From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f72.google.com (mail-wm1-f72.google.com [209.85.128.72]) (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 5DDCA46C82D for ; Tue, 4 Aug 2026 14:04:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785852243; cv=none; b=g3PS+iqQ5c+qGBDuy4dj7O53vtgh8BDlT3tUdKofxkbX5XkmGIX/n1kqmsJnxn5NRxVFR4obG6d5O2+MCwTF4vdpB7mhY5Ro7RGvxjL6DKhEomAtZGOZWrcT194t73SbfAgQpJMIGjvsHGtScRBSK53vrHLtAG0loaY4hQqdhAo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785852243; c=relaxed/simple; bh=IsHmUPcqi9NIP82lQ7ezs1gMk5K5q+JXKl7YBMvC2I4=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=H4h3zSCQ9MfpzggiaeplexjFTA6xx2PvGQPpeyeKPFJCnIhkVugllVCSAocK0LtHE6kXBpWfgWsrR1VmqSi9ywa90OnH9RNmQCixH5uyzRdOu5xc4syQKe/T5Ch35kUAex+yMWbLD8XfFuFbAXwvRnRDvFjKRqizAJHfdWW3xv8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--vdonnefort.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=de1hIETp; arc=none smtp.client-ip=209.85.128.72 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--vdonnefort.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="de1hIETp" Received: by mail-wm1-f72.google.com with SMTP id 5b1f17b1804b1-4955b84e25eso24755955e9.1 for ; Tue, 04 Aug 2026 07:04:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1785852240; x=1786457040; darn=vger.kernel.org; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:from:to:cc:subject:date:message-id:reply-to :content-type; bh=8Dl6nk6KZuL3gAoZ29Y5S3I6bxjuO0XPO7F46zwNpZc=; b=de1hIETpTh6HuelitKecoan9rv3yNCYeDBOKHzx6Aw8YNE/H4j3zP+OMMFu/tZ+Aze KCCJwhzulmU0CWc+jTW/9p7UCULbqhEUZFyo2pThJNudhhjLLa0VZFBPAlTNen5D7r+i eoaZRgMUoDGFYVE52zo5PZN23tFTkhomhe+iRYp17rJdp38xp5bb6v3NBTQ8N7l8MeJg d8hR7EfG62MR/GwLsfvkw9WEPMDDhnopXmrFjwTPWLRQnptYGqRUWu5HOxqWi4JSoiaE HBLuKLYeaQi7+fVLeaHrzFDIty9lSYaPDTlSddxdG+oJ+uXF/7+S/tHryJLdnOpf6M37 B2MQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1785852240; x=1786457040; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=8Dl6nk6KZuL3gAoZ29Y5S3I6bxjuO0XPO7F46zwNpZc=; b=WIQFNw8yGvTRLr7U1YuK6nHgEsYxnTaeYiN2s4nFPyi8KyvhmsrPdn3jylpCwNQHFY JMiU52hCYV/X44babkTU7oaBCZIka71Sg/KzH/+EeD4oIuvLZc3ULEhx/Ood1uCmpxMp bYyKCAK08WNBVwJGRMRA/ijBl0FfwycNvGdLGcxxNi6CEQTKE/fVj7WuHeRaOBMnB3iF qKQjbdXll1K+5gHxFLjtUZ4xf3FWkp38/SHjaOafFOVMbry6DwFYuZ0ej/ShPeDga/wH A4NN5a+BM/wq8dKbhIL20qetcejp5PvFZIsfa/YaWG7qPE0rLG9Gl5QLl8LsXG0nzaeM EOEw== X-Forwarded-Encrypted: i=1; AHgh+Rp+Y5AeCMwedor7tBZ711lIKgVYGE6c5XlXWMBNKVb4NThTAGp4qPtHk9+0jaS03iAU2RF7CmwqWOj+ups=@vger.kernel.org X-Gm-Message-State: AOJu0YyJ/gz5bl8cTwSzi8XABgMtKhDrPaQyEOziiJWbE++O5QKCgppy gFuJVzik/BfmODymIHnJ8NddTuKTcZ5oNg/I4phLwCJcCJI88WiMP6/sM5GqFh+5bKQDX7/bkTE LVPT+N3lui21TxxRCnU8JUA== X-Received: from wmqg13.prod.google.com ([2002:a05:600c:4ecd:b0:495:5422:15f2]) (user=vdonnefort job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:470a:b0:499:4892:e84e with SMTP id 5b1f17b1804b1-4994892e891mr144535735e9.11.1785852239416; Tue, 04 Aug 2026 07:03:59 -0700 (PDT) Date: Tue, 4 Aug 2026 15:03:22 +0100 In-Reply-To: <20260804140333.797210-1-vdonnefort@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260804140333.797210-1-vdonnefort@google.com> X-Mailer: