Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of version 2 of the GNU General Public License as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it would be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
11 | * | |
12 | * Further, this software is distributed without any warranty that it is | |
13 | * free of the rightful claim of any third person regarding infringement | |
14 | * or the like. Any license provided herein, whether implied or | |
15 | * otherwise, applies only to this software file. Patent licenses, if | |
16 | * any, provided herein do not apply to combinations of this program with | |
17 | * other software, or any other product whatsoever. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write the Free Software Foundation, Inc., 59 | |
21 | * Temple Place - Suite 330, Boston MA 02111-1307, USA. | |
22 | * | |
23 | * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, | |
24 | * Mountain View, CA 94043, or: | |
25 | * | |
26 | * http://www.sgi.com | |
27 | * | |
28 | * For further information regarding this notice, see: | |
29 | * | |
30 | * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ | |
31 | */ | |
32 | #ifndef __XFS_INUM_H__ | |
33 | #define __XFS_INUM_H__ | |
34 | ||
35 | /* | |
36 | * Inode number format: | |
37 | * low inopblog bits - offset in block | |
38 | * next agblklog bits - block number in ag | |
39 | * next agno_log bits - ag number | |
40 | * high agno_log-agblklog-inopblog bits - 0 | |
41 | */ | |
42 | ||
43 | typedef __uint32_t xfs_agino_t; /* within allocation grp inode number */ | |
44 | ||
45 | /* | |
46 | * Useful inode bits for this kernel. | |
47 | * Used in some places where having 64-bits in the 32-bit kernels | |
48 | * costs too much. | |
49 | */ | |
50 | #if XFS_BIG_INUMS | |
51 | typedef xfs_ino_t xfs_intino_t; | |
52 | #else | |
53 | typedef __uint32_t xfs_intino_t; | |
54 | #endif | |
55 | ||
56 | #define NULLFSINO ((xfs_ino_t)-1) | |
57 | #define NULLAGINO ((xfs_agino_t)-1) | |
58 | ||
59 | struct xfs_mount; | |
60 | ||
61 | #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INO_MASK) | |
62 | __uint32_t xfs_ino_mask(int k); | |
63 | #define XFS_INO_MASK(k) xfs_ino_mask(k) | |
64 | #else | |
65 | #define XFS_INO_MASK(k) ((__uint32_t)((1ULL << (k)) - 1)) | |
66 | #endif | |
67 | #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INO_OFFSET_BITS) | |
68 | int xfs_ino_offset_bits(struct xfs_mount *mp); | |
69 | #define XFS_INO_OFFSET_BITS(mp) xfs_ino_offset_bits(mp) | |
70 | #else | |
71 | #define XFS_INO_OFFSET_BITS(mp) ((mp)->m_sb.sb_inopblog) | |
72 | #endif | |
73 | #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INO_AGBNO_BITS) | |
74 | int xfs_ino_agbno_bits(struct xfs_mount *mp); | |
75 | #define XFS_INO_AGBNO_BITS(mp) xfs_ino_agbno_bits(mp) | |
76 | #else | |
77 | #define XFS_INO_AGBNO_BITS(mp) ((mp)->m_sb.sb_agblklog) | |
78 | #endif | |
79 | #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INO_AGINO_BITS) | |
80 | int xfs_ino_agino_bits(struct xfs_mount *mp); | |
81 | #define XFS_INO_AGINO_BITS(mp) xfs_ino_agino_bits(mp) | |
82 | #else | |
83 | #define XFS_INO_AGINO_BITS(mp) ((mp)->m_agino_log) | |
84 | #endif | |
85 | #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INO_AGNO_BITS) | |
86 | int xfs_ino_agno_bits(struct xfs_mount *mp); | |
87 | #define XFS_INO_AGNO_BITS(mp) xfs_ino_agno_bits(mp) | |
88 | #else | |
89 | #define XFS_INO_AGNO_BITS(mp) ((mp)->m_agno_log) | |
90 | #endif | |
91 | #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INO_BITS) | |
92 | int xfs_ino_bits(struct xfs_mount *mp); | |
93 | #define XFS_INO_BITS(mp) xfs_ino_bits(mp) | |
94 | #else | |
95 | #define XFS_INO_BITS(mp) (XFS_INO_AGNO_BITS(mp) + XFS_INO_AGINO_BITS(mp)) | |
