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net/hsr: add interlink to fill_info output

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Currently, it is possible to configure the interlink
port, but no way to read it back from userspace.

Add it to the output of hsr_fill_info(), so it can be
read from userspace, for example:

$ ip -d link show hsr0
12: hsr0: <BROADCAST,MULTICAST> mtu ...
...
hsr slave1 veth0 slave2 veth1 interlink veth2 ...

Signed-off-by: Jan Vaclav <jvaclav@redhat.com>
Reviewed-by: Fernando Fernandez Mancera <fmancera@suse.de>
Link: https://patch.msgid.link/20251015101001.25670-2-jvaclav@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jan Vaclav
2025-10-15 12:10:02 +02:00
committed by Jakub Kicinski
parent e104852075
commit f18c231fb1
1 changed files with 6 additions and 0 deletions
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6
net/hsr/hsr_netlink.c
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@@ -160,6 +160,12 @@ static int hsr_fill_info(struct sk_buff *skb, const struct net_device *dev)
goto nla_put_failure;
}
port = hsr_port_get_hsr(hsr, HSR_PT_INTERLINK);
if (port) {
if (nla_put_u32(skb, IFLA_HSR_INTERLINK, port->dev->ifindex))
goto nla_put_failure;
}
if (nla_put(skb, IFLA_HSR_SUPERVISION_ADDR, ETH_ALEN,
hsr->sup_multicast_addr) ||
nla_put_u16(skb, IFLA_HSR_SEQ_NR, hsr->sequence_nr))