blob: 25900af5b15d43e6bdfe0cef7c865ac2aa81bd36 [file] [log] [blame]
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)
Chris Masond1310b22008-01-24 16:13:08 -050022#define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK)
Yan, Zheng0ca1f7c2010-05-16 10:48:47 -040023#define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING | EXTENT_FIRST_DELALLOC)
Chris Masond1310b22008-01-24 16:13:08 -050024
Li Zefan261507a02010-12-17 14:21:50 +080025/*
26 * flags for bio submission. The high bits indicate the compression
27 * type for this bio
28 */
Chris Masonc8b97812008-10-29 14:49:59 -040029#define EXTENT_BIO_COMPRESSED 1
Li Zefan261507a02010-12-17 14:21:50 +080030#define EXTENT_BIO_FLAG_SHIFT 16
Chris Masonc8b97812008-10-29 14:49:59 -040031
Chris Masonb4ce94d2009-02-04 09:25:08 -050032/* these are bit numbers for test/set bit */
33#define EXTENT_BUFFER_UPTODATE 0
34#define EXTENT_BUFFER_BLOCKING 1
Chris Masonb9473432009-03-13 11:00:37 -040035#define EXTENT_BUFFER_DIRTY 2
Josef Bacika826d6d2011-03-16 13:42:43 -040036#define EXTENT_BUFFER_CORRUPT 3
Arne Jansenab0fff02011-05-23 14:25:41 +020037#define EXTENT_BUFFER_READAHEAD 4 /* this got triggered by readahead */
Josef Bacik3083ee22012-03-09 16:01:49 -050038#define EXTENT_BUFFER_TREE_REF 5
39#define EXTENT_BUFFER_STALE 6
Josef Bacik0b32f4b2012-03-13 09:38:00 -040040#define EXTENT_BUFFER_WRITEBACK 7
41#define EXTENT_BUFFER_IOERR 8
Jan Schmidt815a51c2012-05-16 17:00:02 +020042#define EXTENT_BUFFER_DUMMY 9
Chris Masonb4ce94d2009-02-04 09:25:08 -050043
Chris Masona791e352009-10-08 11:27:10 -040044/* these are flags for extent_clear_unlock_delalloc */
45#define EXTENT_CLEAR_UNLOCK_PAGE 0x1
46#define EXTENT_CLEAR_UNLOCK 0x2
47#define EXTENT_CLEAR_DELALLOC 0x4
48#define EXTENT_CLEAR_DIRTY 0x8
49#define EXTENT_SET_WRITEBACK 0x10
50#define EXTENT_END_WRITEBACK 0x20
51#define EXTENT_SET_PRIVATE2 0x40
Josef Bacik32c00af2009-10-08 13:34:05 -040052#define EXTENT_CLEAR_ACCOUNTING 0x80
Chris Masona791e352009-10-08 11:27:10 -040053
Chris Masond1310b22008-01-24 16:13:08 -050054/*
55 * page->private values. Every page that is controlled by the extent
56 * map has page->private set to one.
