From patchwork Tue Aug 27 08:19:32 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Tissoires X-Patchwork-Id: 822917 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 61299199FB9; Tue, 27 Aug 2024 08:19:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724746794; cv=none; b=cB4rX69Nx2dC41lDu+M3pnNOOiaHc/JGi3TdO97lQxYsogsy2PRvgTgSjLl171j1AcjR3Vgn/AVjWgBofSmib9c1RDoLKeD6I1aWqrGxlqCeDCwXMN63kCNGg/QqUhKXcF7HgVf3nY62iuusqvEmM2M1qk3xAZwBEhwREYyy+yw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724746794; c=relaxed/simple; bh=pst73USFY2/jm8Z3YTbF5rFAbRivyaR41QfG2nVz0AQ=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=ZRBGiw1F7aflo0uYWbYorBaVo8Y9x+73WahPu36IN6YEyWkRuRRPcTZk9NuIcsLMYfXcELmi02B3hVyh45/rzVk4p8kRefeSoBuNRJVseV3Q9u5m1N6PxdEH1S84Ko5pw+zSlob+MTRr0QWL+rV20JzPxg4kA3KzKgV/gmReWQ4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ow24/vp5; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ow24/vp5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 94983C5812F; Tue, 27 Aug 2024 08:19:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1724746793; bh=pst73USFY2/jm8Z3YTbF5rFAbRivyaR41QfG2nVz0AQ=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=ow24/vp5ZCtwo0XpdwB0Y9vL3oKSdwvdNzJgXloLGSDGYKmYLNPmwJ8/J2xlNK4t0 k8yzCpYEV6x/Ery+H/COfa4KeND/ifqyAzZcTPyHnrcDOsGmAQZcNlq4ujQ//d0y+p qa1iRLWWkWQqkseRVwsiwrJcxNxz/NDxYWZC9Iwr6ACCY32sR5XaGV0n5L4Z+jyrFF XZbqypArH3/Jj0akhCoUQUttgcaLO96o62kIUl9ArZTyozb8xOujn5wQ86B2/QaD0q PV1cUw8yBSxJpsvERQZUlmRvAavwCmMA6DafQv+Vn0FSmyRrUNejLFZCibXKpO76o9 H0Nx7sItz/zPw== From: Benjamin Tissoires Date: Tue, 27 Aug 2024 17:19:32 +0900 Subject: [PATCH v5 4/4] selftests/hid: Add HIDIOCREVOKE tests Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240827-hidraw-revoke-v5-4-d004a7451aea@kernel.org> References: <20240827-hidraw-revoke-v5-0-d004a7451aea@kernel.org> In-Reply-To: <20240827-hidraw-revoke-v5-0-d004a7451aea@kernel.org> To: Jiri Kosina , Shuah Khan , Peter Hutterer Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Benjamin Tissoires X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1724746785; l=5102; i=bentiss@kernel.org; s=20230215; h=from:subject:message-id; bh=pst73USFY2/jm8Z3YTbF5rFAbRivyaR41QfG2nVz0AQ=; b=y3sUHaueIxVekOt4kgazqknNXdrYHIWgk1jscsc3h2ewTkzvw1IWUyaKLIEYM6K0dHVA4MOEM /8PheCYWlTgC9cWUOAGPWLjYbJ7Y0mhcd5ZxGV6wGX+15pAO6RCcktf X-Developer-Key: i=bentiss@kernel.org; a=ed25519; pk=7D1DyAVh6ajCkuUTudt/chMuXWIJHlv2qCsRkIizvFw= Add 4 tests for the new revoke ioctl, for read/write/ioctl and poll. Signed-off-by: Benjamin Tissoires Reviewed-by: Peter Hutterer --- new in v4 Changes to v4: - fix a few error messages - also check for ENODEV errno when required - use ENODEV instead of its plain value --- tools/testing/selftests/hid/hidraw.c | 147 +++++++++++++++++++++++++++++++++++ 1 file changed, 147 insertions(+) diff --git a/tools/testing/selftests/hid/hidraw.c b/tools/testing/selftests/hid/hidraw.c index 37372709130c..f8b4f7ff292c 100644 --- a/tools/testing/selftests/hid/hidraw.c +++ b/tools/testing/selftests/hid/hidraw.c @@ -3,6 +3,11 @@ #include "hid_common.h" +/* for older kernels */ +#ifndef HIDIOCREVOKE +#define HIDIOCREVOKE _IOW('H', 0x0D, int) /* Revoke device access */ +#endif /* HIDIOCREVOKE */ + FIXTURE(hidraw) { int dev_id; int uhid_fd; @@ -84,6 +89,148 @@ TEST_F(hidraw, raw_event) ASSERT_EQ(buf[1], 42); } +/* + * After