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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 | |
31 | typedef __u16 comp_t; |
32 | typedef __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 | |
43 | struct 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 | |
73 | struct 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 |
120 | struct vfsmount; |
121 | struct super_block; |
122 | struct pacct_struct; |
123 | struct pid_namespace; |
124 | extern int acct_parm[]; /* for sysctl */ |
125 | extern void acct_auto_close_mnt(struct vfsmount *m); |
126 | extern void acct_auto_close(struct super_block *sb); |
127 | extern void acct_collect(long exitcode, int group_dead); |
128 | extern void acct_process(void); |
129 | extern 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_collect(x,y) do { } while (0) |
134 | #define acct_process() do { } while (0) |
135 | #define acct_exit_ns(ns) do { } while (0) |
136 | #endif |
137 | |
138 | /* |
139 | * ACCT_VERSION numbers as yet defined: |
140 | * 0: old format (until 2.6.7) with 16 bit uid/gid |
141 | * 1: extended variant (binary compatible on M68K) |
142 | * 2: extended variant (binary compatible on everything except M68K) |
143 | * 3: new binary incompatible format (64 bytes) |
144 | * 4: new binary incompatible format (128 bytes) |
145 | * 5: new binary incompatible format (128 bytes, second half) |
146 | * |
147 | */ |
148 | |
149 | #ifdef CONFIG_BSD_PROCESS_ACCT_V3 |
150 | #define ACCT_VERSION 3 |
151 | #define AHZ 100 |
152 | typedef struct acct_v3 acct_t; |
153 | #else |
154 | #ifdef CONFIG_M68K |
155 | #define ACCT_VERSION 1 |
156 | #else |
157 | #define ACCT_VERSION 2 |
158 | #endif |
159 | #define AHZ (USER_HZ) |
160 | typedef struct acct acct_t; |
161 | #endif |
162 | |
163 | #else |
164 | #define ACCT_VERSION 2 |
165 | #define AHZ (HZ) |
166 | #endif /* __KERNEL */ |
167 | |
168 | #ifdef __KERNEL__ |
169 | #include <linux/jiffies.h> |
170 | /* |
171 | * Yet another set of HZ to *HZ helper functions. |
172 | * See <linux/jiffies.h> for the original. |
173 | */ |
174 | |
175 | static inline u32 jiffies_to_AHZ(unsigned long x) |
176 | { |
177 | #if (TICK_NSEC % (NSEC_PER_SEC / AHZ)) == 0 |
178 | # if HZ < AHZ |
179 | return x * (AHZ / HZ); |
180 | # else |
181 | return x / (HZ / AHZ); |
182 | # endif |
183 | #else |
184 | u64 tmp = (u64)x * TICK_NSEC; |
185 | do_div(tmp, (NSEC_PER_SEC / AHZ)); |
186 | return (long)tmp; |
187 | #endif |
188 | } |
189 | |
190 | static inline u64 nsec_to_AHZ(u64 x) |
191 | { |
192 | #if (NSEC_PER_SEC % AHZ) == 0 |
193 | do_div(x, (NSEC_PER_SEC / AHZ)); |
194 | #elif (AHZ % 512) == 0 |
195 | x *= AHZ/512; |
196 | do_div(x, (NSEC_PER_SEC / 512)); |
197 | #else |
198 | /* |
199 | * max relative error 5.7e-8 (1.8s per year) for AHZ <= 1024, |
200 | * overflow after 64.99 years. |
201 | * exact for AHZ=60, 72, 90, 120, 144, 180, 300, 600, 900, ... |
202 | */ |
203 | x *= 9; |
204 | do_div(x, (unsigned long)((9ull * NSEC_PER_SEC + (AHZ/2)) |
205 | / AHZ)); |
206 | #endif |
207 | return x; |
208 | } |
209 | |
210 | #endif /* __KERNEL */ |
211 | |
212 | #endif /* _LINUX_ACCT_H */ |
213 |
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