Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
3e57ecf6 | 2 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
7b718769 | 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 | */ |
16f7e0fe | 18 | |
1da177e4 | 19 | #include "xfs.h" |
a844f451 | 20 | #include "xfs_fs.h" |
1da177e4 | 21 | #include "xfs_types.h" |
a844f451 | 22 | #include "xfs_bit.h" |
1da177e4 | 23 | #include "xfs_log.h" |
a844f451 | 24 | #include "xfs_inum.h" |
1da177e4 LT |
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 LT |
41 | #include "xfs_attr.h" |
42 | #include "xfs_rw.h" | |
1da177e4 | 43 | #include "xfs_error.h" |
1da177e4 LT |
44 | #include "xfs_quota.h" |
45 | #include "xfs_utils.h" | |
a844f451 | 46 | #include "xfs_rtalloc.h" |
1da177e4 | 47 | #include "xfs_trans_space.h" |
1da177e4 | 48 | #include "xfs_log_priv.h" |
2a82b8be | 49 | #include "xfs_filestream.h" |
993386c1 | 50 | #include "xfs_vnodeops.h" |
0b1b213f | 51 | #include "xfs_trace.h" |
1da177e4 | 52 | |
7d4fb40a NS |
53 | /* |
54 | * The maximum pathlen is 1024 bytes. Since the minimum file system | |
55 | * blocksize is 512 bytes, we can get a max of 2 extents back from | |
56 | * bmapi. | |
57 | */ | |
58 | #define SYMLINK_MAPS 2 | |
59 | ||
804c83c3 CH |
60 | STATIC int |
61 | xfs_readlink_bmap( | |
62 | xfs_inode_t *ip, | |
63 | char *link) | |
64 | { | |
65 | xfs_mount_t *mp = ip->i_mount; | |
66 | int pathlen = ip->i_d.di_size; | |
67 | int nmaps = SYMLINK_MAPS; | |
68 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; | |
69 | xfs_daddr_t d; | |
70 | int byte_cnt; | |
71 | int n; | |
72 | xfs_buf_t *bp; | |
73 | int error = 0; | |
74 | ||
5c8ed202 DC |
75 | error = xfs_bmapi_read(ip, 0, XFS_B_TO_FSB(mp, pathlen), mval, &nmaps, |
76 | 0); | |
804c83c3 CH |
77 | if (error) |
78 | goto out; | |
79 | ||
80 | for (n = 0; n < nmaps; n++) { | |
81 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); | |
82 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
83 | ||
6ad112bf CH |
84 | bp = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt), |
85 | XBF_LOCK | XBF_MAPPED | XBF_DONT_BLOCK); | |
ac4d6888 CS |
86 | if (!bp) |
87 | return XFS_ERROR(ENOMEM); | |
e5702805 | 88 | error = bp->b_error; |
804c83c3 CH |
89 | if (error) { |
90 | xfs_ioerror_alert("xfs_readlink", | |
91 | ip->i_mount, bp, XFS_BUF_ADDR(bp)); | |
92 | xfs_buf_relse(bp); | |
93 | goto out; | |
94 | } | |
95 | if (pathlen < byte_cnt) | |
96 | byte_cnt = pathlen; | |
97 | pathlen -= byte_cnt; | |
98 | ||
62926044 | 99 | memcpy(link, bp->b_addr, byte_cnt); |
804c83c3 CH |
100 | xfs_buf_relse(bp); |
101 | } | |
102 | ||
103 | link[ip->i_d.di_size] = '\0'; | |
104 | error = 0; | |
105 | ||
106 | out: | |
107 | return error; | |
108 | } | |
109 | ||
993386c1 | 110 | int |
1da177e4 | 111 | xfs_readlink( |
993386c1 | 112 | xfs_inode_t *ip, |
804c83c3 | 113 | char *link) |
1da177e4 | 114 | { |
804c83c3 | 115 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 | 116 | int pathlen; |
1da177e4 | 117 | int error = 0; |
1da177e4 | 118 | |
cca28fb8 | 119 | trace_xfs_readlink(ip); |
1da177e4 LT |
120 | |
121 | if (XFS_FORCED_SHUTDOWN(mp)) | |
122 | return XFS_ERROR(EIO); | |
123 | ||
124 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
125 | ||
abbede1b | 126 | ASSERT(S_ISLNK(ip->i_d.di_mode)); |
804c83c3 | 127 | ASSERT(ip->i_d.di_size <= MAXPATHLEN); |
1da177e4 | 128 | |
804c83c3 CH |
129 | pathlen = ip->i_d.di_size; |
130 | if (!pathlen) | |
131 | goto out; | |
1da177e4 LT |
132 | |
133 | if (ip->i_df.if_flags & XFS_IFINLINE) { | |
804c83c3 CH |
134 | memcpy(link, ip->i_df.if_u1.if_data, pathlen); |
135 | link[pathlen] = '\0'; | |
136 | } else { | |
137 | error = xfs_readlink_bmap(ip, link); | |
1da177e4 LT |
138 | } |
139 | ||
804c83c3 | 140 | out: |
1da177e4 | 141 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
1da177e4 LT |
142 | return error; |
143 | } | |
144 | ||
c56c9631 CH |
145 | /* |
146 | * Flags for xfs_free_eofblocks | |
147 | */ | |
148 | #define XFS_FREE_EOF_TRYLOCK (1<<0) | |
149 | ||
1da177e4 | 150 | /* |
92dfe8d2 DC |
151 | * This is called by xfs_inactive to free any blocks beyond eof |
152 | * when the link count isn't zero and by xfs_dm_punch_hole() when | |
153 | * punching a hole to EOF. | |
1da177e4 | 154 | */ |
d96f8f89 | 155 | STATIC int |
92dfe8d2 | 156 | xfs_free_eofblocks( |
1da177e4 | 157 | xfs_mount_t *mp, |
92dfe8d2 DC |
158 | xfs_inode_t *ip, |
159 | int flags) | |
1da177e4 LT |
160 | { |
161 | xfs_trans_t *tp; | |
162 | int error; | |
163 | xfs_fileoff_t end_fsb; | |
164 | xfs_fileoff_t last_fsb; | |
165 | xfs_filblks_t map_len; | |
166 | int nimaps; | |
167 | xfs_bmbt_irec_t imap; | |
168 | ||
169 | /* | |
170 | * Figure out if there are any blocks beyond the end | |
171 | * of the file. If not, then there is nothing to do. | |
172 | */ | |
ba87ea69 | 173 | end_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)ip->i_size)); |
1da177e4 | 174 | last_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp)); |
3f34885c | 175 | if (last_fsb <= end_fsb) |
014c2544 | 176 | return 0; |
3f34885c | 177 | map_len = last_fsb - end_fsb; |
1da177e4 LT |
178 | |
179 | nimaps = 1; | |
180 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
5c8ed202 | 181 | error = xfs_bmapi_read(ip, end_fsb, map_len, &imap, &nimaps, 0); |
1da177e4 LT |
182 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
183 | ||
184 | if (!error && (nimaps != 0) && | |
68bdb6ea YL |
185 | (imap.br_startblock != HOLESTARTBLOCK || |
186 | ip->i_delayed_blks)) { | |
1da177e4 LT |
187 | /* |
188 | * Attach the dquots to the inode up front. | |
189 | */ | |
7d095257 CH |
190 | error = xfs_qm_dqattach(ip, 0); |
191 | if (error) | |
014c2544 | 192 | return error; |
1da177e4 LT |
193 | |
194 | /* | |
195 | * There are blocks after the end of file. | |
196 | * Free them up now by truncating the file to | |
197 | * its current size. | |
198 | */ | |
199 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
200 | ||
c56c9631 CH |
201 | if (flags & XFS_FREE_EOF_TRYLOCK) { |
202 | if (!xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL)) { | |
203 | xfs_trans_cancel(tp, 0); | |
204 | return 0; | |
205 | } | |
206 | } else { | |
92dfe8d2 | 207 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
c56c9631 | 208 | } |
1da177e4 LT |
209 | |
210 | error = xfs_trans_reserve(tp, 0, | |
211 | XFS_ITRUNCATE_LOG_RES(mp), | |
212 | 0, XFS_TRANS_PERM_LOG_RES, | |
213 | XFS_ITRUNCATE_LOG_COUNT); | |
214 | if (error) { | |
215 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
216 | xfs_trans_cancel(tp, 0); | |
217 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
014c2544 | 218 | return error; |
1da177e4 LT |
219 | } |
220 | ||
221 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
898621d5 | 222 | xfs_trans_ijoin(tp, ip); |
1da177e4 | 223 | |
8f04c47a | 224 | error = xfs_itruncate_data(&tp, ip, ip->i_size); |
1da177e4 | 225 | if (error) { |
8f04c47a CH |
226 | /* |
227 | * If we get an error at this point we simply don't | |
228 | * bother truncating the file. | |
229 | */ | |
1da177e4 LT |
230 | xfs_trans_cancel(tp, |
231 | (XFS_TRANS_RELEASE_LOG_RES | | |
232 | XFS_TRANS_ABORT)); | |
233 | } else { | |
234 | error = xfs_trans_commit(tp, | |
1c72bf90 | 235 | XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 | 236 | } |
c56c9631 | 237 | xfs_iunlock(ip, XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL); |
1da177e4 | 238 | } |
014c2544 | 239 | return error; |
1da177e4 LT |
240 | } |
241 | ||
242 | /* | |
243 | * Free a symlink that has blocks associated with it. | |
244 | */ | |
245 | STATIC int | |
246 | xfs_inactive_symlink_rmt( | |
247 | xfs_inode_t *ip, | |
248 | xfs_trans_t **tpp) | |
249 | { | |
250 | xfs_buf_t *bp; | |
251 | int committed; | |
252 | int done; | |
253 | int error; | |
254 | xfs_fsblock_t first_block; | |
255 | xfs_bmap_free_t free_list; | |
256 | int i; | |
257 | xfs_mount_t *mp; | |
258 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; | |
259 | int nmaps; | |
260 | xfs_trans_t *ntp; | |
261 | int size; | |
262 | xfs_trans_t *tp; | |
263 | ||
264 | tp = *tpp; | |
265 | mp = ip->i_mount; | |
266 | ASSERT(ip->i_d.di_size > XFS_IFORK_DSIZE(ip)); | |
267 | /* | |
268 | * We're freeing a symlink that has some | |
269 | * blocks allocated to it. Free the | |
270 | * blocks here. We know that we've got | |
271 | * either 1 or 2 extents and that we can | |
272 | * free them all in one bunmapi call. | |
273 | */ | |
274 | ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2); | |
275 | if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, | |
276 | XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) { | |
277 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
278 | xfs_trans_cancel(tp, 0); | |
279 | *tpp = NULL; | |
280 | return error; | |
281 | } | |
282 | /* | |
283 | * Lock the inode, fix the size, and join it to the transaction. | |
284 | * Hold it so in the normal path, we still have it locked for | |
285 | * the second transaction. In the error paths we need it | |
286 | * held so the cancel won't rele it, see below. | |
287 | */ | |
288 | xfs_ilock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
289 | size = (int)ip->i_d.di_size; | |
290 | ip->i_d.di_size = 0; | |
898621d5 | 291 | xfs_trans_ijoin(tp, ip); |
1da177e4 LT |
292 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
293 | /* | |
294 | * Find the block(s) so we can inval and unmap them. | |
295 | */ | |
296 | done = 0; | |
9d87c319 | 297 | xfs_bmap_init(&free_list, &first_block); |
e8c96f8c | 298 | nmaps = ARRAY_SIZE(mval); |
5c8ed202 DC |
299 | error = xfs_bmapi_read(ip, 0, XFS_B_TO_FSB(mp, size), |
300 | mval, &nmaps, 0); | |
301 | if (error) | |
1da177e4 LT |
302 | goto error0; |
303 | /* | |
304 | * Invalidate the block(s). | |
305 | */ | |
306 | for (i = 0; i < nmaps; i++) { | |
307 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, | |
308 | XFS_FSB_TO_DADDR(mp, mval[i].br_startblock), | |
309 | XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0); | |
2a30f36d CS |
310 | if (!bp) { |
311 | error = ENOMEM; | |
312 | goto error1; | |
313 | } | |
1da177e4 LT |
314 | xfs_trans_binval(tp, bp); |
315 | } | |
316 | /* | |
317 | * Unmap the dead block(s) to the free_list. | |
318 | */ | |
319 | if ((error = xfs_bunmapi(tp, ip, 0, size, XFS_BMAPI_METADATA, nmaps, | |
b4e9181e | 320 | &first_block, &free_list, &done))) |
1da177e4 LT |
321 | goto error1; |
322 | ASSERT(done); | |
323 | /* | |
324 | * Commit the first transaction. This logs the EFI and the inode. | |
325 | */ | |
f7c99b6f | 326 | if ((error = xfs_bmap_finish(&tp, &free_list, &committed))) |
1da177e4 LT |
327 | goto error1; |
328 | /* | |
329 | * The transaction must have been committed, since there were | |
330 | * actually extents freed by xfs_bunmapi. See xfs_bmap_finish. | |
331 | * The new tp has the extent freeing and EFDs. | |
