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af8772926f
The last functionality of the target processing thread is offloading possibly long running task management requests from the submitter context. To keep TMR semantics the same we need a single threaded ordered queue, which can be provided by a per-device workqueue with the right flags. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
1629 lines
46 KiB
C
1629 lines
46 KiB
C
/*******************************************************************************
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* Filename: target_core_device.c (based on iscsi_target_device.c)
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*
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* This file contains the TCM Virtual Device and Disk Transport
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* agnostic related functions.
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*
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* Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
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* Copyright (c) 2005-2006 SBE, Inc. All Rights Reserved.
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* Copyright (c) 2007-2010 Rising Tide Systems
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* Copyright (c) 2008-2010 Linux-iSCSI.org
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*
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* Nicholas A. Bellinger <nab@kernel.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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******************************************************************************/
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#include <linux/net.h>
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#include <linux/string.h>
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#include <linux/delay.h>
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#include <linux/timer.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/kthread.h>
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#include <linux/in.h>
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#include <linux/export.h>
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#include <net/sock.h>
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#include <net/tcp.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_device.h>
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#include <target/target_core_base.h>
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#include <target/target_core_backend.h>
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#include <target/target_core_fabric.h>
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#include "target_core_internal.h"
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#include "target_core_alua.h"
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#include "target_core_pr.h"
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#include "target_core_ua.h"
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static void se_dev_start(struct se_device *dev);
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static void se_dev_stop(struct se_device *dev);
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static struct se_hba *lun0_hba;
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static struct se_subsystem_dev *lun0_su_dev;
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/* not static, needed by tpg.c */
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struct se_device *g_lun0_dev;
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int transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
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{
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struct se_lun *se_lun = NULL;
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struct se_session *se_sess = se_cmd->se_sess;
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struct se_device *dev;
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unsigned long flags;
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if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
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se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
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se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
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return -ENODEV;
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}
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spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
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se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun];
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if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
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struct se_dev_entry *deve = se_cmd->se_deve;
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deve->total_cmds++;
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deve->total_bytes += se_cmd->data_length;
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if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
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(deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
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se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
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se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
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pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
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" Access for 0x%08x\n",
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se_cmd->se_tfo->get_fabric_name(),
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unpacked_lun);
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spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
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return -EACCES;
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}
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if (se_cmd->data_direction == DMA_TO_DEVICE)
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deve->write_bytes += se_cmd->data_length;
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else if (se_cmd->data_direction == DMA_FROM_DEVICE)
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deve->read_bytes += se_cmd->data_length;
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deve->deve_cmds++;
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se_lun = deve->se_lun;
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se_cmd->se_lun = deve->se_lun;
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se_cmd->pr_res_key = deve->pr_res_key;
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se_cmd->orig_fe_lun = unpacked_lun;
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se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
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}
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spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
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if (!se_lun) {
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/*
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* Use the se_portal_group->tpg_virt_lun0 to allow for
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* REPORT_LUNS, et al to be returned when no active
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* MappedLUN=0 exists for this Initiator Port.
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*/
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if (unpacked_lun != 0) {
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se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
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se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
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pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
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" Access for 0x%08x\n",
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se_cmd->se_tfo->get_fabric_name(),
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unpacked_lun);
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return -ENODEV;
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}
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/*
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* Force WRITE PROTECT for virtual LUN 0
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*/
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if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
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(se_cmd->data_direction != DMA_NONE)) {
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se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
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se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
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return -EACCES;
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}
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se_lun = &se_sess->se_tpg->tpg_virt_lun0;
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se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
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se_cmd->orig_fe_lun = 0;
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se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
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}
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/*
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* Determine if the struct se_lun is online.
