||
1101 | /* | |
1102 | * Make sure dest inode number (if any) is what we think it is | |
1103 | */ | |
1104 | rc = dtSearch(new_dir, &new_dname, &ino, &btstack, JFS_LOOKUP); | |
1105 | if (rc == 0) { | |
1106 | if ((new_ip == 0) || (ino != new_ip->i_ino)) { | |
1107 | rc = -ESTALE; | |
1108 | goto out3; | |
1109 | } | |
1110 | } else if (rc != -ENOENT) | |
1111 | goto out3; | |
1112 | else if (new_ip) { | |
1113 | /* no entry exists, but one was expected */ | |
1114 | rc = -ESTALE; | |
1115 | goto out3; | |
1116 | } | |
1117 | ||
1118 | if (S_ISDIR(old_ip->i_mode)) { | |
1119 | if (new_ip) { | |
1120 | if (!dtEmpty(new_ip)) { | |
1121 | rc = -ENOTEMPTY; | |
1122 | goto out3; | |
1123 | } | |
1124 | } else if ((new_dir != old_dir) && | |
1125 | (new_dir->i_nlink == JFS_LINK_MAX)) { | |
1126 | rc = -EMLINK; | |
1127 | goto out3; | |
1128 | } | |
1129 | } else if (new_ip) { | |
1130 | IWRITE_LOCK(new_ip); | |
1131 | /* Init inode for quota operations. */ | |
1132 | DQUOT_INIT(new_ip); | |
1133 | } | |
1134 | ||
1135 | /* | |
1136 | * The real work starts here | |
1137 | */ | |
1138 | tid = txBegin(new_dir->i_sb, 0); | |
1139 | ||
1de87444 IM |
1140 | mutex_lock(&JFS_IP(new_dir)->commit_mutex); |
1141 | mutex_lock(&JFS_IP(old_ip)->commit_mutex); | |
1da177e4 | 1142 | if (old_dir != new_dir) |
1de87444 | 1143 | mutex_lock(&JFS_IP(old_dir)->commit_mutex); |
1da177e4 LT |
1144 | |
1145 | if (new_ip) { | |
1de87444 | 1146 | mutex_lock(&JFS_IP(new_ip)->commit_mutex); |
1da177e4 LT |
1147 | /* |
1148 | * Change existing directory entry to new inode number | |
1149 | */ | |
1150 | ino = new_ip->i_ino; | |
1151 | rc = dtModify(tid, new_dir, &new_dname, &ino, | |
1152 | old_ip->i_ino, JFS_RENAME); | |
1153 | if (rc) | |
1154 | goto out4; | |
9a53c3a7 | 1155 | drop_nlink(new_ip); |
1da177e4 | 1156 | if (S_ISDIR(new_ip->i_mode)) { |
9a53c3a7 | 1157 | drop_nlink(new_ip); |
1da177e4 | 1158 | if (new_ip->i_nlink) { |
48ce8b05 | 1159 | mutex_unlock(&JFS_IP(new_ip)->commit_mutex); |
1da177e4 | 1160 | if (old_dir != new_dir) |
1de87444 | 1161 | mutex_unlock(&JFS_IP(old_dir)->commit_mutex); |
48ce8b05 ED |
1162 | mutex_unlock(&JFS_IP(old_ip)->commit_mutex); |
1163 | mutex_unlock(&JFS_IP(new_dir)->commit_mutex); | |
1da177e4 LT |
1164 | if (!S_ISDIR(old_ip->i_mode) && new_ip) |
1165 | IWRITE_UNLOCK(new_ip); | |
1166 | jfs_error(new_ip->i_sb, | |
1167 | "jfs_rename: new_ip->i_nlink != 0"); | |
1168 | return -EIO; | |
1169 | } | |
1170 | tblk = tid_to_tblock(tid); | |
1171 | tblk->xflag |= COMMIT_DELETE; | |
1172 | tblk->u.ip = new_ip; | |
1173 | } else if (new_ip->i_nlink == 0) { | |
1174 | assert(!test_cflag(COMMIT_Nolink, new_ip)); | |
1175 | /* free block resources */ | |
1176 | if ((new_size = commitZeroLink(tid, new_ip)) < 0) { | |
1177 | txAbort(tid, 1); /* Marks FS Dirty */ | |
63f83c9f | 1178 | rc = new_size; |
1da177e4 LT |
1179 | goto out4; |
1180 | } | |
1181 | tblk = tid_to_tblock(tid); | |
1182 | tblk->xflag |= COMMIT_DELETE; | |
1183 | tblk->u.ip = new_ip; | |
1184 | } else { | |
1185 | new_ip->i_ctime = CURRENT_TIME; | |
1186 | mark_inode_dirty(new_ip); | |
