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0b61f8a4 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
7b718769 NS |
3 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
4 | * All Rights Reserved. | |
1da177e4 | 5 | */ |
1da177e4 | 6 | #include "xfs.h" |
dda35b8f | 7 | #include "xfs_fs.h" |
70a9883c | 8 | #include "xfs_shared.h" |
a4fbe6ab | 9 | #include "xfs_format.h" |
239880ef DC |
10 | #include "xfs_log_format.h" |
11 | #include "xfs_trans_resv.h" | |
1da177e4 | 12 | #include "xfs_mount.h" |
1da177e4 | 13 | #include "xfs_inode.h" |
239880ef | 14 | #include "xfs_trans.h" |
fd3200be | 15 | #include "xfs_inode_item.h" |
dda35b8f | 16 | #include "xfs_bmap.h" |
c24b5dfa | 17 | #include "xfs_bmap_util.h" |
2b9ab5ab | 18 | #include "xfs_dir2.h" |
c24b5dfa | 19 | #include "xfs_dir2_priv.h" |
ddcd856d | 20 | #include "xfs_ioctl.h" |
dda35b8f | 21 | #include "xfs_trace.h" |
239880ef | 22 | #include "xfs_log.h" |
dc06f398 | 23 | #include "xfs_icache.h" |
781355c6 | 24 | #include "xfs_pnfs.h" |
68a9f5e7 | 25 | #include "xfs_iomap.h" |
0613f16c | 26 | #include "xfs_reflink.h" |
1da177e4 | 27 | |
ea6c49b7 | 28 | #include <linux/dax.h> |
2fe17c10 | 29 | #include <linux/falloc.h> |
66114cad | 30 | #include <linux/backing-dev.h> |
a39e596b | 31 | #include <linux/mman.h> |
40144e49 | 32 | #include <linux/fadvise.h> |
f736d93d | 33 | #include <linux/mount.h> |
1da177e4 | 34 | |
f0f37e2f | 35 | static const struct vm_operations_struct xfs_file_vm_ops; |
1da177e4 | 36 | |
25219dbf DW |
37 | /* |
38 | * Decide if the given file range is aligned to the size of the fundamental | |
39 | * allocation unit for the file. | |
40 | */ | |
41 | static bool | |
42 | xfs_is_falloc_aligned( | |
43 | struct xfs_inode *ip, | |
44 | loff_t pos, | |
45 | long long int len) | |
46 | { | |
47 | struct xfs_mount *mp = ip->i_mount; | |
48 | uint64_t mask; | |
49 | ||
50 | if (XFS_IS_REALTIME_INODE(ip)) { | |
51 | if (!is_power_of_2(mp->m_sb.sb_rextsize)) { | |
52 | u64 rextbytes; | |
53 | u32 mod; | |
54 | ||
55 | rextbytes = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize); | |
56 | div_u64_rem(pos, rextbytes, &mod); | |
57 | if (mod) | |
58 | return false; | |
59 | div_u64_rem(len, rextbytes, &mod); | |
60 | return mod == 0; | |
61 | } | |
62 | mask = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize) - 1; | |
63 | } else { | |
64 | mask = mp->m_sb.sb_blocksize - 1; | |
65 | } | |
66 | ||
67 | return !((pos | len) & mask); | |
68 | } | |
69 | ||
1da2f2db CH |
70 | /* |
71 | * Fsync operations on directories are much simpler than on regular files, | |
72 | * as there is no file data to flush, and thus also no need for explicit | |
73 | * cache flush operations, and there are no non-transaction metadata updates | |
74 | * on directories either. | |
75 | */ | |
76 | STATIC int | |
77 | xfs_dir_fsync( | |
78 | struct file *file, | |
79 | loff_t start, | |
80 | loff_t end, | |
81 | int datasync) | |
82 | { | |
83 | struct xfs_inode *ip = XFS_I(file->f_mapping->host); | |
1da2f2db CH |
84 | |
85 | trace_xfs_dir_fsync(ip); | |
54fbdd10 | 86 | return xfs_log_force_inode(ip); |
1da2f2db CH |
87 | } |
88 | ||
5f9b4b0d DC |
89 | static xfs_csn_t |
90 | xfs_fsync_seq( | |
f22c7f87 CH |
91 | struct xfs_inode *ip, |
92 | bool datasync) | |
93 | { | |
94 | if (!xfs_ipincount(ip)) | |
95 | return 0; | |
96 | if (datasync && !(ip->i_itemp->ili_fsync_fields & ~XFS_ILOG_TIMESTAMP)) | |
97 | return 0; | |
5f9b4b0d | 98 | return ip->i_itemp->ili_commit_seq; |
f22c7f87 CH |
99 | } |
100 | ||
101 | /* | |
102 | * All metadata updates are logged, which means that we just have to flush the | |
103 | * log up to the latest LSN that touched the inode. | |
104 | * | |
105 | * If we have concurrent fsync/fdatasync() calls, we need them to all block on | |
106 | * the log force before we clear the ili_fsync_fields field. This ensures that | |
107 | * we don't get a racing sync operation that does not wait for the metadata to | |
108 | * hit the journal before returning. If we race with clearing ili_fsync_fields, | |
109 | * then all that will happen is the log force will do nothing as the lsn will | |
110 | * already be on disk. We can't race with setting ili_fsync_fields because that | |
111 | * is done under XFS_ILOCK_EXCL, and that can't happen because we hold the lock | |
112 | * shared until after the ili_fsync_fields is cleared. | |
113 | */ | |
114 | static int | |
115 | xfs_fsync_flush_log( | |
116 | struct xfs_inode *ip, | |
117 | bool datasync, | |
118 | int *log_flushed) | |
119 | { | |
120 | int error = 0; | |
5f9b4b0d | 121 | xfs_csn_t seq; |
f22c7f87 CH |
122 | |
123 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
5f9b4b0d DC |
124 | seq = xfs_fsync_seq(ip, datasync); |
125 | if (seq) { | |
126 | error = xfs_log_force_seq(ip->i_mount, seq, XFS_LOG_SYNC, | |
f22c7f87 CH |
127 | log_flushed); |
128 | ||
129 | spin_lock(&ip->i_itemp->ili_lock); | |
130 | ip->i_itemp->ili_fsync_fields = 0; | |
131 | spin_unlock(&ip->i_itemp->ili_lock); | |
132 | } | |
133 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
134 | return error; | |
135 | } | |
136 | ||
fd3200be CH |
137 | STATIC int |
138 | xfs_file_fsync( | |
139 | struct file *file, | |
02c24a82 JB |
140 | loff_t start, |
141 | loff_t end, | |
fd3200be CH |
142 | int datasync) |
143 | { | |
f22c7f87 | 144 | struct xfs_inode *ip = XFS_I(file->f_mapping->host); |
a27a263b | 145 | struct xfs_mount *mp = ip->i_mount; |
7d839e32 | 146 | int error, err2; |
fd3200be CH |
147 | int log_flushed = 0; |
148 | ||
cca28fb8 | 149 | trace_xfs_file_fsync(ip); |
fd3200be | 150 | |
1b180274 | 151 | error = file_write_and_wait_range(file, start, end); |
02c24a82 JB |
152 | if (error) |
153 | return error; | |
154 | ||
75c8c50f | 155 | if (xfs_is_shutdown(mp)) |
b474c7ae | 156 | return -EIO; |
fd3200be CH |
157 | |
158 | xfs_iflags_clear(ip, XFS_ITRUNCATED); | |
159 | ||
2291dab2 DC |
160 | /* |
161 | * If we have an RT and/or log subvolume we need to make sure to flush | |
162 | * the write cache the device used for file data first. This is to | |
163 | * ensure newly written file data make it to disk before logging the new | |
164 | * inode size in case of an extending write. | |
165 | */ | |
166 | if (XFS_IS_REALTIME_INODE(ip)) | |
7d839e32 | 167 | error = blkdev_issue_flush(mp->m_rtdev_targp->bt_bdev); |
2291dab2 | 168 | else if (mp->m_logdev_targp != mp->m_ddev_targp) |
7d839e32 | 169 | error = blkdev_issue_flush(mp->m_ddev_targp->bt_bdev); |
a27a263b | 170 | |
fd3200be | 171 | /* |
ae29e422 | 172 | * Any inode that has dirty modifications in the log is pinned. The |
7d839e32 | 173 | * racy check here for a pinned inode will not catch modifications |
ae29e422 CH |
174 | * that happen concurrently to the fsync call, but fsync semantics |
175 | * only require to sync previously completed I/O. | |
fd3200be | 176 | */ |
7d839e32 DW |
177 | if (xfs_ipincount(ip)) { |
178 | err2 = xfs_fsync_flush_log(ip, datasync, &log_flushed); | |
179 | if (err2 && !error) | |
180 | error = err2; | |
181 | } | |
b1037058 | 182 | |
a27a263b CH |
183 | /* |
184 | * If we only have a single device, and the log force about was | |
185 | * a no-op we might have to flush the data device cache here. | |
186 | * This can only happen for fdatasync/O_DSYNC if we were overwriting | |
187 | * an already allocated file and thus do not have any metadata to | |
