25 	union drbd_state os;  member
280 static void after_state_ch(struct drbd_device *device, union drbd_state os,
285 static enum drbd_state_rv is_valid_transition(union drbd_state os, union drbd_state ns);
286 static union drbd_state sanitize_state(struct drbd_device *device, union drbd_state os,
464  * @os:		old (current) state.
468 			  union drbd_state os, union drbd_state ns)  in cl_wide_st_chg()  argument
470 	return (os.conn >= C_CONNECTED && ns.conn >= C_CONNECTED &&  in cl_wide_st_chg()
471 		 ((os.role != R_PRIMARY && ns.role == R_PRIMARY) ||  in cl_wide_st_chg()
472 		  (os.conn != C_STARTING_SYNC_T && ns.conn == C_STARTING_SYNC_T) ||  in cl_wide_st_chg()
473 		  (os.conn != C_STARTING_SYNC_S && ns.conn == C_STARTING_SYNC_S) ||  in cl_wide_st_chg()
474 		  (os.disk != D_FAILED && ns.disk == D_FAILED))) ||  in cl_wide_st_chg()
475 		(os.conn >= C_CONNECTED && ns.conn == C_DISCONNECTING) ||  in cl_wide_st_chg()
476 		(os.conn == C_CONNECTED && ns.conn == C_VERIFY_S) ||  in cl_wide_st_chg()
477 		(os.conn == C_CONNECTED && ns.conn == C_WF_REPORT_PARAMS);  in cl_wide_st_chg()
481 apply_mask_val(union drbd_state os, union drbd_state mask, union drbd_state val)  in apply_mask_val()  argument
484 	ns.i = (os.i & ~mask.i) | val.i;  in apply_mask_val()
520 	union drbd_state os, ns;  in _req_st_cond()  local
531 	os = drbd_read_state(device);  in _req_st_cond()
532 	ns = sanitize_state(device, os, apply_mask_val(os, mask, val), NULL);  in _req_st_cond()
533 	rv = is_valid_transition(os, ns);  in _req_st_cond()
537 	if (!cl_wide_st_chg(device, os, ns))  in _req_st_cond()
542 			rv = is_valid_soft_transition(os, ns, first_peer_device(device)->connection);  in _req_st_cond()
568 	union drbd_state os, ns;  in drbd_req_state()  local
580 	os = drbd_read_state(device);  in drbd_req_state()
581 	ns = sanitize_state(device, os, apply_mask_val(os, mask, val), NULL);  in drbd_req_state()
582 	rv = is_valid_transition(os, ns);  in drbd_req_state()
588 	if (cl_wide_st_chg(device, os, ns)) {  in drbd_req_state()
591 			rv = is_valid_soft_transition(os, ns, first_peer_device(device)->connection);  in drbd_req_state()
596 				print_st_err(device, os, ns, rv);  in drbd_req_state()
603 				print_st_err(device, os, ns, rv);  in drbd_req_state()
612 				print_st_err(device, os, ns, rv);  in drbd_req_state()
733 void print_st_err(struct drbd_device *device, union drbd_state os,  in print_st_err()  argument
739 	print_st(device, " state", os);  in print_st_err()
743 static long print_state_change(char *pb, union drbd_state os, union drbd_state ns,  in print_state_change()  argument
750 	if (ns.role != os.role && flags & CS_DC_ROLE)  in print_state_change()
752 			       drbd_role_str(os.role),  in print_state_change()
754 	if (ns.peer != os.peer && flags & CS_DC_PEER)  in print_state_change()
756 			       drbd_role_str(os.peer),  in print_state_change()
758 	if (ns.conn != os.conn && flags & CS_DC_CONN)  in print_state_change()
760 			       drbd_conn_str(os.conn),  in print_state_change()
762 	if (ns.disk != os.disk && flags & CS_DC_DISK)  in print_state_change()
764 			       drbd_disk_str(os.disk),  in print_state_change()
766 	if (ns.pdsk != os.pdsk && flags & CS_DC_PDSK)  in print_state_change()
768 			       drbd_disk_str(os.pdsk),  in print_state_change()
774 static void drbd_pr_state_change(struct drbd_device *device, union drbd_state os, union drbd_state …  in drbd_pr_state_change()  argument
780 	pbp += print_state_change(pbp, os, ns, flags ^ CS_DC_MASK);  in drbd_pr_state_change()
782 	if (ns.aftr_isp != os.aftr_isp)  in drbd_pr_state_change()
784 			       os.aftr_isp,  in drbd_pr_state_change()
786 	if (ns.peer_isp != os.peer_isp)  in drbd_pr_state_change()
788 			       os.peer_isp,  in drbd_pr_state_change()
790 	if (ns.user_isp != os.user_isp)  in drbd_pr_state_change()
792 			       os.user_isp,  in drbd_pr_state_change()
799 static void conn_pr_state_change(struct drbd_connection *connection, union drbd_state os, union drb…  in conn_pr_state_change()  argument
805 	pbp += print_state_change(pbp, os, ns, flags);  in conn_pr_state_change()
807 	if (is_susp(ns) != is_susp(os) && flags & CS_DC_SUSP)  in conn_pr_state_change()
809 			       is_susp(os),  in conn_pr_state_change()
907  * @os:		old state.
912 is_valid_soft_transition(union drbd_state os, union drbd_state ns, struct drbd_connection *connecti…  in is_valid_soft_transition()  argument
917 	    os.conn > C_CONNECTED)  in is_valid_soft_transition()
920 	if (ns.conn == C_DISCONNECTING && os.conn == C_STANDALONE)  in is_valid_soft_transition()
923 	if (ns.disk > D_ATTACHING && os.disk == D_DISKLESS)  in is_valid_soft_transition()
926 	if (ns.conn == C_WF_CONNECTION && os.conn < C_UNCONNECTED)  in is_valid_soft_transition()
929 	if (ns.disk == D_OUTDATED && os.disk < D_OUTDATED && os.disk != D_ATTACHING)  in is_valid_soft_transition()
932 	if (ns.conn == C_DISCONNECTING && os.conn == C_UNCONNECTED)  in is_valid_soft_transition()
938 	    !((ns.conn == C_WF_REPORT_PARAMS && os.conn == C_WF_CONNECTION) ||  in is_valid_soft_transition()
939 	      (ns.conn >= C_CONNECTED && os.conn == C_WF_REPORT_PARAMS)))  in is_valid_soft_transition()
945 	if (os.role != R_PRIMARY && ns.role == R_PRIMARY  in is_valid_soft_transition()
948 		&& (ns.conn <= C_WF_SYNC_UUID || ns.conn != os.conn))  in is_valid_soft_transition()
951 	if ((ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) && os.conn < C_CONNECTED)  in is_valid_soft_transition()
955 	    ns.conn != os.conn && os.conn > C_CONNECTED)  in is_valid_soft_transition()
959 	    os.conn < C_CONNECTED)  in is_valid_soft_transition()
963 	    && os.conn < C_WF_REPORT_PARAMS)  in is_valid_soft_transition()
967 	    os.conn < C_CONNECTED && os.pdsk > D_OUTDATED)  in is_valid_soft_transition()
1011  * @os:		old state.
1014 is_valid_transition(union drbd_state os, union drbd_state ns)  in is_valid_transition()  argument
1018 	rv = is_valid_conn_transition(os.conn, ns.conn);  in is_valid_transition()
1021 	if (ns.disk == D_FAILED && os.disk == D_DISKLESS)  in is_valid_transition()
1045  * @os:		old state.
1052 static union drbd_state sanitize_state(struct drbd_device *device, union drbd_state os,  in sanitize_state()  argument
1195 	    !(os.role == R_PRIMARY && os.conn < C_CONNECTED && os.pdsk > D_OUTDATED))  in sanitize_state()
1200 	    !(os.role == R_PRIMARY && os.disk < D_UP_TO_DATE && os.pdsk < D_UP_TO_DATE))  in sanitize_state()
1268 	union drbd_state os;  in _drbd_set_state()  local
1274 	os = drbd_read_state(device);  in _drbd_set_state()
1276 	ns = sanitize_state(device, os, ns, &ssw);  in _drbd_set_state()
1277 	if (ns.i == os.i)  in _drbd_set_state()
1280 	rv = is_valid_transition(os, ns);  in _drbd_set_state()
1293 			if (is_valid_state(device, os) == rv)  in _drbd_set_state()
1294 				rv = is_valid_soft_transition(os, ns, connection);  in _drbd_set_state()
1296 			rv = is_valid_soft_transition(os, ns, connection);  in _drbd_set_state()
1301 			print_st_err(device, os, ns, rv);  in _drbd_set_state()
1307 	drbd_pr_state_change(device, os, ns, flags);  in _drbd_set_state()
1313 		conn_pr_state_change(connection, os, ns,  in _drbd_set_state()
1320 	if ((os.disk != D_FAILED && ns.disk == D_FAILED) ||  in _drbd_set_state()
1321 	    (os.disk != D_DISKLESS && ns.disk == D_DISKLESS))  in _drbd_set_state()
1324 	if (!is_sync_state(os.conn) && is_sync_state(ns.conn))  in _drbd_set_state()
