From patchwork Mon Mar 8 14:59:13 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jesper Dangaard Brouer X-Patchwork-Id: 395835 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B0CD4C433E0 for ; Mon, 8 Mar 2021 15:00:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7743D6521D for ; Mon, 8 Mar 2021 15:00:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231142AbhCHO7Y (ORCPT ); Mon, 8 Mar 2021 09:59:24 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:33829 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231148AbhCHO7W (ORCPT ); Mon, 8 Mar 2021 09:59:22 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1615215561; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=FzrZY3kdadmKkYLYKaxp0O/bmgBTVjzWf4MuqaU6rL0=; b=HPkRnq/7sAFjE9vKiFsW/Ujf4xGxN9dzLVab1o8OFSZb87Vs2DKZlbpWHtZ/2F9VCkFKhO NyoTA/+6/rzz6m7TS7wkAZz3Vl0cBWXeIjdDy2Is83iXgb1TvgIEOhNfx4BmWr4Q3lIQe3 2iStGr6wCedBRN04e8GmiLTsbZckD7Q= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-181-dJpEyGtgO0SdWN5EILSdOQ-1; Mon, 08 Mar 2021 09:59:19 -0500 X-MC-Unique: dJpEyGtgO0SdWN5EILSdOQ-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 279E919057A2; Mon, 8 Mar 2021 14:59:18 +0000 (UTC) Received: from firesoul.localdomain (unknown [10.40.208.7]) by smtp.corp.redhat.com (Postfix) with ESMTP id BEBF510016F9; Mon, 8 Mar 2021 14:59:14 +0000 (UTC) Received: from [10.1.1.1] (localhost [IPv6:::1]) by firesoul.localdomain (Postfix) with ESMTP id 79F2130736C73; Mon, 8 Mar 2021 15:59:13 +0100 (CET) Subject: [PATCH bpf V3 0/2] bpf: Updates for BPF-helper bpf_check_mtu From: Jesper Dangaard Brouer To: bpf@vger.kernel.org Cc: Jesper Dangaard Brouer , netdev@vger.kernel.org, Daniel Borkmann , Alexei Starovoitov Date: Mon, 08 Mar 2021 15:59:13 +0100 Message-ID: <161521552920.3515614.3831682841593366034.stgit@firesoul> User-Agent: StGit/0.19 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org The FIB lookup example[1] show how the IP-header field tot_len (iph->tot_len) is used as input to perform the MTU check. The recently added MTU check helper bpf_check_mtu() should also support this type of MTU check. Lets add this feature before merge window, please. This is a followup to 34b2021cc616 ("bpf: Add BPF-helper for MTU checking"). [1] samples/bpf/xdp_fwd_kern.c --- V2: Fixed spelling and added ACKs from John Jesper Dangaard Brouer (2): bpf: BPF-helper for MTU checking add length input selftests/bpf: Tests using bpf_check_mtu BPF-helper input mtu_len param include/uapi/linux/bpf.h | 16 ++- net/core/filter.c | 12 ++- tools/testing/selftests/bpf/prog_tests/check_mtu.c | 4 + tools/testing/selftests/bpf/progs/test_check_mtu.c | 92 ++++++++++++++++++++ 4 files changed, 117 insertions(+), 7 deletions(-) --