@@ -45,10 +45,21 @@ int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
int len = sizeof(struct virtio_net_hdr);
unsigned int features;
- fd = RETRY_ON_EINTR(open(PATH_NET_TUN, O_RDWR));
+
+ ret = if_nametoindex(ifname);
+ if (ret) {
+ g_autofree char *file = g_strdup_printf("/dev/tap%d", ret);
+ fd = open(file, O_RDWR);
+ } else {
+ fd = -1;
+ }
+
if (fd < 0) {
- error_setg_errno(errp, errno, "could not open %s", PATH_NET_TUN);
- return -1;
+ fd = RETRY_ON_EINTR(open(PATH_NET_TUN, O_RDWR));
+ if (fd < 0) {
+ error_setg_errno(errp, errno, "could not open %s", PATH_NET_TUN);
+ return -1;
+ }
}
memset(&ifr, 0, sizeof(ifr));
ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
ipvtap and macvtap create a file for each interface unlike tuntap, which creates one file shared by all interfaces. Try to open a file dedicated to the interface first for ipvtap and macvtap. Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com> --- net/tap-linux.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-) --- base-commit: 31669121a01a14732f57c49400bc239cf9fd505f change-id: 20241008-macvtap-b152e5abb457 Best regards,