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 EAE51ECE588 for ; Tue, 15 Oct 2019 18:29:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B8F1020854 for ; Tue, 15 Oct 2019 18:29:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=fb.com header.i=@fb.com header.b="hjfdncjP" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726092AbfJOS3W (ORCPT ); Tue, 15 Oct 2019 14:29:22 -0400 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:8522 "EHLO mx0b-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726139AbfJOS3W (ORCPT ); Tue, 15 Oct 2019 14:29:22 -0400 Received: from pps.filterd (m0109332.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id x9FITFMx019719 for ; Tue, 15 Oct 2019 11:29:20 -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=YV6NJEYLFSV8y45YjeTXffx0i3LJIJobtbhAuj7VLOs=; b=hjfdncjPq5blIZ9DnAIrzkK+9QC3gewJxFuaCS2NeOEnyh57TkFToClxBvs0ygmEU6E4 6/wzfpS/eKOO4wLB0s7AGArkMhhL1fYLwCxEoCA/XP2ddhdJB+83+qTkkwaSOn58x+8B XWNzo9wAxtCwvYOvA1b9VW+g82YIyQB8v14= Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com with ESMTP id 2vn1er4fds-8 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Tue, 15 Oct 2019 11:29:20 -0700 Received: from 2401:db00:12:9028:face:0:29:0 (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:83::5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Tue, 15 Oct 2019 11:29:01 -0700 Received: by dev101.prn2.facebook.com (Postfix, from userid 137359) id 8C042861983; Tue, 15 Oct 2019 11:29:00 -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 v2 bpf-next 5/5] selftests/bpf: add field existence CO-RE relocs tests Date: Tue, 15 Oct 2019 11:28:49 -0700 Message-ID: <20191015182849.3922287-6-andriin@fb.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191015182849.3922287-1-andriin@fb.com> References: <20191015182849.3922287-1-andriin@fb.com> X-FB-Internal: Safe MIME-Version: 1.0 Content-Type: text/plain X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,1.0.8 definitions=2019-10-15_06:2019-10-15,2019-10-15 signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 suspectscore=67 spamscore=0 lowpriorityscore=0 malwarescore=0 phishscore=0 clxscore=1015 priorityscore=1501 adultscore=0 mlxlogscore=999 impostorscore=0 mlxscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1908290000 definitions=main-1910150157 X-FB-Internal: deliver Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Add a bunch of tests validating CO-RE is handling field existence relocation. Relaxed CO-RE relocation mode is activated for these new tests to prevent libbpf from rejecting BPF object for no-match relocation, even though test BPF program is not going to use that relocation, if field is missing. Signed-off-by: Andrii Nakryiko --- .../selftests/bpf/prog_tests/core_reloc.c | 76 +++++++++++++++++- .../bpf/progs/btf__core_reloc_existence.c | 3 + ...ore_reloc_existence___err_wrong_arr_kind.c | 3 + ...loc_existence___err_wrong_arr_value_type.c | 3 + ...ore_reloc_existence___err_wrong_int_kind.c | 3 + ..._core_reloc_existence___err_wrong_int_sz.c | 3 + ...ore_reloc_existence___err_wrong_int_type.c | 3 + ..._reloc_existence___err_wrong_struct_type.c | 3 + .../btf__core_reloc_existence___minimal.c | 3 + .../selftests/bpf/progs/core_reloc_types.h | 56 +++++++++++++ .../bpf/progs/test_core_reloc_existence.c | 79 +++++++++++++++++++ 11 files changed, 233 insertions(+), 2 deletions(-) create mode 100644 tools/testing/selftests/bpf/progs/btf__core_reloc_existence.c create mode 100644 