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34 #include <arpa/inet.h>
36 #include <linux/if_ether.h>
37 #include <linux/if_vlan.h>
38 #include <linux/virtio_net.h>
39 #include <linux/virtio_ring.h>
42 #include <sys/eventfd.h>
43 #include <sys/param.h>
46 #include <rte_atomic.h>
47 #include <rte_cycles.h>
48 #include <rte_ethdev.h>
50 #include <rte_string_fns.h>
53 #include "virtio-net.h"
54 #include "xen_vhost.h"
56 #define MAX_QUEUES 128
58 /* the maximum number of external ports supported */
59 #define MAX_SUP_PORTS 1
62 * Calculate the number of buffers needed per port
64 #define NUM_MBUFS_PER_PORT ((MAX_QUEUES*RTE_TEST_RX_DESC_DEFAULT) + \
65 (num_switching_cores*MAX_PKT_BURST) + \
66 (num_switching_cores*RTE_TEST_TX_DESC_DEFAULT) +\
67 (num_switching_cores*MBUF_CACHE_SIZE))
69 #define MBUF_CACHE_SIZE 64
72 * RX and TX Prefetch, Host, and Write-back threshold values should be
73 * carefully set for optimal performance. Consult the network
74 * controller's datasheet and supporting DPDK documentation for guidance
75 * on how these parameters should be set.
77 #define RX_PTHRESH 8 /* Default values of RX prefetch threshold reg. */
78 #define RX_HTHRESH 8 /* Default values of RX host threshold reg. */
79 #define RX_WTHRESH 4 /* Default values of RX write-back threshold reg. */
82 * These default values are optimized for use with the Intel(R) 82599 10 GbE
83 * Controller and the DPDK ixgbe PMD. Consider using other values for other
84 * network controllers and/or network drivers.
86 #define TX_PTHRESH 36 /* Default values of TX prefetch threshold reg. */
87 #define TX_HTHRESH 0 /* Default values of TX host threshold reg. */
88 #define TX_WTHRESH 0 /* Default values of TX write-back threshold reg. */
90 #define MAX_PKT_BURST 32 /* Max burst size for RX/TX */
91 #define MAX_MRG_PKT_BURST 16 /* Max burst for merge buffers. Set to 1 due to performance issue. */
92 #define BURST_TX_DRAIN_US 100 /* TX drain every ~100us */
94 /* State of virtio device. */
95 #define DEVICE_NOT_READY 0
96 #define DEVICE_READY 1
97 #define DEVICE_SAFE_REMOVE 2
99 /* Config_core_flag status definitions. */
100 #define REQUEST_DEV_REMOVAL 1
101 #define ACK_DEV_REMOVAL 0
103 /* Configurable number of RX/TX ring descriptors */
104 #define RTE_TEST_RX_DESC_DEFAULT 128
105 #define RTE_TEST_TX_DESC_DEFAULT 512
107 #define INVALID_PORT_ID 0xFF
109 /* Max number of devices. Limited by vmdq. */
110 #define MAX_DEVICES 64
112 /* Size of buffers used for snprintfs. */
113 #define MAX_PRINT_BUFF 6072
116 /* Maximum long option length for option parsing. */
117 #define MAX_LONG_OPT_SZ 64
119 /* Used to compare MAC addresses. */
120 #define MAC_ADDR_CMP 0xFFFFFFFFFFFF
122 /* mask of enabled ports */
123 static uint32_t enabled_port_mask = 0;
125 /*Number of switching cores enabled*/
126 static uint32_t num_switching_cores = 0;
128 /* number of devices/queues to support*/
129 static uint32_t num_queues = 0;
130 uint32_t num_devices = 0;
132 /* Enable VM2VM communications. If this is disabled then the MAC address compare is skipped. */
133 static uint32_t enable_vm2vm = 1;
135 static uint32_t enable_stats = 0;
137 /* empty vmdq configuration structure. Filled in programatically */
138 static const struct rte_eth_conf vmdq_conf_default = {
140 .mq_mode = ETH_MQ_RX_VMDQ_ONLY,
142 .header_split = 0, /**< Header Split disabled */
143 .hw_ip_checksum = 0, /**< IP checksum offload disabled */
144 .hw_vlan_filter = 0, /**< VLAN filtering disabled */
146 * It is necessary for 1G NIC such as I350,
147 * this fixes bug of ipv4 forwarding in guest can't
148 * forward pakets from one virtio dev to another virtio dev.
150 .hw_vlan_strip = 1, /**< VLAN strip enabled. */
151 .jumbo_frame = 0, /**< Jumbo Frame Support disabled */
152 .hw_strip_crc = 0, /**< CRC stripped by hardware */
156 .mq_mode = ETH_MQ_TX_NONE,
160 * should be overridden separately in code with
164 .nb_queue_pools = ETH_8_POOLS,
165 .enable_default_pool = 0,
168 .pool_map = {{0, 0},},
173 static unsigned lcore_ids[RTE_MAX_LCORE];
174 static uint8_t ports[RTE_MAX_ETHPORTS];
175 static unsigned num_ports = 0; /**< The number of ports specified in command line */
177 const uint16_t vlan_tags[] = {
178 1000, 1001, 1002, 1003, 1004, 1005, 1006, 1007,
179 1008, 1009, 1010, 1011, 1012, 1013, 1014, 1015,
180 1016, 1017, 1018, 1019, 1020, 1021, 1022, 1023,
181 1024, 1025, 1026, 1027, 1028, 1029, 1030, 1031,
182 1032, 1033, 1034, 1035, 1036, 1037, 1038, 1039,
183 1040, 1041, 1042, 1043, 1044, 1045, 1046, 1047,
184 1048, 1049, 1050, 1051, 1052, 1053, 1054, 1055,
185 1056, 1057, 1058, 1059, 1060, 1061, 1062, 1063,
188 /* ethernet addresses of ports */
189 static struct ether_addr vmdq_ports_eth_addr[RTE_MAX_ETHPORTS];
191 /* heads for the main used and free linked lists for the data path. */
192 static struct virtio_net_data_ll *ll_root_used = NULL;
193 static struct virtio_net_data_ll *ll_root_free = NULL;
195 /* Array of data core structures containing information on individual core linked lists. */
196 static struct lcore_info lcore_info[RTE_MAX_LCORE];
198 /* Used for queueing bursts of TX packets. */
202 struct rte_mbuf *m_table[MAX_PKT_BURST];
205 /* TX queue for each data core. */
206 struct mbuf_table lcore_tx_queue[RTE_MAX_LCORE];
208 /* Vlan header struct used to insert vlan tags on TX. */
210 unsigned char h_dest[ETH_ALEN];
211 unsigned char h_source[ETH_ALEN];
214 __be16 h_vlan_encapsulated_proto;
217 /* Header lengths. */
219 #define VLAN_ETH_HLEN 18
221 /* Per-device statistics struct */
222 struct device_statistics {
224 rte_atomic64_t rx_total;
227 } __rte_cache_aligned;
228 struct device_statistics dev_statistics[MAX_DEVICES];
231 * Builds up the correct configuration for VMDQ VLAN pool map
232 * according to the pool & queue limits.
