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#include <unistd.h>
#include <string.h>
#include <pthread.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <linux/if.h>
#include <rte_config.h>
#include <rte_mbuf.h>
#include <rte_ethdev.h>
#include <rte_kni.h>
#include <rte_malloc.h>
#include <rte_errno.h>
#include "init.h"
#include "conf_file.h"
#include "common.h"
#include "dev.h"
#include "kni_dev.h"
#include "iputils.h"
struct knidev {
int port;
int xport;
struct net_device *dev;
struct rte_kni *kni;
int ifindex;
};
static int kni_cnt;
static struct knidev **dev_list;
int kni_dev_count()
{
return kni_cnt;
}
uint16_t kni_dev_rx_burst(uint8_t port_id, uint16_t queue_id, struct rte_mbuf **rx_pkts, const uint16_t nb_pkts)
{
return rte_kni_rx_burst(dev_list[port_id]->kni, rx_pkts, nb_pkts);
}
uint16_t kni_dev_tx_burst(uint8_t port_id, uint16_t queue_id, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
{
return rte_kni_tx_burst(dev_list[port_id]->kni, tx_pkts, nb_pkts);
}
static void knidev_xmit(struct rte_mbuf *mbuf, struct net_device *dev)
{
struct knidev *kni_dev = netdev_priv(dev);
mbuf->port = kni_dev->xport;
}
static int kni_change_mtu(uint8_t port, unsigned mtu)
{
return 0;
}
static int kni_config_network_if(uint8_t port, uint8_t if_up)
{
return 0;
}
static int parse_ip_addr(const char *str, in_addr_t *addr, int *mask)
{
char *ptr = strchr(str, '/');
char tmp[32];
if (ptr) {
memcpy(tmp, str, ptr - str);
tmp[ptr - str] = 0;
*addr = inet_addr(tmp);
*mask = atoi(ptr + 1);
if (*mask <= 0 || *mask > 32)
return -1;
} else {
*addr = inet_addr(str);
*mask = 32;
}
return *addr == INADDR_NONE;
}
struct ifconfig_arg {
struct knidev *dev;
struct conf_opt *opt;
int err;
};
static void *kni_ifconfig(void *a)
{
struct ifconfig_arg *arg = a;
struct knidev *dev = arg->dev;
struct conf_opt *opt = arg->opt;
struct ifreq ifr;
const char *opt1;
in_addr_t addr;
int mask;
strcpy(ifr.ifr_name, opt->name);
if (ioctl(sock_fd, SIOCGIFINDEX, &ifr, sizeof(ifr))) {
fprintf(stderr, "%s: SIOCGIFINDEX: %s\n", opt->name, strerror(errno));
arg->err = errno;
return NULL;
}
dev->ifindex = ifr.ifr_ifindex;
ioctl(sock_fd, SIOCGIFFLAGS, &ifr, sizeof(ifr));
ifr.ifr_flags |= IFF_UP | IFF_NOARP;
while (ioctl(sock_fd, SIOCSIFFLAGS, &ifr, sizeof(ifr)))
sleep(1);
opt1 = conf_get_subopt(opt, "ip-addr");
if (opt1) {
if (parse_ip_addr(opt1, &addr, &mask)) {
arg->err = EINVAL;
return NULL;
}
ipaddr_add(dev->ifindex, addr, mask);
}
arg->err = 0;
return NULL;
}
int kni_dev_init(struct rte_mempool *mbuf_pool)
{
struct conf_sect *s = conf_get_sect("interface");
struct conf_opt *opt;
struct rte_kni_conf conf;
struct rte_kni_ops ops;
struct rte_kni *kni;
struct net_device *dev;
struct knidev *knidev;
pthread_t tid;
struct ifconfig_arg arg;
int i = 0, x = rte_eth_dev_count();
for (opt = s->opt; opt; opt = opt->next) {
const char *busid = conf_get_subopt(opt, "busid");
if (!strcmp(busid, "kni"))
kni_cnt++;
}
if (!kni_cnt)
return 0;
rte_kni_init(kni_cnt);
dev_list = rte_malloc(NULL, kni_cnt * sizeof(void *), 0);
memset(&conf, 0, sizeof(conf));
memset(&ops, 0, sizeof(ops));
ops.change_mtu = kni_change_mtu;
ops.config_network_if = kni_config_network_if;
for (opt = s->opt; opt; opt = opt->next) {
const char *busid = conf_get_subopt(opt, "busid");
if (strcmp(busid, "kni"))
continue;
strcpy(conf.name, opt->name);
conf.group_id = i;
conf.mbuf_size = ETHER_MAX_LEN + 8;
ops.port_id = i;
kni = rte_kni_alloc(mbuf_pool, &conf, &ops);
if (!kni) {
fprintf(stderr, "failed to create %s\n", opt->name);
return -1;
}
dev = netdev_alloc(opt->name, sizeof(*knidev), NULL);
dev->xmit = knidev_xmit;
knidev = netdev_priv(dev);
knidev->port = i;
knidev->xport = i + x;
knidev->dev = dev;
knidev->kni = kni;
dev_list[i] = knidev;
arg.dev = knidev;
arg.opt = opt;
arg.err = -1;
pthread_create(&tid, NULL, kni_ifconfig, &arg);
while (arg.err == -1)
rte_kni_handle_request(kni);
pthread_join(tid, NULL);
if (arg.err != 0)
return -1;
}
return 0;
}
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