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 9 struct xfs_buf; 10 struct xfs_btree_cur; 11 struct xfs_mount; 12 struct 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 44 struct 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); 47 struct xfs_btree_cur *xfs_rmapbt_stage_cursor(struct xfs_mount *mp, 48 struct xbtree_afakeroot *afake, struct xfs_perag *pag); 49 void xfs_rmapbt_commit_staged_btree(struct xfs_btree_cur *cur, 50 struct xfs_trans *tp, struct xfs_buf *agbp); 51 int xfs_rmapbt_maxrecs(int blocklen, int leaf); 52 extern void xfs_rmapbt_compute_maxlevels(struct xfs_mount *mp); 53 54 extern xfs_extlen_t xfs_rmapbt_calc_size(struct xfs_mount *mp, 55 unsigned long long len); 56 extern xfs_extlen_t xfs_rmapbt_max_size(struct xfs_mount *mp, 57 xfs_agblock_t agblocks); 58 59 extern 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 62 #endif /* __XFS_RMAP_BTREE_H__ */ 63