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_fs_devices *fs_devices;
34 /* these are read off the super block, only in the progs */
39 /* the internal btrfs device id */
42 /* size of the device */
48 /* optimal io alignment for this device */
51 /* optimal io width for this device */
54 /* minimal io size for this device */
57 /* type and info about this device */
60 /* physical drive uuid (or lvm uuid) */
61 u8 uuid[BTRFS_UUID_SIZE];
64 struct btrfs_fs_devices {
65 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
67 /* the device with this id has the most recent coyp of the super */
73 struct list_head devices;
74 struct list_head list;
77 struct btrfs_fs_devices *seed;
80 struct btrfs_bio_stripe {
81 struct btrfs_device *dev;
85 struct btrfs_multi_bio {
88 struct btrfs_bio_stripe stripes[];
91 #define btrfs_multi_bio_size(n) (sizeof(struct btrfs_multi_bio) + \
92 (sizeof(struct btrfs_bio_stripe) * (n)))
94 int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans,
95 struct btrfs_device *device,
96 u64 chunk_tree, u64 chunk_objectid,
98 u64 num_bytes, u64 *start);
99 int btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
100 u64 logical, u64 *length,
101 struct btrfs_multi_bio **multi_ret, int mirror_num);
102 int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree,
103 u64 chunk_start, u64 physical, u64 devid,
104 u64 **logical, int *naddrs, int *stripe_len);
105 int btrfs_read_sys_array(struct btrfs_root *root);
106 int btrfs_read_chunk_tree(struct btrfs_root *root);
107 int btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
108 struct btrfs_root *extent_root, u64 *start,
109 u64 *num_bytes, u64 type);
110 int btrfs_read_super_device(struct btrfs_root *root, struct extent_buffer *buf);
111 int btrfs_add_device(struct btrfs_trans_handle *trans,
112 struct btrfs_root *root,
113 struct btrfs_device *device);
114 int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
116 int btrfs_close_devices(struct btrfs_fs_devices *fs_devices);
117 int btrfs_add_device(struct btrfs_trans_handle *trans,
118 struct btrfs_root *root,
119 struct btrfs_device *device);
120 int btrfs_update_device(struct btrfs_trans_handle *trans,
121 struct btrfs_device *device);
122 int btrfs_scan_one_device(int fd, const char *path,
123 struct btrfs_fs_devices **fs_devices_ret,
124 u64 *total_devs, u64 super_offset);
125 int btrfs_num_copies(struct btrfs_mapping_tree *map_tree, u64 logical, u64 len);
126 int btrfs_bootstrap_super_map(struct btrfs_mapping_tree *map_tree,
127 struct btrfs_fs_devices *fs_devices);
128 struct list_head *btrfs_scanned_uuids(void);
129 int btrfs_add_system_chunk(struct btrfs_trans_handle *trans,
130 struct btrfs_root *root, struct btrfs_key *key,
131 struct btrfs_chunk *chunk, int item_size);
132 int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset);