From patchwork Fri Mar 18 16:15:21 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Tissoires X-Patchwork-Id: 12785645 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 84B7BC4707A for ; Fri, 18 Mar 2022 16:17:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238834AbiCRQTN (ORCPT ); Fri, 18 Mar 2022 12:19:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59780 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239045AbiCRQSu (ORCPT ); Fri, 18 Mar 2022 12:18:50 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id EC5AD103D88 for ; Fri, 18 Mar 2022 09:17:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1647620251; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=/OVyC0zaH1G/so0ZWrJlP+iwVNUqwQaVb/Gii8MLOPM=; b=TQvnDPY43a8b5idmlsHU9ZiVUQyRcqDIc8kGTlMzwyJ6nUbU3+O1+pd3iWlt9G4f4YDaT3 sPJsbqP2DYxGWHdtAObEjn84S6+TrC/qqsNsoUglAEbaTAgoxRJKWak4jxWErJ/BAwUVhu lo9rwPjUYFGrx13oY+Fv7SHet6dkw3g= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-528-GokVlFHFMx6rNO_pb1c6EA-1; Fri, 18 Mar 2022 12:17:27 -0400 X-MC-Unique: GokVlFHFMx6rNO_pb1c6EA-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id AF68B83396E; Fri, 18 Mar 2022 16:17:26 +0000 (UTC) Received: from plouf.redhat.com (unknown [10.39.192.159]) by smtp.corp.redhat.com (Postfix) with ESMTP id 30DF433250; Fri, 18 Mar 2022 16:17:10 +0000 (UTC) From: Benjamin Tissoires To: Greg KH , Jiri Kosina , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , Shuah Khan , Dave Marchevsky , Joe Stringer , Jonathan Corbet Cc: Tero Kristo , linux-kernel@vger.kernel.org, linux-input@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-doc@vger.kernel.org, Benjamin Tissoires Subject: [PATCH bpf-next v3 10/17] selftests/bpf: add test for user call of HID bpf programs Date: Fri, 18 Mar 2022 17:15:21 +0100 Message-Id: <20220318161528.1531164-11-benjamin.tissoires@redhat.com> In-Reply-To: <20220318161528.1531164-1-benjamin.tissoires@redhat.com> References: <20220318161528.1531164-1-benjamin.tissoires@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.11.54.5 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Add a simple test to see if we can trigger a bpf program of type "hid/user_event". Signed-off-by: Benjamin Tissoires --- changes in v3: - use the new hid_get_data API changes in v2: - split the series by bpf/libbpf/hid/selftests and samples --- tools/testing/selftests/bpf/prog_tests/hid.c | 56 ++++++++++++++++++++ tools/testing/selftests/bpf/progs/hid.c | 15 ++++++ 2 files changed, 71 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/hid.c b/tools/testing/selftests/bpf/prog_tests/hid.c index b8d4dcf20b05..edc3af71e9ed 100644 --- a/tools/testing/selftests/bpf/prog_tests/hid.c +++ b/tools/testing/selftests/bpf/prog_tests/hid.c @@ -478,6 +478,59 @@ static int test_hid_attach_flags(struct hid *hid_skel, int uhid_fd, int sysfs_fd return ret; } +/* + * Attach hid_user to the given uhid device, + * call the bpf program from userspace + * check that the program is called and does the expected. + */ +static int test_hid_user_call(struct hid *hid_skel, int uhid_fd, int sysfs_fd) +{ + int err, prog_fd; + u8 buf[10] = {0}; + int ret = -1; + + LIBBPF_OPTS(bpf_test_run_opts, run_attrs, + .repeat = 1, + .ctx_in = &sysfs_fd, + .ctx_size_in = sizeof(sysfs_fd), + .data_in = buf, + .data_size_in = sizeof(buf), + .data_out = buf, + .data_size_out = sizeof(buf), + ); + + /* attach hid_user program */ + hid_skel->links.hid_user = bpf_program__attach_hid(hid_skel->progs.hid_user, sysfs_fd, 0); + if (!ASSERT_OK_PTR(hid_skel->links.hid_user, + "attach_hid(hid_user)")) + return PTR_ERR(hid_skel->links.hid_user); + + buf[0] = 39; + + prog_fd = bpf_program__fd(hid_skel->progs.hid_user); + + err = bpf_prog_test_run_opts(prog_fd, &run_attrs); + if (!ASSERT_EQ(err, 0, "bpf_prog_test_run_xattr")) + goto cleanup; + + if (!ASSERT_EQ(run_attrs.retval, 72, "bpf_prog_test_run_opts")) + goto cleanup; + + if (!ASSERT_EQ(buf[1], 42, "hid_user_check_in")) + goto cleanup; + + if (!ASSERT_EQ(buf[2], 4, "hid_user_check_static_out")) + goto cleanup; + + ret = 0; + +cleanup: + + hid__detach(hid_skel); + + return ret; +} + /* * Attach hid_rdesc_fixup to the given uhid device, * retrieve and open the matching hidraw node, @@ -585,6 +638,9 @@ void serial_test_hid_bpf(void) err = test_hid_attach_flags(hid_skel, uhid_fd, sysfs_fd); ASSERT_OK(err, "hid_user_raw_request"); + err = test_hid_user_call(hid_skel, uhid_fd, sysfs_fd); + ASSERT_OK(err, "hid_user"); + /* * this test should be run last because we disconnect/reconnect * the device, meaning that it changes the overall uhid device diff --git a/tools/testing/selftests/bpf/progs/hid.c b/tools/testing/selftests/bpf/progs/hid.c index 390c1bb8d850..fbdbe9d1b605 100644 --- a/tools/testing/selftests/bpf/progs/hid.c +++ b/tools/testing/selftests/bpf/progs/hid.c @@ -128,3 +128,18 @@ int hid_test_insert3(struct hid_bpf_ctx *ctx) return 0; } + +SEC("hid/user_event") +int hid_user(struct hid_bpf_ctx *ctx) +{ + __u8 *data = bpf_hid_get_data(ctx, 0 /* offset */, 3 /* size */); + + if (!data) + return 0; /* EPERM check */ + + data[1] = data[0] + 3; + data[2] = 4; + ctx->retval = 72; + + return 0; +}