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Date:      Wed, 11 Oct 2023 18:45:16 +0000
From:      bugzilla-noreply@freebsd.org
To:        virtualization@FreeBSD.org
Subject:   [Bug 273557] Regression preventing bhyve from running inside a jail without IP after f74147e26999838e03a522bf59ea33bef470d356) breaks support for jailing bhyve with IPv4 and IPv6 disabled. Patch included.
Message-ID:  <bug-273557-27103-kIBwn2oH8H@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-273557-27103@https.bugs.freebsd.org/bugzilla/>
References:  <bug-273557-27103@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D273557

Mark Johnston <markj@FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |markj@FreeBSD.org

--- Comment #12 from Mark Johnston <markj@FreeBSD.org> ---
I think I agree with the proposed patch to use VMIO_SIOCSIFFLAGS.  Even if =
IP
is disabled on the jail, tap is an L2 device.  The fact that we have to use=
 an
IP socket to configure the interface is bizarre; this overloading of socket=
s is
also problematic for capsicum.

OTOH, I think we can configure IFF_UP with any kind of socket, no?  We could
use a PF_ROUTE or PF_NETLINK socket instead.  I don't think netlink itself =
buys
us anything here, ifconfig still uses socket ioctls to set interface flags.=
=20
One other reason to avoid VMIO_SIOCSIFFLAGS is that it's really just there =
for
vmnet(4) compatibility, I believe.

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