[people/ms/linux.git] / fs / btrfs / block-rsv.h

/* 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_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_factor);
int btrfs_block_rsv_refill(struct btrfs_fs_info *fs_info,
			   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 */
Commit	Line	Data
d12ffdd1 JB	1	/* SPDX-License-Identifier: GPL-2.0 */
	2
	3	#ifndef BTRFS_BLOCK_RSV_H
	4	#define BTRFS_BLOCK_RSV_H
	5
67f9c220	6	struct btrfs_trans_handle;
d12ffdd1 JB	7	enum btrfs_reserve_flush_enum;
	8
	9	/*
	10	* Types of block reserves
	11	*/
8bfc9b2c	12	enum btrfs_rsv_type {
d12ffdd1 JB	13	BTRFS_BLOCK_RSV_GLOBAL,
	14	BTRFS_BLOCK_RSV_DELALLOC,
	15	BTRFS_BLOCK_RSV_TRANS,
	16	BTRFS_BLOCK_RSV_CHUNK,
	17	BTRFS_BLOCK_RSV_DELOPS,
	18	BTRFS_BLOCK_RSV_DELREFS,
	19	BTRFS_BLOCK_RSV_EMPTY,
	20	BTRFS_BLOCK_RSV_TEMP,
	21	};
	22
	23	struct btrfs_block_rsv {
	24	u64 size;
	25	u64 reserved;
	26	struct btrfs_space_info *space_info;
	27	spinlock_t lock;
c70c2c5b	28	bool full;
710d5921	29	bool failfast;
8bfc9b2c DS	30	/* Block reserve type, one of BTRFS_BLOCK_RSV_* */
8bfc9b2c DS	31	enum btrfs_rsv_type type:8;
d12ffdd1 JB	32
	33	/*
	34	* Qgroup equivalent for @size @reserved
	35	*
	36	* Unlike normal @size/@reserved for inode rsv, qgroup doesn't care
	37	* about things like csum size nor how many tree blocks it will need to
	38	* reserve.
	39	*
	40	* Qgroup cares more about net change of the extent usage.
	41	*
	42	* So for one newly inserted file extent, in worst case it will cause
	43	* leaf split and level increase, nodesize for each file extent is
	44	* already too much.
	45	*
	46	* In short, qgroup_size/reserved is the upper limit of possible needed
	47	* qgroup metadata reservation.
	48	*/
	49	u64 qgroup_rsv_size;
	50	u64 qgroup_rsv_reserved;
	51	};
	52
8bfc9b2c	53	void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, enum btrfs_rsv_type type);
2e608bd1	54	void btrfs_init_root_block_rsv(struct btrfs_root *root);
d12ffdd1	55	struct btrfs_block_rsv btrfs_alloc_block_rsv(struct btrfs_fs_info fs_info,
8bfc9b2c	56	enum btrfs_rsv_type type);
d12ffdd1 JB	57	void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info,
d12ffdd1 JB	58	struct btrfs_block_rsv *rsv,
8bfc9b2c	59	enum btrfs_rsv_type type);
d12ffdd1 JB	60	void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info,
d12ffdd1 JB	61	struct btrfs_block_rsv *rsv);
9270501c	62	int btrfs_block_rsv_add(struct btrfs_fs_info *fs_info,
d12ffdd1 JB	63	struct btrfs_block_rsv *block_rsv, u64 num_bytes,
	64	enum btrfs_reserve_flush_enum flush);
	65	int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor);
9270501c	66	int btrfs_block_rsv_refill(struct btrfs_fs_info *fs_info,
d12ffdd1 JB	67	struct btrfs_block_rsv *block_rsv, u64 min_reserved,
	68	enum btrfs_reserve_flush_enum flush);
	69	int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
	70	struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
	71	bool update_size);
	72	int btrfs_block_rsv_use_bytes(struct btrfs_block_rsv *block_rsv, u64 num_bytes);
	73	int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
	74	struct btrfs_block_rsv *dest, u64 num_bytes,
	75	int min_factor);
0b50174a JB	76	void btrfs_block_rsv_add_bytes(struct btrfs_block_rsv *block_rsv,
0b50174a JB	77	u64 num_bytes, bool update_size);
63f018be	78	u64 btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
fed14b32 JB	79	struct btrfs_block_rsv *block_rsv,
fed14b32 JB	80	u64 num_bytes, u64 *qgroup_to_release);
67f9c220 JB	81	void btrfs_update_global_block_rsv(struct btrfs_fs_info *fs_info);
	82	void btrfs_init_global_block_rsv(struct btrfs_fs_info *fs_info);
	83	void btrfs_release_global_block_rsv(struct btrfs_fs_info *fs_info);
	84	struct btrfs_block_rsv btrfs_use_block_rsv(struct btrfs_trans_handle trans,
	85	struct btrfs_root *root,
	86	u32 blocksize);
67f9c220 JB	87	static inline void btrfs_unuse_block_rsv(struct btrfs_fs_info *fs_info,
	88	struct btrfs_block_rsv *block_rsv,
	89	u32 blocksize)
	90	{
	91	btrfs_block_rsv_add_bytes(block_rsv, blocksize, false);
63f018be	92	btrfs_block_rsv_release(fs_info, block_rsv, 0, NULL);
67f9c220 JB	93	}
67f9c220 JB	94
d12ffdd1	95	#endif /* BTRFS_BLOCK_RSV_H */