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All callers already do this explicitly by calling process_set_title().
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This is the big switch to use samba-dcerpcd for the RPC services in
source3/. It is a pretty big and unordered patch, but I don't see a
good way to split this up into more manageable pieces without
sacrificing bisectability even more. Probably I could cut out a few
small ones, but a major architechtural switch like this will always be
messy.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Samuel Cabrero <scabrero@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
It's a bit shocking how many references we have to global
contexts. Make this a bit more obvious.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
To me this is then easier to figure out what is defined there, and
where it's exactly used.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This is just a step in the correct direction, but there's still a
possible race...
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14433
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Guenther Deschner <gd@samba.org>
Autobuild-User(master): Günther Deschner <gd@samba.org>
Autobuild-Date(master): Tue Jul 14 14:59:19 UTC 2020 on sn-devel-184
It's good to have an isolated function that just disconnects the
lower layer transport and remembers the first error status.
This will be used in more placed in the following commits.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Guenther Deschner <gd@samba.org>
Prototype is generated by the server compat parser.
Signed-off-by: Samuel Cabrero <scabrero@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
The rpc_<service>_shutdown function unregisters the legacy api_struct
from the local dispatch table, which is not longer used as local
dispatching is done through dcesrv_interface and will be removed in
following commits.
The dcesrv_shutdown_registered_ep_servers will unregister endpoint servers.
Signed-off-by: Samuel Cabrero <scabrero@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Initialize and shutdown the endpoint servers registed by the endpoint
mapper daemon. The pidl-generated init function will register the
api_struct for backward compatibility until completely removed.
The common server exit routine will shutdown all registered endpoint
servers, and the pidl-generated shutdown function will unregister the
api_struct.
Signed-off-by: Samuel Cabrero <scabrero@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
We need to keep the smbXsrv_connection structures around until all
pending requests have had their chance to clean up behind them. If you
look at srv_send_smb(), it's exactly prepared already to just drop
anything on the floor when the transport has been declared dead:
if (!NT_STATUS_IS_OK(xconn->transport.status)) {
/*
* we're not supposed to do any io
*/
return true;
}
Bug: https://bugzilla.samba.org/show_bug.cgi?id=14064
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Thu Aug 1 15:39:13 UTC 2019 on sn-devel-184
At more than one large site I've seen significant problems due to
gencache_stabilize. gencache_stabilize was mainly introduced to
survive machine crashes with the cache still being in place. Given
that most installations crash rarely and this is still a cache, this
safety is overkill and causes real problems.
With the recent changes to tdb, we should be safe enough to run on
completely corrupted databases and properly detect errors. A further
commit will introduce code that wipes the gencache.tdb if such a
corruption is detected.
There is one kind of corruption that we don't properly handle:
Orphaned space in the database. I don't have a good idea yet how to
handle this in a graceful and efficient way during normal operations,
but maybe this idea pops up at some point.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
It's a pain to recompile the world if gencache.h changes
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Fri Oct 19 18:52:50 CEST 2018 on sn-devel-144
This reflects that the messaging context is also used outside of the
server processes.
The command used for the rename:
find . -name '*.[hc]' -print0 | xargs -0 sed -i 's/server_messaging_context/global_messaging_context/'
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
This reflects that the event context is also used outside of the server
processes.
The command used for the rename:
find . -name '*.[hc]' -print0 | xargs -0 sed -i 's/server_event_context/global_event_context/'
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
exit_server_common() can be called also in smbd processes without a
smbXsrv_client structure, e.g. the parent or some background tasks.
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Thu Jul 26 01:29:38 CEST 2018 on sn-devel-144
This means the pending requests are destroyed before tevent_context
impersonation wrapper are destroyed.
Otherwise, with a pending struct tevent_req that is a child of
client->xconn like this in exit_server_common():
conn[ipv4:127.0.0.11:40745] reason[NT_STATUS_CONNECTION_RESET] at ../source3/smbd/smb2_server.c:4015
full talloc report on 'struct smbXsrv_connection' (total 6085 bytes in 43 blocks)
struct smbd_smb2_request contains 648 bytes in 1 blocks (ref 0) 0x55ed41634740
struct smbd_smb2_request contains 3438 bytes in 32 blocks (ref 0) 0x55ed416331e0
struct tevent_req contains 1824 bytes in 20 blocks (ref 0) 0x55ed41635860
struct smb_filename contains 206 bytes in 2 blocks (ref 0) 0x55ed41635560
lease_v2_complex2.dat contains 22 bytes in 1 blocks (ref 0) 0x55ed4161b950
struct smbd_smb2_create_state contains 1386 bytes in 16 blocks (ref 0) 0x55ed41635a10
struct deferred_open_record contains 804 bytes in 12 blocks (ref 0) 0x55ed41633090
struct defer_open_state contains 764 bytes in 11 blocks (ref 0) 0x55ed41634f10
struct tevent_req contains 748 bytes in 10 blocks (ref 0) 0x55ed41636390
struct tevent_timer contains 96 bytes in 1 blocks (ref 0) 0x55ed41636ad0
struct dbwrap_watched_watch_state contains 420 bytes in 7 blocks (ref 0) 0x55ed41636540
struct tevent_req contains 296 bytes in 5 blocks (ref 0) 0x55ed41636700
struct messaging_filtered_read_state contains 64 bytes in 3 blocks (ref 0) 0x55ed416368b0
struct messaging_dgm_fde contains 8 bytes in 2 blocks (ref 0) 0x55ed41636950
reference to: struct messaging_dgm_fde_ev
we crash when freeing the xconn as the the tevent_req child has a
cleanup function that tries to access a (wrapped) tevent context that
was already destroyed via smb1srv_tcon_disconnect_all() for SMB1 or
smbXsrv_session_logoff_all() for SMB2 a few lines above.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
This is required because we need a new pointer for LDB after the fork,
and with LMDB we can not longer rely on tdb_reopen_all() to do that
for us.
