Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
3e57ecf6 | 2 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
19de7351 | 3 | * Copyright (c) 2012 Red Hat, Inc. |
7b718769 | 4 | * All Rights Reserved. |
1da177e4 | 5 | * |
7b718769 NS |
6 | * This program is free software; you can redistribute it and/or |
7 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
8 | * published by the Free Software Foundation. |
9 | * | |
7b718769 NS |
10 | * This program is distributed in the hope that it would be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
1da177e4 | 14 | * |
7b718769 NS |
15 | * You should have received a copy of the GNU General Public License |
16 | * along with this program; if not, write the Free Software Foundation, | |
17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 18 | */ |
16f7e0fe | 19 | |
1da177e4 | 20 | #include "xfs.h" |
a844f451 | 21 | #include "xfs_fs.h" |
1da177e4 | 22 | #include "xfs_types.h" |
a844f451 | 23 | #include "xfs_bit.h" |
1da177e4 LT |
24 | #include "xfs_log.h" |
25 | #include "xfs_trans.h" | |
26 | #include "xfs_sb.h" | |
27 | #include "xfs_ag.h" | |
1da177e4 | 28 | #include "xfs_dir2.h" |
1da177e4 | 29 | #include "xfs_mount.h" |
a844f451 | 30 | #include "xfs_da_btree.h" |
1da177e4 LT |
31 | #include "xfs_bmap_btree.h" |
32 | #include "xfs_ialloc_btree.h" | |
1da177e4 | 33 | #include "xfs_dinode.h" |
1da177e4 | 34 | #include "xfs_inode.h" |
a844f451 | 35 | #include "xfs_inode_item.h" |
a844f451 | 36 | #include "xfs_itable.h" |
a844f451 NS |
37 | #include "xfs_ialloc.h" |
38 | #include "xfs_alloc.h" | |
1da177e4 | 39 | #include "xfs_bmap.h" |
ef14f0c1 | 40 | #include "xfs_acl.h" |
1da177e4 | 41 | #include "xfs_attr.h" |
1da177e4 | 42 | #include "xfs_error.h" |
1da177e4 LT |
43 | #include "xfs_quota.h" |
44 | #include "xfs_utils.h" | |
a844f451 | 45 | #include "xfs_rtalloc.h" |
1da177e4 | 46 | #include "xfs_trans_space.h" |
1da177e4 | 47 | #include "xfs_log_priv.h" |
2a82b8be | 48 | #include "xfs_filestream.h" |
993386c1 | 49 | #include "xfs_vnodeops.h" |
0b1b213f | 50 | #include "xfs_trace.h" |
33479e05 | 51 | #include "xfs_icache.h" |
19de7351 | 52 | #include "xfs_symlink.h" |
1da177e4 | 53 | |
1da177e4 | 54 | |
1da177e4 | 55 | /* |
92dfe8d2 DC |
56 | * This is called by xfs_inactive to free any blocks beyond eof |
57 | * when the link count isn't zero and by xfs_dm_punch_hole() when | |
58 | * punching a hole to EOF. | |
1da177e4 | 59 | */ |
40165e27 | 60 | int |
92dfe8d2 | 61 | xfs_free_eofblocks( |
1da177e4 | 62 | xfs_mount_t *mp, |
92dfe8d2 | 63 | xfs_inode_t *ip, |
5a15322d | 64 | bool need_iolock) |
1da177e4 LT |
65 | { |
66 | xfs_trans_t *tp; | |
67 | int error; | |
68 | xfs_fileoff_t end_fsb; | |
69 | xfs_fileoff_t last_fsb; | |
70 | xfs_filblks_t map_len; | |
71 | int nimaps; | |
72 | xfs_bmbt_irec_t imap; | |
73 | ||
74 | /* | |
75 | * Figure out if there are any blocks beyond the end | |
76 | * of the file. If not, then there is nothing to do. | |
77 | */ | |
ce7ae151 | 78 | end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_ISIZE(ip)); |
32972383 | 79 | last_fsb = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes); |
3f34885c | 80 | if (last_fsb <= end_fsb) |
014c2544 | 81 | return 0; |
3f34885c | 82 | map_len = last_fsb - end_fsb; |
1da177e4 LT |
83 | |
84 | nimaps = 1; | |
85 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
5c8ed202 | 86 | error = xfs_bmapi_read(ip, end_fsb, map_len, &imap, &nimaps, 0); |
1da177e4 LT |
87 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
88 | ||
89 | if (!error && (nimaps != 0) && | |
68bdb6ea YL |
90 | (imap.br_startblock != HOLESTARTBLOCK || |
91 | ip->i_delayed_blks)) { | |
1da177e4 LT |
92 | /* |
93 | * Attach the dquots to the inode up front. | |
94 | */ | |
7d095257 CH |
95 | error = xfs_qm_dqattach(ip, 0); |
96 | if (error) | |
014c2544 | 97 | return error; |
1da177e4 LT |
98 | |
99 | /* | |
100 | * There are blocks after the end of file. | |
101 | * Free them up now by truncating the file to | |
102 | * its current size. | |
103 | */ | |
104 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
105 | ||
5a15322d | 106 | if (need_iolock) { |
c56c9631 CH |
107 | if (!xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL)) { |
108 | xfs_trans_cancel(tp, 0); | |
40165e27 | 109 | return EAGAIN; |
c56c9631 | 110 | } |
c56c9631 | 111 | } |
1da177e4 LT |
112 | |
113 | error = xfs_trans_reserve(tp, 0, | |
114 | XFS_ITRUNCATE_LOG_RES(mp), | |
115 | 0, XFS_TRANS_PERM_LOG_RES, | |
116 | XFS_ITRUNCATE_LOG_COUNT); | |
117 | if (error) { | |
118 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
119 | xfs_trans_cancel(tp, 0); | |
5a15322d CH |
120 | if (need_iolock) |
121 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
014c2544 | 122 | return error; |
1da177e4 LT |
123 | } |
124 | ||
125 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
ddc3415a | 126 | xfs_trans_ijoin(tp, ip, 0); |
1da177e4 | 127 | |
673e8e59 CH |
128 | /* |
129 | * Do not update the on-disk file size. If we update the | |
130 | * on-disk file size and then the system crashes before the | |
131 | * contents of the file are flushed to disk then the files | |
132 | * may be full of holes (ie NULL files bug). | |
133 | */ | |
134 | error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, | |
ce7ae151 | 135 | XFS_ISIZE(ip)); |
1da177e4 | 136 | if (error) { |
8f04c47a CH |
137 | /* |
138 | * If we get an error at this point we simply don't | |
139 | * bother truncating the file. | |
140 | */ | |
1da177e4 LT |
141 | xfs_trans_cancel(tp, |
142 | (XFS_TRANS_RELEASE_LOG_RES | | |
143 | XFS_TRANS_ABORT)); | |
144 | } else { | |
145 | error = xfs_trans_commit(tp, | |
1c72bf90 | 146 | XFS_TRANS_RELEASE_LOG_RES); |
27b52867 BF |
147 | if (!error) |
148 | xfs_inode_clear_eofblocks_tag(ip); | |
1da177e4 | 149 | } |
5a15322d CH |
150 | |
151 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
152 | if (need_iolock) | |
153 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
1da177e4 | 154 | } |
014c2544 | 155 | return error; |
1da177e4 LT |
156 | } |
157 | ||
993386c1 | 158 | int |
1da177e4 | 159 | xfs_release( |
993386c1 | 160 | xfs_inode_t *ip) |
1da177e4 | 161 | { |
993386c1 | 162 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 LT |
163 | int error; |
164 | ||
42173f68 | 165 | if (!S_ISREG(ip->i_d.di_mode) || (ip->i_d.di_mode == 0)) |
1da177e4 | 166 | return 0; |
1da177e4 LT |
167 | |
168 | /* If this is a read-only mount, don't do this (would generate I/O) */ | |
bd186aa9 | 169 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
1da177e4 LT |
170 | return 0; |
171 | ||
2a82b8be | 172 | if (!XFS_FORCED_SHUTDOWN(mp)) { |
b3aea4ed CH |
173 | int truncated; |
174 | ||
2a82b8be DC |
175 | /* |
176 | * If we are using filestreams, and we have an unlinked | |
177 | * file that we are processing the last close on, then nothing | |
178 | * will be able to reopen and write to this file. Purge this | |
179 | * inode from the filestreams cache so that it doesn't delay | |
180 | * teardown of the inode. | |
181 | */ | |
182 | if ((ip->i_d.di_nlink == 0) && xfs_inode_is_filestream(ip)) | |
183 | xfs_filestream_deassociate(ip); | |
184 | ||
fbf3ce8d CH |
185 | /* |
186 | * If we previously truncated this file and removed old data | |
187 | * in the process, we want to initiate "early" writeout on | |
188 | * the last close. This is an attempt to combat the notorious | |
25985edc | 189 | * NULL files problem which is particularly noticeable from a |
fbf3ce8d CH |
190 | * truncate down, buffered (re-)write (delalloc), followed by |
191 | * a crash. What we are effectively doing here is | |
192 | * significantly reducing the time window where we'd otherwise | |
193 | * be exposed to that problem. | |
194 | */ | |
09262b43 | 195 | truncated = xfs_iflags_test_and_clear(ip, XFS_ITRUNCATED); |
df4368a1 DC |
196 | if (truncated) { |
197 | xfs_iflags_clear(ip, XFS_IDIRTY_RELEASE); | |
4bc1ea6b DC |
198 | if (VN_DIRTY(VFS_I(ip)) && ip->i_delayed_blks > 0) { |
199 | error = -filemap_flush(VFS_I(ip)->i_mapping); | |
200 | if (error) | |
201 | return error; | |
202 | } | |
df4368a1 | 203 | } |
fbf3ce8d CH |
204 | } |
205 | ||
6e857567 DC |
206 | if (ip->i_d.di_nlink == 0) |
207 | return 0; | |
c56c9631 | 208 | |
72b53efa | 209 | if (xfs_can_free_eofblocks(ip, false)) { |
6e857567 DC |
210 | |
211 | /* | |
212 | * If we can't get the iolock just skip truncating the blocks | |
213 | * past EOF because we could deadlock with the mmap_sem | |
214 | * otherwise. We'll get another chance to drop them once the | |
215 | * last reference to the inode is dropped, so we'll never leak | |
216 | * blocks permanently. | |
217 | * | |
218 | * Further, check if the inode is being opened, written and | |
