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Chris Masond1310b22008-01-24 16:13:08 -05001#ifndef __EXTENTIO__
2#define __EXTENTIO__
3
4#include <linux/rbtree.h>
5
6/* bits for the extent state */
7#define EXTENT_DIRTY 1
8#define EXTENT_WRITEBACK (1 << 1)
9#define EXTENT_UPTODATE (1 << 2)
10#define EXTENT_LOCKED (1 << 3)
11#define EXTENT_NEW (1 << 4)
12#define EXTENT_DELALLOC (1 << 5)
13#define EXTENT_DEFRAG (1 << 6)
14#define EXTENT_DEFRAG_DONE (1 << 7)
15#define EXTENT_BUFFER_FILLED (1 << 8)
Chris Mason8b62b722009-09-02 16:53:46 -040016#define EXTENT_BOUNDARY (1 << 9)
17#define EXTENT_NODATASUM (1 << 10)
Josef Bacik32c00af2009-10-08 13:34:05 -040018#define EXTENT_DO_ACCOUNTING (1 << 11)
Yan, Zheng0ca1f7c2010-05-16 10:48:47 -040019#define EXTENT_FIRST_DELALLOC (1 << 12)
Josef Bacik17283662011-09-26 13:58:47 -040020#define EXTENT_NEED_WAIT (1 << 13)
Chris Mason806468f2011-11-06 03:07:10 -050021#define EXTENT_DAMAGED (1 << 14)
Josef Bacik7ee9e442013-06-21 16:37:03 -040022#define EXTENT_NORESERVE (1 << 15)
Chris Masond1310b22008-01-24 16:13:08 -050023#define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK)
Yan, Zheng0ca1f7c2010-05-16 10:48:47 -040024#define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING | EXTENT_FIRST_DELALLOC)
Chris Masond1310b22008-01-24 16:13:08 -050025
Li Zefan261507a02010-12-17 14:21:50 +080026/*
27 * flags for bio submission. The high bits indicate the compression
28 * type for this bio
29 */
Chris Masonc8b97812008-10-29 14:49:59 -040030#define EXTENT_BIO_COMPRESSED 1
Josef Bacikde0022b2012-09-25 14:25:58 -040031#define EXTENT_BIO_TREE_LOG 2
Mark Fasheh4b384312013-08-06 11:42:50 -070032#define EXTENT_BIO_PARENT_LOCKED 4
Li Zefan261507a02010-12-17 14:21:50 +080033#define EXTENT_BIO_FLAG_SHIFT 16
Chris Masonc8b97812008-10-29 14:49:59 -040034
Chris Masonb4ce94d2009-02-04 09:25:08 -050035/* these are bit numbers for test/set bit */
36#define EXTENT_BUFFER_UPTODATE 0
37#define EXTENT_BUFFER_BLOCKING 1
Chris Masonb9473432009-03-13 11:00:37 -040038#define EXTENT_BUFFER_DIRTY 2
Josef Bacika826d6d2011-03-16 13:42:43 -040039#define EXTENT_BUFFER_CORRUPT 3
Arne Jansenab0fff02011-05-23 14:25:41 +020040#define EXTENT_BUFFER_READAHEAD 4 /* this got triggered by readahead */
Josef Bacik3083ee22012-03-09 16:01:49 -050041#define EXTENT_BUFFER_TREE_REF 5
42#define EXTENT_BUFFER_STALE 6
Josef Bacik0b32f4b2012-03-13 09:38:00 -040043#define EXTENT_BUFFER_WRITEBACK 7
44#define EXTENT_BUFFER_IOERR 8
Jan Schmidt815a51c2012-05-16 17:00:02 +020045#define EXTENT_BUFFER_DUMMY 9
Josef Bacik34b41ac2013-12-13 10:41:51 -050046#define EXTENT_BUFFER_IN_TREE 10
Chris Masonb4ce94d2009-02-04 09:25:08 -050047
Chris Masona791e352009-10-08 11:27:10 -040048/* these are flags for extent_clear_unlock_delalloc */
Josef Bacikc2790a22013-07-29 11:20:47 -040049#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)
Chris Masona791e352009-10-08 11:27:10 -040054
Chris Masond1310b22008-01-24 16:13:08 -050055/*
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
60#define EXTENT_PAGE_PRIVATE_FIRST_PAGE 3
61
Chris Mason70dec802008-01-29 09:59:12 -050062struct extent_state;
Josef Bacikea466792012-03-26 21:57:36 -040063struct btrfs_root;
Miao Xiefacc8a222013-07-25 19:22:34 +080064struct btrfs_io_bio;
Chris Mason70dec802008-01-29 09:59:12 -050065
Chris Mason44b8bd72008-04-16 11:14:51 -040066typedef int (extent_submit_bio_hook_t)(struct inode *inode, int rw,
