mirror of
https://github.com/openvswitch/ovs
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b80f58cde2
For packets which don't already have a hash calculated, miniflow_hash_5tuple() calculates the hash of a packet using the previously built miniflow. This commit adds IPv6 profile specific hashing which uses fixed offsets into the packet to improve hashing performance. Signed-off-by: Kumar Amber <kumar.amber@intel.com> Acked-by: Harry van Haaren <harry.van.haaren@intel.com> Signed-off-by: Ian Stokes <ian.stokes@intel.com>
1168 lines
35 KiB
C
1168 lines
35 KiB
C
/*
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* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef DPBUF_H
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#define DPBUF_H 1
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#include <stddef.h>
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#include <stdint.h>
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#ifdef DPDK_NETDEV
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#include <rte_config.h>
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#include <rte_mbuf.h>
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#endif
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#include "netdev-afxdp.h"
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#include "netdev-dpdk.h"
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#include "openvswitch/list.h"
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#include "packets.h"
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#include "util.h"
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#include "flow.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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enum OVS_PACKED_ENUM dp_packet_source {
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DPBUF_MALLOC, /* Obtained via malloc(). */
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DPBUF_STACK, /* Un-movable stack space or static buffer. */
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DPBUF_STUB, /* Starts on stack, may expand into heap. */
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DPBUF_DPDK, /* buffer data is from DPDK allocated memory.
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* ref to dp_packet_init_dpdk() in dp-packet.c.
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*/
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DPBUF_AFXDP, /* Buffer data from XDP frame. */
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};
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#define DP_PACKET_CONTEXT_SIZE 64
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#ifdef DPDK_NETDEV
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#define DEF_OL_FLAG(NAME, DPDK_DEF, GENERIC_DEF) NAME = DPDK_DEF
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#else
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#define DEF_OL_FLAG(NAME, DPDK_DEF, GENERIC_DEF) NAME = GENERIC_DEF
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#endif
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/* Bit masks for the 'ol_flags' member of the 'dp_packet' structure. */
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enum dp_packet_offload_mask {
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/* Value 0 is not used. */
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/* Is the 'rss_hash' valid? */
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DEF_OL_FLAG(DP_PACKET_OL_RSS_HASH, RTE_MBUF_F_RX_RSS_HASH, 0x1),
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/* Is the 'flow_mark' valid? */
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DEF_OL_FLAG(DP_PACKET_OL_FLOW_MARK, RTE_MBUF_F_RX_FDIR_ID, 0x2),
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/* Bad L4 checksum in the packet. */
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DEF_OL_FLAG(DP_PACKET_OL_RX_L4_CKSUM_BAD, RTE_MBUF_F_RX_L4_CKSUM_BAD, 0x4),
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/* Bad IP checksum in the packet. */
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DEF_OL_FLAG(DP_PACKET_OL_RX_IP_CKSUM_BAD, RTE_MBUF_F_RX_IP_CKSUM_BAD, 0x8),
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/* Valid L4 checksum in the packet. */
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DEF_OL_FLAG(DP_PACKET_OL_RX_L4_CKSUM_GOOD, RTE_MBUF_F_RX_L4_CKSUM_GOOD,
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0x10),
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/* Valid IP checksum in the packet. */
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DEF_OL_FLAG(DP_PACKET_OL_RX_IP_CKSUM_GOOD, RTE_MBUF_F_RX_IP_CKSUM_GOOD,
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0x20),
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/* TCP Segmentation Offload. */
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DEF_OL_FLAG(DP_PACKET_OL_TX_TCP_SEG, RTE_MBUF_F_TX_TCP_SEG, 0x40),
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/* Offloaded packet is IPv4. */
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DEF_OL_FLAG(DP_PACKET_OL_TX_IPV4, RTE_MBUF_F_TX_IPV4, 0x80),
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/* Offloaded packet is IPv6. */
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DEF_OL_FLAG(DP_PACKET_OL_TX_IPV6, RTE_MBUF_F_TX_IPV6, 0x100),
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/* Offload TCP checksum. */
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DEF_OL_FLAG(DP_PACKET_OL_TX_TCP_CKSUM, RTE_MBUF_F_TX_TCP_CKSUM, 0x200),
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/* Offload UDP checksum. */
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DEF_OL_FLAG(DP_PACKET_OL_TX_UDP_CKSUM, RTE_MBUF_F_TX_UDP_CKSUM, 0x400),
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/* Offload SCTP checksum. */
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DEF_OL_FLAG(DP_PACKET_OL_TX_SCTP_CKSUM, RTE_MBUF_F_TX_SCTP_CKSUM, 0x800),
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/* Adding new field requires adding to DP_PACKET_OL_SUPPORTED_MASK. */
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};
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#define DP_PACKET_OL_SUPPORTED_MASK (DP_PACKET_OL_RSS_HASH | \
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DP_PACKET_OL_FLOW_MARK | \
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DP_PACKET_OL_RX_L4_CKSUM_BAD | \
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DP_PACKET_OL_RX_IP_CKSUM_BAD | \
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DP_PACKET_OL_RX_L4_CKSUM_GOOD | \
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DP_PACKET_OL_RX_IP_CKSUM_GOOD | \
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DP_PACKET_OL_TX_TCP_SEG | \
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DP_PACKET_OL_TX_IPV4 | \
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DP_PACKET_OL_TX_IPV6 | \
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DP_PACKET_OL_TX_TCP_CKSUM | \
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DP_PACKET_OL_TX_UDP_CKSUM | \
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DP_PACKET_OL_TX_SCTP_CKSUM)
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#define DP_PACKET_OL_TX_L4_MASK (DP_PACKET_OL_TX_TCP_CKSUM | \
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DP_PACKET_OL_TX_UDP_CKSUM | \
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DP_PACKET_OL_TX_SCTP_CKSUM)
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#define DP_PACKET_OL_RX_IP_CKSUM_MASK (DP_PACKET_OL_RX_IP_CKSUM_GOOD | \
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DP_PACKET_OL_RX_IP_CKSUM_BAD)
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#define DP_PACKET_OL_RX_L4_CKSUM_MASK (DP_PACKET_OL_RX_L4_CKSUM_GOOD | \
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DP_PACKET_OL_RX_L4_CKSUM_BAD)
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/* Buffer for holding packet data. A dp_packet is automatically reallocated
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* as necessary if it grows too large for the available memory.
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* By default the packet type is set to Ethernet (PT_ETH).