57 */
58#define EXTENT_PAGE_PRIVATE 1
59#define EXTENT_PAGE_PRIVATE_FIRST_PAGE 3
60
Chris Mason70dec802008-01-29 09:59:12 -050061struct extent_state;
Josef Bacikea466792012-03-26 21:57:36 -040062struct btrfs_root;
Chris Mason70dec802008-01-29 09:59:12 -050063
Chris Mason44b8bd72008-04-16 11:14:51 -040064typedef int (extent_submit_bio_hook_t)(struct inode *inode, int rw,
Chris Masonc8b97812008-10-29 14:49:59 -040065 struct bio *bio, int mirror_num,
Chris Masoneaf25d92010-05-25 09:48:28 -040066 unsigned long bio_flags, u64 bio_offset);
Chris Masond1310b22008-01-24 16:13:08 -050067struct extent_io_ops {
Chris Masonc8b97812008-10-29 14:49:59 -040068 int (*fill_delalloc)(struct inode *inode, struct page *locked_page,
Chris Mason771ed682008-11-06 22:02:51 -050069 u64 start, u64 end, int *page_started,
70 unsigned long *nr_written);
Chris Mason247e7432008-07-17 12:53:51 -040071 int (*writepage_start_hook)(struct page *page, u64 start, u64 end);
Chris Masond1310b22008-01-24 16:13:08 -050072 int (*writepage_io_hook)(struct page *page, u64 start, u64 end);
Chris Mason44b8bd72008-04-16 11:14:51 -040073 extent_submit_bio_hook_t *submit_bio_hook;
Chris Mason239b14b2008-03-24 15:02:07 -040074 int (*merge_bio_hook)(struct page *page, unsigned long offset,
Chris Masonc8b97812008-10-29 14:49:59 -040075 size_t size, struct bio *bio,
76 unsigned long bio_flags);
Chris Masond1310b22008-01-24 16:13:08 -050077 int (*readpage_io_hook)(struct page *page, u64 start, u64 end);
Josef Bacikea466792012-03-26 21:57:36 -040078 int (*readpage_io_failed_hook)(struct page *page, int failed_mirror);
Chris Mason70dec802008-01-29 09:59:12 -050079 int (*readpage_end_io_hook)(struct page *page, u64 start, u64 end,
Josef Bacik5cf1ab52012-04-16 09:42:26 -040080 struct extent_state *state, int mirror);
Chris Mason1259ab72008-05-12 13:39:03 -040081 int (*writepage_end_io_hook)(struct page *page, u64 start, u64 end,
Chris Masone6dcd2d2008-07-17 12:53:50 -040082 struct extent_state *state, int uptodate);
Jeff Mahoney1bf85042011-07-21 16:56:09 +000083 void (*set_bit_hook)(struct inode *inode, struct extent_state *state,
84 int *bits);
85 void (*clear_bit_hook)(struct inode *inode, struct extent_state *state,
86 int *bits);
87 void (*merge_extent_hook)(struct inode *inode,
88 struct extent_state *new,
89 struct extent_state *other);
90 void (*split_extent_hook)(struct inode *inode,
91 struct extent_state *orig, u64 split);
Chris Mason01d658f2011-11-01 10:08:06 -040092 int (*write_cache_pages_lock_hook)(struct page *page, void *data,
93 void (*flush_fn)(void *));
Chris Masond1310b22008-01-24 16:13:08 -050094};
95
96struct extent_io_tree {
97 struct rb_root state;
Miao Xie19fe0a82010-10-26 20:57:29 -040098 struct radix_tree_root buffer;
Chris Masond1310b22008-01-24 16:13:08 -050099 struct address_space *mapping;
100 u64 dirty_bytes;
Josef Bacik0b32f4b2012-03-13 09:38:00 -0400101 int track_uptodate;
Chris Mason70dec802008-01-29 09:59:12 -0500102 spinlock_t lock;
Chris Mason6af118ce2008-07-22 11:18:07 -0400103 spinlock_t buffer_lock;
Chris Masond1310b22008-01-24 16:13:08 -0500104 struct extent_io_ops *ops;
Chris Masond1310b22008-01-24 16:13:08 -0500105};
106
107struct extent_state {
108 u64 start;
109 u64 end; /* inclusive */
Chris Masond1310b22008-01-24 16:13:08 -0500110 struct rb_node rb_node;
Josef Bacik9ed74f22009-09-11 16:12:44 -0400111
112 /* ADD NEW ELEMENTS AFTER THIS */
Chris Mason70dec802008-01-29 09:59:12 -0500113 struct extent_io_tree *tree;
Chris Masond1310b22008-01-24 16:13:08 -0500114 wait_queue_head_t wq;
115 atomic_t refs;
116 unsigned long state;
117
118 /* for use by the FS */
119 u64 private;
120
Chris Mason2d2ae542008-03-26 16:24:23 -0400121 struct list_head leak_list;
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 Bacik4f2de97a2012-03-07 16:20:05 -0500132 struct extent_io_tree *tree;
