/*
* CDB emulation for non-READ/WRITE commands.
*
* Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc.
* Copyright (c) 2005, 2006, 2007 SBE, Inc.
* 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 <asm/unaligned.h>
#include <scsi/scsi.h>
#include <target/target_core_base.h>
#include <target/target_core_transport.h>
#include <target/target_core_fabric_ops.h>
#include "target_core_ua.h"
static void
target_fill_alua_data(struct se_port *port, unsigned char *buf)
{
struct t10_alua_tg_pt_gp *tg_pt_gp;
struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
/*
* Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS.
*/
buf[5] = 0x80;
/*
* Set TPGS field for explict and/or implict ALUA access type
* and opteration.
*
* See spc4r17 section 6.4.2 Table 135
*/
if (!port)
return;
tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
if (!tg_pt_gp_mem)
return;
spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
if (tg_pt_gp)
buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type;
spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
}
static int
target_emulate_inquiry_std(struct se_cmd *cmd)
{
struct se_lun *lun = cmd->se_lun;
struct se_device *dev = cmd->se_dev;
unsigned char *buf;
/*
* Make sure we at least have 6 bytes of INQUIRY response
* payload going back for EVPD=0
*/
if (cmd->data_length < 6) {
printk(KERN_ERR "SCSI Inquiry payload length: %u"
" too small for EVPD=0\n", cmd->data_length);
return -EINVAL;
}
buf = transport_kmap_first_data_page(cmd);
buf[0] = dev->transport->get_device_type(dev);
if (buf[0] == TYPE_TAPE)
buf[1] = 0x80;
buf[2] = dev->transport->get_device_rev(dev);
/*
* Enable SCCS and TPGS fields for Emulated ALUA
*/
if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED)
target_fill_alua_data(lun->lun_sep, buf);
if (cmd->data_length < 8) {
buf[4] = 1; /* Set additional length to 1 */
goto out;
}
buf[7] = 0x32; /* Sync=1 and CmdQue=1 */
/*
* Do not include vendor, product, reversion info in INQUIRY
* response payload for cdbs with a small allocation length.
*/
if (cmd->data_length < 36) {
buf[4] = 3; /* Set additional length to 3 */
goto out;
}
snprintf((unsigned char *)&buf[8], 8, "LIO-ORG");
snprintf((unsigned char *)&buf[16], 16, "%s",
&dev->se_sub_dev->t10_wwn.model[0]);
snprintf((unsigned char *)&buf[32], 4, "%s",
&dev->