diff options
Diffstat (limited to 'kernel/time/time.c')
| -rw-r--r-- | kernel/time/time.c | 443 |
1 files changed, 290 insertions, 153 deletions
diff --git a/kernel/time/time.c b/kernel/time/time.c index 2edb5088a70b..0ba8e3c50d62 100644 --- a/kernel/time/time.c +++ b/kernel/time/time.c @@ -59,9 +59,9 @@ EXPORT_SYMBOL(sys_tz); * why not move it into the appropriate arch directory (for those * architectures that need it). */ -SYSCALL_DEFINE1(time, time_t __user *, tloc) +SYSCALL_DEFINE1(time, __kernel_old_time_t __user *, tloc) { - time_t i = (time_t)ktime_get_real_seconds(); + __kernel_old_time_t i = (__kernel_old_time_t)ktime_get_real_seconds(); if (tloc) { if (put_user(i,tloc)) @@ -78,7 +78,7 @@ SYSCALL_DEFINE1(time, time_t __user *, tloc) * architectures that need it). */ -SYSCALL_DEFINE1(stime, time_t __user *, tptr) +SYSCALL_DEFINE1(stime, __kernel_old_time_t __user *, tptr) { struct timespec64 tv; int err; @@ -98,11 +98,11 @@ SYSCALL_DEFINE1(stime, time_t __user *, tptr) #endif /* __ARCH_WANT_SYS_TIME */ -#ifdef CONFIG_COMPAT -#ifdef __ARCH_WANT_COMPAT_SYS_TIME +#ifdef CONFIG_COMPAT_32BIT_TIME +#ifdef __ARCH_WANT_SYS_TIME32 /* old_time32_t is a 32 bit "long" and needs to get converted. */ -COMPAT_SYSCALL_DEFINE1(time, old_time32_t __user *, tloc) +SYSCALL_DEFINE1(time32, old_time32_t __user *, tloc) { old_time32_t i; @@ -116,7 +116,7 @@ COMPAT_SYSCALL_DEFINE1(time, old_time32_t __user *, tloc) return i; } -COMPAT_SYSCALL_DEFINE1(stime, old_time32_t __user *, tptr) +SYSCALL_DEFINE1(stime32, old_time32_t __user *, tptr) { struct timespec64 tv; int err; @@ -134,10 +134,10 @@ COMPAT_SYSCALL_DEFINE1(stime, old_time32_t __user *, tptr) return 0; } -#endif /* __ARCH_WANT_COMPAT_SYS_TIME */ +#endif /* __ARCH_WANT_SYS_TIME32 */ #endif -SYSCALL_DEFINE2(gettimeofday, struct timeval __user *, tv, +SYSCALL_DEFINE2(gettimeofday, struct __kernel_old_timeval __user *, tv, struct timezone __user *, tz) { if (likely(tv != NULL)) { @@ -171,7 +171,7 @@ int do_sys_settimeofday64(const struct timespec64 *tv, const struct timezone *tz static int firsttime = 1; int error = 0; - if (tv && !timespec64_valid(tv)) + if (tv && !timespec64_valid_settod(tv)) return -EINVAL; error = security_settime64(tv, tz); @@ -179,7 +179,7 @@ int do_sys_settimeofday64(const struct timespec64 *tv, const struct timezone *tz return error; if (tz) { - /* Verify we're witin the +-15 hrs range */ + /* Verify we're within the +-15 hrs range */ if (tz->tz_minuteswest > 15*60 || tz->tz_minuteswest < -15*60) return -EINVAL; @@ -196,22 +196,21 @@ int do_sys_settimeofday64(const struct timespec64 *tv, const struct timezone *tz return 0; } -SYSCALL_DEFINE2(settimeofday, struct timeval __user *, tv, +SYSCALL_DEFINE2(settimeofday, struct __kernel_old_timeval __user *, tv, struct timezone __user *, tz) { struct timespec64 new_ts; - struct timeval user_tv; struct timezone new_tz; if (tv) { - if (copy_from_user(&user_tv, tv, sizeof(*tv))) + if (get_user(new_ts.tv_sec, &tv->tv_sec) || + get_user(new_ts.tv_nsec, &tv->tv_usec)) return -EFAULT; - if (!timeval_valid(&user_tv)) + if (new_ts.tv_nsec > USEC_PER_SEC || new_ts.tv_nsec < 0) return -EINVAL; - new_ts.tv_sec = user_tv.tv_sec; - new_ts.tv_nsec = user_tv.tv_usec * NSEC_PER_USEC; + new_ts.tv_nsec *= NSEC_PER_USEC; } if (tz) { if (copy_from_user(&new_tz, tz, sizeof(*tz))) @@ -245,14 +244,17 @@ COMPAT_SYSCALL_DEFINE2(settimeofday, struct old_timeval32 __user *, tv, struct timezone __user *, tz) { struct timespec64 new_ts; - struct timeval user_tv; struct timezone new_tz; if (tv) { - if (compat_get_timeval(&user_tv, tv)) + if (get_user(new_ts.tv_sec, &tv->tv_sec) || + get_user(new_ts.tv_nsec, &tv->tv_usec)) return -EFAULT; - new_ts.tv_sec = user_tv.tv_sec; - new_ts.tv_nsec = user_tv.tv_usec * NSEC_PER_USEC; + + if (new_ts.tv_nsec > USEC_PER_SEC || new_ts.tv_nsec < 0) + return -EINVAL; + + new_ts.tv_nsec *= NSEC_PER_USEC; } if (tz) { if (copy_from_user(&new_tz, tz, sizeof(*tz))) @@ -263,35 +265,99 @@ COMPAT_SYSCALL_DEFINE2(settimeofday, struct old_timeval32 __user *, tv, } #endif -SYSCALL_DEFINE1(adjtimex, struct timex __user *, txc_p) +#ifdef CONFIG_64BIT +SYSCALL_DEFINE1(adjtimex, struct __kernel_timex __user *, txc_p) { - struct timex txc; /* Local copy of parameter */ + struct __kernel_timex txc; /* Local copy of parameter */ int ret; /* Copy the user data space into the kernel copy * structure. But bear in mind that the structures * may change */ - if (copy_from_user(&txc, txc_p, sizeof(struct timex))) + if (copy_from_user(&txc, txc_p, sizeof(struct __kernel_timex))) return -EFAULT; ret = do_adjtimex(&txc); - return copy_to_user(txc_p, &txc, sizeof(struct timex)) ? -EFAULT : ret; + return copy_to_user(txc_p, &txc, sizeof(struct __kernel_timex)) ? -EFAULT : ret; } +#endif -#ifdef CONFIG_COMPAT +#ifdef CONFIG_COMPAT_32BIT_TIME +int get_old_timex32(struct __kernel_timex *txc, const struct old_timex32 __user *utp) +{ + struct old_timex32 tx32; + + memset(txc, 0, sizeof(struct __kernel_timex)); + if (copy_from_user(&tx32, utp, sizeof(struct old_timex32))) + return -EFAULT; + + txc->modes = tx32.modes; + txc->offset = tx32.offset; + txc->freq = tx32.freq; + txc->maxerror = tx32.maxerror; + txc->esterror = tx32.esterror; + txc->status = tx32.status; + txc->constant = tx32.constant; + txc->precision = tx32.precision; + txc->tolerance = tx32.tolerance; + txc->time.tv_sec = tx32.time.tv_sec; + txc->time.tv_usec = tx32.time.tv_usec; + txc->tick = tx32.tick; + txc->ppsfreq = tx32.ppsfreq; + txc->jitter = tx32.jitter; + txc->shift = tx32.shift; + txc->stabil = tx32.stabil; + txc->jitcnt = tx32.jitcnt; + txc->calcnt = tx32.calcnt; + txc->errcnt = tx32.errcnt; + txc->stbcnt = tx32.stbcnt; -COMPAT_SYSCALL_DEFINE1(adjtimex, struct compat_timex __user *, utp) + return 0; +} + +int put_old_timex32(struct old_timex32 __user *utp, const struct __kernel_timex *txc) { - struct timex txc; + struct old_timex32 tx32; + + memset(&tx32, 0, sizeof(struct old_timex32)); + tx32.modes = txc->modes; + tx32.offset = txc->offset; + tx32.freq = txc->freq; + tx32.maxerror = txc->maxerror; + tx32.esterror = txc->esterror; + tx32.status = txc->status; + tx32.constant = txc->constant; + tx32.precision = txc->precision; + tx32.tolerance = txc->tolerance; + tx32.time.tv_sec = txc->time.tv_sec; + tx32.time.tv_usec = txc->time.tv_usec; + tx32.tick = txc->tick; + tx32.ppsfreq = txc->ppsfreq; + tx32.jitter = txc->jitter; + tx32.shift = txc->shift; + tx32.stabil = txc->stabil; + tx32.jitcnt = txc->jitcnt; + tx32.calcnt = txc->calcnt; + tx32.errcnt = txc->errcnt; + tx32.stbcnt = txc->stbcnt; + tx32.tai = txc->tai; + if (copy_to_user(utp, &tx32, sizeof(struct old_timex32))) + return -EFAULT; + return 0; +} + +SYSCALL_DEFINE1(adjtimex_time32, struct old_timex32 __user *, utp) +{ + struct __kernel_timex txc; int err, ret; - err = compat_get_timex(&txc, utp); + err = get_old_timex32(&txc, utp); if (err) return err; ret = do_adjtimex(&txc); - err = compat_put_timex(utp, &txc); + err = put_old_timex32(utp, &txc); if (err) return err; @@ -299,11 +365,14 @@ COMPAT_SYSCALL_DEFINE1(adjtimex, struct compat_timex __user *, utp) } #endif -/* - * Convert jiffies to milliseconds and back. +/** + * jiffies_to_msecs - Convert jiffies to milliseconds + * @j: jiffies value * * Avoid unnecessary multiplications/divisions in the - * two most common HZ cases: + * two most common HZ cases. + * + * Return: milliseconds value */ unsigned int jiffies_to_msecs(const unsigned long j) { @@ -322,6 +391,12 @@ unsigned int jiffies_to_msecs(const unsigned long j) } EXPORT_SYMBOL(jiffies_to_msecs); +/** + * jiffies_to_usecs - Convert jiffies to microseconds + * @j: jiffies value + * + * Return: microseconds value + */ unsigned int jiffies_to_usecs(const unsigned long j) { /* @@ -342,8 +417,15 @@ unsigned int jiffies_to_usecs(const unsigned long j) } EXPORT_SYMBOL(jiffies_to_usecs); -/* +/** * mktime64 - Converts date to seconds. + * @year0: year to convert + * @mon0: month to convert + * @day: day to convert + * @hour: hour to convert + * @min: minute to convert + * @sec: second to convert + * * Converts Gregorian date to seconds since 1970-01-01 00:00:00. * Assumes input in normal date format, i.e. 1980-12-31 23:59:59 * => year=1980, mon=12, day=31, hour=23, min=59, sec=59. @@ -361,6 +443,8 @@ EXPORT_SYMBOL(jiffies_to_usecs); * * An encoding of midnight at the end of the day as 24:00:00 - ie. midnight * tomorrow - (allowable under ISO 8601) is supported. + * + * Return: seconds since the epoch time for the given input date */ time64_t mktime64(const unsigned int year0, const unsigned int mon0, const unsigned int day, const unsigned int hour, @@ -383,50 +467,7 @@ time64_t mktime64(const unsigned int year0, const unsigned int mon0, } EXPORT_SYMBOL(mktime64); -/** - * ns_to_timespec - Convert nanoseconds to timespec - * @nsec: the nanoseconds value to be converted - * - * Returns the timespec representation of the nsec parameter. - */ -struct timespec ns_to_timespec(const s64 nsec) -{ - struct timespec ts; - s32 rem; - - if (!nsec) - return (struct timespec) {0, 0}; - - ts.tv_sec = div_s64_rem(nsec, NSEC_PER_SEC, &rem); - if (unlikely(rem < 0)) { - ts.tv_sec--; - rem += NSEC_PER_SEC; - } - ts.tv_nsec = rem; - - return ts; -} -EXPORT_SYMBOL(ns_to_timespec); - -/** - * ns_to_timeval - Convert nanoseconds to timeval - * @nsec: the nanoseconds value to be converted - * - * Returns the timeval representation of the nsec parameter. - */ -struct timeval ns_to_timeval(const s64 nsec) -{ - struct timespec ts = ns_to_timespec(nsec); - struct timeval tv; - - tv.tv_sec = ts.tv_sec; - tv.tv_usec = (suseconds_t) ts.tv_nsec / 1000; - - return tv; -} -EXPORT_SYMBOL(ns_to_timeval); - -struct __kernel_old_timeval ns_to_kernel_old_timeval(const s64 nsec) +struct __kernel_old_timeval ns_to_kernel_old_timeval(s64 nsec) { struct timespec64 ts = ns_to_timespec64(nsec); struct __kernel_old_timeval tv; @@ -439,7 +480,7 @@ struct __kernel_old_timeval ns_to_kernel_old_timeval(const s64 nsec) EXPORT_SYMBOL(ns_to_kernel_old_timeval); /** - * set_normalized_timespec - set timespec sec and nsec parts and normalize + * set_normalized_timespec64 - set timespec sec and nsec parts and normalize * * @ts: pointer to timespec variable to be set * @sec: seconds to set @@ -448,8 +489,7 @@ EXPORT_SYMBOL(ns_to_kernel_old_timeval); * Set seconds and nanoseconds field of a timespec variable and * normalize to the timespec storage format * - * Note: The tv_nsec part is always in the range of - * 0 <= tv_nsec < NSEC_PER_SEC + * Note: The tv_nsec part is always in the range of 0 <= tv_nsec < NSEC_PER_SEC. * For negative values only the tv_sec field is negative ! */ void set_normalized_timespec64(struct timespec64 *ts, time64_t sec, s64 nsec) @@ -478,29 +518,32 @@ EXPORT_SYMBOL(set_normalized_timespec64); * ns_to_timespec64 - Convert nanoseconds to timespec64 * @nsec: the nanoseconds value to be converted * - * Returns the timespec64 representation of the nsec parameter. + * Return: the timespec64 representation of the nsec parameter. */ -struct timespec64 ns_to_timespec64(const s64 nsec) +struct timespec64 ns_to_timespec64(s64 nsec) { - struct timespec64 ts; + struct timespec64 ts = { 0, 0 }; s32 rem; - if (!nsec) - return (struct timespec64) {0, 0}; - - ts.tv_sec = div_s64_rem(nsec, NSEC_PER_SEC, &rem); - if (unlikely(rem < 0)) { - ts.tv_sec--; - rem += NSEC_PER_SEC; + if (likely(nsec > 0)) { + ts.tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem); + ts.tv_nsec = rem; + } else if (nsec < 0) { + /* + * With negative times, tv_sec points to the earlier + * second, and tv_nsec counts the nanoseconds since + * then, so tv_nsec is always a positive number. + */ + ts.tv_sec = -div_u64_rem(-nsec - 1, NSEC_PER_SEC, &rem) - 1; + ts.tv_nsec = NSEC_PER_SEC - rem - 1; } - ts.tv_nsec = rem; return ts; } EXPORT_SYMBOL(ns_to_timespec64); /** - * msecs_to_jiffies: - convert milliseconds to jiffies + * __msecs_to_jiffies: - convert milliseconds to jiffies * @m: time in milliseconds * * conversion is done as follows: @@ -513,15 +556,17 @@ EXPORT_SYMBOL(ns_to_timespec64); * - all other values are converted to jiffies by either multiplying * the input value by a factor or dividing it with a factor and * handling any 32-bit overflows. - * for the details see __msecs_to_jiffies() + * for the details see _msecs_to_jiffies() * * msecs_to_jiffies() checks for the passed in value being a constant * via __builtin_constant_p() allowing gcc to eliminate most of the * code, __msecs_to_jiffies() is called if the value passed does not * allow constant folding and the actual conversion must be done at * runtime. - * the _msecs_to_jiffies helpers are the HZ dependent conversion + * The _msecs_to_jiffies helpers are the HZ dependent conversion * routines found in include/linux/jiffies.h + * + * Return: jiffies value */ unsigned long __msecs_to_jiffies(const unsigned int m) { @@ -534,6 +579,12 @@ unsigned long __msecs_to_jiffies(const unsigned int m) } EXPORT_SYMBOL(__msecs_to_jiffies); +/** + * __usecs_to_jiffies: - convert microseconds to jiffies + * @u: time in milliseconds + * + * Return: jiffies value + */ unsigned long __usecs_to_jiffies(const unsigned int u) { if (u > jiffies_to_usecs(MAX_JIFFY_OFFSET)) @@ -542,10 +593,13 @@ unsigned long __usecs_to_jiffies(const unsigned int u) } EXPORT_SYMBOL(__usecs_to_jiffies); -/* +/** + * timespec64_to_jiffies - convert a timespec64 value to jiffies + * @value: pointer to &struct timespec64 + * * The TICK_NSEC - 1 rounds up the value to the next resolution. Note * that a remainder subtract here would not do the right thing as the - * resolution values don't fall on second boundries. I.e. the