From patchwork Sat Oct 31 18:52:37 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Duyck X-Patchwork-Id: 315901 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=-9.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED 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 90D36C388F7 for ; Sat, 31 Oct 2020 18:52:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5716C205ED for ; Sat, 31 Oct 2020 18:52:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="cszZRhcV" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728524AbgJaSwl (ORCPT ); Sat, 31 Oct 2020 14:52:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43472 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728509AbgJaSwj (ORCPT ); Sat, 31 Oct 2020 14:52:39 -0400 Received: from mail-pl1-x642.google.com (mail-pl1-x642.google.com [IPv6:2607:f8b0:4864:20::642]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 04560C0617A6; Sat, 31 Oct 2020 11:52:39 -0700 (PDT) Received: by mail-pl1-x642.google.com with SMTP id x23so4656537plr.6; Sat, 31 Oct 2020 11:52:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:from:to:cc:date:message-id:in-reply-to:references :user-agent:mime-version:content-transfer-encoding; bh=I96VLPIrP16XF5vdzS0wcA+n2qxCuVr7xCXtdirj7lw=; b=cszZRhcVmB6jw9nfVJ5W8S2eHz48WiJMtaR3QIzVLQKgTrbAJHscqRYIx+M8o6G2Gi DIzgfrP9f+D9SSBwo9mQkkG3h3WeyEG/bN7nUDJUxf0ty8J/exUDzv8/iLezsw8czryJ nOHis2u/ZsU1ngqtn8RrHXDN8h3/qxD7zaQLcqy3rGZaHQR6m48JpXamptPC9G68m3FE 1Q4/N0s+KjIbw5wIgYWmhaVXeU/TgdC9tHNxZODlRXpodpyS+45IQq2MCLuUOKjmiX8a R0Zw41EpwrJBi3OFRwWeUQZwex4OTLdpxPFzX7xPZ4bvAllZ/XYCIPLiCQT9vUAsYNGS G+4w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:from:to:cc:date:message-id:in-reply-to :references:user-agent:mime-version:content-transfer-encoding; bh=I96VLPIrP16XF5vdzS0wcA+n2qxCuVr7xCXtdirj7lw=; b=pYEbL+OpL/AN38PKK0YJzezO82N6PKLf8BnYl3vm3Z5CHJx0N/dee3gce4YBWXWGmB lgeZaIElBoDTWvbdzYYW9dn6GRHOr9rdSSxbWTU+Ve7fS9KLxa9Na5fkhVyOoxdE5eRE RCmdrD6Ld26l1Kjs0O8w6b6iRfB8kHkQMwhlG2lHU/zekIpfiusyyxxhUTGf5sH1C7/q 12fDSwfTAuXUnV/VRaDmzqhNr3zghzmBGssGBXXe2LgQXxuh7q7xKgzZ+/IIm4np7jdJ g8VZW+eT3VThJH2LO+IIofCQIpXCCbq6/zL3hf4YihV5Um+/y+tIcSffBP2DhwChnq+9 Il8A== X-Gm-Message-State: AOAM533pKtWp/+7snULaJ7jYudI3ssbMhIMTcX+56DRXBj8ynBw4jdhc zGQ3soFhxCYZOUDMxkcLOMs= X-Google-Smtp-Source: ABdhPJwPJqfhPi2xr6HgyNVDwUrcRhSnATc8M0vjTWey/AHVtQNum2be7mFsvvHAKmgrNlXoeA0cVQ== X-Received: by 2002:a17:902:6bc4:b029:d5:ef85:1a63 with SMTP id m4-20020a1709026bc4b02900d5ef851a63mr14524114plt.73.1604170358485; Sat, 31 Oct 2020 11:52:38 -0700 (PDT) Received: from localhost.localdomain ([2001:470:b:9c3:9e5c:8eff:fe4f:f2d0]) by smtp.gmail.com with ESMTPSA id l199sm9511115pfd.73.2020.10.31.11.52.