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 LT |
23 | #include "xfs_log.h" |
24 | #include "xfs_trans.h" | |
25 | #include "xfs_sb.h" | |
26 | #include "xfs_ag.h" | |
1da177e4 | 27 | #include "xfs_dir2.h" |
1da177e4 | 28 | #include "xfs_mount.h" |
a844f451 | 29 | #include "xfs_da_btree.h" |
1da177e4 LT |
30 | #include "xfs_bmap_btree.h" |
31 | #include "xfs_ialloc_btree.h" | |
1da177e4 | 32 | #include "xfs_dinode.h" |
1da177e4 | 33 | #include "xfs_inode.h" |
a844f451 | 34 | #include "xfs_inode_item.h" |
a844f451 | 35 | #include "xfs_itable.h" |
a844f451 NS |
36 | #include "xfs_ialloc.h" |
37 | #include "xfs_alloc.h" | |
1da177e4 | 38 | #include "xfs_bmap.h" |
ef14f0c1 | 39 | #include "xfs_acl.h" |
1da177e4 | 40 | #include "xfs_attr.h" |
1da177e4 | 41 | #include "xfs_error.h" |
1da177e4 LT |
42 | #include "xfs_quota.h" |
43 | #include "xfs_utils.h" | |
a844f451 | 44 | #include "xfs_rtalloc.h" |
1da177e4 | 45 | #include "xfs_trans_space.h" |
1da177e4 | 46 | #include "xfs_log_priv.h" |
2a82b8be | 47 | #include "xfs_filestream.h" |
993386c1 | 48 | #include "xfs_vnodeops.h" |
0b1b213f | 49 | #include "xfs_trace.h" |
1da177e4 | 50 | |
7d4fb40a NS |
51 | /* |
52 | * The maximum pathlen is 1024 bytes. Since the minimum file system | |
53 | * blocksize is 512 bytes, we can get a max of 2 extents back from | |
54 | * bmapi. | |
55 | */ | |
56 | #define SYMLINK_MAPS 2 | |
57 | ||
804c83c3 CH |
58 | STATIC int |
59 | xfs_readlink_bmap( | |
60 | xfs_inode_t *ip, | |
61 | char *link) | |
62 | { | |
63 | xfs_mount_t *mp = ip->i_mount; | |
64 | int pathlen = ip->i_d.di_size; | |
65 | int nmaps = SYMLINK_MAPS; | |
66 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; | |
67 | xfs_daddr_t d; | |
68 | int byte_cnt; | |
69 | int n; | |
70 | xfs_buf_t *bp; | |
71 | int error = 0; | |
72 | ||
5c8ed202 DC |
73 | error = xfs_bmapi_read(ip, 0, XFS_B_TO_FSB(mp, pathlen), mval, &nmaps, |
74 | 0); | |
804c83c3 CH |
75 | if (error) |
76 | goto out; | |
77 | ||
78 | for (n = 0; n < nmaps; n++) { | |
79 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); | |
80 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
81 | ||
611c9946 | 82 | bp = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt), 0); |
ac4d6888 CS |
83 | if (!bp) |
84 | return XFS_ERROR(ENOMEM); | |
e5702805 | 85 | error = bp->b_error; |
804c83c3 | 86 | if (error) { |
901796af | 87 | xfs_buf_ioerror_alert(bp, __func__); |
804c83c3 CH |
88 | xfs_buf_relse(bp); |
89 | goto out; | |
90 | } | |
91 | if (pathlen < byte_cnt) | |
92 | byte_cnt = pathlen; | |
93 | pathlen -= byte_cnt; | |
94 | ||
62926044 | 95 | memcpy(link, bp->b_addr, byte_cnt); |
804c83c3 CH |
96 | xfs_buf_relse(bp); |
97 | } | |
98 | ||
99 | link[ip->i_d.di_size] = '\0'; | |
100 | error = 0; | |
101 | ||
102 | out: | |
103 | return error; | |
104 | } | |
105 | ||
993386c1 | 106 | int |
1da177e4 | 107 | xfs_readlink( |
993386c1 | 108 | xfs_inode_t *ip, |
804c83c3 | 109 | char *link) |
1da177e4 | 110 | { |
804c83c3 | 111 | xfs_mount_t *mp = ip->i_mount; |
b52a360b | 112 | xfs_fsize_t pathlen; |
1da177e4 | 113 | int error = 0; |
1da177e4 | 114 | |
cca28fb8 | 115 | trace_xfs_readlink(ip); |
1da177e4 LT |
116 | |
117 | if (XFS_FORCED_SHUTDOWN(mp)) | |
118 | return XFS_ERROR(EIO); | |
119 | ||
120 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
121 | ||
804c83c3 CH |
122 | pathlen = ip->i_d.di_size; |
123 | if (!pathlen) | |
124 | goto out; | |
1da177e4 | 125 | |
b52a360b CM |
126 | if (pathlen < 0 || pathlen > MAXPATHLEN) { |
127 | xfs_alert(mp, "%s: inode (%llu) bad symlink length (%lld)", | |
128 | __func__, (unsigned long long) ip->i_ino, | |
129 | (long long) pathlen); | |
130 | ASSERT(0); | |
9b025eb3 JK |
131 | error = XFS_ERROR(EFSCORRUPTED); |
132 | goto out; | |
b52a360b CM |
133 | } |
134 | ||
135 | ||
1da177e4 | 136 | if (ip->i_df.if_flags & XFS_IFINLINE) { |
804c83c3 CH |
137 | memcpy(link, ip->i_df.if_u1.if_data, pathlen); |
138 | link[pathlen] = '\0'; | |
139 | } else { | |
140 | error = xfs_readlink_bmap(ip, link); | |
1da177e4 LT |
141 | } |
142 | ||
804c83c3 | 143 | out: |
1da177e4 | 144 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
1da177e4 LT |
145 | return error; |
146 | } | |
147 | ||
c56c9631 CH |
148 | /* |
149 | * Flags for xfs_free_eofblocks | |
150 | */ | |
151 | #define XFS_FREE_EOF_TRYLOCK (1<<0) | |
152 | ||
1da177e4 | 153 | /* |
92dfe8d2 DC |
154 | * This is called by xfs_inactive to free any blocks beyond eof |
155 | * when the link count isn't zero and by xfs_dm_punch_hole() when | |
156 | * punching a hole to EOF. | |
1da177e4 | 157 | */ |
d96f8f89 | 158 | STATIC int |
92dfe8d2 | 159 | xfs_free_eofblocks( |
1da177e4 | 160 | xfs_mount_t *mp, |
92dfe8d2 DC |
161 | xfs_inode_t *ip, |
162 | int flags) | |
1da177e4 LT |
163 | { |
164 | xfs_trans_t *tp; | |
165 | int error; | |
166 | xfs_fileoff_t end_fsb; | |
167 | xfs_fileoff_t last_fsb; | |
168 | xfs_filblks_t map_len; | |
169 | int nimaps; | |
170 | xfs_bmbt_irec_t imap; | |
171 | ||
172 | /* | |
173 | * Figure out if there are any blocks beyond the end | |
174 | * of the file. If not, then there is nothing to do. | |
175 | */ | |
ce7ae151 | 176 | end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_ISIZE(ip)); |
1da177e4 | 177 | last_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp)); |
3f34885c | 178 | if (last_fsb <= end_fsb) |
014c2544 | 179 | return 0; |
3f34885c | 180 | map_len = last_fsb - end_fsb; |
1da177e4 LT |
181 | |
182 | nimaps = 1; | |
183 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
5c8ed202 | 184 | error = xfs_bmapi_read(ip, end_fsb, map_len, &imap, &nimaps, 0); |
1da177e4 LT |
185 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
186 | ||
187 | if (!error && (nimaps != 0) && | |
68bdb6ea YL |
188 | (imap.br_startblock != HOLESTARTBLOCK || |
189 | ip->i_delayed_blks)) { | |
1da177e4 LT |
190 | /* |
191 | * Attach the dquots to the inode up front. | |
192 | */ | |
7d095257 CH |
193 | error = xfs_qm_dqattach(ip, 0); |
194 | if (error) | |
014c2544 | 195 | return error; |
1da177e4 LT |
196 | |
197 | /* | |
198 | * There are blocks after the end of file. | |
199 | * Free them up now by truncating the file to | |
200 | * its current size. | |
201 | */ | |
202 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
203 | ||
c56c9631 CH |
204 | if (flags & XFS_FREE_EOF_TRYLOCK) { |
205 | if (!xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL)) { | |
206 | xfs_trans_cancel(tp, 0); | |
207 | return 0; | |
208 | } | |
209 | } else { | |
92dfe8d2 | 210 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
c56c9631 | 211 | } |
1da177e4 LT |
212 | |
213 | error = xfs_trans_reserve(tp, 0, | |
214 | XFS_ITRUNCATE_LOG_RES(mp), | |
215 | 0, XFS_TRANS_PERM_LOG_RES, | |
216 | XFS_ITRUNCATE_LOG_COUNT); | |
217 | if (error) { | |
218 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
219 | xfs_trans_cancel(tp, 0); | |
220 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
014c2544 | 221 | return error; |
1da177e4 LT |
222 | } |
223 | ||
224 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
ddc3415a | 225 | xfs_trans_ijoin(tp, ip, 0); |
1da177e4 | 226 | |
673e8e59 CH |
227 | /* |
228 | * Do not update the on-disk file size. If we update the | |
229 | * on-disk file size and then the system crashes before the | |
230 | * contents of the file are flushed to disk then the files | |
231 | * may be full of holes (ie NULL files bug). | |
232 | */ | |
233 | error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, | |
ce7ae151 | 234 | XFS_ISIZE(ip)); |
1da177e4 | 235 | if (error) { |
8f04c47a CH |
236 | /* |
237 | * If we get an error at this point we simply don't | |
238 | * bother truncating the file. | |
239 | */ | |
1da177e4 LT |
240 | xfs_trans_cancel(tp, |
241 | (XFS_TRANS_RELEASE_LOG_RES | | |
242 | XFS_TRANS_ABORT)); | |
243 | } else { | |
244 | error = xfs_trans_commit(tp, | |
1c72bf90 | 245 | XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 | 246 | } |
c56c9631 | 247 | xfs_iunlock(ip, XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL); |
1da177e4 | 248 | } |
014c2544 | 249 | return error; |
1da177e4 LT |
250 | } |
251 | ||
252 | /* | |
253 | * Free a symlink that has blocks associated with it. | |
254 | */ | |
255 | STATIC int | |
256 | xfs_inactive_symlink_rmt( | |
257 | xfs_inode_t *ip, | |
258 | xfs_trans_t **tpp) | |
259 | { | |
260 | xfs_buf_t *bp; | |
261 | int committed; | |
262 | int done; | |
263 | int error; | |
264 | xfs_fsblock_t first_block; | |
265 | xfs_bmap_free_t free_list; | |
266 | int i; | |
267 | xfs_mount_t *mp; | |
268 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; | |
269 | int nmaps; | |
270 | xfs_trans_t *ntp; | |
271 | int size; | |
272 | xfs_trans_t *tp; | |
273 | ||
274 | tp = *tpp; | |
275 | mp = ip->i_mount; | |
276 | ASSERT(ip->i_d.di_size > XFS_IFORK_DSIZE(ip)); | |
277 | /* | |
278 | * We're freeing a symlink that has some | |
279 | * blocks allocated to it. Free the | |
280 | * blocks here. We know that we've got | |
281 | * either 1 or 2 extents and that we can | |
282 | * free them all in one bunmapi call. | |
283 | */ | |
284 | ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2); | |
285 | if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, | |
286 | XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) { | |
287 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
288 | xfs_trans_cancel(tp, 0); | |
289 | *tpp = NULL; | |
290 | return error; | |
291 | } | |
292 | /* | |
293 | * Lock the inode, fix the size, and join it to the transaction. | |
294 | * Hold it so in the normal path, we still have it locked for | |
295 | * the second transaction. In the error paths we need it | |
296 | * held so the cancel won't rele it, see below. | |
297 | */ | |
298 | xfs_ilock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
299 | size = (int)ip->i_d.di_size; | |
300 | ip->i_d.di_size = 0; | |
ddc3415a | 301 | xfs_trans_ijoin(tp, ip, 0); |
1da177e4 LT |
302 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
303 | /* | |
304 | * Find the block(s) so we can inval and unmap them. | |
305 | */ | |
306 | done = 0; | |
9d87c319 | 307 | xfs_bmap_init(&free_list, &first_block); |
e8c96f8c | 308 | nmaps = ARRAY_SIZE(mval); |
5c8ed202 DC |
309 | error = xfs_bmapi_read(ip, 0, XFS_B_TO_FSB(mp, size), |
310 | mval, &nmaps, 0); | |
311 | if (error) | |
1da177e4 LT |
312 | goto error0; |
313 | /* | |
314 | * Invalidate the block(s). | |
315 | */ | |
316 | for (i = 0; i < nmaps; i++) { | |
317 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, | |
318 | XFS_FSB_TO_DADDR(mp, mval[i].br_startblock), | |
319 | XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0); | |
2a30f36d CS |
320 | if (!bp) { |
321 | error = ENOMEM; | |
322 | goto error1; | |
323 | } | |
1da177e4 LT |
324 | xfs_trans_binval(tp, bp); |
325 | } | |
326 | /* | |
327 | * Unmap the dead block(s) to the free_list. | |
328 | */ | |
329 | if ((error = xfs_bunmapi(tp, ip, 0, size, XFS_BMAPI_METADATA, nmaps, | |
b4e9181e | 330 | &first_block, &free_list, &done))) |
