linux-kernel - [patch 5/5] signalfd v2

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Message-ID: <Pine.LNX.4.64.0703071716040.3672@alien.or.mcafeemobile.com>
Date:	Wed, 7 Mar 2007 17:22:21 -0800 (PST)
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>
Subject: [patch 5/5] signalfd v2 - compat code ...

This patch implement the necessary compat code for the signalfd system calls.


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	2007-03-07 13:28:39.000000000 -0800
+++ linux-2.6.20.ep2/fs/compat.c	2007-03-07 13:42:18.000000000 -0800
@@ -46,6 +46,7 @@
 #include <linux/rwsem.h>
 #include <linux/tsacct_kern.h>
 #include <linux/highmem.h>
+#include <linux/signal.h>
 #include <linux/poll.h>
 #include <linux/mm.h>
 
@@ -2235,3 +2236,41 @@
 	return sys_ni_syscall();
 }
 #endif
+
+asmlinkage long compat_sys_signalfd(int ufd,
+				    const compat_sigset_t __user *sigmask,
+				    compat_size_t sigsetsize)
+{
+	compat_sigset_t ss32;
+	sigset_t tmp;
+	sigset_t __user *ksigmask;
+
+	if (sigsetsize != sizeof(compat_sigset_t))
+		return -EINVAL;
+	if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
+		return -EFAULT;
+	sigset_from_compat(&tmp, &ss32);
+	ksigmask = compat_alloc_user_space(sizeof(sigset_t));
+	if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t)))
+		return -EFAULT;
+
+	return sys_signalfd(ufd, ksigmask, sizeof(sigset_t));
+}
+
+asmlinkage long compat_sys_signalfd_dequeue(int fd,
+					    struct compat_siginfo __user *info,
+					    long timeo)
+{
+	siginfo_t kinfo;
+	long ret;
+	mm_segment_t old_fs = get_fs();
+
+	set_fs(KERNEL_DS);
+	ret = sys_signalfd_dequeue(fd, (siginfo_t __user *) &kinfo, timeo);
+	set_fs(old_fs);
+	if (!ret)
+		ret = copy_siginfo_to_user32(info, &kinfo);
+
+	return ret;
+}
+
-
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