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numam-dpdk/examples/tep_termination/main.c
Thomas Monjalon 1f49ec153c examples: remove useless debug flags 
The debug logs must be enabled at compile-time and run-time.
There are also some internal flags in some examples to enable the debug
logs of the applications. They are now enabled in debug configs and
can be disabled thanks to the more generic logtype mechanism:
	rte_set_log_type(RTE_LOGTYPE_USER1, 0);

Removing these #ifdef allows to test these code branches more easily
and avoid dead code pitfalls.

Signed-off-by: Thomas Monjalon <thomas.monjalon@6wind.com>
Acked-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
2016-05-02 15:31:17 +02:00

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/*-
* BSD LICENSE
*
* Copyright(c) 2010-2015 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 <arpa/inet.h>
#include <getopt.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include <linux/virtio_net.h>
#include <linux/virtio_ring.h>
#include <signal.h>
#include <stdint.h>
#include <sys/eventfd.h>
#include <sys/param.h>
#include <unistd.h>
#include <rte_atomic.h>
#include <rte_cycles.h>
#include <rte_ethdev.h>
#include <rte_log.h>
#include <rte_string_fns.h>
#include <rte_malloc.h>
#include <rte_virtio_net.h>
#include "main.h"
#include "vxlan.h"
#include "vxlan_setup.h"
/* the maximum number of external ports supported */
#define MAX_SUP_PORTS 1
/**
* Calculate the number of buffers needed per port
*/
#define NUM_MBUFS_PER_PORT ((MAX_QUEUES * RTE_TEST_RX_DESC_DEFAULT) +\
(nb_switching_cores * MAX_PKT_BURST) +\
(nb_switching_cores * \
RTE_TEST_TX_DESC_DEFAULT) +\
(nb_switching_cores * MBUF_CACHE_SIZE))
#define MBUF_CACHE_SIZE 128
#define MBUF_SIZE (2048 + sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM)
#define MAX_PKT_BURST 32 /* Max burst size for RX/TX */
#define BURST_TX_DRAIN_US 100 /* TX drain every ~100us */
/* Defines how long we wait between retries on RX */
#define BURST_RX_WAIT_US 15
#define BURST_RX_RETRIES 4 /* Number of retries on RX. */
#define JUMBO_FRAME_MAX_SIZE 0x2600
/* State of virtio device. */
#define DEVICE_MAC_LEARNING 0
#define DEVICE_RX 1
#define DEVICE_SAFE_REMOVE 2
/* Config_core_flag status definitions. */
#define REQUEST_DEV_REMOVAL 1
#define ACK_DEV_REMOVAL 0
/* Configurable number of RX/TX ring descriptors */
#define RTE_TEST_RX_DESC_DEFAULT 1024
#define RTE_TEST_TX_DESC_DEFAULT 512
/* Get first 4 bytes in mbuf headroom. */
#define MBUF_HEADROOM_UINT32(mbuf) (*(uint32_t *)((uint8_t *)(mbuf) \
+ sizeof(struct rte_mbuf)))
#define INVALID_PORT_ID 0xFF
/* Size of buffers used for snprintfs. */
#define MAX_PRINT_BUFF 6072
/* Maximum character device basename size. */
#define MAX_BASENAME_SZ 20
/* Maximum long option length for option parsing. */
#define MAX_LONG_OPT_SZ 64
/* Used to compare MAC addresses. */
#define MAC_ADDR_CMP 0xFFFFFFFFFFFFULL
#define CMD_LINE_OPT_NB_DEVICES "nb-devices"
#define CMD_LINE_OPT_UDP_PORT "udp-port"
#define CMD_LINE_OPT_TX_CHECKSUM "tx-checksum"
#define CMD_LINE_OPT_TSO_SEGSZ "tso-segsz"
#define CMD_LINE_OPT_FILTER_TYPE "filter-type"
#define CMD_LINE_OPT_ENCAP "encap"
#define CMD_LINE_OPT_DECAP "decap"
#define CMD_LINE_OPT_RX_RETRY "rx-retry"
#define CMD_LINE_OPT_RX_RETRY_DELAY "rx-retry-delay"
#define CMD_LINE_OPT_RX_RETRY_NUM "rx-retry-num"
#define CMD_LINE_OPT_STATS "stats"
#define CMD_LINE_OPT_DEV_BASENAME "dev-basename"
/* mask of enabled ports */
static uint32_t enabled_port_mask;
/*Number of switching cores enabled*/
static uint32_t nb_switching_cores;
/* number of devices/queues to support*/
uint16_t nb_devices = 2;
/* max ring descriptor, ixgbe, i40e, e1000 all are 4096. */
#define MAX_RING_DESC 4096
struct vpool {
struct rte_mempool *pool;
struct rte_ring *ring;
uint32_t buf_size;
} vpool_array[MAX_QUEUES+MAX_QUEUES];
/* UDP tunneling port */
uint16_t udp_port = 4789;
/* enable/disable inner TX checksum */
uint8_t tx_checksum = 0;
/* TCP segment size */
uint16_t tso_segsz = 0;
/* enable/disable decapsulation */
uint8_t rx_decap = 1;
/* enable/disable encapsulation */
uint8_t tx_encap = 1;
/* RX filter type for tunneling packet */
uint8_t filter_idx = 1;
/* overlay packet operation */
struct ol_switch_ops overlay_options = {
.port_configure = vxlan_port_init,
.tunnel_setup = vxlan_link,
.tunnel_destroy = vxlan_unlink,
.tx_handle = vxlan_tx_pkts,
.rx_handle = vxlan_rx_pkts,
.param_handle = NULL,
};
/* Enable stats. */
uint32_t enable_stats = 0;
/* Enable retries on RX. */
static uint32_t enable_retry = 1;
/* Specify timeout (in useconds) between retries on RX. */
static uint32_t burst_rx_delay_time = BURST_RX_WAIT_US;
/* Specify the number of retries on RX. */
static uint32_t burst_rx_retry_num = BURST_RX_RETRIES;
/* Character device basename. Can be set by user. */
static char dev_basename[MAX_BASENAME_SZ] = "vhost-net";
static unsigned lcore_ids[RTE_MAX_LCORE];
uint8_t ports[RTE_MAX_ETHPORTS];
static unsigned nb_ports; /**< The number of ports specified in command line */
/* ethernet addresses of ports */
struct ether_addr ports_eth_addr[RTE_MAX_ETHPORTS];
/* heads for the main used and free linked lists for the data path. */
static struct virtio_net_data_ll *ll_root_used;
static struct virtio_net_data_ll *ll_root_free;
/**
* Array of data core structures containing information on
* individual core linked lists.
