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Commit | Line | Data |
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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" |
a844f451 | 19 | #include "xfs_bit.h" |
1da177e4 | 20 | #include "xfs_log.h" |
a844f451 | 21 | #include "xfs_inum.h" |
1da177e4 | 22 | #include "xfs_sb.h" |
a844f451 | 23 | #include "xfs_ag.h" |
1da177e4 LT |
24 | #include "xfs_dir2.h" |
25 | #include "xfs_trans.h" | |
26 | #include "xfs_dmapi.h" | |
27 | #include "xfs_mount.h" | |
28 | #include "xfs_bmap_btree.h" | |
29 | #include "xfs_alloc_btree.h" | |
30 | #include "xfs_ialloc_btree.h" | |
1da177e4 | 31 | #include "xfs_dir2_sf.h" |
a844f451 | 32 | #include "xfs_attr_sf.h" |
1da177e4 LT |
33 | #include "xfs_dinode.h" |
34 | #include "xfs_inode.h" | |
a844f451 NS |
35 | #include "xfs_alloc.h" |
36 | #include "xfs_btree.h" | |
1da177e4 LT |
37 | #include "xfs_error.h" |
38 | #include "xfs_rw.h" | |
39 | #include "xfs_iomap.h" | |
739bfb2a | 40 | #include "xfs_vnodeops.h" |
0b1b213f | 41 | #include "xfs_trace.h" |
1da177e4 | 42 | #include <linux/mpage.h> |
10ce4444 | 43 | #include <linux/pagevec.h> |
1da177e4 LT |
44 | #include <linux/writeback.h> |
45 | ||
25e41b3d CH |
46 | |
47 | /* | |
48 | * Prime number of hash buckets since address is used as the key. | |
49 | */ | |
50 | #define NVSYNC 37 | |
51 | #define to_ioend_wq(v) (&xfs_ioend_wq[((unsigned long)v) % NVSYNC]) | |
52 | static wait_queue_head_t xfs_ioend_wq[NVSYNC]; | |
53 | ||
54 | void __init | |
55 | xfs_ioend_init(void) | |
56 | { | |
57 | int i; | |
58 | ||
59 | for (i = 0; i < NVSYNC; i++) | |
60 | init_waitqueue_head(&xfs_ioend_wq[i]); | |
61 | } | |
62 | ||
63 | void | |
64 | xfs_ioend_wait( | |
65 | xfs_inode_t *ip) | |
66 | { | |
67 | wait_queue_head_t *wq = to_ioend_wq(ip); | |
68 | ||
69 | wait_event(*wq, (atomic_read(&ip->i_iocount) == 0)); | |
70 | } | |
71 | ||
72 | STATIC void | |
73 | xfs_ioend_wake( | |
74 | xfs_inode_t *ip) | |
75 | { | |
76 | if (atomic_dec_and_test(&ip->i_iocount)) | |
77 | wake_up(to_ioend_wq(ip)); | |
78 | } | |
79 | ||
0b1b213f | 80 | void |
f51623b2 NS |
81 | xfs_count_page_state( |
82 | struct page *page, | |
83 | int *delalloc, | |
84 | int *unmapped, | |
85 | int *unwritten) | |
86 | { | |
87 | struct buffer_head *bh, *head; | |
88 | ||
89 | *delalloc = *unmapped = *unwritten = 0; | |
90 | ||
91 | bh = head = page_buffers(page); | |
92 | do { | |
93 | if (buffer_uptodate(bh) && !buffer_mapped(bh)) | |
94 | (*unmapped) = 1; | |
f51623b2 NS |
95 | else if (buffer_unwritten(bh)) |
96 | (*unwritten) = 1; | |
97 | else if (buffer_delay(bh)) | |
98 | (*delalloc) = 1; | |
99 | } while ((bh = bh->b_this_page) != head); | |
100 | } | |
101 | ||
6214ed44 CH |
102 | STATIC struct block_device * |
103 | xfs_find_bdev_for_inode( | |
104 | struct xfs_inode *ip) | |
105 | { | |
106 | struct xfs_mount *mp = ip->i_mount; | |
107 | ||
71ddabb9 | 108 | if (XFS_IS_REALTIME_INODE(ip)) |
6214ed44 CH |
109 | return mp->m_rtdev_targp->bt_bdev; |
110 | else | |
111 | return mp->m_ddev_targp->bt_bdev; | |
112 | } | |
113 | ||
f6d6d4fc CH |
114 | /* |
115 | * We're now finished for good with this ioend structure. | |
116 | * Update the page state via the associated buffer_heads, | |
117 | * release holds on the inode and bio, and finally free | |
118 | * up memory. Do not use the ioend after this. | |
119 | */ | |
0829c360 CH |
120 | STATIC void |
121 | xfs_destroy_ioend( | |
122 | xfs_ioend_t *ioend) | |
123 | { | |
f6d6d4fc | 124 | struct buffer_head *bh, *next; |
583fa586 | 125 | struct xfs_inode *ip = XFS_I(ioend->io_inode); |
f6d6d4fc CH |
126 | |
127 | for (bh = ioend->io_buffer_head; bh; bh = next) { | |
128 | next = bh->b_private; | |
7d04a335 | 129 | bh->b_end_io(bh, !ioend->io_error); |
f6d6d4fc | 130 | } |
583fa586 CH |
131 | |
132 | /* | |
133 | * Volume managers supporting multiple paths can send back ENODEV | |
134 | * when the final path disappears. In this case continuing to fill | |
135 | * the page cache with dirty data which cannot be written out is | |
136 | * evil, so prevent that. | |
137 | */ | |
138 | if (unlikely(ioend->io_error == -ENODEV)) { | |
139 | xfs_do_force_shutdown(ip->i_mount, SHUTDOWN_DEVICE_REQ, | |
140 | __FILE__, __LINE__); | |
b677c210 | 141 | } |
583fa586 | 142 | |
25e41b3d | 143 | xfs_ioend_wake(ip); |
0829c360 CH |
144 | mempool_free(ioend, xfs_ioend_pool); |
145 | } | |
146 | ||
932640e8 DC |
147 | /* |
148 | * If the end of the current ioend is beyond the current EOF, | |
149 | * return the new EOF value, otherwise zero. | |
150 | */ | |
151 | STATIC xfs_fsize_t | |
152 | xfs_ioend_new_eof( | |
153 | xfs_ioend_t *ioend) | |
154 | { | |
155 | xfs_inode_t *ip = XFS_I(ioend->io_inode); | |
156 | xfs_fsize_t isize; | |
157 | xfs_fsize_t bsize; | |
158 | ||
159 | bsize = ioend->io_offset + ioend->io_size; | |
160 | isize = MAX(ip->i_size, ip->i_new_size); | |
161 | isize = MIN(isize, bsize); | |
162 | return isize > ip->i_d.di_size ? isize : 0; | |
163 | } | |
164 | ||
ba87ea69 LM |
165 | /* |
166 | * Update on-disk file size now that data has been written to disk. | |
167 | * The current in-memory file size is i_size. If a write is beyond | |
613d7043 | 168 | * eof i_new_size will be the intended file size until i_size is |
ba87ea69 LM |
169 | * updated. If this write does not extend all the way to the valid |
170 | * file size then restrict this update to the end of the write. | |
171 | */ | |
932640e8 | 172 | |
ba87ea69 LM |
173 | STATIC void |
174 | xfs_setfilesize( | |
175 | xfs_ioend_t *ioend) | |
176 | { | |
b677c210 | 177 | xfs_inode_t *ip = XFS_I(ioend->io_inode); |
ba87ea69 | 178 | xfs_fsize_t isize; |
ba87ea69 | 179 | |
ba87ea69 LM |
180 | ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFREG); |
181 | ASSERT(ioend->io_type != IOMAP_READ); | |
182 | ||
183 | if (unlikely(ioend->io_error)) | |
184 | return; | |
185 | ||
ba87ea69 | 186 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
932640e8 DC |
187 | isize = xfs_ioend_new_eof(ioend); |
188 | if (isize) { | |
ba87ea69 | 189 | ip->i_d.di_size = isize; |
66d834ea | 190 | xfs_mark_inode_dirty(ip); |
ba87ea69 LM |
191 | } |
192 | ||
193 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
194 | } | |
195 | ||
0829c360 | 196 | /* |
5ec4fabb | 197 | * IO write completion. |
f6d6d4fc CH |
198 | */ |
199 | STATIC void | |
5ec4fabb | 200 | xfs_end_io( |
c4028958 | 201 | struct work_struct *work) |
0829c360 | 202 | { |
c4028958 DH |
203 | xfs_ioend_t *ioend = |
204 | container_of(work, xfs_ioend_t, io_work); | |
7642861b | 205 | struct xfs_inode *ip = XFS_I(ioend->io_inode); |
ba87ea69 | 206 | |
5ec4fabb CH |
207 | /* |
208 | * For unwritten extents we need to issue transactions to convert a | |
209 | * range to normal written extens after the data I/O has finished. | |
210 | */ | |
211 | if (ioend->io_type == IOMAP_UNWRITTEN && | |
212 | likely(!ioend->io_error && !XFS_FORCED_SHUTDOWN(ip->i_mount))) { | |
213 | int error; | |
214 | ||
215 | error = xfs_iomap_write_unwritten(ip, ioend->io_offset, | |
216 | ioend->io_size); | |
217 | if (error) | |
218 | ioend->io_error = error; | |
219 | } | |
ba87ea69 | 220 | |
