From mboxrd@z Thu Jan 1 00:00:00 1970 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=-2.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no 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 9B8E6C2D0CE for ; Tue, 21 Jan 2020 11:00:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7168520882 for ; Tue, 21 Jan 2020 11:00:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="qqbRpNcL" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728797AbgAULAx (ORCPT ); Tue, 21 Jan 2020 06:00:53 -0500 Received: from mail-wr1-f65.google.com ([209.85.221.65]:45359 "EHLO mail-wr1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727255AbgAULAx (ORCPT ); Tue, 21 Jan 2020 06:00:53 -0500 Received: by mail-wr1-f65.google.com with SMTP id j42so2605192wrj.12; Tue, 21 Jan 2020 03:00:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:content-transfer-encoding:in-reply-to :user-agent; bh=1yHO78BlmD5ePF7vR6G6f3SYtNqfwsMJwSdjTduHry8=; b=qqbRpNcLc+Hp9q2HHXLmzIqC+zsFFJMfWtlb69Hk9/vjCrnU2ql5Qwq2CMgIdQUxon 46Fpn1KwV1EXe2WaOp6JJCs8E6I03QzDKCigqQe2HseeRpJk0Xhl//evdoBU//rN9uJc t8CzqxjItvYXPnf/ttUf6iO/xn7EjfiQE2skV1RD68PICHwQYe6kRaG5K2PFyiZeVCaR NXc/SvbN0uOoCuW7mwOlM9mD5XGy6dRLy9wcMKPc4PhInPTpxUb1pHHVaQ5KgDA+DCwx bUYl0NTrJQRe5RgtEadrjqtXXo6iLtkrEKxJHoHKLpr7li8CWkdNeAq29IH9E6JQ1+lt KkKw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:content-transfer-encoding :in-reply-to:user-agent; bh=1yHO78BlmD5ePF7vR6G6f3SYtNqfwsMJwSdjTduHry8=; b=XqAbCTJeMd2jDBbOZ15laDQaRNRlITrzBuroPqzulqknj1sQn9l6h9iEum9YnJ1CbO AX9wX1Hf1c99Z1TLL6pFRKzCijy71kw+qBRb+qRZOpmyfC6vXDRBrUkd2KKMuw6mt8Qg GmbWLXGhQuuBZLNdLJaHsoTZhRddCbsCveY+59H5Sze0iJoFY9Po132Y3xZ1z0z/vbuU tYcRihBdqxmUBw5s6d+wep4m/QgrAbXoAl/h7i4mipwREmUVqRrvOa1m9M3iRvKZ0Z0c t61wz44esJvBLLFU1hs13imH0SGVdqkh5lnQdq01rEe4e6SJBPkVnELppoLYBOu/4h4w UPkA== X-Gm-Message-State: APjAAAWUlr+wRRJkgifGdCj+GShwfcnbnhyqvaK5nyeFl7pxGSBwQR5o a1wCzC2BPUz1WsOzgVFIyl0= X-Google-Smtp-Source: APXvYqyHts9oIQp+L9m14UxOXzol1XEhlCbUwKMiRBQmIvCbb8SXYmjeyMR1B7fxUn3Im8JOdEh8pA== X-Received: by 2002:adf:dfc2:: with SMTP id q2mr4750352wrn.251.1579604451026; Tue, 21 Jan 2020 03:00:51 -0800 (PST) Received: from pali ([2a02:2b88:2:1::5cc6:2f]) by smtp.gmail.com with ESMTPSA id u22sm54596665wru.30.2020.01.21.03.00.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 21 Jan 2020 03:00:50 -0800 (PST) Date: Tue, 21 Jan 2020 12:00:49 +0100 From: Pali =?utf-8?B?Um9ow6Fy?= To: OGAWA Hirofumi Cc: "Theodore Y. Ts'o" , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, Namjae Jeon , Gabriel Krisman Bertazi Subject: Re: vfat: Broken case-insensitive support for UTF-8 Message-ID: <20200121110049.4upreexmv5kxwp5n@pali> References: <20200119221455.bac7dc55g56q2l4r@pali> <87sgkan57p.fsf@mail.parknet.co.jp> <20200120173215.GF15860@mit.edu> <87eevt4ga5.fsf@mail.parknet.co.jp> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <87eevt4ga5.fsf@mail.parknet.co.jp> User-Agent: NeoMutt/20180716 Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On Tuesday 21 January 2020 12:52:50 OGAWA Hirofumi wrote: > BTW, VFAT has to store the both of shortname (codepage) and longname > (UTF16), and using both names to open a file. So Windows should be using > current locale codepage to make shortname even latest Windows for VFAT. fastfat.sys stores into shortnames only 7bit characters. Which is same in all OEM codepages. Non-7bit are replaced by underline or shortened by "~N" syntax. According to source code of fastfat.sys it has some registry option to allow usage also of full 8bit OEM codepage. So default behavior seems to be safe. -- Pali Rohár pali.rohar@gmail.com