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* messaging3: Make messaging_context privateVolker Lendecke2014-05-311-21/+0
| | | | | Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
* messaging3: Add and use messaging_tevent_context()Volker Lendecke2014-05-311-0/+2
| | | | | Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
* messaging3: Introduce messaging_local_backend()Volker Lendecke2014-05-311-0/+2
| | | | | Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
* messaging3: The backend send_fn doesn't need a messaging_contextVolker Lendecke2014-05-311-1/+1
| | | | | Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
* s3:messaging: change messaging_backend to use iovec instead of data blob in ↵Michael Adam2014-05-301-1/+1
| | | | | | | | | | | | | | | send_fn This also changes the layering messaging_send_iov -> messaging_send_buf -> messaging_send to messaging_send_buf -> messaging_send -> messaging_send_iov Signed-off-by: Michael Adam <obnox@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
* messaging3: Add messaging_dgm_register_tevent_contextVolker Lendecke2014-05-081-0/+3
| | | | | | Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
* messaging3: Add messaging_filtered_readVolker Lendecke2014-05-081-0/+8
| | | | | | | | This delegates the decision whether to read a message to a callback Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
* messaging3: Fix messaging_read_send/recvVolker Lendecke2014-04-301-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | messaging_read_send/recv was okay for just one handler in the queue. For multiple handlers it was pretty broken. A handler that deletes itself as part of the callback (pretty typical use case...) drops the message for a subsequent handler that responds to the same message type. In messaging_dispatch_rec we walk the array, however messaging_read_cleanup has already changed the array. tevent_req_defer_callback does not help here: It only defers the callback, it does not defer the cleanup function. This also happens when a callback deletes a different handler A handler that re-installs itself in the callback might get a message twice. This patch changes the code such that only messaging_dispatch_rec adds records to msg_ctx->waiters, new waiters are put into a staging area first (msg_ctx->new_waiters). Also messaging_read_cleanup does not move anything around in msg_ctx->waiters, it only nulls out itself. messaging_dispatch_rec is changed to cope with this. Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
* s3: messaging: Add infrastructure to clean up orphaned sockets every 15 ↵Volker Lendecke2014-04-231-0/+2
| | | | | | | minutes as a background task. Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
* messaging_dgm: Add messaging_dgm_wipeVolker Lendecke2014-04-231-0/+1
| | | | | | | This walks all sockets and wipes the left-overs Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
* messaging3: Add messaging_send_iovVolker Lendecke2014-04-231-0/+3
| | | | | | | | This uses a copy, will be replaced by a direct iovec call through to sendmsg on the unix domain socket Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
* lib: Remove messages_localVolker Lendecke2014-04-231-12/+0
| | | | | Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
* lib: Add messaging_dgmVolker Lendecke2014-04-231-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* s3: messages: Implement cleanup of dead records.Jeremy Allison2014-04-031-0/+6
| | | | | | | | | | | | 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>
* s3:build: remove global CLUSTER_SUPPORT defineStefan Metzmacher2014-03-241-4/+0
| | | | | | | | | | 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
* messaging3: Remove unused messaging_tdb_eventVolker Lendecke2014-01-211-3/+0
| | | | | | | | 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): Tue Jan 21 10:07:21 CET 2014 on sn-devel-104
* messaging3: Add messaging_read_send/recvVolker Lendecke2014-01-211-0/+10
| | | | | | | | | | | | | | | | | | | This is made to replace the msg_channel abstraction. msg_channel was created to not miss any messages. For this, some complex queueing was installed. This complexity has caused quite a few problems in the past (see bug 10284 for example). messaging_read_send/recv is able to achieve the same goal with a lot less complexity. The messaging_read_send atomically installs the reader into the messaging_context, we will not miss any messages while this installed. messaging_send_recv will deinstall that listener, but in the callback function you can directly call messaging_read_send again without going through the tevent_loop_once. As long as this is always made sure, no messages will be lost. Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
* s3:include: fix messaging_send_buf() protype in messages.hStefan Metzmacher2013-10-171-1/+1
| | | | | | | | The function already used 'uint8_t' instead of 'uint8'. Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Andrew Bartlett <abartlet@samba.org>
* s3:lib: s/struct event_context/struct tevent_contextStefan Metzmacher2013-02-191-2/+2
| | | | | Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Michael Adam <obnox@samba.org>
* s3: Add messaging_tdb_event()Volker Lendecke2012-04-171-0/+3
| | | | | | | | This is a void* that represents a signal handler attached to some custom tevent_context. This is necessary to make the tdb based messaging infrastructure trigger its business when we are sitting in tevent_loop_once for an event context that is not the main one in the messaging context.
