[dpdk-dev] [PATCH v3 2/2] gro: support VxLAN GRO

Jiayu Hu jiayu.hu at intel.com
Mon Dec 25 07:36:17 CET 2017


Hi Junjie,

On Fri, Dec 22, 2017 at 04:17:50PM +0800, Chen, Junjie J wrote:
> Hi Jiayu
> 
> > -----Original Message-----
> > From: Hu, Jiayu
> > Sent: Friday, December 22, 2017 3:26 PM
> > To: dev at dpdk.org
> > Cc: Tan, Jianfeng <jianfeng.tan at intel.com>; Chen, Junjie J
> > <junjie.j.chen at intel.com>; Ananyev, Konstantin
> > <konstantin.ananyev at intel.com>; stephen at networkplumber.org; Yigit,
> > Ferruh <ferruh.yigit at intel.com>; Yao, Lei A <lei.a.yao at intel.com>; Hu, Jiayu
> > <jiayu.hu at intel.com>
> > Subject: [PATCH v3 2/2] gro: support VxLAN GRO
> > 
> > This patch adds a framework that allows GRO on tunneled packets.
> > Furthermore, it leverages that framework to provide GRO support for
> > VxLAN-encapsulated packets. Supported VxLAN packets must have an outer
> > IPv4 header, and contain an inner TCP/IPv4 packet.
> > 
> > VxLAN GRO doesn't check if input packets have correct checksums and
> > doesn't update checksums for output packets. Additionally, it assumes the
> > packets are complete (i.e., MF==0 && frag_off==0), when IP fragmentation is
> > possible (i.e., DF==0).
> > 
> > Signed-off-by: Jiayu Hu <jiayu.hu at intel.com>
> > ---
> >  .../prog_guide/generic_receive_offload_lib.rst     |  31 +-
> >  lib/librte_gro/Makefile                            |   1 +
> >  lib/librte_gro/gro_vxlan_tcp4.c                    | 515
> > +++++++++++++++++++++
> >  lib/librte_gro/gro_vxlan_tcp4.h                    | 184 ++++++++
> >  lib/librte_gro/rte_gro.c                           | 129 +++++-
> >  lib/librte_gro/rte_gro.h                           |   5 +-
> >  6 files changed, 837 insertions(+), 28 deletions(-)  create mode 100644
> > lib/librte_gro/gro_vxlan_tcp4.c  create mode 100644
> > lib/librte_gro/gro_vxlan_tcp4.h
> > 
> > diff --git a/doc/guides/prog_guide/generic_receive_offload_lib.rst
> > b/doc/guides/prog_guide/generic_receive_offload_lib.rst
> > index c2d7a41..078bec0 100644
> > --- a/doc/guides/prog_guide/generic_receive_offload_lib.rst
> > +++ b/doc/guides/prog_guide/generic_receive_offload_lib.rst
> > @@ -57,7 +57,9 @@ assumes the packets are complete (i.e., MF==0 &&
> > frag_off==0), when IP  fragmentation is possible (i.e., DF==0). Additionally, it
> > complies RFC
> >  6864 to process the IPv4 ID field.
> > 
> > -Currently, the GRO library provides GRO supports for TCP/IPv4 packets.
> > +Currently, the GRO library provides GRO supports for TCP/IPv4 packets
> > +and VxLAN packets which contain an outer IPv4 header and an inner
> > +TCP/IPv4 packet.
> > 
> >  Two Sets of API
> >  ---------------
> > @@ -108,7 +110,8 @@ Reassembly Algorithm
> > 
> >  The reassembly algorithm is used for reassembling packets. In the GRO
> > library, different GRO types can use different algorithms. In this -section, we
> > will introduce an algorithm, which is used by TCP/IPv4 GRO.
> > +section, we will introduce an algorithm, which is used by TCP/IPv4 GRO
> > +and VxLAN GRO.
> > 
> >  Challenges
> >  ~~~~~~~~~~
> > @@ -185,6 +188,30 @@ Header fields deciding if two packets are neighbors
> > include:
> >  - IPv4 ID. The IPv4 ID fields of the packets, whose DF bit is 0, should
> >    be increased by 1.
> > 
> > +VxLAN GRO
> > +---------
> > +
> > +The table structure used by VxLAN GRO, which is in charge of processing
> > +VxLAN packets with an outer IPv4 header and inner TCP/IPv4 packet, is
> > +similar with that of TCP/IPv4 GRO. Differently, the header fields used
> > +to define a VxLAN flow include:
> > +
> > +- outer source and destination: Ethernet and IP address, UDP port
> > +
> > +- VxLAN header (VNI and flag)
> > +
> > +- inner source and destination: Ethernet and IP address, TCP port
> > +
> > +Header fields deciding if packets are neighbors include:
> > +
> > +- outer IPv4 ID. The IPv4 ID fields of the packets, whose DF bit in the
> > +  outer IPv4 header is 0, should be increased by 1.
> > +
> > +- inner TCP sequence number
> > +
> > +- inner IPv4 ID. The IPv4 ID fields of the packets, whose DF bit in the
> > +  inner IPv4 header is 0, should be increased by 1.
> > +
> >  .. note::
> >          We comply RFC 6864 to process the IPv4 ID field. Specifically,
> >          we check IPv4 ID fields for the packets whose DF bit is 0 and diff
> > --git a/lib/librte_gro/Makefile b/lib/librte_gro/Makefile index
> > eb423cc..0110455 100644
> > --- a/lib/librte_gro/Makefile
> > +++ b/lib/librte_gro/Makefile
> > @@ -45,6 +45,7 @@ LIBABIVER := 1
> >  # source files
> >  SRCS-$(CONFIG_RTE_LIBRTE_GRO) += rte_gro.c
> >  SRCS-$(CONFIG_RTE_LIBRTE_GRO) += gro_tcp4.c
> > +SRCS-$(CONFIG_RTE_LIBRTE_GRO) += gro_vxlan_tcp4.c
> > 
> >  # install this header file
> >  SYMLINK-$(CONFIG_RTE_LIBRTE_GRO)-include += rte_gro.h diff --git
> > a/lib/librte_gro/gro_vxlan_tcp4.c b/lib/librte_gro/gro_vxlan_tcp4.c new file
> > mode 100644 index 0000000..6567779
> > --- /dev/null
> > +++ b/lib/librte_gro/gro_vxlan_tcp4.c
> > @@ -0,0 +1,515 @@
> > +/*-
> > + *   BSD LICENSE
> > + *
> > + *   Copyright(c) 2017 Intel Corporation. All rights reserved.
