[RFC PATCH 3/19] Target_Core_Mod device core infrastructure

[Nicholas A. Bellinger]

The patch adds the core se_device_t functionality that is used internally by
target_core_mod, as well as ConfigFS enabled fabric modules like LIO-Target v3.0
(iscsi_target_mod).

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

diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c
new file mode 100644
index 0000000..979063c
--- /dev/null
+++ b/drivers/target/target_core_device.c
@@ -0,0 +1,1384 @@
+/*******************************************************************************
+ * Filename:  target_core_device.c (based on iscsi_target_device.c)
+ *
+ * This file contains the iSCSI Virtual Device and Disk Transport
+ * agnostic related functions.
+ *
+ * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
+ * Copyright (c) 2005-2006 SBE, Inc.  All Rights Reserved.
+ * 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_DEVICE_C
+
+#include <linux/net.h>
+#include <linux/string.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/smp_lock.h>
+#include <linux/in.h>
+#include <net/sock.h>
+#include <net/tcp.h>
+#include <scsi/scsi.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_device.h>
+#include <target/target_core_hba.h>
+#include <target/target_core_alua.h>
+#include <target/target_core_pr.h>
+#include <target/target_core_tpg.h>
+#include <target/target_core_transport.h>
+#include <target/target_core_ua.h>
+#include <target/target_core_fabric_ops.h>
+#include <target/target_core_plugin.h>
+#include <target/target_core_seobj.h>
+
+#undef TARGET_CORE_DEVICE_C
+
+struct block_device *linux_blockdevice_claim_bd(
+	struct block_device *bd,
+	void *claim_ptr)
+{
+	if (blkdev_get(bd, FMODE_WRITE|FMODE_READ) < 0)
+		return NULL;
+	/*
+	 * If no claim pointer was passed from claimee, use struct block_device.
+	 */
+	if (!claim_ptr)
+		claim_ptr = (void *)bd;
+
+	if (bd_claim(bd, claim_ptr) < 0) {
+		blkdev_put(bd, FMODE_WRITE|FMODE_READ);
+		return NULL;
+	}
+
+	return bd;
+}
+
+struct block_device *__linux_blockdevice_claim(
+	int major,
+	int minor,
+	void *claim_ptr,
+	int *ret)
+{
+	dev_t dev;
+	struct block_device *bd;
+
+	dev = MKDEV(major, minor);
+
+	bd = bdget(dev);
+	if (!(bd)) {
+		*ret = -1;
+		return NULL;
+	}
+
+	if (blkdev_get(bd, FMODE_WRITE|FMODE_READ) < 0) {
+		*ret = -1;
+		return NULL;
+	}
+	/*
+	 * If no claim pointer was passed from claimee, use struct block_device.
+	 */
+	if (!claim_ptr)
+		claim_ptr = (void *)bd;
+
+	if (bd_claim(bd, claim_ptr) < 0) {
+		*ret = 0;
+		return bd;
+	}
+
+	*ret = 1;
+	return bd;
+}
+
+struct block_device *linux_blockdevice_claim(
+	int major,
+	int minor,
+	void *claim_ptr)
+{
+	dev_t dev;
+	struct block_device *bd;
+
+	dev = MKDEV(major, minor);
+
+	bd = bdget(dev);
+	if (!(bd))
+		return NULL;
+
+	if (blkdev_get(bd, FMODE_WRITE|FMODE_READ) < 0)
+		return NULL;
+	/*
+	 * If no claim pointer was passed from claimee, use struct block_device.
+	 */
+	if (!claim_ptr)
+		claim_ptr = (void *)bd;
+
+	if (bd_claim(bd, claim_ptr) < 0) {
+		blkdev_put(bd, FMODE_WRITE|FMODE_READ);
+		return NULL;
+	}
+
+	return bd;
+}
+
+int linux_blockdevice_release(int major, int minor, struct block_device *bd_p)
+{
+	dev_t dev;
+	struct block_device *bd;
+
+	if (!bd_p) {
+		dev = MKDEV(major, minor);
+
+		bd = bdget(dev);
+		if (!(bd))
+			return -1;
+	} else
+		bd = bd_p;
+
+	bd_release(bd);
+	blkdev_put(bd, FMODE_WRITE|FMODE_READ);
+
+	return 0;
+}
+
+int linux_blockdevice_check(int major, int minor)
+{
+	struct block_device *bd;
+
+	bd = linux_blockdevice_claim(major, minor, NULL);
+	if (!(bd))
+		return -1;
+	/*
+	 * Blockdevice was able to be claimed, now unclaim it and return success
+	 */
+	linux_blockdevice_release(major, minor, NULL);
+
+	return 0;
+}
+EXPORT_SYMBOL(linux_blockdevice_check);
+
+int se_check_devices_access(se_hba_t *hba)
+{
+	se_device_t *dev;
+	int ret = 0;
+
+	spin_lock(&hba->device_lock);
+	list_for_each_entry(dev, &hba->hba_dev_list, dev_list) {
+		if (DEV_OBJ_API(dev)->check_count(&dev->dev_feature_obj) != 0) {
+			printk(KERN_ERR "check_count(&dev->dev_feature_obj):"
+				" %u\n", DEV_OBJ_API(dev)->check_count(
+					&dev->dev_feature_obj));
+			ret = -1;
+		}
+	}
+	spin_unlock(&hba->device_lock);
+
+	return ret;
+}
+
+/*	se_disable_devices_for_hba():
+ *
+ *
+ */
+void se_disable_devices_for_hba(se_hba_t *hba)
+{
+	se_device_t *dev;
+
+	spin_lock(&hba->device_lock);
+	list_for_each_entry(dev, &hba->hba_dev_list, dev_list) {
+
+		spin_lock(&dev->dev_status_lock);
+		if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
+		    (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) ||
+		    (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) ||
+		    (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED)) {
