Largely inspired from hid_bpf.c for the fixture setup.
Create a couple of tests for hidraw: - create a uhid device and check if the fixture is working properly - inject one uhid event and read it through hidraw
These tests are not that useful for now, but will be once we start adding the ioctl and BPFs to revoke the hidraw node.
Signed-off-by: Benjamin Tissoires bentiss@kernel.org Reviewed-by: Peter Hutterer peter.hutterer@who-t.net
---
new in v4
Changes to v4: - dropped the common code in favor of hid_common.h --- tools/testing/selftests/hid/.gitignore | 1 + tools/testing/selftests/hid/Makefile | 2 +- tools/testing/selftests/hid/hidraw.c | 90 ++++++++++++++++++++++++++++++++++ 3 files changed, 92 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/hid/.gitignore b/tools/testing/selftests/hid/.gitignore index 995af0670f69..746c62361f77 100644 --- a/tools/testing/selftests/hid/.gitignore +++ b/tools/testing/selftests/hid/.gitignore @@ -2,4 +2,5 @@ bpftool *.skel.h /tools hid_bpf +hidraw results diff --git a/tools/testing/selftests/hid/Makefile b/tools/testing/selftests/hid/Makefile index 2b5ea18bde38..72be55ac4bdf 100644 --- a/tools/testing/selftests/hid/Makefile +++ b/tools/testing/selftests/hid/Makefile @@ -32,7 +32,7 @@ CFLAGS += -Wno-unused-command-line-argument endif
# Order correspond to 'make run_tests' order -TEST_GEN_PROGS = hid_bpf +TEST_GEN_PROGS = hid_bpf hidraw
# Emit succinct information message describing current building step # $1 - generic step name (e.g., CC, LINK, etc); diff --git a/tools/testing/selftests/hid/hidraw.c b/tools/testing/selftests/hid/hidraw.c new file mode 100644 index 000000000000..37372709130c --- /dev/null +++ b/tools/testing/selftests/hid/hidraw.c @@ -0,0 +1,90 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2022-2024 Red Hat */ + +#include "hid_common.h" + +FIXTURE(hidraw) { + int dev_id; + int uhid_fd; + int hidraw_fd; + int hid_id; + pthread_t tid; +}; +static void close_hidraw(FIXTURE_DATA(hidraw) * self) +{ + if (self->hidraw_fd) + close(self->hidraw_fd); + self->hidraw_fd = 0; +} + +FIXTURE_TEARDOWN(hidraw) { + void *uhid_err; + + uhid_destroy(_metadata, self->uhid_fd); + + close_hidraw(self); + pthread_join(self->tid, &uhid_err); +} +#define TEARDOWN_LOG(fmt, ...) do { \ + TH_LOG(fmt, ##__VA_ARGS__); \ + hidraw_teardown(_metadata, self, variant); \ +} while (0) + +FIXTURE_SETUP(hidraw) +{ + time_t t; + int err; + + /* initialize random number generator */ + srand((unsigned int)time(&t)); + + self->dev_id = rand() % 1024; + + self->uhid_fd = setup_uhid(_metadata, self->dev_id); + + /* locate the uev, self, variant);ent file of the created device */ + self->hid_id = get_hid_id(self->dev_id); + ASSERT_GT(self->hid_id, 0) + TEARDOWN_LOG("Could not locate uhid device id: %d", self->hid_id); + + err = uhid_start_listener(_metadata, &self->tid, self->uhid_fd); + ASSERT_EQ(0, err) TEARDOWN_LOG("could not start udev listener: %d", err); + + self->hidraw_fd = open_hidraw(self->dev_id); + ASSERT_GE(self->hidraw_fd, 0) TH_LOG("open_hidraw"); +} + +/* + * A simple test to see if the fixture is working fine. + * If this fails, none of the other tests will pass. + */ +TEST_F(hidraw, test_create_uhid) +{ +} + +/* + * Inject one event in the uhid device, + * check that we get the same data through hidraw + */ +TEST_F(hidraw, raw_event) +{ + __u8 buf[10] = {0}; + int err; + + /* inject one event */ + buf[0] = 1; + buf[1] = 42; + uhid_send_event(_metadata, self->uhid_fd, buf, 6); + + /* read the data from hidraw */ + memset(buf, 0, sizeof(buf)); + err = read(self->hidraw_fd, buf, sizeof(buf)); + ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); + ASSERT_EQ(buf[0], 1); + ASSERT_EQ(buf[1], 42); +} + +int main(int argc, char **argv) +{ + return test_harness_run(argc, argv); +}