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authorDamjan Marion <damarion@cisco.com>2022-01-06 21:14:08 +0100
committerDamjan Marion <damarion@cisco.com>2022-01-17 12:41:24 +0100
commit88a9c0e02ab919cadd4e035133995a6afb4d1c32 (patch)
tree15741e8bbe6c9d7077fa2a62b6ac369a17836cfb /src/vnet/ethernet
parent81bb6fc611d321a92ad2218e1b852db67980768a (diff)
interface: improve MTU handling
- per hw-interface-class handlers - ethernet set_mtu callback - driver can now refuse MTU change Type: improvement Change-Id: I3d37c9129930ebec7bb70caf4263025413873048 Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/vnet/ethernet')
-rw-r--r--src/vnet/ethernet/ethernet.h7
-rw-r--r--src/vnet/ethernet/interface.c19
2 files changed, 19 insertions, 7 deletions
diff --git a/src/vnet/ethernet/ethernet.h b/src/vnet/ethernet/ethernet.h
index 9621429e4ee..b6adeb6f44d 100644
--- a/src/vnet/ethernet/ethernet.h
+++ b/src/vnet/ethernet/ethernet.h
@@ -130,7 +130,11 @@ typedef u32 (ethernet_flag_change_function_t)
typedef struct
{
+ /* ethernet interface flags change */
ethernet_flag_change_function_t *flag_change;
+
+ /* set MTU callback */
+ vnet_interface_set_mtu_function_t *set_mtu;
} vnet_eth_if_callbacks_t;
#define ETHERNET_MIN_PACKET_BYTES 64
@@ -166,9 +170,6 @@ typedef struct ethernet_interface
/* Set interface to accept all packets (promiscuous mode). */
#define ETHERNET_INTERFACE_FLAG_ACCEPT_ALL 1
- /* Change MTU on interface from hw interface structure */
-#define ETHERNET_INTERFACE_FLAG_MTU 2
-
/* Callback, e.g. to turn on/off promiscuous mode */
vnet_eth_if_callbacks_t cb;
diff --git a/src/vnet/ethernet/interface.c b/src/vnet/ethernet/interface.c
index b1513a79774..bac882228cb 100644
--- a/src/vnet/ethernet/interface.c
+++ b/src/vnet/ethernet/interface.c
@@ -310,6 +310,18 @@ ethernet_mac_change (vnet_hw_interface_t * hi,
return (NULL);
}
+static clib_error_t *
+ethernet_set_mtu (vnet_main_t *vnm, vnet_hw_interface_t *hi, u32 mtu)
+{
+ 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);
+
+ return 0;
+}
+
/* *INDENT-OFF* */
VNET_HW_INTERFACE_CLASS (ethernet_hw_interface_class) = {
.name = "Ethernet",
@@ -321,6 +333,7 @@ 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,
};
/* *INDENT-ON* */
@@ -367,8 +380,8 @@ vnet_eth_register_interface (vnet_main_t *vnm,
hi->min_packet_bytes = hi->min_supported_packet_bytes =
ETHERNET_MIN_PACKET_BYTES;
- hi->max_packet_bytes = hi->max_supported_packet_bytes =
- ETHERNET_MAX_PACKET_BYTES;
+ hi->max_supported_packet_bytes = ETHERNET_MAX_PACKET_BYTES;
+ hi->max_packet_bytes = em->default_mtu;
/* Default ethernet MTU, 9000 unless set by ethernet_config see below */
vnet_sw_interface_set_mtu (vnm, hi->sw_if_index, em->default_mtu);
@@ -460,8 +473,6 @@ ethernet_set_flags (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
/* fall through */
case ETHERNET_INTERFACE_FLAG_ACCEPT_ALL:
ei->flags &= ~ETHERNET_INTERFACE_FLAG_STATUS_L3;
- /* fall through */
- case ETHERNET_INTERFACE_FLAG_MTU:
return ei->cb.flag_change (vnm, hi, opn_flags);
default:
return ~0;