DPDK  17.05.2
examples/kni/main.c
/*-
* BSD LICENSE
*
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* 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.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <inttypes.h>
#include <string.h>
#include <sys/queue.h>
#include <stdarg.h>
#include <errno.h>
#include <getopt.h>
#include <netinet/in.h>
#include <linux/if.h>
#include <linux/if_tun.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <signal.h>
#include <rte_common.h>
#include <rte_log.h>
#include <rte_memory.h>
#include <rte_memcpy.h>
#include <rte_memzone.h>
#include <rte_eal.h>
#include <rte_per_lcore.h>
#include <rte_launch.h>
#include <rte_atomic.h>
#include <rte_lcore.h>
#include <rte_branch_prediction.h>
#include <rte_interrupts.h>
#include <rte_pci.h>
#include <rte_debug.h>
#include <rte_ether.h>
#include <rte_ethdev.h>
#include <rte_log.h>
#include <rte_mempool.h>
#include <rte_mbuf.h>
#include <rte_string_fns.h>
#include <rte_cycles.h>
#include <rte_malloc.h>
#include <rte_kni.h>
/* Macros for printing using RTE_LOG */
#define RTE_LOGTYPE_APP RTE_LOGTYPE_USER1
/* Max size of a single packet */
#define MAX_PACKET_SZ 2048
/* Size of the data buffer in each mbuf */
#define MBUF_DATA_SZ (MAX_PACKET_SZ + RTE_PKTMBUF_HEADROOM)
/* Number of mbufs in mempool that is created */
#define NB_MBUF (8192 * 16)
/* How many packets to attempt to read from NIC in one go */
#define PKT_BURST_SZ 32
/* How many objects (mbufs) to keep in per-lcore mempool cache */
#define MEMPOOL_CACHE_SZ PKT_BURST_SZ
/* Number of RX ring descriptors */
#define NB_RXD 128
/* Number of TX ring descriptors */
#define NB_TXD 512
/* Total octets in ethernet header */
#define KNI_ENET_HEADER_SIZE 14
/* Total octets in the FCS */
#define KNI_ENET_FCS_SIZE 4
#define KNI_US_PER_SECOND 1000000
#define KNI_SECOND_PER_DAY 86400
#define KNI_MAX_KTHREAD 32
/*
* Structure of port parameters
*/
struct kni_port_params {
uint8_t port_id;/* Port ID */
unsigned lcore_rx; /* lcore ID for RX */
unsigned lcore_tx; /* lcore ID for TX */
uint32_t nb_lcore_k; /* Number of lcores for KNI multi kernel threads */
uint32_t nb_kni; /* Number of KNI devices to be created */
unsigned lcore_k[KNI_MAX_KTHREAD]; /* lcore ID list for kthreads */
struct rte_kni *kni[KNI_MAX_KTHREAD]; /* KNI context pointers */
} __rte_cache_aligned;
static struct kni_port_params *kni_port_params_array[RTE_MAX_ETHPORTS];
/* Options for configuring ethernet port */
static struct rte_eth_conf port_conf = {
.rxmode = {
.header_split = 0, /* Header Split disabled */
.hw_ip_checksum = 0, /* IP checksum offload disabled */
.hw_vlan_filter = 0, /* VLAN filtering disabled */
.jumbo_frame = 0, /* Jumbo Frame Support disabled */
.hw_strip_crc = 1, /* CRC stripped by hardware */
},
.txmode = {
.mq_mode = ETH_MQ_TX_NONE,
},
};
/* Mempool for mbufs */
static struct rte_mempool * pktmbuf_pool = NULL;
/* Mask of enabled ports */
static uint32_t ports_mask = 0;
/* Ports set in promiscuous mode off by default. */
static int promiscuous_on = 0;
/* Structure type for recording kni interface specific stats */
struct kni_interface_stats {