+			dev->dev_status |= TRANSPORT_DEVICE_SHUTDOWN;
+			dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED;
+			dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED;
+			dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
+			dev->dev_status &=
+					~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
+
+			wake_up_interruptible(&dev->dev_queue_obj->thread_wq);
+		}
+		spin_unlock(&dev->dev_status_lock);
+	}
+	spin_unlock(&hba->device_lock);
+
+	return;
+}
+
+extern int __transport_get_lun_for_cmd(
+	se_cmd_t *se_cmd,
+	u32 unpacked_lun)
+{
+	se_dev_entry_t *deve;
+	se_lun_t *se_lun = NULL;
+	se_session_t *se_sess = SE_SESS(se_cmd);
+	unsigned long flags;
+	int read_only = 0;
+
+	spin_lock_bh(&SE_NODE_ACL(se_sess)->device_list_lock);
+	deve = se_cmd->se_deve =
+			&SE_NODE_ACL(se_sess)->device_list[unpacked_lun];
+	if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
+		if (se_cmd) {
+			deve->total_cmds++;
+			deve->total_bytes += se_cmd->data_length;
+
+			if (se_cmd->data_direction == SE_DIRECTION_WRITE) {
+				if (deve->lun_flags &
+						TRANSPORT_LUNFLAGS_READ_ONLY) {
+					read_only = 1;
+					goto out;
+				}
+#ifdef SNMP_SUPPORT
+				deve->write_bytes += se_cmd->data_length;
+#endif /* SNMP_SUPPORT */
+			} else if (se_cmd->data_direction ==
+				   SE_DIRECTION_READ) {
+#ifdef SNMP_SUPPORT
+				deve->read_bytes += se_cmd->data_length;
+#endif /* SNMP_SUPPORT */
+			}
+		}
+		deve->deve_cmds++;
+
+		se_lun = se_cmd->se_lun = deve->se_lun;
+		se_cmd->pr_res_key = deve->pr_res_key;
+		se_cmd->orig_fe_lun = unpacked_lun;
+		se_cmd->se_orig_obj_api = SE_LUN(se_cmd)->lun_obj_api;
+		se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_type_ptr;
+		se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
+	}
+out:
+	spin_unlock_bh(&SE_NODE_ACL(se_sess)->device_list_lock);
+
+	if (!se_lun) {
+		if (read_only) {
+			se_cmd->scsi_sense_reason = WRITE_PROTECTED;
+			printk("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
+				" Access for 0x%08x\n",
+				CMD_TFO(se_cmd)->get_fabric_name(),
+				unpacked_lun);
+		} else {
+			se_cmd->scsi_sense_reason = NON_EXISTENT_LUN;
+			printk("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
+				" Access for 0x%08x\n",
+				CMD_TFO(se_cmd)->get_fabric_name(),
+				unpacked_lun);
+		}
+		se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+		return -1;
+	}
+	/*
+	 * Determine if the se_lun_t is online.
+	 */
+/* #warning FIXME: Check for LUN_RESET + UNIT Attention */
+	if (LUN_OBJ_API(se_lun)->check_online(se_lun->lun_type_ptr) != 0) {
+		se_cmd->scsi_sense_reason = NON_EXISTENT_LUN;
+		se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+		return -1;
+	}
+
+#ifdef SNMP_SUPPORT
+	{
+	se_device_t *dev = se_lun->se_dev;
+	spin_lock(&dev->stats_lock);
+	dev->num_cmds++;
+	if (se_cmd->data_direction == SE_DIRECTION_WRITE)
+		dev->write_bytes += se_cmd->data_length;
+	else if (se_cmd->data_direction == SE_DIRECTION_READ)
+		dev->read_bytes += se_cmd->data_length;
+	spin_unlock(&dev->stats_lock);
+	}
+#endif /* SNMP_SUPPORT */
+
+	/*
+	 * Add the iscsi_cmd_t to the se_lun_t's cmd list.  This list is used
+	 * for tracking state of se_cmd_ts during LUN shutdown events.
+	 */
+	spin_lock_irqsave(&se_lun->lun_cmd_lock, flags);
+	list_add_tail(&se_cmd->se_lun_list, &se_lun->lun_cmd_list);
+	atomic_set(&T_TASK(se_cmd)->transport_lun_active, 1);
+#if 0
+	printk(KERN_INFO "Adding ITT: 0x%08x to LUN LIST[%d]\n",
+		CMD_TFO(se_cmd)->get_task_tag(se_cmd), se_lun->unpacked_lun);
+#endif
+	spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags);
+
+	return 0;
+}
+
+extern int transport_get_lun_for_tmr(
+	se_cmd_t *se_cmd,
+	u32 unpacked_lun)
+{
+	se_device_t *dev = NULL;
+	se_dev_entry_t *deve;
+	se_lun_t *se_lun = NULL;
+	se_session_t *se_sess = SE_SESS(se_cmd);
+	se_tmr_req_t *se_tmr = se_cmd->se_tmr_req;
+
+	spin_lock_bh(&SE_NODE_ACL(se_sess)->device_list_lock);
+	deve = se_cmd->se_deve =
+			&SE_NODE_ACL(se_sess)->device_list[unpacked_lun];
+	if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
+		se_lun = se_cmd->se_lun = se_tmr->tmr_lun = deve->se_lun;
+		dev = se_tmr->tmr_dev = se_lun->se_dev;
+		se_cmd->pr_res_key = deve->pr_res_key;
+		se_cmd->orig_fe_lun = unpacked_lun;
+		se_cmd->se_orig_obj_api = SE_LUN(se_cmd)->lun_obj_api;
+		se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_type_ptr;
+/*		se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; */
+	}
+	spin_unlock_bh(&SE_NODE_ACL(se_sess)->device_list_lock);
+
+	if (!se_lun) {
+		printk(KERN_INFO "TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
+			" Access for 0x%08x\n",
+			CMD_TFO(se_cmd)->get_fabric_name(),
+			unpacked_lun);
+		se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+		return -1;
+	}
+	/*
+	 * Determine if the se_lun_t is online.
