From patchwork Fri Apr 18 14:24:28 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 14057244 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 81BE31C5F37; Fri, 18 Apr 2025 14:24:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744986281; cv=none; b=K4qzXHNgmNXuvx2Tr58LQDsazbybtKGxoTQWQPaW+Fd4jy3XknfYw+WJhbsK67ISqQQ8lu1RNaeAVnc0eMraSU3eQxLOJcXmU/R5/j07b8JU7uUTILMjTW+RaihuhpJw50R+R6sBmCCbPPgW8Eevp6EqnrCsAp4toddoe7M+FmI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744986281; c=relaxed/simple; bh=fZKlpIcOJEF616o9qzMIcvZOI/oG1RfsOsr5fOV2mTY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Ay/ZkjNPrVbBwi5tSrKk2/0Qp5QOqnnyh8YG84uez1ND2sOAWZoepcHUR8aeAJbjJ6YDiNqPleGI94uN2nRJbNhmzqMkbrRIQkT3FYwECK+fhuvv0QcYrSYMVKFEA4/TqifFJatL9LCVoYWA7tj0SjD4KSbhiV4VdtRtgW2Puyk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Sy4y7PTE; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Sy4y7PTE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5651FC4CEE2; Fri, 18 Apr 2025 14:24:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1744986281; bh=fZKlpIcOJEF616o9qzMIcvZOI/oG1RfsOsr5fOV2mTY=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=Sy4y7PTEdAWaHOLkwEEL+uDCGvA6ZEDjO+WyRUgAP7P176slTRHm1L/2ZJMK+DaoU dpPGC5idMXlMS+xzwtLX9iZHQ6ZYKqq39BBZlOk3kFlcBZlD0jv7tyCR4hfUDnIDWQ cxDFfiVOhZoyUMlJCfj4wIoDX7ebvcek8DIj9lmg5TiE75b9iBJMv8B06q11dCnzC0 MG/QyK7ll31ZkSWtzmJLrgLVZA63fYL0bdRZohWW0E2Nxu7K6t3uslv7oRC2zms8u4 MI+DfZlXMQmJkTR29J14L+TWH91Md+GYHtLPm+l/TUoKjVho4u1PYcKltgXit0/K6e /zt9tRdC1W5og== From: Jeff Layton Date: Fri, 18 Apr 2025 10:24:28 -0400 Subject: [PATCH v4 4/7] ref_tracker: allow pr_ostream() to print directly to a seq_file Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250418-reftrack-dbgfs-v4-4-5ca5c7899544@kernel.org> References: <20250418-reftrack-dbgfs-v4-0-5ca5c7899544@kernel.org> In-Reply-To: <20250418-reftrack-dbgfs-v4-0-5ca5c7899544@kernel.org> To: Andrew Morton , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman Cc: Kuniyuki Iwashima , Qasim Ijaz , Nathan Chancellor , Andrew Lunn , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Jeff Layton X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1942; i=jlayton@kernel.org; h=from:subject:message-id; bh=fZKlpIcOJEF616o9qzMIcvZOI/oG1RfsOsr5fOV2mTY=; b=owEBbQKS/ZANAwAIAQAOaEEZVoIVAcsmYgBoAmCinpbaziQltBaRohrpGTmSAVuUse0XYHvoA PTj1MwrV4aJAjMEAAEIAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCaAJgogAKCRAADmhBGVaC FSzlEACnnocC2WTgHkIMfOzvJieuIk8aTMSGhsQw+yQI0hAQWK7kr11tlVg56oRdHShiz5Hj2So +8FSHRSg9chXDGx0IQ/kFss0f9zSBvs8I8/dkm4xj1e09U0GjLD6yFvPKb4dN83+imFJtkVSWwk lVXJ1XYhrnwxaakfHmfrP0E0b2TM9B32apfFXeVTWbOu+tvW414d3f7EfjukF6BjdzE5xpY6wRg eoszf9vVIpqGzhCXuwUPW58W190AbhJHO+fqEputaWrbl9fiO5cRTLwwifOHxRqQR3TNI+XGVOr eQSM0o05UyPjeg5GBHHFuwEpxwQZYtw5LEqYCJLBorr2PdYg1h1+FE0bwlL1Mt45sJkWZIMEAcg 3m4dyrK/SZJnwanXx2G8LpBQ76CFpQyPnAI3A4II3hN1JyGLHKRLEdiTu4zC6HUz94+n+oklBRj in6Zt8etwWg76JPdy4UjrCdK9/+DLd/b1uiGDbsGGwF+7f0o7tNnLuj6fIzh24JLgV2Cy+6szow 8usiGhJaiQM922oh5i5bwpu3oU8uSFY7aeNHOOk1b9gbGiKsx3ytqW56jC3sbJxQwMWABnnLlyB KXQfplR4op5om4m6c2rX8c5sZJdrfqSoqNULv/wTCUlCLTUEn4Nj+jkkf3yvKTAQdkW37zoGo7l JRPrO2lXTfFrD8A== X-Developer-Key: i=jlayton@kernel.org; a=openpgp; fpr=4BC0D7B24471B2A184EAF5D3000E684119568215 Allow pr_ostream to also output directly to a seq_file without an intermediate buffer. Reviewed-by: Andrew Lunn Signed-off-by: Jeff Layton --- lib/ref_tracker.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/lib/ref_tracker.c b/lib/ref_tracker.c index b6e0a87dd75eddef4d504419c0cf398ea65c19d8..4857bcb6d4bf557a0089f51328e75e8209e959e6 100644 --- a/lib/ref_tracker.c +++ b/lib/ref_tracker.c @@ -8,6 +8,7 @@ #include #include #include +#include #define REF_TRACKER_STACK_ENTRIES 16 #define STACK_BUF_SIZE 1024 @@ -70,6 +71,7 @@ struct ostream { void __ostream_printf (*func)(struct ostream *stream, char *fmt, ...); char *prefix; char *buf; + struct seq_file *seq; int size, used; }; @@ -93,6 +95,15 @@ static void __ostream_printf pr_ostream_buf(struct ostream *stream, char *fmt, . stream->used += min(ret, len); } +static void __ostream_printf pr_ostream_seq(struct ostream *stream, char *fmt, ...) +{ + va_list args; + + va_start(args, fmt); + seq_vprintf(stream->seq, fmt, args); + va_end(args); +} + #define pr_ostream(stream, fmt, args...) \ ({ \ struct ostream *_s = (stream); \ @@ -302,6 +313,20 @@ EXPORT_SYMBOL_GPL(ref_tracker_free); #ifdef CONFIG_DEBUG_FS #include +static int ref_tracker_dir_seq_print(struct ref_tracker_dir *dir, struct seq_file *seq) +{ + struct ostream os = { .func = pr_ostream_seq, + .prefix = "", + .seq = seq }; + unsigned long flags; + + spin_lock_irqsave(&dir->lock, flags); + __ref_tracker_dir_pr_ostream(dir, 16, &os); + spin_unlock_irqrestore(&dir->lock, flags); + + return os.used; +} + static int __init ref_tracker_debugfs_init(void) { ref_tracker_debug_dir = debugfs_create_dir("ref_tracker", NULL);