@@ -481,6 +481,11 @@ struct sock {
void (*sk_error_report)(struct sock *sk);
int (*sk_backlog_rcv)(struct sock *sk,
struct sk_buff *skb);
+#ifdef CONFIG_SOCK_VALIDATE_XMIT
+ struct sk_buff* (*sk_validate_xmit_skb)(struct sock *sk,
+ struct net_device *dev,
+ struct sk_buff *skb);
+#endif
void (*sk_destruct)(struct sock *sk);
struct sock_reuseport __rcu *sk_reuseport_cb;
struct rcu_head sk_rcu;
@@ -2332,6 +2337,22 @@ static inline bool sk_fullsock(const struct sock *sk)
return (1 << sk->sk_state) & ~(TCPF_TIME_WAIT | TCPF_NEW_SYN_RECV);
}
+/* Checks if this SKB belongs to an HW offloaded socket
+ * and whether any SW fallbacks are required based on dev.
+ */
+static inline struct sk_buff *sk_validate_xmit_skb(struct sk_buff *skb,
+ struct net_device *dev)
+{
+#ifdef CONFIG_SOCK_VALIDATE_XMIT
+ struct sock *sk = skb->sk;
+
+ if (sk && sk_fullsock(sk) && sk->sk_validate_xmit_skb)
+ skb = sk->sk_validate_xmit_skb(sk, dev, skb);
+#endif
+
+ return skb;
+}
+
/* This helper checks if a socket is a LISTEN or NEW_SYN_RECV
* SYNACK messages can be attached to either ones (depending on SYNCOOKIE)
*/
@@ -407,6 +407,10 @@ config GRO_CELLS
bool
default n
+config SOCK_VALIDATE_XMIT
+ bool
+ default n
+
config NET_DEVLINK
tristate "Network physical/parent device Netlink interface"
help
@@ -3114,6 +3114,10 @@ static struct sk_buff *validate_xmit_skb(struct sk_buff *skb, struct net_device
if (unlikely(!skb))
goto out_null;
+ skb = sk_validate_xmit_skb(skb, dev);
+ if (unlikely(!skb))
+ goto out_null;
+
if (netif_needs_gso(skb, features)) {
struct sk_buff *segs;