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
16 static 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
43 const 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
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