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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"
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include "xfs_utils.h"
40#include "xfs_trans_space.h"
David Chinnera8272ce2007-11-23 16:28:09 +110041#include "xfs_vnodeops.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(
Barry Naujok556b8b12008-04-10 12:22:07 +100086 xfs_inode_t *dp1, /* in: old (source) directory inode */
87 xfs_inode_t *dp2, /* in: new (target) directory inode */
88 xfs_inode_t *ip1, /* in: inode of old entry */
89 struct xfs_name *name2, /* in: new entry name */
90 xfs_inode_t **ipp2, /* out: inode of new entry, if it
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 already exists, NULL otherwise. */
Barry Naujok556b8b12008-04-10 12:22:07 +100092 xfs_inode_t **i_tab,/* out: array of inode returned, sorted */
93 int *num_inodes) /* out: number of inodes in array */
Linus Torvalds1da177e2005-04-16 15:20:36 -070094{
Barry Naujok556b8b12008-04-10 12:22:07 +100095 xfs_inode_t *ip2 = NULL;
96 xfs_inode_t *temp;
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 xfs_ino_t inum1, inum2;
98 int error;
99 int i, j;
100 uint lock_mode;
101 int diff_dirs = (dp1 != dp2);
102
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 /*
104 * First, find out the current inums of the entries so that we
105 * can determine the initial locking order. We'll have to
106 * sanity check stuff after all the locks have been acquired
107 * to see if we still have the right inodes, directories, etc.
108 */
109 lock_mode = xfs_ilock_map_shared(dp1);
Christoph Hellwig43973962008-03-06 13:44:50 +1100110 IHOLD(ip1);
111 xfs_itrace_ref(ip1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112
113 inum1 = ip1->i_ino;
114
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 /*
116 * Unlock dp1 and lock dp2 if they are different.
117 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 if (diff_dirs) {
119 xfs_iunlock_map_shared(dp1, lock_mode);
120 lock_mode = xfs_ilock_map_shared(dp2);
121 }
122
Barry Naujok556b8b12008-04-10 12:22:07 +1000123 error = xfs_dir_lookup_int(dp2, lock_mode, name2, &inum2, &ip2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 if (error == ENOENT) { /* target does not need to exist. */
125 inum2 = 0;
126 } else if (error) {
127 /*
128 * If dp2 and dp1 are the same, the next line unlocks dp1.
129 * Got it?
130 */
131 xfs_iunlock_map_shared(dp2, lock_mode);
132 IRELE (ip1);
133 return error;
134 } else {
Lachlan McIlroycf441ee2008-02-07 16:42:19 +1100135 xfs_itrace_ref(ip2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 }
137
138 /*
139 * i_tab contains a list of pointers to inodes. We initialize
140 * the table here & we'll sort it. We will then use it to
141 * order the acquisition of the inode locks.
142 *
143 * Note that the table may contain duplicates. e.g., dp1 == dp2.
144 */
145 i_tab[0] = dp1;
146 i_tab[1] = dp2;
147 i_tab[2] = ip1;
148 if (inum2 == 0) {
149 *num_inodes = 3;
150 i_tab[3] = NULL;
151 } else {
152 *num_inodes = 4;
153 i_tab[3] = ip2;
154 }
Barry Naujok556b8b12008-04-10 12:22:07 +1000155 *ipp2 = i_tab[3];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
157 /*
158 * Sort the elements via bubble sort. (Remember, there are at
159 * most 4 elements to sort, so this is adequate.)
160 */
161 for (i=0; i < *num_inodes; i++) {
162 for (j=1; j < *num_inodes; j++) {
163 if (i_tab[j]->i_ino < i_tab[j-1]->i_ino) {
164 temp = i_tab[j];
165 i_tab[j] = i_tab[j-1];
166 i_tab[j-1] = temp;
167 }
168 }
169 }
170
171 /*
172 * We have dp2 locked. If it isn't first, unlock it.
