| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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__ */ |