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Linux kernel mirror (for testing)
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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
23/*
24 * Busy block/extent entry. Indexed by a rbtree in perag to mark blocks that
25 * have been freed but whose transactions aren't committed to disk yet.
26 *
27 * Note that we use the transaction ID to record the transaction, not the
28 * transaction structure itself. See xfs_extent_busy_insert() for details.
29 */
30struct xfs_extent_busy {
31 struct rb_node rb_node; /* ag by-bno indexed search tree */
32 struct list_head list; /* transaction busy extent list */
33 xfs_agnumber_t agno;
34 xfs_agblock_t bno;
35 xfs_extlen_t length;
36 unsigned int flags;
37#define XFS_EXTENT_BUSY_DISCARDED 0x01 /* undergoing a discard op. */
38#define XFS_EXTENT_BUSY_SKIP_DISCARD 0x02 /* do not discard */
39};
40
41void
42xfs_extent_busy_insert(struct xfs_trans *tp, xfs_agnumber_t agno,
43 xfs_agblock_t bno, xfs_extlen_t len, unsigned int flags);
44
45void
46xfs_extent_busy_clear(struct xfs_mount *mp, struct list_head *list,
47 bool do_discard);
48
49int
50xfs_extent_busy_search(struct xfs_mount *mp, xfs_agnumber_t agno,
51 xfs_agblock_t bno, xfs_extlen_t len);
52
53void
54xfs_extent_busy_reuse(struct xfs_mount *mp, xfs_agnumber_t agno,
55 xfs_agblock_t fbno, xfs_extlen_t flen, bool userdata);
56
57void
58xfs_extent_busy_trim(struct xfs_alloc_arg *args, xfs_agblock_t bno,
59 xfs_extlen_t len, xfs_agblock_t *rbno, xfs_extlen_t *rlen);
60
61int
62xfs_extent_busy_ag_cmp(void *priv, struct list_head *a, 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__ */