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*/
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struct dp_packet {
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#ifdef DPDK_NETDEV
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struct rte_mbuf mbuf; /* DPDK mbuf */
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#else
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void *base_; /* First byte of allocated space. */
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uint16_t allocated_; /* Number of bytes allocated. */
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uint16_t data_ofs; /* First byte actually in use. */
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uint32_t size_; /* Number of bytes in use. */
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uint32_t ol_flags; /* Offloading flags. */
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uint32_t rss_hash; /* Packet hash. */
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uint32_t flow_mark; /* Packet flow mark. */
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#endif
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enum dp_packet_source source; /* Source of memory allocated as 'base'. */
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/* All the following elements of this struct are copied in a single call
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* of memcpy in dp_packet_clone_with_headroom. */
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uint16_t l2_pad_size; /* Detected l2 padding size.
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* Padding is non-pullable. */
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uint16_t l2_5_ofs; /* MPLS label stack offset, or UINT16_MAX */
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uint16_t l3_ofs; /* Network-level header offset,
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* or UINT16_MAX. */
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uint16_t l4_ofs; /* Transport-level header offset,
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or UINT16_MAX. */
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uint32_t cutlen; /* length in bytes to cut from the end. */
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ovs_be32 packet_type; /* Packet type as defined in OpenFlow */
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union {
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struct pkt_metadata md;
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uint64_t data[DP_PACKET_CONTEXT_SIZE / 8];
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};
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};
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#if HAVE_AF_XDP
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struct dp_packet_afxdp {
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struct umem_pool *mpool;
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struct dp_packet packet;
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};
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#endif
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static inline void *dp_packet_data(const struct dp_packet *);
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static inline void dp_packet_set_data(struct dp_packet *, void *);
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static inline void *dp_packet_base(const struct dp_packet *);
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static inline void dp_packet_set_base(struct dp_packet *, void *);
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static inline uint32_t dp_packet_size(const struct dp_packet *);
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static inline void dp_packet_set_size(struct dp_packet *, uint32_t);
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static inline uint16_t dp_packet_get_allocated(const struct dp_packet *);
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static inline void dp_packet_set_allocated(struct dp_packet *, uint16_t);
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void *dp_packet_resize_l2(struct dp_packet *, int increment);
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void *dp_packet_resize_l2_5(struct dp_packet *, int increment);
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static inline void *dp_packet_eth(const struct dp_packet *);
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static inline void dp_packet_reset_offsets(struct dp_packet *);
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static inline uint16_t dp_packet_l2_pad_size(const struct dp_packet *);
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static inline void dp_packet_set_l2_pad_size(struct dp_packet *, uint16_t);
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static inline void *dp_packet_l2_5(const struct dp_packet *);
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static inline void dp_packet_set_l2_5(struct dp_packet *, void *);
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static inline void *dp_packet_l3(const struct dp_packet *);
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static inline void dp_packet_set_l3(struct dp_packet *, void *);
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static inline void *dp_packet_l4(const struct dp_packet *);
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static inline void dp_packet_set_l4(struct dp_packet *, void *);
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static inline size_t dp_packet_l4_size(const struct dp_packet *);
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static inline const void *dp_packet_get_tcp_payload(const struct dp_packet *);
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static inline const void *dp_packet_get_udp_payload(const struct dp_packet *);
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static inline const void *dp_packet_get_sctp_payload(const struct dp_packet *);
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static inline const void *dp_packet_get_icmp_payload(const struct dp_packet *);
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static inline const void *dp_packet_get_nd_payload(const struct dp_packet *);
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void dp_packet_use(struct dp_packet *, void *, size_t);
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void dp_packet_use_stub(struct dp_packet *, void *, size_t);
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void dp_packet_use_const(struct dp_packet *, const void *, size_t);
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#if HAVE_AF_XDP
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void dp_packet_use_afxdp(struct dp_packet *, void *, size_t, size_t);
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#endif
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void dp_packet_init_dpdk(struct dp_packet *);
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void dp_packet_init(struct dp_packet *, size_t);
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void dp_packet_uninit(struct dp_packet *);
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struct dp_packet *dp_packet_new(size_t);
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struct dp_packet *dp_packet_new_with_headroom(size_t, size_t headroom);
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struct dp_packet *dp_packet_clone(const struct dp_packet *);
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struct dp_packet *dp_packet_clone_with_headroom(const struct dp_packet *,
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size_t headroom);
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struct dp_packet *dp_packet_clone_data(const void *, size_t);
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struct dp_packet *dp_packet_clone_data_with_headroom(const void *, size_t,
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size_t headroom);
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void dp_packet_resize(struct dp_packet *b, size_t new_headroom,
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size_t new_tailroom);
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static inline void dp_packet_delete(struct dp_packet *);
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static inline void dp_packet_swap(struct dp_packet *, struct dp_packet *);
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static inline void *dp_packet_at(const struct dp_packet *, size_t offset,
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size_t size);
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static inline void *dp_packet_at_assert(const struct dp_packet *,
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size_t offset, size_t size);
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static inline void *dp_packet_tail(const struct dp_packet *);
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static inline void *dp_packet_end(const struct dp_packet *);
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void *dp_packet_put_uninit(struct dp_packet *, size_t);
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void *dp_packet_put_zeros(struct dp_packet *, size_t);
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void *dp_packet_put(struct dp_packet *, const void *, size_t);
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char *dp_packet_put_hex(struct dp_packet *, const char *s, size_t *n);
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void dp_packet_reserve(struct dp_packet *, size_t);
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void dp_packet_reserve_with_tailroom(struct dp_packet *, size_t headroom,
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size_t tailroom);