188 | * commit. | |
189 | */ | |
2291dab2 | 190 | if (!log_flushed && !XFS_IS_REALTIME_INODE(ip) && |
7d839e32 DW |
191 | mp->m_logdev_targp == mp->m_ddev_targp) { |
192 | err2 = blkdev_issue_flush(mp->m_ddev_targp->bt_bdev); | |
193 | if (err2 && !error) | |
194 | error = err2; | |
195 | } | |
fd3200be | 196 | |
2451337d | 197 | return error; |
fd3200be CH |
198 | } |
199 | ||
f50b8f47 CH |
200 | static int |
201 | xfs_ilock_iocb( | |
202 | struct kiocb *iocb, | |
203 | unsigned int lock_mode) | |
204 | { | |
205 | struct xfs_inode *ip = XFS_I(file_inode(iocb->ki_filp)); | |
206 | ||
207 | if (iocb->ki_flags & IOCB_NOWAIT) { | |
208 | if (!xfs_ilock_nowait(ip, lock_mode)) | |
209 | return -EAGAIN; | |
210 | } else { | |
211 | xfs_ilock(ip, lock_mode); | |
212 | } | |
213 | ||
214 | return 0; | |
215 | } | |
216 | ||
14a53798 CH |
217 | static int |
218 | xfs_ilock_iocb_for_write( | |
219 | struct kiocb *iocb, | |
220 | unsigned int *lock_mode) | |
221 | { | |
222 | ssize_t ret; | |
223 | struct xfs_inode *ip = XFS_I(file_inode(iocb->ki_filp)); | |
224 | ||
225 | ret = xfs_ilock_iocb(iocb, *lock_mode); | |
226 | if (ret) | |
227 | return ret; | |
228 | ||
229 | if (*lock_mode == XFS_IOLOCK_EXCL) | |
230 | return 0; | |
231 | if (!xfs_iflags_test(ip, XFS_IREMAPPING)) | |
232 | return 0; | |
233 | ||
234 | xfs_iunlock(ip, *lock_mode); | |
235 | *lock_mode = XFS_IOLOCK_EXCL; | |
236 | return xfs_ilock_iocb(iocb, *lock_mode); | |
237 | } | |
238 | ||
239 | static unsigned int | |
240 | xfs_ilock_for_write_fault( | |
241 | struct xfs_inode *ip) | |
242 | { | |
243 | /* get a shared lock if no remapping in progress */ | |
244 | xfs_ilock(ip, XFS_MMAPLOCK_SHARED); | |
245 | if (!xfs_iflags_test(ip, XFS_IREMAPPING)) | |
246 | return XFS_MMAPLOCK_SHARED; | |
247 | ||
248 | /* wait for remapping to complete */ | |
249 | xfs_iunlock(ip, XFS_MMAPLOCK_SHARED); | |
250 | xfs_ilock(ip, XFS_MMAPLOCK_EXCL); | |
251 | return XFS_MMAPLOCK_EXCL; | |
252 | } | |
253 | ||
00258e36 | 254 | STATIC ssize_t |
ee1b218b | 255 | xfs_file_dio_read( |
dda35b8f | 256 | struct kiocb *iocb, |
b4f5d2c6 | 257 | struct iov_iter *to) |
dda35b8f | 258 | { |
acdda3aa | 259 | struct xfs_inode *ip = XFS_I(file_inode(iocb->ki_filp)); |
acdda3aa | 260 | ssize_t ret; |
dda35b8f | 261 | |
3e40b13c | 262 | trace_xfs_file_direct_read(iocb, to); |
dda35b8f | 263 | |
3e40b13c | 264 | if (!iov_iter_count(to)) |
f1285ff0 | 265 | return 0; /* skip atime */ |
dda35b8f | 266 | |
a447d7cd CH |
267 | file_accessed(iocb->ki_filp); |
268 | ||
f50b8f47 CH |
269 | ret = xfs_ilock_iocb(iocb, XFS_IOLOCK_SHARED); |
270 | if (ret) | |
271 | return ret; | |
786f847f | 272 | ret = iomap_dio_rw(iocb, to, &xfs_read_iomap_ops, NULL, 0, NULL, 0); |
65523218 | 273 | xfs_iunlock(ip, XFS_IOLOCK_SHARED); |
acdda3aa | 274 | |
16d4d435 CH |
275 | return ret; |
276 | } | |
277 | ||
f021bd07 | 278 | static noinline ssize_t |
16d4d435 CH |
279 | xfs_file_dax_read( |
280 | struct kiocb *iocb, | |
281 | struct iov_iter *to) | |
282 | { | |
6c31f495 | 283 | struct xfs_inode *ip = XFS_I(iocb->ki_filp->f_mapping->host); |
16d4d435 CH |
284 | ssize_t ret = 0; |
285 | ||
3e40b13c | 286 | trace_xfs_file_dax_read(iocb, to); |
16d4d435 | 287 | |
3e40b13c | 288 | if (!iov_iter_count(to)) |
16d4d435 CH |
289 | return 0; /* skip atime */ |
290 | ||
f50b8f47 CH |
291 | ret = xfs_ilock_iocb(iocb, XFS_IOLOCK_SHARED); |
292 | if (ret) | |
293 | return ret; | |
690c2a38 | 294 | ret = dax_iomap_rw(iocb, to, &xfs_read_iomap_ops); |
65523218 | 295 | xfs_iunlock(ip, XFS_IOLOCK_SHARED); |
bbc5a740 | 296 | |
f1285ff0 | 297 | file_accessed(iocb->ki_filp); |
bbc5a740 CH |
298 | return ret; |
299 | } | |
300 | ||
301 | STATIC ssize_t | |
ee1b218b | 302 | xfs_file_buffered_read( |
bbc5a740 CH |
303 | struct kiocb *iocb, |
304 | struct iov_iter *to) | |
305 | { | |
306 | struct xfs_inode *ip = XFS_I(file_inode(iocb->ki_filp)); | |
307 | ssize_t ret; | |
308 | ||
3e40b13c | 309 | trace_xfs_file_buffered_read(iocb, to); |
dda35b8f | 310 | |
f50b8f47 CH |
311 | ret = xfs_ilock_iocb(iocb, XFS_IOLOCK_SHARED); |
312 | if (ret) | |
313 | return ret; | |
b4f5d2c6 | 314 | ret = generic_file_read_iter(iocb, to); |
65523218 | 315 | xfs_iunlock(ip, XFS_IOLOCK_SHARED); |
bbc5a740 CH |
316 | |
317 | return ret; | |
318 | } | |
319 | ||
320 | STATIC ssize_t | |
321 | xfs_file_read_iter( | |
322 | struct kiocb *iocb, | |
323 | struct iov_iter *to) | |
324 | { | |
16d4d435 CH |
325 | struct inode *inode = file_inode(iocb->ki_filp); |
326 | struct xfs_mount *mp = XFS_I(inode)->i_mount; | |
bbc5a740 CH |
327 | ssize_t ret = 0; |
328 | ||
329 | XFS_STATS_INC(mp, xs_read_calls); | |
330 | ||
75c8c50f | 331 | if (xfs_is_shutdown(mp)) |
bbc5a740 CH |
332 | return -EIO; |
333 | ||
16d4d435 CH |
334 | if (IS_DAX(inode)) |
335 | ret = xfs_file_dax_read(iocb, to); | |
336 | else if (iocb->ki_flags & IOCB_DIRECT) | |
ee1b218b | 337 | ret = xfs_file_dio_read(iocb, to); |
3176c3e0 | 338 | else |
ee1b218b | 339 | ret = xfs_file_buffered_read(iocb, to); |
dda35b8f | 340 | |
dda35b8f | 341 | if (ret > 0) |
ff6d6af2 | 342 | XFS_STATS_ADD(mp, xs_read_bytes, ret); |
dda35b8f CH |
343 | return ret; |
344 | } | |
345 | ||
54919f94 DH |
346 | STATIC ssize_t |
347 | xfs_file_splice_read( | |
348 | struct file *in, | |
349 | loff_t *ppos, | |
350 | struct pipe_inode_info *pipe, | |
351 | size_t len, | |
352 | unsigned int flags) | |
353 | { | |
354 | struct inode *inode = file_inode(in); | |
355 | struct xfs_inode *ip = XFS_I(inode); | |
356 | struct xfs_mount *mp = ip->i_mount; | |
357 | ssize_t ret = 0; | |
358 | ||
359 | XFS_STATS_INC(mp, xs_read_calls); | |
360 | ||
361 | if (xfs_is_shutdown(mp)) | |
362 | return -EIO; | |
363 | ||
364 | trace_xfs_file_splice_read(ip, *ppos, len); | |
365 | ||
366 | xfs_ilock(ip, XFS_IOLOCK_SHARED); | |
367 | ret = filemap_splice_read(in, ppos, pipe, len, flags); | |
368 | xfs_iunlock(ip, XFS_IOLOCK_SHARED); | |
369 | if (ret > 0) | |
370 | XFS_STATS_ADD(mp, xs_read_bytes, ret); | |
371 | return ret; | |
372 | } | |
373 | ||
4d8d1581 DC |
374 | /* |
375 | * Common pre-write limit and setup checks. | |
376 | * | |
5bf1f262 CH |
377 | * Called with the iolocked held either shared and exclusive according to |
378 | * @iolock, and returns with it held. Might upgrade the iolock to exclusive | |
379 | * if called for a direct write beyond i_size. | |
4d8d1581 DC |
380 | */ |
381 | STATIC ssize_t | |
ee1b218b | 382 | xfs_file_write_checks( |
99733fa3 AV |
383 | struct kiocb *iocb, |
384 | struct iov_iter *from, | |
a1033753 | 385 | unsigned int *iolock) |
4d8d1581 | 386 | { |
99733fa3 | 387 | struct file *file = iocb->ki_filp; |
4d8d1581 DC |
388 | struct inode *inode = file->f_mapping->host; |
389 | struct xfs_inode *ip = XFS_I(inode); | |
3309dd04 | 390 | ssize_t error = 0; |
99733fa3 | 391 | size_t count = iov_iter_count(from); |
3136e8bb | 392 | bool drained_dio = false; |
f5c54717 | 393 | loff_t isize; |
4d8d1581 | 394 | |
7271d243 | 395 | restart: |
3309dd04 AV |
396 | error = generic_write_checks(iocb, from); |
397 | if (error <= 0) | |
4d8d1581 | 398 | return error; |
4d8d1581 | 399 | |
354be7e3 CH |
400 | if (iocb->ki_flags & IOCB_NOWAIT) { |
401 | error = break_layout(inode, false); | |
402 | if (error == -EWOULDBLOCK) | |
403 | error = -EAGAIN; | |
404 | } else { | |
