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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of version 2 of the GNU General Public License as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it would be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
11 | * | |
12 | * Further, this software is distributed without any warranty that it is | |
13 | * free of the rightful claim of any third person regarding infringement | |
14 | * or the like. Any license provided herein, whether implied or | |
15 | * otherwise, applies only to this software file. Patent licenses, if | |
16 | * any, provided herein do not apply to combinations of this program with | |
17 | * other software, or any other product whatsoever. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write the Free Software Foundation, Inc., 59 | |
21 | * Temple Place - Suite 330, Boston MA 02111-1307, USA. | |
22 | * | |
23 | * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, | |
24 | * Mountain View, CA 94043, or: | |
25 | * | |
26 | * http://www.sgi.com | |
27 | * | |
28 | * For further information regarding this notice, see: | |
29 | * | |
30 | * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ | |
31 | */ | |
32 | ||
33 | #include "xfs.h" | |
34 | #include "xfs_macros.h" | |
35 | #include "xfs_types.h" | |
36 | #include "xfs_inum.h" | |
37 | #include "xfs_log.h" | |
38 | #include "xfs_trans.h" | |
39 | #include "xfs_sb.h" | |
40 | #include "xfs_dir.h" | |
41 | #include "xfs_dir2.h" | |
42 | #include "xfs_dmapi.h" | |
43 | #include "xfs_mount.h" | |
44 | #include "xfs_bmap_btree.h" | |
45 | #include "xfs_attr_sf.h" | |
46 | #include "xfs_dir_sf.h" | |
47 | #include "xfs_dir2_sf.h" | |
48 | #include "xfs_dinode.h" | |
49 | #include "xfs_inode_item.h" | |
50 | #include "xfs_inode.h" | |
51 | #include "xfs_bmap.h" | |
52 | #include "xfs_error.h" | |
53 | #include "xfs_quota.h" | |
54 | #include "xfs_refcache.h" | |
55 | #include "xfs_utils.h" | |
56 | #include "xfs_trans_space.h" | |
57 | #include "xfs_da_btree.h" | |
58 | #include "xfs_dir_leaf.h" | |
59 | ||
60 | ||
61 | /* | |
62 | * Given an array of up to 4 inode pointers, unlock the pointed to inodes. | |
63 | * If there are fewer than 4 entries in the array, the empty entries will | |
64 | * be at the end and will have NULL pointers in them. | |
65 | */ | |
66 | STATIC void | |
67 | xfs_rename_unlock4( | |
68 | xfs_inode_t **i_tab, | |
69 | uint lock_mode) | |
70 | { | |
71 | int i; | |
72 | ||
73 | xfs_iunlock(i_tab[0], lock_mode); | |
74 | for (i = 1; i < 4; i++) { | |
75 | if (i_tab[i] == NULL) { | |
76 | break; | |
77 | } | |
78 | /* | |
79 | * Watch out for duplicate entries in the table. | |
80 | */ | |
81 | if (i_tab[i] != i_tab[i-1]) { | |
82 | xfs_iunlock(i_tab[i], lock_mode); | |
83 | } | |
84 | } | |
85 | } | |
86 | ||
87 | #ifdef DEBUG | |
88 | int xfs_rename_skip, xfs_rename_nskip; | |
89 | #endif | |
90 | ||
91 | /* | |
92 | * The following routine will acquire the locks required for a rename | |
93 | * operation. The code understands the semantics of renames and will | |
94 | * validate that name1 exists under dp1 & that name2 may or may not | |
95 | * exist under dp2. | |
96 | * | |
97 | * We are renaming dp1/name1 to dp2/name2. | |
98 | * | |
