Redirecting FILE_OPEN_BY_FILE_ID to another volume

Rob_Green · March 27, 2003, 7:35pm

I need to redirect a request to open a file by id to another volume. I
already have requests using the name being redirected using
STATUS_REPARSE. I cant figure out what needs to be modified to do this.
I have tried returning STATUS_REPARSE with IO_REMOUNT, but I get called
again. I also saw STATUS_REPARSE_OBJECT which looked promising, but it
still ends up calling me on the original volume. I have tried setting
IrpSp->FileObject->DeviceObject and Irp->DeviceObject to the top of the
stack of the volume I want to redirect to. Also what do I do with the
FileObject->RelatedFileObject in this case?

I don’t believe I can use STATUS_REPARSE as it expects a path to be
returned and while I can get the name of the target volume, I cant get
the name of the file (I’ve read the messages on this recently).

Any pointers in the right direction?

Thanks,

Rob

Rob_Green · March 27, 2003, 7:50pm

I need to redirect a request to open a file by id to another volume. I
already have requests using the name being redirected using
STATUS_REPARSE. I cant figure out what needs to be modified to do this.
I have tried returning STATUS_REPARSE with IO_REMOUNT, but I get called
again. I also saw STATUS_REPARSE_OBJECT which looked promising, but it
still ends up calling me on the original volume. I have tried setting
IrpSp->FileObject->DeviceObject and Irp->DeviceObject to the top of the
stack of the volume I want to redirect to. Also what do I do with the
FileObject->RelatedFileObject in this case?

I don’t believe I can use STATUS_REPARSE as it expects a path to be
returned and while I can get the name of the target volume, I cant get
the name of the file (I’ve read the messages on this recently).

Any pointers in the right direction?

Thanks,

Rob

OSR_Community_User · March 27, 2003, 8:10pm

if i am not wrong, fileids are file system dependent. so i don’t think the a fileid for one volume is the same for another. btw, did u also redirect the query fileinternalinformation request?

Ampsi

----- Original Message -----
From: Rob Green
To: File Systems Developers
Sent: Friday, March 28, 2003 08:35
Subject: [ntfsd] Redirecting FILE_OPEN_BY_FILE_ID to another volume

–>
I need to redirect a request to open a file by id to another volume. I already have requests using the name being redirected using STATUS_REPARSE. I cant figure out what needs to be modified to do this. I have tried returning STATUS_REPARSE with IO_REMOUNT, but I get called again. I also saw STATUS_REPARSE_OBJECT which looked promising, but it still ends up calling me on the original volume. I have tried setting IrpSp->FileObject->DeviceObject and Irp->DeviceObject to the top of the stack of the volume I want to redirect to. Also what do I do with the FileObject->RelatedFileObject in this case?

I don’t believe I can use STATUS_REPARSE as it expects a path to be returned and while I can get the name of the target volume, I cant get the name of the file (I’ve read the messages on this recently).

Any pointers in the right direction?

Thanks,

Rob

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Rob_Green · March 27, 2003, 8:26pm

I maintain a id to id mapping, and as part of the handling in
FileInternalInformation I change it to the new file id.

Rob

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Ampsi
Sent: Thursday, March 27, 2003 8:10 PM
To: File Systems Developers
Subject: [ntfsd] Re: Redirecting FILE_OPEN_BY_FILE_ID to another volume

if i am not wrong, fileids are file system dependent. so i don’t think
the a fileid for one volume is the same for another. btw, did u also
redirect the query fileinternalinformation request?

Ampsi

----- Original Message -----

From: Rob Green mailto:xxxxx

To: File Systems mailto:xxxxx Developers

Sent: Friday, March 28, 2003 08:35

Subject: [ntfsd] Redirecting FILE_OPEN_BY_FILE_ID to another volume

–>

I need to redirect a request to open a file by id to another volume. I
already have requests using the name being redirected using
STATUS_REPARSE. I cant figure out what needs to be modified to do this.
I have tried returning STATUS_REPARSE with IO_REMOUNT, but I get called
again. I also saw STATUS_REPARSE_OBJECT which looked promising, but it
still ends up calling me on the original volume. I have tried setting
IrpSp->FileObject->DeviceObject and Irp->DeviceObject to the top of the
stack of the volume I want to redirect to. Also what do I do with the
FileObject->RelatedFileObject in this case?

