improve tracking of maxxfuid

do it when the corresponding expiration events are logged/replayed.
that makes it unnecessary to log it separately just to make the
autotest happy.

src/sync.c

@@ -932,7 +932,6 @@ box_loaded( int sts, message_t *msgs, int total_msgs, int recent_msgs, void *aux
 
 	svars->oldmaxuid[F] = svars->maxuid[F];
 	svars->oldmaxuid[N] = svars->maxuid[N];
-	svars->oldmaxxfuid = svars->maxxfuid;
 
 	info( "Synchronizing...\n" );
 	for (t = 0; t < 2; t++)
@@ -1201,8 +1200,6 @@ box_loaded( int sts, message_t *msgs, int total_msgs, int recent_msgs, void *aux
 					/* The message is excess or was already (being) expired. */
 					srec->status |= S_NEXPIRE;
 					debug( "  pair(%u,%u) expired\n", srec->uid[F], srec->uid[N] );
-					if (svars->maxxfuid < srec->uid[F])
-						svars->maxxfuid = srec->uid[F];
 					todel--;
 				}
 			}
@@ -1505,6 +1502,8 @@ flags_set_p2( sync_vars_t *svars, sync_rec_t *srec, int t )
 		if (t == N) {
 			uchar nex = (srec->status / S_NEXPIRE) & 1;
 			if (nex != ((srec->status / S_EXPIRED) & 1)) {
+				if (nex && svars->maxxfuid < srec->uid[F])
+					svars->maxxfuid = srec->uid[F];
 				srec->status = (srec->status & ~S_EXPIRED) | (nex * S_EXPIRED);
 				JLOG( "~ %u %u %d", (srec->uid[F], srec->uid[N], srec->status & S_LOGGED),
 				      "expired %d - commit", nex );
@@ -1728,12 +1727,6 @@ box_closed_p2( sync_vars_t *svars, int t )
 		}
 	}
 
-	// This is just an optimization, so it needs no journaling of intermediate states.
-	// However, doing it before the entry purge would require ensuring that the
-	// exception list includes all relevant messages.
-	if (svars->maxxfuid != svars->oldmaxxfuid)
-		JLOG( "! %u", svars->maxxfuid, "max expired UID on far side" );
-
 	save_state( svars );
 
 	sync_bail( svars );

src/sync_p.h

@@ -61,7 +61,6 @@ typedef struct {
 	uint newuidval[2];  // UID validity obtained from driver
 	uint finduid[2];    // TUID lookup makes sense only for UIDs >= this
 	uint maxxfuid;      // highest expired UID on far side
-	uint oldmaxxfuid;   // highest expired UID on far side before this run
 	uchar good_flags[2], bad_flags[2];
 } sync_vars_t;
 

src/sync_state.c

@@ -286,9 +286,6 @@ load_state( sync_vars_t *svars )
 					tn = 0;
 					bad = (sscanf( buf + 2, "%u %u %n", &t1, &t2, &tn ) < 2) || !tn || (ll - (uint)tn != TUIDL + 2);
 					break;
-				case '!':
-					bad = sscanf( buf + 2, "%u", &t1 ) != 1;
-					break;
 				case 'N':
 				case 'F':
 				case 'T':
@@ -324,8 +321,6 @@ load_state( sync_vars_t *svars )
 					svars->finduid[t1] = t2;
 				} else if (c == 'T') {
 					*uint_array_append( &svars->trashed_msgs[t1] ) = t2;
-				} else if (c == '!') {
-					svars->maxxfuid = t1;
 				} else if (c == '|') {
 					svars->uidval[F] = t1;
 					svars->uidval[N] = t2;
@@ -387,6 +382,8 @@ load_state( sync_vars_t *svars )
 						break;
 					case '~':
 						srec->status = (srec->status & ~S_LOGGED) | t3;
+						if ((srec->status & S_EXPIRED) && svars->maxxfuid < srec->uid[F])
+							svars->maxxfuid = srec->uid[F];
 						debug( "status now %#x\n", srec->status );
 						break;
 					case '_':