[RFC PATCH 18/19] Target_Core_Mod Generic Transport Core

[Nicholas A. Bellinger]

The patch adds the core generic target engine functionality including processing of
se_cmd_t, generation of se_task_ts, control patch CDB emulation, sense data, memory allocation,
and memory mapping from fabric module allocated memory using linked list struct scatterlist
style memory based on underlying storage object hardware.

Signed-off-by: Nicholas A. Bellinger <nab@xxxxxxxxxxxxxxx>

diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
new file mode 100644
index 0000000..134d5a0
--- /dev/null
+++ b/drivers/target/target_core_transport.c
@@ -0,0 +1,7537 @@
+/*******************************************************************************
+ * Filename:  target_core_transport.c
+ *
+ * This file contains the Generic Target Layer Core.
+ *
+ * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc.
+ * Copyright (c) 2005, 2006, 2007 SBE, Inc.
+ * Copyright (c) 2007-2009 Rising Tide Software, Inc.
+ * Copyright (c) 2008-2009 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@xxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+
+#define TARGET_CORE_TRANSPORT_C
+
+#include <linux/version.h>
+#include <linux/net.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/slab.h>
+#include <linux/blkdev.h>
+#include <linux/spinlock.h>
+#include <linux/smp_lock.h>
+#include <linux/kthread.h>
+#include <linux/in.h>
+#include <linux/cdrom.h>
+#include <net/sock.h>
+#include <net/tcp.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_device.h>
+#include <target/target_core_hba.h>
+#include <target/target_core_scdb.h>
+#include <target/target_core_pr.h>
+#include <target/target_core_alua.h>
+#include <target/target_core_tmr.h>
+#include <target/target_core_ua.h>
+#include <target/target_core_transport.h>
+#include <target/target_core_plugin.h>
+#include <target/target_core_seobj.h>
+#include <target/target_core_transport_plugin.h>
+#include <target/target_core_fabric_ops.h>
+#include <target/target_core_configfs.h>
+
+#undef TARGET_CORE_TRANSPORT_C
+
+/* #define DEBUG_CDB_HANDLER */
+#ifdef DEBUG_CDB_HANDLER
+#define DEBUG_CDB_H(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_CDB_H(x...)
+#endif
+
+/* #define DEBUG_CMD_MAP */
+#ifdef DEBUG_CMD_MAP
+#define DEBUG_CMD_M(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_CMD_M(x...)
+#endif
+
+/* #define DEBUG_MEM_ALLOC */
+#ifdef DEBUG_MEM_ALLOC
+#define DEBUG_MEM(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_MEM(x...)
+#endif
+
+/* #define DEBUG_MEM2_ALLOC */
+#ifdef DEBUG_MEM2_ALLOC
+#define DEBUG_MEM2(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_MEM2(x...)
+#endif
+
+/* #define DEBUG_SG_CALC */
+#ifdef DEBUG_SG_CALC
+#define DEBUG_SC(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_SC(x...)
+#endif
+
+/* #define DEBUG_SE_OBJ */
+#ifdef DEBUG_SE_OBJ
+#define DEBUG_SO(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_SO(x...)
+#endif
+
+/* #define DEBUG_CMD_VOL */
+#ifdef DEBUG_CMD_VOL
+#define DEBUG_VOL(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_VOL(x...)
+#endif
+
+/* #define DEBUG_CMD_STOP */
+#ifdef DEBUG_CMD_STOP
+#define DEBUG_CS(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_CS(x...)
+#endif
+
+/* #define DEBUG_PASSTHROUGH */
+#ifdef DEBUG_PASSTHROUGH
+#define DEBUG_PT(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_PT(x...)
+#endif
+
+/* #define DEBUG_TASK_STOP */
+#ifdef DEBUG_TASK_STOP
+#define DEBUG_TS(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_TS(x...)
+#endif
+
+/* #define DEBUG_TRANSPORT_STOP */
+#ifdef DEBUG_TRANSPORT_STOP
+#define DEBUG_TRANSPORT_S(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_TRANSPORT_S(x...)
+#endif
+
+/* #define DEBUG_TASK_FAILURE */
+#ifdef DEBUG_TASK_FAILURE
+#define DEBUG_TF(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_TF(x...)
+#endif
+
+/* #define DEBUG_DEV_OFFLINE */
+#ifdef DEBUG_DEV_OFFLINE
+#define DEBUG_DO(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_DO(x...)
+#endif
+
+/* #define DEBUG_TASK_STATE */
+#ifdef DEBUG_TASK_STATE
+#define DEBUG_TSTATE(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_TSTATE(x...)
+#endif
+
+/* #define DEBUG_STATUS_THR */
+#ifdef DEBUG_STATUS_THR
+#define DEBUG_ST(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_ST(x...)
+#endif
+
+/* #define DEBUG_TASK_TIMEOUT */
+#ifdef DEBUG_TASK_TIMEOUT
+#define DEBUG_TT(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_TT(x...)
+#endif
+
+/* #define DEBUG_GENERIC_REQUEST_FAILURE */
+#ifdef DEBUG_GENERIC_REQUEST_FAILURE
+#define DEBUG_GRF(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_GRF(x...)
+#endif
+
+se_global_t *se_global;
+EXPORT_SYMBOL(se_global);
+
+struct kmem_cache *se_cmd_cache;
+struct kmem_cache *se_task_cache;
+struct kmem_cache *se_tmr_req_cache;
+struct kmem_cache *se_sess_cache;
+struct kmem_cache *se_ua_cache;
+struct kmem_cache *t10_pr_reg_cache;
+struct kmem_cache *t10_alua_lu_gp_cache;
+struct kmem_cache *t10_alua_lu_gp_mem_cache;
+struct kmem_cache *t10_alua_tg_pt_gp_cache;
+struct kmem_cache *t10_alua_tg_pt_gp_mem_cache;
+
+static int transport_generic_write_pending(se_cmd_t *);
+static int transport_processing_thread(void *);
+
+static char *transport_passthrough_get_fabric_name(void)
+{
+	return "PT";
+}
+
+static u32 transport_passthrough_get_task_tag(se_cmd_t *cmd)
+{
+	return 0;
+}
+
+static int transport_passthrough_get_cmd_state(se_cmd_t *cmd)
+{
+	return 0;
+}
+
+static void transport_passthrough_release_cmd_direct(se_cmd_t *cmd)
+{
+	return;
+}
+
+static u16 transport_passthrough_set_fabric_sense_len(
+	se_cmd_t *cmd,
+	u32 sense_len)
+{
+	return 0;
+}
+
+static u16 transport_passthrough_get_fabric_sense_len(void)
+{
+	return 0;
+}
+
+struct target_core_fabric_ops passthrough_fabric_ops = {
+	.release_cmd_direct	= transport_passthrough_release_cmd_direct,
+	.get_fabric_name	= transport_passthrough_get_fabric_name,
+	.get_task_tag		= transport_passthrough_get_task_tag,
+	.get_cmd_state		= transport_passthrough_get_cmd_state,
+	.set_fabric_sense_len	= transport_passthrough_set_fabric_sense_len,
+	.get_fabric_sense_len	= transport_passthrough_get_fabric_sense_len,
+};
+
+int init_se_global(void)
+{
+	se_global_t *global;
+	se_hba_t *hba;
+	int i;
+
+	global = kzalloc(sizeof(se_global_t), GFP_KERNEL);
+	if (!(global)) {
+		printk(KERN_ERR "Unable to allocate memory for se_global_t\n");
+		return -1;
+	}
+
+	INIT_LIST_HEAD(&global->g_lu_gps_list);
+	INIT_LIST_HEAD(&global->g_tg_pt_gps_list);
+	INIT_LIST_HEAD(&global->g_se_tpg_list);
+	spin_lock_init(&global->hba_lock);
+	spin_lock_init(&global->se_tpg_lock);
+	spin_lock_init(&global->lu_gps_lock);
+	spin_lock_init(&global->tg_pt_gps_lock);
+	spin_lock_init(&global->plugin_class_lock);
+
+	se_cmd_cache = kmem_cache_create("se_cmd_cache",
+			sizeof(se_cmd_t), __alignof__(se_cmd_t), 0, NULL);
+	if (!(se_cmd_cache)) {
+		printk(KERN_ERR "kmem_cache_create for se_cmd_t failed\n");
+		goto out;
+	}
+	se_task_cache = kmem_cache_create("se_task_cache",
+			sizeof(se_task_t), __alignof__(se_task_t), 0, NULL);
+	if (!(se_task_cache)) {
+		printk(KERN_ERR "kmem_cache_create for se_task_t failed\n");
+		goto out;
+	}
+	se_tmr_req_cache = kmem_cache_create("se_tmr_cache",
+			sizeof(se_tmr_req_t), __alignof__(se_tmr_req_t),
+			0, NULL);
+	if (!(se_tmr_req_cache)) {
+		printk(KERN_ERR "kmem_cache_create() for se_tmr_req_t"
+				" failed\n");
+		goto out;
+	}
+	se_sess_cache = kmem_cache_create("se_sess_cache",
+			sizeof(se_session_t), __alignof__(se_session_t),
+			0, NULL);
+	if (!(se_sess_cache)) {
+		printk(KERN_ERR "kmem_cache_create() for se_session_t"
+				" failed\n");
+		goto out;
+	}
+	se_ua_cache = kmem_cache_create("se_ua_cache",
+			sizeof(se_ua_t), __alignof__(se_ua_t), 0, NULL);
+	if (!(se_ua_cache)) {
+		printk(KERN_ERR "kmem_cache_create() for se_ua_t failed\n");
+		goto out;
+	}
+	t10_pr_reg_cache = kmem_cache_create("t10_pr_reg_cache",
+			sizeof(t10_pr_registration_t),
+			__alignof__(t10_pr_registration_t), 0, NULL);
+	if (!(t10_pr_reg_cache)) {
+		printk(KERN_ERR "kmem_cache_create() for t10_pr_registration_t"
+				" failed\n");
+		goto out;
+	}
+	t10_alua_lu_gp_cache = kmem_cache_create("t10_alua_lu_gp_cache",
+			sizeof(t10_alua_lu_gp_t), __alignof__(t10_alua_lu_gp_t),
+			0, NULL);
+	if (!(t10_alua_lu_gp_cache)) {
+		printk(KERN_ERR "kmem_cache_create() for t10_alua_lu_gp_cache"
+				" failed\n");
+		goto out;
+	}
+	t10_alua_lu_gp_mem_cache = kmem_cache_create("t10_alua_lu_gp_mem_cache",
+			sizeof(t10_alua_lu_gp_member_t),
+			__alignof__(t10_alua_lu_gp_member_t), 0, NULL);
+	if (!(t10_alua_lu_gp_mem_cache)) {
+		printk(KERN_ERR "kmem_cache_create() for t10_alua_lu_gp_mem_"
+				"cache failed\n");
+		goto out;
+	}
+	t10_alua_tg_pt_gp_cache = kmem_cache_create("t10_alua_tg_pt_gp_cache",
+			sizeof(t10_alua_tg_pt_gp_t),
+			__alignof__(t10_alua_tg_pt_gp_t), 0, NULL);
+	if (!(t10_alua_tg_pt_gp_cache)) {
+		printk(KERN_ERR "kmem_cache_create() for t10_alua_tg_pt_gp_"
+				"cache failed\n");
+		goto out;
+	}
+	t10_alua_tg_pt_gp_mem_cache = kmem_cache_create(
+			"t10_alua_tg_pt_gp_mem_cache",
+			sizeof(t10_alua_tg_pt_gp_member_t),
+			__alignof__(t10_alua_tg_pt_gp_member_t),
+			0, NULL);
+	if (!(t10_alua_tg_pt_gp_mem_cache)) {
+		printk(KERN_ERR "kmem_cache_create() for t10_alua_tg_pt_gp_"
+				"mem_t failed\n");
+		goto out;
+	}
+
+	global->hba_list = kzalloc((sizeof(se_hba_t) *
+				TRANSPORT_MAX_GLOBAL_HBAS), GFP_KERNEL);
+	if (!(global->hba_list)) {
+		printk(KERN_ERR "Unable to allocate global->hba_list\n");
+		goto out;
+	}
+
+	for (i = 0; i < TRANSPORT_MAX_GLOBAL_HBAS; i++) {
+		hba = &global->hba_list[i];
+
+		hba->hba_status |= HBA_STATUS_FREE;
+		hba->hba_id = i;
+		INIT_LIST_HEAD(&hba->hba_dev_list);
+		spin_lock_init(&hba->device_lock);
+		spin_lock_init(&hba->hba_queue_lock);
+		init_MUTEX(&hba->hba_access_sem);
+#ifdef SNMP_SUPPORT
+		hba->hba_index = scsi_get_new_index(SCSI_INST_INDEX);
+#endif
+	}
+
+	global->plugin_class_list = kzalloc((sizeof(se_plugin_class_t) *
+				MAX_PLUGIN_CLASSES), GFP_KERNEL);
+	if (!(global->plugin_class_list)) {
+		printk(KERN_ERR "Unable to allocate global->"
+			"plugin_class_list\n");
+		goto out;
+	}
+
+	se_global = global;
+
+	return 0;
+out:
+	kfree(global->hba_list);
+	kfree(global->plugin_class_list);
+	if (se_cmd_cache)
+		kmem_cache_destroy(se_cmd_cache);
+	if (se_task_cache)
+		kmem_cache_destroy(se_task_cache);
+	if (se_tmr_req_cache)
+		kmem_cache_destroy(se_tmr_req_cache);
+	if (se_sess_cache)
+		kmem_cache_destroy(se_sess_cache);
+	if (se_ua_cache)
+		kmem_cache_destroy(se_ua_cache);
+	if (t10_pr_reg_cache)
+		kmem_cache_destroy(t10_pr_reg_cache);
+	if (t10_alua_lu_gp_cache)
+		kmem_cache_destroy(t10_alua_lu_gp_cache);
+	if (t10_alua_lu_gp_mem_cache)
+		kmem_cache_destroy(t10_alua_lu_gp_mem_cache);
+	if (t10_alua_tg_pt_gp_cache)
+		kmem_cache_destroy(t10_alua_tg_pt_gp_cache);
+	if (t10_alua_tg_pt_gp_mem_cache)
+		kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache);
+	kfree(global);
+	return -1;
+}
+
+void release_se_global(void)
+{
+	se_global_t *global;
+
+	global = se_global;
+	if (!(global))
+		return;
+
+	kfree(global->plugin_class_list);
+	kfree(global->hba_list);
+	kmem_cache_destroy(se_cmd_cache);
+	kmem_cache_destroy(se_task_cache);
+	kmem_cache_destroy(se_tmr_req_cache);
+	kmem_cache_destroy(se_sess_cache);
+	kmem_cache_destroy(se_ua_cache);
+	kmem_cache_destroy(t10_pr_reg_cache);
+	kmem_cache_destroy(t10_alua_lu_gp_cache);
+	kmem_cache_destroy(t10_alua_lu_gp_mem_cache);
+	kmem_cache_destroy(t10_alua_tg_pt_gp_cache);
+	kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache);
+	kfree(global);
+
+	se_global = NULL;
+}
+
+#ifdef DEBUG_DEV
+
+/* warning FIXME: PLUGIN API TODO */
+int __iscsi_debug_dev(se_device_t *dev)
+{
+	int fail_task = 0;
+	fd_dev_t *fd_dev;
+	iblock_dev_t *ib_dev;
+	rd_dev_t *rd_dev;
+	struct scsi_device *sd;
+
+	spin_lock(&se_global->debug_dev_lock);
+	switch (dev->se_hba->type) {
+	case PSCSI:
+		sd = (struct scsi_device *) dev->dev_ptr;
+		if (dev->dev_flags & DF_DEV_DEBUG) {
+			printk(KERN_INFO "HBA[%u] - Failing PSCSI Task for"
+				" %d/%d/%d\n", dev->se_hba->hba_id,
+				sd->channel, sd->id, sd->lun);
+			fail_task = 1;
+		}
+		break;
+	case IBLOCK:
+		ib_dev = (iblock_dev_t *) dev->dev_ptr;
+		if (dev->dev_flags & DF_DEV_DEBUG) {
+			printk(KERN_INFO "HBA[%u] - Failing IBLOCK Task for"
+				" %u/%u\n", dev->se_hba->hba_id,
+				ib_dev->ibd_major, ib_dev->ibd_minor);
+			fail_task = 1;
+		}
+		break;
+	case FILEIO:
+		fd_dev = (fd_dev_t *) dev->dev_ptr;
+		if (dev->dev_flags & DF_DEV_DEBUG) {
+			printk(KERN_INFO "HBA[%u] - Failing FILEIO Task for"
+				" %u\n", dev->se_hba->hba_id,
+				fd_dev->fd_dev_id);
+			fail_task = 1;
+		}
+		break;
+	case RAMDISK_DR:
+	case RAMDISK_MCP:
+		rd_dev = (rd_dev_t *) dev->dev_ptr;
+		if (dev->dev_flags & DF_DEV_DEBUG) {
+			printk(KERN_INFO "HBA[%u] - Failing RAMDISK Task for"
+				" %u\n", dev->se_hba->hba_id,
+				rd_dev->rd_dev_id);
+			fail_task = 1;
+		}
+		break;
+	default:
+		if (dev->dev_flags & DF_DEV_DEBUG) {
+			printk(KERN_INFO "HBA[%u] - Failing unknown Task\n",
+				dev->se_hba->hba_id);
+			fail_task = 1;
+		}
+		break;
+	}
+	spin_unlock(&se_global->debug_dev_lock);
+
+	return fail_task;
+}
+
+#endif /* DEBUG_DEV */
+
+/* #warning FIXME: transport_get_iqn_sn() for se_global_t */
+unsigned char *transport_get_iqn_sn(void)
+{
+	/*
+	 * Assume that for production WWN information will come through
+	 * ConfigFS at /sys/kernel/config/target/core/$HBA/$DEV/vpd_unit_serial
+	 */
+	return "1234567890";
+}
+
+void transport_init_queue_obj(se_queue_obj_t *qobj)
+{
+	atomic_set(&qobj->queue_cnt, 0);
+	INIT_LIST_HEAD(&qobj->qobj_list);
+	init_waitqueue_head(&qobj->thread_wq);
+	init_MUTEX_LOCKED(&qobj->thread_create_sem);
+	init_MUTEX_LOCKED(&qobj->thread_done_sem);
+	spin_lock_init(&qobj->cmd_queue_lock);
+}
+
+void transport_load_plugins(void)
+{
+	int ret = 0;
+
+#ifdef PARALLEL_SCSI
+	plugin_register((void *)&pscsi_template, pscsi_template.type,
+			pscsi_template.name, PLUGIN_TYPE_TRANSPORT,
+			pscsi_template.get_plugin_info, &ret);
+#endif
+#ifdef PYX_IBLOCK
+	plugin_register((void *)&iblock_template, iblock_template.type,
+			iblock_template.name, PLUGIN_TYPE_TRANSPORT,
+			iblock_template.get_plugin_info, &ret);
+#endif
+#ifdef PYX_RAMDISK
+	plugin_register((void *)&rd_dr_template, rd_dr_template.type,
+			rd_dr_template.name, PLUGIN_TYPE_TRANSPORT,
+			rd_dr_template.get_plugin_info, &ret);
+	plugin_register((void *)&rd_mcp_template, rd_mcp_template.type,
+			rd_mcp_template.name, PLUGIN_TYPE_TRANSPORT,
+			rd_mcp_template.get_plugin_info, &ret);
+#endif
+#ifdef PYX_FILEIO
+	plugin_register((void *)&fileio_template, fileio_template.type,
+			fileio_template.name, PLUGIN_TYPE_TRANSPORT,
+			fileio_template.get_plugin_info, &ret);
+#endif
+}
+
+se_plugin_t *transport_core_get_plugin_by_name(const char *name)
+{
+	se_plugin_class_t *pc;
+	se_plugin_t *p;
+	int i;
+
+	pc = plugin_get_class(PLUGIN_TYPE_TRANSPORT);
+	if (!(pc))
+		return NULL;
+
+	for (i = 0; i < MAX_PLUGINS; i++) {
+		p = &pc->plugin_array[i];
+
+		if (!p->plugin_obj)
+			continue;
+
+		if (!(strncmp(name, p->plugin_name, strlen(p->plugin_name))))
+			return p;
+	}
+
+	return NULL;
+}
+
+void transport_check_dev_params_delim(char *ptr, char **cur)
+{
+	char *ptr2;
+
+	if (ptr) {
+		ptr2 = strstr(ptr, ",");
+		if ((ptr2)) {
+			*ptr2 = '\0';
+			*cur = (ptr2 + 1); /* Skip over comma */
+		} else
+			*cur = NULL;
+	}
+}
+
+se_session_t *transport_init_session(void)
+{
+	se_session_t *se_sess;
+
+	se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL);
+	if (!(se_sess)) {
+		printk(KERN_ERR "Unable to allocate se_session_t from"
+				" se_sess_cache\n");
+		return ERR_PTR(-ENOMEM);
+	}
+	INIT_LIST_HEAD(&se_sess->sess_list);
+
+	return se_sess;
+}
+EXPORT_SYMBOL(transport_init_session);
+
+/*
+ * Called with spin_lock_bh(&se_portal_group_t->session_lock called.
+ */
+void __transport_register_session(
+	se_portal_group_t *se_tpg,
+	se_node_acl_t *se_nacl,
+	se_session_t *se_sess,
+	void *fabric_sess_ptr)
+{
+	se_sess->se_tpg = se_tpg;
+	se_sess->fabric_sess_ptr = fabric_sess_ptr;
+	/*
+	 * Used by se_node_acl_t's under ConfigFS to locate active se_session-t
+	 *
+	 * Only set for se_session_t's that will actually be moving I/O.
+	 * eg: *NOT* discovery sessions.
+	 */
+	if (se_nacl) {
+		spin_lock_bh(&se_nacl->nacl_sess_lock);
+		se_nacl->nacl_sess = se_sess;
+		spin_unlock_bh(&se_nacl->nacl_sess_lock);
+	}
+	list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list);
+
+	printk(KERN_INFO "TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n",
+		TPG_TFO(se_tpg)->get_fabric_name(), se_sess->fabric_sess_ptr);
+}
+EXPORT_SYMBOL(__transport_register_session);
+
+void transport_register_session(
+	se_portal_group_t *se_tpg,
+	se_node_acl_t *se_nacl,
+	se_session_t *se_sess,
+	void *fabric_sess_ptr)
+{
+	spin_lock_bh(&se_tpg->session_lock);
+	__transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr);
+	spin_unlock_bh(&se_tpg->session_lock);
+}
+EXPORT_SYMBOL(transport_register_session);
+
+void transport_deregister_session_configfs(se_session_t *se_sess)
+{
+	se_node_acl_t *se_nacl;
+
+	/*
+	 * Used by se_node_acl_t's under ConfigFS to locate active se_session_t
+	 */
+	se_nacl = se_sess->se_node_acl;
+	if ((se_nacl)) {
+		spin_lock_bh(&se_nacl->nacl_sess_lock);
+		se_nacl->nacl_sess = NULL;
+		spin_unlock_bh(&se_nacl->nacl_sess_lock);
+	}
+}
+EXPORT_SYMBOL(transport_deregister_session_configfs);
+
+void transport_free_session(se_session_t *se_sess)
+{
+	kmem_cache_free(se_sess_cache, se_sess);
+}
+EXPORT_SYMBOL(transport_free_session);
+
+void transport_deregister_session(se_session_t *se_sess)
+{
+	se_portal_group_t *se_tpg = se_sess->se_tpg;
+	se_node_acl_t *se_nacl;
+
+	if (!(se_tpg)) {
+		transport_free_session(se_sess);
+		return;
+	}
+
+	spin_lock_bh(&se_tpg->session_lock);
+	list_del(&se_sess->sess_list);
+	se_sess->se_tpg = NULL;
+	se_sess->fabric_sess_ptr = NULL;
+	spin_unlock_bh(&se_tpg->session_lock);
+
+	/*
+	 * Determine if we need to do extra work for this initiator node's
+	 * se_node_acl_t if it had been previously dynamically generated.
+	 */
+	se_nacl = se_sess->se_node_acl;
+	if ((se_nacl)) {
+		spin_lock_bh(&se_tpg->acl_node_lock);
+		if (se_nacl->nodeacl_flags & NAF_DYNAMIC_NODE_ACL) {
+			if (!(TPG_TFO(se_tpg)->tpg_check_demo_mode_cache(
+					se_tpg))) {
+				list_del(&se_nacl->acl_list);
+				se_tpg->num_node_acls--;
+				spin_unlock_bh(&se_tpg->acl_node_lock);
+				core_free_device_list_for_node(se_nacl, se_tpg);
+				TPG_TFO(se_tpg)->tpg_release_fabric_acl(se_tpg,
+						se_nacl);
+				kfree(se_nacl);
+				spin_lock_bh(&se_tpg->acl_node_lock);
+			}
+		}
+		spin_unlock_bh(&se_tpg->acl_node_lock);
+	}
+
+	transport_free_session(se_sess);
+
+	printk(KERN_INFO "TARGET_CORE[%s]: Deregistered fabric_sess\n",
+		TPG_TFO(se_tpg)->get_fabric_name());
+}
+EXPORT_SYMBOL(transport_deregister_session);
+
+/*
+ * Called with T_TASK(cmd)->t_state_lock held.
+ */
+static void transport_all_task_dev_remove_state(se_cmd_t *cmd)
+{
+	se_device_t *dev;
+	se_task_t *task;
+	unsigned long flags;
+
+	if (!T_TASK(cmd))
+		return;
+
+	list_for_each_entry(task, &T_TASK(cmd)->t_task_list, t_list) {
+		dev = task->se_dev;
+		if (!(dev))
+			continue;
+
+		if (atomic_read(&task->task_active))
+			continue;
+
+		if (!(atomic_read(&task->task_state_active)))
+			continue;
+
+		spin_lock_irqsave(&dev->execute_task_lock, flags);
+		list_del(&task->t_state_list);
+		DEBUG_TSTATE("Removed ITT: 0x%08x dev: %p task[%p]\n",
+			CMD_TFO(cmd)->tfo_get_task_tag(cmd), dev, task);
+		spin_unlock_irqrestore(&dev->execute_task_lock, flags);
+
+		atomic_set(&task->task_state_active, 0);
+		atomic_dec(&T_TASK(cmd)->t_task_cdbs_ex_left);
+	}
+}
+
+/*
+ * Called with T_TASK(cmd)->t_state_lock held.
+ */
+void transport_task_dev_remove_state(se_task_t *task, se_device_t *dev)
+{
+	se_cmd_t *cmd = task->task_se_cmd;
+	unsigned long flags;
+
+	/*
+	 * We cannot remove the task from the state list while said task is
+	 * still active and probably timed out.
+	 */
+	if (atomic_read(&task->task_active)) {
+#if 0
+		printk(KERN_ERR "Skipping Removal of state for ITT: 0x%08x"
+			" dev: %p task[%p]\n"
+			CMD_TFO(task->task_se_cmd)->tfo_get_task_tag(
+			task->task_se_cmd), dev, task);
+#endif
+		return;
+	}
+
+	if (atomic_read(&task->task_state_active)) {
+		spin_lock_irqsave(&dev->execute_task_lock, flags);
+		list_del(&task->t_state_list);
+		DEBUG_TSTATE("Removed ITT: 0x%08x dev: %p task[%p]\n",
+			CMD_TFO(task->task_se_cmd)->tfo_get_task_tag(
+			task->task_se_cmd), dev, task);
+		spin_unlock_irqrestore(&dev->execute_task_lock, flags);
+
+		atomic_set(&task->task_state_active, 0);
+		atomic_dec(&T_TASK(cmd)->t_task_cdbs_ex_left);
+	}
+}
+
+static void transport_passthrough_check_stop(se_cmd_t *cmd)
+{
+	if (!(cmd->se_cmd_flags & SCF_CMD_PASSTHROUGH))
+		return;
+
+	if (!cmd->transport_passthrough_done) {
+		if (cmd->callback) {
+			cmd->callback(cmd, cmd->callback_arg,
+				transport_passthrough_complete(cmd));
+		} else
+			up(&T_TASK(cmd)->t_transport_passthrough_sem);
+
+		return;
+	}
+
+	cmd->transport_passthrough_done(cmd);
+}
+
+/*	transport_cmd_check_stop():
+ *
+ *	'transport_off = 1' determines if t_transport_active should be cleared.
+ *	'transport_off = 2' determines if task_dev_state should be removed.
+ *
+ *	A non-zero u8 t_state sets cmd->t_state.
+ *	Returns 1 when command is stopped, else 0.
+ */
+static int transport_cmd_check_stop(
+	se_cmd_t *cmd,
+	int transport_off,
+	u8 t_state)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+	/*
+	 * Determine if IOCTL context caller in requesting the stopping of this
+	 * command for LUN shutdown purposes.
+	 */
+	if (atomic_read(&T_TASK(cmd)->transport_lun_stop)) {
+		DEBUG_CS("%s:%d atomic_read(&T_TASK(cmd)->transport_lun_stop)"
+			" == TRUE for ITT: 0x%08x\n", __func__, __LINE__,
+			CMD_TFO(cmd)->get_task_tag(cmd));
+
+		cmd->deferred_t_state = cmd->t_state;
+		cmd->t_state = TRANSPORT_DEFERRED_CMD;
+		atomic_set(&T_TASK(cmd)->t_transport_active, 0);
+		if (transport_off == 2)
+			transport_all_task_dev_remove_state(cmd);
+		spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+		up(&T_TASK(cmd)->transport_lun_stop_sem);
+		return 1;
+	}
+	/*
+	 * Determine if frontend context caller is requesting the stopping of
+	 * this command for frontend excpections.
+	 */
+	if (atomic_read(&T_TASK(cmd)->t_transport_stop)) {
+		DEBUG_CS("%s:%d atomic_read(&T_TASK(cmd)->t_transport_stop) =="
+			" TRUE for ITT: 0x%08x\n", __func__, __LINE__,
+			CMD_TFO(cmd)->get_task_tag(cmd));
+
+		cmd->deferred_t_state = cmd->t_state;
+		cmd->t_state = TRANSPORT_DEFERRED_CMD;
+		if (transport_off == 2)
+			transport_all_task_dev_remove_state(cmd);
+
+		/*
+		 * Clear se_cmd_t->se_lun before the transport_off == 2 handoff
+		 * to FE.
+		 */
+		if ((transport_off == 2) && !(cmd->se_cmd_flags &
+						SCF_CMD_PASSTHROUGH))
+			cmd->se_lun = NULL;
+		spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+		up(&T_TASK(cmd)->t_transport_stop_sem);
+		return 1;
+	}
+	if (transport_off) {
+		atomic_set(&T_TASK(cmd)->t_transport_active, 0);
+		if (transport_off == 2)
+			transport_all_task_dev_remove_state(cmd);
+
+		/*
+		 * Clear se_cmd_t->se_lun before the transport_off == 2 handoff
+		 * to FE.
+		 */
+		if ((transport_off == 2) && !(cmd->se_cmd_flags &
+						SCF_CMD_PASSTHROUGH))
+			cmd->se_lun = NULL;
+		spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+		return 0;
+	} else if (t_state)
+		cmd->t_state = t_state;
+	spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+	return 0;
+}
+
+static void transport_lun_remove_cmd(se_cmd_t *cmd)
+{
+	se_lun_t *lun = SE_LUN(cmd);
+	unsigned long flags;
+
+	if (!lun)
+		return;
+	/*
+	 * Do not track passthrough se_cmd_t for now..
+	 */
+	if (cmd->se_cmd_flags & SCF_CMD_PASSTHROUGH)
+		return;
+
+	spin_lock_irqsave(&lun->lun_cmd_lock, flags);
+	if (atomic_read(&T_TASK(cmd)->transport_lun_active)) {
+		list_del(&cmd->se_lun_list);
+		atomic_set(&T_TASK(cmd)->transport_lun_active, 0);
+#if 0
+		printk(KERN_INFO "Removed ITT: 0x%08x from LUN LIST[%d]\n"
+			CMD_TFO(cmd)->get_task_tag(cmd), lun->unpacked_lun);
+#endif
+	}
+	spin_unlock_irqrestore(&lun->lun_cmd_lock, flags);
+}
+
+void transport_cmd_finish_abort(se_cmd_t *cmd, int remove)
+{
+	transport_remove_cmd_from_queue(cmd,
+		CMD_ORIG_OBJ_API(cmd)->get_queue_obj(
+			cmd->se_orig_obj_ptr));
+
+	transport_lun_remove_cmd(cmd);
+
+	if (!(transport_cmd_check_stop(cmd, 1, 0))) {
+		transport_passthrough_check_stop(cmd);
+		return;
+	}
+	if (remove)
+		transport_generic_remove(cmd, 0, 0);
+}
+
+void transport_cmd_finish_abort_tmr(se_cmd_t *cmd)
+{
+	transport_remove_cmd_from_queue(cmd,
+			CMD_ORIG_OBJ_API(cmd)->get_queue_obj(
+			cmd->se_orig_obj_ptr));
+
+	if (!(transport_cmd_check_stop(cmd, 1, 0))) {
+		transport_passthrough_check_stop(cmd);
+		return;
+	}
+	transport_generic_remove(cmd, 0, 0);
+}
+
+int transport_add_cmd_to_queue(
+	se_cmd_t *cmd,
+	se_queue_obj_t *qobj,
+	u8 t_state)
+{
+	se_queue_req_t *qr;
+	unsigned long flags;
+
+	qr = kzalloc(sizeof(se_queue_req_t), GFP_ATOMIC);
+	if (!(qr)) {
+		printk(KERN_ERR "Unable to allocate memory for"
+				" se_queue_req_t\n");
+		return -1;
+	}
+	INIT_LIST_HEAD(&qr->qr_list);
+
+	qr->cmd = (void *)cmd;
+	qr->state = t_state;
+
+	if (t_state) {
+		spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+		cmd->t_state = t_state;
+		atomic_set(&T_TASK(cmd)->t_transport_active, 1);
+		spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+	}
+
+	spin_lock_irqsave(&qobj->cmd_queue_lock, flags);
+	list_add_tail(&qr->qr_list, &qobj->qobj_list);
+	atomic_inc(&T_TASK(cmd)->t_transport_queue_active);
+	spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
+
+	atomic_inc(&qobj->queue_cnt);
+	wake_up_interruptible(&qobj->thread_wq);
+	return 0;
+}
+
+static int transport_add_cmd_to_dev_queue(se_cmd_t *cmd, u8 t_state)
+{
+	se_device_t *dev = cmd->se_dev;
+
+	return transport_add_cmd_to_queue(cmd, dev->dev_queue_obj, t_state);
+}
+
+/*
+ * Called with se_queue_obj_t->cmd_queue_lock held.
+ */
+se_queue_req_t *__transport_get_qr_from_queue(se_queue_obj_t *qobj)
+{
+	se_cmd_t *cmd;
+	se_queue_req_t *qr = NULL;
+
+	if (list_empty(&qobj->qobj_list))
+		return NULL;
+
+	list_for_each_entry(qr, &qobj->qobj_list, qr_list)
+		break;
+
+	if (qr->cmd) {
+		cmd = (se_cmd_t *)qr->cmd;
+		atomic_dec(&T_TASK(cmd)->t_transport_queue_active);
+	}
+	list_del(&qr->qr_list);
+	atomic_dec(&qobj->queue_cnt);
+
+	return qr;
+}
+
+se_queue_req_t *transport_get_qr_from_queue(se_queue_obj_t *qobj)
+{
+	se_cmd_t *cmd;
+	se_queue_req_t *qr;
+	unsigned long flags;
+
+	spin_lock_irqsave(&qobj->cmd_queue_lock, flags);
+	if (list_empty(&qobj->qobj_list)) {
+		spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
+		return NULL;
+	}
+
+	list_for_each_entry(qr, &qobj->qobj_list, qr_list)
+		break;
+
+	if (qr->cmd) {
+		cmd = (se_cmd_t *)qr->cmd;
+		atomic_dec(&T_TASK(cmd)->t_transport_queue_active);
+	}
+	list_del(&qr->qr_list);
+	atomic_dec(&qobj->queue_cnt);
+	spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
+
+	return qr;
+}
+
+void transport_remove_cmd_from_queue(se_cmd_t *cmd, se_queue_obj_t *qobj)
+{
+	se_cmd_t *q_cmd;
+	se_queue_req_t *qr = NULL, *qr_p = NULL;
+	unsigned long flags;
+
+	spin_lock_irqsave(&qobj->cmd_queue_lock, flags);
+	if (!(atomic_read(&T_TASK(cmd)->t_transport_queue_active))) {
+		spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
+		return;
+	}
+
+	list_for_each_entry_safe(qr, qr_p, &qobj->qobj_list, qr_list) {
+		q_cmd = (se_cmd_t *)qr->cmd;
+		if (q_cmd != cmd)
+			continue;
+
+		atomic_dec(&T_TASK(q_cmd)->t_transport_queue_active);
+		atomic_dec(&qobj->queue_cnt);
+		list_del(&qr->qr_list);
+		kfree(qr);
+	}
+	spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
+
+	if (atomic_read(&T_TASK(cmd)->t_transport_queue_active)) {
+		printk(KERN_ERR "ITT: 0x%08x t_transport_queue_active: %d\n",
+			CMD_TFO(cmd)->get_task_tag(cmd),
+			atomic_read(&T_TASK(cmd)->t_transport_queue_active));
+	}
+}
+
+void transport_complete_cmd(se_cmd_t *cmd, int success)
+{
+	int t_state;
+	unsigned long flags;
+
+	spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+	if (!success) {
+		cmd->transport_error_status =
+			PYX_TRANSPORT_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+		t_state = TRANSPORT_COMPLETE_FAILURE;
+	} else {
+		t_state = TRANSPORT_COMPLETE_OK;
+	}
+	atomic_set(&T_TASK(cmd)->t_transport_complete, 1);
+	spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+	cmd->transport_add_cmd_to_queue(cmd, t_state);
+}
+
+/*	transport_complete_task():
+ *
+ *	Called from interrupt and non interrupt context depending
+ *	on the transport plugin.
