Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include "xfs.h" |
1da177e4 | 19 | #include "xfs_fs.h" |
a844f451 | 20 | #include "xfs_bit.h" |
1da177e4 | 21 | #include "xfs_log.h" |
a844f451 | 22 | #include "xfs_inum.h" |
1da177e4 LT |
23 | #include "xfs_trans.h" |
24 | #include "xfs_sb.h" | |
25 | #include "xfs_ag.h" | |
1da177e4 LT |
26 | #include "xfs_dir2.h" |
27 | #include "xfs_alloc.h" | |
28 | #include "xfs_dmapi.h" | |
29 | #include "xfs_quota.h" | |
30 | #include "xfs_mount.h" | |
1da177e4 | 31 | #include "xfs_bmap_btree.h" |
a844f451 | 32 | #include "xfs_alloc_btree.h" |
1da177e4 | 33 | #include "xfs_ialloc_btree.h" |
1da177e4 | 34 | #include "xfs_dir2_sf.h" |
a844f451 | 35 | #include "xfs_attr_sf.h" |
1da177e4 LT |
36 | #include "xfs_dinode.h" |
37 | #include "xfs_inode.h" | |
38 | #include "xfs_bmap.h" | |
a844f451 NS |
39 | #include "xfs_btree.h" |
40 | #include "xfs_ialloc.h" | |
1da177e4 LT |
41 | #include "xfs_rtalloc.h" |
42 | #include "xfs_error.h" | |
43 | #include "xfs_itable.h" | |
44 | #include "xfs_rw.h" | |
45 | #include "xfs_acl.h" | |
1da177e4 LT |
46 | #include "xfs_attr.h" |
47 | #include "xfs_inode_item.h" | |
48 | #include "xfs_buf_item.h" | |
49 | #include "xfs_utils.h" | |
50 | #include "xfs_iomap.h" | |
51 | ||
52 | #include <linux/capability.h> | |
53 | #include <linux/writeback.h> | |
54 | ||
55 | ||
56 | #if defined(XFS_RW_TRACE) | |
57 | void | |
58 | xfs_rw_enter_trace( | |
59 | int tag, | |
60 | xfs_iocore_t *io, | |
61 | void *data, | |
62 | size_t segs, | |
63 | loff_t offset, | |
64 | int ioflags) | |
65 | { | |
66 | xfs_inode_t *ip = XFS_IO_INODE(io); | |
67 | ||
68 | if (ip->i_rwtrace == NULL) | |
69 | return; | |
70 | ktrace_enter(ip->i_rwtrace, | |
71 | (void *)(unsigned long)tag, | |
72 | (void *)ip, | |
73 | (void *)((unsigned long)((ip->i_d.di_size >> 32) & 0xffffffff)), | |
74 | (void *)((unsigned long)(ip->i_d.di_size & 0xffffffff)), | |
75 | (void *)data, | |
76 | (void *)((unsigned long)segs), | |
77 | (void *)((unsigned long)((offset >> 32) & 0xffffffff)), | |
78 | (void *)((unsigned long)(offset & 0xffffffff)), | |
79 | (void *)((unsigned long)ioflags), | |
80 | (void *)((unsigned long)((io->io_new_size >> 32) & 0xffffffff)), | |
81 | (void *)((unsigned long)(io->io_new_size & 0xffffffff)), | |
f1fdc848 | 82 | (void *)((unsigned long)current_pid()), |
1da177e4 LT |
83 | (void *)NULL, |
84 | (void *)NULL, | |
85 | (void *)NULL, | |
86 | (void *)NULL); | |
87 | } | |
88 | ||
89 | void | |
90 | xfs_inval_cached_trace( | |
91 | xfs_iocore_t *io, | |
92 | xfs_off_t offset, | |
93 | xfs_off_t len, | |
94 | xfs_off_t first, | |
95 | xfs_off_t last) | |
96 | { | |
97 | xfs_inode_t *ip = XFS_IO_INODE(io); | |
98 | ||
99 | if (ip->i_rwtrace == NULL) | |
100 | return; | |
101 | ktrace_enter(ip->i_rwtrace, | |
102 | (void *)(__psint_t)XFS_INVAL_CACHED, | |
103 | (void *)ip, | |
104 | (void *)((unsigned long)((offset >> 32) & 0xffffffff)), | |
105 | (void *)((unsigned long)(offset & 0xffffffff)), | |
106 | (void *)((unsigned long)((len >> 32) & 0xffffffff)), | |
107 | (void *)((unsigned long)(len & 0xffffffff)), | |
108 | (void *)((unsigned long)((first >> 32) & 0xffffffff)), | |
109 | (void *)((unsigned long)(first & 0xffffffff)), | |
110 | (void *)((unsigned long)((last >> 32) & 0xffffffff)), | |
111 | (void *)((unsigned long)(last & 0xffffffff)), | |
f1fdc848 | 112 | (void *)((unsigned long)current_pid()), |
1da177e4 LT |
113 | (void *)NULL, |
114 | (void *)NULL, | |
115 | (void *)NULL, | |
116 | (void *)NULL, | |
117 | (void *)NULL); | |
118 | } | |
119 | #endif | |
120 | ||
121 | /* | |
122 | * xfs_iozero | |
123 | * | |
124 | * xfs_iozero clears the specified range of buffer supplied, | |
125 | * and marks all the affected blocks as valid and modified. If | |
126 | * an affected block is not allocated, it will be allocated. If | |
127 | * an affected block is not completely overwritten, and is not | |
128 | * valid before the operation, it will be read from disk before | |
129 | * being partially zeroed. | |
130 | */ | |
131 | STATIC int | |
132 | xfs_iozero( | |
133 | struct inode *ip, /* inode */ | |
134 | loff_t pos, /* offset in file */ | |
68160161 | 135 | size_t count) /* size of data to zero */ |
1da177e4 LT |
136 | { |
137 | unsigned bytes; | |
138 | struct page *page; | |
139 | struct address_space *mapping; | |
1da177e4 LT |
140 | int status; |
141 | ||
142 | mapping = ip->i_mapping; | |
