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Date:      Fri, 26 Feb 1999 12:22:05 -0500 (EST)
From:      Erez Zadok <ezk@cs.columbia.edu>
To:        Steve McIntyre <smcintyr@allstor-sw.co.uk>
Cc:        freebsd-fs@FreeBSD.ORG
Subject:   Re: KLD filesystems in 3.0? 
Message-ID:  <199902261722.MAA02680@shekel.mcl.cs.columbia.edu>
In-Reply-To: Your message of "Fri, 26 Feb 1999 16:58:08 GMT." <Pine.LNX.3.95.990226164739.122t-100000@virgo.software.plasmon> 

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In message <Pine.LNX.3.95.990226164739.122t-100000@virgo.software.plasmon>, Steve McIntyre writes:
[...]
> I'm having some problems trying to write a filesystem (pfs) as a KLD. I
> load the pfs module, and the startup code seems to work OK. I can mount
> the filesystem, and still all seems OK. But the first time I try to do any
> vnode ops in the FS all falls down - vn_stat tries to call pfsop_getattr
> and fails, apparently trying to call a function at 0x0b instead of the
> real address. My guess is that somehow the vnodeop entries are not being
> registered properly; I've had a look through some of the other filesystems
> and I can't see anything obvious that I'm missing.

If this is by any chance a stackable f/s, then you might find the problem
you're having by looking at my stackable template f/s (wrapfs) and several
of the examples using wrapfs.

	http://www.cs.columbia.edu/~ezk/research/software/

Erez.


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