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Tue, 15 Apr 2025 04:17:29 -0700 (PDT) From: Antonio Quartulli Date: Tue, 15 Apr 2025 13:17:21 +0200 Subject: [PATCH net-next v26 04/23] ovpn: keep carrier always on for MP interfaces Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250415-b4-ovpn-v26-4-577f6097b964@openvpn.net> References: <20250415-b4-ovpn-v26-0-577f6097b964@openvpn.net> In-Reply-To: <20250415-b4-ovpn-v26-0-577f6097b964@openvpn.net> To: netdev@vger.kernel.org, Eric Dumazet , Jakub Kicinski , Paolo Abeni , Donald Hunter , Antonio Quartulli , Shuah Khan , sd@queasysnail.net, ryazanov.s.a@gmail.com, Andrew Lunn Cc: Simon Horman , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Xiao Liang X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1339; i=antonio@openvpn.net; h=from:subject:message-id; bh=7WU3xSRBMuXGHUG7i/5ocEV9C8YkxglpMrWb+0YdQF8=; b=owEBbQGS/pANAwAIAQtw5TqgONWHAcsmYgBn/kBBifGDIvfJdm1s+alp1EiBkjhaP4U4WT4sy lHHyAsr6sCJATMEAAEIAB0WIQSZq9xs+NQS5N5fwPwLcOU6oDjVhwUCZ/5AQQAKCRALcOU6oDjV hzFYB/9+kmSw8/ryifu1DvtlDiB3y7rrrRvka0hGy7d8SQR1mvJy8Y1dMMnCsIHEyUq5Vpa4p6X 8EHWQ7BvzMBaOMs6yK3H7D6OFjNMJLy3qqfvG2sCaUqkAju06lE0Z0Mrn8TiK6BqeuCr/MhXPuE iNuUcS/XFic6a3eDrXRgxjIMeUKQ+WZT6Wgc6h1+i5CH+bORRvdow0QbTN73gcwAC0Y1cHsHyki 1PZVz/DfSaFvHoD4irLcBXCw8Q/GkLv3D7+rFCCNYz+IjXlTAEybCvuRH80Sv8vixCI7ton3mod veIo9bznHYc5pT1CYc8YrWTYojVDb2sQosIW7A/BuyCYA1Yq X-Developer-Key: i=antonio@openvpn.net; a=openpgp; fpr=CABDA1282017C267219885C748F0CCB68F59D14C 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 --- drivers/net/ovpn/main.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/drivers/net/ovpn/main.c b/drivers/net/ovpn/main.c index ea7dad374c0088cab46282c61cd8fef65bab0d5c..fa1dd84be24060d6dc749dc9e09= 7f166a7adea26 100644 --- a/drivers/net/ovpn/main.c +++ b/drivers/net/ovpn/main.c @@ -93,10 +93,18 @@ static int ovpn_newlink(struct net_device *dev, ovpn->dev =3D dev; ovpn->mode =3D mode; =20 - /* turn carrier explicitly off after registration, this way state is - * clearly defined + /* Set carrier explicitly after registration, this way state is + * clearly defined. + * + * In case of MP interfaces we keep the carrier always on. + * + * Carrier for P2P interfaces is initially off and it is then + * switched on and off when the remote peer is added or deleted. */ - netif_carrier_off(dev); + if (ovpn->mode =3D=3D OVPN_MODE_MP) + netif_carrier_on(dev); + else + netif_carrier_off(dev); =20 return register_netdevice(dev); } --=20 2.49.0