tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
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
7 * published by the Free Software Foundation.
8 *
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.
13 *
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
17 */
18#ifndef __XFS_INUM_H__
19#define __XFS_INUM_H__
20
21/*
22 * Inode number format:
23 * low inopblog bits - offset in block
24 * next agblklog bits - block number in ag
25 * next agno_log bits - ag number
26 * high agno_log-agblklog-inopblog bits - 0
27 */
28
29struct xfs_mount;
30
31#define XFS_INO_MASK(k) (__uint32_t)((1ULL << (k)) - 1)
32#define XFS_INO_OFFSET_BITS(mp) (mp)->m_sb.sb_inopblog
33#define XFS_INO_AGBNO_BITS(mp) (mp)->m_sb.sb_agblklog
34#define XFS_INO_AGINO_BITS(mp) (mp)->m_agino_log
35#define XFS_INO_AGNO_BITS(mp) (mp)->m_agno_log
36#define XFS_INO_BITS(mp) \
37 XFS_INO_AGNO_BITS(mp) + XFS_INO_AGINO_BITS(mp)
38#define XFS_INO_TO_AGNO(mp,i) \
39 ((xfs_agnumber_t)((i) >> XFS_INO_AGINO_BITS(mp)))
40#define XFS_INO_TO_AGINO(mp,i) \
41 ((xfs_agino_t)(i) & XFS_INO_MASK(XFS_INO_AGINO_BITS(mp)))
42#define XFS_INO_TO_AGBNO(mp,i) \
43 (((xfs_agblock_t)(i) >> XFS_INO_OFFSET_BITS(mp)) & \
44 XFS_INO_MASK(XFS_INO_AGBNO_BITS(mp)))
45#define XFS_INO_TO_OFFSET(mp,i) \
46 ((int)(i) & XFS_INO_MASK(XFS_INO_OFFSET_BITS(mp)))
47#define XFS_INO_TO_FSB(mp,i) \
48 XFS_AGB_TO_FSB(mp, XFS_INO_TO_AGNO(mp,i), XFS_INO_TO_AGBNO(mp,i))
49#define XFS_AGINO_TO_INO(mp,a,i) \
50 (((xfs_ino_t)(a) << XFS_INO_AGINO_BITS(mp)) | (i))
51#define XFS_AGINO_TO_AGBNO(mp,i) ((i) >> XFS_INO_OFFSET_BITS(mp))
52#define XFS_AGINO_TO_OFFSET(mp,i) \
53 ((i) & XFS_INO_MASK(XFS_INO_OFFSET_BITS(mp)))
54#define XFS_OFFBNO_TO_AGINO(mp,b,o) \
55 ((xfs_agino_t)(((b) << XFS_INO_OFFSET_BITS(mp)) | (o)))
56
57#if XFS_BIG_INUMS
58#define XFS_MAXINUMBER ((xfs_ino_t)((1ULL << 56) - 1ULL))
59#else
60#define XFS_MAXINUMBER ((xfs_ino_t)((1ULL << 32) - 1ULL))
61#endif
62#define XFS_MAXINUMBER_32 ((xfs_ino_t)((1ULL << 32) - 1ULL))
63
64#endif /* __XFS_INUM_H__ */