kernel/linux.git/tools/testing/selftests/hid/progs, branch v6.4

selftests: hid: attach/detach 2 bpf programs, not just one

2023-01-18T21:08:38+00:00

Add a second BPF program to attach to the device, as the development of this feature showed that we also need to ensure we can detach multiple programs to a device (hid_bpf_link->hid_table_index was actually not set initially, and this lead to any BPF program not being released except for the first one). Signed-off-by: Benjamin Tissoires Signed-off-by: Jiri Kosina

selftests/hid: Add a test for BPF_F_INSERT_HEAD

2022-11-15T15:28:39+00:00

Insert 3 programs to check that we are doing the correct thing: '2', '1', '3' are inserted, but '1' is supposed to be executed first. Signed-off-by: Benjamin Tissoires Signed-off-by: Jiri Kosina

selftests/hid: add report descriptor fixup tests

2022-11-15T15:28:39+00:00

Simple report descriptor override in HID: replace part of the report descriptor from a static definition in the bpf kernel program. Note that this test should be run last because we disconnect/reconnect the device, meaning that it changes the overall uhid device. Signed-off-by: Benjamin Tissoires Signed-off-by: Jiri Kosina

selftests/hid: add tests for bpf_hid_hw_request

2022-11-15T15:28:31+00:00

Add tests for the newly implemented function. We test here only the GET_REPORT part because the other calls are pure HID protocol and won't infer the result of the test of the bpf hook. Signed-off-by: Benjamin Tissoires Signed-off-by: Jiri Kosina

selftests/hid: add test to change the report size

2022-11-15T15:28:30+00:00

Use a different report with a bigger size and ensures we are doing things properly. Signed-off-by: Benjamin Tissoires Signed-off-by: Jiri Kosina

selftests: add tests for the HID-bpf initial implementation

2022-11-15T15:28:29+00:00

The tests are pretty basic: - create a virtual uhid device that no userspace will like (to not mess up the running system) - attach a BPF prog to it - open the matching hidraw node - inject one event and check: * that the BPF program can do something on the event stream * can modify the event stream - add another test where we attach/detach BPF programs to see if we get errors Note: the Makefile is extracted from selftests/bpf so we can rebuild the libbpf and bpftool components from the current kernel tree without relying on system installed components. Signed-off-by: Benjamin Tissoires Signed-off-by: Jiri Kosina