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2bd0ea18 | 1 | /* |
f302e9e4 NS |
2 | * Copyright (c) 2000,2002-2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
5000d01d | 4 | * |
f302e9e4 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
2bd0ea18 | 7 | * published by the Free Software Foundation. |
5000d01d | 8 | * |
f302e9e4 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
5000d01d | 13 | * |
f302e9e4 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
2bd0ea18 NS |
17 | */ |
18 | #ifndef __XFS_BMAP_BTREE_H__ | |
5000d01d | 19 | #define __XFS_BMAP_BTREE_H__ |
2bd0ea18 | 20 | |
2bd0ea18 | 21 | struct xfs_btree_cur; |
b3563c19 | 22 | struct xfs_btree_block; |
2bd0ea18 NS |
23 | struct xfs_mount; |
24 | struct xfs_inode; | |
b194c7d8 | 25 | struct xfs_trans; |
2bd0ea18 | 26 | |
b3563c19 BN |
27 | /* |
28 | * Btree block header size depends on a superblock flag. | |
b3563c19 | 29 | */ |
5dfa5cd2 DC |
30 | #define XFS_BMBT_BLOCK_LEN(mp) \ |
31 | (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \ | |
79737cd9 | 32 | XFS_BTREE_LBLOCK_CRC_LEN : XFS_BTREE_LBLOCK_LEN) |
b3563c19 BN |
33 | |
34 | #define XFS_BMBT_REC_ADDR(mp, block, index) \ | |
35 | ((xfs_bmbt_rec_t *) \ | |
36 | ((char *)(block) + \ | |
37 | XFS_BMBT_BLOCK_LEN(mp) + \ | |
38 | ((index) - 1) * sizeof(xfs_bmbt_rec_t))) | |
39 | ||
40 | #define XFS_BMBT_KEY_ADDR(mp, block, index) \ | |
41 | ((xfs_bmbt_key_t *) \ | |
42 | ((char *)(block) + \ | |
43 | XFS_BMBT_BLOCK_LEN(mp) + \ | |
44 | ((index) - 1) * sizeof(xfs_bmbt_key_t))) | |
45 | ||
46 | #define XFS_BMBT_PTR_ADDR(mp, block, index, maxrecs) \ | |
47 | ((xfs_bmbt_ptr_t *) \ | |
48 | ((char *)(block) + \ | |
49 | XFS_BMBT_BLOCK_LEN(mp) + \ | |
50 | (maxrecs) * sizeof(xfs_bmbt_key_t) + \ | |
51 | ((index) - 1) * sizeof(xfs_bmbt_ptr_t))) | |
52 | ||
53 | #define XFS_BMDR_REC_ADDR(block, index) \ | |
54 | ((xfs_bmdr_rec_t *) \ | |
55 | ((char *)(block) + \ | |
56 | sizeof(struct xfs_bmdr_block) + \ | |
57 | ((index) - 1) * sizeof(xfs_bmdr_rec_t))) | |
58 | ||
59 | #define XFS_BMDR_KEY_ADDR(block, index) \ | |
60 | ((xfs_bmdr_key_t *) \ | |
61 | ((char *)(block) + \ | |
62 | sizeof(struct xfs_bmdr_block) + \ | |
63 | ((index) - 1) * sizeof(xfs_bmdr_key_t))) | |
64 | ||
65 | #define XFS_BMDR_PTR_ADDR(block, index, maxrecs) \ | |
66 | ((xfs_bmdr_ptr_t *) \ | |
67 | ((char *)(block) + \ | |
68 | sizeof(struct xfs_bmdr_block) + \ | |
69 | (maxrecs) * sizeof(xfs_bmdr_key_t) + \ | |
70 | ((index) - 1) * sizeof(xfs_bmdr_ptr_t))) | |
2bd0ea18 NS |
71 | |
72 | /* | |
