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![Linus Torvalds](/assets/img/avatar_default.png)
Pull core locking updates from Ingo Molnar: "The main changes in this cycle were: - reduced/streamlined smp_mb__*() interface that allows more usecases and makes the existing ones less buggy, especially in rarer architectures - add rwsem implementation comments - bump up lockdep limits" * 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (33 commits) rwsem: Add comments to explain the meaning of the rwsem's count field lockdep: Increase static allocations arch: Mass conversion of smp_mb__*() arch,doc: Convert smp_mb__*() arch,xtensa: Convert smp_mb__*() arch,x86: Convert smp_mb__*() arch,tile: Convert smp_mb__*() arch,sparc: Convert smp_mb__*() arch,sh: Convert smp_mb__*() arch,score: Convert smp_mb__*() arch,s390: Convert smp_mb__*() arch,powerpc: Convert smp_mb__*() arch,parisc: Convert smp_mb__*() arch,openrisc: Convert smp_mb__*() arch,mn10300: Convert smp_mb__*() arch,mips: Convert smp_mb__*() arch,metag: Convert smp_mb__*() arch,m68k: Convert smp_mb__*() arch,m32r: Convert smp_mb__*() arch,ia64: Convert smp_mb__*() ...
1738 lines
46 KiB
C
1738 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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* (c) Copyright 2003-2013 Datera, Inc.
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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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DEFINE_MUTEX(g_device_mutex);
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LIST_HEAD(g_device_list);
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static struct se_hba *lun0_hba;
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/* not static, needed by tpg.c */
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struct se_device *g_lun0_dev;
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sense_reason_t
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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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return TCM_NON_EXISTENT_LUN;
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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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if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
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(deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
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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 TCM_WRITE_PROTECTED;
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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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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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percpu_ref_get(&se_lun->lun_ref);
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se_cmd->lun_ref_active = true;
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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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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 TCM_NON_EXISTENT_LUN;
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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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return TCM_WRITE_PROTECTED;
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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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percpu_ref_get(&se_lun->lun_ref);
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se_cmd->lun_ref_active = true;
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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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dev = se_lun->lun_se_dev;
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atomic_long_inc(&dev->num_cmds);
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if (se_cmd->data_direction == DMA_TO_DEVICE)
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atomic_long_add(se_cmd->data_length, &dev->write_bytes);
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else if (se_cmd->data_direction == DMA_FROM_DEVICE)
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atomic_long_add(se_cmd->data_length, &dev->read_bytes);
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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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return -ENODEV;
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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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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();
