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From: "Pali Rohár" <pali@kernel.org>
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" <viro@zeniv.linux.org.uk>,
	"Jan Kara" <jack@suse.cz>,
	"OGAWA Hirofumi" <hirofumi@mail.parknet.co.jp>,
	"Theodore Y . Ts'o" <tytso@mit.edu>,
	"Luis de Bethencourt" <luisbg@kernel.org>,
	"Salah Triki" <salah.triki@gmail.com>,
	"Andrew Morton" <akpm@linux-foundation.org>,
	"Dave Kleikamp" <shaggy@kernel.org>,
	"Anton Altaparmakov" <anton@tuxera.com>,
	"Pavel Machek" <pavel@ucw.cz>, "Marek Behún" <marek.behun@nic.cz>,
	"Christoph Hellwig" <hch@infradead.org>
Subject: [RFC PATCH 20/20] nls: Drop broken nls_utf8 module
Date: Sun,  8 Aug 2021 18:24:53 +0200	[thread overview]
Message-ID: <20210808162453.1653-21-pali@kernel.org> (raw)
In-Reply-To: <20210808162453.1653-1-pali@kernel.org>

NLS table for utf8 is broken and cannot be fixed.

Now that all filesystems are using utf8s_to_utf16s()/utf16s_to_utf8s()
functions for converting between UTF-8 and UTF-16, and functions
utf8_to_utf32()/utf32_to_utf8() for converting between UTF-8 and Unicode
code points, there is no need to have this broken utf8 NLS module in kernel
tree anymore.

There is no user of this utf8 NLS module, so completely drop it,

Signed-off-by: Pali Rohár <pali@kernel.org>
---
 fs/nls/Kconfig    |  9 -------
 fs/nls/Makefile   |  1 -
 fs/nls/nls_utf8.c | 67 -----------------------------------------------
 3 files changed, 77 deletions(-)
 delete mode 100644 fs/nls/nls_utf8.c

diff --git a/fs/nls/Kconfig b/fs/nls/Kconfig
index c7857e36adbb..8f82cf30a493 100644
--- a/fs/nls/Kconfig
+++ b/fs/nls/Kconfig
@@ -608,13 +608,4 @@ config NLS_MAC_TURKISH
 
 	  If unsure, say Y.
 
-config NLS_UTF8
-	tristate "NLS UTF-8"
-	help
-	  If you want to display filenames with native language characters
-	  from the Microsoft FAT file system family or from JOLIET CD-ROMs
-	  correctly on the screen, you need to include the appropriate
-	  input/output character sets. Say Y here for the UTF-8 encoding of
-	  the Unicode/ISO9646 universal character set.
-
 endif # NLS
diff --git a/fs/nls/Makefile b/fs/nls/Makefile
index ac54db297128..e573db7fc173 100644
--- a/fs/nls/Makefile
+++ b/fs/nls/Makefile
@@ -42,7 +42,6 @@ obj-$(CONFIG_NLS_ISO8859_14)	+= nls_iso8859-14.o
 obj-$(CONFIG_NLS_ISO8859_15)	+= nls_iso8859-15.o
 obj-$(CONFIG_NLS_KOI8_R)	+= nls_koi8-r.o
 obj-$(CONFIG_NLS_KOI8_U)	+= nls_koi8-u.o nls_koi8-ru.o
-obj-$(CONFIG_NLS_UTF8)		+= nls_utf8.o
 obj-$(CONFIG_NLS_MAC_CELTIC)    += mac-celtic.o
 obj-$(CONFIG_NLS_MAC_CENTEURO)  += mac-centeuro.o
 obj-$(CONFIG_NLS_MAC_CROATIAN)  += mac-croatian.o
diff --git a/fs/nls/nls_utf8.c b/fs/nls/nls_utf8.c
deleted file mode 100644
index afcfbc4a14db..000000000000
--- a/fs/nls/nls_utf8.c
+++ /dev/null
@@ -1,67 +0,0 @@
-/*
- * Module for handling utf8 just like any other charset.
- * By Urban Widmark 2000
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/nls.h>
-#include <linux/errno.h>
-
-static unsigned char identity[256];
-
-static int uni2char(wchar_t uni, unsigned char *out, int boundlen)
-{
-	int n;
-
-	if (boundlen <= 0)
-		return -ENAMETOOLONG;
-
-	n = utf32_to_utf8(uni, out, boundlen);
-	if (n < 0) {
-		*out = '?';
-		return -EINVAL;
-	}
-	return n;
-}
-
-static int char2uni(const unsigned char *rawstring, int boundlen, wchar_t *uni)
-{
-	int n;
-	unicode_t u;
-
-	n = utf8_to_utf32(rawstring, boundlen, &u);
-	if (n < 0 || u > MAX_WCHAR_T) {
-		*uni = 0x003f;	/* ? */
-		return -EINVAL;
-	}
-	*uni = (wchar_t) u;
-	return n;
-}
-
-static struct nls_table table = {
-	.charset	= "utf8",
-	.uni2char	= uni2char,
-	.char2uni	= char2uni,
-	.charset2lower	= identity,	/* no conversion */
-	.charset2upper	= identity,
-};
-
-static int __init init_nls_utf8(void)
-{
-	int i;
-	for (i=0; i<256; i++)
-		identity[i] = i;
-
-        return register_nls(&table);
-}
-
-static void __exit exit_nls_utf8(void)
-{
-        unregister_nls(&table);
-}
-
-module_init(init_nls_utf8)
-module_exit(exit_nls_utf8)
-MODULE_LICENSE("Dual BSD/GPL");
-- 
2.20.1


