2 files changed, 11 insertions, 0 deletions

diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h
index 192f8716aa9e..3a5662b2817e 100644
--- a/include/scsi/scsi.h
+++ b/include/scsi/scsi.h
@@ -426,6 +426,7 @@ static inline int scsi_is_wlun(unsigned int lun)
 #define SCSI_MLQUEUE_HOST_BUSY   0x1055
 #define SCSI_MLQUEUE_DEVICE_BUSY 0x1056
 #define SCSI_MLQUEUE_EH_RETRY    0x1057
+#define SCSI_MLQUEUE_TARGET_BUSY 0x1058
 
 /*
  *  Use these to separate status msg and our bytes
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index b49e725be039..a37a8148a310 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -238,6 +238,16 @@ struct scsi_target {
                                                  * for the device at a time. */
         unsigned int            pdt_1f_for_no_lun;      /* PDT = 0x1f */
                                                 /* means no lun present */
+        /* commands actually active on LLD. protected by host lock. */
+        unsigned int            target_busy;
+        /*
+         * LLDs should set this in the slave_alloc host template callout.
+         * If set to zero then there is not limit.
+         */
+        unsigned int            can_queue;
+        unsigned int            target_blocked;
+        unsigned int            max_target_blocked;
+#define SCSI_DEFAULT_TARGET_BLOCKED     3
 
         char                    scsi_level;
         struct execute_work     ew;