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[23.128.96.18]) by mx.google.com with ESMTP id e7si8300jam.26.2021.05.26.12.08.57; Wed, 26 May 2021 12:09:10 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@chromium.org header.s=google header.b=dLlVD7mH; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=chromium.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234392AbhEZQsd (ORCPT + 99 others); Wed, 26 May 2021 12:48:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36716 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231843AbhEZQsb (ORCPT ); Wed, 26 May 2021 12:48:31 -0400 Received: from mail-wm1-x32e.google.com (mail-wm1-x32e.google.com [IPv6:2a00:1450:4864:20::32e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 39EA9C061574 for ; Wed, 26 May 2021 09:47:00 -0700 (PDT) Received: by mail-wm1-x32e.google.com with SMTP id u5-20020a7bc0450000b02901480e40338bso3664652wmc.1 for ; Wed, 26 May 2021 09:47:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=s9T7kB/4xsZojsHos+JlIHomT+VfHYRLasgOPGcnQKM=; b=dLlVD7mH/La1fyulYhBqxDbuI9M9AN04II1gFWaM4v0eTJelx/fdlq/7J9VxhajcDX /nMYrDPpkqQxqZdKe8N1O0smQTvAmsz+zuECsedzojw32MUpxXQl0EowQCWKBq0JhPNv 5z35+yPJnINzjnMidUoU9TxV5EGhxwjy45frs= 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:mime-version :content-transfer-encoding; bh=s9T7kB/4xsZojsHos+JlIHomT+VfHYRLasgOPGcnQKM=; b=WqYctsK8hMcIfe41icQotqt5nq5ldr+9yDjzWn2Mqk/kRGwgyasA1b+gkiQY4opU8k NllCVDnjpIkumRimueH/dPSU3dmliW/csCcaRVE+odN0kz8zdFYzB//5XxFgYW3VZrIh 7U6IEaPYYDPsR/lZUmxQ4CvJGVLP+WuRJYOxU04Mb3ZwaigZ62aXN+dEzTE5F/n33V37 VC511TZGJs5HvihReXt2rRw+ukKN5j3ibNwC4fxGX27kNB71VC/301aVgk2FgLuNAFQt Slz7xdgcqsPGrLnFRU2/u4mZt3ww8yxoCulBz+XXMh2xZT9FjNMaOiyW+xtroTMdgoFX es6Q== X-Gm-Message-State: AOAM532Lv7DN3Sf+RQESJg83otF/wMS7CZJUZjnoMNByGn++NSU6sO5u /F+d6Dtmsj8Rro0txEpWheGEnw== X-Received: by 2002:a1c:f705:: with SMTP id v5mr4387202wmh.69.1622047618755; Wed, 26 May 2021 09:46:58 -0700 (PDT) Received: from revest.zrh.corp.google.com ([2a00:79e0:61:302:5204:ceed:e340:def7]) by smtp.gmail.com with ESMTPSA id y6sm7200089wmy.23.2021.05.26.09.46.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 26 May 2021 09:46:58 -0700 (PDT) From: Florent Revest To: bpf@vger.kernel.org Cc: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, kpsingh@kernel.org, jackmanb@google.com, linux-kernel@vger.kernel.org, Florent Revest Subject: [PATCH bpf-next v3] libbpf: Move BPF_SEQ_PRINTF and BPF_SNPRINTF to bpf_helpers.h Date: Wed, 26 May 2021 18:46:43 +0200 Message-Id: <20210526164643.2881368-1-revest@chromium.org> X-Mailer: git-send-email 2.31.1.818.g46aad6cb9e-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org These macros are convenient wrappers around the bpf_seq_printf and bpf_snprintf helpers. They are currently provided by bpf_tracing.h which targets low level tracing primitives. bpf_helpers.h is a better fit. The __bpf_narg and __bpf_apply are needed in both files and provided twice. __bpf_empty isn't used anywhere and is removed from bpf_tracing.h Reported-by: Andrii Nakryiko Signed-off-by: Florent Revest --- kernel/bpf/preload/iterators/iterators.bpf.c | 1 - tools/lib/bpf/bpf_helpers.h | 66 +++++++++++++++++++ tools/lib/bpf/bpf_tracing.h | 62 +++-------------- .../bpf/progs/bpf_iter_bpf_hash_map.c | 1 - .../selftests/bpf/progs/bpf_iter_bpf_map.c | 1 - .../selftests/bpf/progs/bpf_iter_ipv6_route.c | 1 - .../selftests/bpf/progs/bpf_iter_netlink.c | 1 - .../selftests/bpf/progs/bpf_iter_task.c | 1 - .../selftests/bpf/progs/bpf_iter_task_btf.c | 1 - .../selftests/bpf/progs/bpf_iter_task_file.c | 1 - .../selftests/bpf/progs/bpf_iter_task_stack.c | 1 - .../selftests/bpf/progs/bpf_iter_task_vma.c | 1 - .../selftests/bpf/progs/bpf_iter_tcp4.c | 1 - .../selftests/bpf/progs/bpf_iter_tcp6.c | 1 - .../selftests/bpf/progs/bpf_iter_udp4.c | 1 - .../selftests/bpf/progs/bpf_iter_udp6.c | 1 - .../selftests/bpf/progs/test_snprintf.c | 1 - 17 files changed, 74 insertions(+), 69 deletions(-) diff --git a/kernel/bpf/preload/iterators/iterators.bpf.c b/kernel/bpf/preload/iterators/iterators.bpf.c index 52aa7b38e8b8..03af863314ea 100644 --- a/kernel/bpf/preload/iterators/iterators.bpf.c +++ b/kernel/bpf/preload/iterators/iterators.bpf.c @@ -2,7 +2,6 @@ /* Copyright (c) 2020 Facebook */ #include #include -#include #include #pragma clang attribute push (__attribute__((preserve_access_index)), apply_to = record) diff --git a/tools/lib/bpf/bpf_helpers.h b/tools/lib/bpf/bpf_helpers.h index 9720dc0b4605..b9987c3efa3c 100644 --- a/tools/lib/bpf/bpf_helpers.h +++ b/tools/lib/bpf/bpf_helpers.h @@ -158,4 +158,70 @@ enum libbpf_tristate { #define __kconfig __attribute__((section(".kconfig"))) #define __ksym __attribute__((section(".ksyms"))) +#ifndef ___bpf_concat +#define ___bpf_concat(a, b) a ## b +#endif +#ifndef ___bpf_apply +#define ___bpf_apply(fn, n) ___bpf_concat(fn, n) +#endif +#ifndef ___bpf_nth +#define ___bpf_nth(_, _1, _2, _3, _4, _5, _6, _7, _8, _9, _a, _b, _c, N, ...) N +#endif +#ifndef ___bpf_narg +#define ___bpf_narg(...) \ + ___bpf_nth(_, ##__VA_ARGS__, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0) +#endif + +#define ___bpf_fill0(arr, p, x) do {} while (0) +#define ___bpf_fill1(arr, p, x) arr[p] = x +#define ___bpf_fill2(arr, p, x, args...) arr[p] = x; ___bpf_fill1(arr, p + 1, args) +#define ___bpf_fill3(arr, p, x, args...) arr[p] = x; ___bpf_fill2(arr, p + 1, args) +#define ___bpf_fill4(arr, p, x, args...) arr[p] = x; ___bpf_fill3(arr, p + 1, args) +#define ___bpf_fill5(arr, p, x, args...) arr[p] = x; ___bpf_fill4(arr, p + 1, args) +#define ___bpf_fill6(arr, p, x, args...) arr[p] = x; ___bpf_fill5(arr, p + 1, args) +#define ___bpf_fill7(arr, p, x, args...) arr[p] = x; ___bpf_fill6(arr, p + 1, args) +#define ___bpf_fill8(arr, p, x, args...) arr[p] = x; ___bpf_fill7(arr, p + 1, args) +#define ___bpf_fill9(arr, p, x, args...) arr[p] = x; ___bpf_fill8(arr, p + 1, args) +#define ___bpf_fill10(arr, p, x, args...) arr[p] = x; ___bpf_fill9(arr, p + 1, args) +#define ___bpf_fill11(arr, p, x, args...) arr[p] = x; ___bpf_fill10(arr, p + 1, args) +#define ___bpf_fill12(arr, p, x, args...) arr[p] = x; ___bpf_fill11(arr, p + 1, args) +#define ___bpf_fill(arr, args...) \ + ___bpf_apply(___bpf_fill, ___bpf_narg(args))(arr, 0, args) + +/* + * BPF_SEQ_PRINTF to wrap bpf_seq_printf to-be-printed