[SCSI] iscsi: pass ep connect shost

When we create the tcp/ip connection by calling ep_connect, we currently
just go by the routing table info.

I think there are two problems with this.

1. Some drivers do not have access to a routing table. Some drivers like
qla4xxx do not even know about other ports.

2. If you have two initiator ports on the same subnet, the user may have
set things up so that session1 was supposed to be run through port1. and
session2 was supposed to be run through port2. It looks like we could
end with both sessions going through one of the ports.

Fixes for cxgb3i from Karen Xie.

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

2 files changed, 8 insertions, 2 deletions

diff --git a/include/scsi/iscsi_if.h b/include/scsi/iscsi_if.h
index d0ed5226f8c4..2c1a4af9eafb 100644
--- a/include/scsi/iscsi_if.h
+++ b/include/scsi/iscsi_if.h
@@ -50,7 +50,8 @@ enum iscsi_uevent_e {
         ISCSI_UEVENT_TGT_DSCVR          = UEVENT_BASE + 15,
         ISCSI_UEVENT_SET_HOST_PARAM     = UEVENT_BASE + 16,
         ISCSI_UEVENT_UNBIND_SESSION     = UEVENT_BASE + 17,
-        ISCSI_UEVENT_CREATE_BOUND_SESSION       = UEVENT_BASE + 18,
+        ISCSI_UEVENT_CREATE_BOUND_SESSION               = UEVENT_BASE + 18,
+        ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST  = UEVENT_BASE + 19,
 
         /* up events */
         ISCSI_KEVENT_RECV_PDU           = KEVENT_BASE + 1,
@@ -131,6 +132,10 @@ struct iscsi_uevent {
                 struct msg_transport_connect {
                         uint32_t        non_blocking;
                 } ep_connect;
+                struct msg_transport_connect_through_host {
+                        uint32_t        host_no;
+                        uint32_t        non_blocking;
+                } ep_connect_through_host;
                 struct msg_transport_poll {
                         uint64_t        ep_handle;
                         uint32_t        timeout_ms;
diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h
index 457588e1119b..8cb7a31d9961 100644
--- a/include/scsi/scsi_transport_iscsi.h
+++ b/include/scsi/scsi_transport_iscsi.h
@@ -126,7 +126,8 @@ struct iscsi_transport {
                                int *index, int *age);
 
         void (*session_recovery_timedout) (struct iscsi_cls_session *session);
-        struct iscsi_endpoint *(*ep_connect) (struct sockaddr *dst_addr,
+        struct iscsi_endpoint *(*ep_connect) (struct Scsi_Host *shost,
+                                              struct sockaddr *dst_addr,
                                               int non_blocking);
         int (*ep_poll) (struct iscsi_endpoint *ep, int timeout_ms);
         void (*ep_disconnect) (struct iscsi_endpoint *ep);