1 /*
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
hpfs_hash_dentry(struct dentry * dentry,struct qstr * qstr)15 int hpfs_hash_dentry(struct dentry *dentry, struct qstr *qstr)
16 {
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;
23 hpfs_adjust_length((char *)qstr->name, &l);
24 /*if (hpfs_chk_name((char *)qstr->name,&l))*/
25 /*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(dentry->d_sb->s_hpfs_cp_table,qstr->name[i]), hash);
32 qstr->hash = end_name_hash(hash);
33
34 return 0;
35 }
36
hpfs_compare_dentry(struct dentry * dentry,struct qstr * a,struct qstr * b)37 int hpfs_compare_dentry(struct dentry *dentry, struct qstr *a, struct qstr *b)
38 {
39 unsigned al=a->len;
40 unsigned bl=b->len;
41 hpfs_adjust_length((char *)a->name, &al);
42 /*hpfs_adjust_length((char *)b->name, &bl);*/
43 /* 'a' is the qstr of an already existing dentry, so the name
44 * must be valid. 'b' must be validated first.
45 */
46
47 if (hpfs_chk_name((char *)b->name, &bl)) return 1;
48 if (hpfs_compare_names(dentry->d_sb, (char *)a->name, al, (char *)b->name, bl, 0)) return 1;
49 return 0;
50 }
51
52 struct dentry_operations hpfs_dentry_operations = {
53 d_hash: hpfs_hash_dentry,
54 d_compare: hpfs_compare_dentry,
55 };
56
hpfs_set_dentry_operations(struct dentry * dentry)57 void hpfs_set_dentry_operations(struct dentry *dentry)
58 {
59 dentry->d_op = &hpfs_dentry_operations;
60 }
61