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, 8 insertions, 1 deletions

diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index 4d8d95404f45..e0514e82308e 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -1186,7 +1186,14 @@ int ip_getsockopt(struct sock *sk, int level,
 int compat_ip_getsockopt(struct sock *sk, int level, int optname,
                          char __user *optval, int __user *optlen)
 {
-        int err = do_ip_getsockopt(sk, level, optname, optval, optlen);
+        int err;
+
+        if (optname == MCAST_MSFILTER)
+                return compat_mc_getsockopt(sk, level, optname, optval, optlen,
+                        ip_getsockopt);
+
+        err = do_ip_getsockopt(sk, level, optname, optval, optlen);
+
 #ifdef CONFIG_NETFILTER
         /* we need to exclude all possible ENOPROTOOPTs except default case */
         if (err == -ENOPROTOOPT && optname != IP_PKTOPTIONS &&