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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_disable_device_list_for_node(lun, NULL, deve->mapped_lun,
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TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
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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_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_enable_device_list_for_node():
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*
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*
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*/
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int core_enable_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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{
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struct se_port *port = lun->lun_sep;
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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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/*
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* Check if the call is handling demo mode -> explicit 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 -> explicit"
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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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" -> explicit 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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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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return 0;
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}
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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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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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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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/* core_disable_device_list_for_node():
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*
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*
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*/
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int core_disable_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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{
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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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/*
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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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* deve->se_lun_acl will be NULL for demo-mode created LUNs
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* that have not been explicitly converted 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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* 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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*/
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while (atomic_read(&deve->pr_ref_count) != 0)
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cpu_relax();
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spin_lock_irq(&nacl->device_list_lock);
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/*
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* Disable struct se_dev_entry LUN ACL mapping
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*/
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core_scsi3_ua_release_all(deve);
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deve->se_lun = NULL;
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deve->se_lun_acl = NULL;
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deve->lun_flags = 0;
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deve->creation_time = 0;
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deve->attach_count--;
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spin_unlock_irq(&nacl->device_list_lock);
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core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
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return 0;
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}
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/* core_clear_lun_from_tpg():
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*
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*
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*/
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void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
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{
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struct se_node_acl *nacl;
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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_disable_device_list_for_node(lun, NULL,
|
|
deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
|
|
nacl, tpg);
|
|
|
|
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 IDENTIFIER 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 IDENTIFIER 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 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 (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV &&
|
|
!(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) {
|
|
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,
|
|
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 IDENTIFIER */
|
|
}
|
|
|
|
/*
|
|
* 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_hba *hba = dev->se_hba;
|
|
struct se_port *port;
|
|
|
|
port = core_alloc_port(dev);
|
|
if (IS_ERR(port))
|
|
return PTR_ERR(port);
|
|
|
|
lun->lun_se_dev = dev;
|
|
|
|
spin_lock(&hba->device_lock);
|
|
dev->export_count++;
|
|
spin_unlock(&hba->device_lock);
|
|
|
|
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_hba *hba = dev->se_hba;
|
|
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);
|
|
core_release_port(dev, port);
|
|
spin_unlock(&dev->se_port_lock);
|
|
|
|
spin_lock(&hba->device_lock);
|
|
dev->export_count--;
|
|
spin_unlock(&hba->device_lock);
|
|
|
|
lun->lun_se_dev = NULL;
|
|
}
|
|
|
|
static void se_release_vpd_for_dev(struct se_device *dev)
|
|
{
|
|
struct t10_vpd *vpd, *vpd_tmp;
|
|
|
|
spin_lock(&dev->t10_wwn.t10_vpd_lock);
|
|
list_for_each_entry_safe(vpd, vpd_tmp,
|
|
&dev->t10_wwn.t10_vpd_list, vpd_list) {
|
|
list_del(&vpd->vpd_list);
|
|
kfree(vpd);
|
|
}
|
|
spin_unlock(&dev->t10_wwn.t10_vpd_lock);
|
|
}
|
|
|
|
static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
|
|
{
|
|
u32 aligned_max_sectors;
|
|
u32 alignment;
|
|
/*
|
|
* Limit max_sectors to a PAGE_SIZE aligned value for modern
|
|
* transport_allocate_data_tasks() operation.
|
|
*/
|
|
alignment = max(1ul, PAGE_SIZE / block_size);
|
|
aligned_max_sectors = rounddown(max_sectors, alignment);
|
|
|
|
if (max_sectors != aligned_max_sectors)
|
|
pr_info("Rounding down aligned max_sectors from %u to %u\n",
|
|
max_sectors, aligned_max_sectors);
|
|
|
|
return aligned_max_sectors;
|
|
}
|
|
|
|
int se_dev_set_max_unmap_lba_count(
|
|
struct se_device *dev,
|
|
u32 max_unmap_lba_count)
|
|
{
|
|
dev->dev_attrib.max_unmap_lba_count = max_unmap_lba_count;
|
|
pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n",
|
|
dev, dev->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->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->dev_attrib.max_unmap_block_desc_count);
|
|
return 0;
|
|
}
|
|
|
|
int se_dev_set_unmap_granularity(
|
|
struct se_device *dev,
|
|
u32 unmap_granularity)
|
|
{
|
|
dev->dev_attrib.unmap_granularity = unmap_granularity;
|
|
pr_debug("dev[%p]: Set unmap_granularity: %u\n",
|
|
dev, dev->dev_attrib.unmap_granularity);
|
|
return 0;
|
|
}
|
|
|
|
int se_dev_set_unmap_granularity_alignment(
|
|
struct se_device *dev,
|
|
u32 unmap_granularity_alignment)
|
|
{
|
|
dev->dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment;
|
|
pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n",
|
|
dev, dev->dev_attrib.unmap_granularity_alignment);
|
|
return 0;
|
|
}
|
|
|
|
int se_dev_set_max_write_same_len(
|
|
struct se_device *dev,
|
|
u32 max_write_same_len)
|
|
{
|
|
dev->dev_attrib.max_write_same_len = max_write_same_len;
|
|
pr_debug("dev[%p]: Set max_write_same_len: %u\n",
|
|
dev, dev->dev_attrib.max_write_same_len);
|
|
return 0;
|
|
}
|
|
|
|
static void dev_set_t10_wwn_model_alias(struct se_device *dev)
|
|
{
|
|
const char *configname;
|
|
|
|
configname = config_item_name(&dev->dev_group.cg_item);
|
|
if (strlen(configname) >= 16) {
|
|
pr_warn("dev[%p]: Backstore name '%s' is too long for "
|
|
"INQUIRY_MODEL, truncating to 16 bytes\n", dev,
|
|
configname);
|
|
}
|
|
snprintf(&dev->t10_wwn.model[0], 16, "%s", configname);
|
|
}
|
|
|
|
int se_dev_set_emulate_model_alias(struct se_device *dev, int flag)
|
|
{
|
|
if (dev->export_count) {
|
|
pr_err("dev[%p]: Unable to change model alias"
|
|
" while export_count is %d\n",
|
|
