fat: document additional vfat mount options

[linux-2.6-omap-h63xx.git] / Documentation / filesystems / vfat.txt

diff --git a/Documentation/filesystems/vfat.txt b/Documentation/filesystems/vfat.txt
index fcc123ffa2523d2dc3d932ddb63c240cf9052840..dc9dc73d7d381a6f070f7da6be6dfca5727c6863 100644 (file)
--- a/Documentation/filesystems/vfat.txt
+++ b/Documentation/filesystems/vfat.txt
@@ -8,6 +8,12 @@ if you want to format from within Linux.
 
 VFAT MOUNT OPTIONS
 ----------------------------------------------------------------------
+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.
 
@@ -17,11 +23,26 @@ dmask=###     -- The permission mask for the directory.
 fmask=###     -- The permission mask for files.
                  The default is the umask of current process.
 
+allow_utime=### -- This option controls the permission check of mtime/atime.
+
+                  20 - If current process is in group of file's group ID,
+                       you can change timestamp.
+                   2 - Other users can change timestamp.
+
+                 The default is set from `dmask' option. (If the directory is
+                 writable, utime(2) is also allowed. I.e. ~dmask & 022)
+
+                 Normally utime(2) checks current process is owner of
+                 the file, or it has CAP_FOWNER capability.  But FAT
+                 filesystem doesn't have uid/gid on disk, so normal
+                 check is too unflexible. With this option you can
+                 relax it.
+
 codepage=###  -- Sets the codepage number for converting to shortname
                 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
@@ -71,6 +92,8 @@ check=s|r|n   -- Case sensitivity checking setting.
                  r: relaxed, case insensitive
                  n: normal, default setting, currently case insensitive
 
+nocase        -- This was deprecated for vfat. Use shortname=win95 instead.
+
 shortname=lower|win95|winnt|mixed
              -- Shortname display/create setting.
                 lower: convert to lowercase for display,
@@ -81,6 +104,26 @@ shortname=lower|win95|winnt|mixed
                        emulate the Windows 95 rule for create.
                 Default setting is `lower'.
 
+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 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
 
 TODO