5ec4fabb CH |
221 | /* |
222 | * We might have to update the on-disk file size after extending | |
223 | * writes. | |
224 | */ | |
225 | if (ioend->io_type != IOMAP_READ) | |
226 | xfs_setfilesize(ioend); | |
0829c360 CH |
227 | xfs_destroy_ioend(ioend); |
228 | } | |
229 | ||
c626d174 DC |
230 | /* |
231 | * Schedule IO completion handling on a xfsdatad if this was | |
232 | * the final hold on this ioend. If we are asked to wait, | |
233 | * flush the workqueue. | |
234 | */ | |
235 | STATIC void | |
236 | xfs_finish_ioend( | |
237 | xfs_ioend_t *ioend, | |
238 | int wait) | |
239 | { | |
240 | if (atomic_dec_and_test(&ioend->io_remaining)) { | |
5ec4fabb | 241 | struct workqueue_struct *wq; |
c626d174 | 242 | |
5ec4fabb CH |
243 | wq = (ioend->io_type == IOMAP_UNWRITTEN) ? |
244 | xfsconvertd_workqueue : xfsdatad_workqueue; | |
c626d174 DC |
245 | queue_work(wq, &ioend->io_work); |
246 | if (wait) | |
247 | flush_workqueue(wq); | |
248 | } | |
249 | } | |
250 | ||
0829c360 CH |
251 | /* |
252 | * Allocate and initialise an IO completion structure. | |
253 | * We need to track unwritten extent write completion here initially. | |
254 | * We'll need to extend this for updating the ondisk inode size later | |
255 | * (vs. incore size). | |
256 | */ | |
257 | STATIC xfs_ioend_t * | |
258 | xfs_alloc_ioend( | |
f6d6d4fc CH |
259 | struct inode *inode, |
260 | unsigned int type) | |
0829c360 CH |
261 | { |
262 | xfs_ioend_t *ioend; | |
263 | ||
264 | ioend = mempool_alloc(xfs_ioend_pool, GFP_NOFS); | |
265 | ||
266 | /* | |
267 | * Set the count to 1 initially, which will prevent an I/O | |
268 | * completion callback from happening before we have started | |
269 | * all the I/O from calling the completion routine too early. | |
270 | */ | |
271 | atomic_set(&ioend->io_remaining, 1); | |
7d04a335 | 272 | ioend->io_error = 0; |
f6d6d4fc CH |
273 | ioend->io_list = NULL; |
274 | ioend->io_type = type; | |
b677c210 | 275 | ioend->io_inode = inode; |
c1a073bd | 276 | ioend->io_buffer_head = NULL; |
f6d6d4fc | 277 | ioend->io_buffer_tail = NULL; |
b677c210 | 278 | atomic_inc(&XFS_I(ioend->io_inode)->i_iocount); |
0829c360 CH |
279 | ioend->io_offset = 0; |
280 | ioend->io_size = 0; | |
281 | ||
5ec4fabb | 282 | INIT_WORK(&ioend->io_work, xfs_end_io); |
0829c360 CH |
283 | return ioend; |
284 | } | |
285 | ||
1da177e4 LT |
286 | STATIC int |
287 | xfs_map_blocks( | |
288 | struct inode *inode, | |
289 | loff_t offset, | |
290 | ssize_t count, | |
291 | xfs_iomap_t *mapp, | |
292 | int flags) | |
293 | { | |
6bd16ff2 CH |
294 | int nmaps = 1; |
295 | ||
296 | return -xfs_iomap(XFS_I(inode), offset, count, flags, mapp, &nmaps); | |
1da177e4 LT |
297 | } |
298 | ||
b8f82a4a | 299 | STATIC int |
1defeac9 | 300 | xfs_iomap_valid( |
1da177e4 | 301 | xfs_iomap_t *iomapp, |
1defeac9 | 302 | loff_t offset) |
1da177e4 | 303 | { |
1defeac9 CH |
304 | return offset >= iomapp->iomap_offset && |
305 | offset < iomapp->iomap_offset + iomapp->iomap_bsize; | |
1da177e4 LT |
306 | } |
307 | ||
f6d6d4fc CH |
308 | /* |
309 | * BIO completion handler for buffered IO. | |
310 | */ | |
782e3b3b | 311 | STATIC void |
f6d6d4fc CH |
312 | xfs_end_bio( |
313 | struct bio *bio, | |
f6d6d4fc CH |
314 | int error) |
315 | { | |
316 | xfs_ioend_t *ioend = bio->bi_private; | |
317 | ||
f6d6d4fc | 318 | ASSERT(atomic_read(&bio->bi_cnt) >= 1); |
7d04a335 | 319 | ioend->io_error = test_bit(BIO_UPTODATE, &bio->bi_flags) ? 0 : error; |
f6d6d4fc CH |
320 | |
321 | /* Toss bio and pass work off to an xfsdatad thread */ | |
f6d6d4fc CH |
322 | bio->bi_private = NULL; |
323 | bio->bi_end_io = NULL; | |
f6d6d4fc | 324 | bio_put(bio); |
7d04a335 | 325 | |
e927af90 | 326 | xfs_finish_ioend(ioend, 0); |
f6d6d4fc CH |
327 | } |
328 | ||
329 | STATIC void | |
330 | xfs_submit_ioend_bio( | |
06342cf8 CH |
331 | struct writeback_control *wbc, |
332 | xfs_ioend_t *ioend, | |
333 | struct bio *bio) | |
f6d6d4fc CH |
334 | { |
335 | atomic_inc(&ioend->io_remaining); | |
f6d6d4fc CH |
336 | bio->bi_private = ioend; |
337 | bio->bi_end_io = xfs_end_bio; | |
338 | ||
932640e8 DC |
339 | /* |
340 | * If the I/O is beyond EOF we mark the inode dirty immediately | |
341 | * but don't update the inode size until I/O completion. | |
342 | */ | |
343 | if (xfs_ioend_new_eof(ioend)) | |
66d834ea | 344 | xfs_mark_inode_dirty(XFS_I(ioend->io_inode)); |
932640e8 | 345 | |
06342cf8 CH |
346 | submit_bio(wbc->sync_mode == WB_SYNC_ALL ? |
347 | WRITE_SYNC_PLUG : WRITE, bio); | |
f6d6d4fc CH |
348 | ASSERT(!bio_flagged(bio, BIO_EOPNOTSUPP)); |
349 | bio_put(bio); | |
350 | } | |
351 | ||
352 | STATIC struct bio * | |
353 | xfs_alloc_ioend_bio( | |
354 | struct buffer_head *bh) | |
355 | { | |
356 | struct bio *bio; | |
357 | int nvecs = bio_get_nr_vecs(bh->b_bdev); | |
358 | ||
359 | do { | |
360 | bio = bio_alloc(GFP_NOIO, nvecs); | |
361 | nvecs >>= 1; | |
362 | } while (!bio); | |
363 | ||
364 | ASSERT(bio->bi_private == NULL); | |
365 | bio->bi_sector = bh->b_blocknr * (bh->b_size >> 9); | |
366 | bio->bi_bdev = bh->b_bdev; | |
367 | bio_get(bio); | |
368 | return bio; | |
369 | } | |
370 | ||
371 | STATIC void | |
372 | xfs_start_buffer_writeback( | |
373 | struct buffer_head *bh) | |
374 | { | |
375 | ASSERT(buffer_mapped(bh)); | |
376 | ASSERT(buffer_locked(bh)); | |
377 | ASSERT(!buffer_delay(bh)); | |
378 | ASSERT(!buffer_unwritten(bh)); | |
379 | ||
380 | mark_buffer_async_write(bh); | |
381 | set_buffer_uptodate(bh); | |
382 | clear_buffer_dirty(bh); | |
383 | } | |
384 | ||
385 | STATIC void | |
386 | xfs_start_page_writeback( | |
387 | struct page *page, | |
f6d6d4fc CH |
388 | int clear_dirty, |
389 | int buffers) | |
390 | { | |
391 | ASSERT(PageLocked(page)); | |
392 | ASSERT(!PageWriteback(page)); | |
f6d6d4fc | 393 | if (clear_dirty) |
92132021 DC |
394 | clear_page_dirty_for_io(page); |
395 | set_page_writeback(page); | |
f6d6d4fc | 396 | unlock_page(page); |
1f7decf6 FW |
397 | /* If no buffers on the page are to be written, finish it here */ |
398 | if (!buffers) | |
f6d6d4fc | 399 | end_page_writeback(page); |
f6d6d4fc CH |
400 | } |
401 | ||
402 | static inline int bio_add_buffer(struct bio *bio, struct buffer_head *bh) | |
403 | { | |
404 | return bio_add_page(bio, bh->b_page, bh->b_size, bh_offset(bh)); | |
405 | } | |
406 | ||
407 | /* | |
d88992f6 DC |
408 | * Submit all of the bios for all of the ioends we have saved up, covering the |
409 | * initial writepage page and also any probed pages. | |
410 | * | |
411 | * Because we may have multiple ioends spanning a page, we need to start | |
412 | * writeback on all the buffers before we submit them for I/O. If we mark the | |
413 | * buffers as we got, then we can end up with a page that only has buffers | |
414 | * marked async write and I/O complete on can occur before we mark the other | |
415 | * buffers async write. | |
416 | * | |
417 | * The end result of this is that we trip a bug in end_page_writeback() because | |
418 | * we call it twice for the one page as the code in end_buffer_async_write() | |
419 | * assumes that all buffers on the page are started at the same time. | |
420 | * | |
