blob: 44ea0ba36476fcd5e21f664cd27b8393ad795dfc [file] [log] [blame]
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"
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
43
44/*
45 * Given an array of up to 4 inode pointers, unlock the pointed to inodes.
46 * If there are fewer than 4 entries in the array, the empty entries will
47 * be at the end and will have NULL pointers in them.
48 */
49STATIC void
50xfs_rename_unlock4(
51 xfs_inode_t **i_tab,
52 uint lock_mode)
53{
54 int i;
55
56 xfs_iunlock(i_tab[0], lock_mode);
57 for (i = 1; i < 4; i++) {
58 if (i_tab[i] == NULL) {
59 break;
60 }
61 /*
62 * Watch out for duplicate entries in the table.
63 */
64 if (i_tab[i] != i_tab[i-1]) {
65 xfs_iunlock(i_tab[i], lock_mode);
66 }
67 }
68}
69
70#ifdef DEBUG
71int xfs_rename_skip, xfs_rename_nskip;
72#endif
73
74/*
75 * The following routine will acquire the locks required for a rename
76 * operation. The code understands the semantics of renames and will
77 * validate that name1 exists under dp1 & that name2 may or may not
78 * exist under dp2.
79 *
80 * We are renaming dp1/name1 to dp2/name2.
81 *
82 * Return ENOENT if dp1 does not exist, other lookup errors, or 0 for success.
83 */
84STATIC int
85xfs_lock_for_rename(
86 xfs_inode_t *dp1, /* old (source) directory inode */
87 xfs_inode_t *dp2, /* new (target) directory inode */
Nathan Scott8285fb52006-06-09 17:07:12 +100088 bhv_vname_t *vname1,/* old entry name */
89 bhv_vname_t *vname2,/* new entry name */
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 xfs_inode_t **ipp1, /* inode of old entry */
91 xfs_inode_t **ipp2, /* inode of new entry, if it
92 already exists, NULL otherwise. */
93 xfs_inode_t **i_tab,/* array of inode returned, sorted */
94 int *num_inodes) /* number of inodes in array */
95{
96 xfs_inode_t *ip1, *ip2, *temp;
97 xfs_ino_t inum1, inum2;
98 int error;
99 int i, j;
100 uint lock_mode;
101 int diff_dirs = (dp1 != dp2);
102
103 ip2 = NULL;
104
105 /*
106 * First, find out the current inums of the entries so that we
107 * can determine the initial locking order. We'll have to
108 * sanity check stuff after all the locks have been acquired
109 * to see if we still have the right inodes, directories, etc.
110 */
111 lock_mode = xfs_ilock_map_shared(dp1);
112 error = xfs_get_dir_entry(vname1, &ip1);
113 if (error) {
114 xfs_iunlock_map_shared(dp1, lock_mode);
115 return error;
116 }
117
118 inum1 = ip1->i_ino;
119
120 ASSERT(ip1);
121 ITRACE(ip1);
122
123 /*
124 * Unlock dp1 and lock dp2 if they are different.
125 */
126
127 if (diff_dirs) {
128 xfs_iunlock_map_shared(dp1, lock_mode);
129 lock_mode = xfs_ilock_map_shared(dp2);
130 }
131
Christoph Hellwig993386c2007-08-28 16:12:30 +1000132 error = xfs_dir_lookup_int(dp2, lock_mode, vname2, &inum2, &ip2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 if (error == ENOENT) { /* target does not need to exist. */
134 inum2 = 0;
135 } else if (error) {
136 /*
137 * If dp2 and dp1 are the same, the next line unlocks dp1.
138 * Got it?
139 */
140 xfs_iunlock_map_shared(dp2, lock_mode);
141 IRELE (ip1);
142 return error;
143 } else {
144 ITRACE(ip2);
145 }
146
147 /*
148 * i_tab contains a list of pointers to inodes. We initialize
149 * the table here & we'll sort it. We will then use it to
150 * order the acquisition of the inode locks.
151 *
152 * Note that the table may contain duplicates. e.g., dp1 == dp2.
