Add a public tap_get_mtu() function, following the same pattern as the existing tap_get_fd(), to allow other subsystems (such as virtio-net) to query a tap netdev's host MTU via its NetClientState without depending on tap-internal headers.
This is a preparatory patch; the function is not yet called from anywhere. Signed-off-by: Nariman Sayed <[email protected]> --- include/net/tap.h | 1 + net/tap.c | 7 +++++++ 2 files changed, 8 insertions(+) diff --git a/include/net/tap.h b/include/net/tap.h index 6f34f13eae..6b478acbfb 100644 --- a/include/net/tap.h +++ b/include/net/tap.h @@ -32,5 +32,6 @@ int tap_enable(NetClientState *nc); int tap_disable(NetClientState *nc); int tap_get_fd(NetClientState *nc); +int tap_get_mtu(NetClientState *nc); #endif /* QEMU_NET_TAP_H */ diff --git a/net/tap.c b/net/tap.c index 57ffb09885..122319d5f3 100644 --- a/net/tap.c +++ b/net/tap.c @@ -379,6 +379,13 @@ int tap_get_fd(NetClientState *nc) return s->fd; } +int tap_get_mtu(NetClientState *nc) +{ + TAPState *s = DO_UPCAST(TAPState, nc, nc); + assert(nc->info->type == NET_CLIENT_DRIVER_TAP); + return tap_fd_get_mtu(s->fd); +} + /* * tap_get_vhost_net() can return NULL if a tap net-device backend is * created with 'vhost=off' option, 'vhostforce=off' or no vhost or -- 2.34.1
