blob: fa27980f2229216c47c2378ce7431f18bd5a793e [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/fs/hpfs/dentry.c
3 *
4 * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
5 *
6 * dcache operations
7 */
8
9#include "hpfs_fn.h"
10
11/*
12 * Note: the dentry argument is the parent dentry.
13 */
14
Linus Torvaldsda53be12013-05-21 15:22:44 -070015static int hpfs_hash_dentry(const struct dentry *dentry, struct qstr *qstr)
Linus Torvalds1da177e2005-04-16 15:20:36 -070016{
17 unsigned long hash;
18 int i;
19 unsigned l = qstr->len;
20
21 if (l == 1) if (qstr->name[0]=='.') goto x;
22 if (l == 2) if (qstr->name[0]=='.' || qstr->name[1]=='.') goto x;
Al Viro7e7742e2010-01-31 17:09:29 -050023 hpfs_adjust_length(qstr->name, &l);
24 /*if (hpfs_chk_name(qstr->name,&l))*/
Linus Torvalds1da177e2005-04-16 15:20:36 -070025 /*return -ENAMETOOLONG;*/
26 /*return -ENOENT;*/
27 x:
28
29 hash = init_name_hash();
30 for (i = 0; i < l; i++)
31 hash = partial_name_hash(hpfs_upcase(hpfs_sb(dentry->d_sb)->sb_cp_table,qstr->name[i]), hash);
32 qstr->hash = end_name_hash(hash);
33
34 return 0;
35}
36
Linus Torvaldsda53be12013-05-21 15:22:44 -070037static int hpfs_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
Nick Piggin621e1552011-01-07 17:49:27 +110038 unsigned int len, const char *str, const struct qstr *name)
Linus Torvalds1da177e2005-04-16 15:20:36 -070039{
Nick Piggin621e1552011-01-07 17:49:27 +110040 unsigned al = len;
41 unsigned bl = name->len;
42
43 hpfs_adjust_length(str, &al);
Al Viro7e7742e2010-01-31 17:09:29 -050044 /*hpfs_adjust_length(b->name, &bl);*/
Nick Piggin621e1552011-01-07 17:49:27 +110045
46 /*
47 * 'str' is the nane of an already existing dentry, so the name
48 * must be valid. 'name' must be validated first.
Linus Torvalds1da177e2005-04-16 15:20:36 -070049 */
50
Nick Piggin621e1552011-01-07 17:49:27 +110051 if (hpfs_chk_name(name->name, &bl))
Al Viro7e7742e2010-01-31 17:09:29 -050052 return 1;
Nick Piggin621e1552011-01-07 17:49:27 +110053 if (hpfs_compare_names(parent->d_sb, str, al, name->name, bl, 0))
Al Viro7e7742e2010-01-31 17:09:29 -050054 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070055 return 0;
56}
57
Al Viro43d344d2011-01-12 16:12:05 -050058const struct dentry_operations hpfs_dentry_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070059 .d_hash = hpfs_hash_dentry,
60 .d_compare = hpfs_compare_dentry,
61};