[linux-block.git] / fs / xfs / xfs_extent_busy.h

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
 * Copyright (c) 2010 David Chinner.
 * Copyright (c) 2011 Christoph Hellwig.
 * All Rights Reserved.
 */
#ifndef __XFS_EXTENT_BUSY_H__
#define	__XFS_EXTENT_BUSY_H__

struct xfs_mount;
struct xfs_perag;
struct xfs_trans;
struct xfs_alloc_arg;

/*
 * Busy block/extent entry.  Indexed by a rbtree in perag to mark blocks that
 * have been freed but whose transactions aren't committed to disk yet.
 *
 * Note that we use the transaction ID to record the transaction, not the
 * transaction structure itself. See xfs_extent_busy_insert() for details.
 */
struct xfs_extent_busy {
	struct rb_node	rb_node;	/* ag by-bno indexed search tree */
	struct list_head list;		/* transaction busy extent list */
	xfs_agnumber_t	agno;
	xfs_agblock_t	bno;
	xfs_extlen_t	length;
	unsigned int	flags;
#define XFS_EXTENT_BUSY_DISCARDED	0x01	/* undergoing a discard op. */
#define XFS_EXTENT_BUSY_SKIP_DISCARD	0x02	/* do not discard */
};

void
xfs_extent_busy_insert(struct xfs_trans *tp, struct xfs_perag *pag,
	xfs_agblock_t bno, xfs_extlen_t len, unsigned int flags);

void
xfs_extent_busy_clear(struct xfs_mount *mp, struct list_head *list,
	bool do_discard);

int
xfs_extent_busy_search(struct xfs_mount *mp, struct xfs_perag *pag,
	xfs_agblock_t bno, xfs_extlen_t len);

void
xfs_extent_busy_reuse(struct xfs_mount *mp, struct xfs_perag *pag,
	xfs_agblock_t fbno, xfs_extlen_t flen, bool userdata);

bool
xfs_extent_busy_trim(struct xfs_alloc_arg *args, xfs_agblock_t *bno,
		xfs_extlen_t *len, unsigned *busy_gen);

void
xfs_extent_busy_flush(struct xfs_mount *mp, struct xfs_perag *pag,
	unsigned busy_gen);

void
xfs_extent_busy_wait_all(struct xfs_mount *mp);

int
xfs_extent_busy_ag_cmp(void *priv, const struct list_head *a,
	const struct list_head *b);

static inline void xfs_extent_busy_sort(struct list_head *list)
{
	list_sort(NULL, list, xfs_extent_busy_ag_cmp);
}

#endif /* __XFS_EXTENT_BUSY_H__ */
Commit	Line	Data
	1	// SPDX-License-Identifier: GPL-2.0
	2	/*
	3	* Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
	4	* Copyright (c) 2010 David Chinner.
	5	* Copyright (c) 2011 Christoph Hellwig.
	6	* All Rights Reserved.
	7	*/
	8	#ifndef __XFS_EXTENT_BUSY_H__
	9	#define __XFS_EXTENT_BUSY_H__
	10
	11	struct xfs_mount;
	12	struct xfs_perag;
	13	struct xfs_trans;
	14	struct xfs_alloc_arg;
	15
	16	/*
	17	* Busy block/extent entry. Indexed by a rbtree in perag to mark blocks that
	18	* have been freed but whose transactions aren't committed to disk yet.
	19	*
	20	* Note that we use the transaction ID to record the transaction, not the
	21	* transaction structure itself. See xfs_extent_busy_insert() for details.
	22	*/
	23	struct xfs_extent_busy {
	24	struct rb_node rb_node; /* ag by-bno indexed search tree */
	25	struct list_head list; /* transaction busy extent list */
	26	xfs_agnumber_t agno;
	27	xfs_agblock_t bno;
	28	xfs_extlen_t length;
	29	unsigned int flags;
	30	#define XFS_EXTENT_BUSY_DISCARDED 0x01 /* undergoing a discard op. */
	31	#define XFS_EXTENT_BUSY_SKIP_DISCARD 0x02 /* do not discard */
	32	};
	33
	34	void
	35	xfs_extent_busy_insert(struct xfs_trans tp, struct xfs_perag pag,
	36	xfs_agblock_t bno, xfs_extlen_t len, unsigned int flags);
	37
	38	void
	39	xfs_extent_busy_clear(struct xfs_mount mp, struct list_head list,
	40	bool do_discard);
	41
	42	int
	43	xfs_extent_busy_search(struct xfs_mount mp, struct xfs_perag pag,
	44	xfs_agblock_t bno, xfs_extlen_t len);
	45
	46	void
	47	xfs_extent_busy_reuse(struct xfs_mount mp, struct xfs_perag pag,
	48	xfs_agblock_t fbno, xfs_extlen_t flen, bool userdata);
	49
	50	bool
	51	xfs_extent_busy_trim(struct xfs_alloc_arg args, xfs_agblock_t bno,
	52	xfs_extlen_t len, unsigned busy_gen);
	53
	54	void
	55	xfs_extent_busy_flush(struct xfs_mount mp, struct xfs_perag pag,
	56	unsigned busy_gen);
	57
	58	void
	59	xfs_extent_busy_wait_all(struct xfs_mount *mp);
	60
	61	int
	62	xfs_extent_busy_ag_cmp(void priv, const struct list_head a,
	63	const struct list_head *b);
	64
	65	static inline void xfs_extent_busy_sort(struct list_head *list)
	66	{
	67	list_sort(NULL, list, xfs_extent_busy_ag_cmp);
	68	}
	69
	70	#endif /* __XFS_EXTENT_BUSY_H__ */