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0b86a832 CM |
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_VOLUMES_ | |
20 | #define __BTRFS_VOLUMES_ | |
21 | struct btrfs_device { | |
22 | struct list_head dev_list; | |
23 | struct btrfs_root *dev_root; | |
0b86a832 CM |
24 | |
25 | struct block_device *bdev; | |
26 | ||
27 | /* the internal btrfs device id */ | |
28 | u64 devid; | |
29 | ||
30 | /* size of the device */ | |
31 | u64 total_bytes; | |
32 | ||
33 | /* bytes used */ | |
34 | u64 bytes_used; | |
35 | ||
36 | /* optimal io alignment for this device */ | |
37 | u32 io_align; | |
38 | ||
39 | /* optimal io width for this device */ | |
40 | u32 io_width; | |
41 | ||
42 | /* minimal io size for this device */ | |
43 | u32 sector_size; | |
44 | ||
0b86a832 CM |
45 | /* type and info about this device */ |
46 | u64 type; | |
47 | ||
0b86a832 CM |
48 | /* physical drive uuid (or lvm uuid) */ |
49 | u8 uuid[BTRFS_DEV_UUID_SIZE]; | |
0b86a832 CM |
50 | }; |
51 | ||
52 | int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans, | |
53 | struct btrfs_device *device, | |
54 | u64 owner, u64 num_bytes, u64 *start); | |
55 | int btrfs_map_block(struct btrfs_mapping_tree *map_tree, | |
56 | u64 logical, u64 *phys, u64 *length, | |
57 | struct btrfs_device **dev); | |
58 | int btrfs_read_sys_array(struct btrfs_root *root); | |
59 | int btrfs_read_chunk_tree(struct btrfs_root *root); | |
60 | int btrfs_alloc_chunk(struct btrfs_trans_handle *trans, | |
61 | struct btrfs_root *extent_root, u64 *start, | |
6324fbf3 | 62 | u64 *num_bytes, u64 type); |
0b86a832 CM |
63 | void btrfs_mapping_init(struct btrfs_mapping_tree *tree); |
64 | void btrfs_mapping_tree_free(struct btrfs_mapping_tree *tree); | |
65 | int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio); | |
0d81ba5d | 66 | int btrfs_read_super_device(struct btrfs_root *root, struct extent_buffer *buf); |
0b86a832 | 67 | #endif |