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#ifndef _LINUX_ACCT_H 15#define _LINUX_ACCT_H 16 17#include <uapi/linux/acct.h> 18 19 20 21#ifdef CONFIG_BSD_PROCESS_ACCT 22struct vfsmount; 23struct super_block; 24struct pacct_struct; 25struct pid_namespace; 26extern int acct_parm[]; /* for sysctl */ 27extern void acct_collect(long exitcode, int group_dead); 28extern void acct_process(void); 29extern void acct_exit_ns(struct pid_namespace *); 30#else 31#define acct_collect(x,y) do { } while (0) 32#define acct_process() do { } while (0) 33#define acct_exit_ns(ns) do { } while (0) 34#endif 35 36/* 37 * ACCT_VERSION numbers as yet defined: 38 * 0: old format (until 2.6.7) with 16 bit uid/gid 39 * 1: extended variant (binary compatible on M68K) 40 * 2: extended variant (binary compatible on everything except M68K) 41 * 3: new binary incompatible format (64 bytes) 42 * 4: new binary incompatible format (128 bytes) 43 * 5: new binary incompatible format (128 bytes, second half) 44 * 45 */ 46 47#undef ACCT_VERSION 48#undef AHZ 49 50#ifdef CONFIG_BSD_PROCESS_ACCT_V3 51#define ACCT_VERSION 3 52#define AHZ 100 53typedef struct acct_v3 acct_t; 54#else 55#ifdef CONFIG_M68K 56#define ACCT_VERSION 1 57#else 58#define ACCT_VERSION 2 59#endif 60#define AHZ (USER_HZ) 61typedef struct acct acct_t; 62#endif 63 64#include <linux/jiffies.h> 65/* 66 * Yet another set of HZ to *HZ helper functions. 67 * See <linux/jiffies.h> for the original. 68 */ 69 70static inline u32 jiffies_to_AHZ(unsigned long x) 71{ 72#if (TICK_NSEC % (NSEC_PER_SEC / AHZ)) == 0 73# if HZ < AHZ 74 return x * (AHZ / HZ); 75# else 76 return x / (HZ / AHZ); 77# endif 78#else 79 u64 tmp = (u64)x * TICK_NSEC; 80 do_div(tmp, (NSEC_PER_SEC / AHZ)); 81 return (long)tmp; 82#endif 83} 84 85static inline u64 nsec_to_AHZ(u64 x) 86{ 87#if (NSEC_PER_SEC % AHZ) == 0 88 do_div(x, (NSEC_PER_SEC / AHZ)); 89#elif (AHZ % 512) == 0 90 x *= AHZ/512; 91 do_div(x, (NSEC_PER_SEC / 512)); 92#else 93 /* 94 * max relative error 5.7e-8 (1.8s per year) for AHZ <= 1024, 95 * overflow after 64.99 years. 96 * exact for AHZ=60, 72, 90, 120, 144, 180, 300, 600, 900, ... 97 */ 98 x *= 9; 99 do_div(x, (unsigned long)((9ull * NSEC_PER_SEC + (AHZ/2)) 100 / AHZ)); 101#endif 102 return x; 103} 104 105#endif /* _LINUX_ACCT_H */ 106