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path: root/source3/locking/brlock.c
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2012-01-18s3: Add a "lock_order" argument to db_openVolker Lendecke1-1/+2
This will be used to enforce a lock hierarchy between the databases. We have seen deadlocks between locking.tdb, brlock.tdb, serverid.tdb and notify*.tdb. These should be fixed by refusing a dbwrap_fetch_locked that does not follow a defined lock hierarchy.
2011-12-16s3:locking: avoid using sconn_server_id()Stefan Metzmacher1-1/+1
metze
2011-12-14s3:smbd: remove brl_register_msgs()Stefan Metzmacher1-11/+5
metze
2011-12-12vfs: Make function pointer names consistent. They all end in _fnRichard Sharpe1-4/+5
Autobuild-User: Richard Sharpe <sharpe@samba.org> Autobuild-Date: Mon Dec 12 04:58:40 CET 2011 on sn-devel-104
2011-10-11s3:locking: convert brlock to only use dbwrap wrapper functionsMichael Adam1-15/+28
Avoid direct use of the db_record and db_context structs.
2011-07-29s3:dbwrap: move all .c and .h files of dbwrap to lib/dbwrap/Michael Adam1-1/+1
Autobuild-User: Michael Adam <obnox@samba.org> Autobuild-Date: Fri Jul 29 13:34:22 CEST 2011 on sn-devel-104
2011-07-29s3:dbwrap: move db_open() to a file dbwrap_open.c of its own.Michael Adam1-0/+1
Also start new folder lib/dbwrap/ where dbwrap_open.c is stored and make the fallbacke implementation functoins non-static and create a dbwrap_private.h header file that contains their prototypes.
2011-07-16Fix bug #8307 - brl_close_fnum does not call SMB_VFS_BRL_UNLOCK_WINDOWS on ↵Jeremy Allison1-122/+23
all locks Reported by herb@samba.org. Remove the (premature) optimization on file close. Autobuild-User: Jeremy Allison <jra@samba.org> Autobuild-Date: Sat Jul 16 02:32:02 CEST 2011 on sn-devel-104
2011-06-20tdb_compat: Higher level API fixes.Rusty Russell1-1/+1
My previous patches fixed up all direct TDB callers, but there are a few utility functions and the db_context functions which are still using the old -1 / 0 return codes. It's clearer to fix up all the callers of these too, so everywhere is consistent: non-zero means an error. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2011-06-09lib/util Bring procid_str() into lib/util as server_id_string()Andrew Bartlett1-1/+1
This is needed for OpenChange, which prints Samba struct server_id values in debug messages. Andrew Bartlett
2011-06-09s3-talloc Change TALLOC_MEMDUP() to talloc_memdup()Andrew Bartlett1-1/+1
Using the standard macro makes it easier to move code into common, as TALLOC_MEMDUP isn't standard talloc.
2011-06-09s3-talloc Change TALLOC_ZERO_P() to talloc_zero()Andrew Bartlett1-1/+1
Using the standard macro makes it easier to move code into common, as TALLOC_ZERO_P isn't standard talloc.
2011-06-09s3-talloc Change TALLOC_P() to talloc()Andrew Bartlett1-1/+1
Using the standard macro makes it easier to move code into common, as TALLOC_P isn't standard talloc.
2011-05-28s3: Fix some nonempty blank linesVolker Lendecke1-6/+6
2011-05-05More simple const fixes.Jeremy Allison1-2/+2
2011-03-30s3-messages: make ndr_messaging.h part of messages.h.Günther Deschner1-1/+0
Guenther
2011-03-30s3-messages: only include messages.h where needed.Günther Deschner1-0/+1
Guenther
2011-03-30s3-locking: move locking prototypes out of proto.h.Günther Deschner1-0/+1
Will later become part of locking.h Guenther
2011-03-30s3-includes: only include system/filesys.h when needed.Günther Deschner1-0/+1
Guenther
2011-03-18s3:locking: simplify the non cluster case of brl_get_locks_readonly()Stefan Metzmacher1-21/+2
Pair-Programmed-With: Michael Adam <obnox@samba.org> metze Autobuild-User: Stefan Metzmacher <metze@samba.org> Autobuild-Date: Fri Mar 18 13:00:51 CET 2011 on sn-devel-104
2011-03-18s3:locking: brl_get_locks_internal() should not expose a write lock if the ↵Stefan Metzmacher1-7/+24
caller wants read_only This triggered deadlocks in the cluster case of brl_get_locks_readonly(). Pair-Programmed-With: Michael Adam <obnox@samba.org> metze
2011-03-02s3-server_id: only include server_id where needed.Günther Deschner1-0/+1
Guenther
2010-09-27Change to using TDB_INCOMPATIBLE_HASH (the jenkins hash) on allJeremy Allison1-1/+1
TDB_CLEAR_IF_FIRST tdb's. For tdb's like gencache where we open without CLEAR_IF_FIRST and then with CLEAR_IF_FIRST if corrupt this is still safe to use as if opening an existing tdb the new hash will be ignored - it's only used on creating a new tdb not opening an old one. Jeremy.