*/
static struct lcore_info lcore_info[RTE_MAX_LCORE];
/* Used for queueing bursts of TX packets. */
struct mbuf_table {
unsigned len;
unsigned txq_id;
struct rte_mbuf *m_table[MAX_PKT_BURST];
};
/* TX queue for each data core. */
struct mbuf_table lcore_tx_queue[RTE_MAX_LCORE];
struct device_statistics dev_statistics[MAX_DEVICES];
/**
* Set character device basename.
*/
static int
us_vhost_parse_basename(const char *q_arg)
{
/* parse number string */
if (strlen(q_arg) >= MAX_BASENAME_SZ)
return -1;
else
snprintf((char *)&dev_basename, MAX_BASENAME_SZ, "%s", q_arg);
return 0;
}
/**
* Parse the portmask provided at run time.
*/
static int
parse_portmask(const char *portmask)
{
char *end = NULL;
unsigned long pm;
/* parse hexadecimal string */
pm = strtoul(portmask, &end, 16);
if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
return -1;
if (pm == 0)
return -1;
return pm;
}
/**
* Parse num options at run time.
*/
static int
parse_num_opt(const char *q_arg, uint32_t max_valid_value)
{
char *end = NULL;
unsigned long num;
/* parse unsigned int string */
num = strtoul(q_arg, &end, 10);
if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
return -1;
if (num > max_valid_value)
return -1;
return num;
}
/**
* Display usage
*/
static void
tep_termination_usage(const char *prgname)
{
RTE_LOG(INFO, VHOST_CONFIG, "%s [EAL options] -- -p PORTMASK\n"
" --udp-port: UDP destination port for VXLAN packet\n"
" --nb-devices[1-64]: The number of virtIO device\n"
" --tx-checksum [0|1]: inner Tx checksum offload\n"
" --tso-segsz [0-N]: TCP segment size\n"
" --decap [0|1]: tunneling packet decapsulation\n"
" --encap [0|1]: tunneling packet encapsulation\n"
" --filter-type[1-3]: filter type for tunneling packet\n"
" 1: Inner MAC and tenent ID\n"
" 2: Inner MAC and VLAN, and tenent ID\n"
" 3: Outer MAC, Inner MAC and tenent ID\n"
" -p PORTMASK: Set mask for ports to be used by application\n"
" --rx-retry [0|1]: disable/enable(default) retries on rx."
" Enable retry if destintation queue is full\n"
" --rx-retry-delay [0-N]: timeout(in usecond) between retries on RX."
" This makes effect only if retries on rx enabled\n"
" --rx-retry-num [0-N]: the number of retries on rx."
" This makes effect only if retries on rx enabled\n"
" --stats [0-N]: 0: Disable stats, N: Time in seconds to print stats\n"
" --dev-basename: The basename to be used for the character device.\n",
prgname);
}
/**
* Parse the arguments given in the command line of the application.
