Re: [PATCH RFC v3 05/16] qemu: monitor: Add support for ThrottleGroup operations

From: Chun Feng Wu <wucf(a)linux.ibm.com&gt; * 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 <wucf(a)linux.ibm.com&gt; --- src/qemu/qemu_monitor.c | 34 ++++++++ src/qemu/qemu_monitor.h | 14 ++++ src/qemu/qemu_monitor_json.c | 150 +++++++++++++++++++++++++++++++++++ src/qemu/qemu_monitor_json.h | 14 ++++ 4 files changed, 212 insertions(+) diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c index 34e2ccab97..2f067ab5d6 100644 --- a/src/qemu/qemu_monitor.c +++ b/src/qemu/qemu_monitor.c @@ -2996,6 +2996,40 @@ qemuMonitorGetBlockIoThrottle(qemuMonitor *mon, } +int +qemuMonitorThrottleGroupLimits(virJSONValue *limits, + const virDomainThrottleGroupDef *group) +{ + return qemuMonitorMakeThrottleGroupLimits(limits, group); +} + + +int +qemuMonitorUpdateThrottleGroup(qemuMonitor *mon, + const char *qomid, + virDomainBlockIoTuneInfo *info) +{ + VIR_DEBUG("qomid=%s, info=%p", qomid, info); + + QEMU_CHECK_MONITOR(mon); + + return qemuMonitorJSONUpdateThrottleGroup(mon, qomid, info); +} + + +int +qemuMonitorGetThrottleGroup(qemuMonitor *mon, + const char *groupname, + virDomainBlockIoTuneInfo *reply) +{ + VIR_DEBUG("throttle-group=%s, reply=%p", groupname, reply); + + QEMU_CHECK_MONITOR(mon); + + return qemuMonitorJSONGetThrottleGroup(mon, groupname, reply); +} + + int qemuMonitorVMStatusToPausedReason(const char *status) { diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h index b78f539c85..6474ce124c 100644 --- a/src/qemu/qemu_monitor.h +++ b/src/qemu/qemu_monitor.h @@ -1062,6 +1062,20 @@ int qemuMonitorGetBlockIoThrottle(qemuMonitor *mon, const char *qdevid, virDomainBlockIoTuneInfo *reply); +int +qemuMonitorThrottleGroupLimits(virJSONValue *limits, + const virDomainThrottleGroupDef *group); + +int +qemuMonitorUpdateThrottleGroup(qemuMonitor *mon, + const char *qomid, + virDomainBlockIoTuneInfo *info); + +int +qemuMonitorGetThrottleGroup(qemuMonitor *mon, + const char *groupname, + virDomainBlockIoTuneInfo *reply); + int qemuMonitorSystemWakeup(qemuMonitor *mon); int qemuMonitorGetVersion(qemuMonitor *mon, diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c index c5e758e7f8..462b40cb6b 100644 --- a/src/qemu/qemu_monitor_json.c +++ b/src/qemu/qemu_monitor_json.c @@ -4633,6 +4633,156 @@ 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(); + + if (qemuMonitorMakeThrottleGroupLimits(limits, info)<0)

+ return -1; + + if (!(cmd = qemuMonitorJSONMakeCommand("qom-set", + "s:property", "limits", + "s:path", qomid, + "a:value", &limits, + NULL))) + return -1; + + if (qemuMonitorJSONCommand(mon, cmd, &result) < 0) + return -1; + + if (qemuMonitorJSONCheckError(cmd, result) < 0) + return -1; + + return 0; +} + + +#define GET_THROTTLE_GROUP_VALUE(FIELD, STORE) \ + if (virJSONValueObjectHasKey(ret, FIELD)) { \ + if (virJSONValueObjectGetNumberUlong(ret, FIELD, &reply->STORE) < 0) { \ + virReportError(VIR_ERR_OPERATION_UNSUPPORTED, \ + _("throttle group field '%1$s' missing in qemu's output"), \

+ #STORE); \ + return -1; \ + } \ + } + + +int +qemuMonitorJSONGetThrottleGroup(qemuMonitor *mon, + const char *gname, + virDomainBlockIoTuneInfo *reply) +{ + g_autoptr(virJSONValue) cmd = NULL; + g_autoptr(virJSONValue) result = NULL; + g_autofree char *groupCopy = NULL; + virJSONValue *ret; + + g_autofree char *path = g_strdup_printf("/objects/%s", gname);

+ if (!(cmd = qemuMonitorJSONMakeCommand("qom-get", + "s:path", path, + "s:property", "limits", + NULL))) + return -1; + + if (qemuMonitorJSONCommand(mon, cmd, &result) < 0) + return -1; + + if (qemuMonitorJSONCheckError(cmd, result) < 0) + return -1; + + if (!(ret = qemuMonitorJSONGetReply(cmd, result, VIR_JSON_TYPE_OBJECT))) + return -1; + + GET_THROTTLE_GROUP_VALUE("bps-total", total_bytes_sec); + GET_THROTTLE_GROUP_VALUE("bps-read", read_bytes_sec); + GET_THROTTLE_GROUP_VALUE("bps-write", write_bytes_sec); + GET_THROTTLE_GROUP_VALUE("iops-total", total_iops_sec); + GET_THROTTLE_GROUP_VALUE("iops-read", read_iops_sec); + GET_THROTTLE_GROUP_VALUE("iops-write", write_iops_sec); + + GET_THROTTLE_GROUP_VALUE("bps-total-max", total_bytes_sec_max); + GET_THROTTLE_GROUP_VALUE("bps-read-max", read_bytes_sec_max); + GET_THROTTLE_GROUP_VALUE("bps-write-max", write_bytes_sec_max); + GET_THROTTLE_GROUP_VALUE("iops-total-max", total_iops_sec_max); + GET_THROTTLE_GROUP_VALUE("iops-read-max", read_iops_sec_max); + GET_THROTTLE_GROUP_VALUE("iops-write-max", write_iops_sec_max); + GET_THROTTLE_GROUP_VALUE("iops-size", size_iops_sec); + + GET_THROTTLE_GROUP_VALUE("bps-total-max-length", total_bytes_sec_max_length); + GET_THROTTLE_GROUP_VALUE("bps-read-max-length", read_bytes_sec_max_length); + GET_THROTTLE_GROUP_VALUE("bps-write-max-length", write_bytes_sec_max_length); + GET_THROTTLE_GROUP_VALUE("iops-total-max-length", total_iops_sec_max_length); + GET_THROTTLE_GROUP_VALUE("iops-read-max-length", read_iops_sec_max_length); + GET_THROTTLE_GROUP_VALUE("iops-write-max-length", write_iops_sec_max_length); + + groupCopy = g_strdup(gname); + reply->group_name = g_steal_pointer(&groupCopy); + + return 0; +} +#undef GET_THROTTLE_GROUP_VALUE + + int qemuMonitorJSONSystemWakeup(qemuMonitor *mon) { g_autoptr(virJSONValue) cmd = NULL;