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btrfs: make clear_extent_bit helpers static inline
[mirror_ubuntu-hirsute-kernel.git] / fs / btrfs / extent_io.h
CommitLineData
d1310b2e
CM		 1#ifndef __EXTENTIO__
2#define __EXTENTIO__
3
4#include <linux/rbtree.h>
ac467772 5#include "ulist.h"
d1310b2e
CM		 6
7/* bits for the extent state */
9ee49a04
DS		 8#define EXTENT_DIRTY (1U << 0)
9#define EXTENT_WRITEBACK (1U << 1)
10#define EXTENT_UPTODATE (1U << 2)
11#define EXTENT_LOCKED (1U << 3)
12#define EXTENT_NEW (1U << 4)
13#define EXTENT_DELALLOC (1U << 5)
14#define EXTENT_DEFRAG (1U << 6)
15#define EXTENT_BOUNDARY (1U << 9)
16#define EXTENT_NODATASUM (1U << 10)
17#define EXTENT_DO_ACCOUNTING (1U << 11)
18#define EXTENT_FIRST_DELALLOC (1U << 12)
19#define EXTENT_NEED_WAIT (1U << 13)
20#define EXTENT_DAMAGED (1U << 14)
21#define EXTENT_NORESERVE (1U << 15)
52472553 22#define EXTENT_QGROUP_RESERVED (1U << 16)
9ee49a04
DS		 23#define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK)
24#define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING | EXTENT_FIRST_DELALLOC)
d1310b2e 25
261507a0
LZ		 26/*
27 * flags for bio submission. The high bits indicate the compression
28 * type for this bio
29 */
c8b97818 30#define EXTENT_BIO_COMPRESSED 1
de0022b9 31#define EXTENT_BIO_TREE_LOG 2
4b384318 32#define EXTENT_BIO_PARENT_LOCKED 4
261507a0 33#define EXTENT_BIO_FLAG_SHIFT 16
c8b97818 34
b4ce94de
CM		 35/* these are bit numbers for test/set bit */
36#define EXTENT_BUFFER_UPTODATE 0
b9473439 37#define EXTENT_BUFFER_DIRTY 2
a826d6dc 38#define EXTENT_BUFFER_CORRUPT 3
ab0fff03 39#define EXTENT_BUFFER_READAHEAD 4 /* this got triggered by readahead */
3083ee2e
JB		 40#define EXTENT_BUFFER_TREE_REF 5
41#define EXTENT_BUFFER_STALE 6
0b32f4bb 42#define EXTENT_BUFFER_WRITEBACK 7
656f30db 43#define EXTENT_BUFFER_READ_ERR 8 /* read IO error */
815a51c7 44#define EXTENT_BUFFER_DUMMY 9
34b41ace 45#define EXTENT_BUFFER_IN_TREE 10
656f30db 46#define EXTENT_BUFFER_WRITE_ERR 11 /* write IO error */
b4ce94de 47
a791e35e 48/* these are flags for extent_clear_unlock_delalloc */
c2790a2e
JB		 49#define PAGE_UNLOCK (1 << 0)
50#define PAGE_CLEAR_DIRTY (1 << 1)
51#define PAGE_SET_WRITEBACK (1 << 2)
52#define PAGE_END_WRITEBACK (1 << 3)
53#define PAGE_SET_PRIVATE2 (1 << 4)
704de49d 54#define PAGE_SET_ERROR (1 << 5)
a791e35e 55
d1310b2e
CM		 56/*
57 * page->private values. Every page that is controlled by the extent
58 * map has page->private set to one.