1187 | } | |
1188 | } else { | |
1189 | /* | |
1190 | * Add new directory entry | |
1191 | */ | |
1192 | rc = dtSearch(new_dir, &new_dname, &ino, &btstack, | |
1193 | JFS_CREATE); | |
1194 | if (rc) { | |
1195 | jfs_err("jfs_rename didn't expect dtSearch to fail " | |
1196 | "w/rc = %d", rc); | |
1197 | goto out4; | |
1198 | } | |
1199 | ||
1200 | ino = old_ip->i_ino; | |
1201 | rc = dtInsert(tid, new_dir, &new_dname, &ino, &btstack); | |
1202 | if (rc) { | |
1203 | if (rc == -EIO) | |
1204 | jfs_err("jfs_rename: dtInsert returned -EIO"); | |
1205 | goto out4; | |
1206 | } | |
1207 | if (S_ISDIR(old_ip->i_mode)) | |
d8c76e6f | 1208 | inc_nlink(new_dir); |
1da177e4 LT |
1209 | } |
1210 | /* | |
1211 | * Remove old directory entry | |
1212 | */ | |
1213 | ||
1214 | ino = old_ip->i_ino; | |
1215 | rc = dtDelete(tid, old_dir, &old_dname, &ino, JFS_REMOVE); | |
1216 | if (rc) { | |
1217 | jfs_err("jfs_rename did not expect dtDelete to return rc = %d", | |
1218 | rc); | |
1219 | txAbort(tid, 1); /* Marks Filesystem dirty */ | |
1220 | goto out4; | |
1221 | } | |
1222 | if (S_ISDIR(old_ip->i_mode)) { | |
9a53c3a7 | 1223 | drop_nlink(old_dir); |
1da177e4 LT |
1224 | if (old_dir != new_dir) { |
1225 | /* | |
1226 | * Change inode number of parent for moved directory | |
1227 | */ | |
1228 | ||
1229 | JFS_IP(old_ip)->i_dtroot.header.idotdot = | |
1230 | cpu_to_le32(new_dir->i_ino); | |
1231 | ||
1232 | /* Linelock header of dtree */ | |
1233 | tlck = txLock(tid, old_ip, | |
1234 | (struct metapage *) &JFS_IP(old_ip)->bxflag, | |
1235 | tlckDTREE | tlckBTROOT | tlckRELINK); | |
1236 | dtlck = (struct dt_lock *) & tlck->lock; | |
1237 | ASSERT(dtlck->index == 0); | |
1238 | lv = & dtlck->lv[0]; | |
1239 | lv->offset = 0; | |
1240 | lv->length = 1; | |
1241 | dtlck->index++; | |
1242 | } | |
1243 | } | |
1244 | ||
1245 | /* | |
1246 | * Update ctime on changed/moved inodes & mark dirty | |
1247 | */ | |
1248 | old_ip->i_ctime = CURRENT_TIME; | |
1249 | mark_inode_dirty(old_ip); | |
1250 | ||
1251 | new_dir->i_ctime = new_dir->i_mtime = current_fs_time(new_dir->i_sb); | |
1252 | mark_inode_dirty(new_dir); | |
1253 | ||
1254 | /* Build list of inodes modified by this transaction */ | |
1255 | ipcount = 0; | |
1256 | iplist[ipcount++] = old_ip; | |
1257 | if (new_ip) | |
1258 | iplist[ipcount++] = new_ip; | |
1259 | iplist[ipcount++] = old_dir; | |
1260 | ||
1261 | if (old_dir != new_dir) { | |
1262 | iplist[ipcount++] = new_dir; | |
1263 | old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME; | |
1264 | mark_inode_dirty(old_dir); | |
1265 | } | |
1266 | ||
1267 | /* | |
1268 | * Incomplete truncate of file data can | |
1269 | * result in timing problems unless we synchronously commit the | |
1270 | * transaction. | |
1271 | */ | |
1272 | if (new_size) | |
1273 | commit_flag = COMMIT_SYNC; | |
1274 | else | |
1275 | commit_flag = 0; | |
1276 | ||
1277 | rc = txCommit(tid, ipcount, iplist, commit_flag); | |
1278 | ||
1279 | out4: | |
1280 | txEnd(tid); | |
1da177e4 | 1281 | if (new_ip) |
1de87444 | 1282 | mutex_unlock(&JFS_IP(new_ip)->commit_mutex); |