405 | error = xfs_break_layouts(inode, iolock, BREAK_WRITE); | |
406 | } | |
407 | ||
781355c6 CH |
408 | if (error) |
409 | return error; | |
410 | ||
65523218 CH |
411 | /* |
412 | * For changing security info in file_remove_privs() we need i_rwsem | |
413 | * exclusively. | |
414 | */ | |
a6de82ca | 415 | if (*iolock == XFS_IOLOCK_SHARED && !IS_NOSEC(inode)) { |
65523218 | 416 | xfs_iunlock(ip, *iolock); |
a6de82ca | 417 | *iolock = XFS_IOLOCK_EXCL; |
354be7e3 CH |
418 | error = xfs_ilock_iocb(iocb, *iolock); |
419 | if (error) { | |
420 | *iolock = 0; | |
421 | return error; | |
422 | } | |
a6de82ca JK |
423 | goto restart; |
424 | } | |
977ec4dd | 425 | |
4d8d1581 DC |
426 | /* |
427 | * If the offset is beyond the size of the file, we need to zero any | |
428 | * blocks that fall between the existing EOF and the start of this | |
977ec4dd DC |
429 | * write. If zeroing is needed and we are currently holding the iolock |
430 | * shared, we need to update it to exclusive which implies having to | |
431 | * redo all checks before. | |
432 | * | |
433 | * We need to serialise against EOF updates that occur in IO completions | |
434 | * here. We want to make sure that nobody is changing the size while we | |
435 | * do this check until we have placed an IO barrier (i.e. hold the | |
436 | * XFS_IOLOCK_EXCL) that prevents new IO from being dispatched. The | |
437 | * spinlock effectively forms a memory barrier once we have the | |
438 | * XFS_IOLOCK_EXCL so we are guaranteed to see the latest EOF value and | |
439 | * hence be able to correctly determine if we need to run zeroing. | |
b9d59846 | 440 | * |
977ec4dd DC |
441 | * We can do an unlocked check here safely as IO completion can only |
442 | * extend EOF. Truncate is locked out at this point, so the EOF can | |
443 | * not move backwards, only forwards. Hence we only need to take the | |
444 | * slow path and spin locks when we are at or beyond the current EOF. | |
4d8d1581 | 445 | */ |
977ec4dd DC |
446 | if (iocb->ki_pos <= i_size_read(inode)) |
447 | goto out; | |
448 | ||
b9d59846 | 449 | spin_lock(&ip->i_flags_lock); |
f5c54717 CH |
450 | isize = i_size_read(inode); |
451 | if (iocb->ki_pos > isize) { | |
b9d59846 | 452 | spin_unlock(&ip->i_flags_lock); |
354be7e3 CH |
453 | |
454 | if (iocb->ki_flags & IOCB_NOWAIT) | |
455 | return -EAGAIN; | |
456 | ||
3136e8bb BF |
457 | if (!drained_dio) { |
458 | if (*iolock == XFS_IOLOCK_SHARED) { | |
65523218 | 459 | xfs_iunlock(ip, *iolock); |
3136e8bb | 460 | *iolock = XFS_IOLOCK_EXCL; |
65523218 | 461 | xfs_ilock(ip, *iolock); |
3136e8bb BF |
462 | iov_iter_reexpand(from, count); |
463 | } | |
40c63fbc DC |
464 | /* |
465 | * We now have an IO submission barrier in place, but | |
466 | * AIO can do EOF updates during IO completion and hence | |
467 | * we now need to wait for all of them to drain. Non-AIO | |
468 | * DIO will have drained before we are given the | |
469 | * XFS_IOLOCK_EXCL, and so for most cases this wait is a | |
470 | * no-op. | |
471 | */ | |
472 | inode_dio_wait(inode); | |
3136e8bb | 473 | drained_dio = true; |
7271d243 DC |
474 | goto restart; |
475 | } | |
977ec4dd | 476 | |
f5c54717 | 477 | trace_xfs_zero_eof(ip, isize, iocb->ki_pos - isize); |
f1ba5faf | 478 | error = xfs_zero_range(ip, isize, iocb->ki_pos - isize, NULL); |
467f7899 CH |
479 | if (error) |
480 | return error; | |
b9d59846 DC |
481 | } else |
482 | spin_unlock(&ip->i_flags_lock); | |
4d8d1581 | 483 | |
977ec4dd | 484 | out: |
1aa91d9c | 485 | return kiocb_modified(iocb); |
4d8d1581 DC |
486 | } |
487 | ||
acdda3aa CH |
488 | static int |
489 | xfs_dio_write_end_io( | |
490 | struct kiocb *iocb, | |
491 | ssize_t size, | |
6fe7b990 | 492 | int error, |
acdda3aa CH |
493 | unsigned flags) |
494 | { | |
495 | struct inode *inode = file_inode(iocb->ki_filp); | |
496 | struct xfs_inode *ip = XFS_I(inode); | |
497 | loff_t offset = iocb->ki_pos; | |
73d30d48 | 498 | unsigned int nofs_flag; |
acdda3aa CH |
499 | |
500 | trace_xfs_end_io_direct_write(ip, offset, size); | |
501 | ||
75c8c50f | 502 | if (xfs_is_shutdown(ip->i_mount)) |
acdda3aa CH |
503 | return -EIO; |
504 | ||
6fe7b990 MB |
505 | if (error) |
506 | return error; | |
507 | if (!size) | |
508 | return 0; | |
acdda3aa | 509 | |
ed5c3e66 DC |
510 | /* |
511 | * Capture amount written on completion as we can't reliably account | |
512 | * for it on submission. | |
513 | */ | |
514 | XFS_STATS_ADD(ip->i_mount, xs_write_bytes, size); | |
515 | ||
73d30d48 CH |
516 | /* |
517 | * We can allocate memory here while doing writeback on behalf of | |
518 | * memory reclaim. To avoid memory allocation deadlocks set the | |
519 | * task-wide nofs context for the following operations. | |
520 | */ | |
521 | nofs_flag = memalloc_nofs_save(); | |
522 | ||
ee70daab EG |
523 | if (flags & IOMAP_DIO_COW) { |
524 | error = xfs_reflink_end_cow(ip, offset, size); | |
525 | if (error) | |
73d30d48 | 526 | goto out; |
ee70daab EG |
527 | } |
528 | ||
529 | /* | |
530 | * Unwritten conversion updates the in-core isize after extent | |
531 | * conversion but before updating the on-disk size. Updating isize any | |
532 | * earlier allows a racing dio read to find unwritten extents before | |
533 | * they are converted. | |
534 | */ | |
73d30d48 CH |
535 | if (flags & IOMAP_DIO_UNWRITTEN) { |
536 | error = xfs_iomap_write_unwritten(ip, offset, size, true); | |
537 | goto out; | |
538 | } | |
ee70daab | 539 | |
acdda3aa CH |
540 | /* |
541 | * We need to update the in-core inode size here so that we don't end up | |
542 | * with the on-disk inode size being outside the in-core inode size. We | |
543 | * have no other method of updating EOF for AIO, so always do it here | |
544 | * if necessary. | |
545 | * | |
546 | * We need to lock the test/set EOF update as we can be racing with | |
547 | * other IO completions here to update the EOF. Failing to serialise | |
548 | * here can result in EOF moving backwards and Bad Things Happen when | |
549 | * that occurs. | |
977ec4dd DC |
550 | * |
551 | * As IO completion only ever extends EOF, we can do an unlocked check | |
552 | * here to avoid taking the spinlock. If we land within the current EOF, | |
553 | * then we do not need to do an extending update at all, and we don't | |
554 | * need to take the lock to check this. If we race with an update moving | |
555 | * EOF, then we'll either still be beyond EOF and need to take the lock, | |
556 | * or we'll be within EOF and we don't need to take it at all. | |
acdda3aa | 557 | */ |
977ec4dd DC |
558 | if (offset + size <= i_size_read(inode)) |
559 | goto out; | |
560 | ||
acdda3aa CH |
561 | spin_lock(&ip->i_flags_lock); |
562 | if (offset + size > i_size_read(inode)) { | |
563 | i_size_write(inode, offset + size); | |
ee70daab | 564 | spin_unlock(&ip->i_flags_lock); |
acdda3aa | 565 | error = xfs_setfilesize(ip, offset, size); |
ee70daab EG |
566 | } else { |
567 | spin_unlock(&ip->i_flags_lock); | |
568 | } | |
acdda3aa | 569 | |
73d30d48 CH |
570 | out: |
571 | memalloc_nofs_restore(nofs_flag); | |
acdda3aa CH |
572 | return error; |
573 | } | |
574 | ||
838c4f3d CH |
575 | static const struct iomap_dio_ops xfs_dio_write_ops = { |
576 | .end_io = xfs_dio_write_end_io, | |
577 | }; | |
578 | ||
f0d26e86 | 579 | /* |
caa89dbc | 580 | * Handle block aligned direct I/O writes |
f0d26e86 | 581 | */ |
