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Message-Id: <1287441449-19872-1-git-send-email-nab@linux-iscsi.org>
Date: Mon, 18 Oct 2010 15:37:29 -0700
From: "Nicholas A. Bellinger" <nab@...ux-iscsi.org>
To: linux-scsi <linux-scsi@...r.kernel.org>,
linux-kernel <linux-kernel@...r.kernel.org>
Cc: Nicholas Bellinger <nab@...ux-iscsi.org>
Subject: [RFCv3 08/21] tcm: Add device core infrastructure
From: Nicholas Bellinger <nab@...ux-iscsi.org>
The patch adds the core struct se_device functionality that is used internally by
target_core_mod, as well generically by TCM/ConfigFS enabled fabric modules.
This includes the management of struct se_port, the location of struct se_lun for a
struct se_node_acl for an incoming I/O, and handling of the underlying struct
block_device claim and release for TCM backstores.
Signed-off-by: Nicholas A. Bellinger <nab@...ux-iscsi.org>
---
drivers/target/target_core_device.c | 1816 +++++++++++++++++++++++++++++++++++
include/target/target_core_device.h | 73 ++
2 files changed, 1889 insertions(+), 0 deletions(-)
create mode 100644 drivers/target/target_core_device.c
create mode 100644 include/target/target_core_device.h
diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c
new file mode 100644
index 0000000..da30552
--- /dev/null
+++ b/drivers/target/target_core_device.c
@@ -0,0 +1,1816 @@
+/*******************************************************************************
+ * 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) 2007-2010 Rising Tide Systems
+ * Copyright (c) 2008-2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@...nel.org>
+ *
+ * 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.
+ *
+ ******************************************************************************/
+
+#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_tpg.h>
+#include <target/target_core_transport.h>
+#include <target/target_core_fabric_ops.h>
+
+#include "target_core_alua.h"
+#include "target_core_hba.h"
+#include "target_core_pr.h"
+#include "target_core_ua.h"
+
+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) {
+ blkdev_put(bd, FMODE_WRITE|FMODE_READ);
+ *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;
+}
+EXPORT_SYMBOL(linux_blockdevice_claim);
+
+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;
+}
+EXPORT_SYMBOL(linux_blockdevice_release);
+
+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);
+
+extern int __transport_get_lun_for_cmd(
+ struct se_cmd *se_cmd,
+ u32 unpacked_lun)
+{
+ struct se_dev_entry *deve;
+ struct se_lun *se_lun = NULL;
+ struct se_session *se_sess = SE_SESS(se_cmd);
+ unsigned long flags;
+ int read_only = 0;
+
+ spin_lock_irq(&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 == DMA_TO_DEVICE) {
+ if (deve->lun_flags &
+ TRANSPORT_LUNFLAGS_READ_ONLY) {
+ read_only = 1;
+ goto out;
+ }
+ deve->write_bytes += se_cmd->data_length;
+ } else if (se_cmd->data_direction ==
+ DMA_FROM_DEVICE) {
+ deve->read_bytes += se_cmd->data_length;
+ }
+ }
+ 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_ptr = SE_LUN(se_cmd)->lun_se_dev;
+ se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
+ }
+out:
+ spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
+
+ if (!se_lun) {
+ if (read_only) {
+ se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
+ se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ printk("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
+ " Access for 0x%08x\n",
+ CMD_TFO(se_cmd)->get_fabric_name(),
+ unpacked_lun);
+ return -1;
+ } else {
+ /*
+ * Use the se_portal_group->tpg_virt_lun0 to allow for
+ * REPORT_LUNS, et al to be returned when no active
+ * MappedLUN=0 exists for this Initiator Port.
+ */
+ if (unpacked_lun != 0) {
+ se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
+ se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ printk("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
+ " Access for 0x%08x\n",
+ CMD_TFO(se_cmd)->get_fabric_name(),
+ unpacked_lun);
+ return -1;
+ }
+ /*
+ * Force WRITE PROTECT for virtual LUN 0
+ */
+ if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
+ (se_cmd->data_direction != DMA_NONE)) {
+ se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
+ se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ return -1;
+ }
+#if 0
+ printk("TARGET_CORE[%s]: Using virtual LUN0! :-)\n",
+ CMD_TFO(se_cmd)->get_fabric_name());
+#endif
+ se_lun = se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
+ se_cmd->orig_fe_lun = 0;
+ se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev;
+ se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
+ }
+ }
+ /*
+ * Determine if the struct se_lun is online.
+ */
+/* #warning FIXME: Check for LUN_RESET + UNIT Attention */
+ if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
+ se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
+ se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ return -1;
+ }
+
+ {
+ struct se_device *dev = se_lun->lun_se_dev;
+ spin_lock(&dev->stats_lock);
+ dev->num_cmds++;
+ if (se_cmd->data_direction == DMA_TO_DEVICE)
+ dev->write_bytes += se_cmd->data_length;
+ else if (se_cmd->data_direction == DMA_FROM_DEVICE)
+ dev->read_bytes += se_cmd->data_length;
+ spin_unlock(&dev->stats_lock);
+ }
+
+ /*
+ * Add the iscsi_cmd_t to the struct se_lun's cmd list. This list is used
+ * for tracking state of struct se_cmds 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(
+ struct se_cmd *se_cmd,
+ u32 unpacked_lun)
+{
+ struct se_device *dev = NULL;
+ struct se_dev_entry *deve;
+ struct se_lun *se_lun = NULL;
+ struct se_session *se_sess = SE_SESS(se_cmd);
+ struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
+
+ spin_lock_irq(&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->lun_se_dev;
+ se_cmd->pr_res_key = deve->pr_res_key;
+ se_cmd->orig_fe_lun = unpacked_lun;
+ se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev;
+/* se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; */
+ }
+ spin_unlock_irq(&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 struct se_lun is online.