*/
static int
tep_termination_parse_args(int argc, char **argv)
{
int opt, ret;
int option_index;
unsigned i;
const char *prgname = argv[0];
static struct option long_option[] = {
{CMD_LINE_OPT_NB_DEVICES, required_argument, NULL, 0},
{CMD_LINE_OPT_UDP_PORT, required_argument, NULL, 0},
{CMD_LINE_OPT_TX_CHECKSUM, required_argument, NULL, 0},
{CMD_LINE_OPT_TSO_SEGSZ, required_argument, NULL, 0},
{CMD_LINE_OPT_DECAP, required_argument, NULL, 0},
{CMD_LINE_OPT_ENCAP, required_argument, NULL, 0},
{CMD_LINE_OPT_FILTER_TYPE, required_argument, NULL, 0},
{CMD_LINE_OPT_RX_RETRY, required_argument, NULL, 0},
{CMD_LINE_OPT_RX_RETRY_DELAY, required_argument, NULL, 0},
{CMD_LINE_OPT_RX_RETRY_NUM, required_argument, NULL, 0},
{CMD_LINE_OPT_STATS, required_argument, NULL, 0},
{CMD_LINE_OPT_DEV_BASENAME, required_argument, NULL, 0},
{NULL, 0, 0, 0},
};
/* Parse command line */
while ((opt = getopt_long(argc, argv, "p:",
long_option, &option_index)) != EOF) {
switch (opt) {
/* Portmask */
case 'p':
enabled_port_mask = parse_portmask(optarg);
if (enabled_port_mask == 0) {
RTE_LOG(INFO, VHOST_CONFIG,
"Invalid portmask\n");
tep_termination_usage(prgname);
return -1;
}
break;
case 0:
if (!strncmp(long_option[option_index].name,
CMD_LINE_OPT_NB_DEVICES,
sizeof(CMD_LINE_OPT_NB_DEVICES))) {
ret = parse_num_opt(optarg, MAX_DEVICES);
if (ret == -1) {
RTE_LOG(INFO, VHOST_CONFIG,
"Invalid argument for nb-devices [0-%d]\n",
MAX_DEVICES);
tep_termination_usage(prgname);
return -1;
} else
nb_devices = ret;
}
/* Enable/disable retries on RX. */
if (!strncmp(long_option[option_index].name,
CMD_LINE_OPT_RX_RETRY,
sizeof(CMD_LINE_OPT_RX_RETRY))) {
ret = parse_num_opt(optarg, 1);
if (ret == -1) {
RTE_LOG(INFO, VHOST_CONFIG,
"Invalid argument for rx-retry [0|1]\n");
tep_termination_usage(prgname);
return -1;
} else
enable_retry = ret;
}
if (!strncmp(long_option[option_index].name,
CMD_LINE_OPT_TSO_SEGSZ,
sizeof(CMD_LINE_OPT_TSO_SEGSZ))) {
ret = parse_num_opt(optarg, INT16_MAX);
if (ret == -1) {
RTE_LOG(INFO, VHOST_CONFIG,
"Invalid argument for TCP segment size [0-N]\n");
tep_termination_usage(prgname);
return -1;
} else
tso_segsz = ret;
}
if (!strncmp(long_option[option_index].name,
CMD_LINE_OPT_UDP_PORT,
sizeof(CMD_LINE_OPT_UDP_PORT))) {
ret = parse_num_opt(optarg, INT16_MAX);
if (ret == -1) {
RTE_LOG(INFO, VHOST_CONFIG,
"Invalid argument for UDP port [0-N]\n");
tep_termination_usage(prgname);
return -1;
} else
udp_port = ret;
}
/* Specify the retries delay time (in useconds) on RX.*/
if (!strncmp(long_option[option_index].name,
CMD_LINE_OPT_RX_RETRY_DELAY,
sizeof(CMD_LINE_OPT_RX_RETRY_DELAY))) {
ret = parse_num_opt(optarg, INT32_MAX);
if (ret == -1) {
RTE_LOG(INFO, VHOST_CONFIG,
"Invalid argument for rx-retry-delay [0-N]\n");
tep_termination_usage(prgname);
return -1;
} else
burst_rx_delay_time = ret;
}
/* Specify the retries number on RX. */
if (!strncmp(long_option[option_index].name,
CMD_LINE_OPT_RX_RETRY_NUM,
sizeof(CMD_LINE_OPT_RX_RETRY_NUM))) {
ret = parse_num_opt(optarg, INT32_MAX);
if (ret == -1) {
RTE_LOG(INFO, VHOST_CONFIG,
"Invalid argument for rx-retry-num [0-N]\n");
tep_termination_usage(prgname);
return -1;
} else
burst_rx_retry_num = ret;
}
if (!strncmp(long_option[option_index].name,
CMD_LINE_OPT_TX_CHECKSUM,
sizeof(CMD_LINE_OPT_TX_CHECKSUM))) {
ret = parse_num_opt(optarg, 1);
if (ret == -1) {
RTE_LOG(INFO, VHOST_CONFIG,
"Invalid argument for tx-checksum [0|1]\n");
tep_termination_usage(prgname);
return -1;
} else
tx_checksum = ret;
}
if (!strncmp(long_option[option_index].name,
CMD_LINE_OPT_FILTER_TYPE,
sizeof(CMD_LINE_OPT_FILTER_TYPE))) {
ret = parse_num_opt(optarg, 3);
if ((ret == -1) || (ret == 0)) {
RTE_LOG(INFO, VHOST_CONFIG,
"Invalid argument for filter type [1-3]\n");
tep_termination_usage(prgname);
return -1;
} else
