From: Deepa Dinamani <deepa.kernel@gmail.com>
To: tglx@linutronix.de, viro@zeniv.linux.org.uk,
linux-kernel@vger.kernel.org
Cc: john.stultz@linaro.org, nicolas.pitre@linaro.org, arnd@arndb.de,
y2038@lists.linaro.org, linux-fsdevel@vger.kernel.org
Subject: [PATCH v3 5/7] nanosleep: Use get_timepsec64() and put_timespec64()
Date: Sat, 24 Jun 2017 11:45:06 -0700 [thread overview]
Message-ID: <20170624184508.21500-6-deepa.kernel@gmail.com> (raw)
In-Reply-To: <20170624184508.21500-1-deepa.kernel@gmail.com>
Usage of these apis and their compat versions makes
the syscalls: clock_nanosleep and nanosleep and
their compat implementations simpler.
This is a preparatory patch to isolate data conversions to
struct timespec64 at userspace boundaries. This helps contain
the changes needed to transition to new y2038 safe types.
Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
---
include/linux/hrtimer.h | 2 +-
kernel/time/alarmtimer.c | 4 ++--
kernel/time/hrtimer.c | 30 +++++++++++++-----------------
kernel/time/posix-cpu-timers.c | 8 ++------
kernel/time/posix-timers.c | 20 ++++++++------------
5 files changed, 26 insertions(+), 38 deletions(-)
diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index 255edd5e7a74..012c37fdb688 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -453,7 +453,7 @@ static inline u64 hrtimer_forward_now(struct hrtimer *timer,
/* Precise sleep: */
-extern int nanosleep_copyout(struct restart_block *, struct timespec *);
+extern int nanosleep_copyout(struct restart_block *, struct timespec64 *);
extern long hrtimer_nanosleep(const struct timespec64 *rqtp,
const enum hrtimer_mode mode,
const clockid_t clockid);
diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c
index c991cf212c6d..0b8ff7d257ea 100644
--- a/kernel/time/alarmtimer.c
+++ b/kernel/time/alarmtimer.c
@@ -712,14 +712,14 @@ static int alarmtimer_do_nsleep(struct alarm *alarm, ktime_t absexp,
alarmtimer_freezerset(absexp, type);
restart = ¤t->restart_block;
if (restart->nanosleep.type != TT_NONE) {
- struct timespec rmt;
+ struct timespec64 rmt;
ktime_t rem;
rem = ktime_sub(absexp, alarm_bases[type].gettime());
if (rem <= 0)
return 0;
- rmt = ktime_to_timespec(rem);
+ rmt = ktime_to_timespec64(rem);
return nanosleep_copyout(restart, &rmt);
}
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
index 81da124f1115..88f75f92ef36 100644
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -1440,17 +1440,17 @@ void hrtimer_init_sleeper(struct hrtimer_sleeper *sl, struct task_struct *task)
}
EXPORT_SYMBOL_GPL(hrtimer_init_sleeper);
-int nanosleep_copyout(struct restart_block *restart, struct timespec *ts)
+int nanosleep_copyout(struct restart_block *restart, struct timespec64 *ts)
{
switch(restart->nanosleep.type) {
#ifdef CONFIG_COMPAT
case TT_COMPAT:
- if (compat_put_timespec(ts, restart->nanosleep.compat_rmtp))
+ if (compat_put_timespec64(ts, restart->nanosleep.compat_rmtp))
return -EFAULT;
break;
#endif
case TT_NATIVE:
- if (copy_to_user(restart->nanosleep.rmtp, ts, sizeof(struct timespec)))
+ if (put_timespec64(ts, restart->nanosleep.rmtp))
return -EFAULT;
break;
default:
@@ -1485,11 +1485,11 @@ static int __sched do_nanosleep(struct hrtimer_sleeper *t, enum hrtimer_mode mod
restart = ¤t->restart_block;
if (restart->nanosleep.type != TT_NONE) {
ktime_t rem = hrtimer_expires_remaining(&t->timer);
- struct timespec rmt;
+ struct timespec64 rmt;
if (rem <= 0)
return 0;
- rmt = ktime_to_timespec(rem);
+ rmt = ktime_to_timespec64(rem);
return nanosleep_copyout(restart, &rmt);
}
@@ -1546,19 +1546,17 @@ long hrtimer_nanosleep(const struct timespec64 *rqtp,
SYSCALL_DEFINE2(nanosleep, struct timespec __user *, rqtp,
struct timespec __user *, rmtp)
{
- struct timespec64 tu64;
- struct timespec tu;
+ struct timespec64 tu;
- if (copy_from_user(&tu, rqtp, sizeof(tu)))
+ if (get_timespec64(&tu, rqtp))
return -EFAULT;
- tu64 = timespec_to_timespec64(tu);
- if (!timespec64_valid(&tu64))
+ if (!timespec64_valid(&tu))
return -EINVAL;
current->restart_block.nanosleep.type = rmtp ? TT_NATIVE : TT_NONE;
current->restart_block.nanosleep.rmtp = rmtp;
- return hrtimer_nanosleep(&tu64, HRTIMER_MODE_REL, CLOCK_MONOTONIC);
+ return hrtimer_nanosleep(&tu, HRTIMER_MODE_REL, CLOCK_MONOTONIC);
}
#ifdef CONFIG_COMPAT
@@ -1566,19 +1564,17 @@ SYSCALL_DEFINE2(nanosleep, struct timespec __user *, rqtp,
COMPAT_SYSCALL_DEFINE2(nanosleep, struct compat_timespec __user *, rqtp,
struct compat_timespec __user *, rmtp)
