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Commit Graph

1061 Commits

Author SHA1 Message Date
Amitay Isaacs
2fdb332fad ctdb-daemon: Stop using tevent compatibility definitions
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-10-30 02:00:27 +01:00
Amitay Isaacs
7084cb92e2 ctdb-include: Move include/internal/cmdline.h to common/
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-10-30 02:00:27 +01:00
Amitay Isaacs
b900adc55c ctdb-daemon: Separate prototypes for system specific functions
This groups function prototypes for system specific functions in
common/system.h and removes them from ctdb_private.h.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-10-30 02:00:27 +01:00
Amitay Isaacs
f33e618879 ctdb-include: Remove unused header file include/ctdb_typesafe_cb.h
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>
Reviewed-by: Martin Schwenke <martin@meltin.net>

Autobuild-User(master): Michael Adam <obnox@samba.org>
Autobuild-Date(master): Wed Oct 28 15:59:02 CET 2015 on sn-devel-104
2015-10-28 15:59:02 +01:00
Amitay Isaacs
20b82ea28e ctdb-include: Remove unused header file include/ctdb.h
This was part of libctdb which has been removed.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-10-28 12:53:15 +01:00
Amitay Isaacs
151a7dabd5 ctdb-build: Define CTDB_SOCKET at configure time
Currently only Samba is built with CTDB and since CTDB headers are not
public any more, no other application can build with CTDB.  So define
CTDB_SOCKET only during build.

In future CTDB will have public API and proper way of figuring out
CTDB_SOCKET.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-10-27 04:15:15 +01:00
Amitay Isaacs
af99846ac5 ctdb-tool: Remove repack command
The databases are repacked automatically during vacuuming when the
freelist size grows beyond configured threshold (RepackLimit).

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-10-27 04:15:15 +01:00
Martin Schwenke
dfc84fdd45 ctdb-daemon: Change handling of default capabilities
Centrally define all the default capabilities to make the defaults
crystal clear.  Capability-related command-line options now have a
direct correspondence rather than a reverse correspondence.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Michael Adam <obnox@samba.org>
2015-10-16 13:35:10 +02:00
Amitay Isaacs
cbfabd8104 ctdb-daemon: Add parallel database recovery capability
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-10-07 14:53:29 +02:00
Amitay Isaacs
f0613ac4f7 ctdb-daemon: Use a define for default capabilities
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-10-07 14:53:29 +02:00
Amitay Isaacs
8b45badfda ctdb-include: Remove unused structure definitions
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-10-07 14:53:29 +02:00
Amitay Isaacs
606b909310 ctdb-build: Placeholder for public headers from lib/util
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-10-07 14:53:28 +02:00
Amitay Isaacs
b25c1135a7 ctdb-daemon: Use reqid abstraction
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-10-07 14:53:28 +02:00
Amitay Isaacs
a7ea6b094e ctdb-include: Remove unused definition
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-10-07 14:53:28 +02:00
Amitay Isaacs
62f1e2579a ctdb-daemon: Replace ctdb_message with srvid abstraction
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-10-07 14:53:28 +02:00
Amitay Isaacs
ba56d852cb ctdb-daemon: Remove ctdb from traverse_callback
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-10-07 14:53:28 +02:00
Amitay Isaacs
1df2594386 ctdb-daemon: Introduce per database generation
The database generation for each database is updated only during recovery.
After recovery is complete the database generation would be the same as
the global generation.

The database generation is required for parallel database recovery.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-10-07 14:53:27 +02:00
Amitay Isaacs
8a5039d963 ctdb-freeze: Make function ctdb_start_freeze static
Since the banning code does not call this function anymore, it can be
made static.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-10-07 14:53:27 +02:00
Amitay Isaacs
3d325e7fa1 ctdb-daemon: Add controls for transactions on a single database
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-10-07 14:53:27 +02:00
Amitay Isaacs
4f155e77a8 ctdb-daemon: Rename ctdb_control_wipe_database to ctdb_control_transdb
The same structure is required in new controls for database transactions.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-10-07 14:53:27 +02:00
Amitay Isaacs
e170bd4f1b ctdb-locking: Add mark/unmark functions for a single database
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-10-07 14:53:27 +02:00
Amitay Isaacs
5447864e5d ctdb-daemon: Add controls to freeze/thaw a single database
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-10-07 14:53:26 +02:00
Amitay Isaacs
056c44fda3 ctdb-freeze: Refactor code to check if databases are frozen
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-10-07 14:53:26 +02:00
Amitay Isaacs
6a212d13d0 ctdb-call: Convert pending calls list to per database list
The pending calls are migration requests received from clients (over unix
domain socket) which are under processing.  After a recovery is finished,
any requests which are under processing will be dropped since they do
not belong to the current generation.  All the pending call requests
are resent with new generation to restart record migrations.

This is in preparation for parallel database recovery.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-10-07 14:53:26 +02:00
Amitay Isaacs
fb237608d7 ctdb-locking: Add ctdb_db_iterator to iterate through all databases
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-10-07 14:53:26 +02:00
Amitay Isaacs
ecb858f548 ctdb-locking: Expose ctdb_db_prio_iterator function
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-10-07 14:53:26 +02:00
Michael Adam
4010c03e3d ctdb: improve a misleading help text.
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-09-09 10:12:21 +02:00
Martin Schwenke
bce6a386d3 ctdb-daemon: Drop struct ctdb_control_killtcp
Just use ctdb_tcp_connection.  It is the same.  There are no external
users.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Volker Lendecke <vl@samba.org>
2015-09-07 07:01:13 +02:00
Amitay Isaacs
7949ce103f ctdb-daemon: Reset database statistics when resetting statistics
When the ctdb statistics is reset, reset per database statistics to keep
it consistent with ctdb statistics.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-08-07 05:33:29 +02:00
Amitay Isaacs
d9030d8c10 ctdb-system: Remove unused system specific calls
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-08-07 05:33:29 +02:00
Amitay Isaacs
37e1502f68 ctdb-daemon: Remove control CTDB_CONTROL_SET_CALL
This has not been used for a long time.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>

Autobuild-User(master): Amitay Isaacs <amitay@samba.org>
Autobuild-Date(master): Fri Jul 10 23:41:18 CEST 2015 on sn-devel-104
2015-07-10 23:41:18 +02:00
Martin Schwenke
036c2a9243 ctdb-recoverd: Add new function clear_ip_assignment_tree()
This needs to be cleared to avoid stale data when a new recovery
master is elected.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2015-07-01 04:18:28 +02:00
Günther Deschner
a937590498 ctdb: remove various dead prototypes from the ctdb private header.
Guenther

Signed-off-by: Günther Deschner <gd@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Sat May 30 05:03:59 CEST 2015 on sn-devel-104
2015-05-30 05:03:59 +02:00
Günther Deschner
d53a0112a1 ctdb: remove various dead prototypes from the ctdb client header.
Guenther

Signed-off-by: Günther Deschner <gd@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2015-05-30 02:17:22 +02:00
Amitay Isaacs
9b6865475e ctdb-daemon: Remove obsolete IPv4 only controls
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Jeremy Allison <jra@samba.org>
2015-05-12 01:32:11 +02:00
Amitay Isaacs
4f4e6ebace ctdb-daemon: Remove older data structure that supports only IPv4 addresses
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Jeremy Allison <jra@samba.org>
2015-05-12 01:32:11 +02:00
Martin Schwenke
eb206f5d30 ctdb-daemon: Remove unused capabilities field from struct ctdb_node
Update the ctdb tool test stub code to cope.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2015-05-10 03:22:13 +02:00
Martin Schwenke
7a42bcaeae ctdb-client: Add API for retrieving and checking capabilities
ctdb_get_capabilities() gets capabilities from all connected nodes
into an array.  ctdb_get_node_capabilities() gets capabilities for a
particular node from array.  ctdb_node_has_capabilities() returns true
if given node has all of the given capabilities.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2015-05-10 03:22:13 +02:00
Martin Schwenke
1ef1cfdc4d ctdb-common: Move ctdb_node_list_to_map() to utilities
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2015-04-07 07:43:13 +02:00
Martin Schwenke
ee9619c28b ctdb-recoverd: New message ID CTDB_SRVID_DISABLE_RECOVERIES
Also add test stub support.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2015-04-07 07:43:13 +02:00
Amitay Isaacs
62ba95a9f3 ctdb-daemon: Drop tunable that is no longer in use
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2015-03-27 06:40:08 +01:00
Martin Schwenke
81e526965c ctdb-daemon: New control CTDB_CONTROL_GET_NODES_FILE
This is like CTDB_CONTROL_GET_NODEMAP but it loads from the nodes file
instead of the daemon.

Also new client function ctdb_ctrl_getnodesfile()

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2015-03-23 12:23:12 +01:00
Martin Schwenke
5148228f41 ctdb-daemon: Move ctdb_read_nodes_file() to utilities
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2015-03-23 12:23:12 +01:00
Martin Schwenke
a5be2c245d ctdb-daemon: Store node addresses as ctdb_sock_addr rather than strings
Every time a nodemap is contructed the node IP addresses all need to
be parsed.  This isn't very productive use of CPU.

Instead, parse each string once when the nodes file is loaded.  This
results in much simpler code.

This code also removes the use of ctdb_address.  Duplicating the port
is pointless without an abstraction layer around ctdb_address.  If
CTDB gets an incompatible transport in the future then add an
abstraction layer.

Note that the infiniband code is not updated.  Compilation of the
infiniband code is already broken.  Fixing it will be a separate,
properly tested effort.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>
2015-03-23 12:23:12 +01:00
Martin Schwenke
3cbeb17d0f ctdb-common: Drop ctdb context from ctdb_parse_address()
Having it require a CTDB context stops ctdb_parse_address() from being
used in more generic code.  Just use the existing talloc context for
memory allocations.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2015-03-23 12:23:12 +01:00
Martin Schwenke
89b08c0f0b ctdb-common: New function ctdb_set_helper()
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Volker Lendecke <vl@samba.org>
2015-03-10 15:29:06 +01:00
Martin Schwenke
1d6ed91f55 ctdb-recoverd: Simplify ctdb_recovery_lock()
Have it just silently take or fail to take the lock, except on an
unexpected failure (where it should log an error).

