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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
* Copyright (c) 2010 David Chinner.
* Copyright (c) 2011 Christoph Hellwig.
* All Rights Reserved.
*/
#ifndef __XFS_EXTENT_BUSY_H__
#define __XFS_EXTENT_BUSY_H__
struct xfs_group;
struct xfs_mount;
struct xfs_trans;
/*
* Busy block/extent entry. Indexed by a rbtree in the group to mark blocks
* that have been freed but whose transactions aren't committed to disk yet.
*/
struct xfs_extent_busy {
struct rb_node rb_node; /* group by-bno indexed search tree */
struct list_head list; /* transaction busy extent list */
struct xfs_group *group;
xfs_agblock_t bno;
xfs_extlen_t length;
unsigned int flags;
#define XFS_EXTENT_BUSY_DISCARDED 0x01 /* undergoing a discard op. */
#define XFS_EXTENT_BUSY_SKIP_DISCARD 0x02 /* do not discard */
};
/*
* List used to track groups of related busy extents all the way through
* to discard completion.
*/
struct xfs_busy_extents {
struct list_head extent_list;
struct work_struct endio_work;
/*
* Owner is the object containing the struct xfs_busy_extents to free
* once the busy extents have been processed. If only the
* xfs_busy_extents object needs freeing, then point this at itself.
*/
void *owner;
};
void xfs_extent_busy_insert(struct xfs_trans *tp, struct xfs_group *xg,
xfs_agblock_t bno, xfs_extlen_t len, unsigned int flags);
void xfs_extent_busy_insert_discard(struct xfs_group *xg, xfs_agblock_t bno,
xfs_extlen_t len, struct list_head *busy_list);
void xfs_extent_busy_clear(struct list_head *list, bool do_discard);
int xfs_extent_busy_search(struct xfs_group *xg, xfs_agblock_t bno,
xfs_extlen_t len);
void xfs_extent_busy_reuse(struct xfs_group *xg, xfs_agblock_t fbno,
xfs_extlen_t flen, bool userdata);
bool xfs_extent_busy_trim(struct xfs_group *xg, xfs_extlen_t minlen,
xfs_extlen_t maxlen, xfs_agblock_t *bno, xfs_extlen_t *len,
unsigned *busy_gen);
int xfs_extent_busy_flush(struct xfs_trans *tp, struct xfs_group *xg,
unsigned busy_gen, uint32_t alloc_flags);
void xfs_extent_busy_wait_all(struct xfs_mount *mp);
bool xfs_extent_busy_list_empty(struct xfs_group *xg, unsigned int *busy_gen);
struct xfs_extent_busy_tree *xfs_extent_busy_alloc(void);
int xfs_extent_busy_ag_cmp(void *priv, const struct list_head *a,
const struct list_head *b);
static inline void xfs_extent_busy_sort(struct list_head *list)
{
list_sort(NULL, list, xfs_extent_busy_ag_cmp);
}
#endif /* __XFS_EXTENT_BUSY_H__ */
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