235 get_eth_conf(struct rte_eth_conf *eth_conf, uint32_t num_devices)
237 struct rte_eth_vmdq_rx_conf conf;
240 memset(&conf, 0, sizeof(conf));
241 conf.nb_queue_pools = (enum rte_eth_nb_pools)num_devices;
242 conf.nb_pool_maps = num_devices;
244 for (i = 0; i < conf.nb_pool_maps; i++) {
245 conf.pool_map[i].vlan_id = vlan_tags[ i ];
246 conf.pool_map[i].pools = (1UL << i);
249 (void)(rte_memcpy(eth_conf, &vmdq_conf_default, sizeof(*eth_conf)));
250 (void)(rte_memcpy(ð_conf->rx_adv_conf.vmdq_rx_conf, &conf,
251 sizeof(eth_conf->rx_adv_conf.vmdq_rx_conf)));
256 * Validate the device number according to the max pool number gotten form dev_info
257 * If the device number is invalid, give the error message and return -1.
258 * Each device must have its own pool.
261 validate_num_devices(uint32_t max_nb_devices)
263 if (num_devices > max_nb_devices) {
264 RTE_LOG(ERR, VHOST_PORT, "invalid number of devices\n");
271 * Initialises a given port using global settings and with the rx buffers
272 * coming from the mbuf_pool passed as parameter
275 port_init(uint8_t port, struct rte_mempool *mbuf_pool)
277 struct rte_eth_dev_info dev_info;
278 struct rte_eth_rxconf *rxconf;
279 struct rte_eth_conf port_conf;
280 uint16_t rx_rings, tx_rings = (uint16_t)rte_lcore_count();
281 const uint16_t rx_ring_size = RTE_TEST_RX_DESC_DEFAULT, tx_ring_size = RTE_TEST_TX_DESC_DEFAULT;
285 /* The max pool number from dev_info will be used to validate the pool number specified in cmd line */
286 rte_eth_dev_info_get (port, &dev_info);
288 /*configure the number of supported virtio devices based on VMDQ limits */
289 num_devices = dev_info.max_vmdq_pools;
290 num_queues = dev_info.max_rx_queues;
292 retval = validate_num_devices(MAX_DEVICES);
296 /* Get port configuration. */
297 retval = get_eth_conf(&port_conf, num_devices);
301 if (port >= rte_eth_dev_count()) return -1;
303 rx_rings = (uint16_t)num_queues,
304 /* Configure ethernet device. */
305 retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf);
309 rte_eth_dev_info_get(port, &dev_info);
310 rxconf = &dev_info.default_rxconf;
311 rxconf->rx_drop_en = 1;
312 /* Setup the queues. */
313 for (q = 0; q < rx_rings; q ++) {
314 retval = rte_eth_rx_queue_setup(port, q, rx_ring_size,
315 rte_eth_dev_socket_id(port), rxconf,
320 for (q = 0; q < tx_rings; q ++) {
321 retval = rte_eth_tx_queue_setup(port, q, tx_ring_size,
322 rte_eth_dev_socket_id(port),
328 /* Start the device. */
329 retval = rte_eth_dev_start(port);
333 rte_eth_macaddr_get(port, &vmdq_ports_eth_addr[port]);
334 RTE_LOG(INFO, VHOST_PORT, "Max virtio devices supported: %u\n", num_devices);
335 RTE_LOG(INFO, VHOST_PORT, "Port %u MAC: %02"PRIx8" %02"PRIx8" %02"PRIx8
336 " %02"PRIx8" %02"PRIx8" %02"PRIx8"\n",
338 vmdq_ports_eth_addr[port].addr_bytes[0],
339 vmdq_ports_eth_addr[port].addr_bytes[1],
340 vmdq_ports_eth_addr[port].addr_bytes[2],
341 vmdq_ports_eth_addr[port].addr_bytes[3],
342 vmdq_ports_eth_addr[port].addr_bytes[4],
343 vmdq_ports_eth_addr[port].addr_bytes[5]);
349 * Parse the portmask provided at run time.
352 parse_portmask(const char *portmask)
359 /* parse hexadecimal string */
360 pm = strtoul(portmask, &end, 16);
361 if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0') || (errno != 0))
372 * Parse num options at run time.
375 parse_num_opt(const char *q_arg, uint32_t max_valid_value)
382 /* parse unsigned int string */
383 num = strtoul(q_arg, &end, 10);
384 if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0') || (errno != 0))
387 if (num > max_valid_value)
398 us_vhost_usage(const char *prgname)
400 RTE_LOG(INFO, VHOST_CONFIG, "%s [EAL options] -- -p PORTMASK --vm2vm [0|1] --stats [0-N] --nb-devices ND\n"
401 " -p PORTMASK: Set mask for ports to be used by application\n"
402 " --vm2vm [0|1]: disable/enable(default) vm2vm comms\n"
403 " --stats [0-N]: 0: Disable stats, N: Time in seconds to print stats\n",
408 * Parse the arguments given in the command line of the application.
