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authorDamjan Marion <damarion@cisco.com>2022-01-17 14:49:17 +0100
committerOle Tr�an <otroan@employees.org>2022-01-18 13:20:21 +0000
commit1cd0e5dd533f4209dde453eaa43215e52cd42985 (patch)
tree88ed4b47252cfe27c13ac0f85a6cfc86a7052d5b /src/vnet/ethernet/interface.c
parent49378f206b8e780a898e632f7dd8db912b9b118e (diff)
vnet: distinguish between max_frame_size and MTU
Type: improvement Change-Id: I3659de6599f402c92e3855e3bf0e5e3388f2bea0 Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/vnet/ethernet/interface.c')
-rw-r--r--src/vnet/ethernet/interface.c26
1 files changed, 17 insertions, 9 deletions
diff --git a/src/vnet/ethernet/interface.c b/src/vnet/ethernet/interface.c
index bac882228cb..a0ad7989867 100644
--- a/src/vnet/ethernet/interface.c
+++ b/src/vnet/ethernet/interface.c
@@ -311,15 +311,18 @@ ethernet_mac_change (vnet_hw_interface_t * hi,
}
static clib_error_t *
-ethernet_set_mtu (vnet_main_t *vnm, vnet_hw_interface_t *hi, u32 mtu)
+ethernet_set_max_frame_size (vnet_main_t *vnm, vnet_hw_interface_t *hi,
+ u32 frame_size)
{
ethernet_interface_t *ei =
pool_elt_at_index (ethernet_main.interfaces, hi->hw_instance);
- if (ei->cb.set_mtu)
- return ei->cb.set_mtu (vnm, hi, mtu);
+ if (ei->cb.set_max_frame_size)
+ return ei->cb.set_max_frame_size (vnm, hi, frame_size);
- return 0;
+ return vnet_error (
+ VNET_ERR_UNSUPPORTED,
+ "underlying driver doesn't support changing Max Frame Size");
}
/* *INDENT-OFF* */
@@ -333,7 +336,7 @@ VNET_HW_INTERFACE_CLASS (ethernet_hw_interface_class) = {
.build_rewrite = ethernet_build_rewrite,
.update_adjacency = ethernet_update_adjacency,
.mac_addr_change_function = ethernet_mac_change,
- .set_mtu = ethernet_set_mtu,
+ .set_max_frame_size = ethernet_set_max_frame_size,
};
/* *INDENT-ON* */
@@ -378,10 +381,15 @@ vnet_eth_register_interface (vnet_main_t *vnm,
ethernet_setup_node (vnm->vlib_main, hi->output_node_index);
- hi->min_packet_bytes = hi->min_supported_packet_bytes =
- ETHERNET_MIN_PACKET_BYTES;
- hi->max_supported_packet_bytes = ETHERNET_MAX_PACKET_BYTES;
- hi->max_packet_bytes = em->default_mtu;
+ hi->min_frame_size = ETHERNET_MIN_PACKET_BYTES;
+ hi->frame_overhead =
+ r->frame_overhead ?
+ r->max_frame_size :
+ sizeof (ethernet_header_t) + 2 * sizeof (ethernet_vlan_header_t);
+ hi->max_frame_size = r->max_frame_size ?
+ r->max_frame_size :
+ ethernet_main.default_mtu + hi->frame_overhead;
+ ;
/* Default ethernet MTU, 9000 unless set by ethernet_config see below */
vnet_sw_interface_set_mtu (vnm, hi->sw_if_index, em->default_mtu);