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From: Eric Blake <ebb9@byu.net>
Subject:  Re: csih: Patch getVolInfo.c
Date: Wed, 22 Jul 2009 19:54:58 +0000 (UTC)
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Corinna Vinschen <corinna-cygwin <at> cygwin.com> writes:

> > However, for access to the filesystem information, the READ_CONTROL
> > isn't necessary.  A desired access of 0 is sufficient in every case
> > I could lay my hands on (NTFS, NFS, Samba, FAT32, HGFS).
> > 
> along these lines, can you please test the change to mount.cc on MVFS?

Seeing as how you aren't in a position to lay your hands on MVFS, I get to be 
the bearer of bad news.

You'll have to recode this to do a retry loop, since MVFS rejects NtOpenFile 
with access of 0, giving status 0xc0000022.  The only question now is whether 
you should do the READ_CONTROL first and retry to 0, or 0 first and 
READ_CONTROL as the retry.

> It would be a pity if MVFS would be broken again due to this change,
> after having gone through all the hassle of the last days.

And of course, with 'df -T mvfs/file' now showing "unknown" instead of "mvfs", 
you can imagine what else broke.

-- 
Eric Blake




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