48ce8b05 ED |
1283 | if (old_dir != new_dir) |
1284 | mutex_unlock(&JFS_IP(old_dir)->commit_mutex); | |
1285 | mutex_unlock(&JFS_IP(old_ip)->commit_mutex); | |
1286 | mutex_unlock(&JFS_IP(new_dir)->commit_mutex); | |
1da177e4 LT |
1287 | |
1288 | while (new_size && (rc == 0)) { | |
1289 | tid = txBegin(new_ip->i_sb, 0); | |
1de87444 | 1290 | mutex_lock(&JFS_IP(new_ip)->commit_mutex); |
1da177e4 LT |
1291 | new_size = xtTruncate_pmap(tid, new_ip, new_size); |
1292 | if (new_size < 0) { | |
1293 | txAbort(tid, 1); | |
63f83c9f | 1294 | rc = new_size; |
1da177e4 LT |
1295 | } else |
1296 | rc = txCommit(tid, 1, &new_ip, COMMIT_SYNC); | |
1297 | txEnd(tid); | |
1de87444 | 1298 | mutex_unlock(&JFS_IP(new_ip)->commit_mutex); |
1da177e4 LT |
1299 | } |
1300 | if (new_ip && (new_ip->i_nlink == 0)) | |
1301 | set_cflag(COMMIT_Nolink, new_ip); | |
1302 | out3: | |
1303 | free_UCSname(&new_dname); | |
1304 | out2: | |
1305 | free_UCSname(&old_dname); | |
1306 | out1: | |
1307 | if (new_ip && !S_ISDIR(new_ip->i_mode)) | |
1308 | IWRITE_UNLOCK(new_ip); | |
1309 | /* | |
1310 | * Truncating the directory index table is not guaranteed. It | |
1311 | * may need to be done iteratively | |
1312 | */ | |
1313 | if (test_cflag(COMMIT_Stale, old_dir)) { | |
1314 | if (old_dir->i_size > 1) | |
1315 | jfs_truncate_nolock(old_dir, 0); | |
1316 | ||
1317 | clear_cflag(COMMIT_Stale, old_dir); | |
1318 | } | |
1319 | ||
1320 | jfs_info("jfs_rename: returning %d", rc); | |
1321 | return rc; | |
1322 | } | |
1323 | ||
1324 | ||
1325 | /* | |
1326 | * NAME: jfs_mknod | |
1327 | * | |
1328 | * FUNCTION: Create a special file (device) | |
1329 | */ | |
1330 | static int jfs_mknod(struct inode *dir, struct dentry *dentry, | |
1331 | int mode, dev_t rdev) | |
1332 | { | |
1333 | struct jfs_inode_info *jfs_ip; | |
1334 | struct btstack btstack; | |
1335 | struct component_name dname; | |
1336 | ino_t ino; | |
1337 | struct inode *ip; | |
1338 | struct inode *iplist[2]; | |
1339 | int rc; | |
1340 | tid_t tid; | |
1341 | struct tblock *tblk; | |
1342 | ||
1343 | if (!new_valid_dev(rdev)) | |
1344 | return -EINVAL; | |
1345 | ||
1346 | jfs_info("jfs_mknod: %s", dentry->d_name.name); | |
1347 | ||
1348 | if ((rc = get_UCSname(&dname, dentry))) | |
1349 | goto out; | |
1350 | ||
1351 | ip = ialloc(dir, mode); | |
087387f9 AM |
1352 | if (IS_ERR(ip)) { |
1353 | rc = PTR_ERR(ip); | |
1da177e4 LT |
1354 | goto out1; |
1355 | } | |
1356 | jfs_ip = JFS_IP(ip); | |
1357 | ||
1358 | tid = txBegin(dir->i_sb, 0); | |
1359 | ||
1de87444 IM |
1360 | mutex_lock(&JFS_IP(dir)->commit_mutex); |
1361 | mutex_lock(&JFS_IP(ip)->commit_mutex); | |
1da177e4 | 1362 | |
4f4b401b DK |
1363 | rc = jfs_init_acl(tid, ip, dir); |
1364 | if (rc) | |
1da177e4 LT |
1365 | goto out3; |
1366 | ||
1d15b10f DK |
1367 | rc = jfs_init_security(tid, ip, dir); |
1368 | if (rc) { | |
1369 | txAbort(tid, 0); | |
1370 | goto out3; | |
1371 | } | |
1372 | ||
4f4b401b DK |
1373 | if ((rc = dtSearch(dir, &dname, &ino, &btstack, JFS_CREATE))) { |
1374 | txAbort(tid, 0); | |
1375 | goto out3; | |
1376 | } | |
1377 | ||
