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 struct xbtree_ifakeroot; 15 16 /* 17 * Btree block header size depends on a superblock flag. 18 */ 19 #define XFS_BMBT_BLOCK_LEN(mp) \ 20 (xfs_has_crc(((mp))) ? \ 21 XFS_BTREE_LBLOCK_CRC_LEN : XFS_BTREE_LBLOCK_LEN) 22 23 #define XFS_BMBT_REC_ADDR(mp, block, index) \ 24 ((xfs_bmbt_rec_t *) \ 25 ((char *)(block) + \ 26 XFS_BMBT_BLOCK_LEN(mp) + \ 27 ((index) - 1) * sizeof(xfs_bmbt_rec_t))) 28 29 #define XFS_BMBT_KEY_ADDR(mp, block, index) \ 30 ((xfs_bmbt_key_t *) \ 31 ((char *)(block) + \ 32 XFS_BMBT_BLOCK_LEN(mp) + \ 33 ((index) - 1) * sizeof(xfs_bmbt_key_t))) 34 35 #define XFS_BMBT_PTR_ADDR(mp, block, index, maxrecs) \ 36 ((xfs_bmbt_ptr_t *) \ 37 ((char *)(block) + \ 38 XFS_BMBT_BLOCK_LEN(mp) + \ 39 (maxrecs) * sizeof(xfs_bmbt_key_t) + \ 40 ((index) - 1) * sizeof(xfs_bmbt_ptr_t))) 41 42 #define XFS_BMDR_REC_ADDR(block, index) \ 43 ((xfs_bmdr_rec_t *) \ 44 ((char *)(block) + \ 45 sizeof(struct xfs_bmdr_block) + \ 46 ((index) - 1) * sizeof(xfs_bmdr_rec_t))) 47 48 #define XFS_BMDR_KEY_ADDR(block, index) \ 49 ((xfs_bmdr_key_t *) \ 50 ((char *)(block) + \ 51 sizeof(struct xfs_bmdr_block) + \ 52 ((index) - 1) * sizeof(xfs_bmdr_key_t))) 53 54 #define XFS_BMDR_PTR_ADDR(block, index, maxrecs) \ 55 ((xfs_bmdr_ptr_t *) \ 56 ((char *)(block) + \ 57 sizeof(struct xfs_bmdr_block) + \ 58 (maxrecs) * sizeof(xfs_bmdr_key_t) + \ 59 ((index) - 1) * sizeof(xfs_bmdr_ptr_t))) 60 61 /* 62 * These are to be used when we know the size of the block and 63 * we don't have a cursor. 64 */ 65 #define XFS_BMAP_BROOT_PTR_ADDR(mp, bb, i, sz) \ 66 XFS_BMBT_PTR_ADDR(mp, bb, i, xfs_bmbt_maxrecs(mp, sz, 0)) 67 68 #define XFS_BMAP_BROOT_SPACE_CALC(mp, nrecs) \ 69 (int)(XFS_BMBT_BLOCK_LEN(mp) + \ 70 ((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t)))) 71 72 #define XFS_BMAP_BROOT_SPACE(mp, bb) \ 73 (XFS_BMAP_BROOT_SPACE_CALC(mp, be16_to_cpu((bb)->bb_numrecs))) 74 #define XFS_BMDR_SPACE_CALC(nrecs) \ 75 (int)(sizeof(xfs_bmdr_block_t) + \ 76 ((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t)))) 77 #define XFS_BMAP_BMDR_SPACE(bb) \ 78 (XFS_BMDR_SPACE_CALC(be16_to_cpu((bb)->bb_numrecs))) 79 80 /* 81 * Maximum number of bmap btree levels. 82 */ 83 #define XFS_BM_MAXLEVELS(mp,w) ((mp)->m_bm_maxlevels[(w)]) 84 85 /* 86 * Prototypes for xfs_bmap.c to call. 87 */ 88 extern void xfs_bmdr_to_bmbt(struct xfs_inode *, xfs_bmdr_block_t *, int, 89 struct xfs_btree_block *, int); 90 91 void xfs_bmbt_disk_set_all(struct xfs_bmbt_rec *r, struct xfs_bmbt_irec *s); 92 extern xfs_filblks_t xfs_bmbt_disk_get_blockcount(const struct xfs_bmbt_rec *r); 93 extern xfs_fileoff_t xfs_bmbt_disk_get_startoff(const struct xfs_bmbt_rec *r); 94 void xfs_bmbt_disk_get_all(const struct xfs_bmbt_rec *r, 95 struct xfs_bmbt_irec *s); 96 97 extern void xfs_bmbt_to_bmdr(struct xfs_mount *, struct xfs_btree_block *, int, 98 xfs_bmdr_block_t *, int); 99 100 extern int xfs_bmbt_get_maxrecs(struct xfs_btree_cur *, int level); 101 extern int xfs_bmdr_maxrecs(int blocklen, int leaf); 102 extern int xfs_bmbt_maxrecs(struct xfs_mount *, int blocklen, int leaf); 103 104 extern int xfs_bmbt_change_owner(struct xfs_trans *tp, struct xfs_inode *ip, 105 int whichfork, xfs_ino_t new_owner, 106 struct list_head *buffer_list); 107 108 extern struct xfs_btree_cur *xfs_bmbt_init_cursor(struct xfs_mount *, 109 struct xfs_trans *, struct xfs_inode *, int); 110 void xfs_bmbt_commit_staged_btree(struct xfs_btree_cur *cur, 111 struct xfs_trans *tp, int whichfork); 112 113 extern unsigned long long xfs_bmbt_calc_size(struct xfs_mount *mp, 114 unsigned long long len); 115 116 unsigned int xfs_bmbt_maxlevels_ondisk(void); 117 118 int __init xfs_bmbt_init_cur_cache(void); 119 void xfs_bmbt_destroy_cur_cache(void); 120 121 void xfs_bmbt_init_block(struct xfs_inode *ip, struct xfs_btree_block *buf, 122 struct xfs_buf *bp, __u16 level, __u16 numrecs); 123 124 #endif /* __XFS_BMAP_BTREE_H__ */ 125