59 */
60#define EXTENT_PAGE_PRIVATE 1
d1310b2e 61
70dec807 62struct extent_state;
ea466794 63struct btrfs_root;
facc8a22 64struct btrfs_io_bio;
70dec807 65
44b8bd7e 66typedef int (extent_submit_bio_hook_t)(struct inode *inode, int rw,
c8b97818 67 struct bio *bio, int mirror_num,
eaf25d93 68 unsigned long bio_flags, u64 bio_offset);
d1310b2e 69struct extent_io_ops {
c8b97818 70 int (*fill_delalloc)(struct inode *inode, struct page *locked_page,
771ed689
CM		 71 u64 start, u64 end, int *page_started,
72 unsigned long *nr_written);
247e743c 73 int (*writepage_start_hook)(struct page *page, u64 start, u64 end);
d1310b2e 74 int (*writepage_io_hook)(struct page *page, u64 start, u64 end);
44b8bd7e 75 extent_submit_bio_hook_t *submit_bio_hook;
64a16701 76 int (*merge_bio_hook)(int rw, struct page *page, unsigned long offset,
c8b97818
CM		 77 size_t size, struct bio *bio,
78 unsigned long bio_flags);
ea466794 79 int (*readpage_io_failed_hook)(struct page *page, int failed_mirror);
facc8a22
MX		 80 int (*readpage_end_io_hook)(struct btrfs_io_bio *io_bio, u64 phy_offset,
81 struct page *page, u64 start, u64 end,
82 int mirror);
1259ab75 83 int (*writepage_end_io_hook)(struct page *page, u64 start, u64 end,
e6dcd2dc 84 struct extent_state *state, int uptodate);
1bf85046 85 void (*set_bit_hook)(struct inode *inode, struct extent_state *state,
9ee49a04 86 unsigned *bits);
1bf85046 87 void (*clear_bit_hook)(struct inode *inode, struct extent_state *state,
9ee49a04 88 unsigned *bits);
1bf85046
JM		 89 void (*merge_extent_hook)(struct inode *inode,
90 struct extent_state *new,
91 struct extent_state *other);
92 void (*split_extent_hook)(struct inode *inode,
93 struct extent_state *orig, u64 split);
d1310b2e
CM		 94};
95
96struct extent_io_tree {
97 struct rb_root state;
98 struct address_space *mapping;
99 u64 dirty_bytes;
0b32f4bb 100 int track_uptodate;
70dec807 101 spinlock_t lock;
e8c9f186 102 const struct extent_io_ops *ops;
d1310b2e
CM		 103};
104
105struct extent_state {
106 u64 start;
107 u64 end; /* inclusive */
d1310b2e 108 struct rb_node rb_node;
9ed74f2d
JB		 109
110 /* ADD NEW ELEMENTS AFTER THIS */
d1310b2e
CM		 111 wait_queue_head_t wq;
112 atomic_t refs;
9ee49a04 113 unsigned state;
d1310b2e
CM		 114
115 /* for use by the FS */
116 u64 private;
117
6d49ba1b 118#ifdef CONFIG_BTRFS_DEBUG
2d2ae547 119 struct list_head leak_list;
6d49ba1b 120#endif
d1310b2e
CM		 121};
122
727011e0
CM		 123#define INLINE_EXTENT_BUFFER_PAGES 16
124#define MAX_INLINE_EXTENT_BUFFER_SIZE (INLINE_EXTENT_BUFFER_PAGES * PAGE_CACHE_SIZE)
d1310b2e
CM		 125struct extent_buffer {
126 u64 start;
127 unsigned long len;
b4ce94de 128 unsigned long bflags;
f28491e0 129 struct btrfs_fs_info *fs_info;
3083ee2e 130 spinlock_t refs_lock;
727011e0 131 atomic_t refs;
0b32f4bb 132 atomic_t io_pages;
5cf1ab56 133 int read_mirror;
19fe0a8b 134 struct rcu_head rcu_head;
5b25f70f 135 pid_t lock_owner;
b4ce94de 136
bd681513
CM		 137 /* count of read lock holders on the extent buffer */
138 atomic_t write_locks;
139 atomic_t read_locks;
140 atomic_t blocking_writers;
141 atomic_t blocking_readers;
142 atomic_t spinning_readers;
143 atomic_t spinning_writers;
656f30db
FM		 144 short lock_nested;
145 /* >= 0 if eb belongs to a log tree, -1 otherwise */
146 short log_index;
bd681513
CM		 147
148 /* protects write locks */
149 rwlock_t lock;
150
151 /* readers use lock_wq while they wait for the write
152 * lock holders to unlock
153 */
154 wait_queue_head_t write_lock_wq;
b4ce94de 155
bd681513
CM		 156 /* writers use read_lock_wq while they wait for readers
157 * to unlock
b4ce94de 158 */
bd681513 159 wait_queue_head_t read_lock_wq;
b8dae313 160 struct page *pages[INLINE_EXTENT_BUFFER_PAGES];
6d49ba1b
ES		 161#ifdef CONFIG_BTRFS_DEBUG
162 struct list_head leak_list;
163#endif
d1310b2e
CM		 164};
165
ac467772
QW		 166/*
167 * Structure to record how many bytes and which ranges are set/cleared
168 */
169struct extent_changeset {
170 /* How many bytes are set/cleared in this operation */
171 u64 bytes_changed;
172
173 /* Changed ranges */
174 struct ulist *range_changed;
175};
176
261507a0
