From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D9062C433FF for ; Wed, 7 Aug 2019 20:49:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AFF422173C for ; Wed, 7 Aug 2019 20:49:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=fb.com header.i=@fb.com header.b="hLgg2vYF" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389599AbfHGUt3 (ORCPT ); Wed, 7 Aug 2019 16:49:29 -0400 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:64048 "EHLO mx0b-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389590AbfHGUt0 (ORCPT ); Wed, 7 Aug 2019 16:49:26 -0400 Received: from pps.filterd (m0109331.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x77Kcdun017651 for ; Wed, 7 Aug 2019 13:49:25 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=facebook; bh=lFDlsCFhy4mlD7Q0koIbBu65FWY8EncNVgC2oNP6XN8=; b=hLgg2vYFg7P7lXwPFZbyvKuao+lTQPjxTExnbD/qjRUeHm5rk/gJA39yFMncGbAxF+HN 1hgG+OQDXvELk0ZiKFVrNipgmAvtJJFY+ggH2BP3InrEz2uMd0Uva+o+ogJW1xmqBpRV IC+Bjg90Pz74HCkCkHm03Fg3AzBqFSltTlo= Received: from mail.thefacebook.com (mailout.thefacebook.com [199.201.64.23]) by mx0a-00082601.pphosted.com with ESMTP id 2u84250dv2-6 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT) for ; Wed, 07 Aug 2019 13:49:25 -0700 Received: from mx-out.facebook.com (2620:10d:c081:10::13) by mail.thefacebook.com (2620:10d:c081:35::127) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA) id 15.1.1713.5; Wed, 7 Aug 2019 13:49:18 -0700 Received: by dev101.prn2.facebook.com (Postfix, from userid 137359) id 95D2186167B; Wed, 7 Aug 2019 13:49:14 -0700 (PDT) Smtp-Origin-Hostprefix: dev From: Andrii Nakryiko Smtp-Origin-Hostname: dev101.prn2.facebook.com To: , , , , CC: , , Andrii Nakryiko Smtp-Origin-Cluster: prn2c23 Subject: [PATCH v5 bpf-next 14/14] selftests/bpf: add CO-RE relocs misc tests Date: Wed, 7 Aug 2019 13:48:43 -0700 Message-ID: <20190807204843.513594-15-andriin@fb.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190807204843.513594-1-andriin@fb.com> References: <20190807204843.513594-1-andriin@fb.com> X-FB-Internal: Safe MIME-Version: 1.0 Content-Type: text/plain X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-08-07_06:,, signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 priorityscore=1501 malwarescore=0 suspectscore=67 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1908070179 X-FB-Internal: deliver Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Add tests validating few edge-cases of capturing offset relocations. Signed-off-by: Andrii Nakryiko --- .../selftests/bpf/prog_tests/core_reloc.c | 19 +++++++ .../bpf/progs/btf__core_reloc_misc.c | 5 ++ .../selftests/bpf/progs/core_reloc_types.h | 25 ++++++++ .../bpf/progs/test_core_reloc_misc.c | 57 +++++++++++++++++++ 4 files changed, 106 insertions(+) create mode 100644 tools/testing/selftests/bpf/progs/btf__core_reloc_misc.c create mode 100644 tools/testing/selftests/bpf/progs/test_core_reloc_misc.c diff --git a/tools/testing/selftests/bpf/prog_tests/core_reloc.c b/tools/testing/selftests/bpf/prog_tests/core_reloc.c index 251ef8c518f0..f3863f976a48 100644 --- a/tools/testing/selftests/bpf/prog_tests/core_reloc.c +++ b/tools/testing/selftests/bpf/prog_tests/core_reloc.c @@ -260,6 +260,25 @@ static struct core_reloc_test_case test_cases[] = { INTS_ERR_CASE(ints___err_wrong_sz_16), INTS_ERR_CASE(ints___err_wrong_sz_32), INTS_ERR_CASE(ints___err_wrong_sz_64), + + /* validate