[mirror_ubuntu-jammy-kernel.git] / fs / btrfs / block-rsv.h

/* SPDX-License-Identifier: GPL-2.0 */

#ifndef BTRFS_BLOCK_RSV_H
#define BTRFS_BLOCK_RSV_H

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_release(struct btrfs_fs_info *fs_info,
			     struct btrfs_block_rsv *block_rsv,
			     u64 num_bytes);

#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
	6	enum btrfs_reserve_flush_enum;
	7
	8	/*
	9	* Types of block reserves
	10	*/
	11	enum {
	12	BTRFS_BLOCK_RSV_GLOBAL,
	13	BTRFS_BLOCK_RSV_DELALLOC,
	14	BTRFS_BLOCK_RSV_TRANS,
	15	BTRFS_BLOCK_RSV_CHUNK,
	16	BTRFS_BLOCK_RSV_DELOPS,
	17	BTRFS_BLOCK_RSV_DELREFS,
	18	BTRFS_BLOCK_RSV_EMPTY,
	19	BTRFS_BLOCK_RSV_TEMP,
	20	};
	21
	22	struct btrfs_block_rsv {
	23	u64 size;
	24	u64 reserved;
	25	struct btrfs_space_info *space_info;
	26	spinlock_t lock;
	27	unsigned short full;
	28	unsigned short type;
	29	unsigned short failfast;
	30
	31	/*
	32	* Qgroup equivalent for @size @reserved
	33	*
	34	* Unlike normal @size/@reserved for inode rsv, qgroup doesn't care
	35	* about things like csum size nor how many tree blocks it will need to
	36	* reserve.
	37	*
	38	* Qgroup cares more about net change of the extent usage.
	39	*
	40	* So for one newly inserted file extent, in worst case it will cause
	41	* leaf split and level increase, nodesize for each file extent is
	42	* already too much.
	43	*
	44	* In short, qgroup_size/reserved is the upper limit of possible needed
	45	* qgroup metadata reservation.
	46	*/
	47	u64 qgroup_rsv_size;
	48	u64 qgroup_rsv_reserved;
	49	};
	50
	51	void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
	52	struct btrfs_block_rsv btrfs_alloc_block_rsv(struct btrfs_fs_info fs_info,
	53	unsigned short type);
	54	void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info,
	55	struct btrfs_block_rsv *rsv,
	56	unsigned short type);
	57	void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info,
	58	struct btrfs_block_rsv *rsv);
	59	int btrfs_block_rsv_add(struct btrfs_root *root,
	60	struct btrfs_block_rsv *block_rsv, u64 num_bytes,
	61	enum btrfs_reserve_flush_enum flush);
	62	int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor);
	63	int btrfs_block_rsv_refill(struct btrfs_root *root,
	64	struct btrfs_block_rsv *block_rsv, u64 min_reserved,
65	enum btrfs_reserve_flush_enum flush);
66	int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
67	struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
68	bool update_size);
69	int btrfs_block_rsv_use_bytes(struct btrfs_block_rsv *block_rsv, u64 num_bytes);
70	int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
71	struct btrfs_block_rsv *dest, u64 num_bytes,
72	int min_factor);
73	void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
74	struct btrfs_block_rsv *block_rsv,
75	u64 num_bytes);
76
77	#endif /* BTRFS_BLOCK_RSV_H */