1 /* SPDX-License-Identifier: GPL-2.0 */ 1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* 2 /*
3 * BSD Process Accounting for Linux - Definit 3 * BSD Process Accounting for Linux - Definitions
4 * 4 *
5 * Author: Marco van Wieringen (mvw@planets.e 5 * Author: Marco van Wieringen (mvw@planets.elm.net)
6 * 6 *
7 * This header file contains the definitions 7 * This header file contains the definitions needed to implement
8 * BSD-style process accounting. The kernel a 8 * BSD-style process accounting. The kernel accounting code and all
9 * user-level programs that try to do somethi 9 * user-level programs that try to do something useful with the
10 * process accounting log must include this f 10 * process accounting log must include this file.
11 * 11 *
12 * Copyright (C) 1995 - 1997 Marco van Wierin 12 * Copyright (C) 1995 - 1997 Marco van Wieringen - ELM Consultancy B.V.
13 * 13 *
14 */ 14 */
15 #ifndef _LINUX_ACCT_H 15 #ifndef _LINUX_ACCT_H
16 #define _LINUX_ACCT_H 16 #define _LINUX_ACCT_H
17 17
18 #include <uapi/linux/acct.h> 18 #include <uapi/linux/acct.h>
19 19
20 20
21 21
22 #ifdef CONFIG_BSD_PROCESS_ACCT 22 #ifdef CONFIG_BSD_PROCESS_ACCT
23 struct pid_namespace; 23 struct pid_namespace;
>> 24 extern int acct_parm[]; /* for sysctl */
24 extern void acct_collect(long exitcode, int gr 25 extern void acct_collect(long exitcode, int group_dead);
25 extern void acct_process(void); 26 extern void acct_process(void);
26 extern void acct_exit_ns(struct pid_namespace 27 extern void acct_exit_ns(struct pid_namespace *);
27 #else 28 #else
28 #define acct_collect(x,y) do { } while ( 29 #define acct_collect(x,y) do { } while (0)
29 #define acct_process() do { } while ( 30 #define acct_process() do { } while (0)
30 #define acct_exit_ns(ns) do { } while ( 31 #define acct_exit_ns(ns) do { } while (0)
31 #endif 32 #endif
32 33
33 /* 34 /*
34 * ACCT_VERSION numbers as yet defined: 35 * ACCT_VERSION numbers as yet defined:
35 * 0: old format (until 2.6.7) with 16 bit uid 36 * 0: old format (until 2.6.7) with 16 bit uid/gid
36 * 1: extended variant (binary compatible on M 37 * 1: extended variant (binary compatible on M68K)
37 * 2: extended variant (binary compatible on e 38 * 2: extended variant (binary compatible on everything except M68K)
38 * 3: new binary incompatible format (64 bytes 39 * 3: new binary incompatible format (64 bytes)
39 * 4: new binary incompatible format (128 byte 40 * 4: new binary incompatible format (128 bytes)
40 * 5: new binary incompatible format (128 byte 41 * 5: new binary incompatible format (128 bytes, second half)
41 * 42 *
42 */ 43 */
43 44
44 #undef ACCT_VERSION 45 #undef ACCT_VERSION
45 #undef AHZ 46 #undef AHZ
46 47
47 #ifdef CONFIG_BSD_PROCESS_ACCT_V3 48 #ifdef CONFIG_BSD_PROCESS_ACCT_V3
48 #define ACCT_VERSION 3 49 #define ACCT_VERSION 3
49 #define AHZ 100 50 #define AHZ 100
50 typedef struct acct_v3 acct_t; 51 typedef struct acct_v3 acct_t;
51 #else 52 #else
52 #ifdef CONFIG_M68K 53 #ifdef CONFIG_M68K
53 #define ACCT_VERSION 1 54 #define ACCT_VERSION 1
54 #else 55 #else
55 #define ACCT_VERSION 2 56 #define ACCT_VERSION 2
56 #endif 57 #endif
57 #define AHZ (USER_HZ) 58 #define AHZ (USER_HZ)
58 typedef struct acct acct_t; 59 typedef struct acct acct_t;
59 #endif 60 #endif
60 61
61 #include <linux/jiffies.h> 62 #include <linux/jiffies.h>
62 /* 63 /*
63 * Yet another set of HZ to *HZ helper functio 64 * Yet another set of HZ to *HZ helper functions.
64 * See <linux/jiffies.h> for the original. 65 * See <linux/jiffies.h> for the original.
65 */ 66 */
66 67
67 static inline u32 jiffies_to_AHZ(unsigned long 68 static inline u32 jiffies_to_AHZ(unsigned long x)
68 { 69 {
69 #if (TICK_NSEC % (NSEC_PER_SEC / AHZ)) == 0 70 #if (TICK_NSEC % (NSEC_PER_SEC / AHZ)) == 0
70 # if HZ < AHZ 71 # if HZ < AHZ
71 return x * (AHZ / HZ); 72 return x * (AHZ / HZ);
72 # else 73 # else
73 return x / (HZ / AHZ); 74 return x / (HZ / AHZ);
74 # endif 75 # endif
75 #else 76 #else
76 u64 tmp = (u64)x * TICK_NSEC; 77 u64 tmp = (u64)x * TICK_NSEC;
77 do_div(tmp, (NSEC_PER_SEC / AHZ)); 78 do_div(tmp, (NSEC_PER_SEC / AHZ));
78 return (long)tmp; 79 return (long)tmp;
79 #endif 80 #endif
80 } 81 }
81 82
82 static inline u64 nsec_to_AHZ(u64 x) 83 static inline u64 nsec_to_AHZ(u64 x)
83 { 84 {
84 #if (NSEC_PER_SEC % AHZ) == 0 85 #if (NSEC_PER_SEC % AHZ) == 0
85 do_div(x, (NSEC_PER_SEC / AHZ)); 86 do_div(x, (NSEC_PER_SEC / AHZ));
86 #elif (AHZ % 512) == 0 87 #elif (AHZ % 512) == 0
87 x *= AHZ/512; 88 x *= AHZ/512;
88 do_div(x, (NSEC_PER_SEC / 512)); 89 do_div(x, (NSEC_PER_SEC / 512));
89 #else 90 #else
90 /* 91 /*
91 * max relative error 5.7e-8 (1.8s per 92 * max relative error 5.7e-8 (1.8s per year) for AHZ <= 1024,
92 * overflow after 64.99 years. 93 * overflow after 64.99 years.
93 * exact for AHZ=60, 72, 90, 120, 144, 94 * exact for AHZ=60, 72, 90, 120, 144, 180, 300, 600, 900, ...
94 */ 95 */
95 x *= 9; 96 x *= 9;
96 do_div(x, (unsigned long)((9ull * NSEC 97 do_div(x, (unsigned long)((9ull * NSEC_PER_SEC + (AHZ/2))
97 / AHZ)); 98 / AHZ));
98 #endif 99 #endif
99 return x; 100 return x;
100 } 101 }
101 102
102 #endif /* _LINUX_ACCT_H */ 103 #endif /* _LINUX_ACCT_H */
103 104
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