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* FIXME: Check for LUN_RESET + UNIT Attention
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*/
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if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
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se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
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se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
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return -ENODEV;
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}
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/* Directly associate cmd with se_dev */
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se_cmd->se_dev = se_lun->lun_se_dev;
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/* TODO: get rid of this and use atomics for stats */
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dev = se_lun->lun_se_dev;
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spin_lock_irqsave(&dev->stats_lock, flags);
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dev->num_cmds++;
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if (se_cmd->data_direction == DMA_TO_DEVICE)
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dev->write_bytes += se_cmd->data_length;
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else if (se_cmd->data_direction == DMA_FROM_DEVICE)
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dev->read_bytes += se_cmd->data_length;
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spin_unlock_irqrestore(&dev->stats_lock, flags);
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spin_lock_irqsave(&se_lun->lun_cmd_lock, flags);
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list_add_tail(&se_cmd->se_lun_node, &se_lun->lun_cmd_list);
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spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags);
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return 0;
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}
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EXPORT_SYMBOL(transport_lookup_cmd_lun);
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int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
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{
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struct se_dev_entry *deve;
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struct se_lun *se_lun = NULL;
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struct se_session *se_sess = se_cmd->se_sess;
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struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
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unsigned long flags;
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if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
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se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
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se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
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return -ENODEV;
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}
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spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
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se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun];
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deve = se_cmd->se_deve;
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if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
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se_tmr->tmr_lun = deve->se_lun;
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se_cmd->se_lun = deve->se_lun;
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se_lun = deve->se_lun;
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se_cmd->pr_res_key = deve->pr_res_key;
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se_cmd->orig_fe_lun = unpacked_lun;
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}
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spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
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if (!se_lun) {
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pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
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" Access for 0x%08x\n",
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se_cmd->se_tfo->get_fabric_name(),
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unpacked_lun);
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se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
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return -ENODEV;
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}
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/*
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* Determine if the struct se_lun is online.
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* FIXME: Check for LUN_RESET + UNIT Attention
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*/
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if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
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se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
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return -ENODEV;
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}
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/* Directly associate cmd with se_dev */
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se_cmd->se_dev = se_lun->lun_se_dev;
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se_tmr->tmr_dev = se_lun->lun_se_dev;
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spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags);
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list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list);
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spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags);
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return 0;
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}
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EXPORT_SYMBOL(transport_lookup_tmr_lun);
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/*
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* This function is called from core_scsi3_emulate_pro_register_and_move()
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* and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
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* when a matching rtpi is found.
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*/
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struct se_dev_entry *core_get_se_deve_from_rtpi(
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struct se_node_acl *nacl,
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u16 rtpi)
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{
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struct se_dev_entry *deve;
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struct se_lun *lun;
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struct se_port *port;
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struct se_portal_group *tpg = nacl->se_tpg;
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u32 i;
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spin_lock_irq(&nacl->device_list_lock);
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for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
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deve = nacl->device_list[i];
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if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
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continue;
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lun = deve->se_lun;
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if (!lun) {
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pr_err("%s device entries device pointer is"
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" NULL, but Initiator has access.\n",
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tpg->se_tpg_tfo->get_fabric_name());
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continue;
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}
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port = lun->lun_sep;
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if (!port) {
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pr_err("%s device entries device pointer is"
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" NULL, but Initiator has access.\n",
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tpg->se_tpg_tfo->get_fabric_name());
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continue;
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}
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if (port->sep_rtpi != rtpi)
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continue;
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atomic_inc(&deve->pr_ref_count);
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smp_mb__after_atomic_inc();
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spin_unlock_irq(&nacl->device_list_lock);
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return deve;
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}
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spin_unlock_irq(&nacl->device_list_lock);
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return NULL;
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}
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int core_free_device_list_for_node(
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struct se_node_acl *nacl,
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struct se_portal_group *tpg)
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{
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struct se_dev_entry *deve;
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struct se_lun *lun;
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u32 i;
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if (!nacl->device_list)
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return 0;
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spin_lock_irq(&nacl->device_list_lock);
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for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
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deve = nacl->device_list[i];
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if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
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continue;
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if (!deve->se_lun) {
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pr_err("%s device entries device pointer is"
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" NULL, but Initiator has access.\n",
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tpg->se_tpg_tfo->get_fabric_name());
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continue;
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}
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lun = deve->se_lun;
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spin_unlock_irq(&nacl->device_list_lock);
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core_update_device_list_for_node(lun, NULL, deve->mapped_lun,
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TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
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spin_lock_irq(&nacl->device_list_lock);
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}
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spin_unlock_irq(&nacl->device_list_lock);
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array_free(nacl->device_list, TRANSPORT_MAX_LUNS_PER_TPG);
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nacl->device_list = NULL;
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return 0;
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}
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void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd)
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{
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struct se_dev_entry *deve;
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unsigned long flags;
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spin_lock_irqsave(&se_nacl->device_list_lock, flags);
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deve = se_nacl->device_list[se_cmd->orig_fe_lun];
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deve->deve_cmds--;
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spin_unlock_irqrestore(&se_nacl->device_list_lock, flags);
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}
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void core_update_device_list_access(
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u32 mapped_lun,
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u32 lun_access,
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struct se_node_acl *nacl)
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{
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struct se_dev_entry *deve;
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spin_lock_irq(&nacl->device_list_lock);
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deve = nacl->device_list[mapped_lun];
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if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
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deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
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deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
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} else {
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deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
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deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
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}
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spin_unlock_irq(&nacl->device_list_lock);
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}
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/* core_update_device_list_for_node():
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*
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*
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*/
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int core_update_device_list_for_node(
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struct se_lun *lun,
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struct se_lun_acl *lun_acl,
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u32 mapped_lun,
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u32 lun_access,
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struct se_node_acl *nacl,
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struct se_portal_group *tpg,
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int enable)
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{
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struct se_port *port = lun->lun_sep;
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struct se_dev_entry *deve = nacl->device_list[mapped_lun];
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int trans = 0;
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/*
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* If the MappedLUN entry is being disabled, the entry in
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* port->sep_alua_list must be removed now before clearing the
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* struct se_dev_entry pointers below as logic in
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* core_alua_do_transition_tg_pt() depends on these being present.
