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Commit Graph

627 Commits

Author SHA1 Message Date
Volker Lendecke
48926b7619 s3:locking: Introduce share_mode_forall
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
2014-10-31 03:47:40 +01:00
Volker Lendecke
0d4f7bfdb9 s3:locking: Rename share_mode_forall->share_entry_forall
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
2014-10-31 03:47:40 +01:00
Volker Lendecke
85935097b9 brlock: Remove validate_lock_entries
This is now only called during brl_forall. It does not really hurt if we list
dead processes here. If the upper layers really care, they can filter it out
themselves. The real lock conflicts are not removed on-demand.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2014-08-23 00:24:18 +02:00
Volker Lendecke
1057240733 brlock: Do auto-cleanup at conflict time
This avoids the need to do sweeping validate_lock_entries calls

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2014-08-23 00:24:18 +02:00
Volker Lendecke
40386ee78d locking: posix_lock_list does not use "fsp"
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 Aug  6 03:27:36 CEST 2014 on sn-devel-104
2014-08-06 03:27:36 +02:00
Volker Lendecke
380c282d44 locking: Avoid a pointless cast
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2014-08-06 01:05:14 +02:00
Volker Lendecke
188017ea32 smbd: Simplify brl_locktest
Pass "struct lock_struct" as a parameter. This had to be destructured
before the call and re-constructed inside brl_locktest.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
2014-07-22 15:32:39 +02:00
Volker Lendecke
50b74ccb6a smbd: Restructure brl_conflict_other
It took me really long to grasp what's going on in this routine. I hope
its logic is easier to understand now

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
2014-07-22 15:32:39 +02:00
Volker Lendecke
a48c0a42ce smbd: Fix indentation, {} and line length in brl_conflict_other
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
2014-07-22 15:32:39 +02:00
Volker Lendecke
2d8576ea7c smbd: Rename lck2->rw_probe in brl_conflict_other
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
2014-07-22 15:32:39 +02:00
Volker Lendecke
e75e4b2ed8 smbd: Rename lck1->lock in brl_conflict_other
lck1 and lck2 are treated differently. They should carry more descriptive
names.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
2014-07-22 15:32:39 +02:00
Volker Lendecke
432130c572 smbd: Use a struct initializer brl_lock
Avoids a #ifdef DEVELOPER and saves a few bytes .text

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
2014-07-22 15:32:39 +02:00
Volker Lendecke
164e0cb23c smbd: Simplify strict_lock_default with early returns
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
2014-07-22 15:32:39 +02:00
Volker Lendecke
ff9a0a8993 smbd: Use %ju/uintmax_t in source3/locking
Avoid going through (double) and %.0f

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
2014-07-22 15:32:39 +02:00
Volker Lendecke
085c7a71fd smbd: do_lock_cancel does not need "blr" anymore
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 Jul  4 08:52:31 CEST 2014 on sn-devel-104
2014-07-04 08:52:31 +02:00
Volker Lendecke
5a1fb2eb0d smbd: brl_lock_cancel does not need "blr" anymore
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2014-07-04 06:31:16 +02:00
Volker Lendecke
6f8fd3d5ab smbd: Remove unused blocking_lock_record* from VFS_BRL_CANCEL_WINDOWS
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2014-07-04 06:31:16 +02:00
Volker Lendecke
f038cf739d smbd: do_lock does not need "blr" anymore
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2014-07-04 06:31:16 +02:00
Volker Lendecke
c886e66232 smbd: brl_lock does not need "blr" anymore
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2014-07-04 06:31:16 +02:00
Volker Lendecke
b08fe2d98d smbd: Remove unused blocking_lock_record* from VFS_BRL_LOCK_WINDOWS
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2014-07-04 06:31:16 +02:00
Volker Lendecke
28df2b0d0d smbd: Use brl_delete_lock_struct in brl_lock_cancel_default
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2014-07-04 06:31:16 +02:00
Jeremy Allison
47748606dc s3: smbd: Locking, fix off-by one calculation in brl_pending_overlap().
Consider:

lock = start=110,size=10
pend_lock = 100, size=10

Do not overlap. However,

(lock->start <= pend_lock->start + pend_lock->size)
     110             100                10

is true, so it returns true (overlap).