caa89dbc DC |
582 | static noinline ssize_t |
583 | xfs_file_dio_write_aligned( | |
584 | struct xfs_inode *ip, | |
f0d26e86 | 585 | struct kiocb *iocb, |
b3188919 | 586 | struct iov_iter *from) |
f0d26e86 | 587 | { |
a1033753 | 588 | unsigned int iolock = XFS_IOLOCK_SHARED; |
caa89dbc | 589 | ssize_t ret; |
f0d26e86 | 590 | |
14a53798 | 591 | ret = xfs_ilock_iocb_for_write(iocb, &iolock); |
caa89dbc DC |
592 | if (ret) |
593 | return ret; | |
594 | ret = xfs_file_write_checks(iocb, from, &iolock); | |
595 | if (ret) | |
596 | goto out_unlock; | |
f0d26e86 | 597 | |
7271d243 | 598 | /* |
caa89dbc DC |
599 | * We don't need to hold the IOLOCK exclusively across the IO, so demote |
600 | * the iolock back to shared if we had to take the exclusive lock in | |
601 | * xfs_file_write_checks() for other reasons. | |
7271d243 | 602 | */ |
caa89dbc DC |
603 | if (iolock == XFS_IOLOCK_EXCL) { |
604 | xfs_ilock_demote(ip, XFS_IOLOCK_EXCL); | |
d0606464 | 605 | iolock = XFS_IOLOCK_SHARED; |
c58cb165 | 606 | } |
caa89dbc DC |
607 | trace_xfs_file_direct_write(iocb, from); |
608 | ret = iomap_dio_rw(iocb, from, &xfs_direct_write_iomap_ops, | |
786f847f | 609 | &xfs_dio_write_ops, 0, NULL, 0); |
caa89dbc DC |
610 | out_unlock: |
611 | if (iolock) | |
612 | xfs_iunlock(ip, iolock); | |
613 | return ret; | |
614 | } | |
f0d26e86 | 615 | |
caa89dbc DC |
616 | /* |
617 | * Handle block unaligned direct I/O writes | |
618 | * | |
619 | * In most cases direct I/O writes will be done holding IOLOCK_SHARED, allowing | |
620 | * them to be done in parallel with reads and other direct I/O writes. However, | |
621 | * if the I/O is not aligned to filesystem blocks, the direct I/O layer may need | |
622 | * to do sub-block zeroing and that requires serialisation against other direct | |
623 | * I/O to the same block. In this case we need to serialise the submission of | |
624 | * the unaligned I/O so that we don't get racing block zeroing in the dio layer. | |
ed1128c2 DC |
625 | * In the case where sub-block zeroing is not required, we can do concurrent |
626 | * sub-block dios to the same block successfully. | |
caa89dbc | 627 | * |
ed1128c2 DC |
628 | * Optimistically submit the I/O using the shared lock first, but use the |
629 | * IOMAP_DIO_OVERWRITE_ONLY flag to tell the lower layers to return -EAGAIN | |
630 | * if block allocation or partial block zeroing would be required. In that case | |
631 | * we try again with the exclusive lock. | |
caa89dbc DC |
632 | */ |
633 | static noinline ssize_t | |
634 | xfs_file_dio_write_unaligned( | |
635 | struct xfs_inode *ip, | |
636 | struct kiocb *iocb, | |
637 | struct iov_iter *from) | |
638 | { | |
ed1128c2 DC |
639 | size_t isize = i_size_read(VFS_I(ip)); |
640 | size_t count = iov_iter_count(from); | |
a1033753 | 641 | unsigned int iolock = XFS_IOLOCK_SHARED; |
ed1128c2 | 642 | unsigned int flags = IOMAP_DIO_OVERWRITE_ONLY; |
caa89dbc DC |
643 | ssize_t ret; |
644 | ||
ed1128c2 DC |
645 | /* |
646 | * Extending writes need exclusivity because of the sub-block zeroing | |
647 | * that the DIO code always does for partial tail blocks beyond EOF, so | |
648 | * don't even bother trying the fast path in this case. | |
649 | */ | |
650 | if (iocb->ki_pos > isize || iocb->ki_pos + count >= isize) { | |
ed1128c2 DC |
651 | if (iocb->ki_flags & IOCB_NOWAIT) |
652 | return -EAGAIN; | |
93e6aa43 | 653 | retry_exclusive: |
ed1128c2 DC |
654 | iolock = XFS_IOLOCK_EXCL; |
655 | flags = IOMAP_DIO_FORCE_WAIT; | |
656 | } | |
657 | ||
14a53798 | 658 | ret = xfs_ilock_iocb_for_write(iocb, &iolock); |
ed1128c2 DC |
659 | if (ret) |
660 | return ret; | |
caa89dbc DC |
661 | |
662 | /* | |
663 | * We can't properly handle unaligned direct I/O to reflink files yet, | |
664 | * as we can't unshare a partial block. | |
665 | */ | |
666 | if (xfs_is_cow_inode(ip)) { | |
667 | trace_xfs_reflink_bounce_dio_write(iocb, from); | |
668 | ret = -ENOTBLK; | |
669 | goto out_unlock; | |
29a5d29e | 670 | } |
0ee7a3f6 | 671 | |
ee1b218b | 672 | ret = xfs_file_write_checks(iocb, from, &iolock); |
4d8d1581 | 673 | if (ret) |
caa89dbc | 674 | goto out_unlock; |
f0d26e86 | 675 | |
eda77982 | 676 | /* |
ed1128c2 DC |
677 | * If we are doing exclusive unaligned I/O, this must be the only I/O |
678 | * in-flight. Otherwise we risk data corruption due to unwritten extent | |
679 | * conversions from the AIO end_io handler. Wait for all other I/O to | |
680 | * drain first. | |
eda77982 | 681 | */ |
ed1128c2 DC |
682 | if (flags & IOMAP_DIO_FORCE_WAIT) |
683 | inode_dio_wait(VFS_I(ip)); | |
f0d26e86 | 684 | |
3e40b13c | 685 | trace_xfs_file_direct_write(iocb, from); |
f150b423 | 686 | ret = iomap_dio_rw(iocb, from, &xfs_direct_write_iomap_ops, |
786f847f | 687 | &xfs_dio_write_ops, flags, NULL, 0); |
ed1128c2 DC |
688 | |
689 | /* | |
690 | * Retry unaligned I/O with exclusive blocking semantics if the DIO | |
691 | * layer rejected it for mapping or locking reasons. If we are doing | |
692 | * nonblocking user I/O, propagate the error. | |
693 | */ | |
694 | if (ret == -EAGAIN && !(iocb->ki_flags & IOCB_NOWAIT)) { | |
695 | ASSERT(flags & IOMAP_DIO_OVERWRITE_ONLY); | |
696 | xfs_iunlock(ip, iolock); | |
697 | goto retry_exclusive; | |
698 | } | |
699 | ||
caa89dbc | 700 | out_unlock: |
354be7e3 CH |
701 | if (iolock) |
702 | xfs_iunlock(ip, iolock); | |
16d4d435 CH |
703 | return ret; |
704 | } | |
705 | ||
caa89dbc DC |
706 | static ssize_t |
707 | xfs_file_dio_write( | |
708 | struct kiocb *iocb, | |
709 | struct iov_iter *from) | |
710 | { | |
711 | struct xfs_inode *ip = XFS_I(file_inode(iocb->ki_filp)); | |
712 | struct xfs_buftarg *target = xfs_inode_buftarg(ip); | |
713 | size_t count = iov_iter_count(from); | |
714 | ||
715 | /* direct I/O must be aligned to device logical sector size */ | |
716 | if ((iocb->ki_pos | count) & target->bt_logical_sectormask) | |
717 | return -EINVAL; | |
718 | if ((iocb->ki_pos | count) & ip->i_mount->m_blockmask) | |
719 | return xfs_file_dio_write_unaligned(ip, iocb, from); | |
720 | return xfs_file_dio_write_aligned(ip, iocb, from); | |
721 | } | |
722 | ||
f021bd07 | 723 | static noinline ssize_t |
16d4d435 CH |
724 | xfs_file_dax_write( |
725 | struct kiocb *iocb, | |
726 | struct iov_iter *from) | |
727 | { | |
6c31f495 | 728 | struct inode *inode = iocb->ki_filp->f_mapping->host; |
16d4d435 | 729 | struct xfs_inode *ip = XFS_I(inode); |
a1033753 | 730 | unsigned int iolock = XFS_IOLOCK_EXCL; |
6c31f495 | 731 | ssize_t ret, error = 0; |
6c31f495 | 732 | loff_t pos; |
16d4d435 | 733 | |
f50b8f47 CH |
734 | ret = xfs_ilock_iocb(iocb, iolock); |
735 | if (ret) | |
736 | return ret; | |
ee1b218b | 737 | ret = xfs_file_write_checks(iocb, from, &iolock); |
16d4d435 CH |
738 | if (ret) |
739 | goto out; | |
740 | ||
6c31f495 | 741 | pos = iocb->ki_pos; |
8b2180b3 | 742 | |
3e40b13c | 743 | trace_xfs_file_dax_write(iocb, from); |
ea6c49b7 | 744 | ret = dax_iomap_rw(iocb, from, &xfs_dax_write_iomap_ops); |
6c31f495 CH |
745 | if (ret > 0 && iocb->ki_pos > i_size_read(inode)) { |
746 | i_size_write(inode, iocb->ki_pos); | |
747 | error = xfs_setfilesize(ip, pos, ret); | |
16d4d435 | 748 | } |
16d4d435 | 749 | out: |
354be7e3 CH |
750 | if (iolock) |
751 | xfs_iunlock(ip, iolock); | |
ed5c3e66 DC |
752 | if (error) |
753 | return error; | |
754 | ||
755 | if (ret > 0) { | |
