1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 */
6
7 #include <linux/nfs_fs.h>
8 #include "nfs4_fs.h"
9 #include "internal.h"
10
11 #define NFSDBG_FACILITY NFSDBG_CLIENT
12
13 int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool auth_probe)
14 {
15 struct nfs_fsinfo fsinfo;
16 int ret = -ENOMEM;
17
18 fsinfo.fattr = nfs_alloc_fattr();
19 if (fsinfo.fattr == NULL)
20 goto out;
21
22 /* Start by getting the root filehandle from the server */
23 ret = nfs4_proc_get_rootfh(server, mntfh, &fsinfo, auth_probe);
24 if (ret < 0) {
25 dprintk("nfs4_get_rootfh: getroot error = %d\n", -ret);
26 goto out;
27 }
28
29 if (!(fsinfo.fattr->valid & NFS_ATTR_FATTR_TYPE)
30 || !S_ISDIR(fsinfo.fattr->mode)) {
31 printk(KERN_ERR "nfs4_get_rootfh:"
32 " getroot encountered non-directory\n");
33 ret = -ENOTDIR;
34 goto out;
35 }
36
37 memcpy(&server->fsid, &fsinfo.fattr->fsid, sizeof(server->fsid));
38 out:
39 nfs_free_fattr(fsinfo.fattr);
40 return ret;
41 }
42
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