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We only have one messaging_dgm context per process. But we will use this from
two completely independent messaging subsystems which are independently
initialized. We need to coordinate creation and destruction, do this via
talloc.
I know this looks like a step back, but when in the future we have really just
one messaging subsystem, this can go again. My immediate goal is to make
source3 and source4 transport-compatible, and this looks like a quick way
towards that goal.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
This is a little set of routines to deal with the ugly fd-passing macros.
This patch is the first step assisting the creation of msghrds for sending fds.
Receiving fd helpers will follow later.
The basic idea behind these routines is that they fill a variable-sized buffer.
They are supposed to be called twice per msghdr preparation. First with a
0-sized NULL output buffer to calculate the required bufsize, and then a second
time filling in the buffer as such.
This does not take care of the old msg_accrights way of passing file
descriptors. CMSG/SCM_RIGHTS is standardized for quite a while now, and I
believe this intreface can be made to also take care of msg_accrights if
needed.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
This will enable messaging3 users to more easily register themselves
under a name
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Will enable us to solve the dynamic share path problem
with leases on [homes].
We're also able to give the correct error codes when a
lease key is re-used with a different file name.
Pair-Programmed-With: Jeremy Allison <jra@samba.org>
Signed-off-by: Volker Lendecke <vl@samba.org>
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
In the process, we can also rename pdb to avoid conflicts with libpdb.
We don't depend directly on pdb to avoid duplicate symbols.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=10355
Change-Id: I4df6ba2f4ce35d3718dc4198b527cca46a139efe
Pair-programmed-with: Andrew Bartlett <abartlet@samba.org>
Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
nmbd never calls profile_setup() and never collects any profiling data.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This conditional compile avoids some #ifdef WITH_PROFILE, which makes the code
more readable
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This conditional compile avoids some #ifdef WITH_PROFILE, which makes the code
more readable
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Widget works for lists with one or more column(s).
Column headers are optional.
As a test, the patch also modifies regedit to use the
new widget for viewing registry keys. Valuelist still
needs to be upgraded to use this.
Signed-off-by: Chris Davis <cd.rattan@gmail.com>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Pair-programmed-with: Andrew Bartlett <abartlet@samba.org>
With this pair of programs I did some performance tests of the messaging
system. Guess what -- I found two bugs :-)
See the subsequent patches.
With 1500 msg_source processes I can generate message overload: A
Intel(R) Xeon(R) CPU L5640 @ 2.27GHz
can receive roughly 100k messages per second. When using
messaging_read_send/recv user/system time is roughly even, a bit more
work done in user space. When using messaging_register, due to less
malloc activity, user space chews a lot less.
By the way: 1.500 helper threads in a blocking sendto() against a single
datagram socket reading as fast as it can (with epoll_wait in between)
only drove the loadavg to 12 on a 24-core machine. So I guess unix domain
datagram sockets are pretty well protected against overload. No thundering
herd or so. Interestingly "top" showed msg_sink at less than 90% CPU,
although it was clearly the bottleneck. But that must be a "top" artifact.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@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
We panic if we get an oplock break response for a cancelled create request
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Sat Jun 21 23:05:47 CEST 2014 on sn-devel-104
This patch seems odd, but the pdb_samba_dsdb module has exactly this
semantics. That is, the pdb_samba_dsdb is responsible for all IDMAP
values, due to backing on to the idmap.ldb allocator. This option is
added so we can continue to support the mappings written into that
database even when switching winbindd implementations - the source4/
winbind code would only ask the idmap_ldb code, no matter what the
SID.
Almost all of the behaviour for this is already in winbindd, but we
need this extra flag function so as to avoid (currently intentional)
errors at startup due to not having a per-domain allocation
configured in the smb.conf.
Andrew Bartlett
Change-Id: I6b0d7a1463fe28dfd36715af0285911ecc07585c
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Kamen Mazdrashki <kamenim@samba.org>
Change-Id: I385ef8bd766848becc42e58694207dc94cd07a89
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Change-Id: Iba3913d5a1c7f851b93f37e9beb6dbb20fbf7e55
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Change-Id: Ib87933c318f510d95f7008e122216d73803ede68
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Change-Id: Ie3c7109fef6982d95e8cad06870334565352e329
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
some of the code in afs.c is needed by wbinfo that lives in the toplevel
nsswitch directory, so move the afs.c file to a new top-level lib/afs
directory. Use the name afs_funcs to avoid collisions with the afs.h
header from OpenAFS
Signed-off-by: Christian Ambach <ambi@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
If --with-ctdb-dir option is not specified, use CTDB headers from ctdb/
subdirectory in the source tree.
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): Tue May 27 16:07:13 CEST 2014 on sn-devel-104
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>
