"/usr/sbin/xfs_quota",
	"/bin/xfs_quota"}

var quotaParseRegexp = regexp.MustCompilePOSIX("^[^ \t]*[ \t]*([0-9]+)")

var lsattrCmd = "/usr/bin/lsattr"
var lsattrParseRegexp = regexp.MustCompilePOSIX("^ *([0-9]+) [^ ]+ (.*)$")

// GetQuotaApplier -- does this backing device support quotas that
// can be applied to directories?

	minQuotaPeriod = 1000
)

// milliCPUToQuota converts milliCPU to CFS quota and period values
// Input parameters and resulting value is number of microseconds.
func milliCPUToQuota(milliCPU int64, period int64) (quota int64) {
	// CFS quota is measured in two values:
	//  - cfs_period_us=100ms (the amount of time to measure usage across)
	//  - cfs_quota=20ms (the amount of cpu time allowed to be used across a period)

	MinQuotaPeriod = 1000
)

// MilliCPUToQuota converts milliCPU to CFS quota and period values.
// Input parameters and resulting value is number of microseconds.
func MilliCPUToQuota(milliCPU int64, period int64) (quota int64) {
	// CFS quota is measured in two values:
	//  - cfs_period_us=100ms (the amount of time to measure usage across given by period)
	//  - cfs_quota=20ms (the amount of cpu time allowed to be used across a period)

	"k8s.io/apimachinery/pkg/runtime/schema"
	quota "k8s.io/apiserver/pkg/quota/v1"
	"k8s.io/apiserver/pkg/quota/v1/generic"
	"k8s.io/kubernetes/pkg/apis/authentication"
	"k8s.io/kubernetes/pkg/apis/authorization"
	"k8s.io/kubernetes/pkg/quota/v1/evaluator/core"
)

// NewQuotaConfigurationForAdmission returns a quota configuration for admission control.
func NewQuotaConfigurationForAdmission() quota.Configuration {

## Set bucket quota configuration

### Set a hard quota of 1GB for a bucket `mybucket` on MinIO object storage

```sh
mc admin bucket quota myminio/mybucket --hard 1gb
```

### Verify the quota configured on `mybucket` on MinIO

```sh
mc admin bucket quota myminio/mybucket
```

### Clear bucket quota configuration for `mybucket` on MinIO

```sh

	// with any storage class, the list would include
	// ".storageclass.storage.k8s.io/requests.storage"
	MatchContains []string

	// For each intercepted request, the quota system will figure out if the input object
	// satisfies a scope which is present in this listing, then
	// quota system will ensure that there is a covering quota.  In the

	"k8s.io/apimachinery/pkg/runtime/schema"
	quota "k8s.io/apiserver/pkg/quota/v1"
)

// implements a basic registry
type simpleRegistry struct {
	lock sync.RWMutex
	// evaluators tracked by the registry
	evaluators map[schema.GroupResource]quota.Evaluator
}

// NewRegistry creates a simple registry with initial list of evaluators
func NewRegistry(evaluators []quota.Evaluator) quota.Registry {
	return &simpleRegistry{

//     and the running quota doesn't change.  If it did fit, check to see if any quota was changed.  If there was no quota change
//     mark the waiter as succeeded.  If some quota did change, update the running quotas
//  2. If no running quota was changed, return now since no updates are needed.

				// We are only interested in observing updates to quota.spec to drive updates to quota.status.
				// We ignore all updates to quota.Status because they are all driven by this controller.
				// IMPORTANT:
				// We do not use this function to queue up a full quota recalculation.  To do so, would require
				// us to enqueue all quota.Status updates, and since quota.Status updates involve additional queries

	Resource string `json:"resource"`

	// For each intercepted request, the quota system will evaluate
	// its resource usage.  It will iterate through each resource consumed
	// and if the resource contains any substring in this listing, the
	// quota system will ensure that there is a covering quota.  In the
	// absence of a covering quota, the quota system will deny the request.
	// For example, if an administrator wants to globally enforce that