Re: D-BUS, anyone?

[Ivan Voras <ivoras@xxxxxx>]

> The response I got on the FreeBSD lists at that time was it would
> involve major rearchitecting of something else (not VFS) since the
> kernel assumes that a device, once detected, will always be there and
> will not be abruptly yanked out...

From what I know about GEOM (the storage device handling layer which I 
would very like to see everywhere, *BSD or not :) ), disklike-device 
plugging and unplugging (actually "appearing and disappearing") is 
handled as a normal-and-expected event but the upper layers (e.g. the 
filesystem) don't propagate the handling.

At this time, it seems that the remaining assumption is that "a 
filesystem, once mounted, will remain so until root executes umount or 
the power fails". And IIRC the problems are also there with readonly- or 
sync- mounted filesystems so it's not only about uncommitted buffers.

I just checked: on a 5-stable box, unplugging a sync-mounted usb drive 
leaves the (msdosfs) filesystem apparently mounted, as shown by the 
'mount', 'df' and similar commands. 6-stable should be the same.

Linux and Windows have solved these problems a long time ago (several 
years).