Re: [libvirt] [PATCH v4 4/4] Add virsh command to initiate suspend on the host

Add a new command 'nodesuspend' to perform a timed suspend on the host. Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat(a)linux.vnet.ibm.com&gt; --- 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;

+ 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.