+++ /dev/null
-.. SPDX-License-Identifier: BSD-3-Clause
- Copyright(c) 2010-2014 Intel Corporation.
-
-Exception Path Sample Application
-=================================
-
-The Exception Path sample application is a simple example that demonstrates the use of the DPDK
-to set up an exception path for packets to go through the Linux* kernel.
-This is done by using virtual TAP network interfaces.
-These can be read from and written to by the DPDK application and
-appear to the kernel as a standard network interface.
-
-Overview
---------
-
-The application creates two threads for each NIC port being used.
-One thread reads from the port and writes the data unmodified to a thread-specific TAP interface.
-The second thread reads from a TAP interface and writes the data unmodified to the NIC port.
-
-The packet flow through the exception path application is as shown in the following figure.
-
-.. _figure_exception_path_example:
-
-.. figure:: img/exception_path_example.*
-
- Packet Flow
-
-
-To make throughput measurements, kernel bridges must be setup to forward data between the bridges appropriately.
-
-Compiling the Application
--------------------------
-
-To compile the sample application see :doc:`compiling`.
-
-The application is located in the ``exception_path`` sub-directory.
-
-Running the Application
------------------------
-
-The application requires a number of command line options:
-
-.. code-block:: console
-
- .build/exception_path [EAL options] -- -p PORTMASK -i IN_CORES -o OUT_CORES
-
-where:
-
-* -p PORTMASK: A hex bitmask of ports to use
-
-* -i IN_CORES: A hex bitmask of cores which read from NIC
-
-* -o OUT_CORES: A hex bitmask of cores which write to NIC
-
-Refer to the *DPDK Getting Started Guide* for general information on running applications
-and the Environment Abstraction Layer (EAL) options.
-
-The number of bits set in each bitmask must be the same.
-The coremask -c or the corelist -l parameter of the EAL options should include IN_CORES and OUT_CORES.
-The same bit must not be set in IN_CORES and OUT_CORES.
-The affinities between ports and cores are set beginning with the least significant bit of each mask, that is,
-the port represented by the lowest bit in PORTMASK is read from by the core represented by the lowest bit in IN_CORES,
-and written to by the core represented by the lowest bit in OUT_CORES.
-
-For example to run the application with two ports and four cores:
-
-.. code-block:: console
-
- ./build/exception_path -l 0-3 -n 4 -- -p 3 -i 3 -o c
-
-Getting Statistics
-~~~~~~~~~~~~~~~~~~
-
-While the application is running, statistics on packets sent and
-received can be displayed by sending the SIGUSR1 signal to the application from another terminal:
-
-.. code-block:: console
-
- killall -USR1 exception_path
-
-The statistics can be reset by sending a SIGUSR2 signal in a similar way.
-
-Explanation
------------
-
-The following sections provide some explanation of the code.
-
-Initialization
-~~~~~~~~~~~~~~
-
-Setup of the mbuf pool, driver and queues is similar to the setup done in the :ref:`l2_fwd_app_real_and_virtual`.
-In addition, the TAP interfaces must also be created.
-A TAP interface is created for each lcore that is being used.
-The code for creating the TAP interface is as follows:
-
-.. code-block:: c
-
- /*
- * Create a tap network interface, or use existing one with same name.
- * If name[0]='\0' then a name is automatically assigned and returned in name.
- */
-
- static int tap_create(char *name)
- {
- struct ifreq ifr;
- int fd, ret;
-
- fd = open("/dev/net/tun", O_RDWR);
- if (fd < 0)
- return fd;
-
- memset(&ifr, 0, sizeof(ifr));
-
- /* TAP device without packet information */
-
- ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
- if (name && *name)
- rte_snprinf(ifr.ifr_name, IFNAMSIZ, name);
-
- ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
-
- if (ret < 0) {
- close(fd);
- return ret;
-
- }
-
- if (name)
- snprintf(name, IFNAMSIZ, ifr.ifr_name);
-
- return fd;
- }
-
-The other step in the initialization process that is unique to this sample application
-is the association of each port with two cores:
-
-* One core to read from the port and write to a TAP interface
-
-* A second core to read from a TAP interface and write to the port
-
-This is done using an array called port_ids[], which is indexed by the lcore IDs.