99 | * Return ENOENT if dp1 does not exist, other lookup errors, or 0 for success. | |
100 | */ | |
101 | STATIC int | |
102 | xfs_lock_for_rename( | |
103 | xfs_inode_t *dp1, /* old (source) directory inode */ | |
104 | xfs_inode_t *dp2, /* new (target) directory inode */ | |
105 | vname_t *vname1,/* old entry name */ | |
106 | vname_t *vname2,/* new entry name */ | |
107 | xfs_inode_t **ipp1, /* inode of old entry */ | |
108 | xfs_inode_t **ipp2, /* inode of new entry, if it | |
109 | already exists, NULL otherwise. */ | |
110 | xfs_inode_t **i_tab,/* array of inode returned, sorted */ | |
111 | int *num_inodes) /* number of inodes in array */ | |
112 | { | |
113 | xfs_inode_t *ip1, *ip2, *temp; | |
114 | xfs_ino_t inum1, inum2; | |
115 | int error; | |
116 | int i, j; | |
117 | uint lock_mode; | |
118 | int diff_dirs = (dp1 != dp2); | |
119 | ||
120 | ip2 = NULL; | |
121 | ||
122 | /* | |
123 | * First, find out the current inums of the entries so that we | |
124 | * can determine the initial locking order. We'll have to | |
125 | * sanity check stuff after all the locks have been acquired | |
126 | * to see if we still have the right inodes, directories, etc. | |
127 | */ | |
128 | lock_mode = xfs_ilock_map_shared(dp1); | |
129 | error = xfs_get_dir_entry(vname1, &ip1); | |
130 | if (error) { | |
131 | xfs_iunlock_map_shared(dp1, lock_mode); | |
132 | return error; | |
133 | } | |
134 | ||
135 | inum1 = ip1->i_ino; | |
136 | ||
137 | ASSERT(ip1); | |
138 | ITRACE(ip1); | |
139 | ||
140 | /* | |
141 | * Unlock dp1 and lock dp2 if they are different. | |
142 | */ | |
143 | ||
144 | if (diff_dirs) { | |
145 | xfs_iunlock_map_shared(dp1, lock_mode); | |
146 | lock_mode = xfs_ilock_map_shared(dp2); | |
147 | } | |
148 | ||
149 | error = xfs_dir_lookup_int(XFS_ITOBHV(dp2), lock_mode, | |
150 | vname2, &inum2, &ip2); | |
151 | if (error == ENOENT) { /* target does not need to exist. */ | |
152 | inum2 = 0; | |
153 | } else if (error) { | |
154 | /* | |
155 | * If dp2 and dp1 are the same, the next line unlocks dp1. | |
156 | * Got it? | |
157 | */ | |
158 | xfs_iunlock_map_shared(dp2, lock_mode); | |
159 | IRELE (ip1); | |
160 | return error; | |
161 | } else { | |
162 | ITRACE(ip2); | |
163 | } | |
164 | ||
165 | /* | |
166 | * i_tab contains a list of pointers to inodes. We initialize | |
167 | * the table here & we'll sort it. We will then use it to | |
168 | * order the acquisition of the inode locks. | |
169 | * | |
170 | * Note that the table may contain duplicates. e.g., dp1 == dp2. | |
171 | */ | |
172 | i_tab[0] = dp1; | |
173 | i_tab[1] = dp2; | |
174 | i_tab[2] = ip1; | |
175 | if (inum2 == 0) { | |
176 | *num_inodes = 3; | |
177 | i_tab[3] = NULL; | |
178 | } else { | |
179 | *num_inodes = 4; | |
180 | i_tab[3] = ip2; | |
181 | } | |
182 | ||
183 | /* | |
184 | * Sort the elements via bubble sort. (Remember, there are at | |
185 | * most 4 elements to sort, so this is adequate.) | |
186 | */ | |
187 | for (i=0; i < *num_inodes; i++) { | |
188 | for (j=1; j < *num_inodes; j++) { | |
189 | if (i_tab[j]->i_ino < i_tab[j-1]->i_ino) { | |
190 | temp = i_tab[j]; | |
191 | i_tab[j] = i_tab[j-1]; | |
192 | i_tab[j-1] = temp; | |
193 | } | |
194 | } | |
195 | } | |
196 | ||
197 | /* | |
198 | * We have dp2 locked. If it isn't first, unlock it. | |