219 | * closed frequently and we have delayed allocation blocks | |
25985edc | 220 | * outstanding (e.g. streaming writes from the NFS server), |
6e857567 DC |
221 | * truncating the blocks past EOF will cause fragmentation to |
222 | * occur. | |
223 | * | |
224 | * In this case don't do the truncation, either, but we have to | |
225 | * be careful how we detect this case. Blocks beyond EOF show | |
226 | * up as i_delayed_blks even when the inode is clean, so we | |
227 | * need to truncate them away first before checking for a dirty | |
228 | * release. Hence on the first dirty close we will still remove | |
229 | * the speculative allocation, but after that we will leave it | |
230 | * in place. | |
231 | */ | |
232 | if (xfs_iflags_test(ip, XFS_IDIRTY_RELEASE)) | |
233 | return 0; | |
1da177e4 | 234 | |
5a15322d | 235 | error = xfs_free_eofblocks(mp, ip, true); |
40165e27 | 236 | if (error && error != EAGAIN) |
6e857567 DC |
237 | return error; |
238 | ||
239 | /* delalloc blocks after truncation means it really is dirty */ | |
240 | if (ip->i_delayed_blks) | |
241 | xfs_iflags_set(ip, XFS_IDIRTY_RELEASE); | |
242 | } | |
1da177e4 LT |
243 | return 0; |
244 | } | |
245 | ||
246 | /* | |
247 | * xfs_inactive | |
248 | * | |
249 | * This is called when the vnode reference count for the vnode | |
250 | * goes to zero. If the file has been unlinked, then it must | |
251 | * now be truncated. Also, we clear all of the read-ahead state | |
252 | * kept for the inode here since the file is now closed. | |
253 | */ | |
993386c1 | 254 | int |
1da177e4 | 255 | xfs_inactive( |
993386c1 | 256 | xfs_inode_t *ip) |
1da177e4 | 257 | { |
67fcaa73 | 258 | xfs_bmap_free_t free_list; |
1da177e4 LT |
259 | xfs_fsblock_t first_block; |
260 | int committed; | |
261 | xfs_trans_t *tp; | |
262 | xfs_mount_t *mp; | |
263 | int error; | |
b373e98d | 264 | int truncate = 0; |
1da177e4 | 265 | |
1da177e4 LT |
266 | /* |
267 | * If the inode is already free, then there can be nothing | |
268 | * to clean up here. | |
269 | */ | |
cb4c8cc1 | 270 | if (ip->i_d.di_mode == 0 || is_bad_inode(VFS_I(ip))) { |
1da177e4 LT |
271 | ASSERT(ip->i_df.if_real_bytes == 0); |
272 | ASSERT(ip->i_df.if_broot_bytes == 0); | |
273 | return VN_INACTIVE_CACHE; | |
274 | } | |
275 | ||
1da177e4 LT |
276 | mp = ip->i_mount; |
277 | ||
1da177e4 LT |
278 | error = 0; |
279 | ||
280 | /* If this is a read-only mount, don't do this (would generate I/O) */ | |
bd186aa9 | 281 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
1da177e4 LT |
282 | goto out; |
283 | ||
284 | if (ip->i_d.di_nlink != 0) { | |
72b53efa BF |
285 | /* |
286 | * force is true because we are evicting an inode from the | |
287 | * cache. Post-eof blocks must be freed, lest we end up with | |
288 | * broken free space accounting. | |
289 | */ | |
290 | if (xfs_can_free_eofblocks(ip, true)) { | |
5a15322d | 291 | error = xfs_free_eofblocks(mp, ip, false); |
92dfe8d2 | 292 | if (error) |
014c2544 | 293 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
294 | } |
295 | goto out; | |
296 | } | |
297 | ||
b373e98d CH |
298 | if (S_ISREG(ip->i_d.di_mode) && |
299 | (ip->i_d.di_size != 0 || XFS_ISIZE(ip) != 0 || | |
300 | ip->i_d.di_nextents > 0 || ip->i_delayed_blks > 0)) | |
301 | truncate = 1; | |
1da177e4 | 302 | |
7d095257 CH |
303 | error = xfs_qm_dqattach(ip, 0); |
304 | if (error) | |
014c2544 | 305 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
306 | |
307 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
b373e98d CH |
308 | error = xfs_trans_reserve(tp, 0, |
309 | (truncate || S_ISLNK(ip->i_d.di_mode)) ? | |
310 | XFS_ITRUNCATE_LOG_RES(mp) : | |
311 | XFS_IFREE_LOG_RES(mp), | |
312 | 0, | |
313 | XFS_TRANS_PERM_LOG_RES, | |
314 | XFS_ITRUNCATE_LOG_COUNT); | |
315 | if (error) { | |
316 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
317 | xfs_trans_cancel(tp, 0); | |
318 | return VN_INACTIVE_CACHE; | |
319 | } | |
1da177e4 | 320 | |
0b56185b | 321 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
b373e98d | 322 | xfs_trans_ijoin(tp, ip, 0); |
1da177e4 | 323 | |
b373e98d CH |
324 | if (S_ISLNK(ip->i_d.di_mode)) { |
325 | /* | |
326 | * Zero length symlinks _can_ exist. | |
327 | */ | |
328 | if (ip->i_d.di_size > XFS_IFORK_DSIZE(ip)) { | |
329 | error = xfs_inactive_symlink_rmt(ip, &tp); | |
330 | if (error) | |
331 | goto out_cancel; | |
332 | } else if (ip->i_df.if_bytes > 0) { | |
333 | xfs_idata_realloc(ip, -(ip->i_df.if_bytes), | |
334 | XFS_DATA_FORK); | |
335 | ASSERT(ip->i_df.if_bytes == 0); | |
336 | } | |
337 | } else if (truncate) { | |
673e8e59 | 338 | ip->i_d.di_size = 0; |
673e8e59 CH |
339 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
340 | ||
341 | error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, 0); | |
b373e98d CH |
342 | if (error) |
343 | goto out_cancel; | |
673e8e59 CH |
344 | |
345 | ASSERT(ip->i_d.di_nextents == 0); | |
1da177e4 LT |
346 | } |
347 | ||
348 | /* | |
fe67be03 CH |
349 | * If there are attributes associated with the file then blow them away |
350 | * now. The code calls a routine that recursively deconstructs the | |
351 | * attribute fork. We need to just commit the current transaction | |
1da177e4 LT |
352 | * because we can't use it for xfs_attr_inactive(). |
353 | */ | |
354 | if (ip->i_d.di_anextents > 0) { | |
fe67be03 CH |
355 | ASSERT(ip->i_d.di_forkoff != 0); |
356 | ||
357 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); | |
fe67be03 | 358 | if (error) |
0b56185b CH |
359 | goto out_unlock; |
360 | ||
361 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
fe67be03 CH |
362 | |
363 | error = xfs_attr_inactive(ip); | |
364 | if (error) | |
0b56185b | 365 | goto out; |
fe67be03 CH |
366 | |
367 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
368 | error = xfs_trans_reserve(tp, 0, | |
369 | XFS_IFREE_LOG_RES(mp), | |
370 | 0, XFS_TRANS_PERM_LOG_RES, | |
371 | XFS_INACTIVE_LOG_COUNT); | |
0b56185b CH |
372 | if (error) { |
373 | xfs_trans_cancel(tp, 0); | |
374 | goto out; | |
375 | } | |
fe67be03 CH |
376 | |
377 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
378 | xfs_trans_ijoin(tp, ip, 0); | |
1da177e4 LT |
379 | } |
380 | ||
fe67be03 CH |
381 | if (ip->i_afp) |
382 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); | |
383 | ||
384 | ASSERT(ip->i_d.di_anextents == 0); | |
385 | ||
1da177e4 LT |
386 | /* |
387 | * Free the inode. | |
388 | */ | |
9d87c319 | 389 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 LT |
390 | error = xfs_ifree(tp, ip, &free_list); |
391 | if (error) { | |
392 | /* | |
393 | * If we fail to free the inode, shut down. The cancel | |
394 | * might do that, we need to make sure. Otherwise the | |
395 | * inode might be lost for a long time or forever. | |
396 | */ | |
397 | if (!XFS_FORCED_SHUTDOWN(mp)) { | |
0b932ccc DC |
398 | xfs_notice(mp, "%s: xfs_ifree returned error %d", |
399 | __func__, error); | |
7d04a335 | 400 | xfs_force_shutdown(mp, SHUTDOWN_META_IO_ERROR); |
1da177e4 LT |
401 | } |
402 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); | |
403 | } else { | |
404 | /* | |
405 | * Credit the quota account(s). The inode is gone. | |
406 | */ | |
7d095257 | 407 | xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_ICOUNT, -1); |
1da177e4 LT |
408 | |
409 | /* | |
78e9da77 DC |
410 | * Just ignore errors at this point. There is nothing we can |
411 | * do except to try to keep going. Make sure it's not a silent | |
412 | * error. | |
1da177e4 | 413 | */ |
78e9da77 DC |
414 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
415 | if (error) | |
53487786 DC |
416 | xfs_notice(mp, "%s: xfs_bmap_finish returned error %d", |
417 | __func__, error); | |
78e9da77 DC |
418 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
419 | if (error) | |
53487786 DC |
420 | xfs_notice(mp, "%s: xfs_trans_commit returned error %d", |
421 | __func__, error); | |
1da177e4 | 422 | } |
7d095257 | 423 | |
1da177e4 LT |
424 | /* |
425 | * Release the dquots held by inode, if any. | |
426 | */ | |
7d095257 | 427 | xfs_qm_dqdetach(ip); |
0b56185b CH |
428 | out_unlock: |
429 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
b373e98d CH |
430 | out: |
431 | return VN_INACTIVE_CACHE; | |
432 | out_cancel: | |
433 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
0b56185b | 434 | goto out_unlock; |
1da177e4 LT |
435 | } |
436 | ||
384f3ced BN |
437 | /* |
438 | * Lookups up an inode from "name". If ci_name is not NULL, then a CI match | |
439 | * is allowed, otherwise it has to be an exact match. If a CI match is found, | |
440 | * ci_name->name will point to a the actual name (caller must free) or | |
441 | * will be set to NULL if an exact match is found. | |
442 | */ | |
993386c1 | 443 | int |
