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This is a performance improvement for heavily contended files, in
particular in a cluster. The separate call to get_file_infos makes us
pull the locking.tdb record twice per open. For a contended file this
can be a performance penalty, this gets the # of record accesses for
the open/close cycle down from 3 to 2.
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): Sat Nov 23 00:40:49 CET 2013 on sn-devel-104
Files and directories created with FILE_NO_COMPRESSION should not
inherit the compression attribute from their parent directory.
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
https://bugzilla.samba.org/show_bug.cgi?id=10229
We need to check if the requested access mask
could be used to open the underlying file (if
it existed), as we're passing in zero for the
access mask to the base filename.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: David Disseldorp <ddiss@suse.de>
This reverts commit 7b70fa1873.
This is a change in behaviour which needs much further investigation
and testing.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: David Disseldorp <ddiss@samba.org>
Autobuild-User(master): David Disseldorp <ddiss@samba.org>
Autobuild-Date(master): Fri Oct 25 14:22:20 CEST 2013 on sn-devel-104
This reverts commit e689b7d51e.
This is a change in behaviour which needs much further investigation
and testing.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: David Disseldorp <ddiss@samba.org>
Later on we will have all the oplock/sharemode operations in one routine.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: David Disseldorp <ddiss@samba.org>
This makes the is_stat_open special case in grant_fsp_oplock_type
redundant because in open_file_ntcreate further up we have already set
oplock_request to NO_OPLOCK for stat opens.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: David Disseldorp <ddiss@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>
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>
There's no reason why we should not do this. This has turned into a pure
internal consistency check that should apply fine every time.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
While refactoring find_oplock_types to validate_oplock_types I forgot
that stat opens will end up in locking.tdb. So even with a batch oplock
around we can have more than one entry. This means the consistency check
in validate_oplock_types was wrong and too strict.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Only one call to delay_for_oplocks left. Metze showed me the new logic:
BATCH is broken if we have a sharing violation. Exclusive is broken
otherwise. That's it.
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): Wed Oct 16 02:51:53 CEST 2013 on sn-devel-104
No clue what this does. In open_directory, "dir_existed" is not used after
open_mode_check. In open_file_ntcreate it's used, but I can't think of a case
right now where we would find a formerly nonexisting file to exist suddenly.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
This makes grant_fsp_oplock_type independent from the values computed
in validate_oplock_types. It *might* make oplock calculation a bit
slower for heavily shared files, as we are walking the share mode array
twice. But we are doing so much stuff in open that I doubt the difference
is measurable. It clears up the code for me however, and I think that's
worth it.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
This removes two variables in open_file_ntcreate based on the observation
that for exclusive and batch oplocks there can only be one entry. So
in these cases we don't need to keep pointers from find_oplock_types to
delay_for_oplocks. We can just reference the only share mode entry around.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
smb_panic() does not take a printf style argument. This improves debug
output by easily printing the index that we fell over. Also, doing
smb_panic deep down is bad style IMHO.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
share_mode_data.num_share_modes is a uint32.
48 bytes less in .o text size for -O3 :-)
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
Define a variable to dereference lck->data just once. Believe it or not,
this saves a few bytes .o with -O3 :-)
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Michael Adam <obnox@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>
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Sun Oct 13 14:35:26 CEST 2013 on sn-devel-104
This came from delete_on_close handling which was factored out.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
We need to check for DELETE_PENDING before the first oplock break
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): Sat Oct 12 01:56:18 CEST 2013 on sn-devel-104
In open_file_ntcreate we do the del_share_mode on error. We should do
it here as well.
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): Wed Oct 9 01:58:55 CEST 2013 on sn-devel-104
3.6 and earlier allowed open for execution when execute permissions are
not present on a file. This has been fixed in Samba 4.0.
This patch changes smbd to skip the execute bit from the ACL check
in the open code if "acl allow execute always = yes", hence
re-establishing the old behaviour in this case.
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Reviewed-by: David Disseldorp <ddiss@samba.org>
We don't have lck allocated yet at these points. Remove the TALLOC_FREE
calls that triggered me looking for the get_share_mode_lock calls.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Michael Adam <obnox@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
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): Sat Apr 27 02:06:10 CEST 2013 on sn-devel-104
We do this if the idmap layer resolves Builtin_Administrators
as ID_TYPE_BOTH and if the current token has the
Builtin_Administrators SID or it's SYSTEM.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
If we can access the path to this file, by
default we have FILE_READ_ATTRIBUTES from the
containing directory. See the section.
"Algorithm to Check Access to an Existing File"
in MS-FSA.pdf.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
according to coding guidelines
Signed-off-by: Michael Adam <obnox@samba.org>
Signed-off-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Wed Oct 17 14:37:58 CEST 2012 on sn-devel-104
This makes it clear which context the returned SD is allocated on, as
a number of callers do not want it on talloc_tos().
As the ACL transformation allocates and then no longer needs a great
deal of memory, a talloc_stackframe() call is used to contain the
memory that is not returned further up the stack.
Andrew Bartlett
This reverts commit c251a6b044.
Remove this as we're planning to remove the security mask,
directory security mask parameters and only use create mask/directory mask.
Currently we call FSET_NT_ACL to inherit any ACLs on create. However
FSET_NT_ACL uses the security mask/directory security mask parameters
instead of the create mask/directory mask parameters.
Swap them temporarily when creating to ensure the correct masks
are applied.
