[RFC PATCH 11/18] iser, be2iscsi, qla4xxx: set scsi_host_template cmd_size

[Mike Christie <michael.christie@xxxxxxxxxx>]

Use scsi_host_template cmd_size so the block/scsi-ml layers allocate
the iscsi structs for the driver. This patch includes the easy drivers
that just needed to set the size and a helper to init the iscsi task.

Signed-off-by: Mike Christie <michael.christie@xxxxxxxxxx>
---
 drivers/infiniband/ulp/iser/iscsi_iser.c |  3 +++
 drivers/scsi/be2iscsi/be_main.c          |  2 ++
 drivers/scsi/libiscsi.c                  | 17 +++++++++++++++++
 drivers/scsi/qla4xxx/ql4_os.c            |  3 +++
 include/scsi/libiscsi.h                  |  1 +
 5 files changed, 26 insertions(+)

diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.c b/drivers/infiniband/ulp/iser/iscsi_iser.c
index 3690e28..96f44eb 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.c
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.c
@@ -976,6 +976,9 @@ static umode_t iser_attr_is_visible(int param_type, int param)
 	.proc_name              = "iscsi_iser",
 	.this_id                = -1,
 	.track_queue_depth	= 1,
+	.cmd_size		= sizeof(struct iscsi_iser_task) +
+				  sizeof(struct iscsi_task),
+	.init_cmd_priv		= iscsi_init_cmd_priv,
 };
 
 static struct iscsi_transport iscsi_iser_transport = {
diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c
index cd3189b..91bc822 100644
--- a/drivers/scsi/be2iscsi/be_main.c
+++ b/drivers/scsi/be2iscsi/be_main.c
@@ -401,6 +401,8 @@ static int beiscsi_eh_device_reset(struct scsi_cmnd *sc)
 	.cmd_per_lun = BEISCSI_CMD_PER_LUN,
 	.vendor_id = SCSI_NL_VID_TYPE_PCI | BE_VENDOR_ID,
 	.track_queue_depth = 1,
+	.cmd_size = sizeof(struct beiscsi_io_task) + sizeof(struct iscsi_task),
+	.init_cmd_priv = iscsi_init_cmd_priv,
 };
 
 static struct scsi_transport_template *beiscsi_scsi_transport;
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index 39d7d81..462a308 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -2838,6 +2838,23 @@ static void iscsi_host_dec_session_cnt(struct Scsi_Host *shost)
 	scsi_host_put(shost);
 }
 
+static void iscsi_init_task(struct iscsi_task *task)
+{
+	task->dd_data = &task[1];
+	task->itt = ISCSI_RESERVED_TAG;
+	task->state = ISCSI_TASK_FREE;
+	INIT_LIST_HEAD(&task->running);
+}
+
+int iscsi_init_cmd_priv(struct Scsi_Host *shost, struct scsi_cmnd *sc)
+{
+	struct iscsi_task *task = scsi_cmd_priv(sc);
+
+	iscsi_init_task(task);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(iscsi_init_cmd_priv);
+
 /**
  * iscsi_session_setup - create iscsi cls session and host and session
  * @iscsit: iscsi transport template
diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c
index 6996942..c20b7c3 100644
--- a/drivers/scsi/qla4xxx/ql4_os.c
+++ b/drivers/scsi/qla4xxx/ql4_os.c
@@ -239,6 +239,9 @@ static int qla4xxx_sysfs_ddb_logout(struct iscsi_bus_flash_session *fnode_sess,
 	.this_id		= -1,
 	.cmd_per_lun		= 3,
 	.sg_tablesize		= SG_ALL,
+	.cmd_size		= sizeof(struct ql4_task_data) +
+				  sizeof(struct iscsi_task),
+	.init_cmd_priv		= iscsi_init_cmd_priv,
 
 	.max_sectors		= 0xFFFF,
 	.shost_attrs		= qla4xxx_host_attrs,
diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h
index e4dd975..406e8a2 100644
--- a/include/scsi/libiscsi.h
+++ b/include/scsi/libiscsi.h
@@ -460,6 +460,7 @@ extern int __iscsi_complete_pdu(struct iscsi_conn *, struct iscsi_hdr *,
 extern void __iscsi_get_task(struct iscsi_task *task);
 extern void iscsi_complete_scsi_task(struct iscsi_task *task,
 				     uint32_t exp_cmdsn, uint32_t max_cmdsn);
+extern int iscsi_init_cmd_priv(struct Scsi_Host *shost, struct scsi_cmnd *cmd);
 
 /*
  * generic helpers
-- 
1.8.3.1