blob: c668f36898d3a4c2dd2e0e18456dd2cfa6c55747 [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 */
David Sterba9ee49a042015-01-14 19:52:13 +01007#define EXTENT_DIRTY (1U << 0)
8#define EXTENT_WRITEBACK (1U << 1)
9#define EXTENT_UPTODATE (1U << 2)
10#define EXTENT_LOCKED (1U << 3)
11#define EXTENT_NEW (1U << 4)
12#define EXTENT_DELALLOC (1U << 5)
13#define EXTENT_DEFRAG (1U << 6)
14#define EXTENT_BOUNDARY (1U << 9)
15#define EXTENT_NODATASUM (1U << 10)
16#define EXTENT_DO_ACCOUNTING (1U << 11)
17#define EXTENT_FIRST_DELALLOC (1U << 12)
18#define EXTENT_NEED_WAIT (1U << 13)
19#define EXTENT_DAMAGED (1U << 14)
20#define EXTENT_NORESERVE (1U << 15)
21#define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK)
22#define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING | EXTENT_FIRST_DELALLOC)
Chris Masond1310b22008-01-24 16:13:08 -050023
Li Zefan261507a02010-12-17 14:21:50 +080024/*
25 * flags for bio submission. The high bits indicate the compression
26 * type for this bio
27 */
Chris Masonc8b97812008-10-29 14:49:59 -040028#define EXTENT_BIO_COMPRESSED 1
Josef Bacikde0022b2012-09-25 14:25:58 -040029#define EXTENT_BIO_TREE_LOG 2
Mark Fasheh4b384312013-08-06 11:42:50 -070030#define EXTENT_BIO_PARENT_LOCKED 4
Li Zefan261507a02010-12-17 14:21:50 +080031#define EXTENT_BIO_FLAG_SHIFT 16
Chris Masonc8b97812008-10-29 14:49:59 -040032
Chris Masonb4ce94d2009-02-04 09:25:08 -050033/* these are bit numbers for test/set bit */
34#define EXTENT_BUFFER_UPTODATE 0
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
Filipe Manana656f30d2014-09-26 12:25:56 +010041#define EXTENT_BUFFER_READ_ERR 8 /* read IO error */
Jan Schmidt815a51c2012-05-16 17:00:02 +020042#define EXTENT_BUFFER_DUMMY 9
Josef Bacik34b41ac2013-12-13 10:41:51 -050043#define EXTENT_BUFFER_IN_TREE 10
Filipe Manana656f30d2014-09-26 12:25:56 +010044#define EXTENT_BUFFER_WRITE_ERR 11 /* write IO error */
Chris Masonb4ce94d2009-02-04 09:25:08 -050045
Chris Masona791e352009-10-08 11:27:10 -040046/* these are flags for extent_clear_unlock_delalloc */
Josef Bacikc2790a22013-07-29 11:20:47 -040047#define PAGE_UNLOCK (1 << 0)
48#define PAGE_CLEAR_DIRTY (1 << 1)
49#define PAGE_SET_WRITEBACK (1 << 2)
50#define PAGE_END_WRITEBACK (1 << 3)
51#define PAGE_SET_PRIVATE2 (1 << 4)
Filipe Manana704de492014-10-06 22:14:22 +010052#define PAGE_SET_ERROR (1 << 5)
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
Chris Masond1310b22008-01-24 16:13:08 -050059
Chris Mason70dec802008-01-29 09:59:12 -050060struct extent_state;
Josef Bacikea466792012-03-26 21:57:36 -040061struct btrfs_root;
Miao Xiefacc8a222013-07-25 19:22:34 +080062struct btrfs_io_bio;
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;
David Woodhouse64a16702009-07-15 23:29:37 +010074 int (*merge_bio_hook)(int rw, 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);
Josef Bacikea466792012-03-26 21:57:36 -040077 int (*readpage_io_failed_hook)(struct page *page, int failed_mirror);
Miao Xiefacc8a222013-07-25 19:22:34 +080078 int (*readpage_end_io_hook)(struct btrfs_io_bio *io_bio, u64 phy_offset,
79 struct page *page, u64 start, u64 end,
80 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,
David Sterba9ee49a042015-01-14 19:52:13 +010084 unsigned *bits);
Jeff Mahoney1bf85042011-07-21 16:56:09 +000085 void (*clear_bit_hook)(struct inode *inode, struct extent_state *state,
David Sterba9ee49a042015-01-14 19:52:13 +010086 unsigned *bits);
