From nobody Tue Oct 7 22:02:05 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 220D82EE5F7; Wed, 18 Jun 2025 14:24:45 +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=1750256685; cv=none; b=QvwkjbbmciSKxUBKcxje8FmpSx0aMYrQE6NglNzA+fruMCZ/vHckMDSdF5y2RJ+jun3oh5YVzC+IM16P1Pqpou4XOZnhCihS/hwlYCz8ei370J4xn/S43ykgHEnhZ+oD2aP3SeGCR4Wewm0/gr5F9PPLmqQ+3ZZBee21Cq0azwk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750256685; c=relaxed/simple; bh=YMnNgfS5IcXRGDhGxBj9UTTtfo/Re9Qj3nh2BIc6ugE=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=FTObjvHPMkvZFhetzDG8FBcSLlg4+ri33LePKoHYuiZJIeiX0IvLei5AHKh/nLQFaYCvWNoad79JeTr5S72DLqqOA0k5nVV4S7s60CTTw32SNc82f0GjQNFQoKdIqNvdzu/c5pRtOeqIE/SkhH2ppExVvf47u05T80dEaezMPFM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ULqi2OtX; 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="ULqi2OtX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 090DCC4CEE7; Wed, 18 Jun 2025 14:24:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1750256684; bh=YMnNgfS5IcXRGDhGxBj9UTTtfo/Re9Qj3nh2BIc6ugE=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=ULqi2OtX/7uQ/OyVEFJUJbHWJf3scVmdfB1Syvh1A4yU2en3qY22gH5zbO+8gRnRa hkbFmDA2P6JVzt1LFORxfc146FtCnKyYkkEofHabLnYIa9NegiYDfilBFz4uDXKRiQ 5uR3h8wbJ4IRinqaWjy5tSJJYJtD7kVJaSQ1TDeh9IJoA1LjQMR/fQtzGIqwspuouy oK6qxAsRjkOo6Wgp8EBDzVwUXpIfaNSA6jmunz57dkdgBW2yAuxrzAhbNVpGqagV6j AQFHZkqiiWnGTZdk0nigGjp3zDt1t+72/V4fBpgOev4AvDA6e8kagEYHVa83WlxwJs UkakWSC6iLfKQ== From: Jeff Layton Date: Wed, 18 Jun 2025 10:24:21 -0400 Subject: [PATCH v15 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: <20250618-reftrack-dbgfs-v15-8-24fc37ead144@kernel.org> References: <20250618-reftrack-dbgfs-v15-0-24fc37ead144@kernel.org> In-Reply-To: <20250618-reftrack-dbgfs-v15-0-24fc37ead144@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=YMnNgfS5IcXRGDhGxBj9UTTtfo/Re9Qj3nh2BIc6ugE=; b=owEBbQKS/ZANAwAKAQAOaEEZVoIVAcsmYgBoUswZ2MQDxuR/bgGgaU7roXXK3jAFb6b+3gRcS 2Gh2m6jG66JAjMEAAEKAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCaFLMGQAKCRAADmhBGVaC FWbzEADGmjNlfCIKt1Gur8k7XtE/w1mW0K4oZJEjKP6do61OM8e8nqjb9qNpTPPNIqPRS8ksLAT 7fxTEm8eKTPUzIFDNRl6j5gL5lCtGFR0ZLLdC7VrHQzVuNhoXyKTKKkWxnrwIIdLS7nGwI5p1VM w6e5BGFGMJgplw18uRbfjP5B6WJx+L6Q/2MfGXx+TwMiJRZMKKDmnTz6qVtd252m0a9ZDf4KWZE a2VD/tO/NU6T+ix4piM6P6WhS7rUpMzfdMVDtQ/k1hGIJaWTNDkawiaf4l6tT44Us5F9uSBCHRS DW8Y/xShIRKCT6qviKNXeDEZ/DG21lX3PDhJelE+hvsc3E+Co6FD/5p3ZLIBIbvt1dgGPof0+tH K1er113ZqMhxLFjGI6iWU1Vr9rXsdm7jvkTfkIJNl9a20/ltGUQ6uF5aVgmLRhf7cmihN616Ht3 bZKen7vLJ5IRhAVR/Zf/VPwJdajFITJbfqnSyBFiXA4zKGG+GkJzaecll2x/BZrZKa1SejAUqVN +GRWo0tm5msdh1EaliOk00PjSzeTh8KLepeEmLJlW4ppgsa1kJcmR3BVr1GfuGpwXExPb5MA6/o j2YhxO9fLrNhuHZnFoiE9aqKMcIexE8krjzHceVH0zikTPxGYwqROKhVDMlgdyT0NjdaDQewznW Dli1BSjXtLm6TjQ== 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 aa1e34181ed6f353921a23411fa227b612db661a..45de05d8f0877a4e717bdad4ed7= 76ae27f98944a 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