Commit | Line | Data |
---|---|---|
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 LT |
21 | #include "xfs_log.h" |
22 | #include "xfs_trans.h" | |
23 | #include "xfs_sb.h" | |
da353b0d | 24 | #include "xfs_ag.h" |
1da177e4 | 25 | #include "xfs_dir2.h" |
1da177e4 | 26 | #include "xfs_mount.h" |
a844f451 | 27 | #include "xfs_da_btree.h" |
1da177e4 | 28 | #include "xfs_bmap_btree.h" |
1da177e4 | 29 | #include "xfs_dinode.h" |
1da177e4 | 30 | #include "xfs_inode.h" |
a844f451 | 31 | #include "xfs_inode_item.h" |
1da177e4 LT |
32 | #include "xfs_bmap.h" |
33 | #include "xfs_error.h" | |
34 | #include "xfs_quota.h" | |
1da177e4 LT |
35 | #include "xfs_utils.h" |
36 | #include "xfs_trans_space.h" | |
a8272ce0 | 37 | #include "xfs_vnodeops.h" |
0b1b213f | 38 | #include "xfs_trace.h" |
1da177e4 LT |
39 | |
40 | ||
1da177e4 | 41 | /* |
cfa853e4 | 42 | * Enter all inodes for a rename transaction into a sorted array. |
1da177e4 | 43 | */ |
cfa853e4 CH |
44 | STATIC void |
45 | xfs_sort_for_rename( | |
556b8b16 BN |
46 | xfs_inode_t *dp1, /* in: old (source) directory inode */ |
47 | xfs_inode_t *dp2, /* in: new (target) directory inode */ | |
48 | xfs_inode_t *ip1, /* in: inode of old entry */ | |
cfa853e4 | 49 | xfs_inode_t *ip2, /* in: inode of new entry, if it |
1da177e4 | 50 | already exists, NULL otherwise. */ |
556b8b16 BN |
51 | xfs_inode_t **i_tab,/* out: array of inode returned, sorted */ |
52 | int *num_inodes) /* out: number of inodes in array */ | |
1da177e4 | 53 | { |
556b8b16 | 54 | xfs_inode_t *temp; |
1da177e4 | 55 | int i, j; |
1da177e4 LT |
56 | |
57 | /* | |
58 | * i_tab contains a list of pointers to inodes. We initialize | |
59 | * the table here & we'll sort it. We will then use it to | |
60 | * order the acquisition of the inode locks. | |
61 | * | |
62 | * Note that the table may contain duplicates. e.g., dp1 == dp2. | |
63 | */ | |
64 | i_tab[0] = dp1; | |
65 | i_tab[1] = dp2; | |
66 | i_tab[2] = ip1; | |
cfa853e4 | 67 | if (ip2) { |
1da177e4 LT |
68 | *num_inodes = 4; |
69 | i_tab[3] = ip2; | |
cfa853e4 CH |
70 | } else { |
71 | *num_inodes = 3; | |
72 | i_tab[3] = NULL; | |
1da177e4 LT |
73 | } |
74 | ||
75 | /* | |
76 | * Sort the elements via bubble sort. (Remember, there are at | |
77 | * most 4 elements to sort, so this is adequate.) | |
78 | */ | |
cfa853e4 CH |
79 | for (i = 0; i < *num_inodes; i++) { |
80 | for (j = 1; j < *num_inodes; j++) { | |
1da177e4 LT |
81 | if (i_tab[j]->i_ino < i_tab[j-1]->i_ino) { |
82 | temp = i_tab[j]; | |
83 | i_tab[j] = i_tab[j-1]; | |
84 | i_tab[j-1] = temp; | |
85 | } | |
86 | } | |
87 | } | |
1da177e4 LT |
88 | } |
89 | ||
1da177e4 LT |
90 | /* |
91 | * xfs_rename | |
92 | */ | |
93 | int | |
94 | xfs_rename( | |
993386c1 | 95 | xfs_inode_t *src_dp, |
556b8b16 BN |
96 | struct xfs_name *src_name, |
97 | xfs_inode_t *src_ip, | |
3937be5b | 98 | xfs_inode_t *target_dp, |
cfa853e4 CH |
99 | struct xfs_name *target_name, |
100 | xfs_inode_t *target_ip) | |
1da177e4 | 101 | { |
cfa853e4 | 102 | xfs_trans_t *tp = NULL; |
993386c1 | 103 | xfs_mount_t *mp = src_dp->i_mount; |
1da177e4 LT |
104 | int new_parent; /* moving to a new dir */ |
105 | int src_is_directory; /* src_name is a directory */ | |
