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linux-next/drivers/target/target_core_device.c
Paolo Bonzini 9b16b9edb4 target: fail REPORT LUNS with less than 16 bytes of payload
SPC says:

"The ALLOCATION LENGTH field is defined in 4.3.5.6. The allocation length
should be at least 16.  Device servers compliant with SPC return CHECK
CONDITION status, with the sense key set to ILLEGAL REQUEST, and the
additional sense code set to INVALID FIELD IN CDB when the allocation
length is less than 16 bytes".

Testcase: sg_raw -r8 /dev/sdb a0 00 00 00 00 00 00 00 00 08 00 00
    should fail with ILLEGAL REQUEST / INVALID FIELD IN CDB sense
    does not fail without the patch
    fails correctly with the patch

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2012-09-07 11:09:14 -07:00

1654 lines
46 KiB
C

/*******************************************************************************
* Filename: target_core_device.c (based on iscsi_target_device.c)
*
* This file contains the TCM Virtual Device and Disk Transport
* agnostic related functions.
*
* Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
* Copyright (c) 2005-2006 SBE, Inc. All Rights Reserved.
* Copyright (c) 2007-2010 Rising Tide Systems
* Copyright (c) 2008-2010 Linux-iSCSI.org
*
* Nicholas A. Bellinger <nab@kernel.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
******************************************************************************/
#include <linux/net.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/timer.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/kthread.h>
#include <linux/in.h>
#include <linux/export.h>
#include <net/sock.h>
#include <net/tcp.h>
#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
#include <target/target_core_base.h>
#include <target/target_core_backend.h>
#include <target/target_core_fabric.h>
#include "target_core_internal.h"
#include "target_core_alua.h"
#include "target_core_pr.h"
#include "target_core_ua.h"
static void se_dev_start(struct se_device *dev);
static void se_dev_stop(struct se_device *dev);
static struct se_hba *lun0_hba;
static struct se_subsystem_dev *lun0_su_dev;
/* not static, needed by tpg.c */
struct se_device *g_lun0_dev;
int transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
{
struct se_lun *se_lun = NULL;
struct se_session *se_sess = se_cmd->se_sess;
struct se_device *dev;
unsigned long flags;
if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
return -ENODEV;
}
spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun];
if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
struct se_dev_entry *deve = se_cmd->se_deve;
deve->total_cmds++;
deve->total_bytes += se_cmd->data_length;
if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
(deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
" Access for 0x%08x\n",
se_cmd->se_tfo->get_fabric_name(),
unpacked_lun);
spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
return -EACCES;
}
if (se_cmd->data_direction == DMA_TO_DEVICE)
deve->write_bytes += se_cmd->data_length;
else if (se_cmd->data_direction == DMA_FROM_DEVICE)
deve->read_bytes += se_cmd->data_length;
deve->deve_cmds++;
se_lun = deve->se_lun;
se_cmd->se_lun = deve->se_lun;
se_cmd->pr_res_key = deve->pr_res_key;
se_cmd->orig_fe_lun = unpacked_lun;
se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
}
spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
if (!se_lun) {
/*
* Use the se_portal_group->tpg_virt_lun0 to allow for
* REPORT_LUNS, et al to be returned when no active
* MappedLUN=0 exists for this Initiator Port.
*/
if (unpacked_lun != 0) {
se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
" Access for 0x%08x\n",
se_cmd->se_tfo->get_fabric_name(),
unpacked_lun);
return -ENODEV;
}
/*
* Force WRITE PROTECT for virtual LUN 0
*/
if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
(se_cmd->data_direction != DMA_NONE)) {
se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
return -EACCES;
}
se_lun = &se_sess->se_tpg->tpg_virt_lun0;
se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
se_cmd->orig_fe_lun = 0;
se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
}
/*
* Determine if the struct se_lun is online.
