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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include "xfs.h" |
a844f451 | 19 | #include "xfs_fs.h" |
1da177e4 | 20 | #include "xfs_types.h" |
1da177e4 | 21 | #include "xfs_log.h" |
a844f451 | 22 | #include "xfs_inum.h" |
1da177e4 LT |
23 | #include "xfs_trans.h" |
24 | #include "xfs_sb.h" | |
25 | #include "xfs_dir.h" | |
26 | #include "xfs_dir2.h" | |
27 | #include "xfs_dmapi.h" | |
28 | #include "xfs_mount.h" | |
a844f451 | 29 | #include "xfs_da_btree.h" |
1da177e4 | 30 | #include "xfs_bmap_btree.h" |
1da177e4 LT |
31 | #include "xfs_dir_sf.h" |
32 | #include "xfs_dir2_sf.h" | |
a844f451 | 33 | #include "xfs_attr_sf.h" |
1da177e4 | 34 | #include "xfs_dinode.h" |
1da177e4 | 35 | #include "xfs_inode.h" |
a844f451 | 36 | #include "xfs_inode_item.h" |
1da177e4 LT |
37 | #include "xfs_bmap.h" |
38 | #include "xfs_error.h" | |
39 | #include "xfs_quota.h" | |
40 | #include "xfs_refcache.h" | |
41 | #include "xfs_utils.h" | |
42 | #include "xfs_trans_space.h" | |
1da177e4 LT |
43 | #include "xfs_dir_leaf.h" |
44 | ||
45 | ||
46 | /* | |
47 | * Given an array of up to 4 inode pointers, unlock the pointed to inodes. | |
48 | * If there are fewer than 4 entries in the array, the empty entries will | |
49 | * be at the end and will have NULL pointers in them. | |
50 | */ | |
51 | STATIC void | |
52 | xfs_rename_unlock4( | |
53 | xfs_inode_t **i_tab, | |
54 | uint lock_mode) | |
55 | { | |
56 | int i; | |
57 | ||
58 | xfs_iunlock(i_tab[0], lock_mode); | |
59 | for (i = 1; i < 4; i++) { | |
60 | if (i_tab[i] == NULL) { | |
61 | break; | |
62 | } | |
63 | /* | |
64 | * Watch out for duplicate entries in the table. | |
65 | */ | |
66 | if (i_tab[i] != i_tab[i-1]) { | |
67 | xfs_iunlock(i_tab[i], lock_mode); | |
68 | } | |
69 | } | |
70 | } | |
71 | ||
72 | #ifdef DEBUG | |
73 | int xfs_rename_skip, xfs_rename_nskip; | |
74 | #endif | |
75 | ||
76 | /* | |
77 | * The following routine will acquire the locks required for a rename | |
78 | * operation. The code understands the semantics of renames and will | |
79 | * validate that name1 exists under dp1 & that name2 may or may not | |
80 | * exist under dp2. | |
81 | * | |
82 | * We are renaming dp1/name1 to dp2/name2. | |
83 | * | |
84 | * Return ENOENT if dp1 does not exist, other lookup errors, or 0 for success. | |
85 | */ | |
86 | STATIC int | |
87 | xfs_lock_for_rename( | |
88 | xfs_inode_t *dp1, /* old (source) directory inode */ | |
89 | xfs_inode_t *dp2, /* new (target) directory inode */ | |
8285fb58 NS |
90 | bhv_vname_t *vname1,/* old entry name */ |
91 | bhv_vname_t *vname2,/* new entry name */ | |
1da177e4 LT |
92 | xfs_inode_t **ipp1, /* inode of old entry */ |
93 | xfs_inode_t **ipp2, /* inode of new entry, if it | |
94 | already exists, NULL otherwise. */ | |
95 | xfs_inode_t **i_tab,/* array of inode returned, sorted */ | |
96 | int *num_inodes) /* number of inodes in array */ | |
97 | { | |
98 | xfs_inode_t *ip1, *ip2, *temp; | |
99 | xfs_ino_t inum1, inum2; | |
100 | int error; | |
101 | int i, j; | |
102 | uint lock_mode; | |
103 | int diff_dirs = (dp1 != dp2); | |
