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authorOGAWA Hirofumi <hirofumi@mail.parknet.co.jp>2008-04-28 02:16:26 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-28 08:58:47 -0700
commit1ae43f826b6cb951fc5b0f9c92372a8d5b63c7f9 (patch)
treeaea00f01d74a40e026974182006e8af903b0b241 /Documentation/filesystems/vfat.txt
parente97e8de388723f9491514fa0434ddf1fd713a188 (diff)
fat: Add allow_utime option
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 as on disk info, so normal check is too unflexible. With this option you can relax it. Signed-off-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>
Diffstat (limited to 'Documentation/filesystems/vfat.txt')
-rw-r--r--Documentation/filesystems/vfat.txt15
1 files changed, 15 insertions, 0 deletions
diff --git a/Documentation/filesystems/vfat.txt b/Documentation/filesystems/vfat.txt
index fcc123ffa252..2d5e1e582e13 100644
--- a/Documentation/filesystems/vfat.txt
+++ b/Documentation/filesystems/vfat.txt
@@ -17,6 +17,21 @@ 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.