[Bridge] [PATCH net] bridge: Netlink interface fix.

[Jakub Kicinski]

On Thu, 8 Oct 2020 10:18:09 +0000 Nikolay Aleksandrov wrote:
> On Wed, 2020-10-07 at 14:49 +0000, Nikolay Aleksandrov wrote:
> > On Wed, 2020-10-07 at 12:07 +0000, Henrik Bjoernlund wrote:  
> > > This commit is correcting NETLINK br_fill_ifinfo() to be able to
> > > handle 'filter_mask' with multiple flags asserted.
> > > 
> > > Fixes: 36a8e8e265420 ("bridge: Extend br_fill_ifinfo to return MPR status")
> > > 
> > > Signed-off-by: Henrik Bjoernlund <henrik.bjoernlund at microchip.com>
> > > Reviewed-by: Horatiu Vultur <horatiu.vultur at microchip.com>
> > > Suggested-by: Nikolay Aleksandrov <nikolay at nvidia.com>
> > > Tested-by: Horatiu Vultur <horatiu.vultur at microchip.com>
> > > ---
> > >  net/bridge/br_netlink.c | 26 +++++++++++---------------
> > >  1 file changed, 11 insertions(+), 15 deletions(-)
> > >   
> > 
> > The patch looks good, please don't separate the Fixes tag from the others.
> > Acked-by: Nikolay Aleksandrov <nikolay at nvidia.com>
> >   
> 
> TBH, this does change a user facing api (the attribute nesting), but I think
> in this case it's acceptable due to the format being wrong and MRP being new, so
> I doubt anyone is yet dumping it mixed with vlan filter_mask and checking for
> two identical attributes, i.e. in the old/broken case parsing the attributes
> into a table would hide one of them and you'd have to walk over all attributes
> to catch that.

To be clear - this changes the uAPI as far as 5.9-rcs are concerned. 
So if this change was to hit 5.9 final there would be no uAPI breakage,
right?