104 | ||
105 | ip2 = NULL; | |
106 | ||
107 | /* | |
108 | * First, find out the current inums of the entries so that we | |
109 | * can determine the initial locking order. We'll have to | |
110 | * sanity check stuff after all the locks have been acquired | |
111 | * to see if we still have the right inodes, directories, etc. | |
112 | */ | |
113 | lock_mode = xfs_ilock_map_shared(dp1); | |
114 | error = xfs_get_dir_entry(vname1, &ip1); | |
115 | if (error) { | |
116 | xfs_iunlock_map_shared(dp1, lock_mode); | |
117 | return error; | |
118 | } | |
119 | ||
120 | inum1 = ip1->i_ino; | |
121 | ||
122 | ASSERT(ip1); | |
123 | ITRACE(ip1); | |
124 | ||
125 | /* | |
126 | * Unlock dp1 and lock dp2 if they are different. | |
127 | */ | |
128 | ||
129 | if (diff_dirs) { | |
130 | xfs_iunlock_map_shared(dp1, lock_mode); | |
131 | lock_mode = xfs_ilock_map_shared(dp2); | |
132 | } | |
133 | ||
134 | error = xfs_dir_lookup_int(XFS_ITOBHV(dp2), lock_mode, | |
135 | vname2, &inum2, &ip2); | |
136 | if (error == ENOENT) { /* target does not need to exist. */ | |
137 | inum2 = 0; | |
138 | } else if (error) { | |
139 | /* | |
140 | * If dp2 and dp1 are the same, the next line unlocks dp1. | |
141 | * Got it? | |
142 | */ | |
143 | xfs_iunlock_map_shared(dp2, lock_mode); | |
144 | IRELE (ip1); | |
145 | return error; | |
146 | } else { | |
147 | ITRACE(ip2); | |
148 | } | |
149 | ||
150 | /* | |
151 | * i_tab contains a list of pointers to inodes. We initialize | |
152 | * the table here & we'll sort it. We will then use it to | |
153 | * order the acquisition of the inode locks. | |
154 | * | |
155 | * Note that the table may contain duplicates. e.g., dp1 == dp2. | |
156 | */ | |
157 | i_tab[0] = dp1; | |
158 | i_tab[1] = dp2; | |
159 | i_tab[2] = ip1; | |
160 | if (inum2 == 0) { | |
161 | *num_inodes = 3; | |
162 | i_tab[3] = NULL; | |
163 | } else { | |
164 | *num_inodes = 4; | |
165 | i_tab[3] = ip2; | |
166 | } | |
167 | ||
168 | /* | |
169 | * Sort the elements via bubble sort. (Remember, there are at | |
170 | * most 4 elements to sort, so this is adequate.) | |
171 | */ | |
172 | for (i=0; i < *num_inodes; i++) { | |
173 | for (j=1; j < *num_inodes; j++) { | |
174 | if (i_tab[j]->i_ino < i_tab[j-1]->i_ino) { | |
175 | temp = i_tab[j]; | |
176 | i_tab[j] = i_tab[j-1]; | |
177 | i_tab[j-1] = temp; | |
178 | } | |
179 | } | |
180 | } | |
181 | ||
182 | /* | |
183 | * We have dp2 locked. If it isn't first, unlock it. | |
184 | * If it is first, tell xfs_lock_inodes so it can skip it | |
185 | * when locking. if dp1 == dp2, xfs_lock_inodes will skip both | |
186 | * since they are equal. xfs_lock_inodes needs all these inodes | |
187 | * so that it can unlock and retry if there might be a dead-lock | |
188 | * potential with the log. | |
189 | */ | |
190 | ||
191 | if (i_tab[0] == dp2 && lock_mode == XFS_ILOCK_SHARED) { | |
192 | #ifdef DEBUG | |
193 | xfs_rename_skip++; | |
194 | #endif | |
195 | xfs_lock_inodes(i_tab, *num_inodes, 1, XFS_ILOCK_SHARED); | |
196 | } else { | |
197 | #ifdef DEBUG | |
198 | xfs_rename_nskip++; | |
199 | #endif | |
200 | xfs_iunlock_map_shared(dp2, lock_mode); | |