Jeff Mahoney1bf85042011-07-21 16:56:09 +000087 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 Masond1310b22008-01-24 16:13:08 -050092};
93
94struct extent_io_tree {
95 struct rb_root state;
96 struct address_space *mapping;
97 u64 dirty_bytes;
Josef Bacik0b32f4b2012-03-13 09:38:00 -040098 int track_uptodate;
Chris Mason70dec802008-01-29 09:59:12 -050099 spinlock_t lock;
David Sterbae8c9f182015-01-02 18:23:10 +0100100 const struct extent_io_ops *ops;
Chris Masond1310b22008-01-24 16:13:08 -0500101};
102
103struct extent_state {
104 u64 start;
105 u64 end; /* inclusive */
Chris Masond1310b22008-01-24 16:13:08 -0500106 struct rb_node rb_node;
Josef Bacik9ed74f22009-09-11 16:12:44 -0400107
108 /* ADD NEW ELEMENTS AFTER THIS */
Chris Masond1310b22008-01-24 16:13:08 -0500109 wait_queue_head_t wq;
110 atomic_t refs;
David Sterba9ee49a042015-01-14 19:52:13 +0100111 unsigned state;
Chris Masond1310b22008-01-24 16:13:08 -0500112
113 /* for use by the FS */
114 u64 private;
115
Eric Sandeen6d49ba12013-04-22 16:12:31 +0000116#ifdef CONFIG_BTRFS_DEBUG
Chris Mason2d2ae542008-03-26 16:24:23 -0400117 struct list_head leak_list;
Eric Sandeen6d49ba12013-04-22 16:12:31 +0000118#endif
Chris Masond1310b22008-01-24 16:13:08 -0500119};
120
Chris Mason727011e2010-08-06 13:21:20 -0400121#define INLINE_EXTENT_BUFFER_PAGES 16
122#define MAX_INLINE_EXTENT_BUFFER_SIZE (INLINE_EXTENT_BUFFER_PAGES * PAGE_CACHE_SIZE)
Chris Masond1310b22008-01-24 16:13:08 -0500123struct extent_buffer {
124 u64 start;
125 unsigned long len;
Chris Masonb4ce94d2009-02-04 09:25:08 -0500126 unsigned long bflags;
Josef Bacikf28491e2013-12-16 13:24:27 -0500127 struct btrfs_fs_info *fs_info;
Josef Bacik3083ee22012-03-09 16:01:49 -0500128 spinlock_t refs_lock;
Chris Mason727011e2010-08-06 13:21:20 -0400129 atomic_t refs;
Josef Bacik0b32f4b2012-03-13 09:38:00 -0400130 atomic_t io_pages;
Josef Bacik5cf1ab52012-04-16 09:42:26 -0400131 int read_mirror;
Miao Xie19fe0a82010-10-26 20:57:29 -0400132 struct rcu_head rcu_head;
Arne Jansen5b25f702011-09-13 10:55:48 +0200133 pid_t lock_owner;
Chris Masonb4ce94d2009-02-04 09:25:08 -0500134
Chris Masonbd681512011-07-16 15:23:14 -0400135 /* 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;
Filipe Manana656f30d2014-09-26 12:25:56 +0100142 short lock_nested;
143 /* >= 0 if eb belongs to a log tree, -1 otherwise */
144 short log_index;
Chris Masonb4ce94d2009-02-04 09:25:08 -0500145
Chris Masonbd681512011-07-16 15:23:14 -0400146 /* protects write locks */
147 rwlock_t lock;
148
149 /* readers use lock_wq while they wait for the write
150 * lock holders to unlock
Chris Masonb4ce94d2009-02-04 09:25:08 -0500151 */
Chris Masonbd681512011-07-16 15:23:14 -0400152 wait_queue_head_t write_lock_wq;
153
154 /* writers use read_lock_wq while they wait for readers
155 * to unlock
156 */
157 wait_queue_head_t read_lock_wq;
David Sterbab8dae312013-02-28 14:54:18 +0000158 struct page *pages[INLINE_EXTENT_BUFFER_PAGES];
Eric Sandeen6d49ba12013-04-22 16:12:31 +0000159#ifdef CONFIG_BTRFS_DEBUG
160 struct list_head leak_list;
161#endif
Chris Masond1310b22008-01-24 16:13:08 -0500162};
163
Li Zefan261507a02010-12-17 14:21:50 +0800164static inline void extent_set_compress_type(unsigned long *bio_flags,
165 int compress_type)
166{
167 *bio_flags |= compress_type << EXTENT_BIO_FLAG_SHIFT;
168}
169
170static inline int extent_compress_type(unsigned long bio_flags)
