btrfs-progs: Add support to suppress tree block csum error output
[platform/upstream/btrfs-progs.git] / disk-io.h
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 __BTRFS_DISK_IO_H__
20 #define __BTRFS_DISK_IO_H__
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 enum btrfs_open_ctree_flags {
29         OPEN_CTREE_WRITES               = (1 << 0),
30         OPEN_CTREE_PARTIAL              = (1 << 1),
31         OPEN_CTREE_BACKUP_ROOT          = (1 << 2),
32         OPEN_CTREE_RECOVER_SUPER        = (1 << 3),
33         OPEN_CTREE_RESTORE              = (1 << 4),
34         OPEN_CTREE_NO_BLOCK_GROUPS      = (1 << 5),
35         OPEN_CTREE_EXCLUSIVE            = (1 << 6),
36         OPEN_CTREE_NO_DEVICES           = (1 << 7),
37         /*
38          * Don't print error messages if bytenr or checksums do not match in
39          * tree block headers. Turn on by OPEN_CTREE_SUPPRESS_ERROR
40          */
41         OPEN_CTREE_SUPPRESS_CHECK_BLOCK_ERRORS  = (1 << 8)
42 };
43
44 static inline u64 btrfs_sb_offset(int mirror)
45 {
46         u64 start = 16 * 1024;
47         if (mirror)
48                 return start << (BTRFS_SUPER_MIRROR_SHIFT * mirror);
49         return BTRFS_SUPER_INFO_OFFSET;
50 }
51
52 struct btrfs_device;
53
54 int read_whole_eb(struct btrfs_fs_info *info, struct extent_buffer *eb, int mirror);
55 struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
56                                       u32 blocksize, u64 parent_transid);
57 void readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize,
58                           u64 parent_transid);
59 struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
60                                                    u64 bytenr, u32 blocksize);
61
62 int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
63                         u32 stripesize, struct btrfs_root *root,
64                         struct btrfs_fs_info *fs_info, u64 objectid);
65 int clean_tree_block(struct btrfs_trans_handle *trans,
66                      struct btrfs_root *root, struct extent_buffer *buf);
67
68 void btrfs_free_fs_info(struct btrfs_fs_info *fs_info);
69 struct btrfs_fs_info *btrfs_new_fs_info(int writable, u64 sb_bytenr);
70 int btrfs_check_fs_compatibility(struct btrfs_super_block *sb, int writable);
71 int btrfs_setup_all_roots(struct btrfs_fs_info *fs_info, u64 root_tree_bytenr,
72                           enum btrfs_open_ctree_flags flags);
73 void btrfs_release_all_roots(struct btrfs_fs_info *fs_info);
74 void btrfs_cleanup_all_caches(struct btrfs_fs_info *fs_info);
75 int btrfs_scan_fs_devices(int fd, const char *path,
76                           struct btrfs_fs_devices **fs_devices, u64 sb_bytenr,
77                           int super_recover, int skip_devices);
78 int btrfs_setup_chunk_tree_and_device_map(struct btrfs_fs_info *fs_info);
79
80 struct btrfs_root *open_ctree(const char *filename, u64 sb_bytenr,
81                               enum btrfs_open_ctree_flags flags);
82 struct btrfs_root *open_ctree_fd(int fp, const char *path, u64 sb_bytenr,
83                                  enum btrfs_open_ctree_flags flags);
84 struct btrfs_fs_info *open_ctree_fs_info(const char *filename,
85                                          u64 sb_bytenr, u64 root_tree_bytenr,
86                                          enum btrfs_open_ctree_flags flags);
87 int close_ctree(struct btrfs_root *root);
88 int write_all_supers(struct btrfs_root *root);
89 int write_ctree_super(struct btrfs_trans_handle *trans,
90                       struct btrfs_root *root);
91 int btrfs_read_dev_super(int fd, struct btrfs_super_block *sb, u64 sb_bytenr,
92                          int super_recover);
93 int btrfs_map_bh_to_logical(struct btrfs_root *root, struct extent_buffer *bh,
94                             u64 logical);
95 struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root,
96                                             u64 bytenr, u32 blocksize);
97 struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info,
98                                       struct btrfs_key *location);
99 struct btrfs_root *btrfs_read_fs_root_no_cache(struct btrfs_fs_info *fs_info,
100                                                struct btrfs_key *location);
101 int btrfs_free_fs_root(struct btrfs_root *root);
102 void btrfs_mark_buffer_dirty(struct extent_buffer *buf);
103 int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid);
104 int btrfs_set_buffer_uptodate(struct extent_buffer *buf);
105 int wait_on_tree_block_writeback(struct btrfs_root *root,
106                                  struct extent_buffer *buf);
107 u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len);
108 void btrfs_csum_final(u32 crc, char *result);
109
110 int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
111                              struct btrfs_root *root);
112 int btrfs_open_device(struct btrfs_device *dev);
113 int csum_tree_block_size(struct extent_buffer *buf, u16 csum_sectorsize,
114                          int verify);
115 int verify_tree_block_csum_silent(struct extent_buffer *buf, u16 csum_size);
116 int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid);
117 int write_and_map_eb(struct btrfs_trans_handle *trans, struct btrfs_root *root,
118                      struct extent_buffer *eb);
119
120 /* raid6.c */
121 void raid6_gen_syndrome(int disks, size_t bytes, void **ptrs);
122
123 #endif