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drm/vc4: mark vc4_bo_cache_purge() static
[linux-2.6-block.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
261507a0 32#define EXTENT_BIO_FLAG_SHIFT 16
c8b97818 33
b4ce94de
CM		 34/* these are bit numbers for test/set bit */
35#define EXTENT_BUFFER_UPTODATE 0
b9473439 36#define EXTENT_BUFFER_DIRTY 2
a826d6dc 37#define EXTENT_BUFFER_CORRUPT 3
ab0fff03 38#define EXTENT_BUFFER_READAHEAD 4 /* this got triggered by readahead */
3083ee2e
JB		 39#define EXTENT_BUFFER_TREE_REF 5
40#define EXTENT_BUFFER_STALE 6
0b32f4bb 41#define EXTENT_BUFFER_WRITEBACK 7
656f30db 42#define EXTENT_BUFFER_READ_ERR 8 /* read IO error */
815a51c7 43#define EXTENT_BUFFER_DUMMY 9
34b41ace 44#define EXTENT_BUFFER_IN_TREE 10
656f30db 45#define EXTENT_BUFFER_WRITE_ERR 11 /* write IO error */
b4ce94de 46
a791e35e 47/* these are flags for extent_clear_unlock_delalloc */
c2790a2e
JB		 48#define PAGE_UNLOCK (1 << 0)
49#define PAGE_CLEAR_DIRTY (1 << 1)
50#define PAGE_SET_WRITEBACK (1 << 2)
51#define PAGE_END_WRITEBACK (1 << 3)
52#define PAGE_SET_PRIVATE2 (1 << 4)
704de49d 53#define PAGE_SET_ERROR (1 << 5)
a791e35e 54
d1310b2e
CM		 55/*
56 * page->private values. Every page that is controlled by the extent
57 * map has page->private set to one.
58 */
59#define EXTENT_PAGE_PRIVATE 1
d1310b2e 60
70dec807 61struct extent_state;
ea466794 62struct btrfs_root;
facc8a22 63struct btrfs_io_bio;
47dc196a 64struct io_failure_record;
70dec807 65
81a75f67
MC		 66typedef int (extent_submit_bio_hook_t)(struct inode *inode, struct bio *bio,
67 int mirror_num, unsigned long bio_flags,
68 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);
44b8bd7e 74 extent_submit_bio_hook_t *submit_bio_hook;
81a75f67 75 int (*merge_bio_hook)(struct page *page, unsigned long offset,
c8b97818
CM		 76 size_t size, struct bio *bio,
77 unsigned long bio_flags);
ea466794 78 int (*readpage_io_failed_hook)(struct page *page, int failed_mirror);
facc8a22
MX		 79 int (*readpage_end_io_hook)(struct btrfs_io_bio *io_bio, u64 phy_offset,
80 struct page *page, u64 start, u64 end,
81 int mirror);
1259ab75 82 int (*writepage_end_io_hook)(struct page *page, u64 start, u64 end,
e6dcd2dc 83 struct extent_state *state, int uptodate);
1bf85046 84 void (*set_bit_hook)(struct inode *inode, struct extent_state *state,
9ee49a04 85 unsigned *bits);
1bf85046 86 void (*clear_bit_hook)(struct inode *inode, struct extent_state *state,
9ee49a04 87 unsigned *bits);
1bf85046
JM		 88 void (*merge_extent_hook)(struct inode *inode,
89 struct extent_state *new,
90 struct extent_state *other);
91 void (*split_extent_hook)(struct inode *inode,
92 struct extent_state *orig, u64 split);
d1310b2e
CM		 93};
94
95struct extent_io_tree {
96 struct rb_root state;
97 struct address_space *mapping;
98 u64 dirty_bytes;
0b32f4bb 99 int track_uptodate;
70dec807 100 spinlock_t lock;
e8c9f186 101 const struct extent_io_ops *ops;
d1310b2e
CM		 102};
103
104struct extent_state {
105 u64 start;
106 u64 end; /* inclusive */
d1310b2e 107 struct rb_node rb_node;
9ed74f2d
JB		 108
109 /* ADD NEW ELEMENTS AFTER THIS */
d1310b2e
CM		 110 wait_queue_head_t wq;
111 atomic_t refs;
9ee49a04 112 unsigned state;
d1310b2e 113
47dc196a 114 struct io_failure_record *failrec;
d1310b2e 115
6d49ba1b 116#ifdef CONFIG_BTRFS_DEBUG
2d2ae547 117 struct list_head leak_list;
