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 | 89 | if (error) { |
901796af | 90 | xfs_buf_ioerror_alert(bp, __func__); |
804c83c3 CH |
91 | xfs_buf_relse(bp); |
92 | goto out; | |
93 | } | |
94 | if (pathlen < byte_cnt) | |
95 | byte_cnt = pathlen; | |
96 | pathlen -= byte_cnt; | |
97 | ||
62926044 | 98 | memcpy(link, bp->b_addr, byte_cnt); |
804c83c3 CH |
99 | xfs_buf_relse(bp); |
100 | } | |
101 | ||
102 | link[ip->i_d.di_size] = '\0'; | |
103 | error = 0; | |
104 | ||
105 | out: | |
106 | return error; | |
107 | } | |
108 | ||
993386c1 | 109 | int |
1da177e4 | 110 | xfs_readlink( |
993386c1 | 111 | xfs_inode_t *ip, |
804c83c3 | 112 | char *link) |
1da177e4 | 113 | { |
804c83c3 | 114 | xfs_mount_t *mp = ip->i_mount; |
b52a360b | 115 | xfs_fsize_t pathlen; |
1da177e4 | 116 | int error = 0; |
1da177e4 | 117 | |
cca28fb8 | 118 | trace_xfs_readlink(ip); |
1da177e4 LT |
119 | |
120 | if (XFS_FORCED_SHUTDOWN(mp)) | |
121 | return XFS_ERROR(EIO); | |
122 | ||
123 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
124 | ||
804c83c3 CH |
125 | pathlen = ip->i_d.di_size; |
126 | if (!pathlen) | |
127 | goto out; | |
1da177e4 | 128 | |
b52a360b CM |
129 | if (pathlen < 0 || pathlen > MAXPATHLEN) { |
130 | xfs_alert(mp, "%s: inode (%llu) bad symlink length (%lld)", | |
131 | __func__, (unsigned long long) ip->i_ino, | |
132 | (long long) pathlen); | |
133 | ASSERT(0); | |
134 | return XFS_ERROR(EFSCORRUPTED); | |
135 | } | |
136 | ||
137 | ||
1da177e4 | 138 | if (ip->i_df.if_flags & XFS_IFINLINE) { |
804c83c3 CH |
139 | memcpy(link, ip->i_df.if_u1.if_data, pathlen); |
140 | link[pathlen] = '\0'; | |
141 | } else { | |
142 | error = xfs_readlink_bmap(ip, link); | |
1da177e4 LT |
143 | } |
144 | ||
804c83c3 | 145 | out: |
1da177e4 | 146 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
1da177e4 LT |
147 | return error; |
148 | } | |
149 | ||
c56c9631 CH |
150 | /* |
151 | * Flags for xfs_free_eofblocks | |
152 | */ | |
153 | #define XFS_FREE_EOF_TRYLOCK (1<<0) | |
154 | ||
1da177e4 | 155 | /* |
92dfe8d2 DC |
156 | * This is called by xfs_inactive to free any blocks beyond eof |
157 | * when the link count isn't zero and by xfs_dm_punch_hole() when | |
158 | * punching a hole to EOF. | |
1da177e4 | 159 | */ |
d96f8f89 | 160 | STATIC int |
92dfe8d2 | 161 | xfs_free_eofblocks( |
1da177e4 | 162 | xfs_mount_t *mp, |
92dfe8d2 DC |
163 | xfs_inode_t *ip, |
164 | int flags) | |
1da177e4 LT |
165 | { |
166 | xfs_trans_t *tp; | |
167 | int error; | |
168 | xfs_fileoff_t end_fsb; | |
169 | xfs_fileoff_t last_fsb; | |
170 | xfs_filblks_t map_len; | |
171 | int nimaps; | |
172 | xfs_bmbt_irec_t imap; | |
173 | ||
174 | /* | |
175 | * Figure out if there are any blocks beyond the end | |
176 | * of the file. If not, then there is nothing to do. | |
177 | */ | |
ba87ea69 | 178 | end_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)ip->i_size)); |
1da177e4 | 179 | last_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp)); |
3f34885c | 180 | if (last_fsb <= end_fsb) |
014c2544 | 181 | return 0; |
3f34885c | 182 | map_len = last_fsb - end_fsb; |
1da177e4 LT |
183 | |
184 | nimaps = 1; | |
185 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
5c8ed202 | 186 | error = xfs_bmapi_read(ip, end_fsb, map_len, &imap, &nimaps, 0); |
1da177e4 LT |
187 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
188 | ||
189 | if (!error && (nimaps != 0) && | |
68bdb6ea YL |
190 | (imap.br_startblock != HOLESTARTBLOCK || |
191 | ip->i_delayed_blks)) { | |
1da177e4 LT |
192 | /* |
193 | * Attach the dquots to the inode up front. | |
194 | */ | |
7d095257 CH |
195 | error = xfs_qm_dqattach(ip, 0); |
196 | if (error) | |
014c2544 | 197 | return error; |
1da177e4 LT |
198 | |
199 | /* | |
200 | * There are blocks after the end of file. | |
201 | * Free them up now by truncating the file to | |
202 | * its current size. | |
203 | */ | |
204 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
205 | ||
c56c9631 CH |
206 | if (flags & XFS_FREE_EOF_TRYLOCK) { |
207 | if (!xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL)) { | |
208 | xfs_trans_cancel(tp, 0); | |
209 | return 0; | |
210 | } | |
211 | } else { | |
92dfe8d2 | 212 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
c56c9631 | 213 | } |
1da177e4 LT |
214 | |
215 | error = xfs_trans_reserve(tp, 0, | |
216 | XFS_ITRUNCATE_LOG_RES(mp), | |
217 | 0, XFS_TRANS_PERM_LOG_RES, | |
218 | XFS_ITRUNCATE_LOG_COUNT); | |
219 | if (error) { | |
220 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
221 | xfs_trans_cancel(tp, 0); | |
222 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
014c2544 | 223 | return error; |
1da177e4 LT |
224 | } |
225 | ||
226 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
ddc3415a | 227 | xfs_trans_ijoin(tp, ip, 0); |
1da177e4 | 228 | |
673e8e59 CH |
229 | /* |
230 | * Do not update the on-disk file size. If we update the | |
231 | * on-disk file size and then the system crashes before the | |
232 | * contents of the file are flushed to disk then the files | |
233 | * may be full of holes (ie NULL files bug). | |
234 | */ | |
235 | error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, | |
236 | ip->i_size); | |
1da177e4 | 237 | if (error) { |
8f04c47a CH |
238 | /* |
239 | * If we get an error at this point we simply don't | |
240 | * bother truncating the file. | |
241 | */ | |
1da177e4 LT |
242 | xfs_trans_cancel(tp, |
243 | (XFS_TRANS_RELEASE_LOG_RES | | |
244 | XFS_TRANS_ABORT)); | |
245 | } else { | |
246 | error = xfs_trans_commit(tp, | |
1c72bf90 | 247 | XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 | 248 | } |
c56c9631 | 249 | xfs_iunlock(ip, XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL); |
1da177e4 | 250 | } |
014c2544 | 251 | return error; |
1da177e4 LT |
252 | } |
253 | ||
254 | /* | |
255 | * Free a symlink that has blocks associated with it. | |
256 | */ | |
257 | STATIC int | |
258 | xfs_inactive_symlink_rmt( | |
259 | xfs_inode_t *ip, | |
260 | xfs_trans_t **tpp) | |
261 | { | |
262 | xfs_buf_t *bp; | |
263 | int committed; | |
264 | int done; | |
265 | int error; | |
266 | xfs_fsblock_t first_block; | |
267 | xfs_bmap_free_t free_list; | |
268 | int i; | |
269 | xfs_mount_t *mp; | |
270 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; | |
271 | int nmaps; | |
272 | xfs_trans_t *ntp; | |
273 | int size; | |
274 | xfs_trans_t *tp; | |
275 | ||
276 | tp = *tpp; | |
277 | mp = ip->i_mount; | |
278 | ASSERT(ip->i_d.di_size > XFS_IFORK_DSIZE(ip)); | |
279 | /* | |
280 | * We're freeing a symlink that has some | |
281 | * blocks allocated to it. Free the | |
282 | * blocks here. We know that we've got | |
283 | * either 1 or 2 extents and that we can | |
284 | * free them all in one bunmapi call. | |
285 | */ | |
286 | ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2); | |
287 | if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, | |
288 | XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) { | |
289 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
290 | xfs_trans_cancel(tp, 0); | |
291 | *tpp = NULL; | |
292 | return error; | |
293 | } | |
294 | /* | |
295 | * Lock the inode, fix the size, and join it to the transaction. | |
296 | * Hold it so in the normal path, we still have it locked for | |
297 | * the second transaction. In the error paths we need it | |
298 | * held so the cancel won't rele it, see below. | |
299 | */ | |
300 | xfs_ilock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
301 | size = (int)ip->i_d.di_size; | |
302 | ip->i_d.di_size = 0; | |
ddc3415a | 303 | xfs_trans_ijoin(tp, ip, 0); |
1da177e4 LT |
304 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
305 | /* | |
306 | * Find the block(s) so we can inval and unmap them. | |
307 | */ | |
308 | done = 0; | |
9d87c319 | 309 | xfs_bmap_init(&free_list, &first_block); |
e8c96f8c | 310 | nmaps = ARRAY_SIZE(mval); |
5c8ed202 DC |
311 | error = xfs_bmapi_read(ip, 0, XFS_B_TO_FSB(mp, size), |
312 | mval, &nmaps, 0); | |
313 | if (error) | |
1da177e4 LT |
314 | goto error0; |
315 | /* | |
316 | * Invalidate the block(s). | |
317 | */ | |
318 | for (i = 0; i < nmaps; i++) { | |
319 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, | |
320 | XFS_FSB_TO_DADDR(mp, mval[i].br_startblock), | |
321 | XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0); | |
2a30f36d CS |
322 | if (!bp) { |
323 | error = ENOMEM; | |
324 | goto error1; | |
325 | } | |
1da177e4 LT |
326 | xfs_trans_binval(tp, bp); |
327 | } | |
328 | /* | |
329 | * Unmap the dead block(s) to the free_list. | |
330 | */ | |
331 | if ((error = xfs_bunmapi(tp, ip, 0, size, XFS_BMAPI_METADATA, nmaps, | |
b4e9181e | 332 | &first_block, &free_list, &done))) |
1da177e4 LT |
333 | goto error1; |
334 | ASSERT(done); | |
335 | /* | |
336 | * Commit the first transaction. This logs the EFI and the inode. | |
337 | */ | |
f7c99b6f | 338 | if ((error = xfs_bmap_finish(&tp, &free_list, &committed))) |
1da177e4 LT |
339 | goto error1; |
340 | /* | |
341 | * The transaction must have been committed, since there were | |
342 | * actually extents freed by xfs_bunmapi. See xfs_bmap_finish. | |
343 | * The new tp has the extent freeing and EFDs. | |
344 | */ | |
345 | ASSERT(committed); | |
346 | /* | |
347 | * The first xact was committed, so add the inode to the new one. | |
348 | * Mark it dirty so it will be logged and moved forward in the log as | |
349 | * part of every commit. | |
350 | */ | |
ddc3415a | 351 | xfs_trans_ijoin(tp, ip, 0); |
1da177e4 LT |
352 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
353 | /* | |
354 | * Get a new, empty transaction to return to our caller. | |
355 | */ | |
356 | ntp = xfs_trans_dup(tp); | |
357 | /* | |
c41564b5 | 358 | * Commit the transaction containing extent freeing and EFDs. |
1da177e4 LT |
359 | * If we get an error on the commit here or on the reserve below, |
360 | * we need to unlock the inode since the new transaction doesn't | |
361 | * have the inode attached. | |
362 | */ | |
1c72bf90 | 363 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
364 | tp = ntp; |
365 | if (error) { | |
366 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
367 | goto error0; | |
368 | } | |
cc09c0dc DC |
369 | /* |
370 | * transaction commit worked ok so we can drop the extra ticket | |
371 | * reference that we gained in xfs_trans_dup() | |
372 | */ | |
373 | xfs_log_ticket_put(tp->t_ticket); | |
374 | ||
1da177e4 LT |
375 | /* |
376 | * Remove the memory for extent descriptions (just bookkeeping). | |
377 | */ | |
378 | if (ip->i_df.if_bytes) | |
379 | xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK); | |
380 | ASSERT(ip->i_df.if_bytes == 0); | |
381 | /* | |
382 | * Put an itruncate log reservation in the new transaction | |
383 | * for our caller. | |
384 | */ | |
385 | if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, | |
386 | XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) { | |
387 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
388 | goto error0; | |
389 | } | |
390 | /* | |
391 | * Return with the inode locked but not joined to the transaction. | |
392 | */ | |
393 | *tpp = tp; | |
394 | return 0; | |
395 | ||
396 | error1: | |
397 | xfs_bmap_cancel(&free_list); | |
398 | error0: | |
399 | /* | |
400 | * Have to come here with the inode locked and either | |
401 | * (held and in the transaction) or (not in the transaction). | |
402 | * If the inode isn't held then cancel would iput it, but | |
403 | * that's wrong since this is inactive and the vnode ref | |
404 | * count is 0 already. | |
405 | * Cancel won't do anything to the inode if held, but it still | |
406 | * needs to be locked until the cancel is done, if it was | |
407 | * joined to the transaction. | |
408 | */ | |
409 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
410 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
411 | *tpp = NULL; | |
412 | return error; | |
413 | ||
414 | } | |
415 | ||
416 | STATIC int | |
417 | xfs_inactive_symlink_local( | |
418 | xfs_inode_t *ip, | |
419 | xfs_trans_t **tpp) | |
420 | { | |
421 | int error; | |
422 | ||
423 | ASSERT(ip->i_d.di_size <= XFS_IFORK_DSIZE(ip)); | |
424 | /* | |
425 | * We're freeing a symlink which fit into | |
426 | * the inode. Just free the memory used | |
427 | * to hold the old symlink. | |
428 | */ | |
429 | error = xfs_trans_reserve(*tpp, 0, | |
430 | XFS_ITRUNCATE_LOG_RES(ip->i_mount), | |
431 | 0, XFS_TRANS_PERM_LOG_RES, | |
432 | XFS_ITRUNCATE_LOG_COUNT); | |
433 | ||
434 | if (error) { | |
435 | xfs_trans_cancel(*tpp, 0); | |
436 | *tpp = NULL; | |
014c2544 | 437 | return error; |
1da177e4 LT |
438 | } |
439 | xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
440 | ||
441 | /* | |
442 | * Zero length symlinks _can_ exist. | |
443 | */ | |
444 | if (ip->i_df.if_bytes > 0) { | |
445 | xfs_idata_realloc(ip, | |
446 | -(ip->i_df.if_bytes), | |
447 | XFS_DATA_FORK); | |
448 | ASSERT(ip->i_df.if_bytes == 0); | |
449 | } | |
014c2544 | 450 | return 0; |
1da177e4 LT |
451 | } |
452 | ||
1da177e4 LT |
453 | STATIC int |
454 | xfs_inactive_attrs( | |
455 | xfs_inode_t *ip, | |
456 | xfs_trans_t **tpp) | |
457 | { | |
458 | xfs_trans_t *tp; | |
459 | int error; | |
460 | xfs_mount_t *mp; | |
461 | ||
579aa9ca | 462 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
1da177e4 LT |
463 | tp = *tpp; |
464 | mp = ip->i_mount; | |
465 | ASSERT(ip->i_d.di_forkoff != 0); | |
e5720eec | 466 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 | 467 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
e5720eec DC |
468 | if (error) |
469 | goto error_unlock; | |
1da177e4 LT |
470 | |
471 | error = xfs_attr_inactive(ip); | |
e5720eec DC |
472 | if (error) |
473 | goto error_unlock; | |
1da177e4 LT |
474 | |
475 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
476 | error = xfs_trans_reserve(tp, 0, | |
477 | XFS_IFREE_LOG_RES(mp), | |
478 | 0, XFS_TRANS_PERM_LOG_RES, | |
479 | XFS_INACTIVE_LOG_COUNT); | |
e5720eec DC |
480 | if (error) |
481 | goto error_cancel; | |
1da177e4 LT |
482 | |
483 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
ddc3415a | 484 | xfs_trans_ijoin(tp, ip, 0); |
1da177e4 LT |
485 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); |
486 | ||
487 | ASSERT(ip->i_d.di_anextents == 0); | |
488 | ||
489 | *tpp = tp; | |
014c2544 | 490 | return 0; |
e5720eec DC |
491 | |
492 | error_cancel: | |
493 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
494 | xfs_trans_cancel(tp, 0); | |
495 | error_unlock: | |
496 | *tpp = NULL; | |
497 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
498 | return error; | |
1da177e4 LT |
499 | } |
500 | ||
993386c1 | 501 | int |
1da177e4 | 502 | xfs_release( |
993386c1 | 503 | xfs_inode_t *ip) |
1da177e4 | 504 | { |
993386c1 | 505 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 LT |
506 | int error; |
507 | ||
42173f68 | 508 | if (!S_ISREG(ip->i_d.di_mode) || (ip->i_d.di_mode == 0)) |
1da177e4 | 509 | return 0; |
1da177e4 LT |
510 | |
511 | /* If this is a read-only mount, don't do this (would generate I/O) */ | |
bd186aa9 | 512 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
1da177e4 LT |
513 | return 0; |
514 | ||
2a82b8be | 515 | if (!XFS_FORCED_SHUTDOWN(mp)) { |
b3aea4ed CH |
516 | int truncated; |
517 | ||
2a82b8be DC |
518 | /* |
519 | * If we are using filestreams, and we have an unlinked | |
520 | * file that we are processing the last close on, then nothing | |
521 | * will be able to reopen and write to this file. Purge this | |
522 | * inode from the filestreams cache so that it doesn't delay | |
523 | * teardown of the inode. | |
524 | */ | |
525 | if ((ip->i_d.di_nlink == 0) && xfs_inode_is_filestream(ip)) | |
526 | xfs_filestream_deassociate(ip); | |
527 | ||
fbf3ce8d CH |
528 | /* |
529 | * If we previously truncated this file and removed old data | |
530 | * in the process, we want to initiate "early" writeout on | |
531 | * the last close. This is an attempt to combat the notorious | |
25985edc | 532 | * NULL files problem which is particularly noticeable from a |
fbf3ce8d CH |
533 | * truncate down, buffered (re-)write (delalloc), followed by |
534 | * a crash. What we are effectively doing here is | |
535 | * significantly reducing the time window where we'd otherwise | |
536 | * be exposed to that problem. | |
537 | */ | |
09262b43 | 538 | truncated = xfs_iflags_test_and_clear(ip, XFS_ITRUNCATED); |
df4368a1 DC |
539 | if (truncated) { |
540 | xfs_iflags_clear(ip, XFS_IDIRTY_RELEASE); | |
541 | if (VN_DIRTY(VFS_I(ip)) && ip->i_delayed_blks > 0) | |
542 | xfs_flush_pages(ip, 0, -1, XBF_ASYNC, FI_NONE); | |
543 | } | |
fbf3ce8d CH |
544 | } |
545 | ||
6e857567 DC |
546 | if (ip->i_d.di_nlink == 0) |
547 | return 0; | |
c56c9631 | 548 | |
abbede1b | 549 | if ((S_ISREG(ip->i_d.di_mode) && |
6e857567 DC |
550 | ((ip->i_size > 0) || (VN_CACHED(VFS_I(ip)) > 0 || |
551 | ip->i_delayed_blks > 0)) && | |
552 | (ip->i_df.if_flags & XFS_IFEXTENTS)) && | |
553 | (!(ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)))) { | |
554 | ||
555 | /* | |
556 | * If we can't get the iolock just skip truncating the blocks | |
557 | * past EOF because we could deadlock with the mmap_sem | |
558 | * otherwise. We'll get another chance to drop them once the | |
559 | * last reference to the inode is dropped, so we'll never leak | |
560 | * blocks permanently. | |
561 | * | |
562 | * Further, check if the inode is being opened, written and | |
563 | * closed frequently and we have delayed allocation blocks | |
25985edc | 564 | * outstanding (e.g. streaming writes from the NFS server), |
6e857567 DC |
565 | * truncating the blocks past EOF will cause fragmentation to |
566 | * occur. | |
567 | * | |
568 | * In this case don't do the truncation, either, but we have to | |
569 | * be careful how we detect this case. Blocks beyond EOF show | |
570 | * up as i_delayed_blks even when the inode is clean, so we | |
571 | * need to truncate them away first before checking for a dirty | |
572 | * release. Hence on the first dirty close we will still remove | |
573 | * the speculative allocation, but after that we will leave it | |
574 | * in place. | |
575 | */ | |
576 | if (xfs_iflags_test(ip, XFS_IDIRTY_RELEASE)) | |
577 | return 0; | |
1da177e4 | 578 | |
6e857567 DC |
579 | error = xfs_free_eofblocks(mp, ip, |
580 | XFS_FREE_EOF_TRYLOCK); | |
581 | if (error) | |
582 | return error; | |
583 | ||
584 | /* delalloc blocks after truncation means it really is dirty */ | |
585 | if (ip->i_delayed_blks) | |
586 | xfs_iflags_set(ip, XFS_IDIRTY_RELEASE); | |
587 | } | |
1da177e4 LT |
588 | return 0; |
589 | } | |
590 | ||
591 | /* | |
592 | * xfs_inactive | |
593 | * | |
594 | * This is called when the vnode reference count for the vnode | |
595 | * goes to zero. If the file has been unlinked, then it must | |
596 | * now be truncated. Also, we clear all of the read-ahead state | |
597 | * kept for the inode here since the file is now closed. | |
598 | */ | |
993386c1 | 599 | int |
1da177e4 | 600 | xfs_inactive( |
993386c1 | 601 | xfs_inode_t *ip) |
1da177e4 | 602 | { |
67fcaa73 | 603 | xfs_bmap_free_t free_list; |
1da177e4 LT |
604 | xfs_fsblock_t first_block; |
605 | int committed; | |
606 | xfs_trans_t *tp; | |
607 | xfs_mount_t *mp; | |
608 | int error; | |
609 | int truncate; | |
610 | ||
1da177e4 LT |
611 | /* |
612 | * If the inode is already free, then there can be nothing | |
613 | * to clean up here. | |
614 | */ | |
cb4c8cc1 | 615 | if (ip->i_d.di_mode == 0 || is_bad_inode(VFS_I(ip))) { |
1da177e4 LT |
616 | ASSERT(ip->i_df.if_real_bytes == 0); |
617 | ASSERT(ip->i_df.if_broot_bytes == 0); | |
618 | return VN_INACTIVE_CACHE; | |
619 | } | |
620 | ||
621 | /* | |
622 | * Only do a truncate if it's a regular file with | |
623 | * some actual space in it. It's OK to look at the | |
624 | * inode's fields without the lock because we're the | |
625 | * only one with a reference to the inode. | |
626 | */ | |
627 | truncate = ((ip->i_d.di_nlink == 0) && | |
ba87ea69 LM |
628 | ((ip->i_d.di_size != 0) || (ip->i_size != 0) || |
629 | (ip->i_d.di_nextents > 0) || (ip->i_delayed_blks > 0)) && | |
abbede1b | 630 | S_ISREG(ip->i_d.di_mode)); |
1da177e4 LT |
631 | |
632 | mp = ip->i_mount; | |
633 | ||
1da177e4 LT |
634 | error = 0; |
635 | ||
636 | /* If this is a read-only mount, don't do this (would generate I/O) */ | |
bd186aa9 | 637 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
1da177e4 LT |
638 | goto out; |
639 | ||
640 | if (ip->i_d.di_nlink != 0) { | |
abbede1b | 641 | if ((S_ISREG(ip->i_d.di_mode) && |
df80c933 | 642 | ((ip->i_size > 0) || (VN_CACHED(VFS_I(ip)) > 0 || |
68bdb6ea | 643 | ip->i_delayed_blks > 0)) && |
dd9f438e NS |
644 | (ip->i_df.if_flags & XFS_IFEXTENTS) && |
645 | (!(ip->i_d.di_flags & | |
646 | (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)) || | |
647 | (ip->i_delayed_blks != 0)))) { | |
c56c9631 | 648 | error = xfs_free_eofblocks(mp, ip, 0); |
92dfe8d2 | 649 | if (error) |
014c2544 | 650 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
651 | } |
652 | goto out; | |
653 | } | |
654 | ||
655 | ASSERT(ip->i_d.di_nlink == 0); | |
656 | ||
7d095257 CH |
657 | error = xfs_qm_dqattach(ip, 0); |
658 | if (error) | |
014c2544 | 659 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
660 | |
661 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
