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_bmap_btree.h (3699B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * Copyright (c) 2000,2002-2005 Silicon Graphics, Inc.
      4 * All Rights Reserved.
      5 */
      6#ifndef __XFS_BMAP_BTREE_H__
      7#define __XFS_BMAP_BTREE_H__
      8
      9struct xfs_btree_cur;
     10struct xfs_btree_block;
     11struct xfs_mount;
     12struct xfs_inode;
     13struct xfs_trans;
     14
     15/*
     16 * Btree block header size depends on a superblock flag.
     17 */
     18#define XFS_BMBT_BLOCK_LEN(mp) \
     19	(xfs_has_crc(((mp))) ? \
     20		XFS_BTREE_LBLOCK_CRC_LEN : XFS_BTREE_LBLOCK_LEN)
     21
     22#define XFS_BMBT_REC_ADDR(mp, block, index) \
     23	((xfs_bmbt_rec_t *) \
     24		((char *)(block) + \
     25		 XFS_BMBT_BLOCK_LEN(mp) + \
     26		 ((index) - 1) * sizeof(xfs_bmbt_rec_t)))
     27
     28#define XFS_BMBT_KEY_ADDR(mp, block, index) \
     29	((xfs_bmbt_key_t *) \
     30		((char *)(block) + \
     31		 XFS_BMBT_BLOCK_LEN(mp) + \
     32		 ((index) - 1) * sizeof(xfs_bmbt_key_t)))
     33
     34#define XFS_BMBT_PTR_ADDR(mp, block, index, maxrecs) \
     35	((xfs_bmbt_ptr_t *) \
     36		((char *)(block) + \
     37		 XFS_BMBT_BLOCK_LEN(mp) + \
     38		 (maxrecs) * sizeof(xfs_bmbt_key_t) + \
     39		 ((index) - 1) * sizeof(xfs_bmbt_ptr_t)))
     40
     41#define XFS_BMDR_REC_ADDR(block, index) \
     42	((xfs_bmdr_rec_t *) \
     43		((char *)(block) + \
     44		 sizeof(struct xfs_bmdr_block) + \
     45	         ((index) - 1) * sizeof(xfs_bmdr_rec_t)))
     46
     47#define XFS_BMDR_KEY_ADDR(block, index) \
     48	((xfs_bmdr_key_t *) \
     49		((char *)(block) + \
     50		 sizeof(struct xfs_bmdr_block) + \
     51		 ((index) - 1) * sizeof(xfs_bmdr_key_t)))
     52
     53#define XFS_BMDR_PTR_ADDR(block, index, maxrecs) \
     54	((xfs_bmdr_ptr_t *) \
     55		((char *)(block) + \
     56		 sizeof(struct xfs_bmdr_block) + \
     57		 (maxrecs) * sizeof(xfs_bmdr_key_t) + \
     58		 ((index) - 1) * sizeof(xfs_bmdr_ptr_t)))
     59
     60/*
     61 * These are to be used when we know the size of the block and
     62 * we don't have a cursor.
     63 */
     64#define XFS_BMAP_BROOT_PTR_ADDR(mp, bb, i, sz) \
     65	XFS_BMBT_PTR_ADDR(mp, bb, i, xfs_bmbt_maxrecs(mp, sz, 0))
     66
     67#define XFS_BMAP_BROOT_SPACE_CALC(mp, nrecs) \
     68	(int)(XFS_BMBT_BLOCK_LEN(mp) + \
     69	       ((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t))))
     70
     71#define XFS_BMAP_BROOT_SPACE(mp, bb) \
     72	(XFS_BMAP_BROOT_SPACE_CALC(mp, be16_to_cpu((bb)->bb_numrecs)))
     73#define XFS_BMDR_SPACE_CALC(nrecs) \
     74	(int)(sizeof(xfs_bmdr_block_t) + \
     75	       ((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t))))
     76#define XFS_BMAP_BMDR_SPACE(bb) \
     77	(XFS_BMDR_SPACE_CALC(be16_to_cpu((bb)->bb_numrecs)))
     78
     79/*
     80 * Maximum number of bmap btree levels.
     81 */
     82#define XFS_BM_MAXLEVELS(mp,w)		((mp)->m_bm_maxlevels[(w)])
     83
     84/*
     85 * Prototypes for xfs_bmap.c to call.
     86 */
     87extern void xfs_bmdr_to_bmbt(struct xfs_inode *, xfs_bmdr_block_t *, int,
     88			struct xfs_btree_block *, int);
     89
     90void xfs_bmbt_disk_set_all(struct xfs_bmbt_rec *r, struct xfs_bmbt_irec *s);
     91extern xfs_filblks_t xfs_bmbt_disk_get_blockcount(const struct xfs_bmbt_rec *r);
     92extern xfs_fileoff_t xfs_bmbt_disk_get_startoff(const struct xfs_bmbt_rec *r);
     93void xfs_bmbt_disk_get_all(const struct xfs_bmbt_rec *r,
     94		struct xfs_bmbt_irec *s);
     95
     96extern void xfs_bmbt_to_bmdr(struct xfs_mount *, struct xfs_btree_block *, int,
     97			xfs_bmdr_block_t *, int);
     98
     99extern int xfs_bmbt_get_maxrecs(struct xfs_btree_cur *, int level);
    100extern int xfs_bmdr_maxrecs(int blocklen, int leaf);
    101extern int xfs_bmbt_maxrecs(struct xfs_mount *, int blocklen, int leaf);
    102
    103extern int xfs_bmbt_change_owner(struct xfs_trans *tp, struct xfs_inode *ip,
    104				 int whichfork, xfs_ino_t new_owner,
    105				 struct list_head *buffer_list);
    106
    107extern struct xfs_btree_cur *xfs_bmbt_init_cursor(struct xfs_mount *,
    108		struct xfs_trans *, struct xfs_inode *, int);
    109
    110extern unsigned long long xfs_bmbt_calc_size(struct xfs_mount *mp,
    111		unsigned long long len);
    112
    113unsigned int xfs_bmbt_maxlevels_ondisk(void);
    114
    115int __init xfs_bmbt_init_cur_cache(void);
    116void xfs_bmbt_destroy_cur_cache(void);
    117
    118#endif	/* __XFS_BMAP_BTREE_H__ */