DPDK  20.08.0
examples/l3fwd/l3fwd_lpm.c
/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2016 Intel Corporation
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <inttypes.h>
#include <sys/types.h>
#include <string.h>
#include <sys/queue.h>
#include <stdarg.h>
#include <errno.h>
#include <getopt.h>
#include <stdbool.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <rte_debug.h>
#include <rte_ether.h>
#include <rte_ethdev.h>
#include <rte_cycles.h>
#include <rte_mbuf.h>
#include <rte_ip.h>
#include <rte_tcp.h>
#include <rte_udp.h>
#include <rte_lpm.h>
#include <rte_lpm6.h>
#include "l3fwd.h"
#include "l3fwd_event.h"
struct ipv4_l3fwd_lpm_route {
uint32_t ip;
uint8_t depth;
uint8_t if_out;
};
struct ipv6_l3fwd_lpm_route {
uint8_t ip[16];
uint8_t depth;
uint8_t if_out;
};
/* 198.18.0.0/16 are set aside for RFC2544 benchmarking (RFC5735). */
static const struct ipv4_l3fwd_lpm_route ipv4_l3fwd_lpm_route_array[] = {
{RTE_IPV4(198, 18, 0, 0), 24, 0},
{RTE_IPV4(198, 18, 1, 0), 24, 1},
{RTE_IPV4(198, 18, 2, 0), 24, 2},
{RTE_IPV4(198, 18, 3, 0), 24, 3},
{RTE_IPV4(198, 18, 4, 0), 24, 4},
{RTE_IPV4(198, 18, 5, 0), 24, 5},
{RTE_IPV4(198, 18, 6, 0), 24, 6},
{RTE_IPV4(198, 18, 7, 0), 24, 7},
};
/* 2001:0200::/48 is IANA reserved range for IPv6 benchmarking (RFC5180) */
static const struct ipv6_l3fwd_lpm_route ipv6_l3fwd_lpm_route_array[] = {
{{32, 1, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, 48, 0},
{{32, 1, 2, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0}, 48, 1},
{{32, 1, 2, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0}, 48, 2},
{{32, 1, 2, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0}, 48, 3},
{{32, 1, 2, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0}, 48, 4},
{{32, 1, 2, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0}, 48, 5},
{{32, 1, 2, 0, 0, 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 0}, 48, 6},
{{32, 1, 2, 0, 0, 0, 0, 0, 0, 7, 0, 0, 0, 0, 0, 0}, 48, 7},
};
#define IPV4_L3FWD_LPM_MAX_RULES 1024
#define IPV4_L3FWD_LPM_NUMBER_TBL8S (1 << 8)
#define IPV6_L3FWD_LPM_MAX_RULES 1024
#define IPV6_L3FWD_LPM_NUMBER_TBL8S (1 << 16)
static struct rte_lpm *ipv4_l3fwd_lpm_lookup_struct[NB_SOCKETS];
static struct rte_lpm6 *ipv6_l3fwd_lpm_lookup_struct[NB_SOCKETS];
static inline uint16_t
lpm_get_ipv4_dst_port(const struct rte_ipv4_hdr *ipv4_hdr,
uint16_t portid,
struct rte_lpm *ipv4_l3fwd_lookup_struct)
{
uint32_t dst_ip = rte_be_to_cpu_32(ipv4_hdr->dst_addr);
uint32_t next_hop;
if (rte_lpm_lookup(ipv4_l3fwd_lookup_struct, dst_ip, &next_hop) == 0)
return next_hop;
else
return portid;
}
static inline uint16_t
