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Prefork is the more sensible default option now, as it better
handles a large number of client connections.
Signed-off-by: Tim Beale <timbeale@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
It confuses the 'samba-tool processes' output and log messages.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13752
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Björn Baumbach <bbaumbach@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Tue Jan 1 16:02:05 CET 2019 on sn-devel-144
Limit the number of processes started by the standard model on accept.
For those services that support fork on accept, the standard model forks
a new process for each new connection. This patch limits the number of
processes to the value specified in 'max smbd processes', a value of
zero indicates that there is no limit on the number of processes that
can be forked.
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Add some comments to the prefork code explaining what's going on.
Signed-off-by: Tim Beale <timbeale@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Fri Nov 23 11:40:49 CET 2018 on sn-devel-144
Clean up names registered in messaging for a terminated process.
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Add new smbd.conf variables 'prefork backoff increment' and
'prefork maximum backoff' to control the rate at which failed pre-forked
processes are restarted.
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Restart any pre-fork master or worker process that exits with a non
zero exit code.
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Pass the fatal flag supplied to task_server_terminate to the process
task_terminate method. It will be used by the task_terminate methods to
set an appropriate exit code. The process_prefork model will use a non
zero exit code to indicate that the process should be restarted.
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Restart any pre-forked master or worker process that terminated with SIGABRT,
SIGBUS, SIGFPE, SIGILL or SIGSYS
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Pass information about the pre-fork master and worker processes that
will allow them to be restarted.
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Pass the instance number to the post_fork hook. This is required to
allow the rpc_server to support the prefork process model.
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Add a post fork hook to the service API this will be called:
- standard process model
immediately after the task_init.
- single process model
immediately after the task_init
- prefork process model, inhibit_pre_fork = true
immediately after the task_init
- prefork process model, inhibit_pre_fork = false
after each service worker has forked. It is not run on the service
master process.
The post fork hook is not called in the standard model if a new process
is forked on a new connection. It is instead called immediately after
the task_init.
The task_init hook has been changed to return an error code. This ensures
the post_fork code is only run if the task_init code completed successfully.
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
This prevents a backup tar file, created with the new official
backup tools, from being extracted and replicated.
This is done here to ensure that samba-tool and ldbsearch can
still operate on the backup (eg for forensics) but starting
Samba as an AD DC will fail.
Signed-off-by: Aaron Haslett <aaronhaslett@catalyst.net.nz>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
In some cases (containers mainly) /var/run may not be present. Instead of
erroring, we should create it at startup.
Signed-off-by: William Brown <william@blackhats.net.au>
Reviewed-by: Alexander Bokovoy <ab@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Every caller did a talloc_steal() after socket_create(). Just pass in the
correct memory context.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Mon Jan 1 19:19:22 CET 2018 on sn-devel-144
Commit 8736013dc4 got the (confusing) sense of opt_fork
wrong.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13129
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Tue Dec 19 11:24:29 CET 2017 on sn-devel-144
error: implicit declaration of function ‘getpgrp’; did you mean ‘getpt’?
[-Werror=implicit-function-declaration]
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Update the debug logging to use the currently preferred debug macros
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
Add a pre fork process model to bound the number processes forked by
samba. Currently workers are only pre-forked for the ldap server, all
the other services have pre-fork support disabled.
When pre-fork support is disabled a new process is started for each
service, and requests are processed by that process.
This commit partially reverts commit
b5be45c453.
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
Fix code formatting from the refactoring in the previous commits.
Done as a separate patch to make the changes to functionality easier
to review.
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
This allows the service to control if it should fork per accept() without needing
to replace the whole process model with process_single.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
This avoids cleaning up on error from accept() but more importantly
allows a future mode that acts like process_single and so has no child.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
Use the new process_context to control the from_parent_fd
This avoids the use of global variables, and will in the next patch
allow process_standard to run as what was known as single without
over-stamping a different process model.
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
Refactor the process model code to allow the addition of a prefork
process model.
- Add a process context to contain process model specific state
- Add a service details structure to allow service to indicate which
process model options they can support.
In the new code the services advertise the features they support to the
process model. The process model context is plumbed through to allow the
process model to keep track of the supported options, and any state
the process model may require.
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
The standard model uses a pipe to signal the worker processes spawned on
accept that the controlling process has terminated and that they should
shut down. This pipe is currently a static global variable in
process_standard.c.
This patch replaces that global pipe with a file descriptor passed into
the process model init functions, giving a single mechanism across all process
models. This paves the way for the addition of a pre-fork process model.
Ensuring that the correct file descriptors are closed, is difficult so
it is best do this only once rather than require the process models to
do this individually.
Notes on debugging pipe ownership:
Add code to log the process id and the file descriptor of the writeable
pipe.
run:
lsof | grep FIFO | grep samba | grep <process id>
this will produce lines like:
samba 25624 him 4w FIFO 0,10 0t0 472206 pipe
where: 4w is the file descriptor and mode and the number to the left
of "pipe" is the pipe id.
then:
lsof | grep FIFO | grep samba | grep <pipe id>
This will display all the processes with the pipe open and the mode
only the smbd master process should have it open in write mode.
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Thu Sep 28 02:08:34 CEST 2017 on sn-devel-144
Set the process title in the samba root process to clearly identify it
in ps output.
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Call setproctitle_init() in main which suppresses the
"samba: setproctitle not initialized, please either call
setproctitle_init() or link against libbsd-ctor."
messages, but more importantly it displays meaningful details in ps
output.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=9816
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Set the process group in the samba daemon, the --no-process-group option
allows this to be disabled. The no-process-group option needs to be
disabled in self test.
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Mon Sep 18 04:39:50 CEST 2017 on sn-devel-144
This sometimes would show up as corrupted bytes during logs. Hammering
the LDAP server enough times managed to trigger an outright segfault.
Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Use the passed in context from callers. Remove one
talloc_autofree_context().
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
This makes sure we remove any messaging sockets if a child dies or calls exit()
without running the talloc destructor for messaging
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Not currently used - no logic changes inside.
This will make it possible to pass down a long-lived talloc
context from the loading function for modules to use instead
of having them internally all use talloc_autofree_context()
which is a hidden global.
Updated all known module interface numbers, and added a
WHATSNEW.
Signed-off-by: Jeremy Allison <jra@samba.org>
Signed-off-by: Ralph Böhme <slow@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Sat Apr 22 01:17:00 CEST 2017 on sn-devel-144
Ensure it's freed on all error paths.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Mon Apr 17 23:10:06 CEST 2017 on sn-devel-144
Use state->event_ctx as the parent of the initial imessaging context.
Now we control all exit paths, we can call TALLOC_FREE(state)
on all of them.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Defensive programming change. Not strictly needed to prevent
any crash/error.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Simplify by removing global state we don't need now
we're called by tevent (and in the short window where
we're installed by CatchSignal but before we install
the tevent handler we don't need the complex global
state handling as we have no forked children).
We now have access to struct server_state on all
exit paths - next commits will stop using talloc autofree context.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