dev, dev->export_count);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (flag != 0 && flag != 1) {
|
|
pr_err("Illegal value %d\n", flag);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (flag) {
|
|
dev_set_t10_wwn_model_alias(dev);
|
|
} else {
|
|
strncpy(&dev->t10_wwn.model[0],
|
|
dev->transport->inquiry_prod, 16);
|
|
}
|
|
dev->dev_attrib.emulate_model_alias = flag;
|
|
|
|
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->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
|
|
pr_err("emulate_fua_write not supported for pSCSI\n");
|
|
return -EINVAL;
|
|
}
|
|
dev->dev_attrib.emulate_fua_write = flag;
|
|
pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
|
|
dev, dev->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->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
|
|
pr_err("emulate_write_cache not supported for pSCSI\n");
|
|
return -EINVAL;
|
|
}
|
|
if (flag &&
|
|
dev->transport->get_write_cache) {
|
|
pr_err("emulate_write_cache not supported for this device\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
dev->dev_attrib.emulate_write_cache = flag;
|
|
pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
|
|
dev, dev->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 (dev->export_count) {
|
|
pr_err("dev[%p]: Unable to change SE Device"
|
|
" UA_INTRLCK_CTRL while export_count is %d\n",
|
|
dev, dev->export_count);
|
|
return -EINVAL;
|
|
}
|
|
dev->dev_attrib.emulate_ua_intlck_ctrl = flag;
|
|
pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
|
|
dev, dev->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 (dev->export_count) {
|
|
pr_err("dev[%p]: Unable to change SE Device TAS while"
|
|
" export_count is %d\n",
|
|
dev, dev->export_count);
|
|
return -EINVAL;
|
|
}
|
|
dev->dev_attrib.emulate_tas = flag;
|
|
pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
|
|
dev, (dev->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->dev_attrib.max_unmap_block_desc_count) {
|
|
pr_err("Generic Block Discard not supported\n");
|
|
return -ENOSYS;
|
|
}
|
|
|
|
dev->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->dev_attrib.max_unmap_block_desc_count) {
|
|
pr_err("Generic Block Discard not supported\n");
|
|
return -ENOSYS;
|
|
}
|
|
|
|
dev->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_emulate_caw(struct se_device *dev, int flag)
|
|
{
|
|
if (flag != 0 && flag != 1) {
|
|
pr_err("Illegal value %d\n", flag);
|
|
return -EINVAL;
|
|
}
|
|
dev->dev_attrib.emulate_caw = flag;
|
|
pr_debug("dev[%p]: SE Device CompareAndWrite (AtomicTestandSet): %d\n",
|
|
dev, flag);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int se_dev_set_emulate_3pc(struct se_device *dev, int flag)
|
|
{
|
|
if (flag != 0 && flag != 1) {
|
|
pr_err("Illegal value %d\n", flag);
|
|
return -EINVAL;
|
|
}
|
|
dev->dev_attrib.emulate_3pc = flag;
|
|
pr_debug("dev[%p]: SE Device 3rd Party Copy (EXTENDED_COPY): %d\n",
|
|
dev, flag);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int se_dev_set_pi_prot_type(struct se_device *dev, int flag)
|
|
{
|
|
int rc, old_prot = dev->dev_attrib.pi_prot_type;
|
|
|
|
if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
|
|
pr_err("Illegal value %d for pi_prot_type\n", flag);
|
|
return -EINVAL;
|
|
}
|
|
if (flag == 2) {
|
|
pr_err("DIF TYPE2 protection currently not supported\n");
|
|
return -ENOSYS;
|
|
}
|
|
if (dev->dev_attrib.hw_pi_prot_type) {
|
|
pr_warn("DIF protection enabled on underlying hardware,"
|
|
" ignoring\n");
|
|
return 0;
|
|
}
|
|
if (!dev->transport->init_prot || !dev->transport->free_prot) {
|
|
/* 0 is only allowed value for non-supporting backends */
|
|
if (flag == 0)
|
|
return 0;
|
|
|
|
pr_err("DIF protection not supported by backend: %s\n",
|
|
dev->transport->name);
|
|
return -ENOSYS;
|
|
}
|
|
if (!(dev->dev_flags & DF_CONFIGURED)) {
|
|
pr_err("DIF protection requires device to be configured\n");
|
|
return -ENODEV;
|
|
}
|
|
if (dev->export_count) {
|
|
pr_err("dev[%p]: Unable to change SE Device PROT type while"
|
|
" export_count is %d\n", dev, dev->export_count);
|
|
return -EINVAL;
|
|
}
|
|
|
|
dev->dev_attrib.pi_prot_type = flag;
|
|
|
|
if (flag && !old_prot) {
|
|
rc = dev->transport->init_prot(dev);
|
|
if (rc) {
|
|
dev->dev_attrib.pi_prot_type = old_prot;
|
|
return rc;
|
|
}
|
|
|
|
} else if (!flag && old_prot) {
|
|
dev->transport->free_prot(dev);
|
|
}
|
|
pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int se_dev_set_pi_prot_format(struct se_device *dev, int flag)
|
|
{
|
|
int rc;
|
|
|
|
if (!flag)
|
|
return 0;
|
|
|
|
if (flag != 1) {
|
|
pr_err("Illegal value %d for pi_prot_format\n", flag);