-The population of this array is shown below:
-
-.. code-block:: c
-
- tx_port = 0;
- rx_port = 0;
-
- RTE_LCORE_FOREACH(i) {
- if (input_cores_mask & (1ULL << i)) {
- /* Skip ports that are not enabled */
- while ((ports_mask & (1 << rx_port)) == 0) {
- rx_port++;
- if (rx_port > (sizeof(ports_mask) * 8))
- goto fail; /* not enough ports */
- }
- port_ids[i] = rx_port++;
- } else if (output_cores_mask & (1ULL << i)) {
- /* Skip ports that are not enabled */
- while ((ports_mask & (1 << tx_port)) == 0) {
- tx_port++;
- if (tx_port > (sizeof(ports_mask) * 8))
- goto fail; /* not enough ports */
- }
- port_ids[i] = tx_port++;
- }
- }
-
-Packet Forwarding
-~~~~~~~~~~~~~~~~~
-
-After the initialization steps are complete, the main_loop() function is run on each lcore.
-This function first checks the lcore_id against the user provided input_cores_mask and output_cores_mask to see
-if this core is reading from or writing to a TAP interface.
-
-For the case that reads from a NIC port, the packet reception is the same as in the L2 Forwarding sample application
-(see :ref:`l2_fwd_app_rx_tx_packets`).
-The packet transmission is done by calling write() with the file descriptor of the appropriate TAP interface
-and then explicitly freeing the mbuf back to the pool.
-
-.. code-block:: c
-
- /* Loop forever reading from NIC and writing to tap */
-
- for (;;) {
- struct rte_mbuf *pkts_burst[PKT_BURST_SZ];
- unsigned i;
-
- const unsigned nb_rx = rte_eth_rx_burst(port_ids[lcore_id], 0, pkts_burst, PKT_BURST_SZ);
-
- lcore_stats[lcore_id].rx += nb_rx;
-
- for (i = 0; likely(i < nb_rx); i++) {
- struct rte_mbuf *m = pkts_burst[i];
- int ret = write(tap_fd, rte_pktmbuf_mtod(m, void*),
-
- rte_pktmbuf_data_len(m));
- rte_pktmbuf_free(m);
- if (unlikely(ret<0))
- lcore_stats[lcore_id].dropped++;
- else
- lcore_stats[lcore_id].tx++;
- }
- }
-
-For the other case that reads from a TAP interface and writes to a NIC port,
-packets are retrieved by doing a read() from the file descriptor of the appropriate TAP interface.
-This fills in the data into the mbuf, then other fields are set manually.
-The packet can then be transmitted as normal.
-
-.. code-block:: c
-
- /* Loop forever reading from tap and writing to NIC */
-
- for (;;) {
- int ret;
- struct rte_mbuf *m = rte_pktmbuf_alloc(pktmbuf_pool);
-
- if (m == NULL)
- continue;
-
- ret = read(tap_fd, m->pkt.data, MAX_PACKET_SZ); lcore_stats[lcore_id].rx++;
- if (unlikely(ret < 0)) {
- FATAL_ERROR("Reading from %s interface failed", tap_name);
- }
-
- m->pkt.nb_segs = 1;
- m->pkt.next = NULL;
- m->pkt.data_len = (uint16_t)ret;
-
- ret = rte_eth_tx_burst(port_ids[lcore_id], 0, &m, 1);
- if (unlikely(ret < 1)) {
- rte_pktmuf_free(m);
- lcore_stats[lcore_id].dropped++;
- }
- else {
- lcore_stats[lcore_id].tx++;
- }
- }
-
-To set up loops for measuring throughput, TAP interfaces can be connected using bridging.
-The steps to do this are described in the section that follows.
-
-Managing TAP Interfaces and Bridges
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-The Exception Path sample application creates TAP interfaces with names of the format tap_dpdk_nn,
-where nn is the lcore ID. These TAP interfaces need to be configured for use:
-
-.. code-block:: console
-
- ifconfig tap_dpdk_00 up
-
-To set up a bridge between two interfaces so that packets sent to one interface can be read from another,
-use the brctl tool:
-
-.. code-block:: console
-
- brctl addbr "br0"
- brctl addif br0 tap_dpdk_00
- brctl addif br0 tap_dpdk_03
- ifconfig br0 up
-
-The TAP interfaces created by this application exist only when the application is running,
-so the steps above need to be repeated each time the application is run.
-To avoid this, persistent TAP interfaces can be created using openvpn:
-
-.. code-block:: console
-
- openvpn --mktun --dev tap_dpdk_00
-
-If this method is used, then the steps above have to be done only once and
-the same TAP interfaces can be reused each time the application is run.