421 | * The fix is two passes across the ioend list - one to start writeback on the | |
c41564b5 | 422 | * buffer_heads, and then submit them for I/O on the second pass. |
f6d6d4fc CH |
423 | */ |
424 | STATIC void | |
425 | xfs_submit_ioend( | |
06342cf8 | 426 | struct writeback_control *wbc, |
f6d6d4fc CH |
427 | xfs_ioend_t *ioend) |
428 | { | |
d88992f6 | 429 | xfs_ioend_t *head = ioend; |
f6d6d4fc CH |
430 | xfs_ioend_t *next; |
431 | struct buffer_head *bh; | |
432 | struct bio *bio; | |
433 | sector_t lastblock = 0; | |
434 | ||
d88992f6 DC |
435 | /* Pass 1 - start writeback */ |
436 | do { | |
437 | next = ioend->io_list; | |
438 | for (bh = ioend->io_buffer_head; bh; bh = bh->b_private) { | |
439 | xfs_start_buffer_writeback(bh); | |
440 | } | |
441 | } while ((ioend = next) != NULL); | |
442 | ||
443 | /* Pass 2 - submit I/O */ | |
444 | ioend = head; | |
f6d6d4fc CH |
445 | do { |
446 | next = ioend->io_list; | |
447 | bio = NULL; | |
448 | ||
449 | for (bh = ioend->io_buffer_head; bh; bh = bh->b_private) { | |
f6d6d4fc CH |
450 | |
451 | if (!bio) { | |
452 | retry: | |
453 | bio = xfs_alloc_ioend_bio(bh); | |
454 | } else if (bh->b_blocknr != lastblock + 1) { | |
06342cf8 | 455 | xfs_submit_ioend_bio(wbc, ioend, bio); |
f6d6d4fc CH |
456 | goto retry; |
457 | } | |
458 | ||
459 | if (bio_add_buffer(bio, bh) != bh->b_size) { | |
06342cf8 | 460 | xfs_submit_ioend_bio(wbc, ioend, bio); |
f6d6d4fc CH |
461 | goto retry; |
462 | } | |
463 | ||
464 | lastblock = bh->b_blocknr; | |
465 | } | |
466 | if (bio) | |
06342cf8 | 467 | xfs_submit_ioend_bio(wbc, ioend, bio); |
e927af90 | 468 | xfs_finish_ioend(ioend, 0); |
f6d6d4fc CH |
469 | } while ((ioend = next) != NULL); |
470 | } | |
471 | ||
472 | /* | |
473 | * Cancel submission of all buffer_heads so far in this endio. | |
474 | * Toss the endio too. Only ever called for the initial page | |
475 | * in a writepage request, so only ever one page. | |
476 | */ | |
477 | STATIC void | |
478 | xfs_cancel_ioend( | |
479 | xfs_ioend_t *ioend) | |
480 | { | |
481 | xfs_ioend_t *next; | |
482 | struct buffer_head *bh, *next_bh; | |
483 | ||
484 | do { | |
485 | next = ioend->io_list; | |
486 | bh = ioend->io_buffer_head; | |
487 | do { | |
488 | next_bh = bh->b_private; | |
489 | clear_buffer_async_write(bh); | |
490 | unlock_buffer(bh); | |
491 | } while ((bh = next_bh) != NULL); | |
492 | ||
25e41b3d | 493 | xfs_ioend_wake(XFS_I(ioend->io_inode)); |
f6d6d4fc CH |
494 | mempool_free(ioend, xfs_ioend_pool); |
495 | } while ((ioend = next) != NULL); | |
496 | } | |
497 | ||
498 | /* | |
499 | * Test to see if we've been building up a completion structure for | |
500 | * earlier buffers -- if so, we try to append to this ioend if we | |
501 | * can, otherwise we finish off any current ioend and start another. | |
502 | * Return true if we've finished the given ioend. | |
503 | */ | |
504 | STATIC void | |
505 | xfs_add_to_ioend( | |
506 | struct inode *inode, | |
507 | struct buffer_head *bh, | |
7336cea8 | 508 | xfs_off_t offset, |
f6d6d4fc CH |
509 | unsigned int type, |
510 | xfs_ioend_t **result, | |
511 | int need_ioend) | |
512 | { | |
513 | xfs_ioend_t *ioend = *result; | |
514 | ||
515 | if (!ioend || need_ioend || type != ioend->io_type) { | |
516 | xfs_ioend_t *previous = *result; | |
f6d6d4fc | 517 | |
f6d6d4fc CH |
518 | ioend = xfs_alloc_ioend(inode, type); |
519 | ioend->io_offset = offset; | |
520 | ioend->io_buffer_head = bh; | |
521 | ioend->io_buffer_tail = bh; | |
522 | if (previous) | |
523 | previous->io_list = ioend; | |
524 | *result = ioend; | |
525 | } else { | |
526 | ioend->io_buffer_tail->b_private = bh; | |
527 | ioend->io_buffer_tail = bh; | |
528 | } | |
529 | ||
530 | bh->b_private = NULL; | |
531 | ioend->io_size += bh->b_size; | |
532 | } | |
533 | ||
87cbc49c NS |
534 | STATIC void |
535 | xfs_map_buffer( | |
536 | struct buffer_head *bh, | |
537 | xfs_iomap_t *mp, | |
538 | xfs_off_t offset, | |
539 | uint block_bits) | |
540 | { | |
541 | sector_t bn; | |
542 | ||
543 | ASSERT(mp->iomap_bn != IOMAP_DADDR_NULL); | |
544 | ||
545 | bn = (mp->iomap_bn >> (block_bits - BBSHIFT)) + | |
546 | ((offset - mp->iomap_offset) >> block_bits); | |
547 | ||
548 | ASSERT(bn || (mp->iomap_flags & IOMAP_REALTIME)); | |
549 | ||
550 | bh->b_blocknr = bn; | |
551 | set_buffer_mapped(bh); | |
552 | } | |
553 | ||
1da177e4 LT |
554 | STATIC void |
555 | xfs_map_at_offset( | |
1da177e4 | 556 | struct buffer_head *bh, |
1defeac9 | 557 | loff_t offset, |
1da177e4 | 558 | int block_bits, |
1defeac9 | 559 | xfs_iomap_t *iomapp) |
1da177e4 | 560 | { |
1da177e4 LT |
561 | ASSERT(!(iomapp->iomap_flags & IOMAP_HOLE)); |
562 | ASSERT(!(iomapp->iomap_flags & IOMAP_DELAY)); | |
1da177e4 LT |
563 | |
564 | lock_buffer(bh); | |
87cbc49c | 565 | xfs_map_buffer(bh, iomapp, offset, block_bits); |
ce8e922c | 566 | bh->b_bdev = iomapp->iomap_target->bt_bdev; |
1da177e4 LT |
567 | set_buffer_mapped(bh); |
568 | clear_buffer_delay(bh); | |
f6d6d4fc | 569 | clear_buffer_unwritten(bh); |
1da177e4 LT |
570 | } |
571 | ||
572 | /* | |
6c4fe19f | 573 | * Look for a page at index that is suitable for clustering. |
1da177e4 LT |
574 | */ |
575 | STATIC unsigned int | |
6c4fe19f | 576 | xfs_probe_page( |
10ce4444 | 577 | struct page *page, |
6c4fe19f CH |
578 | unsigned int pg_offset, |
579 | int mapped) | |
1da177e4 | 580 | { |
1da177e4 LT |
581 | int ret = 0; |
582 | ||
1da177e4 | 583 | if (PageWriteback(page)) |
10ce4444 | 584 | return 0; |
1da177e4 LT |
585 | |
586 | if (page->mapping && PageDirty(page)) { | |
587 | if (page_has_buffers(page)) { | |
588 | struct buffer_head *bh, *head; | |
589 | ||
590 | bh = head = page_buffers(page); | |
591 | do { | |
6c4fe19f CH |
592 | if (!buffer_uptodate(bh)) |
593 | break; | |
594 | if (mapped != buffer_mapped(bh)) | |
1da177e4 LT |
595 | break; |
596 | ret += bh->b_size; | |
597 | if (ret >= pg_offset) | |
598 | break; | |
599 | } while ((bh = bh->b_this_page) != head); | |
600 | } else | |
6c4fe19f | 601 | ret = mapped ? 0 : PAGE_CACHE_SIZE; |
1da177e4 LT |
602 | } |
603 | ||
1da177e4 LT |
604 | return ret; |
605 | } | |
606 | ||
f6d6d4fc | 607 | STATIC size_t |
6c4fe19f | 608 | xfs_probe_cluster( |
1da177e4 LT |
609 | struct inode *inode, |
610 | struct page *startpage, | |
611 | struct buffer_head *bh, | |
6c4fe19f CH |
612 | struct buffer_head *head, |
613 | int mapped) | |
1da177e4 | 614 | { |
10ce4444 | 615 | struct pagevec pvec; |
1da177e4 | 616 | pgoff_t tindex, tlast, tloff; |
10ce4444 CH |
617 | size_t total = 0; |
618 | int done = 0, i; | |
1da177e4 LT |
619 | |
620 | /* First sum forwards in this page */ | |
621 | do { | |
2353e8e9 | 622 | if (!buffer_uptodate(bh) || (mapped != buffer_mapped(bh))) |
10ce4444 | 623 | return total; |
1da177e4 LT |
624 | total += bh->b_size; |
625 | } while ((bh = bh->b_this_page) != head); | |
626 | ||
10ce4444 CH |
627 | /* if we reached the end of the page, sum forwards in following pages */ |
628 | tlast = i_size_read(inode) >> PAGE_CACHE_SHIFT; | |
629 | tindex = startpage->index + 1; | |
630 | ||
631 | /* Prune this back to avoid pathological behavior */ | |
632 | tloff = min(tlast, startpage->index + 64); | |
