summaryrefslogtreecommitdiffstats
path: root/fs/ocfs2/dlm/dlmcommon.h
Commit message (Collapse)AuthorAgeFilesLines
* ocfs2: trivial endianness misannotationsAl Viro2012-05-291-3/+3
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* ocfs2/dlm: Cleanup dlm_wait_for_node_death() and dlm_wait_for_node_recovery()Sunil Mushran2011-07-241-2/+2
| | | | | | dlm_wait_for_node_death() and dlm_wait_for_node_recovery() needed a facelift. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
* ocfs2/dlm: Trace insert/remove of resource to/from hashSunil Mushran2011-07-241-3/+2
| | | | | | Add mlog to trace adding and removing the resource from/to the hash table. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
* ocfs2/dlm: Clean up refmap helpersSunil Mushran2011-07-241-40/+9
| | | | | | | Patch cleans up helpers that set/clear refmap bits and grab/drop inflight lock ref counts. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
* ocfs2/dlm: Add new dlm message DLM_BEGIN_EXIT_DOMAIN_MSGSunil Mushran2011-05-251-0/+2
| | | | | | | | | | | | | | | | | | | This patch adds a new dlm message DLM_BEGIN_EXIT_DOMAIN_MSG and ups the dlm protocol to 1.2. o2dlm sends this new message in dlm_unregister_domain() to mark the beginning of the exit domain. This message is sent to all nodes in the domain. Currently o2dlm has no way of informing other nodes of its impending exit. This information is useful as the other nodes could disregard the exiting node in certain operations. For example, in resource migration. If two or more nodes were umounting in parallel, it would be more efficient if o2dlm were to choose a non-exiting node to be the new master node rather than an exiting one. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Reviewed-by: Mark Fasheh <mfasheh@suse.com> Signed-off-by: Joel Becker <jlbec@evilplan.org>
* ocfs2/dlm: dlm_is_lockres_migrateable() returns booleanSunil Mushran2011-05-231-0/+12
| | | | | | | | | Patch cleans up the gunk added by commit 388c4bcb4e63e88fb1f312a2f5f9eb2623afcf5b. dlm_is_lockres_migrateable() now returns 1 if lockresource is deemed migrateable and 0 if not. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <jlbec@evilplan.org>
* ocfs2/dlm: Hard code the values for enumsSunil Mushran2010-12-221-43/+43
| | | | | | | | | In o2dlm, the enumerated message values are part of the protocol. The patch hard codes each value so as to reduce the chance of an editing error causing a protocol mismatch. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com>
* ocfs2/dlm: Add message DLM_QUERY_NODEINFOSunil Mushran2010-10-071-0/+17
| | | | | | | | | Adds new dlm message DLM_QUERY_NODEINFO that sends the attributes of all registered nodes. This message is sent if the negotiated dlm protocol is 1.1 or higher. If the information of the joining node does not match that of any existing nodes, the join domain request is rejected. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
* ocfs2/dlm: Add message DLM_QUERY_REGIONSunil Mushran2010-10-091-1/+11
| | | | | | | | | Adds new dlm message DLM_QUERY_REGION that sends the names of all active heartbeat regions. This message is only sent in the global heartbeat mode. If the regions in the joining node do not fully match the ones in the active nodes, the join domain request is rejected. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
* o2dlm: force free mles during dlm exitSrinivas Eeda2010-09-231-0/+1
| | | | | | | | | | | | | While umounting, a block mle doesn't get freed if dlm is shutdown after master request is received but before assert master. This results in unclean shutdown of dlm domain. This patch frees all mles that lie around after other nodes were notified about exiting the dlm and marking dlm state as leaving. Only block mles are expected to be around, so we log ERROR for other mles but still free them. Signed-off-by: Srinivas Eeda <srinivas.eeda@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com>
* ocfs2:dlm: avoid dlm->ast_lock lockres->spinlock dependency breakWengang Wang2010-05-181-0/+2
| | | | | | | | | | | | | | | | Currently we process a dirty lockres with the lockres->spinlock taken. While during the process, we may need to lock on dlm->ast_lock. This breaks the dependency of dlm->ast_lock(lock first) and lockres->spinlock(lock second). This patch fixes the problem. Since we can't release lockres->spinlock, we have to take dlm->ast_lock just before taking the lockres->spinlock and release it after lockres->spinlock is released. And use __dlm_queue_bast()/__dlm_queue_ast(), the nolock version, in dlm_shuffle_lists(). There are no too many locks on a lockres, so there is no performance harm. Signed-off-by: Wengang Wang <wen.gang.wang@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com>
* ocfs2/dlm: Increase o2dlm lockres hash sizeSunil Mushran2010-05-051-1/+1
