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 CF9E826659E; Wed, 30 Apr 2025 15:07:11 +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=1746025631; cv=none; b=MSnVSZ3XXL7Hj1p0PjGfj9tkQxoTMBVhGQ+RwLsKj/ASLYQi32l88kwMjGs+OcUqa65cPxqSzwAoJLE5rY4sWePvkPowKniXRCoITTQKZ8airB2WeHLDHC28LV2/VTuuIRHu5fwwc9mghwXk2y4UgyWHViR9spHuYnyh55iT04s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746025631; c=relaxed/simple; bh=HxYYob4i7WkZ4QVFzXDuapuOVvHl8o21L1EhBkSyHxk=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=YF/9GECLyloC7aLP23T7NFLh4bgOZP10GUv1dfSCtpvWkMQBTmJhAYG9ozkLwEkric/3rynM1NH2KnuoIc5LsBn0DT2tosGrSaqgKjaYE+nhGD3hVdycl/EW7JoteMJz3V6fdqSol0Eg9r12omZAvuWerG9/6GCUX4PB7WgV8Yg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=c9iJvpoL; 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="c9iJvpoL" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6ABDDC4CEE7; Wed, 30 Apr 2025 15:07:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746025631; bh=HxYYob4i7WkZ4QVFzXDuapuOVvHl8o21L1EhBkSyHxk=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=c9iJvpoLxME0pedJkdJYf/mTX07Z1tRYXv2izX2mDQLS6fHRGun2hceoO/G2qCD1A s7g/3R8cvH+O4lxFY/YX8n2wYx8tZPifI8VYoOZesL/hkvlQIpQb/VL/gd1U8pQIME z9CLMyOnS3fM4cCyVJlKCrmE98U5fIEDS2ZnV5B+4YZlbewcwIA2ypb+PTx4Sr6/4r Ej3vBWOSg5FvnTOh40zwpeCrg8igtXk5xWt+qYY8dd9G3O40CUl3GOHwYGE7vH6G0z oSfiKav/kYS5Rjsy0zPF6J3yO34p60BUGe3p4sgzmJyJcOn1PcbmAgE7jtK321g75h qO6sbQdruCJ+A== From: Jeff Layton Date: Wed, 30 Apr 2025 08:06:54 -0700 Subject: [PATCH v6 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: <20250430-reftrack-dbgfs-v6-8-867c29aff03a@kernel.org> References: <20250430-reftrack-dbgfs-v6-0-867c29aff03a@kernel.org> In-Reply-To: <20250430-reftrack-dbgfs-v6-0-867c29aff03a@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/ZANAwAIAQAOaEEZVoIVAcsmYgBoEjyUuVkMoy78wN5CCpwW5xj/qphR1mAoNEtn4 Nv5KKjK06qJAjMEAAEIAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCaBI8lAAKCRAADmhBGVaC FWCzD/9Zc84uzNPo6OQ36eKyNx0rmSVtujwMSxaE3qqL/DbF8sjCwhHNv57yeK3dYr1mkvWvlvw udhBtJK0gSu2bHhYIuoDDQCSfLqX+8CdC2KsaQkGDbLg1DBtjzgN2rTN1asqBXIEfpkkU77zxup 9vmEmvrEaVhU5221dGZcPlacieR/cX+yr20I+Pc619rhUxt0yAT97BPmPZXVIUjoHe0Gq7TM6aJ 96eUQnKDBvNJZyjF/3Du3bq/uOIoqtQ15nuwtCWoinzzar/zlm+E0MPU66I5bf6is65nhVaBrPD njb57ITAKq7FMcpft0ZGTUMhyH4nF6m4UHRcebYIgQ4rx6DaiQae7SX9wIX1o8BAgDmDS2sd8ww HLIo5WQIkO6pM9jr7nMlXHLF3VbvTSg25jW7gXPwT248UPn0v+DdR8viq7z6zoyIxNywQifpUUQ OFn0Y2Id9yJhbypaioY5Pl1jk1Wfz7swqVR/lpCc9IegvZV5TbYHgNfpzpxj34FkmKJzOwYtUmj 69/vVc9T3cNLIK3o2qar/sImF8Ayi8D8EmirTw4cvT6JQRkt8Ym66v4dQ0WnJK6XKudou0PCkQE 1OAEIwo0IsqjmWWmeoHIIILTUVHwliw6gCIcvI/QECSfDmLqXoSDYrAmpkxOFUV05S0BrsYP7V0 iTRKApfY2p9eKzQ== 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..6cbc8eabb8e56c847fc34fa8ec9994e8b275b0af 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); +#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", 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