+ */
+void transport_complete_task(se_task_t *task, int success)
+{
+	se_cmd_t *cmd = TASK_CMD(task);
+	se_device_t *dev = task->se_dev;
+	int t_state;
+	unsigned long flags;
+#if 0
+	printk(KERN_INFO "task: %p CDB: 0x%02x obj_ptr: %p\n", task,
+			T_TASK(cmd)->t_task_cdb[0], dev);
+#endif
+	if (dev) {
+		spin_lock_irqsave(&SE_HBA(dev)->hba_queue_lock, flags);
+		atomic_inc(&dev->depth_left);
+		atomic_inc(&SE_HBA(dev)->left_queue_depth);
+		spin_unlock_irqrestore(&SE_HBA(dev)->hba_queue_lock, flags);
+	}
+
+	spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+	atomic_set(&task->task_active, 0);
+
+	/*
+	 * See if any sense data exists, if so set the TASK_SENSE flag.
+	 * Also check for any other post completion work that needs to be
+	 * done by the plugins.
+	 */
+	if (!dev)
+		goto check_task_stop;
+
+	if (TRANSPORT(dev)->transport_complete(task) != 0) {
+		cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE;
+		task->task_sense = 1;
+		success = 1;
+	}
+
+	/*
+	 * See if we are waiting for outstanding se_task_t
+	 * to complete for an exception condition
+	 */
+check_task_stop:
+	if (atomic_read(&task->task_stop)) {
+		/*
+		 * Decrement T_TASK(cmd)->t_se_count if this task had
+		 * previously thrown its timeout exception handler.
+		 */
+		if (atomic_read(&task->task_timeout)) {
+			atomic_dec(&T_TASK(cmd)->t_se_count);
+			atomic_set(&task->task_timeout, 0);
+		}
+		spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+		up(&task->task_stop_sem);
+		return;
+	}
+	/*
+	 * If the task's timeout handler has fired, use the t_task_cdbs_timeout
+	 * left counter to determine when the se_cmd_t is ready to be queued to
+	 * the processing thread.
+	 */
+	if (atomic_read(&task->task_timeout)) {
+		if (!(atomic_dec_and_test(
+				&T_TASK(cmd)->t_task_cdbs_timeout_left))) {
+			spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock,
+				flags);
+			return;
+		}
+		t_state = TRANSPORT_COMPLETE_TIMEOUT;
+		spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+		cmd->transport_add_cmd_to_queue(cmd, t_state);
+		return;
+	}
+	atomic_dec(&T_TASK(cmd)->t_task_cdbs_timeout_left);
+
+#ifdef DEBUG_DEV
+	if (dev) {
+		if (__iscsi_debug_dev(dev) != 0) {
+			success = 0;
+			task->task_scsi_status = 1;
+			cmd->transport_error_status =
+			PYX_TRANSPORT_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+		}
+	}
+#endif /* DEBUG_DEV */
+
+	/*
+	 * Decrement the outstanding t_task_cdbs_left count.  The last
+	 * se_task_t from se_cmd_t will complete itself into the
+	 * device queue depending upon int success.
+	 */
+	if (!(atomic_dec_and_test(&T_TASK(cmd)->t_task_cdbs_left))) {
+		if (!success)
+			T_TASK(cmd)->t_tasks_failed = 1;
+
+		spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+		return;
+	}
+
+	if (!success || T_TASK(cmd)->t_tasks_failed) {
+		t_state = TRANSPORT_COMPLETE_FAILURE;
+		if (!task->task_error_status) {
+			task->task_error_status =
+				PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
+			cmd->transport_error_status =
+				PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
+		}
+	} else {
+		atomic_set(&T_TASK(cmd)->t_transport_complete, 1);
+		t_state = TRANSPORT_COMPLETE_OK;
+	}
+	spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+	cmd->transport_add_cmd_to_queue(cmd, t_state);
+}
+
+/*	__transport_add_task_to_execute_queue():
+ *
+ *	Called with se_dev_t->execute_task_lock called.
+ */
+static void __transport_add_task_to_execute_queue(
+	se_task_t *task,
+	se_device_t *dev)
+{
+	list_add_tail(&task->t_execute_list, &dev->execute_task_list);
+	atomic_inc(&dev->execute_tasks);
+
+	if (atomic_read(&task->task_state_active))
+		return;
+
+	list_add_tail(&task->t_state_list, &dev->state_task_list);
+	atomic_set(&task->task_state_active, 1);
+
+	DEBUG_TSTATE("Added ITT: 0x%08x task[%p] to dev: %p\n",
+		CMD_TFO(task->task_se_cmd)->get_task_tag(task->task_se_cmd),
+		task, dev);
+}
+
+/*	transport_add_task_to_execute_queue():
+ *
+ *
+ */
+void transport_add_task_to_execute_queue(se_task_t *task, se_device_t *dev)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&dev->execute_task_lock, flags);
+	list_add_tail(&task->t_execute_list, &dev->execute_task_list);
+	atomic_inc(&dev->execute_tasks);
+
+	if (atomic_read(&task->task_state_active)) {
+		spin_unlock_irqrestore(&dev->execute_task_lock, flags);
+		return;
+	}
+
+	list_add_tail(&task->t_state_list, &dev->state_task_list);
+	atomic_set(&task->task_state_active, 1);
+
+	DEBUG_TSTATE("Added ITT: 0x%08x task[%p] to dev: %p\n",
+		CMD_TFO(task->task_se_cmd)->get_task_tag(task->task_se_cmd),
+		task, dev);
+
+	spin_unlock_irqrestore(&dev->execute_task_lock, flags);
+}
+
+static void transport_add_tasks_to_state_queue(se_cmd_t *cmd)
+{
+	se_device_t *dev;
+	se_task_t *task;
+	unsigned long flags;
+
+	spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+	list_for_each_entry(task, &T_TASK(cmd)->t_task_list, t_list) {
+		dev = task->se_dev;
+
+		if (atomic_read(&task->task_state_active))
+			continue;
+
+		spin_lock(&dev->execute_task_lock);
+		list_add_tail(&task->t_state_list, &dev->state_task_list);
+		atomic_set(&task->task_state_active, 1);
+
+		DEBUG_TSTATE("Added ITT: 0x%08x task[%p] to dev: %p\n",
+			CMD_TFO(task->task_se_cmd)->get_task_tag(
+			task->task_se_cmd), task, dev);
+
+		spin_unlock(&dev->execute_task_lock);
+	}
+	spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+}
+
+/*	transport_add_tasks_from_cmd():
+ *
+ *
+ */
+void transport_add_tasks_from_cmd(se_cmd_t *cmd)
+{
+	se_device_t *dev = SE_DEV(cmd);
+	se_task_t *task;
+	unsigned long flags;
+
+	spin_lock_irqsave(&dev->execute_task_lock, flags);
+	list_for_each_entry(task, &T_TASK(cmd)->t_task_list, t_list) {
+		if (atomic_read(&task->task_execute_queue))
+			continue;
+
+		__transport_add_task_to_execute_queue(task, dev);
+		atomic_set(&task->task_execute_queue, 1);
+	}
+	spin_unlock_irqrestore(&dev->execute_task_lock, flags);
+
+	return;
+}
+
+/*	transport_get_task_from_execute_queue():
+ *
+ *	Called with dev->execute_task_lock held.
+ */
+se_task_t *transport_get_task_from_execute_queue(se_device_t *dev)
+{
+	se_task_t *task;
+
+	if (list_empty(&dev->execute_task_list))
+		return NULL;
+
+	list_for_each_entry(task, &dev->execute_task_list, t_execute_list)
+		break;
+
+	list_del(&task->t_execute_list);
+	atomic_dec(&dev->execute_tasks);
+
+	return task;
+}
+
+/*	transport_remove_task_from_execute_queue():
+ *
+ *
+ */
+static void transport_remove_task_from_execute_queue(
+	se_task_t *task,
+	se_device_t *dev)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&dev->execute_task_lock, flags);
+	list_del(&task->t_execute_list);
+	atomic_dec(&dev->execute_tasks);
+	spin_unlock_irqrestore(&dev->execute_task_lock, flags);
+}
+
+/*	transport_check_device_tcq():
+ *
+ *
+ */
+int transport_check_device_tcq(
+	se_device_t *dev,
+	u32 unpacked_lun,
+	u32 device_tcq)
+{
+	if (device_tcq > dev->queue_depth) {
+		printk(KERN_ERR "Attempting to set storage device queue depth"
+			" to %d while transport maximum is %d on LUN: %u,"
+			" ignoring request\n", device_tcq, dev->queue_depth,
+			unpacked_lun);
+		return -1;
+	} else if (!device_tcq) {
+		printk(KERN_ERR "Attempting to set storage device queue depth"
+			" to 0 on LUN: %u, ignoring request\n", unpacked_lun);
+		return -1;
+	}
+
+	dev->queue_depth = device_tcq;
+	atomic_set(&dev->depth_left, dev->queue_depth);
+	printk(KERN_INFO "Reset Device Queue Depth to %u for Logical Unit"
+		" Number: %u\n", dev->queue_depth, unpacked_lun);
+
+	return 0;
+}
+EXPORT_SYMBOL(transport_check_device_tcq);
+
+unsigned char *transport_dump_cmd_direction (se_cmd_t *cmd)
+{
+	switch (cmd->data_direction) {
+	case SE_DIRECTION_NONE:
+		return "NONE";
+	case SE_DIRECTION_READ:
+		return "READ";
+	case SE_DIRECTION_WRITE:
+		return "WRITE";
+	case SE_DIRECTION_BIDI:
+		return "BIDI";
+	default:
+		break;
+	}
+
+	return "UNKNOWN";
+}
+
+void transport_dump_dev_state(
+	se_device_t *dev,
+	char *b,
+	int *bl)
+{
+	*bl += sprintf(b + *bl, "Status: ");
+	switch (dev->dev_status) {
+	case TRANSPORT_DEVICE_ACTIVATED:
+		*bl += sprintf(b + *bl, "ACTIVATED");
+		break;
+	case TRANSPORT_DEVICE_DEACTIVATED:
+		*bl += sprintf(b + *bl, "DEACTIVATED");
+		break;
+	case TRANSPORT_DEVICE_SHUTDOWN:
+		*bl += sprintf(b + *bl, "SHUTDOWN");
+		break;
+	case TRANSPORT_DEVICE_OFFLINE_ACTIVATED:
+	case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED:
+		*bl += sprintf(b + *bl, "OFFLINE");
+		break;
+	default:
+		*bl += sprintf(b + *bl, "UNKNOWN=%d", dev->dev_status);
+		break;
+	}
+
+	*bl += sprintf(b + *bl, "  Execute/Left/Max Queue Depth: %d/%d/%d",
+		atomic_read(&dev->execute_tasks), atomic_read(&dev->depth_left),
+		dev->queue_depth);
+	*bl += sprintf(b + *bl, "  SectorSize: %u  MaxSectors: %u\n",
+		DEV_ATTRIB(dev)->block_size, DEV_ATTRIB(dev)->max_sectors);
+	*bl += sprintf(b + *bl, "        ");
+}
+
+void transport_dump_dev_info(
+	se_device_t *dev,
+	se_lun_t *lun,
+	unsigned long long total_bytes,
+	char *b,        /* Pointer to info buffer */
+	int *bl)
+{
+	se_subsystem_api_t *t;
+	int ret = 0;
+
+	t = (se_subsystem_api_t *)plugin_get_obj(PLUGIN_TYPE_TRANSPORT,
+			dev->type, &ret);
+	if (!t || (ret != 0))
+		return;
+
+	t->get_dev_info(dev, b, bl);
+	*bl += sprintf(b + *bl, "        ");
+	*bl += sprintf(b + *bl, "Type: %s ",
+		scsi_device_type(TRANSPORT(dev)->get_device_type(dev)));
+	*bl += sprintf(b + *bl, "ANSI SCSI revision: %02x  ",
+		TRANSPORT(dev)->get_device_rev(dev));
+
+	if (DEV_OBJ_API(dev)->get_t10_wwn) {
+		t10_wwn_t *wwn = DEV_OBJ_API(dev)->get_t10_wwn((void *)dev);
+
+		*bl += sprintf(b + *bl, "Unit Serial: %s  ",
+			((strlen(wwn->unit_serial) != 0) ?
+			(char *)wwn->unit_serial : "None"));
+	}
+	*bl += sprintf(b + *bl, "%s", "DIRECT");
+
+	if ((DEV_OBJ_API(dev)->check_count(&dev->dev_access_obj)) ||
+	    (DEV_OBJ_API(dev)->check_count(&dev->dev_feature_obj)))
+		*bl += sprintf(b + *bl, "  ACCESSED\n");
+	else if (DEV_OBJ_API(dev)->check_count(&dev->dev_export_obj))
+		*bl += sprintf(b + *bl, "  EXPORTED\n");
+	else
+		*bl += sprintf(b + *bl, "  FREE\n");
+
+	if (lun) {
+		*bl += sprintf(b + *bl, "        Core Host ID: %u LUN: %u",
+			dev->se_hba->hba_id, lun->unpacked_lun);
+		if (!(TRANSPORT(dev)->get_device_type(dev))) {
+			*bl += sprintf(b + *bl, "  Active Cmds: %d  Total Bytes"
+				": %llu\n", atomic_read(&dev->active_cmds),
+			total_bytes);
+		} else {
+			*bl += sprintf(b + *bl, "  Active Cmds: %d\n",
+				atomic_read(&dev->active_cmds));
+		}
+	} else {
+		if (!(TRANSPORT(dev)->get_device_type(dev))) {
+			*bl += sprintf(b + *bl, "        Core Host ID: %u"
+				"  Active Cmds: %d  Total Bytes: %llu\n",
+				dev->se_hba->hba_id,
+				atomic_read(&dev->active_cmds), total_bytes);
+		} else {
+			*bl += sprintf(b + *bl, "        CoreI Host ID: %u"
+				"  Active Cmds: %d\n", dev->se_hba->hba_id,
+				atomic_read(&dev->active_cmds));
+		}
+	}
+}
+
+/*	transport_release_all_cmds():
+ *
+ *
+ */
+static void transport_release_all_cmds(se_device_t *dev)
+{
+	se_cmd_t *cmd = NULL;
+	se_queue_req_t *qr = NULL, *qr_p = NULL;
+	int bug_out = 0, t_state;
+	unsigned long flags;
+
+	spin_lock_irqsave(&dev->dev_queue_obj->cmd_queue_lock, flags);
+	list_for_each_entry_safe(qr, qr_p, &dev->dev_queue_obj->qobj_list,
+				qr_list) {
+
+		cmd = (se_cmd_t *)qr->cmd;
+		t_state = qr->state;
+		list_del(&qr->qr_list);
+		kfree(qr);
+		spin_unlock_irqrestore(&dev->dev_queue_obj->cmd_queue_lock,
+				flags);
+
+		printk(KERN_ERR "Releasing %s ITT: 0x%08x, i_state: %u,"
+			" t_state: %u directly\n",
+			(cmd->se_cmd_flags & SCF_CMD_PASSTHROUGH) ?
+			"Passthrough" : "Normal",
+			CMD_TFO(cmd)->get_task_tag(cmd),
+			CMD_TFO(cmd)->get_cmd_state(cmd), t_state);
+
+		transport_release_fe_cmd(cmd);
+		bug_out = 1;
+
+		spin_lock_irqsave(&dev->dev_queue_obj->cmd_queue_lock, flags);
+	}
+	spin_unlock_irqrestore(&dev->dev_queue_obj->cmd_queue_lock, flags);
+#if 0
+	if (bug_out)
+		BUG();
+#endif
+}
+
+/*	transport_dev_write_pending_nop():
+ *
+ *
+ */
+static int transport_dev_write_pending_nop(se_task_t *task)
+{
+	return 0;
+}
+
+static int transport_get_inquiry(
+	se_obj_lun_type_t *obj_api,
+	t10_wwn_t *wwn,
+	void *obj_ptr)
+{
+	se_cmd_t *cmd;
+	unsigned char *buf;
+	int i;
+	unsigned char cdb[SCSI_CDB_SIZE];
+
+	memset(cdb, 0, SCSI_CDB_SIZE);
+	cdb[0] = INQUIRY;
+	cdb[3] = (INQUIRY_LEN >> 8) & 0xff;
+	cdb[4] = (INQUIRY_LEN & 0xff);
+
+	cmd = transport_allocate_passthrough(&cdb[0],  SE_DIRECTION_READ,
+			0, NULL, 0, INQUIRY_LEN, obj_api, obj_ptr);
+	if (!(cmd))
+		return -1;
+
+	if (transport_generic_passthrough(cmd) < 0) {
+		transport_passthrough_release(cmd);
+		return -1;
+	}
+
+	buf = (unsigned char *)T_TASK(cmd)->t_task_buf;
+	/*
+	 * Save the basic Vendor, Model and Revision in passed t10_wwn_t.
+	 * We will obtain the VPD in a seperate passthrough operation.
+	 */
+	memcpy((void *)&wwn->vendor[0], (void *)&buf[8],
+			sizeof(wwn->vendor));
+	memcpy((void *)&wwn->model[0], (void *)&buf[16],
+			sizeof(wwn->model));
+	memcpy((void *)&wwn->revision[0], (void *)&buf[32],
+			sizeof(wwn->revision));
+
+	printk("  Vendor: ");
+	for (i = 8; i < 16; i++)
+		if (buf[i] >= 0x20 && i < buf[4] + 5)
+			printk("%c", buf[i]);
+		else
+			printk(" ");
+
+	printk("  Model: ");
+	for (i = 16; i < 32; i++)
+		if (buf[i] >= 0x20 && i < buf[4] + 5)
+			printk("%c", buf[i]);
+		else
+			printk(" ");
+
+	printk("  Revision: ");
+	for (i = 32; i < 36; i++)
+		if (buf[i] >= 0x20 && i < buf[4] + 5)
+			printk("%c", buf[i]);
+		else
+			printk(" ");
+
+	printk("\n");
+
+	i = buf[0] & 0x1f;
+
+	printk("  Type:   %s ", scsi_device_type(i));
+	printk("                 ANSI SCSI revision: %02x",
+				buf[2] & 0x07);
+	if ((buf[2] & 0x07) == 1 && (buf[3] & 0x0f) == 1)
+		printk(" CCS\n");
+	else
+		printk("\n");
+
+	transport_passthrough_release(cmd);
+	return 0;
+}
+
+static int transport_get_inquiry_vpd_serial(
+	se_obj_lun_type_t *obj_api,
+	t10_wwn_t *wwn,
+	void *obj_ptr)
+{
+	unsigned char *buf;
+	se_cmd_t *cmd;
+	unsigned char cdb[SCSI_CDB_SIZE];
+
+	memset(cdb, 0, SCSI_CDB_SIZE);
+	cdb[0] = INQUIRY;
+	cdb[1] = 0x01; /* Query VPD */
+	cdb[2] = 0x80; /* Unit Serial Number */
+	cdb[3] = (INQUIRY_VPD_SERIAL_LEN >> 8) & 0xff;
+	cdb[4] = (INQUIRY_VPD_SERIAL_LEN & 0xff);
+
+	cmd = transport_allocate_passthrough(&cdb[0], SE_DIRECTION_READ,
+			0, NULL, 0, INQUIRY_VPD_SERIAL_LEN, obj_api, obj_ptr);
+	if (!(cmd))
+		return -1;
+
+	if (transport_generic_passthrough(cmd) < 0) {
+		transport_passthrough_release(cmd);
+		return -1;
+	}
+
+	buf = (unsigned char *)T_TASK(cmd)->t_task_buf;
+
+	printk(KERN_INFO "T10 VPD Unit Serial Number: %s\n", &buf[4]);
+	snprintf(&wwn->unit_serial[0], INQUIRY_VPD_SERIAL_LEN, "%s", &buf[4]);
+
+	transport_passthrough_release(cmd);
+	return 0;
+}
+
+static const char hex_str[] = "0123456789abcdef";
+
+void transport_dump_vpd_proto_id(
+	t10_vpd_t *vpd,
+	unsigned char *p_buf,
+	int p_buf_len)
+{
+	unsigned char buf[VPD_TMP_BUF_SIZE];
+	int len;
+
+	memset(buf, 0, VPD_TMP_BUF_SIZE);
+	len = sprintf(buf, "T10 VPD Protocol Identifier: ");
+
+	switch (vpd->protocol_identifier) {
+	case 0x00:
+		sprintf(buf+len, "Fibre Channel\n");
+		break;
+	case 0x10:
+		sprintf(buf+len, "Parallel SCSI\n");
+		break;
+	case 0x20:
+		sprintf(buf+len, "SSA\n");
+		break;
+	case 0x30:
+		sprintf(buf+len, "IEEE 1394\n");
+		break;
+	case 0x40:
+		sprintf(buf+len, "SCSI Remote Direct Memory Access"
+				" Protocol\n");
+		break;
+	case 0x50:
+		sprintf(buf+len, "Internet SCSI (iSCSI)\n");
+		break;
+	case 0x60:
+		sprintf(buf+len, "SAS Serial SCSI Protocol\n");
+		break;
+	case 0x70:
+		sprintf(buf+len, "Automation/Drive Interface Transport"
+				" Protocol\n");
+		break;
+	case 0x80:
+		sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n");
+		break;
+	default:
+		sprintf(buf+len, "Unknown 0x%02x\n",
+				vpd->protocol_identifier);
+		break;
+	}
+
+	if (p_buf)
+		strncpy(p_buf, buf, p_buf_len);
+	else
+		printk(KERN_INFO "%s", buf);
+}
+
+void transport_set_vpd_proto_id(t10_vpd_t *vpd, unsigned char *page_83)
+{
+	/*
+	 * Check if the Protocol Identifier Valid (PIV) bit is set..
+	 *
+	 * from spc3r23.pdf section 7.5.1
+	 */
+	if (page_83[1] & 0x80) {
+		vpd->protocol_identifier = (page_83[0] & 0xf0);
+		vpd->protocol_identifier_set = 1;
+		transport_dump_vpd_proto_id(vpd, NULL, 0);
+	}
+}
+
+int transport_dump_vpd_assoc(
+	t10_vpd_t *vpd,
+	unsigned char *p_buf,
+	int p_buf_len)
+{
+	unsigned char buf[VPD_TMP_BUF_SIZE];
+	int ret = 0, len;
+
+	memset(buf, 0, VPD_TMP_BUF_SIZE);
+	len = sprintf(buf, "T10 VPD Identifier Association: ");
+
+	switch (vpd->association) {
+	case 0x00:
+		sprintf(buf+len, "addressed logical unit\n");
+		break;
+	case 0x10:
+		sprintf(buf+len, "target port\n");
+		break;
+	case 0x20:
+		sprintf(buf+len, "SCSI target device\n");
+		break;
+	default:
+		sprintf(buf+len, "Unknown 0x%02x\n", vpd->association);
+		ret = -1;
+		break;
+	}
+
+	if (p_buf)
+		strncpy(p_buf, buf, p_buf_len);
+	else
+		printk("%s", buf);
+
+	return ret;
+}
+
+static int transport_set_vpd_assoc(t10_vpd_t *vpd, unsigned char *page_83)
+{
+	/*
+	 * The VPD identification association..
+	 *
+	 * from spc3r23.pdf Section 7.6.3.1 Table 297
+	 */
+	vpd->association = (page_83[1] & 0x30);
+	return transport_dump_vpd_assoc(vpd, NULL, 0);
+}
+
+int transport_dump_vpd_ident_type(
+	t10_vpd_t *vpd,
+	unsigned char *p_buf,
+	int p_buf_len)
+{
+	unsigned char buf[VPD_TMP_BUF_SIZE];
+	int ret = 0, len;
+
+	memset(buf, 0, VPD_TMP_BUF_SIZE);
+	len = sprintf(buf, "T10 VPD Identifier Type: ");
+
+	switch (vpd->device_identifier_type) {
+	case 0x00:
+		sprintf(buf+len, "Vendor specific\n");
+		break;
+	case 0x01:
+		sprintf(buf+len, "T10 Vendor ID based\n");
+		break;
+	case 0x02:
+		sprintf(buf+len, "EUI-64 based\n");
+		break;
+	case 0x03:
+		sprintf(buf+len, "NAA\n");
+		break;
+	case 0x04:
+		sprintf(buf+len, "Relative target port identifier\n");
+		break;
+	case 0x08:
+		sprintf(buf+len, "SCSI name string\n");
+		break;
+	default:
+		sprintf(buf+len, "Unsupported: 0x%02x\n",
+				vpd->device_identifier_type);
+		ret = -1;
+		break;
+	}
+
+	if (p_buf)
+		strncpy(p_buf, buf, p_buf_len);
+	else
+		printk("%s", buf);
+
+	return ret;
+}
+
+int transport_set_vpd_ident_type(t10_vpd_t *vpd, unsigned char *page_83)
+{
+	/*
+	 * The VPD identifier type..
+	 *
+	 * from spc3r23.pdf Section 7.6.3.1 Table 298
+	 */
+	vpd->device_identifier_type = (page_83[1] & 0x0f);
+	return transport_dump_vpd_ident_type(vpd, NULL, 0);
+}
+
+int transport_dump_vpd_ident(
+	t10_vpd_t *vpd,
+	unsigned char *p_buf,
+	int p_buf_len)
+{
+	unsigned char buf[VPD_TMP_BUF_SIZE];
+	int ret = 0;
+
+	memset(buf, 0, VPD_TMP_BUF_SIZE);
+
+	switch (vpd->device_identifier_code_set) {
+	case 0x01: /* Binary */
+		sprintf(buf, "T10 VPD Binary Device Identifier: %s\n",
+			&vpd->device_identifier[0]);
+		break;
+	case 0x02: /* ASCII */
+		sprintf(buf, "T10 VPD ASCII Device Identifier: %s\n",
+			&vpd->device_identifier[0]);
+		break;
+	case 0x03: /* UTF-8 */
+		sprintf(buf, "T10 VPD UTF-8 Device Identifier: %s\n",
+			&vpd->device_identifier[0]);
+		break;
+	default:
+		sprintf(buf, "T10 VPD Device Identifier encoding unsupported:"
+			" 0x%02x", vpd->device_identifier_code_set);
+		ret = -1;
+		break;
+	}
+
+	if (p_buf)
+		strncpy(p_buf, buf, p_buf_len);
+	else
+		printk("%s", buf);
+
+	return ret;
+}
+
+int transport_set_vpd_ident(t10_vpd_t *vpd, unsigned char *page_83)
+{
+	int j = 0, i = 4; /* offset to start of the identifer */
+
+	/*
+	 * The VPD Code Set (encoding)
+	 *
+	 * from spc3r23.pdf Section 7.6.3.1 Table 296
+	 */
+	vpd->device_identifier_code_set = (page_83[0] & 0x0f);
+	switch (vpd->device_identifier_code_set) {
+	case 0x01: /* Binary */
+		vpd->device_identifier[j++] =
+				hex_str[vpd->device_identifier_type];
+		while (i < (4 + page_83[3])) {
+			vpd->device_identifier[j++] =
+				hex_str[(page_83[i] & 0xf0) >> 4];
+			vpd->device_identifier[j++] =
+				hex_str[page_83[i] & 0x0f];
+			i++;
+		}
+		break;
+	case 0x02: /* ASCII */
+	case 0x03: /* UTF-8 */
+		while (i < (4 + page_83[3]))
+			vpd->device_identifier[j++] = page_83[i++];
+
+		break;
+	default:
+		break;
+	}
+
+	return transport_dump_vpd_ident(vpd, NULL, 0);
+}
+
+static int transport_get_inquiry_vpd_device_ident(
+	se_obj_lun_type_t *obj_api,
+	t10_wwn_t *wwn,
+	void *obj_ptr)
+{
+	unsigned char *buf, *page_83;
+	se_cmd_t *cmd;
+	t10_vpd_t *vpd;
+	unsigned char cdb[SCSI_CDB_SIZE];
+	int ident_len, page_len, off = 4, ret = 0;
+
+	memset(cdb, 0, SCSI_CDB_SIZE);
+	cdb[0] = INQUIRY;
+	cdb[1] = 0x01; /* Query VPD */
+	cdb[2] = 0x83; /* Device Identifier */
+	cdb[3] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN >> 8) & 0xff;
+	cdb[4] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN & 0xff);
+
+	cmd = transport_allocate_passthrough(&cdb[0], SE_DIRECTION_READ,
+			0, NULL, 0, INQUIRY_VPD_DEVICE_IDENTIFIER_LEN,
+			obj_api, obj_ptr);
+	if (!(cmd))
+		return -1;
+
+	if (transport_generic_passthrough(cmd) < 0) {
+		transport_passthrough_release(cmd);
+		return -1;
+	}
+
+	buf = (unsigned char *)T_TASK(cmd)->t_task_buf;
+	page_len = (buf[2] << 8) | buf[3];
+	printk("T10 VPD Page Length: %d\n", page_len);
+
+	while (page_len > 0) {
+		/* Grab a pointer to the Identification descriptor */
+		page_83 = &buf[off];
+		ident_len = page_83[3];
+		if (!(ident_len)) {
+			printk(KERN_ERR "page_83[3]: identifier"
+					" length zero!\n");
+			break;
+		}
+		printk(KERN_INFO "T10 VPD Identifer Length: %d\n", ident_len);
+
+		vpd = kzalloc(sizeof(t10_vpd_t), GFP_KERNEL);
+		if (!(vpd)) {
+			printk(KERN_ERR "Unable to allocate memory for"
+					" t10_vpd_t\n");
+			ret = -1;
+			goto out;
+		}
+		INIT_LIST_HEAD(&vpd->vpd_list);
+
+		transport_set_vpd_proto_id(vpd, page_83);
+		transport_set_vpd_assoc(vpd, page_83);
+
+		if (transport_set_vpd_ident_type(vpd, page_83) < 0) {
+			off += (ident_len + 4);
+			page_len -= (ident_len + 4);
+			kfree(vpd);
+			continue;
+		}
+		if (transport_set_vpd_ident(vpd, page_83) < 0) {
+			off += (ident_len + 4);
+			page_len -= (ident_len + 4);
+			kfree(vpd);
+			continue;
+		}
+
+		list_add_tail(&vpd->vpd_list, &wwn->t10_vpd_list);
+		off += (ident_len + 4);
+		page_len -= (ident_len + 4);
+	}
+out:
+	transport_passthrough_release(cmd);
+	return 0;
+}
+
+static int transport_get_read_capacity(se_device_t *dev)
+{
+	unsigned char cdb[SCSI_CDB_SIZE], *buf;
+	u32 blocks, v1, v2;
+	se_cmd_t *cmd;
+	unsigned long long blocks_long;
+
+	memset(cdb, 0, SCSI_CDB_SIZE);
+	cdb[0] = 0x25; /* READ_CAPACITY */
+
+	cmd = transport_allocate_passthrough(&cdb[0], SE_DIRECTION_READ,
+			0, NULL, 0, READ_CAP_LEN, DEV_OBJ_API(dev),
+			(void *)dev);
+	if (!(cmd))
+		return -1;
+
+	if (transport_generic_passthrough(cmd) < 0) {
+		transport_passthrough_release(cmd);
+		return -1;
+	}
+
+	buf = (unsigned char *)T_TASK(cmd)->t_task_buf;
+	blocks = (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
+
+	transport_passthrough_release(cmd);
+
+	if (blocks != 0xFFFFFFFF) {
+		dev->dev_sectors_total = blocks;
+		dev->dev_generate_cdb = &split_cdb_RW_10;
+		return 0;
+	}
+
+	printk(KERN_INFO "READ_CAPACITY returned 0xFFFFFFFF, issuing"
+			" SAI_READ_CAPACITY_16\n");
+
+	memset(cdb, 0, SCSI_CDB_SIZE);
+	cdb[0] = 0x9e; /* SERVICE_ACTION_IN */
+	cdb[1] = 0x10; /* SAI_READ_CAPACITY_16 */
+	cdb[13] = 12;
+
+	cmd = transport_allocate_passthrough(&cdb[0], SE_DIRECTION_READ,
+			0, NULL, 0, 12, DEV_OBJ_API(dev), (void *)dev);
+	if (!(cmd))
+		return -1;
+
+	if (transport_generic_passthrough(cmd) < 0) {
+		transport_passthrough_release(cmd);
+		return -1;
+	}
+
+	buf = (unsigned char *)T_TASK(cmd)->t_task_buf;
+	v1 = (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
+	v2 = (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | buf[7];
+	blocks_long = ((unsigned long long)v2 | (unsigned long long)v1 << 32);
+
+	transport_passthrough_release(cmd);
+
+	dev->dev_sectors_total = blocks_long;
+	dev->dev_generate_cdb = &split_cdb_RW_16;
+
+	return 0;
+}
+
+/*	transport_add_device_to_core_hba():
+ *
+ *	Note that some plugins (IBLOCK) will pass device_flags ==
+ *	DF_CLAIMED_BLOCKDEV signifying OS that a dependent block_device
+ *	has been claimed.  In exception cases we will release said
+ *	block_device ourselves.
+ */
+se_device_t *transport_add_device_to_core_hba(
+	se_hba_t *hba,
+	se_subsystem_api_t *transport,
+	se_subsystem_dev_t *se_dev,
+	u32 device_flags,
+	void *transport_dev)
+{
+	int ret = 0;
+	se_device_t  *dev;
+
+	dev = kzalloc(sizeof(se_device_t), GFP_KERNEL);
+	if (!(dev)) {
+		printk(KERN_ERR "Unable to allocate memory for se_dev_t\n");
+		return NULL;
+	}
+	dev->dev_queue_obj = kzalloc(sizeof(se_queue_obj_t), GFP_KERNEL);
+	if (!(dev->dev_queue_obj)) {
+		printk(KERN_ERR "Unable to allocate memory for"
+				" dev->dev_queue_obj\n");
+		kfree(dev);
+		return NULL;
+	}
+	transport_init_queue_obj(dev->dev_queue_obj);
+
+	dev->dev_status_queue_obj = kzalloc(sizeof(se_queue_obj_t),
+					GFP_KERNEL);
+	if (!(dev->dev_status_queue_obj)) {
+		printk(KERN_ERR "Unable to allocate memory for"
+				" dev->dev_status_queue_obj\n");
+		kfree(dev->dev_queue_obj);
+		kfree(dev);
+		return NULL;
+	}
+	transport_init_queue_obj(dev->dev_status_queue_obj);
+
+	dev->dev_flags		= device_flags;
+	dev->dev_status		|= TRANSPORT_DEVICE_DEACTIVATED;
+	dev->type		= transport->type;
+	dev->dev_ptr		= (void *) transport_dev;
+	dev->se_hba		= hba;
+	dev->se_sub_dev		= se_dev;
+	dev->transport		= transport;
+	atomic_set(&dev->active_cmds, 0);
+	INIT_LIST_HEAD(&dev->dev_list);
+	INIT_LIST_HEAD(&dev->dev_sep_list);
+	INIT_LIST_HEAD(&dev->dev_tmr_list);
+	INIT_LIST_HEAD(&dev->execute_task_list);
+	INIT_LIST_HEAD(&dev->state_task_list);
+	spin_lock_init(&dev->execute_task_lock);
+	spin_lock_init(&dev->state_task_lock);
+	spin_lock_init(&dev->dev_reservation_lock);
+	spin_lock_init(&dev->dev_status_lock);
+	spin_lock_init(&dev->dev_status_thr_lock);
+	spin_lock_init(&dev->se_port_lock);
+	spin_lock_init(&dev->se_tmr_lock);
+
+	dev->queue_depth	= TRANSPORT(dev)->get_queue_depth(dev);
+	atomic_set(&dev->depth_left, dev->queue_depth);
+
+	se_dev_set_default_attribs(dev);
+
+	dev->write_pending = (transport->write_pending) ?
