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On systems with 32 bit offsets, expansion and fcntl locking on these records
will fail anyway. SAMBA already does '#define _FILE_OFFSET_BITS 64' in
config.h (on my 32-bit x86 Linux system at least) to get 64 bit file offsets.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
(cherry picked from samba commit 252f7da702fd0409f7bfff05ef594911ededa32f)
Signed-off-by: Stefan Metzmacher <metze@samba.org>
(This used to be ctdb commit 2d768f664e6db65b3b7e0c732f33ee2b806892f9)
This might be a bit less efficient, but experience in winbind has shown that
event callbacks can trigger changes in the socket state in very hard to
diagnose ways.
(This used to be ctdb commit a78b8ea7168e5fdb2d62379ad3112008b2748576)
add the __location__ macro to the logs to get a better idea
in which loop the problem occured
Signed-off-by: Christian Ambach <christian.ambach@de.ibm.com>
(This used to be ctdb commit dccb549fd6a6e338063699544e52f2a1a6a966b5)
As we start to use errno more, it's a huge pain if talloc_free() can blatt
it (esp. destructors).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
(This used to be ctdb commit 76a0ca77feba14e1e1162c195ffbdf516e62aa4d)
It is unlikely we will need something this verbose for normal troubleshooting.
This allows us to keep a significantly longer time interval of log messages
in the 500k slots available in the ringbuffer.
(This used to be ctdb commit cc99c05c0c6484ad574039a454e6133852cb41fa)
add a global variable holding the pid of the main daemon.
change the tracking of time() in the event loop to only check/warn when called from the main daemon
(This used to be ctdb commit a10fc51f4c30e85ada6d4b7347b0f9a8ebc76637)
log an error if the clock jumps backwards
also log an error if the clock jumps >5 seconds forward (we assume here we will get at least one event every 5 seconds)
(This used to be ctdb commit 11193e1e192bee6f579bdf1303153571a82711d7)
The flags are user-visible, via tdb_get_flags/add_flags/remove_flags.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
(This used to be ctdb commit 8f48e37c254e0852d4e2dea54b905ce5ef2b925d)
This version just wraps the reopen code, so we still re-grab the lock and do
the normal sanity checks.
The reason we do this at all is to avoid global fd limits, see:
http://forums.fedoraforum.org/showthread.php?t=210393
Note also that this whole reopen concept is fundamentally racy: if the parent
goes away before the child calls tdb_reopen_all, the database can be left
without an active lock and another TDB_CLEAR_IF_FIRST opener will clear it.
A fork_with_tdbs() wrapper could use a pipe to solve this, but it's hardly
elegant (what if there are other independent things which have similar needs?).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
(This used to be ctdb commit 8d0d432ab7766d9c0f9868fd77e48b9b5cc5d9f9)
Make tdb transaction lock recursive (samba version)
This patch replaces 6ed27edbcd3ba1893636a8072c8d7a621437daf7 and
1a416ff13ca7786f2e8d24c66addf00883e9cb12, which fixed the bug where traversals
inside transactions would release the transaction lock early.
This solution is more general, and solves the more minor symptom that nested
traversals would also release the transaction lock early. (It was also suggestd in
Volker's comment in 6ed27ed).
This patch also applies to ctdb, if the traverse.c part is removed (ctdb's tdb
code never received the previous two fixes).
Tested using the testsuite from ccan (adapted to the samba code). Thanks to
Michael Adam for feedback.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Michael Adam <obnox@samba.org>
commit 760104188d0d2ed96ec4a70138e6d0bf86d797ed
Author: Rusty Russell <rusty@rustcorp.com.au>
Date: Tue Jul 21 16:23:35 2009 +0930
tdb: fix locking error
54a51839ea65aa788b18fce8de0ae4f9ba63e4e7 "Make tdb transaction lock
recursive (samba version)" was broken: I "cleaned it up" and prevented
it from ever unlocking.
To see the problem:
$ bin/tdbtorture -s 1248142523
tdb_brlock failed (fd=3) at offset 8 rw_type=1 lck_type=14 len=1
tdb_transaction_lock: failed to get transaction lock
tdb_transaction_start failed: Resource deadlock avoided
My testcase relied on the *count* being correct, which it was. Fixing that
now.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Michael Adam <obnox@samba.org>
(This used to be ctdb commit ce19658ba13272238058e9b9bc03e62f48b737c0)
overallocate all records by 25%
This greatly reduces the fragmentation of databases where records
tend to grow slowly by a small amount each time. The case where this
is most seen is the ldb index records. Adding this overallocation
reduced the size of the resulting database by more than 20x when
running a test that adds 10k users.
