[libvirt] [Patch v0.5] iSCSI Multi-IQN (Libvirt Support)

This 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 v0.4: 1) Set default tab space to 4(Hopefully this is corrected this time ;) ) 2) Review comments from Dave Allan a) Use output of "iscsiadm -m iface" to search for existing iqn names in the iface files. 3) Create new unique iface file names for user provided iqn names if the iqns are not present in the existing iface files. 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(a)dell.com&gt; Signed-off-by: Shyam Iyer <shyam_iyer(a)dell.com&gt;