[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

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_block_rsv_release(struct btrfs_fs_info *fs_info,
					   struct btrfs_block_rsv *block_rsv,
					   u64 num_bytes)
{
	__btrfs_block_rsv_release(fs_info, block_rsv, num_bytes, NULL);
}

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);
}

#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	*/
	12	enum {
	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;
	28	unsigned short full;
	29	unsigned short type;
	30	unsigned short failfast;
	31
	32	/*
	33	* Qgroup equivalent for @size @reserved
	34	*
	35	* Unlike normal @size/@reserved for inode rsv, qgroup doesn't care
	36	* about things like csum size nor how many tree blocks it will need to
	37	* reserve.
	38	*
	39	* Qgroup cares more about net change of the extent usage.
	40	*
	41	* So for one newly inserted file extent, in worst case it will cause
	42	* leaf split and level increase, nodesize for each file extent is
	43	* already too much.
	44	*
	45	* In short, qgroup_size/reserved is the upper limit of possible needed
	46	* qgroup metadata reservation.
	47	*/
	48	u64 qgroup_rsv_size;
	49	u64 qgroup_rsv_reserved;
	50	};
	51
	52	void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
	53	struct btrfs_block_rsv btrfs_alloc_block_rsv(struct btrfs_fs_info fs_info,
	54	unsigned short type);
	55	void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info,
	56	struct btrfs_block_rsv *rsv,
	57	unsigned short type);
	58	void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info,
	59	struct btrfs_block_rsv *rsv);
	60	int btrfs_block_rsv_add(struct btrfs_root *root,
	61	struct btrfs_block_rsv *block_rsv, u64 num_bytes,
	62	enum btrfs_reserve_flush_enum flush);
	63	int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor);
	64	int btrfs_block_rsv_refill(struct btrfs_root *root,
	65	struct btrfs_block_rsv *block_rsv, u64 min_reserved,
	66	enum btrfs_reserve_flush_enum flush);
	67	int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
	68	struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
	69	bool update_size);
	70	int btrfs_block_rsv_use_bytes(struct btrfs_block_rsv *block_rsv, u64 num_bytes);
71	int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
72	struct btrfs_block_rsv *dest, u64 num_bytes,
73	int min_factor);
0b50174a JB	74	void btrfs_block_rsv_add_bytes(struct btrfs_block_rsv *block_rsv,
0b50174a JB	75	u64 num_bytes, bool update_size);
fed14b32 JB	76	u64 __btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
	77	struct btrfs_block_rsv *block_rsv,
	78	u64 num_bytes, u64 *qgroup_to_release);
67f9c220 JB	79	void btrfs_update_global_block_rsv(struct btrfs_fs_info *fs_info);
	80	void btrfs_init_global_block_rsv(struct btrfs_fs_info *fs_info);
	81	void btrfs_release_global_block_rsv(struct btrfs_fs_info *fs_info);
	82	struct btrfs_block_rsv btrfs_use_block_rsv(struct btrfs_trans_handle trans,
	83	struct btrfs_root *root,
	84	u32 blocksize);
fed14b32 JB	85
	86	static inline void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
	87	struct btrfs_block_rsv *block_rsv,
	88	u64 num_bytes)
	89	{
	90	__btrfs_block_rsv_release(fs_info, block_rsv, num_bytes, NULL);
	91	}
d12ffdd1	92
67f9c220 JB	93	static inline void btrfs_unuse_block_rsv(struct btrfs_fs_info *fs_info,
	94	struct btrfs_block_rsv *block_rsv,
	95	u32 blocksize)
	96	{
	97	btrfs_block_rsv_add_bytes(block_rsv, blocksize, false);
	98	btrfs_block_rsv_release(fs_info, block_rsv, 0);
	99	}
	100
d12ffdd1	101	#endif /* BTRFS_BLOCK_RSV_H */