Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 2 | * Copyright (c) 2000,2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 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 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * published by the Free Software Foundation. |
| 8 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 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. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 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 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | */ |
| 18 | #ifndef __XFS_IALLOC_BTREE_H__ |
| 19 | #define __XFS_IALLOC_BTREE_H__ |
| 20 | |
| 21 | /* |
| 22 | * Inode map on-disk structures |
| 23 | */ |
| 24 | |
| 25 | struct xfs_buf; |
| 26 | struct xfs_btree_cur; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | struct xfs_mount; |
| 28 | |
| 29 | /* |
Christoph Hellwig | 7cc95a8 | 2008-10-30 17:14:34 +1100 | [diff] [blame] | 30 | * Btree block header size depends on a superblock flag. |
Christoph Hellwig | 7cc95a8 | 2008-10-30 17:14:34 +1100 | [diff] [blame] | 31 | */ |
Christoph Hellwig | ee1a47a | 2013-04-21 14:53:46 -0500 | [diff] [blame] | 32 | #define XFS_INOBT_BLOCK_LEN(mp) \ |
| 33 | (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \ |
| 34 | XFS_BTREE_SBLOCK_CRC_LEN : XFS_BTREE_SBLOCK_LEN) |
Christoph Hellwig | 7cc95a8 | 2008-10-30 17:14:34 +1100 | [diff] [blame] | 35 | |
| 36 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | * Record, key, and pointer address macros for btree blocks. |
Christoph Hellwig | 136341b | 2008-10-30 17:11:40 +1100 | [diff] [blame] | 38 | * |
| 39 | * (note that some of these may appear unused, but they are used in userspace) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | */ |
Christoph Hellwig | 136341b | 2008-10-30 17:11:40 +1100 | [diff] [blame] | 41 | #define XFS_INOBT_REC_ADDR(mp, block, index) \ |
| 42 | ((xfs_inobt_rec_t *) \ |
| 43 | ((char *)(block) + \ |
Christoph Hellwig | 7cc95a8 | 2008-10-30 17:14:34 +1100 | [diff] [blame] | 44 | XFS_INOBT_BLOCK_LEN(mp) + \ |
Christoph Hellwig | 136341b | 2008-10-30 17:11:40 +1100 | [diff] [blame] | 45 | (((index) - 1) * sizeof(xfs_inobt_rec_t)))) |
Eric Sandeen | 2c36dde | 2007-02-10 18:37:33 +1100 | [diff] [blame] | 46 | |
Christoph Hellwig | 136341b | 2008-10-30 17:11:40 +1100 | [diff] [blame] | 47 | #define XFS_INOBT_KEY_ADDR(mp, block, index) \ |
| 48 | ((xfs_inobt_key_t *) \ |
| 49 | ((char *)(block) + \ |
Christoph Hellwig | 7cc95a8 | 2008-10-30 17:14:34 +1100 | [diff] [blame] | 50 | XFS_INOBT_BLOCK_LEN(mp) + \ |
Christoph Hellwig | 136341b | 2008-10-30 17:11:40 +1100 | [diff] [blame] | 51 | ((index) - 1) * sizeof(xfs_inobt_key_t))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
Christoph Hellwig | 136341b | 2008-10-30 17:11:40 +1100 | [diff] [blame] | 53 | #define XFS_INOBT_PTR_ADDR(mp, block, index, maxrecs) \ |
| 54 | ((xfs_inobt_ptr_t *) \ |
| 55 | ((char *)(block) + \ |
Christoph Hellwig | 7cc95a8 | 2008-10-30 17:14:34 +1100 | [diff] [blame] | 56 | XFS_INOBT_BLOCK_LEN(mp) + \ |
Christoph Hellwig | 136341b | 2008-10-30 17:11:40 +1100 | [diff] [blame] | 57 | (maxrecs) * sizeof(xfs_inobt_key_t) + \ |
| 58 | ((index) - 1) * sizeof(xfs_inobt_ptr_t))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
Christoph Hellwig | 561f7d1 | 2008-10-30 16:53:59 +1100 | [diff] [blame] | 60 | extern struct xfs_btree_cur *xfs_inobt_init_cursor(struct xfs_mount *, |
| 61 | struct xfs_trans *, struct xfs_buf *, xfs_agnumber_t); |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 62 | extern int xfs_inobt_maxrecs(struct xfs_mount *, int, int); |
Christoph Hellwig | 561f7d1 | 2008-10-30 16:53:59 +1100 | [diff] [blame] | 63 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | #endif /* __XFS_IALLOC_BTREE_H__ */ |