xfs/libxfs/xfs_ag_resv.h

0001 /* SPDX-License-Identifier: GPL-2.0+ */
0002 /*
0003  * Copyright (C) 2016 Oracle.  All Rights Reserved.
0004  * Author: Darrick J. Wong <darrick.wong@oracle.com>
0005  */
0006 #ifndef __XFS_AG_RESV_H__
0007 #define __XFS_AG_RESV_H__
0008
0009 int xfs_ag_resv_free(struct xfs_perag *pag);
0010 int xfs_ag_resv_init(struct xfs_perag *pag, struct xfs_trans *tp);
0011
0012 bool xfs_ag_resv_critical(struct xfs_perag *pag, enum xfs_ag_resv_type type);
0013 xfs_extlen_t xfs_ag_resv_needed(struct xfs_perag *pag,
0014         enum xfs_ag_resv_type type);
0015
0016 void xfs_ag_resv_alloc_extent(struct xfs_perag *pag, enum xfs_ag_resv_type type,
0017         struct xfs_alloc_arg *args);
0018 void xfs_ag_resv_free_extent(struct xfs_perag *pag, enum xfs_ag_resv_type type,
0019         struct xfs_trans *tp, xfs_extlen_t len);
0020
0021 static inline struct xfs_ag_resv *
0022 xfs_perag_resv(
0023     struct xfs_perag    *pag,
0024     enum xfs_ag_resv_type   type)
0025 {
0026     switch (type) {
0027     case XFS_AG_RESV_METADATA:
0028         return &pag->pag_meta_resv;
0029     case XFS_AG_RESV_RMAPBT:
0030         return &pag->pag_rmapbt_resv;
0031     default:
0032         return NULL;
0033     }
0034 }
0035
0036 /*
0037  * RMAPBT reservation accounting wrappers. Since rmapbt blocks are sourced from
0038  * the AGFL, they are allocated one at a time and the reservation updates don't
0039  * require a transaction.
0040  */
0041 static inline void
0042 xfs_ag_resv_rmapbt_alloc(
0043     struct xfs_mount    *mp,
0044     xfs_agnumber_t      agno)
0045 {
0046     struct xfs_alloc_arg    args = { NULL };
0047     struct xfs_perag    *pag;
0048
0049     args.len = 1;
0050     pag = xfs_perag_get(mp, agno);
0051     xfs_ag_resv_alloc_extent(pag, XFS_AG_RESV_RMAPBT, &args);
0052     xfs_perag_put(pag);
0053 }
0054
0055 #endif  /* __XFS_AG_RESV_H__ */