756 | XFS_STATS_ADD(ip->i_mount, xs_write_bytes, ret); | |
757 | ||
758 | /* Handle various SYNC-type writes */ | |
759 | ret = generic_write_sync(iocb, ret); | |
760 | } | |
761 | return ret; | |
f0d26e86 DC |
762 | } |
763 | ||
00258e36 | 764 | STATIC ssize_t |
ee1b218b | 765 | xfs_file_buffered_write( |
dda35b8f | 766 | struct kiocb *iocb, |
b3188919 | 767 | struct iov_iter *from) |
dda35b8f | 768 | { |
2d9ac431 | 769 | struct inode *inode = iocb->ki_filp->f_mapping->host; |
00258e36 | 770 | struct xfs_inode *ip = XFS_I(inode); |
637bbc75 | 771 | ssize_t ret; |
a636b1d1 | 772 | bool cleared_space = false; |
a1033753 | 773 | unsigned int iolock; |
dda35b8f | 774 | |
c3155097 BF |
775 | write_retry: |
776 | iolock = XFS_IOLOCK_EXCL; | |
1aa91d9c SR |
777 | ret = xfs_ilock_iocb(iocb, iolock); |
778 | if (ret) | |
779 | return ret; | |
dda35b8f | 780 | |
ee1b218b | 781 | ret = xfs_file_write_checks(iocb, from, &iolock); |
4d8d1581 | 782 | if (ret) |
d0606464 | 783 | goto out; |
dda35b8f | 784 | |
3e40b13c | 785 | trace_xfs_file_buffered_write(iocb, from); |
f150b423 CH |
786 | ret = iomap_file_buffered_write(iocb, from, |
787 | &xfs_buffered_write_iomap_ops); | |
dc06f398 | 788 | |
637bbc75 | 789 | /* |
dc06f398 BF |
790 | * If we hit a space limit, try to free up some lingering preallocated |
791 | * space before returning an error. In the case of ENOSPC, first try to | |
792 | * write back all dirty inodes to free up some of the excess reserved | |
793 | * metadata space. This reduces the chances that the eofblocks scan | |
794 | * waits on dirty mappings. Since xfs_flush_inodes() is serialized, this | |
795 | * also behaves as a filter to prevent too many eofblocks scans from | |
111068f8 DW |
796 | * running at the same time. Use a synchronous scan to increase the |
797 | * effectiveness of the scan. | |
637bbc75 | 798 | */ |
a636b1d1 | 799 | if (ret == -EDQUOT && !cleared_space) { |
c3155097 | 800 | xfs_iunlock(ip, iolock); |
2d53f66b | 801 | xfs_blockgc_free_quota(ip, XFS_ICWALK_FLAG_SYNC); |
111068f8 DW |
802 | cleared_space = true; |
803 | goto write_retry; | |
a636b1d1 | 804 | } else if (ret == -ENOSPC && !cleared_space) { |
b26b2bf1 | 805 | struct xfs_icwalk icw = {0}; |
dc06f398 | 806 | |
a636b1d1 | 807 | cleared_space = true; |
9aa05000 | 808 | xfs_flush_inodes(ip->i_mount); |
c3155097 BF |
809 | |
810 | xfs_iunlock(ip, iolock); | |
b26b2bf1 DW |
811 | icw.icw_flags = XFS_ICWALK_FLAG_SYNC; |
812 | xfs_blockgc_free_space(ip->i_mount, &icw); | |
9aa05000 | 813 | goto write_retry; |
dda35b8f | 814 | } |
d0606464 | 815 | |
d0606464 | 816 | out: |
c3155097 BF |
817 | if (iolock) |
818 | xfs_iunlock(ip, iolock); | |
ed5c3e66 DC |
819 | |
820 | if (ret > 0) { | |
821 | XFS_STATS_ADD(ip->i_mount, xs_write_bytes, ret); | |
822 | /* Handle various SYNC-type writes */ | |
823 | ret = generic_write_sync(iocb, ret); | |
824 | } | |
637bbc75 DC |
825 | return ret; |
826 | } | |
827 | ||
828 | STATIC ssize_t | |
bf97f3bc | 829 | xfs_file_write_iter( |
637bbc75 | 830 | struct kiocb *iocb, |
bf97f3bc | 831 | struct iov_iter *from) |
637bbc75 | 832 | { |
2d9ac431 | 833 | struct inode *inode = iocb->ki_filp->f_mapping->host; |
637bbc75 DC |
834 | struct xfs_inode *ip = XFS_I(inode); |
835 | ssize_t ret; | |
bf97f3bc | 836 | size_t ocount = iov_iter_count(from); |
637bbc75 | 837 | |
ff6d6af2 | 838 | XFS_STATS_INC(ip->i_mount, xs_write_calls); |
637bbc75 | 839 | |
637bbc75 DC |
840 | if (ocount == 0) |
841 | return 0; | |
842 | ||
75c8c50f | 843 | if (xfs_is_shutdown(ip->i_mount)) |
bf97f3bc | 844 | return -EIO; |
637bbc75 | 845 | |
16d4d435 | 846 | if (IS_DAX(inode)) |
ed5c3e66 DC |
847 | return xfs_file_dax_write(iocb, from); |
848 | ||
849 | if (iocb->ki_flags & IOCB_DIRECT) { | |
0613f16c DW |
850 | /* |
851 | * Allow a directio write to fall back to a buffered | |
852 | * write *only* in the case that we're doing a reflink | |
853 | * CoW. In all other directio scenarios we do not | |
854 | * allow an operation to fall back to buffered mode. | |
855 | */ | |
ee1b218b | 856 | ret = xfs_file_dio_write(iocb, from); |
80e543ae | 857 | if (ret != -ENOTBLK) |
ed5c3e66 | 858 | return ret; |
0613f16c | 859 | } |
dda35b8f | 860 | |
ee1b218b | 861 | return xfs_file_buffered_write(iocb, from); |
dda35b8f CH |
862 | } |
863 | ||
d6dc57e2 DW |
864 | static void |
865 | xfs_wait_dax_page( | |
e25ff835 | 866 | struct inode *inode) |
d6dc57e2 DW |
867 | { |
868 | struct xfs_inode *ip = XFS_I(inode); | |
869 | ||
d6dc57e2 DW |
870 | xfs_iunlock(ip, XFS_MMAPLOCK_EXCL); |
871 | schedule(); | |
872 | xfs_ilock(ip, XFS_MMAPLOCK_EXCL); | |
873 | } | |
874 | ||
13f9e267 | 875 | int |
d6dc57e2 DW |
876 | xfs_break_dax_layouts( |
877 | struct inode *inode, | |
e25ff835 | 878 | bool *retry) |
d6dc57e2 DW |
879 | { |
880 | struct page *page; | |
881 | ||
3fed24ff | 882 | xfs_assert_ilocked(XFS_I(inode), XFS_MMAPLOCK_EXCL); |
d6dc57e2 DW |
883 | |
884 | page = dax_layout_busy_page(inode->i_mapping); | |
885 | if (!page) | |
886 | return 0; | |
887 | ||
e25ff835 | 888 | *retry = true; |
d6dc57e2 DW |
889 | return ___wait_var_event(&page->_refcount, |
890 | atomic_read(&page->_refcount) == 1, TASK_INTERRUPTIBLE, | |
e25ff835 | 891 | 0, 0, xfs_wait_dax_page(inode)); |
d6dc57e2 DW |
892 | } |
893 | ||
69eb5fa1 DW |
894 | int |
895 | xfs_break_layouts( | |
896 | struct inode *inode, | |
897 | uint *iolock, | |
898 | enum layout_break_reason reason) | |
899 | { | |
900 | bool retry; | |
d6dc57e2 | 901 | int error; |
69eb5fa1 | 902 | |
3fed24ff | 903 | xfs_assert_ilocked(XFS_I(inode), XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL); |
69eb5fa1 | 904 | |
d6dc57e2 DW |
905 | do { |
906 | retry = false; | |
907 | switch (reason) { | |
908 | case BREAK_UNMAP: | |
a4722a64 | 909 | error = xfs_break_dax_layouts(inode, &retry); |
d6dc57e2 DW |
910 | if (error || retry) |
911 | break; | |
53004ee7 | 912 | fallthrough; |
d6dc57e2 DW |
913 | case BREAK_WRITE: |
914 | error = xfs_break_leased_layouts(inode, iolock, &retry); | |
915 | break; | |
916 | default: | |
917 | WARN_ON_ONCE(1); | |
918 | error = -EINVAL; | |
919 | } | |
920 | } while (error == 0 && retry); | |
921 | ||
922 | return error; | |
69eb5fa1 DW |
923 | } |
924 | ||
cea267c2 DC |
925 | /* Does this file, inode, or mount want synchronous writes? */ |
926 | static inline bool xfs_file_sync_writes(struct file *filp) | |
927 | { | |
928 | struct xfs_inode *ip = XFS_I(file_inode(filp)); | |
929 | ||
930 | if (xfs_has_wsync(ip->i_mount)) | |
931 | return true; | |
932 | if (filp->f_flags & (__O_SYNC | O_DSYNC)) | |
933 | return true; | |
934 | if (IS_SYNC(file_inode(filp))) | |
935 | return true; | |
936 | ||
937 | return false; | |
938 | } | |
939 | ||
a904b1ca NJ |
940 | #define XFS_FALLOC_FL_SUPPORTED \ |
941 | (FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE | \ | |
942 | FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE | \ | |
98cc2db5 | 943 | FALLOC_FL_INSERT_RANGE | FALLOC_FL_UNSHARE_RANGE) |
a904b1ca | 944 | |
2fe17c10 CH |
945 | STATIC long |
946 | xfs_file_fallocate( | |
83aee9e4 CH |
947 | struct file *file, |
948 | int mode, | |
949 | loff_t offset, | |
950 | loff_t len) | |
2fe17c10 | 951 | { |
83aee9e4 CH |
952 | struct inode *inode = file_inode(file); |
953 | struct xfs_inode *ip = XFS_I(inode); | |
83aee9e4 | 954 | long error; |
