[PATCH] Samba 4 fix for bugzilla #4958

[Stefan (metze) Metzmacher]

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> Please find attached an updated patch that addresses the
> case-change-only rename using delete/add.  I have added comments in the
> patch to describe why we do add/delete in some cases and delete/add in
> another, as well as how we could lose data in the delete/add case if the
> delete succeeds and the add fails.  Given what we are trying to
> accomplish, I can't think of any other way to handle this because we
> don't have any transaction semantics available.

When using the ldb_tdb backend we always have a tdb transaction per ldb
call. That means all modules can reply on all changes are applied or
none. While the LDAP backends don't provide transactions.

metze
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