Chris Masonc8b97812008-10-29 14:49:59 -040067 struct bio *bio, int mirror_num,
Chris Masoneaf25d92010-05-25 09:48:28 -040068 unsigned long bio_flags, u64 bio_offset);
Chris Masond1310b22008-01-24 16:13:08 -050069struct extent_io_ops {
Chris Masonc8b97812008-10-29 14:49:59 -040070 int (*fill_delalloc)(struct inode *inode, struct page *locked_page,
Chris Mason771ed682008-11-06 22:02:51 -050071 u64 start, u64 end, int *page_started,
72 unsigned long *nr_written);
Chris Mason247e7432008-07-17 12:53:51 -040073 int (*writepage_start_hook)(struct page *page, u64 start, u64 end);
Chris Masond1310b22008-01-24 16:13:08 -050074 int (*writepage_io_hook)(struct page *page, u64 start, u64 end);
Chris Mason44b8bd72008-04-16 11:14:51 -040075 extent_submit_bio_hook_t *submit_bio_hook;
David Woodhouse64a16702009-07-15 23:29:37 +010076 int (*merge_bio_hook)(int rw, struct page *page, unsigned long offset,
Chris Masonc8b97812008-10-29 14:49:59 -040077 size_t size, struct bio *bio,
78 unsigned long bio_flags);
Josef Bacikea466792012-03-26 21:57:36 -040079 int (*readpage_io_failed_hook)(struct page *page, int failed_mirror);
Miao Xiefacc8a222013-07-25 19:22:34 +080080 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);
Chris Mason1259ab72008-05-12 13:39:03 -040083 int (*writepage_end_io_hook)(struct page *page, u64 start, u64 end,
Chris Masone6dcd2d2008-07-17 12:53:50 -040084 struct extent_state *state, int uptodate);
Jeff Mahoney1bf85042011-07-21 16:56:09 +000085 void (*set_bit_hook)(struct inode *inode, struct extent_state *state,
David Sterba41074882013-04-29 13:38:46 +000086 unsigned long *bits);
Jeff Mahoney1bf85042011-07-21 16:56:09 +000087 void (*clear_bit_hook)(struct inode *inode, struct extent_state *state,
David Sterba41074882013-04-29 13:38:46 +000088 unsigned long *bits);
Jeff Mahoney1bf85042011-07-21 16:56:09 +000089 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);
Chris Masond1310b22008-01-24 16:13:08 -050094};
95
96struct extent_io_tree {
97 struct rb_root state;
98 struct address_space *mapping;
99 u64 dirty_bytes;
Josef Bacik0b32f4b2012-03-13 09:38:00 -0400100 int track_uptodate;
Chris Mason70dec802008-01-29 09:59:12 -0500101 spinlock_t lock;
Chris Masond1310b22008-01-24 16:13:08 -0500102 struct extent_io_ops *ops;
Chris Masond1310b22008-01-24 16:13:08 -0500103};
104
105struct extent_state {
106 u64 start;
107 u64 end; /* inclusive */
Chris Masond1310b22008-01-24 16:13:08 -0500108 struct rb_node rb_node;
Josef Bacik9ed74f22009-09-11 16:12:44 -0400109
110 /* ADD NEW ELEMENTS AFTER THIS */
Chris Mason70dec802008-01-29 09:59:12 -0500111 struct extent_io_tree *tree;
Chris Masond1310b22008-01-24 16:13:08 -0500112 wait_queue_head_t wq;
113 atomic_t refs;
114 unsigned long state;
115
116 /* for use by the FS */
117 u64 private;
118
Eric Sandeen6d49ba12013-04-22 16:12:31 +0000119#ifdef CONFIG_BTRFS_DEBUG
Chris Mason2d2ae542008-03-26 16:24:23 -0400120 struct list_head leak_list;
Eric Sandeen6d49ba12013-04-22 16:12:31 +0000121#endif
Chris Masond1310b22008-01-24 16:13:08 -0500122};
123
Chris Mason727011e2010-08-06 13:21:20 -0400124#define INLINE_EXTENT_BUFFER_PAGES 16
125#define MAX_INLINE_EXTENT_BUFFER_SIZE (INLINE_EXTENT_BUFFER_PAGES * PAGE_CACHE_SIZE)
Chris Masond1310b22008-01-24 16:13:08 -0500126struct extent_buffer {
127 u64 start;
128 unsigned long len;
Chris Masond1310b22008-01-24 16:13:08 -0500129 unsigned long map_start;
130 unsigned long map_len;
