Implement the support of get block io throttle for qemu driver.
Signed-off-by: Zhi Yong Wu <wuzhy(a)linux.vnet.ibm.com>
Signed-off-by: Lei Li <lilei(a)linux.vnet.ibm.com>
---
src/qemu/qemu_driver.c | 55 ++++++++++++++++
src/qemu/qemu_monitor.c | 18 +++++
src/qemu/qemu_monitor.h | 5 ++
src/qemu/qemu_monitor_json.c | 145 ++++++++++++++++++++++++++++++++++++++++++
src/qemu/qemu_monitor_json.h | 5 ++
src/qemu/qemu_monitor_text.c | 117 ++++++++++++++++++++++++++++++++++
src/qemu/qemu_monitor_text.h | 5 ++
7 files changed, 350 insertions(+), 0 deletions(-)
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index b41a7d3..6be6301 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -10712,6 +10712,60 @@ cleanup:
return ret;
}
+static int
+qemuDomainGetBlockIoThrottle(virDomainPtr dom,
+ const char *disk,
+ virDomainBlockIoThrottleInfoPtr reply,
+ unsigned int flags)
+{
+ struct qemud_driver *driver = dom->conn->privateData;
+ virDomainObjPtr vm = NULL;
+ qemuDomainObjPrivatePtr priv;
+ char uuidstr[VIR_UUID_STRING_BUFLEN];
+ const char *device = NULL;
+ int ret = -1;
+
+ qemuDriverLock(driver);
+ virUUIDFormat(dom->uuid, uuidstr);
+ vm = virDomainFindByUUID(&driver->domains, dom->uuid);
+ if (!vm) {
+ qemuReportError(VIR_ERR_NO_DOMAIN,
+ _("no domain with matching uuid '%s'"), uuidstr);
+ goto cleanup;
+ }
+
+ if (!virDomainObjIsActive(vm)) {
+ qemuReportError(VIR_ERR_OPERATION_INVALID,
+ "%s", _("domain is not running"));
+ goto cleanup;
+ }
+ device = qemuDiskPathToAlias(vm, disk);
+
+ if (!device) {
+ goto cleanup;
+ }
+
+ if (qemuDomainObjBeginJobWithDriver(driver, vm, QEMU_JOB_MODIFY) < 0)
+ goto cleanup;
+
+ qemuDomainObjEnterMonitorWithDriver(driver, vm);
+ priv = vm->privateData;
+ ret = qemuMonitorGetBlockIoThrottle(priv->mon, device, reply, flags);
+ qemuDomainObjExitMonitorWithDriver(driver, vm);
+
+ if (qemuDomainObjEndJob(driver, vm) == 0) {
+ vm = NULL;
+ goto cleanup;
+ }
+
+cleanup:
+ VIR_FREE(device);
+ if (vm)
+ virDomainObjUnlock(vm);
+ qemuDriverUnlock(driver);
+ return ret;
+}
+
static virDriver qemuDriver = {
.no = VIR_DRV_QEMU,
.name = "QEMU",
@@ -10855,6 +10909,7 @@ static virDriver qemuDriver = {
.domainBlockJobSetSpeed = qemuDomainBlockJobSetSpeed, /* 0.9.4 */
.domainBlockPull = qemuDomainBlockPull, /* 0.9.4 */
.domainSetBlockIoThrottle = qemuDomainSetBlockIoThrottle, /* 0.9.8 */
+ .domainGetBlockIoThrottle = qemuDomainGetBlockIoThrottle, /* 0.9.8 */
};
diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index b061631..7a23fd8 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -2560,6 +2560,24 @@ int qemuMonitorSetBlockIoThrottle(qemuMonitorPtr mon,
return ret;
}
+int qemuMonitorGetBlockIoThrottle(qemuMonitorPtr mon,
+ const char *device,
+ virDomainBlockIoThrottleInfoPtr reply,
+ unsigned int flags)
+{
+ int ret;
+
+ VIR_DEBUG("mon=%p, device=%p, reply=%p, flags=%x",
+ mon, device, reply, flags);
+
+ if (mon->json) {
