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Currently, automatic printer share updates are handled in the following
way:
- Background printer process (BPP) forked on startup
- Parent smbd and per-client children await MSG_PRINTER_PCAP messages
- BPP periodically polls the printing backend for printcap data
- printcap data written to printer_list.tdb
- MSG_PRINTER_PCAP sent to all smbd processes following update
- smbd processes all read the latest printer_list.tdb data, and update
their share listings
This procedure is not scalable, as all smbd processes hit
printer_list.tdb in parallel, resulting in a large spike in CPU usage.
This change sees smbd processes only update their printer share lists
only when a client asks for this information, e.g. via NetShareEnum or
EnumPrinters.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=10652
Suggested-by: Volker Lendecke <vl@samba.org>
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
This is generic enough that it could be used in all code.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Fri Jul 18 15:43:33 CEST 2014 on sn-devel-104
This function is only used in server.c
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Mon Jun 30 17:20:00 CEST 2014 on sn-devel-104
The parent smbd process only forwards the message to the child
processes. Use a common function instead of two separate ones that do
the same thing.
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Allow us to start if we bind to *either* :: or 0.0.0.0.
Allows us to cope with systems configured as only IPv4
or only IPv6.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-By: Amitay Isaacs <amitay@gmail.com>
Reviewed-By: Alexander Bokovoy <ab@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Sat Jun 7 01:01:44 CEST 2014 on sn-devel-104
This is a bit lazy programming, we could and possibly should do this in
exit_server() in the child. But this way we make sure the cleanup works. If it
only was executed for unclean exits, we might not detect failure of this code
in the parent.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
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>
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>
When a smbd process dies, pending messages.tdb records for this process
might not get cleaned up. Implement a cleanup for dead records that is
triggered after a smbd dies uncleanly; the records for that PID are
deleted.
Based on a patchset from Christof Schmitt <cs@samba.org>.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Christof Schmitt <cs@samba.org>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=10388
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Alexander Bokovoy <ab@samba.org>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Tue Apr 1 23:16:19 CEST 2014 on sn-devel-104
All ctdb specific code is isolated in samba-cluster-support.so now.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
Autobuild-User(master): Michael Adam <obnox@samba.org>
Autobuild-Date(master): Mon Mar 24 19:08:44 CET 2014 on sn-devel-104
This removes the ability to set paths like the sbindir, bindir, and changes the tool for setting lockdir
statedir etc to be via --option="lock dir=/var/lock".
These were originally added by commit 90a6873b0570f2691ba8d8fd11154c856bdd4415
by James Peach <jpeach@samba.org>
The important use case, qemu, does not use these options, but specifies these directories via an smb.conf.
They are being removed to remove a layer from the loadparm system, now that options
can be specified from the command line. It will also make it easier to generate the affected
parameters from the XML documentation if this layer of indirection is removed.
Andrew Bartlett
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Wed Feb 12 16:42:14 CET 2014 on sn-devel-104
if MSG_SMB_KILL_CLIENT_IP message comes in and our client has
the IP address given as argument, then shutdown the connection immediately
Signed-off-by: Christian Ambach <ambi@samba.org>
Reviewed-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This will avoid panic calls when smbd and winbind is started in cluster
mode before ctdb is functional. It still logs something sane at debug
level 0, but it does not panic and core anymore.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Gregor Beck <gbeck@sernet.de>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
Reviewed by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Wed Nov 14 02:19:46 CET 2012 on sn-devel-104
This was used to maintain the connections.tdb database which is being removed.
We use info from the smbXsrv_tcon instead.
Signed-off-by: Michael Adam <obnox@samba.org>
no point in calling this if printing was disabled and no spoolss service was started
this hurts CTDB clusters as the smbds on the cluster nodes will fight for the single record in the TDB
This fixes Bug 9197 - Disabling printing still makes smbd create and access printer_list.tdb
They use talloc_tos() internally: hoist that up to the callers, some
of whom don't want to us talloc_tos().
A simple patch, but hits a lot of files.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This helps clarify the role of this structure and wrapper function.
The purpose here is to provide helper functions to the lib/param
loadparm_context that point back at the s3 lp_ functions. This allows
a struct loadparm_context to be passed to any point in the code, and
always refer to the correct loadparm system. If this has not been
set, the variables loaded in the lib/param code will be returned.
As requested by Michael Adam.
Andrew Bartlett
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Wed Jun 27 17:11:16 CEST 2012 on sn-devel-104