|
|
return -EINVAL;
|
|
}
|
|
if (!dev->transport->format_prot) {
|
|
pr_err("DIF protection format not supported by backend %s\n",
|
|
dev->transport->name);
|
|
return -ENOSYS;
|
|
}
|
|
if (!(dev->dev_flags & DF_CONFIGURED)) {
|
|
pr_err("DIF protection format requires device to be configured\n");
|
|
return -ENODEV;
|
|
}
|
|
if (dev->export_count) {
|
|
pr_err("dev[%p]: Unable to format SE Device PROT type while"
|
|
" export_count is %d\n", dev, dev->export_count);
|
|
return -EINVAL;
|
|
}
|
|
|
|
rc = dev->transport->format_prot(dev);
|
|
if (rc)
|
|
return rc;
|
|
|
|
pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
|
|
|
|
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->dev_attrib.enforce_pr_isids = flag;
|
|
pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
|
|
(dev->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->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->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 (dev->export_count) {
|
|
pr_err("dev[%p]: Unable to change SE Device TCQ while"
|
|
" export_count is %d\n",
|
|
dev, dev->export_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->dev_attrib.hw_queue_depth) {
|
|
pr_err("dev[%p]: Passed queue_depth: %u"
|
|
" exceeds TCM/SE_Device TCQ: %u\n",
|
|
dev, queue_depth,
|
|
dev->dev_attrib.hw_queue_depth);
|
|
return -EINVAL;
|
|
}
|
|
} else {
|
|
if (queue_depth > dev->dev_attrib.queue_depth) {
|
|
if (queue_depth > dev->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->dev_attrib.hw_queue_depth);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
}
|
|
|
|
dev->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)
|
|
{
|
|
int block_size = dev->dev_attrib.block_size;
|
|
|
|
if (dev->export_count) {
|
|
pr_err("dev[%p]: Unable to change SE Device"
|
|
" fabric_max_sectors while export_count is %d\n",
|
|
dev, dev->export_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->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->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()
|
|
*/
|
|
if (!block_size) {
|
|
block_size = 512;
|
|
pr_warn("Defaulting to 512 for zero block_size\n");
|
|
}
|
|
fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors,
|
|
block_size);
|
|
|
|
dev->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 (dev->export_count) {
|
|
pr_err("dev[%p]: Unable to change SE Device"
|
|
" optimal_sectors while export_count is %d\n",
|
|
dev, dev->export_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->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->dev_attrib.fabric_max_sectors);
|
|
return -EINVAL;
|
|
}
|
|
|
|
dev->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 (dev->export_count) {
|
|
pr_err("dev[%p]: Unable to change SE Device block_size"
|
|
" while export_count is %d\n",
|
|
dev, dev->export_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->dev_attrib.block_size = block_size;
|
|
pr_debug("dev[%p]: SE Device block_size changed to %u\n",
|
|
dev, block_size);
|
|
|
|
if (dev->dev_attrib.max_bytes_per_io)
|
|
dev->dev_attrib.hw_max_sectors =
|
|
dev->dev_attrib.max_bytes_per_io / block_size;
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct se_lun *core_dev_add_lun(
|
|
struct se_portal_group *tpg,
|
|
struct se_device *dev,
|
|
u32 unpacked_lun)
|
|
{
|
|
struct se_lun *lun;
|
|
int rc;
|
|
|
|
lun = core_tpg_alloc_lun(tpg, unpacked_lun);
|
|
if (IS_ERR(lun))
|
|
return lun;
|
|
|
|
rc = core_tpg_add_lun(tpg, lun,
|
|
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->unpacked_lun,
|
|
tpg->se_tpg_tfo->get_fabric_name(), dev->se_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;
|
|
}
|
|
|
|
/* 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,
|
|
struct se_node_acl *nacl,
|
|
u32 mapped_lun,
|
|
int *ret)
|
|
{
|
|
struct se_lun_acl *lacl;
|
|
|
|
if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) {
|
|
pr_err("%s InitiatorName exceeds maximum size.\n",
|
|
tpg->se_tpg_tfo->get_fabric_name());
|
|
*ret = -EOVERFLOW;
|
|
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",
|
|
nacl->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_enable_device_list_for_node(lun, lacl, lacl->mapped_lun,
|
|
lun_access, nacl, tpg) < 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();
|
|
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();
|
|
spin_unlock(&lun->lun_acl_lock);
|
|
|
|
core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun,
|
|
TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
|
|
|
|
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);
|
|
}
|
|
|
|
static void scsi_dump_inquiry(struct se_device *dev)
|
|