2010-08-26s3-build: use dbwrap.h only where needed.Günther Deschner1-0/+1
Guenther
2010-07-05s3: Remove procid_self() from brl_close_fnum()Volker Lendecke1-1/+2
2010-05-07This patch looks bigger than it is. It does 2 things. 1). Renames smbpid -> ↵Jeremy Allison1-26/+26
smblctx in our locking code. 2). Widens smblctx to 64-bits internally. Preparing to use the SMB2 handle as the locking context. Jeremy.
2010-05-06Fix SMB2 lock tests up to cancel-by-close.Jeremy Allison1-0/+4
Jeremy.
2010-05-05Move to MS-FSA algorithm when checking for invalid lock range.Jeremy Allison1-7/+6
Satisfies SMB and SMB2. Jeremy.
2010-05-06s3: only include gen_ndr headers where needed.Günther Deschner1-0/+1
This shrinks include/includes.h.gch by the size of 7 MB and reduces build time as follows: ccache build w/o patch real 4m21.529s ccache build with patch real 3m6.402s pch build w/o patch real 4m26.318s pch build with patch real 3m6.932s Guenther
2010-03-10s3: Fix a long-standing problem with recycled PIDsVolker Lendecke1-1/+1
When a samba server process dies hard, it has no chance to clean up its entries in locking.tdb, brlock.tdb, connections.tdb and sessionid.tdb. For locking.tdb and brlock.tdb Samba is robust by checking every time we read an entry from the database if the corresponding process still exists. If it does not exist anymore, the entry is deleted. This is not 100% failsafe though: On systems with a limited PID space there is a non-zero chance that between the smbd's death and the fresh access, the PID is recycled by another long-running process. This renders all files that had been locked by the killed smbd potentially unusable until the new process also dies. This patch is supposed to fix the problem the following way: Every process ID in every database is augmented by a random 64-bit number that is stored in a serverid.tdb. Whenever we need to check if a process still exists we know its PID and the 64-bit number. We look up the PID in serverid.tdb and compare the 64-bit number. If it's the same, the process still is a valid smbd holding the lock. If it is different, a new smbd has taken over. I believe this is safe against an smbd that has died hard and the PID has been taken over by a non-samba process. This process would not have registered itself with a fresh 64-bit number in serverid.tdb, so the old one still exists in serverid.tdb. We protect against this case by the parent smbd taking care of deregistering PIDs from serverid.tdb and the fact that serverid.tdb is CLEAR_IF_FIRST. CLEAR_IF_FIRST does not work in a cluster, so the automatic cleanup does not work when all smbds are restarted. For this, "net serverid wipe" has to be run before smbd starts up. As a convenience, "net serverid wipedbs" also cleans up sessionid.tdb and connections.tdb. While there, this also cleans up overloading connections.tdb with all the process entries just for messaging_send_all(). Volker
2010-02-14s3-locking: convert brlock to TYPESAFE_QSORT()Andrew Tridgell1-3/+2
2009-12-04Make Samba3 pass the RAW-LOCK test as Windows.Jeremy Allison1-0/+5
Implement the win7 NT_STATUS_INVALID_LOCK_RANGE. Make smbd behave as Windows does in canceling locks. Jeremy.
2009-11-21s3: Remove a pointless memsetVolker Lendecke1-1/+0
We are assigning the complete structure now (we used to assign individual fields), so this is obsolete.
2009-11-21s3: Cache brlock.tdb entries for the fast read&write strict locking code pathVolker Lendecke1-5/+57
For a netbench run this gains around 2% user-space CPU, fetching a 100MB file takes around 4% less.
2009-11-03s3: Remove debug_ctx()Volker Lendecke1-1/+1
smbd just crashed on me: In a debug message I called a routine preparing a string that itself used debug_ctx. The outer routine also used it after the inner routine had returned. It was still referencing the talloc context that the outer debug_ctx() had given us, which the inner DEBUG had already freed.