+	 */
+/* #warning FIXME: Check for LUN_RESET + UNIT Attention */
+	if (LUN_OBJ_API(se_lun)->check_online(se_lun->lun_type_ptr) != 0) {
+		se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+		return -1;
+	}
+
+	spin_lock(&dev->se_tmr_lock);
+	list_add_tail(&se_tmr->tmr_list, &dev->dev_tmr_list);
+	spin_unlock(&dev->se_tmr_lock);
+
+	return 0;
+}
+EXPORT_SYMBOL(transport_get_lun_for_tmr);
+
+int core_free_device_list_for_node(
+	se_node_acl_t *nacl,
+	se_portal_group_t *tpg)
+{
+	se_dev_entry_t *deve;
+	se_lun_t *lun;
+	u32 i;
+
+	if (!nacl->device_list)
+		return 0;
+
+	spin_lock_bh(&nacl->device_list_lock);
+	for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
+		deve = &nacl->device_list[i];
+
+		if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
+			continue;
+
+		if (!deve->se_lun) {
+			printk(KERN_ERR "%s device entries device pointer is"
+				" NULL, but Initiator has access.\n",
+				TPG_TFO(tpg)->get_fabric_name());
+			continue;
+		}
+		lun = deve->se_lun;
+
+		spin_unlock_bh(&nacl->device_list_lock);
+		core_update_device_list_for_node(lun, deve->mapped_lun,
+			TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
+		spin_lock_bh(&nacl->device_list_lock);
+	}
+	spin_unlock_bh(&nacl->device_list_lock);
+
+	kfree(nacl->device_list);
+	nacl->device_list = NULL;
+
+	return 0;
+}
+
+void core_dec_lacl_count(se_node_acl_t *se_nacl, se_cmd_t *se_cmd)
+{
+	se_dev_entry_t *deve;
+
+	spin_lock_bh(&se_nacl->device_list_lock);
+	deve = &se_nacl->device_list[se_cmd->orig_fe_lun];
+	deve->deve_cmds--;
+	spin_unlock_bh(&se_nacl->device_list_lock);
+
+	return;
+}
+
+void core_update_device_list_access(
+	u32 mapped_lun,
+	u32 lun_access,
+	se_node_acl_t *nacl)
+{
+	se_dev_entry_t *deve;
+
+	spin_lock_bh(&nacl->device_list_lock);
+	deve = &nacl->device_list[mapped_lun];
+	if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
+		deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
+		deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
+	} else {
+		deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
+		deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
+	}
+	spin_unlock_bh(&nacl->device_list_lock);
+
+	return;
+}
+EXPORT_SYMBOL(core_update_device_list_access);
+
+/*      core_update_device_list_for_node():
+ *
+ *
+ */
+void core_update_device_list_for_node(
+	se_lun_t *lun,
+	u32 mapped_lun,
+	u32 lun_access,
+	se_node_acl_t *nacl,
+	se_portal_group_t *tpg,
+	int enable)
+{
+	se_dev_entry_t *deve;
+
+	spin_lock_bh(&nacl->device_list_lock);
+	deve = &nacl->device_list[mapped_lun];
+	if (enable) {
+		deve->se_lun = lun;
+		deve->mapped_lun = mapped_lun;
+		deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
+
+		if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
+			deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
+			deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
+		} else {
+			deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
+			deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
+		}
+#ifdef SNMP_SUPPORT
+		deve->creation_time = get_jiffies_64();
+		deve->attach_count++;
+#endif /* SNMP_SUPPORT */
+		spin_unlock_bh(&nacl->device_list_lock);
+		return;
+	}
+	/*
+	 * Disable se_dev_entry_t LUN ACL mapping
+	 */
+	core_scsi3_ua_release_all(deve);
+	deve->se_lun = NULL;
+	deve->lun_flags = 0;
+	deve->creation_time = 0;
+	spin_unlock_bh(&nacl->device_list_lock);
+
+	core_scsi3_free_pr_reg_from_nacl(lun->se_dev, nacl);
+	return;
+}
+
+/*      core_clear_lun_from_tpg():
+ *
+ *
+ */
+void core_clear_lun_from_tpg(se_lun_t *lun, se_portal_group_t *tpg)
+{
+	se_node_acl_t *nacl;
+	se_dev_entry_t *deve;
+	u32 i;
+
+	spin_lock_bh(&tpg->acl_node_lock);
+	list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
+		spin_unlock_bh(&tpg->acl_node_lock);
+
+		spin_lock_bh(&nacl->device_list_lock);
+		for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
+			deve = &nacl->device_list[i];
+			if (lun != deve->se_lun)
+				continue;
+			spin_unlock_bh(&nacl->device_list_lock);
+
+			core_update_device_list_for_node(lun, deve->mapped_lun,
+				TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
+
+			spin_lock_bh(&nacl->device_list_lock);
+		}
+		spin_unlock_bh(&nacl->device_list_lock);
+
+		spin_lock_bh(&tpg->acl_node_lock);
+	}
+	spin_unlock_bh(&tpg->acl_node_lock);
+
+	return;
+}
+
+se_port_t *core_alloc_port(se_device_t *dev)
+{
+	se_port_t *port, *port_tmp;
+
+	port = kzalloc(sizeof(se_port_t), GFP_KERNEL);
+	if (!(port)) {
+		printk(KERN_ERR "Unable to allocate se_port_t\n");
+		return NULL;
+	}
+	INIT_LIST_HEAD(&port->sep_list);
+
+	spin_lock(&dev->se_port_lock);
+	if (dev->dev_port_count == 0x0000ffff) {
+		printk(KERN_WARNING "Reached dev->dev_port_count =="
+				" 0x0000ffff\n");
+		spin_unlock(&dev->se_port_lock);
+		return NULL;
+	}
+again:
+	/*
+	 * Allocate the next RELATIVE TARGET PORT IDENTIFER for this se_device_t
+	 * Here is the table from spc4r17 section 7.7.3.8.
+	 *
+	 *    Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
+	 *
+	 * Code      Description
+	 * 0h        Reserved
+	 * 1h        Relative port 1, historically known as port A
+	 * 2h        Relative port 2, historically known as port B
+	 * 3h to FFFFh    Relative port 3 through 65 535
+	 */
+	port->sep_rtpi = dev->dev_rpti_counter++;
+	if (!(port->sep_rtpi))
+		goto again;
+
+	list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
+		/*
+		 * Make sure RELATIVE TARGET PORT IDENTIFER is unique
+		 * for 16-bit wrap..
+		 */
+		if (port->sep_rtpi == port_tmp->sep_rtpi)
+			goto again;
+	}
+	spin_unlock(&dev->se_port_lock);
+
+	return port;
+}
+
+void core_export_port(
+	se_device_t *dev,
+	se_portal_group_t *tpg,
+	se_port_t *port,
+	se_lun_t *lun)
+{
+	se_subsystem_dev_t *su_dev = SU_DEV(dev);
+	t10_alua_tg_pt_gp_member_t *tg_pt_gp_mem = NULL;
+
+	spin_lock(&dev->se_port_lock);
+	spin_lock(&lun->lun_sep_lock);
+	port->sep_tpg = tpg;
+	port->sep_lun = lun;
+	lun->lun_sep = port;
+	spin_unlock(&lun->lun_sep_lock);
+
+	list_add_tail(&port->sep_list, &dev->dev_sep_list);
+	spin_unlock(&dev->se_port_lock);
+
+	if (T10_ALUA(su_dev)->alua_type == SPC3_ALUA_EMULATED) {
+		tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
+		if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
+			printk(KERN_ERR "Unable to allocate t10_alua_tg_pt"
+					"_gp_member_t\n");
+			return;
+		}
+		spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+		__core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
+			se_global->default_tg_pt_gp);
+		spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+
+		printk(KERN_INFO "%s/%s: Adding to default ALUA Target Port"
+			" Group: core/alua/tg_pt_gps/default_tg_pt_gp\n",
+			TRANSPORT(dev)->name, TPG_TFO(tpg)->get_fabric_name());
+	}
+
+	dev->dev_port_count++;
+#ifdef SNMP_SUPPORT
+	port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */
+#endif
+	return;
+}
+
+/*
+ *	Called with se_device_t->se_port_lock spinlock held.
