sysdep.c

 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 inode *dir, const struct qstr *name,
17				 struct dentry *dentry, unsigned int flags)
18{
19	struct inode *inode;
20	int diff;
21
22	if (flags & LOOKUP_RCU)
23		return -ECHILD;
24
25	inode = d_inode(dentry);
26	if(!inode)
27		return 1;
28
29	/* fix up inode on a timezone change */
30	diff = sys_tz.tz_minuteswest * 60 - HFS_I(inode)->tz_secondswest;
31	if (diff) {
32		struct timespec64 ts = inode_get_ctime(inode);
33
34		inode_set_ctime(inode, ts.tv_sec + diff, ts.tv_nsec);
35		ts = inode_get_atime(inode);
36		inode_set_atime(inode, ts.tv_sec + diff, ts.tv_nsec);
37		ts = inode_get_mtime(inode);
38		inode_set_mtime(inode, ts.tv_sec + diff, ts.tv_nsec);
39		HFS_I(inode)->tz_secondswest += diff;
40	}
41	return 1;
42}
43
44const struct dentry_operations hfs_dentry_operations =
45{
46	.d_revalidate	= hfs_revalidate_dentry,
47	.d_hash		= hfs_hash_dentry,
48	.d_compare	= hfs_compare_dentry,
49};
50