This means that when it is called we need to keep the old behaviour
and explicitly release the lock.  In do_recovery() the lock is
released and a message is printed before attempting to take the lock.
In the daemon sanity check the lock must be released in the error path
if it is actually taken.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2015-02-13 07:19:07 +01:00
Martin Schwenke
db32a2bce5 ctdb-recoverd: New function ctdb_recovery_unlock()
Unlock the recovery lock file.  This way knowledge of the file
descriptor isn't sprinkled throughout the code.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2015-02-13 07:19:07 +01:00
Martin Schwenke
72701be663 ctdb-recoverd: New function ctdb_recovery_have_lock()
True if this recovery daemon holds the lock.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2015-02-13 07:19:07 +01:00
Volker Lendecke
a25e913cf5 ctdb: ctdb_protocol.h references struct sockaddr
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2014-12-07 00:12:07 +01:00
Amitay Isaacs
a0628e317d ctdb-vacuum: Track time for vacuuming in database statistics
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2014-12-05 14:43:07 +01:00
Martin Schwenke
d558281205 ctdb-includes: Reorder includes.h more logically
For now replace.h needs to be before tdb.h, since tdb.h needs
stdbool.h.  This is fixed upstream but not yet in various packaged
versions.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>

Autobuild-User(master): Amitay Isaacs <amitay@samba.org>
Autobuild-Date(master): Fri Oct 31 03:46:40 CET 2014 on sn-devel-104
2014-10-31 03:46:40 +01:00
Martin Schwenke
94f248d1cc ctdb-includes: Remove unused idtree.h
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2014-10-31 01:26:04 +01:00
Martin Schwenke
7fce187a0d ctdb-includes: Clean up includes.h
Remove unused #defines.  CTDB doesn't use these.  _PUBLIC_ is defined
in replace.h anyway.

Remove unnecessary #includes.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2014-10-31 01:26:03 +01:00
Amitay Isaacs
a54db687ac ctdb: Rename CTDB_VERSION to CTDB_PROTOCOL
CTDB_VERSION really is the ctdb protocol version.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>
2014-10-28 05:42:05 +01:00
Amitay Isaacs
0d5ecaa2e3 ctdb: Rename ctdb socket variable from CTDB_PATH to CTDB_SOCKET
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>
2014-10-28 05:42:04 +01:00
Martin Schwenke
1d1cd04cb9 ctdb-logging: New option CTDB_LOGGING, remove CTDB_LOGFILE, CTDB_SYSLOG
Remove --logfile and --syslog daemon options and replace with
--logging.

Modularise and clean up logging initialisation code.  The
initialisation API includes an app_name argument that is currently
unused - this will be used in extensions to the syslog backend.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2014-10-28 05:42:04 +01:00
Martin Schwenke
2974554356 ctdb-logging: Replace logd code with a basic syslog(3) implementation
It is much simpler for most cases to have a syslog backend that
doesn't need a separate CTDB-specific logging daemon.  This loses the
lossy, non-blocking mode provided by logd.  However, a corresponding
feature with a completely different implemention (not requiring an
extra daemon) will be re-added into the syslog backend.  In an ideal
world the new implementation would be added first but unfortunately
that is hard to do because the logd code is hooked in at more than one
place.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2014-10-28 05:42:04 +01:00
Martin Schwenke
739324eead ctdb-logging: Separate out syslog and file logging backends
This makes the code cleaner and allows the syslog backend to be easily
modified without affecting other code.  Also do some extra clean-up,
including whitespace fixups.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2014-10-28 05:42:04 +01:00
Martin Schwenke
a22c8ca056 ctdb-logging: Rework debug level parsing
Put declarations into ctdb_logging.h, factor out some common code,
clean up #includes.

Remove the check so see if the 1st character of the debug level is
'-'.  This is wrong, since it is trying to check for a negative
numeric debug level (which is no longer supported) and would need to
be handled in the else anyway.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2014-10-28 05:42:04 +01:00
Martin Schwenke
d9d572a23c ctdb-logging: Remove ctdb element from struct ctdb_log_state
This is set but otherwise not used.  This allows the 1st argument to
ctdb_set_logfile() to be generalised to a TALLOC_CTX.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2014-10-28 05:42:04 +01:00
Martin Schwenke
dfd502c80c ctdb-logging: Remove log member from struct ctdb_context
This is only used by logging code and there is already a file-level
variable for this.  struct ctdb_context already contains too many
things.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2014-10-28 05:42:04 +01:00
Martin Schwenke
f4fc9a153c ctdb-logging: Remove debug levels DEBUG_ALERT and DEBUG_CRIT
Internally map them to DEBUG_ERR to limit code churn.

This reduces the unwieldy number of debug levels used by CTDB.  ALERT
and CRIT aren't of much use as separate errors, since everything from
ERR up should always be logged.  In future just ERR can be used.

This also improves compatibility with Samba's debug.c system priority
mapping.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2014-10-28 05:42:04 +01:00
Martin Schwenke
0eabbb8c2b ctdb-logging: Remove DEBUG_EMERG
It isn't used and shouldn't be.  CTDB can't make the system unusable.

Update associated test to ensure that EMERG isn't attempted.  Actually
test all remaining debug levels and modernise the test a bit.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2014-10-28 05:42:04 +01:00
Martin Schwenke
88b24858d8 ctdb-build: Fix handling of public headers
Add the header munging, add/package ctdb_version.h, create
directory include/public.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Volker Lendecke <vl@samba.org>

Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Mon Oct  6 14:56:07 CEST 2014 on sn-devel-104
2014-10-06 14:56:06 +02:00
Martin Schwenke
59c3025706 ctdb-build: Change from ctdb-util to samba-util
Remove local lib/util and lib/tdb-wrap. Update wscript, packaging and
includes.h.

The only potentially surprising thing here is a fake samba-util
subsystem that just depends on samba-util-core.  As explained in a
comment:

  When a combined build is implemented, CTDB will wanted to build
  against samba-util rather than samba-util-core.  Similarly, other
  Samba subsystems expect samba-util.  So, for a standalone build,
  just define a fake samba-util subsystem that pulls in
  samba-util-core.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Volker Lendecke <vl@samba.org>
2014-10-06 12:34:33 +02:00
Martin Schwenke
b4589b954e ctdb-logging: Update to use Samba style debug.h/debug.c
Samba's debug subsystem has changed a lot, so CTDB's logging needs
to be rewritten to be compatible.

The new debug.h/debug.c can't just be pulled in because it has some
extra dependencies into Samba's lib/util.  For now, to support the
smallest possible patch, implement a minimal subset of Samba's
debug.[ch] that just supports the DEBUG_CALLBACK logtype.

Define a callback for each logging method.

Check later to see if debug_extra (or similar) can somehow be
implemented using debug classes.

The timestamp on CTDB CLI tool and test program DEBUG() output goes
away, so update the unit test code to cope.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Volker Lendecke <vl@samba.org>
2014-10-06 12:34:33 +02:00
Martin Schwenke
3105737c4b ctdb-logging: Change LogLevel to DEBUGLEVEL
For compatibility with current Samba debug.[ch].

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Volker Lendecke <vl@samba.org>
2014-10-06 12:34:33 +02:00
Martin Schwenke
b544073653 ctdb-logging: Remove log ringbuffer
As far as we know, nobody uses this and it just complicates the
logging subsystem.

Remove all ringbuffer code and documentation.  Update the local
daemons startup code correspondingly.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Volker Lendecke <vl@samba.org>
2014-10-06 12:34:32 +02:00
Martin Schwenke
93423cb1f5 ctdb-logging: Add forward declaration of debug_level
Warnings are currently produced when compiling Samba and
ctdb_private.h is included.  A forward enum declaration avoids the
warning.

This is a temporary measure.  The log ringbuffer should be removed
soon.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>

Autobuild-User(master): Amitay Isaacs <amitay@samba.org>
Autobuild-Date(master): Tue Sep 23 10:31:50 CEST 2014 on sn-devel-104
2014-09-23 10:31:50 +02:00
Amitay Isaacs
d410b20601 ctdb-daemon: Make sure ctdb runs with real-time priority
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2014-09-12 08:46:14 +02:00
Martin Schwenke
9726e17e36 ctdb-includes: Remove some unnecessary declarations
To accommodate removing file_lines_load() from here, drop the #ifdef
around the declaration in util.h.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2014-09-11 03:56:03 +02:00
Martin Schwenke
8b39141c46 ctdb-logging: Move variable debug_extra from debug.*
debug_extra is CTDB-specific.  Moving it will help with the
transitions to Samba's updated debug.[ch].

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2014-09-10 01:36:15 +02:00
Martin Schwenke
97dc127b81 ctdb-logging: Factor out ctdb_logging.h from includes.h
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2014-09-10 01:36:15 +02:00
Martin Schwenke
6e1568149e ctdb-tools: Move definition of timeval_delta() to tools/ctdb.c
This function is only used in this file.  Samba's lib/util doesn't
have timeval_delta(), so staging a clean transition.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2014-09-10 01:36:15 +02:00
Martin Schwenke
a4e76b58a5 ctdb-util: Add extra max_size argument to file_lines_load()
This is part of a migration to Samba's lib/util.  CTDB always passes 0
(i.e. no max_size) so use a simple assert() to enforce this, rather
than changing a lot of code that will be discarded anyway.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2014-09-10 01:36:15 +02:00
Martin Schwenke
cd2b1662a6 ctdb-util: Remove declaration of non-existent ctdb_fault_setup()
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2014-09-10 01:36:14 +02:00
Martin Schwenke
94a5e28ffb ctdb-common: Move hex_decode_talloc() to the lock helper
This is the only place it is used.

After migrating to Samba's lib/util, the lock helper can be changed to
use strhex_to_data_blob().

