netdev - [PATCH net-next v19 04/26] ovpn: keep carrier always on for MP interfaces

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

Message-Id: <20250211-b4-ovpn-v19-4-86d5daf2a47a@openvpn.net>
Date: Tue, 11 Feb 2025 01:39:57 +0100
From: Antonio Quartulli <antonio@...nvpn.net>
To: netdev@...r.kernel.org, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Donald Hunter <donald.hunter@...il.com>, 
 Antonio Quartulli <antonio@...nvpn.net>, Shuah Khan <shuah@...nel.org>, 
 sd@...asysnail.net, ryazanov.s.a@...il.com, 
 Andrew Lunn <andrew+netdev@...n.ch>
Cc: Simon Horman <horms@...nel.org>, linux-kernel@...r.kernel.org, 
 linux-kselftest@...r.kernel.org, Xiao Liang <shaw.leon@...il.com>
Subject: [PATCH net-next v19 04/26] ovpn: keep carrier always on for MP
 interfaces

An ovpn interface configured in MP mode will keep carrier always
on and let the user decide when to bring it administratively up and
down.

This way a MP node (i.e. a server) will keep its interface always
up and running, even when no peer is connected.

Signed-off-by: Antonio Quartulli <antonio@...nvpn.net>
---
 drivers/net/ovpn/main.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/net/ovpn/main.c b/drivers/net/ovpn/main.c
index 14dad1732f31445d53cb2dbd5c592e8c3f11ef94..64f845ec13499a72a8586fe6af035aabd6884505 100644
--- a/drivers/net/ovpn/main.c
+++ b/drivers/net/ovpn/main.c
@@ -23,6 +23,15 @@
 
 static int ovpn_net_open(struct net_device *dev)
 {
+	struct ovpn_priv *ovpn = netdev_priv(dev);
+
+	/* carrier for P2P interfaces is switched on and off when
+	 * the peer is added or deleted.
+	 *
+	 * in case of P2MP interfaces we just keep the carrier always on
+	 */
+	if (ovpn->mode == OVPN_MODE_MP)
+		netif_carrier_on(dev);
 	netif_tx_start_all_queues(dev);
 	return 0;
 }

-- 
2.45.3