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authorMaciej S. Szmigiero <mail@maciej.szmigiero.name>2016-03-22 14:25:30 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-03-22 15:36:02 -0700
commit38739380683795354b3f0f1a1e80614e311b8617 (patch)
tree0b797df2422ac523740b303470049f50ce34cba9
parentf970165beeaa4803438e435d68022b3680a1a0b0 (diff)
downloadop-kernel-dev-38739380683795354b3f0f1a1e80614e311b8617.zip
op-kernel-dev-38739380683795354b3f0f1a1e80614e311b8617.tar.gz
fat: add config option to set UTF-8 mount option by default
FAT has long supported its own default file name encoding config setting, separate from CONFIG_NLS_DEFAULT. However, if UTF-8 encoded file names are desired FAT character set should not be set to utf8 since this would make file names case sensitive even if case insensitive matching is requested. Instead, "utf8" mount options should be provided to enable UTF-8 file names in FAT file system. Unfortunately, there was no possibility to set the default value of this option so on UTF-8 system "utf8" mount option had to be added manually to most FAT mounts. This patch adds config option to set such default value. Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name> Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--Documentation/filesystems/vfat.txt7
-rw-r--r--fs/fat/Kconfig18
-rw-r--r--fs/fat/inode.c4
3 files changed, 24 insertions, 5 deletions
diff --git a/Documentation/filesystems/vfat.txt b/Documentation/filesystems/vfat.txt
index 223c321..cf51360 100644
--- a/Documentation/filesystems/vfat.txt
+++ b/Documentation/filesystems/vfat.txt
@@ -56,9 +56,10 @@ iocharset=<name> -- Character set to use for converting between the
you should consider the following option instead.
utf8=<bool> -- UTF-8 is the filesystem safe version of Unicode that
- is used by the console. It can be enabled for the
- filesystem with this option. If 'uni_xlate' gets set,
- UTF-8 gets disabled.
+ is used by the console. It can be enabled or disabled
+ for the filesystem with this option.
+ If 'uni_xlate' gets set, UTF-8 gets disabled.
+ By default, FAT_DEFAULT_UTF8 setting is used.
uni_xlate=<bool> -- Translate unhandled Unicode characters to special
escaped sequences. This would let you backup and
diff --git a/fs/fat/Kconfig b/fs/fat/Kconfig
index 182f9ff..3ff1772 100644
--- a/fs/fat/Kconfig
+++ b/fs/fat/Kconfig
@@ -93,8 +93,24 @@ config FAT_DEFAULT_IOCHARSET
that most of your FAT filesystems use, and can be overridden
with the "iocharset" mount option for FAT filesystems.
Note that "utf8" is not recommended for FAT filesystems.
- If unsure, you shouldn't set "utf8" here.
+ If unsure, you shouldn't set "utf8" here - select the next option
+ instead if you would like to use UTF-8 encoded file names by default.
See <file:Documentation/filesystems/vfat.txt> for more information.
Enable any character sets you need in File Systems/Native Language
Support.
+
+config FAT_DEFAULT_UTF8
+ bool "Enable FAT UTF-8 option by default"
+ depends on VFAT_FS
+ default n
+ help
+ Set this if you would like to have "utf8" mount option set
+ by default when mounting FAT filesystems.
+
+ Even if you say Y here can always disable UTF-8 for
+ particular mount by adding "utf8=0" to mount options.
+
+ Say Y if you use UTF-8 encoding for file names, N otherwise.
+
+ See <file:Documentation/filesystems/vfat.txt> for more information.
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index a559905..2262810 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -1127,7 +1127,7 @@ static int parse_options(struct super_block *sb, char *options, int is_vfat,
}
opts->name_check = 'n';
opts->quiet = opts->showexec = opts->sys_immutable = opts->dotsOK = 0;
- opts->utf8 = opts->unicode_xlate = 0;
+ opts->unicode_xlate = 0;
opts->numtail = 1;
opts->usefree = opts->nocase = 0;
opts->tz_set = 0;
@@ -1135,6 +1135,8 @@ static int parse_options(struct super_block *sb, char *options, int is_vfat,
opts->errors = FAT_ERRORS_RO;
*debug = 0;
+ opts->utf8 = IS_ENABLED(CONFIG_FAT_DEFAULT_UTF8) && is_vfat;
+
if (!options)
goto out;
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