106 | int error; | |
107 | xfs_bmap_free_t free_list; | |
108 | xfs_fsblock_t first_block; | |
109 | int cancel_flags; | |
110 | int committed; | |
111 | xfs_inode_t *inodes[4]; | |
1da177e4 | 112 | int spaceres; |
1da177e4 | 113 | int num_inodes; |
1da177e4 | 114 | |
cca28fb8 | 115 | trace_xfs_rename(src_dp, target_dp, src_name, target_name); |
1da177e4 | 116 | |
cfa853e4 | 117 | new_parent = (src_dp != target_dp); |
abbede1b | 118 | src_is_directory = S_ISDIR(src_ip->i_d.di_mode); |
1da177e4 | 119 | |
cfa853e4 CH |
120 | xfs_sort_for_rename(src_dp, target_dp, src_ip, target_ip, |
121 | inodes, &num_inodes); | |
1da177e4 | 122 | |
9d87c319 | 123 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 LT |
124 | tp = xfs_trans_alloc(mp, XFS_TRANS_RENAME); |
125 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
556b8b16 | 126 | spaceres = XFS_RENAME_SPACE_RES(mp, target_name->len); |
1da177e4 LT |
127 | error = xfs_trans_reserve(tp, spaceres, XFS_RENAME_LOG_RES(mp), 0, |
128 | XFS_TRANS_PERM_LOG_RES, XFS_RENAME_LOG_COUNT); | |
129 | if (error == ENOSPC) { | |
130 | spaceres = 0; | |
131 | error = xfs_trans_reserve(tp, 0, XFS_RENAME_LOG_RES(mp), 0, | |
132 | XFS_TRANS_PERM_LOG_RES, XFS_RENAME_LOG_COUNT); | |
133 | } | |
134 | if (error) { | |
1da177e4 | 135 | xfs_trans_cancel(tp, 0); |
1ac74e01 | 136 | goto std_return; |
1da177e4 LT |
137 | } |
138 | ||
139 | /* | |
140 | * Attach the dquots to the inodes | |
141 | */ | |
7d095257 CH |
142 | error = xfs_qm_vop_rename_dqattach(inodes); |
143 | if (error) { | |
1da177e4 | 144 | xfs_trans_cancel(tp, cancel_flags); |
1ac74e01 | 145 | goto std_return; |
1da177e4 LT |
146 | } |
147 | ||
148 | /* | |
cfa853e4 CH |
149 | * Lock all the participating inodes. Depending upon whether |
150 | * the target_name exists in the target directory, and | |
151 | * whether the target directory is the same as the source | |
152 | * directory, we can lock from 2 to 4 inodes. | |
153 | */ | |
154 | xfs_lock_inodes(inodes, num_inodes, XFS_ILOCK_EXCL); | |
155 | ||
1da177e4 LT |
156 | /* |
157 | * Join all the inodes to the transaction. From this point on, | |
158 | * we can rely on either trans_commit or trans_cancel to unlock | |
898621d5 | 159 | * them. |
1da177e4 | 160 | */ |
ddc3415a | 161 | xfs_trans_ijoin(tp, src_dp, XFS_ILOCK_EXCL); |
898621d5 | 162 | if (new_parent) |
ddc3415a CH |
163 | xfs_trans_ijoin(tp, target_dp, XFS_ILOCK_EXCL); |
164 | xfs_trans_ijoin(tp, src_ip, XFS_ILOCK_EXCL); | |
898621d5 | 165 | if (target_ip) |
ddc3415a | 166 | xfs_trans_ijoin(tp, target_ip, XFS_ILOCK_EXCL); |
1da177e4 | 167 | |
2175dd95 CH |
168 | /* |
169 | * If we are using project inheritance, we only allow renames | |
170 | * into our tree when the project IDs are the same; else the | |
171 | * tree quota mechanism would be circumvented. | |
172 | */ | |
173 | if (unlikely((target_dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && | |
6743099c | 174 | (xfs_get_projid(target_dp) != xfs_get_projid(src_ip)))) { |
2175dd95 CH |
175 | error = XFS_ERROR(EXDEV); |
176 | goto error_return; | |
177 | } | |
178 | ||
1da177e4 LT |
179 | /* |
180 | * Set up the target. | |
181 | */ | |
