1/*
2 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
3 * Copyright (c) 2010 David Chinner.
4 * Copyright (c) 2011 Christoph Hellwig.
5 * All Rights Reserved.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it would be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write the Free Software Foundation,
18 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
19 */
20#ifndef __XFS_EXTENT_BUSY_H__
21#define	__XFS_EXTENT_BUSY_H__
22
23struct xfs_mount;
24struct xfs_trans;
25struct xfs_alloc_arg;
26
27/*
28 * Busy block/extent entry.  Indexed by a rbtree in perag to mark blocks that
29 * have been freed but whose transactions aren't committed to disk yet.
30 *
31 * Note that we use the transaction ID to record the transaction, not the
32 * transaction structure itself. See xfs_extent_busy_insert() for details.
33 */
34struct xfs_extent_busy {
35	struct rb_node	rb_node;	/* ag by-bno indexed search tree */
36	struct list_head list;		/* transaction busy extent list */
37	xfs_agnumber_t	agno;
38	xfs_agblock_t	bno;
39	xfs_extlen_t	length;
40	unsigned int	flags;
41#define XFS_EXTENT_BUSY_DISCARDED	0x01	/* undergoing a discard op. */
42#define XFS_EXTENT_BUSY_SKIP_DISCARD	0x02	/* do not discard */
43};
44
45void
46xfs_extent_busy_insert(struct xfs_trans *tp, xfs_agnumber_t agno,
47	xfs_agblock_t bno, xfs_extlen_t len, unsigned int flags);
48
49void
50xfs_extent_busy_clear(struct xfs_mount *mp, struct list_head *list,
51	bool do_discard);
52
53int
54xfs_extent_busy_search(struct xfs_mount *mp, xfs_agnumber_t agno,
55	xfs_agblock_t bno, xfs_extlen_t len);
56
57void
58xfs_extent_busy_reuse(struct xfs_mount *mp, xfs_agnumber_t agno,
59	xfs_agblock_t fbno, xfs_extlen_t flen, bool userdata);
60
61void
62xfs_extent_busy_trim(struct xfs_alloc_arg *args, xfs_agblock_t bno,
63	xfs_extlen_t len, xfs_agblock_t *rbno, xfs_extlen_t *rlen);
64
65int
66xfs_extent_busy_ag_cmp(void *priv, struct list_head *a, struct list_head *b);
67
68static inline void xfs_extent_busy_sort(struct list_head *list)
69{
70	list_sort(NULL, list, xfs_extent_busy_ag_cmp);
71}
72
73#endif /* __XFS_EXTENT_BUSY_H__ */
74