2005-04-17 05:20:36 +07:00
|
|
|
#ifndef _LINUX_TIME_H
|
|
|
|
#define _LINUX_TIME_H
|
|
|
|
|
|
|
|
#include <linux/types.h>
|
|
|
|
|
|
|
|
#ifdef __KERNEL__
|
2007-07-21 18:37:37 +07:00
|
|
|
# include <linux/cache.h>
|
2006-01-10 11:52:26 +07:00
|
|
|
# include <linux/seqlock.h>
|
2005-04-17 05:20:36 +07:00
|
|
|
#endif
|
|
|
|
|
|
|
|
#ifndef _STRUCT_TIMESPEC
|
|
|
|
#define _STRUCT_TIMESPEC
|
|
|
|
struct timespec {
|
|
|
|
time_t tv_sec; /* seconds */
|
|
|
|
long tv_nsec; /* nanoseconds */
|
|
|
|
};
|
2006-01-10 11:52:26 +07:00
|
|
|
#endif
|
2005-04-17 05:20:36 +07:00
|
|
|
|
|
|
|
struct timeval {
|
|
|
|
time_t tv_sec; /* seconds */
|
|
|
|
suseconds_t tv_usec; /* microseconds */
|
|
|
|
};
|
|
|
|
|
|
|
|
struct timezone {
|
|
|
|
int tz_minuteswest; /* minutes west of Greenwich */
|
|
|
|
int tz_dsttime; /* type of dst correction */
|
|
|
|
};
|
|
|
|
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
|
2006-01-10 11:52:26 +07:00
|
|
|
/* Parameters used to convert the timespec values: */
|
2006-06-26 18:58:20 +07:00
|
|
|
#define MSEC_PER_SEC 1000L
|
|
|
|
#define USEC_PER_MSEC 1000L
|
|
|
|
#define NSEC_PER_USEC 1000L
|
|
|
|
#define NSEC_PER_MSEC 1000000L
|
|
|
|
#define USEC_PER_SEC 1000000L
|
|
|
|
#define NSEC_PER_SEC 1000000000L
|
|
|
|
#define FSEC_PER_SEC 1000000000000000L
|
2005-04-17 05:20:36 +07:00
|
|
|
|
2007-07-17 18:03:53 +07:00
|
|
|
static inline int timespec_equal(const struct timespec *a,
|
|
|
|
const struct timespec *b)
|
2006-01-10 11:52:26 +07:00
|
|
|
{
|
2005-04-17 05:20:36 +07:00
|
|
|
return (a->tv_sec == b->tv_sec) && (a->tv_nsec == b->tv_nsec);
|
2006-01-10 11:52:26 +07:00
|
|
|
}
|
2005-04-17 05:20:36 +07:00
|
|
|
|
2006-02-12 08:55:52 +07:00
|
|
|
/*
|
|
|
|
* lhs < rhs: return <0
|
|
|
|
* lhs == rhs: return 0
|
|
|
|
* lhs > rhs: return >0
|
|
|
|
*/
|
2007-02-10 16:45:49 +07:00
|
|
|
static inline int timespec_compare(const struct timespec *lhs, const struct timespec *rhs)
|
2006-02-12 08:55:52 +07:00
|
|
|
{
|
|
|
|
if (lhs->tv_sec < rhs->tv_sec)
|
|
|
|
return -1;
|
|
|
|
if (lhs->tv_sec > rhs->tv_sec)
|
|
|
|
return 1;
|
|
|
|
return lhs->tv_nsec - rhs->tv_nsec;
|
|
|
|
}
|
|
|
|
|
2007-02-10 16:45:49 +07:00
|
|
|
static inline int timeval_compare(const struct timeval *lhs, const struct timeval *rhs)
|
2006-02-12 08:55:52 +07:00
|
|
|
{
|
|
|
|
if (lhs->tv_sec < rhs->tv_sec)
|
|
|
|
return -1;
|
|
|
|
if (lhs->tv_sec > rhs->tv_sec)
|
|
|
|
return 1;
|
|
|
|
return lhs->tv_usec - rhs->tv_usec;
|
|
|
|
}
|
|
|
|
|
2006-01-10 11:52:23 +07:00
|
|
|
extern unsigned long mktime(const unsigned int year, const unsigned int mon,
|
|
|
|
const unsigned int day, const unsigned int hour,
|
|
|
|
const unsigned int min, const unsigned int sec);
|
|
|
|
|
|
|
|
extern void set_normalized_timespec(struct timespec *ts, time_t sec, long nsec);