662 | if (truncate) { | |
1da177e4 LT |
663 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
664 | ||
1da177e4 LT |
665 | error = xfs_trans_reserve(tp, 0, |
666 | XFS_ITRUNCATE_LOG_RES(mp), | |
667 | 0, XFS_TRANS_PERM_LOG_RES, | |
668 | XFS_ITRUNCATE_LOG_COUNT); | |
669 | if (error) { | |
670 | /* Don't call itruncate_cleanup */ | |
671 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
672 | xfs_trans_cancel(tp, 0); | |
673 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
014c2544 | 674 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
675 | } |
676 | ||
677 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
ddc3415a | 678 | xfs_trans_ijoin(tp, ip, 0); |
1da177e4 | 679 | |
673e8e59 CH |
680 | ip->i_d.di_size = 0; |
681 | ip->i_size = 0; | |
682 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
683 | ||
684 | error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, 0); | |
1da177e4 LT |
685 | if (error) { |
686 | xfs_trans_cancel(tp, | |
687 | XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
688 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
014c2544 | 689 | return VN_INACTIVE_CACHE; |
1da177e4 | 690 | } |
673e8e59 CH |
691 | |
692 | ASSERT(ip->i_d.di_nextents == 0); | |
abbede1b | 693 | } else if (S_ISLNK(ip->i_d.di_mode)) { |
1da177e4 LT |
694 | |
695 | /* | |
696 | * If we get an error while cleaning up a | |
697 | * symlink we bail out. | |
698 | */ | |
699 | error = (ip->i_d.di_size > XFS_IFORK_DSIZE(ip)) ? | |
700 | xfs_inactive_symlink_rmt(ip, &tp) : | |
701 | xfs_inactive_symlink_local(ip, &tp); | |
702 | ||
703 | if (error) { | |
704 | ASSERT(tp == NULL); | |
014c2544 | 705 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
706 | } |
707 | ||
ddc3415a | 708 | xfs_trans_ijoin(tp, ip, 0); |
1da177e4 LT |
709 | } else { |
710 | error = xfs_trans_reserve(tp, 0, | |
711 | XFS_IFREE_LOG_RES(mp), | |
712 | 0, XFS_TRANS_PERM_LOG_RES, | |
713 | XFS_INACTIVE_LOG_COUNT); | |
714 | if (error) { | |
715 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
716 | xfs_trans_cancel(tp, 0); | |
014c2544 | 717 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
718 | } |
719 | ||
720 | xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
ddc3415a | 721 | xfs_trans_ijoin(tp, ip, 0); |
1da177e4 LT |
722 | } |
723 | ||
724 | /* | |
725 | * If there are attributes associated with the file | |
726 | * then blow them away now. The code calls a routine | |
727 | * that recursively deconstructs the attribute fork. | |
728 | * We need to just commit the current transaction | |
729 | * because we can't use it for xfs_attr_inactive(). | |
730 | */ | |
731 | if (ip->i_d.di_anextents > 0) { | |
732 | error = xfs_inactive_attrs(ip, &tp); | |
733 | /* | |
734 | * If we got an error, the transaction is already | |
735 | * cancelled, and the inode is unlocked. Just get out. | |
736 | */ | |
737 | if (error) | |
014c2544 | 738 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
739 | } else if (ip->i_afp) { |
740 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); | |
741 | } | |
742 | ||
743 | /* | |
744 | * Free the inode. | |
745 | */ | |
9d87c319 | 746 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 LT |
747 | error = xfs_ifree(tp, ip, &free_list); |
748 | if (error) { | |
749 | /* | |
750 | * If we fail to free the inode, shut down. The cancel | |
751 | * might do that, we need to make sure. Otherwise the | |
752 | * inode might be lost for a long time or forever. | |
753 | */ | |
754 | if (!XFS_FORCED_SHUTDOWN(mp)) { | |
0b932ccc DC |
755 | xfs_notice(mp, "%s: xfs_ifree returned error %d", |
756 | __func__, error); | |
7d04a335 | 757 | xfs_force_shutdown(mp, SHUTDOWN_META_IO_ERROR); |
1da177e4 LT |
758 | } |
759 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); | |
760 | } else { | |
761 | /* | |
762 | * Credit the quota account(s). The inode is gone. | |
763 | */ | |
7d095257 | 764 | xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_ICOUNT, -1); |
1da177e4 LT |
765 | |
766 | /* | |
78e9da77 DC |
767 | * Just ignore errors at this point. There is nothing we can |
768 | * do except to try to keep going. Make sure it's not a silent | |
769 | * error. | |
1da177e4 | 770 | */ |
78e9da77 DC |
771 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
772 | if (error) | |
53487786 DC |
773 | xfs_notice(mp, "%s: xfs_bmap_finish returned error %d", |
774 | __func__, error); | |
78e9da77 DC |
775 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
776 | if (error) | |
53487786 DC |
777 | xfs_notice(mp, "%s: xfs_trans_commit returned error %d", |
778 | __func__, error); | |
1da177e4 | 779 | } |
7d095257 | 780 | |
1da177e4 LT |
781 | /* |
782 | * Release the dquots held by inode, if any. | |
783 | */ | |
7d095257 | 784 | xfs_qm_dqdetach(ip); |
1da177e4 LT |
785 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
786 | ||
787 | out: | |
788 | return VN_INACTIVE_CACHE; | |
789 | } | |
790 | ||
384f3ced BN |
791 | /* |
792 | * Lookups up an inode from "name". If ci_name is not NULL, then a CI match | |
793 | * is allowed, otherwise it has to be an exact match. If a CI match is found, | |
794 | * ci_name->name will point to a the actual name (caller must free) or | |
795 | * will be set to NULL if an exact match is found. | |
796 | */ | |
993386c1 | 797 | int |
1da177e4 | 798 | xfs_lookup( |
993386c1 | 799 | xfs_inode_t *dp, |
556b8b16 | 800 | struct xfs_name *name, |
384f3ced BN |
801 | xfs_inode_t **ipp, |
802 | struct xfs_name *ci_name) | |
1da177e4 | 803 | { |
eca450b7 | 804 | xfs_ino_t inum; |
1da177e4 LT |
805 | int error; |
806 | uint lock_mode; | |
1da177e4 | 807 | |
cca28fb8 | 808 | trace_xfs_lookup(dp, name); |
1da177e4 LT |
809 | |
810 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) | |
811 | return XFS_ERROR(EIO); | |
812 | ||
813 | lock_mode = xfs_ilock_map_shared(dp); | |
384f3ced | 814 | error = xfs_dir_lookup(NULL, dp, name, &inum, ci_name); |
1da177e4 | 815 | xfs_iunlock_map_shared(dp, lock_mode); |
eca450b7 CH |
816 | |
817 | if (error) | |
818 | goto out; | |
819 | ||
7b6259e7 | 820 | error = xfs_iget(dp->i_mount, NULL, inum, 0, 0, ipp); |
eca450b7 | 821 | if (error) |
384f3ced | 822 | goto out_free_name; |
eca450b7 | 823 | |
eca450b7 CH |
824 | return 0; |
825 | ||
384f3ced BN |
826 | out_free_name: |
827 | if (ci_name) | |
828 | kmem_free(ci_name->name); | |
829 | out: | |
eca450b7 | 830 | *ipp = NULL; |
1da177e4 LT |
831 | return error; |
832 | } | |
833 | ||
993386c1 | 834 | int |
1da177e4 | 835 | xfs_create( |
993386c1 | 836 | xfs_inode_t *dp, |
556b8b16 | 837 | struct xfs_name *name, |
576b1d67 | 838 | umode_t mode, |
3e5daf05 | 839 | xfs_dev_t rdev, |
6c77b0ea | 840 | xfs_inode_t **ipp) |
1da177e4 | 841 | { |
517b5e8c CH |
842 | int is_dir = S_ISDIR(mode); |
843 | struct xfs_mount *mp = dp->i_mount; | |
844 | struct xfs_inode *ip = NULL; | |
845 | struct xfs_trans *tp = NULL; | |
556b8b16 | 846 | int error; |
1da177e4 LT |
847 | xfs_bmap_free_t free_list; |
848 | xfs_fsblock_t first_block; | |
993386c1 | 849 | boolean_t unlock_dp_on_error = B_FALSE; |
1da177e4 LT |
850 | uint cancel_flags; |
851 | int committed; | |
6743099c | 852 | prid_t prid; |
517b5e8c CH |
853 | struct xfs_dquot *udqp = NULL; |
854 | struct xfs_dquot *gdqp = NULL; | |
1da177e4 | 855 | uint resblks; |
517b5e8c CH |
856 | uint log_res; |
857 | uint log_count; | |
1da177e4 | 858 | |
cca28fb8 | 859 | trace_xfs_create(dp, name); |
1da177e4 | 860 | |
517b5e8c CH |
861 | if (XFS_FORCED_SHUTDOWN(mp)) |
862 | return XFS_ERROR(EIO); | |
863 | ||
365ca83d | 864 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
6743099c | 865 | prid = xfs_get_projid(dp); |
1da177e4 | 866 | else |
6743099c | 867 | prid = XFS_PROJID_DEFAULT; |
1da177e4 LT |
868 | |
869 | /* | |
870 | * Make sure that we have allocated dquot(s) on disk. | |
871 | */ | |
7d095257 | 872 | error = xfs_qm_vop_dqalloc(dp, current_fsuid(), current_fsgid(), prid, |
517b5e8c | 873 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
1da177e4 | 874 | if (error) |
ec3ba85f | 875 | return error; |
1da177e4 | 876 | |
517b5e8c CH |
877 | if (is_dir) { |
878 | rdev = 0; | |
879 | resblks = XFS_MKDIR_SPACE_RES(mp, name->len); | |
880 | log_res = XFS_MKDIR_LOG_RES(mp); | |
881 | log_count = XFS_MKDIR_LOG_COUNT; | |
882 | tp = xfs_trans_alloc(mp, XFS_TRANS_MKDIR); | |
883 | } else { | |
884 | resblks = XFS_CREATE_SPACE_RES(mp, name->len); | |
885 | log_res = XFS_CREATE_LOG_RES(mp); | |
886 | log_count = XFS_CREATE_LOG_COUNT; | |
887 | tp = xfs_trans_alloc(mp, XFS_TRANS_CREATE); | |
888 | } | |
1da177e4 | 889 | |
1da177e4 | 890 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
517b5e8c | 891 | |
1da177e4 LT |
892 | /* |
893 | * Initially assume that the file does not exist and | |
894 | * reserve the resources for that case. If that is not | |
895 | * the case we'll drop the one we have and get a more | |
896 | * appropriate transaction later. | |
897 | */ | |
517b5e8c CH |
898 | error = xfs_trans_reserve(tp, resblks, log_res, 0, |
899 | XFS_TRANS_PERM_LOG_RES, log_count); | |
1da177e4 | 900 | if (error == ENOSPC) { |
153fec43 DC |
901 | /* flush outstanding delalloc blocks and retry */ |
902 | xfs_flush_inodes(dp); | |
4734d401 CH |
903 | error = xfs_trans_reserve(tp, resblks, log_res, 0, |
904 | XFS_TRANS_PERM_LOG_RES, log_count); | |
153fec43 DC |
905 | } |
906 | if (error == ENOSPC) { | |
907 | /* No space at all so try a "no-allocation" reservation */ | |
1da177e4 | 908 | resblks = 0; |
517b5e8c CH |
909 | error = xfs_trans_reserve(tp, 0, log_res, 0, |
910 | XFS_TRANS_PERM_LOG_RES, log_count); | |
1da177e4 LT |
911 | } |
912 | if (error) { | |
913 | cancel_flags = 0; | |
517b5e8c | 914 | goto out_trans_cancel; |
1da177e4 LT |
915 | } |
916 | ||
f7c66ce3 | 917 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
993386c1 | 918 | unlock_dp_on_error = B_TRUE; |
1da177e4 | 919 | |
517b5e8c CH |
920 | /* |
921 | * Check for directory link count overflow. | |
922 | */ | |
923 | if (is_dir && dp->i_d.di_nlink >= XFS_MAXLINK) { | |
924 | error = XFS_ERROR(EMLINK); | |
925 | goto out_trans_cancel; | |
926 | } | |
1da177e4 | 927 | |
517b5e8c | 928 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 LT |
929 | |
930 | /* | |
931 | * Reserve disk quota and the inode. | |
932 | */ | |
7d095257 | 933 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, resblks, 1, 0); |
1da177e4 | 934 | if (error) |
517b5e8c | 935 | goto out_trans_cancel; |
1da177e4 | 936 | |
556b8b16 BN |
937 | error = xfs_dir_canenter(tp, dp, name, resblks); |
938 | if (error) | |
517b5e8c CH |
939 | goto out_trans_cancel; |
940 | ||
941 | /* | |
942 | * A newly created regular or special file just has one directory | |