  parent reply	other threads:[~2021-08-08 16:25 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-08 16:24 [RFC PATCH 00/20] fs: Remove usage of broken nls_utf8 and drop it Pali Rohár
2021-08-08 16:24 ` [RFC PATCH 01/20] fat: Fix iocharset=utf8 mount option Pali Rohár
2021-08-15  3:42   ` OGAWA Hirofumi
2021-08-15  9:42     ` Pali Rohár
2021-08-15 11:23       ` OGAWA Hirofumi
2021-08-23  3:51   ` Kari Argillander
2021-08-08 16:24 ` [RFC PATCH 02/20] hfsplus: Add iocharset= mount option as alias for nls= Pali Rohár
2021-08-09 17:51   ` Viacheslav Dubeyko
2021-08-09 20:49   ` Kari Argillander
2021-08-09 21:25     ` Pali Rohár
2021-08-08 16:24 ` [RFC PATCH 03/20] udf: Fix iocharset=utf8 mount option Pali Rohár
2021-08-12 14:17   ` Jan Kara
2021-08-12 15:51     ` Pali Rohár
2021-08-13 13:48       ` Jan Kara
2021-08-19  8:34         ` Pali Rohár
2021-08-19 10:41           ` Jan Kara
2021-08-08 16:24 ` [RFC PATCH 04/20] isofs: joliet: " Pali Rohár
2021-08-12 14:18   ` Jan Kara
2021-08-08 16:24 ` [RFC PATCH 05/20] ntfs: Undeprecate iocharset= " Pali Rohár
2021-08-09 20:52   ` Kari Argillander
2021-08-19  1:21   ` Kari Argillander
2021-08-19  8:12     ` Pali Rohár
2021-08-19 10:23       ` Kari Argillander
2021-08-19 22:04         ` Pali Rohár
2021-08-19 23:18           ` Kari Argillander
2021-08-08 16:24 ` [RFC PATCH 06/20] ntfs: Fix error processing when load_nls() fails Pali Rohár
2021-08-08 16:24 ` [RFC PATCH 07/20] befs: Fix printing iocharset= mount option Pali Rohár
2021-08-08 16:24 ` [RFC PATCH 08/20] befs: Rename enum value Opt_charset to Opt_iocharset to match " Pali Rohár
2021-08-08 16:24 ` [RFC PATCH 09/20] befs: Fix error processing when load_nls() fails Pali Rohár
2021-08-08 16:24 ` [RFC PATCH 10/20] befs: Allow to use native UTF-8 mode Pali Rohár
2021-08-08 16:24 ` [RFC PATCH 11/20] hfs: Explicitly set hsb->nls_disk when hsb->nls_io is set Pali Rohár
2021-08-09 17:31   ` Viacheslav Dubeyko
2021-08-09 17:37     ` Matthew Wilcox
2021-08-09 17:47       ` Pali Rohár
2021-08-09 20:43         ` Steve French
2021-08-09 18:00       ` Viacheslav Dubeyko
2021-08-08 16:24 ` [RFC PATCH 12/20] hfs: Do not use broken utf8 NLS table for iocharset=utf8 mount option Pali Rohár
2021-08-09 17:49   ` Viacheslav Dubeyko
2021-08-08 16:24 ` [RFC PATCH 13/20] hfsplus: " Pali Rohár
2021-08-09 17:42   ` Viacheslav Dubeyko
2021-08-08 16:24 ` [RFC PATCH 14/20] jfs: Remove custom iso8859-1 implementation Pali Rohár
2021-08-08 16:24 ` [RFC PATCH 15/20] jfs: Fix buffer overflow in jfs_strfromUCS_le() function Pali Rohár
2021-08-08 16:24 ` [RFC PATCH 16/20] jfs: Do not use broken utf8 NLS table for iocharset=utf8 mount option Pali Rohár
2021-08-08 16:24 ` [RFC PATCH 17/20] ntfs: " Pali Rohár
2021-08-08 16:24 ` [RFC PATCH 18/20] cifs: " Pali Rohár
2021-08-08 16:24 ` [RFC PATCH 19/20] cifs: Remove usage of load_nls_default() calls Pali Rohár
2021-08-08 16:24 ` Pali Rohár [this message]
2021-09-03 21:26 ` [RFC PATCH 00/20] fs: Remove usage of broken nls_utf8 and drop it Kari Argillander
2021-09-03 21:37   ` Pali Rohár
2021-09-03 22:06     ` Kari Argillander

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