+		transport->write_pending : &transport_dev_write_pending_nop;
+
+#ifdef SNMP_SUPPORT
+	dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX);
+	dev->creation_time = get_jiffies_64();
+	spin_lock_init(&dev->stats_lock);
+#endif /* SNMP_SUPPORT */
+
+	spin_lock(&hba->device_lock);
+	list_add_tail(&dev->dev_list, &hba->hba_dev_list);
+	hba->dev_count++;
+	spin_unlock(&hba->device_lock);
+
+	/*
+	 * Get this se_device_t's API from the device object plugin.
+	 */
+	dev->dev_obj_api = se_obj_get_api(TRANSPORT_LUN_TYPE_DEVICE);
+	if (!(dev->dev_obj_api))
+		goto out;
+	/*
+	 * Setup the Reservations infrastructure for se_device_t
+	 */
+	core_setup_reservations(dev);
+	/*
+	 * Setup the Asymmetric Logical Unit Assignment for se_device_t
+	 */
+	if (core_setup_alua(dev) < 0)
+		goto out;
+	/*
+	 * Startup the se_device_t processing thread
+	 */
+	if (transport_generic_activate_device(dev) < 0)
+		goto out;
+	/*
+	 * This HBA is reserved for internal storage engine / feature plugin use
+	 */
+	if (hba->hba_flags & HBA_FLAGS_INTERNAL_USE) {
+		ret = transport_get_read_capacity(dev);
+		if (ret < 0)
+			goto out;
+
+		return dev;
+	}
+
+	ret = transport_get_inquiry(DEV_OBJ_API(dev),
+			DEV_T10_WWN(dev), (void *)dev);
+	if (ret < 0)
+		goto out;
+	/*
+	 * Locate VPD WWN Information used for various purposes within
+	 * the Storage Engine.
+	 */
+	if (!(transport_get_inquiry_vpd_serial(DEV_OBJ_API(dev),
+			DEV_T10_WWN(dev), (void *)dev))) {
+		/*
+		 * If VPD Unit Serial returned GOOD status, try
+		 * VPD Device Identification page (0x83).
+		 */
+		transport_get_inquiry_vpd_device_ident(DEV_OBJ_API(dev),
+			DEV_T10_WWN(dev), (void *)dev);
+	}
+
+	/*
+	 * Only perform the volume scan for peripheral type TYPE_DISK
+	 */
+	if (TRANSPORT(dev)->get_device_type(dev) != 0)
+		return dev;
+
+	/*
+	 * Get the sector count via READ_CAPACITY
+	 */
+	ret = transport_get_read_capacity(dev);
+	if (ret < 0)
+		goto out;
+out:
+	if (!ret)
+		return dev;
+
+	/*
+	 * Release claim to OS dependant block_device that may have been
+	 * set by plugin with passed dev_flags.
+	 */
+	transport_generic_release_phydevice(dev, 0);
+
+	/*
+	 * Release newly allocated state for se_device_t
+	 */
+	transport_generic_deactivate_device(dev);
+
+	spin_lock(&hba->device_lock);
+	list_del(&dev->dev_list);
+	hba->dev_count--;
+	spin_unlock(&hba->device_lock);
+
+	se_release_vpd_for_dev(dev);
+
+	kfree(dev->dev_status_queue_obj);
+	kfree(dev->dev_queue_obj);
+	kfree(dev);
+
+	return NULL;
+}
+
+/*	transport_generic_activate_device():
+ *
+ *
+ */
+int transport_generic_activate_device(se_device_t *dev)
+{
+	char name[16];
+
+	if (TRANSPORT(dev)->activate_device)
+		TRANSPORT(dev)->activate_device(dev);
+
+	memset(name, 0, 16);
+	snprintf(name, 16, "LIO_%s", TRANSPORT(dev)->name);
+
+	dev->process_thread = kthread_run(transport_processing_thread,
+			(void *)dev, name);
+	if (IS_ERR(dev->process_thread)) {
+		printk(KERN_ERR "Unable to create kthread: %s\n", name);
+		return -1;
+	}
+
+	down(&dev->dev_queue_obj->thread_create_sem);
+
+	return 0;
+}
+
+/*	transport_generic_deactivate_device():
+ *
+ *
+ */
+void transport_generic_deactivate_device(se_device_t *dev)
+{
+	if (TRANSPORT(dev)->deactivate_device)
+		TRANSPORT(dev)->deactivate_device(dev);
+
+	kthread_stop(dev->process_thread);
+
+	down(&dev->dev_queue_obj->thread_done_sem);
+}
+
+/*	transport_generic_claim_phydevice()
+ *
+ *	Obtain exclusive access to OS dependant block-device via
+ *	Storage Transport Plugin API.
+ *
+ *	In Linux v2.6 this means calling fs/block_dev.c:bd_claim()
+ *	that is called in an plugin dependent method for claiming
+ *	struct block_device.
+ *
+ *	Returns 0 - Already claimed or not able to claim
+ *	Returns 1 - Successfuly claimed
+ *	Returns < 0 - Error
+ */
+int transport_generic_claim_phydevice(se_device_t *dev)
+{
+	int ret;
+	se_hba_t *hba;
+
+	/*
+	 * This function pointer is present when handling access
+	 * control to a OS dependant block subsystem.
+	 */
+	if (!TRANSPORT(dev)->claim_phydevice)
+		return 0;
+
+	if (dev->dev_flags & DF_READ_ONLY)
+		return 0;
+
+	if (dev->dev_flags & DF_CLAIMED_BLOCKDEV)
+		return 0;
+
+	hba = dev->se_hba;
+	if (!(hba)) {
+		printk(KERN_ERR "se_device_t->se_hba is NULL!\n");
+		return -1;
+	}
+
+	ret = TRANSPORT(dev)->claim_phydevice(hba, dev);
+	if (ret < 0)
+		return ret;
+
+	dev->dev_flags |= DF_CLAIMED_BLOCKDEV;
+
+	return 1;
+}
+EXPORT_SYMBOL(transport_generic_claim_phydevice);
+
+/*	transport_generic_release_phydevice():
+ *
+ *	Release exclusive access from OS dependant block-device via
+ *	Storage Transport Plugin API.
+ *
+ *	In Linux v2.6 this means calling fs/block_dev.c:bd_release()
+ *	see iscsi_target_pscsi.c and iscsi_target_iblock.c functions for
+ *	se_subsystem_api_t->[claim,release]_phydevice()
+ */
+void transport_generic_release_phydevice(se_device_t *dev, int check_pscsi)
+{
+	if (!TRANSPORT(dev)->release_phydevice)
+		return;
+
+	if (dev->dev_flags & DF_READ_ONLY) {
+		if (check_pscsi &&
+		   (TRANSPORT(dev)->transport_type !=
+		    TRANSPORT_PLUGIN_PHBA_PDEV))
+				return;
+
+		TRANSPORT(dev)->release_phydevice(dev);
+		return;
+	}
+
+	if (!(dev->dev_flags & DF_CLAIMED_BLOCKDEV))
+		return;
+
+	if (!dev->dev_ptr) {
+		printk(KERN_ERR "se_device_t->dev_ptr is NULL!\n");
+		BUG();
+	}
+
+	if (check_pscsi) {
+		if (TRANSPORT(dev)->transport_type !=
+		    TRANSPORT_PLUGIN_PHBA_PDEV)
+			return;
+
+		if (dev->dev_flags & DF_PERSISTENT_CLAIMED_BLOCKDEV)
+			return;
+	}
+
+	TRANSPORT(dev)->release_phydevice(dev);
+	dev->dev_flags &= ~DF_CLAIMED_BLOCKDEV;
+}
+
+/*	transport_generic_free_device():
+ *
+ *
+ */
+void transport_generic_free_device(se_device_t *dev)
+{
+	if (!(dev->dev_ptr))
+		return;
+
+	transport_generic_deactivate_device(dev);
+
+	transport_generic_release_phydevice(dev, 0);
+
+	if (TRANSPORT(dev)->free_device)
+		TRANSPORT(dev)->free_device(dev->dev_ptr);
+}
+EXPORT_SYMBOL(transport_generic_free_device);
+
+int transport_allocate_iovecs_for_cmd(
+	se_cmd_t *cmd,
+	u32 iov_count)
+{
+	cmd->iov_data = kzalloc(iov_count * sizeof(struct iovec), GFP_ATOMIC);
+	if (!(cmd->iov_data)) {
+		printk(KERN_ERR "Unable to allocate memory for"
+			" iscsi_cmd_t->iov_data.\n");
+		return -1;
+	}
+	cmd->orig_iov_data_count = iov_count;
+
+	return 0;
+}
+EXPORT_SYMBOL(transport_allocate_iovecs_for_cmd);
+
+/*	transport_generic_allocate_iovecs():
+ *
+ *	Called from transport_generic_new_cmd() in Transport Processing Thread.
+ */
+static int transport_generic_allocate_iovecs(
+	se_cmd_t *cmd)
+{
+	u32 iov_count;
+
+	iov_count = T_TASK(cmd)->t_task_se_num;
+	if (!(iov_count))
+		iov_count = 1;
+#if 0
+	printk(KERN_INFO "Allocated %d iovecs for ITT: 0x%08x t_task_se_num:"
+		" %u\n", iov_count, CMD_TFO(cmd)->get_task_tag(cmd),
+		T_TASK(cmd)->t_task_se_num);
+#endif
+	iov_count += TRANSPORT_IOV_DATA_BUFFER;
+
+	if (transport_allocate_iovecs_for_cmd(cmd, iov_count))
+		return -1;
+
+	return 0;
+}
+
+/*	transport_generic_prepare_cdb():
+ *
+ *	Since the Initiator sees iSCSI devices as LUNs,  the SCSI CDB will
+ *	contain the iSCSI LUN in bits 7-5 of byte 1 as per SAM-2.
+ *	The point of this is since we are mapping iSCSI LUNs to
+ *	SCSI Target IDs having a non-zero LUN in the CDB will throw the
+ *	devices and HBAs for a loop.
+ */
+static inline void transport_generic_prepare_cdb(
+	unsigned char *cdb)
+{
+	switch (cdb[0]) {
+	case READ_10: /* SBC - RDProtect */
+	case READ_12: /* SBC - RDProtect */
+	case READ_16: /* SBC - RDProtect */
+	case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */
+	case VERIFY: /* SBC - VRProtect */
+	case VERIFY_16: /* SBC - VRProtect */
+	case WRITE_VERIFY: /* SBC - VRProtect */
+	case WRITE_VERIFY_12: /* SBC - VRProtect */
+		break;
+	default:
+		cdb[1] &= 0x1f; /* clear logical unit number */
+		break;
+	}
+}
+
+/*	transport_check_device_cdb_sector_count():
+ *
+ *	returns:
+ *	0 on supported request sector count.
+ *	1 on unsupported request sector count.
+ */
+static inline int transport_check_device_cdb_sector_count(
+	se_obj_lun_type_t *se_obj_api,
+	void *se_obj_ptr,
+	u32 sectors)
+{
+	u32 max_sectors;
+
+	max_sectors = se_obj_api->max_sectors(se_obj_ptr);
+	if (!(max_sectors)) {
+		printk(KERN_ERR "TRANSPORT->get_max_sectors returned zero!\n");
+		return 1;
+	}
+
+	if (sectors > max_sectors)
+		return -1;
+
+	return 0;
+}
+
+/*	transport_generic_get_task():
+ *
+ *
+ */
+static se_task_t *transport_generic_get_task(
+	se_transform_info_t *ti,
+	se_cmd_t *cmd,
+	void *se_obj_ptr,
+	se_obj_lun_type_t *se_obj_api)
+{
+	se_task_t *task;
+	unsigned long flags;
+
+	task = kmem_cache_zalloc(se_task_cache, GFP_KERNEL);
+	if (!(task)) {
+		printk(KERN_ERR "Unable to allocate se_task_t\n");
+		return NULL;
+	}
+
+	INIT_LIST_HEAD(&task->t_list);
+	INIT_LIST_HEAD(&task->t_execute_list);
+	INIT_LIST_HEAD(&task->t_state_list);
+	init_MUTEX_LOCKED(&task->task_stop_sem);
+	task->task_no = T_TASK(cmd)->t_task_no++;
+	task->task_se_cmd = cmd;
+
+	DEBUG_SO("se_obj_ptr: %p\n", se_obj_ptr);
+	DEBUG_SO("se_obj_api: %p\n", se_obj_api);
+	DEBUG_SO("Plugin: %s\n", se_obj_api->obj_plugin->plugin_name);
+
+	task->transport_req = se_obj_api->get_transport_req(se_obj_ptr, task);
+	if (!(task->transport_req))
+		return NULL;
+
+	spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+	list_add_tail(&task->t_list, &T_TASK(cmd)->t_task_list);
+	spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+	task->se_obj_api = se_obj_api;
+	task->se_obj_ptr = se_obj_ptr;
+
+	return task;
+}
+
+int transport_generic_obj_start(
+	se_transform_info_t *ti,
+	se_obj_lun_type_t *obj_api,
+	void *p,
+	unsigned long long starting_lba)
+{
+	ti->ti_lba = starting_lba;
+	ti->ti_obj_api = obj_api;
+	ti->ti_obj_ptr = p;
+
+	return 0;
+}
+
+static int transport_process_data_sg_transform(
+	se_cmd_t *cmd,
+	se_transform_info_t *ti)
+{
+	/*
+	 * Already handled in transport_generic_get_cdb_count()
+	 */
+	return 0;
+}
+
+/*	transport_process_control_sg_transform():
+ *
+ *
+ */
+static int transport_process_control_sg_transform(
+	se_cmd_t *cmd,
+	se_transform_info_t *ti)
+{
+	unsigned char *cdb;
+	se_task_t *task;
+	se_mem_t *se_mem, *se_mem_lout = NULL;
+	int ret;
+	u32 se_mem_cnt = 0, task_offset = 0;
+
+	list_for_each_entry(se_mem, T_TASK(cmd)->t_mem_list, se_list)
+		break;
+
+	if (!se_mem) {
+		printk(KERN_ERR "se_mem is NULL!\n");
+		return -1;
+	}
+
+	task = cmd->transport_get_task(ti, cmd, ti->se_obj_ptr,
+				ti->se_obj_api);
+	if (!(task))
+		return -1;
+
+	task->transport_map_task = ti->se_obj_api->get_map_SG(
+			ti->se_obj_ptr, cmd->data_direction);
+
+	cdb = ti->se_obj_api->get_cdb(ti->se_obj_ptr, task);
+	if (cdb)
+		memcpy(cdb, T_TASK(cmd)->t_task_cdb, SCSI_CDB_SIZE);
+
+	task->task_size = cmd->data_length;
+	task->task_sg_num = 1;
+
+	atomic_inc(&T_TASK(cmd)->t_fe_count);
+	atomic_inc(&T_TASK(cmd)->t_se_count);
+
+	ret = ti->se_obj_api->do_se_mem_map(ti->se_obj_ptr, task,
+			T_TASK(cmd)->t_mem_list, NULL, se_mem, &se_mem_lout,
+			&se_mem_cnt, &task_offset);
+	if (ret < 0)
+		return ret;
+
+	DEBUG_CDB_H("task_no[%u]: SCF_SCSI_CONTROL_SG_IO_CDB task_size: %d\n",
+			task->task_no, task->task_size);
+	return 0;
+}
+
+/*	transport_process_control_nonsg_transform():
+ *
+ *
+ */
+static int transport_process_control_nonsg_transform(
+	se_cmd_t *cmd,
+	se_transform_info_t *ti)
+{
+	unsigned char *cdb;
+	se_task_t *task;
+
+	task = cmd->transport_get_task(ti, cmd, ti->se_obj_ptr,
+				ti->se_obj_api);
+	if (!(task))
+		return -1;
+
+	task->transport_map_task = ti->se_obj_api->get_map_non_SG(
+			ti->se_obj_ptr, cmd->data_direction);
+
+	cdb = ti->se_obj_api->get_cdb(ti->se_obj_ptr, task);
+	if (cdb)
+		memcpy(cdb, T_TASK(cmd)->t_task_cdb, SCSI_CDB_SIZE);
+
+	task->task_size = cmd->data_length;
+	task->task_sg_num = 0;
+
+	atomic_inc(&T_TASK(cmd)->t_fe_count);
+	atomic_inc(&T_TASK(cmd)->t_se_count);
+
+	DEBUG_CDB_H("task_no[%u]: SCF_SCSI_CONTROL_NONSG_IO_CDB task_size:"
+			" %d\n", task->task_no, task->task_size);
+	return 0;
+}
+
+/*	transport_process_non_data_transform():
+ *
+ *
+ */
+static int transport_process_non_data_transform(
+	se_cmd_t *cmd,
+	se_transform_info_t *ti)
+{
+	unsigned char *cdb;
+	se_task_t *task;
+
+	task = cmd->transport_get_task(ti, cmd, ti->se_obj_ptr,
+				ti->se_obj_api);
+	if (!(task))
+		return -1;
+
+	task->transport_map_task = ti->se_obj_api->get_map_none(ti->se_obj_ptr);
+
+	cdb = ti->se_obj_api->get_cdb(ti->se_obj_ptr, task);
+	if (cdb)
+		memcpy(cdb, T_TASK(cmd)->t_task_cdb, SCSI_CDB_SIZE);
+
+	task->task_size = cmd->data_length;
+	task->task_sg_num = 0;
+
+	atomic_inc(&T_TASK(cmd)->t_fe_count);
+	atomic_inc(&T_TASK(cmd)->t_se_count);
+
+	DEBUG_CDB_H("task_no[%u]: SCF_SCSI_NON_DATA_CDB task_size: %d\n",
+			task->task_no, task->task_size);
+	return 0;
+}
+
+static int transport_generic_cmd_sequencer(se_cmd_t *, unsigned char *);
+
+void transport_device_setup_cmd(se_cmd_t *cmd)
+{
+	cmd->transport_add_cmd_to_queue = &transport_add_cmd_to_dev_queue;
+	cmd->se_dev = SE_LUN(cmd)->se_dev;
+}
+
+se_cmd_t *__transport_alloc_se_cmd(
+	struct target_core_fabric_ops *tfo,
+	se_session_t *se_sess,
+	void *fabric_cmd_ptr,
+	u32 data_length,
+	int data_direction)
+{
+	se_cmd_t *cmd;
+
+	if (data_direction == SE_DIRECTION_BIDI) {
+		printk(KERN_ERR "SCSI BiDirectional mode not supported yet\n");
+		return ERR_PTR(-ENOSYS);
+	}
+
+	cmd = kmem_cache_zalloc(se_cmd_cache, GFP_KERNEL);
+	if (!(cmd)) {
+		printk(KERN_ERR "kmem_cache_alloc() failed for se_cmd_cache\n");
+		return ERR_PTR(-ENOMEM);
+	}
+	INIT_LIST_HEAD(&cmd->se_lun_list);
+
+	cmd->t_task = kzalloc(sizeof(se_transport_task_t), GFP_KERNEL);
+	if (!(cmd->t_task)) {
+		printk(KERN_ERR "Unable to allocate cmd->t_task\n");
+		kmem_cache_free(se_cmd_cache, cmd);
+		return NULL;
+	}
+
+	cmd->sense_buffer = kzalloc(
+			TRANSPORT_SENSE_BUFFER + tfo->get_fabric_sense_len(),
+			GFP_KERNEL);
+	if (!(cmd->sense_buffer)) {
+		printk(KERN_ERR "Unable to allocate memory for"
+			" cmd->sense_buffer\n");
+		kfree(cmd->t_task);
+		kmem_cache_free(se_cmd_cache, cmd);
+		return NULL;
+	}
+	INIT_LIST_HEAD(&T_TASK(cmd)->t_task_list);
+	init_MUTEX_LOCKED(&T_TASK(cmd)->transport_lun_fe_stop_sem);
+	init_MUTEX_LOCKED(&T_TASK(cmd)->transport_lun_stop_sem);
+	init_MUTEX_LOCKED(&T_TASK(cmd)->t_transport_stop_sem);
+	init_MUTEX_LOCKED(&T_TASK(cmd)->t_transport_passthrough_sem);
+	init_MUTEX_LOCKED(&T_TASK(cmd)->t_transport_passthrough_wsem);
+	spin_lock_init(&T_TASK(cmd)->t_state_lock);
+
+	cmd->se_tfo = tfo;
+	cmd->se_sess = se_sess;
+	cmd->se_fabric_cmd_ptr = fabric_cmd_ptr;
+	cmd->data_length = data_length;
+	cmd->data_direction = data_direction;
+
+	return cmd;
+}
+
+se_cmd_t *transport_alloc_se_cmd(
+	struct target_core_fabric_ops *tfo_api,
+	se_session_t *se_sess,
+	void *fabric_cmd_ptr,
+	u32 data_length,
+	int data_direction)
+{
+	return __transport_alloc_se_cmd(tfo_api, se_sess, fabric_cmd_ptr,
+				data_length, data_direction);
+}
+EXPORT_SYMBOL(transport_alloc_se_cmd);
+
+void transport_free_se_cmd(
+	se_cmd_t *se_cmd)
+{
+	if (se_cmd->se_tmr_req)
+		core_tmr_release_req(se_cmd->se_tmr_req);
+
+	kfree(se_cmd->iov_data);
+	kfree(se_cmd->sense_buffer);
+	kfree(se_cmd->t_task);
+	kmem_cache_free(se_cmd_cache, se_cmd);
+}
+EXPORT_SYMBOL(transport_free_se_cmd);
+
+static void transport_generic_wait_for_tasks(se_cmd_t *, int, int);
+
+/*	transport_generic_allocate_tasks():
+ *
+ *	Called from the iSCSI RX Thread.
+ */
+int transport_generic_allocate_tasks(
+	se_cmd_t *cmd,
+	unsigned char *cdb)
+{
+	int non_data_cdb;
+
+	transport_generic_prepare_cdb(cdb);
+
+	/*
+	 * This is needed for early exceptions.
+	 */
+	cmd->transport_wait_for_tasks = &transport_generic_wait_for_tasks;
+
+	CMD_ORIG_OBJ_API(cmd)->transport_setup_cmd(cmd->se_orig_obj_ptr, cmd);
+	/*
+	 * See if this is a CDB which follows SAM, also grab a function
+	 * pointer to see if we need to do extra work.
+	 */
+	non_data_cdb = transport_generic_cmd_sequencer(cmd, cdb);
+	if (non_data_cdb < 0)
+		return -1;
+	/*
+	 * Copy the original CDB into T_TASK(cmd).
+	 */
+	memcpy(T_TASK(cmd)->t_task_cdb, cdb, SCSI_CDB_SIZE);
+
+#ifdef SNMP_SUPPORT
+	spin_lock(&cmd->se_lun->lun_sep_lock);
+	if (cmd->se_lun->lun_sep)
+		cmd->se_lun->lun_sep->sep_stats.cmd_pdus++;
+	spin_unlock(&cmd->se_lun->lun_sep_lock);
+#endif /* SNMP_SUPPORT */
+
+	switch (non_data_cdb) {
+	case 0:
+		DEBUG_CDB_H("Set cdb[0]: 0x%02x to "
+				"SCF_SCSI_DATA_SG_IO_CDB\n", cdb[0]);
+		cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
+
+		/*
+		 * Get the initial Logical Block Address from the Original
+		 * Command Descriptor Block that arrived on the iSCSI wire.
+		 */
+		T_TASK(cmd)->t_task_lba = (cmd->transport_get_long_lba) ?
+			cmd->transport_get_long_lba(cdb) :
+			cmd->transport_get_lba(cdb);
+
+		break;
+	case 1:
+		DEBUG_CDB_H("Set cdb[0]: 0x%02x to"
+				" SCF_SCSI_CONTROL_SG_IO_CDB\n", cdb[0]);
+		cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+		cmd->transport_cdb_transform =
+				&transport_process_control_sg_transform;
+		break;
+	case 2:
+		DEBUG_CDB_H("Set cdb[0]: 0x%02x to "
+				"SCF_SCSI_CONTROL_NONSG_IO_CDB\n", cdb[0]);
+		cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB;
+		cmd->transport_cdb_transform =
+				&transport_process_control_nonsg_transform;
+		break;
+	case 3:
+		DEBUG_CDB_H("Set cdb[0]: 0x%02x to "
+				"SCF_SCSI_NON_DATA_CDB\n", cdb[0]);
+		cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB;
+		cmd->transport_cdb_transform =
+				&transport_process_non_data_transform;
+		break;
+	case 4:
+		DEBUG_CDB_H("Set cdb[0]: 0x%02x to"
+				" SCF_SCSI_UNSUPPORTED_CDB\n", cdb[0]);
+		cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+		cmd->scsi_sense_reason = UNSUPPORTED_SCSI_OPCODE;
+		return -2;
+	case 5:
+		DEBUG_CDB_H("Set cdb[0]: 0x%02x to"
+				" SCF_SCSI_RESERVATION_CONFLICT\n", cdb[0]);
+		cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+		cmd->se_cmd_flags |= SCF_SCSI_RESERVATION_CONFLICT;
+		cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT;
+		/*
+		 * For UA Interlock Code 11b, a RESERVATION CONFLICT will
+		 * establish a UNIT ATTENTION with PREVIOUS RESERVATION
+		 * CONFLICT STATUS.
+		 *
+		 * See spc4r17, section 7.4.6 Control Mode Page, Table 349
+		 */
+		if (SE_SESS(cmd) &&
+		    DEV_ATTRIB(cmd->se_dev)->emulate_ua_intlck_ctrl == 2)
+			core_scsi3_ua_allocate(SE_SESS(cmd)->se_node_acl,
+				cmd->orig_fe_lun, 0x2C,
+				ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS);
+		return -2;
+	case 6:
+		cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+		cmd->scsi_sense_reason = INVALID_CDB_FIELD;
+		return -2;
+	case 7:
+		cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+		cmd->scsi_sense_reason = ILLEGAL_REQUEST;
+		return -2;
+	case 8:
+		cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+		cmd->scsi_sense_reason = CHECK_CONDITION_UNIT_ATTENTION;
+		return -2;
+	default:
+		break;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(transport_generic_allocate_tasks);
+
+/*	transport_generic_handle_cdb():
+ *
+ *
+ */
+int transport_generic_handle_cdb(
+	se_cmd_t *cmd)
+{
+	if (!SE_LUN(cmd)) {
+		printk(KERN_ERR "SE_LUN(cmd) is NULL\n");
+		return -1;
+	}
+
+	cmd->transport_add_cmd_to_queue(cmd, TRANSPORT_NEW_CMD);
+	return 0;
+}
+EXPORT_SYMBOL(transport_generic_handle_cdb);
+
+/*	transport_generic_handle_data():
+ *
+ *
+ */
+int transport_generic_handle_data(
+	se_cmd_t *cmd)
+{
+	/*
+	 * Make sure that the transport has been disabled by
+	 * transport_write_pending() before readding this se_cmd_t to the
+	 * processing queue.  If it has not yet been reset to zero by the
+	 * processing thread in cmd->transport_add_cmd_to_queue(), let other
+	 * processes run.  If a signal was received, then we assume the
+	 * connection is being failed/shutdown, so we return a failure.
+	 */
+	while (atomic_read(&T_TASK(cmd)->t_transport_active)) {
+		msleep_interruptible(10);
+		if (signal_pending(current))
+			return -1;
+	}
+
+	cmd->transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_WRITE);
+	return 0;
+}
+EXPORT_SYMBOL(transport_generic_handle_data);
+
+/*	transport_generic_handle_tmr():
+ *
+ *
+ */
+int transport_generic_handle_tmr(
+	se_cmd_t *cmd)
+{
+	/*
+	 * This is needed for early exceptions.
+	 */
+	cmd->transport_wait_for_tasks = &transport_generic_wait_for_tasks;
+	CMD_ORIG_OBJ_API(cmd)->transport_setup_cmd(cmd->se_orig_obj_ptr, cmd);
+
+	cmd->transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_TMR);
+	return 0;
+}
+EXPORT_SYMBOL(transport_generic_handle_tmr);
+
+/*	transport_stop_tasks_for_cmd():
+ *
+ *
+ */
+void transport_stop_tasks_for_cmd(se_cmd_t *cmd)
+{
+	se_task_t *task, *task_tmp;
+	unsigned long flags;
+
+	DEBUG_TS("ITT[0x%08x] - Stopping tasks\n",
+		CMD_TFO(cmd)->get_task_tag(cmd));
+
+	/*
+	 * No tasks remain in the execution queue
+	 */
+	spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+	list_for_each_entry_safe(task, task_tmp,
+				&T_TASK(cmd)->t_task_list, t_list) {
+		DEBUG_TS("task_no[%d] - Processing task %p\n",
+				task->task_no, task);
+		/*
+		 * If the se_task_t has not been sent and is not active,
+		 * remove the se_task_t from the execution queue.
+		 */
+		if (!atomic_read(&task->task_sent) &&
+		    !atomic_read(&task->task_active)) {
+			spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock,
+					flags);
+			transport_remove_task_from_execute_queue(task,
+					task->se_dev);
+
+			DEBUG_TS("task_no[%d] - Removed from execute queue\n",
+				task->task_no);
+			spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+			continue;
+		}
+
+		/*
+		 * If the se_task_t is active, sleep until it is returned
+		 * from the plugin.
+		 */
+		if (atomic_read(&task->task_active)) {
+			atomic_set(&task->task_stop, 1);
+			spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock,
+					flags);
+
+			DEBUG_TS("task_no[%d] - Waiting to complete\n",
+				task->task_no);
+			down(&task->task_stop_sem);
+			DEBUG_TS("task_no[%d] - Stopped successfully\n",
+				task->task_no);
+
+			spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+			atomic_dec(&T_TASK(cmd)->t_task_cdbs_left);
+
+			atomic_set(&task->task_active, 0);
+			atomic_set(&task->task_stop, 0);
+		} else {
+			DEBUG_TS("task_no[%d] - Did nothing\n", task->task_no);
+		}
+
+		__transport_stop_task_timer(task, &flags);
+	}
+	spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+}
+
+static void transport_failure_reset_queue_depth(se_device_t *dev)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&SE_HBA(dev)->hba_queue_lock, flags);;
+	atomic_inc(&dev->depth_left);
+	atomic_inc(&SE_HBA(dev)->left_queue_depth);
+	spin_unlock_irqrestore(&SE_HBA(dev)->hba_queue_lock, flags);
+}
+
+/*	transport_generic_request_failure():
+ *
+ *	Handle SAM-esque emulation for generic transport request failures.
+ */
+void transport_generic_request_failure(
+	se_cmd_t *cmd,
+	se_device_t *dev,
+	int complete,
+	int sc)
+{
+	DEBUG_GRF("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x"
+		" CDB: 0x%02x\n", cmd, CMD_TFO(cmd)->get_task_tag(cmd),
+		T_TASK(cmd)->t_task_cdb[0]);
+	DEBUG_GRF("-----[ se_obj_api: %p se_obj_ptr: %p\n", cmd->se_obj_api,
+		cmd->se_obj_ptr);
+	DEBUG_GRF("-----[ se_orig_obj_api: %p se_orig_obj_ptr: %p\n",
+		cmd->se_orig_obj_api, cmd->se_orig_obj_ptr);
+	DEBUG_GRF("-----[ i_state/def_i_state: %d/%d t_state/def_t_state:"
+		" %d/%d transport_error_status: %d\n",
+		CMD_TFO(cmd)->get_cmd_state(cmd), cmd->deferred_i_state,
+		cmd->t_state, cmd->deferred_t_state,
+		cmd->transport_error_status);
+	DEBUG_GRF("-----[ t_task_cdbs: %d t_task_cdbs_left: %d"
+		" t_task_cdbs_sent: %d t_task_cdbs_ex_left: %d --"
+		" t_transport_active: %d t_transport_stop: %d"
+		" t_transport_sent: %d\n", T_TASK(cmd)->t_task_cdbs,
+		atomic_read(&T_TASK(cmd)->t_task_cdbs_left),
+		atomic_read(&T_TASK(cmd)->t_task_cdbs_sent),
+		atomic_read(&T_TASK(cmd)->t_task_cdbs_ex_left),
+		atomic_read(&T_TASK(cmd)->t_transport_active),
+		atomic_read(&T_TASK(cmd)->t_transport_stop),
+		atomic_read(&T_TASK(cmd)->t_transport_sent));
+
+	transport_stop_all_task_timers(cmd);
+
+	if (dev)
+		transport_failure_reset_queue_depth(dev);
+
+	if (complete) {
+		transport_direct_request_timeout(cmd);
+		cmd->transport_error_status =
+			PYX_TRANSPORT_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+	}
+
+	switch (cmd->transport_error_status) {
+	case PYX_TRANSPORT_UNKNOWN_SAM_OPCODE:
+		cmd->scsi_sense_reason = UNSUPPORTED_SCSI_OPCODE;
+		break;
+	case PYX_TRANSPORT_REQ_TOO_MANY_SECTORS:
+		cmd->scsi_sense_reason = SECTOR_COUNT_TOO_MANY;
+		break;
+	case PYX_TRANSPORT_INVALID_CDB_FIELD:
+		cmd->scsi_sense_reason = INVALID_CDB_FIELD;
+		break;
+	case PYX_TRANSPORT_INVALID_PARAMETER_LIST:
+		cmd->scsi_sense_reason = INVALID_PARAMETER_LIST;
+		break;
+	case PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES:
+		if (!(cmd->se_cmd_flags & SCF_CMD_PASSTHROUGH)) {
+			if (!sc)
+				transport_new_cmd_failure(cmd);
+			/*
+			 * Currently for PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES,
+			 * we force this session to fall back to session
+			 * recovery.
+			 */
+			CMD_TFO(cmd)->fall_back_to_erl0(cmd->se_sess);
+			CMD_TFO(cmd)->stop_session(cmd->se_sess, 0, 0);
+
+			goto check_stop;
+		} else {
+			cmd->scsi_sense_reason =
+				LOGICAL_UNIT_COMMUNICATION_FAILURE;
+		}
+		break;
+	case PYX_TRANSPORT_LOGICAL_UNIT_COMMUNICATION_FAILURE:
+		cmd->scsi_sense_reason = LOGICAL_UNIT_COMMUNICATION_FAILURE;
+		break;
+	case PYX_TRANSPORT_UNKNOWN_MODE_PAGE:
+		cmd->scsi_sense_reason = UNKNOWN_MODE_PAGE;
+		break;
+	case PYX_TRANSPORT_WRITE_PROTECTED:
+		cmd->scsi_sense_reason = WRITE_PROTECTED;
+		break;
+	case PYX_TRANSPORT_RESERVATION_CONFLICT:
+		/*
+		 * No SENSE Data payload for this case, set SCSI Status
+		 * and queue the response to $FABRIC_MOD.
+		 *
+		 * Uses linux/include/scsi/scsi.h SAM status codes defs
+		 */
+		cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT;
+		/*
+		 * For UA Interlock Code 11b, a RESERVATION CONFLICT will
+		 * establish a UNIT ATTENTION with PREVIOUS RESERVATION
+		 * CONFLICT STATUS.
+		 *
+		 * See spc4r17, section 7.4.6 Control Mode Page, Table 349
+		 */
+		if (SE_SESS(cmd) &&
+		    DEV_ATTRIB(cmd->se_dev)->emulate_ua_intlck_ctrl == 2)
+			core_scsi3_ua_allocate(SE_SESS(cmd)->se_node_acl,
+				cmd->orig_fe_lun, 0x2C,
+				ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS);
+
+		if (!(cmd->se_cmd_flags & SCF_CMD_PASSTHROUGH))
+			CMD_TFO(cmd)->queue_status(cmd);
+
+		goto check_stop;
+	default:
+		printk(KERN_ERR "Unknown transport error for CDB 0x%02x: %d\n",
+			T_TASK(cmd)->t_task_cdb[0],
+			cmd->transport_error_status);
+		cmd->scsi_sense_reason = UNSUPPORTED_SCSI_OPCODE;
+		break;
+	}
+
+	if (!sc)
+		transport_new_cmd_failure(cmd);
+	else
+		transport_send_check_condition_and_sense(cmd,
+			cmd->scsi_sense_reason, 0);
+check_stop:
+	transport_lun_remove_cmd(cmd);
+	if (!(transport_cmd_check_stop(cmd, 2, 0)))
+		transport_passthrough_check_stop(cmd);
+}
+
+void transport_direct_request_timeout(se_cmd_t *cmd)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+	if (!(atomic_read(&T_TASK(cmd)->t_transport_timeout))) {
+		spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+		return;
+	}
+	if (atomic_read(&T_TASK(cmd)->t_task_cdbs_timeout_left)) {
+		spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+		return;
+	}
+
+	atomic_sub(atomic_read(&T_TASK(cmd)->t_transport_timeout),
+		   &T_TASK(cmd)->t_se_count);
+	spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+}
+
+void transport_generic_request_timeout(se_cmd_t *cmd)
+{
+	unsigned long flags;
+
+	/*
+	 * Reset T_TASK(cmd)->t_se_count to allow transport_generic_remove()
+	 * to allow last call to free memory resources.
