Bug 454013

hmm. I'm not sure how to fix this in a manner that pleases everyone.
We added that patch in response to bug 181963.  Without it, it displays for eg,
polish characters incorrectly.

Kernel must give users possibility to mount FS with any codepages.
In case of "bug 181963" there is enough to mount with _documented_ mount option
"utf8". That is problem may be (and must be) resolved with user space program.

But with this patch users lose possibility to choose codepage at all. Only utf8.
Many device may read fat (mp3 players, cameras, PDA, (smart)phones, etc). I
don't know how in another languages, but if this devices can read russian names
they do it in non-utf8 (on fat). Therefore if we've Linux with kernel with this
patch we can't exchange files with this device.

Well, Andrew Zabolotny say that there is _undocumented_ option "utf8=0" in mount
utility, but:
1) this is NOT DOCUMENTED
2) mouinting may be done with other user space utiluties (gnome-mount, pmount,
hal, etc).
Are we sure that this utilities have adequate "undocumented" options?

In my mine there is some solutions:
1) keep all like in vanilla kernel. Who is needed utf will use utf8 options
2) use CONFIG_FAT_DEFAULT_IOCHARSET="utf8" options in fedora precompiled kernels
3) make utf8 option by default. BUT! if kernel receives "iocharset" option other
than "utf8" it discard utf8 flag.
Approximately so:

inode.c:
...
static int parse_options (...
...
case Opt_charset:
   if (strcmp(opts->iocharset, "utf8"))
       opts->utf8 = 0;
...

---------------
P.S. I find itfun but there is some strings from inode.c:
"if (!strcmp(opts->iocharset, "utf8")) {
   printk(KERN_ERR "FAT: utf8 is not a recommended IO charset"
     " for FAT filesystems, filesystem will be case sensitive!\n");
 }"

utf8 IS NOT A RECOMMENDED for vat!!!

The same (case 3) in patch format:

--- linux-2.6.25.i386/fs/fat/inode.c.orig       2008-07-05 15:58:06.000000000 +0700
+++ linux-2.6.25.i386/fs/fat/inode.c    2008-07-05 15:58:50.000000000 +0700
@@ -1049,6 +1049,8 @@ static int parse_options(char *options,
                        if (!iocharset)
                                return -ENOMEM;
                        opts->iocharset = iocharset;
+                       if (strcmp(opts->iocharset, "utf8"))
+                              opts->utf8 = 0;
                        break;
                case Opt_shortname_lower:
                        opts->shortname = VFAT_SFN_DISPLAY_LOWER

I'm sorry. There is not ability to correct messages, therefore I've to write new
one.
The  patch linux-2.6-defaults-fat-utf8.patch must be (in my opinion):


diff -up linux-2.6.25.i386/fs/fat/inode.c.orig linux-2.6.25.i386/fs/fat/inode.c
--- linux-2.6.25.i386/fs/fat/inode.c.orig       2008-07-05 15:58:50.000000000 +0700
+++ linux-2.6.25.i386/fs/fat/inode.c    2008-07-05 16:11:04.000000000 +0700
@@ -945,7 +945,8 @@ static int parse_options(char *options,
                opts->shortname = 0;
        opts->name_check = 'n';
        opts->quiet = opts->showexec = opts->sys_immutable = opts->dotsOK =  0;
-       opts->utf8 = opts->unicode_xlate = 0;
+       opts->utf8 = 1;
+       opts->unicode_xlate = 0;
        opts->numtail = 1;
        opts->usefree = opts->nocase = 0;
        *debug = 0;
@@ -1049,8 +1050,6 @@ static int parse_options(char *options,
                        if (!iocharset)
                                return -ENOMEM;
                        opts->iocharset = iocharset;
-                       if (strcmp(opts->iocharset, "utf8"))
-                              opts->utf8 = 0;
                        break;
                case Opt_shortname_lower:
                        opts->shortname = VFAT_SFN_DISPLAY_LOWER

What is the day today. Error on error.
There must be 2 "+" instead of "-" near at end.

We should drop the fat-default-utf8 patch. Upstream developers say it's wrong too.

Default UTF-8 patch dropped in Fedora 10. We should consider dropping it in F9 when we go to kernel 2.6.27.

UTF8 patch has been dropped in the F9 2.6.27 kernels.

With kernel 2.6.26.6-79.fc9, my MP3 players are automatically mounted and I have no problem with encodings, but booting with 2.6.27.4-68.fc10 these are mounted showing '?' instead of every non-ASCII character. With this last kernel, if I mount the players manually with 'utf8' option, then all works well as before (as with the FC9 kernel). Hope that helps.

Maybe kernel or userspace programs should mount volumes considering current locale?! (in all .utf8 locales using utf8 mount option)

Reverted the change for Fedora 9, but Fedora 10 will be using the upstream default .

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