> > + *
> > + *   Redistribution and use in source and binary forms, with or without
> > + *   modification, are permitted provided that the following conditions
> > + *   are met:
> > + *
> > + *     * Redistributions of source code must retain the above copyright
> > + *       notice, this list of conditions and the following disclaimer.
> > + *     * Redistributions in binary form must reproduce the above copyright
> > + *       notice, this list of conditions and the following disclaimer in
> > + *       the documentation and/or other materials provided with the
> > + *       distribution.
> > + *     * Neither the name of Intel Corporation nor the names of its
> > + *       contributors may be used to endorse or promote products
> > derived
> > + *       from this software without specific prior written permission.
> > + *
> > + *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
> > CONTRIBUTORS
> > + *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
> > NOT
> > + *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
> > FITNESS FOR
> > + *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
> > COPYRIGHT
> > + *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
> > INCIDENTAL,
> > + *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
> > BUT NOT
> > + *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
> > LOSS OF USE,
> > + *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
> > AND ON ANY
> > + *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
> > TORT
> > + *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
> > OF THE USE
> > + *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
> > DAMAGE.
> > + */
> > +
> > +#include <rte_malloc.h>
> > +#include <rte_mbuf.h>
> > +#include <rte_cycles.h>
> > +#include <rte_ethdev.h>
> > +#include <rte_udp.h>
> > +
> > +#include "gro_vxlan_tcp4.h"
> > +
> > +void *
> > +gro_vxlan_tcp4_tbl_create(uint16_t socket_id,
> > +		uint16_t max_flow_num,
> > +		uint16_t max_item_per_flow)
> > +{
> > +	struct gro_vxlan_tcp4_tbl *tbl;
> > +	size_t size;
> > +	uint32_t entries_num, i;
> > +
> > +	entries_num = max_flow_num * max_item_per_flow;
> > +	entries_num = RTE_MIN(entries_num,
> > GRO_VXLAN_TCP4_TBL_MAX_ITEM_NUM);
> > +
> > +	if (entries_num == 0)
> > +		return NULL;
> > +
> > +	tbl = rte_zmalloc_socket(__func__,
> > +			sizeof(struct gro_vxlan_tcp4_tbl),
> > +			RTE_CACHE_LINE_SIZE,
> > +			socket_id);
> > +	if (tbl == NULL)
> > +		return NULL;
> > +
> > +	size = sizeof(struct gro_vxlan_tcp4_item) * entries_num;
> > +	tbl->items = rte_zmalloc_socket(__func__,
> > +			size,
> > +			RTE_CACHE_LINE_SIZE,
> > +			socket_id);
> > +	if (tbl->items == NULL) {
> > +		rte_free(tbl);
> > +		return NULL;
> > +	}
> > +	tbl->max_item_num = entries_num;
> > +
> > +	size = sizeof(struct gro_vxlan_tcp4_flow) * entries_num;
> > +	tbl->flows = rte_zmalloc_socket(__func__,
> > +			size,
> > +			RTE_CACHE_LINE_SIZE,
> > +			socket_id);
> > +	if (tbl->flows == NULL) {
> > +		rte_free(tbl->items);
> > +		rte_free(tbl);
> > +		return NULL;
> > +	}
> > +
> > +	for (i = 0; i < entries_num; i++)
> > +		tbl->flows[i].start_index = INVALID_ARRAY_INDEX;
> > +	tbl->max_flow_num = entries_num;
> > +
> > +	return tbl;
> > +}
> > +
> > +void
> > +gro_vxlan_tcp4_tbl_destroy(void *tbl)
> > +{
> > +	struct gro_vxlan_tcp4_tbl *vxlan_tbl = tbl;
> > +
> > +	if (vxlan_tbl) {
> > +		rte_free(vxlan_tbl->items);
> > +		rte_free(vxlan_tbl->flows);
> > +	}
> > +	rte_free(vxlan_tbl);
> 
> What if vxlan_tbl=NULL, free? This should be moved into if block and may also add NULL check for items and flows also.

Since rte_free() supports to check the NULL parameter, we don't
need to check that for vxlan_tbl/items/flows.

Thanks,
Jiayu

> 
> > +}
> > +
> > +static inline uint32_t
> > +find_an_empty_item(struct gro_vxlan_tcp4_tbl *tbl) {
> > +	uint32_t max_item_num = tbl->max_item_num, i;
> > +
> > +	for (i = 0; i < max_item_num; i++)
> > +		if (tbl->items[i].inner_item.firstseg == NULL)
> > +			return i;
> > +	return INVALID_ARRAY_INDEX;
> > +}
> > +
> > +static inline uint32_t
> > +find_an_empty_flow(struct gro_vxlan_tcp4_tbl *tbl) {
> > +	uint32_t max_flow_num = tbl->max_flow_num, i;
> > +
> > +	for (i = 0; i < max_flow_num; i++)
> > +		if (tbl->flows[i].start_index == INVALID_ARRAY_INDEX)
> > +			return i;
> > +	return INVALID_ARRAY_INDEX;
> > +}
> > +
> > +static inline uint32_t
> > +insert_new_item(struct gro_vxlan_tcp4_tbl *tbl,
> > +		struct rte_mbuf *pkt,
> > +		uint64_t start_time,
> > +		uint32_t prev_idx,
> > +		uint32_t sent_seq,
> > +		uint16_t outer_ip_id,
> > +		uint16_t ip_id,
> > +		uint8_t outer_is_atomic,
> > +		uint8_t is_atomic)
> > +{
> > +	uint32_t item_idx;
> > +
> > +	item_idx = find_an_empty_item(tbl);
> > +	if (item_idx == INVALID_ARRAY_INDEX)
> > +		return INVALID_ARRAY_INDEX;
> > +