153 */
154 i_tab[0] = dp1;
155 i_tab[1] = dp2;
156 i_tab[2] = ip1;
157 if (inum2 == 0) {
158 *num_inodes = 3;
159 i_tab[3] = NULL;
160 } else {
161 *num_inodes = 4;
162 i_tab[3] = ip2;
163 }
164
165 /*
166 * Sort the elements via bubble sort. (Remember, there are at
167 * most 4 elements to sort, so this is adequate.)
168 */
169 for (i=0; i < *num_inodes; i++) {
170 for (j=1; j < *num_inodes; j++) {
171 if (i_tab[j]->i_ino < i_tab[j-1]->i_ino) {
172 temp = i_tab[j];
173 i_tab[j] = i_tab[j-1];
174 i_tab[j-1] = temp;
175 }
176 }
177 }
178
179 /*
180 * We have dp2 locked. If it isn't first, unlock it.
181 * If it is first, tell xfs_lock_inodes so it can skip it
182 * when locking. if dp1 == dp2, xfs_lock_inodes will skip both
183 * since they are equal. xfs_lock_inodes needs all these inodes
184 * so that it can unlock and retry if there might be a dead-lock
185 * potential with the log.
186 */
187
188 if (i_tab[0] == dp2 && lock_mode == XFS_ILOCK_SHARED) {
189#ifdef DEBUG
190 xfs_rename_skip++;
191#endif
192 xfs_lock_inodes(i_tab, *num_inodes, 1, XFS_ILOCK_SHARED);
193 } else {
194#ifdef DEBUG
195 xfs_rename_nskip++;
196#endif
197 xfs_iunlock_map_shared(dp2, lock_mode);
198 xfs_lock_inodes(i_tab, *num_inodes, 0, XFS_ILOCK_SHARED);
199 }
200
201 /*
202 * Set the return value. Null out any unused entries in i_tab.
203 */
204 *ipp1 = *ipp2 = NULL;
205 for (i=0; i < *num_inodes; i++) {
206 if (i_tab[i]->i_ino == inum1) {
207 *ipp1 = i_tab[i];
208 }
209 if (i_tab[i]->i_ino == inum2) {
210 *ipp2 = i_tab[i];
211 }
212 }
213 for (;i < 4; i++) {
214 i_tab[i] = NULL;
215 }
216 return 0;
217}
218
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219/*
220 * xfs_rename
221 */
222int
223xfs_rename(
Christoph Hellwig993386c2007-08-28 16:12:30 +1000224 xfs_inode_t *src_dp,
Nathan Scott8285fb52006-06-09 17:07:12 +1000225 bhv_vname_t *src_vname,
Nathan Scott67fcaa72006-06-09 17:00:52 +1000226 bhv_vnode_t *target_dir_vp,
Christoph Hellwig993386c2007-08-28 16:12:30 +1000227 bhv_vname_t *target_vname)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228{
Christoph Hellwig993386c2007-08-28 16:12:30 +1000229 bhv_vnode_t *src_dir_vp = XFS_ITOV(src_dp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 xfs_trans_t *tp;
Christoph Hellwig993386c2007-08-28 16:12:30 +1000231 xfs_inode_t *target_dp, *src_ip, *target_ip;
232 xfs_mount_t *mp = src_dp->i_mount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 int new_parent; /* moving to a new dir */
234 int src_is_directory; /* src_name is a directory */
235 int error;
236 xfs_bmap_free_t free_list;
237 xfs_fsblock_t first_block;
238 int cancel_flags;
239 int committed;
240 xfs_inode_t *inodes[4];
241 int target_ip_dropped = 0; /* dropped target_ip link? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 int spaceres;
243 int target_link_zero = 0;
244 int num_inodes;
245 char *src_name = VNAME(src_vname);
246 char *target_name = VNAME(target_vname);
247 int src_namelen = VNAMELEN(src_vname);
248 int target_namelen = VNAMELEN(target_vname);
249
Christoph Hellwig1543d792007-08-29 11:46:47 +1000250 vn_trace_entry(src_dp, "xfs_rename", (inst_t *)__return_address);
251 vn_trace_entry(xfs_vtoi(target_dir_vp), "xfs_rename", (inst_t *)__return_address);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252
253 /*
254 * Find the XFS behavior descriptor for the target directory
255 * vnode since it was not handed to us.