1da177e4 LT |
1378 | tblk = tid_to_tblock(tid); |
1379 | tblk->xflag |= COMMIT_CREATE; | |
1380 | tblk->ino = ip->i_ino; | |
1381 | tblk->u.ixpxd = JFS_IP(ip)->ixpxd; | |
1382 | ||
1383 | ino = ip->i_ino; | |
4f4b401b DK |
1384 | if ((rc = dtInsert(tid, dir, &dname, &ino, &btstack))) { |
1385 | txAbort(tid, 0); | |
1da177e4 | 1386 | goto out3; |
4f4b401b | 1387 | } |
1da177e4 LT |
1388 | |
1389 | ip->i_op = &jfs_file_inode_operations; | |
1390 | jfs_ip->dev = new_encode_dev(rdev); | |
1391 | init_special_inode(ip, ip->i_mode, rdev); | |
1392 | ||
1393 | insert_inode_hash(ip); | |
1394 | mark_inode_dirty(ip); | |
1395 | ||
1396 | dir->i_ctime = dir->i_mtime = CURRENT_TIME; | |
1397 | ||
1398 | mark_inode_dirty(dir); | |
1399 | ||
1400 | iplist[0] = dir; | |
1401 | iplist[1] = ip; | |
1402 | rc = txCommit(tid, 2, iplist, 0); | |
1403 | ||
1404 | out3: | |
1405 | txEnd(tid); | |
1de87444 IM |
1406 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
1407 | mutex_unlock(&JFS_IP(dir)->commit_mutex); | |
1da177e4 | 1408 | if (rc) { |
4f4b401b | 1409 | free_ea_wmap(ip); |
1da177e4 LT |
1410 | ip->i_nlink = 0; |
1411 | iput(ip); | |
1412 | } else | |
1413 | d_instantiate(dentry, ip); | |
1414 | ||
1415 | out1: | |
1416 | free_UCSname(&dname); | |
1417 | ||
1da177e4 LT |
1418 | out: |
1419 | jfs_info("jfs_mknod: returning %d", rc); | |
1420 | return rc; | |
1421 | } | |
1422 | ||
1423 | static struct dentry *jfs_lookup(struct inode *dip, struct dentry *dentry, struct nameidata *nd) | |
1424 | { | |
1425 | struct btstack btstack; | |
1426 | ino_t inum; | |
1427 | struct inode *ip; | |
1428 | struct component_name key; | |
1429 | const char *name = dentry->d_name.name; | |
1430 | int len = dentry->d_name.len; | |
1431 | int rc; | |
1432 | ||
1433 | jfs_info("jfs_lookup: name = %s", name); | |
1434 | ||
686762c8 DK |
1435 | if (JFS_SBI(dip->i_sb)->mntflag & JFS_OS2) |
1436 | dentry->d_op = &jfs_ci_dentry_operations; | |
1da177e4 LT |
1437 | |
1438 | if ((name[0] == '.') && (len == 1)) | |
1439 | inum = dip->i_ino; | |
1440 | else if (strcmp(name, "..") == 0) | |
1441 | inum = PARENT(dip); | |
1442 | else { | |
1443 | if ((rc = get_UCSname(&key, dentry))) | |
1444 | return ERR_PTR(rc); | |
1445 | rc = dtSearch(dip, &key, &inum, &btstack, JFS_LOOKUP); | |
1446 | free_UCSname(&key); | |
1447 | if (rc == -ENOENT) { | |
1448 | d_add(dentry, NULL); | |
1449 | return ERR_PTR(0); | |
1450 | } else if (rc) { | |
1451 | jfs_err("jfs_lookup: dtSearch returned %d", rc); | |
1452 | return ERR_PTR(rc); | |
1453 | } | |
1454 | } | |
1455 | ||
1456 | ip = iget(dip->i_sb, inum); | |
1457 | if (ip == NULL || is_bad_inode(ip)) { | |
1458 | jfs_err("jfs_lookup: iget failed on inum %d", (uint) inum); | |
1459 | if (ip) | |
1460 | iput(ip); | |
1461 | return ERR_PTR(-EACCES); | |
1462 | } | |
1463 | ||
1da177e4 LT |
1464 | dentry = d_splice_alias(ip, dentry); |
1465 | ||
1466 | if (dentry && (JFS_SBI(dip->i_sb)->mntflag & JFS_OS2)) | |
1467 | dentry->d_op = &jfs_ci_dentry_operations; | |
1468 | ||
1469 | return dentry; | |
1470 | } | |
1471 | ||
