From patchwork Tue Feb 9 19:48:56 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexei Starovoitov X-Patchwork-Id: 12079169 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=-15.8 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 13AEEC433E9 for ; Tue, 9 Feb 2021 21:01:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CAA9C64E6F for ; Tue, 9 Feb 2021 21:01:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234228AbhBIU6E (ORCPT ); Tue, 9 Feb 2021 15:58:04 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38928 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234053AbhBIUtj (ORCPT ); Tue, 9 Feb 2021 15:49:39 -0500 Received: from mail-pg1-x531.google.com (mail-pg1-x531.google.com [IPv6:2607:f8b0:4864:20::531]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 571BBC061A86 for ; Tue, 9 Feb 2021 11:49:10 -0800 (PST) Received: by mail-pg1-x531.google.com with SMTP id o7so13179058pgl.1 for ; Tue, 09 Feb 2021 11:49:10 -0800 (PST) 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=4VaKfGywaG+qquwOXdd9aHLw00AX3G7ubALIgBFTaBM=; b=TXQJZGwln1+OM6wVN1PkN/c5i+AA/DHY4e5mqGKbEfW/RD0Qa6RwjPIX5WqdS4WNKg BheZJIayKhwWeAqgWjQ9HyILpOm7IFr9J6EnhUYiar8CBRmh5i0K8GB8REvS7BuQ55r5 1cb6hKwdYmB9hfek33KqjKi4QiLX94IEl6v69l409GvDjnycBPX4iZXYTTSRSrMfYPPq /dAHFCHjzueW47lLi5VKzJ3wXfJFF+F4BpuZhw6twuCwQcuSCCoaNNbrlL3ZOE8WRESq v+s/RBVJ9YX5aSMk90DtMzlcJ+i0G3fVi11GagOfx+h2WL+XPAnFYVNgQfgVVE9yv+Ev 5Vag== 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=4VaKfGywaG+qquwOXdd9aHLw00AX3G7ubALIgBFTaBM=; b=l4j5AZi9LCTjKDoDMrugPlqEgnzWTQ4j7DLyht6h8F75Id+qNiqxofFQ3pBQtDCjky 3akge0vEz9/hVy+VgSP85rEXJIOfuw4vNtp0TkESUGdA//vabbz+T0u3P4IJ7TdVscw1 9B1Mg4HGzpbCZOWdCtQREA5CMPBHaR3+GwM0HQ6PkiY/wmDgbPzb2gNX37JzyOF4NFlG 0a9iLoz/AR/D1PmKLBqZa10D0DLc/PvI4TXsri0jiDJhGBd9M2hNPa4zY4CvRF00Ag0s ZWUuDDOi/WsAwIngN1rW23A7+OYwbL0EQQ35SeDCCiRH0CWIYNhZU8kR6jHDi1LYOMpS RXzA== X-Gm-Message-State: AOAM530MtBh2X+F2wRuD8jR094eR0dcz7JPMU5WOgBPrjMp9XPal5gPv L+W9PxKQ514cTQEbQrhAOXrVYZMzvS4= X-Google-Smtp-Source: ABdhPJxV1zkpKFFYWRJSacoywC3T3xw/bniSWsKeNUQ5wf2N6zTp65MfEEGY3zCls19xFF4vUgo+PA== X-Received: by 2002:a63:8f59:: with SMTP id r25mr18233891pgn.161.1612900150006; Tue, 09 Feb 2021 11:49:10 -0800 (PST) Received: from ast-mbp.thefacebook.com ([163.114.132.7]) by smtp.gmail.com with ESMTPSA id j22sm139123pff.57.2021.02.09.11.49.08 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 09 Feb 2021 11:49:09 -0800 (PST) From: Alexei Starovoitov To: davem@davemloft.net Cc: daniel@iogearbox.net, bpf@vger.kernel.org, kernel-team@fb.com Subject: [PATCH v3 bpf-next 8/8] selftests/bpf: Add a test for map-in-map and per-cpu maps in sleepable progs Date: Tue, 9 Feb 2021 11:48:56 -0800 Message-Id: <20210209194856.24269-9-alexei.starovoitov@gmail.com> X-Mailer: git-send-email 2.13.5 In-Reply-To: <20210209194856.24269-1-alexei.starovoitov@gmail.com> References: <20210209194856.24269-1-alexei.starovoitov@gmail.com> Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net From: Alexei Starovoitov Add a basic test for map-in-map and per-cpu maps in sleepable programs. Signed-off-by: Alexei Starovoitov Acked-by: Andrii Nakryiko Acked-by: KP Singh --- tools/testing/selftests/bpf/progs/lsm.c | 69 +++++++++++++++++++++++++ 1 file changed, 69 insertions(+) diff --git a/tools/testing/selftests/bpf/progs/lsm.c b/tools/testing/selftests/bpf/progs/lsm.c index ff4d343b94b5..33694ef8acfa 100644 --- a/tools/testing/selftests/bpf/progs/lsm.c +++ b/tools/testing/selftests/bpf/progs/lsm.c @@ -30,6 +30,53 @@ struct { __type(value, __u64); } lru_hash SEC(".maps"); +struct { + __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY); + __uint(max_entries, 1); + __type(key, __u32); + __type(value, __u64); +} percpu_array SEC(".maps"); + +struct { + __uint(type, BPF_MAP_TYPE_PERCPU_HASH); + __uint(max_entries, 1); + __type(key, __u32); + __type(value, __u64); +} percpu_hash SEC(".maps"); + +struct { + __uint(type, BPF_MAP_TYPE_LRU_PERCPU_HASH); + __uint(max_entries, 1); + __type(key, __u32); + __type(value, __u64); +} lru_percpu_hash SEC(".maps"); + +struct inner_map { + __uint(type, BPF_MAP_TYPE_ARRAY); + __uint(max_entries, 1); + __type(key, int); + __type(value, __u64); +} inner_map SEC(".maps"); + +struct outer_arr { + __uint(type, BPF_MAP_TYPE_ARRAY_OF_MAPS); + __uint(max_entries, 1); + __uint(key_size, sizeof(int)); + __uint(value_size, sizeof(int)); + __array(values, struct inner_map); +} outer_arr SEC(".maps") = { + .values = { [0] = &inner_map }, +}; + +struct outer_hash { + __uint(type, BPF_MAP_TYPE_HASH_OF_MAPS); + __uint(max_entries, 1); + __uint(key_size, sizeof(int)); + __array(values, struct inner_map); +} outer_hash SEC(".maps") = { + .values = { [0] = &inner_map }, +}; + char _license[] SEC("license") = "GPL"; int monitored_pid = 0; @@ -61,6 +108,7 @@ SEC("lsm.s/bprm_committed_creds") int BPF_PROG(test_void_hook, struct linux_binprm *bprm) { __u32 pid = bpf_get_current_pid_tgid() >> 32; + struct inner_map *inner_map; char args[64]; __u32 key = 0; __u64 *value; @@ -80,6 +128,27 @@ int BPF_PROG(test_void_hook, struct linux_binprm *bprm) value = bpf_map_lookup_elem(&lru_hash, &key); if (value) *value = 0; + value = bpf_map_lookup_elem(&percpu_array, &key); + if (value) + *value = 0; + value = bpf_map_lookup_elem(&percpu_hash, &key); + if (value) + *value = 0; + value = bpf_map_lookup_elem(&lru_percpu_hash, &key); + if (value) + *value = 0; + inner_map = bpf_map_lookup_elem(&outer_arr, &key); + if (inner_map) { + value = bpf_map_lookup_elem(inner_map, &key); + if (value) + *value = 0; + } + inner_map = bpf_map_lookup_elem(&outer_hash, &key); + if (inner_map) { + value = bpf_map_lookup_elem(inner_map, &key); + if (value) + *value = 0; + } return 0; }