{
|
|
struct t10_wwn *wwn = &dev->t10_wwn;
|
|
char buf[17];
|
|
int i, device_type;
|
|
/*
|
|
* Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer
|
|
*/
|
|
for (i = 0; i < 8; i++)
|
|
if (wwn->vendor[i] >= 0x20)
|
|
buf[i] = wwn->vendor[i];
|
|
else
|
|
buf[i] = ' ';
|
|
buf[i] = '\0';
|
|
pr_debug(" Vendor: %s\n", buf);
|
|
|
|
for (i = 0; i < 16; i++)
|
|
if (wwn->model[i] >= 0x20)
|
|
buf[i] = wwn->model[i];
|
|
else
|
|
buf[i] = ' ';
|
|
buf[i] = '\0';
|
|
pr_debug(" Model: %s\n", buf);
|
|
|
|
for (i = 0; i < 4; i++)
|
|
if (wwn->revision[i] >= 0x20)
|
|
buf[i] = wwn->revision[i];
|
|
else
|
|
buf[i] = ' ';
|
|
buf[i] = '\0';
|
|
pr_debug(" Revision: %s\n", buf);
|
|
|
|
device_type = dev->transport->get_device_type(dev);
|
|
pr_debug(" Type: %s ", scsi_device_type(device_type));
|
|
}
|
|
|
|
struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
|
|
{
|
|
struct se_device *dev;
|
|
struct se_lun *xcopy_lun;
|
|
|
|
dev = hba->transport->alloc_device(hba, name);
|
|
if (!dev)
|
|
return NULL;
|
|
|
|
dev->dev_link_magic = SE_DEV_LINK_MAGIC;
|
|
dev->se_hba = hba;
|
|
dev->transport = hba->transport;
|
|
dev->prot_length = sizeof(struct se_dif_v1_tuple);
|
|
|
|
INIT_LIST_HEAD(&dev->dev_list);
|
|
INIT_LIST_HEAD(&dev->dev_sep_list);
|
|
INIT_LIST_HEAD(&dev->dev_tmr_list);
|
|
INIT_LIST_HEAD(&dev->delayed_cmd_list);
|
|
INIT_LIST_HEAD(&dev->state_list);
|
|
INIT_LIST_HEAD(&dev->qf_cmd_list);
|
|
INIT_LIST_HEAD(&dev->g_dev_node);
|
|
spin_lock_init(&dev->execute_task_lock);
|
|
spin_lock_init(&dev->delayed_cmd_lock);
|
|
spin_lock_init(&dev->dev_reservation_lock);
|
|
spin_lock_init(&dev->se_port_lock);
|
|
spin_lock_init(&dev->se_tmr_lock);
|
|
spin_lock_init(&dev->qf_cmd_lock);
|
|
sema_init(&dev->caw_sem, 1);
|
|
atomic_set(&dev->dev_ordered_id, 0);
|
|
INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list);
|
|
spin_lock_init(&dev->t10_wwn.t10_vpd_lock);
|
|
INIT_LIST_HEAD(&dev->t10_pr.registration_list);
|
|
INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list);
|
|
spin_lock_init(&dev->t10_pr.registration_lock);
|
|
spin_lock_init(&dev->t10_pr.aptpl_reg_lock);
|
|
INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list);
|
|
spin_lock_init(&dev->t10_alua.tg_pt_gps_lock);
|
|
INIT_LIST_HEAD(&dev->t10_alua.lba_map_list);
|
|
spin_lock_init(&dev->t10_alua.lba_map_lock);
|
|
|
|
dev->t10_wwn.t10_dev = dev;
|
|
dev->t10_alua.t10_dev = dev;
|
|
|
|
dev->dev_attrib.da_dev = dev;
|
|
dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS;
|
|
dev->dev_attrib.emulate_dpo = DA_EMULATE_DPO;
|
|
dev->dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE;
|
|
dev->dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ;
|
|
dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
|
|
dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
|
|
dev->dev_attrib.emulate_tas = DA_EMULATE_TAS;
|
|
dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU;
|
|
dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
|
|
dev->dev_attrib.emulate_caw = DA_EMULATE_CAW;
|
|
dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC;
|
|
dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT;
|
|
dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
|
|
dev->dev_attrib.is_nonrot = DA_IS_NONROT;
|
|
dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
|
|
dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
|
|
dev->dev_attrib.max_unmap_block_desc_count =
|
|
DA_MAX_UNMAP_BLOCK_DESC_COUNT;
|
|
dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
|
|
dev->dev_attrib.unmap_granularity_alignment =
|
|
DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
|
|
dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN;
|
|
dev->dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS;
|
|
dev->dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS;
|
|
|
|
xcopy_lun = &dev->xcopy_lun;
|
|
xcopy_lun->lun_se_dev = dev;
|
|
init_completion(&xcopy_lun->lun_shutdown_comp);
|
|
INIT_LIST_HEAD(&xcopy_lun->lun_acl_list);
|
|
spin_lock_init(&xcopy_lun->lun_acl_lock);
|
|
spin_lock_init(&xcopy_lun->lun_sep_lock);
|
|
init_completion(&xcopy_lun->lun_ref_comp);
|
|
|
|
return dev;
|
|
}
|
|
|
|
int target_configure_device(struct se_device *dev)
|
|
{
|
|
struct se_hba *hba = dev->se_hba;
|
|
int ret;
|
|
|
|
if (dev->dev_flags & DF_CONFIGURED) {
|
|
pr_err("se_dev->se_dev_ptr already set for storage"
|
|
" object\n");
|
|
return -EEXIST;
|
|
}
|
|
|
|
ret = dev->transport->configure_device(dev);
|
|
if (ret)
|
|
goto out;
|
|
dev->dev_flags |= DF_CONFIGURED;
|
|
|
|
/*
|
|
* XXX: there is not much point to have two different values here..
