1132 lines
30 KiB
C
1132 lines
30 KiB
C
/*
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* CDB emulation for non-READ/WRITE commands.
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*
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* Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc.
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* Copyright (c) 2005, 2006, 2007 SBE, Inc.
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* Copyright (c) 2007-2010 Rising Tide Systems
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* Copyright (c) 2008-2010 Linux-iSCSI.org
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*
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* Nicholas A. Bellinger <nab@kernel.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <asm/unaligned.h>
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#include <scsi/scsi.h>
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#include <target/target_core_base.h>
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#include <target/target_core_transport.h>
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#include <target/target_core_fabric_ops.h>
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#include "target_core_ua.h"
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static void
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target_fill_alua_data(struct se_port *port, unsigned char *buf)
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{
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struct t10_alua_tg_pt_gp *tg_pt_gp;
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struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
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/*
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* Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS.
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*/
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buf[5] = 0x80;
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/*
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* Set TPGS field for explict and/or implict ALUA access type
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* and opteration.
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*
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* See spc4r17 section 6.4.2 Table 135
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*/
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if (!port)
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return;
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tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
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if (!tg_pt_gp_mem)
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return;
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spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
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tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
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if (tg_pt_gp)
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buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type;
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spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
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}
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static int
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target_emulate_inquiry_std(struct se_cmd *cmd)
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{
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struct se_lun *lun = SE_LUN(cmd);
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struct se_device *dev = SE_DEV(cmd);
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unsigned char *buf = cmd->t_task->t_task_buf;
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/*
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* Make sure we at least have 6 bytes of INQUIRY response
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* payload going back for EVPD=0
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*/
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if (cmd->data_length < 6) {
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printk(KERN_ERR "SCSI Inquiry payload length: %u"
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" too small for EVPD=0\n", cmd->data_length);
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return -1;
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}
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buf[0] = dev->transport->get_device_type(dev);
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if (buf[0] == TYPE_TAPE)
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buf[1] = 0x80;
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buf[2] = dev->transport->get_device_rev(dev);
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/*
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* Enable SCCS and TPGS fields for Emulated ALUA
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*/
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if (T10_ALUA(dev->se_sub_dev)->alua_type == SPC3_ALUA_EMULATED)
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target_fill_alua_data(lun->lun_sep, buf);
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if (cmd->data_length < 8) {
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buf[4] = 1; /* Set additional length to 1 */
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return 0;
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}
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buf[7] = 0x32; /* Sync=1 and CmdQue=1 */
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/*
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* Do not include vendor, product, reversion info in INQUIRY
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* response payload for cdbs with a small allocation length.
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*/
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if (cmd->data_length < 36) {
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buf[4] = 3; /* Set additional length to 3 */
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return 0;
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}
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snprintf((unsigned char *)&buf[8], 8, "LIO-ORG");
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snprintf((unsigned char *)&buf[16], 16, "%s",
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&DEV_T10_WWN(dev)->model[0]);
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snprintf((unsigned char *)&buf[32], 4, "%s",
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&DEV_T10_WWN(dev)->revision[0]);
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buf[4] = 31; /* Set additional length to 31 */
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return 0;
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}
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/* supported vital product data pages */
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static int
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target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf)
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{
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buf[1] = 0x00;
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if (cmd->data_length < 8)
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return 0;
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buf[4] = 0x0;
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/*
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* Only report the INQUIRY EVPD=1 pages after a valid NAA
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* Registered Extended LUN WWN has been set via ConfigFS
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* during device creation/restart.
