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/* * 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_ACCT struct 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 100 typedef 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 */