On Mon, Nov 28, 2011 at 05:33:29PM +0530, Srivatsa S. Bhat wrote:
> Add a new command 'nodesuspend' to perform a timed suspend on the host.
>
> Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@xxxxxxxxxxxxxxxxxx>
> ---
>
> tools/virsh.c | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
> tools/virsh.pod | 7 ++++++
> 2 files changed, 71 insertions(+), 0 deletions(-)
>
> diff --git a/tools/virsh.c b/tools/virsh.c
> index 89fb4e7..17bc44c 100644
> --- a/tools/virsh.c
> +++ b/tools/virsh.c
> @@ -5198,6 +5198,69 @@ cmdNodeMemStats(vshControl *ctl, const vshCmd *cmd)
> }
>
> /*
> + * "nodesuspend" command
> + */
> +static const vshCmdInfo info_nodesuspend[] = {
> + {"help", N_("suspend the host node for a given time duration")},
> + {"desc", N_("Suspend the host node for a given time duration "
> + "and attempt to resume thereafter.")},
> + {NULL, NULL}
> +};
> +
> +static const vshCmdOptDef opts_node_suspend[] = {
> + {"state", VSH_OT_DATA, VSH_OFLAG_REQ, N_("mem(Suspend-to-RAM), "
> + "disk(Suspend-to-Disk), hybrid(Hybrid-Suspend)")},
> + {"duration", VSH_OT_INT, VSH_OFLAG_REQ, N_("Suspend duration in seconds")},
> + {"flags", VSH_OT_INT, VSH_OFLAG_NONE, N_("Suspend flags, 0 for default")},
> + {NULL, 0, 0, NULL}
> +};
> +
> +static bool
> +cmdNodeSuspend(vshControl *ctl, const vshCmd *cmd)
> +{
> + const char *state = NULL;
> + int suspendState;
> + long long duration;
> + unsigned int flags = 0;
> +
> + if (!vshConnectionUsability(ctl, ctl->conn))
> + return false;
> +
> + if (vshCommandOptString(cmd, "state", &state) < 0)
> + return false;
> +
> + if (vshCommandOptLongLong(cmd, "duration", &duration) < 0)
> + return false;
> +
> + if (vshCommandOptUInt(cmd, "flags", &flags) < 0)
> + return false;
> +
> + if (!strcmp(state, "mem"))
> + suspendState = VIR_NODE_S3;
If we call it 'RAM' in the API, we should be consistent here and use
'ram' too. Otherwise we should make the API VIR_SUSPEND_TARGET_MEM
instead.
> + else if (!strcmp(state, "disk"))
> + suspendState = VIR_NODE_S4;
> + else if (!strcmp(state, "hybrid"))
> + suspendState = VIR_NODE_HYBRID_SUSPEND;
> + else {
> + vshError(ctl, "%s", _("Invalid state"));
> + return false;
> + }
> +
> + if (duration <= 0) {
> + vshError(ctl, "%s", _("Invalid duration"));
> + return false;
> + }
> +
> + if (virNodeSuspendForDuration(ctl->conn, suspendState, duration,
> + flags) < 0) {
> + vshError(ctl, "%s", _("The host was not suspended"));
> + return false;
> + }
> + return true;
> diff --git a/tools/virsh.pod b/tools/virsh.pod
> index db872dd..25cdfa9 100644
> --- a/tools/virsh.pod
> +++ b/tools/virsh.pod
> @@ -253,6 +253,13 @@ statistics during 1 second.
> Returns memory stats of the node.
> If I<cell> is specified, this will prints specified cell statistics only.
>
> +=item B<nodesuspend> [I<state>] [I<duration>] [I<flags>]
> +
> +Puts the node (host machine) into a system-wide sleep state such as
> +Suspend-to-RAM (S3), Suspend-to-Disk (S4) or Hybrid-Suspend and sets up
> +a Real-Time-Clock interrupt to fire (to wake up the node) after a time delay
> +specified by the 'duration' parameter.
Again, S3/S4 are x86 specific terminology we can do without here IMHO
Daniel
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