1/*
2 *  linux/fs/hfs/sysdep.c
3 *
4 * Copyright (C) 1996  Paul H. Hargrove
5 * (C) 2003 Ardis Technologies <roman@ardistech.com>
6 * This file may be distributed under the terms of the GNU General Public License.
7 *
8 * This file contains the code to do various system dependent things.
9 */
10
11#include <linux/namei.h>
12#include "hfs_fs.h"
13
14/* dentry case-handling: just lowercase everything */
15
16static int hfs_revalidate_dentry(struct dentry *dentry, unsigned int flags)
17{
18	struct inode *inode;
19	int diff;
20
21	if (flags & LOOKUP_RCU)
22		return -ECHILD;
23
24	inode = d_inode(dentry);
25	if(!inode)
26		return 1;
27
28	/* fix up inode on a timezone change */
29	diff = sys_tz.tz_minuteswest * 60 - HFS_I(inode)->tz_secondswest;
30	if (diff) {
31		struct timespec64 ts = inode_get_ctime(inode);
32
33		inode_set_ctime(inode, ts.tv_sec + diff, ts.tv_nsec);
34		ts = inode_get_atime(inode);
35		inode_set_atime(inode, ts.tv_sec + diff, ts.tv_nsec);
36		ts = inode_get_mtime(inode);
37		inode_set_mtime(inode, ts.tv_sec + diff, ts.tv_nsec);
38		HFS_I(inode)->tz_secondswest += diff;
39	}
40	return 1;
41}
42
43const struct dentry_operations hfs_dentry_operations =
44{
45	.d_revalidate	= hfs_revalidate_dentry,
46	.d_hash		= hfs_hash_dentry,
47	.d_compare	= hfs_compare_dentry,
48};
49
50