> > +	tbl->items[item_idx].inner_item.firstseg = pkt;
> > +	tbl->items[item_idx].inner_item.lastseg = rte_pktmbuf_lastseg(pkt);
> > +	tbl->items[item_idx].inner_item.start_time = start_time;
> > +	tbl->items[item_idx].inner_item.next_pkt_idx = INVALID_ARRAY_INDEX;
> > +	tbl->items[item_idx].inner_item.sent_seq = sent_seq;
> > +	tbl->items[item_idx].inner_item.ip_id = ip_id;
> > +	tbl->items[item_idx].inner_item.nb_merged = 1;
> > +	tbl->items[item_idx].inner_item.is_atomic = is_atomic;
> > +	tbl->items[item_idx].outer_ip_id = outer_ip_id;
> > +	tbl->items[item_idx].outer_is_atomic = outer_is_atomic;
> > +	tbl->item_num++;
> > +
> > +	/* If the previous packet exists, chain the new one with it. */
> > +	if (prev_idx != INVALID_ARRAY_INDEX) {
> > +		tbl->items[item_idx].inner_item.next_pkt_idx =
> > +			tbl->items[prev_idx].inner_item.next_pkt_idx;
> > +		tbl->items[prev_idx].inner_item.next_pkt_idx = item_idx;
> > +	}
> > +
> > +	return item_idx;
> > +}
> > +
> > +static inline uint32_t
> > +delete_item(struct gro_vxlan_tcp4_tbl *tbl,
> > +		uint32_t item_idx,
> > +		uint32_t prev_item_idx)
> > +{
> > +	uint32_t next_idx = tbl->items[item_idx].inner_item.next_pkt_idx;
> > +
> > +	/* NULL indicates an empty item. */
> > +	tbl->items[item_idx].inner_item.firstseg = NULL;
> > +	tbl->item_num--;
> > +	if (prev_item_idx != INVALID_ARRAY_INDEX)
> > +		tbl->items[prev_item_idx].inner_item.next_pkt_idx = next_idx;
> > +
> > +	return next_idx;
> > +}
> > +
> > +static inline uint32_t
> > +insert_new_flow(struct gro_vxlan_tcp4_tbl *tbl,
> > +		struct vxlan_tcp4_flow_key *src,
> > +		uint32_t item_idx)
> > +{
> > +	struct vxlan_tcp4_flow_key *dst;
> > +	uint32_t flow_idx;
> > +
> > +	flow_idx = find_an_empty_flow(tbl);
> > +	if (flow_idx == INVALID_ARRAY_INDEX)
> > +		return INVALID_ARRAY_INDEX;
> > +
> > +	dst = &(tbl->flows[flow_idx].key);
> > +
> > +	ether_addr_copy(&(src->inner_key.eth_saddr),
> > +			&(dst->inner_key.eth_saddr));
> > +	ether_addr_copy(&(src->inner_key.eth_daddr),
> > +			&(dst->inner_key.eth_daddr));
> > +	dst->inner_key.ip_src_addr = src->inner_key.ip_src_addr;
> > +	dst->inner_key.ip_dst_addr = src->inner_key.ip_dst_addr;
> > +	dst->inner_key.recv_ack = src->inner_key.recv_ack;
> > +	dst->inner_key.src_port = src->inner_key.src_port;
> > +	dst->inner_key.dst_port = src->inner_key.dst_port;
> > +
> > +	dst->vxlan_hdr.vx_flags = src->vxlan_hdr.vx_flags;
> > +	dst->vxlan_hdr.vx_vni = src->vxlan_hdr.vx_vni;
> > +	ether_addr_copy(&(src->outer_eth_saddr), &(dst->outer_eth_saddr));
> > +	ether_addr_copy(&(src->outer_eth_daddr), &(dst->outer_eth_daddr));
> > +	dst->outer_ip_src_addr = src->outer_ip_src_addr;
> > +	dst->outer_ip_dst_addr = src->outer_ip_dst_addr;
> > +	dst->outer_src_port = src->outer_src_port;
> > +	dst->outer_dst_port = src->outer_dst_port;
> > +
> > +	tbl->flows[flow_idx].start_index = item_idx;
> > +	tbl->flow_num++;
> > +
> > +	return flow_idx;
> > +}
> > +
> > +static inline int
> > +is_same_vxlan_tcp4_flow(struct vxlan_tcp4_flow_key k1,
> > +		struct vxlan_tcp4_flow_key k2)
> > +{
> > +	return (is_same_ether_addr(&k1.outer_eth_saddr,
> > &k2.outer_eth_saddr) &&
> > +			is_same_ether_addr(&k1.outer_eth_daddr,
> > +				&k2.outer_eth_daddr) &&
> > +			(k1.outer_ip_src_addr == k2.outer_ip_src_addr) &&
> > +			(k1.outer_ip_dst_addr == k2.outer_ip_dst_addr) &&
> > +			(k1.outer_src_port == k2.outer_src_port) &&
> > +			(k1.outer_dst_port == k2.outer_dst_port) &&
> > +			(k1.vxlan_hdr.vx_flags == k2.vxlan_hdr.vx_flags) &&
> > +			(k1.vxlan_hdr.vx_vni == k2.vxlan_hdr.vx_vni) &&
> > +			is_same_tcp4_flow(k1.inner_key, k2.inner_key)); }
> > +
> > +static inline int
> > +check_vxlan_seq_option(struct gro_vxlan_tcp4_item *item,
> > +		struct tcp_hdr *tcp_hdr,
> > +		uint32_t sent_seq,
> > +		uint16_t outer_ip_id,
> > +		uint16_t ip_id,
> > +		uint16_t tcp_hl,
> > +		uint16_t tcp_dl,
> > +		uint8_t outer_is_atomic,
> > +		uint8_t is_atomic)
> > +{
> > +	struct rte_mbuf *pkt = item->inner_item.firstseg;
> > +	int cmp;
> > +	uint16_t l2_offset;
> > +
> > +	/* Don't merge packets whose outer DF bits are different. */
> > +	if (unlikely(item->outer_is_atomic ^ outer_is_atomic))
> > +		return 0;
> > +
> > +	l2_offset = pkt->outer_l2_len + pkt->outer_l3_len;
> > +	cmp = check_seq_option(&item->inner_item, tcp_hdr, sent_seq, ip_id,
> > +			tcp_hl, tcp_dl, l2_offset, is_atomic);
> > +	if ((cmp == 1) && (outer_is_atomic ||
> > +				(outer_ip_id == item->outer_ip_id +
> > +				 item->inner_item.nb_merged)))
> > +		/* Append the packet. */
> > +		return 1;
> > +	else if ((cmp == -1) && (outer_is_atomic ||
> > +				(outer_ip_id + 1 == item->outer_ip_id)))
> > +		/* Prepend the packet. */
> > +		return -1;
> > +
> > +	return 0;
> > +}
> > +
> > +static inline int
> > +merge_two_vxlan_tcp4_packets(struct gro_vxlan_tcp4_item *item,
> > +		struct rte_mbuf *pkt,