143 | do { | |
144 | unsigned long index, offset; | |
145 | ||
146 | offset = (pos & (PAGE_CACHE_SIZE -1)); /* Within page */ | |
147 | index = pos >> PAGE_CACHE_SHIFT; | |
148 | bytes = PAGE_CACHE_SIZE - offset; | |
149 | if (bytes > count) | |
150 | bytes = count; | |
151 | ||
152 | status = -ENOMEM; | |
153 | page = grab_cache_page(mapping, index); | |
154 | if (!page) | |
155 | break; | |
156 | ||
1da177e4 LT |
157 | status = mapping->a_ops->prepare_write(NULL, page, offset, |
158 | offset + bytes); | |
e7ff6aed | 159 | if (status) |
1da177e4 | 160 | goto unlock; |
1da177e4 | 161 | |
e7ff6aed DC |
162 | memclear_highpage_flush(page, offset, bytes); |
163 | ||
1da177e4 LT |
164 | status = mapping->a_ops->commit_write(NULL, page, offset, |
165 | offset + bytes); | |
166 | if (!status) { | |
167 | pos += bytes; | |
168 | count -= bytes; | |
1da177e4 LT |
169 | } |
170 | ||
171 | unlock: | |
1da177e4 LT |
172 | unlock_page(page); |
173 | page_cache_release(page); | |
174 | if (status) | |
175 | break; | |
176 | } while (count); | |
177 | ||
178 | return (-status); | |
179 | } | |
180 | ||
1da177e4 LT |
181 | ssize_t /* bytes read, or (-) error */ |
182 | xfs_read( | |
183 | bhv_desc_t *bdp, | |
184 | struct kiocb *iocb, | |
185 | const struct iovec *iovp, | |
186 | unsigned int segs, | |
187 | loff_t *offset, | |
188 | int ioflags, | |
189 | cred_t *credp) | |
190 | { | |
191 | struct file *file = iocb->ki_filp; | |
192 | struct inode *inode = file->f_mapping->host; | |
193 | size_t size = 0; | |
194 | ssize_t ret; | |
195 | xfs_fsize_t n; | |
196 | xfs_inode_t *ip; | |
197 | xfs_mount_t *mp; | |
67fcaa73 | 198 | bhv_vnode_t *vp; |
1da177e4 LT |
199 | unsigned long seg; |
200 | ||
201 | ip = XFS_BHVTOI(bdp); | |
202 | vp = BHV_TO_VNODE(bdp); | |
203 | mp = ip->i_mount; | |
204 | ||
205 | XFS_STATS_INC(xs_read_calls); | |
206 | ||
207 | /* START copy & waste from filemap.c */ | |
208 | for (seg = 0; seg < segs; seg++) { | |
209 | const struct iovec *iv = &iovp[seg]; | |
210 | ||
211 | /* | |
212 | * If any segment has a negative length, or the cumulative | |
213 | * length ever wraps negative then return -EINVAL. | |
214 | */ | |
215 | size += iv->iov_len; | |
216 | if (unlikely((ssize_t)(size|iv->iov_len) < 0)) | |
217 | return XFS_ERROR(-EINVAL); | |
218 | } | |
219 | /* END copy & waste from filemap.c */ | |
220 | ||
221 | if (unlikely(ioflags & IO_ISDIRECT)) { | |
222 | xfs_buftarg_t *target = | |
223 | (ip->i_d.di_flags & XFS_DIFLAG_REALTIME) ? | |
224 | mp->m_rtdev_targp : mp->m_ddev_targp; | |
ce8e922c NS |
225 | if ((*offset & target->bt_smask) || |
226 | (size & target->bt_smask)) { | |
1da177e4 LT |
227 | if (*offset == ip->i_d.di_size) { |
228 | return (0); | |
229 | } | |
230 | return -XFS_ERROR(EINVAL); | |
231 | } | |
232 | } | |
233 | ||
234 | n = XFS_MAXIOFFSET(mp) - *offset; | |
235 | if ((n <= 0) || (size == 0)) | |
236 | return 0; | |
237 | ||
238 | if (n < size) | |
239 | size = n; | |
240 | ||
a13828b1 | 241 | if (XFS_FORCED_SHUTDOWN(mp)) |
1da177e4 | 242 | return -EIO; |
1da177e4 LT |
243 | |
244 | if (unlikely(ioflags & IO_ISDIRECT)) | |
1b1dcc1b | 245 | mutex_lock(&inode->i_mutex); |
1da177e4 LT |
246 | xfs_ilock(ip, XFS_IOLOCK_SHARED); |
247 | ||
248 | if (DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_READ) && | |
249 | !(ioflags & IO_INVIS)) { | |
8285fb58 | 250 | bhv_vrwlock_t locktype = VRWLOCK_READ; |
e1a40fa9 | 251 | int dmflags = FILP_DELAY_FLAG(file) | DM_SEM_FLAG_RD(ioflags); |
1da177e4 LT |
252 | |
253 | ret = -XFS_SEND_DATA(mp, DM_EVENT_READ, | |
254 | BHV_TO_VNODE(bdp), *offset, size, | |
e1a40fa9 | 255 | dmflags, &locktype); |
1da177e4 LT |
256 | if (ret) { |
257 | xfs_iunlock(ip, XFS_IOLOCK_SHARED); | |
721259bc LM |
258 | if (unlikely(ioflags & IO_ISDIRECT)) |
259 | mutex_unlock(&inode->i_mutex); | |
260 | return ret; | |
1da177e4 LT |
261 | } |
262 | } | |
263 | ||
edcd4bce NS |
264 | if (unlikely(ioflags & IO_ISDIRECT)) { |
265 | if (VN_CACHED(vp)) | |
266 | bhv_vop_flushinval_pages(vp, ctooff(offtoct(*offset)), | |
267 | -1, FI_REMAPF_LOCKED); | |
721259bc | 268 | mutex_unlock(&inode->i_mutex); |
edcd4bce | 269 | } |
721259bc | 270 | |
1da177e4 LT |
271 | xfs_rw_enter_trace(XFS_READ_ENTER, &ip->i_iocore, |
272 | (void *)iovp, segs, *offset, ioflags); | |
543ade1f BP |
273 | |
274 | iocb->ki_pos = *offset; | |
275 | ret = generic_file_aio_read(iocb, iovp, segs, *offset); | |
1da177e4 LT |