201 | xfs_lock_inodes(i_tab, *num_inodes, 0, XFS_ILOCK_SHARED); | |
202 | } | |
203 | ||
204 | /* | |
205 | * Set the return value. Null out any unused entries in i_tab. | |
206 | */ | |
207 | *ipp1 = *ipp2 = NULL; | |
208 | for (i=0; i < *num_inodes; i++) { | |
209 | if (i_tab[i]->i_ino == inum1) { | |
210 | *ipp1 = i_tab[i]; | |
211 | } | |
212 | if (i_tab[i]->i_ino == inum2) { | |
213 | *ipp2 = i_tab[i]; | |
214 | } | |
215 | } | |
216 | for (;i < 4; i++) { | |
217 | i_tab[i] = NULL; | |
218 | } | |
219 | return 0; | |
220 | } | |
221 | ||
1da177e4 LT |
222 | /* |
223 | * xfs_rename | |
224 | */ | |
225 | int | |
226 | xfs_rename( | |
227 | bhv_desc_t *src_dir_bdp, | |
8285fb58 | 228 | bhv_vname_t *src_vname, |
67fcaa73 | 229 | bhv_vnode_t *target_dir_vp, |
8285fb58 | 230 | bhv_vname_t *target_vname, |
1da177e4 LT |
231 | cred_t *credp) |
232 | { | |
233 | xfs_trans_t *tp; | |
234 | xfs_inode_t *src_dp, *target_dp, *src_ip, *target_ip; | |
235 | xfs_mount_t *mp; | |
236 | int new_parent; /* moving to a new dir */ | |
237 | int src_is_directory; /* src_name is a directory */ | |
238 | int error; | |
239 | xfs_bmap_free_t free_list; | |
240 | xfs_fsblock_t first_block; | |
241 | int cancel_flags; | |
242 | int committed; | |
243 | xfs_inode_t *inodes[4]; | |
244 | int target_ip_dropped = 0; /* dropped target_ip link? */ | |
67fcaa73 | 245 | bhv_vnode_t *src_dir_vp; |
1da177e4 LT |
246 | int spaceres; |
247 | int target_link_zero = 0; | |
248 | int num_inodes; | |
249 | char *src_name = VNAME(src_vname); | |
250 | char *target_name = VNAME(target_vname); | |
251 | int src_namelen = VNAMELEN(src_vname); | |
252 | int target_namelen = VNAMELEN(target_vname); | |
253 | ||
254 | src_dir_vp = BHV_TO_VNODE(src_dir_bdp); | |
255 | vn_trace_entry(src_dir_vp, "xfs_rename", (inst_t *)__return_address); | |
256 | vn_trace_entry(target_dir_vp, "xfs_rename", (inst_t *)__return_address); | |
257 | ||
258 | /* | |
259 | * Find the XFS behavior descriptor for the target directory | |
260 | * vnode since it was not handed to us. | |
261 | */ | |
75e17b3c CH |
262 | target_dp = xfs_vtoi(target_dir_vp); |
263 | if (target_dp == NULL) { | |
1da177e4 LT |
264 | return XFS_ERROR(EXDEV); |
265 | } | |
266 | ||
267 | src_dp = XFS_BHVTOI(src_dir_bdp); | |
1da177e4 LT |
268 | mp = src_dp->i_mount; |
269 | ||
270 | if (DM_EVENT_ENABLED(src_dir_vp->v_vfsp, src_dp, DM_EVENT_RENAME) || | |
271 | DM_EVENT_ENABLED(target_dir_vp->v_vfsp, | |
272 | target_dp, DM_EVENT_RENAME)) { | |
273 | error = XFS_SEND_NAMESP(mp, DM_EVENT_RENAME, | |
274 | src_dir_vp, DM_RIGHT_NULL, | |
275 | target_dir_vp, DM_RIGHT_NULL, | |
276 | src_name, target_name, | |
277 | 0, 0, 0); | |
278 | if (error) { | |
279 | return error; | |
280 | } | |
281 | } | |
282 | /* Return through std_return after this point. */ | |
283 | ||
284 | /* | |
285 | * Lock all the participating inodes. Depending upon whether | |
286 | * the target_name exists in the target directory, and | |
287 | * whether the target directory is the same as the source | |
288 | * directory, we can lock from 2 to 4 inodes. | |