| | | | | | | | | Lockres hash size of 16KB is far too small for large filesystems (where we have hundreds of thousands of lock resources stored in the table). This patch increases it to 128KB. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com>
* ocfs2/dlm: Remove struct dlm_lock_name in struct dlm_master_list_entrySunil Mushran2009-04-031-10/+4
| | | | | | | | | | | This patch removes struct dlm_lock_name and adds the entries directly to struct dlm_master_list_entry. Under the new scheme, both mles that are backed by a lockres or not, will have the name populated in mle->mname. This allows us to get rid of code that was figuring out the location of the mle name. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
* ocfs2/dlm: dlm_set_lockres_owner() and dlm_change_lockres_owner() inlinedSunil Mushran2009-04-031-3/+18
| | | | | | | This patch inlines dlm_set_lockres_owner() and dlm_change_lockres_owner(). Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
* ocfs2/dlm: Improve lockres countsSunil Mushran2009-04-031-3/+2
| | | | | | | | | | | | | This patch replaces the lockres counts that tracked the number number of locally and remotely mastered lockres' with a current and total count. The total count is the number of lockres' that have been created since the dlm domain was created. The number of locally and remotely mastered counts can be computed using the locking_state output. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
* ocfs2/dlm: Track number of mlesSunil Mushran2009-04-031-1/+4
| | | | | | | | | | | The lifetime of a mle is limited to the duration of the lockres mastery process. While typically this lifetime is fairly short, we have noticed the number of mles explode under certain circumstances. This patch tracks the number of each different types of mles and should help us determine how best to speed up the mastery process. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
* ocfs2/dlm: Activate dlm->master_hash for master list entriesSunil Mushran2009-04-031-2/+2
| | | | | | | | | With this patch, the mles are stored in a hash and not a simple list. This should improve the mle lookup time when the number of outstanding masteries is large. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
* ocfs2/dlm: Create and destroy the dlm->master_hashSunil Mushran2009-04-031-0/+8
| | | | | | | This patch adds code to create and destroy the dlm->master_hash. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
* ocfs2/dlm: Clean up struct dlm_lock_nameSunil Mushran2009-04-031-4/+4
| | | | | | | | | | | For master mle, the name it stored in the attached lockres in struct qstr. For block and migration mle, the name is stored inline in struct dlm_lock_name. This patch attempts to make struct dlm_lock_name look like a struct qstr. While we could use struct qstr, we don't because we want to avoid having to malloc and free the lockname string as the mle's lifetime is fairly short. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
* ocfs2/dlm: Encapsulate adding and removing of mle from dlm->master_listSunil Mushran2009-04-031-0/+3
| | | | | | | | | This patch encapsulates adding and removing of the mle from the dlm->master_list. This patch is part of the series of patches that converts the mle list to a mle hash. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
* ocfs2/dlm: Fix race in adding/removing lockres' to/from the tracking listSunil Mushran2009-01-051-0/+3
| | | | | | | | | | | | | | This patch adds a new lock, dlm->tracking_lock, to protect adding/removing lockres' to/from the dlm->tracking_list. We were previously using dlm->spinlock for the same, but that proved inadequate as we could be freeing a lockres from a context that did not hold that lock. As the new lock only protects this list, we can explicitly take it when removing the lockres from the tracking list. This bug was exposed when testing multiple processes concurrently flock() the same file. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
* ocfs2/dlm: Move struct dlm_master_list_entry to dlmcommon.hSunil Mushran2008-04-181-0/+35
| | | | | | | | | | This patch moves some mle related definitions from dlmmaster.c to dlmcommon.h. Future patches need these definitions to dump mle debugging information. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.beckeroracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
* ocfs2/dlm: Dump the dlm state in a debugfs fileSunil Mushran2008-04-181-0/+1
| | | | | | | | | This patch dumps the dlm state (dlm_ctxt) into a debugfs file. Useful for debugging. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
* ocfs2/dlm: Create debugfs dirsSunil Mushran2008-04-181-0/+2
| | | | | | | | | This patch creates the debugfs directories that will hold the files to be used to dump the dlm state. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