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*/
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if (!enable) {
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/*
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* deve->se_lun_acl will be NULL for demo-mode created LUNs
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* that have not been explicitly concerted to MappedLUNs ->
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* struct se_lun_acl, but we remove deve->alua_port_list from
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* port->sep_alua_list. This also means that active UAs and
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* NodeACL context specific PR metadata for demo-mode
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* MappedLUN *deve will be released below..
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*/
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spin_lock_bh(&port->sep_alua_lock);
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list_del(&deve->alua_port_list);
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spin_unlock_bh(&port->sep_alua_lock);
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}
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spin_lock_irq(&nacl->device_list_lock);
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if (enable) {
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/*
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* Check if the call is handling demo mode -> explict LUN ACL
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* transition. This transition must be for the same struct se_lun
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* + mapped_lun that was setup in demo mode..
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*/
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if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
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if (deve->se_lun_acl != NULL) {
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pr_err("struct se_dev_entry->se_lun_acl"
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" already set for demo mode -> explict"
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" LUN ACL transition\n");
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spin_unlock_irq(&nacl->device_list_lock);
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return -EINVAL;
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}
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if (deve->se_lun != lun) {
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pr_err("struct se_dev_entry->se_lun does"
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" match passed struct se_lun for demo mode"
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" -> explict LUN ACL transition\n");
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spin_unlock_irq(&nacl->device_list_lock);
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return -EINVAL;
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}
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deve->se_lun_acl = lun_acl;
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trans = 1;
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} else {
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deve->se_lun = lun;
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deve->se_lun_acl = lun_acl;
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deve->mapped_lun = mapped_lun;
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deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
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}
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if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
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deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
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deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
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} else {
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deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
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deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
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}
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if (trans) {
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spin_unlock_irq(&nacl->device_list_lock);
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return 0;
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}
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deve->creation_time = get_jiffies_64();
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deve->attach_count++;
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spin_unlock_irq(&nacl->device_list_lock);
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spin_lock_bh(&port->sep_alua_lock);
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list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
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spin_unlock_bh(&port->sep_alua_lock);
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return 0;
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}
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/*
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* Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
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* PR operation to complete.
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*/
|
|
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_irq(&tpg->acl_node_lock);
|
|
list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
|
|
spin_unlock_irq(&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_irq(&tpg->acl_node_lock);
|
|
}
|
|
spin_unlock_irq(&tpg->acl_node_lock);
|
|
}
|
|
|
|
static 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) {
|
|
pr_err("Unable to allocate struct se_port\n");
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
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) {
|
|
pr_warn("Reached dev->dev_port_count =="
|
|
" 0x0000ffff\n");
|
|
spin_unlock(&dev->se_port_lock);
|
|
return ERR_PTR(-ENOSPC);
|
|
}
|
|
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;
|
|
}
|
|
|
|
static 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 = dev->se_sub_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 (su_dev->t10_alua.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) {
|
|
pr_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,
|
|
su_dev->t10_alua.default_tg_pt_gp);
|
|
spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
|
|
pr_debug("%s/%s: Adding to default ALUA Target Port"
|
|
" Group: alua/default_tg_pt_gp\n",
|
|
dev->transport->name, tpg->se_tpg_tfo->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.