182 | if (target_ip == NULL) { | |
183 | /* | |
184 | * If there's no space reservation, check the entry will | |
185 | * fit before actually inserting it. | |
186 | */ | |
556b8b16 BN |
187 | error = xfs_dir_canenter(tp, target_dp, target_name, spaceres); |
188 | if (error) | |
1da177e4 | 189 | goto error_return; |
1da177e4 LT |
190 | /* |
191 | * If target does not exist and the rename crosses | |
192 | * directories, adjust the target directory link count | |
193 | * to account for the ".." reference from the new entry. | |
194 | */ | |
f6c2d1fa | 195 | error = xfs_dir_createname(tp, target_dp, target_name, |
556b8b16 BN |
196 | src_ip->i_ino, &first_block, |
197 | &free_list, spaceres); | |
f6c2d1fa | 198 | if (error == ENOSPC) |
1da177e4 | 199 | goto error_return; |
f6c2d1fa | 200 | if (error) |
1da177e4 | 201 | goto abort_return; |
dcd79a14 DC |
202 | |
203 | xfs_trans_ichgtime(tp, target_dp, | |
204 | XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
1da177e4 LT |
205 | |
206 | if (new_parent && src_is_directory) { | |
207 | error = xfs_bumplink(tp, target_dp); | |
f6c2d1fa | 208 | if (error) |
1da177e4 | 209 | goto abort_return; |
1da177e4 LT |
210 | } |
211 | } else { /* target_ip != NULL */ | |
1da177e4 LT |
212 | /* |
213 | * If target exists and it's a directory, check that both | |
214 | * target and source are directories and that target can be | |
215 | * destroyed, or that neither is a directory. | |
216 | */ | |
abbede1b | 217 | if (S_ISDIR(target_ip->i_d.di_mode)) { |
1da177e4 LT |
218 | /* |
219 | * Make sure target dir is empty. | |
220 | */ | |
f6c2d1fa | 221 | if (!(xfs_dir_isempty(target_ip)) || |
1da177e4 LT |
222 | (target_ip->i_d.di_nlink > 2)) { |
223 | error = XFS_ERROR(EEXIST); | |
1da177e4 LT |
224 | goto error_return; |
225 | } | |
226 | } | |
227 | ||
228 | /* | |
229 | * Link the source inode under the target name. | |
230 | * If the source inode is a directory and we are moving | |
231 | * it across directories, its ".." entry will be | |
232 | * inconsistent until we replace that down below. | |
233 | * | |
234 | * In case there is already an entry with the same | |
235 | * name at the destination directory, remove it first. | |
236 | */ | |
f6c2d1fa | 237 | error = xfs_dir_replace(tp, target_dp, target_name, |
556b8b16 | 238 | src_ip->i_ino, |
f6c2d1fa NS |
239 | &first_block, &free_list, spaceres); |
240 | if (error) | |
1da177e4 | 241 | goto abort_return; |
dcd79a14 DC |
242 | |
243 | xfs_trans_ichgtime(tp, target_dp, | |
244 | XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
1da177e4 LT |
245 | |
246 | /* | |
247 | * Decrement the link count on the target since the target | |
248 | * dir no longer points to it. | |
249 | */ | |
250 | error = xfs_droplink(tp, target_ip); | |
f6c2d1fa | 251 | if (error) |
1da177e4 | 252 | goto abort_return; |
1da177e4 LT |
253 | |
254 | if (src_is_directory) { | |
255 | /* | |
256 | * Drop the link from the old "." entry. | |
257 | */ | |
258 | error = xfs_droplink(tp, target_ip); | |
f6c2d1fa | 259 | if (error) |
1da177e4 | 260 | goto abort_return; |
1da177e4 | 261 | } |
1da177e4 LT |
262 | } /* target_ip != NULL */ |
263 | ||
264 | /* | |