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 31 Oct 2020 11:52:38 -0700 (PDT) Subject: [bpf-next PATCH v2 5/5] selftest/bpf: Use global variables instead of maps for test_tcpbpf_kern From: Alexander Duyck To: bpf@vger.kernel.org Cc: ast@kernel.org, daniel@iogearbox.net, kafai@fb.com, john.fastabend@gmail.com, kernel-team@fb.com, netdev@vger.kernel.org, edumazet@google.com, brakmo@fb.com, andrii.nakryiko@gmail.com, alexanderduyck@fb.com Date: Sat, 31 Oct 2020 11:52:37 -0700 Message-ID: <160417035730.2823.6697632421519908152.stgit@localhost.localdomain> In-Reply-To: <160416890683.710453.7723265174628409401.stgit@localhost.localdomain> References: <160416890683.710453.7723265174628409401.stgit@localhost.localdomain> User-Agent: StGit/0.23 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Alexander Duyck Use global variables instead of global_map and sockopt_results_map to track test data. Doing this greatly simplifies the code as there is not need to take the extra steps of updating the maps or looking up elements. Suggested-by: Martin KaFai Lau Signed-off-by: Alexander Duyck Acked-by: Martin KaFai Lau --- .../testing/selftests/bpf/prog_tests/tcpbpf_user.c | 53 ++++-------- .../testing/selftests/bpf/progs/test_tcpbpf_kern.c | 86 +++----------------- tools/testing/selftests/bpf/test_tcpbpf.h | 2 3 files changed, 31 insertions(+), 110 deletions(-) diff --git a/tools/testing/selftests/bpf/prog_tests/tcpbpf_user.c b/tools/testing/selftests/bpf/prog_tests/tcpbpf_user.c index c7a61b0d616a..bceca6fce09a 100644 --- a/tools/testing/selftests/bpf/prog_tests/tcpbpf_user.c +++ b/tools/testing/selftests/bpf/prog_tests/tcpbpf_user.c @@ -11,7 +11,7 @@ static __u32 duration; -static void verify_result(int map_fd, int sock_map_fd) +static void verify_result(struct tcpbpf_globals *result) { __u32 expected_events = ((1 << BPF_SOCK_OPS_TIMEOUT_INIT) | (1 << BPF_SOCK_OPS_RWND_INIT) | @@ -21,48 +21,31 @@ static void verify_result(int map_fd, int sock_map_fd) (1 << BPF_SOCK_OPS_NEEDS_ECN) | (1 << BPF_SOCK_OPS_STATE_CB) | (1 << BPF_SOCK_OPS_TCP_LISTEN_CB)); - struct tcpbpf_globals result = { 0 }; - __u32 key = 0; - int res; - int rv; - - rv = bpf_map_lookup_elem(map_fd, &key, &result); - if (CHECK(rv, "bpf_map_lookup_elem(map_fd)", "err:%d errno:%d", - rv, errno)) - return; /* check global map */ - CHECK(expected_events != result.event_map, "event_map", + CHECK(expected_events != result->event_map, "event_map", "unexpected event_map: actual %#" PRIx32" != expected %#" PRIx32 "\n", - result.event_map, expected_events); + result->event_map, expected_events); - ASSERT_EQ(result.bytes_received, 501, "bytes_received"); - ASSERT_EQ(result.bytes_acked, 1002, "bytes_acked"); - ASSERT_EQ(result.data_segs_in, 1, "data_segs_in"); - ASSERT_EQ(result.data_segs_out, 1, "data_segs_out"); - ASSERT_EQ(result.bad_cb_test_rv, 0x80, "bad_cb_test_rv"); - ASSERT_EQ(result.good_cb_test_rv, 0, "good_cb_test_rv"); - ASSERT_EQ(result.num_listen, 1, "num_listen"); + ASSERT_EQ(result->bytes_received, 501, "bytes_received"); + ASSERT_EQ(result->bytes_acked, 1002, "bytes_acked"); + ASSERT_EQ(result->data_segs_in, 1, "data_segs_in"); + ASSERT_EQ(result->data_segs_out, 1, "data_segs_out"); + ASSERT_EQ(result->bad_cb_test_rv, 