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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; | |
24 | struct btrfs_key dev_key; | |
25 | ||
26 | struct block_device *bdev; | |
27 | ||
28 | /* the internal btrfs device id */ | |
29 | u64 devid; | |
30 | ||
31 | /* size of the device */ | |
32 | u64 total_bytes; | |
33 | ||
34 | /* bytes used */ | |
35 | u64 bytes_used; | |
36 | ||
37 | /* optimal io alignment for this device */ | |
38 | u32 io_align; | |
39 | ||
40 | /* optimal io width for this device */ | |
41 | u32 io_width; | |
42 | ||
43 | /* minimal io size for this device */ | |
44 | u32 sector_size; | |
45 | ||
46 | /* the kernel device number */ | |
47 | u64 rdev; | |
48 | ||
49 | /* type and info about this device */ | |
50 | u64 type; | |
51 | ||
52 | /* partition number, 0 for whole dev */ | |
53 | int partition; | |
54 | ||
55 | /* length of the name data at the end of the item */ | |
56 | int name_len; | |
57 | ||
58 | /* physical drive uuid (or lvm uuid) */ | |
59 | u8 uuid[BTRFS_DEV_UUID_SIZE]; | |
60 | ||
61 | char *name; | |
62 | }; | |
63 | ||
64 | int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans, | |
65 | struct btrfs_device *device, | |
66 | u64 owner, u64 num_bytes, u64 *start); | |
67 | int btrfs_map_block(struct btrfs_mapping_tree *map_tree, | |
68 | u64 logical, u64 *phys, u64 *length, | |
69 | struct btrfs_device **dev); | |
70 | int btrfs_read_sys_array(struct btrfs_root *root); | |
71 | int btrfs_read_chunk_tree(struct btrfs_root *root); | |
72 | int btrfs_alloc_chunk(struct btrfs_trans_handle *trans, | |
73 | struct btrfs_root *extent_root, u64 *start, | |
6324fbf3 | 74 | u64 *num_bytes, u64 type); |
0b86a832 CM |
75 | void btrfs_mapping_init(struct btrfs_mapping_tree *tree); |
76 | void btrfs_mapping_tree_free(struct btrfs_mapping_tree *tree); | |
77 | int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio); | |
78 | #endif |