[SCSI] iscsi: rm kernel iscsi handles usage for session and connection

from hare@suse.de and michaelc@cs.wisc.edu

hw iscsi like qla4xxx does not allocate a host per session and
for userspace it is difficult to restart iscsid using the
"iscsi handles" for the session and connection, so this
patch just has the class or userspace allocate the id for
the session and connection.

Note: this breaks userspace and requires users to upgrade to the newest
open-iscsi tools. Sorry about his but open-iscsi is still too new to
say we have a stable user-kernel api and we were not good nough
designers to know that other hw iscsi drivers and iscsid itself would
need such changes. Actually we sorta did but at the time we did not
have the HW available to us so we could only guess.

Luckily, the only tools hooking into the class are the open-iscsi ones
or other tools like iscsitart hook into the open-iscsi engine from
userspace or prgroams like anaconda call our tools so they are not affected.

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

1 files changed, 6 insertions, 1 deletions

diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h
index b41cf077e54b..631463cd4892 100644
--- a/include/scsi/scsi_transport_iscsi.h
+++ b/include/scsi/scsi_transport_iscsi.h
@@ -60,11 +60,13 @@ struct iscsi_transport {
 	int ihostdata_size;
 	/* LLD connection data size */
 	int conndata_size;
+	/* LLD session data size */
+	int sessiondata_size;
 	int max_lun;
 	unsigned int max_conn;
 	unsigned int max_cmd_len;
 	struct iscsi_cls_session *(*create_session)
-		(struct scsi_transport_template *t, uint32_t sn, uint32_t *sid);
+		(struct scsi_transport_template *t, uint32_t sn, uint32_t *hn);
 	void (*destroy_session) (struct iscsi_cls_session *session);
 	struct iscsi_cls_conn *(*create_conn) (struct iscsi_cls_session *sess,
 				uint32_t cid);
@@ -104,6 +106,7 @@ struct iscsi_cls_conn {
 	struct list_head conn_list;	/* item in connlist */
 	void *dd_data;			/* LLD private data */
 	struct iscsi_transport *transport;
+	uint32_t cid;			/* connection id */
 	int active;			/* must be accessed with the connlock */
 	struct device dev;		/* sysfs transport/container device */
 	struct mempool_zone *z_error;
@@ -117,6 +120,8 @@ struct iscsi_cls_conn {
 struct iscsi_cls_session {
 	struct list_head sess_list;		/* item in session_list */
 	struct iscsi_transport *transport;
+	int sid;				/* session id */
+	void *dd_data;				/* LLD private data */
 	struct device dev;	/* sysfs transport/container device */
 };