libxfs/xfs_ag_resv.h

   1 /*
   2  * Copyright (C) 2016 Oracle.  All Rights Reserved.
   3  *
   4  * Author: Darrick J. Wong <darrick.wong@oracle.com>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it would be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write the Free Software Foundation,
  18  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA.
  19  */
  20 #ifndef __XFS_AG_RESV_H__
  21 #define __XFS_AG_RESV_H__
  22
  23 int xfs_ag_resv_free(struct xfs_perag *pag);
  24 int xfs_ag_resv_init(struct xfs_perag *pag);
  25
  26 bool xfs_ag_resv_critical(struct xfs_perag *pag, enum xfs_ag_resv_type type);
  27 xfs_extlen_t xfs_ag_resv_needed(struct xfs_perag *pag,
  28                 enum xfs_ag_resv_type type);
  29
  30 void xfs_ag_resv_alloc_extent(struct xfs_perag *pag, enum xfs_ag_resv_type type,
  31                 struct xfs_alloc_arg *args);
  32 void xfs_ag_resv_free_extent(struct xfs_perag *pag, enum xfs_ag_resv_type type,
  33                 struct xfs_trans *tp, xfs_extlen_t len);
  34
  35 /*
  36  * RMAPBT reservation accounting wrappers. Since rmapbt blocks are sourced from
  37  * the AGFL, they are allocated one at a time and the reservation updates don't
  38  * require a transaction.
  39  */
  40 static inline void
  41 xfs_ag_resv_rmapbt_alloc(
  42         struct xfs_mount        *mp,
  43         xfs_agnumber_t          agno)
  44 {
  45         struct xfs_alloc_arg    args = {0};
  46         struct xfs_perag        *pag;
  47
  48         args.len = 1;
  49         pag = xfs_perag_get(mp, agno);
  50         xfs_ag_resv_alloc_extent(pag, XFS_AG_RESV_RMAPBT, &args);
  51         xfs_perag_put(pag);
  52 }
  53
  54 static inline void
  55 xfs_ag_resv_rmapbt_free(
  56         struct xfs_mount        *mp,
  57         xfs_agnumber_t          agno)
  58 {
  59         struct xfs_perag        *pag;
  60
  61         pag = xfs_perag_get(mp, agno);
  62         xfs_ag_resv_free_extent(pag, XFS_AG_RESV_RMAPBT, NULL, 1);
  63         xfs_perag_put(pag);
  64 }
  65
  66 #endif  /* __XFS_AG_RESV_H__ */