Thread (37 messages) 37 messages, 3 authors, 2024-12-17

[PATCH net-next v15 04/22] ovpn: keep carrier always on for MP interfaces

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From: Antonio Quartulli <antonio@openvpn.net>
Date: 2024-12-11 21:32:51
Also in: linux-kselftest, lkml
Subsystem: networking drivers, openvpn data channel offload, the rest · Maintainers: Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Antonio Quartulli, Linus Torvalds

Revision v15 of 25 in this series.

Revisions (25)
  1. v2 [diff vs current]
  2. v3 [diff vs current]
  3. v4 [diff vs current]
  4. v5 [diff vs current]
  5. v6 [diff vs current]
  6. v7 [diff vs current]
  7. v8 [diff vs current]
  8. v9 [diff vs current]
  9. v10 [diff vs current]
  10. v11 [diff vs current]
  11. v12 [diff vs current]
  12. v13 [diff vs current]
  13. v14 [diff vs current]
  14. v15 current
  15. v16 [diff vs current]
  16. v17 [diff vs current]
  17. v18 [diff vs current]
  18. v19 [diff vs current]
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  20. v21 [diff vs current]
  21. v22 [diff vs current]
  22. v23 [diff vs current]
  23. v24 [diff vs current]
  24. v25 [diff vs current]
  25. v26 [diff vs current]
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@openvpn.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 60954c5b2b9254db1d24d01ac383935765c7ce5b..274d6166741ef2d6275a252d0c042bc66f8f41f7 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;
 }
-- 
2.45.2
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