|
|
*/
|
|
static void core_release_port(struct se_device *dev, struct se_port *port)
|
|
__releases(&dev->se_port_lock) __acquires(&dev->se_port_lock)
|
|
{
|
|
/*
|
|
* 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);
|
|
}
|
|
|
|
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 (IS_ERR(port))
|
|
return PTR_ERR(port);
|
|
|
|
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 target_report_luns(struct se_cmd *se_cmd)
|
|
{
|
|
struct se_dev_entry *deve;
|
|
struct se_session *se_sess = se_cmd->se_sess;
|
|
unsigned char *buf;
|
|
u32 lun_count = 0, offset = 8, i;
|
|
|
|
buf = transport_kmap_data_sg(se_cmd);
|
|
if (!buf)
|
|
return -ENOMEM;
|
|
|
|
/*
|
|
* 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) {
|
|
int_to_scsilun(0, (struct scsi_lun *)&buf[offset]);
|
|
lun_count = 1;
|
|
goto done;
|
|
}
|
|
|
|
spin_lock_irq(&se_sess->se_node_acl->device_list_lock);
|
|
for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
|
|
deve = se_sess->se_node_acl->device_list[i];
|
|
if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
|
|
continue;
|
|
/*
|
|
* We determine the correct LUN LIST LENGTH even once we
|
|
* have reached the initial allocation length.
|
|
* See SPC2-R20 7.19.
|
|
*/
|
|
lun_count++;
|
|
if ((offset + 8) > se_cmd->data_length)
|
|
continue;
|
|
|
|
int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]);
|
|
offset += 8;
|
|
}
|
|
spin_unlock_irq(&se_sess->se_node_acl->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);
|
|
transport_kunmap_data_sg(se_cmd);
|
|
|
|
target_complete_cmd(se_cmd, GOOD);
|
|
return 0;
|
|
}
|
|
|
|
/* 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);
|
|
|
|
if (dev->dev_ptr) {
|
|
destroy_workqueue(dev->tmr_wq);
|
|
if (dev->transport->free_device)
|
|
dev->transport->free_device(dev->dev_ptr);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
void se_release_vpd_for_dev(struct se_device *dev)
|
|
{
|
|
struct t10_vpd *vpd, *vpd_tmp;
|
|
|
|
spin_lock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock);
|
|
list_for_each_entry_safe(vpd, vpd_tmp,
|
|
&dev->se_sub_dev->t10_wwn.t10_vpd_list, vpd_list) {
|
|
list_del(&vpd->vpd_list);
|
|
kfree(vpd);
|
|
}
|
|
spin_unlock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock);
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
if (!list_empty(&dev->dev_sep_list))
|
|
dump_stack();
|
|
|
|
core_alua_free_lu_gp_mem(dev);
|
|
se_release_device_for_hba(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static 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);
|
|
}
|
|
|
|
static 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);
|
|
}
|
|
|
|
int se_dev_check_online(struct se_device *dev)
|
|
{
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&dev->dev_status_lock, flags);
|
|
ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
|
|
(dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1;
|
|
spin_unlock_irqrestore(&dev->dev_status_lock, flags);
|
|
|
|
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;
|
|
}
|
|
|
|
u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
|
|
{
|
|
u32 tmp, aligned_max_sectors;
|
|
/*
|
|
* Limit max_sectors to a PAGE_SIZE aligned value for modern
|
|
* transport_allocate_data_tasks() operation.
|
|
*/
|
|
tmp = rounddown((max_sectors * block_size), PAGE_SIZE);
|
|
aligned_max_sectors = (tmp / block_size);
|
|
if (max_sectors != aligned_max_sectors) {
|
|
printk(KERN_INFO "Rounding down aligned max_sectors from %u"
|
|
" to %u\n", max_sectors, aligned_max_sectors);
|
|
return aligned_max_sectors;
|
|
}
|
|
|
|
return max_sectors;
|
|
}
|
|
|
|
void se_dev_set_default_attribs(
|
|
struct se_device *dev,
|
|
struct se_dev_limits *dev_limits)
|
|
{
|
|
struct queue_limits *limits = &dev_limits->limits;
|
|
|
|
dev->se_sub_dev->se_dev_attrib.emulate_dpo = DA_EMULATE_DPO;
|
|
dev->se_sub_dev->se_dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE;
|
|
dev->se_sub_dev->se_dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ;
|
|
dev->se_sub_dev->se_dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
|
|
dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
|
|
dev->se_sub_dev->se_dev_attrib.emulate_tas = DA_EMULATE_TAS;
|
|
dev->se_sub_dev->se_dev_attrib.emulate_tpu = DA_EMULATE_TPU;
|
|
dev->se_sub_dev->se_dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
|
|
dev->se_sub_dev->se_dev_attrib.emulate_reservations = DA_EMULATE_RESERVATIONS;
|
|
dev->se_sub_dev->se_dev_attrib.emulate_alua = DA_EMULATE_ALUA;
|
|
dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
|
|
dev->se_sub_dev->se_dev_attrib.is_nonrot = DA_IS_NONROT;
|
|
dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
|
|
/*
|
|
* 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->se_sub_dev->se_dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
|
|
dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count =
|
|
DA_MAX_UNMAP_BLOCK_DESC_COUNT;
|
|
dev->se_sub_dev->se_dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
|
|
dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment =
|
|
DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
|
|
/*
|
|
* block_size is based on subsystem plugin dependent requirements.
|
|
*/
|
|
dev->se_sub_dev->se_dev_attrib.hw_block_size = limits->logical_block_size;
|
|
dev->se_sub_dev->se_dev_attrib.block_size = limits->logical_block_size;
|
|
/*
|
|
* Align max_hw_sectors down to PAGE_SIZE I/O transfers
|
|
*/
|
|
limits->max_hw_sectors = se_dev_align_max_sectors(limits->max_hw_sectors,
|
|
limits->logical_block_size);
|
|
dev->se_sub_dev->se_dev_attrib.hw_max_sectors = limits->max_hw_sectors;
|
|
|
|
/*
|
|
* Set fabric_max_sectors, which is reported in block limits
|
|
* VPD page (B0h).
|
|
*/
|
|
dev->se_sub_dev->se_dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS;
|
|
/*
|
|
* Set optimal_sectors from fabric_max_sectors, which can be
|
|
* lowered via configfs.
|
|
*/
|
|
dev->se_sub_dev->se_dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS;
|
|
/*
|
|
* queue_depth is based on subsystem plugin dependent requirements.
|
|
*/
|
|
dev->se_sub_dev->se_dev_attrib.hw_queue_depth = dev_limits->hw_queue_depth;
|
|
dev->se_sub_dev->se_dev_attrib.queue_depth = dev_limits->queue_depth;
|
|
}
|
|
|
|
int se_dev_set_max_unmap_lba_count(
|
|
struct se_device *dev,
|
|
u32 max_unmap_lba_count)
|
|
{
|
|
dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = max_unmap_lba_count;
|
|
pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n",
|
|
dev, dev->se_sub_dev->se_dev_attrib.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->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count =
|
|
max_unmap_block_desc_count;
|
|
pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n",
|
|
dev, dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count);
|
|
return 0;
|
|
}
|
|
|
|
int se_dev_set_unmap_granularity(
|
|
struct se_device *dev,
|
|
u32 unmap_granularity)
|
|
{
|
|
dev->se_sub_dev->se_dev_attrib.unmap_granularity = unmap_granularity;
|
|
pr_debug("dev[%p]: Set unmap_granularity: %u\n",
|
|
dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity);
|
|
return 0;
|
|
}
|
|
|
|
int se_dev_set_unmap_granularity_alignment(
|
|
struct se_device *dev,
|
|
u32 unmap_granularity_alignment)
|
|
{
|
|
dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment;
|
|
pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n",
|
|
dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment);
|
|
return 0;
|
|
}
|
|
|
|
int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
|
|
{
|
|
if (flag != 0 && flag != 1) {
|
|
pr_err("Illegal value %d\n", flag);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (flag) {
|
|
pr_err("dpo_emulated not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
|
|
{
|
|
if (flag != 0 && flag != 1) {
|
|
pr_err("Illegal value %d\n", flag);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (flag && dev->transport->fua_write_emulated == 0) {
|
|
pr_err("fua_write_emulated not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
dev->se_sub_dev->se_dev_attrib.emulate_fua_write = flag;
|
|
pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
|
|
dev, dev->se_sub_dev->se_dev_attrib.emulate_fua_write);
|
|
return 0;
|
|
}
|
|
|
|
int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
|
|
{
|
|
if (flag != 0 && flag != 1) {
|
|
pr_err("Illegal value %d\n", flag);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (flag) {
|
|
pr_err("ua read emulated not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
|
|
{
|
|
if (flag != 0 && flag != 1) {
|
|
pr_err("Illegal value %d\n", flag);
|
|
return -EINVAL;
|
|
}
|
|
if (flag && dev->transport->write_cache_emulated == 0) {
|
|
pr_err("write_cache_emulated not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
dev->se_sub_dev->se_dev_attrib.emulate_write_cache = flag;
|
|
pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
|
|
dev, dev->se_sub_dev->se_dev_attrib.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)) {
|
|
pr_err("Illegal value %d\n", flag);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
|
|
pr_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 -EINVAL;
|
|
}
|
|
dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = flag;
|
|
pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
|
|
dev, dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int se_dev_set_emulate_tas(struct se_device *dev, int flag)
|
|
{
|
|
if ((flag != 0) && (flag != 1)) {
|
|
pr_err("Illegal value %d\n", flag);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
|
|
pr_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 -EINVAL;
|
|
}
|
|
dev->se_sub_dev->se_dev_attrib.emulate_tas = flag;
|
|
pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
|
|
dev, (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? "Enabled" : "Disabled");
|
|
|
|
return 0;
|
|
}
|
|
|
|
int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
|
|
{
|
|
if ((flag != 0) && (flag != 1)) {
|
|
pr_err("Illegal value %d\n", flag);
|
|
return -EINVAL;
|
|
}
|
|
/*
|
|
* We expect this value to be non-zero when generic Block Layer
|
|
* Discard supported is detected iblock_create_virtdevice().
