[libvirt] [Patch v0.4] iSCSI Multi-IQN (Libvirt Support)

[Sudhir_Bellad at Dell.com]

The following patch set realizes the multi-IQN concept discussed in an
earlier thread
http://www.mail-archive.com/libvir-list@redhat.com/msg16706.html

And here ..
http://www.mail-archive.com/libvir-list@redhat.com/msg17499.html

The patch realizes an XML schema like the one below and allows libvirt
to read through it to create storage pools. 
These XMLs when created using a virtualization manager realize unique VM
to storage LUN mappings through a single console and thus opening up
possibilities for the following scenarios -

* possibility of multiple IQNs for a single Guest
* option for hypervisor's initiator to use these IQNs on behalf of the
guest

Change Log from v0.3:
1) Set default tab space to 4
2) Use Case Description for Commit Log
3) Review comments from Dave Allan
	a) No initiator iqn in the xml would mean use of the default
initiator iqn name
	b) Initiator iqn provided would mean a unique session to be
created using the provided iqn name.
	c) Single iSCSI session per pool
4) Added syntax in doc/schemas/storagepool.rng

There are no new errors introduced by this patch with "make check" and
"make syntax-check" tests.

Signed-off-by: Sudhir Bellad <sudhir_bellad at dell.com>
Signed-off-by: Shyam Iyer <shyam_iyer at dell.com>


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