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2014-09-10 01:36:14 +02:00
Martin Schwenke
a81dccf7ad ctdb-daemon: Move some inline declarations to header file
To avoid warnings when using --enable-developer, which uses
-Wmissing-prototypes.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2014-09-10 01:36:14 +02:00
Martin Schwenke
5de4a97fe9 ctdb-util: Remove util/strlist.c and references to str_util_*()
They're not used in CTDB.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2014-09-10 01:36:14 +02:00
Amitay Isaacs
ef59f2e6bb ctdb-daemon: Defer all calls when processing dmaster packets
When CTDB receives DMASTER_REQUEST or DMASTER_REPLY packet, the specified
record needs to be updated as soon as possible to avoid inconsistent
dmaster information between nodes.  During this time, queue up all calls
for that record and process them only after dmaster request/reply has
been processed.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2014-09-05 07:05:10 +02:00
Amitay Isaacs
bd13389467 ctdb-common: Refactor code to convert TDB_DATA key to aligned uint32 array
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2014-09-05 07:05:10 +02:00
Amitay Isaacs
13d5af48ac ctdb-include: Remove declaration of non-existent function
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2014-09-05 07:05:10 +02:00
Amitay Isaacs
2592ae5a56 ctdb-locking: Remove unused function ctdb_free_lock_request_context
There is no need for a special function to free lock request and
corresponding lock context.  Freeing lock request will free lock
context also.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2014-09-05 07:05:10 +02:00
Amitay Isaacs
374cbc7b0f ctdb-locking: Talloc lock request from client specified context
This makes sure that when the client context is destroyed, the lock
request goes away.  If the lock requests is already scheduled, then the
lock child process will be terminated.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2014-09-05 07:05:10 +02:00
Martin Schwenke
fcd6ee1eac ctdb-common: Copy functions sys_read() and sys_write() from source3
We really should extricate these from source3 and into some common
code.  However, just copy them for now to help get rid of a lot of
warnings.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2014-08-21 04:46:13 +02:00
Amitay Isaacs
88f6a6c188 ctdb-locking: Add per database queues for pending and active lock requests
This avoids traversing a single pending queue which is quite expensive
when there are lots of pending lock requests.  This seems to happen
quite a lot on a loaded cluster for notify_index.tdb.

Adding per database queues avoids the need to traverse pending queue
for that database if there are already the maximum number of active
lock requests.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Volker Lendecke <vl@samba.org>

Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Mon Aug  4 20:23:45 CEST 2014 on sn-devel-104
2014-08-04 20:23:45 +02:00
Amitay Isaacs
3aa96c3a3e ctdb-locking: Remove unused variable lock_num_pending
The number of pending locks displayed in ctdb statistics are stored in
ctdb_statistics structure and not ctdb_context.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Volker Lendecke <vl@samba.org>
2014-08-04 17:59:52 +02:00
Amitay Isaacs
59d45ea307 ctdb-locking: Add new tunable LockProcessesPerDB
This allows to change the maximum number of lock processes that can
be active.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Volker Lendecke <vl@samba.org>
2014-08-04 17:59:52 +02:00
Amitay Isaacs
55fbe364b9 ctdb-daemon: Support per-node robust mutex feature
To enable TDB mutex support, set tunable TDBMutexEnabled=1.

When databases are attached for the first time, attach flags must include
TDB_MUTEX_LOCKING and TDBMutexEnabled must set to enable mutex support.

However, when CTDB attaches databases internally for recovery, it will
enable mutex support if TDBMutexEnabled is set.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Stefan Metzmacher <metze@samba.org>

Autobuild-User(master): Amitay Isaacs <amitay@samba.org>
Autobuild-Date(master): Wed Jul  9 06:45:17 CEST 2014 on sn-devel-104
2014-07-09 06:45:17 +02:00
Amitay Isaacs
2855173dac ctdb-daemon: Do not thaw databases if recovery is active
This prevents ctdb tool from thawing databases prematurely in
thaw/wipedb/restoredb commands if recovery is active.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2014-07-07 13:29:50 +02:00
Martin Schwenke
1677dd499c ctdb-daemon: Remove ctdbd_pid global variable
This duplicates ctdb->ctdbd_pid.

Thanks to Sumit Bose <sbose@redhat.com> for the suggestion.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2014-07-05 06:51:13 +02:00
Michael Adam
fd4bf96378 ctdb:includes: add #ifdef guard for ZERO_STRUCT
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2014-06-20 23:38:10 +02:00
Michael Adam
89dafd1bcd ctdb:includes: add #ifdef guards for _PUBLIC_, _NORETURN_, and _PURE_
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2014-06-20 23:38:10 +02:00
Amitay Isaacs
0a4fc92c77 ctdb-header: Protect against multiple includes
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>
2014-06-20 23:38:09 +02:00
Amitay Isaacs
27d1137e26 ctdb-logging: Split ringbuffer handling code from ctdb_collect_log
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2014-06-12 05:40:10 +02:00
Amitay Isaacs
4736486188 ctdb-daemon: Rename ctdb_mkdir_p_or_die to mkdir_p_or_die
This function does not require ctdb context.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2014-06-12 05:40:10 +02:00
Amitay Isaacs
8c8ef5640e ctdb-daemon: Rename ctdb_lockdown_memory to lockdown_memory
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2014-06-12 05:40:10 +02:00
Amitay Isaacs
22f71579a4 ctdb-daemon: Instead of passing ctdb context, pass valgrinding boolean
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2014-06-12 05:40:10 +02:00
Amitay Isaacs
da1a6a3d31 ctdb-common: Remove unused functions
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2014-06-12 05:40:10 +02:00
Amitay Isaacs
3a9d375328 ctdb-common: Drop ctdb prefix from utility functions independent of ctdb
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2014-06-12 05:40:10 +02:00
Amitay Isaacs
5b580e5d65 ctdb-common: Changing scheduler policy does not require ctdb context
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2014-06-12 05:40:10 +02:00
Amitay Isaacs
19fcf6ff52 ctdb-common: No need to save previous scheduler priority
When calling sched_setscheduler() with SCHED_OTHER, the only valid
priority is 0.  Nice value is "restored" anyway.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2014-06-12 05:40:10 +02:00
Amitay Isaacs
6edbbce887 ctdb-build: Move internal include files in a separate directory
This will allow to build clustered samba with built-in ctdb tree rather
than needing to install CTDB first.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>
2014-05-27 13:43:11 +02:00
Amitay Isaacs
463ea9e525 ctdb-recoverd: Detach database from recovery daemon
As part of vacuuming, recoverd attaches to databases to migrate records.
When detaching a database from main daemon, it should be removed from
recovery daemon also.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>

Autobuild-User(master): Michael Adam <obnox@samba.org>
Autobuild-Date(master): Wed Apr 23 17:05:45 CEST 2014 on sn-devel-104
2014-04-23 17:05:45 +02:00
Amitay Isaacs
ce18b3b00b ctdb-client: Add client code to detach a database
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2014-04-14 03:52:39 +02:00
Amitay Isaacs
1c72842217 ctdb-daemon: Add control CTDB_CONTROL_DB_DETACH
This detaches specified database from all the nodes.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2014-04-14 03:52:39 +02:00
Amitay Isaacs
01de7818de ctdb-daemon: Always update database priority cluster wide
Database priority is a global property and all the nodes should have the
priority set for the databases.  Just setting priority on one node can
lead to problems in the recovery as a database can be frozen at wrong
priority and then freezing database would not succeed.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: David Disseldorp <ddiss@samba.org>

Autobuild-User(master): David Disseldorp <ddiss@samba.org>
Autobuild-Date(master): Mon Apr  7 14:06:26 CEST 2014 on sn-devel-104
2014-04-07 14:06:26 +02:00
Martin Schwenke
9b907536fb ctdb/daemon: Make delete IP wait until the IP is released
reloadips really expects deleted IPs to be released before completing.
Otherwise the recovery daemon starts failing the local IP check.  The
races that follow can cause a node to be banned.

To make the error handling simple, do the actual deletion in
release_ip_callback().

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2014-03-23 04:20:15 +01:00
Amitay Isaacs
cbffbb7c2f ctdb-daemon: Do not run monitor event if any other event is already running
Any currently running monitor events are cancelled if any other events
are scheduled.  However, this does not stop monitor events to be run
when other events are already running.

Keep track of the number of active events and schedule monitor event
only if there are no active events.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2014-01-21 11:30:41 +11:00
Martin Schwenke
e6304d1e1a ctdb/daemon: Untangle serialisation of 1st recovery -> startup -> monitor
At the moment ctdb_check_healthy() is overloaded to wait until the
first recovery is complete, handle the "startup" event and also
actually handle monitoring.  This is untidy and hard to follow.

Instead, have the daemon explicitly wait for 1st recovery after the
"setup" event.  When first recovery is complete, schedule a function
to handle the "startup" event.  When the "startup" event succeeds then
explicitly enable monitoring.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2014-01-17 17:59:41 +11:00
Amitay Isaacs
a92fd11ad1 ctdb-daemon: Remove ctdb_fork_with_logging()
This function has been replaced with ctdb_vfork_with_logging().

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>

Autobuild-User(master): Martin Schwenke <martins@samba.org>
Autobuild-Date(master): Thu Jan 16 04:05:35 CET 2014 on sn-devel-104
2014-01-16 04:05:35 +01:00
Amitay Isaacs
2879404388 ctdb-daemon: Add ctdb_vfork_with_logging()
This will be used to spawn lightweight helper processes to run
eventscripts.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2014-01-16 11:41:12 +11:00
Amitay Isaacs
7aa20ccb5c ctdb-daemon: No need to call event scripts with CTDB_CALLED_BY_USER
This was added to support external monitoring using CTDB event scripts.
However, it was never used.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2014-01-16 11:41:12 +11:00
Amitay Isaacs
bafa467021 ctdb-daemon: Deprecate RELOAD and STATUS events
These events have never been used.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2014-01-16 11:41:12 +11:00
Amitay Isaacs
d21919c8b4 ctdb-common: Refactor code to keep track of child processes
This code can then be used to track child processes created with vfork().

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>
2013-11-27 18:46:16 +01:00
Amitay Isaacs
094f34e9bf ctdb-locking: Implement active lock requests limit per database
This limit was currently a global limit and not per database.  This
prevents any database freeze lock requests from getting scheduled if
the global limit was reached.

Only individual record requests should be limited and database freeze
requests should always get scheduled.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>
2013-11-27 18:46:16 +01:00
Martin Schwenke
e850cddcc4 ctdb-tools/ctdb: New ptrans command
Also add test.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>
2013-11-27 18:46:16 +01:00
Martin Schwenke
028fe930b6 ctdb-recoverd: Fix backward compatibility for CTDB_SRVID_TAKEOVER_RUN
When running a mixed version cluster, compatibility with older
versions was was broken during recent refactorisation.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>
2013-11-27 18:46:16 +01:00
Amitay Isaacs
41d37058ca tunables: Remove obsolete tunables
Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit ca5fc3431573c44d55d09d987c715fb53756fc1f)
2013-10-30 15:37:11 +11:00
Amitay Isaacs
7eb680a95f build: Move the default CTDB socket from /tmp to /var/run/ctdb
Use /var/run/ctdb/ctdbd.socket because there might be other daemons
that need sockets in the future.

