Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
xfs_extent_busy.h
Go to the documentation of this file.
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  */
31  struct rb_node rb_node; /* ag by-bno indexed search tree */
32  struct list_head list; /* transaction busy extent list */
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 
41 void
42 xfs_extent_busy_insert(struct xfs_trans *tp, xfs_agnumber_t agno,
43  xfs_agblock_t bno, xfs_extlen_t len, unsigned int flags);
44 
45 void
46 xfs_extent_busy_clear(struct xfs_mount *mp, struct list_head *list,
47  bool do_discard);
48 
49 int
50 xfs_extent_busy_search(struct xfs_mount *mp, xfs_agnumber_t agno,
51  xfs_agblock_t bno, xfs_extlen_t len);
52 
53 void
54 xfs_extent_busy_reuse(struct xfs_mount *mp, xfs_agnumber_t agno,
55  xfs_agblock_t fbno, xfs_extlen_t flen, bool userdata);
56 
57 void
59  xfs_extlen_t len, xfs_agblock_t *rbno, xfs_extlen_t *rlen);
60 
61 int
62 xfs_extent_busy_ag_cmp(void *priv, struct list_head *a, struct list_head *b);
63 
64 static inline void xfs_extent_busy_sort(struct list_head *list)
65 {
67 }
68 
69 #endif /* __XFS_EXTENT_BUSY_H__ */