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authorChuck Lever <cel@netapp.com>2005-08-25 16:25:52 -0700
committerTrond Myklebust <Trond.Myklebust@netapp.com>2005-09-23 12:38:41 -0400
commit46c0ee8bc4ad3743de05e8b8b20201df44dcb6d3 (patch)
tree6b2993ff1cefb69cc3cc40c3605d088ea2af3c98 /net/sunrpc/xprtsock.c
parent49e9a89086b3cae784a4868ca852863e4f4ea3fe (diff)
[PATCH] RPC: separate xprt_timer implementations
Allow transports to hook the retransmit timer interrupt. Some transports calculate their congestion window here so that a retransmit timeout has immediate effect on the congestion window. Test-plan: Use WAN simulation to cause sporadic bursty packet loss. Look for significant regression in performance or client stability. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net/sunrpc/xprtsock.c')
-rw-r--r--net/sunrpc/xprtsock.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 8589c1ad55e..c3658ff027a 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -860,6 +860,17 @@ static void xs_tcp_set_buffer_size(struct rpc_xprt *xprt)
return;
}
+/**
+ * xs_udp_timer - called when a retransmit timeout occurs on a UDP transport
+ * @task: task that timed out
+ *
+ * Adjust the congestion window after a retransmit timeout has occurred.
+ */
+static void xs_udp_timer(struct rpc_task *task)
+{
+ xprt_adjust_cwnd(task, -ETIMEDOUT);
+}
+
static int xs_bindresvport(struct rpc_xprt *xprt, struct socket *sock)
{
struct sockaddr_in myaddr = {
@@ -1050,6 +1061,7 @@ static struct rpc_xprt_ops xs_udp_ops = {
.connect = xs_connect,
.send_request = xs_udp_send_request,
.set_retrans_timeout = xprt_set_retrans_timeout_rtt,
+ .timer = xs_udp_timer,
.close = xs_close,
.destroy = xs_destroy,
};