diff options
| author | Benjamin Tissoires <bentiss@kernel.org> | 2024-06-26 15:46:28 +0200 |
|---|---|---|
| committer | Benjamin Tissoires <bentiss@kernel.org> | 2024-06-27 11:00:45 +0200 |
| commit | 9286675a2aed40a517be8cc4e283a04f473275b5 (patch) | |
| tree | 9d32d1f847856d770a8c7374cc278ea91b6dbb73 /include/linux/hid.h | |
| parent | 015a4a2a439b285943da471d38b2721bbe4d8b39 (diff) | |
HID: bpf: add HID-BPF hooks for hid_hw_output_report
Same story than hid_hw_raw_requests:
This allows to intercept and prevent or change the behavior of
hid_hw_output_report() from a bpf program.
The intent is to solve a couple of use case:
- firewalling a HID device: a firewall can monitor who opens the hidraw
nodes and then prevent or allow access to write operations on that
hidraw node.
- change the behavior of a device and emulate a new HID feature request
The hook is allowed to be run as sleepable so it can itself call
hid_hw_output_report(), which allows to "convert" one feature request into
another or even call the feature request on a different HID device on the
same physical device.
Link: https://patch.msgid.link/20240626-hid_hw_req_bpf-v2-7-cfd60fb6c79f@kernel.org
Acked-by: Jiri Kosina <jkosina@suse.com>
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
Diffstat (limited to 'include/linux/hid.h')
| -rw-r--r-- | include/linux/hid.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/hid.h b/include/linux/hid.h index 24d0d7c0bd33..1533c9dcd3a6 100644 --- a/include/linux/hid.h +++ b/include/linux/hid.h @@ -1130,7 +1130,8 @@ int __hid_hw_raw_request(struct hid_device *hdev, size_t len, enum hid_report_type rtype, enum hid_class_request reqtype, __u64 source, bool from_bpf); -int __hid_hw_output_report(struct hid_device *hdev, __u8 *buf, size_t len, __u64 source); +int __hid_hw_output_report(struct hid_device *hdev, __u8 *buf, size_t len, __u64 source, + bool from_bpf); int hid_hw_raw_request(struct hid_device *hdev, unsigned char reportnum, __u8 *buf, size_t len, enum hid_report_type rtype, |