c63a8eae | 955 | uint iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL; |
83aee9e4 | 956 | loff_t new_size = 0; |
749f24f3 | 957 | bool do_file_insert = false; |
2fe17c10 | 958 | |
83aee9e4 CH |
959 | if (!S_ISREG(inode->i_mode)) |
960 | return -EINVAL; | |
a904b1ca | 961 | if (mode & ~XFS_FALLOC_FL_SUPPORTED) |
2fe17c10 CH |
962 | return -EOPNOTSUPP; |
963 | ||
781355c6 | 964 | xfs_ilock(ip, iolock); |
69eb5fa1 | 965 | error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP); |
781355c6 CH |
966 | if (error) |
967 | goto out_unlock; | |
968 | ||
249bd908 DC |
969 | /* |
970 | * Must wait for all AIO to complete before we continue as AIO can | |
971 | * change the file size on completion without holding any locks we | |
972 | * currently hold. We must do this first because AIO can update both | |
973 | * the on disk and in memory inode sizes, and the operations that follow | |
974 | * require the in-memory size to be fully up-to-date. | |
975 | */ | |
976 | inode_dio_wait(inode); | |
977 | ||
978 | /* | |
979 | * Now AIO and DIO has drained we flush and (if necessary) invalidate | |
980 | * the cached range over the first operation we are about to run. | |
981 | * | |
982 | * We care about zero and collapse here because they both run a hole | |
983 | * punch over the range first. Because that can zero data, and the range | |
984 | * of invalidation for the shift operations is much larger, we still do | |
985 | * the required flush for collapse in xfs_prepare_shift(). | |
986 | * | |
987 | * Insert has the same range requirements as collapse, and we extend the | |
988 | * file first which can zero data. Hence insert has the same | |
989 | * flush/invalidate requirements as collapse and so they are both | |
990 | * handled at the right time by xfs_prepare_shift(). | |
991 | */ | |
992 | if (mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_ZERO_RANGE | | |
993 | FALLOC_FL_COLLAPSE_RANGE)) { | |
994 | error = xfs_flush_unmap_range(ip, offset, len); | |
995 | if (error) | |
996 | goto out_unlock; | |
997 | } | |
998 | ||
fbe7e520 DC |
999 | error = file_modified(file); |
1000 | if (error) | |
1001 | goto out_unlock; | |
1002 | ||
83aee9e4 CH |
1003 | if (mode & FALLOC_FL_PUNCH_HOLE) { |
1004 | error = xfs_free_file_space(ip, offset, len); | |
1005 | if (error) | |
1006 | goto out_unlock; | |
e1d8fb88 | 1007 | } else if (mode & FALLOC_FL_COLLAPSE_RANGE) { |
25219dbf | 1008 | if (!xfs_is_falloc_aligned(ip, offset, len)) { |
2451337d | 1009 | error = -EINVAL; |
e1d8fb88 NJ |
1010 | goto out_unlock; |
1011 | } | |
1012 | ||
23fffa92 LC |
1013 | /* |
1014 | * There is no need to overlap collapse range with EOF, | |
1015 | * in which case it is effectively a truncate operation | |
1016 | */ | |
1017 | if (offset + len >= i_size_read(inode)) { | |
2451337d | 1018 | error = -EINVAL; |
23fffa92 LC |
1019 | goto out_unlock; |
1020 | } | |
1021 | ||
e1d8fb88 NJ |
1022 | new_size = i_size_read(inode) - len; |
1023 | ||
1024 | error = xfs_collapse_file_space(ip, offset, len); | |
1025 | if (error) | |
1026 | goto out_unlock; | |
a904b1ca | 1027 | } else if (mode & FALLOC_FL_INSERT_RANGE) { |
7d83fb14 | 1028 | loff_t isize = i_size_read(inode); |
a904b1ca | 1029 | |
25219dbf | 1030 | if (!xfs_is_falloc_aligned(ip, offset, len)) { |
a904b1ca NJ |
1031 | error = -EINVAL; |
1032 | goto out_unlock; | |
1033 | } | |
1034 | ||
7d83fb14 DW |
1035 | /* |
1036 | * New inode size must not exceed ->s_maxbytes, accounting for | |
1037 | * possible signed overflow. | |
1038 | */ | |
1039 | if (inode->i_sb->s_maxbytes - isize < len) { | |
a904b1ca NJ |
1040 | error = -EFBIG; |
1041 | goto out_unlock; | |
1042 | } | |
7d83fb14 | 1043 | new_size = isize + len; |
a904b1ca NJ |
1044 | |
1045 | /* Offset should be less than i_size */ | |
7d83fb14 | 1046 | if (offset >= isize) { |
a904b1ca NJ |
1047 | error = -EINVAL; |
1048 | goto out_unlock; | |
1049 | } | |
749f24f3 | 1050 | do_file_insert = true; |
83aee9e4 CH |
1051 | } else { |
1052 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
1053 | offset + len > i_size_read(inode)) { | |
1054 | new_size = offset + len; | |
2451337d | 1055 | error = inode_newsize_ok(inode, new_size); |
83aee9e4 CH |
1056 | if (error) |
1057 | goto out_unlock; | |
1058 | } | |
2fe17c10 | 1059 | |
66ae56a5 | 1060 | if (mode & FALLOC_FL_ZERO_RANGE) { |
360c09c0 CH |
1061 | /* |
1062 | * Punch a hole and prealloc the range. We use a hole | |
1063 | * punch rather than unwritten extent conversion for two | |
1064 | * reasons: | |
1065 | * | |
1066 | * 1.) Hole punch handles partial block zeroing for us. | |
1067 | * 2.) If prealloc returns ENOSPC, the file range is | |
1068 | * still zero-valued by virtue of the hole punch. | |
1069 | */ | |
1070 | unsigned int blksize = i_blocksize(inode); | |
1071 | ||
1072 | trace_xfs_zero_file_space(ip); | |
1073 | ||
1074 | error = xfs_free_file_space(ip, offset, len); | |
1075 | if (error) | |
1076 | goto out_unlock; | |
1077 | ||
1078 | len = round_up(offset + len, blksize) - | |
1079 | round_down(offset, blksize); | |
1080 | offset = round_down(offset, blksize); | |
66ae56a5 CH |
1081 | } else if (mode & FALLOC_FL_UNSHARE_RANGE) { |
1082 | error = xfs_reflink_unshare(ip, offset, len); | |
1083 | if (error) | |
1084 | goto out_unlock; | |
66ae56a5 CH |
1085 | } else { |
1086 | /* | |
1087 | * If always_cow mode we can't use preallocations and | |
1088 | * thus should not create them. | |
1089 | */ | |
1090 | if (xfs_is_always_cow_inode(ip)) { | |
1091 | error = -EOPNOTSUPP; | |
1092 | goto out_unlock; | |
1093 | } | |
360c09c0 | 1094 | } |
66ae56a5 | 1095 | |
360c09c0 | 1096 | if (!xfs_is_always_cow_inode(ip)) { |
4d1b97f9 | 1097 | error = xfs_alloc_file_space(ip, offset, len); |
360c09c0 CH |
1098 | if (error) |
1099 | goto out_unlock; | |
98cc2db5 | 1100 | } |
fbe7e520 | 1101 | } |
2fe17c10 CH |
1102 | |
1103 | /* Change file size if needed */ | |
1104 | if (new_size) { | |
1105 | struct iattr iattr; | |
1106 | ||
1107 | iattr.ia_valid = ATTR_SIZE; | |
1108 | iattr.ia_size = new_size; | |
c1632a0f | 1109 | error = xfs_vn_setattr_size(file_mnt_idmap(file), |
f736d93d | 1110 | file_dentry(file), &iattr); |
a904b1ca NJ |
1111 | if (error) |
1112 | goto out_unlock; | |
2fe17c10 CH |
1113 | } |
1114 | ||
a904b1ca NJ |
1115 | /* |
1116 | * Perform hole insertion now that the file size has been | |
1117 | * updated so that if we crash during the operation we don't | |
1118 | * leave shifted extents past EOF and hence losing access to | |
1119 | * the data that is contained within them. | |
1120 | */ | |
472c6e46 | 1121 | if (do_file_insert) { |
a904b1ca | 1122 | error = xfs_insert_file_space(ip, offset, len); |
472c6e46 DC |
1123 | if (error) |
1124 | goto out_unlock; | |
1125 | } | |
1126 | ||
cea267c2 | 1127 | if (xfs_file_sync_writes(file)) |
472c6e46 | 1128 | error = xfs_log_force_inode(ip); |
a904b1ca | 1129 | |
2fe17c10 | 1130 | out_unlock: |
781355c6 | 1131 | xfs_iunlock(ip, iolock); |
2451337d | 1132 | return error; |
2fe17c10 CH |
1133 | } |
1134 | ||
40144e49 JK |
1135 | STATIC int |
1136 | xfs_file_fadvise( | |
1137 | struct file *file, | |
1138 | loff_t start, | |
1139 | loff_t end, | |
1140 | int advice) | |
1141 | { | |
1142 | struct xfs_inode *ip = XFS_I(file_inode(file)); | |
1143 | int ret; | |
1144 | int lockflags = 0; | |
1145 | ||
1146 | /* | |
