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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/devices/af_packet/af_packet.c
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/devices/af_packet/af_packet.c')
-rw-r--r--src/vnet/devices/af_packet/af_packet.c37
1 files changed, 16 insertions, 21 deletions
diff --git a/src/vnet/devices/af_packet/af_packet.c b/src/vnet/devices/af_packet/af_packet.c
index cf32e92c94c..cf4f91e2fcd 100644
--- a/src/vnet/devices/af_packet/af_packet.c
+++ b/src/vnet/devices/af_packet/af_packet.c
@@ -56,31 +56,26 @@ unsigned int if_nametoindex (const char *ifname);
typedef struct tpacket_req tpacket_req_t;
-static u32
-af_packet_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi,
- u32 flags)
+static clib_error_t *
+af_packet_eth_set_mtu (vnet_main_t *vnm, vnet_hw_interface_t *hi, u32 mtu)
{
- clib_error_t *error;
+ clib_error_t *error, *rv;
af_packet_main_t *apm = &af_packet_main;
- af_packet_if_t *apif =
- pool_elt_at_index (apm->interfaces, hi->dev_instance);
+ af_packet_if_t *apif = pool_elt_at_index (apm->interfaces, hi->dev_instance);
- if (flags == ETHERNET_INTERFACE_FLAG_MTU)
- {
- error =
- vnet_netlink_set_link_mtu (apif->host_if_index, hi->max_packet_bytes);
+ error = vnet_netlink_set_link_mtu (apif->host_if_index, mtu);
- if (error)
- {
- vlib_log_err (apm->log_class, "netlink failed to change MTU: %U",
- format_clib_error, error);
- clib_error_free (error);
- return VNET_API_ERROR_SYSCALL_ERROR_1;
- }
- else
- apif->host_mtu = hi->max_packet_bytes;
+ if (error)
+ {
+ vlib_log_err (apm->log_class, "netlink failed to change MTU: %U",
+ format_clib_error, error);
+ rv = vnet_error (VNET_ERR_SYSCALL_ERROR_1, "netlink error: %U",
+ format_clib_error, error);
+ clib_error_free (error);
+ return rv;
}
-
+ else
+ apif->host_mtu = mtu;
return 0;
}
@@ -403,7 +398,7 @@ af_packet_create_if (af_packet_create_if_arg_t *arg)
eir.dev_class_index = af_packet_device_class.index;
eir.dev_instance = if_index;
eir.address = hw_addr;
- eir.cb.flag_change = af_packet_eth_flag_change;
+ eir.cb.set_mtu = af_packet_eth_set_mtu;
apif->hw_if_index = vnet_eth_register_interface (vnm, &eir);
}
else