The local daemons test code to create a link for the default
convenience socket has to be removed because the link can't be created
as a regular user in the new location.  This should be OK since all
calls to the ctdb tool in the test code should be wrapped in onnode.
When debugging tests, a developer will have to set CTDB_SOCKET by
hand.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Pair-programmed-with: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit dc67a4e24af9d07aead2a1710eeaf5d6cc409201)
2013-10-25 12:06:07 +11:00
Martin Schwenke
b595712f25 ctdbd: Simplify database directory setting logic
No need to check if the options are set.  The options are always set
via static defaults.

No need to talloc_strdup() the values via wrapper functions.  The
options aren't going away.  Remove now unused ctdb_set_tdb_dir() and
similar functions.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 1fe82f3d7b610547ff4945887f15dd6c5798a49b)
2013-10-25 12:06:06 +11:00
Martin Schwenke
bd73e017b0 common: New function ctdb_mkdir_p_or_die()
Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit 7b971df79b0b63f83555205eacf48d49ca3a273a)
2013-10-25 12:06:06 +11:00
Martin Schwenke
c07e3830b3 common: New function mkdir_p()
Behaves like mkdir -p.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit afe2145d91725daf1399f0a24f1cddcf65f0ec31)
2013-10-25 12:06:06 +11:00
Michael Adam
49fcfd2cb3 ctdb_client.h: fix build on AIX by removing C++-style comments
Reported by John P Janosik <jpjanosi@us.ibm.com>

Signed-off-by: Michael Adam <obnox@samba.org>

(This used to be ctdb commit 1f327401f2e181780937aa3f6c479376ff787f3f)
2013-10-23 00:53:56 +02:00
Martin Schwenke
e782b61732 ctdbd: Pass the public address file location in ctdb context
No need to pass it as an extra argument to ctdb_start_daemon.

Also ensure options.public_address_list gets a nice static default.

Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit a3d63a9db89d08bb284b3b3a6db773422f21b477)
2013-10-22 15:37:54 +11:00
Martin Schwenke
4adc8f4f09 ctdbd: Default for event_script_dir should use CTDB_BASE
Also get rid of ctdb_set_event_script_dir().  It creates an
unnecessary copy of something that will be around for the lifetime of
the process.

Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit 21b4d1aba00902f1eee0cbf4f082b0794fd5b738)
2013-10-22 15:37:54 +11:00
Martin Schwenke
f9ce563135 ctdbd: Add nodes_file member to struct ctdb_context
This allows ctdb_load_nodes_file() to move to ctdb_server.c and
ctdb_set_nlist() to become static.

Setting ctdb->nodes_file needs to be done early, before the nodes file
is loaded.  It is now set from CTDB_BASE instead ETCDIR, so setting
CTDB_BASE also needs to be done earlier.

Unhack ctdbd_test.c - it no longer needs to define
ctdb_load_nodes_file().

Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 20e705e63bd3b20837cc3ac92fdcf2a9650ccfc8)
2013-10-22 15:37:54 +11:00
Amitay Isaacs
c5ec04f24e client: Reimplement persistent transaction code using TRANS3_COMMIT
Implementing persistent trasnaction code from Samba.

Persistent transaction code was reimplemented in Samba using g_lock.tdb
to hold transaction locks and using TRANS3_COMMIT control.

Implementation details:

1. When starting a transaction, create a record with "transaction-<dbid>"
   as key and store current server_id in the structure.

2. If a record already exists, some other client has already started a
   transaction.  Verify that the process corresponding to server_id stored
   in the record really exists or it's a stale record and overwrite it.

3. All modifications to the actual persistent database are stored in a
   marshal buffer.

4. When transaction is committed, read the sequence number of the
   persistent database and increment it.  Sequence number record is also
   stored in the marshal buffer.

5. Send the changed records (marshal buffer) in TRANS3_COMMIT control
   to all the active nodes.

6. If all controls succeed, verify that the sequence number has been
   incremented.  Commit is successful.  If any of the controls fail,
   abort the transaction.

7. In case sequence number has not yet been incremented, then database
   recovery has been triggered.  So repeat from step 5.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 4e0f1971792c9431d8d51dc57d54ecc9e4576dd5)
2013-10-04 15:46:15 +10:00
Amitay Isaacs
be33efa3e4 ctdbd: Remove transaction code related to TRANS2 commits
This removes data types and structure elements related to TRANS2
persistent transaction code.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 22a253b7ccf1ff854cddf0b67969dc84d7d6a654)
2013-10-04 15:20:25 +10:00
Amitay Isaacs
91d644325d ctdbd: Deprecate TRANS2 commit controls
Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 7d176352986317e63696d74252ff5d8eccb2fee5)
2013-10-04 15:20:25 +10:00
Amitay Isaacs
fe62936bb6 include: Remove unused set_dmaster structure
Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 2ce3a48cc969d563c26dd295723416c0d7b077a2)
2013-10-04 15:20:25 +10:00
Amitay Isaacs
4ca9b96114 client: Add ctdb_ctrl_getdbseqnum() function
Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 8cb1fbbfe88327c9c7ab68e8eded586dff611e57)
2013-10-04 15:15:34 +10:00
Amitay Isaacs
5d47f28e15 client: Add ctdb_ctrl_getdbstatistics() function
Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 1e7fca5cdc1d7205cf084e35aace1a5dc46ea294)
2013-10-04 15:15:34 +10:00
Amitay Isaacs
105afa543e client: Add ctdb_client_check_message_handlers() function
Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit c9a9d14c91f203ce964a426a8a1e2c1715af2098)
2013-10-04 15:15:34 +10:00
Martin Schwenke
b33ee7a2a4 recoverd: Fix the implementation of CTDB_SRVID_REBALANCE_NODE
The current implementation has a few flaws:

* A takeover run is called unconditionally when the timer goes even if
  the recovery master role has moved.  This means a node other than
  the recovery master can incorrectly do a takeover run.

* The rebalancing target nodes are cleared in the setup for a takeover
  run, regardless of whether the takeover run succeeds.

* The timer to force a rebalance isn't cleared if another takeover run
  occurs before the deadline.  Any forced rebalancing will happen in
  the first takeover run and when the timer expires some time later
  then an unnecessary takeover run will occur.

* If the recovery master role moves then the rebalancing data will
  stay on the original node and affect the next takeover run to occur
  if the recovery master role should come back to the original node.

Instead, store an array of rebalance target nodes in the recovery
master context.  This is passed as an extra argument to
ctdb_takeover_run() each time it is called and is cleared when a
takeover run succeeds.  The timer hangs off the array of rebalance
target nodes, which is cleared if the node isn't the recovery master.

This means that it is possible to lose rebalance data if the recovery
master role moves.  However, that's a difficult problem to solve.  The
best way of approaching it is probably to try to stop the recovery
master role from jumping around unnecesarily when inactive nodes join
the cluster.

The long term solution is to avoid this nonsense completely.  The IP
allocation algorithm needs to cache state between runs so that it
knows which nodes have just become healthy.  This also needs recovery
master stability.

Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit c51c1efe5fc7fa668597f2acd435dee16e410fc9)
2013-09-19 12:54:31 +10:00
Martin Schwenke
1793412de2 recoverd: Remove unused CTDB_SRVID_RELOAD_ALL_IPS and handler
Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit 4cd727439a0824ebb8dbcf737d9888ffc3c41184)
2013-09-19 12:54:31 +10:00
Martin Schwenke
5f0913d321 recoverd: New SRVID message CTDB_SRVID_DISABLE_TAKEOVER_RUNS
This implements a superset of CTDB_SRVID_DISABLE_IP_CHECK.  It stops
the IP checks but also causes any attempted takeover runs to fail and
be rescheduled.

This is meant to completely stop IP movements.

Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit 00db4de53a0d86013e79e6577e7e6cf3ef864e56)
2013-09-19 12:54:31 +10:00
Martin Schwenke
4c3f8dc3bb recoverd: Make the SRVID request structure generic
No need for a separate one for each SRVID.

Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit d9c22b04d5aa7938a3965bd3144568664eb772ce)
2013-09-19 12:54:30 +10:00
Martin Schwenke
fe7f66547b client: Remove unused function list_of_active_nodes_except_pnn()
Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit d8a76cf79f07dfb5a93c6c9a13f16e3268c7dd57)
2013-09-11 15:35:03 +10:00
Martin Schwenke
1ae731198a recoverd: Move struct ctdb_public_ip_list back into ctdb_takeover.c
This is an internal structure.  It was moved into ctdb_private.h a
long time ago to allow unit testing.  Unit test compilation was
changed shortly afterwards to make this unnecessary.

Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit db57261d7dc264e161659a8c547f44fbd9e88eeb)
2013-08-22 17:00:20 +10:00
Amitay Isaacs
1467b666f2 Revert "LACOUNT: Add back lacount mechanism to defer migrating a fetched/read copy until after default of 20 consecutive requests from the same node"
This reverts commit 035c0d981bde8c0eee8b3f24ba8e2dc817e5b504.

This is a premature optimization.  Record can bounce between nodes
very quickly if it is a contended record.  There is no need to hold a
record on a node unnecessarily.  In case record contention becomes bad,
enabling sticky records on a database is a better idea.

Conflicts:
	include/ctdb_private.h
	server/ctdb_tunables.c

Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit ac417b0003f0116f116834ad2ac51482d25cfa0d)
2013-08-22 14:08:52 +10:00
Amitay Isaacs
de6b97ce4f Revert "recoverd: Use correct tdb flags when creating missing databases"
This reverts commit 10a057d8e15c8c18e540598a940d3548c731b0b4.

This approach would not work when creating local databases since currently
there is no control to receive TDB flags for remote databases.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit ca61eb776ab862bd269e45ee0f9f96e7e1e0e001)
2013-08-14 14:15:33 +10:00
Amitay Isaacs
f15e1a28a7 recoverd: Use correct tdb flags when creating missing databases
When creating missing databases either locally or remotely, make sure
to use the correct tdb flags from other nodes.  Without this, volatile
databases can get attached without TDB_INCOMPATIBLE_HASH flag.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 10a057d8e15c8c18e540598a940d3548c731b0b4)
2013-08-01 11:08:25 +10:00
Amitay Isaacs
d8fc36781c ctdbd: Remove incomplete ctdb_db_statistics_wire structure
Instead of maintaining another structure, add an element as place holder for
marshall buffer of hot keys.  This avoids duplication of the structure.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit e73b2e12adc9db1dedb48d32bba3a8406a80f4cd)
2013-07-29 16:00:46 +10:00
Amitay Isaacs
854216236b Revert "ctdbd: Remove incomplete ctdb_db_statistics_wire structure"
The structure cannot be removed without adding support for marshalling keys
for hot records.

