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_auto_close_mnt(struct vfsmount *m); 28 extern void acct_auto_close(struct super_block *sb); 29 extern void acct_collect(long exitcode, int group_dead); 30 extern void acct_process(void); 31 extern void acct_exit_ns(struct pid_namespace *); 32 #else 33 #define acct_auto_close_mnt(x) do { } while (0) 34 #define acct_auto_close(x) do { } while (0) 35 #define acct_collect(x,y) do { } while (0) 36 #define acct_process() do { } while (0) 37 #define acct_exit_ns(ns) do { } while (0) 38 #endif 39 40 /* 41 * ACCT_VERSION numbers as yet defined: 42 * 0: old format (until 2.6.7) with 16 bit uid/gid 43 * 1: extended variant (binary compatible on M68K) 44 * 2: extended variant (binary compatible on everything except M68K) 45 * 3: new binary incompatible format (64 bytes) 46 * 4: new binary incompatible format (128 bytes) 47 * 5: new binary incompatible format (128 bytes, second half) 48 * 49 */ 50 51 #undef ACCT_VERSION 52 #undef AHZ 53 54 #ifdef CONFIG_BSD_PROCESS_ACCT_V3 55 #define ACCT_VERSION 3 56 #define AHZ 100 57 typedef struct acct_v3 acct_t; 58 #else 59 #ifdef CONFIG_M68K 60 #define ACCT_VERSION 1 61 #else 62 #define ACCT_VERSION 2 63 #endif 64 #define AHZ (USER_HZ) 65 typedef struct acct acct_t; 66 #endif 67 68 #include <linux/jiffies.h> 69 /* 70 * Yet another set of HZ to *HZ helper functions. 71 * See <linux/jiffies.h> for the original. 72 */ 73 74 static inline u32 jiffies_to_AHZ(unsigned long x) 75 { 76 #if (TICK_NSEC % (NSEC_PER_SEC / AHZ)) == 0 77 # if HZ < AHZ 78 return x * (AHZ / HZ); 79 # else 80 return x / (HZ / AHZ); 81 # endif 82 #else 83 u64 tmp = (u64)x * TICK_NSEC; 84 do_div(tmp, (NSEC_PER_SEC / AHZ)); 85 return (long)tmp; 86 #endif 87 } 88 89 static inline u64 nsec_to_AHZ(u64 x) 90 { 91 #if (NSEC_PER_SEC % AHZ) == 0 92 do_div(x, (NSEC_PER_SEC / AHZ)); 93 #elif (AHZ % 512) == 0 94 x *= AHZ/512; 95 do_div(x, (NSEC_PER_SEC / 512)); 96 #else 97 /* 98 * max relative error 5.7e-8 (1.8s per year) for AHZ <= 1024, 99 * overflow after 64.99 years. 100 * exact for AHZ=60, 72, 90, 120, 144, 180, 300, 600, 900, ... 101 */ 102 x *= 9; 103 do_div(x, (unsigned long)((9ull * NSEC_PER_SEC + (AHZ/2)) 104 / AHZ)); 105 #endif 106 return x; 107 } 108 109 #endif /* _LINUX_ACCT_H */ 110