173 * If it is first, tell xfs_lock_inodes so it can skip it
174 * when locking. if dp1 == dp2, xfs_lock_inodes will skip both
175 * since they are equal. xfs_lock_inodes needs all these inodes
176 * so that it can unlock and retry if there might be a dead-lock
177 * potential with the log.
178 */
179
180 if (i_tab[0] == dp2 && lock_mode == XFS_ILOCK_SHARED) {
181#ifdef DEBUG
182 xfs_rename_skip++;
183#endif
184 xfs_lock_inodes(i_tab, *num_inodes, 1, XFS_ILOCK_SHARED);
185 } else {
186#ifdef DEBUG
187 xfs_rename_nskip++;
188#endif
189 xfs_iunlock_map_shared(dp2, lock_mode);
190 xfs_lock_inodes(i_tab, *num_inodes, 0, XFS_ILOCK_SHARED);
191 }
192
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 return 0;
194}
195
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196/*
197 * xfs_rename
198 */
199int
200xfs_rename(
Christoph Hellwig993386c2007-08-28 16:12:30 +1000201 xfs_inode_t *src_dp,
Barry Naujok556b8b12008-04-10 12:22:07 +1000202 struct xfs_name *src_name,
203 xfs_inode_t *src_ip,
Christoph Hellwig3937be52008-03-06 13:46:19 +1100204 xfs_inode_t *target_dp,
Barry Naujok556b8b12008-04-10 12:22:07 +1000205 struct xfs_name *target_name)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206{
207 xfs_trans_t *tp;
Barry Naujok556b8b12008-04-10 12:22:07 +1000208 xfs_inode_t *target_ip;
Christoph Hellwig993386c2007-08-28 16:12:30 +1000209 xfs_mount_t *mp = src_dp->i_mount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 int new_parent; /* moving to a new dir */
211 int src_is_directory; /* src_name is a directory */
212 int error;
213 xfs_bmap_free_t free_list;
214 xfs_fsblock_t first_block;
215 int cancel_flags;
216 int committed;
217 xfs_inode_t *inodes[4];
218 int target_ip_dropped = 0; /* dropped target_ip link? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 int spaceres;
220 int target_link_zero = 0;
221 int num_inodes;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
Lachlan McIlroycf441ee2008-02-07 16:42:19 +1100223 xfs_itrace_entry(src_dp);
Christoph Hellwig3937be52008-03-06 13:46:19 +1100224 xfs_itrace_entry(target_dp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225
Christoph Hellwigeb9df392007-08-16 18:42:07 +1000226 if (DM_EVENT_ENABLED(src_dp, DM_EVENT_RENAME) ||
227 DM_EVENT_ENABLED(target_dp, DM_EVENT_RENAME)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 error = XFS_SEND_NAMESP(mp, DM_EVENT_RENAME,
Christoph Hellwigbc4ac742008-03-06 13:45:58 +1100229 src_dp, DM_RIGHT_NULL,
230 target_dp, DM_RIGHT_NULL,
Barry Naujok556b8b12008-04-10 12:22:07 +1000231 src_name->name, target_name->name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 0, 0, 0);
233 if (error) {
234 return error;
235 }
236 }
237 /* Return through std_return after this point. */
238
239 /*
240 * Lock all the participating inodes. Depending upon whether
241 * the target_name exists in the target directory, and
242 * whether the target directory is the same as the source
243 * directory, we can lock from 2 to 4 inodes.
244 * xfs_lock_for_rename() will return ENOENT if src_name
245 * does not exist in the source directory.
246 */
247 tp = NULL;
Barry Naujok556b8b12008-04-10 12:22:07 +1000248 error = xfs_lock_for_rename(src_dp, target_dp, src_ip, target_name,
249 &target_ip, inodes, &num_inodes);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 if (error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 /*
252 * We have nothing locked, no inode references, and
253 * no transaction, so just get out.
