Merge tag 'net-pull-request' of https://github.com/jasowang/qemu into staging

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* tag 'net-pull-request' of https://github.com/jasowang/qemu:
  tap-linux: Open ipvtap and macvtap
  Revert "hw/net/net_tx_pkt: Fix overrun in update_sctp_checksum()"
  util/iov: Do not assert offset is in iov
  net: move backend cleanup to NIC cleanup
  net: parameterize the removing client from nc list

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 14 insertions, 3 deletions

diff --git a/net/tap-linux.c b/net/tap-linux.c
index 1226d5fda2..22ec2f45d2 100644
--- a/net/tap-linux.c
+++ b/net/tap-linux.c
@@ -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;