From nobody Fri Dec 19 20:32:36 2025 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 9B763238144; Tue, 15 Apr 2025 18:50:25 +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=1744743025; cv=none; b=JtJ/bh8C4mXIa/zMgOHjH9nwSt8rYEuk4lf8q97+xaSnglrAJ21HPqZctr5MVDN7m98drjjKJmxadajPKBZJQ+M8yNzmW1/xwojQw4Yg9K4yDc1p7TBWjLtsEXl8sM7U9i1/I1leKtIF3RTGTXJpjQTtkUiLxz1IHHBu8rpuKnQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744743025; 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=Tp+n1P3VG+LZUtMx94thdOUlUKl9UB0/ECbW0DFsTWABO0LMtnOY5R1C1Riug9IPaBfdIhQz73yA1oOxd9wVnC0twiMen8sQF11r5WC0L7XYCW3yY9kwglz6MSIsU6clko4xvPCNT4NTtJab4oNs+bB0wUemUdjdGps++fibMdI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=W5+7RFoU; 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="W5+7RFoU" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F2E82C4AF0B; Tue, 15 Apr 2025 18:50:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1744743025; bh=yAtQC+T/kvIyaWVd4i2QUou/vgOvw6JReC/jdUjP8LA=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=W5+7RFoUS6hl2bpH5/ztZFjxl/6Ds8uW520Nyhzd2d30ZwdIbPSG6ZA1B2Wbbh37B MYkYVJ7Buxs+y5JgsptS4TNHRi/T9jyn8ASadMGu9Jk7vtzRdQcccmy2IWnK88R2AU JRIXoFF/N4JwRe5KC6+0VRCCKzeJgkvRBNpejkRN9ET8wsKchrJBPygeqx9fqAdhiX VKKT9E3YuZ8ctJfQhXQKZkFu4OHfdJs8+DDvMPduTY6auikcKHURIuQxbBlB/TP16P OOpZbXK8fyNEbEXjEcgxWW7yL/eP4Dd8TPLGeTvFH0gdV5tMc3P79zgdjXtaN5/GjD 73y9IOSiNhhlg== From: Jeff Layton Date: Tue, 15 Apr 2025 14:49:42 -0400 Subject: [PATCH v2 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: quoted-printable Message-Id: <20250415-reftrack-dbgfs-v2-4-b18c4abd122f@kernel.org> References: <20250415-reftrack-dbgfs-v2-0-b18c4abd122f@kernel.org> In-Reply-To: <20250415-reftrack-dbgfs-v2-0-b18c4abd122f@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/ZANAwAIAQAOaEEZVoIVAcsmYgBn/qppqbzqQnotbk6ZG/YJ56GMWjDeobk0RsJ1f oMs2PYiBQSJAjMEAAEIAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCZ/6qaQAKCRAADmhBGVaC FQz4D/0WlD5+uOnNzq0BfiPoe5tT/A5Z2ojN9aiU/LWeK51HtklSUetMWZ/66NCqj7mm8wMWLtT NlRRwP5ululHGf7akgbhChbAon4vKUYF3d4wL92b04XkM/wqFMa1bXSEG51FNGkGkoM5lgzDv6j kExKhBCMG3SN/cp4XZButqPtnY2pOtheSCIBe40GVTpu3/5i3IS95S8FcSp1n3yAcJKceVyXvVe Olk2/cqnsd5tpypxLKWzhFf9SZNno3fXP8QcqKceEX6r/lcFl4YQLWDo5vYEPWuAh6T6RvDL2Dl Gze4U0Cqi8lw/O26obcn3UrUR/UO3TeQBChhpCBBMZErZSraEIjI7svWM+xl7MW/no/COjBvDDW AyvmFJFefXWghcXQEtYvP7KTgDRadfB7tL40gcSX+pMvku0T3fEq+AvaP+uGElWKahE1VkwDdIh 2dEnqSAdyrTs6/nerZhoT+3uJWfSYWxLFn3G2NPHvvnauRZ5Lw3/niiEB8ZWoY6gaBhdweEFgld W/apouR7xpijaODq7F8eVVXOG/rj17gzKSIBE2+fh7U/yO5a8w3OXXRX9nZcTeMDf5n1HUk5VnJ Z7c7OlLqXezVKro3b2VuqZ8iA4VLD42cXCe6VGvVcITEBE1Inex+bnY0ZC16D93c/sjRO3q+lVJ 4i9Qo2Qahb0WRZQ== 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..4857bcb6d4bf557a0089f51328e= 75e8209e959e6 100644 --- a/lib/ref_tracker.c +++ b/lib/ref_tracker.c @@ -8,6 +8,7 @@ #include #include #include +#include =20 #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; }; =20 @@ -93,6 +95,15 @@ static void __ostream_printf pr_ostream_buf(struct ostre= am *stream, char *fmt, . stream->used +=3D min(ret, len); } =20 +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 =3D (stream); \ @@ -302,6 +313,20 @@ EXPORT_SYMBOL_GPL(ref_tracker_free); #ifdef CONFIG_DEBUG_FS #include =20 +static int ref_tracker_dir_seq_print(struct ref_tracker_dir *dir, struct s= eq_file *seq) +{ + struct ostream os =3D { .func =3D pr_ostream_seq, + .prefix =3D "", + .seq =3D 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 =3D debugfs_create_dir("ref_tracker", NULL); --=20 2.49.0