lpm_get_ipv6_dst_port(const struct rte_ipv6_hdr *ipv6_hdr,
uint16_t portid,
struct rte_lpm6 *ipv6_l3fwd_lookup_struct)
{
const uint8_t *dst_ip = ipv6_hdr->dst_addr;
uint32_t next_hop;
if (rte_lpm6_lookup(ipv6_l3fwd_lookup_struct, dst_ip, &next_hop) == 0)
return next_hop;
else
return portid;
}
static __rte_always_inline uint16_t
lpm_get_dst_port(const struct lcore_conf *qconf, struct rte_mbuf *pkt,
uint16_t portid)
{
struct rte_ipv6_hdr *ipv6_hdr;
struct rte_ipv4_hdr *ipv4_hdr;
struct rte_ether_hdr *eth_hdr;
if (RTE_ETH_IS_IPV4_HDR(pkt->packet_type)) {
eth_hdr = rte_pktmbuf_mtod(pkt, struct rte_ether_hdr *);
ipv4_hdr = (struct rte_ipv4_hdr *)(eth_hdr + 1);
return lpm_get_ipv4_dst_port(ipv4_hdr, portid,
qconf->ipv4_lookup_struct);
} else if (RTE_ETH_IS_IPV6_HDR(pkt->packet_type)) {
eth_hdr = rte_pktmbuf_mtod(pkt, struct rte_ether_hdr *);
ipv6_hdr = (struct rte_ipv6_hdr *)(eth_hdr + 1);
return lpm_get_ipv6_dst_port(ipv6_hdr, portid,
qconf->ipv6_lookup_struct);
}
return portid;
}
/*
* lpm_get_dst_port optimized routine for packets where dst_ipv4 is already
* precalculated. If packet is ipv6 dst_addr is taken directly from packet
* header and dst_ipv4 value is not used.
*/
static __rte_always_inline uint16_t
lpm_get_dst_port_with_ipv4(const struct lcore_conf *qconf, struct rte_mbuf *pkt,
uint32_t dst_ipv4, uint16_t portid)
{
uint32_t next_hop;
struct rte_ipv6_hdr *ipv6_hdr;
struct rte_ether_hdr *eth_hdr;
if (RTE_ETH_IS_IPV4_HDR(pkt->packet_type)) {
return (uint16_t) ((rte_lpm_lookup(qconf->ipv4_lookup_struct,
dst_ipv4, &next_hop) == 0)
? next_hop : portid);
} else if (RTE_ETH_IS_IPV6_HDR(pkt->packet_type)) {
eth_hdr = rte_pktmbuf_mtod(pkt, struct rte_ether_hdr *);
ipv6_hdr = (struct rte_ipv6_hdr *)(eth_hdr + 1);
return (uint16_t) ((rte_lpm6_lookup(qconf->ipv6_lookup_struct,
ipv6_hdr->dst_addr, &next_hop) == 0)
? next_hop : portid);
}
return portid;
}
#if defined(RTE_ARCH_X86)
#include "l3fwd_lpm_sse.h"
#elif defined RTE_MACHINE_CPUFLAG_NEON
#include "l3fwd_lpm_neon.h"
#elif defined(RTE_ARCH_PPC_64)
#include "l3fwd_lpm_altivec.h"
#else
#include "l3fwd_lpm.h"
#endif
/* main processing loop */
int
lpm_main_loop(__rte_unused void *dummy)
{
struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
unsigned lcore_id;
uint64_t prev_tsc, diff_tsc, cur_tsc;
int i, nb_rx;
uint16_t portid;
uint8_t queueid;
struct lcore_conf *qconf;
const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) /
US_PER_S * BURST_TX_DRAIN_US;
prev_tsc = 0;
lcore_id = rte_lcore_id();
qconf = &lcore_conf[lcore_id];
if (qconf->n_rx_queue == 0) {
RTE_LOG(INFO, L3FWD, "lcore %u has nothing to do\n", lcore_id);