276 | if (ret == -EIOCBQUEUED && !(ioflags & IO_ISAIO)) |
277 | ret = wait_on_sync_kiocb(iocb); | |
278 | if (ret > 0) | |
279 | XFS_STATS_ADD(xs_read_bytes, ret); | |
280 | ||
281 | xfs_iunlock(ip, XFS_IOLOCK_SHARED); | |
1da177e4 LT |
282 | return ret; |
283 | } | |
284 | ||
285 | ssize_t | |
286 | xfs_sendfile( | |
287 | bhv_desc_t *bdp, | |
288 | struct file *filp, | |
289 | loff_t *offset, | |
290 | int ioflags, | |
291 | size_t count, | |
292 | read_actor_t actor, | |
293 | void *target, | |
294 | cred_t *credp) | |
295 | { | |
1b895840 NS |
296 | xfs_inode_t *ip = XFS_BHVTOI(bdp); |
297 | xfs_mount_t *mp = ip->i_mount; | |
1da177e4 | 298 | ssize_t ret; |
1da177e4 LT |
299 | |
300 | XFS_STATS_INC(xs_read_calls); | |
1b895840 | 301 | if (XFS_FORCED_SHUTDOWN(mp)) |
1da177e4 LT |
302 | return -EIO; |
303 | ||
304 | xfs_ilock(ip, XFS_IOLOCK_SHARED); | |
305 | ||
1b895840 | 306 | if (DM_EVENT_ENABLED(BHV_TO_VNODE(bdp)->v_vfsp, ip, DM_EVENT_READ) && |
1da177e4 | 307 | (!(ioflags & IO_INVIS))) { |
8285fb58 | 308 | bhv_vrwlock_t locktype = VRWLOCK_READ; |
1da177e4 LT |
309 | int error; |
310 | ||
1b895840 NS |
311 | error = XFS_SEND_DATA(mp, DM_EVENT_READ, BHV_TO_VNODE(bdp), |
312 | *offset, count, | |
1da177e4 LT |
313 | FILP_DELAY_FLAG(filp), &locktype); |
314 | if (error) { | |
315 | xfs_iunlock(ip, XFS_IOLOCK_SHARED); | |
316 | return -error; | |
317 | } | |
318 | } | |
319 | xfs_rw_enter_trace(XFS_SENDFILE_ENTER, &ip->i_iocore, | |
320 | (void *)(unsigned long)target, count, *offset, ioflags); | |
321 | ret = generic_file_sendfile(filp, offset, count, actor, target); | |
1b895840 NS |
322 | if (ret > 0) |
323 | XFS_STATS_ADD(xs_read_bytes, ret); | |
1da177e4 LT |
324 | |
325 | xfs_iunlock(ip, XFS_IOLOCK_SHARED); | |
1b895840 NS |
326 | return ret; |
327 | } | |
328 | ||
329 | ssize_t | |
330 | xfs_splice_read( | |
331 | bhv_desc_t *bdp, | |
332 | struct file *infilp, | |
cbb7e577 | 333 | loff_t *ppos, |
3a326a2c | 334 | struct pipe_inode_info *pipe, |
1b895840 NS |
335 | size_t count, |
336 | int flags, | |
337 | int ioflags, | |
338 | cred_t *credp) | |
339 | { | |
340 | xfs_inode_t *ip = XFS_BHVTOI(bdp); | |
341 | xfs_mount_t *mp = ip->i_mount; | |
342 | ssize_t ret; | |
1da177e4 | 343 | |
1b895840 NS |
344 | XFS_STATS_INC(xs_read_calls); |
345 | if (XFS_FORCED_SHUTDOWN(ip->i_mount)) | |
346 | return -EIO; | |
347 | ||
348 | xfs_ilock(ip, XFS_IOLOCK_SHARED); | |
349 | ||
350 | if (DM_EVENT_ENABLED(BHV_TO_VNODE(bdp)->v_vfsp, ip, DM_EVENT_READ) && | |
351 | (!(ioflags & IO_INVIS))) { | |
8285fb58 | 352 | bhv_vrwlock_t locktype = VRWLOCK_READ; |
1b895840 NS |
353 | int error; |
354 | ||
355 | error = XFS_SEND_DATA(mp, DM_EVENT_READ, BHV_TO_VNODE(bdp), | |
cbb7e577 | 356 | *ppos, count, |
1b895840 NS |
357 | FILP_DELAY_FLAG(infilp), &locktype); |
358 | if (error) { | |
359 | xfs_iunlock(ip, XFS_IOLOCK_SHARED); | |
360 | return -error; | |
361 | } | |
362 | } | |
363 | xfs_rw_enter_trace(XFS_SPLICE_READ_ENTER, &ip->i_iocore, | |
cbb7e577 JA |
364 | pipe, count, *ppos, ioflags); |
365 | ret = generic_file_splice_read(infilp, ppos, pipe, count, flags); | |
1da177e4 LT |
366 | if (ret > 0) |
367 | XFS_STATS_ADD(xs_read_bytes, ret); | |
368 | ||
1b895840 NS |
369 | xfs_iunlock(ip, XFS_IOLOCK_SHARED); |
370 | return ret; | |
371 | } | |
372 | ||
373 | ssize_t | |
374 | xfs_splice_write( | |
375 | bhv_desc_t *bdp, | |
3a326a2c | 376 | struct pipe_inode_info *pipe, |
1b895840 | 377 | struct file *outfilp, |
cbb7e577 | 378 | loff_t *ppos, |
1b895840 NS |
379 | size_t count, |
380 | int flags, | |
381 | int ioflags, | |
382 | cred_t *credp) | |
383 | { | |
384 | xfs_inode_t *ip = XFS_BHVTOI(bdp); | |
385 | xfs_mount_t *mp = ip->i_mount; | |
386 | ssize_t ret; | |
0a8d17d0 DC |
387 | struct inode *inode = outfilp->f_mapping->host; |
388 | xfs_fsize_t isize; | |
1b895840 NS |
389 | |
390 | XFS_STATS_INC(xs_write_calls); | |
391 | if (XFS_FORCED_SHUTDOWN(ip->i_mount)) | |
392 | return -EIO; | |
393 | ||
394 | xfs_ilock(ip, XFS_IOLOCK_EXCL); | |
395 | ||
396 | if (DM_EVENT_ENABLED(BHV_TO_VNODE(bdp)->v_vfsp, ip, DM_EVENT_WRITE) && | |
397 | (!(ioflags & IO_INVIS))) { | |
8285fb58 | 398 | bhv_vrwlock_t locktype = VRWLOCK_WRITE; |
1b895840 NS |
399 | int error; |
400 | ||
401 | error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, BHV_TO_VNODE(bdp), | |
cbb7e577 | 402 | *ppos, count, |
1b895840 NS |
403 | FILP_DELAY_FLAG(outfilp), &locktype); |
