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