From: David S. Miller Date: Sat, 7 Jul 2018 11:20:46 +0000 (+0900) Subject: Merge branch 'vxlan-fix-default-fdb-entry-user-space-notify-ordering-race' X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=a2f1483b91470804f37ce8fc69b48e8e5635c36f;p=openwrt%2Fstaging%2Fblogic.git Merge branch 'vxlan-fix-default-fdb-entry-user-space-notify-ordering-race' Roopa Prabhu says: ==================== vxlan: fix default fdb entry user-space notify ordering/race Problem: In vxlan_newlink, a default fdb entry is added before register_netdev. The default fdb creation function notifies user-space of the fdb entry on the vxlan device which user-space does not know about yet. (RTM_NEWNEIGH goes before RTM_NEWLINK for the same ifindex). This series fixes the user-space netlink notification ordering issue with the following changes: - decouple fdb notify from fdb create. - Move fdb notify after register_netdev. - modify rtnl_configure_link to allow configuring a link early. - Call rtnl_configure_link in vxlan newlink handler to notify userspace about the newlink before fdb notify and hence avoiding the user-space race. ==================== Fixes: afbd8bae9c79 ("vxlan: add implicit fdb entry for default destination") Signed-off-by: Roopa Prabhu --- a2f1483b91470804f37ce8fc69b48e8e5635c36f