[bpf-next,9/9] selftests/bpf: add tests for ENUMVAL_EXISTS/ENUMVAL_VALUE relocations

Message ID	20200818223921.2911963-10-andriin@fb.com
State	Changes Requested
Delegated to:	BPF Maintainers
Headers	show Return-Path: <bpf-owner@vger.kernel.org> Smtp-Origin-Hostprefix: devbig From: Andrii Nakryiko <andriin@fb.com> Smtp-Origin-Hostname: devbig012.ftw2.facebook.com To: <bpf@vger.kernel.org>, <netdev@vger.kernel.org>, <ast@fb.com>, <daniel@iogearbox.net> CC: <andrii.nakryiko@gmail.com>, <kernel-team@fb.com>, Andrii Nakryiko <andriin@fb.com> Smtp-Origin-Cluster: ftw2c04 Subject: [PATCH bpf-next 9/9] selftests/bpf: add tests for ENUMVAL_EXISTS/ENUMVAL_VALUE relocations Date: Tue, 18 Aug 2020 15:39:21 -0700 Message-ID: <20200818223921.2911963-10-andriin@fb.com> In-Reply-To: <20200818223921.2911963-1-andriin@fb.com> References: <20200818223921.2911963-1-andriin@fb.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain Sender: bpf-owner@vger.kernel.org Precedence: bulk
Series	Add support for type-based and enum value-based CO-RE relocations \| expand [bpf-next,0/9] Add support for type-based and enum value-based CO-RE relocations [bpf-next,1/9] libbpf: improve error logging for mismatched BTF kind cases [bpf-next,2/9] libbpf: clean up and improve CO-RE reloc logging [bpf-next,3/9] libbpf: improve relocation ambiguity detection [bpf-next,4/9] selftests/bpf: add test validating failure on ambiguous relocation value [bpf-next,5/9] libbpf: implement type-based CO-RE relocations support [bpf-next,6/9] selftests/bpf: test TYPE_EXISTS and TYPE_SIZE CO-RE relocations [bpf-next,7/9] selftests/bpf: add CO-RE relo test for TYPE_ID_LOCAL/TYPE_ID_TARGET [bpf-next,8/9] libbpf: implement enum value-based CO-RE relocations [bpf-next,9/9] selftests/bpf: add tests for ENUMVAL_EXISTS/ENUMVAL_VALUE relocations

diff --git a/tools/testing/selftests/bpf/prog_tests/core_reloc.c b/tools/testing/selftests/bpf/prog_tests/core_reloc.c index 54b74a8d33bc..81fba365d5d7 100644 --- a/tools/testing/selftests/bpf/prog_tests/core_reloc.c +++ b/tools/testing/selftests/bpf/prog_tests/core_reloc.c @@ -289,6 +289,23 @@ static int duration = 0; .fails = true, \ } +#define ENUMVAL_CASE_COMMON(name) \ + .case_name = #name, \ + .bpf_obj_file = "test_core_reloc_enumval.o", \ + .btf_src_file = "btf__core_reloc_" #name ".o" \ + +#define ENUMVAL_CASE(name, ...) { \ + ENUMVAL_CASE_COMMON(name), \ + .output = STRUCT_TO_CHAR_PTR(core_reloc_enumval_output) \ + __VA_ARGS__, \ + .output_len = sizeof(struct core_reloc_enumval_output), \ +} + +#define ENUMVAL_ERR_CASE(name) { \ + ENUMVAL_CASE_COMMON(name), \ + .fails = true, \ +} + struct core_reloc_test_case; typedef int (*setup_test_fn)(struct core_reloc_test_case *test); @@ -318,7 +335,7 @@ int find_btf_type(const struct btf *btf, const char *name, __u32 kind) return id; } -static int setup_type_id_case_success(struct core_reloc_test_case *test) +static int setup_type_id_case_local(struct core_reloc_test_case *test) { struct core_reloc_type_id_output *exp = (void *)test->output; struct btf *local_btf = btf__parse(test->bpf_obj_file, NULL); @@ -386,6 +403,22 @@ static int setup_type_id_case_success(struct core_reloc_test_case *test) exp->local_func_proto_typedef = find_btf_type(local_btf, "func_proto_typedef", BTF_KIND_TYPEDEF); exp->local_arr_typedef = find_btf_type(local_btf, "arr_typedef", BTF_KIND_TYPEDEF); + btf__free(local_btf); + btf__free(targ_btf); + return 0; +} + +static int setup_type_id_case_success(struct core_reloc_test_case *test) { + struct core_reloc_type_id_output *exp = (void *)test->output; + struct btf *targ_btf = btf__parse(test->btf_src_file, NULL); + int err; + + err = setup_type_id_case_local(test); + if (err) + return err; + + targ_btf = btf__parse(test->btf_src_file, NULL); + exp->targ_struct = find_btf_type(targ_btf, "a_struct", BTF_KIND_STRUCT); exp->targ_union = find_btf_type(targ_btf, "a_union", BTF_KIND_UNION); exp->targ_enum = find_btf_type(targ_btf, "an_enum", BTF_KIND_ENUM); @@ -394,6 +427,7 @@ static int setup_type_id_case_success(struct core_reloc_test_case *test) exp->targ_func_proto_typedef = find_btf_type(targ_btf, "func_proto_typedef", BTF_KIND_TYPEDEF); exp->targ_arr_typedef = find_btf_type(targ_btf, "arr_typedef", BTF_KIND_TYPEDEF); + btf__free(targ_btf); return 0; } @@ -402,7 +436,7 @@ static int setup_type_id_case_failure(struct core_reloc_test_case *test) struct core_reloc_type_id_output *exp = (void *)test->output; int err; - err = setup_type_id_case_success(test); + err = setup_type_id_case_local(test); if (err) return err; @@ -669,6 +703,45 @@ static struct core_reloc_test_case test_cases[] = { /* BTF_TYPE_ID_LOCAL/BTF_TYPE_ID_TARGET tests */ TYPE_ID_CASE(type_id, setup_type_id_case_success), TYPE_ID_CASE(type_id___missing_targets, setup_type_id_case_failure), + + /* Enumerator value existence and value relocations */ + ENUMVAL_CASE(enumval, { + .named_val1_exists = true, + .named_val2_exists = true, + .named_val3_exists = true, + .anon_val1_exists = true, + .anon_val2_exists = true, + .anon_val3_exists = true, + .named_val1 = 1, + .named_val2 = 2, + .anon_val1 = 0x10, + .anon_val2 = 0x20, + }), + ENUMVAL_CASE(enumval___diff, { + .named_val1_exists = true, + .named_val2_exists = true, + .named_val3_exists = true, + .anon_val1_exists = true, + .anon_val2_exists = true, + .anon_val3_exists = true, + .named_val1 = 101, + .named_val2 = 202, + .anon_val1 = 0x11, + .anon_val2 = 0x22, + }), + ENUMVAL_CASE(enumval___val3_missing, { + .named_val1_exists = true, + .named_val2_exists = true, + .named_val3_exists = false, + .anon_val1_exists = true, + .anon_val2_exists = true, + .anon_val3_exists = false, + .named_val1 = 111, + .named_val2 = 222, + .anon_val1 = 0x111, + .anon_val2 = 0x222, + }), + ENUMVAL_ERR_CASE(enumval___err_missing), }; struct data { diff --git a/tools/testing/selftests/bpf/progs/btf__core_reloc_enumval.c b/tools/testing/selftests/bpf/progs/btf__core_reloc_enumval.c new file mode 100644 index 000000000000..48e62f3f074f --- /dev/null +++ b/tools/testing/selftests/bpf/progs/btf__core_reloc_enumval.c @@ -0,0 +1,3 @@ +#include "core_reloc_types.h" + +void f(struct core_reloc_enumval x) {} diff --git a/tools/testing/selftests/bpf/progs/btf__core_reloc_enumval___diff.c b/tools/testing/selftests/bpf/progs/btf__core_reloc_enumval___diff.c new file mode 100644 index 000000000000..53e5e5a76888 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/btf__core_reloc_enumval___diff.c @@ -0,0 +1,3 @@ +#include "core_reloc_types.h" + +void f(struct core_reloc_enumval___diff x) {} diff --git a/tools/testing/selftests/bpf/progs/btf__core_reloc_enumval___err_missing.c b/tools/testing/selftests/bpf/progs/btf__core_reloc_enumval___err_missing.c new file mode 100644 index 000000000000..d024fb2ac06e --- /dev/null +++ b/tools/testing/selftests/bpf/progs/btf__core_reloc_enumval___err_missing.c @@ -0,0 +1,3 @@ +#include "core_reloc_types.h" + +void f(struct core_reloc_enumval___err_missing x) {} diff --git a/tools/testing/selftests/bpf/progs/btf__core_reloc_enumval___val3_missing.c b/tools/testing/selftests/bpf/progs/btf__core_reloc_enumval___val3_missing.c new file mode 100644 index 000000000000..9de6595d250c --- /dev/null +++ b/tools/testing/selftests/bpf/progs/btf__core_reloc_enumval___val3_missing.c @@ -0,0 +1,3 @@ +#include "core_reloc_types.h" + +void f(struct core_reloc_enumval___val3_missing x) {} diff --git a/tools/testing/selftests/bpf/progs/core_reloc_types.h b/tools/testing/selftests/bpf/progs/core_reloc_types.h index 10afcc5f219f..e6e616cb7bc9 100644 --- a/tools/testing/selftests/bpf/progs/core_reloc_types.h +++ b/tools/testing/selftests/bpf/progs/core_reloc_types.h @@ -1075,3 +1075,87 @@ struct core_reloc_type_id { struct core_reloc_type_id___missing_targets { /* nothing */ }; + +/* + * ENUMERATOR VALUE EXISTENCE AND VALUE RELOCATION + */ +struct core_reloc_enumval_output { + bool