From: Ben Pfaff <blp@nicira•com>
To: Simon Horman <simon.horman@netronome•com>
Cc: dev@openvswitch•org, netdev@vger•kernel.org
Subject: Re: [ovs-dev] [PATCH/RFC repost 2/8] netlink: Allow suppression of warnings for duplicate attributes
Date: Fri, 10 Oct 2014 08:31:26 -0700 [thread overview]
Message-ID: <20141010153126.GC17859@nicira.com> (raw)
In-Reply-To: <20141009011831.GF9339@vergenet.net>
On Thu, Oct 09, 2014 at 10:18:32AM +0900, Simon Horman wrote:
> On Fri, Sep 26, 2014 at 04:55:42PM -0700, Ben Pfaff wrote:
> > On Thu, Sep 18, 2014 at 10:55:05AM +0900, Simon Horman wrote:
> > > Add a multiple field to struct nl_policy which if set suppresses
> > > warning of duplicate attributes in nl_parse_nested().
> > >
> > > As is the case without this patch only the last occurrence of an
> > > attribute is stored in attrs by nl_parse_nested(). As such
> > > if the multiple field of struct nl_policy is set then it
> > > is up to the caller to parse the message to extract all the attributes.
> > >
> > > This is in preparation for allowing multiple OVS_SELECT_GROUP_ATTR_BUCKET
> > > attributes in a nested OVS_ACTION_ATTR_SELECT_GROUP attribute.
> > >
> > > Signed-off-by: Simon Horman <simon.horman@netronome•com>
> >
> > In the other case where we have duplicate attributes, it doesn't make
> > sense to process them with the policy functions, because we want to
> > see all of the instances of the duplicate attributes and policy
> > doesn't allow us to do that. I'm a little surprised that the new
> > attributes work differently. What's the idea?
>
> My idea was to use the policy to obtain the attributes that
> may not be duplicated. And then custom code to pick up all the
> instances of attributes that may be duplicated.
>
> I'm don't feel strongly about that approach and I'd be just has
> happy to drop this patch and rework things a little so that
> all the attributes are picked out by custom code. It sounds
> like that would match the approach taken elsewhere. Sorry for
> not noticing that earlier.
I see.
That's more like the approach used elsewhere, yes, but in those cases
there wasn't anything (if I recall correctly) that could be usefully
done with the policy parser, so it wasn't considered as an option. If
the group buckets are different then maybe a different treatment is
warranted.
next prev parent reply other threads:[~2014-10-10 15:30 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-18 1:55 [PATCH/RFC repost 0/8] Open vSwtich ODP Select Group Action Simon Horman
2014-09-18 1:55 ` [PATCH/RFC repost 1/8] odp: select group action attributes Simon Horman
2014-09-18 1:55 ` [PATCH/RFC repost 2/8] netlink: Allow suppression of warnings for duplicate attributes Simon Horman
[not found] ` <1411005311-11752-3-git-send-email-simon.horman-wFxRvT7yatFl57MIdRCFDg@public.gmane.org>
2014-09-26 23:55 ` Ben Pfaff
2014-10-09 1:18 ` [ovs-dev] " Simon Horman
2014-10-10 15:31 ` Ben Pfaff [this message]
2014-09-18 1:55 ` [PATCH/RFC repost 3/8] odp-util: formatting of datapath select group action Simon Horman
[not found] ` <1411005311-11752-4-git-send-email-simon.horman-wFxRvT7yatFl57MIdRCFDg@public.gmane.org>
2014-09-19 13:44 ` Thomas Graf
2014-09-24 4:55 ` Simon Horman
2014-09-18 1:55 ` [PATCH/RFC repost 4/8] datapath: execution of " Simon Horman
[not found] ` <1411005311-11752-5-git-send-email-simon.horman-wFxRvT7yatFl57MIdRCFDg@public.gmane.org>
2014-09-19 14:05 ` Thomas Graf
2014-09-24 6:01 ` Simon Horman
2014-09-24 8:19 ` Thomas Graf
2014-09-25 4:43 ` Simon Horman
2014-09-18 1:55 ` [PATCH/RFC repost 5/8] datapath: Move last_action() helper to datapath.h Simon Horman
[not found] ` <1411005311-11752-6-git-send-email-simon.horman-wFxRvT7yatFl57MIdRCFDg@public.gmane.org>
2014-09-19 14:06 ` Thomas Graf
2014-09-24 6:00 ` Simon Horman
[not found] ` <20140924060013.GB13314-IxS8c3vjKQDk1uMJSBkQmQ@public.gmane.org>
2014-09-24 8:20 ` Thomas Graf
2014-09-25 4:42 ` Simon Horman
2014-09-18 1:55 ` [PATCH/RFC repost 6/8] datapath: validation of select group action Simon Horman
2014-09-18 1:55 ` [PATCH/RFC repost 7/8] ofproto: translate datapath " Simon Horman
[not found] ` <1411005311-11752-8-git-send-email-simon.horman-wFxRvT7yatFl57MIdRCFDg@public.gmane.org>
2014-09-26 23:57 ` Ben Pfaff
2014-10-09 1:14 ` [ovs-dev] " Simon Horman
2014-10-13 20:46 ` Ben Pfaff
2014-10-14 4:54 ` Simon Horman
2014-09-18 1:55 ` [PATCH/RFC repost 8/8] hack: ofproto: enable odp select action Simon Horman
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