| 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_IALLOC_BTREE_H__ |
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| 7 | #define __XFS_IALLOC_BTREE_H__ |
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| 8 | |
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| 9 | /* |
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| 10 | * Inode map 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 | |
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| 18 | /* |
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| 19 | * Btree block header size depends on a superblock flag. |
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| 20 | */ |
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| 21 | #define XFS_INOBT_BLOCK_LEN(mp) \ |
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| 22 | (xfs_has_crc(((mp))) ? \ |
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| 23 | XFS_BTREE_SBLOCK_CRC_LEN : XFS_BTREE_SBLOCK_LEN) |
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| 24 | |
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| 25 | /* |
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| 26 | * Record, key, and pointer address macros for btree blocks. |
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| 27 | * |
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| 28 | * (note that some of these may appear unused, but they are used in userspace) |
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| 29 | */ |
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| 30 | #define XFS_INOBT_REC_ADDR(mp, block, index) \ |
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| 31 | ((xfs_inobt_rec_t *) \ |
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| 32 | ((char *)(block) + \ |
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| 33 | XFS_INOBT_BLOCK_LEN(mp) + \ |
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| 34 | (((index) - 1) * sizeof(xfs_inobt_rec_t)))) |
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| 35 | |
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| 36 | #define XFS_INOBT_KEY_ADDR(mp, block, index) \ |
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| 37 | ((xfs_inobt_key_t *) \ |
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| 38 | ((char *)(block) + \ |
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| 39 | XFS_INOBT_BLOCK_LEN(mp) + \ |
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| 40 | ((index) - 1) * sizeof(xfs_inobt_key_t))) |
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| 41 | |
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| 42 | #define XFS_INOBT_PTR_ADDR(mp, block, index, maxrecs) \ |
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| 43 | ((xfs_inobt_ptr_t *) \ |
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| 44 | ((char *)(block) + \ |
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| 45 | XFS_INOBT_BLOCK_LEN(mp) + \ |
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| 46 | (maxrecs) * sizeof(xfs_inobt_key_t) + \ |
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| 47 | ((index) - 1) * sizeof(xfs_inobt_ptr_t))) |
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| 48 | |
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| 49 | struct xfs_btree_cur *xfs_inobt_init_cursor(struct xfs_perag *pag, |
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| 50 | struct xfs_trans *tp, struct xfs_buf *agbp); |
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| 51 | struct xfs_btree_cur *xfs_finobt_init_cursor(struct xfs_perag *pag, |
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| 52 | struct xfs_trans *tp, struct xfs_buf *agbp); |
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| 53 | unsigned int xfs_inobt_maxrecs(struct xfs_mount *mp, unsigned int blocklen, |
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| 54 | bool leaf); |
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| 55 | |
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| 56 | /* ir_holemask to inode allocation bitmap conversion */ |
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| 57 | uint64_t xfs_inobt_irec_to_allocmask(const struct xfs_inobt_rec_incore *irec); |
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| 58 | |
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| 59 | #if defined(DEBUG) || defined(XFS_WARN) |
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| 60 | int xfs_inobt_rec_check_count(struct xfs_mount *, |
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| 61 | struct xfs_inobt_rec_incore *); |
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| 62 | #else |
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| 63 | #define xfs_inobt_rec_check_count(mp, rec) 0 |
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| 64 | #endif /* DEBUG */ |
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| 65 | |
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| 66 | int xfs_finobt_calc_reserves(struct xfs_perag *perag, struct xfs_trans *tp, |
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| 67 | xfs_extlen_t *ask, xfs_extlen_t *used); |
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| 68 | extern xfs_extlen_t xfs_iallocbt_calc_size(struct xfs_mount *mp, |
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| 69 | unsigned long long len); |
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| 70 | |
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| 71 | void xfs_inobt_commit_staged_btree(struct xfs_btree_cur *cur, |
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| 72 | struct xfs_trans *tp, struct xfs_buf *agbp); |
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| 73 | |
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| 74 | unsigned int xfs_iallocbt_maxlevels_ondisk(void); |
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| 75 | |
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| 76 | int __init xfs_inobt_init_cur_cache(void); |
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| 77 | void xfs_inobt_destroy_cur_cache(void); |
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| 78 | |
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| 79 | #endif /* __XFS_IALLOC_BTREE_H__ */ |
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| 80 | |
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