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2017-12-05lib: Remove unused serverid.tdbVolker Lendecke1-49/+0
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
2017-12-05messaging: Remove the "n_sent" arg from message_send_allVolker Lendecke1-2/+1
The only user of this is an informative message in smbcontrol. I don't think that's worth the effort. Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2016-07-28lib: Move "message_send_all" to serverid.cVolker Lendecke1-0/+18
Trying to trim down messages.c a bit: Sending to all processes that are registered in serverid.tdb and filtering to me is not really logic of general messaging but more of the serverid code. Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Ralph Boehme <slow@samba.org>
2016-04-25lib: serverid.h references struct server_idVolker Lendecke1-0/+1
Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Ralph Boehme <slow@samba.org>
2015-10-28lib: Remove a includes.h referenceVolker Lendecke1-1/+1
Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Michael Adam <obnox@samba.org>
2015-10-19lib: Remove unused serverid_get_random_unique_idVolker Lendecke1-6/+0
Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Ralph Boehme <slow@samba.org> Autobuild-User(master): Volker Lendecke <vl@samba.org> Autobuild-Date(master): Mon Oct 19 15:12:22 CEST 2015 on sn-devel-104
2015-09-30lib: Remove serverids_existVolker Lendecke1-5/+0
The only reason for this complex monster was an overload of ctdbd. When opening files, we unconditionally checked all share modes for validity. This meant thousands of serverid_exists calls per second for popular directories. This has long gone, now we only check for validity if a conflict happens. The only remaining caller is net serverid wipedbs, an administrative command. If that loads ctdbd, so be it. Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2014-07-31lib: Remove unused serverid_register_msg_flags()Volker Lendecke1-6/+0
Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Michael Adam <obnox@samba.org>
2013-09-10lib: serverid.h needs "struct db_record" declarationVolker Lendecke1-0/+1
Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2012-08-17s3:lib: implement serverid_equal() as macro of server_id_equal()Stefan Metzmacher1-2/+0
metze
2012-06-21s3:move serverid_equal() to serverid.cMichael Adam1-0/+2
Signed-off-by: Stefan Metzmacher <metze@samba.org>
2012-04-30s4-messaging: Fill in the whole server_id in all use casesAndrew Bartlett1-3/+0
This started per https://bugzilla.samba.org/show_bug.cgi?id=8872#c4 and avoids any possible collision with a different process. We also need to ensure that across a Samba installation on a single node that id.vnn is the same. Samba4 previously used 0, while Samba3 used NONCLUSTER_VNN. When a message is sent between these 'different' nodes, the error NT_STATUS_INVALID_DEVICE_REQUEST is raised. Andrew Bartlett
2012-02-15s3: Add SERVERID_UNIQUE_ID_NOT_TO_VERIFY, bug 8760Volker Lendecke1-0/+9
Autobuild-User: Jeremy Allison <jra@samba.org> Autobuild-Date: Wed Feb 15 21:10:22 CET 2012 on sn-devel-104
2011-10-27s3: Add serverids_existVolker Lendecke1-0/+5
2010-09-26s3: Remove talloc_autofree_context() from serverid_parent_init()Volker Lendecke1-1/+1
2010-07-04s3: Replace register_message_flags() with serverid_register_msg_flags()Volker Lendecke1-0/+6
message_send_all is now done by walking the serverid.tdb, not the connections.tdb anymore. Günther, Simo, please check!
2010-07-04s3: Remove serverid_[de]register_selfVolker Lendecke1-12/+2
This removes some deep references to procid_self()
2010-03-25s3: Make sure our CLEAR_IF_FIRST optimization works for serverid.tdbVolker Lendecke1-0/+5
In the child, we fully re-open serverid.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.
2010-03-10s3: Fix a long-standing problem with recycled PIDsVolker Lendecke1-0/+66
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
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