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author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-05 14:08:26 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-05 14:08:26 -0800 |
commit | b1b988a6a035212f5ea205155c49ce449beedee8 (patch) | |
tree | af28071cdede91fe92471c45718d56add3fafab4 /kernel/time/time.c | |
parent | edaed168e135f8ec87b27b567a367cbb041f2243 (diff) | |
parent | cfbe271667b7aba03b403aee916ccd457409d2e8 (diff) | |
download | linux-b1b988a6a035212f5ea205155c49ce449beedee8.tar.bz2 |
Merge branch 'timers-2038-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull year 2038 updates from Thomas Gleixner:
"Another round of changes to make the kernel ready for 2038. After lots
of preparatory work this is the first set of syscalls which are 2038
safe:
403 clock_gettime64
404 clock_settime64
405 clock_adjtime64
406 clock_getres_time64
407 clock_nanosleep_time64
408 timer_gettime64
409 timer_settime64
410 timerfd_gettime64
411 timerfd_settime64
412 utimensat_time64
413 pselect6_time64
414 ppoll_time64
416 io_pgetevents_time64
417 recvmmsg_time64
418 mq_timedsend_time64
419 mq_timedreceiv_time64
420 semtimedop_time64
421 rt_sigtimedwait_time64
422 futex_time64
423 sched_rr_get_interval_time64
The syscall numbers are identical all over the architectures"
* 'timers-2038-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (36 commits)
riscv: Use latest system call ABI
checksyscalls: fix up mq_timedreceive and stat exceptions
unicore32: Fix __ARCH_WANT_STAT64 definition
asm-generic: Make time32 syscall numbers optional
asm-generic: Drop getrlimit and setrlimit syscalls from default list
32-bit userspace ABI: introduce ARCH_32BIT_OFF_T config option
compat ABI: use non-compat openat and open_by_handle_at variants
y2038: add 64-bit time_t syscalls to all 32-bit architectures
y2038: rename old time and utime syscalls
y2038: remove struct definition redirects
y2038: use time32 syscall names on 32-bit
syscalls: remove obsolete __IGNORE_ macros
y2038: syscalls: rename y2038 compat syscalls
x86/x32: use time64 versions of sigtimedwait and recvmmsg
timex: change syscalls to use struct __kernel_timex
timex: use __kernel_timex internally
sparc64: add custom adjtimex/clock_adjtime functions
time: fix sys_timer_settime prototype
time: Add struct __kernel_timex
time: make adjtime compat handling available for 32 bit
...
Diffstat (limited to 'kernel/time/time.c')
-rw-r--r-- | kernel/time/time.c | 92 |
1 files changed, 78 insertions, 14 deletions
diff --git a/kernel/time/time.c b/kernel/time/time.c index 2edb5088a70b..c3f756f8534b 100644 --- a/kernel/time/time.c +++ b/kernel/time/time.c @@ -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; @@ -134,7 +134,7 @@ 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, @@ -263,35 +263,99 @@ COMPAT_SYSCALL_DEFINE2(settimeofday, struct old_timeval32 __user *, tv, } #endif -SYSCALL_DEFINE1(adjtimex, struct timex __user *, txc_p) +#if !defined(CONFIG_64BIT_TIME) || defined(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; + + return 0; +} + +int put_old_timex32(struct old_timex32 __user *utp, const struct __kernel_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; +} -COMPAT_SYSCALL_DEFINE1(adjtimex, struct compat_timex __user *, utp) +SYSCALL_DEFINE1(adjtimex_time32, struct old_timex32 __user *, utp) { - struct timex txc; + 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; |