1 files changed, 15 insertions, 0 deletions

diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index f4a509a925b5..b252401c8601 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -919,3 +919,18 @@ err_bad:
         svc_putnl(resv, ntohl(rpc_stat));
         goto sendit;
 }
+
+/*
+ * Return (transport-specific) limit on the rpc payload.
+ */
+u32 svc_max_payload(const struct svc_rqst *rqstp)
+{
+        int max = RPCSVC_MAXPAYLOAD_TCP;
+
+        if (rqstp->rq_sock->sk_sock->type == SOCK_DGRAM)
+                max = RPCSVC_MAXPAYLOAD_UDP;
+        if (rqstp->rq_server->sv_bufsz < max)
+                max = rqstp->rq_server->sv_bufsz;
+        return max;
+}
+EXPORT_SYMBOL_GPL(svc_max_payload);