254 */
255 goto std_return;
256 }
257
258 ASSERT(src_ip != NULL);
259
260 if ((src_ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
261 /*
262 * Check for link count overflow on target_dp
263 */
264 if (target_ip == NULL && (src_dp != target_dp) &&
265 target_dp->i_d.di_nlink >= XFS_MAXLINK) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 error = XFS_ERROR(EMLINK);
267 xfs_rename_unlock4(inodes, XFS_ILOCK_SHARED);
268 goto rele_return;
269 }
270 }
271
Nathan Scottb1ecdda2006-05-08 19:51:42 +1000272 /*
273 * If we are using project inheritance, we only allow renames
274 * into our tree when the project IDs are the same; else the
275 * tree quota mechanism would be circumvented.
276 */
277 if (unlikely((target_dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) &&
278 (target_dp->i_d.di_projid != src_ip->i_d.di_projid))) {
279 error = XFS_ERROR(EXDEV);
280 xfs_rename_unlock4(inodes, XFS_ILOCK_SHARED);
281 goto rele_return;
282 }
283
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 new_parent = (src_dp != target_dp);
285 src_is_directory = ((src_ip->i_d.di_mode & S_IFMT) == S_IFDIR);
286
287 /*
288 * Drop the locks on our inodes so that we can start the transaction.
289 */
290 xfs_rename_unlock4(inodes, XFS_ILOCK_SHARED);
291
292 XFS_BMAP_INIT(&free_list, &first_block);
293 tp = xfs_trans_alloc(mp, XFS_TRANS_RENAME);
294 cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
Barry Naujok556b8b12008-04-10 12:22:07 +1000295 spaceres = XFS_RENAME_SPACE_RES(mp, target_name->len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 error = xfs_trans_reserve(tp, spaceres, XFS_RENAME_LOG_RES(mp), 0,
297 XFS_TRANS_PERM_LOG_RES, XFS_RENAME_LOG_COUNT);
298 if (error == ENOSPC) {
299 spaceres = 0;
300 error = xfs_trans_reserve(tp, 0, XFS_RENAME_LOG_RES(mp), 0,
301 XFS_TRANS_PERM_LOG_RES, XFS_RENAME_LOG_COUNT);
302 }
303 if (error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 xfs_trans_cancel(tp, 0);
305 goto rele_return;
306 }
307
308 /*
309 * Attach the dquots to the inodes
310 */
311 if ((error = XFS_QM_DQVOPRENAME(mp, inodes))) {
312 xfs_trans_cancel(tp, cancel_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 goto rele_return;
314 }
315
316 /*
317 * Reacquire the inode locks we dropped above.
318 */
319 xfs_lock_inodes(inodes, num_inodes, 0, XFS_ILOCK_EXCL);
320
321 /*
322 * Join all the inodes to the transaction. From this point on,
323 * we can rely on either trans_commit or trans_cancel to unlock
324 * them. Note that we need to add a vnode reference to the
325 * directories since trans_commit & trans_cancel will decrement
326 * them when they unlock the inodes. Also, we need to be careful
327 * not to add an inode to the transaction more than once.
328 */
Christoph Hellwig3937be52008-03-06 13:46:19 +1100329 IHOLD(src_dp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 xfs_trans_ijoin(tp, src_dp, XFS_ILOCK_EXCL);
331 if (new_parent) {
Christoph Hellwig3937be52008-03-06 13:46:19 +1100332 IHOLD(target_dp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 xfs_trans_ijoin(tp, target_dp, XFS_ILOCK_EXCL);
334 }
335 if ((src_ip != src_dp) && (src_ip != target_dp)) {
336 xfs_trans_ijoin(tp, src_ip, XFS_ILOCK_EXCL);
337 }
338 if ((target_ip != NULL) &&
339 (target_ip != src_ip) &&
340 (target_ip != src_dp) &&
341 (target_ip != target_dp)) {
342 xfs_trans_ijoin(tp, target_ip, XFS_ILOCK_EXCL);
343 }
344
345 /*
346 * Set up the target.
