// SPDX-License-Identifier: GPL-2.0

  /*
  * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
  */
  
  #include <linux/nfs_fs.h>
  #include "nfs4_fs.h"

  #include "internal.h"

  
  #define NFSDBG_FACILITY		NFSDBG_CLIENT

  int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool auth_probe)

  {
  	struct nfs_fsinfo fsinfo;
  	int ret = -ENOMEM;

  	fsinfo.fattr = nfs_alloc_fattr();
  	if (fsinfo.fattr == NULL)
  		goto out;
  
  	/* Start by getting the root filehandle from the server */

  	ret = nfs4_proc_get_rootfh(server, mntfh, &fsinfo, auth_probe);

  	if (ret < 0) {
  		dprintk("nfs4_get_rootfh: getroot error = %d
  ", -ret);
  		goto out;
  	}
  
  	if (!(fsinfo.fattr->valid & NFS_ATTR_FATTR_TYPE)
  			|| !S_ISDIR(fsinfo.fattr->mode)) {
  		printk(KERN_ERR "nfs4_get_rootfh:"
  		       " getroot encountered non-directory
  ");
  		ret = -ENOTDIR;
  		goto out;
  	}

  	memcpy(&server->fsid, &fsinfo.fattr->fsid, sizeof(server->fsid));
  out:
  	nfs_free_fattr(fsinfo.fattr);

  	return ret;
  }