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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2005 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" |
dda35b8f | 19 | #include "xfs_fs.h" |
a844f451 | 20 | #include "xfs_bit.h" |
1da177e4 | 21 | #include "xfs_log.h" |
a844f451 | 22 | #include "xfs_inum.h" |
1da177e4 | 23 | #include "xfs_sb.h" |
a844f451 | 24 | #include "xfs_ag.h" |
1da177e4 LT |
25 | #include "xfs_dir2.h" |
26 | #include "xfs_trans.h" | |
27 | #include "xfs_dmapi.h" | |
28 | #include "xfs_mount.h" | |
29 | #include "xfs_bmap_btree.h" | |
30 | #include "xfs_alloc_btree.h" | |
31 | #include "xfs_ialloc_btree.h" | |
32 | #include "xfs_alloc.h" | |
33 | #include "xfs_btree.h" | |
34 | #include "xfs_attr_sf.h" | |
1da177e4 LT |
35 | #include "xfs_dir2_sf.h" |
36 | #include "xfs_dinode.h" | |
37 | #include "xfs_inode.h" | |
fd3200be | 38 | #include "xfs_inode_item.h" |
dda35b8f | 39 | #include "xfs_bmap.h" |
1da177e4 LT |
40 | #include "xfs_error.h" |
41 | #include "xfs_rw.h" | |
739bfb2a | 42 | #include "xfs_vnodeops.h" |
f999a5bf | 43 | #include "xfs_da_btree.h" |
ddcd856d | 44 | #include "xfs_ioctl.h" |
dda35b8f | 45 | #include "xfs_trace.h" |
1da177e4 LT |
46 | |
47 | #include <linux/dcache.h> | |
1da177e4 | 48 | |
f0f37e2f | 49 | static const struct vm_operations_struct xfs_file_vm_ops; |
1da177e4 | 50 | |
dda35b8f CH |
51 | /* |
52 | * xfs_iozero | |
53 | * | |
54 | * xfs_iozero clears the specified range of buffer supplied, | |
55 | * and marks all the affected blocks as valid and modified. If | |
56 | * an affected block is not allocated, it will be allocated. If | |
57 | * an affected block is not completely overwritten, and is not | |
58 | * valid before the operation, it will be read from disk before | |
59 | * being partially zeroed. | |
60 | */ | |
61 | STATIC int | |
62 | xfs_iozero( | |
63 | struct xfs_inode *ip, /* inode */ | |
64 | loff_t pos, /* offset in file */ | |
65 | size_t count) /* size of data to zero */ | |
66 | { | |
67 | struct page *page; | |
68 | struct address_space *mapping; | |
69 | int status; | |
70 | ||
71 | mapping = VFS_I(ip)->i_mapping; | |
72 | do { | |
73 | unsigned offset, bytes; | |
74 | void *fsdata; | |
75 | ||
76 | offset = (pos & (PAGE_CACHE_SIZE -1)); /* Within page */ | |
77 | bytes = PAGE_CACHE_SIZE - offset; | |
78 | if (bytes > count) | |
79 | bytes = count; | |
80 | ||
81 | status = pagecache_write_begin(NULL, mapping, pos, bytes, | |
82 | AOP_FLAG_UNINTERRUPTIBLE, | |
83 | &page, &fsdata); | |
84 | if (status) | |
85 | break; | |
86 | ||
87 | zero_user(page, offset, bytes); | |
88 | ||
89 | status = pagecache_write_end(NULL, mapping, pos, bytes, bytes, | |
90 | page, fsdata); | |
91 | WARN_ON(status <= 0); /* can't return less than zero! */ | |
92 | pos += bytes; | |
93 | count -= bytes; | |
94 | status = 0; | |
95 | } while (count); | |
96 | ||
97 | return (-status); | |
98 | } | |
99 | ||
fd3200be CH |
100 | STATIC int |
101 | xfs_file_fsync( | |
102 | struct file *file, | |
103 | struct dentry *dentry, | |
104 | int datasync) | |
105 | { | |
106 | struct xfs_inode *ip = XFS_I(dentry->d_inode); | |
107 | struct xfs_trans *tp; | |
108 | int error = 0; | |
109 | int log_flushed = 0; | |
110 | ||
111 | xfs_itrace_entry(ip); | |
112 | ||
113 | if (XFS_FORCED_SHUTDOWN(ip->i_mount)) | |
114 | return -XFS_ERROR(EIO); | |
115 | ||
116 | xfs_iflags_clear(ip, XFS_ITRUNCATED); | |
117 | ||
118 | /* | |
119 | * We always need to make sure that the required inode state is safe on | |
120 | * disk. The inode might be clean but we still might need to force the | |
121 | * log because of committed transactions that haven't hit the disk yet. | |
122 | * Likewise, there could be unflushed non-transactional changes to the | |
123 | * inode core that have to go to disk and this requires us to issue | |
124 | * a synchronous transaction to capture these changes correctly. | |
125 | * | |
126 | * This code relies on the assumption that if the i_update_core field | |
127 | * of the inode is clear and the inode is unpinned then it is clean | |
128 | * and no action is required. | |
129 | */ | |
130 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
131 | ||
66d834ea CH |
132 | /* |
133 | * First check if the VFS inode is marked dirty. All the dirtying | |
134 | * of non-transactional updates no goes through mark_inode_dirty*, | |
135 | * which allows us to distinguish beteeen pure timestamp updates | |
136 | * and i_size updates which need to be caught for fdatasync. | |
137 | * After that also theck for the dirty state in the XFS inode, which | |
138 | * might gets cleared when the inode gets written out via the AIL | |