6d49ba1b 118#endif
d1310b2e
CM		 119};
120
727011e0 121#define INLINE_EXTENT_BUFFER_PAGES 16
09cbfeaf 122#define MAX_INLINE_EXTENT_BUFFER_SIZE (INLINE_EXTENT_BUFFER_PAGES * PAGE_SIZE)
d1310b2e
CM		 123struct extent_buffer {
124 u64 start;
125 unsigned long len;
b4ce94de 126 unsigned long bflags;
f28491e0 127 struct btrfs_fs_info *fs_info;
3083ee2e 128 spinlock_t refs_lock;
727011e0 129 atomic_t refs;
0b32f4bb 130 atomic_t io_pages;
5cf1ab56 131 int read_mirror;
19fe0a8b 132 struct rcu_head rcu_head;
5b25f70f 133 pid_t lock_owner;
b4ce94de 134
bd681513
CM		 135 /* count of read lock holders on the extent buffer */
136 atomic_t write_locks;
137 atomic_t read_locks;
138 atomic_t blocking_writers;
139 atomic_t blocking_readers;
140 atomic_t spinning_readers;
141 atomic_t spinning_writers;
656f30db
FM		 142 short lock_nested;
143 /* >= 0 if eb belongs to a log tree, -1 otherwise */
144 short log_index;
bd681513
CM		 145
146 /* protects write locks */
147 rwlock_t lock;
148
149 /* readers use lock_wq while they wait for the write
150 * lock holders to unlock
151 */
152 wait_queue_head_t write_lock_wq;
b4ce94de 153
bd681513
CM		 154 /* writers use read_lock_wq while they wait for readers
155 * to unlock
b4ce94de 156 */
bd681513 157 wait_queue_head_t read_lock_wq;
b8dae313 158 struct page *pages[INLINE_EXTENT_BUFFER_PAGES];
6d49ba1b
ES		 159#ifdef CONFIG_BTRFS_DEBUG
160 struct list_head leak_list;
161#endif
d1310b2e
CM		 162};
163
ac467772
QW		 164/*
165 * Structure to record how many bytes and which ranges are set/cleared
166 */
167struct extent_changeset {
168 /* How many bytes are set/cleared in this operation */
169 u64 bytes_changed;
170
171 /* Changed ranges */
172 struct ulist *range_changed;
173};
174
261507a0
LZ		 175static inline void extent_set_compress_type(unsigned long *bio_flags,
176 int compress_type)
177{
178 *bio_flags |= compress_type << EXTENT_BIO_FLAG_SHIFT;
179}
180
181static inline int extent_compress_type(unsigned long bio_flags)
182{
183 return bio_flags >> EXTENT_BIO_FLAG_SHIFT;
184}
185
d1310b2e
CM		 186struct extent_map_tree;
187
188typedef struct extent_map *(get_extent_t)(struct inode *inode,
189 struct page *page,
306e16ce 190 size_t pg_offset,
d1310b2e
CM		 191 u64 start, u64 len,
192 int create);
193
194void extent_io_tree_init(struct extent_io_tree *tree,
f993c883 195 struct address_space *mapping);
d1310b2e 196int try_release_extent_mapping(struct extent_map_tree *map,
70dec807
CM		 197 struct extent_io_tree *tree, struct page *page,
198 gfp_t mask);
f7a52a40 199int try_release_extent_buffer(struct page *page);
1edbb734 200int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
ff13db41 201 struct extent_state **cached);
cd716d8f
DS		 202
203static inline int lock_extent(struct extent_io_tree *tree, u64 start, u64 end)
204{
205 return lock_extent_bits(tree, start, end, NULL);
206}
207
d0082371 208int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end);
d1310b2e 209int extent_read_full_page(struct extent_io_tree *tree, struct page *page,
8ddc7d9c 210 get_extent_t *get_extent, int mirror_num);
d1310b2e
CM		 211int __init extent_io_init(void);
212void extent_io_exit(void);
213
214u64 count_range_bits(struct extent_io_tree *tree,
215 u64 *start, u64 search_end,
9ee49a04 216 u64 max_bytes, unsigned bits, int contig);
d1310b2e 217