edge cases of capturing relocations */ + { + .case_name = "misc", + .bpf_obj_file = "test_core_reloc_misc.o", + .btf_src_file = "btf__core_reloc_misc.o", + .input = (const char *)&(struct core_reloc_misc_extensible[]){ + { .a = 1 }, + { .a = 2 }, /* not read */ + { .a = 3 }, + }, + .input_len = 4 * sizeof(int), + .output = STRUCT_TO_CHAR_PTR(core_reloc_misc_output) { + .a = 1, + .b = 1, + .c = 0, /* BUG in clang, should be 3 */ + }, + .output_len = sizeof(struct core_reloc_misc_output), + }, }; struct data { diff --git a/tools/testing/selftests/bpf/progs/btf__core_reloc_misc.c b/tools/testing/selftests/bpf/progs/btf__core_reloc_misc.c new file mode 100644 index 000000000000..ed9ad8b5b4f8 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/btf__core_reloc_misc.c @@ -0,0 +1,5 @@ +#include "core_reloc_types.h" + +void f1(struct core_reloc_misc___a x) {} +void f2(struct core_reloc_misc___b x) {} +void f3(struct core_reloc_misc_extensible x) {} diff --git a/tools/testing/selftests/bpf/progs/core_reloc_types.h b/tools/testing/selftests/bpf/progs/core_reloc_types.h index 5f3ebd4f6dc3..10a252b6da55 100644 --- a/tools/testing/selftests/bpf/progs/core_reloc_types.h +++ b/tools/testing/selftests/bpf/progs/core_reloc_types.h @@ -640,3 +640,28 @@ struct core_reloc_ints___err_wrong_sz_64 { uint32_t u64_field; /* not 64-bit anymore */ int32_t s64_field; /* not 64-bit anymore */ }; + +/* + * MISC + */ +struct core_reloc_misc_output { + int a, b, c; +}; + +struct core_reloc_misc___a { + int a1; + int a2; +}; + +struct core_reloc_misc___b { + int b1; + int b2; +}; + +/* this one extends core_reloc_misc_extensible struct from BPF prog */ +struct core_reloc_misc_extensible { + int a; + int b; + int c; + int d; +}; diff --git a/tools/testing/selftests/bpf/progs/test_core_reloc_misc.c b/tools/testing/selftests/bpf/progs/test_core_reloc_misc.c new file mode 100644 index 000000000000..c59984bd3e23 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/test_core_reloc_misc.c @@ -0,0 +1,57 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2019 Facebook + +#include +#include +#include "bpf_helpers.h" + +char _license[] SEC("license") = "GPL"; + +static volatile struct data { + char in[256]; + char out[256]; +} data; + +struct core_reloc_misc_output { + int a, b, c; +}; + +struct core_reloc_misc___a { + int a1; + int a2; +}; + +struct core_reloc_misc___b { + int b1; + int b2; +}; + +/* fixed two first members, can be extended with new fields */ +struct core_reloc_misc_extensible { + int a; + int b; +}; + +SEC("raw_tracepoint/sys_enter") +int test_core_misc(void *ctx) +{ + struct core_reloc_misc___a *in_a = (void *)&data.in; + struct core_reloc_misc___b *in_b = (void *)&data.in; + struct core_reloc_misc_extensible *in_ext = (void *)&data.in; + struct core_reloc_misc_output *out = (void *)&data.out; + + /* record two different relocations with the same accessor string */ + if (BPF_CORE_READ(&out->a, &in_a->a1) || /* accessor: 0:0 */ + BPF_CORE_READ(&out->b, &in_b->b1)) /* accessor: 0:0 */ + return 1; + + /* Validate relocations capture array-only accesses for structs with + * fixed header, but with potentially extendable tail. This will read + * first 4 bytes of 2nd element of in_ext array of potentially + * variably sized struct core_reloc_misc_extensible. */ + if (BPF_CORE_READ(&out->c, &in_ext[2])) /* accessor: 2 */ + return 1; + + return 0; +} + -- 2.17.1