411 us_vhost_parse_args(int argc, char **argv)
416 const char *prgname = argv[0];
417 static struct option long_option[] = {
418 {"vm2vm", required_argument, NULL, 0},
419 {"stats", required_argument, NULL, 0},
423 /* Parse command line */
424 while ((opt = getopt_long(argc, argv, "p:",long_option, &option_index)) != EOF) {
428 enabled_port_mask = parse_portmask(optarg);
429 if (enabled_port_mask == 0) {
430 RTE_LOG(INFO, VHOST_CONFIG, "Invalid portmask\n");
431 us_vhost_usage(prgname);
437 /* Enable/disable vm2vm comms. */
438 if (!strncmp(long_option[option_index].name, "vm2vm", MAX_LONG_OPT_SZ)) {
439 ret = parse_num_opt(optarg, 1);
441 RTE_LOG(INFO, VHOST_CONFIG, "Invalid argument for vm2vm [0|1]\n");
442 us_vhost_usage(prgname);
449 /* Enable/disable stats. */
450 if (!strncmp(long_option[option_index].name, "stats", MAX_LONG_OPT_SZ)) {
451 ret = parse_num_opt(optarg, INT32_MAX);
453 RTE_LOG(INFO, VHOST_CONFIG, "Invalid argument for stats [0..N]\n");
454 us_vhost_usage(prgname);
462 /* Invalid option - print options. */
464 us_vhost_usage(prgname);
469 for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
470 if (enabled_port_mask & (1 << i))
471 ports[num_ports++] = (uint8_t)i;
474 if ((num_ports == 0) || (num_ports > MAX_SUP_PORTS)) {
475 RTE_LOG(INFO, VHOST_PORT, "Current enabled port number is %u,"
476 "but only %u port can be enabled\n",num_ports, MAX_SUP_PORTS);
484 * Update the global var NUM_PORTS and array PORTS according to system ports number
485 * and return valid ports number
487 static unsigned check_ports_num(unsigned nb_ports)
489 unsigned valid_num_ports = num_ports;
492 if (num_ports > nb_ports) {
493 RTE_LOG(INFO, VHOST_PORT, "\nSpecified port number(%u) exceeds total system port number(%u)\n",
494 num_ports, nb_ports);
495 num_ports = nb_ports;
498 for (portid = 0; portid < num_ports; portid ++) {
499 if (ports[portid] >= nb_ports) {
500 RTE_LOG(INFO, VHOST_PORT, "\nSpecified port ID(%u) exceeds max system port ID(%u)\n",
501 ports[portid], (nb_ports - 1));
502 ports[portid] = INVALID_PORT_ID;
506 return valid_num_ports;
510 * Macro to print out packet contents. Wrapped in debug define so that the
511 * data path is not effected when debug is disabled.
514 #define PRINT_PACKET(device, addr, size, header) do { \
515 char *pkt_addr = (char*)(addr); \
516 unsigned int index; \
517 char packet[MAX_PRINT_BUFF]; \
520 snprintf(packet, MAX_PRINT_BUFF, "(%"PRIu64") Header size %d: ", (device->device_fh), (size)); \
522 snprintf(packet, MAX_PRINT_BUFF, "(%"PRIu64") Packet size %d: ", (device->device_fh), (size)); \
523 for (index = 0; index < (size); index++) { \
524 snprintf(packet + strnlen(packet, MAX_PRINT_BUFF), MAX_PRINT_BUFF - strnlen(packet, MAX_PRINT_BUFF), \
525 "%02hhx ", pkt_addr[index]); \
527 snprintf(packet + strnlen(packet, MAX_PRINT_BUFF), MAX_PRINT_BUFF - strnlen(packet, MAX_PRINT_BUFF), "\n"); \
529 LOG_DEBUG(VHOST_DATA, "%s", packet); \
532 #define PRINT_PACKET(device, addr, size, header) do{} while(0)
536 * Function to convert guest physical addresses to vhost virtual addresses. This
537 * is used to convert virtio buffer addresses.
539 static inline uint64_t __attribute__((always_inline))
540 gpa_to_vva(struct virtio_net *dev, uint64_t guest_pa)
542 struct virtio_memory_regions *region;
544 uint64_t vhost_va = 0;
546 for (regionidx = 0; regionidx < dev->mem->nregions; regionidx++) {
547 region = &dev->mem->regions[regionidx];
548 if ((guest_pa >= region->guest_phys_address) &&
549 (guest_pa <= region->guest_phys_address_end)) {
550 vhost_va = region->address_offset + guest_pa;
554 LOG_DEBUG(VHOST_DATA, "(%"PRIu64") GPA %p| VVA %p\n",
555 dev->device_fh, (void*)(uintptr_t)guest_pa, (void*)(uintptr_t)vhost_va);
561 * This function adds buffers to the virtio devices RX virtqueue. Buffers can
562 * be received from the physical port or from another virtio device. A packet
563 * count is returned to indicate the number of packets that were succesfully
564 * added to the RX queue.
