[dpdk-dev] [PATCH V4] doc: add GRO API limitations in prog_guide
Varghese, Vipin
vipin.varghese at intel.com
Wed Jan 9 05:25:22 CET 2019
Hi Jiayu Hu,
A request to information, why there is document update patch with code update patch shared?
As per DPDK 19.02-rc1 both code and document should be one patch. Can you share the code patch reference if it was applied before 19.02-rc1?
Thanks
Vipin Varghese
> -----Original Message-----
> From: dev <dev-bounces at dpdk.org> On Behalf Of Jiayu Hu
> Sent: Wednesday, January 9, 2019 8:30 AM
> To: dev at dpdk.org
> Cc: stephen at networkplumber.org; Ananyev, Konstantin
> <konstantin.ananyev at intel.com>; mb at smartsharesystems.com; Hu, Jiayu
> <jiayu.hu at intel.com>; stable at dpdk.org
> Subject: [dpdk-dev] [PATCH V4] doc: add GRO API limitations in prog_guide
>
> This patch adds GRO API limitations in the programmer guide.
>
> Fixes: 2c900d09055e ("doc: add GRO guide")
> Fixes: 9e0b9d2ec0f4 ("gro: support VxLAN GRO")
> Cc: stable at dpdk.org
>
> Signed-off-by: Jiayu Hu <jiayu.hu at intel.com>
> ---
> changes in v4:
> - update MBUF->l2_len/... requirement
> changes in v3:
> - add MBUF limitation
> changes in v2:
> - add fix versions
> - add more limitations
>
> doc/guides/prog_guide/generic_receive_offload_lib.rst | 17
> +++++++++++++++++
> 1 file changed, 17 insertions(+)
>
> diff --git a/doc/guides/prog_guide/generic_receive_offload_lib.rst
> b/doc/guides/prog_guide/generic_receive_offload_lib.rst
> index 9c6a4d0..53c9d5c 100644
> --- a/doc/guides/prog_guide/generic_receive_offload_lib.rst
> +++ b/doc/guides/prog_guide/generic_receive_offload_lib.rst
> @@ -191,3 +191,20 @@ Header fields deciding if packets are neighbors
> include:
> ignore IPv4 ID fields for the packets whose DF bit is 1.
> Additionally, packets which have different value of DF bit can't
> be merged.
> +
> +GRO Library Limitations
> +-----------------------
> +
> +- GRO library uses the values of MBUF->l2_len/l3_len/l4_len/
> + outer_l2_len/outer_l3_len to get protocol headers for the
> + input packet, rather than parsing the packet header. Therefore,
> + before call GRO APIs to merge packets, user applications
> + must set MBUF->l2_len/l3_len/l4_len/outer_l2_len/outer_l3_len
> + to the same values as the protocol headers of the packet.
> +
> +- GRO library doesn't support to process packets with IPv4 Options.
> +
> +- GRO library just supports to process the packet organized
> + in a single MBUF. If the input packet consists of multiple
> + MBUFs (i.e. chained MBUFs), GRO reassembly behaviors are
> + unknown.
> --
> 2.7.4
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