1da177e4 LT |
331 | goto error1; |
332 | ASSERT(done); | |
333 | /* | |
334 | * Commit the first transaction. This logs the EFI and the inode. | |
335 | */ | |
f7c99b6f | 336 | if ((error = xfs_bmap_finish(&tp, &free_list, &committed))) |
1da177e4 LT |
337 | goto error1; |
338 | /* | |
339 | * The transaction must have been committed, since there were | |
340 | * actually extents freed by xfs_bunmapi. See xfs_bmap_finish. | |
341 | * The new tp has the extent freeing and EFDs. | |
342 | */ | |
343 | ASSERT(committed); | |
344 | /* | |
345 | * The first xact was committed, so add the inode to the new one. | |
346 | * Mark it dirty so it will be logged and moved forward in the log as | |
347 | * part of every commit. | |
348 | */ | |
ddc3415a | 349 | xfs_trans_ijoin(tp, ip, 0); |
1da177e4 LT |
350 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
351 | /* | |
352 | * Get a new, empty transaction to return to our caller. | |
353 | */ | |
354 | ntp = xfs_trans_dup(tp); | |
355 | /* | |
c41564b5 | 356 | * Commit the transaction containing extent freeing and EFDs. |
1da177e4 LT |
357 | * If we get an error on the commit here or on the reserve below, |
358 | * we need to unlock the inode since the new transaction doesn't | |
359 | * have the inode attached. | |
360 | */ | |
1c72bf90 | 361 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
362 | tp = ntp; |
363 | if (error) { | |
364 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
365 | goto error0; | |
366 | } | |
cc09c0dc DC |
367 | /* |
368 | * transaction commit worked ok so we can drop the extra ticket | |
369 | * reference that we gained in xfs_trans_dup() | |
370 | */ | |
371 | xfs_log_ticket_put(tp->t_ticket); | |
372 | ||
1da177e4 LT |
373 | /* |
374 | * Remove the memory for extent descriptions (just bookkeeping). | |
375 | */ | |
376 | if (ip->i_df.if_bytes) | |
377 | xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK); | |
378 | ASSERT(ip->i_df.if_bytes == 0); | |
379 | /* | |
380 | * Put an itruncate log reservation in the new transaction | |
381 | * for our caller. | |
382 | */ | |
383 | if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, | |
384 | XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) { | |
385 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
386 | goto error0; | |
387 | } | |
388 | /* | |
389 | * Return with the inode locked but not joined to the transaction. | |
390 | */ | |
391 | *tpp = tp; | |
392 | return 0; | |
393 | ||
394 | error1: | |
395 | xfs_bmap_cancel(&free_list); | |
396 | error0: | |
397 | /* | |
398 | * Have to come here with the inode locked and either | |
399 | * (held and in the transaction) or (not in the transaction). | |
400 | * If the inode isn't held then cancel would iput it, but | |
401 | * that's wrong since this is inactive and the vnode ref | |
402 | * count is 0 already. | |
403 | * Cancel won't do anything to the inode if held, but it still | |
404 | * needs to be locked until the cancel is done, if it was | |
405 | * joined to the transaction. | |
406 | */ | |
407 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
408 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
409 | *tpp = NULL; | |
410 | return error; | |
411 | ||
412 | } | |
413 | ||
414 | STATIC int | |
415 | xfs_inactive_symlink_local( | |
416 | xfs_inode_t *ip, | |
417 | xfs_trans_t **tpp) | |
418 | { | |
419 | int error; | |
420 | ||
421 | ASSERT(ip->i_d.di_size <= XFS_IFORK_DSIZE(ip)); | |
422 | /* | |
423 | * We're freeing a symlink which fit into | |
424 | * the inode. Just free the memory used | |
425 | * to hold the old symlink. | |
426 | */ | |
427 | error = xfs_trans_reserve(*tpp, 0, | |
428 | XFS_ITRUNCATE_LOG_RES(ip->i_mount), | |
429 | 0, XFS_TRANS_PERM_LOG_RES, | |
430 | XFS_ITRUNCATE_LOG_COUNT); | |
431 | ||
432 | if (error) { | |
433 | xfs_trans_cancel(*tpp, 0); | |
434 | *tpp = NULL; | |
014c2544 | 435 | return error; |
1da177e4 LT |
436 | } |
437 | xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
438 | ||
439 | /* | |
440 | * Zero length symlinks _can_ exist. | |
441 | */ | |
442 | if (ip->i_df.if_bytes > 0) { | |
443 | xfs_idata_realloc(ip, | |
444 | -(ip->i_df.if_bytes), | |
445 | XFS_DATA_FORK); | |
446 | ASSERT(ip->i_df.if_bytes == 0); | |
447 | } | |
014c2544 | 448 | return 0; |
1da177e4 LT |
449 | } |
450 | ||
1da177e4 LT |
451 | STATIC int |
452 | xfs_inactive_attrs( | |
453 | xfs_inode_t *ip, | |
454 | xfs_trans_t **tpp) | |
455 | { | |
456 | xfs_trans_t *tp; | |
457 | int error; | |
458 | xfs_mount_t *mp; | |
459 | ||
579aa9ca | 460 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
1da177e4 LT |
461 | tp = *tpp; |
462 | mp = ip->i_mount; | |
463 | ASSERT(ip->i_d.di_forkoff != 0); | |
e5720eec | 464 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 | 465 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
e5720eec DC |
466 | if (error) |
467 | goto error_unlock; | |
1da177e4 LT |
468 | |
469 | error = xfs_attr_inactive(ip); | |
e5720eec DC |
470 | if (error) |
471 | goto error_unlock; | |
1da177e4 LT |
472 | |
473 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
474 | error = xfs_trans_reserve(tp, 0, | |
475 | XFS_IFREE_LOG_RES(mp), | |
476 | 0, XFS_TRANS_PERM_LOG_RES, | |
477 | XFS_INACTIVE_LOG_COUNT); | |
e5720eec DC |
478 | if (error) |
479 | goto error_cancel; | |
1da177e4 LT |
480 | |
481 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
ddc3415a | 482 | xfs_trans_ijoin(tp, ip, 0); |
1da177e4 LT |
483 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); |
484 | ||
485 | ASSERT(ip->i_d.di_anextents == 0); | |
486 | ||
487 | *tpp = tp; | |
014c2544 | 488 | return 0; |
e5720eec DC |
489 | |
490 | error_cancel: | |
491 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
492 | xfs_trans_cancel(tp, 0); | |
493 | error_unlock: | |
494 | *tpp = NULL; | |
495 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
496 | return error; | |
1da177e4 LT |
497 | } |
498 | ||
993386c1 | 499 | int |
1da177e4 | 500 | xfs_release( |
993386c1 | 501 | xfs_inode_t *ip) |
1da177e4 | 502 | { |
993386c1 | 503 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 LT |
504 | int error; |
505 | ||
42173f68 | 506 | if (!S_ISREG(ip->i_d.di_mode) || (ip->i_d.di_mode == 0)) |
1da177e4 | 507 | return 0; |
1da177e4 LT |
508 | |
509 | /* If this is a read-only mount, don't do this (would generate I/O) */ | |
bd186aa9 | 510 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
1da177e4 LT |
511 | return 0; |
512 | ||
2a82b8be | 513 | if (!XFS_FORCED_SHUTDOWN(mp)) { |
b3aea4ed CH |
514 | int truncated; |
515 | ||
2a82b8be DC |
516 | /* |
517 | * If we are using filestreams, and we have an unlinked | |
518 | * file that we are processing the last close on, then nothing | |
519 | * will be able to reopen and write to this file. Purge this | |
520 | * inode from the filestreams cache so that it doesn't delay | |
521 | * teardown of the inode. | |
522 | */ | |
523 | if ((ip->i_d.di_nlink == 0) && xfs_inode_is_filestream(ip)) | |
524 | xfs_filestream_deassociate(ip); | |
525 | ||
fbf3ce8d CH |
526 | /* |
527 | * If we previously truncated this file and removed old data | |
528 | * in the process, we want to initiate "early" writeout on | |
529 | * the last close. This is an attempt to combat the notorious | |
25985edc | 530 | * NULL files problem which is particularly noticeable from a |
fbf3ce8d CH |
531 | * truncate down, buffered (re-)write (delalloc), followed by |
532 | * a crash. What we are effectively doing here is | |
533 | * significantly reducing the time window where we'd otherwise | |
534 | * be exposed to that problem. | |
535 | */ | |
09262b43 | 536 | truncated = xfs_iflags_test_and_clear(ip, XFS_ITRUNCATED); |
df4368a1 DC |
537 | if (truncated) { |
538 | xfs_iflags_clear(ip, XFS_IDIRTY_RELEASE); | |
539 | if (VN_DIRTY(VFS_I(ip)) && ip->i_delayed_blks > 0) | |
540 | xfs_flush_pages(ip, 0, -1, XBF_ASYNC, FI_NONE); | |
541 | } | |
fbf3ce8d CH |
542 | } |
543 | ||
6e857567 DC |
544 | if (ip->i_d.di_nlink == 0) |
545 | return 0; | |
c56c9631 | 546 | |
abbede1b | 547 | if ((S_ISREG(ip->i_d.di_mode) && |
ce7ae151 CH |
548 | (VFS_I(ip)->i_size > 0 || |
549 | (VN_CACHED(VFS_I(ip)) > 0 || ip->i_delayed_blks > 0)) && | |
6e857567 DC |
550 | (ip->i_df.if_flags & XFS_IFEXTENTS)) && |
551 | (!(ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)))) { | |
552 | ||
553 | /* | |
554 | * If we can't get the iolock just skip truncating the blocks | |
555 | * past EOF because we could deadlock with the mmap_sem | |
556 | * otherwise. We'll get another chance to drop them once the | |
557 | * last reference to the inode is dropped, so we'll never leak | |
558 | * blocks permanently. | |
559 | * | |
560 | * Further, check if the inode is being opened, written and | |
561 | * closed frequently and we have delayed allocation blocks | |
25985edc | 562 | * outstanding (e.g. streaming writes from the NFS server), |
6e857567 DC |
563 | * truncating the blocks past EOF will cause fragmentation to |
564 | * occur. | |
565 | * | |
566 | * In this case don't do the truncation, either, but we have to | |
567 | * be careful how we detect this case. Blocks beyond EOF show | |
568 | * up as i_delayed_blks even when the inode is clean, so we | |
569 | * need to truncate them away first before checking for a dirty | |
570 | * release. Hence on the first dirty close we will still remove | |
571 | * the speculative allocation, but after that we will leave it | |
572 | * in place. | |
573 | */ | |
574 | if (xfs_iflags_test(ip, XFS_IDIRTY_RELEASE)) | |
575 | return 0; | |
1da177e4 | 576 | |
6e857567 DC |
577 | error = xfs_free_eofblocks(mp, ip, |
578 | XFS_FREE_EOF_TRYLOCK); | |
579 | if (error) | |
580 | return error; | |
581 | ||
582 | /* delalloc blocks after truncation means it really is dirty */ | |
583 | if (ip->i_delayed_blks) | |
584 | xfs_iflags_set(ip, XFS_IDIRTY_RELEASE); | |
585 | } | |
1da177e4 LT |
586 | return 0; |
587 | } | |
588 | ||
589 | /* | |
590 | * xfs_inactive | |
591 | * | |
592 | * This is called when the vnode reference count for the vnode | |
593 | * goes to zero. If the file has been unlinked, then it must | |
594 | * now be truncated. Also, we clear all of the read-ahead state | |
595 | * kept for the inode here since the file is now closed. | |
596 | */ | |
993386c1 | 597 | int |
1da177e4 | 598 | xfs_inactive( |
993386c1 | 599 | xfs_inode_t *ip) |
1da177e4 | 600 | { |
67fcaa73 | 601 | xfs_bmap_free_t free_list; |
1da177e4 LT |
602 | xfs_fsblock_t first_block; |
603 | int committed; | |
604 | xfs_trans_t *tp; | |
605 | xfs_mount_t *mp; | |
606 | int error; | |
607 | int truncate; | |
608 | ||
1da177e4 LT |
609 | /* |
610 | * If the inode is already free, then there can be nothing | |
611 | * to clean up here. | |
612 | */ | |
cb4c8cc1 | 613 | if (ip->i_d.di_mode == 0 || is_bad_inode(VFS_I(ip))) { |
1da177e4 LT |
614 | ASSERT(ip->i_df.if_real_bytes == 0); |
615 | ASSERT(ip->i_df.if_broot_bytes == 0); | |
616 | return VN_INACTIVE_CACHE; | |
617 | } | |
