ocfs2: Hang the locking proto on the cluster conn and use it in asts.

With the ocfs2_cluster_connection hanging off of the ocfs2_dlm_lksb, we
have access to it in the ast and bast wrapper functions.  Attach the
ocfs2_locking_protocol to the conn.

Now, instead of refering to a static variable for ast/bast pointers, the
wrappers can look at the connection.  This means different connections
can have different ast/bast pointers, and it reduces the need for the
static pointer.

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

4 files changed, 9 insertions, 18 deletions

diff --git a/fs/ocfs2/stack_o2cb.c b/fs/ocfs2/stack_o2cb.c
index fa9dd79c3615..7020e1253ffa 100644
--- a/fs/ocfs2/stack_o2cb.c
+++ b/fs/ocfs2/stack_o2cb.c
@@ -163,28 +163,21 @@ static void o2dlm_lock_ast_wrapper(void *astarg)
 {
         struct ocfs2_dlm_lksb *lksb = astarg;
 
-        BUG_ON(o2cb_stack.sp_proto == NULL);
-
-        o2cb_stack.sp_proto->lp_lock_ast(lksb);
+        lksb->lksb_conn->cc_proto->lp_lock_ast(lksb);
 }
 
 static void o2dlm_blocking_ast_wrapper(void *astarg, int level)
 {
         struct ocfs2_dlm_lksb *lksb = astarg;
 
-        BUG_ON(o2cb_stack.sp_proto == NULL);
-
-        o2cb_stack.sp_proto->lp_blocking_ast(lksb, level);
+        lksb->lksb_conn->cc_proto->lp_blocking_ast(lksb, level);
 }
 
 static void o2dlm_unlock_ast_wrapper(void *astarg, enum dlm_status status)
 {
         struct ocfs2_dlm_lksb *lksb = astarg;
-
         int error = dlm_status_to_errno(status);
 
-        BUG_ON(o2cb_stack.sp_proto == NULL);
-
         /*
          * In o2dlm, you can get both the lock_ast() for the lock being
          * granted and the unlock_ast() for the CANCEL failing.  A
@@ -199,7 +192,7 @@ static void o2dlm_unlock_ast_wrapper(void *astarg, enum dlm_status status)
         if (status == DLM_CANCELGRANT)
                 return;
 
-        o2cb_stack.sp_proto->lp_unlock_ast(lksb, error);
+        lksb->lksb_conn->cc_proto->lp_unlock_ast(lksb, error);
 }
 
 static int o2cb_dlm_lock(struct ocfs2_cluster_connection *conn,
@@ -284,7 +277,7 @@ static int o2cb_cluster_connect(struct ocfs2_cluster_connection *conn)
         struct dlm_protocol_version fs_version;
 
         BUG_ON(conn == NULL);
-        BUG_ON(o2cb_stack.sp_proto == NULL);
+        BUG_ON(conn->cc_proto == NULL);
 
         /* for now we only have one cluster/node, make sure we see it
          * in the heartbeat universe */
diff --git a/fs/ocfs2/stack_user.c b/fs/ocfs2/stack_user.c
index 31276bac78f5..b4cf616ef423 100644
--- a/fs/ocfs2/stack_user.c
+++ b/fs/ocfs2/stack_user.c
@@ -668,8 +668,6 @@ static void fsdlm_lock_ast_wrapper(void *astarg)
         struct ocfs2_dlm_lksb *lksb = astarg;
         int status = lksb->lksb_fsdlm.sb_status;
 
-        BUG_ON(ocfs2_user_plugin.sp_proto == NULL);
-
         /*
          * For now we're punting on the issue of other non-standard errors
          * where we can't tell if the unlock_ast or lock_ast should be called.
@@ -681,18 +679,16 @@ static void fsdlm_lock_ast_wrapper(void *astarg)
          */
 
         if (status == -DLM_EUNLOCK || status == -DLM_ECANCEL)
-                ocfs2_user_plugin.sp_proto->lp_unlock_ast(lksb, 0);
+                lksb->lksb_conn->cc_proto->lp_unlock_ast(lksb, 0);
         else
-                ocfs2_user_plugin.sp_proto->lp_lock_ast(lksb);
+                lksb->lksb_conn->cc_proto->lp_lock_ast(lksb);
 }
 
 static void fsdlm_blocking_ast_wrapper(void *astarg, int level)
 {
         struct ocfs2_dlm_lksb *lksb = astarg;
 
-        BUG_ON(ocfs2_user_plugin.sp_proto == NULL);
-
-        ocfs2_user_plugin.sp_proto->lp_blocking_ast(lksb, level);
+        lksb->lksb_conn->cc_proto->lp_blocking_ast(lksb, level);
 }
 
 static int user_dlm_lock(struct ocfs2_cluster_connection *conn,
diff --git a/fs/ocfs2/stackglue.c b/fs/ocfs2/stackglue.c
index 8ef9a574315e..010ecabbdeb5 100644
--- a/fs/ocfs2/stackglue.c
+++ b/fs/ocfs2/stackglue.c
@@ -343,6 +343,7 @@ int ocfs2_cluster_connect(const char *stack_name,
         new_conn->cc_recovery_handler = recovery_handler;
         new_conn->cc_recovery_data = recovery_data;
 
+        new_conn->cc_proto = lproto;
         /* Start the new connection at our maximum compatibility level */
         new_conn->cc_version = lproto->lp_max_version;
 
diff --git a/fs/ocfs2/stackglue.h b/fs/ocfs2/stackglue.h
index bb32926912ba..cf8bac23ae09 100644
--- a/fs/ocfs2/stackglue.h
+++ b/fs/ocfs2/stackglue.h
@@ -100,6 +100,7 @@ struct ocfs2_cluster_connection {
         char cc_name[GROUP_NAME_MAX];
         int cc_namelen;
         struct ocfs2_protocol_version cc_version;
+        struct ocfs2_locking_protocol *cc_proto;
         void (*cc_recovery_handler)(int node_num, void *recovery_data);
         void *cc_recovery_data;
         void *cc_lockspace;