+ */
+void core_release_port(se_device_t *dev, se_port_t *port)
+{
+	core_alua_free_tg_pt_gp_mem(port);
+
+	list_del(&port->sep_list);
+	dev->dev_port_count--;
+	kfree(port);
+
+	return;
+}
+
+int transport_core_report_lun_response(se_cmd_t *se_cmd)
+{
+	se_dev_entry_t *deve;
+	se_lun_t *se_lun;
+	se_session_t *se_sess = SE_SESS(se_cmd);
+	se_task_t *se_task;
+	unsigned char *buf = (unsigned char *)T_TASK(se_cmd)->t_task_buf;
+	u32 cdb_offset = 0, lun_count = 0, offset = 8;
+	u64 i, lun;
+
+	list_for_each_entry(se_task, &T_TASK(se_cmd)->t_task_list, t_list)
+		break;
+
+	if (!(se_task)) {
+		printk(KERN_ERR "Unable to locate se_task_t for se_cmd_t\n");
+		return PYX_TRANSPORT_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+	}
+
+	/*
+	 * If no se_session_t pointer is present, this se_cmd_t is
+	 * coming via a target_core_mod PASSTHROUGH op, and not through
+	 * a $FABRIC_MOD.  In that case, report LUN=0 only.
+	 */
+	if (!(se_sess)) {
+		lun = 0;
+		buf[offset++] = ((lun >> 56) & 0xff);
+		buf[offset++] = ((lun >> 48) & 0xff);
+		buf[offset++] = ((lun >> 40) & 0xff);
+		buf[offset++] = ((lun >> 32) & 0xff);
+		buf[offset++] = ((lun >> 24) & 0xff);
+		buf[offset++] = ((lun >> 16) & 0xff);
+		buf[offset++] = ((lun >> 8) & 0xff);
+		buf[offset++] = (lun & 0xff);
+		lun_count = 1;
+		goto done;
+	}
+
+	spin_lock_bh(&SE_NODE_ACL(se_sess)->device_list_lock);
+	for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
+		deve = &SE_NODE_ACL(se_sess)->device_list[i];
+		if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
+			continue;
+		se_lun = deve->se_lun;
+		/*
+		 * We determine the correct LUN LIST LENGTH even once we
+		 * have reached the initial allocation length.
+		 * See SPC2-R20 7.19.
+		 */
+		lun_count++;
+		if ((cdb_offset + 8) >= se_cmd->data_length)
+			continue;
+
+		lun = cpu_to_be64(CMD_TFO(se_cmd)->pack_lun(deve->mapped_lun));
+		buf[offset++] = ((lun >> 56) & 0xff);
+		buf[offset++] = ((lun >> 48) & 0xff);
+		buf[offset++] = ((lun >> 40) & 0xff);
+		buf[offset++] = ((lun >> 32) & 0xff);
+		buf[offset++] = ((lun >> 24) & 0xff);
+		buf[offset++] = ((lun >> 16) & 0xff);
+		buf[offset++] = ((lun >> 8) & 0xff);
+		buf[offset++] = (lun & 0xff);
+		cdb_offset += 8;
+	}
+	spin_unlock_bh(&SE_NODE_ACL(se_sess)->device_list_lock);
+
+	/*
+	 * See SPC3 r07, page 159.
+	 */
+done:
+	lun_count *= 8;
+	buf[0] = ((lun_count >> 24) & 0xff);
+	buf[1] = ((lun_count >> 16) & 0xff);
+	buf[2] = ((lun_count >> 8) & 0xff);
+	buf[3] = (lun_count & 0xff);
+
+	return PYX_TRANSPORT_SENT_TO_TRANSPORT;
+}
+
+/*	se_release_device_for_hba():
+ *
+ *
+ */
+void se_release_device_for_hba(se_device_t *dev)
+{
+	se_hba_t *hba = dev->se_hba;
+
+	if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
+	    (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) ||
+	    (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) ||
+	    (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) ||
+	    (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED))
+		se_dev_stop(dev);
+
+	transport_generic_free_device(dev);
+
+	spin_lock(&hba->device_lock);
+	list_del(&dev->dev_list);
+	hba->dev_count--;
+	spin_unlock(&hba->device_lock);
+
+	core_scsi3_free_all_registrations(dev);
+	se_release_vpd_for_dev(dev);
+
+	kfree(dev->dev_status_queue_obj);
+	kfree(dev->dev_queue_obj);
+	kfree(dev);
+
+	return;
+}
+
+void se_release_vpd_for_dev(se_device_t *dev)
+{
+	t10_vpd_t *vpd, *vpd_tmp;
+
+	spin_lock(&DEV_T10_WWN(dev)->t10_vpd_lock);
+	list_for_each_entry_safe(vpd, vpd_tmp,
+			&DEV_T10_WWN(dev)->t10_vpd_list, vpd_list) {
+		list_del(&vpd->vpd_list);
+		kfree(vpd);
+	}
+	spin_unlock(&DEV_T10_WWN(dev)->t10_vpd_lock);
+
+	return;
+}
+
+int transport_get_lun_for_cmd(
+	se_cmd_t *se_cmd,
+	unsigned char *cdb,
+	u32 unpacked_lun)
+{
+	return __transport_get_lun_for_cmd(se_cmd, unpacked_lun);
+}
+EXPORT_SYMBOL(transport_get_lun_for_cmd);
+
+/*
+ * Called with se_hba_t->device_lock held.