filter_idx = ret - 1;
}
/* Enable/disable encapsulation on RX. */
if (!strncmp(long_option[option_index].name,
CMD_LINE_OPT_DECAP,
sizeof(CMD_LINE_OPT_DECAP))) {
ret = parse_num_opt(optarg, 1);
if (ret == -1) {
RTE_LOG(INFO, VHOST_CONFIG,
"Invalid argument for decap [0|1]\n");
tep_termination_usage(prgname);
return -1;
} else
rx_decap = ret;
}
/* Enable/disable encapsulation on TX. */
if (!strncmp(long_option[option_index].name,
CMD_LINE_OPT_ENCAP,
sizeof(CMD_LINE_OPT_ENCAP))) {
ret = parse_num_opt(optarg, 1);
if (ret == -1) {
RTE_LOG(INFO, VHOST_CONFIG,
"Invalid argument for encap [0|1]\n");
tep_termination_usage(prgname);
return -1;
} else
tx_encap = ret;
}
/* Enable/disable stats. */
if (!strncmp(long_option[option_index].name,
CMD_LINE_OPT_STATS,
sizeof(CMD_LINE_OPT_STATS))) {
ret = parse_num_opt(optarg, INT32_MAX);
if (ret == -1) {
RTE_LOG(INFO, VHOST_CONFIG,
"Invalid argument for stats [0..N]\n");
tep_termination_usage(prgname);
return -1;
} else
enable_stats = ret;
}
/* Set character device basename. */
if (!strncmp(long_option[option_index].name,
CMD_LINE_OPT_DEV_BASENAME,
sizeof(CMD_LINE_OPT_DEV_BASENAME))) {
if (us_vhost_parse_basename(optarg) == -1) {
RTE_LOG(INFO, VHOST_CONFIG,
"Invalid argument for character "
"device basename (Max %d characters)\n",
MAX_BASENAME_SZ);
tep_termination_usage(prgname);
return -1;
}
}
break;
/* Invalid option - print options. */
default:
tep_termination_usage(prgname);
return -1;
}
}
for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
if (enabled_port_mask & (1 << i))
ports[nb_ports++] = (uint8_t)i;
}
if ((nb_ports == 0) || (nb_ports > MAX_SUP_PORTS)) {
RTE_LOG(INFO, VHOST_PORT, "Current enabled port number is %u,"
"but only %u port can be enabled\n", nb_ports,
MAX_SUP_PORTS);
return -1;
}
return 0;
}
/**
* Update the global var NB_PORTS and array PORTS
* according to system ports number and return valid ports number
*/
static unsigned
check_ports_num(unsigned max_nb_ports)
{
unsigned valid_nb_ports = nb_ports;
unsigned portid;
if (nb_ports > max_nb_ports) {
RTE_LOG(INFO, VHOST_PORT, "\nSpecified port number(%u) "
" exceeds total system port number(%u)\n",
nb_ports, max_nb_ports);
nb_ports = max_nb_ports;
}
for (portid = 0; portid < nb_ports; portid++) {
if (ports[portid] >= max_nb_ports) {
RTE_LOG(INFO, VHOST_PORT,
"\nSpecified port ID(%u) exceeds max "
" system port ID(%u)\n",
ports[portid], (max_nb_ports - 1));
ports[portid] = INVALID_PORT_ID;
valid_nb_ports--;
}
}
return valid_nb_ports;
}
/**
* This function routes the TX packet to the correct interface. This may be a local device
* or the physical port.
*/
static inline void __attribute__((always_inline))
virtio_tx_route(struct vhost_dev *vdev, struct rte_mbuf *m)
{
struct mbuf_table *tx_q;
struct rte_mbuf **m_table;
unsigned len, ret = 0;
const uint16_t lcore_id = rte_lcore_id();
struct virtio_net *dev = vdev->dev;
RTE_LOG(DEBUG, VHOST_DATA, "(%" PRIu64 ") TX: MAC address is external\n",
dev->device_fh);
/* Add packet to the port tx queue */
tx_q = &lcore_tx_queue[lcore_id];
len = tx_q->len;
tx_q->m_table[len] = m;
len++;
if (enable_stats) {
dev_statistics[dev->device_fh].tx_total++;
dev_statistics[dev->device_fh].tx++;
}
if (unlikely(len == MAX_PKT_BURST)) {
m_table = (struct rte_mbuf **)tx_q->m_table;
ret = overlay_options.tx_handle(ports[0],
(uint16_t)tx_q->txq_id, m_table,
(uint16_t)tx_q->len);
/* Free any buffers not handled by TX and update
* the port stats.
*/
if (unlikely(ret < len)) {
do {
rte_pktmbuf_free(m_table[ret]);
} while (++ret < len);
}
len = 0;
}
tx_q->len = len;
return;
}
/**
* This function is called by each data core. It handles all
* RX/TX registered with the core. For TX the specific lcore
* linked list is used. For RX, MAC addresses are compared
* with all devices in the main linked list.
