| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | /* |
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| 3 | * Copyright (c) 2000,2005 Silicon Graphics, Inc. |
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| 4 | * All Rights Reserved. |
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| 5 | */ |
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| 6 | #ifndef __XFS_ALLOC_BTREE_H__ |
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| 7 | #define __XFS_ALLOC_BTREE_H__ |
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| 8 | |
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| 9 | /* |
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| 10 | * Freespace 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 depends on a superblock flag. |
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| 21 | */ |
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| 22 | #define XFS_ALLOC_BLOCK_LEN(mp) \ |
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| 23 | (xfs_has_crc(((mp))) ? \ |
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| 24 | XFS_BTREE_SBLOCK_CRC_LEN : XFS_BTREE_SBLOCK_LEN) |
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| 25 | |
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| 26 | /* |
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| 27 | * Record, key, and pointer address macros for btree blocks. |
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| 28 | * |
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| 29 | * (note that some of these may appear unused, but they are used in userspace) |
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| 30 | */ |
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| 31 | #define XFS_ALLOC_REC_ADDR(mp, block, index) \ |
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| 32 | ((xfs_alloc_rec_t *) \ |
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| 33 | ((char *)(block) + \ |
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| 34 | XFS_ALLOC_BLOCK_LEN(mp) + \ |
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| 35 | (((index) - 1) * sizeof(xfs_alloc_rec_t)))) |
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| 36 | |
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| 37 | #define XFS_ALLOC_KEY_ADDR(mp, block, index) \ |
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| 38 | ((xfs_alloc_key_t *) \ |
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| 39 | ((char *)(block) + \ |
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| 40 | XFS_ALLOC_BLOCK_LEN(mp) + \ |
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| 41 | ((index) - 1) * sizeof(xfs_alloc_key_t))) |
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| 42 | |
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| 43 | #define XFS_ALLOC_PTR_ADDR(mp, block, index, maxrecs) \ |
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| 44 | ((xfs_alloc_ptr_t *) \ |
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| 45 | ((char *)(block) + \ |
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| 46 | XFS_ALLOC_BLOCK_LEN(mp) + \ |
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| 47 | (maxrecs) * sizeof(xfs_alloc_key_t) + \ |
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| 48 | ((index) - 1) * sizeof(xfs_alloc_ptr_t))) |
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| 49 | |
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| 50 | struct xfs_btree_cur *xfs_bnobt_init_cursor(struct xfs_mount *mp, |
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| 51 | struct xfs_trans *tp, struct xfs_buf *bp, |
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| 52 | struct xfs_perag *pag); |
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| 53 | struct xfs_btree_cur *xfs_cntbt_init_cursor(struct xfs_mount *mp, |
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| 54 | struct xfs_trans *tp, struct xfs_buf *bp, |
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| 55 | struct xfs_perag *pag); |
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| 56 | extern int xfs_allocbt_maxrecs(struct xfs_mount *, int, int); |
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| 57 | extern xfs_extlen_t xfs_allocbt_calc_size(struct xfs_mount *mp, |
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| 58 | unsigned long long len); |
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| 59 | |
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| 60 | void xfs_allocbt_commit_staged_btree(struct xfs_btree_cur *cur, |
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| 61 | struct xfs_trans *tp, struct xfs_buf *agbp); |
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| 62 | |
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| 63 | unsigned int xfs_allocbt_maxlevels_ondisk(void); |
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| 64 | |
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| 65 | int __init xfs_allocbt_init_cur_cache(void); |
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| 66 | void xfs_allocbt_destroy_cur_cache(void); |
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| 67 | |
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| 68 | #endif /* __XFS_ALLOC_BTREE_H__ */ |
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| 69 | |
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