Commit | Line | Data |
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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" | |
da353b0d | 25 | #include "xfs_ag.h" |
1da177e4 LT |
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 | 31 | #include "xfs_dir2_sf.h" |
a844f451 | 32 | #include "xfs_attr_sf.h" |
1da177e4 | 33 | #include "xfs_dinode.h" |
1da177e4 | 34 | #include "xfs_inode.h" |
a844f451 | 35 | #include "xfs_inode_item.h" |
1da177e4 LT |
36 | #include "xfs_bmap.h" |
37 | #include "xfs_error.h" | |
38 | #include "xfs_quota.h" | |
39 | #include "xfs_refcache.h" | |
40 | #include "xfs_utils.h" | |
41 | #include "xfs_trans_space.h" | |
a8272ce0 | 42 | #include "xfs_vnodeops.h" |
1da177e4 LT |
43 | |
44 | ||
45 | /* | |
46 | * Given an array of up to 4 inode pointers, unlock the pointed to inodes. | |
47 | * If there are fewer than 4 entries in the array, the empty entries will | |
48 | * be at the end and will have NULL pointers in them. | |
49 | */ | |
50 | STATIC void | |
51 | xfs_rename_unlock4( | |
52 | xfs_inode_t **i_tab, | |
53 | uint lock_mode) | |
54 | { | |
55 | int i; | |
56 | ||
57 | xfs_iunlock(i_tab[0], lock_mode); | |
58 | for (i = 1; i < 4; i++) { | |
59 | if (i_tab[i] == NULL) { | |
60 | break; | |
61 | } | |
62 | /* | |
63 | * Watch out for duplicate entries in the table. | |
64 | */ | |
65 | if (i_tab[i] != i_tab[i-1]) { | |
66 | xfs_iunlock(i_tab[i], lock_mode); | |
67 | } | |
68 | } | |
69 | } | |
70 | ||
71 | #ifdef DEBUG | |
72 | int xfs_rename_skip, xfs_rename_nskip; | |
73 | #endif | |
74 | ||
75 | /* | |
76 | * The following routine will acquire the locks required for a rename | |
77 | * operation. The code understands the semantics of renames and will | |
78 | * validate that name1 exists under dp1 & that name2 may or may not | |
79 | * exist under dp2. | |
80 | * | |
81 | * We are renaming dp1/name1 to dp2/name2. | |
82 | * | |
83 | * Return ENOENT if dp1 does not exist, other lookup errors, or 0 for success. | |
84 | */ | |
85 | STATIC int | |
86 | xfs_lock_for_rename( | |
87 | xfs_inode_t *dp1, /* old (source) directory inode */ | |
88 | xfs_inode_t *dp2, /* new (target) directory inode */ | |
8285fb58 NS |
89 | bhv_vname_t *vname1,/* old entry name */ |
90 | bhv_vname_t *vname2,/* new entry name */ | |
1da177e4 LT |
91 | xfs_inode_t **ipp1, /* inode of old entry */ |
92 | xfs_inode_t **ipp2, /* inode of new entry, if it | |
93 | already exists, NULL otherwise. */ | |
94 | xfs_inode_t **i_tab,/* array of inode returned, sorted */ | |
95 | int *num_inodes) /* number of inodes in array */ | |
96 | { | |
97 | xfs_inode_t *ip1, *ip2, *temp; | |
98 | xfs_ino_t inum1, inum2; | |
99 | int error; | |
100 | int i, j; | |
101 | uint lock_mode; | |
102 | int diff_dirs = (dp1 != dp2); | |
103 | ||
104 | ip2 = NULL; | |
105 | ||
106 | /* | |
107 | * First, find out the current inums of the entries so that we | |
108 | * can determine the initial locking order. We'll have to | |
109 | * sanity check stuff after all the locks have been acquired | |
