(ITS#5517) add superclass of existing class fails

[h.b.furuseth@usit.uio.no]

Full_Name: Hallvard B Furuseth
Version: HEAD
OS: Linux
URL: 
Submission from: (NULL) (129.240.6.233)
Submitted by: hallvard


If objectclass B is a subclass of A, and an entry contains objectclass B
but not A, slapd returns attributeOrValueExists to a request to add A.
OTOH it allows replace(objectClass: <A, B>), and after that it allows
delete(objectClass: A).  This is inconsistent.

If the objectClass attribute contains B, does it "really" contain A as
well?  I couldn't find such a statement in the RFCs, so my guess is
that add(objectClass: A) should be allowed.  Though I haven't looked
all that hard.

Example:

ldapadd -cx <<'EOF'
# Create initial object
dn: c=NO
objectClass: friendlyCountry
c: NO
co: Norway

# error
dn: c=NO
changetype: modify
add: objectClass
objectClass: top
-

# error
dn: c=NO
changetype: modify
add: objectClass
objectClass: country
-

# success
dn: c=NO
changetype: modify
replace: objectClass
objectClass: top
objectClass: country
objectClass: friendlyCountry
-

# success
dn: c=NO
changetype: modify
delete: objectClass
objectClass: top
-

# success
dn: c=NO
changetype: modify
delete: objectClass
objectClass: country
-
EOF