I just ran into the same old problem of how to tell that two databases
are the same given the BackendDB pointer. In back-ldap, a test
op->o_bd->be_private == op->o_conn->c_authz_backend->be_private
is used; unfortunately it fails for me, because
op->o_conn->c_authz_backend was set by do_bind() to the real database's
pointer, while op->o_bd is pointing to an internal instance of back-ldap
that a custm overlay is using for special operations. This destroys
connection caching. I don't want to use temporaries all the way down to
the connection structure just to set that pointer to the right database
before calling the private instance of back-ldap; I'd rather use another
field instead of be_private, which is quite likely to change when using
internal databases in overlays. For instance, if I replace be_private
with be_nsuffix in that test everything works fine, but this would be a
bad hack, since there's no guarantee anybody else needs to change the
suffix between the original and the internal databases, and this would
impact back-ldap's code instead of being confined to the custom code. I
think we should add a unique identifier to the BackendDB structure. Any
suggestions, before I reinvent the wheel?
p.
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