static int sk_psock_handle_skb(struct sk_psock *psock, struct sk_buff *skb,
u32 off, u32 len, bool ingress)
{
- if (ingress)
- return sk_psock_skb_ingress(psock, skb);
- else
+ if (!ingress) {
+ if (!sock_writeable(psock->sk))
+ return -EAGAIN;
return skb_send_sock_locked(psock->sk, skb, off, len);
+ }
+ return sk_psock_skb_ingress(psock, skb);
}
static void sk_psock_backlog(struct work_struct *work)
{
struct sk_psock *psock_other;
struct sock *sk_other;
- bool ingress;
sk_other = tcp_skb_bpf_redirect_fetch(skb);
+ /* This error is a buggy BPF program, it returned a redirect
+ * return code, but then didn't set a redirect interface.
+ */
if (unlikely(!sk_other)) {
kfree_skb(skb);
return;
}
psock_other = sk_psock(sk_other);
+ /* This error indicates the socket is being torn down or had another
+ * error that caused the pipe to break. We can't send a packet on
+ * a socket that is in this state so we drop the skb.
+ */
if (!psock_other || sock_flag(sk_other, SOCK_DEAD) ||
!sk_psock_test_state(psock_other, SK_PSOCK_TX_ENABLED)) {
kfree_skb(skb);
return;
}
- ingress = tcp_skb_bpf_ingress(skb);
- if ((!ingress && sock_writeable(sk_other)) ||
- (ingress &&
- atomic_read(&sk_other->sk_rmem_alloc) <=
- sk_other->sk_rcvbuf)) {
- skb_queue_tail(&psock_other->ingress_skb, skb);
- schedule_work(&psock_other->work);
- } else {
- kfree_skb(skb);
- }
+ skb_queue_tail(&psock_other->ingress_skb, skb);
+ schedule_work(&psock_other->work);
}
static void sk_psock_tls_verdict_apply(struct sk_buff *skb, int verdict)