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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott7b718762005-11-02 14:58:39 +11002 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott7b718762005-11-02 14:58:39 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott7b718762005-11-02 14:58:39 +11009 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott7b718762005-11-02 14:58:39 +110014 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include "xfs.h"
Nathan Scotta844f452005-11-02 14:38:42 +110019#include "xfs_fs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include "xfs_types.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include "xfs_log.h"
Nathan Scotta844f452005-11-02 14:38:42 +110022#include "xfs_inum.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include "xfs_trans.h"
24#include "xfs_sb.h"
David Chinnerda353b02007-08-28 14:00:13 +100025#include "xfs_ag.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include "xfs_dir2.h"
27#include "xfs_dmapi.h"
28#include "xfs_mount.h"
Nathan Scotta844f452005-11-02 14:38:42 +110029#include "xfs_da_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include "xfs_bmap_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include "xfs_dir2_sf.h"
Nathan Scotta844f452005-11-02 14:38:42 +110032#include "xfs_attr_sf.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include "xfs_dinode.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include "xfs_inode.h"
Nathan Scotta844f452005-11-02 14:38:42 +110035#include "xfs_inode_item.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#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"
David Chinnera8272ce2007-11-23 16:28:09 +110042#include "xfs_vnodeops.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
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 */
50STATIC void
51xfs_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
72int 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 */
85STATIC int
86xfs_lock_for_rename(
87 xfs_inode_t *dp1, /* old (source) directory inode */
88 xfs_inode_t *dp2, /* new (target) directory inode */
Nathan Scott8285fb52006-06-09 17:07:12 +100089 bhv_vname_t *vname1,/* old entry name */
90 bhv_vname_t *vname2,/* new entry name */
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 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);
Lachlan McIlroycf441ee2008-02-07 16:42:19 +1100122 xfs_itrace_ref(ip1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123
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
Christoph Hellwig993386c2007-08-28 16:12:30 +1000133 error = xfs_dir_lookup_int(dp2, lock_mode, vname2, &inum2, &ip2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 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 {
Lachlan McIlroycf441ee2008-02-07 16:42:19 +1100145 xfs_itrace_ref(ip2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 }
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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220/*
221 * xfs_rename
222 */
223int
224xfs_rename(
Christoph Hellwig993386c2007-08-28 16:12:30 +1000225 xfs_inode_t *src_dp,
Nathan Scott8285fb52006-06-09 17:07:12 +1000226 bhv_vname_t *src_vname,
Nathan Scott67fcaa72006-06-09 17:00:52 +1000227 bhv_vnode_t *target_dir_vp,
Christoph Hellwig993386c2007-08-28 16:12:30 +1000228 bhv_vname_t *target_vname)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229{
Christoph Hellwig993386c2007-08-28 16:12:30 +1000230 bhv_vnode_t *src_dir_vp = XFS_ITOV(src_dp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 xfs_trans_t *tp;
Christoph Hellwig993386c2007-08-28 16:12:30 +1000232 xfs_inode_t *target_dp, *src_ip, *target_ip;
233 xfs_mount_t *mp = src_dp->i_mount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 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? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 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
Lachlan McIlroycf441ee2008-02-07 16:42:19 +1100251 xfs_itrace_entry(src_dp);
252 xfs_itrace_entry(xfs_vtoi(target_dir_vp));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253
254 /*
255 * Find the XFS behavior descriptor for the target directory
256 * vnode since it was not handed to us.
257 */
Christoph Hellwig75e17b32006-01-11 20:58:44 +1100258 target_dp = xfs_vtoi(target_dir_vp);
259 if (target_dp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 return XFS_ERROR(EXDEV);
261 }
262
Christoph Hellwigeb9df392007-08-16 18:42:07 +1000263 if (DM_EVENT_ENABLED(src_dp, DM_EVENT_RENAME) ||
264 DM_EVENT_ENABLED(target_dp, DM_EVENT_RENAME)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 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) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 /*
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) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 error = XFS_ERROR(EMLINK);
306 xfs_rename_unlock4(inodes, XFS_ILOCK_SHARED);
307 goto rele_return;
308 }
309 }
310
Nathan Scottb1ecdda2006-05-08 19:51:42 +1000311 /*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 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) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 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 &&
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000393 (error = xfs_dir_canenter(tp, target_dp, target_name,
394 target_namelen)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 goto error_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 /*
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 */
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000401 error = xfs_dir_createname(tp, target_dp, target_name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 target_namelen, src_ip->i_ino,
403 &first_block, &free_list, spaceres);
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000404 if (error == ENOSPC)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 goto error_return;
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000406 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 goto abort_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 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);
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000412 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 goto abort_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 }
415 } else { /* target_ip != NULL */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 /*
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 */
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000425 if (!(xfs_dir_isempty(target_ip)) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 (target_ip->i_d.di_nlink > 2)) {
427 error = XFS_ERROR(EEXIST);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 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 */
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000441 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)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 goto abort_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 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);
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000453 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 goto abort_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 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);
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000462 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 goto abort_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 }
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) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 /*
476 * Rewrite the ".." entry to point to the new
477 * directory.
478 */
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000479 error = xfs_dir_replace(tp, src_ip, "..", 2, target_dp->i_ino,
480 &first_block, &free_list, spaceres);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 ASSERT(error != EEXIST);
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000482 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 goto abort_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 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);
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000511 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 goto abort_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 }
514
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000515 error = xfs_dir_removename(tp, src_dp, src_name, src_namelen,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 src_ip->i_ino, &first_block, &free_list, spaceres);
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000517 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 goto abort_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 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
Eric Sandeenf7c99b62007-02-10 18:37:16 +1100563 error = xfs_bmap_finish(&tp, &free_list, &committed);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 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 */
Eric Sandeen1c72bf92007-05-08 13:48:42 +1000582 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 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 */
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000590 if (target_ip_dropped)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 IRELE(target_ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 IRELE(src_ip);
594
595 /* Fall through to std_return with error = 0 or errno from
596 * xfs_trans_commit */
597std_return:
Christoph Hellwigeb9df392007-08-16 18:42:07 +1000598 if (DM_EVENT_ENABLED(src_dp, DM_EVENT_POSTRENAME) ||
599 DM_EVENT_ENABLED(target_dp, DM_EVENT_POSTRENAME)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 (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}