[ovs-dev] [PATCH v2 06/19] bundles: Validate bundled messages.

[Jarno Rajahalme]

> On May 29, 2015, at 5:38 PM, Ben Pfaff <blp at nicira.com> wrote:
> 
> On Mon, May 18, 2015 at 04:10:15PM -0700, Jarno Rajahalme wrote:
>> OpenFlow bundle messages should be decoded and validated at the time
>> they are added to the bundle.  This commit does this for flow mod and
>> port mod messages.
>> 
>> Signed-off-by: Jarno Rajahalme <jrajahalme at nicira.com>
> 
> It's pretty expensive to give every ofp_bundle_entry a 1-kB stub for
> actions, when there might be many thousands of them allocated at a time
> into a bundle.  It might be better to accumulate the actions into a
> function-local stub then use ofpbuf_clone() or similar to allocate a
> correctly sized buffer for ofp_bundle_entry.
> 
> I guess that it would be even cheaper, memory-wise (struct match by
> itself is almost 1/2 kB!), to just decode the raw message a second time
> when we apply the bundle, but maybe that is not worth the extra trouble.

I’ll look if I can get the actual replacement rule created at the validation time for the versioned case (after patch 17). For this patch, I’ll just make the stub smaller (64 bytes?).