linux-kernel - Re: [PATCHv11 net-next 2/2] openvswitch: Add support for unique flow IDs.

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Message-ID: <CANr6G5z-kokWkBs3bb=bXrBmBUhaqHKH1QfeXycFWxSNf00qFw@mail.gmail.com>
Date:	Wed, 3 Dec 2014 10:47:26 -0800
From:	Joe Stringer <joestringer@...ira.com>
To:	Pravin Shelar <pshelar@...ira.com>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>,
	"dev@...nvswitch.org" <dev@...nvswitch.org>,
	Linux Netdev List <netdev@...r.kernel.org>
Subject: Re: [PATCHv11 net-next 2/2] openvswitch: Add support for unique flow IDs.

I forgot to mention that this is the first post based against net-next.

On 2 December 2014 at 18:56, Joe Stringer <joestringer@...ira.com> wrote:
> <....snip...>
> diff --git a/net/openvswitch/flow.h b/net/openvswitch/flow.h
> index a8b30f3..7f31dbf 100644
> --- a/net/openvswitch/flow.h
> +++ b/net/openvswitch/flow.h
> @@ -197,6 +197,13 @@ struct sw_flow_match {
>         struct sw_flow_mask *mask;
>  };
>
> +#define MAX_UFID_LENGTH 256
> +
> +struct sw_flow_id {
> +       u32 ufid_len;
> +       u32 ufid[MAX_UFID_LENGTH / 4];
> +};
> +
>  struct sw_flow_actions {
>         struct rcu_head rcu;
>         u32 actions_len;

Pravin, I changed the 'struct sw_flow_id' to the above after feedback
from the previous round, but it doesn't seem quite right. Is this what
you meant? Given that current ovs-vswitchd userspace only generates
128bit UFIDs, it seems wasteful to be allocating so much for this. Did
you have in mind for this to be united with the unmasked_key?
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