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Date:      Tue, 16 Feb 1999 16:22:48 -0500
From:      "AARON MARKS" <amarks@sarnoff.com>
To:        freebsd-hackers@freebsd.org
Subject:   Memory-Based VFS Question
Message-ID:  <36C9E1A8.40F6780B@sarnoff.com>

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I'm implementing a memory-based VFS on 3.0-19981123. I have almost all
of the VOP_* functions implemented but I ran into a slight problem with
file copies. If I copy a file from and to a dir mounted on my fs, the
kernel calls mmap to map the data in (I guess it would call vop_read if
the data was too large). My problem is that the kernel never calls my
vop_mmap (not even sure if it's supposed to) so I never get the
opportunity to copy the data from my fs to kernel space so the data in
the io vector pased to me at vop_write is invalid. Any ideas?

Thanks,
-A.

-- 
Aaron J. Marks		       Communications and Computing Systems Lab
Assoc. Member Tech Staff       Advanced Networks and Computation Group
amarks@sarnoff.com	       Sarnoff Corporation


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