+ */
+void se_clear_dev_ports(se_device_t *dev)
+{
+	se_hba_t *hba = dev->se_hba;
+	se_lun_t *lun;
+	se_portal_group_t *tpg;
+	se_port_t *sep, *sep_tmp;
+
+	spin_lock(&dev->se_port_lock);
+	list_for_each_entry_safe(sep, sep_tmp, &dev->dev_sep_list, sep_list) {
+		spin_unlock(&dev->se_port_lock);
+		spin_unlock(&hba->device_lock);
+
+		lun = sep->sep_lun;
+		tpg = sep->sep_tpg;
+		spin_lock(&lun->lun_sep_lock);
+		if (lun->lun_type_ptr == NULL) {
+			spin_unlock(&lun->lun_sep_lock);
+			continue;
+		}
+		spin_unlock(&lun->lun_sep_lock);
+
+		LUN_OBJ_API(lun)->del_obj_from_lun(tpg, lun);
+
+		spin_lock(&hba->device_lock);
+		spin_lock(&dev->se_port_lock);
+	}
+	spin_unlock(&dev->se_port_lock);
+
+	return;
+}
+
+/*	se_free_virtual_device():
+ *
+ *	Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers.
+ */
+int se_free_virtual_device(se_device_t *dev, se_hba_t *hba)
+{
+	spin_lock(&hba->device_lock);
+	se_clear_dev_ports(dev);
+	spin_unlock(&hba->device_lock);
+
+	core_alua_free_lu_gp_mem(dev);
+	se_release_device_for_hba(dev);
+
+	return 0;
+}
+EXPORT_SYMBOL(se_free_virtual_device);
+
+void se_dev_start(se_device_t *dev)
+{
+	se_hba_t *hba = dev->se_hba;
+
+	spin_lock(&hba->device_lock);
+	DEV_OBJ_API(dev)->inc_count(&dev->dev_obj);
+	if (DEV_OBJ_API(dev)->check_count(&dev->dev_obj) == 1) {
+		if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) {
+			dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED;
+			dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED;
+		} else if (dev->dev_status &
+			   TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) {
+			dev->dev_status &=
+				~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
+			dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
+		}
+	}
+	spin_unlock(&hba->device_lock);
+}
+
+void se_dev_stop(se_device_t *dev)
+{
+	se_hba_t *hba = dev->se_hba;
+
+	spin_lock(&hba->device_lock);
+	DEV_OBJ_API(dev)->dec_count(&dev->dev_obj);
+	if (DEV_OBJ_API(dev)->check_count(&dev->dev_obj) == 0) {
+		if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) {
+			dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED;
+			dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED;
+		} else if (dev->dev_status &
+			   TRANSPORT_DEVICE_OFFLINE_ACTIVATED) {
+			dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
+			dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
+		}
+	}
+	spin_unlock(&hba->device_lock);
+
+	while (atomic_read(&hba->dev_mib_access_count))
+		msleep(10);
+}
+
+void se_dev_set_default_attribs(se_device_t *dev)
+{
+	DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
+	DEV_ATTRIB(dev)->emulate_tas = DA_EMULATE_TAS;
+	DEV_ATTRIB(dev)->emulate_reservations = DA_EMULATE_RESERVATIONS;
+	DEV_ATTRIB(dev)->emulate_alua = DA_EMULATE_ALUA;
+	/*
+	 * block_size is based on subsystem plugin dependent requirements.
+	 */
+	DEV_ATTRIB(dev)->hw_block_size = TRANSPORT(dev)->get_blocksize(dev);
+	DEV_ATTRIB(dev)->block_size = TRANSPORT(dev)->get_blocksize(dev);
+	/*
+	 * max_sectors is based on subsystem plugin dependent requirements.
+	 */
+	DEV_ATTRIB(dev)->hw_max_sectors = TRANSPORT(dev)->get_max_sectors(dev);
+	DEV_ATTRIB(dev)->max_sectors = TRANSPORT(dev)->get_max_sectors(dev);
+	/*
+	 * queue_depth is based on subsystem plugin dependent requirements.
+	 */
+	DEV_ATTRIB(dev)->hw_queue_depth = TRANSPORT(dev)->get_queue_depth(dev);
+	DEV_ATTRIB(dev)->queue_depth = TRANSPORT(dev)->get_queue_depth(dev);
+	/*
+	 * task_timeout is based on device type.
+	 */
+#if 1
+	/*
+	 * Disabled by default due to known BUG in some cases when task_timeout
+	 * fires..  task_timeout, status_thread and status_thread_tur may end
+	 * up being removed in v3.0.
+	 */
+	DEV_ATTRIB(dev)->task_timeout = 0;
+#else
+	DEV_ATTRIB(dev)->task_timeout = transport_get_default_task_timeout(dev);
+#endif
+}
+
+int se_dev_set_task_timeout(se_device_t *dev, u32 task_timeout)
+{
+	if (task_timeout > DA_TASK_TIMEOUT_MAX) {
+		printk(KERN_ERR "dev[%p]: Passed task_timeout: %u larger then"
+			" DA_TASK_TIMEOUT_MAX\n", dev, task_timeout);
+		return -1;
+	} else {
+		DEV_ATTRIB(dev)->task_timeout = task_timeout;
+		printk(KERN_INFO "dev[%p]: Set SE Device task_timeout: %u\n",
+			dev, task_timeout);
+	}
+
+	return 0;
+}
+
+int se_dev_set_emulate_ua_intlck_ctrl(se_device_t *dev, int flag)
+{
+	if ((flag != 0) && (flag != 1) && (flag != 2)) {
+		printk(KERN_ERR "Illegal value %d\n", flag);
+		return -1;
+	}
+
+	if (DEV_OBJ_API(dev)->check_count(&dev->dev_export_obj)) {
+		printk(KERN_ERR "dev[%p]: Unable to change SE Device"
+			" UA_INTRLCK_CTRL while dev_export_obj: %d count"
+			" exists\n", dev,
+			DEV_OBJ_API(dev)->check_count(&dev->dev_export_obj));
+		return -1;
+	}
+	DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = flag;
+	printk(KERN_INFO "dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
+		dev, DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl);
+
+	return 0;
+}
+
+int se_dev_set_emulate_tas(se_device_t *dev, int flag)
+{
+	if ((flag != 0) && (flag != 1)) {
+		printk(KERN_ERR "Illegal value %d\n", flag);
+		return -1;
+	}
+
+	if (DEV_OBJ_API(dev)->check_count(&dev->dev_export_obj)) {
+		printk(KERN_ERR "dev[%p]: Unable to change SE Device TAS while"
+			" dev_export_obj: %d count exists\n", dev,
+			DEV_OBJ_API(dev)->check_count(&dev->dev_export_obj));
+		return -1;
+	}
+	DEV_ATTRIB(dev)->emulate_tas = flag;
+	printk(KERN_INFO "dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
+		dev, (DEV_ATTRIB(dev)->emulate_tas) ? "Enabled" : "Disabled");
+
+	return 0;
+}
+
+/*
+ * Note, this can only be called on unexported SE Device Object.