Chris Masonb4ce94d2009-02-04 09:25:08 -0500131 unsigned long bflags;
Josef Bacikf28491e2013-12-16 13:24:27 -0500132 struct btrfs_fs_info *fs_info;
Josef Bacik3083ee22012-03-09 16:01:49 -0500133 spinlock_t refs_lock;
Chris Mason727011e2010-08-06 13:21:20 -0400134 atomic_t refs;
Josef Bacik0b32f4b2012-03-13 09:38:00 -0400135 atomic_t io_pages;
Josef Bacik5cf1ab52012-04-16 09:42:26 -0400136 int read_mirror;
Miao Xie19fe0a82010-10-26 20:57:29 -0400137 struct rcu_head rcu_head;
Arne Jansen5b25f702011-09-13 10:55:48 +0200138 pid_t lock_owner;
Chris Masonb4ce94d2009-02-04 09:25:08 -0500139
Chris Masonbd681512011-07-16 15:23:14 -0400140 /* count of read lock holders on the extent buffer */
141 atomic_t write_locks;
142 atomic_t read_locks;
143 atomic_t blocking_writers;
144 atomic_t blocking_readers;
145 atomic_t spinning_readers;
146 atomic_t spinning_writers;
Arne Jansen5b25f702011-09-13 10:55:48 +0200147 int lock_nested;
Chris Masonb4ce94d2009-02-04 09:25:08 -0500148
Chris Masonbd681512011-07-16 15:23:14 -0400149 /* protects write locks */
150 rwlock_t lock;
151
152 /* readers use lock_wq while they wait for the write
153 * lock holders to unlock
Chris Masonb4ce94d2009-02-04 09:25:08 -0500154 */
Chris Masonbd681512011-07-16 15:23:14 -0400155 wait_queue_head_t write_lock_wq;
156
157 /* writers use read_lock_wq while they wait for readers
158 * to unlock
159 */
160 wait_queue_head_t read_lock_wq;
Chris Mason727011e2010-08-06 13:21:20 -0400161 wait_queue_head_t lock_wq;
David Sterbab8dae312013-02-28 14:54:18 +0000162 struct page *pages[INLINE_EXTENT_BUFFER_PAGES];
Eric Sandeen6d49ba12013-04-22 16:12:31 +0000163#ifdef CONFIG_BTRFS_DEBUG
164 struct list_head leak_list;
165#endif
Chris Masond1310b22008-01-24 16:13:08 -0500166};
167
Li Zefan261507a02010-12-17 14:21:50 +0800168static inline void extent_set_compress_type(unsigned long *bio_flags,
169 int compress_type)
170{
171 *bio_flags |= compress_type << EXTENT_BIO_FLAG_SHIFT;
172}
173
174static inline int extent_compress_type(unsigned long bio_flags)
175{
176 return bio_flags >> EXTENT_BIO_FLAG_SHIFT;
177}
178
Chris Masond1310b22008-01-24 16:13:08 -0500179struct extent_map_tree;
180
181typedef struct extent_map *(get_extent_t)(struct inode *inode,
182 struct page *page,
David Sterba306e16c2011-04-19 14:29:38 +0200183 size_t pg_offset,
Chris Masond1310b22008-01-24 16:13:08 -0500184 u64 start, u64 len,
185 int create);
186
187void extent_io_tree_init(struct extent_io_tree *tree,
David Sterbaf993c882011-04-20 23:35:57 +0200188 struct address_space *mapping);
Chris Masond1310b22008-01-24 16:13:08 -0500189int try_release_extent_mapping(struct extent_map_tree *map,
Chris Mason70dec802008-01-29 09:59:12 -0500190 struct extent_io_tree *tree, struct page *page,
191 gfp_t mask);
David Sterbaf7a52a42013-04-26 14:56:29 +0000192int try_release_extent_buffer(struct page *page);
Jeff Mahoneyd0082372012-03-01 14:57:19 +0100193int lock_extent(struct extent_io_tree *tree, u64 start, u64 end);
Chris Mason1edbb732009-09-02 13:24:36 -0400194int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
David Sterba41074882013-04-29 13:38:46 +0000195 unsigned long bits, struct extent_state **cached);
Jeff Mahoneyd0082372012-03-01 14:57:19 +0100196int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end);
Josef Bacik2ac55d42010-02-03 19:33:23 +0000197int unlock_extent_cached(struct extent_io_tree *tree, u64 start, u64 end,