initial opening/checks of hidraw, revoke the hidraw + * node and check that we can not read any more data. + */ +TEST_F(hidraw, raw_event_revoked) +{ + __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); + + /* call the revoke ioctl */ + err = ioctl(self->hidraw_fd, HIDIOCREVOKE, NULL); + ASSERT_OK(err) TH_LOG("couldn't revoke the hidraw fd"); + + /* inject one other event */ + buf[0] = 1; + buf[1] = 43; + 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, -1) TH_LOG("read_hidraw"); + ASSERT_EQ(errno, ENODEV) TH_LOG("unexpected error code while reading the hidraw node: %d", + errno); +} + +/* + * Revoke the hidraw node and check that we can not do any ioctl. + */ +TEST_F(hidraw, ioctl_revoked) +{ + int err, desc_size = 0; + + /* call the revoke ioctl */ + err = ioctl(self->hidraw_fd, HIDIOCREVOKE, NULL); + ASSERT_OK(err) TH_LOG("couldn't revoke the hidraw fd"); + + /* do an ioctl */ + err = ioctl(self->hidraw_fd, HIDIOCGRDESCSIZE, &desc_size); + ASSERT_EQ(err, -1) TH_LOG("ioctl_hidraw"); + ASSERT_EQ(errno, ENODEV) TH_LOG("unexpected error code while doing an ioctl: %d", + errno); +} + +/* + * Setup polling of the fd, and check that revoke works properly. + */ +TEST_F(hidraw, poll_revoked) +{ + struct pollfd pfds[1]; + __u8 buf[10] = {0}; + int err, ready; + + /* setup polling */ + pfds[0].fd = self->hidraw_fd; + pfds[0].events = POLLIN; + + /* inject one event */ + buf[0] = 1; + buf[1] = 42; + uhid_send_event(_metadata, self->uhid_fd, buf, 6); + + while (true) { + ready = poll(pfds, 1, 5000); + ASSERT_EQ(ready, 1) TH_LOG("poll return value"); + + if (pfds[0].revents & POLLIN) { + 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); + + /* call the revoke ioctl */ + err = ioctl(self->hidraw_fd, HIDIOCREVOKE, NULL); + ASSERT_OK(err) TH_LOG("couldn't revoke the hidraw fd"); + } else { + break; + } + } + + ASSERT_TRUE(pfds[0].revents & POLLHUP); +} + +/* + * After initial opening/checks of hidraw, revoke the hidraw + * node and check that we can not read any more data. + */ +TEST_F(hidraw, write_event_revoked) +{ + struct timespec time_to_wait; + __u8 buf[10] = {0}; + int err; + + /* inject one event from hidraw */ + buf[0] = 1; /* report ID */ + buf[1] = 2; + buf[2] = 42; + + pthread_mutex_lock(&uhid_output_mtx); + + memset(output_report, 0, sizeof(output_report)); + clock_gettime(CLOCK_REALTIME, &time_to_wait); + time_to_wait.tv_sec += 2; + + err = write(self->hidraw_fd, buf, 3); + ASSERT_EQ(err, 3) TH_LOG("unexpected error while writing to hidraw node: %d", err); + + err = pthread_cond_timedwait(&uhid_output_cond, &uhid_output_mtx, &time_to_wait); + ASSERT_OK(err) TH_LOG("error while calling waiting for the condition"); + + ASSERT_EQ(output_report[0], 1); + ASSERT_EQ(output_report[1], 2); + ASSERT_EQ(output_report[2], 42); + + /* call the revoke ioctl */ + err = ioctl(self->hidraw_fd, HIDIOCREVOKE, NULL); + ASSERT_OK(err) TH_LOG("couldn't revoke the hidraw fd"); + + /* inject one other event */ + buf[0] = 1; + buf[1] = 43; + err = write(self->hidraw_fd, buf, 3); + ASSERT_LT(err, 0) TH_LOG("unexpected success while writing to hidraw node: %d", err); + ASSERT_EQ(errno, ENODEV) TH_LOG("unexpected error code while writing to hidraw node: %d", + errno); + + pthread_mutex_unlock(&uhid_output_mtx); +} + int main(int argc, char **argv) { return test_harness_run(argc, argv);