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