fs/xfs/xfs_extent_busy.h

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