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42 #include <sys/queue.h>
45 #include <rte_common.h>
46 #include <rte_byteorder.h>
48 #include <rte_debug.h>
49 #include <rte_cycles.h>
50 #include <rte_memory.h>
51 #include <rte_memcpy.h>
52 #include <rte_launch.h>
54 #include <rte_per_lcore.h>
55 #include <rte_lcore.h>
56 #include <rte_atomic.h>
57 #include <rte_branch_prediction.h>
58 #include <rte_mempool.h>
60 #include <rte_interrupts.h>
62 #include <rte_ether.h>
63 #include <rte_ethdev.h>
65 #include <rte_string_fns.h>
71 * MAC swap forwarding mode: Swap the source and the destination Ethernet
72 * addresses of packets before forwarding them.
75 pkt_burst_mac_swap(struct fwd_stream *fs)
77 struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
80 struct ether_hdr *eth_hdr;
81 struct ether_addr addr;
86 uint64_t ol_flags = 0;
88 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
94 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
95 start_tsc = rte_rdtsc();
99 * Receive a burst of packets and forward them.
101 nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
103 if (unlikely(nb_rx == 0))
106 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
107 fs->rx_burst_stats.pkt_burst_spread[nb_rx]++;
109 fs->rx_packets += nb_rx;
110 txp = &ports[fs->tx_port];
111 tx_offloads = txp->dev_conf.txmode.offloads;
112 if (tx_offloads & DEV_TX_OFFLOAD_VLAN_INSERT)
113 ol_flags = PKT_TX_VLAN_PKT;
114 if (tx_offloads & DEV_TX_OFFLOAD_QINQ_INSERT)
115 ol_flags |= PKT_TX_QINQ_PKT;
116 if (tx_offloads & DEV_TX_OFFLOAD_MACSEC_INSERT)
117 ol_flags |= PKT_TX_MACSEC;
118 for (i = 0; i < nb_rx; i++) {
119 if (likely(i < nb_rx - 1))
120 rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[i + 1],
123 eth_hdr = rte_pktmbuf_mtod(mb, struct ether_hdr *);
125 /* Swap dest and src mac addresses. */
126 ether_addr_copy(ð_hdr->d_addr, &addr);
127 ether_addr_copy(ð_hdr->s_addr, ð_hdr->d_addr);
128 ether_addr_copy(&addr, ð_hdr->s_addr);
130 mb->ol_flags &= IND_ATTACHED_MBUF | EXT_ATTACHED_MBUF;
131 mb->ol_flags |= ol_flags;
132 mb->l2_len = sizeof(struct ether_hdr);
133 mb->l3_len = sizeof(struct ipv4_hdr);
134 mb->vlan_tci = txp->tx_vlan_id;
135 mb->vlan_tci_outer = txp->tx_vlan_id_outer;
137 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_rx);
141 if (unlikely(nb_tx < nb_rx) && fs->retry_enabled) {
143 while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) {
144 rte_delay_us(burst_tx_delay_time);
145 nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
146 &pkts_burst[nb_tx], nb_rx - nb_tx);
149 fs->tx_packets += nb_tx;
150 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
151 fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
153 if (unlikely(nb_tx < nb_rx)) {
154 fs->fwd_dropped += (nb_rx - nb_tx);
156 rte_pktmbuf_free(pkts_burst[nb_tx]);
157 } while (++nb_tx < nb_rx);
159 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
160 end_tsc = rte_rdtsc();
161 core_cycles = (end_tsc - start_tsc);
162 fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
166 struct fwd_engine mac_swap_engine = {
167 .fwd_mode_name = "macswap",
168 .port_fwd_begin = NULL,
169 .port_fwd_end = NULL,
170 .packet_fwd = pkt_burst_mac_swap,