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Due to inconsistent use of lp_kernel_oplocks() we could miss kernel
oplocks being on/off in some of our oplock handling code, and thus
use the wrong logic.
Ensure all logic around koplocks and lp_kernel_oplocks() is consistent.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13193
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Thu Jan 4 16:03:38 CET 2018 on sn-devel-144
We need to expect any amount of "stat" opens on the file without
triggering an assert.
This is the correct fix for bug #11844. I guess we haven't seens this
very often before bug #12766 got fixed, because most clients were using
LEASES instead of OPLOCKS.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12798
See also:
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11844
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12766
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Ralph Boehme <slow@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Update an optimisation in update_num_read_oplocks() that checks for
exclusive oplocks to the lease area.
The idea of the optimisation is to avoid expensive db queries in
brlock.tdb if we *know* we're the only open.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=12766
Signed-off-by: Ralph Boehme <slow@samba.org>
Signed-off-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Sat May 6 22:58:47 CEST 2017 on sn-devel-144
This is similar to 9533a55ee5 but this
time in the contend_level2_oplocks_begin_default() function.
The idea of the optimisation is to avoid expensive db queries in
locking.tdb if we *know* we're the only open.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=12766
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
otherwise smbd asks the kernel to release an oplock that was never requested
Bug: https://bugzilla.samba.org/show_bug.cgi?id=11400
Signed-off-by: Christian Ambach <ambi@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Wed Jan 6 08:58:56 CET 2016 on sn-devel-144
Pair-Programmed-With: Jeremy Allison <jra@samba.org>
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Volker Lendecke <vl@samba.org>
Signed-off-by: Jeremy Allison <jra@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Pair-Programmed-With: Jeremy Allison <jra@samba.org>
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Volker Lendecke <vl@samba.org>
Signed-off-by: Jeremy Allison <jra@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
These convert the oplock state into SMB2_LEASE_ flags.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
A client can:
- open a handle (h1)
- write some data to h1.
- open a 2nd handle h2 (downgrades both handles to level II)
- try to read the data on h2 (this gets old data)
Bug: https://bugzilla.samba.org/show_bug.cgi?id=10921
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Thu Nov 6 13:09:38 CET 2014 on sn-devel-104
The name of this function has changed, but the DEBUG statements have
not been adapted. This is the case in a lot of our code. With __func__
this problem goes away: __func__ is C99, and we also use it already.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
This avoids the question where it could happen that something else but
fsp->oplock_type might be useful as an argument here.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: David Disseldorp <ddiss@samba.org>
Now that we transmit the level we want to break to via the msg.op_type
we can unify MSG_SMB_BREAK_REQUEST and MSG_SMB_ASYNC_LEVEL2_BREAK and
thus simplify the code a bit.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
The level we have to break to depend on the breakers create_disposition:
If we overwrite, we have to break to none.
This patch overloads the "op_type" field in the break message we send
across to the smbd holding the oplock with the oplock level we want to
break to. Because it depends on the create_disposition in the breaking
open, only the breaker can make that decision. We might want to use
a different mechanism for this in the future, but for now using the
op_type field seems acceptable to me.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
With the special case for bug 5980 in do_break_to_none we only have
one caller: process_oplock_async_level2_break_message. The further
goal is to merge process_oplock_async_level2_break_message with
process_oplock_break_message.
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 Oct 15 03:42:53 CEST 2013 on sn-devel-104
With the level2 indicator in brlock.tdb this race condition does not
exist anymore
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
FAKE_LEVEL_II_OPLOCK was an indicator to break level2 oplock holders
on write. This information is now being held in brlock.tdb, which makes
the FAKE_LEVEL_II_OPLOCK type unnecessary.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This has been converted from a timed event to an immediate one in
e7dab403c0
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
This flag existed to break an exclusive or batch oplock in just one
instead of two steps down to "no oplock" when we did an allocation or file
size change. Running raw.oplock against W2k12 differs in this respect
from W2k3: W2k12 takes two steps (via level2) to break to none. This
removes the special flag that we only had for compatibility with systems
older than W2k12...
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): Fri Sep 6 00:47:07 CEST 2013 on sn-devel-104
If we get an oplock break response, we forgot to remove the oplock break
timeout.
Found by stopping raw.oplock.exclusive5 after the 2nd open and watching a debug
level 10 log. This amends 08a9de89 from 2007.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
There's no point in allocating a fixed length array that we throw away
immediately after use.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
Autobuild-User(master): Michael Adam <obnox@samba.org>
Autobuild-Date(master): Tue Aug 20 14:35:21 CEST 2013 on sn-devel-104
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
Autobuild-User(master): Michael Adam <obnox@samba.org>
Autobuild-Date(master): Fri Aug 16 18:46:36 CEST 2013 on sn-devel-104
