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rtnl: Add support for netdev event to link messages

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When netdev events happen, a rtnetlink_event() handler will send
messages for every event in it's white list.  These messages contain
current information about a particular device, but they do not include
the iformation about which event just happened.  The consumer of
the message has to try to infer this information.  In some cases
(ex: NETDEV_NOTIFY_PEERS), that is not possible.

This patch adds a new extension to RTM_NEWLINK message called IFLA_EVENT
that would have an encoding of the which event triggered this
message.  This would allow the the message consumer to easily determine
if it is interested in a particular event or not.

Signed-off-by: Vladislav Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vlad Yasevich
2017-04-04 09:23:42 -04:00
committed by David S. Miller
parent 5138e86f17
commit def12888c1
4 changed files with 107 additions and 11 deletions
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2
net/core/dev.c
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@@ -6840,7 +6840,7 @@ static void rollback_registered_many(struct list_head *head)
if (!dev->rtnl_link_ops ||
dev->rtnl_link_state == RTNL_LINK_INITIALIZED)
skb = rtmsg_ifinfo_build_skb(RTM_DELLINK, dev, ~0U,
skb = rtmsg_ifinfo_build_skb(RTM_DELLINK, dev, ~0U, 0,
GFP_KERNEL);
/*