> Mmmm. I think it might be easier just to pull the thing apart and
> make it pass buffer_heads around, rather than allocing and copying
> data willy-nilly.
Please no. That would break the separation of FS routines and OS
adaptation, and thus break the command-line tools (which have no
buffer_heads to pass around).
Of course, if you design an interface that provides some abstraction
above buffer_heads, and which can also be implemented in user-level
code: go ahead.
As for the locking problems: I think having a meta-data lock would be
reasonable. Again, this would need an indirection so that it is no-op
in user space.
Regards,
Martin
