ITS#9295 Handle add+delete on a single-value attr

servers/slapd/syncrepl.c

@@ -2296,9 +2296,16 @@ syncrepl_accesslog_mods(
 			mod->sml_nvalues = NULL;
 			mod->sml_numvals = 0;
 
-			/* Keep 'op' to reflect what we read out from accesslog */
-			if ( op == LDAP_MOD_ADD && is_at_single_value( ad->ad_type ))
-				mod->sml_op = LDAP_MOD_REPLACE;
+			if ( is_at_single_value( ad->ad_type ) ) {
+				if ( op == LDAP_MOD_ADD ) {
+					/* ITS#9295 an ADD might conflict with an existing value */
+					mod->sml_op = LDAP_MOD_REPLACE;
+				} else if ( op == LDAP_MOD_DELETE ) {
+					/* ITS#9295 the above REPLACE could invalidate subsequent
+					 * DELETEs */
+					mod->sml_op = SLAP_MOD_SOFTDEL;
+				}
+			}
 
 			*modtail = mod;
 			modtail = &mod->sml_next;
@@ -2556,6 +2563,7 @@ syncrepl_resolve_cb( Operation *op, SlapReply *rs )
 						continue;
 					}
 					if ( m2->sml_op == LDAP_MOD_DELETE ||
+						m2->sml_op == SLAP_MOD_SOFTDEL ||
 						m2->sml_op == LDAP_MOD_REPLACE ) {
 						int numvals = m2->sml_numvals;
 						if ( m2->sml_op == LDAP_MOD_REPLACE )
@@ -2567,7 +2575,8 @@ drop:
 							op->o_tmpfree( m1, op->o_tmpmemctx );
 							continue;
 						}
-						if ( m1->sml_op == LDAP_MOD_DELETE ) {
+						if ( m1->sml_op == LDAP_MOD_DELETE ||
+							m1->sml_op == SLAP_MOD_SOFTDEL ) {
 							if ( m1->sml_numvals == 0 ) {
 								/* turn this to SOFTDEL later */
 								m1->sml_flags = SLAP_MOD_INTERNAL;

tests/scripts/test043-delta-syncrepl

@@ -177,6 +177,17 @@ sn: Jones
 -
 add: sn
 sn: Jones
+-
+add: displayName
+displayName: The one
+
+dn: cn=James A Jones 1, ou=Alumni Association, ou=People, dc=example,dc=com
+changetype: modify
+add: displayName
+displayName: James the First
+-
+delete: displayName
+displayName: The one
 
 dn: cn=Bjorn Jensen, ou=Information Technology Division, ou=People, dc=example,dc=com
 changetype: modify

tests/scripts/test063-delta-multiprovider

@@ -307,7 +307,9 @@ n=`expr $n + 1`
 done
 
 echo "Using ldapadd to populate server 2..."
-$LDAPADD -D "$MANAGERDN" -H $URI2 -w $PASSWD -f $LDIFADD1 \
+cp $LDIFADD1 $TESTDIR/add.ldif
+echo "displayName: The other" >>$TESTDIR/add.ldif
+$LDAPADD -D "$MANAGERDN" -H $URI2 -w $PASSWD -f $TESTDIR/add.ldif \
 	>> $TESTOUT 2>&1
 RC=$?
 if test $RC != 0 ; then
@@ -397,6 +399,12 @@ dn: $THEDN
 changetype: modify
 add: description
 description: Amazing
+-
+add: displayName
+displayName: James the Second
+-
+delete: displayName
+displayName: The other
 
 EOF
 RC=$?
@@ -414,6 +422,12 @@ replace: employeetype
 -
 add: description
 description: Stupendous
+-
+add: displayName
+displayName: James II
+-
+delete: displayName
+displayName: The other
 
 EOF
 RC=$?