289 | * xfs_lock_for_rename() will return ENOENT if src_name | |
290 | * does not exist in the source directory. | |
291 | */ | |
292 | tp = NULL; | |
293 | error = xfs_lock_for_rename(src_dp, target_dp, src_vname, | |
294 | target_vname, &src_ip, &target_ip, inodes, | |
295 | &num_inodes); | |
296 | ||
297 | if (error) { | |
1da177e4 LT |
298 | /* |
299 | * We have nothing locked, no inode references, and | |
300 | * no transaction, so just get out. | |
301 | */ | |
302 | goto std_return; | |
303 | } | |
304 | ||
305 | ASSERT(src_ip != NULL); | |
306 | ||
307 | if ((src_ip->i_d.di_mode & S_IFMT) == S_IFDIR) { | |
308 | /* | |
309 | * Check for link count overflow on target_dp | |
310 | */ | |
311 | if (target_ip == NULL && (src_dp != target_dp) && | |
312 | target_dp->i_d.di_nlink >= XFS_MAXLINK) { | |
1da177e4 LT |
313 | error = XFS_ERROR(EMLINK); |
314 | xfs_rename_unlock4(inodes, XFS_ILOCK_SHARED); | |
315 | goto rele_return; | |
316 | } | |
317 | } | |
318 | ||
b1ecdda9 NS |
319 | /* |
320 | * If we are using project inheritance, we only allow renames | |
321 | * into our tree when the project IDs are the same; else the | |
322 | * tree quota mechanism would be circumvented. | |
323 | */ | |
324 | if (unlikely((target_dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && | |
325 | (target_dp->i_d.di_projid != src_ip->i_d.di_projid))) { | |
326 | error = XFS_ERROR(EXDEV); | |
327 | xfs_rename_unlock4(inodes, XFS_ILOCK_SHARED); | |
328 | goto rele_return; | |
329 | } | |
330 | ||
1da177e4 LT |
331 | new_parent = (src_dp != target_dp); |
332 | src_is_directory = ((src_ip->i_d.di_mode & S_IFMT) == S_IFDIR); | |
333 | ||
334 | /* | |
335 | * Drop the locks on our inodes so that we can start the transaction. | |
336 | */ | |
337 | xfs_rename_unlock4(inodes, XFS_ILOCK_SHARED); | |
338 | ||
339 | XFS_BMAP_INIT(&free_list, &first_block); | |
340 | tp = xfs_trans_alloc(mp, XFS_TRANS_RENAME); | |
341 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
342 | spaceres = XFS_RENAME_SPACE_RES(mp, target_namelen); | |
343 | error = xfs_trans_reserve(tp, spaceres, XFS_RENAME_LOG_RES(mp), 0, | |
344 | XFS_TRANS_PERM_LOG_RES, XFS_RENAME_LOG_COUNT); | |
345 | if (error == ENOSPC) { | |
346 | spaceres = 0; | |
347 | error = xfs_trans_reserve(tp, 0, XFS_RENAME_LOG_RES(mp), 0, | |
348 | XFS_TRANS_PERM_LOG_RES, XFS_RENAME_LOG_COUNT); | |
349 | } | |
350 | if (error) { | |
1da177e4 LT |
351 | xfs_trans_cancel(tp, 0); |
352 | goto rele_return; | |
353 | } | |
354 | ||
355 | /* | |
356 | * Attach the dquots to the inodes | |
357 | */ | |
358 | if ((error = XFS_QM_DQVOPRENAME(mp, inodes))) { | |
359 | xfs_trans_cancel(tp, cancel_flags); | |
1da177e4 LT |
360 | goto rele_return; |
361 | } | |
362 | ||
363 | /* | |
364 | * Reacquire the inode locks we dropped above. | |
365 | */ | |
366 | xfs_lock_inodes(inodes, num_inodes, 0, XFS_ILOCK_EXCL); | |
367 | ||
368 | /* | |
369 | * Join all the inodes to the transaction. From this point on, | |
370 | * we can rely on either trans_commit or trans_cancel to unlock | |
371 | * them. Note that we need to add a vnode reference to the | |
372 | * directories since trans_commit & trans_cancel will decrement | |