|
2005-04-17 05:20:36 +07:00
|
|
|
|
2006-07-14 14:24:36 +07:00
|
|
|
/*
|
|
|
|
* sub = lhs - rhs, in normalized form
|
|
|
|
*/
|
|
|
|
static inline struct timespec timespec_sub(struct timespec lhs,
|
|
|
|
struct timespec rhs)
|
|
|
|
{
|
|
|
|
struct timespec ts_delta;
|
|
|
|
set_normalized_timespec(&ts_delta, lhs.tv_sec - rhs.tv_sec,
|
|
|
|
lhs.tv_nsec - rhs.tv_nsec);
|
|
|
|
return ts_delta;
|
|
|
|
}
|
|
|
|
|
2006-01-10 11:52:29 +07:00
|
|
|
/*
|
|
|
|
* Returns true if the timespec is norm, false if denorm:
|
|
|
|
*/
|
|
|
|
#define timespec_valid(ts) \
|
2006-02-01 10:10:23 +07:00
|
|
|
(((ts)->tv_sec >= 0) && (((unsigned long) (ts)->tv_nsec) < NSEC_PER_SEC))
|
2006-01-10 11:52:29 +07:00
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
extern struct timespec xtime;
|
|
|
|
extern struct timespec wall_to_monotonic;
|
2007-02-13 19:26:21 +07:00
|
|
|
extern seqlock_t xtime_lock __attribute__((weak));
|
2005-04-17 05:20:36 +07:00
|
|
|
|
2007-02-16 16:27:30 +07:00
|
|
|
extern unsigned long read_persistent_clock(void);
|
2007-07-21 18:37:37 +07:00
|
|
|
extern int update_persistent_clock(struct timespec now);
|
|
|
|
extern int no_sync_cmos_clock __read_mostly;
|
2006-06-26 14:25:06 +07:00
|
|
|
void timekeeping_init(void);
|
|
|
|
|
2007-07-25 08:38:34 +07:00
|
|
|
unsigned long get_seconds(void);
|
2005-04-17 05:20:36 +07:00
|
|
|
struct timespec current_kernel_time(void);
|
|
|
|
|
2006-01-10 11:52:26 +07:00
|
|
|
#define CURRENT_TIME (current_kernel_time())
|
2007-07-25 07:47:43 +07:00
|
|
|
#define CURRENT_TIME_SEC ((struct timespec) { get_seconds(), 0 })
|
2005-04-17 05:20:36 +07:00
|
|
|
|
|
|
|
extern void do_gettimeofday(struct timeval *tv);
|
|
|
|
extern int do_settimeofday(struct timespec *tv);
|
|
|
|
extern int do_sys_settimeofday(struct timespec *tv, struct timezone *tz);
|
2006-01-10 11:52:38 +07:00
|
|
|
#define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts)
|
utimensat implementation
Implement utimensat(2) which is an extension to futimesat(2) in that it
a) supports nano-second resolution for the timestamps
b) allows to selectively ignore the atime/mtime value
c) allows to selectively use the current time for either atime or mtime
d) supports changing the atime/mtime of a symlink itself along the lines
of the BSD lutimes(3) functions
For this change the internally used do_utimes() functions was changed to
accept a timespec time value and an additional flags parameter.
Additionally the sys_utime function was changed to match compat_sys_utime
which already use do_utimes instead of duplicating the work.
Also, the completely missing futimensat() functionality is added. We have
such a function in glibc but we have to resort to using /proc/self/fd/* which
not everybody likes (chroot etc).
