svc: Add a max payload value to the transport

The svc_max_payload function currently looks at the socket type
to determine the max payload. Add a max payload value to svc_xprt_class
so it can be returned directly.

Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
Acked-by: Neil Brown <neilb@suse.de>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Greg Banks <gnb@sgi.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

3 files changed, 4 insertions, 3 deletions

diff --git a/include/linux/sunrpc/svc_xprt.h b/include/linux/sunrpc/svc_xprt.h
index fe8e787bb95d..187dc4e2e202 100644
--- a/include/linux/sunrpc/svc_xprt.h
+++ b/include/linux/sunrpc/svc_xprt.h
@@ -17,6 +17,7 @@ struct svc_xprt_class {
         struct module           *xcl_owner;
         struct svc_xprt_ops     *xcl_ops;
         struct list_head        xcl_list;
+        u32                     xcl_max_payload;
 };
 
 struct svc_xprt {
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index 4ad5fbbb18b4..94eed9b80038 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -1055,10 +1055,8 @@ err_bad:
  */
 u32 svc_max_payload(const struct svc_rqst *rqstp)
 {
-        int max = RPCSVC_MAXPAYLOAD_TCP;
+        u32 max = rqstp->rq_xprt->xpt_class->xcl_max_payload;
 
-        if (rqstp->rq_sock->sk_sock->type == SOCK_DGRAM)
-                max = RPCSVC_MAXPAYLOAD_UDP;
         if (rqstp->rq_server->sv_max_payload < max)
                 max = rqstp->rq_server->sv_max_payload;
         return max;
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 54f1b3d993a6..c507f6f8ee54 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -906,6 +906,7 @@ static struct svc_xprt_ops svc_udp_ops = {
 static struct svc_xprt_class svc_udp_class = {
         .xcl_name = "udp",
         .xcl_ops = &svc_udp_ops,
+        .xcl_max_payload = RPCSVC_MAXPAYLOAD_UDP,
 };
 
 static void
@@ -1359,6 +1360,7 @@ static struct svc_xprt_ops svc_tcp_ops = {
 static struct svc_xprt_class svc_tcp_class = {
         .xcl_name = "tcp",
         .xcl_ops = &svc_tcp_ops,
+        .xcl_max_payload = RPCSVC_MAXPAYLOAD_TCP,
 };
 
 void svc_init_xprt_sock(void)