> On Oct 21, 2020, at 4:27 AM, Nilesh Javali <njavali@xxxxxxxxxxx> wrote:
>
> 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
>
Reviewed-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
--
Himanshu Madhani Oracle Linux Engineering
