LXR linux/fs/hpfs/dentry.c

   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
  15static int hpfs_hash_dentry(const 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(qstr->name, &l);
  24        /*if (hpfs_chk_name(qstr->name,&l))*/
  25                /*return -ENAMETOOLONG;*/
  26                /*return -ENOENT;*/
  27        x:
  28
  29        hash = init_name_hash(dentry);
  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
  37static int hpfs_compare_dentry(const struct dentry *dentry,
  38                unsigned int len, const char *str, const struct qstr *name)
  39{
  40        unsigned al = len;
  41        unsigned bl = name->len;
  42
  43        hpfs_adjust_length(str, &al);
  44        /*hpfs_adjust_length(b->name, &bl);*/
  45
  46        /*
  47         * 'str' is the nane of an already existing dentry, so the name
  48         * must be valid. 'name' must be validated first.
  49         */
  50
  51        if (hpfs_chk_name(name->name, &bl))
  52                return 1;
  53        if (hpfs_compare_names(dentry->d_sb, str, al, name->name, bl, 0))
  54                return 1;
  55        return 0;
  56}
  57
  58const struct dentry_operations hpfs_dentry_operations = {
  59        .d_hash         = hpfs_hash_dentry,
  60        .d_compare      = hpfs_compare_dentry,
  61};
  62