From 9d09dd8d7626b9124ce4bc081aabcb0590173b27 Mon Sep 17 00:00:00 2001 From: James Smart Date: Tue, 14 May 2019 14:58:02 -0700 Subject: 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 Reviewed-by: Hannes Reinecke Reviewed-by: Arun Easi Signed-off-by: Sagi Grimberg Signed-off-by: Christoph Hellwig --- drivers/nvme/target/discovery.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/nvme/target/discovery.c') diff --git a/drivers/nvme/target/discovery.c b/drivers/nvme/target/discovery.c index 5baf269f3f8a..8efca26b4776 100644 --- a/drivers/nvme/target/discovery.c +++ b/drivers/nvme/target/discovery.c @@ -41,6 +41,10 @@ void nvmet_port_disc_changed(struct nvmet_port *port, __nvmet_disc_changed(port, ctrl); } mutex_unlock(&nvmet_disc_subsys->lock); + + /* If transport can signal change, notify transport */ + if (port->tr_ops && port->tr_ops->discovery_chg) + port->tr_ops->discovery_chg(port); } static void __nvmet_subsys_disc_changed(struct nvmet_port *port, -- cgit v1.2.3