Re: FS types

[Julian Reschke-FJR010 <Julian_Reschke-FJR010@email.mot.com>]

fnaumann@mail.CS.Uni-Magdeburg.De%INTERNET wrote:

> > 3. Information I would like to see in a new Dcntl opcode
> >
> > - Name of the XFS (see 1) in ASCII.
> >
> > - Type of the filesystem. This should be something like a pair
> >   of two longs, one for the generic type, one for special information.
> >   Obviously, some fs types would need to be predefined.
> >
> >   Some cases where I'd like to see this more structured information
> >   are the different flavors of FAT you already mentioned, or the
> >   different things one can find on a ISO9660 fs (long names,
> >   Rockridge extensions, Joliet extensions) etc.
> >
> > - And then probably some more ASCII fields containing a printable
> >   string which describes the filesystem (like "ISO9660/Joliet"
> >   or "VFAT32"). This would be used by tools like "df".
> >
> > - Maybe some version numbering.
> 
> Ok, defined Dcntl's are:
> 
> >     Filesystem installation (MiNT)
> >
> >  0xf0     1   FS_INSTALL          mint/file.h
> >  0xf0     2   FS_MOUNT            mint/file.h
> >  0xf0     3   FS_UNMOUNT          mint/file.h
> >  0xf0     4   FS_UNINSTALL        mint/file.h
> 
> So I mean it's logical to use:
> 
>       Filesystem information (MiNT/MagiC)
> 
>    0xf1     1   FS_NAME     (write the name of the xfs)
>    0xf1     2   FS_VERSION  (write major/minor version)
>    0xf1     3   FS_TYPE     (write major/minor type of fs on drv)
>    0xf1     4   FS_TYPE_ASC (write a human readable version of FS_TYPE)

FS_NAME should and could be kept identical to the call that exists
already
in MagiC.

The other three opcodes could be combined in one call filling a
struct. The lenght of the string returned by FS_TYPE_ASC needs to
be restricted to some sane value (24)?

> 
> and, for discussion:
> 
> FS_EJECT/FS_STOP/FS_LOCK (mapped to XHDI _for example_ (if available))
> (-> kernel can look devices with opened files)

Thid would duplicate the same fscntl codes for CDROMs. I think
we should reuse them. MagiCMac does this for floppies, for example.

Regards, jr