LXR linux/fs/xfs/xfs_extent

   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
  11struct xfs_mount;
  12struct xfs_trans;
  13struct 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 */
  22struct 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
  33void
  34xfs_extent_busy_insert(struct xfs_trans *tp, xfs_agnumber_t agno,
  35        xfs_agblock_t bno, xfs_extlen_t len, unsigned int flags);
  36
  37void
  38xfs_extent_busy_clear(struct xfs_mount *mp, struct list_head *list,
  39        bool do_discard);
  40
  41int
  42xfs_extent_busy_search(struct xfs_mount *mp, xfs_agnumber_t agno,
  43        xfs_agblock_t bno, xfs_extlen_t len);
  44
  45void
  46xfs_extent_busy_reuse(struct xfs_mount *mp, xfs_agnumber_t agno,
  47        xfs_agblock_t fbno, xfs_extlen_t flen, bool userdata);
  48
  49bool
  50xfs_extent_busy_trim(struct xfs_alloc_arg *args, xfs_agblock_t *bno,
  51                xfs_extlen_t *len, unsigned *busy_gen);
  52
  53void
  54xfs_extent_busy_flush(struct xfs_mount *mp, struct xfs_perag *pag,
  55        unsigned busy_gen);
  56
  57void
  58xfs_extent_busy_wait_all(struct xfs_mount *mp);
  59
  60int
  61xfs_extent_busy_ag_cmp(void *priv, struct list_head *a, struct list_head *b);
  62
  63static 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