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authorMatthew Smith <mgsmith@netgate.com>2020-07-24 13:38:03 -0500
committerMatthew Smith <mgsmith@netgate.com>2020-11-05 17:41:01 +0000
commitbd50ed18de83493b119e67897a5fa9ba9c7e763e (patch)
tree6cce31f5795f25c34bf7badfbfec5152a3d67ca0 /src/vnet/devices/virtio
parentd4a547144ffc0f68538d5a89ce7d41cd739a33d2 (diff)
tap: allow change of carrier state on host
Type: feature Add a function to adjust the link state of the host side of a tap interface. If an application (e.g. route protocol daemons) running on the host uses netlink to monitor interface state, a plugin could use this function to communicate a loss of connectivity to the application by making the interface appear to go down. Requires a somewhat recent kernel. E.g. it does not have any effect on CentOS 7 but it works on CentOS 8. Change-Id: I677ee7889d2eb142e2395bea98f0b4d7e7e7f810 Signed-off-by: Matthew Smith <mgsmith@netgate.com>
Diffstat (limited to 'src/vnet/devices/virtio')
-rw-r--r--src/vnet/devices/virtio/virtio.c1
-rw-r--r--src/vnet/devices/virtio/virtio.h1
2 files changed, 2 insertions, 0 deletions
diff --git a/src/vnet/devices/virtio/virtio.c b/src/vnet/devices/virtio/virtio.c
index 8209a46b52f..925ad092b91 100644
--- a/src/vnet/devices/virtio/virtio.c
+++ b/src/vnet/devices/virtio/virtio.c
@@ -345,6 +345,7 @@ virtio_show (vlib_main_t * vm, u32 * hw_if_indices, u8 show_descr, u32 type)
if (type == VIRTIO_IF_TYPE_TAP)
vlib_cli_output (vm, " host-mac-addr: %U",
format_ethernet_address, vif->host_mac_addr);
+ vlib_cli_output (vm, " host-carrier-up: %u", vif->host_carrier_up);
vec_foreach_index (i, vif->vhost_fds)
str = format (str, " %d", vif->vhost_fds[i]);
diff --git a/src/vnet/devices/virtio/virtio.h b/src/vnet/devices/virtio/virtio.h
index 86660a1f933..fda72365db9 100644
--- a/src/vnet/devices/virtio/virtio.h
+++ b/src/vnet/devices/virtio/virtio.h
@@ -169,6 +169,7 @@ typedef struct
ip4_address_t host_ip4_addr;
u8 host_ip4_prefix_len;
u8 host_ip6_prefix_len;
+ u8 host_carrier_up; /* host tun/tap driver link carrier state */
};
struct /* native virtio */
{