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nvmet: add copy command support for bdev and file ns
Add support for handling target command on target. For bdev-ns we call into blkdev_issue_copy, which the block layer completes by a offloaded copy request to backend bdev or by emulating the request. For file-ns we call vfs_copy_file_range to service our request. Currently target always shows copy capability by setting NVME_CTRL_ONCS_COPY in controller ONCS. Signed-off-by: Nitesh Shetty <nj.shetty@samsung.com> Signed-off-by: Anuj Gupta <anuj20.g@samsung.com>
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