566 static inline uint32_t __attribute__((always_inline))
567 virtio_dev_rx(struct virtio_net *dev, struct rte_mbuf **pkts, uint32_t count)
569 struct vhost_virtqueue *vq;
570 struct vring_desc *desc;
571 struct rte_mbuf *buff;
572 /* The virtio_hdr is initialised to 0. */
573 struct virtio_net_hdr_mrg_rxbuf virtio_hdr = {{0,0,0,0,0,0},0};
574 uint64_t buff_addr = 0;
575 uint64_t buff_hdr_addr = 0;
576 uint32_t head[MAX_PKT_BURST], packet_len = 0;
577 uint32_t head_idx, packet_success = 0;
578 uint16_t avail_idx, res_cur_idx;
579 uint16_t res_base_idx, res_end_idx;
580 uint16_t free_entries;
584 LOG_DEBUG(VHOST_DATA, "(%"PRIu64") virtio_dev_rx()\n", dev->device_fh);
585 vq = dev->virtqueue_rx;
586 count = (count > MAX_PKT_BURST) ? MAX_PKT_BURST : count;
587 /* As many data cores may want access to available buffers, they need to be reserved. */
590 res_base_idx = vq->last_used_idx_res;
592 avail_idx = *((volatile uint16_t *)&vq->avail->idx);
594 free_entries = (avail_idx - res_base_idx);
596 /*check that we have enough buffers*/
597 if (unlikely(count > free_entries))
598 count = free_entries;
603 res_end_idx = res_base_idx + count;
604 /* vq->last_used_idx_res is atomically updated. */
605 success = rte_atomic16_cmpset(&vq->last_used_idx_res, res_base_idx,
607 } while (unlikely(success == 0));
608 res_cur_idx = res_base_idx;
609 LOG_DEBUG(VHOST_DATA, "(%"PRIu64") Current Index %d| End Index %d\n", dev->device_fh, res_cur_idx, res_end_idx);
611 /* Prefetch available ring to retrieve indexes. */
612 rte_prefetch0(&vq->avail->ring[res_cur_idx & (vq->size - 1)]);
614 /* Retrieve all of the head indexes first to avoid caching issues. */
615 for (head_idx = 0; head_idx < count; head_idx++)
616 head[head_idx] = vq->avail->ring[(res_cur_idx + head_idx) & (vq->size - 1)];
618 /*Prefetch descriptor index. */
619 rte_prefetch0(&vq->desc[head[packet_success]]);
621 while (res_cur_idx != res_end_idx) {
622 /* Get descriptor from available ring */
623 desc = &vq->desc[head[packet_success]];
624 /* Prefetch descriptor address. */
627 buff = pkts[packet_success];
629 /* Convert from gpa to vva (guest physical addr -> vhost virtual addr) */
630 buff_addr = gpa_to_vva(dev, desc->addr);
631 /* Prefetch buffer address. */
632 rte_prefetch0((void*)(uintptr_t)buff_addr);
635 /* Copy virtio_hdr to packet and increment buffer address */
636 buff_hdr_addr = buff_addr;
637 packet_len = rte_pktmbuf_data_len(buff) + vq->vhost_hlen;
640 * If the descriptors are chained the header and data are placed in
643 if (desc->flags & VRING_DESC_F_NEXT) {
644 desc->len = vq->vhost_hlen;
645 desc = &vq->desc[desc->next];
646 /* Buffer address translation. */
647 buff_addr = gpa_to_vva(dev, desc->addr);
648 desc->len = rte_pktmbuf_data_len(buff);
650 buff_addr += vq->vhost_hlen;
651 desc->len = packet_len;
655 /* Update used ring with desc information */
656 vq->used->ring[res_cur_idx & (vq->size - 1)].id = head[packet_success];
657 vq->used->ring[res_cur_idx & (vq->size - 1)].len = packet_len;
659 /* Copy mbuf data to buffer */
660 userdata = rte_pktmbuf_mtod(buff, void *);
661 rte_memcpy((void *)(uintptr_t)buff_addr, userdata, rte_pktmbuf_data_len(buff));
666 /* mergeable is disabled then a header is required per buffer. */
667 rte_memcpy((void *)(uintptr_t)buff_hdr_addr, (const void *)&virtio_hdr, vq->vhost_hlen);
668 if (res_cur_idx < res_end_idx) {
669 /* Prefetch descriptor index. */
670 rte_prefetch0(&vq->desc[head[packet_success]]);
674 rte_compiler_barrier();
676 /* Wait until it's our turn to add our buffer to the used ring. */
677 while (unlikely(vq->last_used_idx != res_base_idx))
680 *(volatile uint16_t *)&vq->used->idx += count;
682 vq->last_used_idx = res_end_idx;
688 * Compares a packet destination MAC address to a device MAC address.
690 static inline int __attribute__((always_inline))
691 ether_addr_cmp(struct ether_addr *ea, struct ether_addr *eb)
693 return (((*(uint64_t *)ea ^ *(uint64_t *)eb) & MAC_ADDR_CMP) == 0);
697 * This function registers mac along with a
698 * vlan tag to a VMDQ.
701 link_vmdq(struct virtio_net *dev)
704 struct virtio_net_data_ll *dev_ll;
706 dev_ll = ll_root_used;
708 while (dev_ll != NULL) {
709 if ((dev != dev_ll->dev) && ether_addr_cmp(&dev->mac_address, &dev_ll->dev->mac_address)) {
710 RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") WARNING: This device is using an existing MAC address and has not been registered.\n", dev->device_fh);
713 dev_ll = dev_ll->next;
716 /* vlan_tag currently uses the device_id. */
717 dev->vlan_tag = vlan_tags[dev->device_fh];
718 dev->vmdq_rx_q = dev->device_fh * (num_queues/num_devices);
720 /* Print out VMDQ registration info. */
721 RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") MAC_ADDRESS %02x:%02x:%02x:%02x:%02x:%02x and VLAN_TAG %d registered\n",
723 dev->mac_address.addr_bytes[0], dev->mac_address.addr_bytes[1],
724 dev->mac_address.addr_bytes[2], dev->mac_address.addr_bytes[3],
725 dev->mac_address.addr_bytes[4], dev->mac_address.addr_bytes[5],
728 /* Register the MAC address. */
729 ret = rte_eth_dev_mac_addr_add(ports[0], &dev->mac_address, (uint32_t)dev->device_fh);
731 RTE_LOG(ERR, VHOST_DATA, "(%"PRIu64") Failed to add device MAC address to VMDQ\n",
736 /* Enable stripping of the vlan tag as we handle routing. */
737 rte_eth_dev_set_vlan_strip_on_queue(ports[0], dev->vmdq_rx_q, 1);
739 rte_compiler_barrier();
740 /* Set device as ready for RX. */
741 dev->ready = DEVICE_READY;
747 * Removes MAC address and vlan tag from VMDQ. Ensures that nothing is adding buffers to the RX
748 * queue before disabling RX on the device.
751 unlink_vmdq(struct virtio_net *dev)
755 struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
757 if (dev->ready == DEVICE_READY) {
758 /*clear MAC and VLAN settings*/
759 rte_eth_dev_mac_addr_remove(ports[0], &dev->mac_address);
760 for (i = 0; i < 6; i++)
761 dev->mac_address.addr_bytes[i] = 0;
765 /*Clear out the receive buffers*/
766 rx_count = rte_eth_rx_burst(ports[0],
767 (uint16_t)dev->vmdq_rx_q, pkts_burst, MAX_PKT_BURST);
770 for (i = 0; i < rx_count; i++)
771 rte_pktmbuf_free(pkts_burst[i]);
773 rx_count = rte_eth_rx_burst(ports[0],
774 (uint16_t)dev->vmdq_rx_q, pkts_burst, MAX_PKT_BURST);
777 dev->ready = DEVICE_NOT_READY;
782 * Check if the packet destination MAC address is for a local device. If so then put
783 * the packet on that devices RX queue. If not then return.
