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Subject[PATCH 01/21] fat: document additional vfat mount options

From: Bart Trojanowski <>

While debugging a sync mount regression on vfat I noticed that there
were mount options parsed by the driver that were not documented.

[ fix some parts]
Signed-off-by: Bart Trojanowski <>
Signed-off-by: OGAWA Hirofumi <>

Documentation/filesystems/vfat.txt | 24 ++++++++++++++++++++++--
1 file changed, 22 insertions(+), 2 deletions(-)

diff -puN Documentation/filesystems/vfat.txt~fat-doc-fixes Documentation/filesystems/vfat.txt
--- linux-2.6/Documentation/filesystems/vfat.txt~fat-doc-fixes 2008-08-24 22:47:00.000000000 +0900
+++ linux-2.6-hirofumi/Documentation/filesystems/vfat.txt 2008-08-24 22:47:00.000000000 +0900
@@ -8,6 +8,12 @@ if you want to format from within Linux.

+uid=### -- Set the owner of all files on this filesystem.
+ The default is the uid of current process.
+gid=### -- Set the group of all files on this filesystem.
+ The default is the gid of current process.
umask=### -- The permission mask (for files and directories, see umask(1)).
The default is the umask of current process.

@@ -36,7 +42,7 @@ codepage=### -- Sets the codepage numbe
characters on FAT filesystem.
By default, FAT_DEFAULT_CODEPAGE setting is used.

-iocharset=name -- Character set to use for converting between the
+iocharset=<name> -- Character set to use for converting between the
encoding is used for user visible filename and 16 bit
Unicode characters. Long filenames are stored on disk
in Unicode format, but Unix for the most part doesn't
@@ -86,6 +92,8 @@ check=s|r|n -- Case sensitivity checki
r: relaxed, case insensitive
n: normal, default setting, currently case insensitive

+nocase -- This was deprecated for vfat. Use shortname=win95 instead.
-- Shortname display/create setting.
lower: convert to lowercase for display,
@@ -99,11 +107,23 @@ shortname=lower|win95|winnt|mixed
tz=UTC -- Interpret timestamps as UTC rather than local time.
This option disables the conversion of timestamps
between local time (as used by Windows on FAT) and UTC
- (which Linux uses internally). This is particuluarly
+ (which Linux uses internally). This is particularly
useful when mounting devices (like digital cameras)
that are set to UTC in order to avoid the pitfalls of
local time.

+showexec -- If set, the execute permission bits of the file will be
+ allowed only if the extension part of the name is .EXE,
+ .COM, or .BAT. Not set by default.
+debug -- Can be set, but unused by the current implementation.
+sys_immutable -- If set, ATTR_SYS attribute on FAT is handled as
+ IMMUTABLE flag on Linux. Not set by default.
+flush -- If set, the filesystem will try to flush to disk more
+ early than normal. Not set by default.
<bool>: 0,1,yes,no,true,false


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