summaryrefslogtreecommitdiff
path: root/include/linux/acct.h
blob: 0496d1f0995212b4c8ae873ac5e7159fcab318cb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
/*
 *  BSD Process Accounting for Linux - Definitions
 *
 *  Author: Marco van Wieringen (mvw@planets.elm.net)
 *
 *  This header file contains the definitions needed to implement
 *  BSD-style process accounting. The kernel accounting code and all
 *  user-level programs that try to do something useful with the
 *  process accounting log must include this file.
 *
 *  Copyright (C) 1995 - 1997 Marco van Wieringen - ELM Consultancy B.V.
 *
 */

#ifndef _LINUX_ACCT_H
#define _LINUX_ACCT_H

#include <linux/types.h>

#include <asm/param.h>
#include <asm/byteorder.h>

/* 
 *  comp_t is a 16-bit "floating" point number with a 3-bit base 8
 *  exponent and a 13-bit fraction.
 *  comp2_t is 24-bit with 5-bit base 2 exponent and 20 bit fraction
 *  (leading 1 not stored).
 *  See linux/kernel/acct.c for the specific encoding systems used.
 */

typedef __u16	comp_t;
typedef __u32	comp2_t;

/*
 *   accounting file record
 *
 *   This structure contains all of the information written out to the
 *   process accounting file whenever a process exits.
 */

#define ACCT_COMM	16

struct acct
{
	char		ac_flag;		/* Flags */
	char		ac_version;		/* Always set to ACCT_VERSION */
	/* for binary compatibility back until 2.0 */
	__u16		ac_uid16;		/* LSB of Real User ID */
	__u16		ac_gid16;		/* LSB of Real Group ID */
	__u16		ac_tty;			/* Control Terminal */
	__u32		ac_btime;		/* Process Creation Time */
	comp_t		ac_utime;		/* User Time */
	comp_t		ac_stime;		/* System Time */
	comp_t		ac_etime;		/* Elapsed Time */
	comp_t		ac_mem;			/* Average Memory Usage */
	comp_t		ac_io;			/* Chars Transferred */
	comp_t		ac_rw;			/* Blocks Read or Written */
	comp_t		ac_minflt;		/* Minor Pagefaults */
	comp_t		ac_majflt;		/* Major Pagefaults */
	comp_t		ac_swaps;		/* Number of Swaps */
/* m68k had no padding here. */
#if !defined(CONFIG_M68K) || !defined(__KERNEL__)
	__u16		ac_ahz;			/* AHZ */
#endif
	__u32		ac_exitcode;		/* Exitcode */
	char		ac_comm[ACCT_COMM + 1];	/* Command Name */
	__u8		ac_etime_hi;		/* Elapsed Time MSB */
	__u16		ac_etime_lo;		/* Elapsed Time LSB */
	__u32		ac_uid;			/* Real User ID */
	__u32		ac_gid;			/* Real Group ID */
};

struct acct_v3
{
	char		ac_flag;		/* Flags */
	char		ac_version;		/* Always set to ACCT_VERSION */
	__u16		ac_tty;			/* Control Terminal */
	__u32		ac_exitcode;		/* Exitcode */
	__u32		ac_uid;			/* Real User ID */
	__u32		ac_gid;			/* Real Group ID */
	__u32		ac_pid;			/* Process ID */
	__u32		ac_ppid;		/* Parent Process ID */
	__u32		ac_btime;		/* Process Creation Time */
#ifdef __KERNEL__
	__u32		ac_etime;		/* Elapsed Time */
#else
	float		ac_etime;		/* Elapsed Time */
#endif
	comp_t		ac_utime;		/* User Time */
	comp_t		ac_stime;		/* System Time */
	comp_t		ac_mem;			/* Average Memory Usage */
	comp_t		ac_io;			/* Chars Transferred */
	comp_t		ac_rw;			/* Blocks Read or Written */
	comp_t		ac_minflt;		/* Minor Pagefaults */
	comp_t		ac_majflt;		/* Major Pagefaults */
	comp_t		ac_swaps;		/* Number of Swaps */
	char		ac_comm[ACCT_COMM];	/* Command Name */
};

