1 /* SPDX-License-Identifier: GPL-2.0 */ <<
2 /* 1 /*
3 * BSD Process Accounting for Linux - Definit 2 * BSD Process Accounting for Linux - Definitions
4 * 3 *
5 * Author: Marco van Wieringen (mvw@planets.e 4 * Author: Marco van Wieringen (mvw@planets.elm.net)
6 * 5 *
7 * This header file contains the definitions 6 * This header file contains the definitions needed to implement
8 * BSD-style process accounting. The kernel a 7 * BSD-style process accounting. The kernel accounting code and all
9 * user-level programs that try to do somethi 8 * user-level programs that try to do something useful with the
10 * process accounting log must include this f 9 * process accounting log must include this file.
11 * 10 *
12 * Copyright (C) 1995 - 1997 Marco van Wierin 11 * Copyright (C) 1995 - 1997 Marco van Wieringen - ELM Consultancy B.V.
13 * 12 *
14 */ 13 */
15 #ifndef _LINUX_ACCT_H 14 #ifndef _LINUX_ACCT_H
16 #define _LINUX_ACCT_H 15 #define _LINUX_ACCT_H
17 16
18 #include <uapi/linux/acct.h> 17 #include <uapi/linux/acct.h>
19 18
20 19
21 20
22 #ifdef CONFIG_BSD_PROCESS_ACCT 21 #ifdef CONFIG_BSD_PROCESS_ACCT
>> 22 struct vfsmount;
>> 23 struct super_block;
>> 24 struct pacct_struct;
23 struct pid_namespace; 25 struct pid_namespace;
>> 26 extern int acct_parm[]; /* for sysctl */
24 extern void acct_collect(long exitcode, int gr 27 extern void acct_collect(long exitcode, int group_dead);
25 extern void acct_process(void); 28 extern void acct_process(void);
26 extern void acct_exit_ns(struct pid_namespace 29 extern void acct_exit_ns(struct pid_namespace *);
27 #else 30 #else
28 #define acct_collect(x,y) do { } while ( 31 #define acct_collect(x,y) do { } while (0)
29 #define acct_process() do { } while ( 32 #define acct_process() do { } while (0)
30 #define acct_exit_ns(ns) do { } while ( 33 #define acct_exit_ns(ns) do { } while (0)
31 #endif 34 #endif
32 35
33 /* 36 /*
34 * ACCT_VERSION numbers as yet defined: 37 * ACCT_VERSION numbers as yet defined:
35 * 0: old format (until 2.6.7) with 16 bit uid 38 * 0: old format (until 2.6.7) with 16 bit uid/gid
36 * 1: extended variant (binary compatible on M 39 * 1: extended variant (binary compatible on M68K)
37 * 2: extended variant (binary compatible on e 40 * 2: extended variant (binary compatible on everything except M68K)
38 * 3: new binary incompatible format (64 bytes 41 * 3: new binary incompatible format (64 bytes)
39 * 4: new binary incompatible format (128 byte 42 * 4: new binary incompatible format (128 bytes)
40 * 5: new binary incompatible format (128 byte 43 * 5: new binary incompatible format (128 bytes, second half)
41 * 44 *
42 */ 45 */
43 46
44 #undef ACCT_VERSION 47 #undef ACCT_VERSION
45 #undef AHZ 48 #undef AHZ
46 49
47 #ifdef CONFIG_BSD_PROCESS_ACCT_V3 50 #ifdef CONFIG_BSD_PROCESS_ACCT_V3
48 #define ACCT_VERSION 3 51 #define ACCT_VERSION 3
49 #define AHZ 100 52 #define AHZ 100
50 typedef struct acct_v3 acct_t; 53 typedef struct acct_v3 acct_t;
51 #else 54 #else
52 #ifdef CONFIG_M68K 55 #ifdef CONFIG_M68K
53 #define ACCT_VERSION 1 56 #define ACCT_VERSION 1
54 #else 57 #else
55 #define ACCT_VERSION 2 58 #define ACCT_VERSION 2
56 #endif 59 #endif
57 #define AHZ (USER_HZ) 60 #define AHZ (USER_HZ)
58 typedef struct acct acct_t; 61 typedef struct acct acct_t;
59 #endif 62 #endif
60 63
61 #include <linux/jiffies.h> 64 #include <linux/jiffies.h>
62 /* 65 /*
63 * Yet another set of HZ to *HZ helper functio 66 * Yet another set of HZ to *HZ helper functions.
64 * See <linux/jiffies.h> for the original. 67 * See <linux/jiffies.h> for the original.
65 */ 68 */
66 69
67 static inline u32 jiffies_to_AHZ(unsigned long 70 static inline u32 jiffies_to_AHZ(unsigned long x)
68 { 71 {
69 #if (TICK_NSEC % (NSEC_PER_SEC / AHZ)) == 0 72 #if (TICK_NSEC % (NSEC_PER_SEC / AHZ)) == 0
70 # if HZ < AHZ 73 # if HZ < AHZ
71 return x * (AHZ / HZ); 74 return x * (AHZ / HZ);
72 # else 75 # else
73 return x / (HZ / AHZ); 76 return x / (HZ / AHZ);
74 # endif 77 # endif
75 #else 78 #else
76 u64 tmp = (u64)x * TICK_NSEC; 79 u64 tmp = (u64)x * TICK_NSEC;
77 do_div(tmp, (NSEC_PER_SEC / AHZ)); 80 do_div(tmp, (NSEC_PER_SEC / AHZ));
78 return (long)tmp; 81 return (long)tmp;
79 #endif 82 #endif
80 } 83 }
81 84
82 static inline u64 nsec_to_AHZ(u64 x) 85 static inline u64 nsec_to_AHZ(u64 x)
83 { 86 {
84 #if (NSEC_PER_SEC % AHZ) == 0 87 #if (NSEC_PER_SEC % AHZ) == 0
85 do_div(x, (NSEC_PER_SEC / AHZ)); 88 do_div(x, (NSEC_PER_SEC / AHZ));
86 #elif (AHZ % 512) == 0 89 #elif (AHZ % 512) == 0
87 x *= AHZ/512; 90 x *= AHZ/512;
88 do_div(x, (NSEC_PER_SEC / 512)); 91 do_div(x, (NSEC_PER_SEC / 512));
89 #else 92 #else
90 /* 93 /*
91 * max relative error 5.7e-8 (1.8s per 94 * max relative error 5.7e-8 (1.8s per year) for AHZ <= 1024,
92 * overflow after 64.99 years. 95 * overflow after 64.99 years.
93 * exact for AHZ=60, 72, 90, 120, 144, 96 * exact for AHZ=60, 72, 90, 120, 144, 180, 300, 600, 900, ...
94 */ 97 */
95 x *= 9; 98 x *= 9;
96 do_div(x, (unsigned long)((9ull * NSEC 99 do_div(x, (unsigned long)((9ull * NSEC_PER_SEC + (AHZ/2))
97 / AHZ)); 100 / AHZ));
98 #endif 101 #endif
99 return x; 102 return x;
100 } 103 }
101 104
102 #endif /* _LINUX_ACCT_H */ 105 #endif /* _LINUX_ACCT_H */
103 106
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