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 20#include <asm/param.h> 21#include <asm/byteorder.h> 22 23/* 24 * comp_t is a 16-bit "floating" point number with a 3-bit base 8 25 * exponent and a 13-bit fraction. 26 * comp2_t is 24-bit with 5-bit base 2 exponent and 20 bit fraction 27 * (leading 1 not stored). 28 * See linux/kernel/acct.c for the specific encoding systems used. 29 */ 30 31typedef __u16 comp_t; 32typedef __u32 comp2_t; 33 34/* 35 * accounting file record 36 * 37 * This structure contains all of the information written out to the 38 * process accounting file whenever a process exits. 39 */ 40 41#define ACCT_COMM 16 42 43struct acct 44{ 45 char ac_flag; /* Flags */ 46 char ac_version; /* Always set to ACCT_VERSION */ 47 /* for binary compatibility back until 2.0 */ 48 __u16 ac_uid16; /* LSB of Real User ID */ 49 __u16 ac_gid16; /* LSB of Real Group ID */ 50 __u16 ac_tty; /* Control Terminal */ 51 __u32 ac_btime; /* Process Creation Time */ 52 comp_t ac_utime; /* User Time */ 53 comp_t ac_stime; /* System Time */ 54 comp_t ac_etime; /* Elapsed Time */ 55 comp_t ac_mem; /* Average Memory Usage */ 56 comp_t ac_io; /* Chars Transferred */ 57 comp_t ac_rw; /* Blocks Read or Written */ 58 comp_t ac_minflt; /* Minor Pagefaults */ 59 comp_t ac_majflt; /* Major Pagefaults */ 60 comp_t ac_swaps; /* Number of Swaps */ 61/* m68k had no padding here. */ 62#if !defined(CONFIG_M68K) || !defined(__KERNEL__) 63 __u16 ac_ahz; /* AHZ */ 64#endif 65 __u32 ac_exitcode; /* Exitcode */ 66 char ac_comm[ACCT_COMM + 1]; /* Command Name */ 67 __u8 ac_etime_hi; /* Elapsed Time MSB */ 68 __u16 ac_etime_lo; /* Elapsed Time LSB */ 69 __u32 ac_uid; /* Real User ID */ 70 __u32 ac_gid; /* Real Group ID */ 71}; 72 73struct acct_v3 74{ 75 char ac_flag; /* Flags */ 76 char ac_version; /* Always set to ACCT_VERSION */ 77 __u16 ac_tty; /* Control Terminal */ 78 __u32 ac_exitcode; /* Exitcode */ 79 __u32 ac_uid; /* Real User ID */ 80 __u32 ac_gid; /* Real Group ID */ 81 __u32 ac_pid; /* Process ID */ 82 __u32 ac_ppid; /* Parent Process ID */ 83 __u32 ac_btime; /* Process Creation Time */ 84#ifdef __KERNEL__ 85 __u32 ac_etime; /* Elapsed Time */ 86#else 87 float ac_etime; /* Elapsed Time */ 88#endif 89 comp_t ac_utime; /* User Time */ 90 comp_t ac_stime; /* System Time */ 91 comp_t ac_mem; /* Average Memory Usage */ 92 comp_t ac_io; /* Chars Transferred */ 93 comp_t ac_rw; /* Blocks Read or Written */ 94 comp_t ac_minflt; /* Minor Pagefaults */ 95 comp_t ac_majflt; /* Major Pagefaults */ 96 comp_t ac_swaps; /* Number of Swaps */ 97 char ac_comm[ACCT_COMM]; /* Command Name */ 98}; 99 100/* 101 * accounting flags 102 */ 103 /* bit set when the process ... */ 104#define AFORK 0x01 /* ... executed fork, but did not exec */ 105#define ASU 0x02 /* ... used super-user privileges */ 106#define ACOMPAT 0x04 /* ... used compatibility mode (VAX only not used) */ 107#define ACORE 0x08 /* ... dumped core */ 108#define AXSIG 0x10 /* ... was killed by a signal */ 109 110#ifdef __BIG_ENDIAN 111#define ACCT_BYTEORDER 0x80 /* accounting file is big endian */ 112#else 113#define ACCT_BYTEORDER 0x00 /* accounting file is little endian */ 114#endif 115 116#ifdef __KERNEL__ 117 118 119#ifdef CONFIG_BSD_PROCESS_ACCT 120struct vfsmount; 121struct super_block; 122struct pacct_struct; 123extern void acct_auto_close_mnt(struct vfsmount *m); 124extern void acct_auto_close(struct super_block *sb); 125extern void acct_init_pacct(struct pacct_struct *pacct); 126extern void acct_collect(long exitcode, int group_dead); 127extern void acct_process(void); 128#else 129#define acct_auto_close_mnt(x) do { } while (0) 130#define acct_auto_close(x) do { } while (0) 131#define acct_init_pacct(x) do { } while (0) 132#define acct_collect(x,y) do { } while (0) 133#define acct_process() do { } while (0) 134#endif 135 136/* 137 * ACCT_VERSION numbers as yet defined: 138 * 0: old format (until 2.6.7) with 16 bit uid/gid 139 * 1: extended variant (binary compatible on M68K) 140 * 2: extended variant (binary compatible on everything except M68K) 141 * 3: new binary incompatible format (64 bytes) 142 * 4: new binary incompatible format (128 bytes) 143 * 5: new binary incompatible format (128 bytes, second half) 144 * 145 */ 146 147#ifdef CONFIG_BSD_PROCESS_ACCT_V3 148#define ACCT_VERSION 3 149#define AHZ 100 150typedef struct acct_v3 acct_t; 151#else 152#ifdef CONFIG_M68K 153#define ACCT_VERSION 1 154#else 155#define ACCT_VERSION 2 156#endif 157#define AHZ (USER_HZ) 158typedef struct acct acct_t; 159#endif 160 161#else 162#define ACCT_VERSION 2 163#define AHZ (HZ) 164#endif /* __KERNEL */ 165 166#ifdef __KERNEL__ 167#include <linux/jiffies.h> 168/* 169 * Yet another set of HZ to *HZ helper functions. 170 * See <linux/jiffies.h> for the original. 171 */ 172 173static inline u32 jiffies_to_AHZ(unsigned long x) 174{ 175#if (TICK_NSEC % (NSEC_PER_SEC / AHZ)) == 0 176# if HZ < AHZ 177 return x * (AHZ / HZ); 178# else 179 return x / (HZ / AHZ); 180# endif 181#else 182 u64 tmp = (u64)x * TICK_NSEC; 183 do_div(tmp, (NSEC_PER_SEC / AHZ)); 184 return (long)tmp; 185#endif 186} 187 188static inline u64 nsec_to_AHZ(u64 x) 189{ 190#if (NSEC_PER_SEC % AHZ) == 0 191 do_div(x, (NSEC_PER_SEC / AHZ)); 192#elif (AHZ % 512) == 0 193 x *= AHZ/512; 194 do_div(x, (NSEC_PER_SEC / 512)); 195#else 196 /* 197 * max relative error 5.7e-8 (1.8s per year) for AHZ <= 1024, 198 * overflow after 64.99 years. 199 * exact for AHZ=60, 72, 90, 120, 144, 180, 300, 600, 900, ... 200 */ 201 x *= 9; 202 do_div(x, (unsigned long)((9ull * NSEC_PER_SEC + (AHZ/2)) 203 / AHZ)); 204#endif 205 return x; 206} 207 208#endif /* __KERNEL */ 209 210#endif /* _LINUX_ACCT_H */ 211