1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (c) 2000,2002-2005 Silicon Graphics, Inc. 4 * All Rights Reserved. 5 */ 6 #ifndef __XFS_BMAP_BTREE_H__ 7 #define __XFS_BMAP_BTREE_H__ 8 9 struct xfs_btree_cur; 10 struct xfs_btree_block; 11 struct xfs_mount; 12 struct xfs_inode; 13 struct xfs_trans; 14 15 /* 16 * Btree block header size depends on a superblock flag. 17 */ 18 #define XFS_BMBT_BLOCK_LEN(mp) \ 19 (xfs_has_crc(((mp))) ? \ 20 XFS_BTREE_LBLOCK_CRC_LEN : XFS_BTREE_LBLOCK_LEN) 21 22 #define XFS_BMBT_REC_ADDR(mp, block, index) \ 23 ((xfs_bmbt_rec_t *) \ 24 ((char *)(block) + \ 25 XFS_BMBT_BLOCK_LEN(mp) + \ 26 ((index) - 1) * sizeof(xfs_bmbt_rec_t))) 27 28 #define XFS_BMBT_KEY_ADDR(mp, block, index) \ 29 ((xfs_bmbt_key_t *) \ 30 ((char *)(block) + \ 31 XFS_BMBT_BLOCK_LEN(mp) + \ 32 ((index) - 1) * sizeof(xfs_bmbt_key_t))) 33 34 #define XFS_BMBT_PTR_ADDR(mp, block, index, maxrecs) \ 35 ((xfs_bmbt_ptr_t *) \ 36 ((char *)(block) + \ 37 XFS_BMBT_BLOCK_LEN(mp) + \ 38 (maxrecs) * sizeof(xfs_bmbt_key_t) + \ 39 ((index) - 1) * sizeof(xfs_bmbt_ptr_t))) 40 41 #define XFS_BMDR_REC_ADDR(block, index) \ 42 ((xfs_bmdr_rec_t *) \ 43 ((char *)(block) + \ 44 sizeof(struct xfs_bmdr_block) + \ 45 ((index) - 1) * sizeof(xfs_bmdr_rec_t))) 46 47 #define XFS_BMDR_KEY_ADDR(block, index) \ 48 ((xfs_bmdr_key_t *) \ 49 ((char *)(block) + \ 50 sizeof(struct xfs_bmdr_block) + \ 51 ((index) - 1) * sizeof(xfs_bmdr_key_t))) 52 53 #define XFS_BMDR_PTR_ADDR(block, index, maxrecs) \ 54 ((xfs_bmdr_ptr_t *) \ 55 ((char *)(block) + \ 56 sizeof(struct xfs_bmdr_block) + \ 57 (maxrecs) * sizeof(xfs_bmdr_key_t) + \ 58 ((index) - 1) * sizeof(xfs_bmdr_ptr_t))) 59 60 /* 61 * These are to be used when we know the size of the block and 62 * we don't have a cursor. 63 */ 64 #define XFS_BMAP_BROOT_PTR_ADDR(mp, bb, i, sz) \ 65 XFS_BMBT_PTR_ADDR(mp, bb, i, xfs_bmbt_maxrecs(mp, sz, 0)) 66 67 #define XFS_BMAP_BROOT_SPACE_CALC(mp, nrecs) \ 68 (int)(XFS_BMBT_BLOCK_LEN(mp) + \ 69 ((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t)))) 70 71 #define XFS_BMAP_BROOT_SPACE(mp, bb) \ 72 (XFS_BMAP_BROOT_SPACE_CALC(mp, be16_to_cpu((bb)->bb_numrecs))) 73 #define XFS_BMDR_SPACE_CALC(nrecs) \ 74 (int)(sizeof(xfs_bmdr_block_t) + \ 75 ((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t)))) 76 #define XFS_BMAP_BMDR_SPACE(bb) \ 77 (XFS_BMDR_SPACE_CALC(be16_to_cpu((bb)->bb_numrecs))) 78 79 /* 80 * Maximum number of bmap btree levels. 81 */ 82 #define XFS_BM_MAXLEVELS(mp,w) ((mp)->m_bm_maxlevels[(w)]) 83 84 /* 85 * Prototypes for xfs_bmap.c to call. 86 */ 87 extern void xfs_bmdr_to_bmbt(struct xfs_inode *, xfs_bmdr_block_t *, int, 88 struct xfs_btree_block *, int); 89 90 void xfs_bmbt_disk_set_all(struct xfs_bmbt_rec *r, struct xfs_bmbt_irec *s); 91 extern xfs_filblks_t xfs_bmbt_disk_get_blockcount(const struct xfs_bmbt_rec *r); 92 extern xfs_fileoff_t xfs_bmbt_disk_get_startoff(const struct xfs_bmbt_rec *r); 93 void xfs_bmbt_disk_get_all(const struct xfs_bmbt_rec *r, 94 struct xfs_bmbt_irec *s); 95 96 extern void xfs_bmbt_to_bmdr(struct xfs_mount *, struct xfs_btree_block *, int, 97 xfs_bmdr_block_t *, int); 98 99 extern int xfs_bmbt_get_maxrecs(struct xfs_btree_cur *, int level); 100 extern int xfs_bmdr_maxrecs(int blocklen, int leaf); 101 extern int xfs_bmbt_maxrecs(struct xfs_mount *, int blocklen, int leaf); 102 103 extern int xfs_bmbt_change_owner(struct xfs_trans *tp, struct xfs_inode *ip, 104 int whichfork, xfs_ino_t new_owner, 105 struct list_head *buffer_list); 106 107 extern struct xfs_btree_cur *xfs_bmbt_init_cursor(struct xfs_mount *, 108 struct xfs_trans *, struct xfs_inode *, int); 109 110 extern unsigned long long xfs_bmbt_calc_size(struct xfs_mount *mp, 111 unsigned long long len); 112 113 unsigned int xfs_bmbt_maxlevels_ondisk(void); 114 115 int __init xfs_bmbt_init_cur_cache(void); 116 void xfs_bmbt_destroy_cur_cache(void); 117 118 #endif /* __XFS_BMAP_BTREE_H__ */ 119