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_perag;
13struct xfs_trans;
14struct 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 */
23struct 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
34void
35xfs_extent_busy_insert(struct xfs_trans *tp, struct xfs_perag *pag,
36	xfs_agblock_t bno, xfs_extlen_t len, unsigned int flags);
37
38void
39xfs_extent_busy_clear(struct xfs_mount *mp, struct list_head *list,
40	bool do_discard);
41
42int
43xfs_extent_busy_search(struct xfs_mount *mp, struct xfs_perag *pag,
44	xfs_agblock_t bno, xfs_extlen_t len);
45
46void
47xfs_extent_busy_reuse(struct xfs_mount *mp, struct xfs_perag *pag,
48	xfs_agblock_t fbno, xfs_extlen_t flen, bool userdata);
49
50bool
51xfs_extent_busy_trim(struct xfs_alloc_arg *args, xfs_agblock_t *bno,
52		xfs_extlen_t *len, unsigned *busy_gen);
53
54void
55xfs_extent_busy_flush(struct xfs_mount *mp, struct xfs_perag *pag,
56	unsigned busy_gen);
57
58void
59xfs_extent_busy_wait_all(struct xfs_mount *mp);
60
61int
62xfs_extent_busy_ag_cmp(void *priv, const struct list_head *a,
63	const struct list_head *b);
64
65static 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__ */