633 | ||
634 | pagevec_init(&pvec, 0); | |
635 | while (!done && tindex <= tloff) { | |
636 | unsigned len = min_t(pgoff_t, PAGEVEC_SIZE, tlast - tindex + 1); | |
637 | ||
638 | if (!pagevec_lookup(&pvec, inode->i_mapping, tindex, len)) | |
639 | break; | |
640 | ||
641 | for (i = 0; i < pagevec_count(&pvec); i++) { | |
642 | struct page *page = pvec.pages[i]; | |
265c1fac | 643 | size_t pg_offset, pg_len = 0; |
10ce4444 CH |
644 | |
645 | if (tindex == tlast) { | |
646 | pg_offset = | |
647 | i_size_read(inode) & (PAGE_CACHE_SIZE - 1); | |
1defeac9 CH |
648 | if (!pg_offset) { |
649 | done = 1; | |
10ce4444 | 650 | break; |
1defeac9 | 651 | } |
10ce4444 CH |
652 | } else |
653 | pg_offset = PAGE_CACHE_SIZE; | |
654 | ||
529ae9aa | 655 | if (page->index == tindex && trylock_page(page)) { |
265c1fac | 656 | pg_len = xfs_probe_page(page, pg_offset, mapped); |
10ce4444 CH |
657 | unlock_page(page); |
658 | } | |
659 | ||
265c1fac | 660 | if (!pg_len) { |
10ce4444 CH |
661 | done = 1; |
662 | break; | |
663 | } | |
664 | ||
265c1fac | 665 | total += pg_len; |
1defeac9 | 666 | tindex++; |
1da177e4 | 667 | } |
10ce4444 CH |
668 | |
669 | pagevec_release(&pvec); | |
670 | cond_resched(); | |
1da177e4 | 671 | } |
10ce4444 | 672 | |
1da177e4 LT |
673 | return total; |
674 | } | |
675 | ||
676 | /* | |
10ce4444 CH |
677 | * Test if a given page is suitable for writing as part of an unwritten |
678 | * or delayed allocate extent. | |
1da177e4 | 679 | */ |
10ce4444 CH |
680 | STATIC int |
681 | xfs_is_delayed_page( | |
682 | struct page *page, | |
f6d6d4fc | 683 | unsigned int type) |
1da177e4 | 684 | { |
1da177e4 | 685 | if (PageWriteback(page)) |
10ce4444 | 686 | return 0; |
1da177e4 LT |
687 | |
688 | if (page->mapping && page_has_buffers(page)) { | |
689 | struct buffer_head *bh, *head; | |
690 | int acceptable = 0; | |
691 | ||
692 | bh = head = page_buffers(page); | |
693 | do { | |
f6d6d4fc CH |
694 | if (buffer_unwritten(bh)) |
695 | acceptable = (type == IOMAP_UNWRITTEN); | |
696 | else if (buffer_delay(bh)) | |
697 | acceptable = (type == IOMAP_DELAY); | |
2ddee844 | 698 | else if (buffer_dirty(bh) && buffer_mapped(bh)) |
df3c7244 | 699 | acceptable = (type == IOMAP_NEW); |
f6d6d4fc | 700 | else |
1da177e4 | 701 | break; |
1da177e4 LT |
702 | } while ((bh = bh->b_this_page) != head); |
703 | ||
704 | if (acceptable) | |
10ce4444 | 705 | return 1; |
1da177e4 LT |
706 | } |
707 | ||
10ce4444 | 708 | return 0; |
1da177e4 LT |
709 | } |
710 | ||
1da177e4 LT |
711 | /* |
712 | * Allocate & map buffers for page given the extent map. Write it out. | |
713 | * except for the original page of a writepage, this is called on | |
714 | * delalloc/unwritten pages only, for the original page it is possible | |
715 | * that the page has no mapping at all. | |
716 | */ | |
f6d6d4fc | 717 | STATIC int |
1da177e4 LT |
718 | xfs_convert_page( |
719 | struct inode *inode, | |
720 | struct page *page, | |
10ce4444 | 721 | loff_t tindex, |
1defeac9 | 722 | xfs_iomap_t *mp, |
f6d6d4fc | 723 | xfs_ioend_t **ioendp, |
1da177e4 | 724 | struct writeback_control *wbc, |
1da177e4 LT |
725 | int startio, |
726 | int all_bh) | |
727 | { | |
f6d6d4fc | 728 | struct buffer_head *bh, *head; |
9260dc6b CH |
729 | xfs_off_t end_offset; |
730 | unsigned long p_offset; | |
f6d6d4fc | 731 | unsigned int type; |
1da177e4 | 732 | int bbits = inode->i_blkbits; |
24e17b5f | 733 | int len, page_dirty; |
f6d6d4fc | 734 | int count = 0, done = 0, uptodate = 1; |
9260dc6b | 735 | xfs_off_t offset = page_offset(page); |
1da177e4 | 736 | |
10ce4444 CH |
737 | if (page->index != tindex) |
738 | goto fail; | |
529ae9aa | 739 | if (!trylock_page(page)) |
10ce4444 CH |
740 | goto fail; |
741 | if (PageWriteback(page)) | |
742 | goto fail_unlock_page; | |
743 | if (page->mapping != inode->i_mapping) | |
744 | goto fail_unlock_page; | |
745 | if (!xfs_is_delayed_page(page, (*ioendp)->io_type)) | |
746 | goto fail_unlock_page; | |
747 | ||
24e17b5f NS |
748 | /* |
749 | * page_dirty is initially a count of buffers on the page before | |
c41564b5 | 750 | * EOF and is decremented as we move each into a cleanable state. |
9260dc6b CH |
751 | * |
752 | * Derivation: | |
753 | * | |
754 | * End offset is the highest offset that this page should represent. | |
755 | * If we are on the last page, (end_offset & (PAGE_CACHE_SIZE - 1)) | |
756 | * will evaluate non-zero and be less than PAGE_CACHE_SIZE and | |
757 | * hence give us the correct page_dirty count. On any other page, | |
758 | * it will be zero and in that case we need page_dirty to be the | |
759 | * count of buffers on the page. | |
24e17b5f | 760 | */ |
9260dc6b CH |
761 | end_offset = min_t(unsigned long long, |
762 | (xfs_off_t)(page->index + 1) << PAGE_CACHE_SHIFT, | |
763 | i_size_read(inode)); | |
764 | ||
24e17b5f | 765 | len = 1 << inode->i_blkbits; |
9260dc6b CH |
766 | p_offset = min_t(unsigned long, end_offset & (PAGE_CACHE_SIZE - 1), |
767 | PAGE_CACHE_SIZE); | |
768 | p_offset = p_offset ? roundup(p_offset, len) : PAGE_CACHE_SIZE; | |
769 | page_dirty = p_offset / len; | |
24e17b5f | 770 | |
1da177e4 LT |
771 | bh = head = page_buffers(page); |
772 | do { | |
9260dc6b | 773 | if (offset >= end_offset) |
1da177e4 | 774 | break; |
f6d6d4fc CH |
775 | if (!buffer_uptodate(bh)) |
776 | uptodate = 0; | |
777 | if (!(PageUptodate(page) || buffer_uptodate(bh))) { | |
778 | done = 1; | |
1da177e4 | 779 | continue; |
f6d6d4fc CH |
780 | } |
781 | ||
9260dc6b CH |
782 | if (buffer_unwritten(bh) || buffer_delay(bh)) { |
783 | if (buffer_unwritten(bh)) | |
784 | type = IOMAP_UNWRITTEN; | |
785 | else | |
786 | type = IOMAP_DELAY; | |
787 | ||
788 | if (!xfs_iomap_valid(mp, offset)) { | |
f6d6d4fc | 789 | done = 1; |
9260dc6b CH |
790 | continue; |
791 | } | |
792 | ||
793 | ASSERT(!(mp->iomap_flags & IOMAP_HOLE)); | |
794 | ASSERT(!(mp->iomap_flags & IOMAP_DELAY)); | |
795 | ||
796 | xfs_map_at_offset(bh, offset, bbits, mp); | |
797 | if (startio) { | |
7336cea8 | 798 | xfs_add_to_ioend(inode, bh, offset, |
9260dc6b CH |
799 | type, ioendp, done); |
800 | } else { | |
801 | set_buffer_dirty(bh); | |
802 | unlock_buffer(bh); | |
803 | mark_buffer_dirty(bh); | |
804 | } | |
805 | page_dirty--; | |
806 | count++; | |
807 | } else { | |
df3c7244 | 808 | type = IOMAP_NEW; |
9260dc6b | 809 | if (buffer_mapped(bh) && all_bh && startio) { |
1da177e4 | 810 | lock_buffer(bh); |
7336cea8 | 811 | xfs_add_to_ioend(inode, bh, offset, |
f6d6d4fc CH |
812 | type, ioendp, done); |
813 | count++; | |
24e17b5f | 814 | page_dirty--; |
9260dc6b CH |
815 | } else { |
816 | done = 1; | |
1da177e4 | 817 | } |
1da177e4 | 818 | } |
7336cea8 | 819 | } while (offset += len, (bh = bh->b_this_page) != head); |
1da177e4 | 820 | |
f6d6d4fc CH |
821 | if (uptodate && bh == head) |
822 | SetPageUptodate(page); | |
823 | ||
824 | if (startio) { | |
f5e596bb | 825 | if (count) { |
9fddaca2 | 826 | wbc->nr_to_write--; |
0d99519e | 827 | if (wbc->nr_to_write <= 0) |
f5e596bb | 828 | done = 1; |
f5e596bb | 829 | } |
b41759cf | 830 | xfs_start_page_writeback(page, !page_dirty, count); |
1da177e4 | 831 | } |
f6d6d4fc CH |
832 | |
833 | return done; | |