return 0;
}
RTE_LOG(INFO, L3FWD, "entering main loop on lcore %u\n", lcore_id);
for (i = 0; i < qconf->n_rx_queue; i++) {
portid = qconf->rx_queue_list[i].port_id;
queueid = qconf->rx_queue_list[i].queue_id;
RTE_LOG(INFO, L3FWD,
" -- lcoreid=%u portid=%u rxqueueid=%hhu\n",
lcore_id, portid, queueid);
}
while (!force_quit) {
cur_tsc = rte_rdtsc();
/*
* TX burst queue drain
*/
diff_tsc = cur_tsc - prev_tsc;
if (unlikely(diff_tsc > drain_tsc)) {
for (i = 0; i < qconf->n_tx_port; ++i) {
portid = qconf->tx_port_id[i];
if (qconf->tx_mbufs[portid].len == 0)
continue;
send_burst(qconf,
qconf->tx_mbufs[portid].len,
portid);
qconf->tx_mbufs[portid].len = 0;
}
prev_tsc = cur_tsc;
}
/*
* Read packet from RX queues
*/
for (i = 0; i < qconf->n_rx_queue; ++i) {
portid = qconf->rx_queue_list[i].port_id;
queueid = qconf->rx_queue_list[i].queue_id;
nb_rx = rte_eth_rx_burst(portid, queueid, pkts_burst,
MAX_PKT_BURST);
if (nb_rx == 0)
continue;
#if defined RTE_ARCH_X86 || defined RTE_MACHINE_CPUFLAG_NEON \
|| defined RTE_ARCH_PPC_64
l3fwd_lpm_send_packets(nb_rx, pkts_burst,
portid, qconf);
#else
l3fwd_lpm_no_opt_send_packets(nb_rx, pkts_burst,
portid, qconf);
#endif /* X86 */
}
}
return 0;
}
static __rte_always_inline uint16_t
lpm_process_event_pkt(const struct lcore_conf *lconf, struct rte_mbuf *mbuf)
{
mbuf->port = lpm_get_dst_port(lconf, mbuf, mbuf->port);
#if defined RTE_ARCH_X86 || defined RTE_MACHINE_CPUFLAG_NEON \
|| defined RTE_ARCH_PPC_64
process_packet(mbuf, &mbuf->port);
#else
struct rte_ether_hdr *eth_hdr = rte_pktmbuf_mtod(mbuf,
struct rte_ether_hdr *);
#ifdef DO_RFC_1812_CHECKS
struct rte_ipv4_hdr *ipv4_hdr;
if (RTE_ETH_IS_IPV4_HDR(mbuf->packet_type)) {
/* Handle IPv4 headers.*/
ipv4_hdr = rte_pktmbuf_mtod_offset(mbuf,
struct rte_ipv4_hdr *,
sizeof(struct rte_ether_hdr));
if (is_valid_ipv4_pkt(ipv4_hdr, mbuf->pkt_len)
< 0) {
mbuf->port = BAD_PORT;
continue;
}
/* Update time to live and header checksum */
--(ipv4_hdr->time_to_live);
++(ipv4_hdr->hdr_checksum);
}
#endif
/* dst addr */
*(uint64_t *)&eth_hdr->d_addr = dest_eth_addr[mbuf->port];
/* src addr */
rte_ether_addr_copy(&ports_eth_addr[mbuf->port],
&eth_hdr->s_addr);
#endif
return mbuf->port;
}
static __rte_always_inline void
lpm_event_loop_single(struct l3fwd_event_resources *evt_rsrc,
const uint8_t flags)
{
const int event_p_id = l3fwd_get_free_event_port(evt_rsrc);
const uint8_t tx_q_id = evt_rsrc->evq.event_q_id[
evt_rsrc->evq.nb_queues - 1];
const uint8_t event_d_id = evt_rsrc->event_d_id;
struct lcore_conf *lconf;
unsigned int lcore_id;
struct rte_event ev;
if (event_p_id < 0)
return;
lcore_id = rte_lcore_id();
