On Tue, Dec 18, 2012 at 11:52:10AM -0800, Romain Lenglet wrote:
> Signed-off-by: Romain Lenglet <rleng...@vmware.com>
...
> +/* Compose SAMPLE action for sFlow or IPFIX. */
It would probably be better to document the usage of parameters here, at
the top of the function, rather than with the comment
> + /* Number of packets out of UINT_MAX to sample. */
later on in the middle of the function. (I realize you're just moving
existing code around, but we might as well improve it as we go.)
Also, s/UINT_MAX/UINT32_MAX/ since this is specifically 32-bit.
> @@ -5841,6 +5879,21 @@ xlate_fin_timeout(struct action_xlate_ctx *ctx,
> }
> }
>
> +static void
> +xlate_sample_ipfix_action(struct action_xlate_ctx *ctx,
> + const struct ofpact_sample_ipfix *osi)
> +{
> + if (osi->probability > 0) {
> + union user_action_cookie cookie;
> + /* Scale the probability from 16-bit to 32-bit while
> + * representing the exact same percentage. */
> + uint32_t probability = osi->probability << 16 | osi->probability;
I'd find it reassuring to add ():
uint32_t probability = (osi->probability << 16) | osi->probability;
> + compose_ipfix_cookie(osi->probability, osi->obs_point_id, &cookie);
> + compose_sample_action(ctx->ofproto, ctx->odp_actions, &ctx->flow,
> + probability, &cookie);
> + }
> +}
Again, this patch leaves the implementation incomplete, so it might
ultimately be better to squash it with other patches.
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