From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jiayu Hu Subject: [PATCH v2] doc: add GRO API limitations in prog_guide Date: Wed, 26 Dec 2018 12:04:33 +0800 Message-ID: <1545797073-24844-1-git-send-email-jiayu.hu@intel.com> References: <1545107119-85376-1-git-send-email-jiayu.hu@intel.com> Cc: thomas@monjalon.net, Jiayu Hu , stable@dpdk.org To: dev@dpdk.org Return-path: In-Reply-To: <1545107119-85376-1-git-send-email-jiayu.hu@intel.com> List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" This patch adds GRO API limitations in the programmer guide. Fixes: 2c900d09055e ("doc: add GRO guide") Fixes: 9e0b9d2ec0f4 ("gro: support VxLAN GRO") Cc: stable@dpdk.org Signed-off-by: Jiayu Hu --- changes in v2: - add fix versions - add more limitations doc/guides/prog_guide/generic_receive_offload_lib.rst | 11 +++++++++++ 1 file changed, 11 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..3873610 100644 --- a/doc/guides/prog_guide/generic_receive_offload_lib.rst +++ b/doc/guides/prog_guide/generic_receive_offload_lib.rst @@ -191,3 +191,14 @@ 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 directly uses the values of MBUF->l2_len/l3_len/l4_len/ + outer_l2_len/outer_l3_len to parse packet headers. In addition, + it relies on MBUF->pkt_len/data_len to process packets. Therefore, + to get correct reassembly results, applications must set correct + values to those MBUF metadata fields. + +- GRO library doesn't support to process packets with IPv4 option fields. -- 2.7.4