110 | * to see if we still have the right inodes, directories, etc. | |
111 | */ | |
112 | lock_mode = xfs_ilock_map_shared(dp1); | |
113 | error = xfs_get_dir_entry(vname1, &ip1); | |
114 | if (error) { | |
115 | xfs_iunlock_map_shared(dp1, lock_mode); | |
116 | return error; | |
117 | } | |
118 | ||
119 | inum1 = ip1->i_ino; | |
120 | ||
121 | ASSERT(ip1); | |
cf441eeb | 122 | xfs_itrace_ref(ip1); |
1da177e4 LT |
123 | |
124 | /* | |
125 | * Unlock dp1 and lock dp2 if they are different. | |
126 | */ | |
127 | ||
128 | if (diff_dirs) { | |
129 | xfs_iunlock_map_shared(dp1, lock_mode); | |
130 | lock_mode = xfs_ilock_map_shared(dp2); | |
131 | } | |
132 | ||
993386c1 | 133 | error = xfs_dir_lookup_int(dp2, lock_mode, vname2, &inum2, &ip2); |
1da177e4 LT |
134 | if (error == ENOENT) { /* target does not need to exist. */ |
135 | inum2 = 0; | |
136 | } else if (error) { | |
137 | /* | |
138 | * If dp2 and dp1 are the same, the next line unlocks dp1. | |
139 | * Got it? | |
140 | */ | |
141 | xfs_iunlock_map_shared(dp2, lock_mode); | |
142 | IRELE (ip1); | |
143 | return error; | |
144 | } else { | |
cf441eeb | 145 | xfs_itrace_ref(ip2); |
1da177e4 LT |
146 | } |
147 | ||
148 | /* | |
149 | * i_tab contains a list of pointers to inodes. We initialize | |
150 | * the table here & we'll sort it. We will then use it to | |
151 | * order the acquisition of the inode locks. | |
152 | * | |
153 | * Note that the table may contain duplicates. e.g., dp1 == dp2. | |
154 | */ | |
155 | i_tab[0] = dp1; | |
156 | i_tab[1] = dp2; | |
157 | i_tab[2] = ip1; | |
158 | if (inum2 == 0) { | |
159 | *num_inodes = 3; | |
160 | i_tab[3] = NULL; | |
161 | } else { | |
162 | *num_inodes = 4; | |
163 | i_tab[3] = ip2; | |
164 | } | |
165 | ||
166 | /* | |
167 | * Sort the elements via bubble sort. (Remember, there are at | |
168 | * most 4 elements to sort, so this is adequate.) | |
169 | */ | |
170 | for (i=0; i < *num_inodes; i++) { | |
171 | for (j=1; j < *num_inodes; j++) { | |
172 | if (i_tab[j]->i_ino < i_tab[j-1]->i_ino) { | |
173 | temp = i_tab[j]; | |
174 | i_tab[j] = i_tab[j-1]; | |
175 | i_tab[j-1] = temp; | |
176 | } | |
177 | } | |
178 | } | |
179 | ||
180 | /* | |
181 | * We have dp2 locked. If it isn't first, unlock it. | |
182 | * If it is first, tell xfs_lock_inodes so it can skip it | |
183 | * when locking. if dp1 == dp2, xfs_lock_inodes will skip both | |
184 | * since they are equal. xfs_lock_inodes needs all these inodes | |
185 | * so that it can unlock and retry if there might be a dead-lock | |
186 | * potential with the log. | |
187 | */ | |
188 | ||
189 | if (i_tab[0] == dp2 && lock_mode == XFS_ILOCK_SHARED) { | |
190 | #ifdef DEBUG | |
191 | xfs_rename_skip++; | |
192 | #endif | |
193 | xfs_lock_inodes(i_tab, *num_inodes, 1, XFS_ILOCK_SHARED); | |
194 | } else { | |
195 | #ifdef DEBUG | |
196 | xfs_rename_nskip++; | |
197 | #endif | |
198 | xfs_iunlock_map_shared(dp2, lock_mode); | |
199 | xfs_lock_inodes(i_tab, *num_inodes, 0, XFS_ILOCK_SHARED); | |
200 | } | |
201 | ||
202 | /* | |
