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
nfs4_get_rootfh(struct nfs_server * server,struct nfs_fh * mntfh,bool auth_probe)13 int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool auth_probe)
14 {
15 struct nfs_fattr *fattr = nfs_alloc_fattr();
16 int ret = -ENOMEM;
17
18 if (fattr == NULL)
19 goto out;
20
21 /* Start by getting the root filehandle from the server */
22 ret = nfs4_proc_get_rootfh(server, mntfh, fattr, auth_probe);
23 if (ret < 0) {
24 dprintk("nfs4_get_rootfh: getroot error = %d\n", -ret);
25 goto out;
26 }
27
28 if (!(fattr->valid & NFS_ATTR_FATTR_TYPE) || !S_ISDIR(fattr->mode)) {
29 printk(KERN_ERR "nfs4_get_rootfh:"
30 " getroot encountered non-directory\n");
31 ret = -ENOTDIR;
32 goto out;
33 }
34
35 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
36 out:
37 nfs_free_fattr(fattr);
38 return ret;
39 }
40