[PATCH v2 2/2] nvme: send a rediscover uevent when a persistent discovery controller reconnects

[Daniel Wagner]

On Thu, Sep 22, 2022 at 11:15:37AM +0300, Sagi Grimberg wrote:
> When a discovery controller is disconnected, no AENs will arrive to
> notify the host about discovery log change events.
> 
> In order to solve this, send a uevent notification when a
> persistent discovery controller reconnects. We add a new ctrl
> flag NVME_CTRL_STARTED_ONCE that will be set on the first
> start, and consecutive calls will find it set, and send the
> event to userspace if the controller is a discovery controller.
> 
> Upon the event reception, userspace will re-read the discovery
> log page and will act upon changes as it sees fit.
> 
> Signed-off-by: Sagi Grimberg <sagi at grimberg.me>

Reviewed-by: Daniel Wagner <dwagner at suse.de>