> > +		int cmp,
> > +		uint32_t sent_seq,
> > +		uint16_t outer_ip_id,
> > +		uint16_t ip_id)
> > +{
> > +	if (merge_two_tcp4_packets(&item->inner_item, pkt, cmp, sent_seq,
> > +				ip_id, pkt->outer_l2_len +
> > +				pkt->outer_l3_len)) {
> > +		item->outer_ip_id = cmp < 0 ? outer_ip_id : item->outer_ip_id;
> > +		return 1;
> > +	}
> > +
> > +	return 0;
> > +}
> > +
> > +static inline void
> > +update_vxlan_header(struct gro_vxlan_tcp4_item *item) {
> > +	struct ipv4_hdr *ipv4_hdr;
> > +	struct udp_hdr *udp_hdr;
> > +	struct rte_mbuf *pkt = item->inner_item.firstseg;
> > +	uint16_t len;
> > +
> > +	/* Update the outer IPv4 header. */
> > +	len = pkt->pkt_len - pkt->outer_l2_len;
> > +	ipv4_hdr = (struct ipv4_hdr *)(rte_pktmbuf_mtod(pkt, char *) +
> > +			pkt->outer_l2_len);
> > +	ipv4_hdr->total_length = rte_cpu_to_be_16(len);
> > +
> > +	/* Update the outer UDP header. */
> > +	len -= pkt->outer_l3_len;
> > +	udp_hdr = (struct udp_hdr *)((char *)ipv4_hdr + pkt->outer_l3_len);
> > +	udp_hdr->dgram_len = rte_cpu_to_be_16(len);
> > +
> > +	/* Update the inner IPv4 header. */
> > +	len -= pkt->l2_len;
> > +	ipv4_hdr = (struct ipv4_hdr *)((char *)udp_hdr + pkt->l2_len);
> > +	ipv4_hdr->total_length = rte_cpu_to_be_16(len); }
> > +
> > +int32_t
> > +gro_vxlan_tcp4_reassemble(struct rte_mbuf *pkt,
> > +		struct gro_vxlan_tcp4_tbl *tbl,
> > +		uint64_t start_time)
> > +{
> > +	struct ether_hdr *outer_eth_hdr, *eth_hdr;
> > +	struct ipv4_hdr *outer_ipv4_hdr, *ipv4_hdr;
> > +	struct tcp_hdr *tcp_hdr;
> > +	struct udp_hdr *udp_hdr;
> > +	struct vxlan_hdr *vxlan_hdr;
> > +	uint32_t sent_seq;
> > +	uint16_t tcp_dl, frag_off, outer_ip_id, ip_id;
> > +	uint8_t outer_is_atomic, is_atomic;
> > +
> > +	struct vxlan_tcp4_flow_key key;
> > +	uint32_t cur_idx, prev_idx, item_idx;
> > +	uint32_t i, max_flow_num;
> > +	int cmp;
> > +	uint16_t hdr_len;
> > +
> > +	outer_eth_hdr = rte_pktmbuf_mtod(pkt, struct ether_hdr *);
> > +	outer_ipv4_hdr = (struct ipv4_hdr *)((char *)outer_eth_hdr +
> > +			pkt->outer_l2_len);
> > +	udp_hdr = (struct udp_hdr *)((char *)outer_ipv4_hdr +
> > +			pkt->outer_l3_len);
> > +	vxlan_hdr = (struct vxlan_hdr *)((char *)udp_hdr +
> > +			sizeof(struct udp_hdr));
> > +	eth_hdr = (struct ether_hdr *)((char *)vxlan_hdr +
> > +			sizeof(struct vxlan_hdr));
> > +	ipv4_hdr = (struct ipv4_hdr *)((char *)udp_hdr + pkt->l2_len);
> > +	tcp_hdr = (struct tcp_hdr *)((char *)ipv4_hdr + pkt->l3_len);
> > +
> > +	/*
> > +	 * Don't process the packet which has FIN, SYN, RST, PSH, URG,
> > +	 * ECE or CWR set.
> > +	 */
> > +	if (tcp_hdr->tcp_flags != TCP_ACK_FLAG)
> > +		return -1;
> > +
> > +	hdr_len = pkt->outer_l2_len + pkt->outer_l3_len + pkt->l2_len +
> > +		pkt->l3_len + pkt->l4_len;
> > +	/*
> > +	 * Don't process the packet whose payload length is less than or
> > +	 * equal to 0.
> > +	 */
> > +	tcp_dl = pkt->pkt_len - hdr_len;
> > +	if (tcp_dl <= 0)
> > +		return -1;
> > +
> > +	/*
> > +	 * Save IPv4 ID for the packet whose DF bit is 0. For the packet
> > +	 * whose DF bit is 1, IPv4 ID is ignored.
> > +	 */
> > +	frag_off = rte_be_to_cpu_16(outer_ipv4_hdr->fragment_offset);
> > +	outer_is_atomic = (frag_off & IPV4_HDR_DF_FLAG) ==
> > IPV4_HDR_DF_FLAG;
> > +	outer_ip_id = outer_is_atomic ? 0 :
> > +		rte_be_to_cpu_16(outer_ipv4_hdr->packet_id);
> > +	frag_off = rte_be_to_cpu_16(ipv4_hdr->fragment_offset);
> > +	is_atomic = (frag_off & IPV4_HDR_DF_FLAG) == IPV4_HDR_DF_FLAG;
> > +	ip_id = is_atomic ? 0 : rte_be_to_cpu_16(ipv4_hdr->packet_id);
> > +
> > +	sent_seq = rte_be_to_cpu_32(tcp_hdr->sent_seq);
> > +
> > +	ether_addr_copy(&(eth_hdr->s_addr), &(key.inner_key.eth_saddr));
> > +	ether_addr_copy(&(eth_hdr->d_addr), &(key.inner_key.eth_daddr));
> > +	key.inner_key.ip_src_addr = ipv4_hdr->src_addr;
> > +	key.inner_key.ip_dst_addr = ipv4_hdr->dst_addr;
> > +	key.inner_key.recv_ack = tcp_hdr->recv_ack;
> > +	key.inner_key.src_port = tcp_hdr->src_port;
> > +	key.inner_key.dst_port = tcp_hdr->dst_port;
> > +
> > +	key.vxlan_hdr.vx_flags = vxlan_hdr->vx_flags;
> > +	key.vxlan_hdr.vx_vni = vxlan_hdr->vx_vni;
> > +	ether_addr_copy(&(outer_eth_hdr->s_addr), &(key.outer_eth_saddr));
> > +	ether_addr_copy(&(outer_eth_hdr->d_addr), &(key.outer_eth_daddr));
> > +	key.outer_ip_src_addr = outer_ipv4_hdr->src_addr;
> > +	key.outer_ip_dst_addr = outer_ipv4_hdr->dst_addr;
> > +	key.outer_src_port = udp_hdr->src_port;
> > +	key.outer_dst_port = udp_hdr->dst_port;
> > +
> > +	/* Search for a matched flow. */
> > +	max_flow_num = tbl->max_flow_num;
> > +	for (i = 0; i < max_flow_num; i++) {
> > +		if (tbl->flows[i].start_index != INVALID_ARRAY_INDEX &&
> > +				is_same_vxlan_tcp4_flow(tbl->flows[i].key,
> > +					key))
> > +			break;
> > +	}
> > +
> > +	/*
> > +	 * Can't find a matched flow. Insert a new flow and store the
> > +	 * packet into the flow.
