From patchwork Mon May 16 19:36:08 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 573817 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 4940DC433FE for ; Mon, 16 May 2022 19:53:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238175AbiEPTxW (ORCPT ); Mon, 16 May 2022 15:53:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55726 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346718AbiEPTvS (ORCPT ); Mon, 16 May 2022 15:51:18 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DC1FE44752; Mon, 16 May 2022 12:45:47 -0700 (PDT) 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 ams.source.kernel.org (Postfix) with ESMTPS id E1C08B8160D; Mon, 16 May 2022 19:45:45 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5591AC385AA; Mon, 16 May 2022 19:45:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1652730344; bh=PV+arKc+s/mRjbv6FKlq3ckUVySgT8PzwCJ+d6CLaBc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=S5Tb1+HQ6lh9fD2yKYQwz9H6fB8c4bBMf4xKvu22u0/U4DPhBxAB6o3OaSgg+OXOd zdHmlAV0AEfFlYUjrwfM9bc01b9oDqJyn3Fc0WrwzkwMgH8W6830I0JYZYUW6BIdkI 3PklNGNep2yCzqftmea+CfYXp02WCKtyZd2bMPTg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Vladimir Oltean , Jakub Kicinski , Sasha Levin Subject: [PATCH 5.10 08/66] net: mscc: ocelot: restrict tc-trap actions to VCAP IS2 lookup 0 Date: Mon, 16 May 2022 21:36:08 +0200 Message-Id: <20220516193619.649544236@linuxfoundation.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220516193619.400083785@linuxfoundation.org> References: <20220516193619.400083785@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Vladimir Oltean [ Upstream commit 477d2b91623e682e9a8126ea92acb8f684969cc7 ] Once the CPU port was added to the destination port mask of a packet, it can never be cleared, so even packets marked as dropped by the MASK_MODE of a VCAP IS2 filter will still reach it. This is why we need the OCELOT_POLICER_DISCARD to "kill dropped packets dead" and make software stop seeing them. We disallow policer rules from being put on any other chain than the one for the first lookup, but we don't do this for "drop" rules, although we should. This change is merely ascertaining that the rules dont't (completely) work and letting the user know. The blamed commit is the one that introduced the multi-chain architecture in ocelot. Prior to that, we should have always offloaded the filters to VCAP IS2 lookup 0, where they did work. Fixes: 1397a2eb52e2 ("net: mscc: ocelot: create TCAM skeleton from tc filter chains") Signed-off-by: Vladimir Oltean Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/ethernet/mscc/ocelot_flower.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/mscc/ocelot_flower.c b/drivers/net/ethernet/mscc/ocelot_flower.c index c4c4649b2088..b221b83ec5a6 100644 --- a/drivers/net/ethernet/mscc/ocelot_flower.c +++ b/drivers/net/ethernet/mscc/ocelot_flower.c @@ -206,9 +206,10 @@ static int ocelot_flower_parse_action(struct ocelot *ocelot, int port, filter->type = OCELOT_VCAP_FILTER_OFFLOAD; break; case FLOW_ACTION_TRAP: - if (filter->block_id != VCAP_IS2) { + if (filter->block_id != VCAP_IS2 || + filter->lookup != 0) { NL_SET_ERR_MSG_MOD(extack, - "Trap action can only be offloaded to VCAP IS2"); + "Trap action can only be offloaded to VCAP IS2 lookup 0"); return -EOPNOTSUPP; } if (filter->goto_target != -1) {