1/* 2 * BSD Process Accounting for Linux - Definitions 3 * 4 * Author: Marco van Wieringen (mvw@planets.elm.net) 5 * 6 * This header file contains the definitions needed to implement 7 * BSD-style process accounting. The kernel accounting code and all 8 * user-level programs that try to do something useful with the 9 * process accounting log must include this file. 10 * 11 * Copyright (C) 1995 - 1997 Marco van Wieringen - ELM Consultancy B.V. 12 * 13 */ 14 15#ifndef _LINUX_ACCT_H 16#define _LINUX_ACCT_H 17 18#include <linux/types.h> 19#include <asm/param.h> 20#include <asm/byteorder.h> 21 22/* 23 * comp_t is a 16-bit "floating" point number with a 3-bit base 8 24 * exponent and a 13-bit fraction. 25 * comp2_t is 24-bit with 5-bit base 2 exponent and 20 bit fraction 26 * (leading 1 not stored). 27 * See linux/kernel/acct.c for the specific encoding systems used. 28 */ 29 30typedef __u16 comp_t; 31typedef __u32 comp2_t; 32 33/* 34 * accounting file record 35 * 36 * This structure contains all of the information written out to the 37 * process accounting file whenever a process exits. 38 */ 39 40#define ACCT_COMM 16 41 42struct acct 43{ 44 char ac_flag; /* Flags */ 45 char ac_version; /* Always set to ACCT_VERSION */ 46 /* for binary compatibility back until 2.0 */ 47 __u16 ac_uid16; /* LSB of Real User ID */ 48 __u16 ac_gid16; /* LSB of Real Group ID */ 49 __u16 ac_tty; /* Control Terminal */ 50 __u32 ac_btime; /* Process Creation Time */ 51 comp_t ac_utime; /* User Time */ 52 comp_t ac_stime; /* System Time */ 53 comp_t ac_etime; /* Elapsed Time */ 54 comp_t ac_mem; /* Average Memory Usage */ 55 comp_t ac_io; /* Chars Transferred */ 56 comp_t ac_rw; /* Blocks Read or Written */ 57 comp_t ac_minflt; /* Minor Pagefaults */ 58 comp_t ac_majflt; /* Major Pagefaults */ 59 comp_t ac_swaps; /* Number of Swaps */ 60/* m68k had no padding here. */ 61#if !defined(CONFIG_M68K) || !defined(__KERNEL__) 62 __u16 ac_ahz; /* AHZ */ 63#endif 64 __u32 ac_exitcode; /* Exitcode */ 65 char ac_comm[ACCT_COMM + 1]; /* Command Name */ 66 __u8 ac_etime_hi; /* Elapsed Time MSB */ 67 __u16 ac_etime_lo; /* Elapsed Time LSB */ 68 __u32 ac_uid; /* Real User ID */ 69 __u32 ac_gid; /* Real Group ID */ 70}; 71 72struct acct_v3 73{ 74 char ac_flag; /* Flags */ 75 char ac_version; /* Always set to ACCT_VERSION */ 76 __u16 ac_tty; /* Control Terminal */ 77 __u32 ac_exitcode; /* Exitcode */ 78 __u32 ac_uid; /* Real User ID */ 79 __u32 ac_gid; /* Real Group ID */ 80 __u32 ac_pid; /* Process ID */ 81 __u32 ac_ppid; /* Parent Process ID */ 82 __u32 ac_btime; /* Process Creation Time */ 83#ifdef __KERNEL__ 84 __u32 ac_etime; /* Elapsed Time */ 85#else 86 float ac_etime; /* Elapsed Time */ 87#endif 88 comp_t ac_utime; /* User Time */ 89 comp_t ac_stime; /* System Time */ 90 comp_t ac_mem; /* Average Memory Usage */ 91 comp_t ac_io; /* Chars Transferred */ 