199 | * If it is first, tell xfs_lock_inodes so it can skip it | |
200 | * when locking. if dp1 == dp2, xfs_lock_inodes will skip both | |
201 | * since they are equal. xfs_lock_inodes needs all these inodes | |
202 | * so that it can unlock and retry if there might be a dead-lock | |
203 | * potential with the log. | |
204 | */ | |
205 | ||
206 | if (i_tab[0] == dp2 && lock_mode == XFS_ILOCK_SHARED) { | |
207 | #ifdef DEBUG | |
208 | xfs_rename_skip++; | |
209 | #endif | |
210 | xfs_lock_inodes(i_tab, *num_inodes, 1, XFS_ILOCK_SHARED); | |
211 | } else { | |
212 | #ifdef DEBUG | |
213 | xfs_rename_nskip++; | |
214 | #endif | |
215 | xfs_iunlock_map_shared(dp2, lock_mode); | |
216 | xfs_lock_inodes(i_tab, *num_inodes, 0, XFS_ILOCK_SHARED); | |
217 | } | |
218 | ||
219 | /* | |
220 | * Set the return value. Null out any unused entries in i_tab. | |
221 | */ | |
222 | *ipp1 = *ipp2 = NULL; | |
223 | for (i=0; i < *num_inodes; i++) { | |
224 | if (i_tab[i]->i_ino == inum1) { | |
225 | *ipp1 = i_tab[i]; | |
226 | } | |
227 | if (i_tab[i]->i_ino == inum2) { | |
228 | *ipp2 = i_tab[i]; | |
229 | } | |
230 | } | |
231 | for (;i < 4; i++) { | |
232 | i_tab[i] = NULL; | |
233 | } | |
234 | return 0; | |
235 | } | |
236 | ||
237 | ||
238 | int rename_which_error_return = 0; | |
239 | ||
240 | /* | |
241 | * xfs_rename | |
242 | */ | |
243 | int | |
244 | xfs_rename( | |
245 | bhv_desc_t *src_dir_bdp, | |
246 | vname_t *src_vname, | |
247 | vnode_t *target_dir_vp, | |
248 | vname_t *target_vname, | |
249 | cred_t *credp) | |
250 | { | |
251 | xfs_trans_t *tp; | |
252 | xfs_inode_t *src_dp, *target_dp, *src_ip, *target_ip; | |
253 | xfs_mount_t *mp; | |
254 | int new_parent; /* moving to a new dir */ | |
255 | int src_is_directory; /* src_name is a directory */ | |
256 | int error; | |
257 | xfs_bmap_free_t free_list; | |
258 | xfs_fsblock_t first_block; | |
259 | int cancel_flags; | |
260 | int committed; | |
261 | xfs_inode_t *inodes[4]; | |
262 | int target_ip_dropped = 0; /* dropped target_ip link? */ | |
263 | vnode_t *src_dir_vp; | |
264 | bhv_desc_t *target_dir_bdp; | |
265 | int spaceres; | |
266 | int target_link_zero = 0; | |
267 | int num_inodes; | |
268 | char *src_name = VNAME(src_vname); | |
269 | char *target_name = VNAME(target_vname); | |
270 | int src_namelen = VNAMELEN(src_vname); | |
271 | int target_namelen = VNAMELEN(target_vname); | |
272 | ||
273 | src_dir_vp = BHV_TO_VNODE(src_dir_bdp); | |
274 | vn_trace_entry(src_dir_vp, "xfs_rename", (inst_t *)__return_address); | |
275 | vn_trace_entry(target_dir_vp, "xfs_rename", (inst_t *)__return_address); | |
276 | ||
277 | /* | |
278 | * Find the XFS behavior descriptor for the target directory | |
279 | * vnode since it was not handed to us. | |
280 | */ | |
281 | target_dir_bdp = vn_bhv_lookup_unlocked(VN_BHV_HEAD(target_dir_vp), | |
282 | &xfs_vnodeops); | |
283 | if (target_dir_bdp == NULL) { | |
284 | return XFS_ERROR(EXDEV); | |
285 | } | |
286 | ||
287 | src_dp = XFS_BHVTOI(src_dir_bdp); | |
288 | target_dp = XFS_BHVTOI(target_dir_bdp); | |
289 | mp = src_dp->i_mount; | |
290 | ||
291 | if (DM_EVENT_ENABLED(src_dir_vp->v_vfsp, src_dp, DM_EVENT_RENAME) || | |
292 | DM_EVENT_ENABLED(target_dir_vp->v_vfsp, | |
293 | target_dp, DM_EVENT_RENAME)) { | |
