36 	union drbd_state os;  member
52 static void after_state_ch(struct drbd_device *device, union drbd_state os,
56 static enum drbd_state_rv is_valid_transition(union drbd_state os, union drbd_state ns);
57 static union drbd_state sanitize_state(struct drbd_device *device, union drbd_state os,
238 			  union drbd_state os, union drbd_state ns)  in cl_wide_st_chg()  argument
240 	return (os.conn >= C_CONNECTED && ns.conn >= C_CONNECTED &&  in cl_wide_st_chg()
241 		 ((os.role != R_PRIMARY && ns.role == R_PRIMARY) ||  in cl_wide_st_chg()
242 		  (os.conn != C_STARTING_SYNC_T && ns.conn == C_STARTING_SYNC_T) ||  in cl_wide_st_chg()
243 		  (os.conn != C_STARTING_SYNC_S && ns.conn == C_STARTING_SYNC_S) ||  in cl_wide_st_chg()
244 		  (os.disk != D_FAILED && ns.disk == D_FAILED))) ||  in cl_wide_st_chg()
245 		(os.conn >= C_CONNECTED && ns.conn == C_DISCONNECTING) ||  in cl_wide_st_chg()
246 		(os.conn == C_CONNECTED && ns.conn == C_VERIFY_S) ||  in cl_wide_st_chg()
247 		(os.conn == C_CONNECTED && ns.conn == C_WF_REPORT_PARAMS);  in cl_wide_st_chg()
251 apply_mask_val(union drbd_state os, union drbd_state mask, union drbd_state val)  in apply_mask_val()  argument
254 	ns.i = (os.i & ~mask.i) | val.i;  in apply_mask_val()
290 	union drbd_state os, ns;  in _req_st_cond()  local
301 	os = drbd_read_state(device);  in _req_st_cond()
302 	ns = sanitize_state(device, os, apply_mask_val(os, mask, val), NULL);  in _req_st_cond()
303 	rv = is_valid_transition(os, ns);  in _req_st_cond()
307 	if (!cl_wide_st_chg(device, os, ns))  in _req_st_cond()
312 			rv = is_valid_soft_transition(os, ns, first_peer_device(device)->connection);  in _req_st_cond()
338 	union drbd_state os, ns;  in drbd_req_state()  local
347 	os = drbd_read_state(device);  in drbd_req_state()
348 	ns = sanitize_state(device, os, apply_mask_val(os, mask, val), NULL);  in drbd_req_state()
349 	rv = is_valid_transition(os, ns);  in drbd_req_state()
355 	if (cl_wide_st_chg(device, os, ns)) {  in drbd_req_state()
358 			rv = is_valid_soft_transition(os, ns, first_peer_device(device)->connection);  in drbd_req_state()
363 				print_st_err(device, os, ns, rv);  in drbd_req_state()
370 				print_st_err(device, os, ns, rv);  in drbd_req_state()
379 				print_st_err(device, os, ns, rv);  in drbd_req_state()
459 void print_st_err(struct drbd_device *device, union drbd_state os,  in print_st_err()  argument
465 	print_st(device, " state", os);  in print_st_err()
469 static long print_state_change(char *pb, union drbd_state os, union drbd_state ns,  in print_state_change()  argument
476 	if (ns.role != os.role && flags & CS_DC_ROLE)  in print_state_change()
478 			       drbd_role_str(os.role),  in print_state_change()
480 	if (ns.peer != os.peer && flags & CS_DC_PEER)  in print_state_change()
482 			       drbd_role_str(os.peer),  in print_state_change()
484 	if (ns.conn != os.conn && flags & CS_DC_CONN)  in print_state_change()
486 			       drbd_conn_str(os.conn),  in print_state_change()
488 	if (ns.disk != os.disk && flags & CS_DC_DISK)  in print_state_change()
490 			       drbd_disk_str(os.disk),  in print_state_change()
492 	if (ns.pdsk != os.pdsk && flags & CS_DC_PDSK)  in print_state_change()
494 			       drbd_disk_str(os.pdsk),  in print_state_change()