171{
172 return bio_flags >> EXTENT_BIO_FLAG_SHIFT;
173}
174
Chris Masond1310b22008-01-24 16:13:08 -0500175struct extent_map_tree;
176
177typedef struct extent_map *(get_extent_t)(struct inode *inode,
178 struct page *page,
David Sterba306e16c2011-04-19 14:29:38 +0200179 size_t pg_offset,
Chris Masond1310b22008-01-24 16:13:08 -0500180 u64 start, u64 len,
181 int create);
182
183void extent_io_tree_init(struct extent_io_tree *tree,
David Sterbaf993c882011-04-20 23:35:57 +0200184 struct address_space *mapping);
Chris Masond1310b22008-01-24 16:13:08 -0500185int try_release_extent_mapping(struct extent_map_tree *map,
Chris Mason70dec802008-01-29 09:59:12 -0500186 struct extent_io_tree *tree, struct page *page,
187 gfp_t mask);
David Sterbaf7a52a42013-04-26 14:56:29 +0000188int try_release_extent_buffer(struct page *page);
Jeff Mahoneyd0082372012-03-01 14:57:19 +0100189int lock_extent(struct extent_io_tree *tree, u64 start, u64 end);
Chris Mason1edbb732009-09-02 13:24:36 -0400190int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
David Sterba9ee49a042015-01-14 19:52:13 +0100191 unsigned bits, struct extent_state **cached);
Jeff Mahoneyd0082372012-03-01 14:57:19 +0100192int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end);
Josef Bacik2ac55d42010-02-03 19:33:23 +0000193int unlock_extent_cached(struct extent_io_tree *tree, u64 start, u64 end,
194 struct extent_state **cached, gfp_t mask);
Jeff Mahoneyd0082372012-03-01 14:57:19 +0100195int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end);
Chris Masond1310b22008-01-24 16:13:08 -0500196int extent_read_full_page(struct extent_io_tree *tree, struct page *page,
Jan Schmidt8ddc7d92011-06-13 20:02:58 +0200197 get_extent_t *get_extent, int mirror_num);
Mark Fasheh4b384312013-08-06 11:42:50 -0700198int extent_read_full_page_nolock(struct extent_io_tree *tree, struct page *page,
199 get_extent_t *get_extent, int mirror_num);
Chris Masond1310b22008-01-24 16:13:08 -0500200int __init extent_io_init(void);
201void extent_io_exit(void);
202
203u64 count_range_bits(struct extent_io_tree *tree,
204 u64 *start, u64 search_end,
David Sterba9ee49a042015-01-14 19:52:13 +0100205 u64 max_bytes, unsigned bits, int contig);
Chris Masond1310b22008-01-24 16:13:08 -0500206
Chris Mason4845e442010-05-25 20:56:50 -0400207void free_extent_state(struct extent_state *state);
Chris Masond1310b22008-01-24 16:13:08 -0500208int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
David Sterba9ee49a042015-01-14 19:52:13 +0100209 unsigned bits, int filled,
David Sterba41074882013-04-29 13:38:46 +0000210 struct extent_state *cached_state);
Chris Masond1310b22008-01-24 16:13:08 -0500211int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
David Sterba9ee49a042015-01-14 19:52:13 +0100212 unsigned bits, gfp_t mask);
Chris Masone6dcd2d2008-07-17 12:53:50 -0400213int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
David Sterba9ee49a042015-01-14 19:52:13 +0100214 unsigned bits, int wake, int delete,
David Sterba41074882013-04-29 13:38:46 +0000215 struct extent_state **cached, gfp_t mask);
Chris Masond1310b22008-01-24 16:13:08 -0500216int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
David Sterba9ee49a042015-01-14 19:52:13 +0100217 unsigned bits, gfp_t mask);
Chris Mason4845e442010-05-25 20:56:50 -0400218int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
