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__ */ 174