203 | * Set the return value. Null out any unused entries in i_tab. | |
204 | */ | |
205 | *ipp1 = *ipp2 = NULL; | |
206 | for (i=0; i < *num_inodes; i++) { | |
207 | if (i_tab[i]->i_ino == inum1) { | |
208 | *ipp1 = i_tab[i]; | |
209 | } | |
210 | if (i_tab[i]->i_ino == inum2) { | |
211 | *ipp2 = i_tab[i]; | |
212 | } | |
213 | } | |
214 | for (;i < 4; i++) { | |
215 | i_tab[i] = NULL; | |
216 | } | |
217 | return 0; | |
218 | } | |
219 | ||
1da177e4 LT |
220 | /* |
221 | * xfs_rename | |
222 | */ | |
223 | int | |
224 | xfs_rename( | |
993386c1 | 225 | xfs_inode_t *src_dp, |
8285fb58 | 226 | bhv_vname_t *src_vname, |
67fcaa73 | 227 | bhv_vnode_t *target_dir_vp, |
993386c1 | 228 | bhv_vname_t *target_vname) |
1da177e4 | 229 | { |
993386c1 | 230 | bhv_vnode_t *src_dir_vp = XFS_ITOV(src_dp); |
1da177e4 | 231 | xfs_trans_t *tp; |
993386c1 CH |
232 | xfs_inode_t *target_dp, *src_ip, *target_ip; |
233 | xfs_mount_t *mp = src_dp->i_mount; | |
1da177e4 LT |
234 | int new_parent; /* moving to a new dir */ |
235 | int src_is_directory; /* src_name is a directory */ | |
236 | int error; | |
237 | xfs_bmap_free_t free_list; | |
238 | xfs_fsblock_t first_block; | |
239 | int cancel_flags; | |
240 | int committed; | |
241 | xfs_inode_t *inodes[4]; | |
242 | int target_ip_dropped = 0; /* dropped target_ip link? */ | |
1da177e4 LT |
243 | int spaceres; |
244 | int target_link_zero = 0; | |
245 | int num_inodes; | |
246 | char *src_name = VNAME(src_vname); | |
247 | char *target_name = VNAME(target_vname); | |
248 | int src_namelen = VNAMELEN(src_vname); | |
249 | int target_namelen = VNAMELEN(target_vname); | |
250 | ||
cf441eeb LM |
251 | xfs_itrace_entry(src_dp); |
252 | xfs_itrace_entry(xfs_vtoi(target_dir_vp)); | |
1da177e4 LT |
253 | |
254 | /* | |
255 | * Find the XFS behavior descriptor for the target directory | |
256 | * vnode since it was not handed to us. | |
257 | */ | |
75e17b3c CH |
258 | target_dp = xfs_vtoi(target_dir_vp); |
259 | if (target_dp == NULL) { | |
1da177e4 LT |
260 | return XFS_ERROR(EXDEV); |
261 | } | |
262 | ||
eb9df39d CH |
263 | if (DM_EVENT_ENABLED(src_dp, DM_EVENT_RENAME) || |
264 | DM_EVENT_ENABLED(target_dp, DM_EVENT_RENAME)) { | |
1da177e4 LT |
265 | error = XFS_SEND_NAMESP(mp, DM_EVENT_RENAME, |
266 | src_dir_vp, DM_RIGHT_NULL, | |
267 | target_dir_vp, DM_RIGHT_NULL, | |
268 | src_name, target_name, | |
269 | 0, 0, 0); | |
270 | if (error) { | |
271 | return error; | |
272 | } | |
273 | } | |
274 | /* Return through std_return after this point. */ | |
275 | ||
276 | /* | |
277 | * Lock all the participating inodes. Depending upon whether | |
278 | * the target_name exists in the target directory, and | |
279 | * whether the target directory is the same as the source | |
280 | * directory, we can lock from 2 to 4 inodes. | |
281 | * xfs_lock_for_rename() will return ENOENT if src_name | |
282 | * does not exist in the source directory. | |
283 | */ | |
284 | tp = NULL; | |
285 | error = xfs_lock_for_rename(src_dp, target_dp, src_vname, | |
286 | target_vname, &src_ip, &target_ip, inodes, | |