618 | ||
619 | /* | |
620 | * Only do a truncate if it's a regular file with | |
621 | * some actual space in it. It's OK to look at the | |
622 | * inode's fields without the lock because we're the | |
623 | * only one with a reference to the inode. | |
624 | */ | |
625 | truncate = ((ip->i_d.di_nlink == 0) && | |
ce7ae151 | 626 | ((ip->i_d.di_size != 0) || XFS_ISIZE(ip) != 0 || |
ba87ea69 | 627 | (ip->i_d.di_nextents > 0) || (ip->i_delayed_blks > 0)) && |
abbede1b | 628 | S_ISREG(ip->i_d.di_mode)); |
1da177e4 LT |
629 | |
630 | mp = ip->i_mount; | |
631 | ||
1da177e4 LT |
632 | error = 0; |
633 | ||
634 | /* If this is a read-only mount, don't do this (would generate I/O) */ | |
bd186aa9 | 635 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
1da177e4 LT |
636 | goto out; |
637 | ||
638 | if (ip->i_d.di_nlink != 0) { | |
abbede1b | 639 | if ((S_ISREG(ip->i_d.di_mode) && |
ce7ae151 CH |
640 | (VFS_I(ip)->i_size > 0 || |
641 | (VN_CACHED(VFS_I(ip)) > 0 || ip->i_delayed_blks > 0)) && | |
642 | (ip->i_df.if_flags & XFS_IFEXTENTS) && | |
643 | (!(ip->i_d.di_flags & | |
dd9f438e | 644 | (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)) || |
ce7ae151 | 645 | ip->i_delayed_blks != 0))) { |
c56c9631 | 646 | error = xfs_free_eofblocks(mp, ip, 0); |
92dfe8d2 | 647 | if (error) |
014c2544 | 648 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
649 | } |
650 | goto out; | |
651 | } | |
652 | ||
653 | ASSERT(ip->i_d.di_nlink == 0); | |
654 | ||
7d095257 CH |
655 | error = xfs_qm_dqattach(ip, 0); |
656 | if (error) | |
014c2544 | 657 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
658 | |
659 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
660 | if (truncate) { | |
1da177e4 LT |
661 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
662 | ||
1da177e4 LT |
663 | error = xfs_trans_reserve(tp, 0, |
664 | XFS_ITRUNCATE_LOG_RES(mp), | |
665 | 0, XFS_TRANS_PERM_LOG_RES, | |
666 | XFS_ITRUNCATE_LOG_COUNT); | |
667 | if (error) { | |
668 | /* Don't call itruncate_cleanup */ | |
669 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
670 | xfs_trans_cancel(tp, 0); | |
671 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
014c2544 | 672 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
673 | } |
674 | ||
675 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
ddc3415a | 676 | xfs_trans_ijoin(tp, ip, 0); |
1da177e4 | 677 | |
673e8e59 | 678 | ip->i_d.di_size = 0; |
673e8e59 CH |
679 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
680 | ||
681 | error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, 0); | |
1da177e4 LT |
682 | if (error) { |
683 | xfs_trans_cancel(tp, | |
684 | XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
685 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
014c2544 | 686 | return VN_INACTIVE_CACHE; |
1da177e4 | 687 | } |
673e8e59 CH |
688 | |
689 | ASSERT(ip->i_d.di_nextents == 0); | |
abbede1b | 690 | } else if (S_ISLNK(ip->i_d.di_mode)) { |
1da177e4 LT |
691 | |
692 | /* | |
693 | * If we get an error while cleaning up a | |
694 | * symlink we bail out. | |
695 | */ | |
696 | error = (ip->i_d.di_size > XFS_IFORK_DSIZE(ip)) ? | |
697 | xfs_inactive_symlink_rmt(ip, &tp) : | |
698 | xfs_inactive_symlink_local(ip, &tp); | |
699 | ||
700 | if (error) { | |
701 | ASSERT(tp == NULL); | |
014c2544 | 702 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
703 | } |
704 | ||
ddc3415a | 705 | xfs_trans_ijoin(tp, ip, 0); |
1da177e4 LT |
706 | } else { |
707 | error = xfs_trans_reserve(tp, 0, | |
708 | XFS_IFREE_LOG_RES(mp), | |
709 | 0, XFS_TRANS_PERM_LOG_RES, | |
710 | XFS_INACTIVE_LOG_COUNT); | |
711 | if (error) { | |
712 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
713 | xfs_trans_cancel(tp, 0); | |
014c2544 | 714 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
715 | } |
716 | ||
717 | xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
ddc3415a | 718 | xfs_trans_ijoin(tp, ip, 0); |
1da177e4 LT |
719 | } |
720 | ||
721 | /* | |
722 | * If there are attributes associated with the file | |
723 | * then blow them away now. The code calls a routine | |
724 | * that recursively deconstructs the attribute fork. | |
725 | * We need to just commit the current transaction | |
726 | * because we can't use it for xfs_attr_inactive(). | |
727 | */ | |
728 | if (ip->i_d.di_anextents > 0) { | |
729 | error = xfs_inactive_attrs(ip, &tp); | |
730 | /* | |
731 | * If we got an error, the transaction is already | |
732 | * cancelled, and the inode is unlocked. Just get out. | |
733 | */ | |
734 | if (error) | |
014c2544 | 735 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
736 | } else if (ip->i_afp) { |
737 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); | |
738 | } | |
739 | ||
740 | /* | |
741 | * Free the inode. | |
742 | */ | |
9d87c319 | 743 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 LT |
744 | error = xfs_ifree(tp, ip, &free_list); |
745 | if (error) { | |
746 | /* | |
747 | * If we fail to free the inode, shut down. The cancel | |
748 | * might do that, we need to make sure. Otherwise the | |
749 | * inode might be lost for a long time or forever. | |
750 | */ | |
751 | if (!XFS_FORCED_SHUTDOWN(mp)) { | |
0b932ccc DC |
752 | xfs_notice(mp, "%s: xfs_ifree returned error %d", |
753 | __func__, error); | |
7d04a335 | 754 | xfs_force_shutdown(mp, SHUTDOWN_META_IO_ERROR); |
1da177e4 LT |
755 | } |
756 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); | |
757 | } else { | |
758 | /* | |
759 | * Credit the quota account(s). The inode is gone. | |
760 | */ | |
7d095257 | 761 | xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_ICOUNT, -1); |
1da177e4 LT |
762 | |
763 | /* | |
78e9da77 DC |
764 | * Just ignore errors at this point. There is nothing we can |
765 | * do except to try to keep going. Make sure it's not a silent | |
766 | * error. | |
1da177e4 | 767 | */ |
78e9da77 DC |
768 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
769 | if (error) | |
53487786 DC |
770 | xfs_notice(mp, "%s: xfs_bmap_finish returned error %d", |
771 | __func__, error); | |
78e9da77 DC |
772 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
773 | if (error) | |
53487786 DC |
774 | xfs_notice(mp, "%s: xfs_trans_commit returned error %d", |
775 | __func__, error); | |
1da177e4 | 776 | } |
7d095257 | 777 | |
1da177e4 LT |
778 | /* |
779 | * Release the dquots held by inode, if any. | |
780 | */ | |
7d095257 | 781 | xfs_qm_dqdetach(ip); |
1da177e4 LT |
782 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
783 | ||
784 | out: | |
785 | return VN_INACTIVE_CACHE; | |
786 | } | |
787 | ||
384f3ced BN |
788 | /* |
789 | * Lookups up an inode from "name". If ci_name is not NULL, then a CI match | |
790 | * is allowed, otherwise it has to be an exact match. If a CI match is found, | |
791 | * ci_name->name will point to a the actual name (caller must free) or | |
792 | * will be set to NULL if an exact match is found. | |
793 | */ | |
993386c1 | 794 | int |
1da177e4 | 795 | xfs_lookup( |
993386c1 | 796 | xfs_inode_t *dp, |
556b8b16 | 797 | struct xfs_name *name, |
384f3ced BN |
798 | xfs_inode_t **ipp, |
799 | struct xfs_name *ci_name) | |
1da177e4 | 800 | { |
eca450b7 | 801 | xfs_ino_t inum; |
1da177e4 LT |
802 | int error; |
803 | uint lock_mode; | |
1da177e4 | 804 | |
cca28fb8 | 805 | trace_xfs_lookup(dp, name); |
1da177e4 LT |
806 | |
807 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) | |
808 | return XFS_ERROR(EIO); | |
809 | ||
810 | lock_mode = xfs_ilock_map_shared(dp); | |
384f3ced | 811 | error = xfs_dir_lookup(NULL, dp, name, &inum, ci_name); |
1da177e4 | 812 | xfs_iunlock_map_shared(dp, lock_mode); |
eca450b7 CH |
813 | |
814 | if (error) | |
815 | goto out; | |
816 | ||
7b6259e7 | 817 | error = xfs_iget(dp->i_mount, NULL, inum, 0, 0, ipp); |
eca450b7 | 818 | if (error) |
384f3ced | 819 | goto out_free_name; |
eca450b7 | 820 | |
eca450b7 CH |
821 | return 0; |
822 | ||
384f3ced BN |
823 | out_free_name: |
824 | if (ci_name) | |
825 | kmem_free(ci_name->name); | |
826 | out: | |
eca450b7 | 827 | *ipp = NULL; |
1da177e4 LT |
828 | return error; |
829 | } | |
830 | ||
993386c1 | 831 | int |
1da177e4 | 832 | xfs_create( |
993386c1 | 833 | xfs_inode_t *dp, |
556b8b16 | 834 | struct xfs_name *name, |
576b1d67 | 835 | umode_t mode, |
3e5daf05 | 836 | xfs_dev_t rdev, |
6c77b0ea | 837 | xfs_inode_t **ipp) |
1da177e4 | 838 | { |
517b5e8c CH |
839 | int is_dir = S_ISDIR(mode); |
840 | struct xfs_mount *mp = dp->i_mount; | |
841 | struct xfs_inode *ip = NULL; | |
842 | struct xfs_trans *tp = NULL; | |
556b8b16 | 843 | int error; |
1da177e4 LT |
844 | xfs_bmap_free_t free_list; |
845 | xfs_fsblock_t first_block; | |
993386c1 | 846 | boolean_t unlock_dp_on_error = B_FALSE; |
1da177e4 LT |
847 | uint cancel_flags; |
848 | int committed; | |
6743099c | 849 | prid_t prid; |
517b5e8c CH |
850 | struct xfs_dquot *udqp = NULL; |
851 | struct xfs_dquot *gdqp = NULL; | |
1da177e4 | 852 | uint resblks; |
517b5e8c CH |
853 | uint log_res; |
854 | uint log_count; | |
1da177e4 | 855 | |
cca28fb8 | 856 | trace_xfs_create(dp, name); |
1da177e4 | 857 | |
517b5e8c CH |
858 | if (XFS_FORCED_SHUTDOWN(mp)) |
859 | return XFS_ERROR(EIO); | |
860 | ||
365ca83d | 861 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
6743099c | 862 | prid = xfs_get_projid(dp); |
1da177e4 | 863 | else |
6743099c | 864 | prid = XFS_PROJID_DEFAULT; |
1da177e4 LT |
865 | |
866 | /* | |
867 | * Make sure that we have allocated dquot(s) on disk. | |
868 | */ | |
7d095257 | 869 | error = xfs_qm_vop_dqalloc(dp, current_fsuid(), current_fsgid(), prid, |
517b5e8c | 870 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
1da177e4 | 871 | if (error) |
ec3ba85f | 872 | return error; |
1da177e4 | 873 | |
517b5e8c CH |
874 | if (is_dir) { |
875 | rdev = 0; | |
876 | resblks = XFS_MKDIR_SPACE_RES(mp, name->len); | |
877 | log_res = XFS_MKDIR_LOG_RES(mp); | |
878 | log_count = XFS_MKDIR_LOG_COUNT; | |
879 | tp = xfs_trans_alloc(mp, XFS_TRANS_MKDIR); | |
880 | } else { | |
881 | resblks = XFS_CREATE_SPACE_RES(mp, name->len); | |
882 | log_res = XFS_CREATE_LOG_RES(mp); | |
883 | log_count = XFS_CREATE_LOG_COUNT; | |
884 | tp = xfs_trans_alloc(mp, XFS_TRANS_CREATE); | |
885 | } | |
1da177e4 | 886 | |
1da177e4 | 887 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
517b5e8c | 888 | |
1da177e4 LT |
889 | /* |
890 | * Initially assume that the file does not exist and | |
891 | * reserve the resources for that case. If that is not | |
892 | * the case we'll drop the one we have and get a more | |
893 | * appropriate transaction later. | |
894 | */ | |
517b5e8c CH |
895 | error = xfs_trans_reserve(tp, resblks, log_res, 0, |
896 | XFS_TRANS_PERM_LOG_RES, log_count); | |
1da177e4 | 897 | if (error == ENOSPC) { |
153fec43 DC |
898 | /* flush outstanding delalloc blocks and retry */ |
899 | xfs_flush_inodes(dp); | |
4734d401 CH |
900 | error = xfs_trans_reserve(tp, resblks, log_res, 0, |
901 | XFS_TRANS_PERM_LOG_RES, log_count); | |
153fec43 DC |
902 | } |
903 | if (error == ENOSPC) { | |