> > +	 */
> > +	if (i == tbl->max_flow_num) {
> > +		item_idx = insert_new_item(tbl, pkt, start_time,
> > +				INVALID_ARRAY_INDEX, sent_seq, outer_ip_id,
> > +				ip_id, outer_is_atomic, is_atomic);
> > +		if (item_idx == INVALID_ARRAY_INDEX)
> > +			return -1;
> > +		if (insert_new_flow(tbl, &key, item_idx) ==
> > +				INVALID_ARRAY_INDEX) {
> > +			/*
> > +			 * Fail to insert a new flow, so
> > +			 * delete the inserted packet.
> > +			 */
> > +			delete_item(tbl, item_idx, INVALID_ARRAY_INDEX);
> > +			return -1;
> > +		}
> > +		return 0;
> > +	}
> > +
> > +	/* Check all packets in the flow and try to find a neighbor. */
> > +	cur_idx = tbl->flows[i].start_index;
> > +	prev_idx = cur_idx;
> > +	do {
> > +		cmp = check_vxlan_seq_option(&(tbl->items[cur_idx]), tcp_hdr,
> > +				sent_seq, outer_ip_id, ip_id, pkt->l4_len,
> > +				tcp_dl, outer_is_atomic, is_atomic);
> > +		if (cmp) {
> > +			if (merge_two_vxlan_tcp4_packets(&(tbl->items[cur_idx]),
> > +						pkt, cmp, sent_seq,
> > +						outer_ip_id, ip_id))
> > +				return 1;
> > +			/*
> > +			 * Can't merge two packets, as the packet
> > +			 * length will be greater than the max value.
> > +			 * Insert the packet into the flow.
> > +			 */
> > +			if (insert_new_item(tbl, pkt, start_time, prev_idx,
> > +						sent_seq, outer_ip_id,
> > +						ip_id, outer_is_atomic,
> > +						is_atomic) ==
> > +					INVALID_ARRAY_INDEX)
> > +				return -1;
> > +			return 0;
> > +		}
> > +		prev_idx = cur_idx;
> > +		cur_idx = tbl->items[cur_idx].inner_item.next_pkt_idx;
> > +	} while (cur_idx != INVALID_ARRAY_INDEX);
> > +
> > +	/* Can't find neighbor. Insert the packet into the flow. */
> > +	if (insert_new_item(tbl, pkt, start_time, prev_idx, sent_seq,
> > +				outer_ip_id, ip_id, outer_is_atomic,
> > +				is_atomic) == INVALID_ARRAY_INDEX)
> > +		return -1;
> > +
> > +	return 0;
> > +}
> > +
> > +uint16_t
> > +gro_vxlan_tcp4_tbl_timeout_flush(struct gro_vxlan_tcp4_tbl *tbl,
> > +		uint64_t flush_timestamp,
> > +		struct rte_mbuf **out,
> > +		uint16_t nb_out)
> > +{
> > +	uint16_t k = 0;
> > +	uint32_t i, j;
> > +	uint32_t max_flow_num = tbl->max_flow_num;
> > +
> > +	for (i = 0; i < max_flow_num; i++) {
> > +		if (unlikely(tbl->flow_num == 0))
> > +			return k;
> > +
> > +		j = tbl->flows[i].start_index;
> > +		while (j != INVALID_ARRAY_INDEX) {
> > +			if (tbl->items[j].inner_item.start_time <=
> > +					flush_timestamp) {
> > +				out[k++] = tbl->items[j].inner_item.firstseg;
> > +				if (tbl->items[j].inner_item.nb_merged > 1)
> > +					update_vxlan_header(&(tbl->items[j]));
> > +				/*
> > +				 * Delete the item and get the next packet
> > +				 * index.
> > +				 */
> > +				j = delete_item(tbl, j, INVALID_ARRAY_INDEX);
> > +				tbl->flows[i].start_index = j;
> > +				if (j == INVALID_ARRAY_INDEX)
> > +					tbl->flow_num--;
> > +
> > +				if (unlikely(k == nb_out))
> > +					return k;
> > +			} else
> > +				/*
> > +				 * The left packets in the flow won't be
> > +				 * timeout. Go to check other flows.
> > +				 */
> > +				break;
> > +		}
> > +	}
> > +	return k;
> > +}
> > +
> > +uint32_t
> > +gro_vxlan_tcp4_tbl_pkt_count(void *tbl) {
> > +	struct gro_vxlan_tcp4_tbl *gro_tbl = tbl;
> > +
> > +	if (gro_tbl)
> > +		return gro_tbl->item_num;
> > +
> > +	return 0;
> > +}
> > diff --git a/lib/librte_gro/gro_vxlan_tcp4.h b/lib/librte_gro/gro_vxlan_tcp4.h
> > new file mode 100644 index 0000000..66baf73
> > --- /dev/null
> > +++ b/lib/librte_gro/gro_vxlan_tcp4.h
> > @@ -0,0 +1,184 @@
> > +/*-
> > + *   BSD LICENSE
> > + *
> > + *   Copyright(c) 2017 Intel Corporation. All rights reserved.
> > + *
> > + *   Redistribution and use in source and binary forms, with or without
> > + *   modification, are permitted provided that the following conditions
> > + *   are met:
> > + *
> > + *     * Redistributions of source code must retain the above copyright
> > + *       notice, this list of conditions and the following disclaimer.
> > + *     * Redistributions in binary form must reproduce the above copyright
> > + *       notice, this list of conditions and the following disclaimer in
> > + *       the documentation and/or other materials provided with the
> > + *       distribution.
> > + *     * Neither the name of Intel Corporation nor the names of its
> > + *       contributors may be used to endorse or promote products
> > derived
> > + *       from this software without specific prior written permission.
> > + *
> > + *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
> > CONTRIBUTORS
> > + *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
> > NOT
> > + *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
> > FITNESS FOR
> > + *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
> > COPYRIGHT
> > + *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
> > INCIDENTAL,
> > + *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
> > BUT NOT
> > + *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
> > LOSS OF USE,
> > + *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
> > AND ON ANY
> > + *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
> > TORT
> > + *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
> > OF THE USE
> > + *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
> > DAMAGE.