287 | &num_inodes); | |
288 | ||
289 | if (error) { | |
1da177e4 LT |
290 | /* |
291 | * We have nothing locked, no inode references, and | |
292 | * no transaction, so just get out. | |
293 | */ | |
294 | goto std_return; | |
295 | } | |
296 | ||
297 | ASSERT(src_ip != NULL); | |
298 | ||
299 | if ((src_ip->i_d.di_mode & S_IFMT) == S_IFDIR) { | |
300 | /* | |
301 | * Check for link count overflow on target_dp | |
302 | */ | |
303 | if (target_ip == NULL && (src_dp != target_dp) && | |
304 | target_dp->i_d.di_nlink >= XFS_MAXLINK) { | |
1da177e4 LT |
305 | error = XFS_ERROR(EMLINK); |
306 | xfs_rename_unlock4(inodes, XFS_ILOCK_SHARED); | |
307 | goto rele_return; | |
308 | } | |
309 | } | |
310 | ||
b1ecdda9 NS |
311 | /* |
312 | * If we are using project inheritance, we only allow renames | |
313 | * into our tree when the project IDs are the same; else the | |
314 | * tree quota mechanism would be circumvented. | |
315 | */ | |
316 | if (unlikely((target_dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && | |
317 | (target_dp->i_d.di_projid != src_ip->i_d.di_projid))) { | |
318 | error = XFS_ERROR(EXDEV); | |
319 | xfs_rename_unlock4(inodes, XFS_ILOCK_SHARED); | |
320 | goto rele_return; | |
321 | } | |
322 | ||
1da177e4 LT |
323 | new_parent = (src_dp != target_dp); |
324 | src_is_directory = ((src_ip->i_d.di_mode & S_IFMT) == S_IFDIR); | |
325 | ||
326 | /* | |
327 | * Drop the locks on our inodes so that we can start the transaction. | |
328 | */ | |
329 | xfs_rename_unlock4(inodes, XFS_ILOCK_SHARED); | |
330 | ||
331 | XFS_BMAP_INIT(&free_list, &first_block); | |
332 | tp = xfs_trans_alloc(mp, XFS_TRANS_RENAME); | |
333 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
334 | spaceres = XFS_RENAME_SPACE_RES(mp, target_namelen); | |
335 | error = xfs_trans_reserve(tp, spaceres, XFS_RENAME_LOG_RES(mp), 0, | |
336 | XFS_TRANS_PERM_LOG_RES, XFS_RENAME_LOG_COUNT); | |
337 | if (error == ENOSPC) { | |
338 | spaceres = 0; | |
339 | error = xfs_trans_reserve(tp, 0, XFS_RENAME_LOG_RES(mp), 0, | |
340 | XFS_TRANS_PERM_LOG_RES, XFS_RENAME_LOG_COUNT); | |
341 | } | |
342 | if (error) { | |
1da177e4 LT |
343 | xfs_trans_cancel(tp, 0); |
344 | goto rele_return; | |
345 | } | |
346 | ||
347 | /* | |
348 | * Attach the dquots to the inodes | |
349 | */ | |
350 | if ((error = XFS_QM_DQVOPRENAME(mp, inodes))) { | |
351 | xfs_trans_cancel(tp, cancel_flags); | |
1da177e4 LT |
352 | goto rele_return; |
353 | } | |
354 | ||
355 | /* | |
356 | * Reacquire the inode locks we dropped above. | |
357 | */ | |
358 | xfs_lock_inodes(inodes, num_inodes, 0, XFS_ILOCK_EXCL); | |
359 | ||
360 | /* | |
361 | * Join all the inodes to the transaction. From this point on, | |
362 | * we can rely on either trans_commit or trans_cancel to unlock | |
363 | * them. Note that we need to add a vnode reference to the | |
364 | * directories since trans_commit & trans_cancel will decrement | |
365 | * them when they unlock the inodes. Also, we need to be careful | |
366 | * not to add an inode to the transaction more than once. | |