named_val1_exists; + bool named_val2_exists; + bool named_val3_exists; + bool anon_val1_exists; + bool anon_val2_exists; + bool anon_val3_exists; + + int named_val1; + int named_val2; + int anon_val1; + int anon_val2; +}; + +enum named_enum { + NAMED_ENUM_VAL1 = 1, + NAMED_ENUM_VAL2 = 2, + NAMED_ENUM_VAL3 = 3, +}; + +typedef enum { + ANON_ENUM_VAL1 = 0x10, + ANON_ENUM_VAL2 = 0x20, + ANON_ENUM_VAL3 = 0x30, +} anon_enum; + +struct core_reloc_enumval { + enum named_enum f1; + anon_enum f2; +}; + +/* differing enumerator values */ +enum named_enum___diff { + NAMED_ENUM_VAL1___diff = 101, + NAMED_ENUM_VAL2___diff = 202, + NAMED_ENUM_VAL3___diff = 303, +}; + +typedef enum { + ANON_ENUM_VAL1___diff = 0x11, + ANON_ENUM_VAL2___diff = 0x22, + ANON_ENUM_VAL3___diff = 0x33, +} anon_enum___diff; + +struct core_reloc_enumval___diff { + enum named_enum___diff f1; + anon_enum___diff f2; +}; + +/* missing (optional) third enum value */ +enum named_enum___val3_missing { + NAMED_ENUM_VAL1___val3_missing = 111, + NAMED_ENUM_VAL2___val3_missing = 222, +}; + +typedef enum { + ANON_ENUM_VAL1___val3_missing = 0x111, + ANON_ENUM_VAL2___val3_missing = 0x222, +} anon_enum___val3_missing; + +struct core_reloc_enumval___val3_missing { + enum named_enum___val3_missing f1; + anon_enum___val3_missing f2; +}; + +/* missing (mandatory) second enum value, should fail */ +enum named_enum___err_missing { + NAMED_ENUM_VAL1___err_missing = 1, + NAMED_ENUM_VAL3___err_missing = 3, +}; + +typedef enum { + ANON_ENUM_VAL1___err_missing = 0x111, + ANON_ENUM_VAL3___err_missing = 0x222, +} anon_enum___err_missing; + +struct core_reloc_enumval___err_missing { + enum named_enum___err_missing f1; + anon_enum___err_missing f2; +}; diff --git a/tools/testing/selftests/bpf/progs/test_core_reloc_enumval.c b/tools/testing/selftests/bpf/progs/test_core_reloc_enumval.c new file mode 100644 index 000000000000..e92f06115937 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/test_core_reloc_enumval.c @@ -0,0 +1,69 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2020 Facebook + +#include <linux/bpf.h> +#include <stdint.h> +#include <stdbool.h> +#include <bpf/bpf_helpers.h> +#include <bpf/bpf_core_read.h> + +char _license[] SEC("license") = "GPL"; + +struct { + char in[256]; + char out[256]; +} data = {}; + +enum named_enum { + NAMED_ENUM_VAL1 = 1, + NAMED_ENUM_VAL2 = 2, + NAMED_ENUM_VAL3 = 3, +}; + +typedef enum { + ANON_ENUM_VAL1 = 0x10, + ANON_ENUM_VAL2 = 0x20, + ANON_ENUM_VAL3 = 0x30, +} anon_enum; + +struct core_reloc_enumval_output { + bool named_val1_exists; + bool named_val2_exists; + bool named_val3_exists; + bool anon_val1_exists; + bool anon_val2_exists; + bool anon_val3_exists; + + int named_val1; + int named_val2; + int anon_val1; + int anon_val2; +}; + +SEC("raw_tracepoint/sys_enter") +int test_core_enumval(void *ctx) +{ + struct core_reloc_enumval_output *out = (void *)&data.out; + + enum named_enum named = 0; + anon_enum anon = 0; + + out->named_val1_exists = bpf_core_enum_value_exists(named, NAMED_ENUM_VAL1); + out->named_val2_exists = bpf_core_enum_value_exists(enum named_enum, NAMED_ENUM_VAL2); + out->named_val3_exists = bpf_core_enum_value_exists(enum named_enum, NAMED_ENUM_VAL3); + + out->anon_val1_exists = bpf_core_enum_value_exists(anon, ANON_ENUM_VAL1); + out->anon_val2_exists = bpf_core_enum_value_exists(anon_enum, ANON_ENUM_VAL2); + out->anon_val3_exists = bpf_core_enum_value_exists(anon_enum, ANON_ENUM_VAL3); + + out->named_val1 = bpf_core_enum_value(named, NAMED_ENUM_VAL1); + out->named_val2 = bpf_core_enum_value(named, NAMED_ENUM_VAL2); + /* NAMED_ENUM_VAL3 value is optional */ + + out->anon_val1 = bpf_core_enum_value(anon, ANON_ENUM_VAL1); + out->anon_val2 = bpf_core_enum_value(anon, ANON_ENUM_VAL2); + /* ANON_ENUM_VAL3 value is optional */ + + return 0; +} +

[bpf-next,9/9] selftests/bpf: add tests for ENUMVAL_EXISTS/ENUMVAL_VALUE relocations

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