/* number of pkts received from NIC, and sent to KNI */
uint64_t rx_packets;
/* number of pkts received from NIC, but failed to send to KNI */
uint64_t rx_dropped;
/* number of pkts received from KNI, and sent to NIC */
uint64_t tx_packets;
/* number of pkts received from KNI, but failed to send to NIC */
uint64_t tx_dropped;
};
/* kni device statistics array */
static struct kni_interface_stats kni_stats[RTE_MAX_ETHPORTS];
static int kni_change_mtu(uint8_t port_id, unsigned new_mtu);
static int kni_config_network_interface(uint8_t port_id, uint8_t if_up);
static rte_atomic32_t kni_stop = RTE_ATOMIC32_INIT(0);
/* Print out statistics on packets handled */
static void
print_stats(void)
{
uint8_t i;
printf("\n**KNI example application statistics**\n"
"====== ============== ============ ============ ============ ============\n"
" Port Lcore(RX/TX) rx_packets rx_dropped tx_packets tx_dropped\n"
"------ -------------- ------------ ------------ ------------ ------------\n");
for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
if (!kni_port_params_array[i])
continue;
printf("%7d %10u/%2u %13"PRIu64" %13"PRIu64" %13"PRIu64" "
"%13"PRIu64"\n", i,
kni_port_params_array[i]->lcore_rx,
kni_port_params_array[i]->lcore_tx,
kni_stats[i].rx_packets,
kni_stats[i].rx_dropped,
kni_stats[i].tx_packets,
kni_stats[i].tx_dropped);
}
printf("====== ============== ============ ============ ============ ============\n");
}
/* Custom handling of signals to handle stats and kni processing */
static void
signal_handler(int signum)
{
/* When we receive a USR1 signal, print stats */
if (signum == SIGUSR1) {
print_stats();
}
/* When we receive a USR2 signal, reset stats */
if (signum == SIGUSR2) {
memset(&kni_stats, 0, sizeof(kni_stats));
printf("\n**Statistics have been reset**\n");
return;
}
/* When we receive a RTMIN or SIGINT signal, stop kni processing */
if (signum == SIGRTMIN || signum == SIGINT){
printf("SIGRTMIN is received, and the KNI processing is "
"going to stop\n");
rte_atomic32_inc(&kni_stop);
return;
}
}
static void
kni_burst_free_mbufs(struct rte_mbuf **pkts, unsigned num)
{
unsigned i;
if (pkts == NULL)
return;
for (i = 0; i < num; i++) {
rte_pktmbuf_free(pkts[i]);
pkts[i] = NULL;
}
}
static void
kni_ingress(struct kni_port_params *p)
{
uint8_t i, port_id;
unsigned nb_rx, num;
uint32_t nb_kni;
struct rte_mbuf *pkts_burst[PKT_BURST_SZ];
if (p == NULL)
return;
nb_kni = p->nb_kni;
port_id = p->port_id;
for (i = 0; i < nb_kni; i++) {
/* Burst rx from eth */
nb_rx = rte_eth_rx_burst(port_id, 0, pkts_burst, PKT_BURST_SZ);
if (unlikely(nb_rx > PKT_BURST_SZ)) {
RTE_LOG(ERR, APP, "Error receiving from eth\n");
return;
}
/* Burst tx to kni */
num = rte_kni_tx_burst(p->kni[i], pkts_burst, nb_rx);
kni_stats[port_id].rx_packets += num;
rte_kni_handle_request(p->kni[i]);
if (unlikely(num < nb_rx)) {
/* Free mbufs not tx to kni interface */
kni_burst_free_mbufs(&pkts_burst[num], nb_rx - num);
kni_stats[port_id].rx_dropped += nb_rx - num;
}
}
}
static void
kni_egress(struct kni_port_params *p)
{
uint8_t i, port_id;
unsigned nb_tx, num;
uint32_t nb_kni;
struct rte_mbuf *pkts_burst[PKT_BURST_SZ];
