net: Allow IPsec GSO for local sockets

This patch allows local sockets to make use of XFRM GSO code path. Signed-off-by: Steffen Klassert <[email protected]> Signed-off-by: Ilan Tayari <[email protected]>
IronBlood · Aug 2, 2017 · f70f250 · f70f250
1 parent 7e9e920
commit f70f250
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Showing 2 changed files with 20 additions and 1 deletion.
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
@@ -1858,6 +1858,20 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
 		       struct xfrm_user_offload *xuo);
 bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x);
 
+static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
+{
+	struct xfrm_state *x = dst->xfrm;
+
+	if (!x || !x->type_offload)
+		return false;
+
+	if (x->xso.offload_handle && (x->xso.dev == dst->path->dev) &&
+	    !dst->child->xfrm)
+		return true;
+
+	return false;
+}
+
 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
 {
 	struct xfrm_state_offload *xso = &x->xso;
@@ -1900,6 +1914,11 @@ static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x
 {
 	return false;
 }
+
+static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
+{
+	return false;
+}
 #endif
 
 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)

diff --git a/net/core/sock.c b/net/core/sock.c
@@ -1757,7 +1757,7 @@ void sk_setup_caps(struct sock *sk, struct dst_entry *dst)
 		sk->sk_route_caps |= NETIF_F_GSO_SOFTWARE;
 	sk->sk_route_caps &= ~sk->sk_route_nocaps;
 	if (sk_can_gso(sk)) {
-		if (dst->header_len) {
+		if (dst->header_len && !xfrm_dst_offload_ok(dst)) {
 			sk->sk_route_caps &= ~NETIF_F_GSO_MASK;
 		} else {
 			sk->sk_route_caps |= NETIF_F_SG | NETIF_F_HW_CSUM;