From f4364dcfc86df7c1ca47b256eaf6b6d0cdd0d936 Mon Sep 17 00:00:00 2001 From: Sean Young Date: Sun, 27 May 2018 12:24:09 +0100 Subject: media: rc: introduce BPF_PROG_LIRC_MODE2 Add support for BPF_PROG_LIRC_MODE2. This type of BPF program can call rc_keydown() to reported decoded IR scancodes, or rc_repeat() to report that the last key should be repeated. The bpf program can be attached to using the bpf(BPF_PROG_ATTACH) syscall; the target_fd must be the /dev/lircN device. Acked-by: Yonghong Song Signed-off-by: Sean Young Signed-off-by: Daniel Borkmann --- drivers/media/rc/lirc_dev.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) (limited to 'drivers/media/rc/lirc_dev.c') diff --git a/drivers/media/rc/lirc_dev.c b/drivers/media/rc/lirc_dev.c index 24e9fbb80e81..da7013a12a58 100644 --- a/drivers/media/rc/lirc_dev.c +++ b/drivers/media/rc/lirc_dev.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include #include @@ -104,6 +105,12 @@ void ir_lirc_raw_event(struct rc_dev *dev, struct ir_raw_event ev) TO_US(ev.duration), TO_STR(ev.pulse)); } + /* + * bpf does not care about the gap generated above; that exists + * for backwards compatibility + */ + lirc_bpf_run(dev, sample); + spin_lock_irqsave(&dev->lirc_fh_lock, flags); list_for_each_entry(fh, &dev->lirc_fh, list) { if (LIRC_IS_TIMEOUT(sample) && !fh->send_timeout_reports) @@ -816,4 +823,27 @@ void __exit lirc_dev_exit(void) unregister_chrdev_region(lirc_base_dev, RC_DEV_MAX); } +struct rc_dev *rc_dev_get_from_fd(int fd) +{ + struct fd f = fdget(fd); + struct lirc_fh *fh; + struct rc_dev *dev; + + if (!f.file) + return ERR_PTR(-EBADF); + + if (f.file->f_op != &lirc_fops) { + fdput(f); + return ERR_PTR(-EINVAL); + } + + fh = f.file->private_data; + dev = fh->rc; + + get_device(&dev->dev); + fdput(f); + + return dev; +} + MODULE_ALIAS("lirc_dev"); -- cgit v1.2.3