1 files changed, 30 insertions, 9 deletions

diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h
index 61e53f14f7e1..7360e1916e75 100644
--- a/include/scsi/libiscsi.h
+++ b/include/scsi/libiscsi.h
@@ -30,6 +30,7 @@
 #include <linux/workqueue.h>
 #include <scsi/iscsi_proto.h>
 #include <scsi/iscsi_if.h>
+#include <scsi/scsi_transport_iscsi.h>
 
 struct scsi_transport_template;
 struct scsi_host_template;
@@ -70,12 +71,12 @@ enum {
 /* Connection suspend "bit" */
 #define ISCSI_SUSPEND_BIT               1
 
-#define ISCSI_ITT_MASK                  (0x1fff)
+#define ISCSI_ITT_MASK                  0x1fff
 #define ISCSI_TOTAL_CMDS_MAX            4096
 /* this must be a power of two greater than ISCSI_MGMT_CMDS_MAX */
 #define ISCSI_TOTAL_CMDS_MIN            16
 #define ISCSI_AGE_SHIFT                 28
-#define ISCSI_AGE_MASK                  (0xf << ISCSI_AGE_SHIFT)
+#define ISCSI_AGE_MASK                  0xf
 
 #define ISCSI_ADDRESS_BUF_LEN           64
 
@@ -93,24 +94,38 @@ enum {
         ISCSI_TASK_RUNNING,
 };
 
+struct iscsi_r2t_info {
+        __be32                  ttt;            /* copied from R2T */
+        __be32                  exp_statsn;     /* copied from R2T */
+        uint32_t                data_length;    /* copied from R2T */
+        uint32_t                data_offset;    /* copied from R2T */
+        int                     data_count;     /* DATA-Out payload progress */
+        int                     datasn;
+        /* LLDs should set/update these values */
+        int                     sent;           /* R2T sequence progress */
+};
+
 struct iscsi_task {
         /*
          * Because LLDs allocate their hdr differently, this is a pointer
          * and length to that storage. It must be setup at session
          * creation time.
          */
-        struct iscsi_cmd        *hdr;
+        struct iscsi_hdr        *hdr;
         unsigned short          hdr_max;
         unsigned short          hdr_len;        /* accumulated size of hdr used */
+        /* copied values in case we need to send tmfs */
+        itt_t                   hdr_itt;
+        __be32                  cmdsn;
+        uint8_t                 lun[8];
+
         int                     itt;            /* this ITT */
 
-        uint32_t                unsol_datasn;
         unsigned                imm_count;      /* imm-data (bytes)   */
-        unsigned                unsol_count;    /* unsolicited (bytes)*/
         /* offset in unsolicited stream (bytes); */
-        unsigned                unsol_offset;
-        unsigned                data_count;     /* remaining Data-Out */
+        struct iscsi_r2t_info   unsol_r2t;
         char                    *data;          /* mgmt payload */
+        unsigned                data_count;
         struct scsi_cmnd        *sc;            /* associated SCSI cmd*/
         struct iscsi_conn       *conn;          /* used connection    */
 
@@ -121,6 +136,11 @@ struct iscsi_task {
         void                    *dd_data;       /* driver/transport data */
 };
 
+static inline int iscsi_task_has_unsol_data(struct iscsi_task *task)
+{
+        return task->unsol_r2t.data_length > task->unsol_r2t.sent;
+}
+
 static inline void* iscsi_next_hdr(struct iscsi_task *task)
 {
         return (void*)task->hdr + task->hdr_len;
@@ -376,8 +396,9 @@ extern void iscsi_suspend_tx(struct iscsi_conn *conn);
  * pdu and task processing
  */
 extern void iscsi_update_cmdsn(struct iscsi_session *, struct iscsi_nopin *);
-extern void iscsi_prep_unsolicit_data_pdu(struct iscsi_task *,
-                                        struct iscsi_data *hdr);
+extern void iscsi_prep_data_out_pdu(struct iscsi_task *task,
+                                    struct iscsi_r2t_info *r2t,
+                                    struct iscsi_data *hdr);
 extern int iscsi_conn_send_pdu(struct iscsi_cls_conn *, struct iscsi_hdr *,
                                 char *, uint32_t);
 extern int iscsi_complete_pdu(struct iscsi_conn *, struct iscsi_hdr *,