netdev - [PATCH iproute2-next] ss: Show zerocopy sendfile status of TLS sockets

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Date:   Mon, 30 May 2022 17:14:38 +0300
From:   Maxim Mikityanskiy <maximmi@...dia.com>
To:     David Ahern <dsahern@...il.com>,
        Stephen Hemminger <stephen@...workplumber.org>
CC:     Tariq Toukan <tariqt@...dia.com>,
        Boris Pismenny <borisp@...dia.com>,
        Maxim Mikityanskiy <maximmi@...dia.com>,
        <netdev@...r.kernel.org>
Subject: [PATCH iproute2-next] ss: Show zerocopy sendfile status of TLS sockets

Print the activation status of zerocopy sendfile on TLS sockets.
Zerocopy sendfile was recently added to Linux and exposed via sock_diag.

Signed-off-by: Maxim Mikityanskiy <maximmi@...dia.com>
Reviewed-by: Tariq Toukan <tariqt@...dia.com>
---
 include/uapi/linux/tls.h | 2 ++
 misc/ss.c                | 6 ++++++
 2 files changed, 8 insertions(+)

diff --git a/include/uapi/linux/tls.h b/include/uapi/linux/tls.h
index 3ad54af2..83a3cea4 100644
--- a/include/uapi/linux/tls.h
+++ b/include/uapi/linux/tls.h
@@ -39,6 +39,7 @@
 /* TLS socket options */
 #define TLS_TX			1	/* Set transmit parameters */
 #define TLS_RX			2	/* Set receive parameters */
+#define TLS_TX_ZEROCOPY_SENDFILE	3	/* transmit zerocopy sendfile */
 
 /* Supported versions */
 #define TLS_VERSION_MINOR(ver)	((ver) & 0xFF)
@@ -160,6 +161,7 @@ enum {
 	TLS_INFO_CIPHER,
 	TLS_INFO_TXCONF,
 	TLS_INFO_RXCONF,
+	TLS_INFO_ZC_SENDFILE,
 	__TLS_INFO_MAX,
 };
 #define TLS_INFO_MAX (__TLS_INFO_MAX - 1)
diff --git a/misc/ss.c b/misc/ss.c
index 4b3ca9c4..57677cf2 100644
--- a/misc/ss.c
+++ b/misc/ss.c
@@ -2952,6 +2952,11 @@ static void tcp_tls_conf(const char *name, struct rtattr *attr)
 	}
 }
 
+static void tcp_tls_zc_sendfile(struct rtattr *attr)
+{
+	out(" zerocopy_sendfile: %s", attr ? "active" : "inactive");
+}
+
 static void mptcp_subflow_info(struct rtattr *tb[])
 {
 	u_int32_t flags = 0;
@@ -3182,6 +3187,7 @@ static void tcp_show_info(const struct nlmsghdr *nlh, struct inet_diag_msg *r,
 			tcp_tls_cipher(tlsinfo[TLS_INFO_CIPHER]);
 			tcp_tls_conf("rxconf", tlsinfo[TLS_INFO_RXCONF]);
 			tcp_tls_conf("txconf", tlsinfo[TLS_INFO_TXCONF]);
+			tcp_tls_zc_sendfile(tlsinfo[TLS_INFO_ZC_SENDFILE]);
 		}
 		if (ulpinfo[INET_ULP_INFO_MPTCP]) {
 			struct rtattr *sfinfo[MPTCP_SUBFLOW_ATTR_MAX + 1] =
-- 
2.25.1