mirror of
https://github.com/kdave/btrfs-progs
synced 2024-12-28 17:12:17 +00:00
851ef59b2c
This member is not used by anyone, just remove it. Reviewed-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: Qu Wenruo <wqu@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
320 lines
9.7 KiB
C
320 lines
9.7 KiB
C
/*
|
|
* 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_H__
|
|
#define __BTRFS_VOLUMES_H__
|
|
|
|
#include "kerncompat.h"
|
|
#include "kernel-shared/ctree.h"
|
|
#include "kernel-lib/sizes.h"
|
|
|
|
#define BTRFS_STRIPE_LEN SZ_64K
|
|
|
|
struct btrfs_device {
|
|
struct list_head dev_list;
|
|
struct btrfs_root *dev_root;
|
|
struct btrfs_fs_devices *fs_devices;
|
|
struct btrfs_fs_info *fs_info;
|
|
|
|
u64 total_ios;
|
|
|
|
int fd;
|
|
|
|
int writeable;
|
|
|
|
char *name;
|
|
|
|
/* these are read off the super block, only in the progs */
|
|
char *label;
|
|
u64 total_devs;
|
|
u64 super_bytes_used;
|
|
|
|
u64 generation;
|
|
|
|
struct btrfs_zoned_device_info *zone_info;
|
|
|
|
/* 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) */
|
|
u8 uuid[BTRFS_UUID_SIZE];
|
|
};
|
|
|
|
enum btrfs_chunk_allocation_policy {
|
|
BTRFS_CHUNK_ALLOC_REGULAR,
|
|
BTRFS_CHUNK_ALLOC_ZONED,
|
|
};
|
|
|
|
struct btrfs_fs_devices {
|
|
u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
|
|
u8 metadata_uuid[BTRFS_FSID_SIZE]; /* FS specific uuid */
|
|
|
|
/* the device with this id has the most recent copy of the super */
|
|
u64 latest_devid;
|
|
u64 latest_trans;
|
|
u64 lowest_devid;
|
|
|
|
u64 total_rw_bytes;
|
|
|
|
int latest_bdev;
|
|
int lowest_bdev;
|
|
struct list_head devices;
|
|
struct list_head list;
|
|
|
|
struct btrfs_fs_devices *seed;
|
|
|
|
enum btrfs_chunk_allocation_policy chunk_alloc_policy;
|
|
};
|
|
|
|
struct btrfs_bio_stripe {
|
|
struct btrfs_device *dev;
|
|
u64 physical;
|
|
};
|
|
|
|
struct btrfs_multi_bio {
|
|
u64 type;
|
|
int error;
|
|
int num_stripes;
|
|
struct btrfs_bio_stripe stripes[];
|
|
};
|
|
|
|
struct map_lookup {
|
|
struct cache_extent ce;
|
|
u64 type;
|
|
int io_align;
|
|
int io_width;
|
|
int stripe_len;
|
|
int sector_size;
|
|
int num_stripes;
|
|
int sub_stripes;
|
|
struct btrfs_bio_stripe stripes[];
|
|
};
|
|
|
|
struct btrfs_raid_attr {
|
|
int sub_stripes; /* sub_stripes info for map */
|
|
int dev_stripes; /* stripes per dev */
|
|
int devs_max; /* max devs to use */
|
|
int devs_min; /* min devs needed */
|
|
int tolerated_failures; /* max tolerated fail devs */
|
|
int devs_increment; /* ndevs has to be a multiple of this */
|
|
int ncopies; /* how many copies to data has */
|
|
int nparity; /* number of stripes worth of bytes to store
|
|
* parity information */
|
|
int mindev_error; /* error code if min devs requisite is unmet */
|
|
const char lower_name[8]; /* name of the profile in lower case*/
|
|
const char upper_name[8]; /* name of the profile in upper case*/
|
|
u64 bg_flag; /* block group flag of the raid */
|
|
};
|
|
|
|
extern const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES];
|
|
int btrfs_bg_type_to_nparity(u64 flags);
|
|
|
|
#define btrfs_multi_bio_size(n) (sizeof(struct btrfs_multi_bio) + \
|
|
(sizeof(struct btrfs_bio_stripe) * (n)))
|
|
#define btrfs_map_lookup_size(n) (sizeof(struct map_lookup) + \
|
|
(sizeof(struct btrfs_bio_stripe) * (n)))