294 | error = XFS_SEND_NAMESP(mp, DM_EVENT_RENAME, | |
295 | src_dir_vp, DM_RIGHT_NULL, | |
296 | target_dir_vp, DM_RIGHT_NULL, | |
297 | src_name, target_name, | |
298 | 0, 0, 0); | |
299 | if (error) { | |
300 | return error; | |
301 | } | |
302 | } | |
303 | /* Return through std_return after this point. */ | |
304 | ||
305 | /* | |
306 | * Lock all the participating inodes. Depending upon whether | |
307 | * the target_name exists in the target directory, and | |
308 | * whether the target directory is the same as the source | |
309 | * directory, we can lock from 2 to 4 inodes. | |
310 | * xfs_lock_for_rename() will return ENOENT if src_name | |
311 | * does not exist in the source directory. | |
312 | */ | |
313 | tp = NULL; | |
314 | error = xfs_lock_for_rename(src_dp, target_dp, src_vname, | |
315 | target_vname, &src_ip, &target_ip, inodes, | |
316 | &num_inodes); | |
317 | ||
318 | if (error) { | |
319 | rename_which_error_return = __LINE__; | |
320 | /* | |
321 | * We have nothing locked, no inode references, and | |
322 | * no transaction, so just get out. | |
323 | */ | |
324 | goto std_return; | |
325 | } | |
326 | ||
327 | ASSERT(src_ip != NULL); | |
328 | ||
329 | if ((src_ip->i_d.di_mode & S_IFMT) == S_IFDIR) { | |
330 | /* | |
331 | * Check for link count overflow on target_dp | |
332 | */ | |
333 | if (target_ip == NULL && (src_dp != target_dp) && | |
334 | target_dp->i_d.di_nlink >= XFS_MAXLINK) { | |
335 | rename_which_error_return = __LINE__; | |
336 | error = XFS_ERROR(EMLINK); | |
337 | xfs_rename_unlock4(inodes, XFS_ILOCK_SHARED); | |
338 | goto rele_return; | |
339 | } | |
340 | } | |
341 | ||
342 | new_parent = (src_dp != target_dp); | |
343 | src_is_directory = ((src_ip->i_d.di_mode & S_IFMT) == S_IFDIR); | |
344 | ||
345 | /* | |
346 | * Drop the locks on our inodes so that we can start the transaction. | |
347 | */ | |
348 | xfs_rename_unlock4(inodes, XFS_ILOCK_SHARED); | |
349 | ||
350 | XFS_BMAP_INIT(&free_list, &first_block); | |
351 | tp = xfs_trans_alloc(mp, XFS_TRANS_RENAME); | |
352 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
353 | spaceres = XFS_RENAME_SPACE_RES(mp, target_namelen); | |
354 | error = xfs_trans_reserve(tp, spaceres, XFS_RENAME_LOG_RES(mp), 0, | |
355 | XFS_TRANS_PERM_LOG_RES, XFS_RENAME_LOG_COUNT); | |
356 | if (error == ENOSPC) { | |
357 | spaceres = 0; | |
358 | error = xfs_trans_reserve(tp, 0, XFS_RENAME_LOG_RES(mp), 0, | |
359 | XFS_TRANS_PERM_LOG_RES, XFS_RENAME_LOG_COUNT); | |
360 | } | |
361 | if (error) { | |
362 | rename_which_error_return = __LINE__; | |
363 | xfs_trans_cancel(tp, 0); | |
364 | goto rele_return; | |
365 | } | |
366 | ||
367 | /* | |
368 | * Attach the dquots to the inodes | |
369 | */ | |
370 | if ((error = XFS_QM_DQVOPRENAME(mp, inodes))) { | |
371 | xfs_trans_cancel(tp, cancel_flags); | |
372 | rename_which_error_return = __LINE__; | |
373 | goto rele_return; | |
374 | } | |
375 | ||
376 | /* | |
377 | * Reacquire the inode locks we dropped above. | |
378 | */ | |
379 | xfs_lock_inodes(inodes, num_inodes, 0, XFS_ILOCK_EXCL); | |
380 | ||
381 | /* | |
382 | * Join all the inodes to the transaction. From this point on, | |
383 | * we can rely on either trans_commit or trans_cancel to unlock | |
384 | * them. Note that we need to add a vnode reference to the | |