This reverts commit 26a4653df594d351ca0dc1bd5f5b2f5b0eb0a9a5.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 023ca2e84f5ed064a288526b9c2bc7e06674dd81)
2013-07-29 16:00:46 +10:00
Amitay Isaacs
500b26e48f common/system: Add ctdb_set_process_name() function
Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit fc3689c977f48d7988eed0654fb8e5ce4b8bfc8b)
2013-07-10 14:33:19 +10:00
Amitay Isaacs
d46c24f4d0 ctdbd: No need for DeadlockTimeout tunable
The code for deadlock detection and killing smbd process causing deadlock
has been removed and replaced with external debug script.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 2211cd94bea266547d3e6f167d3160a6b23bec88)
2013-07-10 14:33:18 +10:00
Amitay Isaacs
d36aa928fd ctdbd: Remove incomplete ctdb_db_statistics_wire structure
Send the ctdb_db_statistics directly instead of first copying it to
duplicate ctdb_db_statistics_wire structure.  This simplifies the
implementation of the control to get database statistics.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 26a4653df594d351ca0dc1bd5f5b2f5b0eb0a9a5)
2013-07-10 14:33:18 +10:00
Martin Schwenke
7290798a41 recoverd: Clean up log messages in remote IP verification
The log messages in verify_remote_ip_allocation() are confusing
because they don't include the PNN of the problem node, because it is
not known in this function.

Add the PNN of the node being verified as a function argument and then
shuffle the log messages around to make them clearer.

Also fold 3 nested if statements into just one.

Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit f0942fa01cd422133fc9398f56b4855397d7bc86)
2013-07-05 15:52:33 +10:00
Martin Schwenke
dbd1759eae util: New function ctdb_die()
This is like ctdb_fatal() but exits cleanly without dumping core or
generating a backtrace.

Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit c0a9456692c88a7a5542cd893d8f326524d3f94e)
2013-07-05 15:52:33 +10:00
Amitay Isaacs
c6914e3891 banning: Make ctdb_local_node_got_banned() a void function
When this function is called, we are already committed to banning
and there is no point in failing this function.  In case, freezing of
databases fails, it will be fixed from recovery daemon.

(This used to be ctdb commit bb178338658b4ae32382a1f62f7c21cee1d4878f)
2013-07-02 12:59:08 +10:00
Amitay Isaacs
622ccd09f9 freeze: Make ctdb_start_freeze() a void function
If this function fails due to memory errors, there is no way to recover.
The best course of action is to abort.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 46efe7a886f8c4c56f19536adc98a73c22db906a)
2013-07-02 12:59:08 +10:00
Martin Schwenke
6a52a87028 ctdbd: Refactor shutdown sequence
Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit b32fd04bfbf33062d45365b37a7247e272a76ceb)
2013-06-22 15:51:02 +10:00
Martin Schwenke
6d9667f01c ctdbd: Add new runstate CTDB_RUNSTATE_FIRST_RECOVERY
This adds more serialisation to the startup, ensuring that the
"startup" event runs after everything to do with the first recovery
(including the "recovered" event).

Given that it now takes longer to get to the "startup" state, the
initscript needs to wait until ctdbd gets to "first_recovery".

Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit ed6814ff0a59ddbb1c1b3128b505380f60d7aeb7)
2013-05-24 14:08:07 +10:00
Martin Schwenke
77671b9ef5 ctdbd: New control CTDB_CONTROL_GET_RUNSTATE
Also new client function ctdb_ctrl_get_runstate().

Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit dc4220e6f618cc688b3ca8e52bcb3eec6cb55bb1)
2013-05-24 14:08:07 +10:00
Martin Schwenke
63577c96db ctdbd: Replace ctdb->done_startup with ctdb->runstate
This allows states, including startup and shutdown states, to be
clearly tracked.  This doesn't include regular runtime "states", which
are handled by node flags.

Introduce new functions ctdb_set_runstate(), runstate_to_string() and
runstate_from_string().

Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 8076773a9924dcf8aff16f7d96b2b9ac383ecc28)
2013-05-24 14:08:06 +10:00
Amitay Isaacs
1ddc7b0d10 locking: Remove functions that are not used anymore
These functions were used in locking child process to do the locking.  With
locking helper, these are not required.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit c660f33c3eaa1b4a2c4e951c1982979e57374ed4)
2013-05-24 09:06:40 +10:00
Martin Schwenke
54e91df60d recoverd: Move IP flags into ctdb_takeover.c
These should never be seen outside the IP allocation code.

Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit e143abd16ccde2e0edfe103673d31a5fb06b6aef)
2013-05-09 12:55:42 +10:00
Martin Schwenke
0445c988e2 recoverd: Fix tunable NoIPTakeoverOnDisabled, rename to NoIPHostOnAllDisabled
This really needs to be per-node.  The rename is because nodes with
this tunable switched on should drop IPs if they become unhealthy (or
disabled in some other way).

* Add new flag NODE_FLAGS_NOIPHOST, only used in recovery daemon.

* Enhance set_ipflags_internal() and set_ipflags() to setup
  NODE_FLAGS_NOIPHOST depending on setting of NoIPHostOnAllDisabled
  and/or whether nodes are disabled/inactive.

* Replace can_node_servce_ip() with functions can_node_host_ip() and
  can_node_takeover_ip().  These functions are the only ones that need
  to look at NODE_FLAGS_NOIPTAKEOVER and NODE_FLAGS_NOIPHOST.  They
  can make the decision without looking at any other flags due to
  previous setup.

* Remove explicit flag checking in IP allocation functions (including
  unassign_unsuitable_ips()) and just call can_node_host_ip() and
  can_node_takeover_ip() as appropriate.

* Update test code to handle CTDB_SET_NoIPHostOnAllDisabled.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 1308a51f73f2e29ba4dbebb6111d9309a89732cc)
2013-05-07 16:20:46 +10:00
Martin Schwenke
fa16cccf02 ctdbd: Remove the "stopped" event
It isn't used, superceded by "ipreallocated".

Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit c2bb8596a8af6406ef50e53953884df9d6246a96)
2013-05-06 13:38:21 +10:00
Martin Schwenke
2e59cd5428 ctdbd: New control CTDB_CONTROL_IPREALLOCATED
This is an alternative to using ctdb_run_eventscripts() that can be
used when in recovery.

Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit 27a44685f0d7a88804b61a1542bb42adc8f88cb1)
2013-05-06 13:38:21 +10:00
Michael Adam
1aa09dd5c3 include: define CTDB_REC_RO_FLAGS - all read-only related record flags
This is used for some checks

Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-By: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit c7924ce6404bb18641b00d5fbd2fe9da9aaf7959)
2013-04-24 18:48:31 +10:00
Michael Adam
527976d02a vacuum: introduce the RECEIVE_RECORDS control
This in preparation of turning the vacuming on the lmaster into
into a two phase process:

- First the node sends the list of records to be vacuumed
  to all other nodes with this new RECEIVE_RECORDS control.
  The remote nodes should store the lmaster's empty current copy.
- Only those records that could be stored on all other nodes
  are processed further. They are send to all other nodes with
  the TRY_DELETE_RECORDS control as before for deletion.

Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-By: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit e397702e271af38204fd99733bbeba7c1db3a999)
2013-04-24 18:47:32 +10:00
Martin Schwenke
7ba42d2c89 util: Removed unused declaration of ctdbd_start()
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Michael Adam <obnox@samba.org>

(This used to be ctdb commit 1e989894764e4cd1d551c44784d91cb295cd790d)
2013-04-18 13:22:12 +10:00
Martin Schwenke
7ccde44d30 include: Move ctdb_start_daemon() from ctdb_client.h to ctdb_private.h
It really is internal.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>

(This used to be ctdb commit abb64f62efaa70df4b87c030b96300eafd98e6a3)
2013-04-18 13:22:12 +10:00
Martin Schwenke
dcf1ac34ab ctdbd: Add --pidfile option
Default is not to create a pid file.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>

(This used to be ctdb commit 996e74d3db0c50f91b320af8ab7c43ea6b1136af)
2013-04-18 13:21:59 +10:00
Martin Schwenke
4ede763f3b util: New functions ctdb_set_child_info() and ctdb_is_child_process()
Must be called by all child processes.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Michael Adam <obnox@samba.org>

(This used to be ctdb commit 59b019a97aad9a731f9080ea5be14d0dbdfe03d6)
2013-04-18 13:18:29 +10:00
Michael Adam
b1a6289b44 ctdbd: unimplement the unused SET_DMASTER control
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 2e92deef5221ee651028ef87138b3113f1fece91)
2013-04-17 12:44:08 +02:00
Amitay Isaacs
9e0f8fa09c traverse: Add CTDB_CONTROL_TRAVERSE_ALL_EXT to support withemptyrecords
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>

(This used to be ctdb commit e691df43d20871468142c8fb83f7c7303c4ec307)
2013-04-17 12:30:59 +02:00
Amitay Isaacs
dd050cd4ba util: Add hex_decode_talloc() to decode hex string into a binary blob
Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 307416afda707b687f5e89e8438e45c154a4c806)
2013-03-25 17:45:23 +11:00
Amitay Isaacs
5d7efb4cf1 ctdbd: Add an index db for message list for faster searches
When CTDB is busy with lots of smbd, CTDB was spending too much time in
daemon_check_srvids() which searches a list of srvids in the registered
message handlers.  Using a hash based index significantly improves the
performance of search in a linked list.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 3e09f25d419635f6dd679b48fa65370f7860be7d)
2013-03-06 15:32:33 +11:00
Martin Schwenke
dab2f6817d client: New generic node listing function list_of_nodes()
Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit a73bb56991b8c07ed0e9517ffcf0dc264be30487)
2013-02-20 14:44:38 +11:00
Martin Schwenke
689384a7b4 Logging: Fix breakage when freeing the log ringbuffer
Commit a82d3ec12f0fda16d6bfa8442a07595de897c10e broke fetching from
the log ringbuffer.  The solution there is still generally good: there
is no need to keep the ringbuffer in children created by
ctdb_fork()... except for those special children that are created to
fetch data from the ringbuffer!

Introduce a new function ctdb_fork_no_free_ringbuffer() that does
everything ctdb_fork() needs to do except free the ringbuffer (i.e. it
is the old ctdb_fork() function).  The new ctdb_fork() function just
calls that function and then frees the ringbuffer in the child.

This means all callers of ctdb_fork() have the convenience of having
the ringbuffer freed.  There are 3 special cases:

* Forking the recovery daemon.  We want to be able to fetch from the
  ringbuffer there.

