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Logically this belongs into the previous patch, but tevent deserves isolated
patches :-)
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This is infrastructure to improve our async r/w result handling and latency.
The pthreadpool signalling goes through a pipe. This has downsides: The main
event loop has to go through a read on the pipe before it can ship the result.
Also, it is not guaranteed by poll/epoll that the pthreadpool signal pipe is
handled with top priority. When an async pread/pwrite has finished, we should
immediately ship the result to the client, not waiting for anything else.
This patch enables tevent_immediate structs as job signalling. This means a
busy main tevent loop will handle the threaded job completion before any timed
or file descriptor events. Opposite to Jeremy's tevent_thread_proxy this is
done by a modification of the main event loop by looking at a linked list under
a central mutex.
Regarding performance: In a later commit I've created a test that does nothing
but fire one immediate over and over again. If you add a phread_mutex_lock and
unlock pair in the immediate handler, you lose roughly 25% of rounds per
second, so it is measurable. It is questionable that will be measurable in the
real world, but to counter concerns activation of immediates needs to go
through a new struct tevent_threaded_context. Only if such a
tevent_threaded_context exists for a tevent context, the main loop takes the
hit to look at the mutex'ed list of finished jobs.
This patch by design does not care about talloc hierarchies. The idea is that
the main thread owning the tevent context creates a chunk of memory and
prepares the tevent_immediate indication job completion. The main thread hands
the memory chunk together with the immediate as a job description over to a
helper thread. The helper thread does its job and upon completion calls
tevent_threaded_schedule_immediate with the already-prepared immediate. From
that point on memory ownership is again transferred to the main thread.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Signalling the main event loop will also happen from threads soon, and
that will use the same mechanism. This also keeps the pipe open after the last
signal handler is removed. Threaded jobs will come and go very frequently, and
always setting up and tearing down the pipe for each job will be expensive.
Also, this is "just" two file descriptors, and with eventfd just one.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This will be used in tevent soon
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
The current daemons_stop() implementation uses very loose matching to
decide which processes to kill if "ctdb shutdown" hasn't worked within
1 second. This can cause ctdbd processes from other test runs to be
killed.
Instead, use ctdbd_wrapper, which uses the PID file as a last resort.
This has the advantage of never killing ctdbd processes from other
test runs. However, this also has the obvious consequence that an
interrupted test run in one directory can not have its daemons cleaned
up from a new test run in a different directory.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12170
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 Aug 23 21:17:46 CEST 2016 on sn-devel-144
This function doesn't do anything significant, so just unroll the body
into the loop in daemons_start().
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12170
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
These files don't need to be re-generated on every restart. They can
be generated once when CTDB is first started.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12170
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
It does something special if the --start-as-stopped option is given
and is not used in any tests.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12170
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The 4.5.x WHATSNEW.txt is maintained in v4-5-test.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Tue Aug 23 16:02:09 CEST 2016 on sn-devel-144
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Tue Aug 23 10:46:17 CEST 2016 on sn-devel-144
Pair-Programmed-With: Guenther Deschner <gd@samba.org>
Signed-off-by: Andreas Schneider <asn@samba.org>
Signed-off-by: Guenther Deschner <gd@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Tue Aug 23 05:00:13 CEST 2016 on sn-devel-144
We already supported getting driver info level 8 but not adding it. This
allows adding printer drivers with level. So several fields where emtpy.
Microsoft released a security update for Windows print spooler
components which requires support for driver info level 8 now. This is
needed to find out if a driver is PACKAGE_AWARE or not.
Pair-Programmed-With: Guenther Deschner <gd@samba.org>
Signed-off-by: Andreas Schneider <asn@samba.org>
Signed-off-by: Guenther Deschner <gd@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12166
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Uri Simchoni <uri@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Mon Aug 22 22:59:22 CEST 2016 on sn-devel-144
Not yet used - we will use these to construct the SMB2 TWrp blob.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12166
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Uri Simchoni <uri@samba.org>
SMB2 shadow copy requests are the first time we've used
create contexts in anger in this codepath. This took me
longer than I'd like to admit to find :-).
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12166
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Uri Simchoni <uri@samba.org>
When an error occurs so an IP address is not released then the PNN in
the VNN is currently incorrectly updated.
Instead, update the PNN in the callback when the release is
successful. Also, explicitly update the PNN on redundant releases.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12158
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): Sun Aug 21 22:45:33 CEST 2016 on sn-devel-144
Many years ago takeover_callback_state was used for both IP takeover
and release. Now it is only used when releasing an IP so rename it to
improve clarity.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12158
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Sat Aug 20 13:38:37 CEST 2016 on sn-devel-144
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Sat Aug 20 09:41:33 CEST 2016 on sn-devel-144
Once with 'get_names = false' to get the size, then again with 'get_names = true'
to get the data or a Windows server fails to return valid info. Samba doesn't have this bug.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12165
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Uri Simchoni <uri@samba.org>
Autobuild-User(master): Uri Simchoni <uri@samba.org>
Autobuild-Date(master): Fri Aug 19 23:59:35 CEST 2016 on sn-devel-144
