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Date: Wed, 20 May 2009 08:41:24 -0600 (MDT)
Message-Id: <20090520.084124.1715680382.imp@bsdimp.com>
Subject: Re: [Qemu-devel] block/raw-posix.c:hdev_create() on FreeBSD and in
	general
From: "M. Warner Losh" <imp@bsdimp.com>
In-Reply-To: <20090520080723.GA2957@lst.de>
References: <20090520080723.GA2957@lst.de>
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To: hch@lst.de
Cc: nolan@sigbus.net, qemu-devel@nongnu.org

In message: <20090520080723.GA2957@lst.de>
            Christoph Hellwig <hch@lst.de> writes:
: Didn't FreeBSD do away with block device nodes in the 4.x release cycle?

Yes.  Block devices are a quaint relic of the past, and aren't
needed. :)

: In that case we will never allow to create host devices on FreeBSD
: with this code.

Yes, on FreeBSD, just use the char dev.

: Also I think we should allow creating the host devices on all supported
: operating systems.  For Linux we should use block devices, for FreeBSD
: always char devices.  For the other BSDs and Solaris do we allow only
: block or also the raw char devices?  Not sure if they actually support
: O_DIRECT for block devices nodes which pretty much is a Linux-ism so
: for cache=none at least we should probably open the raw nodes..

Other BSDs still have block devices.  O_DIRECT is supported in at
least NetBSD (and FreeBSD).

Warner