139 | * or xfs_iflush_cluster. | |
140 | */ | |
141 | if (((dentry->d_inode->i_state & I_DIRTY_DATASYNC) || | |
142 | ((dentry->d_inode->i_state & I_DIRTY_SYNC) && !datasync)) && | |
143 | ip->i_update_core) { | |
fd3200be CH |
144 | /* |
145 | * Kick off a transaction to log the inode core to get the | |
146 | * updates. The sync transaction will also force the log. | |
147 | */ | |
148 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
149 | tp = xfs_trans_alloc(ip->i_mount, XFS_TRANS_FSYNC_TS); | |
150 | error = xfs_trans_reserve(tp, 0, | |
151 | XFS_FSYNC_TS_LOG_RES(ip->i_mount), 0, 0, 0); | |
152 | if (error) { | |
153 | xfs_trans_cancel(tp, 0); | |
154 | return -error; | |
155 | } | |
156 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
157 | ||
158 | /* | |
159 | * Note - it's possible that we might have pushed ourselves out | |
160 | * of the way during trans_reserve which would flush the inode. | |
161 | * But there's no guarantee that the inode buffer has actually | |
162 | * gone out yet (it's delwri). Plus the buffer could be pinned | |
163 | * anyway if it's part of an inode in another recent | |
164 | * transaction. So we play it safe and fire off the | |
165 | * transaction anyway. | |
166 | */ | |
167 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
168 | xfs_trans_ihold(tp, ip); | |
169 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
170 | xfs_trans_set_sync(tp); | |
171 | error = _xfs_trans_commit(tp, 0, &log_flushed); | |
172 | ||
173 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
174 | } else { | |
175 | /* | |
176 | * Timestamps/size haven't changed since last inode flush or | |
177 | * inode transaction commit. That means either nothing got | |
178 | * written or a transaction committed which caught the updates. | |
179 | * If the latter happened and the transaction hasn't hit the | |
180 | * disk yet, the inode will be still be pinned. If it is, | |
181 | * force the log. | |
182 | */ | |
fd3200be | 183 | if (xfs_ipincount(ip)) { |
024910cb CH |
184 | error = _xfs_log_force_lsn(ip->i_mount, |
185 | ip->i_itemp->ili_last_lsn, | |
186 | XFS_LOG_SYNC, &log_flushed); | |
fd3200be | 187 | } |
024910cb | 188 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
fd3200be CH |
189 | } |
190 | ||
191 | if (ip->i_mount->m_flags & XFS_MOUNT_BARRIER) { | |
192 | /* | |
193 | * If the log write didn't issue an ordered tag we need | |
194 | * to flush the disk cache for the data device now. | |
195 | */ | |
196 | if (!log_flushed) | |
197 | xfs_blkdev_issue_flush(ip->i_mount->m_ddev_targp); | |
198 | ||
199 | /* | |
200 | * If this inode is on the RT dev we need to flush that | |
201 | * cache as well. | |
202 | */ | |
203 | if (XFS_IS_REALTIME_INODE(ip)) | |
204 | xfs_blkdev_issue_flush(ip->i_mount->m_rtdev_targp); | |
205 | } | |
206 | ||
207 | return -error; | |
208 | } | |
209 | ||
00258e36 CH |
210 | STATIC ssize_t |
211 | xfs_file_aio_read( | |
dda35b8f CH |
212 | struct kiocb *iocb, |
213 | const struct iovec *iovp, | |
00258e36 CH |
214 | unsigned long nr_segs, |
215 | loff_t pos) | |
dda35b8f CH |
216 | { |
217 | struct file *file = iocb->ki_filp; | |
218 | struct inode *inode = file->f_mapping->host; | |
00258e36 CH |
219 | struct xfs_inode *ip = XFS_I(inode); |
220 | struct xfs_mount *mp = ip->i_mount; | |
dda35b8f CH |
221 | size_t size = 0; |
222 | ssize_t ret = 0; | |
00258e36 | 223 | int ioflags = 0; |
dda35b8f CH |
224 | xfs_fsize_t n; |
225 | unsigned long seg; | |
226 | ||
dda35b8f CH |
227 | XFS_STATS_INC(xs_read_calls); |
228 | ||
00258e36 CH |
229 | BUG_ON(iocb->ki_pos != pos); |
230 | ||
231 | if (unlikely(file->f_flags & O_DIRECT)) | |
232 | ioflags |= IO_ISDIRECT; | |
233 | if (file->f_mode & FMODE_NOCMTIME) | |
234 | ioflags |= IO_INVIS; | |
235 | ||
dda35b8f | 236 | /* START copy & waste from filemap.c */ |
00258e36 | 237 | for (seg = 0; seg < nr_segs; seg++) { |
dda35b8f CH |
238 | const struct iovec *iv = &iovp[seg]; |
239 | ||
240 | /* | |
241 | * If any segment has a negative length, or the cumulative | |
242 | * length ever wraps negative then return -EINVAL. | |
243 | */ | |
244 | size += iv->iov_len; | |
245 | if (unlikely((ssize_t)(size|iv->iov_len) < 0)) | |
246 | return XFS_ERROR(-EINVAL); | |
247 | } | |
248 | /* END copy & waste from filemap.c */ | |
249 | ||
250 | if (unlikely(ioflags & IO_ISDIRECT)) { | |
251 | xfs_buftarg_t *target = | |
252 | XFS_IS_REALTIME_INODE(ip) ? | |
253 | mp->m_rtdev_targp : mp->m_ddev_targp; | |
00258e36 | 254 | if ((iocb->ki_pos & target->bt_smask) || |
dda35b8f | 255 | (size & target->bt_smask)) { |
00258e36 CH |
256 | if (iocb->ki_pos == ip->i_size) |
257 | return 0; | |
dda35b8f CH |
258 | return -XFS_ERROR(EINVAL); |