404 | if (error) { | |
405 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
406 | return -error; | |
407 | } | |
408 | } | |
409 | xfs_rw_enter_trace(XFS_SPLICE_WRITE_ENTER, &ip->i_iocore, | |
cbb7e577 JA |
410 | pipe, count, *ppos, ioflags); |
411 | ret = generic_file_splice_write(pipe, outfilp, ppos, count, flags); | |
1b895840 NS |
412 | if (ret > 0) |
413 | XFS_STATS_ADD(xs_write_bytes, ret); | |
414 | ||
0a8d17d0 DC |
415 | isize = i_size_read(inode); |
416 | if (unlikely(ret < 0 && ret != -EFAULT && *ppos > isize)) | |
417 | *ppos = isize; | |
418 | ||
419 | if (*ppos > ip->i_d.di_size) { | |
420 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
421 | if (*ppos > ip->i_d.di_size) { | |
422 | ip->i_d.di_size = *ppos; | |
423 | i_size_write(inode, *ppos); | |
424 | ip->i_update_core = 1; | |
425 | ip->i_update_size = 1; | |
426 | } | |
427 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
428 | } | |
1b895840 | 429 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
1da177e4 LT |
430 | return ret; |
431 | } | |
432 | ||
433 | /* | |
434 | * This routine is called to handle zeroing any space in the last | |
435 | * block of the file that is beyond the EOF. We do this since the | |
436 | * size is being increased without writing anything to that block | |
437 | * and we don't want anyone to read the garbage on the disk. | |
438 | */ | |
439 | STATIC int /* error (positive) */ | |
440 | xfs_zero_last_block( | |
441 | struct inode *ip, | |
442 | xfs_iocore_t *io, | |
68160161 LM |
443 | xfs_fsize_t offset, |
444 | xfs_fsize_t isize) | |
1da177e4 LT |
445 | { |
446 | xfs_fileoff_t last_fsb; | |
1b895840 | 447 | xfs_mount_t *mp = io->io_mount; |
1da177e4 LT |
448 | int nimaps; |
449 | int zero_offset; | |
450 | int zero_len; | |
1da177e4 LT |
451 | int error = 0; |
452 | xfs_bmbt_irec_t imap; | |
1da177e4 LT |
453 | |
454 | ASSERT(ismrlocked(io->io_lock, MR_UPDATE) != 0); | |
1da177e4 | 455 | |
24ee8088 ES |
456 | zero_offset = XFS_B_FSB_OFFSET(mp, isize); |
457 | if (zero_offset == 0) { | |
1da177e4 LT |
458 | /* |
459 | * There are no extra bytes in the last block on disk to | |
460 | * zero, so return. | |
461 | */ | |
462 | return 0; | |
463 | } | |
464 | ||
465 | last_fsb = XFS_B_TO_FSBT(mp, isize); | |
466 | nimaps = 1; | |
467 | error = XFS_BMAPI(mp, NULL, io, last_fsb, 1, 0, NULL, 0, &imap, | |
3e57ecf6 | 468 | &nimaps, NULL, NULL); |
1da177e4 LT |
469 | if (error) { |
470 | return error; | |
471 | } | |
472 | ASSERT(nimaps > 0); | |
473 | /* | |
474 | * If the block underlying isize is just a hole, then there | |
475 | * is nothing to zero. | |
476 | */ | |
477 | if (imap.br_startblock == HOLESTARTBLOCK) { | |
478 | return 0; | |
479 | } | |
480 | /* | |
481 | * Zero the part of the last block beyond the EOF, and write it | |
482 | * out sync. We need to drop the ilock while we do this so we | |
483 | * don't deadlock when the buffer cache calls back to us. | |
484 | */ | |
485 | XFS_IUNLOCK(mp, io, XFS_ILOCK_EXCL| XFS_EXTSIZE_RD); | |
1da177e4 | 486 | |
24ee8088 | 487 | zero_len = mp->m_sb.sb_blocksize - zero_offset; |
68160161 LM |
488 | if (isize + zero_len > offset) |
489 | zero_len = offset - isize; | |
490 | error = xfs_iozero(ip, isize, zero_len); | |
1da177e4 LT |
491 | |
492 | XFS_ILOCK(mp, io, XFS_ILOCK_EXCL|XFS_EXTSIZE_RD); | |
493 | ASSERT(error >= 0); | |
494 | return error; | |
495 | } | |
496 | ||
497 | /* | |
498 | * Zero any on disk space between the current EOF and the new, | |
499 | * larger EOF. This handles the normal case of zeroing the remainder | |
500 | * of the last block in the file and the unusual case of zeroing blocks | |
501 | * out beyond the size of the file. This second case only happens | |
502 | * with fixed size extents and when the system crashes before the inode | |
503 | * size was updated but after blocks were allocated. If fill is set, | |
504 | * then any holes in the range are filled and zeroed. If not, the holes | |
505 | * are left alone as holes. | |
506 | */ | |
507 | ||
508 | int /* error (positive) */ | |
509 | xfs_zero_eof( | |
67fcaa73 | 510 | bhv_vnode_t *vp, |
1da177e4 LT |
511 | xfs_iocore_t *io, |
512 | xfs_off_t offset, /* starting I/O offset */ | |
68160161 | 513 | xfs_fsize_t isize) /* current inode size */ |
1da177e4 | 514 | { |
ec86dc02 | 515 | struct inode *ip = vn_to_inode(vp); |
1da177e4 LT |
516 | xfs_fileoff_t start_zero_fsb; |
517 | xfs_fileoff_t end_zero_fsb; | |