256 */
Christoph Hellwig75e17b32006-01-11 20:58:44 +1100257 target_dp = xfs_vtoi(target_dir_vp);
258 if (target_dp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 return XFS_ERROR(EXDEV);
260 }
261
Christoph Hellwigeb9df392007-08-16 18:42:07 +1000262 if (DM_EVENT_ENABLED(src_dp, DM_EVENT_RENAME) ||
263 DM_EVENT_ENABLED(target_dp, DM_EVENT_RENAME)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 error = XFS_SEND_NAMESP(mp, DM_EVENT_RENAME,
265 src_dir_vp, DM_RIGHT_NULL,
266 target_dir_vp, DM_RIGHT_NULL,
267 src_name, target_name,
268 0, 0, 0);
269 if (error) {
270 return error;
271 }
272 }
273 /* Return through std_return after this point. */
274
275 /*
276 * Lock all the participating inodes. Depending upon whether
277 * the target_name exists in the target directory, and
278 * whether the target directory is the same as the source
279 * directory, we can lock from 2 to 4 inodes.
280 * xfs_lock_for_rename() will return ENOENT if src_name
281 * does not exist in the source directory.
282 */
283 tp = NULL;
284 error = xfs_lock_for_rename(src_dp, target_dp, src_vname,
285 target_vname, &src_ip, &target_ip, inodes,
286 &num_inodes);
287
288 if (error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 /*
290 * We have nothing locked, no inode references, and
291 * no transaction, so just get out.
292 */
293 goto std_return;
294 }
295
296 ASSERT(src_ip != NULL);
297
298 if ((src_ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
299 /*
300 * Check for link count overflow on target_dp
301 */
302 if (target_ip == NULL && (src_dp != target_dp) &&
303 target_dp->i_d.di_nlink >= XFS_MAXLINK) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 error = XFS_ERROR(EMLINK);
305 xfs_rename_unlock4(inodes, XFS_ILOCK_SHARED);
306 goto rele_return;
307 }
308 }
309
Nathan Scottb1ecdda2006-05-08 19:51:42 +1000310 /*
311 * If we are using project inheritance, we only allow renames
312 * into our tree when the project IDs are the same; else the
313 * tree quota mechanism would be circumvented.
314 */
315 if (unlikely((target_dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) &&
316 (target_dp->i_d.di_projid != src_ip->i_d.di_projid))) {
317 error = XFS_ERROR(EXDEV);
318 xfs_rename_unlock4(inodes, XFS_ILOCK_SHARED);
319 goto rele_return;
320 }
321
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 new_parent = (src_dp != target_dp);
323 src_is_directory = ((src_ip->i_d.di_mode & S_IFMT) == S_IFDIR);
324
325 /*
326 * Drop the locks on our inodes so that we can start the transaction.
327 */
328 xfs_rename_unlock4(inodes, XFS_ILOCK_SHARED);
329
330 XFS_BMAP_INIT(&free_list, &first_block);
331 tp = xfs_trans_alloc(mp, XFS_TRANS_RENAME);
332 cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
333 spaceres = XFS_RENAME_SPACE_RES(mp, target_namelen);
334 error = xfs_trans_reserve(tp, spaceres, XFS_RENAME_LOG_RES(mp), 0,
335 XFS_TRANS_PERM_LOG_RES, XFS_RENAME_LOG_COUNT);
336 if (error == ENOSPC) {
337 spaceres = 0;
338 error = xfs_trans_reserve(tp, 0, XFS_RENAME_LOG_RES(mp), 0,
339 XFS_TRANS_PERM_LOG_RES, XFS_RENAME_LOG_COUNT);
340 }
341 if (error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 xfs_trans_cancel(tp, 0);
343 goto rele_return;
344 }
345
346 /*
347 * Attach the dquots to the inodes
348 */
349 if ((error = XFS_QM_DQVOPRENAME(mp, inodes))) {
350 xfs_trans_cancel(tp, cancel_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 goto rele_return;
352 }
353
354 /*
355 * Reacquire the inode locks we dropped above.
356 */
357 xfs_lock_inodes(inodes, num_inodes, 0, XFS_ILOCK_EXCL);
358
359 /*
360 * Join all the inodes to the transaction. From this point on,
361 * we can rely on either trans_commit or trans_cancel to unlock
362 * them. Note that we need to add a vnode reference to the
363 * directories since trans_commit & trans_cancel will decrement
364 * them when they unlock the inodes. Also, we need to be careful
365 * not to add an inode to the transaction more than once.
