diff options
Diffstat (limited to 'fs/btrfs/block-rsv.h')
| -rw-r--r-- | fs/btrfs/block-rsv.h | 79 |
1 files changed, 65 insertions, 14 deletions
diff --git a/fs/btrfs/block-rsv.h b/fs/btrfs/block-rsv.h index 0b6ae5302837..79ae9d05cd91 100644 --- a/fs/btrfs/block-rsv.h +++ b/fs/btrfs/block-rsv.h @@ -3,19 +3,28 @@ #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 { +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_TREELOG, BTRFS_BLOCK_RSV_EMPTY, BTRFS_BLOCK_RSV_TEMP, }; @@ -25,9 +34,10 @@ struct btrfs_block_rsv { u64 reserved; struct btrfs_space_info *space_info; spinlock_t lock; - unsigned short full; - unsigned short type; - unsigned short failfast; + bool full; + bool failfast; + /* Block reserve type, one of BTRFS_BLOCK_RSV_* */ + enum btrfs_rsv_type type:8; /* * Qgroup equivalent for @size @reserved @@ -49,28 +59,26 @@ struct btrfs_block_rsv { u64 qgroup_rsv_reserved; }; -void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type); +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, - unsigned short type); + enum btrfs_rsv_type type); void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info, struct btrfs_block_rsv *rsv, - unsigned short type); + 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_root *root, +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_factor); -int btrfs_block_rsv_refill(struct btrfs_root *root, - struct btrfs_block_rsv *block_rsv, u64 min_reserved, +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); -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, @@ -82,6 +90,8 @@ 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(const 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) @@ -90,4 +100,45 @@ static inline void btrfs_unuse_block_rsv(struct btrfs_fs_info *fs_info, 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 */ |