*/
static int
switch_worker(__rte_unused void *arg)
{
struct rte_mempool *mbuf_pool = arg;
struct virtio_net *dev = NULL;
struct vhost_dev *vdev = NULL;
struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
struct virtio_net_data_ll *dev_ll;
struct mbuf_table *tx_q;
volatile struct lcore_ll_info *lcore_ll;
const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1)
/ US_PER_S * BURST_TX_DRAIN_US;
uint64_t prev_tsc, diff_tsc, cur_tsc, ret_count = 0;
unsigned i, ret = 0;
const uint16_t lcore_id = rte_lcore_id();
const uint16_t num_cores = (uint16_t)rte_lcore_count();
uint16_t rx_count = 0;
uint16_t tx_count;
uint32_t retry = 0;
RTE_LOG(INFO, VHOST_DATA, "Procesing on Core %u started\n", lcore_id);
lcore_ll = lcore_info[lcore_id].lcore_ll;
prev_tsc = 0;
tx_q = &lcore_tx_queue[lcore_id];
for (i = 0; i < num_cores; i++) {
if (lcore_ids[i] == lcore_id) {
tx_q->txq_id = i;
break;
}
}
while (1) {
cur_tsc = rte_rdtsc();
/*
* TX burst queue drain
*/
diff_tsc = cur_tsc - prev_tsc;
if (unlikely(diff_tsc > drain_tsc)) {
if (tx_q->len) {
RTE_LOG(DEBUG, VHOST_DATA, "TX queue drained after "
"timeout with burst size %u\n",
tx_q->len);
ret = overlay_options.tx_handle(ports[0],
(uint16_t)tx_q->txq_id,
(struct rte_mbuf **)tx_q->m_table,
(uint16_t)tx_q->len);
if (unlikely(ret < tx_q->len)) {
do {
rte_pktmbuf_free(tx_q->m_table[ret]);
} while (++ret < tx_q->len);
}
tx_q->len = 0;
}
prev_tsc = cur_tsc;
}
rte_prefetch0(lcore_ll->ll_root_used);
/**
* Inform the configuration core that we have exited
* the linked list and that no devices are
* in use if requested.
*/
if (lcore_ll->dev_removal_flag == REQUEST_DEV_REMOVAL)
lcore_ll->dev_removal_flag = ACK_DEV_REMOVAL;
/*
* Process devices
*/
dev_ll = lcore_ll->ll_root_used;
while (dev_ll != NULL) {
vdev = dev_ll->vdev;
dev = vdev->dev;
if (unlikely(vdev->remove)) {
dev_ll = dev_ll->next;
overlay_options.tunnel_destroy(vdev);
vdev->ready = DEVICE_SAFE_REMOVE;
continue;
}
if (likely(vdev->ready == DEVICE_RX)) {
/* Handle guest RX */
rx_count = rte_eth_rx_burst(ports[0],
vdev->rx_q, pkts_burst, MAX_PKT_BURST);
if (rx_count) {
/*
* Retry is enabled and the queue is
* full then we wait and retry to
* avoid packet loss. Here MAX_PKT_BURST
* must be less than virtio queue size
*/
if (enable_retry && unlikely(rx_count >
rte_vring_available_entries(dev, VIRTIO_RXQ))) {
for (retry = 0; retry < burst_rx_retry_num;
retry++) {
rte_delay_us(burst_rx_delay_time);
if (rx_count <= rte_vring_available_entries(dev, VIRTIO_RXQ))
break;
}
}
ret_count = overlay_options.rx_handle(dev, pkts_burst, rx_count);
if (enable_stats) {
rte_atomic64_add(
&dev_statistics[dev->device_fh].rx_total_atomic,
rx_count);
rte_atomic64_add(
&dev_statistics[dev->device_fh].rx_atomic, ret_count);
}
while (likely(rx_count)) {
rx_count--;
rte_pktmbuf_free(pkts_burst[rx_count]);
}
}
}
if (likely(!vdev->remove)) {
/* Handle guest TX*/
tx_count = rte_vhost_dequeue_burst(dev,
VIRTIO_TXQ, mbuf_pool,
pkts_burst, MAX_PKT_BURST);
/* If this is the first received packet we need to learn the MAC */
if (unlikely(vdev->ready == DEVICE_MAC_LEARNING) && tx_count) {
if (vdev->remove ||
(overlay_options.tunnel_setup(vdev, pkts_burst[0]) == -1)) {
while (tx_count)
rte_pktmbuf_free(pkts_burst[--tx_count]);
}
}
while (tx_count)
virtio_tx_route(vdev, pkts_burst[--tx_count]);
}
/* move to the next device in the list */
dev_ll = dev_ll->next;
}
}
return 0;
}
/**
* Add an entry to a used linked list. A free entry must first be found
* in the free linked list using get_data_ll_free_entry();
*/
static void
add_data_ll_entry(struct virtio_net_data_ll **ll_root_addr,
struct virtio_net_data_ll *ll_dev)
{
struct virtio_net_data_ll *ll = *ll_root_addr;
/* Set next as NULL and use a compiler barrier to avoid reordering. */
ll_dev->next = NULL;
rte_compiler_barrier();
/* If ll == NULL then this is the first device. */
if (ll) {
/* Increment to the tail of the linked list. */
while (ll->next != NULL)
ll = ll->next;
ll->next = ll_dev;
} else {
*ll_root_addr = ll_dev;
}
}
/**
* Remove an entry from a used linked list. The entry must then be added to
* the free linked list using put_data_ll_free_entry().
*/
static void
rm_data_ll_entry(struct virtio_net_data_ll **ll_root_addr,
struct virtio_net_data_ll *ll_dev,
struct virtio_net_data_ll *ll_dev_last)
{
struct virtio_net_data_ll *ll = *ll_root_addr;
if (unlikely((ll == NULL) || (ll_dev == NULL)))
return;
if (ll_dev == ll)
*ll_root_addr = ll_dev->next;
else
if (likely(ll_dev_last != NULL))
ll_dev_last->next = ll_dev->next;
else
RTE_LOG(ERR, VHOST_CONFIG,
"Remove entry form ll failed.\n");
}
/**
* Find and return an entry from the free linked list.
