From patchwork Mon Dec 26 14:21:42 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Pali_Roh=C3=A1r?= X-Patchwork-Id: 13081855 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 14C59C54EBD for ; Mon, 26 Dec 2022 14:23:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232140AbiLZOWu (ORCPT ); Mon, 26 Dec 2022 09:22:50 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40002 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232030AbiLZOWj (ORCPT ); Mon, 26 Dec 2022 09:22:39 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 29CBD2608; Mon, 26 Dec 2022 06:22:13 -0800 (PST) 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 dfw.source.kernel.org (Postfix) with ESMTPS id BB22A60EB5; Mon, 26 Dec 2022 14:22:12 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D3473C433D2; Mon, 26 Dec 2022 14:22:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1672064532; bh=Xsp3m3OsW4jVnQPkMQLxfCHZ/XiAut6pdb2ruAApCB4=; h=From:To:Subject:Date:In-Reply-To:References:From; b=Up4OAqH55iaCAJw883S9943eBNly3aIMlynhdSIFfKbVseamKeJfQH0MxLPkAHuPa 0RO+8XOWxMOAchvnruly8oZKaVEQHv93la8lc8DwyAqnDlp/+ol3zsBzwGycA5kTs3 PiipsjZFO53qGXeQAlkyrZ2Iet0frsmuqAA9GT26/1kj2XkqsT9ysgskuXT64p/YCW NdTkq630GuiyNhUfa+c2ohwTj+LBm3CEJKAf/qfyCBgrckS9wp2z+abpEpNKo+7RC4 qzXqOV8xr4EQF3Y0KwHx44xvTMy2W5MYRu++4b1Ux+ux6ypyB58J8MsaHiompDhxdR lLWkEteZYAALA== Received: by pali.im (Postfix) id 8C8A49D7; Mon, 26 Dec 2022 15:22:11 +0100 (CET) From: =?utf-8?q?Pali_Roh=C3=A1r?= To: linux-fsdevel@vger.kernel.org, linux-ntfs-dev@lists.sourceforge.net, linux-cifs@vger.kernel.org, jfs-discussion@lists.sourceforge.net, linux-kernel@vger.kernel.org, Alexander Viro , Jan Kara , "Theodore Y . Ts'o" , Anton Altaparmakov , OGAWA Hirofumi , Luis de Bethencourt , Salah Triki , Steve French , Paulo Alcantara , Ronnie Sahlberg , Shyam Prasad N , Tom Talpey , Dave Kleikamp , Andrew Morton , Pavel Machek , Christoph Hellwig , Kari Argillander , Viacheslav Dubeyko Subject: [RFC PATCH v2 10/18] hfs: Do not use broken utf8 NLS table for iocharset=utf8 mount option Date: Mon, 26 Dec 2022 15:21:42 +0100 Message-Id: <20221226142150.13324-11-pali@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20221226142150.13324-1-pali@kernel.org> References: <20221226142150.13324-1-pali@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org NLS table for utf8 is broken and cannot be fixed. So instead of broken utf8 nls functions char2uni() and uni2char() use functions utf8_to_utf32() and utf32_to_utf8() which implements correct encoding and decoding between Unicode code points and UTF-8 sequence. When iochatset=utf8 is used then set hsb->nls_io to NULL and use it for distinguish between the fact if NLS table or native UTF-8 functions should be used. Signed-off-by: Pali Rohár --- fs/hfs/super.c | 33 ++++++++++++++++++++++----------- fs/hfs/trans.c | 24 ++++++++++++++++++++---- 2 files changed, 42 insertions(+), 15 deletions(-) diff --git a/fs/hfs/super.c b/fs/hfs/super.c index cea19ed06bce..5a63df41da05 100644 --- a/fs/hfs/super.c +++ b/fs/hfs/super.c @@ -149,10 +149,13 @@ static int hfs_show_options(struct seq_file *seq, struct dentry *root) seq_printf(seq, ",part=%u", sbi->part); if (sbi->session >= 0) seq_printf(seq, ",session=%u", sbi->session); - if (sbi->nls_disk) + if (sbi->nls_disk) { seq_printf(seq, ",codepage=%s", sbi->nls_disk->charset); - if (sbi->nls_io) - seq_printf(seq, ",iocharset=%s", sbi->nls_io->charset); + if (sbi->nls_io) + seq_printf(seq, ",iocharset=%s", sbi->nls_io->charset); + else + seq_puts(seq, ",iocharset=utf8"); + } if (sbi->s_quiet) seq_printf(seq, ",quiet"); return 0; @@ -225,6 +228,7 @@ static int parse_options(char *options, struct hfs_sb_info *hsb) char *p; substring_t args[MAX_OPT_ARGS]; int tmp, token; + bool have_iocharset; /* initialize the sb with defaults */ hsb->s_uid = current_uid(); @@ -239,6 +243,8 @@ static int parse_options(char *options, struct hfs_sb_info *hsb) if (!options) return 1; + have_iocharset = false; + while ((p = strsep(&options, ",")) != NULL) { if (!*p) continue; @@ -332,18 +338,22 @@ static int parse_options(char *options, struct hfs_sb_info *hsb) kfree(p); break; case opt_iocharset: - if (hsb->nls_io) { + if (have_iocharset) { pr_err("unable to change iocharset\n"); return 0; } p = match_strdup(&args[0]); - if (p) - hsb->nls_io = load_nls(p); - if (!hsb->nls_io) { - pr_err("unable to load iocharset \"%s\"\n", p); - kfree(p); + if (!p) return 0; + if (strcmp(p, "utf8") != 0) { + hsb->nls_io = load_nls(p); + if (!hsb->nls_io) { + pr_err("unable to load iocharset \"%s\"\n", p); + kfree(p); + return 0; + } } + have_iocharset = true; kfree(p); break; default: @@ -351,7 +361,7 @@ static int parse_options(char *options, struct hfs_sb_info *hsb) } } - if (hsb->nls_io && !hsb->nls_disk) { + if (have_iocharset && !hsb->nls_disk) { /* * Previous version of hfs driver did something unexpected: * When codepage was not defined but iocharset was then @@ -382,7 +392,8 @@ static int parse_options(char *options, struct hfs_sb_info *hsb) return 0; } } - if (hsb->nls_disk && !hsb->nls_io) { + if (hsb->nls_disk && + !have_iocharset && strcmp(CONFIG_NLS_DEFAULT, "utf8") != 0) { hsb->nls_io = load_nls_default(); if (!hsb->nls_io) { pr_err("unable to load default iocharset\n"); diff --git a/fs/hfs/trans.c b/fs/hfs/trans.c index dbf535d52d37..01f37b395f10 100644 --- a/fs/hfs/trans.c +++ b/fs/hfs/trans.c @@ -44,7 +44,7 @@ int hfs_mac2asc(struct super_block *sb, char *out, const struct hfs_name *in) srclen = HFS_NAMELEN; dst = out; dstlen = HFS_MAX_NAMELEN; - if (nls_io) { + if (nls_disk) { wchar_t ch; while (srclen > 0) { @@ -57,7 +57,12 @@ int hfs_mac2asc(struct super_block *sb, char *out, const struct hfs_name *in) srclen -= size; if (ch == '/') ch = ':'; - size = nls_io->uni2char(ch, dst, dstlen); + if (nls_io) + size = nls_io->uni2char(ch, dst, dstlen); + else if (dstlen > 0) + size = utf32_to_utf8(ch, dst, dstlen); + else + size = -ENAMETOOLONG; if (size < 0) { if (size == -ENAMETOOLONG) goto out; @@ -101,11 +106,22 @@ void hfs_asc2mac(struct super_block *sb, struct hfs_name *out, const struct qstr srclen = in->len; dst = out->name; dstlen = HFS_NAMELEN; - if (nls_io) { + if (nls_disk) { wchar_t ch; + unicode_t u; while (srclen > 0 && dstlen > 0) { - size = nls_io->char2uni(src, srclen, &ch); + if (nls_io) + size = nls_io->char2uni(src, srclen, &ch); + else { + size = utf8_to_utf32(src, srclen, &u); + if (size >= 0) { + if (u <= MAX_WCHAR_T) + ch = u; + else + size = -EINVAL; + } + } if (size < 0) { ch = '?'; size = 1;