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 struct xfs_perag; 17 18 /* 19 * Btree block header size depends on a superblock flag. 20 */ 21 #define XFS_INOBT_BLOCK_LEN(mp) \ 22 (xfs_has_crc(((mp))) ? \ 23 XFS_BTREE_SBLOCK_CRC_LEN : XFS_BTREE_SBLOCK_LEN) 24 25 /* 26 * Record, key, and pointer address macros for btree blocks. 27 * 28 * (note that some of these may appear unused, but they are used in userspace) 29 */ 30 #define XFS_INOBT_REC_ADDR(mp, block, index) \ 31 ((xfs_inobt_rec_t *) \ 32 ((char *)(block) + \ 33 XFS_INOBT_BLOCK_LEN(mp) + \ 34 (((index) - 1) * sizeof(xfs_inobt_rec_t)))) 35 36 #define XFS_INOBT_KEY_ADDR(mp, block, index) \ 37 ((xfs_inobt_key_t *) \ 38 ((char *)(block) + \ 39 XFS_INOBT_BLOCK_LEN(mp) + \ 40 ((index) - 1) * sizeof(xfs_inobt_key_t))) 41 42 #define XFS_INOBT_PTR_ADDR(mp, block, index, maxrecs) \ 43 ((xfs_inobt_ptr_t *) \ 44 ((char *)(block) + \ 45 XFS_INOBT_BLOCK_LEN(mp) + \ 46 (maxrecs) * sizeof(xfs_inobt_key_t) + \ 47 ((index) - 1) * sizeof(xfs_inobt_ptr_t))) 48 49 struct xfs_btree_cur *xfs_inobt_init_cursor(struct xfs_perag *pag, 50 struct xfs_trans *tp, struct xfs_buf *agbp); 51 struct xfs_btree_cur *xfs_finobt_init_cursor(struct xfs_perag *pag, 52 struct xfs_trans *tp, struct xfs_buf *agbp); 53 unsigned int xfs_inobt_maxrecs(struct xfs_mount *mp, unsigned int blocklen, 54 bool leaf); 55 56 /* ir_holemask to inode allocation bitmap conversion */ 57 uint64_t xfs_inobt_irec_to_allocmask(const struct xfs_inobt_rec_incore *irec); 58 59 #if defined(DEBUG) || defined(XFS_WARN) 60 int xfs_inobt_rec_check_count(struct xfs_mount *, 61 struct xfs_inobt_rec_incore *); 62 #else 63 #define xfs_inobt_rec_check_count(mp, rec) 0 64 #endif /* DEBUG */ 65 66 int xfs_finobt_calc_reserves(struct xfs_perag *perag, struct xfs_trans *tp, 67 xfs_extlen_t *ask, xfs_extlen_t *used); 68 extern xfs_extlen_t xfs_iallocbt_calc_size(struct xfs_mount *mp, 69 unsigned long long len); 70 71 void xfs_inobt_commit_staged_btree(struct xfs_btree_cur *cur, 72 struct xfs_trans *tp, struct xfs_buf *agbp); 73 74 unsigned int xfs_iallocbt_maxlevels_ondisk(void); 75 76 int __init xfs_inobt_init_cur_cache(void); 77 void xfs_inobt_destroy_cur_cache(void); 78 79 #endif /* __XFS_IALLOC_BTREE_H__ */ 80