projects / thirdparty / xfsprogs-dev.git / blame
| Commit | Line | Data |
|---|---|---|
| 2bd0ea18 | 1 | /* |
| f302e9e4 NS |
2 | * Copyright (c) 2000,2005 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_ALLOC_BTREE_H__ | |
| dfc130f3 | 19 | #define __XFS_ALLOC_BTREE_H__ |
| 2bd0ea18 NS |
20 | |
| 21 | /* | |
| 22 | * Freespace on-disk structures | |
| 23 | */ | |
| 24 | ||
| 25 | struct xfs_buf; | |
| 26 | struct xfs_btree_cur; | |
| 2bd0ea18 NS |
27 | struct xfs_mount; |
| 28 | ||
| 2bd0ea18 | 29 | /* |
| b3563c19 | 30 | * Btree block header size depends on a superblock flag. |
| 2bd0ea18 | 31 | */ |
| 5dfa5cd2 DC |
32 | #define XFS_ALLOC_BLOCK_LEN(mp) \ |
| 33 | (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \ | |
| 79737cd9 | 34 | XFS_BTREE_SBLOCK_CRC_LEN : XFS_BTREE_SBLOCK_LEN) |
| 2bd0ea18 | 35 | |
| b3563c19 BN |
36 | /* |
| 37 | * Record, key, and pointer address macros for btree blocks. | |
| 38 | * | |
| 39 | * (note that some of these may appear unused, but they are used in userspace) | |
| 40 | */ | |
| 41 | #define XFS_ALLOC_REC_ADDR(mp, block, index) \ | |
| 42 | ((xfs_alloc_rec_t *) \ | |
| 43 | ((char *)(block) + \ | |
| 44 | XFS_ALLOC_BLOCK_LEN(mp) + \ | |
| 45 | (((index) - 1) * sizeof(xfs_alloc_rec_t)))) | |
| 46 | ||
| 47 | #define XFS_ALLOC_KEY_ADDR(mp, block, index) \ | |
| 48 | ((xfs_alloc_key_t *) \ | |
| 49 | ((char *)(block) + \ | |
| 50 | XFS_ALLOC_BLOCK_LEN(mp) + \ | |
| 51 | ((index) - 1) * sizeof(xfs_alloc_key_t))) | |
| 52 | ||
| 53 | #define XFS_ALLOC_PTR_ADDR(mp, block, index, maxrecs) \ | |
| 54 | ((xfs_alloc_ptr_t *) \ | |
| 55 | ((char *)(block) + \ | |
| 56 | XFS_ALLOC_BLOCK_LEN(mp) + \ | |
| 57 | (maxrecs) * sizeof(xfs_alloc_key_t) + \ | |
| 58 | ((index) - 1) * sizeof(xfs_alloc_ptr_t))) | |
| 2bd0ea18 | 59 | |
| b194c7d8 BN |
60 | extern struct xfs_btree_cur *xfs_allocbt_init_cursor(struct xfs_mount *, |
| 61 | struct xfs_trans *, struct xfs_buf *, | |
| 62 | xfs_agnumber_t, xfs_btnum_t); | |
| b3563c19 | 63 | extern int xfs_allocbt_maxrecs(struct xfs_mount *, int, int); |
| 2bd0ea18 NS |
64 | |
| 65 | #endif /* __XFS_ALLOC_BTREE_H__ */ |