linux-kernel - [patch 9/13] signalfd/timerfd/asyncfd v5

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Date:	Wed, 14 Mar 2007 15:19:21 -0700
From:	Davide Libenzi <davidel@...ilserver.org>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: [patch 9/13] signalfd/timerfd/asyncfd v5 - timerfd compat code ...

This patch implement the necessary compat code for the timerfd system call.


Signed-off-by: Davide Libenzi <davidel@...ilserver.org>


- Davide



Index: linux-2.6.20.ep2/fs/compat.c
===================================================================
--- linux-2.6.20.ep2.orig/fs/compat.c	2007-03-12 11:28:03.000000000 -0700
+++ linux-2.6.20.ep2/fs/compat.c	2007-03-12 11:47:46.000000000 -0700
@@ -2257,3 +2257,23 @@
 	return sys_signalfd(ufd, ksigmask, sizeof(sigset_t));
 }
 
+
+asmlinkage long compat_sys_timerfd(int ufd, int clockid, int flags,
+				   const struct compat_itimerspec __user *utmr)
+{
+	long res;
+	struct itimerspec t;
+	struct itimerspec __user *ut;
+
+	res = -EFAULT;
+	if (get_compat_itimerspec(&t, utmr))
+		goto err_exit;
+	ut = compat_alloc_user_space(sizeof(*ut));
+	if (copy_to_user(ut, &t, sizeof(t)) )
+		goto err_exit;
+
+	res = sys_timerfd(ufd, clockid, flags, ut);
+err_exit:
+	return res;
+}
+
Index: linux-2.6.20.ep2/include/linux/compat.h
===================================================================
--- linux-2.6.20.ep2.orig/include/linux/compat.h	2007-03-12 11:28:03.000000000 -0700
+++ linux-2.6.20.ep2/include/linux/compat.h	2007-03-12 11:47:46.000000000 -0700
@@ -225,6 +225,11 @@
 	return lhs->tv_nsec - rhs->tv_nsec;
 }
 
+extern int get_compat_itimerspec(struct itimerspec *dst,
+				 const struct compat_itimerspec __user *src);
+extern int put_compat_itimerspec(struct compat_itimerspec __user *dst,
+				 const struct itimerspec *src);
+
 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
 
 extern int compat_printk(const char *fmt, ...);
Index: linux-2.6.20.ep2/kernel/compat.c
===================================================================
--- linux-2.6.20.ep2.orig/kernel/compat.c	2007-03-12 11:28:03.000000000 -0700
+++ linux-2.6.20.ep2/kernel/compat.c	2007-03-12 11:47:46.000000000 -0700
@@ -475,8 +475,8 @@
 	return min_length;
 }
 
-static int get_compat_itimerspec(struct itimerspec *dst, 
-				 struct compat_itimerspec __user *src)
+int get_compat_itimerspec(struct itimerspec *dst,
+			  const struct compat_itimerspec __user *src)
 { 
 	if (get_compat_timespec(&dst->it_interval, &src->it_interval) ||
 	    get_compat_timespec(&dst->it_value, &src->it_value))
@@ -484,8 +484,8 @@
 	return 0;
 } 
 
-static int put_compat_itimerspec(struct compat_itimerspec __user *dst, 
-				 struct itimerspec *src)
+int put_compat_itimerspec(struct compat_itimerspec __user *dst,
+			  const struct itimerspec *src)
 { 
 	if (put_compat_timespec(&src->it_interval, &dst->it_interval) ||
 	    put_compat_timespec(&src->it_value, &dst->it_value))

-
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