ocfs2: Break out stackglue into modules.

We define the ocfs2_stack_plugin structure to represent a stack driver.
The o2cb stack code is split into stack_o2cb.c.  This becomes the
ocfs2_stack_o2cb.ko module.

The stackglue generic functions are similarly split into the
ocfs2_stackglue.ko module.  This module now provides an interface to
register drivers.  The ocfs2_stack_o2cb driver registers itself.  As
part of this interface, ocfs2_stackglue can load drivers on demand.
This is accomplished in ocfs2_cluster_connect().

ocfs2_cluster_disconnect() is now notified when a _hangup() is pending.
If a hangup is pending, it will not release the driver module and will
let _hangup() do that.

Signed-off-by: Joel Becker <joel.becker@oracle.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 8a9c84909be3..f62a9e4fc315 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -2641,7 +2641,7 @@ int ocfs2_dlm_init(struct ocfs2_super *osb)
                 mlog_errno(status);
                 mlog(ML_ERROR,
                      "could not find this host's node number\n");
-                ocfs2_cluster_disconnect(conn);
+                ocfs2_cluster_disconnect(conn, 0);
                 goto bail;
         }
 
@@ -2663,7 +2663,8 @@ bail:
         return status;
 }
 
-void ocfs2_dlm_shutdown(struct ocfs2_super *osb)
+void ocfs2_dlm_shutdown(struct ocfs2_super *osb,
+                        int hangup_pending)
 {
         mlog_entry_void();
 
@@ -2683,7 +2684,7 @@ void ocfs2_dlm_shutdown(struct ocfs2_super *osb)
         ocfs2_lock_res_free(&osb->osb_super_lockres);
         ocfs2_lock_res_free(&osb->osb_rename_lockres);
 
-        ocfs2_cluster_disconnect(osb->cconn);
+        ocfs2_cluster_disconnect(osb->cconn, hangup_pending);
         osb->cconn = NULL;
 
         ocfs2_dlm_shutdown_debug(osb);