4845e44f 218void free_extent_state(struct extent_state *state);
d1310b2e 219int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
9ee49a04 220 unsigned bits, int filled,
41074888 221 struct extent_state *cached_state);
fefdc557 222int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
f734c44a 223 unsigned bits, 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,
91166212 242 u64 end, unsigned bits)
e83b1d91
DS		 243{
244 int wake = 0;
245
246 if (bits & EXTENT_LOCKED)
247 wake = 1;
248
91166212
DS		 249 return clear_extent_bit(tree, start, end, bits, wake, 0, NULL,
250 GFP_NOFS);
e83b1d91
DS		 251}
252
d38ed27f 253int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
2c53b912 254 unsigned bits, 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,
ceeb0ae7 260 u64 end, unsigned bits)
c6317955 261{
ceeb0ae7 262 return set_extent_bit(tree, start, end, bits, NULL, NULL, GFP_NOFS);
c6317955
DS		 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 279static inline int clear_extent_dirty(struct extent_io_tree *tree, u64 start,
af6f8f60 280 u64 end)
e83b1d91
DS		 281{
282 return clear_extent_bit(tree, start, end,
283 EXTENT_DIRTY | EXTENT_DELALLOC |
af6f8f60 284 EXTENT_DO_ACCOUNTING, 0, 0, NULL, GFP_NOFS);
e83b1d91
DS		 285}
286
462d6fac 287int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
9ee49a04 288 unsigned bits, unsigned clear_bits,
210aa277 289 struct extent_state **cached_state);
c6317955
DS		 290
291static inline int set_extent_delalloc(struct extent_io_tree *tree, u64 start,
7cd8c752 292 u64 end, struct extent_state **cached_state)
c6317955
DS		 293{
294 return set_extent_bit(tree, start, end,
295 EXTENT_DELALLOC | EXTENT_UPTODATE,
7cd8c752 296 NULL, cached_state, GFP_NOFS);
c6317955
DS		 297}
298
299static inline int set_extent_defrag(struct extent_io_tree *tree, u64 start,
018ed4f7 300 u64 end, struct extent_state **cached_state)
c6317955
DS		 301{
302 return set_extent_bit(tree, start, end,
303 EXTENT_DELALLOC | EXTENT_UPTODATE | EXTENT_DEFRAG,
018ed4f7 304 NULL, cached_state, GFP_NOFS);
c6317955
DS		 305}
306
307static inline int set_extent_new(struct extent_io_tree *tree, u64 start,
3744dbeb 308 u64 end)
c6317955 309{
3744dbeb
DS		 310 return set_extent_bit(tree, start, end, EXTENT_NEW, NULL, NULL,
311 GFP_NOFS);
c6317955
DS		 312}
313
314static inline int set_extent_uptodate(struct extent_io_tree *tree, u64 start,
315 u64 end, struct extent_state **cached_state, gfp_t mask)
316{
317 return set_extent_bit(tree, start, end, EXTENT_UPTODATE, NULL,
318 cached_state, mask);
319}
320
d1310b2e 321int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
9ee49a04 322 u64 *start_ret, u64 *end_ret, unsigned bits,
e6138876 323 struct extent_state **cached_state);
d1310b2e
CM		 324int extent_invalidatepage(struct extent_io_tree *tree,
325 struct page *page, unsigned long offset);
326int extent_write_full_page(struct extent_io_tree *tree, struct page *page,
327 get_extent_t *get_extent,
328 struct writeback_control *wbc);
771ed689
CM		 329int extent_write_locked_range(struct extent_io_tree *tree, struct inode *inode,
330 u64 start, u64 end, get_extent_t *get_extent,
331 int mode);
d1310b2e
CM		 332int extent_writepages(struct extent_io_tree *tree,
333 struct address_space *mapping,
334 get_extent_t *get_extent,
335 struct writeback_control *wbc);
