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* Add protection against EINTR.
* Truncate the file after expand failure, ENOSPC
* Use posix_fallocate() to expand the file
* Fix GCC compiler warnings
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Thu Aug 24 21:17:48 CEST 2017 on sn-devel-144
This should be significantly faster than pwriting.
openbsd doesn't have posix_fallocate, so we do need the fallback. Also, it
might have weird failure modes, so we keep the old code in place except for
posix_fallocate returning success or ENOSPC.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Thu Aug 24 05:38:49 CEST 2017 on sn-devel-144
More README.Coding, but I need "ret" in the next commit as well :-)
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Without this it's very easy to create virtually huge files: ftruncate expands a
file, the pwrites fail with ENOSPC, thus the write fails. The next writer runs
into the same situation, and ftruncate-expands the file even further. tdb_check
will then spend ages reading the 4GB of zeros byte by byte.
Here we hold the freelist lock or are inside a transaction, so it is safe to
cut the file again. Nobody can have used the space that we have tried to
allocate, so we can't have any stray pointers corrupting the database.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This checks for posix_fallocate unless we are sitting on an ancient glibc.
With this we don't need HAVE_BROKEN_POSIX_FALLOCATE anymore,
HAVE_POSIX_FALLOCATE will only be defined if we have a valid [g]libc.
./configure tested on Debian, FreeBSD (which does have posix_fallocate) and
OpenBSD (which does not have posix_fallocate). Also tested with changing the
not have an old-enough glibc around. All did the right thing.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Due to the non-fixable bug in the BUCKET macro tdbtool list printed some
other hash chainlist, not the freelist.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=12888
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
The following C program demonstrates the issue:
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdbool.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <dirent.h>
#include <sys/types.h>
int main(int argc, char **argv)
{
int hash = -1;
int tsize_signed = 10;
unsigned int tsize_unsigned = 10;
int bucket;
#define BUCKET(hash, tsize) ((hash) % (tsize))
bucket = BUCKET(hash, tsize_unsigned);
printf("hash [%d] tsize [%d] bucket [%d]\n", hash, tsize_unsigned, bucket);
bucket = BUCKET(hash, tsize_signed);
printf("hash [%d] tsize [%d] bucket [%d]\n", hash, tsize_signed, bucket);
return 0;
}
Output:
$ ./tmp
hash [-1] tsize [10] bucket [5]
hash [-1] tsize [10] bucket [-1]
The first version is what the current BUCKET() macro does. As a result
we lock the hashtable chain in bucket 5, NOT the freelist.
-1 is sign converted to an unsigned int 4294967295 and
4294967295 % 10 = 5.
As all callers will lock the same wrong list consistently locking is
still consistent.
Stumpled across this when looking at the output of `tdbtool DB list`
which always printed some other hashchain and not the freelist.
The freelist bucket offset computation doesn't use the BUCKET macro in
freelist.c (directly or indirectly) when working on the freelist, it
just directly uses the FREELIST_TOP define, so this problem only affects
tdbtool list.
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
The variable stores the hashtable bucket, not the hash. No change in
behaviour.
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This is another level of indentation, but it took me a while staring at the
if-condition to find that "locked" was assigned the result of "==0", not the
return value of tdb_nest_lock().
Best viewed with "git show -b".
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Log failure and exit if fork() or setsid() fails.
Leave the logic in the non-setsid() code as it is. This is probably
meant to fall through on failure of either opening /dev/tty or
ioctl(). Documentation for the ioctl() failure case is far from
clear.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Thu Aug 17 11:48:32 CEST 2017 on sn-devel-144
Switch to using DBG_ERR(), wrap logging/sd_notifyf() lines.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Andreas Schneider <asn@samba.org>
no_process_group -> no_session, name -> daemon, drop _PUBLIC_.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Andreas Schneider <asn@samba.org>
Rename argument no_process_group to no_session to describe what it
actually does. Consistently use "daemon" for name of daemon argument.
Add documentation.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Andreas Schneider <asn@samba.org>
This fixes a GCC warning.
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Thu Aug 10 02:26:09 CEST 2017 on sn-devel-144
This fixes CID 1415704
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Thu Aug 3 15:06:34 CEST 2017 on sn-devel-144
Uses the core of CTDB's create_pidfile_context() for
pidfile_path_create(). pidfile_fd_close() is a subset of CTDB's
pidfile_context_destructor().
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Volker Lendecke <vl@samba.org>
This causes a race. If 2 callers to pidfile_create() both a find a
stale PID file using pidfile_pid(). The 1st may then return to
pidfile_create() and create a new PID file, which can then be unlinked
by the 2nd caller.
Consequently, PID file creation can not depend on creating the file,
so drop O_EXCL from the call to open().
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Volker Lendecke <vl@samba.org>
The pytalloc-util dependency logic in lib/talloc/wscript on a
standalone build checks for pytalloc-util in a manner that will
fail if bundling is disabled, this causes issues on
--disable-python builds of ldb, tevent, and samba.
This patch restructures the logic to skip checks if python
is disabled, instead just setting the temporary state variable
'using_system_pytalloc_util' to False
Successfully tested patch on ldb-1.1.31 and above, tevent-0.9.33,
and samba-4.7_rc3
Signed-off-by: Ian Stakenvicius <axs@gentoo.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
ldb modules are not (yet) unloaded and are only loaded once (there is a check
that makes sure of this). Allocate off the NULL context. We never want this
to be freed until process shutdown. If eventually we add the ability to
unload ldb modules we can add a deregister function that walks and frees the list.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12932
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
With a proper implementation this enables modifications without
having to allocate a record. In really performance sensitive code
paths this matters.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
This will allow dbwrap_do_locked to check the order without talloc
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Convert all implementors of dbwrap_store to a storev-style call
by using the dbwrap_merge_dbufs call
For dbwrap_tdb, this matches tdb_storev.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
* Bug #12882: Do not install _ldb_text.py if we have system libldb
* Use libraries from build dir for testsuite
* Bug #12900: Fix index out of bound in ldb_msg_find_common_values
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Sat Jul 22 03:46:25 CEST 2017 on sn-devel-144
* make tevent_req_print() more robust against crashes
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
