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call_nt_transact_notify_change() is now sync if there are changes around.
A notify_message does a direct reply from within the message, so
process_pending_change_notify_queue is not needed anymore for samba-generated
events. Next step is to restructure the kernel-mechanisms to generate
messages.
Volker
Checking in because Jeremy was bugging me. Potentially this becomes quite
intrusive, I'm not sure if I should open a temporary branch for this.
Jeremy, Jerry, do you think 3_0 is the right place for this?
Volker
error messages: We relied upon a stat that a directory did not exist to later
on then do the mkdir or not. This does the mkdir directly and copes with a
potential error.
The second one is more important: It's possible with Samba 3 to do a
ntcreate&x with NTCREATEX_OPTIONS_DIRECTORY and we happily do a NT_STATUS_OK.
Also move up the use_nt_status() logic a bit. I think this does not belong
into the core routines, the smb server as such should take care of it.
Jeremy, do you think this should go to 3.0.24?
I'll update samba4torture when the build farm has picked up this checkin.
Volker
fix the messaging code to call the efficient calls :
save_re_uid()
set_effective_uid(0);
messaging_op
restore_re_uid();
instead of using heavyweight become_root()/unbecome_root()
pairs around all messaging code. Fixup the messaging
code to ensure sec_init() is called (only once) so that non-root
processes still work when sending messages.
This is a lighter weight solution to become_root()/unbecome_root()
(which swaps all the supplemental groups) and should be more
efficient. I will migrate all server code over to using this
(a similar technique should be used in the passdb backend
where needed).
Jeremy.
to copy over the copy of the access_mask, open_access_mask.
Jerry - this is a definate fix for a 3.0.23b and should also
be on the patches page. CIFSFS breaks without this.
Jeremy.
that create dispositions that cause O_TRUNC break
oplocks. This simplifies the code - although we have
to keep separate the client requested access mask and
the access mask we actually use to open the file.
Jeremy.
oplocks that were granted when we had released the lock. Fix
strange case where stat open grants a batch oplock on file
create, but grants no oplock on file open.
Jeremy.
no way to get all the cases where kernel oplocks are
on and we can't open the file and get the correct
semantics (think about the open with truncate with
an attribute only open - we'd need a vfs change to
add the truncate(fname, len) call). So always drop
the share mode lock before doing any real fd opens and
then re-acquire it afterwards. We're already dealing
with the race in the create case, and we deal with
any other races in the same way. Volker, please
examine *carefully* :-). This should fix the problems
people reported with kernel oplocks being on.
Jeremy.
This allows a requestor to set FORCE_OPLOCK_BREAK_TO_NONE
to ensure we don't break to level 2. Fixed a couple
of resource leaks in error paths in open_file_ntcreatex.
Jeremy.
mid replies on path based set-eof trans2 calls.
Needs modification for HEAD (as in head open_file_ntcreateX
properly returns NTSTATUS - I'll fix this tomorrow my
time). Secondly it still fails the Samba4 RAW-OPLOCK
smbtorture because of an interesting case. Our oplock
code always returns "break to level 2" if it can.
In this case (path-based set-eof or set-allocation size
on an exclusive oplocked file) W2K3 always sends a
break-to-none. We send the break to none (from level2)
after we've done the write for eof or allocation size.
I need to work out some way of telling our break code
to always break to none (might need to extend the message
field).
Jeremy.
This could be the cause of the perf. problem reported
between 3.0.14a and 3.0.2x. Lufthansa has *wireless*
on their flights to the USA now... (I'm in heaven ! :-).
Jeremy.
is produced when a process exits abnormally.
First, we coalesce the core dumping code so that we greatly improve our
odds of being able to produce a core file, even in the case of a memory
fault. I've removed duplicates of dump_core() and split it in two to
reduce the amount of work needed to actually do the dump.
Second, we refactor the exit_server code path to always log an explanation
and a stack trace. My goal is to always produce enough log information
for us to be able to explain any server exit, though there is a risk
that this could produce too much log information on a flaky network.
Finally, smbcontrol has gained a smbd fault injection operation to test
the changes above. This is only enabled for developer builds.
because lck->num_share_modes != 0 doesn't mean that
there *are* other valid share modes. They may be
all marked "UNUSED" or be deferred open entries.
In that case don't downgrade the granted oplock to
level2 needlessly - a client can have an exclusive
oplock in this case. The original code handled this
correctly in the lck->num_share_modes == 0 case but
not in the case where there were no valid share modes
but lck->num_share_modes != 0. I'll clean up my
Samba4 torture tester for this and commit it tomorrow.
Jeremy.
The sad thing is the core of this bug fix is just
removing a paranoia "exit_server" call, as the
rest of the logic was already correct :-).
Lots of comments to explain the logic added.
I will look at adding tests to exercise this,
might be possible.
Jeremy.