values + * in a structure. + */ +#define BPF_SEQ_PRINTF(seq, fmt, args...) \ +({ \ + static const char ___fmt[] = fmt; \ + unsigned long long ___param[___bpf_narg(args)]; \ + \ + _Pragma("GCC diagnostic push") \ + _Pragma("GCC diagnostic ignored \"-Wint-conversion\"") \ + ___bpf_fill(___param, args); \ + _Pragma("GCC diagnostic pop") \ + \ + bpf_seq_printf(seq, ___fmt, sizeof(___fmt), \ + ___param, sizeof(___param)); \ +}) + +/* + * BPF_SNPRINTF wraps the bpf_snprintf helper with variadic arguments instead of + * an array of u64. + */ +#define BPF_SNPRINTF(out, out_size, fmt, args...) \ +({ \ + static const char ___fmt[] = fmt; \ + unsigned long long ___param[___bpf_narg(args)]; \ + \ + _Pragma("GCC diagnostic push") \ + _Pragma("GCC diagnostic ignored \"-Wint-conversion\"") \ + ___bpf_fill(___param, args); \ + _Pragma("GCC diagnostic pop") \ + \ + bpf_snprintf(out, out_size, ___fmt, \ + ___param, sizeof(___param)); \ +}) + #endif diff --git a/tools/lib/bpf/bpf_tracing.h b/tools/lib/bpf/bpf_tracing.h index 8c954ebc0c7c..c0f3a26aa582 100644 --- a/tools/lib/bpf/bpf_tracing.h +++ b/tools/lib/bpf/bpf_tracing.h @@ -295,13 +295,19 @@ struct pt_regs; (void *)(PT_REGS_FP(ctx) + sizeof(ip))); }) #endif +#ifndef ___bpf_concat #define ___bpf_concat(a, b) a ## b +#endif +#ifndef ___bpf_apply #define ___bpf_apply(fn, n) ___bpf_concat(fn, n) +#endif +#ifndef ___bpf_nth #define ___bpf_nth(_, _1, _2, _3, _4, _5, _6, _7, _8, _9, _a, _b, _c, N, ...) N +#endif +#ifndef ___bpf_narg #define ___bpf_narg(...) \ ___bpf_nth(_, ##__VA_ARGS__, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0) -#define ___bpf_empty(...) \ - ___bpf_nth(_, ##__VA_ARGS__, N, N, N, N, N, N, N, N, N, N, 0) +#endif #define ___bpf_ctx_cast0() ctx #define ___bpf_ctx_cast1(x) ___bpf_ctx_cast0(), (void *)ctx[0] @@ -413,56 +419,4 @@ typeof(name(0)) name(struct pt_regs *ctx) \ } \ static __always_inline typeof(name(0)) ____##name(struct pt_regs *ctx, ##args) -#define ___bpf_fill0(arr, p, x) do {} while (0) -#define ___bpf_fill1(arr, p, x) arr[p] = x -#define ___bpf_fill2(arr, p, x, args...) arr[p] = x; ___bpf_fill1(arr, p + 1, args) -#define ___bpf_fill3(arr, p, x, args...) arr[p] = x; ___bpf_fill2(arr, p + 1, args) -#define ___bpf_fill4(arr, p, x, args...) arr[p] = x; ___bpf_fill3(arr, p + 1, args) -#define ___bpf_fill5(arr, p, x, args...) arr[p] = x; ___bpf_fill4(arr, p + 1, args) -#define ___bpf_fill6(arr, p, x, args...) arr[p] = x; ___bpf_fill5(arr, p + 1, args) -#define ___bpf_fill7(arr, p, x, args...) arr[p] = x; ___bpf_fill6(arr, p + 1, args) -#define ___bpf_fill8(arr, p, x, args...) arr[p] = x; ___bpf_fill7(arr, p + 1, args) -#define ___bpf_fill9(arr, p, x, args...) arr[p] = x; ___bpf_fill8(arr, p + 1, args) -#define ___bpf_fill10(arr, p, x, args...) arr[p] = x; ___bpf_fill9(arr, p + 1, args) -#define ___bpf_fill11(arr, p, x, args...) arr[p] = x; ___bpf_fill10(arr, p + 1, args) -#define ___bpf_fill12(arr, p, x, args...) arr[p] = x; ___bpf_fill11(arr, p + 1, args) -#define ___bpf_fill(arr, args...) \ - ___bpf_apply(___bpf_fill, ___bpf_narg(args))(arr, 0, args) - -/* - * BPF_SEQ_PRINTF to wrap bpf_seq_printf to-be-printed values - * in a structure. - */ -#define BPF_SEQ_PRINTF(seq, fmt, args...) \ -({ \ - static const char ___fmt[] = fmt; \ - unsigned long long ___param[___bpf_narg(args)]; \ - \ - _Pragma("GCC diagnostic push") \ - _Pragma("GCC diagnostic ignored \"-Wint-conversion\"") \ - ___bpf_fill(___param, args); \ - _Pragma("GCC diagnostic pop") \ - \ - bpf_seq_printf(seq, ___fmt, sizeof(___fmt), \ - ___param, sizeof(___param)); \ -}) - -/* - * BPF_SNPRINTF wraps the bpf_snprintf helper with variadic arguments instead of - * an array of u64. - */ -#define BPF_SNPRINTF(out, out_size, fmt, args...) \ -({ \ - static const char ___fmt[] = fmt; \ - unsigned long long ___param[___bpf_narg(args)]; \ - \ - _Pragma("GCC diagnostic push") \ - _Pragma("GCC diagnostic ignored \"-Wint-conversion\"") \ - ___bpf_fill(___param, args); \ - _Pragma("GCC diagnostic pop") \ - \ - bpf_snprintf(out, out_size, ___fmt, \ - ___param, sizeof(___param)); \ -}) - #endif diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_bpf_hash_map.c b/tools/testing/selftests/bpf/progs/bpf_iter_bpf_hash_map.c index 6dfce3fd68bc..0aa3cd34cbe3 100644 --- a/tools/testing/selftests/bpf/progs/bpf_iter_bpf_hash_map.c +++ b/tools/testing/selftests/bpf/progs/bpf_iter_bpf_hash_map.c @@ -2,7 +2,6 @@ /* Copyright (c) 2020 Facebook */ #include "bpf_iter.h" #include -#include char _license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_bpf_map.c b/tools/testing/selftests/bpf/progs/bpf_iter_bpf_map.c index b83b5d2e17dc..6c39e86b666f 100644 --- a/tools/testing/selftests/bpf/progs/bpf_iter_bpf_map.c +++ b/tools/testing/selftests/bpf/progs/bpf_iter_bpf_map.c @@ -2,7 +2,6 @@ /* Copyright (c) 2020 Facebook */ #include "bpf_iter.h" #include -#include char _license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_ipv6_route.c b/tools/testing/selftests/bpf/progs/bpf_iter_ipv6_route.c index d58d9f1642b5..784a610ce039 100644 --- a/tools/testing/selftests/bpf/progs/bpf_iter_ipv6_route.c +++ b/tools/testing/selftests/bpf/progs/bpf_iter_ipv6_route.c @@ -3,7 +3,6 @@ #include "bpf_iter.h" #include "bpf_tracing_net.h" #include -#include char _license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_netlink.c b/tools/testing/selftests/bpf/progs/bpf_iter_netlink.c index 95989f4c99b5..a28e51e2dcee 100644 --- a/tools/testing/selftests/bpf/progs/bpf_iter_netlink.c +++ b/tools/testing/selftests/bpf/progs/bpf_iter_netlink.c @@ -3,7 +3,6 @@ #include "bpf_iter.h" #include "bpf_tracing_net.h" #include -#include char _license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_task.c b/tools/testing/selftests/bpf/progs/bpf_iter_task.c index b7f32c160f4e..c86b93f33b32 100644 --- a/tools/testing/selftests/bpf/progs/bpf_iter_task.c +++ b/tools/testing/selftests/bpf/progs/bpf_iter_task.c @@ -2,7 +2,6 @@ /* Copyright (c) 2020 Facebook */ #include "bpf_iter.h" #include -#include char _license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_task_btf.c b/tools/testing/selftests/bpf/progs/bpf_iter_task_btf.c index a1ddc36f13ec..bca8b889cb10 100644 --- a/tools/testing/selftests/bpf/progs/bpf_iter_task_btf.c +++ b/tools/testing/selftests/bpf/progs/bpf_iter_task_btf.c @@ -2,7 +2,6 @@ /* Copyright (c) 2020, Oracle and/or its affiliates. */ #include "bpf_iter.h" #include -#include #include #include diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_task_file.c b/tools/testing/selftests/bpf/progs/bpf_iter_task_file.c index b2f7c7c5f952..6e7b400888fe 100644 --- a/tools/testing/selftests/bpf/progs/bpf_iter_task_file.c +++ b/tools/testing/selftests/bpf/progs/bpf_iter_task_file.c @@ -2,7 +2,6 @@ /* Copyright (c) 2020 Facebook */ #include "bpf_iter.h" #include -#include char _license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_task_stack.c b/tools/testing/selftests/bpf/progs/bpf_iter_task_stack.c index 43c36f5f7649..f2b8167b72a8 100644 --- a/tools/testing/selftests/bpf/progs/bpf_iter_task_stack.c +++ b/tools/testing/selftests/bpf/progs/bpf_iter_task_stack.c @@ -2,7 +2,6 @@ /* Copyright (c) 2020 Facebook */ #include "bpf_iter.h" #include -#include char _license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_task_vma.c b/tools/testing/selftests/bpf/progs/bpf_iter_task_vma.c index 11d1aa37cf11..4ea6a37d1345 100644 --- a/tools/testing/selftests/bpf/progs/bpf_iter_task_vma.c +++ b/tools/testing/selftests/bpf/progs/bpf_iter_task_vma.c @@ -2,7 +2,6 @@ /* Copyright (c) 2020 Facebook */ #include "bpf_iter.h" #include -#include char _license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_tcp4.c b/tools/testing/selftests/bpf/progs/bpf_iter_tcp4.c index 54380c5e1069..2e4775c35414 100644 --- a/tools/testing/selftests/bpf/progs/bpf_iter_tcp4.c +++ b/tools/testing/selftests/bpf/progs/bpf_iter_tcp4.c @@ -3,7 +3,6 @@ #include "bpf_iter.h" #include "bpf_tracing_net.h" #include -#include #include char _license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_tcp6.c b/tools/testing/selftests/bpf/progs/bpf_iter_tcp6.c index b4fbddfa4e10..943f7bba180e 100644 --- a/tools/testing/selftests/bpf/progs/bpf_iter_tcp6.c +++ b/tools/testing/selftests/bpf/progs/bpf_iter_tcp6.c @@ -3,7 +3,6 @@ #include "bpf_iter.h" #include "bpf_tracing_net.h" #include -#include #include char _license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_udp4.c b/tools/testing/selftests/bpf/progs/bpf_iter_udp4.c index f258583afbbd..cf0c485b1ed7 100644 --- a/tools/testing/selftests/bpf/progs/bpf_iter_udp4.c +++ b/tools/testing/selftests/bpf/progs/bpf_iter_udp4.c @@ -3,7 +3,6 @@ #include "bpf_iter.h" #include "bpf_tracing_net.h" #include -#include #include char _license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_udp6.c b/tools/testing/selftests/bpf/progs/bpf_iter_udp6.c index 65f93bb03f0f..5031e21c433f 100644 --- a/tools/testing/selftests/bpf/progs/bpf_iter_udp6.c +++ b/tools/testing/selftests/bpf/progs/bpf_iter_udp6.c @@ -3,7 +3,6 @@ #include "bpf_iter.h" #include "bpf_tracing_net.h" #include -#include #include char _license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/progs/test_snprintf.c b/tools/testing/selftests/bpf/progs/test_snprintf.c index e35129bea0a0..e2ad26150f9b 100644 --- a/tools/testing/selftests/bpf/progs/test_snprintf.c +++ b/tools/testing/selftests/bpf/progs/test_snprintf.c @@ -3,7 +3,6 @@ #include #include -#include __u32 pid = 0; -- 2.31.1.818.g46aad6cb9e-goog