From: Shyam Sundar <ssundar@xxxxxxxxxxx>
Add statistics for Congestion Signals that are delivered to the host as
interrupt signals, under fc_host_statistics.
Signed-off-by: Shyam Sundar <ssundar@xxxxxxxxxxx>
Signed-off-by: Nilesh Javali <njavali@xxxxxxxxxxx>
Reviewed-by: James Smart <james.smart@xxxxxxxxxxxx>
---
drivers/scsi/scsi_transport_fc.c | 5 +++++
include/scsi/scsi_transport_fc.h | 3 +++
2 files changed, 8 insertions(+)
diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c
index 4dfa0e40d8e5..3f816ab1d845 100644
--- a/drivers/scsi/scsi_transport_fc.c
+++ b/drivers/scsi/scsi_transport_fc.c
@@ -2100,6 +2100,9 @@ fc_host_statistic(fc_xid_not_found);
fc_host_statistic(fc_xid_busy);
fc_host_statistic(fc_seq_not_found);
fc_host_statistic(fc_non_bls_resp);
+fc_host_statistic(cn_sig_warn);
+fc_host_statistic(cn_sig_alarm);
+
#define fc_host_fpin_statistic(name) \
static ssize_t fc_host_fpinstat_##name(struct device *cd, \
@@ -2182,6 +2185,8 @@ static struct attribute *fc_statistics_attrs[] = {
&device_attr_host_fc_xid_busy.attr,
&device_attr_host_fc_seq_not_found.attr,
&device_attr_host_fc_non_bls_resp.attr,
+ &device_attr_host_cn_sig_warn.attr,
+ &device_attr_host_cn_sig_alarm.attr,
&device_attr_host_reset_statistics.attr,
&device_attr_host_fpin_dn.attr,
&device_attr_host_fpin_dn_unknown.attr,
diff --git a/include/scsi/scsi_transport_fc.h b/include/scsi/scsi_transport_fc.h
index a636c1986e22..c759b29e46c7 100644
--- a/include/scsi/scsi_transport_fc.h
+++ b/include/scsi/scsi_transport_fc.h
@@ -468,6 +468,9 @@ struct fc_host_statistics {
u64 fc_seq_not_found; /* seq is not found for exchange */
u64 fc_non_bls_resp; /* a non BLS response frame with
a sequence responder in new exch */
+ /* Host Congestion Signals */
+ u64 cn_sig_warn;
+ u64 cn_sig_alarm;
};
--
2.19.0.rc0