|
|
*/
|
|
if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
|
|
pr_err("Generic Block Discard not supported\n");
|
|
return -ENOSYS;
|
|
}
|
|
|
|
dev->se_sub_dev->se_dev_attrib.emulate_tpu = flag;
|
|
pr_debug("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)) {
|
|
pr_err("Illegal value %d\n", flag);
|
|
return -EINVAL;
|
|
}
|
|
/*
|
|
* We expect this value to be non-zero when generic Block Layer
|
|
* Discard supported is detected iblock_create_virtdevice().
|
|
*/
|
|
if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
|
|
pr_err("Generic Block Discard not supported\n");
|
|
return -ENOSYS;
|
|
}
|
|
|
|
dev->se_sub_dev->se_dev_attrib.emulate_tpws = flag;
|
|
pr_debug("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)) {
|
|
pr_err("Illegal value %d\n", flag);
|
|
return -EINVAL;
|
|
}
|
|
dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = flag;
|
|
pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
|
|
(dev->se_sub_dev->se_dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled");
|
|
return 0;
|
|
}
|
|
|
|
int se_dev_set_is_nonrot(struct se_device *dev, int flag)
|
|
{
|
|
if ((flag != 0) && (flag != 1)) {
|
|
printk(KERN_ERR "Illegal value %d\n", flag);
|
|
return -EINVAL;
|
|
}
|
|
dev->se_sub_dev->se_dev_attrib.is_nonrot = flag;
|
|
pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n",
|
|
dev, flag);
|
|
return 0;
|
|
}
|
|
|
|
int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag)
|
|
{
|
|
if (flag != 0) {
|
|
printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted"
|
|
" reordering not implemented\n", dev);
|
|
return -ENOSYS;
|
|
}
|
|
dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = flag;
|
|
pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag);
|
|
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)
|
|
{
|
|
if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
|
|
pr_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 -EINVAL;
|
|
}
|
|
if (!queue_depth) {
|
|
pr_err("dev[%p]: Illegal ZERO value for queue"
|
|
"_depth\n", dev);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
|
|
if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) {
|
|
pr_err("dev[%p]: Passed queue_depth: %u"
|
|
" exceeds TCM/SE_Device TCQ: %u\n",
|
|
dev, queue_depth,
|
|
dev->se_sub_dev->se_dev_attrib.hw_queue_depth);
|
|
return -EINVAL;
|
|
}
|
|
} else {
|
|
if (queue_depth > dev->se_sub_dev->se_dev_attrib.queue_depth) {
|
|
if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) {
|
|
pr_err("dev[%p]: Passed queue_depth:"
|
|
" %u exceeds TCM/SE_Device MAX"
|
|
" TCQ: %u\n", dev, queue_depth,
|
|
dev->se_sub_dev->se_dev_attrib.hw_queue_depth);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
}
|
|
|
|
dev->se_sub_dev->se_dev_attrib.queue_depth = dev->queue_depth = queue_depth;
|
|
pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n",
|
|
dev, queue_depth);
|
|
return 0;
|
|
}
|
|
|
|
int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors)
|
|
{
|
|
if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
|
|
pr_err("dev[%p]: Unable to change SE Device"
|
|
" fabric_max_sectors while dev_export_obj: %d count exists\n",
|
|
dev, atomic_read(&dev->dev_export_obj.obj_access_count));
|
|
return -EINVAL;
|
|
}
|
|
if (!fabric_max_sectors) {
|
|
pr_err("dev[%p]: Illegal ZERO value for"
|
|
" fabric_max_sectors\n", dev);
|
|
return -EINVAL;