385 | * directories since trans_commit & trans_cancel will decrement | |
386 | * them when they unlock the inodes. Also, we need to be careful | |
387 | * not to add an inode to the transaction more than once. | |
388 | */ | |
389 | VN_HOLD(src_dir_vp); | |
390 | xfs_trans_ijoin(tp, src_dp, XFS_ILOCK_EXCL); | |
391 | if (new_parent) { | |
392 | VN_HOLD(target_dir_vp); | |
393 | xfs_trans_ijoin(tp, target_dp, XFS_ILOCK_EXCL); | |
394 | } | |
395 | if ((src_ip != src_dp) && (src_ip != target_dp)) { | |
396 | xfs_trans_ijoin(tp, src_ip, XFS_ILOCK_EXCL); | |
397 | } | |
398 | if ((target_ip != NULL) && | |
399 | (target_ip != src_ip) && | |
400 | (target_ip != src_dp) && | |
401 | (target_ip != target_dp)) { | |
402 | xfs_trans_ijoin(tp, target_ip, XFS_ILOCK_EXCL); | |
403 | } | |
404 | ||
405 | /* | |
406 | * Set up the target. | |
407 | */ | |
408 | if (target_ip == NULL) { | |
409 | /* | |
410 | * If there's no space reservation, check the entry will | |
411 | * fit before actually inserting it. | |
412 | */ | |
413 | if (spaceres == 0 && | |
414 | (error = XFS_DIR_CANENTER(mp, tp, target_dp, target_name, | |
415 | target_namelen))) { | |
416 | rename_which_error_return = __LINE__; | |
417 | goto error_return; | |
418 | } | |
419 | /* | |
420 | * If target does not exist and the rename crosses | |
421 | * directories, adjust the target directory link count | |
422 | * to account for the ".." reference from the new entry. | |
423 | */ | |
424 | error = XFS_DIR_CREATENAME(mp, tp, target_dp, target_name, | |
425 | target_namelen, src_ip->i_ino, | |
426 | &first_block, &free_list, spaceres); | |
427 | if (error == ENOSPC) { | |
428 | rename_which_error_return = __LINE__; | |
429 | goto error_return; | |
430 | } | |
431 | if (error) { | |
432 | rename_which_error_return = __LINE__; | |
433 | goto abort_return; | |
434 | } | |
435 | xfs_ichgtime(target_dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
436 | ||
437 | if (new_parent && src_is_directory) { | |
438 | error = xfs_bumplink(tp, target_dp); | |
439 | if (error) { | |
440 | rename_which_error_return = __LINE__; | |
441 | goto abort_return; | |
442 | } | |
443 | } | |
444 | } else { /* target_ip != NULL */ | |
445 | ||
446 | /* | |
447 | * If target exists and it's a directory, check that both | |
448 | * target and source are directories and that target can be | |
449 | * destroyed, or that neither is a directory. | |
450 | */ | |
451 | if ((target_ip->i_d.di_mode & S_IFMT) == S_IFDIR) { | |
452 | /* | |
453 | * Make sure target dir is empty. | |
454 | */ | |
455 | if (!(XFS_DIR_ISEMPTY(target_ip->i_mount, target_ip)) || | |
456 | (target_ip->i_d.di_nlink > 2)) { | |
457 | error = XFS_ERROR(EEXIST); | |
458 | rename_which_error_return = __LINE__; | |
459 | goto error_return; | |
460 | } | |
461 | } | |
462 | ||
463 | /* | |
464 | * Link the source inode under the target name. | |
465 | * If the source inode is a directory and we are moving | |
466 | * it across directories, its ".." entry will be | |
467 | * inconsistent until we replace that down below. | |
468 | * | |
469 | * In case there is already an entry with the same | |
470 | * name at the destination directory, remove it first. | |
471 | */ | |
472 | error = XFS_DIR_REPLACE(mp, tp, target_dp, target_name, | |
