From 445d892f43e6a6031cd1aac292df433f821aa830 Mon Sep 17 00:00:00 2001 From: "Michael S. Tsirkin" Date: Fri, 16 Jul 2010 11:16:06 +0300 Subject: tap: add APIs for vnet header length Add APIs to control host header length. First user will be vhost-net. Signed-off-by: Michael S. Tsirkin --- net/tap.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'net/tap.c') diff --git a/net/tap.c b/net/tap.c index 2866ff40e8..4afb314fde 100644 --- a/net/tap.c +++ b/net/tap.c @@ -232,6 +232,27 @@ int tap_has_vnet_hdr(VLANClientState *nc) return !!s->host_vnet_hdr_len; } +int tap_has_vnet_hdr_len(VLANClientState *nc, int len) +{ + TAPState *s = DO_UPCAST(TAPState, nc, nc); + + assert(nc->info->type == NET_CLIENT_TYPE_TAP); + + return tap_probe_vnet_hdr_len(s->fd, len); +} + +void tap_set_vnet_hdr_len(VLANClientState *nc, int len) +{ + TAPState *s = DO_UPCAST(TAPState, nc, nc); + + assert(nc->info->type == NET_CLIENT_TYPE_TAP); + assert(len == sizeof(struct virtio_net_hdr_mrg_rxbuf) || + len == sizeof(struct virtio_net_hdr)); + + tap_fd_set_vnet_hdr_len(s->fd, len); + s->host_vnet_hdr_len = len; +} + void tap_using_vnet_hdr(VLANClientState *nc, int using_vnet_hdr) { TAPState *s = DO_UPCAST(TAPState, nc, nc); -- cgit v1.2.1