*/
static struct virtio_net_data_ll *
get_data_ll_free_entry(struct virtio_net_data_ll **ll_root_addr)
{
struct virtio_net_data_ll *ll_free = *ll_root_addr;
struct virtio_net_data_ll *ll_dev;
if (ll_free == NULL)
return NULL;
ll_dev = ll_free;
*ll_root_addr = ll_free->next;
return ll_dev;
}
/**
* Place an entry back on to the free linked list.
*/
static void
put_data_ll_free_entry(struct virtio_net_data_ll **ll_root_addr,
struct virtio_net_data_ll *ll_dev)
{
struct virtio_net_data_ll *ll_free = *ll_root_addr;
if (ll_dev == NULL)
return;
ll_dev->next = ll_free;
*ll_root_addr = ll_dev;
}
/**
* Creates a linked list of a given size.
*/
static struct virtio_net_data_ll *
alloc_data_ll(uint32_t size)
{
struct virtio_net_data_ll *ll_new;
uint32_t i;
/* Malloc and then chain the linked list. */
ll_new = malloc(size * sizeof(struct virtio_net_data_ll));
if (ll_new == NULL) {
RTE_LOG(ERR, VHOST_CONFIG,
"Failed to allocate memory for ll_new.\n");
return NULL;
}
for (i = 0; i < size - 1; i++) {
ll_new[i].vdev = NULL;
ll_new[i].next = &ll_new[i+1];
}
ll_new[i].next = NULL;
return ll_new;
}
/**
* Create the main linked list along with each individual cores
* linked list. A used and a free list are created to manage entries.
*/
static int
init_data_ll(void)
{
int lcore;
RTE_LCORE_FOREACH_SLAVE(lcore) {
lcore_info[lcore].lcore_ll =
malloc(sizeof(struct lcore_ll_info));
if (lcore_info[lcore].lcore_ll == NULL) {
RTE_LOG(ERR, VHOST_CONFIG,
"Failed to allocate memory for lcore_ll.\n");
return -1;
}
lcore_info[lcore].lcore_ll->device_num = 0;
lcore_info[lcore].lcore_ll->dev_removal_flag = ACK_DEV_REMOVAL;
lcore_info[lcore].lcore_ll->ll_root_used = NULL;
if (nb_devices % nb_switching_cores)
lcore_info[lcore].lcore_ll->ll_root_free =
alloc_data_ll((nb_devices / nb_switching_cores)
+ 1);
else
lcore_info[lcore].lcore_ll->ll_root_free =
alloc_data_ll(nb_devices / nb_switching_cores);
}
/* Allocate devices up to a maximum of MAX_DEVICES. */
ll_root_free = alloc_data_ll(MIN((nb_devices), MAX_DEVICES));
return 0;
}
/**
* Remove a device from the specific data core linked list and
* from the main linked list. Synchonization occurs through the use
* of the lcore dev_removal_flag. Device is made volatile here
* to avoid re-ordering of dev->remove=1 which can cause an infinite
* loop in the rte_pause loop.
*/
static void
destroy_device(volatile struct virtio_net *dev)
{
struct virtio_net_data_ll *ll_lcore_dev_cur;
struct virtio_net_data_ll *ll_main_dev_cur;
struct virtio_net_data_ll *ll_lcore_dev_last = NULL;
struct virtio_net_data_ll *ll_main_dev_last = NULL;
struct vhost_dev *vdev;
int lcore;
dev->flags &= ~VIRTIO_DEV_RUNNING;
vdev = (struct vhost_dev *)dev->priv;
/* set the remove flag. */
vdev->remove = 1;
while (vdev->ready != DEVICE_SAFE_REMOVE)
rte_pause();
/* Search for entry to be removed from lcore ll */
ll_lcore_dev_cur = lcore_info[vdev->coreid].lcore_ll->ll_root_used;
while (ll_lcore_dev_cur != NULL) {
if (ll_lcore_dev_cur->vdev == vdev) {
break;
} else {
ll_lcore_dev_last = ll_lcore_dev_cur;
ll_lcore_dev_cur = ll_lcore_dev_cur->next;
}
}
if (ll_lcore_dev_cur == NULL) {
RTE_LOG(ERR, VHOST_CONFIG,
"(%"PRIu64") Failed to find the dev to be destroy.\n",
dev->device_fh);
return;
}
/* Search for entry to be removed from main ll */
ll_main_dev_cur = ll_root_used;
ll_main_dev_last = NULL;
while (ll_main_dev_cur != NULL) {
if (ll_main_dev_cur->vdev == vdev) {
break;
} else {
ll_main_dev_last = ll_main_dev_cur;
ll_main_dev_cur = ll_main_dev_cur->next;
}
}
/* Remove entries from the lcore and main ll. */
rm_data_ll_entry(&lcore_info[vdev->coreid].lcore_ll->ll_root_used,
ll_lcore_dev_cur, ll_lcore_dev_last);
rm_data_ll_entry(&ll_root_used, ll_main_dev_cur, ll_main_dev_last);
/* Set the dev_removal_flag on each lcore. */
RTE_LCORE_FOREACH_SLAVE(lcore) {
lcore_info[lcore].lcore_ll->dev_removal_flag =
REQUEST_DEV_REMOVAL;
}
/*
* Once each core has set the dev_removal_flag to
* ACK_DEV_REMOVAL we can be sure that they can no longer access
* the device removed from the linked lists and that the devices
* are no longer in use.
