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_perag;
13 struct xfs_trans;
14 struct xfs_alloc_arg;
15
16 /*
17 * Busy block/extent entry. Indexed by a rbtree in perag to mark blocks that
18 * have been freed but whose transactions aren't committed to disk yet.
19 *
20 * Note that we use the transaction ID to record the transaction, not the
21 * transaction structure itself. See xfs_extent_busy_insert() for details.
22 */
23 struct xfs_extent_busy {
24 struct rb_node rb_node; /* ag by-bno indexed search tree */
25 struct list_head list; /* transaction busy extent list */
26 xfs_agnumber_t agno;
27 xfs_agblock_t bno;
28 xfs_extlen_t length;
29 unsigned int flags;
30 #define XFS_EXTENT_BUSY_DISCARDED 0x01 /* undergoing a discard op. */
31 #define XFS_EXTENT_BUSY_SKIP_DISCARD 0x02 /* do not discard */
32 };
33
34 void
35 xfs_extent_busy_insert(struct xfs_trans *tp, struct xfs_perag *pag,
36 xfs_agblock_t bno, xfs_extlen_t len, unsigned int flags);
37
38 void
39 xfs_extent_busy_clear(struct xfs_mount *mp, struct list_head *list,
40 bool do_discard);
41
42 int
43 xfs_extent_busy_search(struct xfs_mount *mp, struct xfs_perag *pag,
44 xfs_agblock_t bno, xfs_extlen_t len);
45
46 void
47 xfs_extent_busy_reuse(struct xfs_mount *mp, struct xfs_perag *pag,
48 xfs_agblock_t fbno, xfs_extlen_t flen, bool userdata);
49
50 bool
51 xfs_extent_busy_trim(struct xfs_alloc_arg *args, xfs_agblock_t *bno,
52 xfs_extlen_t *len, unsigned *busy_gen);
53
54 void
55 xfs_extent_busy_flush(struct xfs_mount *mp, struct xfs_perag *pag,
56 unsigned busy_gen);
57
58 void
59 xfs_extent_busy_wait_all(struct xfs_mount *mp);
60
61 int
62 xfs_extent_busy_ag_cmp(void *priv, const struct list_head *a,
63 const struct list_head *b);
64
xfs_extent_busy_sort(struct list_head * list)65 static inline void xfs_extent_busy_sort(struct list_head *list)
66 {
67 list_sort(NULL, list, xfs_extent_busy_ag_cmp);
68 }
69
70 #endif /* __XFS_EXTENT_BUSY_H__ */
71