259 | } | |
260 | } | |
261 | ||
00258e36 CH |
262 | n = XFS_MAXIOFFSET(mp) - iocb->ki_pos; |
263 | if (n <= 0 || size == 0) | |
dda35b8f CH |
264 | return 0; |
265 | ||
266 | if (n < size) | |
267 | size = n; | |
268 | ||
269 | if (XFS_FORCED_SHUTDOWN(mp)) | |
270 | return -EIO; | |
271 | ||
272 | if (unlikely(ioflags & IO_ISDIRECT)) | |
273 | mutex_lock(&inode->i_mutex); | |
274 | xfs_ilock(ip, XFS_IOLOCK_SHARED); | |
275 | ||
276 | if (DM_EVENT_ENABLED(ip, DM_EVENT_READ) && !(ioflags & IO_INVIS)) { | |
277 | int dmflags = FILP_DELAY_FLAG(file) | DM_SEM_FLAG_RD(ioflags); | |
278 | int iolock = XFS_IOLOCK_SHARED; | |
279 | ||
00258e36 | 280 | ret = -XFS_SEND_DATA(mp, DM_EVENT_READ, ip, iocb->ki_pos, size, |
dda35b8f CH |
281 | dmflags, &iolock); |
282 | if (ret) { | |
283 | xfs_iunlock(ip, XFS_IOLOCK_SHARED); | |
284 | if (unlikely(ioflags & IO_ISDIRECT)) | |
285 | mutex_unlock(&inode->i_mutex); | |
286 | return ret; | |
287 | } | |
288 | } | |
289 | ||
290 | if (unlikely(ioflags & IO_ISDIRECT)) { | |
00258e36 CH |
291 | if (inode->i_mapping->nrpages) { |
292 | ret = -xfs_flushinval_pages(ip, | |
293 | (iocb->ki_pos & PAGE_CACHE_MASK), | |
294 | -1, FI_REMAPF_LOCKED); | |
295 | } | |
dda35b8f CH |
296 | mutex_unlock(&inode->i_mutex); |
297 | if (ret) { | |
298 | xfs_iunlock(ip, XFS_IOLOCK_SHARED); | |
299 | return ret; | |
300 | } | |
301 | } | |
302 | ||
00258e36 | 303 | trace_xfs_file_read(ip, size, iocb->ki_pos, ioflags); |
dda35b8f | 304 | |
00258e36 | 305 | ret = generic_file_aio_read(iocb, iovp, nr_segs, iocb->ki_pos); |
dda35b8f CH |
306 | if (ret > 0) |
307 | XFS_STATS_ADD(xs_read_bytes, ret); | |
308 | ||
309 | xfs_iunlock(ip, XFS_IOLOCK_SHARED); | |
310 | return ret; | |
311 | } | |
312 | ||
00258e36 CH |
313 | STATIC ssize_t |
314 | xfs_file_splice_read( | |
dda35b8f CH |
315 | struct file *infilp, |
316 | loff_t *ppos, | |
317 | struct pipe_inode_info *pipe, | |
318 | size_t count, | |
00258e36 | 319 | unsigned int flags) |
dda35b8f | 320 | { |
00258e36 CH |
321 | struct xfs_inode *ip = XFS_I(infilp->f_mapping->host); |
322 | struct xfs_mount *mp = ip->i_mount; | |
323 | int ioflags = 0; | |
dda35b8f CH |
324 | ssize_t ret; |
325 | ||
326 | XFS_STATS_INC(xs_read_calls); | |
00258e36 CH |
327 | |
328 | if (infilp->f_mode & FMODE_NOCMTIME) | |
329 | ioflags |= IO_INVIS; | |
330 | ||
dda35b8f CH |
331 | if (XFS_FORCED_SHUTDOWN(ip->i_mount)) |
332 | return -EIO; | |
333 | ||
334 | xfs_ilock(ip, XFS_IOLOCK_SHARED); | |
335 | ||
336 | if (DM_EVENT_ENABLED(ip, DM_EVENT_READ) && !(ioflags & IO_INVIS)) { | |
337 | int iolock = XFS_IOLOCK_SHARED; | |
338 | int error; | |
339 | ||
340 | error = XFS_SEND_DATA(mp, DM_EVENT_READ, ip, *ppos, count, | |
341 | FILP_DELAY_FLAG(infilp), &iolock); | |
342 | if (error) { | |
343 | xfs_iunlock(ip, XFS_IOLOCK_SHARED); | |
344 | return -error; | |
345 | } | |
346 | } | |
347 | ||
348 | trace_xfs_file_splice_read(ip, count, *ppos, ioflags); | |
349 | ||
350 | ret = generic_file_splice_read(infilp, ppos, pipe, count, flags); | |
351 | if (ret > 0) | |
352 | XFS_STATS_ADD(xs_read_bytes, ret); | |
353 | ||
354 | xfs_iunlock(ip, XFS_IOLOCK_SHARED); | |
355 | return ret; | |
356 | } | |
357 | ||
00258e36 CH |
358 | STATIC ssize_t |
359 | xfs_file_splice_write( | |
dda35b8f CH |
360 | struct pipe_inode_info *pipe, |
361 | struct file *outfilp, | |
362 | loff_t *ppos, | |
363 | size_t count, | |
00258e36 | 364 | unsigned int flags) |
dda35b8f | 365 | { |
dda35b8f | 366 | struct inode *inode = outfilp->f_mapping->host; |
00258e36 CH |
367 | struct xfs_inode *ip = XFS_I(inode); |
368 | struct xfs_mount *mp = ip->i_mount; | |
dda35b8f | 369 | xfs_fsize_t isize, new_size; |
00258e36 CH |
370 | int ioflags = 0; |
371 | ssize_t ret; | |
dda35b8f CH |
372 | |
373 | XFS_STATS_INC(xs_write_calls); | |
00258e36 CH |
374 | |
375 | if (outfilp->f_mode & FMODE_NOCMTIME) | |
376 | ioflags |= IO_INVIS; | |
377 | ||
dda35b8f CH |
378 | if (XFS_FORCED_SHUTDOWN(ip->i_mount)) |
379 | return -EIO; | |
380 | ||
381 | xfs_ilock(ip, XFS_IOLOCK_EXCL); | |
382 | ||
383 | if (DM_EVENT_ENABLED(ip, DM_EVENT_WRITE) && !(ioflags & IO_INVIS)) { | |
384 | int iolock = XFS_IOLOCK_EXCL; | |
385 | int error; | |
386 | ||
387 | error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, ip, *ppos, count, | |
388 | FILP_DELAY_FLAG(outfilp), &iolock); | |
389 | if (error) { | |
390 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
391 | return -error; | |
392 | } | |
393 | } | |
394 | ||
395 | new_size = *ppos + count; | |
396 | ||
397 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
398 | if (new_size > ip->i_size) | |
399 | ip->i_new_size = new_size; | |
