From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 00EC1C352A1 for ; Tue, 6 Dec 2022 09:53:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235584AbiLFJxs (ORCPT ); Tue, 6 Dec 2022 04:53:48 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58038 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235425AbiLFJvz (ORCPT ); Tue, 6 Dec 2022 04:51:55 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 94977233A2; Tue, 6 Dec 2022 01:51:12 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 1B60561601; Tue, 6 Dec 2022 09:51:12 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D6134C433C1; Tue, 6 Dec 2022 09:51:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1670320271; bh=Wk80OsS7/oJplZMF+q0zueeHGjU6cyXH6SZgm+dYPO8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=A+Bi0vYSO2Z6huA9ItEGnGGDejND+dcDN5UHPQEIrLE1FnH1fvpnLB1kMXYIlnTLe 65Bcbad+ePj2T4wnNjxLl7MOkXCCDBuJxU37UiaREBq6tSHYJmvmUequPWf8lpxAfF ulm4aZcBea4msE4h7psnZZKtUQTIlE89QG9c1Q8qAmavlsQRWDjNkGHGVID+muZkVE asLmin0uG/pcnDgy67UvDOeEVrrnuh5ZYujZiH+Yiw0VLDkvSIMEMzK0U/maMYLAVL GDiv+O9B2Aqukiq9g/E3TDaIp/jE2vPJiiwWhoTxODVCQIohxNauWVUehYEmM6yRge hATnWLoTWcyDw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Rasmus Villemoes , Jacob Keller , "David S . Miller" , Sasha Levin , edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 5/5] net: loopback: use NET_NAME_PREDICTABLE for name_assign_type Date: Tue, 6 Dec 2022 04:50:55 -0500 Message-Id: <20221206095055.987728-5-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221206095055.987728-1-sashal@kernel.org> References: <20221206095055.987728-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Rasmus Villemoes [ Upstream commit 31d929de5a112ee1b977a89c57de74710894bbbf ] When the name_assign_type attribute was introduced (commit 685343fc3ba6, "net: add name_assign_type netdev attribute"), the loopback device was explicitly mentioned as one which would make use of NET_NAME_PREDICTABLE: The name_assign_type attribute gives hints where the interface name of a given net-device comes from. These values are currently defined: ... NET_NAME_PREDICTABLE: The ifname has been assigned by the kernel in a predictable way that is guaranteed to avoid reuse and always be the same for a given device. Examples include statically created devices like the loopback device [...] Switch to that so that reading /sys/class/net/lo/name_assign_type produces something sensible instead of returning -EINVAL. Signed-off-by: Rasmus Villemoes Reviewed-by: Jacob Keller Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/loopback.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c index 14545a8797a8..7788f72c262e 100644 --- a/drivers/net/loopback.c +++ b/drivers/net/loopback.c @@ -206,7 +206,7 @@ static __net_init int loopback_net_init(struct net *net) int err; err = -ENOMEM; - dev = alloc_netdev(0, "lo", NET_NAME_UNKNOWN, loopback_setup); + dev = alloc_netdev(0, "lo", NET_NAME_PREDICTABLE, loopback_setup); if (!dev) goto out; -- 2.35.1