From patchwork Sat Feb 24 03:03:02 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kui-Feng Lee X-Patchwork-Id: 13570239 X-Patchwork-Delegate: bpf@iogearbox.net Received: from mail-yw1-f177.google.com (mail-yw1-f177.google.com [209.85.128.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 65FDE134B5 for ; Sat, 24 Feb 2024 03:03:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.177 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708743792; cv=none; b=u0P7SzTnufjXHIgV4oFknoB6y4vFoIfN+kG7GyUi7ak2vzfgaJP8zBrT7YQKyVlxHt1x7UBGH5Zv6+XOjgZJSJTRUbYFCuRLAo+n7zZa0J60gxPzidSTvbzMdQTgvpJpULf6e9+ANnfuF2hnERIThPLsJ4VgDpmXVHhmIZt3Z7o= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708743792; c=relaxed/simple; bh=6GRO6kPSGXqiAH/EjT5VLBpg0zjQANhjxF4UC3PUHJU=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=PZwChSmqxH290CZE9fED5KCFR8ODnAzH7B+yljgm1ioSQIkNl+ZusSMjUI/lJ5ttV1saQeG2LzF41iCRe9Ix40BLlgEmslsNVuwkRrm4Yk+ux/9SSpq3YuTDfZDUniRL4ICqmoMxjT3j1gIfadZmw7r1O+Hgz5oFqxx7FhJAuJg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=V7Ju8TTx; arc=none smtp.client-ip=209.85.128.177 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="V7Ju8TTx" Received: by mail-yw1-f177.google.com with SMTP id 00721157ae682-607bfa4c913so15762527b3.3 for ; Fri, 23 Feb 2024 19:03:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1708743789; x=1709348589; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=H0fCdm6t3+/GrYi+it9WNMMgcg+iH1aau2sIAxX+fSU=; b=V7Ju8TTxnFx67Ky23ckoElf4y3WcpnbY0KNnncdf79WmoL99BMy99usWXrOSLDPOXz WMBATISjJYUzEbatU4zMn2+1dy2zmLPCyqzOM7Q9DWLoLHvbytkeHzVE9Y/Nqseeh3tZ Abh8rl1NsLtr4CcTOSOLN0CA9rqHU1rCtJyOtsCVPL3L1xrpHcl/eqqbwjDJngsPO2nX PNUXcM2nPcfH5SYcmUg7KX7Shc3dFVwUapQo94pGEsNlr9knPDajrzHjNX2oz8In62H+ fmeJ9zoKEEz/McKNamLsfwA/QjKL6A9gKKHel2s4+0KQ/DoGZrHxh/1n2TuCfmTfN17Z HQDg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1708743789; x=1709348589; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=H0fCdm6t3+/GrYi+it9WNMMgcg+iH1aau2sIAxX+fSU=; b=UiiQKq69DlyJe05ig8bSsROgt3TAJ+v6ybCL8bSWn4bboij/fJERnm0xJj0+S0xrwq vch9yWDrkGvgSV6SuGm2xh3M0xYhd6h4x/CoFX/9JCM/RdLLBQS2XlsZy7D+ae/8vC05 HBua5WqdBgsVsLl4YCUg8PcLFhwS/4OHep11DqJKGlSE/0j+4sPZe7xeyuX502QoUzS/ FqVWZMbfMrsB+ziVKh7qsrRD5zBx1NPuzhnfCMk2JOZs/EdSDFQvB8dujTduz6fzZTvJ FARbZnAkq4B2H/T4FtQku4a1Nhs9IM/pd4tHjPHxfPQ2dHD1uq85ofn3BRXi27BpFYp2 3TwQ== X-Gm-Message-State: AOJu0YwOVVAP0csF9BptRgH4gHXrNlJG12P/JRg/mKJY0d7Je8EN0uQC ji1IOScJxZ09CrOAj28BeQ9ZHH2dCDcHwnQJLnuuJj28mcXA03eRd25nwtGm X-Google-Smtp-Source: AGHT+IHvtMQbef5hW+wfkdtDzZaQkFZ8qfOS7iYe/vvptV3HzyfHdpR/sXLss6mZZeJevrOWofI3uQ== X-Received: by 2002:a81:d203:0:b0:607:838f:8991 with SMTP id x3-20020a81d203000000b00607838f8991mr1571420ywi.38.1708743788890; Fri, 23 Feb 2024 19:03:08 -0800 (PST) Received: from kickker.attlocal.net ([2600:1700:6cf8:1240:f349:a51b:edf0:db7d]) by smtp.gmail.com with ESMTPSA id w66-20020a817b45000000b006087a2fc6b9sm84515ywc.101.2024.02.23.19.03.