| 1 | // SPDX-License-Identifier: GPL-2.0+ |
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| 2 | /* |
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| 3 | * Copyright (C) 2016 Oracle. All Rights Reserved. |
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| 4 | * Author: Darrick J. Wong <darrick.wong@oracle.com> |
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| 5 | */ |
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| 6 | #ifndef __XFS_REFCOUNT_BTREE_H__ |
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| 7 | #define __XFS_REFCOUNT_BTREE_H__ |
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| 8 | |
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| 9 | /* |
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| 10 | * Reference Count Btree on-disk structures |
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| 11 | */ |
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| 12 | |
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| 13 | struct xfs_buf; |
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| 14 | struct xfs_btree_cur; |
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| 15 | struct xfs_mount; |
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| 16 | struct xfs_perag; |
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| 17 | struct xbtree_afakeroot; |
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| 18 | |
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| 19 | /* |
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| 20 | * Btree block header size |
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| 21 | */ |
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| 22 | #define XFS_REFCOUNT_BLOCK_LEN XFS_BTREE_SBLOCK_CRC_LEN |
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| 23 | |
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| 24 | /* |
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| 25 | * Record, key, and pointer address macros for btree blocks. |
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| 26 | * |
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| 27 | * (note that some of these may appear unused, but they are used in userspace) |
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| 28 | */ |
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| 29 | #define XFS_REFCOUNT_REC_ADDR(block, index) \ |
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| 30 | ((struct xfs_refcount_rec *) \ |
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| 31 | ((char *)(block) + \ |
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| 32 | XFS_REFCOUNT_BLOCK_LEN + \ |
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| 33 | (((index) - 1) * sizeof(struct xfs_refcount_rec)))) |
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| 34 | |
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| 35 | #define XFS_REFCOUNT_KEY_ADDR(block, index) \ |
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| 36 | ((struct xfs_refcount_key *) \ |
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| 37 | ((char *)(block) + \ |
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| 38 | XFS_REFCOUNT_BLOCK_LEN + \ |
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| 39 | ((index) - 1) * sizeof(struct xfs_refcount_key))) |
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| 40 | |
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| 41 | #define XFS_REFCOUNT_PTR_ADDR(block, index, maxrecs) \ |
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| 42 | ((xfs_refcount_ptr_t *) \ |
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| 43 | ((char *)(block) + \ |
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| 44 | XFS_REFCOUNT_BLOCK_LEN + \ |
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| 45 | (maxrecs) * sizeof(struct xfs_refcount_key) + \ |
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| 46 | ((index) - 1) * sizeof(xfs_refcount_ptr_t))) |
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| 47 | |
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| 48 | extern struct xfs_btree_cur *xfs_refcountbt_init_cursor(struct xfs_mount *mp, |
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| 49 | struct xfs_trans *tp, struct xfs_buf *agbp, |
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| 50 | struct xfs_perag *pag); |
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| 51 | extern int xfs_refcountbt_maxrecs(int blocklen, bool leaf); |
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| 52 | extern void xfs_refcountbt_compute_maxlevels(struct xfs_mount *mp); |
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| 53 | |
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| 54 | extern xfs_extlen_t xfs_refcountbt_calc_size(struct xfs_mount *mp, |
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| 55 | unsigned long long len); |
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| 56 | extern xfs_extlen_t xfs_refcountbt_max_size(struct xfs_mount *mp, |
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| 57 | xfs_agblock_t agblocks); |
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| 58 | |
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| 59 | extern int xfs_refcountbt_calc_reserves(struct xfs_mount *mp, |
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| 60 | struct xfs_trans *tp, struct xfs_perag *pag, xfs_extlen_t *ask, |
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| 61 | xfs_extlen_t *used); |
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| 62 | |
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| 63 | void xfs_refcountbt_commit_staged_btree(struct xfs_btree_cur *cur, |
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| 64 | struct xfs_trans *tp, struct xfs_buf *agbp); |
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| 65 | |
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| 66 | unsigned int xfs_refcountbt_maxlevels_ondisk(void); |
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| 67 | |
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| 68 | int __init xfs_refcountbt_init_cur_cache(void); |
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| 69 | void xfs_refcountbt_destroy_cur_cache(void); |
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| 70 | |
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| 71 | #endif /* __XFS_REFCOUNT_BTREE_H__ */ |
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| 72 | |
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