10ce4444 CH |
834 | fail_unlock_page: |
835 | unlock_page(page); | |
836 | fail: | |
837 | return 1; | |
1da177e4 LT |
838 | } |
839 | ||
840 | /* | |
841 | * Convert & write out a cluster of pages in the same extent as defined | |
842 | * by mp and following the start page. | |
843 | */ | |
844 | STATIC void | |
845 | xfs_cluster_write( | |
846 | struct inode *inode, | |
847 | pgoff_t tindex, | |
848 | xfs_iomap_t *iomapp, | |
f6d6d4fc | 849 | xfs_ioend_t **ioendp, |
1da177e4 LT |
850 | struct writeback_control *wbc, |
851 | int startio, | |
852 | int all_bh, | |
853 | pgoff_t tlast) | |
854 | { | |
10ce4444 CH |
855 | struct pagevec pvec; |
856 | int done = 0, i; | |
1da177e4 | 857 | |
10ce4444 CH |
858 | pagevec_init(&pvec, 0); |
859 | while (!done && tindex <= tlast) { | |
860 | unsigned len = min_t(pgoff_t, PAGEVEC_SIZE, tlast - tindex + 1); | |
861 | ||
862 | if (!pagevec_lookup(&pvec, inode->i_mapping, tindex, len)) | |
1da177e4 | 863 | break; |
10ce4444 CH |
864 | |
865 | for (i = 0; i < pagevec_count(&pvec); i++) { | |
866 | done = xfs_convert_page(inode, pvec.pages[i], tindex++, | |
867 | iomapp, ioendp, wbc, startio, all_bh); | |
868 | if (done) | |
869 | break; | |
870 | } | |
871 | ||
872 | pagevec_release(&pvec); | |
873 | cond_resched(); | |
1da177e4 LT |
874 | } |
875 | } | |
876 | ||
877 | /* | |
878 | * Calling this without startio set means we are being asked to make a dirty | |
879 | * page ready for freeing it's buffers. When called with startio set then | |
880 | * we are coming from writepage. | |
881 | * | |
882 | * When called with startio set it is important that we write the WHOLE | |
883 | * page if possible. | |
884 | * The bh->b_state's cannot know if any of the blocks or which block for | |
885 | * that matter are dirty due to mmap writes, and therefore bh uptodate is | |
c41564b5 | 886 | * only valid if the page itself isn't completely uptodate. Some layers |
1da177e4 LT |
887 | * may clear the page dirty flag prior to calling write page, under the |
888 | * assumption the entire page will be written out; by not writing out the | |
889 | * whole page the page can be reused before all valid dirty data is | |
890 | * written out. Note: in the case of a page that has been dirty'd by | |
891 | * mapwrite and but partially setup by block_prepare_write the | |
892 | * bh->b_states's will not agree and only ones setup by BPW/BCW will have | |
893 | * valid state, thus the whole page must be written out thing. | |
894 | */ | |
895 | ||
896 | STATIC int | |
897 | xfs_page_state_convert( | |
898 | struct inode *inode, | |
899 | struct page *page, | |
900 | struct writeback_control *wbc, | |
901 | int startio, | |
902 | int unmapped) /* also implies page uptodate */ | |
903 | { | |
f6d6d4fc | 904 | struct buffer_head *bh, *head; |
1defeac9 | 905 | xfs_iomap_t iomap; |
f6d6d4fc | 906 | xfs_ioend_t *ioend = NULL, *iohead = NULL; |
1da177e4 LT |
907 | loff_t offset; |
908 | unsigned long p_offset = 0; | |
f6d6d4fc | 909 | unsigned int type; |
1da177e4 LT |
910 | __uint64_t end_offset; |
911 | pgoff_t end_index, last_index, tlast; | |
d5cb48aa CH |
912 | ssize_t size, len; |
913 | int flags, err, iomap_valid = 0, uptodate = 1; | |
8272145c NS |
914 | int page_dirty, count = 0; |
915 | int trylock = 0; | |
6c4fe19f | 916 | int all_bh = unmapped; |
1da177e4 | 917 | |
8272145c NS |
918 | if (startio) { |
919 | if (wbc->sync_mode == WB_SYNC_NONE && wbc->nonblocking) | |
920 | trylock |= BMAPI_TRYLOCK; | |
921 | } | |
3ba0815a | 922 | |
1da177e4 LT |
923 | /* Is this page beyond the end of the file? */ |
924 | offset = i_size_read(inode); | |
925 | end_index = offset >> PAGE_CACHE_SHIFT; | |
926 | last_index = (offset - 1) >> PAGE_CACHE_SHIFT; | |
927 | if (page->index >= end_index) { | |
928 | if ((page->index >= end_index + 1) || | |
929 | !(i_size_read(inode) & (PAGE_CACHE_SIZE - 1))) { | |
19d5bcf3 NS |
930 | if (startio) |
931 | unlock_page(page); | |
932 | return 0; | |
1da177e4 LT |
933 | } |
934 | } | |
935 | ||
1da177e4 | 936 | /* |
24e17b5f | 937 | * page_dirty is initially a count of buffers on the page before |
c41564b5 | 938 | * EOF and is decremented as we move each into a cleanable state. |
f6d6d4fc CH |
939 | * |
940 | * Derivation: | |
941 | * | |
942 | * End offset is the highest offset that this page should represent. | |
943 | * If we are on the last page, (end_offset & (PAGE_CACHE_SIZE - 1)) | |
944 | * will evaluate non-zero and be less than PAGE_CACHE_SIZE and | |
945 | * hence give us the correct page_dirty count. On any other page, | |
946 | * it will be zero and in that case we need page_dirty to be the | |
947 | * count of buffers on the page. | |
948 | */ | |
949 | end_offset = min_t(unsigned long long, | |
950 | (xfs_off_t)(page->index + 1) << PAGE_CACHE_SHIFT, offset); | |
24e17b5f | 951 | len = 1 << inode->i_blkbits; |
f6d6d4fc CH |
952 | p_offset = min_t(unsigned long, end_offset & (PAGE_CACHE_SIZE - 1), |
953 | PAGE_CACHE_SIZE); | |
954 | p_offset = p_offset ? roundup(p_offset, len) : PAGE_CACHE_SIZE; | |
24e17b5f NS |
955 | page_dirty = p_offset / len; |
956 | ||
24e17b5f | 957 | bh = head = page_buffers(page); |
f6d6d4fc | 958 | offset = page_offset(page); |
df3c7244 DC |
959 | flags = BMAPI_READ; |
960 | type = IOMAP_NEW; | |
f6d6d4fc | 961 | |
f6d6d4fc | 962 | /* TODO: cleanup count and page_dirty */ |
1da177e4 LT |
963 | |
964 | do { | |
965 | if (offset >= end_offset) | |
966 | break; | |
967 | if (!buffer_uptodate(bh)) | |
968 | uptodate = 0; | |
f6d6d4fc | 969 | if (!(PageUptodate(page) || buffer_uptodate(bh)) && !startio) { |
1defeac9 CH |
970 | /* |
971 | * the iomap is actually still valid, but the ioend | |
972 | * isn't. shouldn't happen too often. | |
973 | */ | |
974 | iomap_valid = 0; | |
1da177e4 | 975 | continue; |
f6d6d4fc | 976 | } |
1da177e4 | 977 | |
1defeac9 CH |
978 | if (iomap_valid) |
979 | iomap_valid = xfs_iomap_valid(&iomap, offset); | |
1da177e4 LT |
980 | |
981 | /* | |
982 | * First case, map an unwritten extent and prepare for | |
983 | * extent state conversion transaction on completion. | |
f6d6d4fc | 984 | * |
1da177e4 LT |
985 | * Second case, allocate space for a delalloc buffer. |
986 | * We can return EAGAIN here in the release page case. | |
d5cb48aa CH |
987 | * |
988 | * Third case, an unmapped buffer was found, and we are | |
989 | * in a path where we need to write the whole page out. | |
df3c7244 | 990 | */ |
d5cb48aa CH |
991 | if (buffer_unwritten(bh) || buffer_delay(bh) || |
992 | ((buffer_uptodate(bh) || PageUptodate(page)) && | |
993 | !buffer_mapped(bh) && (unmapped || startio))) { | |
effd120e DC |
994 | int new_ioend = 0; |
995 | ||
df3c7244 | 996 | /* |
6c4fe19f CH |
997 | * Make sure we don't use a read-only iomap |
998 | */ | |
df3c7244 | 999 | if (flags == BMAPI_READ) |
6c4fe19f CH |
1000 | iomap_valid = 0; |
1001 | ||
f6d6d4fc CH |
1002 | if (buffer_unwritten(bh)) { |
1003 | type = IOMAP_UNWRITTEN; | |
8272145c | 1004 | flags = BMAPI_WRITE | BMAPI_IGNSTATE; |
d5cb48aa | 1005 | } else if (buffer_delay(bh)) { |
f6d6d4fc | 1006 | type = IOMAP_DELAY; |
8272145c | 1007 | flags = BMAPI_ALLOCATE | trylock; |
d5cb48aa | 1008 | } else { |