-To remove bridges and persistent TAP interfaces, the following commands are used:
-
-.. code-block:: console
-
- ifconfig br0 down
- brctl delbr br0
- openvpn --rmtun --dev tap_dpdk_00
-
+++ /dev/null
-/* SPDX-License-Identifier: BSD-3-Clause
- * Copyright(c) 2010-2014 Intel Corporation
- */
-
-#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 <net/if.h>
-#ifdef RTE_EXEC_ENV_LINUX
-#include <linux/if_tun.h>
-#endif
-#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_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_debug.h>
-#include <rte_ether.h>
-#include <rte_ethdev.h>
-#include <rte_mempool.h>
-#include <rte_mbuf.h>
-#include <rte_string_fns.h>
-#include <rte_cycles.h>
-
-#ifndef APP_MAX_LCORE
-#if (RTE_MAX_LCORE > 64)
-#define APP_MAX_LCORE 64
-#else
-#define APP_MAX_LCORE RTE_MAX_LCORE
-#endif
-#endif
-
-/* Macros for printing using RTE_LOG */
-#define RTE_LOGTYPE_APP RTE_LOGTYPE_USER1
-#define FATAL_ERROR(fmt, args...) rte_exit(EXIT_FAILURE, fmt "\n", ##args)
-#define PRINT_INFO(fmt, args...) RTE_LOG(INFO, APP, fmt "\n", ##args)
-
-/* Max ports than can be used (each port is associated with two lcores) */
-#define MAX_PORTS (APP_MAX_LCORE / 2)
-
-/* 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
-
-/* 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 1024
-
-/* Number of TX ring descriptors */
-#define NB_TXD 1024
-
-/*
- * RX and TX Prefetch, Host, and Write-back threshold values should be
- * carefully set for optimal performance. Consult the network
- * controller's datasheet and supporting DPDK documentation for guidance
- * on how these parameters should be set.
- */
-
-/* Options for configuring ethernet port */
-static struct rte_eth_conf port_conf = {
- .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;
-
-/* Mask of cores that read from NIC and write to tap */
-static uint64_t input_cores_mask = 0;
-
-/* Mask of cores that read from tap and write to NIC */
-static uint64_t output_cores_mask = 0;
-
-/* Array storing port_id that is associated with each lcore */
-static uint16_t port_ids[APP_MAX_LCORE];
-
-/* Structure type for recording lcore-specific stats */
-struct stats {
- uint64_t rx;
- uint64_t tx;
- uint64_t dropped;
-} __rte_cache_aligned;
-
-/* Array of lcore-specific stats */
-static struct stats lcore_stats[APP_MAX_LCORE];
-
-/* Print out statistics on packets handled */
-static void
-print_stats(void)
-{
- unsigned i;
-
- printf("\n**Exception-Path example application statistics**\n"
- "======= ====== ============ ============ ===============\n"
- " Lcore Port RX TX Dropped on TX\n"
- "------- ------ ------------ ------------ ---------------\n");
- RTE_LCORE_FOREACH(i) {
- /* limit ourselves to application supported cores only */
- if (i >= APP_MAX_LCORE)
- break;
- printf("%6u %7u %13"PRIu64" %13"PRIu64" %16"PRIu64"\n",
- i, (unsigned)port_ids[i],
- lcore_stats[i].rx, lcore_stats[i].tx,
- lcore_stats[i].dropped);
- }
- printf("======= ====== ============ ============ ===============\n");
-}
-
-/* Custom handling of signals to handle stats */
-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(&lcore_stats, 0, sizeof(lcore_stats));
- printf("\n**Statistics have been reset**\n");
- return;
- }
-}
-
-#ifdef RTE_EXEC_ENV_LINUX
-/*
- * Create a tap network interface, or use existing one with same name.
- * If name[0]='\0' then a name is automatically assigned and returned in name.
- */
-static int tap_create(char *name)
-{
- struct ifreq ifr;
- int fd, ret;
-
- fd = open("/dev/net/tun", O_RDWR);
- if (fd < 0)
- return fd;
-
- memset(&ifr, 0, sizeof(ifr));
-
- /* TAP device without packet information */
- ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
-
- if (name && *name)
- strlcpy(ifr.ifr_name, name, IFNAMSIZ);
-
- ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
- if (ret < 0) {
- close(fd);
- return ret;
- }
-
- if (name)
- strlcpy(name, ifr.ifr_name, IFNAMSIZ);
-
- return fd;
-}
-#else
-/*
- * Find a free tap network interface, or create a new one.
