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 #include <linux/jiffies.h> 20 21 #include <asm/param.h> 22 #include <asm/byteorder.h> 23 24 /* 25 * comp_t is a 16-bit "floating" point number with a 3-bit base 8 26 * exponent and a 13-bit fraction. 27 * comp2_t is 24-bit with 5-bit base 2 exponent and 20 bit fraction 28 * (leading 1 not stored). 29 * See linux/kernel/acct.c for the specific encoding systems used. 30 */ 31 32 typedef __u16 comp_t; 33 typedef __u32 comp2_t; 34 35 /* 36 * accounting file record 37 * 38 * This structure contains all of the information written out to the 39 * process accounting file whenever a process exits. 40 */ 41 42 #define ACCT_COMM 16 43 44 struct acct 45 { 46 char ac_flag; /* Flags */ 47 char ac_version; /* Always set to ACCT_VERSION */ 48 /* for binary compatibility back until 2.0 */ 49 __u16 ac_uid16; /* LSB of Real User ID */ 50 __u16 ac_gid16; /* LSB of Real Group ID */ 51 __u16 ac_tty; /* Control Terminal */ 52 __u32 ac_btime; /* Process Creation Time */ 53 comp_t ac_utime; /* User Time */ 54 comp_t ac_stime; /* System Time */ 55 comp_t ac_etime; /* Elapsed Time */ 56 comp_t ac_mem; /* Average Memory Usage */ 57 comp_t ac_io; /* Chars Transferred */ 58 comp_t ac_rw; /* Blocks Read or Written */ 59 comp_t ac_minflt; /* Minor Pagefaults */ 60 comp_t ac_majflt; /* Major Pagefaults */ 61 comp_t ac_swaps; /* Number of Swaps */ 62 /* m68k had no padding here. */ 63 #if !defined(CONFIG_M68K) || !defined(__KERNEL__) 64 __u16 ac_ahz; /* AHZ */ 65 #endif 66 __u32 ac_exitcode; /* Exitcode */ 67 char ac_comm[ACCT_COMM + 1]; /* Command Name */ 68 __u8 ac_etime_hi; /* Elapsed Time MSB */ 69 __u16 ac_etime_lo; /* Elapsed Time LSB */ 70 __u32 ac_uid; /* Real User ID */ 71 __u32 ac_gid; /* Real Group ID */ 72 }; 73 74 struct acct_v3 75 { 76 char ac_flag; /* Flags */ 77 char ac_version; /* Always set to ACCT_VERSION */ 78 __u16 ac_tty; /* Control Terminal */ 79 __u32 ac_exitcode; /* Exitcode */ 80 __u32 ac_uid; /* Real User ID */ 81 __u32 ac_gid; /* Real Group ID */ 82 __u32 ac_pid; /* Process ID */ 83 __u32 ac_ppid; /* Parent Process ID */ 84 __u32 ac_btime; /* Process Creation Time */ 85 #ifdef __KERNEL__ 86 __u32 ac_etime; /* Elapsed Time */ 87 #else 88 float ac_etime; /* Elapsed Time */ 89 #endif 90 comp_t ac_utime; /* User Time */ 91 comp_t ac_stime; /* System Time */ 92 comp_t ac_mem; /* Average Memory Usage */ 93 comp_t ac_io; /* Chars Transferred */ 94 comp_t ac_rw; /* Blocks Read or Written */ 95 comp_t ac_minflt; /* Minor Pagefaults */ 96 comp_t ac_majflt; /* Major Pagefaults */ 97 comp_t ac_swaps; /* Number of Swaps */ 98 char ac_comm[ACCT_COMM]; /* Command Name */ 99 }; 100 101 /* 102 * accounting flags 103 */ 104 /* bit set when the process ... */ 105 #define AFORK 0x01 /* ... executed fork, but did not exec */ 106 #define ASU 0x02 /* ... used super-user privileges */ 107 #define ACOMPAT 0x04 /* ... used compatibility mode (VAX only not used) */ 108 #define ACORE 0x08 /* ... dumped core */ 109 #define AXSIG 0x10 /* ... was killed by a signal */ 110 111 #ifdef __BIG_ENDIAN 112 #define ACCT_BYTEORDER 0x80 /* accounting file is big endian */ 113 #else 114 #define ACCT_BYTEORDER 0x00 /* accounting file is little endian */ 115 #endif 116 117 #ifdef __KERNEL__ 118 119 #include <linux/config.h> 120 121 #ifdef CONFIG_BSD_PROCESS_ACCT 122 struct vfsmount; 123 struct super_block; 124 extern void acct_auto_close_mnt(struct vfsmount *m); 125 extern void acct_auto_close(struct super_block *sb); 126 extern void acct_process(long exitcode); 127 extern void acct_update_integrals(struct task_struct *tsk); 128 extern void acct_clear_integrals(struct task_struct *tsk); 129 #else 130 #define acct_auto_close_mnt(x) do { } while (0) 131 #define acct_auto_close(x) do { } while (0) 132 #define acct_process(x) do { } while (0) 133 #define acct_update_integrals(x) do { } while (0) 134 #define acct_clear_integrals(task) 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 /* 169 * Yet another set of HZ to *HZ helper functions. 170 * See <linux/jiffies.h> for the original. 171 */ 172 173 static inline u32 jiffies_to_AHZ(unsigned long x) 174 { 175 #if (TICK_NSEC % (NSEC_PER_SEC / AHZ)) == 0 176 return x / (HZ / AHZ); 177 #else 178 u64 tmp = (u64)x * TICK_NSEC; 179 do_div(tmp, (NSEC_PER_SEC / AHZ)); 180 return (long)tmp; 181 #endif 182 } 183 184 static inline u64 nsec_to_AHZ(u64 x) 185 { 186 #if (NSEC_PER_SEC % AHZ) == 0 187 do_div(x, (NSEC_PER_SEC / AHZ)); 188 #elif (AHZ % 512) == 0 189 x *= AHZ/512; 190 do_div(x, (NSEC_PER_SEC / 512)); 191 #else 192 /* 193 * max relative error 5.7e-8 (1.8s per year) for AHZ <= 1024, 194 * overflow after 64.99 years. 195 * exact for AHZ=60, 72, 90, 120, 144, 180, 300, 600, 900, ... 196 */ 197 x *= 9; 198 do_div(x, (unsigned long)((9ull * NSEC_PER_SEC + (AHZ/2)) 199 / AHZ)); 200 #endif 201 return x; 202 } 203 204 #endif /* __KERNEL */ 205 206 #endif /* _LINUX_ACCT_H */ 207