// 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_fattr *fattr = nfs_alloc_fattr();
        int ret = -ENOMEM;

        if (fattr == NULL)
                goto out;

        /* Start by getting the root filehandle from the server */
        ret = nfs4_proc_get_rootfh(server, mntfh, fattr, auth_probe);
        if (ret < 0) {
                dprintk("nfs4_get_rootfh: getroot error = %d\n", -ret);
                goto out;
        }

        if (!(fattr->valid & NFS_ATTR_FATTR_TYPE) || !S_ISDIR(fattr->mode)) {
                printk(KERN_ERR "nfs4_get_rootfh:"
                       " getroot encountered non-directory\n");
                ret = -ENOTDIR;
                goto out;
        }

        memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
out:
        nfs_free_fattr(fattr);
        return ret;
}