2021-06-03 04:52:33

by Sergey Ryazanov

[permalink] [raw]
Subject: [RFC 3/6] rtnetlink: fill IFLA_PARENT_DEV_NAME on link dump

Return a parent device using the FLA_PARENT_DEV_NAME attribute during
links dump. This should help a user figure out which links belong to a
particular HW device. E.g. what data channels exists on a specific WWAN
modem.

Signed-off-by: Sergey Ryazanov <[email protected]>
---
net/core/rtnetlink.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 56ac16abe0ba..120887c892de 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -1819,6 +1819,11 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb,
if (rtnl_fill_prop_list(skb, dev))
goto nla_put_failure;

+ if (dev->dev.parent &&
+ nla_put_string(skb, IFLA_PARENT_DEV_NAME,
+ dev_name(dev->dev.parent)))
+ goto nla_put_failure;
+
nlmsg_end(skb, nlh);
return 0;

--
2.26.3