git-send-email 2.55.0.571.g244d577d93-goog Message-ID: <20260804140333.797210-8-vdonnefort@google.com> Subject: [PATCH v4 07/18] tracing/remotes: selftests: Add a test for the dmesg tracefs file From: Vincent Donnefort To: rostedt@goodmis.org, mhiramat@kernel.org, linux-trace-kernel@vger.kernel.org Cc: mathieu.desnoyers@efficios.com, kernel-team@android.com, linux-kernel@vger.kernel.org, Vincent Donnefort Content-Type: text/plain; charset="UTF-8" Exercise the newly introduced dmesg tracefs file that turns on and off the dmesg redirection. Signed-off-by: Vincent Donnefort diff --git a/tools/testing/selftests/ftrace/test.d/remotes/dmesg.tc b/tools/testing/selftests/ftrace/test.d/remotes/dmesg.tc new file mode 100644 index 000000000000..aebeea9dbab6 --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/remotes/dmesg.tc @@ -0,0 +1,72 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: Test trace remote dmesg redirection +# requires: remotes/test + +. $TEST_DIR/remotes/functions + +test_dmesg() +{ + echo 0 > tracing_on + assert_unloaded + + # + # Test dmesg on/off when tracing is disabled + # + echo 1 > dmesg + test $(cat dmesg) -eq 1 + assert_loaded + + echo 0 > dmesg + test $(cat dmesg) -eq 0 + assert_unloaded + + # + # Test events are logged to dmesg + # + dmesg -c > /dev/null + + echo 1 > tracing_on + assert_loaded + echo 1 > dmesg + test $(cat dmesg) -eq 1 + + nr_events=128 + for i in $(seq 1 $nr_events); do + echo $i > write_event + done + + sleep 1 + output=$(mktemp $TMPDIR/remote_test.XXXXXX) + dmesg | grep "selftest id=" | sed 's/^[^]]*] //'> $output + + check_trace 1 $nr_events $output + + rm $output + + # + # Disable dmesg and Test events were not consumed by dmesg + # + echo 0 > dmesg + test $(cat dmesg) -eq 0 + + start_id=$(($nr_events + 1)) + end_id=$(($start_id + $nr_events)) + + for i in $(seq $start_id $end_id); do + echo $i > write_event + done + + sleep 1 + + output=$(dump_trace_pipe) + check_trace $start_id $end_id $output + rm $output +} + +if [ -z "$SOURCE_REMOTE_TEST" ]; then + set -e + + setup_remote_test + test_dmesg +fi diff --git a/tools/testing/selftests/ftrace/test.d/remotes/functions b/tools/testing/selftests/ftrace/test.d/remotes/functions index 05224fac3653..4a14aa72fdf0 100644 --- a/tools/testing/selftests/ftrace/test.d/remotes/functions +++ b/tools/testing/selftests/ftrace/test.d/remotes/functions @@ -8,6 +8,7 @@ setup_remote() cd remotes/$name/ echo 0 > tracing_on + echo 0 > dmesg clear_trace echo 7 > buffer_size_kb echo 0 > events/enable diff --git a/tools/testing/selftests/ftrace/test.d/remotes/hypervisor/dmesg.tc b/tools/testing/selftests/ftrace/test.d/remotes/hypervisor/dmesg.tc new file mode 100644 index 000000000000..bf4a3c145e7a --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/remotes/hypervisor/dmesg.tc @@ -0,0 +1,11 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: Test the hypervisor trace dmesg redirection +# requires: remotes/hypervisor/write_event + +SOURCE_REMOTE_TEST=1 +. $TEST_DIR/remotes/dmesg.tc + +set -e +setup_remote "hypervisor" +test_dmesg -- 2.55.0.571.g244d577d93-goog