(This used to be ctdb commit e72974e5cefabc7035399d16633f727f868caa61)
auto-repack in transactions that expand the tdb
The idea behind this is to recover from badly fragmented free
lists. Choosing the point where the file expands is fairly arbitrary,
but seems to work well.
(This used to be ctdb commit 233c52bfb087f636ad61e95c12616c02901f4f83)
imported the tdb_repack() code from CTDB
The tdb_repack() function repacks a TDB so that it has a single
freelist entry. The file doesn't shrink, but it does remove all
freelist fragmentation. This code originated in the CTDB vacuuming
code, but will now be used in ldb to cope with fragmentation from
re-indexing
(This used to be ctdb commit fe3ceb101a5a9c336973c2c6c31406bd8181c2fe)
make TDB_NOSYNC affect all the fsync/msync calls in transactions
During a transaction commit tdb normally uses fsync/msync calls to
make it crash safe. This can be disabled using the TDB_NOSYNC flag,
but it wasn't disabling all the code paths that caused a fsync/msync.
(This used to be ctdb commit e03980add02a28609a7a0a0c87ebc85419b98144)
commit b90863c0b7b860b006ac49c9396711ff351f777f
Author: Howard Chu <hyc@highlandsun.com>
Date: Tue Mar 31 13:15:54 2009 +1100
Add tdb_transaction_prepare_commit()
Using tdb_transaction_prepare_commit() gives us 2-phase commits. This
allows us to safely commit across multiple tdb databases at once, with
reasonable transaction semantics
Signed-off-by: tridge@samba.org
(This used to be ctdb commit 4c3dac215a088947f645f727343997f5d47e3260)
Make the default be that transaction is not allowed and any attempt to create a nested transaction will fail with TDB_ERR_NESTING.
If an application can cope with transaction nesting and the implicit
semantics of tdb_transaction_commit(), it can enable transaction nesting
by using the TDB_ALLOW_NESTING flag.
(This used to be ctdb commit 3e49e41c21eb8c53084aa8cc7fd3557bdd8eb7b6)
This fixes the autoconf 2.63 warning
"suspicious cache-id, must contain _cv_ to be cached".
Thanks to William Jojo <w.jojo@hvcc.edu> for reporting.
Michael
(This used to be ctdb commit f7be553ed0826d31759812d58db91589ccdf8a8c)
Signed-off-by: Andreas Schneider <anschneider@suse.de>
(cherry picked from commit b39611c36bb904774fd4032bf2f8003fbdeb5d34)
Signed-off-by: Michael Adam <obnox@samba.org>
(This used to be ctdb commit 02893e04154c0590b235082c5a6e5726ceb25dba)
matches commit 7aae6dd80e265aa9402ed507caaff4a5dba55069 in the kernel.
Many thanks to Jim Houston for pointing out this fix to us
(This used to be ctdb commit 85f6032cbdb197f3a003d86f086afa2cee898a4d)
make ctdb uptime print how long the recovery took
in the recovery daemon when we check that the public ip address
allocation on the local node is correct (we have the ips we should have
and we dont have any we shouldnt have) use ctdb uptime and check the
recovery start/stop times and make sure we dont check for ip allocation
inconsistencies during a recovery where the ip address allocation is in flux.
(This used to be ctdb commit f86551580349b7f662f9a07e4eb0c1189e38e429)
for stores into persistent databases, ALWAYS use a lockwait child take out the lock for the record and never the daemon itself.
(This used to be ctdb commit 7fb6cf549de1b5e9ac5a3e4483c7591850ea2464)
in those cases we accept that we couldnt get a transaction and then just writes the data "unsafely" anyway.
(This used to be ctdb commit 56af7df33456bf10d19b97cb005257720ac0b610)
This takes advantage of the fact that we can do left merges but not right merges
By allocating data from the end of the freelist entry rather than the beginning
we can guarantee that if we immediately free the record again it will be merged
with the previous freelist entry, reducing fragmentation
(This used to be ctdb commit 6d159f2c115dd5e9b8bab8798f7ac710b4427593)
