Support the grand master settings management query.

This patch also replaces the hard coded logic for the UTC offset and the
time property flags with clock variables. This new clock state will be
used for adjusting the grand master attributes at run time.

Signed-off-by: Richard Cochran <[email protected]>

clock.c

@@ -79,6 +79,8 @@ struct clock {
 	int utc_timescale;
 	int leap_set;
 	int kernel_leap;
+	int utc_offset;  /* grand master role */
+	int time_flags;  /* grand master role */
 	int time_source; /* grand master role */
 	enum servo_state servo_state;
 	tmv_t master_offset;
@@ -172,6 +174,7 @@ static int clock_management_get_response(struct clock *c, struct port *p,
 	struct management_tlv_datum *mtd;
 	struct ptp_message *rsp;
 	struct time_status_np *tsn;
+	struct grandmaster_settings_np *gsn;
 	struct PortIdentity pid = port_identity(p);
 	struct PTPText *text;
 
@@ -271,6 +274,15 @@ static int clock_management_get_response(struct clock *c, struct port *p,
 		datalen = sizeof(*tsn);
 		respond = 1;
 		break;
+	case GRANDMASTER_SETTINGS_NP:
+		gsn = (struct grandmaster_settings_np *) tlv->data;
+		gsn->clockQuality = c->dds.clockQuality;
+		gsn->utc_offset = c->utc_offset;
+		gsn->time_flags = c->time_flags;
+		gsn->time_source = c->time_source;
+		datalen = sizeof(*gsn);
+		respond = 1;
+		break;
 	}
 	if (respond) {
 		if (datalen % 2) {
@@ -431,12 +443,8 @@ static void clock_update_grandmaster(struct clock *c)
 	pds->grandmasterPriority1               = c->dds.priority1;
 	pds->grandmasterPriority2               = c->dds.priority2;
 	c->dad.path_length                      = 0;
-	c->tds.currentUtcOffset                 = CURRENT_UTC_OFFSET;
-	if (c->utc_timescale) {
-		c->tds.flags = 0;
-	} else {
-		c->tds.flags = PTP_TIMESCALE;
-	}
+	c->tds.currentUtcOffset                 = c->utc_offset;
+	c->tds.flags                            = c->time_flags;
 	c->tds.timeSource                       = c->time_source;
 }
 
@@ -571,6 +579,7 @@ struct clock *clock_create(int phc_index, struct interface *iface, int count,
 	c->free_running = dds->free_running;
 	c->freq_est_interval = dds->freq_est_interval;
 	c->kernel_leap = dds->kernel_leap;
+	c->utc_offset = CURRENT_UTC_OFFSET;
 	c->time_source = dds->time_source;
 	c->desc = dds->clock_desc;
 
@@ -598,6 +607,7 @@ struct clock *clock_create(int phc_index, struct interface *iface, int count,
 		sysclk_set_leap(0);
 	}
 	c->leap_set = 0;
+	c->time_flags = c->utc_timescale ? 0 : PTP_TIMESCALE;
 
 	if (c->clkid != CLOCK_INVALID) {
 		fadj = (int) clockadj_get_freq(c->clkid);
@@ -846,6 +856,7 @@ void clock_manage(struct clock *c, struct port *p, struct ptp_message *msg)
 	case TRANSPARENT_CLOCK_DEFAULT_DATA_SET:
 	case PRIMARY_DOMAIN:
 	case TIME_STATUS_NP:
+	case GRANDMASTER_SETTINGS_NP:
 		clock_management_send_error(p, msg, NOT_SUPPORTED);
 		break;
 	default: