Currently, it is possible to configure IFLA_HSR_VERSION, but there is no way to check in userspace what the currently configured HSR protocol version is. Add it to the output of hsr_fill_info(). This info could then be used by e.g. ip(8), like so: $ ip -d link show hsr0 12: hsr0: mtu ... ... hsr slave1 veth0 slave2 veth1 ... proto 0 version 1 Signed-off-by: Jan Vaclav --- v2: Added an example to the commit message to show how userspace programs could use this property. v1: https://lore.kernel.org/netdev/20250918125337.111641-2-jvaclav@redhat.com/ net/hsr/hsr_netlink.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/hsr/hsr_netlink.c b/net/hsr/hsr_netlink.c index b12047024..3d0bd24c6 100644 --- a/net/hsr/hsr_netlink.c +++ b/net/hsr/hsr_netlink.c @@ -166,6 +166,8 @@ static int hsr_fill_info(struct sk_buff *skb, const struct net_device *dev) goto nla_put_failure; if (hsr->prot_version == PRP_V1) proto = HSR_PROTOCOL_PRP; + if (nla_put_u8(skb, IFLA_HSR_VERSION, hsr->prot_version)) + goto nla_put_failure; if (nla_put_u8(skb, IFLA_HSR_PROTOCOL, proto)) goto nla_put_failure; -- 2.51.0