LXR linux/fs/xfs/libxfs/xfs_ag

   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
   9int xfs_ag_resv_free(struct xfs_perag *pag);
  10int xfs_ag_resv_init(struct xfs_perag *pag, struct xfs_trans *tp);
  11
  12bool xfs_ag_resv_critical(struct xfs_perag *pag, enum xfs_ag_resv_type type);
  13xfs_extlen_t xfs_ag_resv_needed(struct xfs_perag *pag,
  14                enum xfs_ag_resv_type type);
  15
  16void xfs_ag_resv_alloc_extent(struct xfs_perag *pag, enum xfs_ag_resv_type type,
  17                struct xfs_alloc_arg *args);
  18void 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
  21static inline struct xfs_ag_resv *
  22xfs_perag_resv(
  23        struct xfs_perag        *pag,
  24        enum xfs_ag_resv_type   type)
  25{
  26        switch (type) {
  27        case XFS_AG_RESV_METADATA:
  28                return &pag->pag_meta_resv;
  29        case XFS_AG_RESV_RMAPBT:
  30                return &pag->pag_rmapbt_resv;
  31        default:
  32                return NULL;
  33        }
  34}
  35
  36/*
  37 * RMAPBT reservation accounting wrappers. Since rmapbt blocks are sourced from
  38 * the AGFL, they are allocated one at a time and the reservation updates don't
  39 * require a transaction.
  40 */
  41static inline void
  42xfs_ag_resv_rmapbt_alloc(
  43        struct xfs_mount        *mp,
  44        xfs_agnumber_t          agno)
  45{
  46        struct xfs_alloc_arg    args = { NULL };
  47        struct xfs_perag        *pag;
  48
  49        args.len = 1;
  50        pag = xfs_perag_get(mp, agno);
  51        xfs_ag_resv_alloc_extent(pag, XFS_AG_RESV_RMAPBT, &args);
  52        xfs_perag_put(pag);
  53}
  54
  55#endif  /* __XFS_AG_RESV_H__ */
  56