+ */
+int se_dev_set_queue_depth(se_device_t *dev, u32 queue_depth)
+{
+	u32 orig_queue_depth = dev->queue_depth;
+
+	if (DEV_OBJ_API(dev)->check_count(&dev->dev_export_obj)) {
+		printk(KERN_ERR "dev[%p]: Unable to change SE Device TCQ while"
+			" dev_export_obj: %d count exists\n", dev,
+			DEV_OBJ_API(dev)->check_count(&dev->dev_export_obj));
+		return -1;
+	}
+	if (!(queue_depth)) {
+		printk(KERN_ERR "dev[%p]: Illegal ZERO value for queue"
+			"_depth\n", dev);
+		return -1;
+	}
+
+	if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
+		if (queue_depth > TRANSPORT(dev)->get_queue_depth(dev)) {
+			printk(KERN_ERR "dev[%p]: Passed queue_depth: %u"
+				" exceeds LIO-Core/SE_Device TCQ: %u\n",
+				dev, queue_depth,
+				TRANSPORT(dev)->get_queue_depth(dev));
+			return -1;
+		}
+	} else {
+		if (queue_depth > TRANSPORT(dev)->get_queue_depth(dev)) {
+			if (!(TRANSPORT(dev)->get_max_queue_depth)) {
+				printk(KERN_ERR "dev[%p]: Unable to locate "
+					"get_max_queue_depth() function"
+					" pointer\n", dev);
+				return -1;
+			}
+			if (queue_depth > TRANSPORT(dev)->get_max_queue_depth(
+					dev)) {
+				printk(KERN_ERR "dev[%p]: Passed queue_depth:"
+					" %u exceeds LIO-Core/SE_Device MAX"
+					" TCQ: %u\n", dev, queue_depth,
+					TRANSPORT(dev)->get_max_queue_depth(
+						dev));
+				return -1;
+			}
+		}
+	}
+
+	DEV_ATTRIB(dev)->queue_depth = dev->queue_depth = queue_depth;
+	if (queue_depth > orig_queue_depth)
+		atomic_add(queue_depth - orig_queue_depth, &dev->depth_left);
+	else if (queue_depth < orig_queue_depth)
+		atomic_sub(orig_queue_depth - queue_depth, &dev->depth_left);
+
+	printk(KERN_INFO "dev[%p]: SE Device TCQ Depth changed to: %u\n",
+			dev, queue_depth);
+	return 0;
+}
+
+/* #warning FIXME: Forcing max_sectors greater than get_max_sectors() disabled */
+int se_dev_set_max_sectors(se_device_t *dev, u32 max_sectors)
+{
+	int force = 0; /* Force setting for VDEVS */
+
+	if (DEV_OBJ_API(dev)->check_count(&dev->dev_export_obj)) {
+		printk(KERN_ERR "dev[%p]: Unable to change SE Device"
+			" max_sectors while dev_export_obj: %d count exists\n",
+			dev, DEV_OBJ_API(dev)->check_count(
+				&dev->dev_export_obj));
+		return -1;
+	}
+	if (!(max_sectors)) {
+		printk(KERN_ERR "dev[%p]: Illegal ZERO value for"
+			" max_sectors\n", dev);
+		return -1;
+	}
+	if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
+		printk(KERN_ERR "dev[%p]: Passed max_sectors: %u less than"
+			" DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors,
+				DA_STATUS_MAX_SECTORS_MIN);
+		return -1;
+	}
+	if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
+		if (max_sectors > TRANSPORT(dev)->get_max_sectors(dev)) {
+			 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
+				" greater than LIO-Core/SE_Device max_sectors:"
+				" %u\n", dev, max_sectors,
+				TRANSPORT(dev)->get_max_sectors(dev));
+			 return -1;
+		}
+	} else {
+		if (!(force) && (max_sectors >
+				 TRANSPORT(dev)->get_max_sectors(dev))) {
+			printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
+				" greater than LIO-Core/SE_Device max_sectors"
+				": %u, use force=1 to override.\n", dev,
+				max_sectors,
+				TRANSPORT(dev)->get_max_sectors(dev));
+			return -1;
+		}
+		if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
+			printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
+				" greater than DA_STATUS_MAX_SECTORS_MAX:"
+				" %u\n", dev, max_sectors,
+				DA_STATUS_MAX_SECTORS_MAX);
+			return -1;
+		}
+	}
+
+	DEV_ATTRIB(dev)->max_sectors = max_sectors;
+	printk("dev[%p]: SE Device max_sectors changed to %u\n",
+			dev, max_sectors);
+	return 0;
+}
+
+int se_dev_set_block_size(se_device_t *dev, u32 block_size)
+{
+	if (DEV_OBJ_API(dev)->check_count(&dev->dev_export_obj)) {
+		printk(KERN_ERR "dev[%p]: Unable to change SE Device block_size"
+			" while dev_export_obj: %d count exists\n", dev,
+			DEV_OBJ_API(dev)->check_count(&dev->dev_export_obj));
+		return -1;
+	}
+
+	if ((block_size != 512) &&
+	    (block_size != 1024) &&
+	    (block_size != 2048) &&
+	    (block_size != 4096)) {
+		printk(KERN_ERR "dev[%p]: Illegal value for block_device: %u"
+			" for SE device, must be 512, 1024, 2048 or 4096\n",
+			dev, block_size);
+		return -1;
+	}
+
+	if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
+		printk(KERN_ERR "dev[%p]: Not allowed to change block_size for"
+			" Physical Device, use for Linux/SCSI to change"
+			" block_size for underlying hardware\n", dev);
+		return -1;
+	}
+
+	DEV_ATTRIB(dev)->block_size = block_size;
+	printk(KERN_INFO "dev[%p]: SE Device block_size changed to %u\n",
+			dev, block_size);
+	return 0;
+}
+
+se_lun_t *core_dev_add_lun(
+	se_portal_group_t *tpg,
+	se_hba_t *hba,
+	se_device_t *dev,
+	u32 lun)
+{
+	se_lun_t *lun_p;
+	u32 lun_access = 0;
+
+	if (DEV_OBJ_API(dev)->check_count(&dev->dev_access_obj) != 0) {
+		printk(KERN_ERR "Unable to export se_device_t while dev_access_obj: %d\n",
+			DEV_OBJ_API(dev)->check_count(&dev->dev_access_obj));
+		return NULL;
+	}
+
+	lun_p = core_tpg_pre_addlun(tpg, lun);
+	if ((IS_ERR(lun_p)) || !(lun_p))
+		return NULL;
+
+	if (DEV_OBJ_API(dev)->get_device_access((void *)dev) == 0)
+		lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
+	else
+		lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
+
+	if (core_tpg_post_addlun(tpg, lun_p, TRANSPORT_LUN_TYPE_DEVICE,
+			lun_access, dev, dev->dev_obj_api) < 0) {
+		return NULL;
+	}
+
+	printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
+		" CORE HBA: %u\n", TPG_TFO(tpg)->get_fabric_name(),
+		TPG_TFO(tpg)->tpg_get_tag(tpg), lun_p->unpacked_lun,
+		TPG_TFO(tpg)->get_fabric_name(), hba->hba_id);
+	/*
+	 * Update LUN maps for dynamically added initiators when
+	 * generate_node_acl is enabled.