LZ		 177static inline void extent_set_compress_type(unsigned long *bio_flags,
178 int compress_type)
179{
180 *bio_flags |= compress_type << EXTENT_BIO_FLAG_SHIFT;
181}
182
183static inline int extent_compress_type(unsigned long bio_flags)
184{
185 return bio_flags >> EXTENT_BIO_FLAG_SHIFT;
186}
187
d1310b2e
CM		 188struct extent_map_tree;
189
190typedef struct extent_map *(get_extent_t)(struct inode *inode,
191 struct page *page,
306e16ce 192 size_t pg_offset,
d1310b2e
CM		 193 u64 start, u64 len,
194 int create);
195
196void extent_io_tree_init(struct extent_io_tree *tree,
f993c883 197 struct address_space *mapping);
d1310b2e 198int try_release_extent_mapping(struct extent_map_tree *map,
70dec807
CM		 199 struct extent_io_tree *tree, struct page *page,
200 gfp_t mask);
f7a52a40 201int try_release_extent_buffer(struct page *page);
d0082371 202int lock_extent(struct extent_io_tree *tree, u64 start, u64 end);
1edbb734 203int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
9ee49a04 204 unsigned bits, struct extent_state **cached);
d0082371 205int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end);
d1310b2e 206int extent_read_full_page(struct extent_io_tree *tree, struct page *page,
8ddc7d9c 207 get_extent_t *get_extent, int mirror_num);
4b384318
MF		 208int extent_read_full_page_nolock(struct extent_io_tree *tree, struct page *page,
209 get_extent_t *get_extent, int mirror_num);
d1310b2e
CM		 210int __init extent_io_init(void);
211void extent_io_exit(void);
212
213u64 count_range_bits(struct extent_io_tree *tree,
214 u64 *start, u64 search_end,
9ee49a04 215 u64 max_bytes, unsigned bits, int contig);
d1310b2e 216
4845e44f 217void free_extent_state(struct extent_state *state);
d1310b2e 218int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
9ee49a04 219 unsigned bits, int filled,
41074888 220 struct extent_state *cached_state);
fefdc557
QW		 221int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
222 unsigned bits, gfp_t mask,
223 struct extent_changeset *changeset);
e6dcd2dc 224int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
9ee49a04 225 unsigned bits, int wake, int delete,
41074888 226 struct extent_state **cached, gfp_t mask);
c6317955 227
e83b1d91
DS		 228static inline int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end)
229{
230 return clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, NULL,
231 GFP_NOFS);
232}
233
234static inline int unlock_extent_cached(struct extent_io_tree *tree, u64 start,
235 u64 end, struct extent_state **cached, gfp_t mask)
236{
237 return clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, cached,
238 mask);
239}
240
241static inline int clear_extent_bits(struct extent_io_tree *tree, u64 start,
242 u64 end, unsigned bits, gfp_t mask)
243{
244 int wake = 0;
245
246 if (bits & EXTENT_LOCKED)
247 wake = 1;
248
249 return clear_extent_bit(tree, start, end, bits, wake, 0, NULL, mask);
250}
251
d38ed27f
QW		 252int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
253 unsigned bits, gfp_t mask,
254 struct extent_changeset *changeset);
4845e44f 255int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
9ee49a04 256 unsigned bits, u64 *failed_start,
4845e44f 257 struct extent_state **cached_state, gfp_t mask);
c6317955
DS		 258
259static inline int set_extent_bits(struct extent_io_tree *tree, u64 start,
260 u64 end, unsigned bits, gfp_t mask)
261{
262 return set_extent_bit(tree, start, end, bits, NULL, NULL, mask);
263}
264
e83b1d91
DS		 265static inline int clear_extent_uptodate(struct extent_io_tree *tree, u64 start,
266 u64 end, struct extent_state **cached_state, gfp_t mask)
267{
268 return clear_extent_bit(tree, start, end, EXTENT_UPTODATE, 0, 0,
269 cached_state, mask);
270}
c6317955
DS		 271
272static inline int set_extent_dirty(struct extent_io_tree *tree, u64 start,
273 u64 end, gfp_t mask)
274{
275 return set_extent_bit(tree, start, end, EXTENT_DIRTY, NULL,
276 NULL, mask);
277}
278
e83b1d91
DS		 279static inline int clear_extent_dirty(struct extent_io_tree *tree, u64 start,
280 u64 end, gfp_t mask)
281{
282 return clear_extent_bit(tree, start, end,
283 EXTENT_DIRTY | EXTENT_DELALLOC |
