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
;
31 /* the internal btrfs device id */
34 /* size of the device */
40 /* optimal io alignment for this device */
43 /* optimal io width for this device */
46 /* minimal io size for this device */
49 /* type and info about this device */
52 /* physical drive uuid (or lvm uuid) */
53 u8 uuid
[BTRFS_UUID_SIZE
];
56 struct btrfs_fs_devices
{
57 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
59 /* the device with this id has the most recent coyp of the super */
65 struct list_head devices
;
66 struct list_head list
;
69 struct btrfs_bio_stripe
{
70 struct btrfs_device
*dev
;
74 struct btrfs_multi_bio
{
77 struct btrfs_bio_stripe stripes
[];
80 #define btrfs_multi_bio_size(n) (sizeof(struct btrfs_multi_bio) + \
81 (sizeof(struct btrfs_bio_stripe) * (n)))
83 int btrfs_alloc_dev_extent(struct btrfs_trans_handle
*trans
,
84 struct btrfs_device
*device
,
85 u64 chunk_tree
, u64 chunk_objectid
,
87 u64 num_bytes
, u64
*start
);
88 int btrfs_map_block(struct btrfs_mapping_tree
*map_tree
, int rw
,
89 u64 logical
, u64
*length
,
90 struct btrfs_multi_bio
**multi_ret
, int mirror_num
);
91 int btrfs_read_sys_array(struct btrfs_root
*root
);
92 int btrfs_read_chunk_tree(struct btrfs_root
*root
);
93 int btrfs_alloc_chunk(struct btrfs_trans_handle
*trans
,
94 struct btrfs_root
*extent_root
, u64
*start
,
95 u64
*num_bytes
, u64 type
);
96 int btrfs_read_super_device(struct btrfs_root
*root
, struct extent_buffer
*buf
);
97 int btrfs_add_device(struct btrfs_trans_handle
*trans
,
98 struct btrfs_root
*root
,
99 struct btrfs_device
*device
);
100 int btrfs_open_devices(struct btrfs_fs_devices
*fs_devices
,
102 int btrfs_close_devices(struct btrfs_fs_devices
*fs_devices
);
103 int btrfs_add_device(struct btrfs_trans_handle
*trans
,
104 struct btrfs_root
*root
,
105 struct btrfs_device
*device
);
106 int btrfs_scan_one_device(int fd
, const char *path
,
107 struct btrfs_fs_devices
**fs_devices_ret
,
108 u64
*total_devs
, u64 super_offset
);
109 int btrfs_num_copies(struct btrfs_mapping_tree
*map_tree
, u64 logical
, u64 len
);
110 int btrfs_bootstrap_super_map(struct btrfs_mapping_tree
*map_tree
,
111 struct btrfs_fs_devices
*fs_devices
);