+ */
+/* #warning FIXME: Check for LUN_RESET + UNIT Attention */
+ if (se_dev_check_online(se_lun->lun_se_dev) != 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);
+
+/*
+ * This function is called from core_scsi3_emulate_pro_register_and_move()
+ * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
+ * when a matching rtpi is found.
+ */
+struct se_dev_entry *core_get_se_deve_from_rtpi(
+ struct se_node_acl *nacl,
+ u16 rtpi)
+{
+ struct se_dev_entry *deve;
+ struct se_lun *lun;
+ struct se_port *port;
+ struct se_portal_group *tpg = nacl->se_tpg;
+ u32 i;
+
+ spin_lock_irq(&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;
+
+ lun = deve->se_lun;
+ if (!(lun)) {
+ printk(KERN_ERR "%s device entries device pointer is"
+ " NULL, but Initiator has access.\n",
+ TPG_TFO(tpg)->get_fabric_name());
+ continue;
+ }
+ port = lun->lun_sep;
+ if (!(port)) {
+ printk(KERN_ERR "%s device entries device pointer is"
+ " NULL, but Initiator has access.\n",
+ TPG_TFO(tpg)->get_fabric_name());
+ continue;
+ }
+ if (port->sep_rtpi != rtpi)
+ continue;
+
+ atomic_inc(&deve->pr_ref_count);
+ smp_mb__after_atomic_inc();
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ return deve;
+ }
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ return NULL;
+}
+
+int core_free_device_list_for_node(
+ struct se_node_acl *nacl,
+ struct se_portal_group *tpg)
+{
+ struct se_dev_entry *deve;
+ struct se_lun *lun;
+ u32 i;
+
+ if (!nacl->device_list)
+ return 0;
+
+ spin_lock_irq(&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_irq(&nacl->device_list_lock);
+ core_update_device_list_for_node(lun, NULL, deve->mapped_lun,
+ TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
+ spin_lock_irq(&nacl->device_list_lock);
+ }
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ kfree(nacl->device_list);
+ nacl->device_list = NULL;
+
+ return 0;
+}
+
+void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd)
+{
+ struct se_dev_entry *deve;
+
+ spin_lock_irq(&se_nacl->device_list_lock);
+ deve = &se_nacl->device_list[se_cmd->orig_fe_lun];
+ deve->deve_cmds--;
+ spin_unlock_irq(&se_nacl->device_list_lock);
+
+ return;
+}
+
+void core_update_device_list_access(
+ u32 mapped_lun,
+ u32 lun_access,
+ struct se_node_acl *nacl)
+{
+ struct se_dev_entry *deve;
+
+ spin_lock_irq(&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_irq(&nacl->device_list_lock);
+
+ return;
+}
+EXPORT_SYMBOL(core_update_device_list_access);
+
+/* core_update_device_list_for_node():
+ *
+ *
+ */
+int core_update_device_list_for_node(
+ struct se_lun *lun,
+ struct se_lun_acl *lun_acl,
+ u32 mapped_lun,
+ u32 lun_access,
+ struct se_node_acl *nacl,
+ struct se_portal_group *tpg,
+ int enable)
+{
+ struct se_port *port = lun->lun_sep;
+ struct se_dev_entry *deve = &nacl->device_list[mapped_lun];
+ int trans = 0;
+ /*
+ * If the MappedLUN entry is being disabled, the entry in
+ * port->sep_alua_list must be removed now before clearing the
+ * struct se_dev_entry pointers below as logic in
+ * core_alua_do_transition_tg_pt() depends on these being present.
+ */
+ if (!(enable)) {
+ if (!(deve->se_lun_acl)) {
+ dump_stack();
+ return 0;
+ }
+ spin_lock_bh(&port->sep_alua_lock);
+ list_del(&deve->alua_port_list);
+ spin_unlock_bh(&port->sep_alua_lock);
+ }
+
+ spin_lock_irq(&nacl->device_list_lock);
+ if (enable) {
+ /*
+ * Check if the call is handling demo mode -> explict LUN ACL
+ * transition. This transition must be for the same struct se_lun
+ * + mapped_lun that was setup in demo mode..