1da177e4 | 444 | xfs_lookup( |
993386c1 | 445 | xfs_inode_t *dp, |
556b8b16 | 446 | struct xfs_name *name, |
384f3ced BN |
447 | xfs_inode_t **ipp, |
448 | struct xfs_name *ci_name) | |
1da177e4 | 449 | { |
eca450b7 | 450 | xfs_ino_t inum; |
1da177e4 LT |
451 | int error; |
452 | uint lock_mode; | |
1da177e4 | 453 | |
cca28fb8 | 454 | trace_xfs_lookup(dp, name); |
1da177e4 LT |
455 | |
456 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) | |
457 | return XFS_ERROR(EIO); | |
458 | ||
459 | lock_mode = xfs_ilock_map_shared(dp); | |
384f3ced | 460 | error = xfs_dir_lookup(NULL, dp, name, &inum, ci_name); |
1da177e4 | 461 | xfs_iunlock_map_shared(dp, lock_mode); |
eca450b7 CH |
462 | |
463 | if (error) | |
464 | goto out; | |
465 | ||
7b6259e7 | 466 | error = xfs_iget(dp->i_mount, NULL, inum, 0, 0, ipp); |
eca450b7 | 467 | if (error) |
384f3ced | 468 | goto out_free_name; |
eca450b7 | 469 | |
eca450b7 CH |
470 | return 0; |
471 | ||
384f3ced BN |
472 | out_free_name: |
473 | if (ci_name) | |
474 | kmem_free(ci_name->name); | |
475 | out: | |
eca450b7 | 476 | *ipp = NULL; |
1da177e4 LT |
477 | return error; |
478 | } | |
479 | ||
993386c1 | 480 | int |
1da177e4 | 481 | xfs_create( |
993386c1 | 482 | xfs_inode_t *dp, |
556b8b16 | 483 | struct xfs_name *name, |
576b1d67 | 484 | umode_t mode, |
3e5daf05 | 485 | xfs_dev_t rdev, |
6c77b0ea | 486 | xfs_inode_t **ipp) |
1da177e4 | 487 | { |
517b5e8c CH |
488 | int is_dir = S_ISDIR(mode); |
489 | struct xfs_mount *mp = dp->i_mount; | |
490 | struct xfs_inode *ip = NULL; | |
491 | struct xfs_trans *tp = NULL; | |
556b8b16 | 492 | int error; |
1da177e4 LT |
493 | xfs_bmap_free_t free_list; |
494 | xfs_fsblock_t first_block; | |
667a9291 | 495 | bool unlock_dp_on_error = false; |
1da177e4 LT |
496 | uint cancel_flags; |
497 | int committed; | |
6743099c | 498 | prid_t prid; |
517b5e8c CH |
499 | struct xfs_dquot *udqp = NULL; |
500 | struct xfs_dquot *gdqp = NULL; | |
1da177e4 | 501 | uint resblks; |
517b5e8c CH |
502 | uint log_res; |
503 | uint log_count; | |
1da177e4 | 504 | |
cca28fb8 | 505 | trace_xfs_create(dp, name); |
1da177e4 | 506 | |
517b5e8c CH |
507 | if (XFS_FORCED_SHUTDOWN(mp)) |
508 | return XFS_ERROR(EIO); | |
509 | ||
365ca83d | 510 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
6743099c | 511 | prid = xfs_get_projid(dp); |
1da177e4 | 512 | else |
6743099c | 513 | prid = XFS_PROJID_DEFAULT; |
1da177e4 LT |
514 | |
515 | /* | |
516 | * Make sure that we have allocated dquot(s) on disk. | |
517 | */ | |
7d095257 | 518 | error = xfs_qm_vop_dqalloc(dp, current_fsuid(), current_fsgid(), prid, |
517b5e8c | 519 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
1da177e4 | 520 | if (error) |
ec3ba85f | 521 | return error; |
1da177e4 | 522 | |
517b5e8c CH |
523 | if (is_dir) { |
524 | rdev = 0; | |
525 | resblks = XFS_MKDIR_SPACE_RES(mp, name->len); | |
526 | log_res = XFS_MKDIR_LOG_RES(mp); | |
527 | log_count = XFS_MKDIR_LOG_COUNT; | |
528 | tp = xfs_trans_alloc(mp, XFS_TRANS_MKDIR); | |
529 | } else { | |
530 | resblks = XFS_CREATE_SPACE_RES(mp, name->len); | |
531 | log_res = XFS_CREATE_LOG_RES(mp); | |
532 | log_count = XFS_CREATE_LOG_COUNT; | |
533 | tp = xfs_trans_alloc(mp, XFS_TRANS_CREATE); | |
534 | } | |
1da177e4 | 535 | |
1da177e4 | 536 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
517b5e8c | 537 | |
1da177e4 LT |
538 | /* |
539 | * Initially assume that the file does not exist and | |
540 | * reserve the resources for that case. If that is not | |
541 | * the case we'll drop the one we have and get a more | |
542 | * appropriate transaction later. | |
543 | */ | |
517b5e8c CH |
544 | error = xfs_trans_reserve(tp, resblks, log_res, 0, |
545 | XFS_TRANS_PERM_LOG_RES, log_count); | |
1da177e4 | 546 | if (error == ENOSPC) { |
153fec43 | 547 | /* flush outstanding delalloc blocks and retry */ |
9aa05000 | 548 | xfs_flush_inodes(mp); |
4734d401 CH |
549 | error = xfs_trans_reserve(tp, resblks, log_res, 0, |
550 | XFS_TRANS_PERM_LOG_RES, log_count); | |
153fec43 DC |
551 | } |
552 | if (error == ENOSPC) { | |
553 | /* No space at all so try a "no-allocation" reservation */ | |
1da177e4 | 554 | resblks = 0; |
517b5e8c CH |
555 | error = xfs_trans_reserve(tp, 0, log_res, 0, |
556 | XFS_TRANS_PERM_LOG_RES, log_count); | |
1da177e4 LT |
557 | } |
558 | if (error) { | |
559 | cancel_flags = 0; | |
517b5e8c | 560 | goto out_trans_cancel; |
1da177e4 LT |
561 | } |
562 | ||
f7c66ce3 | 563 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
667a9291 | 564 | unlock_dp_on_error = true; |
1da177e4 | 565 | |
517b5e8c | 566 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 LT |
567 | |
568 | /* | |
569 | * Reserve disk quota and the inode. | |
570 | */ | |
7d095257 | 571 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, resblks, 1, 0); |
1da177e4 | 572 | if (error) |
517b5e8c | 573 | goto out_trans_cancel; |
1da177e4 | 574 | |
556b8b16 BN |
575 | error = xfs_dir_canenter(tp, dp, name, resblks); |
576 | if (error) | |
517b5e8c CH |
577 | goto out_trans_cancel; |
578 | ||
579 | /* | |
580 | * A newly created regular or special file just has one directory | |
581 | * entry pointing to them, but a directory also the "." entry | |
582 | * pointing to itself. | |
583 | */ | |
6c77b0ea | 584 | error = xfs_dir_ialloc(&tp, dp, mode, is_dir ? 2 : 1, rdev, |
517b5e8c | 585 | prid, resblks > 0, &ip, &committed); |
1da177e4 LT |
586 | if (error) { |
587 | if (error == ENOSPC) | |
517b5e8c CH |
588 | goto out_trans_cancel; |
589 | goto out_trans_abort; | |
1da177e4 | 590 | } |
1da177e4 | 591 | |
1da177e4 | 592 | /* |
993386c1 CH |
593 | * Now we join the directory inode to the transaction. We do not do it |
594 | * earlier because xfs_dir_ialloc might commit the previous transaction | |
595 | * (and release all the locks). An error from here on will result in | |
596 | * the transaction cancel unlocking dp so don't do it explicitly in the | |
597 | * error path. | |
1da177e4 | 598 | */ |
ddc3415a | 599 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
667a9291 | 600 | unlock_dp_on_error = false; |
1da177e4 | 601 | |
556b8b16 | 602 | error = xfs_dir_createname(tp, dp, name, ip->i_ino, |
f6c2d1fa NS |
603 | &first_block, &free_list, resblks ? |
604 | resblks - XFS_IALLOC_SPACE_RES(mp) : 0); | |
1da177e4 LT |
605 | if (error) { |
606 | ASSERT(error != ENOSPC); | |
517b5e8c | 607 | goto out_trans_abort; |
1da177e4 | 608 | } |
dcd79a14 | 609 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1da177e4 LT |
610 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); |
611 | ||
517b5e8c CH |
612 | if (is_dir) { |
613 | error = xfs_dir_init(tp, ip, dp); | |
614 | if (error) | |
615 | goto out_bmap_cancel; | |
616 | ||
617 | error = xfs_bumplink(tp, dp); | |
618 | if (error) | |
619 | goto out_bmap_cancel; | |
620 | } | |
621 | ||
1da177e4 LT |
622 | /* |
623 | * If this is a synchronous mount, make sure that the | |
624 | * create transaction goes to disk before returning to | |
625 | * the user. | |
626 | */ | |
517b5e8c | 627 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) |
1da177e4 | 628 | xfs_trans_set_sync(tp); |
1da177e4 | 629 | |
1da177e4 LT |
630 | /* |
631 | * Attach the dquot(s) to the inodes and modify them incore. | |
632 | * These ids of the inode couldn't have changed since the new | |
633 | * inode has been locked ever since it was created. | |
634 | */ | |
7d095257 | 635 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp); |
1da177e4 | 636 | |
f7c99b6f | 637 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
517b5e8c | 638 | if (error) |
ec3ba85f | 639 | goto out_bmap_cancel; |
1da177e4 | 640 | |
1c72bf90 | 641 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
ec3ba85f CH |
642 | if (error) |
643 | goto out_release_inode; | |
1da177e4 | 644 | |
7d095257 CH |
645 | xfs_qm_dqrele(udqp); |
646 | xfs_qm_dqrele(gdqp); | |
1da177e4 | 647 | |
979ebab1 | 648 | *ipp = ip; |
288699fe | 649 | return 0; |
1da177e4 | 650 | |
517b5e8c CH |
651 | out_bmap_cancel: |
652 | xfs_bmap_cancel(&free_list); | |
653 | out_trans_abort: | |
1da177e4 | 654 | cancel_flags |= XFS_TRANS_ABORT; |
517b5e8c CH |
655 | out_trans_cancel: |
656 | xfs_trans_cancel(tp, cancel_flags); | |
ec3ba85f CH |
657 | out_release_inode: |
658 | /* | |
659 | * Wait until after the current transaction is aborted to | |
660 | * release the inode. This prevents recursive transactions | |
661 | * and deadlocks from xfs_inactive. | |
662 | */ | |
663 | if (ip) | |
664 | IRELE(ip); | |
665 | ||
7d095257 CH |
666 | xfs_qm_dqrele(udqp); |
667 | xfs_qm_dqrele(gdqp); | |
1da177e4 | 668 | |
993386c1 CH |
669 | if (unlock_dp_on_error) |
670 | xfs_iunlock(dp, XFS_ILOCK_EXCL); | |
288699fe | 671 | return error; |
1da177e4 LT |