- * The name is automatically assigned and returned in name.
- */
-static int tap_create(char *name)
-{
- int i, fd = -1;
- char devname[PATH_MAX];
-
- for (i = 0; i < 255; i++) {
- snprintf(devname, sizeof(devname), "/dev/tap%d", i);
- fd = open(devname, O_RDWR);
- if (fd >= 0 || errno != EBUSY)
- break;
- }
-
- if (name)
- snprintf(name, IFNAMSIZ, "tap%d", i);
-
- return fd;
-}
-#endif
-
-/* Main processing loop */
-static int
-main_loop(__attribute__((unused)) void *arg)
-{
- const unsigned lcore_id = rte_lcore_id();
- char tap_name[IFNAMSIZ];
- int tap_fd;
-
- if ((1ULL << lcore_id) & input_cores_mask) {
- /* Create new tap interface */
- snprintf(tap_name, IFNAMSIZ, "tap_dpdk_%.2u", lcore_id);
- tap_fd = tap_create(tap_name);
- if (tap_fd < 0)
- FATAL_ERROR("Could not create tap interface \"%s\" (%d)",
- tap_name, tap_fd);
-
- PRINT_INFO("Lcore %u is reading from port %u and writing to %s",
- lcore_id, (unsigned)port_ids[lcore_id], tap_name);
- fflush(stdout);
- /* Loop forever reading from NIC and writing to tap */
- for (;;) {
- struct rte_mbuf *pkts_burst[PKT_BURST_SZ];
- unsigned i;
- const unsigned nb_rx =
- rte_eth_rx_burst(port_ids[lcore_id], 0,
- pkts_burst, PKT_BURST_SZ);
- lcore_stats[lcore_id].rx += nb_rx;
- for (i = 0; likely(i < nb_rx); i++) {
- struct rte_mbuf *m = pkts_burst[i];
- /* Ignore return val from write() */
- int ret = write(tap_fd,
- rte_pktmbuf_mtod(m, void*),
- rte_pktmbuf_data_len(m));
- rte_pktmbuf_free(m);
- if (unlikely(ret < 0))
- lcore_stats[lcore_id].dropped++;
- else
- lcore_stats[lcore_id].tx++;
- }
- }
- }
- else if ((1ULL << lcore_id) & output_cores_mask) {
- /* Create new tap interface */
- snprintf(tap_name, IFNAMSIZ, "tap_dpdk_%.2u", lcore_id);
- tap_fd = tap_create(tap_name);
- if (tap_fd < 0)
- FATAL_ERROR("Could not create tap interface \"%s\" (%d)",
- tap_name, tap_fd);
-
- PRINT_INFO("Lcore %u is reading from %s and writing to port %u",
- lcore_id, tap_name, (unsigned)port_ids[lcore_id]);
- fflush(stdout);
- /* Loop forever reading from tap and writing to NIC */
- for (;;) {
- int ret;
- struct rte_mbuf *m = rte_pktmbuf_alloc(pktmbuf_pool);
- if (m == NULL)
- continue;
-
- ret = read(tap_fd, rte_pktmbuf_mtod(m, void *),
- MAX_PACKET_SZ);
- lcore_stats[lcore_id].rx++;
- if (unlikely(ret < 0)) {
- FATAL_ERROR("Reading from %s interface failed",
- tap_name);
- }
- m->nb_segs = 1;
- m->next = NULL;
- m->pkt_len = (uint16_t)ret;
- m->data_len = (uint16_t)ret;
- ret = rte_eth_tx_burst(port_ids[lcore_id], 0, &m, 1);
- if (unlikely(ret < 1)) {
- rte_pktmbuf_free(m);
- lcore_stats[lcore_id].dropped++;
- }
- else {
- lcore_stats[lcore_id].tx++;
- }
- }
- }
- else {
- PRINT_INFO("Lcore %u has nothing to do", lcore_id);
- return 0;
- }
- /*
- * Tap file is closed automatically when program exits. Putting close()
- * here will cause the compiler to give an error about unreachable code.
