[IPV6]: Fix the return value of ipv6_getsockopt

If CONFIG_NETFILTER if not selected when compile the kernel source code,
ipv6_getsockopt will returen an EINVAL error if optname is not supported by
the kernel. But if CONFIG_NETFILTER is selected, ENOPROTOOPT error will
be return.

This patch fix to always return ENOPROTOOPT error if optname argument of
ipv6_getsockopt is not supported by the kernel.

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 1334fc1..8c5f80f 100644 (file)
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -1046,7 +1046,7 @@ static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
                break;
 
        default:
-               return -EINVAL;
+               return -ENOPROTOOPT;
        }
        len = min_t(unsigned int, sizeof(int), len);
        if(put_user(len, optlen))
@@ -1069,9 +1069,8 @@ int ipv6_getsockopt(struct sock *sk, int level, int optname,
 
        err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
 #ifdef CONFIG_NETFILTER
-       /* we need to exclude all possible EINVALs except default case */
-       if (err == -EINVAL && optname != IPV6_ADDRFORM &&
-                       optname != MCAST_MSFILTER) {
+       /* we need to exclude all possible ENOPROTOOPTs except default case */
+       if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
                int len;
 
                if (get_user(len, optlen))
@@ -1108,9 +1107,8 @@ int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
 
        err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
 #ifdef CONFIG_NETFILTER
-       /* we need to exclude all possible EINVALs except default case */
-       if (err == -EINVAL && optname != IPV6_ADDRFORM &&
-                       optname != MCAST_MSFILTER) {
+       /* we need to exclude all possible ENOPROTOOPTs except default case */
+       if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
                int len;
 
                if (get_user(len, optlen))