1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2000,2005 Silicon Graphics, Inc. 4 * All Rights Reserved. 5 */ 6 #ifndef __XFS_IALLOC_BTREE_H__ 7 #define __XFS_IALLOC_BTREE_H__ 8 9 /* 10 * Inode map on-disk structures 11 */ 12 13 struct xfs_buf; 14 struct xfs_btree_cur; 15 struct xfs_mount; 16 17 /* 18 * Btree block header size depends on a superblock flag. 19 */ 20 #define XFS_INOBT_BLOCK_LEN(mp) \ 21 (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \ 22 XFS_BTREE_SBLOCK_CRC_LEN : XFS_BTREE_SBLOCK_LEN) 23 24 /* 25 * Record, key, and pointer address macros for btree blocks. 26 * 27 * (note that some of these may appear unused, but they are used in userspace) 28 */ 29 #define XFS_INOBT_REC_ADDR(mp, block, index) \ 30 ((xfs_inobt_rec_t *) \ 31 ((char *)(block) + \ 32 XFS_INOBT_BLOCK_LEN(mp) + \ 33 (((index) - 1) * sizeof(xfs_inobt_rec_t)))) 34 35 #define XFS_INOBT_KEY_ADDR(mp, block, index) \ 36 ((xfs_inobt_key_t *) \ 37 ((char *)(block) + \ 38 XFS_INOBT_BLOCK_LEN(mp) + \ 39 ((index) - 1) * sizeof(xfs_inobt_key_t))) 40 41 #define XFS_INOBT_PTR_ADDR(mp, block, index, maxrecs) \ 42 ((xfs_inobt_ptr_t *) \ 43 ((char *)(block) + \ 44 XFS_INOBT_BLOCK_LEN(mp) + \ 45 (maxrecs) * sizeof(xfs_inobt_key_t) + \ 46 ((index) - 1) * sizeof(xfs_inobt_ptr_t))) 47 48 extern struct xfs_btree_cur *xfs_inobt_init_cursor(struct xfs_mount *, 49 struct xfs_trans *, struct xfs_buf *, xfs_agnumber_t, 50 xfs_btnum_t); 51 extern int xfs_inobt_maxrecs(struct xfs_mount *, int, int); 52 53 /* ir_holemask to inode allocation bitmap conversion */ 54 uint64_t xfs_inobt_irec_to_allocmask(struct xfs_inobt_rec_incore *); 55 56 #if defined(DEBUG) || defined(XFS_WARN) 57 int xfs_inobt_rec_check_count(struct xfs_mount *, 58 struct xfs_inobt_rec_incore *); 59 #else 60 #define xfs_inobt_rec_check_count(mp, rec) 0 61 #endif /* DEBUG */ 62 63 int xfs_finobt_calc_reserves(struct xfs_mount *mp, struct xfs_trans *tp, 64 xfs_agnumber_t agno, xfs_extlen_t *ask, xfs_extlen_t *used); 65 extern xfs_extlen_t xfs_iallocbt_calc_size(struct xfs_mount *mp, 66 unsigned long long len); 67 int xfs_inobt_cur(struct xfs_mount *mp, struct xfs_trans *tp, 68 xfs_agnumber_t agno, xfs_btnum_t btnum, 69 struct xfs_btree_cur **curpp, struct xfs_buf **agi_bpp); 70 71 #endif /* __XFS_IALLOC_BTREE_H__ */ 72