Contributors: 14
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Josef Whiter |
246 |
50.00% |
9 |
18.37% |
| Filipe David Borba Manana |
83 |
16.87% |
3 |
6.12% |
| David Sterba |
67 |
13.62% |
9 |
18.37% |
| Chris Mason |
33 |
6.71% |
9 |
18.37% |
| Zheng Yan |
17 |
3.46% |
4 |
8.16% |
| Jeff Mahoney |
10 |
2.03% |
2 |
4.08% |
| Miao Xie |
9 |
1.83% |
4 |
8.16% |
| Li Dongyang |
8 |
1.63% |
1 |
2.04% |
| Naohiro Aota |
5 |
1.02% |
2 |
4.08% |
| Liu Bo |
4 |
0.81% |
1 |
2.04% |
| Arne Jansen |
3 |
0.61% |
1 |
2.04% |
| Nikolay Borisov |
3 |
0.61% |
1 |
2.04% |
| Josef Bacik |
3 |
0.61% |
2 |
4.08% |
| Christoph Hellwig |
1 |
0.20% |
1 |
2.04% |
| Total |
492 |
|
49 |
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef BTRFS_BLOCK_RSV_H
#define BTRFS_BLOCK_RSV_H
#include <linux/types.h>
#include <linux/compiler.h>
#include <linux/spinlock.h>
struct btrfs_trans_handle;
struct btrfs_root;
struct btrfs_space_info;
struct btrfs_block_rsv;
struct btrfs_fs_info;
enum btrfs_reserve_flush_enum;
/*
* Types of block reserves
*/
enum btrfs_rsv_type {
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;
bool full;
bool failfast;
/* Block reserve type, one of BTRFS_BLOCK_RSV_* */
enum btrfs_rsv_type type:8;
/*
* 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, enum btrfs_rsv_type type);
void btrfs_init_root_block_rsv(struct btrfs_root *root);
struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info,
enum btrfs_rsv_type type);
void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info,
struct btrfs_block_rsv *rsv,
enum btrfs_rsv_type type);
void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info,
struct btrfs_block_rsv *rsv);
int btrfs_block_rsv_add(struct btrfs_fs_info *fs_info,
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_percent);
int btrfs_block_rsv_refill(struct btrfs_fs_info *fs_info,
struct btrfs_block_rsv *block_rsv, u64 num_bytes,
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);
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);
int btrfs_check_trunc_cache_free_space(struct btrfs_fs_info *fs_info,
struct btrfs_block_rsv *rsv);
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);
}
/*
* Fast path to check if the reserve is full, may be carefully used outside of
* locks.
*/
static inline bool btrfs_block_rsv_full(const struct btrfs_block_rsv *rsv)
{
return data_race(rsv->full);
}
/*
* Get the reserved mount of a block reserve in a context where getting a stale
* value is acceptable, instead of accessing it directly and trigger data race
* warning from KCSAN.
*/
static inline u64 btrfs_block_rsv_reserved(struct btrfs_block_rsv *rsv)
{
u64 ret;
spin_lock(&rsv->lock);
ret = rsv->reserved;
spin_unlock(&rsv->lock);
return ret;
}
/*
* Get the size of a block reserve in a context where getting a stale value is
* acceptable, instead of accessing it directly and trigger data race warning
* from KCSAN.
*/
static inline u64 btrfs_block_rsv_size(struct btrfs_block_rsv *rsv)
{
u64 ret;
spin_lock(&rsv->lock);
ret = rsv->size;
spin_unlock(&rsv->lock);
return ret;
}
#endif /* BTRFS_BLOCK_RSV_H */