/*
 *  accounting flags
 */
				/* bit set when the process ... */
#define AFORK		0x01	/* ... executed fork, but did not exec */
#define ASU		0x02	/* ... used super-user privileges */
#define ACOMPAT		0x04	/* ... used compatibility mode (VAX only not used) */
#define ACORE		0x08	/* ... dumped core */
#define AXSIG		0x10	/* ... was killed by a signal */

#ifdef __BIG_ENDIAN
#define ACCT_BYTEORDER	0x80	/* accounting file is big endian */
#else
#define ACCT_BYTEORDER	0x00	/* accounting file is little endian */
#endif

#ifdef __KERNEL__


#ifdef CONFIG_BSD_PROCESS_ACCT
struct vfsmount;
struct super_block;
extern void acct_auto_close_mnt(struct vfsmount *m);
extern void acct_auto_close(struct super_block *sb);
extern void acct_init_pacct(struct pacct_struct *pacct);
extern void acct_collect(long exitcode, int group_dead);
extern void acct_process(void);
#else
#define acct_auto_close_mnt(x)	do { } while (0)
#define acct_auto_close(x)	do { } while (0)
#define acct_init_pacct(x)	do { } while (0)
#define acct_collect(x,y)	do { } while (0)
#define acct_process()		do { } while (0)
#endif

/*
 * ACCT_VERSION numbers as yet defined:
 * 0: old format (until 2.6.7) with 16 bit uid/gid
 * 1: extended variant (binary compatible on M68K)
 * 2: extended variant (binary compatible on everything except M68K)
 * 3: new binary incompatible format (64 bytes)
 * 4: new binary incompatible format (128 bytes)
 * 5: new binary incompatible format (128 bytes, second half)
 *
 */

#ifdef CONFIG_BSD_PROCESS_ACCT_V3
#define ACCT_VERSION	3
#define AHZ		100
typedef struct acct_v3 acct_t;
#else
#ifdef CONFIG_M68K
#define ACCT_VERSION	1
#else
#define ACCT_VERSION	2
#endif
#define AHZ		(USER_HZ)
typedef struct acct acct_t;
#endif

#else
#define ACCT_VERSION	2
#define AHZ		(HZ)
#endif	/* __KERNEL */

#ifdef __KERNEL__
#include <linux/jiffies.h>
/*
 * Yet another set of HZ to *HZ helper functions.
 * See <linux/jiffies.h> for the original.
 */

static inline u32 jiffies_to_AHZ(unsigned long x)
{
#if (TICK_NSEC % (NSEC_PER_SEC / AHZ)) == 0
	return x / (HZ / AHZ);
#else
        u64 tmp = (u64)x * TICK_NSEC;
        do_div(tmp, (NSEC_PER_SEC / AHZ));
        return (long)tmp;
#endif
}

static inline u64 nsec_to_AHZ(u64 x)
{
#if (NSEC_PER_SEC % AHZ) == 0
	do_div(x, (NSEC_PER_SEC / AHZ));
#elif (AHZ % 512) == 0
	x *= AHZ/512;
	do_div(x, (NSEC_PER_SEC / 512));
#else
	/*
         * max relative error 5.7e-8 (1.8s per year) for AHZ <= 1024,
         * overflow after 64.99 years.
         * exact for AHZ=60, 72, 90, 120, 144, 180, 300, 600, 900, ...
         */
	x *= 9;
	do_div(x, (unsigned long)((9ull * NSEC_PER_SEC + (AHZ/2))
	                          / AHZ));
#endif
	return x;
}

#endif  /* __KERNEL */

#endif	/* _LINUX_ACCT_H */