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 84EA1C4332F for ; Mon, 12 Dec 2022 10:45:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232230AbiLLKps (ORCPT ); Mon, 12 Dec 2022 05:45:48 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33580 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231931AbiLLKlj (ORCPT ); Mon, 12 Dec 2022 05:41:39 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9991A101FD; Mon, 12 Dec 2022 02:37:11 -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 35AED60F97; Mon, 12 Dec 2022 10:37:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 92D01C433D2; Mon, 12 Dec 2022 10:37:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1670841430; bh=S4+UT8GkuJ4PzXxSBbT8i+fIYskK9yjtDXGzJ/x9qJc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rRSuHqb68UdOP1RoUxeTgLflTdL0ICSX4UkVgHprQ5x9k2luGgVKJY47GcpSFbIZM 4IFVb5ld3BDVOJLJ0l6e+c/BpW5hW/msXA3G4AtdtM/Nt+9qtmOsyIvLIS6/yUQCb7 OolHX10upLtJXMR9VZGsh6rtM3qWCTr6S/FftrwV7NxswCjuXP0eYxGULZJFq+iM3b 8SUkzt5AV5kUDOB7SSOaQBpaZFbcEpB24KlwIiKNB9MwLUh6MoS5PT8df8z5m5nPLf XzMEb4q/qTdYr5v7LbNe0lgFFxwG7cLfwlxjmuPNXrUpLyfGyUy0sq+zFTaFvDuLhb iKs5f2jO3fqew== 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 4.9 2/2] net: loopback: use NET_NAME_PREDICTABLE for name_assign_type Date: Mon, 12 Dec 2022 05:37:04 -0500 Message-Id: <20221212103704.300692-2-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221212103704.300692-1-sashal@kernel.org> References: <20221212103704.300692-1-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 1b65f0f975cf..f04f9a87840e 100644 --- a/drivers/net/loopback.c +++ b/drivers/net/loopback.c @@ -194,7 +194,7 @@ 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