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 701AF2741B6; Mon, 5 May 2025 17:33:45 +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=1746466425; cv=none; b=TaSKY1y1w/sDGI3ikwhMPabQIzPZXukFbEONMjTRiuWmr8JDBPBqgkKnYh/7ljlVHN5pxy08Q+tMFRwAQnPUpxbZHUeu/YjFgb7S+W1+AS/jtzb+GgcN7N/+Gpn2qBb/Ca2qUCGY8DoWI6KSSl9F+cOarVO2MJqsYBhJrbayVX8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746466425; c=relaxed/simple; bh=HO4xbozyJMxD8zWDiEa6K7DNK6Y9m2+KGX7iMwR0BG8=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=H+CWM8KuRwC6XvKtlA9VY3Sp/NlNvh2Y9TrT7We8K5DsHq7XaYWfdVI1NZqhfCjDE3yiw+2wXHmIejWeY+LbV6knKsPnOvXamPlNtShrCeZ82ooBClYorIWyM/2hw5i3eLP/gInvu0mwOMVwp5jI1yfwzBIoVkUNbMMPLoappVE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=cjgKnVJP; 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="cjgKnVJP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8C5F8C4CEEF; Mon, 5 May 2025 17:33:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746466425; bh=HO4xbozyJMxD8zWDiEa6K7DNK6Y9m2+KGX7iMwR0BG8=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=cjgKnVJP0NxiQCgS6ccr3g74jbnfVKX0mTAvbsKWVRSt6PQysSLcS5butKG4L7m2F 6Oub0oiPzut5fTdG46vAY2WAuZxhIEF/Eyy6Tm/rIxD7eeVIt90PET0KsFzUDGEnQh 0WqCViVLWP7dte+LJ0o6F/grx5fSZWeQ2Nsoi9IJPpegyGs4LAaoL1CO/fdaoo1kdh TFOrUU9RdioVa24/jtOYDN5uoaOhJbE9i6frd19kFvXdgftQX2pUOnORRw6wqUWPlT ESs6fESX5/BLjC+JrXSkBCT08qccM3VCY4PNayCKnpePVEmQKAAljViFV+lUQv2Lwl o77ZJwMZW4rJQ== From: Jeff Layton Date: Mon, 05 May 2025 13:33:22 -0400 Subject: [PATCH v7 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: 7bit Message-Id: <20250505-reftrack-dbgfs-v7-8-f78c5d97bcca@kernel.org> References: <20250505-reftrack-dbgfs-v7-0-f78c5d97bcca@kernel.org> In-Reply-To: <20250505-reftrack-dbgfs-v7-0-f78c5d97bcca@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/ZANAwAIAQAOaEEZVoIVAcsmYgBoGPZmYwQ+Q/CJWoKPdkB67+whcmC/OacHNJ4dH Vy/dKshE4KJAjMEAAEIAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCaBj2ZgAKCRAADmhBGVaC FbcVD/4k7jRscq+utxi9aI9kyxYHiT6RAVH+tCM0GODchSU6e7OAYwQx0wlLnBnIqPUE+10Czg0 za/opTFwdgl/7gTqRI67Twc3TCLp7nZWoMq+/THh1vl6J7/sLLql48sGWm/QgB2mthqXJMCU0X9 EF07MMZxvwPWuNqnGDdWms5LDntZe9bpyrerkXLuxPU+p9J6wZfV0Gt4d5kAvlewV7c40k665/O kLSONvE6xtX9tgEfvoJQ37oOYKem3u2RAJ7JctRJ3/fb7J1lfdAnwsx2leGYFADFAkS4ojGzIRC bOj8wjCwGT8zfst0hH6knOW6opu1pBXv8qkQX5Xy75EZoQ7eJFrGGr3TQ+NFPc4g/gkALcOUnTg XmGvAyaX3xTm7DZ8tDs5/PXvbmSHIz73pDkxbXcE7e6vOH7MUY9PU1H0slC3ELjFV2QyA4inEUp UZRqqZ95EWbXxLJ7ibj+GsHP+Ye2rYtFTtyzXXEqfNt2HSyvgr4wtm79x4llbHHtWGXUS8fMwYE MryL3SkeSxpTqbBDzIcV87VaG+ATrGKH12Ahsr1dORSzVHVZGex8LdggYYrvf9EcVcBRKZ7eaid l+uCziEFJ1lfW3tzAxrHYxR48BqPTfht9tNTeFBPBprurPPKLbXwhLHuThpA0K1eZO0HbxT3ezp KJtA+xOhEQwc4/Q== 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..1c5e0289f0f0b37c61852d95d4e11a8c12a868f3 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); +#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 = &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