tipc: introduce jumbo frame support for broadcast
Until now, we have only been supporting a fix MTU size of 1500 bytes
for all broadcast media, irrespective of their actual capability.
We now make the broadcast MTU adaptable to the carrying media, i.e.,
we use the smallest MTU supported by any of the interfaces attached
to TIPC.
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c
index 74ee09a..d8c399d 100644
--- a/net/tipc/bcast.c
+++ b/net/tipc/bcast.c
@@ -148,9 +148,9 @@
tipc_sk_mcast_rcv(net, &tn->bcbase->arrvq, &tn->bcbase->inputq);
}
-uint tipc_bcast_get_mtu(void)
+int tipc_bcast_get_mtu(struct net *net)
{
- return MAX_PKT_DEFAULT_MCAST;
+ return tipc_link_mtu(tipc_bc_sndlink(net));
}
static u16 bcbuf_acks(struct sk_buff *skb)
@@ -175,7 +175,7 @@
{
struct tipc_bc_base *bb = tipc_bc_base(net);
int all_dests = tipc_link_bc_peers(bb->link);
- int i;
+ int i, mtu;
bb->primary_bearer = INVALID_BEARER_ID;
@@ -183,6 +183,13 @@
return;
for (i = 0; i < MAX_BEARERS; i++) {
+ if (!bb->dests[i])
+ continue;
+
+ mtu = tipc_bearer_mtu(net, i);
+ if (mtu < tipc_link_mtu(bb->link))
+ tipc_link_set_mtu(bb->link, mtu);
+
if (bb->dests[i] < all_dests)
continue;
@@ -1220,7 +1227,7 @@
bb->node.net = net;
if (!tipc_link_bc_create(&bb->node, 0, 0,
- MAX_PKT_DEFAULT_MCAST,
+ U16_MAX,
BCLINK_WIN_DEFAULT,
0,
&bb->inputq,