2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
22 #define BTRFS_SUPER_INFO_OFFSET (64 * 1024)
23 #define BTRFS_SUPER_INFO_SIZE 4096
25 #define BTRFS_SUPER_MIRROR_MAX 3
26 #define BTRFS_SUPER_MIRROR_SHIFT 12
28 static inline u64
btrfs_sb_offset(int mirror
)
30 u64 start
= 16 * 1024;
32 return start
<< (BTRFS_SUPER_MIRROR_SHIFT
* mirror
);
33 return BTRFS_SUPER_INFO_OFFSET
;
37 struct btrfs_fs_devices
;
39 struct extent_buffer
*read_tree_block(struct btrfs_root
*root
, u64 bytenr
,
40 u32 blocksize
, u64 parent_transid
);
41 int readahead_tree_block(struct btrfs_root
*root
, u64 bytenr
, u32 blocksize
,
43 struct extent_buffer
*btrfs_find_create_tree_block(struct btrfs_root
*root
,
44 u64 bytenr
, u32 blocksize
);
45 int clean_tree_block(struct btrfs_trans_handle
*trans
,
46 struct btrfs_root
*root
, struct extent_buffer
*buf
);
47 struct btrfs_root
*open_ctree(struct super_block
*sb
,
48 struct btrfs_fs_devices
*fs_devices
,
50 int close_ctree(struct btrfs_root
*root
);
51 int write_ctree_super(struct btrfs_trans_handle
*trans
,
52 struct btrfs_root
*root
, int max_mirrors
);
53 struct buffer_head
*btrfs_read_dev_super(struct block_device
*bdev
);
54 int btrfs_commit_super(struct btrfs_root
*root
);
55 struct extent_buffer
*btrfs_find_tree_block(struct btrfs_root
*root
,
56 u64 bytenr
, u32 blocksize
);
57 struct btrfs_root
*btrfs_lookup_fs_root(struct btrfs_fs_info
*fs_info
,
59 struct btrfs_root
*btrfs_read_fs_root(struct btrfs_fs_info
*fs_info
,
60 struct btrfs_key
*location
,
61 const char *name
, int namelen
);
62 struct btrfs_root
*btrfs_read_fs_root_no_radix(struct btrfs_root
*tree_root
,
63 struct btrfs_key
*location
);
64 struct btrfs_root
*btrfs_read_fs_root_no_name(struct btrfs_fs_info
*fs_info
,
65 struct btrfs_key
*location
);
66 int btrfs_cleanup_fs_roots(struct btrfs_fs_info
*fs_info
);
67 int btrfs_insert_dev_radix(struct btrfs_root
*root
,
68 struct block_device
*bdev
,
72 void btrfs_btree_balance_dirty(struct btrfs_root
*root
, unsigned long nr
);
73 int btrfs_free_fs_root(struct btrfs_fs_info
*fs_info
, struct btrfs_root
*root
);
74 void btrfs_mark_buffer_dirty(struct extent_buffer
*buf
);
75 void btrfs_mark_buffer_dirty_nonblocking(struct extent_buffer
*buf
);
76 int btrfs_buffer_uptodate(struct extent_buffer
*buf
, u64 parent_transid
);
77 int btrfs_set_buffer_uptodate(struct extent_buffer
*buf
);
78 int wait_on_tree_block_writeback(struct btrfs_root
*root
,
79 struct extent_buffer
*buf
);
80 int btrfs_read_buffer(struct extent_buffer
*buf
, u64 parent_transid
);
81 u32
btrfs_csum_data(struct btrfs_root
*root
, char *data
, u32 seed
, size_t len
);
82 void btrfs_csum_final(u32 crc
, char *result
);
83 int btrfs_open_device(struct btrfs_device
*dev
);
84 int btrfs_verify_block_csum(struct btrfs_root
*root
,
85 struct extent_buffer
*buf
);
86 int btrfs_bio_wq_end_io(struct btrfs_fs_info
*info
, struct bio
*bio
,
88 int btrfs_wq_submit_bio(struct btrfs_fs_info
*fs_info
, struct inode
*inode
,
89 int rw
, struct bio
*bio
, int mirror_num
,
90 unsigned long bio_flags
,
91 extent_submit_bio_hook_t
*submit_bio_start
,
92 extent_submit_bio_hook_t
*submit_bio_done
);
94 int btrfs_congested_async(struct btrfs_fs_info
*info
, int iodone
);
95 unsigned long btrfs_async_submit_limit(struct btrfs_fs_info
*info
);
96 int btrfs_write_tree_block(struct extent_buffer
*buf
);
97 int btrfs_wait_tree_block_writeback(struct extent_buffer
*buf
);
98 int btrfs_free_log_root_tree(struct btrfs_trans_handle
*trans
,
99 struct btrfs_fs_info
*fs_info
);
100 int btrfs_init_log_root_tree(struct btrfs_trans_handle
*trans
,
101 struct btrfs_fs_info
*fs_info
);
102 int btrfs_add_log_tree(struct btrfs_trans_handle
*trans
,
103 struct btrfs_root
*root
);
104 int btree_lock_page_hook(struct page
*page
);
107 #ifdef CONFIG_DEBUG_LOCK_ALLOC
108 void btrfs_set_buffer_lockdep_class(struct extent_buffer
*eb
, int level
);
110 static inline void btrfs_set_buffer_lockdep_class(struct extent_buffer
*eb
,
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