|
|
*/
|
|
dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size;
|
|
dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth;
|
|
|
|
/*
|
|
* Align max_hw_sectors down to PAGE_SIZE I/O transfers
|
|
*/
|
|
dev->dev_attrib.hw_max_sectors =
|
|
se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors,
|
|
dev->dev_attrib.hw_block_size);
|
|
|
|
dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX);
|
|
dev->creation_time = get_jiffies_64();
|
|
|
|
ret = core_setup_alua(dev);
|
|
if (ret)
|
|
goto out;
|
|
|
|
/*
|
|
* Startup the struct se_device processing thread
|
|
*/
|
|
dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1,
|
|
dev->transport->name);
|
|
if (!dev->tmr_wq) {
|
|
pr_err("Unable to create tmr workqueue for %s\n",
|
|
dev->transport->name);
|
|
ret = -ENOMEM;
|
|
goto out_free_alua;
|
|
}
|
|
|
|
/*
|
|
* Setup work_queue for QUEUE_FULL
|
|
*/
|
|
INIT_WORK(&dev->qf_work_queue, target_qf_do_work);
|
|
|
|
/*
|
|
* Preload the initial INQUIRY const values if we are doing
|
|
* anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI
|
|
* passthrough because this is being provided by the backend LLD.
|
|
*/
|
|
if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) {
|
|
strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8);
|
|
strncpy(&dev->t10_wwn.model[0],
|
|
dev->transport->inquiry_prod, 16);
|
|
strncpy(&dev->t10_wwn.revision[0],
|
|
dev->transport->inquiry_rev, 4);
|
|
}
|
|
|
|
scsi_dump_inquiry(dev);
|
|
|
|
spin_lock(&hba->device_lock);
|
|
hba->dev_count++;
|
|
spin_unlock(&hba->device_lock);
|
|
|
|
mutex_lock(&g_device_mutex);
|
|
list_add_tail(&dev->g_dev_node, &g_device_list);
|
|
mutex_unlock(&g_device_mutex);
|
|
|
|
return 0;
|
|
|
|
out_free_alua:
|
|
core_alua_free_lu_gp_mem(dev);
|
|
out:
|
|
se_release_vpd_for_dev(dev);
|
|
return ret;
|
|
}
|
|
|
|
void target_free_device(struct se_device *dev)
|
|
{
|
|
struct se_hba *hba = dev->se_hba;
|
|
|
|
WARN_ON(!list_empty(&dev->dev_sep_list));
|
|
|
|
if (dev->dev_flags & DF_CONFIGURED) {
|
|
destroy_workqueue(dev->tmr_wq);
|
|
|
|
mutex_lock(&g_device_mutex);
|
|
list_del(&dev->g_dev_node);
|
|
mutex_unlock(&g_device_mutex);
|
|
|
|
spin_lock(&hba->device_lock);
|
|
hba->dev_count--;
|
|
spin_unlock(&hba->device_lock);
|
|
}
|
|
|
|
core_alua_free_lu_gp_mem(dev);
|
|
core_alua_set_lba_map(dev, NULL, 0, 0);
|
|
core_scsi3_free_all_registrations(dev);
|
|
se_release_vpd_for_dev(dev);
|
|
|
|
if (dev->transport->free_prot)
|
|
dev->transport->free_prot(dev);
|
|
|
|
dev->transport->free_device(dev);
|
|
}
|
|
|
|
int core_dev_setup_virtual_lun0(void)
|
|
{
|
|
struct se_hba *hba;
|
|
struct se_device *dev;
|
|
char buf[] = "rd_pages=8,rd_nullio=1";
|
|
int ret;
|
|
|
|
hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
|
|
if (IS_ERR(hba))
|
|
return PTR_ERR(hba);
|
|
|
|
dev = target_alloc_device(hba, "virt_lun0");
|
|
if (!dev) {
|
|
ret = -ENOMEM;
|
|
goto out_free_hba;
|
|
}
|
|
|
|
hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf));
|
|
|
|
ret = target_configure_device(dev);
|
|
if (ret)
|
|
goto out_free_se_dev;
|
|
|
|
lun0_hba = hba;
|
|
g_lun0_dev = dev;
|
|
return 0;
|
|
|
|
out_free_se_dev:
|
|
target_free_device(dev);
|
|
out_free_hba:
|
|
core_delete_hba(hba);
|
|
return ret;
|
|
}
|
|
|
|
|
|
void core_dev_release_virtual_lun0(void)
|
|
{
|
|
struct se_hba *hba = lun0_hba;
|
|
|
|
if (!hba)
|
|
return;
|
|
|
|
if (g_lun0_dev)
|
|
target_free_device(g_lun0_dev);
|
|
core_delete_hba(hba);
|
|
}
|