[Xen-devel] [PATCH] Two more states for the Xenbus: Suspend/Resume

[Stefan Berger <stefanb@xxxxxxxxxx>]

The attached patch adds two more states to the xenbus state machine for
notifying the backend about suspending and resuming of a frontend.
Without these explicit states a backend driver does currently not know
whether a frontend is disappearing due to a suspend or because the
domain has been shut down/killed. The same is true for the appearing of
a front-end driver due to either creation of a domain or resumption. For
some backend drivers and hotplug scripts it is useful to know about the
actual reason, though.
I have made the necessary modifications to the block, network and TPM
device drivers. The block and network drivers ignore this additional
state.

Signed-off-by: Stefan Berger <stefanb@xxxxxxxxxx>

Attachment: xenbus-suspend.diff
Description: Text Data

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