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void *dp_packet_push_uninit(struct dp_packet *, size_t);
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void *dp_packet_push_zeros(struct dp_packet *, size_t);
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void *dp_packet_push(struct dp_packet *, const void *, size_t);
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static inline size_t dp_packet_headroom(const struct dp_packet *);
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static inline size_t dp_packet_tailroom(const struct dp_packet *);
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void dp_packet_prealloc_headroom(struct dp_packet *, size_t);
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void dp_packet_prealloc_tailroom(struct dp_packet *, size_t);
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void dp_packet_shift(struct dp_packet *, int);
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static inline void dp_packet_clear(struct dp_packet *);
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static inline void *dp_packet_pull(struct dp_packet *, size_t);
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static inline void *dp_packet_try_pull(struct dp_packet *, size_t);
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void *dp_packet_steal_data(struct dp_packet *);
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static inline bool dp_packet_equal(const struct dp_packet *,
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const struct dp_packet *);
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/* Frees memory that 'b' points to, as well as 'b' itself. */
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static inline void
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dp_packet_delete(struct dp_packet *b)
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{
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if (b) {
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if (b->source == DPBUF_DPDK) {
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/* If this dp_packet was allocated by DPDK it must have been
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* created as a dp_packet */
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free_dpdk_buf((struct dp_packet*) b);
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return;
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}
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if (b->source == DPBUF_AFXDP) {
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free_afxdp_buf(b);
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return;
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}
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dp_packet_uninit(b);
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free(b);
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}
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}
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/* Swaps content of two packets. */
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static inline void
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dp_packet_swap(struct dp_packet *a, struct dp_packet *b)
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{
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ovs_assert(a->source == DPBUF_MALLOC || a->source == DPBUF_STUB);
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ovs_assert(b->source == DPBUF_MALLOC || b->source == DPBUF_STUB);
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struct dp_packet c = *a;
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*a = *b;
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*b = c;
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}
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/* If 'b' contains at least 'offset + size' bytes of data, returns a pointer to
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* byte 'offset'. Otherwise, returns a null pointer. */
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static inline void *
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dp_packet_at(const struct dp_packet *b, size_t offset, size_t size)
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{
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return offset + size <= dp_packet_size(b)
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? (char *) dp_packet_data(b) + offset
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: NULL;
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}
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/* Returns a pointer to byte 'offset' in 'b', which must contain at least
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* 'offset + size' bytes of data. */
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static inline void *
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dp_packet_at_assert(const struct dp_packet *b, size_t offset, size_t size)
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{
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ovs_assert(offset + size <= dp_packet_size(b));
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return ((char *) dp_packet_data(b)) + offset;
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}
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/* Returns a pointer to byte following the last byte of data in use in 'b'. */
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static inline void *
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dp_packet_tail(const struct dp_packet *b)
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{
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return (char *) dp_packet_data(b) + dp_packet_size(b);
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}
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/* Returns a pointer to byte following the last byte allocated for use (but
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* not necessarily in use) in 'b'. */
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static inline void *
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dp_packet_end(const struct dp_packet *b)
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{
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return (char *) dp_packet_base(b) + dp_packet_get_allocated(b);
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}
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/* Returns the number of bytes of headroom in 'b', that is, the number of bytes
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* of unused space in dp_packet 'b' before the data that is in use. (Most
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* commonly, the data in a dp_packet is at its beginning, and thus the
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* dp_packet's headroom is 0.) */
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static inline size_t
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dp_packet_headroom(const struct dp_packet *b)
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{
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return (char *) dp_packet_data(b) - (char *) dp_packet_base(b);
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}
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/* Returns the number of bytes that may be appended to the tail end of
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* dp_packet 'b' before the dp_packet must be reallocated. */
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static inline size_t
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dp_packet_tailroom(const struct dp_packet *b)
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{
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return (char *) dp_packet_end(b) - (char *) dp_packet_tail(b);
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}
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/* Clears any data from 'b'. */
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static inline void
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dp_packet_clear(struct dp_packet *b)
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{
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dp_packet_set_data(b, dp_packet_base(b));
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dp_packet_set_size(b, 0);
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}
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/* Removes 'size' bytes from the head end of 'b', which must contain at least
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* 'size' bytes of data. Returns the first byte of data removed. */
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static inline void *
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dp_packet_pull(struct dp_packet *b, size_t size)
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{
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void *data = dp_packet_data(b);
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ovs_assert(dp_packet_size(b) - dp_packet_l2_pad_size(b) >= size);
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dp_packet_set_data(b, (char *) dp_packet_data(b) + size);
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dp_packet_set_size(b, dp_packet_size(b) - size);
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return data;
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}
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/* If 'b' has at least 'size' bytes of data, removes that many bytes from the
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* head end of 'b' and returns the first byte removed. Otherwise, returns a
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* null pointer without modifying 'b'. */
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static inline void *
