From nobody Mon Feb 9 00:54:02 2026 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 21F9B29A3E6; Mon, 28 Apr 2025 18:27:12 +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=1745864833; cv=none; b=ndLHd8WdowTHX2PwwRnc1V1kuxLxqPe7L8/LZ1hpovRlNSdGwb6Sp6G6l5ZQdPzGGPCg4kdy+nStb2qFgmDYjhwOhEVUjYhlSbKoCStpU2Jy/OO7h6BTA4RDgRwvRXQxIUQ4lslENvAMtOIEqyx2DBGKWkuJZyia8r+LmutFm04= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745864833; c=relaxed/simple; bh=HxYYob4i7WkZ4QVFzXDuapuOVvHl8o21L1EhBkSyHxk=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Zr8r2Qo7hFEzIv0cZGVafyoYd+Z8DlO2T6mBWCGtBqERRIV43BSCjT/maEID5PAx0ldn+tcVC9GMeMi3NzepAbHbpe6JrzqWAoxNWZyztBNZ9DvRKu6XoBE1WKWeQe1zX3LiS/PQ25rnHpsYTQG7n1c/StzEoRSBJKlkYvWJjqc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ROUBUlXP; 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="ROUBUlXP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 08A5FC4CEF0; Mon, 28 Apr 2025 18:27:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1745864832; bh=HxYYob4i7WkZ4QVFzXDuapuOVvHl8o21L1EhBkSyHxk=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=ROUBUlXPD3eKLlzG4sQHNnNBoZW0cz/EGuOl2q7VbT09u74yESrZWWaOyhFSo748a vy68Fpcsm7U2UWBKOpl6AqLQj+JkuXu/S+Q84qkFSB8tEMYldDJHKcg8bM7FwuBwrw KLsrZR99QpVZRTKTkt6kHXR4v8MuVHrJX2cJngZMwHoK7oL3mFOxK/oiLCFzfbI4Vy 10qF7ZDfmNbxJAw2BrrbJDxJqryDaug/l4kjwCZMiLhYC+H1AsDo9PkYF8JuQSpCpu FN2s34oVZFlWlOHiiMNqCV5G7kSdoax25/7s+n4og8b6gPrVioy7fTahXAO2kPgdSB m5gzPmzv2YEeQ== From: Jeff Layton Date: Mon, 28 Apr 2025 11:26:31 -0700 Subject: [PATCH v5 08/10] 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: quoted-printable Message-Id: <20250428-reftrack-dbgfs-v5-8-1cbbdf2038bd@kernel.org> References: <20250428-reftrack-dbgfs-v5-0-1cbbdf2038bd@kernel.org> In-Reply-To: <20250428-reftrack-dbgfs-v5-0-1cbbdf2038bd@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=1775; i=jlayton@kernel.org; h=from:subject:message-id; bh=HxYYob4i7WkZ4QVFzXDuapuOVvHl8o21L1EhBkSyHxk=; b=owEBbQKS/ZANAwAIAQAOaEEZVoIVAcsmYgBoD8h2GIUwsTMOiBkykV6nuYvnnAsHTw4T6X74O LiXbumtkWeJAjMEAAEIAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCaA/IdgAKCRAADmhBGVaC FWI4EAC0+pEyulF/sfWI4GSW8V2DaQRCQDfMCa92oSSE+i2/vnZtDa+FhiFKqLgJ9Qbc3zIWMlh 6uP25y50Qr1XSgtQHIKLfeef4UngKWy95iLBqv2QtI+uzKXMUkUQ4bkIBiHwxjtW8lZ3uHuHHqn grX6JJ7bmKjqS/PaFPftvv5d8wfpQgmXNiZTtxGEOP7aHfcvXzVINbFbyIwla/FMoEddtGqVaG9 AoTZxDzZRkk4JQuPtOWeXOwfhF3BQTSFuRBbuHURzkyVhNl8Hsa86xeyalMymzqdcbSYKBuB3g+ 12SX0db02yr7eLebsMfBu7PamKhoCVjrGstlYVoFMCbcZTBzFVnCbIHQYmIyI0hf8KyUTaGxKbw DXu8/o1myOyFLOSg4EUgHDV/OIThbVttBFOOdqtI6s1RoPPKdl4sC/Ar+CeanAvtJYev6kNsHSV fnC0XIsfpC/vLq+zAHIcHXjrmbDr8WrX7XVVV260UIOSfRZxZ2Ht8Cq6z7HaXXUhdZjIj6PBaRu IvN965JX5hN83cyTVvvkhU1XE5gU9bfCM8vJL2wg38eGkYeD3dvYb9ZMorOMiaXp3pxoPSxZhwD yEqOqcZZclxe9rMFKiry7qlIMyR0VXHi4pTWeR/scKwmMtwgslVeukSTDjLVLPqTI1HazahW185 TS1zcvNTf8Zep3w== 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 value 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 | 28 +++++++++++++++++++++++++++- 1 file changed, 27 insertions(+), 1 deletion(-) diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c index 008de9675ea98fa8c18628b2f1c3aee7f3ebc9c6..6cbc8eabb8e56c847fc34fa8ec9= 994e8b275b0af 100644 --- a/net/core/net_namespace.c +++ b/net/core/net_namespace.c @@ -763,12 +763,38 @@ 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-%u-refcnt", net->ns.= inum); + ref_tracker_dir_symlink(&net->notrefcnt_tracker, "netns-%u-notrefcnt", ne= t->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