943 | * entry pointing to them, but a directory also the "." entry | |
944 | * pointing to itself. | |
945 | */ | |
6c77b0ea | 946 | error = xfs_dir_ialloc(&tp, dp, mode, is_dir ? 2 : 1, rdev, |
517b5e8c | 947 | prid, resblks > 0, &ip, &committed); |
1da177e4 LT |
948 | if (error) { |
949 | if (error == ENOSPC) | |
517b5e8c CH |
950 | goto out_trans_cancel; |
951 | goto out_trans_abort; | |
1da177e4 | 952 | } |
1da177e4 | 953 | |
1da177e4 | 954 | /* |
993386c1 CH |
955 | * Now we join the directory inode to the transaction. We do not do it |
956 | * earlier because xfs_dir_ialloc might commit the previous transaction | |
957 | * (and release all the locks). An error from here on will result in | |
958 | * the transaction cancel unlocking dp so don't do it explicitly in the | |
959 | * error path. | |
1da177e4 | 960 | */ |
ddc3415a | 961 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
993386c1 | 962 | unlock_dp_on_error = B_FALSE; |
1da177e4 | 963 | |
556b8b16 | 964 | error = xfs_dir_createname(tp, dp, name, ip->i_ino, |
f6c2d1fa NS |
965 | &first_block, &free_list, resblks ? |
966 | resblks - XFS_IALLOC_SPACE_RES(mp) : 0); | |
1da177e4 LT |
967 | if (error) { |
968 | ASSERT(error != ENOSPC); | |
517b5e8c | 969 | goto out_trans_abort; |
1da177e4 | 970 | } |
dcd79a14 | 971 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1da177e4 LT |
972 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); |
973 | ||
517b5e8c CH |
974 | if (is_dir) { |
975 | error = xfs_dir_init(tp, ip, dp); | |
976 | if (error) | |
977 | goto out_bmap_cancel; | |
978 | ||
979 | error = xfs_bumplink(tp, dp); | |
980 | if (error) | |
981 | goto out_bmap_cancel; | |
982 | } | |
983 | ||
1da177e4 LT |
984 | /* |
985 | * If this is a synchronous mount, make sure that the | |
986 | * create transaction goes to disk before returning to | |
987 | * the user. | |
988 | */ | |
517b5e8c | 989 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) |
1da177e4 | 990 | xfs_trans_set_sync(tp); |
1da177e4 | 991 | |
1da177e4 LT |
992 | /* |
993 | * Attach the dquot(s) to the inodes and modify them incore. | |
994 | * These ids of the inode couldn't have changed since the new | |
995 | * inode has been locked ever since it was created. | |
996 | */ | |
7d095257 | 997 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp); |
1da177e4 | 998 | |
f7c99b6f | 999 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
517b5e8c | 1000 | if (error) |
ec3ba85f | 1001 | goto out_bmap_cancel; |
1da177e4 | 1002 | |
1c72bf90 | 1003 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
ec3ba85f CH |
1004 | if (error) |
1005 | goto out_release_inode; | |
1da177e4 | 1006 | |
7d095257 CH |
1007 | xfs_qm_dqrele(udqp); |
1008 | xfs_qm_dqrele(gdqp); | |
1da177e4 | 1009 | |
979ebab1 | 1010 | *ipp = ip; |
288699fe | 1011 | return 0; |
1da177e4 | 1012 | |
517b5e8c CH |
1013 | out_bmap_cancel: |
1014 | xfs_bmap_cancel(&free_list); | |
1015 | out_trans_abort: | |
1da177e4 | 1016 | cancel_flags |= XFS_TRANS_ABORT; |
517b5e8c CH |
1017 | out_trans_cancel: |
1018 | xfs_trans_cancel(tp, cancel_flags); | |
ec3ba85f CH |
1019 | out_release_inode: |
1020 | /* | |
1021 | * Wait until after the current transaction is aborted to | |
1022 | * release the inode. This prevents recursive transactions | |
1023 | * and deadlocks from xfs_inactive. | |
1024 | */ | |
1025 | if (ip) | |
1026 | IRELE(ip); | |
1027 | ||
7d095257 CH |
1028 | xfs_qm_dqrele(udqp); |
1029 | xfs_qm_dqrele(gdqp); | |
1da177e4 | 1030 | |
993386c1 CH |
1031 | if (unlock_dp_on_error) |
1032 | xfs_iunlock(dp, XFS_ILOCK_EXCL); | |
288699fe | 1033 | return error; |
1da177e4 LT |
1034 | } |
1035 | ||
1da177e4 LT |
1036 | #ifdef DEBUG |
1037 | int xfs_locked_n; | |
1038 | int xfs_small_retries; | |
1039 | int xfs_middle_retries; | |
1040 | int xfs_lots_retries; | |
1041 | int xfs_lock_delays; | |
1042 | #endif | |
1043 | ||
f7c66ce3 LM |
1044 | /* |
1045 | * Bump the subclass so xfs_lock_inodes() acquires each lock with | |
1046 | * a different value | |
1047 | */ | |
1048 | static inline int | |
1049 | xfs_lock_inumorder(int lock_mode, int subclass) | |
1050 | { | |
1051 | if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) | |
0f1145cc | 1052 | lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_IOLOCK_SHIFT; |
f7c66ce3 | 1053 | if (lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) |
0f1145cc | 1054 | lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_ILOCK_SHIFT; |
f7c66ce3 LM |
1055 | |
1056 | return lock_mode; | |
1057 | } | |
1058 | ||
1da177e4 LT |
1059 | /* |
1060 | * The following routine will lock n inodes in exclusive mode. | |
1061 | * We assume the caller calls us with the inodes in i_ino order. | |
1062 | * | |
1063 | * We need to detect deadlock where an inode that we lock | |
1064 | * is in the AIL and we start waiting for another inode that is locked | |
1065 | * by a thread in a long running transaction (such as truncate). This can | |
1066 | * result in deadlock since the long running trans might need to wait | |
1067 | * for the inode we just locked in order to push the tail and free space | |
1068 | * in the log. | |
1069 | */ | |
1070 | void | |
1071 | xfs_lock_inodes( | |
1072 | xfs_inode_t **ips, | |
1073 | int inodes, | |
1da177e4 LT |
1074 | uint lock_mode) |
1075 | { | |
1076 | int attempts = 0, i, j, try_lock; | |
1077 | xfs_log_item_t *lp; | |
1078 | ||
1079 | ASSERT(ips && (inodes >= 2)); /* we need at least two */ | |
1080 | ||
cfa853e4 CH |
1081 | try_lock = 0; |
1082 | i = 0; | |
1da177e4 LT |
1083 | |
1084 | again: | |
1085 | for (; i < inodes; i++) { | |
1086 | ASSERT(ips[i]); | |
1087 | ||
1088 | if (i && (ips[i] == ips[i-1])) /* Already locked */ | |
1089 | continue; | |
1090 | ||
1091 | /* | |
1092 | * If try_lock is not set yet, make sure all locked inodes | |
1093 | * are not in the AIL. | |
1094 | * If any are, set try_lock to be used later. | |
1095 | */ | |
1096 | ||
1097 | if (!try_lock) { | |
1098 | for (j = (i - 1); j >= 0 && !try_lock; j--) { | |
1099 | lp = (xfs_log_item_t *)ips[j]->i_itemp; | |
1100 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { | |
1101 | try_lock++; | |
1102 | } | |
1103 | } | |
1104 | } | |
1105 | ||
1106 | /* | |
1107 | * If any of the previous locks we have locked is in the AIL, | |
1108 | * we must TRY to get the second and subsequent locks. If | |
1109 | * we can't get any, we must release all we have | |
1110 | * and try again. | |
1111 | */ | |
1112 | ||
1113 | if (try_lock) { | |
1114 | /* try_lock must be 0 if i is 0. */ | |
1115 | /* | |
1116 | * try_lock means we have an inode locked | |
1117 | * that is in the AIL. | |
1118 | */ | |
1119 | ASSERT(i != 0); | |
f7c66ce3 | 1120 | if (!xfs_ilock_nowait(ips[i], xfs_lock_inumorder(lock_mode, i))) { |
1da177e4 LT |
1121 | attempts++; |
1122 | ||
1123 | /* | |
1124 | * Unlock all previous guys and try again. | |
1125 | * xfs_iunlock will try to push the tail | |
1126 | * if the inode is in the AIL. | |
1127 | */ | |
1128 | ||
1129 | for(j = i - 1; j >= 0; j--) { | |
1130 | ||
1131 | /* | |
1132 | * Check to see if we've already | |
1133 | * unlocked this one. | |
1134 | * Not the first one going back, | |
1135 | * and the inode ptr is the same. | |
1136 | */ | |
1137 | if ((j != (i - 1)) && ips[j] == | |
1138 | ips[j+1]) | |
1139 | continue; | |
1140 | ||
1141 | xfs_iunlock(ips[j], lock_mode); | |
1142 | } | |
1143 | ||
1144 | if ((attempts % 5) == 0) { | |
1145 | delay(1); /* Don't just spin the CPU */ | |
1146 | #ifdef DEBUG | |
1147 | xfs_lock_delays++; | |
1148 | #endif | |
1149 | } | |
1150 | i = 0; | |
1151 | try_lock = 0; | |
1152 | goto again; | |
1153 | } | |
1154 | } else { | |
f7c66ce3 | 1155 | xfs_ilock(ips[i], xfs_lock_inumorder(lock_mode, i)); |
1da177e4 LT |
1156 | } |
1157 | } | |
1158 | ||
1159 | #ifdef DEBUG | |
1160 | if (attempts) { | |
1161 | if (attempts < 5) xfs_small_retries++; | |
1162 | else if (attempts < 100) xfs_middle_retries++; | |
1163 | else xfs_lots_retries++; | |
1164 | } else { | |
1165 | xfs_locked_n++; | |
1166 | } | |
1167 | #endif | |
1168 | } | |
1169 | ||
f9114eba DC |
1170 | /* |
1171 | * xfs_lock_two_inodes() can only be used to lock one type of lock | |
1172 | * at a time - the iolock or the ilock, but not both at once. If | |
1173 | * we lock both at once, lockdep will report false positives saying | |
1174 | * we have violated locking orders. | |
1175 | */ | |
e1cccd91 CH |
1176 | void |
1177 | xfs_lock_two_inodes( | |
1178 | xfs_inode_t *ip0, | |
1179 | xfs_inode_t *ip1, | |
1180 | uint lock_mode) | |
1181 | { | |
1182 | xfs_inode_t *temp; | |
1183 | int attempts = 0; | |
1184 | xfs_log_item_t *lp; | |
1185 | ||
f9114eba DC |
1186 | if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) |
1187 | ASSERT((lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) == 0); | |
e1cccd91 CH |
1188 | ASSERT(ip0->i_ino != ip1->i_ino); |
1189 | ||
1190 | if (ip0->i_ino > ip1->i_ino) { | |
1191 | temp = ip0; | |
1192 | ip0 = ip1; | |
1193 | ip1 = temp; | |
1194 | } | |
1195 | ||
1196 | again: | |
1197 | xfs_ilock(ip0, xfs_lock_inumorder(lock_mode, 0)); | |
1198 | ||
1199 | /* | |
1200 | * If the first lock we have locked is in the AIL, we must TRY to get | |
1201 | * the second lock. If we can't get it, we must release the first one | |
1202 | * and try again. | |
1203 | */ | |
1204 | lp = (xfs_log_item_t *)ip0->i_itemp; | |
1205 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { | |
1206 | if (!xfs_ilock_nowait(ip1, xfs_lock_inumorder(lock_mode, 1))) { | |
1207 | xfs_iunlock(ip0, lock_mode); | |
1208 | if ((++attempts % 5) == 0) | |
1209 | delay(1); /* Don't just spin the CPU */ | |
1210 | goto again; | |
1211 | } | |
1212 | } else { | |
1213 | xfs_ilock(ip1, xfs_lock_inumorder(lock_mode, 1)); | |
1214 | } | |
1215 | } | |
1216 | ||
993386c1 | 1217 | int |
1da177e4 | 1218 | xfs_remove( |
993386c1 | 1219 | xfs_inode_t *dp, |
556b8b16 BN |
1220 | struct xfs_name *name, |
1221 | xfs_inode_t *ip) | |
1da177e4 | 1222 | { |
993386c1 | 1223 | xfs_mount_t *mp = dp->i_mount; |
1da177e4 | 1224 | xfs_trans_t *tp = NULL; |
8f112e3b | 1225 | int is_dir = S_ISDIR(ip->i_d.di_mode); |
1da177e4 LT |
1226 | int error = 0; |
1227 | xfs_bmap_free_t free_list; | |
1228 | xfs_fsblock_t first_block; | |
1229 | int cancel_flags; | |
1230 | int committed; | |
1da177e4 LT |
1231 | int link_zero; |
1232 | uint resblks; | |
8f112e3b | 1233 | uint log_count; |
1da177e4 | 1234 | |
cca28fb8 | 1235 | trace_xfs_remove(dp, name); |
1da177e4 | 1236 | |
1da177e4 LT |
1237 | if (XFS_FORCED_SHUTDOWN(mp)) |
1238 | return XFS_ERROR(EIO); | |
1239 | ||
7d095257 | 1240 | error = xfs_qm_dqattach(dp, 0); |
