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1da177e4 LT |
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 | #include <asm/param.h> | |
20 | #include <asm/byteorder.h> | |
21 | ||
22 | /* | |
23 | * comp_t is a 16-bit "floating" point number with a 3-bit base 8 | |
24 | * exponent and a 13-bit fraction. | |
25 | * comp2_t is 24-bit with 5-bit base 2 exponent and 20 bit fraction | |
26 | * (leading 1 not stored). | |
27 | * See linux/kernel/acct.c for the specific encoding systems used. | |
28 | */ | |
29 | ||
30 | typedef __u16 comp_t; | |
31 | typedef __u32 comp2_t; | |
32 | ||
33 | /* | |
34 | * accounting file record | |
35 | * | |
36 | * This structure contains all of the information written out to the | |
37 | * process accounting file whenever a process exits. | |
38 | */ | |
39 | ||
40 | #define ACCT_COMM 16 | |
41 | ||
42 | struct acct | |
43 | { | |
44 | char ac_flag; /* Flags */ | |
45 | char ac_version; /* Always set to ACCT_VERSION */ | |
46 | /* for binary compatibility back until 2.0 */ | |
47 | __u16 ac_uid16; /* LSB of Real User ID */ | |
48 | __u16 ac_gid16; /* LSB of Real Group ID */ | |
49 | __u16 ac_tty; /* Control Terminal */ | |
50 | __u32 ac_btime; /* Process Creation Time */ | |
51 | comp_t ac_utime; /* User Time */ | |
52 | comp_t ac_stime; /* System Time */ | |
53 | comp_t ac_etime; /* Elapsed Time */ | |
54 | comp_t ac_mem; /* Average Memory Usage */ | |
55 | comp_t ac_io; /* Chars Transferred */ | |
56 | comp_t ac_rw; /* Blocks Read or Written */ | |
57 | comp_t ac_minflt; /* Minor Pagefaults */ | |
58 | comp_t ac_majflt; /* Major Pagefaults */ | |
59 | comp_t ac_swaps; /* Number of Swaps */ | |
60 | /* m68k had no padding here. */ | |
61 | #if !defined(CONFIG_M68K) || !defined(__KERNEL__) | |
62 | __u16 ac_ahz; /* AHZ */ | |
63 | #endif | |
64 | __u32 ac_exitcode; /* Exitcode */ | |
65 | char ac_comm[ACCT_COMM + 1]; /* Command Name */ | |
66 | __u8 ac_etime_hi; /* Elapsed Time MSB */ | |
67 | __u16 ac_etime_lo; /* Elapsed Time LSB */ | |
68 | __u32 ac_uid; /* Real User ID */ | |
69 | __u32 ac_gid; /* Real Group ID */ | |
70 | }; | |
71 | ||
72 | struct acct_v3 | |
73 | { | |
74 | char ac_flag; /* Flags */ | |
75 | char ac_version; /* Always set to ACCT_VERSION */ | |
76 | __u16 ac_tty; /* Control Terminal */ | |
77 | __u32 ac_exitcode; /* Exitcode */ | |
78 | __u32 ac_uid; /* Real User ID */ | |
79 | __u32 ac_gid; /* Real Group ID */ | |
80 | __u32 ac_pid; /* Process ID */ | |
81 | __u32 ac_ppid; /* Parent Process ID */ | |
82 | __u32 ac_btime; /* Process Creation Time */ | |
83 | #ifdef __KERNEL__ | |
84 | __u32 ac_etime; /* Elapsed Time */ | |
85 | #else | |
86 | float ac_etime; /* Elapsed Time */ | |
87 | #endif | |
88 | comp_t ac_utime; /* User Time */ | |
89 | comp_t ac_stime; /* System Time */ | |
90 | comp_t ac_mem; /* Average Memory Usage */ | |
91 | comp_t ac_io; /* Chars Transferred */ | |
92 | comp_t ac_rw; /* Blocks Read or Written */ | |
93 | comp_t ac_minflt; /* Minor Pagefaults */ | |
94 | comp_t ac_majflt; /* Major Pagefaults */ | |
95 | comp_t ac_swaps; /* Number of Swaps */ | |
96 | char ac_comm[ACCT_COMM]; /* Command Name */ | |
97 | }; | |
98 | ||
99 | /* | |
100 | * accounting flags | |
101 | */ | |
102 | /* bit set when the process ... */ | |
103 | #define AFORK 0x01 /* ... executed fork, but did not exec */ | |
