3354 kernel crash in rpcsec_gss after using gsscred
Reviewed by: Toomas Soome <tsoome@me.com>
Reviewed by: Carlos Neira <cneirabustos@gmail.com>
Approved by: Robert Mustacchi <rm@joyent.com>
re #12783 rb4338 Flow control is needed in rpcmod when the NFS server is unable to keep up with the network

*** 20,29 ****
--- 20,31 ----
   */
  /*
   * Copyright (c) 1983, 2010, Oracle and/or its affiliates. All rights reserved.
   * Copyright (c) 2012 by Delphix. All rights reserved.
   * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
+  * Copyright 2012 Marcel Telka <marcel@telka.sk>
+  * Copyright 2018 OmniOS Community Edition (OmniOSce) Association.
   */
  /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
  /* All Rights Reserved */
  /*
   * Portions of this source code were derived from Berkeley
*** 146,156 ****
          svc_rdma_kgetres,       /* Get pointer to response buffer */
          svc_rdma_kfreeres,      /* Destroy pre-serialized response header */
          svc_rdma_kclone_destroy,        /* Destroy a clone xprt */
          svc_rdma_kstart,        /* Tell `ready-to-receive' to rpcmod */
          svc_rdma_kclone_xprt,   /* Transport specific clone xprt */
!         svc_rdma_ktattrs        /* Get Transport Attributes */
  };
  
  /*
   * Server statistics
   * NOTE: This structure type is duplicated in the NFS fast path.
--- 148,160 ----
          svc_rdma_kgetres,       /* Get pointer to response buffer */
          svc_rdma_kfreeres,      /* Destroy pre-serialized response header */
          svc_rdma_kclone_destroy,        /* Destroy a clone xprt */
          svc_rdma_kstart,        /* Tell `ready-to-receive' to rpcmod */
          svc_rdma_kclone_xprt,   /* Transport specific clone xprt */
!         svc_rdma_ktattrs,       /* Get Transport Attributes */
!         NULL,                   /* Increment transport reference count */
!         NULL                    /* Decrement transport reference count */
  };
  
  /*
   * Server statistics
   * NOTE: This structure type is duplicated in the NFS fast path.