[PATCH v13 2/2] nvmet: support reservation feature

[Dmitry Bogdanov]

On Tue, Oct 08, 2024 at 06:21:14PM +0800, Guixin Liu wrote:
> This patch implements the reservation feature, includes:
> 1. reservation register(register, unregister and replace).
> 2. reservation acquire(acquire, preempt, preempt and abort).
> 3. reservation release(release and clear).
> 4. reservation report.
> 5. set feature and get feature of reservation notify mask.
> 6. get log page of reservation event.
> 
> Not supported:
> 1. persistent reservation through power loss.
> 
> Test:
> Use nvme-cli and fio to test all implemented sub features:
> 1. use nvme resv-register to register host a registrant or
> unregister or replace a new key.
> 2. use nvme resv-acquire to set host to the holder, and use fio
> to send read and write io in all reservation type. And also test
> preempt and "preempt and abort".
> 3. use nvme resv-report to show all registrants and reservation
> status.
> 4. use nvme resv-release to release all registrants.
> 5. use nvme get-log to get events generated by the preceding
> operations.
> 
> In addition, make reservation configurable, one can set ns to
> support reservation before enable ns. The default of resv_enable
> is false.
> 
> Signed-off-by: Guixin Liu <kanie at linux.alibaba.com>

Thanks!

Reviewed-by: Dmitry Bogdanov <d.bogdanov at yadro.com>