mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
Pull misc compat stuff updates from Al Viro: "This part is basically untangling various compat stuff. Compat syscalls moved to their native counterparts, getting rid of quite a bit of double-copying and/or set_fs() uses. A lot of field-by-field copyin/copyout killed off. - kernel/compat.c is much closer to containing just the copyin/copyout of compat structs. Not all compat syscalls are gone from it yet, but it's getting there. - ipc/compat_mq.c killed off completely. - block/compat_ioctl.c cleaned up; floppy compat ioctls moved to drivers/block/floppy.c where they belong. Yes, there are several drivers that implement some of the same ioctls. Some are m68k and one is 32bit-only pmac. drivers/block/floppy.c is the only one in that bunch that can be built on biarch" * 'misc.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: mqueue: move compat syscalls to native ones usbdevfs: get rid of field-by-field copyin compat_hdio_ioctl: get rid of set_fs() take floppy compat ioctls to sodding floppy.c ipmi: get rid of field-by-field __get_user() ipmi: get COMPAT_IPMICTL_RECEIVE_MSG in sync with the native one rt_sigtimedwait(): move compat to native select: switch compat_{get,put}_fd_set() to compat_{get,put}_bitmap() put_compat_rusage(): switch to copy_to_user() sigpending(): move compat to native getrlimit()/setrlimit(): move compat to native times(2): move compat to native compat_{get,put}_bitmap(): use unsafe_{get,put}_user() fb_get_fscreeninfo(): don't bother with do_fb_ioctl() do_sigaltstack(): lift copying to/from userland into callers take compat_sys_old_getrlimit() to native syscall trim __ARCH_WANT_SYS_OLD_GETRLIMIT
288 lines
8.1 KiB
C
288 lines
8.1 KiB
C
#ifndef _LINUX_TIME_H
|
|
#define _LINUX_TIME_H
|
|
|
|
# include <linux/cache.h>
|
|
# include <linux/seqlock.h>
|
|
# include <linux/math64.h>
|
|
# include <linux/time64.h>
|
|
|
|
extern struct timezone sys_tz;
|
|
|
|
int get_timespec64(struct timespec64 *ts,
|
|
const struct timespec __user *uts);
|
|
int put_timespec64(const struct timespec64 *ts,
|
|
struct timespec __user *uts);
|
|
int get_itimerspec64(struct itimerspec64 *it,
|
|
const struct itimerspec __user *uit);
|
|
int put_itimerspec64(const struct itimerspec64 *it,
|
|
struct itimerspec __user *uit);
|
|
|
|
#define TIME_T_MAX (time_t)((1UL << ((sizeof(time_t) << 3) - 1)) - 1)
|
|
|
|
static inline int timespec_equal(const struct timespec *a,
|
|
const struct timespec *b)
|
|
{
|
|
return (a->tv_sec == b->tv_sec) && (a->tv_nsec == b->tv_nsec);
|
|
}
|
|
|
|
/*
|
|
* lhs < rhs: return <0
|
|
* lhs == rhs: return 0
|
|
* lhs > rhs: return >0
|
|
*/
|
|
static inline int timespec_compare(const struct timespec *lhs, const struct timespec *rhs)
|
|
{
|
|
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;
|
|
}
|
|
|
|
static inline int timeval_compare(const struct timeval *lhs, const struct timeval *rhs)
|
|
{
|
|
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;
|
|
}
|
|
|
|
extern time64_t mktime64(const unsigned int year, const unsigned int mon,
|
|
const unsigned int day, const unsigned int hour,
|
|
const unsigned int min, const unsigned int sec);
|
|
|
|
/**
|
|
* Deprecated. Use mktime64().
|
|
*/
|
|
static inline 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)
|
|
{
|
|
return mktime64(year, mon, day, hour, min, sec);
|
|
}
|
|
|
|
extern void set_normalized_timespec(struct timespec *ts, time_t sec, s64 nsec);
|
|
|
|
/*
|
|
* timespec_add_safe assumes both values are positive and checks
|
|
* for overflow. It will return TIME_T_MAX if the reutrn would be
|
|
* smaller then either of the arguments.
|
|
*/
|
|
extern struct timespec timespec_add_safe(const struct timespec lhs,
|
|
const struct timespec rhs);
|
|
|
|
|
|
static inline struct timespec timespec_add(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;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
/*
|
|
* Returns true if the timespec is norm, false if denorm:
|
|
*/
|
|
static inline bool timespec_valid(const struct timespec *ts)
|
|
{
|
|
/* Dates before 1970 are bogus */
|
|
if (ts->tv_sec < 0)
|
|
return false;
|
|
/* Can't have more nanoseconds then a second */
|
|
if ((unsigned long)ts->tv_nsec >= NSEC_PER_SEC)
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
static inline bool timespec_valid_strict(const struct timespec *ts)
|
|
{
|
|
if (!timespec_valid(ts))
|
|
return false;
|
|
/* Disallow values that could overflow ktime_t */
|
|
if ((unsigned long long)ts->tv_sec >= KTIME_SEC_MAX)
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
static inline bool timeval_valid(const struct timeval *tv)
|
|
{
|
|
/* Dates before 1970 are bogus */
|
|
if (tv->tv_sec < 0)
|
|
return false;
|
|
|
|
/* Can't have more microseconds then a second */
|
|
if (tv->tv_usec < 0 || tv->tv_usec >= USEC_PER_SEC)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
extern struct timespec timespec_trunc(struct timespec t, unsigned gran);
|
|
|
|
/*
|
|
* Validates if a timespec/timeval used to inject a time offset is valid.