+	 */
+	spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+	if (atomic_read(&T_TASK(cmd)->t_transport_timeout) > 1) {
+		int tmp = (atomic_read(&T_TASK(cmd)->t_transport_timeout) - 1);
+
+		atomic_sub(tmp, &T_TASK(cmd)->t_se_count);
+	}
+	spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+	transport_generic_remove(cmd, 0, 0);
+}
+
+/* #define iscsi_linux_calculate_map_segment_DEBUG */
+#ifdef iscsi_linux_calculate_map_segment_DEBUG
+#define DEBUG_MAP_SEGMENTS(buf...) PYXPRINT(buf)
+#else
+#define DEBUG_MAP_SEGMENTS(buf...)
+#endif
+
+/*	transport_calculate_map_segment():
+ *
+ *
+ */
+static inline void transport_calculate_map_segment(
+	u32 *data_length,
+	se_offset_map_t *lm)
+{
+	u32 sg_offset = 0;
+	se_mem_t *se_mem = lm->map_se_mem;
+
+	DEBUG_MAP_SEGMENTS(" START Mapping se_mem: %p, Length: %d"
+		"  Remaining iSCSI Data: %u\n", se_mem, se_mem->se_len,
+		*data_length);
+	/*
+	 * Still working on pages in the current se_mem_t.
+	 */
+	if (!lm->map_reset) {
+		lm->iovec_length = (lm->sg_length > PAGE_SIZE) ?
+					PAGE_SIZE : lm->sg_length;
+		if (*data_length < lm->iovec_length) {
+			DEBUG_MAP_SEGMENTS("LINUX_MAP: Reset lm->iovec_length"
+				" to %d\n", *data_length);
+
+			lm->iovec_length = *data_length;
+		}
+		lm->iovec_base = page_address(lm->sg_page) + sg_offset;
+
+		DEBUG_MAP_SEGMENTS("LINUX_MAP: Set lm->iovec_base to %p from"
+			" lm->sg_page: %p\n", lm->iovec_base, lm->sg_page);
+		return;
+	}
+
+	/*
+	 * First run of an iscsi_linux_map_t.
+	 *
+	 * OR:
+	 *
+	 * Mapped all of the pages in the current scatterlist, move
+	 * on to the next one.
+	 */
+	lm->map_reset = 0;
+	sg_offset = se_mem->se_off;
+	lm->sg_page = se_mem->se_page;
+	lm->sg_length = se_mem->se_len;
+
+	DEBUG_MAP_SEGMENTS("LINUX_MAP1[%p]: Starting to se_mem->se_len: %u,"
+		" se_mem->se_off: %u, se_mem->se_page: %p\n", se_mem,
+		se_mem->se_len, se_mem->se_off, se_mem->se_page);;
+	/*
+	 * Get the base and length of the current page for use with the iovec.
+	 */
+recalc:
+	lm->iovec_length = (lm->sg_length > (PAGE_SIZE - sg_offset)) ?
+			   (PAGE_SIZE - sg_offset) : lm->sg_length;
+
+	DEBUG_MAP_SEGMENTS("LINUX_MAP: lm->iovec_length: %u, lm->sg_length: %u,"
+		" sg_offset: %u\n", lm->iovec_length, lm->sg_length, sg_offset);
+	/*
+	 * See if there is any iSCSI offset we need to deal with.
+	 */
+	if (!lm->current_offset) {
+		lm->iovec_base = page_address(lm->sg_page) + sg_offset;
+
+		if (*data_length < lm->iovec_length) {
+			DEBUG_MAP_SEGMENTS("LINUX_MAP1[%p]: Reset"
+				" lm->iovec_length to %d\n", se_mem,
+				*data_length);
+			lm->iovec_length = *data_length;
+		}
+
+		DEBUG_MAP_SEGMENTS("LINUX_MAP2[%p]: No current_offset,"
+			" set iovec_base to %p and set Current Page to %p\n",
+			se_mem, lm->iovec_base, lm->sg_page);
+
+		return;
+	}
+
+	/*
+	 * We know the iSCSI offset is in the next page of the current
+	 * scatterlist.  Increase the lm->sg_page pointer and try again.
+	 */
+	if (lm->current_offset >= lm->iovec_length) {
+		DEBUG_MAP_SEGMENTS("LINUX_MAP3[%p]: Next Page:"
+			" lm->current_offset: %u, iovec_length: %u"
+			" sg_offset: %u\n", se_mem, lm->current_offset,
+			lm->iovec_length, sg_offset);
+
+		lm->current_offset -= lm->iovec_length;
+		lm->sg_length -= lm->iovec_length;
+		lm->sg_page++;
+		sg_offset = 0;
+
+		DEBUG_MAP_SEGMENTS("LINUX_MAP3[%p]: ** Skipping to Next Page,"
+			" updated values: lm->current_offset: %u\n", se_mem,
+			lm->current_offset);
+
+		goto recalc;
+	}
+
+	/*
+	 * The iSCSI offset is in the current page, increment the iovec
+	 * base and reduce iovec length.
+	 */
+	lm->iovec_base = page_address(lm->sg_page);
+
+	DEBUG_MAP_SEGMENTS("LINUX_MAP4[%p]: Set lm->iovec_base to %p\n", se_mem,
+			lm->iovec_base);
+
+	lm->iovec_base += sg_offset;
+	lm->iovec_base += lm->current_offset;
+	DEBUG_MAP_SEGMENTS("****** the OLD lm->iovec_length: %u lm->sg_length:"
+		" %u\n", lm->iovec_length, lm->sg_length);
+
+	if ((lm->iovec_length - lm->current_offset) < *data_length)
+		lm->iovec_length -= lm->current_offset;
+	else
+		lm->iovec_length = *data_length;
+
+	if ((lm->sg_length - lm->current_offset) < *data_length)
+		lm->sg_length -= lm->current_offset;
+	else
+		lm->sg_length = *data_length;
+
+	lm->current_offset = 0;
+
+	DEBUG_MAP_SEGMENTS("****** the NEW lm->iovec_length %u lm->sg_length:"
+		" %u\n", lm->iovec_length, lm->sg_length);
+}
+
+/* #define iscsi_linux_get_iscsi_offset_DEBUG */
+#ifdef iscsi_linux_get_iscsi_offset_DEBUG
+#define DEBUG_GET_ISCSI_OFFSET(buf...) PYXPRINT(buf)
+#else
+#define DEBUG_GET_ISCSI_OFFSET(buf...)
+#endif
+
+/*	transport_get_iscsi_offset():
+ *
+ *
+ */
+static int transport_get_iscsi_offset(
+	se_offset_map_t *lmap,
+	se_unmap_sg_t *usg)
+{
+	u32 current_length = 0, current_iscsi_offset = lmap->iscsi_offset;
+	u32 total_offset = 0;
+	se_cmd_t *cmd = usg->se_cmd;
+	se_mem_t *se_mem;
+
+	list_for_each_entry(se_mem, T_TASK(cmd)->t_mem_list, se_list)
+		break;
+
+	if (!se_mem) {
+		printk(KERN_ERR "Unable to locate se_mem from"
+				" T_TASK(cmd)->t_mem_list\n");
+		return -1;
+	}
+
+	/*
+	 * Locate the current offset from the passed iSCSI Offset.
+	 */
+	while (lmap->iscsi_offset != current_length) {
+		/*
+		 * The iSCSI Offset is within the current se_mem_t.
+		 *
+		 * Or:
+		 *
+		 * The iSCSI Offset is outside of the current se_mem_t.
+		 * Recalculate the values and obtain the next se_mem_t pointer.
+		 */
+		total_offset += se_mem->se_len;
+
+		DEBUG_GET_ISCSI_OFFSET("ISCSI_OFFSET: current_length: %u,"
+			" total_offset: %u, sg->length: %u\n",
+			current_length, total_offset, se_mem->se_len);
+
+		if (total_offset > lmap->iscsi_offset) {
+			current_length += current_iscsi_offset;
+			lmap->orig_offset = lmap->current_offset =
+				usg->t_offset = current_iscsi_offset;
+			DEBUG_GET_ISCSI_OFFSET("ISCSI_OFFSET: Within Current"
+				" se_mem_t: %p, current_length incremented to"
+				" %u\n", se_mem, current_length);
+		} else {
+			current_length += se_mem->se_len;
+			current_iscsi_offset -= se_mem->se_len;
+
+			DEBUG_GET_ISCSI_OFFSET("ISCSI_OFFSET: Outside of"
+				" Current se_mem: %p, current_length"
+				" incremented to %u and current_iscsi_offset"
+				" decremented to %u\n", se_mem, current_length,
+				current_iscsi_offset);
+
+			list_for_each_entry_continue(se_mem,
+					T_TASK(cmd)->t_mem_list, se_list)
+				break;
+
+			if (!se_mem) {
+				printk(KERN_ERR "Unable to locate se_mem_t\n");
+				return -1;
+			}
+		}
+	}
+	lmap->map_orig_se_mem = se_mem;
+	usg->cur_se_mem = se_mem;
+
+	return 0;
+}
+
+/* #define iscsi_OS_set_SG_iovec_ptrs_DEBUG */
+#ifdef iscsi_OS_set_SG_iovec_ptrs_DEBUG
+#define DEBUG_IOVEC_SCATTERLISTS(buf...) PYXPRINT(buf)
+
+static void iscsi_check_iovec_map(
+	u32 iovec_count,
+	u32 map_length,
+	se_map_sg_t *map_sg,
+	se_unmap_sg_t *unmap_sg)
+{
+	u32 i, iovec_map_length = 0;
+	se_cmd_t *cmd = map_sg->se_cmd;
+	struct iovec *iov = map_sg->iov;
+	se_mem_t *se_mem;
+
+	for (i = 0; i < iovec_count; i++)
+		iovec_map_length += iov[i].iov_len;
+
+	if (iovec_map_length == map_length)
+		return;
+
+	printk(KERN_INFO "Calculated iovec_map_length: %u does not match passed"
+		" map_length: %u\n", iovec_map_length, map_length);
+	printk(KERN_INFO "ITT: 0x%08x data_length: %u data_direction %d\n",
+		CMD_TFO(cmd)->get_task_tag(cmd), cmd->data_length,
+		cmd->data_direction);
+
+	iovec_map_length = 0;
+
+	for (i = 0; i < iovec_count; i++) {
+		printk(KERN_INFO "iov[%d].iov_[base,len]: %p / %u bytes------"
+			"-->\n", i, iov[i].iov_base, iov[i].iov_len);
+
+		printk(KERN_INFO "iovec_map_length from %u to %u\n",
+			iovec_map_length, iovec_map_length + iov[i].iov_len);
+		iovec_map_length += iov[i].iov_len;
+
+		printk(KERN_INFO "XXXX_map_length from %u to %u\n", map_length,
+				(map_length - iov[i].iov_len));
+		map_length -= iov[i].iov_len;
+	}
+
+	list_for_each_entry(se_mem, T_TASK(cmd)->t_mem_list, se_list) {
+		printk(KERN_INFO "se_mem[%p]: offset: %u length: %u\n",
+			se_mem, se_mem->se_off, se_mem->se_len);
+	}
+
+	BUG();
+}
+
+#else
+#define DEBUG_IOVEC_SCATTERLISTS(buf...)
+#define iscsi_check_iovec_map(a, b, c, d)
+#endif
+
+/*	transport_generic_set_iovec_ptrs():
+ *
+ *
+ */
+static int transport_generic_set_iovec_ptrs(
+	se_map_sg_t *map_sg,
+	se_unmap_sg_t *unmap_sg)
+{
+	u32 i = 0 /* For iovecs */, j = 0 /* For scatterlists */;
+#ifdef iscsi_OS_set_SG_iovec_ptrs_DEBUG
+	u32 orig_map_length = map_sg->data_length;
+#endif
+	se_cmd_t *cmd = map_sg->se_cmd;
+	se_offset_map_t *lmap = &unmap_sg->lmap;
+	struct iovec *iov = map_sg->iov;
+
+	/*
+	 * Used for non scatterlist operations, assume a single iovec.
+	 */
+	if (!T_TASK(cmd)->t_task_se_num) {
+		DEBUG_IOVEC_SCATTERLISTS("ITT: 0x%08x No se_mem_t elements"
+			" present\n", CMD_TFO(cmd)->get_task_tag(cmd));
+		iov[0].iov_base = (unsigned char *) T_TASK(cmd)->t_task_buf +
+							map_sg->data_offset;
+		iov[0].iov_len  = map_sg->data_length;
+		return 1;
+	}
+
+	/*
+	 * Set lmap->map_reset = 1 so the first call to
+	 * transport_calculate_map_segment() sets up the initial
+	 * values for se_offset_map_t.
+	 */
+	lmap->map_reset = 1;
+
+	DEBUG_IOVEC_SCATTERLISTS("[-------------------] ITT: 0x%08x OS"
+		" Independent Network POSIX defined iovectors to SE Memory"
+		" [-------------------]\n\n", CMD_TFO(cmd)->get_task_tag(cmd));
+
+	/*
+	 * Get a pointer to the first used scatterlist based on the passed
+	 * offset. Also set the rest of the needed values in iscsi_linux_map_t.
+	 */
+	lmap->iscsi_offset = map_sg->data_offset;
+	if (map_sg->map_flags & MAP_SG_KMAP) {
+		unmap_sg->se_cmd = map_sg->se_cmd;
+		transport_get_iscsi_offset(lmap, unmap_sg);
+		unmap_sg->data_length = map_sg->data_length;
+	} else {
+		lmap->current_offset = lmap->orig_offset;
+	}
+	lmap->map_se_mem = lmap->map_orig_se_mem;
+
+	DEBUG_IOVEC_SCATTERLISTS("OS_IOVEC: Total map_sg->data_length: %d,"
+		" lmap->iscsi_offset: %d, cmd->orig_iov_data_count: %d\n",
+		map_sg->data_length, lmap->iscsi_offset,
+		cmd->orig_iov_data_count);
+
+	while (map_sg->data_length) {
+		/*
+		 * Time to get the virtual address for use with iovec pointers.
+		 * This function will return the expected iovec_base address
+		 * and iovec_length.
+		 */
+		transport_calculate_map_segment(&map_sg->data_length, lmap);
+
+		/*
+		 * Set the iov.iov_base and iov.iov_len from the current values
+		 * in iscsi_linux_map_t.
+		 */
+		iov[i].iov_base = lmap->iovec_base;
+		iov[i].iov_len = lmap->iovec_length;
+
+		/*
+		 * Subtract the final iovec length from the total length to be
+		 * mapped, and the length of the current scatterlist.  Also
+		 * perform the paranoid check to make sure we are not going to
+		 * overflow the iovecs allocated for this command in the next
+		 * pass.
+		 */
+		map_sg->data_length -= iov[i].iov_len;
+		lmap->sg_length -= iov[i].iov_len;
+
+		DEBUG_IOVEC_SCATTERLISTS("OS_IOVEC: iov[%u].iov_len: %u\n",
+				i, iov[i].iov_len);
+		DEBUG_IOVEC_SCATTERLISTS("OS_IOVEC: lmap->sg_length: from %u"
+			" to %u\n", lmap->sg_length + iov[i].iov_len,
+				lmap->sg_length);
+		DEBUG_IOVEC_SCATTERLISTS("OS_IOVEC: Changed total"
+			" map_sg->data_length from %u to %u\n",
+			map_sg->data_length + iov[i].iov_len,
+			map_sg->data_length);
+
+		if ((++i + 1) > cmd->orig_iov_data_count) {
+			printk(KERN_ERR "Current iovec count %u is greater than"
+				" se_cmd_t->orig_data_iov_count %u, cannot"
+				" continue.\n", i+1, cmd->orig_iov_data_count);
+			return -1;
+		}
+
+		/*
+		 * All done mapping this scatterlist's pages, move on to
+		 * the next scatterlist by setting lmap.map_reset = 1;
+		 */
+		if (!lmap->sg_length || !map_sg->data_length) {
+			list_for_each_entry(lmap->map_se_mem,
+					&lmap->map_se_mem->se_list, se_list)
+				break;
+
+			if (!lmap->map_se_mem) {
+				printk(KERN_ERR "Unable to locate next"
+					" lmap->map_se_mem_t entry\n");
+				return -1;
+			}
+			j++;
+
+			lmap->sg_page = NULL;
+			lmap->map_reset = 1;
+
+			DEBUG_IOVEC_SCATTERLISTS("OS_IOVEC: Done with current"
+				" scatterlist, incremented Generic scatterlist"
+				" Counter to %d and reset = 1\n", j);
+		} else
+			lmap->sg_page++;
+	}
+
+	unmap_sg->sg_count = j;
+
+	iscsi_check_iovec_map(i, orig_map_length, map_sg, unmap_sg);
+
+	return i;
+}
+
+/*	transport_generic_allocate_buf():
+ *
+ *	Called from transport_generic_new_cmd() in Transport Processing Thread.
+ */
+int transport_generic_allocate_buf(
+	se_cmd_t *cmd,
+	u32 data_length,
+	u32 dma_size)
+{
+	unsigned char *buf;
+
+	buf = kzalloc(data_length, GFP_KERNEL);
+	if (!(buf)) {
+		printk(KERN_ERR "Unable to allocate memory for buffer\n");
+		return -1;
+	}
+
+	T_TASK(cmd)->t_task_se_num = 0;
+	T_TASK(cmd)->t_task_buf = buf;
+
+	return 0;
+}
+
+/*	transport_generic_allocate_none():
+ *
+ *
+ */
+static int transport_generic_allocate_none(
+	se_cmd_t *cmd,
+	u32 data_length,
+	u32 dma_size)
+{
+	return 0;
+}
+
+/*	transport_generic_map_SG_segments():
+ *
+ *
+ */
+static void transport_generic_map_SG_segments(se_unmap_sg_t *unmap_sg)
+{
+	u32 i = 0;
+	se_cmd_t *cmd = unmap_sg->se_cmd;
+	se_mem_t *se_mem = unmap_sg->cur_se_mem;
+
+	if (!(T_TASK(cmd)->t_task_se_num))
+		return;
+
+	list_for_each_entry_continue(se_mem, T_TASK(cmd)->t_mem_list, se_list) {
+		kmap(se_mem->se_page);
+
+		if (++i == unmap_sg->sg_count)
+			break;
+	}
+}
+
+/*	transport_generic_unmap_SG_segments():
+ *
+ *
+ */
+static void transport_generic_unmap_SG_segments(se_unmap_sg_t *unmap_sg)
+{
+	u32 i = 0;
+	se_cmd_t *cmd = unmap_sg->se_cmd;
+	se_mem_t *se_mem = unmap_sg->cur_se_mem;
+
+	if (!(T_TASK(cmd)->t_task_se_num))
+		return;
+
+	list_for_each_entry_continue(se_mem, T_TASK(cmd)->t_mem_list, se_list) {
+		kunmap(se_mem->se_page);
+
+		if (++i == unmap_sg->sg_count)
+			break;
+	}
+
+	return;
+}
+
+static inline u32 transport_lba_21(unsigned char *cdb)
+{
+	return ((cdb[1] & 0x1f) << 16) | (cdb[2] << 8) | cdb[3];
+}
+
+static inline u32 transport_lba_32(unsigned char *cdb)
+{
+	return (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5];
+}
+
+static inline unsigned long long transport_lba_64(unsigned char *cdb)
+{
+	unsigned int __v1, __v2;
+
+	__v1 = (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5];
+	__v2 = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
+
+	return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32;
+}
+
+/*	transport_set_supported_SAM_opcode():
+ *
+ *
+ */
+void transport_set_supported_SAM_opcode(se_cmd_t *se_cmd)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&T_TASK(se_cmd)->t_state_lock, flags);
+	se_cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE;
+	spin_unlock_irqrestore(&T_TASK(se_cmd)->t_state_lock, flags);
+}
+
+/*
+ * Called from interrupt context.
+ */
+void transport_task_timeout_handler(unsigned long data)
+{
+	se_task_t *task = (se_task_t *)data;
+	se_cmd_t *cmd = TASK_CMD(task);
+	unsigned long flags;
+
+	DEBUG_TT("transport task timeout fired! task: %p cmd: %p\n", task, cmd);
+
+	spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+	if (task->task_flags & TF_STOP) {
+		spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+		return;
+	}
+	task->task_flags &= ~TF_RUNNING;
+
+	/*
+	 * Determine if transport_complete_task() has already been called.
+	 */
+	if (!(atomic_read(&task->task_active))) {
+		DEBUG_TT("transport task: %p cmd: %p timeout task_active"
+				" == 0\n", task, cmd);
+		spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+		return;
+	}
+
+	atomic_inc(&T_TASK(cmd)->t_se_count);
+	atomic_inc(&T_TASK(cmd)->t_transport_timeout);
+	T_TASK(cmd)->t_tasks_failed = 1;
+
+	atomic_set(&task->task_timeout, 1);
+	task->task_error_status = PYX_TRANSPORT_TASK_TIMEOUT;
+	task->task_scsi_status = 1;
+
+	if (atomic_read(&task->task_stop)) {
+		DEBUG_TT("transport task: %p cmd: %p timeout task_stop"
+				" == 1\n", task, cmd);
+		spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+		up(&task->task_stop_sem);
+		return;
+	}
+
+	if (!(atomic_dec_and_test(&T_TASK(cmd)->t_task_cdbs_left))) {
+		DEBUG_TT("transport task: %p cmd: %p timeout non zero"
+				" t_task_cdbs_left\n", task, cmd);
+		spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+		return;
+	}
+	DEBUG_TT("transport task: %p cmd: %p timeout ZERO t_task_cdbs_left\n",
+			task, cmd);
+
+	cmd->t_state = TRANSPORT_COMPLETE_FAILURE;
+	spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+	cmd->transport_add_cmd_to_queue(cmd, TRANSPORT_COMPLETE_FAILURE);
+}
+
+u32 transport_get_default_task_timeout(se_device_t *dev)
+{
+	if (TRANSPORT(dev)->get_device_type(dev) == TYPE_DISK)
+		return TRANSPORT_TIMEOUT_TYPE_DISK;
+
+	if (TRANSPORT(dev)->get_device_type(dev) == TYPE_ROM)
+		return TRANSPORT_TIMEOUT_TYPE_ROM;
+
+	if (TRANSPORT(dev)->get_device_type(dev) == TYPE_TAPE)
+		return TRANSPORT_TIMEOUT_TYPE_TAPE;
+
+	return TRANSPORT_TIMEOUT_TYPE_OTHER;
+}
+EXPORT_SYMBOL(transport_get_default_task_timeout);
+
+/*
+ * Called with T_TASK(cmd)->t_state_lock held.
+ */
+void transport_start_task_timer(se_task_t *task)
+{
+	int timeout;
+
+	if (task->task_flags & TF_RUNNING)
+		return;
+	/*
+	 * If the task_timeout is disabled, exit now.
+	 */
+	timeout = task->se_obj_api->get_task_timeout(task->se_obj_ptr);
+	if (!(timeout))
+		return;
+
+	init_timer(&task->task_timer);
+	task->task_timer.expires = (get_jiffies_64() + timeout * HZ);
+	task->task_timer.data = (unsigned long) task;
+	task->task_timer.function = transport_task_timeout_handler;
+
+	task->task_flags |= TF_RUNNING;
+	add_timer(&task->task_timer);
+#if 0
+	printk(KERN_INFO "Starting task timer for cmd: %p task: %p seconds:"
+		" %d\n", task->task_se_cmd, task, timeout);
+#endif
+}
+
+/*
+ * Called with spin_lock_irq(&T_TASK(cmd)->t_state_lock) held.
+ */
+void __transport_stop_task_timer(se_task_t *task, unsigned long *flags)
+{
+	se_cmd_t *cmd = TASK_CMD(task);
+
+	if (!(task->task_flags & TF_RUNNING))
+		return;
+
+	task->task_flags |= TF_STOP;
+	spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, *flags);
+
+	del_timer_sync(&task->task_timer);
+
+	spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, *flags);
+	task->task_flags &= ~TF_RUNNING;
+	task->task_flags &= ~TF_STOP;
+}
+
+void transport_stop_task_timer(se_task_t *task)
+{
+	se_cmd_t *cmd = TASK_CMD(task);
+	unsigned long flags;
+#if 0
+	printk(KERN_INFO "Stopping task timer for cmd: %p task: %p\n",
+			cmd, task);
+#endif
+	spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+	if (!(task->task_flags & TF_RUNNING)) {
+		spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+		return;
+	}
+	task->task_flags |= TF_STOP;
+	spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+	del_timer_sync(&task->task_timer);
+
+	spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+	task->task_flags &= ~TF_RUNNING;
+	task->task_flags &= ~TF_STOP;
+	spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+}
+
+void transport_stop_all_task_timers(se_cmd_t *cmd)
+{
+	se_task_t *task = NULL, *task_tmp;
+	unsigned long flags;
+
+	spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+	list_for_each_entry_safe(task, task_tmp,
+				&T_TASK(cmd)->t_task_list, t_list)
+		__transport_stop_task_timer(task, &flags);
+	spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+}
+
+static inline int transport_tcq_window_closed(se_device_t *dev)
+{
+	if (dev->dev_tcq_window_closed++ <
+			PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD) {
+		msleep(PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT);
+	} else
+		msleep(PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG);
+
+	wake_up_interruptible(&dev->dev_queue_obj->thread_wq);
+	return 0;
+}
+
+int transport_execute_tasks(se_cmd_t *cmd)
+{
+	if (!(cmd->se_cmd_flags & SCF_SE_DISABLE_ONLINE_CHECK)) {
+		if (CMD_ORIG_OBJ_API(cmd)->check_online(
+					cmd->se_orig_obj_ptr) != 0) {
+			cmd->transport_error_status =
+			PYX_TRANSPORT_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+			transport_generic_request_failure(cmd, NULL, 0, 1);
+			return 0;
+		}
+	}
+	/*
+	 * Add the task(s) built for the passed se_cmd_t to the
+	 * execution queue for this se_device_t.
+	 */
+	if (!transport_cmd_check_stop(cmd, 0, TRANSPORT_PROCESSING))
+		CMD_ORIG_OBJ_API(cmd)->add_tasks(cmd->se_orig_obj_ptr, cmd);
+
+	CMD_ORIG_OBJ_API(cmd)->execute_tasks(cmd->se_orig_obj_ptr);
+
+	return 0;
+}
+
+int __transport_execute_tasks(se_device_t *dev)
+{
+	int error;
+	se_cmd_t *cmd = NULL;
+	se_task_t *task;
+	unsigned long flags;
+
+	/*
+	 * Check if there is enough room in the device and HBA queue to send
+	 * se_transport_task_t's to the selected transport.
+	 */
+check_depth:
+	spin_lock_irqsave(&SE_HBA(dev)->hba_queue_lock, flags);
+	if (!(atomic_read(&dev->depth_left)) ||
+	    !(atomic_read(&SE_HBA(dev)->left_queue_depth))) {
+		spin_unlock_irqrestore(&SE_HBA(dev)->hba_queue_lock, flags);
+		return transport_tcq_window_closed(dev);
+	}
+	dev->dev_tcq_window_closed = 0;
+
+	spin_lock(&dev->execute_task_lock);
+	task = transport_get_task_from_execute_queue(dev);
+	spin_unlock(&dev->execute_task_lock);
+
+	if (!task) {
+		spin_unlock_irqrestore(&SE_HBA(dev)->hba_queue_lock, flags);
+		return 0;
+	}
+
+	atomic_dec(&dev->depth_left);
+	atomic_dec(&SE_HBA(dev)->left_queue_depth);
+	spin_unlock_irqrestore(&SE_HBA(dev)->hba_queue_lock, flags);
+
+	cmd = TASK_CMD(task);
+
+	spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+	atomic_set(&task->task_active, 1);
+	atomic_set(&task->task_sent, 1);
+	atomic_inc(&T_TASK(cmd)->t_task_cdbs_sent);
+
+	if (atomic_read(&T_TASK(cmd)->t_task_cdbs_sent) ==
+	    T_TASK(cmd)->t_task_cdbs)
+		atomic_set(&cmd->transport_sent, 1);
+
+	transport_start_task_timer(task);
+	spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+	/*
+	 * The se_cmd_t->transport_emulate_cdb() function pointer is used
+	 * to grab REPORT_LUNS CDBs before they hit the
+	 * se_subsystem_api_t->do_task() caller below.
+	 */
+	if (cmd->transport_emulate_cdb) {
+		error = cmd->transport_emulate_cdb(cmd);
+		if (error != 0) {
+			cmd->transport_error_status = error;
+			atomic_set(&task->task_active, 0);
+			atomic_set(&cmd->transport_sent, 0);
+			transport_stop_tasks_for_cmd(cmd);
+			transport_generic_request_failure(cmd, dev, 0, 1);
+			goto check_depth;
+		}
+		/*
+		 * Handle the successful completion for transport_emulate_cdb()
+		 * usage.
+		 */
+		cmd->scsi_status = SAM_STAT_GOOD;
+		task->task_scsi_status = GOOD;
+		transport_complete_task(task, 1);
+	} else {
+		error = TRANSPORT(dev)->do_task(task);
+		if (error != 0) {
+			cmd->transport_error_status = error;
+			atomic_set(&task->task_active, 0);
+			atomic_set(&cmd->transport_sent, 0);
+			transport_stop_tasks_for_cmd(cmd);
+			transport_generic_request_failure(cmd, dev, 0, 1);
+		}
+	}
+
+	goto check_depth;
+
+	return 0;
+}
+
+/*	transport_new_cmd_failure():
+ *
+ *
+ */
+void transport_new_cmd_failure(se_cmd_t *se_cmd)
+{
+	unsigned long flags;
+	/*
+	 * Any unsolicited data will get dumped for failed command inside of
+	 * the fabric plugin
+	 */
+	spin_lock_irqsave(&T_TASK(se_cmd)->t_state_lock, flags);
+	se_cmd->se_cmd_flags |= SCF_SE_CMD_FAILED;
+	se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+	spin_unlock_irqrestore(&T_TASK(se_cmd)->t_state_lock, flags);
+
+	CMD_TFO(se_cmd)->new_cmd_failure(se_cmd);
+}
+
+static int transport_generic_map_buffers_to_tasks(se_cmd_t *);
+static void transport_nop_wait_for_tasks(se_cmd_t *, int, int);
+
+static inline u32 transport_get_sectors_6(
+	unsigned char *cdb,
+	se_cmd_t *cmd,
+	int *ret)
+{
+	se_device_t *dev = SE_LUN(cmd)->se_dev;
+
+	/*
+	 * Assume TYPE_DISK for non se_device_t objects.
+	 * Use 8-bit sector value.
+	 */
+	if (!dev)
+		goto type_disk;
+
+	/*
+	 * Use 24-bit allocation length for TYPE_TAPE.
+	 */
+	if (TRANSPORT(dev)->get_device_type(dev) == TYPE_TAPE)
+		return (u32)(cdb[2] << 16) + (cdb[3] << 8) + cdb[4];
+
+	/*
+	 * Everything else assume TYPE_DISK Sector CDB location.
+	 * Use 8-bit sector value.
+	 */
+type_disk:
+	return (u32)cdb[4];
+}
+
+static inline u32 transport_get_sectors_10(
+	unsigned char *cdb,
+	se_cmd_t *cmd,
+	int *ret)
+{
+	se_device_t *dev = SE_LUN(cmd)->se_dev;
+
+	/*
+	 * Assume TYPE_DISK for non se_device_t objects.
+	 * Use 16-bit sector value.
+	 */
+	if (!dev)
+		goto type_disk;
+
+	/*
+	 * XXX_10 is not defined in SSC, throw an exception
+	 */
+	if (TRANSPORT(dev)->get_device_type(dev) == TYPE_TAPE) {
+		*ret = -1;
+		return 0;
+	}
+
+	/*
+	 * Everything else assume TYPE_DISK Sector CDB location.
+	 * Use 16-bit sector value.
+	 */
+type_disk:
+	return (u32)(cdb[7] << 8) + cdb[8];
+}
+
+static inline u32 transport_get_sectors_12(
+	unsigned char *cdb,
+	se_cmd_t *cmd,
+	int *ret)
+{
+	se_device_t *dev = SE_LUN(cmd)->se_dev;
+
+	/*
+	 * Assume TYPE_DISK for non se_device_t objects.
+	 * Use 32-bit sector value.
+	 */
+	if (!dev)
+		goto type_disk;
+
+	/*
+	 * XXX_12 is not defined in SSC, throw an exception
+	 */
+	if (TRANSPORT(dev)->get_device_type(dev) == TYPE_TAPE) {
+		*ret = -1;
+		return 0;
+	}
+
+	/*
+	 * Everything else assume TYPE_DISK Sector CDB location.
+	 * Use 32-bit sector value.
+	 */
+type_disk:
+	return (u32)(cdb[6] << 24) + (cdb[7] << 16) + (cdb[8] << 8) + cdb[9];
+}
+
+static inline u32 transport_get_sectors_16(
+	unsigned char *cdb,
+	se_cmd_t *cmd,
+	int *ret)
+{
+	se_device_t *dev = SE_LUN(cmd)->se_dev;
+
+	/*
+	 * Assume TYPE_DISK for non se_device_t objects.
+	 * Use 32-bit sector value.
+	 */
+	if (!dev)
+		goto type_disk;
+
+	/*
+	 * Use 24-bit allocation length for TYPE_TAPE.
+	 */
+	if (TRANSPORT(dev)->get_device_type(dev) == TYPE_TAPE)
+		return (u32)(cdb[12] << 16) + (cdb[13] << 8) + cdb[14];
+
+type_disk:
+	return (u32)(cdb[10] << 24) + (cdb[11] << 16) +
+		    (cdb[12] << 8) + cdb[13];
+}
+
+static inline u32 transport_get_size(
+	u32 sectors,
+	unsigned char *cdb,
+	se_cmd_t *cmd)
+{
+	return CMD_ORIG_OBJ_API(cmd)->get_cdb_size(cmd->se_orig_obj_ptr,
+		sectors, cdb);
+}
+
+static inline void transport_get_maps(se_cmd_t *cmd)
+{
+	cmd->transport_map_SG_segments = &transport_generic_map_SG_segments;
+	cmd->transport_unmap_SG_segments = &transport_generic_unmap_SG_segments;
+}
+
+static unsigned char asciihex_to_binaryhex(unsigned char val[2])
+{
+	unsigned char result = 0;
+	/*
+	 * MSB
+	 */
+	if ((val[0] >= 'a') && (val[0] <= 'f'))
+		result = ((val[0] - 'a' + 10) & 0xf) << 4;
+	else
+		if ((val[0] >= 'A') && (val[0] <= 'F'))
+			result = ((val[0] - 'A' + 10) & 0xf) << 4;
+		else /* digit */
+			result = ((val[0] - '0') & 0xf) << 4;
+	/*
+	 * LSB
+	 */
+	if ((val[1] >= 'a') && (val[1] <= 'f'))
+		result |= ((val[1] - 'a' + 10) & 0xf);
+	else
+		if ((val[1] >= 'A') && (val[1] <= 'F'))
+			result |= ((val[1] - 'A' + 10) & 0xf);
+		else /* digit */
+			result |= ((val[1] - '0') & 0xf);
+
+	return result;
+}
+
+extern int transport_generic_emulate_inquiry(
+	se_cmd_t *cmd,
+	unsigned char type,
+	unsigned char *prod,
+	unsigned char *version,
+	unsigned char *se_location)
+{
+	se_device_t *dev = SE_DEV(cmd);
+	se_lun_t *lun = SE_LUN(cmd);
+	se_port_t *port = NULL;
+	se_portal_group_t *tpg = NULL;
+	t10_alua_lu_gp_member_t *lu_gp_mem;
+	t10_alua_tg_pt_gp_member_t *tg_pt_gp_mem;
+	unsigned char *buf = (unsigned char *) T_TASK(cmd)->t_task_buf;
+	unsigned char *cdb = T_TASK(cmd)->t_task_cdb;
+	unsigned char *iqn_sn, binary, binary_new;
+	u32 prod_len, iqn_sn_len, se_location_len;
+	u32 unit_serial_len, off = 0;
+	int i;
+	u16 len = 0, id_len;
+
+	/*
+	 * Make sure we at least have 8 bytes of INQUIRY response payload
+	 * going back.
