linux-kernel - RE: [PATCH V4 05/10] Tools: hv: Add an example script to retrieve dhcp state

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Message-ID: <426367E2313C2449837CD2DE46E7EAF9309DFFA2@SN2PRD0310MB382.namprd03.prod.outlook.com>
Date:	Tue, 4 Sep 2012 23:39:12 +0000
From:	KY Srinivasan <kys@...rosoft.com>
To:	Greg KH <gregkh@...uxfoundation.org>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
	"olaf@...fle.de" <olaf@...fle.de>,
	"apw@...onical.com" <apw@...onical.com>,
	"ben@...adent.org.uk" <ben@...adent.org.uk>,
	"thozza@...hat.com" <thozza@...hat.com>,
	"dcbw@...hat.com" <dcbw@...hat.com>
Subject: RE: [PATCH V4 05/10] Tools: hv: Add an example script to retrieve
 dhcp state



> -----Original Message-----
> From: Greg KH [mailto:gregkh@...uxfoundation.org]
> Sent: Tuesday, September 04, 2012 6:59 PM
> To: KY Srinivasan
> Cc: linux-kernel@...r.kernel.org; devel@...uxdriverproject.org; olaf@...fle.de;
> apw@...onical.com; ben@...adent.org.uk; thozza@...hat.com;
> dcbw@...hat.com
> Subject: Re: [PATCH V4 05/10] Tools: hv: Add an example script to retrieve dhcp
> state
> 
> On Tue, Sep 04, 2012 at 02:46:37PM -0700, K. Y. Srinivasan wrote:
> > To keep the KVP daemon code free of distro specific details, we invoke an
> > external script to retrieve the DHCP state. This is an example script that
> > was used to test the KVP code. This script has to be implemented in a Distro
> > specific fashion. For instance on distros that ship with Network Manager
> enabled,
> > this script can be based on NM APIs.
> >
> > Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>
> > Reviewed-by: Haiyang Zhang <haiyangz@...rosoft.com>
> > ---
> >  tools/hv/hv_get_dhcp_info.sh |   25 +++++++++++++++++++++++++
> >  1 files changed, 25 insertions(+), 0 deletions(-)
> >  create mode 100755 tools/hv/hv_get_dhcp_info.sh
> >
> > diff --git a/tools/hv/hv_get_dhcp_info.sh b/tools/hv/hv_get_dhcp_info.sh
> > new file mode 100755
> > index 0000000..3de4587
> > --- /dev/null
> > +++ b/tools/hv/hv_get_dhcp_info.sh
> > @@ -0,0 +1,25 @@
> > +#!/bin/bash
> > +
> > +# This example script retrieves the DHCP state of a given interface.
> > +# In the interest of keeping the KVP daemon code free of distro specific
> > +# information; the kvp daemon code invokes this external script to gather
> > +# DHCP setting for the specific interface.
> > +#
> > +# Input: Name of the interface
> > +#
> > +# Output: The script prints the string "Enabled" to stdout to indicate
> > +#	that DHCP is enabled on the interface.
> 
> What happens if DHCP is not enabled on the interface?  Shouldn't that
> also return something other than "success"?

The script is expected to write "Enabled" to stdout to indicate if DHCP is enabled; if this 
is not the case, implicitly we assume DHCP is not enabled (since this is a binary state).

Regards,

K. Y 



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