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 #include <linux/bio.h>
26 struct list_head dev_list
;
27 struct list_head dev_alloc_list
;
28 struct btrfs_root
*dev_root
;
29 struct buffer_head
*pending_io
;
37 struct block_device
*bdev
;
43 /* the internal btrfs device id */
46 /* size of the device */
52 /* optimal io alignment for this device */
55 /* optimal io width for this device */
58 /* minimal io size for this device */
61 /* type and info about this device */
64 /* physical drive uuid (or lvm uuid) */
65 u8 uuid
[BTRFS_UUID_SIZE
];
68 struct btrfs_fs_devices
{
69 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
71 /* the device with this id has the most recent coyp of the super */
76 struct block_device
*latest_bdev
;
77 /* all of the devices in the FS */
78 struct list_head devices
;
80 /* devices not currently being allocated */
81 struct list_head alloc_list
;
82 struct list_head list
;
86 struct btrfs_bio_stripe
{
87 struct btrfs_device
*dev
;
91 struct btrfs_multi_bio
{
92 atomic_t stripes_pending
;
98 struct btrfs_bio_stripe stripes
[];
101 #define btrfs_multi_bio_size(n) (sizeof(struct btrfs_multi_bio) + \
102 (sizeof(struct btrfs_bio_stripe) * (n)))
104 int btrfs_alloc_dev_extent(struct btrfs_trans_handle
*trans
,
105 struct btrfs_device
*device
,
106 u64 chunk_tree
, u64 chunk_objectid
,
108 u64 num_bytes
, u64
*start
);
109 int btrfs_map_block(struct btrfs_mapping_tree
*map_tree
, int rw
,
110 u64 logical
, u64
*length
,
111 struct btrfs_multi_bio
**multi_ret
, int mirror_num
);
112 int btrfs_read_sys_array(struct btrfs_root
*root
);
113 int btrfs_read_chunk_tree(struct btrfs_root
*root
);
114 int btrfs_alloc_chunk(struct btrfs_trans_handle
*trans
,
115 struct btrfs_root
*extent_root
, u64
*start
,
116 u64
*num_bytes
, u64 type
);
117 void btrfs_mapping_init(struct btrfs_mapping_tree
*tree
);
118 void btrfs_mapping_tree_free(struct btrfs_mapping_tree
*tree
);
119 int btrfs_map_bio(struct btrfs_root
*root
, int rw
, struct bio
*bio
,
121 int btrfs_read_super_device(struct btrfs_root
*root
, struct extent_buffer
*buf
);
122 int btrfs_open_devices(struct btrfs_fs_devices
*fs_devices
,
123 int flags
, void *holder
);
124 int btrfs_scan_one_device(const char *path
, int flags
, void *holder
,
125 struct btrfs_fs_devices
**fs_devices_ret
);
126 int btrfs_close_devices(struct btrfs_fs_devices
*fs_devices
);
127 int btrfs_close_extra_devices(struct btrfs_fs_devices
*fs_devices
);
128 int btrfs_add_device(struct btrfs_trans_handle
*trans
,
129 struct btrfs_root
*root
,
130 struct btrfs_device
*device
);
131 int btrfs_rm_device(struct btrfs_root
*root
, char *device_path
);
132 int btrfs_cleanup_fs_uuids(void);
133 int btrfs_num_copies(struct btrfs_mapping_tree
*map_tree
, u64 logical
, u64 len
);
134 int btrfs_unplug_page(struct btrfs_mapping_tree
*map_tree
,
135 u64 logical
, struct page
*page
);
136 int btrfs_grow_device(struct btrfs_trans_handle
*trans
,
137 struct btrfs_device
*device
, u64 new_size
);
138 struct btrfs_device
*btrfs_find_device(struct btrfs_root
*root
, u64 devid
,
140 int btrfs_shrink_device(struct btrfs_device
*device
, u64 new_size
);
141 int btrfs_init_new_device(struct btrfs_root
*root
, char *path
);
142 int btrfs_balance(struct btrfs_root
*dev_root
);
143 void btrfs_unlock_volumes(void);
144 void btrfs_lock_volumes(void);
This page took 0.03336 seconds and 5 git commands to generate.