[SCSI] zfcp: Add trace records for recovery thread and its queues

This patch writes trace records which provide information about the
operation of the zfcp error recovery thread and the queues it works
on.

Signed-off-by: Martin Peschke <mp3@de.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c
index 2dc8110ebf74..f9383f068169 100644
--- a/drivers/s390/scsi/zfcp_erp.c
+++ b/drivers/s390/scsi/zfcp_erp.c
@@ -788,6 +788,7 @@ zfcp_erp_action_ready(struct zfcp_erp_action *erp_action)
 
         zfcp_erp_action_to_ready(erp_action);
         up(&adapter->erp_ready_sem);
+        zfcp_rec_dbf_event_thread(2, adapter, 0);
 }
 
 /*
@@ -1027,6 +1028,7 @@ zfcp_erp_thread_kill(struct zfcp_adapter *adapter)
 
         atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, &adapter->status);
         up(&adapter->erp_ready_sem);
+        zfcp_rec_dbf_event_thread(2, adapter, 1);
 
         wait_event(adapter->erp_thread_wqh,
                    !atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP,
@@ -1084,7 +1086,9 @@ zfcp_erp_thread(void *data)
                  * no action in 'ready' queue to be processed and
                  * thread is not to be killed
                  */
+                zfcp_rec_dbf_event_thread(4, adapter, 1);
                 down_interruptible(&adapter->erp_ready_sem);
+                zfcp_rec_dbf_event_thread(5, adapter, 1);
                 debug_text_event(adapter->erp_dbf, 5, "a_th_woken");
         }
 
@@ -2150,7 +2154,9 @@ zfcp_erp_adapter_strategy_open_fsf_xconfig(struct zfcp_erp_action *erp_action)
                  * _must_ be the one belonging to the 'exchange config
                  * data' request.
                  */
+                zfcp_rec_dbf_event_thread(6, adapter, 1);
                 down(&adapter->erp_ready_sem);
+                zfcp_rec_dbf_event_thread(7, adapter, 1);
                 if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) {
                         ZFCP_LOG_INFO("error: exchange of configuration data "
                                       "for adapter %s timed out\n",
@@ -2207,7 +2213,9 @@ zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *erp_action)
         debug_text_event(adapter->erp_dbf, 6, "a_xport_ok");
 
         ret = ZFCP_ERP_SUCCEEDED;
+        zfcp_rec_dbf_event_thread(8, adapter, 1);
         down(&adapter->erp_ready_sem);
+        zfcp_rec_dbf_event_thread(9, adapter, 1);
         if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) {
                 ZFCP_LOG_INFO("error: exchange port data timed out (adapter "
                               "%s)\n", zfcp_get_busid_by_adapter(adapter));
@@ -3091,6 +3099,7 @@ zfcp_erp_action_enqueue(int action,
         /* finally put it into 'ready' queue and kick erp thread */
         list_add_tail(&erp_action->list, &adapter->erp_ready_head);
         up(&adapter->erp_ready_sem);
+        zfcp_rec_dbf_event_thread(1, adapter, 0);
         retval = 0;
  out:
         return retval;