332 | */ | |
333 | ASSERT(committed); | |
334 | /* | |
335 | * The first xact was committed, so add the inode to the new one. | |
336 | * Mark it dirty so it will be logged and moved forward in the log as | |
337 | * part of every commit. | |
338 | */ | |
898621d5 | 339 | xfs_trans_ijoin(tp, ip); |
1da177e4 LT |
340 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
341 | /* | |
342 | * Get a new, empty transaction to return to our caller. | |
343 | */ | |
344 | ntp = xfs_trans_dup(tp); | |
345 | /* | |
c41564b5 | 346 | * Commit the transaction containing extent freeing and EFDs. |
1da177e4 LT |
347 | * If we get an error on the commit here or on the reserve below, |
348 | * we need to unlock the inode since the new transaction doesn't | |
349 | * have the inode attached. | |
350 | */ | |
1c72bf90 | 351 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
352 | tp = ntp; |
353 | if (error) { | |
354 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
355 | goto error0; | |
356 | } | |
cc09c0dc DC |
357 | /* |
358 | * transaction commit worked ok so we can drop the extra ticket | |
359 | * reference that we gained in xfs_trans_dup() | |
360 | */ | |
361 | xfs_log_ticket_put(tp->t_ticket); | |
362 | ||
1da177e4 LT |
363 | /* |
364 | * Remove the memory for extent descriptions (just bookkeeping). | |
365 | */ | |
366 | if (ip->i_df.if_bytes) | |
367 | xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK); | |
368 | ASSERT(ip->i_df.if_bytes == 0); | |
369 | /* | |
370 | * Put an itruncate log reservation in the new transaction | |
371 | * for our caller. | |
372 | */ | |
373 | if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, | |
374 | XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) { | |
375 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
376 | goto error0; | |
377 | } | |
378 | /* | |
379 | * Return with the inode locked but not joined to the transaction. | |
380 | */ | |
381 | *tpp = tp; | |
382 | return 0; | |
383 | ||
384 | error1: | |
385 | xfs_bmap_cancel(&free_list); | |
386 | error0: | |
387 | /* | |
388 | * Have to come here with the inode locked and either | |
389 | * (held and in the transaction) or (not in the transaction). | |
390 | * If the inode isn't held then cancel would iput it, but | |
391 | * that's wrong since this is inactive and the vnode ref | |
392 | * count is 0 already. | |
393 | * Cancel won't do anything to the inode if held, but it still | |
394 | * needs to be locked until the cancel is done, if it was | |
395 | * joined to the transaction. | |
396 | */ | |
397 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
398 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
399 | *tpp = NULL; | |
400 | return error; | |
401 | ||
402 | } | |
403 | ||
404 | STATIC int | |
405 | xfs_inactive_symlink_local( | |
406 | xfs_inode_t *ip, | |
407 | xfs_trans_t **tpp) | |
408 | { | |
409 | int error; | |
410 | ||
411 | ASSERT(ip->i_d.di_size <= XFS_IFORK_DSIZE(ip)); | |
412 | /* | |
413 | * We're freeing a symlink which fit into | |
414 | * the inode. Just free the memory used | |
415 | * to hold the old symlink. | |
416 | */ | |
417 | error = xfs_trans_reserve(*tpp, 0, | |
418 | XFS_ITRUNCATE_LOG_RES(ip->i_mount), | |
419 | 0, XFS_TRANS_PERM_LOG_RES, | |
420 | XFS_ITRUNCATE_LOG_COUNT); | |
421 | ||
422 | if (error) { | |
423 | xfs_trans_cancel(*tpp, 0); | |
424 | *tpp = NULL; | |
014c2544 | 425 | return error; |
1da177e4 LT |
426 | } |
427 | xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
428 | ||
429 | /* | |
430 | * Zero length symlinks _can_ exist. | |
431 | */ | |
432 | if (ip->i_df.if_bytes > 0) { | |
433 | xfs_idata_realloc(ip, | |
434 | -(ip->i_df.if_bytes), | |
435 | XFS_DATA_FORK); | |
436 | ASSERT(ip->i_df.if_bytes == 0); | |
437 | } | |
014c2544 | 438 | return 0; |
1da177e4 LT |
439 | } |
440 | ||
1da177e4 LT |
441 | STATIC int |
442 | xfs_inactive_attrs( | |
443 | xfs_inode_t *ip, | |
444 | xfs_trans_t **tpp) | |
445 | { | |
446 | xfs_trans_t *tp; | |
447 | int error; | |
448 | xfs_mount_t *mp; | |
449 | ||
579aa9ca | 450 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
1da177e4 LT |
451 | tp = *tpp; |
452 | mp = ip->i_mount; | |
453 | ASSERT(ip->i_d.di_forkoff != 0); | |
e5720eec | 454 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 | 455 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
e5720eec DC |
456 | if (error) |
457 | goto error_unlock; | |
1da177e4 LT |
458 | |
459 | error = xfs_attr_inactive(ip); | |
e5720eec DC |
460 | if (error) |
461 | goto error_unlock; | |
1da177e4 LT |
462 | |
463 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
464 | error = xfs_trans_reserve(tp, 0, | |
465 | XFS_IFREE_LOG_RES(mp), | |
466 | 0, XFS_TRANS_PERM_LOG_RES, | |
467 | XFS_INACTIVE_LOG_COUNT); | |
e5720eec DC |
468 | if (error) |
469 | goto error_cancel; | |
1da177e4 LT |
470 | |
471 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
898621d5 | 472 | xfs_trans_ijoin(tp, ip); |
1da177e4 LT |
473 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); |
474 | ||
475 | ASSERT(ip->i_d.di_anextents == 0); | |
476 | ||
477 | *tpp = tp; | |
014c2544 | 478 | return 0; |
e5720eec DC |
479 | |
480 | error_cancel: | |
481 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
482 | xfs_trans_cancel(tp, 0); | |
483 | error_unlock: | |
484 | *tpp = NULL; | |
485 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
486 | return error; | |
1da177e4 LT |
487 | } |
488 | ||
993386c1 | 489 | int |
1da177e4 | 490 | xfs_release( |
993386c1 | 491 | xfs_inode_t *ip) |
1da177e4 | 492 | { |
993386c1 | 493 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 LT |
494 | int error; |
495 | ||
42173f68 | 496 | if (!S_ISREG(ip->i_d.di_mode) || (ip->i_d.di_mode == 0)) |
1da177e4 | 497 | return 0; |
1da177e4 LT |
498 | |
499 | /* If this is a read-only mount, don't do this (would generate I/O) */ | |
bd186aa9 | 500 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
1da177e4 LT |
501 | return 0; |
502 | ||
2a82b8be | 503 | if (!XFS_FORCED_SHUTDOWN(mp)) { |
b3aea4ed CH |
504 | int truncated; |
505 | ||
2a82b8be DC |
506 | /* |
507 | * If we are using filestreams, and we have an unlinked | |
508 | * file that we are processing the last close on, then nothing | |
509 | * will be able to reopen and write to this file. Purge this | |
510 | * inode from the filestreams cache so that it doesn't delay | |
511 | * teardown of the inode. | |
512 | */ | |
513 | if ((ip->i_d.di_nlink == 0) && xfs_inode_is_filestream(ip)) | |
514 | xfs_filestream_deassociate(ip); | |
515 | ||
fbf3ce8d CH |
516 | /* |
517 | * If we previously truncated this file and removed old data | |
518 | * in the process, we want to initiate "early" writeout on | |
519 | * the last close. This is an attempt to combat the notorious | |
25985edc | 520 | * NULL files problem which is particularly noticeable from a |
fbf3ce8d CH |
521 | * truncate down, buffered (re-)write (delalloc), followed by |
522 | * a crash. What we are effectively doing here is | |
523 | * significantly reducing the time window where we'd otherwise | |
524 | * be exposed to that problem. | |
525 | */ | |
09262b43 | 526 | truncated = xfs_iflags_test_and_clear(ip, XFS_ITRUNCATED); |
df4368a1 DC |
527 | if (truncated) { |
528 | xfs_iflags_clear(ip, XFS_IDIRTY_RELEASE); | |
529 | if (VN_DIRTY(VFS_I(ip)) && ip->i_delayed_blks > 0) | |
530 | xfs_flush_pages(ip, 0, -1, XBF_ASYNC, FI_NONE); | |
531 | } | |
fbf3ce8d CH |
532 | } |
533 | ||
6e857567 DC |
534 | if (ip->i_d.di_nlink == 0) |
535 | return 0; | |
c56c9631 | 536 | |
abbede1b | 537 | if ((S_ISREG(ip->i_d.di_mode) && |
6e857567 DC |
538 | ((ip->i_size > 0) || (VN_CACHED(VFS_I(ip)) > 0 || |
539 | ip->i_delayed_blks > 0)) && | |
540 | (ip->i_df.if_flags & XFS_IFEXTENTS)) && | |
541 | (!(ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)))) { | |
542 | ||
543 | /* | |
544 | * If we can't get the iolock just skip truncating the blocks | |
545 | * past EOF because we could deadlock with the mmap_sem | |
546 | * otherwise. We'll get another chance to drop them once the | |
547 | * last reference to the inode is dropped, so we'll never leak | |
548 | * blocks permanently. | |
549 | * | |
550 | * Further, check if the inode is being opened, written and | |
551 | * closed frequently and we have delayed allocation blocks | |
25985edc | 552 | * outstanding (e.g. streaming writes from the NFS server), |
6e857567 DC |
553 | * truncating the blocks past EOF will cause fragmentation to |
554 | * occur. | |
555 | * | |
556 | * In this case don't do the truncation, either, but we have to | |
557 | * be careful how we detect this case. Blocks beyond EOF show | |
558 | * up as i_delayed_blks even when the inode is clean, so we | |
559 | * need to truncate them away first before checking for a dirty | |
560 | * release. Hence on the first dirty close we will still remove | |
561 | * the speculative allocation, but after that we will leave it | |
562 | * in place. | |
563 | */ | |
564 | if (xfs_iflags_test(ip, XFS_IDIRTY_RELEASE)) | |
565 | return 0; | |
1da177e4 | 566 | |
6e857567 DC |
567 | error = xfs_free_eofblocks(mp, ip, |
568 | XFS_FREE_EOF_TRYLOCK); | |
569 | if (error) | |
570 | return error; | |
571 | ||
572 | /* delalloc blocks after truncation means it really is dirty */ | |
573 | if (ip->i_delayed_blks) | |
574 | xfs_iflags_set(ip, XFS_IDIRTY_RELEASE); | |
575 | } | |
1da177e4 LT |
576 | return 0; |
577 | } | |
578 | ||
579 | /* | |
580 | * xfs_inactive | |
581 | * | |
582 | * This is called when the vnode reference count for the vnode | |
583 | * goes to zero. If the file has been unlinked, then it must | |
584 | * now be truncated. Also, we clear all of the read-ahead state | |
585 | * kept for the inode here since the file is now closed. | |
586 | */ | |
993386c1 | 587 | int |
1da177e4 | 588 | xfs_inactive( |
993386c1 | 589 | xfs_inode_t *ip) |
1da177e4 | 590 | { |
67fcaa73 | 591 | xfs_bmap_free_t free_list; |
1da177e4 LT |
592 | xfs_fsblock_t first_block; |
593 | int committed; | |
594 | xfs_trans_t *tp; | |
595 | xfs_mount_t *mp; | |
596 | int error; | |
597 | int truncate; | |
598 | ||
1da177e4 LT |
599 | /* |
600 | * If the inode is already free, then there can be nothing | |
601 | * to clean up here. | |
602 | */ | |
cb4c8cc1 | 603 | if (ip->i_d.di_mode == 0 || is_bad_inode(VFS_I(ip))) { |
1da177e4 LT |
604 | ASSERT(ip->i_df.if_real_bytes == 0); |
605 | ASSERT(ip->i_df.if_broot_bytes == 0); | |
606 | return VN_INACTIVE_CACHE; | |
607 | } | |
608 | ||
609 | /* | |
610 | * Only do a truncate if it's a regular file with | |
611 | * some actual space in it. It's OK to look at the | |
612 | * inode's fields without the lock because we're the | |
613 | * only one with a reference to the inode. | |
614 | */ | |
615 | truncate = ((ip->i_d.di_nlink == 0) && | |
ba87ea69 LM |
616 | ((ip->i_d.di_size != 0) || (ip->i_size != 0) || |
617 | (ip->i_d.di_nextents > 0) || (ip->i_delayed_blks > 0)) && | |
abbede1b | 618 | S_ISREG(ip->i_d.di_mode)); |
1da177e4 LT |
619 | |
620 | mp = ip->i_mount; | |
621 | ||
1da177e4 LT |
622 | error = 0; |
623 | ||
624 | /* If this is a read-only mount, don't do this (would generate I/O) */ | |
bd186aa9 | 625 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
1da177e4 LT |
626 | goto out; |
627 | ||
628 | if (ip->i_d.di_nlink != 0) { | |
abbede1b | 629 | if ((S_ISREG(ip->i_d.di_mode) && |
df80c933 | 630 | ((ip->i_size > 0) || (VN_CACHED(VFS_I(ip)) > 0 || |
68bdb6ea | 631 | ip->i_delayed_blks > 0)) && |
dd9f438e NS |
632 | (ip->i_df.if_flags & XFS_IFEXTENTS) && |
633 | (!(ip->i_d.di_flags & | |
634 | (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)) || | |
635 | (ip->i_delayed_blks != 0)))) { | |
c56c9631 | 636 | error = xfs_free_eofblocks(mp, ip, 0); |
92dfe8d2 | 637 | if (error) |
014c2544 | 638 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
639 | } |
640 | goto out; | |
641 | } | |
642 | ||
643 | ASSERT(ip->i_d.di_nlink == 0); | |
644 | ||
7d095257 CH |
645 | error = xfs_qm_dqattach(ip, 0); |
646 | if (error) | |
014c2544 | 647 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
648 | |
649 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
650 | if (truncate) { | |
1da177e4 LT |
651 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
652 | ||
1da177e4 LT |
653 | error = xfs_trans_reserve(tp, 0, |
654 | XFS_ITRUNCATE_LOG_RES(mp), | |
655 | 0, XFS_TRANS_PERM_LOG_RES, | |
656 | XFS_ITRUNCATE_LOG_COUNT); | |
657 | if (error) { | |
658 | /* Don't call itruncate_cleanup */ | |
659 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
660 | xfs_trans_cancel(tp, 0); | |
661 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
014c2544 | 662 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
663 | } |
664 | ||
665 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
898621d5 | 666 | xfs_trans_ijoin(tp, ip); |
1da177e4 | 667 | |
8f04c47a | 668 | error = xfs_itruncate_data(&tp, ip, 0); |
1da177e4 LT |
669 | if (error) { |
670 | xfs_trans_cancel(tp, | |
671 | XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
672 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
014c2544 | 673 | return VN_INACTIVE_CACHE; |
1da177e4 | 674 | } |
abbede1b | 675 | } else if (S_ISLNK(ip->i_d.di_mode)) { |
1da177e4 LT |
676 | |
677 | /* | |
678 | * If we get an error while cleaning up a | |
679 | * symlink we bail out. | |
680 | */ | |
681 | error = (ip->i_d.di_size > XFS_IFORK_DSIZE(ip)) ? | |
682 | xfs_inactive_symlink_rmt(ip, &tp) : | |
683 | xfs_inactive_symlink_local(ip, &tp); | |
684 | ||
685 | if (error) { | |
686 | ASSERT(tp == NULL); | |
014c2544 | 687 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
688 | } |
689 | ||
898621d5 | 690 | xfs_trans_ijoin(tp, ip); |
1da177e4 LT |
691 | } else { |
692 | error = xfs_trans_reserve(tp, 0, | |
693 | XFS_IFREE_LOG_RES(mp), | |
694 | 0, XFS_TRANS_PERM_LOG_RES, | |
695 | XFS_INACTIVE_LOG_COUNT); | |
696 | if (error) { | |
697 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
698 | xfs_trans_cancel(tp, 0); | |
014c2544 | 699 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
700 | } |
701 | ||
702 | xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
898621d5 | 703 | xfs_trans_ijoin(tp, ip); |
1da177e4 LT |
704 | } |
705 | ||
706 | /* | |
707 | * If there are attributes associated with the file | |
708 | * then blow them away now. The code calls a routine | |
709 | * that recursively deconstructs the attribute fork. | |
710 | * We need to just commit the current transaction | |
711 | * because we can't use it for xfs_attr_inactive(). | |
712 | */ | |
713 | if (ip->i_d.di_anextents > 0) { | |
714 | error = xfs_inactive_attrs(ip, &tp); | |
715 | /* | |
716 | * If we got an error, the transaction is already | |
717 | * cancelled, and the inode is unlocked. Just get out. | |
718 | */ | |
719 | if (error) | |
014c2544 | 720 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
721 | } else if (ip->i_afp) { |
722 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); | |
723 | } | |
724 | ||
725 | /* | |
726 | * Free the inode. | |
727 | */ | |
9d87c319 | 728 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 LT |
729 | error = xfs_ifree(tp, ip, &free_list); |
730 | if (error) { | |
731 | /* | |
732 | * If we fail to free the inode, shut down. The cancel | |
733 | * might do that, we need to make sure. Otherwise the | |
734 | * inode might be lost for a long time or forever. | |
735 | */ | |
736 | if (!XFS_FORCED_SHUTDOWN(mp)) { | |
0b932ccc DC |
737 | xfs_notice(mp, "%s: xfs_ifree returned error %d", |
738 | __func__, error); | |
7d04a335 | 739 | xfs_force_shutdown(mp, SHUTDOWN_META_IO_ERROR); |
1da177e4 LT |
740 | } |
741 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); | |
742 | } else { | |
743 | /* | |
744 | * Credit the quota account(s). The inode is gone. | |
745 | */ | |
7d095257 | 746 | xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_ICOUNT, -1); |
1da177e4 LT |
747 | |
748 | /* | |
78e9da77 DC |
749 | * Just ignore errors at this point. There is nothing we can |
750 | * do except to try to keep going. Make sure it's not a silent | |
751 | * error. | |
1da177e4 | 752 | */ |
78e9da77 DC |
753 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
754 | if (error) | |
53487786 DC |
755 | xfs_notice(mp, "%s: xfs_bmap_finish returned error %d", |
756 | __func__, error); | |
78e9da77 DC |
757 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
758 | if (error) | |
53487786 DC |
759 | xfs_notice(mp, "%s: xfs_trans_commit returned error %d", |
760 | __func__, error); | |
1da177e4 | 761 | } |
7d095257 | 762 | |
1da177e4 LT |
763 | /* |
764 | * Release the dquots held by inode, if any. | |
765 | */ | |
7d095257 | 766 | xfs_qm_dqdetach(ip); |
1da177e4 LT |
767 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
768 | ||
769 | out: | |
770 | return VN_INACTIVE_CACHE; | |
771 | } | |
772 | ||
384f3ced BN |
773 | /* |
774 | * Lookups up an inode from "name". If ci_name is not NULL, then a CI match | |
775 | * is allowed, otherwise it has to be an exact match. If a CI match is found, | |
776 | * ci_name->name will point to a the actual name (caller must free) or | |
777 | * will be set to NULL if an exact match is found. | |
778 | */ | |
993386c1 | 779 | int |
1da177e4 | 780 | xfs_lookup( |
993386c1 | 781 | xfs_inode_t *dp, |
556b8b16 | 782 | struct xfs_name *name, |
384f3ced BN |
783 | xfs_inode_t **ipp, |
784 | struct xfs_name *ci_name) | |
1da177e4 | 785 | { |
eca450b7 | 786 | xfs_ino_t inum; |
1da177e4 LT |
787 | int error; |
788 | uint lock_mode; | |
1da177e4 | 789 | |
cca28fb8 | 790 | trace_xfs_lookup(dp, name); |
1da177e4 LT |
791 | |
792 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) | |
793 | return XFS_ERROR(EIO); | |
794 | ||
795 | lock_mode = xfs_ilock_map_shared(dp); | |
384f3ced | 796 | error = xfs_dir_lookup(NULL, dp, name, &inum, ci_name); |
1da177e4 | 797 | xfs_iunlock_map_shared(dp, lock_mode); |
eca450b7 CH |
798 | |
799 | if (error) | |
800 | goto out; | |
801 | ||
7b6259e7 | 802 | error = xfs_iget(dp->i_mount, NULL, inum, 0, 0, ipp); |
eca450b7 | 803 | if (error) |
384f3ced | 804 | goto out_free_name; |
eca450b7 | 805 | |
eca450b7 CH |
806 | return 0; |
807 | ||
384f3ced BN |
808 | out_free_name: |
809 | if (ci_name) | |
810 | kmem_free(ci_name->name); | |
811 | out: | |
eca450b7 | 812 | *ipp = NULL; |
1da177e4 LT |
813 | return error; |
814 | } | |
815 | ||
993386c1 | 816 | int |
1da177e4 | 817 | xfs_create( |
993386c1 | 818 | xfs_inode_t *dp, |
556b8b16 | 819 | struct xfs_name *name, |
3e5daf05 CH |
820 | mode_t mode, |
821 | xfs_dev_t rdev, | |
6c77b0ea | 822 | xfs_inode_t **ipp) |
1da177e4 | 823 | { |
517b5e8c CH |
824 | int is_dir = S_ISDIR(mode); |
825 | struct xfs_mount *mp = dp->i_mount; | |
826 | struct xfs_inode *ip = NULL; | |
827 | struct xfs_trans *tp = NULL; | |
556b8b16 | 828 | int error; |
1da177e4 LT |
829 | xfs_bmap_free_t free_list; |
830 | xfs_fsblock_t first_block; | |
993386c1 | 831 | boolean_t unlock_dp_on_error = B_FALSE; |
1da177e4 LT |
832 | uint cancel_flags; |
833 | int committed; | |
6743099c | 834 | prid_t prid; |
517b5e8c CH |
835 | struct xfs_dquot *udqp = NULL; |
836 | struct xfs_dquot *gdqp = NULL; | |
1da177e4 | 837 | uint resblks; |
517b5e8c CH |
838 | uint log_res; |
839 | uint log_count; | |
1da177e4 | 840 | |
cca28fb8 | 841 | trace_xfs_create(dp, name); |
1da177e4 | 842 | |
517b5e8c CH |
843 | if (XFS_FORCED_SHUTDOWN(mp)) |
844 | return XFS_ERROR(EIO); | |
845 | ||
365ca83d | 846 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
6743099c | 847 | prid = xfs_get_projid(dp); |
1da177e4 | 848 | else |
6743099c | 849 | prid = XFS_PROJID_DEFAULT; |
1da177e4 LT |
850 | |
851 | /* | |
852 | * Make sure that we have allocated dquot(s) on disk. | |
853 | */ | |
7d095257 | 854 | error = xfs_qm_vop_dqalloc(dp, current_fsuid(), current_fsgid(), prid, |
517b5e8c | 855 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
1da177e4 | 856 | if (error) |
ec3ba85f | 857 | return error; |
1da177e4 | 858 | |
517b5e8c CH |
859 | if (is_dir) { |
860 | rdev = 0; | |
861 | resblks = XFS_MKDIR_SPACE_RES(mp, name->len); | |
862 | log_res = XFS_MKDIR_LOG_RES(mp); | |
863 | log_count = XFS_MKDIR_LOG_COUNT; | |
864 | tp = xfs_trans_alloc(mp, XFS_TRANS_MKDIR); | |
865 | } else { | |
866 | resblks = XFS_CREATE_SPACE_RES(mp, name->len); | |
867 | log_res = XFS_CREATE_LOG_RES(mp); | |
868 | log_count = XFS_CREATE_LOG_COUNT; | |
869 | tp = xfs_trans_alloc(mp, XFS_TRANS_CREATE); | |
870 | } | |
1da177e4 | 871 | |
1da177e4 | 872 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
517b5e8c | 873 | |
1da177e4 LT |
874 | /* |
875 | * Initially assume that the file does not exist and | |
876 | * reserve the resources for that case. If that is not | |
877 | * the case we'll drop the one we have and get a more | |
878 | * appropriate transaction later. | |
879 | */ | |
517b5e8c CH |
880 | error = xfs_trans_reserve(tp, resblks, log_res, 0, |
881 | XFS_TRANS_PERM_LOG_RES, log_count); | |
1da177e4 | 882 | if (error == ENOSPC) { |
153fec43 DC |
883 | /* flush outstanding delalloc blocks and retry */ |
884 | xfs_flush_inodes(dp); | |
4734d401 CH |
885 | error = xfs_trans_reserve(tp, resblks, log_res, 0, |
886 | XFS_TRANS_PERM_LOG_RES, log_count); | |
153fec43 DC |
887 | } |
888 | if (error == ENOSPC) { | |
889 | /* No space at all so try a "no-allocation" reservation */ | |
1da177e4 | 890 | resblks = 0; |
517b5e8c CH |
891 | error = xfs_trans_reserve(tp, 0, log_res, 0, |
892 | XFS_TRANS_PERM_LOG_RES, log_count); | |
1da177e4 LT |
893 | } |
894 | if (error) { | |
895 | cancel_flags = 0; | |
517b5e8c | 896 | goto out_trans_cancel; |
1da177e4 LT |
897 | } |
898 | ||
f7c66ce3 | 899 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
