Need to intercept open&write calls for vdi file when VirtualBox is working.

Need to intercept open&write calls for vdi file when VirtualBox is working.

[Sergey Malykhin]

Hi,

My problem - I have to intercept open&write function calls to .vdi file
when VirtualBox is working to control which sectors of vdi file were
changed, i.e. I need to get 1. what file was open for writing; 2. data
from buffer; 3. size of data; 4. offset in file;

I tryed: 
          - LD_PRELOAD - not helped

          - using fuse - rewrote write call and successfully
intercepted, but fuse is slow.

I have possibilities to patch ext3 or patch inotify.

Is there any better way to do it?

TIA

Re: Need to intercept open&write calls for vdi file when VirtualBox is working.

[David Newall]

Sergey,

Perhaps btrfs, or similar, would be a good starting point.

David