This can not be done in reinit_after_fork() due to the dependency loop
this would create.
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
server_exit does an internal tree disconnect which requires a chdir to
the share directory. In case the file system encountered a problem and
the chdir call returns an error, this triggers a SERVER_EXIT_ABNORMAL
which in turn results in a panic and a coredump. As the log already
indicates the problem (chdir returned an error), avoid the
SERVER_EXIT_ABNORMAL in this case and not trigger a coredump.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13189
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): Sat Dec 16 01:56:06 CET 2017 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 Dec 5 04:58:26 CET 2017 on sn-devel-144
Wrong fix for the problem that was actually fixed in the dbwrap_rbt
code with commits:
590507951f0f46da08e1
This reverts commit 8024e19b70.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Mon Dec 7 21:09:04 CET 2015 on sn-devel-104
The talloc heirarchy looks like this:
global_smbXsrv_client
| |
V V
session_table sconn
|
V
session (destructor references global_smbXsrv_client->sconn)
So don't free global_smbXsrv_client->sconn before the
session destructor fires.
------------------------------------------------
6 <signal handler called>
7 0x00007f47ba82da1a in file_close_user (sconn=0x0, vuid=1584077283) at ../source3/smbd/files.c:250
8 0x00007f47ba922a74 in smbXsrv_session_logoff (session=0x7f47be8bbf80) at ../source3/smbd/smbXsrv_session.c:1404
9 0x00007f47ba921912 in smbXsrv_session_destructor (session=0x7f47be8bbf80) at ../source3/smbd/smbXsrv_session.c:1068
10 0x00007f47b784e2fc in _talloc_free_internal () from /usr/lib/libtalloc.so.2
11 0x00007f47b784f495 in _talloc_free_children_internal () from /usr/lib/libtalloc.so.2
12 0x00007f47b784e49f in _talloc_free_internal () from /usr/lib/libtalloc.so.2
13 0x00007f47b784f495 in _talloc_free_children_internal () from /usr/lib/libtalloc.so.2
14 0x00007f47b784e49f in _talloc_free_internal () from /usr/lib/libtalloc.so.2
15 0x00007f47b784f88e in _talloc_free () from /usr/lib/libtalloc.so.2
16 0x00007f47ba92b2f1 in exit_server_common (how=SERVER_EXIT_NORMAL, reason=0x0) at ../source3/smbd/server_exit.c:234
------------------------------------------------
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11375
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Wed Nov 25 03:40:46 CET 2015 on sn-devel-104
smbd_reinit_after_fork is a simple wrapper around reinit_after_fork that
should be used after forking from the main smbd.
At the moment the only additional step it performs is resetting
am_parent to NULL.
A subsequent commit will make use of this function.
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
What?
This patch gets rid of the central shared memory segment referenced by
"profile_p". Instead, every smbd gets a static profile_area where it collects
profiling data. Once a second, every smbd writes this profiling data into a
record of its own in a "smbprofile.tdb". smbstatus -P does a tdb_traverse on this
database and sums up what it finds.
Why?
At least in my perception sysv IPC has not the best reputation on earth. The
code before this patch uses shmat(). Samba ages ago has developed a good
abstraction of shared memory: It's called tdb.
The main reason why I started this is that I have a request to become
more flexible with profiling data. Samba should be able to collect data
per share or per user, something which is almost impossible to do with
a fixed structure. My idea is to for example install a profile area per
share and every second marshall this into one tdb record indexed by share
name. smbstatus -P would then also collect the data and either aggregate
them or put them into individual per-share statistics. This flexibility
in the data model is not really possible with one fixed structure.
But isn't it slow?
Well, I don't think so. I can't really prove it, but I do believe that on large
boxes atomically incrementing a shared memory value for every SMB does show up
due to NUMA effects. With this patch the hot code path is completely
process-local. Once a second every smbd writes into a central tdb, this of
course does atomic operations. But it's once a second, not on every SMB2 read.
There's two places where I would like to improve things: With the current code
all smbds wake up once a second. With 10,000 potentially idle smbds this will
become noticable. That's why the current only starts the timer when something has
changed.
The second place is the tdb traverse: Right now traverse is blocking in the
sense that when it has to switch hash chains it will block. With mutexes, this
means a syscall. I have a traverse light in mind that works as follows: It
assumes a locked hash chain and then walks the complete chain in one run
without unlocking in between. This way the caller can do nonblocking locks in
the first round and only do blocking locks in a second round. Also, a lot of
syscall overhead will vanish. This way smbstatus -P will have almost zero
impact on normal operations.
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Volker Lendecke <vl@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
We can't reference xconn->next after it was talloc_free'ed
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Fri Oct 10 14:32:53 CEST 2014 on sn-devel-104
This structure is supposed to hold the global state shared between
multiple connections from the same client.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
This prepares the structures for multi-channel support.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
This prepares the structures for multi-channel support.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
If this isn't NT_STATUS_OK, we skip any io on the socket.
This avoids possible problems during shutdown.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Signed-off-by: Richard Sharpe <realrichardsharpe@gmail.com>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Wed Mar 27 22:58:37 CET 2013 on sn-devel-104
