ocfs2: Pass lksbs back from stackglue ast/bast functions.

The stackglue ast and bast functions tried to maintain the fiction that
their arguments were void pointers.  In reality, stack_user.c had to
know that the argument was an ocfs2_lock_res in order to get the status
off of the lksb.  That's ugly.

This changes stackglue to always pass the lksb as the argument to ast
and bast functions.  The caller can always use container_of() to get the
ocfs2_lock_res or user_dlm_lock_res.  The net effect to the caller is
zero.  They still get back the lockres in their ast.  stackglue gets
cleaner, and now can use the lksb itself.

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

1 files changed, 8 insertions, 11 deletions

diff --git a/fs/ocfs2/stackglue.c b/fs/ocfs2/stackglue.c
index f3df0ba..3500d98 100644
--- a/fs/ocfs2/stackglue.c
+++ b/fs/ocfs2/stackglue.c
@@ -233,35 +233,32 @@ EXPORT_SYMBOL_GPL(ocfs2_stack_glue_set_locking_protocol);
 
 
 /*
- * The ocfs2_dlm_lock() and ocfs2_dlm_unlock() functions take
- * "struct ocfs2_lock_res *astarg" instead of "void *astarg" because the
- * underlying stack plugins need to pilfer the lksb off of the lock_res.
- * If some other structure needs to be passed as an astarg, the plugins
- * will need to be given a different avenue to the lksb.
+ * The ocfs2_dlm_lock() and ocfs2_dlm_unlock() functions take no argument
+ * for the ast and bast functions.  They will pass the lksb to the ast
+ * and bast.  The caller can wrap the lksb with their own structure to
+ * get more information.
  */
 int ocfs2_dlm_lock(struct ocfs2_cluster_connection *conn,
 		   int mode,
 		   union ocfs2_dlm_lksb *lksb,
 		   u32 flags,
 		   void *name,
-		   unsigned int namelen,
-		   struct ocfs2_lock_res *astarg)
+		   unsigned int namelen)
 {
 	BUG_ON(lproto == NULL);
 
 	return active_stack->sp_ops->dlm_lock(conn, mode, lksb, flags,
-					      name, namelen, astarg);
+					      name, namelen);
 }
 EXPORT_SYMBOL_GPL(ocfs2_dlm_lock);
 
 int ocfs2_dlm_unlock(struct ocfs2_cluster_connection *conn,
 		     union ocfs2_dlm_lksb *lksb,
-		     u32 flags,
-		     struct ocfs2_lock_res *astarg)
+		     u32 flags)
 {
 	BUG_ON(lproto == NULL);
 
-	return active_stack->sp_ops->dlm_unlock(conn, lksb, flags, astarg);
+	return active_stack->sp_ops->dlm_unlock(conn, lksb, flags);
 }
 EXPORT_SYMBOL_GPL(ocfs2_dlm_unlock);