993386c1 | 900 | unlock_dp_on_error = B_TRUE; |
1da177e4 | 901 | |
517b5e8c CH |
902 | /* |
903 | * Check for directory link count overflow. | |
904 | */ | |
905 | if (is_dir && dp->i_d.di_nlink >= XFS_MAXLINK) { | |
906 | error = XFS_ERROR(EMLINK); | |
907 | goto out_trans_cancel; | |
908 | } | |
1da177e4 | 909 | |
517b5e8c | 910 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 LT |
911 | |
912 | /* | |
913 | * Reserve disk quota and the inode. | |
914 | */ | |
7d095257 | 915 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, resblks, 1, 0); |
1da177e4 | 916 | if (error) |
517b5e8c | 917 | goto out_trans_cancel; |
1da177e4 | 918 | |
556b8b16 BN |
919 | error = xfs_dir_canenter(tp, dp, name, resblks); |
920 | if (error) | |
517b5e8c CH |
921 | goto out_trans_cancel; |
922 | ||
923 | /* | |
924 | * A newly created regular or special file just has one directory | |
925 | * entry pointing to them, but a directory also the "." entry | |
926 | * pointing to itself. | |
927 | */ | |
6c77b0ea | 928 | error = xfs_dir_ialloc(&tp, dp, mode, is_dir ? 2 : 1, rdev, |
517b5e8c | 929 | prid, resblks > 0, &ip, &committed); |
1da177e4 LT |
930 | if (error) { |
931 | if (error == ENOSPC) | |
517b5e8c CH |
932 | goto out_trans_cancel; |
933 | goto out_trans_abort; | |
1da177e4 | 934 | } |
1da177e4 | 935 | |
1da177e4 | 936 | /* |
993386c1 CH |
937 | * Now we join the directory inode to the transaction. We do not do it |
938 | * earlier because xfs_dir_ialloc might commit the previous transaction | |
939 | * (and release all the locks). An error from here on will result in | |
940 | * the transaction cancel unlocking dp so don't do it explicitly in the | |
941 | * error path. | |
1da177e4 | 942 | */ |
898621d5 | 943 | xfs_trans_ijoin_ref(tp, dp, XFS_ILOCK_EXCL); |
993386c1 | 944 | unlock_dp_on_error = B_FALSE; |
1da177e4 | 945 | |
556b8b16 | 946 | error = xfs_dir_createname(tp, dp, name, ip->i_ino, |
f6c2d1fa NS |
947 | &first_block, &free_list, resblks ? |
948 | resblks - XFS_IALLOC_SPACE_RES(mp) : 0); | |
1da177e4 LT |
949 | if (error) { |
950 | ASSERT(error != ENOSPC); | |
517b5e8c | 951 | goto out_trans_abort; |
1da177e4 | 952 | } |
dcd79a14 | 953 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1da177e4 LT |
954 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); |
955 | ||
517b5e8c CH |
956 | if (is_dir) { |
957 | error = xfs_dir_init(tp, ip, dp); | |
958 | if (error) | |
959 | goto out_bmap_cancel; | |
960 | ||
961 | error = xfs_bumplink(tp, dp); | |
962 | if (error) | |
963 | goto out_bmap_cancel; | |
964 | } | |
965 | ||
1da177e4 LT |
966 | /* |
967 | * If this is a synchronous mount, make sure that the | |
968 | * create transaction goes to disk before returning to | |
969 | * the user. | |
970 | */ | |
517b5e8c | 971 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) |
1da177e4 | 972 | xfs_trans_set_sync(tp); |
1da177e4 | 973 | |
1da177e4 LT |
974 | /* |
975 | * Attach the dquot(s) to the inodes and modify them incore. | |
976 | * These ids of the inode couldn't have changed since the new | |
977 | * inode has been locked ever since it was created. | |
978 | */ | |
7d095257 | 979 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp); |
1da177e4 | 980 | |
f7c99b6f | 981 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
517b5e8c | 982 | if (error) |
ec3ba85f | 983 | goto out_bmap_cancel; |
1da177e4 | 984 | |
1c72bf90 | 985 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
ec3ba85f CH |
986 | if (error) |
987 | goto out_release_inode; | |
1da177e4 | 988 | |
7d095257 CH |
989 | xfs_qm_dqrele(udqp); |
990 | xfs_qm_dqrele(gdqp); | |
1da177e4 | 991 | |
979ebab1 | 992 | *ipp = ip; |
288699fe | 993 | return 0; |
1da177e4 | 994 | |
517b5e8c CH |
995 | out_bmap_cancel: |
996 | xfs_bmap_cancel(&free_list); | |
997 | out_trans_abort: | |
1da177e4 | 998 | cancel_flags |= XFS_TRANS_ABORT; |
517b5e8c CH |
999 | out_trans_cancel: |
1000 | xfs_trans_cancel(tp, cancel_flags); | |
ec3ba85f CH |
1001 | out_release_inode: |
1002 | /* | |
1003 | * Wait until after the current transaction is aborted to | |
1004 | * release the inode. This prevents recursive transactions | |
1005 | * and deadlocks from xfs_inactive. | |
1006 | */ | |
1007 | if (ip) | |
1008 | IRELE(ip); | |
1009 | ||
7d095257 CH |
1010 | xfs_qm_dqrele(udqp); |
1011 | xfs_qm_dqrele(gdqp); | |
1da177e4 | 1012 | |
993386c1 CH |
1013 | if (unlock_dp_on_error) |
1014 | xfs_iunlock(dp, XFS_ILOCK_EXCL); | |
288699fe | 1015 | return error; |
1da177e4 LT |
1016 | } |
1017 | ||
1da177e4 LT |
1018 | #ifdef DEBUG |
1019 | int xfs_locked_n; | |
1020 | int xfs_small_retries; | |
1021 | int xfs_middle_retries; | |
1022 | int xfs_lots_retries; | |
1023 | int xfs_lock_delays; | |
1024 | #endif | |
1025 | ||
f7c66ce3 LM |
1026 | /* |
1027 | * Bump the subclass so xfs_lock_inodes() acquires each lock with | |
1028 | * a different value | |
1029 | */ | |
1030 | static inline int | |
1031 | xfs_lock_inumorder(int lock_mode, int subclass) | |
1032 | { | |
1033 | if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) | |
0f1145cc | 1034 | lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_IOLOCK_SHIFT; |
f7c66ce3 | 1035 | if (lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) |
0f1145cc | 1036 | lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_ILOCK_SHIFT; |
f7c66ce3 LM |
1037 | |
1038 | return lock_mode; | |
1039 | } | |
1040 | ||
1da177e4 LT |
1041 | /* |
1042 | * The following routine will lock n inodes in exclusive mode. | |
1043 | * We assume the caller calls us with the inodes in i_ino order. | |
1044 | * | |
1045 | * We need to detect deadlock where an inode that we lock | |
1046 | * is in the AIL and we start waiting for another inode that is locked | |
1047 | * by a thread in a long running transaction (such as truncate). This can | |
1048 | * result in deadlock since the long running trans might need to wait | |
1049 | * for the inode we just locked in order to push the tail and free space | |
1050 | * in the log. | |
1051 | */ | |
1052 | void | |
1053 | xfs_lock_inodes( | |
1054 | xfs_inode_t **ips, | |
1055 | int inodes, | |
1da177e4 LT |
1056 | uint lock_mode) |
1057 | { | |
1058 | int attempts = 0, i, j, try_lock; | |
1059 | xfs_log_item_t *lp; | |
1060 | ||
1061 | ASSERT(ips && (inodes >= 2)); /* we need at least two */ | |
1062 | ||
cfa853e4 CH |
1063 | try_lock = 0; |
1064 | i = 0; | |
1da177e4 LT |
1065 | |
1066 | again: | |
1067 | for (; i < inodes; i++) { | |
1068 | ASSERT(ips[i]); | |
1069 | ||
1070 | if (i && (ips[i] == ips[i-1])) /* Already locked */ | |
1071 | continue; | |
1072 | ||
1073 | /* | |
1074 | * If try_lock is not set yet, make sure all locked inodes | |
1075 | * are not in the AIL. | |
1076 | * If any are, set try_lock to be used later. | |
1077 | */ | |
1078 | ||
1079 | if (!try_lock) { | |
1080 | for (j = (i - 1); j >= 0 && !try_lock; j--) { | |
1081 | lp = (xfs_log_item_t *)ips[j]->i_itemp; | |
1082 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { | |
1083 | try_lock++; | |
1084 | } | |
1085 | } | |
1086 | } | |
1087 | ||
1088 | /* | |
1089 | * If any of the previous locks we have locked is in the AIL, | |
1090 | * we must TRY to get the second and subsequent locks. If | |
1091 | * we can't get any, we must release all we have | |
1092 | * and try again. | |
1093 | */ | |
1094 | ||
1095 | if (try_lock) { | |
1096 | /* try_lock must be 0 if i is 0. */ | |
1097 | /* | |
1098 | * try_lock means we have an inode locked | |
1099 | * that is in the AIL. | |
1100 | */ | |
1101 | ASSERT(i != 0); | |
f7c66ce3 | 1102 | if (!xfs_ilock_nowait(ips[i], xfs_lock_inumorder(lock_mode, i))) { |
1da177e4 LT |
1103 | attempts++; |
1104 | ||
1105 | /* | |
1106 | * Unlock all previous guys and try again. | |
1107 | * xfs_iunlock will try to push the tail | |
1108 | * if the inode is in the AIL. | |
1109 | */ | |
1110 | ||
1111 | for(j = i - 1; j >= 0; j--) { | |
1112 | ||
1113 | /* | |
1114 | * Check to see if we've already | |
1115 | * unlocked this one. | |
1116 | * Not the first one going back, | |
1117 | * and the inode ptr is the same. | |
1118 | */ | |
1119 | if ((j != (i - 1)) && ips[j] == | |
1120 | ips[j+1]) | |
1121 | continue; | |
1122 | ||
1123 | xfs_iunlock(ips[j], lock_mode); | |
1124 | } | |
1125 | ||
1126 | if ((attempts % 5) == 0) { | |
1127 | delay(1); /* Don't just spin the CPU */ | |
1128 | #ifdef DEBUG | |
1129 | xfs_lock_delays++; | |
1130 | #endif | |
1131 | } | |
1132 | i = 0; | |
1133 | try_lock = 0; | |
1134 | goto again; | |
1135 | } | |
1136 | } else { | |
f7c66ce3 | 1137 | xfs_ilock(ips[i], xfs_lock_inumorder(lock_mode, i)); |
1da177e4 LT |
1138 | } |
1139 | } | |
1140 | ||
1141 | #ifdef DEBUG | |
1142 | if (attempts) { | |
1143 | if (attempts < 5) xfs_small_retries++; | |
1144 | else if (attempts < 100) xfs_middle_retries++; | |
1145 | else xfs_lots_retries++; | |
1146 | } else { | |
1147 | xfs_locked_n++; | |
1148 | } | |
1149 | #endif | |
1150 | } | |
1151 | ||
f9114eba DC |
1152 | /* |
1153 | * xfs_lock_two_inodes() can only be used to lock one type of lock | |
1154 | * at a time - the iolock or the ilock, but not both at once. If | |
1155 | * we lock both at once, lockdep will report false positives saying | |
1156 | * we have violated locking orders. | |
1157 | */ | |
e1cccd91 CH |
1158 | void |
1159 | xfs_lock_two_inodes( | |
1160 | xfs_inode_t *ip0, | |
1161 | xfs_inode_t *ip1, | |
1162 | uint lock_mode) | |
1163 | { | |
1164 | xfs_inode_t *temp; | |
1165 | int attempts = 0; | |
1166 | xfs_log_item_t *lp; | |
1167 | ||
f9114eba DC |
1168 | if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) |
1169 | ASSERT((lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) == 0); | |
e1cccd91 CH |
1170 | ASSERT(ip0->i_ino != ip1->i_ino); |
1171 | ||
1172 | if (ip0->i_ino > ip1->i_ino) { | |
1173 | temp = ip0; | |
1174 | ip0 = ip1; | |
1175 | ip1 = temp; | |
1176 | } | |
1177 | ||
1178 | again: | |
1179 | xfs_ilock(ip0, xfs_lock_inumorder(lock_mode, 0)); | |
1180 | ||
1181 | /* | |
1182 | * If the first lock we have locked is in the AIL, we must TRY to get | |
1183 | * the second lock. If we can't get it, we must release the first one | |
1184 | * and try again. | |
1185 | */ | |
1186 | lp = (xfs_log_item_t *)ip0->i_itemp; | |
1187 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { | |
1188 | if (!xfs_ilock_nowait(ip1, xfs_lock_inumorder(lock_mode, 1))) { | |
1189 | xfs_iunlock(ip0, lock_mode); | |
1190 | if ((++attempts % 5) == 0) | |
1191 | delay(1); /* Don't just spin the CPU */ | |
1192 | goto again; | |
1193 | } | |
1194 | } else { | |
1195 | xfs_ilock(ip1, xfs_lock_inumorder(lock_mode, 1)); | |
1196 | } | |
1197 | } | |
1198 | ||
993386c1 | 1199 | int |
1da177e4 | 1200 | xfs_remove( |
993386c1 | 1201 | xfs_inode_t *dp, |
556b8b16 BN |
1202 | struct xfs_name *name, |
1203 | xfs_inode_t *ip) | |
1da177e4 | 1204 | { |