400 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
401 | ||
402 | trace_xfs_file_splice_write(ip, count, *ppos, ioflags); | |
403 | ||
404 | ret = generic_file_splice_write(pipe, outfilp, ppos, count, flags); | |
405 | if (ret > 0) | |
406 | XFS_STATS_ADD(xs_write_bytes, ret); | |
407 | ||
408 | isize = i_size_read(inode); | |
409 | if (unlikely(ret < 0 && ret != -EFAULT && *ppos > isize)) | |
410 | *ppos = isize; | |
411 | ||
412 | if (*ppos > ip->i_size) { | |
413 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
414 | if (*ppos > ip->i_size) | |
415 | ip->i_size = *ppos; | |
416 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
417 | } | |
418 | ||
419 | if (ip->i_new_size) { | |
420 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
421 | ip->i_new_size = 0; | |
422 | if (ip->i_d.di_size > ip->i_size) | |
423 | ip->i_d.di_size = ip->i_size; | |
424 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
425 | } | |
426 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
427 | return ret; | |
428 | } | |
429 | ||
430 | /* | |
431 | * This routine is called to handle zeroing any space in the last | |
432 | * block of the file that is beyond the EOF. We do this since the | |
433 | * size is being increased without writing anything to that block | |
434 | * and we don't want anyone to read the garbage on the disk. | |
435 | */ | |
436 | STATIC int /* error (positive) */ | |
437 | xfs_zero_last_block( | |
438 | xfs_inode_t *ip, | |
439 | xfs_fsize_t offset, | |
440 | xfs_fsize_t isize) | |
441 | { | |
442 | xfs_fileoff_t last_fsb; | |
443 | xfs_mount_t *mp = ip->i_mount; | |
444 | int nimaps; | |
445 | int zero_offset; | |
446 | int zero_len; | |
447 | int error = 0; | |
448 | xfs_bmbt_irec_t imap; | |
449 | ||
450 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); | |
451 | ||
452 | zero_offset = XFS_B_FSB_OFFSET(mp, isize); | |
453 | if (zero_offset == 0) { | |
454 | /* | |
455 | * There are no extra bytes in the last block on disk to | |
456 | * zero, so return. | |
457 | */ | |
458 | return 0; | |
459 | } | |
460 | ||
461 | last_fsb = XFS_B_TO_FSBT(mp, isize); | |
462 | nimaps = 1; | |
463 | error = xfs_bmapi(NULL, ip, last_fsb, 1, 0, NULL, 0, &imap, | |
464 | &nimaps, NULL, NULL); | |
465 | if (error) { | |
466 | return error; | |
467 | } | |
468 | ASSERT(nimaps > 0); | |
469 | /* | |
470 | * If the block underlying isize is just a hole, then there | |
471 | * is nothing to zero. | |
472 | */ | |
473 | if (imap.br_startblock == HOLESTARTBLOCK) { | |
474 | return 0; | |
475 | } | |
476 | /* | |
477 | * Zero the part of the last block beyond the EOF, and write it | |
478 | * out sync. We need to drop the ilock while we do this so we | |
479 | * don't deadlock when the buffer cache calls back to us. | |
480 | */ | |
481 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
482 | ||
483 | zero_len = mp->m_sb.sb_blocksize - zero_offset; | |
484 | if (isize + zero_len > offset) | |
485 | zero_len = offset - isize; | |
486 | error = xfs_iozero(ip, isize, zero_len); | |
487 | ||
488 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
489 | ASSERT(error >= 0); | |
490 | return error; | |
491 | } | |
492 | ||
493 | /* | |
494 | * Zero any on disk space between the current EOF and the new, | |
495 | * larger EOF. This handles the normal case of zeroing the remainder | |
496 | * of the last block in the file and the unusual case of zeroing blocks | |
497 | * out beyond the size of the file. This second case only happens | |
498 | * with fixed size extents and when the system crashes before the inode | |
499 | * size was updated but after blocks were allocated. If fill is set, | |
500 | * then any holes in the range are filled and zeroed. If not, the holes | |
501 | * are left alone as holes. | |
502 | */ | |
503 | ||
504 | int /* error (positive) */ | |
505 | xfs_zero_eof( | |
506 | xfs_inode_t *ip, | |
507 | xfs_off_t offset, /* starting I/O offset */ | |
508 | xfs_fsize_t isize) /* current inode size */ | |
509 | { | |
510 | xfs_mount_t *mp = ip->i_mount; | |
511 | xfs_fileoff_t start_zero_fsb; | |
512 | xfs_fileoff_t end_zero_fsb; | |
513 | xfs_fileoff_t zero_count_fsb; | |
514 | xfs_fileoff_t last_fsb; | |
515 | xfs_fileoff_t zero_off; | |
516 | xfs_fsize_t zero_len; | |
517 | int nimaps; | |
518 | int error = 0; | |
519 | xfs_bmbt_irec_t imap; | |
520 | ||
521 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_IOLOCK_EXCL)); | |
522 | ASSERT(offset > isize); | |
523 | ||
524 | /* | |
525 | * First handle zeroing the block on which isize resides. | |
526 | * We only zero a part of that block so it is handled specially. | |
527 | */ | |
528 | error = xfs_zero_last_block(ip, offset, isize); | |
