SUNRPC: Fix up backchannel slot table accounting
Add a per-transport maximum limit in the socket case, and add
helpers to allow the NFSv4 code to discover that limit.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index e15cb70..220b799 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -1595,7 +1595,7 @@ bc_svc_process(struct svc_serv *serv, struct rpc_rqst *req,
/* Parse and execute the bc call */
proc_error = svc_process_common(rqstp, argv, resv);
- atomic_inc(&req->rq_xprt->bc_free_slots);
+ atomic_dec(&req->rq_xprt->bc_slot_count);
if (!proc_error) {
/* Processing error: drop the request */
xprt_free_bc_request(req);