| | 1 | /* |
| | 2 | * Copyright (C) 2007 Oracle. All rights reserved. |
| | 3 | * |
| | 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. |
| | 7 | * |
| | 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. |
| | 12 | * |
| | 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. |
| | 17 | */ |
| | 18 | |
| | 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 | |
| | 28 | static inline u64 btrfs_sb_offset(int mirror) |
| | 29 | { |
| | 30 | u64 start = 16 * 1024; |
| | 31 | if (mirror) |
| | 32 | return start << (BTRFS_SUPER_MIRROR_SHIFT * mirror); |
| | 33 | return BTRFS_SUPER_INFO_OFFSET; |
| | 34 | } |
| | 35 | |
| | 36 | struct btrfs_device; |
| | 37 | struct btrfs_fs_devices; |
| | 38 | |
| | 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, |
| | 42 | u64 parent_transid); |
| | 43 | int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize, |
| | 44 | int mirror_num, struct extent_buffer **eb); |
| | 45 | struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, |
| | 46 | u64 bytenr, u32 blocksize); |
| | 47 | int clean_tree_block(struct btrfs_trans_handle *trans, |
| | 48 | struct btrfs_root *root, struct extent_buffer *buf); |
| | 49 | struct btrfs_root *open_ctree(struct super_block *sb, |
| | 50 | struct btrfs_fs_devices *fs_devices, |
| | 51 | char *options); |
| | 52 | int close_ctree(struct btrfs_root *root); |
| | 53 | int write_ctree_super(struct btrfs_trans_handle *trans, |
| | 54 | struct btrfs_root *root, int max_mirrors); |
| | 55 | struct buffer_head *btrfs_read_dev_super(struct block_device *bdev); |
| | 56 | int btrfs_commit_super(struct btrfs_root *root); |
| | 57 | int btrfs_error_commit_super(struct btrfs_root *root); |
| | 58 | struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root, |
| | 59 | u64 bytenr, u32 blocksize); |
| | 60 | struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root, |
| | 61 | struct btrfs_key *location); |
| | 62 | struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info, |
| | 63 | struct btrfs_key *location); |
| | 64 | int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info); |
| | 65 | void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr); |
| | 66 | void __btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr); |
| | 67 | int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root); |
| | 68 | void btrfs_mark_buffer_dirty(struct extent_buffer *buf); |
| | 69 | int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid); |
| | 70 | int btrfs_set_buffer_uptodate(struct extent_buffer *buf); |
| | 71 | int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid); |
| | 72 | u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len); |
| | 73 | void btrfs_csum_final(u32 crc, char *result); |
| | 74 | int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, |
| | 75 | int metadata); |
| | 76 | int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, |
| | 77 | int rw, struct bio *bio, int mirror_num, |
| | 78 | unsigned long bio_flags, u64 bio_offset, |
| | 79 | extent_submit_bio_hook_t *submit_bio_start, |
| | 80 | extent_submit_bio_hook_t *submit_bio_done); |
| | 81 | unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info); |
| | 82 | int btrfs_write_tree_block(struct extent_buffer *buf); |
| | 83 | int btrfs_wait_tree_block_writeback(struct extent_buffer *buf); |
| | 84 | int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, |
| | 85 | struct btrfs_fs_info *fs_info); |
| | 86 | int btrfs_add_log_tree(struct btrfs_trans_handle *trans, |
| | 87 | struct btrfs_root *root); |
| | 88 | |
| | 89 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| | 90 | void btrfs_init_lockdep(void); |
| | 91 | void btrfs_set_buffer_lockdep_class(u64 objectid, |
| | 92 | struct extent_buffer *eb, int level); |
| | 93 | #else |
| | 94 | static inline void btrfs_init_lockdep(void) |
| | 95 | { } |
| | 96 | static inline void btrfs_set_buffer_lockdep_class(u64 objectid, |
| | 97 | struct extent_buffer *eb, int level) |
| | 98 | { |
| | 99 | } |
| | 100 | #endif |
| | 101 | #endif |
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