- */
-}
-
-/* Display usage instructions */
-static void
-print_usage(const char *prgname)
-{
- PRINT_INFO("\nUsage: %s [EAL options] -- -p PORTMASK -i IN_CORES -o OUT_CORES\n"
- " -p PORTMASK: hex bitmask of ports to use\n"
- " -i IN_CORES: hex bitmask of cores which read from NIC\n"
- " -o OUT_CORES: hex bitmask of cores which write to NIC",
- prgname);
-}
-
-/* Convert string to unsigned number. 0 is returned if error occurs */
-static uint64_t
-parse_unsigned(const char *portmask)
-{
- char *end = NULL;
- uint64_t num;
-
- num = strtoull(portmask, &end, 16);
- if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
- return 0;
-
- return (uint64_t)num;
-}
-
-/* Record affinities between ports and lcores in global port_ids[] array */
-static void
-setup_port_lcore_affinities(void)
-{
- unsigned long i;
- uint16_t tx_port = 0;
- uint16_t rx_port = 0;
-
- /* Setup port_ids[] array, and check masks were ok */
- for (i = 0; i < APP_MAX_LCORE; i++) {
- if (!rte_lcore_is_enabled(i))
- continue;
- if (input_cores_mask & (1ULL << i)) {
- /* Skip ports that are not enabled */
- while ((ports_mask & (1 << rx_port)) == 0) {
- rx_port++;
- if (rx_port > (sizeof(ports_mask) * 8))
- goto fail; /* not enough ports */
- }
-
- port_ids[i] = rx_port++;
- } else if (output_cores_mask & (1ULL << (i & 0x3f))) {
- /* Skip ports that are not enabled */
- while ((ports_mask & (1 << tx_port)) == 0) {
- tx_port++;
- if (tx_port > (sizeof(ports_mask) * 8))
- goto fail; /* not enough ports */
- }
-
- port_ids[i] = tx_port++;
- }
- }
-
- if (rx_port != tx_port)
- goto fail; /* uneven number of cores in masks */
-
- if (ports_mask & (~((1 << rx_port) - 1)))
- goto fail; /* unused ports */
-
- return;
-fail:
- FATAL_ERROR("Invalid core/port masks specified on command line");
-}
-
-/* Parse the arguments given in the command line of the application */
-static void
-parse_args(int argc, char **argv)
-{
- int opt;
- const char *prgname = argv[0];
-
- /* Disable printing messages within getopt() */
- opterr = 0;
-
- /* Parse command line */
- while ((opt = getopt(argc, argv, "i:o:p:")) != EOF) {
- switch (opt) {
- case 'i':
- input_cores_mask = parse_unsigned(optarg);
- break;
- case 'o':
- output_cores_mask = parse_unsigned(optarg);
- break;
- case 'p':
- ports_mask = parse_unsigned(optarg);
- break;
- default:
- print_usage(prgname);
- FATAL_ERROR("Invalid option specified");
- }
- }
-
- /* Check that options were parsed ok */
- if (input_cores_mask == 0) {
- print_usage(prgname);
- FATAL_ERROR("IN_CORES not specified correctly");
- }
- if (output_cores_mask == 0) {
- print_usage(prgname);
- FATAL_ERROR("OUT_CORES not specified correctly");
- }
- if (ports_mask == 0) {
- print_usage(prgname);
- FATAL_ERROR("PORTMASK not specified correctly");
- }
-
- setup_port_lcore_affinities();
-}
-
-/* Initialise a single port on an Ethernet device */
-static void
-init_port(uint16_t port)
-{
- int ret;
- uint16_t nb_rxd = NB_RXD;
- uint16_t nb_txd = NB_TXD;
- struct rte_eth_dev_info dev_info;
- struct rte_eth_rxconf rxq_conf;
- struct rte_eth_txconf txq_conf;
- struct rte_eth_conf local_port_conf = port_conf;
-
- /* Initialise device and RX/TX queues */
- PRINT_INFO("Initialising port %u ...", port);
- fflush(stdout);
-
- ret = rte_eth_dev_info_get(port, &dev_info);
- if (ret != 0)
- FATAL_ERROR("Error during getting device (port %u) info: %s\n",
- port, strerror(-ret));
-
- if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE)
- local_port_conf.txmode.offloads |=
- DEV_TX_OFFLOAD_MBUF_FAST_FREE;
- ret = rte_eth_dev_configure(port, 1, 1, &local_port_conf);
- if (ret < 0)
- FATAL_ERROR("Could not configure port%u (%d)", port, ret);
