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 165B5235345; Thu, 29 May 2025 15:21:32 +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=1748532092; cv=none; b=AvpQDLDSrK6tmeaBamDkzrnjGcRx50XOa6EEpi8XzBadm8WRM9rTuQOIEAIY2+mz+HzHeb5muh2SGJyo7/Q9YvWDNp+asR/HIf2SBVz337bi202NfwTiLdiLJABmeHHv4CLS1VmrScKIUN88wkClhOwd/uelbIKYv5RzLw/zq4k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748532092; c=relaxed/simple; bh=C3NjXad8atSO1FZ7CKOXtU5VIRqVojZ9jejAtjAiqWM=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=QwQuuNANMNOseRI8wIgDLd3YEgG8s6f8pESSO0EkCyQE6Ay5t4Zg0qXapGiZk+45/4gAklqVwD68UGBa7L+y+Um299ZmZX96xD+ItqreC4KHF8SZ3hHbyK+Dlr/RewK7kESwBO77RxBQgfT6xQyXfFm2WLO4QDkHubjhYyFhOoM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=kMF8Sw7x; 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="kMF8Sw7x" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 30A16C4CEF0; Thu, 29 May 2025 15:21:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1748532092; bh=C3NjXad8atSO1FZ7CKOXtU5VIRqVojZ9jejAtjAiqWM=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=kMF8Sw7xGxLd2lLIJfHrmy5vA4hkuQ4Rx9jKUmNOcFU4SlNiGf37zVLhWF9c4QtSS FR50PlvR5XEMhwJMVlDlhGXp5WHdIEsWJ594r+nuckuJUAuFASjiMuih6yramz9vW+ 6PXjdqEc08WZCfYVNF14+DD2Cvx63WPP6Gmon9hhIe6csZ0fhbfADDzjwvqslAJWrx iqN96dVv9GsQmTMZPJ9yk4jPQYzPQ9Sz2pW0Aca1Rd1OZWNwc1onAC7ZJYGxDqTy1F ZI1vBpRqyMlyLSUfCDxf0omS4zON78XzoAfgHJO2Vj6cQKqeW/WeoI/fCiKX9r4mQO zqvFmv7QTK2Cg== From: Jeff Layton Date: Thu, 29 May 2025 11:20:45 -0400 Subject: [PATCH v12 09/10] 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: <20250529-reftrack-dbgfs-v12-9-11b93c0c0b6e@kernel.org> References: <20250529-reftrack-dbgfs-v12-0-11b93c0c0b6e@kernel.org> In-Reply-To: <20250529-reftrack-dbgfs-v12-0-11b93c0c0b6e@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=1850; i=jlayton@kernel.org; h=from:subject:message-id; bh=C3NjXad8atSO1FZ7CKOXtU5VIRqVojZ9jejAtjAiqWM=; b=owEBbQKS/ZANAwAKAQAOaEEZVoIVAcsmYgBoOHtnfvs9pjt9Rl/Zi1M5/arux6vA5kyN/T+ZS u/b6du0baCJAjMEAAEKAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCaDh7ZwAKCRAADmhBGVaC FeKyEADFuEALcfM1T+CmjS0c3/YZIgncuvz52TkQDFPi0tjbtjgQ3LudJoo7etZ8rvBceo7C0iG uuVkKViJ9NfLPCkZlBFGaaBw7RLHB3prepzbAdB4eG73DxKsgJ34q8vetVbUoOZ3V4M28YQTEk2 q94JijT6UtOGSprbC24ZeMyS3lyTlowAXsPZ69e+cEMmXoVE1tY9Jp9mUI7GDaTUj8kdUeSXEIp KsG6j8EftlyMcq28lgluPKB7MM55t8wotNkIXjM1NST8TH5vm8M58V1vdEhIY89fw0RRMuf3Pjx cxdNLZ2bhnYDQQ9VDhRrBj5JuhS8COXIUzKOe3coikPzx9Ikw2Hc2/7eJjmjHuifruHeRGBdY71 Vr1nfvjG7Ppv+F3tdundvJwFko77oWah1TDiLii1huoG2TXQjF1y1M+W2IKeJIWU+oqF7Pg1ZNk mvT9h9Ccw8nOQT2GcpP8JO4BxjE9jWsZkh0sX3cP30Vrbaelk0nBOL7o6b/LpibfVL/pqGxki6p Hftz/VRStYEnklLMV3Vf7PAPTt6MjrtOdkg4SkcU1Z1FIR8uQEidCPmldf+SlyQ6f8xqwrQLBSj abvvnUSLoux7PtAwCSpYXL4t4ydPJ7ETfZs2JM5bHwjmSgysCsUaNZptRlMg4uUU5w3a/ncqSoF 8xKhRtbCmMdpIqg== 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..b2fd9c5635ecf8fccd48f1d5b967a5c6c41cfec4 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-%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 = &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