595 if (fd < 0)
596 return fd;
597
598 filp = get_empty_filp();
599 if (!filp) {
600 ret = -ENFILE;
601 goto out_put_fd;
602 }
603
604 user = get_uid(current->user);
605 if (unlikely(atomic_read(&user->inotify_devs) >=
606 inotify_max_user_instances)) {
607 ret = -EMFILE;
608 goto out_free_uid;
609 }
610
611 dev = kmalloc(sizeof(struct inotify_device), GFP_KERNEL);
612 if (unlikely(!dev)) {
613 ret = -ENOMEM;
614 goto out_free_uid;
615 }
616
617 ih = inotify_init(&inotify_user_ops);
618 if (IS_ERR(ih)) {
619 ret = PTR_ERR(ih);
620 goto out_free_dev;
621 }
622 dev->ih = ih;
623 dev->fa = NULL;
624
625 filp->f_op = &inotify_fops;
626 filp->f_path.mnt = mntget(inotify_mnt);
627 filp->f_path.dentry = dget(inotify_mnt->mnt_root);
628 filp->f_mapping = filp->f_path.dentry->d_inode->i_mapping;
629 filp->f_mode = FMODE_READ;
630 filp->f_flags = O_RDONLY | (flags & O_NONBLOCK);
631 filp->private_data = dev;
632
633 INIT_LIST_HEAD(&dev->events);
634 init_waitqueue_head(&dev->wq);
635 mutex_init(&dev->ev_mutex);