[libvirt] [ PATCH v5 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. This patch applies on top of the Hybrid-Suspend patch posted in [1]. v5: * Added MIN_TIME_REQ_FOR_SUSPEND. * Incorporated the review comments in [3]. v4: * Applies on top of the Hybrid-Suspend patch posted in [1]. * Incorporated the review comments in [2]. 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-November/msg01407.html [2]. http://thread.gmane.org/gmane.comp.emulators.libvirt/47950 [3]. http://thread.gmane.org/gmane.comp.emulators.libvirt/49054 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 | 16 ++ src/Makefile.am | 1 src/driver.h | 6 + src/libvirt.c | 65 ++++++++++ src/libvirt_private.syms | 5 + src/libvirt_public.syms | 5 + src/lxc/lxc_driver.c | 2 src/qemu/qemu_driver.c | 2 src/remote/remote_driver.c | 1 src/remote/remote_protocol.x | 10 +- src/uml/uml_driver.c | 2 src/util/virnodesuspend.c | 269 ++++++++++++++++++++++++++++++++++++++++++ src/util/virnodesuspend.h | 36 ++++++ src/xen/xen_driver.c | 2 tools/virsh.c | 64 ++++++++++ tools/virsh.pod | 7 + 16 files changed, 491 insertions(+), 2 deletions(-) create mode 100644 src/util/virnodesuspend.c create mode 100644 src/util/virnodesuspend.h