2009-10-05Fix bug 6776 - Running overlapping Byte Lock test will core dump Samba daemon.Jeremy Allison1-148/+219
Re-write core of POSIX locking logic. Jeremy.
2009-07-24Make the smbd VFS typesafeVolker Lendecke1-0/+30
2009-07-20s3: Change fsp->fsp_name to be an smb_filename struct!Tim Prouty1-2/+2
2009-04-03Use procid_str in debug messages for better cluster-debuggabilityVolker Lendecke1-2/+2
2009-02-20s3 BRL: Add more clarifying comments and add implied logic to make ↵Zack Kirsch1-2/+6
conditional more clear
2009-02-13Add VFS ops for Windows BRL: Lock, Unlock and Cancel:Zack Kirsch1-19/+47
This patch adds 3 new VFS OPs for Windows byte range locking: BRL_LOCK_WINDOWS, BRL_UNLOCK_WINDOWS and BRL_CANCEL_WINDOWS. Specifically: * I renamed brl_lock_windows, brl_unlock_windows and brl_lock_cancel to *_default as the default implementations of the VFS ops. * The blocking_lock_record (BLR) is now passed into the brl_lock_windows and brl_cancel_windows paths. The Onefs implementation uses it - future implementations may find it useful too. * Created brl_lock_cancel to do what brl_lock/brl_unlock do: set up a lock_struct and call either the Posix or Windows lock function. These happen to be the same for the default implementation. * Added helper functions: increment_current_lock_count() and decrement_current_lock_count(). * Minor spelling correction in brl_timeout_fn: brl -> blr. * Changed blocking_lock_cancel() to return the BLR that it has cancelled. This allows us to assert its the lock that we wanted to cancel. If this assert ever fires, this path will need to take in the BLR to cancel, rather than choosing on its own. * Adds a small helper function: find_blocking_lock_record_by_id(). Used by the OneFS implementation, but could be useful for others.
2009-02-10Fix an uninitialized variable. Tim, please check!Volker Lendecke1-1/+1
2009-02-09s3 oplocks: Make the level2 oplock contention API more granularTim Prouty1-11/+74
This replaces release_level2_oplocks_on_change with contend_level2_oplock_begin/end in order to contend level2 oplocks throughout an operation rather than just at the begining. This is necessary for some kernel oplock implementations, and also lays the groundwork for better correctness in Samba's standard level2 oplock handling. The next step for non-kernel oplocks is to add additional state to the share mode lock struct that prevents any new opens from granting oplocks while a contending operation is in progress. All operations that contend level 2 oplocks are now correctly spanned except for aio and synchronous writes. The two write paths both have non-trivial error paths that need extra care to get right. RAW-OPLOCK and the rest of 'make test' are still passing with this change.
2008-04-11Quieten valgrind message on make valgrindtest. This doesn'tJeremy Allison1-0/+5
seem to be valid (vl - feel free to confirm). Jeremy. (This used to be commit 43b0254d93540eeaddaa32d76dd9271f4dc2ebff)
2008-03-17Merge leftovers of 0e1a86bc845 in 3-0-ctdbVolker Lendecke1-1/+1
(This used to be commit 64b1625f8e3bca43504871747bef6631e1b18f44)
2008-01-20Fix some "set but never used" warningsVolker Lendecke1-5/+0
(This used to be commit 4a6dadc5178f4861e9c032321939db3b639734b5)
2008-01-16Merge CTDB-related fixes from samba-ctdb 3.0 branch ↵Alexander Bokovoy1-14/+15
(http://samba.org/~tridge/3_0-ctdb) Signed-off-by: Alexander Bokovoy <ab@samba.org>(This used to be commit 0c8e23afbbb2d081fc23908bafcad04650bfacea)
2007-12-10Tiny simplificationsVolker Lendecke1-5/+2
locking.c:open_read_only was unused don't export the silly boolean flag locking_init(bool read_only) (This used to be commit 2f3c865707010bc7c463a02782dbee3dc2479da1)
2007-10-18RIP BOOL. Convert BOOL -> bool. I found a few interestingJeremy Allison1-28/+28
bugs in various places whilst doing this (places that assumed BOOL == int). I also need to fix the Samba4 pidl generation (next checkin). Jeremy. (This used to be commit f35a266b3cbb3e5fa6a86be60f34fe340a3ca71f)
2007-10-10r25055: Add file_id_string_tosVolker Lendecke1-1/+1
This removes file_id_string_static and file_id_string_static2 (This used to be commit 638c848c9afe374feb30e34c494f89b2a6c64f7b)
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