+	 */
+	if (TPG_TFO(tpg)->tpg_check_demo_mode(tpg)) {
+		se_node_acl_t *acl;
+		spin_lock_bh(&tpg->acl_node_lock);
+		list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
+			if (acl->nodeacl_flags & NAF_DYNAMIC_NODE_ACL) {
+				spin_unlock_bh(&tpg->acl_node_lock);
+				core_tpg_add_node_to_devs(acl, tpg);
+				spin_lock_bh(&tpg->acl_node_lock);
+			}
+		}
+		spin_unlock_bh(&tpg->acl_node_lock);
+	}
+
+	return lun_p;
+}
+EXPORT_SYMBOL(core_dev_add_lun);
+
+/*      core_dev_del_lun():
+ *
+ *
+ */
+int core_dev_del_lun(
+	se_portal_group_t *tpg,
+	u32 unpacked_lun)
+{
+	se_lun_t *lun;
+	int ret = 0;
+
+	lun = core_tpg_pre_dellun(tpg, unpacked_lun, TRANSPORT_LUN_TYPE_DEVICE,
+			&ret);
+	if (!(lun))
+		return ret;
+
+	core_tpg_post_dellun(tpg, lun);
+
+	printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
+		" device object\n", TPG_TFO(tpg)->get_fabric_name(),
+		TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun,
+		TPG_TFO(tpg)->get_fabric_name());
+
+	return 0;
+}
+EXPORT_SYMBOL(core_dev_del_lun);
+
+se_lun_t *core_get_lun_from_tpg(se_portal_group_t *tpg, u32 unpacked_lun)
+{
+	se_lun_t *lun;
+
+	spin_lock(&tpg->tpg_lun_lock);
+	if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
+		printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
+			"_PER_TPG-1: %u for Target Portal Group: %hu\n",
+			TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
+			TRANSPORT_MAX_LUNS_PER_TPG-1,
+			TPG_TFO(tpg)->tpg_get_tag(tpg));
+		spin_unlock(&tpg->tpg_lun_lock);
+		return NULL;
+	}
+	lun = &tpg->tpg_lun_list[unpacked_lun];
+
+	if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
+		printk(KERN_ERR "%s Logical Unit Number: %u is not free on"
+			" Target Portal Group: %hu, ignoring request.\n",
+			TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
+			TPG_TFO(tpg)->tpg_get_tag(tpg));
+		spin_unlock(&tpg->tpg_lun_lock);
+		return NULL;
+	}
+	spin_unlock(&tpg->tpg_lun_lock);
+
+	return lun;
+}
+EXPORT_SYMBOL(core_get_lun_from_tpg);
+
+/*      core_dev_get_lun():
+ *
+ *
+ */
+static se_lun_t *core_dev_get_lun(se_portal_group_t *tpg, u32 unpacked_lun)
+{
+	se_lun_t *lun;
+
+	spin_lock(&tpg->tpg_lun_lock);
+	if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
+		printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
+			"_TPG-1: %u for Target Portal Group: %hu\n",
+			TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
+			TRANSPORT_MAX_LUNS_PER_TPG-1,
+			TPG_TFO(tpg)->tpg_get_tag(tpg));
+		spin_unlock(&tpg->tpg_lun_lock);
+		return NULL;
+	}
+	lun = &tpg->tpg_lun_list[unpacked_lun];
+
+	if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
+		printk(KERN_ERR "%s Logical Unit Number: %u is not active on"
+			" Target Portal Group: %hu, ignoring request.\n",
+			TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
+			TPG_TFO(tpg)->tpg_get_tag(tpg));
+		spin_unlock(&tpg->tpg_lun_lock);
+		return NULL;
+	}
+	spin_unlock(&tpg->tpg_lun_lock);
+
+	return lun;
+}
+
+se_lun_acl_t *core_dev_init_initiator_node_lun_acl(
+	se_portal_group_t *tpg,
+	u32 mapped_lun,
+	char *initiatorname,
+	int *ret)
+{
+	se_lun_acl_t *lacl;
+	se_node_acl_t *nacl;
+
+	if (strlen(initiatorname) > TRANSPORT_IQN_LEN) {
+		printk(KERN_ERR "%s InitiatorName exceeds maximum size.\n",
+			TPG_TFO(tpg)->get_fabric_name());
+		*ret = -EOVERFLOW;
+		return NULL;
+	}
+	nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
+	if (!(nacl)) {
+		*ret = -EINVAL;
+		return NULL;
+	}
+	lacl = kzalloc(sizeof(se_lun_acl_t), GFP_KERNEL);
+	if (!(lacl)) {
+		printk(KERN_ERR "Unable to allocate memory for se_lun_acl_t.\n");
+		*ret = -ENOMEM;
+		return NULL;
+	}
+
+	INIT_LIST_HEAD(&lacl->lacl_list);
+	lacl->mapped_lun = mapped_lun;
+	lacl->se_lun_nacl = nacl;
+	snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
+
+	return lacl;
+}
+EXPORT_SYMBOL(core_dev_init_initiator_node_lun_acl);
+
+int core_dev_add_initiator_node_lun_acl(
+	se_portal_group_t *tpg,
+	se_lun_acl_t *lacl,
+	u32 unpacked_lun,
+	u32 lun_access)
+{
+	se_lun_t *lun;
+	se_node_acl_t *nacl;
+
+	lun = core_dev_get_lun(tpg, unpacked_lun);
+	if (!(lun)) {
+		printk(KERN_ERR "%s Logical Unit Number: %u is not active on"
+			" Target Portal Group: %hu, ignoring request.\n",
+			TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
+			TPG_TFO(tpg)->tpg_get_tag(tpg));
+		return -EINVAL;
+	}
+
+	nacl = core_tpg_get_initiator_node_acl(tpg, lacl->initiatorname);
+	if (!(nacl))
+		return -EINVAL;
+
+	spin_lock(&lun->lun_acl_lock);
+	list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
+	atomic_inc(&lun->lun_acl_count);
+	smp_mb__after_atomic_inc();
+	spin_unlock(&lun->lun_acl_lock);
+
+	if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
+	    (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
+		lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
+
+	lacl->se_lun = lun;
+
+	core_update_device_list_for_node(lun, lacl->mapped_lun,
+			lun_access, nacl, tpg, 1);
+
+	printk(KERN_INFO "%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
