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 D3D8C24E4DB; Thu, 17 Apr 2025 13:11:29 +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=1744895489; cv=none; b=QAEacbGNB4OTbvDVeSGWdKu9sjgZHLV7CJeE60NCvRu+Zh3PnSiMrZFAL92ocjq/Mp17ET55VbjdKAHuo5ByLx+oLl/YD6uqZDiXi16ivLjrPbxHza2vc3kFuORSLIpOVz/pWkgyUH7ga8U+Sz2sG3tsD2pXBr6/TLoAz7YlsIY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744895489; c=relaxed/simple; bh=aWTjfRaEMobezFG2YZ4FN2sK+E4zsG1rhipWv1lxbAw=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=gJv0xwn1yJDZQmWWqPYzk+lfRmjtz0LK78a5RipgGWHgOxVKbp8AFzPY1Hm8CR6/QVTYzgJqcWUafhLVs4AOxWBlGMWIjA3EoXI1AERafYXwf/Qk9I91/4oEq8fkmPM29pHNQq69WHrt9tiu5TJTfIXznheauOYdpLv9R5eYeC0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=LOGQmJYk; 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="LOGQmJYk" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3AB60C4CEF3; Thu, 17 Apr 2025 13:11:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1744895489; bh=aWTjfRaEMobezFG2YZ4FN2sK+E4zsG1rhipWv1lxbAw=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=LOGQmJYkw6dJ0WI3d0aIK5DU7DHz9bIWVeKDmETU+MvUQvOEX8XJJDuZNDk4MAFTk BTC1FWPVz9RHj6+r7HFhHwIaQo1kbDBJU3jdMggbD2bYUo0DsKEM0Sp1+Pa1hCxtAV vHcIiWJoZx25Oh4eayF1XyQBfRL3ZY1X5XfbzTQ67lW2lTnyP1JBKepUEe0HqWulmA mpUaxoU0mKw9Xy2gIhXdLMV+Yw0CsX9eTd4kggGNNBlTxD+RvcXT84ew9mEjWgMGNL RReGlNNMqGN1CIinuFYhSFyP3cq0W9RuWT6wM847DnUSMa2/1USukJKuQeNNLKyjAt bUq7YicSMrzNQ== From: Jeff Layton Date: Thu, 17 Apr 2025 09:11:10 -0400 Subject: [PATCH v3 7/8] net: add ref_tracker_dir_debugfs() calls for netns refcount tracking 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: <20250417-reftrack-dbgfs-v3-7-c3159428c8fb@kernel.org> References: <20250417-reftrack-dbgfs-v3-0-c3159428c8fb@kernel.org> In-Reply-To: <20250417-reftrack-dbgfs-v3-0-c3159428c8fb@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=1870; i=jlayton@kernel.org; h=from:subject:message-id; bh=aWTjfRaEMobezFG2YZ4FN2sK+E4zsG1rhipWv1lxbAw=; b=owEBbQKS/ZANAwAIAQAOaEEZVoIVAcsmYgBoAP33wfsZXF9OZOsXYJKn+4XxG4pgmpagfhh0H ps4ydpIRryJAjMEAAEIAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCaAD99wAKCRAADmhBGVaC FYhhD/9tbmIoudXwkXHL3mGnASG0+sRoB+jMVGgDLT7hVec5WGkfL3L001+wgG0tx+EyOcNHHw9 COc1g47tILUmvuHhohuSGOSiSnp8BiufIfdLeNt6MPvhtGunKuq0+7o56gpioPfYxFsUFpdEBWL tORMdzIuL3M7aDtjKrolimdjYPqLf2yfXr/iWdnNnsBTdj9FfASYDB8ZX35jh/q851+jtF0H8f4 0RvOde9hR/dmapZxdOUFn8RWtc+3xUGixKFPIxOzQnfriN2RyYEqcOMtMwqjLOibimpqIc4HpPN GBBfOcLS8P3XUn/IH+LT6FUKKCztj3V/5XsJlOLlz2CEz6jxG0jMDF+xnrNltETbmp6JVuL8o9F J/FfHdKzDXJlchcyMsXFYsstMSv2eCzduBv2iZh0Xnm6H9CNEAn6LEiJV4RtFRTbkYbOyD2ZrOa PAJniIhr7ZW+B4BaeWoJj7JMCLEfd/XZX/FMPdGESLeseVRwtGb7NgB6YjtK3WLoy46/HgWq2I/ 2lua6HrkrMX4wbKBIkfvo1tgyN6ZkrmLJtpYS9faEauxpuosg6jqPx3z+zbnE4zbtLIl7XgXzGM 7j/VFPd1RMQ+kZjQE1hElS3KJWjPYI8HGmfzehlV/KYzUoWx/oUWFcvtc7wJHe4N+d5eczntjbU aDBY1V75yiU8tXQ== 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 and register the debugfs files for them. init_net is registered before the ref_tracker dir is created, so add a late_initcall() to register its files. Reviewed-by: Kuniyuki Iwashima Signed-off-by: Jeff Layton --- net/core/net_namespace.c | 34 +++++++++++++++++++++++++++++++++- 1 file changed, 33 insertions(+), 1 deletion(-) diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c index 4303f2a4926243e2c0ff0c0387383cd8e0658019..cc8c3543e79b2b6948fdbe4080639e3dfbabda15 100644 --- a/net/core/net_namespace.c +++ b/net/core/net_namespace.c @@ -761,12 +761,44 @@ 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) +{ + char name[REF_TRACKER_NAMESZ]; + size_t len; + + len = snprintf(name, sizeof(name), "netns-%u-refcnt", net->ns.inum); + if (len < sizeof(name)) + ref_tracker_dir_debugfs(&net->refcnt_tracker, name); + + len = snprintf(name, sizeof(name), "netns-%u-notrefcnt", net->ns.inum); + if (len < sizeof(name)) + ref_tracker_dir_debugfs(&net->notrefcnt_tracker, name); +} + +static int __init init_net_debugfs(void) +{ + 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