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dp_packet_try_pull(struct dp_packet *b, size_t size)
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{
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return dp_packet_size(b) - dp_packet_l2_pad_size(b) >= size
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? dp_packet_pull(b, size) : NULL;
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}
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static inline bool
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dp_packet_equal(const struct dp_packet *a, const struct dp_packet *b)
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{
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return dp_packet_size(a) == dp_packet_size(b) &&
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!memcmp(dp_packet_data(a), dp_packet_data(b), dp_packet_size(a));
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}
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static inline bool
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dp_packet_is_eth(const struct dp_packet *b)
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{
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return b->packet_type == htonl(PT_ETH);
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}
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/* Get the start of the Ethernet frame. 'l3_ofs' marks the end of the l2
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* headers, so return NULL if it is not set. */
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static inline void *
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dp_packet_eth(const struct dp_packet *b)
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{
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return (dp_packet_is_eth(b) && b->l3_ofs != UINT16_MAX)
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? dp_packet_data(b) : NULL;
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}
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/* Resets all layer offsets. 'l3' offset must be set before 'l2' can be
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* retrieved. */
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static inline void
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dp_packet_reset_offsets(struct dp_packet *b)
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{
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b->l2_pad_size = 0;
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b->l2_5_ofs = UINT16_MAX;
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b->l3_ofs = UINT16_MAX;
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b->l4_ofs = UINT16_MAX;
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}
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static inline uint16_t
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dp_packet_l2_pad_size(const struct dp_packet *b)
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{
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return b->l2_pad_size;
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}
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static inline void
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dp_packet_set_l2_pad_size(struct dp_packet *b, uint16_t pad_size)
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{
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ovs_assert(pad_size <= dp_packet_size(b));
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b->l2_pad_size = pad_size;
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}
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static inline void *
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dp_packet_l2_5(const struct dp_packet *b)
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{
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return b->l2_5_ofs != UINT16_MAX
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? (char *) dp_packet_data(b) + b->l2_5_ofs
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: NULL;
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}
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static inline void
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dp_packet_set_l2_5(struct dp_packet *b, void *l2_5)
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||
{
|
||
b->l2_5_ofs = l2_5
|
||
? (char *) l2_5 - (char *) dp_packet_data(b)
|
||
: UINT16_MAX;
|
||
}
|
||
|
||
static inline void *
|
||
dp_packet_l3(const struct dp_packet *b)
|
||
{
|
||
return b->l3_ofs != UINT16_MAX
|
||
? (char *) dp_packet_data(b) + b->l3_ofs
|
||
: NULL;
|
||
}
|
||
|
||
static inline void
|
||
dp_packet_set_l3(struct dp_packet *b, void *l3)
|
||
{
|
||
b->l3_ofs = l3 ? (char *) l3 - (char *) dp_packet_data(b) : UINT16_MAX;
|
||
}
|
||
|
||
static inline void *
|
||
dp_packet_l4(const struct dp_packet *b)
|
||
{
|
||
return b->l4_ofs != UINT16_MAX
|
||
? (char *) dp_packet_data(b) + b->l4_ofs
|
||
: NULL;
|
||
}
|
||
|
||
static inline void
|
||
dp_packet_set_l4(struct dp_packet *b, void *l4)
|
||
{
|
||
b->l4_ofs = l4 ? (char *) l4 - (char *) dp_packet_data(b) : UINT16_MAX;
|
||
}
|
||
|
||
/* Returns the size of the packet from the beginning of the L3 header to the
|
||
* end of the L3 payload. Hence L2 padding is not included. */
|
||
static inline size_t
|
||
dp_packet_l3_size(const struct dp_packet *b)
|
||
{
|
||
return OVS_LIKELY(b->l3_ofs != UINT16_MAX)
|
||
? (const char *)dp_packet_tail(b) - (const char *)dp_packet_l3(b)
|
||
- dp_packet_l2_pad_size(b)
|
||
: 0;
|
||
}
|
||
|
||
/* Returns the size of the packet from the beginning of the L4 header to the
|
||
* end of the L4 payload. Hence L2 padding is not included. */
|
||
static inline size_t
|
||
dp_packet_l4_size(const struct dp_packet *b)
|
||
{
|
||
return OVS_LIKELY(b->l4_ofs != UINT16_MAX)
|
||
? (const char *)dp_packet_tail(b) - (const char *)dp_packet_l4(b)
|
||
- dp_packet_l2_pad_size(b)
|
||
: 0;
|
||
}
|
||
|
||
static inline const void *
|
||
dp_packet_get_tcp_payload(const struct dp_packet *b)
|
||
{
|
||
size_t l4_size = dp_packet_l4_size(b);
|
||
|
||
if (OVS_LIKELY(l4_size >= TCP_HEADER_LEN)) {
|
||
struct tcp_header *tcp = dp_packet_l4(b);
|
||
int tcp_len = TCP_OFFSET(tcp->tcp_ctl) * 4;
|
||
|
||
if (OVS_LIKELY(tcp_len >= TCP_HEADER_LEN && tcp_len <= l4_size)) {
|
||
return (const char *)tcp + tcp_len;
|
||
}
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
static inline uint32_t
|
||
dp_packet_get_tcp_payload_length(const struct dp_packet *pkt)
|
||
{
|
||
const char *tcp_payload = dp_packet_get_tcp_payload(pkt);
|
||
if (tcp_payload) {
|
||
return ((char *) dp_packet_tail(pkt) - dp_packet_l2_pad_size(pkt)
|
||
- tcp_payload);
|
||
} else {
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
static inline const void *
|
||
dp_packet_get_udp_payload(const struct dp_packet *b)
|
||
{
|
||
return OVS_LIKELY(dp_packet_l4_size(b) >= UDP_HEADER_LEN)
|
||
? (const char *)dp_packet_l4(b) + UDP_HEADER_LEN : NULL;
|
||
}
|
||
|
||
static inline const void *
|
||
dp_packet_get_sctp_payload(const struct dp_packet *b)
|
||
{
|
||
return OVS_LIKELY(dp_packet_l4_size(b) >= SCTP_HEADER_LEN)
|
||
? (const char *)dp_packet_l4(b) + SCTP_HEADER_LEN : NULL;
|
||
}
|
||
|
||
static inline const void *
|
||
dp_packet_get_icmp_payload(const struct dp_packet *b)
|
||
{
|
||
return OVS_LIKELY(dp_packet_l4_size(b) >= ICMP_HEADER_LEN)
|
||
? (const char *)dp_packet_l4(b) + ICMP_HEADER_LEN : NULL;
|
||
}
|
||
|
||
static inline const void *
|
||
dp_packet_get_nd_payload(const struct dp_packet *b)
|
||
{
|
||
return OVS_LIKELY(dp_packet_l4_size(b) >= ND_MSG_LEN)
|
||
? (const char *)dp_packet_l4(b) + ND_MSG_LEN : NULL;
|
||
}
|
||
|
||
#ifdef DPDK_NETDEV
|
||
static inline uint64_t *
|
||
dp_packet_ol_flags_ptr(const struct dp_packet *b)
|
||
{
|
||
return CONST_CAST(uint64_t *, &b->mbuf.ol_flags);
|
||
}
|
||
|
||
static inline uint32_t *
|
||
dp_packet_rss_ptr(const struct dp_packet *b)
|
||
{
|
||
return CONST_CAST(uint32_t *, &b->mbuf.hash.rss);
|
||
}
|
||
|
||
static inline uint32_t *
|
||
dp_packet_flow_mark_ptr(const struct dp_packet *b)
|
||
{
|
||
return CONST_CAST(uint32_t *, &b->mbuf.hash.fdir.hi);
|
||
}
|
||
|
||
#else
|
||
static inline uint32_t *
|
||
dp_packet_ol_flags_ptr(const struct dp_packet *b)
|
||
{
|
||
return CONST_CAST(uint32_t *, &b->ol_flags);
|
||
}
|
||
|
||
static inline uint32_t *
|
||
dp_packet_rss_ptr(const struct dp_packet *b)
|
||
{
|
||
return CONST_CAST(uint32_t *, &b->rss_hash);
|
||
}
|
||
|
||
static inline uint32_t *
|
||
dp_packet_flow_mark_ptr(const struct dp_packet *b)
|
||
{
|
||
return CONST_CAST(uint32_t *, &b->flow_mark);
|
||
}
|
||
#endif
|
||
|
||
#ifdef DPDK_NETDEV
|
||
BUILD_ASSERT_DECL(offsetof(struct dp_packet, mbuf) == 0);
|
||
|
||
static inline void
|
||
dp_packet_init_specific(struct dp_packet *p)
|
||
{
|
||
/* This initialization is needed for packets that do not come from DPDK
|
||
* interfaces, when vswitchd is built with --with-dpdk. */
|
||
p->mbuf.ol_flags = p->mbuf.tx_offload = p->mbuf.packet_type = 0;
|
||
p->mbuf.nb_segs = 1;
|
||
p->mbuf.next = NULL;
|
||
}
|
||
|
||
static inline void *
|
||
dp_packet_base(const struct dp_packet *b)
|
||
{
|
||
return b->mbuf.buf_addr;
|
||
}
|
||
|
||
static inline void
|
||
dp_packet_set_base(struct dp_packet *b, void *d)
|
||
{
|
||
b->mbuf.buf_addr = d;
|
||
}
|
||
|
||
static inline uint32_t
|
||
dp_packet_size(const struct dp_packet *b)
|
||
{
|
||
return b->mbuf.pkt_len;
|
||
}
|
||
|
||
static inline void
|
||
dp_packet_set_size(struct dp_packet *b, uint32_t v)
|
||
{
|
||
/* netdev-dpdk does not currently support segmentation; consequently, for
|
||
* all intents and purposes, 'data_len' (16 bit) and 'pkt_len' (32 bit) may
|
||
* be used interchangably.