198 struct extent_state **cached, gfp_t mask);
Jeff Mahoneyd0082372012-03-01 14:57:19 +0100199int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end);
Chris Masond1310b22008-01-24 16:13:08 -0500200int extent_read_full_page(struct extent_io_tree *tree, struct page *page,
Jan Schmidt8ddc7d92011-06-13 20:02:58 +0200201 get_extent_t *get_extent, int mirror_num);
Mark Fasheh4b384312013-08-06 11:42:50 -0700202int extent_read_full_page_nolock(struct extent_io_tree *tree, struct page *page,
203 get_extent_t *get_extent, int mirror_num);
Chris Masond1310b22008-01-24 16:13:08 -0500204int __init extent_io_init(void);
205void extent_io_exit(void);
206
207u64 count_range_bits(struct extent_io_tree *tree,
208 u64 *start, u64 search_end,
Chris Masonec29ed52011-02-23 16:23:20 -0500209 u64 max_bytes, unsigned long bits, int contig);
Chris Masond1310b22008-01-24 16:13:08 -0500210
Chris Mason4845e442010-05-25 20:56:50 -0400211void free_extent_state(struct extent_state *state);
Chris Masond1310b22008-01-24 16:13:08 -0500212int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
David Sterba41074882013-04-29 13:38:46 +0000213 unsigned long bits, int filled,
214 struct extent_state *cached_state);
Chris Masond1310b22008-01-24 16:13:08 -0500215int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
David Sterba41074882013-04-29 13:38:46 +0000216 unsigned long bits, gfp_t mask);
Chris Masone6dcd2d2008-07-17 12:53:50 -0400217int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
David Sterba41074882013-04-29 13:38:46 +0000218 unsigned long bits, int wake, int delete,
219 struct extent_state **cached, gfp_t mask);
Chris Masond1310b22008-01-24 16:13:08 -0500220int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
David Sterba41074882013-04-29 13:38:46 +0000221 unsigned long bits, gfp_t mask);
Chris Mason4845e442010-05-25 20:56:50 -0400222int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
David Sterba41074882013-04-29 13:38:46 +0000223 unsigned long bits, u64 *failed_start,
Chris Mason4845e442010-05-25 20:56:50 -0400224 struct extent_state **cached_state, gfp_t mask);
Chris Masond1310b22008-01-24 16:13:08 -0500225int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end,
Arne Jansen507903b2011-04-06 10:02:20 +0000226 struct extent_state **cached_state, gfp_t mask);
Josef Bacik5fd02042012-05-02 14:00:54 -0400227int clear_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end,
228 struct extent_state **cached_state, gfp_t mask);
Chris Masond1310b22008-01-24 16:13:08 -0500229int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end,
230 gfp_t mask);
231int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
232 gfp_t mask);
233int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
234 gfp_t mask);
Josef Bacik462d6fa2011-09-26 13:56:12 -0400235int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
David Sterba41074882013-04-29 13:38:46 +0000236 unsigned long bits, unsigned long clear_bits,
Josef Bacike6138872012-09-27 17:07:30 -0400237 struct extent_state **cached_state, gfp_t mask);
Chris Masond1310b22008-01-24 16:13:08 -0500238int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end,
Josef Bacik2ac55d42010-02-03 19:33:23 +0000239 struct extent_state **cached_state, gfp_t mask);
Liu Bo9e8a4a82012-09-05 19:10:51 -0600240int set_extent_defrag(struct extent_io_tree *tree, u64 start, u64 end,
241 struct extent_state **cached_state, gfp_t mask);
