mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 10:50:53 +07:00
58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (C) 2012 Fusion-io All rights reserved.
|
|
* Copyright (C) 2012 Intel Corp. All rights reserved.
|
|
*/
|
|
|
|
#ifndef BTRFS_RAID56_H
|
|
#define BTRFS_RAID56_H
|
|
|
|
static inline int nr_parity_stripes(const struct map_lookup *map)
|
|
{
|
|
if (map->type & BTRFS_BLOCK_GROUP_RAID5)
|
|
return 1;
|
|
else if (map->type & BTRFS_BLOCK_GROUP_RAID6)
|
|
return 2;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static inline int nr_data_stripes(const struct map_lookup *map)
|
|
{
|
|
return map->num_stripes - nr_parity_stripes(map);
|
|
}
|
|
#define RAID5_P_STRIPE ((u64)-2)
|
|
#define RAID6_Q_STRIPE ((u64)-1)
|
|
|
|
#define is_parity_stripe(x) (((x) == RAID5_P_STRIPE) || \
|
|
((x) == RAID6_Q_STRIPE))
|
|
|
|
struct btrfs_raid_bio;
|
|
struct btrfs_device;
|
|
|
|
int raid56_parity_recover(struct btrfs_fs_info *fs_info, struct bio *bio,
|
|
struct btrfs_bio *bbio, u64 stripe_len,
|
|
int mirror_num, int generic_io);
|
|
int raid56_parity_write(struct btrfs_fs_info *fs_info, struct bio *bio,
|
|
struct btrfs_bio *bbio, u64 stripe_len);
|
|
|
|
void raid56_add_scrub_pages(struct btrfs_raid_bio *rbio, struct page *page,
|
|
u64 logical);
|
|
|
|
struct btrfs_raid_bio *
|
|
raid56_parity_alloc_scrub_rbio(struct btrfs_fs_info *fs_info, struct bio *bio,
|
|
struct btrfs_bio *bbio, u64 stripe_len,
|
|
struct btrfs_device *scrub_dev,
|
|
unsigned long *dbitmap, int stripe_nsectors);
|
|
void raid56_parity_submit_scrub_rbio(struct btrfs_raid_bio *rbio);
|
|
|
|
struct btrfs_raid_bio *
|
|
raid56_alloc_missing_rbio(struct btrfs_fs_info *fs_info, struct bio *bio,
|
|
struct btrfs_bio *bbio, u64 length);
|
|
void raid56_submit_missing_rbio(struct btrfs_raid_bio *rbio);
|
|
|
|
int btrfs_alloc_stripe_hash_table(struct btrfs_fs_info *info);
|
|
void btrfs_free_stripe_hash_table(struct btrfs_fs_info *info);
|
|
|
|
#endif
|