samba.git/lib/tdb/common, branch master

tdb: allow transactions on on tdb's with TDB_MUTEX_LOCKING

2014-12-19T08:20:06+00:00

There's no real reason to disallow transactions as the
allrecord lock is also available with mutexes enabled.

E.g. ctdbd requires transactions also on non-persistent databases
opened with TDB_CLEAR_IF_FIRST and TDB_MUTEX_LOCKING.

Bug: https://bugzilla.samba.org/show_bug.cgi?id=11004

Signed-off-by: Stefan Metzmacher 
Reviewed-by: Amitay Isaacs

tdb: Fix tdb_runtime_check_for_robust_mutexes()

2014-11-26T15:43:04+00:00

When using exit() instead of _exit(), the child will flush buffered stdout
(and other stdio) content that it inherited from the parent process. In
make test, this led to duplicate output from net registry which then
confused the blackbox selftest.

Signed-off-by: Volker Lendecke 
Reviewed-by: Stefan Metzmacher

tdb: allow tdb_open_ex() with O_RDONLY of TDB_FEATURE_FLAG_MUTEX tdbs.

2014-11-20T15:23:05+00:00

Bug: https://bugzilla.samba.org/show_bug.cgi?id=10781

Signed-off-by: Stefan Metzmacher 
Reviewed-by: Michael Adam

tdb: Fix a comment

2014-09-30T21:08:07+00:00

Signed-off-by: Volker Lendecke 
Reviewed-by: Jeremy Allison 

Autobuild-User(master): Jeremy Allison 
Autobuild-Date(master): Tue Sep 30 23:08:07 CEST 2014 on sn-devel-104

tdb: Improve wording in a comment

2014-09-24T22:59:16+00:00

Signed-off-by: Volker Lendecke 
Reviewed-by: Jeremy Allison 

Autobuild-User(master): Jeremy Allison 
Autobuild-Date(master): Thu Sep 25 00:59:16 CEST 2014 on sn-devel-104

tdb: defragment the freelist in tdb_allocate_from_freelist()

2014-06-26T10:16:03+00:00

While we are traversing the freelist anyways, merge a record
with the left if it is also a free list record.

That partially makes up for the fragmentation introduced by
the lack of merging with right records in tdb_free().

Note there is a potential slight downside:
If the left record we merge the current record into was earlier
in the chain and has hence already been met in traverse,
then we can not use the enlarged record even if it might be
a new best fit.

Signed-off-by: Michael Adam 
Reviewed-by: Volker Lendecke 

Autobuild-User(master): Volker Lendecke 
Autobuild-Date(master): Thu Jun 26 12:16:03 CEST 2014 on sn-devel-104

tdb: use tdb_freelist_merge_adjacent in tdb_freelist_size()

2014-06-26T08:00:11+00:00

So that we automatically defragment the free list when freelist_size is called
(unless the database is read only).

Signed-off-by: Michael Adam 
Reviewed-by: Volker Lendecke

tdb: add tdb_freelist_merge_adjacent()

2014-06-26T08:00:11+00:00

This is intended to be called to reduce the fragmentation in the
freelist. This is to make up the deficiency of the freelist
to be not doubly linked. If the freelist were doubly linked,
we could easily avoid the creation of adjacent freelist entries.
But with the current singly linked list, it is only possible
to cheaply merge a new free record into a freelist entry on the left,
not on the right...

This can be called periodically, e.g. in the vacuuming process
of a ctdb cluster.

Signed-off-by: Michael Adam 
Reviewed-by: Volker Lendecke

tdb: add utility function check_merge_ptr_with_left_record()

2014-06-26T08:00:11+00:00

Variant of check_merge_with_left_record() that reads the record
itself if necessary.

Signed-off-by: Michael Adam 
Reviewed-by: Volker Lendecke

tdb: simplify tdb_free() using check_merge_with_left_record()

2014-06-26T08:00:11+00:00

Signed-off-by: Michael Adam 
Reviewed-by: Volker Lendecke