904 | /* No space at all so try a "no-allocation" reservation */ | |
1da177e4 | 905 | resblks = 0; |
517b5e8c CH |
906 | error = xfs_trans_reserve(tp, 0, log_res, 0, |
907 | XFS_TRANS_PERM_LOG_RES, log_count); | |
1da177e4 LT |
908 | } |
909 | if (error) { | |
910 | cancel_flags = 0; | |
517b5e8c | 911 | goto out_trans_cancel; |
1da177e4 LT |
912 | } |
913 | ||
f7c66ce3 | 914 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
993386c1 | 915 | unlock_dp_on_error = B_TRUE; |
1da177e4 | 916 | |
517b5e8c | 917 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 LT |
918 | |
919 | /* | |
920 | * Reserve disk quota and the inode. | |
921 | */ | |
7d095257 | 922 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, resblks, 1, 0); |
1da177e4 | 923 | if (error) |
517b5e8c | 924 | goto out_trans_cancel; |
1da177e4 | 925 | |
556b8b16 BN |
926 | error = xfs_dir_canenter(tp, dp, name, resblks); |
927 | if (error) | |
517b5e8c CH |
928 | goto out_trans_cancel; |
929 | ||
930 | /* | |
931 | * A newly created regular or special file just has one directory | |
932 | * entry pointing to them, but a directory also the "." entry | |
933 | * pointing to itself. | |
934 | */ | |
6c77b0ea | 935 | error = xfs_dir_ialloc(&tp, dp, mode, is_dir ? 2 : 1, rdev, |
517b5e8c | 936 | prid, resblks > 0, &ip, &committed); |
1da177e4 LT |
937 | if (error) { |
938 | if (error == ENOSPC) | |
517b5e8c CH |
939 | goto out_trans_cancel; |
940 | goto out_trans_abort; | |
1da177e4 | 941 | } |
1da177e4 | 942 | |
1da177e4 | 943 | /* |
993386c1 CH |
944 | * Now we join the directory inode to the transaction. We do not do it |
945 | * earlier because xfs_dir_ialloc might commit the previous transaction | |
946 | * (and release all the locks). An error from here on will result in | |
947 | * the transaction cancel unlocking dp so don't do it explicitly in the | |
948 | * error path. | |
1da177e4 | 949 | */ |
ddc3415a | 950 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
993386c1 | 951 | unlock_dp_on_error = B_FALSE; |
1da177e4 | 952 | |
556b8b16 | 953 | error = xfs_dir_createname(tp, dp, name, ip->i_ino, |
f6c2d1fa NS |
954 | &first_block, &free_list, resblks ? |
955 | resblks - XFS_IALLOC_SPACE_RES(mp) : 0); | |
1da177e4 LT |
956 | if (error) { |
957 | ASSERT(error != ENOSPC); | |
517b5e8c | 958 | goto out_trans_abort; |
1da177e4 | 959 | } |
dcd79a14 | 960 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1da177e4 LT |
961 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); |
962 | ||
517b5e8c CH |
963 | if (is_dir) { |
964 | error = xfs_dir_init(tp, ip, dp); | |
965 | if (error) | |
966 | goto out_bmap_cancel; | |
967 | ||
968 | error = xfs_bumplink(tp, dp); | |
969 | if (error) | |
970 | goto out_bmap_cancel; | |
971 | } | |
972 | ||
1da177e4 LT |
973 | /* |
974 | * If this is a synchronous mount, make sure that the | |
975 | * create transaction goes to disk before returning to | |
976 | * the user. | |
977 | */ | |
517b5e8c | 978 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) |
1da177e4 | 979 | xfs_trans_set_sync(tp); |
1da177e4 | 980 | |
1da177e4 LT |
981 | /* |
982 | * Attach the dquot(s) to the inodes and modify them incore. | |
983 | * These ids of the inode couldn't have changed since the new | |
984 | * inode has been locked ever since it was created. | |
985 | */ | |
7d095257 | 986 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp); |
1da177e4 | 987 | |
f7c99b6f | 988 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
517b5e8c | 989 | if (error) |
ec3ba85f | 990 | goto out_bmap_cancel; |
1da177e4 | 991 | |
1c72bf90 | 992 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
ec3ba85f CH |
993 | if (error) |
994 | goto out_release_inode; | |
1da177e4 | 995 | |
7d095257 CH |
996 | xfs_qm_dqrele(udqp); |
997 | xfs_qm_dqrele(gdqp); | |
1da177e4 | 998 | |
979ebab1 | 999 | *ipp = ip; |
288699fe | 1000 | return 0; |
1da177e4 | 1001 | |
517b5e8c CH |
1002 | out_bmap_cancel: |
1003 | xfs_bmap_cancel(&free_list); | |
1004 | out_trans_abort: | |
1da177e4 | 1005 | cancel_flags |= XFS_TRANS_ABORT; |
517b5e8c CH |
1006 | out_trans_cancel: |
1007 | xfs_trans_cancel(tp, cancel_flags); | |
ec3ba85f CH |
1008 | out_release_inode: |
1009 | /* | |
1010 | * Wait until after the current transaction is aborted to | |
1011 | * release the inode. This prevents recursive transactions | |
1012 | * and deadlocks from xfs_inactive. | |
1013 | */ | |
1014 | if (ip) | |
1015 | IRELE(ip); | |
1016 | ||
7d095257 CH |
1017 | xfs_qm_dqrele(udqp); |
1018 | xfs_qm_dqrele(gdqp); | |
1da177e4 | 1019 | |
993386c1 CH |
1020 | if (unlock_dp_on_error) |
1021 | xfs_iunlock(dp, XFS_ILOCK_EXCL); | |
288699fe | 1022 | return error; |
1da177e4 LT |
1023 | } |
1024 | ||
1da177e4 LT |
1025 | #ifdef DEBUG |
1026 | int xfs_locked_n; | |
1027 | int xfs_small_retries; | |
1028 | int xfs_middle_retries; | |
1029 | int xfs_lots_retries; | |
1030 | int xfs_lock_delays; | |
1031 | #endif | |
1032 | ||
f7c66ce3 LM |
1033 | /* |
1034 | * Bump the subclass so xfs_lock_inodes() acquires each lock with | |
1035 | * a different value | |
1036 | */ | |
1037 | static inline int | |
1038 | xfs_lock_inumorder(int lock_mode, int subclass) | |
1039 | { | |
1040 | if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) | |
0f1145cc | 1041 | lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_IOLOCK_SHIFT; |
f7c66ce3 | 1042 | if (lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) |
0f1145cc | 1043 | lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_ILOCK_SHIFT; |
f7c66ce3 LM |
1044 | |
1045 | return lock_mode; | |
1046 | } | |
1047 | ||
1da177e4 LT |
1048 | /* |
1049 | * The following routine will lock n inodes in exclusive mode. | |
1050 | * We assume the caller calls us with the inodes in i_ino order. | |
1051 | * | |
1052 | * We need to detect deadlock where an inode that we lock | |
1053 | * is in the AIL and we start waiting for another inode that is locked | |
1054 | * by a thread in a long running transaction (such as truncate). This can | |
1055 | * result in deadlock since the long running trans might need to wait | |
1056 | * for the inode we just locked in order to push the tail and free space | |
1057 | * in the log. | |
1058 | */ | |
1059 | void | |
1060 | xfs_lock_inodes( | |
1061 | xfs_inode_t **ips, | |
1062 | int inodes, | |
1da177e4 LT |
1063 | uint lock_mode) |
1064 | { | |
1065 | int attempts = 0, i, j, try_lock; | |
1066 | xfs_log_item_t *lp; | |
1067 | ||
1068 | ASSERT(ips && (inodes >= 2)); /* we need at least two */ | |
1069 | ||
cfa853e4 CH |
1070 | try_lock = 0; |
1071 | i = 0; | |
1da177e4 LT |
1072 | |
1073 | again: | |
1074 | for (; i < inodes; i++) { | |
1075 | ASSERT(ips[i]); | |
1076 | ||
1077 | if (i && (ips[i] == ips[i-1])) /* Already locked */ | |
1078 | continue; | |
1079 | ||
1080 | /* | |
1081 | * If try_lock is not set yet, make sure all locked inodes | |
1082 | * are not in the AIL. | |
1083 | * If any are, set try_lock to be used later. | |
1084 | */ | |
1085 | ||
1086 | if (!try_lock) { | |
1087 | for (j = (i - 1); j >= 0 && !try_lock; j--) { | |
1088 | lp = (xfs_log_item_t *)ips[j]->i_itemp; | |
1089 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { | |
1090 | try_lock++; | |
1091 | } | |
1092 | } | |
1093 | } | |
1094 | ||
1095 | /* | |
1096 | * If any of the previous locks we have locked is in the AIL, | |
1097 | * we must TRY to get the second and subsequent locks. If | |
1098 | * we can't get any, we must release all we have | |
1099 | * and try again. | |
1100 | */ | |
1101 | ||
1102 | if (try_lock) { | |
1103 | /* try_lock must be 0 if i is 0. */ | |
1104 | /* | |
1105 | * try_lock means we have an inode locked | |
1106 | * that is in the AIL. | |
1107 | */ | |
1108 | ASSERT(i != 0); | |
f7c66ce3 | 1109 | if (!xfs_ilock_nowait(ips[i], xfs_lock_inumorder(lock_mode, i))) { |
1da177e4 LT |
1110 | attempts++; |
1111 | ||
1112 | /* | |
1113 | * Unlock all previous guys and try again. | |
1114 | * xfs_iunlock will try to push the tail | |
1115 | * if the inode is in the AIL. | |
1116 | */ | |
1117 | ||
1118 | for(j = i - 1; j >= 0; j--) { | |
1119 | ||
1120 | /* | |
1121 | * Check to see if we've already | |
1122 | * unlocked this one. | |
1123 | * Not the first one going back, | |
1124 | * and the inode ptr is the same. | |
1125 | */ | |
1126 | if ((j != (i - 1)) && ips[j] == | |
1127 | ips[j+1]) | |
1128 | continue; | |
1129 | ||
1130 | xfs_iunlock(ips[j], lock_mode); | |
1131 | } | |
1132 | ||
1133 | if ((attempts % 5) == 0) { | |
1134 | delay(1); /* Don't just spin the CPU */ | |
1135 | #ifdef DEBUG | |
1136 | xfs_lock_delays++; | |
1137 | #endif | |
1138 | } | |
1139 | i = 0; | |
1140 | try_lock = 0; | |
1141 | goto again; | |
1142 | } | |
1143 | } else { | |
f7c66ce3 | 1144 | xfs_ilock(ips[i], xfs_lock_inumorder(lock_mode, i)); |
1da177e4 LT |
1145 | } |
1146 | } | |
1147 | ||
1148 | #ifdef DEBUG | |
1149 | if (attempts) { | |
1150 | if (attempts < 5) xfs_small_retries++; | |
1151 | else if (attempts < 100) xfs_middle_retries++; | |
1152 | else xfs_lots_retries++; | |
1153 | } else { | |
1154 | xfs_locked_n++; | |
1155 | } | |
1156 | #endif | |
1157 | } | |
1158 | ||
f9114eba DC |
1159 | /* |
1160 | * xfs_lock_two_inodes() can only be used to lock one type of lock | |
1161 | * at a time - the iolock or the ilock, but not both at once. If | |
1162 | * we lock both at once, lockdep will report false positives saying | |
1163 | * we have violated locking orders. | |
1164 | */ | |
e1cccd91 CH |
1165 | void |
1166 | xfs_lock_two_inodes( | |
1167 | xfs_inode_t *ip0, | |
1168 | xfs_inode_t *ip1, | |
1169 | uint lock_mode) | |
1170 | { | |
1171 | xfs_inode_t *temp; | |
1172 | int attempts = 0; | |
1173 | xfs_log_item_t *lp; | |
1174 | ||
f9114eba DC |
1175 | if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) |
1176 | ASSERT((lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) == 0); | |
e1cccd91 CH |
1177 | ASSERT(ip0->i_ino != ip1->i_ino); |
1178 | ||
1179 | if (ip0->i_ino > ip1->i_ino) { | |
1180 | temp = ip0; | |
1181 | ip0 = ip1; | |
1182 | ip1 = temp; | |
1183 | } | |
1184 | ||
1185 | again: | |
1186 | xfs_ilock(ip0, xfs_lock_inumorder(lock_mode, 0)); | |
1187 | ||
1188 | /* | |
1189 | * If the first lock we have locked is in the AIL, we must TRY to get | |
1190 | * the second lock. If we can't get it, we must release the first one | |
1191 | * and try again. | |
1192 | */ | |
1193 | lp = (xfs_log_item_t *)ip0->i_itemp; | |
1194 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { | |
1195 | if (!xfs_ilock_nowait(ip1, xfs_lock_inumorder(lock_mode, 1))) { | |
1196 | xfs_iunlock(ip0, lock_mode); | |
1197 | if ((++attempts % 5) == 0) | |
1198 | delay(1); /* Don't just spin the CPU */ | |
1199 | goto again; | |
1200 | } | |
1201 | } else { | |
1202 | xfs_ilock(ip1, xfs_lock_inumorder(lock_mode, 1)); | |
1203 | } | |
1204 | } | |
1205 | ||
993386c1 | 1206 | int |
1da177e4 | 1207 | xfs_remove( |
993386c1 | 1208 | xfs_inode_t *dp, |
556b8b16 BN |
1209 | struct xfs_name *name, |
1210 | xfs_inode_t *ip) | |