+ */
+ if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
+ if (deve->se_lun_acl != NULL) {
+ printk(KERN_ERR "struct se_dev_entry->se_lun_acl"
+ " already set for demo mode -> explict"
+ " LUN ACL transition\n");
+ return -1;
+ }
+ if (deve->se_lun != lun) {
+ printk(KERN_ERR "struct se_dev_entry->se_lun does"
+ " match passed struct se_lun for demo mode"
+ " -> explict LUN ACL transition\n");
+ return -1;
+ }
+ deve->se_lun_acl = lun_acl;
+ trans = 1;
+ } else {
+ deve->se_lun = lun;
+ deve->se_lun_acl = lun_acl;
+ 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;
+ }
+
+ if (trans) {
+ spin_unlock_irq(&nacl->device_list_lock);
+ return 0;
+ }
+ deve->creation_time = get_jiffies_64();
+ deve->attach_count++;
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ spin_lock_bh(&port->sep_alua_lock);
+ list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
+ spin_unlock_bh(&port->sep_alua_lock);
+
+ return 0;
+ }
+ /*
+ * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
+ * PR operation to complete.
+ */
+ spin_unlock_irq(&nacl->device_list_lock);
+ while (atomic_read(&deve->pr_ref_count) != 0)
+ cpu_relax();
+ spin_lock_irq(&nacl->device_list_lock);
+ /*
+ * Disable struct se_dev_entry LUN ACL mapping
+ */
+ core_scsi3_ua_release_all(deve);
+ deve->se_lun = NULL;
+ deve->se_lun_acl = NULL;
+ deve->lun_flags = 0;
+ deve->creation_time = 0;
+ deve->attach_count--;
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
+ return 0;
+}
+
+/* core_clear_lun_from_tpg():
+ *
+ *
+ */
+void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
+{
+ struct se_node_acl *nacl;
+ struct se_dev_entry *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_irq(&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_irq(&nacl->device_list_lock);
+
+ core_update_device_list_for_node(lun, NULL,
+ deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
+ nacl, tpg, 0);
+
+ spin_lock_irq(&nacl->device_list_lock);
+ }
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ spin_lock_bh(&tpg->acl_node_lock);
+ }
+ spin_unlock_bh(&tpg->acl_node_lock);
+
+ return;
+}
+
+struct se_port *core_alloc_port(struct se_device *dev)
+{
+ struct se_port *port, *port_tmp;
+
+ port = kzalloc(sizeof(struct se_port), GFP_KERNEL);
+ if (!(port)) {
+ printk(KERN_ERR "Unable to allocate struct se_port\n");
+ return NULL;
+ }
+ INIT_LIST_HEAD(&port->sep_alua_list);
+ INIT_LIST_HEAD(&port->sep_list);
+ atomic_set(&port->sep_tg_pt_secondary_offline, 0);
+ spin_lock_init(&port->sep_alua_lock);
+ mutex_init(&port->sep_tg_pt_md_mutex);
+
+ 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 struct se_device
+ * 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(
+ struct se_device *dev,
+ struct se_portal_group *tpg,
+ struct se_port *port,
+ struct se_lun *lun)
+{
+ struct se_subsystem_dev *su_dev = SU_DEV(dev);
+ struct t10_alua_tg_pt_gp_member *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,
+ T10_ALUA(su_dev)->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: alua/default_tg_pt_gp\n",
+ TRANSPORT(dev)->name, TPG_TFO(tpg)->get_fabric_name());
+ }
+
+ dev->dev_port_count++;
+ port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */
+}
+
+/*
+ * Called with struct se_device->se_port_lock spinlock held.
+ */
+void core_release_port(struct se_device *dev, struct se_port *port)
+{
+ /*
+ * Wait for any port reference for PR ALL_TG_PT=1 operation
+ * to complete in __core_scsi3_alloc_registration()
+ */
+ spin_unlock(&dev->se_port_lock);
+ if (atomic_read(&port->sep_tg_pt_ref_cnt))
+ cpu_relax();
+ spin_lock(&dev->se_port_lock);
+
+ core_alua_free_tg_pt_gp_mem(port);
+
+ list_del(&port->sep_list);
+ dev->dev_port_count--;
+ kfree(port);
+
+ return;
+}
+
+int core_dev_export(
+ struct se_device *dev,
+ struct se_portal_group *tpg,
+ struct se_lun *lun)
+{
+ struct se_port *port;
+
+ port = core_alloc_port(dev);
+ if (!(port))
+ return -1;
+
+ lun->lun_se_dev = dev;
+ se_dev_start(dev);
+
+ atomic_inc(&dev->dev_export_obj.obj_access_count);
+ core_export_port(dev, tpg, port, lun);
+ return 0;
+}
+
+void core_dev_unexport(
+ struct se_device *dev,
+ struct se_portal_group *tpg,
+ struct se_lun *lun)
+{
+ struct se_port *port = lun->lun_sep;
+
+ spin_lock(&lun->lun_sep_lock);
+ if (lun->lun_se_dev == NULL) {
+ spin_unlock(&lun->lun_sep_lock);
+ return;
+ }
+ spin_unlock(&lun->lun_sep_lock);
+
+ spin_lock(&dev->se_port_lock);
+ atomic_dec(&dev->dev_export_obj.obj_access_count);
+ core_release_port(dev, port);
+ spin_unlock(&dev->se_port_lock);
+
+ se_dev_stop(dev);
+ lun->lun_se_dev = NULL;
+}
+
+int transport_core_report_lun_response(struct se_cmd *se_cmd)
+{
+ struct se_dev_entry *deve;
+ struct se_lun *se_lun;
+ struct se_session *se_sess = SE_SESS(se_cmd);
+ struct se_task *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 struct se_task for struct se_cmd\n");
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+ }
+
+ /*
+ * If no struct se_session pointer is present, this struct se_cmd 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_irq(&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_irq(&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(struct se_device *dev)
+{
+ struct se_hba *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(struct se_device *dev)
+{
+ struct t10_vpd *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(
+ struct se_cmd *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 struct se_hba->device_lock held.
