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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; | |
59d67712 | 12 | struct xbtree_afakeroot; |
035e00ac DW |
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 + \ | |
cfed56ae DW |
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))) | |
035e00ac DW |
37 | |
38 | #define XFS_RMAP_PTR_ADDR(block, index, maxrecs) \ | |
39 | ((xfs_rmap_ptr_t *) \ | |
40 | ((char *)(block) + XFS_RMAP_BLOCK_LEN + \ | |
cfed56ae | 41 | (maxrecs) * 2 * sizeof(struct xfs_rmap_key) + \ |
035e00ac DW |
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, | |
fa9c3c19 | 46 | struct xfs_perag *pag); |
59d67712 | 47 | struct xfs_btree_cur *xfs_rmapbt_stage_cursor(struct xfs_mount *mp, |
fa9c3c19 | 48 | struct xbtree_afakeroot *afake, struct xfs_perag *pag); |
59d67712 DW |
49 | void xfs_rmapbt_commit_staged_btree(struct xfs_btree_cur *cur, |
50 | struct xfs_trans *tp, struct xfs_buf *agbp); | |
a1f69417 | 51 | int xfs_rmapbt_maxrecs(int blocklen, int leaf); |
035e00ac DW |
52 | extern void xfs_rmapbt_compute_maxlevels(struct xfs_mount *mp); |
53 | ||
84d69619 DW |
54 | extern xfs_extlen_t xfs_rmapbt_calc_size(struct xfs_mount *mp, |
55 | unsigned long long len); | |
20e73b00 DW |
56 | extern xfs_extlen_t xfs_rmapbt_max_size(struct xfs_mount *mp, |
57 | xfs_agblock_t agblocks); | |
84d69619 | 58 | |
ebcbef3a | 59 | extern int xfs_rmapbt_calc_reserves(struct xfs_mount *mp, struct xfs_trans *tp, |
30933120 | 60 | struct xfs_perag *pag, xfs_extlen_t *ask, xfs_extlen_t *used); |
84d69619 | 61 | |
b7df7630 | 62 | #endif /* __XFS_RMAP_BTREE_H__ */ |