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*/
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if (SE_DEV(cmd)->se_sub_dev->su_dev_flags &
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SDF_EMULATED_VPD_UNIT_SERIAL) {
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buf[3] = 3;
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buf[5] = 0x80;
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buf[6] = 0x83;
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buf[7] = 0x86;
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}
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return 0;
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}
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/* unit serial number */
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static int
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target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf)
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{
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struct se_device *dev = SE_DEV(cmd);
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u16 len = 0;
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buf[1] = 0x80;
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if (dev->se_sub_dev->su_dev_flags &
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SDF_EMULATED_VPD_UNIT_SERIAL) {
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u32 unit_serial_len;
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unit_serial_len =
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strlen(&DEV_T10_WWN(dev)->unit_serial[0]);
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unit_serial_len++; /* For NULL Terminator */
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if (((len + 4) + unit_serial_len) > cmd->data_length) {
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len += unit_serial_len;
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buf[2] = ((len >> 8) & 0xff);
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buf[3] = (len & 0xff);
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return 0;
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}
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len += sprintf((unsigned char *)&buf[4], "%s",
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&DEV_T10_WWN(dev)->unit_serial[0]);
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len++; /* Extra Byte for NULL Terminator */
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buf[3] = len;
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}
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return 0;
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}
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/*
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* Device identification VPD, for a complete list of
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* DESIGNATOR TYPEs see spc4r17 Table 459.
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*/
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static int
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target_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf)
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{
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struct se_device *dev = SE_DEV(cmd);
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struct se_lun *lun = SE_LUN(cmd);
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struct se_port *port = NULL;
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struct se_portal_group *tpg = NULL;
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struct t10_alua_lu_gp_member *lu_gp_mem;
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struct t10_alua_tg_pt_gp *tg_pt_gp;
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struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
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unsigned char binary, binary_new;
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unsigned char *prod = &DEV_T10_WWN(dev)->model[0];
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u32 prod_len;
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u32 unit_serial_len, off = 0;
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int i;
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u16 len = 0, id_len;
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buf[1] = 0x83;
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off = 4;
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/*
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* NAA IEEE Registered Extended Assigned designator format, see
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* spc4r17 section 7.7.3.6.5
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*
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* We depend upon a target_core_mod/ConfigFS provided
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* /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial
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* value in order to return the NAA id.
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*/
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if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL))
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goto check_t10_vend_desc;
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if (off + 20 > cmd->data_length)
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goto check_t10_vend_desc;
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/* CODE SET == Binary */
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buf[off++] = 0x1;
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/* Set ASSOICATION == addressed logical unit: 0)b */
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buf[off] = 0x00;
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/* Identifier/Designator type == NAA identifier */
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buf[off++] = 0x3;
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off++;
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/* Identifier/Designator length */
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buf[off++] = 0x10;
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/*
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* Start NAA IEEE Registered Extended Identifier/Designator
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*/
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buf[off++] = (0x6 << 4);
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/*
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* Use OpenFabrics IEEE Company ID: 00 14 05
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*/
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buf[off++] = 0x01;
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buf[off++] = 0x40;
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buf[off] = (0x5 << 4);
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/*
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* Return ConfigFS Unit Serial Number information for
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* VENDOR_SPECIFIC_IDENTIFIER and
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* VENDOR_SPECIFIC_IDENTIFIER_EXTENTION
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*/