785 static inline unsigned __attribute__((always_inline))
786 virtio_tx_local(struct virtio_net *dev, struct rte_mbuf *m)
788 struct virtio_net_data_ll *dev_ll;
789 struct ether_hdr *pkt_hdr;
792 pkt_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *);
794 /*get the used devices list*/
795 dev_ll = ll_root_used;
797 while (dev_ll != NULL) {
798 if (likely(dev_ll->dev->ready == DEVICE_READY) && ether_addr_cmp(&(pkt_hdr->d_addr),
799 &dev_ll->dev->mac_address)) {
801 /* Drop the packet if the TX packet is destined for the TX device. */
802 if (dev_ll->dev->device_fh == dev->device_fh) {
803 LOG_DEBUG(VHOST_DATA, "(%"PRIu64") TX: Source and destination MAC addresses are the same. Dropping packet.\n",
804 dev_ll->dev->device_fh);
809 LOG_DEBUG(VHOST_DATA, "(%"PRIu64") TX: MAC address is local\n", dev_ll->dev->device_fh);
811 if (dev_ll->dev->remove) {
812 /*drop the packet if the device is marked for removal*/
813 LOG_DEBUG(VHOST_DATA, "(%"PRIu64") Device is marked for removal\n", dev_ll->dev->device_fh);
815 /*send the packet to the local virtio device*/
816 ret = virtio_dev_rx(dev_ll->dev, &m, 1);
818 rte_atomic64_add(&dev_statistics[dev_ll->dev->device_fh].rx_total, 1);
819 rte_atomic64_add(&dev_statistics[dev_ll->dev->device_fh].rx, ret);
820 dev_statistics[dev->device_fh].tx_total++;
821 dev_statistics[dev->device_fh].tx += ret;
827 dev_ll = dev_ll->next;
834 * This function routes the TX packet to the correct interface. This may be a local device
835 * or the physical port.
837 static inline void __attribute__((always_inline))
838 virtio_tx_route(struct virtio_net* dev, struct rte_mbuf *m, struct rte_mempool *mbuf_pool, uint16_t vlan_tag)
840 struct mbuf_table *tx_q;
841 struct vlan_ethhdr *vlan_hdr;
842 struct rte_mbuf **m_table;
843 struct rte_mbuf *mbuf;
845 const uint16_t lcore_id = rte_lcore_id();
847 /*check if destination is local VM*/
848 if (enable_vm2vm && (virtio_tx_local(dev, m) == 0)) {
852 LOG_DEBUG(VHOST_DATA, "(%"PRIu64") TX: MAC address is external\n", dev->device_fh);
854 /*Add packet to the port tx queue*/
855 tx_q = &lcore_tx_queue[lcore_id];
858 /* Allocate an mbuf and populate the structure. */
859 mbuf = rte_pktmbuf_alloc(mbuf_pool);
863 mbuf->data_len = m->data_len + VLAN_HLEN;
864 mbuf->pkt_len = mbuf->data_len;
866 /* Copy ethernet header to mbuf. */
867 rte_memcpy(rte_pktmbuf_mtod(mbuf, void*),
868 rte_pktmbuf_mtod(m, const void*), ETH_HLEN);
871 /* Setup vlan header. Bytes need to be re-ordered for network with htons()*/
872 vlan_hdr = rte_pktmbuf_mtod(mbuf, struct vlan_ethhdr *);
873 vlan_hdr->h_vlan_encapsulated_proto = vlan_hdr->h_vlan_proto;
874 vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
875 vlan_hdr->h_vlan_TCI = htons(vlan_tag);
877 /* Copy the remaining packet contents to the mbuf. */
878 rte_memcpy(rte_pktmbuf_mtod_offset(mbuf, void *, VLAN_ETH_HLEN),
879 rte_pktmbuf_mtod_offset(m, const void *, ETH_HLEN),
880 (m->data_len - ETH_HLEN));
881 tx_q->m_table[len] = mbuf;
884 dev_statistics[dev->device_fh].tx_total++;
885 dev_statistics[dev->device_fh].tx++;
888 if (unlikely(len == MAX_PKT_BURST)) {
889 m_table = (struct rte_mbuf **)tx_q->m_table;
890 ret = rte_eth_tx_burst(ports[0], (uint16_t)tx_q->txq_id, m_table, (uint16_t) len);
891 /* Free any buffers not handled by TX and update the port stats. */
892 if (unlikely(ret < len)) {
894 rte_pktmbuf_free(m_table[ret]);
895 } while (++ret < len);
905 static inline void __attribute__((always_inline))
906 virtio_dev_tx(struct virtio_net* dev, struct rte_mempool *mbuf_pool)
909 struct vhost_virtqueue *vq;
910 struct vring_desc *desc;
911 uint64_t buff_addr = 0;
912 uint32_t head[MAX_PKT_BURST];
915 uint16_t free_entries, packet_success = 0;
918 vq = dev->virtqueue_tx;
919 avail_idx = *((volatile uint16_t *)&vq->avail->idx);
921 /* If there are no available buffers then return. */
922 if (vq->last_used_idx == avail_idx)
925 LOG_DEBUG(VHOST_DATA, "(%"PRIu64") virtio_dev_tx()\n", dev->device_fh);
927 /* Prefetch available ring to retrieve head indexes. */
928 rte_prefetch0(&vq->avail->ring[vq->last_used_idx & (vq->size - 1)]);
930 /*get the number of free entries in the ring*/
931 free_entries = avail_idx - vq->last_used_idx;
932 free_entries = unlikely(free_entries < MAX_PKT_BURST) ? free_entries : MAX_PKT_BURST;
934 LOG_DEBUG(VHOST_DATA, "(%"PRIu64") Buffers available %d\n", dev->device_fh, free_entries);
935 /* Retrieve all of the head indexes first to avoid caching issues. */
936 for (i = 0; i < free_entries; i++)
937 head[i] = vq->avail->ring[(vq->last_used_idx + i) & (vq->size - 1)];
939 /* Prefetch descriptor index. */
940 rte_prefetch0(&vq->desc[head[packet_success]]);
942 while (packet_success < free_entries) {
943 desc = &vq->desc[head[packet_success]];
944 /* Prefetch descriptor address. */
947 if (packet_success < (free_entries - 1)) {
948 /* Prefetch descriptor index. */
949 rte_prefetch0(&vq->desc[head[packet_success+1]]);
952 /* Update used index buffer information. */
953 used_idx = vq->last_used_idx & (vq->size - 1);
954 vq->used->ring[used_idx].id = head[packet_success];
955 vq->used->ring[used_idx].len = 0;
957 /* Discard first buffer as it is the virtio header */
958 desc = &vq->desc[desc->next];
960 /* Buffer address translation. */
961 buff_addr = gpa_to_vva(dev, desc->addr);
962 /* Prefetch buffer address. */
963 rte_prefetch0((void*)(uintptr_t)buff_addr);
965 /* Setup dummy mbuf. This is copied to a real mbuf if transmitted out the physical port. */
966 m.data_len = desc->len;
970 virtio_tx_route(dev, &m, mbuf_pool, 0);
976 rte_compiler_barrier();
977 vq->used->idx += packet_success;
978 /* Kick guest if required. */
982 * This function is called by each data core. It handles all RX/TX registered with the
983 * core. For TX the specific lcore linked list is used. For RX, MAC addresses are compared
984 * with all devices in the main linked list.