1343 	if (drbd_should_do_remote((union drbd_dev_state)os.i) !=  in _drbd_set_state()
1347 	if (os.disk == D_ATTACHING && ns.disk >= D_NEGOTIATING)  in _drbd_set_state()
1351 	if (os.conn == C_WF_REPORT_PARAMS && ns.conn != C_WF_REPORT_PARAMS &&  in _drbd_set_state()
1363 	if ((os.conn == C_VERIFY_S || os.conn == C_VERIFY_T) &&  in _drbd_set_state()
1372 	if ((os.conn == C_PAUSED_SYNC_T || os.conn == C_PAUSED_SYNC_S) &&  in _drbd_set_state()
1381 	if ((os.conn == C_SYNC_TARGET  || os.conn == C_SYNC_SOURCE) &&  in _drbd_set_state()
1387 	if (os.conn == C_CONNECTED &&  in _drbd_set_state()
1435 		if (os.disk < D_CONSISTENT && ns.disk >= D_CONSISTENT)  in _drbd_set_state()
1441 	if (os.disk == D_INCONSISTENT && os.pdsk == D_INCONSISTENT &&  in _drbd_set_state()
1442 	    os.peer == R_SECONDARY && ns.peer == R_PRIMARY)  in _drbd_set_state()
1446 	if (os.conn != C_DISCONNECTING && ns.conn == C_DISCONNECTING)  in _drbd_set_state()
1450 	if (os.conn != C_STANDALONE && ns.conn == C_STANDALONE)  in _drbd_set_state()
1454 	if (os.conn > C_WF_CONNECTION &&  in _drbd_set_state()
1459 	if (os.conn < C_CONNECTED && ns.conn >= C_CONNECTED) {  in _drbd_set_state()
1467 	if ((os.disk == D_ATTACHING || os.disk == D_NEGOTIATING) &&  in _drbd_set_state()
1473 		ascw->os = os;  in _drbd_set_state()
1495 	after_state_ch(device, ascw->os, ascw->ns, ascw->flags, ascw->state_change);  in w_after_state_ch()
1681 static bool lost_contact_to_peer_data(enum drbd_disk_state os, enum drbd_disk_state ns)  in lost_contact_to_peer_data()  argument
1683 	if ((os >= D_INCONSISTENT && os != D_UNKNOWN && os != D_OUTDATED)  in lost_contact_to_peer_data()
1693 	if (os == D_UNKNOWN  in lost_contact_to_peer_data()
1703  * @os:		old state.
1708 static void after_state_ch(struct drbd_device *device, union drbd_state os,  in after_state_ch()  argument
1720 	sib.os = os;  in after_state_ch()
1723 	if ((os.disk != D_UP_TO_DATE || os.pdsk != D_UP_TO_DATE)  in after_state_ch()
1733 	if (!(os.role == R_PRIMARY && os.disk < D_UP_TO_DATE && os.pdsk < D_UP_TO_DATE) &&  in after_state_ch()
1744 		if (os.conn < C_CONNECTED && conn_lowest_conn(connection) >= C_CONNECTED)  in after_state_ch()
1747 		if ((os.disk == D_ATTACHING || os.disk == D_NEGOTIATING) &&  in after_state_ch()
1792 	if ((os.conn != C_SYNC_SOURCE && os.conn != C_PAUSED_SYNC_S) &&  in after_state_ch()
1800 	if (os.pdsk == D_DISKLESS &&  in after_state_ch()
1815 	if (os.conn != C_WF_BITMAP_S && ns.conn == C_WF_BITMAP_S &&  in after_state_ch()
1822 	if (lost_contact_to_peer_data(os.pdsk, ns.pdsk)) {  in after_state_ch()
1838 		if (os.peer != R_PRIMARY && ns.peer == R_PRIMARY &&  in after_state_ch()
1844 		if (os.peer == R_PRIMARY && ns.peer == R_SECONDARY)  in after_state_ch()
1856 	if (os.role == R_PRIMARY && ns.role == R_SECONDARY &&  in after_state_ch()
1867 	    os.disk == D_ATTACHING && ns.disk == D_NEGOTIATING) {  in after_state_ch()
1875 	     ((os.aftr_isp != ns.aftr_isp) ||  in after_state_ch()
1876 	      (os.user_isp != ns.user_isp)))  in after_state_ch()
1880 	if ((!os.aftr_isp && !os.peer_isp && !os.user_isp) &&  in after_state_ch()
1886 	if (os.conn == C_WF_REPORT_PARAMS && ns.conn >= C_CONNECTED)  in after_state_ch()
