SUNRPC: Add a callback to initialise server requests

Add a callback to help initialise server requests before they are
processed. This will allow us to clean up the NFS server version
support, and to make it container safe.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

fs/nfsd/nfssvc.c

@@ -86,6 +86,7 @@ static struct svc_program	nfsd_acl_program = {
 	.pg_class		= "nfsd",
 	.pg_stats		= &nfsd_acl_svcstats,
 	.pg_authenticate	= &svc_set_client,
+	.pg_init_request	= svc_generic_init_request,
 };
 
 static struct svc_stat	nfsd_acl_svcstats = {
@@ -118,6 +119,7 @@ struct svc_program		nfsd_program = {
 	.pg_class		= "nfsd",		/* authentication class */
 	.pg_stats		= &nfsd_svcstats,	/* version table */
 	.pg_authenticate	= &svc_set_client,	/* export authentication */
+	.pg_init_request	= svc_generic_init_request,
 
 };