netdev - [PATCH ethtool-next] ethtool: rings: report TCP header-data split

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Date:   Tue, 29 Nov 2022 17:35:57 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     mkubecek@...e.cz
Cc:     netdev@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH ethtool-next] ethtool: rings: report TCP header-data split

Report if device is in HDS compatible mode or not.

Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
 netlink/rings.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/netlink/rings.c b/netlink/rings.c
index d50bbac47701..628403520f4a 100644
--- a/netlink/rings.c
+++ b/netlink/rings.c
@@ -20,6 +20,7 @@ int rings_reply_cb(const struct nlmsghdr *nlhdr, void *data)
 	const struct nlattr *tb[ETHTOOL_A_RINGS_MAX + 1] = {};
 	DECLARE_ATTR_TB_INFO(tb);
 	struct nl_context *nlctx = data;
+	unsigned char tcp_hds;
 	bool silent;
 	int err_ret;
 	int ret;
@@ -50,6 +51,24 @@ int rings_reply_cb(const struct nlmsghdr *nlhdr, void *data)
 	show_u32(tb[ETHTOOL_A_RINGS_CQE_SIZE], "CQE Size:\t\t");
 	show_bool("tx-push", "TX Push:\t%s\n", tb[ETHTOOL_A_RINGS_TX_PUSH]);
 
+	tcp_hds = tb[ETHTOOL_A_RINGS_TCP_DATA_SPLIT] ?
+		mnl_attr_get_u8(tb[ETHTOOL_A_RINGS_TCP_DATA_SPLIT]) : 0;
+	printf("TCP data split:\t");
+	switch (tcp_hds) {
+	case ETHTOOL_TCP_DATA_SPLIT_UNKNOWN:
+		printf("n/a\n");
+		break;
+	case ETHTOOL_TCP_DATA_SPLIT_DISABLED:
+		printf("off\n");
+		break;
+	case ETHTOOL_TCP_DATA_SPLIT_ENABLED:
+		printf("on\n");
+		break;
+	default:
+		printf("unknown(%d)\n", tcp_hds);
+		break;
+	}
+
 	return MNL_CB_OK;
 }
 
-- 
2.38.1