1da177e4 | 1211 | { |
993386c1 | 1212 | xfs_mount_t *mp = dp->i_mount; |
1da177e4 | 1213 | xfs_trans_t *tp = NULL; |
8f112e3b | 1214 | int is_dir = S_ISDIR(ip->i_d.di_mode); |
1da177e4 LT |
1215 | int error = 0; |
1216 | xfs_bmap_free_t free_list; | |
1217 | xfs_fsblock_t first_block; | |
1218 | int cancel_flags; | |
1219 | int committed; | |
1da177e4 LT |
1220 | int link_zero; |
1221 | uint resblks; | |
8f112e3b | 1222 | uint log_count; |
1da177e4 | 1223 | |
cca28fb8 | 1224 | trace_xfs_remove(dp, name); |
1da177e4 | 1225 | |
1da177e4 LT |
1226 | if (XFS_FORCED_SHUTDOWN(mp)) |
1227 | return XFS_ERROR(EIO); | |
1228 | ||
7d095257 | 1229 | error = xfs_qm_dqattach(dp, 0); |
8f112e3b CH |
1230 | if (error) |
1231 | goto std_return; | |
1232 | ||
7d095257 | 1233 | error = xfs_qm_dqattach(ip, 0); |
8f112e3b | 1234 | if (error) |
1da177e4 | 1235 | goto std_return; |
1da177e4 | 1236 | |
8f112e3b CH |
1237 | if (is_dir) { |
1238 | tp = xfs_trans_alloc(mp, XFS_TRANS_RMDIR); | |
1239 | log_count = XFS_DEFAULT_LOG_COUNT; | |
1240 | } else { | |
1241 | tp = xfs_trans_alloc(mp, XFS_TRANS_REMOVE); | |
1242 | log_count = XFS_REMOVE_LOG_COUNT; | |
1243 | } | |
1da177e4 | 1244 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
8f112e3b | 1245 | |
1da177e4 LT |
1246 | /* |
1247 | * We try to get the real space reservation first, | |
1248 | * allowing for directory btree deletion(s) implying | |
1249 | * possible bmap insert(s). If we can't get the space | |
1250 | * reservation then we use 0 instead, and avoid the bmap | |
1251 | * btree insert(s) in the directory code by, if the bmap | |
1252 | * insert tries to happen, instead trimming the LAST | |
1253 | * block from the directory. | |
1254 | */ | |
1255 | resblks = XFS_REMOVE_SPACE_RES(mp); | |
1256 | error = xfs_trans_reserve(tp, resblks, XFS_REMOVE_LOG_RES(mp), 0, | |
8f112e3b | 1257 | XFS_TRANS_PERM_LOG_RES, log_count); |
1da177e4 LT |
1258 | if (error == ENOSPC) { |
1259 | resblks = 0; | |
1260 | error = xfs_trans_reserve(tp, 0, XFS_REMOVE_LOG_RES(mp), 0, | |
8f112e3b | 1261 | XFS_TRANS_PERM_LOG_RES, log_count); |
1da177e4 LT |
1262 | } |
1263 | if (error) { | |
1264 | ASSERT(error != ENOSPC); | |
8f112e3b CH |
1265 | cancel_flags = 0; |
1266 | goto out_trans_cancel; | |
1da177e4 LT |
1267 | } |
1268 | ||
e1cccd91 | 1269 | xfs_lock_two_inodes(dp, ip, XFS_ILOCK_EXCL); |
1da177e4 | 1270 | |
ddc3415a CH |
1271 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
1272 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
1da177e4 | 1273 | |
8f112e3b CH |
1274 | /* |
1275 | * If we're removing a directory perform some additional validation. | |
1276 | */ | |
1277 | if (is_dir) { | |
1278 | ASSERT(ip->i_d.di_nlink >= 2); | |
1279 | if (ip->i_d.di_nlink != 2) { | |
1280 | error = XFS_ERROR(ENOTEMPTY); | |
1281 | goto out_trans_cancel; | |
1282 | } | |
1283 | if (!xfs_dir_isempty(ip)) { | |
1284 | error = XFS_ERROR(ENOTEMPTY); | |
1285 | goto out_trans_cancel; | |
1286 | } | |
1287 | } | |
1288 | ||
9d87c319 | 1289 | xfs_bmap_init(&free_list, &first_block); |
556b8b16 | 1290 | error = xfs_dir_removename(tp, dp, name, ip->i_ino, |
d4377d84 | 1291 | &first_block, &free_list, resblks); |
1da177e4 LT |
1292 | if (error) { |
1293 | ASSERT(error != ENOENT); | |
8f112e3b | 1294 | goto out_bmap_cancel; |
1da177e4 | 1295 | } |
dcd79a14 | 1296 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1da177e4 | 1297 | |
8f112e3b CH |
1298 | if (is_dir) { |
1299 | /* | |
1300 | * Drop the link from ip's "..". | |
1301 | */ | |
1302 | error = xfs_droplink(tp, dp); | |
1303 | if (error) | |
1304 | goto out_bmap_cancel; | |
1305 | ||
1306 | /* | |
2b7035fd | 1307 | * Drop the "." link from ip to self. |
8f112e3b CH |
1308 | */ |
1309 | error = xfs_droplink(tp, ip); | |
1310 | if (error) | |
1311 | goto out_bmap_cancel; | |
1312 | } else { | |
1313 | /* | |
1314 | * When removing a non-directory we need to log the parent | |
26c52951 DC |
1315 | * inode here. For a directory this is done implicitly |
1316 | * by the xfs_droplink call for the ".." entry. | |
8f112e3b CH |
1317 | */ |
1318 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
1da177e4 LT |
1319 | } |
1320 | ||
8f112e3b | 1321 | /* |
2b7035fd | 1322 | * Drop the link from dp to ip. |
8f112e3b CH |
1323 | */ |
1324 | error = xfs_droplink(tp, ip); | |
1325 | if (error) | |
1326 | goto out_bmap_cancel; | |
1327 | ||
1328 | /* | |
1329 | * Determine if this is the last link while | |
1da177e4 LT |
1330 | * we are in the transaction. |
1331 | */ | |
8f112e3b | 1332 | link_zero = (ip->i_d.di_nlink == 0); |
1da177e4 | 1333 | |
1da177e4 LT |
1334 | /* |
1335 | * If this is a synchronous mount, make sure that the | |
1336 | * remove transaction goes to disk before returning to | |
1337 | * the user. | |
1338 | */ | |
8f112e3b | 1339 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) |
1da177e4 | 1340 | xfs_trans_set_sync(tp); |
1da177e4 | 1341 | |
f7c99b6f | 1342 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
8f112e3b CH |
1343 | if (error) |
1344 | goto out_bmap_cancel; | |
1da177e4 | 1345 | |
1c72bf90 | 1346 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
5df78e73 | 1347 | if (error) |
1da177e4 | 1348 | goto std_return; |
1da177e4 | 1349 | |
2a82b8be DC |
1350 | /* |
1351 | * If we are using filestreams, kill the stream association. | |
1352 | * If the file is still open it may get a new one but that | |
1353 | * will get killed on last close in xfs_close() so we don't | |
1354 | * have to worry about that. | |
1355 | */ | |
8f112e3b | 1356 | if (!is_dir && link_zero && xfs_inode_is_filestream(ip)) |
2a82b8be DC |
1357 | xfs_filestream_deassociate(ip); |
1358 | ||
288699fe | 1359 | return 0; |
1da177e4 | 1360 | |
8f112e3b | 1361 | out_bmap_cancel: |
1da177e4 LT |
1362 | xfs_bmap_cancel(&free_list); |
1363 | cancel_flags |= XFS_TRANS_ABORT; | |
8f112e3b | 1364 | out_trans_cancel: |
1da177e4 | 1365 | xfs_trans_cancel(tp, cancel_flags); |
288699fe CH |
1366 | std_return: |
1367 | return error; | |
1da177e4 LT |
1368 | } |
1369 | ||
993386c1 | 1370 | int |
1da177e4 | 1371 | xfs_link( |
993386c1 | 1372 | xfs_inode_t *tdp, |
a3da7896 | 1373 | xfs_inode_t *sip, |
556b8b16 | 1374 | struct xfs_name *target_name) |
1da177e4 | 1375 | { |
993386c1 | 1376 | xfs_mount_t *mp = tdp->i_mount; |
1da177e4 | 1377 | xfs_trans_t *tp; |
1da177e4 LT |
1378 | int error; |
1379 | xfs_bmap_free_t free_list; | |
1380 | xfs_fsblock_t first_block; | |
1381 | int cancel_flags; | |
1382 | int committed; | |
1da177e4 | 1383 | int resblks; |
1da177e4 | 1384 | |
cca28fb8 | 1385 | trace_xfs_link(tdp, target_name); |
1da177e4 | 1386 | |
a3da7896 | 1387 | ASSERT(!S_ISDIR(sip->i_d.di_mode)); |
1da177e4 | 1388 | |
1da177e4 LT |
1389 | if (XFS_FORCED_SHUTDOWN(mp)) |
1390 | return XFS_ERROR(EIO); | |
1391 | ||
7d095257 | 1392 | error = xfs_qm_dqattach(sip, 0); |
cb3f35bb CH |
1393 | if (error) |
1394 | goto std_return; | |
1395 | ||
7d095257 | 1396 | error = xfs_qm_dqattach(tdp, 0); |
1da177e4 LT |
1397 | if (error) |
1398 | goto std_return; | |
1399 | ||
1400 | tp = xfs_trans_alloc(mp, XFS_TRANS_LINK); | |
1401 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
556b8b16 | 1402 | resblks = XFS_LINK_SPACE_RES(mp, target_name->len); |
1da177e4 LT |
1403 | error = xfs_trans_reserve(tp, resblks, XFS_LINK_LOG_RES(mp), 0, |
1404 | XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); | |
1405 | if (error == ENOSPC) { | |
1406 | resblks = 0; | |
1407 | error = xfs_trans_reserve(tp, 0, XFS_LINK_LOG_RES(mp), 0, | |
1408 | XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); | |
1409 | } | |
1410 | if (error) { | |
1411 | cancel_flags = 0; | |
1412 | goto error_return; | |
1413 | } | |
1414 | ||
e1cccd91 | 1415 | xfs_lock_two_inodes(sip, tdp, XFS_ILOCK_EXCL); |
1da177e4 | 1416 | |
ddc3415a CH |
1417 | xfs_trans_ijoin(tp, sip, XFS_ILOCK_EXCL); |
1418 | xfs_trans_ijoin(tp, tdp, XFS_ILOCK_EXCL); | |
1da177e4 | 1419 | |
365ca83d NS |
1420 | /* |
1421 | * If we are using project inheritance, we only allow hard link | |
1422 | * creation in our tree when the project IDs are the same; else | |
1423 | * the tree quota mechanism could be circumvented. | |
1424 | */ | |
1425 | if (unlikely((tdp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && | |
6743099c | 1426 | (xfs_get_projid(tdp) != xfs_get_projid(sip)))) { |
b1ecdda9 | 1427 | error = XFS_ERROR(EXDEV); |
365ca83d NS |
1428 | goto error_return; |
1429 | } | |
1430 | ||
556b8b16 BN |
1431 | error = xfs_dir_canenter(tp, tdp, target_name, resblks); |
1432 | if (error) | |
1da177e4 LT |
1433 | goto error_return; |
1434 | ||
9d87c319 | 1435 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 | 1436 | |
556b8b16 BN |
1437 | error = xfs_dir_createname(tp, tdp, target_name, sip->i_ino, |
1438 | &first_block, &free_list, resblks); | |
1da177e4 LT |
1439 | if (error) |
1440 | goto abort_return; | |
dcd79a14 | 1441 | xfs_trans_ichgtime(tp, tdp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1da177e4 LT |
1442 | xfs_trans_log_inode(tp, tdp, XFS_ILOG_CORE); |
1443 | ||
1444 | error = xfs_bumplink(tp, sip); | |
b71d300c | 1445 | if (error) |
1da177e4 | 1446 | goto abort_return; |
1da177e4 LT |
1447 | |
1448 | /* | |
1449 | * If this is a synchronous mount, make sure that the | |
1450 | * link transaction goes to disk before returning to | |
1451 | * the user. | |
1452 | */ | |
1453 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
1454 | xfs_trans_set_sync(tp); | |
1455 | } | |
1456 | ||
f7c99b6f | 1457 | error = xfs_bmap_finish (&tp, &free_list, &committed); |
1da177e4 LT |
1458 | if (error) { |
1459 | xfs_bmap_cancel(&free_list); | |
1460 | goto abort_return; | |
1461 | } | |
1462 | ||
288699fe | 1463 | return xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
1464 | |
1465 | abort_return: | |
1466 | cancel_flags |= XFS_TRANS_ABORT; | |
1da177e4 LT |
1467 | error_return: |
1468 | xfs_trans_cancel(tp, cancel_flags); | |
288699fe CH |
1469 | std_return: |
1470 | return error; | |
1da177e4 | 1471 | } |
b71d300c | 1472 | |
993386c1 | 1473 | int |
1da177e4 | 1474 | xfs_symlink( |
993386c1 | 1475 | xfs_inode_t *dp, |
556b8b16 BN |
1476 | struct xfs_name *link_name, |
1477 | const char *target_path, | |
576b1d67 | 1478 | umode_t mode, |
6c77b0ea | 1479 | xfs_inode_t **ipp) |
1da177e4 | 1480 | { |
993386c1 | 1481 | xfs_mount_t *mp = dp->i_mount; |
1da177e4 | 1482 | xfs_trans_t *tp; |
1da177e4 LT |
1483 | xfs_inode_t *ip; |
1484 | int error; | |
1485 | int pathlen; | |
1486 | xfs_bmap_free_t free_list; | |
1487 | xfs_fsblock_t first_block; | |
993386c1 | 1488 | boolean_t unlock_dp_on_error = B_FALSE; |
1da177e4 LT |
1489 | uint cancel_flags; |
1490 | int committed; | |
1491 | xfs_fileoff_t first_fsb; | |
1492 | xfs_filblks_t fs_blocks; | |
1493 | int nmaps; | |
1494 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; | |
1495 | xfs_daddr_t d; | |
556b8b16 | 1496 | const char *cur_chunk; |
1da177e4 LT |
1497 | int byte_cnt; |
1498 | int n; | |
1499 | xfs_buf_t *bp; | |
6743099c | 1500 | prid_t prid; |