529 | if (error) { | |
530 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_IOLOCK_EXCL)); | |
531 | return error; | |
532 | } | |
533 | ||
534 | /* | |
535 | * Calculate the range between the new size and the old | |
536 | * where blocks needing to be zeroed may exist. To get the | |
537 | * block where the last byte in the file currently resides, | |
538 | * we need to subtract one from the size and truncate back | |
539 | * to a block boundary. We subtract 1 in case the size is | |
540 | * exactly on a block boundary. | |
541 | */ | |
542 | last_fsb = isize ? XFS_B_TO_FSBT(mp, isize - 1) : (xfs_fileoff_t)-1; | |
543 | start_zero_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)isize); | |
544 | end_zero_fsb = XFS_B_TO_FSBT(mp, offset - 1); | |
545 | ASSERT((xfs_sfiloff_t)last_fsb < (xfs_sfiloff_t)start_zero_fsb); | |
546 | if (last_fsb == end_zero_fsb) { | |
547 | /* | |
548 | * The size was only incremented on its last block. | |
549 | * We took care of that above, so just return. | |
550 | */ | |
551 | return 0; | |
552 | } | |
553 | ||
554 | ASSERT(start_zero_fsb <= end_zero_fsb); | |
555 | while (start_zero_fsb <= end_zero_fsb) { | |
556 | nimaps = 1; | |
557 | zero_count_fsb = end_zero_fsb - start_zero_fsb + 1; | |
558 | error = xfs_bmapi(NULL, ip, start_zero_fsb, zero_count_fsb, | |
559 | 0, NULL, 0, &imap, &nimaps, NULL, NULL); | |
560 | if (error) { | |
561 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_IOLOCK_EXCL)); | |
562 | return error; | |
563 | } | |
564 | ASSERT(nimaps > 0); | |
565 | ||
566 | if (imap.br_state == XFS_EXT_UNWRITTEN || | |
567 | imap.br_startblock == HOLESTARTBLOCK) { | |
568 | /* | |
569 | * This loop handles initializing pages that were | |
570 | * partially initialized by the code below this | |
571 | * loop. It basically zeroes the part of the page | |
572 | * that sits on a hole and sets the page as P_HOLE | |
573 | * and calls remapf if it is a mapped file. | |
574 | */ | |
575 | start_zero_fsb = imap.br_startoff + imap.br_blockcount; | |
576 | ASSERT(start_zero_fsb <= (end_zero_fsb + 1)); | |
577 | continue; | |
578 | } | |
579 | ||
580 | /* | |
581 | * There are blocks we need to zero. | |
582 | * Drop the inode lock while we're doing the I/O. | |
583 | * We'll still have the iolock to protect us. | |
584 | */ | |
585 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
586 | ||
587 | zero_off = XFS_FSB_TO_B(mp, start_zero_fsb); | |
588 | zero_len = XFS_FSB_TO_B(mp, imap.br_blockcount); | |
589 | ||
590 | if ((zero_off + zero_len) > offset) | |
591 | zero_len = offset - zero_off; | |
592 | ||
593 | error = xfs_iozero(ip, zero_off, zero_len); | |
594 | if (error) { | |
595 | goto out_lock; | |
596 | } | |
597 | ||
598 | start_zero_fsb = imap.br_startoff + imap.br_blockcount; | |
599 | ASSERT(start_zero_fsb <= (end_zero_fsb + 1)); | |
600 | ||
601 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
602 | } | |
603 | ||
604 | return 0; | |
605 | ||
606 | out_lock: | |
607 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
608 | ASSERT(error >= 0); | |
609 | return error; | |
610 | } | |
611 | ||
00258e36 CH |
612 | STATIC ssize_t |
613 | xfs_file_aio_write( | |
dda35b8f CH |
614 | struct kiocb *iocb, |
615 | const struct iovec *iovp, | |
00258e36 CH |
616 | unsigned long nr_segs, |
617 | loff_t pos) | |
dda35b8f CH |
618 | { |
619 | struct file *file = iocb->ki_filp; | |
620 | struct address_space *mapping = file->f_mapping; | |
621 | struct inode *inode = mapping->host; | |
00258e36 CH |
622 | struct xfs_inode *ip = XFS_I(inode); |
623 | struct xfs_mount *mp = ip->i_mount; | |
dda35b8f | 624 | ssize_t ret = 0, error = 0; |
00258e36 | 625 | int ioflags = 0; |
dda35b8f CH |
626 | xfs_fsize_t isize, new_size; |
627 | int iolock; | |
628 | int eventsent = 0; | |
629 | size_t ocount = 0, count; | |
dda35b8f CH |
630 | int need_i_mutex; |
631 | ||
632 | XFS_STATS_INC(xs_write_calls); | |
633 | ||
00258e36 CH |
634 | BUG_ON(iocb->ki_pos != pos); |
635 | ||
636 | if (unlikely(file->f_flags & O_DIRECT)) | |
637 | ioflags |= IO_ISDIRECT; | |
638 | if (file->f_mode & FMODE_NOCMTIME) | |
639 | ioflags |= IO_INVIS; | |
640 | ||
641 | error = generic_segment_checks(iovp, &nr_segs, &ocount, VERIFY_READ); | |
dda35b8f CH |
642 | if (error) |
643 | return error; | |
644 | ||
645 | count = ocount; | |
dda35b8f CH |
646 | if (count == 0) |
647 | return 0; | |
648 | ||
dda35b8f CH |
649 | xfs_wait_for_freeze(mp, SB_FREEZE_WRITE); |
650 | ||
651 | if (XFS_FORCED_SHUTDOWN(mp)) | |
652 | return -EIO; | |
653 | ||
654 | relock: | |
655 | if (ioflags & IO_ISDIRECT) { | |
656 | iolock = XFS_IOLOCK_SHARED; | |
657 | need_i_mutex = 0; | |
658 | } else { | |
