1035e00acSDarrick J. Wong /* 2035e00acSDarrick J. Wong * Copyright (c) 2014 Red Hat, Inc. 3035e00acSDarrick J. Wong * All Rights Reserved. 4035e00acSDarrick J. Wong * 5035e00acSDarrick J. Wong * This program is free software; you can redistribute it and/or 6035e00acSDarrick J. Wong * modify it under the terms of the GNU General Public License as 7035e00acSDarrick J. Wong * published by the Free Software Foundation. 8035e00acSDarrick J. Wong * 9035e00acSDarrick J. Wong * This program is distributed in the hope that it would be useful, 10035e00acSDarrick J. Wong * but WITHOUT ANY WARRANTY; without even the implied warranty of 11035e00acSDarrick J. Wong * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12035e00acSDarrick J. Wong * GNU General Public License for more details. 13035e00acSDarrick J. Wong * 14035e00acSDarrick J. Wong * You should have received a copy of the GNU General Public License 15035e00acSDarrick J. Wong * along with this program; if not, write the Free Software Foundation, 16035e00acSDarrick J. Wong * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17035e00acSDarrick J. Wong */ 18035e00acSDarrick J. Wong #ifndef __XFS_RMAP_BTREE_H__ 19035e00acSDarrick J. Wong #define __XFS_RMAP_BTREE_H__ 20035e00acSDarrick J. Wong 21035e00acSDarrick J. Wong struct xfs_buf; 22035e00acSDarrick J. Wong struct xfs_btree_cur; 23035e00acSDarrick J. Wong struct xfs_mount; 24035e00acSDarrick J. Wong 25035e00acSDarrick J. Wong /* rmaps only exist on crc enabled filesystems */ 26035e00acSDarrick J. Wong #define XFS_RMAP_BLOCK_LEN XFS_BTREE_SBLOCK_CRC_LEN 27035e00acSDarrick J. Wong 28035e00acSDarrick J. Wong /* 29035e00acSDarrick J. Wong * Record, key, and pointer address macros for btree blocks. 30035e00acSDarrick J. Wong * 31035e00acSDarrick J. Wong * (note that some of these may appear unused, but they are used in userspace) 32035e00acSDarrick J. Wong */ 33035e00acSDarrick J. Wong #define XFS_RMAP_REC_ADDR(block, index) \ 34035e00acSDarrick J. Wong ((struct xfs_rmap_rec *) \ 35035e00acSDarrick J. Wong ((char *)(block) + XFS_RMAP_BLOCK_LEN + \ 36035e00acSDarrick J. Wong (((index) - 1) * sizeof(struct xfs_rmap_rec)))) 37035e00acSDarrick J. Wong 38035e00acSDarrick J. Wong #define XFS_RMAP_KEY_ADDR(block, index) \ 39035e00acSDarrick J. Wong ((struct xfs_rmap_key *) \ 40035e00acSDarrick J. Wong ((char *)(block) + XFS_RMAP_BLOCK_LEN + \ 41cfed56aeSDarrick J. Wong ((index) - 1) * 2 * sizeof(struct xfs_rmap_key))) 42cfed56aeSDarrick J. Wong 43cfed56aeSDarrick J. Wong #define XFS_RMAP_HIGH_KEY_ADDR(block, index) \ 44cfed56aeSDarrick J. Wong ((struct xfs_rmap_key *) \ 45cfed56aeSDarrick J. Wong ((char *)(block) + XFS_RMAP_BLOCK_LEN + \ 46cfed56aeSDarrick J. Wong sizeof(struct xfs_rmap_key) + \ 47cfed56aeSDarrick J. Wong ((index) - 1) * 2 * sizeof(struct xfs_rmap_key))) 48035e00acSDarrick J. Wong 49035e00acSDarrick J. Wong #define XFS_RMAP_PTR_ADDR(block, index, maxrecs) \ 50035e00acSDarrick J. Wong ((xfs_rmap_ptr_t *) \ 51035e00acSDarrick J. Wong ((char *)(block) + XFS_RMAP_BLOCK_LEN + \ 52cfed56aeSDarrick J. Wong (maxrecs) * 2 * sizeof(struct xfs_rmap_key) + \ 53035e00acSDarrick J. Wong ((index) - 1) * sizeof(xfs_rmap_ptr_t))) 54035e00acSDarrick J. Wong 55035e00acSDarrick J. Wong struct xfs_btree_cur *xfs_rmapbt_init_cursor(struct xfs_mount *mp, 56035e00acSDarrick J. Wong struct xfs_trans *tp, struct xfs_buf *bp, 57035e00acSDarrick J. Wong xfs_agnumber_t agno); 58035e00acSDarrick J. Wong int xfs_rmapbt_maxrecs(struct xfs_mount *mp, int blocklen, int leaf); 59035e00acSDarrick J. Wong extern void xfs_rmapbt_compute_maxlevels(struct xfs_mount *mp); 60035e00acSDarrick J. Wong 6184d69619SDarrick J. Wong extern xfs_extlen_t xfs_rmapbt_calc_size(struct xfs_mount *mp, 6284d69619SDarrick J. Wong unsigned long long len); 6384d69619SDarrick J. Wong extern xfs_extlen_t xfs_rmapbt_max_size(struct xfs_mount *mp); 6484d69619SDarrick J. Wong 6584d69619SDarrick J. Wong extern int xfs_rmapbt_calc_reserves(struct xfs_mount *mp, 6684d69619SDarrick J. Wong xfs_agnumber_t agno, xfs_extlen_t *ask, xfs_extlen_t *used); 6784d69619SDarrick J. Wong 68035e00acSDarrick J. Wong #endif /* __XFS_RMAP_BTREE_H__ */ 69