diff mbox series

[RFC,3/6] rtnetlink: fill IFLA_PARENT_DEV_NAME on link dump

Message ID 20210603044954.8091-4-ryazanov.s.a@gmail.com (mailing list archive)
State RFC
Delegated to: Netdev Maintainers
Headers show
Series WWAN netdev creation framework tweaks | expand

Checks

Context Check Description
netdev/tree_selection success Guessing tree name failed - patch did not apply

Commit Message

Sergey Ryazanov June 3, 2021, 4:49 a.m. UTC 
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 <ryazanov.s.a@gmail.com>
---
 net/core/rtnetlink.c | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series

Patch

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;