nvmet: add transport discovery change op
authorJames Smart <jsmart2021@gmail.com>
Tue, 14 May 2019 21:58:02 +0000 (14:58 -0700)
committerChristoph Hellwig <hch@lst.de>
Fri, 21 Jun 2019 09:08:37 +0000 (11:08 +0200)
commit9d09dd8d7626b9124ce4bc081aabcb0590173b27
tree59ef879fa6298a61c586c2fc5b3b8533fe460350
parent474a280036e8d319ef852f1dec59bedf4eda0107
nvmet: add transport discovery change op

Some transports, such as FC-NVME, support discovery controller change
events without the use of a persistent discovery controller. FC receives
events via RSCN from the FC Fabric Controller or subsystem FC port.

This patch adds a nvmet transport op that is called whenever a
discovery change event occurs in the nvmet layer.

To facilitate the callback without adding another layer to cross into
core.c to reference the transport ops, the port structure snapshots
the transport ops when the port is enabled and clears them when disabled.

Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Arun Easi <aeasi@marvell.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
drivers/nvme/target/core.c
drivers/nvme/target/discovery.c
drivers/nvme/target/nvmet.h