Test application (the syscall number will need per-arch editing):
#include <errno.h>
#include <fcntl.h>
#include <time.h>
#include <sys/time.h>
#include <stddef.h>
#include <syscall.h>
#define __NR_utimensat 280
#define UTIME_NOW ((1l << 30) - 1l)
#define UTIME_OMIT ((1l << 30) - 2l)
int
main(void)
{
int status = 0;
int fd = open("ttt", O_RDWR|O_CREAT|O_EXCL, 0666);
if (fd == -1)
error (1, errno, "failed to create test file \"ttt\"");
struct stat64 st1;
if (fstat64 (fd, &st1) != 0)
error (1, errno, "fstat failed");
struct timespec t[2];
t[0].tv_sec = 0;
t[0].tv_nsec = 0;
t[1].tv_sec = 0;
t[1].tv_nsec = 0;
if (syscall(__NR_utimensat, AT_FDCWD, "ttt", t, 0) != 0)
error (1, errno, "utimensat failed");
struct stat64 st2;
if (fstat64 (fd, &st2) != 0)
error (1, errno, "fstat failed");
if (st2.st_atim.tv_sec != 0 || st2.st_atim.tv_nsec != 0)
{
puts ("atim not reset to zero");
status = 1;
}
if (st2.st_mtim.tv_sec != 0 || st2.st_mtim.tv_nsec != 0)
{
puts ("mtim not reset to zero");
status = 1;
}
if (status != 0)
goto out;
t[0] = st1.st_atim;
t[1].tv_sec = 0;
t[1].tv_nsec = UTIME_OMIT;
if (syscall(__NR_utimensat, AT_FDCWD, "ttt", t, 0) != 0)
error (1, errno, "utimensat failed");
if (fstat64 (fd, &st2) != 0)
error (1, errno, "fstat failed");
if (st2.st_atim.tv_sec != st1.st_atim.tv_sec
|| st2.st_atim.tv_nsec != st1.st_atim.tv_nsec)
{
puts ("atim not set");
status = 1;
}
if (st2.st_mtim.tv_sec != 0 || st2.st_mtim.tv_nsec != 0)
{
puts ("mtim changed from zero");
status = 1;
}
if (status != 0)
goto out;
t[0].tv_sec = 0;
t[0].tv_nsec = UTIME_OMIT;
t[1] = st1.st_mtim;
if (syscall(__NR_utimensat, AT_FDCWD, "ttt", t, 0) != 0)
error (1, errno, "utimensat failed");
if (fstat64 (fd, &st2) != 0)
error (1, errno, "fstat failed");
if (st2.st_atim.tv_sec != st1.st_atim.tv_sec
|| st2.st_atim.tv_nsec != st1.st_atim.tv_nsec)
{
puts ("mtim changed from original time");
status = 1;
}
if (st2.st_mtim.tv_sec != st1.st_mtim.tv_sec
|| st2.st_mtim.tv_nsec != st1.st_mtim.tv_nsec)
{
puts ("mtim not set");
status = 1;
}
if (status != 0)
goto out;
sleep (2);
t[0].tv_sec = 0;
t[0].tv_nsec = UTIME_NOW;
t[1].tv_sec = 0;
t[1].tv_nsec = UTIME_NOW;
if (syscall(__NR_utimensat, AT_FDCWD, "ttt", t, 0) != 0)
error (1, errno, "utimensat failed");
if (fstat64 (fd, &st2) != 0)
error (1, errno, "fstat failed");
struct timeval tv;
gettimeofday(&tv,NULL);
if (st2.st_atim.tv_sec <= st1.st_atim.tv_sec
|| st2.st_atim.tv_sec > tv.tv_sec)
{
puts ("atim not set to NOW");
status = 1;
}
if (st2.st_mtim.tv_sec <= st1.st_mtim.tv_sec
|| st2.st_mtim.tv_sec > tv.tv_sec)
{
puts ("mtim not set to NOW");
status = 1;
}
if (symlink ("ttt", "tttsym") != 0)
error (1, errno, "cannot create symlink");
t[0].tv_sec = 0;
t[0].tv_nsec = 0;
t[1].tv_sec = 0;
t[1].tv_nsec = 0;
if (syscall(__NR_utimensat, AT_FDCWD, "tttsym", t, AT_SYMLINK_NOFOLLOW) != 0)
error (1, errno, "utimensat failed");
if (lstat64 ("tttsym", &st2) != 0)
error (1, errno, "lstat failed");
if (st2.st_atim.tv_sec != 0 || st2.st_atim.tv_nsec != 0)
{
puts ("symlink atim not reset to zero");
status = 1;
}
if (st2.st_mtim.tv_sec != 0 || st2.st_mtim.tv_nsec != 0)
{
puts ("symlink mtim not reset to zero");
status = 1;
}
if (status != 0)
goto out;
t[0].tv_sec = 1;
t[0].tv_nsec = 0;
t[1].tv_sec = 1;
t[1].tv_nsec = 0;
if (syscall(__NR_utimensat, fd, NULL, t, 0) != 0)
error (1, errno, "utimensat failed");
