From patchwork Mon Jun 3 23:24:49 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Ogness X-Patchwork-Id: 13684469 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7E74513D62C; Mon, 3 Jun 2024 23:25:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717457103; cv=none; b=LG0fAq/r+s9zvHZWDiHYccjE+zuDbNyDMYifxcoY6qgqiIG4FRUGKTYcH2DWunmC7eZpFWzTekpMU2XYOrrKKBEfp0QKrPAh1ZMWncgvt6MYLs3zPiYX8CQz7aU8Hh7Gz2Pi0O8hbgP7oi16AkBhWlzXwXdGiwgQuvhfuMgLRok= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717457103; c=relaxed/simple; bh=y/8/D5lsvEkXT9odzpG9/skVj8B2WhjdY/3Pwb613Oc=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=dtPXxs2gO/e48Bt2VwFaUllGqwW/nhqV0WNkxGNqOWQc1rLXz/G15TC6q/3LrGaFMp+ji6pT5/mEWATLls9aWIQ2Oc2uch9K75yZ172+3FUB+huCAPp/jDJIXgteU/wGt8YySR+t6xnBGa7aq0oFcbLEA7lwXSxQIgJtNXaxeH8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=Knm8ZSQX; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=O1KZyvD1; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="Knm8ZSQX"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="O1KZyvD1" From: John Ogness DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1717457099; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=IscutLuG042H8NAY0r6UeOoPwuGyiJXascNGHAe7SFU=; b=Knm8ZSQXG50rKc0ym0n8q5eWNbowd5+U6leS1YNRc3IcWa9at7lDz4Ebe34xrKgAkdpuhO psPTIMCbufR+xCayk5DgtYqDGIPGV/jJ/uBJH1eL5qL87Uu+ExU9Eae0cvSlK1PI1/xLId MKloKy2XIs+hrq9O7BYj+AmeeoUt0Ugps1L0yvtW/V7qAksEsoVt19a/TFNmao+4awW6jI Yz4I3V+CQv+WVD8HyAwq6sxX74iT/mgAHsidlhZAcs9ngo0k5HO0gomDOBLLsEUK8ke6EV +6aSusu4JiFjR166/LKiQSltT7UynuvsfIRA/LeOBsast3o1KuAaA9KnNFTQ1Q== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1717457099; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=IscutLuG042H8NAY0r6UeOoPwuGyiJXascNGHAe7SFU=; b=O1KZyvD1W3n12Nu49nRKux3bZH/acg+7k9G3b8E8sGV3aVZ4J/lXjB3lfJxyvKSORASpO+ m6L+kP00tRrCGHAQ== To: Petr Mladek Cc: Sergey Senozhatsky , Steven Rostedt , Thomas Gleixner , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH printk v2 14/18] proc: Add nbcon support for /proc/consoles Date: Tue, 4 Jun 2024 01:30:49 +0206 Message-Id: <20240603232453.33992-15-john.ogness@linutronix.de> In-Reply-To: <20240603232453.33992-1-john.ogness@linutronix.de> References: <20240603232453.33992-1-john.ogness@linutronix.de> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Update /proc/consoles output to show 'W' if an nbcon write callback is implemented (write_atomic or write_thread). Also update /proc/consoles output to show 'N' if it is an nbcon console. Signed-off-by: John Ogness Reviewed-by: Petr Mladek --- fs/proc/consoles.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/fs/proc/consoles.c b/fs/proc/consoles.c index 7036fdfa0bec..c3c01ec2273c 100644 --- a/fs/proc/consoles.c +++ b/fs/proc/consoles.c @@ -21,12 +21,14 @@ static int show_console_dev(struct seq_file *m, void *v) { CON_ENABLED, 'E' }, { CON_CONSDEV, 'C' }, { CON_BOOT, 'B' }, + { CON_NBCON, 'N' }, { CON_PRINTBUFFER, 'p' }, { CON_BRL, 'b' }, { CON_ANYTIME, 'a' }, }; char flags[ARRAY_SIZE(con_flags) + 1]; struct console *con = v; + char con_write = '-'; unsigned int a; dev_t dev = 0; @@ -57,9 +59,15 @@ static int show_console_dev(struct seq_file *m, void *v) seq_setwidth(m, 21 - 1); seq_printf(m, "%s%d", con->name, con->index); seq_pad(m, ' '); - seq_printf(m, "%c%c%c (%s)", con->read ? 'R' : '-', - con->write ? 'W' : '-', con->unblank ? 'U' : '-', - flags); + if (con->flags & CON_NBCON) { + if (con->write_atomic || con->write_thread) + con_write = 'W'; + } else { + if (con->write) + con_write = 'W'; + } + seq_printf(m, "%c%c%c (%s)", con->read ? 'R' : '-', con_write, + con->unblank ? 'U' : '-', flags); if (dev) seq_printf(m, " %4d:%d", MAJOR(dev), MINOR(dev));