* ocfs2/dlm: Link all lockres' to a tracking listSunil Mushran2008-04-181-0/+4
| | | | | | | | | | This patch links all the lockres' to a tracking list in dlm_ctxt. We will use this in an upcoming patch that will walk the entire list and to dump the lockres states to a debugfs file. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
* ocfs2/dlm: Create slabcaches for lock and lockresSunil Mushran2008-04-181-0/+7
| | | | | | | | | | | This patch makes the o2dlm allocate memory for lockres, lockname and lock structures from slabcaches rather than kmalloc. This allows us to not only make these allocs more efficient but also allows us to track the memory being consumed by these structures. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
* ocfs2/dlm: Add missing dlm_lockres_put()s in migration pathSunil Mushran2008-03-101-0/+1
| | | | | | | | | | | | | | | | During migration, the recovery master node may be asked to master a lockres it may not know about. In that case, it would not only have to create a lockres and add it to the hash, but also remember to to do the _put_ corresponding to the kref_init in dlm_init_lockres(), as soon as the migration is completed. Yes, we don't wait for the dlm_purge_lockres() to do that matching put. Note the ref added for it being in the hash protects the lockres from being freed prematurely. This patch adds that missing put, as described above, to plug a memleak. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: Fix endian bug in o2dlm protocol negotiation.Joel Becker2008-03-101-9/+11
| | | | | | | | | | | | | | | struct dlm_query_join_packet is made up of four one-byte fields. They are effectively in big-endian order already. However, little-endian machines swap them before putting the packet on the wire (because query_join's response is a status, and that status is treated as a u32 on the wire). Thus, a big-endian and little-endian machines will treat this structure differently. The solution is to have little-endian machines swap the structure when converting from the structure to the u32 representation. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: Negotiate locking protocol versions.Joel Becker2008-02-061-1/+23
| | | | | | | | | | | | | | | | | | | | | | | Currently, when ocfs2 nodes connect via TCP, they advertise their compatibility level. If the versions do not match, two nodes cannot speak to each other and they disconnect. As a result, this provides no forward or backwards compatibility. This patch implements a simple protocol negotiation at the dlm level by introducing a major/minor version number scheme for entities that communicate. Specifically, o2dlm has a major/minor version for interaction with o2dlm on other nodes, and ocfs2 itself has a major/minor version for interacting with the filesystem on other nodes. This will allow rolling upgrades of ocfs2 clusters when changes to the locking or network protocols can be done in a backwards compatible manner. In those cases, only the minor number is changed and the negotatied protocol minor is returned from dlm join. In the far less likely event that a required protocol change makes backwards compatibility impossible, we simply bump the major number. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2_dlm: disallow a domain join if node maps mismatchSrinivas Eeda2007-02-071-0/+4
| | | | | | | | | | | | | | There is a small window where a joining node may not see the node(s) that just died but are still part of the domain. To fix this, we must disallow join requests if the joining node has a different node map. A new field node_map is added to dlm_query_join_request to send the current nodes nodemap along with join request. On the receiving end the nodes that are part of the cluster verifies if this new node sees all the nodes that are still part of the cluster. They disallow the join if the maps mismatch. Signed-off-by: Srinivas Eeda <srinivas.eeda@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2_dlm: Ensure correct ordering of set/clear refmap bit on lockresSunil Mushran2007-02-071-0/+6
| | | | | | | | | | | | Eventhough the set refmap bit message is sent before the clear refmap message, currently there is no guarentee that the set message will be handled before the clear. This patch prevents the clear refmap to be processed while the node is sending assert master messages to other nodes. (The set refmap message is sent as a response to the assert master request). Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2_dlm: Calling post handler function in assert master handlerKurt Hackel2007-02-071-0/+2