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 23 Feb 2024 19:03:08 -0800 (PST) From: Kui-Feng Lee To: bpf@vger.kernel.org, ast@kernel.org, martin.lau@linux.dev, song@kernel.org, kernel-team@meta.com, andrii@kernel.org Cc: sinquersw@gmail.com, kuifeng@meta.com, Kui-Feng Lee Subject: [PATCH bpf-next v3 3/3] selftests/bpf: Test struct_ops maps with a large number of program links. Date: Fri, 23 Feb 2024 19:03:02 -0800 Message-Id: <20240224030302.1500343-4-thinker.li@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240224030302.1500343-1-thinker.li@gmail.com> References: <20240224030302.1500343-1-thinker.li@gmail.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: bpf@iogearbox.net Create and load a struct_ops map with a large number of programs to generate trampolines taking a size over multiple pages. The map includes 40 programs. Their trampolines takes 6.6k+, more than 1.5 pages, on x86. Signed-off-by: Kui-Feng Lee --- .../selftests/bpf/bpf_testmod/bpf_testmod.h | 44 ++++++++ .../prog_tests/test_struct_ops_multi_pages.c | 30 ++++++ .../bpf/progs/struct_ops_multi_pages.c | 102 ++++++++++++++++++ 3 files changed, 176 insertions(+) create mode 100644 tools/testing/selftests/bpf/prog_tests/test_struct_ops_multi_pages.c create mode 100644 tools/testing/selftests/bpf/progs/struct_ops_multi_pages.c diff --git a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.h b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.h index c3b0cf788f9f..3e6481b2a50a 100644 --- a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.h +++ b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.h @@ -35,6 +35,50 @@ struct bpf_testmod_ops { void (*test_2)(int a, int b); /* Used to test nullable arguments. */ int (*test_maybe_null)(int dummy, struct task_struct *task); + + /* The following pointers are used to test the maps having multiple + * pages of trampolines. + */ + int (*tramp_1)(int value); + int (*tramp_2)(int value); + int (*tramp_3)(int value); + int (*tramp_4)(int value); + int (*tramp_5)(int value); + int (*tramp_6)(int value); + int (*tramp_7)(int value); + int (*tramp_8)(int value); + int (*tramp_9)(int value); + int (*tramp_10)(int value); + int (*tramp_11)(int value); + int (*tramp_12)(int value); + int (*tramp_13)(int value); + int (*tramp_14)(int value); + int (*tramp_15)(int value); + int (*tramp_16)(int value); + int (*tramp_17)(int value); + int (*tramp_18)(int value); + int (*tramp_19)(int value); + int (*tramp_20)(int value); + int (*tramp_21)(int value); + int (*tramp_22)(int value); + int (*tramp_23)(int value); + int (*tramp_24)(int value); + int (*tramp_25)(int value); + int (*tramp_26)(int value); + int (*tramp_27)(int value); + int (*tramp_28)(int value); + int (*tramp_29)(int value); + int (*tramp_30)(int value); + int (*tramp_31)(int value); + int (*tramp_32)(int value); + int (*tramp_33)(int value); + int (*tramp_34)(int value); + int (*tramp_35)(int value); + int (*tramp_36)(int