4.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Parthasarathy Bhuvaragan parthasarathy.bhuvaragan@ericsson.com
[ Upstream commit 92ef12b32feab8f277b69e9fb89ede2796777f4d ]
In the case of implicit connect message with data > 1K, the flow control accounting is incorrect. At this state, the socket does not know the peer nodes capability and falls back to legacy flow control by return 1, however the receiver of this message will perform the new block accounting. This leads to a slack and eventually traffic disturbance.
In this commit, we perform tipc_node_get_capabilities() at implicit connect and perform accounting based on the peer's capability.
Signed-off-by: Parthasarathy Bhuvaragan parthasarathy.bhuvaragan@ericsson.com Signed-off-by: Jon Maloy jon.maloy@ericsson.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/tipc/socket.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/net/tipc/socket.c +++ b/net/tipc/socket.c @@ -1063,8 +1063,10 @@ static int __tipc_sendstream(struct sock /* Handle implicit connection setup */ if (unlikely(dest)) { rc = __tipc_sendmsg(sock, m, dlen); - if (dlen && (dlen == rc)) + if (dlen && dlen == rc) { + tsk->peer_caps = tipc_node_get_capabilities(net, dnode); tsk->snt_unacked = tsk_inc(tsk, dlen + msg_hdr_sz(hdr)); + } return rc; }