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 static inline struct xfs_ag_resv * 22 xfs_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 */ 41 static inline void 42 xfs_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