Re: [PATCH v5 05/18] qemu: monitor: Add support for ThrottleGroup operations

From: Chun Feng Wu <danielwuwy(a)163.com&gt; This change contains QMP requests for ThrottleGroup * ThrottleGroup is updated through "qemuMonitorJSONUpdateThrottleGroup" * ThrottleGroup is retrieved through "qemuMonitorJSONGetThrottleGroup" * ThrottleGroup is deleted by reusing "qemuMonitorDelObject" * ThrottleGroup is added by reusing "qemuMonitorAddObject" * "qemuMonitorMakeThrottleGroupLimits" will be used by building qemu cmd as well Signed-off-by: Chun Feng Wu <danielwuwy(a)163.com&gt; --- src/qemu/qemu_monitor.c | 34 +++++++++ src/qemu/qemu_monitor.h | 14 ++++ src/qemu/qemu_monitor_json.c | 134 +++++++++++++++++++++++++++++++++++ src/qemu/qemu_monitor_json.h | 14 ++++ 4 files changed, 196 insertions(+)

diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c index c594b33106..887ce8e7f5 100644 --- a/src/qemu/qemu_monitor_json.c +++ b/src/qemu/qemu_monitor_json.c @@ -4666,6 +4666,140 @@ int qemuMonitorJSONGetBlockIoThrottle(qemuMonitor *mon, return qemuMonitorJSONBlockIoThrottleInfo(devices, qdevid, reply); } + +int +qemuMonitorMakeThrottleGroupLimits(virJSONValue *limits, + const virDomainThrottleGroupDef *group) +{ + if (virJSONValueObjectAdd(&limits, + "P:bps-total", group->total_bytes_sec, + "P:bps-read", group->read_bytes_sec, + "P:bps-write", group->write_bytes_sec, + "P:iops-total", group->total_iops_sec, + "P:iops-read", group->read_iops_sec, + "P:iops-write", group->write_iops_sec, + "P:bps-total-max", group->total_bytes_sec_max, + "P:bps-read-max", group->read_bytes_sec_max, + "P:bps-write-max", group->write_bytes_sec_max, + "P:iops-total-max", group->total_iops_sec_max, + "P:iops-read-max", group->read_iops_sec_max, + "P:iops-write-max", group->write_iops_sec_max, + "P:iops-size", group->size_iops_sec, + /* avoid error from QEMU: "the burst length cannot be 0" for throttlelimits + * when setting max-length + */

+ "P:bps-total-max-length", group->total_bytes_sec_max_length, + "P:bps-read-max-length", group->read_bytes_sec_max_length, + "P:bps-write-max-length", group->write_bytes_sec_max_length, + "P:iops-total-max-length", group->total_iops_sec_max_length, + "P:iops-read-max-length", group->read_iops_sec_max_length, + "P:iops-write-max-length", group->write_iops_sec_max_length, + NULL) < 0) + return -1; + + return 0; +} + + +int +qemuMonitorJSONUpdateThrottleGroup(qemuMonitor *mon, + const char *qomid, + virDomainBlockIoTuneInfo *info) +{ + g_autoptr(virJSONValue) cmd = NULL; + g_autoptr(virJSONValue) result = NULL; + g_autoptr(virJSONValue) limits = virJSONValueNewObject(); + /* prefix group name with "throttle-" in QOM */ + g_autofree char *prefixed_group_name = g_strdup_printf("throttle-%s", qomid);a

+ + if (qemuMonitorMakeThrottleGroupLimits(limits, info) < 0) + return -1; + + if (!(cmd = qemuMonitorJSONMakeCommand("qom-set", + "s:property", "limits", + "s:path", prefixed_group_name, + "a:value", &limits, + NULL)))