path: root/fs/ocfs2/dlm/dlmdomain.c
diff options
authorxuejiufei <xuejiufei@huawei.com>2016-03-15 14:53:08 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-03-15 16:55:16 -0700
commit60d663cb527340c87c6cb98842e90a43243e1607 (patch)
tree759b66e37ff17a64cf23a15fc5efc53f96861567 /fs/ocfs2/dlm/dlmdomain.c
parentocfs2/dlm: fix a typo in dlmcommon.h (diff)
ocfs2/dlm: add DEREF_DONE message
This series of patches is to fix the dis-order issue of setting/clearing refmap bit described below. Node 1 Node 2(master) dlmlock dlm_do_master_request dlm_master_request_handler -> dlm_lockres_set_refmap_bit dlmlock succeed dlmunlock succeed dlm_purge_lockres dlm_deref_handler -> find lock resource is in DLM_LOCK_RES_SETREF_INPROG state, so dispatch a deref work dlm_purge_lockres succeed. call dlmlock again dlm_do_master_request dlm_master_request_handler -> dlm_lockres_set_refmap_bit deref work trigger, call dlm_lockres_clear_refmap_bit to clear Node 1 from refmap dlm_purge_lockres succeed dlm_send_remote_lock_request return DLM_IVLOCKID because the lockres is not exist BUG if the lockres is $RECOVERY This series of patches add a new message to keep the order of set and clear. Other nodes can purge the lock resource only after the refmap bit on master is cleared. This patch is to add DEREF_DONE message and corresponding handler. Node can purge the lock resource after receiving this message. As a new message is added, so increase the minor number of dlm protocol version. Signed-off-by: xuejiufei <xuejiufei@huawei.com> Cc: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Reviewed-by: Joseph Qi <joseph.qi@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
1 files changed, 10 insertions, 1 deletions
diff --git a/fs/ocfs2/dlm/dlmdomain.c b/fs/ocfs2/dlm/dlmdomain.c
index 2ee7fe747cea..c73c68efdf67 100644
--- a/fs/ocfs2/dlm/dlmdomain.c
+++ b/fs/ocfs2/dlm/dlmdomain.c
@@ -132,10 +132,13 @@ static DECLARE_WAIT_QUEUE_HEAD(dlm_domain_events);
* - Message DLM_QUERY_NODEINFO added to allow online node removes
* New in version 1.2:
* - Message DLM_BEGIN_EXIT_DOMAIN_MSG added to mark start of exit domain
+ * New in version 1.3:
+ * - Message DLM_DEREF_LOCKRES_DONE added to inform non-master that the
+ * refmap is cleared
static const struct dlm_protocol_version dlm_protocol = {
.pv_major = 1,
- .pv_minor = 2,
+ .pv_minor = 3,
@@ -1853,7 +1856,13 @@ static int dlm_register_domain_handlers(struct dlm_ctxt *dlm)
sizeof(struct dlm_exit_domain),
dlm, NULL, &dlm->dlm_domain_handlers);
+ if (status)
+ goto bail;
+ status = o2net_register_handler(DLM_DEREF_LOCKRES_DONE, dlm->key,
+ sizeof(struct dlm_deref_lockres_done),
+ dlm_deref_lockres_done_handler,
+ dlm, NULL, &dlm->dlm_domain_handlers);
if (status)