[PATCH v4 07/15] nvme: Introduce FENCING and FENCED controller states

[Hannes Reinecke]

On 3/28/26 01:43, Mohamed Khalfella wrote:
> FENCING is a new controller state that a LIVE controller enters when an
> error is encountered. While in FENCING state, inflight IOs that timeout
> are not canceled because they should be held until either CCR succeeds
> or time-based recovery completes. While the queues remain alive, requests
> are not allowed to be sent in this state, and the controller cannot be
> reset or deleted. This is intentional because resetting or deleting the
> controller results in canceling inflight IOs.
> 
> FENCED is a short-term state the controller enters before it is reset.
> It exists only to prevent manual resets from happening while controller
> is in FENCING state.
> 
> Signed-off-by: Mohamed Khalfella <mkhalfella at purestorage.com>
> ---
>   drivers/nvme/host/core.c  | 27 +++++++++++++++++++++++++--
>   drivers/nvme/host/nvme.h  |  4 ++++
>   drivers/nvme/host/sysfs.c |  2 ++
>   3 files changed, 31 insertions(+), 2 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare at suse.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                  Kernel Storage Architect
hare at suse.de                                +49 911 74053 688
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