... LWN.net FAQ . ... Developers who populate their code with ioctl() implementations or /proc files are often encouraged to create a standalone virtual filesystem instead. ... The task we will undertake is not particularly ambitious: export a simple filesystem (of type "lwnfs") full of counter files. ... static struct dentry *lfs_create_file (struct super_block *sb, struct dentry *dir, const char *name, atomic_t *counter) { struct dentry *dentry; struct inode *inode; struct qstr qname; . ...