projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 0b61f8a4 | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 035e00ac DW |
2 | /* |
| 3 | * Copyright (c) 2014 Red Hat, Inc. | |
| 4 | * All Rights Reserved. | |
| 035e00ac DW |
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 | ||
| 13 | /* rmaps only exist on crc enabled filesystems */ | |
| 14 | #define XFS_RMAP_BLOCK_LEN XFS_BTREE_SBLOCK_CRC_LEN | |
| 15 | ||
| 16 | /* | |
| 17 | * Record, key, and pointer address macros for btree blocks. | |
| 18 | * | |
| 19 | * (note that some of these may appear unused, but they are used in userspace) | |
| 20 | */ | |
| 21 | #define XFS_RMAP_REC_ADDR(block, index) \ | |
| 22 | ((struct xfs_rmap_rec *) \ | |
| 23 | ((char *)(block) + XFS_RMAP_BLOCK_LEN + \ | |
| 24 | (((index) - 1) * sizeof(struct xfs_rmap_rec)))) | |
| 25 | ||
| 26 | #define XFS_RMAP_KEY_ADDR(block, index) \ | |
| 27 | ((struct xfs_rmap_key *) \ | |
| 28 | ((char *)(block) + XFS_RMAP_BLOCK_LEN + \ | |
| cfed56ae DW |
29 | ((index) - 1) * 2 * sizeof(struct xfs_rmap_key))) |
| 30 | ||
| 31 | #define XFS_RMAP_HIGH_KEY_ADDR(block, index) \ | |
| 32 | ((struct xfs_rmap_key *) \ | |
| 33 | ((char *)(block) + XFS_RMAP_BLOCK_LEN + \ | |
| 34 | sizeof(struct xfs_rmap_key) + \ | |
| 35 | ((index) - 1) * 2 * sizeof(struct xfs_rmap_key))) | |
| 035e00ac DW |
36 | |
| 37 | #define XFS_RMAP_PTR_ADDR(block, index, maxrecs) \ | |
| 38 | ((xfs_rmap_ptr_t *) \ | |
| 39 | ((char *)(block) + XFS_RMAP_BLOCK_LEN + \ | |
| cfed56ae | 40 | (maxrecs) * 2 * sizeof(struct xfs_rmap_key) + \ |
| 035e00ac DW |
41 | ((index) - 1) * sizeof(xfs_rmap_ptr_t))) |
| 42 | ||
| 43 | struct xfs_btree_cur *xfs_rmapbt_init_cursor(struct xfs_mount *mp, | |
| 44 | struct xfs_trans *tp, struct xfs_buf *bp, | |
| 45 | xfs_agnumber_t agno); | |
| a1f69417 | 46 | int xfs_rmapbt_maxrecs(int blocklen, int leaf); |
| 035e00ac DW |
47 | extern void xfs_rmapbt_compute_maxlevels(struct xfs_mount *mp); |
| 48 | ||
| 84d69619 DW |
49 | extern xfs_extlen_t xfs_rmapbt_calc_size(struct xfs_mount *mp, |
| 50 | unsigned long long len); | |
| 20e73b00 DW |
51 | extern xfs_extlen_t xfs_rmapbt_max_size(struct xfs_mount *mp, |
| 52 | xfs_agblock_t agblocks); | |
| 84d69619 | 53 | |
| ebcbef3a | 54 | extern int xfs_rmapbt_calc_reserves(struct xfs_mount *mp, struct xfs_trans *tp, |
| 84d69619 DW |
55 | xfs_agnumber_t agno, xfs_extlen_t *ask, xfs_extlen_t *used); |
| 56 | ||
| 035e00ac | 57 | #endif /* __XFS_RMAP_BTREE_H__ */ |