|
||
*
|
||
* On the datapath, it is expected that the size of packets
|
||
* (and thus 'v') will always be <= UINT16_MAX; this means that there is no
|
||
* loss of accuracy in assigning 'v' to 'data_len'.
|
||
*/
|
||
b->mbuf.data_len = (uint16_t)v; /* Current seg length. */
|
||
b->mbuf.pkt_len = v; /* Total length of all segments linked to
|
||
* this segment. */
|
||
}
|
||
|
||
static inline uint16_t
|
||
__packet_data(const struct dp_packet *b)
|
||
{
|
||
return b->mbuf.data_off;
|
||
}
|
||
|
||
static inline void
|
||
__packet_set_data(struct dp_packet *b, uint16_t v)
|
||
{
|
||
b->mbuf.data_off = v;
|
||
}
|
||
|
||
static inline uint16_t
|
||
dp_packet_get_allocated(const struct dp_packet *b)
|
||
{
|
||
return b->mbuf.buf_len;
|
||
}
|
||
|
||
static inline void
|
||
dp_packet_set_allocated(struct dp_packet *b, uint16_t s)
|
||
{
|
||
b->mbuf.buf_len = s;
|
||
}
|
||
|
||
#else /* DPDK_NETDEV */
|
||
|
||
static inline void
|
||
dp_packet_init_specific(struct dp_packet *p OVS_UNUSED)
|
||
{
|
||
/* There are no implementation-specific fields for initialization. */
|
||
}
|
||
|
||
static inline void *
|
||
dp_packet_base(const struct dp_packet *b)
|
||
{
|
||
return b->base_;
|
||
}
|
||
|
||
static inline void
|
||
dp_packet_set_base(struct dp_packet *b, void *d)
|
||
{
|
||
b->base_ = d;
|
||
}
|
||
|
||
static inline uint32_t
|
||
dp_packet_size(const struct dp_packet *b)
|
||
{
|
||
return b->size_;
|
||
}
|
||
|
||
static inline void
|
||
dp_packet_set_size(struct dp_packet *b, uint32_t v)
|
||
{
|
||
b->size_ = v;
|
||
}
|
||
|
||
static inline uint16_t
|
||
__packet_data(const struct dp_packet *b)
|
||
{
|
||
return b->data_ofs;
|
||
}
|
||
|
||
static inline void
|
||
__packet_set_data(struct dp_packet *b, uint16_t v)
|
||
{
|
||
b->data_ofs = v;
|
||
}
|
||
|
||
static inline uint16_t
|
||
dp_packet_get_allocated(const struct dp_packet *b)
|
||
{
|
||
return b->allocated_;
|
||
}
|
||
|
||
static inline void
|
||
dp_packet_set_allocated(struct dp_packet *b, uint16_t s)
|
||
{
|
||
b->allocated_ = s;
|
||
}
|
||
|
||
#endif /* DPDK_NETDEV */
|
||
|
||
static inline void
|
||
dp_packet_reset_cutlen(struct dp_packet *b)
|
||
{
|
||
b->cutlen = 0;
|
||
}
|
||
|
||
static inline uint32_t
|
||
dp_packet_set_cutlen(struct dp_packet *b, uint32_t max_len)
|
||
{
|
||
if (max_len < ETH_HEADER_LEN) {
|
||
max_len = ETH_HEADER_LEN;
|
||
}
|
||
|
||
if (max_len >= dp_packet_size(b)) {
|
||
b->cutlen = 0;
|
||
} else {
|
||
b->cutlen = dp_packet_size(b) - max_len;
|
||
}
|
||
return b->cutlen;
|
||
}
|
||
|
||
static inline uint32_t
|
||
dp_packet_get_cutlen(const struct dp_packet *b)
|
||
{
|
||
/* Always in valid range if user uses dp_packet_set_cutlen. */
|
||
return b->cutlen;
|
||
}
|
||
|
||
static inline uint32_t
|
||
dp_packet_get_send_len(const struct dp_packet *b)
|
||
{
|
||
return dp_packet_size(b) - dp_packet_get_cutlen(b);
|
||
}
|
||
|
||
static inline void *
|
||
dp_packet_data(const struct dp_packet *b)
|
||
{
|
||
return __packet_data(b) != UINT16_MAX
|
||
? (char *) dp_packet_base(b) + __packet_data(b) : NULL;
|
||
}
|
||
|
||
static inline void
|
||
dp_packet_set_data(struct dp_packet *b, void *data)
|
||
{
|
||
if (data) {
|
||
__packet_set_data(b, (char *) data - (char *) dp_packet_base(b));
|
||
} else {
|
||
__packet_set_data(b, UINT16_MAX);
|
||
}
|
||
}
|
||
|
||
static inline void
|
||
dp_packet_reset_packet(struct dp_packet *b, int off)
|
||
{
|
||
dp_packet_set_size(b, dp_packet_size(b) - off);
|
||
dp_packet_set_data(b, ((unsigned char *) dp_packet_data(b) + off));
|
||
dp_packet_reset_offsets(b);
|
||
}
|
||
|
||
enum { NETDEV_MAX_BURST = 32 }; /* Maximum number packets in a batch. */
|
||
|
||
struct dp_packet_batch {
|
||
size_t count;
|
||
bool trunc; /* true if the batch needs truncate. */
|
||
struct dp_packet *packets[NETDEV_MAX_BURST];
|
||
};
|
||
|
||
static inline void
|
||
dp_packet_batch_init(struct dp_packet_batch *batch)
|
||
{
|
||
batch->count = 0;
|
||
batch->trunc = false;
|
||
}
|
||
|
||
static inline void
|
||
dp_packet_batch_add__(struct dp_packet_batch *batch,
|
||
struct dp_packet *packet, size_t limit)
|
||
{
|
||
if (batch->count < limit) {
|
||
batch->packets[batch->count++] = packet;
