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 #define BTRFS_RAID5_P_STRIPE ((u64)-2)
139 #define BTRFS_RAID6_Q_STRIPE ((u64)-1)
142 int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans,
143 struct btrfs_device *device,
144 u64 chunk_tree, u64 chunk_objectid,
146 u64 num_bytes, u64 *start);
147 int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
148 u64 logical, u64 *length, u64 *type,
149 struct btrfs_multi_bio **multi_ret, int mirror_num,
151 int btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
152 u64 logical, u64 *length,
153 struct btrfs_multi_bio **multi_ret, int mirror_num,
155 int btrfs_next_metadata(struct btrfs_mapping_tree *map_tree, u64 *logical,
157 int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree,
158 u64 chunk_start, u64 physical, u64 devid,
159 u64 **logical, int *naddrs, int *stripe_len);
160 int btrfs_read_sys_array(struct btrfs_root *root);
161 int btrfs_read_chunk_tree(struct btrfs_root *root);
162 int btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
163 struct btrfs_root *extent_root, u64 *start,
164 u64 *num_bytes, u64 type);
165 int btrfs_alloc_data_chunk(struct btrfs_trans_handle *trans,
166 struct btrfs_root *extent_root, u64 *start,
167 u64 num_bytes, u64 type);
168 int btrfs_read_super_device(struct btrfs_root *root, struct extent_buffer *buf);
169 int btrfs_add_device(struct btrfs_trans_handle *trans,
170 struct btrfs_root *root,
171 struct btrfs_device *device);
172 int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
174 int btrfs_close_devices(struct btrfs_fs_devices *fs_devices);
175 int btrfs_add_device(struct btrfs_trans_handle *trans,
176 struct btrfs_root *root,
177 struct btrfs_device *device);
178 int btrfs_update_device(struct btrfs_trans_handle *trans,
179 struct btrfs_device *device);
180 int btrfs_scan_one_device(int fd, const char *path,
181 struct btrfs_fs_devices **fs_devices_ret,
182 u64 *total_devs, u64 super_offset);
183 int btrfs_num_copies(struct btrfs_mapping_tree *map_tree, u64 logical, u64 len);
184 int btrfs_bootstrap_super_map(struct btrfs_mapping_tree *map_tree,
185 struct btrfs_fs_devices *fs_devices);
186 struct list_head *btrfs_scanned_uuids(void);
187 int btrfs_add_system_chunk(struct btrfs_trans_handle *trans,
188 struct btrfs_root *root, struct btrfs_key *key,
189 struct btrfs_chunk *chunk, int item_size);
190 int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset);
191 struct btrfs_device *btrfs_find_device_by_devid(struct btrfs_root *root,
192 u64 devid, int instance);