value); + int (*tramp_37)(int value); + int (*tramp_38)(int value); + int (*tramp_39)(int value); + int (*tramp_40)(int value); }; #endif /* _BPF_TESTMOD_H */ diff --git a/tools/testing/selftests/bpf/prog_tests/test_struct_ops_multi_pages.c b/tools/testing/selftests/bpf/prog_tests/test_struct_ops_multi_pages.c new file mode 100644 index 000000000000..645d32b5160c --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/test_struct_ops_multi_pages.c @@ -0,0 +1,30 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */ +#include + +#include "struct_ops_multi_pages.skel.h" + +static void do_struct_ops_multi_pages(void) +{ + struct struct_ops_multi_pages *skel; + struct bpf_link *link; + + /* The size of all trampolines of skel->maps.multi_pages should be + * over 1 page (at least for x86). + */ + skel = struct_ops_multi_pages__open_and_load(); + if (!ASSERT_OK_PTR(skel, "struct_ops_multi_pages_open_and_load")) + return; + + link = bpf_map__attach_struct_ops(skel->maps.multi_pages); + ASSERT_OK_PTR(link, "attach_multi_pages"); + + bpf_link__destroy(link); + struct_ops_multi_pages__destroy(skel); +} + +void test_struct_ops_multi_pages(void) +{ + if (test__start_subtest("multi_pages")) + do_struct_ops_multi_pages(); +} diff --git a/tools/testing/selftests/bpf/progs/struct_ops_multi_pages.c b/tools/testing/selftests/bpf/progs/struct_ops_multi_pages.c new file mode 100644 index 000000000000..9efcc6e4d356 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/struct_ops_multi_pages.c @@ -0,0 +1,102 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */ +#include +#include +#include +#include "../bpf_testmod/bpf_testmod.h" + +char _license[] SEC("license") = "GPL"; + +#define TRAMP(x) \ + SEC("struct_ops/tramp_" #x) \ + int BPF_PROG(tramp_ ## x, int a) \ + { \ + return a; \ + } + +TRAMP(1) +TRAMP(2) +TRAMP(3) +TRAMP(4) +TRAMP(5) +TRAMP(6) +TRAMP(7) +TRAMP(8) +TRAMP(9) +TRAMP(10) +TRAMP(11) +TRAMP(12) +TRAMP(13) +TRAMP(14) +TRAMP(15) +TRAMP(16) +TRAMP(17) +TRAMP(18) +TRAMP(19) +TRAMP(20) +TRAMP(21) +TRAMP(22) +TRAMP(23) +TRAMP(24) +TRAMP(25) +TRAMP(26) +TRAMP(27) +TRAMP(28) +TRAMP(29) +TRAMP(30) +TRAMP(31) +TRAMP(32) +TRAMP(33) +TRAMP(34) +TRAMP(35) +TRAMP(36) +TRAMP(37) +TRAMP(38) +TRAMP(39) +TRAMP(40) + +#define F_TRAMP(x) .tramp_ ## x = (void *)tramp_ ## x + +SEC(".struct_ops.link") +struct bpf_testmod_ops multi_pages = { + F_TRAMP(1), + F_TRAMP(2), + F_TRAMP(3), + F_TRAMP(4), + F_TRAMP(5), + F_TRAMP(6), + F_TRAMP(7), + F_TRAMP(8), + F_TRAMP(9), + F_TRAMP(10), + F_TRAMP(11), + F_TRAMP(12), + F_TRAMP(13), + F_TRAMP(14), + F_TRAMP(15), + F_TRAMP(16), + F_TRAMP(17), + F_TRAMP(18), + F_TRAMP(19), + F_TRAMP(20), + F_TRAMP(21), + F_TRAMP(22), + F_TRAMP(23), + F_TRAMP(24), + F_TRAMP(25), + F_TRAMP(26), + F_TRAMP(27), + F_TRAMP(28), + F_TRAMP(29), + F_TRAMP(30), + F_TRAMP(31), + F_TRAMP(32), + F_TRAMP(33), + F_TRAMP(34), + F_TRAMP(35), + F_TRAMP(36), + F_TRAMP(37), + F_TRAMP(38), + F_TRAMP(39), + F_TRAMP(40), +};