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 6A33F258CD8; Tue, 27 May 2025 11:34:01 +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=1748345642; cv=none; b=LpD+NRnlXep6bH7PggLok/UIbfzs6l/LeHw7QNfQUEeL8k41xVovXd2+uGYXH8fkkm8YOAZpWmqOZjoN2Trv3L2NfrSlmCoyu+7B6Q4wvipp/BuYL3HVa5qhHJPE7nPrW/rp35rGpGpLpa/NA83QEGv3gufmAZEJWVjWy6Pbj8g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748345642; c=relaxed/simple; bh=1AohjNsJ/5u7SWnSQ59F0LOjK/wKNx2WHjos8H9MEes=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=M08Msh0M1BLF/ysuW9XkHVZEsriJP3DMEwKJxt+1pNKydW+BvKrG35CwnlUPcdSzL4GyWp9YwuYxeizdyjSMCr+yUKFTCFDBW7F7r7fA+ftz78CiW9oRLZM7zTFTtBjH33D/qon2URUtJ0aeflNchSpyi+hkzwWhlFLY9vSn4lo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=P/Qd9G2z; 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="P/Qd9G2z" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9E14EC4CEF6; Tue, 27 May 2025 11:33:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1748345641; bh=1AohjNsJ/5u7SWnSQ59F0LOjK/wKNx2WHjos8H9MEes=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=P/Qd9G2zvDpVWcyRAxVqjoE4w3rXgBziU37W5NbgLORAm8RSpoyDaPmetz64T450S 8W4d1+J1WXbT8Dnb8XkO92tGGLlavpAlKfd8lWIxZqF7hw18V8sXUhZn5b5JrrYYsm bNG4CLpuXaHnmpvD5xyHfeIwbyC+HvdmPoGdZJ+k1PxbBu55lpldJFpChlOTAl4gNb 1Mpzoz2JGjx5agCZqbT1wyKc8lJFQzAfn5bDxkIn5SoWrxqLrgq8NW/c9OXZN4UNA0 3s4bfCKqNOsxCfhMlEqkIwedcLSvwvK/RFR8xZpo+Rll2jcss91meTypABrppZb+GY 5VRPXu7YeLd2Q== From: Jeff Layton Date: Tue, 27 May 2025 07:33:39 -0400 Subject: [PATCH v10 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: 7bit Message-Id: <20250527-reftrack-dbgfs-v10-8-dc55f7705691@kernel.org> References: <20250527-reftrack-dbgfs-v10-0-dc55f7705691@kernel.org> In-Reply-To: <20250527-reftrack-dbgfs-v10-0-dc55f7705691@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: 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=1849; i=jlayton@kernel.org; h=from:subject:message-id; bh=1AohjNsJ/5u7SWnSQ59F0LOjK/wKNx2WHjos8H9MEes=; b=owEBbQKS/ZANAwAKAQAOaEEZVoIVAcsmYgBoNaMXOK09R4jSfVB8gdNvrjW+aO6jrUnbP/1CY t50wMnUT/+JAjMEAAEKAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCaDWjFwAKCRAADmhBGVaC FWixD/0XOX0kufIOnTf3V6fk9Dj2Z799XOtudAidPehZJIYIpgM+dc/y4A0UGc6+g4tzsFajs/d +EbxW+wxUHHECScP0IYHUAH28rjwGO1+f3lcMuLwKnBBmT1YJ4B/jGjyvVOD4QvyprabwW1ZT16 Ai4GJrycV3b3Rj8HSxqszYJYEwriLCk6Dhspsfc1JLbAil7z023a09hSxK0WNTpuyWMzn6nYyLt a/6adaQ80qAAMMWh3ExXjMQOcI0ZLfEwg8JGKN+fGgEDG+Ykiiq3RSM3gCsJXbcMbL0MetJL0T6 iIe7pvaBin/cXCToQV9ovOY+bJJJVcxDJn4HxZmb4fF7FGpJm8MF8Zts6zhlpvwEIG0+8BKdj6A Mn0neHMNrBPjT7Wha87sOomrhVsOXmSxj5Psqymw3t5U9Hb6ocsX+hlJRn5IdDb+nZ1aWsTb/KI gh0JBC1CboF0FDEyj6rYSyRG8nORrrNPVATqd1tENMP6qck3pAB2FBZkN3Occw8WKTJdKJlRND2 VeD2JrZ/c7RIj85RloOhGKCYd0/ccDBtPCBdfmr1TJvCr8YaJuOyQH8g1My1nVugBRkFHMZchc9 +JLZTQUit3FPgvYwt8ZtR2TR3VUzr62fzQnhB0Bb/t7EHhtHhbITaGuIYUFdWty4gAfNuciD4Fg 4ivEwns6h1Z5WFw== 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..39b01af90d240df48827e5c3159c3e2253e0a44d 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); +#ifdef CONFIG_NET_NS_REFCNT_TRACKER +static void net_ns_net_debugfs(struct net *net) +{ + ref_tracker_dir_symlink(&net->refcnt_tracker, "netns--%lx-%u-refcnt", + net->net_cookie, net->ns.inum); + ref_tracker_dir_symlink(&net->notrefcnt_tracker, "netns-%lx-%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 = &netns_operations; #endif - return ns_alloc_inum(&net->ns); + ret = ns_alloc_inum(&net->ns); + if (!ret) + net_ns_net_debugfs(net); + return ret; } static __net_exit void net_ns_net_exit(struct net *net) -- 2.49.0