/* *  BSD Process Accounting for Linux - Definitions * *  Author: Marco van Wieringen (mvw@planets.elm.net) * *  This header file contains the definitions needed to implement *  BSD-style process accounting. The kernel accounting code and all *  user-level programs that try to do something useful with the *  process accounting log must include this file. * *  Copyright (C) 1995 - 1997 Marco van Wieringen - ELM Consultancy B.V. * */#ifndef _LINUX_ACCT_H#define _LINUX_ACCT_H #include <uapi/linux/acct.h>   #ifdef CONFIG_BSD_PROCESS_ACCTstruct vfsmount;struct super_block;struct pacct_struct;struct pid_namespace;extern int acct_parm[]; /* for sysctl */extern void acct_auto_close_mnt(struct vfsmount *m);extern void acct_auto_close(struct super_block *sb);extern void acct_collect(long exitcode, int group_dead);extern void acct_process(void);extern void acct_exit_ns(struct pid_namespace *);#else#define acct_auto_close_mnt(x)	do { } while (0)#define acct_auto_close(x)	do { } while (0)#define acct_collect(x,y)	do { } while (0)#define acct_process()		do { } while (0)#define acct_exit_ns(ns)	do { } while (0)#endif /* * ACCT_VERSION numbers as yet defined: * 0: old format (until 2.6.7) with 16 bit uid/gid * 1: extended variant (binary compatible on M68K) * 2: extended variant (binary compatible on everything except M68K) * 3: new binary incompatible format (64 bytes) * 4: new binary incompatible format (128 bytes) * 5: new binary incompatible format (128 bytes, second half) * */ #undef ACCT_VERSION#undef AHZ #ifdef CONFIG_BSD_PROCESS_ACCT_V3#define ACCT_VERSION	3#define AHZ		100typedef struct acct_v3 acct_t;#else#ifdef CONFIG_M68K#define ACCT_VERSION	1#else#define ACCT_VERSION	2#endif#define AHZ		(USER_HZ)typedef struct acct acct_t;#endif #include <linux/jiffies.h>/* * Yet another set of HZ to *HZ helper functions. * See <linux/jiffies.h> for the original. */ static inline u32 jiffies_to_AHZ(unsigned long x){#if (TICK_NSEC % (NSEC_PER_SEC / AHZ)) == 0# if HZ < AHZ	return x * (AHZ / HZ);# else	return x / (HZ / AHZ);# endif#else        u64 tmp = (u64)x * TICK_NSEC;        do_div(tmp, (NSEC_PER_SEC / AHZ));        return (long)tmp;#endif} static inline u64 nsec_to_AHZ(u64 x){#if (NSEC_PER_SEC % AHZ) == 0	do_div(x, (NSEC_PER_SEC / AHZ));#elif (AHZ % 512) == 0	x *= AHZ/512;	do_div(x, (NSEC_PER_SEC / 512));#else	/*         * max relative error 5.7e-8 (1.8s per year) for AHZ <= 1024,         * overflow after 64.99 years.         * exact for AHZ=60, 72, 90, 120, 144, 180, 300, 600, 900, ...         */	x *= 9;	do_div(x, (unsigned long)((9ull * NSEC_PER_SEC + (AHZ/2))	                          / AHZ));#endif	return x;} #endif	/* _LINUX_ACCT_H */