if (p == NULL)
return;
nb_kni = p->nb_kni;
port_id = p->port_id;
for (i = 0; i < nb_kni; i++) {
/* Burst rx from kni */
num = rte_kni_rx_burst(p->kni[i], pkts_burst, PKT_BURST_SZ);
if (unlikely(num > PKT_BURST_SZ)) {
RTE_LOG(ERR, APP, "Error receiving from KNI\n");
return;
}
/* Burst tx to eth */
nb_tx = rte_eth_tx_burst(port_id, 0, pkts_burst, (uint16_t)num);
kni_stats[port_id].tx_packets += nb_tx;
if (unlikely(nb_tx < num)) {
/* Free mbufs not tx to NIC */
kni_burst_free_mbufs(&pkts_burst[nb_tx], num - nb_tx);
kni_stats[port_id].tx_dropped += num - nb_tx;
}
}
}
static int
main_loop(__rte_unused void *arg)
{
uint8_t i, nb_ports = rte_eth_dev_count();
int32_t f_stop;
const unsigned lcore_id = rte_lcore_id();
enum lcore_rxtx {
LCORE_NONE,
LCORE_RX,
LCORE_TX,
LCORE_MAX
};
enum lcore_rxtx flag = LCORE_NONE;
for (i = 0; i < nb_ports; i++) {
if (!kni_port_params_array[i])
continue;
if (kni_port_params_array[i]->lcore_rx == (uint8_t)lcore_id) {
flag = LCORE_RX;
break;
} else if (kni_port_params_array[i]->lcore_tx ==
(uint8_t)lcore_id) {
flag = LCORE_TX;
break;
}
}
if (flag == LCORE_RX) {
RTE_LOG(INFO, APP, "Lcore %u is reading from port %d\n",
kni_port_params_array[i]->lcore_rx,
kni_port_params_array[i]->port_id);
while (1) {
f_stop = rte_atomic32_read(&kni_stop);
if (f_stop)
break;
kni_ingress(kni_port_params_array[i]);
}
} else if (flag == LCORE_TX) {
RTE_LOG(INFO, APP, "Lcore %u is writing to port %d\n",
kni_port_params_array[i]->lcore_tx,
kni_port_params_array[i]->port_id);
while (1) {
f_stop = rte_atomic32_read(&kni_stop);
if (f_stop)
break;
kni_egress(kni_port_params_array[i]);
}
} else
RTE_LOG(INFO, APP, "Lcore %u has nothing to do\n", lcore_id);
return 0;
}
/* Display usage instructions */
static void
print_usage(const char *prgname)
{
RTE_LOG(INFO, APP, "\nUsage: %s [EAL options] -- -p PORTMASK -P "
"[--config (port,lcore_rx,lcore_tx,lcore_kthread...)"
"[,(port,lcore_rx,lcore_tx,lcore_kthread...)]]\n"
" -p PORTMASK: hex bitmask of ports to use\n"
" -P : enable promiscuous mode\n"
" --config (port,lcore_rx,lcore_tx,lcore_kthread...): "
"port and lcore configurations\n",
prgname);
}
/* Convert string to unsigned number. 0 is returned if error occurs */
static uint32_t
parse_unsigned(const char *portmask)
{
char *end = NULL;
unsigned long num;
num = strtoul(portmask, &end, 16);
if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
return 0;
return (uint32_t)num;
}
static void
print_config(void)
{
uint32_t i, j;
struct kni_port_params **p = kni_port_params_array;
for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
if (!p[i])
continue;
RTE_LOG(DEBUG, APP, "Port ID: %d\n", p[i]->port_id);
RTE_LOG(DEBUG, APP, "Rx lcore ID: %u, Tx lcore ID: %u\n",
p[i]->lcore_rx, p[i]->lcore_tx);
for (j = 0; j < p[i]->nb_lcore_k; j++)
RTE_LOG(DEBUG, APP, "Kernel thread lcore ID: %u\n",
p[i]->lcore_k[j]);
}
}
static int
parse_config(const char *arg)
{
const char *p, *p0 = arg;
char s[256], *end;
unsigned size;
enum fieldnames {
FLD_PORT = 0,
FLD_LCORE_RX,
FLD_LCORE_TX,
_NUM_FLD = KNI_MAX_KTHREAD + 3,
};
int i, j, nb_token;
char *str_fld[_NUM_FLD];
unsigned long int_fld[_NUM_FLD];