672 | } |
673 | ||
1da177e4 LT |
674 | #ifdef DEBUG |
675 | int xfs_locked_n; | |
676 | int xfs_small_retries; | |
677 | int xfs_middle_retries; | |
678 | int xfs_lots_retries; | |
679 | int xfs_lock_delays; | |
680 | #endif | |
681 | ||
f7c66ce3 LM |
682 | /* |
683 | * Bump the subclass so xfs_lock_inodes() acquires each lock with | |
684 | * a different value | |
685 | */ | |
686 | static inline int | |
687 | xfs_lock_inumorder(int lock_mode, int subclass) | |
688 | { | |
689 | if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) | |
0f1145cc | 690 | lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_IOLOCK_SHIFT; |
f7c66ce3 | 691 | if (lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) |
0f1145cc | 692 | lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_ILOCK_SHIFT; |
f7c66ce3 LM |
693 | |
694 | return lock_mode; | |
695 | } | |
696 | ||
1da177e4 LT |
697 | /* |
698 | * The following routine will lock n inodes in exclusive mode. | |
699 | * We assume the caller calls us with the inodes in i_ino order. | |
700 | * | |
701 | * We need to detect deadlock where an inode that we lock | |
702 | * is in the AIL and we start waiting for another inode that is locked | |
703 | * by a thread in a long running transaction (such as truncate). This can | |
704 | * result in deadlock since the long running trans might need to wait | |
705 | * for the inode we just locked in order to push the tail and free space | |
706 | * in the log. | |
707 | */ | |
708 | void | |
709 | xfs_lock_inodes( | |
710 | xfs_inode_t **ips, | |
711 | int inodes, | |
1da177e4 LT |
712 | uint lock_mode) |
713 | { | |
714 | int attempts = 0, i, j, try_lock; | |
715 | xfs_log_item_t *lp; | |
716 | ||
717 | ASSERT(ips && (inodes >= 2)); /* we need at least two */ | |
718 | ||
cfa853e4 CH |
719 | try_lock = 0; |
720 | i = 0; | |
1da177e4 LT |
721 | |
722 | again: | |
723 | for (; i < inodes; i++) { | |
724 | ASSERT(ips[i]); | |
725 | ||
726 | if (i && (ips[i] == ips[i-1])) /* Already locked */ | |
727 | continue; | |
728 | ||
729 | /* | |
730 | * If try_lock is not set yet, make sure all locked inodes | |
731 | * are not in the AIL. | |
732 | * If any are, set try_lock to be used later. | |
733 | */ | |
734 | ||
735 | if (!try_lock) { | |
736 | for (j = (i - 1); j >= 0 && !try_lock; j--) { | |
737 | lp = (xfs_log_item_t *)ips[j]->i_itemp; | |
738 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { | |
739 | try_lock++; | |
740 | } | |
741 | } | |
742 | } | |
743 | ||
744 | /* | |
745 | * If any of the previous locks we have locked is in the AIL, | |
746 | * we must TRY to get the second and subsequent locks. If | |
747 | * we can't get any, we must release all we have | |
748 | * and try again. | |
749 | */ | |
750 | ||
751 | if (try_lock) { | |
752 | /* try_lock must be 0 if i is 0. */ | |
753 | /* | |
754 | * try_lock means we have an inode locked | |
755 | * that is in the AIL. | |
756 | */ | |
757 | ASSERT(i != 0); | |
f7c66ce3 | 758 | if (!xfs_ilock_nowait(ips[i], xfs_lock_inumorder(lock_mode, i))) { |
1da177e4 LT |
759 | attempts++; |
760 | ||
761 | /* | |
762 | * Unlock all previous guys and try again. | |
763 | * xfs_iunlock will try to push the tail | |
764 | * if the inode is in the AIL. | |
765 | */ | |
766 | ||
767 | for(j = i - 1; j >= 0; j--) { | |
768 | ||
769 | /* | |
770 | * Check to see if we've already | |
771 | * unlocked this one. | |
772 | * Not the first one going back, | |
773 | * and the inode ptr is the same. | |
774 | */ | |
775 | if ((j != (i - 1)) && ips[j] == | |
776 | ips[j+1]) | |
777 | continue; | |
778 | ||
779 | xfs_iunlock(ips[j], lock_mode); | |
780 | } | |
781 | ||
782 | if ((attempts % 5) == 0) { | |
783 | delay(1); /* Don't just spin the CPU */ | |
784 | #ifdef DEBUG | |
785 | xfs_lock_delays++; | |
786 | #endif | |
787 | } | |
788 | i = 0; | |
789 | try_lock = 0; | |
790 | goto again; | |
791 | } | |
792 | } else { | |
f7c66ce3 | 793 | xfs_ilock(ips[i], xfs_lock_inumorder(lock_mode, i)); |
1da177e4 LT |
794 | } |
795 | } | |
796 | ||
797 | #ifdef DEBUG | |
798 | if (attempts) { | |
799 | if (attempts < 5) xfs_small_retries++; | |
800 | else if (attempts < 100) xfs_middle_retries++; | |
801 | else xfs_lots_retries++; | |
802 | } else { | |
803 | xfs_locked_n++; | |
804 | } | |
805 | #endif | |
806 | } | |
807 | ||
f9114eba DC |
808 | /* |
809 | * xfs_lock_two_inodes() can only be used to lock one type of lock | |
810 | * at a time - the iolock or the ilock, but not both at once. If | |
811 | * we lock both at once, lockdep will report false positives saying | |
812 | * we have violated locking orders. | |
813 | */ | |
e1cccd91 CH |
814 | void |
815 | xfs_lock_two_inodes( | |
816 | xfs_inode_t *ip0, | |
817 | xfs_inode_t *ip1, | |
818 | uint lock_mode) | |
819 | { | |
820 | xfs_inode_t *temp; | |
821 | int attempts = 0; | |
822 | xfs_log_item_t *lp; | |
823 | ||
f9114eba DC |
824 | if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) |
825 | ASSERT((lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) == 0); | |
e1cccd91 CH |
826 | ASSERT(ip0->i_ino != ip1->i_ino); |
827 | ||
828 | if (ip0->i_ino > ip1->i_ino) { | |
829 | temp = ip0; | |
830 | ip0 = ip1; | |
831 | ip1 = temp; | |
832 | } | |
833 | ||
834 | again: | |
835 | xfs_ilock(ip0, xfs_lock_inumorder(lock_mode, 0)); | |
836 | ||
837 | /* | |
838 | * If the first lock we have locked is in the AIL, we must TRY to get | |
839 | * the second lock. If we can't get it, we must release the first one | |
840 | * and try again. | |
841 | */ | |
842 | lp = (xfs_log_item_t *)ip0->i_itemp; | |
843 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { | |
844 | if (!xfs_ilock_nowait(ip1, xfs_lock_inumorder(lock_mode, 1))) { | |
845 | xfs_iunlock(ip0, lock_mode); | |
846 | if ((++attempts % 5) == 0) | |
847 | delay(1); /* Don't just spin the CPU */ | |
848 | goto again; | |
849 | } | |
850 | } else { | |
851 | xfs_ilock(ip1, xfs_lock_inumorder(lock_mode, 1)); | |
852 | } | |
853 | } | |
854 | ||
993386c1 | 855 | int |
1da177e4 | 856 | xfs_remove( |
993386c1 | 857 | xfs_inode_t *dp, |
556b8b16 BN |
858 | struct xfs_name *name, |
859 | xfs_inode_t *ip) | |
1da177e4 | 860 | { |
993386c1 | 861 | xfs_mount_t *mp = dp->i_mount; |
1da177e4 | 862 | xfs_trans_t *tp = NULL; |
8f112e3b | 863 | int is_dir = S_ISDIR(ip->i_d.di_mode); |
1da177e4 LT |
864 | int error = 0; |
865 | xfs_bmap_free_t free_list; | |
866 | xfs_fsblock_t first_block; | |
867 | int cancel_flags; | |
868 | int committed; | |
1da177e4 LT |
869 | int link_zero; |
870 | uint resblks; | |
8f112e3b | 871 | uint log_count; |
1da177e4 | 872 | |
cca28fb8 | 873 | trace_xfs_remove(dp, name); |
1da177e4 | 874 | |
1da177e4 LT |
875 | if (XFS_FORCED_SHUTDOWN(mp)) |
876 | return XFS_ERROR(EIO); | |
877 | ||
7d095257 | 878 | error = xfs_qm_dqattach(dp, 0); |
8f112e3b CH |
879 | if (error) |
880 | goto std_return; | |
881 | ||
7d095257 | 882 | error = xfs_qm_dqattach(ip, 0); |
8f112e3b | 883 | if (error) |
1da177e4 | 884 | goto std_return; |
1da177e4 | 885 | |
8f112e3b CH |
886 | if (is_dir) { |
887 | tp = xfs_trans_alloc(mp, XFS_TRANS_RMDIR); | |
888 | log_count = XFS_DEFAULT_LOG_COUNT; | |
889 | } else { | |
890 | tp = xfs_trans_alloc(mp, XFS_TRANS_REMOVE); | |
891 | log_count = XFS_REMOVE_LOG_COUNT; | |
892 | } | |
1da177e4 | 893 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
8f112e3b | 894 | |
1da177e4 LT |
895 | /* |
896 | * We try to get the real space reservation first, | |
897 | * allowing for directory btree deletion(s) implying | |
898 | * possible bmap insert(s). If we can't get the space | |
899 | * reservation then we use 0 instead, and avoid the bmap | |
900 | * btree insert(s) in the directory code by, if the bmap | |
901 | * insert tries to happen, instead trimming the LAST | |
902 | * block from the directory. | |
903 | */ | |
904 | resblks = XFS_REMOVE_SPACE_RES(mp); | |
905 | error = xfs_trans_reserve(tp, resblks, XFS_REMOVE_LOG_RES(mp), 0, | |
8f112e3b | 906 | XFS_TRANS_PERM_LOG_RES, log_count); |
1da177e4 LT |
907 | if (error == ENOSPC) { |
908 | resblks = 0; | |
909 | error = xfs_trans_reserve(tp, 0, XFS_REMOVE_LOG_RES(mp), 0, | |
8f112e3b | 910 | XFS_TRANS_PERM_LOG_RES, log_count); |
1da177e4 LT |
911 | } |
912 | if (error) { | |
913 | ASSERT(error != ENOSPC); | |
8f112e3b CH |
914 | cancel_flags = 0; |
915 | goto out_trans_cancel; | |
1da177e4 LT |
916 | } |
917 | ||
e1cccd91 | 918 | xfs_lock_two_inodes(dp, ip, XFS_ILOCK_EXCL); |
1da177e4 | 919 | |
ddc3415a CH |
920 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
921 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
1da177e4 | 922 | |
8f112e3b CH |
923 | /* |
924 | * If we're removing a directory perform some additional validation. | |
925 | */ | |
926 | if (is_dir) { | |