473 | target_namelen, src_ip->i_ino, &first_block, | |
474 | &free_list, spaceres); | |
475 | if (error) { | |
476 | rename_which_error_return = __LINE__; | |
477 | goto abort_return; | |
478 | } | |
479 | xfs_ichgtime(target_dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
480 | ||
481 | /* | |
482 | * Decrement the link count on the target since the target | |
483 | * dir no longer points to it. | |
484 | */ | |
485 | error = xfs_droplink(tp, target_ip); | |
486 | if (error) { | |
487 | rename_which_error_return = __LINE__; | |
488 | goto abort_return; | |
489 | } | |
490 | target_ip_dropped = 1; | |
491 | ||
492 | if (src_is_directory) { | |
493 | /* | |
494 | * Drop the link from the old "." entry. | |
495 | */ | |
496 | error = xfs_droplink(tp, target_ip); | |
497 | if (error) { | |
498 | rename_which_error_return = __LINE__; | |
499 | goto abort_return; | |
500 | } | |
501 | } | |
502 | ||
503 | /* Do this test while we still hold the locks */ | |
504 | target_link_zero = (target_ip)->i_d.di_nlink==0; | |
505 | ||
506 | } /* target_ip != NULL */ | |
507 | ||
508 | /* | |
509 | * Remove the source. | |
510 | */ | |
511 | if (new_parent && src_is_directory) { | |
512 | ||
513 | /* | |
514 | * Rewrite the ".." entry to point to the new | |
515 | * directory. | |
516 | */ | |
517 | error = XFS_DIR_REPLACE(mp, tp, src_ip, "..", 2, | |
518 | target_dp->i_ino, &first_block, | |
519 | &free_list, spaceres); | |
520 | ASSERT(error != EEXIST); | |
521 | if (error) { | |
522 | rename_which_error_return = __LINE__; | |
523 | goto abort_return; | |
524 | } | |
525 | xfs_ichgtime(src_ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
526 | ||
527 | } else { | |
528 | /* | |
529 | * We always want to hit the ctime on the source inode. | |
530 | * We do it in the if clause above for the 'new_parent && | |
531 | * src_is_directory' case, and here we get all the other | |
532 | * cases. This isn't strictly required by the standards | |
533 | * since the source inode isn't really being changed, | |
534 | * but old unix file systems did it and some incremental | |
535 | * backup programs won't work without it. | |
536 | */ | |
537 | xfs_ichgtime(src_ip, XFS_ICHGTIME_CHG); | |
538 | } | |
539 | ||
540 | /* | |
541 | * Adjust the link count on src_dp. This is necessary when | |
542 | * renaming a directory, either within one parent when | |
543 | * the target existed, or across two parent directories. | |
544 | */ | |
545 | if (src_is_directory && (new_parent || target_ip != NULL)) { | |
546 | ||
547 | /* | |
548 | * Decrement link count on src_directory since the | |
549 | * entry that's moved no longer points to it. | |
550 | */ | |
551 | error = xfs_droplink(tp, src_dp); | |
552 | if (error) { | |
553 | rename_which_error_return = __LINE__; | |
554 | goto abort_return; | |
555 | } | |
556 | } | |
557 | ||
558 | error = XFS_DIR_REMOVENAME(mp, tp, src_dp, src_name, src_namelen, | |
559 | src_ip->i_ino, &first_block, &free_list, spaceres); | |
560 | if (error) { | |
561 | rename_which_error_return = __LINE__; | |
562 | goto abort_return; | |
563 | } | |
564 | xfs_ichgtime(src_dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
565 | ||
566 | /* | |
567 | * Update the generation counts on all the directory inodes | |
