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 struct xfs_extent_busy {
21 struct rb_node rb_node; /* ag by-bno indexed search tree */
22 struct list_head list; /* transaction busy extent list */
23 xfs_agnumber_t agno;
24 xfs_agblock_t bno;
25 xfs_extlen_t length;
26 unsigned int flags;
27 #define XFS_EXTENT_BUSY_DISCARDED 0x01 /* undergoing a discard op. */
28 #define XFS_EXTENT_BUSY_SKIP_DISCARD 0x02 /* do not discard */
29 };
30
31 /*
32 * List used to track groups of related busy extents all the way through
33 * to discard completion.
34 */
35 struct xfs_busy_extents {
36 struct xfs_mount *mount;
37 struct list_head extent_list;
38 struct work_struct endio_work;
39
40 /*
41 * Owner is the object containing the struct xfs_busy_extents to free
42 * once the busy extents have been processed. If only the
43 * xfs_busy_extents object needs freeing, then point this at itself.
44 */
45 void *owner;
46 };
47
48 void
49 xfs_extent_busy_insert(struct xfs_trans *tp, struct xfs_perag *pag,
50 xfs_agblock_t bno, xfs_extlen_t len, unsigned int flags);
51
52 void
53 xfs_extent_busy_insert_discard(struct xfs_perag *pag, xfs_agblock_t bno,
54 xfs_extlen_t len, struct list_head *busy_list);
55
56 void
57 xfs_extent_busy_clear(struct xfs_mount *mp, struct list_head *list,
58 bool do_discard);
59
60 int
61 xfs_extent_busy_search(struct xfs_mount *mp, struct xfs_perag *pag,
62 xfs_agblock_t bno, xfs_extlen_t len);
63
64 void
65 xfs_extent_busy_reuse(struct xfs_mount *mp, struct xfs_perag *pag,
66 xfs_agblock_t fbno, xfs_extlen_t flen, bool userdata);
67
68 bool
69 xfs_extent_busy_trim(struct xfs_alloc_arg *args, xfs_agblock_t *bno,
70 xfs_extlen_t *len, unsigned *busy_gen);
71
72 int
73 xfs_extent_busy_flush(struct xfs_trans *tp, struct xfs_perag *pag,
74 unsigned busy_gen, uint32_t alloc_flags);
75
76 void
77 xfs_extent_busy_wait_all(struct xfs_mount *mp);
78
79 int
80 xfs_extent_busy_ag_cmp(void *priv, const struct list_head *a,
81 const struct list_head *b);
82
83 static inline void xfs_extent_busy_sort(struct list_head *list)
84 {
85 list_sort(NULL, list, xfs_extent_busy_ag_cmp);
86 }
87
88 bool xfs_extent_busy_list_empty(struct xfs_perag *pag);
89
90 #endif /* __XFS_EXTENT_BUSY_H__ */
91
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