96 | #endif | |
97 | ||
98 | #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INO_TO_AGNO) | |
99 | xfs_agnumber_t xfs_ino_to_agno(struct xfs_mount *mp, xfs_ino_t i); | |
100 | #define XFS_INO_TO_AGNO(mp,i) xfs_ino_to_agno(mp,i) | |
101 | #else | |
102 | #define XFS_INO_TO_AGNO(mp,i) \ | |
103 | ((xfs_agnumber_t)((i) >> XFS_INO_AGINO_BITS(mp))) | |
104 | #endif | |
105 | #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INO_TO_AGINO) | |
106 | xfs_agino_t xfs_ino_to_agino(struct xfs_mount *mp, xfs_ino_t i); | |
107 | #define XFS_INO_TO_AGINO(mp,i) xfs_ino_to_agino(mp,i) | |
108 | #else | |
109 | #define XFS_INO_TO_AGINO(mp,i) \ | |
110 | ((xfs_agino_t)(i) & XFS_INO_MASK(XFS_INO_AGINO_BITS(mp))) | |
111 | #endif | |
112 | #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INO_TO_AGBNO) | |
113 | xfs_agblock_t xfs_ino_to_agbno(struct xfs_mount *mp, xfs_ino_t i); | |
114 | #define XFS_INO_TO_AGBNO(mp,i) xfs_ino_to_agbno(mp,i) | |
115 | #else | |
116 | #define XFS_INO_TO_AGBNO(mp,i) \ | |
117 | (((xfs_agblock_t)(i) >> XFS_INO_OFFSET_BITS(mp)) & \ | |
118 | XFS_INO_MASK(XFS_INO_AGBNO_BITS(mp))) | |
119 | #endif | |
120 | #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INO_TO_OFFSET) | |
121 | int xfs_ino_to_offset(struct xfs_mount *mp, xfs_ino_t i); | |
122 | #define XFS_INO_TO_OFFSET(mp,i) xfs_ino_to_offset(mp,i) | |
123 | #else | |
124 | #define XFS_INO_TO_OFFSET(mp,i) \ | |
125 | ((int)(i) & XFS_INO_MASK(XFS_INO_OFFSET_BITS(mp))) | |
126 | #endif | |
127 | #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INO_TO_FSB) | |
128 | xfs_fsblock_t xfs_ino_to_fsb(struct xfs_mount *mp, xfs_ino_t i); | |
129 | #define XFS_INO_TO_FSB(mp,i) xfs_ino_to_fsb(mp,i) | |
130 | #else | |
131 | #define XFS_INO_TO_FSB(mp,i) \ | |
132 | XFS_AGB_TO_FSB(mp, XFS_INO_TO_AGNO(mp,i), XFS_INO_TO_AGBNO(mp,i)) | |
133 | #endif | |
134 | ||
135 | #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_AGINO_TO_INO) | |
136 | xfs_ino_t | |
137 | xfs_agino_to_ino(struct xfs_mount *mp, xfs_agnumber_t a, xfs_agino_t i); | |
138 | #define XFS_AGINO_TO_INO(mp,a,i) xfs_agino_to_ino(mp,a,i) | |
139 | #else | |
140 | #define XFS_AGINO_TO_INO(mp,a,i) \ | |
141 | (((xfs_ino_t)(a) << XFS_INO_AGINO_BITS(mp)) | (i)) | |
142 | #endif | |
143 | #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_AGINO_TO_AGBNO) | |
144 | xfs_agblock_t xfs_agino_to_agbno(struct xfs_mount *mp, xfs_agino_t i); | |
145 | #define XFS_AGINO_TO_AGBNO(mp,i) xfs_agino_to_agbno(mp,i) | |
146 | #else | |
147 | #define XFS_AGINO_TO_AGBNO(mp,i) ((i) >> XFS_INO_OFFSET_BITS(mp)) | |
148 | #endif | |
149 | #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_AGINO_TO_OFFSET) | |
150 | int xfs_agino_to_offset(struct xfs_mount *mp, xfs_agino_t i); | |
151 | #define XFS_AGINO_TO_OFFSET(mp,i) xfs_agino_to_offset(mp,i) | |
152 | #else | |
153 | #define XFS_AGINO_TO_OFFSET(mp,i) \ | |
154 | ((i) & XFS_INO_MASK(XFS_INO_OFFSET_BITS(mp))) | |
155 | #endif | |
156 | ||
157 | #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_OFFBNO_TO_AGINO) | |
158 | xfs_agino_t xfs_offbno_to_agino(struct xfs_mount *mp, xfs_agblock_t b, int o); | |
159 | #define XFS_OFFBNO_TO_AGINO(mp,b,o) xfs_offbno_to_agino(mp,b,o) | |
160 | #else | |
161 | #define XFS_OFFBNO_TO_AGINO(mp,b,o) \ | |
162 | ((xfs_agino_t)(((b) << XFS_INO_OFFSET_BITS(mp)) | (o))) | |
163 | #endif | |
164 | ||
165 | #if XFS_BIG_INUMS | |
166 | #define XFS_MAXINUMBER ((xfs_ino_t)((1ULL << 56) - 1ULL)) | |
167 | #define XFS_INO64_OFFSET ((xfs_ino_t)(1ULL << 32)) | |
168 | #else | |
169 | #define XFS_MAXINUMBER ((xfs_ino_t)((1ULL << 32) - 1ULL)) | |
170 | #endif | |
171 | #define XFS_MAXINUMBER_32 ((xfs_ino_t)((1ULL << 32) - 1ULL)) | |
172 | ||
173 | #endif /* __XFS_INUM_H__ */ |