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Chris Mason6cbd5572007-06-12 09:07:21 -04001/*
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
Chris Masoneb60cea2007-02-02 09:18:22 -050019#ifndef __DISKIO__
20#define __DISKIO__
21
Yan Zhenga512bbf2008-12-08 16:46:26 -050022#define BTRFS_SUPER_INFO_OFFSET (64 * 1024)
Chris Masonf2984462008-04-10 16:19:33 -040023#define BTRFS_SUPER_INFO_SIZE 4096
Yan Zhenga512bbf2008-12-08 16:46:26 -050024
25#define BTRFS_SUPER_MIRROR_MAX 3
26#define BTRFS_SUPER_MIRROR_SHIFT 12
27
28static 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
Chris Mason0b86a832008-03-24 15:01:56 -040036struct btrfs_device;
Chris Mason8a4b83c2008-03-24 15:02:07 -040037struct btrfs_fs_devices;
Chris Masoneb60cea2007-02-02 09:18:22 -050038
Chris Masondb945352007-10-15 16:15:53 -040039struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
Chris Masonca7a79a2008-05-12 12:59:19 -040040 u32 blocksize, u64 parent_transid);
41int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize,
42 u64 parent_transid);
Chris Mason5f39d392007-10-15 16:14:19 -040043struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
Chris Masondb945352007-10-15 16:15:53 -040044 u64 bytenr, u32 blocksize);
Chris Masone20d96d2007-03-22 12:13:20 -040045int clean_tree_block(struct btrfs_trans_handle *trans,
Chris Mason5f39d392007-10-15 16:14:19 -040046 struct btrfs_root *root, struct extent_buffer *buf);
Chris Mason8a4b83c2008-03-24 15:02:07 -040047struct btrfs_root *open_ctree(struct super_block *sb,
Chris Masondfe25022008-05-13 13:46:40 -040048 struct btrfs_fs_devices *fs_devices,
49 char *options);
Chris Masone20d96d2007-03-22 12:13:20 -040050int close_ctree(struct btrfs_root *root);
Chris Mason79154b12007-03-22 15:59:16 -040051int write_ctree_super(struct btrfs_trans_handle *trans,
Yan Zhenga512bbf2008-12-08 16:46:26 -050052 struct btrfs_root *root, int max_mirrors);
53struct buffer_head *btrfs_read_dev_super(struct block_device *bdev);
Yan Zhengc146afa2008-11-12 14:34:12 -050054int btrfs_commit_super(struct btrfs_root *root);
Chris Mason5f39d392007-10-15 16:14:19 -040055struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root,
Chris Masondb945352007-10-15 16:15:53 -040056 u64 bytenr, u32 blocksize);
Chris Masondc17ff82008-01-08 15:46:30 -050057struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info,
58 u64 root_objectid);
Chris Mason0f7d52f2007-04-09 10:42:37 -040059struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info,
Josef Bacik58176a92007-08-29 15:47:34 -040060 struct btrfs_key *location,
61 const char *name, int namelen);
Chris Masone02119d2008-09-05 16:13:11 -040062struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root,
Chris Mason5eda7b52007-06-22 14:16:25 -040063 struct btrfs_key *location);
Chris Masonedbd8d42007-12-21 16:27:24 -050064struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info,
65 struct btrfs_key *location);
Yan Zhengc146afa2008-11-12 14:34:12 -050066int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info);
Chris Mason8352d8a2007-04-12 10:43:05 -040067int btrfs_insert_dev_radix(struct btrfs_root *root,
68 struct block_device *bdev,
Chris Masonb4100d62007-04-12 12:14:00 -040069 u64 device_id,
Chris Mason8352d8a2007-04-12 10:43:05 -040070 u64 block_start,
71 u64 num_blocks);
Chris Masond3c2fdcf2007-09-17 10:58:06 -040072void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr);
Chris Mason5eda7b52007-06-22 14:16:25 -040073int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root);
Chris Mason5f39d392007-10-15 16:14:19 -040074void btrfs_mark_buffer_dirty(struct extent_buffer *buf);
Chris Masonb9473432009-03-13 11:00:37 -040075void btrfs_mark_buffer_dirty_nonblocking(struct extent_buffer *buf);
Chris Mason1259ab72008-05-12 13:39:03 -040076int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid);
Chris Mason5f39d392007-10-15 16:14:19 -040077int btrfs_set_buffer_uptodate(struct extent_buffer *buf);
78int wait_on_tree_block_writeback(struct btrfs_root *root,
79 struct extent_buffer *buf);
Chris Masonca7a79a2008-05-12 12:59:19 -040080int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid);
Chris Masonff79f812007-10-15 16:22:25 -040081u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len);
82void btrfs_csum_final(u32 crc, char *result);
Chris Mason0b86a832008-03-24 15:01:56 -040083int btrfs_open_device(struct btrfs_device *dev);
Chris Mason0999df52008-04-01 13:48:14 -040084int btrfs_verify_block_csum(struct btrfs_root *root,
85 struct extent_buffer *buf);
Chris Mason22c59942008-04-09 16:28:12 -040086int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio,
87 int metadata);
Chris Mason44b8bd72008-04-16 11:14:51 -040088int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode,
89 int rw, struct bio *bio, int mirror_num,
Chris Masonc8b97812008-10-29 14:49:59 -040090 unsigned long bio_flags,
Chris Mason4a69a412008-11-06 22:03:00 -050091 extent_submit_bio_hook_t *submit_bio_start,
92 extent_submit_bio_hook_t *submit_bio_done);
93
Chris Mason777e6bd2008-08-15 15:34:15 -040094int btrfs_congested_async(struct btrfs_fs_info *info, int iodone);
Chris Masonb64a2852008-08-20 13:39:41 -040095unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info);
Chris Masone02119d2008-09-05 16:13:11 -040096int btrfs_write_tree_block(struct extent_buffer *buf);
97int btrfs_wait_tree_block_writeback(struct extent_buffer *buf);
98int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
99 struct btrfs_fs_info *fs_info);
100int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
101 struct btrfs_fs_info *fs_info);
Yan Zheng7237f182009-01-21 12:54:03 -0500102int btrfs_add_log_tree(struct btrfs_trans_handle *trans,
103 struct btrfs_root *root);
Chris Mason4bef0842008-09-08 11:18:08 -0400104int btree_lock_page_hook(struct page *page);
Chris Mason4008c042009-02-12 14:09:45 -0500105
106
107#ifdef CONFIG_DEBUG_LOCK_ALLOC
108void btrfs_set_buffer_lockdep_class(struct extent_buffer *eb, int level);
109#else
110static inline void btrfs_set_buffer_lockdep_class(struct extent_buffer *eb,
111 int level)
112{
113}
114#endif
Chris Masoneb60cea2007-02-02 09:18:22 -0500115#endif