1da177e4 LT |
1501 | struct xfs_dquot *udqp, *gdqp; |
1502 | uint resblks; | |
1da177e4 | 1503 | |
3937be5b | 1504 | *ipp = NULL; |
1da177e4 LT |
1505 | error = 0; |
1506 | ip = NULL; | |
1507 | tp = NULL; | |
1508 | ||
cca28fb8 | 1509 | trace_xfs_symlink(dp, link_name); |
1da177e4 LT |
1510 | |
1511 | if (XFS_FORCED_SHUTDOWN(mp)) | |
1512 | return XFS_ERROR(EIO); | |
1513 | ||
1da177e4 LT |
1514 | /* |
1515 | * Check component lengths of the target path name. | |
1516 | */ | |
1517 | pathlen = strlen(target_path); | |
1518 | if (pathlen >= MAXPATHLEN) /* total string too long */ | |
1519 | return XFS_ERROR(ENAMETOOLONG); | |
1da177e4 | 1520 | |
1da177e4 | 1521 | udqp = gdqp = NULL; |
365ca83d | 1522 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
6743099c | 1523 | prid = xfs_get_projid(dp); |
1da177e4 | 1524 | else |
6743099c | 1525 | prid = XFS_PROJID_DEFAULT; |
1da177e4 LT |
1526 | |
1527 | /* | |
1528 | * Make sure that we have allocated dquot(s) on disk. | |
1529 | */ | |
7d095257 | 1530 | error = xfs_qm_vop_dqalloc(dp, current_fsuid(), current_fsgid(), prid, |
1da177e4 LT |
1531 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
1532 | if (error) | |
1533 | goto std_return; | |
1534 | ||
1535 | tp = xfs_trans_alloc(mp, XFS_TRANS_SYMLINK); | |
1536 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
1537 | /* | |
1538 | * The symlink will fit into the inode data fork? | |
1539 | * There can't be any attributes so we get the whole variable part. | |
1540 | */ | |
1541 | if (pathlen <= XFS_LITINO(mp)) | |
1542 | fs_blocks = 0; | |
1543 | else | |
1544 | fs_blocks = XFS_B_TO_FSB(mp, pathlen); | |
556b8b16 | 1545 | resblks = XFS_SYMLINK_SPACE_RES(mp, link_name->len, fs_blocks); |
1da177e4 LT |
1546 | error = xfs_trans_reserve(tp, resblks, XFS_SYMLINK_LOG_RES(mp), 0, |
1547 | XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT); | |
1548 | if (error == ENOSPC && fs_blocks == 0) { | |
1549 | resblks = 0; | |
1550 | error = xfs_trans_reserve(tp, 0, XFS_SYMLINK_LOG_RES(mp), 0, | |
1551 | XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT); | |
1552 | } | |
1553 | if (error) { | |
1554 | cancel_flags = 0; | |
1da177e4 LT |
1555 | goto error_return; |
1556 | } | |
1557 | ||
f7c66ce3 | 1558 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
993386c1 | 1559 | unlock_dp_on_error = B_TRUE; |
1da177e4 LT |
1560 | |
1561 | /* | |
1562 | * Check whether the directory allows new symlinks or not. | |
1563 | */ | |
1564 | if (dp->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) { | |
1565 | error = XFS_ERROR(EPERM); | |
1566 | goto error_return; | |
1567 | } | |
1568 | ||
1569 | /* | |
1570 | * Reserve disk quota : blocks and inode. | |
1571 | */ | |
7d095257 | 1572 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, resblks, 1, 0); |
1da177e4 LT |
1573 | if (error) |
1574 | goto error_return; | |
1575 | ||
1576 | /* | |
1577 | * Check for ability to enter directory entry, if no space reserved. | |
1578 | */ | |
556b8b16 BN |
1579 | error = xfs_dir_canenter(tp, dp, link_name, resblks); |
1580 | if (error) | |
1da177e4 LT |
1581 | goto error_return; |
1582 | /* | |
1583 | * Initialize the bmap freelist prior to calling either | |
1584 | * bmapi or the directory create code. | |
1585 | */ | |
9d87c319 | 1586 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 LT |
1587 | |
1588 | /* | |
1589 | * Allocate an inode for the symlink. | |
1590 | */ | |
6c77b0ea CH |
1591 | error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (mode & ~S_IFMT), 1, 0, |
1592 | prid, resblks > 0, &ip, NULL); | |
1da177e4 LT |
1593 | if (error) { |
1594 | if (error == ENOSPC) | |
1595 | goto error_return; | |
1596 | goto error1; | |
1597 | } | |
1da177e4 | 1598 | |
993386c1 CH |
1599 | /* |
1600 | * An error after we've joined dp to the transaction will result in the | |
1601 | * transaction cancel unlocking dp so don't do it explicitly in the | |
1602 | * error path. | |
1603 | */ | |
ddc3415a | 1604 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
993386c1 | 1605 | unlock_dp_on_error = B_FALSE; |
1da177e4 LT |
1606 | |
1607 | /* | |
1608 | * Also attach the dquot(s) to it, if applicable. | |
1609 | */ | |
7d095257 | 1610 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp); |
1da177e4 LT |
1611 | |
1612 | if (resblks) | |
1613 | resblks -= XFS_IALLOC_SPACE_RES(mp); | |
1614 | /* | |
1615 | * If the symlink will fit into the inode, write it inline. | |
1616 | */ | |
1617 | if (pathlen <= XFS_IFORK_DSIZE(ip)) { | |
1618 | xfs_idata_realloc(ip, pathlen, XFS_DATA_FORK); | |
1619 | memcpy(ip->i_df.if_u1.if_data, target_path, pathlen); | |
1620 | ip->i_d.di_size = pathlen; | |
1621 | ||
1622 | /* | |
1623 | * The inode was initially created in extent format. | |
1624 | */ | |
1625 | ip->i_df.if_flags &= ~(XFS_IFEXTENTS | XFS_IFBROOT); | |
1626 | ip->i_df.if_flags |= XFS_IFINLINE; | |
1627 | ||
1628 | ip->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
1629 | xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE); | |
1630 | ||
1631 | } else { | |
1632 | first_fsb = 0; | |
1633 | nmaps = SYMLINK_MAPS; | |
1634 | ||
c0dc7828 DC |
1635 | error = xfs_bmapi_write(tp, ip, first_fsb, fs_blocks, |
1636 | XFS_BMAPI_METADATA, &first_block, resblks, | |
1637 | mval, &nmaps, &free_list); | |
ec3ba85f CH |
1638 | if (error) |
1639 | goto error2; | |
1da177e4 LT |
1640 | |
1641 | if (resblks) | |
1642 | resblks -= fs_blocks; | |
1643 | ip->i_d.di_size = pathlen; | |
1644 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
1645 | ||
1646 | cur_chunk = target_path; | |
1647 | for (n = 0; n < nmaps; n++) { | |
1648 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); | |
1649 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
1650 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, | |
1651 | BTOBB(byte_cnt), 0); | |
2a30f36d CS |
1652 | if (!bp) { |
1653 | error = ENOMEM; | |
1654 | goto error2; | |
1655 | } | |
1da177e4 LT |
1656 | if (pathlen < byte_cnt) { |
1657 | byte_cnt = pathlen; | |
1658 | } | |
1659 | pathlen -= byte_cnt; | |
1660 | ||
62926044 | 1661 | memcpy(bp->b_addr, cur_chunk, byte_cnt); |
1da177e4 LT |
1662 | cur_chunk += byte_cnt; |
1663 | ||
1664 | xfs_trans_log_buf(tp, bp, 0, byte_cnt - 1); | |
1665 | } | |
1666 | } | |
1667 | ||
1668 | /* | |
1669 | * Create the directory entry for the symlink. | |
1670 | */ | |
556b8b16 BN |
1671 | error = xfs_dir_createname(tp, dp, link_name, ip->i_ino, |
1672 | &first_block, &free_list, resblks); | |
f6c2d1fa | 1673 | if (error) |
ec3ba85f | 1674 | goto error2; |
dcd79a14 | 1675 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1da177e4 LT |
1676 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); |
1677 | ||
1da177e4 LT |
1678 | /* |
1679 | * If this is a synchronous mount, make sure that the | |
1680 | * symlink transaction goes to disk before returning to | |
1681 | * the user. | |
1682 | */ | |
1683 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
1684 | xfs_trans_set_sync(tp); | |
1685 | } | |
1686 | ||
f7c99b6f | 1687 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
1688 | if (error) { |
1689 | goto error2; | |
1690 | } | |
1c72bf90 | 1691 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
7d095257 CH |
1692 | xfs_qm_dqrele(udqp); |
1693 | xfs_qm_dqrele(gdqp); | |
1da177e4 | 1694 | |
288699fe CH |
1695 | *ipp = ip; |
1696 | return 0; | |
1da177e4 LT |
1697 | |
1698 | error2: | |
1699 | IRELE(ip); | |
1700 | error1: | |
1701 | xfs_bmap_cancel(&free_list); | |
1702 | cancel_flags |= XFS_TRANS_ABORT; | |
1703 | error_return: | |
1704 | xfs_trans_cancel(tp, cancel_flags); | |
7d095257 CH |
1705 | xfs_qm_dqrele(udqp); |
1706 | xfs_qm_dqrele(gdqp); | |
1da177e4 | 1707 | |
993386c1 | 1708 | if (unlock_dp_on_error) |
1da177e4 | 1709 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
288699fe CH |
1710 | std_return: |
1711 | return error; | |
1da177e4 LT |
1712 | } |
1713 | ||
1da177e4 | 1714 | int |
993386c1 CH |
1715 | xfs_set_dmattrs( |
1716 | xfs_inode_t *ip, | |
1da177e4 | 1717 | u_int evmask, |
993386c1 | 1718 | u_int16_t state) |
1da177e4 | 1719 | { |
993386c1 | 1720 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 | 1721 | xfs_trans_t *tp; |
1da177e4 LT |
1722 | int error; |
1723 | ||
1724 | if (!capable(CAP_SYS_ADMIN)) | |
1725 | return XFS_ERROR(EPERM); | |
1726 | ||
1da177e4 LT |
1727 | if (XFS_FORCED_SHUTDOWN(mp)) |
1728 | return XFS_ERROR(EIO); | |
1729 | ||
1730 | tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS); | |
1731 | error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES (mp), 0, 0, 0); | |
1732 | if (error) { | |
1733 | xfs_trans_cancel(tp, 0); | |
1734 | return error; | |
1735 | } | |
1736 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
ddc3415a | 1737 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
1da177e4 | 1738 | |
613d7043 CH |
1739 | ip->i_d.di_dmevmask = evmask; |
1740 | ip->i_d.di_dmstate = state; | |
1da177e4 LT |
1741 | |
1742 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
1c72bf90 | 1743 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
1744 | |
1745 | return error; | |
1746 | } | |
1747 | ||
1da177e4 LT |
1748 | /* |
1749 | * xfs_alloc_file_space() | |
1750 | * This routine allocates disk space for the given file. | |
1751 | * | |
1752 | * If alloc_type == 0, this request is for an ALLOCSP type | |
1753 | * request which will change the file size. In this case, no | |
1754 | * DMAPI event will be generated by the call. A TRUNCATE event | |
1755 | * will be generated later by xfs_setattr. | |
1756 | * | |
1757 | * If alloc_type != 0, this request is for a RESVSP type | |
1758 | * request, and a DMAPI DM_EVENT_WRITE will be generated if the | |
1759 | * lower block boundary byte address is less than the file's | |
1760 | * length. | |
1761 | * | |
1762 | * RETURNS: | |
1763 | * 0 on success | |
1764 | * errno on error | |
1765 | * | |
1766 | */ | |
ba0f32d4 | 1767 | STATIC int |
1da177e4 LT |
1768 | xfs_alloc_file_space( |
1769 | xfs_inode_t *ip, | |
1770 | xfs_off_t offset, | |
1771 | xfs_off_t len, | |
1772 | int alloc_type, | |
1773 | int attr_flags) | |
1774 | { | |
dd9f438e NS |
1775 | xfs_mount_t *mp = ip->i_mount; |
1776 | xfs_off_t count; | |
1da177e4 LT |
1777 | xfs_filblks_t allocated_fsb; |
1778 | xfs_filblks_t allocatesize_fsb; | |
dd9f438e NS |
1779 | xfs_extlen_t extsz, temp; |
1780 | xfs_fileoff_t startoffset_fsb; | |
1da177e4 | 1781 | xfs_fsblock_t firstfsb; |
dd9f438e | 1782 | int nimaps; |
dd9f438e | 1783 | int quota_flag; |
1da177e4 | 1784 | int rt; |
1da177e4 | 1785 | xfs_trans_t *tp; |
dd9f438e NS |
1786 | xfs_bmbt_irec_t imaps[1], *imapp; |
1787 | xfs_bmap_free_t free_list; | |
1788 | uint qblocks, resblks, resrtextents; | |
1789 | int committed; | |
1790 | int error; | |
1da177e4 | 1791 | |
cca28fb8 | 1792 | trace_xfs_alloc_file_space(ip); |
1da177e4 LT |
1793 | |
1794 | if (XFS_FORCED_SHUTDOWN(mp)) | |
1795 | return XFS_ERROR(EIO); | |
1796 | ||
7d095257 CH |
1797 | error = xfs_qm_dqattach(ip, 0); |
1798 | if (error) | |
1da177e4 LT |
1799 | return error; |
1800 | ||
1801 | if (len <= 0) | |
1802 | return XFS_ERROR(EINVAL); | |
1803 | ||
957d0ebe DC |
1804 | rt = XFS_IS_REALTIME_INODE(ip); |
1805 | extsz = xfs_get_extsz_hint(ip); | |
1806 | ||
1da177e4 | 1807 | count = len; |
1da177e4 | 1808 | imapp = &imaps[0]; |
dd9f438e | 1809 | nimaps = 1; |
1da177e4 LT |
1810 | startoffset_fsb = XFS_B_TO_FSBT(mp, offset); |
1811 | allocatesize_fsb = XFS_B_TO_FSB(mp, count); | |
1812 | ||
1da177e4 | 1813 | /* |
dd9f438e | 1814 | * Allocate file space until done or until there is an error |
1da177e4 | 1815 | */ |
1da177e4 | 1816 | while (allocatesize_fsb && !error) { |
dd9f438e NS |
1817 | xfs_fileoff_t s, e; |
1818 | ||
1da177e4 | 1819 | /* |
3ddb8fa9 | 1820 | * Determine space reservations for data/realtime. |
1da177e4 | 1821 | */ |
dd9f438e | 1822 | if (unlikely(extsz)) { |
1da177e4 | 1823 | s = startoffset_fsb; |
dd9f438e NS |
1824 | do_div(s, extsz); |
1825 | s *= extsz; | |
1826 | e = startoffset_fsb + allocatesize_fsb; | |
1827 | if ((temp = do_mod(startoffset_fsb, extsz))) | |
1828 | e += temp; | |
1829 | if ((temp = do_mod(e, extsz))) | |
1830 | e += extsz - temp; | |
1831 | } else { | |
1832 | s = 0; | |
1833 | e = allocatesize_fsb; | |
1834 | } | |
1835 | ||
72656c46 DC |
1836 | /* |
1837 | * The transaction reservation is limited to a 32-bit block | |
1838 | * count, hence we need to limit the number of blocks we are | |
1839 | * trying to reserve to avoid an overflow. We can't allocate | |
1840 | * more than @nimaps extents, and an extent is limited on disk | |
1841 | * to MAXEXTLEN (21 bits), so use that to enforce the limit. | |
1842 | */ | |
1843 | resblks = min_t(xfs_fileoff_t, (e - s), (MAXEXTLEN * nimaps)); | |
dd9f438e | 1844 | if (unlikely(rt)) { |
72656c46 | 1845 | resrtextents = qblocks = resblks; |
dd9f438e NS |
1846 | resrtextents /= mp->m_sb.sb_rextsize; |
1847 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); | |
1848 | quota_flag = XFS_QMOPT_RES_RTBLKS; | |
1da177e4 | 1849 | } else { |
dd9f438e | 1850 | resrtextents = 0; |
72656c46 | 1851 | resblks = qblocks = XFS_DIOSTRAT_SPACE_RES(mp, resblks); |
dd9f438e | 1852 | quota_flag = XFS_QMOPT_RES_REGBLKS; |
1da177e4 LT |
1853 | } |
1854 | ||
1855 | /* | |
dd9f438e | 1856 | * Allocate and setup the transaction. |
1da177e4 LT |
1857 | */ |
1858 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); | |
dd9f438e NS |
1859 | error = xfs_trans_reserve(tp, resblks, |
1860 | XFS_WRITE_LOG_RES(mp), resrtextents, | |
1da177e4 LT |
1861 | XFS_TRANS_PERM_LOG_RES, |
1862 | XFS_WRITE_LOG_COUNT); | |
1da177e4 | 1863 | /* |
dd9f438e | 1864 | * Check for running out of space |
1da177e4 LT |
1865 | */ |
1866 | if (error) { | |
1867 | /* | |
1868 | * Free the transaction structure. | |
1869 | */ | |
1870 | ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); | |
1871 | xfs_trans_cancel(tp, 0); | |
1872 | break; | |
1873 | } | |
1874 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
7d095257 CH |
1875 | error = xfs_trans_reserve_quota_nblks(tp, ip, qblocks, |
1876 | 0, quota_flag); | |
1da177e4 LT |
1877 | if (error) |
1878 | goto error1; | |
1879 | ||
ddc3415a | 1880 | xfs_trans_ijoin(tp, ip, 0); |
1da177e4 | 1881 | |
9d87c319 | 1882 | xfs_bmap_init(&free_list, &firstfsb); |
c0dc7828 DC |
1883 | error = xfs_bmapi_write(tp, ip, startoffset_fsb, |
1884 | allocatesize_fsb, alloc_type, &firstfsb, | |
1885 | 0, imapp, &nimaps, &free_list); | |
1da177e4 LT |
1886 | if (error) { |
1887 | goto error0; | |
1888 | } | |
1889 | ||
1890 | /* | |
dd9f438e | 1891 | * Complete the transaction |
1da177e4 | 1892 | */ |
f7c99b6f | 1893 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
1894 | if (error) { |
1895 | goto error0; | |
1896 | } | |
1897 | ||
1c72bf90 | 1898 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
1899 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
1900 | if (error) { | |
1901 | break; | |
1902 | } | |
1903 | ||
1904 | allocated_fsb = imapp->br_blockcount; | |
1905 | ||
dd9f438e | 1906 | if (nimaps == 0) { |
1da177e4 LT |
1907 | error = XFS_ERROR(ENOSPC); |
1908 | break; | |
1909 | } | |
1910 | ||
1911 | startoffset_fsb += allocated_fsb; | |
1912 | allocatesize_fsb -= allocated_fsb; | |
1913 | } | |
1da177e4 LT |
1914 | |
1915 | return error; | |
1916 | ||
dd9f438e | 1917 | error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */ |
1da177e4 | 1918 | xfs_bmap_cancel(&free_list); |
ea562ed6 | 1919 | xfs_trans_unreserve_quota_nblks(tp, ip, (long)qblocks, 0, quota_flag); |
dd9f438e NS |
1920 | |
1921 | error1: /* Just cancel transaction */ | |
1da177e4 LT |
1922 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
1923 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
288699fe | 1924 | return error; |
1da177e4 LT |
1925 | } |
1926 | ||
1927 | /* | |
1928 | * Zero file bytes between startoff and endoff inclusive. | |
1929 | * The iolock is held exclusive and no blocks are buffered. | |
2fd6f6ec LM |
1930 | * |
1931 | * This function is used by xfs_free_file_space() to zero | |
1932 | * partial blocks when the range to free is not block aligned. | |
1933 | * When unreserving space with boundaries that are not block | |
1934 | * aligned we round up the start and round down the end | |
1935 | * boundaries and then use this function to zero the parts of | |
1936 | * the blocks that got dropped during the rounding. | |
1da177e4 LT |
1937 | */ |
1938 | STATIC int | |
1939 | xfs_zero_remaining_bytes( | |
1940 | xfs_inode_t *ip, | |
1941 | xfs_off_t startoff, | |
1942 | xfs_off_t endoff) | |
1943 | { | |
1944 | xfs_bmbt_irec_t imap; | |
1945 | xfs_fileoff_t offset_fsb; | |
1946 | xfs_off_t lastoffset; | |
1947 | xfs_off_t offset; | |
1948 | xfs_buf_t *bp; | |
1949 | xfs_mount_t *mp = ip->i_mount; | |
1950 | int nimap; | |
1951 | int error = 0; | |
1952 | ||
2fd6f6ec LM |
1953 | /* |
1954 | * Avoid doing I/O beyond eof - it's not necessary | |
1955 | * since nothing can read beyond eof. The space will | |
1956 | * be zeroed when the file is extended anyway. | |
1957 | */ | |
ce7ae151 | 1958 | if (startoff >= XFS_ISIZE(ip)) |
2fd6f6ec LM |
1959 | return 0; |
1960 | ||
ce7ae151 CH |
1961 | if (endoff > XFS_ISIZE(ip)) |
1962 | endoff = XFS_ISIZE(ip); | |
2fd6f6ec | 1963 | |
686865f7 DC |
1964 | bp = xfs_buf_get_uncached(XFS_IS_REALTIME_INODE(ip) ? |
1965 | mp->m_rtdev_targp : mp->m_ddev_targp, | |
aa5c158e | 1966 | BTOBB(mp->m_sb.sb_blocksize), 0); |
c6422617 LM |
1967 | if (!bp) |
1968 | return XFS_ERROR(ENOMEM); | |
1da177e4 | 1969 | |
c8da0faf CH |
1970 | xfs_buf_unlock(bp); |
1971 | ||
1da177e4 LT |
1972 | for (offset = startoff; offset <= endoff; offset = lastoffset + 1) { |
1973 | offset_fsb = XFS_B_TO_FSBT(mp, offset); | |
1974 | nimap = 1; | |
5c8ed202 | 1975 | error = xfs_bmapi_read(ip, offset_fsb, 1, &imap, &nimap, 0); |
1da177e4 LT |
1976 | if (error || nimap < 1) |
1977 | break; | |
1978 | ASSERT(imap.br_blockcount >= 1); | |
1979 | ASSERT(imap.br_startoff == offset_fsb); | |
1980 | lastoffset = XFS_FSB_TO_B(mp, imap.br_startoff + 1) - 1; | |
1981 | if (lastoffset > endoff) | |
1982 | lastoffset = endoff; | |
1983 | if (imap.br_startblock == HOLESTARTBLOCK) | |
1984 | continue; | |
1985 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
1986 | if (imap.br_state == XFS_EXT_UNWRITTEN) | |
1987 | continue; | |
1988 | XFS_BUF_UNDONE(bp); | |
1989 | XFS_BUF_UNWRITE(bp); | |
1990 | XFS_BUF_READ(bp); | |
9d87c319 | 1991 | XFS_BUF_SET_ADDR(bp, xfs_fsb_to_db(ip, imap.br_startblock)); |
1da177e4 | 1992 | xfsbdstrat(mp, bp); |
1a1a3e97 | 1993 | error = xfs_buf_iowait(bp); |
d64e31a2 | 1994 | if (error) { |
901796af CH |
1995 | xfs_buf_ioerror_alert(bp, |
1996 | "xfs_zero_remaining_bytes(read)"); | |
1da177e4 LT |
1997 | break; |
1998 | } | |
62926044 | 1999 | memset(bp->b_addr + |
1da177e4 LT |
2000 | (offset - XFS_FSB_TO_B(mp, imap.br_startoff)), |
2001 | 0, lastoffset - offset + 1); | |
2002 | XFS_BUF_UNDONE(bp); | |
2003 | XFS_BUF_UNREAD(bp); | |
2004 | XFS_BUF_WRITE(bp); | |
2005 | xfsbdstrat(mp, bp); | |
1a1a3e97 | 2006 | error = xfs_buf_iowait(bp); |
d64e31a2 | 2007 | if (error) { |
901796af CH |
2008 | xfs_buf_ioerror_alert(bp, |
2009 | "xfs_zero_remaining_bytes(write)"); | |
1da177e4 LT |
2010 | break; |
2011 | } | |
2012 | } | |
2013 | xfs_buf_free(bp); | |
2014 | return error; | |
2015 | } | |
2016 | ||
2017 | /* | |
2018 | * xfs_free_file_space() | |
2019 | * This routine frees disk space for the given file. | |
2020 | * | |
2021 | * This routine is only called by xfs_change_file_space | |
2022 | * for an UNRESVSP type call. | |
2023 | * | |
2024 | * RETURNS: | |
2025 | * 0 on success | |
2026 | * errno on error | |
2027 | * | |
2028 | */ | |
2029 | STATIC int | |
2030 | xfs_free_file_space( | |
2031 | xfs_inode_t *ip, | |
2032 | xfs_off_t offset, | |
2033 | xfs_off_t len, | |
2034 | int attr_flags) | |
2035 | { | |
2036 | int committed; | |
2037 | int done; | |
1da177e4 LT |
2038 | xfs_fileoff_t endoffset_fsb; |
2039 | int error; | |
2040 | xfs_fsblock_t firstfsb; | |
2041 | xfs_bmap_free_t free_list; | |
1da177e4 LT |
2042 | xfs_bmbt_irec_t imap; |
2043 | xfs_off_t ioffset; | |
2044 | xfs_extlen_t mod=0; | |
2045 | xfs_mount_t *mp; | |
2046 | int nimap; | |
2047 | uint resblks; | |
673cdf5c | 2048 | uint rounding; |
1da177e4 LT |
2049 | int rt; |
2050 | xfs_fileoff_t startoffset_fsb; | |
2051 | xfs_trans_t *tp; | |
5fcbab35 | 2052 | int need_iolock = 1; |
1da177e4 | 2053 | |
1da177e4 LT |
2054 | mp = ip->i_mount; |
2055 | ||
cca28fb8 | 2056 | trace_xfs_free_file_space(ip); |
bd5a876a | 2057 | |
7d095257 CH |
2058 | error = xfs_qm_dqattach(ip, 0); |
2059 | if (error) | |
1da177e4 LT |
2060 | return error; |
2061 | ||
2062 | error = 0; | |
2063 | if (len <= 0) /* if nothing being freed */ | |
2064 | return error; | |
71ddabb9 | 2065 | rt = XFS_IS_REALTIME_INODE(ip); |
1da177e4 | 2066 | startoffset_fsb = XFS_B_TO_FSB(mp, offset); |
288699fe | 2067 | endoffset_fsb = XFS_B_TO_FSBT(mp, offset + len); |
1da177e4 | 2068 | |
0f285c8a | 2069 | if (attr_flags & XFS_ATTR_NOLOCK) |
5fcbab35 | 2070 | need_iolock = 0; |
9fa8046f | 2071 | if (need_iolock) { |
1da177e4 | 2072 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
25e41b3d | 2073 | /* wait for the completion of any pending DIOs */ |
4a06fd26 | 2074 | inode_dio_wait(VFS_I(ip)); |
9fa8046f | 2075 | } |
5fcbab35 | 2076 | |
e6a4b37f | 2077 | rounding = max_t(uint, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE); |
1da177e4 | 2078 | ioffset = offset & ~(rounding - 1); |
bd5a876a | 2079 | |
df80c933 | 2080 | if (VN_CACHED(VFS_I(ip)) != 0) { |
e6a4b37f | 2081 | error = xfs_flushinval_pages(ip, ioffset, -1, FI_REMAPF_LOCKED); |
d3cf2094 LM |
2082 | if (error) |
2083 | goto out_unlock_iolock; | |
bd5a876a CH |
2084 | } |
2085 | ||
1da177e4 LT |
2086 | /* |
2087 | * Need to zero the stuff we're not freeing, on disk. | |
9da096fd | 2088 | * If it's a realtime file & can't use unwritten extents then we |
1da177e4 LT |
2089 | * actually need to zero the extent edges. Otherwise xfs_bunmapi |
