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udf: Fix iocharset=utf8 mount option 

Currently iocharset=utf8 mount option is broken. To use UTF-8 as iocharset,
it is required to use utf8 mount option.

Fix iocharset=utf8 mount option to use be equivalent to the utf8 mount
option.

If UTF-8 as iocharset is used then s_nls_map is set to NULL. So simplify
code around, remove UDF_FLAG_NLS_MAP and UDF_FLAG_UTF8 flags as to
distinguish between UTF-8 and non-UTF-8 it is needed just to check if
s_nls_map set to NULL or not.

Link: https://lore.kernel.org/r/20210808162453.1653-4-pali@kernel.org
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Pali Rohár 2021-08-08 18:24:36 +02:00 committed by Jan Kara
parent 979a6e28dd
commit b645333443
3 changed files with 21 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

50
fs/udf/super.c
View File

@ -343,10 +343,10 @@ static int udf_show_options(struct seq_file *seq, struct dentry *root)
seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
if (sbi->s_anchor != 0)
seq_printf(seq, ",anchor=%u", sbi->s_anchor);
if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
seq_puts(seq, ",utf8");
if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
if (sbi->s_nls_map)
seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
else
seq_puts(seq, ",iocharset=utf8");
return 0;
}
@ -552,19 +552,24 @@ static int udf_parse_options(char *options, struct udf_options *uopt,
/* Ignored (never implemented properly) */
break;
case Opt_utf8:
uopt->flags |= (1 << UDF_FLAG_UTF8);
if (!remount) {
unload_nls(uopt->nls_map);
uopt->nls_map = NULL;
}
break;
case Opt_iocharset:
if (!remount) {
if (uopt->nls_map)
unload_nls(uopt->nls_map);
/*
* load_nls() failure is handled later in
* udf_fill_super() after all options are
* parsed.
*/
unload_nls(uopt->nls_map);
uopt->nls_map = NULL;
}
/* When nls_map is not loaded then UTF-8 is used */
if (!remount && strcmp(args[0].from, "utf8") != 0) {
uopt->nls_map = load_nls(args[0].from);
uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
if (!uopt->nls_map) {
pr_err("iocharset %s not found\n",
args[0].from);
return 0;
}
}
break;
case Opt_uforget:
@ -2146,21 +2151,6 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
if (!udf_parse_options((char *)options, &uopt, false))
goto parse_options_failure;
if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
udf_err(sb, "utf8 cannot be combined with iocharset\n");
goto parse_options_failure;
}
if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
uopt.nls_map = load_nls_default();
if (!uopt.nls_map)
uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
else
udf_debug("Using default NLS map\n");
}
if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
uopt.flags |= (1 << UDF_FLAG_UTF8);
fileset.logicalBlockNum = 0xFFFFFFFF;
fileset.partitionReferenceNum = 0xFFFF;
@ -2315,8 +2305,7 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
error_out:
iput(sbi->s_vat_inode);
parse_options_failure:
if (uopt.nls_map)
unload_nls(uopt.nls_map);
unload_nls(uopt.nls_map);
if (lvid_open)
udf_close_lvid(sb);
brelse(sbi->s_lvid_bh);
@ -2366,8 +2355,7 @@ static void udf_put_super(struct super_block *sb)
sbi = UDF_SB(sb);
iput(sbi->s_vat_inode);
if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
unload_nls(sbi->s_nls_map);
unload_nls(sbi->s_nls_map);
if (!sb_rdonly(sb))
udf_close_lvid(sb);
brelse(sbi->s_lvid_bh);

2
fs/udf/udf_sb.h
View File

@ -20,8 +20,6 @@
#define UDF_FLAG_UNDELETE 6
#define UDF_FLAG_UNHIDE 7
#define UDF_FLAG_VARCONV 8
#define UDF_FLAG_NLS_MAP 9
#define UDF_FLAG_UTF8 10
#define UDF_FLAG_UID_FORGET 11 /* save -1 for uid to disk */
#define UDF_FLAG_GID_FORGET 12
#define UDF_FLAG_UID_SET 13

4
fs/udf/unicode.c
View File

@ -177,7 +177,7 @@ static int udf_name_from_CS0(struct super_block *sb,
return 0;
}
if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
if (UDF_SB(sb)->s_nls_map)
conv_f = UDF_SB(sb)->s_nls_map->uni2char;
else
conv_f = NULL;
@ -285,7 +285,7 @@ static int udf_name_to_CS0(struct super_block *sb,
if (ocu_max_len <= 0)
return 0;
if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
if (UDF_SB(sb)->s_nls_map)
conv_f = UDF_SB(sb)->s_nls_map->char2uni;
else
conv_f = NULL;