~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/include/linux/acct.h

Version: ~ [ linux-5.16-rc3 ] ~ [ linux-5.15.5 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.82 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.162 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.218 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.256 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.291 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.293 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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 #ifndef _LINUX_ACCT_H
 15 #define _LINUX_ACCT_H
 16 
 17 #include <uapi/linux/acct.h>
 18 
 19 
 20 
 21 #ifdef CONFIG_BSD_PROCESS_ACCT
 22 struct vfsmount;
 23 struct super_block;
 24 struct pacct_struct;
 25 struct pid_namespace;
 26 extern int acct_parm[]; /* for sysctl */
 27 extern void acct_collect(long exitcode, int group_dead);
 28 extern void acct_process(void);
 29 extern void acct_exit_ns(struct pid_namespace *);
 30 #else
 31 #define acct_collect(x,y)       do { } while (0)
 32 #define acct_process()          do { } while (0)
 33 #define acct_exit_ns(ns)        do { } while (0)
 34 #endif
 35 
 36 /*
 37  * ACCT_VERSION numbers as yet defined:
 38  * 0: old format (until 2.6.7) with 16 bit uid/gid
 39  * 1: extended variant (binary compatible on M68K)
 40  * 2: extended variant (binary compatible on everything except M68K)
 41  * 3: new binary incompatible format (64 bytes)
 42  * 4: new binary incompatible format (128 bytes)
 43  * 5: new binary incompatible format (128 bytes, second half)
 44  *
 45  */
 46 
 47 #undef ACCT_VERSION
 48 #undef AHZ
 49 
 50 #ifdef CONFIG_BSD_PROCESS_ACCT_V3
 51 #define ACCT_VERSION    3
 52 #define AHZ             100
 53 typedef struct acct_v3 acct_t;
 54 #else
 55 #ifdef CONFIG_M68K
 56 #define ACCT_VERSION    1
 57 #else
 58 #define ACCT_VERSION    2
 59 #endif
 60 #define AHZ             (USER_HZ)
 61 typedef struct acct acct_t;
 62 #endif
 63 
 64 #include <linux/jiffies.h>
 65 /*
 66  * Yet another set of HZ to *HZ helper functions.
 67  * See <linux/jiffies.h> for the original.
 68  */
 69 
 70 static inline u32 jiffies_to_AHZ(unsigned long x)
 71 {
 72 #if (TICK_NSEC % (NSEC_PER_SEC / AHZ)) == 0
 73 # if HZ < AHZ
 74         return x * (AHZ / HZ);
 75 # else
 76         return x / (HZ / AHZ);
 77 # endif
 78 #else
 79         u64 tmp = (u64)x * TICK_NSEC;
 80         do_div(tmp, (NSEC_PER_SEC / AHZ));
 81         return (long)tmp;
 82 #endif
 83 }
 84 
 85 static inline u64 nsec_to_AHZ(u64 x)
 86 {
 87 #if (NSEC_PER_SEC % AHZ) == 0
 88         do_div(x, (NSEC_PER_SEC / AHZ));
 89 #elif (AHZ % 512) == 0
 90         x *= AHZ/512;
 91         do_div(x, (NSEC_PER_SEC / 512));
 92 #else
 93         /*
 94          * max relative error 5.7e-8 (1.8s per year) for AHZ <= 1024,
 95          * overflow after 64.99 years.
 96          * exact for AHZ=60, 72, 90, 120, 144, 180, 300, 600, 900, ...
 97          */
 98         x *= 9;
 99         do_div(x, (unsigned long)((9ull * NSEC_PER_SEC + (AHZ/2))
100                                   / AHZ));
101 #endif
102         return x;
103 }
104 
105 #endif  /* _LINUX_ACCT_H */
106 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp