[SCSI] Add target alloc/destroy callbacks to the host template

This gives the HBA driver notice when a target is created and
destroyed to allow it to manage its own target based allocations
accordingly.

This is a much reduced verson of the original patch sent in by
James.Smart@Emulex.com

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index c018020d9160..63c91dd85ca1 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -154,7 +154,9 @@ struct scsi_target {
         unsigned int            id; /* target id ... replace
                                      * scsi_device.id eventually */
         unsigned long           create:1; /* signal that it needs to be added */
-        unsigned long           starget_data[0];
+        void                    *hostdata; /* available to low-level driver */
+        unsigned long           starget_data[0]; /* for the transport */
+        /* starget_data must be the last element!!!! */
 } __attribute__((aligned(sizeof(unsigned long))));
 
 #define to_scsi_target(d)       container_of(d, struct scsi_target, dev)