line: + * resolution values don't fall on second boundaries. I.e. the line: * nsec -= nsec % TICK_NSEC; is NOT a correct resolution rounding. * Note that due to the small error in the multiplier here, this * rounding is incorrect for sufficiently large values of tv_nsec, but @@ -556,11 +610,14 @@ EXPORT_SYMBOL(__usecs_to_jiffies); * * The >> (NSEC_JIFFIE_SC - SEC_JIFFIE_SC) converts the scaled nsec * value to a scaled second value. + * + * Return: jiffies value */ -static unsigned long -__timespec64_to_jiffies(u64 sec, long nsec) +unsigned long +timespec64_to_jiffies(const struct timespec64 *value) { - nsec = nsec + TICK_NSEC - 1; + u64 sec = value->tv_sec; + long nsec = value->tv_nsec + TICK_NSEC - 1; if (sec >= MAX_SEC_IN_JIFFIES){ sec = MAX_SEC_IN_JIFFIES; @@ -571,20 +628,13 @@ __timespec64_to_jiffies(u64 sec, long nsec) (NSEC_JIFFIE_SC - SEC_JIFFIE_SC))) >> SEC_JIFFIE_SC; } - -static unsigned long -__timespec_to_jiffies(unsigned long sec, long nsec) -{ - return __timespec64_to_jiffies((u64)sec, nsec); -} - -unsigned long -timespec64_to_jiffies(const struct timespec64 *value) -{ - return __timespec64_to_jiffies(value->tv_sec, value->tv_nsec); -} EXPORT_SYMBOL(timespec64_to_jiffies); +/** + * jiffies_to_timespec64 - convert jiffies value to &struct timespec64 + * @jiffies: jiffies value + * @value: pointer to &struct timespec64 + */ void jiffies_to_timespec64(const unsigned long jiffies, struct timespec64 *value) { @@ -600,45 +650,14 @@ jiffies_to_timespec64(const unsigned long jiffies, struct timespec64 *value) EXPORT_SYMBOL(jiffies_to_timespec64); /* - * We could use a similar algorithm to timespec_to_jiffies (with a - * different multiplier for usec instead of nsec). But this has a - * problem with rounding: we can't exactly add TICK_NSEC - 1 to the - * usec value, since it's not necessarily integral. - * - * We could instead round in the intermediate scaled representation - * (i.e. in units of 1/2^(large scale) jiffies) but that's also - * perilous: the scaling introduces a small positive error, which - * combined with a division-rounding-upward (i.e. adding 2^(scale) - 1 - * units to the intermediate before shifting) leads to accidental - * overflow and overestimates. - * - * At the cost of one additional multiplication by a constant, just - * use the timespec implementation. + * Convert jiffies/jiffies_64 to clock_t and back. */ -unsigned long -timeval_to_jiffies(const struct timeval *value) -{ - return __timespec_to_jiffies(value->tv_sec, - value->tv_usec * NSEC_PER_USEC); -} -EXPORT_SYMBOL(timeval_to_jiffies); -void jiffies_to_timeval(const unsigned long jiffies, struct timeval *value) -{ - /* - * Convert jiffies to nanoseconds and separate with - * one divide. - */ - u32 rem; - - value->tv_sec = div_u64_rem((u64)jiffies * TICK_NSEC, - NSEC_PER_SEC, &rem); - value->tv_usec = rem / NSEC_PER_USEC; -} -EXPORT_SYMBOL(jiffies_to_timeval); - -/* - * Convert jiffies/jiffies_64 to clock_t and back. +/** + * jiffies_to_clock_t - Convert jiffies to clock_t + * @x: jiffies value + * + * Return: jiffies converted to clock_t (CLOCKS_PER_SEC) */ clock_t jiffies_to_clock_t(unsigned long x) { @@ -654,6 +673,12 @@ clock_t jiffies_to_clock_t(unsigned long x) } EXPORT_SYMBOL(jiffies_to_clock_t); +/** + * clock_t_to_jiffies - Convert clock_t to jiffies + * @x: clock_t value + * + * Return: clock_t value converted to jiffies + */ unsigned long