tree fd16dcee80675a6e96e043a8544696c4129bfefa
parent 98347a7d8a93ef8a01c8d1946a2059f38f73b239
author Keith Busch <keith.busch@intel.com> 1455814668 -0700
committer Jens Axboe <axboe@fb.com> 1458139585 -0700

NVMe: Expose ns wwid through single sysfs entry

The method to uniquely identify a namespace depends on the controller's
specification revision level and implemented capabilities. This patch
has the driver figure this out and exports the unique string through a
single 'wwid' attribute so the user doesn't have this burden.

The longest namespace unique identifier is used if available. If not
available, the driver will concat the controller's vendor, serial,
and model with the namespace ID. The specification provides this as a
unique indentifier.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Jens Axboe <axboe@fb.com>