1 /* 2 * BSD Process Accounting for Linux - Definitions 3 * 4 * Author: Marco van Wieringen ([email protected]) 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 22 struct vfsmount; 23 struct super_block; 24 struct pacct_struct; 25 struct pid_namespace; 26 extern int acct_parm[]; /* for sysctl */ 27 extern void acct_collect(long exitcode, int group_dead); 28 extern void acct_process(void); 29 extern 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 53 typedef 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) 61 typedef 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 70 static 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 85 static 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