From nobody Mon Feb 9 05:53:08 2026 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 098D1185B67; Tue, 8 Apr 2025 13:36:53 +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=1744119414; cv=none; b=NohDnOCoDYkG3OiWPd1I03wZDcyBJ1dLCe1OtG7DxnbZoANuSs7i/5un5klTKRG551SiN9WWuD5E03EBWteyfnROcWQsNn30i1YmMDHr9gGujZ70HjJ48gT89oPnRYTJjhGGarXMAJt/cD9DJIDhgFp+uaWJHNWCsUzttZQFDM0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744119414; c=relaxed/simple; bh=wQsp5J1EcuFFHif+tsylNm3FhK76SHt9wXjFj+wEf3M=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=PE04QvpRRPxkoNDZ5xBU9HNpgLrDt7dlXANvscWJHGgY6gOMV5NYmUr64HrCW4Wsb/tA/nJNEAWAbUViOprRz5E8lu0LKaV/J1ml+wCL8HW/3XyMhp0FZZqlUu/CXljdE6/DihHYha27qEzzMtWbgshNMwu1G9hMxPZBGEmGuVQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=bY/vcnvP; 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="bY/vcnvP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BA8A8C4CEEB; Tue, 8 Apr 2025 13:36:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1744119413; bh=wQsp5J1EcuFFHif+tsylNm3FhK76SHt9wXjFj+wEf3M=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=bY/vcnvPUYmNxnsol2gqaDUPwaaY27Fb3J5fGGtDsQUOxGojbiIKBQlkeie8//XSL wtqpMDnHsl5C93rO32/7Fl8FCFPr69UVjFxaryuocQETZLhcPvwLvRwlzO5HeR8lZb 6xwDfNLN0vrHpDLchUxt6UjcC96fh04PAiD9OOthGWOVnulo2VUVtfrPVj4qgivgdB bINyXgVP22XdjQpT33SNlIO/19IlQjMgEwjhuGmuRaGHEvPerbyNc4MwH5ncAs95NS 3zUlt/6oSu3peDQrEFIYo1fZSfQF5b1qSRpajKOMo94w4jxVxn9+L+K27cjI4yryRa qZgc+w7r4h1ig== From: Jeff Layton Date: Tue, 08 Apr 2025 09:36:37 -0400 Subject: [PATCH v2 1/2] ref_tracker: add a top level debugfs directory for ref_tracker 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: <20250408-netns-debugfs-v2-1-ca267f51461e@kernel.org> References: <20250408-netns-debugfs-v2-0-ca267f51461e@kernel.org> In-Reply-To: <20250408-netns-debugfs-v2-0-ca267f51461e@kernel.org> To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Andrew Morton Cc: Andrew Lunn , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Jeff Layton X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1831; i=jlayton@kernel.org; h=from:subject:message-id; bh=wQsp5J1EcuFFHif+tsylNm3FhK76SHt9wXjFj+wEf3M=; b=owEBbQKS/ZANAwAIAQAOaEEZVoIVAcsmYgBn9SZybrEoQjvql5c5cYD8ycI1vabhPh0yMJTgW hRRetxqTWWJAjMEAAEIAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCZ/UmcgAKCRAADmhBGVaC FSrVD/4oywdR9mRHgb74ldsKYET0Fksc+td7NwMPwTYzsfkn4GJNv7v19nhIeIqcTBhcnL5qqtO eShxNkeMViFZrBk8LxtcRnZG2CxaEoKNWK8jk8jABMooJq+Oy/7Rnphq3HA3ZEPpxD/HbNBJyUv S1yH6Tp0EojbMZ+mPQ241OLSSwsGQdRHYmofRuuO3OeTVacltwA3uVhSV9BwNoqEI5a8Y+6Khw0 xggAddEfR+5zfgvJJv7smocMChkI47pBAT4Vy8tBTvAdniOgDl9UWbxU9qCh9wQLO2Cnaf7rOjD HJ4X5/N2neywf93tk0xniE+wRSEosQuQppFgzbz0/KnR5YCdrj5EX8VM1j1Q1PzjydktuiBW3eT YZ6qz1mzfHpAMqw5NzRdLPap3XPXD7hxSx54emdhznZ0/xPKfbR4Rh0V97E5kiu8UFfzN8xKTwo 5k1T9wF+RwCeICm9dfr5i48ETdDU5pVU4D6JIFYXwZEHX617Avm+JgWkdjneDosWRaMXX4QqaQH rTVDOxabEOygFwqzW2TBTzGU+0s/z5GKlbAXx+nGLln020SfSbeLdHpwD7fG19ddYGaiyEi2RmR 3oQ/KWGKBenOWZP6NltALXV7Q4WiPCuH1VRivo/H1j3IB/nMeIKXOMRTgIjere1ydw2Xd5e56hx AKxLijxDi74FDkQ== X-Developer-Key: i=jlayton@kernel.org; a=openpgp; fpr=4BC0D7B24471B2A184EAF5D3000E684119568215 Add a new "ref_tracker" directory in debugfs. Each individual refcount tracker can add a directory or files under there to display info about currently-held references. Signed-off-by: Jeff Layton Reviewed-by: Kuniyuki Iwashima --- include/linux/ref_tracker.h | 3 +++ lib/ref_tracker.c | 15 +++++++++++++++ 2 files changed, 18 insertions(+) diff --git a/include/linux/ref_tracker.h b/include/linux/ref_tracker.h index 8eac4f3d52547ccbaf9dcd09962ce80d26fbdff8..16fb6ec0cc7adc24457cfab13ee= 3994d85c15b39 100644 --- a/include/linux/ref_tracker.h +++ b/include/linux/ref_tracker.h @@ -22,6 +22,9 @@ struct ref_tracker_dir { }; =20 #ifdef CONFIG_REF_TRACKER +#ifdef CONFIG_DEBUG_FS +extern struct dentry *ref_tracker_debug_dir; +#endif /* CONFIG_DEBUG_FS */ =20 static inline void ref_tracker_dir_init(struct ref_tracker_dir *dir, unsigned int quarantine_count, diff --git a/lib/ref_tracker.c b/lib/ref_tracker.c index cf5609b1ca79361763abe5a3a98484a3ee591ff2..136723eab6b17ae07132c659fd1= d8b0690d8c2d9 100644 --- a/lib/ref_tracker.c +++ b/lib/ref_tracker.c @@ -12,6 +12,8 @@ #define REF_TRACKER_STACK_ENTRIES 16 #define STACK_BUF_SIZE 1024 =20 +struct dentry *ref_tracker_debug_dir; + struct ref_tracker { struct list_head head; /* anchor into dir->list or dir->quarantine */ bool dead; @@ -273,3 +275,16 @@ int ref_tracker_free(struct ref_tracker_dir *dir, return 0; } EXPORT_SYMBOL_GPL(ref_tracker_free); + +#ifdef CONFIG_DEBUG_FS +#include + +static int __init ref_tracker_debug_init(void) +{ + ref_tracker_debug_dir =3D debugfs_create_dir("ref_tracker", NULL); + if (IS_ERR(ref_tracker_debug_dir)) + return PTR_ERR(ref_tracker_debug_dir); + return 0; +} +late_initcall(ref_tracker_debug_init); +#endif /* CONFIG_DEBUG_FS */ --=20 2.49.0