Re: [PATCH] Re-define PKT_PROT_LEN to be bigger.

[Jeremy Fitzhardinge <jeremy@goop.org>]

On 12/14/2010 12:35 PM, Paul Durrant wrote:
> Re-define PKT_PROT_LEN to be big enough to handle maximal IPv4 and TCP options and phrase
> the definition so that it's reasonably obvious that's what it's for.

Which kernel are these for?

Thanks,
    J

> Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
> ---
>  drivers/xen/netback/netback.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/xen/netback/netback.c b/drivers/xen/netback/netback.c
> index c448675..1a4a20e 100644
> --- a/drivers/xen/netback/netback.c
> +++ b/drivers/xen/netback/netback.c
> @@ -128,7 +128,7 @@ static inline int netif_get_page_ext(struct page *pg, unsigned int *_group, unsi
>   * packet processing on them (netfilter, routing, etc). 72 is enough
>   * to cover TCP+IP headers including options.
>   */
> -#define PKT_PROT_LEN 72
> +#define PKT_PROT_LEN    (ETH_HLEN + 4 + (15 * 4) + (15 * 4))
>  
>  static inline pending_ring_idx_t pending_index(unsigned i)
>  {