David Sterba9ee49a042015-01-14 19:52:13 +0100219 unsigned bits, u64 *failed_start,
Chris Mason4845e442010-05-25 20:56:50 -0400220 struct extent_state **cached_state, gfp_t mask);
Chris Masond1310b22008-01-24 16:13:08 -0500221int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end,
Arne Jansen507903b2011-04-06 10:02:20 +0000222 struct extent_state **cached_state, gfp_t mask);
Josef Bacik5fd02042012-05-02 14:00:54 -0400223int clear_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end,
224 struct extent_state **cached_state, gfp_t mask);
Chris Masond1310b22008-01-24 16:13:08 -0500225int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end,
226 gfp_t mask);
227int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
228 gfp_t mask);
229int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
230 gfp_t mask);
Josef Bacik462d6fa2011-09-26 13:56:12 -0400231int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
David Sterba9ee49a042015-01-14 19:52:13 +0100232 unsigned bits, unsigned clear_bits,
Josef Bacike6138872012-09-27 17:07:30 -0400233 struct extent_state **cached_state, gfp_t mask);
Chris Masond1310b22008-01-24 16:13:08 -0500234int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end,
Josef Bacik2ac55d42010-02-03 19:33:23 +0000235 struct extent_state **cached_state, gfp_t mask);
Liu Bo9e8a4a82012-09-05 19:10:51 -0600236int set_extent_defrag(struct extent_io_tree *tree, u64 start, u64 end,
237 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,
David Sterba9ee49a042015-01-14 19:52:13 +0100239 u64 *start_ret, u64 *end_ret, unsigned bits,
Josef Bacike6138872012-09-27 17:07:30 -0400240 struct extent_state **cached_state);
Chris Masond1310b22008-01-24 16:13:08 -0500241int extent_invalidatepage(struct extent_io_tree *tree,
242 struct page *page, unsigned long offset);
243int extent_write_full_page(struct extent_io_tree *tree, struct page *page,
244 get_extent_t *get_extent,
245 struct writeback_control *wbc);
Chris Mason771ed682008-11-06 22:02:51 -0500246int extent_write_locked_range(struct extent_io_tree *tree, struct inode *inode,
247 u64 start, u64 end, get_extent_t *get_extent,
248 int mode);
Chris Masond1310b22008-01-24 16:13:08 -0500249int extent_writepages(struct extent_io_tree *tree,
250 struct address_space *mapping,
251 get_extent_t *get_extent,
252 struct writeback_control *wbc);
Josef Bacik0b32f4b2012-03-13 09:38:00 -0400253int btree_write_cache_pages(struct address_space *mapping,
254 struct writeback_control *wbc);
Chris Masond1310b22008-01-24 16:13:08 -0500255int extent_readpages(struct extent_io_tree *tree,
256 struct address_space *mapping,
257 struct list_head *pages, unsigned nr_pages,
258 get_extent_t get_extent);
Yehuda Sadeh1506fcc2009-01-21 14:39:14 -0500259int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
260 __u64 start, __u64 len, get_extent_t *get_extent);
Chris Masond1310b22008-01-24 16:13:08 -0500261int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private);
262void set_page_extent_mapped(struct page *page);
263
Josef Bacikf28491e2013-12-16 13:24:27 -0500264struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info,
David Sterbace3e6982014-06-15 03:00:04 +0200265 u64 start);
David Sterba3f556f72014-06-15 03:20:26 +0200266struct extent_buffer *alloc_dummy_extent_buffer(struct btrfs_fs_info *fs_info,
267 u64 start);
