nvmet: enable Discovery Controller AENs

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Add functions to find connections requesting Discovery Change events
and send a notification to hosts that maintain an explicit persistent
connection and have and active Asynchronous Event Request pending.
Only Hosts that have access to the Subsystem effected by the change
will receive notifications of Discovery Change event.

Call these functions each time there is a configfs change that effects
the Discover Log Pages.

Set the OAES field in the Identify Controller response to advertise the
support for Asynchronous Event Notifications.

Signed-off-by: Jay Sternberg <jay.e.sternberg@intel.com>
Reviewed-by: Phil Cayton <phil.cayton@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

...

This commit is contained in:

Jay Sternberg 2018-11-12 13:56:40 -08:00 • committed by Jens Axboe

parent 253928eec6

commit b662a07857

4 changed files with 99 additions and 12 deletions

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30

drivers/nvme/target/configfs.c

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2

drivers/nvme/target/core.c

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68

drivers/nvme/target/discovery.c

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11

drivers/nvme/target/nvmet.h

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