* s3:lib/messages: remove unused messaging_event_context()Stefan Metzmacher2012-01-171-1/+0
| | | | | | | metze Autobuild-User: Stefan Metzmacher <metze@samba.org> Autobuild-Date: Tue Jan 17 09:45:30 CET 2012 on sn-devel-104
* s3: Remove a bunch of calls to procid_self()Volker Lendecke2011-12-121-3/+1
| | | | All callers to messaging_[re]init only used procid_self()
* s3: factor out messaging_send_to_children()Gregor Beck2011-10-121-0/+1
| | | | Signed-off-by: Michael Adam <obnox@samba.org>
* s3: Fix some nonempty blank linesVolker Lendecke2011-09-131-3/+3
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* s3-messaging: Change classification of MSG_SMB_CONF_UPDATED.Simo Sorce2011-08-111-1/+0
| | | | | | | | smbd is not the only daemon interested in smb.conf changes. Move this message to the GENERAL class so that all interested partied (nmbd, winbindd, spoolssd, etc..) can receive this notification. Signed-off-by: Andreas Schneider <asn@samba.org>
* s3-messaging: Fix messaging classes.Simo Sorce2011-08-111-1/+1
| | | | | | | | | | | | This has been broken since ff0ac5b0 (May 2007). Basically all messages were belonging to the General class except for CTDB messages. This fixed the message_send_all() function to correctly compute the class, and fixes registrations to include all they need to cope with the fact not all messages are of calss general (registrations rotted a bit because as long as FLAG_MSG_GENERAL was defined the process woould receive all messages). Signed-off-by: Andreas Schneider <asn@samba.org>
* s3-messaging: Remove obsolete class.Simo Sorce2011-08-111-1/+1
| | | | | | | The FLAG_MSG_PRINT_NOTIFY class is actually obsolete and never used, as the only message belonging to it is not used either. Signed-off-by: Andreas Schneider <asn@samba.org>
* lib/util Bring procid_str() into lib/util as server_id_string()Andrew Bartlett2011-06-091-7/+0
| | | | | | | This is needed for OpenChange, which prints Samba struct server_id values in debug messages. Andrew Bartlett
* s3-messages: make ndr_messaging.h part of messages.h.Günther Deschner2011-03-301-0/+2
| | | | Guenther
* s3: add server_id.idl and use only autogenerated code.Günther Deschner2011-02-171-8/+1
| | | | | | | | | Volker, Tridge and other clustering gurus, please check. It is ok to get rid of ifdef CLUSTER_SUPPORT here, right ? Why was unique_id not marshalled at all ? Guenther
* s3: Remove talloc_autofree_context() from messaging_tdb_parent_init()Volker Lendecke2010-09-261-1/+1
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* s3: messaging_ctdbd_connection() was only called with procid_self()Volker Lendecke2010-08-311-1/+1
| | | | Eventually we'll get this right...
* s3: Add messaging_server_idVolker Lendecke2010-07-051-0/+2
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* s3: Pass procid_self() explicitly to messaging_ctdbd_connection()Volker Lendecke2010-07-051-1/+1
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* s3: Re-initialize the server_id in messaging_reinitVolker Lendecke2010-07-041-1/+2
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* s3: Make sure our CLEAR_IF_FIRST optimization works for messaging.tdbVolker Lendecke2010-03-251-0/+2
| | | | | | In the child, we fully re-open messaging.tdb, which leads to one fcntl lock for CLEAR_IF_FIRST detection per smbd. This opens the tdb in the parent and holds it, so that tdb_reopen_all correctly catches the CLEAR_IF_FIRST bit.