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binary = transport_asciihex_to_binaryhex(
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&DEV_T10_WWN(dev)->unit_serial[0]);
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buf[off++] |= (binary & 0xf0) >> 4;
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for (i = 0; i < 24; i += 2) {
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binary_new = transport_asciihex_to_binaryhex(
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&DEV_T10_WWN(dev)->unit_serial[i+2]);
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buf[off] = (binary & 0x0f) << 4;
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buf[off++] |= (binary_new & 0xf0) >> 4;
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binary = binary_new;
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}
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len = 20;
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off = (len + 4);
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check_t10_vend_desc:
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/*
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* T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4
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*/
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id_len = 8; /* For Vendor field */
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prod_len = 4; /* For VPD Header */
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prod_len += 8; /* For Vendor field */
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prod_len += strlen(prod);
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prod_len++; /* For : */
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if (dev->se_sub_dev->su_dev_flags &
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SDF_EMULATED_VPD_UNIT_SERIAL) {
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unit_serial_len =
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strlen(&DEV_T10_WWN(dev)->unit_serial[0]);
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unit_serial_len++; /* For NULL Terminator */
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if ((len + (id_len + 4) +
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(prod_len + unit_serial_len)) >
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cmd->data_length) {
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len += (prod_len + unit_serial_len);
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goto check_port;
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}
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id_len += sprintf((unsigned char *)&buf[off+12],
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"%s:%s", prod,
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&DEV_T10_WWN(dev)->unit_serial[0]);
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}
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buf[off] = 0x2; /* ASCII */
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buf[off+1] = 0x1; /* T10 Vendor ID */
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buf[off+2] = 0x0;
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memcpy((unsigned char *)&buf[off+4], "LIO-ORG", 8);
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/* Extra Byte for NULL Terminator */
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id_len++;
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/* Identifier Length */
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buf[off+3] = id_len;
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/* Header size for Designation descriptor */
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len += (id_len + 4);
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off += (id_len + 4);
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/*
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* struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD
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*/
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check_port:
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port = lun->lun_sep;
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if (port) {
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struct t10_alua_lu_gp *lu_gp;
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u32 padding, scsi_name_len;
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u16 lu_gp_id = 0;
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u16 tg_pt_gp_id = 0;
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u16 tpgt;
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tpg = port->sep_tpg;
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/*
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* Relative target port identifer, see spc4r17
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* section 7.7.3.7
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*
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* Get the PROTOCOL IDENTIFIER as defined by spc4r17
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* section 7.5.1 Table 362
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*/
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if (((len + 4) + 8) > cmd->data_length) {
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len += 8;
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goto check_tpgi;
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}
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buf[off] =
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(TPG_TFO(tpg)->get_fabric_proto_ident(tpg) << 4);
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buf[off++] |= 0x1; /* CODE SET == Binary */
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buf[off] = 0x80; /* Set PIV=1 */
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/* Set ASSOICATION == target port: 01b */
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buf[off] |= 0x10;
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/* DESIGNATOR TYPE == Relative target port identifer */
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buf[off++] |= 0x4;
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off++; /* Skip over Reserved */
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buf[off++] = 4; /* DESIGNATOR LENGTH */
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/* Skip over Obsolete field in RTPI payload
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* in Table 472 */
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off += 2;
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buf[off++] = ((port->sep_rtpi >> 8) & 0xff);
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buf[off++] = (port->sep_rtpi & 0xff);
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len += 8; /* Header size + Designation descriptor */
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/*
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* Target port group identifier, see spc4r17
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* section 7.7.3.8
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*
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* Get the PROTOCOL IDENTIFIER as defined by spc4r17
|
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* section 7.5.1 Table 362
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*/