if (fstat64 (fd, &st2) != 0)
error (1, errno, "fstat failed");
if (st2.st_atim.tv_sec != 1 || st2.st_atim.tv_nsec != 0)
{
puts ("atim not reset to one");
status = 1;
}
if (st2.st_mtim.tv_sec != 1 || st2.st_mtim.tv_nsec != 0)
{
puts ("mtim not reset to one");
status = 1;
}
if (status == 0)
puts ("all OK");
out:
close (fd);
unlink ("ttt");
unlink ("tttsym");
return status;
}
[akpm@linux-foundation.org: add missing i386 syscall table entry]
Signed-off-by: Ulrich Drepper <drepper@redhat.com>
Cc: Alexey Dobriyan <adobriyan@openvz.org>
Cc: Michael Kerrisk <mtk-manpages@gmx.net>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08 14:33:25 +07:00
|
|
|
extern long do_utimes(int dfd, char __user *filename, struct timespec *times, int flags);
|
2005-04-17 05:20:36 +07:00
|
|
|
struct itimerval;
|
2006-01-10 11:52:26 +07:00
|
|
|
extern int do_setitimer(int which, struct itimerval *value,
|
|
|
|
struct itimerval *ovalue);
|
2006-03-25 18:06:33 +07:00
|
|
|
extern unsigned int alarm_setitimer(unsigned int seconds);
|
2005-04-17 05:20:36 +07:00
|
|
|
extern int do_getitimer(int which, struct itimerval *value);
|
2006-01-10 11:52:26 +07:00
|
|
|
extern void getnstimeofday(struct timespec *tv);
|
2007-07-16 13:39:41 +07:00
|
|
|
extern void getboottime(struct timespec *ts);
|
|
|
|
extern void monotonic_to_bootbased(struct timespec *ts);
|
2005-04-17 05:20:36 +07:00
|
|
|
|
|
|
|
extern struct timespec timespec_trunc(struct timespec t, unsigned gran);
|
2006-06-26 14:25:08 +07:00
|
|
|
extern int timekeeping_is_continuous(void);
|
2007-05-08 14:27:59 +07:00
|
|
|
extern void update_wall_time(void);
|
2005-04-17 05:20:36 +07:00
|
|
|
|
2006-01-10 11:52:30 +07:00
|
|
|
/**
|
|
|
|
* timespec_to_ns - Convert timespec to nanoseconds
|
|
|
|
* @ts: pointer to the timespec variable to be converted
|
|
|
|
*
|
|
|
|
* Returns the scalar nanosecond representation of the timespec
|
|
|
|
* parameter.
|
|
|
|
*/
|
2006-03-26 16:38:11 +07:00
|
|
|
static inline s64 timespec_to_ns(const struct timespec *ts)
|
2006-01-10 11:52:30 +07:00
|
|
|
{
|
2006-03-26 16:38:11 +07:00
|
|
|
return ((s64) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec;
|
2006-01-10 11:52:30 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* timeval_to_ns - Convert timeval to nanoseconds
|
|
|
|
* @ts: pointer to the timeval variable to be converted
|
|
|
|
*
|
|
|
|
* Returns the scalar nanosecond representation of the timeval
|
|
|
|
* parameter.
|
|
|
|
*/
|
2006-03-26 16:38:11 +07:00
|
|
|
static inline s64 timeval_to_ns(const struct timeval *tv)
|
2006-01-10 11:52:30 +07:00
|
|
|
{
|
2006-03-26 16:38:11 +07:00
|
|
|
return ((s64) tv->tv_sec * NSEC_PER_SEC) +
|
2006-01-10 11:52:30 +07:00
|
|
|
tv->tv_usec * NSEC_PER_USEC;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ns_to_timespec - Convert nanoseconds to timespec
|
|
|
|
* @nsec: the nanoseconds value to be converted
|
|
|
|
*
|
|
|
|
* Returns the timespec representation of the nsec parameter.
|
|
|
|
*/
|
2006-03-26 16:38:11 +07:00
|
|
|
extern struct timespec ns_to_timespec(const s64 nsec);
|
2006-01-10 11:52:30 +07:00
|
|
|
|
|
|
|
/**
|
|
|
|
* ns_to_timeval - Convert nanoseconds to timeval
|
|
|
|
* @nsec: the nanoseconds value to be converted
|
|
|
|
*
|
|
|
|
* Returns the timeval representation of the nsec parameter.