2090 | * will take care of it for us. | |
2091 | */ | |
62118709 | 2092 | if (rt && !xfs_sb_version_hasextflgbit(&mp->m_sb)) { |
1da177e4 | 2093 | nimap = 1; |
5c8ed202 DC |
2094 | error = xfs_bmapi_read(ip, startoffset_fsb, 1, |
2095 | &imap, &nimap, 0); | |
1da177e4 LT |
2096 | if (error) |
2097 | goto out_unlock_iolock; | |
2098 | ASSERT(nimap == 0 || nimap == 1); | |
2099 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { | |
2100 | xfs_daddr_t block; | |
2101 | ||
2102 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
2103 | block = imap.br_startblock; | |
2104 | mod = do_div(block, mp->m_sb.sb_rextsize); | |
2105 | if (mod) | |
2106 | startoffset_fsb += mp->m_sb.sb_rextsize - mod; | |
2107 | } | |
2108 | nimap = 1; | |
5c8ed202 DC |
2109 | error = xfs_bmapi_read(ip, endoffset_fsb - 1, 1, |
2110 | &imap, &nimap, 0); | |
1da177e4 LT |
2111 | if (error) |
2112 | goto out_unlock_iolock; | |
2113 | ASSERT(nimap == 0 || nimap == 1); | |
2114 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { | |
2115 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
2116 | mod++; | |
2117 | if (mod && (mod != mp->m_sb.sb_rextsize)) | |
2118 | endoffset_fsb -= mod; | |
2119 | } | |
2120 | } | |
2121 | if ((done = (endoffset_fsb <= startoffset_fsb))) | |
2122 | /* | |
2123 | * One contiguous piece to clear | |
2124 | */ | |
2125 | error = xfs_zero_remaining_bytes(ip, offset, offset + len - 1); | |
2126 | else { | |
2127 | /* | |
2128 | * Some full blocks, possibly two pieces to clear | |
2129 | */ | |
2130 | if (offset < XFS_FSB_TO_B(mp, startoffset_fsb)) | |
2131 | error = xfs_zero_remaining_bytes(ip, offset, | |
2132 | XFS_FSB_TO_B(mp, startoffset_fsb) - 1); | |
2133 | if (!error && | |
2134 | XFS_FSB_TO_B(mp, endoffset_fsb) < offset + len) | |
2135 | error = xfs_zero_remaining_bytes(ip, | |
2136 | XFS_FSB_TO_B(mp, endoffset_fsb), | |
2137 | offset + len - 1); | |
2138 | } | |
2139 | ||
2140 | /* | |
2141 | * free file space until done or until there is an error | |
2142 | */ | |
2143 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); | |
2144 | while (!error && !done) { | |
2145 | ||
2146 | /* | |
91ebecc7 DC |
2147 | * allocate and setup the transaction. Allow this |
2148 | * transaction to dip into the reserve blocks to ensure | |
2149 | * the freeing of the space succeeds at ENOSPC. | |
1da177e4 LT |
2150 | */ |
2151 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); | |
91ebecc7 | 2152 | tp->t_flags |= XFS_TRANS_RESERVE; |
1da177e4 LT |
2153 | error = xfs_trans_reserve(tp, |
2154 | resblks, | |
2155 | XFS_WRITE_LOG_RES(mp), | |
2156 | 0, | |
2157 | XFS_TRANS_PERM_LOG_RES, | |
2158 | XFS_WRITE_LOG_COUNT); | |
2159 | ||
2160 | /* | |
2161 | * check for running out of space | |
2162 | */ | |
2163 | if (error) { | |
2164 | /* | |
2165 | * Free the transaction structure. | |
2166 | */ | |
2167 | ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); | |
2168 | xfs_trans_cancel(tp, 0); | |
2169 | break; | |
2170 | } | |
2171 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
7d095257 CH |
2172 | error = xfs_trans_reserve_quota(tp, mp, |
2173 | ip->i_udquot, ip->i_gdquot, | |
2174 | resblks, 0, XFS_QMOPT_RES_REGBLKS); | |
1da177e4 LT |
2175 | if (error) |
2176 | goto error1; | |
2177 | ||
ddc3415a | 2178 | xfs_trans_ijoin(tp, ip, 0); |
1da177e4 LT |
2179 | |
2180 | /* | |
2181 | * issue the bunmapi() call to free the blocks | |
2182 | */ | |
9d87c319 | 2183 | xfs_bmap_init(&free_list, &firstfsb); |
541d7d3c | 2184 | error = xfs_bunmapi(tp, ip, startoffset_fsb, |
1da177e4 | 2185 | endoffset_fsb - startoffset_fsb, |
b4e9181e | 2186 | 0, 2, &firstfsb, &free_list, &done); |
1da177e4 LT |
2187 | if (error) { |
2188 | goto error0; | |
2189 | } | |
2190 | ||
2191 | /* | |
2192 | * complete the transaction | |
2193 | */ | |
f7c99b6f | 2194 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
2195 | if (error) { |
2196 | goto error0; | |
2197 | } | |
2198 | ||
1c72bf90 | 2199 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
2200 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
2201 | } | |
2202 | ||
2203 | out_unlock_iolock: | |
2204 | if (need_iolock) | |
2205 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
2206 | return error; | |
2207 | ||
2208 | error0: | |
2209 | xfs_bmap_cancel(&free_list); | |
2210 | error1: | |
2211 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
2212 | xfs_iunlock(ip, need_iolock ? (XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL) : | |
2213 | XFS_ILOCK_EXCL); | |
2214 | return error; | |
2215 | } | |
2216 | ||
2217 | /* | |
2218 | * xfs_change_file_space() | |
2219 | * This routine allocates or frees disk space for the given file. | |
2220 | * The user specified parameters are checked for alignment and size | |
2221 | * limitations. | |
2222 | * | |
2223 | * RETURNS: | |
2224 | * 0 on success | |
2225 | * errno on error | |
2226 | * | |
2227 | */ | |
2228 | int | |
2229 | xfs_change_file_space( | |
993386c1 | 2230 | xfs_inode_t *ip, |
1da177e4 LT |
2231 | int cmd, |
2232 | xfs_flock64_t *bf, | |
2233 | xfs_off_t offset, | |
1da177e4 LT |
2234 | int attr_flags) |
2235 | { | |
993386c1 | 2236 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 LT |
2237 | int clrprealloc; |
2238 | int error; | |
2239 | xfs_fsize_t fsize; | |
1da177e4 LT |
2240 | int setprealloc; |
2241 | xfs_off_t startoffset; | |
2242 | xfs_off_t llen; | |
2243 | xfs_trans_t *tp; | |
0f285c8a | 2244 | struct iattr iattr; |
44722352 | 2245 | int prealloc_type; |
1da177e4 | 2246 | |
993386c1 | 2247 | if (!S_ISREG(ip->i_d.di_mode)) |
1da177e4 LT |
2248 | return XFS_ERROR(EINVAL); |
2249 | ||
1da177e4 LT |
2250 | switch (bf->l_whence) { |
2251 | case 0: /*SEEK_SET*/ | |
2252 | break; | |
2253 | case 1: /*SEEK_CUR*/ | |
2254 | bf->l_start += offset; | |
2255 | break; | |
2256 | case 2: /*SEEK_END*/ | |
ce7ae151 | 2257 | bf->l_start += XFS_ISIZE(ip); |
1da177e4 LT |
2258 | break; |
2259 | default: | |
2260 | return XFS_ERROR(EINVAL); | |
2261 | } | |
2262 | ||
2263 | llen = bf->l_len > 0 ? bf->l_len - 1 : bf->l_len; | |
2264 | ||
2265 | if ( (bf->l_start < 0) | |
2266 | || (bf->l_start > XFS_MAXIOFFSET(mp)) | |
2267 | || (bf->l_start + llen < 0) | |
2268 | || (bf->l_start + llen > XFS_MAXIOFFSET(mp))) | |
2269 | return XFS_ERROR(EINVAL); | |
2270 | ||
2271 | bf->l_whence = 0; | |
2272 | ||
2273 | startoffset = bf->l_start; | |
ce7ae151 | 2274 | fsize = XFS_ISIZE(ip); |
1da177e4 LT |
2275 | |
2276 | /* | |
2277 | * XFS_IOC_RESVSP and XFS_IOC_UNRESVSP will reserve or unreserve | |
2278 | * file space. | |
2279 | * These calls do NOT zero the data space allocated to the file, | |
2280 | * nor do they change the file size. | |
2281 | * | |
2282 | * XFS_IOC_ALLOCSP and XFS_IOC_FREESP will allocate and free file | |
2283 | * space. | |
2284 | * These calls cause the new file data to be zeroed and the file | |
2285 | * size to be changed. | |
2286 | */ | |
2287 | setprealloc = clrprealloc = 0; | |
44722352 | 2288 | prealloc_type = XFS_BMAPI_PREALLOC; |
1da177e4 LT |
2289 | |
2290 | switch (cmd) { | |
44722352 DC |
2291 | case XFS_IOC_ZERO_RANGE: |
2292 | prealloc_type |= XFS_BMAPI_CONVERT; | |
2293 | xfs_tosspages(ip, startoffset, startoffset + bf->l_len, 0); | |
2294 | /* FALLTHRU */ | |
1da177e4 LT |
2295 | case XFS_IOC_RESVSP: |
2296 | case XFS_IOC_RESVSP64: | |
2297 | error = xfs_alloc_file_space(ip, startoffset, bf->l_len, | |
44722352 | 2298 | prealloc_type, attr_flags); |
1da177e4 LT |
2299 | if (error) |
2300 | return error; | |
2301 | setprealloc = 1; | |
2302 | break; | |
2303 | ||
2304 | case XFS_IOC_UNRESVSP: | |
2305 | case XFS_IOC_UNRESVSP64: | |
2306 | if ((error = xfs_free_file_space(ip, startoffset, bf->l_len, | |
2307 | attr_flags))) | |
2308 | return error; | |
2309 | break; | |
2310 | ||
2311 | case XFS_IOC_ALLOCSP: | |
2312 | case XFS_IOC_ALLOCSP64: | |
2313 | case XFS_IOC_FREESP: | |
2314 | case XFS_IOC_FREESP64: | |
bc4010ec DC |
2315 | /* |
2316 | * These operations actually do IO when extending the file, but | |
2317 | * the allocation is done seperately to the zeroing that is | |
2318 | * done. This set of operations need to be serialised against | |
2319 | * other IO operations, such as truncate and buffered IO. We | |
2320 | * need to take the IOLOCK here to serialise the allocation and | |
2321 | * zeroing IO to prevent other IOLOCK holders (e.g. getbmap, | |
2322 | * truncate, direct IO) from racing against the transient | |
2323 | * allocated but not written state we can have here. | |
2324 | */ | |
2325 | xfs_ilock(ip, XFS_IOLOCK_EXCL); | |
1da177e4 LT |
2326 | if (startoffset > fsize) { |
2327 | error = xfs_alloc_file_space(ip, fsize, | |
bc4010ec DC |
2328 | startoffset - fsize, 0, |
2329 | attr_flags | XFS_ATTR_NOLOCK); | |
2330 | if (error) { | |
2331 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
1da177e4 | 2332 | break; |
bc4010ec | 2333 | } |
1da177e4 LT |
2334 | } |
2335 | ||
0f285c8a CH |
2336 | iattr.ia_valid = ATTR_SIZE; |
2337 | iattr.ia_size = startoffset; | |
1da177e4 | 2338 | |
bc4010ec DC |
2339 | error = xfs_setattr_size(ip, &iattr, |
2340 | attr_flags | XFS_ATTR_NOLOCK); | |
2341 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
1da177e4 LT |
2342 | |
2343 | if (error) | |
2344 | return error; | |
2345 | ||
2346 | clrprealloc = 1; | |
2347 | break; | |
2348 | ||
2349 | default: | |
2350 | ASSERT(0); | |
2351 | return XFS_ERROR(EINVAL); | |
2352 | } | |
2353 | ||
2354 | /* | |
2355 | * update the inode timestamp, mode, and prealloc flag bits | |
2356 | */ | |
2357 | tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID); | |
2358 | ||
2359 | if ((error = xfs_trans_reserve(tp, 0, XFS_WRITEID_LOG_RES(mp), | |
2360 | 0, 0, 0))) { | |
2361 | /* ASSERT(0); */ | |
2362 | xfs_trans_cancel(tp, 0); | |
2363 | return error; | |
2364 | } | |
2365 | ||
2366 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
ddc3415a | 2367 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
1da177e4 | 2368 | |
0f285c8a | 2369 | if ((attr_flags & XFS_ATTR_DMI) == 0) { |
1da177e4 LT |
2370 | ip->i_d.di_mode &= ~S_ISUID; |
2371 | ||
2372 | /* | |
2373 | * Note that we don't have to worry about mandatory | |
2374 | * file locking being disabled here because we only | |
2375 | * clear the S_ISGID bit if the Group execute bit is | |
2376 | * on, but if it was on then mandatory locking wouldn't | |
2377 | * have been enabled. | |
2378 | */ | |
2379 | if (ip->i_d.di_mode & S_IXGRP) | |
2380 | ip->i_d.di_mode &= ~S_ISGID; | |
2381 | ||
dcd79a14 | 2382 | xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1da177e4 LT |
2383 | } |
2384 | if (setprealloc) | |
2385 | ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC; | |
2386 | else if (clrprealloc) | |
2387 | ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC; | |
2388 | ||
2389 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
82878897 DC |
2390 | if (attr_flags & XFS_ATTR_SYNC) |
2391 | xfs_trans_set_sync(tp); | |
23bb0be1 | 2392 | return xfs_trans_commit(tp, 0); |
1da177e4 | 2393 | } |