From nobody Wed Dec 17 10:18:16 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 0FDA823F41D; Fri, 9 May 2025 15:54:42 +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=1746806083; cv=none; b=Z/aCEvFosw/K801BNla8iiFzmTJMrDaiWFqEo8ovqeJZ5snR36uxLXsognWy8Nw2xFXD+Aqzzo6btQnV5yENmfAkD9J40BPbjxRcxnF0fQyFRtGGHYOL6lYi9tXPtDwTdRgXZCgUh9jYvsurQS9M9kNL/OT/6+1Btr6ByRS8DNQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746806083; c=relaxed/simple; bh=HO4xbozyJMxD8zWDiEa6K7DNK6Y9m2+KGX7iMwR0BG8=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=X0MQDdK4xDACk3FDnBy1eA4fXeD5oGSMeKD6svLn2n1nVwAVcMmOJCidjHNtleOYL/5TJlC/vMAIC4zsMTAmfS6Ob3D2S/A5v5bW/DFSWEsICO6cqzBj/o2jbKlf2EUBO7mDoBAriBBNL6oYGUpc3PZRE673w7Oi28nC9nZ7uCU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=C9vg4ykV; 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="C9vg4ykV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B16BFC4CEEF; Fri, 9 May 2025 15:54:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746806082; bh=HO4xbozyJMxD8zWDiEa6K7DNK6Y9m2+KGX7iMwR0BG8=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=C9vg4ykVk4V/bn+FJSZiX9or5Xb2CHkrni7GKVTaFnmmp6cfh7WxTdJ0bqVaHL3ic n1h7lsP7MR2PehoFh3opW77CawZHHzUVBvbig0mmgRNv3YMOqqXjIEiAS7G/0G3dwm FR7sd4oRwzEgdvpxAeVP+1OatRz367Zl5J9duMLnULJdnyCHisNz17nDHB6rYq1Ia5 QwSNefDUKQ1n5wh4lnXifUxC6R+p6foyXga9LP3KN0/dJnd92xEqeAESNMxgTwSKUa vMDPdKLsuVR4ZvMNJzl2IeMTj6JwTo8kfSeF9jlxNCaNIExLaIHvU96ehgnSqh9LuX 0Wd8auZuoDo4g== From: Jeff Layton Date: Fri, 09 May 2025 11:53:44 -0400 Subject: [PATCH v9 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: <20250509-reftrack-dbgfs-v9-8-8ab888a4524d@kernel.org> References: <20250509-reftrack-dbgfs-v9-0-8ab888a4524d@kernel.org> In-Reply-To: <20250509-reftrack-dbgfs-v9-0-8ab888a4524d@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=HO4xbozyJMxD8zWDiEa6K7DNK6Y9m2+KGX7iMwR0BG8=; b=owEBbQKS/ZANAwAKAQAOaEEZVoIVAcsmYgBoHiUvlAQQocoaJK/ytWY/RnDG9yXvfUBn3xDsF ODOiyJTA2GJAjMEAAEKAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCaB4lLwAKCRAADmhBGVaC FaRrD/4tuPMdB9+m+eEEjmwxR0dyUaU70WNTU9byec8w0ld0DuH62XIFK2JLglAzCmQM8QtTw/z fVkO6dgPCliopqLtBVQDnsF69XJnIjQ3Rul61w3uCkCWlmhCgKzhRv39ZMbNjFHmg1/MTTyInuj 3iugHd9BjQgM2+khIARWbSYM/q2m8GUspoa1MHaeDHGRSFLT+B9eA6tT9yZU2KgfIto0ygP40TG GwHpq6Q5VVNQ6Gw+OxvmZl/Jz7rMQ6mqBWBLz9qdfxFkUDFDxKhbwX1EaAkVMQ8UWYhCHwnjBbk iDdLVTBrwq0XP51tBt6ByFCEDk3spn6pnfQ+/jb+snujC60fbQf7rF5EOFBd2GfjpyHj9thgy5A dsFGQzSzzUl3nllRVEVOGWtvk2ZvgUeEeZPaC8LUS50OBwZ1kQ1ANz8Owxyq2+TuYCa+LK53FlW BtoWwVoNTHK74Si2s0uUvgvEvQ7GumOhec+bOq5WG2m6bseRn81VczY3vqOUcSKtRiTRiEZifUe XSthEU/KxgdrbhbHsZUdauYRrVwHAWks78Gcclw6cZFxRJcKeGpxIhuKy8GfbB5dKuWMxR1Viq7 LSlv/EB2CEyQwFw5GHrws/BBtzmhAI5Lk6t2ecA3V96U04nqgYu0tLEO2Wgvylz7755rexxkawf P8qv8t6/pS/X+Ng== 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 008de9675ea98fa8c18628b2f1c3aee7f3ebc9c6..1c5e0289f0f0b37c61852d95d4e= 11a8c12a868f3 100644 --- a/net/core/net_namespace.c +++ b/net/core/net_namespace.c @@ -763,12 +763,40 @@ 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--%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 =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