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check_tpgi:
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if (T10_ALUA(dev->se_sub_dev)->alua_type !=
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SPC3_ALUA_EMULATED)
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goto check_scsi_name;
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if (((len + 4) + 8) > cmd->data_length) {
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len += 8;
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goto check_lu_gp;
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}
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tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
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if (!tg_pt_gp_mem)
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goto check_lu_gp;
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spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
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tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
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if (!(tg_pt_gp)) {
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spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
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goto check_lu_gp;
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}
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tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id;
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spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
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buf[off] =
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(TPG_TFO(tpg)->get_fabric_proto_ident(tpg) << 4);
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buf[off++] |= 0x1; /* CODE SET == Binary */
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buf[off] = 0x80; /* Set PIV=1 */
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/* Set ASSOICATION == target port: 01b */
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buf[off] |= 0x10;
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/* DESIGNATOR TYPE == Target port group identifier */
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buf[off++] |= 0x5;
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off++; /* Skip over Reserved */
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buf[off++] = 4; /* DESIGNATOR LENGTH */
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off += 2; /* Skip over Reserved Field */
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buf[off++] = ((tg_pt_gp_id >> 8) & 0xff);
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buf[off++] = (tg_pt_gp_id & 0xff);
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len += 8; /* Header size + Designation descriptor */
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/*
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* Logical Unit Group identifier, see spc4r17
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* section 7.7.3.8
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*/
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check_lu_gp:
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if (((len + 4) + 8) > cmd->data_length) {
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len += 8;
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goto check_scsi_name;
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}
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lu_gp_mem = dev->dev_alua_lu_gp_mem;
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if (!(lu_gp_mem))
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goto check_scsi_name;
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spin_lock(&lu_gp_mem->lu_gp_mem_lock);
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lu_gp = lu_gp_mem->lu_gp;
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if (!(lu_gp)) {
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spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
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goto check_scsi_name;
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}
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lu_gp_id = lu_gp->lu_gp_id;
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spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
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|
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buf[off++] |= 0x1; /* CODE SET == Binary */
|
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/* DESIGNATOR TYPE == Logical Unit Group identifier */
|
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buf[off++] |= 0x6;
|
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off++; /* Skip over Reserved */
|
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buf[off++] = 4; /* DESIGNATOR LENGTH */
|
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off += 2; /* Skip over Reserved Field */
|
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buf[off++] = ((lu_gp_id >> 8) & 0xff);
|
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buf[off++] = (lu_gp_id & 0xff);
|
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len += 8; /* Header size + Designation descriptor */
|
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/*
|
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* SCSI name string designator, see spc4r17
|
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* section 7.7.3.11
|
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*
|
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* Get the PROTOCOL IDENTIFIER as defined by spc4r17
|
|
* section 7.5.1 Table 362
|
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*/
|
|
check_scsi_name:
|
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scsi_name_len = strlen(TPG_TFO(tpg)->tpg_get_wwn(tpg));
|
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/* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */
|
|
scsi_name_len += 10;
|
|
/* Check for 4-byte padding */
|
|
padding = ((-scsi_name_len) & 3);
|
|
if (padding != 0)
|
|
scsi_name_len += padding;
|
|
/* Header size + Designation descriptor */
|
|
scsi_name_len += 4;
|
|
|
|
if (((len + 4) + scsi_name_len) > cmd->data_length) {
|
|
len += scsi_name_len;
|
|
goto set_len;
|
|
}
|
|
buf[off] =
|
|
(TPG_TFO(tpg)->get_fabric_proto_ident(tpg) << 4);
|
|
buf[off++] |= 0x3; /* CODE SET == UTF-8 */
|
|
buf[off] = 0x80; /* Set PIV=1 */
|
|
/* Set ASSOICATION == target port: 01b */
|
|
buf[off] |= 0x10;
|
|
/* DESIGNATOR TYPE == SCSI name string */
|
|
buf[off++] |= 0x8;
|
|
off += 2; /* Skip over Reserved and length */
|
|
/*
|
|
* SCSI name string identifer containing, $FABRIC_MOD
|
|
* dependent information. For LIO-Target and iSCSI
|
|
* Target Port, this means "<iSCSI name>,t,0x<TPGT> in
|
|
* UTF-8 encoding.
|
|
*/
|
|
tpgt = TPG_TFO(tpg)->tpg_get_tag(tpg);
|
|
scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x",
|
|
TPG_TFO(tpg)->tpg_get_wwn(tpg), tpgt);
|
|
scsi_name_len += 1 /* Include NULL terminator */;
|
|
/*
|
|
* The null-terminated, null-padded (see 4.4.2) SCSI
|
|
* NAME STRING field contains a UTF-8 format string.
|
|
* The number of bytes in the SCSI NAME STRING field
|
|
* (i.e., the value in the DESIGNATOR LENGTH field)
|
|
* shall be no larger than 256 and shall be a multiple
|
|
* of four.
