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, 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 37 static 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 58 const struct dentry_operations hpfs_dentry_operations = { 59 .d_hash = hpfs_hash_dentry, 60 .d_compare = hpfs_compare_dentry, 61 }; 62