659 | iolock = XFS_IOLOCK_EXCL; | |
660 | need_i_mutex = 1; | |
661 | mutex_lock(&inode->i_mutex); | |
662 | } | |
663 | ||
00258e36 | 664 | xfs_ilock(ip, XFS_ILOCK_EXCL|iolock); |
dda35b8f CH |
665 | |
666 | start: | |
667 | error = -generic_write_checks(file, &pos, &count, | |
668 | S_ISBLK(inode->i_mode)); | |
669 | if (error) { | |
00258e36 | 670 | xfs_iunlock(ip, XFS_ILOCK_EXCL|iolock); |
dda35b8f CH |
671 | goto out_unlock_mutex; |
672 | } | |
673 | ||
00258e36 | 674 | if ((DM_EVENT_ENABLED(ip, DM_EVENT_WRITE) && |
dda35b8f CH |
675 | !(ioflags & IO_INVIS) && !eventsent)) { |
676 | int dmflags = FILP_DELAY_FLAG(file); | |
677 | ||
678 | if (need_i_mutex) | |
679 | dmflags |= DM_FLAGS_IMUX; | |
680 | ||
00258e36 CH |
681 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
682 | error = XFS_SEND_DATA(ip->i_mount, DM_EVENT_WRITE, ip, | |
dda35b8f CH |
683 | pos, count, dmflags, &iolock); |
684 | if (error) { | |
685 | goto out_unlock_internal; | |
686 | } | |
00258e36 | 687 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
dda35b8f CH |
688 | eventsent = 1; |
689 | ||
690 | /* | |
691 | * The iolock was dropped and reacquired in XFS_SEND_DATA | |
692 | * so we have to recheck the size when appending. | |
693 | * We will only "goto start;" once, since having sent the | |
694 | * event prevents another call to XFS_SEND_DATA, which is | |
695 | * what allows the size to change in the first place. | |
696 | */ | |
00258e36 | 697 | if ((file->f_flags & O_APPEND) && pos != ip->i_size) |
dda35b8f CH |
698 | goto start; |
699 | } | |
700 | ||
701 | if (ioflags & IO_ISDIRECT) { | |
702 | xfs_buftarg_t *target = | |
00258e36 | 703 | XFS_IS_REALTIME_INODE(ip) ? |
dda35b8f CH |
704 | mp->m_rtdev_targp : mp->m_ddev_targp; |
705 | ||
706 | if ((pos & target->bt_smask) || (count & target->bt_smask)) { | |
00258e36 | 707 | xfs_iunlock(ip, XFS_ILOCK_EXCL|iolock); |
dda35b8f CH |
708 | return XFS_ERROR(-EINVAL); |
709 | } | |
710 | ||
00258e36 CH |
711 | if (!need_i_mutex && (mapping->nrpages || pos > ip->i_size)) { |
712 | xfs_iunlock(ip, XFS_ILOCK_EXCL|iolock); | |
dda35b8f CH |
713 | iolock = XFS_IOLOCK_EXCL; |
714 | need_i_mutex = 1; | |
715 | mutex_lock(&inode->i_mutex); | |
00258e36 | 716 | xfs_ilock(ip, XFS_ILOCK_EXCL|iolock); |
dda35b8f CH |
717 | goto start; |
718 | } | |
719 | } | |
720 | ||
721 | new_size = pos + count; | |
00258e36 CH |
722 | if (new_size > ip->i_size) |
723 | ip->i_new_size = new_size; | |
dda35b8f CH |
724 | |
725 | if (likely(!(ioflags & IO_INVIS))) | |
726 | file_update_time(file); | |
727 | ||
728 | /* | |
729 | * If the offset is beyond the size of the file, we have a couple | |
730 | * of things to do. First, if there is already space allocated | |
731 | * we need to either create holes or zero the disk or ... | |
732 | * | |
733 | * If there is a page where the previous size lands, we need | |
734 | * to zero it out up to the new size. | |
735 | */ | |
736 | ||
00258e36 CH |
737 | if (pos > ip->i_size) { |
738 | error = xfs_zero_eof(ip, pos, ip->i_size); | |
dda35b8f | 739 | if (error) { |
00258e36 | 740 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
dda35b8f CH |
741 | goto out_unlock_internal; |
742 | } | |
743 | } | |
00258e36 | 744 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
dda35b8f CH |
745 | |
746 | /* | |
747 | * If we're writing the file then make sure to clear the | |
748 | * setuid and setgid bits if the process is not being run | |
749 | * by root. This keeps people from modifying setuid and | |
750 | * setgid binaries. | |
751 | */ | |
752 | error = -file_remove_suid(file); | |
753 | if (unlikely(error)) | |
754 | goto out_unlock_internal; | |
755 | ||
756 | /* We can write back this queue in page reclaim */ | |
757 | current->backing_dev_info = mapping->backing_dev_info; | |
758 | ||
759 | if ((ioflags & IO_ISDIRECT)) { | |
760 | if (mapping->nrpages) { | |
761 | WARN_ON(need_i_mutex == 0); | |
00258e36 | 762 | error = xfs_flushinval_pages(ip, |
dda35b8f CH |
763 | (pos & PAGE_CACHE_MASK), |
764 | -1, FI_REMAPF_LOCKED); | |
765 | if (error) | |
766 | goto out_unlock_internal; | |
767 | } | |
768 | ||
769 | if (need_i_mutex) { | |
770 | /* demote the lock now the cached pages are gone */ | |
00258e36 | 771 | xfs_ilock_demote(ip, XFS_IOLOCK_EXCL); |
dda35b8f CH |
772 | mutex_unlock(&inode->i_mutex); |
773 | ||
774 | iolock = XFS_IOLOCK_SHARED; | |
775 | need_i_mutex = 0; | |
776 | } | |
777 | ||
00258e36 | 778 | trace_xfs_file_direct_write(ip, count, iocb->ki_pos, ioflags); |
dda35b8f | 779 | ret = generic_file_direct_write(iocb, iovp, |
00258e36 | 780 | &nr_segs, pos, &iocb->ki_pos, count, ocount); |
dda35b8f CH |
781 | |
782 | /* | |