568 | * that we're modifying. | |
569 | */ | |
570 | src_dp->i_gen++; | |
571 | xfs_trans_log_inode(tp, src_dp, XFS_ILOG_CORE); | |
572 | ||
573 | if (new_parent) { | |
574 | target_dp->i_gen++; | |
575 | xfs_trans_log_inode(tp, target_dp, XFS_ILOG_CORE); | |
576 | } | |
577 | ||
578 | /* | |
579 | * If there was a target inode, take an extra reference on | |
580 | * it here so that it doesn't go to xfs_inactive() from | |
581 | * within the commit. | |
582 | */ | |
583 | if (target_ip != NULL) { | |
584 | IHOLD(target_ip); | |
585 | } | |
586 | ||
587 | /* | |
588 | * If this is a synchronous mount, make sure that the | |
589 | * rename transaction goes to disk before returning to | |
590 | * the user. | |
591 | */ | |
592 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
593 | xfs_trans_set_sync(tp); | |
594 | } | |
595 | ||
596 | /* | |
597 | * Take refs. for vop_link_removed calls below. No need to worry | |
598 | * about directory refs. because the caller holds them. | |
599 | * | |
600 | * Do holds before the xfs_bmap_finish since it might rele them down | |
601 | * to zero. | |
602 | */ | |
603 | ||
604 | if (target_ip_dropped) | |
605 | IHOLD(target_ip); | |
606 | IHOLD(src_ip); | |
607 | ||
608 | error = xfs_bmap_finish(&tp, &free_list, first_block, &committed); | |
609 | if (error) { | |
610 | xfs_bmap_cancel(&free_list); | |
611 | xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES | | |
612 | XFS_TRANS_ABORT)); | |
613 | if (target_ip != NULL) { | |
614 | IRELE(target_ip); | |
615 | } | |
616 | if (target_ip_dropped) { | |
617 | IRELE(target_ip); | |
618 | } | |
619 | IRELE(src_ip); | |
620 | goto std_return; | |
621 | } | |
622 | ||
623 | /* | |
624 | * trans_commit will unlock src_ip, target_ip & decrement | |
625 | * the vnode references. | |
626 | */ | |
627 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL); | |
628 | if (target_ip != NULL) { | |
629 | xfs_refcache_purge_ip(target_ip); | |
630 | IRELE(target_ip); | |
631 | } | |
632 | /* | |
633 | * Let interposed file systems know about removed links. | |
634 | */ | |
635 | if (target_ip_dropped) { | |
636 | VOP_LINK_REMOVED(XFS_ITOV(target_ip), target_dir_vp, | |
637 | target_link_zero); | |
638 | IRELE(target_ip); | |
639 | } | |
640 | ||
641 | FSC_NOTIFY_NAME_CHANGED(XFS_ITOV(src_ip)); | |
642 | ||
643 | IRELE(src_ip); | |
644 | ||
645 | /* Fall through to std_return with error = 0 or errno from | |
646 | * xfs_trans_commit */ | |
647 | std_return: | |
648 | if (DM_EVENT_ENABLED(src_dir_vp->v_vfsp, src_dp, DM_EVENT_POSTRENAME) || | |
649 | DM_EVENT_ENABLED(target_dir_vp->v_vfsp, | |
650 | target_dp, DM_EVENT_POSTRENAME)) { | |
651 | (void) XFS_SEND_NAMESP (mp, DM_EVENT_POSTRENAME, | |
652 | src_dir_vp, DM_RIGHT_NULL, | |
653 | target_dir_vp, DM_RIGHT_NULL, | |
654 | src_name, target_name, | |
655 | 0, error, 0); | |
656 | } | |
657 | return error; | |
658 | ||
659 | abort_return: | |
660 | cancel_flags |= XFS_TRANS_ABORT; | |
661 | /* FALLTHROUGH */ | |
662 | error_return: | |
663 | xfs_bmap_cancel(&free_list); | |
664 | xfs_trans_cancel(tp, cancel_flags); | |
665 | goto std_return; | |
666 | ||
667 | rele_return: | |
668 | IRELE(src_ip); | |
669 | if (target_ip != NULL) { | |
670 | IRELE(target_ip); | |
671 | } | |
672 | goto std_return; | |
673 | } |