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 06ACA2798F8; Tue, 27 May 2025 17:37:03 +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=1748367424; cv=none; b=kteyTQGZ8KM85WGxVy/u+VEmqp+Oz8WNzbIw7jOOJ2mvSvGG02GadbmvYoAw63rPQhshdAVCd/7ttY1CNVanX+Wgn5j2i6xReNRf/1YrNGwwEz0krqWHQ0o2a7DkueSm4tO/eDi5jUxkZstW8Z2iZQlAY1cTfvxeesj9cCmeE4Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748367424; c=relaxed/simple; bh=Z8sw1IP6GlLz+yzRKqHDFExn7bimm2pAyd30vmmjub8=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=X4OzETYPHdCQVoAaBZ+OH05/oSkaPuVq3NMoqBSqOw5OWwWXH9T5TgMqgTyGAJNg1nl67LyTnfdY9k5JXgJgrkc9jBQUbNPGVLfDre9PfwJTKVRwdAVRN5WKPnxixRwCetc+zbCTVv48IFJ1ZN8hI179d+uDMs6Pdz9vvqZIOz8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=FkaAaqZ7; 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="FkaAaqZ7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 04B8BC4CEEA; Tue, 27 May 2025 17:37:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1748367423; bh=Z8sw1IP6GlLz+yzRKqHDFExn7bimm2pAyd30vmmjub8=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=FkaAaqZ7BagJazbPRh0LxCBSusAQoW9wZkL/eBtO4GfVyZCSNWtj/Gwwmn85FBLom a9IItePrmuL3fxPNEc3lstfVjhbiNu94YfqiB50ljj0nrlQEs4iobXYArFr1bkonP7 8ml4FsOYfnMUDz+F0hv8ZJjEadGJGfw7MTIBQycLukWcmWD/rWJv5SOiP1r88cnwqu c16M+bkSK/y4mxHaVS1qdl1pbGRyHl/lJX8gja20vXSUMjiTLCoecxprIfns0yCl8Z k7bJmvk/74+AzDRdIqbmGbF49nmUBkLeVQv4J2auh8XA4LVZXK2kWWDYbpQ87yOYV3 Ox+0BJjW6v6Ag== Message-ID: <318169535afd9f11bc9f48316a95f9e0b2780f17.camel@kernel.org> Subject: Re: [PATCH v10 8/9] net: add symlinks to ref_tracker_dir for netns From: Jeff Layton To: Eric Dumazet Cc: Andrew Morton , "David S. Miller" , Jakub Kicinski , Paolo Abeni , Simon Horman , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , 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 Date: Tue, 27 May 2025 13:37:00 -0400 In-Reply-To: References: <20250527-reftrack-dbgfs-v10-0-dc55f7705691@kernel.org> <20250527-reftrack-dbgfs-v10-8-dc55f7705691@kernel.org> Autocrypt: addr=jlayton@kernel.org; prefer-encrypt=mutual; keydata=mQINBE6V0TwBEADXhJg7s8wFDwBMEvn0qyhAnzFLTOCHooMZyx7XO7dAiIhDSi7G1NPxw n8jdFUQMCR/GlpozMFlSFiZXiObE7sef9rTtM68ukUyZM4pJ9l0KjQNgDJ6Fr342Htkjxu/kFV1Wv egyjnSsFt7EGoDjdKqr1TS9syJYFjagYtvWk/UfHlW09X+jOh4vYtfX7iYSx/NfqV3W1D7EDi0PqV T2h6v8i8YqsATFPwO4nuiTmL6I40ZofxVd+9wdRI4Db8yUNA4ZSP2nqLcLtFjClYRBoJvRWvsv4lm 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6:35=E2=80=AFAM Eric Dumazet wrote: > >=20 > > On Tue, May 27, 2025 at 4:34=E2=80=AFAM Jeff Layton wrote: > > >=20 > > > 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 f= or > > > it. > > >=20 > > > init_net is registered before the ref_tracker dir is created, so add = a > > > late_initcall() to register its files and symlinks. > > >=20 > > > Signed-off-by: Jeff Layton > > > --- > > > net/core/net_namespace.c | 30 +++++++++++++++++++++++++++++- > > > 1 file changed, 29 insertions(+), 1 deletion(-) > > >=20 > > > diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c > > > index 8708eb975295ffb78de35fcf4abef7cc281f5a51..39b01af90d240df48827e= 5c3159c3e2253e0a44d 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--%lx-%u-= refcnt", > > > + net->net_cookie, net->ns.inum); > >=20 > > With proper annotations, you should be able to catch format error as in= : > >=20 > > warning: format =E2=80=98%lx=E2=80=99 expects argument of type =E2=80= =98long unsigned int=E2=80=99, > > but argument x has type =E2=80=98u64=E2=80=99 {aka =E2=80=98long long u= nsigned int=E2=80=99} > > [-Wformat=3D] >=20 > Reference: >=20 > include/linux/compiler_attributes.h:158:#define __printf(a, b) > __attribute__((__format__(printf, a, b))) I have __printf annotations on that function: #define __ostream_printf __printf(2, 3) void __ostream_printf ref_tracker_dir_symlink(struct ref_tracker_dir *d= ir, const char *fmt, ...) That warning is complaining that I'm trying to pass off a u64 as a long. I guess that means that the format needs to be=20 "netns-%llx-%u-refcnt" ? I'll fix that and send in the next version, once I sort out the i915 mess. --=20 Jeff Layton