Re: [dpdk-dev] [PATCH] rte_reorder: Allow sequence numbers > 0 as starting point

["Gonzalez Monroy, Sergio" <sergio.gonzalez.monroy@intel.com>]

On 20/05/2015 12:02, Simon Kagstrom wrote:
> We use sequence numbers from a generator which has potentially started
> long before the receiver. Therefore, the first number will typically
> be > 0. The rte_reorder code will not work in this case, since the
> packet is seen as outside of the buffer.
>
> The patch instead records the first sequence number inserted as the
> starting point.
>
> Signed-off-by: Simon Kagstrom <simon.kagstrom@netinsight.net>
> Signed-off-by: Johan Faltstrom <johan.faltstrom@netinsight.net>
> ---
>   lib/librte_reorder/rte_reorder.c | 8 ++++++++
>   1 file changed, 8 insertions(+)
>
> diff --git a/lib/librte_reorder/rte_reorder.c b/lib/librte_reorder/rte_reorder.c
> index dc0e806..4d6449e 100644
> --- a/lib/librte_reorder/rte_reorder.c
> +++ b/lib/librte_reorder/rte_reorder.c
> @@ -73,6 +73,8 @@ struct rte_reorder_buffer {
>   	unsigned int memsize; /**< memory area size of reorder buffer */
>   	struct cir_buffer ready_buf; /**< temp buffer for dequeued entries */
>   	struct cir_buffer order_buf; /**< buffer used to reorder entries */
> +
> +	int is_initialized;
>   } __rte_cache_aligned;
>   
>   static void
> @@ -325,6 +327,12 @@ rte_reorder_insert(struct rte_reorder_buffer *b, struct rte_mbuf *mbuf)
>   	uint32_t offset, position;
>   	struct cir_buffer *order_buf = &b->order_buf;
>   
> +	if (!b->is_initialized) {
> +	    b->min_seqn = mbuf->seqn;
> +
> +	    b->is_initialized = 1;
> +	}
> +
>   	/*
>   	 * calculate the offset from the head pointer we need to go.
>   	 * The subtraction takes care of the sequence number wrapping.

Acked-by: Sergio Gonzalez Monroy <sergio.gonzalez.monroy@intel.com>