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/*
* linux/fs/hpfs/dentry.c
*
* Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
*
* dcache operations
*/
#include "hpfs_fn.h"
/*
* Note: the dentry argument is the parent dentry.
*/
static int hpfs_hash_dentry(struct dentry *dentry, struct qstr *qstr)
{
unsigned long hash;
int i;
unsigned l = qstr->len;
if (l == 1) if (qstr->name[0]=='.') goto x;
if (l == 2) if (qstr->name[0]=='.' || qstr->name[1]=='.') goto x;
hpfs_adjust_length((char *)qstr->name, &l);
/*if (hpfs_chk_name((char *)qstr->name,&l))*/
/*return -ENAMETOOLONG;*/
/*return -ENOENT;*/
x:
hash = init_name_hash();
for (i = 0; i < l; i++)
hash = partial_name_hash(hpfs_upcase(hpfs_sb(dentry->d_sb)->sb_cp_table,qstr->name[i]), hash);
qstr->hash = end_name_hash(hash);
return 0;
}
static int hpfs_compare_dentry(struct dentry *dentry, struct qstr *a, struct qstr *b)
{
unsigned al=a->len;
unsigned bl=b->len;
hpfs_adjust_length((char *)a->name, &al);
/*hpfs_adjust_length((char *)b->name, &bl);*/
/* 'a' is the qstr of an already existing dentry, so the name
* must be valid. 'b' must be validated first.
*/
if (hpfs_chk_name((char *)b->name, &bl)) return 1;
if (hpfs_compare_names(dentry->d_sb, (char *)a->name, al, (char *)b->name, bl, 0)) return 1;
return 0;
}
static const struct dentry_operations hpfs_dentry_operations = {
.d_hash = hpfs_hash_dentry,
.d_compare = hpfs_compare_dentry,
};
void hpfs_set_dentry_operations(struct dentry *dentry)
{
dentry->d_op = &hpfs_dentry_operations;
}
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