f41b5156fe
Add 'rte_' prefix to structures: - rename struct tcp_hdr as struct rte_tcp_hdr. Signed-off-by: Olivier Matz <olivier.matz@6wind.com> Reviewed-by: Stephen Hemminger <stephen@networkplumber.org> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com> Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>
146 lines
4.7 KiB
C
146 lines
4.7 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2017 Intel Corporation
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*/
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#ifndef _GSO_COMMON_H_
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#define _GSO_COMMON_H_
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#include <stdint.h>
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#include <rte_mbuf.h>
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#include <rte_ip.h>
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#include <rte_tcp.h>
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#include <rte_udp.h>
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#define IS_FRAGMENTED(frag_off) (((frag_off) & RTE_IPV4_HDR_OFFSET_MASK) != 0 \
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|| ((frag_off) & RTE_IPV4_HDR_MF_FLAG) == RTE_IPV4_HDR_MF_FLAG)
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#define TCP_HDR_PSH_MASK ((uint8_t)0x08)
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#define TCP_HDR_FIN_MASK ((uint8_t)0x01)
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#define IS_IPV4_TCP(flag) (((flag) & (PKT_TX_TCP_SEG | PKT_TX_IPV4)) == \
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(PKT_TX_TCP_SEG | PKT_TX_IPV4))
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#define IS_IPV4_VXLAN_TCP4(flag) (((flag) & (PKT_TX_TCP_SEG | PKT_TX_IPV4 | \
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PKT_TX_OUTER_IPV4 | PKT_TX_TUNNEL_MASK)) == \
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(PKT_TX_TCP_SEG | PKT_TX_IPV4 | PKT_TX_OUTER_IPV4 | \
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PKT_TX_TUNNEL_VXLAN))
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#define IS_IPV4_GRE_TCP4(flag) (((flag) & (PKT_TX_TCP_SEG | PKT_TX_IPV4 | \
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PKT_TX_OUTER_IPV4 | PKT_TX_TUNNEL_MASK)) == \
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(PKT_TX_TCP_SEG | PKT_TX_IPV4 | PKT_TX_OUTER_IPV4 | \
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PKT_TX_TUNNEL_GRE))
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#define IS_IPV4_UDP(flag) (((flag) & (PKT_TX_UDP_SEG | PKT_TX_IPV4)) == \
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(PKT_TX_UDP_SEG | PKT_TX_IPV4))
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/**
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* Internal function which updates the UDP header of a packet, following
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* segmentation. This is required to update the header's datagram length field.
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*
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* @param pkt
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* The packet containing the UDP header.
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* @param udp_offset
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* The offset of the UDP header from the start of the packet.
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*/
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static inline void
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update_udp_header(struct rte_mbuf *pkt, uint16_t udp_offset)
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{
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struct udp_hdr *udp_hdr;
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udp_hdr = (struct udp_hdr *)(rte_pktmbuf_mtod(pkt, char *) +
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udp_offset);
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udp_hdr->dgram_len = rte_cpu_to_be_16(pkt->pkt_len - udp_offset);
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}
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/**
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* Internal function which updates the TCP header of a packet, following
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* segmentation. This is required to update the header's 'sent' sequence
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* number, and also to clear 'PSH' and 'FIN' flags for non-tail segments.
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*
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* @param pkt
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* The packet containing the TCP header.
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* @param l4_offset
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* The offset of the TCP header from the start of the packet.
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* @param sent_seq
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* The sent sequence number.
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* @param non-tail
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* Indicates whether or not this is a tail segment.
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*/
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static inline void
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update_tcp_header(struct rte_mbuf *pkt, uint16_t l4_offset, uint32_t sent_seq,
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uint8_t non_tail)
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{
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struct rte_tcp_hdr *tcp_hdr;
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tcp_hdr = (struct rte_tcp_hdr *)(rte_pktmbuf_mtod(pkt, char *) +
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l4_offset);
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tcp_hdr->sent_seq = rte_cpu_to_be_32(sent_seq);
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if (likely(non_tail))
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tcp_hdr->tcp_flags &= (~(TCP_HDR_PSH_MASK |
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TCP_HDR_FIN_MASK));
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}
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/**
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* Internal function which updates the IPv4 header of a packet, following
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* segmentation. This is required to update the header's 'total_length' field,
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* to reflect the reduced length of the now-segmented packet. Furthermore, the
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* header's 'packet_id' field must be updated to reflect the new ID of the
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* now-segmented packet.
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*
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* @param pkt
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* The packet containing the IPv4 header.
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* @param l3_offset
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* The offset of the IPv4 header from the start of the packet.
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* @param id
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* The new ID of the packet.
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*/
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static inline void
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update_ipv4_header(struct rte_mbuf *pkt, uint16_t l3_offset, uint16_t id)
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{
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struct rte_ipv4_hdr *ipv4_hdr;
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ipv4_hdr = (struct rte_ipv4_hdr *)(rte_pktmbuf_mtod(pkt, char *) +
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l3_offset);
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ipv4_hdr->total_length = rte_cpu_to_be_16(pkt->pkt_len - l3_offset);
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ipv4_hdr->packet_id = rte_cpu_to_be_16(id);
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}
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/**
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* Internal function which divides the input packet into small segments.
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* Each of the newly-created segments is organized as a two-segment MBUF,
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* where the first segment is a standard mbuf, which stores a copy of
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* packet header, and the second is an indirect mbuf which points to a
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* section of data in the input packet.
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*
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* @param pkt
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* Packet to segment.
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* @param pkt_hdr_offset
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* Packet header offset, measured in bytes.
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* @param pyld_unit_size
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* The max payload length of a GSO segment.
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* @param direct_pool
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* MBUF pool used for allocating direct buffers for output segments.
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* @param indirect_pool
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* MBUF pool used for allocating indirect buffers for output segments.
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* @param pkts_out
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* Pointer array used to keep the mbuf addresses of output segments. If
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* the memory space in pkts_out is insufficient, gso_do_segment() fails
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* and returns -EINVAL.
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* @param nb_pkts_out
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* The max number of items that pkts_out can keep.
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*
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* @return
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* - The number of segments created in the event of success.
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* - Return -ENOMEM if run out of memory in MBUF pools.
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* - Return -EINVAL for invalid parameters.
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*/
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int gso_do_segment(struct rte_mbuf *pkt,
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uint16_t pkt_hdr_offset,
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uint16_t pyld_unit_size,
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struct rte_mempool *direct_pool,
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struct rte_mempool *indirect_pool,
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struct rte_mbuf **pkts_out,
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uint16_t nb_pkts_out);
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#endif
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