lconf = &lcore_conf[lcore_id];
RTE_LOG(INFO, L3FWD, "entering %s on lcore %u\n", __func__, lcore_id);
while (!force_quit) {
if (!rte_event_dequeue_burst(event_d_id, event_p_id, &ev, 1, 0))
continue;
if (lpm_process_event_pkt(lconf, ev.mbuf) == BAD_PORT) {
rte_pktmbuf_free(ev.mbuf);
continue;
}
if (flags & L3FWD_EVENT_TX_ENQ) {
ev.queue_id = tx_q_id;
ev.op = RTE_EVENT_OP_FORWARD;
while (rte_event_enqueue_burst(event_d_id, event_p_id,
&ev, 1) && !force_quit)
;
}
if (flags & L3FWD_EVENT_TX_DIRECT) {
rte_event_eth_tx_adapter_txq_set(ev.mbuf, 0);
while (!rte_event_eth_tx_adapter_enqueue(event_d_id,
event_p_id, &ev, 1, 0) &&
!force_quit)
;
}
}
}
static __rte_always_inline void
lpm_event_loop_burst(struct l3fwd_event_resources *evt_rsrc,
const uint8_t flags)
{
const int event_p_id = l3fwd_get_free_event_port(evt_rsrc);
const uint8_t tx_q_id = evt_rsrc->evq.event_q_id[
evt_rsrc->evq.nb_queues - 1];
const uint8_t event_d_id = evt_rsrc->event_d_id;
const uint16_t deq_len = evt_rsrc->deq_depth;
struct rte_event events[MAX_PKT_BURST];
struct lcore_conf *lconf;
unsigned int lcore_id;
int i, nb_enq, nb_deq;
if (event_p_id < 0)
return;
lcore_id = rte_lcore_id();
lconf = &lcore_conf[lcore_id];
RTE_LOG(INFO, L3FWD, "entering %s on lcore %u\n", __func__, lcore_id);
while (!force_quit) {
/* Read events from RX queues */
nb_deq = rte_event_dequeue_burst(event_d_id, event_p_id,
events, deq_len, 0);
if (nb_deq == 0) {
rte_pause();
continue;
}
for (i = 0; i < nb_deq; i++) {
if (flags & L3FWD_EVENT_TX_ENQ) {
events[i].queue_id = tx_q_id;
events[i].op = RTE_EVENT_OP_FORWARD;
}
if (flags & L3FWD_EVENT_TX_DIRECT)
rte_event_eth_tx_adapter_txq_set(events[i].mbuf,
0);
lpm_process_event_pkt(lconf, events[i].mbuf);
}
if (flags & L3FWD_EVENT_TX_ENQ) {
nb_enq = rte_event_enqueue_burst(event_d_id, event_p_id,
events, nb_deq);
while (nb_enq < nb_deq && !force_quit)
nb_enq += rte_event_enqueue_burst(event_d_id,
event_p_id, events + nb_enq,
nb_deq - nb_enq);
}
if (flags & L3FWD_EVENT_TX_DIRECT) {
nb_enq = rte_event_eth_tx_adapter_enqueue(event_d_id,
event_p_id, events, nb_deq, 0);
while (nb_enq < nb_deq && !force_quit)
nb_enq += rte_event_eth_tx_adapter_enqueue(
event_d_id, event_p_id,
events + nb_enq,
nb_deq - nb_enq, 0);
}
}
}
static __rte_always_inline void
lpm_event_loop(struct l3fwd_event_resources *evt_rsrc,
const uint8_t flags)
{
if (flags & L3FWD_EVENT_SINGLE)
lpm_event_loop_single(evt_rsrc, flags);
if (flags & L3FWD_EVENT_BURST)
lpm_event_loop_burst(evt_rsrc, flags);
}
int __rte_noinline
lpm_event_main_loop_tx_d(__rte_unused void *dummy)
{
struct l3fwd_event_resources *evt_rsrc =
