[SCSI] libiscsi: prepare libiscsi for new offload engines by modifying unsol data code

cxgb3i offloads data transfers. It does not offload the entire scsi/iscsi
procssing like qla4xxx and it does not offload the iscsi sequence
processing like how bnx2i does. cxgb3i relies on iscsi_tcp for the
seqeunce handling so this changes how we transfer unsolicitied data by
adding a common r2t struct and helpers.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h
index c667cc396545..c928234c018f 100644
--- a/include/scsi/scsi_transport_iscsi.h
+++ b/include/scsi/scsi_transport_iscsi.h
@@ -113,10 +113,15 @@ struct iscsi_transport {
                          char *data, uint32_t data_size);
         void (*get_stats) (struct iscsi_cls_conn *conn,
                            struct iscsi_stats *stats);
+
         int (*init_task) (struct iscsi_task *task);
         int (*xmit_task) (struct iscsi_task *task);
-        void (*cleanup_task) (struct iscsi_conn *conn,
-                                  struct iscsi_task *task);
+        void (*cleanup_task) (struct iscsi_task *task);
+
+        int (*alloc_pdu) (struct iscsi_task *task);
+        int (*xmit_pdu) (struct iscsi_task *task);
+        int (*init_pdu) (struct iscsi_task *task, unsigned int offset,
+                         unsigned int count);
         void (*session_recovery_timedout) (struct iscsi_cls_session *session);
         struct iscsi_endpoint *(*ep_connect) (struct sockaddr *dst_addr,
                                               int non_blocking);