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Messaging based on unix domain datagram sockets
This makes every process participating in messaging bind on a unix domain
datagram socket, similar to the source4 based messaging. The details are a bit
different though:
Retry after EWOULDBLOCK is done with a blocking thread, not by polling. This
was the only way I could in experiments avoid a thundering herd or high load
under Linux in extreme overload situations like many thousands of processes
sending to one blocked process. If there are better ideas to do this in a
simple way, I'm more than happy to remove the pthreadpool dependency again.
There is only one socket per process, not per task. I don't think that per-task
sockets are really necessary, we can do filtering in user space. The message
contains the destination server_id, which contains the destination task_id. I
think we can rebase the source4 based imessaging on top of this, allowing
multiple imessaging contexts on top of one messaging_context. I had planned to
do this conversion before this goes in, but Jeremy convinced me that this has
value in itself :-)
Per socket we also create a fcntl-based lockfile to allow race-free cleanup of
orphaned sockets. This lockfile contains the unique_id, which in the future
will make the server_id.tdb obsolete.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This is a messaging layer based on unix domain datagram sockets.
Sending to an idle socket is just one single nonblocking sendmsg call. If the
recv queue is full, we start a background thread to do a blocking call. The
source4 based imessaging uses a polling fallback. In a situation where
thousands of senders beat one single blocked socket, this will generate load on
the system due to the constant polling. This does not happen with a threaded
blocking send call.
The threaded approach has another advantage: We save become_root() calls on the
retries. The access checks are done when the blocking socket is connected, the
threaded blocking send call does not check permissions anymore.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This is an abstraction for a tevent loop. It will be used in low-level
messaging with the goal to make low-leve our low-level messaging routines
usable also for other projects which are not based on tevent.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Add --with-systemd / --without-systemd options to check whether
libsystemd-daemon library is available and use it to report service
startup status to systemd for smbd/winbindd/nmbd and AD DC.
The problem it solves is correct reporting of the Samba services
at the point when they are ready to serve clients, important for
high availability software integration.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=10517
Signed-off-by: Alexander Bokovoy <ab@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Kamen Mazdrashki <kamenim@samba.org>
Autobuild-User(master): Kamen Mazdrashki <kamenim@samba.org>
Autobuild-Date(master): Wed Apr 23 01:49:09 CEST 2014 on sn-devel-104
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Richard Sharpe <realrichardsharpe@gmail.com>
Reviewed-by: David Disseldorp <ddiss@suse.de>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Tue Apr 22 22:19:18 CEST 2014 on sn-devel-104
Remove an unused variable and use discard_const_p.
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Fri Apr 18 22:25:25 CEST 2014 on sn-devel-104
This allows auth_winbind in source4 to use this more correct conversion routine.
Andrew Bartlett
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Pass down a struct sockaddr_storage to ads_try_connect.
Guenther
Signed-off-by: Günther Deschner <gd@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Günther Deschner <gd@samba.org>
Autobuild-Date(master): Thu Apr 17 19:56:16 CEST 2014 on sn-devel-104
It is very confusing if the env var uses the same name as the define in
the source code. So prefix it with SELFTEST.
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
We will run uid_wrapper as root so that this succeeds.
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Always allow the client to turn on SMB1 signing using
FLAGS2_SMB_SECURITY_SIGNATURES_REQUIRED.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Wed Apr 16 10:07:56 CEST 2014 on sn-devel-104
The comments indicate that this was needed for HP-UX at one point, but
the configure code was never ported to WAF.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Tue Apr 15 12:32:09 CEST 2014 on sn-devel-104
This code is dead since the move to the WAF build system, but was set
for HP-UX 9, 10 and 11 in the autoconf build system.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
This is dead code, and probably has been for quite some time.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
The WAF build does not have the code to detect getprpwnam, so this is
dead code.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
The WAF build does not have the code to detect getprpwnam on which
this is based, and so this is dead code.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
The waf build does not have code to detect support for AFS plaintext
authentication, so this is dead code.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
The waf build has no logic to detect DCE/DFS, so this plaintext
authentication mechanism is dead code.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
smb2req always comes from talloc_zero().
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Fri Apr 11 23:55:17 CEST 2014 on sn-devel-104
This way the buffer will likely be allocated within the existing talloc_pool,
which avoids one malloc() per request.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
For recvfile we haven't read and may not allocated the dyn buffer.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
For recvfile we haven't read and may not allocated the dyn buffer.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
It's more logical to check the fnum instead of tid here.
This will make it easier to reuse the logic for SMB2 and
allows per fsp recvfile detection.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Based on work proposed by Jones <jones.kstw@gmail.com>.
Removes set_blocking()/set_unblocking() fcntl
calls around RECVFILE on the non-blocking socket.
Instead uses RECVFILE in a loop, and only drops
back to set_blocking()/set_unblocking() once
RECVFILE returns -1/EAGAIN/EWOULDBLOCK.
From the samba-technical list:
------------------------------------------------
The iometer 512b sequential write shows following result,
Before applying this patch: 75333 IOps
After applying this patch: 82691 IOps
------------------------------------------------
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