6c4fe19f | 1009 | type = IOMAP_NEW; |
8272145c | 1010 | flags = BMAPI_WRITE | BMAPI_MMAP; |
f6d6d4fc CH |
1011 | } |
1012 | ||
1defeac9 | 1013 | if (!iomap_valid) { |
effd120e DC |
1014 | /* |
1015 | * if we didn't have a valid mapping then we | |
1016 | * need to ensure that we put the new mapping | |
1017 | * in a new ioend structure. This needs to be | |
1018 | * done to ensure that the ioends correctly | |
1019 | * reflect the block mappings at io completion | |
1020 | * for unwritten extent conversion. | |
1021 | */ | |
1022 | new_ioend = 1; | |
6c4fe19f CH |
1023 | if (type == IOMAP_NEW) { |
1024 | size = xfs_probe_cluster(inode, | |
1025 | page, bh, head, 0); | |
d5cb48aa CH |
1026 | } else { |
1027 | size = len; | |
1028 | } | |
1029 | ||
1030 | err = xfs_map_blocks(inode, offset, size, | |
1031 | &iomap, flags); | |
f6d6d4fc | 1032 | if (err) |
1da177e4 | 1033 | goto error; |
1defeac9 | 1034 | iomap_valid = xfs_iomap_valid(&iomap, offset); |
1da177e4 | 1035 | } |
1defeac9 CH |
1036 | if (iomap_valid) { |
1037 | xfs_map_at_offset(bh, offset, | |
1038 | inode->i_blkbits, &iomap); | |
1da177e4 | 1039 | if (startio) { |
7336cea8 | 1040 | xfs_add_to_ioend(inode, bh, offset, |
1defeac9 | 1041 | type, &ioend, |
effd120e | 1042 | new_ioend); |
1da177e4 LT |
1043 | } else { |
1044 | set_buffer_dirty(bh); | |
1045 | unlock_buffer(bh); | |
1046 | mark_buffer_dirty(bh); | |
1047 | } | |
1048 | page_dirty--; | |
f6d6d4fc | 1049 | count++; |
1da177e4 | 1050 | } |
d5cb48aa | 1051 | } else if (buffer_uptodate(bh) && startio) { |
6c4fe19f CH |
1052 | /* |
1053 | * we got here because the buffer is already mapped. | |
1054 | * That means it must already have extents allocated | |
1055 | * underneath it. Map the extent by reading it. | |
1056 | */ | |
df3c7244 | 1057 | if (!iomap_valid || flags != BMAPI_READ) { |
6c4fe19f CH |
1058 | flags = BMAPI_READ; |
1059 | size = xfs_probe_cluster(inode, page, bh, | |
1060 | head, 1); | |
1061 | err = xfs_map_blocks(inode, offset, size, | |
1062 | &iomap, flags); | |
1063 | if (err) | |
1064 | goto error; | |
1065 | iomap_valid = xfs_iomap_valid(&iomap, offset); | |
1066 | } | |
d5cb48aa | 1067 | |
df3c7244 DC |
1068 | /* |
1069 | * We set the type to IOMAP_NEW in case we are doing a | |
1070 | * small write at EOF that is extending the file but | |
1071 | * without needing an allocation. We need to update the | |
1072 | * file size on I/O completion in this case so it is | |
1073 | * the same case as having just allocated a new extent | |
1074 | * that we are writing into for the first time. | |
1075 | */ | |
1076 | type = IOMAP_NEW; | |
ca5de404 | 1077 | if (trylock_buffer(bh)) { |
d5cb48aa | 1078 | ASSERT(buffer_mapped(bh)); |
6c4fe19f CH |
1079 | if (iomap_valid) |
1080 | all_bh = 1; | |
7336cea8 | 1081 | xfs_add_to_ioend(inode, bh, offset, type, |
d5cb48aa CH |
1082 | &ioend, !iomap_valid); |
1083 | page_dirty--; | |
1084 | count++; | |
f6d6d4fc | 1085 | } else { |
1defeac9 | 1086 | iomap_valid = 0; |
1da177e4 | 1087 | } |
d5cb48aa CH |
1088 | } else if ((buffer_uptodate(bh) || PageUptodate(page)) && |
1089 | (unmapped || startio)) { | |
1090 | iomap_valid = 0; | |
1da177e4 | 1091 | } |
f6d6d4fc CH |
1092 | |
1093 | if (!iohead) | |
1094 | iohead = ioend; | |
1095 | ||
1096 | } while (offset += len, ((bh = bh->b_this_page) != head)); | |
1da177e4 LT |
1097 | |
1098 | if (uptodate && bh == head) | |
1099 | SetPageUptodate(page); | |
1100 | ||
f6d6d4fc | 1101 | if (startio) |
b41759cf | 1102 | xfs_start_page_writeback(page, 1, count); |
1da177e4 | 1103 | |
1defeac9 CH |
1104 | if (ioend && iomap_valid) { |
1105 | offset = (iomap.iomap_offset + iomap.iomap_bsize - 1) >> | |
1da177e4 | 1106 | PAGE_CACHE_SHIFT; |
775bf6c9 | 1107 | tlast = min_t(pgoff_t, offset, last_index); |
1defeac9 | 1108 | xfs_cluster_write(inode, page->index + 1, &iomap, &ioend, |
6c4fe19f | 1109 | wbc, startio, all_bh, tlast); |
1da177e4 LT |
1110 | } |
1111 | ||
f6d6d4fc | 1112 | if (iohead) |
06342cf8 | 1113 | xfs_submit_ioend(wbc, iohead); |
f6d6d4fc | 1114 | |
1da177e4 LT |
1115 | return page_dirty; |
1116 | ||
1117 | error: | |
f6d6d4fc CH |
1118 | if (iohead) |
1119 | xfs_cancel_ioend(iohead); | |
1da177e4 LT |
1120 | |
1121 | /* | |
1122 | * If it's delalloc and we have nowhere to put it, | |
1123 | * throw it away, unless the lower layers told | |
1124 | * us to try again. | |
1125 | */ | |
1126 | if (err != -EAGAIN) { | |
f6d6d4fc | 1127 | if (!unmapped) |
1da177e4 | 1128 | block_invalidatepage(page, 0); |
1da177e4 LT |
1129 | ClearPageUptodate(page); |
1130 | } | |
1131 | return err; | |
1132 | } | |
1133 | ||
f51623b2 NS |
1134 | /* |
1135 | * writepage: Called from one of two places: | |
1136 | * | |
1137 | * 1. we are flushing a delalloc buffer head. | |
1138 | * | |
1139 | * 2. we are writing out a dirty page. Typically the page dirty | |
1140 | * state is cleared before we get here. In this case is it | |
1141 | * conceivable we have no buffer heads. | |
1142 | * | |
1143 | * For delalloc space on the page we need to allocate space and | |
1144 | * flush it. For unmapped buffer heads on the page we should | |
1145 | * allocate space if the page is uptodate. For any other dirty | |
1146 | * buffer heads on the page we should flush them. | |
1147 | * | |
1148 | * If we detect that a transaction would be required to flush | |
1149 | * the page, we have to check the process flags first, if we | |
1150 | * are already in a transaction or disk I/O during allocations | |
1151 | * is off, we need to fail the writepage and redirty the page. | |
1152 | */ | |
1153 | ||
1154 | STATIC int | |
e4c573bb | 1155 | xfs_vm_writepage( |
f51623b2 NS |
1156 | struct page *page, |
1157 | struct writeback_control *wbc) | |
1158 | { | |
1159 | int error; | |
1160 | int need_trans; | |
1161 | int delalloc, unmapped, unwritten; | |
1162 | struct inode *inode = page->mapping->host; | |
1163 | ||
0b1b213f | 1164 | trace_xfs_writepage(inode, page, 0); |
f51623b2 NS |
1165 | |
1166 | /* | |
1167 | * We need a transaction if: | |
1168 | * 1. There are delalloc buffers on the page | |
1169 | * 2. The page is uptodate and we have unmapped buffers | |
1170 | * 3. The page is uptodate and we have no buffers | |
1171 | * 4. There are unwritten buffers on the page | |
1172 | */ | |
1173 | ||
1174 | if (!page_has_buffers(page)) { | |
1175 | unmapped = 1; | |
1176 | need_trans = 1; | |
1177 | } else { | |
1178 | xfs_count_page_state(page, &delalloc, &unmapped, &unwritten); | |
1179 | if (!PageUptodate(page)) | |
1180 | unmapped = 0; | |
1181 | need_trans = delalloc + unmapped + unwritten; | |
1182 | } | |
1183 | ||
1184 | /* | |
1185 | * If we need a transaction and the process flags say | |
1186 | * we are already in a transaction, or no IO is allowed | |
1187 | * then mark the page dirty again and leave the page | |
1188 | * as is. | |
1189 | */ | |
59c1b082 | 1190 | if (current_test_flags(PF_FSTRANS) && need_trans) |
f51623b2 NS |
1191 | goto out_fail; |
1192 | ||
1193 | /* | |
1194 | * Delay hooking up buffer heads until we have | |
1195 | * made our go/no-go decision. | |
1196 | */ | |
1197 | if (!page_has_buffers(page)) | |
