net_sched: em_meta: use skb_to_full_sk() helper

SYNACK packets might be attached to request sockets.

Fixes: ca6fb065 ("tcp: attach SYNACK messages to request sockets instead of listener")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sched/em_meta.c

@@ -343,119 +343,145 @@ META_COLLECTOR(int_sk_refcnt)
 
 META_COLLECTOR(int_sk_rcvbuf)
 {
-	if (skip_nonlocal(skb)) {
+	const struct sock *sk = skb_to_full_sk(skb);
+
+	if (!sk) {
 		*err = -1;
 		return;
 	}
-	dst->value = skb->sk->sk_rcvbuf;
+	dst->value = sk->sk_rcvbuf;
 }
 
 META_COLLECTOR(int_sk_shutdown)
 {
-	if (skip_nonlocal(skb)) {
+	const struct sock *sk = skb_to_full_sk(skb);
+
+	if (!sk) {
 		*err = -1;
 		return;
 	}
-	dst->value = skb->sk->sk_shutdown;
+	dst->value = sk->sk_shutdown;
 }
 
 META_COLLECTOR(int_sk_proto)
 {
-	if (skip_nonlocal(skb)) {
+	const struct sock *sk = skb_to_full_sk(skb);
+
+	if (!sk) {
 		*err = -1;
 		return;
 	}
-	dst->value = skb->sk->sk_protocol;
+	dst->value = sk->sk_protocol;
 }
 
 META_COLLECTOR(int_sk_type)
 {
-	if (skip_nonlocal(skb)) {
+	const struct sock *sk = skb_to_full_sk(skb);
+
+	if (!sk) {
 		*err = -1;
 		return;
 	}
-	dst->value = skb->sk->sk_type;
+	dst->value = sk->sk_type;
 }
 
 META_COLLECTOR(int_sk_rmem_alloc)
 {
-	if (skip_nonlocal(skb)) {
+	const struct sock *sk = skb_to_full_sk(skb);
+
+	if (!sk) {
 		*err = -1;
 		return;
 	}
-	dst->value = sk_rmem_alloc_get(skb->sk);
+	dst->value = sk_rmem_alloc_get(sk);
 }
 
 META_COLLECTOR(int_sk_wmem_alloc)
 {
-	if (skip_nonlocal(skb)) {
+	const struct sock *sk = skb_to_full_sk(skb);
+
+	if (!sk) {
 		*err = -1;
 		return;
 	}
-	dst->value = sk_wmem_alloc_get(skb->sk);
+	dst->value = sk_wmem_alloc_get(sk);
 }
 
 META_COLLECTOR(int_sk_omem_alloc)
 {
-	if (skip_nonlocal(skb)) {
+	const struct sock *sk = skb_to_full_sk(skb);
+
+	if (!sk) {
 		*err = -1;
 		return;
 	}
-	dst->value = atomic_read(&skb->sk->sk_omem_alloc);
+	dst->value = atomic_read(&sk->sk_omem_alloc);
 }
 
 META_COLLECTOR(int_sk_rcv_qlen)
 {
-	if (skip_nonlocal(skb)) {
+	const struct sock *sk = skb_to_full_sk(skb);
+
+	if (!sk) {
 		*err = -1;
 		return;
 	}
-	dst->value = skb->sk->sk_receive_queue.qlen;
+	dst->value = sk->sk_receive_queue.qlen;
 }
 
 META_COLLECTOR(int_sk_snd_qlen)
 {
-	if (skip_nonlocal(skb)) {
+	const struct sock *sk = skb_to_full_sk(skb);
+
+	if (!sk) {
 		*err = -1;
 		return;
 	}
-	dst->value = skb->sk->sk_write_queue.qlen;
+	dst->value = sk->sk_write_queue.qlen;
 }
 
 META_COLLECTOR(int_sk_wmem_queued)
 {
-	if (skip_nonlocal(skb)) {
+	const struct sock *sk = skb_to_full_sk(skb);
+
+	if (!sk) {
 		*err = -1;
 		return;
 	}
-	dst->value = skb->sk->sk_wmem_queued;
+	dst->value = sk->sk_wmem_queued;
 }
 
 META_COLLECTOR(int_sk_fwd_alloc)
 {
-	if (skip_nonlocal(skb)) {
+	const struct sock *sk = skb_to_full_sk(skb);
+
+	if (!sk) {
 		*err = -1;
 		return;
 	}
-	dst->value = skb->sk->sk_forward_alloc;
+	dst->value = sk->sk_forward_alloc;
 }
 
