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: James Smart <jsmart2021@gmail.com>
[kbuild-bot: fcloop_tgt_discovery_evt can be static]
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>
diff --git a/drivers/nvme/target/fcloop.c b/drivers/nvme/target/fcloop.c
index 381b5a9..b8c1cc5 100644
--- a/drivers/nvme/target/fcloop.c
+++ b/drivers/nvme/target/fcloop.c
@@ -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,