347 */
348 if (target_ip == NULL) {
349 /*
350 * If there's no space reservation, check the entry will
351 * fit before actually inserting it.
352 */
Barry Naujok556b8b12008-04-10 12:22:07 +1000353 error = xfs_dir_canenter(tp, target_dp, target_name, spaceres);
354 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 goto error_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 /*
357 * If target does not exist and the rename crosses
358 * directories, adjust the target directory link count
359 * to account for the ".." reference from the new entry.
360 */
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000361 error = xfs_dir_createname(tp, target_dp, target_name,
Barry Naujok556b8b12008-04-10 12:22:07 +1000362 src_ip->i_ino, &first_block,
363 &free_list, spaceres);
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000364 if (error == ENOSPC)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 goto error_return;
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000366 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 goto abort_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 xfs_ichgtime(target_dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
369
370 if (new_parent && src_is_directory) {
371 error = xfs_bumplink(tp, target_dp);
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000372 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 goto abort_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 }
375 } else { /* target_ip != NULL */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 /*
377 * If target exists and it's a directory, check that both
378 * target and source are directories and that target can be
379 * destroyed, or that neither is a directory.
380 */
381 if ((target_ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
382 /*
383 * Make sure target dir is empty.
384 */
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000385 if (!(xfs_dir_isempty(target_ip)) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 (target_ip->i_d.di_nlink > 2)) {
387 error = XFS_ERROR(EEXIST);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 goto error_return;
389 }
390 }
391
392 /*
393 * Link the source inode under the target name.
394 * If the source inode is a directory and we are moving
395 * it across directories, its ".." entry will be
396 * inconsistent until we replace that down below.
397 *
398 * In case there is already an entry with the same
399 * name at the destination directory, remove it first.
400 */
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000401 error = xfs_dir_replace(tp, target_dp, target_name,
Barry Naujok556b8b12008-04-10 12:22:07 +1000402 src_ip->i_ino,
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000403 &first_block, &free_list, spaceres);
404 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 goto abort_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 xfs_ichgtime(target_dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
407
408 /*
409 * Decrement the link count on the target since the target
410 * dir no longer points to it.
411 */
412 error = xfs_droplink(tp, target_ip);
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000413 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 goto abort_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 target_ip_dropped = 1;
416
417 if (src_is_directory) {
418 /*
419 * Drop the link from the old "." entry.
420 */
421 error = xfs_droplink(tp, target_ip);
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000422 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 goto abort_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 }
425
426 /* Do this test while we still hold the locks */
427 target_link_zero = (target_ip)->i_d.di_nlink==0;
428
429 } /* target_ip != NULL */
430
431 /*
432 * Remove the source.
433 */
434 if (new_parent && src_is_directory) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 /*
436 * Rewrite the ".." entry to point to the new
437 * directory.
438 */
Barry Naujok556b8b12008-04-10 12:22:07 +1000439 error = xfs_dir_replace(tp, src_ip, &xfs_name_dotdot,
440 target_dp->i_ino,
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000441 &first_block, &free_list, spaceres);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 ASSERT(error != EEXIST);
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000443 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 goto abort_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 xfs_ichgtime(src_ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
446
447 } else {
448 /*
449 * We always want to hit the ctime on the source inode.
450 * We do it in the if clause above for the 'new_parent &&
451 * src_is_directory' case, and here we get all the other
452 * cases. This isn't strictly required by the standards
453 * since the source inode isn't really being changed,
454 * but old unix file systems did it and some incremental
455 * backup programs won't work without it.
456 */
457 xfs_ichgtime(src_ip, XFS_ICHGTIME_CHG);
458 }
459
460 /*
461 * Adjust the link count on src_dp. This is necessary when
462 * renaming a directory, either within one parent when
463 * the target existed, or across two parent directories.
