Commit 150d71f7 authored by James Smart's avatar James Smart Committed by Christoph Hellwig
Browse files

nvmet-fc: add transport discovery change event callback support 



This patch adds support for the nvmet discovery_change transport op.
In turn, the transport adds it's own LLDD api callback discovery_event
op to request the LLDD to generate an RSCN for the discovery change.

Signed-off-by: default avatarJames Smart <jsmart2021@gmail.com>
Reviewed-by: default avatarHannes Reinecke <hare@suse.com>
Reviewed-by: default avatarArun Easi <aeasi@marvell.com>
Signed-off-by: default avatarSagi Grimberg <sagi@grimberg.me>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 9d09dd8d

drivers/nvme/target/fc.c

+11 −0
Original line number Diff line number Diff line
@@ -2549,6 +2549,16 @@ nvmet_fc_remove_port(struct nvmet_port *port) 
	kfree(pe);

}



static void

nvmet_fc_discovery_chg(struct nvmet_port *port)

{

	struct nvmet_fc_port_entry *pe = port->priv;

	struct nvmet_fc_tgtport *tgtport = pe->tgtport;



	if (tgtport && tgtport->ops->discovery_event)

		tgtport->ops->discovery_event(&tgtport->fc_target_port);

}



static const struct nvmet_fabrics_ops nvmet_fc_tgt_fcp_ops = {

	.owner			= THIS_MODULE,

	.type			= NVMF_TRTYPE_FC,
@@ -2557,6 +2567,7 @@ static const struct nvmet_fabrics_ops nvmet_fc_tgt_fcp_ops = { 
	.remove_port		= nvmet_fc_remove_port,

	.queue_response		= nvmet_fc_fcp_nvme_cmd_done,

	.delete_ctrl		= nvmet_fc_delete_ctrl,

	.discovery_chg		= nvmet_fc_discovery_chg,

};



static int __init nvmet_fc_init_module(void)

include/linux/nvme-fc-driver.h

+6 −0
Original line number Diff line number Diff line
@@ -791,6 +791,11 @@ struct nvmet_fc_target_port { 
 *       nvmefc_tgt_fcp_req.

 *       Entrypoint is Optional.

 *

 * @discovery_event:  Called by the transport to generate an RSCN

 *       change notifications to NVME initiators. The RSCN notifications

 *       should cause the initiator to rescan the discovery controller

 *       on the targetport.

 *

 * @max_hw_queues:  indicates the maximum number of hw queues the LLDD

 *       supports for cpu affinitization.

 *       Value is Mandatory. Must be at least 1.
@@ -832,6 +837,7 @@ struct nvmet_fc_target_template { 
				struct nvmefc_tgt_fcp_req *fcpreq);

	void (*defer_rcv)(struct nvmet_fc_target_port *tgtport,

				struct nvmefc_tgt_fcp_req *fcpreq);

	void (*discovery_event)(struct nvmet_fc_target_port *tgtport);



	u32	max_hw_queues;

	u16	max_sgl_segments;

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