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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 | |
29 | typedef __uint32_t xfs_agino_t; /* within allocation grp inode number */ |
30 | |
31 | /* |
32 | * Useful inode bits for this kernel. |
33 | * Used in some places where having 64-bits in the 32-bit kernels |
34 | * costs too much. |
35 | */ |
36 | #if XFS_BIG_INUMS |
37 | typedef xfs_ino_t xfs_intino_t; |
38 | #else |
39 | typedef __uint32_t xfs_intino_t; |
40 | #endif |
41 | |
42 | #define NULLFSINO ((xfs_ino_t)-1) |
43 | #define NULLAGINO ((xfs_agino_t)-1) |
44 | |
45 | struct xfs_mount; |
46 | |
47 | #define XFS_INO_MASK(k) (__uint32_t)((1ULL << (k)) - 1) |
48 | #define XFS_INO_OFFSET_BITS(mp) (mp)->m_sb.sb_inopblog |
49 | #define XFS_INO_AGBNO_BITS(mp) (mp)->m_sb.sb_agblklog |
50 | #define XFS_INO_AGINO_BITS(mp) (mp)->m_agino_log |
51 | #define XFS_INO_AGNO_BITS(mp) (mp)->m_agno_log |
52 | #define XFS_INO_BITS(mp) \ |
53 | XFS_INO_AGNO_BITS(mp) + XFS_INO_AGINO_BITS(mp) |
54 | #define XFS_INO_TO_AGNO(mp,i) \ |
55 | ((xfs_agnumber_t)((i) >> XFS_INO_AGINO_BITS(mp))) |
56 | #define XFS_INO_TO_AGINO(mp,i) \ |
57 | ((xfs_agino_t)(i) & XFS_INO_MASK(XFS_INO_AGINO_BITS(mp))) |
58 | #define XFS_INO_TO_AGBNO(mp,i) \ |
59 | (((xfs_agblock_t)(i) >> XFS_INO_OFFSET_BITS(mp)) & \ |
60 | XFS_INO_MASK(XFS_INO_AGBNO_BITS(mp))) |
61 | #define XFS_INO_TO_OFFSET(mp,i) \ |
62 | ((int)(i) & XFS_INO_MASK(XFS_INO_OFFSET_BITS(mp))) |
63 | #define XFS_INO_TO_FSB(mp,i) \ |
64 | XFS_AGB_TO_FSB(mp, XFS_INO_TO_AGNO(mp,i), XFS_INO_TO_AGBNO(mp,i)) |
65 | #define XFS_AGINO_TO_INO(mp,a,i) \ |
66 | (((xfs_ino_t)(a) << XFS_INO_AGINO_BITS(mp)) | (i)) |
67 | #define XFS_AGINO_TO_AGBNO(mp,i) ((i) >> XFS_INO_OFFSET_BITS(mp)) |
68 | #define XFS_AGINO_TO_OFFSET(mp,i) \ |
69 | ((i) & XFS_INO_MASK(XFS_INO_OFFSET_BITS(mp))) |
70 | #define XFS_OFFBNO_TO_AGINO(mp,b,o) \ |
71 | ((xfs_agino_t)(((b) << XFS_INO_OFFSET_BITS(mp)) | (o))) |
72 | |
73 | #if XFS_BIG_INUMS |
74 | #define XFS_MAXINUMBER ((xfs_ino_t)((1ULL << 56) - 1ULL)) |
75 | #define XFS_INO64_OFFSET ((xfs_ino_t)(1ULL << 32)) |
76 | #else |
77 | #define XFS_MAXINUMBER ((xfs_ino_t)((1ULL << 32) - 1ULL)) |
78 | #endif |
79 | #define XFS_MAXINUMBER_32 ((xfs_ino_t)((1ULL << 32) - 1ULL)) |
80 | |
81 | #endif /* __XFS_INUM_H__ */ |
82 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9