1/*
2* Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
3* Written by David Howells (dhowells@redhat.com)
4*/
5
6#include <linux/nfs_fs.h>
7#include "nfs4_fs.h"
8#include "internal.h"
9
10#define NFSDBG_FACILITY		NFSDBG_CLIENT
11
12int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool auth_probe)
13{
14	struct nfs_fsinfo fsinfo;
15	int ret = -ENOMEM;
16
17	dprintk("--> nfs4_get_rootfh()\n");
18
19	fsinfo.fattr = nfs_alloc_fattr();
20	if (fsinfo.fattr == NULL)
21		goto out;
22
23	/* Start by getting the root filehandle from the server */
24	ret = nfs4_proc_get_rootfh(server, mntfh, &fsinfo, auth_probe);
25	if (ret < 0) {
26		dprintk("nfs4_get_rootfh: getroot error = %d\n", -ret);
27		goto out;
28	}
29
30	if (!(fsinfo.fattr->valid & NFS_ATTR_FATTR_TYPE)
31			|| !S_ISDIR(fsinfo.fattr->mode)) {
32		printk(KERN_ERR "nfs4_get_rootfh:"
33		       " getroot encountered non-directory\n");
34		ret = -ENOTDIR;
35		goto out;
36	}
37
38	if (fsinfo.fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) {
39		printk(KERN_ERR "nfs4_get_rootfh:"
40		       " getroot obtained referral\n");
41		ret = -EREMOTE;
42		goto out;
43	}
44
45	memcpy(&server->fsid, &fsinfo.fattr->fsid, sizeof(server->fsid));
46out:
47	nfs_free_fattr(fsinfo.fattr);
48	dprintk("<-- nfs4_get_rootfh() = %d\n", ret);
49	return ret;
50}
51