|
|
}
|
|
if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
|
|
pr_err("dev[%p]: Passed fabric_max_sectors: %u less than"
|
|
" DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors,
|
|
DA_STATUS_MAX_SECTORS_MIN);
|
|
return -EINVAL;
|
|
}
|
|
if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
|
|
if (fabric_max_sectors > dev->se_sub_dev->se_dev_attrib.hw_max_sectors) {
|
|
pr_err("dev[%p]: Passed fabric_max_sectors: %u"
|
|
" greater than TCM/SE_Device max_sectors:"
|
|
" %u\n", dev, fabric_max_sectors,
|
|
dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
|
|
return -EINVAL;
|
|
}
|
|
} else {
|
|
if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
|
|
pr_err("dev[%p]: Passed fabric_max_sectors: %u"
|
|
" greater than DA_STATUS_MAX_SECTORS_MAX:"
|
|
" %u\n", dev, fabric_max_sectors,
|
|
DA_STATUS_MAX_SECTORS_MAX);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
/*
|
|
* Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
|
|
*/
|
|
fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors,
|
|
dev->se_sub_dev->se_dev_attrib.block_size);
|
|
|
|
dev->se_sub_dev->se_dev_attrib.fabric_max_sectors = fabric_max_sectors;
|
|
pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
|
|
dev, fabric_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)) {
|
|
pr_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 (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
|
|
pr_err("dev[%p]: Passed optimal_sectors cannot be"
|
|
" changed for TCM/pSCSI\n", dev);
|
|
return -EINVAL;
|
|
}
|
|
if (optimal_sectors > dev->se_sub_dev->se_dev_attrib.fabric_max_sectors) {
|
|
pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
|
|
" greater than fabric_max_sectors: %u\n", dev,
|
|
optimal_sectors, dev->se_sub_dev->se_dev_attrib.fabric_max_sectors);
|
|
return -EINVAL;
|
|
}
|
|
|
|
dev->se_sub_dev->se_dev_attrib.optimal_sectors = optimal_sectors;
|
|
pr_debug("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)) {
|
|
pr_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 -EINVAL;
|
|
}
|
|
|
|
if ((block_size != 512) &&
|
|
(block_size != 1024) &&
|
|
(block_size != 2048) &&
|
|
(block_size != 4096)) {
|
|
pr_err("dev[%p]: Illegal value for block_device: %u"
|
|
" for SE device, must be 512, 1024, 2048 or 4096\n",
|
|
dev, block_size);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
|
|
pr_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 -EINVAL;
|
|
}
|
|
|
|
dev->se_sub_dev->se_dev_attrib.block_size = block_size;
|
|
pr_debug("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;
|
|
int rc;
|
|
|
|
if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) {
|
|
pr_err("Unable to export struct se_device while dev_access_obj: %d\n",
|
|
atomic_read(&dev->dev_access_obj.obj_access_count));
|
|
return ERR_PTR(-EACCES);
|
|
}
|
|
|
|
lun_p = core_tpg_pre_addlun(tpg, lun);
|
|
if (IS_ERR(lun_p))
|
|
return lun_p;
|
|
|
|
rc = core_tpg_post_addlun(tpg, lun_p,
|
|
TRANSPORT_LUNFLAGS_READ_WRITE, dev);
|
|
if (rc < 0)
|
|
return ERR_PTR(rc);
|
|
|
|
pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
|
|
" CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
|
|
tpg->se_tpg_tfo->tpg_get_tag(tpg), lun_p->unpacked_lun,
|
|
tpg->se_tpg_tfo->get_fabric_name(), hba->hba_id);
|
|
/*
|
|
* Update LUN maps for dynamically added initiators when
|
|
* generate_node_acl is enabled.