73 | * These are to be used when we know the size of the block and | |
74 | * we don't have a cursor. | |
75 | */ | |
b3563c19 BN |
76 | #define XFS_BMAP_BROOT_PTR_ADDR(mp, bb, i, sz) \ |
77 | XFS_BMBT_PTR_ADDR(mp, bb, i, xfs_bmbt_maxrecs(mp, sz, 0)) | |
2bd0ea18 | 78 | |
5dfa5cd2 DC |
79 | #define XFS_BMAP_BROOT_SPACE_CALC(mp, nrecs) \ |
80 | (int)(XFS_BMBT_BLOCK_LEN(mp) + \ | |
f302e9e4 NS |
81 | ((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t)))) |
82 | ||
5dfa5cd2 DC |
83 | #define XFS_BMAP_BROOT_SPACE(mp, bb) \ |
84 | (XFS_BMAP_BROOT_SPACE_CALC(mp, be16_to_cpu((bb)->bb_numrecs))) | |
f302e9e4 NS |
85 | #define XFS_BMDR_SPACE_CALC(nrecs) \ |
86 | (int)(sizeof(xfs_bmdr_block_t) + \ | |
87 | ((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t)))) | |
5d90ab5a DC |
88 | #define XFS_BMAP_BMDR_SPACE(bb) \ |
89 | (XFS_BMDR_SPACE_CALC(be16_to_cpu((bb)->bb_numrecs))) | |
2bd0ea18 NS |
90 | |
91 | /* | |
92 | * Maximum number of bmap btree levels. | |
93 | */ | |
f302e9e4 | 94 | #define XFS_BM_MAXLEVELS(mp,w) ((mp)->m_bm_maxlevels[(w)]) |
2bd0ea18 | 95 | |
2bd0ea18 NS |
96 | /* |
97 | * Prototypes for xfs_bmap.c to call. | |
98 | */ | |
5dfa5cd2 | 99 | extern void xfs_bmdr_to_bmbt(struct xfs_inode *, xfs_bmdr_block_t *, int, |
b3563c19 | 100 | struct xfs_btree_block *, int); |
f302e9e4 | 101 | |
d0e5f1ff | 102 | void xfs_bmbt_disk_set_all(struct xfs_bmbt_rec *r, struct xfs_bmbt_irec *s); |
f302e9e4 | 103 | extern xfs_filblks_t xfs_bmbt_disk_get_blockcount(xfs_bmbt_rec_t *r); |
f302e9e4 | 104 | extern xfs_fileoff_t xfs_bmbt_disk_get_startoff(xfs_bmbt_rec_t *r); |
b37d753d | 105 | extern void xfs_bmbt_disk_get_all(xfs_bmbt_rec_t *r, xfs_bmbt_irec_t *s); |
f302e9e4 | 106 | |
b3563c19 BN |
107 | extern void xfs_bmbt_to_bmdr(struct xfs_mount *, struct xfs_btree_block *, int, |
108 | xfs_bmdr_block_t *, int); | |
109 | ||
110 | extern int xfs_bmbt_get_maxrecs(struct xfs_btree_cur *, int level); | |
ff105f75 | 111 | extern int xfs_bmdr_maxrecs(int blocklen, int leaf); |
b3563c19 | 112 | extern int xfs_bmbt_maxrecs(struct xfs_mount *, int blocklen, int leaf); |
b194c7d8 | 113 | |
9c6ebc42 DC |
114 | extern int xfs_bmbt_change_owner(struct xfs_trans *tp, struct xfs_inode *ip, |
115 | int whichfork, xfs_ino_t new_owner, | |
116 | struct list_head *buffer_list); | |
117 | ||
b194c7d8 BN |
118 | extern struct xfs_btree_cur *xfs_bmbt_init_cursor(struct xfs_mount *, |
119 | struct xfs_trans *, struct xfs_inode *, int); | |
2bd0ea18 | 120 | |
2bd0ea18 | 121 | #endif /* __XFS_BMAP_BTREE_H__ */ |