2.1.5.21 Server Requests Setting Quota Information

The server provides:

  • Open: An Open of a Quota Stream<148>.

  • InputBuffer: A buffer that contains one or more aligned FILE_QUOTA_INFORMATION structures as defined in [MS-FSCC] section 2.4.33.

  • InputBufferSize: The size, in bytes, of InputBuffer.

On completion, the object store MUST return:

  • Status: An NTSTATUS code that specifies the result.

Support for this operation is optional. If the object store does not implement this functionality, the operation MUST be failed with STATUS_INVALID_DEVICE_REQUEST.<149>

Pseudocode for the operation is as follows:

  • If InputBufferSize is zero, the operation MUST be failed with STATUS_INVALID_PARAMETER.

  • For each FILE_QUOTA_INFORMATION structure quota in InputBuffer:

    • Scan Open.File.Volume.QuotaInformation for an entry that matches quota.Sid and if found, save a pointer in matchedQuota; else set matchedQuota to empty.

    • If quota.Sid == BUILTIN_ADMINISTRATORS (as defined in [MS-DTYP] section 2.4.2.4) and quota.QuotaLimit != -1, the operation MUST be failed with STATUS_ACCESS_DENIED.  A quota limit cannot be specified on the administrators account.

    • If quota.QuotaLimit == -2 //The quota is being deleted

      • If matchedQuota is not empty:

        • Remove matchedQuota from Open.File.Volume.QuotaInformation and delete it.

        • Set matchedQuota to empty.

      • Else

        • The operation MUST be failed with STATUS_NO_MATCH

      • Endif

    • Else if matchedQuota is not empty:

      • Set matchedQuota.QuotaThreshold to quota.QuotaThreshold.

      • Set matchedQuota.QuotaLimit to quota.QuotaLimit.

      • Set matchedQuota.ChangeTime to the current time.

    • Else: //matchedQuota is empty:

      • Set matchedQuota to a newly allocated FILE_QUOTA_INFORMATION structure.

      • Set matchedQuota.Sid to quota.Sid.

      • Set matchedQuota.SidLength to the length of quota.Sid.

      • Set matchedQuota.QuotaThreshold to quota.QuotaThreshold.

      • Set matchedQuota.QuotaLimit to quota.QuotaLimit.

      • Set matchedQuota.ChangeTime to the current time.

      • Insert matchedQuota into Volume.QuotaInformation.

      • matchedQuota.QuotaUsed is updated in the background by scanning all files in Open.File.Volume where File.SecurityDescriptor.Owner == matchedQuota.Sid.

    • EndIf

  • Upon successful completion, the object store MUST return:

    • Status set to STATUS_SUCCESS.

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