int kfs_permission(struct inode *inode, int mode, struct nameidata *nd);
/* dentry_operations */
int kfs_d_revalidate(struct dentry *dir, struct nameidata *nd);
-int kfs_d_hash(struct dentry *dentry, struct qstr *name);
int kfs_d_compare(struct dentry *dir, struct qstr *name1, struct qstr *name2);
int kfs_d_delete(struct dentry *dentry);
int kfs_d_release(struct dentry *dentry);