993386c1 | 1205 | xfs_mount_t *mp = dp->i_mount; |
1da177e4 | 1206 | xfs_trans_t *tp = NULL; |
8f112e3b | 1207 | int is_dir = S_ISDIR(ip->i_d.di_mode); |
1da177e4 LT |
1208 | int error = 0; |
1209 | xfs_bmap_free_t free_list; | |
1210 | xfs_fsblock_t first_block; | |
1211 | int cancel_flags; | |
1212 | int committed; | |
1da177e4 LT |
1213 | int link_zero; |
1214 | uint resblks; | |
8f112e3b | 1215 | uint log_count; |
1da177e4 | 1216 | |
cca28fb8 | 1217 | trace_xfs_remove(dp, name); |
1da177e4 | 1218 | |
1da177e4 LT |
1219 | if (XFS_FORCED_SHUTDOWN(mp)) |
1220 | return XFS_ERROR(EIO); | |
1221 | ||
7d095257 | 1222 | error = xfs_qm_dqattach(dp, 0); |
8f112e3b CH |
1223 | if (error) |
1224 | goto std_return; | |
1225 | ||
7d095257 | 1226 | error = xfs_qm_dqattach(ip, 0); |
8f112e3b | 1227 | if (error) |
1da177e4 | 1228 | goto std_return; |
1da177e4 | 1229 | |
8f112e3b CH |
1230 | if (is_dir) { |
1231 | tp = xfs_trans_alloc(mp, XFS_TRANS_RMDIR); | |
1232 | log_count = XFS_DEFAULT_LOG_COUNT; | |
1233 | } else { | |
1234 | tp = xfs_trans_alloc(mp, XFS_TRANS_REMOVE); | |
1235 | log_count = XFS_REMOVE_LOG_COUNT; | |
1236 | } | |
1da177e4 | 1237 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
8f112e3b | 1238 | |
1da177e4 LT |
1239 | /* |
1240 | * We try to get the real space reservation first, | |
1241 | * allowing for directory btree deletion(s) implying | |
1242 | * possible bmap insert(s). If we can't get the space | |
1243 | * reservation then we use 0 instead, and avoid the bmap | |
1244 | * btree insert(s) in the directory code by, if the bmap | |
1245 | * insert tries to happen, instead trimming the LAST | |
1246 | * block from the directory. | |
1247 | */ | |
1248 | resblks = XFS_REMOVE_SPACE_RES(mp); | |
1249 | error = xfs_trans_reserve(tp, resblks, XFS_REMOVE_LOG_RES(mp), 0, | |
8f112e3b | 1250 | XFS_TRANS_PERM_LOG_RES, log_count); |
1da177e4 LT |
1251 | if (error == ENOSPC) { |
1252 | resblks = 0; | |
1253 | error = xfs_trans_reserve(tp, 0, XFS_REMOVE_LOG_RES(mp), 0, | |
8f112e3b | 1254 | XFS_TRANS_PERM_LOG_RES, log_count); |
1da177e4 LT |
1255 | } |
1256 | if (error) { | |
1257 | ASSERT(error != ENOSPC); | |
8f112e3b CH |
1258 | cancel_flags = 0; |
1259 | goto out_trans_cancel; | |
1da177e4 LT |
1260 | } |
1261 | ||
e1cccd91 | 1262 | xfs_lock_two_inodes(dp, ip, XFS_ILOCK_EXCL); |
1da177e4 | 1263 | |
898621d5 CH |
1264 | xfs_trans_ijoin_ref(tp, dp, XFS_ILOCK_EXCL); |
1265 | xfs_trans_ijoin_ref(tp, ip, XFS_ILOCK_EXCL); | |
1da177e4 | 1266 | |
8f112e3b CH |
1267 | /* |
1268 | * If we're removing a directory perform some additional validation. | |
1269 | */ | |
1270 | if (is_dir) { | |
1271 | ASSERT(ip->i_d.di_nlink >= 2); | |
1272 | if (ip->i_d.di_nlink != 2) { | |
1273 | error = XFS_ERROR(ENOTEMPTY); | |
1274 | goto out_trans_cancel; | |
1275 | } | |
1276 | if (!xfs_dir_isempty(ip)) { | |
1277 | error = XFS_ERROR(ENOTEMPTY); | |
1278 | goto out_trans_cancel; | |
1279 | } | |
1280 | } | |
1281 | ||
9d87c319 | 1282 | xfs_bmap_init(&free_list, &first_block); |
556b8b16 | 1283 | error = xfs_dir_removename(tp, dp, name, ip->i_ino, |
d4377d84 | 1284 | &first_block, &free_list, resblks); |
1da177e4 LT |
1285 | if (error) { |
1286 | ASSERT(error != ENOENT); | |
8f112e3b | 1287 | goto out_bmap_cancel; |
1da177e4 | 1288 | } |
dcd79a14 | 1289 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1da177e4 | 1290 | |
8f112e3b CH |
1291 | if (is_dir) { |
1292 | /* | |
1293 | * Drop the link from ip's "..". | |
1294 | */ | |
1295 | error = xfs_droplink(tp, dp); | |
1296 | if (error) | |
1297 | goto out_bmap_cancel; | |
1298 | ||
1299 | /* | |
2b7035fd | 1300 | * Drop the "." link from ip to self. |
8f112e3b CH |
1301 | */ |
1302 | error = xfs_droplink(tp, ip); | |
1303 | if (error) | |
1304 | goto out_bmap_cancel; | |
1305 | } else { | |
1306 | /* | |
1307 | * When removing a non-directory we need to log the parent | |
26c52951 DC |
1308 | * inode here. For a directory this is done implicitly |
1309 | * by the xfs_droplink call for the ".." entry. | |
8f112e3b CH |
1310 | */ |
1311 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
1da177e4 LT |
1312 | } |
1313 | ||
8f112e3b | 1314 | /* |
2b7035fd | 1315 | * Drop the link from dp to ip. |
8f112e3b CH |
1316 | */ |
1317 | error = xfs_droplink(tp, ip); | |
1318 | if (error) | |
1319 | goto out_bmap_cancel; | |
1320 | ||
1321 | /* | |
1322 | * Determine if this is the last link while | |
1da177e4 LT |
1323 | * we are in the transaction. |
1324 | */ | |
8f112e3b | 1325 | link_zero = (ip->i_d.di_nlink == 0); |
1da177e4 | 1326 | |
1da177e4 LT |
1327 | /* |
1328 | * If this is a synchronous mount, make sure that the | |
1329 | * remove transaction goes to disk before returning to | |
1330 | * the user. | |
1331 | */ | |
8f112e3b | 1332 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) |
1da177e4 | 1333 | xfs_trans_set_sync(tp); |
1da177e4 | 1334 | |
f7c99b6f | 1335 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
8f112e3b CH |
1336 | if (error) |
1337 | goto out_bmap_cancel; | |
1da177e4 | 1338 | |
1c72bf90 | 1339 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
5df78e73 | 1340 | if (error) |
1da177e4 | 1341 | goto std_return; |
1da177e4 | 1342 | |
2a82b8be DC |
1343 | /* |
1344 | * If we are using filestreams, kill the stream association. | |
1345 | * If the file is still open it may get a new one but that | |
1346 | * will get killed on last close in xfs_close() so we don't | |
1347 | * have to worry about that. | |
1348 | */ | |
8f112e3b | 1349 | if (!is_dir && link_zero && xfs_inode_is_filestream(ip)) |
2a82b8be DC |
1350 | xfs_filestream_deassociate(ip); |
1351 | ||
288699fe | 1352 | return 0; |
1da177e4 | 1353 | |
8f112e3b | 1354 | out_bmap_cancel: |
1da177e4 LT |
1355 | xfs_bmap_cancel(&free_list); |
1356 | cancel_flags |= XFS_TRANS_ABORT; | |
8f112e3b | 1357 | out_trans_cancel: |
1da177e4 | 1358 | xfs_trans_cancel(tp, cancel_flags); |
288699fe CH |
1359 | std_return: |
1360 | return error; | |
1da177e4 LT |
1361 | } |
1362 | ||
993386c1 | 1363 | int |
1da177e4 | 1364 | xfs_link( |
993386c1 | 1365 | xfs_inode_t *tdp, |
a3da7896 | 1366 | xfs_inode_t *sip, |
556b8b16 | 1367 | struct xfs_name *target_name) |
1da177e4 | 1368 | { |
993386c1 | 1369 | xfs_mount_t *mp = tdp->i_mount; |
1da177e4 | 1370 | xfs_trans_t *tp; |
1da177e4 LT |
1371 | int error; |
1372 | xfs_bmap_free_t free_list; | |
1373 | xfs_fsblock_t first_block; | |
1374 | int cancel_flags; | |
1375 | int committed; | |
1da177e4 | 1376 | int resblks; |
1da177e4 | 1377 | |
cca28fb8 | 1378 | trace_xfs_link(tdp, target_name); |
1da177e4 | 1379 | |
a3da7896 | 1380 | ASSERT(!S_ISDIR(sip->i_d.di_mode)); |
1da177e4 | 1381 | |
1da177e4 LT |
1382 | if (XFS_FORCED_SHUTDOWN(mp)) |
1383 | return XFS_ERROR(EIO); | |
1384 | ||
7d095257 | 1385 | error = xfs_qm_dqattach(sip, 0); |
cb3f35bb CH |
1386 | if (error) |
1387 | goto std_return; | |
1388 | ||
7d095257 | 1389 | error = xfs_qm_dqattach(tdp, 0); |
1da177e4 LT |
1390 | if (error) |
1391 | goto std_return; | |
1392 | ||
1393 | tp = xfs_trans_alloc(mp, XFS_TRANS_LINK); | |
1394 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
556b8b16 | 1395 | resblks = XFS_LINK_SPACE_RES(mp, target_name->len); |
1da177e4 LT |
1396 | error = xfs_trans_reserve(tp, resblks, XFS_LINK_LOG_RES(mp), 0, |
1397 | XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); | |
1398 | if (error == ENOSPC) { | |
1399 | resblks = 0; | |
1400 | error = xfs_trans_reserve(tp, 0, XFS_LINK_LOG_RES(mp), 0, | |
1401 | XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); | |
1402 | } | |
1403 | if (error) { | |
1404 | cancel_flags = 0; | |
1405 | goto error_return; | |
1406 | } | |
1407 | ||
e1cccd91 | 1408 | xfs_lock_two_inodes(sip, tdp, XFS_ILOCK_EXCL); |
1da177e4 | 1409 | |
898621d5 CH |
1410 | xfs_trans_ijoin_ref(tp, sip, XFS_ILOCK_EXCL); |
1411 | xfs_trans_ijoin_ref(tp, tdp, XFS_ILOCK_EXCL); | |
1da177e4 LT |
1412 | |
1413 | /* | |
1414 | * If the source has too many links, we can't make any more to it. | |
1415 | */ | |
1416 | if (sip->i_d.di_nlink >= XFS_MAXLINK) { | |
1417 | error = XFS_ERROR(EMLINK); | |
1418 | goto error_return; | |
1419 | } | |
1420 | ||
365ca83d NS |
1421 | /* |
1422 | * If we are using project inheritance, we only allow hard link | |
1423 | * creation in our tree when the project IDs are the same; else | |
1424 | * the tree quota mechanism could be circumvented. | |
1425 | */ | |
1426 | if (unlikely((tdp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && | |
6743099c | 1427 | (xfs_get_projid(tdp) != xfs_get_projid(sip)))) { |
b1ecdda9 | 1428 | error = XFS_ERROR(EXDEV); |
365ca83d NS |
1429 | goto error_return; |
1430 | } | |
1431 | ||
556b8b16 BN |
1432 | error = xfs_dir_canenter(tp, tdp, target_name, resblks); |
1433 | if (error) | |
1da177e4 LT |
1434 | goto error_return; |
1435 | ||
9d87c319 | 1436 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 | 1437 | |
556b8b16 BN |
1438 | error = xfs_dir_createname(tp, tdp, target_name, sip->i_ino, |
1439 | &first_block, &free_list, resblks); | |
1da177e4 LT |
1440 | if (error) |
1441 | goto abort_return; | |
dcd79a14 | 1442 | xfs_trans_ichgtime(tp, tdp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1da177e4 LT |
1443 | xfs_trans_log_inode(tp, tdp, XFS_ILOG_CORE); |
1444 | ||
1445 | error = xfs_bumplink(tp, sip); | |
b71d300c | 1446 | if (error) |
1da177e4 | 1447 | goto abort_return; |
1da177e4 LT |
1448 | |
1449 | /* | |
1450 | * If this is a synchronous mount, make sure that the | |
1451 | * link transaction goes to disk before returning to | |
1452 | * the user. | |
1453 | */ | |
1454 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
1455 | xfs_trans_set_sync(tp); | |
1456 | } | |
1457 | ||
f7c99b6f | 1458 | error = xfs_bmap_finish (&tp, &free_list, &committed); |
1da177e4 LT |
1459 | if (error) { |
1460 | xfs_bmap_cancel(&free_list); | |
1461 | goto abort_return; | |
1462 | } | |
1463 | ||
288699fe | 1464 | return xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
1465 | |
1466 | abort_return: | |
1467 | cancel_flags |= XFS_TRANS_ABORT; | |
1da177e4 LT |
1468 | error_return: |
1469 | xfs_trans_cancel(tp, cancel_flags); | |
288699fe CH |
1470 | std_return: |
1471 | return error; | |
1da177e4 | 1472 | } |
b71d300c | 1473 | |
993386c1 | 1474 | int |
1da177e4 | 1475 | xfs_symlink( |
993386c1 | 1476 | xfs_inode_t *dp, |
556b8b16 BN |
1477 | struct xfs_name *link_name, |
1478 | const char *target_path, | |
3e5daf05 | 1479 | mode_t mode, |
6c77b0ea | 1480 | xfs_inode_t **ipp) |
1da177e4 | 1481 | { |
993386c1 | 1482 | xfs_mount_t *mp = dp->i_mount; |
1da177e4 | 1483 | xfs_trans_t *tp; |
1da177e4 LT |
1484 | xfs_inode_t *ip; |
1485 | int error; | |
1486 | int pathlen; | |
1487 | xfs_bmap_free_t free_list; | |
1488 | xfs_fsblock_t first_block; | |
993386c1 | 1489 | boolean_t unlock_dp_on_error = B_FALSE; |
1da177e4 LT |
1490 | uint cancel_flags; |