*/
RTE_LCORE_FOREACH_SLAVE(lcore) {
while (lcore_info[lcore].lcore_ll->dev_removal_flag
!= ACK_DEV_REMOVAL)
rte_pause();
}
/* Add the entries back to the lcore and main free ll.*/
put_data_ll_free_entry(&lcore_info[vdev->coreid].lcore_ll->ll_root_free,
ll_lcore_dev_cur);
put_data_ll_free_entry(&ll_root_free, ll_main_dev_cur);
/* Decrement number of device on the lcore. */
lcore_info[vdev->coreid].lcore_ll->device_num--;
RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") Device has been removed "
"from data core\n", dev->device_fh);
rte_free(vdev);
}
/**
* A new device is added to a data core. First the device is added
* to the main linked list and the allocated to a specific data core.
*/
static int
new_device(struct virtio_net *dev)
{
struct virtio_net_data_ll *ll_dev;
int lcore, core_add = 0;
uint32_t device_num_min = nb_devices;
struct vhost_dev *vdev;
vdev = rte_zmalloc("vhost device", sizeof(*vdev), RTE_CACHE_LINE_SIZE);
if (vdev == NULL) {
RTE_LOG(INFO, VHOST_DATA,
"(%"PRIu64") Couldn't allocate memory for vhost dev\n",
dev->device_fh);
return -1;
}
vdev->dev = dev;
dev->priv = vdev;
/* Add device to main ll */
ll_dev = get_data_ll_free_entry(&ll_root_free);
if (ll_dev == NULL) {
RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") No free entry found in"
" linked list Device limit of %d devices per core"
" has been reached\n", dev->device_fh, nb_devices);
if (vdev->regions_hpa)
rte_free(vdev->regions_hpa);
rte_free(vdev);
return -1;
}
ll_dev->vdev = vdev;
add_data_ll_entry(&ll_root_used, ll_dev);
vdev->rx_q = dev->device_fh;
/* reset ready flag */
vdev->ready = DEVICE_MAC_LEARNING;
vdev->remove = 0;
/* Find a suitable lcore to add the device. */
RTE_LCORE_FOREACH_SLAVE(lcore) {
if (lcore_info[lcore].lcore_ll->device_num < device_num_min) {
device_num_min = lcore_info[lcore].lcore_ll->device_num;
core_add = lcore;
}
}
/* Add device to lcore ll */
ll_dev = get_data_ll_free_entry(&lcore_info[core_add].lcore_ll->ll_root_free);
if (ll_dev == NULL) {
RTE_LOG(INFO, VHOST_DATA,
"(%"PRIu64") Failed to add device to data core\n",
dev->device_fh);
vdev->ready = DEVICE_SAFE_REMOVE;
destroy_device(dev);
rte_free(vdev->regions_hpa);
rte_free(vdev);
return -1;
}
ll_dev->vdev = vdev;
vdev->coreid = core_add;
add_data_ll_entry(&lcore_info[vdev->coreid].lcore_ll->ll_root_used,
ll_dev);
/* Initialize device stats */
memset(&dev_statistics[dev->device_fh], 0,
sizeof(struct device_statistics));
/* Disable notifications. */
rte_vhost_enable_guest_notification(dev, VIRTIO_RXQ, 0);
rte_vhost_enable_guest_notification(dev, VIRTIO_TXQ, 0);
lcore_info[vdev->coreid].lcore_ll->device_num++;
dev->flags |= VIRTIO_DEV_RUNNING;
RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") Device has been added to data core %d\n",
dev->device_fh, vdev->coreid);
return 0;
}
/**
* These callback allow devices to be added to the data core when configuration
* has been fully complete.
*/
static const struct virtio_net_device_ops virtio_net_device_ops = {
.new_device = new_device,
.destroy_device = destroy_device,
};
/**
* This is a thread will wake up after a period to print stats if the user has
* enabled them.
