On Thu, 26 Oct 2017 00:59:41 +0300 Nikolay Aleksandrov <nikolay@xxxxxxxxxxxxxxxxxxx> wrote: > Before this patch we had cases that either sent notifications when there > were in fact no changes (e.g. non-existent vlan delete) or didn't send > notifications when there were changes (e.g. vlan add range with an error in > the middle, port flags change + vlan update error). This patch sends down > a boolean to the functions setlink/dellink use and if there is even a > single configuration change (port flag, vlan add/del, port state) then > we always send a notification. This is all done to keep backwards > compatibility with the opportunistic vlan delete, where one could > specify a vlan range that has missing vlans inside and still everything > in that range will be cleared, this is mostly used to clear the whole > vlan config with a single call, i.e. range 1-4094. > > Signed-off-by: Nikolay Aleksandrov <nikolay@xxxxxxxxxxxxxxxxxxx> This looks correct. As a general note, generating a notice with no change should be ok for a correctly written application. But missing a notification would cause synchronization problems. Acked-by: Stephen Hemminger <stephen@xxxxxxxxxxxxxxxxxx>