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_
23 struct list_head dev_list
;
24 struct btrfs_root
*dev_root
;
25 struct btrfs_fs_devices
*fs_devices
;
35 /* these are read off the super block, only in the progs */
40 /* the internal btrfs device id */
43 /* size of the device */
49 /* optimal io alignment for this device */
52 /* optimal io width for this device */
55 /* minimal io size for this device */
58 /* type and info about this device */
61 /* physical drive uuid (or lvm uuid) */
62 u8 uuid
[BTRFS_UUID_SIZE
];
65 struct btrfs_fs_devices
{
66 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
68 /* the device with this id has the most recent coyp of the super */
74 struct list_head devices
;
75 struct list_head list
;
78 struct btrfs_fs_devices
*seed
;
81 struct btrfs_bio_stripe
{
82 struct btrfs_device
*dev
;
86 struct btrfs_multi_bio
{
89 struct btrfs_bio_stripe stripes
[];
93 struct cache_extent ce
;
101 struct btrfs_bio_stripe stripes
[];
104 #define btrfs_multi_bio_size(n) (sizeof(struct btrfs_multi_bio) + \
105 (sizeof(struct btrfs_bio_stripe) * (n)))
108 * Restriper's general type filter
110 #define BTRFS_BALANCE_DATA (1ULL << 0)
111 #define BTRFS_BALANCE_SYSTEM (1ULL << 1)
112 #define BTRFS_BALANCE_METADATA (1ULL << 2)
114 #define BTRFS_BALANCE_TYPE_MASK (BTRFS_BALANCE_DATA | \
115 BTRFS_BALANCE_SYSTEM | \
116 BTRFS_BALANCE_METADATA)
118 #define BTRFS_BALANCE_FORCE (1ULL << 3)
119 #define BTRFS_BALANCE_RESUME (1ULL << 4)
124 #define BTRFS_BALANCE_ARGS_PROFILES (1ULL << 0)
125 #define BTRFS_BALANCE_ARGS_USAGE (1ULL << 1)
126 #define BTRFS_BALANCE_ARGS_DEVID (1ULL << 2)
127 #define BTRFS_BALANCE_ARGS_DRANGE (1ULL << 3)
128 #define BTRFS_BALANCE_ARGS_VRANGE (1ULL << 4)
131 * Profile changing flags. When SOFT is set we won't relocate chunk if
132 * it already has the target profile (even though it may be
135 #define BTRFS_BALANCE_ARGS_CONVERT (1ULL << 8)
136 #define BTRFS_BALANCE_ARGS_SOFT (1ULL << 9)
138 int btrfs_alloc_dev_extent(struct btrfs_trans_handle
*trans
,
139 struct btrfs_device
*device
,
140 u64 chunk_tree
, u64 chunk_objectid
,
142 u64 num_bytes
, u64
*start
);
143 int __btrfs_map_block(struct btrfs_mapping_tree
*map_tree
, int rw
,
144 u64 logical
, u64
*length
, u64
*type
,
145 struct btrfs_multi_bio
**multi_ret
, int mirror_num
);
146 int btrfs_map_block(struct btrfs_mapping_tree
*map_tree
, int rw
,
147 u64 logical
, u64
*length
,
148 struct btrfs_multi_bio
**multi_ret
, int mirror_num
);
149 int btrfs_next_metadata(struct btrfs_mapping_tree
*map_tree
, u64
*logical
,
151 int btrfs_rmap_block(struct btrfs_mapping_tree
*map_tree
,
152 u64 chunk_start
, u64 physical
, u64 devid
,
153 u64
**logical
, int *naddrs
, int *stripe_len
);
154 int btrfs_read_sys_array(struct btrfs_root
*root
);
155 int btrfs_read_chunk_tree(struct btrfs_root
*root
);
156 int btrfs_alloc_chunk(struct btrfs_trans_handle
*trans
,
157 struct btrfs_root
*extent_root
, u64
*start
,
158 u64
*num_bytes
, u64 type
);
159 int btrfs_alloc_data_chunk(struct btrfs_trans_handle
*trans
,
160 struct btrfs_root
*extent_root
, u64
*start
,
161 u64 num_bytes
, u64 type
);
162 int btrfs_read_super_device(struct btrfs_root
*root
, struct extent_buffer
*buf
);
163 int btrfs_add_device(struct btrfs_trans_handle
*trans
,
164 struct btrfs_root
*root
,
165 struct btrfs_device
*device
);
166 int btrfs_open_devices(struct btrfs_fs_devices
*fs_devices
,
168 int btrfs_close_devices(struct btrfs_fs_devices
*fs_devices
);
169 int btrfs_add_device(struct btrfs_trans_handle
*trans
,
170 struct btrfs_root
*root
,
171 struct btrfs_device
*device
);
172 int btrfs_update_device(struct btrfs_trans_handle
*trans
,
173 struct btrfs_device
*device
);
174 int btrfs_scan_one_device(int fd
, const char *path
,
175 struct btrfs_fs_devices
**fs_devices_ret
,
176 u64
*total_devs
, u64 super_offset
);
177 int btrfs_num_copies(struct btrfs_mapping_tree
*map_tree
, u64 logical
, u64 len
);
178 int btrfs_bootstrap_super_map(struct btrfs_mapping_tree
*map_tree
,
179 struct btrfs_fs_devices
*fs_devices
);
180 struct list_head
*btrfs_scanned_uuids(void);
181 int btrfs_add_system_chunk(struct btrfs_trans_handle
*trans
,
182 struct btrfs_root
*root
, struct btrfs_key
*key
,
183 struct btrfs_chunk
*chunk
, int item_size
);
184 int btrfs_chunk_readonly(struct btrfs_root
*root
, u64 chunk_offset
);