[dpdk-dev] [PATCH] ip_frag: fix ipv6 when MTU sizes not aligned to 8 bytes

[Luca Boccassi]

On Mon, 2018-11-26 at 23:56 -0500, Chas Williams wrote:
> From: Chas Williams <chas3 at att.com>
> 
> The same issue was fixed on for the ipv4 version of this routine in
> commit 8d4d3a4f7337 ("ip_frag: handle MTU sizes not aligned to 8
> bytes").
> Briefly, the size of an ipv6 header is always 40 bytes.  With an MTU
> of
> 1500, this will never produce a multiple of 8 bytes for the frag_size
> and this routine can never succeed. Since RTE_ASSERTS are disabled by
> default, this failure is tpyically ignored.
> 
> To fix this, round down to the nearest 8 bytes and use this when
> producing the fragments.
> 
> Fixes: 0aa31d7a5929 ("ip_frag: add IPv6 fragmentation support")
> 
> Signed-off-by: Chas Williams <chas3 at att.com>
> ---
>  lib/librte_ip_frag/rte_ip_frag.h            |  1 +
>  lib/librte_ip_frag/rte_ipv6_fragmentation.c | 18 +++++++++++-------
>  2 files changed, 12 insertions(+), 7 deletions(-)

Acked-by: Luca Boccassi <bluca at debian.org>

-- 
Kind regards,
Luca Boccassi