+	 */
+	if (cmd->data_length < 8) {
+		printk(KERN_ERR "SCSI Inquiry payload length: %u too small\n",
+				cmd->data_length);
+		return -1;
+	}
+	buf[0] = type;
+
+	if (!(cdb[1] & 0x1)) {
+		if (type == TYPE_TAPE)
+			buf[1] = 0x80;
+		buf[2]          = TRANSPORT(dev)->get_device_rev(dev);
+		/*
+		 * Enable SCCS and TPGS fields for Emulated ALUA
+		 */
+		if (T10_ALUA(dev->se_sub_dev)->alua_type ==
+				SPC3_ALUA_EMULATED) {
+			/*
+			 * Set SCCS for MAINTENANCE_IN +
+			 * REPORT_TARGET_PORT_GROUPS
+			 */
+			buf[5]	= 0x80;
+			/*
+			 * Set TPGS field, see spc4r17 section 6.4.2 Table 135
+			 */
+			buf[5] |= TPGS_IMPLICT_ALUA;
+		}
+		buf[7]		= 0x32; /* Sync=1 and CmdQue=1 */
+		/*
+		 * Do not include vendor, product, reversion info in INQUIRY
+		 * response payload for cdbs with a small allocation length.
+		 */
+		if (cmd->data_length < 36) {
+			buf[4] = 3; /* Set additional length to 3 */
+			return 0;
+		}
+
+		snprintf((unsigned char *)&buf[8], 8, "LIO-ORG");
+		snprintf((unsigned char *)&buf[16], 16, "%s", prod);
+		snprintf((unsigned char *)&buf[32], 4, "%s", version);
+		buf[4] = 31; /* Set additional length to 31 */
+		return 0;
+	}
+
+	switch (cdb[2]) {
+	case 0x00: /* supported vital product data pages */
+		buf[1] = 0x00;
+		buf[3] = 3;
+		buf[4] = 0x0;
+		buf[5] = 0x80;
+		buf[6] = 0x83;
+		len = 3;
+		break;
+	case 0x80: /* unit serial number */
+		buf[1] = 0x80;
+		if (dev->se_sub_dev->su_dev_flags &
+					SDF_EMULATED_VPD_UNIT_SERIAL) {
+			unit_serial_len =
+				strlen(&DEV_T10_WWN(dev)->unit_serial[0]);
+			unit_serial_len++; /* For NULL Terminator */
+
+			if (((len + 4) + unit_serial_len) > cmd->data_length) {
+				len += unit_serial_len;
+				goto set_len;
+			}
+			len += sprintf((unsigned char *)&buf[4], "%s",
+				&DEV_T10_WWN(dev)->unit_serial[0]);
+		 } else {
+			iqn_sn = transport_get_iqn_sn();
+			iqn_sn_len = strlen(iqn_sn);
+			iqn_sn_len++; /* For ":" */
+			se_location_len = strlen(se_location);
+			se_location_len++; /* For NULL Terminator */
+
+			if (((len + 4) + (iqn_sn_len + se_location_len)) >
+					cmd->data_length) {
+				len += (iqn_sn_len + se_location_len);
+				goto set_len;
+			}
+			len += sprintf((unsigned char *)&buf[4], "%s:%s",
+				iqn_sn, se_location);
+		}
+		len++; /* Extra Byte for NULL Terminator */
+		buf[3] = len;
+		break;
+	case 0x83:
+		/*
+		 * Device identification VPD, for a complete list of
+		 * DESIGNATOR TYPEs see spc4r17 Table 459.
+		 */
+		buf[1] = 0x83;
+		off = 4;
+		/*
+		 * NAA IEEE Registered Extended Assigned designator format,
+		 * see spc4r17 section 7.7.3.6.5
+		 *
+		 * We depend upon a target_core_mod/ConfigFS provided
+		 * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial
+		 * value in order to return the NAA id.
+		 */
+		if (!(dev->se_sub_dev->su_dev_flags &
+					SDF_EMULATED_VPD_UNIT_SERIAL))
+			goto check_t10_vend_desc;
+		if ((off + 20) > cmd->data_length)
+			goto check_t10_vend_desc;
+		/* CODE SET == Binary */
+		buf[off++] = 0x1;
+		/* Set ASSOICATION == addressed logical unit: 0)b */
+		buf[off] = 0x00;
+		/* Identifier/Designator type == NAA identifier */
+		buf[off++] = 0x3;
+		off++;
+		/* Identifier/Designator length */
+		buf[off++] = 0x10;
+		/*
+		 * Start NAA IEEE Registered Extended Identifier/Designator
+		 */
+		buf[off++] = (0x6 << 4);
+		/*
+		 * Use OpenFabrics IEEE Company ID: 00 14 05
+		 */
+		buf[off++] = 0x01;
+		buf[off++] = 0x40;
+		buf[off] = (0x5 << 4);
+		/*
+		 * Return ConfigFS Unit Serial Number information for
+		 * VENDOR_SPECIFIC_IDENTIFIER and
+		 * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION
+		 */
+		binary = asciihex_to_binaryhex(
+					&DEV_T10_WWN(dev)->unit_serial[0]);
+		buf[off++] |= (binary & 0xf0) >> 4;
+		for (i = 0; i < 24; i += 2) {
+			binary_new = asciihex_to_binaryhex(
+				&DEV_T10_WWN(dev)->unit_serial[i+2]);
+			buf[off] = (binary & 0x0f) << 4;
+			buf[off++] |= (binary_new & 0xf0) >> 4;
+			binary = binary_new;
+		}
+		len = 20;
+		off = (len + 4);
+check_t10_vend_desc:
+		/*
+		 * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4
+		 */
+		id_len = 8; /* For Vendor field */
+		prod_len = 4; /* For VPD Header */
+		prod_len += 8; /* For Vendor field */
+		prod_len += strlen(prod);
+		prod_len++; /* For : */
+
+		if (dev->se_sub_dev->su_dev_flags &
+					SDF_EMULATED_VPD_UNIT_SERIAL) {
+			unit_serial_len =
+				strlen(&DEV_T10_WWN(dev)->unit_serial[0]);
+			unit_serial_len++; /* For NULL Terminator */
+
+			if ((len + (id_len + 4) +
+			    (prod_len + unit_serial_len)) >
+					cmd->data_length) {
+				len += (prod_len + unit_serial_len);
+				goto check_port;
+			}
+			id_len += sprintf((unsigned char *)&buf[off+12],
+					"%s:%s", prod,
+					&DEV_T10_WWN(dev)->unit_serial[0]);
+		} else {
+			iqn_sn = transport_get_iqn_sn();
+			iqn_sn_len = strlen(iqn_sn);
+			iqn_sn_len++; /* For ":" */
+			se_location_len = strlen(se_location);
+			se_location_len++; /* For NULL Terminator */
+
+			if ((len + (id_len + 4) + (prod_len + iqn_sn_len +
+					se_location_len)) > cmd->data_length) {
+				len += (prod_len + iqn_sn_len +
+						se_location_len);
+				goto check_port;
+			}
+			id_len += sprintf((unsigned char *)&buf[off+12],
+				"%s:%s:%s", prod, iqn_sn, se_location);
+		}
+		buf[off] = 0x2; /* ASCII */
+		buf[off+1] = 0x1; /* T10 Vendor ID */
+		buf[off+2] = 0x0;
+		memcpy((unsigned char *)&buf[off+4], "LIO-ORG", 8);
+		/* Extra Byte for NULL Terminator */
+		id_len++;
+		/* Identifier Length */
+		buf[off+3] = id_len;
+		/* Header size for Designation descriptor */
+		len += (id_len + 4);
+		off += (id_len + 4);
+		/*
+		 * se_port_t is only set for INQUIRY VPD=1 through $FABRIC_MOD
+		 */
+check_port:
+		port = lun->lun_sep;
+		if (port) {
+			t10_alua_lu_gp_t *lu_gp;
+			t10_alua_tg_pt_gp_t *tg_pt_gp;
+			u32 padding, scsi_name_len;
+			u16 lu_gp_id = 0;
+			u16 tg_pt_gp_id = 0;
+			u16 tpgt;
+
+			tpg = port->sep_tpg;
+			/*
+			 * Relative target port identifer, see spc4r17
+			 * section 7.7.3.7
+			 *
+			 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
+			 * section 7.5.1 Table 362
+			 */
+			if (((len + 4) + 8) > cmd->data_length) {
+				len += 8;
+				goto check_tpgi;
+			}
+			buf[off] =
+				(TPG_TFO(tpg)->get_fabric_proto_ident() << 4);
+			buf[off++] |= 0x1; /* CODE SET == Binary */
+			buf[off] = 0x80; /* Set PIV=1 */
+			/* Set ASSOICATION == target port: 01b */
+			buf[off] |= 0x10;
+			/* DESIGNATOR TYPE == Relative target port identifer */
+			buf[off++] |= 0x4;
+			off++; /* Skip over Reserved */
+			buf[off++] = 4; /* DESIGNATOR LENGTH */
+			/* Skip over Obsolete field in RTPI payload
+			 * in Table 472 */
+			off += 2;
+			buf[off++] = ((port->sep_rtpi >> 8) & 0xff);
+			buf[off++] = (port->sep_rtpi & 0xff);
+			len += 8; /* Header size + Designation descriptor */
+			/*
+			 * Target port group identifier, see spc4r17
+			 * section 7.7.3.8
+			 *
+			 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
+			 * section 7.5.1 Table 362
+			 */
+check_tpgi:
+			if (T10_ALUA(dev->se_sub_dev)->alua_type !=
+					SPC3_ALUA_EMULATED)
+				goto check_scsi_name;
+
+			if (((len + 4) + 8) > cmd->data_length) {
+				len += 8;
+				goto check_lu_gp;
+			}
+			tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
+			if (!(tg_pt_gp_mem))
+				goto check_lu_gp;
+
+			spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+			tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
+			if (!(tg_pt_gp)) {
+				spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+				goto check_lu_gp;
+			}
+			tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id;
+			spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+
+			buf[off] =
+				(TPG_TFO(tpg)->get_fabric_proto_ident() << 4);
+			buf[off++] |= 0x1; /* CODE SET == Binary */
+			buf[off] = 0x80; /* Set PIV=1 */
+			/* Set ASSOICATION == target port: 01b */
+			buf[off] |= 0x10;
+			/* DESIGNATOR TYPE == Target port group identifier */
+			buf[off++] |= 0x5;
+			off++; /* Skip over Reserved */
+			buf[off++] = 4; /* DESIGNATOR LENGTH */
+			off += 2; /* Skip over Reserved Field */
+			buf[off++] = ((tg_pt_gp_id >> 8) & 0xff);
+			buf[off++] = (tg_pt_gp_id & 0xff);
+			len += 8; /* Header size + Designation descriptor */
+			/*
+			 * Logical Unit Group identifier, see spc4r17
+			 * section 7.7.3.8
+			 */
+check_lu_gp:
+			if (((len + 4) + 8) > cmd->data_length) {
+				len += 8;
+				goto check_scsi_name;
+			}
+			lu_gp_mem = dev->dev_alua_lu_gp_mem;
+			if (!(lu_gp_mem))
+				goto check_scsi_name;
+
+			spin_lock(&lu_gp_mem->lu_gp_mem_lock);
+			lu_gp = lu_gp_mem->lu_gp;
+			if (!(lu_gp)) {
+				spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
+				goto check_scsi_name;
+			}
+			lu_gp_id = lu_gp->lu_gp_id;
+			spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
+
+			buf[off++] |= 0x1; /* CODE SET == Binary */
+			/* DESIGNATOR TYPE == Logical Unit Group identifier */
+			buf[off++] |= 0x6;
+			off++; /* Skip over Reserved */
+			buf[off++] = 4; /* DESIGNATOR LENGTH */
+			off += 2; /* Skip over Reserved Field */
+			buf[off++] = ((lu_gp_id >> 8) & 0xff);
+			buf[off++] = (lu_gp_id & 0xff);
+			len += 8; /* Header size + Designation descriptor */
+			/*
+			 * SCSI name string designator, see spc4r17
+			 * section 7.7.3.11
+			 *
+			 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
+			 * section 7.5.1 Table 362
+			 */
+check_scsi_name:
+			scsi_name_len = strlen(TPG_TFO(tpg)->tpg_get_wwn(tpg));
+			/* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */
+			scsi_name_len += 10;
+			/* Header size + Designation descriptor */
+			scsi_name_len += 4;
+			padding = ((-scsi_name_len) & 3);
+			if (padding != 0)
+				scsi_name_len += padding;
+
+			if ((len + scsi_name_len) > cmd->data_length) {
+				len += scsi_name_len;
+				goto set_len;
+			}
+			buf[off] =
+				(TPG_TFO(tpg)->get_fabric_proto_ident() << 4);
+			buf[off++] |= 0x3; /* CODE SET == UTF-8 */
+			buf[off] = 0x80; /* Set PIV=1 */
+			/* Set ASSOICATION == target port: 01b */
+			buf[off] |= 0x10;
+			/* DESIGNATOR TYPE == SCSI name string */
+			buf[off++] |= 0x8;
+			off += 2; /* Skip over Reserved and length */
+			/*
+			 * SCSI name string identifer containing, $FABRIC_MOD
+			 * dependent information.  For LIO-Target and iSCSI
+			 * Target Port, this means "<iSCSI name>,t,0x<TPGT> in
+			 * UTF-8 encoding.
+			 */
+			tpgt = TPG_TFO(tpg)->tpg_get_tag(tpg);
+			scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x",
+					TPG_TFO(tpg)->tpg_get_wwn(tpg), tpgt);
+			scsi_name_len += 1 /* Include  NULL terminator */;
+			/*
+			 * The null-terminated, null-padded (see 4.4.2) SCSI
+			 * NAME STRING field contains a UTF-8 format string.
+			 * The number of bytes in the SCSI NAME STRING field
+			 * (i.e., the value in the DESIGNATOR LENGTH field)
+			 * shall be no larger than 256 and shall be a multiple
+			 * of four.
+			 */
+			if (padding)
+				scsi_name_len += padding;
+
+			buf[off-1] = scsi_name_len;
+			off += scsi_name_len;
+			/* Header size + Designation descriptor */
+			len += (scsi_name_len + 4);
+		}
+set_len:
+		buf[2] = ((len >> 8) & 0xff);
+		buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */
+		break;
+	default:
+		printk(KERN_ERR "Unknown VPD Code: 0x%02x\n", cdb[2]);
+		return -1;
+	}
+
+	return 0;
+}
+
+int transport_generic_emulate_readcapacity(
+	se_cmd_t *cmd,
+	u32 blocks)
+{
+	se_device_t *dev = SE_DEV(cmd);
+	unsigned char *buf = (unsigned char *) T_TASK(cmd)->t_task_buf;
+
+	buf[0] = (blocks >> 24) & 0xff;
+	buf[1] = (blocks >> 16) & 0xff;
+	buf[2] = (blocks >> 8) & 0xff;
+	buf[3] = blocks & 0xff;
+	buf[4] = (DEV_ATTRIB(dev)->block_size >> 24) & 0xff;
+	buf[5] = (DEV_ATTRIB(dev)->block_size >> 16) & 0xff;
+	buf[6] = (DEV_ATTRIB(dev)->block_size >> 8) & 0xff;
+	buf[7] = DEV_ATTRIB(dev)->block_size & 0xff;
+
+	return 0;
+}
+
+int transport_generic_emulate_readcapacity_16(
+	se_cmd_t *cmd,
+	unsigned long long blocks)
+{
+	se_device_t *dev = SE_DEV(cmd);
+	unsigned char *buf = (unsigned char *) T_TASK(cmd)->t_task_buf;
+
+	buf[0] = (blocks >> 56) & 0xff;
+	buf[1] = (blocks >> 48) & 0xff;
+	buf[2] = (blocks >> 40) & 0xff;
+	buf[3] = (blocks >> 32) & 0xff;
+	buf[4] = (blocks >> 24) & 0xff;
+	buf[5] = (blocks >> 16) & 0xff;
+	buf[6] = (blocks >> 8) & 0xff;
+	buf[7] = blocks & 0xff;
+	buf[8] = (DEV_ATTRIB(dev)->block_size >> 24) & 0xff;
+	buf[9] = (DEV_ATTRIB(dev)->block_size >> 16) & 0xff;
+	buf[10] = (DEV_ATTRIB(dev)->block_size >> 8) & 0xff;
+	buf[11] = DEV_ATTRIB(dev)->block_size & 0xff;
+
+	return 0;
+}
+
+static int transport_modesense_rwrecovery(unsigned char *p)
+{
+	p[0] = 0x01;
+	p[1] = 0x0a;
+
+	return 12;
+}
+
+static int transport_modesense_control(se_device_t *dev, unsigned char *p)
+{
+	p[0] = 0x0a;
+	p[1] = 0x0a;
+	p[2] = 2;
+	/*
+	 * From spc4r17, section 7.4.6 Control mode Page
+	 *
+	 * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b
+	 *
+	 * 00b: The logical unit shall clear any unit attention condition
+	 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
+	 * status and shall not establish a unit attention condition when a com-
+	 * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT
+	 * status.
+	 *
+	 * 10b: The logical unit shall not clear any unit attention condition
+	 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
+	 * status and shall not establish a unit attention condition when
+	 * a command is completed with BUSY, TASK SET FULL, or RESERVATION
+	 * CONFLICT status.
+	 *
+	 * 11b a The logical unit shall not clear any unit attention condition
+	 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
+	 * status and shall establish a unit attention condition for the
+	 * initiator port associated with the I_T nexus on which the BUSY,
+	 * TASK SET FULL, or RESERVATION CONFLICT status is being returned.
+	 * Depending on the status, the additional sense code shall be set to
+	 * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS
+	 * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE
+	 * command, a unit attention condition shall be established only once
+	 * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless
+	 * to the number of commands completed with one of those status codes.
+	 */
+	p[4] = (DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl == 2) ? 0x30 :
+	       (DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00;
+	/*
+	 * From spc4r17, section 7.4.6 Control mode Page
+	 *
+	 * Task Aborted Status (TAS) bit set to zero.
+	 *
+	 * A task aborted status (TAS) bit set to zero specifies that aborted
+	 * tasks shall be terminated by the device server without any response
+	 * to the application client. A TAS bit set to one specifies that tasks
+	 * aborted by the actions of an I_T nexus other than the I_T nexus on
+	 * which the command was received shall be completed with TASK ABORTED
+	 * status (see SAM-4).
+	 */
+	p[5] = (DEV_ATTRIB(dev)->emulate_tas) ? 0x40 : 0x00;
+	p[8] = 0xff;
+	p[9] = 0xff;
+	p[11] = 30;
+
+	return 12;
+}
+
+static int transport_modesense_caching(unsigned char *p)
+{
+	p[0] = 0x08;
+	p[1] = 0x12;
+#if 0
+	p[2] = 0x04; /* Write Cache Enable */
+#endif
+	p[12] = 0x20; /* Disabled Read Ahead */
+
+	return 20;
+}
+
+#if 0
+static int transport_modesense_devicecaps(unsigned char *p)
+{
+	p[0] = 0x2a;
+	p[1] = 0x0a;
+
+	return 12;
+}
+#endif
+
+static void transport_modesense_write_protect(
+	unsigned char *buf,
+	int type)
+{
+	/*
+	 * I believe that the WP bit (bit 7) in the mode header is the same for
+	 * all device types..
+	 */
+	switch (type) {
+	case TYPE_DISK:
+	case TYPE_TAPE:
+	default:
+		buf[0] |= 0x80; /* WP bit */
+		break;
+	}
+}
+
+int transport_generic_emulate_modesense(
+	se_cmd_t *cmd,
+	unsigned char *cdb,
+	unsigned char *rbuf,
+	int ten,
+	int type)
+{
+	se_device_t *dev = SE_DEV(cmd);
+	int offset = (ten) ? 8 : 4;
+	int length = 0;
+	unsigned char buf[SE_MODE_PAGE_BUF];
+
+	memset(buf, 0, SE_MODE_PAGE_BUF);
+
+	switch (cdb[2] & 0x3f) {
+	case 0x01:
+		length = transport_modesense_rwrecovery(&buf[offset]);
+		break;
+	case 0x08:
+		length = transport_modesense_caching(&buf[offset]);
+		break;
+	case 0x0a:
+		length = transport_modesense_control(dev, &buf[offset]);
+		break;
+#if 0
+	case 0x2a:
+		length = transport_modesense_devicecaps(&buf[offset]);
+		break;
+#endif
+	case 0x3f:
+		length = transport_modesense_rwrecovery(&buf[offset]);
+		length += transport_modesense_caching(&buf[offset+length]);
+		length += transport_modesense_control(dev, &buf[offset+length]);
+#if 0
+		length += transport_modesense_devicecaps(&buf[offset+length]);
+#endif
+		break;
+	default:
+		printk(KERN_ERR "Got Unknown Mode Page: 0x%02x\n",
+				cdb[2] & 0x3f);
+		return PYX_TRANSPORT_UNKNOWN_MODE_PAGE;
+	}
+	offset += length;
+
+	if (ten) {
+		offset -= 2;
+		buf[0] = (offset >> 8) & 0xff;
+		buf[1] = offset & 0xff;
+
+		if ((SE_LUN(cmd)->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) ||
+		    (cmd->se_deve &&
+		    (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
+			transport_modesense_write_protect(&buf[3], type);
+
+		if ((offset + 2) > cmd->data_length)
+			offset = cmd->data_length;
+
+	} else {
+		offset -= 1;
+		buf[0] = offset & 0xff;
+
+		if ((SE_LUN(cmd)->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) ||
+		    (cmd->se_deve &&
+		    (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
+			transport_modesense_write_protect(&buf[2], type);
+
+		if ((offset + 1) > cmd->data_length)
+			offset = cmd->data_length;
+	}
+	memcpy(rbuf, buf, offset);
+
+	return 0;
+}
+
+int transport_generic_emulate_request_sense(
+	se_cmd_t *cmd,
+	unsigned char *cdb)
+{
+	unsigned char *buf = (unsigned char *) T_TASK(cmd)->t_task_buf;
+	u8 ua_asc = 0, ua_ascq = 0;
+
+	if (cdb[1] & 0x01) {
+		printk(KERN_ERR "REQUEST_SENSE description emulation not"
+			" supported\n");
+		return PYX_TRANSPORT_INVALID_CDB_FIELD;
+	}
+	if (!(core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq))) {
+		/*
+		 * CURRENT ERROR, UNIT ATTENTION
+		 */
+		buf[0] = 0x70;
+		buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION;
+		/*
+		 * Make sure request data length is enough for additional
+		 * sense data.
+		 */
+		if (cmd->data_length <= 18) {
+			buf[7] = 0x00;
+			return 0;
+		}
+		/*
+		 * The Additional Sense Code (ASC) from the UNIT ATTENTION
+		 */
+		buf[SPC_ASC_KEY_OFFSET] = ua_asc;
+		buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq;
+		buf[7] = 0x0A;
+	} else {
+		/*
+		 * CURRENT ERROR, NO SENSE
+		 */
+		buf[0] = 0x70;
+		buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE;
+		/*
+		 * Make sure request data length is enough for additional
+		 * sense data.
+		 */
+		if (cmd->data_length <= 18) {
+			buf[7] = 0x00;
+			return 0;
+		}
+		/*
+		 * NO ADDITIONAL SENSE INFORMATION
+		 */
+		buf[SPC_ASC_KEY_OFFSET] = 0x00;
+		buf[7] = 0x0A;
+	}
+
+	return 0;
+}
+
+/*
+ * Used to obtain Sense Data from underlying Linux/SCSI struct scsi_cmnd
+ */
+int transport_get_sense_data(se_cmd_t *cmd)
+{
+	unsigned char *buffer = cmd->sense_buffer, *sense_buffer = NULL;
+	se_device_t *dev;
+	se_task_t *task = NULL, *task_tmp;
+	unsigned long flags;
+	u32 offset = 0;
+
+	if (!SE_LUN(cmd)) {
+		printk(KERN_ERR "SE_LUN(cmd) is NULL\n");
+		return -1;
+	}
+	spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+	if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) {
+		spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+		return 0;
+	}
+
+	list_for_each_entry_safe(task, task_tmp,
+				&T_TASK(cmd)->t_task_list, t_list) {
+
+		if (!task->task_sense)
+			continue;
+
+		dev = task->se_dev;
+		if (!(dev))
+			continue;
+
+		if (!TRANSPORT(dev)->get_sense_buffer) {
+			printk(KERN_ERR "TRANSPORT(dev)->get_sense_buffer"
+					" is NULL\n");
+			continue;
+		}
+
+		sense_buffer = TRANSPORT(dev)->get_sense_buffer(task);
+		if (!(sense_buffer)) {
+			printk(KERN_ERR "ITT[0x%08x]_TASK[%d]: Unable to locate"
+				" sense buffer for task with sense\n",
+				CMD_TFO(cmd)->get_task_tag(cmd), task->task_no);
+			continue;
+		}
+		spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+		offset = CMD_TFO(cmd)->set_fabric_sense_len(cmd,
+				TRANSPORT_SENSE_BUFFER);
+
+		memcpy((void *)&buffer[offset], (void *)sense_buffer,
+				TRANSPORT_SENSE_BUFFER);
+		cmd->scsi_status = task->task_scsi_status;
+		/* Automatically padded */
+		cmd->scsi_sense_length =
+				(TRANSPORT_SENSE_BUFFER + offset);
+
+		printk(KERN_INFO "HBA_[%u]_PLUG[%s]: Set SAM STATUS: 0x%02x"
+				" and sense\n",
+			dev->se_hba->hba_id, TRANSPORT(dev)->name,
+				cmd->scsi_status);
+		return 0;
+	}
+	spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+	return -1;
+}
+
+/*
+ * Generic function pointers for target_core_mod/ConfigFS
+ */
+#define SET_GENERIC_TRANSPORT_FUNCTIONS(cmd)				\
+do {									\
+	cmd->transport_allocate_iovecs =				\
+			&transport_generic_allocate_iovecs;		\
+	cmd->transport_get_task = &transport_generic_get_task;		\
+	cmd->transport_map_buffers_to_tasks =				\
+			&transport_generic_map_buffers_to_tasks;	\
+	cmd->transport_set_iovec_ptrs =					\
+			&transport_generic_set_iovec_ptrs;		\
+} while (0)
+
+/*	transport_generic_cmd_sequencer():
+ *
+ *	Generic Command Sequencer that should work for most DAS transport
+ *	drivers.
+ *
+ *	Called from transport_generic_allocate_tasks() in the $FABRIC_MOD
+ *	RX Thread.
+ *
+ *	FIXME: Need to support other SCSI OPCODES where as well.
+ */
+static int transport_generic_cmd_sequencer(
+	se_cmd_t *cmd,
+	unsigned char *cdb)
+{
+	se_device_t *dev = SE_DEV(cmd);
+	se_subsystem_dev_t *su_dev = dev->se_sub_dev;
+	int ret = 0, sector_ret = 0;
+	u32 sectors = 0, size = 0, pr_reg_type = 0;
+	/*
+	 * Check for an existing UNIT ATTENTION condition
+	 */
+	if (core_scsi3_ua_check(cmd, cdb) < 0) {
+		cmd->transport_wait_for_tasks =
+				&transport_nop_wait_for_tasks;
+		transport_get_maps(cmd);
+		return 8; /* UNIT ATTENTION */
+	}
+	/*
+	 * Check status for SPC-3 Persistent Reservations
+	 */
+	if (T10_RES(su_dev)->t10_reservation_check(cmd, &pr_reg_type) != 0) {
+		if (T10_RES(su_dev)->t10_seq_non_holder(
+					cmd, cdb, pr_reg_type) != 0) {
+			cmd->transport_wait_for_tasks =
+					&transport_nop_wait_for_tasks;
+			transport_get_maps(cmd);
+			return 5; /* RESERVATION CONFLIT */
+		}
+		/*
+		 * This means the CDB is allowed for the SCSI Initiator port
+		 * when said port is *NOT* holding the legacy SPC-2 or
+		 * SPC-3 Persistent Reservation.
+		 */
+	}
+
+	switch (cdb[0]) {
+	case READ_6:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		sectors = transport_get_sectors_6(cdb, cmd, &sector_ret);
+		if (sector_ret)
+			return 4;
+		size = transport_get_size(sectors, cdb, cmd);
+		CMD_ORIG_OBJ_API(cmd)->get_mem_SG(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		cmd->transport_split_cdb = &split_cdb_XX_6;
+		cmd->transport_get_lba = &transport_lba_21;
+		break;
+	case READ_10:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		sectors = transport_get_sectors_10(cdb, cmd, &sector_ret);
+		if (sector_ret)
+			return 4;
+		size = transport_get_size(sectors, cdb, cmd);
+		CMD_ORIG_OBJ_API(cmd)->get_mem_SG(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		cmd->transport_split_cdb = &split_cdb_XX_10;
+		cmd->transport_get_lba = &transport_lba_32;
+		break;
+	case READ_12:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		sectors = transport_get_sectors_12(cdb, cmd, &sector_ret);
+		if (sector_ret)
+			return 4;
+		size = transport_get_size(sectors, cdb, cmd);
+		CMD_ORIG_OBJ_API(cmd)->get_mem_SG(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		cmd->transport_split_cdb = &split_cdb_XX_12;
+		cmd->transport_get_lba = &transport_lba_32;
+		break;
+	case READ_16:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		sectors = transport_get_sectors_16(cdb, cmd, &sector_ret);
+		if (sector_ret)
+			return 4;
+		size = transport_get_size(sectors, cdb, cmd);
+		CMD_ORIG_OBJ_API(cmd)->get_mem_SG(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		cmd->transport_split_cdb = &split_cdb_XX_16;
+		cmd->transport_get_long_lba = &transport_lba_64;
+		break;
+	case WRITE_6:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		sectors = transport_get_sectors_6(cdb, cmd, &sector_ret);
+		if (sector_ret)
+			return 4;
+		size = transport_get_size(sectors, cdb, cmd);
+		CMD_ORIG_OBJ_API(cmd)->get_mem_SG(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		cmd->transport_split_cdb = &split_cdb_XX_6;
+		cmd->transport_get_lba = &transport_lba_21;
+		break;
+	case WRITE_10:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		sectors = transport_get_sectors_10(cdb, cmd, &sector_ret);
+		if (sector_ret)
+			return 4;
+		size = transport_get_size(sectors, cdb, cmd);
+		CMD_ORIG_OBJ_API(cmd)->get_mem_SG(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		cmd->transport_split_cdb = &split_cdb_XX_10;
+		cmd->transport_get_lba = &transport_lba_32;
+		break;
+	case WRITE_12:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		sectors = transport_get_sectors_12(cdb, cmd, &sector_ret);
+		if (sector_ret)
+			return 4;
+		size = transport_get_size(sectors, cdb, cmd);
+		CMD_ORIG_OBJ_API(cmd)->get_mem_SG(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		cmd->transport_split_cdb = &split_cdb_XX_12;
+		cmd->transport_get_lba = &transport_lba_32;
+		break;
+	case WRITE_16:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		sectors = transport_get_sectors_16(cdb, cmd, &sector_ret);
+		if (sector_ret)
+			return 4;
+		size = transport_get_size(sectors, cdb, cmd);
+		CMD_ORIG_OBJ_API(cmd)->get_mem_SG(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		cmd->transport_split_cdb = &split_cdb_XX_16;
+		cmd->transport_get_long_lba = &transport_lba_64;
+		break;
+	case 0xa3:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		if (TRANSPORT(dev)->get_device_type(dev) != TYPE_ROM) {
+			/* MAINTENANCE_IN from SCC-2 */
+			/*
+			 * Check for emulated MI_REPORT_TARGET_PGS.
+			 */
+			if (cdb[1] == MI_REPORT_TARGET_PGS) {
+				cmd->transport_emulate_cdb =
+				(T10_ALUA(su_dev)->alua_type ==
+				 SPC3_ALUA_EMULATED) ?
+				&core_scsi3_emulate_report_target_port_groups :
+				NULL;
+			}
+			size = (cdb[6] << 24) | (cdb[7] << 16) |
+			       (cdb[8] << 8) | cdb[9];
+		} else {
+			/* GPCMD_SEND_KEY from multi media commands */
+			size = (cdb[8] << 8) + cdb[9];
+		}
+		CMD_ORIG_OBJ_API(cmd)->get_mem_buf(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		ret = 2;
+		break;
+	case MODE_SELECT:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		size = cdb[4];
+		CMD_ORIG_OBJ_API(cmd)->get_mem_SG(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		ret = 1;
+		break;
+	case MODE_SELECT_10:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		size = (cdb[7] << 8) + cdb[8];
+		CMD_ORIG_OBJ_API(cmd)->get_mem_SG(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		ret = 1;
+		break;
+	case MODE_SENSE:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		size = cdb[4];
+		CMD_ORIG_OBJ_API(cmd)->get_mem_buf(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		ret = 2;
+		break;
+	case MODE_SENSE_10:
+	case GPCMD_READ_BUFFER_CAPACITY:
+	case GPCMD_SEND_OPC:
+	case LOG_SELECT:
+	case LOG_SENSE:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		size = (cdb[7] << 8) + cdb[8];
+		CMD_ORIG_OBJ_API(cmd)->get_mem_buf(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		ret = 2;
+		break;
+	case READ_BLOCK_LIMITS:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		size = READ_BLOCK_LEN;
+		CMD_ORIG_OBJ_API(cmd)->get_mem_buf(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		ret = 2;
+		break;
+	case GPCMD_GET_CONFIGURATION:
+	case GPCMD_READ_FORMAT_CAPACITIES:
+	case GPCMD_READ_DISC_INFO:
+	case GPCMD_READ_TRACK_RZONE_INFO:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		size = (cdb[7] << 8) + cdb[8];
+		CMD_ORIG_OBJ_API(cmd)->get_mem_SG(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		ret = 1;
+		break;
+	case PERSISTENT_RESERVE_IN:
+	case PERSISTENT_RESERVE_OUT:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		cmd->transport_emulate_cdb =
+			(T10_RES(su_dev)->res_type ==
+			 SPC3_PERSISTENT_RESERVATIONS) ?
+			&core_scsi3_emulate_pr : NULL;
+		size = (cdb[7] << 8) + cdb[8];
+		CMD_ORIG_OBJ_API(cmd)->get_mem_buf(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		ret = 2;
+		break;
+	case GPCMD_MECHANISM_STATUS:
+	case GPCMD_READ_DVD_STRUCTURE:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		size = (cdb[8] << 8) + cdb[9];
+		CMD_ORIG_OBJ_API(cmd)->get_mem_SG(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		ret = 1;
+		break;
+	case READ_POSITION:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		size = READ_POSITION_LEN;
+		CMD_ORIG_OBJ_API(cmd)->get_mem_buf(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		ret = 2;
+		break;
+	case 0xa4:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		if (TRANSPORT(dev)->get_device_type(dev) != TYPE_ROM) {
+			/* MAINTENANCE_OUT from SCC-2 */
+			size = (cdb[6] << 24) | (cdb[7] << 16) |
+			       (cdb[8] << 8) | cdb[9];
+		} else  {
+			/* GPCMD_REPORT_KEY from multi media commands */
+			size = (cdb[8] << 8) + cdb[9];
+		}
+		CMD_ORIG_OBJ_API(cmd)->get_mem_SG(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		ret = 1;
+		break;
+	case INQUIRY:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		size = (cdb[3] << 8) + cdb[4];
+		CMD_ORIG_OBJ_API(cmd)->get_mem_buf(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		ret = 2;
+		break;
+	case READ_BUFFER:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8];
+		CMD_ORIG_OBJ_API(cmd)->get_mem_buf(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		ret = 2;
+		break;
+	case READ_CAPACITY:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		size = READ_CAP_LEN;
+		CMD_ORIG_OBJ_API(cmd)->get_mem_buf(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		ret = 2;
+		break;
+	case READ_MEDIA_SERIAL_NUMBER:
+	case SECURITY_PROTOCOL_IN:
+	case SECURITY_PROTOCOL_OUT:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
+		CMD_ORIG_OBJ_API(cmd)->get_mem_buf(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		ret = 2;
+		break;
+	case SERVICE_ACTION_IN:
+	case ACCESS_CONTROL_IN:
+	case ACCESS_CONTROL_OUT:
+	case EXTENDED_COPY:
+	case READ_ATTRIBUTE:
+	case RECEIVE_COPY_RESULTS:
+	case WRITE_ATTRIBUTE:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		size = (cdb[10] << 24) | (cdb[11] << 16) |
+		       (cdb[12] << 8) | cdb[13];
+		CMD_ORIG_OBJ_API(cmd)->get_mem_buf(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		ret = 2;
+		break;
+	case VARIABLE_LENGTH_CMD:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		size = (cdb[10] << 8) | cdb[11];
+		CMD_ORIG_OBJ_API(cmd)->get_mem_buf(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		ret = 2;
+		break;
+	case RECEIVE_DIAGNOSTIC:
+	case SEND_DIAGNOSTIC:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		size = (cdb[3] << 8) | cdb[4];
+		CMD_ORIG_OBJ_API(cmd)->get_mem_buf(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		ret = 2;
+		break;
+/* #warning FIXME: Figure out correct GPCMD_READ_CD blocksize. */
+#if 0
+	case GPCMD_READ_CD:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		sectors = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8];
+		size = (2336 * sectors);
+		CMD_ORIG_OBJ_API(cmd)->get_mem_buf(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		ret = 2;
+		break;
+#endif
+	case READ_TOC:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		size = cdb[8];
+		CMD_ORIG_OBJ_API(cmd)->get_mem_buf(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		ret = 2;
+		break;
+	case REQUEST_SENSE:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		size = cdb[4];
+		CMD_ORIG_OBJ_API(cmd)->get_mem_buf(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		ret = 2;
+		break;
+	case READ_ELEMENT_STATUS:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		size = 65536 * cdb[7] + 256 * cdb[8] + cdb[9];
+		CMD_ORIG_OBJ_API(cmd)->get_mem_buf(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		ret = 2;
+		break;
+	case WRITE_BUFFER:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8];
+		CMD_ORIG_OBJ_API(cmd)->get_mem_buf(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		ret = 2;
+		break;
+	case RESERVE:
+	case RESERVE_10:
+		/*
+		 * The SPC-2 RESERVE does not contain a size in the SCSI CDB.
