nvmet: add tracing of authentication commands

Add nvme_fabrics_type_auth_send and nvme_fabrics_type_auth_receive
to the nvme target's tracing facility.
Signed-off-by: Guixin Liu <kanie@linux.alibaba.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>

drivers/nvme/target/trace.c

@@ -176,6 +176,34 @@ static const char *nvmet_trace_fabrics_property_get(struct trace_seq *p,
 	return ret;
 }
 
+static const char *nvmet_trace_fabrics_auth_send(struct trace_seq *p, u8 *spc)
+{
+	const char *ret = trace_seq_buffer_ptr(p);
+	u8 spsp0 = spc[1];
+	u8 spsp1 = spc[2];
+	u8 secp = spc[3];
+	u32 tl = get_unaligned_le32(spc + 4);
+
+	trace_seq_printf(p, "spsp0=%02x, spsp1=%02x, secp=%02x, tl=%u",
+			 spsp0, spsp1, secp, tl);
+	trace_seq_putc(p, 0);
+	return ret;
+}
+
+static const char *nvmet_trace_fabrics_auth_receive(struct trace_seq *p, u8 *spc)
+{
+	const char *ret = trace_seq_buffer_ptr(p);
+	u8 spsp0 = spc[1];
+	u8 spsp1 = spc[2];
+	u8 secp = spc[3];
+	u32 al = get_unaligned_le32(spc + 4);
+
+	trace_seq_printf(p, "spsp0=%02x, spsp1=%02x, secp=%02x, al=%u",
+			 spsp0, spsp1, secp, al);
+	trace_seq_putc(p, 0);
+	return ret;
+}
+
 static const char *nvmet_trace_fabrics_common(struct trace_seq *p, u8 *spc)
 {
 	const char *ret = trace_seq_buffer_ptr(p);
@@ -195,6 +223,10 @@ const char *nvmet_trace_parse_fabrics_cmd(struct trace_seq *p,
 		return nvmet_trace_fabrics_connect(p, spc);
 	case nvme_fabrics_type_property_get:
 		return nvmet_trace_fabrics_property_get(p, spc);
+	case nvme_fabrics_type_auth_send:
+		return nvmet_trace_fabrics_auth_send(p, spc);
+	case nvme_fabrics_type_auth_receive:
+		return nvmet_trace_fabrics_auth_receive(p, spc);
 	default:
 		return nvmet_trace_fabrics_common(p, spc);
 	}