+ */
+void se_clear_dev_ports(struct se_device *dev)
+{
+ struct se_hba *hba = dev->se_hba;
+ struct se_lun *lun;
+ struct se_portal_group *tpg;
+ struct se_port *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_se_dev == NULL) {
+ spin_unlock(&lun->lun_sep_lock);
+ continue;
+ }
+ spin_unlock(&lun->lun_sep_lock);
+
+ core_dev_del_lun(tpg, lun->unpacked_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(struct se_device *dev, struct se_hba *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(struct se_device *dev)
+{
+ struct se_hba *hba = dev->se_hba;
+
+ spin_lock(&hba->device_lock);
+ atomic_inc(&dev->dev_obj.obj_access_count);
+ if (atomic_read(&dev->dev_obj.obj_access_count) == 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(struct se_device *dev)
+{
+ struct se_hba *hba = dev->se_hba;
+
+ spin_lock(&hba->device_lock);
+ atomic_dec(&dev->dev_obj.obj_access_count);
+ if (atomic_read(&dev->dev_obj.obj_access_count) == 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))
+ cpu_relax();
+}
+
+int se_dev_check_online(struct se_device *dev)
+{
+ int ret;
+
+ spin_lock_irq(&dev->dev_status_lock);
+ ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
+ (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1;
+ spin_unlock_irq(&dev->dev_status_lock);
+
+ return ret;
+}
+
+int se_dev_check_shutdown(struct se_device *dev)
+{
+ int ret;
+
+ spin_lock_irq(&dev->dev_status_lock);
+ ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN);
+ spin_unlock_irq(&dev->dev_status_lock);
+
+ return ret;
+}
+
+void se_dev_set_default_attribs(
+ struct se_device *dev,
+ struct se_dev_limits *dev_limits)
+{
+ struct queue_limits *limits = &dev_limits->limits;
+
+ DEV_ATTRIB(dev)->emulate_dpo = DA_EMULATE_DPO;
+ DEV_ATTRIB(dev)->emulate_fua_write = DA_EMULATE_FUA_WRITE;
+ DEV_ATTRIB(dev)->emulate_fua_read = DA_EMULATE_FUA_READ;
+ DEV_ATTRIB(dev)->emulate_write_cache = DA_EMULATE_WRITE_CACHE;
+ DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
+ DEV_ATTRIB(dev)->emulate_tas = DA_EMULATE_TAS;
+ DEV_ATTRIB(dev)->emulate_tpu = DA_EMULATE_TPU;
+ DEV_ATTRIB(dev)->emulate_tpws = DA_EMULATE_TPWS;
+ DEV_ATTRIB(dev)->emulate_reservations = DA_EMULATE_RESERVATIONS;
+ DEV_ATTRIB(dev)->emulate_alua = DA_EMULATE_ALUA;
+ DEV_ATTRIB(dev)->enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
+ /*
+ * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK
+ * iblock_create_virtdevice() from struct queue_limits values
+ * if blk_queue_discard()==1
+ */
+ DEV_ATTRIB(dev)->max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
+ DEV_ATTRIB(dev)->max_unmap_block_desc_count =
+ DA_MAX_UNMAP_BLOCK_DESC_COUNT;
+ DEV_ATTRIB(dev)->unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
+ DEV_ATTRIB(dev)->unmap_granularity_alignment =
+ DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
+ /*
+ * max_cdb_len is based on subsystem plugin dependent requirements.
+ */
+ DEV_ATTRIB(dev)->max_cdb_len = dev_limits->max_cdb_len;
+ /*
+ * block_size is based on subsystem plugin dependent requirements.
+ */
+ DEV_ATTRIB(dev)->hw_block_size = limits->logical_block_size;
+ DEV_ATTRIB(dev)->block_size = limits->logical_block_size;
+ /*
+ * max_sectors is based on subsystem plugin dependent requirements.
+ */
+ DEV_ATTRIB(dev)->hw_max_sectors = limits->max_hw_sectors;
+ DEV_ATTRIB(dev)->max_sectors = limits->max_sectors;
+ /*
+ * Set optimal_sectors from max_sectors, which can be lowered via
+ * configfs.
+ */
+ DEV_ATTRIB(dev)->optimal_sectors = limits->max_sectors;
+ /*
+ * queue_depth is based on subsystem plugin dependent requirements.
