| 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 | static const struct dentry_operations hpfs_dentry_operations = { |
| 62 | .d_hash = hpfs_hash_dentry, |
| 63 | .d_compare = hpfs_compare_dentry, |
| 64 | }; |
| 65 | |
| 66 | void hpfs_set_dentry_operations(struct dentry *dentry) |
| 67 | { |
| 68 | dentry->d_op = &hpfs_dentry_operations; |
| 69 | } |