1491 | int committed; | |
1492 | xfs_fileoff_t first_fsb; | |
1493 | xfs_filblks_t fs_blocks; | |
1494 | int nmaps; | |
1495 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; | |
1496 | xfs_daddr_t d; | |
556b8b16 | 1497 | const char *cur_chunk; |
1da177e4 LT |
1498 | int byte_cnt; |
1499 | int n; | |
1500 | xfs_buf_t *bp; | |
6743099c | 1501 | prid_t prid; |
1da177e4 LT |
1502 | struct xfs_dquot *udqp, *gdqp; |
1503 | uint resblks; | |
1da177e4 | 1504 | |
3937be5b | 1505 | *ipp = NULL; |
1da177e4 LT |
1506 | error = 0; |
1507 | ip = NULL; | |
1508 | tp = NULL; | |
1509 | ||
cca28fb8 | 1510 | trace_xfs_symlink(dp, link_name); |
1da177e4 LT |
1511 | |
1512 | if (XFS_FORCED_SHUTDOWN(mp)) | |
1513 | return XFS_ERROR(EIO); | |
1514 | ||
1da177e4 LT |
1515 | /* |
1516 | * Check component lengths of the target path name. | |
1517 | */ | |
1518 | pathlen = strlen(target_path); | |
1519 | if (pathlen >= MAXPATHLEN) /* total string too long */ | |
1520 | return XFS_ERROR(ENAMETOOLONG); | |
1da177e4 | 1521 | |
1da177e4 | 1522 | udqp = gdqp = NULL; |
365ca83d | 1523 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
6743099c | 1524 | prid = xfs_get_projid(dp); |
1da177e4 | 1525 | else |
6743099c | 1526 | prid = XFS_PROJID_DEFAULT; |
1da177e4 LT |
1527 | |
1528 | /* | |
1529 | * Make sure that we have allocated dquot(s) on disk. | |
1530 | */ | |
7d095257 | 1531 | error = xfs_qm_vop_dqalloc(dp, current_fsuid(), current_fsgid(), prid, |
1da177e4 LT |
1532 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
1533 | if (error) | |
1534 | goto std_return; | |
1535 | ||
1536 | tp = xfs_trans_alloc(mp, XFS_TRANS_SYMLINK); | |
1537 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
1538 | /* | |
1539 | * The symlink will fit into the inode data fork? | |
1540 | * There can't be any attributes so we get the whole variable part. | |
1541 | */ | |
1542 | if (pathlen <= XFS_LITINO(mp)) | |
1543 | fs_blocks = 0; | |
1544 | else | |
1545 | fs_blocks = XFS_B_TO_FSB(mp, pathlen); | |
556b8b16 | 1546 | resblks = XFS_SYMLINK_SPACE_RES(mp, link_name->len, fs_blocks); |
1da177e4 LT |
1547 | error = xfs_trans_reserve(tp, resblks, XFS_SYMLINK_LOG_RES(mp), 0, |
1548 | XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT); | |
1549 | if (error == ENOSPC && fs_blocks == 0) { | |
1550 | resblks = 0; | |
1551 | error = xfs_trans_reserve(tp, 0, XFS_SYMLINK_LOG_RES(mp), 0, | |
1552 | XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT); | |
1553 | } | |
1554 | if (error) { | |
1555 | cancel_flags = 0; | |
1da177e4 LT |
1556 | goto error_return; |
1557 | } | |
1558 | ||
f7c66ce3 | 1559 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
993386c1 | 1560 | unlock_dp_on_error = B_TRUE; |
1da177e4 LT |
1561 | |
1562 | /* | |
1563 | * Check whether the directory allows new symlinks or not. | |
1564 | */ | |
1565 | if (dp->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) { | |
1566 | error = XFS_ERROR(EPERM); | |
1567 | goto error_return; | |
1568 | } | |
1569 | ||
1570 | /* | |
1571 | * Reserve disk quota : blocks and inode. | |
1572 | */ | |
7d095257 | 1573 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, resblks, 1, 0); |
1da177e4 LT |
1574 | if (error) |
1575 | goto error_return; | |
1576 | ||
1577 | /* | |
1578 | * Check for ability to enter directory entry, if no space reserved. | |
1579 | */ | |
556b8b16 BN |
1580 | error = xfs_dir_canenter(tp, dp, link_name, resblks); |
1581 | if (error) | |
1da177e4 LT |
1582 | goto error_return; |
1583 | /* | |
1584 | * Initialize the bmap freelist prior to calling either | |
1585 | * bmapi or the directory create code. | |
1586 | */ | |
9d87c319 | 1587 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 LT |
1588 | |
1589 | /* | |
1590 | * Allocate an inode for the symlink. | |
1591 | */ | |
6c77b0ea CH |
1592 | error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (mode & ~S_IFMT), 1, 0, |
1593 | prid, resblks > 0, &ip, NULL); | |
1da177e4 LT |
1594 | if (error) { |
1595 | if (error == ENOSPC) | |
1596 | goto error_return; | |
1597 | goto error1; | |
1598 | } | |
1da177e4 | 1599 | |
993386c1 CH |
1600 | /* |
1601 | * An error after we've joined dp to the transaction will result in the | |
1602 | * transaction cancel unlocking dp so don't do it explicitly in the | |
1603 | * error path. | |
1604 | */ | |
898621d5 | 1605 | xfs_trans_ijoin_ref(tp, dp, XFS_ILOCK_EXCL); |
993386c1 | 1606 | unlock_dp_on_error = B_FALSE; |
1da177e4 LT |
1607 | |
1608 | /* | |
1609 | * Also attach the dquot(s) to it, if applicable. | |
1610 | */ | |
7d095257 | 1611 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp); |
1da177e4 LT |
1612 | |
1613 | if (resblks) | |
1614 | resblks -= XFS_IALLOC_SPACE_RES(mp); | |
1615 | /* | |
1616 | * If the symlink will fit into the inode, write it inline. | |
1617 | */ | |
1618 | if (pathlen <= XFS_IFORK_DSIZE(ip)) { | |
1619 | xfs_idata_realloc(ip, pathlen, XFS_DATA_FORK); | |
1620 | memcpy(ip->i_df.if_u1.if_data, target_path, pathlen); | |
1621 | ip->i_d.di_size = pathlen; | |
1622 | ||
1623 | /* | |
1624 | * The inode was initially created in extent format. | |
1625 | */ | |
1626 | ip->i_df.if_flags &= ~(XFS_IFEXTENTS | XFS_IFBROOT); | |
1627 | ip->i_df.if_flags |= XFS_IFINLINE; | |
1628 | ||
1629 | ip->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
1630 | xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE); | |
1631 | ||
1632 | } else { | |
1633 | first_fsb = 0; | |
1634 | nmaps = SYMLINK_MAPS; | |
1635 | ||
c0dc7828 DC |
1636 | error = xfs_bmapi_write(tp, ip, first_fsb, fs_blocks, |
1637 | XFS_BMAPI_METADATA, &first_block, resblks, | |
1638 | mval, &nmaps, &free_list); | |
ec3ba85f CH |
1639 | if (error) |
1640 | goto error2; | |
1da177e4 LT |
1641 | |
1642 | if (resblks) | |
1643 | resblks -= fs_blocks; | |
1644 | ip->i_d.di_size = pathlen; | |
1645 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
1646 | ||
1647 | cur_chunk = target_path; | |
1648 | for (n = 0; n < nmaps; n++) { | |
1649 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); | |
1650 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
1651 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, | |
1652 | BTOBB(byte_cnt), 0); | |
2a30f36d CS |
1653 | if (!bp) { |
1654 | error = ENOMEM; | |
1655 | goto error2; | |
1656 | } | |
1da177e4 LT |
1657 | if (pathlen < byte_cnt) { |
1658 | byte_cnt = pathlen; | |
1659 | } | |
1660 | pathlen -= byte_cnt; | |
1661 | ||
62926044 | 1662 | memcpy(bp->b_addr, cur_chunk, byte_cnt); |
1da177e4 LT |
1663 | cur_chunk += byte_cnt; |
1664 | ||
1665 | xfs_trans_log_buf(tp, bp, 0, byte_cnt - 1); | |
1666 | } | |
1667 | } | |
1668 | ||
1669 | /* | |
1670 | * Create the directory entry for the symlink. | |
1671 | */ | |
556b8b16 BN |
1672 | error = xfs_dir_createname(tp, dp, link_name, ip->i_ino, |
1673 | &first_block, &free_list, resblks); | |
f6c2d1fa | 1674 | if (error) |
ec3ba85f | 1675 | goto error2; |
dcd79a14 | 1676 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1da177e4 LT |
1677 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); |
1678 | ||
1da177e4 LT |
1679 | /* |
1680 | * If this is a synchronous mount, make sure that the | |
1681 | * symlink transaction goes to disk before returning to | |
1682 | * the user. | |
1683 | */ | |
1684 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
1685 | xfs_trans_set_sync(tp); | |
1686 | } | |
1687 | ||
f7c99b6f | 1688 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
1689 | if (error) { |
1690 | goto error2; | |
1691 | } | |
1c72bf90 | 1692 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
7d095257 CH |
1693 | xfs_qm_dqrele(udqp); |
1694 | xfs_qm_dqrele(gdqp); | |
1da177e4 | 1695 | |
288699fe CH |
1696 | *ipp = ip; |
1697 | return 0; | |
1da177e4 LT |
1698 | |
1699 | error2: | |
1700 | IRELE(ip); | |
1701 | error1: | |
1702 | xfs_bmap_cancel(&free_list); | |
1703 | cancel_flags |= XFS_TRANS_ABORT; | |
1704 | error_return: | |
1705 | xfs_trans_cancel(tp, cancel_flags); | |
7d095257 CH |
1706 | xfs_qm_dqrele(udqp); |
1707 | xfs_qm_dqrele(gdqp); | |
1da177e4 | 1708 | |
993386c1 | 1709 | if (unlock_dp_on_error) |
1da177e4 | 1710 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
288699fe CH |
1711 | std_return: |
1712 | return error; | |
1da177e4 LT |
1713 | } |
1714 | ||
1da177e4 | 1715 | int |
993386c1 CH |
1716 | xfs_set_dmattrs( |
1717 | xfs_inode_t *ip, | |
1da177e4 | 1718 | u_int evmask, |
993386c1 | 1719 | u_int16_t state) |
1da177e4 | 1720 | { |
993386c1 | 1721 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 | 1722 | xfs_trans_t *tp; |
1da177e4 LT |
1723 | int error; |
1724 | ||
1725 | if (!capable(CAP_SYS_ADMIN)) | |
1726 | return XFS_ERROR(EPERM); | |
1727 | ||
1da177e4 LT |
1728 | if (XFS_FORCED_SHUTDOWN(mp)) |
1729 | return XFS_ERROR(EIO); | |
1730 | ||
1731 | tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS); | |
1732 | error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES (mp), 0, 0, 0); | |
1733 | if (error) { | |
1734 | xfs_trans_cancel(tp, 0); | |
1735 | return error; | |
1736 | } | |
1737 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
898621d5 | 1738 | xfs_trans_ijoin_ref(tp, ip, XFS_ILOCK_EXCL); |
1da177e4 | 1739 | |
613d7043 CH |
1740 | ip->i_d.di_dmevmask = evmask; |
1741 | ip->i_d.di_dmstate = state; | |
1da177e4 LT |
1742 | |
1743 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
1c72bf90 | 1744 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
1745 | |
1746 | return error; | |
1747 | } | |
1748 | ||
1da177e4 LT |
1749 | /* |
1750 | * xfs_alloc_file_space() | |
1751 | * This routine allocates disk space for the given file. | |
1752 | * | |
1753 | * If alloc_type == 0, this request is for an ALLOCSP type | |
1754 | * request which will change the file size. In this case, no | |
1755 | * DMAPI event will be generated by the call. A TRUNCATE event | |
1756 | * will be generated later by xfs_setattr. | |
1757 | * | |
1758 | * If alloc_type != 0, this request is for a RESVSP type | |
1759 | * request, and a DMAPI DM_EVENT_WRITE will be generated if the | |
1760 | * lower block boundary byte address is less than the file's | |
1761 | * length. | |
1762 | * | |
1763 | * RETURNS: | |
1764 | * 0 on success | |
1765 | * errno on error | |
1766 | * | |
1767 | */ | |
ba0f32d4 | 1768 | STATIC int |
1da177e4 LT |
1769 | xfs_alloc_file_space( |
1770 | xfs_inode_t *ip, | |
1771 | xfs_off_t offset, | |
1772 | xfs_off_t len, | |
1773 | int alloc_type, | |
1774 | int attr_flags) | |
1775 | { | |
dd9f438e NS |
1776 | xfs_mount_t *mp = ip->i_mount; |
1777 | xfs_off_t count; | |
1da177e4 LT |
1778 | xfs_filblks_t allocated_fsb; |
1779 | xfs_filblks_t allocatesize_fsb; | |
dd9f438e NS |
1780 | xfs_extlen_t extsz, temp; |
1781 | xfs_fileoff_t startoffset_fsb; | |
1da177e4 | 1782 | xfs_fsblock_t firstfsb; |
dd9f438e | 1783 | int nimaps; |
dd9f438e | 1784 | int quota_flag; |
