[PATCH] RPC: add a release_rqst callout to the RPC transport switch

 The final place where congestion control state is adjusted is in
 xprt_release, where each request is finally released.  Add a callout
 there to allow transports to perform additional processing when a
 request is about to be released.

 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>

1 files changed, 1 insertions, 0 deletions

diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 980f26504f48..6c2f5dcea416 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -1059,6 +1059,7 @@ static struct rpc_xprt_ops xs_udp_ops = {
         .send_request           = xs_udp_send_request,
         .set_retrans_timeout    = xprt_set_retrans_timeout_rtt,
         .timer                  = xs_udp_timer,
+        .release_request        = xprt_release_rqst_cong,
         .close                  = xs_close,
         .destroy                = xs_destroy,
 };