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This replaces ctdb_killtcp(), which did the initialisation inside a
loop. The new logic is inverted, making it more natural.
The variable containing all the state is called "state" in
anticipation of the next commit that will convert this to a tevent_req
computation. This will mean less churn.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
One less use of trbt_tree_t. The code is easier to read and is
significantly smaller.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This and the supporting functions duplicate functionality (parse_ip()
and parse_ip_port()) from common/system_util.c. The old functions
will be removed at a later time.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The current code is ambiguous in its use of src and dst. This allows
new code to use server and client for clarity.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
This reverts commit 19318d2835.
With this commit, a shutdown that occurs while the startup event is
running can cause an abort because the startup callback will try to
decrease the run state from SHUTDOWN to RUNNING.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Some of these are only in a comment but git grep finds them.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Monitoring is skipped when not in run state RUNNING, so remove the
dependency on the monitoring code.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Monitoring can fail during recovery due to databases (e.g. registry)
being unavailable. This has been avoided by explicitly disabling
monitoring around recovery via the START_RECOVERY and END_RECOVERY
controls. With this approach only there is still a window between
enabling recovery mode and START_RECOVERY when monitoring could be
attempted. However, explicitly disabling monitoring is unnecessary
because monitoring is not done when a node is in recovery.
So remove the explicit disable/enable of monitoring and rely on
monitoring being skipped when recovery mode is active.
The only possible change of behaviour with this change is that there
is now a window between setting recovery mode to normal and the
END_RECOVERY control where monitoring is enabled. However, at this
point databases would be available and the "recovered" event will
cancel any in-progress monitoring.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is currently handled by explicitly disabling monitoring in
various places. However, those places shouldn't need to know about
monitoring but it is OK for monitoring to know about global node
states.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
ctdb_ltdb_fetch() only fills in relevant portion of ctdb_ltdb_header
if the record does not exist. This can result in uninitialized writes
to ctdb_rec_buffer.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13029
If a call request for a key (migration request) is in flight, then all
the subsequent call requests for the same key are deferred. In that case,
the data corresponding to key read from the local tdb is useless and there
is no need to keep it around. Once the deferred call is reprocessed,
the data corresponding to that key will be fetched again.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
These test that ctdb_check_unix_socket() is working.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Autobuild-User(master): Martin Schwenke <martins@samba.org>
Autobuild-Date(master): Tue Sep 12 16:14:12 CEST 2017 on sn-devel-144
Generalise command-line parsing, taking hints from old netstat stub,
and use FAKE_NETSTAT_UNIX_LISTEN to specify listening Unix domain
sockets.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This doesn't belong in the monitoring/startup code and it is already
done in the 10.interface "init" event.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Recovery and takeover are run via helper from recovery daemon. While the
helpers are running, it's possible for the current node to lose election.
If that happens, abort the currently running recovery/takeover helper.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13021
Once the recovery starts and databases are frozen, then all the record
access is postponed till the recovery is complete except reading the
database sequence number. Database access for reading sequence number
is done via a control which does not check if the databases are frozen
or not.
If the database is frozen and if the freeze transaction is not started
(this can happen when a node is inactive, or during recovery when the
database is frozen but the transaction has not yet started), then trying
to read sequence number will cause ctdb daemon to deadlock.
Before reading the sequence number, check if the database access is
allowed.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13012
This avoids a potential race where the client is not properly
registered before "ctdb process-exists" is called.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