+ */
+ DEV_ATTRIB(dev)->hw_queue_depth = dev_limits->hw_queue_depth;
+ DEV_ATTRIB(dev)->queue_depth = dev_limits->queue_depth;
+}
+
+int se_dev_set_task_timeout(struct se_device *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_max_unmap_lba_count(
+ struct se_device *dev,
+ u32 max_unmap_lba_count)
+{
+ DEV_ATTRIB(dev)->max_unmap_lba_count = max_unmap_lba_count;
+ printk(KERN_INFO "dev[%p]: Set max_unmap_lba_count: %u\n",
+ dev, DEV_ATTRIB(dev)->max_unmap_lba_count);
+ return 0;
+}
+
+int se_dev_set_max_unmap_block_desc_count(
+ struct se_device *dev,
+ u32 max_unmap_block_desc_count)
+{
+ DEV_ATTRIB(dev)->max_unmap_block_desc_count = max_unmap_block_desc_count;
+ printk(KERN_INFO "dev[%p]: Set max_unmap_block_desc_count: %u\n",
+ dev, DEV_ATTRIB(dev)->max_unmap_block_desc_count);
+ return 0;
+}
+
+int se_dev_set_unmap_granularity(
+ struct se_device *dev,
+ u32 unmap_granularity)
+{
+ DEV_ATTRIB(dev)->unmap_granularity = unmap_granularity;
+ printk(KERN_INFO "dev[%p]: Set unmap_granularity: %u\n",
+ dev, DEV_ATTRIB(dev)->unmap_granularity);
+ return 0;
+}
+
+int se_dev_set_unmap_granularity_alignment(
+ struct se_device *dev,
+ u32 unmap_granularity_alignment)
+{
+ DEV_ATTRIB(dev)->unmap_granularity_alignment = unmap_granularity_alignment;
+ printk(KERN_INFO "dev[%p]: Set unmap_granularity_alignment: %u\n",
+ dev, DEV_ATTRIB(dev)->unmap_granularity_alignment);
+ return 0;
+}
+
+int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
+{
+ if ((flag != 0) && (flag != 1)) {
+ printk(KERN_ERR "Illegal value %d\n", flag);
+ return -1;
+ }
+ if (TRANSPORT(dev)->dpo_emulated == NULL) {
+ printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated is NULL\n");
+ return -1;
+ }
+ if (TRANSPORT(dev)->dpo_emulated(dev) == 0) {
+ printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated not supported\n");
+ return -1;
+ }
+ DEV_ATTRIB(dev)->emulate_dpo = flag;
+ printk(KERN_INFO "dev[%p]: SE Device Page Out (DPO) Emulation"
+ " bit: %d\n", dev, DEV_ATTRIB(dev)->emulate_dpo);
+ return 0;
+}
+
+int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
+{
+ if ((flag != 0) && (flag != 1)) {
+ printk(KERN_ERR "Illegal value %d\n", flag);
+ return -1;
+ }
+ if (TRANSPORT(dev)->fua_write_emulated == NULL) {
+ printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated is NULL\n");
+ return -1;
+ }
+ if (TRANSPORT(dev)->fua_write_emulated(dev) == 0) {
+ printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated not supported\n");
+ return -1;
+ }
+ DEV_ATTRIB(dev)->emulate_fua_write = flag;
+ printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
+ dev, DEV_ATTRIB(dev)->emulate_fua_write);
+ return 0;
+}
+
+int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
+{
+ if ((flag != 0) && (flag != 1)) {
+ printk(KERN_ERR "Illegal value %d\n", flag);
+ return -1;
+ }
+ if (TRANSPORT(dev)->fua_read_emulated == NULL) {
+ printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated is NULL\n");
+ return -1;
+ }
+ if (TRANSPORT(dev)->fua_read_emulated(dev) == 0) {
+ printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated not supported\n");
+ return -1;
+ }
+ DEV_ATTRIB(dev)->emulate_fua_read = flag;
+ printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access READs: %d\n",
+ dev, DEV_ATTRIB(dev)->emulate_fua_read);
+ return 0;
+}
+
+int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
+{
+ if ((flag != 0) && (flag != 1)) {
+ printk(KERN_ERR "Illegal value %d\n", flag);
+ return -1;
+ }
+ if (TRANSPORT(dev)->write_cache_emulated == NULL) {
+ printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated is NULL\n");
+ return -1;
+ }
+ if (TRANSPORT(dev)->write_cache_emulated(dev) == 0) {
+ printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated not supported\n");
+ return -1;
+ }
+ DEV_ATTRIB(dev)->emulate_write_cache = flag;
+ printk(KERN_INFO "dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
+ dev, DEV_ATTRIB(dev)->emulate_write_cache);
+ return 0;
+}
+
+int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
+{
+ if ((flag != 0) && (flag != 1) && (flag != 2)) {
+ printk(KERN_ERR "Illegal value %d\n", flag);
+ return -1;
+ }
+
+ if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+ printk(KERN_ERR "dev[%p]: Unable to change SE Device"
+ " UA_INTRLCK_CTRL while dev_export_obj: %d count"
+ " exists\n", dev,
+ atomic_read(&dev->dev_export_obj.obj_access_count));
+ 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(struct se_device *dev, int flag)
+{
+ if ((flag != 0) && (flag != 1)) {
+ printk(KERN_ERR "Illegal value %d\n", flag);
+ return -1;
+ }
+
+ if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+ printk(KERN_ERR "dev[%p]: Unable to change SE Device TAS while"
+ " dev_export_obj: %d count exists\n", dev,
+ atomic_read(&dev->dev_export_obj.obj_access_count));
+ 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;
+}
+
+int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
+{
+ if ((flag != 0) && (flag != 1)) {
+ printk(KERN_ERR "Illegal value %d\n", flag);
+ return -1;
+ }
+ /*
+ * We expect this value to be non-zero when generic Block Layer
+ * Discard supported is detected iblock_create_virtdevice().