783 | * direct-io write to a hole: fall through to buffered I/O | |
784 | * for completing the rest of the request. | |
785 | */ | |
786 | if (ret >= 0 && ret != count) { | |
787 | XFS_STATS_ADD(xs_write_bytes, ret); | |
788 | ||
789 | pos += ret; | |
790 | count -= ret; | |
791 | ||
792 | ioflags &= ~IO_ISDIRECT; | |
00258e36 | 793 | xfs_iunlock(ip, iolock); |
dda35b8f CH |
794 | goto relock; |
795 | } | |
796 | } else { | |
797 | int enospc = 0; | |
798 | ssize_t ret2 = 0; | |
799 | ||
800 | write_retry: | |
00258e36 CH |
801 | trace_xfs_file_buffered_write(ip, count, iocb->ki_pos, ioflags); |
802 | ret2 = generic_file_buffered_write(iocb, iovp, nr_segs, | |
803 | pos, &iocb->ki_pos, count, ret); | |
dda35b8f CH |
804 | /* |
805 | * if we just got an ENOSPC, flush the inode now we | |
806 | * aren't holding any page locks and retry *once* | |
807 | */ | |
808 | if (ret2 == -ENOSPC && !enospc) { | |
00258e36 | 809 | error = xfs_flush_pages(ip, 0, -1, 0, FI_NONE); |
dda35b8f CH |
810 | if (error) |
811 | goto out_unlock_internal; | |
812 | enospc = 1; | |
813 | goto write_retry; | |
814 | } | |
815 | ret = ret2; | |
816 | } | |
817 | ||
818 | current->backing_dev_info = NULL; | |
819 | ||
820 | isize = i_size_read(inode); | |
00258e36 CH |
821 | if (unlikely(ret < 0 && ret != -EFAULT && iocb->ki_pos > isize)) |
822 | iocb->ki_pos = isize; | |
823 | ||
824 | if (iocb->ki_pos > ip->i_size) { | |
825 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
826 | if (iocb->ki_pos > ip->i_size) | |
827 | ip->i_size = iocb->ki_pos; | |
828 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
dda35b8f CH |
829 | } |
830 | ||
831 | if (ret == -ENOSPC && | |
00258e36 CH |
832 | DM_EVENT_ENABLED(ip, DM_EVENT_NOSPACE) && !(ioflags & IO_INVIS)) { |
833 | xfs_iunlock(ip, iolock); | |
dda35b8f CH |
834 | if (need_i_mutex) |
835 | mutex_unlock(&inode->i_mutex); | |
00258e36 CH |
836 | error = XFS_SEND_NAMESP(ip->i_mount, DM_EVENT_NOSPACE, ip, |
837 | DM_RIGHT_NULL, ip, DM_RIGHT_NULL, NULL, NULL, | |
dda35b8f CH |
838 | 0, 0, 0); /* Delay flag intentionally unused */ |
839 | if (need_i_mutex) | |
840 | mutex_lock(&inode->i_mutex); | |
00258e36 | 841 | xfs_ilock(ip, iolock); |
dda35b8f CH |
842 | if (error) |
843 | goto out_unlock_internal; | |
844 | goto start; | |
845 | } | |
846 | ||
847 | error = -ret; | |
848 | if (ret <= 0) | |
849 | goto out_unlock_internal; | |
850 | ||
851 | XFS_STATS_ADD(xs_write_bytes, ret); | |
852 | ||
853 | /* Handle various SYNC-type writes */ | |
854 | if ((file->f_flags & O_DSYNC) || IS_SYNC(inode)) { | |
855 | loff_t end = pos + ret - 1; | |
856 | int error2; | |
857 | ||
00258e36 | 858 | xfs_iunlock(ip, iolock); |
dda35b8f CH |
859 | if (need_i_mutex) |
860 | mutex_unlock(&inode->i_mutex); | |
861 | ||
862 | error2 = filemap_write_and_wait_range(mapping, pos, end); | |
863 | if (!error) | |
864 | error = error2; | |
865 | if (need_i_mutex) | |
866 | mutex_lock(&inode->i_mutex); | |
00258e36 | 867 | xfs_ilock(ip, iolock); |
dda35b8f | 868 | |
fd3200be CH |
869 | error2 = -xfs_file_fsync(file, file->f_path.dentry, |
870 | (file->f_flags & __O_SYNC) ? 0 : 1); | |
dda35b8f CH |
871 | if (!error) |
872 | error = error2; | |
873 | } | |
874 | ||
875 | out_unlock_internal: | |
00258e36 CH |
876 | if (ip->i_new_size) { |
877 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
878 | ip->i_new_size = 0; | |
dda35b8f CH |
879 | /* |
880 | * If this was a direct or synchronous I/O that failed (such | |
881 | * as ENOSPC) then part of the I/O may have been written to | |
882 | * disk before the error occured. In this case the on-disk | |
883 | * file size may have been adjusted beyond the in-memory file | |
884 | * size and now needs to be truncated back. | |
885 | */ | |
00258e36 CH |
886 | if (ip->i_d.di_size > ip->i_size) |
887 | ip->i_d.di_size = ip->i_size; | |
888 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
dda35b8f | 889 | } |
00258e36 | 890 | xfs_iunlock(ip, iolock); |
dda35b8f CH |
891 | out_unlock_mutex: |
892 | if (need_i_mutex) | |
893 | mutex_unlock(&inode->i_mutex); | |
894 | return -error; | |
895 | } | |
896 | ||
1da177e4 | 897 | STATIC int |
3562fd45 | 898 | xfs_file_open( |
1da177e4 | 899 | struct inode *inode, |
f999a5bf | 900 | struct file *file) |
1da177e4 | 901 | { |
f999a5bf | 902 | if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS) |
1da177e4 | 903 | return -EFBIG; |
f999a5bf CH |
904 | if (XFS_FORCED_SHUTDOWN(XFS_M(inode->i_sb))) |
905 | return -EIO; | |
906 | return 0; | |
907 | } | |
908 | ||
909 | STATIC int | |
910 | xfs_dir_open( | |
911 | struct inode *inode, | |
912 | struct file *file) | |
913 | { | |
914 | struct xfs_inode *ip = XFS_I(inode); | |