464 */
465 if (src_is_directory && (new_parent || target_ip != NULL)) {
466
467 /*
468 * Decrement link count on src_directory since the
469 * entry that's moved no longer points to it.
470 */
471 error = xfs_droplink(tp, src_dp);
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000472 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 goto abort_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 }
475
Barry Naujok556b8b12008-04-10 12:22:07 +1000476 error = xfs_dir_removename(tp, src_dp, src_name, src_ip->i_ino,
477 &first_block, &free_list, spaceres);
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000478 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 goto abort_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 xfs_ichgtime(src_dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
481
482 /*
483 * Update the generation counts on all the directory inodes
484 * that we're modifying.
485 */
486 src_dp->i_gen++;
487 xfs_trans_log_inode(tp, src_dp, XFS_ILOG_CORE);
488
489 if (new_parent) {
490 target_dp->i_gen++;
491 xfs_trans_log_inode(tp, target_dp, XFS_ILOG_CORE);
492 }
493
494 /*
495 * If there was a target inode, take an extra reference on
496 * it here so that it doesn't go to xfs_inactive() from
497 * within the commit.
498 */
499 if (target_ip != NULL) {
500 IHOLD(target_ip);
501 }
502
503 /*
504 * If this is a synchronous mount, make sure that the
505 * rename transaction goes to disk before returning to
506 * the user.
507 */
508 if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) {
509 xfs_trans_set_sync(tp);
510 }
511
512 /*
513 * Take refs. for vop_link_removed calls below. No need to worry
514 * about directory refs. because the caller holds them.
515 *
516 * Do holds before the xfs_bmap_finish since it might rele them down
517 * to zero.
518 */
519
520 if (target_ip_dropped)
521 IHOLD(target_ip);
522 IHOLD(src_ip);
523
Eric Sandeenf7c99b62007-02-10 18:37:16 +1100524 error = xfs_bmap_finish(&tp, &free_list, &committed);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 if (error) {
526 xfs_bmap_cancel(&free_list);
527 xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES |
528 XFS_TRANS_ABORT));
529 if (target_ip != NULL) {
530 IRELE(target_ip);
531 }
532 if (target_ip_dropped) {
533 IRELE(target_ip);
534 }
535 IRELE(src_ip);
536 goto std_return;
537 }
538
539 /*
540 * trans_commit will unlock src_ip, target_ip & decrement
541 * the vnode references.
542 */
Eric Sandeen1c72bf92007-05-08 13:48:42 +1000543 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
Donald Douwsma163d3682008-03-06 13:43:20 +1100544 if (target_ip != NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 IRELE(target_ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 /*
547 * Let interposed file systems know about removed links.
548 */
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000549 if (target_ip_dropped)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 IRELE(target_ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 IRELE(src_ip);
553
554 /* Fall through to std_return with error = 0 or errno from
555 * xfs_trans_commit */
556std_return:
Christoph Hellwigeb9df392007-08-16 18:42:07 +1000557 if (DM_EVENT_ENABLED(src_dp, DM_EVENT_POSTRENAME) ||
558 DM_EVENT_ENABLED(target_dp, DM_EVENT_POSTRENAME)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 (void) XFS_SEND_NAMESP (mp, DM_EVENT_POSTRENAME,
Christoph Hellwigbc4ac742008-03-06 13:45:58 +1100560 src_dp, DM_RIGHT_NULL,
561 target_dp, DM_RIGHT_NULL,
Barry Naujok556b8b12008-04-10 12:22:07 +1000562 src_name->name, target_name->name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 0, error, 0);
564 }
565 return error;
566
567 abort_return:
568 cancel_flags |= XFS_TRANS_ABORT;
569 /* FALLTHROUGH */
570 error_return:
571 xfs_bmap_cancel(&free_list);
572 xfs_trans_cancel(tp, cancel_flags);
573 goto std_return;
574
575 rele_return:
576 IRELE(src_ip);
577 if (target_ip != NULL) {
578 IRELE(target_ip);
579 }
580 goto std_return;
581}