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Implement domainGetMemoryParamters for LXC 

Driver interface for getting memory parameters, eg. hard_limit,
soft_limit and swap_hard_limit.
This commit is contained in:
Nikunj A. Dadhania 2010-10-12 18:39:05 +02:00 committed by Daniel Veillard
parent 0cdd1ed91b
commit fe3ee289b2
1 changed files with 119 additions and 1 deletions
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120
src/lxc/lxc_driver.c
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@ -55,6 +55,8 @@
#define VIR_FROM_THIS VIR_FROM_LXC
#define LXC_NB_MEM_PARAM 3
typedef struct _lxcDomainObjPrivate lxcDomainObjPrivate;
typedef lxcDomainObjPrivate *lxcDomainObjPrivatePtr;
struct _lxcDomainObjPrivate {
@ -774,6 +776,122 @@ cleanup:
return ret;
}
static int lxcDomainGetMemoryParameters(virDomainPtr dom,
virMemoryParameterPtr params,
int *nparams,
unsigned int flags ATTRIBUTE_UNUSED)
{
lxc_driver_t *driver = dom->conn->privateData;
int i;
virCgroupPtr cgroup = NULL;
virDomainObjPtr vm = NULL;
unsigned long val;
int ret = -1;
int rc;
lxcDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (vm == NULL) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
lxcError(VIR_ERR_NO_DOMAIN,
_("No domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if ((*nparams) == 0) {
/* Current number of memory parameters supported by cgroups */
*nparams = LXC_NB_MEM_PARAM;
ret = 0;
goto cleanup;
}
if ((*nparams) != LXC_NB_MEM_PARAM) {
lxcError(VIR_ERR_INVALID_ARG,
"%s", _("Invalid parameter count"));
goto cleanup;
}
if (virCgroupForDomain(driver->cgroup, vm->def->name, &cgroup, 0) != 0) {
lxcError(VIR_ERR_INTERNAL_ERROR,
_("Unable to get cgroup for %s"), vm->def->name);
goto cleanup;
}
ret = 0;
for (i = 0; i < *nparams; i++) {
virMemoryParameterPtr param = &params[i];
val = 0;
param->value.ul = 0;
param->type = VIR_DOMAIN_MEMORY_PARAM_ULLONG;
switch(i) {
case 0: /* fill memory hard limit here */
rc = virCgroupGetMemoryHardLimit(cgroup, &val);
if (rc != 0) {
virReportSystemError(-rc, "%s",
_("unable to get memory hard limit"));
ret = -1;
continue;
}
if (virStrcpyStatic(param->field, VIR_DOMAIN_MEMORY_HARD_LIMIT) == NULL) {
lxcError(VIR_ERR_INTERNAL_ERROR,
"%s", _("Field memory hard limit too long for destination"));
ret = -1;
continue;
}
param->value.ul = val;
break;
case 1: /* fill memory soft limit here */
rc = virCgroupGetMemorySoftLimit(cgroup, &val);
if (rc != 0) {
virReportSystemError(-rc, "%s",
_("unable to get memory soft limit"));
ret = -1;
continue;
}
if (virStrcpyStatic(param->field, VIR_DOMAIN_MEMORY_SOFT_LIMIT) == NULL) {
lxcError(VIR_ERR_INTERNAL_ERROR,
"%s", _("Field memory soft limit too long for destination"));
ret = -1;
continue;
}
param->value.ul = val;
break;
case 2: /* fill swap hard limit here */
rc = virCgroupGetSwapHardLimit(cgroup, &val);
if (rc != 0) {
virReportSystemError(-rc, "%s",
_("unable to get swap hard limit"));
ret = -1;
continue;
}
if (virStrcpyStatic(param->field, VIR_DOMAIN_SWAP_HARD_LIMIT) == NULL) {
lxcError(VIR_ERR_INTERNAL_ERROR,
"%s", _("Field swap hard limit too long for destination"));
ret = -1;
continue;
}
param->value.ul = val;
break;
default:
break;
/* should not hit here */
}
}
cleanup:
if (cgroup)
virCgroupFree(&cgroup);
if (vm)
virDomainObjUnlock(vm);
lxcDriverUnlock(driver);
return ret;
}
static char *lxcDomainDumpXML(virDomainPtr dom,
int flags)
{
@ -2718,7 +2836,7 @@ static virDriver lxcDriver = {
NULL, /* domainSnapshotDelete */
NULL, /* qemuDomainMonitorCommand */
lxcDomainSetMemoryParameters, /* domainSetMemoryParameters */
NULL, /* domainGetMemoryParameters */
lxcDomainGetMemoryParameters, /* domainGetMemoryParameters */
};
static virStateDriver lxcStateDriver = {