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This uses the RELAX control and checking of single valued attributes
in ldb modules to avoid problems with multi-valued links where all
values but one are deleted
The linked_attributes module only has to deal with renames now, as
other linked attribute updates happen in repl_meta_data. This allows
it to be much simpler.
Pair-Programmed-With: Andrew Bartlett <abartlet@samba.org>
This one copes with deleted objects where linked attributes have been
set on the module. We hit this when we do the ldb wipe at the start of
a provision, which trigers linked attribute updates, but for objects
that have disappeared. We need to ensure that the linked attribute
updates only happen on the right object, and if the object gets
re-created (as happens with a provision) then it is not the right
object.
To cope with this we record the GUID of the object when the operation
that triggered the linked attribute update comes in, and then find the
DN by suing that GUID when we apply the change in the prepare commit
hook.
We need to call down to the next transaction function when we finish
in linked_attributes.
This also changes linked_attributes to use the common
dsdb_find_dn_by_guid() function
items are added to the linked attribute list using DLIST_ADD(), which
means to commit them to the database in the same order they came from
the server we need to walk the list backwards when we traverse it
linked attribute changes can come in any order. This means it is
possible for a forward link to come over the wire in DRS before the
target even exists. To make this work this patch changed the linked
attributes module to gather up all the changes it needs to make in a
linked list, then execute the changes in the end_transaction hook for
the module.
During that commit phase we also fix up all the DNs that we got by
searching for their GUID, as the objects may have moved after the
linked attribute was sent, but before the end of the transaction
This means that linked attributes will always have the same case form
as the actaul entry, as we search for that entry. We then also use
the GUID and SID found on that entry to fill in the extended DN on disk.
Andrew Bartlett
Signed-off-by: Stefan Metzmacher <metze@samba.org>
This causes the linked attribute modifies to occour after the original
operation is entered in the transaction (any failure still fails the
lot). This means (I hope) that we can have another module search the
originating record when the backlink is created, filling in the GUID
and SID for the extended DN.
Andrew Bartlett
The ldb_val is length-limited, and while normally NULL terminated,
this avoids the chance that this particular value might not be, as
well as avoiding a cast.
Andrew Bartlett
This bug occours frequenetly in ldb users because the union so happens
to be layed out that this works. However, it is still incorrect
usage...
Andrew Bartlett
Windows 2003 has a broken schema where the definition of msDS-IsDomainFor
is missing (which is supposed to be the backlink of the msDS-HasDomainNCs
attribute.
Our schema is extracted from windows 2003, so we have the problem.
As the NET-API-BECOME-DC test triggers this bug, windows 2003
seems to just skip creating a backlink.
metze
This is a partial fix towards bugs due to us walking past the end of
what we think are strings in ldb. There is much more work to do in
this area.
Andrew Bartlett
(This used to be commit 5805a9a8f35fd90fa4f718f73534817fa3bbdfd2)
This passes down the timeout more consistantly, and ensures that no
matter how the modules screw up, we don't free() the memory we are
going to write into the ASN1 packet until we actually write it out.
Andrew Bartlett
(This used to be commit eefd46289b90967ce6b4cd385fb1f7e1d6f9b343)
This moves to a smarter 'find the delta' based operation of the linked
attributes module, when the caller asks for a 'replace' of the link
source. Previously we would spray operations all over the database,
even if the net result was just to modify one record.
This also means we need the transaction safety less, which may be
useful for some LDAP backends that don't provide this functionality on
the LDAP server.
Andrew Bartlett
(This used to be commit 8c88e4eb1c0a606e7899091525260e8d6558ffd0)
A re-arrangment of the code due to the base DN checking meant that the
ac->down_req array wasn't started, so was NULL
Andrew Bartlett
(This used to be commit 0a44b8e9f3e1a85c27d105cdd1572a0df936f612)
of Base DNs in searches (returning an error of LDB_ERR_NO_SUCH_ENTRY).
We need to handle this if ldb_tdb is to behave correctly compared with
LDAP, as well as if we are using an LDAP backend.
In doing so, I realised that subtree_rename and subtree_delete
(prevention) need rather different wait loops, so it seemed easier to
split it out into it's own module.
I've fixed the licence on both of these modules to be GPLv3.
Andrew Bartlett
(This used to be commit d3894c90f31fb45e038ab478cd9d7d34962d069b)
invalid entries with a linked attribute.
Make Samba4 pass that test, by fixing a silly bug in the
linked_attributes module. (By passing down the 'original' request
structure, tdb would override our handle, and therefore we would never
be called for the 'wait', which collects the errors).
Fix up the provision templates to handle the newly required
referential integrity.
Andrew Bartlett
(This used to be commit 0377d85bbdcb2c4f110b0519005f0d1d10bc0c0b)
linked_attributs code.
This drasticly reduces the code duplication here.
Andrew Bartlett
(This used to be commit c66e188e6729a8e12854017d62067b4ae4a23af8)
Much more work is still required here, particularly to handle this
better during the provision, and to handle modifies and deletes, but
this is a start.
Andrew Bartlett
(This used to be commit 2ba99d58e9fe1f8e4b15a58a2fdfce6e876f99b4)
