From: yang_y_yi@163.com To: dev@dpdk.org Cc: jiayu.hu@intel.com, konstantin.ananyev@intel.com, thomas@monjalon.net, yangyi01@inspur.com, yang_y_yi@163.com Subject: [dpdk-dev] [PATCH v2] gso: add VXLAN UDP GSO support Date: Tue, 10 Nov 2020 10:21:30 +0800 Message-ID: <20201110022130.179352-1-yang_y_yi@163.com> (raw) In-Reply-To: <20200701064643.216084-1-yang_y_yi@163.com> From: Yi Yang <yangyi01@inspur.com> Many NICs can't offload VXLAN UFO, so it is very important to do VXLAN UDP GSO by software to improve VM-to-VM UDP performance, especially for the case that VM MTU is just 1500 but not 9000. With this enabled in DPDK, OVS DPDK can leverage it to improve VM-to-VM UDP performance, performance gain is very huge, over 2 times. Signed-off-by: Yi Yang <yangyi01@inspur.com> --- Changelog: v1 -> v2: - Remove condition check for outer udp header because it is always true for VXLAN. - Remove inner udp header update because it is wrong and unnecessary. --- .../generic_segmentation_offload_lib.rst | 14 ++-- doc/guides/rel_notes/release_20_11.rst | 4 + lib/librte_gso/gso_common.h | 5 ++ lib/librte_gso/gso_tunnel_udp4.c | 97 ++++++++++++++++++++++ lib/librte_gso/gso_tunnel_udp4.h | 44 ++++++++++ lib/librte_gso/meson.build | 2 +- lib/librte_gso/rte_gso.c | 8 ++ 7 files changed, 166 insertions(+), 8 deletions(-) create mode 100644 lib/librte_gso/gso_tunnel_udp4.c create mode 100644 lib/librte_gso/gso_tunnel_udp4.h diff --git a/doc/guides/prog_guide/generic_segmentation_offload_lib.rst b/doc/guides/prog_guide/generic_segmentation_offload_lib.rst index ad91c6e..c1d06e1 100644 --- a/doc/guides/prog_guide/generic_segmentation_offload_lib.rst +++ b/doc/guides/prog_guide/generic_segmentation_offload_lib.rst @@ -46,7 +46,7 @@ Limitations - TCP - UDP - VxLAN - - GRE + - GRE TCP See `Supported GSO Packet Types`_ for further details. @@ -157,14 +157,14 @@ does not modify it during segmentation. Therefore, after UDP GSO, only the first output packet has the original UDP header, and others just have l2 and l3 headers. -VxLAN GSO -~~~~~~~~~ +VxLAN IPv4 GSO +~~~~~~~~~~~~~~ VxLAN packets GSO supports segmentation of suitably large VxLAN packets, -which contain an outer IPv4 header, inner TCP/IPv4 headers, and optional -inner and/or outer VLAN tag(s). +which contain an outer IPv4 header, inner TCP/IPv4 or UDP/IPv4 headers, and +optional inner and/or outer VLAN tag(s). -GRE GSO -~~~~~~~ +GRE TCP/IPv4 GSO +~~~~~~~~~~~~~~~~ GRE GSO supports segmentation of suitably large GRE packets, which contain an outer IPv4 header, inner TCP/IPv4 headers, and an optional VLAN tag. diff --git a/doc/guides/rel_notes/release_20_11.rst b/doc/guides/rel_notes/release_20_11.rst index 6bbd6ee..bb01738 100644 --- a/doc/guides/rel_notes/release_20_11.rst +++ b/doc/guides/rel_notes/release_20_11.rst @@ -420,6 +420,10 @@ New Features leverage IOAT DMA channel with vhost asynchronous APIs. See the :doc:`../sample_app_ug/vhost` for more details. +* **Added VxLAN UDP/IPv4 GSO support.** + + Added inner UDP/IPv4 support for VxLAN IPv4 GSO. + Removed Items ------------- diff --git a/lib/librte_gso/gso_common.h b/lib/librte_gso/gso_common.h index a0b8343..4d5f303 100644 --- a/lib/librte_gso/gso_common.h +++ b/lib/librte_gso/gso_common.h @@ -26,6 +26,11 @@ (PKT_TX_TCP_SEG | PKT_TX_IPV4 | PKT_TX_OUTER_IPV4 | \ PKT_TX_TUNNEL_VXLAN)) +#define IS_IPV4_VXLAN_UDP4(flag) (((flag) & (PKT_TX_UDP_SEG | PKT_TX_IPV4 | \ + PKT_TX_OUTER_IPV4 | PKT_TX_TUNNEL_MASK)) == \ + (PKT_TX_UDP_SEG | PKT_TX_IPV4 | PKT_TX_OUTER_IPV4 | \ + PKT_TX_TUNNEL_VXLAN)) + #define IS_IPV4_GRE_TCP4(flag) (((flag) & (PKT_TX_TCP_SEG | PKT_TX_IPV4 | \ PKT_TX_OUTER_IPV4 | PKT_TX_TUNNEL_MASK)) == \ (PKT_TX_TCP_SEG | PKT_TX_IPV4 | PKT_TX_OUTER_IPV4 | \ diff --git a/lib/librte_gso/gso_tunnel_udp4.c b/lib/librte_gso/gso_tunnel_udp4.c new file mode 100644 index 0000000..1fc7a8d --- /dev/null +++ b/lib/librte_gso/gso_tunnel_udp4.c @@ -0,0 +1,97 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2020 Inspur Corporation + */ + +#include "gso_common.h" +#include "gso_tunnel_udp4.h" + +#define IPV4_HDR_MF_BIT (1U << 13) + +static void +update_tunnel_ipv4_udp_headers(struct rte_mbuf *pkt, struct rte_mbuf **segs, + uint16_t nb_segs) +{ + struct rte_ipv4_hdr *ipv4_hdr; + uint16_t outer_id, inner_id, tail_idx, i, length; + uint16_t outer_ipv4_offset, inner_ipv4_offset; + uint16_t outer_udp_offset; + uint16_t frag_offset = 0, is_mf; + + outer_ipv4_offset = pkt->outer_l2_len; + outer_udp_offset = outer_ipv4_offset + pkt->outer_l3_len; + inner_ipv4_offset = outer_udp_offset + pkt->l2_len; + + /* Outer IPv4 header. */ + ipv4_hdr = (struct rte_ipv4_hdr *)(rte_pktmbuf_mtod(pkt, char *) + + outer_ipv4_offset); + outer_id = rte_be_to_cpu_16(ipv4_hdr->packet_id); + + /* Inner IPv4 header. */ + ipv4_hdr = (struct rte_ipv4_hdr *)(rte_pktmbuf_mtod(pkt, char *) + + inner_ipv4_offset); + inner_id = rte_be_to_cpu_16(ipv4_hdr->packet_id); + + tail_idx = nb_segs - 1; + + for (i = 0; i < nb_segs; i++) { + update_ipv4_header(segs[i], outer_ipv4_offset, outer_id); + update_udp_header(segs[i], outer_udp_offset); + update_ipv4_header(segs[i], inner_ipv4_offset, inner_id); + /* For the case inner packet is UDP, we must keep UDP + * datagram boundary, it must be handled as IP fragment. + * + * Set IP fragment offset for inner IP header. + */ + ipv4_hdr = (struct rte_ipv4_hdr *) + (rte_pktmbuf_mtod(segs[i], char *) + + inner_ipv4_offset); + is_mf = i < tail_idx ? IPV4_HDR_MF_BIT : 0; + ipv4_hdr->fragment_offset = + rte_cpu_to_be_16(frag_offset | is_mf); + length = segs[i]->pkt_len - inner_ipv4_offset - pkt->l3_len; + frag_offset += (length >> 3); + outer_id++; + } +} + +int +gso_tunnel_udp4_segment(struct rte_mbuf *pkt, + uint16_t gso_size, + struct rte_mempool *direct_pool, + struct rte_mempool *indirect_pool, + struct rte_mbuf **pkts_out, + uint16_t nb_pkts_out) +{ + struct rte_ipv4_hdr *inner_ipv4_hdr; + uint16_t pyld_unit_size, hdr_offset, frag_off; + int ret; + + hdr_offset = pkt->outer_l2_len + pkt->outer_l3_len + pkt->l2_len; + inner_ipv4_hdr = (struct rte_ipv4_hdr *)(rte_pktmbuf_mtod(pkt, char *) + + hdr_offset); + /* + * Don't process the packet whose MF bit or offset in the inner + * IPv4 header are non-zero. + */ + frag_off = rte_be_to_cpu_16(inner_ipv4_hdr->fragment_offset); + if (unlikely(IS_FRAGMENTED(frag_off))) + return 0; + + hdr_offset += pkt->l3_len; + /* Don't process the packet without data */ + if ((hdr_offset + pkt->l4_len) >= pkt->pkt_len) + return 0; + + /* pyld_unit_size must be a multiple of 8 because frag_off + * uses 8 bytes as unit. + */ + pyld_unit_size = (gso_size - hdr_offset) & ~7U; + + /* Segment the payload */ + ret = gso_do_segment(pkt, hdr_offset, pyld_unit_size, direct_pool, + indirect_pool, pkts_out, nb_pkts_out); + if (ret > 1) + update_tunnel_ipv4_udp_headers(pkt, pkts_out, ret); + + return ret; +} diff --git a/lib/librte_gso/gso_tunnel_udp4.h b/lib/librte_gso/gso_tunnel_udp4.h new file mode 100644 index 0000000..c49b43f --- /dev/null +++ b/lib/librte_gso/gso_tunnel_udp4.h @@ -0,0 +1,44 