1889 	if (os.conn != C_AHEAD && ns.conn == C_AHEAD)  in after_state_ch()
1893 	if ((os.conn != C_STARTING_SYNC_T && ns.conn == C_STARTING_SYNC_T) ||  in after_state_ch()
1894 	    (os.conn != C_STARTING_SYNC_S && ns.conn == C_STARTING_SYNC_S))  in after_state_ch()
1903 	if (os.disk != D_FAILED && ns.disk == D_FAILED) {  in after_state_ch()
1964 	if (os.disk != D_DISKLESS && ns.disk == D_DISKLESS) {  in after_state_ch()
1980 	if (os.disk == D_UP_TO_DATE && ns.disk == D_INCONSISTENT && ns.conn >= C_CONNECTED)  in after_state_ch()
1991 	if ((os.conn > C_CONNECTED && ns.conn <= C_CONNECTED) ||  in after_state_ch()
1992 	    (os.peer_isp && !ns.peer_isp) ||  in after_state_ch()
1993 	    (os.user_isp && !ns.user_isp))  in after_state_ch()
1998 	if (os.disk < D_UP_TO_DATE && os.conn >= C_SYNC_SOURCE && ns.conn == C_CONNECTED)  in after_state_ch()
2004 	if (os.conn == C_VERIFY_S && ns.conn == C_CONNECTED  in after_state_ch()
2019 	if ((os.conn > C_CONNECTED && os.conn < C_AHEAD) &&  in after_state_ch()
2030 		if (os.aftr_isp != ns.aftr_isp)  in after_state_ch()
2118 	union drbd_dev_state os, cs = {  in conn_old_common_state()  local
2129 		os = device->state;  in conn_old_common_state()
2132 			cs = os;  in conn_old_common_state()
2137 		if (cs.role != os.role)  in conn_old_common_state()
2140 		if (cs.peer != os.peer)  in conn_old_common_state()
2143 		if (cs.conn != os.conn)  in conn_old_common_state()
2146 		if (cs.disk != os.disk)  in conn_old_common_state()
2149 		if (cs.pdsk != os.pdsk)  in conn_old_common_state()
2164 	union drbd_state ns, os;  in conn_is_valid_transition()  local
2171 		os = drbd_read_state(device);  in conn_is_valid_transition()
2172 		ns = sanitize_state(device, os, apply_mask_val(os, mask, val), NULL);  in conn_is_valid_transition()
2174 		if (flags & CS_IGN_OUTD_FAIL && ns.disk == D_OUTDATED && os.disk < D_OUTDATED)  in conn_is_valid_transition()
2175 			ns.disk = os.disk;  in conn_is_valid_transition()
2177 		if (ns.i == os.i)  in conn_is_valid_transition()
2180 		rv = is_valid_transition(os, ns);  in conn_is_valid_transition()
2185 				if (is_valid_state(device, os) == rv)  in conn_is_valid_transition()
2186 					rv = is_valid_soft_transition(os, ns, connection);  in conn_is_valid_transition()
2188 				rv = is_valid_soft_transition(os, ns, connection);  in conn_is_valid_transition()
2193 				print_st_err(device, os, ns, rv);  in conn_is_valid_transition()
2206 	union drbd_state ns, os, ns_max = { };  in conn_set_state()  local
2232 		os = drbd_read_state(device);  in conn_set_state()
2233 		ns = apply_mask_val(os, mask, val);  in conn_set_state()
2234 		ns = sanitize_state(device, os, ns, NULL);  in conn_set_state()
2236 		if (flags & CS_IGN_OUTD_FAIL && ns.disk == D_OUTDATED && os.disk < D_OUTDATED)  in conn_set_state()
2237 			ns.disk = os.disk;  in conn_set_state()
2299 	union drbd_state ns_max, ns_min, os;  in _conn_request_state()  local
2348 	conn_old_common_state(connection, &os, &flags);  in _conn_request_state()
2351 	conn_pr_state_change(connection, os, ns_max, flags);  in _conn_request_state()
2356 		acscw->oc = os.conn;  in _conn_request_state()