+ ret = qemuMonitorJSONGetBlockIoThrottle(mon, device, reply, flags);
+ } else {
+ ret = qemuMonitorTextGetBlockIoThrottle(mon, device, reply, flags);
+ }
+ return ret;
+}
+
int qemuMonitorVMStatusToPausedReason(const char *status)
{
int st;
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index 1269430..c172b2b 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -520,6 +520,11 @@ int qemuMonitorSetBlockIoThrottle(qemuMonitorPtr mon,
virDomainBlockIoThrottleInfoPtr info,
unsigned int flags);
+int qemuMonitorGetBlockIoThrottle(qemuMonitorPtr mon,
+ const char *device,
+ virDomainBlockIoThrottleInfoPtr reply,
+ unsigned int flags);
+
/**
* When running two dd process and using <> redirection, we need a
* shell that will not truncate files. These two strings serve that
diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index 2f93830..32410e3 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -3290,3 +3290,148 @@ int qemuMonitorJSONSetBlockIoThrottle(qemuMonitorPtr mon,
return ret;
}
+static int
+qemuMonitorJSONBlockIoThrottleInfo(virJSONValuePtr result,
+ const char *device,
+ virDomainBlockIoThrottleInfoPtr reply)
+{
+ virJSONValuePtr io_throttle;
+ int ret = -1;
+ int i;
+ int found = 0;
+
+ io_throttle = virJSONValueObjectGet(result, "return");
+
+ if (!io_throttle ||io_throttle->type != VIR_JSON_TYPE_ARRAY) {
+ qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _(" block_io_throttle reply was missing device list "));
+ goto cleanup;
+ }
+
+ for (i = 0; i < virJSONValueArraySize(io_throttle); i++) {
+ virJSONValuePtr temp_dev = virJSONValueArrayGet(io_throttle, i);
+ virJSONValuePtr inserted;
+ const char *current_dev;
+
+ if (!temp_dev || temp_dev->type !=VIR_JSON_TYPE_OBJECT) {
+ qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("block io throttle device entry was not in expected format"));
+ goto cleanup;
+ }
+
+ if ((current_dev = virJSONValueObjectGetString(temp_dev, "device")) == NULL) {
+ qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("block io throttle device entry was not in expected format"));
+ goto cleanup;
+ }
+
+ if(STRPREFIX(current_dev, QEMU_DRIVE_HOST_PREFIX))
+ current_dev += strlen(QEMU_DRIVE_HOST_PREFIX);
+
+ if (STREQ(current_dev, device))
+ continue;
+
+ found = 1;
+ if ((inserted = virJSONValueObjectGet(temp_dev, "inserted")) == NULL ||
+ inserted->type != VIR_JSON_TYPE_OBJECT) {
+ qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("block io throttle inserted entry was not in expected format"));
+ goto cleanup;
+ }
+
+ if (virJSONValueObjectGetNumberUlong(inserted, "bps", &reply->bps) < 0) {
+ qemuReportError(VIR_ERR_INTERNAL_ERROR,
+ _("cannot read %s"),
+ "bps");
+ goto cleanup;
+ }
+
+ if (virJSONValueObjectGetNumberUlong(inserted, "bps_rd", &reply->bps_rd) < 0) {
+ qemuReportError(VIR_ERR_INTERNAL_ERROR,
+ _("cannot read %s"),
+ "bps_rd");
+ goto cleanup;
+ }
+
+ if (virJSONValueObjectGetNumberUlong(inserted, "bps_wr", &reply->bps_wr) < 0) {
