Re: [PATCH bpf-next v2 12/28] bpf/hid: add hid_{get|set}_data helpers

On Fri, Mar 04, 2022 at 06:28:36PM +0100, Benjamin Tissoires wrote:

When we process an incoming HID report, it is common to have to account
for fields that are not aligned in the report. HID is using 2 helpers
hid_field_extract() and implement() to pick up any data at any offset
within the report.

Export those 2 helpers in BPF programs so users can also rely on them.
The second net worth advantage of those helpers is that now we can
fetch data anywhere in the report without knowing at compile time the
location of it. The boundary checks are done in hid-bpf.c, to prevent
a memory leak.

Signed-off-by: Benjamin Tissoires <redacted>

Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>