|
|
*/
|
|
if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
|
|
struct se_node_acl *acl;
|
|
spin_lock_irq(&tpg->acl_node_lock);
|
|
list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
|
|
if (acl->dynamic_node_acl &&
|
|
(!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
|
|
!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
|
|
spin_unlock_irq(&tpg->acl_node_lock);
|
|
core_tpg_add_node_to_devs(acl, tpg);
|
|
spin_lock_irq(&tpg->acl_node_lock);
|
|
}
|
|
}
|
|
spin_unlock_irq(&tpg->acl_node_lock);
|
|
}
|
|
|
|
return lun_p;
|
|
}
|
|
|
|
/* core_dev_del_lun():
|
|
*
|
|
*
|
|
*/
|
|
int core_dev_del_lun(
|
|
struct se_portal_group *tpg,
|
|
u32 unpacked_lun)
|
|
{
|
|
struct se_lun *lun;
|
|
|
|
lun = core_tpg_pre_dellun(tpg, unpacked_lun);
|
|
if (IS_ERR(lun))
|
|
return PTR_ERR(lun);
|
|
|
|
core_tpg_post_dellun(tpg, lun);
|
|
|
|
pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
|
|
" device object\n", tpg->se_tpg_tfo->get_fabric_name(),
|
|
tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun,
|
|
tpg->se_tpg_tfo->get_fabric_name());
|
|
|
|
return 0;
|
|
}
|
|
|
|
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)) {
|
|
pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
|
|
"_PER_TPG-1: %u for Target Portal Group: %hu\n",
|
|
tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
|
|
TRANSPORT_MAX_LUNS_PER_TPG-1,
|
|
tpg->se_tpg_tfo->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) {
|
|
pr_err("%s Logical Unit Number: %u is not free on"
|
|
" Target Portal Group: %hu, ignoring request.\n",
|
|
tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
|
|
tpg->se_tpg_tfo->tpg_get_tag(tpg));
|
|
spin_unlock(&tpg->tpg_lun_lock);
|
|
return NULL;
|
|
}
|
|
spin_unlock(&tpg->tpg_lun_lock);
|
|
|
|
return lun;
|
|
}
|
|
|
|
/* 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)) {
|
|
pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
|
|
"_TPG-1: %u for Target Portal Group: %hu\n",
|
|
tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
|
|
TRANSPORT_MAX_LUNS_PER_TPG-1,
|
|
tpg->se_tpg_tfo->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) {
|
|
pr_err("%s Logical Unit Number: %u is not active on"
|
|
" Target Portal Group: %hu, ignoring request.\n",
|
|
tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
|
|
tpg->se_tpg_tfo->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) {
|
|
pr_err("%s InitiatorName exceeds maximum size.\n",
|
|
tpg->se_tpg_tfo->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) {
|
|
pr_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;
|
|
}
|
|
|
|
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) {
|
|
pr_err("%s Logical Unit Number: %u is not active on"
|
|
" Target Portal Group: %hu, ignoring request.\n",
|
|
tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
|
|
tpg->se_tpg_tfo->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);
|
|
|
|
pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
|
|
" InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
|
|
tpg->se_tpg_tfo->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;
|
|
}
|
|
|
|
/* 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;
|
|
|
|
pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for"
|
|
" InitiatorNode: %s Mapped LUN: %u\n",
|
|
tpg->se_tpg_tfo->get_fabric_name(),
|
|
tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
|
|
lacl->initiatorname, lacl->mapped_lun);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void core_dev_free_initiator_node_lun_acl(
|
|
struct se_portal_group *tpg,
|
|
struct se_lun_acl *lacl)
|
|
{
|
|
pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
|
|
" Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
|
|
tpg->se_tpg_tfo->tpg_get_tag(tpg),
|
|
tpg->se_tpg_tfo->get_fabric_name(),
|
|
lacl->initiatorname, lacl->mapped_lun);
|
|
|
|
kfree(lacl);
|
|
}
|
|
|
|
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("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
|
|
if (IS_ERR(hba))
|
|
return PTR_ERR(hba);
|
|
|
|
lun0_hba = hba;
|
|
t = hba->transport;
|
|
|
|
se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
|
|
if (!se_dev) {
|
|
pr_err("Unable to allocate memory for"
|
|
" struct se_subsystem_dev\n");
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
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_pr.registration_list);
|
|
INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
|
|
spin_lock_init(&se_dev->t10_pr.registration_lock);
|
|
spin_lock_init(&se_dev->t10_pr.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_pr.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) {
|
|
pr_err("Unable to locate subsystem dependent pointer"
|
|
" from allocate_virtdevice()\n");
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
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 (IS_ERR(dev)) {
|
|
ret = PTR_ERR(dev);
|
|
goto out;
|
|
}
|
|
se_dev->se_dev_ptr = dev;
|
|
g_lun0_dev = dev;
|
|
|
|
return 0;
|
|
out:
|
|
lun0_su_dev = NULL;
|
|
kfree(se_dev);
|
|
if (lun0_hba) {
|
|
core_delete_hba(lun0_hba);
|
|
lun0_hba = NULL;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
void core_dev_release_virtual_lun0(void)
|
|
{
|
|
struct se_hba *hba = lun0_hba;
|
|
struct se_subsystem_dev *su_dev = lun0_su_dev;
|
|
|
|
if (!hba)
|
|
return;
|
|
|
|
if (g_lun0_dev)
|
|
se_free_virtual_device(g_lun0_dev, hba);
|
|
|
|
kfree(su_dev);
|
|
core_delete_hba(hba);
|
|
}
|