915 | int mode; | |
916 | int error; | |
917 | ||
918 | error = xfs_file_open(inode, file); | |
919 | if (error) | |
920 | return error; | |
921 | ||
922 | /* | |
923 | * If there are any blocks, read-ahead block 0 as we're almost | |
924 | * certain to have the next operation be a read there. | |
925 | */ | |
926 | mode = xfs_ilock_map_shared(ip); | |
927 | if (ip->i_d.di_nextents > 0) | |
928 | xfs_da_reada_buf(NULL, ip, 0, XFS_DATA_FORK); | |
929 | xfs_iunlock(ip, mode); | |
930 | return 0; | |
1da177e4 LT |
931 | } |
932 | ||
1da177e4 | 933 | STATIC int |
3562fd45 | 934 | xfs_file_release( |
1da177e4 LT |
935 | struct inode *inode, |
936 | struct file *filp) | |
937 | { | |
739bfb2a | 938 | return -xfs_release(XFS_I(inode)); |
1da177e4 LT |
939 | } |
940 | ||
1da177e4 | 941 | STATIC int |
3562fd45 | 942 | xfs_file_readdir( |
1da177e4 LT |
943 | struct file *filp, |
944 | void *dirent, | |
945 | filldir_t filldir) | |
946 | { | |
051e7cd4 | 947 | struct inode *inode = filp->f_path.dentry->d_inode; |
739bfb2a | 948 | xfs_inode_t *ip = XFS_I(inode); |
051e7cd4 CH |
949 | int error; |
950 | size_t bufsize; | |
951 | ||
952 | /* | |
953 | * The Linux API doesn't pass down the total size of the buffer | |
954 | * we read into down to the filesystem. With the filldir concept | |
955 | * it's not needed for correct information, but the XFS dir2 leaf | |
956 | * code wants an estimate of the buffer size to calculate it's | |
957 | * readahead window and size the buffers used for mapping to | |
958 | * physical blocks. | |
959 | * | |
960 | * Try to give it an estimate that's good enough, maybe at some | |
961 | * point we can change the ->readdir prototype to include the | |
a9cc799e | 962 | * buffer size. For now we use the current glibc buffer size. |
051e7cd4 | 963 | */ |
a9cc799e | 964 | bufsize = (size_t)min_t(loff_t, 32768, ip->i_d.di_size); |
051e7cd4 | 965 | |
739bfb2a | 966 | error = xfs_readdir(ip, dirent, bufsize, |
051e7cd4 CH |
967 | (xfs_off_t *)&filp->f_pos, filldir); |
968 | if (error) | |
969 | return -error; | |
970 | return 0; | |
1da177e4 LT |
971 | } |
972 | ||
1da177e4 | 973 | STATIC int |
3562fd45 | 974 | xfs_file_mmap( |
1da177e4 LT |
975 | struct file *filp, |
976 | struct vm_area_struct *vma) | |
977 | { | |
3562fd45 | 978 | vma->vm_ops = &xfs_file_vm_ops; |
d0217ac0 | 979 | vma->vm_flags |= VM_CAN_NONLINEAR; |
6fac0cb4 | 980 | |
fbc1462b | 981 | file_accessed(filp); |
1da177e4 LT |
982 | return 0; |
983 | } | |
984 | ||
4f57dbc6 DC |
985 | /* |
986 | * mmap()d file has taken write protection fault and is being made | |
987 | * writable. We can set the page state up correctly for a writable | |
988 | * page, which means we can do correct delalloc accounting (ENOSPC | |
989 | * checking!) and unwritten extent mapping. | |
990 | */ | |
991 | STATIC int | |
992 | xfs_vm_page_mkwrite( | |
993 | struct vm_area_struct *vma, | |
c2ec175c | 994 | struct vm_fault *vmf) |
4f57dbc6 | 995 | { |
c2ec175c | 996 | return block_page_mkwrite(vma, vmf, xfs_get_blocks); |
4f57dbc6 DC |
997 | } |
998 | ||
4b6f5d20 | 999 | const struct file_operations xfs_file_operations = { |
1da177e4 LT |
1000 | .llseek = generic_file_llseek, |
1001 | .read = do_sync_read, | |
bb3f724e | 1002 | .write = do_sync_write, |
3562fd45 NS |
1003 | .aio_read = xfs_file_aio_read, |
1004 | .aio_write = xfs_file_aio_write, | |
1b895840 NS |
1005 | .splice_read = xfs_file_splice_read, |
1006 | .splice_write = xfs_file_splice_write, | |
3562fd45 | 1007 | .unlocked_ioctl = xfs_file_ioctl, |
1da177e4 | 1008 | #ifdef CONFIG_COMPAT |
3562fd45 | 1009 | .compat_ioctl = xfs_file_compat_ioctl, |
1da177e4 | 1010 | #endif |
3562fd45 NS |
1011 | .mmap = xfs_file_mmap, |
1012 | .open = xfs_file_open, | |
1013 | .release = xfs_file_release, | |
1014 | .fsync = xfs_file_fsync, | |
1da177e4 | 1015 | #ifdef HAVE_FOP_OPEN_EXEC |
3562fd45 | 1016 | .open_exec = xfs_file_open_exec, |
1da177e4 LT |
1017 | #endif |
1018 | }; | |
1019 | ||
4b6f5d20 | 1020 | const struct file_operations xfs_dir_file_operations = { |
f999a5bf | 1021 | .open = xfs_dir_open, |
1da177e4 | 1022 | .read = generic_read_dir, |
3562fd45 | 1023 | .readdir = xfs_file_readdir, |
59af1584 | 1024 | .llseek = generic_file_llseek, |
3562fd45 | 1025 | .unlocked_ioctl = xfs_file_ioctl, |
d3870398 | 1026 | #ifdef CONFIG_COMPAT |
3562fd45 | 1027 | .compat_ioctl = xfs_file_compat_ioctl, |
d3870398 | 1028 | #endif |
3562fd45 | 1029 | .fsync = xfs_file_fsync, |
1da177e4 LT |
1030 | }; |
1031 | ||
f0f37e2f | 1032 | static const struct vm_operations_struct xfs_file_vm_ops = { |
54cb8821 | 1033 | .fault = filemap_fault, |
4f57dbc6 | 1034 | .page_mkwrite = xfs_vm_page_mkwrite, |
6fac0cb4 | 1035 | }; |