l3fwd_get_eventdev_rsrc();
lpm_event_loop(evt_rsrc, L3FWD_EVENT_TX_DIRECT | L3FWD_EVENT_SINGLE);
return 0;
}
int __rte_noinline
lpm_event_main_loop_tx_d_burst(__rte_unused void *dummy)
{
struct l3fwd_event_resources *evt_rsrc =
l3fwd_get_eventdev_rsrc();
lpm_event_loop(evt_rsrc, L3FWD_EVENT_TX_DIRECT | L3FWD_EVENT_BURST);
return 0;
}
int __rte_noinline
lpm_event_main_loop_tx_q(__rte_unused void *dummy)
{
struct l3fwd_event_resources *evt_rsrc =
l3fwd_get_eventdev_rsrc();
lpm_event_loop(evt_rsrc, L3FWD_EVENT_TX_ENQ | L3FWD_EVENT_SINGLE);
return 0;
}
int __rte_noinline
lpm_event_main_loop_tx_q_burst(__rte_unused void *dummy)
{
struct l3fwd_event_resources *evt_rsrc =
l3fwd_get_eventdev_rsrc();
lpm_event_loop(evt_rsrc, L3FWD_EVENT_TX_ENQ | L3FWD_EVENT_BURST);
return 0;
}
void
setup_lpm(const int socketid)
{
struct rte_lpm6_config config;
struct rte_lpm_config config_ipv4;
unsigned i;
int ret;
char s[64];
char abuf[INET6_ADDRSTRLEN];
/* create the LPM table */
config_ipv4.max_rules = IPV4_L3FWD_LPM_MAX_RULES;
config_ipv4.number_tbl8s = IPV4_L3FWD_LPM_NUMBER_TBL8S;
config_ipv4.flags = 0;
snprintf(s, sizeof(s), "IPV4_L3FWD_LPM_%d", socketid);
ipv4_l3fwd_lpm_lookup_struct[socketid] =
rte_lpm_create(s, socketid, &config_ipv4);
if (ipv4_l3fwd_lpm_lookup_struct[socketid] == NULL)
rte_exit(EXIT_FAILURE,
"Unable to create the l3fwd LPM table on socket %d\n",
socketid);
/* populate the LPM table */
for (i = 0; i < RTE_DIM(ipv4_l3fwd_lpm_route_array); i++) {
struct in_addr in;
/* skip unused ports */
if ((1 << ipv4_l3fwd_lpm_route_array[i].if_out &
enabled_port_mask) == 0)
continue;
ret = rte_lpm_add(ipv4_l3fwd_lpm_lookup_struct[socketid],
ipv4_l3fwd_lpm_route_array[i].ip,
ipv4_l3fwd_lpm_route_array[i].depth,
ipv4_l3fwd_lpm_route_array[i].if_out);
if (ret < 0) {
rte_exit(EXIT_FAILURE,
"Unable to add entry %u to the l3fwd LPM table on socket %d\n",
i, socketid);
}
in.s_addr = htonl(ipv4_l3fwd_lpm_route_array[i].ip);
printf("LPM: Adding route %s / %d (%d)\n",
inet_ntop(AF_INET, &in, abuf, sizeof(abuf)),
ipv4_l3fwd_lpm_route_array[i].depth,
ipv4_l3fwd_lpm_route_array[i].if_out);
}
/* create the LPM6 table */
snprintf(s, sizeof(s), "IPV6_L3FWD_LPM_%d", socketid);
config.max_rules = IPV6_L3FWD_LPM_MAX_RULES;
config.number_tbl8s = IPV6_L3FWD_LPM_NUMBER_TBL8S;
config.flags = 0;
ipv6_l3fwd_lpm_lookup_struct[socketid] = rte_lpm6_create(s, socketid,
&config);
if (ipv6_l3fwd_lpm_lookup_struct[socketid] == NULL)
rte_exit(EXIT_FAILURE,
"Unable to create the l3fwd LPM table on socket %d\n",
socketid);
/* populate the LPM table */
for (i = 0; i < RTE_DIM(ipv6_l3fwd_lpm_route_array); i++) {