> > + */
> > +
> > +#ifndef _GRO_VXLAN_TCP4_H_
> > +#define _GRO_VXLAN_TCP4_H_
> > +
> > +#include "gro_tcp4.h"
> > +
> > +#define GRO_VXLAN_TCP4_TBL_MAX_ITEM_NUM (1024UL * 1024UL)
> > +
> > +/* Header fields representing a VxLAN flow */ struct
> > +vxlan_tcp4_flow_key {
> > +	struct tcp4_flow_key inner_key;
> > +	struct vxlan_hdr vxlan_hdr;
> > +
> > +	struct ether_addr outer_eth_saddr;
> > +	struct ether_addr outer_eth_daddr;
> > +
> > +	uint32_t outer_ip_src_addr;
> > +	uint32_t outer_ip_dst_addr;
> > +
> > +	/* Outer UDP ports */
> > +	uint16_t outer_src_port;
> > +	uint16_t outer_dst_port;
> > +
> > +};
> > +
> > +struct gro_vxlan_tcp4_flow {
> > +	struct vxlan_tcp4_flow_key key;
> > +	/*
> > +	 * The index of the first packet in the flow. INVALID_ARRAY_INDEX
> > +	 * indicates an empty flow.
> > +	 */
> > +	uint32_t start_index;
> > +};
> > +
> > +struct gro_vxlan_tcp4_item {
> > +	struct gro_tcp4_item inner_item;
> > +	/* IPv4 ID in the outer IPv4 header */
> > +	uint16_t outer_ip_id;
> > +	/* Indicate if outer IPv4 ID can be ignored */
> > +	uint8_t outer_is_atomic;
> > +};
> > +
> > +/*
> > + * VxLAN (with an outer IPv4 header and an inner TCP/IPv4 packet)
> > + * reassembly table structure
> > + */
> > +struct gro_vxlan_tcp4_tbl {
> > +	/* item array */
> > +	struct gro_vxlan_tcp4_item *items;
> > +	/* flow array */
> > +	struct gro_vxlan_tcp4_flow *flows;
> > +	/* current item number */
> > +	uint32_t item_num;
> > +	/* current flow number */
> > +	uint32_t flow_num;
> > +	/* the maximum item number */
> > +	uint32_t max_item_num;
> > +	/* the maximum flow number */
> > +	uint32_t max_flow_num;
> > +};
> > +
> > +/**
> > + * This function creates a VxLAN reassembly table for VxLAN packets
> > + * which have an outer IPv4 header and an inner TCP/IPv4 packet.
> > + *
> > + * @param socket_id
> > + *  Socket index for allocating the table
> > + * @param max_flow_num
> > + *  The maximum number of flows in the table
> > + * @param max_item_per_flow
> > + *  The maximum number of packets per flow
> > + *
> > + * @return
> > + *  - Return the table pointer on success.
> > + *  - Return NULL on failure.
> > + */
> > +void *gro_vxlan_tcp4_tbl_create(uint16_t socket_id,
> > +		uint16_t max_flow_num,
> > +		uint16_t max_item_per_flow);
> > +
> > +/**
> > + * This function destroys a VxLAN reassembly table.
> > + *
> > + * @param tbl
> > + *  Pointer pointing to the VxLAN reassembly table  */ void
> > +gro_vxlan_tcp4_tbl_destroy(void *tbl);
> > +
> > +/**
> > + * This function merges a VxLAN packet which has an outer IPv4 header
> > +and
> > + * an inner TCP/IPv4 packet. It doesn't process the packet, whose TCP
> > + * header has SYN, FIN, RST, PSH, CWR, ECE or URG bit set, or which
> > + * doesn't have payload.
> > + *
> > + * This function doesn't check if the packet has correct checksums and
> > + * doesn't re-calculate checksums for the merged packet. Additionally,
> > + * it assumes the packets are complete (i.e., MF==0 && frag_off==0),
> > +when
> > + * IP fragmentation is possible (i.e., DF==0). It returns the packet,
> > +if
> > + * the packet has invalid parameters (e.g. SYN bit is set) or there is
> > +no
> > + * available space in the table.
> > + *
> > + * @param pkt
> > + *  Packet to reassemble
> > + * @param tbl
> > + *  Pointer pointing to the VxLAN reassembly table
> > + * @start_time
> > + *  The time when the packet is inserted into the table
> > + *
> > + * @return
> > + *  - Return a positive value if the packet is merged.
> > + *  - Return zero if the packet isn't merged but stored in the table.
> > + *  - Return a negative value for invalid parameters or no available
> > + *    space in the table.
> > + */
> > +int32_t gro_vxlan_tcp4_reassemble(struct rte_mbuf *pkt,
> > +		struct gro_vxlan_tcp4_tbl *tbl,
> > +		uint64_t start_time);
> > +
> > +/**
> > + * This function flushes timeout packets in the VxLAN reassembly table,
> > + * and without updating checksums.
> > + *
> > + * @param tbl
> > + *  Pointer pointing to a VxLAN GRO table
> > + * @param flush_timestamp
> > + *  This function flushes packets which are inserted into the table
> > + *  before or at the flush_timestamp.
> > + * @param out
> > + *  Pointer array used to keep flushed packets
> > + * @param nb_out
> > + *  The element number in 'out'. It also determines the maximum number
> > +of
> > + *  packets that can be flushed finally.
> > + *
> > + * @return
> > + *  The number of flushed packets
> > + */
> > +uint16_t gro_vxlan_tcp4_tbl_timeout_flush(struct gro_vxlan_tcp4_tbl *tbl,
> > +		uint64_t flush_timestamp,
> > +		struct rte_mbuf **out,
> > +		uint16_t nb_out);
> > +
> > +/**
> > + * This function returns the number of the packets in a VxLAN
> > + * reassembly table.
