From patchwork Fri Mar 18 16:15:20 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Tissoires X-Patchwork-Id: 12785612 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 04607C433F5 for ; Fri, 18 Mar 2022 16:18:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237486AbiCRQTN (ORCPT ); Fri, 18 Mar 2022 12:19:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58964 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238995AbiCRQSi (ORCPT ); Fri, 18 Mar 2022 12:18:38 -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 28B801D7891 for ; Fri, 18 Mar 2022 09:17:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1647620236; 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=MMsWOein3F9RlSJ9iIFQqy8YzC2KAiacG1VeEjo2p8E=; b=VpWtyquCJhZUZZAx51kDj1SSeu5YQFoJZf4KdBM5H8cWJlFqK8hMb9xGD7Z3jdN7XxBtzk EKOJ+DU9l2WiyyRNXnQvXp7o2FZbbn7qHKB5wO97O2HKOIM6Y5oZgL10+EtbJoedJRZjD2 HX2CM0iw67C8YOlX1Mp2kX/OQgZtQrI= 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-591-O2UuoHtVNNKjpEuy8iLloQ-1; Fri, 18 Mar 2022 12:17:10 -0400 X-MC-Unique: O2UuoHtVNNKjpEuy8iLloQ-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 E73563C01B91; Fri, 18 Mar 2022 16:17:09 +0000 (UTC) Received: from plouf.redhat.com (unknown [10.39.192.159]) by smtp.corp.redhat.com (Postfix) with ESMTP id ADD397AD1; Fri, 18 Mar 2022 16:17:05 +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 09/17] selftests/bpf: Add a test for BPF_F_INSERT_HEAD Date: Fri, 18 Mar 2022 17:15:20 +0100 Message-Id: <20220318161528.1531164-10-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: netdev@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net Insert 3 programs to check that we are doing the correct thing: '2', '1', '3' are inserted, but '1' is supposed to be executed first. Signed-off-by: Benjamin Tissoires --- changes in v3: - use the new hid_get_data API new in v2 --- tools/testing/selftests/bpf/prog_tests/hid.c | 80 ++++++++++++++++++++ tools/testing/selftests/bpf/progs/hid.c | 51 +++++++++++++ 2 files changed, 131 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/hid.c b/tools/testing/selftests/bpf/prog_tests/hid.c index 8c8e17e7385f..b8d4dcf20b05 100644 --- a/tools/testing/selftests/bpf/prog_tests/hid.c +++ b/tools/testing/selftests/bpf/prog_tests/hid.c @@ -401,6 +401,83 @@ static int test_hid_raw_event(struct hid *hid_skel, int uhid_fd, int sysfs_fd) return ret; } +/* + * Attach hid_insert{0,1,2} to the given uhid device, + * retrieve and open the matching hidraw node, + * inject one event in the uhid device, + * check that the programs have been inserted in the correct order. + */ +static int test_hid_attach_flags(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_test_insert2 program */ + hid_skel->links.hid_test_insert2 = + bpf_program__attach_hid(hid_skel->progs.hid_test_insert2, sysfs_fd, 0); + if (!ASSERT_OK_PTR(hid_skel->links.hid_test_insert2, + "attach_hid(hid_test_insert2)")) + return PTR_ERR(hid_skel->links.hid_test_insert2); + + /* then attach hid_test_insert1 program before the previous*/ + hid_skel->links.hid_test_insert1 = + bpf_program__attach_hid(hid_skel->progs.hid_test_insert1, + sysfs_fd, + BPF_F_INSERT_HEAD); + if (!ASSERT_OK_PTR(hid_skel->links.hid_test_insert1, + "attach_hid(hid_test_insert1)")) + return PTR_ERR(hid_skel->links.hid_test_insert1); + + /* finally attach hid_test_insert3 at the end */ + hid_skel->links.hid_test_insert3 = + bpf_program__attach_hid(hid_skel->progs.hid_test_insert3, sysfs_fd, 0); + if (!ASSERT_OK_PTR(hid_skel->links.hid_test_insert3, + "attach_hid(hid_test_insert3)")) + return PTR_ERR(hid_skel->links.hid_test_insert3); + + hidraw_ino = get_hidraw(hid_skel->links.hid_test_insert1); + 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; + 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[1], 1, "hid_test_insert1")) + goto cleanup; + + if (!ASSERT_EQ(buf[2], 2, "hid_test_insert2")) + goto cleanup; + + if (!ASSERT_EQ(buf[3], 3, "hid_test_insert3")) + 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, @@ -505,6 +582,9 @@ void serial_test_hid_bpf(void) err = test_hid_raw_event(hid_skel, uhid_fd, sysfs_fd); ASSERT_OK(err, "hid"); + err = test_hid_attach_flags(hid_skel, uhid_fd, sysfs_fd); + ASSERT_OK(err, "hid_user_raw_request"); + /* * 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 c9ce0e36e7b9..390c1bb8d850 100644 --- a/tools/testing/selftests/bpf/progs/hid.c +++ b/tools/testing/selftests/bpf/progs/hid.c @@ -77,3 +77,54 @@ int hid_rdesc_fixup(struct hid_bpf_ctx *ctx) return 0; } + +SEC("hid/device_event") +int hid_test_insert1(struct hid_bpf_ctx *ctx) +{ + __u8 *data = bpf_hid_get_data(ctx, 0 /* offset */, 4 /* size */); + + if (!data) + return 0; /* EPERM check */ + + /* we need to be run first */ + if (data[2] || data[3]) + return -1; + + data[1] = 1; + + return 0; +} + +SEC("hid/device_event") +int hid_test_insert2(struct hid_bpf_ctx *ctx) +{ + __u8 *data = bpf_hid_get_data(ctx, 0 /* offset */, 4 /* size */); + + if (!data) + return 0; /* EPERM check */ + + /* after insert0 and before insert2 */ + if (!data[1] || data[3]) + return -1; + + data[2] = 2; + + return 0; +} + +SEC("hid/device_event") +int hid_test_insert3(struct hid_bpf_ctx *ctx) +{ + __u8 *data = bpf_hid_get_data(ctx, 0 /* offset */, 4 /* size */); + + if (!data) + return 0; /* EPERM check */ + + /* at the end */ + if (!data[1] || !data[2]) + return -1; + + data[3] = 3; + + return 0; +}