FltGetFileNameInformation issue

NTFSD
1

FltGetFileNameInformation fails in post-create. Below is the state at the time of failure:

  1. IoGetTopLevelIrp returns null
  2. OperationFlags, SL_OPEN_PAGING_FILE is false
  3. Fails for both FLT_FILE_NAME_OPENED and FLT_FILE_NAME_NORMALIZED
  4. IRQL < DISPATCH
  5. System is Win2k3 SP1

This happens after FltGetStreamContext fails with status STATUS_NOT_SUPPORTED and when I try to get the filename.

Sajeev

2

Welcome to the wonderful world of FltGetFileNameInformation bugs :wink:
You have only one choice: call the API during pre-create and save the information for post-create.

xxxxx@yahoo.com wrote:

FltGetFileNameInformation fails in post-create. Below is the state at the time of failure:

  1. IoGetTopLevelIrp returns null
  2. OperationFlags, SL_OPEN_PAGING_FILE is false
  3. Fails for both FLT_FILE_NAME_OPENED and FLT_FILE_NAME_NORMALIZED
  4. IRQL < DISPATCH
  5. System is Win2k3 SP1

This happens after FltGetStreamContext fails with status STATUS_NOT_SUPPORTED and when I try to get the filename.

Sajeev

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3

It was my mistake - this happens only if the operation itself failed.

Dejan, I will keep this in mind if I hit a genuine bug with this.