[SCSI] libiscsi: iscsi_session_setup to allow for private space

This patch contains changes that allow iscsi_session_setup
to allocate private space for LLD's

Signed-off-by: Jayamohan Kallickal <jayamohank@serverengines.com>
Acked-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index 8dc73c489a17..f1a4246f890c 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -2436,7 +2436,7 @@ static void iscsi_host_dec_session_cnt(struct Scsi_Host *shost)
  */
 struct iscsi_cls_session *
 iscsi_session_setup(struct iscsi_transport *iscsit, struct Scsi_Host *shost,
-                    uint16_t cmds_max, int cmd_task_size,
+                    uint16_t cmds_max, int dd_size, int cmd_task_size,
                     uint32_t initial_cmdsn, unsigned int id)
 {
         struct iscsi_host *ihost = shost_priv(shost);
@@ -2486,7 +2486,8 @@ iscsi_session_setup(struct iscsi_transport *iscsit, struct Scsi_Host *shost,
         scsi_cmds = total_cmds - ISCSI_MGMT_CMDS_MAX;
 
         cls_session = iscsi_alloc_session(shost, iscsit,
-                                          sizeof(struct iscsi_session));
+                                          sizeof(struct iscsi_session) +
+                                          dd_size);
         if (!cls_session)
                 goto dec_session_count;
         session = cls_session->dd_data;
@@ -2503,6 +2504,7 @@ iscsi_session_setup(struct iscsi_transport *iscsit, struct Scsi_Host *shost,
         session->max_cmdsn = initial_cmdsn + 1;
         session->max_r2t = 1;
         session->tt = iscsit;
+        session->dd_data = cls_session->dd_data + sizeof(*session);
         mutex_init(&session->eh_mutex);
         spin_lock_init(&session->lock);