cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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xfs_ag_resv.h (1500B)

      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__ */