From nobody Tue Oct 7 21:48:15 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 8B5C5236A79; Tue, 3 Jun 2025 11:27:42 +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=1748950062; cv=none; b=gsxRXx4Q3jkltwxH+pziL7ebLSJ/OczCmY7TLv2WiGgafnxzlga836MeCR8nP4u/Qmsh1uQ/J0Y56YNFRpwhtHo2hDo1xD33Ce2pTQOo3DmV4D0AKdXXc2AX/x+ldA/X3uBGRf6lbIRakr/Miw/X4YmklNPT9OrLE3ziukjRY3w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748950062; c=relaxed/simple; bh=C3NjXad8atSO1FZ7CKOXtU5VIRqVojZ9jejAtjAiqWM=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Rh3URRMdBPhRlqyiajw2wFGlS5VIDq3PlyJqoxeyBctWXfIQJm9ywJl54ovT2OcBW8saWAr6aTYLCUPhNZguhq6IO+P15GfgPjxtiD37ok2LqdZ/MtklHGh9kI+r6cOrMc6saffutmaXaxCl8/BjHg9KLke/a56qV4Gy46cTvRY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=nJWf9PqE; 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="nJWf9PqE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 77930C4CEF4; Tue, 3 Jun 2025 11:27:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1748950062; bh=C3NjXad8atSO1FZ7CKOXtU5VIRqVojZ9jejAtjAiqWM=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=nJWf9PqEnvvty5KAcKmlN+gkgwCN0pRwDvUNlP/s8LJeimjpochQRjmhpblQs21qj UMrRB+Yp+bEhCOd6pNKooz5fDGl+bTfP0GkfD3//TUHuzii0hy30L+cBBdh5WkzUtc lwURWzi4/xjLBnqN3RjMKDPvxVqMPSu+YU2gfT3Y1muPT7AG5reR2pbhYLJHEcydD7 LEfFVgtwkpd6hcqPrIWNJiZj/xWcW1YBkevQ9i1+51q9eVQflfRyV4zU1bKxCYHD4o KcHT05jzWcdzV3YBpd1lvtIo1eVSdB/ghWbakGddINUODqsJPSLJqwbtXKDdkp6p0/ ilj0aa+DtjJhw== From: Jeff Layton Date: Tue, 03 Jun 2025 07:27:19 -0400 Subject: [PATCH v13 8/9] net: add symlinks to ref_tracker_dir for netns 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: <20250603-reftrack-dbgfs-v13-8-7b2a425019d8@kernel.org> References: <20250603-reftrack-dbgfs-v13-0-7b2a425019d8@kernel.org> In-Reply-To: <20250603-reftrack-dbgfs-v13-0-7b2a425019d8@kernel.org> To: Andrew Morton , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin Cc: Krzysztof Karas , Kuniyuki Iwashima , Qasim Ijaz , Nathan Chancellor , Andrew Lunn , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, Jeff Layton X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1850; i=jlayton@kernel.org; h=from:subject:message-id; bh=C3NjXad8atSO1FZ7CKOXtU5VIRqVojZ9jejAtjAiqWM=; b=owEBbQKS/ZANAwAKAQAOaEEZVoIVAcsmYgBoPtwbkd0+Vc5/RnhkEbQLT4EKS5SAlBOjIR8p6 BRo+WaHO3aJAjMEAAEKAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCaD7cGwAKCRAADmhBGVaC FREPD/9x+zTUX2dX1RQhNJM3fFxh5Ld2OWYtR6yA38853uwtfD5KYH/wclEWNZhqqLAuhBSkbI0 Z5G2lVl4J77oUYo4qNWbj8F2K5r5POTQeUd1gAhmkS7h7jIH6VzMq1gaOp8+ye4fkSLfz11Iv8m JQthJknt7p+JajHmnbdTz6jLwx+eVrM2uXslX0zFAB+40fQyXZUlwwI5aA+FywvXze5seYOAe13 H3APF9c7uFgrm8uT5+I81NrgDdV2SP0cAEZAknaTgsZUG5YLoVnBmQNdBjhMYBRohz5t8w4Xfm6 hx+bXi41LnySkKb2WAgPwgWf7Ey/dHIBmL2+f2eIs9uxV2/Bi7eMtf+bGu0Qya3+w9OWWwJyMnH M7o3vIXk7ZzSugtviSLHxvX0cwpGMXHaPOGgAFIHPE3DMyJeCyNSl+XBPqHQxiN1UYgA5gFfiOD wwrZ9va8lfDOj9n4V1RSrH+x9L0+e4V/OJt2UzrH64wO7NLSInCLNWwdkeq7cEOd1/5QLFOSg02 Btf+yYu7fCnr0GA6wnT79mrYKFefjZ2TErUn472EQkIkQCeBLwRcvlDWFxSYqG1icOO2zi53NQ2 Q8FrtNw5N0chfEC29xvMQOqyNG/pdBjGS2eNPLbcKzTW8Go49U+Bp4aXkI+AKU9udDUcDJrc22b fOe/pMX2g9cQ/iA== X-Developer-Key: i=jlayton@kernel.org; a=openpgp; fpr=4BC0D7B24471B2A184EAF5D3000E684119568215 After assigning the inode number to the namespace, use it to create a unique name for each netns refcount tracker with the ns.inum and net_cookie values in it, and register a symlink to the debugfs file for it. init_net is registered before the ref_tracker dir is created, so add a late_initcall() to register its files and symlinks. Signed-off-by: Jeff Layton --- net/core/net_namespace.c | 30 +++++++++++++++++++++++++++++- 1 file changed, 29 insertions(+), 1 deletion(-) diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c index 8708eb975295ffb78de35fcf4abef7cc281f5a51..b2fd9c5635ecf8fccd48f1d5b96= 7a5c6c41cfec4 100644 --- a/net/core/net_namespace.c +++ b/net/core/net_namespace.c @@ -791,12 +791,40 @@ struct net *get_net_ns_by_pid(pid_t pid) } EXPORT_SYMBOL_GPL(get_net_ns_by_pid); =20 +#ifdef CONFIG_NET_NS_REFCNT_TRACKER +static void net_ns_net_debugfs(struct net *net) +{ + ref_tracker_dir_symlink(&net->refcnt_tracker, "netns-%llx-%u-refcnt", + net->net_cookie, net->ns.inum); + ref_tracker_dir_symlink(&net->notrefcnt_tracker, "netns-%llx-%u-notrefcnt= ", + net->net_cookie, net->ns.inum); +} + +static int __init init_net_debugfs(void) +{ + ref_tracker_dir_debugfs(&init_net.refcnt_tracker); + ref_tracker_dir_debugfs(&init_net.notrefcnt_tracker); + net_ns_net_debugfs(&init_net); + return 0; +} +late_initcall(init_net_debugfs); +#else +static void net_ns_net_debugfs(struct net *net) +{ +} +#endif + static __net_init int net_ns_net_init(struct net *net) { + int ret; + #ifdef CONFIG_NET_NS net->ns.ops =3D &netns_operations; #endif - return ns_alloc_inum(&net->ns); + ret =3D ns_alloc_inum(&net->ns); + if (!ret) + net_ns_net_debugfs(net); + return ret; } =20 static __net_exit void net_ns_net_exit(struct net *net) --=20 2.49.0