Chris Masond1310b22008-01-24 16:13:08 -0500242int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
David Sterba41074882013-04-29 13:38:46 +0000243 u64 *start_ret, u64 *end_ret, unsigned long bits,
Josef Bacike6138872012-09-27 17:07:30 -0400244 struct extent_state **cached_state);
Chris Masond1310b22008-01-24 16:13:08 -0500245int extent_invalidatepage(struct extent_io_tree *tree,
246 struct page *page, unsigned long offset);
247int extent_write_full_page(struct extent_io_tree *tree, struct page *page,
248 get_extent_t *get_extent,
249 struct writeback_control *wbc);
Chris Mason771ed682008-11-06 22:02:51 -0500250int extent_write_locked_range(struct extent_io_tree *tree, struct inode *inode,
251 u64 start, u64 end, get_extent_t *get_extent,
252 int mode);
Chris Masond1310b22008-01-24 16:13:08 -0500253int extent_writepages(struct extent_io_tree *tree,
254 struct address_space *mapping,
255 get_extent_t *get_extent,
256 struct writeback_control *wbc);
Josef Bacik0b32f4b2012-03-13 09:38:00 -0400257int btree_write_cache_pages(struct address_space *mapping,
258 struct writeback_control *wbc);
Chris Masond1310b22008-01-24 16:13:08 -0500259int extent_readpages(struct extent_io_tree *tree,
260 struct address_space *mapping,
261 struct list_head *pages, unsigned nr_pages,
262 get_extent_t get_extent);
Yehuda Sadeh1506fcc2009-01-21 14:39:14 -0500263int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
264 __u64 start, __u64 len, get_extent_t *get_extent);
Chris Masond1310b22008-01-24 16:13:08 -0500265int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private);
266void set_page_extent_mapped(struct page *page);
267
Josef Bacikf28491e2013-12-16 13:24:27 -0500268struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info,
Chris Mason727011e2010-08-06 13:21:20 -0400269 u64 start, unsigned long len);
Jan Schmidt815a51c2012-05-16 17:00:02 +0200270struct extent_buffer *alloc_dummy_extent_buffer(u64 start, unsigned long len);
271struct extent_buffer *btrfs_clone_extent_buffer(struct extent_buffer *src);
Josef Bacikf28491e2013-12-16 13:24:27 -0500272struct extent_buffer *find_extent_buffer(struct btrfs_fs_info *fs_info,
Chandra Seetharaman452c75c2013-10-07 10:45:25 -0500273 u64 start);
Chris Masond1310b22008-01-24 16:13:08 -0500274void free_extent_buffer(struct extent_buffer *eb);
Josef Bacik3083ee22012-03-09 16:01:49 -0500275void free_extent_buffer_stale(struct extent_buffer *eb);
Arne Jansenbb82ab82011-06-10 14:06:53 +0200276#define WAIT_NONE 0
277#define WAIT_COMPLETE 1
278#define WAIT_PAGE_LOCK 2
Chris Masond1310b22008-01-24 16:13:08 -0500279int read_extent_buffer_pages(struct extent_io_tree *tree,
Chris Masona86c12c2008-02-07 10:50:54 -0500280 struct extent_buffer *eb, u64 start, int wait,
Chris Masonf1885912008-04-09 16:28:12 -0400281 get_extent_t *get_extent, int mirror_num);
Josef Bacikfd8b2b62013-04-24 16:41:19 -0400282void wait_on_extent_buffer_writeback(struct extent_buffer *eb);
Robin Dong479ed9a2012-09-29 02:07:47 -0600283
284static inline unsigned long num_extent_pages(u64 start, u64 len)
285{
286 return ((start + len + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT) -
287 (start >> PAGE_CACHE_SHIFT);
288}
289
290static inline struct page *extent_buffer_page(struct extent_buffer *eb,
291 unsigned long i)
292{
293 return eb->pages[i];
294}
Chris Masond1310b22008-01-24 16:13:08 -0500295
296static inline void extent_buffer_get(struct extent_buffer *eb)