8f112e3b CH |
1241 | if (error) |
1242 | goto std_return; | |
1243 | ||
7d095257 | 1244 | error = xfs_qm_dqattach(ip, 0); |
8f112e3b | 1245 | if (error) |
1da177e4 | 1246 | goto std_return; |
1da177e4 | 1247 | |
8f112e3b CH |
1248 | if (is_dir) { |
1249 | tp = xfs_trans_alloc(mp, XFS_TRANS_RMDIR); | |
1250 | log_count = XFS_DEFAULT_LOG_COUNT; | |
1251 | } else { | |
1252 | tp = xfs_trans_alloc(mp, XFS_TRANS_REMOVE); | |
1253 | log_count = XFS_REMOVE_LOG_COUNT; | |
1254 | } | |
1da177e4 | 1255 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
8f112e3b | 1256 | |
1da177e4 LT |
1257 | /* |
1258 | * We try to get the real space reservation first, | |
1259 | * allowing for directory btree deletion(s) implying | |
1260 | * possible bmap insert(s). If we can't get the space | |
1261 | * reservation then we use 0 instead, and avoid the bmap | |
1262 | * btree insert(s) in the directory code by, if the bmap | |
1263 | * insert tries to happen, instead trimming the LAST | |
1264 | * block from the directory. | |
1265 | */ | |
1266 | resblks = XFS_REMOVE_SPACE_RES(mp); | |
1267 | error = xfs_trans_reserve(tp, resblks, XFS_REMOVE_LOG_RES(mp), 0, | |
8f112e3b | 1268 | XFS_TRANS_PERM_LOG_RES, log_count); |
1da177e4 LT |
1269 | if (error == ENOSPC) { |
1270 | resblks = 0; | |
1271 | error = xfs_trans_reserve(tp, 0, XFS_REMOVE_LOG_RES(mp), 0, | |
8f112e3b | 1272 | XFS_TRANS_PERM_LOG_RES, log_count); |
1da177e4 LT |
1273 | } |
1274 | if (error) { | |
1275 | ASSERT(error != ENOSPC); | |
8f112e3b CH |
1276 | cancel_flags = 0; |
1277 | goto out_trans_cancel; | |
1da177e4 LT |
1278 | } |
1279 | ||
e1cccd91 | 1280 | xfs_lock_two_inodes(dp, ip, XFS_ILOCK_EXCL); |
1da177e4 | 1281 | |
ddc3415a CH |
1282 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
1283 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
1da177e4 | 1284 | |
8f112e3b CH |
1285 | /* |
1286 | * If we're removing a directory perform some additional validation. | |
1287 | */ | |
1288 | if (is_dir) { | |
1289 | ASSERT(ip->i_d.di_nlink >= 2); | |
1290 | if (ip->i_d.di_nlink != 2) { | |
1291 | error = XFS_ERROR(ENOTEMPTY); | |
1292 | goto out_trans_cancel; | |
1293 | } | |
1294 | if (!xfs_dir_isempty(ip)) { | |
1295 | error = XFS_ERROR(ENOTEMPTY); | |
1296 | goto out_trans_cancel; | |
1297 | } | |
1298 | } | |
1299 | ||
9d87c319 | 1300 | xfs_bmap_init(&free_list, &first_block); |
556b8b16 | 1301 | error = xfs_dir_removename(tp, dp, name, ip->i_ino, |
d4377d84 | 1302 | &first_block, &free_list, resblks); |
1da177e4 LT |
1303 | if (error) { |
1304 | ASSERT(error != ENOENT); | |
8f112e3b | 1305 | goto out_bmap_cancel; |
1da177e4 | 1306 | } |
dcd79a14 | 1307 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1da177e4 | 1308 | |
8f112e3b CH |
1309 | if (is_dir) { |
1310 | /* | |
1311 | * Drop the link from ip's "..". | |
1312 | */ | |
1313 | error = xfs_droplink(tp, dp); | |
1314 | if (error) | |
1315 | goto out_bmap_cancel; | |
1316 | ||
1317 | /* | |
2b7035fd | 1318 | * Drop the "." link from ip to self. |
8f112e3b CH |
1319 | */ |
1320 | error = xfs_droplink(tp, ip); | |
1321 | if (error) | |
1322 | goto out_bmap_cancel; | |
1323 | } else { | |
1324 | /* | |
1325 | * When removing a non-directory we need to log the parent | |
26c52951 DC |
1326 | * inode here. For a directory this is done implicitly |
1327 | * by the xfs_droplink call for the ".." entry. | |
8f112e3b CH |
1328 | */ |
1329 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
1da177e4 LT |
1330 | } |
1331 | ||
8f112e3b | 1332 | /* |
2b7035fd | 1333 | * Drop the link from dp to ip. |
8f112e3b CH |
1334 | */ |
1335 | error = xfs_droplink(tp, ip); | |
1336 | if (error) | |
1337 | goto out_bmap_cancel; | |
1338 | ||
1339 | /* | |
1340 | * Determine if this is the last link while | |
1da177e4 LT |
1341 | * we are in the transaction. |
1342 | */ | |
8f112e3b | 1343 | link_zero = (ip->i_d.di_nlink == 0); |
1da177e4 | 1344 | |
1da177e4 LT |
1345 | /* |
1346 | * If this is a synchronous mount, make sure that the | |
1347 | * remove transaction goes to disk before returning to | |
1348 | * the user. | |
1349 | */ | |
8f112e3b | 1350 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) |
1da177e4 | 1351 | xfs_trans_set_sync(tp); |
1da177e4 | 1352 | |
f7c99b6f | 1353 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
8f112e3b CH |
1354 | if (error) |
1355 | goto out_bmap_cancel; | |
1da177e4 | 1356 | |
1c72bf90 | 1357 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
5df78e73 | 1358 | if (error) |
1da177e4 | 1359 | goto std_return; |
1da177e4 | 1360 | |
2a82b8be DC |
1361 | /* |
1362 | * If we are using filestreams, kill the stream association. | |
1363 | * If the file is still open it may get a new one but that | |
1364 | * will get killed on last close in xfs_close() so we don't | |
1365 | * have to worry about that. | |
1366 | */ | |
8f112e3b | 1367 | if (!is_dir && link_zero && xfs_inode_is_filestream(ip)) |
2a82b8be DC |
1368 | xfs_filestream_deassociate(ip); |
1369 | ||
288699fe | 1370 | return 0; |
1da177e4 | 1371 | |
8f112e3b | 1372 | out_bmap_cancel: |
1da177e4 LT |
1373 | xfs_bmap_cancel(&free_list); |
1374 | cancel_flags |= XFS_TRANS_ABORT; | |
8f112e3b | 1375 | out_trans_cancel: |
1da177e4 | 1376 | xfs_trans_cancel(tp, cancel_flags); |
288699fe CH |
1377 | std_return: |
1378 | return error; | |
1da177e4 LT |
1379 | } |
1380 | ||
993386c1 | 1381 | int |
1da177e4 | 1382 | xfs_link( |
993386c1 | 1383 | xfs_inode_t *tdp, |
a3da7896 | 1384 | xfs_inode_t *sip, |
556b8b16 | 1385 | struct xfs_name *target_name) |
1da177e4 | 1386 | { |
993386c1 | 1387 | xfs_mount_t *mp = tdp->i_mount; |
1da177e4 | 1388 | xfs_trans_t *tp; |
1da177e4 LT |
1389 | int error; |
1390 | xfs_bmap_free_t free_list; | |
1391 | xfs_fsblock_t first_block; | |
1392 | int cancel_flags; | |
1393 | int committed; | |
1da177e4 | 1394 | int resblks; |
1da177e4 | 1395 | |
cca28fb8 | 1396 | trace_xfs_link(tdp, target_name); |
1da177e4 | 1397 | |
a3da7896 | 1398 | ASSERT(!S_ISDIR(sip->i_d.di_mode)); |
1da177e4 | 1399 | |
1da177e4 LT |
1400 | if (XFS_FORCED_SHUTDOWN(mp)) |
1401 | return XFS_ERROR(EIO); | |
1402 | ||
7d095257 | 1403 | error = xfs_qm_dqattach(sip, 0); |
cb3f35bb CH |
1404 | if (error) |
1405 | goto std_return; | |
1406 | ||
7d095257 | 1407 | error = xfs_qm_dqattach(tdp, 0); |
1da177e4 LT |
1408 | if (error) |
1409 | goto std_return; | |
1410 | ||
1411 | tp = xfs_trans_alloc(mp, XFS_TRANS_LINK); | |
1412 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
556b8b16 | 1413 | resblks = XFS_LINK_SPACE_RES(mp, target_name->len); |
1da177e4 LT |
1414 | error = xfs_trans_reserve(tp, resblks, XFS_LINK_LOG_RES(mp), 0, |
1415 | XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); | |
1416 | if (error == ENOSPC) { | |
1417 | resblks = 0; | |
1418 | error = xfs_trans_reserve(tp, 0, XFS_LINK_LOG_RES(mp), 0, | |
1419 | XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); | |
1420 | } | |
1421 | if (error) { | |
1422 | cancel_flags = 0; | |
1423 | goto error_return; | |
1424 | } | |
1425 | ||
e1cccd91 | 1426 | xfs_lock_two_inodes(sip, tdp, XFS_ILOCK_EXCL); |
1da177e4 | 1427 | |
ddc3415a CH |
1428 | xfs_trans_ijoin(tp, sip, XFS_ILOCK_EXCL); |
1429 | xfs_trans_ijoin(tp, tdp, XFS_ILOCK_EXCL); | |
1da177e4 LT |
1430 | |
1431 | /* | |
1432 | * If the source has too many links, we can't make any more to it. | |
1433 | */ | |
1434 | if (sip->i_d.di_nlink >= XFS_MAXLINK) { | |
1435 | error = XFS_ERROR(EMLINK); | |
1436 | goto error_return; | |
1437 | } | |
1438 | ||
365ca83d NS |
1439 | /* |
1440 | * If we are using project inheritance, we only allow hard link | |
1441 | * creation in our tree when the project IDs are the same; else | |
1442 | * the tree quota mechanism could be circumvented. | |
1443 | */ | |
1444 | if (unlikely((tdp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && | |
6743099c | 1445 | (xfs_get_projid(tdp) != xfs_get_projid(sip)))) { |
b1ecdda9 | 1446 | error = XFS_ERROR(EXDEV); |
365ca83d NS |
1447 | goto error_return; |
1448 | } | |
1449 | ||
556b8b16 BN |
1450 | error = xfs_dir_canenter(tp, tdp, target_name, resblks); |
1451 | if (error) | |
1da177e4 LT |
1452 | goto error_return; |
1453 | ||
9d87c319 | 1454 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 | 1455 | |
556b8b16 BN |
1456 | error = xfs_dir_createname(tp, tdp, target_name, sip->i_ino, |
1457 | &first_block, &free_list, resblks); | |
1da177e4 LT |
1458 | if (error) |
1459 | goto abort_return; | |
dcd79a14 | 1460 | xfs_trans_ichgtime(tp, tdp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1da177e4 LT |
1461 | xfs_trans_log_inode(tp, tdp, XFS_ILOG_CORE); |
1462 | ||
1463 | error = xfs_bumplink(tp, sip); | |
b71d300c | 1464 | if (error) |
1da177e4 | 1465 | goto abort_return; |
1da177e4 LT |
1466 | |
1467 | /* | |
1468 | * If this is a synchronous mount, make sure that the | |
1469 | * link transaction goes to disk before returning to | |
1470 | * the user. | |
1471 | */ | |
1472 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
1473 | xfs_trans_set_sync(tp); | |
1474 | } | |
1475 | ||
f7c99b6f | 1476 | error = xfs_bmap_finish (&tp, &free_list, &committed); |
1da177e4 LT |
1477 | if (error) { |
1478 | xfs_bmap_cancel(&free_list); | |
1479 | goto abort_return; | |
1480 | } | |
1481 | ||
288699fe | 1482 | return xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
1483 | |
1484 | abort_return: | |
1485 | cancel_flags |= XFS_TRANS_ABORT; | |
1da177e4 LT |
1486 | error_return: |
1487 | xfs_trans_cancel(tp, cancel_flags); | |
288699fe CH |
1488 | std_return: |
1489 | return error; | |
1da177e4 | 1490 | } |
b71d300c | 1491 | |
993386c1 | 1492 | int |
1da177e4 | 1493 | xfs_symlink( |
993386c1 | 1494 | xfs_inode_t *dp, |
556b8b16 BN |
1495 | struct xfs_name *link_name, |
1496 | const char *target_path, | |
576b1d67 | 1497 | umode_t mode, |
6c77b0ea | 1498 | xfs_inode_t **ipp) |
1da177e4 | 1499 | { |
993386c1 | 1500 | xfs_mount_t *mp = dp->i_mount; |
1da177e4 | 1501 | xfs_trans_t *tp; |
1da177e4 LT |
1502 | xfs_inode_t *ip; |
1503 | int error; | |
1504 | int pathlen; | |
1505 | xfs_bmap_free_t free_list; | |
1506 | xfs_fsblock_t first_block; | |
993386c1 | 1507 | boolean_t unlock_dp_on_error = B_FALSE; |
1da177e4 LT |
1508 | uint cancel_flags; |
1509 | int committed; | |
1510 | xfs_fileoff_t first_fsb; | |
1511 | xfs_filblks_t fs_blocks; | |
1512 | int nmaps; | |
1513 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; | |
1514 | xfs_daddr_t d; | |
556b8b16 | 1515 | const char *cur_chunk; |
1da177e4 LT |
1516 | int byte_cnt; |
1517 | int n; | |
1518 | xfs_buf_t *bp; | |
6743099c | 1519 | prid_t prid; |
1da177e4 LT |
1520 | struct xfs_dquot *udqp, *gdqp; |
1521 | uint resblks; | |