366 */
367 VN_HOLD(src_dir_vp);
368 xfs_trans_ijoin(tp, src_dp, XFS_ILOCK_EXCL);
369 if (new_parent) {
370 VN_HOLD(target_dir_vp);
371 xfs_trans_ijoin(tp, target_dp, XFS_ILOCK_EXCL);
372 }
373 if ((src_ip != src_dp) && (src_ip != target_dp)) {
374 xfs_trans_ijoin(tp, src_ip, XFS_ILOCK_EXCL);
375 }
376 if ((target_ip != NULL) &&
377 (target_ip != src_ip) &&
378 (target_ip != src_dp) &&
379 (target_ip != target_dp)) {
380 xfs_trans_ijoin(tp, target_ip, XFS_ILOCK_EXCL);
381 }
382
383 /*
384 * Set up the target.
385 */
386 if (target_ip == NULL) {
387 /*
388 * If there's no space reservation, check the entry will
389 * fit before actually inserting it.
390 */
391 if (spaceres == 0 &&
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000392 (error = xfs_dir_canenter(tp, target_dp, target_name,
393 target_namelen)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 goto error_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 /*
396 * If target does not exist and the rename crosses
397 * directories, adjust the target directory link count
398 * to account for the ".." reference from the new entry.
399 */
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000400 error = xfs_dir_createname(tp, target_dp, target_name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 target_namelen, src_ip->i_ino,
402 &first_block, &free_list, spaceres);
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000403 if (error == ENOSPC)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 goto error_return;
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000405 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 goto abort_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 xfs_ichgtime(target_dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
408
409 if (new_parent && src_is_directory) {
410 error = xfs_bumplink(tp, target_dp);
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000411 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 goto abort_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 }
414 } else { /* target_ip != NULL */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 /*
416 * If target exists and it's a directory, check that both
417 * target and source are directories and that target can be
418 * destroyed, or that neither is a directory.
419 */
420 if ((target_ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
421 /*
422 * Make sure target dir is empty.
423 */
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000424 if (!(xfs_dir_isempty(target_ip)) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 (target_ip->i_d.di_nlink > 2)) {
426 error = XFS_ERROR(EEXIST);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 goto error_return;
428 }
429 }
430
431 /*
432 * Link the source inode under the target name.
433 * If the source inode is a directory and we are moving
434 * it across directories, its ".." entry will be
435 * inconsistent until we replace that down below.
436 *
437 * In case there is already an entry with the same
438 * name at the destination directory, remove it first.
439 */
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000440 error = xfs_dir_replace(tp, target_dp, target_name,
441 target_namelen, src_ip->i_ino,
442 &first_block, &free_list, spaceres);
443 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 goto abort_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 xfs_ichgtime(target_dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
446
447 /*
448 * Decrement the link count on the target since the target
449 * dir no longer points to it.
450 */
451 error = xfs_droplink(tp, target_ip);
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000452 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 goto abort_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 target_ip_dropped = 1;
455
456 if (src_is_directory) {
457 /*
458 * Drop the link from the old "." entry.
459 */
460 error = xfs_droplink(tp, target_ip);
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000461 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 goto abort_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 }
464
465 /* Do this test while we still hold the locks */
466 target_link_zero = (target_ip)->i_d.di_nlink==0;
467
468 } /* target_ip != NULL */
469
470 /*
471 * Remove the source.
472 */
473 if (new_parent && src_is_directory) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 /*
475 * Rewrite the ".." entry to point to the new
476 * directory.
477 */
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000478 error = xfs_dir_replace(tp, src_ip, "..", 2, target_dp->i_ino,
479 &first_block, &free_list, spaceres);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 ASSERT(error != EEXIST);
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000481 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 goto abort_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 xfs_ichgtime(src_ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
484
485 } else {
486 /*
487 * We always want to hit the ctime on the source inode.
488 * We do it in the if clause above for the 'new_parent &&
489 * src_is_directory' case, and here we get all the other
490 * cases. This isn't strictly required by the standards
491 * since the source inode isn't really being changed,
492 * but old unix file systems did it and some incremental
493 * backup programs won't work without it.