uint8_t port_id, nb_kni_port_params = 0;
memset(&kni_port_params_array, 0, sizeof(kni_port_params_array));
while (((p = strchr(p0, '(')) != NULL) &&
nb_kni_port_params < RTE_MAX_ETHPORTS) {
p++;
if ((p0 = strchr(p, ')')) == NULL)
goto fail;
size = p0 - p;
if (size >= sizeof(s)) {
printf("Invalid config parameters\n");
goto fail;
}
snprintf(s, sizeof(s), "%.*s", size, p);
nb_token = rte_strsplit(s, sizeof(s), str_fld, _NUM_FLD, ',');
if (nb_token <= FLD_LCORE_TX) {
printf("Invalid config parameters\n");
goto fail;
}
for (i = 0; i < nb_token; i++) {
errno = 0;
int_fld[i] = strtoul(str_fld[i], &end, 0);
if (errno != 0 || end == str_fld[i]) {
printf("Invalid config parameters\n");
goto fail;
}
}
i = 0;
port_id = (uint8_t)int_fld[i++];
if (port_id >= RTE_MAX_ETHPORTS) {
printf("Port ID %d could not exceed the maximum %d\n",
port_id, RTE_MAX_ETHPORTS);
goto fail;
}
if (kni_port_params_array[port_id]) {
printf("Port %d has been configured\n", port_id);
goto fail;
}
kni_port_params_array[port_id] =
rte_zmalloc("KNI_port_params",
sizeof(struct kni_port_params), RTE_CACHE_LINE_SIZE);
kni_port_params_array[port_id]->port_id = port_id;
kni_port_params_array[port_id]->lcore_rx =
(uint8_t)int_fld[i++];
kni_port_params_array[port_id]->lcore_tx =
(uint8_t)int_fld[i++];
if (kni_port_params_array[port_id]->lcore_rx >= RTE_MAX_LCORE ||
kni_port_params_array[port_id]->lcore_tx >= RTE_MAX_LCORE) {
printf("lcore_rx %u or lcore_tx %u ID could not "
"exceed the maximum %u\n",
kni_port_params_array[port_id]->lcore_rx,
kni_port_params_array[port_id]->lcore_tx,
(unsigned)RTE_MAX_LCORE);
goto fail;
}
for (j = 0; i < nb_token && j < KNI_MAX_KTHREAD; i++, j++)
kni_port_params_array[port_id]->lcore_k[j] =
(uint8_t)int_fld[i];
kni_port_params_array[port_id]->nb_lcore_k = j;
}
print_config();
return 0;
fail:
for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
if (kni_port_params_array[i]) {
rte_free(kni_port_params_array[i]);
kni_port_params_array[i] = NULL;
}
}
return -1;
}
static int
validate_parameters(uint32_t portmask)
{
uint32_t i;
if (!portmask) {
printf("No port configured in port mask\n");
return -1;
}
for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
if (((portmask & (1 << i)) && !kni_port_params_array[i]) ||
(!(portmask & (1 << i)) && kni_port_params_array[i]))
rte_exit(EXIT_FAILURE, "portmask is not consistent "
"to port ids specified in --config\n");
if (kni_port_params_array[i] && !rte_lcore_is_enabled(\
(unsigned)(kni_port_params_array[i]->lcore_rx)))
rte_exit(EXIT_FAILURE, "lcore id %u for "
"port %d receiving not enabled\n",
kni_port_params_array[i]->lcore_rx,
kni_port_params_array[i]->port_id);
if (kni_port_params_array[i] && !rte_lcore_is_enabled(\
(unsigned)(kni_port_params_array[i]->lcore_tx)))
rte_exit(EXIT_FAILURE, "lcore id %u for "
"port %d transmitting not enabled\n",
kni_port_params_array[i]->lcore_tx,
kni_port_params_array[i]->port_id);
}
return 0;
}
#define CMDLINE_OPT_CONFIG "config"
/* Parse the arguments given in the command line of the application */
static int
parse_args(int argc, char **argv)
{
int opt, longindex, ret = 0;
const char *prgname = argv[0];
