scsi: add topology support
Export the physical block size in the READ CAPACITY (16) command, and add the new block limits VPD page to export the minimum and optiomal I/O sizes. Note that we also need to bump the scsi revision level to SPC-2 as that is the minimum requirement by at least the Linux kernel to try READ CAPACITY (16) first and look at the block limits VPD page. Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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