|
|
|
|
*/
|
2006-03-26 16:38:11 +07:00
|
|
|
extern struct timeval ns_to_timeval(const s64 nsec);
|
2006-01-10 11:52:30 +07:00
|
|
|
|
2006-06-26 14:25:08 +07:00
|
|
|
/**
|
|
|
|
* timespec_add_ns - Adds nanoseconds to a timespec
|
|
|
|
* @a: pointer to timespec to be incremented
|
|
|
|
* @ns: unsigned nanoseconds value to be added
|
|
|
|
*/
|
|
|
|
static inline void timespec_add_ns(struct timespec *a, u64 ns)
|
|
|
|
{
|
|
|
|
ns += a->tv_nsec;
|
|
|
|
while(unlikely(ns >= NSEC_PER_SEC)) {
|
|
|
|
ns -= NSEC_PER_SEC;
|
|
|
|
a->tv_sec++;
|
|
|
|
}
|
|
|
|
a->tv_nsec = ns;
|
|
|
|
}
|
2005-04-17 05:20:36 +07:00
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
|
|
|
|
#define NFDBITS __NFDBITS
|
|
|
|
|
|
|
|
#define FD_SETSIZE __FD_SETSIZE
|
|
|
|
#define FD_SET(fd,fdsetp) __FD_SET(fd,fdsetp)
|
|
|
|
#define FD_CLR(fd,fdsetp) __FD_CLR(fd,fdsetp)
|
|
|
|
#define FD_ISSET(fd,fdsetp) __FD_ISSET(fd,fdsetp)
|
|
|
|
#define FD_ZERO(fdsetp) __FD_ZERO(fdsetp)
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Names of the interval timers, and structure
|
2006-01-10 11:52:26 +07:00
|
|
|
* defining a timer setting:
|
2005-04-17 05:20:36 +07:00
|
|
|
*/
|
2006-01-10 11:52:26 +07:00
|
|
|
#define ITIMER_REAL 0
|
|
|
|
#define ITIMER_VIRTUAL 1
|
|
|
|
#define ITIMER_PROF 2
|
2005-04-17 05:20:36 +07:00
|
|
|
|
2006-01-10 11:52:26 +07:00
|
|
|
struct itimerspec {
|
|
|
|
struct timespec it_interval; /* timer period */
|
|
|
|
struct timespec it_value; /* timer expiration */
|
2005-04-17 05:20:36 +07:00
|
|
|
};
|
|
|
|
|
2006-01-10 11:52:26 +07:00
|
|
|
struct itimerval {
|
|
|
|
struct timeval it_interval; /* timer interval */
|
|
|
|
struct timeval it_value; /* current value */
|
2005-04-17 05:20:36 +07:00
|
|
|
};
|
|
|
|
|
|
|
|
/*
|
2006-01-10 11:52:26 +07:00
|
|
|
* The IDs of the various system clocks (for POSIX.1b interval timers):
|
2005-04-17 05:20:36 +07:00
|
|
|
*/
|
2006-01-10 11:52:25 +07:00
|
|
|
#define CLOCK_REALTIME 0
|
|
|
|
#define CLOCK_MONOTONIC 1
|
|
|
|
#define CLOCK_PROCESS_CPUTIME_ID 2
|
|
|
|
#define CLOCK_THREAD_CPUTIME_ID 3
|
2005-04-17 05:20:36 +07:00
|
|
|
|
|
|
|
/*
|
2006-01-10 11:52:26 +07:00
|
|
|
* The IDs of various hardware clocks:
|
2005-04-17 05:20:36 +07:00
|
|
|
*/
|
2006-01-10 11:52:25 +07:00
|
|
|
#define CLOCK_SGI_CYCLE 10
|
|
|
|
#define MAX_CLOCKS 16
|
|
|
|
#define CLOCKS_MASK (CLOCK_REALTIME | CLOCK_MONOTONIC)
|
|
|
|
#define CLOCKS_MONO CLOCK_MONOTONIC
|
2005-04-17 05:20:36 +07:00
|
|
|
|
|
|
|
/*
|
2006-01-10 11:52:26 +07:00
|
|
|
* The various flags for setting POSIX.1b interval timers:
|
2005-04-17 05:20:36 +07:00
|
|
|
*/
|
2006-01-10 11:52:25 +07:00
|
|
|
#define TIMER_ABSTIME 0x01
|
2005-04-17 05:20:36 +07:00
|
|
|
|
|
|
|
#endif
|