|
||
} else {
|
||
dp_packet_delete(packet);
|
||
}
|
||
}
|
||
|
||
/* When the batch is full, 'packet' will be dropped and freed. */
|
||
static inline void
|
||
dp_packet_batch_add(struct dp_packet_batch *batch, struct dp_packet *packet)
|
||
{
|
||
dp_packet_batch_add__(batch, packet, NETDEV_MAX_BURST);
|
||
}
|
||
|
||
static inline size_t
|
||
dp_packet_batch_size(const struct dp_packet_batch *batch)
|
||
{
|
||
return batch->count;
|
||
}
|
||
|
||
/* Clear 'batch' for refill. Use dp_packet_batch_refill() to add
|
||
* packets back into the 'batch'. */
|
||
static inline void
|
||
dp_packet_batch_refill_init(struct dp_packet_batch *batch)
|
||
{
|
||
batch->count = 0;
|
||
};
|
||
|
||
static inline void
|
||
dp_packet_batch_refill(struct dp_packet_batch *batch,
|
||
struct dp_packet *packet, size_t idx)
|
||
{
|
||
dp_packet_batch_add__(batch, packet, MIN(NETDEV_MAX_BURST, idx + 1));
|
||
}
|
||
|
||
static inline void
|
||
dp_packet_batch_init_packet(struct dp_packet_batch *batch, struct dp_packet *p)
|
||
{
|
||
dp_packet_batch_init(batch);
|
||
batch->count = 1;
|
||
batch->packets[0] = p;
|
||
}
|
||
|
||
static inline bool
|
||
dp_packet_batch_is_empty(const struct dp_packet_batch *batch)
|
||
{
|
||
return !dp_packet_batch_size(batch);
|
||
}
|
||
|
||
static inline bool
|
||
dp_packet_batch_is_full(const struct dp_packet_batch *batch)
|
||
{
|
||
return dp_packet_batch_size(batch) == NETDEV_MAX_BURST;
|
||
}
|
||
|
||
#define DP_PACKET_BATCH_FOR_EACH(IDX, PACKET, BATCH) \
|
||
for (size_t IDX = 0; IDX < dp_packet_batch_size(BATCH); IDX++) \
|
||
if (PACKET = (BATCH)->packets[IDX], true)
|
||
|
||
/* Use this macro for cases where some packets in the 'BATCH' may be
|
||
* dropped after going through each packet in the 'BATCH'.
|
||
*
|
||
* For packets to stay in the 'BATCH', they need to be refilled back
|
||
* into the 'BATCH' by calling dp_packet_batch_refill(). Caller owns
|
||
* the packets that are not refilled.
|
||
*
|
||
* Caller needs to supply 'SIZE', that stores the current number of
|
||
* packets in 'BATCH'. It is best to declare this variable with
|
||
* the 'const' modifier since it should not be modified by
|
||
* the iterator. */
|
||
#define DP_PACKET_BATCH_REFILL_FOR_EACH(IDX, SIZE, PACKET, BATCH) \
|
||
for (dp_packet_batch_refill_init(BATCH), IDX=0; IDX < SIZE; IDX++) \
|
||
if (PACKET = (BATCH)->packets[IDX], true)
|
||
|
||
static inline void
|
||
dp_packet_batch_clone(struct dp_packet_batch *dst,
|
||
struct dp_packet_batch *src)
|
||
{
|
||
struct dp_packet *packet;
|
||
|
||
dp_packet_batch_init(dst);
|
||
DP_PACKET_BATCH_FOR_EACH (i, packet, src) {
|
||
if (i + 1 < dp_packet_batch_size(src)) {
|
||
OVS_PREFETCH(src->packets[i + 1]);
|
||
}
|
||
|
||
uint32_t headroom = dp_packet_headroom(packet);
|
||
struct dp_packet *pkt_clone;
|
||
|
||
pkt_clone = dp_packet_clone_with_headroom(packet, headroom);
|
||
dp_packet_batch_add(dst, pkt_clone);
|
||
}
|
||
dst->trunc = src->trunc;
|
||
}
|
||
|
||
static inline void
|
||
dp_packet_delete_batch(struct dp_packet_batch *batch, bool should_steal)
|
||
{
|
||
if (should_steal) {
|
||
struct dp_packet *packet;
|
||
|
||
DP_PACKET_BATCH_FOR_EACH (i, packet, batch) {
|
||
dp_packet_delete(packet);
|
||
}
|
||
dp_packet_batch_init(batch);
|
||
}
|
||
}
|
||
|
||
static inline void
|
||
dp_packet_batch_init_packet_fields(struct dp_packet_batch *batch)
|
||
{
|
||
struct dp_packet *packet;
|
||
|
||
DP_PACKET_BATCH_FOR_EACH (i, packet, batch) {
|
||
dp_packet_reset_cutlen(packet);
|
||
packet->packet_type = htonl(PT_ETH);
|
||
}
|
||
}
|
||
|
||
static inline void
|
||
dp_packet_batch_apply_cutlen(struct dp_packet_batch *batch)
|
||
{
|
||
if (batch->trunc) {
|
||
struct dp_packet *packet;
|
||
|
||
DP_PACKET_BATCH_FOR_EACH (i, packet, batch) {
|
||
dp_packet_set_size(packet, dp_packet_get_send_len(packet));
|
||
dp_packet_reset_cutlen(packet);
|
||
}
|
||
batch->trunc = false;
|
||
}
|
||
}
|
||
|
||
static inline void
|
||
dp_packet_batch_reset_cutlen(struct dp_packet_batch *batch)
|
||
{
|
||
if (batch->trunc) {
|
||
struct dp_packet *packet;
|
||
|
||
DP_PACKET_BATCH_FOR_EACH (i, packet, batch) {
|
||
dp_packet_reset_cutlen(packet);
|
||
}
|
||
batch->trunc = false;