367 | */ | |
368 | VN_HOLD(src_dir_vp); | |
369 | xfs_trans_ijoin(tp, src_dp, XFS_ILOCK_EXCL); | |
370 | if (new_parent) { | |
371 | VN_HOLD(target_dir_vp); | |
372 | xfs_trans_ijoin(tp, target_dp, XFS_ILOCK_EXCL); | |
373 | } | |
374 | if ((src_ip != src_dp) && (src_ip != target_dp)) { | |
375 | xfs_trans_ijoin(tp, src_ip, XFS_ILOCK_EXCL); | |
376 | } | |
377 | if ((target_ip != NULL) && | |
378 | (target_ip != src_ip) && | |
379 | (target_ip != src_dp) && | |
380 | (target_ip != target_dp)) { | |
381 | xfs_trans_ijoin(tp, target_ip, XFS_ILOCK_EXCL); | |
382 | } | |
383 | ||
384 | /* | |
385 | * Set up the target. | |
386 | */ | |
387 | if (target_ip == NULL) { | |
388 | /* | |
389 | * If there's no space reservation, check the entry will | |
390 | * fit before actually inserting it. | |
391 | */ | |
392 | if (spaceres == 0 && | |
f6c2d1fa NS |
393 | (error = xfs_dir_canenter(tp, target_dp, target_name, |
394 | target_namelen))) | |
1da177e4 | 395 | goto error_return; |
1da177e4 LT |
396 | /* |
397 | * If target does not exist and the rename crosses | |
398 | * directories, adjust the target directory link count | |
399 | * to account for the ".." reference from the new entry. | |
400 | */ | |
f6c2d1fa | 401 | error = xfs_dir_createname(tp, target_dp, target_name, |
1da177e4 LT |
402 | target_namelen, src_ip->i_ino, |
403 | &first_block, &free_list, spaceres); | |
f6c2d1fa | 404 | if (error == ENOSPC) |
1da177e4 | 405 | goto error_return; |
f6c2d1fa | 406 | if (error) |
1da177e4 | 407 | goto abort_return; |
1da177e4 LT |
408 | xfs_ichgtime(target_dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
409 | ||
410 | if (new_parent && src_is_directory) { | |
411 | error = xfs_bumplink(tp, target_dp); | |
f6c2d1fa | 412 | if (error) |
1da177e4 | 413 | goto abort_return; |
1da177e4 LT |
414 | } |
415 | } else { /* target_ip != NULL */ | |
1da177e4 LT |
416 | /* |
417 | * If target exists and it's a directory, check that both | |
418 | * target and source are directories and that target can be | |
419 | * destroyed, or that neither is a directory. | |
420 | */ | |
421 | if ((target_ip->i_d.di_mode & S_IFMT) == S_IFDIR) { | |
422 | /* | |
423 | * Make sure target dir is empty. | |
424 | */ | |
f6c2d1fa | 425 | if (!(xfs_dir_isempty(target_ip)) || |
1da177e4 LT |
426 | (target_ip->i_d.di_nlink > 2)) { |
427 | error = XFS_ERROR(EEXIST); | |
1da177e4 LT |
428 | goto error_return; |
429 | } | |
430 | } | |
431 | ||
432 | /* | |
433 | * Link the source inode under the target name. | |
434 | * If the source inode is a directory and we are moving | |
435 | * it across directories, its ".." entry will be | |
436 | * inconsistent until we replace that down below. | |
437 | * | |
438 | * In case there is already an entry with the same | |
439 | * name at the destination directory, remove it first. | |
440 | */ | |
f6c2d1fa NS |
441 | error = xfs_dir_replace(tp, target_dp, target_name, |
442 | target_namelen, src_ip->i_ino, | |
443 | &first_block, &free_list, spaceres); | |
444 | if (error) | |
1da177e4 | 445 | goto abort_return; |