987 switch_worker(__attribute__((unused)) void *arg)
989 struct rte_mempool *mbuf_pool = arg;
990 struct virtio_net *dev = NULL;
991 struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
992 struct virtio_net_data_ll *dev_ll;
993 struct mbuf_table *tx_q;
994 volatile struct lcore_ll_info *lcore_ll;
995 const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) / US_PER_S * BURST_TX_DRAIN_US;
996 uint64_t prev_tsc, diff_tsc, cur_tsc, ret_count = 0;
998 const uint16_t lcore_id = rte_lcore_id();
999 const uint16_t num_cores = (uint16_t)rte_lcore_count();
1000 uint16_t rx_count = 0;
1002 RTE_LOG(INFO, VHOST_DATA, "Procesing on Core %u started \n", lcore_id);
1003 lcore_ll = lcore_info[lcore_id].lcore_ll;
1006 tx_q = &lcore_tx_queue[lcore_id];
1007 for (i = 0; i < num_cores; i ++) {
1008 if (lcore_ids[i] == lcore_id) {
1015 cur_tsc = rte_rdtsc();
1017 * TX burst queue drain
1019 diff_tsc = cur_tsc - prev_tsc;
1020 if (unlikely(diff_tsc > drain_tsc)) {
1023 LOG_DEBUG(VHOST_DATA, "TX queue drained after timeout with burst size %u \n", tx_q->len);
1025 /*Tx any packets in the queue*/
1026 ret = rte_eth_tx_burst(ports[0], (uint16_t)tx_q->txq_id,
1027 (struct rte_mbuf **)tx_q->m_table,
1028 (uint16_t)tx_q->len);
1029 if (unlikely(ret < tx_q->len)) {
1031 rte_pktmbuf_free(tx_q->m_table[ret]);
1032 } while (++ret < tx_q->len);
1043 * Inform the configuration core that we have exited the linked list and that no devices are
1044 * in use if requested.
1046 if (lcore_ll->dev_removal_flag == REQUEST_DEV_REMOVAL)
1047 lcore_ll->dev_removal_flag = ACK_DEV_REMOVAL;
1052 dev_ll = lcore_ll->ll_root_used;
1054 while (dev_ll != NULL) {
1055 /*get virtio device ID*/
1058 if (unlikely(dev->remove)) {
1059 dev_ll = dev_ll->next;
1061 dev->ready = DEVICE_SAFE_REMOVE;
1064 if (likely(dev->ready == DEVICE_READY)) {
1066 rx_count = rte_eth_rx_burst(ports[0],
1067 (uint16_t)dev->vmdq_rx_q, pkts_burst, MAX_PKT_BURST);
1070 ret_count = virtio_dev_rx(dev, pkts_burst, rx_count);
1072 rte_atomic64_add(&dev_statistics[dev_ll->dev->device_fh].rx_total, rx_count);
1073 rte_atomic64_add(&dev_statistics[dev_ll->dev->device_fh].rx, ret_count);
1075 while (likely(rx_count)) {
1077 rte_pktmbuf_free_seg(pkts_burst[rx_count]);
1083 if (likely(!dev->remove))
1085 virtio_dev_tx(dev, mbuf_pool);
1087 /*move to the next device in the list*/
1088 dev_ll = dev_ll->next;
1096 * Add an entry to a used linked list. A free entry must first be found in the free linked list
1097 * using get_data_ll_free_entry();
1100 add_data_ll_entry(struct virtio_net_data_ll **ll_root_addr, struct virtio_net_data_ll *ll_dev)
1102 struct virtio_net_data_ll *ll = *ll_root_addr;
1104 /* Set next as NULL and use a compiler barrier to avoid reordering. */
1105 ll_dev->next = NULL;
1106 rte_compiler_barrier();
1108 /* If ll == NULL then this is the first device. */
1110 /* Increment to the tail of the linked list. */
1111 while ((ll->next != NULL) )
1116 *ll_root_addr = ll_dev;
1121 * Remove an entry from a used linked list. The entry must then be added to the free linked list
1122 * using put_data_ll_free_entry().
1125 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)
1127 struct virtio_net_data_ll *ll = *ll_root_addr;
1130 *ll_root_addr = ll_dev->next;
1132 ll_dev_last->next = ll_dev->next;
1136 * Find and return an entry from the free linked list.
1138 static struct virtio_net_data_ll *
1139 get_data_ll_free_entry(struct virtio_net_data_ll **ll_root_addr)
1141 struct virtio_net_data_ll *ll_free = *ll_root_addr;
1142 struct virtio_net_data_ll *ll_dev;
1144 if (ll_free == NULL)
1148 *ll_root_addr = ll_free->next;
1154 * Place an entry back on to the free linked list.
1157 put_data_ll_free_entry(struct virtio_net_data_ll **ll_root_addr, struct virtio_net_data_ll *ll_dev)
1159 struct virtio_net_data_ll *ll_free = *ll_root_addr;
1161 ll_dev->next = ll_free;
1162 *ll_root_addr = ll_dev;
1166 * Creates a linked list of a given size.
