Re: [Qemu-devel] [PATCH] ATAPI pass through

[Christoph Hellwig]

On Tue, Jun 30, 2009 at 04:34:53PM +0100, Bique Alexandre wrote:
>  - I exported the data structure BDRVRawState from raw-posix.c in 
> raw-posix.h, 
> because I use the file descriptor of the bsg device to poll, write and read. 
> Maybe there is a better solution, but I didn't find what I was looking for in 
> block.h.

The way we do scsi passthrough (and ATAPI really just is SCSI
passthrough over ATA with a slightly special command set) is to call
into the ioctl/aio_ioctl methods of the block driver and let that do
the actual I/O.  I think your patch would be simpler and cleaner by
following that model