static struct option longopts[] = {
{CMDLINE_OPT_CONFIG, required_argument, NULL, 0},
{NULL, 0, NULL, 0}
};
/* Disable printing messages within getopt() */
opterr = 0;
/* Parse command line */
while ((opt = getopt_long(argc, argv, "p:P", longopts,
&longindex)) != EOF) {
switch (opt) {
case 'p':
ports_mask = parse_unsigned(optarg);
break;
case 'P':
promiscuous_on = 1;
break;
case 0:
if (!strncmp(longopts[longindex].name,
CMDLINE_OPT_CONFIG,
sizeof(CMDLINE_OPT_CONFIG))) {
ret = parse_config(optarg);
if (ret) {
printf("Invalid config\n");
print_usage(prgname);
return -1;
}
}
break;
default:
print_usage(prgname);
rte_exit(EXIT_FAILURE, "Invalid option specified\n");
}
}
/* Check that options were parsed ok */
if (validate_parameters(ports_mask) < 0) {
print_usage(prgname);
rte_exit(EXIT_FAILURE, "Invalid parameters\n");
}
return ret;
}
/* Initialize KNI subsystem */
static void
init_kni(void)
{
unsigned int num_of_kni_ports = 0, i;
struct kni_port_params **params = kni_port_params_array;
/* Calculate the maximum number of KNI interfaces that will be used */
for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
if (kni_port_params_array[i]) {
num_of_kni_ports += (params[i]->nb_lcore_k ?
params[i]->nb_lcore_k : 1);
}
}
/* Invoke rte KNI init to preallocate the ports */
rte_kni_init(num_of_kni_ports);
}
/* Initialise a single port on an Ethernet device */
static void
init_port(uint8_t port)
{
int ret;
/* Initialise device and RX/TX queues */
RTE_LOG(INFO, APP, "Initialising port %u ...\n", (unsigned)port);
fflush(stdout);
ret = rte_eth_dev_configure(port, 1, 1, &port_conf);
if (ret < 0)
rte_exit(EXIT_FAILURE, "Could not configure port%u (%d)\n",
(unsigned)port, ret);
ret = rte_eth_rx_queue_setup(port, 0, NB_RXD,
rte_eth_dev_socket_id(port), NULL, pktmbuf_pool);
if (ret < 0)
rte_exit(EXIT_FAILURE, "Could not setup up RX queue for "
"port%u (%d)\n", (unsigned)port, ret);
ret = rte_eth_tx_queue_setup(port, 0, NB_TXD,
rte_eth_dev_socket_id(port), NULL);
if (ret < 0)
rte_exit(EXIT_FAILURE, "Could not setup up TX queue for "
"port%u (%d)\n", (unsigned)port, ret);
ret = rte_eth_dev_start(port);
if (ret < 0)
rte_exit(EXIT_FAILURE, "Could not start port%u (%d)\n",
(unsigned)port, ret);
if (promiscuous_on)
rte_eth_promiscuous_enable(port);
}
/* Check the link status of all ports in up to 9s, and print them finally */
static void
check_all_ports_link_status(uint8_t port_num, uint32_t port_mask)
{
#define CHECK_INTERVAL 100 /* 100ms */
#define MAX_CHECK_TIME 90 /* 9s (90 * 100ms) in total */
uint8_t portid, count, all_ports_up, print_flag = 0;
struct rte_eth_link link;
printf("\nChecking link status\n");
fflush(stdout);
for (count = 0; count <= MAX_CHECK_TIME; count++) {
all_ports_up = 1;
for (portid = 0; portid < port_num; portid++) {
if ((port_mask & (1 << portid)) == 0)
continue;
memset(&link, 0, sizeof(link));
rte_eth_link_get_nowait(portid, &link);
/* print link status if flag set */
if (print_flag == 1) {
if (link.link_status)
printf("Port %d Link Up - speed %u "
"Mbps - %s\n", (uint8_t)portid,
(unsigned)link.link_speed,
(link.link_duplex == ETH_LINK_FULL_DUPLEX) ?
