tipc: introduce flow control for group broadcast messages
We introduce an end-to-end flow control mechanism for group broadcast
messages. This ensures that no messages are ever lost because of
destination receive buffer overflow, with minimal impact on performance.
For now, the algorithm is based on the assumption that there is only one
active transmitter at any moment in time.
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/tipc/msg.h b/net/tipc/msg.h
index 1b527b1..237d007 100644
--- a/net/tipc/msg.h
+++ b/net/tipc/msg.h
@@ -538,6 +538,7 @@ static inline void msg_set_nameupper(struct tipc_msg *m, u32 n)
*/
#define GRP_JOIN_MSG 0
#define GRP_LEAVE_MSG 1
+#define GRP_ADV_MSG 2
/*
* Word 1
@@ -790,12 +791,12 @@ static inline void msg_set_conn_ack(struct tipc_msg *m, u32 n)
msg_set_bits(m, 9, 16, 0xffff, n);
}
-static inline u32 msg_adv_win(struct tipc_msg *m)
+static inline u16 msg_adv_win(struct tipc_msg *m)
{
return msg_bits(m, 9, 0, 0xffff);
}
-static inline void msg_set_adv_win(struct tipc_msg *m, u32 n)
+static inline void msg_set_adv_win(struct tipc_msg *m, u16 n)
{
msg_set_bits(m, 9, 0, 0xffff, n);
}