1da177e4 LT |
446 | xfs_ichgtime(target_dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
447 | ||
448 | /* | |
449 | * Decrement the link count on the target since the target | |
450 | * dir no longer points to it. | |
451 | */ | |
452 | error = xfs_droplink(tp, target_ip); | |
f6c2d1fa | 453 | if (error) |
1da177e4 | 454 | goto abort_return; |
1da177e4 LT |
455 | target_ip_dropped = 1; |
456 | ||
457 | if (src_is_directory) { | |
458 | /* | |
459 | * Drop the link from the old "." entry. | |
460 | */ | |
461 | error = xfs_droplink(tp, target_ip); | |
f6c2d1fa | 462 | if (error) |
1da177e4 | 463 | goto abort_return; |
1da177e4 LT |
464 | } |
465 | ||
466 | /* Do this test while we still hold the locks */ | |
467 | target_link_zero = (target_ip)->i_d.di_nlink==0; | |
468 | ||
469 | } /* target_ip != NULL */ | |
470 | ||
471 | /* | |
472 | * Remove the source. | |
473 | */ | |
474 | if (new_parent && src_is_directory) { | |
1da177e4 LT |
475 | /* |
476 | * Rewrite the ".." entry to point to the new | |
477 | * directory. | |
478 | */ | |
f6c2d1fa NS |
479 | error = xfs_dir_replace(tp, src_ip, "..", 2, target_dp->i_ino, |
480 | &first_block, &free_list, spaceres); | |
1da177e4 | 481 | ASSERT(error != EEXIST); |
f6c2d1fa | 482 | if (error) |
1da177e4 | 483 | goto abort_return; |
1da177e4 LT |
484 | xfs_ichgtime(src_ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
485 | ||
486 | } else { | |
487 | /* | |
488 | * We always want to hit the ctime on the source inode. | |
489 | * We do it in the if clause above for the 'new_parent && | |
490 | * src_is_directory' case, and here we get all the other | |
491 | * cases. This isn't strictly required by the standards | |
492 | * since the source inode isn't really being changed, | |
493 | * but old unix file systems did it and some incremental | |
494 | * backup programs won't work without it. | |
495 | */ | |
496 | xfs_ichgtime(src_ip, XFS_ICHGTIME_CHG); | |
497 | } | |
498 | ||
499 | /* | |
500 | * Adjust the link count on src_dp. This is necessary when | |
501 | * renaming a directory, either within one parent when | |
502 | * the target existed, or across two parent directories. | |
503 | */ | |
504 | if (src_is_directory && (new_parent || target_ip != NULL)) { | |
505 | ||
506 | /* | |
507 | * Decrement link count on src_directory since the | |
508 | * entry that's moved no longer points to it. | |
509 | */ | |
510 | error = xfs_droplink(tp, src_dp); | |
f6c2d1fa | 511 | if (error) |
1da177e4 | 512 | goto abort_return; |
1da177e4 LT |
513 | } |
514 | ||
f6c2d1fa | 515 | error = xfs_dir_removename(tp, src_dp, src_name, src_namelen, |
1da177e4 | 516 | src_ip->i_ino, &first_block, &free_list, spaceres); |
f6c2d1fa | 517 | if (error) |
1da177e4 | 518 | goto abort_return; |
1da177e4 LT |
519 | xfs_ichgtime(src_dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
520 | ||
521 | /* | |
522 | * Update the generation counts on all the directory inodes | |
523 | * that we're modifying. | |
524 | */ | |
525 | src_dp->i_gen++; | |