373 | * them when they unlock the inodes. Also, we need to be careful | |
374 | * not to add an inode to the transaction more than once. | |
375 | */ | |
376 | VN_HOLD(src_dir_vp); | |
377 | xfs_trans_ijoin(tp, src_dp, XFS_ILOCK_EXCL); | |
378 | if (new_parent) { | |
379 | VN_HOLD(target_dir_vp); | |
380 | xfs_trans_ijoin(tp, target_dp, XFS_ILOCK_EXCL); | |
381 | } | |
382 | if ((src_ip != src_dp) && (src_ip != target_dp)) { | |
383 | xfs_trans_ijoin(tp, src_ip, XFS_ILOCK_EXCL); | |
384 | } | |
385 | if ((target_ip != NULL) && | |
386 | (target_ip != src_ip) && | |
387 | (target_ip != src_dp) && | |
388 | (target_ip != target_dp)) { | |
389 | xfs_trans_ijoin(tp, target_ip, XFS_ILOCK_EXCL); | |
390 | } | |
391 | ||
392 | /* | |
393 | * Set up the target. | |
394 | */ | |
395 | if (target_ip == NULL) { | |
396 | /* | |
397 | * If there's no space reservation, check the entry will | |
398 | * fit before actually inserting it. | |
399 | */ | |
400 | if (spaceres == 0 && | |
401 | (error = XFS_DIR_CANENTER(mp, tp, target_dp, target_name, | |
402 | target_namelen))) { | |
1da177e4 LT |
403 | goto error_return; |
404 | } | |
405 | /* | |
406 | * If target does not exist and the rename crosses | |
407 | * directories, adjust the target directory link count | |
408 | * to account for the ".." reference from the new entry. | |
409 | */ | |
410 | error = XFS_DIR_CREATENAME(mp, tp, target_dp, target_name, | |
411 | target_namelen, src_ip->i_ino, | |
412 | &first_block, &free_list, spaceres); | |
413 | if (error == ENOSPC) { | |
1da177e4 LT |
414 | goto error_return; |
415 | } | |
416 | if (error) { | |
1da177e4 LT |
417 | goto abort_return; |
418 | } | |
419 | xfs_ichgtime(target_dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
420 | ||
421 | if (new_parent && src_is_directory) { | |
422 | error = xfs_bumplink(tp, target_dp); | |
423 | if (error) { | |
1da177e4 LT |
424 | goto abort_return; |
425 | } | |
426 | } | |
427 | } else { /* target_ip != NULL */ | |
428 | ||
429 | /* | |
430 | * If target exists and it's a directory, check that both | |
431 | * target and source are directories and that target can be | |
432 | * destroyed, or that neither is a directory. | |
433 | */ | |
434 | if ((target_ip->i_d.di_mode & S_IFMT) == S_IFDIR) { | |
435 | /* | |
436 | * Make sure target dir is empty. | |
437 | */ | |
438 | if (!(XFS_DIR_ISEMPTY(target_ip->i_mount, target_ip)) || | |
439 | (target_ip->i_d.di_nlink > 2)) { | |
440 | error = XFS_ERROR(EEXIST); | |
1da177e4 LT |
441 | goto error_return; |
442 | } | |
443 | } | |
444 | ||
445 | /* | |
446 | * Link the source inode under the target name. | |
447 | * If the source inode is a directory and we are moving | |
448 | * it across directories, its ".." entry will be | |
449 | * inconsistent until we replace that down below. | |
450 | * | |
451 | * In case there is already an entry with the same | |
452 | * name at the destination directory, remove it first. | |
453 | */ | |
454 | error = XFS_DIR_REPLACE(mp, tp, target_dp, target_name, | |
455 | target_namelen, src_ip->i_ino, &first_block, | |
