diff options
| author |   Neale Ranns <neale@graphiant.com> | 2021-05-20 16:09:40 +0000 |
|---|---|---|
| committer |   Mohsin Kazmi <sykazmi@cisco.com> | 2021-07-08 15:52:46 +0000 |
| commit | 0cc23b7dde261390b0ffa7a5ba2d11603b40eafa (patch) | |
| tree | 722360048b4aa9f7e247396c2008b4e66650d69c /src/vnet/devices | |
| parent | 647acd5eb4e3ff13e75fa712c3685694d2524fa6 (diff) | |
tap: Set the MTU on the TUN deivce
Type: fix
For a TAP device the MTU is set via the ethernet_register for TUN we
need to do it explicitly (like we do for other tunnel types).
Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>
Signed-off-by: Neale Ranns <neale@graphiant.com>
Change-Id: Ie6a13c795acb35b53f8d99b05c70c3e73a7b428e
Diffstat (limited to 'src/vnet/devices')
| -rw-r--r-- | src/vnet/devices/tap/tap.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/vnet/devices/tap/tap.c b/src/vnet/devices/tap/tap.c index 5b15f92051d..dfd32588383 100644 --- a/src/vnet/devices/tap/tap.c +++ b/src/vnet/devices/tap/tap.c @@ -66,6 +66,10 @@ VNET_HW_INTERFACE_CLASS (tun_device_hw_interface_class, static) = }; /* *INDENT-ON* */ +#define TUN_MAX_PACKET_BYTES 65355 +#define TUN_MIN_PACKET_BYTES 64 +#define TUN_DEFAULT_PACKET_BYTES 1500 + static u32 virtio_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi, u32 flags) @@ -741,6 +745,15 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args) { virtio_set_packet_coalesce (vif); } + if (vif->type == VIRTIO_IF_TYPE_TUN) + { + hw->max_supported_packet_bytes = TUN_MAX_PACKET_BYTES; + hw->min_packet_bytes = hw->min_supported_packet_bytes = + TUN_MIN_PACKET_BYTES; + hw->max_packet_bytes = + args->host_mtu_size ? args->host_mtu_size : TUN_DEFAULT_PACKET_BYTES; + vnet_sw_interface_set_mtu (vnm, hw->sw_if_index, hw->max_packet_bytes); + } virtio_vring_set_rx_queues (vm, vif); |