| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 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 | void clean_tree_block(struct btrfs_trans_handle *trans, |
| 48 | struct btrfs_root *root, struct extent_buffer *buf); |
| 49 | int 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 | void 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 atomic); |
| 71 | int btrfs_set_buffer_uptodate(struct extent_buffer *buf); |
| 72 | int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid); |
| 73 | u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len); |
| 74 | void btrfs_csum_final(u32 crc, char *result); |
| 75 | int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, |
| 76 | int metadata); |
| 77 | int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, |
| 78 | int rw, struct bio *bio, int mirror_num, |
| 79 | unsigned long bio_flags, u64 bio_offset, |
| 80 | extent_submit_bio_hook_t *submit_bio_start, |
| 81 | extent_submit_bio_hook_t *submit_bio_done); |
| 82 | unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info); |
| 83 | int btrfs_write_tree_block(struct extent_buffer *buf); |
| 84 | int btrfs_wait_tree_block_writeback(struct extent_buffer *buf); |
| 85 | int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, |
| 86 | struct btrfs_fs_info *fs_info); |
| 87 | int btrfs_add_log_tree(struct btrfs_trans_handle *trans, |
| 88 | struct btrfs_root *root); |
| 89 | int btrfs_cleanup_transaction(struct btrfs_root *root); |
| 90 | void btrfs_cleanup_one_transaction(struct btrfs_transaction *trans, |
| 91 | struct btrfs_root *root); |
| 92 | void btrfs_abort_devices(struct btrfs_root *root); |
| 93 | |
| 94 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| 95 | void btrfs_init_lockdep(void); |
| 96 | void btrfs_set_buffer_lockdep_class(u64 objectid, |
| 97 | struct extent_buffer *eb, int level); |
| 98 | #else |
| 99 | static inline void btrfs_init_lockdep(void) |
| 100 | { } |
| 101 | static inline void btrfs_set_buffer_lockdep_class(u64 objectid, |
| 102 | struct extent_buffer *eb, int level) |
| 103 | { |
| 104 | } |
| 105 | #endif |
| 106 | #endif |