The OCFS2 DLM uses strlen() to determine lock name length, which excludes
the possibility of putting binary values in the name string. Fix this by
requiring that string length be passed in as a parameter.
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

dlm_lockres_master_requery() became global without any external usage.
Signed-off-by: NAdrian Bunk <bunk@stusta.de>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

locking init cleanups:

 - convert " = SPIN_LOCK_UNLOCKED" to spin_lock_init() or DEFINE_SPINLOCK()
 - convert rwlocks in a similar manner

this patch was generated automatically.

Motivation:

 - cleanliness
 - lockdep needs control of lock initialization, which the open-coded
   variants do not give
 - it's also useful for -rt and for lock debugging in general
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NArjan van de Ven <arjan@linux.intel.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

This patch #if 0's the no longer used dlm_dump_lock_resources().

Since this makes dlmdebug.h empty, this patch also removes this header.

Additionally, the needlessly global dlm_is_node_recovered() is made
static.
Signed-off-by: NAdrian Bunk <bunk@stusta.de>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

The work that is done can block for long periods of time and so is not
appropriate for keventd.
Signed-off-by: NKurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

Signed-off-by: NKurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

Signed-off-by: NKurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

Signed-off-by: NKurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

Signed-off-by: NKurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

Signed-off-by: NKurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

Signed-off-by: NKurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

We cannot restart recovery. Once we begin to recover a node, keep the state
of the recovery intact and follow through, regardless of any other node
deaths that may occur.
Signed-off-by: NKurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

If the previous master of the recovery lock dies, let calc_usage take it
down completely and let the caller completely redo the dlmlock() call.
Otherwise, there will never be an opportunity to re-master the lockres and
recovery wont be able to progress.
Signed-off-by: NKurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

Signed-off-by: NKurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

Signed-off-by: NKurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

Makes it easier for the recovery process to deal with node death.
Signed-off-by: NKurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

Take a reference on lockres structures while they are on the recovery list.
Signed-off-by: NKurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

Signed-off-by: NKurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

Signed-off-by: NKurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

Signed-off-by: NKurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

Signed-off-by: NKurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

The check for an empty lvb should check the entire buffer not just the first
byte.
Signed-off-by: NKurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

Signed-off-by: NKurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

This allows us to have a hash table greater than a single page which greatly
improves dlm performance on some tests.
Signed-off-by: NDaniel Phillips <phillips@google.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

Fixes a performance bug - pointed out by Andrew.
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

This patch converts the combination of list_del(A) and list_add(A, B) to
list_move(A, B) under fs/.

Cc: Ian Kent <raven@themaw.net>
Acked-by: NJoel Becker <joel.becker@oracle.com>
Cc: Neil Brown <neilb@cse.unsw.edu.au>
Cc: Hans Reiser <reiserfs-dev@namesys.com>
Cc: Urban Widmark <urban@teststation.com>
Acked-by: NDavid Howells <dhowells@redhat.com>
Acked-by: NMark Fasheh <mark.fasheh@oracle.com>
Signed-off-by: NAkinobu Mita <mita@miraclelinux.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Signed-off-by: NKurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

when starting lock mastery (excepting the recovery lock) wait on any nodes
needing recovery. fix one instance where lock resources were left attached
to the recovery list after recovery completed.  ensure that the node_down
code is run uniformly regardless of which node found the dead node first.
Signed-off-by: NKurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

Switch from list_head to hlist_head. Make the size of the hash dependent
upon the allocated area, rather than a constant.
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

* add dlm_wait_for_node_death function to be used after receiving a network
  error.  this will wait for the given timeout to allow the heartbeat
  callbacks to update the domain map.  without this, some paths may spin
  and consume enough cpu that the heartbeat gets starved and never updates.
Signed-off-by: NKurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

* after successfully taking the $RECOVERY lock in EX mode, recheck to make
  sure that recovery has not already begun or completed on another node
Signed-off-by: NKurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

fs/ocfs2/dlm/dlmrecovery.c does now use msleep(), and does therefore
need to #include <linux/delay.h> for getting the prototype of this
function.
Signed-off-by: NAdrian Bunk <bunk@stusta.de>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

* fix a hang which can occur during shutdown migration
* do not allow nodes to join during recovery
* when restarting lock mastery, do not ignore nodes which come up
* more than one node could become recovery master, fix this
* sleep to allow some time for heartbeat state to catch up to network
* extra debug info for bad recovery state problems
* make DLM_RECO_NODE_DATA_DONE a valid state for non-master recovery nodes
* prune all locks from dead nodes on $RECOVERY lock resources
* do NOT automatically add new nodes to mle nodemaps until they have properly
  joined the domain
* make sure dlm_pick_recovery_master only exits when all nodes have synced
* properly handle dlmunlock errors in dlm_pick_recovery_master
* do not propagate network errors in dlm_send_begin_reco_message
* dead nodes were not being put in the recovery map sometimes, fix this
* dlmunlock was failing to clear the unlock actions on DLM_DENIED
Signed-off-by: NKurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

A distributed lock manager built with the cluster file system use case
in mind. The OCFS2 dlm exposes a VMS style API, though things have
been simplified internally. The only lock levels implemented currently
are NLMODE, PRMODE and EXMODE.
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>
Signed-off-by: NKurt Hackel <kurt.hackel@oracle.com>