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 __le32 tv_sec; 47 __le32 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 /* 59 * physical xd (pxd) 60 * 61 * The leftmost 24 bits of len_addr are the extent length. 62 * The rightmost 8 bits of len_addr are the most signficant bits of 63 * the extent address 64 */ 65 typedef struct { 66 __le32 len_addr; 67 __le32 addr2; 68 } pxd_t; 69 70 /* xd_t field construction */ 71 72 static inline void PXDlength(pxd_t *pxd, __u32 len) 73 { 74 pxd->len_addr = (pxd->len_addr & cpu_to_le32(~0xffffff)) | 75 cpu_to_le32(len & 0xffffff); 76 } 77 78 static inline void PXDaddress(pxd_t *pxd, __u64 addr) 79 { 80 pxd->len_addr = (pxd->len_addr & cpu_to_le32(0xffffff)) | 81 cpu_to_le32((addr >> 32)<<24); 82 pxd->addr2 = cpu_to_le32(addr & 0xffffffff); 83 } 84 85 /* xd_t field extraction */ 86 static inline __u32 lengthPXD(pxd_t *pxd) 87 { 88 return le32_to_cpu((pxd)->len_addr) & 0xffffff; 89 } 90 91 static inline __u64 addressPXD(pxd_t *pxd) 92 { 93 __u64 n = le32_to_cpu(pxd->len_addr) & ~0xffffff; 94 return (n << 8) + le32_to_cpu(pxd->addr2); 95 } 96 97 #define MAXTREEHEIGHT 8 98 /* pxd list */ 99 struct pxdlist { 100 s16 maxnpxd; 101 s16 npxd; 102 pxd_t pxd[MAXTREEHEIGHT]; 103 }; 104 105 106 /* 107 * data extent descriptor (dxd) 108 */ 109 typedef struct { 110 __u8 flag; /* 1: flags */ 111 __u8 rsrvd[3]; 112 __le32 size; /* 4: size in byte */ 113 pxd_t loc; /* 8: address and length in unit of fsblksize */ 114 } dxd_t; /* - 16 - */ 115 116 /* dxd_t flags */ 117 #define DXD_INDEX 0x80 /* B+-tree index */ 118 #define DXD_INLINE 0x40 /* in-line data extent */ 119 #define DXD_EXTENT 0x20 /* out-of-line single extent */ 120 #define DXD_FILE 0x10 /* out-of-line file (inode) */ 121 #define DXD_CORRUPT 0x08 /* Inconsistency detected */ 122 123 /* dxd_t field construction 124 */ 125 #define DXDlength(dxd, len) PXDlength(&(dxd)->loc, len) 126 #define DXDaddress(dxd, addr) PXDaddress(&(dxd)->loc, addr) 127 #define lengthDXD(dxd) lengthPXD(&(dxd)->loc) 128 #define addressDXD(dxd) addressPXD(&(dxd)->loc) 129 #define DXDsize(dxd, size32) ((dxd)->size = cpu_to_le32(size32)) 130 #define sizeDXD(dxd) le32_to_cpu((dxd)->size) 131 132 /* 133 * directory entry argument 134 */ 135 struct component_name { 136 int namlen; 137 wchar_t *name; 138 }; 139 140 141 /* 142 * DASD limit information - stored in directory inode 143 */ 144 struct dasd { 145 u8 thresh; /* Alert Threshold (in percent) */ 146 u8 delta; /* Alert Threshold delta (in percent) */ 147 u8 rsrvd1; 148 u8 limit_hi; /* DASD limit (in logical blocks) */ 149 __le32 limit_lo; /* DASD limit (in logical blocks) */ 150 u8 rsrvd2[3]; 151 u8 used_hi; /* DASD usage (in logical blocks) */ 152 __le32 used_lo; /* DASD usage (in logical blocks) */ 153 }; 154 155 #define DASDLIMIT(dasdp) \ 156 (((u64)((dasdp)->limit_hi) << 32) + __le32_to_cpu((dasdp)->limit_lo)) 157 #define setDASDLIMIT(dasdp, limit)\ 158 {\ 159 (dasdp)->limit_hi = ((u64)limit) >> 32;\ 160 (dasdp)->limit_lo = __cpu_to_le32(limit);\ 161 } 162 #define DASDUSED(dasdp) \ 163 (((u64)((dasdp)->used_hi) << 32) + __le32_to_cpu((dasdp)->used_lo)) 164 #define setDASDUSED(dasdp, used)\ 165 {\ 166 (dasdp)->used_hi = ((u64)used) >> 32;\ 167 (dasdp)->used_lo = __cpu_to_le32(used);\ 168 } 169 170 #endif /* !_H_JFS_TYPES */ 171