From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qk1-f175.google.com (mail-qk1-f175.google.com [209.85.222.175]) (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 B518F364EB2 for ; Tue, 3 Feb 2026 18:04:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.222.175 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770141889; cv=none; b=ktswX3ssqjLPTh+kVgY2G8XnSLVI5SnpA4T38+71T6XdQXlkEavNW4raNvQAgCdI4gEqCc1MjC0daXXTgR/P5yqpAAv5lR47j9TIPljIIcxVHdPjuk0b54Epq1+Qv0Iv4xNtIjY1Z4X4byqJIgBFPlOvT0aXxaQbKdnZP2u7ndc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770141889; c=relaxed/simple; bh=BAy2wS2w78jisfRWNwcbbtn8R+3j8ekGotqSONtZAxQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=IKDGeFYZWdRxflIHG/ScIUUWZZ2dgE/+pp4hNR2IidDztL0LDJ26mXn+ayRuZO7mIDnbWs1XIh62AzKKczbgid06n3oynxKPcn1Iwl2srg7WM6fArI1G9dPvxAVtB/KLefFzUGHFsXL7qAcBqEdasTKdskSmTwN0dj7CjWhVdc8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=etsalapatis.com; spf=pass smtp.mailfrom=etsalapatis.com; dkim=pass (2048-bit key) header.d=etsalapatis-com.20230601.gappssmtp.com header.i=@etsalapatis-com.20230601.gappssmtp.com header.b=zCGE+pWM; arc=none smtp.client-ip=209.85.222.175 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=etsalapatis.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=etsalapatis.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=etsalapatis-com.20230601.gappssmtp.com header.i=@etsalapatis-com.20230601.gappssmtp.com header.b="zCGE+pWM" Received: by mail-qk1-f175.google.com with SMTP id af79cd13be357-8c6a0702b86so607677485a.0 for ; Tue, 03 Feb 2026 10:04:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=etsalapatis-com.20230601.gappssmtp.com; s=20230601; t=1770141886; x=1770746686; 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=tvF4zPiM/74nGlGB7v4G21yGEcsL8UoXtHrhTAhYimg=; b=zCGE+pWMq2f0t2FLuInUUxgaMsdQ/AS1CGhF3nPLlUyFngRX2cmlU6PPp/QB07MdZn VYx9OqICdSFUOACuez1qxWBbEK0fuTfI1r2OsZkJMxs3MM3QPT+qDQ6j3W4qJy1NXorz Pnfae7UtM1pX4FNAnhdCfCrYCUtxoN/AKgwwp23gN7cWQjTeakuepVy8EwX0mbd0+BC+ X0Bab2ITUCZk/WLNjfpn/SefmgDTsYkZw9CECcLUL0bjofaNJ9H57IVHRT96J9UU8rV9 tXwTRBiA03ffTdDSigSiVBh4vkSO6u6ZbRjT87X8z7D7PvoUEYVWnMkWpV07/XUOrdje NIqQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1770141886; x=1770746686; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=tvF4zPiM/74nGlGB7v4G21yGEcsL8UoXtHrhTAhYimg=; b=N1iSEWwVY/1o0UGEFbg60dJ6wLXPehIVKTaP/ypnly/zBw2QTjpiI3Sj03L90WU7up p97b5f4PKJX4wFVWfZPWFPUM2tcHDfTbuJ0qJSMfHIOaP0tvEqJpjMZcoQLfd73OCzXB SS1hf1OK5cLm8zOEHno6bTSLAwijWGIZy08tEz9cAXMMBC/5W4eu1KJEISSnd2VeOyaD XaONSinGO/IeWXzgmzVDUeW7w1dfiLkH+nhhwGjQea6GXQ1lwhh5TmMyRQPO7fCOsP+8 v5i6AheRVe+gF2n/SqWXEn0eDKauZPdPS/WkrJoEAVoicbze1hzPO02+ndqS7zhxfvvm SwRg== X-Gm-Message-State: AOJu0YyrnFkroL4euI1pNKr8XzAwIGf56w2uhtEsW1n4T47RdiNrDwcK hcod7Xht0ntHlHnJ6l2R8hO0HjoSc6LLVi/h+ymdz/i28AudumrWy76Mbf6AQxhmKcm9Zy2w1iz l2xll X-Gm-Gg: