Re: [dpdk-dev] [PATCH] librte_mbuf: modify the port initialization value

[Stephen Hemminger <stephen@networkplumber.org>]

On Mon,  4 Sep 2017 14:55:32 +0800
Zhiyong Yang <zhiyong.yang@intel.com> wrote:

> In order to support more than 256 virtual ports, the field "port" in
> rte_mbuf has been increased to 16 bits. The initialization/reset
> value of the field "port" should be changed from 0xff to 0xffff
> accordingly.
> 
> Signed-off-by: Zhiyong Yang <zhiyong.yang@intel.com>
> ---
>  lib/librte_mbuf/rte_mbuf.c | 2 +-
>  lib/librte_mbuf/rte_mbuf.h | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/lib/librte_mbuf/rte_mbuf.c b/lib/librte_mbuf/rte_mbuf.c
> index 26a62b8e1..2e80ed9b1 100644
> --- a/lib/librte_mbuf/rte_mbuf.c
> +++ b/lib/librte_mbuf/rte_mbuf.c
> @@ -144,7 +144,7 @@ rte_pktmbuf_init(struct rte_mempool *mp,
>  	/* init some constant fields */
>  	m->pool = mp;
>  	m->nb_segs = 1;
> -	m->port = 0xff;
> +	m->port = 0xffff;
>  	rte_mbuf_refcnt_set(m, 1);
>  	m->next = NULL;
>  }
> diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
> index eaed7eee0..cdc70aa83 100644
> --- a/lib/librte_mbuf/rte_mbuf.h
> +++ b/lib/librte_mbuf/rte_mbuf.h
> @@ -1095,7 +1095,7 @@ static inline void rte_pktmbuf_reset(struct rte_mbuf *m)
>  	m->vlan_tci = 0;
>  	m->vlan_tci_outer = 0;
>  	m->nb_segs = 1;
> -	m->port = 0xff;
> +	m->port = 0xffff;
>  
>  	m->ol_flags = 0;
>  	m->packet_type = 0;

Maybe introduce MBUF_INVALID_PORT as a constant?

#define MBUF_INVALID_PORT  0xffff