("full-duplex") : ("half-duplex\n"));
else
printf("Port %d Link Down\n",
(uint8_t)portid);
continue;
}
/* clear all_ports_up flag if any link down */
if (link.link_status == ETH_LINK_DOWN) {
all_ports_up = 0;
break;
}
}
/* after finally printing all link status, get out */
if (print_flag == 1)
break;
if (all_ports_up == 0) {
printf(".");
fflush(stdout);
rte_delay_ms(CHECK_INTERVAL);
}
/* set the print_flag if all ports up or timeout */
if (all_ports_up == 1 || count == (MAX_CHECK_TIME - 1)) {
print_flag = 1;
printf("done\n");
}
}
}
/* Callback for request of changing MTU */
static int
kni_change_mtu(uint8_t port_id, unsigned new_mtu)
{
int ret;
struct rte_eth_conf conf;
if (port_id >= rte_eth_dev_count()) {
RTE_LOG(ERR, APP, "Invalid port id %d\n", port_id);
return -EINVAL;
}
RTE_LOG(INFO, APP, "Change MTU of port %d to %u\n", port_id, new_mtu);
/* Stop specific port */
rte_eth_dev_stop(port_id);
memcpy(&conf, &port_conf, sizeof(conf));
/* Set new MTU */
if (new_mtu > ETHER_MAX_LEN)
conf.rxmode.jumbo_frame = 1;
else
conf.rxmode.jumbo_frame = 0;
/* mtu + length of header + length of FCS = max pkt length */
conf.rxmode.max_rx_pkt_len = new_mtu + KNI_ENET_HEADER_SIZE +
KNI_ENET_FCS_SIZE;
ret = rte_eth_dev_configure(port_id, 1, 1, &conf);
if (ret < 0) {
RTE_LOG(ERR, APP, "Fail to reconfigure port %d\n", port_id);
return ret;
}
/* Restart specific port */
ret = rte_eth_dev_start(port_id);
if (ret < 0) {
RTE_LOG(ERR, APP, "Fail to restart port %d\n", port_id);
return ret;
}
return 0;
}
/* Callback for request of configuring network interface up/down */
static int
kni_config_network_interface(uint8_t port_id, uint8_t if_up)
{
int ret = 0;
if (port_id >= rte_eth_dev_count() || port_id >= RTE_MAX_ETHPORTS) {
RTE_LOG(ERR, APP, "Invalid port id %d\n", port_id);
return -EINVAL;
}
RTE_LOG(INFO, APP, "Configure network interface of %d %s\n",
port_id, if_up ? "up" : "down");
if (if_up != 0) { /* Configure network interface up */
rte_eth_dev_stop(port_id);
ret = rte_eth_dev_start(port_id);
} else /* Configure network interface down */
rte_eth_dev_stop(port_id);
if (ret < 0)
RTE_LOG(ERR, APP, "Failed to start port %d\n", port_id);
return ret;
}
static int
kni_alloc(uint8_t port_id)
{
uint8_t i;
struct rte_kni *kni;
struct rte_kni_conf conf;
struct kni_port_params **params = kni_port_params_array;
if (port_id >= RTE_MAX_ETHPORTS || !params[port_id])
return -1;
params[port_id]->nb_kni = params[port_id]->nb_lcore_k ?
params[port_id]->nb_lcore_k : 1;
for (i = 0; i < params[port_id]->nb_kni; i++) {
/* Clear conf at first */
memset(&conf, 0, sizeof(conf));
if (params[port_id]->nb_lcore_k) {
snprintf(conf.name, RTE_KNI_NAMESIZE,
"vEth%u_%u", port_id, i);
conf.core_id = params[port_id]->lcore_k[i];
conf.force_bind = 1;
} else
snprintf(conf.name, RTE_KNI_NAMESIZE,
"vEth%u", port_id);
conf.group_id = (uint16_t)port_id;
conf.mbuf_size = MAX_PACKET_SZ;
/*
* The first KNI device associated to a port
* is the master, for multiple kernel thread
* environment.
