projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 1da177e4 LT |
2 | /* |
| 3 | * BSD Process Accounting for Linux - Definitions | |
| 4 | * | |
| 5 | * Author: Marco van Wieringen (mvw@planets.elm.net) | |
| 6 | * | |
| 7 | * This header file contains the definitions needed to implement | |
| 8 | * BSD-style process accounting. The kernel accounting code and all | |
| 9 | * user-level programs that try to do something useful with the | |
| 10 | * process accounting log must include this file. | |
| 11 | * | |
| 12 | * Copyright (C) 1995 - 1997 Marco van Wieringen - ELM Consultancy B.V. | |
| 13 | * | |
| 14 | */ | |
| 1da177e4 LT |
15 | #ifndef _LINUX_ACCT_H |
| 16 | #define _LINUX_ACCT_H | |
| 17 | ||
| 607ca46e | 18 | #include <uapi/linux/acct.h> |
| 1da177e4 | 19 | |
| 1da177e4 | 20 | |
| 1da177e4 LT |
21 | |
| 22 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
| 0b6b030f | 23 | struct pid_namespace; |
| c55b7c3e | 24 | extern int acct_parm[]; /* for sysctl */ |
| f6ec29a4 KK |
25 | extern void acct_collect(long exitcode, int group_dead); |
| 26 | extern void acct_process(void); | |
| 0b6b030f | 27 | extern void acct_exit_ns(struct pid_namespace *); |
| 1da177e4 | 28 | #else |
| f6ec29a4 KK |
29 | #define acct_collect(x,y) do { } while (0) |
| 30 | #define acct_process() do { } while (0) | |
| 0b6b030f | 31 | #define acct_exit_ns(ns) do { } while (0) |
| 1da177e4 LT |
32 | #endif |
| 33 | ||
| 34 | /* | |
| 35 | * ACCT_VERSION numbers as yet defined: | |
| 36 | * 0: old format (until 2.6.7) with 16 bit uid/gid | |
| 37 | * 1: extended variant (binary compatible on M68K) | |
| 38 | * 2: extended variant (binary compatible on everything except M68K) | |
| 39 | * 3: new binary incompatible format (64 bytes) | |
| 40 | * 4: new binary incompatible format (128 bytes) | |
| 41 | * 5: new binary incompatible format (128 bytes, second half) | |
| 42 | * | |
| 43 | */ | |
| 44 | ||
| 989e986f DH |
45 | #undef ACCT_VERSION |
| 46 | #undef AHZ | |
| 47 | ||
| 1da177e4 LT |
48 | #ifdef CONFIG_BSD_PROCESS_ACCT_V3 |
| 49 | #define ACCT_VERSION 3 | |
| 50 | #define AHZ 100 | |
| 51 | typedef struct acct_v3 acct_t; | |
| 52 | #else | |
| 53 | #ifdef CONFIG_M68K | |
| 54 | #define ACCT_VERSION 1 | |
| 55 | #else | |
| 56 | #define ACCT_VERSION 2 | |
| 57 | #endif | |
| 58 | #define AHZ (USER_HZ) | |
| 59 | typedef struct acct acct_t; | |
| 60 | #endif | |
| 61 | ||
| a1ff0eaf | 62 | #include <linux/jiffies.h> |
| 1da177e4 LT |
63 | /* |
| 64 | * Yet another set of HZ to *HZ helper functions. | |
| e26148d9 | 65 | * See <linux/jiffies.h> for the original. |
| 1da177e4 LT |
66 | */ |
| 67 | ||
| 68 | static inline u32 jiffies_to_AHZ(unsigned long x) | |
| 69 | { | |
| 70 | #if (TICK_NSEC % (NSEC_PER_SEC / AHZ)) == 0 | |
| 6ffc787a DF |
71 | # if HZ < AHZ |
| 72 | return x * (AHZ / HZ); | |
| 73 | # else | |
| e26148d9 | 74 | return x / (HZ / AHZ); |
| 6ffc787a | 75 | # endif |
| 1da177e4 LT |
76 | #else |
| 77 | u64 tmp = (u64)x * TICK_NSEC; | |
| 78 | do_div(tmp, (NSEC_PER_SEC / AHZ)); | |
| 79 | return (long)tmp; | |
| 80 | #endif | |
| 81 | } | |
| 82 | ||
| 83 | static inline u64 nsec_to_AHZ(u64 x) | |
| 84 | { | |
| 85 | #if (NSEC_PER_SEC % AHZ) == 0 | |
| 86 | do_div(x, (NSEC_PER_SEC / AHZ)); | |
| 87 | #elif (AHZ % 512) == 0 | |
| 88 | x *= AHZ/512; | |
| 89 | do_div(x, (NSEC_PER_SEC / 512)); | |
| 90 | #else | |
| 91 | /* | |
| 92 | * max relative error 5.7e-8 (1.8s per year) for AHZ <= 1024, | |
| 93 | * overflow after 64.99 years. | |
| 94 | * exact for AHZ=60, 72, 90, 120, 144, 180, 300, 600, 900, ... | |
| 95 | */ | |
| 96 | x *= 9; | |
| 97 | do_div(x, (unsigned long)((9ull * NSEC_PER_SEC + (AHZ/2)) | |
| 98 | / AHZ)); | |
| 99 | #endif | |
| 100 | return x; | |
| 101 | } | |
| 102 | ||
| 1da177e4 | 103 | #endif /* _LINUX_ACCT_H */ |