Jan Schmidt815a51c2012-05-16 17:00:02 +0200268struct extent_buffer *btrfs_clone_extent_buffer(struct extent_buffer *src);
Josef Bacikf28491e2013-12-16 13:24:27 -0500269struct extent_buffer *find_extent_buffer(struct btrfs_fs_info *fs_info,
Chandra Seetharaman452c75c2013-10-07 10:45:25 -0500270 u64 start);
Chris Masond1310b22008-01-24 16:13:08 -0500271void free_extent_buffer(struct extent_buffer *eb);
Josef Bacik3083ee22012-03-09 16:01:49 -0500272void free_extent_buffer_stale(struct extent_buffer *eb);
Arne Jansenbb82ab82011-06-10 14:06:53 +0200273#define WAIT_NONE 0
274#define WAIT_COMPLETE 1
275#define WAIT_PAGE_LOCK 2
Chris Masond1310b22008-01-24 16:13:08 -0500276int read_extent_buffer_pages(struct extent_io_tree *tree,
Chris Masona86c12c2008-02-07 10:50:54 -0500277 struct extent_buffer *eb, u64 start, int wait,
Chris Masonf1885912008-04-09 16:28:12 -0400278 get_extent_t *get_extent, int mirror_num);
Josef Bacikfd8b2b62013-04-24 16:41:19 -0400279void wait_on_extent_buffer_writeback(struct extent_buffer *eb);
Robin Dong479ed9a2012-09-29 02:07:47 -0600280
281static inline unsigned long num_extent_pages(u64 start, u64 len)
282{
283 return ((start + len + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT) -
284 (start >> PAGE_CACHE_SHIFT);
285}
286
Chris Masond1310b22008-01-24 16:13:08 -0500287static inline void extent_buffer_get(struct extent_buffer *eb)
288{
289 atomic_inc(&eb->refs);
290}
291
292int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv,
293 unsigned long start,
294 unsigned long len);
295void read_extent_buffer(struct extent_buffer *eb, void *dst,
296 unsigned long start,
297 unsigned long len);
Gerhard Heift550ac1d2014-01-30 16:24:01 +0100298int read_extent_buffer_to_user(struct extent_buffer *eb, void __user *dst,
299 unsigned long start,
300 unsigned long len);
Chris Masond1310b22008-01-24 16:13:08 -0500301void write_extent_buffer(struct extent_buffer *eb, const void *src,
302 unsigned long start, unsigned long len);
303void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src,
304 unsigned long dst_offset, unsigned long src_offset,
305 unsigned long len);
306void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
307 unsigned long src_offset, unsigned long len);
308void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
309 unsigned long src_offset, unsigned long len);
310void memset_extent_buffer(struct extent_buffer *eb, char c,
311 unsigned long start, unsigned long len);
Chris Mason1d4284b2012-03-28 20:31:37 -0400312void clear_extent_buffer_dirty(struct extent_buffer *eb);
Josef Bacik0b32f4b2012-03-13 09:38:00 -0400313int set_extent_buffer_dirty(struct extent_buffer *eb);
314int set_extent_buffer_uptodate(struct extent_buffer *eb);
315int clear_extent_buffer_uptodate(struct extent_buffer *eb);
316int extent_buffer_uptodate(struct extent_buffer *eb);
Josef Bacika26e8c92014-03-28 17:07:27 -0400317int extent_buffer_under_io(struct extent_buffer *eb);
Chris Masond1310b22008-01-24 16:13:08 -0500318int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset,
Chris Masona6591712011-07-19 12:04:14 -0400319 unsigned long min_len, char **map,
Chris Masond1310b22008-01-24 16:13:08 -0500320 unsigned long *map_start,
Chris Masona6591712011-07-19 12:04:14 -0400321 unsigned long *map_len);
Chris Mason4adaa612013-03-26 13:07:00 -0400322int extent_range_clear_dirty_for_io(struct inode *inode, u64 start, u64 end);
323int extent_range_redirty_for_io(struct inode *inode, u64 start, u64 end);