1168 static struct virtio_net_data_ll *
1169 alloc_data_ll(uint32_t size)
1171 struct virtio_net_data_ll *ll_new;
1174 /* Malloc and then chain the linked list. */
1175 ll_new = malloc(size * sizeof(struct virtio_net_data_ll));
1176 if (ll_new == NULL) {
1177 RTE_LOG(ERR, VHOST_CONFIG, "Failed to allocate memory for ll_new.\n");
1181 for (i = 0; i < size - 1; i++) {
1182 ll_new[i].dev = NULL;
1183 ll_new[i].next = &ll_new[i+1];
1185 ll_new[i].next = NULL;
1191 * Create the main linked list along with each individual cores linked list. A used and a free list
1192 * are created to manage entries.
1199 RTE_LCORE_FOREACH_SLAVE(lcore) {
1200 lcore_info[lcore].lcore_ll = malloc(sizeof(struct lcore_ll_info));
1201 if (lcore_info[lcore].lcore_ll == NULL) {
1202 RTE_LOG(ERR, VHOST_CONFIG, "Failed to allocate memory for lcore_ll.\n");
1206 lcore_info[lcore].lcore_ll->device_num = 0;
1207 lcore_info[lcore].lcore_ll->dev_removal_flag = ACK_DEV_REMOVAL;
1208 lcore_info[lcore].lcore_ll->ll_root_used = NULL;
1209 if (num_devices % num_switching_cores)
1210 lcore_info[lcore].lcore_ll->ll_root_free = alloc_data_ll((num_devices / num_switching_cores) + 1);
1212 lcore_info[lcore].lcore_ll->ll_root_free = alloc_data_ll(num_devices / num_switching_cores);
1215 /* Allocate devices up to a maximum of MAX_DEVICES. */
1216 ll_root_free = alloc_data_ll(MIN((num_devices), MAX_DEVICES));
1221 * Remove a device from the specific data core linked list and from the main linked list. The
1222 * rx/tx thread must be set the flag to indicate that it is safe to remove the device.
1226 destroy_device (volatile struct virtio_net *dev)
1228 struct virtio_net_data_ll *ll_lcore_dev_cur;
1229 struct virtio_net_data_ll *ll_main_dev_cur;
1230 struct virtio_net_data_ll *ll_lcore_dev_last = NULL;
1231 struct virtio_net_data_ll *ll_main_dev_last = NULL;
1234 dev->flags &= ~VIRTIO_DEV_RUNNING;
1236 /*set the remove flag. */
1239 while(dev->ready != DEVICE_SAFE_REMOVE) {
1243 /* Search for entry to be removed from lcore ll */
1244 ll_lcore_dev_cur = lcore_info[dev->coreid].lcore_ll->ll_root_used;
1245 while (ll_lcore_dev_cur != NULL) {
1246 if (ll_lcore_dev_cur->dev == dev) {
1249 ll_lcore_dev_last = ll_lcore_dev_cur;
1250 ll_lcore_dev_cur = ll_lcore_dev_cur->next;
1254 /* Search for entry to be removed from main ll */
1255 ll_main_dev_cur = ll_root_used;
1256 ll_main_dev_last = NULL;
1257 while (ll_main_dev_cur != NULL) {
1258 if (ll_main_dev_cur->dev == dev) {
1261 ll_main_dev_last = ll_main_dev_cur;
1262 ll_main_dev_cur = ll_main_dev_cur->next;
1266 if (ll_lcore_dev_cur == NULL || ll_main_dev_cur == NULL) {
1267 RTE_LOG(ERR, XENHOST, "%s: could find device in per_cpu list or main_list\n", __func__);
1271 /* Remove entries from the lcore and main ll. */
1272 rm_data_ll_entry(&lcore_info[ll_lcore_dev_cur->dev->coreid].lcore_ll->ll_root_used, ll_lcore_dev_cur, ll_lcore_dev_last);
1273 rm_data_ll_entry(&ll_root_used, ll_main_dev_cur, ll_main_dev_last);
1275 /* Set the dev_removal_flag on each lcore. */
1276 RTE_LCORE_FOREACH_SLAVE(lcore) {
1277 lcore_info[lcore].lcore_ll->dev_removal_flag = REQUEST_DEV_REMOVAL;
1281 * Once each core has set the dev_removal_flag to ACK_DEV_REMOVAL we can be sure that
1282 * they can no longer access the device removed from the linked lists and that the devices
1283 * are no longer in use.
1285 RTE_LCORE_FOREACH_SLAVE(lcore) {
1286 while (lcore_info[lcore].lcore_ll->dev_removal_flag != ACK_DEV_REMOVAL) {
1291 /* Add the entries back to the lcore and main free ll.*/
1292 put_data_ll_free_entry(&lcore_info[ll_lcore_dev_cur->dev->coreid].lcore_ll->ll_root_free, ll_lcore_dev_cur);
1293 put_data_ll_free_entry(&ll_root_free, ll_main_dev_cur);
1295 /* Decrement number of device on the lcore. */
1296 lcore_info[ll_lcore_dev_cur->dev->coreid].lcore_ll->device_num--;
1298 RTE_LOG(INFO, VHOST_DATA, " #####(%"PRIu64") Device has been removed from data core\n", dev->device_fh);
1302 * A new device is added to a data core. First the device is added to the main linked list
1303 * and the allocated to a specific data core.
1306 new_device (struct virtio_net *dev)
1308 struct virtio_net_data_ll *ll_dev;
1309 int lcore, core_add = 0;
1310 uint32_t device_num_min = num_devices;
1312 /* Add device to main ll */
1313 ll_dev = get_data_ll_free_entry(&ll_root_free);
1314 if (ll_dev == NULL) {
1315 RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") No free entry found in linked list. Device limit "
1316 "of %d devices per core has been reached\n",
1317 dev->device_fh, num_devices);
1321 add_data_ll_entry(&ll_root_used, ll_dev);
1323 /*reset ready flag*/
1324 dev->ready = DEVICE_NOT_READY;
1327 /* Find a suitable lcore to add the device. */
1328 RTE_LCORE_FOREACH_SLAVE(lcore) {
1329 if (lcore_info[lcore].lcore_ll->device_num < device_num_min) {
1330 device_num_min = lcore_info[lcore].lcore_ll->device_num;
1334 /* Add device to lcore ll */
1335 ll_dev->dev->coreid = core_add;
1336 ll_dev = get_data_ll_free_entry(&lcore_info[ll_dev->dev->coreid].lcore_ll->ll_root_free);
1337 if (ll_dev == NULL) {
1338 RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") Failed to add device to data core\n", dev->device_fh);
1339 destroy_device(dev);
1343 add_data_ll_entry(&lcore_info[ll_dev->dev->coreid].lcore_ll->ll_root_used, ll_dev);
1345 /* Initialize device stats */
1346 memset(&dev_statistics[dev->device_fh], 0, sizeof(struct device_statistics));
1348 lcore_info[ll_dev->dev->coreid].lcore_ll->device_num++;
1349 dev->flags |= VIRTIO_DEV_RUNNING;
1351 RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") Device has been added to data core %d\n", dev->device_fh, dev->coreid);
1359 * These callback allow devices to be added to the data core when configuration
1360 * has been fully complete.
