Merge tag 'efi-fixes-for-v6.1-4' of git://git.kernel.org/pub/scm/linux/kernel/git...
[platform/kernel/linux-starfive.git] / fs / nfs / nfs4getroot.c
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 }