|
|
*/
|
|
if (padding)
|
|
scsi_name_len += padding;
|
|
|
|
buf[off-1] = scsi_name_len;
|
|
off += scsi_name_len;
|
|
/* Header size + Designation descriptor */
|
|
len += (scsi_name_len + 4);
|
|
}
|
|
set_len:
|
|
buf[2] = ((len >> 8) & 0xff);
|
|
buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */
|
|
return 0;
|
|
}
|
|
|
|
/* Extended INQUIRY Data VPD Page */
|
|
static int
|
|
target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf)
|
|
{
|
|
if (cmd->data_length < 60)
|
|
return 0;
|
|
|
|
buf[1] = 0x86;
|
|
buf[2] = 0x3c;
|
|
/* Set HEADSUP, ORDSUP, SIMPSUP */
|
|
buf[5] = 0x07;
|
|
|
|
/* If WriteCache emulation is enabled, set V_SUP */
|
|
if (DEV_ATTRIB(SE_DEV(cmd))->emulate_write_cache > 0)
|
|
buf[6] = 0x01;
|
|
return 0;
|
|
}
|
|
|
|
/* Block Limits VPD page */
|
|
static int
|
|
target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
|
|
{
|
|
struct se_device *dev = SE_DEV(cmd);
|
|
int have_tp = 0;
|
|
|
|
/*
|
|
* Following sbc3r22 section 6.5.3 Block Limits VPD page, when
|
|
* emulate_tpu=1 or emulate_tpws=1 we will be expect a
|
|
* different page length for Thin Provisioning.
|
|
*/
|
|
if (DEV_ATTRIB(dev)->emulate_tpu || DEV_ATTRIB(dev)->emulate_tpws)
|
|
have_tp = 1;
|
|
|
|
if (cmd->data_length < (0x10 + 4)) {
|
|
printk(KERN_INFO "Received data_length: %u"
|
|
" too small for EVPD 0xb0\n",
|
|
cmd->data_length);
|
|
return -1;
|
|
}
|
|
|
|
if (have_tp && cmd->data_length < (0x3c + 4)) {
|
|
printk(KERN_INFO "Received data_length: %u"
|
|
" too small for TPE=1 EVPD 0xb0\n",
|
|
cmd->data_length);
|
|
have_tp = 0;
|
|
}
|
|
|
|
buf[0] = dev->transport->get_device_type(dev);
|
|
buf[1] = 0xb0;
|
|
buf[3] = have_tp ? 0x3c : 0x10;
|
|
|
|
/*
|
|
* Set OPTIMAL TRANSFER LENGTH GRANULARITY
|
|
*/
|
|
put_unaligned_be16(1, &buf[6]);
|
|
|
|
/*
|
|
* Set MAXIMUM TRANSFER LENGTH
|
|
*/
|
|
put_unaligned_be32(DEV_ATTRIB(dev)->max_sectors, &buf[8]);
|
|
|
|
/*
|
|
* Set OPTIMAL TRANSFER LENGTH
|
|
*/
|
|
put_unaligned_be32(DEV_ATTRIB(dev)->optimal_sectors, &buf[12]);
|
|
|
|
/*
|
|
* Exit now if we don't support TP or the initiator sent a too
|
|
* short buffer.
|
|
*/
|
|
if (!have_tp || cmd->data_length < (0x3c + 4))
|
|
return 0;
|
|
|
|
/*
|
|
* Set MAXIMUM UNMAP LBA COUNT
|
|
*/
|
|
put_unaligned_be32(DEV_ATTRIB(dev)->max_unmap_lba_count, &buf[20]);
|
|
|
|
/*
|
|
* Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT
|
|
*/
|
|
put_unaligned_be32(DEV_ATTRIB(dev)->max_unmap_block_desc_count,
|
|
&buf[24]);
|
|
|
|
/*
|
|
* Set OPTIMAL UNMAP GRANULARITY
|
|
*/
|
|
put_unaligned_be32(DEV_ATTRIB(dev)->unmap_granularity, &buf[28]);
|
|
|
|
/*
|
|
* UNMAP GRANULARITY ALIGNMENT
|
|
*/
|
|
put_unaligned_be32(DEV_ATTRIB(dev)->unmap_granularity_alignment,
|
|
&buf[32]);
|
|
if (DEV_ATTRIB(dev)->unmap_granularity_alignment != 0)
|
|
buf[32] |= 0x80; /* Set the UGAVALID bit */
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Thin Provisioning VPD */
|
|
static int
|
|
target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf)
|
|
{
|
|
struct se_device *dev = SE_DEV(cmd);
|
|
|
|
/*
|
|
* From sbc3r22 section 6.5.4 Thin Provisioning VPD page:
|
|
*
|
|
* The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to
|
|
* zero, then the page length shall be set to 0004h. If the DP bit
|
|
* is set to one, then the page length shall be set to the value
|
|
* defined in table 162.
