netdev - [PATCH net-next v1 4/7] SUNRPC: Send TLS Closure alerts before closing a TCP socket

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Date: Tue, 18 Jul 2023 15:00:38 -0400
From: Chuck Lever <cel@...nel.org>
To: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
 pabeni@...hat.com
Cc: netdev@...r.kernel.org, kernel-tls-handshake@...ts.linux.dev
Subject: [PATCH net-next v1 4/7] SUNRPC: Send TLS Closure alerts before
 closing a TCP socket

From: Chuck Lever <chuck.lever@...cle.com>

Before closing a TCP connection, the TLS protocol wants peers to
send session close Alert notifications. Add those in both the RPC
client and server.

Signed-off-by: Chuck Lever <chuck.lever@...cle.com>
---
 net/sunrpc/svcsock.c  |    2 ++
 net/sunrpc/xprtsock.c |    2 ++
 2 files changed, 4 insertions(+)

diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index e43f26382411..87bf685f2957 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -1621,6 +1621,8 @@ static void svc_tcp_sock_detach(struct svc_xprt *xprt)
 {
 	struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
 
+	tls_handshake_close(svsk->sk_sock);
+
 	svc_sock_detach(xprt);
 
 	if (!test_bit(XPT_LISTENER, &xprt->xpt_flags)) {
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 9f010369100a..871f141be96f 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -1292,6 +1292,8 @@ static void xs_close(struct rpc_xprt *xprt)
 
 	dprintk("RPC:       xs_close xprt %p\n", xprt);
 
+	if (transport->sock)
+		tls_handshake_close(transport->sock);
 	xs_reset_transport(transport);
 	xprt->reestablish_timeout = 0;
 }