1da177e4 | 1522 | |
3937be5b | 1523 | *ipp = NULL; |
1da177e4 LT |
1524 | error = 0; |
1525 | ip = NULL; | |
1526 | tp = NULL; | |
1527 | ||
cca28fb8 | 1528 | trace_xfs_symlink(dp, link_name); |
1da177e4 LT |
1529 | |
1530 | if (XFS_FORCED_SHUTDOWN(mp)) | |
1531 | return XFS_ERROR(EIO); | |
1532 | ||
1da177e4 LT |
1533 | /* |
1534 | * Check component lengths of the target path name. | |
1535 | */ | |
1536 | pathlen = strlen(target_path); | |
1537 | if (pathlen >= MAXPATHLEN) /* total string too long */ | |
1538 | return XFS_ERROR(ENAMETOOLONG); | |
1da177e4 | 1539 | |
1da177e4 | 1540 | udqp = gdqp = NULL; |
365ca83d | 1541 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
6743099c | 1542 | prid = xfs_get_projid(dp); |
1da177e4 | 1543 | else |
6743099c | 1544 | prid = XFS_PROJID_DEFAULT; |
1da177e4 LT |
1545 | |
1546 | /* | |
1547 | * Make sure that we have allocated dquot(s) on disk. | |
1548 | */ | |
7d095257 | 1549 | error = xfs_qm_vop_dqalloc(dp, current_fsuid(), current_fsgid(), prid, |
1da177e4 LT |
1550 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
1551 | if (error) | |
1552 | goto std_return; | |
1553 | ||
1554 | tp = xfs_trans_alloc(mp, XFS_TRANS_SYMLINK); | |
1555 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
1556 | /* | |
1557 | * The symlink will fit into the inode data fork? | |
1558 | * There can't be any attributes so we get the whole variable part. | |
1559 | */ | |
1560 | if (pathlen <= XFS_LITINO(mp)) | |
1561 | fs_blocks = 0; | |
1562 | else | |
1563 | fs_blocks = XFS_B_TO_FSB(mp, pathlen); | |
556b8b16 | 1564 | resblks = XFS_SYMLINK_SPACE_RES(mp, link_name->len, fs_blocks); |
1da177e4 LT |
1565 | error = xfs_trans_reserve(tp, resblks, XFS_SYMLINK_LOG_RES(mp), 0, |
1566 | XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT); | |
1567 | if (error == ENOSPC && fs_blocks == 0) { | |
1568 | resblks = 0; | |
1569 | error = xfs_trans_reserve(tp, 0, XFS_SYMLINK_LOG_RES(mp), 0, | |
1570 | XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT); | |
1571 | } | |
1572 | if (error) { | |
1573 | cancel_flags = 0; | |
1da177e4 LT |
1574 | goto error_return; |
1575 | } | |
1576 | ||
f7c66ce3 | 1577 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
993386c1 | 1578 | unlock_dp_on_error = B_TRUE; |
1da177e4 LT |
1579 | |
1580 | /* | |
1581 | * Check whether the directory allows new symlinks or not. | |
1582 | */ | |
1583 | if (dp->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) { | |
1584 | error = XFS_ERROR(EPERM); | |
1585 | goto error_return; | |
1586 | } | |
1587 | ||
1588 | /* | |
1589 | * Reserve disk quota : blocks and inode. | |
1590 | */ | |
7d095257 | 1591 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, resblks, 1, 0); |
1da177e4 LT |
1592 | if (error) |
1593 | goto error_return; | |
1594 | ||
1595 | /* | |
1596 | * Check for ability to enter directory entry, if no space reserved. | |
1597 | */ | |
556b8b16 BN |
1598 | error = xfs_dir_canenter(tp, dp, link_name, resblks); |
1599 | if (error) | |
1da177e4 LT |
1600 | goto error_return; |
1601 | /* | |
1602 | * Initialize the bmap freelist prior to calling either | |
1603 | * bmapi or the directory create code. | |
1604 | */ | |
9d87c319 | 1605 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 LT |
1606 | |
1607 | /* | |
1608 | * Allocate an inode for the symlink. | |
1609 | */ | |
6c77b0ea CH |
1610 | error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (mode & ~S_IFMT), 1, 0, |
1611 | prid, resblks > 0, &ip, NULL); | |
1da177e4 LT |
1612 | if (error) { |
1613 | if (error == ENOSPC) | |
1614 | goto error_return; | |
1615 | goto error1; | |
1616 | } | |
1da177e4 | 1617 | |
993386c1 CH |
1618 | /* |
1619 | * An error after we've joined dp to the transaction will result in the | |
1620 | * transaction cancel unlocking dp so don't do it explicitly in the | |
1621 | * error path. | |
1622 | */ | |
ddc3415a | 1623 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
993386c1 | 1624 | unlock_dp_on_error = B_FALSE; |
1da177e4 LT |
1625 | |
1626 | /* | |
1627 | * Also attach the dquot(s) to it, if applicable. | |
1628 | */ | |
7d095257 | 1629 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp); |
1da177e4 LT |
1630 | |
1631 | if (resblks) | |
1632 | resblks -= XFS_IALLOC_SPACE_RES(mp); | |
1633 | /* | |
1634 | * If the symlink will fit into the inode, write it inline. | |
1635 | */ | |
1636 | if (pathlen <= XFS_IFORK_DSIZE(ip)) { | |
1637 | xfs_idata_realloc(ip, pathlen, XFS_DATA_FORK); | |
1638 | memcpy(ip->i_df.if_u1.if_data, target_path, pathlen); | |
1639 | ip->i_d.di_size = pathlen; | |
1640 | ||
1641 | /* | |
1642 | * The inode was initially created in extent format. | |
1643 | */ | |
1644 | ip->i_df.if_flags &= ~(XFS_IFEXTENTS | XFS_IFBROOT); | |
1645 | ip->i_df.if_flags |= XFS_IFINLINE; | |
1646 | ||
1647 | ip->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
1648 | xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE); | |
1649 | ||
1650 | } else { | |
1651 | first_fsb = 0; | |
1652 | nmaps = SYMLINK_MAPS; | |
1653 | ||
c0dc7828 DC |
1654 | error = xfs_bmapi_write(tp, ip, first_fsb, fs_blocks, |
1655 | XFS_BMAPI_METADATA, &first_block, resblks, | |
1656 | mval, &nmaps, &free_list); | |
ec3ba85f CH |
1657 | if (error) |
1658 | goto error2; | |
1da177e4 LT |
1659 | |
1660 | if (resblks) | |
1661 | resblks -= fs_blocks; | |
1662 | ip->i_d.di_size = pathlen; | |
1663 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
1664 | ||
1665 | cur_chunk = target_path; | |
1666 | for (n = 0; n < nmaps; n++) { | |
1667 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); | |
1668 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
1669 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, | |
1670 | BTOBB(byte_cnt), 0); | |
2a30f36d CS |
1671 | if (!bp) { |
1672 | error = ENOMEM; | |
1673 | goto error2; | |
1674 | } | |
1da177e4 LT |
1675 | if (pathlen < byte_cnt) { |
1676 | byte_cnt = pathlen; | |
1677 | } | |
1678 | pathlen -= byte_cnt; | |
1679 | ||
62926044 | 1680 | memcpy(bp->b_addr, cur_chunk, byte_cnt); |
1da177e4 LT |
1681 | cur_chunk += byte_cnt; |
1682 | ||
1683 | xfs_trans_log_buf(tp, bp, 0, byte_cnt - 1); | |
1684 | } | |
1685 | } | |
1686 | ||
1687 | /* | |
1688 | * Create the directory entry for the symlink. | |
1689 | */ | |
556b8b16 BN |
1690 | error = xfs_dir_createname(tp, dp, link_name, ip->i_ino, |
1691 | &first_block, &free_list, resblks); | |
f6c2d1fa | 1692 | if (error) |
ec3ba85f | 1693 | goto error2; |
dcd79a14 | 1694 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1da177e4 LT |
1695 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); |
1696 | ||
1da177e4 LT |
1697 | /* |
1698 | * If this is a synchronous mount, make sure that the | |
1699 | * symlink transaction goes to disk before returning to | |
1700 | * the user. | |
1701 | */ | |
1702 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
1703 | xfs_trans_set_sync(tp); | |
1704 | } | |
1705 | ||
f7c99b6f | 1706 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
1707 | if (error) { |
1708 | goto error2; | |
1709 | } | |
1c72bf90 | 1710 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
7d095257 CH |
1711 | xfs_qm_dqrele(udqp); |
1712 | xfs_qm_dqrele(gdqp); | |
1da177e4 | 1713 | |
288699fe CH |
1714 | *ipp = ip; |
1715 | return 0; | |
1da177e4 LT |
1716 | |
1717 | error2: | |
1718 | IRELE(ip); | |
1719 | error1: | |
1720 | xfs_bmap_cancel(&free_list); | |
1721 | cancel_flags |= XFS_TRANS_ABORT; | |
1722 | error_return: | |
1723 | xfs_trans_cancel(tp, cancel_flags); | |
7d095257 CH |
1724 | xfs_qm_dqrele(udqp); |
1725 | xfs_qm_dqrele(gdqp); | |
1da177e4 | 1726 | |
993386c1 | 1727 | if (unlock_dp_on_error) |
1da177e4 | 1728 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
288699fe CH |
1729 | std_return: |
1730 | return error; | |
1da177e4 LT |
1731 | } |
1732 | ||
1da177e4 | 1733 | int |
993386c1 CH |
1734 | xfs_set_dmattrs( |
1735 | xfs_inode_t *ip, | |
1da177e4 | 1736 | u_int evmask, |
993386c1 | 1737 | u_int16_t state) |
1da177e4 | 1738 | { |
993386c1 | 1739 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 | 1740 | xfs_trans_t *tp; |
1da177e4 LT |
1741 | int error; |
1742 | ||
1743 | if (!capable(CAP_SYS_ADMIN)) | |
1744 | return XFS_ERROR(EPERM); | |
1745 | ||
1da177e4 LT |
1746 | if (XFS_FORCED_SHUTDOWN(mp)) |
1747 | return XFS_ERROR(EIO); | |
1748 | ||
1749 | tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS); | |
1750 | error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES (mp), 0, 0, 0); | |
1751 | if (error) { | |
1752 | xfs_trans_cancel(tp, 0); | |
1753 | return error; | |
1754 | } | |
1755 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
ddc3415a | 1756 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
1da177e4 | 1757 | |
613d7043 CH |
1758 | ip->i_d.di_dmevmask = evmask; |
1759 | ip->i_d.di_dmstate = state; | |
1da177e4 LT |
1760 | |
1761 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
1c72bf90 | 1762 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
1763 | |
1764 | return error; | |
1765 | } | |
1766 | ||
1da177e4 LT |
1767 | /* |
1768 | * xfs_alloc_file_space() | |
1769 | * This routine allocates disk space for the given file. | |
1770 | * | |
1771 | * If alloc_type == 0, this request is for an ALLOCSP type | |
1772 | * request which will change the file size. In this case, no | |
1773 | * DMAPI event will be generated by the call. A TRUNCATE event | |
1774 | * will be generated later by xfs_setattr. | |
1775 | * | |
1776 | * If alloc_type != 0, this request is for a RESVSP type | |
1777 | * request, and a DMAPI DM_EVENT_WRITE will be generated if the | |
1778 | * lower block boundary byte address is less than the file's | |
1779 | * length. | |
1780 | * | |
1781 | * RETURNS: | |
1782 | * 0 on success | |
1783 | * errno on error | |
1784 | * | |
1785 | */ | |
ba0f32d4 | 1786 | STATIC int |
1da177e4 LT |
1787 | xfs_alloc_file_space( |
1788 | xfs_inode_t *ip, | |
1789 | xfs_off_t offset, | |
1790 | xfs_off_t len, | |
1791 | int alloc_type, | |
1792 | int attr_flags) | |
1793 | { | |
dd9f438e NS |
1794 | xfs_mount_t *mp = ip->i_mount; |
1795 | xfs_off_t count; | |
1da177e4 LT |
1796 | xfs_filblks_t allocated_fsb; |
1797 | xfs_filblks_t allocatesize_fsb; | |
dd9f438e NS |
1798 | xfs_extlen_t extsz, temp; |
1799 | xfs_fileoff_t startoffset_fsb; | |
1da177e4 | 1800 | xfs_fsblock_t firstfsb; |
dd9f438e | 1801 | int nimaps; |
dd9f438e | 1802 | int quota_flag; |
1da177e4 | 1803 | int rt; |
1da177e4 | 1804 | xfs_trans_t *tp; |
dd9f438e NS |
1805 | xfs_bmbt_irec_t imaps[1], *imapp; |
1806 | xfs_bmap_free_t free_list; | |
1807 | uint qblocks, resblks, resrtextents; | |
1808 | int committed; | |
