Commit 4cf7c363 authored by James Smart's avatar James Smart Committed by Christoph Hellwig
Browse files

nvme-fcloop: add support for nvmet discovery_event op 



Update fcloop to support the discovery_event operation and
invoke a nvme rescan. In a real fc adapter, this would generate an
RSCN, which the host would receive and convert into a nvme rescan
on the remote port specified in the rscn payload.

Signed-off-by: default avatarJames Smart <jsmart2021@gmail.com>
[kbuild-bot: fcloop_tgt_discovery_evt can be static]
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 150d71f7

drivers/nvme/target/fcloop.c

+37 −0
Original line number Diff line number Diff line
@@ -231,6 +231,11 @@ struct fcloop_lsreq { 
	int				status;

};



struct fcloop_rscn {

	struct fcloop_tport		*tport;

	struct work_struct		work;

};



enum {

	INI_IO_START		= 0,

	INI_IO_ACTIVE		= 1,
@@ -348,6 +353,37 @@ fcloop_xmt_ls_rsp(struct nvmet_fc_target_port *tport, 
	return 0;

}



/*

 * Simulate reception of RSCN and converting it to a initiator transport

 * call to rescan a remote port.

 */

static void

fcloop_tgt_rscn_work(struct work_struct *work)

{

	struct fcloop_rscn *tgt_rscn =

		container_of(work, struct fcloop_rscn, work);

	struct fcloop_tport *tport = tgt_rscn->tport;



	if (tport->remoteport)

		nvme_fc_rescan_remoteport(tport->remoteport);

	kfree(tgt_rscn);

}



static void

fcloop_tgt_discovery_evt(struct nvmet_fc_target_port *tgtport)

{

	struct fcloop_rscn *tgt_rscn;



	tgt_rscn = kzalloc(sizeof(*tgt_rscn), GFP_KERNEL);

	if (!tgt_rscn)

		return;



	tgt_rscn->tport = tgtport->private;

	INIT_WORK(&tgt_rscn->work, fcloop_tgt_rscn_work);



	schedule_work(&tgt_rscn->work);

}



static void

fcloop_tfcp_req_free(struct kref *ref)

{
@@ -839,6 +875,7 @@ static struct nvmet_fc_target_template tgttemplate = { 
	.fcp_op			= fcloop_fcp_op,

	.fcp_abort		= fcloop_tgt_fcp_abort,

	.fcp_req_release	= fcloop_fcp_req_release,

	.discovery_event	= fcloop_tgt_discovery_evt,

	.max_hw_queues		= FCLOOP_HW_QUEUES,

	.max_sgl_segments	= FCLOOP_SGL_SEGS,

	.max_dif_sgl_segments	= FCLOOP_SGL_SEGS,

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