+		 * Assume the passthrough or $FABRIC_MOD will tell us about it.
+		 */
+		if (cdb[0] == RESERVE_10)
+			size = (cdb[7] << 8) | cdb[8];
+		else
+			size = cmd->data_length;
+
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		cmd->transport_allocate_resources =
+				&transport_generic_allocate_none;
+		transport_get_maps(cmd);
+
+		ret = T10_RES(su_dev)->t10_reserve(cmd);
+		if (ret != 0) {
+			if (ret > 0)
+				return 5; /* RESERVATION_CONFILIT */
+			else
+				return 7; /* ILLEGAL_REQUEST */
+		}
+		ret = 3;
+		break;
+	case RELEASE:
+	case RELEASE_10:
+		/*
+		 * The SPC-2 RELEASE does not contain a size in the SCSI CDB.
+		 * Assume the passthrough or $FABRIC_MOD will tell us about it.
+		*/
+		if (cdb[0] == RELEASE_10)
+			size = (cdb[7] << 8) | cdb[8];
+		else
+			size = cmd->data_length;
+
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		cmd->transport_allocate_resources =
+				&transport_generic_allocate_none;
+		transport_get_maps(cmd);
+
+		T10_RES(su_dev)->t10_release(cmd);
+		ret = 3;
+		break;
+	case ALLOW_MEDIUM_REMOVAL:
+	case GPCMD_CLOSE_TRACK:
+	case ERASE:
+	case INITIALIZE_ELEMENT_STATUS:
+	case GPCMD_LOAD_UNLOAD:
+	case REZERO_UNIT:
+	case SEEK_10:
+	case GPCMD_SET_SPEED:
+	case SPACE:
+	case START_STOP:
+	case SYNCHRONIZE_CACHE:
+	case TEST_UNIT_READY:
+	case VERIFY:
+	case WRITE_FILEMARKS:
+	case MOVE_MEDIUM:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		cmd->transport_allocate_resources =
+				&transport_generic_allocate_none;
+		transport_get_maps(cmd);
+		ret = 3;
+		break;
+	case REPORT_LUNS:
+		SET_GENERIC_TRANSPORT_FUNCTIONS(cmd);
+		cmd->transport_emulate_cdb =
+				&transport_core_report_lun_response;
+		size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
+		CMD_ORIG_OBJ_API(cmd)->get_mem_buf(cmd->se_orig_obj_ptr, cmd);
+		transport_get_maps(cmd);
+		ret = 2;
+		break;
+	default:
+		printk(KERN_WARNING "TARGET_CORE[%s]: Unsupported SCSI Opcode"
+			" 0x%02x, sending CHECK_CONDITION.\n",
+			CMD_TFO(cmd)->get_fabric_name(), cdb[0]);
+		cmd->transport_wait_for_tasks = &transport_nop_wait_for_tasks;
+		transport_get_maps(cmd);
+		return 4;
+	}
+
+	if (size != cmd->data_length) {
+		printk(KERN_WARNING "TARGET_CORE[%s]: Expected Transfer Length:"
+			" %u does not match SCSI CDB Length: %u for SAM Opcode:"
+			" 0x%02x\n", CMD_TFO(cmd)->get_fabric_name(),
+				cmd->data_length, size, cdb[0]);
+
+		cmd->cmd_spdtl = size;
+
+		if (cmd->data_direction == SE_DIRECTION_WRITE) {
+			printk(KERN_ERR "Rejecting underflow/overflow"
+					" WRITE data\n");
+			return 6;
+		}
+		/*
+		 * Reject READ_* or WRITE_* with overflow/underflow for
+		 * type SCF_SCSI_DATA_SG_IO_CDB.
+		 */
+		if (!(ret) && (DEV_ATTRIB(dev)->block_size != 512))  {
+			printk(KERN_ERR "Failing OVERFLOW/UNDERFLOW for LBA op"
+				" CDB on non 512-byte sector setup subsystem"
+				" plugin: %s\n", TRANSPORT(dev)->name);
+			/* Returns CHECK_CONDITION + INVALID_CDB_FIELD */
+			return 6;
+		}
+
+		if (size > cmd->data_length) {
+			cmd->se_cmd_flags |= SCF_OVERFLOW_BIT;
+			cmd->residual_count = (size - cmd->data_length);
+		} else {
+			cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
+			cmd->residual_count = (cmd->data_length - size);
+		}
+		cmd->data_length = size;
+	}
+
+	transport_set_supported_SAM_opcode(cmd);
+	return ret;
+}
+
+static inline se_cmd_t *transport_alloc_passthrough_cmd(
+	u32 data_length,
+	int data_direction)
+{
+	return __transport_alloc_se_cmd(&passthrough_fabric_ops, NULL, NULL,
+			data_length, data_direction);
+}
+
+se_cmd_t *transport_allocate_passthrough(
+	unsigned char *cdb,
+	int data_direction,
+	u32 se_cmd_flags,
+	void *mem,
+	u32 se_mem_num,
+	u32 length,
+	se_obj_lun_type_t *obj_api,
+	void *type_ptr)
+{
+	se_cmd_t *cmd;
+	se_transform_info_t ti;
+
+	cmd = transport_alloc_passthrough_cmd(length, data_direction);
+	if (!(cmd))
+		return NULL;
+	/*
+	 * Simulate an SE LUN entry need for passing SCSI CDBs into
+	 * se_cmd_t.
+	 */
+	cmd->se_lun = kzalloc(sizeof(se_lun_t), GFP_KERNEL);
+	if (!(cmd->se_lun)) {
+		printk(KERN_ERR "Unable to allocate cmd->se_lun\n");
+		goto fail;
+	}
+
+	spin_lock_init(&cmd->se_lun->lun_sep_lock);
+	SE_LUN(cmd)->lun_type = obj_api->se_obj_type;
+	SE_LUN(cmd)->lun_type_ptr = type_ptr;
+	SE_LUN(cmd)->lun_obj_api = obj_api;
+
+	cmd->se_orig_obj_api = obj_api;
+	cmd->se_orig_obj_ptr = type_ptr;
+	cmd->se_cmd_flags = se_cmd_flags;
+	SE_LUN(cmd)->se_dev = (se_device_t *) type_ptr;
+
+	/*
+	 * Double check that the passed object is currently accepting CDBs
+	 */
+	if (obj_api->check_online(type_ptr) != 0) {
+		DEBUG_SO("obj_api->check_online() failed!\n");
+		goto fail;
+	}
+
+	cmd->data_length = length;
+	cmd->data_direction = data_direction;
+	cmd->se_cmd_flags |= SCF_CMD_PASSTHROUGH;
+
+	if (transport_generic_allocate_tasks(cmd, cdb) < 0)
+		goto fail;
+
+	memset(&ti, 0, sizeof(se_transform_info_t));
+	ti.ti_data_length = cmd->data_length;
+	ti.ti_dev = SE_LUN(cmd)->se_dev;
+	ti.ti_se_cmd = cmd;
+	ti.se_obj_ptr = type_ptr;
+	ti.se_obj_api = SE_LUN(cmd)->lun_obj_api;
+
+	DEBUG_SO("ti.se_obj_ptr: %p\n", ti.se_obj_ptr);
+	DEBUG_SO("ti.se_obj_api: %p\n", ti.se_obj_api);
+	DEBUG_SO("Plugin: %s\n", ti.se_obj_api->obj_plugin->plugin_name);
+
+	if (!mem) {
+		if (cmd->transport_allocate_resources(cmd, cmd->data_length,
+					PAGE_SIZE) < 0)
+			goto fail;
+	} else {
+		/*
+		 * Passed *mem will contain a list_head containing preformatted
+		 * se_mem_t elements...
+		 */
+		T_TASK(cmd)->t_mem_list = (struct list_head *)mem;
+		T_TASK(cmd)->t_task_se_num = se_mem_num;
+		cmd->se_cmd_flags |= SCF_CMD_PASSTHROUGH_NOALLOC;
+
+#ifdef DEBUG_PASSTHROUGH
+		{
+		u32 total_se_length = 0;
+		se_mem_t *se_mem, *se_mem_tmp;
+
+		DEBUG_PT("Preallocated se_mem_list: %p se_mem_num: %d\n",
+				mem, se_mem_num);
+
+		list_for_each_entry_safe(se_mem, se_mem_tmp,
+				T_TASK(cmd)->t_mem_list, se_list) {
+			total_se_length += se_mem->se_len;
+			DEBUG_PT("se_mem: %p se_mem->se_page: %p %d:%d\n",
+				se_mem, se_mem->se_page, se_mem->se_len,
+				se_mem->se_off);
+		}
+		DEBUG_PT("Total calculated total_se_length: %u\n",
+				total_se_length);
+
+		if (total_se_length != length) {
+			printk(KERN_ERR "Passed length: %u does not equal"
+				" total_se_length: %u\n", length,
+					total_se_length);
+			BUG();
+		}
+		}
+#endif
+	}
+
+	if (transport_get_sectors(cmd, SE_LUN(cmd)->lun_obj_api, type_ptr) < 0)
+		goto fail;
+
+	if (transport_new_cmd_obj(cmd, &ti, SE_LUN(cmd)->lun_obj_api,
+			type_ptr, 0) < 0)
+		goto fail;
+
+	return cmd;
+
+fail:
+	if (T_TASK(cmd))
+		transport_release_tasks(cmd);
+	kfree(T_TASK(cmd));
+	kfree(cmd->se_lun);
+	transport_free_se_cmd(cmd);
+
+	return NULL;
+}
+
+void transport_passthrough_release(
+	se_cmd_t *cmd)
+{
+	if (!cmd) {
+		printk(KERN_ERR "transport_passthrough_release passed"
+			" NULL se_cmd_t\n");
+		return;
+	}
+
+	if (cmd->transport_wait_for_tasks)
+		cmd->transport_wait_for_tasks(cmd, 0, 0);
+
+	transport_generic_remove(cmd, 0, 0);
+}
+
+int transport_passthrough_complete(
+	se_cmd_t *cmd)
+{
+	if (cmd->se_orig_obj_api->check_shutdown(cmd->se_orig_obj_ptr) != 0)
+		return -2;
+
+	switch (cmd->scsi_status) {
+	case 0x00: /* GOOD */
+		DEBUG_PT("SCSI Status: GOOD\n");
+		return 0;
+	case 0x02: /* CHECK_CONDITION */
+		DEBUG_PT("SCSI Status: CHECK_CONDITION\n");
+/* #warning FIXME: Do some basic return values for Sense Data */
+		return -1;
+	default:
+		DEBUG_PT("SCSI Status: 0x%02x\n", cmd->scsi_status);
+		return -1;
+	}
+
+	return 0;
+}
+
+/*     transport_generic_passthrough():
+ *
+ *
+ */
+int transport_generic_passthrough_async(
+	se_cmd_t *cmd,
+	void (*callback)(se_cmd_t *cmd,
+		void *callback_arg, int complete_status),
+	void *callback_arg)
+{
+	int write = (cmd->data_direction == SE_DIRECTION_WRITE);
+	int no_alloc = (cmd->se_cmd_flags & SCF_CMD_PASSTHROUGH_NOALLOC);
+	int pt_done = (cmd->transport_passthrough_done != NULL);
+
+	if (callback) {
+		cmd->callback = callback;
+		cmd->callback_arg = callback_arg;
+	}
+
+	if (transport_generic_handle_cdb(cmd) < 0)
+		return -1;
+
+	if (write && !no_alloc) {
+		if (down_interruptible(
+			&T_TASK(cmd)->t_transport_passthrough_wsem) != 0)
+			return -1;
+
+		transport_generic_process_write(cmd);
+	}
+
+	if (callback || pt_done)
+		return 0;
+
+	down(&T_TASK(cmd)->t_transport_passthrough_sem);
+
+	return transport_passthrough_complete(cmd);
+}
+
+int transport_generic_passthrough(se_cmd_t *cmd)
+{
+	return transport_generic_passthrough_async(cmd, NULL, NULL);
+}
+
+/*	transport_generic_complete_ok():
+ *
+ *
+ */
+void transport_generic_complete_ok(se_cmd_t *cmd)
+{
+	int reason = 0;
+	/*
+	 * Check if we need to retrieve a sense buffer from
+	 * the se_cmd_t in question.
+	 */
+	if (cmd->se_cmd_flags & SCF_CMD_PASSTHROUGH) {
+		transport_lun_remove_cmd(cmd);
+		if (!(transport_cmd_check_stop(cmd, 2, 0)))
+			transport_passthrough_check_stop(cmd);
+		return;
+	} else if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) {
+		if (transport_get_sense_data(cmd) < 0)
+			reason = NON_EXISTENT_LUN;
+
+		/*
+		 * Only set when an se_task_t->task_scsi_status returned
+		 * a non GOOD status.
+		 */
+		if (cmd->scsi_status) {
+			transport_send_check_condition_and_sense(
+					cmd, reason, 1);
+			transport_lun_remove_cmd(cmd);
+			transport_cmd_check_stop(cmd, 2, 0);
+			return;
+		}
+	}
+
+	switch (cmd->data_direction) {
+	case SE_DIRECTION_READ:
+#ifdef SNMP_SUPPORT
+		spin_lock(&cmd->se_lun->lun_sep_lock);
+		if (SE_LUN(cmd)->lun_sep) {
+			SE_LUN(cmd)->lun_sep->sep_stats.tx_data_octets +=
+					cmd->data_length;
+		}
+		spin_unlock(&cmd->se_lun->lun_sep_lock);
+#endif
+		CMD_TFO(cmd)->queue_data_in(cmd);
+		break;
+	case SE_DIRECTION_WRITE:
+#ifdef SNMP_SUPPORT
+		spin_lock(&cmd->se_lun->lun_sep_lock);
+		if (SE_LUN(cmd)->lun_sep) {
+			SE_LUN(cmd)->lun_sep->sep_stats.rx_data_octets +=
+				cmd->data_length;
+		}
+		spin_unlock(&cmd->se_lun->lun_sep_lock);
+#endif
+		/* Fall through for SE_DIRECTION_WRITE */
+	case SE_DIRECTION_NONE:
+		CMD_TFO(cmd)->queue_status(cmd);
+		break;
+	default:
+		break;
+	}
+
+	transport_lun_remove_cmd(cmd);
+	transport_cmd_check_stop(cmd, 2, 0);
+}
+
+void transport_free_dev_tasks(se_cmd_t *cmd)
+{
+	se_task_t *task, *task_tmp;
+	unsigned long flags;
+
+	spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+	list_for_each_entry_safe(task, task_tmp,
+				&T_TASK(cmd)->t_task_list, t_list) {
+		if (atomic_read(&task->task_active))
+			continue;
+
+		if (!task->transport_req)
+			continue;
+
+		kfree(task->task_sg);
+
+		spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+		if (task->se_dev)
+			TRANSPORT(task->se_dev)->free_task(task);
+		else
+			printk(KERN_ERR "task[%u] - task->se_dev is NULL\n",
+				task->task_no);
+		spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+
+		list_del(&task->t_list);
+		kmem_cache_free(se_task_cache, task);
+	}
+	spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+}
+
+static inline void transport_free_pages(se_cmd_t *cmd)
+{
+	se_mem_t *se_mem, *se_mem_tmp;
+
+	if (T_TASK(cmd)->t_task_buf) {
+		kfree(T_TASK(cmd)->t_task_buf);
+		T_TASK(cmd)->t_task_buf = NULL;
+		return;
+	}
+
+	if (cmd->transport_free_resources) {
+		cmd->transport_free_resources(cmd);
+		return;
+	}
+	/*
+	 * Caller will handle releasing of se_mem_t.
+	 */
+	if (cmd->se_cmd_flags & SCF_CMD_PASSTHROUGH_NOALLOC)
+		return;
+
+	if (!(T_TASK(cmd)->t_task_se_num))
+		return;
+
+	list_for_each_entry_safe(se_mem, se_mem_tmp,
+			T_TASK(cmd)->t_mem_list, se_list) {
+		__free_page(se_mem->se_page);
+
+		list_del(&se_mem->se_list);
+		kfree(se_mem);
+	}
+
+	kfree(T_TASK(cmd)->t_mem_list);
+	T_TASK(cmd)->t_mem_list = NULL;
+	T_TASK(cmd)->t_task_se_num = 0;
+}
+
+void transport_release_tasks(se_cmd_t *cmd)
+{
+	CMD_ORIG_OBJ_API(cmd)->free_tasks(cmd->se_orig_obj_ptr, cmd);
+}
+
+static inline int transport_dec_and_check(se_cmd_t *cmd)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+	if (atomic_read(&T_TASK(cmd)->t_fe_count)) {
+		if (!(atomic_dec_and_test(&T_TASK(cmd)->t_fe_count))) {
+			spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock,
+					flags);
+			return 1;
+		}
+	}
+
+	if (atomic_read(&T_TASK(cmd)->t_se_count)) {
+		if (!(atomic_dec_and_test(&T_TASK(cmd)->t_se_count))) {
+			spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock,
+					flags);
+			return 1;
+		}
+	}
+	spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+	return 0;
+}
+
+void transport_release_fe_cmd(se_cmd_t *cmd)
+{
+	unsigned long flags;
+
+	if (transport_dec_and_check(cmd))
+		return;
+
+	spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+	transport_all_task_dev_remove_state(cmd);
+	spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+	transport_release_tasks(cmd);
+	transport_free_pages(cmd);
+
+	if (cmd->se_cmd_flags & SCF_CMD_PASSTHROUGH)
+		kfree(cmd->se_lun);
+
+	CMD_TFO(cmd)->release_cmd_direct(cmd);
+	transport_free_se_cmd(cmd);
+}
+
+/*	transport_generic_remove():
+ *
+ *
+ */
+int transport_generic_remove(
+	se_cmd_t *cmd,
+	int release_to_pool,
+	int session_reinstatement)
+{
+	unsigned long flags;
+
+	if (!(T_TASK(cmd)))
+		goto release_cmd;
+
+	if (transport_dec_and_check(cmd)) {
+		if (session_reinstatement) {
+			spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+			transport_all_task_dev_remove_state(cmd);
+			spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock,
+					flags);
+		}
+		return 1;
+	}
+
+	spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+	transport_all_task_dev_remove_state(cmd);
+	spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+	transport_release_tasks(cmd);
+	transport_free_pages(cmd);
+
+release_cmd:
+	if (release_to_pool && !(cmd->se_cmd_flags & SCF_CMD_PASSTHROUGH))
+		transport_release_cmd_to_pool(cmd);
+	else {
+		if (cmd->se_cmd_flags & SCF_CMD_PASSTHROUGH)
+			kfree(cmd->se_lun);
+
+		CMD_TFO(cmd)->release_cmd_direct(cmd);
+		transport_free_se_cmd(cmd);
+	}
+
+	return 0;
+}
+
+/*	transport_generic_map_buffers_to_tasks():
+ *
+ *	Called from transport_generic_new_cmd() in Transport Processing Thread.
+ */
+static int transport_generic_map_buffers_to_tasks(se_cmd_t *cmd)
+{
+	se_task_t *task = NULL;
+	int ret;
+
+	/*
+	 * Deal with non [READ,WRITE]_XX CDBs here.
+	 */
+	if (cmd->se_cmd_flags & SCF_SCSI_NON_DATA_CDB)
+		goto non_scsi_data;
+	else if (cmd->se_cmd_flags & SCF_SCSI_CONTROL_NONSG_IO_CDB) {
+		list_for_each_entry(task, &T_TASK(cmd)->t_task_list, t_list) {
+			if (atomic_read(&task->task_sent))
+				continue;
+
+			ret = task->transport_map_task(task, task->task_size);
+			if (ret < 0)
+				return ret;
+
+			DEBUG_CMD_M("Mapping SCF_SCSI_CONTROL_NONSG_IO_CDB"
+				" task_size: %u\n", task->task_size);
+		}
+		return 0;
+	}
+
+	/*
+	 * Determine the scatterlist offset for each se_task_t,
+	 * and segment and set pointers to storage transport buffers
+	 * via task->transport_map_task().
+	 */
+	list_for_each_entry(task, &T_TASK(cmd)->t_task_list, t_list) {
+		if (atomic_read(&task->task_sent))
+			continue;
+
+		ret = task->transport_map_task(task, task->task_size);
+		if (ret < 0)
+			return ret;
+
+		DEBUG_CMD_M("Mapping task[%d]_se_obj_ptr[%p] %s_IO task_lba:"
+			" %llu task_size: %u task_sg_num: %d\n",
+			task->task_no, task->se_obj_ptr,
+			(cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB) ?
+			"CONTROL" : "DATA", task->task_lba, task->task_size,
+			task->task_sg_num);
+	}
+
+	return 0;
+
+non_scsi_data:
+	list_for_each_entry(task, &T_TASK(cmd)->t_task_list, t_list) {
+		if (atomic_read(&task->task_sent))
+			continue;
+
+		ret = task->transport_map_task(task, task->task_size);
+		if (ret < 0)
+			return ret;
+
+		DEBUG_CMD_M("Mapping SCF_SCSI_NON_DATA_CDB task_size: %u"
+			" task->task_sg_num: %d\n", task->task_size,
+				task->task_sg_num);
+	}
+
+	return 0;
+}
+
+/*	transport_generic_do_transform():
+ *
+ *
+ */
+int transport_generic_do_transform(se_cmd_t *cmd, se_transform_info_t *ti)
+{
+	if (cmd->transport_cdb_transform(cmd, ti) < 0)
+		return -1;
+
+	return 0;
+}
+
+int transport_get_sectors(
+	se_cmd_t *cmd,
+	se_obj_lun_type_t *obj_api,
+	void *obj_ptr)
+{
+	if (!(cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB))
+		return 0;
+
+	T_TASK(cmd)->t_task_sectors =
+		(cmd->data_length / obj_api->blocksize(obj_ptr));
+	if (!(T_TASK(cmd)->t_task_sectors))
+		T_TASK(cmd)->t_task_sectors = 1;
+
+	if (obj_api->get_device_type(obj_ptr) != TYPE_DISK)
+		return 0;
+
+	if ((T_TASK(cmd)->t_task_lba + T_TASK(cmd)->t_task_sectors) >
+	     obj_api->total_sectors(obj_ptr)) {
+		printk(KERN_ERR "LBA: %llu Sectors: %u exceeds"
+			" obj_api->total_sectors(): %llu\n",
+			T_TASK(cmd)->t_task_lba, T_TASK(cmd)->t_task_sectors,
+			obj_api->total_sectors(obj_ptr));
+		cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+		cmd->scsi_sense_reason = SECTOR_COUNT_TOO_MANY;
+		return PYX_TRANSPORT_REQ_TOO_MANY_SECTORS;
+	}
+
+	return 0;
+}
+
+int transport_new_cmd_obj(
+	se_cmd_t *cmd,
+	se_transform_info_t *ti,
+	se_obj_lun_type_t *obj_api,
+	void *obj_ptr,
+	int post_execute)
+{
+	u32 task_cdbs = 0, task_offset = 0;
+	se_mem_t *se_mem_out = NULL;
+
+	if (!(cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB)) {
+		task_cdbs++;
+		T_TASK(cmd)->t_task_cdbs++;
+	} else {
+		ti->ti_set_counts = 1;
+
+		task_cdbs = obj_api->get_cdb_count(obj_ptr, ti,
+				T_TASK(cmd)->t_task_lba,
+				T_TASK(cmd)->t_task_sectors,
+				NULL, &se_mem_out, &task_offset);
+		if (!(task_cdbs)) {
+			cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+			cmd->scsi_sense_reason =
+					LOGICAL_UNIT_COMMUNICATION_FAILURE;
+			return PYX_TRANSPORT_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+		}
+		T_TASK(cmd)->t_task_cdbs += task_cdbs;
+
+		cmd->transport_cdb_transform =
+				&transport_process_data_sg_transform;
+#if 0
+		printk(KERN_INFO "[%s]: api: %p ptr: %p data_length: %u, LBA:"
+			" %llu t_task_sectors: %u, t_task_cdbs: %u\n",
+			obj_api->obj_plugin->plugin_name, obj_api, obj_ptr,
+			cmd->data_length, T_TASK(cmd)->t_task_lba,
+			T_TASK(cmd)->t_task_sectors, T_TASK(cmd)->t_task_cdbs);
+#endif
+	}
+
+	cmd->transport_do_transform = &transport_generic_do_transform;
+	if (!post_execute) {
+		atomic_set(&T_TASK(cmd)->t_task_cdbs_left, task_cdbs);
+		atomic_set(&T_TASK(cmd)->t_task_cdbs_ex_left, task_cdbs);
+		atomic_set(&T_TASK(cmd)->t_task_cdbs_timeout_left, task_cdbs);
+	} else {
+		atomic_add(task_cdbs, &T_TASK(cmd)->t_task_cdbs_left);
+		atomic_add(task_cdbs, &T_TASK(cmd)->t_task_cdbs_ex_left);
+		atomic_add(task_cdbs, &T_TASK(cmd)->t_task_cdbs_timeout_left);
+	}
+
+	return 0;
+}
+
+unsigned char *transport_get_vaddr(se_mem_t *se_mem)
+{
+	return page_address(se_mem->se_page) + se_mem->se_off;
+}
+
+struct list_head *transport_init_se_mem_list(void)
+{
+	struct list_head *se_mem_list;
+
+	se_mem_list = kzalloc(sizeof(struct list_head), GFP_KERNEL);
+	if (!(se_mem_list)) {
+		printk(KERN_ERR "Unable to allocate memory for se_mem_list\n");
+		return NULL;
+	}
+	INIT_LIST_HEAD(se_mem_list);
+
+	return se_mem_list;
+}
+
+void transport_free_se_mem_list(struct list_head *se_mem_list)
+{
+	se_mem_t *se_mem, *se_mem_tmp;
+
+	if (!se_mem_list)
+		return;
+
+	list_for_each_entry_safe(se_mem, se_mem_tmp, se_mem_list, se_list) {
+		list_del(&se_mem->se_list);
+		kfree(se_mem);
+	}
+	kfree(se_mem_list);
+}
+
+int transport_generic_get_mem(se_cmd_t *cmd, u32 length, u32 dma_size)
+{
+	unsigned char *buf;
+	se_mem_t *se_mem;
+
+	T_TASK(cmd)->t_mem_list = transport_init_se_mem_list();
+	if (!(T_TASK(cmd)->t_mem_list))
+		return -1;
+
+	while (length) {
+		se_mem = kzalloc(sizeof(se_mem_t), GFP_KERNEL);
+		if (!(se_mem)) {
+			printk(KERN_ERR "Unable to allocate se_mem_t\n");
+			goto out;
+		}
+		INIT_LIST_HEAD(&se_mem->se_list);
+		se_mem->se_len = (length > dma_size) ? dma_size : length;
+
+/* #warning FIXME Allocate contigous pages for se_mem_t elements */
+		se_mem->se_page = (struct page *) alloc_pages(GFP_KERNEL, 0);
+		if (!(se_mem->se_page)) {
+			printk(KERN_ERR "alloc_pages() failed\n");
+			goto out;
+		}
+
+		buf = kmap_atomic(se_mem->se_page, KM_IRQ0);
+		if (!(buf)) {
+			printk(KERN_ERR "kmap_atomic() failed\n");
+			goto out;
+		}
+		memset(buf, 0, se_mem->se_len);
+		kunmap_atomic(buf, KM_IRQ0);
+
+		list_add_tail(&se_mem->se_list, T_TASK(cmd)->t_mem_list);
+		T_TASK(cmd)->t_task_se_num++;
+
+		DEBUG_MEM("Allocated se_mem_t page(%p) Length(%u)"
+			" Offset(%u)\n", se_mem->se_page, se_mem->se_len,
+			se_mem->se_off);
+
+		length -= se_mem->se_len;
+	}
+
+	DEBUG_MEM("Allocated total se_mem_t elements(%u)\n",
+			T_TASK(cmd)->t_task_se_num);
+
+	return 0;
+out:
+	return -1;
+}
+
+extern u32 transport_calc_sg_num (
+	se_task_t *task,
+	se_mem_t *in_se_mem,
+	u32 task_offset)
+{
+	se_mem_t *se_mem = in_se_mem;
+	u32 sg_length, sg_offset, task_size = task->task_size;
+	u32 saved_task_offset = 0;
+
+	while (task_size) {
+		DEBUG_SC("se_mem->se_page(%p) se_mem->se_len(%u)"
+			" se_mem->se_off(%u) task_offset(%u)\n",
+			se_mem->se_page, se_mem->se_len,
+			se_mem->se_off, task_offset);
+
+		if (task_offset == 0) {
+			if (task_size > se_mem->se_len)
+				sg_length = se_mem->se_len;
+			else
+				sg_length = task_size;
+
+			DEBUG_SC("sg_length(%u) task_size(%u)\n",
+					sg_length, task_size);
+
+			if (saved_task_offset)
+				task_offset = saved_task_offset;
+		} else {
+			sg_offset = task_offset;
+
+			if ((se_mem->se_len - task_offset) > task_size)
+				sg_length = task_size;
+			else
+				sg_length = (se_mem->se_len - task_offset);
+
+			DEBUG_SC("sg_length(%u) task_size(%u)\n",
+					sg_length, task_size);
+
+			saved_task_offset = task_offset;
+			task_offset = 0;
+		}
+		task_size -= sg_length;
+
+		DEBUG_SC("task[%u] - Reducing task_size to(%u)\n",
+			task->task_no, task_size);
+
+		task->task_sg_num++;
+
+		list_for_each_entry_continue(se_mem,
+				task->task_se_cmd->t_task->t_mem_list, se_list)
+			break;
+
+		if (!se_mem)
+			break;
+	}
+
+	task->task_sg = kzalloc(task->task_sg_num *
+			sizeof(struct scatterlist), GFP_KERNEL);
+	if (!(task->task_sg)) {
+		printk(KERN_ERR "Unable to allocate memory for"
+				" task->task_sg\n");
+		return 0;
+	}
+
+	sg_init_table(&task->task_sg[0], task->task_sg_num);
+
+	DEBUG_SC("Successfully allocated task->task_sg_num(%u)\n",
+			task->task_sg_num);
+
+	return task->task_sg_num;
+}
+
+static inline int transport_set_task_sectors_disk(
+	se_task_t *task,
+	se_obj_lun_type_t *obj_api,
+	void *obj_ptr,
+	unsigned long long lba,
+	u32 sectors,
+	int *max_sectors_set)
+{
+	if ((lba + sectors) > obj_api->end_lba(obj_ptr, 1)) {
+		task->task_sectors = ((obj_api->end_lba(obj_ptr, 1) - lba) + 1);
+
+		if (task->task_sectors > obj_api->max_sectors(obj_ptr)) {
+			task->task_sectors = obj_api->max_sectors(obj_ptr);
+			*max_sectors_set = 1;
+		}
+	} else {
+		if (sectors > obj_api->max_sectors(obj_ptr)) {
+			task->task_sectors = obj_api->max_sectors(obj_ptr);
+			*max_sectors_set = 1;
+		} else
+			task->task_sectors = sectors;
+	}
+
+	return 0;
+}
+
+static inline int transport_set_task_sectors_non_disk(
+	se_task_t *task,
+	se_obj_lun_type_t *obj_api,
+	void *obj_ptr,
+	unsigned long long lba,
+	u32 sectors,
+	int *max_sectors_set)
+{
+	if (sectors > obj_api->max_sectors(obj_ptr)) {
+		task->task_sectors = obj_api->max_sectors(obj_ptr);
+		*max_sectors_set = 1;
+	} else
+		task->task_sectors = sectors;
+
+	return 0;
+}
+
+static inline int transport_set_task_sectors(
+	se_task_t *task,
+	se_obj_lun_type_t *obj_api,
+	void *obj_ptr,
+	unsigned long long lba,
+	u32 sectors,
+	int *max_sectors_set)
+{
+	return (obj_api->get_device_type(obj_ptr) == TYPE_DISK)	?
