On 22 Jul 2009, at 13:07, Russ Allbery wrote:
Alistair Ferguson <[email protected]> writes:
There are at least four options:
1. expose all underlying states to vos examine
2. expose pre-attached to vos examine
3. convert pre-attached to on-line for vos (the current behavior)
4. convert pre-attached to off-line for vos
Option 3 is currently implemented and is the least desirable.
Our suggestion is that we implement option 1, which will require
exposing the current volume state onto the inUse field in the
FillVolInfo function in the volserver. The vos command would need
to be
modified to be aware of the new values, but unmodified vos commands
would report off-line for volumes in a state other than fully
attached.
I agree with this proposal. I think we should expose the full state.
We'll have to modify some of our vos examine parsing code, but I think
that's the direction to go anyway.
As this involves a change to the meaning of a protocol field, it
should probably be discussed over on afs3-standardization. I don't see
any problem with extending the meaning of the inUse field, but it does
have some potential for colliding with local hacks. In this case, I
think I'd support extending the meaning without requiring new RPCs.
S.
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