*/
if (i == 0) {
struct rte_kni_ops ops;
struct rte_eth_dev_info dev_info;
memset(&dev_info, 0, sizeof(dev_info));
rte_eth_dev_info_get(port_id, &dev_info);
conf.addr = dev_info.pci_dev->addr;
conf.id = dev_info.pci_dev->id;
memset(&ops, 0, sizeof(ops));
ops.port_id = port_id;
ops.change_mtu = kni_change_mtu;
ops.config_network_if = kni_config_network_interface;
kni = rte_kni_alloc(pktmbuf_pool, &conf, &ops);
} else
kni = rte_kni_alloc(pktmbuf_pool, &conf, NULL);
if (!kni)
rte_exit(EXIT_FAILURE, "Fail to create kni for "
"port: %d\n", port_id);
params[port_id]->kni[i] = kni;
}
return 0;
}
static int
kni_free_kni(uint8_t port_id)
{
uint8_t i;
struct kni_port_params **p = kni_port_params_array;
if (port_id >= RTE_MAX_ETHPORTS || !p[port_id])
return -1;
for (i = 0; i < p[port_id]->nb_kni; i++) {
if (rte_kni_release(p[port_id]->kni[i]))
printf("Fail to release kni\n");
p[port_id]->kni[i] = NULL;
}
rte_eth_dev_stop(port_id);
return 0;
}
/* Initialise ports/queues etc. and start main loop on each core */
int
main(int argc, char** argv)
{
int ret;
uint8_t nb_sys_ports, port;
unsigned i;
/* Associate signal_hanlder function with USR signals */
signal(SIGUSR1, signal_handler);
signal(SIGUSR2, signal_handler);
signal(SIGRTMIN, signal_handler);
signal(SIGINT, signal_handler);
/* Initialise EAL */
ret = rte_eal_init(argc, argv);
if (ret < 0)
rte_exit(EXIT_FAILURE, "Could not initialise EAL (%d)\n", ret);
argc -= ret;
argv += ret;
/* Parse application arguments (after the EAL ones) */
ret = parse_args(argc, argv);
if (ret < 0)
rte_exit(EXIT_FAILURE, "Could not parse input parameters\n");
/* Create the mbuf pool */
pktmbuf_pool = rte_pktmbuf_pool_create("mbuf_pool", NB_MBUF,
MEMPOOL_CACHE_SZ, 0, MBUF_DATA_SZ, rte_socket_id());
if (pktmbuf_pool == NULL) {
rte_exit(EXIT_FAILURE, "Could not initialise mbuf pool\n");
return -1;
}
/* Get number of ports found in scan */
nb_sys_ports = rte_eth_dev_count();
if (nb_sys_ports == 0)
rte_exit(EXIT_FAILURE, "No supported Ethernet device found\n");
/* Check if the configured port ID is valid */
for (i = 0; i < RTE_MAX_ETHPORTS; i++)
if (kni_port_params_array[i] && i >= nb_sys_ports)
rte_exit(EXIT_FAILURE, "Configured invalid "
"port ID %u\n", i);
/* Initialize KNI subsystem */
init_kni();
/* Initialise each port */
for (port = 0; port < nb_sys_ports; port++) {
/* Skip ports that are not enabled */
if (!(ports_mask & (1 << port)))
continue;
init_port(port);
if (port >= RTE_MAX_ETHPORTS)
rte_exit(EXIT_FAILURE, "Can not use more than "
"%d ports for kni\n", RTE_MAX_ETHPORTS);
kni_alloc(port);
}
check_all_ports_link_status(nb_sys_ports, ports_mask);
/* Launch per-lcore function on every lcore */
rte_eal_mp_remote_launch(main_loop, NULL, CALL_MASTER);
RTE_LCORE_FOREACH_SLAVE(i) {
if (rte_eal_wait_lcore(i) < 0)
return -1;
}
/* Release resources */
for (port = 0; port < nb_sys_ports; port++) {
if (!(ports_mask & (1 << port)))
continue;
kni_free_kni(port);
}
#ifdef RTE_LIBRTE_XEN_DOM0
rte_kni_close();
#endif
for (i = 0; i < RTE_MAX_ETHPORTS; i++)
if (kni_port_params_array[i]) {
rte_free(kni_port_params_array[i]);
kni_port_params_array[i] = NULL;
}
return 0;
}
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