104 | #define ASU 0x02 /* ... used super-user privileges */ | |
105 | #define ACOMPAT 0x04 /* ... used compatibility mode (VAX only not used) */ | |
106 | #define ACORE 0x08 /* ... dumped core */ | |
107 | #define AXSIG 0x10 /* ... was killed by a signal */ | |
108 | ||
109 | #ifdef __BIG_ENDIAN | |
110 | #define ACCT_BYTEORDER 0x80 /* accounting file is big endian */ | |
111 | #else | |
112 | #define ACCT_BYTEORDER 0x00 /* accounting file is little endian */ | |
113 | #endif | |
114 | ||
115 | #ifdef __KERNEL__ | |
116 | ||
117 | #include <linux/config.h> | |
118 | ||
119 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
120 | struct super_block; | |
121 | extern void acct_auto_close(struct super_block *sb); | |
122 | extern void acct_process(long exitcode); | |
123 | extern void acct_update_integrals(struct task_struct *tsk); | |
124 | extern void acct_clear_integrals(struct task_struct *tsk); | |
125 | #else | |
126 | #define acct_auto_close(x) do { } while (0) | |
127 | #define acct_process(x) do { } while (0) | |
128 | #define acct_update_integrals(x) do { } while (0) | |
129 | #define acct_clear_integrals(task) do { } while (0) | |
130 | #endif | |
131 | ||
132 | /* | |
133 | * ACCT_VERSION numbers as yet defined: | |
134 | * 0: old format (until 2.6.7) with 16 bit uid/gid | |
135 | * 1: extended variant (binary compatible on M68K) | |
136 | * 2: extended variant (binary compatible on everything except M68K) | |
137 | * 3: new binary incompatible format (64 bytes) | |
138 | * 4: new binary incompatible format (128 bytes) | |
139 | * 5: new binary incompatible format (128 bytes, second half) | |
140 | * | |
141 | */ | |
142 | ||
143 | #ifdef CONFIG_BSD_PROCESS_ACCT_V3 | |
144 | #define ACCT_VERSION 3 | |
145 | #define AHZ 100 | |
146 | typedef struct acct_v3 acct_t; | |
147 | #else | |
148 | #ifdef CONFIG_M68K | |
149 | #define ACCT_VERSION 1 | |
150 | #else | |
151 | #define ACCT_VERSION 2 | |
152 | #endif | |
153 | #define AHZ (USER_HZ) | |
154 | typedef struct acct acct_t; | |
155 | #endif | |
156 | ||
157 | #else | |
158 | #define ACCT_VERSION 2 | |
159 | #define AHZ (HZ) | |
160 | #endif /* __KERNEL */ | |
161 | ||
162 | #ifdef __KERNEL__ | |
163 | /* | |
164 | * Yet another set of HZ to *HZ helper functions. | |
165 | * See <linux/times.h> for the original. | |
166 | */ | |
167 | ||
168 | static inline u32 jiffies_to_AHZ(unsigned long x) | |
169 | { | |
170 | #if (TICK_NSEC % (NSEC_PER_SEC / AHZ)) == 0 | |
171 | return x / (HZ / USER_HZ); | |
172 | #else | |
173 | u64 tmp = (u64)x * TICK_NSEC; | |
174 | do_div(tmp, (NSEC_PER_SEC / AHZ)); | |
175 | return (long)tmp; | |
176 | #endif | |
177 | } | |
178 | ||
179 | static inline u64 nsec_to_AHZ(u64 x) | |
180 | { | |
181 | #if (NSEC_PER_SEC % AHZ) == 0 | |
182 | do_div(x, (NSEC_PER_SEC / AHZ)); | |
183 | #elif (AHZ % 512) == 0 | |
184 | x *= AHZ/512; | |
185 | do_div(x, (NSEC_PER_SEC / 512)); | |
186 | #else | |
187 | /* | |
188 | * max relative error 5.7e-8 (1.8s per year) for AHZ <= 1024, | |
189 | * overflow after 64.99 years. | |
190 | * exact for AHZ=60, 72, 90, 120, 144, 180, 300, 600, 900, ... | |
191 | */ | |
192 | x *= 9; | |
193 | do_div(x, (unsigned long)((9ull * NSEC_PER_SEC + (AHZ/2)) | |
194 | / AHZ)); | |
195 | #endif | |
196 | return x; | |
197 | } | |
198 | ||
199 | #endif /* __KERNEL */ | |
200 | ||
201 | #endif /* _LINUX_ACCT_H */ |