1362 static const struct virtio_net_device_ops virtio_net_device_ops =
1364 .new_device = new_device,
1365 .destroy_device = destroy_device,
1369 * This is a thread will wake up after a period to print stats if the user has
1375 struct virtio_net_data_ll *dev_ll;
1376 uint64_t tx_dropped, rx_dropped;
1377 uint64_t tx, tx_total, rx, rx_total;
1379 const char clr[] = { 27, '[', '2', 'J', '\0' };
1380 const char top_left[] = { 27, '[', '1', ';', '1', 'H','\0' };
1383 sleep(enable_stats);
1385 /* Clear screen and move to top left */
1386 printf("%s%s", clr, top_left);
1388 printf("\nDevice statistics ====================================");
1390 dev_ll = ll_root_used;
1391 while (dev_ll != NULL) {
1392 device_fh = (uint32_t)dev_ll->dev->device_fh;
1393 tx_total = dev_statistics[device_fh].tx_total;
1394 tx = dev_statistics[device_fh].tx;
1395 tx_dropped = tx_total - tx;
1396 rx_total = rte_atomic64_read(&dev_statistics[device_fh].rx_total);
1397 rx = rte_atomic64_read(&dev_statistics[device_fh].rx);
1398 rx_dropped = rx_total - rx;
1400 printf("\nStatistics for device %"PRIu32" ------------------------------"
1401 "\nTX total: %"PRIu64""
1402 "\nTX dropped: %"PRIu64""
1403 "\nTX successful: %"PRIu64""
1404 "\nRX total: %"PRIu64""
1405 "\nRX dropped: %"PRIu64""
1406 "\nRX successful: %"PRIu64"",
1415 dev_ll = dev_ll->next;
1417 printf("\n======================================================\n");
1422 int init_virtio_net(struct virtio_net_device_ops const * const ops);
1425 * Main function, does initialisation and calls the per-lcore functions. The CUSE
1426 * device is also registered here to handle the IOCTLs.
1429 main(int argc, char *argv[])
1431 struct rte_mempool *mbuf_pool;
1432 unsigned lcore_id, core_id = 0;
1433 unsigned nb_ports, valid_num_ports;
1436 static pthread_t tid;
1437 char thread_name[RTE_MAX_THREAD_NAME_LEN];
1440 ret = rte_eal_init(argc, argv);
1442 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
1446 /* parse app arguments */
1447 ret = us_vhost_parse_args(argc, argv);
1449 rte_exit(EXIT_FAILURE, "Invalid argument\n");
1451 for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id ++)
1452 if (rte_lcore_is_enabled(lcore_id))
1453 lcore_ids[core_id ++] = lcore_id;
1455 if (rte_lcore_count() > RTE_MAX_LCORE)
1456 rte_exit(EXIT_FAILURE,"Not enough cores\n");
1458 /*set the number of swithcing cores available*/
1459 num_switching_cores = rte_lcore_count()-1;
1461 /* Get the number of physical ports. */
1462 nb_ports = rte_eth_dev_count();
1463 if (nb_ports > RTE_MAX_ETHPORTS)
1464 nb_ports = RTE_MAX_ETHPORTS;
1467 * Update the global var NUM_PORTS and global array PORTS
1468 * and get value of var VALID_NUM_PORTS according to system ports number
1470 valid_num_ports = check_ports_num(nb_ports);
1472 if ((valid_num_ports == 0) || (valid_num_ports > MAX_SUP_PORTS)) {
1473 RTE_LOG(INFO, VHOST_PORT, "Current enabled port number is %u,"
1474 "but only %u port can be enabled\n",num_ports, MAX_SUP_PORTS);
1478 /* Create the mbuf pool. */
1479 mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL",
1480 NUM_MBUFS_PER_PORT * valid_num_ports, MBUF_CACHE_SIZE, 0,
1481 RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
1482 if (mbuf_pool == NULL)
1483 rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
1485 /* Set log level. */
1486 rte_set_log_level(LOG_LEVEL);
1488 /* initialize all ports */
1489 for (portid = 0; portid < nb_ports; portid++) {
1490 /* skip ports that are not enabled */
1491 if ((enabled_port_mask & (1 << portid)) == 0) {
1492 RTE_LOG(INFO, VHOST_PORT, "Skipping disabled port %d\n", portid);
1495 if (port_init(portid, mbuf_pool) != 0)
1496 rte_exit(EXIT_FAILURE, "Cannot initialize network ports\n");
1499 /* Initialise all linked lists. */
1500 if (init_data_ll() == -1)
1501 rte_exit(EXIT_FAILURE, "Failed to initialize linked list\n");
1503 /* Initialize device stats */
1504 memset(&dev_statistics, 0, sizeof(dev_statistics));
1506 /* Enable stats if the user option is set. */
1508 ret = pthread_create(&tid, NULL, (void *)print_stats, NULL);
1510 rte_exit(EXIT_FAILURE,
1511 "Cannot create print-stats thread\n");
1513 /* Set thread_name for aid in debugging. */
1514 snprintf(thread_name, RTE_MAX_THREAD_NAME_LEN, "print-xen-stats");
1515 ret = rte_thread_setname(tid, thread_name);
1517 RTE_LOG(ERR, VHOST_CONFIG,
1518 "Cannot set print-stats name\n");
1521 /* Launch all data cores. */
1522 RTE_LCORE_FOREACH_SLAVE(lcore_id) {
1523 rte_eal_remote_launch(switch_worker, mbuf_pool, lcore_id);
1526 init_virtio_xen(&virtio_net_device_ops);
1528 virtio_monitor_loop();