| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <alpine.LFD.0.9999.0710182316570.20161@localhost.localdomain>
Date: Thu, 18 Oct 2007 23:22:36 +0200 (CEST)
From: Thomas Gleixner <tglx@...utronix.de>
To: Linus Torvalds <torvalds@...ux-foundation.org>
cc: LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
Anton Blanchard <anton@...ba.org>
Subject: [Git pull] hrtimer updates
Linus,
please pull hrtimer updates for 2.6.24 from:
ssh://master.kernel.org/pub/scm/linux/kernel/git/tglx/linux-2.6-hrt.git
Thanks,
tglx
---
Anton Blanchard (2):
hrtimer: Rework hrtimer_nanosleep to make sys_compat_nanosleep easier
hrtimer: hook compat_sys_nanosleep up to high res timer code
include/linux/hrtimer.h | 2 +-
kernel/compat.c | 57 +++++++++-------------------------------------
kernel/hrtimer.c | 29 +++++++++++++----------
kernel/posix-timers.c | 17 +++++++++++--
4 files changed, 42 insertions(+), 63 deletions(-)
commit c70878b4e0b6cf8d2f1e46319e48e821ef4a8aba
Author: Anton Blanchard <anton@...ba.org>
Date: Mon Oct 15 16:13:56 2007 -0500
hrtimer: hook compat_sys_nanosleep up to high res timer code
Now we have high res timers on ppc64 I thought Id test them. It turns
out compat_sys_nanosleep hasnt been converted to the hrtimer code and so
is limited to HZ resolution.
The follow patch converts compat_sys_nanosleep to use high res timers.
Signed-off-by: Anton Blanchard <anton@...ba.org>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
diff --git a/kernel/compat.c b/kernel/compat.c
index 3bae374..252a446 100644
--- a/kernel/compat.c
+++ b/kernel/compat.c
@@ -40,62 +40,27 @@ int put_compat_timespec(const struct timespec *ts, struct compat_timespec __user
__put_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0;
}
-static long compat_nanosleep_restart(struct restart_block *restart)
-{
- unsigned long expire = restart->arg0, now = jiffies;
- struct compat_timespec __user *rmtp;
-
- /* Did it expire while we handled signals? */
- if (!time_after(expire, now))
- return 0;
-
- expire = schedule_timeout_interruptible(expire - now);
- if (expire == 0)
- return 0;
-
- rmtp = (struct compat_timespec __user *)restart->arg1;
- if (rmtp) {
- struct compat_timespec ct;
- struct timespec t;
-
- jiffies_to_timespec(expire, &t);
- ct.tv_sec = t.tv_sec;
- ct.tv_nsec = t.tv_nsec;
- if (copy_to_user(rmtp, &ct, sizeof(ct)))
- return -EFAULT;
- }
- /* The 'restart' block is already filled in */
- return -ERESTART_RESTARTBLOCK;
-}
-
asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
- struct compat_timespec __user *rmtp)
+ struct compat_timespec __user *rmtp)
{
- struct timespec t;
- struct restart_block *restart;
- unsigned long expire;
+ struct timespec tu, rmt;
+ long ret;
- if (get_compat_timespec(&t, rqtp))
+ if (get_compat_timespec(&tu, rqtp))
return -EFAULT;
- if ((t.tv_nsec >= 1000000000L) || (t.tv_nsec < 0) || (t.tv_sec < 0))
+ if (!timespec_valid(&tu))
return -EINVAL;
- expire = timespec_to_jiffies(&t) + (t.tv_sec || t.tv_nsec);
- expire = schedule_timeout_interruptible(expire);
- if (expire == 0)
- return 0;
+ ret = hrtimer_nanosleep(&tu, rmtp ? &rmt : NULL, HRTIMER_MODE_REL,
+ CLOCK_MONOTONIC);
- if (rmtp) {
- jiffies_to_timespec(expire, &t);
- if (put_compat_timespec(&t, rmtp))
+ if (ret && rmtp) {
+ if (put_compat_timespec(&rmt, rmtp))
return -EFAULT;
}
- restart = ¤t_thread_info()->restart_block;
- restart->fn = compat_nanosleep_restart;
- restart->arg0 = jiffies + expire;
- restart->arg1 = (unsigned long) rmtp;
- return -ERESTART_RESTARTBLOCK;
+
+ return ret;
}
static inline long get_compat_itimerval(struct itimerval *o,
commit 04c227140fed77587432667a574b14736a06dd7f
Author: Anton Blanchard <anton@...ba.org>
Date: Mon Oct 15 16:06:04 2007 -0500
hrtimer: Rework hrtimer_nanosleep to make sys_compat_nanosleep easier
Pull the copy_to_user out of hrtimer_nanosleep and into the callers
(common_nsleep, sys_nanosleep) in preparation for converting
compat_sys_nanosleep to use hrtimers.
