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_rmap_btree.h (2238B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * Copyright (c) 2014 Red Hat, Inc.
      4 * All Rights Reserved.
      5 */
      6#ifndef __XFS_RMAP_BTREE_H__
      7#define __XFS_RMAP_BTREE_H__
      8
      9struct xfs_buf;
     10struct xfs_btree_cur;
     11struct xfs_mount;
     12struct xbtree_afakeroot;
     13
     14/* rmaps only exist on crc enabled filesystems */
     15#define XFS_RMAP_BLOCK_LEN	XFS_BTREE_SBLOCK_CRC_LEN
     16
     17/*
     18 * Record, key, and pointer address macros for btree blocks.
     19 *
     20 * (note that some of these may appear unused, but they are used in userspace)
     21 */
     22#define XFS_RMAP_REC_ADDR(block, index) \
     23	((struct xfs_rmap_rec *) \
     24		((char *)(block) + XFS_RMAP_BLOCK_LEN + \
     25		 (((index) - 1) * sizeof(struct xfs_rmap_rec))))
     26
     27#define XFS_RMAP_KEY_ADDR(block, index) \
     28	((struct xfs_rmap_key *) \
     29		((char *)(block) + XFS_RMAP_BLOCK_LEN + \
     30		 ((index) - 1) * 2 * sizeof(struct xfs_rmap_key)))
     31
     32#define XFS_RMAP_HIGH_KEY_ADDR(block, index) \
     33	((struct xfs_rmap_key *) \
     34		((char *)(block) + XFS_RMAP_BLOCK_LEN + \
     35		 sizeof(struct xfs_rmap_key) + \
     36		 ((index) - 1) * 2 * sizeof(struct xfs_rmap_key)))
     37
     38#define XFS_RMAP_PTR_ADDR(block, index, maxrecs) \
     39	((xfs_rmap_ptr_t *) \
     40		((char *)(block) + XFS_RMAP_BLOCK_LEN + \
     41		 (maxrecs) * 2 * sizeof(struct xfs_rmap_key) + \
     42		 ((index) - 1) * sizeof(xfs_rmap_ptr_t)))
     43
     44struct xfs_btree_cur *xfs_rmapbt_init_cursor(struct xfs_mount *mp,
     45				struct xfs_trans *tp, struct xfs_buf *bp,
     46				struct xfs_perag *pag);
     47struct xfs_btree_cur *xfs_rmapbt_stage_cursor(struct xfs_mount *mp,
     48		struct xbtree_afakeroot *afake, struct xfs_perag *pag);
     49void xfs_rmapbt_commit_staged_btree(struct xfs_btree_cur *cur,
     50		struct xfs_trans *tp, struct xfs_buf *agbp);
     51int xfs_rmapbt_maxrecs(int blocklen, int leaf);
     52extern void xfs_rmapbt_compute_maxlevels(struct xfs_mount *mp);
     53
     54extern xfs_extlen_t xfs_rmapbt_calc_size(struct xfs_mount *mp,
     55		unsigned long long len);
     56extern xfs_extlen_t xfs_rmapbt_max_size(struct xfs_mount *mp,
     57		xfs_agblock_t agblocks);
     58
     59extern int xfs_rmapbt_calc_reserves(struct xfs_mount *mp, struct xfs_trans *tp,
     60		struct xfs_perag *pag, xfs_extlen_t *ask, xfs_extlen_t *used);
     61
     62unsigned int xfs_rmapbt_maxlevels_ondisk(void);
     63
     64int __init xfs_rmapbt_init_cur_cache(void);
     65void xfs_rmapbt_destroy_cur_cache(void);
     66
     67#endif /* __XFS_RMAP_BTREE_H__ */