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2020 Inspur Corporation + */ + +#ifndef _GSO_TUNNEL_UDP4_H_ +#define _GSO_TUNNEL_UDP4_H_ + +#include <stdint.h> +#include <rte_mbuf.h> + +/** + * Segment a tunneling packet with inner UDP/IPv4 headers. This function + * does not check if the input packet has correct checksums, and does not + * update checksums for output GSO segments. Furthermore, it does not + * process IP fragment packets. + * + * @param pkt + * The packet mbuf to segment. + * @param gso_size + * The max length of a GSO segment, measured in bytes. + * @param direct_pool + * MBUF pool used for allocating direct buffers for output segments. + * @param indirect_pool + * MBUF pool used for allocating indirect buffers for output segments. + * @param pkts_out + * Pointer array used to store the MBUF addresses of output GSO + * segments, when it succeeds. If the memory space in pkts_out is + * insufficient, it fails and returns -EINVAL. + * @param nb_pkts_out + * The max number of items that 'pkts_out' can keep. + * + * @return + * - The number of GSO segments filled in pkts_out on success. + * - Return 0 if it needn't GSO. + * - Return -ENOMEM if run out of memory in MBUF pools. + * - Return -EINVAL for invalid parameters. + */ +int gso_tunnel_udp4_segment(struct rte_mbuf *pkt, + uint16_t gso_size, + struct rte_mempool *direct_pool, + struct rte_mempool *indirect_pool, + struct rte_mbuf **pkts_out, + uint16_t nb_pkts_out); +#endif diff --git a/lib/librte_gso/meson.build b/lib/librte_gso/meson.build index ad8dd85..05904f2 100644 --- a/lib/librte_gso/meson.build +++ b/lib/librte_gso/meson.build @@ -2,6 +2,6 @@ # Copyright(c) 2017 Intel Corporation sources = files('gso_common.c', 'gso_tcp4.c', 'gso_udp4.c', - 'gso_tunnel_tcp4.c', 'rte_gso.c') + 'gso_tunnel_tcp4.c', 'gso_tunnel_udp4.c', 'rte_gso.c') headers = files('rte_gso.h') deps += ['ethdev'] diff --git a/lib/librte_gso/rte_gso.c b/lib/librte_gso/rte_gso.c index 896350e..fb76a21 100644 --- a/lib/librte_gso/rte_gso.c +++ b/lib/librte_gso/rte_gso.c @@ -11,6 +11,7 @@ #include "gso_common.h" #include "gso_tcp4.h" #include "gso_tunnel_tcp4.h" +#include "gso_tunnel_udp4.h" #include "gso_udp4.h" #define ILLEGAL_UDP_GSO_CTX(ctx) \ @@ -60,6 +61,13 @@ ret = gso_tunnel_tcp4_segment(pkt, gso_size, ipid_delta, direct_pool, indirect_pool, pkts_out, nb_pkts_out); + } else if (IS_IPV4_VXLAN_UDP4(pkt->ol_flags) && + (gso_ctx->gso_types & (DEV_TX_OFFLOAD_VXLAN_TNL_TSO | + DEV_TX_OFFLOAD_UDP_TSO))) { + pkt->ol_flags &= (~PKT_TX_UDP_SEG); + ret = gso_tunnel_udp4_segment(pkt, gso_size, + direct_pool, indirect_pool, + pkts_out, nb_pkts_out); } else if (IS_IPV4_TCP(pkt->ol_flags) && (gso_ctx->gso_types & DEV_TX_OFFLOAD_TCP_TSO)) { pkt->ol_flags &= (~PKT_TX_TCP_SEG); -- 1.8.3.1
next prev parent reply other threads:[~2020-11-10 2:21 UTC|newest] Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-07-01 6:46 [dpdk-dev] [PATCH] " yang_y_yi 2020-09-27 5:57 ` yang_y_yi 2020-10-29 6:47 ` [dpdk-dev] [PATCH v1] " yang_y_yi 2020-11-06 4:09 ` Jiayu Hu 2020-11-09 1:03 ` yang_y_yi 2020-11-10 2:21 ` yang_y_yi [this message] 2020-11-13 13:16 ` [dpdk-dev] [PATCH v2] " Ananyev, Konstantin 2020-11-16 0:50 ` yang_y_yi 2020-11-16 1:11 ` [dpdk-dev] [PATCH v3] " yang_y_yi 2020-11-19 5:37 ` Hu, Jiayu 2020-11-19 6:43 ` [dpdk-dev] [PATCH v4] gso: add VXLAN UDP/IPv4 support yang_y_yi 2020-11-19 6:49 ` Hu, Jiayu 2021-01-15 3:51 ` yang_y_yi 2021-01-15 10:24 ` Thomas Monjalon 2021-01-18 0:05 ` yang_y_yi
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