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 6B4E7156E5 for ; Wed, 20 Sep 2023 12:36:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D7FDAC433C7; Wed, 20 Sep 2023 12:36:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1695213414; bh=D6HEQYWMdqDaAOdhTNzLgZfDha5D4n7/SvwA+v7+eCE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KdYBODf2r48LAu009mAVtrOAGGvZIAlTfUyFXAc6mJINQhmBCcdum/lsJ+WZ/lSoi auJuukQv6tRz/aKalRxzLsVBlHkTZ7MKJi/4JTBTztiMid2WV4SSesy9M21+elbGPg xFV+RxwVqMA4F+FFLS1nabPC3VWdrNmgYYNA4VQM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Nicolas Dichtel , Siwar Zitouni , Guillaume Nault , "David S. Miller" Subject: [PATCH 5.4 228/367] net: handle ARPHRD_PPP in dev_is_mac_header_xmit() Date: Wed, 20 Sep 2023 13:30:05 +0200 Message-ID: <20230920112904.481648778@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230920112858.471730572@linuxfoundation.org> References: <20230920112858.471730572@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Nicolas Dichtel commit a4f39c9f14a634e4cd35fcd338c239d11fcc73fc upstream. The goal is to support a bpf_redirect() from an ethernet device (ingress) to a ppp device (egress). The l2 header is added automatically by the ppp driver, thus the ethernet header should be removed. CC: stable@vger.kernel.org Fixes: 27b29f63058d ("bpf: add bpf_redirect() helper") Signed-off-by: Nicolas Dichtel Tested-by: Siwar Zitouni Reviewed-by: Guillaume Nault Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- include/linux/if_arp.h | 4 ++++ 1 file changed, 4 insertions(+) --- a/include/linux/if_arp.h +++ b/include/linux/if_arp.h @@ -52,6 +52,10 @@ static inline bool dev_is_mac_header_xmi case ARPHRD_NONE: case ARPHRD_RAWIP: case ARPHRD_PIMREG: + /* PPP adds its l2 header automatically in ppp_start_xmit(). + * This makes it look like an l3 device to __bpf_redirect() and tcf_mirred_init(). + */ + case ARPHRD_PPP: return false; default: return true;