1472 | struct dentry *jfs_get_parent(struct dentry *dentry) | |
1473 | { | |
1474 | struct super_block *sb = dentry->d_inode->i_sb; | |
1475 | struct dentry *parent = ERR_PTR(-ENOENT); | |
1476 | struct inode *inode; | |
1477 | unsigned long parent_ino; | |
1478 | ||
1479 | parent_ino = | |
1480 | le32_to_cpu(JFS_IP(dentry->d_inode)->i_dtroot.header.idotdot); | |
1481 | inode = iget(sb, parent_ino); | |
1482 | if (inode) { | |
1483 | if (is_bad_inode(inode)) { | |
1484 | iput(inode); | |
1485 | parent = ERR_PTR(-EACCES); | |
1486 | } else { | |
1487 | parent = d_alloc_anon(inode); | |
1488 | if (!parent) { | |
1489 | parent = ERR_PTR(-ENOMEM); | |
1490 | iput(inode); | |
1491 | } | |
1492 | } | |
1493 | } | |
1494 | ||
1495 | return parent; | |
1496 | } | |
1497 | ||
1498 | struct inode_operations jfs_dir_inode_operations = { | |
1499 | .create = jfs_create, | |
1500 | .lookup = jfs_lookup, | |
1501 | .link = jfs_link, | |
1502 | .unlink = jfs_unlink, | |
1503 | .symlink = jfs_symlink, | |
1504 | .mkdir = jfs_mkdir, | |
1505 | .rmdir = jfs_rmdir, | |
1506 | .mknod = jfs_mknod, | |
1507 | .rename = jfs_rename, | |
1508 | .setxattr = jfs_setxattr, | |
1509 | .getxattr = jfs_getxattr, | |
1510 | .listxattr = jfs_listxattr, | |
1511 | .removexattr = jfs_removexattr, | |
1512 | #ifdef CONFIG_JFS_POSIX_ACL | |
1513 | .setattr = jfs_setattr, | |
1514 | .permission = jfs_permission, | |
1515 | #endif | |
1516 | }; | |
1517 | ||
4b6f5d20 | 1518 | const struct file_operations jfs_dir_operations = { |
1da177e4 LT |
1519 | .read = generic_read_dir, |
1520 | .readdir = jfs_readdir, | |
1521 | .fsync = jfs_fsync, | |
fa3241d2 | 1522 | .ioctl = jfs_ioctl, |
1da177e4 LT |
1523 | }; |
1524 | ||
1525 | static int jfs_ci_hash(struct dentry *dir, struct qstr *this) | |
1526 | { | |
1527 | unsigned long hash; | |
1528 | int i; | |
1529 | ||
1530 | hash = init_name_hash(); | |
1531 | for (i=0; i < this->len; i++) | |
1532 | hash = partial_name_hash(tolower(this->name[i]), hash); | |
1533 | this->hash = end_name_hash(hash); | |
1534 | ||
1535 | return 0; | |
1536 | } | |
1537 | ||
1538 | static int jfs_ci_compare(struct dentry *dir, struct qstr *a, struct qstr *b) | |
1539 | { | |
1540 | int i, result = 1; | |
1541 | ||
1542 | if (a->len != b->len) | |
1543 | goto out; | |
1544 | for (i=0; i < a->len; i++) { | |
1545 | if (tolower(a->name[i]) != tolower(b->name[i])) | |
1546 | goto out; | |
1547 | } | |
1548 | result = 0; | |
1549 | ||
1550 | /* | |
1551 | * We want creates to preserve case. A negative dentry, a, that | |
1552 | * has a different case than b may cause a new entry to be created | |
1553 | * with the wrong case. Since we can't tell if a comes from a negative | |
1554 | * dentry, we blindly replace it with b. This should be harmless if | |
1555 | * a is not a negative dentry. | |
1556 | */ | |
1557 | memcpy((unsigned char *)a->name, b->name, a->len); | |
1558 | out: | |
1559 | return result; | |
1560 | } | |
1561 | ||
1562 | struct dentry_operations jfs_ci_dentry_operations = | |
1563 | { | |
1564 | .d_hash = jfs_ci_hash, | |
1565 | .d_compare = jfs_ci_compare, | |
1566 | }; |