From patchwork Fri Jan 8 17:11:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Willem de Bruijn X-Patchwork-Id: 12007069 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=-10.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT 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 6D1D2C433DB for ; Fri, 8 Jan 2021 17:12:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3361A23A05 for ; Fri, 8 Jan 2021 17:12:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728284AbhAHRMh (ORCPT ); Fri, 8 Jan 2021 12:12:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52002 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727714AbhAHRMg (ORCPT ); Fri, 8 Jan 2021 12:12:36 -0500 Received: from mail-qk1-x72e.google.com (mail-qk1-x72e.google.com [IPv6:2607:f8b0:4864:20::72e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B0A2AC061380 for ; Fri, 8 Jan 2021 09:11:56 -0800 (PST) Received: by mail-qk1-x72e.google.com with SMTP id z11so9038338qkj.7 for ; Fri, 08 Jan 2021 09:11:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Y2DOlNQqrTzdFsAQ91KwyDIooFneFM3ZoGyAw5nSLTM=; b=ETexeyJFvtQ640gBcXNZ0YvyHGxPAX2auqKXYW2zlsQ6UEMU9TOk29O3MuW1c1THdA BPtwcxAer9XUZDbj3GhLcuKPySI6IkFSHb/eDMcldAAT/yw3Cf0V94WSLtoMLjIIFHJz vwR8M/dtx9hrXGqzd7Y6D9yBZm4QRfNhRKAy60lD1J2PUNu8bor7zKXzTE8eKEVnUtuE rKUv7W5pzQR+uGqryQo9+A6JX1hPQ+KYvhYtqRjVMPy47bFeEbSkH6VtNFgn0PZgM5Co LUWhf4OqaYJ53vxnFFUOp6LdEHeIe92wDLsHrebQ3OEBCGZ9Zw20DsOIHcK4wKcatWN+ CNzA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Y2DOlNQqrTzdFsAQ91KwyDIooFneFM3ZoGyAw5nSLTM=; b=tTA0HY6B0Ok3EIvHhsN75iw98HVM4yolw8WnVguPmrccjxuZtvFPtuFZ5AJr1OukLz uwdPA7LHfy9eBEpgrA70ZFXNsQKOvnY+GIEXx6wJcsXf698KFuIc2hWRxxtR6pjFUYYv HqqzWSQkIDpI2SoOVzLb2aOSv0kb1ve1wlgmKVFovzp+8U+7W7g8opbfCPB5w5+cdJyW MJrw1dNfaEgrgJd/F39Zt6+I3772f7BbW5u4llHdY5poSWAWOJnLXeCYWPjLEpLI0v0D asWvEzdinMWYkDd2xlyTUAmqYx6BQrXGTli6fy8u90LySKWIbye3xDynuRb/+zE2S/+H rgLA== X-Gm-Message-State: AOAM533H1Yh162vDwjHGmZl+l4x13ZdrF7IOs0T6ZodXgit1EolelYf6 eUkJoJLmEu700GrGSXNI+gpX4NBwiP8= X-Google-Smtp-Source: ABdhPJzz9o0ZY9f8o4OFrDC7T55DxYtBdcucQp0B8O2Iriv7Kkr66BZXqwUauHE+kw2VNwIPmFVmaA== X-Received: by 2002:a05:620a:983:: with SMTP id x3mr4916024qkx.231.1610125915615; Fri, 08 Jan 2021 09:11:55 -0800 (PST) Received: from willemb.nyc.corp.google.com ([2620:0:1003:312:f693:9fff:fef4:3e8a]) by smtp.gmail.com with ESMTPSA id c2sm5081600qke.109.2021.01.08.09.11.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 08 Jan 2021 09:11:54 -0800 (PST) From: Willem de Bruijn To: netdev@vger.kernel.org Cc: davem@davemloft.net, kuba@kernel.org, Willem de Bruijn Subject: [PATCH net 0/3] skb frag: kmap_atomic fixes Date: Fri, 8 Jan 2021 12:11:49 -0500 Message-Id: <20210108171152.2961251-1-willemdebruijn.kernel@gmail.com> X-Mailer: git-send-email 2.30.0.284.gd98b1dd5eaa7-goog MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Willem de Bruijn skb frags may be backed by highmem and/or compound pages. Various code calls kmap_atomic to safely access highmem pages. But this needs additional care for compound pages. Fix a few issues: patch 1 expect kmap mappings with CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP patch 2 fixes kmap_atomic + compound page support in skb_seq_read patch 3 fixes kmap_atomic + compound page support in esp Willem de Bruijn (3): net: support kmap_local forced debugging in skb_frag_foreach net: compound page support in skb_seq_read esp: avoid unneeded kmap_atomic call include/linux/skbuff.h | 3 ++- net/core/skbuff.c | 28 +++++++++++++++++++++++----- net/ipv4/esp4.c | 7 +------ net/ipv6/esp6.c | 7 +------ 4 files changed, 27 insertions(+), 18 deletions(-)