500 static void drbd_pr_state_change(struct drbd_device *device, union drbd_state os, union drbd_state …  in drbd_pr_state_change()  argument
506 	pbp += print_state_change(pbp, os, ns, flags ^ CS_DC_MASK);  in drbd_pr_state_change()
508 	if (ns.aftr_isp != os.aftr_isp)  in drbd_pr_state_change()
510 			       os.aftr_isp,  in drbd_pr_state_change()
512 	if (ns.peer_isp != os.peer_isp)  in drbd_pr_state_change()
514 			       os.peer_isp,  in drbd_pr_state_change()
516 	if (ns.user_isp != os.user_isp)  in drbd_pr_state_change()
518 			       os.user_isp,  in drbd_pr_state_change()
525 static void conn_pr_state_change(struct drbd_connection *connection, union drbd_state os, union drb…  in conn_pr_state_change()  argument
531 	pbp += print_state_change(pbp, os, ns, flags);  in conn_pr_state_change()
533 	if (is_susp(ns) != is_susp(os) && flags & CS_DC_SUSP)  in conn_pr_state_change()
535 			       is_susp(os),  in conn_pr_state_change()
637 is_valid_soft_transition(union drbd_state os, union drbd_state ns, struct drbd_connection *connecti…  in is_valid_soft_transition()  argument
642 	    os.conn > C_CONNECTED)  in is_valid_soft_transition()
645 	if (ns.conn == C_DISCONNECTING && os.conn == C_STANDALONE)  in is_valid_soft_transition()
648 	if (ns.disk > D_ATTACHING && os.disk == D_DISKLESS)  in is_valid_soft_transition()
651 	if (ns.conn == C_WF_CONNECTION && os.conn < C_UNCONNECTED)  in is_valid_soft_transition()
654 	if (ns.disk == D_OUTDATED && os.disk < D_OUTDATED && os.disk != D_ATTACHING)  in is_valid_soft_transition()
657 	if (ns.conn == C_DISCONNECTING && os.conn == C_UNCONNECTED)  in is_valid_soft_transition()
663 	    !((ns.conn == C_WF_REPORT_PARAMS && os.conn == C_WF_CONNECTION) ||  in is_valid_soft_transition()
664 	      (ns.conn >= C_CONNECTED && os.conn == C_WF_REPORT_PARAMS)))  in is_valid_soft_transition()
667 	if ((ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) && os.conn < C_CONNECTED)  in is_valid_soft_transition()
671 	    ns.conn != os.conn && os.conn > C_CONNECTED)  in is_valid_soft_transition()
675 	    os.conn < C_CONNECTED)  in is_valid_soft_transition()
679 	    && os.conn < C_WF_REPORT_PARAMS)  in is_valid_soft_transition()
683 	    os.conn < C_CONNECTED && os.pdsk > D_OUTDATED)  in is_valid_soft_transition()
730 is_valid_transition(union drbd_state os, union drbd_state ns)  in is_valid_transition()  argument
734 	rv = is_valid_conn_transition(os.conn, ns.conn);  in is_valid_transition()
737 	if (ns.disk == D_FAILED && os.disk == D_DISKLESS)  in is_valid_transition()
768 static union drbd_state sanitize_state(struct drbd_device *device, union drbd_state os,  in sanitize_state()  argument
911 	    !(os.role == R_PRIMARY && os.conn < C_CONNECTED && os.pdsk > D_OUTDATED))  in sanitize_state()
916 	    !(os.role == R_PRIMARY && os.disk < D_UP_TO_DATE && os.pdsk < D_UP_TO_DATE))  in sanitize_state()
982 	union drbd_state os;  in __drbd_set_state()  local
987 	os = drbd_read_state(device);  in __drbd_set_state()
989 	ns = sanitize_state(device, os, ns, &ssw);  in __drbd_set_state()
990 	if (ns.i == os.i)  in __drbd_set_state()
993 	rv = is_valid_transition(os, ns);  in __drbd_set_state()
1006 			if (is_valid_state(device, os) == rv)  in __drbd_set_state()
1007 				rv = is_valid_soft_transition(os, ns, connection);  in __drbd_set_state()