/* skip unused ports */
if ((1 << ipv6_l3fwd_lpm_route_array[i].if_out &
enabled_port_mask) == 0)
continue;
ret = rte_lpm6_add(ipv6_l3fwd_lpm_lookup_struct[socketid],
ipv6_l3fwd_lpm_route_array[i].ip,
ipv6_l3fwd_lpm_route_array[i].depth,
ipv6_l3fwd_lpm_route_array[i].if_out);
if (ret < 0) {
rte_exit(EXIT_FAILURE,
"Unable to add entry %u to the l3fwd LPM table on socket %d\n",
i, socketid);
}
printf("LPM: Adding route %s / %d (%d)\n",
inet_ntop(AF_INET6, ipv6_l3fwd_lpm_route_array[i].ip,
abuf, sizeof(abuf)),
ipv6_l3fwd_lpm_route_array[i].depth,
ipv6_l3fwd_lpm_route_array[i].if_out);
}
}
int
lpm_check_ptype(int portid)
{
int i, ret;
int ptype_l3_ipv4 = 0, ptype_l3_ipv6 = 0;
uint32_t ptype_mask = RTE_PTYPE_L3_MASK;
ret = rte_eth_dev_get_supported_ptypes(portid, ptype_mask, NULL, 0);
if (ret <= 0)
return 0;
uint32_t ptypes[ret];
ret = rte_eth_dev_get_supported_ptypes(portid, ptype_mask, ptypes, ret);
for (i = 0; i < ret; ++i) {
if (ptypes[i] & RTE_PTYPE_L3_IPV4)
ptype_l3_ipv4 = 1;
if (ptypes[i] & RTE_PTYPE_L3_IPV6)
ptype_l3_ipv6 = 1;
}
if (ptype_l3_ipv4 == 0)
printf("port %d cannot parse RTE_PTYPE_L3_IPV4\n", portid);
if (ptype_l3_ipv6 == 0)
printf("port %d cannot parse RTE_PTYPE_L3_IPV6\n", portid);
if (ptype_l3_ipv4 && ptype_l3_ipv6)
return 1;
return 0;
}
static inline void
lpm_parse_ptype(struct rte_mbuf *m)
{
struct rte_ether_hdr *eth_hdr;
uint32_t packet_type = RTE_PTYPE_UNKNOWN;
uint16_t ether_type;
eth_hdr = rte_pktmbuf_mtod(m, struct rte_ether_hdr *);
ether_type = eth_hdr->ether_type;
if (ether_type == rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV4))
packet_type |= RTE_PTYPE_L3_IPV4_EXT_UNKNOWN;
else if (ether_type == rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV6))
packet_type |= RTE_PTYPE_L3_IPV6_EXT_UNKNOWN;
m->packet_type = packet_type;
}
uint16_t
lpm_cb_parse_ptype(uint16_t port __rte_unused, uint16_t queue __rte_unused,
struct rte_mbuf *pkts[], uint16_t nb_pkts,
uint16_t max_pkts __rte_unused,
void *user_param __rte_unused)
{
unsigned int i;
if (unlikely(nb_pkts == 0))
return nb_pkts;
rte_prefetch0(rte_pktmbuf_mtod(pkts[0], struct ether_hdr *));
for (i = 0; i < (unsigned int) (nb_pkts - 1); ++i) {
rte_prefetch0(rte_pktmbuf_mtod(pkts[i+1],
struct ether_hdr *));
lpm_parse_ptype(pkts[i]);
}
lpm_parse_ptype(pkts[i]);
return nb_pkts;
}
/* Return ipv4/ipv6 lpm fwd lookup struct. */
void *
lpm_get_ipv4_l3fwd_lookup_struct(const int socketid)
{
return ipv4_l3fwd_lpm_lookup_struct[socketid];
}
void *
lpm_get_ipv6_l3fwd_lookup_struct(const int socketid)
{
return ipv6_l3fwd_lpm_lookup_struct[socketid];
}
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