 META_COLLECTOR(int_sk_sndbuf)
 {
-	if (skip_nonlocal(skb)) {
+	const struct sock *sk = skb_to_full_sk(skb);
+
+	if (!sk) {
 		*err = -1;
 		return;
 	}
-	dst->value = skb->sk->sk_sndbuf;
+	dst->value = sk->sk_sndbuf;
 }
 
 META_COLLECTOR(int_sk_alloc)
 {
-	if (skip_nonlocal(skb)) {
+	const struct sock *sk = skb_to_full_sk(skb);
+
+	if (!sk) {
 		*err = -1;
 		return;
 	}
-	dst->value = (__force int) skb->sk->sk_allocation;
+	dst->value = (__force int) sk->sk_allocation;
 }
 
 META_COLLECTOR(int_sk_hash)
@@ -469,92 +495,112 @@ META_COLLECTOR(int_sk_hash)
 
 META_COLLECTOR(int_sk_lingertime)
 {
-	if (skip_nonlocal(skb)) {
+	const struct sock *sk = skb_to_full_sk(skb);
+
+	if (!sk) {
 		*err = -1;
 		return;
 	}
-	dst->value = skb->sk->sk_lingertime / HZ;
+	dst->value = sk->sk_lingertime / HZ;
 }
 
 META_COLLECTOR(int_sk_err_qlen)
 {
-	if (skip_nonlocal(skb)) {
+	const struct sock *sk = skb_to_full_sk(skb);
+
+	if (!sk) {
 		*err = -1;
 		return;
 	}
-	dst->value = skb->sk->sk_error_queue.qlen;
+	dst->value = sk->sk_error_queue.qlen;
 }
 
 META_COLLECTOR(int_sk_ack_bl)
 {
-	if (skip_nonlocal(skb)) {
+	const struct sock *sk = skb_to_full_sk(skb);
+
+	if (!sk) {
 		*err = -1;
 		return;
 	}
-	dst->value = skb->sk->sk_ack_backlog;
+	dst->value = sk->sk_ack_backlog;
 }
 
 META_COLLECTOR(int_sk_max_ack_bl)
 {
-	if (skip_nonlocal(skb)) {
+	const struct sock *sk = skb_to_full_sk(skb);
+
+	if (!sk) {
 		*err = -1;
 		return;
 	}
-	dst->value = skb->sk->sk_max_ack_backlog;
+	dst->value = sk->sk_max_ack_backlog;
 }
 
 META_COLLECTOR(int_sk_prio)
 {
-	if (skip_nonlocal(skb)) {
+	const struct sock *sk = skb_to_full_sk(skb);
+
+	if (!sk) {
 		*err = -1;
 		return;
 	}
-	dst->value = skb->sk->sk_priority;
+	dst->value = sk->sk_priority;
 }
 
 META_COLLECTOR(int_sk_rcvlowat)
 {
-	if (skip_nonlocal(skb)) {
+	const struct sock *sk = skb_to_full_sk(skb);
+
+	if (!sk) {
 		*err = -1;
 		return;
 	}
-	dst->value = skb->sk->sk_rcvlowat;
+	dst->value = sk->sk_rcvlowat;
 }
 
 META_COLLECTOR(int_sk_rcvtimeo)
 {
-	if (skip_nonlocal(skb)) {
+	const struct sock *sk = skb_to_full_sk(skb);
+
+	if (!sk) {
 		*err = -1;
 		return;
 	}
-	dst->value = skb->sk->sk_rcvtimeo / HZ;
+	dst->value = sk->sk_rcvtimeo / HZ;
 }
 
 META_COLLECTOR(int_sk_sndtimeo)
 {
-	if (skip_nonlocal(skb)) {
+	const struct sock *sk = skb_to_full_sk(skb);
+
+	if (!sk) {
 		*err = -1;
 		return;
 	}
-	dst->value = skb->sk->sk_sndtimeo / HZ;
+	dst->value = sk->sk_sndtimeo / HZ;
 }
 
 META_COLLECTOR(int_sk_sendmsg_off)
 {
-	if (skip_nonlocal(skb)) {
+	const struct sock *sk = skb_to_full_sk(skb);
+
+	if (!sk) {
 		*err = -1;
 		return;
 	}
-	dst->value = skb->sk->sk_frag.offset;
+	dst->value = sk->sk_frag.offset;
 }
 
 META_COLLECTOR(int_sk_write_pend)
 {
-	if (skip_nonlocal(skb)) {
+	const struct sock *sk = skb_to_full_sk(skb);
+
+	if (!sk) {
 		*err = -1;
 		return;
 	}
-	dst->value = skb->sk->sk_write_pending;
+	dst->value = sk->sk_write_pending;
 }
 
 /**************************************************************************