0x80, "bad_cb_test_rv"); + ASSERT_EQ(result->good_cb_test_rv, 0, "good_cb_test_rv"); + ASSERT_EQ(result->num_listen, 1, "num_listen"); /* 3 comes from one listening socket + both ends of the connection */ - ASSERT_EQ(result.num_close_events, 3, "num_close_events"); + ASSERT_EQ(result->num_close_events, 3, "num_close_events"); /* check setsockopt for SAVE_SYN */ - key = 0; - rv = bpf_map_lookup_elem(sock_map_fd, &key, &res); - CHECK(rv, "bpf_map_lookup_elem(sock_map_fd)", "err:%d errno:%d", - rv, errno); - ASSERT_EQ(res, 0, "bpf_setsockopt(TCP_SAVE_SYN)"); + ASSERT_EQ(result->tcp_save_syn, 0, "tcp_save_syn"); /* check getsockopt for SAVED_SYN */ - key = 1; - rv = bpf_map_lookup_elem(sock_map_fd, &key, &res); - CHECK(rv, "bpf_map_lookup_elem(sock_map_fd)", "err:%d errno:%d", - rv, errno); - ASSERT_EQ(res, 1, "bpf_getsockopt(TCP_SAVED_SYN)"); + ASSERT_EQ(result->tcp_saved_syn, 1, "tcp_saved_syn"); } -static void run_test(int map_fd, int sock_map_fd) +static void run_test(struct tcpbpf_globals *result) { int listen_fd = -1, cli_fd = -1, accept_fd = -1; char buf[1000]; @@ -129,13 +112,12 @@ static void run_test(int map_fd, int sock_map_fd) close(listen_fd); if (!err) - verify_result(map_fd, sock_map_fd); + verify_result(result); } void test_tcpbpf_user(void) { struct test_tcpbpf_kern *skel; - int map_fd, sock_map_fd; int cg_fd = -1; skel = test_tcpbpf_kern__open_and_load(); @@ -147,14 +129,11 @@ void test_tcpbpf_user(void) "cg_fd:%d errno:%d", cg_fd, errno)) goto cleanup_skel; - map_fd = bpf_map__fd(skel->maps.global_map); - sock_map_fd = bpf_map__fd(skel->maps.sockopt_results); - skel->links.bpf_testcb = bpf_program__attach_cgroup(skel->progs.bpf_testcb, cg_fd); if (ASSERT_OK_PTR(skel->links.bpf_testcb, "attach_cgroup(bpf_testcb)")) goto cleanup_namespace; - run_test(map_fd, sock_map_fd); + run_test(&skel->bss->global); cleanup_namespace: if (cg_fd != -1) diff --git a/tools/testing/selftests/bpf/progs/test_tcpbpf_kern.c b/tools/testing/selftests/bpf/progs/test_tcpbpf_kern.c index 3e6912e4df3d..c0250142e1f6 100644 --- a/tools/testing/selftests/bpf/progs/test_tcpbpf_kern.c +++ b/tools/testing/selftests/bpf/progs/test_tcpbpf_kern.c @@ -14,40 +14,7 @@ #include #include "test_tcpbpf.h" -struct { - __uint(type, BPF_MAP_TYPE_ARRAY); - __uint(max_entries, 4); - __type(key, __u32); - __type(value, struct tcpbpf_globals); -} global_map SEC(".maps"); - -struct { - __uint(type, BPF_MAP_TYPE_ARRAY); - __uint(max_entries, 2); - __type(key, __u32); - __type(value, int); -} sockopt_results SEC(".maps"); - -static inline void update_event_map(int event) -{ - __u32 key = 0; - struct tcpbpf_globals g, *gp; - - gp = bpf_map_lookup_elem(&global_map, &key); - if (gp == NULL) { - struct tcpbpf_globals g = {0}; - - g.event_map |= (1 << event); - bpf_map_update_elem(&global_map, &key, &g, - BPF_ANY); - } else { - g = *gp; - g.event_map |= (1 << event); - bpf_map_update_elem(&global_map, &key, &g, - BPF_ANY); - } -} - +struct