+ */
+ if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) {
+ printk(KERN_ERR "Generic Block Discard not supported\n");
+ return -ENOSYS;
+ }
+
+ DEV_ATTRIB(dev)->emulate_tpu = flag;
+ printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
+ dev, flag);
+ return 0;
+}
+
+int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
+{
+ if ((flag != 0) && (flag != 1)) {
+ printk(KERN_ERR "Illegal value %d\n", flag);
+ return -1;
+ }
+ /*
+ * We expect this value to be non-zero when generic Block Layer
+ * Discard supported is detected iblock_create_virtdevice().
+ */
+ if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) {
+ printk(KERN_ERR "Generic Block Discard not supported\n");
+ return -ENOSYS;
+ }
+
+ DEV_ATTRIB(dev)->emulate_tpws = flag;
+ printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
+ dev, flag);
+ return 0;
+}
+
+int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
+{
+ if ((flag != 0) && (flag != 1)) {
+ printk(KERN_ERR "Illegal value %d\n", flag);
+ return -1;
+ }
+ DEV_ATTRIB(dev)->enforce_pr_isids = flag;
+ printk(KERN_INFO "dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
+ (DEV_ATTRIB(dev)->enforce_pr_isids) ? "Enabled" : "Disabled");
+ return 0;
+}
+
+/*
+ * Note, this can only be called on unexported SE Device Object.
+ */
+int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
+{
+ u32 orig_queue_depth = dev->queue_depth;
+
+ if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+ printk(KERN_ERR "dev[%p]: Unable to change SE Device TCQ while"
+ " dev_export_obj: %d count exists\n", dev,
+ atomic_read(&dev->dev_export_obj.obj_access_count));
+ 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 > DEV_ATTRIB(dev)->hw_queue_depth) {
+ printk(KERN_ERR "dev[%p]: Passed queue_depth: %u"
+ " exceeds TCM/SE_Device TCQ: %u\n",
+ dev, queue_depth,
+ DEV_ATTRIB(dev)->hw_queue_depth);
+ return -1;
+ }
+ } else {
+ if (queue_depth > DEV_ATTRIB(dev)->queue_depth) {
+ if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) {
+ printk(KERN_ERR "dev[%p]: Passed queue_depth:"
+ " %u exceeds TCM/SE_Device MAX"
+ " TCQ: %u\n", dev, queue_depth,
+ DEV_ATTRIB(dev)->hw_queue_depth);
+ 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;
+}
+
+int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors)
+{
+ int force = 0; /* Force setting for VDEVS */
+
+ if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+ printk(KERN_ERR "dev[%p]: Unable to change SE Device"
+ " max_sectors while dev_export_obj: %d count exists\n",
+ dev, atomic_read(&dev->dev_export_obj.obj_access_count));
+ 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 > DEV_ATTRIB(dev)->hw_max_sectors) {
+ printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
+ " greater than TCM/SE_Device max_sectors:"
+ " %u\n", dev, max_sectors,
+ DEV_ATTRIB(dev)->hw_max_sectors);
+ return -1;
+ }
+ } else {
+ if (!(force) && (max_sectors >
+ DEV_ATTRIB(dev)->hw_max_sectors)) {
+ printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
+ " greater than TCM/SE_Device max_sectors"
+ ": %u, use force=1 to override.\n", dev,
+ max_sectors, DEV_ATTRIB(dev)->hw_max_sectors);
+ 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_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
+{
+ if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+ printk(KERN_ERR "dev[%p]: Unable to change SE Device"
+ " optimal_sectors while dev_export_obj: %d count exists\n",
+ dev, atomic_read(&dev->dev_export_obj.obj_access_count));
+ return -EINVAL;
+ }
+ if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
+ printk(KERN_ERR "dev[%p]: Passed optimal_sectors cannot be"
+ " changed for TCM/pSCSI\n", dev);
+ return -EINVAL;
+ }
+ if (optimal_sectors > DEV_ATTRIB(dev)->max_sectors) {
+ printk(KERN_ERR "dev[%p]: Passed optimal_sectors %u cannot be"
+ " greater than max_sectors: %u\n", dev,
+ optimal_sectors, DEV_ATTRIB(dev)->max_sectors);
+ return -EINVAL;
+ }
+
+ DEV_ATTRIB(dev)->optimal_sectors = optimal_sectors;
+ printk(KERN_INFO "dev[%p]: SE Device optimal_sectors changed to %u\n",
+ dev, optimal_sectors);
+ return 0;
+}
+
+int se_dev_set_block_size(struct se_device *dev, u32 block_size)
+{
+ if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+ printk(KERN_ERR "dev[%p]: Unable to change SE Device block_size"
+ " while dev_export_obj: %d count exists\n", dev,
+ atomic_read(&dev->dev_export_obj.obj_access_count));
+ 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;
+}
+
+struct se_lun *core_dev_add_lun(
+ struct se_portal_group *tpg,
+ struct se_hba *hba,
+ struct se_device *dev,
+ u32 lun)
+{
+ struct se_lun *lun_p;
+ u32 lun_access = 0;
+
+ if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) {
+ printk(KERN_ERR "Unable to export struct se_device while dev_access_obj: %d\n",