> > + *
> > + * @param tbl
> > + *  Pointer pointing to the VxLAN reassembly table
> > + *
> > + * @return
> > + *  The number of packets in the table
> > + */
> > +uint32_t gro_vxlan_tcp4_tbl_pkt_count(void *tbl); #endif
> > diff --git a/lib/librte_gro/rte_gro.c b/lib/librte_gro/rte_gro.c index
> > b3931a8..5a26893 100644
> > --- a/lib/librte_gro/rte_gro.c
> > +++ b/lib/librte_gro/rte_gro.c
> > @@ -37,6 +37,7 @@
> > 
> >  #include "rte_gro.h"
> >  #include "gro_tcp4.h"
> > +#include "gro_vxlan_tcp4.h"
> > 
> >  typedef void *(*gro_tbl_create_fn)(uint16_t socket_id,
> >  		uint16_t max_flow_num,
> > @@ -45,15 +46,28 @@ typedef void (*gro_tbl_destroy_fn)(void *tbl);
> > typedef uint32_t (*gro_tbl_pkt_count_fn)(void *tbl);
> > 
> >  static gro_tbl_create_fn tbl_create_fn[RTE_GRO_TYPE_MAX_NUM] = {
> > -		gro_tcp4_tbl_create, NULL};
> > +		gro_tcp4_tbl_create, gro_vxlan_tcp4_tbl_create, NULL};
> >  static gro_tbl_destroy_fn tbl_destroy_fn[RTE_GRO_TYPE_MAX_NUM] = {
> > -			gro_tcp4_tbl_destroy, NULL};
> > +			gro_tcp4_tbl_destroy, gro_vxlan_tcp4_tbl_destroy,
> > +			NULL};
> >  static gro_tbl_pkt_count_fn tbl_pkt_count_fn[RTE_GRO_TYPE_MAX_NUM]
> > = {
> > -			gro_tcp4_tbl_pkt_count, NULL};
> > +			gro_tcp4_tbl_pkt_count, gro_vxlan_tcp4_tbl_pkt_count,
> > +			NULL};
> > 
> >  #define IS_IPV4_TCP_PKT(ptype) (RTE_ETH_IS_IPV4_HDR(ptype) && \
> >  		((ptype & RTE_PTYPE_L4_TCP) == RTE_PTYPE_L4_TCP))
> > 
> > +#define IS_IPV4_VXLAN_TCP4_PKT(ptype) (RTE_ETH_IS_IPV4_HDR(ptype)
> > && \
> > +		((ptype & RTE_PTYPE_L4_UDP) == RTE_PTYPE_L4_UDP) && \
> > +		((ptype & RTE_PTYPE_TUNNEL_VXLAN) == \
> > +		 RTE_PTYPE_TUNNEL_VXLAN) && \
> > +		 ((ptype & RTE_PTYPE_INNER_L4_TCP) == \
> > +		  RTE_PTYPE_INNER_L4_TCP) && \
> > +		  (((ptype & RTE_PTYPE_INNER_L3_MASK) & \
> > +		    (RTE_PTYPE_INNER_L3_IPV4 | \
> > +		     RTE_PTYPE_INNER_L3_IPV4_EXT | \
> > +		     RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN)) != 0))
> > +
> >  /*
> >   * GRO context structure. It keeps the table structures, which are
> >   * used to merge packets, for different GRO types. Before using @@ -137,12
> > +151,20 @@ rte_gro_reassemble_burst(struct rte_mbuf **pkts,
> >  	struct gro_tcp4_flow tcp_flows[RTE_GRO_MAX_BURST_ITEM_NUM];
> >  	struct gro_tcp4_item tcp_items[RTE_GRO_MAX_BURST_ITEM_NUM] =
> > {{0} };
> > 
> > +	/* Allocate a reassembly table for VXLAN GRO */
> > +	struct gro_vxlan_tcp4_tbl vxlan_tbl;
> > +	struct gro_vxlan_tcp4_flow
> > vxlan_flows[RTE_GRO_MAX_BURST_ITEM_NUM];
> > +	struct gro_vxlan_tcp4_item
> > vxlan_items[RTE_GRO_MAX_BURST_ITEM_NUM] = {
> > +		{{0}, 0, 0} };
> > +
> >  	struct rte_mbuf *unprocess_pkts[nb_pkts];
> >  	uint32_t item_num;
> >  	int32_t ret;
> >  	uint16_t i, unprocess_num = 0, nb_after_gro = nb_pkts;
> > +	uint8_t do_tcp4_gro = 0, do_vxlan_gro = 0;
> > 
> > -	if (unlikely((param->gro_types & RTE_GRO_TCP_IPV4) == 0))
> > +	if (unlikely((param->gro_types & (RTE_GRO_IPV4_VXLAN_TCP_IPV4 |
> > +					RTE_GRO_TCP_IPV4)) == 0))
> >  		return nb_pkts;
> > 
> >  	/* Get the maximum number of packets */ @@ -150,22 +172,47 @@
> > rte_gro_reassemble_burst(struct rte_mbuf **pkts,
> >  				param->max_item_per_flow));
> >  	item_num = RTE_MIN(item_num, RTE_GRO_MAX_BURST_ITEM_NUM);
> > 
> > -	for (i = 0; i < item_num; i++)
> > -		tcp_flows[i].start_index = INVALID_ARRAY_INDEX;
> > +	if (param->gro_types & RTE_GRO_IPV4_VXLAN_TCP_IPV4) {
> > +		for (i = 0; i < item_num; i++)
> > +			vxlan_flows[i].start_index = INVALID_ARRAY_INDEX;
> > +
> > +		vxlan_tbl.flows = vxlan_flows;
> > +		vxlan_tbl.items = vxlan_items;
> > +		vxlan_tbl.flow_num = 0;
> > +		vxlan_tbl.item_num = 0;
> > +		vxlan_tbl.max_flow_num = item_num;
> > +		vxlan_tbl.max_item_num = item_num;
> > +		do_vxlan_gro = 1;
> > +	}
> > 
> > -	tcp_tbl.flows = tcp_flows;
> > -	tcp_tbl.items = tcp_items;
> > -	tcp_tbl.flow_num = 0;
> > -	tcp_tbl.item_num = 0;
> > -	tcp_tbl.max_flow_num = item_num;
> > -	tcp_tbl.max_item_num = item_num;
> > +	if (param->gro_types & RTE_GRO_TCP_IPV4) {
> > +		for (i = 0; i < item_num; i++)
> > +			tcp_flows[i].start_index = INVALID_ARRAY_INDEX;
> > +
> > +		tcp_tbl.flows = tcp_flows;
> > +		tcp_tbl.items = tcp_items;
> > +		tcp_tbl.flow_num = 0;
> > +		tcp_tbl.item_num = 0;
> > +		tcp_tbl.max_flow_num = item_num;
> > +		tcp_tbl.max_item_num = item_num;
> > +		do_tcp4_gro = 1;
> > +	}
> > 
> >  	for (i = 0; i < nb_pkts; i++) {
> > -		if (IS_IPV4_TCP_PKT(pkts[i]->packet_type)) {
> > -			/*
> > -			 * The timestamp is ignored, since all packets
> > -			 * will be flushed from the tables.
> > -			 */
> > +		/*
> > +		 * The timestamp is ignored, since all packets
> > +		 * will be flushed from the tables.
> > +		 */
> > +		if (IS_IPV4_VXLAN_TCP4_PKT(pkts[i]->packet_type) &&
> > +				do_vxlan_gro) {
> > +			ret = gro_vxlan_tcp4_reassemble(pkts[i], &vxlan_tbl, 0);
> > +			if (ret > 0)
> > +				/* Merge successfully */
> > +				nb_after_gro--;
> > +			else if (ret < 0)
> > +				unprocess_pkts[unprocess_num++] = pkts[i];
> > +		} else if (IS_IPV4_TCP_PKT(pkts[i]->packet_type) &&
> > +				do_tcp4_gro) {
> >  			ret = gro_tcp4_reassemble(pkts[i], &tcp_tbl, 0);
> >  			if (ret > 0)
> >  				/* Merge successfully */
> > @@ -177,8 +224,16 @@ rte_gro_reassemble_burst(struct rte_mbuf **pkts,
> >  	}
> > 
> >  	if (nb_after_gro < nb_pkts) {
> > +		i = 0;
> >  		/* Flush all packets from the tables */
> > -		i = gro_tcp4_tbl_timeout_flush(&tcp_tbl, 0, pkts, nb_pkts);
> > +		if (do_vxlan_gro) {
> > +			i = gro_vxlan_tcp4_tbl_timeout_flush(&vxlan_tbl,
> > +					0, pkts, nb_pkts);
> > +		}
> > +		if (do_tcp4_gro) {
> > +			i += gro_tcp4_tbl_timeout_flush(&tcp_tbl, 0,
> > +					&pkts[i], nb_pkts - i);
> > +		}
> >  		/* Copy unprocessed packets */
> >  		if (unprocess_num > 0) {
> >  			memcpy(&pkts[i], unprocess_pkts,
> > @@ -197,18 +252,33 @@ rte_gro_reassemble(struct rte_mbuf **pkts,  {
> >  	struct rte_mbuf *unprocess_pkts[nb_pkts];
> >  	struct gro_ctx *gro_ctx = ctx;
> > -	void *tcp_tbl;
> > +	void *tcp_tbl, *vxlan_tbl;
> >  	uint64_t current_time;
> >  	uint16_t i, unprocess_num = 0;
> > +	uint8_t do_tcp4_gro, do_vxlan_gro;
> > 
> > -	if (unlikely((gro_ctx->gro_types & RTE_GRO_TCP_IPV4) == 0))
> > +	if (unlikely((gro_ctx->gro_types & (RTE_GRO_IPV4_VXLAN_TCP_IPV4 |
> > +					RTE_GRO_TCP_IPV4)) == 0))
> >  		return nb_pkts;
> > 
> >  	tcp_tbl = gro_ctx->tbls[RTE_GRO_TCP_IPV4_INDEX];
> > +	vxlan_tbl = gro_ctx->tbls[RTE_GRO_IPV4_VXLAN_TCP_IPV4_INDEX];
> > +
> > +	do_tcp4_gro = (gro_ctx->gro_types & RTE_GRO_TCP_IPV4) ==
> > +		RTE_GRO_TCP_IPV4;
> > +	do_vxlan_gro = (gro_ctx->gro_types & RTE_GRO_IPV4_VXLAN_TCP_IPV4)
> > ==
> > +		RTE_GRO_IPV4_VXLAN_TCP_IPV4;
> > +
> >  	current_time = rte_rdtsc();
> > 
> >  	for (i = 0; i < nb_pkts; i++) {
> > -		if (IS_IPV4_TCP_PKT(pkts[i]->packet_type)) {
> > +		if (IS_IPV4_VXLAN_TCP4_PKT(pkts[i]->packet_type) &&
> > +				do_vxlan_gro) {
> > +			if (gro_vxlan_tcp4_reassemble(pkts[i], vxlan_tbl,
> > +						current_time) < 0)
> > +				unprocess_pkts[unprocess_num++] = pkts[i];
> > +		} else if (IS_IPV4_TCP_PKT(pkts[i]->packet_type) &&
> > +				do_tcp4_gro) {
> >  			if (gro_tcp4_reassemble(pkts[i], tcp_tbl,
> >  						current_time) < 0)
> >  				unprocess_pkts[unprocess_num++] = pkts[i]; @@ -232,18
> > +302,27 @@ rte_gro_timeout_flush(void *ctx,  {
> >  	struct gro_ctx *gro_ctx = ctx;
> >  	uint64_t flush_timestamp;
> > +	uint16_t num = 0;
> > 
> >  	gro_types = gro_types & gro_ctx->gro_types;
> >  	flush_timestamp = rte_rdtsc() - timeout_cycles;
> > 
> > -	if (gro_types & RTE_GRO_TCP_IPV4) {
> > -		return gro_tcp4_tbl_timeout_flush(
> > +	if (gro_types & RTE_GRO_IPV4_VXLAN_TCP_IPV4) {
> > +		num = gro_vxlan_tcp4_tbl_timeout_flush(gro_ctx->tbls[
> > +				RTE_GRO_IPV4_VXLAN_TCP_IPV4_INDEX],
> > +				flush_timestamp, out, max_nb_out);
> > +		max_nb_out -= num;
> > +	}
> > +
> > +	/* If no available space in 'out', stop flushing. */
> > +	if ((gro_types & RTE_GRO_TCP_IPV4) && max_nb_out > 0) {
> > +		num += gro_tcp4_tbl_timeout_flush(
> >  				gro_ctx->tbls[RTE_GRO_TCP_IPV4_INDEX],
> >  				flush_timestamp,
> > -				out, max_nb_out);
> > +				&out[num], max_nb_out);
> >  	}
> > 
> > -	return 0;
> > +	return num;
> >  }
> > 
> >  uint64_t
> > diff --git a/lib/librte_gro/rte_gro.h b/lib/librte_gro/rte_gro.h index
> > 36a1e60..5ed72d7 100644
> > --- a/lib/librte_gro/rte_gro.h
> > +++ b/lib/librte_gro/rte_gro.h
> > @@ -51,12 +51,15 @@ extern "C" {
> >   */
> >  #define RTE_GRO_TYPE_MAX_NUM 64
> >  /**< the max number of supported GRO types */ -#define
> > RTE_GRO_TYPE_SUPPORT_NUM 1
> > +#define RTE_GRO_TYPE_SUPPORT_NUM 2
> >  /**< the number of currently supported GRO types */
> > 
> >  #define RTE_GRO_TCP_IPV4_INDEX 0
> >  #define RTE_GRO_TCP_IPV4 (1ULL << RTE_GRO_TCP_IPV4_INDEX)  /**<
> > TCP/IPv4 GRO flag */
> > +#define RTE_GRO_IPV4_VXLAN_TCP_IPV4_INDEX 1 #define
> > +RTE_GRO_IPV4_VXLAN_TCP_IPV4 (1ULL <<
> > RTE_GRO_IPV4_VXLAN_TCP_IPV4_INDEX)
> > +/**< VxLAN GRO flag. */
> > 
> >  /**
> >   * Structure used to create GRO context objects or used to pass
> > --
> > 2.7.4


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