tcpbpf_globals global = { 0 }; int _version SEC("version") = 1; SEC("sockops") @@ -105,29 +72,15 @@ int bpf_testcb(struct bpf_sock_ops *skops) op = (int) skops->op; - update_event_map(op); + global.event_map |= (1 << op); switch (op) { case BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB: /* Test failure to set largest cb flag (assumes not defined) */ - bad_call_rv = bpf_sock_ops_cb_flags_set(skops, 0x80); + global.bad_cb_test_rv = bpf_sock_ops_cb_flags_set(skops, 0x80); /* Set callback */ - good_call_rv = bpf_sock_ops_cb_flags_set(skops, + global.good_cb_test_rv = bpf_sock_ops_cb_flags_set(skops, BPF_SOCK_OPS_STATE_CB_FLAG); - /* Update results */ - { - __u32 key = 0; - struct tcpbpf_globals g, *gp; - - gp = bpf_map_lookup_elem(&global_map, &key); - if (!gp) - break; - g = *gp; - g.bad_cb_test_rv = bad_call_rv; - g.good_cb_test_rv = good_call_rv; - bpf_map_update_elem(&global_map, &key, &g, - BPF_ANY); - } break; case BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB: skops->sk_txhash = 0x12345f; @@ -143,10 +96,8 @@ int bpf_testcb(struct bpf_sock_ops *skops) thdr = (struct tcphdr *)(header + offset); v = thdr->syn; - __u32 key = 1; - bpf_map_update_elem(&sockopt_results, &key, &v, - BPF_ANY); + global.tcp_saved_syn = v; } } break; @@ -156,25 +107,16 @@ int bpf_testcb(struct bpf_sock_ops *skops) break; case BPF_SOCK_OPS_STATE_CB: if (skops->args[1] == BPF_TCP_CLOSE) { - __u32 key = 0; - struct tcpbpf_globals g, *gp; - - gp = bpf_map_lookup_elem(&global_map, &key); - if (!gp) - break; - g = *gp; if (skops->args[0] == BPF_TCP_LISTEN) { - g.num_listen++; + global.num_listen++; } else { - g.total_retrans = skops->total_retrans; - g.data_segs_in = skops->data_segs_in; - g.data_segs_out = skops->data_segs_out; - g.bytes_received = skops->bytes_received; - g.bytes_acked = skops->bytes_acked; + global.total_retrans = skops->total_retrans; + global.data_segs_in = skops->data_segs_in; + global.data_segs_out = skops->data_segs_out; + global.bytes_received = skops->bytes_received; + global.bytes_acked = skops->bytes_acked; } - g.num_close_events++; - bpf_map_update_elem(&global_map, &key, &g, - BPF_ANY); + global.num_close_events++; } break; case BPF_SOCK_OPS_TCP_LISTEN_CB: @@ -182,9 +124,7 @@ int bpf_testcb(struct bpf_sock_ops *skops) v = bpf_setsockopt(skops, IPPROTO_TCP, TCP_SAVE_SYN, &save_syn, sizeof(save_syn)); /* Update global map w/ result of setsock opt */ - __u32 key = 0; - - bpf_map_update_elem(&sockopt_results, &key, &v, BPF_ANY); + global.tcp_save_syn = v; break; default: rv = -1; diff --git a/tools/testing/selftests/bpf/test_tcpbpf.h b/tools/testing/selftests/bpf/test_tcpbpf.h index 6220b95cbd02..0ed33521cbbb 100644 --- a/tools/testing/selftests/bpf/test_tcpbpf.h +++ b/tools/testing/selftests/bpf/test_tcpbpf.h @@ -14,5 +14,7 @@ struct tcpbpf_globals { __u64 bytes_acked; __u32 num_listen; __u32 num_close_events; + __u32 tcp_save_syn; + __u32 tcp_saved_syn; }; #endif