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Tue Oct 2 22:27:17 CEST 2012 on sn-devel-104
With the prior code we assumed that we do not have kernel oplocks around
when we open a file because we handled samba-internal oplock breaks
before the open attempt.
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Sat Sep 29 19:29:36 CEST 2012 on sn-devel-104
This is a significant behaviour change: We do not open the file under
the share mode lock anymore. This might lead to more open calls in case
of oplock breaks or sharing violations, but those are slow error paths
and as such might be not too performance sensitive. The benefit of this
patch is a significant reduction of complexity of open_file_ntcreate()
With the new behaviour, we call fcb_or_dos_open after open_file(). It
is open_file() that sets up the fsp so that fcb_or_dos_open can find it
in the list of fsps. Avoid finding the fsp we are just setting up.
This is a 1:1 copy&paste of the oplock/sharemode code that we do before
an existing file is opened. It is a prerequiste for a patch that removes
all of that handling before we open the file.
The "else" is not necessary. In the if-branch we just returned.
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Wed Sep 26 18:08:03 CEST 2012 on sn-devel-104
The "access_bits" clause is redundant. is_stat_open says that exactly
at least one of the stat_open_bits must be set and none else.
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Tue Sep 25 20:05:06 CEST 2012 on sn-devel-104
To me this makes open_file_ntcreate a little easier to understand
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Tue Sep 25 10:08:15 CEST 2012 on sn-devel-104
Replaces blanket root allow if set. Set to 'false' for
all current callers.
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Sat Sep 15 00:37:49 CEST 2012 on sn-devel-104
The only difference between batch and exclusive oplocks is the time of
the check: Batch is checked before the share mode check, exclusive after.
Signed-off-by: Jeremy Allison <jra@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Sat Sep 8 13:05:05 CEST 2012 on sn-devel-104
Replace an if-statement by a direct assignment
Signed-off-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Wed Sep 5 01:56:46 CEST 2012 on sn-devel-104
Fix indentation a bit
Signed-off-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Sat Sep 1 07:07:12 CEST 2012 on sn-devel-104
They use talloc_tos() internally: hoist that up to the callers, some
of whom don't want to us talloc_tos().
A simple patch, but hits a lot of files.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
On open without create, the file did exist, but some
other (local or NFS) process either renamed/unlinked
and re-created the file with different dev/ino after
we walked the path, but before we did the open. We
could retry the open but it's a rare enough case it's
easier to just fail the open to prevent creating any
problems in the open file db having the wrong dev/ino
key.
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Tue Jul 10 21:57:33 CEST 2012 on sn-devel-104
Move the inheritance work into the if block
where we created the file. We can never have
created the file (and thus need no inheritance)
for a stat-open.
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Tue Jul 10 03:30:22 CEST 2012 on sn-devel-104
Move the fstat call into the block which opens a file descriptor.
Remove the stat() call in the stat-open case. We already failed
the open if !file_existed.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Mon Jun 25 17:13:59 CEST 2012 on sn-devel-104
or should we leave the NetBSD and FreeBSD platforms just broken? Actually these
two *want* to have broken platforms as they use different errno's than POSIX
demands *interntionally*. The POSIX errno ELOOP for O_NOFOLLOW open calls on
symlinks is clear and unambiguous. See http://gnats.netbsd.org/43154 for the
interesting NetBSD discussion on that.
Autobuild-User(master): Björn Jacke <bj@sernet.de>
Autobuild-Date(master): Sun Jun 10 16:10:02 CEST 2012 on sn-devel-104
Pair-Programmed-With: Volker Lendecke <vl@samba.org>
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Michael Adam <obnox@samba.org>
Autobuild-Date(master): Fri Jun 8 23:20:20 CEST 2012 on sn-devel-104
We can't manipulate file_attributes if it's a posix call. I'll look
at adding a test for this asap.
Autobuild-User: Jeremy Allison <jra@samba.org>
Autobuild-Date: Tue Jun 5 04:26:11 CEST 2012 on sn-devel-104
get_share_mode_lock_fresh is just a confusing name
Autobuild-User: Volker Lendecke <vl@samba.org>
Autobuild-Date: Sun Feb 19 19:16:41 CET 2012 on sn-devel-104
The second if-statement could never have kicked in, assuming the
SMB_ASSERT above was right.
Jeremy, please check!
Autobuild-User: Volker Lendecke <vlendec@samba.org>
Autobuild-Date: Tue Jan 31 20:15:36 CET 2012 on sn-devel-104
This slightly simplifies the code path for all callers which assume
that a share mode exists already. Only the callers in open_file_ntcreate
and open_directory will ever create new share modes.
Signed-off-by: Jeremy Allison <jra@samba.org>
even if we don't have access to read the ACL on the object. Fixes bug #8673 - NT ACL issue.
Different fix needed for 3.6.x.
Autobuild-User: Jeremy Allison <jra@samba.org>
Autobuild-Date: Tue Dec 20 22:13:51 CET 2011 on sn-devel-104
smbd_check_access_rights() - we can always delete a symlink.
Autobuild-User: Jeremy Allison <jra@samba.org>
Autobuild-Date: Fri Dec 16 03:32:15 CET 2011 on sn-devel-104
Don't manipulate the new_dos_attributes bits until we know it's not a POSIX open.
Autobuild-User: Jeremy Allison <jra@samba.org>
Autobuild-Date: Wed Oct 5 01:19:17 CEST 2011 on sn-devel-104
