On Sun, 9 Jan 2011, Bjoern A. Zeeb wrote:
On Sun, 9 Jan 2011, Brandon Gooch wrote:
On Sun, Jan 9, 2011 at 9:17 AM, Subbsd <[email protected]> wrote:
Hi
is there any mechanism to find out from userland is supports the
current kernel VIMAGE or not? something like 'sysctl
kern.features.vnet=1' ?
Thanks
I've not been able to determine this either, but as it requires kernel
re-configuration, I usually just know. In my scripts, I make sure and
fail if the call to create a vnet jail fails:
sh -c 'TEST=$(sudo jail -c vnet name=test host.hostname=test path=/) ;
if [ $? = "1" ]; then echo "VIMAGE NOT AVAILABLE" ; exit 1 ; fi'
I would just go with jail -c vnet command=/usr/bin/true or something
along these liens for the pure test. Otherwise you might end up with
a running jail, that you may not want unless you test it with the
complete command line.
...or something like that.
There may be a better way, or perhaps there should be.
Or there will be if there isn't yet. I remember I added a FEATURE()
macro somehere. At least my dev machine already has it...
# sysctl -a kern.features
kern.features.compat_freebsd7: 1
kern.features.compat_freebsd6: 1
kern.features.compat_freebsd5: 1
kern.features.compat_freebsd4: 1
kern.features.vimage: 1 <<<
kern.features.posix_shm: 1
kern.features.ipsec_natt: 1
kern.features.ipsec: 1
------------------------------------------------------------------------
Author: bz
Date: Sun Jan 9 20:40:21 2011
New Revision: 217203
URL: http://svn.freebsd.org/changeset/base/217203
Log:
MfP4 CH=185246 [1]:
Add FEATURE() to announce optional VIMAGE.
MFC after: 3 days
[1] for the moment put it in vnet.c.
Modified:
head/sys/net/vnet.c
Modified: head/sys/net/vnet.c
==============================================================================
--- head/sys/net/vnet.c Sun Jan 9 17:40:04 2011 (r217202)
+++ head/sys/net/vnet.c Sun Jan 9 20:40:21 2011 (r217203)
@@ -80,6 +80,8 @@ __FBSDID("$FreeBSD$");
* stack instance.
*/
+FEATURE(vimage, "VIMAGE kernel virtualization");
+
MALLOC_DEFINE(M_VNET, "vnet", "network stack control block");
/*
------------------------------------------------------------------------
--
Bjoern A. Zeeb You have to have visions!
<ks> Going to jail sucks -- <bz> All my daemons like it!
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