Josef Bacikc2790a22013-07-29 11:20:47 -0400324int extent_clear_unlock_delalloc(struct inode *inode, u64 start, u64 end,
325 struct page *locked_page,
David Sterba9ee49a042015-01-14 19:52:13 +0100326 unsigned bits_to_clear,
Josef Bacikc2790a22013-07-29 11:20:47 -0400327 unsigned long page_ops);
Miao Xie88f794e2010-11-22 03:02:55 +0000328struct bio *
329btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs,
330 gfp_t gfp_flags);
Chris Mason9be33952013-05-17 18:30:14 -0400331struct bio *btrfs_io_bio_alloc(gfp_t gfp_mask, unsigned int nr_iovecs);
332struct bio *btrfs_bio_clone(struct bio *bio, gfp_t gfp_mask);
Jan Schmidt4a54c8c2011-07-22 15:41:52 +0200333
Stefan Behrens3ec706c2012-11-05 15:46:42 +0100334struct btrfs_fs_info;
Jan Schmidt4a54c8c2011-07-22 15:41:52 +0200335
Miao Xie1203b682014-09-12 18:44:01 +0800336int repair_io_failure(struct inode *inode, u64 start, u64 length, u64 logical,
337 struct page *page, unsigned int pg_offset,
338 int mirror_num);
Miao Xie8b110e32014-09-12 18:44:03 +0800339int clean_io_failure(struct inode *inode, u64 start, struct page *page,
340 unsigned int pg_offset);
Jeff Mahoney87826df2012-02-15 16:23:57 +0100341int end_extent_writepage(struct page *page, int err, u64 start, u64 end);
Josef Bacikea466792012-03-26 21:57:36 -0400342int repair_eb_io_failure(struct btrfs_root *root, struct extent_buffer *eb,
343 int mirror_num);
Miao Xie2fe63032014-09-12 18:43:59 +0800344
345/*
346 * When IO fails, either with EIO or csum verification fails, we
347 * try other mirrors that might have a good copy of the data. This
348 * io_failure_record is used to record state as we go through all the
349 * mirrors. If another mirror has good data, the page is set up to date
350 * and things continue. If a good mirror can't be found, the original
351 * bio end_io callback is called to indicate things have failed.
352 */
353struct io_failure_record {
354 struct page *page;
355 u64 start;
356 u64 len;
357 u64 logical;
358 unsigned long bio_flags;
359 int this_mirror;
360 int failed_mirror;
361 int in_validation;
362};
363
Miao Xief6124962014-09-12 18:44:04 +0800364void btrfs_free_io_failure_record(struct inode *inode, u64 start, u64 end);
Miao Xie2fe63032014-09-12 18:43:59 +0800365int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end,
366 struct io_failure_record **failrec_ret);
367int btrfs_check_repairable(struct inode *inode, struct bio *failed_bio,
368 struct io_failure_record *failrec, int fail_mirror);
369struct bio *btrfs_create_repair_bio(struct inode *inode, struct bio *failed_bio,
370 struct io_failure_record *failrec,
371 struct page *page, int pg_offset, int icsum,
Miao Xie8b110e32014-09-12 18:44:03 +0800372 bio_end_io_t *endio_func, void *data);
373int free_io_failure(struct inode *inode, struct io_failure_record *rec);
Josef Bacik294e30f2013-10-09 12:00:56 -0400374#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
375noinline u64 find_lock_delalloc_range(struct inode *inode,
376 struct extent_io_tree *tree,
377 struct page *locked_page, u64 *start,
378 u64 *end, u64 max_bytes);
Chris Mason0d4cf4e2014-10-07 13:24:20 -0700379#endif
Josef Bacikfaa2dbf2014-05-07 17:06:09 -0400380struct extent_buffer *alloc_test_extent_buffer(struct btrfs_fs_info *fs_info,
David Sterbace3e6982014-06-15 03:00:04 +0200381 u64 start);
Josef Bacik294e30f2013-10-09 12:00:56 -0400382#endif