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While studying tdb, I've noticed a couple of mismatches between readme
and actual code:
- tdb_open_ex changed it's log_fn argument to log_ctx
- there is now no tdb_update(), which it seems was transformed into
non-exported tdb_update_hash()
There were other mismatches, but I don't remember them now, sorry.
Signed-off-by: Kirill Smelkov <kirr@mns.spb.ru>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
The reason I do it is that when using older python-tdb as shipped in
Debian Lenny, python interpreter crashes on this test:
(gdb) bt
#0 0xb7f8c424 in __kernel_vsyscall ()
#1 0xb7df5640 in raise () from /lib/i686/cmov/libc.so.6
#2 0xb7df7018 in abort () from /lib/i686/cmov/libc.so.6
#3 0xb7e3234d in __libc_message () from /lib/i686/cmov/libc.so.6
#4 0xb7e38624 in malloc_printerr () from /lib/i686/cmov/libc.so.6
#5 0xb7e3a826 in free () from /lib/i686/cmov/libc.so.6
#6 0xb7b39c84 in tdb_close () from /usr/lib/libtdb.so.1
#7 0xb7b43e14 in ?? () from /var/lib/python-support/python2.5/_tdb.so
#8 0x0a038d08 in ?? ()
#9 0x00000000 in ?? ()
master's pytdb does not (we have a check for self->closed in obj_close()),
but still...
Signed-off-by: Kirill Smelkov <kirr@mns.spb.ru>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
So that erroneous double tdb_close() calls do not try to close() same
fd again. This is like SAFE_FREE() but for fd.
Signed-off-by: Kirill Smelkov <kirr@mns.spb.ru>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We no longer use swig for pytdb, so there is no need for swig make
rules. Also pytdb.c header should be updated.
Signed-off-by: Kirill Smelkov <kirr@mns.spb.ru>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
ctdb wants a quick way to detect corrupt tdbs; particularly, tdbs with
loops in their hash chains. tdb_check() provides this.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
It was a regrettable hack which I used to reduce line count in tdb; in fact it caused confusion as can be seen in this patch.
In particular, ecode now needs to be set before TDB_LOG anyway, and having it exposed in
the header is useless (the struct tdb_context isn't defined, so it's doubly useless).
Also, we should never set errno, as io.c was doing.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
When TDB_TRACE is defined (in tdb_private.h), verbose tracing of tdb operations is enabled.
This can be replayed using "replay_trace" from http://ccan.ozlabs.org/info/tdb.
The majority of this patch comes from moving internal functions to _<funcname> to
avoid double-tracing. There should be no additional overhead for the normal (!TDB_TRACE)
case.
Note that the verbose traces compress really well with rzip.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
There was a race condition that caused the torture.tdb to be left in a
state that needed recovery. The torture code thought that any message
from the tdb code was an error, so the "recovered" message, which is a
TDB_DEBUG_TRACE message, marked the run as being an error when it
isn't.
We previously only allowed a commit to happen after a prepare
commit. It is in fact safe to allow reads between a prepare and a
commit, and the s4 replication code can make use of that, so allow it.
USAGE: abi_checks.sh LIBRARY_NAME header1 [header2 ...]
This creates symbol signature lists using the mksyms and mksigs scripts
and compares them with the checked in lists.
Michael
This produces output like the output gcc produces when
invoked with the -aux-info switch.
Run like this: cat include/tdb.h | ./script/mksigs.pl
This simple parser is probably too coarse to handle all
possible header files, but it treats tdb.h correctly...
Michael
over the 2G offset on systems which support 64 bit file offsets. This fixes
that case.
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>
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 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 reverts commit e17df483fbedb81aededdef5fbb6ae1d034bc2dd.
tdb_reopen_all also restores the active lock, required for TDB_CLEAR_IF_FIRST.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
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 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>
This is a first attempt at exporting symbols only for public functions
We also provide a rudimentary ABI checker that tries to check that
function signatures are not changed by mistake.
Given our use of macros this is not an API checker.
It's all based on tdb.h contents and the gcc -aux-info option