AZuq6aLPP6763m4tvpwE7lea3aFJIKZX9MJFVKx2J530yzzUY3o3Pg6D2zgE2OWyW2b oGNVm2sP5cRHw97K+uteTk7zgDtqqn3+Lofc3tfR5ethANkvOkJYYycIpUh7x8Xh62qcgJUjw7I sxaymUyOnGRhqOyno/r2SXliVoLI2z6prLXmt+W09XZpiIO2lTa69fhxLlbPH2cZyk63+VPzNwv 2q47bAzYujFrcEqlmUZoIaOacxgU5m7SOk7TCHDGeioya+c6ayDXUDOTMdZnaO45qSj349O0hec 4e4+VzKMhcy/eDn/wMyScmnXRPNhXmTVQZVeEyiV5UaRKm3z75dVeiJJy3QDt8PxBaj4QYO6mf7 LtlUI4Df+hyuAEDggOk8kOP83Mb/UmSYJeDvG2g6f746vlGZ2mBQlpNgCy69Q4WhCwhQGC6M0s3 o+t4nyfK3/9ddT7z44p2ON X-Received: by 2002:a05:620a:3912:b0:8c6:a373:c4a1 with SMTP id af79cd13be357-8ca2f84a04emr55343785a.24.1770141886318; Tue, 03 Feb 2026 10:04:46 -0800 (PST) Received: from boreas.. ([140.174.219.137]) by smtp.gmail.com with ESMTPSA id af79cd13be357-8ca2fa8144csm20469185a.14.2026.02.03.10.04.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Feb 2026 10:04:45 -0800 (PST) From: Emil Tsalapatis To: bpf@vger.kernel.org Cc: andrii@kernel.org, ast@kernel.org, daniel@iogearbox.net, eddyz87@gmail.com, martin.lau@kernel.org, memxor@gmail.com, song@kernel.org, yonghong.song@linux.dev, Emil Tsalapatis Subject: [PATCH v2 4/4] selftests/bpf: Add selftests for stream functions under lock Date: Tue, 3 Feb 2026 13:04:24 -0500 Message-ID: <20260203180424.14057-5-emil@etsalapatis.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20260203180424.14057-1-emil@etsalapatis.com> References: <20260203180424.14057-1-emil@etsalapatis.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add a selftest to ensure BPF stream functions can now be called while holding a lock. Signed-off-by: Emil Tsalapatis Acked-by: Kumar Kartikeya Dwivedi --- tools/testing/selftests/bpf/progs/stream.c | 32 ++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/tools/testing/selftests/bpf/progs/stream.c b/tools/testing/selftests/bpf/progs/stream.c index f63b378de090..6f999ba951a3 100644 --- a/tools/testing/selftests/bpf/progs/stream.c +++ b/tools/testing/selftests/bpf/progs/stream.c @@ -42,6 +42,10 @@ int size; u64 fault_addr; void *arena_ptr; +#define private(name) SEC(".bss." #name) __hidden __attribute__((aligned(8))) + +private(STREAM) struct bpf_spin_lock block; + SEC("syscall") __success __retval(0) int stream_exhaust(void *ctx) @@ -255,4 +259,32 @@ int stream_print_stack_invalid_id(void *ctx) return bpf_stream_print_stack((enum bpf_stream_id)0xbadcafe); } +SEC("syscall") +__arch_x86_64 +__arch_arm64 +__success __retval(0) +__stdout(_STR) +__stderr("CPU: {{[0-9]+}} UID: 0 PID: {{[0-9]+}} Comm: {{.*}}") +__stderr("Call trace:\n" +"{{([a-zA-Z_][a-zA-Z0-9_]*\\+0x[0-9a-fA-F]+/0x[0-9a-fA-F]+\n" +"|[ \t]+[^\n]+\n)*}}") +int stream_print_kfuncs_locked(void *ctx) +{ + int ret; + + bpf_spin_lock(&block); + + ret = bpf_stream_printk(BPF_STDOUT, _STR); + if (ret) + goto out; + + ret = bpf_stream_print_stack(BPF_STDERR); + +out: + bpf_spin_unlock(&block); + + return ret; +} + + char _license[] SEC("license") = "GPL"; -- 2.49.0