[OpenAFS] Evaluating AFS for in house use, RFCs...

[Jeffrey Altman]

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Volker Lendecke wrote:
> On Fri, Feb 03, 2006 at 10:37:17AM -0500, Jeffrey Altman wrote:
>> Theoretically, Samba could implement those IOCTL operations and then
>> use the OpenAFS for Windows command line tools and AFS Shell Extension
>> to communicate with the Samba server.  That is in fact how Windows 3.1
> 
> Tried to implement that, doesn't work. The windows redirector does not allow
> arbitrary ioctls to pass over smb over tcp, it's only ones that it likes.

You can't use Microsoft's ioctl mechanism.  You have to define your own.
An OAFW ioctl is a special file name that is treated as a communication
between the client and the server instead of as an access path to a
file/directory.

> I'd be happy though to be proven wrong, I think installing just some user space
> utilities for administration definitely has benefits over having to install
> kernel-mode ifs drivers. If you tell me how I get the AFS ioctls across to
> Samba I might be tempted to implement the server side.... :-)

Note that OAFW does not currently have any kernel mode IFS drivers.  It
is entirely user mode.  However, using IFS instead of SMB has been shown
to improve performance 10 times.  Even over localhost, SMB is a serious
performance hit.

Jeffrey Altman



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