* The ringbuffer fetching code.  Change the 2 calls in this code (main
  daemon, recovery daemon) to call ctdb_fork_no_free_ringbuffer()
  instead.

While we're here, clear the log ringbuffer when the recovery deamon is
forked, since it will contain a copy of the messages from the main
daemon.

Note to self: always test... even the most obvious patches...  ;-)

Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit 00db5fa00474f8a83f1aa3b603fd756cc9b49ff4)
2013-02-07 11:26:29 +11:00
Martin Schwenke
bc5f0a2b65 ctdbd: Remove command-line option --debug-hung-script
Use an environment variable instead.  This just means that the
initscript exports CTDB_DEBUG_HUNG_SCRIPT and the code checks for the
environment variable.

The justification for this simplification is that more debug options
will be arriving soon and we want to handle them consistently without
needing to add a command-line option for each.  So, the convention
will be to use an environment variable for each debug option.

Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit 0581f9a84e58764d194f4e04064c2c5b393c348b)
2013-02-05 16:05:13 +11:00
Martin Schwenke
f2428cadd8 ctdbd: Remove debug_hung_script_ctx
The only allocation against this context is by
ctdb_fork_with_logging().  This memory is freed by ctdb_log_handler()
anyway.  There should be no memory leak.

Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit 501461cc3e132d4adee9e91b5d4513a26bae2846)
2013-02-05 16:05:13 +11:00
Martin Schwenke
f2ba0e8a65 Logging: New function ctdb_log_ringbuffer_free()
Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit a4f622e85168f59417c11705f1734e0352e1d44a)
2013-02-05 12:40:30 +11:00
Amitay Isaacs
4a6fa39ff9 daemon: Protect against double free of callback state while shutting down
When CTDB is shut down and monitoring has been stopped, monitor_context
gets freed and all the callback states hanging off it.  This includes
callback state for current_monitor, if the current monitor event has
not yet finished.  As a result, when the shutdown event is called,
current_monitor->callback state is not NULL, but it's actually freed
and it's a dangling reference.

So before executing callback function and freeing callback state check
if ctdb->monitor->monitor_context is not NULL.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 7d8546ee4353851f0543d0ca2c4c67cb0cc75aea)
2013-01-09 14:39:23 +11:00
Amitay Isaacs
30299c387f daemon: On shutdown, destroy timed events that check if recoverd is active
When CTDB is shutting down, recovery daemon is stopped, but the
event that checks if recovery daemon is still alive is not destroyed.
So recovery master is restarted during shutdown if CTDB daemon takes
longer to shutdown.

There are two processes that check if recovery daemon is working.

1. ctdb_check_recd() - which checks every 30 seconds if the recovery
   daemon process exists.

2. ctdb_recd_ping_timeout() - which is triggered when recovery daemon
   fails to ping CTDB daemon.

Both the events are periodic and need to be destroyed when shutting down.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 746168df2e691058e601016110fae818c6a265c3)
2013-01-09 13:20:26 +11:00
Martin Schwenke
80a2bb84e7 ctdbd: Remove debug option --node-ip, use --listen instead
This effectively reverts d96cb02c2c24f9eabbc53d3d38e90dea49cff3e0

Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 496387a585b2c5778c808cf02b8e1435abde4c3e)
2013-01-07 10:35:39 +11:00
Amitay Isaacs
a73f13ada7 daemon: Add a tunable to enable automatic database priority setting
Samba versions 3.6.x and older do not set the database priority.
This can cause deadlock between Samba and CTDB since the locking order
of database will be different. A hack was added for automatic promotion
of priority for specific databases to avoid deadlock.  This code should
not be invoked with Samba version 4.x which correctly specifies the
priority for each database.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>

(This used to be ctdb commit 4a9e96ad3d8fc46da1cd44cd82309c1b54301eb7)
2013-01-05 01:14:57 +01:00
Amitay Isaacs
13518b9e33 daemon: Check if log_latency_ms is set before using it
This fixes a bug where wrong variable is checked.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit f81e9add466b1d9b2796c09c6ba63b77296ea149)
2012-11-30 12:21:30 +11:00
Amitay Isaacs
442d9905fe locking: Do not use RECLOCK for tracking DB locks and latencies
RECLOCK is for recovery lock in CTDB. Do not override the meaning for
tracking locks on databases.  Database lock latency has nothing to do
with recovery lock latency.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 54e24a151d2163954e5a2a1c0f41a2b5c19ae44b)
2012-11-14 15:51:59 +11:00
Amitay Isaacs
85c8deca3f recoverd: Track the nodes that fail takeover run and set culprit count
If any of the nodes fail takeover run (either due to timeout or failure
to complete within takeover_timeout interval) from main loop, recovery
master will give up trying takeover run with following message:

  "Unable to setup public takeover addresses. Try again later"

And as a side-effect the monitoring is disabled on all the nodes. Before
ctdb_takeover_run() is called from main loop, monitoring get disabled via
startrecovery event. Since ctdb_takeover_run() fails, it never runs
recovered event and monitoring does not get re-enabled.

In main_loop, ctdb_takeover_run() is called with a takeover_fail_callback.
This callback will get called if any of the nodes fail in handling
takeip/releaseip/ipreallocated events in ctdb_takeover_run().

Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit a5c6bb1fffb8dc3960af113957a1fd080cc7c245)
2012-11-14 10:59:54 +11:00
Martin Schwenke
db5dfe891c recoverd: Add CTDB_SRVID_GETLOG and CTDB_SRVID_CLEARLOG
These support getting and clearing logs from the ring-buffer in the
recovery daemon.

Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit cbca233d1e03b2410e0bb63b936328d4a8b3c7b4)
2012-10-22 11:15:36 +11:00
Amitay Isaacs
bc126ccdd4 build: Set CTDB_PATH to /tmp/ctdb.socket if SOCKPATH is not defined
When building samba with CTDB, if samba configure/waf does not support
setting of SOCKPATH, fallback to /tmp/ctdb.socket.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit a9511cf5ecd5bc39b0070f0afa8ac4d4926c6cab)
2012-10-22 09:01:27 +11:00
David Disseldorp
8cbf1a00c4 Build: Set the default ctdb socket path at configure time
The ctdb socket path currently defaults to /tmp/ctdb.socket and can be
modified at runtime using the --socket=filename option, common to both
ctdb and ctdbd binaries.

This change allows the default path to be set at configure time using
the --with-socketpath=FILE argument. When not specified, the default
path remains /tmp/ctdb.socket, documentation remains unchanged as a
result.

Signed-off-by: David Disseldorp <ddiss@samba.org>

(This used to be ctdb commit f92b9c83a2f39fba9a141417a88de96fc8c592ff)
2012-10-21 01:39:08 +11:00
Amitay Isaacs
a00e50e503 ctdbd: Replace lockwait with locking API and remove ctdb_lockwait.c
Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 2126795153dacb255e441abcb36ee05107b6282a)
2012-10-20 02:48:44 +11:00
Amitay Isaacs
83306337df ctdbd: locking: Provide non-blocking API for locking of TDB record/db/alldb
This introduces a consistent API for handling locks on single record, complete
db or all dbs. The locks are taken out in a child process. In cases of timeout,
find the processes that currently hold the lock and log.

Callback functions for locking requests take locked boolean to indicate
whether the lock was successfully obtained or not.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 1af99cf0de9919dd89af1feab6d1bd18b95d82ff)
2012-10-20 02:48:44 +11:00
Amitay Isaacs
1011d10a51 common: Add routines to get process and lock information
Currently these functions are implemented only for Linux.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit be4051326b0c6a0fd301561af10fd15a0e90023b)
2012-10-20 02:48:44 +11:00
Amitay Isaacs
ef79dc012e header: Added DB statistics update macros
Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit a0cdfae7438092f5c605f0608daa536be860b7fe)
2012-10-20 02:48:44 +11:00
Martin Schwenke
8d7562f3f8 common: Debug ctdb_addr_to_str() using new function ctdb_external_trace()
We've seen this function report "Unknown family, 0" and then CTDB
disappeared without a trace.  If we can reproduce it then this might
help us to debug it.

The idea is that you do something like the following in /etc/sysconfig/ctdb:

  export CTDB_EXTERNAL_TRACE="/etc/ctdb/config/gcore_trace.sh"

When we hit this error than we call out to gcore to get a core file so
we can do forensics.  This might block CTDB for a few seconds.

Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit 7895bc003f087ab2f3181df3c464386f59bfcc39)
2012-10-18 20:05:42 +11:00
Martin Schwenke
4b4e4d8870 ctdbd: Stop takeovers and releases from colliding in mid-air
There's a race here where release and takeover events for an IP can
run at the same time.  For example, a "ctdb deleteip" and a takeover
initiated by the recovery daemon.  The timeline is as follows:

1. The release code registers a callback to update the VNN.  The
   callback is executed *after* the eventscripts run the releaseip
   event.

2. The release code calls the eventscripts for the releaseip event,
   removing IP from its interface.

   The takeover code "updates" the VNN saying that IP is on some
   iface.... even if/though the address is already there.

3. The release callback runs, removing the iface associated with IP in
   the VNN.

   The takeover code calls the eventscripts for the takeip event,
   adding IP to an interface.

As a result, CTDB doesn't think it should be hosting IP but IP is on
an interface.  The recovery daemon fixes this later... but it
shouldn't happen.

This patch can cause some additional noise in the logs:

  Release of IP 10.0.2.133/24 on interface eth2  node:2
  recoverd:We are still serving a public address '10.0.2.133' that we should not be serving. Removing it.
  Release of IP 10.0.2.133/24 rejected update for this IP already in flight
  recoverd:client/ctdb_client.c:2455 ctdb_control for release_ip failed
  recoverd:Failed to release local ip address

In this case the node has started releasing an IP when the recovery
daemon notices the addresses is still hosted and initiates another
release.  This noise is harmless but annoying.

Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit bfe16cf69bf2eee93c0d831f76d88bba0c2b96c2)
2012-10-11 12:10:45 +11:00
Martin Schwenke
79ea15bf96 ctdbd: New tunable NoIPTakeoverOnDisabled
Stops the behaviour where unhealthy nodes can host IPs when there are
no healthy nodes.  Set this to 1 when an immediate complete outage is
preferred when all nodes are unhealthy.  The alternative
(i.e. default) can lead to undefined behaviour when the shared
filesystem is unavailable.

Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit a555940fb5c914b7581667a05153256ad7d17774)
2012-10-11 12:10:45 +11:00
Volker Lendecke
a68512c7d8 Correct include for ctdb_protocol.h
With an old ctdb_protocol.h installed under /usr/local, ctdb will
not compile because the <> form of include will find the header
under /usr/local

(This used to be ctdb commit c4f5a58471b206e2287c7958c7f29c1f1c0626ac)
2012-10-09 23:13:29 +11:00
Martin Schwenke
e05fc0e7b0 libctdb: add ctdb_getcapabilities()
Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit 140fafef23050d40d66f5b5558c7efcb78f80cd2)
2012-09-28 17:05:34 +10:00
Ronnie Sahlberg
d21337a0fb Add new command to find which interface is located on
(This used to be ctdb commit f07376309e70f5ccdb7de8453caacc71b451ab48)
2012-06-20 15:11:49 +10:00
Ronnie Sahlberg
59565c05cf STATISTICS: Add tracking of the 10 hottest keys per database measured in hopcount
and add mechanisms to dump it using the ctdb dbstatistics command

(This used to be ctdb commit 8307c70ed98996b430c470e9641a09fdeeb81bd8)
2012-06-13 16:19:18 +10:00
Amitay Isaacs
7631830152 server: Replace BOOL datatype with bool, True/False with true/false
Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 6e5cbe8fff71985e5a2fc16b7e9f2b868011ff5d)
2012-05-28 11:22:25 +10:00
Ronnie Sahlberg
e7d21834ae RECOVER: When we pull databases during recovery, we used to reallocate the databuffer for each entry added. This would normally not be an issue, but for cases where memory is fragmented, this could start to cost significant cpu if we need to reallocate and move to a different region.
Change this to instead preallocate , by default, 10MByte chunks to the data buffer.
This significantly reduces the number of potential reallocate and move  operations that may be required.

Create a tunable to override/change how much preallocation should be used.

(This used to be ctdb commit 1f262deaad0818f159f9c68330f7fec121679023)
2012-05-25 12:34:06 +10:00
Ronnie Sahlberg
26322d257d DEBUG: Add checks for and print debug messages when 1) a database contains very many records, 2) when a database is very big, 3) when a single record is very big.
Add tunables to control when to log these instances and allow it to be completely turned off by setting the threshold to 0

(This used to be ctdb commit 9ed58fef4991725f75509433496f4d5ffae0ae87)
2012-05-21 13:26:13 +10:00
Ronnie Sahlberg
dce5969d12 Debug: When scripts hang, we may need to collect additional data in order to debug why the script hung.
Break this debug and datacollection out into an external script to make it easier to modify what data we need to collect.
For now we only collect a pstree so we can see what part of the script we hung in.

S1037271

(This used to be ctdb commit 6e68797af67bee36f2bad045f94806e7e98f27e9)
2012-05-17 10:29:03 +10:00
Ronnie Sahlberg
a57eba2bb4 Track all child process so we never send a signal to an unrelated process (our child died and kernel wrapped the pid-space and reused the pid for a different process
Wrap all creation of child processes inside ctdb_fork() which is used to track all processes we have spawned.
Capture SIGCHLD to track also which child processes have terminated.

Wrap kill() inside ctdb_kill() and make sure that we never send a !0 signal to a child process pid that has already terminated (and might have been replaced with a

(This used to be ctdb commit f73a4b1495830bcdd094a93732a89dd53b3c2f78)
2012-05-03 14:03:26 +10:00
Ronnie Sahlberg
a367fa6138 RELOADIPS: simplify the reloadips code a bit
and also update the "read public address file" to not check if the address exists already locally when we read if from the child process, to stop it
from spamming the logs with "We already host ..."
messages

(This used to be ctdb commit 334ea830f1bf33419f4a1e78f23afd41a852d0f4)
2012-05-01 15:34:26 +10:00
Ronnie Sahlberg
7a1aa560e7 Add new control to reload the public ip address file on a node
Also add a method to use the recovery master/daemon to reload the public ips on all nodes in the cluster.
Reloading the public ips on all node sin the cluster is only suported if all nodes in the cluster are available and healthy.

(This used to be ctdb commit 05603e914f8c12618d7e06943c0f7df207f645b0)
2012-05-01 10:48:08 +10:00
Amitay Isaacs
131d35d67d includes: Move special tevent defines from tevent.h to includes.h
This allows to build against system tevent library. Also include tevent header
along with other common headers.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>

(This used to be ctdb commit 9ae4389c2c959c5dcd8395fdae2b25ed7e1e873a)
2012-04-13 17:28:14 +10:00
Martin Schwenke
fbe64dec01 Undo damage done by d8d37493478a26c5f1809a5f3df89ffd6e149281
The implementation of DisableIPFailover got intermingled with
--nopublicipcheck.  This just looks wrong - Ronnie must have been
having a bad day.  :-)

Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit 5083b266dd68b292c4275505f3d1b878dbf12f11)
2012-03-22 15:34:52 +11:00
Ronnie Sahlberg
2456f77ca6 NoIPTakeover: change the tunable name for the "dont allow failing addresses over onto the node" to NoIPTakeover
(This used to be ctdb commit 35592e618cfd827b6978af6332f80504f232c46a)
2012-03-22 11:05:15 +11:00
Ronnie Sahlberg
befa9df152 Make NoIPFailback a node local setting. Nodes that have NoIPFailback set to !0 can not takeover new ip addresses during failover.
Remove the old global setting for this unused tunable and add it as a new node flag. This node flag is only valid/defined within the takeover subsystem in the recovery daemon. Add async functions to collec the NoIPFailback settings for each node.

This will later e used to disqualify certain nodes from being takeover targets when we perform reallocation.

(This used to be ctdb commit 668f3e88a9e5f598706952b7140547640c85a5ed)
2012-03-22 09:09:57 +11:00
Ronnie Sahlberg
fa3a06246a STICKY: add prototype code to make records stick to a node to "calm" down if they are found to be very hot and accessed by a lot of clients.
This can improve performance and stop clients from having to chase a rapidly migrating/bouncing record

(This used to be ctdb commit d0d98f7e45e5084b81335b004d50bddc80cdc219)
2012-03-20 17:12:19 +11:00
Ronnie Sahlberg
e7e51ddb64 LACOUNT: Add back lacount mechanism to defer migrating a fetched/read copy until after default of 20 consecutive requests from the same node
This can improve performance slightly on certain workloads where smbds frequently read from the same record

(This used to be ctdb commit 035c0d981bde8c0eee8b3f24ba8e2dc817e5b504)
2012-03-20 12:26:22 +11:00
Ronnie Sahlberg
6a493a0b08 STATISTICS: add per-db hop count statistics
(This used to be ctdb commit 1c976d83b1d7dac6f0ef81306774998e4c8b56a1)
2012-03-20 12:11:55 +11:00
Ronnie Sahlberg
c051f67d67 FETCH COLLAPSE : Change the fetch-lock collapse to collapse ALL fetches, including fetch-locks into a single command in flight per record. Also add a tunable to enable/disable this optimization for hot records
(This used to be ctdb commit eafd7bbaaa5931546a96c8beae3cf9a39a49c925)
2012-03-20 11:39:00 +11:00
Ronnie Sahlberg
038c946e80 add max hop count buckets to see how bad hopcounts are
(This used to be ctdb commit 7d3931298e6477d92f43652c3006b0c426cb1307)
2012-03-20 11:20:53 +11:00
Ronnie Sahlberg
f3600276fc Add a tunable variable to control how long we defer after a ctdb addip until we force a rebalance and try to failback addresses onto this node
Have it default to 300 seconds.

(This used to be ctdb commit 49791db7dc74cffd7e88bd73091590cdc1909328)
2012-02-28 06:58:59 +11:00
Ronnie Sahlberg
ef2bd0b016 When adding ips to nodes, set up a deferred rebalance for the whole node to trigger after 60 seconds in case the normal ipreallocated is not sufficient to trigger rebalance.
(This used to be ctdb commit 4340263b219d75c39f8de22abe3f6f1c1ee63ea2)
2012-02-28 06:56:04 +11:00
Ronnie Sahlberg
93ec9c589c Eventscripts: remove the horrible horrible circular reference between state and callback since these two structures do not even share the same parent talloc context.
Instead, tie them together via referencing a permanent linked list hung off the ctdb structure.

(This used to be ctdb commit a95c02da6c67dc4bd8716b75318a4188301df6f9)
2012-02-23 06:49:47 +11:00
Ronnie Sahlberg
42e477b14e READONLY: only send a control to schedule fast-vacuuming from child context iff we have a connection open to the main daemon
there are some child processes where we do not create a connection to the main daemon (switch_from_server_to_client()) because it is expensive to set up and we normally might not need to talk to the daemon at all via a domainsocket.
but we might want to still call to ctdb_ltdb_store() from such chil processes.

(This used to be ctdb commit 9e372a08c40087e6b5335aa298e94d88273566a5)
2012-02-21 07:03:44 +11:00
Ronnie Sahlberg
73f8be16c6 ReadOnly: add per-database statistics to view how much delegations/revokes we have
(This used to be ctdb commit 751ed46197661eb841042ab6a02855a51dd0b17c)
2012-02-08 15:29:27 +11:00
Ronnie Sahlberg
1eafa68f0f STATISTICS: add total counts for number of delegations and number of revokes
Everytime we give a delegation to another node we count this as one delegation.
If the same record is delegated to several nodes we count one for each node.

Everytime a record has all its delegations revoked we count this as one revoke.

(This used to be ctdb commit b098bcf8007be63889aaed640a951b0eeaa9d191)
2012-02-08 13:42:30 +11:00
Martin Schwenke
ed8a8ee966 libctdb - add ctdb_getvnnmap()
Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit f6039eaece4224b866a98dd49010f278a7b3f015)
2012-02-06 16:00:23 +11:00
Ronnie Sahlberg
e648045499 Merge branch 'master' of ssh://git.samba.org/data/git/ctdb
(This used to be ctdb commit 15d8ae8b0f80f95d7839528b8ac60aa0e2485c77)
2012-01-03 12:40:15 +11:00
Michael Adam
e04fad0ee4 vacuum: add new tunable VacuumInterval and mark Vacuum{Default,Min,Max}Interval obsolete
And use VacuumInterval instead of VacuumDefaultInterval in the code.