|
|
* Offsets can be postive or negative. The value of the timeval/timespec
|
|
* is the sum of its fields, but *NOTE*: the field tv_usec/tv_nsec must
|
|
* always be non-negative.
|
|
*/
|
|
static inline bool timeval_inject_offset_valid(const struct timeval *tv)
|
|
{
|
|
/* We don't check the tv_sec as it can be positive or negative */
|
|
|
|
/* Can't have more microseconds then a second */
|
|
if (tv->tv_usec < 0 || tv->tv_usec >= USEC_PER_SEC)
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
static inline bool timespec_inject_offset_valid(const struct timespec *ts)
|
|
{
|
|
/* We don't check the tv_sec as it can be positive or negative */
|
|
|
|
/* Can't have more nanoseconds then a second */
|
|
if (ts->tv_nsec < 0 || ts->tv_nsec >= NSEC_PER_SEC)
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
/* Some architectures do not supply their own clocksource.
|
|
* This is mainly the case in architectures that get their
|
|
* inter-tick times by reading the counter on their interval
|
|
* timer. Since these timers wrap every tick, they're not really
|
|
* useful as clocksources. Wrapping them to act like one is possible
|
|
* but not very efficient. So we provide a callout these arches
|
|
* can implement for use with the jiffies clocksource to provide
|
|
* finer then tick granular time.
|
|
*/
|
|
#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET
|
|
extern u32 (*arch_gettimeoffset)(void);
|
|
#endif
|
|
|
|
struct itimerval;
|
|
extern int do_setitimer(int which, struct itimerval *value,
|
|
struct itimerval *ovalue);
|
|
extern int do_getitimer(int which, struct itimerval *value);
|
|
|
|
extern long do_utimes(int dfd, const char __user *filename, struct timespec *times, int flags);
|
|
|
|
/*
|
|
* Similar to the struct tm in userspace <time.h>, but it needs to be here so
|
|
* that the kernel source is self contained.
|
|
*/
|
|
struct tm {
|
|
/*
|
|
* the number of seconds after the minute, normally in the range
|
|
* 0 to 59, but can be up to 60 to allow for leap seconds
|
|
*/
|
|
int tm_sec;
|
|
/* the number of minutes after the hour, in the range 0 to 59*/
|
|
int tm_min;
|
|
/* the number of hours past midnight, in the range 0 to 23 */
|
|
int tm_hour;
|
|
/* the day of the month, in the range 1 to 31 */
|
|
int tm_mday;
|
|
/* the number of months since January, in the range 0 to 11 */
|
|
int tm_mon;
|
|
/* the number of years since 1900 */
|
|
long tm_year;
|
|
/* the number of days since Sunday, in the range 0 to 6 */
|
|
int tm_wday;
|
|
/* the number of days since January 1, in the range 0 to 365 */
|
|
int tm_yday;
|
|
};
|
|
|
|
void time64_to_tm(time64_t totalsecs, int offset, struct tm *result);
|
|
|
|
/**
|
|
* time_to_tm - converts the calendar time to local broken-down time
|
|
*
|
|
* @totalsecs the number of seconds elapsed since 00:00:00 on January 1, 1970,
|
|
* Coordinated Universal Time (UTC).
|
|
* @offset offset seconds adding to totalsecs.
|
|
* @result pointer to struct tm variable to receive broken-down time
|
|
*/
|
|
static inline void time_to_tm(time_t totalsecs, int offset, struct tm *result)
|
|
{
|
|
time64_to_tm(totalsecs, offset, result);
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
static inline s64 timespec_to_ns(const struct timespec *ts)
|
|
{
|
|
return ((s64) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec;
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
static inline s64 timeval_to_ns(const struct timeval *tv)
|
|
{
|
|
return ((s64) tv->tv_sec * NSEC_PER_SEC) +
|
|
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.
|
|
*/
|
|
extern struct timespec ns_to_timespec(const s64 nsec);
|
|
|
|
/**
|
|
* ns_to_timeval - Convert nanoseconds to timeval
|
|
* @nsec: the nanoseconds value to be converted
|
|
*
|
|
* Returns the timeval representation of the nsec parameter.
|
|
*/
|
|
extern struct timeval ns_to_timeval(const s64 nsec);
|
|
|
|
/**
|
|
* timespec_add_ns - Adds nanoseconds to a timespec
|
|
* @a: pointer to timespec to be incremented
|
|
* @ns: unsigned nanoseconds value to be added
|
|
*
|
|
* This must always be inlined because its used from the x86-64 vdso,
|
|
* which cannot call other kernel functions.
|
|
*/
|
|
static __always_inline void timespec_add_ns(struct timespec *a, u64 ns)
|
|
{
|
|
a->tv_sec += __iter_div_u64_rem(a->tv_nsec + ns, NSEC_PER_SEC, &ns);
|
|
a->tv_nsec = ns;
|
|
}
|
|
|
|
static inline bool itimerspec64_valid(const struct itimerspec64 *its)
|
|
{
|
|
if (!timespec64_valid(&(its->it_interval)) ||
|
|
!timespec64_valid(&(its->it_value)))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
#endif
|