1809 | int error; | |
1da177e4 | 1810 | |
cca28fb8 | 1811 | trace_xfs_alloc_file_space(ip); |
1da177e4 LT |
1812 | |
1813 | if (XFS_FORCED_SHUTDOWN(mp)) | |
1814 | return XFS_ERROR(EIO); | |
1815 | ||
7d095257 CH |
1816 | error = xfs_qm_dqattach(ip, 0); |
1817 | if (error) | |
1da177e4 LT |
1818 | return error; |
1819 | ||
1820 | if (len <= 0) | |
1821 | return XFS_ERROR(EINVAL); | |
1822 | ||
957d0ebe DC |
1823 | rt = XFS_IS_REALTIME_INODE(ip); |
1824 | extsz = xfs_get_extsz_hint(ip); | |
1825 | ||
1da177e4 | 1826 | count = len; |
1da177e4 | 1827 | imapp = &imaps[0]; |
dd9f438e | 1828 | nimaps = 1; |
1da177e4 LT |
1829 | startoffset_fsb = XFS_B_TO_FSBT(mp, offset); |
1830 | allocatesize_fsb = XFS_B_TO_FSB(mp, count); | |
1831 | ||
1da177e4 | 1832 | /* |
dd9f438e | 1833 | * Allocate file space until done or until there is an error |
1da177e4 | 1834 | */ |
1da177e4 | 1835 | while (allocatesize_fsb && !error) { |
dd9f438e NS |
1836 | xfs_fileoff_t s, e; |
1837 | ||
1da177e4 | 1838 | /* |
3ddb8fa9 | 1839 | * Determine space reservations for data/realtime. |
1da177e4 | 1840 | */ |
dd9f438e | 1841 | if (unlikely(extsz)) { |
1da177e4 | 1842 | s = startoffset_fsb; |
dd9f438e NS |
1843 | do_div(s, extsz); |
1844 | s *= extsz; | |
1845 | e = startoffset_fsb + allocatesize_fsb; | |
1846 | if ((temp = do_mod(startoffset_fsb, extsz))) | |
1847 | e += temp; | |
1848 | if ((temp = do_mod(e, extsz))) | |
1849 | e += extsz - temp; | |
1850 | } else { | |
1851 | s = 0; | |
1852 | e = allocatesize_fsb; | |
1853 | } | |
1854 | ||
72656c46 DC |
1855 | /* |
1856 | * The transaction reservation is limited to a 32-bit block | |
1857 | * count, hence we need to limit the number of blocks we are | |
1858 | * trying to reserve to avoid an overflow. We can't allocate | |
1859 | * more than @nimaps extents, and an extent is limited on disk | |
1860 | * to MAXEXTLEN (21 bits), so use that to enforce the limit. | |
1861 | */ | |
1862 | resblks = min_t(xfs_fileoff_t, (e - s), (MAXEXTLEN * nimaps)); | |
dd9f438e | 1863 | if (unlikely(rt)) { |
72656c46 | 1864 | resrtextents = qblocks = resblks; |
dd9f438e NS |
1865 | resrtextents /= mp->m_sb.sb_rextsize; |
1866 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); | |
1867 | quota_flag = XFS_QMOPT_RES_RTBLKS; | |
1da177e4 | 1868 | } else { |
dd9f438e | 1869 | resrtextents = 0; |
72656c46 | 1870 | resblks = qblocks = XFS_DIOSTRAT_SPACE_RES(mp, resblks); |
dd9f438e | 1871 | quota_flag = XFS_QMOPT_RES_REGBLKS; |
1da177e4 LT |
1872 | } |
1873 | ||
1874 | /* | |
dd9f438e | 1875 | * Allocate and setup the transaction. |
1da177e4 LT |
1876 | */ |
1877 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); | |
dd9f438e NS |
1878 | error = xfs_trans_reserve(tp, resblks, |
1879 | XFS_WRITE_LOG_RES(mp), resrtextents, | |
1da177e4 LT |
1880 | XFS_TRANS_PERM_LOG_RES, |
1881 | XFS_WRITE_LOG_COUNT); | |
1da177e4 | 1882 | /* |
dd9f438e | 1883 | * Check for running out of space |
1da177e4 LT |
1884 | */ |
1885 | if (error) { | |
1886 | /* | |
1887 | * Free the transaction structure. | |
1888 | */ | |
1889 | ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); | |
1890 | xfs_trans_cancel(tp, 0); | |
1891 | break; | |
1892 | } | |
1893 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
7d095257 CH |
1894 | error = xfs_trans_reserve_quota_nblks(tp, ip, qblocks, |
1895 | 0, quota_flag); | |
1da177e4 LT |
1896 | if (error) |
1897 | goto error1; | |
1898 | ||
ddc3415a | 1899 | xfs_trans_ijoin(tp, ip, 0); |
1da177e4 | 1900 | |
9d87c319 | 1901 | xfs_bmap_init(&free_list, &firstfsb); |
c0dc7828 DC |
1902 | error = xfs_bmapi_write(tp, ip, startoffset_fsb, |
1903 | allocatesize_fsb, alloc_type, &firstfsb, | |
1904 | 0, imapp, &nimaps, &free_list); | |
1da177e4 LT |
1905 | if (error) { |
1906 | goto error0; | |
1907 | } | |
1908 | ||
1909 | /* | |
dd9f438e | 1910 | * Complete the transaction |
1da177e4 | 1911 | */ |
f7c99b6f | 1912 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
1913 | if (error) { |
1914 | goto error0; | |
1915 | } | |
1916 | ||
1c72bf90 | 1917 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
1918 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
1919 | if (error) { | |
1920 | break; | |
1921 | } | |
1922 | ||
1923 | allocated_fsb = imapp->br_blockcount; | |
1924 | ||
dd9f438e | 1925 | if (nimaps == 0) { |
1da177e4 LT |
1926 | error = XFS_ERROR(ENOSPC); |
1927 | break; | |
1928 | } | |
1929 | ||
1930 | startoffset_fsb += allocated_fsb; | |
1931 | allocatesize_fsb -= allocated_fsb; | |
1932 | } | |
1da177e4 LT |
1933 | |
1934 | return error; | |
1935 | ||
dd9f438e | 1936 | error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */ |
1da177e4 | 1937 | xfs_bmap_cancel(&free_list); |
7d095257 | 1938 | xfs_trans_unreserve_quota_nblks(tp, ip, qblocks, 0, quota_flag); |
dd9f438e NS |
1939 | |
1940 | error1: /* Just cancel transaction */ | |
1da177e4 LT |
1941 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
1942 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
288699fe | 1943 | return error; |
1da177e4 LT |
1944 | } |
1945 | ||
1946 | /* | |
1947 | * Zero file bytes between startoff and endoff inclusive. | |
1948 | * The iolock is held exclusive and no blocks are buffered. | |
2fd6f6ec LM |
1949 | * |
1950 | * This function is used by xfs_free_file_space() to zero | |
1951 | * partial blocks when the range to free is not block aligned. | |
1952 | * When unreserving space with boundaries that are not block | |
1953 | * aligned we round up the start and round down the end | |
1954 | * boundaries and then use this function to zero the parts of | |
1955 | * the blocks that got dropped during the rounding. | |
1da177e4 LT |
1956 | */ |
1957 | STATIC int | |
1958 | xfs_zero_remaining_bytes( | |
1959 | xfs_inode_t *ip, | |
1960 | xfs_off_t startoff, | |
1961 | xfs_off_t endoff) | |
1962 | { | |
1963 | xfs_bmbt_irec_t imap; | |
1964 | xfs_fileoff_t offset_fsb; | |
1965 | xfs_off_t lastoffset; | |
1966 | xfs_off_t offset; | |
1967 | xfs_buf_t *bp; | |
1968 | xfs_mount_t *mp = ip->i_mount; | |
1969 | int nimap; | |
1970 | int error = 0; | |
1971 | ||
2fd6f6ec LM |
1972 | /* |
1973 | * Avoid doing I/O beyond eof - it's not necessary | |
1974 | * since nothing can read beyond eof. The space will | |
1975 | * be zeroed when the file is extended anyway. | |
1976 | */ | |
1977 | if (startoff >= ip->i_size) | |
1978 | return 0; | |
1979 | ||
1980 | if (endoff > ip->i_size) | |
1981 | endoff = ip->i_size; | |
1982 | ||
686865f7 DC |
1983 | bp = xfs_buf_get_uncached(XFS_IS_REALTIME_INODE(ip) ? |
1984 | mp->m_rtdev_targp : mp->m_ddev_targp, | |
1985 | mp->m_sb.sb_blocksize, XBF_DONT_BLOCK); | |
c6422617 LM |
1986 | if (!bp) |
1987 | return XFS_ERROR(ENOMEM); | |
1da177e4 | 1988 | |
c8da0faf CH |
1989 | xfs_buf_unlock(bp); |
1990 | ||
1da177e4 LT |
1991 | for (offset = startoff; offset <= endoff; offset = lastoffset + 1) { |
1992 | offset_fsb = XFS_B_TO_FSBT(mp, offset); | |
1993 | nimap = 1; | |
5c8ed202 | 1994 | error = xfs_bmapi_read(ip, offset_fsb, 1, &imap, &nimap, 0); |
1da177e4 LT |
1995 | if (error || nimap < 1) |
1996 | break; | |
1997 | ASSERT(imap.br_blockcount >= 1); | |
1998 | ASSERT(imap.br_startoff == offset_fsb); | |
1999 | lastoffset = XFS_FSB_TO_B(mp, imap.br_startoff + 1) - 1; | |
2000 | if (lastoffset > endoff) | |
2001 | lastoffset = endoff; | |
2002 | if (imap.br_startblock == HOLESTARTBLOCK) | |
2003 | continue; | |
2004 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
2005 | if (imap.br_state == XFS_EXT_UNWRITTEN) | |
2006 | continue; | |
2007 | XFS_BUF_UNDONE(bp); | |
2008 | XFS_BUF_UNWRITE(bp); | |
2009 | XFS_BUF_READ(bp); | |
9d87c319 | 2010 | XFS_BUF_SET_ADDR(bp, xfs_fsb_to_db(ip, imap.br_startblock)); |
1da177e4 | 2011 | xfsbdstrat(mp, bp); |
1a1a3e97 | 2012 | error = xfs_buf_iowait(bp); |
d64e31a2 | 2013 | if (error) { |
901796af CH |
2014 | xfs_buf_ioerror_alert(bp, |
2015 | "xfs_zero_remaining_bytes(read)"); | |
1da177e4 LT |
2016 | break; |
2017 | } | |
62926044 | 2018 | memset(bp->b_addr + |
1da177e4 LT |
2019 | (offset - XFS_FSB_TO_B(mp, imap.br_startoff)), |
2020 | 0, lastoffset - offset + 1); | |
2021 | XFS_BUF_UNDONE(bp); | |
2022 | XFS_BUF_UNREAD(bp); | |
2023 | XFS_BUF_WRITE(bp); | |
2024 | xfsbdstrat(mp, bp); | |
1a1a3e97 | 2025 | error = xfs_buf_iowait(bp); |
d64e31a2 | 2026 | if (error) { |
901796af CH |
2027 | xfs_buf_ioerror_alert(bp, |
2028 | "xfs_zero_remaining_bytes(write)"); | |
1da177e4 LT |
2029 | break; |
2030 | } | |
2031 | } | |
2032 | xfs_buf_free(bp); | |
2033 | return error; | |
2034 | } | |
2035 | ||
2036 | /* | |
2037 | * xfs_free_file_space() | |
2038 | * This routine frees disk space for the given file. | |
2039 | * | |
2040 | * This routine is only called by xfs_change_file_space | |
2041 | * for an UNRESVSP type call. | |
2042 | * | |
2043 | * RETURNS: | |
2044 | * 0 on success | |
2045 | * errno on error | |
2046 | * | |
2047 | */ | |
2048 | STATIC int | |
2049 | xfs_free_file_space( | |
2050 | xfs_inode_t *ip, | |
2051 | xfs_off_t offset, | |
2052 | xfs_off_t len, | |
2053 | int attr_flags) | |
2054 | { | |
2055 | int committed; | |
2056 | int done; | |
1da177e4 LT |
2057 | xfs_fileoff_t endoffset_fsb; |
2058 | int error; | |
2059 | xfs_fsblock_t firstfsb; | |
2060 | xfs_bmap_free_t free_list; | |
1da177e4 LT |
2061 | xfs_bmbt_irec_t imap; |
2062 | xfs_off_t ioffset; | |
2063 | xfs_extlen_t mod=0; | |
2064 | xfs_mount_t *mp; | |
2065 | int nimap; | |
2066 | uint resblks; | |
673cdf5c | 2067 | uint rounding; |
1da177e4 LT |
2068 | int rt; |
2069 | xfs_fileoff_t startoffset_fsb; | |
2070 | xfs_trans_t *tp; | |
5fcbab35 | 2071 | int need_iolock = 1; |
1da177e4 | 2072 | |
1da177e4 LT |
2073 | mp = ip->i_mount; |
2074 | ||
cca28fb8 | 2075 | trace_xfs_free_file_space(ip); |
bd5a876a | 2076 | |
7d095257 CH |
2077 | error = xfs_qm_dqattach(ip, 0); |
2078 | if (error) | |
1da177e4 LT |
2079 | return error; |
2080 | ||
2081 | error = 0; | |
2082 | if (len <= 0) /* if nothing being freed */ | |
2083 | return error; | |
71ddabb9 | 2084 | rt = XFS_IS_REALTIME_INODE(ip); |
1da177e4 | 2085 | startoffset_fsb = XFS_B_TO_FSB(mp, offset); |
288699fe | 2086 | endoffset_fsb = XFS_B_TO_FSBT(mp, offset + len); |
1da177e4 | 2087 | |
0f285c8a | 2088 | if (attr_flags & XFS_ATTR_NOLOCK) |
5fcbab35 | 2089 | need_iolock = 0; |
9fa8046f | 2090 | if (need_iolock) { |
1da177e4 | 2091 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
25e41b3d | 2092 | /* wait for the completion of any pending DIOs */ |
4a06fd26 | 2093 | inode_dio_wait(VFS_I(ip)); |
9fa8046f | 2094 | } |
5fcbab35 | 2095 | |
e6a4b37f | 2096 | rounding = max_t(uint, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE); |
