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19#ifndef __DISKIO__
20#define __DISKIO__
21
22#define BTRFS_SUPER_INFO_OFFSET (64 * 1024)
23#define BTRFS_SUPER_INFO_SIZE 4096
24
25#define BTRFS_SUPER_MIRROR_MAX 3
26#define BTRFS_SUPER_MIRROR_SHIFT 12
27
28enum {
29 BTRFS_WQ_ENDIO_DATA = 0,
30 BTRFS_WQ_ENDIO_METADATA = 1,
31 BTRFS_WQ_ENDIO_FREE_SPACE = 2,
32 BTRFS_WQ_ENDIO_RAID56 = 3,
33};
34
35static inline u64 btrfs_sb_offset(int mirror)
36{
37 u64 start = 16 * 1024;
38 if (mirror)
39 return start << (BTRFS_SUPER_MIRROR_SHIFT * mirror);
40 return BTRFS_SUPER_INFO_OFFSET;
41}
42
43struct btrfs_device;
44struct btrfs_fs_devices;
45
46struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
47 u32 blocksize, u64 parent_transid);
48int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize,
49 u64 parent_transid);
50int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize,
51 int mirror_num, struct extent_buffer **eb);
52struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
53 u64 bytenr, u32 blocksize);
54void clean_tree_block(struct btrfs_trans_handle *trans,
55 struct btrfs_root *root, struct extent_buffer *buf);
56int open_ctree(struct super_block *sb,
57 struct btrfs_fs_devices *fs_devices,
58 char *options);
59int close_ctree(struct btrfs_root *root);
60int write_ctree_super(struct btrfs_trans_handle *trans,
61 struct btrfs_root *root, int max_mirrors);
62struct buffer_head *btrfs_read_dev_super(struct block_device *bdev);
63int btrfs_commit_super(struct btrfs_root *root);
64void btrfs_error_commit_super(struct btrfs_root *root);
65struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root,
66 u64 bytenr, u32 blocksize);
67struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root,
68 struct btrfs_key *location);
69struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info,
70 struct btrfs_key *location);
71int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info);
72void btrfs_btree_balance_dirty(struct btrfs_root *root);
73void btrfs_btree_balance_dirty_nodelay(struct btrfs_root *root);
74void btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root);
75void btrfs_mark_buffer_dirty(struct extent_buffer *buf);
76int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid,
77 int atomic);
78int btrfs_set_buffer_uptodate(struct extent_buffer *buf);
79int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid);
80u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len);
81void btrfs_csum_final(u32 crc, char *result);
82int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio,
83 int metadata);
84int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode,
85 int rw, struct bio *bio, int mirror_num,
86 unsigned long bio_flags, u64 bio_offset,
87 extent_submit_bio_hook_t *submit_bio_start,
88 extent_submit_bio_hook_t *submit_bio_done);
89unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info);
90int btrfs_write_tree_block(struct extent_buffer *buf);
91int btrfs_wait_tree_block_writeback(struct extent_buffer *buf);
92int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
93 struct btrfs_fs_info *fs_info);
94int btrfs_add_log_tree(struct btrfs_trans_handle *trans,
95 struct btrfs_root *root);
96int btrfs_cleanup_transaction(struct btrfs_root *root);
97void btrfs_cleanup_one_transaction(struct btrfs_transaction *trans,
98 struct btrfs_root *root);
99void btrfs_abort_devices(struct btrfs_root *root);
100struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans,
101 struct btrfs_fs_info *fs_info,
102 u64 objectid);
103int btree_lock_page_hook(struct page *page, void *data,
104 void (*flush_fn)(void *));
105int btrfs_calc_num_tolerated_disk_barrier_failures(
106 struct btrfs_fs_info *fs_info);
107
108#ifdef CONFIG_DEBUG_LOCK_ALLOC
109void btrfs_init_lockdep(void);
110void btrfs_set_buffer_lockdep_class(u64 objectid,
111 struct extent_buffer *eb, int level);
112#else
113static inline void btrfs_init_lockdep(void)
114{ }
115static inline void btrfs_set_buffer_lockdep_class(u64 objectid,
116 struct extent_buffer *eb, int level)
117{
118}
119#endif
120#endif
121