From patchwork Sat Apr 17 03:32:14 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexei Starovoitov X-Patchwork-Id: 12209497 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 X-Spam-Level: X-Spam-Status: No, score=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 ED2DBC433B4 for ; Sat, 17 Apr 2021 03:33:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CF2FA6115B for ; Sat, 17 Apr 2021 03:33:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235662AbhDQDd5 (ORCPT ); Fri, 16 Apr 2021 23:33:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46568 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235633AbhDQDdw (ORCPT ); Fri, 16 Apr 2021 23:33:52 -0400 Received: from mail-pl1-x62b.google.com (mail-pl1-x62b.google.com [IPv6:2607:f8b0:4864:20::62b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C1802C061763; Fri, 16 Apr 2021 20:32:34 -0700 (PDT) Received: by mail-pl1-x62b.google.com with SMTP id u15so6406670plf.10; Fri, 16 Apr 2021 20:32:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=f1rtDrcI3CYyjwYGpxcm2rdJeAx/txx8UG6Vi7n/bII=; b=JSZBNNjgd/yigvQGLxZrYT4P7XSYQG4mPEObVym538HL+J6RWTT7IavMCP52K15USm KrONsce5neiR5z3uT/sUSkZJ3GmE0I4qZmI1tNrB6BO0AUdb3a7mMIrXallv4Er81N9k T+kgglnukdnCP5E6Co8BWWaJjg9d9Y9R79j3j+9neQZDCnnvAAD0CGrh+rmCRK3JMfFD foKmxwpR4MguKGVwFTsO/0cWMhqlvBp4TFFjzEVzhkNg8Cnb1fOem7+w5AKoy4z3AdKW vGPTPppz2FWRTZDioecbyiPQeJV7K2sKuT6WQzhRWGxxzBO5d7IgeHwubfOATg5kSgxe LvtA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=f1rtDrcI3CYyjwYGpxcm2rdJeAx/txx8UG6Vi7n/bII=; b=ja32sDDiQZQ0wKl0eK65WlovNAArKCCSaSBVnK813gJsrGndmoetZudT3O3dnRR5P3 h2NPOjofRzAGlNAy1MkIS/hRzkbMb/alvWEMrMPEcz+pb796X5nr/sjTofMiPilhB5lr AMhOfAnRi0jgyqugWDCvAdRFHpxnLgaGUDzcYEHU2l+jR3rZ3EGEndXlHEu18wEk7sVC 769snHZgJ0ZAtAlYA5njAgecA/re22bEzTQiD4jlbGmrIaRZylEg3VzrK+faHWYpo1pz sMX1/2s+VcjCPXwNVXkfkAYArkmSjJ2Q2uUqdeCWzENWXmwO79F2EohMKQ08dyr7IIHd BZkQ== X-Gm-Message-State: AOAM532WRN4GnOEOnGI2ROzIQGEA0pIXtJSkqJ1E4oQhXcV4nlBIJZRV 2No+RAh8PUQX3I+bn99/TtU= X-Google-Smtp-Source: ABdhPJzY3nq6MDyPFFW48hd8hi0T8sj05FsYKYEQ2Zp8XbpPGfEcAyQohj6KdR+dR8GflGPMyQPcoQ== X-Received: by 2002:a17:90a:394f:: with SMTP id n15mr12996206pjf.43.1618630354005; Fri, 16 Apr 2021 20:32:34 -0700 (PDT) Received: from ast-mbp.thefacebook.com ([163.114.132.7]) by smtp.gmail.com with ESMTPSA id h1sm6069870pgv.88.2021.04.16.20.32.32 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Fri, 16 Apr 2021 20:32:33 -0700 (PDT) From: Alexei Starovoitov To: davem@davemloft.net Cc: daniel@iogearbox.net, andrii@kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kernel-team@fb.com Subject: [PATCH bpf-next 05/15] selftests/bpf: Test for syscall program type Date: Fri, 16 Apr 2021 20:32:14 -0700 Message-Id: <20210417033224.8063-6-alexei.starovoitov@gmail.com> X-Mailer: git-send-email 2.13.5 In-Reply-To: <20210417033224.8063-1-alexei.starovoitov@gmail.com> References: <20210417033224.8063-1-alexei.starovoitov@gmail.com> Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net From: Alexei Starovoitov bpf_prog_type_syscall is a program that creates a bpf map, updates it, and loads another bpf program using bpf_sys_bpf() helper. Signed-off-by: Alexei Starovoitov --- tools/testing/selftests/bpf/Makefile | 1 + .../selftests/bpf/prog_tests/syscall.c | 53 ++++++++++++++ tools/testing/selftests/bpf/progs/syscall.c | 73 +++++++++++++++++++ 3 files changed, 127 insertions(+) create mode 100644 tools/testing/selftests/bpf/prog_tests/syscall.c create mode 100644 tools/testing/selftests/bpf/progs/syscall.c diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index c45ae13b88a0..5e618ff1e8fd 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -277,6 +277,7 @@ MENDIAN=$(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian) CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG)) BPF_CFLAGS = -g -D__TARGET_ARCH_$(SRCARCH) $(MENDIAN) \ -I$(INCLUDE_DIR) -I$(CURDIR) -I$(APIDIR) \ + -I$(TOOLSINCDIR) \ -I$(abspath $(OUTPUT)/../usr/include) CLANG_CFLAGS = $(CLANG_SYS_INCLUDES) \ diff --git a/tools/testing/selftests/bpf/prog_tests/syscall.c b/tools/testing/selftests/bpf/prog_tests/syscall.c new file mode 100644 index 000000000000..e550e36bb5da --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/syscall.c @@ -0,0 +1,53 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2021 Facebook */ +#include +#include "syscall.skel.h" + +struct args { + __u64 log_buf; + __u32 log_size; + int max_entries; + int map_fd; + int prog_fd; +}; + +void test_syscall(void) +{ + static char verifier_log[8192]; + struct args ctx = { + .max_entries = 1024, + .log_buf = (uintptr_t) verifier_log, + .log_size = sizeof(verifier_log), + }; + struct bpf_prog_test_run_attr tattr = { + .ctx_in = &ctx, + .ctx_size_in = sizeof(ctx), + }; + struct syscall *skel = NULL; + __u64 key = 12, value = 0; + __u32 duration = 0; + int err; + + skel = syscall__open_and_load(); + if (CHECK(!skel, "skel_load", "syscall skeleton failed\n")) + goto cleanup; + + tattr.prog_fd = bpf_program__fd(skel->progs.bpf_prog); + err = bpf_prog_test_run_xattr(&tattr); + if (CHECK(err || tattr.retval != 1, "test_run sys_bpf", + "err %d errno %d retval %d duration %d\n", + err, errno, tattr.retval, tattr.duration)) + goto cleanup; + + CHECK(ctx.map_fd <= 0, "map_fd", "fd = %d\n", ctx.map_fd); + CHECK(ctx.prog_fd <= 0, "prog_fd", "fd = %d\n", ctx.prog_fd); + CHECK(memcmp(verifier_log, "processed", sizeof("processed") - 1) != 0, + "verifier_log", "%s\n", verifier_log); + + err = bpf_map_lookup_elem(ctx.map_fd, &key, &value); + CHECK(err, "map_lookup", "map_lookup failed\n"); + CHECK(value != 34, "invalid_value", + "got value %llu expected %u\n", value, 34); +cleanup: + syscall__destroy(skel); +} diff --git a/tools/testing/selftests/bpf/progs/syscall.c b/tools/testing/selftests/bpf/progs/syscall.c new file mode 100644 index 000000000000..01476f88e45f --- /dev/null +++ b/tools/testing/selftests/bpf/progs/syscall.c @@ -0,0 +1,73 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2021 Facebook */ +#include +#include +#include +#include +#include <../../tools/include/linux/filter.h> + +volatile const int workaround = 1; + +char _license[] SEC("license") = "GPL"; + +struct args { + __u64 log_buf; + __u32 log_size; + int max_entries; + int map_fd; + int prog_fd; +}; + +SEC("syscall") +int bpf_prog(struct args *ctx) +{ + static char license[] = "GPL"; + static struct bpf_insn insns[] = { + BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0), + BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8), + BPF_LD_MAP_FD(BPF_REG_1, 0), + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }; + static union bpf_attr map_create_attr = { + .map_type = BPF_MAP_TYPE_HASH, + .key_size = 8, + .value_size = 8, + }; + static union bpf_attr map_update_attr = { .map_fd = 1, }; + static __u64 key = 12; + static __u64 value = 34; + static union bpf_attr prog_load_attr = { + .prog_type = BPF_PROG_TYPE_XDP, + .insn_cnt = sizeof(insns) / sizeof(insns[0]), + }; + int ret; + + map_create_attr.max_entries = ctx->max_entries; + prog_load_attr.license = (long) license; + prog_load_attr.insns = (long) insns; + prog_load_attr.log_buf = ctx->log_buf; + prog_load_attr.log_size = ctx->log_size; + prog_load_attr.log_level = 1; + + ret = bpf_sys_bpf(BPF_MAP_CREATE, &map_create_attr, sizeof(map_create_attr)); + if (ret <= 0) + return ret; + ctx->map_fd = ret; + insns[3].imm = ret; + + map_update_attr.map_fd = ret; + map_update_attr.key = (long) &key; + map_update_attr.value = (long) &value; + ret = bpf_sys_bpf(BPF_MAP_UPDATE_ELEM, &map_update_attr, sizeof(map_update_attr)); + if (ret < 0) + return ret; + + ret = bpf_sys_bpf(BPF_PROG_LOAD, &prog_load_attr, sizeof(prog_load_attr)); + if (ret <= 0) + return ret; + ctx->prog_fd = ret; + return 1; +}