[PATCH RFC 00/10] libxl: new hotplug calling convention

[Roger Pau Monne <roger.pau@citrix.com>]

This series implements a new hoplug calling convention for libxl.

The aim of this new convention is to reduce the blackout phase of 
migration when using complex hotplug scripts, like iSCSI or other kind 
of storage backends that might have a non trivial setup time.

There are some issues that I would like to discuss, the first one is 
the fact that pdev_path field in libxl_device_disk is no longuer used 
to store a physical path, since diskspec "target" can now contain 
"random" information to connect a block device.

To solve this I would like to introduce a new field in 
libxl_device_disk called "target", that will be used to store the 
diskspec target parameter. This can later be copied to pdev_path if 
using the old hotplug calling convention.

The second issue is related to iSCSI and iscsiadm, specifically the 
way to set authentication parameters, which is done with command line 
parameters or editing files (which each distro seems to place in 
different locations). I will look into this to see if we can find a 
suitable solution.

Thanks for the comments, Roger.