clock_t_to_jiffies(unsigned long x) { #if (HZ % USER_HZ)==0 @@ -671,6 +696,12 @@ unsigned long clock_t_to_jiffies(unsigned long x) } EXPORT_SYMBOL(clock_t_to_jiffies); +/** + * jiffies_64_to_clock_t - Convert jiffies_64 to clock_t + * @x: jiffies_64 value + * + * Return: jiffies_64 value converted to 64-bit "clock_t" (CLOCKS_PER_SEC) + */ u64 jiffies_64_to_clock_t(u64 x) { #if (TICK_NSEC % (NSEC_PER_SEC / USER_HZ)) == 0 @@ -693,6 +724,12 @@ u64 jiffies_64_to_clock_t(u64 x) } EXPORT_SYMBOL(jiffies_64_to_clock_t); +/** + * nsec_to_clock_t - Convert nsec value to clock_t + * @x: nsec value + * + * Return: nsec value converted to 64-bit "clock_t" (CLOCKS_PER_SEC) + */ u64 nsec_to_clock_t(u64 x) { #if (NSEC_PER_SEC % USER_HZ) == 0 @@ -709,6 +746,12 @@ u64 nsec_to_clock_t(u64 x) #endif } +/** + * jiffies64_to_nsecs - Convert jiffies64 to nanoseconds + * @j: jiffies64 value + * + * Return: nanoseconds value + */ u64 jiffies64_to_nsecs(u64 j) { #if !(NSEC_PER_SEC % HZ) @@ -720,6 +763,22 @@ u64 jiffies64_to_nsecs(u64 j) EXPORT_SYMBOL(jiffies64_to_nsecs); /** + * jiffies64_to_msecs - Convert jiffies64 to milliseconds + * @j: jiffies64 value + * + * Return: milliseconds value + */ +u64 jiffies64_to_msecs(const u64 j) +{ +#if HZ <= MSEC_PER_SEC && !(MSEC_PER_SEC % HZ) + return (MSEC_PER_SEC / HZ) * j; +#else + return div_u64(j * HZ_TO_MSEC_NUM, HZ_TO_MSEC_DEN); +#endif +} +EXPORT_SYMBOL(jiffies64_to_msecs); + +/** * nsecs_to_jiffies64 - Convert nsecs in u64 to jiffies64 * * @n: nsecs in u64 @@ -731,6 +790,8 @@ EXPORT_SYMBOL(jiffies64_to_nsecs); * note: * NSEC_PER_SEC = 10^9 = (5^9 * 2^9) = (1953125 * 512) * ULLONG_MAX ns = 18446744073.709551615 secs = about 584 years + * + * Return: nsecs converted to jiffies64 value */ u64 nsecs_to_jiffies64(u64 n) { @@ -762,6 +823,8 @@ EXPORT_SYMBOL(nsecs_to_jiffies64); * note: * NSEC_PER_SEC = 10^9 = (5^9 * 2^9) = (1953125 * 512) * ULLONG_MAX ns = 18446744073.709551615 secs = about 584 years + * + * Return: nsecs converted to jiffies value */ unsigned long nsecs_to_jiffies(u64 n) { @@ -769,10 +832,16 @@ unsigned long nsecs_to_jiffies(u64 n) } EXPORT_SYMBOL_GPL(nsecs_to_jiffies); -/* - * Add two timespec64 values and do a safety check for overflow. +/** + * timespec64_add_safe - Add two timespec64 values and do a safety check + * for overflow. + * @lhs: first (left) timespec64 to add + * @rhs: second (right) timespec64 to add + * * It's assumed that both values are valid (>= 0). * And, each timespec64 is in normalized form. + * + * Return: sum of @lhs + @rhs */ struct timespec64 timespec64_add_safe(const struct timespec64 lhs, const struct timespec64 rhs) @@ -789,7 +858,17 @@ struct timespec64 timespec64_add_safe(const struct timespec64 lhs, return res; } +EXPORT_SYMBOL_GPL(timespec64_add_safe); +/** + * get_timespec64 - get user's time value into kernel space + * @ts: destination &struct timespec64 + * @uts: user's time value as &struct __kernel_timespec + * + * Handles compat or 32-bit modes. + * + * Return: 0 on success or negative errno on error + */ int get_timespec64(struct timespec64 *ts, const struct __kernel_timespec __user *uts) { @@ -802,16 +881,25 @@ int get_timespec64(struct timespec64 *ts, ts->tv_sec = kts.tv_sec; - /* Zero out the padding for 32 bit systems or in compat mode */ - if (IS_ENABLED(CONFIG_64BIT_TIME) && in_compat_syscall()) + /* Zero out the padding in compat mode */ + if (in_compat_syscall()) kts.tv_nsec &= 0xFFFFFFFFUL; + /* In 32-bit mode, this drops the padding */ ts->tv_nsec = kts.tv_nsec; return 0; } EXPORT_SYMBOL_GPL(get_timespec64); +/** + * put_timespec64 - convert timespec64 value to __kernel_timespec format and + * copy the latter to userspace + * @ts: input &struct timespec64 + * @uts: user's &struct __kernel_timespec + * + * Return: 0 on success or negative errno on error + */ int put_timespec64(const struct timespec64 *ts, struct __kernel_timespec __user *uts) { @@ -850,6 +938,15 @@ static int __put_old_timespec32(const struct timespec64 *ts64, return copy_to_user(cts, &ts, sizeof(ts)) ? -EFAULT : 0; } +/** + * get_old_timespec32 - get user's old-format time value into kernel space + * @ts: destination &struct timespec64 + * @uts: user's old-format time value (&struct old_timespec32) + * + * Handles X86_X32_ABI compatibility conversion. + * + * Return: 0 on success or negative errno on error + */ int get_old_timespec32(struct timespec64 *ts, const void __user *uts) { if (COMPAT_USE_64BIT_TIME) @@ -859,6 +956,16 @@ int get_old_timespec32(struct timespec64 *ts, const void __user *uts) } EXPORT_SYMBOL_GPL(get_old_timespec32); +/** + * put_old_timespec32 - convert timespec64 value to &struct old_timespec32 and + * copy the latter to userspace + * @ts: input &struct timespec64 + * @uts: user's &struct old_timespec32 + * + * Handles X86_X32_ABI compatibility conversion. + * + * Return: 0 on success or negative errno on error + */ int put_old_timespec32(const struct timespec64 *ts, void __user *uts) { if (COMPAT_USE_64BIT_TIME) @@ -868,6 +975,13 @@ int put_old_timespec32(const struct timespec64 *ts, void __user *uts) } EXPORT_SYMBOL_GPL(put_old_timespec32); +/** + * get_itimerspec64 - get user's &struct __kernel_itimerspec into kernel space + * @it: destination &struct itimerspec64 + * @uit: user's &struct __kernel_itimerspec + * + * Return: 0 on success or negative errno on error + */ int get_itimerspec64(struct itimerspec64 *it, const struct __kernel_itimerspec __user *uit) { @@ -883,6 +997,14 @@ int get_itimerspec64(struct itimerspec64 *it, } EXPORT_SYMBOL_GPL(get_itimerspec64); +/** + * put_itimerspec64 - convert &struct itimerspec64 to __kernel_itimerspec format + * and copy the latter to userspace + * @it: input &struct itimerspec64 + * @uit: user's &struct __kernel_itimerspec + * + * Return: 0 on success or negative errno on error + */ int put_itimerspec64(const struct itimerspec64 *it, struct __kernel_itimerspec __user *uit) { @@ -898,6 +1020,13 @@ int put_itimerspec64(const struct itimerspec64 *it, } EXPORT_SYMBOL_GPL(put_itimerspec64); +/** + * get_old_itimerspec32 - get user's &struct old_itimerspec32 into kernel space + * @its: destination &struct itimerspec64 + * @uits: user's &struct old_itimerspec32 + * + * Return: 0 on success or negative errno on error + */ int get_old_itimerspec32(struct itimerspec64 *its, const struct old_itimerspec32 __user *uits) { @@ -909,6 +1038,14 @@ int get_old_itimerspec32(struct itimerspec64 *its, } EXPORT_SYMBOL_GPL(get_old_itimerspec32); +/** + * put_old_itimerspec32 - convert &struct itimerspec64 to &struct + * old_itimerspec32 and copy the latter to userspace + * @its: input &struct itimerspec64 + * @uits: user's &struct old_itimerspec32 + * + * Return: 0 on success or negative errno on error + */ int put_old_itimerspec32(const struct itimerspec64 *its, struct old_itimerspec32 __user *uits) { |