/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef BTRFS_BLOCK_RSV_H
|
#define BTRFS_BLOCK_RSV_H
|
|
struct btrfs_trans_handle;
|
enum btrfs_reserve_flush_enum;
|
|
/*
|
* Types of block reserves
|
*/
|
enum {
|
BTRFS_BLOCK_RSV_GLOBAL,
|
BTRFS_BLOCK_RSV_DELALLOC,
|
BTRFS_BLOCK_RSV_TRANS,
|
BTRFS_BLOCK_RSV_CHUNK,
|
BTRFS_BLOCK_RSV_DELOPS,
|
BTRFS_BLOCK_RSV_DELREFS,
|
BTRFS_BLOCK_RSV_EMPTY,
|
BTRFS_BLOCK_RSV_TEMP,
|
};
|
|
struct btrfs_block_rsv {
|
u64 size;
|
u64 reserved;
|
struct btrfs_space_info *space_info;
|
spinlock_t lock;
|
unsigned short full;
|
unsigned short type;
|
unsigned short failfast;
|
|
/*
|
* Qgroup equivalent for @size @reserved
|
*
|
* Unlike normal @size/@reserved for inode rsv, qgroup doesn't care
|
* about things like csum size nor how many tree blocks it will need to
|
* reserve.
|
*
|
* Qgroup cares more about net change of the extent usage.
|
*
|
* So for one newly inserted file extent, in worst case it will cause
|
* leaf split and level increase, nodesize for each file extent is
|
* already too much.
|
*
|
* In short, qgroup_size/reserved is the upper limit of possible needed
|
* qgroup metadata reservation.
|
*/
|
u64 qgroup_rsv_size;
|
u64 qgroup_rsv_reserved;
|
};
|
|
void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
|
struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info,
|
unsigned short type);
|
void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info,
|
struct btrfs_block_rsv *rsv,
|
unsigned short type);
|
void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info,
|
struct btrfs_block_rsv *rsv);
|
int btrfs_block_rsv_add(struct btrfs_root *root,
|
struct btrfs_block_rsv *block_rsv, u64 num_bytes,
|
enum btrfs_reserve_flush_enum flush);
|
int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor);
|
int btrfs_block_rsv_refill(struct btrfs_root *root,
|
struct btrfs_block_rsv *block_rsv, u64 min_reserved,
|
enum btrfs_reserve_flush_enum flush);
|
int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
|
struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
|
bool update_size);
|
int btrfs_block_rsv_use_bytes(struct btrfs_block_rsv *block_rsv, u64 num_bytes);
|
int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
|
struct btrfs_block_rsv *dest, u64 num_bytes,
|
int min_factor);
|
void btrfs_block_rsv_add_bytes(struct btrfs_block_rsv *block_rsv,
|
u64 num_bytes, bool update_size);
|
u64 btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
|
struct btrfs_block_rsv *block_rsv,
|
u64 num_bytes, u64 *qgroup_to_release);
|
void btrfs_update_global_block_rsv(struct btrfs_fs_info *fs_info);
|
void btrfs_init_global_block_rsv(struct btrfs_fs_info *fs_info);
|
void btrfs_release_global_block_rsv(struct btrfs_fs_info *fs_info);
|
struct btrfs_block_rsv *btrfs_use_block_rsv(struct btrfs_trans_handle *trans,
|
struct btrfs_root *root,
|
u32 blocksize);
|
static inline void btrfs_unuse_block_rsv(struct btrfs_fs_info *fs_info,
|
struct btrfs_block_rsv *block_rsv,
|
u32 blocksize)
|
{
|
btrfs_block_rsv_add_bytes(block_rsv, blocksize, false);
|
btrfs_block_rsv_release(fs_info, block_rsv, 0, NULL);
|
}
|
|
#endif /* BTRFS_BLOCK_RSV_H */
|