| | | | | | | | | | This patch prevents the dlm from sending the clear refmap message before the set refmap. We use the newly created post function handler routine to accomplish the task. Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com> Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: Added post handler callable function in o2net message handlerKurt Hackel2007-02-071-14/+28
| | | | | | | | | | | | | Currently o2net allows one handler function per message type. This patch adds the ability to call another function to be called after the handler has returned the message to the other node. Handlers are now given the option of returning a context (in the form of a void **) which will be passed back into the post message handler function. Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com> Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2_dlm: Fixes race between migrate and dirtyKurt Hackel2007-02-071-0/+1
| | | | | | | | | | | dlmthread was removing lockres' from the dirty list and resetting the dirty flag before shuffling the list. This patch retains the dirty state flag until the lists are shuffled. Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com> Signed-off-by: Sunil Mushran <Sunil.Mushran@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* [PATCH] fs/ocfs2/dlm/: make functions staticAdrian Bunk2007-02-071-6/+0
| | | | | | | This patch makes some needlessly global functions static. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2_dlm: fix cluster-wide refcounting of lock resourcesKurt Hackel2007-02-071-4/+71
| | | | | | | | | | | This was previously broken and migration of some locks had to be temporarily disabled. We use a new (and backward-incompatible) set of network messages to account for all references to a lock resources held across the cluster. once these are all freed, the master node may then free the lock resource memory once its local references are dropped. Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* WorkStruct: make allyesconfigDavid Howells2006-11-221-1/+1
| | | | | | Fix up for make allyesconfig. Signed-Off-By: David Howells <dhowells@redhat.com>
* ocfs2: Allow binary names in the DLMMark Fasheh2006-09-241-0/+1
| | | | | | | | 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: Mark Fasheh <mark.fasheh@oracle.com>
* [PATCH] fs/ocfs2/dlm/dlmrecovery.c: make dlm_lockres_master_requery() staticAdrian Bunk2006-06-291-2/+0
| | | | | | | dlm_lockres_master_requery() became global without any external usage. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: move dlm work to a private work queueKurt Hackel2006-06-261-0/+1
| | | | | | | | The work that is done can block for long periods of time and so is not appropriate for keventd. Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: wait for recovery when starting lock masteryKurt Hackel2006-06-261-0/+1
| | | | | Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: give the dlm dirty list a reference on the lockresKurt Hackel2006-06-261-3/+11
| | | | | Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: make dlm recovery finalization 2 stageKurt Hackel2006-06-261-2/+4
| | | | | | | Makes it easier for the recovery process to deal with node death. Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: dlm recovery / lockres reference count fixKurt Hackel2006-06-261-0/+1
| | | | | | | Take a reference on lockres structures while they are on the recovery list. Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: Fix empty lvb checkKurt Hackel2006-06-261-0/+9
| | | | | | | | The check for an empty lvb should check the entire buffer not just the first byte. Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* [PATCH] ocfs2: Alloc at least a page for the DLM hashJoel Becker2006-06-261-2/+6
| | | | | | | | | The OCFS2 DLM allocates a number of pages for a hash to lookup locks. There was a bug where a PAGE_SIZE bigger than the hash size (eg, 64K pages) would result in zero pages allocated. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: allocate lockres hash pages in an arrayDaniel Phillips2006-06-261-2/+10
| | | | | | | | This allows us to have a hash table greater than a single page which greatly improves dlm performance on some tests. Signed-off-by: Daniel Phillips <phillips@google.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: inline dlm_lockres_get()Mark Fasheh2006-06-261-1/+6
| | | | | | It's called on every lookup so this might help performance a bit. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: calculate lockid hash values outside of the spinlockMark Fasheh2006-06-261-1/+5
| | | | | | Fixes a performance bug - pointed out by Andrew. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: move lockres qstr next to hlist_node structureMark Fasheh2006-06-261-1/+1
| | | | | | | Gains us a bit of performance on loads which heavily hit the lockres hash. Patch suggested by Daniel Phillips <phillips@google.com>. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-24 22:51:07 +0000