ipv6: add ip6_sock_set_recverr

Add a helper to directly set the IPV6_RECVERR sockopt from kernel space
without going through a fake uaccess.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 9b91188..49c4abf 100644 (file)
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -1188,4 +1188,11 @@ static inline int ip6_sock_set_v6only(struct sock *sk)
        return 0;
 }
 
+static inline void ip6_sock_set_recverr(struct sock *sk)
+{
+       lock_sock(sk);
+       inet6_sk(sk)->recverr = true;
+       release_sock(sk);
+}
+
 #endif /* _NET_IPV6_H */

diff --git a/net/rxrpc/local_object.c b/net/rxrpc/local_object.c
index 6f4e6b4..c8b2097 100644 (file)
--- a/net/rxrpc/local_object.c
+++ b/net/rxrpc/local_object.c
@@ -107,7 +107,7 @@ static struct rxrpc_local *rxrpc_alloc_local(struct rxrpc_net *rxnet,
 static int rxrpc_open_socket(struct rxrpc_local *local, struct net *net)
 {
        struct sock *usk;
-       int ret, opt;
+       int ret;
 
        _enter("%p{%d,%d}",
               local, local->srx.transport_type, local->srx.transport.family);
@@ -157,13 +157,7 @@ static int rxrpc_open_socket(struct rxrpc_local *local, struct net *net)
        switch (local->srx.transport.family) {
        case AF_INET6:
                /* we want to receive ICMPv6 errors */
-               opt = 1;
-               ret = kernel_setsockopt(local->socket, SOL_IPV6, IPV6_RECVERR,
-                                       (char *) &opt, sizeof(opt));
-               if (ret < 0) {
-                       _debug("setsockopt failed");
-                       goto error;
-               }
+               ip6_sock_set_recverr(local->socket->sk);
 
                /* Fall through and set IPv4 options too otherwise we don't get
                 * errors from IPv4 packets sent through the IPv6 socket.