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latency: Implemente internal API for qemu driver

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This commit is contained in:
Osier Yang 2011-09-05 16:22:58 +08:00
parent 2f58ba8996
commit ee0d8c3b5c
1 changed files with 189 additions and 0 deletions
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189
src/qemu/qemu_driver.c
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@ -7261,6 +7261,194 @@ cleanup:
return ret;
}
static int
qemudDomainBlockStatsFlags (virDomainPtr dom,
const char *path,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
int i, tmp, ret = -1;
virDomainObjPtr vm;
virDomainDiskDefPtr disk = NULL;
qemuDomainObjPrivatePtr priv;
long long rd_req, rd_bytes, wr_req, wr_bytes, rd_total_times;
long long wr_total_times, flush_req, flush_total_times, errs;
virCheckFlags(0, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
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;
}
if (*nparams != 0) {
for (i = 0 ; i < vm->def->ndisks ; i++) {
if (STREQ(path, vm->def->disks[i]->dst)) {
disk = vm->def->disks[i];
break;
}
}
if (!disk) {
qemuReportError(VIR_ERR_INVALID_ARG,
_("invalid path: %s"), path);
goto cleanup;
}
if (!disk->info.alias) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("missing disk device alias name for %s"), disk->dst);
goto cleanup;
}
}
priv = vm->privateData;
VIR_DEBUG("priv=%p, params=%p, flags=%x", priv, params, flags);
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
qemuDomainObjEnterMonitor(driver, vm);
tmp = *nparams;
ret = qemuMonitorGetBlockStatsParamsNumber(priv->mon, nparams);
if (tmp == 0) {
qemuDomainObjExitMonitor(driver, vm);
goto endjob;
}
ret = qemuMonitorGetBlockStatsInfo(priv->mon,
disk->info.alias,
&rd_req,
&rd_bytes,
&rd_total_times,
&wr_req,
&wr_bytes,
&wr_total_times,
&flush_req,
&flush_total_times,
&errs);
qemuDomainObjExitMonitor(driver, vm);
if (ret < 0)
goto endjob;
/* Field 'errs' is meaningless for QEMU, won't set it. */
for (i = 0; i < *nparams; i++) {
virTypedParameterPtr param = &params[i];
switch (i) {
case 0: /* fill write_bytes here */
if (virStrcpyStatic(param->field, VIR_DOMAIN_BLOCK_STATS_WRITE_BYTES) == NULL) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("Field write bytes too long for destination"));
goto cleanup;
}
param->type = VIR_TYPED_PARAM_LLONG;
param->value.l = wr_bytes;
break;
case 1: /* fill wr_operations here */
if (virStrcpyStatic(param->field, VIR_DOMAIN_BLOCK_STATS_WRITE_REQ) == NULL) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("Field write requests too long for destination"));
goto cleanup;
}
param->type = VIR_TYPED_PARAM_LLONG;
param->value.l = wr_req;
break;
case 2: /* fill read_bytes here */
if (virStrcpyStatic(param->field, VIR_DOMAIN_BLOCK_STATS_READ_BYTES) == NULL) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("Field read bytes too long for destination"));
goto cleanup;
}
param->type = VIR_TYPED_PARAM_LLONG;
param->value.l = rd_bytes;
break;
case 3: /* fill rd_operations here */
if (virStrcpyStatic(param->field, VIR_DOMAIN_BLOCK_STATS_READ_REQ) == NULL) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("Field read requests too long for destination"));
goto cleanup;
}
param->type = VIR_TYPED_PARAM_LLONG;
param->value.l = rd_req;
break;
case 4: /* fill flush_operations here */
if (virStrcpyStatic(param->field, VIR_DOMAIN_BLOCK_STATS_FLUSH_REQ) == NULL) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("Field flush requests too long for destination"));
goto cleanup;
}
param->type = VIR_TYPED_PARAM_LLONG;
param->value.l = flush_req;
break;
case 5: /* fill wr_total_times_ns here */
if (virStrcpyStatic(param->field, VIR_DOMAIN_BLOCK_STATS_WRITE_TOTAL_TIMES) == NULL) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("Field write total times too long for destination"));
goto cleanup;
}
param->type = VIR_TYPED_PARAM_LLONG;
param->value.l = wr_total_times;
break;
case 6: /* fill rd_total_times_ns here */
if (virStrcpyStatic(param->field, VIR_DOMAIN_BLOCK_STATS_READ_TOTAL_TIMES) == NULL) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("Field read total times too long for destination"));
goto cleanup;
}
param->type = VIR_TYPED_PARAM_LLONG;
param->value.l = rd_total_times;
break;
case 7: /* fill flush_total_times_ns here */
if (virStrcpyStatic(param->field, VIR_DOMAIN_BLOCK_STATS_READ_TOTAL_TIMES) == NULL) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("Field flush total times too long for destination"));
goto cleanup;
}
param->type = VIR_TYPED_PARAM_LLONG;
param->value.l = flush_total_times;
break;
default:
break;
/* should not hit here */
}
}
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virDomainObjUnlock(vm);
return ret;
}
#ifdef __linux__
static int
qemudDomainInterfaceStats (virDomainPtr dom,
@ -10363,6 +10551,7 @@ static virDriver qemuDriver = {
.domainSetSchedulerParametersFlags = qemuSetSchedulerParametersFlags, /* 0.9.2 */
.domainMigratePerform = qemudDomainMigratePerform, /* 0.5.0 */
.domainBlockStats = qemudDomainBlockStats, /* 0.4.1 */
.domainBlockStatsFlags = qemudDomainBlockStatsFlags, /* 0.9.5 */
.domainInterfaceStats = qemudDomainInterfaceStats, /* 0.4.1 */
.domainMemoryStats = qemudDomainMemoryStats, /* 0.7.5 */
.domainBlockPeek = qemudDomainBlockPeek, /* 0.4.4 */