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_perag;
  13struct xfs_trans;
  14struct 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 */
  23struct 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
  34void
  35xfs_extent_busy_insert(struct xfs_trans *tp, struct xfs_perag *pag,
  36        xfs_agblock_t bno, xfs_extlen_t len, unsigned int flags);
  37
  38void
  39xfs_extent_busy_clear(struct xfs_mount *mp, struct list_head *list,
  40        bool do_discard);
  41
  42int
  43xfs_extent_busy_search(struct xfs_mount *mp, struct xfs_perag *pag,
  44        xfs_agblock_t bno, xfs_extlen_t len);
  45
  46void
  47xfs_extent_busy_reuse(struct xfs_mount *mp, struct xfs_perag *pag,
  48        xfs_agblock_t fbno, xfs_extlen_t flen, bool userdata);
  49
  50bool
  51xfs_extent_busy_trim(struct xfs_alloc_arg *args, xfs_agblock_t *bno,
  52                xfs_extlen_t *len, unsigned *busy_gen);
  53
  54void
  55xfs_extent_busy_flush(struct xfs_mount *mp, struct xfs_perag *pag,
  56        unsigned busy_gen);
  57
  58void
  59xfs_extent_busy_wait_all(struct xfs_mount *mp);
  60
  61int
  62xfs_extent_busy_ag_cmp(void *priv, const struct list_head *a,
  63        const struct list_head *b);
  64
  65static 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