927 | ASSERT(ip->i_d.di_nlink >= 2); | |
928 | if (ip->i_d.di_nlink != 2) { | |
929 | error = XFS_ERROR(ENOTEMPTY); | |
930 | goto out_trans_cancel; | |
931 | } | |
932 | if (!xfs_dir_isempty(ip)) { | |
933 | error = XFS_ERROR(ENOTEMPTY); | |
934 | goto out_trans_cancel; | |
935 | } | |
936 | } | |
937 | ||
9d87c319 | 938 | xfs_bmap_init(&free_list, &first_block); |
556b8b16 | 939 | error = xfs_dir_removename(tp, dp, name, ip->i_ino, |
d4377d84 | 940 | &first_block, &free_list, resblks); |
1da177e4 LT |
941 | if (error) { |
942 | ASSERT(error != ENOENT); | |
8f112e3b | 943 | goto out_bmap_cancel; |
1da177e4 | 944 | } |
dcd79a14 | 945 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1da177e4 | 946 | |
8f112e3b CH |
947 | if (is_dir) { |
948 | /* | |
949 | * Drop the link from ip's "..". | |
950 | */ | |
951 | error = xfs_droplink(tp, dp); | |
952 | if (error) | |
953 | goto out_bmap_cancel; | |
954 | ||
955 | /* | |
2b7035fd | 956 | * Drop the "." link from ip to self. |
8f112e3b CH |
957 | */ |
958 | error = xfs_droplink(tp, ip); | |
959 | if (error) | |
960 | goto out_bmap_cancel; | |
961 | } else { | |
962 | /* | |
963 | * When removing a non-directory we need to log the parent | |
26c52951 DC |
964 | * inode here. For a directory this is done implicitly |
965 | * by the xfs_droplink call for the ".." entry. | |
8f112e3b CH |
966 | */ |
967 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
1da177e4 LT |
968 | } |
969 | ||
8f112e3b | 970 | /* |
2b7035fd | 971 | * Drop the link from dp to ip. |
8f112e3b CH |
972 | */ |
973 | error = xfs_droplink(tp, ip); | |
974 | if (error) | |
975 | goto out_bmap_cancel; | |
976 | ||
977 | /* | |
978 | * Determine if this is the last link while | |
1da177e4 LT |
979 | * we are in the transaction. |
980 | */ | |
8f112e3b | 981 | link_zero = (ip->i_d.di_nlink == 0); |
1da177e4 | 982 | |
1da177e4 LT |
983 | /* |
984 | * If this is a synchronous mount, make sure that the | |
985 | * remove transaction goes to disk before returning to | |
986 | * the user. | |
987 | */ | |
8f112e3b | 988 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) |
1da177e4 | 989 | xfs_trans_set_sync(tp); |
1da177e4 | 990 | |
f7c99b6f | 991 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
8f112e3b CH |
992 | if (error) |
993 | goto out_bmap_cancel; | |
1da177e4 | 994 | |
1c72bf90 | 995 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
5df78e73 | 996 | if (error) |
1da177e4 | 997 | goto std_return; |
1da177e4 | 998 | |
2a82b8be DC |
999 | /* |
1000 | * If we are using filestreams, kill the stream association. | |
1001 | * If the file is still open it may get a new one but that | |
1002 | * will get killed on last close in xfs_close() so we don't | |
1003 | * have to worry about that. | |
1004 | */ | |
8f112e3b | 1005 | if (!is_dir && link_zero && xfs_inode_is_filestream(ip)) |
2a82b8be DC |
1006 | xfs_filestream_deassociate(ip); |
1007 | ||
288699fe | 1008 | return 0; |
1da177e4 | 1009 | |
8f112e3b | 1010 | out_bmap_cancel: |
1da177e4 LT |
1011 | xfs_bmap_cancel(&free_list); |
1012 | cancel_flags |= XFS_TRANS_ABORT; | |
8f112e3b | 1013 | out_trans_cancel: |
1da177e4 | 1014 | xfs_trans_cancel(tp, cancel_flags); |
288699fe CH |
1015 | std_return: |
1016 | return error; | |
1da177e4 LT |
1017 | } |
1018 | ||
993386c1 | 1019 | int |
1da177e4 | 1020 | xfs_link( |
993386c1 | 1021 | xfs_inode_t *tdp, |
a3da7896 | 1022 | xfs_inode_t *sip, |
556b8b16 | 1023 | struct xfs_name *target_name) |
1da177e4 | 1024 | { |
993386c1 | 1025 | xfs_mount_t *mp = tdp->i_mount; |
1da177e4 | 1026 | xfs_trans_t *tp; |
1da177e4 LT |
1027 | int error; |
1028 | xfs_bmap_free_t free_list; | |
1029 | xfs_fsblock_t first_block; | |
1030 | int cancel_flags; | |
1031 | int committed; | |
1da177e4 | 1032 | int resblks; |
1da177e4 | 1033 | |
cca28fb8 | 1034 | trace_xfs_link(tdp, target_name); |
1da177e4 | 1035 | |
a3da7896 | 1036 | ASSERT(!S_ISDIR(sip->i_d.di_mode)); |
1da177e4 | 1037 | |
1da177e4 LT |
1038 | if (XFS_FORCED_SHUTDOWN(mp)) |
1039 | return XFS_ERROR(EIO); | |
1040 | ||
7d095257 | 1041 | error = xfs_qm_dqattach(sip, 0); |
cb3f35bb CH |
1042 | if (error) |
1043 | goto std_return; | |
1044 | ||
7d095257 | 1045 | error = xfs_qm_dqattach(tdp, 0); |
1da177e4 LT |
1046 | if (error) |
1047 | goto std_return; | |
1048 | ||
1049 | tp = xfs_trans_alloc(mp, XFS_TRANS_LINK); | |
1050 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
556b8b16 | 1051 | resblks = XFS_LINK_SPACE_RES(mp, target_name->len); |
1da177e4 LT |
1052 | error = xfs_trans_reserve(tp, resblks, XFS_LINK_LOG_RES(mp), 0, |
1053 | XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); | |
1054 | if (error == ENOSPC) { | |
1055 | resblks = 0; | |
1056 | error = xfs_trans_reserve(tp, 0, XFS_LINK_LOG_RES(mp), 0, | |
1057 | XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); | |
1058 | } | |
1059 | if (error) { | |
1060 | cancel_flags = 0; | |
1061 | goto error_return; | |
1062 | } | |
1063 | ||
e1cccd91 | 1064 | xfs_lock_two_inodes(sip, tdp, XFS_ILOCK_EXCL); |
1da177e4 | 1065 | |
ddc3415a CH |
1066 | xfs_trans_ijoin(tp, sip, XFS_ILOCK_EXCL); |
1067 | xfs_trans_ijoin(tp, tdp, XFS_ILOCK_EXCL); | |
1da177e4 | 1068 | |
365ca83d NS |
1069 | /* |
1070 | * If we are using project inheritance, we only allow hard link | |
1071 | * creation in our tree when the project IDs are the same; else | |
1072 | * the tree quota mechanism could be circumvented. | |
1073 | */ | |
1074 | if (unlikely((tdp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && | |
6743099c | 1075 | (xfs_get_projid(tdp) != xfs_get_projid(sip)))) { |
b1ecdda9 | 1076 | error = XFS_ERROR(EXDEV); |
365ca83d NS |
1077 | goto error_return; |
1078 | } | |
1079 | ||
556b8b16 BN |
1080 | error = xfs_dir_canenter(tp, tdp, target_name, resblks); |
1081 | if (error) | |
1da177e4 LT |
1082 | goto error_return; |
1083 | ||
9d87c319 | 1084 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 | 1085 | |
556b8b16 BN |
1086 | error = xfs_dir_createname(tp, tdp, target_name, sip->i_ino, |
1087 | &first_block, &free_list, resblks); | |
1da177e4 LT |
1088 | if (error) |
1089 | goto abort_return; | |
dcd79a14 | 1090 | xfs_trans_ichgtime(tp, tdp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1da177e4 LT |
1091 | xfs_trans_log_inode(tp, tdp, XFS_ILOG_CORE); |
1092 | ||
1093 | error = xfs_bumplink(tp, sip); | |
b71d300c | 1094 | if (error) |
1da177e4 | 1095 | goto abort_return; |
1da177e4 LT |
1096 | |
1097 | /* | |
1098 | * If this is a synchronous mount, make sure that the | |
1099 | * link transaction goes to disk before returning to | |
1100 | * the user. | |
1101 | */ | |
1102 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
1103 | xfs_trans_set_sync(tp); | |
1104 | } | |
1105 | ||
f7c99b6f | 1106 | error = xfs_bmap_finish (&tp, &free_list, &committed); |
1da177e4 LT |
1107 | if (error) { |
1108 | xfs_bmap_cancel(&free_list); | |
1109 | goto abort_return; | |
1110 | } | |
1111 | ||
288699fe | 1112 | return xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
1113 | |
1114 | abort_return: | |
1115 | cancel_flags |= XFS_TRANS_ABORT; | |
1da177e4 LT |
1116 | error_return: |
1117 | xfs_trans_cancel(tp, cancel_flags); | |
288699fe CH |
1118 | std_return: |
1119 | return error; | |
1da177e4 | 1120 | } |
b71d300c | 1121 | |
1da177e4 | 1122 | int |
993386c1 CH |
1123 | xfs_set_dmattrs( |
1124 | xfs_inode_t *ip, | |
1da177e4 | 1125 | u_int evmask, |
993386c1 | 1126 | u_int16_t state) |
1da177e4 | 1127 | { |
993386c1 | 1128 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 | 1129 | xfs_trans_t *tp; |
1da177e4 LT |
1130 | int error; |
1131 | ||
1132 | if (!capable(CAP_SYS_ADMIN)) | |
1133 | return XFS_ERROR(EPERM); | |
1134 | ||
1da177e4 LT |
1135 | if (XFS_FORCED_SHUTDOWN(mp)) |
1136 | return XFS_ERROR(EIO); | |
1137 | ||
1138 | tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS); | |
1139 | error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES (mp), 0, 0, 0); | |
1140 | if (error) { | |
1141 | xfs_trans_cancel(tp, 0); | |
1142 | return error; | |
1143 | } | |
1144 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
ddc3415a | 1145 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
1da177e4 | 1146 | |
613d7043 CH |
1147 | ip->i_d.di_dmevmask = evmask; |
1148 | ip->i_d.di_dmstate = state; | |
1da177e4 LT |
1149 | |
1150 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
1c72bf90 | 1151 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
1152 | |
1153 | return error; | |
1154 | } | |
1155 | ||
1da177e4 LT |
1156 | /* |
1157 | * xfs_alloc_file_space() | |
1158 | * This routine allocates disk space for the given file. | |
1159 | * | |
1160 | * If alloc_type == 0, this request is for an ALLOCSP type | |