+		" InitiatorNode: %s\n", TPG_TFO(tpg)->get_fabric_name(),
+		TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
+		(lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
+		lacl->initiatorname);
+
+	return 0;
+}
+EXPORT_SYMBOL(core_dev_add_initiator_node_lun_acl);
+
+/*      core_dev_del_initiator_node_lun_acl():
+ *
+ *
+ */
+int core_dev_del_initiator_node_lun_acl(
+	se_portal_group_t *tpg,
+	se_lun_t *lun,
+	se_lun_acl_t *lacl)
+{
+	se_node_acl_t *nacl;
+
+	nacl = core_tpg_get_initiator_node_acl(tpg, lacl->initiatorname);
+	if (!(nacl))
+		return -EINVAL;
+
+	spin_lock(&lun->lun_acl_lock);
+	list_del(&lacl->lacl_list);
+	atomic_dec(&lun->lun_acl_count);
+	smp_mb__after_atomic_dec();
+	spin_unlock(&lun->lun_acl_lock);
+
+	core_update_device_list_for_node(lun, lacl->mapped_lun,
+		TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
+
+	lacl->se_lun = NULL;
+
+	printk(KERN_INFO "%s_TPG[%hu]_LUN[%u] - Removed ACL for"
+		" InitiatorNode: %s Mapped LUN: %u\n",
+		TPG_TFO(tpg)->get_fabric_name(),
+		TPG_TFO(tpg)->tpg_get_tag(tpg), lun->unpacked_lun,
+		lacl->initiatorname, lacl->mapped_lun);
+
+	return 0;
+}
+EXPORT_SYMBOL(core_dev_del_initiator_node_lun_acl);
+
+void core_dev_free_initiator_node_lun_acl(
+	se_portal_group_t *tpg,
+	se_lun_acl_t *lacl)
+{
+	printk("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
+		" Mapped LUN: %u\n", TPG_TFO(tpg)->get_fabric_name(),
+		TPG_TFO(tpg)->tpg_get_tag(tpg),
+		TPG_TFO(tpg)->get_fabric_name(),
+		lacl->initiatorname, lacl->mapped_lun);
+
+	kfree(lacl);
+}
+EXPORT_SYMBOL(core_dev_free_initiator_node_lun_acl);
diff --git a/include/target/target_core_device.h b/include/target/target_core_device.h
new file mode 100644
index 0000000..9f5a82a
--- /dev/null
+++ b/include/target/target_core_device.h
@@ -0,0 +1,82 @@
+/*******************************************************************************
+ * Filename:  target_core_device.h
+ *
+ * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
+ * Copyright (c) 2006 SBE, Inc.  All Rights Reserved.
+ * 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_DEVICE_H
+#define TARGET_CORE_DEVICE_H
+
+extern se_global_t *se_global;
+
+extern struct block_device *linux_blockdevice_claim_bd(struct block_device *,
+							void *);
+extern struct block_device *__linux_blockdevice_claim(int, int, void *, int *);
+extern struct block_device *linux_blockdevice_claim(int, int, void *);
+extern int linux_blockdevice_release(int, int, struct block_device *);
+extern int linux_blockdevice_check(int, int);
+extern int se_check_devices_access(se_hba_t *);
+extern void se_disable_devices_for_hba(se_hba_t *);
+extern int transport_get_lun_for_cmd(struct se_cmd_s *, unsigned char *, u32);
+extern int transport_get_lun_for_tmr(struct se_cmd_s *, u32);
+extern int core_free_device_list_for_node(se_node_acl_t *,
+					se_portal_group_t *);
+extern void core_dec_lacl_count(struct se_node_acl_s *, struct se_cmd_s *);
+extern void core_update_device_list_access(u32, u32, se_node_acl_t *);
+extern void core_update_device_list_for_node(se_lun_t *lun, u32, u32,
+					se_node_acl_t *, se_portal_group_t *,
+					int);
+extern void core_clear_lun_from_tpg(se_lun_t *, se_portal_group_t *);
+extern struct se_port_s *core_alloc_port(struct se_device_s *);
+extern void core_export_port(struct se_device_s *, struct se_portal_group_s *,
+					struct se_port_s *, struct se_lun_s *);
+extern void core_release_port(struct se_device_s *, struct se_port_s *);
+extern int transport_core_report_lun_response(se_cmd_t *);
+extern void se_release_device_for_hba(se_device_t *);
+extern void se_release_vpd_for_dev(se_device_t *);
+extern void se_clear_dev_ports(se_device_t *);
+extern int se_free_virtual_device(se_device_t *, se_hba_t *);
+extern void se_dev_start(se_device_t *);
+extern void se_dev_stop(se_device_t *);
+extern void se_dev_set_default_attribs(se_device_t *);
+extern int se_dev_set_task_timeout(se_device_t *, u32);
+extern int se_dev_set_emulate_ua_intlck_ctrl(se_device_t *, int);
+extern int se_dev_set_emulate_tas(se_device_t *, int);
+extern int se_dev_set_queue_depth(se_device_t *, u32);
+extern int se_dev_set_max_sectors(se_device_t *, u32);
+extern int se_dev_set_block_size(se_device_t *, u32);
+extern se_lun_t *core_dev_add_lun(se_portal_group_t *, se_hba_t *,
+					se_device_t *, u32);
+extern int core_dev_del_lun(se_portal_group_t *, u32);
+extern se_lun_t *core_get_lun_from_tpg(se_portal_group_t *, u32);
+extern se_lun_acl_t *core_dev_init_initiator_node_lun_acl(se_portal_group_t *,
+							u32, char *, int *);
+extern int core_dev_add_initiator_node_lun_acl(se_portal_group_t *,
+						se_lun_acl_t *, u32, u32);
+extern int core_dev_del_initiator_node_lun_acl(se_portal_group_t *,
+						se_lun_t *, se_lun_acl_t *);
+extern void core_dev_free_initiator_node_lun_acl(se_portal_group_t *,
+						se_lun_acl_t *lacl);
+
+#endif /* TARGET_CORE_DEVICE_H */


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