root/fs/xfs/libxfs/xfs_ag_resv.h

INCLUDED FROM

DEFINITIONS

1. xfs_ag_resv_rmapbt_alloc
2. xfs_ag_resv_rmapbt_free

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2016 Oracle.  All Rights Reserved.
   4  * Author: Darrick J. Wong <darrick.wong@oracle.com>
   5  */
   6 #ifndef __XFS_AG_RESV_H__
   7 #define __XFS_AG_RESV_H__
   8 
   9 int xfs_ag_resv_free(struct xfs_perag *pag);
  10 int xfs_ag_resv_init(struct xfs_perag *pag, struct xfs_trans *tp);
  11 
  12 bool xfs_ag_resv_critical(struct xfs_perag *pag, enum xfs_ag_resv_type type);
  13 xfs_extlen_t xfs_ag_resv_needed(struct xfs_perag *pag,
  14                 enum xfs_ag_resv_type type);
  15 
  16 void xfs_ag_resv_alloc_extent(struct xfs_perag *pag, enum xfs_ag_resv_type type,
  17                 struct xfs_alloc_arg *args);
  18 void xfs_ag_resv_free_extent(struct xfs_perag *pag, enum xfs_ag_resv_type type,
  19                 struct xfs_trans *tp, xfs_extlen_t len);
  20 
  21 /*
  22  * RMAPBT reservation accounting wrappers. Since rmapbt blocks are sourced from
  23  * the AGFL, they are allocated one at a time and the reservation updates don't
  24  * require a transaction.
  25  */
  26 static inline void
  27 xfs_ag_resv_rmapbt_alloc(
  28         struct xfs_mount        *mp,
  29         xfs_agnumber_t          agno)
  30 {
  31         struct xfs_alloc_arg    args = { NULL };
  32         struct xfs_perag        *pag;
  33 
  34         args.len = 1;
  35         pag = xfs_perag_get(mp, agno);
  36         xfs_ag_resv_alloc_extent(pag, XFS_AG_RESV_RMAPBT, &args);
  37         xfs_perag_put(pag);
  38 }
  39 
  40 static inline void
  41 xfs_ag_resv_rmapbt_free(
  42         struct xfs_mount        *mp,
  43         xfs_agnumber_t          agno)
  44 {
  45         struct xfs_perag        *pag;
  46 
  47         pag = xfs_perag_get(mp, agno);
  48         xfs_ag_resv_free_extent(pag, XFS_AG_RESV_RMAPBT, NULL, 1);
  49         xfs_perag_put(pag);
  50 }
  51 
  52 #endif  /* __XFS_AG_RESV_H__ */