2008-03-25 03:01:56 +08:00
|
|
|
/*
|
|
|
|
* Copyright (C) 2007 Oracle. All rights reserved.
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or
|
|
|
|
* modify it under the terms of the GNU General Public
|
|
|
|
* License v2 as published by the Free Software Foundation.
|
|
|
|
*
|
|
|
|
* This program is distributed in the hope that it will be useful,
|
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
|
* General Public License for more details.
|
|
|
|
*
|
|
|
|
* You should have received a copy of the GNU General Public
|
|
|
|
* License along with this program; if not, write to the
|
|
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
|
|
* Boston, MA 021110-1307, USA.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#ifndef __BTRFS_VOLUMES_
|
|
|
|
#define __BTRFS_VOLUMES_
|
2008-04-04 04:29:03 +08:00
|
|
|
|
2008-04-10 04:28:12 +08:00
|
|
|
#include <linux/bio.h>
|
|
|
|
|
2008-04-11 04:19:33 +08:00
|
|
|
struct buffer_head;
|
2008-03-25 03:01:56 +08:00
|
|
|
struct btrfs_device {
|
|
|
|
struct list_head dev_list;
|
2008-04-22 21:22:07 +08:00
|
|
|
struct list_head dev_alloc_list;
|
2008-03-25 03:01:56 +08:00
|
|
|
struct btrfs_root *dev_root;
|
2008-04-11 04:19:33 +08:00
|
|
|
struct buffer_head *pending_io;
|
2008-04-22 21:22:07 +08:00
|
|
|
|
2008-04-11 04:19:33 +08:00
|
|
|
int barriers;
|
2008-04-22 21:22:07 +08:00
|
|
|
|
2008-04-04 04:29:03 +08:00
|
|
|
spinlock_t io_lock;
|
2008-03-25 03:01:56 +08:00
|
|
|
|
|
|
|
struct block_device *bdev;
|
|
|
|
|
2008-04-04 04:29:03 +08:00
|
|
|
u64 total_ios;
|
|
|
|
|
2008-03-25 03:02:07 +08:00
|
|
|
char *name;
|
|
|
|
|
2008-03-25 03:01:56 +08:00
|
|
|
/* the internal btrfs device id */
|
|
|
|
u64 devid;
|
|
|
|
|
|
|
|
/* size of the device */
|
|
|
|
u64 total_bytes;
|
|
|
|
|
|
|
|
/* bytes used */
|
|
|
|
u64 bytes_used;
|
|
|
|
|
|
|
|
/* optimal io alignment for this device */
|
|
|
|
u32 io_align;
|
|
|
|
|
|
|
|
/* optimal io width for this device */
|
|
|
|
u32 io_width;
|
|
|
|
|
|
|
|
/* minimal io size for this device */
|
|
|
|
u32 sector_size;
|
|
|
|
|
|
|
|
/* type and info about this device */
|
|
|
|
u64 type;
|
|
|
|
|
|
|
|
/* physical drive uuid (or lvm uuid) */
|
2008-04-16 03:41:47 +08:00
|
|
|
u8 uuid[BTRFS_UUID_SIZE];
|
2008-03-25 03:01:56 +08:00
|
|
|
};
|
|
|
|
|
2008-03-25 03:02:07 +08:00
|
|
|
struct btrfs_fs_devices {
|
|
|
|
u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
|
|
|
|
|
|
|
|
/* the device with this id has the most recent coyp of the super */
|
|
|
|
u64 latest_devid;
|
|
|
|
u64 latest_trans;
|
|
|
|
u64 lowest_devid;
|
|
|
|
u64 num_devices;
|
|
|
|
struct block_device *latest_bdev;
|
|
|
|
struct block_device *lowest_bdev;
|
2008-04-22 21:22:07 +08:00
|
|
|
/* all of the devices in the FS */
|
2008-03-25 03:02:07 +08:00
|
|
|
struct list_head devices;
|
2008-04-22 21:22:07 +08:00
|
|
|
|
|
|
|
/* devices not currently being allocated */
|
|
|
|
struct list_head alloc_list;
|
2008-03-25 03:02:07 +08:00
|
|
|
struct list_head list;
|
|
|
|
};
|
|
|
|
|
2008-04-10 04:28:12 +08:00
|
|
|
struct btrfs_bio_stripe {
|
|
|
|
struct btrfs_device *dev;
|
|
|
|
u64 physical;
|
|
|
|
};
|
|
|
|
|
|
|
|
struct btrfs_multi_bio {
|
|
|
|
atomic_t stripes_pending;
|
|
|
|
bio_end_io_t *end_io;
|
|
|
|
void *private;
|
|
|
|
int error;
|
|
|
|
int num_stripes;
|
|
|
|
struct btrfs_bio_stripe stripes[];
|
|
|
|
};
|
|
|
|
|
|
|
|
#define btrfs_multi_bio_size(n) (sizeof(struct btrfs_multi_bio) + \
|
|
|
|
(sizeof(struct btrfs_bio_stripe) * (n)))
|
|
|
|
|
2008-03-25 03:01:56 +08:00
|
|
|
int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans,
|
|
|
|
struct btrfs_device *device,
|
2008-04-16 03:41:47 +08:00
|
|
|
u64 chunk_tree, u64 chunk_objectid,
|
|
|
|
u64 chunk_offset,
|
|
|
|
u64 num_bytes, u64 *start);
|
2008-04-10 04:28:12 +08:00
|
|
|
int btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
|
|
|
|
u64 logical, u64 *length,
|
2008-04-10 04:28:12 +08:00
|
|
|
struct btrfs_multi_bio **multi_ret, int mirror_num);
|
2008-03-25 03:01:56 +08:00
|
|
|
int btrfs_read_sys_array(struct btrfs_root *root);
|
|
|
|
int btrfs_read_chunk_tree(struct btrfs_root *root);
|
|
|
|
int btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
|
|
|
|
struct btrfs_root *extent_root, u64 *start,
|
2008-03-25 03:01:59 +08:00
|
|
|
u64 *num_bytes, u64 type);
|
2008-03-25 03:01:56 +08:00
|
|
|
void btrfs_mapping_init(struct btrfs_mapping_tree *tree);
|
|
|
|
void btrfs_mapping_tree_free(struct btrfs_mapping_tree *tree);
|
2008-04-10 04:28:12 +08:00
|
|
|
int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio,
|
|
|
|
int mirror_num);
|
2008-03-25 03:02:07 +08:00
|
|
|
int btrfs_read_super_device(struct btrfs_root *root, struct extent_buffer *buf);
|
2008-03-25 03:02:07 +08:00
|
|
|
int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
|
|
|
|
int flags, void *holder);
|
|
|
|
int btrfs_scan_one_device(const char *path, int flags, void *holder,
|
|
|
|
struct btrfs_fs_devices **fs_devices_ret);
|
|
|
|
int btrfs_close_devices(struct btrfs_fs_devices *fs_devices);
|
|
|
|
int btrfs_add_device(struct btrfs_trans_handle *trans,
|
|
|
|
struct btrfs_root *root,
|
|
|
|
struct btrfs_device *device);
|
|
|
|
int btrfs_cleanup_fs_uuids(void);
|
2008-04-10 04:28:12 +08:00
|
|
|
int btrfs_num_copies(struct btrfs_mapping_tree *map_tree, u64 logical, u64 len);
|
2008-04-21 22:03:05 +08:00
|
|
|
int btrfs_unplug_page(struct btrfs_mapping_tree *map_tree,
|
|
|
|
u64 logical, struct page *page);
|
2008-03-25 03:01:56 +08:00
|
|
|
#endif
|