1da177e4 LT |
518 | xfs_fileoff_t zero_count_fsb; |
519 | xfs_fileoff_t last_fsb; | |
68160161 LM |
520 | xfs_fileoff_t zero_off; |
521 | xfs_fsize_t zero_len; | |
1b895840 | 522 | xfs_mount_t *mp = io->io_mount; |
1da177e4 LT |
523 | int nimaps; |
524 | int error = 0; | |
525 | xfs_bmbt_irec_t imap; | |
1da177e4 LT |
526 | |
527 | ASSERT(ismrlocked(io->io_lock, MR_UPDATE)); | |
528 | ASSERT(ismrlocked(io->io_iolock, MR_UPDATE)); | |
24ee8088 | 529 | ASSERT(offset > isize); |
1da177e4 | 530 | |
1da177e4 LT |
531 | /* |
532 | * First handle zeroing the block on which isize resides. | |
533 | * We only zero a part of that block so it is handled specially. | |
534 | */ | |
68160161 | 535 | error = xfs_zero_last_block(ip, io, offset, isize); |
1da177e4 LT |
536 | if (error) { |
537 | ASSERT(ismrlocked(io->io_lock, MR_UPDATE)); | |
538 | ASSERT(ismrlocked(io->io_iolock, MR_UPDATE)); | |
539 | return error; | |
540 | } | |
541 | ||
542 | /* | |
543 | * Calculate the range between the new size and the old | |
544 | * where blocks needing to be zeroed may exist. To get the | |
545 | * block where the last byte in the file currently resides, | |
546 | * we need to subtract one from the size and truncate back | |
547 | * to a block boundary. We subtract 1 in case the size is | |
548 | * exactly on a block boundary. | |
549 | */ | |
550 | last_fsb = isize ? XFS_B_TO_FSBT(mp, isize - 1) : (xfs_fileoff_t)-1; | |
551 | start_zero_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)isize); | |
552 | end_zero_fsb = XFS_B_TO_FSBT(mp, offset - 1); | |
553 | ASSERT((xfs_sfiloff_t)last_fsb < (xfs_sfiloff_t)start_zero_fsb); | |
554 | if (last_fsb == end_zero_fsb) { | |
555 | /* | |
556 | * The size was only incremented on its last block. | |
557 | * We took care of that above, so just return. | |
558 | */ | |
559 | return 0; | |
560 | } | |
561 | ||
562 | ASSERT(start_zero_fsb <= end_zero_fsb); | |
1da177e4 LT |
563 | while (start_zero_fsb <= end_zero_fsb) { |
564 | nimaps = 1; | |
565 | zero_count_fsb = end_zero_fsb - start_zero_fsb + 1; | |
566 | error = XFS_BMAPI(mp, NULL, io, start_zero_fsb, zero_count_fsb, | |
3e57ecf6 | 567 | 0, NULL, 0, &imap, &nimaps, NULL, NULL); |
1da177e4 LT |
568 | if (error) { |
569 | ASSERT(ismrlocked(io->io_lock, MR_UPDATE)); | |
570 | ASSERT(ismrlocked(io->io_iolock, MR_UPDATE)); | |
571 | return error; | |
572 | } | |
573 | ASSERT(nimaps > 0); | |
574 | ||
575 | if (imap.br_state == XFS_EXT_UNWRITTEN || | |
576 | imap.br_startblock == HOLESTARTBLOCK) { | |
577 | /* | |
578 | * This loop handles initializing pages that were | |
579 | * partially initialized by the code below this | |
580 | * loop. It basically zeroes the part of the page | |
581 | * that sits on a hole and sets the page as P_HOLE | |
582 | * and calls remapf if it is a mapped file. | |
583 | */ | |
24ee8088 | 584 | start_zero_fsb = imap.br_startoff + imap.br_blockcount; |
1da177e4 LT |
585 | ASSERT(start_zero_fsb <= (end_zero_fsb + 1)); |
586 | continue; | |
587 | } | |
588 | ||
589 | /* | |
3d80ede4 | 590 | * There are blocks we need to zero. |
1da177e4 LT |
591 | * Drop the inode lock while we're doing the I/O. |
592 | * We'll still have the iolock to protect us. | |
593 | */ | |
594 | XFS_IUNLOCK(mp, io, XFS_ILOCK_EXCL|XFS_EXTSIZE_RD); | |
595 | ||
68160161 LM |
596 | zero_off = XFS_FSB_TO_B(mp, start_zero_fsb); |
597 | zero_len = XFS_FSB_TO_B(mp, imap.br_blockcount); | |
598 | ||
599 | if ((zero_off + zero_len) > offset) | |
600 | zero_len = offset - zero_off; | |
601 | ||
602 | error = xfs_iozero(ip, zero_off, zero_len); | |
1da177e4 LT |
603 | if (error) { |
604 | goto out_lock; | |
605 | } | |
606 | ||
3d80ede4 | 607 | start_zero_fsb = imap.br_startoff + imap.br_blockcount; |
1da177e4 LT |
608 | ASSERT(start_zero_fsb <= (end_zero_fsb + 1)); |
609 | ||
610 | XFS_ILOCK(mp, io, XFS_ILOCK_EXCL|XFS_EXTSIZE_RD); | |
611 | } | |
612 | ||
613 | return 0; | |
614 | ||
615 | out_lock: | |
616 | ||
617 | XFS_ILOCK(mp, io, XFS_ILOCK_EXCL|XFS_EXTSIZE_RD); | |
618 | ASSERT(error >= 0); | |
619 | return error; | |
620 | } | |
621 | ||
622 | ssize_t /* bytes written, or (-) error */ | |
623 | xfs_write( | |
624 | bhv_desc_t *bdp, | |
625 | struct kiocb *iocb, | |
626 | const struct iovec *iovp, | |
627 | unsigned int nsegs, | |
628 | loff_t *offset, | |
629 | int ioflags, | |
630 | cred_t *credp) | |
631 | { | |
632 | struct file *file = iocb->ki_filp; | |
633 | struct address_space *mapping = file->f_mapping; | |
634 | struct inode *inode = mapping->host; | |
635 | unsigned long segs = nsegs; | |
636 | xfs_inode_t *xip; | |
637 | xfs_mount_t *mp; | |
638 | ssize_t ret = 0, error = 0; | |
639 | xfs_fsize_t isize, new_size; | |
640 | xfs_iocore_t *io; | |
67fcaa73 | 641 | bhv_vnode_t *vp; |
1da177e4 LT |
642 | unsigned long seg; |
643 | int iolock; | |
644 | int eventsent = 0; | |
8285fb58 | 645 | bhv_vrwlock_t locktype; |
1da177e4 LT |
646 | size_t ocount = 0, count; |
647 | loff_t pos; | |
a13828b1 | 648 | int need_i_mutex = 1, need_flush = 0; |
1da177e4 LT |
649 | |
650 | XFS_STATS_INC(xs_write_calls); | |
651 | ||
652 | vp = BHV_TO_VNODE(bdp); | |
653 | xip = XFS_BHVTOI(bdp); | |
654 | ||
655 | for (seg = 0; seg < segs; seg++) { | |
656 | const struct iovec *iv = &iovp[seg]; | |
657 | ||
658 | /* | |
659 | * If any segment has a negative length, or the cumulative | |
660 | * length ever wraps negative then return -EINVAL. | |
661 | */ | |
662 | ocount += iv->iov_len; | |
663 | if (unlikely((ssize_t)(ocount|iv->iov_len) < 0)) | |
664 | return -EINVAL; | |
665 | if (access_ok(VERIFY_READ, iv->iov_base, iv->iov_len)) | |
666 | continue; | |
667 | if (seg == 0) | |
668 | return -EFAULT; | |
669 | segs = seg; | |
670 | ocount -= iv->iov_len; /* This segment is no good */ | |
671 | break; | |
672 | } | |
673 | ||
674 | count = ocount; | |
675 | pos = *offset; | |
676 | ||
677 | if (count == 0) | |
678 | return 0; | |
679 | ||
680 | io = &xip->i_iocore; | |
681 | mp = io->io_mount; | |
682 | ||
34327e13 NS |
683 | vfs_wait_for_freeze(vp->v_vfsp, SB_FREEZE_WRITE); |
684 | ||
1da177e4 LT |
685 | if (XFS_FORCED_SHUTDOWN(mp)) |
686 | return -EIO; | |
687 | ||
1da177e4 LT |
688 | if (ioflags & IO_ISDIRECT) { |
689 | xfs_buftarg_t *target = | |
690 | (xip->i_d.di_flags & XFS_DIFLAG_REALTIME) ? | |
691 | mp->m_rtdev_targp : mp->m_ddev_targp; | |
692 | ||
ce8e922c | 693 | if ((pos & target->bt_smask) || (count & target->bt_smask)) |
1da177e4 LT |
694 | return XFS_ERROR(-EINVAL); |
695 | ||
696 | if (!VN_CACHED(vp) && pos < i_size_read(inode)) | |
a13828b1 | 697 | need_i_mutex = 0; |
1da177e4 LT |
698 | |
699 | if (VN_CACHED(vp)) | |
700 | need_flush = 1; | |
701 | } | |
702 | ||
703 | relock: | |
a13828b1 | 704 | if (need_i_mutex) { |
1da177e4 LT |
705 | iolock = XFS_IOLOCK_EXCL; |
706 | locktype = VRWLOCK_WRITE; | |
707 | ||
1b1dcc1b | 708 | mutex_lock(&inode->i_mutex); |
1da177e4 LT |
709 | } else { |
710 | iolock = XFS_IOLOCK_SHARED; | |
711 | locktype = VRWLOCK_WRITE_DIRECT; | |
712 | } | |
713 | ||
714 | xfs_ilock(xip, XFS_ILOCK_EXCL|iolock); | |
715 | ||
716 | isize = i_size_read(inode); | |
717 | ||
718 | if (file->f_flags & O_APPEND) | |
719 | *offset = isize; | |
720 | ||
721 | start: | |
722 | error = -generic_write_checks(file, &pos, &count, | |
723 | S_ISBLK(inode->i_mode)); | |
724 | if (error) { | |
725 | xfs_iunlock(xip, XFS_ILOCK_EXCL|iolock); | |
a13828b1 | 726 | goto out_unlock_mutex; |
1da177e4 LT |
727 | } |
728 | ||
729 | new_size = pos + count; | |
730 | if (new_size > isize) | |
731 | io->io_new_size = new_size; | |
732 | ||
733 | if ((DM_EVENT_ENABLED(vp->v_vfsp, xip, DM_EVENT_WRITE) && | |
734 | !(ioflags & IO_INVIS) && !eventsent)) { | |
735 | loff_t savedsize = pos; | |
736 | int dmflags = FILP_DELAY_FLAG(file); | |
737 | ||
a13828b1 | 738 | if (need_i_mutex) |
1b1dcc1b | 739 | dmflags |= DM_FLAGS_IMUX; |
1da177e4 LT |
740 | |
741 | xfs_iunlock(xip, XFS_ILOCK_EXCL); | |
742 | error = XFS_SEND_DATA(xip->i_mount, DM_EVENT_WRITE, vp, | |
743 | pos, count, | |
744 | dmflags, &locktype); | |
745 | if (error) { | |
746 | xfs_iunlock(xip, iolock); | |
a13828b1 | 747 | goto out_unlock_mutex; |
1da177e4 LT |
748 | } |
749 | xfs_ilock(xip, XFS_ILOCK_EXCL); | |
750 | eventsent = 1; | |
751 | ||
752 | /* | |
c41564b5 | 753 | * The iolock was dropped and reacquired in XFS_SEND_DATA |
1da177e4 LT |
754 | * so we have to recheck the size when appending. |
755 | * We will only "goto start;" once, since having sent the | |
756 | * event prevents another call to XFS_SEND_DATA, which is | |
757 | * what allows the size to change in the first place. | |
758 | */ | |
759 | if ((file->f_flags & O_APPEND) && savedsize != isize) { | |
760 | pos = isize = xip->i_d.di_size; | |
761 | goto start; | |
762 | } | |
763 | } | |
764 | ||
4aeb664c | 765 | if (likely(!(ioflags & IO_INVIS))) { |
870f4817 | 766 | file_update_time(file); |
