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Linux/fs/hpfs/dentry.c

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  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 
 15 static int hpfs_hash_dentry(const struct dentry *dentry, const struct inode *inode,
 16                 struct qstr *qstr)
 17 {
 18         unsigned long    hash;
 19         int              i;
 20         unsigned l = qstr->len;
 21 
 22         if (l == 1) if (qstr->name[0]=='.') goto x;
 23         if (l == 2) if (qstr->name[0]=='.' || qstr->name[1]=='.') goto x;
 24         hpfs_adjust_length(qstr->name, &l);
 25         /*if (hpfs_chk_name(qstr->name,&l))*/
 26                 /*return -ENAMETOOLONG;*/
 27                 /*return -ENOENT;*/
 28         x:
 29 
 30         hash = init_name_hash();
 31         for (i = 0; i < l; i++)
 32                 hash = partial_name_hash(hpfs_upcase(hpfs_sb(dentry->d_sb)->sb_cp_table,qstr->name[i]), hash);
 33         qstr->hash = end_name_hash(hash);
 34 
 35         return 0;
 36 }
 37 
 38 static int hpfs_compare_dentry(const struct dentry *parent,
 39                 const struct inode *pinode,
 40                 const struct dentry *dentry, const struct inode *inode,
 41                 unsigned int len, const char *str, const struct qstr *name)
 42 {
 43         unsigned al = len;
 44         unsigned bl = name->len;
 45 
 46         hpfs_adjust_length(str, &al);
 47         /*hpfs_adjust_length(b->name, &bl);*/
 48 
 49         /*
 50          * 'str' is the nane of an already existing dentry, so the name
 51          * must be valid. 'name' must be validated first.
 52          */
 53 
 54         if (hpfs_chk_name(name->name, &bl))
 55                 return 1;
 56         if (hpfs_compare_names(parent->d_sb, str, al, name->name, bl, 0))
 57                 return 1;
 58         return 0;
 59 }
 60 
 61 const struct dentry_operations hpfs_dentry_operations = {
 62         .d_hash         = hpfs_hash_dentry,
 63         .d_compare      = hpfs_compare_dentry,
 64 };
 65 

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