1da177e4 | 1785 | int rt; |
1da177e4 | 1786 | xfs_trans_t *tp; |
dd9f438e NS |
1787 | xfs_bmbt_irec_t imaps[1], *imapp; |
1788 | xfs_bmap_free_t free_list; | |
1789 | uint qblocks, resblks, resrtextents; | |
1790 | int committed; | |
1791 | int error; | |
1da177e4 | 1792 | |
cca28fb8 | 1793 | trace_xfs_alloc_file_space(ip); |
1da177e4 LT |
1794 | |
1795 | if (XFS_FORCED_SHUTDOWN(mp)) | |
1796 | return XFS_ERROR(EIO); | |
1797 | ||
7d095257 CH |
1798 | error = xfs_qm_dqattach(ip, 0); |
1799 | if (error) | |
1da177e4 LT |
1800 | return error; |
1801 | ||
1802 | if (len <= 0) | |
1803 | return XFS_ERROR(EINVAL); | |
1804 | ||
957d0ebe DC |
1805 | rt = XFS_IS_REALTIME_INODE(ip); |
1806 | extsz = xfs_get_extsz_hint(ip); | |
1807 | ||
1da177e4 | 1808 | count = len; |
1da177e4 | 1809 | imapp = &imaps[0]; |
dd9f438e | 1810 | nimaps = 1; |
1da177e4 LT |
1811 | startoffset_fsb = XFS_B_TO_FSBT(mp, offset); |
1812 | allocatesize_fsb = XFS_B_TO_FSB(mp, count); | |
1813 | ||
1da177e4 | 1814 | /* |
dd9f438e | 1815 | * Allocate file space until done or until there is an error |
1da177e4 | 1816 | */ |
1da177e4 | 1817 | while (allocatesize_fsb && !error) { |
dd9f438e NS |
1818 | xfs_fileoff_t s, e; |
1819 | ||
1da177e4 | 1820 | /* |
3ddb8fa9 | 1821 | * Determine space reservations for data/realtime. |
1da177e4 | 1822 | */ |
dd9f438e | 1823 | if (unlikely(extsz)) { |
1da177e4 | 1824 | s = startoffset_fsb; |
dd9f438e NS |
1825 | do_div(s, extsz); |
1826 | s *= extsz; | |
1827 | e = startoffset_fsb + allocatesize_fsb; | |
1828 | if ((temp = do_mod(startoffset_fsb, extsz))) | |
1829 | e += temp; | |
1830 | if ((temp = do_mod(e, extsz))) | |
1831 | e += extsz - temp; | |
1832 | } else { | |
1833 | s = 0; | |
1834 | e = allocatesize_fsb; | |
1835 | } | |
1836 | ||
72656c46 DC |
1837 | /* |
1838 | * The transaction reservation is limited to a 32-bit block | |
1839 | * count, hence we need to limit the number of blocks we are | |
1840 | * trying to reserve to avoid an overflow. We can't allocate | |
1841 | * more than @nimaps extents, and an extent is limited on disk | |
1842 | * to MAXEXTLEN (21 bits), so use that to enforce the limit. | |
1843 | */ | |
1844 | resblks = min_t(xfs_fileoff_t, (e - s), (MAXEXTLEN * nimaps)); | |
dd9f438e | 1845 | if (unlikely(rt)) { |
72656c46 | 1846 | resrtextents = qblocks = resblks; |
dd9f438e NS |
1847 | resrtextents /= mp->m_sb.sb_rextsize; |
1848 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); | |
1849 | quota_flag = XFS_QMOPT_RES_RTBLKS; | |
1da177e4 | 1850 | } else { |
dd9f438e | 1851 | resrtextents = 0; |
72656c46 | 1852 | resblks = qblocks = XFS_DIOSTRAT_SPACE_RES(mp, resblks); |
dd9f438e | 1853 | quota_flag = XFS_QMOPT_RES_REGBLKS; |
1da177e4 LT |
1854 | } |
1855 | ||
1856 | /* | |
dd9f438e | 1857 | * Allocate and setup the transaction. |
1da177e4 LT |
1858 | */ |
1859 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); | |
dd9f438e NS |
1860 | error = xfs_trans_reserve(tp, resblks, |
1861 | XFS_WRITE_LOG_RES(mp), resrtextents, | |
1da177e4 LT |
1862 | XFS_TRANS_PERM_LOG_RES, |
1863 | XFS_WRITE_LOG_COUNT); | |
1da177e4 | 1864 | /* |
dd9f438e | 1865 | * Check for running out of space |
1da177e4 LT |
1866 | */ |
1867 | if (error) { | |
1868 | /* | |
1869 | * Free the transaction structure. | |
1870 | */ | |
1871 | ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); | |
1872 | xfs_trans_cancel(tp, 0); | |
1873 | break; | |
1874 | } | |
1875 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
7d095257 CH |
1876 | error = xfs_trans_reserve_quota_nblks(tp, ip, qblocks, |
1877 | 0, quota_flag); | |
1da177e4 LT |
1878 | if (error) |
1879 | goto error1; | |
1880 | ||
898621d5 | 1881 | xfs_trans_ijoin(tp, ip); |
1da177e4 | 1882 | |
9d87c319 | 1883 | xfs_bmap_init(&free_list, &firstfsb); |
c0dc7828 DC |
1884 | error = xfs_bmapi_write(tp, ip, startoffset_fsb, |
1885 | allocatesize_fsb, alloc_type, &firstfsb, | |
1886 | 0, imapp, &nimaps, &free_list); | |
1da177e4 LT |
1887 | if (error) { |
1888 | goto error0; | |
1889 | } | |
1890 | ||
1891 | /* | |
dd9f438e | 1892 | * Complete the transaction |
1da177e4 | 1893 | */ |
f7c99b6f | 1894 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
1895 | if (error) { |
1896 | goto error0; | |
1897 | } | |
1898 | ||
1c72bf90 | 1899 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
1900 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
1901 | if (error) { | |
1902 | break; | |
1903 | } | |
1904 | ||
1905 | allocated_fsb = imapp->br_blockcount; | |
1906 | ||
dd9f438e | 1907 | if (nimaps == 0) { |
1da177e4 LT |
1908 | error = XFS_ERROR(ENOSPC); |
1909 | break; | |
1910 | } | |
1911 | ||
1912 | startoffset_fsb += allocated_fsb; | |
1913 | allocatesize_fsb -= allocated_fsb; | |
1914 | } | |
1da177e4 LT |
1915 | |
1916 | return error; | |
1917 | ||
dd9f438e | 1918 | error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */ |
1da177e4 | 1919 | xfs_bmap_cancel(&free_list); |
7d095257 | 1920 | xfs_trans_unreserve_quota_nblks(tp, ip, qblocks, 0, quota_flag); |
dd9f438e NS |
1921 | |
1922 | error1: /* Just cancel transaction */ | |
1da177e4 LT |
1923 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
1924 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
288699fe | 1925 | return error; |
1da177e4 LT |
1926 | } |
1927 | ||
1928 | /* | |
1929 | * Zero file bytes between startoff and endoff inclusive. | |
1930 | * The iolock is held exclusive and no blocks are buffered. | |
2fd6f6ec LM |
1931 | * |
1932 | * This function is used by xfs_free_file_space() to zero | |
1933 | * partial blocks when the range to free is not block aligned. | |
1934 | * When unreserving space with boundaries that are not block | |
1935 | * aligned we round up the start and round down the end | |
1936 | * boundaries and then use this function to zero the parts of | |
1937 | * the blocks that got dropped during the rounding. | |
1da177e4 LT |
1938 | */ |
1939 | STATIC int | |
1940 | xfs_zero_remaining_bytes( | |
1941 | xfs_inode_t *ip, | |
1942 | xfs_off_t startoff, | |
1943 | xfs_off_t endoff) | |
1944 | { | |
1945 | xfs_bmbt_irec_t imap; | |
1946 | xfs_fileoff_t offset_fsb; | |
1947 | xfs_off_t lastoffset; | |
1948 | xfs_off_t offset; | |
1949 | xfs_buf_t *bp; | |
1950 | xfs_mount_t *mp = ip->i_mount; | |
1951 | int nimap; | |
1952 | int error = 0; | |
1953 | ||
2fd6f6ec LM |
1954 | /* |
1955 | * Avoid doing I/O beyond eof - it's not necessary | |
1956 | * since nothing can read beyond eof. The space will | |
1957 | * be zeroed when the file is extended anyway. | |
1958 | */ | |
1959 | if (startoff >= ip->i_size) | |
1960 | return 0; | |
1961 | ||
1962 | if (endoff > ip->i_size) | |
1963 | endoff = ip->i_size; | |
1964 | ||
686865f7 DC |
1965 | bp = xfs_buf_get_uncached(XFS_IS_REALTIME_INODE(ip) ? |
1966 | mp->m_rtdev_targp : mp->m_ddev_targp, | |
1967 | mp->m_sb.sb_blocksize, XBF_DONT_BLOCK); | |
c6422617 LM |
1968 | if (!bp) |
1969 | return XFS_ERROR(ENOMEM); | |
1da177e4 | 1970 | |
c8da0faf CH |
1971 | xfs_buf_unlock(bp); |
1972 | ||
1da177e4 LT |
1973 | for (offset = startoff; offset <= endoff; offset = lastoffset + 1) { |
1974 | offset_fsb = XFS_B_TO_FSBT(mp, offset); | |
1975 | nimap = 1; | |
5c8ed202 | 1976 | error = xfs_bmapi_read(ip, offset_fsb, 1, &imap, &nimap, 0); |
1da177e4 LT |
1977 | if (error || nimap < 1) |
1978 | break; | |
1979 | ASSERT(imap.br_blockcount >= 1); | |
1980 | ASSERT(imap.br_startoff == offset_fsb); | |
1981 | lastoffset = XFS_FSB_TO_B(mp, imap.br_startoff + 1) - 1; | |
1982 | if (lastoffset > endoff) | |
1983 | lastoffset = endoff; | |
1984 | if (imap.br_startblock == HOLESTARTBLOCK) | |
1985 | continue; | |
1986 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
1987 | if (imap.br_state == XFS_EXT_UNWRITTEN) | |
1988 | continue; | |
1989 | XFS_BUF_UNDONE(bp); | |
1990 | XFS_BUF_UNWRITE(bp); | |
1991 | XFS_BUF_READ(bp); | |
9d87c319 | 1992 | XFS_BUF_SET_ADDR(bp, xfs_fsb_to_db(ip, imap.br_startblock)); |
1da177e4 | 1993 | xfsbdstrat(mp, bp); |
1a1a3e97 | 1994 | error = xfs_buf_iowait(bp); |
d64e31a2 | 1995 | if (error) { |
1da177e4 LT |
1996 | xfs_ioerror_alert("xfs_zero_remaining_bytes(read)", |
1997 | mp, bp, XFS_BUF_ADDR(bp)); | |
1998 | break; | |
1999 | } | |
62926044 | 2000 | memset(bp->b_addr + |
1da177e4 LT |
2001 | (offset - XFS_FSB_TO_B(mp, imap.br_startoff)), |
2002 | 0, lastoffset - offset + 1); | |
2003 | XFS_BUF_UNDONE(bp); | |
2004 | XFS_BUF_UNREAD(bp); | |
2005 | XFS_BUF_WRITE(bp); | |
2006 | xfsbdstrat(mp, bp); | |
1a1a3e97 | 2007 | error = xfs_buf_iowait(bp); |
d64e31a2 | 2008 | if (error) { |
1da177e4 LT |
2009 | xfs_ioerror_alert("xfs_zero_remaining_bytes(write)", |
2010 | mp, bp, XFS_BUF_ADDR(bp)); | |
2011 | break; | |
2012 | } | |
2013 | } | |
2014 | xfs_buf_free(bp); | |
2015 | return error; | |
2016 | } | |
2017 | ||
2018 | /* | |
2019 | * xfs_free_file_space() | |
2020 | * This routine frees disk space for the given file. | |
2021 | * | |
2022 | * This routine is only called by xfs_change_file_space | |
2023 | * for an UNRESVSP type call. | |
2024 | * | |
2025 | * RETURNS: | |
2026 | * 0 on success | |
2027 | * errno on error | |
2028 | * | |
2029 | */ | |
2030 | STATIC int | |
2031 | xfs_free_file_space( | |
2032 | xfs_inode_t *ip, | |
2033 | xfs_off_t offset, | |
2034 | xfs_off_t len, | |
2035 | int attr_flags) | |
2036 | { | |
2037 | int committed; | |
2038 | int done; | |
1da177e4 LT |
2039 | xfs_fileoff_t endoffset_fsb; |
2040 | int error; | |
2041 | xfs_fsblock_t firstfsb; | |
2042 | xfs_bmap_free_t free_list; | |
1da177e4 LT |
2043 | xfs_bmbt_irec_t imap; |
2044 | xfs_off_t ioffset; | |
2045 | xfs_extlen_t mod=0; | |
2046 | xfs_mount_t *mp; | |
2047 | int nimap; | |
2048 | uint resblks; | |
673cdf5c | 2049 | uint rounding; |
1da177e4 LT |
2050 | int rt; |
2051 | xfs_fileoff_t startoffset_fsb; | |
2052 | xfs_trans_t *tp; | |
5fcbab35 | 2053 | int need_iolock = 1; |
1da177e4 | 2054 | |
1da177e4 LT |
2055 | mp = ip->i_mount; |
2056 | ||
cca28fb8 | 2057 | trace_xfs_free_file_space(ip); |
bd5a876a | 2058 | |
7d095257 CH |
2059 | error = xfs_qm_dqattach(ip, 0); |
2060 | if (error) | |
1da177e4 LT |
2061 | return error; |
2062 | ||
2063 | error = 0; | |
2064 | if (len <= 0) /* if nothing being freed */ | |
2065 | return error; | |
71ddabb9 | 2066 | rt = XFS_IS_REALTIME_INODE(ip); |
1da177e4 | 2067 | startoffset_fsb = XFS_B_TO_FSB(mp, offset); |
288699fe | 2068 | endoffset_fsb = XFS_B_TO_FSBT(mp, offset + len); |
1da177e4 | 2069 | |
0f285c8a | 2070 | if (attr_flags & XFS_ATTR_NOLOCK) |
5fcbab35 | 2071 | need_iolock = 0; |
9fa8046f | 2072 | if (need_iolock) { |
1da177e4 | 2073 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
25e41b3d | 2074 | /* wait for the completion of any pending DIOs */ |
4a06fd26 | 2075 | inode_dio_wait(VFS_I(ip)); |
9fa8046f | 2076 | } |
5fcbab35 | 2077 | |