4aeb664c NS |
767 | xfs_ichgtime_fast(xip, inode, |
768 | XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
1da177e4 LT |
769 | } |
770 | ||
771 | /* | |
772 | * If the offset is beyond the size of the file, we have a couple | |
773 | * of things to do. First, if there is already space allocated | |
774 | * we need to either create holes or zero the disk or ... | |
775 | * | |
776 | * If there is a page where the previous size lands, we need | |
777 | * to zero it out up to the new size. | |
778 | */ | |
779 | ||
780 | if (pos > isize) { | |
68160161 | 781 | error = xfs_zero_eof(BHV_TO_VNODE(bdp), io, pos, isize); |
1da177e4 LT |
782 | if (error) { |
783 | xfs_iunlock(xip, XFS_ILOCK_EXCL|iolock); | |
a13828b1 | 784 | goto out_unlock_mutex; |
1da177e4 LT |
785 | } |
786 | } | |
787 | xfs_iunlock(xip, XFS_ILOCK_EXCL); | |
788 | ||
789 | /* | |
790 | * If we're writing the file then make sure to clear the | |
791 | * setuid and setgid bits if the process is not being run | |
792 | * by root. This keeps people from modifying setuid and | |
793 | * setgid binaries. | |
794 | */ | |
795 | ||
796 | if (((xip->i_d.di_mode & S_ISUID) || | |
797 | ((xip->i_d.di_mode & (S_ISGID | S_IXGRP)) == | |
798 | (S_ISGID | S_IXGRP))) && | |
799 | !capable(CAP_FSETID)) { | |
800 | error = xfs_write_clear_setuid(xip); | |
801 | if (likely(!error)) | |
e678fb0d | 802 | error = -remove_suid(file->f_path.dentry); |
1da177e4 LT |
803 | if (unlikely(error)) { |
804 | xfs_iunlock(xip, iolock); | |
a13828b1 | 805 | goto out_unlock_mutex; |
1da177e4 LT |
806 | } |
807 | } | |
808 | ||
809 | retry: | |
810 | /* We can write back this queue in page reclaim */ | |
811 | current->backing_dev_info = mapping->backing_dev_info; | |
812 | ||
813 | if ((ioflags & IO_ISDIRECT)) { | |
814 | if (need_flush) { | |
815 | xfs_inval_cached_trace(io, pos, -1, | |
816 | ctooff(offtoct(pos)), -1); | |
67fcaa73 | 817 | bhv_vop_flushinval_pages(vp, ctooff(offtoct(pos)), |
1da177e4 LT |
818 | -1, FI_REMAPF_LOCKED); |
819 | } | |
820 | ||
a13828b1 | 821 | if (need_i_mutex) { |
1da177e4 LT |
822 | /* demote the lock now the cached pages are gone */ |
823 | XFS_ILOCK_DEMOTE(mp, io, XFS_IOLOCK_EXCL); | |
1b1dcc1b | 824 | mutex_unlock(&inode->i_mutex); |
1da177e4 LT |
825 | |
826 | iolock = XFS_IOLOCK_SHARED; | |
827 | locktype = VRWLOCK_WRITE_DIRECT; | |
a13828b1 | 828 | need_i_mutex = 0; |
1da177e4 LT |
829 | } |
830 | ||
831 | xfs_rw_enter_trace(XFS_DIOWR_ENTER, io, (void *)iovp, segs, | |
832 | *offset, ioflags); | |
833 | ret = generic_file_direct_write(iocb, iovp, | |
834 | &segs, pos, offset, count, ocount); | |
835 | ||
836 | /* | |
837 | * direct-io write to a hole: fall through to buffered I/O | |
838 | * for completing the rest of the request. | |
839 | */ | |
840 | if (ret >= 0 && ret != count) { | |
841 | XFS_STATS_ADD(xs_write_bytes, ret); | |
842 | ||
843 | pos += ret; | |
844 | count -= ret; | |
845 | ||
a13828b1 | 846 | need_i_mutex = 1; |
1da177e4 LT |
847 | ioflags &= ~IO_ISDIRECT; |
848 | xfs_iunlock(xip, iolock); | |
849 | goto relock; | |
850 | } | |
851 | } else { | |
852 | xfs_rw_enter_trace(XFS_WRITE_ENTER, io, (void *)iovp, segs, | |
853 | *offset, ioflags); | |
854 | ret = generic_file_buffered_write(iocb, iovp, segs, | |
855 | pos, offset, count, ret); | |
856 | } | |
857 | ||
858 | current->backing_dev_info = NULL; | |
859 | ||
860 | if (ret == -EIOCBQUEUED && !(ioflags & IO_ISAIO)) | |
861 | ret = wait_on_sync_kiocb(iocb); | |
862 | ||
863 | if ((ret == -ENOSPC) && | |
864 | DM_EVENT_ENABLED(vp->v_vfsp, xip, DM_EVENT_NOSPACE) && | |
865 | !(ioflags & IO_INVIS)) { | |
866 | ||
867 | xfs_rwunlock(bdp, locktype); | |
a13828b1 | 868 | if (need_i_mutex) |
1b1dcc1b | 869 | mutex_unlock(&inode->i_mutex); |
1da177e4 LT |
870 | error = XFS_SEND_NAMESP(xip->i_mount, DM_EVENT_NOSPACE, vp, |
871 | DM_RIGHT_NULL, vp, DM_RIGHT_NULL, NULL, NULL, | |
872 | 0, 0, 0); /* Delay flag intentionally unused */ | |
873 | if (error) | |
e1a40fa9 | 874 | goto out_nounlocks; |
a13828b1 | 875 | if (need_i_mutex) |
1b1dcc1b | 876 | mutex_lock(&inode->i_mutex); |
1da177e4 LT |
877 | xfs_rwlock(bdp, locktype); |
878 | pos = xip->i_d.di_size; | |
879 | ret = 0; | |
880 | goto retry; | |
881 | } | |
882 | ||
68bdb6ea YL |
883 | isize = i_size_read(inode); |
884 | if (unlikely(ret < 0 && ret != -EFAULT && *offset > isize)) | |
885 | *offset = isize; | |
886 | ||
1da177e4 LT |