tools/testing/selftests/bpf/progs/btf__core_reloc_existence___err_wrong_arr_kind.c create mode 100644 tools/testing/selftests/bpf/progs/btf__core_reloc_existence___err_wrong_arr_value_type.c create mode 100644 tools/testing/selftests/bpf/progs/btf__core_reloc_existence___err_wrong_int_kind.c create mode 100644 tools/testing/selftests/bpf/progs/btf__core_reloc_existence___err_wrong_int_sz.c create mode 100644 tools/testing/selftests/bpf/progs/btf__core_reloc_existence___err_wrong_int_type.c create mode 100644 tools/testing/selftests/bpf/progs/btf__core_reloc_existence___err_wrong_struct_type.c create mode 100644 tools/testing/selftests/bpf/progs/btf__core_reloc_existence___minimal.c create mode 100644 tools/testing/selftests/bpf/progs/test_core_reloc_existence.c diff --git a/tools/testing/selftests/bpf/prog_tests/core_reloc.c b/tools/testing/selftests/bpf/prog_tests/core_reloc.c index 21a0dff66241..7e2f5b4bf7f3 100644 --- a/tools/testing/selftests/bpf/prog_tests/core_reloc.c +++ b/tools/testing/selftests/bpf/prog_tests/core_reloc.c @@ -174,6 +174,21 @@ .fails = true, \ } +#define EXISTENCE_DATA(struct_name) STRUCT_TO_CHAR_PTR(struct_name) { \ + .a = 42, \ +} + +#define EXISTENCE_CASE_COMMON(name) \ + .case_name = #name, \ + .bpf_obj_file = "test_core_reloc_existence.o", \ + .btf_src_file = "btf__core_reloc_" #name ".o", \ + .relaxed_core_relocs = true \ + +#define EXISTENCE_ERR_CASE(name) { \ + EXISTENCE_CASE_COMMON(name), \ + .fails = true, \ +} + struct core_reloc_test_case { const char *case_name; const char *bpf_obj_file; @@ -183,6 +198,7 @@ struct core_reloc_test_case { const char *output; int output_len; bool fails; + bool relaxed_core_relocs; }; static struct core_reloc_test_case test_cases[] = { @@ -283,6 +299,59 @@ static struct core_reloc_test_case test_cases[] = { }, .output_len = sizeof(struct core_reloc_misc_output), }, + + /* validate field existence checks */ + { + EXISTENCE_CASE_COMMON(existence), + .input = STRUCT_TO_CHAR_PTR(core_reloc_existence) { + .a = 1, + .b = 2, + .c = 3, + .arr = { 4 }, + .s = { .x = 5 }, + }, + .input_len = sizeof(struct core_reloc_existence), + .output = STRUCT_TO_CHAR_PTR(core_reloc_existence_output) { + .a_exists = 1, + .b_exists = 1, + .c_exists = 1, + .arr_exists = 1, + .s_exists = 1, + .a_value = 1, + .b_value = 2, + .c_value = 3, + .arr_value = 4, + .s_value = 5, + }, + .output_len = sizeof(struct core_reloc_existence_output), + }, + { + EXISTENCE_CASE_COMMON(existence___minimal), + .input = STRUCT_TO_CHAR_PTR(core_reloc_existence___minimal) { + .a = 42, + }, + .input_len = sizeof(struct core_reloc_existence), + .output = STRUCT_TO_CHAR_PTR(core_reloc_existence_output) { + .a_exists = 1, + .b_exists = 0, + .c_exists = 0, + .arr_exists = 0, + .s_exists = 0, + .a_value = 42, + .b_value = 0xff000002u, + .c_value = 0xff000003u, + .arr_value = 0xff000004u, + .s_value = 0xff000005u, + }, + .output_len = sizeof(struct core_reloc_existence_output), + }, + + EXISTENCE_ERR_CASE(existence__err_int_sz), + EXISTENCE_ERR_CASE(existence__err_int_type), + EXISTENCE_ERR_CASE(existence__err_int_kind), + EXISTENCE_ERR_CASE(existence__err_arr_kind), + EXISTENCE_ERR_CASE(existence__err_arr_value_type), + EXISTENCE_ERR_CASE(existence__err_struct_type), }; struct data { @@ -305,11 +374,14 @@ void test_core_reloc(void) for (i = 0; i < ARRAY_SIZE(test_cases); i++) { test_case = &test_cases[i]; - if (!test__start_subtest(test_case->case_name)) continue; - obj = bpf_object__open(test_case->bpf_obj_file); + LIBBPF_OPTS(bpf_object_open_opts, opts, + .relaxed_core_relocs = test_case->relaxed_core_relocs, + ); + + obj = bpf_object__open_file(test_case->bpf_obj_file, &opts); if (CHECK(IS_ERR_OR_NULL(obj), "obj_open", "failed to open '%s': %ld\n", test_case->bpf_obj_file, PTR_ERR(obj))) diff --git a/tools/testing/selftests/bpf/progs/btf__core_reloc_existence.c b/tools/testing/selftests/bpf/progs/btf__core_reloc_existence.c new file mode 100644 index 000000000000..0b62315ad46c --- /dev/null +++ b/tools/testing/selftests/bpf/progs/btf__core_reloc_existence.c @@ -0,0 +1,3 @@ +#include "core_reloc_types.h" + +void f(struct core_reloc_existence x) {} diff --git a/tools/testing/selftests/bpf/progs/btf__core_reloc_existence___err_wrong_arr_kind.c b/tools/testing/selftests/bpf/progs/btf__core_reloc_existence___err_wrong_arr_kind.c new file mode 100644 index 000000000000..dd0ffa518f36 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/btf__core_reloc_existence___err_wrong_arr_kind.c @@ -0,0 +1,3 @@ +#include "core_reloc_types.h" + +void f(struct core_reloc_existence___err_wrong_arr_kind x) {} diff --git a/tools/testing/selftests/bpf/progs/btf__core_reloc_existence___err_wrong_arr_value_type.c b/tools/testing/selftests/bpf/progs/btf__core_reloc_existence___err_wrong_arr_value_type.c new file mode 100644 index 000000000000..bc83372088ad --- /dev/null +++ b/tools/testing/selftests/bpf/progs/btf__core_reloc_existence___err_wrong_arr_value_type.c @@ -0,0 +1,3 @@ +#include "core_reloc_types.h" + +void f(struct core_reloc_existence___err_wrong_arr_value_type x) {} diff --git a/tools/testing/selftests/bpf/progs/btf__core_reloc_existence___err_wrong_int_kind.c b/tools/testing/selftests/bpf/progs/btf__core_reloc_existence___err_wrong_int_kind.c new file mode 100644 index 000000000000..917bec41be08 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/btf__core_reloc_existence___err_wrong_int_kind.c @@ -0,0 +1,3 @@ +#include "core_reloc_types.h" + +void f(struct core_reloc_existence___err_wrong_int_kind x) {} diff --git a/tools/testing/selftests/bpf/progs/btf__core_reloc_existence___err_wrong_int_sz.c b/tools/testing/selftests/bpf/progs/btf__core_reloc_existence___err_wrong_int_sz.c new file mode 100644 index 000000000000..6ec7e6ec1c91 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/btf__core_reloc_existence___err_wrong_int_sz.c @@ -0,0 +1,3 @@ +#include "core_reloc_types.h" + +void f(struct core_reloc_existence___err_wrong_int_sz x) {} diff --git a/tools/testing/selftests/bpf/progs/btf__core_reloc_existence___err_wrong_int_type.c b/tools/testing/selftests/bpf/progs/btf__core_reloc_existence___err_wrong_int_type.c new file mode 100644 index 000000000000..7bbcacf2b0d1 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/btf__core_reloc_existence___err_wrong_int_type.c @@ -0,0 +1,3 @@ +#include "core_reloc_types.h" + +void f(struct core_reloc_existence___err_wrong_int_type x) {} diff --git a/tools/testing/selftests/bpf/progs/btf__core_reloc_existence___err_wrong_struct_type.c b/tools/testing/selftests/bpf/progs/btf__core_reloc_existence___err_wrong_struct_type.c new file mode 100644 index 000000000000..f384dd38ec70 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/btf__core_reloc_existence___err_wrong_struct_type.c @@ -0,0 +1,3 @@ +#include "core_reloc_types.h" + +void f(struct core_reloc_existence___err_wrong_struct_type x) {} diff --git a/tools/testing/selftests/bpf/progs/btf__core_reloc_existence___minimal.c