1da177e4 | 2097 | ioffset = offset & ~(rounding - 1); |
bd5a876a | 2098 | |
df80c933 | 2099 | if (VN_CACHED(VFS_I(ip)) != 0) { |
e6a4b37f | 2100 | error = xfs_flushinval_pages(ip, ioffset, -1, FI_REMAPF_LOCKED); |
d3cf2094 LM |
2101 | if (error) |
2102 | goto out_unlock_iolock; | |
bd5a876a CH |
2103 | } |
2104 | ||
1da177e4 LT |
2105 | /* |
2106 | * Need to zero the stuff we're not freeing, on disk. | |
9da096fd | 2107 | * If it's a realtime file & can't use unwritten extents then we |
1da177e4 LT |
2108 | * actually need to zero the extent edges. Otherwise xfs_bunmapi |
2109 | * will take care of it for us. | |
2110 | */ | |
62118709 | 2111 | if (rt && !xfs_sb_version_hasextflgbit(&mp->m_sb)) { |
1da177e4 | 2112 | nimap = 1; |
5c8ed202 DC |
2113 | error = xfs_bmapi_read(ip, startoffset_fsb, 1, |
2114 | &imap, &nimap, 0); | |
1da177e4 LT |
2115 | if (error) |
2116 | goto out_unlock_iolock; | |
2117 | ASSERT(nimap == 0 || nimap == 1); | |
2118 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { | |
2119 | xfs_daddr_t block; | |
2120 | ||
2121 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
2122 | block = imap.br_startblock; | |
2123 | mod = do_div(block, mp->m_sb.sb_rextsize); | |
2124 | if (mod) | |
2125 | startoffset_fsb += mp->m_sb.sb_rextsize - mod; | |
2126 | } | |
2127 | nimap = 1; | |
5c8ed202 DC |
2128 | error = xfs_bmapi_read(ip, endoffset_fsb - 1, 1, |
2129 | &imap, &nimap, 0); | |
1da177e4 LT |
2130 | if (error) |
2131 | goto out_unlock_iolock; | |
2132 | ASSERT(nimap == 0 || nimap == 1); | |
2133 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { | |
2134 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
2135 | mod++; | |
2136 | if (mod && (mod != mp->m_sb.sb_rextsize)) | |
2137 | endoffset_fsb -= mod; | |
2138 | } | |
2139 | } | |
2140 | if ((done = (endoffset_fsb <= startoffset_fsb))) | |
2141 | /* | |
2142 | * One contiguous piece to clear | |
2143 | */ | |
2144 | error = xfs_zero_remaining_bytes(ip, offset, offset + len - 1); | |
2145 | else { | |
2146 | /* | |
2147 | * Some full blocks, possibly two pieces to clear | |
2148 | */ | |
2149 | if (offset < XFS_FSB_TO_B(mp, startoffset_fsb)) | |
2150 | error = xfs_zero_remaining_bytes(ip, offset, | |
2151 | XFS_FSB_TO_B(mp, startoffset_fsb) - 1); | |
2152 | if (!error && | |
2153 | XFS_FSB_TO_B(mp, endoffset_fsb) < offset + len) | |
2154 | error = xfs_zero_remaining_bytes(ip, | |
2155 | XFS_FSB_TO_B(mp, endoffset_fsb), | |
2156 | offset + len - 1); | |
2157 | } | |
2158 | ||
2159 | /* | |
2160 | * free file space until done or until there is an error | |
2161 | */ | |
2162 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); | |
2163 | while (!error && !done) { | |
2164 | ||
2165 | /* | |
91ebecc7 DC |
2166 | * allocate and setup the transaction. Allow this |
2167 | * transaction to dip into the reserve blocks to ensure | |
2168 | * the freeing of the space succeeds at ENOSPC. | |
1da177e4 LT |
2169 | */ |
2170 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); | |
91ebecc7 | 2171 | tp->t_flags |= XFS_TRANS_RESERVE; |
1da177e4 LT |
2172 | error = xfs_trans_reserve(tp, |
2173 | resblks, | |
2174 | XFS_WRITE_LOG_RES(mp), | |
2175 | 0, | |
2176 | XFS_TRANS_PERM_LOG_RES, | |
2177 | XFS_WRITE_LOG_COUNT); | |
2178 | ||
2179 | /* | |
2180 | * check for running out of space | |
2181 | */ | |
2182 | if (error) { | |
2183 | /* | |
2184 | * Free the transaction structure. | |
2185 | */ | |
2186 | ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); | |
2187 | xfs_trans_cancel(tp, 0); | |
2188 | break; | |
2189 | } | |
2190 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
7d095257 CH |
2191 | error = xfs_trans_reserve_quota(tp, mp, |
2192 | ip->i_udquot, ip->i_gdquot, | |
2193 | resblks, 0, XFS_QMOPT_RES_REGBLKS); | |
1da177e4 LT |
2194 | if (error) |
2195 | goto error1; | |
2196 | ||
ddc3415a | 2197 | xfs_trans_ijoin(tp, ip, 0); |
1da177e4 LT |
2198 | |
2199 | /* | |
2200 | * issue the bunmapi() call to free the blocks | |
2201 | */ | |
9d87c319 | 2202 | xfs_bmap_init(&free_list, &firstfsb); |
541d7d3c | 2203 | error = xfs_bunmapi(tp, ip, startoffset_fsb, |
1da177e4 | 2204 | endoffset_fsb - startoffset_fsb, |
b4e9181e | 2205 | 0, 2, &firstfsb, &free_list, &done); |
1da177e4 LT |
2206 | if (error) { |
2207 | goto error0; | |
2208 | } | |
2209 | ||
2210 | /* | |
2211 | * complete the transaction | |
2212 | */ | |
f7c99b6f | 2213 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
2214 | if (error) { |
2215 | goto error0; | |
2216 | } | |
2217 | ||
1c72bf90 | 2218 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
2219 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
2220 | } | |
2221 | ||
2222 | out_unlock_iolock: | |
2223 | if (need_iolock) | |
2224 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
2225 | return error; | |
2226 | ||
2227 | error0: | |
2228 | xfs_bmap_cancel(&free_list); | |
2229 | error1: | |
2230 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
2231 | xfs_iunlock(ip, need_iolock ? (XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL) : | |
2232 | XFS_ILOCK_EXCL); | |
2233 | return error; | |
2234 | } | |
2235 | ||
2236 | /* | |
2237 | * xfs_change_file_space() | |
2238 | * This routine allocates or frees disk space for the given file. | |
2239 | * The user specified parameters are checked for alignment and size | |
2240 | * limitations. | |
2241 | * | |
2242 | * RETURNS: | |
2243 | * 0 on success | |
2244 | * errno on error | |
2245 | * | |
2246 | */ | |
2247 | int | |
2248 | xfs_change_file_space( | |
993386c1 | 2249 | xfs_inode_t *ip, |
1da177e4 LT |
2250 | int cmd, |
2251 | xfs_flock64_t *bf, | |
2252 | xfs_off_t offset, | |
1da177e4 LT |
2253 | int attr_flags) |
2254 | { | |
993386c1 | 2255 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 LT |
2256 | int clrprealloc; |
2257 | int error; | |
2258 | xfs_fsize_t fsize; | |
1da177e4 LT |
2259 | int setprealloc; |
2260 | xfs_off_t startoffset; | |
2261 | xfs_off_t llen; | |
2262 | xfs_trans_t *tp; | |
0f285c8a | 2263 | struct iattr iattr; |
44722352 | 2264 | int prealloc_type; |
1da177e4 | 2265 | |
993386c1 | 2266 | if (!S_ISREG(ip->i_d.di_mode)) |
1da177e4 LT |
2267 | return XFS_ERROR(EINVAL); |
2268 | ||
1da177e4 LT |
2269 | switch (bf->l_whence) { |
2270 | case 0: /*SEEK_SET*/ | |
2271 | break; | |
2272 | case 1: /*SEEK_CUR*/ | |
2273 | bf->l_start += offset; | |
2274 | break; | |
2275 | case 2: /*SEEK_END*/ | |
ba87ea69 | 2276 | bf->l_start += ip->i_size; |
1da177e4 LT |
2277 | break; |
2278 | default: | |
2279 | return XFS_ERROR(EINVAL); | |
2280 | } | |
2281 | ||
2282 | llen = bf->l_len > 0 ? bf->l_len - 1 : bf->l_len; | |
2283 | ||
2284 | if ( (bf->l_start < 0) | |
2285 | || (bf->l_start > XFS_MAXIOFFSET(mp)) | |
2286 | || (bf->l_start + llen < 0) | |
2287 | || (bf->l_start + llen > XFS_MAXIOFFSET(mp))) | |
2288 | return XFS_ERROR(EINVAL); | |
2289 | ||
2290 | bf->l_whence = 0; | |
2291 | ||
2292 | startoffset = bf->l_start; | |
ba87ea69 | 2293 | fsize = ip->i_size; |
1da177e4 LT |
2294 | |
2295 | /* | |
2296 | * XFS_IOC_RESVSP and XFS_IOC_UNRESVSP will reserve or unreserve | |
2297 | * file space. | |
2298 | * These calls do NOT zero the data space allocated to the file, | |
2299 | * nor do they change the file size. | |
2300 | * | |
2301 | * XFS_IOC_ALLOCSP and XFS_IOC_FREESP will allocate and free file | |
2302 | * space. | |
2303 | * These calls cause the new file data to be zeroed and the file | |
2304 | * size to be changed. | |
2305 | */ | |
2306 | setprealloc = clrprealloc = 0; | |
44722352 | 2307 | prealloc_type = XFS_BMAPI_PREALLOC; |
1da177e4 LT |
2308 | |
2309 | switch (cmd) { | |
44722352 DC |
2310 | case XFS_IOC_ZERO_RANGE: |
2311 | prealloc_type |= XFS_BMAPI_CONVERT; | |
2312 | xfs_tosspages(ip, startoffset, startoffset + bf->l_len, 0); | |
2313 | /* FALLTHRU */ | |
1da177e4 LT |
2314 | case XFS_IOC_RESVSP: |
2315 | case XFS_IOC_RESVSP64: | |
2316 | error = xfs_alloc_file_space(ip, startoffset, bf->l_len, | |
44722352 | 2317 | prealloc_type, attr_flags); |
1da177e4 LT |
2318 | if (error) |
2319 | return error; | |
2320 | setprealloc = 1; | |
2321 | break; | |
2322 | ||
2323 | case XFS_IOC_UNRESVSP: | |
2324 | case XFS_IOC_UNRESVSP64: | |
2325 | if ((error = xfs_free_file_space(ip, startoffset, bf->l_len, | |
2326 | attr_flags))) | |
2327 | return error; | |
2328 | break; | |
2329 | ||
2330 | case XFS_IOC_ALLOCSP: | |
2331 | case XFS_IOC_ALLOCSP64: | |
2332 | case XFS_IOC_FREESP: | |
2333 | case XFS_IOC_FREESP64: | |
2334 | if (startoffset > fsize) { | |
2335 | error = xfs_alloc_file_space(ip, fsize, | |
2336 | startoffset - fsize, 0, attr_flags); | |
2337 | if (error) | |
2338 | break; | |
2339 | } | |
2340 | ||
0f285c8a CH |
2341 | iattr.ia_valid = ATTR_SIZE; |
2342 | iattr.ia_size = startoffset; | |
1da177e4 | 2343 | |
c4ed4243 | 2344 | error = xfs_setattr_size(ip, &iattr, attr_flags); |
1da177e4 LT |
2345 | |
2346 | if (error) | |
2347 | return error; | |
2348 | ||
2349 | clrprealloc = 1; | |
2350 | break; | |
2351 | ||
2352 | default: | |
2353 | ASSERT(0); | |
2354 | return XFS_ERROR(EINVAL); | |
2355 | } | |
2356 | ||
2357 | /* | |
2358 | * update the inode timestamp, mode, and prealloc flag bits | |
2359 | */ | |
2360 | tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID); | |
2361 | ||
2362 | if ((error = xfs_trans_reserve(tp, 0, XFS_WRITEID_LOG_RES(mp), | |
2363 | 0, 0, 0))) { | |
2364 | /* ASSERT(0); */ | |
2365 | xfs_trans_cancel(tp, 0); | |
2366 | return error; | |
2367 | } | |
2368 | ||
2369 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
ddc3415a | 2370 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
1da177e4 | 2371 | |
0f285c8a | 2372 | if ((attr_flags & XFS_ATTR_DMI) == 0) { |
1da177e4 LT |
2373 | ip->i_d.di_mode &= ~S_ISUID; |
2374 | ||
2375 | /* | |
2376 | * Note that we don't have to worry about mandatory | |
2377 | * file locking being disabled here because we only | |
2378 | * clear the S_ISGID bit if the Group execute bit is | |
2379 | * on, but if it was on then mandatory locking wouldn't | |
2380 | * have been enabled. | |
2381 | */ | |
2382 | if (ip->i_d.di_mode & S_IXGRP) | |
2383 | ip->i_d.di_mode &= ~S_ISGID; | |
2384 | ||
dcd79a14 | 2385 | xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1da177e4 LT |
2386 | } |
2387 | if (setprealloc) | |
2388 | ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC; | |
2389 | else if (clrprealloc) | |
2390 | ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC; | |
2391 | ||
2392 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
82878897 DC |
2393 | if (attr_flags & XFS_ATTR_SYNC) |
2394 | xfs_trans_set_sync(tp); | |
23bb0be1 | 2395 | return xfs_trans_commit(tp, 0); |
1da177e4 | 2396 | } |