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;
Chris Mason2d2ae542008-03-26 16:24:23 -0400137 struct list_head leak_list;
Miao Xie19fe0a82010-10-26 20:57:29 -0400138 struct rcu_head rcu_head;
Arne Jansen5b25f702011-09-13 10:55:48 +0200139 pid_t lock_owner;
Chris Masonb4ce94d2009-02-04 09:25:08 -0500140
Chris Masonbd681512011-07-16 15:23:14 -0400141 /* count of read lock holders on the extent buffer */
142 atomic_t write_locks;
143 atomic_t read_locks;
144 atomic_t blocking_writers;
145 atomic_t blocking_readers;
146 atomic_t spinning_readers;
147 atomic_t spinning_writers;
Arne Jansen5b25f702011-09-13 10:55:48 +0200148 int lock_nested;
Chris Masonb4ce94d2009-02-04 09:25:08 -0500149
Chris Masonbd681512011-07-16 15:23:14 -0400150 /* protects write locks */
151 rwlock_t lock;
152
153 /* readers use lock_wq while they wait for the write
154 * lock holders to unlock
Chris Masonb4ce94d2009-02-04 09:25:08 -0500155 */
Chris Masonbd681512011-07-16 15:23:14 -0400156 wait_queue_head_t write_lock_wq;
157
158 /* writers use read_lock_wq while they wait for readers
159 * to unlock
160 */
161 wait_queue_head_t read_lock_wq;
Chris Mason727011e2010-08-06 13:21:20 -0400162 wait_queue_head_t lock_wq;
163 struct page *inline_pages[INLINE_EXTENT_BUFFER_PAGES];
164 struct page **pages;
Chris Masond1310b22008-01-24 16:13:08 -0500165};
166
Li Zefan261507a02010-12-17 14:21:50 +0800167static inline void extent_set_compress_type(unsigned long *bio_flags,
168 int compress_type)
169{
170 *bio_flags |= compress_type << EXTENT_BIO_FLAG_SHIFT;
171}
172
173static inline int extent_compress_type(unsigned long bio_flags)
174{
175 return bio_flags >> EXTENT_BIO_FLAG_SHIFT;
176}
177
Chris Masond1310b22008-01-24 16:13:08 -0500178struct extent_map_tree;
179
180typedef struct extent_map *(get_extent_t)(struct inode *inode,
181 struct page *page,
David Sterba306e16c2011-04-19 14:29:38 +0200182 size_t pg_offset,
Chris Masond1310b22008-01-24 16:13:08 -0500183 u64 start, u64 len,
184 int create);
185
186void extent_io_tree_init(struct extent_io_tree *tree,
David Sterbaf993c882011-04-20 23:35:57 +0200187 struct address_space *mapping);
Chris Masond1310b22008-01-24 16:13:08 -0500188int try_release_extent_mapping(struct extent_map_tree *map,
Chris Mason70dec802008-01-29 09:59:12 -0500189 struct extent_io_tree *tree, struct page *page,
190 gfp_t mask);
Josef Bacik3083ee22012-03-09 16:01:49 -0500191int try_release_extent_buffer(struct page *page, gfp_t mask);
Chris Mason7b13b7b2008-04-18 10:29:50 -0400192int try_release_extent_state(struct extent_map_tree *map,
193 struct extent_io_tree *tree, struct page *page,
194 gfp_t mask);
Jeff Mahoneyd0082372012-03-01 14:57:19 +0100195int lock_extent(struct extent_io_tree *tree, u64 start, u64 end);
Chris Mason1edbb732009-09-02 13:24:36 -0400196int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
Jeff Mahoneyd0082372012-03-01 14:57:19 +0100197 int bits, struct extent_state **cached);
198int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end);
Josef Bacik2ac55d42010-02-03 19:33:23 +0000199int unlock_extent_cached(struct extent_io_tree *tree, u64 start, u64 end,
200 struct extent_state **cached, gfp_t mask);
Jeff Mahoneyd0082372012-03-01 14:57:19 +0100201int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end);
Chris Masond1310b22008-01-24 16:13:08 -0500202int extent_read_full_page(struct extent_io_tree *tree, struct page *page,
Jan Schmidt8ddc7d92011-06-13 20:02:58 +0200203 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,
Chris Mason9655d292009-09-02 15:22:30 -0400213 int bits, int filled, struct extent_state *cached_state);
Chris Masond1310b22008-01-24 16:13:08 -0500214int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
