From patchwork Fri Jun 2 19:02:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rhys Rustad-Elliott X-Patchwork-Id: 13265758 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 6B05BC7EE29 for ; Fri, 2 Jun 2023 19:02:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237106AbjFBTCy (ORCPT ); Fri, 2 Jun 2023 15:02:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55342 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235724AbjFBTCx (ORCPT ); Fri, 2 Jun 2023 15:02:53 -0400 Received: from mail-4317.proton.ch (mail-4317.proton.ch [185.70.43.17]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ECA851B6; Fri, 2 Jun 2023 12:02:48 -0700 (PDT) Date: Fri, 02 Jun 2023 19:02:24 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rhysre.net; s=protonmail2; t=1685732566; x=1685991766; bh=4ec16uhnfS31YjPYD7pz+sF1nQMEnJwmSUYIRDWmsKc=; h=Date:From:Cc:Subject:Message-ID:In-Reply-To:References: Feedback-ID:From:To:Cc:Date:Subject:Reply-To:Feedback-ID: Message-ID:BIMI-Selector; b=oa+ilQO0Hz/kxS+6P69EG/R6Efg2aA4N2HNQgDNQnxIBeSrx7D2+S9NFmSiTXXP3b 7OdfvU8+elkP7Wjrdait0sQGKrWGfES6FQ6ZPydT60wYdCzFXYmAOHwMA7fX1uF8IM 61n9gawXlVdjlFXK+YaK93fomM51ZCCfWELdjGsGHwNgd+fdaPIgQE1KSfSlgi0U1O VgYcHtFo97+rbf0zyj8FHHfmtsA44AN8gyccpzC7AXyicCjBOZ/q9FpLS+NrU3Ke2I TTlaNUh6cO3wMpMbdqqFuJEgPllBafktBsXNdYMgrihsCun07UcI4Th8SSK3ne3VnE UN/yI+9pDqChA== From: Rhys Rustad-Elliott Cc: Rhys Rustad-Elliott , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Mykola Lysenko , Shuah Khan , linux-kernel@vger.kernel.org, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH bpf v2 2/2] selftests/bpf: Add access_inner_map selftest Message-ID: <20230602190110.47068-3-me@rhysre.net> In-Reply-To: <20230602190110.47068-1-me@rhysre.net> References: <20230602190110.47068-1-me@rhysre.net> Feedback-ID: 51368404:user:proton MIME-Version: 1.0 To: unlisted-recipients:; (no To-header on input) Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Add a selftest that accesses a BPF_MAP_TYPE_ARRAY (at a nonzero index) nested within a BPF_MAP_TYPE_HASH_OF_MAPS to flex a previously buggy case. Signed-off-by: Rhys Rustad-Elliott --- .../bpf/prog_tests/inner_array_lookup.c | 31 +++++++++++++ .../bpf/progs/test_inner_array_lookup.c | 45 +++++++++++++++++++ 2 files changed, 76 insertions(+) create mode 100644 tools/testing/selftests/bpf/prog_tests/inner_array_lookup.c create mode 100644 tools/testing/selftests/bpf/progs/test_inner_array_lookup.c diff --git a/tools/testing/selftests/bpf/prog_tests/inner_array_lookup.c b/tools/testing/selftests/bpf/prog_tests/inner_array_lookup.c new file mode 100644 index 000000000000..29d4d0067c60 --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/inner_array_lookup.c @@ -0,0 +1,31 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include + +#include "test_inner_array_lookup.skel.h" + +void test_inner_array_lookup(void) +{ + int map1_fd, err; + int key = 3; + int val = 1; + struct test_inner_array_lookup *skel; + + skel = test_inner_array_lookup__open_and_load(); + if (!ASSERT_TRUE(skel != NULL, "open_load_skeleton")) + return; + + err = test_inner_array_lookup__attach(skel); + if (!ASSERT_TRUE(err == 0, "skeleton_attach")) + goto cleanup; + + map1_fd = bpf_map__fd(skel->maps.inner_map1); + bpf_map_update_elem(map1_fd, &key, &val, 0); + + /* Probe should have set the element at index 3 to 2 */ + bpf_map_lookup_elem(map1_fd, &key, &val); + ASSERT_TRUE(val == 2, "value_is_2"); + +cleanup: + test_inner_array_lookup__destroy(skel); +} diff --git a/tools/testing/selftests/bpf/progs/test_inner_array_lookup.c b/tools/testing/selftests/bpf/progs/test_inner_array_lookup.c new file mode 100644 index 000000000000..c2c8f2fa451d --- /dev/null +++ b/tools/testing/selftests/bpf/progs/test_inner_array_lookup.c @@ -0,0 +1,45 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include +#include + +struct inner_map { + __uint(type, BPF_MAP_TYPE_ARRAY); + __uint(max_entries, 5); + __type(key, int); + __type(value, int); +} inner_map1 SEC(".maps"); + +struct outer_map { + __uint(type, BPF_MAP_TYPE_HASH_OF_MAPS); + __uint(max_entries, 3); + __type(key, int); + __array(values, struct inner_map); +} outer_map1 SEC(".maps") = { + .values = { + [2] = &inner_map1, + }, +}; + +SEC("raw_tp/sys_enter") +int handle__sys_enter(void *ctx) +{ + int outer_key = 2, inner_key = 3; + int *val; + void *map; + + map = bpf_map_lookup_elem(&outer_map1, &outer_key); + if (!map) + return 1; + + val = bpf_map_lookup_elem(map, &inner_key); + if (!val) + return 1; + + if (*val == 1) + *val = 2; + + return 0; +} + +char _license[] SEC("license") = "GPL";