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This will ensure we match LMDB behaviour and avoid a repeat of the per-record locking
issues (compared with full DB locking) we had before Samba 4.7.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
This avoids keeping a counter, which can be error-prone.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
We need to enforce the GUID index mode so end-users do not get a supprise
in mid-operation and we enforce a max key length of 511 so that the
index key trunctation is done correctly.
Otherwise the DB will appear to work until a very long key (DN or index)
is used, after which it will be sad.
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
The re-index traverse can abort part-way though and we need to ensure
that the transaction is never committed as that will leave an un-useable db.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13335
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Thu Mar 8 14:14:37 CET 2018 on sn-devel-144
This allows sharing of the originally ldb_tdb operations to the new
ldb_mdb backend.
Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Tue Mar 6 01:39:16 CET 2018 on sn-devel-144
This can handle both read-only and writable traverses.
Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This will allow us to change the backend from tdb to lmdb.
Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Allow the setting of the maximum key length, this allows the testing of
index key truncation code. Index key truncation is required to allow
the samba indexing scheme to be used with backends that enforce a
maximum key length.
This will allow emulation of a length-limited key DB for testing.
This is a testing-only feature, as the index format changes
based on this value.
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This should ensure that the upper or lower case the user chooses does not impact
on the filtering, at least for database that have checkBaseOnSearch set.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
This connects the GUID based index records to GUID based TDB keys.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
This will allow a common point to parse index records into a TDB key,
allowing them to be a GUID or DN in the future
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
When we have the full ldb_message we can read the objectGUID as the TDB key
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
This allows the optional use of GUID based TDB key.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
This follows modern Samba coding style where memory
returned is allocated on a supplied memory context.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
This allows us to format the TDB key as DN=GUID=f7c953ee-cf9c-433f-b423-21ce04d09591
and so be compatible with an un-indexed search and a re-index with an old ldb.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
This will allow use of a GUID TDB key in the future. While ltdb_search_base()
might be marginally slower than tdb_exists(), no allocation is done for the
attributes or DN, and renmaes are not a very common operation.
This allows a check if the target DN exists even when the direct DN -> key
link is broken.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
This allows the objectGUID, rather than the DN, to be the index key
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
This will make it easier to delete records with the GUID TDB key
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
This would totally break our index scheme if this could be modified.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
This will make it easier to switch the GUID index mode on and off
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
This will in time allow us to generate a TDB key from
the msg, eg from an objectGUID.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
We support opening and LDB multiple times in a process, but do not support this in tdb.
As we can open the ldb with different flags, we must ensure a later read-write
open is possible.
Additionally, a read-only TDB will refuse the all-record lock, preventing
the ldb from even loading.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13033
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
This is a serious condition, and should be logged.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13033
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
The ltdb_lock_read() routine did not return an LDB error code, but -1.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13033
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
If backported, this allows old ldb versions to full-search and re-index newer databases
and in current code allows the transition to and from a GUID or incrementing ID based index
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13016
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
This avoids duplicate code and allows us to use the allocation-avoiding
LDB_UNPACK_DATA_FLAG_NO_DATA_ALLOC flag.
We can not use LDB_UNPACK_DATA_FLAG_NO_VALUES_ALLOC as el2->values
is talloc_realloc()ed in the routine.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Tue Aug 29 11:13:50 CEST 2017 on sn-devel-144
This allows Samba to provide a consistent view of the DB
despite the use of multiple databases via the partitions module
and over multiple callbacks via a module stack.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
If we do not do this, then we never take the all record lock, and instead do a lock
for every record as we go, which is very slow during a large search
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
repl_meta_data knows whether linked attributes are appropriately
[un-]duplicated, and this is how it tells ldb_tdb that.
Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Pair-programmed-with: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
