From mboxrd@z Thu Jan 1 00:00:00 1970 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 17FD724C09A; Thu, 17 Apr 2025 13:11:25 +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=1744895486; cv=none; b=tBJcfv2t6QCZ+eEEtAMuMEWrzTVKSlw20d0U/XeVw0V1lU0PkN6FylMx1TRITa8Js7a6vWJw0lFWHkthN6qJYxM848HuP2VPKvpx12Dt8JIntjkawAs/Y9F14oBkg1M8L86ANtQdVXlk5NdmijaKf6guZtdfNN7cSa06/0iWypM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744895486; c=relaxed/simple; bh=yAtQC+T/kvIyaWVd4i2QUou/vgOvw6JReC/jdUjP8LA=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=k+iPeMedT64BHXBDEIFB0+hpO9DysEmAWYDVHdydG9yfovDTh6vOaXtk/X+id94/BSwZiLVCOZBGOmRgRM4bWYYqrYU4TNyndgZKy0aCR6h7K9+njJ9MVWjeASiVh1ImoytBVDLlxgJwH8Ojs2XcMKiEU0z/FxxShgI+F+F2ocM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=MQ8D1RDH; 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="MQ8D1RDH" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 93F17C4CEEA; Thu, 17 Apr 2025 13:11:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1744895485; bh=yAtQC+T/kvIyaWVd4i2QUou/vgOvw6JReC/jdUjP8LA=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=MQ8D1RDHtmAN2jG4WAqAmBlSGJzLhLlxw8G+K3vA6rWZuHBpsRQ8VTL+Cnm7uAogI izPL41Tp11xH11Wh+pERILy7ClalB27x2/51gcJfRny3QMD3YP/E2srYswYkWLFVii +n2a3PKH4X019uMgu1aqiPSGgS/X7Er7ujHEr4/+AW9xXuYTWgp9+L9dZqmneLOfkb ECW2POriEXxnWUFZ5YaOH2vLfKZnAYQvSyDdhFdrmvsDf3uAWEMqCHd/hDk2/LvtzN rca6RSW7KkeMdsabuxL0Jo57Ag66Kk1FEzllWne+xtKxh3whrUGYo0N1Ymi31nulsV mB+u/1CH3ieiA== From: Jeff Layton Date: Thu, 17 Apr 2025 09:11:07 -0400 Subject: [PATCH v3 4/8] ref_tracker: allow pr_ostream() to print directly to a seq_file Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250417-reftrack-dbgfs-v3-4-c3159428c8fb@kernel.org> References: <20250417-reftrack-dbgfs-v3-0-c3159428c8fb@kernel.org> In-Reply-To: <20250417-reftrack-dbgfs-v3-0-c3159428c8fb@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=1899; i=jlayton@kernel.org; h=from:subject:message-id; bh=yAtQC+T/kvIyaWVd4i2QUou/vgOvw6JReC/jdUjP8LA=; b=owEBbQKS/ZANAwAIAQAOaEEZVoIVAcsmYgBoAP321YN2F1YjeV3Kjoqgiv/5q5RrzHMy/MKrh K3HY1aQK8uJAjMEAAEIAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCaAD99gAKCRAADmhBGVaC FWtjEADBHGturis7doC2MJvP1kXI2piqnl55Mcwg9P56MIcn/7Q7kWWXJ+mGit7NsJIusTsgdHQ tKuA8xpPwDiSMNJVqzuyqbVwhzF2dPlGfh1Fv+krUrrBjKsa/l9GRmN0/QuAjLUHOdckbe9Eu/z XS2FUf7akH5cWCZx89e3bI6CsZ9pHeD7htAZL985wVRra2i0LlSzD57Ui8F5twJNIRFjWj69e6D TlVjHoxbQDN61OFKU483be0+B/9Cku338oPcts4AnQQXyLhMZXIv+HSiKLD5e0mLXEuBTEfNMOL NDbA7kbRTdm3TVedaFx8Ll5YRp55mGEsIbzOxMkvbp/k4Gzn3hS/rOCJYM+i5IitUhLYCPszSxt tS6Ys5xuX8DGOiPPDD7VQiahcVXIiaVE1ZA2U7NuaJHXFID75OnTsMZLU40CIp4fWxyuBcmZieJ kBC6y8C0WKZh1iT7ZeBhxHOfdOif/YUKGlN+Dt0IBD6lSINQydxoQuDftwawE/LD4k/Ug9NA/ep TFREerQ22/ykur8oJxJ29rvB1WFWNjNavHHdlmQz0TyBqyVoVT8O+qTs1PDiU6AUmLtY80h6yR6 54YJ4vrbHD7yCqr6BTiElVNYPpOP/4XaX+syqsCDiTtRU1S7Z15UtOQC0WFjrUpwrGyH47Sx5ay vQyTSXggLgqwXXA== 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. 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); -- 2.49.0