456 | &free_list, spaceres); | |
457 | if (error) { | |
1da177e4 LT |
458 | goto abort_return; |
459 | } | |
460 | xfs_ichgtime(target_dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
461 | ||
462 | /* | |
463 | * Decrement the link count on the target since the target | |
464 | * dir no longer points to it. | |
465 | */ | |
466 | error = xfs_droplink(tp, target_ip); | |
467 | if (error) { | |
1da177e4 LT |
468 | goto abort_return; |
469 | } | |
470 | target_ip_dropped = 1; | |
471 | ||
472 | if (src_is_directory) { | |
473 | /* | |
474 | * Drop the link from the old "." entry. | |
475 | */ | |
476 | error = xfs_droplink(tp, target_ip); | |
477 | if (error) { | |
1da177e4 LT |
478 | goto abort_return; |
479 | } | |
480 | } | |
481 | ||
482 | /* Do this test while we still hold the locks */ | |
483 | target_link_zero = (target_ip)->i_d.di_nlink==0; | |
484 | ||
485 | } /* target_ip != NULL */ | |
486 | ||
487 | /* | |
488 | * Remove the source. | |
489 | */ | |
490 | if (new_parent && src_is_directory) { | |
491 | ||
492 | /* | |
493 | * Rewrite the ".." entry to point to the new | |
494 | * directory. | |
495 | */ | |
496 | error = XFS_DIR_REPLACE(mp, tp, src_ip, "..", 2, | |
497 | target_dp->i_ino, &first_block, | |
498 | &free_list, spaceres); | |
499 | ASSERT(error != EEXIST); | |
500 | if (error) { | |
1da177e4 LT |
501 | goto abort_return; |
502 | } | |
503 | xfs_ichgtime(src_ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
504 | ||
505 | } else { | |
506 | /* | |
507 | * We always want to hit the ctime on the source inode. | |
508 | * We do it in the if clause above for the 'new_parent && | |
509 | * src_is_directory' case, and here we get all the other | |
510 | * cases. This isn't strictly required by the standards | |
511 | * since the source inode isn't really being changed, | |
512 | * but old unix file systems did it and some incremental | |
513 | * backup programs won't work without it. | |
514 | */ | |
515 | xfs_ichgtime(src_ip, XFS_ICHGTIME_CHG); | |
516 | } | |
517 | ||
518 | /* | |
519 | * Adjust the link count on src_dp. This is necessary when | |
520 | * renaming a directory, either within one parent when | |
521 | * the target existed, or across two parent directories. | |
522 | */ | |
523 | if (src_is_directory && (new_parent || target_ip != NULL)) { | |
524 | ||
525 | /* | |
526 | * Decrement link count on src_directory since the | |
527 | * entry that's moved no longer points to it. | |
528 | */ | |
529 | error = xfs_droplink(tp, src_dp); | |
530 | if (error) { | |
1da177e4 LT |
531 | goto abort_return; |
532 | } | |
533 | } | |
534 | ||
535 | error = XFS_DIR_REMOVENAME(mp, tp, src_dp, src_name, src_namelen, | |
536 | src_ip->i_ino, &first_block, &free_list, spaceres); | |
537 | if (error) { | |
1da177e4 LT |
538 | goto abort_return; |
539 | } | |
540 | xfs_ichgtime(src_dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
541 | ||
542 | /* | |
543 | * Update the generation counts on all the directory inodes | |
544 | * that we're modifying. | |
545 | */ | |
546 | src_dp->i_gen++; | |
547 | xfs_trans_log_inode(tp, src_dp, XFS_ILOG_CORE); | |
548 | ||
