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
11 struct xfs_mount;
12 struct xfs_trans;
13 struct xfs_alloc_arg;
14
15 /*
16 * Busy block/extent entry. Indexed by a rbtree in perag to mark blocks that
17 * have been freed but whose transactions aren't committed to disk yet.
18 *
19 * Note that we use the transaction ID to record the transaction, not the
20 * transaction structure itself. See xfs_extent_busy_insert() for details.
21 */
22 struct xfs_extent_busy {
23 struct rb_node rb_node; /* ag by-bno indexed search tree */
24 struct list_head list; /* transaction busy extent list */
25 xfs_agnumber_t agno;
26 xfs_agblock_t bno;
27 xfs_extlen_t length;
28 unsigned int flags;
29 #define XFS_EXTENT_BUSY_DISCARDED 0x01 /* undergoing a discard op. */
30 #define XFS_EXTENT_BUSY_SKIP_DISCARD 0x02 /* do not discard */
31 };
32
33 void
34 xfs_extent_busy_insert(struct xfs_trans *tp, xfs_agnumber_t agno,
35 xfs_agblock_t bno, xfs_extlen_t len, unsigned int flags);
36
37 void
38 xfs_extent_busy_clear(struct xfs_mount *mp, struct list_head *list,
39 bool do_discard);
40
41 int
42 xfs_extent_busy_search(struct xfs_mount *mp, xfs_agnumber_t agno,
43 xfs_agblock_t bno, xfs_extlen_t len);
44
45 void
46 xfs_extent_busy_reuse(struct xfs_mount *mp, xfs_agnumber_t agno,
47 xfs_agblock_t fbno, xfs_extlen_t flen, bool userdata);
48
49 bool
50 xfs_extent_busy_trim(struct xfs_alloc_arg *args, xfs_agblock_t *bno,
51 xfs_extlen_t *len, unsigned *busy_gen);
52
53 void
54 xfs_extent_busy_flush(struct xfs_mount *mp, struct xfs_perag *pag,
55 unsigned busy_gen);
56
57 void
58 xfs_extent_busy_wait_all(struct xfs_mount *mp);
59
60 int
61 xfs_extent_busy_ag_cmp(void *priv, struct list_head *a, struct list_head *b);
62
xfs_extent_busy_sort(struct list_head * list)63 static inline void xfs_extent_busy_sort(struct list_head *list)
64 {
65 list_sort(NULL, list, xfs_extent_busy_ag_cmp);
66 }
67
68 #endif /* __XFS_EXTENT_BUSY_H__ */
69