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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.

 */

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(dentry->d_sb->s_hpfs_cp_table,qstr->name[i]), hash);

        qstr->hash = end_name_hash(hash);

        return 0;

}

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;

}

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;

}