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Commit Graph

16 Commits

Author SHA1 Message Date
Guenter Kukkukk
e8e3a68729 Fix the build: net_serverid.c has 3 wrong format strings for 64bit vars
On two of my opensuse machines i get 3 errors, e.g.:
../source3/utils/net_serverid.c:333:3: error: format ‘%lu’ expects argument of type ‘long unsigned int’, but argument 5 has type ‘uint64_t’ [-Werror=format]
cc1: some warnings being treated as errors

Signed-off-by: Guenter Kukkukk <kukks@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Tue Mar  5 22:49:03 CET 2013 on sn-devel-104
2013-03-05 22:49:02 +01:00
Gregor Beck
5ab7725974 s3:net: new implementation of "servid wipedbs" with smbXsrv_*
Signed-off-by: Gregor Beck <gbeck@sernet.de>
Reviewed-by: Michael Adam <obnox@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>

Autobuild-User(master): Michael Adam <obnox@samba.org>
Autobuild-Date(master): Tue Feb 19 13:56:57 CET 2013 on sn-devel-104
2013-02-19 13:56:57 +01:00
Gregor Beck
5a4ffb20ff s3:net_serverid: remove connections_forall from "net serverid wipedbs"
This tdb will go away.

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Michael Adam <obnox@samba.org>
2012-10-19 12:15:01 +02:00
Gregor Beck
2f2cb2f689 s3:net_serverid: remove sessionid_traverse from "net serverid wipedbs"
This tdb will go away.

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Michael Adam <obnox@samba.org>
2012-10-19 12:15:01 +02:00
Stefan Metzmacher
8693a4fff9 s3:lib: split things into a conn_tdb.h
metze

Autobuild-User: Stefan Metzmacher <metze@samba.org>
Autobuild-Date: Tue Jun  5 19:28:35 CEST 2012 on sn-devel-104
2012-06-05 19:28:35 +02:00
Michael Adam
c8924ecc41 s3:net: convert net serverid to only use dbwrap wrapper functions
Avoid direct use of the db_record and db_context structs.
2011-10-11 14:17:56 +02:00
Michael Adam
5bfdd73a64 s3:net: fix the exit code of net serverid wipe 2011-10-11 14:17:56 +02:00
Michael Adam
86455646e3 s3:net: fix the exit code of net serverid list 2011-10-11 14:17:56 +02:00
Michael Adam
0b5c4a601a s3:dbwrap: move all .c and .h files of dbwrap to lib/dbwrap/
Autobuild-User: Michael Adam <obnox@samba.org>
Autobuild-Date: Fri Jul 29 13:34:22 CEST 2011 on sn-devel-104
2011-07-29 13:34:22 +02:00
Rusty Russell
5a7874e119 tdb_traverse/tdb_traverse_read: check returns for negative, not -1.
TDB2 returns a negative error number on failure.  This is compatible
if we always check for < 0 instead of == -1.

Also, there's no tdb_traverse_read in TDB2: we don't try to make
traverse reliable any more, so there are no write locks anyway.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2011-06-20 11:18:35 +02:00
Andrew Bartlett
16b1c77644 lib/util Bring procid_str() into lib/util as server_id_string()
This is needed for OpenChange, which prints Samba struct server_id
values in debug messages.

Andrew Bartlett
2011-06-09 12:40:09 +02:00
Günther Deschner
ea29261186 s3-sessionid: avoid global include of sessionid.h
Guenther

Autobuild-User: Günther Deschner <gd@samba.org>
Autobuild-Date: Wed Mar  2 12:58:12 CET 2011 on sn-devel-104
2011-03-02 12:58:12 +01:00
Günther Deschner
8643683dd8 s3-server_id: only include server_id where needed.
Guenther
2011-03-02 12:12:31 +01:00
Andrew Bartlett
09c4a5cd9b s3-cluster Always fill in the clustering vnn element
This avoids this structure being partially uninitialised.

Adnrew Bartlett
2011-02-17 16:02:19 +01:00
Günther Deschner
7a05ca2c9c s3-build: use dbwrap.h only where needed.
Guenther
2010-08-26 00:25:55 +02:00
Volker Lendecke
89c785c47a s3: Fix a long-standing problem with recycled PIDs
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
2010-03-10 16:07:10 +01:00