+ qemuReportError(VIR_ERR_INTERNAL_ERROR,
+ _("cannot read %s"),
+ "bps_wr");
+ goto cleanup;
+ }
+
+ if (virJSONValueObjectGetNumberUlong(inserted, "iops", &reply->iops) < 0) {
+ qemuReportError(VIR_ERR_INTERNAL_ERROR,
+ _("cannot read %s"),
+ "iops");
+ goto cleanup;
+ }
+
+ if (virJSONValueObjectGetNumberUlong(inserted, "iops_rd", &reply->iops_rd) < 0) {
+ qemuReportError(VIR_ERR_INTERNAL_ERROR,
+ _("cannot read %s"),
+ "iops_rd");
+ goto cleanup;
+ }
+
+ if (virJSONValueObjectGetNumberUlong(inserted, "iops_wr", &reply->iops_wr) < 0) {
+ qemuReportError(VIR_ERR_INTERNAL_ERROR,
+ _("cannot read %s"),
+ "iops_wr");
+ goto cleanup;
+ }
+ break;
+ }
+
+ if (!found) {
+ qemuReportError(VIR_ERR_INTERNAL_ERROR,
+ _("cannot found info for device '%s'"),
+ device);
+ goto cleanup;
+ }
+ ret = 0;
+
+cleanup:
+ return ret;
+}
+
+int qemuMonitorJSONGetBlockIoThrottle(qemuMonitorPtr mon,
+ const char *device,
+ virDomainBlockIoThrottleInfoPtr reply,
+ unsigned int flags)
+{
+ int ret = -1;
+ virJSONValuePtr cmd = NULL;
+ virJSONValuePtr result = NULL;
+
+ if (!flags) {
+ cmd = qemuMonitorJSONMakeCommand("query-block",
+ NULL);
+ }
+
+ if (!cmd) {
+ return -1;
+ }
+
+ ret = qemuMonitorJSONCommand(mon, cmd, &result);
+
+ if (ret == 0 && virJSONValueObjectHasKey(result, "error")) {
+ if (qemuMonitorJSONHasError(result, "DeviceNotActive"))
+ qemuReportError(VIR_ERR_OPERATION_INVALID,
+ _("No active operation on device: %s"), device);
+ else if (qemuMonitorJSONHasError(result, "NotSupported"))
+ qemuReportError(VIR_ERR_OPERATION_INVALID,
+ _("Operation is not supported for device: %s"), device);
+ else
+ qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("Unexpected error"));
+ ret = -1;
+ }
+
+ if (ret == 0 && !flags)
+ ret = qemuMonitorJSONBlockIoThrottleInfo(result, device, reply);
+
+ virJSONValueFree(cmd);
+ virJSONValueFree(result);
+ return ret;
+}
diff --git a/src/qemu/qemu_monitor_json.h b/src/qemu/qemu_monitor_json.h
index 36cae79..9562908 100644
--- a/src/qemu/qemu_monitor_json.h
+++ b/src/qemu/qemu_monitor_json.h
@@ -255,4 +255,9 @@ int qemuMonitorJSONSetBlockIoThrottle(qemuMonitorPtr mon,
virDomainBlockIoThrottleInfoPtr info,
unsigned int flags);
+int qemuMonitorJSONGetBlockIoThrottle(qemuMonitorPtr mon,
+ const char *device,
+ virDomainBlockIoThrottleInfoPtr reply,
+ unsigned int flags);
+
#endif /* QEMU_MONITOR_JSON_H */
diff --git a/src/qemu/qemu_monitor_text.c b/src/qemu/qemu_monitor_text.c
index 13fdf55..496e926 100644
--- a/src/qemu/qemu_monitor_text.c
+++ b/src/qemu/qemu_monitor_text.c
@@ -3433,3 +3433,120 @@ cleanup:
return ret;
}
+static int qemuMonitorTextParseBlockIoThrottle(const char *result,
+ const char *device,
+ virDomainBlockIoThrottleInfoPtr reply)
+{
+ char *dummy = NULL;
+ int ret = -1;
+ const char *p, *eol;
+ int devnamelen = strlen(device);
+ int tmp;
+
+ p = result;
+
+ while (*p) {
+ if (STRPREFIX(p, QEMU_DRIVE_HOST_PREFIX))
+ p += strlen(QEMU_DRIVE_HOST_PREFIX);