I don’t believe I can use STATUS_REPARSE as it expects a path to be
returned and while I can get the name of the target volume, I cant get
the name of the file (I’ve read the messages on this recently).

Any pointers in the right direction?

Thanks,

Rob

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OSR_Community_User-393 · March 28, 2003, 9:37am

Bob,

Try this in your create dispatch routine:

Irp->IoStatus.Information = IO_REPARSE;
free the old buffer in IrpSp->FileObject->FileName;
set the new full qualified file name such as ??\d:\dir\fn.xx to
IrpSp->FileObject->FileName;
return STATUS_REPARSE;

Shangwu

“Rob Green” wrote in message news:xxxxx@ntfsd…
I need to redirect a request to open a file by id to another volume. I
already have requests using the name being redirected using STATUS_REPARSE.
I cant figure out what needs to be modified to do this. I have tried
returning STATUS_REPARSE with IO_REMOUNT, but I get called again. I also
saw STATUS_REPARSE_OBJECT which looked promising, but it still ends up
calling me on the original volume. I have tried setting
IrpSp->FileObject->DeviceObject and Irp->DeviceObject to the top of the
stack of the volume I want to redirect to. Also what do I do with the
FileObject->RelatedFileObject in this case?

I don’t believe I can use STATUS_REPARSE as it expects a path to be returned
and while I can get the name of the target volume, I cant get the name of
the file (I’ve read the messages on this recently).

Any pointers in the right direction?

Thanks,
Rob

OSR_Community_User · March 28, 2003, 11:30am

Call the FSD below you to get the fullname based on the ID and then
reparse to the name.

Looks like you are working on a NT Volume Snapshot driver

Jamey

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Rob Green
Sent: Thursday, March 27, 2003 4:35 PM
To: File Systems Developers
Subject: [ntfsd] Redirecting FILE_OPEN_BY_FILE_ID to another volume

I need to redirect a request to open a file by id to another volume. I
already have requests using the name being redirected using
STATUS_REPARSE. I cant figure out what needs to be modified to do this.
I have tried returning STATUS_REPARSE with IO_REMOUNT, but I get called
again. I also saw STATUS_REPARSE_OBJECT which looked promising, but it
still ends up calling me on the original volume. I have tried setting
IrpSp->FileObject->DeviceObject and Irp->DeviceObject to the top of the
stack of the volume I want to redirect to. Also what do I do with the
FileObject->RelatedFileObject in this case?

I don’t believe I can use STATUS_REPARSE as it expects a path to be
returned and while I can get the name of the target volume, I cant get
the name of the file (I’ve read the messages on this recently).

Any pointers in the right direction?

Thanks,

Rob

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OSR_Community_User · March 28, 2003, 11:35am

I think he knows this; what about open by ID where he has no name.

Jamey

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Shangwu Qi
Sent: Friday, March 28, 2003 6:34 AM
To: File Systems Developers
Subject: [ntfsd] Re: Redirecting FILE_OPEN_BY_FILE_ID to another volume

Bob,

Try this in your create dispatch routine:

Irp->IoStatus.Information = IO_REPARSE;
free the old buffer in IrpSp->FileObject->FileName;
set the new full qualified file name such as ??\d:\dir\fn.xx to
IrpSp->FileObject->FileName;
return STATUS_REPARSE;

Shangwu

“Rob Green” wrote in message news:xxxxx@ntfsd…
I need to redirect a request to open a file by id to another volume. I
already have requests using the name being redirected using
STATUS_REPARSE.
I cant figure out what needs to be modified to do this. I have tried
returning STATUS_REPARSE with IO_REMOUNT, but I get called again. I
also
saw STATUS_REPARSE_OBJECT which looked promising, but it still ends up
calling me on the original volume. I have tried setting
IrpSp->FileObject->DeviceObject and Irp->DeviceObject to the top of the
stack of the volume I want to redirect to. Also what do I do with the
FileObject->RelatedFileObject in this case?

I don’t believe I can use STATUS_REPARSE as it expects a path to be
returned
and while I can get the name of the target volume, I cant get the name
of
the file (I’ve read the messages on this recently).

Any pointers in the right direction?

Thanks,
Rob

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