494 */
495 xfs_ichgtime(src_ip, XFS_ICHGTIME_CHG);
496 }
497
498 /*
499 * Adjust the link count on src_dp. This is necessary when
500 * renaming a directory, either within one parent when
501 * the target existed, or across two parent directories.
502 */
503 if (src_is_directory && (new_parent || target_ip != NULL)) {
504
505 /*
506 * Decrement link count on src_directory since the
507 * entry that's moved no longer points to it.
508 */
509 error = xfs_droplink(tp, src_dp);
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000510 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 goto abort_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 }
513
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000514 error = xfs_dir_removename(tp, src_dp, src_name, src_namelen,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 src_ip->i_ino, &first_block, &free_list, spaceres);
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000516 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 goto abort_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 xfs_ichgtime(src_dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
519
520 /*
521 * Update the generation counts on all the directory inodes
522 * that we're modifying.
523 */
524 src_dp->i_gen++;
525 xfs_trans_log_inode(tp, src_dp, XFS_ILOG_CORE);
526
527 if (new_parent) {
528 target_dp->i_gen++;
529 xfs_trans_log_inode(tp, target_dp, XFS_ILOG_CORE);
530 }
531
532 /*
533 * If there was a target inode, take an extra reference on
534 * it here so that it doesn't go to xfs_inactive() from
535 * within the commit.
536 */
537 if (target_ip != NULL) {
538 IHOLD(target_ip);
539 }
540
541 /*
542 * If this is a synchronous mount, make sure that the
543 * rename transaction goes to disk before returning to
544 * the user.
545 */
546 if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) {
547 xfs_trans_set_sync(tp);
548 }
549
550 /*
551 * Take refs. for vop_link_removed calls below. No need to worry
552 * about directory refs. because the caller holds them.
553 *
554 * Do holds before the xfs_bmap_finish since it might rele them down
555 * to zero.
556 */
557
558 if (target_ip_dropped)
559 IHOLD(target_ip);
560 IHOLD(src_ip);
561
Eric Sandeenf7c99b62007-02-10 18:37:16 +1100562 error = xfs_bmap_finish(&tp, &free_list, &committed);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 if (error) {
564 xfs_bmap_cancel(&free_list);
565 xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES |
566 XFS_TRANS_ABORT));
567 if (target_ip != NULL) {
568 IRELE(target_ip);
569 }
570 if (target_ip_dropped) {
571 IRELE(target_ip);
572 }
573 IRELE(src_ip);
574 goto std_return;
575 }
576
577 /*
578 * trans_commit will unlock src_ip, target_ip & decrement
579 * the vnode references.
580 */
Eric Sandeen1c72bf92007-05-08 13:48:42 +1000581 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 if (target_ip != NULL) {
583 xfs_refcache_purge_ip(target_ip);
584 IRELE(target_ip);
585 }
586 /*
587 * Let interposed file systems know about removed links.
588 */
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000589 if (target_ip_dropped)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590 IRELE(target_ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 IRELE(src_ip);
593
594 /* Fall through to std_return with error = 0 or errno from
595 * xfs_trans_commit */
596std_return:
Christoph Hellwigeb9df392007-08-16 18:42:07 +1000597 if (DM_EVENT_ENABLED(src_dp, DM_EVENT_POSTRENAME) ||
598 DM_EVENT_ENABLED(target_dp, DM_EVENT_POSTRENAME)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599 (void) XFS_SEND_NAMESP (mp, DM_EVENT_POSTRENAME,
600 src_dir_vp, DM_RIGHT_NULL,
601 target_dir_vp, DM_RIGHT_NULL,
602 src_name, target_name,
603 0, error, 0);
604 }
605 return error;
606
607 abort_return:
608 cancel_flags |= XFS_TRANS_ABORT;
609 /* FALLTHROUGH */
610 error_return:
611 xfs_bmap_cancel(&free_list);
612 xfs_trans_cancel(tp, cancel_flags);
613 goto std_return;
614
615 rele_return:
616 IRELE(src_ip);
617 if (target_ip != NULL) {
618 IRELE(target_ip);
619 }
620 goto std_return;
621}