+ atomic_read(&dev->dev_access_obj.obj_access_count));
+ return NULL;
+ }
+
+ lun_p = core_tpg_pre_addlun(tpg, lun);
+ if ((IS_ERR(lun_p)) || !(lun_p))
+ return NULL;
+
+ if (dev->dev_flags & DF_READ_ONLY)
+ lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
+ else
+ lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
+
+ if (core_tpg_post_addlun(tpg, lun_p, lun_access, dev) < 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)) {
+ struct se_node_acl *acl;
+ spin_lock_bh(&tpg->acl_node_lock);
+ list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
+ if (acl->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(
+ struct se_portal_group *tpg,
+ u32 unpacked_lun)
+{
+ struct se_lun *lun;
+ int ret = 0;
+
+ lun = core_tpg_pre_dellun(tpg, unpacked_lun, &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);
+
+struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
+{
+ struct se_lun *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 struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
+{
+ struct se_lun *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;
+}
+
+struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
+ struct se_portal_group *tpg,
+ u32 mapped_lun,
+ char *initiatorname,
+ int *ret)
+{
+ struct se_lun_acl *lacl;
+ struct se_node_acl *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(struct se_lun_acl), GFP_KERNEL);
+ if (!(lacl)) {
+ printk(KERN_ERR "Unable to allocate memory for struct se_lun_acl.\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(
+ struct se_portal_group *tpg,
+ struct se_lun_acl *lacl,
+ u32 unpacked_lun,
+ u32 lun_access)
+{
+ struct se_lun *lun;
+ struct se_node_acl *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 = lacl->se_lun_nacl;
+ if (!(nacl))
+ return -EINVAL;
+
+ if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
+ (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
+ lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
+
+ lacl->se_lun = lun;
+
+ if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun,
+ lun_access, nacl, tpg, 1) < 0)
+ 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);
+
+ 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);
+ /*
+ * Check to see if there are any existing persistent reservation APTPL
+ * pre-registrations that need to be enabled for this LUN ACL..
+ */
+ core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl);
+ 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(
+ struct se_portal_group *tpg,
+ struct se_lun *lun,
+ struct se_lun_acl *lacl)
+{
+ struct se_node_acl *nacl;
+
+ nacl = lacl->se_lun_nacl;
+ 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, NULL, 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(
+ struct se_portal_group *tpg,
+ struct se_lun_acl *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);
+
+int core_dev_setup_virtual_lun0(void)
+{
+ struct se_hba *hba;
+ struct se_device *dev;
+ struct se_subsystem_dev *se_dev = NULL;
+ struct se_subsystem_api *t;
+ char buf[16];
+ int ret;
+
+ hba = core_alloc_hba();
+ if (!(hba))
+ return -ENOMEM;
+
+ hba->hba_flags |= HBA_FLAGS_INTERNAL_USE;
+ ret = se_core_add_hba(hba, "rd_dr", 0);
+ if (ret < 0) {
+ printk("se_core_add_hba() with %d\n", ret);
+ kmem_cache_free(se_hba_cache, hba);
+ return ret;
+ }
+
+ se_global->g_lun0_hba = hba;
+ t = hba->transport;
+
+ se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
+ if (!(se_dev)) {
+ printk(KERN_ERR "Unable to allocate memory for"
+ " struct se_subsystem_dev\n");
+ ret = -ENOMEM;
+ goto out;
+ }
+ INIT_LIST_HEAD(&se_dev->g_se_dev_list);
+ INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
+ spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
+ INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list);
+ INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list);
+ spin_lock_init(&se_dev->t10_reservation.registration_lock);
+ spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock);
+ INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
+ spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
+ spin_lock_init(&se_dev->se_dev_lock);
+ se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
+ se_dev->t10_wwn.t10_sub_dev = se_dev;
+ se_dev->t10_alua.t10_sub_dev = se_dev;
+ se_dev->se_dev_attrib.da_sub_dev = se_dev;
+
+ se_dev->se_dev_hba = hba;
+
+ se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0");
+ if (!(se_dev->se_dev_su_ptr)) {
+ printk(KERN_ERR "Unable to locate subsystem dependent pointer"
+ " from allocate_virtdevice()\n");
+ ret = -ENOMEM;
+ goto out;
+ }
+ se_global->g_lun0_su_dev = se_dev;
+
+ memset(buf, 0, 16);
+ sprintf(buf, "rd_pages=8");
+ t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf));
+
+ dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