e6a4b37f | 2078 | rounding = max_t(uint, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE); |
1da177e4 | 2079 | ioffset = offset & ~(rounding - 1); |
bd5a876a | 2080 | |
df80c933 | 2081 | if (VN_CACHED(VFS_I(ip)) != 0) { |
e6a4b37f | 2082 | error = xfs_flushinval_pages(ip, ioffset, -1, FI_REMAPF_LOCKED); |
d3cf2094 LM |
2083 | if (error) |
2084 | goto out_unlock_iolock; | |
bd5a876a CH |
2085 | } |
2086 | ||
1da177e4 LT |
2087 | /* |
2088 | * Need to zero the stuff we're not freeing, on disk. | |
9da096fd | 2089 | * If it's a realtime file & can't use unwritten extents then we |
1da177e4 LT |
2090 | * actually need to zero the extent edges. Otherwise xfs_bunmapi |
2091 | * will take care of it for us. | |
2092 | */ | |
62118709 | 2093 | if (rt && !xfs_sb_version_hasextflgbit(&mp->m_sb)) { |
1da177e4 | 2094 | nimap = 1; |
5c8ed202 DC |
2095 | error = xfs_bmapi_read(ip, startoffset_fsb, 1, |
2096 | &imap, &nimap, 0); | |
1da177e4 LT |
2097 | if (error) |
2098 | goto out_unlock_iolock; | |
2099 | ASSERT(nimap == 0 || nimap == 1); | |
2100 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { | |
2101 | xfs_daddr_t block; | |
2102 | ||
2103 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
2104 | block = imap.br_startblock; | |
2105 | mod = do_div(block, mp->m_sb.sb_rextsize); | |
2106 | if (mod) | |
2107 | startoffset_fsb += mp->m_sb.sb_rextsize - mod; | |
2108 | } | |
2109 | nimap = 1; | |
5c8ed202 DC |
2110 | error = xfs_bmapi_read(ip, endoffset_fsb - 1, 1, |
2111 | &imap, &nimap, 0); | |
1da177e4 LT |
2112 | if (error) |
2113 | goto out_unlock_iolock; | |
2114 | ASSERT(nimap == 0 || nimap == 1); | |
2115 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { | |
2116 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
2117 | mod++; | |
2118 | if (mod && (mod != mp->m_sb.sb_rextsize)) | |
2119 | endoffset_fsb -= mod; | |
2120 | } | |
2121 | } | |
2122 | if ((done = (endoffset_fsb <= startoffset_fsb))) | |
2123 | /* | |
2124 | * One contiguous piece to clear | |
2125 | */ | |
2126 | error = xfs_zero_remaining_bytes(ip, offset, offset + len - 1); | |
2127 | else { | |
2128 | /* | |
2129 | * Some full blocks, possibly two pieces to clear | |
2130 | */ | |
2131 | if (offset < XFS_FSB_TO_B(mp, startoffset_fsb)) | |
2132 | error = xfs_zero_remaining_bytes(ip, offset, | |
2133 | XFS_FSB_TO_B(mp, startoffset_fsb) - 1); | |
2134 | if (!error && | |
2135 | XFS_FSB_TO_B(mp, endoffset_fsb) < offset + len) | |
2136 | error = xfs_zero_remaining_bytes(ip, | |
2137 | XFS_FSB_TO_B(mp, endoffset_fsb), | |
2138 | offset + len - 1); | |
2139 | } | |
2140 | ||
2141 | /* | |
2142 | * free file space until done or until there is an error | |
2143 | */ | |
2144 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); | |
2145 | while (!error && !done) { | |
2146 | ||
2147 | /* | |
91ebecc7 DC |
2148 | * allocate and setup the transaction. Allow this |
2149 | * transaction to dip into the reserve blocks to ensure | |
2150 | * the freeing of the space succeeds at ENOSPC. | |
1da177e4 LT |
2151 | */ |
2152 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); | |
91ebecc7 | 2153 | tp->t_flags |= XFS_TRANS_RESERVE; |
1da177e4 LT |
2154 | error = xfs_trans_reserve(tp, |
2155 | resblks, | |
2156 | XFS_WRITE_LOG_RES(mp), | |
2157 | 0, | |
2158 | XFS_TRANS_PERM_LOG_RES, | |
2159 | XFS_WRITE_LOG_COUNT); | |
2160 | ||
2161 | /* | |
2162 | * check for running out of space | |
2163 | */ | |
2164 | if (error) { | |
2165 | /* | |
2166 | * Free the transaction structure. | |
2167 | */ | |
2168 | ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); | |
2169 | xfs_trans_cancel(tp, 0); | |
2170 | break; | |
2171 | } | |
2172 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
7d095257 CH |
2173 | error = xfs_trans_reserve_quota(tp, mp, |
2174 | ip->i_udquot, ip->i_gdquot, | |
2175 | resblks, 0, XFS_QMOPT_RES_REGBLKS); | |
1da177e4 LT |
2176 | if (error) |
2177 | goto error1; | |
2178 | ||
898621d5 | 2179 | xfs_trans_ijoin(tp, ip); |
1da177e4 LT |
2180 | |
2181 | /* | |
2182 | * issue the bunmapi() call to free the blocks | |
2183 | */ | |
9d87c319 | 2184 | xfs_bmap_init(&free_list, &firstfsb); |
541d7d3c | 2185 | error = xfs_bunmapi(tp, ip, startoffset_fsb, |
1da177e4 | 2186 | endoffset_fsb - startoffset_fsb, |
b4e9181e | 2187 | 0, 2, &firstfsb, &free_list, &done); |
1da177e4 LT |
2188 | if (error) { |
2189 | goto error0; | |
2190 | } | |
2191 | ||
2192 | /* | |
2193 | * complete the transaction | |
2194 | */ | |
f7c99b6f | 2195 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
2196 | if (error) { |
2197 | goto error0; | |
2198 | } | |
2199 | ||
1c72bf90 | 2200 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
2201 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
2202 | } | |
2203 | ||
2204 | out_unlock_iolock: | |
2205 | if (need_iolock) | |
2206 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
2207 | return error; | |
2208 | ||
2209 | error0: | |
2210 | xfs_bmap_cancel(&free_list); | |
2211 | error1: | |
2212 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
2213 | xfs_iunlock(ip, need_iolock ? (XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL) : | |
2214 | XFS_ILOCK_EXCL); | |
2215 | return error; | |
2216 | } | |
2217 | ||
2218 | /* | |
2219 | * xfs_change_file_space() | |
2220 | * This routine allocates or frees disk space for the given file. | |
2221 | * The user specified parameters are checked for alignment and size | |
2222 | * limitations. | |
2223 | * | |
2224 | * RETURNS: | |
2225 | * 0 on success | |
2226 | * errno on error | |
2227 | * | |
2228 | */ | |
2229 | int | |
2230 | xfs_change_file_space( | |
993386c1 | 2231 | xfs_inode_t *ip, |
1da177e4 LT |
2232 | int cmd, |
2233 | xfs_flock64_t *bf, | |
2234 | xfs_off_t offset, | |
1da177e4 LT |
2235 | int attr_flags) |
2236 | { | |
993386c1 | 2237 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 LT |
2238 | int clrprealloc; |
2239 | int error; | |
2240 | xfs_fsize_t fsize; | |
1da177e4 LT |
2241 | int setprealloc; |
2242 | xfs_off_t startoffset; | |
2243 | xfs_off_t llen; | |
2244 | xfs_trans_t *tp; | |
0f285c8a | 2245 | struct iattr iattr; |
44722352 | 2246 | int prealloc_type; |
1da177e4 | 2247 | |
993386c1 | 2248 | if (!S_ISREG(ip->i_d.di_mode)) |
1da177e4 LT |
2249 | return XFS_ERROR(EINVAL); |
2250 | ||
1da177e4 LT |
2251 | switch (bf->l_whence) { |
2252 | case 0: /*SEEK_SET*/ | |
2253 | break; | |
2254 | case 1: /*SEEK_CUR*/ | |
2255 | bf->l_start += offset; | |
2256 | break; | |
2257 | case 2: /*SEEK_END*/ | |
ba87ea69 | 2258 | bf->l_start += ip->i_size; |
1da177e4 LT |
2259 | break; |
2260 | default: | |
2261 | return XFS_ERROR(EINVAL); | |
2262 | } | |
2263 | ||
2264 | llen = bf->l_len > 0 ? bf->l_len - 1 : bf->l_len; | |
2265 | ||
2266 | if ( (bf->l_start < 0) | |
2267 | || (bf->l_start > XFS_MAXIOFFSET(mp)) | |
2268 | || (bf->l_start + llen < 0) | |
2269 | || (bf->l_start + llen > XFS_MAXIOFFSET(mp))) | |
2270 | return XFS_ERROR(EINVAL); | |
2271 | ||
2272 | bf->l_whence = 0; | |
2273 | ||
2274 | startoffset = bf->l_start; | |
ba87ea69 | 2275 | fsize = ip->i_size; |
1da177e4 LT |
2276 | |
2277 | /* | |
2278 | * XFS_IOC_RESVSP and XFS_IOC_UNRESVSP will reserve or unreserve | |
2279 | * file space. | |
2280 | * These calls do NOT zero the data space allocated to the file, | |
2281 | * nor do they change the file size. | |
2282 | * | |
2283 | * XFS_IOC_ALLOCSP and XFS_IOC_FREESP will allocate and free file | |
2284 | * space. | |
2285 | * These calls cause the new file data to be zeroed and the file | |
2286 | * size to be changed. | |
2287 | */ | |
2288 | setprealloc = clrprealloc = 0; | |
44722352 | 2289 | prealloc_type = XFS_BMAPI_PREALLOC; |
1da177e4 LT |
2290 | |
2291 | switch (cmd) { | |
44722352 DC |
2292 | case XFS_IOC_ZERO_RANGE: |
2293 | prealloc_type |= XFS_BMAPI_CONVERT; | |
2294 | xfs_tosspages(ip, startoffset, startoffset + bf->l_len, 0); | |
2295 | /* FALLTHRU */ | |
1da177e4 LT |
2296 | case XFS_IOC_RESVSP: |
2297 | case XFS_IOC_RESVSP64: | |
2298 | error = xfs_alloc_file_space(ip, startoffset, bf->l_len, | |
44722352 | 2299 | prealloc_type, attr_flags); |
1da177e4 LT |
2300 | if (error) |
2301 | return error; | |
2302 | setprealloc = 1; | |
2303 | break; | |
2304 | ||
2305 | case XFS_IOC_UNRESVSP: | |
2306 | case XFS_IOC_UNRESVSP64: | |
2307 | if ((error = xfs_free_file_space(ip, startoffset, bf->l_len, | |
2308 | attr_flags))) | |
2309 | return error; | |
2310 | break; | |
2311 | ||
2312 | case XFS_IOC_ALLOCSP: | |
2313 | case XFS_IOC_ALLOCSP64: | |
2314 | case XFS_IOC_FREESP: | |
2315 | case XFS_IOC_FREESP64: | |
2316 | if (startoffset > fsize) { | |
2317 | error = xfs_alloc_file_space(ip, fsize, | |
2318 | startoffset - fsize, 0, attr_flags); | |
2319 | if (error) | |
2320 | break; | |
2321 | } | |
2322 | ||
0f285c8a CH |
2323 | iattr.ia_valid = ATTR_SIZE; |
2324 | iattr.ia_size = startoffset; | |
1da177e4 | 2325 | |
c4ed4243 | 2326 | error = xfs_setattr_size(ip, &iattr, attr_flags); |
1da177e4 LT |
2327 | |
2328 | if (error) | |
2329 | return error; | |
2330 | ||
2331 | clrprealloc = 1; | |
2332 | break; | |
2333 | ||
2334 | default: | |
2335 | ASSERT(0); | |
2336 | return XFS_ERROR(EINVAL); | |
2337 | } | |
2338 | ||
2339 | /* | |
2340 | * update the inode timestamp, mode, and prealloc flag bits | |
2341 | */ | |
2342 | tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID); | |
2343 | ||
2344 | if ((error = xfs_trans_reserve(tp, 0, XFS_WRITEID_LOG_RES(mp), | |
2345 | 0, 0, 0))) { | |
2346 | /* ASSERT(0); */ | |
2347 | xfs_trans_cancel(tp, 0); | |
2348 | return error; | |
2349 | } | |
2350 | ||
2351 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
2352 | ||
898621d5 | 2353 | xfs_trans_ijoin(tp, ip); |
1da177e4 | 2354 | |
0f285c8a | 2355 | if ((attr_flags & XFS_ATTR_DMI) == 0) { |
1da177e4 LT |
2356 | ip->i_d.di_mode &= ~S_ISUID; |
2357 | ||
2358 | /* | |
2359 | * Note that we don't have to worry about mandatory | |
2360 | * file locking being disabled here because we only | |
2361 | * clear the S_ISGID bit if the Group execute bit is | |
2362 | * on, but if it was on then mandatory locking wouldn't | |
2363 | * have been enabled. | |
2364 | */ | |
2365 | if (ip->i_d.di_mode & S_IXGRP) | |
2366 | ip->i_d.di_mode &= ~S_ISGID; | |
2367 | ||
dcd79a14 | 2368 | xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1da177e4 LT |
2369 | } |
2370 | if (setprealloc) | |
2371 | ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC; | |
2372 | else if (clrprealloc) | |
2373 | ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC; | |
2374 | ||
2375 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
82878897 DC |
2376 | if (attr_flags & XFS_ATTR_SYNC) |
2377 | xfs_trans_set_sync(tp); | |
1da177e4 | 2378 | |
1c72bf90 | 2379 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
2380 | |
2381 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
2382 | ||
2383 | return error; | |
2384 | } |