-
- ret = rte_eth_dev_adjust_nb_rx_tx_desc(port, &nb_rxd, &nb_txd);
- if (ret < 0)
- FATAL_ERROR("Could not adjust number of descriptors for port%u (%d)",
- port, ret);
-
- rxq_conf = dev_info.default_rxconf;
- rxq_conf.offloads = local_port_conf.rxmode.offloads;
- ret = rte_eth_rx_queue_setup(port, 0, nb_rxd,
- rte_eth_dev_socket_id(port),
- &rxq_conf,
- pktmbuf_pool);
- if (ret < 0)
- FATAL_ERROR("Could not setup up RX queue for port%u (%d)",
- port, ret);
-
- txq_conf = dev_info.default_txconf;
- txq_conf.offloads = local_port_conf.txmode.offloads;
- ret = rte_eth_tx_queue_setup(port, 0, nb_txd,
- rte_eth_dev_socket_id(port),
- &txq_conf);
- if (ret < 0)
- FATAL_ERROR("Could not setup up TX queue for port%u (%d)",
- port, ret);
-
- ret = rte_eth_dev_start(port);
- if (ret < 0)
- FATAL_ERROR("Could not start port%u (%d)", port, ret);
-
- ret = rte_eth_promiscuous_enable(port);
- if (ret != 0)
- FATAL_ERROR("Could not enable promiscuous mode for port%u (%s)",
- port, rte_strerror(-ret));
-}
-
-/* Check the link status of all ports in up to 9s, and print them finally */
-static void
-check_all_ports_link_status(uint32_t port_mask)
-{
-#define CHECK_INTERVAL 100 /* 100ms */
-#define MAX_CHECK_TIME 90 /* 9s (90 * 100ms) in total */
- uint16_t portid;
- uint8_t count, all_ports_up, print_flag = 0;
- struct rte_eth_link link;
- int ret;
-
- printf("\nChecking link status");
- fflush(stdout);
- for (count = 0; count <= MAX_CHECK_TIME; count++) {
- all_ports_up = 1;
- RTE_ETH_FOREACH_DEV(portid) {
- if ((port_mask & (1 << portid)) == 0)
- continue;
- memset(&link, 0, sizeof(link));
- ret = rte_eth_link_get_nowait(portid, &link);
- if (ret < 0) {
- all_ports_up = 0;
- if (print_flag == 1)
- printf("Port %u link get failed: %s\n",
- portid, rte_strerror(-ret));
- continue;
- }
- /* print link status if flag set */
- if (print_flag == 1) {
- if (link.link_status)
- printf(
- "Port%d Link Up. Speed %u Mbps - %s\n",
- portid, link.link_speed,
- (link.link_duplex == ETH_LINK_FULL_DUPLEX) ?
- ("full-duplex") : ("half-duplex\n"));
- else
- printf("Port %d Link Down\n", 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");
- }
- }
-}
-
-/* Initialise ports/queues etc. and start main loop on each core */
-int
-main(int argc, char** argv)
-{
- int ret;
- unsigned i,high_port;
- uint16_t nb_sys_ports, port;
-
- /* Associate signal_hanlder function with USR signals */
- signal(SIGUSR1, signal_handler);
- signal(SIGUSR2, signal_handler);
-
- /* Initialise EAL */
- ret = rte_eal_init(argc, argv);
- if (ret < 0)
- FATAL_ERROR("Could not initialise EAL (%d)", ret);
- argc -= ret;
- argv += ret;
-
- /* Parse application arguments (after the EAL ones) */
- parse_args(argc, argv);
-
- /* 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) {
- FATAL_ERROR("Could not initialise mbuf pool");
- return -1;
- }
-
- /* Get number of ports found in scan */
- nb_sys_ports = rte_eth_dev_count_avail();
- if (nb_sys_ports == 0)
- FATAL_ERROR("No supported Ethernet device found");
- /* Find highest port set in portmask */
- for (high_port = (sizeof(ports_mask) * 8) - 1;
- (high_port != 0) && !(ports_mask & (1 << high_port));
- high_port--)
- ; /* empty body */
- if (high_port > nb_sys_ports)
- FATAL_ERROR("Port mask requires more ports than available");
-
- /* Initialise each port */
- RTE_ETH_FOREACH_DEV(port) {
- /* Skip ports that are not enabled */
- if ((ports_mask & (1 << port)) == 0) {
- continue;
- }
- init_port(port);
- }
- check_all_ports_link_status(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;
- }
-
- return 0;
-}
git.droids-corp.org / dpdk.git / commitdiff