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/*
* Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
* Copyright (c) 2010 David Chinner.
* Copyright (c) 2011 Christoph Hellwig.
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __XFS_EXTENT_BUSY_H__
#define __XFS_EXTENT_BUSY_H__
struct xfs_mount;
struct xfs_trans;
struct xfs_alloc_arg;
/*
* Busy block/extent entry. Indexed by a rbtree in perag to mark blocks that
* have been freed but whose transactions aren't committed to disk yet.
*
* Note that we use the transaction ID to record the transaction, not the
* transaction structure itself. See xfs_extent_busy_insert() for details.
*/
struct xfs_extent_busy {
struct rb_node rb_node; /* ag by-bno indexed search tree */
struct list_head list; /* transaction busy extent list */
xfs_agnumber_t agno;
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 */
};
void
xfs_extent_busy_insert(struct xfs_trans *tp, xfs_agnumber_t agno,
xfs_agblock_t bno, xfs_extlen_t len, unsigned int flags);
void
xfs_extent_busy_clear(struct xfs_mount *mp, struct list_head *list,
bool do_discard);
int
xfs_extent_busy_search(struct xfs_mount *mp, xfs_agnumber_t agno,
xfs_agblock_t bno, xfs_extlen_t len);
void
xfs_extent_busy_reuse(struct xfs_mount *mp, xfs_agnumber_t agno,
xfs_agblock_t fbno, xfs_extlen_t flen, bool userdata);
bool
xfs_extent_busy_trim(struct xfs_alloc_arg *args, xfs_agblock_t *bno,
xfs_extlen_t *len, unsigned *busy_gen);
void
xfs_extent_busy_flush(struct xfs_mount *mp, struct xfs_perag *pag,
unsigned busy_gen);
void
xfs_extent_busy_wait_all(struct xfs_mount *mp);
int
xfs_extent_busy_ag_cmp(void *priv, struct list_head *a, 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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