lock->start <= pend_lock->start + pend_lock->size

should be:

lock->start < pend_lock->start + pend_lock->size

BUG: https://bugzilla.samba.org/show_bug.cgi?id=10685

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>

Autobuild-User(master): Michael Adam <obnox@samba.org>
Autobuild-Date(master): Wed Jul  2 10:18:17 CEST 2014 on sn-devel-104
2014-07-02 10:18:17 +02:00
Volker Lendecke
8ae692cc91 smbd: validate_lock_entries does not need mem_ctx anymore
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2014-06-30 22:28:15 +02:00
Volker Lendecke
c5fb0f9cc0 smbd: Simplify validate_lock_entries
Signed-off-by: Volker Lendecke <vl@samba.org>
2014-06-30 22:28:15 +02:00
Volker Lendecke
2282128ed0 smbd: Factor out brl_delete_lock_struct
memmove calculations are never nice, and this is going to be used in
validate_lock_entries soon :-)

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2014-06-30 22:28:15 +02:00
Volker Lendecke
3c2f4e328b smbd: Simplify validate_lock_entries
... saves >100 bytes object code :-)

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2014-06-30 22:28:15 +02:00
Volker Lendecke
9f2e90754b smbstatus: Fix an uninitialized variable
We only print valid share mode entries, stale ones don't count. In
traverse, let the callback decide about staleness.

https://bugzilla.samba.org/show_bug.cgi?id=10680

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2014-06-30 22:28:15 +02:00
Ralph Boehme
3defbe2734 locking: use correct conversion specifier for printing variables
Fix several occurences of using printf conversion to fload when
printing offset and count variables in locking debug messages and
smbstatus.

Conversion to float may lead to wrong results with very large values.

Signed-off-by: Ralph Boehme <rb@sernet.de>
Reviewed-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
2014-06-13 13:22:18 +02:00
Jeremy Allison
bed323cebc s3 : smbd : Protect all possible code paths from fsp->op == NULL.
In changes to come this will be possible for an INTERNAL_OPEN_ONLY.
The protection was already in place for some code paths, this
makes the coverage compete.

Bug 10564 - Lock order violation and file lost

https://bugzilla.samba.org/show_bug.cgi?id=10564

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
2014-05-02 21:27:07 +02:00
Volker Lendecke
9e754840de smbd: Remove unused "share_mode_data->id"
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 Mar 21 21:22:24 CET 2014 on sn-devel-104
2014-03-21 21:22:24 +01:00
Volker Lendecke
698f7f21c2 smbd: Keep "the_lock"s file id separately
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2014-03-21 19:20:17 +01:00
Volker Lendecke
ede6f44821 smbd: Avoid checking the_lock->id for fresh locks
If we just fetched the lock, this check will always be true.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2014-03-21 19:20:17 +01:00
Volker Lendecke
c416b34648 smbd: Explicitly pass "file_id" to rename_share_filename
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2014-03-21 19:20:17 +01:00
Volker Lendecke
bbd0bda9c2 smbd: Fix an uninitialized memory read
This might be the reason for a few flaky builds.

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): Mon Mar  3 16:30:53 CET 2014 on sn-devel-104
2014-03-03 16:30:53 +01:00
Jeremy Allison
abf08ed544 s3: smbd: Ensure brl_get_locks_readonly() always returns a valid struct byte_range_lock even if there are no locks.
brl_get_locks_readonly() currently returns NULL when it can't
find any byte range locks on the file. This is an error - it
should return a valid struct byte_range_lock containing num_locks == 0
so it can be cached.

Returning NULL when there are no locks causes POSIX lock
tests to fail returning NT_STATUS_NO_MEMORY (as it thinks
it can't allocate the struct) instead of NT_STATUS_OK.

