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qemu: Add optional unit to qemuMigrationParamsTPMapItem

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Some migration parameters supported by libvirt may use units that differ
from the units used by QEMU for the corresponding parameters. For
example, libvirt defines migration bandwidth in MiB/s while QEMU expects
B/s. Let's add a unit field to qemuMigrationParamsTPMapItem for
automatic conversion when translating between libvirt's migration typed
parameters and QEMU's migration paramteres.

This patch is a preparation for future parameters as the existing
VIR_MIGRATE_PARAM_BANDWIDTH parameter is set using "migrate_set_speed"
QMP command rather than "migrate-set-parameters" for backward
compatibility.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Jiri Denemark 2019-01-31 10:02:17 +01:00
parent 9e7a163b13
commit c160275d9c
1 changed files with 51 additions and 12 deletions
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63
src/qemu/qemu_migration_params.c
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@ -120,6 +120,7 @@ struct _qemuMigrationParamsFlagMapItem {
typedef struct _qemuMigrationParamsTPMapItem qemuMigrationParamsTPMapItem;
struct _qemuMigrationParamsTPMapItem {
const char *typedParam;
unsigned int unit;
qemuMigrationParam param;
int party; /* bit-wise OR of qemuMigrationParty */
};
@ -273,7 +274,8 @@ qemuMigrationParamsGetTPInt(qemuMigrationParamsPtr migParams,
qemuMigrationParam param,
virTypedParameterPtr params,
int nparams,
const char *name)
const char *name,
unsigned int unit)
{
int rc;
@ -287,6 +289,17 @@ qemuMigrationParamsGetTPInt(qemuMigrationParamsPtr migParams,
&migParams->params[param].value.i)) < 0)
return -1;
if (unit > 0) {
unsigned int max = UINT_MAX / unit;
if (migParams->params[param].value.i > max) {
virReportError(VIR_ERR_OVERFLOW,
_("migration parameter '%s' must be less than %u"),
name, max + 1);
return -1;
}
migParams->params[param].value.i *= unit;
}
migParams->params[param].set = !!rc;
return 0;
}
@ -298,16 +311,22 @@ qemuMigrationParamsSetTPInt(qemuMigrationParamsPtr migParams,
virTypedParameterPtr *params,
int *nparams,
int *maxparams,
const char *name)
const char *name,
unsigned int unit)
{
int value;
if (qemuMigrationParamsCheckType(param, QEMU_MIGRATION_PARAM_TYPE_INT) < 0)
return -1;
if (!migParams->params[param].set)
return 0;
return virTypedParamsAddInt(params, nparams, maxparams, name,
migParams->params[param].value.i);
value = migParams->params[param].value.i;
if (unit > 0)
value /= unit;
return virTypedParamsAddInt(params, nparams, maxparams, name, value);
}
@ -316,7 +335,8 @@ qemuMigrationParamsGetTPULL(qemuMigrationParamsPtr migParams,
qemuMigrationParam param,
virTypedParameterPtr params,
int nparams,
const char *name)
const char *name,
unsigned int unit)
{
int rc;
@ -330,6 +350,17 @@ qemuMigrationParamsGetTPULL(qemuMigrationParamsPtr migParams,
&migParams->params[param].value.ull)) < 0)
return -1;
if (unit > 0) {
unsigned long long max = ULLONG_MAX / unit;
if (migParams->params[param].value.ull > max) {
virReportError(VIR_ERR_OVERFLOW,
_("migration parameter '%s' must be less than %llu"),
name, max + 1);
return -1;
}
migParams->params[param].value.ull *= unit;
}
migParams->params[param].set = !!rc;
return 0;
}
@ -341,16 +372,22 @@ qemuMigrationParamsSetTPULL(qemuMigrationParamsPtr migParams,
virTypedParameterPtr *params,
int *nparams,
int *maxparams,
const char *name)
const char *name,
unsigned int unit)
{
unsigned long long value;
if (qemuMigrationParamsCheckType(param, QEMU_MIGRATION_PARAM_TYPE_ULL) < 0)
return -1;
if (!migParams->params[param].set)
return 0;
return virTypedParamsAddULLong(params, nparams, maxparams, name,
migParams->params[param].value.ull);
value = migParams->params[param].value.ull;
if (unit > 0)
value /= unit;
return virTypedParamsAddULLong(params, nparams, maxparams, name, value);
}
@ -465,13 +502,15 @@ qemuMigrationParamsFromFlags(virTypedParameterPtr params,
switch (qemuMigrationParamTypes[item->param]) {
case QEMU_MIGRATION_PARAM_TYPE_INT:
if (qemuMigrationParamsGetTPInt(migParams, item->param, params,
nparams, item->typedParam) < 0)
nparams, item->typedParam,
item->unit) < 0)
goto error;
break;
case QEMU_MIGRATION_PARAM_TYPE_ULL:
if (qemuMigrationParamsGetTPULL(migParams, item->param, params,
nparams, item->typedParam) < 0)
nparams, item->typedParam,
item->unit) < 0)
goto error;
break;
@ -533,14 +572,14 @@ qemuMigrationParamsDump(qemuMigrationParamsPtr migParams,
case QEMU_MIGRATION_PARAM_TYPE_INT:
if (qemuMigrationParamsSetTPInt(migParams, item->param,
params, nparams, maxparams,
item->typedParam) < 0)
item->typedParam, item->unit) < 0)
return -1;
break;
case QEMU_MIGRATION_PARAM_TYPE_ULL:
if (qemuMigrationParamsSetTPULL(migParams, item->param,
params, nparams, maxparams,
item->typedParam) < 0)
item->typedParam, item->unit) < 0)
return -1;
break;