[patch 5/13] signal/timer/event fds v9 - signalfd compat code ...

[Davide Libenzi <davidel@xmailserver.org>]

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


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


- Davide



Index: linux-2.6.21-rc5.fds/fs/compat.c
===================================================================
--- linux-2.6.21-rc5.fds.orig/fs/compat.c	2007-03-31 12:25:43.000000000 -0700
+++ linux-2.6.21-rc5.fds/fs/compat.c	2007-03-31 12:30:34.000000000 -0700
@@ -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>
 #include <linux/eventpoll.h>
@@ -2335,3 +2336,28 @@
 #endif /* TIF_RESTORE_SIGMASK */
 
 #endif /* CONFIG_EPOLL */
+
+#ifdef CONFIG_SIGNALFD
+
+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));
+}
+
+#endif /* CONFIG_SIGNALFD */
+