From: David S. Miller Date: Sun, 22 Jul 2018 17:52:37 +0000 (-0700) Subject: Merge branch 'vxlan-fix-default-fdb-entry-user-space-notify-ordering-race' X-Git-Tag: v4.19~571^2~15 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0fb8d5a030db52a184eca49320e5f4ff8dacd61d;p=platform%2Fkernel%2Flinux-rpi3.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 --- 0fb8d5a030db52a184eca49320e5f4ff8dacd61d