net: Add compat support for getsockopt (MCAST_MSFILTER)

This patch adds support for getsockopt for MCAST_MSFILTER for
both IPv4 and IPv6. It depends on the previous setsockopt patch,
and uses the same method.

Signed-off-by: David L Stevens <dlstevens@us.ibm.com>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/net/compat.h b/include/net/compat.h
index 05fa5d0254ab..164cb682e220 100644
--- a/include/net/compat.h
+++ b/include/net/compat.h
@@ -42,5 +42,8 @@ extern int cmsghdr_from_user_compat_to_kern(struct msghdr *, struct sock *, unsi
 
 extern int compat_mc_setsockopt(struct sock *, int, int, char __user *, int,
         int (*)(struct sock *, int, int, char __user *, int));
+extern int compat_mc_getsockopt(struct sock *, int, int, char __user *,
+        int __user *, int (*)(struct sock *, int, int, char __user *,
+                                int __user *));
 
 #endif /* NET_COMPAT_H */