ocfs2: Added post handler callable function in o2net message handler

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>

1 files changed, 12 insertions, 6 deletions

diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c
index 38d714645309..6d4a83d50152 100644
--- a/fs/ocfs2/dlm/dlmrecovery.c
+++ b/fs/ocfs2/dlm/dlmrecovery.c
@@ -818,7 +818,8 @@ static int dlm_request_all_locks(struct dlm_ctxt *dlm, u8 request_from,
 
 }
 
-int dlm_request_all_locks_handler(struct o2net_msg *msg, u32 len, void *data)
+int dlm_request_all_locks_handler(struct o2net_msg *msg, u32 len, void *data,
+                                  void **ret_data)
 {
         struct dlm_ctxt *dlm = data;
         struct dlm_lock_request *lr = (struct dlm_lock_request *)msg->buf;
@@ -975,7 +976,8 @@ static int dlm_send_all_done_msg(struct dlm_ctxt *dlm, u8 dead_node, u8 send_to)
 }
 
 
-int dlm_reco_data_done_handler(struct o2net_msg *msg, u32 len, void *data)
+int dlm_reco_data_done_handler(struct o2net_msg *msg, u32 len, void *data,
+                               void **ret_data)
 {
         struct dlm_ctxt *dlm = data;
         struct dlm_reco_data_done *done = (struct dlm_reco_data_done *)msg->buf;
@@ -1331,7 +1333,8 @@ error:
  * do we spin?  returning an error only delays the problem really
  */
 
-int dlm_mig_lockres_handler(struct o2net_msg *msg, u32 len, void *data)
+int dlm_mig_lockres_handler(struct o2net_msg *msg, u32 len, void *data,
+                            void **ret_data)
 {
         struct dlm_ctxt *dlm = data;
         struct dlm_migratable_lockres *mres =
@@ -1624,7 +1627,8 @@ int dlm_do_master_requery(struct dlm_ctxt *dlm, struct dlm_lock_resource *res,
 /* this function cannot error, so unless the sending
  * or receiving of the message failed, the owner can
  * be trusted */
-int dlm_master_requery_handler(struct o2net_msg *msg, u32 len, void *data)
+int dlm_master_requery_handler(struct o2net_msg *msg, u32 len, void *data,
+                               void **ret_data)
 {
         struct dlm_ctxt *dlm = data;
         struct dlm_master_requery *req = (struct dlm_master_requery *)msg->buf;
@@ -2600,7 +2604,8 @@ retry:
         return ret;
 }
 
-int dlm_begin_reco_handler(struct o2net_msg *msg, u32 len, void *data)
+int dlm_begin_reco_handler(struct o2net_msg *msg, u32 len, void *data,
+                           void **ret_data)
 {
         struct dlm_ctxt *dlm = data;
         struct dlm_begin_reco *br = (struct dlm_begin_reco *)msg->buf;
@@ -2728,7 +2733,8 @@ stage2:
         return ret;
 }
 
-int dlm_finalize_reco_handler(struct o2net_msg *msg, u32 len, void *data)
+int dlm_finalize_reco_handler(struct o2net_msg *msg, u32 len, void *data,
+                              void **ret_data)
 {
         struct dlm_ctxt *dlm = data;
         struct dlm_finalize_reco *fr = (struct dlm_finalize_reco *)msg->buf;