1009 			rv = is_valid_soft_transition(os, ns, connection);  in __drbd_set_state()
1014 			print_st_err(device, os, ns, rv);  in __drbd_set_state()
1020 	drbd_pr_state_change(device, os, ns, flags);  in __drbd_set_state()
1026 		conn_pr_state_change(connection, os, ns,  in __drbd_set_state()
1033 	if ((os.disk != D_FAILED && ns.disk == D_FAILED) ||  in __drbd_set_state()
1034 	    (os.disk != D_DISKLESS && ns.disk == D_DISKLESS))  in __drbd_set_state()
1037 	if (!is_sync_state(os.conn) && is_sync_state(ns.conn))  in __drbd_set_state()
1051 	if (drbd_should_do_remote((union drbd_dev_state)os.i) !=  in __drbd_set_state()
1055 	if (os.disk == D_ATTACHING && ns.disk >= D_NEGOTIATING)  in __drbd_set_state()
1059 	if (os.conn == C_WF_REPORT_PARAMS && ns.conn != C_WF_REPORT_PARAMS &&  in __drbd_set_state()
1071 	if ((os.conn == C_VERIFY_S || os.conn == C_VERIFY_T) &&  in __drbd_set_state()
1080 	if ((os.conn == C_PAUSED_SYNC_T || os.conn == C_PAUSED_SYNC_S) &&  in __drbd_set_state()
1089 	if ((os.conn == C_SYNC_TARGET  || os.conn == C_SYNC_SOURCE) &&  in __drbd_set_state()
1095 	if (os.conn == C_CONNECTED &&  in __drbd_set_state()
1143 		if (os.disk < D_CONSISTENT && ns.disk >= D_CONSISTENT)  in __drbd_set_state()
1149 	if (os.disk == D_INCONSISTENT && os.pdsk == D_INCONSISTENT &&  in __drbd_set_state()
1150 	    os.peer == R_SECONDARY && ns.peer == R_PRIMARY)  in __drbd_set_state()
1154 	if (os.conn != C_DISCONNECTING && ns.conn == C_DISCONNECTING)  in __drbd_set_state()
1158 	if (os.conn != C_STANDALONE && ns.conn == C_STANDALONE)  in __drbd_set_state()
1162 	if (os.conn > C_WF_CONNECTION &&  in __drbd_set_state()
1167 	if (os.conn < C_CONNECTED && ns.conn >= C_CONNECTED) {  in __drbd_set_state()
1175 	if ((os.disk == D_ATTACHING || os.disk == D_NEGOTIATING) &&  in __drbd_set_state()
1181 		ascw->os = os;  in __drbd_set_state()
1202 	after_state_ch(device, ascw->os, ascw->ns, ascw->flags);  in w_after_state_ch()
1255 static void after_state_ch(struct drbd_device *device, union drbd_state os,  in after_state_ch()  argument
1264 	sib.os = os;  in after_state_ch()
1267 	if ((os.disk != D_UP_TO_DATE || os.pdsk != D_UP_TO_DATE)  in after_state_ch()
1277 	if (!(os.role == R_PRIMARY && os.disk < D_UP_TO_DATE && os.pdsk < D_UP_TO_DATE) &&  in after_state_ch()
1288 		if (os.conn < C_CONNECTED && conn_lowest_conn(connection) >= C_CONNECTED)  in after_state_ch()
1291 		if ((os.disk == D_ATTACHING || os.disk == D_NEGOTIATING) &&  in after_state_ch()
1329 	if ((os.conn != C_SYNC_SOURCE && os.conn != C_PAUSED_SYNC_S) &&  in after_state_ch()
1337 	if (os.pdsk == D_DISKLESS &&  in after_state_ch()
1352 	if (os.conn != C_WF_BITMAP_S && ns.conn == C_WF_BITMAP_S &&  in after_state_ch()
1359 	if ((os.pdsk >= D_INCONSISTENT &&  in after_state_ch()
1360 	     os.pdsk != D_UNKNOWN &&  in after_state_ch()
1361 	     os.pdsk != D_OUTDATED)  in after_state_ch()
1380 		if (os.peer == R_SECONDARY && ns.peer == R_PRIMARY &&  in after_state_ch()
1386 		if (os.peer == R_PRIMARY && ns.peer == R_SECONDARY)  in after_state_ch()
1398 	if (os.role == R_PRIMARY && ns.role == R_SECONDARY &&  in after_state_ch()
1409 	    os.disk == D_ATTACHING && ns.disk == D_NEGOTIATING) {  in after_state_ch()
1417 	     ((os.aftr_isp != ns.aftr_isp) ||  in after_state_ch()
1418 	      (os.user_isp != ns.user_isp)))  in after_state_ch()
