X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_net%2Frte_net.h;h=1560ecfa462f90aa03e14d207cf5347266b2d88b;hb=921bd50fa29639735936729277ac8a10688aa115;hp=d4156aeadfc3392dc7452f461a87283e163a9b78;hpb=873dd1e68d7cfd2f0e5140b8af4f5e0b6007d4db;p=dpdk.git diff --git a/lib/librte_net/rte_net.h b/lib/librte_net/rte_net.h index d4156aeadf..1560ecfa46 100644 --- a/lib/librte_net/rte_net.h +++ b/lib/librte_net/rte_net.h @@ -1,34 +1,5 @@ -/*- - * BSD LICENSE - * - * Copyright 2016 6WIND S.A. - * 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. +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright 2016 6WIND S.A. */ #ifndef _RTE_NET_PTYPE_H_ @@ -38,6 +9,11 @@ extern "C" { #endif +#include +#include +#include +#include + /** * Structure containing header lengths associated to a packet, filled * by rte_net_get_ptype(). @@ -52,6 +28,34 @@ struct rte_net_hdr_lens { uint8_t inner_l4_len; }; +/** + * Skip IPv6 header extensions. + * + * This function skips all IPv6 extensions, returning size of + * complete header including options and final protocol value. + * + * @warning + * @b EXPERIMENTAL: this API may change without prior notice + * + * @param proto + * Protocol field of IPv6 header. + * @param m + * The packet mbuf to be parsed. + * @param off + * On input, must contain the offset to the first byte following + * IPv6 header, on output, contains offset to the first byte + * of next layer (after any IPv6 extension header) + * @param frag + * Contains 1 in output if packet is an IPv6 fragment. + * @return + * Protocol that follows IPv6 header. + * -1 if an error occurs during mbuf parsing. + */ +__rte_experimental +int +rte_net_skip_ip6_ext(uint16_t proto, const struct rte_mbuf *m, uint32_t *off, + int *frag); + /** * Parse an Ethernet packet to get its packet type. * @@ -86,6 +90,131 @@ struct rte_net_hdr_lens { uint32_t rte_net_get_ptype(const struct rte_mbuf *m, struct rte_net_hdr_lens *hdr_lens, uint32_t layers); +/** + * Prepare pseudo header checksum + * + * This function prepares pseudo header checksum for TSO and non-TSO tcp/udp in + * provided mbufs packet data and based on the requested offload flags. + * + * - for non-TSO tcp/udp packets full pseudo-header checksum is counted and set + * in packet data, + * - for TSO the IP payload length is not included in pseudo header. + * + * This function expects that used headers are in the first data segment of + * mbuf, are not fragmented and can be safely modified. + * + * @param m + * The packet mbuf to be fixed. + * @param ol_flags + * TX offloads flags to use with this packet. + * @return + * 0 if checksum is initialized properly + */ +static inline int +rte_net_intel_cksum_flags_prepare(struct rte_mbuf *m, uint64_t ol_flags) +{ + /* Initialise ipv4_hdr to avoid false positive compiler warnings. */ + struct rte_ipv4_hdr *ipv4_hdr = NULL; + struct rte_ipv6_hdr *ipv6_hdr; + struct rte_tcp_hdr *tcp_hdr; + struct rte_udp_hdr *udp_hdr; + uint64_t inner_l3_offset = m->l2_len; + +#ifdef RTE_LIBRTE_ETHDEV_DEBUG + /* + * Does packet set any of available offloads? + * Mainly it is required to avoid fragmented headers check if + * no offloads are requested. + */ + if (!(ol_flags & PKT_TX_OFFLOAD_MASK)) + return 0; +#endif + + if (ol_flags & (PKT_TX_OUTER_IPV4 | PKT_TX_OUTER_IPV6)) + inner_l3_offset += m->outer_l2_len + m->outer_l3_len; + +#ifdef RTE_LIBRTE_ETHDEV_DEBUG + /* + * Check if headers are fragmented. + * The check could be less strict depending on which offloads are + * requested and headers to be used, but let's keep it simple. + */ + if (unlikely(rte_pktmbuf_data_len(m) < + inner_l3_offset + m->l3_len + m->l4_len)) + return -ENOTSUP; +#endif + + if (ol_flags & PKT_TX_IPV4) { + ipv4_hdr = rte_pktmbuf_mtod_offset(m, struct rte_ipv4_hdr *, + inner_l3_offset); + + if (ol_flags & PKT_TX_IP_CKSUM) + ipv4_hdr->hdr_checksum = 0; + } + + if ((ol_flags & PKT_TX_L4_MASK) == PKT_TX_UDP_CKSUM) { + if (ol_flags & PKT_TX_IPV4) { + udp_hdr = (struct rte_udp_hdr *)((char *)ipv4_hdr + + m->l3_len); + udp_hdr->dgram_cksum = rte_ipv4_phdr_cksum(ipv4_hdr, + ol_flags); + } else { + ipv6_hdr = rte_pktmbuf_mtod_offset(m, + struct rte_ipv6_hdr *, inner_l3_offset); + /* non-TSO udp */ + udp_hdr = rte_pktmbuf_mtod_offset(m, + struct rte_udp_hdr *, + inner_l3_offset + m->l3_len); + udp_hdr->dgram_cksum = rte_ipv6_phdr_cksum(ipv6_hdr, + ol_flags); + } + } else if ((ol_flags & PKT_TX_L4_MASK) == PKT_TX_TCP_CKSUM || + (ol_flags & PKT_TX_TCP_SEG)) { + if (ol_flags & PKT_TX_IPV4) { + /* non-TSO tcp or TSO */ + tcp_hdr = (struct rte_tcp_hdr *)((char *)ipv4_hdr + + m->l3_len); + tcp_hdr->cksum = rte_ipv4_phdr_cksum(ipv4_hdr, + ol_flags); + } else { + ipv6_hdr = rte_pktmbuf_mtod_offset(m, + struct rte_ipv6_hdr *, inner_l3_offset); + /* non-TSO tcp or TSO */ + tcp_hdr = rte_pktmbuf_mtod_offset(m, + struct rte_tcp_hdr *, + inner_l3_offset + m->l3_len); + tcp_hdr->cksum = rte_ipv6_phdr_cksum(ipv6_hdr, + ol_flags); + } + } + + return 0; +} + +/** + * Prepare pseudo header checksum + * + * This function prepares pseudo header checksum for TSO and non-TSO tcp/udp in + * provided mbufs packet data. + * + * - for non-TSO tcp/udp packets full pseudo-header checksum is counted and set + * in packet data, + * - for TSO the IP payload length is not included in pseudo header. + * + * This function expects that used headers are in the first data segment of + * mbuf, are not fragmented and can be safely modified. + * + * @param m + * The packet mbuf to be fixed. + * @return + * 0 if checksum is initialized properly + */ +static inline int +rte_net_intel_cksum_prepare(struct rte_mbuf *m) +{ + return rte_net_intel_cksum_flags_prepare(m, m->ol_flags); +} + #ifdef __cplusplus } #endif