*/
static void
print_stats(void)
{
struct virtio_net_data_ll *dev_ll;
uint64_t tx_dropped, rx_dropped;
uint64_t tx, tx_total, rx, rx_total, rx_ip_csum, rx_l4_csum;
uint32_t device_fh;
const char clr[] = { 27, '[', '2', 'J', '\0' };
const char top_left[] = { 27, '[', '1', ';', '1', 'H', '\0' };
while (1) {
sleep(enable_stats);
/* Clear screen and move to top left */
printf("%s%s", clr, top_left);
printf("\nDevice statistics ================================");
dev_ll = ll_root_used;
while (dev_ll != NULL) {
device_fh = (uint32_t)dev_ll->vdev->dev->device_fh;
tx_total = dev_statistics[device_fh].tx_total;
tx = dev_statistics[device_fh].tx;
tx_dropped = tx_total - tx;
rx_total = rte_atomic64_read(
&dev_statistics[device_fh].rx_total_atomic);
rx = rte_atomic64_read(
&dev_statistics[device_fh].rx_atomic);
rx_dropped = rx_total - rx;
rx_ip_csum = rte_atomic64_read(
&dev_statistics[device_fh].rx_bad_ip_csum);
rx_l4_csum = rte_atomic64_read(
&dev_statistics[device_fh].rx_bad_l4_csum);
printf("\nStatistics for device %"PRIu32" ----------"
"\nTX total: %"PRIu64""
"\nTX dropped: %"PRIu64""
"\nTX successful: %"PRIu64""
"\nRX total: %"PRIu64""
"\nRX bad IP csum: %"PRIu64""
"\nRX bad L4 csum: %"PRIu64""
"\nRX dropped: %"PRIu64""
"\nRX successful: %"PRIu64"",
device_fh,
tx_total,
tx_dropped,
tx,
rx_total,
rx_ip_csum,
rx_l4_csum,
rx_dropped,
rx);
dev_ll = dev_ll->next;
}
printf("\n================================================\n");
}
}
/**
* Main function, does initialisation and calls the per-lcore functions. The CUSE
* device is also registered here to handle the IOCTLs.
*/
int
main(int argc, char *argv[])
{
struct rte_mempool *mbuf_pool = NULL;
unsigned lcore_id, core_id = 0;
unsigned nb_ports, valid_nb_ports;
int ret;
uint8_t portid;
uint16_t queue_id;
static pthread_t tid;
char thread_name[RTE_MAX_THREAD_NAME_LEN];
/* init EAL */
ret = rte_eal_init(argc, argv);
if (ret < 0)
rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
argc -= ret;
argv += ret;
/* parse app arguments */
ret = tep_termination_parse_args(argc, argv);
if (ret < 0)
rte_exit(EXIT_FAILURE, "Invalid argument\n");
for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++)
if (rte_lcore_is_enabled(lcore_id))
lcore_ids[core_id++] = lcore_id;
/* set the number of swithcing cores available */
nb_switching_cores = rte_lcore_count()-1;
/* Get the number of physical ports. */
nb_ports = rte_eth_dev_count();
if (nb_ports > RTE_MAX_ETHPORTS)
nb_ports = RTE_MAX_ETHPORTS;
/*
* Update the global var NB_PORTS and global array PORTS
* and get value of var VALID_NB_PORTS according to system ports number
*/
valid_nb_ports = check_ports_num(nb_ports);
if ((valid_nb_ports == 0) || (valid_nb_ports > MAX_SUP_PORTS)) {
rte_exit(EXIT_FAILURE, "Current enabled port number is %u,"
"but only %u port can be enabled\n", nb_ports,
MAX_SUP_PORTS);
}
/* Create the mbuf pool. */
mbuf_pool = rte_mempool_create(
"MBUF_POOL",
NUM_MBUFS_PER_PORT
* valid_nb_ports,
MBUF_SIZE, MBUF_CACHE_SIZE,
sizeof(struct rte_pktmbuf_pool_private),
rte_pktmbuf_pool_init, NULL,
rte_pktmbuf_init, NULL,
rte_socket_id(), 0);
if (mbuf_pool == NULL)
rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
for (queue_id = 0; queue_id < MAX_QUEUES + 1; queue_id++)
vpool_array[queue_id].pool = mbuf_pool;
/* initialize all ports */
for (portid = 0; portid < nb_ports; portid++) {
/* skip ports that are not enabled */
if ((enabled_port_mask & (1 << portid)) == 0) {
RTE_LOG(INFO, VHOST_PORT,
"Skipping disabled port %d\n", portid);
continue;
}
if (overlay_options.port_configure(portid, mbuf_pool) != 0)
rte_exit(EXIT_FAILURE,
"Cannot initialize network ports\n");
}
/* Initialise all linked lists. */
if (init_data_ll() == -1)
rte_exit(EXIT_FAILURE, "Failed to initialize linked list\n");
/* Initialize device stats */
memset(&dev_statistics, 0, sizeof(dev_statistics));
/* Enable stats if the user option is set. */
if (enable_stats) {
ret = pthread_create(&tid, NULL, (void *)print_stats, NULL);
if (ret != 0)
rte_exit(EXIT_FAILURE, "Cannot create print-stats thread\n");
snprintf(thread_name, RTE_MAX_THREAD_NAME_LEN, "print-stats");
ret = rte_thread_setname(tid, thread_name);
if (ret != 0)
RTE_LOG(ERR, VHOST_CONFIG, "Cannot set print-stats name\n");
}
/* Launch all data cores. */
RTE_LCORE_FOREACH_SLAVE(lcore_id) {
rte_eal_remote_launch(switch_worker,
mbuf_pool, lcore_id);
}
rte_vhost_feature_disable(1ULL << VIRTIO_NET_F_MRG_RXBUF);
/* Register CUSE device to handle IOCTLs. */
ret = rte_vhost_driver_register((char *)&dev_basename);
if (ret != 0)
rte_exit(EXIT_FAILURE, "CUSE device setup failure.\n");
rte_vhost_driver_callback_register(&virtio_net_device_ops);
/* Start CUSE session. */
rte_vhost_driver_session_start();
return 0;
}
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