284 EXTENT_DO_ACCOUNTING, 0, 0, NULL, mask);
285}
286
462d6fac 287int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
9ee49a04 288 unsigned bits, unsigned clear_bits,
e6138876 289 struct extent_state **cached_state, gfp_t mask);
c6317955
DS		 290
291static inline int set_extent_delalloc(struct extent_io_tree *tree, u64 start,
292 u64 end, struct extent_state **cached_state, gfp_t mask)
293{
294 return set_extent_bit(tree, start, end,
295 EXTENT_DELALLOC | EXTENT_UPTODATE,
296 NULL, cached_state, mask);
297}
298
299static inline int set_extent_defrag(struct extent_io_tree *tree, u64 start,
300 u64 end, struct extent_state **cached_state, gfp_t mask)
301{
302 return set_extent_bit(tree, start, end,
303 EXTENT_DELALLOC | EXTENT_UPTODATE | EXTENT_DEFRAG,
304 NULL, cached_state, mask);
305}
306
307static inline int set_extent_new(struct extent_io_tree *tree, u64 start,
308 u64 end, gfp_t mask)
309{
310 return set_extent_bit(tree, start, end, EXTENT_NEW, NULL, NULL, mask);
311}
312
313static inline int set_extent_uptodate(struct extent_io_tree *tree, u64 start,
314 u64 end, struct extent_state **cached_state, gfp_t mask)
315{
316 return set_extent_bit(tree, start, end, EXTENT_UPTODATE, NULL,
317 cached_state, mask);
318}
319
d1310b2e 320int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
9ee49a04 321 u64 *start_ret, u64 *end_ret, unsigned bits,
e6138876 322 struct extent_state **cached_state);
d1310b2e
CM		 323int extent_invalidatepage(struct extent_io_tree *tree,
324 struct page *page, unsigned long offset);
325int extent_write_full_page(struct extent_io_tree *tree, struct page *page,
326 get_extent_t *get_extent,
327 struct writeback_control *wbc);
771ed689
CM		 328int extent_write_locked_range(struct extent_io_tree *tree, struct inode *inode,
329 u64 start, u64 end, get_extent_t *get_extent,
330 int mode);
d1310b2e
CM		 331int extent_writepages(struct extent_io_tree *tree,
332 struct address_space *mapping,
333 get_extent_t *get_extent,
334 struct writeback_control *wbc);
0b32f4bb
JB		 335int btree_write_cache_pages(struct address_space *mapping,
336 struct writeback_control *wbc);
d1310b2e
CM		 337int extent_readpages(struct extent_io_tree *tree,
338 struct address_space *mapping,
339 struct list_head *pages, unsigned nr_pages,
340 get_extent_t get_extent);
1506fcc8
YS		 341int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
342 __u64 start, __u64 len, get_extent_t *get_extent);
d1310b2e
CM		 343int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private);
344void set_page_extent_mapped(struct page *page);
345
f28491e0 346struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info,
ce3e6984 347 u64 start);
3f556f78
DS		 348struct extent_buffer *alloc_dummy_extent_buffer(struct btrfs_fs_info *fs_info,
349 u64 start);
815a51c7 350struct extent_buffer *btrfs_clone_extent_buffer(struct extent_buffer *src);
f28491e0 351struct extent_buffer *find_extent_buffer(struct btrfs_fs_info *fs_info,
452c75c3 352 u64 start);
d1310b2e 353void free_extent_buffer(struct extent_buffer *eb);
3083ee2e 354void free_extent_buffer_stale(struct extent_buffer *eb);
bb82ab88
AJ		 355#define WAIT_NONE 0
356#define WAIT_COMPLETE 1
357#define WAIT_PAGE_LOCK 2
d1310b2e 358int read_extent_buffer_pages(struct extent_io_tree *tree,
a86c12c7 359 struct extent_buffer *eb, u64 start, int wait,
f188591e 360 get_extent_t *get_extent, int mirror_num);
fd8b2b61 361void wait_on_extent_buffer_writeback(struct extent_buffer *eb);
479ed9ab
RD		 362
363static inline unsigned long num_extent_pages(u64 start, u64 len)
364{
365 return ((start + len + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT) -
366 (start >> PAGE_CACHE_SHIFT);
367}
368
d1310b2e
CM		 369static inline void extent_buffer_get(struct extent_buffer *eb)
370{
371 atomic_inc(&eb->refs);
372}
373
374int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv,
375 unsigned long start,
376 unsigned long len);
377void read_extent_buffer(struct extent_buffer *eb, void *dst,
378 unsigned long start,
379 unsigned long len);
550ac1d8
GH		 380int read_extent_buffer_to_user(struct extent_buffer *eb, void __user *dst,
381 unsigned long start,