215 int bits, gfp_t mask);
Chris Masone6dcd2d2008-07-17 12:53:50 -0400216int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
Chris Mason2c64c532009-09-02 15:04:12 -0400217 int bits, int wake, int delete, struct extent_state **cached,
218 gfp_t mask);
Chris Masond1310b22008-01-24 16:13:08 -0500219int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
220 int bits, gfp_t mask);
Chris Mason4845e442010-05-25 20:56:50 -0400221int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
Jeff Mahoney3fbe5c02012-03-01 14:57:19 +0100222 int bits, u64 *failed_start,
Chris Mason4845e442010-05-25 20:56:50 -0400223 struct extent_state **cached_state, gfp_t mask);
Chris Masond1310b22008-01-24 16:13:08 -0500224int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end,
Arne Jansen507903b2011-04-06 10:02:20 +0000225 struct extent_state **cached_state, gfp_t mask);
Josef Bacik5fd02042012-05-02 14:00:54 -0400226int clear_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end,
227 struct extent_state **cached_state, gfp_t mask);
Chris Masond1310b22008-01-24 16:13:08 -0500228int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end,
229 gfp_t mask);
230int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
231 gfp_t mask);
232int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
233 gfp_t mask);
Josef Bacik462d6fa2011-09-26 13:56:12 -0400234int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
235 int bits, int clear_bits, gfp_t mask);
Chris Masond1310b22008-01-24 16:13:08 -0500236int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end,
Josef Bacik2ac55d42010-02-03 19:33:23 +0000237 struct extent_state **cached_state, gfp_t mask);
Chris Masond1310b22008-01-24 16:13:08 -0500238int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
239 u64 *start_ret, u64 *end_ret, int bits);
Chris Masond7fc6402008-02-18 12:12:38 -0500240struct extent_state *find_first_extent_bit_state(struct extent_io_tree *tree,
241 u64 start, int bits);
Chris Masond1310b22008-01-24 16:13:08 -0500242int extent_invalidatepage(struct extent_io_tree *tree,
243 struct page *page, unsigned long offset);
244int extent_write_full_page(struct extent_io_tree *tree, struct page *page,
245 get_extent_t *get_extent,
246 struct writeback_control *wbc);
Chris Mason771ed682008-11-06 22:02:51 -0500247int extent_write_locked_range(struct extent_io_tree *tree, struct inode *inode,
248 u64 start, u64 end, get_extent_t *get_extent,
249 int mode);
Chris Masond1310b22008-01-24 16:13:08 -0500250int extent_writepages(struct extent_io_tree *tree,
251 struct address_space *mapping,
252 get_extent_t *get_extent,
253 struct writeback_control *wbc);
Josef Bacik0b32f4b2012-03-13 09:38:00 -0400254int btree_write_cache_pages(struct address_space *mapping,
255 struct writeback_control *wbc);
Chris Masond1310b22008-01-24 16:13:08 -0500256int extent_readpages(struct extent_io_tree *tree,
257 struct address_space *mapping,
258 struct list_head *pages, unsigned nr_pages,
259 get_extent_t get_extent);
Yehuda Sadeh1506fcc2009-01-21 14:39:14 -0500260int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
261 __u64 start, __u64 len, get_extent_t *get_extent);
Chris Masond1310b22008-01-24 16:13:08 -0500262int set_state_private(struct extent_io_tree *tree, u64 start, u64 private);
263int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private);
264void set_page_extent_mapped(struct page *page);
265
266struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree,
Chris Mason727011e2010-08-06 13:21:20 -0400267 u64 start, unsigned long len);
Jan Schmidt815a51c2012-05-16 17:00:02 +0200268struct extent_buffer *alloc_dummy_extent_buffer(u64 start, unsigned long len);
269struct extent_buffer *btrfs_clone_extent_buffer(struct extent_buffer *src);
