From nobody Mon Feb 9 09:09:50 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 F033C28A1DA; Wed, 7 May 2025 13:07:08 +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=1746623229; cv=none; b=Shyj7QQJTTq1SOOobLc7cp41AG2cqWX7L9XKJtDO+ki0I/TVQ/nngwUgnpmBCNryyw3tc0HtyJ0vf+2mE2M3fSdJkjf/ImefMkI5u/PkkcKe6x9V0cewXfTW3Mljc5c/MTGLpQNtgu2j0Kz+6IqRQu+VXtaz3vVox+eGtzmY+pI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746623229; c=relaxed/simple; bh=HO4xbozyJMxD8zWDiEa6K7DNK6Y9m2+KGX7iMwR0BG8=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=X9offzhccePY/jBqlVS/23OCZ8UKBzptb93ZOoRpdwlHN1Fusr9KkOIDhoowmzv4xt69jMsooF0JDmJo3tajUD+jLcXk1/QrFg+/tEqmn0RDB3UNIWqFoxvzRIknSNXEKfOhf9EpL39ec3QBLFzjQGgWEoIVSjdU9uOY5lYJq28= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PEMOod6K; 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="PEMOod6K" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A6843C4CEE7; Wed, 7 May 2025 13:07:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746623228; bh=HO4xbozyJMxD8zWDiEa6K7DNK6Y9m2+KGX7iMwR0BG8=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=PEMOod6KU9PVRGVpZ4Gcw+iwdFO25WoEzI7sxQqIPemICVpnlzHXAGF5G5OXQGJ5u 7sjL9SbqPV11CaMXdv3pYqeYh5Xa6Jc2REDn7pfJZojwG6wdDdM3J/TgOaWVXDnewl 1ACOPKX+DxssryRPH1pJ8gEHw86F5xQ2RK1k0bnV2ZU+HDbjj/kcPDpaD2Bp2ZPGbY 60hy4oauCRNq33Un3n1Rbsn5eyGZd8VdYSFreLEJpuYKqb10/wwEdBjCJZQ6iBMdNo 8eCHJR87IiSc2MnCSXQDcvZLsV8d+FEMuaE1sRSG8OW8WahcOhUt+c5f3r4akHlVVF qPueO54ECCxSQ== From: Jeff Layton Date: Wed, 07 May 2025 09:06:33 -0400 Subject: [PATCH v8 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: <20250507-reftrack-dbgfs-v8-8-607717d3bb98@kernel.org> References: <20250507-reftrack-dbgfs-v8-0-607717d3bb98@kernel.org> In-Reply-To: <20250507-reftrack-dbgfs-v8-0-607717d3bb98@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/ZANAwAKAQAOaEEZVoIVAcsmYgBoG1rp/8dRU+okF/dK0ceL7n0cYyDdzyTteOfWs Y5VZy4bCYqJAjMEAAEKAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCaBta6QAKCRAADmhBGVaC FRSED/0fr3wOnxxiq0T8aCKbZbTIrIB3phIIAZjsA2FIm0rmml4DNHhERPpmeGqvMRqhKT9rcGc QzBsQexvHh3RHfY1C7IzeADX3AGVpI9cuDY4ySC6Xoey6VnhSuO0forj/HpHFGCU4n2DEaNObIz l3mWdcElISuwP8t+BI5G/65/UKrtCHezR8pVwcytBtIInv2OnWFZ9BVmrjwZ93hOMV6YjvNaNDZ qnviKszbmgS1FHaQFGjPXWyAJG0KvHFQzHihhg1LAtdcrUyXUEMwUTkfvbbg4MfB6T1WY9gCi+i ODDP6lnLI58v1YSOmX/6R+C428kuJ5ulDkS/Azd54lmSwhZk41HC0X9njt2Aji9fJaayjra7Uk+ qVoTneTDHbXsznzCzK906DGDw9jiHRUUDdyGU7Uchfhy1JHtuZDeZW3++hmjFQvozqiyBuQMpKK sPPDFlQsWbdQECb0cchy7n1EXf9C/kv1M1QNgBhCX68EAthP5bv0SU9tE4ZuIIMAqVZO1YuCz2W Di9rbkTxPbpyggkVRD3f8ossPp57njhBH7RvSypT3DaSKjhvTHqJ3P6rI4HeUikwWTVrGSIP5qG WwUh+dQ9iTrCvczyt16nNRiy4LhtSllmjaS6bSzMYTMiY1vq0E+35Utr0YeRUSel3Ku2rtKKNRc 2703n1OZRfuXZSw== 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