tls: rx: wrap recv_pkt accesses in helpers

To allow for the logic to change later wrap accesses
which interrogate the input skb in helper functions.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

net/tls/tls.h

@@ -142,6 +142,11 @@ static inline struct sk_buff *tls_strp_msg(struct tls_sw_context_rx *ctx)
 	return ctx->recv_pkt;
 }
 
+static inline bool tls_strp_msg_ready(struct tls_sw_context_rx *ctx)
+{
+	return ctx->recv_pkt;
+}
+
 #ifdef CONFIG_TLS_DEVICE
 int tls_device_init(void);
 void tls_device_cleanup(void);

net/tls/tls_sw.c

@@ -1289,7 +1289,7 @@ tls_rx_rec_wait(struct sock *sk, struct sk_psock *psock, bool nonblock,
 	struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx);
 	DEFINE_WAIT_FUNC(wait, woken_wake_function);
 
-	while (!ctx->recv_pkt) {
+	while (!tls_strp_msg_ready(ctx)) {
 		if (!sk_psock_queue_empty(psock))
 			return 0;
 
@@ -1298,7 +1298,7 @@ tls_rx_rec_wait(struct sock *sk, struct sk_psock *psock, bool nonblock,
 
 		if (!skb_queue_empty(&sk->sk_receive_queue)) {
 			__strp_unpause(&ctx->strp);
-			if (ctx->recv_pkt)
+			if (tls_strp_msg_ready(ctx))
 				break;
 		}
 
@@ -1314,7 +1314,8 @@ tls_rx_rec_wait(struct sock *sk, struct sk_psock *psock, bool nonblock,
 		add_wait_queue(sk_sleep(sk), &wait);
 		sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk);
 		sk_wait_event(sk, &timeo,
-			      ctx->recv_pkt || !sk_psock_queue_empty(psock),
+			      tls_strp_msg_ready(ctx) ||
+			      !sk_psock_queue_empty(psock),
 			      &wait);
 		sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk);
 		remove_wait_queue(sk_sleep(sk), &wait);
@@ -1907,7 +1908,7 @@ int tls_sw_recvmsg(struct sock *sk,
 	zc_capable = !bpf_strp_enabled && !is_kvec && !is_peek &&
 		ctx->zc_capable;
 	decrypted = 0;
-	while (len && (decrypted + copied < target || ctx->recv_pkt)) {
+	while (len && (decrypted + copied < target || tls_strp_msg_ready(ctx))) {
 		struct tls_decrypt_arg darg;
 		int to_decrypt, chunk;
 
@@ -2158,7 +2159,7 @@ bool tls_sw_sock_is_readable(struct sock *sk)
 		ingress_empty = list_empty(&psock->ingress_msg);
 	rcu_read_unlock();
 
-	return !ingress_empty || ctx->recv_pkt ||
+	return !ingress_empty || tls_strp_msg_ready(ctx) ||
 		!skb_queue_empty(&ctx->rx_list);
 }