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MFC kernel part of r350523, r350524, r350961:

Description

MFC kernel part of r350523, r350524, r350961:
Add IOCTL to translate nvdX into nvmeY and NSID.

While very useful by itself, it also makes nvmecontrol not depend on
hardcoded device names parsing, that in its turn makes simple to take
nvdX (and potentially any other) device names as arguments.

Also added IOCTL bypass from nvdX to respective nvmeYnsZ makes them
interchangeable for management purposes.

Details

Committed
mavAug 13 2019, 7:23 PM
Parents
rS350995: MFC r350961: Missed part of r350523.
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