Re: [ntfsd] File size doesn't change in explore.

NTFSD
1

> 1) When the file size is changed(request such as

IRP_MJ_SET_INFORMATION, IRP_MJ_WRITE, etc),
I call FsRtlNotifyFullReportChange with Filter:FILE_NOTIFY_CHANGE_SIZE.

That sounds reasonable.

  1. I didn’t find the IRP_MJ_NETWORK_QUERY_OPEN major function
    code in my driver. Is it essential?

Ah sorry, you are an FSD aren’t you. In this case it is the
FastIoQueryOpen path.

Rod

发件人： Rod Widdowson
收件人： Windows File Systems Devs Interest List
发送日期： 2009/11/14 (周六) 5:28:20 下午
主 题： Re:[ntfsd] File size doesn’t change in explore.

These things are often due to either

1) Not changing the size in IRP_MJ_DIRECTORY_CONTROL
2) Not changing the size in IRP_MJ_NETWORK_QUERY_OPEN

If I might also be so bold: try starting with a test application which is
less “challenging” than explorer. Ladislav’s (free) Filetest
(http://www.zezula.net/) is awesome for discovering what is happening and
you only ever see one IRP at a time.

Good luck

Rod

"光凯 å¼ " wrote in message news:xxxxx@ntfsd…
Hi, guys

First of all, sorry for my poor english.

I got a problem about the file size.
In my file system driver, I handle the IRP_MJ_FILE_INFORMATION request.
And it passes the right value to me(I use filetest to do
NtQueryInformation).
But the explorer shows that the file size is 0 bytes. I just don’t know why?
When the file size need to be changed, I set the FO_FILE_MODIFIED flag on
the FileObject, and report the change to the directory. Just hope someone
can
give me a hint. Thanks.

Here is my dispatch route to handle IRP_MJ_FILE_INFORMATION:

NTSTATUS
EnfsQueryFileInformation(
IN PENFS_IRP_CONTEXT IrpContext
)
{
//do some check…
switch (FileInformationClass) {
case FileBasicInformation:
{ // Process it and break…
}
case FileStandardInformation:
{ // Process it and break…
}
case FileInternalInformation:
{ // Process it and break…
}
case FileEaInformation:
{ // Process it and break…
}
case FileNameInformation:
{ // Process it and break…
}
case FilePostionInformation:
{ // Process it and break…
}
case FileAllInformation:
{ // Process it and break…
}
case FileNetworkOpenInformation:
{ // Process it and break…
}
case FileAttributeTagInformation:
{ // Process it and break…
}
default:
Status = STATUS_INVALID_PARAMETER;
}

// According to the status code, requeue it requst or complete the request
}


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