Signed-off-by: Anton Blanchard <anton@...ba.org>
Acked-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index 540799b..7a9398e 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -300,7 +300,7 @@ hrtimer_forward(struct hrtimer *timer, ktime_t now, ktime_t interval);
/* Precise sleep: */
extern long hrtimer_nanosleep(struct timespec *rqtp,
- struct timespec __user *rmtp,
+ struct timespec *rmtp,
const enum hrtimer_mode mode,
const clockid_t clockid);
extern long hrtimer_nanosleep_restart(struct restart_block *restart_block);
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index dc8a445..b2b2c2b 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -1286,8 +1286,7 @@ static int __sched do_nanosleep(struct hrtimer_sleeper *t, enum hrtimer_mode mod
long __sched hrtimer_nanosleep_restart(struct restart_block *restart)
{
struct hrtimer_sleeper t;
- struct timespec __user *rmtp;
- struct timespec tu;
+ struct timespec *rmtp;
ktime_t time;
restart->fn = do_no_restart_syscall;
@@ -1298,14 +1297,12 @@ long __sched hrtimer_nanosleep_restart(struct restart_block *restart)
if (do_nanosleep(&t, HRTIMER_MODE_ABS))
return 0;
- rmtp = (struct timespec __user *) restart->arg1;
+ rmtp = (struct timespec *)restart->arg1;
if (rmtp) {
time = ktime_sub(t.timer.expires, t.timer.base->get_time());
if (time.tv64 <= 0)
return 0;
- tu = ktime_to_timespec(time);
- if (copy_to_user(rmtp, &tu, sizeof(tu)))
- return -EFAULT;
+ *rmtp = ktime_to_timespec(time);
}
restart->fn = hrtimer_nanosleep_restart;
@@ -1314,12 +1311,11 @@ long __sched hrtimer_nanosleep_restart(struct restart_block *restart)
return -ERESTART_RESTARTBLOCK;
}
-long hrtimer_nanosleep(struct timespec *rqtp, struct timespec __user *rmtp,
+long hrtimer_nanosleep(struct timespec *rqtp, struct timespec *rmtp,
const enum hrtimer_mode mode, const clockid_t clockid)
{
struct restart_block *restart;
struct hrtimer_sleeper t;
- struct timespec tu;
ktime_t rem;
hrtimer_init(&t.timer, clockid, mode);
@@ -1335,9 +1331,7 @@ long hrtimer_nanosleep(struct timespec *rqtp, struct timespec __user *rmtp,
rem = ktime_sub(t.timer.expires, t.timer.base->get_time());
if (rem.tv64 <= 0)
return 0;
- tu = ktime_to_timespec(rem);
- if (copy_to_user(rmtp, &tu, sizeof(tu)))
- return -EFAULT;
+ *rmtp = ktime_to_timespec(rem);
}
restart = ¤t_thread_info()->restart_block;
@@ -1353,7 +1347,8 @@ long hrtimer_nanosleep(struct timespec *rqtp, struct timespec __user *rmtp,
asmlinkage long
sys_nanosleep(struct timespec __user *rqtp, struct timespec __user *rmtp)
{
- struct timespec tu;
+ struct timespec tu, rmt;
+ int ret;
if (copy_from_user(&tu, rqtp, sizeof(tu)))
return -EFAULT;
@@ -1361,7 +1356,15 @@ sys_nanosleep(struct timespec __user *rqtp, struct timespec __user *rmtp)
if (!timespec_valid(&tu))
return -EINVAL;
- return hrtimer_nanosleep(&tu, rmtp, HRTIMER_MODE_REL, CLOCK_MONOTONIC);
+ ret = hrtimer_nanosleep(&tu, rmtp ? &rmt : NULL, HRTIMER_MODE_REL,
+ CLOCK_MONOTONIC);
+
+ if (ret && rmtp) {
+ if (copy_to_user(rmtp, &rmt, sizeof(*rmtp)))
+ return -EFAULT;
+ }
+
+ return ret;
}
/*
diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c
index d71ed09..d11f579 100644
--- a/kernel/posix-timers.c
+++ b/kernel/posix-timers.c
@@ -981,9 +981,20 @@ sys_clock_getres(const clockid_t which_clock, struct timespec __user *tp)
static int common_nsleep(const clockid_t which_clock, int flags,
struct timespec *tsave, struct timespec __user *rmtp)
{
- return hrtimer_nanosleep(tsave, rmtp, flags & TIMER_ABSTIME ?
- HRTIMER_MODE_ABS : HRTIMER_MODE_REL,
- which_clock);
+ struct timespec rmt;
+ int ret;
+
+ ret = hrtimer_nanosleep(tsave, rmtp ? &rmt : NULL,
+ flags & TIMER_ABSTIME ?
+ HRTIMER_MODE_ABS : HRTIMER_MODE_REL,
+ which_clock);
+
+ if (ret && rmtp) {
+ if (copy_to_user(rmtp, &rmt, sizeof(*rmtp)))
+ return -EFAULT;
+ }
+
+ return ret;
}
asmlinkage long
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists