[libvirt] [ PATCH v4 0/4] API to invoke S3/S4 on a host and also resume from within libvirt

This patchset adds a new API to put a host to a suspended state (Suspend-to-RAM, Suspend-to-Disk or Hybrid-Suspend) and setup a timed resume to get the host back online, from within libvirt. This uses the RTC wakeup mechanism to set up a timer alarm before suspending the host, so that in-band resume is facilitated by the firing of the RTC alarm, which wakes up the host. The decision to use the RTC Wakeup mechanism to resume the host from sleep was taken in [1]. An initial API was discussed in [2]. Some design ideas for the asynchronous mechanism implementation was discussed in [3]. v4: * Applies on top of the Hybrid-Suspend patch posted in [4]. * Incorporated the review comments in [5]. v3: * Rebased to libvirt 0.9.7 * Added a check to see if alarmTime (suspend duration) is within an acceptable range. v2: * Added an init function which finds out if S3/S4 is supported by the host, upon the first request to suspend/hibernate. * Added synchronization/locking to ensure that only one suspend operation is active at a time. v1: http://www.redhat.com/archives/libvir-list/2011-September/msg00830.html v2: http://comments.gmane.org/gmane.comp.emulators.libvirt/46729 References: [1]. http://www.redhat.com/archives/libvir-list/2011-August/msg00327.html [2]. http://www.redhat.com/archives/libvir-list/2011-August/msg00248.html [3]. http://www.redhat.com/archives/libvir-list/2011-September/msg00438.html [4]. http://www.redhat.com/archives/libvir-list/2011-November/msg01407.html [5]. http://thread.gmane.org/gmane.comp.emulators.libvirt/47950 Srivatsa S. Bhat (4): Add a public API to invoke suspend/resume on the host Add the remote protocol implementation for virNodeSuspendForDuration Implement the core API to suspend/resume the host Add virsh command to initiate suspend on the host include/libvirt/libvirt.h.in | 17 +++ src/driver.h | 6 + src/libvirt.c | 61 ++++++++++ src/libvirt_private.syms | 7 + src/libvirt_public.syms | 5 + src/nodeinfo.c | 245 ++++++++++++++++++++++++++++++++++++++++++ src/nodeinfo.h | 9 ++ src/qemu/qemu_driver.c | 4 + src/remote/remote_driver.c | 1 src/remote/remote_protocol.x | 10 ++ tools/virsh.c | 64 +++++++++++ tools/virsh.pod | 7 + 12 files changed, 434 insertions(+), 2 deletions(-)