92 comp_t ac_rw; /* Blocks Read or Written */ 93 comp_t ac_minflt; /* Minor Pagefaults */ 94 comp_t ac_majflt; /* Major Pagefaults */ 95 comp_t ac_swaps; /* Number of Swaps */ 96 char ac_comm[ACCT_COMM]; /* Command Name */ 97}; 98 99/* 100 * accounting flags 101 */ 102 /* bit set when the process ... */ 103#define AFORK 0x01 /* ... executed fork, but did not exec */ 104#define ASU 0x02 /* ... used super-user privileges */ 105#define ACOMPAT 0x04 /* ... used compatibility mode (VAX only not used) */ 106#define ACORE 0x08 /* ... dumped core */ 107#define AXSIG 0x10 /* ... was killed by a signal */ 108 109#ifdef __BIG_ENDIAN 110#define ACCT_BYTEORDER 0x80 /* accounting file is big endian */ 111#else 112#define ACCT_BYTEORDER 0x00 /* accounting file is little endian */ 113#endif 114 115#ifdef __KERNEL__ 116 117#include <linux/config.h> 118 119#ifdef CONFIG_BSD_PROCESS_ACCT 120struct super_block; 121extern void acct_auto_close(struct super_block *sb); 122extern void acct_process(long exitcode); 123#else 124#define acct_auto_close(x) do { } while (0) 125#define acct_process(x) do { } while (0) 126#endif 127 128/* 129 * ACCT_VERSION numbers as yet defined: 130 * 0: old format (until 2.6.7) with 16 bit uid/gid 131 * 1: extended variant (binary compatible on M68K) 132 * 2: extended variant (binary compatible on everything except M68K) 133 * 3: new binary incompatible format (64 bytes) 134 * 4: new binary incompatible format (128 bytes) 135 * 5: new binary incompatible format (128 bytes, second half) 136 * 137 */ 138 139#ifdef CONFIG_BSD_PROCESS_ACCT_V3 140#define ACCT_VERSION 3 141#define AHZ 100 142typedef struct acct_v3 acct_t; 143#else 144#ifdef CONFIG_M68K 145#define ACCT_VERSION 1 146#else 147#define ACCT_VERSION 2 148#endif 149#define AHZ (USER_HZ) 150typedef struct acct acct_t; 151#endif 152 153#else 154#define ACCT_VERSION 2 155#define AHZ (HZ) 156#endif /* __KERNEL */ 157 158#ifdef __KERNEL__ 159/* 160 * Yet another set of HZ to *HZ helper functions. 161 * See <linux/times.h> for the original. 162 */ 163 164static inline u32 jiffies_to_AHZ(unsigned long x) 165{ 166#if (TICK_NSEC % (NSEC_PER_SEC / AHZ)) == 0 167 return x / (HZ / USER_HZ); 168#else 169 u64 tmp = (u64)x * TICK_NSEC; 170 do_div(tmp, (NSEC_PER_SEC / AHZ)); 171 return (long)tmp; 172#endif 173} 174 175static inline u64 nsec_to_AHZ(u64 x) 176{ 177#if (NSEC_PER_SEC % AHZ) == 0 178 do_div(x, (NSEC_PER_SEC / AHZ)); 179#elif (AHZ % 512) == 0 180 x *= AHZ/512; 181 do_div(x, (NSEC_PER_SEC / 512)); 182#else 183 /* 184 * max relative error 5.7e-8 (1.8s per year) for AHZ <= 1024, 185 * overflow after 64.99 years. 186 * exact for AHZ=60, 72, 90, 120, 144, 180, 300, 600, 900, ... 187 */ 188 x *= 9; 189 do_div(x, (unsigned long)((9ull * NSEC_PER_SEC + (AHZ/2)) 190 / AHZ)); 191#endif 192 return x; 193} 194 195#endif /* __KERNEL */ 196 197#endif /* _LINUX_ACCT_H */ 198