Fixes bug:

Bug 10431 - STATUS_NO_MEMORY response from Query File Posix Lock request

https://bugzilla.samba.org/show_bug.cgi?id=10431

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Volker Lendecke <Volker.Lendecke@SerNet.DE>
2014-02-27 10:42:36 -08:00
Michael Adam
cf0cb0add9 dbwrap: add a dbwrap_flags argument to db_open()
This is in preparation to support handing flags to backends,
in particular activating read only record support for ctdb
databases. For a start, this does nothing but adding the
parameter, and all databases use DBWRAP_FLAG_NONE.

Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
2014-02-07 16:06:06 +01:00
Garming Sam
413e0b6872 param: Complete the removal of the "open files database hash size" parameter
This parameter was originally set for removal in 2007 in 28210588ed

Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
2014-01-31 08:05:47 +01:00
Michael Adam
f42d380ead s3:brlock: fix a comment typo
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>

Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Thu Jan 30 13:25:22 CET 2014 on sn-devel-104
2014-01-30 13:25:22 +01:00
Volker Lendecke
2a77e613cb smbd: Early exit
Yes, this also showed up in profiles

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
2013-12-14 11:21:41 +01:00
Volker Lendecke
7ae77a5d26 smbd: Simplify get_share_mode_lock a bit
This does two things: It gets rid of a talloc_stackframe in a hot
code path and to me it makes the code easier to understand. It makes
the talloc hierarchy more obvious to follow.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
2013-12-14 10:08:56 +01:00
Volker Lendecke
80e6ca5625 smbd: Factor out get_share_mode_write_time of get_file_infos
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2013-11-22 13:30:27 -08:00
Volker Lendecke
c85deeed32 smbd: Fix CID 1035434 Same on both sides
Looks scary, but the only effect of this bug is too many UNLOCK messages

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ira Cooper <ira@samba.org>
2013-11-11 21:04:09 +01:00
Volker Lendecke
c938a1065f smbd: Factor out remove_stale_share_mode_entries
Will be used in the next commit

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
2013-10-15 23:46:11 +02:00
Volker Lendecke
47f65d5829 smbd: Add debugs to brlock.c
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2013-10-15 01:52:29 +02:00
Volker Lendecke
fcafaf6022 smbd: Remove FAKE_LEVEL_II_OPLOCK
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>
2013-10-15 01:52:29 +02:00
Volker Lendecke
eb50c18c4a smbd: Put "have_read_oplocks" into brlock.tdb
This implements an idea by metze: Right now Samba does not grant level2
oplocks where it should: After an initial no-oplock open that has been
written to, we don't have the FAKE_LEVEL2_OPLOCK entry in locking.tdb
around anymore, this downgraded to NO_OPLOCK. Windows in this case will
grant level2 if being asked, we don't.  Part of the reason for this
is that we don't have a proper mechanism to communicate the fact that
level2 needs to be broken to other smbds. Metze's insight was that we
have to look into brlock.tdb for every write anyway, so this might be
the right place to store this information.

My first reaction was that this is really hackish, but on further thought
this is not. oplocks depend on brlocks anyway, and we have the proper
mechanisms in place for brlocks.

The format for this change is to add one byte to the end of the brlock.tdb
record with value 1 if we have level2 oplocks around. Thus this patch
effectively reverts 8f41142 which I discovered while writing this
change. We now legally have unaligned records.

We can certainly talk about the format, but I'm not yet convinced we
need an idl for this yet. This is a potentially very hot code path,
and ndr marshalling has a cost.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2013-10-15 01:52:29 +02:00
Volker Lendecke
0cc212385c smbd: Simplify set_share_mode
With the find_share_mode simplification we don't need fill_share_mode anymore.
So this coalesces add_share_mode as well.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2013-10-08 14:42:40 -07:00
Volker Lendecke
b8b7e855ce smbd: Simplify find_share_mode_entry callers
All callers used fill_share_mode_entry before calling
find_share_mode_entry. Remove that requirement.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2013-10-08 14:42:29 -07:00
Volker Lendecke
e0e5f67da5 smbd: Convert set_share_mode to return bool for success
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2013-10-08 14:42:25 -07:00
Volker Lendecke
ad2ba58f53 smbd: Make add_share_mode return bool
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2013-10-08 14:42:17 -07:00