[OpenAFS] Re: openafs does not put a [correct] value in fsinfo.f_type?

[Jeffrey Altman]

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Adam:

If you want your code to be file system, AFS client, and version
independent you really need to test the functionality and and
not the implementations.  Specifically, you must perform a test
that attempts to lock a byte range, spin off a second process attempt
to lock the same byte range, and test for the failure.  If the
failure doesn't occur, then you know you need to fall back on a locking
strategy that doesn't rely on byte range locks.

There is no guarantee that any two AFS clients are going to use the same
pioctl mechanism.  Nor can you count on the fsinfo.f_type to be anything
other than 0 for AFS because all of the existing clients have published
0.  Nor can you count on any particular AFS client to support byte range
locking.  At the moment, only the Windows client supports byte range
locking.  Work was being done for the UNIX client but it stalled when
the developer became more interested in other projects.

I would focus on completely independent tests.

Jeffrey Altman

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