(This used to be ctdb commit 78530f40338f511a7cd1d33ada450905742bfa8f)
2011-12-23 17:39:02 +01:00
Michael Adam
a481ca711f vacuum: add ctdb_local_remove_from_delete_queue()
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>

(This used to be ctdb commit a5065b42a98c709173503e02d217f97792878625)
2011-12-23 17:39:00 +01:00
Martin Schwenke
8b74037633 ctdb tool - generalise nodestring parsing for -n
Centralise -n nodestring parsing and add the ability to pass a
comma-separated list of node numbers.  Listing a node that is
disconnected or deleted results in failure, similar to the way passing
a single node currently works.  All of the auto_all commands inherit
this functionality.  For now, the non-auto_all commands do not inherit
this - they need to be individually tweaked.  Therefore, we haven't
updated the documentation to advertise this feature.

Implemented via a new function parse_nodestring() that parses an
optional (pass NULL when not available to indicate "current node")
comma-separated list of node numbers or "all".  parse_nodestring() can
be told to be non-fatal for disconnected/deleted nodes so it can also
be used in other contexts (yes, coming soon).  main() is changed to
call this function.

A new magic PNN value CTDB_MULTICAST is added and along with a
corresponding option.nodes structure member (a talloc-ed array of
PNNs).  This is also populated for "all" as well.

control_status() has new function pretty_print_flags() factored out so
pretty-printed flags can be used in error/debug messages.  New
function is_partially_online() is also factored out - this simplifies
some of the logic.

Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit 920e3a732eb9e09004edde6cfb3c7db8a004016f)
2011-12-08 17:00:17 +11:00
Ronnie Sahlberg
609149bdc8 LibCTDB: Add support for the 'get interfaces' control and update the ctdb tool to use this interface
(This used to be ctdb commit 77dc0c7351071243d9096d3607d7499c82f46ec0)
2011-12-06 13:12:18 +11:00
Mathieu Parent
bb3d6698e9 Move platform-specific code to common/system_*
This removes #ifdef AIX and ease the addition of new platforms.

(This used to be ctdb commit 2fd1067a075fe0e4b2a36d4ea18af139d03f17bf)
2011-12-06 11:57:11 +11:00
Michael Adam
ad0de5494e traverse: fix traversing with empty records by adding a new (internal) control CTDB_CONTROL_TRAVERSE_START_EXT
By this, the original CTDB_CONTROL_TRAVERSE_START control that is
used by e.g. samba's smbstatus, is not changed, so that samba
continues working without code change.

The  CTDB_CONTROL_TRAVERSE_START currently just adds the "withemptyrecords"
flag to the state and processon on as CTDB_CONTROL_TRAVERSE_START_EXT.

(This used to be ctdb commit 8281bb210858ed04992eacea7f6d02261e0fc1b1)
2011-12-03 02:15:30 +01:00
Ronnie Sahlberg
11f3c947e6 LibCTDB: add support for the check-srvids control
(This used to be ctdb commit c32604fd0016de0df14845a2f222edaa3c52a4fa)
2011-11-30 10:00:07 +11:00
Volker Lendecke
5a1da0ac55 Add CTDB_CONTROL_CHECK_SRVID
(This used to be ctdb commit ad64ef2c40a2a12b37dbf39142e95c6781c2fc3b)
2011-11-30 09:02:26 +11:00
Ronnie Sahlberg
0420449a6c Recover Persistent database DB by DB and not record by record
Add a new tunable that changes the mode how persistent databases are recovered.
RecoveryPDBBySeqNum

When set to 1, persistent databases will be recovered in whole from the node which
has the highest "__db_sequence_number__" record.
This record is managed by samba for those databases where we do persistent writes and have
inter-record relations.
For these databases we do not want the usual "blend records from all nodes based
on individual record RSN" but instead a mode where we pick one instance of the persistent database.

If no node was found with a "__db_sequence_number__" record at all, we fail back to the original "recover records independently based on record RSN".
Some persistent databases do not contain record interrelations and as such does not
contain this special record at all.

(This used to be ctdb commit 502150c764298a9fa8c4d8aa445bf7d85d4ee9dc)
2011-11-30 08:48:23 +11:00
Ronnie Sahlberg
3cbff2edd8 LibCTDB: add get persistent db seqnum control
(This used to be ctdb commit 6e96a62494bbb2c7b0682ebf0c2115dd2f44f7af)
2011-11-30 08:48:14 +11:00
Michael Adam
31d62794fe ctdb: add an option --print-recordflags to trigger printing record flags in catdb and dumpdbbackup
This changes the default behaviour to not print record flags.

(This used to be ctdb commit 2d2ce07c51055d9400b22cd3c1fd682597cb921c)
2011-11-29 13:43:35 +01:00
Michael Adam
e6923904e8 ctdb: add an option --print-hash to enable printing of record hashes when dumping dbs
(This used to be ctdb commit efc033c28ade97f9884794256d59a4553e052d5f)
2011-11-29 13:43:34 +01:00
Michael Adam
86cd78efee ctdb: add an option --print-lmaster to enable printing of lmaster in "ctdb catdb"
(This used to be ctdb commit 326f88ef622620cb9e0569c4497bc0e86124beaa)
2011-11-29 13:43:33 +01:00
Michael Adam
dc98c12ac9 ctdb: add an option --print-datasize to only print datasize instead of dumping data in db dumps
Used in catdb, cattdb and dumpdbbackup.

(This used to be ctdb commit dd866116041e71cbf91e7fd91edcc9501634051d)
2011-11-29 13:43:32 +01:00
Michael Adam
1fcc7651f4 ctdb: add an option --print-emptyrecords to enable printing of empty records in dumping databases
this option is used with the commands catdb, cattdb and dumpdbbackup.

(This used to be ctdb commit 6ec68a2e667f66d2b194fe48cb75229a2777842e)
2011-11-29 10:30:24 +01:00
Michael Adam
1a31c84348 traverse: add a flag to enable transferring empty records in cluster wide traverse
This will be useful for also printing information about empty/deleted
records in "ctdb catdb", e.g. for debugging vacuuming issues.

(This used to be ctdb commit ddc5da3a0df7701934404192a0a0aa659a806acb)
2011-11-29 10:30:24 +01:00
Martin Schwenke
3ae8273d86 Make some ctdb_takeover.c functions static
These were intentionally not static so they could be linked to in unit
test programs.  However, using the CCAN-style unit tests where
relevant code is just included, this is no longer necessary.

Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit d0e9e8554614bd49ffb9ec3509feaa0e80d0f65d)
2011-11-11 14:41:47 +11:00
Martin Schwenke
f186dd90b6 Move some common functions to common/ctdb_ltdb.c
Move identical copies of ctdb_null_func(), ctdb_fetch_func(),
ctdb_fetch_with_header_func() from ctdb_client.c and
ctdb_ltdb_server.c to somewhere common.

This is in the context of wanting to run CCAN-style tests where most
of the ctdbd code is just included in the test program.

Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit 126cb0d369b2b1aed63801dc4ba0554399e8b7e4)
2011-11-11 14:31:50 +11:00
Martin Schwenke
52ff485958 Added some #ifndefs to stop files being included multiple times.
Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit fdca12c25e6fce6206135b994dedf44265e4eb09)
2011-11-11 14:31:50 +11:00
Ronnie Sahlberg
44de394796 SRVID ranges: Change the ranges for SRVIDs to allow 8 bit prefixes
Update the ranges used for SRVID allocation to allow 8 bit prefixes and thus
56 user-defined bits.
Define the defacto-use of the 0x00 prefix as a SRVID used to register a process id
Upgrade SAMBA/iSCSI/NFS/TEST from a 32 bit prefix each ot a 8 bit prefix each
for private use.

(This used to be ctdb commit 5de9ec2bdf8067406165bc470becdca87f458ae9)
2011-11-09 08:12:44 +11:00
Ronnie Sahlberg
0e79b2d1e8 Record Fetch Collapse: Collapse multiple fetch request into one single request.
When multiple clients fetch the same record concurrently, send only one single
fetch across the network and deferr all other fetches locally.
This improves performance for hot records and reduces cpu load on ctdb.

(This used to be ctdb commit 82d6946ad8b3348e8b9d3d971f24925ade02d1be)
2011-11-08 16:08:28 +11:00
Ronnie Sahlberg
c21ec9fffc ReadOnly: add readonly record lock requests to libctdb
Initial readonly record support in libctdb.
New records are not yet created by the library but extising records will be delegated as readonly records.
This needs a bit more tests before we can drop the "old style" implementation of client
code in client/ctdb_client.c

(This used to be ctdb commit fb50a45a21ff56480d76acd1c33c13c323cbf5e2)
2011-10-28 11:55:46 +11:00
Ronnie Sahlberg
8e4bfba75c ReadOnly: Rename the function ctdb_ltdb_fetch_readonly() to ctdb_ltdb_fetch_with_header() since this is what it actually does.
(This used to be ctdb commit 94a5ce4e08e7891f07dbfe4c822ca4be5ab10965)
2011-09-13 18:38:20 +10:00
Ronnie Sahlberg
0dc5584101 Merge branch 'master-readonly-records' into foo
Conflicts:

	Makefile.in
	tools/ctdb.c

(This used to be ctdb commit 0fedef0ffba4178126eee9544c5e2db52f5db893)
2011-09-12 09:34:34 +10:00
Ronnie Sahlberg
1c05db2c9c Merge remote branch 'ddiss/master_pmda_and_client_timeouts'
(This used to be ctdb commit 7bebfc7bad8f36e54003b8e25372fdaf54836e21)
2011-09-08 11:22:53 +10:00
David Disseldorp
2f925f1e64 pmda: Attempt reconnects while ctdbd is unavailable
Attempt to reconnect to ctdbd on fetch while it is unreachable.

We must provide our own queue callback wrapper, as ctdb_client_read_cb()
exits on transport failure.

(This used to be ctdb commit 28df6fbf1273b8d095a2bc38dca6a6c35c5c31bd)
2011-09-06 14:01:18 +02:00
David Disseldorp
5296da5609 client: add timeout argument to ctdb_attach
Rather than using a fixed 2 second CTDB_CONTROL_GETDBPATH timeout.

(This used to be ctdb commit 9e178671560cb95121e11d718a76b05380ecd6c5)
2011-09-06 13:57:04 +02:00
David Disseldorp
0628d1c0e6 client: add req timeout argument to ctdb_cmdline_client
Following connection to the local ctdbd, ctdb_cmdline_client() currently
issues a CTDB_CONTROL_GET_PNN request with a fixed 3 second timeout.

The ctdb cmd line client accepts a --timelimit argument for specifying
a per request timeout, pass this value through to ctdb_cmdline_client()
for use as a CTDB_CONTROL_GET_PNN request timeout.

(This used to be ctdb commit 0634d0305f42f17048b6830733767e8dc300e11c)
2011-09-06 13:56:54 +02:00