1198 | create_empty_buffers(page, 1 << inode->i_blkbits, 0); | |
1199 | ||
c8a4051c ES |
1200 | |
1201 | /* | |
1202 | * VM calculation for nr_to_write seems off. Bump it way | |
1203 | * up, this gets simple streaming writes zippy again. | |
1204 | * To be reviewed again after Jens' writeback changes. | |
1205 | */ | |
1206 | wbc->nr_to_write *= 4; | |
1207 | ||
f51623b2 NS |
1208 | /* |
1209 | * Convert delayed allocate, unwritten or unmapped space | |
1210 | * to real space and flush out to disk. | |
1211 | */ | |
1212 | error = xfs_page_state_convert(inode, page, wbc, 1, unmapped); | |
1213 | if (error == -EAGAIN) | |
1214 | goto out_fail; | |
1215 | if (unlikely(error < 0)) | |
1216 | goto out_unlock; | |
1217 | ||
1218 | return 0; | |
1219 | ||
1220 | out_fail: | |
1221 | redirty_page_for_writepage(wbc, page); | |
1222 | unlock_page(page); | |
1223 | return 0; | |
1224 | out_unlock: | |
1225 | unlock_page(page); | |
1226 | return error; | |
1227 | } | |
1228 | ||
7d4fb40a NS |
1229 | STATIC int |
1230 | xfs_vm_writepages( | |
1231 | struct address_space *mapping, | |
1232 | struct writeback_control *wbc) | |
1233 | { | |
b3aea4ed | 1234 | xfs_iflags_clear(XFS_I(mapping->host), XFS_ITRUNCATED); |
7d4fb40a NS |
1235 | return generic_writepages(mapping, wbc); |
1236 | } | |
1237 | ||
f51623b2 NS |
1238 | /* |
1239 | * Called to move a page into cleanable state - and from there | |
1240 | * to be released. Possibly the page is already clean. We always | |
1241 | * have buffer heads in this call. | |
1242 | * | |
1243 | * Returns 0 if the page is ok to release, 1 otherwise. | |
1244 | * | |
1245 | * Possible scenarios are: | |
1246 | * | |
1247 | * 1. We are being called to release a page which has been written | |
1248 | * to via regular I/O. buffer heads will be dirty and possibly | |
1249 | * delalloc. If no delalloc buffer heads in this case then we | |
1250 | * can just return zero. | |
1251 | * | |
1252 | * 2. We are called to release a page which has been written via | |
1253 | * mmap, all we need to do is ensure there is no delalloc | |
1254 | * state in the buffer heads, if not we can let the caller | |
1255 | * free them and we should come back later via writepage. | |
1256 | */ | |
1257 | STATIC int | |
238f4c54 | 1258 | xfs_vm_releasepage( |
f51623b2 NS |
1259 | struct page *page, |
1260 | gfp_t gfp_mask) | |
1261 | { | |
1262 | struct inode *inode = page->mapping->host; | |
1263 | int dirty, delalloc, unmapped, unwritten; | |
1264 | struct writeback_control wbc = { | |
1265 | .sync_mode = WB_SYNC_ALL, | |
1266 | .nr_to_write = 1, | |
1267 | }; | |
1268 | ||
0b1b213f | 1269 | trace_xfs_releasepage(inode, page, 0); |
f51623b2 | 1270 | |
238f4c54 NS |
1271 | if (!page_has_buffers(page)) |
1272 | return 0; | |
1273 | ||
f51623b2 NS |
1274 | xfs_count_page_state(page, &delalloc, &unmapped, &unwritten); |
1275 | if (!delalloc && !unwritten) | |
1276 | goto free_buffers; | |
1277 | ||
1278 | if (!(gfp_mask & __GFP_FS)) | |
1279 | return 0; | |
1280 | ||
1281 | /* If we are already inside a transaction or the thread cannot | |
1282 | * do I/O, we cannot release this page. | |
1283 | */ | |
59c1b082 | 1284 | if (current_test_flags(PF_FSTRANS)) |
f51623b2 NS |
1285 | return 0; |
1286 | ||
1287 | /* | |
1288 | * Convert delalloc space to real space, do not flush the | |
1289 | * data out to disk, that will be done by the caller. | |
1290 | * Never need to allocate space here - we will always | |
1291 | * come back to writepage in that case. | |
1292 | */ | |
1293 | dirty = xfs_page_state_convert(inode, page, &wbc, 0, 0); | |
1294 | if (dirty == 0 && !unwritten) | |
1295 | goto free_buffers; | |
1296 | return 0; | |
1297 | ||
1298 | free_buffers: | |
1299 | return try_to_free_buffers(page); | |
1300 | } | |
1301 | ||
1da177e4 | 1302 | STATIC int |
c2536668 | 1303 | __xfs_get_blocks( |
1da177e4 LT |
1304 | struct inode *inode, |
1305 | sector_t iblock, | |
1da177e4 LT |
1306 | struct buffer_head *bh_result, |
1307 | int create, | |
1308 | int direct, | |
1309 | bmapi_flags_t flags) | |
1310 | { | |
1da177e4 | 1311 | xfs_iomap_t iomap; |
fdc7ed75 NS |
1312 | xfs_off_t offset; |
1313 | ssize_t size; | |
c2536668 | 1314 | int niomap = 1; |
1da177e4 | 1315 | int error; |
1da177e4 | 1316 | |
fdc7ed75 | 1317 | offset = (xfs_off_t)iblock << inode->i_blkbits; |
c2536668 NS |
1318 | ASSERT(bh_result->b_size >= (1 << inode->i_blkbits)); |
1319 | size = bh_result->b_size; | |
364f358a LM |
1320 | |
1321 | if (!create && direct && offset >= i_size_read(inode)) | |
1322 | return 0; | |
1323 | ||
541d7d3c | 1324 | error = xfs_iomap(XFS_I(inode), offset, size, |
67fcaa73 | 1325 | create ? flags : BMAPI_READ, &iomap, &niomap); |
1da177e4 LT |
1326 | if (error) |
1327 | return -error; | |
c2536668 | 1328 | if (niomap == 0) |
1da177e4 LT |
1329 | return 0; |
1330 | ||
1331 | if (iomap.iomap_bn != IOMAP_DADDR_NULL) { | |
87cbc49c NS |
1332 | /* |
1333 | * For unwritten extents do not report a disk address on | |
1da177e4 LT |
1334 | * the read case (treat as if we're reading into a hole). |
1335 | */ | |
1336 | if (create || !(iomap.iomap_flags & IOMAP_UNWRITTEN)) { | |
87cbc49c NS |
1337 | xfs_map_buffer(bh_result, &iomap, offset, |
1338 | inode->i_blkbits); | |
1da177e4 LT |
1339 | } |
1340 | if (create && (iomap.iomap_flags & IOMAP_UNWRITTEN)) { | |
1341 | if (direct) | |
1342 | bh_result->b_private = inode; | |
1343 | set_buffer_unwritten(bh_result); | |
1da177e4 LT |
1344 | } |
1345 | } | |
1346 | ||
c2536668 NS |
1347 | /* |
1348 | * If this is a realtime file, data may be on a different device. | |
1349 | * to that pointed to from the buffer_head b_bdev currently. | |
1350 | */ | |
ce8e922c | 1351 | bh_result->b_bdev = iomap.iomap_target->bt_bdev; |
1da177e4 | 1352 | |
c2536668 | 1353 | /* |
549054af DC |
1354 | * If we previously allocated a block out beyond eof and we are now |
1355 | * coming back to use it then we will need to flag it as new even if it | |
1356 | * has a disk address. | |
1357 | * | |
1358 | * With sub-block writes into unwritten extents we also need to mark | |
1359 | * the buffer as new so that the unwritten parts of the buffer gets | |
1360 | * correctly zeroed. | |
1da177e4 LT |
1361 | */ |
1362 | if (create && | |
1363 | ((!buffer_mapped(bh_result) && !buffer_uptodate(bh_result)) || | |
549054af DC |
1364 | (offset >= i_size_read(inode)) || |
1365 | (iomap.iomap_flags & (IOMAP_NEW|IOMAP_UNWRITTEN)))) | |
1da177e4 | 1366 | set_buffer_new(bh_result); |
1da177e4 LT |
1367 | |
1368 | if (iomap.iomap_flags & IOMAP_DELAY) { | |
1369 | BUG_ON(direct); | |
1370 | if (create) { | |
1371 | set_buffer_uptodate(bh_result); | |
1372 | set_buffer_mapped(bh_result); | |
1373 | set_buffer_delay(bh_result); | |
1374 | } | |
1375 | } | |
1376 | ||
c2536668 | 1377 | if (direct || size > (1 << inode->i_blkbits)) { |
fdc7ed75 NS |
1378 | ASSERT(iomap.iomap_bsize - iomap.iomap_delta > 0); |
1379 | offset = min_t(xfs_off_t, | |
c2536668 NS |
1380 | iomap.iomap_bsize - iomap.iomap_delta, size); |
1381 | bh_result->b_size = (ssize_t)min_t(xfs_off_t, LONG_MAX, offset); | |
1da177e4 LT |
1382 | } |
1383 | ||
1384 | return 0; | |