|
|
|
|
/*
|
|
* Restriper's general type filter
|
|
*/
|
|
#define BTRFS_BALANCE_DATA (1ULL << 0)
|
|
#define BTRFS_BALANCE_SYSTEM (1ULL << 1)
|
|
#define BTRFS_BALANCE_METADATA (1ULL << 2)
|
|
|
|
#define BTRFS_BALANCE_TYPE_MASK (BTRFS_BALANCE_DATA | \
|
|
BTRFS_BALANCE_SYSTEM | \
|
|
BTRFS_BALANCE_METADATA)
|
|
|
|
#define BTRFS_BALANCE_FORCE (1ULL << 3)
|
|
#define BTRFS_BALANCE_RESUME (1ULL << 4)
|
|
|
|
/*
|
|
* Balance filters
|
|
*/
|
|
#define BTRFS_BALANCE_ARGS_PROFILES (1ULL << 0)
|
|
#define BTRFS_BALANCE_ARGS_USAGE (1ULL << 1)
|
|
#define BTRFS_BALANCE_ARGS_DEVID (1ULL << 2)
|
|
#define BTRFS_BALANCE_ARGS_DRANGE (1ULL << 3)
|
|
#define BTRFS_BALANCE_ARGS_VRANGE (1ULL << 4)
|
|
#define BTRFS_BALANCE_ARGS_LIMIT (1ULL << 5)
|
|
#define BTRFS_BALANCE_ARGS_LIMIT_RANGE (1ULL << 6)
|
|
#define BTRFS_BALANCE_ARGS_STRIPES_RANGE (1ULL << 7)
|
|
#define BTRFS_BALANCE_ARGS_USAGE_RANGE (1ULL << 10)
|
|
|
|
/*
|
|
* Profile changing flags. When SOFT is set we won't relocate chunk if
|
|
* it already has the target profile (even though it may be
|
|
* half-filled).
|
|
*/
|
|
#define BTRFS_BALANCE_ARGS_CONVERT (1ULL << 8)
|
|
#define BTRFS_BALANCE_ARGS_SOFT (1ULL << 9)
|
|
|
|
#define BTRFS_RAID5_P_STRIPE ((u64)-2)
|
|
#define BTRFS_RAID6_Q_STRIPE ((u64)-1)
|
|
|
|
/*
|
|
* Check if the given range cross stripes.
|
|
* To ensure kernel scrub won't causing bug on with METADATA in mixed
|
|
* block group
|
|
*
|
|
* Return 1 if the range crosses STRIPE boundary
|
|
* Return 0 if the range doesn't cross STRIPE boundary or it
|
|
* doesn't belong to any block group (no boundary to cross)
|
|
*/
|
|
static inline int check_crossing_stripes(struct btrfs_fs_info *fs_info,
|
|
u64 start, u64 len)
|
|
{
|
|
struct btrfs_block_group *bg_cache;
|
|
u64 bg_offset;
|
|
|
|
bg_cache = btrfs_lookup_block_group(fs_info, start);
|
|
/*
|
|
* Does not belong to block group, no boundary to cross
|
|
* although it's a bigger problem, but here we don't care.
|
|
*/
|
|
if (!bg_cache)
|
|
return 0;
|
|
bg_offset = start - bg_cache->start;
|
|
|
|
return (bg_offset / BTRFS_STRIPE_LEN !=
|
|
(bg_offset + len - 1) / BTRFS_STRIPE_LEN);
|
|
}
|
|
|
|
static inline u64 calc_stripe_length(u64 type, u64 length, int num_stripes)
|
|
{
|
|
u64 stripe_size;
|
|
|
|
if (type & BTRFS_BLOCK_GROUP_RAID0) {
|
|
stripe_size = length;
|
|
stripe_size /= num_stripes;
|
|
} else if (type & BTRFS_BLOCK_GROUP_RAID10) {
|
|
stripe_size = length * 2;
|
|
stripe_size /= num_stripes;
|
|
} else if (type & BTRFS_BLOCK_GROUP_RAID56_MASK) {
|
|
stripe_size = length;
|
|
stripe_size /= (num_stripes - btrfs_bg_type_to_nparity(type));
|
|
} else {
|
|
stripe_size = length;
|
|
}
|
|
return stripe_size;
|
|
}
|
|
|
|
int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
|
|
u64 logical, u64 *length, u64 *type,
|
|
struct btrfs_multi_bio **multi_ret, int mirror_num,
|
|
u64 **raid_map);
|
|
int btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
|
|
u64 logical, u64 *length,
|
|
struct btrfs_multi_bio **multi_ret, int mirror_num,
|
|
u64 **raid_map_ret);
|
|
int btrfs_next_bg(struct btrfs_fs_info *map_tree, u64 *logical,
|
|
u64 *size, u64 type);
|
|
static inline int btrfs_next_bg_metadata(struct btrfs_fs_info *fs_info,
|
|
u64 *logical, u64 *size)
|
|
{
|
|
