}

// ShardSize - returns actual shared size from erasure blockSize.
func (e ErasureInfo) ShardSize() int64 {
	return ceilFrac(e.BlockSize, int64(e.DataBlocks))
}

// IsValid - tells if erasure info fields are valid.
func (fi FileInfo) IsValid() bool {
	if fi.Deleted {
		// Delete marker has no data, no need to check
		// for erasure coding information
		return true
	}
	dataBlocks := fi.Erasure.DataBlocks

	if err := storageServerRequestValidate(r); err != nil {
		s.writeErrorResponse(w, err)
		return false
	}

	return true
}

// IsValid - To authenticate and check if the disk-id in the request corresponds to the underlying disk.
func (s *storageRESTServer) IsValid(w http.ResponseWriter, r *http.Request) bool {
	if !s.IsAuthValid(w, r) {
		return false
	}

	if err := r.ParseForm(); err != nil {

	freeVersionID := fi.TierFreeVersionID()
	freeVersionMarker := fi.TierFreeVersion()

	// Update `xl.meta` content on each disks.
	for index := range metaArr {
		if metaArr[index].IsValid() {
			metaArr[index].ModTime = modTime
			metaArr[index].VersionID = versionID
			if !metaArr[index].InlineData() {
				// If the data is not inlined, we may end up incorrectly

}

// SetTarget - sets a new minio-go client target for this bucket.
func (sys *BucketTargetSys) SetTarget(ctx context.Context, bucket string, tgt *madmin.BucketTarget, update bool) error {
	if !tgt.Type.IsValid() && !update {
		return BucketRemoteArnTypeInvalid{Bucket: bucket}
	}
	clnt, err := sys.getRemoteTargetClient(tgt)
	if err != nil {
		return BucketRemoteTargetNotFound{Bucket: tgt.TargetBucket, Err: err}
	}

	atomic.StoreUint64(&sys.LastRefreshTimeUnixNano, uint64(loadStartTime.Add(loadDuration).UnixNano()))
	atomic.AddUint64(&sys.TotalRefreshSuccesses, 1)

	if !globalSiteReplicatorCred.IsValid() {
		sa, _, err := sys.getServiceAccount(ctx, siteReplicatorSvcAcc)
		if err == nil {
			globalSiteReplicatorCred.Set(sa.Credentials)
		}
	}

	if firstTime {

		return
	}

	// Validate storage class metadata if present
	dstSc := r.Header.Get(xhttp.AmzStorageClass)
	if dstSc != "" && !storageclass.IsValid(dstSc) {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidStorageClass), r.URL)
		return
	}

	// Check if bucket encryption is enabled
	sseConfig, _ := globalBucketSSEConfigSys.Get(dstBucket)

	}

	// When looking for a user's policies, we also check if the user
	// and the groups they are member of are enabled.
	u, ok := c.iamUsersMap[name]
	if ok {
		if !u.Credentials.IsValid() {
			return nil, time.Time{}, nil
		}
	}

	// For internal IDP regular/service account user accounts, the policy
	// mapping is iamUserPolicyMap. For STS accounts, the parent user would be

}

func (s *siteReplicatorCred) Set(c auth.Credentials) {
	s.Lock()
	defer s.Unlock()
	s.Creds = c
}

func (s *siteReplicatorCred) IsValid() bool {
	s.RLock()
	defer s.RUnlock()
	return s.Creds.IsValid()

		{7, 4},
		// Insert part.
		{3, 2},
		// Replace existing part.
		{4, 3},
		// Missing part.
		{6, -1},
	}

	// Setup.
	fi := newFileInfo("test-object", 8, 8)
	fi.Erasure.Index = 1
	if !fi.IsValid() {
		t.Fatalf("unable to get xl meta")
	}

	// Test them.
	for _, testCase := range testCases {
		if testCase.expectedIndex > -1 {
			partNumString := strconv.Itoa(testCase.partNum)

func (cred Credentials) IsImpliedPolicy() bool {
	if cred.IsServiceAccount() {
		return cred.Claims[iamPolicyClaimNameSA] == "inherited-policy"
	}
	return false
}

// IsValid - returns whether credential is valid or not.
func (cred Credentials) IsValid() bool {
	// Verify credentials if its enabled or not set.
	if cred.Status == AccountOff {
		return false
	}