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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;
122struct pacct_struct;
123struct pid_namespace;
124extern void acct_auto_close_mnt(struct vfsmount *m);
125extern void acct_auto_close(struct super_block *sb);
126extern void acct_init_pacct(struct pacct_struct *pacct);
127extern void acct_collect(long exitcode, int group_dead);
128extern void acct_process(void);
129extern void acct_exit_ns(struct pid_namespace *);
130#else
131#define acct_auto_close_mnt(x) do { } while (0)
132#define acct_auto_close(x) do { } while (0)
133#define acct_init_pacct(x) do { } while (0)
134#define acct_collect(x,y) do { } while (0)
135#define acct_process() do { } while (0)
136#define acct_exit_ns(ns) do { } while (0)
137#endif
138
139/*
140 * ACCT_VERSION numbers as yet defined:
141 * 0: old format (until 2.6.7) with 16 bit uid/gid
142 * 1: extended variant (binary compatible on M68K)
143 * 2: extended variant (binary compatible on everything except M68K)
144 * 3: new binary incompatible format (64 bytes)
145 * 4: new binary incompatible format (128 bytes)
146 * 5: new binary incompatible format (128 bytes, second half)
147 *
148 */
149
150#ifdef CONFIG_BSD_PROCESS_ACCT_V3
151#define ACCT_VERSION 3
152#define AHZ 100
153typedef struct acct_v3 acct_t;
154#else
155#ifdef CONFIG_M68K
156#define ACCT_VERSION 1
157#else
158#define ACCT_VERSION 2
159#endif
160#define AHZ (USER_HZ)
161typedef struct acct acct_t;
162#endif
163
164#else
165#define ACCT_VERSION 2
166#define AHZ (HZ)
167#endif /* __KERNEL */
168
169#ifdef __KERNEL__
170#include <linux/jiffies.h>
171/*
172 * Yet another set of HZ to *HZ helper functions.
173 * See <linux/jiffies.h> for the original.
174 */
175
176static inline u32 jiffies_to_AHZ(unsigned long x)
177{
178#if (TICK_NSEC % (NSEC_PER_SEC / AHZ)) == 0
179# if HZ < AHZ
180 return x * (AHZ / HZ);
181# else
182 return x / (HZ / AHZ);
183# endif
184#else
185 u64 tmp = (u64)x * TICK_NSEC;
186 do_div(tmp, (NSEC_PER_SEC / AHZ));
187 return (long)tmp;
188#endif
189}
190
191static inline u64 nsec_to_AHZ(u64 x)
192{
193#if (NSEC_PER_SEC % AHZ) == 0
194 do_div(x, (NSEC_PER_SEC / AHZ));
195#elif (AHZ % 512) == 0
196 x *= AHZ/512;
197 do_div(x, (NSEC_PER_SEC / 512));
198#else
199 /*
200 * max relative error 5.7e-8 (1.8s per year) for AHZ <= 1024,
201 * overflow after 64.99 years.
202 * exact for AHZ=60, 72, 90, 120, 144, 180, 300, 600, 900, ...
203 */
204 x *= 9;
205 do_div(x, (unsigned long)((9ull * NSEC_PER_SEC + (AHZ/2))
206 / AHZ));
207#endif
208 return x;
209}
210
211#endif /* __KERNEL */
212
213#endif /* _LINUX_ACCT_H */