265 | * Remove the source. | |
266 | */ | |
267 | if (new_parent && src_is_directory) { | |
1da177e4 LT |
268 | /* |
269 | * Rewrite the ".." entry to point to the new | |
270 | * directory. | |
271 | */ | |
556b8b16 BN |
272 | error = xfs_dir_replace(tp, src_ip, &xfs_name_dotdot, |
273 | target_dp->i_ino, | |
f6c2d1fa | 274 | &first_block, &free_list, spaceres); |
1da177e4 | 275 | ASSERT(error != EEXIST); |
f6c2d1fa | 276 | if (error) |
1da177e4 | 277 | goto abort_return; |
1da177e4 LT |
278 | } |
279 | ||
8f8670bb CH |
280 | /* |
281 | * We always want to hit the ctime on the source inode. | |
282 | * | |
283 | * This isn't strictly required by the standards since the source | |
284 | * inode isn't really being changed, but old unix file systems did | |
285 | * it and some incremental backup programs won't work without it. | |
286 | */ | |
dcd79a14 | 287 | xfs_trans_ichgtime(tp, src_ip, XFS_ICHGTIME_CHG); |
05340d4a | 288 | xfs_trans_log_inode(tp, src_ip, XFS_ILOG_CORE); |
8f8670bb | 289 | |
1da177e4 LT |
290 | /* |
291 | * Adjust the link count on src_dp. This is necessary when | |
292 | * renaming a directory, either within one parent when | |
293 | * the target existed, or across two parent directories. | |
294 | */ | |
295 | if (src_is_directory && (new_parent || target_ip != NULL)) { | |
296 | ||
297 | /* | |
298 | * Decrement link count on src_directory since the | |
299 | * entry that's moved no longer points to it. | |
300 | */ | |
301 | error = xfs_droplink(tp, src_dp); | |
f6c2d1fa | 302 | if (error) |
1da177e4 | 303 | goto abort_return; |
1da177e4 LT |
304 | } |
305 | ||
556b8b16 BN |
306 | error = xfs_dir_removename(tp, src_dp, src_name, src_ip->i_ino, |
307 | &first_block, &free_list, spaceres); | |
f6c2d1fa | 308 | if (error) |
1da177e4 | 309 | goto abort_return; |
1da177e4 | 310 | |
dcd79a14 | 311 | xfs_trans_ichgtime(tp, src_dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1da177e4 | 312 | xfs_trans_log_inode(tp, src_dp, XFS_ILOG_CORE); |
26c52951 | 313 | if (new_parent) |
1da177e4 | 314 | xfs_trans_log_inode(tp, target_dp, XFS_ILOG_CORE); |
1da177e4 | 315 | |
1da177e4 LT |
316 | /* |
317 | * If this is a synchronous mount, make sure that the | |
318 | * rename transaction goes to disk before returning to | |
319 | * the user. | |
320 | */ | |
321 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
322 | xfs_trans_set_sync(tp); | |
323 | } | |
324 | ||
f7c99b6f | 325 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
326 | if (error) { |
327 | xfs_bmap_cancel(&free_list); | |
328 | xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES | | |
329 | XFS_TRANS_ABORT)); | |
1da177e4 LT |
330 | goto std_return; |
331 | } | |
332 | ||
333 | /* | |
334 | * trans_commit will unlock src_ip, target_ip & decrement | |
335 | * the vnode references. | |
336 | */ | |
288699fe | 337 | return xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
338 | |
339 | abort_return: | |
340 | cancel_flags |= XFS_TRANS_ABORT; | |
1da177e4 LT |
341 | error_return: |
342 | xfs_bmap_cancel(&free_list); | |
343 | xfs_trans_cancel(tp, cancel_flags); | |
288699fe CH |
344 | std_return: |
345 | return error; | |
1da177e4 | 346 | } |