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=-16.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT, USER_IN_DEF_DKIM_WL 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 CD5EFC48BD6 for ; Wed, 26 Jun 2019 00:39:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9B69320883 for ; Wed, 26 Jun 2019 00:39:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="fifiLQ15" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726489AbfFZAjE (ORCPT ); Tue, 25 Jun 2019 20:39:04 -0400 Received: from mail-qk1-f201.google.com ([209.85.222.201]:53736 "EHLO mail-qk1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726464AbfFZAjC (ORCPT ); Tue, 25 Jun 2019 20:39:02 -0400 Received: by mail-qk1-f201.google.com with SMTP id i196so589641qke.20 for ; Tue, 25 Jun 2019 17:39:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=8CHLKwEbd3YBZKYd+DyQzqHqrINl27JKaSJDDjaFygI=; b=fifiLQ15f5NYld74zr46d8R3gd3WIcaz2i7g8Z2FdgJKIO13TYgmAcE1+S4L/EMr2K Gi87yY+Yklbl5QJDVrw2aNckiqAzu0t01YpQ/lFq8xz4JyqQSDvLxiWc4F1HivMW1jDC alSwkd80gx9GTmIJxIabe6fSUPuBvDXXCPaSbEmTQ7YH5sT4C1wUGoAi0c0uq1ztuONw 3X5YmDynYSKMdPpcpryNsnj+RKM6SynyBjyUMSYgvTfrAC+azipmxbHFHOvj3RfeMvfo arKA0EuM6MnI+ONMZZ4yeJ9lQLwOt0tFHRPd9wx1n/CH0D6QA9QCYLF/3smqN4lf789J vxlQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=8CHLKwEbd3YBZKYd+DyQzqHqrINl27JKaSJDDjaFygI=; b=ofXtzPFfsz87Reh/5+h+gwyPXB6KMrESzh2JQSNnYSXjhKtukIJrtMAQUd4uzEPYCk jqfNvq3HlF/+M/MAcERp7wglaY/x/mcMENXuvRTAhcULZH1ERVeceroNc8yGoW0g2W8W sHWXlAz9+6E4OXfRwnt1oEzPdm0t5Vdc5ghy8ZnlIEMX82ffqycxqyxoOMSA7+SL1HhO 3A4rEYzLdBqujc0pZdDfleV6TkNKPhHEARJX+MVNZk3ZJI39aet6fPD8w2DWhf3w0nx2 pZjlUszHw6mjnnulaxeg7P2dzQM1iadkwLogU6QiSjvkeJvvmDPJavhgL5aHX/NsTYy2 MjMg== X-Gm-Message-State: APjAAAWGB3+q1WlUtbennHP5miRqHuzKURp34wmzIYSuut7L2PLrMoj3 8M59yr09s6nqbI4lGnJpHAtvZcwjAKJkxvpL X-Google-Smtp-Source: APXvYqygietrlEzFx4gHfLBj888fa6Bm0lY9iT+OK6Ph8qWVJdnYo+FKL5TEH6D+Z0X1Cnw0Z3HO5XrcKpspjdky X-Received: by 2002:a0c:93cb:: with SMTP id g11mr1037451qvg.133.1561509541413; Tue, 25 Jun 2019 17:39:01 -0700 (PDT) Date: Tue, 25 Jun 2019 17:38:52 -0700 In-Reply-To: <20190626003852.163986-1-allanzhang@google.com> Message-Id: <20190626003852.163986-3-allanzhang@google.com> Mime-Version: 1.0 References: <20190626003852.163986-1-allanzhang@google.com> X-Mailer: git-send-email 2.22.0.410.gd8fdbe21b5-goog Subject: [PATCH bpf-next v5 2/2] bpf: Add selftests for bpf_perf_event_output From: allanzhang To: Alexei Starovoitov , Daniel Borkmann , Martin KaFai Lau , Song Liu , Yonghong Song , "David S. Miller" , netdev@vger.kernel.org, bpf@vger.kernel.org, linux-kernel@vger.kernel.org Cc: allanzhang Content-Type: text/plain; charset="UTF-8" Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Software event output is only enabled by a few prog types. This test is to ensure that all supported types are enabled for bpf_perf_event_output successfully. Signed-off-by: allan zhang --- tools/testing/selftests/bpf/test_verifier.c | 12 ++- .../selftests/bpf/verifier/event_output.c | 94 +++++++++++++++++++ 2 files changed, 105 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/bpf/verifier/event_output.c diff --git a/tools/testing/selftests/bpf/test_verifier.c b/tools/testing/selftests/bpf/test_verifier.c index c5514daf8865..5e98d7c37eb7 100644 --- a/tools/testing/selftests/bpf/test_verifier.c +++ b/tools/testing/selftests/bpf/test_verifier.c @@ -50,7 +50,7 @@ #define MAX_INSNS BPF_MAXINSNS #define MAX_TEST_INSNS 1000000 #define MAX_FIXUPS 8 -#define MAX_NR_MAPS 18 +#define MAX_NR_MAPS 19 #define MAX_TEST_RUNS 8 #define POINTER_VALUE 0xcafe4all #define TEST_DATA_LEN 64 @@ -84,6 +84,7 @@ struct bpf_test { int fixup_map_array_wo[MAX_FIXUPS]; int fixup_map_array_small[MAX_FIXUPS]; int fixup_sk_storage_map[MAX_FIXUPS]; + int fixup_map_event_output[MAX_FIXUPS]; const char *errstr; const char *errstr_unpriv; uint32_t retval, retval_unpriv, insn_processed; @@ -627,6 +628,7 @@ static void do_test_fixup(struct bpf_test *test, enum bpf_prog_type prog_type, int *fixup_map_array_wo = test->fixup_map_array_wo; int *fixup_map_array_small = test->fixup_map_array_small; int *fixup_sk_storage_map = test->fixup_sk_storage_map; + int *fixup_map_event_output = test->fixup_map_event_output; if (test->fill_helper) { test->fill_insns = calloc(MAX_TEST_INSNS, sizeof(struct bpf_insn)); @@ -788,6 +790,14 @@ static void do_test_fixup(struct bpf_test *test, enum bpf_prog_type prog_type, fixup_sk_storage_map++; } while (*fixup_sk_storage_map); } + if (*fixup_map_event_output) { + map_fds[18] = __create_map(BPF_MAP_TYPE_PERF_EVENT_ARRAY, + sizeof(int), sizeof(int), 1, 0); + do { + prog[*fixup_map_event_output].imm = map_fds[18]; + fixup_map_event_output++; + } while (*fixup_map_event_output); + } } static int set_admin(bool admin) diff --git a/tools/testing/selftests/bpf/verifier/event_output.c b/tools/testing/selftests/bpf/verifier/event_output.c new file mode 100644 index 000000000000..059cc70addf9 --- /dev/null +++ b/tools/testing/selftests/bpf/verifier/event_output.c @@ -0,0 +1,94 @@ +/* instructions used to output a skb based software event, produced + * from code snippet: + * struct TMP { + * uint64_t tmp; + * } tt; + * tt.tmp = 5; + * bpf_perf_event_output(skb, &connection_tracking_event_map, 0, + * &tt, sizeof(tt)); + * return 1; + * + * the bpf assembly from llvm is: + * 0: b7 02 00 00 05 00 00 00 r2 = 5 + * 1: 7b 2a f8 ff 00 00 00 00 *(u64 *)(r10 - 8) = r2 + * 2: bf a4 00 00 00 00 00 00 r4 = r10 + * 3: 07 04 00 00 f8 ff ff ff r4 += -8 + * 4: 18 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 r2 = 0ll + * 6: b7 03 00 00 00 00 00 00 r3 = 0 + * 7: b7 05 00 00 08 00 00 00 r5 = 8 + * 8: 85 00 00 00 19 00 00 00 call 25 + * 9: b7 00 00 00 01 00 00 00 r0 = 1 + * 10: 95 00 00 00 00 00 00 00 exit + * + * The reason I put the code here instead of fill_helpers is that map fixup + * is against the insns, instead of filled prog. +*/ + +#define __PERF_EVENT_INSNS__ \ + BPF_MOV64_IMM(BPF_REG_2, 5), \ + BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_2, -8), \ + BPF_MOV64_REG(BPF_REG_4, BPF_REG_10), \ + BPF_ALU64_IMM(BPF_ADD, BPF_REG_4, -8), \ + BPF_LD_MAP_FD(BPF_REG_2, 0), \ + BPF_MOV64_IMM(BPF_REG_3, 0), \ + BPF_MOV64_IMM(BPF_REG_5, 8), \ + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, \ + BPF_FUNC_perf_event_output), \ + BPF_MOV64_IMM(BPF_REG_0, 1), \ + BPF_EXIT_INSN(), +{ + "perfevent for sockops", + .insns = { __PERF_EVENT_INSNS__ }, + .prog_type = BPF_PROG_TYPE_SOCK_OPS, + .fixup_map_event_output = { 4 }, + .result = ACCEPT, + .retval = 1, +}, +{ + "perfevent for tc", + .insns = { __PERF_EVENT_INSNS__ }, + .prog_type = BPF_PROG_TYPE_SCHED_CLS, + .fixup_map_event_output = { 4 }, + .result = ACCEPT, + .retval = 1, +}, +{ + "perfevent for lwt out", + .insns = { __PERF_EVENT_INSNS__ }, + .prog_type = BPF_PROG_TYPE_LWT_OUT, + .fixup_map_event_output = { 4 }, + .result = ACCEPT, + .retval = 1, +}, +{ + "perfevent for xdp", + .insns = { __PERF_EVENT_INSNS__ }, + .prog_type = BPF_PROG_TYPE_XDP, + .fixup_map_event_output = { 4 }, + .result = ACCEPT, + .retval = 1, +}, +{ + "perfevent for socket filter", + .insns = { __PERF_EVENT_INSNS__ }, + .prog_type = BPF_PROG_TYPE_SOCKET_FILTER, + .fixup_map_event_output = { 4 }, + .result = ACCEPT, + .retval = 1, +}, +{ + "perfevent for sk_skb", + .insns = { __PERF_EVENT_INSNS__ }, + .prog_type = BPF_PROG_TYPE_SK_SKB, + .fixup_map_event_output = { 4 }, + .result = ACCEPT, + .retval = 1, +}, +{ + "perfevent for cgroup skb", + .insns = { __PERF_EVENT_INSNS__ }, + .prog_type = BPF_PROG_TYPE_CGROUP_SKB, + .fixup_map_event_output = { 4 }, + .result = ACCEPT, + .retval = 1, +}, -- 2.22.0.410.gd8fdbe21b5-goog