1161 | * request which will change the file size. In this case, no | |
1162 | * DMAPI event will be generated by the call. A TRUNCATE event | |
1163 | * will be generated later by xfs_setattr. | |
1164 | * | |
1165 | * If alloc_type != 0, this request is for a RESVSP type | |
1166 | * request, and a DMAPI DM_EVENT_WRITE will be generated if the | |
1167 | * lower block boundary byte address is less than the file's | |
1168 | * length. | |
1169 | * | |
1170 | * RETURNS: | |
1171 | * 0 on success | |
1172 | * errno on error | |
1173 | * | |
1174 | */ | |
ba0f32d4 | 1175 | STATIC int |
1da177e4 LT |
1176 | xfs_alloc_file_space( |
1177 | xfs_inode_t *ip, | |
1178 | xfs_off_t offset, | |
1179 | xfs_off_t len, | |
1180 | int alloc_type, | |
1181 | int attr_flags) | |
1182 | { | |
dd9f438e NS |
1183 | xfs_mount_t *mp = ip->i_mount; |
1184 | xfs_off_t count; | |
1da177e4 LT |
1185 | xfs_filblks_t allocated_fsb; |
1186 | xfs_filblks_t allocatesize_fsb; | |
dd9f438e NS |
1187 | xfs_extlen_t extsz, temp; |
1188 | xfs_fileoff_t startoffset_fsb; | |
1da177e4 | 1189 | xfs_fsblock_t firstfsb; |
dd9f438e | 1190 | int nimaps; |
dd9f438e | 1191 | int quota_flag; |
1da177e4 | 1192 | int rt; |
1da177e4 | 1193 | xfs_trans_t *tp; |
dd9f438e NS |
1194 | xfs_bmbt_irec_t imaps[1], *imapp; |
1195 | xfs_bmap_free_t free_list; | |
1196 | uint qblocks, resblks, resrtextents; | |
1197 | int committed; | |
1198 | int error; | |
1da177e4 | 1199 | |
cca28fb8 | 1200 | trace_xfs_alloc_file_space(ip); |
1da177e4 LT |
1201 | |
1202 | if (XFS_FORCED_SHUTDOWN(mp)) | |
1203 | return XFS_ERROR(EIO); | |
1204 | ||
7d095257 CH |
1205 | error = xfs_qm_dqattach(ip, 0); |
1206 | if (error) | |
1da177e4 LT |
1207 | return error; |
1208 | ||
1209 | if (len <= 0) | |
1210 | return XFS_ERROR(EINVAL); | |
1211 | ||
957d0ebe DC |
1212 | rt = XFS_IS_REALTIME_INODE(ip); |
1213 | extsz = xfs_get_extsz_hint(ip); | |
1214 | ||
1da177e4 | 1215 | count = len; |
1da177e4 | 1216 | imapp = &imaps[0]; |
dd9f438e | 1217 | nimaps = 1; |
1da177e4 LT |
1218 | startoffset_fsb = XFS_B_TO_FSBT(mp, offset); |
1219 | allocatesize_fsb = XFS_B_TO_FSB(mp, count); | |
1220 | ||
1da177e4 | 1221 | /* |
dd9f438e | 1222 | * Allocate file space until done or until there is an error |
1da177e4 | 1223 | */ |
1da177e4 | 1224 | while (allocatesize_fsb && !error) { |
dd9f438e NS |
1225 | xfs_fileoff_t s, e; |
1226 | ||
1da177e4 | 1227 | /* |
3ddb8fa9 | 1228 | * Determine space reservations for data/realtime. |
1da177e4 | 1229 | */ |
dd9f438e | 1230 | if (unlikely(extsz)) { |
1da177e4 | 1231 | s = startoffset_fsb; |
dd9f438e NS |
1232 | do_div(s, extsz); |
1233 | s *= extsz; | |
1234 | e = startoffset_fsb + allocatesize_fsb; | |
1235 | if ((temp = do_mod(startoffset_fsb, extsz))) | |
1236 | e += temp; | |
1237 | if ((temp = do_mod(e, extsz))) | |
1238 | e += extsz - temp; | |
1239 | } else { | |
1240 | s = 0; | |
1241 | e = allocatesize_fsb; | |
1242 | } | |
1243 | ||
72656c46 DC |
1244 | /* |
1245 | * The transaction reservation is limited to a 32-bit block | |
1246 | * count, hence we need to limit the number of blocks we are | |
1247 | * trying to reserve to avoid an overflow. We can't allocate | |
1248 | * more than @nimaps extents, and an extent is limited on disk | |
1249 | * to MAXEXTLEN (21 bits), so use that to enforce the limit. | |
1250 | */ | |
1251 | resblks = min_t(xfs_fileoff_t, (e - s), (MAXEXTLEN * nimaps)); | |
dd9f438e | 1252 | if (unlikely(rt)) { |
72656c46 | 1253 | resrtextents = qblocks = resblks; |
dd9f438e NS |
1254 | resrtextents /= mp->m_sb.sb_rextsize; |
1255 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); | |
1256 | quota_flag = XFS_QMOPT_RES_RTBLKS; | |
1da177e4 | 1257 | } else { |
dd9f438e | 1258 | resrtextents = 0; |
72656c46 | 1259 | resblks = qblocks = XFS_DIOSTRAT_SPACE_RES(mp, resblks); |
dd9f438e | 1260 | quota_flag = XFS_QMOPT_RES_REGBLKS; |
1da177e4 LT |
1261 | } |
1262 | ||
1263 | /* | |
dd9f438e | 1264 | * Allocate and setup the transaction. |
1da177e4 LT |
1265 | */ |
1266 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); | |
dd9f438e NS |
1267 | error = xfs_trans_reserve(tp, resblks, |
1268 | XFS_WRITE_LOG_RES(mp), resrtextents, | |
1da177e4 LT |
1269 | XFS_TRANS_PERM_LOG_RES, |
1270 | XFS_WRITE_LOG_COUNT); | |
1da177e4 | 1271 | /* |
dd9f438e | 1272 | * Check for running out of space |
1da177e4 LT |
1273 | */ |
1274 | if (error) { | |
1275 | /* | |
1276 | * Free the transaction structure. | |
1277 | */ | |
1278 | ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); | |
1279 | xfs_trans_cancel(tp, 0); | |
1280 | break; | |
1281 | } | |
1282 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
7d095257 CH |
1283 | error = xfs_trans_reserve_quota_nblks(tp, ip, qblocks, |
1284 | 0, quota_flag); | |
1da177e4 LT |
1285 | if (error) |
1286 | goto error1; | |
1287 | ||
ddc3415a | 1288 | xfs_trans_ijoin(tp, ip, 0); |
1da177e4 | 1289 | |
9d87c319 | 1290 | xfs_bmap_init(&free_list, &firstfsb); |
c0dc7828 DC |
1291 | error = xfs_bmapi_write(tp, ip, startoffset_fsb, |
1292 | allocatesize_fsb, alloc_type, &firstfsb, | |
1293 | 0, imapp, &nimaps, &free_list); | |
1da177e4 LT |
1294 | if (error) { |
1295 | goto error0; | |
1296 | } | |
1297 | ||
1298 | /* | |
dd9f438e | 1299 | * Complete the transaction |
1da177e4 | 1300 | */ |
f7c99b6f | 1301 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
1302 | if (error) { |
1303 | goto error0; | |
1304 | } | |
1305 | ||
1c72bf90 | 1306 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
1307 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
1308 | if (error) { | |
1309 | break; | |
1310 | } | |
1311 | ||
1312 | allocated_fsb = imapp->br_blockcount; | |
1313 | ||
dd9f438e | 1314 | if (nimaps == 0) { |
1da177e4 LT |
1315 | error = XFS_ERROR(ENOSPC); |
1316 | break; | |
1317 | } | |
1318 | ||
1319 | startoffset_fsb += allocated_fsb; | |
1320 | allocatesize_fsb -= allocated_fsb; | |
1321 | } | |
1da177e4 LT |
1322 | |
1323 | return error; | |
1324 | ||
dd9f438e | 1325 | error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */ |
1da177e4 | 1326 | xfs_bmap_cancel(&free_list); |
ea562ed6 | 1327 | xfs_trans_unreserve_quota_nblks(tp, ip, (long)qblocks, 0, quota_flag); |
dd9f438e NS |
1328 | |
1329 | error1: /* Just cancel transaction */ | |
1da177e4 LT |
1330 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
1331 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
288699fe | 1332 | return error; |
1da177e4 LT |
1333 | } |
1334 | ||
1335 | /* | |
1336 | * Zero file bytes between startoff and endoff inclusive. | |
1337 | * The iolock is held exclusive and no blocks are buffered. | |
2fd6f6ec LM |
1338 | * |
1339 | * This function is used by xfs_free_file_space() to zero | |
1340 | * partial blocks when the range to free is not block aligned. | |
1341 | * When unreserving space with boundaries that are not block | |
1342 | * aligned we round up the start and round down the end | |
1343 | * boundaries and then use this function to zero the parts of | |
1344 | * the blocks that got dropped during the rounding. | |
1da177e4 LT |
1345 | */ |
1346 | STATIC int | |
1347 | xfs_zero_remaining_bytes( | |
1348 | xfs_inode_t *ip, | |
1349 | xfs_off_t startoff, | |
1350 | xfs_off_t endoff) | |
1351 | { | |
1352 | xfs_bmbt_irec_t imap; | |
1353 | xfs_fileoff_t offset_fsb; | |
1354 | xfs_off_t lastoffset; | |
1355 | xfs_off_t offset; | |
1356 | xfs_buf_t *bp; | |
1357 | xfs_mount_t *mp = ip->i_mount; | |
1358 | int nimap; | |
1359 | int error = 0; | |
1360 | ||
2fd6f6ec LM |
1361 | /* |
1362 | * Avoid doing I/O beyond eof - it's not necessary | |
1363 | * since nothing can read beyond eof. The space will | |
1364 | * be zeroed when the file is extended anyway. | |
1365 | */ | |
ce7ae151 | 1366 | if (startoff >= XFS_ISIZE(ip)) |
2fd6f6ec LM |
1367 | return 0; |
1368 | ||
ce7ae151 CH |
1369 | if (endoff > XFS_ISIZE(ip)) |
1370 | endoff = XFS_ISIZE(ip); | |
2fd6f6ec | 1371 | |
686865f7 DC |
1372 | bp = xfs_buf_get_uncached(XFS_IS_REALTIME_INODE(ip) ? |
1373 | mp->m_rtdev_targp : mp->m_ddev_targp, | |
aa5c158e | 1374 | BTOBB(mp->m_sb.sb_blocksize), 0); |
c6422617 LM |
1375 | if (!bp) |
1376 | return XFS_ERROR(ENOMEM); | |
1da177e4 | 1377 | |
c8da0faf CH |
1378 | xfs_buf_unlock(bp); |
1379 | ||
1da177e4 LT |
1380 | for (offset = startoff; offset <= endoff; offset = lastoffset + 1) { |
1381 | offset_fsb = XFS_B_TO_FSBT(mp, offset); | |
1382 | nimap = 1; | |
5c8ed202 | 1383 | error = xfs_bmapi_read(ip, offset_fsb, 1, &imap, &nimap, 0); |
1da177e4 LT |
1384 | if (error || nimap < 1) |
1385 | break; | |
1386 | ASSERT(imap.br_blockcount >= 1); | |
1387 | ASSERT(imap.br_startoff == offset_fsb); | |
1388 | lastoffset = XFS_FSB_TO_B(mp, imap.br_startoff + 1) - 1; | |
1389 | if (lastoffset > endoff) | |
