netdev - [PATCH net-next] tun: Implement ethtool's get

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <1706789109-36556-1-git-send-email-wangyunjian@huawei.com>
Date: Thu, 1 Feb 2024 20:05:09 +0800
From: Yunjian Wang <wangyunjian@...wei.com>
To: <willemdebruijn.kernel@...il.com>, <jasowang@...hat.com>,
	<kuba@...nel.org>, <davem@...emloft.net>
CC: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<xudingke@...wei.com>, Yunjian Wang <wangyunjian@...wei.com>
Subject: [PATCH net-next] tun: Implement ethtool's get_channels() callback

Implement the tun .get_channels functionality. This feature is necessary
for some tools, such as libxdp, which need to retrieve the queue count.

Signed-off-by: Yunjian Wang <wangyunjian@...wei.com>
---
 drivers/net/tun.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index afa5497f7c35..7cf448ff93ee 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -3638,12 +3638,22 @@ static int tun_set_coalesce(struct net_device *dev,
 	return 0;
 }
 
+static void tun_get_channels(struct net_device *dev,
+			     struct ethtool_channels *channels)
+{
+	struct tun_struct *tun = netdev_priv(dev);
+
+	channels->combined_count = tun->numqueues;
+	channels->max_combined = MAX_TAP_QUEUES;
+}
+
 static const struct ethtool_ops tun_ethtool_ops = {
 	.supported_coalesce_params = ETHTOOL_COALESCE_RX_MAX_FRAMES,
 	.get_drvinfo	= tun_get_drvinfo,
 	.get_msglevel	= tun_get_msglevel,
 	.set_msglevel	= tun_set_msglevel,
 	.get_link	= ethtool_op_get_link,
+	.get_channels   = tun_get_channels,
 	.get_ts_info	= ethtool_op_get_ts_info,
 	.get_coalesce   = tun_get_coalesce,
 	.set_coalesce   = tun_set_coalesce,
-- 
2.33.0