b/tools/testing/selftests/bpf/progs/btf__core_reloc_existence___minimal.c new file mode 100644 index 000000000000..aec2dec20e90 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/btf__core_reloc_existence___minimal.c @@ -0,0 +1,3 @@ +#include "core_reloc_types.h" + +void f(struct core_reloc_existence___minimal x) {} diff --git a/tools/testing/selftests/bpf/progs/core_reloc_types.h b/tools/testing/selftests/bpf/progs/core_reloc_types.h index 9a6bdeb4894c..ad763ec0ba8f 100644 --- a/tools/testing/selftests/bpf/progs/core_reloc_types.h +++ b/tools/testing/selftests/bpf/progs/core_reloc_types.h @@ -674,3 +674,59 @@ struct core_reloc_misc_extensible { int c; int d; }; + +/* + * EXISTENCE + */ +struct core_reloc_existence_output { + int a_exists; + int a_value; + int b_exists; + int b_value; + int c_exists; + int c_value; + int arr_exists; + int arr_value; + int s_exists; + int s_value; +}; + +struct core_reloc_existence { + int a; + struct { + int b; + }; + int c; + int arr[1]; + struct { + int x; + } s; +}; + +struct core_reloc_existence___minimal { + int a; +}; + +struct core_reloc_existence___err_wrong_int_sz { + short a; +}; + +struct core_reloc_existence___err_wrong_int_type { + int b[1]; +}; + +struct core_reloc_existence___err_wrong_int_kind { + struct{ int x; } c; +}; + +struct core_reloc_existence___err_wrong_arr_kind { + int arr; +}; + +struct core_reloc_existence___err_wrong_arr_value_type { + short arr[1]; +}; + +struct core_reloc_existence___err_wrong_struct_type { + int s; +}; diff --git a/tools/testing/selftests/bpf/progs/test_core_reloc_existence.c b/tools/testing/selftests/bpf/progs/test_core_reloc_existence.c new file mode 100644 index 000000000000..c3cac95a19f1 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/test_core_reloc_existence.c @@ -0,0 +1,79 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2019 Facebook + +#include +#include +#include "bpf_helpers.h" +#include "bpf_core_read.h" + +char _license[] SEC("license") = "GPL"; + +static volatile struct data { + char in[256]; + char out[256]; +} data; + +struct core_reloc_existence_output { + int a_exists; + int a_value; + int b_exists; + int b_value; + int c_exists; + int c_value; + int arr_exists; + int arr_value; + int s_exists; + int s_value; +}; + +struct core_reloc_existence { + struct { + int x; + } s; + int arr[1]; + int a; + struct { + int b; + }; + int c; +}; + +SEC("raw_tracepoint/sys_enter") +int test_core_existence(void *ctx) +{ + struct core_reloc_existence *in = (void *)&data.in; + struct core_reloc_existence_output *out = (void *)&data.out; + + out->a_exists = bpf_core_field_exists(in->a); + if (bpf_core_field_exists(in->a)) + out->a_value = BPF_CORE_READ(in, a); + else + out->a_value = 0xff000001u; + + out->b_exists = bpf_core_field_exists(in->b); + if (bpf_core_field_exists(in->b)) + out->b_value = BPF_CORE_READ(in, b); + else + out->b_value = 0xff000002u; + + out->c_exists = bpf_core_field_exists(in->c); + if (bpf_core_field_exists(in->c)) + out->c_value = BPF_CORE_READ(in, c); + else + out->c_value = 0xff000003u; + + out->arr_exists = bpf_core_field_exists(in->arr); + if (bpf_core_field_exists(in->arr)) + out->arr_value = BPF_CORE_READ(in, arr[0]); + else + out->arr_value = 0xff000004u; + + out->s_exists = bpf_core_field_exists(in->s); + if (bpf_core_field_exists(in->s)) + out->s_value = BPF_CORE_READ(in, s.x); + else + out->s_value = 0xff000005u; + + return 0; +} + -- 2.17.1