Chris Masond1310b22008-01-24 16:13:08 -0500270struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree,
David Sterbaf09d1f62011-04-21 01:08:01 +0200271 u64 start, unsigned long len);
Chris Masond1310b22008-01-24 16:13:08 -0500272void free_extent_buffer(struct extent_buffer *eb);
Josef Bacik3083ee22012-03-09 16:01:49 -0500273void free_extent_buffer_stale(struct extent_buffer *eb);
Arne Jansenbb82ab82011-06-10 14:06:53 +0200274#define WAIT_NONE 0
275#define WAIT_COMPLETE 1
276#define WAIT_PAGE_LOCK 2
Chris Masond1310b22008-01-24 16:13:08 -0500277int read_extent_buffer_pages(struct extent_io_tree *tree,
Chris Masona86c12c2008-02-07 10:50:54 -0500278 struct extent_buffer *eb, u64 start, int wait,
Chris Masonf1885912008-04-09 16:28:12 -0400279 get_extent_t *get_extent, int mirror_num);
Jan Schmidt4a54c8c2011-07-22 15:41:52 +0200280unsigned long num_extent_pages(u64 start, u64 len);
281struct page *extent_buffer_page(struct extent_buffer *eb, unsigned long i);
Chris Masond1310b22008-01-24 16:13:08 -0500282
283static inline void extent_buffer_get(struct extent_buffer *eb)
284{
285 atomic_inc(&eb->refs);
286}
287
288int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv,
289 unsigned long start,
290 unsigned long len);
291void read_extent_buffer(struct extent_buffer *eb, void *dst,
292 unsigned long start,
293 unsigned long len);
294void write_extent_buffer(struct extent_buffer *eb, const void *src,
295 unsigned long start, unsigned long len);
296void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src,
297 unsigned long dst_offset, unsigned long src_offset,
298 unsigned long len);
299void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
300 unsigned long src_offset, unsigned long len);
301void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
302 unsigned long src_offset, unsigned long len);
303void memset_extent_buffer(struct extent_buffer *eb, char c,
304 unsigned long start, unsigned long len);
Jeff Mahoney143bede2012-03-01 14:56:26 +0100305void wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits);
Chris Mason1d4284b2012-03-28 20:31:37 -0400306void clear_extent_buffer_dirty(struct extent_buffer *eb);
Josef Bacik0b32f4b2012-03-13 09:38:00 -0400307int set_extent_buffer_dirty(struct extent_buffer *eb);
308int set_extent_buffer_uptodate(struct extent_buffer *eb);
309int clear_extent_buffer_uptodate(struct extent_buffer *eb);
310int extent_buffer_uptodate(struct extent_buffer *eb);
Chris Masond1310b22008-01-24 16:13:08 -0500311int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset,
Chris Masona6591712011-07-19 12:04:14 -0400312 unsigned long min_len, char **map,
Chris Masond1310b22008-01-24 16:13:08 -0500313 unsigned long *map_start,
Chris Masona6591712011-07-19 12:04:14 -0400314 unsigned long *map_len);
Chris Masonce9adaa2008-04-09 16:28:12 -0400315int extent_range_uptodate(struct extent_io_tree *tree,
316 u64 start, u64 end);
Chris Masonc8b97812008-10-29 14:49:59 -0400317int extent_clear_unlock_delalloc(struct inode *inode,
318 struct extent_io_tree *tree,
319 u64 start, u64 end, struct page *locked_page,
Chris Masona791e352009-10-08 11:27:10 -0400320 unsigned long op);
Miao Xie88f794e2010-11-22 03:02:55 +0000321struct bio *
322btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs,
323 gfp_t gfp_flags);
Jan Schmidt4a54c8c2011-07-22 15:41:52 +0200324
325struct btrfs_mapping_tree;
326
327int repair_io_failure(struct btrfs_mapping_tree *map_tree, u64 start,
328 u64 length, u64 logical, struct page *page,
329 int mirror_num);
Jeff Mahoney87826df2012-02-15 16:23:57 +0100330int end_extent_writepage(struct page *page, int err, u64 start, u64 end);
Josef Bacikea466792012-03-26 21:57:36 -0400331int repair_eb_io_failure(struct btrfs_root *root, struct extent_buffer *eb,
332 int mirror_num);
Chris Masond1310b22008-01-24 16:13:08 -0500333#endif