NTSTATUS
DokanSetAllocationInformation(
PEVENT_CONTEXT EventContext,
PDOKAN_FILE_INFO FileInfo,
PDOKAN_OPERATIONS DokanOperations)
{
PFILE_ALLOCATION_INFORMATION allocInfo =
(PFILE_ALLOCATION_INFORMATION)((PCHAR)EventContext + EventContext->Operation.SetFile.BufferOffset);
// A file's allocation size and end-of-file position are independent of each other,
// with the following exception: The end-of-file position must always be less than
// or equal to the allocation size. If the allocation size is set to a value that
// is less than the end-of-file position, the end-of-file position is automatically
// adjusted to match the allocation size.
if (DokanOperations->SetAllocationSize) {
return DokanOperations->SetAllocationSize(
EventContext->Operation.SetFile.FileName,
allocInfo->AllocationSize.QuadPart,
FileInfo);
}
// How can we check the current end-of-file position?
if (allocInfo->AllocationSize.QuadPart == 0) {
return DokanOperations->SetEndOfFile(
EventContext->Operation.SetFile.FileName,
allocInfo->AllocationSize.QuadPart,
FileInfo);
} else {
DbgPrint(" SetAllocationInformation %I64d, can't handle this parameter.\n",
allocInfo->AllocationSize.QuadPart);
}
return STATUS_SUCCESS;
}
NTSTATUS
DokanSetValidDataLengthInformation(
PEVENT_CONTEXT EventContext,
PDOKAN_FILE_INFO FileInfo,
PDOKAN_OPERATIONS DokanOperations)
{
PFILE_VALID_DATA_LENGTH_INFORMATION validInfo =
(PFILE_VALID_DATA_LENGTH_INFORMATION)((PCHAR)EventContext + EventContext->Operation.SetFile.BufferOffset);
if (!DokanOperations->SetEndOfFile)
return STATUS_NOT_IMPLEMENTED;
return DokanOperations->SetEndOfFile(
EventContext->Operation.SetFile.FileName,
validInfo->ValidDataLength.QuadPart,
FileInfo);
}
NTSTATUS
DokanSetEndOfFileInformation(
PEVENT_CONTEXT EventContext,
PDOKAN_FILE_INFO FileInfo,
PDOKAN_OPERATIONS DokanOperations)
{
PFILE_END_OF_FILE_INFORMATION endInfo =
(PFILE_END_OF_FILE_INFORMATION)((PCHAR)EventContext + EventContext->Operation.SetFile.BufferOffset);
if (!DokanOperations->SetEndOfFile)
return STATUS_NOT_IMPLEMENTED;
return DokanOperations->SetEndOfFile(
EventContext->Operation.SetFile.FileName,
endInfo->EndOfFile.QuadPart,
FileInfo);
}
