From patchwork Sat Jan 9 22:18:31 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: 12008767 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=-10.7 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 3386CC433E0 for ; Sat, 9 Jan 2021 22:19:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F237B2225E for ; Sat, 9 Jan 2021 22:19:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726240AbhAIWTX (ORCPT ); Sat, 9 Jan 2021 17:19:23 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60870 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726077AbhAIWTW (ORCPT ); Sat, 9 Jan 2021 17:19:22 -0500 Received: from mail-il1-x133.google.com (mail-il1-x133.google.com [IPv6:2607:f8b0:4864:20::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 98870C061786 for ; Sat, 9 Jan 2021 14:18:42 -0800 (PST) Received: by mail-il1-x133.google.com with SMTP id e7so14274381ile.7 for ; Sat, 09 Jan 2021 14:18:42 -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=w2VIkQnMAZODbJW9hj2GE2ROmlZThb3D6eYLKoSqBBg=; b=u2ab68iQoimV7ho7lmr8fHX+GmpFUP2GtXQXyn1D3PDshQtb7yIklfUnfCHnI5lBjg kKw95EYL9bwkISziOi5tbUlJOwd4gj6i1cK463mRgr85ribmJYIUHHBgZdARYeYdJsjX aj5t3klsX2OQfN6/HVZa7bRCJMDibYq69pICpspfsH6jzFalQ3tmGou+rLro5aIG9XOZ m7n9LMGo+/dpqAnwoLlhH/5tcPyY7b5YJCvI3AaYpCWQrQwDqui0N07koZuh09N5ANBS WEycTj8bigPGgEnz14tCO7UhOh870XQ/eZYAXB8+ddmKb1lPuUnE8igQ0xf7XBk4hss2 r6Mg== 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=w2VIkQnMAZODbJW9hj2GE2ROmlZThb3D6eYLKoSqBBg=; b=IDV9e9AxD5CGGnSPhmgC4Ut2Lzu1lXX1fCDJ2QDwlhq4iRY0RksgmO9d9csqe1ILR0 8qWE0UgyObHYpOQOXVtbnoHavAvLcVg86Eag/n4HoFwiVamx/BBpIr1iQuuGAA2FHScj cBAUcrVwFnz2PziumaWn5+bWUEY7KaC4u0e95LLdS/k0tGpDAux9ry0SZtJppfhktldR TReA7qnQwfY/HaMyIy599QpDYLct1PDlfC0VFyPzbuKBuXiXR4hQ/05UlWBcuX7UbJL/ lbgt4BxRw0SbkXa+lhQ+SpG29RVPdGiT8vO0bsvW9YHrafLAJMIT3tNyvE6Ta/40F5WW GJMQ== X-Gm-Message-State: AOAM53361hfSNJcrcXIeq3cgcHZNxf9zdo5TveRL1UPDUOFXn6QURm9W q4CFv8OgsFnyyK7+8MbwuvPAQMMwe7c= X-Google-Smtp-Source: ABdhPJy/T9PLTTp51TWSRgmCV0S37GJAI+6RJrQcQ5Y/ZPhphF6pEy560ndUoU0odidB9IKvEmAwmg== X-Received: by 2002:a05:6e02:14cc:: with SMTP id o12mr9668867ilk.133.1610230721668; Sat, 09 Jan 2021 14:18:41 -0800 (PST) Received: from willemb.nyc.corp.google.com ([2620:0:1003:312:f693:9fff:fef4:3e8a]) by smtp.gmail.com with ESMTPSA id i27sm11415849ill.45.2021.01.09.14.18.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 09 Jan 2021 14:18:40 -0800 (PST) From: Willem de Bruijn To: netdev@vger.kernel.org Cc: davem@davemloft.net, kuba@kernel.org, Willem de Bruijn Subject: [PATCH net v2 0/3] skb frag: kmap_atomic fixes Date: Sat, 9 Jan 2021 17:18:31 -0500 Message-Id: <20210109221834.3459768-1-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 changes v1->v2 - in patch 2, increase frag_off size from u16 to u32 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(-)