From patchwork Fri Mar 4 17:28:38 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Tissoires X-Patchwork-Id: 12769595 X-Patchwork-Delegate: bpf@iogearbox.net 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 32E5EC43219 for ; Fri, 4 Mar 2022 17:33:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241236AbiCDRd6 (ORCPT ); Fri, 4 Mar 2022 12:33:58 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46178 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241234AbiCDRdt (ORCPT ); Fri, 4 Mar 2022 12:33:49 -0500 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 2493333E14 for ; Fri, 4 Mar 2022 09:32:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1646415170; 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=Ux6twZOFT9lb2qTfIZn2kGfR1Z5YetNZFcKf5G8re3c=; b=V2o/Y64/Z/iu0s3iSvY0JMrwHhYddrC0uWnh5xQ9rOwASV4E2gao6le1yZbMS9rBga1Lwu 9PvTqvldTILhaGgLuYHO79pLTrx1KtX+SMqriJnVucNtjKzohSzZvr7fUoH1P0241unKtt 6ty3wvSaIIo+8cebZUwT/Gt7yCZ9EmA= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-452-PycJhc6zM8GUH9sRgyf9ng-1; Fri, 04 Mar 2022 12:32:47 -0500 X-MC-Unique: PycJhc6zM8GUH9sRgyf9ng-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 8702B824FA7; Fri, 4 Mar 2022 17:32:44 +0000 (UTC) Received: from plouf.redhat.com (unknown [10.39.192.55]) by smtp.corp.redhat.com (Postfix) with ESMTP id ABB6786595; Fri, 4 Mar 2022 17:32:40 +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 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, Benjamin Tissoires Subject: [PATCH bpf-next v2 14/28] selftests/bpf: add tests for hid_{get|set}_data helpers Date: Fri, 4 Mar 2022 18:28:38 +0100 Message-Id: <20220304172852.274126-15-benjamin.tissoires@redhat.com> In-Reply-To: <20220304172852.274126-1-benjamin.tissoires@redhat.com> References: <20220304172852.274126-1-benjamin.tissoires@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net Simple test added here, with one use of each helper. Signed-off-by: Benjamin Tissoires --- changes in v2: - split the patch with libbpf left outside. --- tools/testing/selftests/bpf/prog_tests/hid.c | 65 ++++++++++++++++++++ tools/testing/selftests/bpf/progs/hid.c | 45 ++++++++++++++ 2 files changed, 110 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/hid.c b/tools/testing/selftests/bpf/prog_tests/hid.c index 91543b8078ca..74426523dd6f 100644 --- a/tools/testing/selftests/bpf/prog_tests/hid.c +++ b/tools/testing/selftests/bpf/prog_tests/hid.c @@ -297,6 +297,68 @@ static int test_hid_raw_event(struct hid *hid_skel, int uhid_fd, int sysfs_fd) return ret; } +/* + * Attach hid_set_get_data to the given uhid device, + * retrieve and open the matching hidraw node, + * inject one event in the uhid device, + * check that the program makes correct use of bpf_hid_{set|get}_data. + */ +static int test_hid_set_get_data(struct hid *hid_skel, int uhid_fd, int sysfs_fd) +{ + int err, hidraw_ino, hidraw_fd = -1; + char hidraw_path[64] = {0}; + u8 buf[10] = {0}; + int ret = -1; + + /* attach hid_set_get_data program */ + hid_skel->links.hid_set_get_data = + bpf_program__attach_hid(hid_skel->progs.hid_set_get_data, sysfs_fd); + if (!ASSERT_OK_PTR(hid_skel->links.hid_set_get_data, + "attach_hid(hid_set_get_data)")) + return PTR_ERR(hid_skel->links.hid_set_get_data); + + hidraw_ino = get_hidraw(hid_skel->links.hid_set_get_data); + if (!ASSERT_GE(hidraw_ino, 0, "get_hidraw")) + goto cleanup; + + /* open hidraw node to check the other side of the pipe */ + sprintf(hidraw_path, "/dev/hidraw%d", hidraw_ino); + hidraw_fd = open(hidraw_path, O_RDWR | O_NONBLOCK); + + if (!ASSERT_GE(hidraw_fd, 0, "open_hidraw")) + goto cleanup; + + /* 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, 6, "read_hidraw")) + goto cleanup; + + if (!ASSERT_EQ(buf[2], (42 >> 2), "hid_set_get_data")) + goto cleanup; + + if (!ASSERT_EQ(buf[3], 1, "hid_set_get_data")) + goto cleanup; + + if (!ASSERT_EQ(buf[4], 42, "hid_set_get_data")) + goto cleanup; + + ret = 0; + +cleanup: + if (hidraw_fd >= 0) + close(hidraw_fd); + + hid__detach(hid_skel); + + return ret; +} + /* * Attach hid_rdesc_fixup to the given uhid device, * retrieve and open the matching hidraw node, @@ -395,6 +457,9 @@ void serial_test_hid_bpf(void) err = test_hid_raw_event(hid_skel, uhid_fd, sysfs_fd); ASSERT_OK(err, "hid"); + err = test_hid_set_get_data(hid_skel, uhid_fd, sysfs_fd); + ASSERT_OK(err, "hid_set_get_data"); + err = test_rdesc_fixup(hid_skel, uhid_fd, sysfs_fd); ASSERT_OK(err, "hid_rdesc_fixup"); diff --git a/tools/testing/selftests/bpf/progs/hid.c b/tools/testing/selftests/bpf/progs/hid.c index 2270448d0d3f..de6668471940 100644 --- a/tools/testing/selftests/bpf/progs/hid.c +++ b/tools/testing/selftests/bpf/progs/hid.c @@ -66,3 +66,48 @@ int hid_rdesc_fixup(struct hid_bpf_ctx *ctx) return 0; } + +SEC("hid/device_event") +int hid_set_get_data(struct hid_bpf_ctx *ctx) +{ + int ret; + __u8 *buf; + + buf = bpf_ringbuf_reserve(&ringbuf, 8, 0); + if (!buf) + return -12; /* -ENOMEM */ + + /* first try read/write with n > 32 */ + ret = bpf_hid_get_data(ctx, 0, 64, buf, 8); + if (ret < 0) + goto discard; + + /* reinject it */ + ret = bpf_hid_set_data(ctx, 24, 64, buf, 8); + if (ret < 0) + goto discard; + + /* extract data at bit offset 10 of size 4 (half a byte) */ + ret = bpf_hid_get_data(ctx, 10, 4, buf, 8); /* expected to fail */ + if (ret > 0) { + ret = -1; + goto discard; + } + + ret = bpf_hid_get_data(ctx, 10, 4, buf, 4); + if (ret < 0) + goto discard; + + /* reinject it */ + ret = bpf_hid_set_data(ctx, 16, 4, buf, 4); + if (ret < 0) + goto discard; + + ret = 0; + + discard: + + bpf_ringbuf_discard(buf, 0); + + return ret; +}