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-rw-r--r--net/sunrpc/sunrpc.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/net/sunrpc/sunrpc.h b/net/sunrpc/sunrpc.h
index 14c9f6d1c5ff..f2b7cb540e61 100644
--- a/net/sunrpc/sunrpc.h
+++ b/net/sunrpc/sunrpc.h
@@ -43,6 +43,19 @@ static inline int rpc_reply_expected(struct rpc_task *task)
(task->tk_msg.rpc_proc->p_decode != NULL);
}
+static inline int sock_is_loopback(struct sock *sk)
+{
+ struct dst_entry *dst;
+ int loopback = 0;
+ rcu_read_lock();
+ dst = rcu_dereference(sk->sk_dst_cache);
+ if (dst && dst->dev &&
+ (dst->dev->features & NETIF_F_LOOPBACK))
+ loopback = 1;
+ rcu_read_unlock();
+ return loopback;
+}
+
int svc_send_common(struct socket *sock, struct xdr_buf *xdr,
struct page *headpage, unsigned long headoffset,
struct page *tailpage, unsigned long tailoffset);