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 struct xfs_mount;
24 struct xfs_trans;
25 struct 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 */
34 struct 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
45 void
46 xfs_extent_busy_insert(struct xfs_trans *tp, xfs_agnumber_t agno,
47 xfs_agblock_t bno, xfs_extlen_t len, unsigned int flags);
48
49 void
50 xfs_extent_busy_clear(struct xfs_mount *mp, struct list_head *list,
51 bool do_discard);
52
53 int
54 xfs_extent_busy_search(struct xfs_mount *mp, xfs_agnumber_t agno,
55 xfs_agblock_t bno, xfs_extlen_t len);
56
57 void
58 xfs_extent_busy_reuse(struct xfs_mount *mp, xfs_agnumber_t agno,
59 xfs_agblock_t fbno, xfs_extlen_t flen, bool userdata);
60
61 void
62 xfs_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
65 int
66 xfs_extent_busy_ag_cmp(void *priv, struct list_head *a, struct list_head *b);
67
xfs_extent_busy_sort(struct list_head * list)68 static 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