1 /* 2 * Copyright (C) International Business Machines Corp., 2000-2004 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 12 * the 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 to the Free Software 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 17 */ 18 #ifndef _H_JFS_TYPES 19 #define _H_JFS_TYPES 20 21 /* 22 * jfs_types.h: 23 * 24 * basic type/utility definitions 25 * 26 * note: this header file must be the 1st include file 27 * of JFS include list in all JFS .c file. 28 */ 29 30 #include <linux/types.h> 31 #include <linux/nls.h> 32 33 /* 34 * transaction and lock id's 35 * 36 * Don't change these without carefully considering the impact on the 37 * size and alignment of all of the linelock variants 38 */ 39 typedef u16 tid_t; 40 typedef u16 lid_t; 41 42 /* 43 * Almost identical to Linux's timespec, but not quite 44 */ 45 struct timestruc_t { 46 u32 tv_sec; 47 u32 tv_nsec; 48 }; 49 50 /* 51 * handy 52 */ 53 54 #define LEFTMOSTONE 0x80000000 55 #define HIGHORDER 0x80000000u /* high order bit on */ 56 #define ONES 0xffffffffu /* all bit on */ 57 58 typedef int boolean_t; 59 #define TRUE 1 60 #define FALSE 0 61 62 /* 63 * logical xd (lxd) 64 */ 65 typedef struct { 66 unsigned len:24; 67 unsigned off1:8; 68 u32 off2; 69 } lxd_t; 70 71 /* lxd_t field construction */ 72 #define LXDlength(lxd, length32) ( (lxd)->len = length32 ) 73 #define LXDoffset(lxd, offset64)\ 74 {\ 75 (lxd)->off1 = ((s64)offset64) >> 32;\ 76 (lxd)->off2 = (offset64) & 0xffffffff;\ 77 } 78 79 /* lxd_t field extraction */ 80 #define lengthLXD(lxd) ( (lxd)->len ) 81 #define offsetLXD(lxd)\ 82 ( ((s64)((lxd)->off1)) << 32 | (lxd)->off2 ) 83 84 /* lxd list */ 85 struct lxdlist { 86 s16 maxnlxd; 87 s16 nlxd; 88 lxd_t *lxd; 89 }; 90 91 /* 92 * physical xd (pxd) 93 */ 94 typedef struct { 95 unsigned len:24; 96 unsigned addr1:8; 97 u32 addr2; 98 } pxd_t; 99 100 /* xd_t field construction */ 101 102 #define PXDlength(pxd, length32) ((pxd)->len = __cpu_to_le24(length32)) 103 #define PXDaddress(pxd, address64)\ 104 {\ 105 (pxd)->addr1 = ((s64)address64) >> 32;\ 106 (pxd)->addr2 = __cpu_to_le32((address64) & 0xffffffff);\ 107 } 108 109 /* xd_t field extraction */ 110 #define lengthPXD(pxd) __le24_to_cpu((pxd)->len) 111 #define addressPXD(pxd)\ 112 ( ((s64)((pxd)->addr1)) << 32 | __le32_to_cpu((pxd)->addr2)) 113 114 #define MAXTREEHEIGHT 8 115 /* pxd list */ 116 struct pxdlist { 117 s16 maxnpxd; 118 s16 npxd; 119 pxd_t pxd[MAXTREEHEIGHT]; 120 }; 121 122 123 /* 124 * data extent descriptor (dxd) 125 */ 126 typedef struct { 127 unsigned flag:8; /* 1: flags */ 128 unsigned rsrvd:24; /* 3: */ 129 u32 size; /* 4: size in byte */ 130 unsigned len:24; /* 3: length in unit of fsblksize */ 131 unsigned addr1:8; /* 1: address in unit of fsblksize */ 132 u32 addr2; /* 4: address in unit of fsblksize */ 133 } dxd_t; /* - 16 - */ 134 135 /* dxd_t flags */ 136 #define DXD_INDEX 0x80 /* B+-tree index */ 137 #define DXD_INLINE 0x40 /* in-line data extent */ 138 #define DXD_EXTENT 0x20 /* out-of-line single extent */ 139 #define DXD_FILE 0x10 /* out-of-line file (inode) */ 140 #define DXD_CORRUPT 0x08 /* Inconsistency detected */ 141 142 /* dxd_t field construction 143 * Conveniently, the PXD macros work for DXD 144 */ 145 #define DXDlength PXDlength 146 #define DXDaddress PXDaddress 147 #define lengthDXD lengthPXD 148 #define addressDXD addressPXD 149 #define DXDsize(dxd, size32) ((dxd)->size = cpu_to_le32(size32)) 150 #define sizeDXD(dxd) le32_to_cpu((dxd)->size) 151 152 /* 153 * directory entry argument 154 */ 155 struct component_name { 156 int namlen; 157 wchar_t *name; 158 }; 159 160 161 /* 162 * DASD limit information - stored in directory inode 163 */ 164 struct dasd { 165 u8 thresh; /* Alert Threshold (in percent) */ 166 u8 delta; /* Alert Threshold delta (in percent) */ 167 u8 rsrvd1; 168 u8 limit_hi; /* DASD limit (in logical blocks) */ 169 u32 limit_lo; /* DASD limit (in logical blocks) */ 170 u8 rsrvd2[3]; 171 u8 used_hi; /* DASD usage (in logical blocks) */ 172 u32 used_lo; /* DASD usage (in logical blocks) */ 173 }; 174 175 #define DASDLIMIT(dasdp) \ 176 (((u64)((dasdp)->limit_hi) << 32) + __le32_to_cpu((dasdp)->limit_lo)) 177 #define setDASDLIMIT(dasdp, limit)\ 178 {\ 179 (dasdp)->limit_hi = ((u64)limit) >> 32;\ 180 (dasdp)->limit_lo = __cpu_to_le32(limit);\ 181 } 182 #define DASDUSED(dasdp) \ 183 (((u64)((dasdp)->used_hi) << 32) + __le32_to_cpu((dasdp)->used_lo)) 184 #define setDASDUSED(dasdp, used)\ 185 {\ 186 (dasdp)->used_hi = ((u64)used) >> 32;\ 187 (dasdp)->used_lo = __cpu_to_le32(used);\ 188 } 189 190 #endif /* !_H_JFS_TYPES */ 191