1385 | } | |
1386 | ||
1387 | int | |
c2536668 | 1388 | xfs_get_blocks( |
1da177e4 LT |
1389 | struct inode *inode, |
1390 | sector_t iblock, | |
1391 | struct buffer_head *bh_result, | |
1392 | int create) | |
1393 | { | |
c2536668 | 1394 | return __xfs_get_blocks(inode, iblock, |
fa30bd05 | 1395 | bh_result, create, 0, BMAPI_WRITE); |
1da177e4 LT |
1396 | } |
1397 | ||
1398 | STATIC int | |
e4c573bb | 1399 | xfs_get_blocks_direct( |
1da177e4 LT |
1400 | struct inode *inode, |
1401 | sector_t iblock, | |
1da177e4 LT |
1402 | struct buffer_head *bh_result, |
1403 | int create) | |
1404 | { | |
c2536668 | 1405 | return __xfs_get_blocks(inode, iblock, |
1d8fa7a2 | 1406 | bh_result, create, 1, BMAPI_WRITE|BMAPI_DIRECT); |
1da177e4 LT |
1407 | } |
1408 | ||
f0973863 | 1409 | STATIC void |
e4c573bb | 1410 | xfs_end_io_direct( |
f0973863 CH |
1411 | struct kiocb *iocb, |
1412 | loff_t offset, | |
1413 | ssize_t size, | |
1414 | void *private) | |
1415 | { | |
1416 | xfs_ioend_t *ioend = iocb->private; | |
1417 | ||
1418 | /* | |
1419 | * Non-NULL private data means we need to issue a transaction to | |
1420 | * convert a range from unwritten to written extents. This needs | |
c41564b5 | 1421 | * to happen from process context but aio+dio I/O completion |
f0973863 | 1422 | * happens from irq context so we need to defer it to a workqueue. |
c41564b5 | 1423 | * This is not necessary for synchronous direct I/O, but we do |
f0973863 CH |
1424 | * it anyway to keep the code uniform and simpler. |
1425 | * | |
e927af90 DC |
1426 | * Well, if only it were that simple. Because synchronous direct I/O |
1427 | * requires extent conversion to occur *before* we return to userspace, | |
1428 | * we have to wait for extent conversion to complete. Look at the | |
1429 | * iocb that has been passed to us to determine if this is AIO or | |
1430 | * not. If it is synchronous, tell xfs_finish_ioend() to kick the | |
1431 | * workqueue and wait for it to complete. | |
1432 | * | |
f0973863 CH |
1433 | * The core direct I/O code might be changed to always call the |
1434 | * completion handler in the future, in which case all this can | |
1435 | * go away. | |
1436 | */ | |
ba87ea69 LM |
1437 | ioend->io_offset = offset; |
1438 | ioend->io_size = size; | |
1439 | if (ioend->io_type == IOMAP_READ) { | |
e927af90 | 1440 | xfs_finish_ioend(ioend, 0); |
ba87ea69 | 1441 | } else if (private && size > 0) { |
e927af90 | 1442 | xfs_finish_ioend(ioend, is_sync_kiocb(iocb)); |
f0973863 | 1443 | } else { |
ba87ea69 LM |
1444 | /* |
1445 | * A direct I/O write ioend starts it's life in unwritten | |
1446 | * state in case they map an unwritten extent. This write | |
1447 | * didn't map an unwritten extent so switch it's completion | |
1448 | * handler. | |
1449 | */ | |
5ec4fabb | 1450 | ioend->io_type = IOMAP_NEW; |
e927af90 | 1451 | xfs_finish_ioend(ioend, 0); |
f0973863 CH |
1452 | } |
1453 | ||
1454 | /* | |
c41564b5 | 1455 | * blockdev_direct_IO can return an error even after the I/O |
f0973863 CH |
1456 | * completion handler was called. Thus we need to protect |
1457 | * against double-freeing. | |
1458 | */ | |
1459 | iocb->private = NULL; | |
1460 | } | |
1461 | ||
1da177e4 | 1462 | STATIC ssize_t |
e4c573bb | 1463 | xfs_vm_direct_IO( |
1da177e4 LT |
1464 | int rw, |
1465 | struct kiocb *iocb, | |
1466 | const struct iovec *iov, | |
1467 | loff_t offset, | |
1468 | unsigned long nr_segs) | |
1469 | { | |
1470 | struct file *file = iocb->ki_filp; | |
1471 | struct inode *inode = file->f_mapping->host; | |
6214ed44 | 1472 | struct block_device *bdev; |
f0973863 | 1473 | ssize_t ret; |
1da177e4 | 1474 | |
6214ed44 | 1475 | bdev = xfs_find_bdev_for_inode(XFS_I(inode)); |
1da177e4 | 1476 | |
5fe878ae CH |
1477 | iocb->private = xfs_alloc_ioend(inode, rw == WRITE ? |
1478 | IOMAP_UNWRITTEN : IOMAP_READ); | |
1479 | ||
1480 | ret = blockdev_direct_IO_no_locking(rw, iocb, inode, bdev, iov, | |
1481 | offset, nr_segs, | |
1482 | xfs_get_blocks_direct, | |
1483 | xfs_end_io_direct); | |
f0973863 | 1484 | |
8459d86a | 1485 | if (unlikely(ret != -EIOCBQUEUED && iocb->private)) |
f0973863 CH |
1486 | xfs_destroy_ioend(iocb->private); |
1487 | return ret; | |
1da177e4 LT |
1488 | } |
1489 | ||
f51623b2 | 1490 | STATIC int |
d79689c7 | 1491 | xfs_vm_write_begin( |
f51623b2 | 1492 | struct file *file, |
d79689c7 NP |
1493 | struct address_space *mapping, |
1494 | loff_t pos, | |
1495 | unsigned len, | |
1496 | unsigned flags, | |
1497 | struct page **pagep, | |
1498 | void **fsdata) | |
f51623b2 | 1499 | { |
d79689c7 NP |
1500 | *pagep = NULL; |
1501 | return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata, | |
1502 | xfs_get_blocks); | |
f51623b2 | 1503 | } |
1da177e4 LT |
1504 | |
1505 | STATIC sector_t | |
e4c573bb | 1506 | xfs_vm_bmap( |
1da177e4 LT |
1507 | struct address_space *mapping, |
1508 | sector_t block) | |
1509 | { | |
1510 | struct inode *inode = (struct inode *)mapping->host; | |
739bfb2a | 1511 | struct xfs_inode *ip = XFS_I(inode); |
1da177e4 | 1512 | |
cf441eeb | 1513 | xfs_itrace_entry(XFS_I(inode)); |
126468b1 | 1514 | xfs_ilock(ip, XFS_IOLOCK_SHARED); |
739bfb2a | 1515 | xfs_flush_pages(ip, (xfs_off_t)0, -1, 0, FI_REMAPF); |
126468b1 | 1516 | xfs_iunlock(ip, XFS_IOLOCK_SHARED); |
c2536668 | 1517 | return generic_block_bmap(mapping, block, xfs_get_blocks); |
1da177e4 LT |
1518 | } |
1519 | ||
1520 | STATIC int | |
e4c573bb | 1521 | xfs_vm_readpage( |
1da177e4 LT |
1522 | struct file *unused, |
1523 | struct page *page) | |
1524 | { | |
c2536668 | 1525 | return mpage_readpage(page, xfs_get_blocks); |
1da177e4 LT |
1526 | } |
1527 | ||
1528 | STATIC int | |
e4c573bb | 1529 | xfs_vm_readpages( |
1da177e4 LT |
1530 | struct file *unused, |
1531 | struct address_space *mapping, | |
1532 | struct list_head *pages, | |
1533 | unsigned nr_pages) | |
1534 | { | |
c2536668 | 1535 | return mpage_readpages(mapping, pages, nr_pages, xfs_get_blocks); |
1da177e4 LT |
1536 | } |
1537 | ||
2ff28e22 | 1538 | STATIC void |
238f4c54 | 1539 | xfs_vm_invalidatepage( |
bcec2b7f NS |
1540 | struct page *page, |
1541 | unsigned long offset) | |
1542 | { | |
0b1b213f | 1543 | trace_xfs_invalidatepage(page->mapping->host, page, offset); |
2ff28e22 | 1544 | block_invalidatepage(page, offset); |
bcec2b7f NS |
1545 | } |
1546 | ||
f5e54d6e | 1547 | const struct address_space_operations xfs_address_space_operations = { |
e4c573bb NS |
1548 | .readpage = xfs_vm_readpage, |
1549 | .readpages = xfs_vm_readpages, | |
1550 | .writepage = xfs_vm_writepage, | |
7d4fb40a | 1551 | .writepages = xfs_vm_writepages, |
1da177e4 | 1552 | .sync_page = block_sync_page, |
238f4c54 NS |
1553 | .releasepage = xfs_vm_releasepage, |
1554 | .invalidatepage = xfs_vm_invalidatepage, | |
d79689c7 NP |
1555 | .write_begin = xfs_vm_write_begin, |
1556 | .write_end = generic_write_end, | |
e4c573bb NS |
1557 | .bmap = xfs_vm_bmap, |
1558 | .direct_IO = xfs_vm_direct_IO, | |
e965f963 | 1559 | .migratepage = buffer_migrate_page, |
bddaafa1 | 1560 | .is_partially_uptodate = block_is_partially_uptodate, |
aa261f54 | 1561 | .error_remove_page = generic_error_remove_page, |
1da177e4 | 1562 | }; |