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 #include "endian24.h" 34 35 /* 36 * transaction and lock id's 37 * 38 * Don't change these without carefully considering the impact on the 39 * size and alignment of all of the linelock variants 40 */ 41 typedef u16 tid_t; 42 typedef u16 lid_t; 43 44 /* 45 * Almost identical to Linux's timespec, but not quite 46 */ 47 struct timestruc_t { 48 __le32 tv_sec; 49 __le32 tv_nsec; 50 }; 51 52 /* 53 * handy 54 */ 55 56 #define LEFTMOSTONE 0x80000000 57 #define HIGHORDER 0x80000000u /* high order bit on */ 58 #define ONES 0xffffffffu /* all bit on */ 59 60 /* 61 * physical xd (pxd) 62 */ 63 typedef struct { 64 unsigned len:24; 65 unsigned addr1:8; 66 __le32 addr2; 67 } pxd_t; 68 69 /* xd_t field construction */ 70 71 #define PXDlength(pxd, length32) ((pxd)->len = __cpu_to_le24(length32)) 72 #define PXDaddress(pxd, address64)\ 73 {\ 74 (pxd)->addr1 = ((s64)address64) >> 32;\ 75 (pxd)->addr2 = __cpu_to_le32((address64) & 0xffffffff);\ 76 } 77 78 /* xd_t field extraction */ 79 #define lengthPXD(pxd) __le24_to_cpu((pxd)->len) 80 #define addressPXD(pxd)\ 81 ( ((s64)((pxd)->addr1)) << 32 | __le32_to_cpu((pxd)->addr2)) 82 83 #define MAXTREEHEIGHT 8 84 /* pxd list */ 85 struct pxdlist { 86 s16 maxnpxd; 87 s16 npxd; 88 pxd_t pxd[MAXTREEHEIGHT]; 89 }; 90 91 92 /* 93 * data extent descriptor (dxd) 94 */ 95 typedef struct { 96 unsigned flag:8; /* 1: flags */ 97 unsigned rsrvd:24; 98 __le32 size; /* 4: size in byte */ 99 unsigned len:24; /* 3: length in unit of fsblksize */ 100 unsigned addr1:8; /* 1: address in unit of fsblksize */ 101 __le32 addr2; /* 4: address in unit of fsblksize */ 102 } dxd_t; /* - 16 - */ 103 104 /* dxd_t flags */ 105 #define DXD_INDEX 0x80 /* B+-tree index */ 106 #define DXD_INLINE 0x40 /* in-line data extent */ 107 #define DXD_EXTENT 0x20 /* out-of-line single extent */ 108 #define DXD_FILE 0x10 /* out-of-line file (inode) */ 109 #define DXD_CORRUPT 0x08 /* Inconsistency detected */ 110 111 /* dxd_t field construction 112 * Conveniently, the PXD macros work for DXD 113 */ 114 #define DXDlength PXDlength 115 #define DXDaddress PXDaddress 116 #define lengthDXD lengthPXD 117 #define addressDXD addressPXD 118 #define DXDsize(dxd, size32) ((dxd)->size = cpu_to_le32(size32)) 119 #define sizeDXD(dxd) le32_to_cpu((dxd)->size) 120 121 /* 122 * directory entry argument 123 */ 124 struct component_name { 125 int namlen; 126 wchar_t *name; 127 }; 128 129 130 /* 131 * DASD limit information - stored in directory inode 132 */ 133 struct dasd { 134 u8 thresh; /* Alert Threshold (in percent) */ 135 u8 delta; /* Alert Threshold delta (in percent) */ 136 u8 rsrvd1; 137 u8 limit_hi; /* DASD limit (in logical blocks) */ 138 __le32 limit_lo; /* DASD limit (in logical blocks) */ 139 u8 rsrvd2[3]; 140 u8 used_hi; /* DASD usage (in logical blocks) */ 141 __le32 used_lo; /* DASD usage (in logical blocks) */ 142 }; 143 144 #define DASDLIMIT(dasdp) \ 145 (((u64)((dasdp)->limit_hi) << 32) + __le32_to_cpu((dasdp)->limit_lo)) 146 #define setDASDLIMIT(dasdp, limit)\ 147 {\ 148 (dasdp)->limit_hi = ((u64)limit) >> 32;\ 149 (dasdp)->limit_lo = __cpu_to_le32(limit);\ 150 } 151 #define DASDUSED(dasdp) \ 152 (((u64)((dasdp)->used_hi) << 32) + __le32_to_cpu((dasdp)->used_lo)) 153 #define setDASDUSED(dasdp, used)\ 154 {\ 155 (dasdp)->used_hi = ((u64)used) >> 32;\ 156 (dasdp)->used_lo = __cpu_to_le32(used);\ 157 } 158 159 #endif /* !_H_JFS_TYPES */ 160