+		transport_set_task_sectors_disk(task, obj_api, obj_ptr,
+				lba, sectors, max_sectors_set) :
+		transport_set_task_sectors_non_disk(task, obj_api, obj_ptr,
+				lba, sectors, max_sectors_set);
+}
+
+int transport_map_sg_to_mem(
+	se_task_t *task,
+	struct list_head *se_mem_list,
+	void *in_mem,
+	se_mem_t *in_se_mem,
+	se_mem_t **out_se_mem,
+	u32 *se_mem_cnt,
+	u32 *task_offset)
+{
+	se_mem_t *se_mem;
+	struct scatterlist *sg_s;
+	u32 j = 0, saved_task_offset = 0, task_size = task->task_size;
+
+	if (!in_mem) {
+		printk(KERN_ERR "No source scatterlist\n");
+		return -1;
+	}
+	sg_s = (struct scatterlist *)in_mem;
+
+	while (task_size) {
+		se_mem = kzalloc(sizeof(se_mem_t), GFP_KERNEL);
+		if (!(se_mem)) {
+			printk(KERN_ERR "Unable to allocate se_mem_t\n");
+			return -1;
+		}
+		INIT_LIST_HEAD(&se_mem->se_list);
+
+		if (*task_offset == 0) {
+			se_mem->se_page = sg_page(&sg_s[j]);
+			se_mem->se_off = sg_s[j].offset;
+
+			if (task_size >= sg_s[j].length)
+				se_mem->se_len =  sg_s[j++].length;
+			else {
+				se_mem->se_len = task_size;
+
+				task_size -= se_mem->se_len;
+				if (!(task_size)) {
+					*task_offset = (se_mem->se_len +
+							saved_task_offset);
+					goto next;
+				}
+			}
+
+			if (saved_task_offset)
+				*task_offset = saved_task_offset;
+		} else {
+			se_mem->se_page = sg_page(&sg_s[j]);
+			se_mem->se_off = (*task_offset + sg_s[j].offset);
+
+			if ((sg_s[j].length - *task_offset) > task_size) {
+				 se_mem->se_len = task_size;
+
+				task_size -= se_mem->se_len;
+				if (!(task_size)) {
+					*task_offset += se_mem->se_len;
+					goto next;
+				}
+			} else
+				se_mem->se_len = (sg_s[j++].length -
+						*task_offset);
+
+			saved_task_offset = *task_offset;
+			*task_offset = 0;
+		}
+		task_size -= se_mem->se_len;
+next:
+		list_add_tail(&se_mem->se_list, se_mem_list);
+		(*se_mem_cnt)++;
+	}
+
+	DEBUG_MEM("task[%u] - Mapped(%u) struct scatterlist segments to(%u)"
+		" se_mem_t\n", task->task_no, j, *se_mem_cnt);
+
+	return 0;
+}
+
+int transport_map_mem_to_mem(
+	se_task_t *task,
+	struct list_head *se_mem_list,
+	void *in_mem,
+	se_mem_t *in_se_mem,
+	se_mem_t **out_se_mem,
+	u32 *se_mem_cnt,
+	u32 *task_offset)
+{
+	se_mem_t *se_mem = in_se_mem, *se_mem_new;
+	u32 saved_task_offset = 0, task_size = task->task_size;
+
+	if (!se_mem) {
+		printk(KERN_ERR "Invalid se_mem_t pointer\n");
+		return -1;
+	}
+
+	while (task_size) {
+		se_mem_new = kzalloc(sizeof(se_mem_t), GFP_KERNEL);
+		if (!(se_mem_new)) {
+			printk(KERN_ERR "Unable to allocate se_mem_t\n");
+			return -1;
+		}
+		INIT_LIST_HEAD(&se_mem_new->se_list);
+
+		if (*task_offset == 0) {
+			se_mem_new->se_page = se_mem->se_page;
+			se_mem_new->se_off = se_mem->se_off;
+
+			if (task_size >= se_mem->se_len) {
+				se_mem_new->se_len = se_mem->se_len;
+
+				se_mem = list_entry(se_mem->se_list.next,
+							se_mem_t, se_list);
+				if (!(se_mem)) {
+					printk(KERN_ERR "Unable to locate next"
+							" se_mem_t\n");
+					return -1;
+				}
+			} else {
+				se_mem_new->se_len = task_size;
+
+				task_size -= se_mem_new->se_len;
+				if (!(task_size)) {
+					*task_offset = (se_mem_new->se_len +
+							saved_task_offset);
+					goto next;
+				}
+			}
+
+			if (saved_task_offset)
+				*task_offset = saved_task_offset;
+		} else {
+			se_mem_new->se_page = se_mem->se_page;
+			se_mem_new->se_off = (*task_offset + se_mem->se_off);
+
+			if ((se_mem->se_len - *task_offset) > task_size) {
+				se_mem_new->se_len = task_size;
+
+				if (!(task_size -= se_mem_new->se_len)) {
+					*task_offset += se_mem_new->se_len;
+					goto next;
+				}
+			} else {
+				se_mem_new->se_len = (se_mem->se_len -
+							*task_offset);
+
+				se_mem = list_entry(se_mem->se_list.next,
+							se_mem_t, se_list);
+				if (!(se_mem)) {
+					printk(KERN_ERR "Unable to locate next"
+							" se_mem_t\n");
+					return -1;
+				}
+			}
+
+			saved_task_offset = *task_offset;
+			*task_offset = 0;
+		}
+		task_size -= se_mem_new->se_len;
+next:
+		list_add_tail(&se_mem_new->se_list, se_mem_list);
+		(*se_mem_cnt)++;
+
+		DEBUG_MEM2("task[%u] - se_mem_cnt(%u) se_page(%p) se_off(%u)"
+			" se_len(%u)\n", task->task_no, *se_mem_cnt,
+			se_mem_new->se_page, se_mem_new->se_off,
+			se_mem->se_len);
+		DEBUG_MEM2("task[%u] - Reducing task_size to(%u)\n",
+			task->task_no, task_size);
+	}
+	*out_se_mem = se_mem;
+
+	return 0;
+}
+
+/*	transport_map_mem_to_sg():
+ *
+ *
+ */
+int transport_map_mem_to_sg(
+	se_task_t *task,
+	struct list_head *se_mem_list,
+	void *in_mem,
+	se_mem_t *in_se_mem,
+	se_mem_t **out_se_mem,
+	u32 *se_mem_cnt,
+	u32 *task_offset)
+{
+	se_mem_t *se_mem = in_se_mem;
+	struct scatterlist *sg = (struct scatterlist *)in_mem;
+	u32 saved_task_offset = 0, sg_no = 0;
+	u32 task_size = task->task_size;
+
+	if (!sg) {
+		printk(KERN_ERR "Unable to locate valid struct"
+				" scatterlist pointer\n");
+		return -1;
+	}
+
+	while (task_size) {
+		if (*task_offset == 0) {
+			sg_assign_page(&sg[sg_no], se_mem->se_page);
+			sg[sg_no].offset = se_mem->se_off;
+
+			if (task_size >= se_mem->se_len) {
+				sg[sg_no].length = se_mem->se_len;
+
+				se_mem = list_entry(se_mem->se_list.next,
+							se_mem_t, se_list);
+				if (!(se_mem)) {
+					printk(KERN_ERR "Unable to locate"
+						" next se_mem_t\n");
+					return -1;
+				}
+				(*se_mem_cnt)++;
+			} else {
+				sg[sg_no].length = task_size;
+				/*
+				 * Determine if we need to calculate an offset
+				 * into the se_mem_t on the next go around..
+				 */
+				task_size -= sg[sg_no].length;
+				if (!(task_size)) {
+					*task_offset = (sg[sg_no].length +
+							saved_task_offset);
+					goto next;
+				}
+			}
+
+			if (saved_task_offset)
+				*task_offset = saved_task_offset;
+		} else {
+			sg_assign_page(&sg[sg_no], se_mem->se_page);
+			sg[sg_no].offset = (*task_offset + se_mem->se_off);
+
+			if ((se_mem->se_len - *task_offset) > task_size) {
+				sg[sg_no].length = task_size;
+				/*
+				 * Determine if we need to calculate an offset
+				 * into the se_mem_t on the next go around..
+				 */
+				task_size -= sg[sg_no].length;
+				if (!(task_size)) {
+					*task_offset += sg[sg_no].length;
+					goto next;
+				}
+			} else {
+				sg[sg_no].length = (se_mem->se_len -
+						*task_offset);
+
+				se_mem = list_entry(se_mem->se_list.next,
+						se_mem_t, se_list);
+				if (!(se_mem)) {
+					printk(KERN_ERR "Unable to locate"
+						" next se_mem_t\n");
+					return -1;
+				}
+				(*se_mem_cnt)++;
+			}
+
+			saved_task_offset = *task_offset;
+			*task_offset = 0;
+		}
+		task_size -= sg[sg_no].length;
+next:
+		DEBUG_MEM("task[%u] - sg[%u](%p)(%u)(%u) - Reducing task_size"
+			" to(%u)\n", task->task_no, sg_no,
+			sg_page(&sg[sg_no]), sg[sg_no].length,
+			sg[sg_no].offset, task_size);
+
+		sg_no++;
+	}
+	*out_se_mem = se_mem;
+	task->task_sg_num = sg_no;
+
+	DEBUG_MEM("task[%u] - Mapped(%u) se_mem_t segments to total(%u) SGs"
+		" saved task_offset(%u)\n", task->task_no, *se_mem_cnt,
+			sg_no, *task_offset);
+
+	return 0;
+}
+
+u32 transport_generic_get_cdb_count(
+	se_cmd_t *cmd,
+	se_transform_info_t *ti,
+	se_obj_lun_type_t *head_obj_api,
+	void *head_obj_ptr,
+	unsigned long long starting_lba,
+	u32 sectors,
+	se_mem_t *se_mem_in,
+	se_mem_t **se_mem_out,
+	u32 *task_offset_in)
+{
+	unsigned char *cdb = NULL;
+	void *obj_ptr, *next_obj_ptr = NULL;
+	se_task_t *task;
+	se_mem_t *se_mem, *se_mem_lout = NULL;
+	se_obj_lun_type_t *obj_api;
+	int max_sectors_set = 0, ret;
+	u32 se_mem_cnt = 0, task_cdbs = 0;
+	unsigned long long lba;
+
+	if (!se_mem_in) {
+		list_for_each_entry(se_mem_in, T_TASK(cmd)->t_mem_list, se_list)
+			break;
+
+		if (!se_mem_in) {
+			printk(KERN_ERR "se_mem_in is NULL\n");
+			return 0;
+		}
+	}
+	se_mem = se_mem_in;
+
+	/*
+	 * Locate the start volume segment in which the received LBA will be
+	 * executed upon.
+	 */
+	head_obj_api->obtain_obj_lock(head_obj_ptr);
+	if (head_obj_api->obj_start(head_obj_ptr, ti, starting_lba) < 0) {
+		head_obj_api->release_obj_lock(head_obj_ptr);
+		return 0;
+	}
+
+	/*
+	 * Locate starting object from original starting_lba.
+	 */
+	lba = ti->ti_lba;
+	obj_api = ti->ti_obj_api;
+	obj_ptr = ti->ti_obj_ptr;
+	DEBUG_VOL("Starting Physical LBA(%llu) for head_obj_api->(%p)\n",
+			lba, head_obj_api);
+
+	while (sectors) {
+		if (!obj_api) {
+			head_obj_api->release_obj_lock(head_obj_ptr);
+			printk(KERN_ERR "obj_api is NULL LBA(%llu)->Sectors"
+				"(%u)\n", lba, sectors);
+			return 0;
+		}
+
+		DEBUG_VOL("ITT[0x%08x] LBA(%llu) SectorsLeft(%u) EOBJ(%llu)\n",
+			CMD_TFO(cmd)->get_task_tag(cmd), lba, sectors,
+			obj_api->end_lba(obj_ptr, 1));
+
+		head_obj_api->release_obj_lock(head_obj_ptr);
+
+		task = cmd->transport_get_task(ti, cmd, obj_ptr, obj_api);
+		if (!(task))
+			goto out;
+
+		transport_set_task_sectors(task, obj_api, obj_ptr, lba,
+				sectors, &max_sectors_set);
+
+		task->task_lba = lba;
+		lba += task->task_sectors;
+		sectors -= task->task_sectors;
+		task->task_size = (task->task_sectors *
+					obj_api->blocksize(obj_ptr));
+		task->transport_map_task =
+			obj_api->get_map_SG(obj_ptr, cmd->data_direction);
+
+		if ((cdb = obj_api->get_cdb(obj_ptr, task))) {
+			memcpy(cdb, T_TASK(cmd)->t_task_cdb, SCSI_CDB_SIZE);
+			cmd->transport_split_cdb(task->task_lba,
+					&task->task_sectors, cdb);
+		}
+
+		/*
+		 * Perform the SE OBJ plugin and/or Transport plugin specific
+		 * mapping for T_TASK(cmd)->t_mem_list.
+		 */
+		ret = obj_api->do_se_mem_map(obj_ptr, task,
+				T_TASK(cmd)->t_mem_list, NULL, se_mem,
+				&se_mem_lout, &se_mem_cnt, task_offset_in);
+		if (ret < 0)
+			goto out;
+
+		head_obj_api->obtain_obj_lock(head_obj_ptr);
+
+		se_mem = se_mem_lout;
+		*se_mem_out = se_mem_lout;
+		task_cdbs++;
+
+		DEBUG_VOL("Incremented task_cdbs(%u) task->task_sg_num(%u)\n",
+				task_cdbs, task->task_sg_num);
+
+		if (max_sectors_set) {
+			max_sectors_set = 0;
+			continue;
+		}
+
+		if (!sectors)
+			break;
+
+		obj_api = obj_api->get_next_obj_api(obj_ptr, &next_obj_ptr);
+		if (obj_api) {
+			obj_ptr = next_obj_ptr;
+			lba = obj_api->get_next_lba(obj_ptr, lba);
+		}
+	}
+	head_obj_api->release_obj_lock(head_obj_ptr);
+
+	if (ti->ti_set_counts) {
+		atomic_inc(&T_TASK(cmd)->t_fe_count);
+		atomic_inc(&T_TASK(cmd)->t_se_count);
+	}
+
+	DEBUG_VOL("ITT[0x%08x] total cdbs(%u)\n",
+		CMD_TFO(cmd)->get_task_tag(cmd), task_cdbs);
+
+	return task_cdbs;
+out:
+	return 0;
+}
+
+/*	 transport_generic_new_cmd(): Called from transport_processing_thread()
+ *
+ *	 Allocate storage transport resources from a set of values predefined
+ *	 by transport_generic_cmd_sequencer() from the iSCSI Target RX process.
+ *	 Any non zero return here is treated as an "out of resource' op here.
+ */
+int transport_generic_new_cmd(se_cmd_t *cmd)
+{
+	int ret = 0;
+	se_transform_info_t ti;
+	/*
+	 * Generate se_task_t(s) and/or their payloads for this CDB.
+	 */
+	memset((void *)&ti, 0, sizeof(se_transform_info_t));
+	ti.ti_se_cmd = cmd;
+	ti.se_obj_ptr = SE_LUN(cmd)->lun_type_ptr;
+	ti.se_obj_api = SE_LUN(cmd)->lun_obj_api;
+
+	if (!(cmd->se_cmd_flags & SCF_CMD_PASSTHROUGH)) {
+/* #warning FIXME v2.8: Get rid of PAGE_SIZE usage */
+		ret = cmd->transport_allocate_resources(cmd, cmd->data_length,
+				PAGE_SIZE);
+		if (ret < 0)
+			goto failure;
+
+		ret = transport_get_sectors(cmd, SE_LUN(cmd)->lun_obj_api,
+					SE_LUN(cmd)->lun_type_ptr);
+		if (ret < 0)
+			goto failure;
+
+		ret = transport_new_cmd_obj(cmd, &ti, SE_LUN(cmd)->lun_obj_api,
+					SE_LUN(cmd)->lun_type_ptr, 0);
+		if (ret < 0)
+			goto failure;
+
+		/*
+		 * Allocate iovecs for frontend mappings.  This currently
+		 * assumes traditional iSCSI going to sockets.
+		 *
+		 * FIXME: This should be specific to frontend protocol/hardware.
+		 */
+		ret = cmd->transport_allocate_iovecs(cmd);
+		if (ret < 0) {
+			ret = PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES;
+			goto failure;
+		}
+	}
+	/*
+	 * This is dependent upon the storage processing algorithm.
+	 */
+	if (cmd->transport_do_transform(cmd, &ti) < 0) {
+		ret = PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES;
+		goto failure;
+	}
+	/*
+	 * Set the correct (usually DMAable) buffer pointers from the master
+	 * buffer list in se_cmd_t to the transport task's native
+	 * buffers format.
+	 */
+	ret = cmd->transport_map_buffers_to_tasks(cmd);
+	if (ret < 0)
+		goto failure;
+	/*
+	 * For WRITEs, let the iSCSI Target RX Thread know its buffer is ready..
+	 * This WRITE se_cmd_t (and all of its associated se_task_t's)
+	 * will be added to the se_device_t execution queue after its WRITE
+	 * data has arrived. (ie: It gets handled by the transport processing
+	 * thread a second time)
+	 */
+	if (cmd->data_direction == SE_DIRECTION_WRITE) {
+		transport_add_tasks_to_state_queue(cmd);
+		return transport_generic_write_pending(cmd);
+	}
+	/*
+	 * Everything else but a WRITE, add the se_cmd_t's se_task_t's
+	 * to the execution queue.
+	 */
+	transport_execute_tasks(cmd);
+	return 0;
+
+failure:
+	return ret;
+}
+
+/*	transport_generic_process_write():
+ *
+ *
+ */
+void transport_generic_process_write(se_cmd_t *cmd)
+{
+#if 0
+	/*
+	 * Copy SCSI Presented DTL sector(s) from received buffers allocated to
+	 * original EDTL
+	 */
+	if (cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
+		if (!T_TASK(cmd)->t_task_se_num) {
+			unsigned char *dst, *buf =
+				(unsigned char *)T_TASK(cmd)->t_task_buf;
+
+			dst = kzalloc(cmd->cmd_spdtl), GFP_KERNEL);
+			if (!(dst)) {
+				printk(KERN_ERR "Unable to allocate memory for"
+						" WRITE underflow\n");
+				transport_generic_request_failure(cmd, NULL,
+					PYX_TRANSPORT_REQ_TOO_MANY_SECTORS, 1);
+				return;
+			}
+			memcpy(dst, buf, cmd->cmd_spdtl);
+
+			kfree(T_TASK(cmd)->t_task_buf);
+			T_TASK(cmd)->t_task_buf = dst;
+		} else {
+			struct scatterlist *sg =
+				(struct scatterlist *sg)T_TASK(cmd)->t_task_buf;
+			struct scatterlist *orig_sg;
+
+			orig_sg = kzalloc(sizeof(struct scatterlist) *
+					T_TASK(cmd)->t_task_se_num,
+					GFP_KERNEL))) {
+			if (!(orig_sg)) {
+				printk(KERN_ERR "Unable to allocate memory"
+						" for WRITE underflow\n");
+				transport_generic_request_failure(cmd, NULL,
+					PYX_TRANSPORT_REQ_TOO_MANY_SECTORS, 1);
+				return;
+			}
+
+			memcpy(orig_sg, T_TASK(cmd)->t_task_buf,
+					sizeof(struct scatterlist) *
+					T_TASK(cmd)->t_task_se_num);
+
+			cmd->data_length = cmd->cmd_spdtl;
+			/*
+			 * FIXME, clear out original se_task_t and state
+			 * information.
+			 */
+			if (transport_generic_new_cmd(cmd) < 0) {
+				transport_generic_request_failure(cmd, NULL,
+					PYX_TRANSPORT_REQ_TOO_MANY_SECTORS, 1);
+				kfree(orig_sg);
+				return;
+			}
+
+			transport_memcpy_write_sg(cmd, orig_sg);
+		}
+	}
+#endif
+	transport_execute_tasks(cmd);
+}
+
+/*	transport_generic_write_pending():
+ *
+ *
+ */
+static int transport_generic_write_pending(se_cmd_t *cmd)
+{
+	unsigned long flags;
+	int ret;
+
+	if (cmd->se_cmd_flags & SCF_CMD_PASSTHROUGH) {
+		if (!(cmd->se_cmd_flags & SCF_CMD_PASSTHROUGH_NOALLOC)) {
+			up(&T_TASK(cmd)->t_transport_passthrough_wsem);
+			transport_cmd_check_stop(cmd, 1, 0);
+			return PYX_TRANSPORT_WRITE_PENDING;
+		}
+
+		transport_generic_process_write(cmd);
+		transport_cmd_check_stop(cmd, 1, 0);
+		return PYX_TRANSPORT_WRITE_PENDING;
+	}
+
+	spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+	cmd->t_state = TRANSPORT_WRITE_PENDING;
+	spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+	/*
+	 * Call the fabric write_pending function here to let the
+	 * frontend know that WRITE buffers are ready.
+	 */
+	ret = CMD_TFO(cmd)->write_pending(cmd);
+	if (ret < 0) {
+		transport_cmd_check_stop(cmd, 1, 0);
+		return ret;
+	}
+
+	transport_cmd_check_stop(cmd, 1, 0);
+	return PYX_TRANSPORT_WRITE_PENDING;
+}
+
+/*	transport_release_cmd_to_pool():
+ *
+ *
+ */
+void transport_release_cmd_to_pool(se_cmd_t *cmd)
+{
+	if (cmd->se_cmd_flags & SCF_CMD_PASSTHROUGH)
+		kfree(cmd->se_lun);
+	/*
+	 * Release se_cmd_t->se_fabric_cmd_ptr in fabric
+	 */
+	CMD_TFO(cmd)->release_cmd_to_pool(cmd);
+
+	transport_free_se_cmd(cmd);
+}
+EXPORT_SYMBOL(transport_release_cmd_to_pool);
+
+/*	transport_generic_free_cmd():
+ *
+ *	Called from processing frontend to release storage engine resources
+ */
+void transport_generic_free_cmd(
+	se_cmd_t *cmd,
+	int wait_for_tasks,
+	int release_to_pool,
+	int session_reinstatement)
+{
+	if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) || !T_TASK(cmd))
+		transport_release_cmd_to_pool(cmd);
+	else {
+		core_dec_lacl_count(cmd->se_sess->se_node_acl, cmd);
+
+		if (SE_LUN(cmd)) {
+#if 0
+			printk(KERN_INFO "cmd: %p ITT: 0x%08x contains"
+				" SE_LUN(cmd)\n", cmd,
+				CMD_TFO(cmd)->get_task_tag(cmd));
+#endif
+			transport_lun_remove_cmd(cmd);
+		}
+
+		if (wait_for_tasks && cmd->transport_wait_for_tasks)
+			cmd->transport_wait_for_tasks(cmd, 0, 0);
+
+		transport_generic_remove(cmd, release_to_pool,
+				session_reinstatement);
+	}
+}
+EXPORT_SYMBOL(transport_generic_free_cmd);
+
+static void transport_nop_wait_for_tasks(
+	se_cmd_t *cmd,
+	int remove_cmd,
+	int session_reinstatement)
+{
+	return;
+}
+
+/*	transport_lun_wait_for_tasks():
+ *
+ *	Called from ConfigFS context to stop the passed se_cmd_t to allow
+ *	an se_lun_t to be successfully shutdown.
+ */
+int transport_lun_wait_for_tasks(se_cmd_t *cmd, se_lun_t *lun)
+{
+	unsigned long flags;
+	/*
+	 * If the frontend has already requested this se_cmd_t to
+	 * be stopped, we can safely ignore this se_cmd_t.
+	 */
+	spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+	if (atomic_read(&T_TASK(cmd)->t_transport_stop)) {
+		atomic_set(&T_TASK(cmd)->transport_lun_stop, 0);
+		DEBUG_TRANSPORT_S("ConfigFS ITT[0x%08x] - t_transport_stop =="
+			" TRUE, skipping\n", CMD_TFO(cmd)->get_task_tag(cmd));
+		spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+		return -1;
+	}
+	spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+	CMD_ORIG_OBJ_API(cmd)->notify_obj(cmd->se_orig_obj_ptr);
+
+	DEBUG_TRANSPORT_S("ConfigFS: ITT[0x%08x] - stopping cmd....\n",
+		CMD_TFO(cmd)->get_task_tag(cmd));
+	down(&T_TASK(cmd)->transport_lun_stop_sem);
+	DEBUG_TRANSPORT_S("ConfigFS: ITT[0x%08x] - stopped cmd....\n",
+		CMD_TFO(cmd)->get_task_tag(cmd));
+
+	spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+	atomic_set(&T_TASK(cmd)->transport_lun_stop, 0);
+	spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+	return 0;
+}
+EXPORT_SYMBOL(transport_lun_wait_for_tasks);
+
+/* #define DEBUG_CLEAR_LUN */
+#ifdef DEBUG_CLEAR_LUN
+#define DEBUG_CLEAR_L(x...) PYXPRINT(x)
+#else
+#define DEBUG_CLEAR_L(x...)
+#endif
+
+void transport_clear_lun_from_sessions(se_lun_t *lun)
+{
+	se_cmd_t *cmd = NULL, *cmd_p = NULL;
+	unsigned long flags;
+	/*
+	 * Do exception processing and return CHECK_CONDITION status to the
+	 * Initiator Port.
+	 */
+	spin_lock_irqsave(&lun->lun_cmd_lock, flags);
+	list_for_each_entry_safe(cmd, cmd_p, &lun->lun_cmd_list, se_lun_list) {
+		if (!(T_TASK(cmd))) {
+			printk(KERN_ERR "ITT: 0x%08x, T_TASK(cmd) = NULL"
+				"[i,t]_state: %u/%u\n",
+				CMD_TFO(cmd)->get_task_tag(cmd),
+				CMD_TFO(cmd)->get_cmd_state(cmd), cmd->t_state);
+			BUG();
+		}
+		list_del(&cmd->se_lun_list);
+		atomic_set(&T_TASK(cmd)->transport_lun_active, 0);
+		/*
+		 * This will notify iscsi_target_transport.c:
+		 * transport_cmd_check_stop() that a LUN shutdown is in
+		 * progress for the iscsi_cmd_t.
+		 */
+		spin_lock(&T_TASK(cmd)->t_state_lock);
+		DEBUG_CLEAR_L("SE_LUN[%d] - Setting T_TASK(cmd)->transport"
+			"_lun_stop for  ITT: 0x%08x\n",
+			SE_LUN(cmd)->unpacked_lun,
+			CMD_TFO(cmd)->get_task_tag(cmd));
+		atomic_set(&T_TASK(cmd)->transport_lun_stop, 1);
+		spin_unlock(&T_TASK(cmd)->t_state_lock);
+
+		spin_unlock_irqrestore(&lun->lun_cmd_lock, flags);
+
+		if (!(SE_LUN(cmd))) {
+			printk(KERN_ERR "ITT: 0x%08x, [i,t]_state: %u/%u\n",
+				CMD_TFO(cmd)->get_task_tag(cmd),
+				CMD_TFO(cmd)->get_cmd_state(cmd), cmd->t_state);
+			BUG();
+		}
+		/*
+		 * If the Storage engine still owns the iscsi_cmd_t, determine
+		 * and/or stop its context.
+		 */
+		DEBUG_CLEAR_L("SE_LUN[%d] - ITT: 0x%08x before transport"
+			"_lun_wait_for_tasks()\n", SE_LUN(cmd)->unpacked_lun,
+			CMD_TFO(cmd)->get_task_tag(cmd));
+
+		if (transport_lun_wait_for_tasks(cmd, SE_LUN(cmd)) < 0) {
+			spin_lock_irqsave(&lun->lun_cmd_lock, flags);
+			continue;
+		}
+
+		DEBUG_CLEAR_L("SE_LUN[%d] - ITT: 0x%08x after transport_lun"
+			"_wait_for_tasks(): SUCCESS\n",
+			SE_LUN(cmd)->unpacked_lun,
+			CMD_TFO(cmd)->get_task_tag(cmd));
+		/*
+		 * The Storage engine stopped this se_cmd_t before it was
+		 * send to the fabric frontend for delivery back to the
+		 * Initiator Node.  Return this SCSI CDB back with an
+		 * CHECK_CONDITION status.
+		 */
+		transport_send_check_condition_and_sense(cmd,
+				NON_EXISTENT_LUN, 0);
+		/*
+		 *  If the fabric frontend is waiting for this iscsi_cmd_t to
+		 * be released, notify the waiting thread now that LU has
+		 * finished accessing it.
+		 */
+		spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+		if (atomic_read(&T_TASK(cmd)->transport_lun_fe_stop)) {
+			DEBUG_CLEAR_L("SE_LUN[%d] - Detected FE stop for"
+				" se_cmd_t: %p ITT: 0x%08x\n",
+				lun->unpacked_lun,
+				cmd, CMD_TFO(cmd)->get_task_tag(cmd));
+
+			spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock,
+					flags);
+			up(&T_TASK(cmd)->transport_lun_fe_stop_sem);
+			spin_lock_irqsave(&lun->lun_cmd_lock, flags);
+			continue;
+		}
+		atomic_set(&T_TASK(cmd)->transport_lun_stop, 0);
+
+		DEBUG_CLEAR_L("SE_LUN[%d] - ITT: 0x%08x finished processing\n",
+			lun->unpacked_lun, CMD_TFO(cmd)->get_task_tag(cmd));
+
+		spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+		spin_lock_irqsave(&lun->lun_cmd_lock, flags);
+	}
+	spin_unlock_irqrestore(&lun->lun_cmd_lock, flags);
+}
+EXPORT_SYMBOL(transport_clear_lun_from_sessions);
+
+/*	transport_generic_wait_for_tasks():
+ *
+ *	Called from frontend or passthrough context to wait for storage engine
+ *	to pause and/or release frontend generated se_cmd_t.
+ */
+static void transport_generic_wait_for_tasks(
+	se_cmd_t *cmd,
+	int remove_cmd,
+	int session_reinstatement)
+{
+	unsigned long flags;
+
+	if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD))
+		return;
+
+	spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+	/*
+	 * If we are already stopped due to an external event (ie: LUN shutdown)
+	 * sleep until the connection can have the passed se_cmd_t back.
+	 * The T_TASK(cmd)->transport_lun_stopped_sem will be upped by
+	 * transport_clear_lun_from_sessions() once the ConfigFS context caller
+	 * has completed its operation on the se_cmd_t.
+	 */
+	if (atomic_read(&T_TASK(cmd)->transport_lun_stop)) {
+		atomic_set(&T_TASK(cmd)->transport_lun_fe_stop, 1);
+
+		DEBUG_TRANSPORT_S("wait_for_tasks: Stopping"
+			" down(&T_TASK(cmd)transport_lun_fe_stop_sem);"
+			" for ITT: 0x%08x\n", CMD_TFO(cmd)->get_task_tag(cmd));
+		/*
+		 * There is a special case for WRITES where a FE exception +
+		 * LUN shutdown means ConfigFS context is still sleeping on
+		 * transport_lun_stop_sem in transport_lun_wait_for_tasks().
+		 * We go ahead and up transport_lun_stop_sem just to be sure
+		 * here.
+		 */
+		spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+		up(&T_TASK(cmd)->transport_lun_stop_sem);
+		down(&T_TASK(cmd)->transport_lun_fe_stop_sem);
+		spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+		/*
+		 * At this point, the frontend who was the originator of this
+		 * se_cmd_t, now owns the structure and can be released through
+		 * normal means below.
+		 */
+		DEBUG_TRANSPORT_S("wait_for_tasks: Stopped"
+			" down(&T_TASK(cmd)transport_lun_fe_stop_sem);"
+			" for ITT: 0x%08x\n", CMD_TFO(cmd)->get_task_tag(cmd));
+
+		atomic_set(&T_TASK(cmd)->transport_lun_fe_stop, 0);
+		atomic_set(&T_TASK(cmd)->transport_lun_stop, 0);
+	}
+	if (!atomic_read(&T_TASK(cmd)->t_transport_active))
+		goto remove;
+
+	atomic_set(&T_TASK(cmd)->t_transport_stop, 1);
+
+	DEBUG_TRANSPORT_S("wait_for_tasks: Stopping %p ITT/CmdSN: 0x%08x/"
+		"0x%08x, i_state/def_i_state: %d/%d, t_state/def_t_state:"
+		" %d/%d, t_transport_stop = TRUE\n", cmd,
+		CMD_TFO(cmd)->get_task_tag(cmd), cmd->cmd_sn,
+		CMD_TFO(cmd)->get_cmd_state(cmd), cmd->deferred_i_state,
+		cmd->t_state, cmd->deferred_t_state);
+
+	spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+	CMD_ORIG_OBJ_API(cmd)->notify_obj(cmd->se_orig_obj_ptr);
+
+	down(&T_TASK(cmd)->t_transport_stop_sem);
+
+	spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+	atomic_set(&T_TASK(cmd)->t_transport_active, 0);
+	atomic_set(&T_TASK(cmd)->t_transport_stop, 0);
+
+	DEBUG_TRANSPORT_S("wait_for_tasks: Stopped down(&T_TASK(cmd)->"
+		"t_transport_stop_sem) for ITT: 0x%08x\n",
+		CMD_TFO(cmd)->get_task_tag(cmd));
+remove:
+	spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+	if (!remove_cmd)
+		return;
+
+	transport_generic_free_cmd(cmd, 0, 0, session_reinstatement);
+}
+
+int transport_send_check_condition_and_sense(
+	se_cmd_t *cmd,
+	u8 reason,
+	int from_transport)
+{
+	unsigned char *buffer = cmd->sense_buffer;
+	unsigned long flags;
+	int offset;
+	u8 asc = 0, ascq = 0;
+
+	spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+	if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) {
+		spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+		return 0;
+	}
+	cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION;
+	spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+	if (!reason && from_transport)
+		goto after_reason;
+
+	if (!from_transport)
+		cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE;
+	/*
+	 * Data Segment and SenseLength of the fabric response PDU.
+	 *
+	 * TRANSPORT_SENSE_BUFFER is now set to SCSI_SENSE_BUFFERSIZE
+	 * from include/scsi/scsi_cmnd.h
+	 */
+	offset = CMD_TFO(cmd)->set_fabric_sense_len(cmd,
+				TRANSPORT_SENSE_BUFFER);
+	/*
+	 * Actual SENSE DATA, see SPC-3 7.23.2  SPC_SENSE_KEY_OFFSET uses
+	 * SENSE KEY values from include/scsi/scsi.h
+	 */
+	switch (reason) {
+	case NON_EXISTENT_LUN:
+	case UNSUPPORTED_SCSI_OPCODE:
+	case SECTOR_COUNT_TOO_MANY:
+		/* CURRENT ERROR */
+		buffer[offset] = 0x70;
+		/* ILLEGAL REQUEST */
+		buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
+		/* INVALID COMMAND OPERATION CODE */
+		buffer[offset+SPC_ASC_KEY_OFFSET] = 0x20;
+		break;
+	case UNKNOWN_MODE_PAGE:
+		/* CURRENT ERROR */
+		buffer[offset] = 0x70;
+		/* ILLEGAL REQUEST */
+		buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
+		/* INVALID FIELD IN CDB */
+		buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24;
+		break;
+	case CHECK_CONDITION_ABORT_CMD:
+		/* CURRENT ERROR */
+		buffer[offset] = 0x70;
+		/* ABORTED COMMAND */
+		buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
+		/* BUS DEVICE RESET FUNCTION OCCURRED */
+		buffer[offset+SPC_ASC_KEY_OFFSET] = 0x29;
+		buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x03;
+		break;
+	case INCORRECT_AMOUNT_OF_DATA:
+		/* CURRENT ERROR */
+		buffer[offset] = 0x70;
+		/* ABORTED COMMAND */
+		buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
+		/* WRITE ERROR */
+		buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c;
+		/* NOT ENOUGH UNSOLICITED DATA */
+		buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0d;
+		break;
+	case INVALID_CDB_FIELD:
+		/* CURRENT ERROR */
+		buffer[offset] = 0x70;
+		/* ABORTED COMMAND */
+		buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
+		/* INVALID FIELD IN CDB */
+		buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24;
+		break;
+	case INVALID_PARAMETER_LIST:
+		/* CURRENT ERROR */
+		buffer[offset] = 0x70;
+		/* ABORTED COMMAND */
+		buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
+		/* INVALID FIELD IN PARAMETER LIST */
+		buffer[offset+SPC_ASC_KEY_OFFSET] = 0x26;
+		break;
+	case UNEXPECTED_UNSOLICITED_DATA:
+		/* CURRENT ERROR */
+		buffer[offset] = 0x70;
+		/* ABORTED COMMAND */
+		buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
+		/* WRITE ERROR */
+		buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c;
+		/* UNEXPECTED_UNSOLICITED_DATA */
+		buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0c;
+		break;
+	case SERVICE_CRC_ERROR:
+		/* CURRENT ERROR */
+		buffer[offset] = 0x70;
+		/* ABORTED COMMAND */
+		buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
+		/* PROTOCOL SERVICE CRC ERROR */
+		buffer[offset+SPC_ASC_KEY_OFFSET] = 0x47;
+		/* N/A */
+		buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x05;
+		break;
+	case SNACK_REJECTED:
+		/* CURRENT ERROR */
+		buffer[offset] = 0x70;
+		/* ABORTED COMMAND */
+		buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
+		/* READ ERROR */
+		buffer[offset+SPC_ASC_KEY_OFFSET] = 0x11;
+		/* FAILED RETRANSMISSION REQUEST */
+		buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x13;
+		break;
+	case WRITE_PROTECTED:
+		/* CURRENT ERROR */
+		buffer[offset] = 0x70;
+		/* DATA PROTECT */
+		buffer[offset+SPC_SENSE_KEY_OFFSET] = DATA_PROTECT;
+		/* WRITE PROTECTED */
+		buffer[offset+SPC_ASC_KEY_OFFSET] = 0x27;
+		break;
+	case CHECK_CONDITION_UNIT_ATTENTION:
+		/* CURRENT ERROR */
+		buffer[offset] = 0x70;
+		/* UNIT ATTENTION */
+		buffer[offset+SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION;
+		core_scsi3_ua_for_check_condition(cmd, &asc, &ascq);
+		buffer[offset+SPC_ASC_KEY_OFFSET] = asc;
+		buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq;
+		break;
+	case LOGICAL_UNIT_COMMUNICATION_FAILURE:
+	default:
+		/* CURRENT ERROR */
+		buffer[offset] = 0x70;
+		/* ILLEGAL REQUEST */
+		buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
+		/* LOGICAL UNIT COMMUNICATION FAILURE */
+		buffer[offset+SPC_ASC_KEY_OFFSET] = 0x80;
+		break;
+	}
+	/*
+	 * This code uses linux/include/scsi/scsi.h SAM status codes!
+	 */
+	cmd->scsi_status = SAM_STAT_CHECK_CONDITION;
+	/*
+	 * Automatically padded, this value is encoded in the fabric's
+	 * data_length response PDU containing the SCSI defined sense data.