* s3: Fix a long-standing problem with recycled PIDsVolker Lendecke2010-03-101-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When a samba server process dies hard, it has no chance to clean up its entries in locking.tdb, brlock.tdb, connections.tdb and sessionid.tdb. For locking.tdb and brlock.tdb Samba is robust by checking every time we read an entry from the database if the corresponding process still exists. If it does not exist anymore, the entry is deleted. This is not 100% failsafe though: On systems with a limited PID space there is a non-zero chance that between the smbd's death and the fresh access, the PID is recycled by another long-running process. This renders all files that had been locked by the killed smbd potentially unusable until the new process also dies. This patch is supposed to fix the problem the following way: Every process ID in every database is augmented by a random 64-bit number that is stored in a serverid.tdb. Whenever we need to check if a process still exists we know its PID and the 64-bit number. We look up the PID in serverid.tdb and compare the 64-bit number. If it's the same, the process still is a valid smbd holding the lock. If it is different, a new smbd has taken over. I believe this is safe against an smbd that has died hard and the PID has been taken over by a non-samba process. This process would not have registered itself with a fresh 64-bit number in serverid.tdb, so the old one still exists in serverid.tdb. We protect against this case by the parent smbd taking care of deregistering PIDs from serverid.tdb and the fact that serverid.tdb is CLEAR_IF_FIRST. CLEAR_IF_FIRST does not work in a cluster, so the automatic cleanup does not work when all smbds are restarted. For this, "net serverid wipe" has to be run before smbd starts up. As a convenience, "net serverid wipedbs" also cleans up sessionid.tdb and connections.tdb. While there, this also cleans up overloading connections.tdb with all the process entries just for messaging_send_all(). Volker
* s3:messages: finally make message_dispatch() staticStefan Metzmacher2009-01-221-1/+0
| | | | metze
* Share data_blob implementation.Jelmer Vernooij2008-10-121-4/+3
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* messaging: move types to IDL.Günther Deschner2008-09-121-85/+0
| | | | | Guenther (This used to be commit 6c346d0eb20af5ba9b09f30319420f7c91480da6)
* Allow server manager to close open files selected by id.Jeremy Allison2008-05-271-0/+4
| | | | | Jeremy. (This used to be commit 7eeed8bb41059ec2bddedb6a71deddeec7f33af2)
* messaging: add MSG_DBWRAP_TDB2_CHANGES flagStefan Metzmacher2008-04-121-0/+3
| | | | | metze (This used to be commit 7418c3ab1d8f18403f5a43817b2cc14e15090fca)
* messaging: add FLAG_MSG_DBWRAP message class flagStefan Metzmacher2008-04-121-0/+2
| | | | | metze (This used to be commit ee6325495f48bab43a37d740a6eca57192004d57)
* Add dump-domain-list command for debugging winbindd's domain_list.Günther Deschner2008-01-241-0/+1
| | | | | Guenther (This used to be commit 10fa43f2840899c0854763e55b9174827c522a5b)
* RIP BOOL. Convert BOOL -> bool. I found a few interestingJeremy Allison2007-10-181-1/+1
| | | | | | | | bugs in various places whilst doing this (places that assumed BOOL == int). I also need to fix the Samba4 pidl generation (next checkin). Jeremy. (This used to be commit f35a266b3cbb3e5fa6a86be60f34fe340a3ca71f)
* r24843: Add a "validate-cache" control message to winbindd.Michael Adam2007-10-101-0/+1
| | | | | | | | | | | | So there is a new subcommand "smbcontrol winbindd validate-cache" now. This change provides the infrastructure: The function currently returns "true" unconditionally. The call of a real cache validation function will be incorporated in subsequent changes. Michael (This used to be commit ef92d505c04397614cb0dd5ede967e9017a5e302)
* r24021: use MSG_BROADCAST_PID_STR as value for broadcast messagesStefan Metzmacher2007-10-101-1/+5
| | | | | | | | | to fix the cluster case vl: please check, if this works with clustering = no metze (This used to be commit 9d4104b8d5773537f2271f7be1439f1da1e0bf42)
* r23784: use the GPLv3 boilerplate as recommended by the FSF and the license textAndrew Tridgell2007-10-101-2/+1
| | | | (This used to be commit b0132e94fc5fef936aa766fb99a306b3628e9f07)
* r23779: Change from v2 or later to v3 or later.Jeremy Allison2007-10-101-1/+1
| | | | | Jeremy. (This used to be commit 407e6e695b8366369b7c76af1ff76869b45347b3)
* r23563: Add dump-event-list command to smbcontrol.Günther Deschner2007-10-101-0/+3
| | | | | Guenther (This used to be commit 0d956a8e45cd4421cddb8e077e1960dafac3a4d0)
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