887 | if (*offset > xip->i_d.di_size) { |
888 | xfs_ilock(xip, XFS_ILOCK_EXCL); | |
889 | if (*offset > xip->i_d.di_size) { | |
890 | xip->i_d.di_size = *offset; | |
891 | i_size_write(inode, *offset); | |
892 | xip->i_update_core = 1; | |
893 | xip->i_update_size = 1; | |
894 | } | |
895 | xfs_iunlock(xip, XFS_ILOCK_EXCL); | |
896 | } | |
897 | ||
898 | error = -ret; | |
899 | if (ret <= 0) | |
900 | goto out_unlock_internal; | |
901 | ||
902 | XFS_STATS_ADD(xs_write_bytes, ret); | |
903 | ||
904 | /* Handle various SYNC-type writes */ | |
905 | if ((file->f_flags & O_SYNC) || IS_SYNC(inode)) { | |
1e69dd0e NS |
906 | error = xfs_write_sync_logforce(mp, xip); |
907 | if (error) | |
908 | goto out_unlock_internal; | |
a13828b1 | 909 | |
1da177e4 | 910 | xfs_rwunlock(bdp, locktype); |
a13828b1 | 911 | if (need_i_mutex) |
1b1dcc1b | 912 | mutex_unlock(&inode->i_mutex); |
1da177e4 LT |
913 | |
914 | error = sync_page_range(inode, mapping, pos, ret); | |
915 | if (!error) | |
916 | error = ret; | |
917 | return error; | |
918 | } | |
919 | ||
920 | out_unlock_internal: | |
921 | xfs_rwunlock(bdp, locktype); | |
a13828b1 NS |
922 | out_unlock_mutex: |
923 | if (need_i_mutex) | |
1b1dcc1b | 924 | mutex_unlock(&inode->i_mutex); |
e1a40fa9 | 925 | out_nounlocks: |
1da177e4 LT |
926 | return -error; |
927 | } | |
928 | ||
929 | /* | |
930 | * All xfs metadata buffers except log state machine buffers | |
931 | * get this attached as their b_bdstrat callback function. | |
932 | * This is so that we can catch a buffer | |
933 | * after prematurely unpinning it to forcibly shutdown the filesystem. | |
934 | */ | |
935 | int | |
936 | xfs_bdstrat_cb(struct xfs_buf *bp) | |
937 | { | |
938 | xfs_mount_t *mp; | |
939 | ||
940 | mp = XFS_BUF_FSPRIVATE3(bp, xfs_mount_t *); | |
941 | if (!XFS_FORCED_SHUTDOWN(mp)) { | |
ce8e922c | 942 | xfs_buf_iorequest(bp); |
1da177e4 LT |
943 | return 0; |
944 | } else { | |
945 | xfs_buftrace("XFS__BDSTRAT IOERROR", bp); | |
946 | /* | |
947 | * Metadata write that didn't get logged but | |
948 | * written delayed anyway. These aren't associated | |
949 | * with a transaction, and can be ignored. | |
950 | */ | |
951 | if (XFS_BUF_IODONE_FUNC(bp) == NULL && | |
952 | (XFS_BUF_ISREAD(bp)) == 0) | |
953 | return (xfs_bioerror_relse(bp)); | |
954 | else | |
955 | return (xfs_bioerror(bp)); | |
956 | } | |
957 | } | |
958 | ||
959 | ||
960 | int | |
961 | xfs_bmap(bhv_desc_t *bdp, | |
962 | xfs_off_t offset, | |
963 | ssize_t count, | |
964 | int flags, | |
965 | xfs_iomap_t *iomapp, | |
966 | int *niomaps) | |
967 | { | |
968 | xfs_inode_t *ip = XFS_BHVTOI(bdp); | |
969 | xfs_iocore_t *io = &ip->i_iocore; | |
970 | ||
971 | ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFREG); | |
972 | ASSERT(((ip->i_d.di_flags & XFS_DIFLAG_REALTIME) != 0) == | |
973 | ((ip->i_iocore.io_flags & XFS_IOCORE_RT) != 0)); | |
974 | ||
975 | return xfs_iomap(io, offset, count, flags, iomapp, niomaps); | |
976 | } | |
977 | ||
978 | /* | |
979 | * Wrapper around bdstrat so that we can stop data | |
980 | * from going to disk in case we are shutting down the filesystem. | |
981 | * Typically user data goes thru this path; one of the exceptions | |
982 | * is the superblock. | |
983 | */ | |
984 | int | |
985 | xfsbdstrat( | |
986 | struct xfs_mount *mp, | |
987 | struct xfs_buf *bp) | |
988 | { | |
989 | ASSERT(mp); | |
990 | if (!XFS_FORCED_SHUTDOWN(mp)) { | |
991 | /* Grio redirection would go here | |
992 | * if (XFS_BUF_IS_GRIO(bp)) { | |
993 | */ | |
994 | ||
ce8e922c | 995 | xfs_buf_iorequest(bp); |
1da177e4 LT |
996 | return 0; |
997 | } | |
998 | ||
999 | xfs_buftrace("XFSBDSTRAT IOERROR", bp); | |
1000 | return (xfs_bioerror_relse(bp)); | |
1001 | } | |
1002 | ||
1003 | /* | |
1004 | * If the underlying (data/log/rt) device is readonly, there are some | |
1005 | * operations that cannot proceed. | |
1006 | */ | |
1007 | int | |
1008 | xfs_dev_is_read_only( | |
1009 | xfs_mount_t *mp, | |
1010 | char *message) | |
1011 | { | |
1012 | if (xfs_readonly_buftarg(mp->m_ddev_targp) || | |
1013 | xfs_readonly_buftarg(mp->m_logdev_targp) || | |
1014 | (mp->m_rtdev_targp && xfs_readonly_buftarg(mp->m_rtdev_targp))) { | |
1015 | cmn_err(CE_NOTE, | |
1016 | "XFS: %s required on read-only device.", message); | |
1017 | cmn_err(CE_NOTE, | |
1018 | "XFS: write access unavailable, cannot proceed."); | |
1019 | return EROFS; | |
1020 | } | |
1021 | return 0; | |
1022 | } |