{
- struct timespec64 tu64;
- struct timespec tu;
+ struct timespec64 tu;
- if (compat_get_timespec(&tu, rqtp))
+ if (compat_get_timespec64(&tu, rqtp))
return -EFAULT;
- tu64 = timespec_to_timespec64(tu);
- if (!timespec64_valid(&tu64))
+ if (!timespec64_valid(&tu))
return -EINVAL;
current->restart_block.nanosleep.type = rmtp ? TT_COMPAT : TT_NONE;
current->restart_block.nanosleep.compat_rmtp = rmtp;
- return hrtimer_nanosleep(&tu64, HRTIMER_MODE_REL, CLOCK_MONOTONIC);
+ return hrtimer_nanosleep(&tu, HRTIMER_MODE_REL, CLOCK_MONOTONIC);
}
#endif
diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c
index 60cb24ac9ebc..a3bd5dbe0dc4 100644
--- a/kernel/time/posix-cpu-timers.c
+++ b/kernel/time/posix-cpu-timers.c
@@ -1318,12 +1318,8 @@ static int do_cpu_nanosleep(const clockid_t which_clock, int flags,
*/
restart = ¤t->restart_block;
restart->nanosleep.expires = expires;
- if (restart->nanosleep.type != TT_NONE) {
- struct timespec ts;
-
- ts = timespec64_to_timespec(it.it_value);
- error = nanosleep_copyout(restart, &ts);
- }
+ if (restart->nanosleep.type != TT_NONE)
+ error = nanosleep_copyout(restart, &it.it_value);
}
return error;
diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c
index 8717f4bc7182..6818818caffd 100644
--- a/kernel/time/posix-timers.c
+++ b/kernel/time/posix-timers.c
@@ -1207,26 +1207,24 @@ SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags,
struct timespec __user *, rmtp)
{
const struct k_clock *kc = clockid_to_kclock(which_clock);
- struct timespec64 t64;
- struct timespec t;
+ struct timespec64 t;
if (!kc)
return -EINVAL;
if (!kc->nsleep)
return -ENANOSLEEP_NOTSUP;
- if (copy_from_user(&t, rqtp, sizeof (struct timespec)))
+ if (get_timespec64(&t, rqtp))
return -EFAULT;
- t64 = timespec_to_timespec64(t);
- if (!timespec64_valid(&t64))
+ if (!timespec64_valid(&t))
return -EINVAL;
if (flags & TIMER_ABSTIME)
rmtp = NULL;
current->restart_block.nanosleep.type = rmtp ? TT_NATIVE : TT_NONE;
current->restart_block.nanosleep.rmtp = rmtp;
- return kc->nsleep(which_clock, flags, &t64);
+ return kc->nsleep(which_clock, flags, &t);
}
#ifdef CONFIG_COMPAT
@@ -1235,26 +1233,24 @@ COMPAT_SYSCALL_DEFINE4(clock_nanosleep, clockid_t, which_clock, int, flags,
struct compat_timespec __user *, rmtp)
{
const struct k_clock *kc = clockid_to_kclock(which_clock);
- struct timespec64 t64;
- struct timespec t;
+ struct timespec64 t;
if (!kc)
return -EINVAL;
if (!kc->nsleep)
return -ENANOSLEEP_NOTSUP;
- if (compat_get_timespec(&t, rqtp))
+ if (compat_get_timespec64(&t, rqtp))
return -EFAULT;
- t64 = timespec_to_timespec64(t);
- if (!timespec64_valid(&t64))
+ if (!timespec64_valid(&t))
return -EINVAL;
if (flags & TIMER_ABSTIME)
rmtp = NULL;
current->restart_block.nanosleep.type = rmtp ? TT_COMPAT : TT_NONE;
current->restart_block.nanosleep.compat_rmtp = rmtp;
- return kc->nsleep(which_clock, flags, &t64);
+ return kc->nsleep(which_clock, flags, &t);
}
#endif
--
2.11.0
next prev parent reply other threads:[~2017-06-24 18:45 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-24 18:45 [PATCH v3 0/7] Isolate time_t data types for clock/timer syscalls Deepa Dinamani
2017-06-24 18:45 ` [PATCH v3 1/7] time: add get_timespec64 and put_timespec64 Deepa Dinamani
2017-06-24 18:45 ` [PATCH v3 2/7] time: introduce {get,put}_itimerspec64 Deepa Dinamani
2017-06-24 18:45 ` [PATCH v3 3/7] posix-stubs: Conditionally include COMPAT_SYS_NI defines Deepa Dinamani
2017-06-24 18:45 ` [PATCH v3 4/7] posix-timers: Use get_timepsec64() and put_timespec64() Deepa Dinamani
2017-06-24 18:45 ` Deepa Dinamani [this message]
2017-06-24 18:45 ` [PATCH v3 6/7] timerfd: Use get_itimerspec64() and put_itimerspec64() Deepa Dinamani
2017-06-24 18:45 ` [PATCH v3 7/7] posix_clocks: " Deepa Dinamani
2017-06-26 2:35 ` [PATCH v3 0/7] Isolate time_t data types for clock/timer syscalls Al Viro
2017-06-26 4:13 ` Al Viro
2017-06-26 18:17 ` Deepa Dinamani
2017-06-26 20:09 ` Arnd Bergmann
2017-06-27 4:58 ` Deepa Dinamani
2017-07-03 10:23 ` Thomas Gleixner
2017-07-03 11:19 ` Arnd Bergmann
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170624184508.21500-6-deepa.kernel@gmail.com \
--to=deepa.kernel@gmail.com \
--cc=arnd@arndb.de \
--cc=john.stultz@linaro.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=nicolas.pitre@linaro.org \
--cc=tglx@linutronix.de \
--cc=viro@zeniv.linux.org.uk \
--cc=y2038@lists.linaro.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).