1390 | lastoffset = endoff; | |
1391 | if (imap.br_startblock == HOLESTARTBLOCK) | |
1392 | continue; | |
1393 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
1394 | if (imap.br_state == XFS_EXT_UNWRITTEN) | |
1395 | continue; | |
1396 | XFS_BUF_UNDONE(bp); | |
1397 | XFS_BUF_UNWRITE(bp); | |
1398 | XFS_BUF_READ(bp); | |
9d87c319 | 1399 | XFS_BUF_SET_ADDR(bp, xfs_fsb_to_db(ip, imap.br_startblock)); |
1da177e4 | 1400 | xfsbdstrat(mp, bp); |
1a1a3e97 | 1401 | error = xfs_buf_iowait(bp); |
d64e31a2 | 1402 | if (error) { |
901796af CH |
1403 | xfs_buf_ioerror_alert(bp, |
1404 | "xfs_zero_remaining_bytes(read)"); | |
1da177e4 LT |
1405 | break; |
1406 | } | |
62926044 | 1407 | memset(bp->b_addr + |
1da177e4 LT |
1408 | (offset - XFS_FSB_TO_B(mp, imap.br_startoff)), |
1409 | 0, lastoffset - offset + 1); | |
1410 | XFS_BUF_UNDONE(bp); | |
1411 | XFS_BUF_UNREAD(bp); | |
1412 | XFS_BUF_WRITE(bp); | |
1413 | xfsbdstrat(mp, bp); | |
1a1a3e97 | 1414 | error = xfs_buf_iowait(bp); |
d64e31a2 | 1415 | if (error) { |
901796af CH |
1416 | xfs_buf_ioerror_alert(bp, |
1417 | "xfs_zero_remaining_bytes(write)"); | |
1da177e4 LT |
1418 | break; |
1419 | } | |
1420 | } | |
1421 | xfs_buf_free(bp); | |
1422 | return error; | |
1423 | } | |
1424 | ||
1425 | /* | |
1426 | * xfs_free_file_space() | |
1427 | * This routine frees disk space for the given file. | |
1428 | * | |
1429 | * This routine is only called by xfs_change_file_space | |
1430 | * for an UNRESVSP type call. | |
1431 | * | |
1432 | * RETURNS: | |
1433 | * 0 on success | |
1434 | * errno on error | |
1435 | * | |
1436 | */ | |
1437 | STATIC int | |
1438 | xfs_free_file_space( | |
1439 | xfs_inode_t *ip, | |
1440 | xfs_off_t offset, | |
1441 | xfs_off_t len, | |
1442 | int attr_flags) | |
1443 | { | |
1444 | int committed; | |
1445 | int done; | |
1da177e4 LT |
1446 | xfs_fileoff_t endoffset_fsb; |
1447 | int error; | |
1448 | xfs_fsblock_t firstfsb; | |
1449 | xfs_bmap_free_t free_list; | |
1da177e4 LT |
1450 | xfs_bmbt_irec_t imap; |
1451 | xfs_off_t ioffset; | |
1452 | xfs_extlen_t mod=0; | |
1453 | xfs_mount_t *mp; | |
1454 | int nimap; | |
1455 | uint resblks; | |
673cdf5c | 1456 | uint rounding; |
1da177e4 LT |
1457 | int rt; |
1458 | xfs_fileoff_t startoffset_fsb; | |
1459 | xfs_trans_t *tp; | |
5fcbab35 | 1460 | int need_iolock = 1; |
1da177e4 | 1461 | |
1da177e4 LT |
1462 | mp = ip->i_mount; |
1463 | ||
cca28fb8 | 1464 | trace_xfs_free_file_space(ip); |
bd5a876a | 1465 | |
7d095257 CH |
1466 | error = xfs_qm_dqattach(ip, 0); |
1467 | if (error) | |
1da177e4 LT |
1468 | return error; |
1469 | ||
1470 | error = 0; | |
1471 | if (len <= 0) /* if nothing being freed */ | |
1472 | return error; | |
71ddabb9 | 1473 | rt = XFS_IS_REALTIME_INODE(ip); |
1da177e4 | 1474 | startoffset_fsb = XFS_B_TO_FSB(mp, offset); |
288699fe | 1475 | endoffset_fsb = XFS_B_TO_FSBT(mp, offset + len); |
1da177e4 | 1476 | |
0f285c8a | 1477 | if (attr_flags & XFS_ATTR_NOLOCK) |
5fcbab35 | 1478 | need_iolock = 0; |
9fa8046f | 1479 | if (need_iolock) { |
1da177e4 | 1480 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
25e41b3d | 1481 | /* wait for the completion of any pending DIOs */ |
4a06fd26 | 1482 | inode_dio_wait(VFS_I(ip)); |
9fa8046f | 1483 | } |
5fcbab35 | 1484 | |
e6a4b37f | 1485 | rounding = max_t(uint, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE); |
1da177e4 | 1486 | ioffset = offset & ~(rounding - 1); |
fb595814 DC |
1487 | error = -filemap_write_and_wait_range(VFS_I(ip)->i_mapping, |
1488 | ioffset, -1); | |
1489 | if (error) | |
1490 | goto out_unlock_iolock; | |
1491 | truncate_pagecache_range(VFS_I(ip), ioffset, -1); | |
bd5a876a | 1492 | |
1da177e4 LT |
1493 | /* |
1494 | * Need to zero the stuff we're not freeing, on disk. | |
9da096fd | 1495 | * If it's a realtime file & can't use unwritten extents then we |
1da177e4 LT |
1496 | * actually need to zero the extent edges. Otherwise xfs_bunmapi |
1497 | * will take care of it for us. | |
1498 | */ | |
62118709 | 1499 | if (rt && !xfs_sb_version_hasextflgbit(&mp->m_sb)) { |
1da177e4 | 1500 | nimap = 1; |
5c8ed202 DC |
1501 | error = xfs_bmapi_read(ip, startoffset_fsb, 1, |
1502 | &imap, &nimap, 0); | |
1da177e4 LT |
1503 | if (error) |
1504 | goto out_unlock_iolock; | |
1505 | ASSERT(nimap == 0 || nimap == 1); | |
1506 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { | |
1507 | xfs_daddr_t block; | |
1508 | ||
1509 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
1510 | block = imap.br_startblock; | |
1511 | mod = do_div(block, mp->m_sb.sb_rextsize); | |
1512 | if (mod) | |
1513 | startoffset_fsb += mp->m_sb.sb_rextsize - mod; | |
1514 | } | |
1515 | nimap = 1; | |
5c8ed202 DC |
1516 | error = xfs_bmapi_read(ip, endoffset_fsb - 1, 1, |
1517 | &imap, &nimap, 0); | |
1da177e4 LT |
1518 | if (error) |
1519 | goto out_unlock_iolock; | |
1520 | ASSERT(nimap == 0 || nimap == 1); | |
1521 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { | |
1522 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
1523 | mod++; | |
1524 | if (mod && (mod != mp->m_sb.sb_rextsize)) | |
1525 | endoffset_fsb -= mod; | |
1526 | } | |
1527 | } | |
1528 | if ((done = (endoffset_fsb <= startoffset_fsb))) | |
1529 | /* | |
1530 | * One contiguous piece to clear | |
1531 | */ | |
1532 | error = xfs_zero_remaining_bytes(ip, offset, offset + len - 1); | |
1533 | else { | |
1534 | /* | |
1535 | * Some full blocks, possibly two pieces to clear | |
1536 | */ | |
1537 | if (offset < XFS_FSB_TO_B(mp, startoffset_fsb)) | |
1538 | error = xfs_zero_remaining_bytes(ip, offset, | |
1539 | XFS_FSB_TO_B(mp, startoffset_fsb) - 1); | |
1540 | if (!error && | |
1541 | XFS_FSB_TO_B(mp, endoffset_fsb) < offset + len) | |
1542 | error = xfs_zero_remaining_bytes(ip, | |
1543 | XFS_FSB_TO_B(mp, endoffset_fsb), | |
1544 | offset + len - 1); | |
1545 | } | |
1546 | ||
1547 | /* | |
1548 | * free file space until done or until there is an error | |
1549 | */ | |
1550 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); | |
1551 | while (!error && !done) { | |
1552 | ||
1553 | /* | |
91ebecc7 DC |
1554 | * allocate and setup the transaction. Allow this |
1555 | * transaction to dip into the reserve blocks to ensure | |
1556 | * the freeing of the space succeeds at ENOSPC. | |
1da177e4 LT |
1557 | */ |
1558 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); | |
91ebecc7 | 1559 | tp->t_flags |= XFS_TRANS_RESERVE; |
1da177e4 LT |
1560 | error = xfs_trans_reserve(tp, |
1561 | resblks, | |
1562 | XFS_WRITE_LOG_RES(mp), | |
1563 | 0, | |
1564 | XFS_TRANS_PERM_LOG_RES, | |
1565 | XFS_WRITE_LOG_COUNT); | |
1566 | ||
1567 | /* | |
1568 | * check for running out of space | |
1569 | */ | |
1570 | if (error) { | |
1571 | /* | |
1572 | * Free the transaction structure. | |
1573 | */ | |
1574 | ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); | |
1575 | xfs_trans_cancel(tp, 0); | |
1576 | break; | |
1577 | } | |
1578 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
7d095257 CH |
1579 | error = xfs_trans_reserve_quota(tp, mp, |
1580 | ip->i_udquot, ip->i_gdquot, | |
1581 | resblks, 0, XFS_QMOPT_RES_REGBLKS); | |
1da177e4 LT |
1582 | if (error) |
1583 | goto error1; | |
1584 | ||
ddc3415a | 1585 | xfs_trans_ijoin(tp, ip, 0); |
1da177e4 LT |
1586 | |
1587 | /* | |
1588 | * issue the bunmapi() call to free the blocks | |
1589 | */ | |
9d87c319 | 1590 | xfs_bmap_init(&free_list, &firstfsb); |
541d7d3c | 1591 | error = xfs_bunmapi(tp, ip, startoffset_fsb, |
1da177e4 | 1592 | endoffset_fsb - startoffset_fsb, |
b4e9181e | 1593 | 0, 2, &firstfsb, &free_list, &done); |
1da177e4 LT |
1594 | if (error) { |
1595 | goto error0; | |
1596 | } | |
1597 | ||
1598 | /* | |
1599 | * complete the transaction | |
1600 | */ | |
f7c99b6f | 1601 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
1602 | if (error) { |
1603 | goto error0; | |
1604 | } | |
1605 | ||
1c72bf90 | 1606 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
1607 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
1608 | } | |
1609 | ||
1610 | out_unlock_iolock: | |
1611 | if (need_iolock) | |
1612 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
1613 | return error; | |
1614 | ||
1615 | error0: | |
1616 | xfs_bmap_cancel(&free_list); | |
1617 | error1: | |
1618 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
1619 | xfs_iunlock(ip, need_iolock ? (XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL) : | |
1620 | XFS_ILOCK_EXCL); | |
1621 | return error; | |
1622 | } | |
1623 | ||
ef9d8733 DC |
1624 | |
1625 | STATIC int | |
1626 | xfs_zero_file_space( | |
1627 | struct xfs_inode *ip, | |
1628 | xfs_off_t offset, | |
1629 | xfs_off_t len, | |
1630 | int attr_flags) | |
1631 | { | |
1632 | struct xfs_mount *mp = ip->i_mount; | |
