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 *
xfs_perag_resv(struct xfs_perag * pag,enum xfs_ag_resv_type type)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
xfs_ag_resv_rmapbt_alloc(struct xfs_mount * mp,xfs_agnumber_t agno)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