549 | if (new_parent) { | |
550 | target_dp->i_gen++; | |
551 | xfs_trans_log_inode(tp, target_dp, XFS_ILOG_CORE); | |
552 | } | |
553 | ||
554 | /* | |
555 | * If there was a target inode, take an extra reference on | |
556 | * it here so that it doesn't go to xfs_inactive() from | |
557 | * within the commit. | |
558 | */ | |
559 | if (target_ip != NULL) { | |
560 | IHOLD(target_ip); | |
561 | } | |
562 | ||
563 | /* | |
564 | * If this is a synchronous mount, make sure that the | |
565 | * rename transaction goes to disk before returning to | |
566 | * the user. | |
567 | */ | |
568 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
569 | xfs_trans_set_sync(tp); | |
570 | } | |
571 | ||
572 | /* | |
573 | * Take refs. for vop_link_removed calls below. No need to worry | |
574 | * about directory refs. because the caller holds them. | |
575 | * | |
576 | * Do holds before the xfs_bmap_finish since it might rele them down | |
577 | * to zero. | |
578 | */ | |
579 | ||
580 | if (target_ip_dropped) | |
581 | IHOLD(target_ip); | |
582 | IHOLD(src_ip); | |
583 | ||
584 | error = xfs_bmap_finish(&tp, &free_list, first_block, &committed); | |
585 | if (error) { | |
586 | xfs_bmap_cancel(&free_list); | |
587 | xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES | | |
588 | XFS_TRANS_ABORT)); | |
589 | if (target_ip != NULL) { | |
590 | IRELE(target_ip); | |
591 | } | |
592 | if (target_ip_dropped) { | |
593 | IRELE(target_ip); | |
594 | } | |
595 | IRELE(src_ip); | |
596 | goto std_return; | |
597 | } | |
598 | ||
599 | /* | |
600 | * trans_commit will unlock src_ip, target_ip & decrement | |
601 | * the vnode references. | |
602 | */ | |
603 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL); | |
604 | if (target_ip != NULL) { | |
605 | xfs_refcache_purge_ip(target_ip); | |
606 | IRELE(target_ip); | |
607 | } | |
608 | /* | |
609 | * Let interposed file systems know about removed links. | |
610 | */ | |
611 | if (target_ip_dropped) { | |
67fcaa73 | 612 | bhv_vop_link_removed(XFS_ITOV(target_ip), target_dir_vp, |
1da177e4 LT |
613 | target_link_zero); |
614 | IRELE(target_ip); | |
615 | } | |
616 | ||
1da177e4 LT |
617 | IRELE(src_ip); |
618 | ||
619 | /* Fall through to std_return with error = 0 or errno from | |
620 | * xfs_trans_commit */ | |
621 | std_return: | |
622 | if (DM_EVENT_ENABLED(src_dir_vp->v_vfsp, src_dp, DM_EVENT_POSTRENAME) || | |
623 | DM_EVENT_ENABLED(target_dir_vp->v_vfsp, | |
624 | target_dp, DM_EVENT_POSTRENAME)) { | |
625 | (void) XFS_SEND_NAMESP (mp, DM_EVENT_POSTRENAME, | |
626 | src_dir_vp, DM_RIGHT_NULL, | |
627 | target_dir_vp, DM_RIGHT_NULL, | |
628 | src_name, target_name, | |
629 | 0, error, 0); | |
630 | } | |
631 | return error; | |
632 | ||
633 | abort_return: | |
634 | cancel_flags |= XFS_TRANS_ABORT; | |
635 | /* FALLTHROUGH */ | |
636 | error_return: | |
637 | xfs_bmap_cancel(&free_list); | |
638 | xfs_trans_cancel(tp, cancel_flags); | |
639 | goto std_return; | |
640 | ||
641 | rele_return: | |
642 | IRELE(src_ip); | |
643 | if (target_ip != NULL) { | |
644 | IRELE(target_ip); | |
645 | } | |
646 | goto std_return; | |
647 | } |