* FIXME: Check for LUN_RESET + UNIT Attention
*/
if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
return -ENODEV;
}
/* Directly associate cmd with se_dev */
se_cmd->se_dev = se_lun->lun_se_dev;
/* TODO: get rid of this and use atomics for stats */
dev = se_lun->lun_se_dev;
spin_lock_irqsave(&dev->stats_lock, flags);
dev->num_cmds++;
if (se_cmd->data_direction == DMA_TO_DEVICE)
dev->write_bytes += se_cmd->data_length;
else if (se_cmd->data_direction == DMA_FROM_DEVICE)
dev->read_bytes += se_cmd->data_length;
spin_unlock_irqrestore(&dev->stats_lock, flags);
spin_lock_irqsave(&se_lun->lun_cmd_lock, flags);
list_add_tail(&se_cmd->se_lun_node, &se_lun->lun_cmd_list);
spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags);
return 0;
}
EXPORT_SYMBOL(transport_lookup_cmd_lun);
int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
{
struct se_dev_entry *deve;
struct se_lun *se_lun = NULL;
struct se_session *se_sess = se_cmd->se_sess;
struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
unsigned long flags;
if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
return -ENODEV;
}
spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun];
deve = se_cmd->se_deve;
if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
se_tmr->tmr_lun = deve->se_lun;
se_cmd->se_lun = deve->se_lun;
se_lun = deve->se_lun;
se_cmd->pr_res_key = deve->pr_res_key;
se_cmd->orig_fe_lun = unpacked_lun;
}
spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
if (!se_lun) {
pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
" Access for 0x%08x\n",
se_cmd->se_tfo->get_fabric_name(),
unpacked_lun);
se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
return -ENODEV;
}
/*
* Determine if the struct se_lun is online.
* FIXME: Check for LUN_RESET + UNIT Attention
*/
if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
return -ENODEV;
}
/* Directly associate cmd with se_dev */
se_cmd->se_dev = se_lun->lun_se_dev;
se_tmr->tmr_dev = se_lun->lun_se_dev;
spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags);
list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list);
spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags);
return 0;
}
EXPORT_SYMBOL(transport_lookup_tmr_lun);
/*
* This function is called from core_scsi3_emulate_pro_register_and_move()
* and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
* when a matching rtpi is found.
*/
struct se_dev_entry *core_get_se_deve_from_rtpi(
struct se_node_acl *nacl,
u16 rtpi)
{
struct se_dev_entry *deve;
struct se_lun *lun;
struct se_port *port;
struct se_portal_group *tpg = nacl->se_tpg;
u32 i;
spin_lock_irq(&nacl->device_list_lock);
for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
deve = nacl->device_list[i];
if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
continue;
lun = deve->se_lun;
if (!lun) {
pr_err("%s device entries device pointer is"
" NULL, but Initiator has access.\n",
tpg->se_tpg_tfo->get_fabric_name());
continue;
}
port = lun->lun_sep;
if (!port) {
pr_err("%s device entries device pointer is"
" NULL, but Initiator has access.\n",
tpg->se_tpg_tfo->get_fabric_name());
continue;
}
if (port->sep_rtpi != rtpi)
continue;
atomic_inc(&deve->pr_ref_count);
smp_mb__after_atomic_inc();
spin_unlock_irq(&nacl->device_list_lock);
return deve;
}
spin_unlock_irq(&nacl->device_list_lock);
return NULL;
}
int core_free_device_list_for_node(
struct se_node_acl *nacl,
struct se_portal_group *tpg)
{
struct se_dev_entry *deve;
struct se_lun *lun;
u32 i;
if (!nacl->device_list)
return 0;
spin_lock_irq(&nacl->device_list_lock);
for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
deve = nacl->device_list[i];
if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
continue;
if (!deve->se_lun) {
pr_err("%s device entries device pointer is"
" NULL, but Initiator has access.\n",
tpg->se_tpg_tfo->get_fabric_name());
continue;
}
lun = deve->se_lun;
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);
array_free(nacl->device_list, TRANSPORT_MAX_LUNS_PER_TPG);
nacl->device_list = NULL;
return 0;
}
void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd)
{
struct se_dev_entry *deve;
unsigned long flags;
