1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Copyright (c) 2014 Red Hat, Inc. 4*4882a593Smuzhiyun * All Rights Reserved. 5*4882a593Smuzhiyun */ 6*4882a593Smuzhiyun #ifndef __XFS_RMAP_BTREE_H__ 7*4882a593Smuzhiyun #define __XFS_RMAP_BTREE_H__ 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun struct xfs_buf; 10*4882a593Smuzhiyun struct xfs_btree_cur; 11*4882a593Smuzhiyun struct xfs_mount; 12*4882a593Smuzhiyun struct xbtree_afakeroot; 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun /* rmaps only exist on crc enabled filesystems */ 15*4882a593Smuzhiyun #define XFS_RMAP_BLOCK_LEN XFS_BTREE_SBLOCK_CRC_LEN 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun /* 18*4882a593Smuzhiyun * Record, key, and pointer address macros for btree blocks. 19*4882a593Smuzhiyun * 20*4882a593Smuzhiyun * (note that some of these may appear unused, but they are used in userspace) 21*4882a593Smuzhiyun */ 22*4882a593Smuzhiyun #define XFS_RMAP_REC_ADDR(block, index) \ 23*4882a593Smuzhiyun ((struct xfs_rmap_rec *) \ 24*4882a593Smuzhiyun ((char *)(block) + XFS_RMAP_BLOCK_LEN + \ 25*4882a593Smuzhiyun (((index) - 1) * sizeof(struct xfs_rmap_rec)))) 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun #define XFS_RMAP_KEY_ADDR(block, index) \ 28*4882a593Smuzhiyun ((struct xfs_rmap_key *) \ 29*4882a593Smuzhiyun ((char *)(block) + XFS_RMAP_BLOCK_LEN + \ 30*4882a593Smuzhiyun ((index) - 1) * 2 * sizeof(struct xfs_rmap_key))) 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun #define XFS_RMAP_HIGH_KEY_ADDR(block, index) \ 33*4882a593Smuzhiyun ((struct xfs_rmap_key *) \ 34*4882a593Smuzhiyun ((char *)(block) + XFS_RMAP_BLOCK_LEN + \ 35*4882a593Smuzhiyun sizeof(struct xfs_rmap_key) + \ 36*4882a593Smuzhiyun ((index) - 1) * 2 * sizeof(struct xfs_rmap_key))) 37*4882a593Smuzhiyun 38*4882a593Smuzhiyun #define XFS_RMAP_PTR_ADDR(block, index, maxrecs) \ 39*4882a593Smuzhiyun ((xfs_rmap_ptr_t *) \ 40*4882a593Smuzhiyun ((char *)(block) + XFS_RMAP_BLOCK_LEN + \ 41*4882a593Smuzhiyun (maxrecs) * 2 * sizeof(struct xfs_rmap_key) + \ 42*4882a593Smuzhiyun ((index) - 1) * sizeof(xfs_rmap_ptr_t))) 43*4882a593Smuzhiyun 44*4882a593Smuzhiyun struct xfs_btree_cur *xfs_rmapbt_init_cursor(struct xfs_mount *mp, 45*4882a593Smuzhiyun struct xfs_trans *tp, struct xfs_buf *bp, 46*4882a593Smuzhiyun xfs_agnumber_t agno); 47*4882a593Smuzhiyun struct xfs_btree_cur *xfs_rmapbt_stage_cursor(struct xfs_mount *mp, 48*4882a593Smuzhiyun struct xbtree_afakeroot *afake, xfs_agnumber_t agno); 49*4882a593Smuzhiyun void xfs_rmapbt_commit_staged_btree(struct xfs_btree_cur *cur, 50*4882a593Smuzhiyun struct xfs_trans *tp, struct xfs_buf *agbp); 51*4882a593Smuzhiyun int xfs_rmapbt_maxrecs(int blocklen, int leaf); 52*4882a593Smuzhiyun extern void xfs_rmapbt_compute_maxlevels(struct xfs_mount *mp); 53*4882a593Smuzhiyun 54*4882a593Smuzhiyun extern xfs_extlen_t xfs_rmapbt_calc_size(struct xfs_mount *mp, 55*4882a593Smuzhiyun unsigned long long len); 56*4882a593Smuzhiyun extern xfs_extlen_t xfs_rmapbt_max_size(struct xfs_mount *mp, 57*4882a593Smuzhiyun xfs_agblock_t agblocks); 58*4882a593Smuzhiyun 59*4882a593Smuzhiyun extern int xfs_rmapbt_calc_reserves(struct xfs_mount *mp, struct xfs_trans *tp, 60*4882a593Smuzhiyun xfs_agnumber_t agno, xfs_extlen_t *ask, xfs_extlen_t *used); 61*4882a593Smuzhiyun 62*4882a593Smuzhiyun #endif /* __XFS_RMAP_BTREE_H__ */ 63