1422 	if ((!os.aftr_isp && !os.peer_isp && !os.user_isp) &&  in after_state_ch()
1428 	if (os.conn == C_WF_REPORT_PARAMS && ns.conn >= C_CONNECTED)  in after_state_ch()
1431 	if (os.conn != C_AHEAD && ns.conn == C_AHEAD)  in after_state_ch()
1435 	if ((os.conn != C_STARTING_SYNC_T && ns.conn == C_STARTING_SYNC_T) ||  in after_state_ch()
1436 	    (os.conn != C_STARTING_SYNC_S && ns.conn == C_STARTING_SYNC_S))  in after_state_ch()
1444 	if (os.disk != D_FAILED && ns.disk == D_FAILED) {  in after_state_ch()
1501 	if (os.disk != D_DISKLESS && ns.disk == D_DISKLESS) {  in after_state_ch()
1517 	if (os.disk == D_UP_TO_DATE && ns.disk == D_INCONSISTENT && ns.conn >= C_CONNECTED)  in after_state_ch()
1528 	if ((os.conn > C_CONNECTED && ns.conn <= C_CONNECTED) ||  in after_state_ch()
1529 	    (os.peer_isp && !ns.peer_isp) ||  in after_state_ch()
1530 	    (os.user_isp && !ns.user_isp))  in after_state_ch()
1535 	if (os.disk < D_UP_TO_DATE && os.conn >= C_SYNC_SOURCE && ns.conn == C_CONNECTED)  in after_state_ch()
1541 	if (os.conn == C_VERIFY_S && ns.conn == C_CONNECTED  in after_state_ch()
1552 	if (os.conn > C_CONNECTED && ns.conn <= C_CONNECTED && get_ldev(device)) {  in after_state_ch()
1561 		if (os.aftr_isp != ns.aftr_isp)  in after_state_ch()
1641 	union drbd_dev_state os, cs = {  in conn_old_common_state()  local
1652 		os = device->state;  in conn_old_common_state()
1655 			cs = os;  in conn_old_common_state()
1660 		if (cs.role != os.role)  in conn_old_common_state()
1663 		if (cs.peer != os.peer)  in conn_old_common_state()
1666 		if (cs.conn != os.conn)  in conn_old_common_state()
1669 		if (cs.disk != os.disk)  in conn_old_common_state()
1672 		if (cs.pdsk != os.pdsk)  in conn_old_common_state()
1687 	union drbd_state ns, os;  in conn_is_valid_transition()  local
1694 		os = drbd_read_state(device);  in conn_is_valid_transition()
1695 		ns = sanitize_state(device, os, apply_mask_val(os, mask, val), NULL);  in conn_is_valid_transition()
1697 		if (flags & CS_IGN_OUTD_FAIL && ns.disk == D_OUTDATED && os.disk < D_OUTDATED)  in conn_is_valid_transition()
1698 			ns.disk = os.disk;  in conn_is_valid_transition()
1700 		if (ns.i == os.i)  in conn_is_valid_transition()
1703 		rv = is_valid_transition(os, ns);  in conn_is_valid_transition()
1708 				if (is_valid_state(device, os) == rv)  in conn_is_valid_transition()
1709 					rv = is_valid_soft_transition(os, ns, connection);  in conn_is_valid_transition()
1711 				rv = is_valid_soft_transition(os, ns, connection);  in conn_is_valid_transition()
1716 				print_st_err(device, os, ns, rv);  in conn_is_valid_transition()
1729 	union drbd_state ns, os, ns_max = { };  in conn_set_state()  local
1755 		os = drbd_read_state(device);  in conn_set_state()
1756 		ns = apply_mask_val(os, mask, val);  in conn_set_state()
1757 		ns = sanitize_state(device, os, ns, NULL);  in conn_set_state()
1759 		if (flags & CS_IGN_OUTD_FAIL && ns.disk == D_OUTDATED && os.disk < D_OUTDATED)  in conn_set_state()
1760 			ns.disk = os.disk;  in conn_set_state()
1824 	union drbd_state ns_max, ns_min, os;  in _conn_request_state()  local
1871 	conn_old_common_state(connection, &os, &flags);  in _conn_request_state()
1874 	conn_pr_state_change(connection, os, ns_max, flags);  in _conn_request_state()
1878 		acscw->oc = os.conn;  in _conn_request_state()