[Libguestfs] nbdcpy: from scratch nbdcopy using io_uring

[Richard W.M. Jones]

On Sat, Aug 07, 2021 at 09:53:10PM +0530, Abhay Raj Singh wrote:
> Fixed the issue, I needed to learn to use Wireshark so took some time.
> Turns out I was not updating the offset for an 'operation' / operation
> slot in a rare case.
> 
> As an operation owns and NBD handle (the number) say 7
> 
> Initially, it read from offset 512 then 2048 then 4096, etc.
> But was always writing to offset 512 (in rare cases) because I didn't
> update the offset field of operation slot.
> 
> There's a bug where it gets stuck after reading 300KB or so, should be
> done by tomorrow.

OK, let me know how it goes :-)

Rich.

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