0b32f4bb
JB		 336int btree_write_cache_pages(struct address_space *mapping,
337 struct writeback_control *wbc);
d1310b2e
CM		 338int extent_readpages(struct extent_io_tree *tree,
339 struct address_space *mapping,
340 struct list_head *pages, unsigned nr_pages,
341 get_extent_t get_extent);
1506fcc8
YS		 342int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
343 __u64 start, __u64 len, get_extent_t *get_extent);
d1310b2e
CM		 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);
0f331229
OS		 348struct extent_buffer *__alloc_dummy_extent_buffer(struct btrfs_fs_info *fs_info,
349 u64 start, unsigned long len);
3f556f78 350struct extent_buffer *alloc_dummy_extent_buffer(struct btrfs_fs_info *fs_info,
b9ef22de 351 u64 start, u32 nodesize);
815a51c7 352struct extent_buffer *btrfs_clone_extent_buffer(struct extent_buffer *src);
f28491e0 353struct extent_buffer *find_extent_buffer(struct btrfs_fs_info *fs_info,
452c75c3 354 u64 start);
d1310b2e 355void free_extent_buffer(struct extent_buffer *eb);
3083ee2e 356void free_extent_buffer_stale(struct extent_buffer *eb);
bb82ab88
AJ		 357#define WAIT_NONE 0
358#define WAIT_COMPLETE 1
359#define WAIT_PAGE_LOCK 2
d1310b2e 360int read_extent_buffer_pages(struct extent_io_tree *tree,
a86c12c7 361 struct extent_buffer *eb, u64 start, int wait,
f188591e 362 get_extent_t *get_extent, int mirror_num);
fd8b2b61 363void wait_on_extent_buffer_writeback(struct extent_buffer *eb);
479ed9ab
RD		 364
365static inline unsigned long num_extent_pages(u64 start, u64 len)
366{
09cbfeaf
KS		 367 return ((start + len + PAGE_SIZE - 1) >> PAGE_SHIFT) -
368 (start >> PAGE_SHIFT);
479ed9ab
RD		 369}
370
d1310b2e
CM		 371static inline void extent_buffer_get(struct extent_buffer *eb)
372{
373 atomic_inc(&eb->refs);
374}
375
376int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv,
377 unsigned long start,
378 unsigned long len);
379void read_extent_buffer(struct extent_buffer *eb, void *dst,
380 unsigned long start,
381 unsigned long len);
550ac1d8
GH		 382int read_extent_buffer_to_user(struct extent_buffer *eb, void __user *dst,
383 unsigned long start,
384 unsigned long len);
d1310b2e
CM		 385void write_extent_buffer(struct extent_buffer *eb, const void *src,
386 unsigned long start, unsigned long len);
387void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src,
388 unsigned long dst_offset, unsigned long src_offset,
389 unsigned long len);
390void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
391 unsigned long src_offset, unsigned long len);
392void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
393 unsigned long src_offset, unsigned long len);
394void memset_extent_buffer(struct extent_buffer *eb, char c,
395 unsigned long start, unsigned long len);
3e1e8bb7
OS		 396int extent_buffer_test_bit(struct extent_buffer *eb, unsigned long start,
397 unsigned long pos);
398void extent_buffer_bitmap_set(struct extent_buffer *eb, unsigned long start,
399 unsigned long pos, unsigned long len);
400void extent_buffer_bitmap_clear(struct extent_buffer *eb, unsigned long start,
401 unsigned long pos, unsigned long len);
1d4284bd 402void clear_extent_buffer_dirty(struct extent_buffer *eb);
0b32f4bb 403int set_extent_buffer_dirty(struct extent_buffer *eb);
09c25a8c 404void set_extent_buffer_uptodate(struct extent_buffer *eb);