+
+ if (STREQLEN(p, device, devnamelen) &&
+ p[devnamelen] == ':' && p[devnamelen+1] == ' ') {
+
+ eol = strchr(p, '\n');
+ if (!eol)
+ eol = p + strlen(p);
+
+ p += devnamelen + 2; /*Skip to first label. */
+
+ while (*p) {
+ if (STRPREFIX(p, "bps=")) {
+ p += strlen("bps=");
+ if (virStrToLong_ull(p, &dummy, 10, &reply->bps) == -1)
+ VIR_DEBUG("error reading bps: %s", p);
+ } else if (STRPREFIX(p, "bps_rd=")) {
+ p += strlen("bps_rd=");
+ if (virStrToLong_ull(p, &dummy, 10, &reply->bps_rd) == -1)
+ VIR_DEBUG("error reading bps_rd: %s", p);
+ } else if (STRPREFIX(p, "bps_wr=")) {
+ p += strlen("bps_wr=");
+ if (virStrToLong_ull(p, &dummy, 10, &reply->bps_wr) == -1)
+ VIR_DEBUG("error reading bps_wr: %s", p);
+ } else if (STRPREFIX(p, "iops=")) {
+ p += strlen("iops=");
+ if (virStrToLong_ull(p, &dummy, 10, &reply->iops) == -1)
+ VIR_DEBUG("error reading iops: %s", p);
+ } else if (STRPREFIX(p, "iops_rd=")) {
+ p += strlen("iops_rd=");
+ if (virStrToLong_ull(p, &dummy, 10, &reply->iops_rd) == -1)
+ VIR_DEBUG("error reading iops_rd: %s", p);
+ } else if (STRPREFIX(p, "iops_wr=")) {
+ p += strlen("iops_wr=");
+ if (virStrToLong_ull(p, &dummy, 10, &reply->iops_wr) == -1)
+ VIR_DEBUG("error reading iops_wr: %s", p);
+ } else {
+ VIR_DEBUG(" unknown block info %s", p);
+ }
+
+ /* Skip to next label. */
+ p = strchr (p, ' ');
+ if (!p || p >= eol)
+ break;
+ p++;
+ }
+ ret = 0;
+ goto cleanup;
+ }
+
+ /* Skip to next line. */
+ p = strchr (p, '\n');
+ if (!p)
+ break;
+ p++;
+ }
+
+ qemuReportError(VIR_ERR_INVALID_ARG,
+ _("no info for device '%s'"), device);
+
+cleanup:
+ return ret;
+}
+
+int qemuMonitorTextGetBlockIoThrottle(qemuMonitorPtr mon,
+ const char *device,
+ virDomainBlockIoThrottleInfoPtr reply,
+ unsigned int flags)
+{
+ char *cmd = NULL;
+ char *result = NULL;
+ int ret = 0;
+
+ if (!flags) {
+ ret = virAsprintf(&cmd, "info block");
+ }
+
+ if (ret < 0) {
+ virReportOOMError();
+ return -1;
+ }
+
+ if (qemuMonitorHMPCommand(mon, cmd, &result) < 0) {
+ qemuReportError(VIR_ERR_INTERNAL_ERROR,
+ "%s", _("cannot run monitor command"));
+ ret = -1;
+ goto cleanup;
+ }
+
+ if (strstr(result, "\ninfo ")) {
+ qemuReportError(VIR_ERR_OPERATION_INVALID,
+ "%s",
+ _("info block not supported by this qemu"));
+ ret = -1;
+ goto cleanup;
+ }
+ ret = qemuMonitorTextParseBlockIoThrottle(result, device, reply);
+
+cleanup:
+ VIR_FREE(cmd);
+ VIR_FREE(result);
+ return ret;
+}
diff --git a/src/qemu/qemu_monitor_text.h b/src/qemu/qemu_monitor_text.h
index d64fc55..ded5807 100644
--- a/src/qemu/qemu_monitor_text.h
+++ b/src/qemu/qemu_monitor_text.h
@@ -248,4 +248,9 @@ int qemuMonitorTextSetBlockIoThrottle(qemuMonitorPtr mon,
virDomainBlockIoThrottleInfoPtr info,
unsigned int flags);
+int qemuMonitorTextGetBlockIoThrottle(qemuMonitorPtr mon,
+ const char *device,
+ virDomainBlockIoThrottleInfoPtr reply,
+ unsigned int flags);
+
#endif /* QEMU_MONITOR_TEXT_H */
--
1.7.1