1633 | uint granularity; | |
1634 | xfs_off_t start_boundary; | |
1635 | xfs_off_t end_boundary; | |
1636 | int error; | |
1637 | ||
1638 | granularity = max_t(uint, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE); | |
1639 | ||
1640 | /* | |
1641 | * Round the range of extents we are going to convert inwards. If the | |
1642 | * offset is aligned, then it doesn't get changed so we zero from the | |
1643 | * start of the block offset points to. | |
1644 | */ | |
1645 | start_boundary = round_up(offset, granularity); | |
1646 | end_boundary = round_down(offset + len, granularity); | |
1647 | ||
1648 | ASSERT(start_boundary >= offset); | |
1649 | ASSERT(end_boundary <= offset + len); | |
1650 | ||
1651 | if (!(attr_flags & XFS_ATTR_NOLOCK)) | |
1652 | xfs_ilock(ip, XFS_IOLOCK_EXCL); | |
1653 | ||
1654 | if (start_boundary < end_boundary - 1) { | |
1655 | /* punch out the page cache over the conversion range */ | |
1656 | truncate_pagecache_range(VFS_I(ip), start_boundary, | |
1657 | end_boundary - 1); | |
1658 | /* convert the blocks */ | |
1659 | error = xfs_alloc_file_space(ip, start_boundary, | |
1660 | end_boundary - start_boundary - 1, | |
1661 | XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT, | |
1662 | attr_flags); | |
1663 | if (error) | |
1664 | goto out_unlock; | |
1665 | ||
1666 | /* We've handled the interior of the range, now for the edges */ | |
1667 | if (start_boundary != offset) | |
1668 | error = xfs_iozero(ip, offset, start_boundary - offset); | |
1669 | if (error) | |
1670 | goto out_unlock; | |
1671 | ||
1672 | if (end_boundary != offset + len) | |
1673 | error = xfs_iozero(ip, end_boundary, | |
1674 | offset + len - end_boundary); | |
1675 | ||
1676 | } else { | |
1677 | /* | |
1678 | * It's either a sub-granularity range or the range spanned lies | |
1679 | * partially across two adjacent blocks. | |
1680 | */ | |
1681 | error = xfs_iozero(ip, offset, len); | |
1682 | } | |
1683 | ||
1684 | out_unlock: | |
1685 | if (!(attr_flags & XFS_ATTR_NOLOCK)) | |
1686 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
1687 | return error; | |
1688 | ||
1689 | } | |
1690 | ||
1da177e4 LT |
1691 | /* |
1692 | * xfs_change_file_space() | |
1693 | * This routine allocates or frees disk space for the given file. | |
1694 | * The user specified parameters are checked for alignment and size | |
1695 | * limitations. | |
1696 | * | |
1697 | * RETURNS: | |
1698 | * 0 on success | |
1699 | * errno on error | |
1700 | * | |
1701 | */ | |
1702 | int | |
1703 | xfs_change_file_space( | |
993386c1 | 1704 | xfs_inode_t *ip, |
1da177e4 LT |
1705 | int cmd, |
1706 | xfs_flock64_t *bf, | |
1707 | xfs_off_t offset, | |
1da177e4 LT |
1708 | int attr_flags) |
1709 | { | |
993386c1 | 1710 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 LT |
1711 | int clrprealloc; |
1712 | int error; | |
1713 | xfs_fsize_t fsize; | |
1da177e4 LT |
1714 | int setprealloc; |
1715 | xfs_off_t startoffset; | |
1da177e4 | 1716 | xfs_trans_t *tp; |
0f285c8a | 1717 | struct iattr iattr; |
1da177e4 | 1718 | |
993386c1 | 1719 | if (!S_ISREG(ip->i_d.di_mode)) |
1da177e4 LT |
1720 | return XFS_ERROR(EINVAL); |
1721 | ||
1da177e4 LT |
1722 | switch (bf->l_whence) { |
1723 | case 0: /*SEEK_SET*/ | |
1724 | break; | |
1725 | case 1: /*SEEK_CUR*/ | |
1726 | bf->l_start += offset; | |
1727 | break; | |
1728 | case 2: /*SEEK_END*/ | |
ce7ae151 | 1729 | bf->l_start += XFS_ISIZE(ip); |
1da177e4 LT |
1730 | break; |
1731 | default: | |
1732 | return XFS_ERROR(EINVAL); | |
1733 | } | |
1734 | ||
f5b8911b DC |
1735 | /* |
1736 | * length of <= 0 for resv/unresv/zero is invalid. length for | |
1737 | * alloc/free is ignored completely and we have no idea what userspace | |
1738 | * might have set it to, so set it to zero to allow range | |
1739 | * checks to pass. | |
1740 | */ | |
1741 | switch (cmd) { | |
1742 | case XFS_IOC_ZERO_RANGE: | |
1743 | case XFS_IOC_RESVSP: | |
1744 | case XFS_IOC_RESVSP64: | |
1745 | case XFS_IOC_UNRESVSP: | |
1746 | case XFS_IOC_UNRESVSP64: | |
1747 | if (bf->l_len <= 0) | |
1748 | return XFS_ERROR(EINVAL); | |
1749 | break; | |
1750 | default: | |
1751 | bf->l_len = 0; | |
1752 | break; | |
1753 | } | |
1da177e4 | 1754 | |
32972383 DC |
1755 | if (bf->l_start < 0 || |
1756 | bf->l_start > mp->m_super->s_maxbytes || | |
f5b8911b DC |
1757 | bf->l_start + bf->l_len < 0 || |
1758 | bf->l_start + bf->l_len >= mp->m_super->s_maxbytes) | |
1da177e4 LT |
1759 | return XFS_ERROR(EINVAL); |
1760 | ||
1761 | bf->l_whence = 0; | |
1762 | ||
1763 | startoffset = bf->l_start; | |
ce7ae151 | 1764 | fsize = XFS_ISIZE(ip); |
1da177e4 | 1765 | |
1da177e4 | 1766 | setprealloc = clrprealloc = 0; |
1da177e4 | 1767 | switch (cmd) { |
44722352 | 1768 | case XFS_IOC_ZERO_RANGE: |
ef9d8733 DC |
1769 | error = xfs_zero_file_space(ip, startoffset, bf->l_len, |
1770 | attr_flags); | |
1771 | if (error) | |
1772 | return error; | |
1773 | setprealloc = 1; | |
1774 | break; | |
1775 | ||
1da177e4 LT |
1776 | case XFS_IOC_RESVSP: |
1777 | case XFS_IOC_RESVSP64: | |
1778 | error = xfs_alloc_file_space(ip, startoffset, bf->l_len, | |
ef9d8733 | 1779 | XFS_BMAPI_PREALLOC, attr_flags); |
1da177e4 LT |
1780 | if (error) |
1781 | return error; | |
1782 | setprealloc = 1; | |
1783 | break; | |
1784 | ||
1785 | case XFS_IOC_UNRESVSP: | |
1786 | case XFS_IOC_UNRESVSP64: | |
1787 | if ((error = xfs_free_file_space(ip, startoffset, bf->l_len, | |
1788 | attr_flags))) | |
1789 | return error; | |
1790 | break; | |
1791 | ||
1792 | case XFS_IOC_ALLOCSP: | |
1793 | case XFS_IOC_ALLOCSP64: | |
1794 | case XFS_IOC_FREESP: | |
1795 | case XFS_IOC_FREESP64: | |
bc4010ec DC |
1796 | /* |
1797 | * These operations actually do IO when extending the file, but | |
1798 | * the allocation is done seperately to the zeroing that is | |
1799 | * done. This set of operations need to be serialised against | |
1800 | * other IO operations, such as truncate and buffered IO. We | |
1801 | * need to take the IOLOCK here to serialise the allocation and | |
1802 | * zeroing IO to prevent other IOLOCK holders (e.g. getbmap, | |
1803 | * truncate, direct IO) from racing against the transient | |
1804 | * allocated but not written state we can have here. | |
1805 | */ | |
1806 | xfs_ilock(ip, XFS_IOLOCK_EXCL); | |
1da177e4 LT |
1807 | if (startoffset > fsize) { |
1808 | error = xfs_alloc_file_space(ip, fsize, | |
bc4010ec DC |
1809 | startoffset - fsize, 0, |
1810 | attr_flags | XFS_ATTR_NOLOCK); | |
1811 | if (error) { | |
1812 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
1da177e4 | 1813 | break; |
bc4010ec | 1814 | } |
1da177e4 LT |
1815 | } |
1816 | ||
0f285c8a CH |
1817 | iattr.ia_valid = ATTR_SIZE; |
1818 | iattr.ia_size = startoffset; | |
1da177e4 | 1819 | |
bc4010ec DC |
1820 | error = xfs_setattr_size(ip, &iattr, |
1821 | attr_flags | XFS_ATTR_NOLOCK); | |
1822 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
1da177e4 LT |
1823 | |
1824 | if (error) | |
1825 | return error; | |
1826 | ||
1827 | clrprealloc = 1; | |
1828 | break; | |
1829 | ||
1830 | default: | |
1831 | ASSERT(0); | |
1832 | return XFS_ERROR(EINVAL); | |
1833 | } | |
1834 | ||
1835 | /* | |
1836 | * update the inode timestamp, mode, and prealloc flag bits | |
1837 | */ | |
1838 | tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID); | |
1839 | ||
1840 | if ((error = xfs_trans_reserve(tp, 0, XFS_WRITEID_LOG_RES(mp), | |
1841 | 0, 0, 0))) { | |
1842 | /* ASSERT(0); */ | |
1843 | xfs_trans_cancel(tp, 0); | |
1844 | return error; | |
1845 | } | |
1846 | ||
1847 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
ddc3415a | 1848 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
1da177e4 | 1849 | |
0f285c8a | 1850 | if ((attr_flags & XFS_ATTR_DMI) == 0) { |
1da177e4 LT |
1851 | ip->i_d.di_mode &= ~S_ISUID; |
1852 | ||
1853 | /* | |
1854 | * Note that we don't have to worry about mandatory | |
1855 | * file locking being disabled here because we only | |
1856 | * clear the S_ISGID bit if the Group execute bit is | |
1857 | * on, but if it was on then mandatory locking wouldn't | |
1858 | * have been enabled. | |
1859 | */ | |
1860 | if (ip->i_d.di_mode & S_IXGRP) | |
1861 | ip->i_d.di_mode &= ~S_ISGID; | |
1862 | ||
dcd79a14 | 1863 | xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1da177e4 LT |
1864 | } |
1865 | if (setprealloc) | |
1866 | ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC; | |
1867 | else if (clrprealloc) | |
1868 | ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC; | |
1869 | ||
1870 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
82878897 DC |
1871 | if (attr_flags & XFS_ATTR_SYNC) |
1872 | xfs_trans_set_sync(tp); | |
23bb0be1 | 1873 | return xfs_trans_commit(tp, 0); |
1da177e4 | 1874 | } |