526 | xfs_trans_log_inode(tp, src_dp, XFS_ILOG_CORE); | |
527 | ||
528 | if (new_parent) { | |
529 | target_dp->i_gen++; | |
530 | xfs_trans_log_inode(tp, target_dp, XFS_ILOG_CORE); | |
531 | } | |
532 | ||
533 | /* | |
534 | * If there was a target inode, take an extra reference on | |
535 | * it here so that it doesn't go to xfs_inactive() from | |
536 | * within the commit. | |
537 | */ | |
538 | if (target_ip != NULL) { | |
539 | IHOLD(target_ip); | |
540 | } | |
541 | ||
542 | /* | |
543 | * If this is a synchronous mount, make sure that the | |
544 | * rename transaction goes to disk before returning to | |
545 | * the user. | |
546 | */ | |
547 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
548 | xfs_trans_set_sync(tp); | |
549 | } | |
550 | ||
551 | /* | |
552 | * Take refs. for vop_link_removed calls below. No need to worry | |
553 | * about directory refs. because the caller holds them. | |
554 | * | |
555 | * Do holds before the xfs_bmap_finish since it might rele them down | |
556 | * to zero. | |
557 | */ | |
558 | ||
559 | if (target_ip_dropped) | |
560 | IHOLD(target_ip); | |
561 | IHOLD(src_ip); | |
562 | ||
f7c99b6f | 563 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
564 | if (error) { |
565 | xfs_bmap_cancel(&free_list); | |
566 | xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES | | |
567 | XFS_TRANS_ABORT)); | |
568 | if (target_ip != NULL) { | |
569 | IRELE(target_ip); | |
570 | } | |
571 | if (target_ip_dropped) { | |
572 | IRELE(target_ip); | |
573 | } | |
574 | IRELE(src_ip); | |
575 | goto std_return; | |
576 | } | |
577 | ||
578 | /* | |
579 | * trans_commit will unlock src_ip, target_ip & decrement | |
580 | * the vnode references. | |
581 | */ | |
1c72bf90 | 582 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
583 | if (target_ip != NULL) { |
584 | xfs_refcache_purge_ip(target_ip); | |
585 | IRELE(target_ip); | |
586 | } | |
587 | /* | |
588 | * Let interposed file systems know about removed links. | |
589 | */ | |
739bfb2a | 590 | if (target_ip_dropped) |
1da177e4 | 591 | IRELE(target_ip); |
1da177e4 | 592 | |
1da177e4 LT |
593 | IRELE(src_ip); |
594 | ||
595 | /* Fall through to std_return with error = 0 or errno from | |
596 | * xfs_trans_commit */ | |
597 | std_return: | |
eb9df39d CH |
598 | if (DM_EVENT_ENABLED(src_dp, DM_EVENT_POSTRENAME) || |
599 | DM_EVENT_ENABLED(target_dp, DM_EVENT_POSTRENAME)) { | |
1da177e4 LT |
600 | (void) XFS_SEND_NAMESP (mp, DM_EVENT_POSTRENAME, |
601 | src_dir_vp, DM_RIGHT_NULL, | |
602 | target_dir_vp, DM_RIGHT_NULL, | |
603 | src_name, target_name, | |
604 | 0, error, 0); | |
605 | } | |
606 | return error; | |
607 | ||
608 | abort_return: | |
609 | cancel_flags |= XFS_TRANS_ABORT; | |
610 | /* FALLTHROUGH */ | |
611 | error_return: | |
612 | xfs_bmap_cancel(&free_list); | |
613 | xfs_trans_cancel(tp, cancel_flags); | |
614 | goto std_return; | |
615 | ||
616 | rele_return: | |
617 | IRELE(src_ip); | |
618 | if (target_ip != NULL) { | |
619 | IRELE(target_ip); | |
620 | } | |
621 | goto std_return; | |
622 | } |