297{
298 atomic_inc(&eb->refs);
299}
300
301int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv,
302 unsigned long start,
303 unsigned long len);
304void read_extent_buffer(struct extent_buffer *eb, void *dst,
305 unsigned long start,
306 unsigned long len);
307void write_extent_buffer(struct extent_buffer *eb, const void *src,
308 unsigned long start, unsigned long len);
309void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src,
310 unsigned long dst_offset, unsigned long src_offset,
311 unsigned long len);
312void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
313 unsigned long src_offset, unsigned long len);
314void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
315 unsigned long src_offset, unsigned long len);
316void memset_extent_buffer(struct extent_buffer *eb, char c,
317 unsigned long start, unsigned long len);
Chris Mason1d4284b2012-03-28 20:31:37 -0400318void clear_extent_buffer_dirty(struct extent_buffer *eb);
Josef Bacik0b32f4b2012-03-13 09:38:00 -0400319int set_extent_buffer_dirty(struct extent_buffer *eb);
320int set_extent_buffer_uptodate(struct extent_buffer *eb);
321int clear_extent_buffer_uptodate(struct extent_buffer *eb);
322int extent_buffer_uptodate(struct extent_buffer *eb);
Josef Bacika26e8c92014-03-28 17:07:27 -0400323int extent_buffer_under_io(struct extent_buffer *eb);
Chris Masond1310b22008-01-24 16:13:08 -0500324int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset,
Chris Masona6591712011-07-19 12:04:14 -0400325 unsigned long min_len, char **map,
Chris Masond1310b22008-01-24 16:13:08 -0500326 unsigned long *map_start,
Chris Masona6591712011-07-19 12:04:14 -0400327 unsigned long *map_len);
Chris Mason4adaa612013-03-26 13:07:00 -0400328int extent_range_clear_dirty_for_io(struct inode *inode, u64 start, u64 end);
329int extent_range_redirty_for_io(struct inode *inode, u64 start, u64 end);
Josef Bacikc2790a22013-07-29 11:20:47 -0400330int extent_clear_unlock_delalloc(struct inode *inode, u64 start, u64 end,
331 struct page *locked_page,
332 unsigned long bits_to_clear,
333 unsigned long page_ops);
Miao Xie88f794e2010-11-22 03:02:55 +0000334struct bio *
335btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs,
336 gfp_t gfp_flags);
Chris Mason9be33952013-05-17 18:30:14 -0400337struct bio *btrfs_io_bio_alloc(gfp_t gfp_mask, unsigned int nr_iovecs);
338struct bio *btrfs_bio_clone(struct bio *bio, gfp_t gfp_mask);
Jan Schmidt4a54c8c2011-07-22 15:41:52 +0200339
Stefan Behrens3ec706c2012-11-05 15:46:42 +0100340struct btrfs_fs_info;
Jan Schmidt4a54c8c2011-07-22 15:41:52 +0200341
Stefan Behrens3ec706c2012-11-05 15:46:42 +0100342int repair_io_failure(struct btrfs_fs_info *fs_info, u64 start,
Jan Schmidt4a54c8c2011-07-22 15:41:52 +0200343 u64 length, u64 logical, struct page *page,
344 int mirror_num);
Jeff Mahoney87826df2012-02-15 16:23:57 +0100345int end_extent_writepage(struct page *page, int err, u64 start, u64 end);
Josef Bacikea466792012-03-26 21:57:36 -0400346int repair_eb_io_failure(struct btrfs_root *root, struct extent_buffer *eb,
347 int mirror_num);
Josef Bacik294e30f2013-10-09 12:00:56 -0400348#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
349noinline u64 find_lock_delalloc_range(struct inode *inode,
350 struct extent_io_tree *tree,
351 struct page *locked_page, u64 *start,
352 u64 *end, u64 max_bytes);
353#endif
Chris Masond1310b22008-01-24 16:13:08 -0500354#endif