The patch delete no umount eject flash disk freebsd panic

Oliver Fromme olli at lurza.secnetix.de
Thu Feb 22 15:40:00 UTC 2007


Recently I had an idea to solve (or work around) the problem
in a completely different way, using FUSE.

With FUSE it would be possible (and quite simple, in fact)
to implement an msdosfs-like file system as a userland
daemon.  The daemon could be started during boot and run
until shutdown, i.e. the mount would exist all the time.
You could insert and remove USB sticks, compact flash cards
and other removable FAT media at will, without having to
mount or umount.  If you remove the device, the files would
simply disappear from the mountpoint.  Any files still open
by processes would have to return some sensible error code
(maybe EBADF or ESTALE).

The actual code for the daemon could be borrowed from the
kernel's msdosfs, or from mtools (ports/emulators/mtools).

Unfortunately I don't have sufficient time right now for
doing it myself.  But if someone picks up that idea and
implements it, it would be quite useful.  Using FUSE isn't
difficult, bascially you have to link against the library
and implement handlers for a number of file system related
functions (lookup, read, write etc.).  Since it runs
entirely in userland, there's no danger of kernel panics,
and debugging is quite simple.

Maybe something for the FreeBSD ideas web page ...?

Best regards
   Oliver

-- 
Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing b. M.
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