netdev - Re: [PATCH net-next v3 1/2] bridge: netlink: make setlink/dellink notifications more accurate

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Message-ID: <3a9ba7b5-802c-7907-b91d-be076d448e78@cumulusnetworks.com>
Date:   Thu, 26 Oct 2017 11:25:21 +0300
From:   Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
To:     Stephen Hemminger <stephen@...workplumber.org>
Cc:     netdev@...r.kernel.org, dsa@...ulusnetworks.com, mrv@...atatu.com,
        davem@...emloft.net, bridge@...ts.linux-foundation.org,
        roopa@...ulusnetworks.com
Subject: Re: [PATCH net-next v3 1/2] bridge: netlink: make setlink/dellink
 notifications more accurate

On 26/10/17 11:17, Stephen Hemminger wrote:
> On Thu, 26 Oct 2017 00:59:41 +0300
> Nikolay Aleksandrov <nikolay@...ulusnetworks.com> 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@...ulusnetworks.com>
> 
> 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@...workplumber.org>
> 

Stephen, thank you for the review. Could you please send the ack to
v4 of this set ? Since it's already sent, I can't add it myself.

Thanks,
 Nik