2 * Copyright (C) 2007 Oracle. All rights reserved.
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.
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.
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.
19 #ifndef __BTRFS_VOLUMES_
20 #define __BTRFS_VOLUMES_
22 struct list_head dev_list
;
23 struct btrfs_root
*dev_root
;
24 struct btrfs_key dev_key
;
28 /* the internal btrfs device id */
31 /* size of the device */
37 /* optimal io alignment for this device */
40 /* optimal io width for this device */
43 /* minimal io size for this device */
46 /* the kernel device number */
49 /* type and info about this device */
52 /* partition number, 0 for whole dev */
55 /* length of the name data at the end of the item */
58 /* physical drive uuid (or lvm uuid) */
59 u8 uuid
[BTRFS_DEV_UUID_SIZE
];
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
,
74 u64
*num_bytes
, u64 type
);