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1/*
2 * BSD Process Accounting for Linux - Definitions
3 *
4 * Author: Marco van Wieringen (mvw@planets.elm.net)
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
15#ifndef _LINUX_ACCT_H
16#define _LINUX_ACCT_H
17
18#include <linux/types.h>
19
20#include <asm/param.h>
21#include <asm/byteorder.h>
22
23/*
24 * comp_t is a 16-bit "floating" point number with a 3-bit base 8
25 * exponent and a 13-bit fraction.
26 * comp2_t is 24-bit with 5-bit base 2 exponent and 20 bit fraction
27 * (leading 1 not stored).
28 * See linux/kernel/acct.c for the specific encoding systems used.
29 */
30
31typedef __u16 comp_t;
32typedef __u32 comp2_t;
33
34/*
35 * accounting file record
36 *
37 * This structure contains all of the information written out to the
38 * process accounting file whenever a process exits.
39 */
40
41#define ACCT_COMM 16
42
43struct acct
44{
45 char ac_flag; /* Flags */
46 char ac_version; /* Always set to ACCT_VERSION */
47 /* for binary compatibility back until 2.0 */
48 __u16 ac_uid16; /* LSB of Real User ID */
49 __u16 ac_gid16; /* LSB of Real Group ID */
50 __u16 ac_tty; /* Control Terminal */
51 __u32 ac_btime; /* Process Creation Time */
52 comp_t ac_utime; /* User Time */
53 comp_t ac_stime; /* System Time */
54 comp_t ac_etime; /* Elapsed Time */
55 comp_t ac_mem; /* Average Memory Usage */
56 comp_t ac_io; /* Chars Transferred */
57 comp_t ac_rw; /* Blocks Read or Written */
58 comp_t ac_minflt; /* Minor Pagefaults */
59 comp_t ac_majflt; /* Major Pagefaults */
60 comp_t ac_swaps; /* Number of Swaps */
61/* m68k had no padding here. */
62#if !defined(CONFIG_M68K) || !defined(__KERNEL__)
63 __u16 ac_ahz; /* AHZ */
64#endif
65 __u32 ac_exitcode; /* Exitcode */
66 char ac_comm[ACCT_COMM + 1]; /* Command Name */
67 __u8 ac_etime_hi; /* Elapsed Time MSB */
68 __u16 ac_etime_lo; /* Elapsed Time LSB */
69 __u32 ac_uid; /* Real User ID */
70 __u32 ac_gid; /* Real Group ID */
71};
72
73struct acct_v3
74{
75 char ac_flag; /* Flags */
76 char ac_version; /* Always set to ACCT_VERSION */
77 __u16 ac_tty; /* Control Terminal */
78 __u32 ac_exitcode; /* Exitcode */
79 __u32 ac_uid; /* Real User ID */
80 __u32 ac_gid; /* Real Group ID */
81 __u32 ac_pid; /* Process ID */
82 __u32 ac_ppid; /* Parent Process ID */
83 __u32 ac_btime; /* Process Creation Time */
84#ifdef __KERNEL__
85 __u32 ac_etime; /* Elapsed Time */
86#else
87 float ac_etime; /* Elapsed Time */
88#endif
89 comp_t ac_utime; /* User Time */
90 comp_t ac_stime; /* System Time */
91 comp_t ac_mem; /* Average Memory Usage */
92 comp_t ac_io; /* Chars Transferred */
93 comp_t ac_rw; /* Blocks Read or Written */
94 comp_t ac_minflt; /* Minor Pagefaults */
95 comp_t ac_majflt; /* Major Pagefaults */
96 comp_t ac_swaps; /* Number of Swaps */
97 char ac_comm[ACCT_COMM]; /* Command Name */
98};
99
100/*
101 * accounting flags
102 */
103 /* bit set when the process ... */
104#define AFORK 0x01 /* ... executed fork, but did not exec */
105#define ASU 0x02 /* ... used super-user privileges */
106#define ACOMPAT 0x04 /* ... used compatibility mode (VAX only not used) */
107#define ACORE 0x08 /* ... dumped core */
108#define AXSIG 0x10 /* ... was killed by a signal */
109
110#ifdef __BIG_ENDIAN
111#define ACCT_BYTEORDER 0x80 /* accounting file is big endian */
112#else
113#define ACCT_BYTEORDER 0x00 /* accounting file is little endian */
114#endif
115
116#ifdef __KERNEL__
117
118
119#ifdef CONFIG_BSD_PROCESS_ACCT
120struct vfsmount;
121struct super_block;
122extern void acct_auto_close_mnt(struct vfsmount *m);
123extern void acct_auto_close(struct super_block *sb);
124extern void acct_init_pacct(struct pacct_struct *pacct);
125extern void acct_collect(long exitcode, int group_dead);
126extern void acct_process(void);
127#else
128#define acct_auto_close_mnt(x) do { } while (0)
129#define acct_auto_close(x) do { } while (0)
130#define acct_init_pacct(x) do { } while (0)
131#define acct_collect(x,y) do { } while (0)
132#define acct_process() do { } while (0)
133#endif
134
135/*
136 * ACCT_VERSION numbers as yet defined:
137 * 0: old format (until 2.6.7) with 16 bit uid/gid
138 * 1: extended variant (binary compatible on M68K)
139 * 2: extended variant (binary compatible on everything except M68K)
140 * 3: new binary incompatible format (64 bytes)
141 * 4: new binary incompatible format (128 bytes)
142 * 5: new binary incompatible format (128 bytes, second half)
143 *
144 */
145
146#ifdef CONFIG_BSD_PROCESS_ACCT_V3
147#define ACCT_VERSION 3
148#define AHZ 100
149typedef struct acct_v3 acct_t;
150#else
151#ifdef CONFIG_M68K
152#define ACCT_VERSION 1
153#else
154#define ACCT_VERSION 2
155#endif
156#define AHZ (USER_HZ)
157typedef struct acct acct_t;
158#endif
159
160#else
161#define ACCT_VERSION 2
162#define AHZ (HZ)
163#endif /* __KERNEL */
164
165#ifdef __KERNEL__
166#include <linux/jiffies.h>
167/*
168 * Yet another set of HZ to *HZ helper functions.
169 * See <linux/jiffies.h> for the original.
170 */
171
172static inline u32 jiffies_to_AHZ(unsigned long x)
173{
174#if (TICK_NSEC % (NSEC_PER_SEC / AHZ)) == 0
175 return x / (HZ / AHZ);
176#else
177 u64 tmp = (u64)x * TICK_NSEC;
178 do_div(tmp, (NSEC_PER_SEC / AHZ));
179 return (long)tmp;
180#endif
181}
182
183static inline u64 nsec_to_AHZ(u64 x)
184{
185#if (NSEC_PER_SEC % AHZ) == 0
186 do_div(x, (NSEC_PER_SEC / AHZ));
187#elif (AHZ % 512) == 0
188 x *= AHZ/512;
189 do_div(x, (NSEC_PER_SEC / 512));
190#else
191 /*
192 * max relative error 5.7e-8 (1.8s per year) for AHZ <= 1024,
193 * overflow after 64.99 years.
194 * exact for AHZ=60, 72, 90, 120, 144, 180, 300, 600, 900, ...
195 */
196 x *= 9;
197 do_div(x, (unsigned long)((9ull * NSEC_PER_SEC + (AHZ/2))
198 / AHZ));
199#endif
200 return x;
201}
202
203#endif /* __KERNEL */
204
205#endif /* _LINUX_ACCT_H */