Re: [Xen-devel] Re: hvmloader/xenbus.c: How to modify or add a k

To:	Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>
Subject:	Re: [Xen-devel] Re: hvmloader/xenbus.c: How to modify or add a key-value pair in xenstore
From:	Bei Guan <gbtju85@xxxxxxxxx>
Date:	Tue, 16 Aug 2011 23:32:47 +0800
Cc:	Xen Devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Tim Deegan <tim@xxxxxxx>
Delivery-date:	Tue, 16 Aug 2011 08:35:02 -0700
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Many thanks to all of you.

I see there are some functions in mini-os/xenbus/xenbus.c, such as xenbus_write() and xenbus_rm(). All of them seem to change the keys and values in xenstore. I have tried these functions and found that they have no effect on the keys and values in xenstore. So, do these functions can really work? What special things need I to do to make them work?

Thanks,

Bei Guan

2011/8/16 Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>

On Mon, 2011-08-15 at 16:20 +0100, Bei Guan wrote:
> Maybe the VM doesn't have the permission to write its own key in
> Xenstore.

It is quite common for keys in xenstore to be ro for the guest (only the
backend or toolstack domain can write to them).

Ian.

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Re: [Xen-devel] Re: hvmloader/xenbus.c: How to modify or add a key-value