return 0;
}
+
+int __rte_experimental
+rte_kni_update_link(struct rte_kni *kni, unsigned int linkup)
+{
+ char path[64];
+ char old_carrier[2];
+ const char *new_carrier;
+ int old_linkup;
+ int fd, ret;
+
+ if (kni == NULL)
+ return -1;
+
+ snprintf(path, sizeof(path), "/sys/devices/virtual/net/%s/carrier",
+ kni->name);
+
+ fd = open(path, O_RDWR);
+ if (fd == -1) {
+ RTE_LOG(ERR, KNI, "Failed to open file: %s.\n", path);
+ return -1;
+ }
+
+ ret = read(fd, old_carrier, 2);
+ if (ret < 1) {
+ close(fd);
+ return -1;
+ }
+ old_linkup = (old_carrier[0] == '1');
+
+ new_carrier = linkup ? "1" : "0";
+ ret = write(fd, new_carrier, 1);
+ if (ret < 1) {
+ RTE_LOG(ERR, KNI, "Failed to write file: %s.\n", path);
+ close(fd);
+ return -1;
+ }
+
+ close(fd);
+ return old_linkup;
+}
+
void
rte_kni_close(void)
{