1147 | * Operations creating pages in page cache need protection from hole | |
1148 | * punching and similar ops | |
1149 | */ | |
1150 | if (advice == POSIX_FADV_WILLNEED) { | |
1151 | lockflags = XFS_IOLOCK_SHARED; | |
1152 | xfs_ilock(ip, lockflags); | |
1153 | } | |
1154 | ret = generic_fadvise(file, start, end, advice); | |
1155 | if (lockflags) | |
1156 | xfs_iunlock(ip, lockflags); | |
1157 | return ret; | |
1158 | } | |
3fc9f5e4 | 1159 | |
da034bcc | 1160 | STATIC loff_t |
2e5dfc99 | 1161 | xfs_file_remap_range( |
3fc9f5e4 DW |
1162 | struct file *file_in, |
1163 | loff_t pos_in, | |
1164 | struct file *file_out, | |
1165 | loff_t pos_out, | |
1166 | loff_t len, | |
1167 | unsigned int remap_flags) | |
9fe26045 | 1168 | { |
3fc9f5e4 DW |
1169 | struct inode *inode_in = file_inode(file_in); |
1170 | struct xfs_inode *src = XFS_I(inode_in); | |
1171 | struct inode *inode_out = file_inode(file_out); | |
1172 | struct xfs_inode *dest = XFS_I(inode_out); | |
1173 | struct xfs_mount *mp = src->i_mount; | |
1174 | loff_t remapped = 0; | |
1175 | xfs_extlen_t cowextsize; | |
1176 | int ret; | |
1177 | ||
2e5dfc99 DW |
1178 | if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY)) |
1179 | return -EINVAL; | |
cc714660 | 1180 | |
38c26bfd | 1181 | if (!xfs_has_reflink(mp)) |
3fc9f5e4 DW |
1182 | return -EOPNOTSUPP; |
1183 | ||
75c8c50f | 1184 | if (xfs_is_shutdown(mp)) |
3fc9f5e4 DW |
1185 | return -EIO; |
1186 | ||
1187 | /* Prepare and then clone file data. */ | |
1188 | ret = xfs_reflink_remap_prep(file_in, pos_in, file_out, pos_out, | |
1189 | &len, remap_flags); | |
451d34ee | 1190 | if (ret || len == 0) |
3fc9f5e4 DW |
1191 | return ret; |
1192 | ||
1193 | trace_xfs_reflink_remap_range(src, pos_in, len, dest, pos_out); | |
1194 | ||
1195 | ret = xfs_reflink_remap_blocks(src, pos_in, dest, pos_out, len, | |
1196 | &remapped); | |
1197 | if (ret) | |
1198 | goto out_unlock; | |
1199 | ||
1200 | /* | |
1201 | * Carry the cowextsize hint from src to dest if we're sharing the | |
1202 | * entire source file to the entire destination file, the source file | |
1203 | * has a cowextsize hint, and the destination file does not. | |
1204 | */ | |
1205 | cowextsize = 0; | |
1206 | if (pos_in == 0 && len == i_size_read(inode_in) && | |
3e09ab8f | 1207 | (src->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE) && |
3fc9f5e4 | 1208 | pos_out == 0 && len >= i_size_read(inode_out) && |
3e09ab8f | 1209 | !(dest->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)) |
b33ce57d | 1210 | cowextsize = src->i_cowextsize; |
3fc9f5e4 DW |
1211 | |
1212 | ret = xfs_reflink_update_dest(dest, pos_out + len, cowextsize, | |
1213 | remap_flags); | |
5833112d CH |
1214 | if (ret) |
1215 | goto out_unlock; | |
3fc9f5e4 | 1216 | |
5ffce3cc | 1217 | if (xfs_file_sync_writes(file_in) || xfs_file_sync_writes(file_out)) |
5833112d | 1218 | xfs_log_force_inode(dest); |
3fc9f5e4 | 1219 | out_unlock: |
14a53798 | 1220 | xfs_iunlock2_remapping(src, dest); |
3fc9f5e4 DW |
1221 | if (ret) |
1222 | trace_xfs_reflink_remap_range_error(dest, ret, _RET_IP_); | |
1223 | return remapped > 0 ? remapped : ret; | |
9fe26045 | 1224 | } |
2fe17c10 | 1225 | |
1da177e4 | 1226 | STATIC int |
3562fd45 | 1227 | xfs_file_open( |
1da177e4 | 1228 | struct inode *inode, |
f999a5bf | 1229 | struct file *file) |
1da177e4 | 1230 | { |
75c8c50f | 1231 | if (xfs_is_shutdown(XFS_M(inode->i_sb))) |
f999a5bf | 1232 | return -EIO; |
210a03c9 | 1233 | file->f_mode |= FMODE_NOWAIT | FMODE_CAN_ODIRECT; |
f3bf67c6 | 1234 | return generic_file_open(inode, file); |
f999a5bf CH |
1235 | } |
1236 | ||
1237 | STATIC int | |
1238 | xfs_dir_open( | |
1239 | struct inode *inode, | |
1240 | struct file *file) | |
1241 | { | |
1242 | struct xfs_inode *ip = XFS_I(inode); | |
a1033753 | 1243 | unsigned int mode; |
f999a5bf CH |
1244 | int error; |
1245 | ||
652efdec CH |
1246 | if (xfs_is_shutdown(ip->i_mount)) |
1247 | return -EIO; | |
1248 | error = generic_file_open(inode, file); | |
f999a5bf CH |
1249 | if (error) |
1250 | return error; | |
1251 | ||
1252 | /* | |
1253 | * If there are any blocks, read-ahead block 0 as we're almost | |
1254 | * certain to have the next operation be a read there. | |
1255 | */ | |
309ecac8 | 1256 | mode = xfs_ilock_data_map_shared(ip); |
daf83964 | 1257 | if (ip->i_df.if_nextents > 0) |
06566fda | 1258 | error = xfs_dir3_data_readahead(ip, 0, 0); |
f999a5bf | 1259 | xfs_iunlock(ip, mode); |
7a652bbe | 1260 | return error; |
1da177e4 LT |
1261 | } |
1262 | ||
1da177e4 | 1263 | STATIC int |
3562fd45 | 1264 | xfs_file_release( |
1da177e4 LT |
1265 | struct inode *inode, |
1266 | struct file *filp) | |
1267 | { | |
2451337d | 1268 | return xfs_release(XFS_I(inode)); |
1da177e4 LT |
1269 | } |
1270 | ||
1da177e4 | 1271 | STATIC int |
3562fd45 | 1272 | xfs_file_readdir( |
b8227554 AV |
1273 | struct file *file, |
1274 | struct dir_context *ctx) | |
1da177e4 | 1275 | { |
b8227554 | 1276 | struct inode *inode = file_inode(file); |
739bfb2a | 1277 | xfs_inode_t *ip = XFS_I(inode); |
051e7cd4 CH |
1278 | size_t bufsize; |
1279 | ||
1280 | /* | |
1281 | * The Linux API doesn't pass down the total size of the buffer | |
1282 | * we read into down to the filesystem. With the filldir concept | |
1283 | * it's not needed for correct information, but the XFS dir2 leaf | |
1284 | * code wants an estimate of the buffer size to calculate it's | |
1285 | * readahead window and size the buffers used for mapping to | |
1286 | * physical blocks. | |
1287 | * | |
1288 | * Try to give it an estimate that's good enough, maybe at some | |
1289 | * point we can change the ->readdir prototype to include the | |
a9cc799e | 1290 | * buffer size. For now we use the current glibc buffer size. |
051e7cd4 | 1291 | */ |
13d2c10b | 1292 | bufsize = (size_t)min_t(loff_t, XFS_READDIR_BUFSIZE, ip->i_disk_size); |
051e7cd4 | 1293 | |
acb9553c | 1294 | return xfs_readdir(NULL, ip, ctx, bufsize); |
3fe3e6b1 JL |
1295 | } |
1296 | ||
1297 | STATIC loff_t | |
1298 | xfs_file_llseek( | |
1299 | struct file *file, | |
1300 | loff_t offset, | |
59f9c004 | 1301 | int whence) |
3fe3e6b1 | 1302 | { |
9b2970aa CH |
1303 | struct inode *inode = file->f_mapping->host; |
1304 | ||
75c8c50f | 1305 | if (xfs_is_shutdown(XFS_I(inode)->i_mount)) |
9b2970aa CH |
1306 | return -EIO; |
1307 | ||
59f9c004 | 1308 | switch (whence) { |
9b2970aa | 1309 | default: |
59f9c004 | 1310 | return generic_file_llseek(file, offset, whence); |
3fe3e6b1 | 1311 | case SEEK_HOLE: |
60271ab7 | 1312 | offset = iomap_seek_hole(inode, offset, &xfs_seek_iomap_ops); |
9b2970aa | 1313 | break; |
49c69591 | 1314 | case SEEK_DATA: |
60271ab7 | 1315 | offset = iomap_seek_data(inode, offset, &xfs_seek_iomap_ops); |
9b2970aa | 1316 | break; |
3fe3e6b1 | 1317 | } |
9b2970aa CH |
1318 | |
1319 | if (offset < 0) | |
1320 | return offset; | |
1321 | return vfs_setpos(file, offset, inode->i_sb->s_maxbytes); | |
3fe3e6b1 JL |
1322 | } |
1323 | ||
ea6c49b7 | 1324 | #ifdef CONFIG_FS_DAX |
47ba8cc7 | 1325 | static inline vm_fault_t |
ea6c49b7 SR |
1326 | xfs_dax_fault( |
1327 | struct vm_fault *vmf, | |
1d024e7a | 1328 | unsigned int order, |
ea6c49b7 SR |
1329 | bool write_fault, |
1330 | pfn_t *pfn) | |
1331 | { | |
1d024e7a | 1332 | return dax_iomap_fault(vmf, order, pfn, NULL, |
ea6c49b7 SR |
1333 | (write_fault && !vmf->cow_page) ? |
1334 | &xfs_dax_write_iomap_ops : | |