382 unsigned long len);
d1310b2e
CM		 383void write_extent_buffer(struct extent_buffer *eb, const void *src,
384 unsigned long start, unsigned long len);
385void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src,
386 unsigned long dst_offset, unsigned long src_offset,
387 unsigned long len);
388void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
389 unsigned long src_offset, unsigned long len);
390void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
391 unsigned long src_offset, unsigned long len);
392void memset_extent_buffer(struct extent_buffer *eb, char c,
393 unsigned long start, unsigned long len);
1d4284bd 394void clear_extent_buffer_dirty(struct extent_buffer *eb);
0b32f4bb
JB		 395int set_extent_buffer_dirty(struct extent_buffer *eb);
396int set_extent_buffer_uptodate(struct extent_buffer *eb);
397int clear_extent_buffer_uptodate(struct extent_buffer *eb);
398int extent_buffer_uptodate(struct extent_buffer *eb);
a26e8c9f 399int extent_buffer_under_io(struct extent_buffer *eb);
d1310b2e 400int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset,
a6591715 401 unsigned long min_len, char **map,
d1310b2e 402 unsigned long *map_start,
a6591715 403 unsigned long *map_len);
4adaa611
CM		 404int extent_range_clear_dirty_for_io(struct inode *inode, u64 start, u64 end);
405int extent_range_redirty_for_io(struct inode *inode, u64 start, u64 end);
c2790a2e
JB		 406int extent_clear_unlock_delalloc(struct inode *inode, u64 start, u64 end,
407 struct page *locked_page,
9ee49a04 408 unsigned bits_to_clear,
c2790a2e 409 unsigned long page_ops);
88f794ed
MX		 410struct bio *
411btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs,
412 gfp_t gfp_flags);
9be3395b
CM		 413struct bio *btrfs_io_bio_alloc(gfp_t gfp_mask, unsigned int nr_iovecs);
414struct bio *btrfs_bio_clone(struct bio *bio, gfp_t gfp_mask);
4a54c8c1 415
3ec706c8 416struct btrfs_fs_info;
4a54c8c1 417
1203b681
MX		 418int repair_io_failure(struct inode *inode, u64 start, u64 length, u64 logical,
419 struct page *page, unsigned int pg_offset,
420 int mirror_num);
8b110e39
MX		 421int clean_io_failure(struct inode *inode, u64 start, struct page *page,
422 unsigned int pg_offset);
87826df0 423int end_extent_writepage(struct page *page, int err, u64 start, u64 end);
ea466794
JB		 424int repair_eb_io_failure(struct btrfs_root *root, struct extent_buffer *eb,
425 int mirror_num);
2fe6303e
MX		 426
427/*
428 * When IO fails, either with EIO or csum verification fails, we
429 * try other mirrors that might have a good copy of the data. This
430 * io_failure_record is used to record state as we go through all the
431 * mirrors. If another mirror has good data, the page is set up to date
432 * and things continue. If a good mirror can't be found, the original
433 * bio end_io callback is called to indicate things have failed.
434 */
435struct io_failure_record {
436 struct page *page;
437 u64 start;
438 u64 len;
439 u64 logical;
440 unsigned long bio_flags;
441 int this_mirror;
442 int failed_mirror;
443 int in_validation;
444};
445
f612496b 446void btrfs_free_io_failure_record(struct inode *inode, u64 start, u64 end);
2fe6303e
MX		 447int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end,
448 struct io_failure_record **failrec_ret);
449int btrfs_check_repairable(struct inode *inode, struct bio *failed_bio,
450 struct io_failure_record *failrec, int fail_mirror);
451struct bio *btrfs_create_repair_bio(struct inode *inode, struct bio *failed_bio,
452 struct io_failure_record *failrec,
453 struct page *page, int pg_offset, int icsum,
8b110e39
MX		 454 bio_end_io_t *endio_func, void *data);
455int free_io_failure(struct inode *inode, struct io_failure_record *rec);
294e30fe
JB		 456#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
457noinline u64 find_lock_delalloc_range(struct inode *inode,
458 struct extent_io_tree *tree,
459 struct page *locked_page, u64 *start,
460 u64 *end, u64 max_bytes);
0d4cf4e6 461#endif
faa2dbf0 462struct extent_buffer *alloc_test_extent_buffer(struct btrfs_fs_info *fs_info,
ce3e6984 463 u64 start);
294e30fe 464#endif
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