+	 */
+	cmd->scsi_sense_length  = TRANSPORT_SENSE_BUFFER + offset;
+
+after_reason:
+	if (!(cmd->se_cmd_flags & SCF_CMD_PASSTHROUGH))
+		CMD_TFO(cmd)->queue_status(cmd);
+
+	return 0;
+}
+EXPORT_SYMBOL(transport_send_check_condition_and_sense);
+
+void transport_send_task_abort(se_cmd_t *cmd)
+{
+	cmd->scsi_status = SAM_STAT_TASK_ABORTED;
+#if 0
+	printk(KERN_INFO "Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x,"
+		" ITT: 0x%08x\n", T_TASK(cmd)->t_task_cdb[0],
+		CMD_TFO(cmd)->get_task_tag(cmd));
+#endif
+	if (!(cmd->se_cmd_flags & SCF_CMD_PASSTHROUGH))
+		CMD_TFO(cmd)->queue_status(cmd);
+}
+
+/*	transport_generic_do_tmr():
+ *
+ *
+ */
+int transport_generic_do_tmr(se_cmd_t *cmd)
+{
+	se_cmd_t *ref_cmd;
+	se_device_t *dev = SE_DEV(cmd);
+	se_tmr_req_t *tmr = cmd->se_tmr_req;
+	int ret;
+
+	switch (tmr->function) {
+	case ABORT_TASK:
+		ref_cmd = tmr->ref_cmd;
+		tmr->response = TMR_FUNCTION_REJECTED;
+		break;
+	case ABORT_TASK_SET:
+	case CLEAR_ACA:
+	case CLEAR_TASK_SET:
+		tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED;
+		break;
+	case LUN_RESET:
+		ret = core_tmr_lun_reset(dev, tmr, NULL, NULL);
+		tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE :
+					 TMR_FUNCTION_REJECTED;
+		break;
+#if 0
+	case TARGET_WARM_RESET:
+		transport_generic_host_reset(dev->se_hba);
+		tmr->response = TMR_FUNCTION_REJECTED;
+		break;
+	case TARGET_COLD_RESET:
+		transport_generic_host_reset(dev->se_hba);
+		transport_generic_cold_reset(dev->se_hba);
+		tmr->response = TMR_FUNCTION_REJECTED;
+		break;
+#endif
+	default:
+		printk(KERN_ERR "Uknown TMR function: 0x%02x.\n",
+				tmr->function);
+		tmr->response = TMR_FUNCTION_REJECTED;
+		break;
+	}
+
+	cmd->t_state = TRANSPORT_ISTATE_PROCESSING;
+	CMD_TFO(cmd)->queue_tm_rsp(cmd);
+
+	return 0;
+}
+
+/*
+ *	Called with spin_lock_irq(&dev->execute_task_lock); held
+ *
+ */
+se_task_t *transport_get_task_from_state_list(se_device_t *dev)
+{
+	se_task_t *task;
+
+	if (list_empty(&dev->state_task_list))
+		return NULL;
+
+	list_for_each_entry(task, &dev->state_task_list, t_state_list)
+		break;
+
+	list_del(&task->t_state_list);
+	atomic_set(&task->task_state_active, 0);
+
+	return task;
+}
+
+static void transport_processing_shutdown(se_device_t *dev)
+{
+	se_cmd_t *cmd;
+	se_queue_req_t *qr;
+	se_task_t *task;
+	u8 state;
+	unsigned long flags;
+	/*
+	 * Empty the se_device_t's se_task_t state list.
+	 */
+	spin_lock_irqsave(&dev->execute_task_lock, flags);
+	while ((task = transport_get_task_from_state_list(dev))) {
+		if (!(TASK_CMD(task))) {
+			printk(KERN_ERR "TASK_CMD(task) is NULL!\n");
+			continue;
+		}
+		cmd = TASK_CMD(task);
+
+		if (!T_TASK(cmd)) {
+			printk(KERN_ERR "T_TASK(cmd) is NULL for task: %p cmd:"
+				" %p ITT: 0x%08x\n", task, cmd,
+				CMD_TFO(cmd)->get_task_tag(cmd));
+			continue;
+		}
+		spin_unlock_irqrestore(&dev->execute_task_lock, flags);
+
+		spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+
+		DEBUG_DO("PT: cmd: %p task: %p ITT/CmdSN: 0x%08x/0x%08x,"
+			" i_state/def_i_state: %d/%d, t_state/def_t_state:"
+			" %d/%d cdb: 0x%02x\n", cmd, task,
+			CMD_TFO(cmd)->get_task_tag(cmd), cmd->cmd_sn,
+			CMD_TFO(cmd)->get_cmd_state(cmd), cmd->deferred_i_state,
+			cmd->t_state, cmd->deferred_t_state,
+			T_TASK(cmd)->t_task_cdb[0]);
+		DEBUG_DO("PT: ITT[0x%08x] - t_task_cdbs: %d t_task_cdbs_left:"
+			" %d t_task_cdbs_sent: %d -- t_transport_active: %d"
+			" t_transport_stop: %d t_transport_sent: %d\n",
+			CMD_TFO(cmd)->get_task_tag(cmd),
+			T_TASK(cmd)->t_task_cdbs,
+			atomic_read(&T_TASK(cmd)->t_task_cdbs_left),
+			atomic_read(&T_TASK(cmd)->t_task_cdbs_sent),
+			atomic_read(&T_TASK(cmd)->t_transport_active),
+			atomic_read(&T_TASK(cmd)->t_transport_stop),
+			atomic_read(&T_TASK(cmd)->t_transport_sent));
+
+		if (atomic_read(&task->task_active)) {
+			atomic_set(&task->task_stop, 1);
+			spin_unlock_irqrestore(
+				&T_TASK(cmd)->t_state_lock, flags);
+
+			DEBUG_DO("Waiting for task: %p to shutdown for dev:"
+				" %p\n", task, dev);
+			down(&task->task_stop_sem);
+			DEBUG_DO("Completed task: %p shutdown for dev: %p\n",
+				task, dev);
+
+			spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+			atomic_dec(&T_TASK(cmd)->t_task_cdbs_left);
+
+			atomic_set(&task->task_active, 0);
+			atomic_set(&task->task_stop, 0);
+		}
+		__transport_stop_task_timer(task, &flags);
+
+		if (!(atomic_dec_and_test(&T_TASK(cmd)->t_task_cdbs_ex_left))) {
+			spin_unlock_irqrestore(
+					&T_TASK(cmd)->t_state_lock, flags);
+
+			DEBUG_DO("Skipping task: %p, dev: %p for"
+				" t_task_cdbs_ex_left: %d\n", task, dev,
+				atomic_read(&T_TASK(cmd)->t_task_cdbs_ex_left));
+
+			spin_lock_irqsave(&dev->execute_task_lock, flags);
+			continue;
+		}
+
+		if (atomic_read(&T_TASK(cmd)->t_transport_active)) {
+			DEBUG_DO("got t_transport_active = 1 for task: %p, dev:"
+					" %p\n", task, dev);
+
+			if (atomic_read(&T_TASK(cmd)->t_fe_count)) {
+				spin_unlock_irqrestore(
+					&T_TASK(cmd)->t_state_lock, flags);
+				transport_send_check_condition_and_sense(
+					cmd, LOGICAL_UNIT_COMMUNICATION_FAILURE,
+					0);
+				transport_remove_cmd_from_queue(cmd,
+					CMD_ORIG_OBJ_API(cmd)->get_queue_obj(
+						cmd->se_orig_obj_ptr));
+
+				transport_lun_remove_cmd(cmd);
+				if (!(transport_cmd_check_stop(cmd, 1, 0)))
+					transport_passthrough_check_stop(cmd);
+			} else {
+				spin_unlock_irqrestore(
+					&T_TASK(cmd)->t_state_lock, flags);
+
+				transport_remove_cmd_from_queue(cmd,
+					CMD_ORIG_OBJ_API(cmd)->get_queue_obj(
+						cmd->se_orig_obj_ptr));
+
+				transport_lun_remove_cmd(cmd);
+
+				if (!(transport_cmd_check_stop(cmd, 1, 0)))
+					transport_passthrough_check_stop(cmd);
+				else
+					transport_generic_remove(cmd, 0, 0);
+			}
+
+			spin_lock_irqsave(&dev->execute_task_lock, flags);
+			continue;
+		}
+		DEBUG_DO("Got t_transport_active = 0 for task: %p, dev: %p\n",
+				task, dev);
+
+		if (atomic_read(&T_TASK(cmd)->t_fe_count)) {
+			spin_unlock_irqrestore(
+				&T_TASK(cmd)->t_state_lock, flags);
+			transport_send_check_condition_and_sense(cmd,
+				LOGICAL_UNIT_COMMUNICATION_FAILURE, 0);
+			transport_remove_cmd_from_queue(cmd,
+				CMD_ORIG_OBJ_API(cmd)->get_queue_obj(
+					cmd->se_orig_obj_ptr));
+
+			transport_lun_remove_cmd(cmd);
+			if (!(transport_cmd_check_stop(cmd, 1, 0)))
+				transport_passthrough_check_stop(cmd);
+		} else {
+			spin_unlock_irqrestore(
+				&T_TASK(cmd)->t_state_lock, flags);
+
+			transport_remove_cmd_from_queue(cmd,
+				CMD_ORIG_OBJ_API(cmd)->get_queue_obj(
+					cmd->se_orig_obj_ptr));
+			transport_lun_remove_cmd(cmd);
+
+			if (!(transport_cmd_check_stop(cmd, 1, 0)))
+				transport_passthrough_check_stop(cmd);
+			else
+				transport_generic_remove(cmd, 0, 0);
+		}
+
+		spin_lock_irqsave(&dev->execute_task_lock, flags);
+	}
+	spin_unlock_irqrestore(&dev->execute_task_lock, flags);
+	/*
+	 * Empty the se_device_t's se_cmd_t list.
+	 */
+	spin_lock_irqsave(&dev->dev_queue_obj->cmd_queue_lock, flags);
+	while ((qr = __transport_get_qr_from_queue(dev->dev_queue_obj))) {
+		spin_unlock_irqrestore(
+				&dev->dev_queue_obj->cmd_queue_lock, flags);
+		cmd = (se_cmd_t *)qr->cmd;
+		state = qr->state;
+		kfree(qr);
+
+		DEBUG_DO("From Device Queue: cmd: %p t_state: %d\n",
+				cmd, state);
+
+		if (atomic_read(&T_TASK(cmd)->t_fe_count)) {
+			transport_send_check_condition_and_sense(cmd,
+				LOGICAL_UNIT_COMMUNICATION_FAILURE, 0);
+
+			transport_lun_remove_cmd(cmd);
+			if (!(transport_cmd_check_stop(cmd, 1, 0)))
+				transport_passthrough_check_stop(cmd);
+		} else {
+			transport_lun_remove_cmd(cmd);
+
+			if (!(transport_cmd_check_stop(cmd, 1, 0)))
+				transport_passthrough_check_stop(cmd);
+			else
+				transport_generic_remove(cmd, 0, 0);
+		}
+		spin_lock_irqsave(&dev->dev_queue_obj->cmd_queue_lock, flags);
+	}
+	spin_unlock_irqrestore(&dev->dev_queue_obj->cmd_queue_lock, flags);
+}
+
+/*	transport_processing_thread():
+ *
+ *
+ */
+static int transport_processing_thread(void *param)
+{
+	int ret, t_state;
+	se_cmd_t *cmd;
+	se_device_t *dev = (se_device_t *) param;
+	se_queue_req_t *qr;
+
+	current->policy = SCHED_NORMAL;
+	set_user_nice(current, -20);
+	spin_lock_irq(&current->sighand->siglock);
+	siginitsetinv(&current->blocked, SHUTDOWN_SIGS);
+	recalc_sigpending();
+	spin_unlock_irq(&current->sighand->siglock);
+
+	up(&dev->dev_queue_obj->thread_create_sem);
+
+	while (!(kthread_should_stop())) {
+		ret = wait_event_interruptible(dev->dev_queue_obj->thread_wq,
+				atomic_read(&dev->dev_queue_obj->queue_cnt) ||
+				kthread_should_stop());
+		if (ret < 0)
+			goto out;
+
+		spin_lock(&dev->dev_status_lock);
+		if (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) {
+			spin_unlock(&dev->dev_status_lock);
+			transport_processing_shutdown(dev);
+			continue;
+		}
+		spin_unlock(&dev->dev_status_lock);
+
+get_cmd:
+		__transport_execute_tasks(dev);
+
+		qr = transport_get_qr_from_queue(dev->dev_queue_obj);
+		if (!(qr))
+			continue;
+
+		cmd = (se_cmd_t *)qr->cmd;
+		t_state = qr->state;
+		kfree(qr);
+
+		switch (t_state) {
+		case TRANSPORT_NEW_CMD:
+			ret = transport_generic_new_cmd(cmd);
+			if (ret < 0) {
+				cmd->transport_error_status = ret;
+				transport_generic_request_failure(cmd, NULL,
+					0, (cmd->data_direction !=
+					 SE_DIRECTION_WRITE));
+			}
+			break;
+		case TRANSPORT_PROCESS_WRITE:
+			transport_generic_process_write(cmd);
+			break;
+		case TRANSPORT_COMPLETE_OK:
+			transport_stop_all_task_timers(cmd);
+			transport_generic_complete_ok(cmd);
+			break;
+		case TRANSPORT_REMOVE:
+			transport_generic_remove(cmd, 1, 0);
+			break;
+		case TRANSPORT_PROCESS_TMR:
+			transport_generic_do_tmr(cmd);
+			break;
+		case TRANSPORT_COMPLETE_FAILURE:
+			transport_generic_request_failure(cmd, NULL, 1, 1);
+			break;
+		case TRANSPORT_COMPLETE_TIMEOUT:
+			transport_stop_all_task_timers(cmd);
+			transport_generic_request_timeout(cmd);
+			break;
+		default:
+			printk(KERN_ERR "Unknown t_state: %d deferred_t_state:"
+				" %d for ITT: 0x%08x i_state: %d on SE LUN:"
+				" %u\n", t_state, cmd->deferred_t_state,
+				CMD_TFO(cmd)->get_task_tag(cmd),
+				CMD_TFO(cmd)->get_cmd_state(cmd),
+				SE_LUN(cmd)->unpacked_lun);
+			BUG();
+		}
+
+		goto get_cmd;
+	}
+
+out:
+	transport_release_all_cmds(dev);
+	dev->process_thread = NULL;
+	up(&dev->dev_queue_obj->thread_done_sem);
+	return 0;
+}
diff --git a/include/target/target_core_transport.h b/include/target/target_core_transport.h
new file mode 100644
index 0000000..5c586cd
--- /dev/null
+++ b/include/target/target_core_transport.h
@@ -0,0 +1,519 @@
+/*******************************************************************************
+ * Filename:  target_core_transport.h
+ *
+ * This file contains the iSCSI Target Generic DAS Transport Layer definitions.
+ *
+ * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc.
+ * Copyright (c) 2005, 2006, 2007 SBE, Inc.
+ * Copyright (c) 2007-2009 Rising Tide Software, Inc.
+ * Copyright (c) 2008-2009 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@xxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+
+#ifndef TARGET_CORE_TRANSPORT_H
+#define TARGET_CORE_TRANSPORT_H
+
+#define TARGET_CORE_VERSION			"v3.0.0"
+
+/* Attempts before moving from SHORT to LONG */
+#define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD	3
+#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT	3  /* In milliseconds */
+#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG	10 /* In milliseconds */
+
+#define PYX_TRANSPORT_STATUS_INTERVAL		5 /* In seconds */
+
+#define PYX_TRANSPORT_SENT_TO_TRANSPORT		0
+#define PYX_TRANSPORT_WRITE_PENDING		1
+
+#define PYX_TRANSPORT_UNKNOWN_SAM_OPCODE	-1
+#define PYX_TRANSPORT_HBA_QUEUE_FULL		-2
+#define PYX_TRANSPORT_REQ_TOO_MANY_SECTORS	-3
+#define PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES	-4
+#define PYX_TRANSPORT_INVALID_CDB_FIELD		-5
+#define PYX_TRANSPORT_INVALID_PARAMETER_LIST	-6
+#define PYX_TRANSPORT_LOGICAL_UNIT_COMMUNICATION_FAILURE -7
+#define PYX_TRANSPORT_UNKNOWN_MODE_PAGE		-8
+#define PYX_TRANSPORT_WRITE_PROTECTED		-9
+#define PYX_TRANSPORT_TASK_TIMEOUT		-10
+#define PYX_TRANSPORT_RESERVATION_CONFLICT	-11
+
+#ifndef SAM_STAT_RESERVATION_CONFLICT
+#define SAM_STAT_RESERVATION_CONFLICT		0x18
+#endif
+
+#define TRANSPORT_PLUGIN_FREE			0
+#define TRANSPORT_PLUGIN_REGISTERED		1
+
+#define TRANSPORT_PLUGIN_PHBA_PDEV		1
+#define TRANSPORT_PLUGIN_VHBA_PDEV		2
+#define TRANSPORT_PLUGIN_VHBA_VDEV		3
+
+/* For SE OBJ Plugins, in seconds */
+#define TRANSPORT_TIMEOUT_TUR			10
+#define TRANSPORT_TIMEOUT_TYPE_DISK		60
+#define TRANSPORT_TIMEOUT_TYPE_ROM		120
+#define TRANSPORT_TIMEOUT_TYPE_TAPE		600
+#define TRANSPORT_TIMEOUT_TYPE_OTHER		300
+
+/* For se_task->task_state_flags */
+#define TSF_EXCEPTION_CLEARED			0x01
+
+/*
+ * se_subsystem_dev_t->su_dev_flags
+*/
+#define SDF_FIRMWARE_VPD_UNIT_SERIAL		0x00000001
+#define SDF_EMULATED_VPD_UNIT_SERIAL		0x00000002
+
+/*
+ * se_device_t->dev_flags
+ */
+#define DF_READAHEAD_ACTIVE                     0x00000001
+#define DF_TRANSPORT_DMA_ALLOC			0x00000002
+#define DF_TRANSPORT_BUF_ALLOC			0x00000004
+#define DF_DEV_DEBUG				0x00000008
+#define DF_CLAIMED_BLOCKDEV			0x00000010
+#define DF_PERSISTENT_CLAIMED_BLOCKDEV		0x00000020
+#define DF_READ_ONLY				0x00000040
+#define DF_SPC3_PERSISTENT_RESERVE		0x00000080
+#define DF_SPC2_RESERVATIONS			0x00000100
+
+/* se_dev_attrib_t sanity values */
+/* 10 Minutes, see transport_get_default_task_timeout()  */
+#define DA_TASK_TIMEOUT_MAX			600
+/* Emulation for UNIT ATTENTION Interlock Control */
+#define DA_EMULATE_UA_INTLLCK_CTRL		0
+/* Emulation for TASK_ABORTED status (TAS) by default */
+#define DA_EMULATE_TAS				1
+/* No Emulation for PSCSI by default */
+#define DA_EMULATE_RESERVATIONS			0
+/* No Emulation for PSCSI by default */
+#define DA_EMULATE_ALUA				0
+#define DA_STATUS_MAX_SECTORS_MIN		16
+#define DA_STATUS_MAX_SECTORS_MAX		8192
+
+#define SE_MODE_PAGE_BUF			512
+/* Must match PARAM_UDEV_PATH_LEN */
+#define SE_UDEV_PATH_LEN			256
+
+#define MOD_MAX_SECTORS(ms, bs)			(ms % (PAGE_SIZE / bs))
+
+struct se_mem_s;
+
+extern int init_se_global(void);
+extern void release_se_global(void);
+#ifdef DEBUG_DEV
+extern int __iscsi_debug_dev(se_device_t *);
+#endif
+extern unsigned char *transport_get_iqn_sn(void);
+extern void transport_init_queue_obj(struct se_queue_obj_s *);
+extern void transport_load_plugins(void);
+extern struct se_plugin_s *transport_core_get_plugin_by_name(const char *name);
+extern void transport_check_dev_params_delim(char *, char **);
+extern struct se_session_s *transport_init_session(void);
+extern void __transport_register_session(struct se_portal_group_s *,
+					struct se_node_acl_s *,
+					struct se_session_s *, void *);
+extern void transport_register_session(struct se_portal_group_s *,
+					struct se_node_acl_s *,
+					struct se_session_s *, void *);
+extern void transport_free_session(struct se_session_s *);
+extern void transport_deregister_session_configfs(struct se_session_s *);
+extern void transport_deregister_session(struct se_session_s *);
+extern void transport_task_dev_remove_state(struct se_task_s *,
+						struct se_device_s *);
+extern void transport_cmd_finish_abort(struct se_cmd_s *, int);
+extern void transport_cmd_finish_abort_tmr(struct se_cmd_s *);
+extern int transport_add_cmd_to_queue(struct se_cmd_s *,
+					struct se_queue_obj_s *, u8);
+extern struct se_queue_req_s *__transport_get_qr_from_queue(
+					struct se_queue_obj_s *);
+extern void transport_remove_cmd_from_queue(struct se_cmd_s *,
+					    struct se_queue_obj_s *);
+extern void transport_complete_cmd(se_cmd_t *, int);
+extern void transport_complete_task(struct se_task_s *, int);
+extern void transport_add_task_to_execute_queue(struct se_task_s *,
+						struct se_device_s *);
+extern void transport_add_tasks_from_cmd(struct se_cmd_s *);
+extern struct se_task_s *transport_get_task_from_execute_queue(
+						struct se_device_s *);
+extern se_queue_req_t *transport_get_qr_from_queue(struct se_queue_obj_s *);
+extern int transport_check_device_tcq(se_device_t *, u32, u32);
+unsigned char *transport_dump_cmd_direction (struct se_cmd_s *);
+extern void transport_dump_dev_state(struct se_device_s *, char *, int *);
+extern void transport_dump_dev_info(struct se_device_s *, struct se_lun_s *,
+					unsigned long long, char *, int *);
+extern void transport_dump_vpd_proto_id(struct t10_vpd_s *,
+					unsigned char *, int);
+extern int transport_dump_vpd_assoc(struct t10_vpd_s *,
+					unsigned char *, int);
+extern int transport_dump_vpd_ident_type(struct t10_vpd_s *,
+					unsigned char *, int);
+extern int transport_dump_vpd_ident(struct t10_vpd_s *,
+					unsigned char *, int);
+extern se_device_t *transport_add_device_to_core_hba(se_hba_t *,
+					struct se_subsystem_api_s *,
+					struct se_subsystem_dev_s *, u32,
+					void *);
+extern int transport_generic_activate_device(se_device_t *);
+extern void transport_generic_deactivate_device(se_device_t *);
+extern int transport_generic_claim_phydevice(se_device_t *);
+extern void transport_generic_release_phydevice(se_device_t *, int);
+extern void transport_generic_free_device(se_device_t *);
+extern int transport_allocate_iovecs_for_cmd(struct se_cmd_s *, u32);
+extern int transport_generic_obj_start(struct se_transform_info_s *,
+					struct se_obj_lun_type_s *, void *,
+					unsigned long long);
+extern void transport_device_setup_cmd(se_cmd_t *);
+extern se_cmd_t *transport_alloc_se_cmd(struct target_core_fabric_ops *,
+					struct se_session_s *, void *,
+					u32, int);
+extern void transport_free_se_cmd(struct se_cmd_s *);
+extern int transport_generic_allocate_tasks(se_cmd_t *, unsigned char *);
+extern int transport_generic_handle_cdb(se_cmd_t *);
+extern int transport_generic_handle_data(se_cmd_t *);
+extern int transport_generic_handle_tmr(se_cmd_t *);
+extern void transport_stop_tasks_for_cmd(struct se_cmd_s *);
+extern void transport_generic_request_failure(se_cmd_t *, se_device_t *,
+						int, int);
+extern void transport_direct_request_timeout(se_cmd_t *);
+extern void transport_generic_request_timeout(se_cmd_t *);
+extern int transport_generic_allocate_buf(se_cmd_t *, u32, u32);
+extern int __transport_execute_tasks(struct se_device_s *);
+extern void transport_new_cmd_failure(struct se_cmd_s *);
+extern u32 transport_get_default_task_timeout(struct se_device_s *);
+extern void transport_set_supported_SAM_opcode(struct se_cmd_s *);
+extern void transport_start_task_timer(struct se_task_s *);
+extern void __transport_stop_task_timer(struct se_task_s *, unsigned long *);
+extern void transport_stop_task_timer(struct se_task_s *);
+extern void transport_stop_all_task_timers(struct se_cmd_s *);
+extern int transport_execute_tasks(struct se_cmd_s *);
+extern int transport_generic_emulate_inquiry(struct se_cmd_s *, unsigned char,
+					unsigned char *, unsigned char *,
+					unsigned char *);
+extern int transport_generic_emulate_readcapacity(struct se_cmd_s *, u32);
+extern int transport_generic_emulate_readcapacity_16(struct se_cmd_s *,
+							unsigned long long);
+extern int transport_generic_emulate_modesense(struct se_cmd_s *,
+						unsigned char *,
+						unsigned char *, int, int);
+extern int transport_generic_emulate_request_sense(struct se_cmd_s *,
+						   unsigned char *);
+extern int transport_get_sense_data(struct se_cmd_s *);
+extern se_cmd_t *transport_allocate_passthrough(unsigned char *, int, u32,
+						void *, u32, u32,
+						struct se_obj_lun_type_s *,
+						void *);
+extern void transport_passthrough_release(se_cmd_t *);
+extern int transport_passthrough_complete(se_cmd_t *);
+extern int transport_generic_passthrough_async(se_cmd_t *cmd,
+				void(*callback)(se_cmd_t *cmd,
+				void *callback_arg, int complete_status),
+				void *callback_arg);
+extern int transport_generic_passthrough(se_cmd_t *);
+extern void transport_generic_complete_ok(se_cmd_t *);
+extern void transport_free_dev_tasks(se_cmd_t *);
+extern void transport_release_tasks(se_cmd_t *);
+extern void transport_release_fe_cmd(se_cmd_t *);
+extern int transport_generic_remove(se_cmd_t *, int, int);
+extern int transport_lun_wait_for_tasks(se_cmd_t *, se_lun_t *);
+extern void transport_clear_lun_from_sessions(se_lun_t *);
+extern int transport_send_check_condition_and_sense(se_cmd_t *, u8, int);
+extern void transport_send_task_abort(struct se_cmd_s *);
+extern void transport_release_cmd_to_pool(se_cmd_t *);
+extern void transport_generic_free_cmd(se_cmd_t *, int, int, int);
+extern void transport_generic_wait_for_cmds(se_cmd_t *, int);
+extern int transport_generic_do_transform(struct se_cmd_s *,
+					struct se_transform_info_s *);
+extern int transport_get_sectors(struct se_cmd_s *, struct se_obj_lun_type_s *,
+					void *);
+extern int transport_new_cmd_obj(struct se_cmd_s *,
+				struct se_transform_info_s *,
+				struct se_obj_lun_type_s *, void *, int);
+extern unsigned char *transport_get_vaddr(struct se_mem_s *);
+extern struct list_head *transport_init_se_mem_list(void);
+extern void transport_free_se_mem_list(struct list_head *);
+extern int transport_generic_get_mem(struct se_cmd_s *, u32, u32);
+extern u32 transport_calc_sg_num(struct se_task_s *, struct se_mem_s *, u32);
+extern int transport_map_sg_to_mem(struct se_task_s *, struct list_head *,
+					void *, struct se_mem_s *,
+					struct se_mem_s **, u32 *, u32 *);
+extern int transport_map_mem_to_mem(struct se_task_s *, struct list_head *,
+					void *, struct se_mem_s *,
+					struct se_mem_s **, u32 *, u32 *);
+extern int transport_map_mem_to_sg(struct se_task_s *, struct list_head *,
+					void *, struct se_mem_s *,
+					struct se_mem_s **, u32 *, u32 *);
+extern u32 transport_generic_get_cdb_count(struct se_cmd_s *,
+					struct se_transform_info_s *,
+					struct se_obj_lun_type_s *, void *,
+					unsigned long long, u32,
+					struct se_mem_s *, struct se_mem_s **,
+					u32 *);
+extern int transport_generic_new_cmd(se_cmd_t *);
+extern void transport_generic_process_write(se_cmd_t *);
+extern int transport_generic_do_tmr(se_cmd_t *);
+
+/*
+ * Each se_transport_task_t can have N number of possible se_task_t's
+ * for the storage transport(s) to possibly execute.
+ * Used primarily for splitting up CDBs that exceed the physical storage
+ * HBA's maximum sector count per task.
+ */
+typedef struct se_mem_s {
+	struct page	*se_page;
+	u32		se_len;
+	u32		se_off;
+	struct list_head se_list;
+} ____cacheline_aligned se_mem_t;
+
+/*
+ * Each type of DAS transport that uses the generic command sequencer needs
+ * each of the following function pointers set.
+ */
+typedef struct se_subsystem_spc_s {
+	int (*inquiry)(se_task_t *, u32);
+	int (*none)(se_task_t *, u32);
+	int (*read_non_SG)(se_task_t *, u32);
+	int (*read_SG)(se_task_t *, u32);
+	int (*write_non_SG)(se_task_t *, u32);
+	int (*write_SG)(se_task_t *, u32);
+} se_subsystem_spc_t;
+
+/*
+ * 	Each type of disk transport supported MUST have a template defined
+ *	within its .h file.
+ */
+typedef struct se_subsystem_api_s {
+	/*
+	 * The Name. :-)
+	 */
+	char name[16];
+	/*
+	 * Plugin Type.
+	 */
+	u8 type;
+	/*
+	 * Transport Type.
+	 */
+	u8 transport_type;
+	/*
+	 * attach_hba():
+	 */
+	int (*attach_hba)(se_hba_t *, u32);
+	/*
+	 * detach_hba():
+	 */
+	int (*detach_hba)(struct se_hba_s *);
+	/*
+	 * claim_phydevice(): Only for Physical HBAs
+	 */
+	int (*claim_phydevice)(struct se_hba_s *, struct se_device_s *);
+	/*
+	 * allocate_virtdevice():
+	 */
+	void *(*allocate_virtdevice)(struct se_hba_s *, const char *);
+	/*
+	 * create_virtdevice(): Only for Virtual HBAs
+	 */
+	se_device_t *(*create_virtdevice)(struct se_hba_s *,
+				struct se_subsystem_dev_s *, void *);
+	/*
+	 * activate_device():
+	 */
+	int (*activate_device)(struct se_device_s *);
+	/*
+	 * deactivate_device():
+	 */
+	void (*deactivate_device)(struct se_device_s *);
+	/*
+	 * release_phydevice():
+	 */
+	int (*release_phydevice)(struct se_device_s *);
+	/*
+	 * free_device():
+	 */
+	void (*free_device)(void *);
+	/*
+	 * cmd_sequencer():
+	 *
+	 * Use transport_generic_cmd_sequencer() for majority of DAS transport
+	 * drivers with a scsi_transport_spc_t struct as mentioned below.
+	 * Provided out of convenience.
+	 */
+	int (*cmd_sequencer)(se_cmd_t *cmd);
+	/*
+	 * do_tmr():
+	 *
+	 * Use transport_do_tmr() for majority of DAS transport drivers.
+	 * Provided out of convenience.
+	 */
+	int (*do_tmr)(se_cmd_t *cmd);
+	/*
+	 * transport_complete():
+	 *
+	 * Use transport_generic_complete() for majority of DAS transport
+	 * drivers.  Provided out of convenience.
+	 */
+	int (*transport_complete)(se_task_t *task);
+	/*
+	 * allocate_request():
+	 */
+	void *(*allocate_request)(se_task_t *, se_device_t *);
+	/*
+	 * allocate_buf():
+	 */
+	int (*allocate_buf)(se_cmd_t *, u32, u32);
+	/*
+	 * allocate_DMA();
+	 */
+	int (*allocate_DMA)(se_cmd_t *, u32, u32);
+	/*
+	 * free_buf():
+	 */
+	void (*free_buf)(se_cmd_t *);
+	/*
+	 * free_DMA():
+	 */
+	void (*free_DMA)(se_cmd_t *);
+	/*
+	 * do_task():
+	 */
+	int (*do_task)(se_task_t *);
+	/*
+	 * free_task():
+	 */
+	void (*free_task)(se_task_t *);
+	/*
+	 * check_configfs_dev_params():
+	 */
+	ssize_t (*check_configfs_dev_params)(se_hba_t *, se_subsystem_dev_t *);
+	/*
+	 * set_configfs_dev_params():
+	 */
+	ssize_t (*set_configfs_dev_params)(se_hba_t *, se_subsystem_dev_t *,
+						const char *, ssize_t);
+	/*
+	 * show_configfs_dev_params():
+	 */
+	ssize_t (*show_configfs_dev_params)(se_hba_t *, se_subsystem_dev_t *,
+						char *);
+	/*
+	 * create_virtdevice_from-fd():
+	 */
+	se_device_t *(*create_virtdevice_from_fd)(se_subsystem_dev_t *,
+						const char *);
+	/*
+	 * get_plugin_info():
+	 */
+	void (*get_plugin_info)(void *, char *, int *);
+	/*
+	 * get_hba_info():
+	 */
+	void (*get_hba_info)(se_hba_t *, char *, int *);
+	/*
+	 * get_dev_info():
+	 */
+	void (*get_dev_info)(se_device_t *, char *, int *);
+	/*
+	 * check_lba():
+	 */
+	int (*check_lba)(unsigned long long lba, se_device_t *);
+	/*
+	 * check_for_SG():
+	 */
+	int (*check_for_SG)(se_task_t *);
+	/*
+	 * get_cdb():
+	 */
+	unsigned char *(*get_cdb)(se_task_t *);
+	/*
+	 * get_blocksize():
+	 */
+	u32 (*get_blocksize)(se_device_t *);
+	/*
+	 * get_device_rev():
+	 */
+	u32 (*get_device_rev)(se_device_t *);
+	/*
+	 * get_device_type():
+	 */
+	u32 (*get_device_type)(se_device_t *);
+	/*
+	 * get_dma_length():
+	 */
+	u32 (*get_dma_length)(u32, se_device_t *);
+	/*
+	 * get_max_cdbs():
+	 */
+	u32 (*get_max_cdbs)(se_device_t *);
+	/*
+	 * get_max_sectors():
+	 */
+	 u32 (*get_max_sectors)(se_device_t *);
+	/*
+	 * get_queue_depth():
+	 *
+	 */
+	u32 (*get_queue_depth)(se_device_t *);
+	/*
+	 * get_max_queue_depth():
+	 */
+	u32 (*get_max_queue_depth)(se_device_t *);
+	/*
+	 * do_se_mem_map():
+	 */
+	int (*do_se_mem_map)(se_task_t *, struct list_head *, void *,
+				se_mem_t *, se_mem_t **, u32 *, u32 *);
+	/*
+	 * get_sense_buffer():
+	 */
+	unsigned char *(*get_sense_buffer)(se_task_t *);
+	/*
+	 * map_task_to_SG():
+	 */
+	void (*map_task_to_SG)(se_task_t *);
+	/*
+	 * set_iovec_ptrs():
+	 */
+	int (*set_iovec_ptrs)(se_map_sg_t *, se_unmap_sg_t *);
+	/*
+	 * shutdown_hba():
+	 */
+	void (*shutdown_hba)(se_hba_t *);
+	/*
+	 * write_pending():
+	 */
+	int (*write_pending)(se_task_t *);
+	/*
+	 * se_subsystem_spc_t structure:
+	 *
+	 * Contains function pointers of SPC opcodes to call from the generic
+	 * command sequencer into a transport driver if the generic command
+	 * sequencer is used. (ie: cmd_sequencer() is NULL)
+	 */
+	se_subsystem_spc_t *spc;
+} ____cacheline_aligned se_subsystem_api_t;
+
+#define TRANSPORT(dev)		((dev)->transport)
+#define TRANSPORT_SPC(dev)	((dev)->transport->spc)
+#define HBA_TRANSPORT(hba)	((hba)->transport)
+
+#endif /* TARGET_CORE_TRANSPORT_H */
+
diff --git a/include/target/target_core_transport_plugin.h b/include/target/target_core_transport_plugin.h
new file mode 100644
index 0000000..118ee3a
--- /dev/null
+++ b/include/target/target_core_transport_plugin.h
@@ -0,0 +1,60 @@
+/*******************************************************************************
+ * Filename:  target_core_transport_plugin.h
+ *
+ * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc.
+ * Copyright (c) 2005, 2006, 2007 SBE, Inc.
+ * Copyright (c) 2007-2009 Rising Tide Software, Inc.
+ * Copyright (c) 2008-2009 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@xxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+
+#ifndef _TARGET_CORE_TRANSPORT_PLUGIN_H_
+#define _TARGET_CORE_TRANSPORT_PLUGIN_H_
+
+#ifdef PARALLEL_SCSI
+#define PSCSI_INCLUDE_STRUCTS
+#include <target/target_core_pscsi.h>
+#undef PSCSI_INCLUDE_STRUCTS
+extern se_subsystem_api_t pscsi_template;
+#endif /* PARALLEL_SCSI */
+
+#ifdef PYX_IBLOCK
+#define IBLOCK_INCLUDE_STRUCTS
+#include <target/target_core_iblock.h>
+#undef IBLOCK_INCLUDE_STRUCTS
+extern se_subsystem_api_t iblock_template;
+#endif /* PYX_IBLOCK */
+
+#ifdef PYX_RAMDISK
+#define RD_INCLUDE_STRUCTS
+#include <target/target_core_rd.h>
+#undef RD_INCLUDE_STRUCTS
+extern se_subsystem_api_t rd_dr_template;
+extern se_subsystem_api_t rd_mcp_template;
+#endif /* PYX_RAMDISK */
+
+#ifdef PYX_FILEIO
+#define FD_INCLUDE_STRUCTS
+#include <target/target_core_file.h>
+#undef FD_INCLUDE_STRUCTS
+extern se_subsystem_api_t fileio_template;
+#endif /* PYX_FILEIO */
+
+#endif    /*** _TARGET_CORE_TRANSPORT_PLUGIN_H_ ***/


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