return btrfs_next_bg(fs_info, logical, size,
|
|
BTRFS_BLOCK_GROUP_METADATA);
|
|
}
|
|
static inline int btrfs_next_bg_system(struct btrfs_fs_info *fs_info,
|
|
u64 *logical, u64 *size)
|
|
{
|
|
return btrfs_next_bg(fs_info, logical, size,
|
|
BTRFS_BLOCK_GROUP_SYSTEM);
|
|
}
|
|
int btrfs_rmap_block(struct btrfs_fs_info *fs_info,
|
|
u64 chunk_start, u64 physical, u64 **logical,
|
|
int *naddrs, int *stripe_len);
|
|
int btrfs_read_sys_array(struct btrfs_fs_info *fs_info);
|
|
int btrfs_read_chunk_tree(struct btrfs_fs_info *fs_info);
|
|
int btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
|
|
struct btrfs_fs_info *fs_info, u64 *start,
|
|
u64 *num_bytes, u64 type);
|
|
int btrfs_alloc_data_chunk(struct btrfs_trans_handle *trans,
|
|
struct btrfs_fs_info *fs_info, u64 *start, u64 num_bytes);
|
|
int btrfs_open_devices(struct btrfs_fs_info *fs_info,
|
|
struct btrfs_fs_devices *fs_devices, int flags);
|
|
int btrfs_close_devices(struct btrfs_fs_devices *fs_devices);
|
|
void btrfs_close_all_devices(void);
|
|
int btrfs_insert_dev_extent(struct btrfs_trans_handle *trans,
|
|
struct btrfs_device *device,
|
|
u64 chunk_offset, u64 num_bytes, u64 start);
|
|
int btrfs_add_device(struct btrfs_trans_handle *trans,
|
|
struct btrfs_fs_info *fs_info,
|
|
struct btrfs_device *device);
|
|
int btrfs_update_device(struct btrfs_trans_handle *trans,
|
|
struct btrfs_device *device);
|
|
int btrfs_scan_one_device(int fd, const char *path,
|
|
struct btrfs_fs_devices **fs_devices_ret,
|
|
u64 *total_devs, u64 super_offset, unsigned sbflags);
|
|
int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len);
|
|
struct list_head *btrfs_scanned_uuids(void);
|
|
int btrfs_add_system_chunk(struct btrfs_fs_info *fs_info, struct btrfs_key *key,
|
|
struct btrfs_chunk *chunk, int item_size);
|
|
int btrfs_chunk_readonly(struct btrfs_fs_info *fs_info, u64 chunk_offset);
|
|
struct btrfs_device *
|
|
btrfs_find_device_by_devid(struct btrfs_fs_devices *fs_devices,
|
|
u64 devid, int instance);
|
|
struct btrfs_device *btrfs_find_device(struct btrfs_fs_info *fs_info, u64 devid,
|
|
u8 *uuid, u8 *fsid);
|
|
int write_raid56_with_parity(struct btrfs_fs_info *info,
|
|
struct extent_buffer *eb,
|
|
struct btrfs_multi_bio *multi,
|
|
u64 stripe_len, u64 *raid_map);
|
|
int btrfs_check_chunk_valid(struct btrfs_fs_info *fs_info,
|
|
struct extent_buffer *leaf,
|
|
struct btrfs_chunk *chunk,
|
|
int slot, u64 logical);
|
|
u64 btrfs_stripe_length(struct btrfs_fs_info *fs_info,
|
|
struct extent_buffer *leaf,
|
|
struct btrfs_chunk *chunk);
|
|
int btrfs_fix_device_size(struct btrfs_fs_info *fs_info,
|
|
struct btrfs_device *device);
|
|
int btrfs_fix_super_size(struct btrfs_fs_info *fs_info);
|
|
int btrfs_fix_device_and_super_size(struct btrfs_fs_info *fs_info);
|
|
|
|
enum btrfs_raid_types btrfs_bg_flags_to_raid_index(u64 flags);
|
|
int btrfs_bg_type_to_factor(u64 flags);
|
|
const char *btrfs_bg_type_to_raid_name(u64 flags);
|
|
int btrfs_bg_type_to_tolerated_failures(u64 flags);
|
|
int btrfs_bg_type_to_devs_min(u64 flags);
|
|
int btrfs_bg_type_to_ncopies(u64 flags);
|
|
int btrfs_bg_type_to_nparity(u64 flags);
|
|
int btrfs_bg_type_to_sub_stripes(u64 flags);
|
|
u64 btrfs_bg_flags_for_device_num(int number);
|
|
bool btrfs_bg_type_is_stripey(u64 flags);
|
|
|
|
#endif
|