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