+ if (!(dev) || IS_ERR(dev)) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ se_dev->se_dev_ptr = dev;
+ se_global->g_lun0_dev = dev;
+
+ return 0;
+out:
+ se_global->g_lun0_su_dev = NULL;
+ kfree(se_dev);
+ if (se_global->g_lun0_hba) {
+ se_core_del_hba(se_global->g_lun0_hba);
+ se_global->g_lun0_hba = NULL;
+ }
+ return ret;
+}
+
+
+void core_dev_release_virtual_lun0(void)
+{
+ struct se_hba *hba = se_global->g_lun0_hba;
+ struct se_subsystem_dev *su_dev = se_global->g_lun0_su_dev;
+
+ if (!(hba))
+ return;
+
+ if (se_global->g_lun0_dev)
+ se_free_virtual_device(se_global->g_lun0_dev, hba);
+
+ kfree(su_dev);
+ se_core_del_hba(hba);
+}
diff --git a/include/target/target_core_device.h b/include/target/target_core_device.h
new file mode 100644
index 0000000..f440372
--- /dev/null
+++ b/include/target/target_core_device.h
@@ -0,0 +1,73 @@
+#ifndef TARGET_CORE_DEVICE_H
+#define TARGET_CORE_DEVICE_H
+
+extern struct se_global *se_global;
+
+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 transport_get_lun_for_cmd(struct se_cmd *, unsigned char *, u32);
+extern int transport_get_lun_for_tmr(struct se_cmd *, u32);
+extern struct se_dev_entry *core_get_se_deve_from_rtpi(
+ struct se_node_acl *, u16);
+extern int core_free_device_list_for_node(struct se_node_acl *,
+ struct se_portal_group *);
+extern void core_dec_lacl_count(struct se_node_acl *, struct se_cmd *);
+extern void core_update_device_list_access(u32, u32, struct se_node_acl *);
+extern int core_update_device_list_for_node(struct se_lun *, struct se_lun_acl *, u32,
+ u32, struct se_node_acl *,
+ struct se_portal_group *, int);
+extern void core_clear_lun_from_tpg(struct se_lun *, struct se_portal_group *);
+extern struct se_port *core_alloc_port(struct se_device *);
+extern void core_export_port(struct se_device *, struct se_portal_group *,
+ struct se_port *, struct se_lun *);
+extern void core_release_port(struct se_device *, struct se_port *);
+extern int core_dev_export(struct se_device *, struct se_portal_group *,
+ struct se_lun *);
+extern void core_dev_unexport(struct se_device *, struct se_portal_group *,
+ struct se_lun *);
+extern int transport_core_report_lun_response(struct se_cmd *);
+extern void se_release_device_for_hba(struct se_device *);
+extern void se_release_vpd_for_dev(struct se_device *);
+extern void se_clear_dev_ports(struct se_device *);
+extern int se_free_virtual_device(struct se_device *, struct se_hba *);
+extern void se_dev_start(struct se_device *);
+extern void se_dev_stop(struct se_device *);
+extern int se_dev_check_online(struct se_device *);
+extern int se_dev_check_shutdown(struct se_device *);
+extern void se_dev_set_default_attribs(struct se_device *, struct se_dev_limits *);
+extern int se_dev_set_task_timeout(struct se_device *, u32);
+extern int se_dev_set_max_unmap_lba_count(struct se_device *, u32);
+extern int se_dev_set_max_unmap_block_desc_count(struct se_device *, u32);
+extern int se_dev_set_unmap_granularity(struct se_device *, u32);
+extern int se_dev_set_unmap_granularity_alignment(struct se_device *, u32);
+extern int se_dev_set_emulate_dpo(struct se_device *, int);
+extern int se_dev_set_emulate_fua_write(struct se_device *, int);
+extern int se_dev_set_emulate_fua_read(struct se_device *, int);
+extern int se_dev_set_emulate_write_cache(struct se_device *, int);
+extern int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *, int);
+extern int se_dev_set_emulate_tas(struct se_device *, int);
+extern int se_dev_set_emulate_tpu(struct se_device *, int);
+extern int se_dev_set_emulate_tpws(struct se_device *, int);
+extern int se_dev_set_enforce_pr_isids(struct se_device *, int);
+extern int se_dev_set_queue_depth(struct se_device *, u32);
+extern int se_dev_set_max_sectors(struct se_device *, u32);
+extern int se_dev_set_optimal_sectors(struct se_device *, u32);
+extern int se_dev_set_block_size(struct se_device *, u32);
+extern struct se_lun *core_dev_add_lun(struct se_portal_group *, struct se_hba *,
+ struct se_device *, u32);
+extern int core_dev_del_lun(struct se_portal_group *, u32);
+extern struct se_lun *core_get_lun_from_tpg(struct se_portal_group *, u32);
+extern struct se_lun_acl *core_dev_init_initiator_node_lun_acl(struct se_portal_group *,
+ u32, char *, int *);
+extern int core_dev_add_initiator_node_lun_acl(struct se_portal_group *,
+ struct se_lun_acl *, u32, u32);
+extern int core_dev_del_initiator_node_lun_acl(struct se_portal_group *,
+ struct se_lun *, struct se_lun_acl *);
+extern void core_dev_free_initiator_node_lun_acl(struct se_portal_group *,
+ struct se_lun_acl *lacl);
+extern int core_dev_setup_virtual_lun0(void);
+extern void core_dev_release_virtual_lun0(void);
+
+#endif /* TARGET_CORE_DEVICE_H */
--
1.7.3.1
--
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