|
||
}
|
||
}
|
||
|
||
/* Returns the RSS hash of the packet 'p'. Note that the returned value is
|
||
* correct only if 'dp_packet_rss_valid(p)' returns 'true'. */
|
||
static inline uint32_t
|
||
dp_packet_get_rss_hash(const struct dp_packet *p)
|
||
{
|
||
return *dp_packet_rss_ptr(p);
|
||
}
|
||
|
||
static inline void
|
||
dp_packet_set_rss_hash(struct dp_packet *p, uint32_t hash)
|
||
{
|
||
*dp_packet_rss_ptr(p) = hash;
|
||
*dp_packet_ol_flags_ptr(p) |= DP_PACKET_OL_RSS_HASH;
|
||
}
|
||
|
||
static inline bool
|
||
dp_packet_rss_valid(const struct dp_packet *p)
|
||
{
|
||
return *dp_packet_ol_flags_ptr(p) & DP_PACKET_OL_RSS_HASH;
|
||
}
|
||
|
||
static inline void
|
||
dp_packet_reset_offload(struct dp_packet *p)
|
||
{
|
||
*dp_packet_ol_flags_ptr(p) &= ~DP_PACKET_OL_SUPPORTED_MASK;
|
||
}
|
||
|
||
static inline bool
|
||
dp_packet_has_flow_mark(const struct dp_packet *p, uint32_t *mark)
|
||
{
|
||
if (*dp_packet_ol_flags_ptr(p) & DP_PACKET_OL_FLOW_MARK) {
|
||
*mark = *dp_packet_flow_mark_ptr(p);
|
||
return true;
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
static inline void
|
||
dp_packet_set_flow_mark(struct dp_packet *p, uint32_t mark)
|
||
{
|
||
*dp_packet_flow_mark_ptr(p) = mark;
|
||
*dp_packet_ol_flags_ptr(p) |= DP_PACKET_OL_FLOW_MARK;
|
||
}
|
||
|
||
/* Returns the L4 cksum offload bitmask. */
|
||
static inline uint64_t
|
||
dp_packet_hwol_l4_mask(const struct dp_packet *b)
|
||
{
|
||
return *dp_packet_ol_flags_ptr(b) & DP_PACKET_OL_TX_L4_MASK;
|
||
}
|
||
|
||
/* Return true if the packet 'b' requested L4 checksum offload. */
|
||
static inline bool
|
||
dp_packet_hwol_tx_l4_checksum(const struct dp_packet *b)
|
||
{
|
||
return !!dp_packet_hwol_l4_mask(b);
|
||
}
|
||
|
||
/* Returns 'true' if packet 'b' is marked for TCP segmentation offloading. */
|
||
static inline bool
|
||
dp_packet_hwol_is_tso(const struct dp_packet *b)
|
||
{
|
||
return !!(*dp_packet_ol_flags_ptr(b) & DP_PACKET_OL_TX_TCP_SEG);
|
||
}
|
||
|
||
/* Returns 'true' if packet 'b' is marked for IPv4 checksum offloading. */
|
||
static inline bool
|
||
dp_packet_hwol_is_ipv4(const struct dp_packet *b)
|
||
{
|
||
return !!(*dp_packet_ol_flags_ptr(b) & DP_PACKET_OL_TX_IPV4);
|
||
}
|
||
|
||
/* Returns 'true' if packet 'b' is marked for TCP checksum offloading. */
|
||
static inline bool
|
||
dp_packet_hwol_l4_is_tcp(const struct dp_packet *b)
|
||
{
|
||
return (*dp_packet_ol_flags_ptr(b) & DP_PACKET_OL_TX_L4_MASK) ==
|
||
DP_PACKET_OL_TX_TCP_CKSUM;
|
||
}
|
||
|
||
/* Returns 'true' if packet 'b' is marked for UDP checksum offloading. */
|
||
static inline bool
|
||
dp_packet_hwol_l4_is_udp(struct dp_packet *b)
|
||
{
|
||
return (*dp_packet_ol_flags_ptr(b) & DP_PACKET_OL_TX_L4_MASK) ==
|
||
DP_PACKET_OL_TX_UDP_CKSUM;
|
||
}
|
||
|
||
/* Returns 'true' if packet 'b' is marked for SCTP checksum offloading. */
|
||
static inline bool
|
||
dp_packet_hwol_l4_is_sctp(struct dp_packet *b)
|
||
{
|
||
return (*dp_packet_ol_flags_ptr(b) & DP_PACKET_OL_TX_L4_MASK) ==
|
||
DP_PACKET_OL_TX_SCTP_CKSUM;
|
||
}
|
||
|
||
/* Mark packet 'b' for IPv4 checksum offloading. */
|
||
static inline void
|
||
dp_packet_hwol_set_tx_ipv4(struct dp_packet *b)
|
||
{
|
||
*dp_packet_ol_flags_ptr(b) |= DP_PACKET_OL_TX_IPV4;
|
||
}
|
||
|
||
/* Mark packet 'b' for IPv6 checksum offloading. */
|
||
static inline void
|
||
dp_packet_hwol_set_tx_ipv6(struct dp_packet *b)
|
||
{
|
||
*dp_packet_ol_flags_ptr(b) |= DP_PACKET_OL_TX_IPV6;
|
||
}
|
||
|
||
/* Mark packet 'b' for TCP checksum offloading. It implies that either
|
||
* the packet 'b' is marked for IPv4 or IPv6 checksum offloading. */
|
||
static inline void
|
||
dp_packet_hwol_set_csum_tcp(struct dp_packet *b)
|
||
{
|
||
*dp_packet_ol_flags_ptr(b) |= DP_PACKET_OL_TX_TCP_CKSUM;
|
||
}
|
||
|
||
/* Mark packet 'b' for UDP checksum offloading. It implies that either
|
||
* the packet 'b' is marked for IPv4 or IPv6 checksum offloading. */
|
||
static inline void
|
||
dp_packet_hwol_set_csum_udp(struct dp_packet *b)
|
||
{
|
||
*dp_packet_ol_flags_ptr(b) |= DP_PACKET_OL_TX_UDP_CKSUM;
|
||
}
|
||
|
||
/* Mark packet 'b' for SCTP checksum offloading. It implies that either
|
||
* the packet 'b' is marked for IPv4 or IPv6 checksum offloading. */
|
||
static inline void
|
||
dp_packet_hwol_set_csum_sctp(struct dp_packet *b)
|
||
{
|
||
*dp_packet_ol_flags_ptr(b) |= DP_PACKET_OL_TX_SCTP_CKSUM;
|
||
}
|
||
|
||
/* Mark packet 'b' for TCP segmentation offloading. It implies that
|
||
* either the packet 'b' is marked for IPv4 or IPv6 checksum offloading
|
||
* and also for TCP checksum offloading. */
|
||
static inline void
|
||
dp_packet_hwol_set_tcp_seg(struct dp_packet *b)
|
||
{
|
||
*dp_packet_ol_flags_ptr(b) |= DP_PACKET_OL_TX_TCP_SEG;
|
||
}
|
||
|
||
static inline bool
|
||
dp_packet_ip_checksum_valid(const struct dp_packet *p)
|
||
{
|
||
return (*dp_packet_ol_flags_ptr(p) & DP_PACKET_OL_RX_IP_CKSUM_MASK) ==
|
||
DP_PACKET_OL_RX_IP_CKSUM_GOOD;
|
||
}
|
||
|
||
static inline bool
|
||
dp_packet_ip_checksum_bad(const struct dp_packet *p)
|
||
{
|
||
return (*dp_packet_ol_flags_ptr(p) & DP_PACKET_OL_RX_IP_CKSUM_MASK) ==
|
||
DP_PACKET_OL_RX_IP_CKSUM_BAD;
|
||
}
|
||
|
||
static inline bool
|
||
dp_packet_l4_checksum_valid(const struct dp_packet *p)
|
||
{
|
||
return (*dp_packet_ol_flags_ptr(p) & DP_PACKET_OL_RX_L4_CKSUM_MASK) ==
|
||
DP_PACKET_OL_RX_L4_CKSUM_GOOD;
|
||
}
|
||
|
||
static inline bool
|
||
dp_packet_l4_checksum_bad(const struct dp_packet *p)
|
||
{
|
||
return (*dp_packet_ol_flags_ptr(p) & DP_PACKET_OL_RX_L4_CKSUM_MASK) ==
|
||
DP_PACKET_OL_RX_L4_CKSUM_BAD;
|
||
}
|
||
|
||
static inline void ALWAYS_INLINE
|
||
dp_packet_update_rss_hash_ipv4_tcp_udp(struct dp_packet *packet)
|
||
{
|
||
if (dp_packet_rss_valid(packet)) {
|
||
return;
|
||
}
|
||
|
||
const uint8_t *pkt = dp_packet_data(packet);
|
||
const uint16_t l3_ofs = packet->l3_ofs;
|
||
const void *ipv4_src = &pkt[l3_ofs + offsetof(struct ip_header, ip_src)];
|
||
const void *ipv4_dst = &pkt[l3_ofs + offsetof(struct ip_header, ip_dst)];
|
||
const void *l4_ports = &pkt[packet->l4_ofs];
|
||
uint32_t ip_src, ip_dst, ports;
|
||
uint32_t hash = 0;
|
||
|
||
memcpy(&ip_src, ipv4_src, sizeof ip_src);
|
||
memcpy(&ip_dst, ipv4_dst, sizeof ip_dst);
|
||
memcpy(&ports, l4_ports, sizeof ports);
|
||
|
||
/* IPv4 Src and Dst. */
|
||
hash = hash_add(hash, ip_src);
|
||
hash = hash_add(hash, ip_dst);
|
||
/* IPv4 proto. */
|
||
hash = hash_add(hash,
|
||
pkt[l3_ofs + offsetof(struct ip_header, ip_proto)]);
|
||
/* L4 ports. */
|
||
hash = hash_add(hash, ports);
|
||
hash = hash_finish(hash, 42);
|
||
|
||
dp_packet_set_rss_hash(packet, hash);
|
||
}
|
||
|
||
static inline void ALWAYS_INLINE
|
||
dp_packet_update_rss_hash_ipv6_tcp_udp(struct dp_packet *packet)
|
||
{
|
||
if (dp_packet_rss_valid(packet)) {
|
||
return;
|
||
}
|
||
|
||
const uint8_t *pkt = dp_packet_data(packet);
|
||
const uint16_t l3_ofs = packet->l3_ofs;
|
||
uint32_t ipv6_src_off = offsetof(struct ovs_16aligned_ip6_hdr, ip6_src);
|
||
uint32_t ipv6_dst_off = offsetof(struct ovs_16aligned_ip6_hdr, ip6_dst);
|
||
uint32_t ipv6_proto_off = offsetof(struct ovs_16aligned_ip6_hdr,
|
||
ip6_ctlun.ip6_un1.ip6_un1_nxt);
|
||
const void *ipv6_src_l = &pkt[l3_ofs + ipv6_src_off];
|
||
const void *ipv6_src_h = &pkt[l3_ofs + ipv6_src_off + 8];
|
||
const void *ipv6_dst_l = &pkt[l3_ofs + ipv6_dst_off];
|
||
const void *ipv6_dst_h = &pkt[l3_ofs + ipv6_dst_off + 8];
|
||
const void *l4_ports = &pkt[packet->l4_ofs];
|
||
uint64_t ipv6_src_lo, ipv6_src_hi;
|
||
uint64_t ipv6_dst_lo, ipv6_dst_hi;
|
||
uint32_t ports;
|
||
uint32_t hash = 0;
|
||
|
||
memcpy(&ipv6_src_lo, ipv6_src_l, sizeof ipv6_src_lo);
|
||
memcpy(&ipv6_src_hi, ipv6_src_h, sizeof ipv6_src_hi);
|
||
memcpy(&ipv6_dst_lo, ipv6_dst_l, sizeof ipv6_dst_lo);
|
||
memcpy(&ipv6_dst_hi, ipv6_dst_h, sizeof ipv6_dst_hi);
|
||
memcpy(&ports, l4_ports, sizeof ports);
|
||
|
||
/* IPv6 Src and Dst. */
|
||
hash = hash_add64(hash, ipv6_src_lo);
|
||
hash = hash_add64(hash, ipv6_src_hi);
|
||
hash = hash_add64(hash, ipv6_dst_lo);
|
||
hash = hash_add64(hash, ipv6_dst_hi);
|
||
/* IPv6 proto. */
|
||
hash = hash_add(hash, pkt[l3_ofs + ipv6_proto_off]);
|
||
/* L4 ports. */
|
||
hash = hash_add(hash, ports);
|
||
hash = hash_finish(hash, 42);
|
||
|
||
dp_packet_set_rss_hash(packet, hash);
|
||
}
|
||
|
||
#ifdef __cplusplus
|
||
}
|
||
#endif
|
||
|
||
#endif /* dp-packet.h */
|