1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0+ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Copyright (C) 2016 Oracle. All Rights Reserved. 4*4882a593Smuzhiyun * Author: Darrick J. Wong <darrick.wong@oracle.com> 5*4882a593Smuzhiyun */ 6*4882a593Smuzhiyun #ifndef __XFS_REFCOUNT_BTREE_H__ 7*4882a593Smuzhiyun #define __XFS_REFCOUNT_BTREE_H__ 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun /* 10*4882a593Smuzhiyun * Reference Count Btree on-disk structures 11*4882a593Smuzhiyun */ 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun struct xfs_buf; 14*4882a593Smuzhiyun struct xfs_btree_cur; 15*4882a593Smuzhiyun struct xfs_mount; 16*4882a593Smuzhiyun struct xbtree_afakeroot; 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun /* 19*4882a593Smuzhiyun * Btree block header size 20*4882a593Smuzhiyun */ 21*4882a593Smuzhiyun #define XFS_REFCOUNT_BLOCK_LEN XFS_BTREE_SBLOCK_CRC_LEN 22*4882a593Smuzhiyun 23*4882a593Smuzhiyun /* 24*4882a593Smuzhiyun * Record, key, and pointer address macros for btree blocks. 25*4882a593Smuzhiyun * 26*4882a593Smuzhiyun * (note that some of these may appear unused, but they are used in userspace) 27*4882a593Smuzhiyun */ 28*4882a593Smuzhiyun #define XFS_REFCOUNT_REC_ADDR(block, index) \ 29*4882a593Smuzhiyun ((struct xfs_refcount_rec *) \ 30*4882a593Smuzhiyun ((char *)(block) + \ 31*4882a593Smuzhiyun XFS_REFCOUNT_BLOCK_LEN + \ 32*4882a593Smuzhiyun (((index) - 1) * sizeof(struct xfs_refcount_rec)))) 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun #define XFS_REFCOUNT_KEY_ADDR(block, index) \ 35*4882a593Smuzhiyun ((struct xfs_refcount_key *) \ 36*4882a593Smuzhiyun ((char *)(block) + \ 37*4882a593Smuzhiyun XFS_REFCOUNT_BLOCK_LEN + \ 38*4882a593Smuzhiyun ((index) - 1) * sizeof(struct xfs_refcount_key))) 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun #define XFS_REFCOUNT_PTR_ADDR(block, index, maxrecs) \ 41*4882a593Smuzhiyun ((xfs_refcount_ptr_t *) \ 42*4882a593Smuzhiyun ((char *)(block) + \ 43*4882a593Smuzhiyun XFS_REFCOUNT_BLOCK_LEN + \ 44*4882a593Smuzhiyun (maxrecs) * sizeof(struct xfs_refcount_key) + \ 45*4882a593Smuzhiyun ((index) - 1) * sizeof(xfs_refcount_ptr_t))) 46*4882a593Smuzhiyun 47*4882a593Smuzhiyun extern struct xfs_btree_cur *xfs_refcountbt_init_cursor(struct xfs_mount *mp, 48*4882a593Smuzhiyun struct xfs_trans *tp, struct xfs_buf *agbp, 49*4882a593Smuzhiyun xfs_agnumber_t agno); 50*4882a593Smuzhiyun struct xfs_btree_cur *xfs_refcountbt_stage_cursor(struct xfs_mount *mp, 51*4882a593Smuzhiyun struct xbtree_afakeroot *afake, xfs_agnumber_t agno); 52*4882a593Smuzhiyun extern int xfs_refcountbt_maxrecs(int blocklen, bool leaf); 53*4882a593Smuzhiyun extern void xfs_refcountbt_compute_maxlevels(struct xfs_mount *mp); 54*4882a593Smuzhiyun 55*4882a593Smuzhiyun extern xfs_extlen_t xfs_refcountbt_calc_size(struct xfs_mount *mp, 56*4882a593Smuzhiyun unsigned long long len); 57*4882a593Smuzhiyun extern xfs_extlen_t xfs_refcountbt_max_size(struct xfs_mount *mp, 58*4882a593Smuzhiyun xfs_agblock_t agblocks); 59*4882a593Smuzhiyun 60*4882a593Smuzhiyun extern int xfs_refcountbt_calc_reserves(struct xfs_mount *mp, 61*4882a593Smuzhiyun struct xfs_trans *tp, xfs_agnumber_t agno, xfs_extlen_t *ask, 62*4882a593Smuzhiyun xfs_extlen_t *used); 63*4882a593Smuzhiyun 64*4882a593Smuzhiyun void xfs_refcountbt_commit_staged_btree(struct xfs_btree_cur *cur, 65*4882a593Smuzhiyun struct xfs_trans *tp, struct xfs_buf *agbp); 66*4882a593Smuzhiyun 67*4882a593Smuzhiyun #endif /* __XFS_REFCOUNT_BTREE_H__ */ 68