From patchwork Wed May 18 20:59:17 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Tissoires X-Patchwork-Id: 574721 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 37E68C433EF for ; Wed, 18 May 2022 21:01:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242931AbiERVBS (ORCPT ); Wed, 18 May 2022 17:01:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59402 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242974AbiERVAW (ORCPT ); Wed, 18 May 2022 17:00:22 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id CDF4F255591 for ; Wed, 18 May 2022 14:00:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1652907619; 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=tEF+66qA0wUsA595/mSAmCFMMreNnzteme04lvAe/m8=; b=Z0AJJfnScmDURFBDYmXQ5G9DVRAVbTo6i/tmtI6v0mHWOeCLf4gDtg2RMGqjQY/WX69rWK HtgBGMg3IpFMYVCgIhGBnHobXUy3vycjTsH8V+KgDPEwILB/KaO+iwfJ1OYm3eIGvS3b4z YG1F1GqWBj3S8WbjZWgGgasn6Sg+Pfc= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-381-flzaXyZLOFOsu1bS3crdLA-1; Wed, 18 May 2022 17:00:16 -0400 X-MC-Unique: flzaXyZLOFOsu1bS3crdLA-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id E83131D96CAB; Wed, 18 May 2022 21:00:14 +0000 (UTC) Received: from plouf.redhat.com (unknown [10.39.192.58]) by smtp.corp.redhat.com (Postfix) with ESMTP id 87F7A2166B25; Wed, 18 May 2022 21:00:10 +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 v5 10/17] selftests/bpf/hid: add test to change the report size Date: Wed, 18 May 2022 22:59:17 +0200 Message-Id: <20220518205924.399291-11-benjamin.tissoires@redhat.com> In-Reply-To: <20220518205924.399291-1-benjamin.tissoires@redhat.com> References: <20220518205924.399291-1-benjamin.tissoires@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.78 on 10.11.54.6 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Use a different report with a bigger size and ensures we are doing things properly. Signed-off-by: Benjamin Tissoires --- new in v5 --- tools/testing/selftests/bpf/prog_tests/hid.c | 60 ++++++++++++++++++++ tools/testing/selftests/bpf/progs/hid.c | 15 ++++- 2 files changed, 74 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/prog_tests/hid.c b/tools/testing/selftests/bpf/prog_tests/hid.c index 719d220c8d86..47bc0a30c275 100644 --- a/tools/testing/selftests/bpf/prog_tests/hid.c +++ b/tools/testing/selftests/bpf/prog_tests/hid.c @@ -17,6 +17,17 @@ static unsigned char rdesc[] = { 0xa1, 0x01, /* COLLECTION (Application) */ 0x09, 0x01, /* Usage (Vendor Usage 0x01) */ 0xa1, 0x00, /* COLLECTION (Physical) */ + 0x85, 0x02, /* REPORT_ID (2) */ + 0x19, 0x01, /* USAGE_MINIMUM (1) */ + 0x29, 0x08, /* USAGE_MAXIMUM (3) */ + 0x15, 0x00, /* LOGICAL_MINIMUM (0) */ + 0x25, 0xff, /* LOGICAL_MAXIMUM (255) */ + 0x95, 0x08, /* REPORT_COUNT (8) */ + 0x75, 0x08, /* REPORT_SIZE (8) */ + 0x81, 0x02, /* INPUT (Data,Var,Abs) */ + 0xc0, /* END_COLLECTION */ + 0x09, 0x01, /* Usage (Vendor Usage 0x01) */ + 0xa1, 0x00, /* COLLECTION (Physical) */ 0x85, 0x01, /* REPORT_ID (1) */ 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */ 0x19, 0x01, /* USAGE_MINIMUM (1) */ @@ -635,6 +646,53 @@ static int test_attach_detach(int uhid_fd, int dev_id) return ret; } +/* + * Attach hid_change_report_id to the given uhid device, + * retrieve and open the matching hidraw node, + * inject one event in the uhid device, + * check that the program sees it and can change the data + */ +static int test_hid_change_report(int uhid_fd, int dev_id) +{ + struct test_params params; + int err, hidraw_fd = -1; + u8 buf[10] = {0}; + int ret = -1; + + err = prep_test(dev_id, "hid_change_report_id", ¶ms); + if (!ASSERT_EQ(err, 0, "prep_test(hid_change_report_id)")) + goto cleanup; + + hidraw_fd = params.hidraw_fd; + + /* inject one event */ + buf[0] = 1; + buf[1] = 42; + send_event(uhid_fd, buf, 6); + + /* read the data from hidraw */ + memset(buf, 0, sizeof(buf)); + err = read(hidraw_fd, buf, sizeof(buf)); + if (!ASSERT_EQ(err, 9, "read_hidraw")) + goto cleanup; + + if (!ASSERT_EQ(buf[0], 2, "hid_change_report_id")) + goto cleanup; + + if (!ASSERT_EQ(buf[1], 42, "hid_change_report_id")) + goto cleanup; + + if (!ASSERT_EQ(buf[2], 0, "leftovers_from_previous_test")) + goto cleanup; + + ret = 0; + +cleanup: + cleanup_test(¶ms); + + return ret; +} + void serial_test_hid_bpf(void) { int err, uhid_fd; @@ -660,6 +718,8 @@ void serial_test_hid_bpf(void) ASSERT_OK(err, "hid"); err = test_attach_detach(uhid_fd, dev_id); ASSERT_OK(err, "hid_attach_detach"); + err = test_hid_change_report(uhid_fd, dev_id); + ASSERT_OK(err, "hid_change_report"); destroy(uhid_fd); diff --git a/tools/testing/selftests/bpf/progs/hid.c b/tools/testing/selftests/bpf/progs/hid.c index fc0a4241643a..ee7529c47ad8 100644 --- a/tools/testing/selftests/bpf/progs/hid.c +++ b/tools/testing/selftests/bpf/progs/hid.c @@ -32,7 +32,20 @@ int BPF_PROG(hid_first_event, struct hid_bpf_ctx *hid_ctx) rw_data[2] = rw_data[1] + 5; - return 0; + return hid_ctx->size; +} + +SEC("?fmod_ret/hid_bpf_device_event") +int BPF_PROG(hid_change_report_id, struct hid_bpf_ctx *hid_ctx) +{ + __u8 *rw_data = hid_bpf_get_data(hid_ctx, 0 /* offset */, 3 /* size */); + + if (!rw_data) + return 0; /* EPERM check */ + + rw_data[0] = 2; + + return 9; } SEC("syscall")