69ba3927 405void clear_extent_buffer_uptodate(struct extent_buffer *eb);
0b32f4bb 406int extent_buffer_uptodate(struct extent_buffer *eb);
a26e8c9f 407int extent_buffer_under_io(struct extent_buffer *eb);
d1310b2e 408int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset,
a6591715 409 unsigned long min_len, char **map,
d1310b2e 410 unsigned long *map_start,
a6591715 411 unsigned long *map_len);
bd1fa4f0 412void extent_range_clear_dirty_for_io(struct inode *inode, u64 start, u64 end);
f6311572 413void extent_range_redirty_for_io(struct inode *inode, u64 start, u64 end);
a9d93e17 414void extent_clear_unlock_delalloc(struct inode *inode, u64 start, u64 end,
c2790a2e 415 struct page *locked_page,
9ee49a04 416 unsigned bits_to_clear,
c2790a2e 417 unsigned long page_ops);
88f794ed
MX		 418struct bio *
419btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs,
420 gfp_t gfp_flags);
9be3395b
CM		 421struct bio *btrfs_io_bio_alloc(gfp_t gfp_mask, unsigned int nr_iovecs);
422struct bio *btrfs_bio_clone(struct bio *bio, gfp_t gfp_mask);
4a54c8c1 423
3ec706c8 424struct btrfs_fs_info;
4a54c8c1 425
1203b681
MX		 426int repair_io_failure(struct inode *inode, u64 start, u64 length, u64 logical,
427 struct page *page, unsigned int pg_offset,
428 int mirror_num);
8b110e39
MX		 429int clean_io_failure(struct inode *inode, u64 start, struct page *page,
430 unsigned int pg_offset);
b5227c07 431void end_extent_writepage(struct page *page, int err, u64 start, u64 end);
ea466794
JB		 432int repair_eb_io_failure(struct btrfs_root *root, struct extent_buffer *eb,
433 int mirror_num);
2fe6303e
MX		 434
435/*
436 * When IO fails, either with EIO or csum verification fails, we
437 * try other mirrors that might have a good copy of the data. This
438 * io_failure_record is used to record state as we go through all the
439 * mirrors. If another mirror has good data, the page is set up to date
440 * and things continue. If a good mirror can't be found, the original
441 * bio end_io callback is called to indicate things have failed.
442 */
443struct io_failure_record {
444 struct page *page;
445 u64 start;
446 u64 len;
447 u64 logical;
448 unsigned long bio_flags;
449 int this_mirror;
450 int failed_mirror;
451 int in_validation;
452};
453
f612496b 454void btrfs_free_io_failure_record(struct inode *inode, u64 start, u64 end);
2fe6303e
MX		 455int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end,
456 struct io_failure_record **failrec_ret);
457int btrfs_check_repairable(struct inode *inode, struct bio *failed_bio,
458 struct io_failure_record *failrec, int fail_mirror);
459struct bio *btrfs_create_repair_bio(struct inode *inode, struct bio *failed_bio,
460 struct io_failure_record *failrec,
461 struct page *page, int pg_offset, int icsum,
8b110e39
MX		 462 bio_end_io_t *endio_func, void *data);
463int free_io_failure(struct inode *inode, struct io_failure_record *rec);
294e30fe
JB		 464#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
465noinline u64 find_lock_delalloc_range(struct inode *inode,
466 struct extent_io_tree *tree,
467 struct page *locked_page, u64 *start,
468 u64 *end, u64 max_bytes);
0d4cf4e6 469#endif
faa2dbf0 470struct extent_buffer *alloc_test_extent_buffer(struct btrfs_fs_info *fs_info,
b9ef22de 471 u64 start, u32 nodesize);
294e30fe 472#endif
Linux 6.x block layer and io_uring tree(s)