spin_lock_irqsave(&se_nacl->device_list_lock, flags);
deve = se_nacl->device_list[se_cmd->orig_fe_lun];
deve->deve_cmds--;
spin_unlock_irqrestore(&se_nacl->device_list_lock, flags);
}
void core_update_device_list_access(
u32 mapped_lun,
u32 lun_access,
struct se_node_acl *nacl)
{
struct se_dev_entry *deve;
spin_lock_irq(&nacl->device_list_lock);
deve = nacl->device_list[mapped_lun];
if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
} else {
deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
}
spin_unlock_irq(&nacl->device_list_lock);
}
/* core_enable_device_list_for_node():
*
*
*/
int core_enable_device_list_for_node(
struct se_lun *lun,
struct se_lun_acl *lun_acl,
u32 mapped_lun,
u32 lun_access,
struct se_node_acl *nacl,
struct se_portal_group *tpg)
{
struct se_port *port = lun->lun_sep;
struct se_dev_entry *deve;
spin_lock_irq(&nacl->device_list_lock);
deve = nacl->device_list[mapped_lun];
/*
* Check if the call is handling demo mode -> explict LUN ACL
* transition. This transition must be for the same struct se_lun
* + mapped_lun that was setup in demo mode..
*/
if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
if (deve->se_lun_acl != NULL) {
pr_err("struct se_dev_entry->se_lun_acl"
" already set for demo mode -> explict"
" LUN ACL transition\n");
spin_unlock_irq(&nacl->device_list_lock);
return -EINVAL;
}
if (deve->se_lun != lun) {
pr_err("struct se_dev_entry->se_lun does"
" match passed struct se_lun for demo mode"
" -> explict LUN ACL transition\n");
spin_unlock_irq(&nacl->device_list_lock);
return -EINVAL;
}
deve->se_lun_acl = lun_acl;
if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
} else {
deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
}
spin_unlock_irq(&nacl->device_list_lock);
return 0;
}
deve->se_lun = lun;
deve->se_lun_acl = lun_acl;
deve->mapped_lun = mapped_lun;
deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
} else {
deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
}
deve->creation_time = get_jiffies_64();
deve->attach_count++;
spin_unlock_irq(&nacl->device_list_lock);
spin_lock_bh(&port->sep_alua_lock);
list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
spin_unlock_bh(&port->sep_alua_lock);
return 0;
}
/* core_disable_device_list_for_node():
*
*
*/
int core_disable_device_list_for_node(
struct se_lun *lun,
struct se_lun_acl *lun_acl,
u32 mapped_lun,
u32 lun_access,
struct se_node_acl *nacl,
struct se_portal_group *tpg)
{
struct se_port *port = lun->lun_sep;
struct se_dev_entry *deve = nacl->device_list[mapped_lun];
/*
* If the MappedLUN entry is being disabled, the entry in
* port->sep_alua_list must be removed now before clearing the
* struct se_dev_entry pointers below as logic in
* core_alua_do_transition_tg_pt() depends on these being present.
*
* deve->se_lun_acl will be NULL for demo-mode created LUNs
* that have not been explicitly converted to MappedLUNs ->
* struct se_lun_acl, but we remove deve->alua_port_list from
* port->sep_alua_list. This also means that active UAs and
* NodeACL context specific PR metadata for demo-mode
* MappedLUN *deve will be released below..
*/
spin_lock_bh(&port->sep_alua_lock);
list_del(&deve->alua_port_list);
spin_unlock_bh(&port->sep_alua_lock);
/*
* Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
* PR operation to complete.
*/
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_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 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;
if (se_cmd->data_length < 16) {
pr_warn("REPORT LUNS allocation length %u too small\n",
se_cmd->data_length);
se_cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
return -EINVAL;
}
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;
}
static 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_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(), 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_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_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_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_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);
}
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);
}