1335 | &xfs_read_iomap_ops); | |
1336 | } | |
1337 | #else | |
47ba8cc7 | 1338 | static inline vm_fault_t |
ea6c49b7 SR |
1339 | xfs_dax_fault( |
1340 | struct vm_fault *vmf, | |
1d024e7a | 1341 | unsigned int order, |
ea6c49b7 SR |
1342 | bool write_fault, |
1343 | pfn_t *pfn) | |
1344 | { | |
47ba8cc7 DW |
1345 | ASSERT(0); |
1346 | return VM_FAULT_SIGBUS; | |
ea6c49b7 SR |
1347 | } |
1348 | #endif | |
1349 | ||
de0e8c20 DC |
1350 | /* |
1351 | * Locking for serialisation of IO during page faults. This results in a lock | |
1352 | * ordering of: | |
1353 | * | |
c1e8d7c6 | 1354 | * mmap_lock (MM) |
6b698ede | 1355 | * sb_start_pagefault(vfs, freeze) |
2433480a | 1356 | * invalidate_lock (vfs/XFS_MMAPLOCK - truncate serialisation) |
6b698ede DC |
1357 | * page_lock (MM) |
1358 | * i_lock (XFS - extent map serialisation) | |
de0e8c20 | 1359 | */ |
05edd888 | 1360 | static vm_fault_t |
d522d569 CH |
1361 | __xfs_filemap_fault( |
1362 | struct vm_fault *vmf, | |
1d024e7a | 1363 | unsigned int order, |
d522d569 | 1364 | bool write_fault) |
de0e8c20 | 1365 | { |
11bac800 | 1366 | struct inode *inode = file_inode(vmf->vma->vm_file); |
d522d569 | 1367 | struct xfs_inode *ip = XFS_I(inode); |
05edd888 | 1368 | vm_fault_t ret; |
14a53798 | 1369 | unsigned int lock_mode = 0; |
de0e8c20 | 1370 | |
1d024e7a | 1371 | trace_xfs_filemap_fault(ip, order, write_fault); |
de0e8c20 | 1372 | |
d522d569 CH |
1373 | if (write_fault) { |
1374 | sb_start_pagefault(inode->i_sb); | |
1375 | file_update_time(vmf->vma->vm_file); | |
1376 | } | |
de0e8c20 | 1377 | |
14a53798 CH |
1378 | if (IS_DAX(inode) || write_fault) |
1379 | lock_mode = xfs_ilock_for_write_fault(XFS_I(inode)); | |
1380 | ||
6b698ede | 1381 | if (IS_DAX(inode)) { |
a39e596b CH |
1382 | pfn_t pfn; |
1383 | ||
1d024e7a | 1384 | ret = xfs_dax_fault(vmf, order, write_fault, &pfn); |
a39e596b | 1385 | if (ret & VM_FAULT_NEEDDSYNC) |
1d024e7a | 1386 | ret = dax_finish_sync_fault(vmf, order, pfn); |
14a53798 CH |
1387 | } else if (write_fault) { |
1388 | ret = iomap_page_mkwrite(vmf, &xfs_page_mkwrite_iomap_ops); | |
6b698ede | 1389 | } else { |
14a53798 | 1390 | ret = filemap_fault(vmf); |
6b698ede | 1391 | } |
6b698ede | 1392 | |
14a53798 CH |
1393 | if (lock_mode) |
1394 | xfs_iunlock(XFS_I(inode), lock_mode); | |
1395 | ||
d522d569 CH |
1396 | if (write_fault) |
1397 | sb_end_pagefault(inode->i_sb); | |
6b698ede | 1398 | return ret; |
de0e8c20 DC |
1399 | } |
1400 | ||
b17164e2 MP |
1401 | static inline bool |
1402 | xfs_is_write_fault( | |
1403 | struct vm_fault *vmf) | |
1404 | { | |
1405 | return (vmf->flags & FAULT_FLAG_WRITE) && | |
1406 | (vmf->vma->vm_flags & VM_SHARED); | |
1407 | } | |
1408 | ||
05edd888 | 1409 | static vm_fault_t |
6b698ede | 1410 | xfs_filemap_fault( |
075a924d DC |
1411 | struct vm_fault *vmf) |
1412 | { | |
6b698ede | 1413 | /* DAX can shortcut the normal fault path on write faults! */ |
1d024e7a | 1414 | return __xfs_filemap_fault(vmf, 0, |
d522d569 | 1415 | IS_DAX(file_inode(vmf->vma->vm_file)) && |
b17164e2 | 1416 | xfs_is_write_fault(vmf)); |
6b698ede DC |
1417 | } |
1418 | ||
05edd888 | 1419 | static vm_fault_t |
a2d58167 | 1420 | xfs_filemap_huge_fault( |
c791ace1 | 1421 | struct vm_fault *vmf, |
1d024e7a | 1422 | unsigned int order) |
acd76e74 | 1423 | { |
d522d569 | 1424 | if (!IS_DAX(file_inode(vmf->vma->vm_file))) |
acd76e74 MW |
1425 | return VM_FAULT_FALLBACK; |
1426 | ||
d522d569 | 1427 | /* DAX can shortcut the normal fault path on write faults! */ |
1d024e7a | 1428 | return __xfs_filemap_fault(vmf, order, |
b17164e2 | 1429 | xfs_is_write_fault(vmf)); |
d522d569 | 1430 | } |
acd76e74 | 1431 | |
05edd888 | 1432 | static vm_fault_t |
d522d569 CH |
1433 | xfs_filemap_page_mkwrite( |
1434 | struct vm_fault *vmf) | |
1435 | { | |
1d024e7a | 1436 | return __xfs_filemap_fault(vmf, 0, true); |
acd76e74 MW |
1437 | } |
1438 | ||
3af49285 | 1439 | /* |
7b565c9f JK |
1440 | * pfn_mkwrite was originally intended to ensure we capture time stamp updates |
1441 | * on write faults. In reality, it needs to serialise against truncate and | |
1442 | * prepare memory for writing so handle is as standard write fault. | |
3af49285 | 1443 | */ |
05edd888 | 1444 | static vm_fault_t |
3af49285 | 1445 | xfs_filemap_pfn_mkwrite( |
3af49285 DC |
1446 | struct vm_fault *vmf) |
1447 | { | |
1448 | ||
1d024e7a | 1449 | return __xfs_filemap_fault(vmf, 0, true); |
acd76e74 MW |
1450 | } |
1451 | ||
6b698ede DC |
1452 | static const struct vm_operations_struct xfs_file_vm_ops = { |
1453 | .fault = xfs_filemap_fault, | |
a2d58167 | 1454 | .huge_fault = xfs_filemap_huge_fault, |
945ea457 | 1455 | .map_pages = filemap_map_pages, |
6b698ede | 1456 | .page_mkwrite = xfs_filemap_page_mkwrite, |
3af49285 | 1457 | .pfn_mkwrite = xfs_filemap_pfn_mkwrite, |
6b698ede DC |
1458 | }; |
1459 | ||
1460 | STATIC int | |
1461 | xfs_file_mmap( | |
30fa529e CH |
1462 | struct file *file, |
1463 | struct vm_area_struct *vma) | |
6b698ede | 1464 | { |
30fa529e CH |
1465 | struct inode *inode = file_inode(file); |
1466 | struct xfs_buftarg *target = xfs_inode_buftarg(XFS_I(inode)); | |
b21fec41 | 1467 | |
a39e596b | 1468 | /* |
b21fec41 PG |
1469 | * We don't support synchronous mappings for non-DAX files and |
1470 | * for DAX files if underneath dax_device is not synchronous. | |
a39e596b | 1471 | */ |
30fa529e | 1472 | if (!daxdev_mapping_supported(vma, target->bt_daxdev)) |
a39e596b CH |
1473 | return -EOPNOTSUPP; |
1474 | ||
30fa529e | 1475 | file_accessed(file); |
6b698ede | 1476 | vma->vm_ops = &xfs_file_vm_ops; |
30fa529e | 1477 | if (IS_DAX(inode)) |
1c71222e | 1478 | vm_flags_set(vma, VM_HUGEPAGE); |
6b698ede | 1479 | return 0; |
075a924d DC |
1480 | } |
1481 | ||
4b6f5d20 | 1482 | const struct file_operations xfs_file_operations = { |
3fe3e6b1 | 1483 | .llseek = xfs_file_llseek, |
b4f5d2c6 | 1484 | .read_iter = xfs_file_read_iter, |
bf97f3bc | 1485 | .write_iter = xfs_file_write_iter, |
54919f94 | 1486 | .splice_read = xfs_file_splice_read, |
8d020765 | 1487 | .splice_write = iter_file_splice_write, |
3e08773c | 1488 | .iopoll = iocb_bio_iopoll, |
3562fd45 | 1489 | .unlocked_ioctl = xfs_file_ioctl, |
1da177e4 | 1490 | #ifdef CONFIG_COMPAT |
3562fd45 | 1491 | .compat_ioctl = xfs_file_compat_ioctl, |
1da177e4 | 1492 | #endif |
3562fd45 NS |
1493 | .mmap = xfs_file_mmap, |
1494 | .open = xfs_file_open, | |
1495 | .release = xfs_file_release, | |
1496 | .fsync = xfs_file_fsync, | |
dbe6ec81 | 1497 | .get_unmapped_area = thp_get_unmapped_area, |
2fe17c10 | 1498 | .fallocate = xfs_file_fallocate, |
40144e49 | 1499 | .fadvise = xfs_file_fadvise, |
2e5dfc99 | 1500 | .remap_file_range = xfs_file_remap_range, |
19e04864 CH |
1501 | .fop_flags = FOP_MMAP_SYNC | FOP_BUFFER_RASYNC | |
1502 | FOP_BUFFER_WASYNC | FOP_DIO_PARALLEL_WRITE, | |
1da177e4 LT |
1503 | }; |
1504 | ||
4b6f5d20 | 1505 | const struct file_operations xfs_dir_file_operations = { |
f999a5bf | 1506 | .open = xfs_dir_open, |
1da177e4 | 1507 | .read = generic_read_dir, |
3b0a3c1a | 1508 | .iterate_shared = xfs_file_readdir, |
59af1584 | 1509 | .llseek = generic_file_llseek, |
3562fd45 | 1510 | .unlocked_ioctl = xfs_file_ioctl, |
d3870398 | 1511 | #ifdef CONFIG_COMPAT |
3562fd45 | 1512 | .compat_ioctl = xfs_file_compat_ioctl, |
d3870398 | 1513 | #endif |
1da2f2db | 1514 | .fsync = xfs_dir_fsync, |
1da177e4 | 1515 | }; |