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)))
106 #define btrfs_map_lookup_size(n) (sizeof(struct map_lookup) + \
107 (sizeof(struct btrfs_bio_stripe) * (n)))
110 * Restriper's general type filter
112 #define BTRFS_BALANCE_DATA (1ULL << 0)
113 #define BTRFS_BALANCE_SYSTEM (1ULL << 1)
114 #define BTRFS_BALANCE_METADATA (1ULL << 2)
116 #define BTRFS_BALANCE_TYPE_MASK (BTRFS_BALANCE_DATA | \
117 BTRFS_BALANCE_SYSTEM | \
118 BTRFS_BALANCE_METADATA)
120 #define BTRFS_BALANCE_FORCE (1ULL << 3)
121 #define BTRFS_BALANCE_RESUME (1ULL << 4)
126 #define BTRFS_BALANCE_ARGS_PROFILES (1ULL << 0)
127 #define BTRFS_BALANCE_ARGS_USAGE (1ULL << 1)
128 #define BTRFS_BALANCE_ARGS_DEVID (1ULL << 2)
129 #define BTRFS_BALANCE_ARGS_DRANGE (1ULL << 3)
130 #define BTRFS_BALANCE_ARGS_VRANGE (1ULL << 4)
133 * Profile changing flags. When SOFT is set we won't relocate chunk if
134 * it already has the target profile (even though it may be
137 #define BTRFS_BALANCE_ARGS_CONVERT (1ULL << 8)
138 #define BTRFS_BALANCE_ARGS_SOFT (1ULL << 9)
140 #define BTRFS_RAID5_P_STRIPE ((u64)-2)
141 #define BTRFS_RAID6_Q_STRIPE ((u64)-1)
144 int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans,
145 struct btrfs_device *device,
146 u64 chunk_tree, u64 chunk_objectid,
148 u64 num_bytes, u64 *start);
149 int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
150 u64 logical, u64 *length, u64 *type,
151 struct btrfs_multi_bio **multi_ret, int mirror_num,
153 int btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
154 u64 logical, u64 *length,
155 struct btrfs_multi_bio **multi_ret, int mirror_num,
157 int btrfs_next_metadata(struct btrfs_mapping_tree *map_tree, u64 *logical,
159 int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree,
160 u64 chunk_start, u64 physical, u64 devid,
161 u64 **logical, int *naddrs, int *stripe_len);
162 int btrfs_read_sys_array(struct btrfs_root *root);
163 int btrfs_read_chunk_tree(struct btrfs_root *root);
164 int btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
165 struct btrfs_root *extent_root, u64 *start,
166 u64 *num_bytes, u64 type);
167 int btrfs_alloc_data_chunk(struct btrfs_trans_handle *trans,
168 struct btrfs_root *extent_root, u64 *start,
169 u64 num_bytes, u64 type);
170 int btrfs_read_super_device(struct btrfs_root *root, struct extent_buffer *buf);
171 int btrfs_add_device(struct btrfs_trans_handle *trans,
172 struct btrfs_root *root,
173 struct btrfs_device *device);
174 int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
176 int btrfs_close_devices(struct btrfs_fs_devices *fs_devices);
177 int btrfs_add_device(struct btrfs_trans_handle *trans,
178 struct btrfs_root *root,
179 struct btrfs_device *device);
180 int btrfs_update_device(struct btrfs_trans_handle *trans,
181 struct btrfs_device *device);
182 int btrfs_scan_one_device(int fd, const char *path,
183 struct btrfs_fs_devices **fs_devices_ret,
184 u64 *total_devs, u64 super_offset);
185 int btrfs_num_copies(struct btrfs_mapping_tree *map_tree, u64 logical, u64 len);
186 int btrfs_bootstrap_super_map(struct btrfs_mapping_tree *map_tree,
187 struct btrfs_fs_devices *fs_devices);
188 struct list_head *btrfs_scanned_uuids(void);
189 int btrfs_add_system_chunk(struct btrfs_trans_handle *trans,
190 struct btrfs_root *root, struct btrfs_key *key,
191 struct btrfs_chunk *chunk, int item_size);
192 int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset);
193 struct btrfs_device *
194 btrfs_find_device_by_devid(struct btrfs_fs_devices *fs_devices,
195 u64 devid, int instance);
196 struct btrfs_device *btrfs_find_device(struct btrfs_root *root, u64 devid,