|
|
*/
|
|
buf[0] = dev->transport->get_device_type(dev);
|
|
buf[1] = 0xb2;
|
|
|
|
/*
|
|
* Set Hardcoded length mentioned above for DP=0
|
|
*/
|
|
put_unaligned_be16(0x0004, &buf[2]);
|
|
|
|
/*
|
|
* The THRESHOLD EXPONENT field indicates the threshold set size in
|
|
* LBAs as a power of 2 (i.e., the threshold set size is equal to
|
|
* 2(threshold exponent)).
|
|
*
|
|
* Note that this is currently set to 0x00 as mkp says it will be
|
|
* changing again. We can enable this once it has settled in T10
|
|
* and is actually used by Linux/SCSI ML code.
|
|
*/
|
|
buf[4] = 0x00;
|
|
|
|
/*
|
|
* A TPU bit set to one indicates that the device server supports
|
|
* the UNMAP command (see 5.25). A TPU bit set to zero indicates
|
|
* that the device server does not support the UNMAP command.
|
|
*/
|
|
if (DEV_ATTRIB(dev)->emulate_tpu != 0)
|
|
buf[5] = 0x80;
|
|
|
|
/*
|
|
* A TPWS bit set to one indicates that the device server supports
|
|
* the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs.
|
|
* A TPWS bit set to zero indicates that the device server does not
|
|
* support the use of the WRITE SAME (16) command to unmap LBAs.
|
|
*/
|
|
if (DEV_ATTRIB(dev)->emulate_tpws != 0)
|
|
buf[5] |= 0x40;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
target_emulate_inquiry(struct se_cmd *cmd)
|
|
{
|
|
struct se_device *dev = SE_DEV(cmd);
|
|
unsigned char *buf = cmd->t_task->t_task_buf;
|
|
unsigned char *cdb = cmd->t_task->t_task_cdb;
|
|
|
|
if (!(cdb[1] & 0x1))
|
|
return target_emulate_inquiry_std(cmd);
|
|
|
|
/*
|
|
* Make sure we at least have 4 bytes of INQUIRY response
|
|
* payload for 0x00 going back for EVPD=1. Note that 0x80
|
|
* and 0x83 will check for enough payload data length and
|
|
* jump to set_len: label when there is not enough inquiry EVPD
|
|
* payload length left for the next outgoing EVPD metadata
|
|
*/
|
|
if (cmd->data_length < 4) {
|
|
printk(KERN_ERR "SCSI Inquiry payload length: %u"
|
|
" too small for EVPD=1\n", cmd->data_length);
|
|
return -1;
|
|
}
|
|
buf[0] = dev->transport->get_device_type(dev);
|
|
|
|
switch (cdb[2]) {
|
|
case 0x00:
|
|
return target_emulate_evpd_00(cmd, buf);
|
|
case 0x80:
|
|
return target_emulate_evpd_80(cmd, buf);
|
|
case 0x83:
|
|
return target_emulate_evpd_83(cmd, buf);
|
|
case 0x86:
|
|
return target_emulate_evpd_86(cmd, buf);
|
|
case 0xb0:
|
|
return target_emulate_evpd_b0(cmd, buf);
|
|
case 0xb2:
|
|
return target_emulate_evpd_b2(cmd, buf);
|
|
default:
|
|
printk(KERN_ERR "Unknown VPD Code: 0x%02x\n", cdb[2]);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
target_emulate_readcapacity(struct se_cmd *cmd)
|
|
{
|
|
struct se_device *dev = SE_DEV(cmd);
|
|
unsigned char *buf = cmd->t_task->t_task_buf;
|
|
u32 blocks = dev->transport->get_blocks(dev);
|
|
|
|
buf[0] = (blocks >> 24) & 0xff;
|
|
buf[1] = (blocks >> 16) & 0xff;
|
|
buf[2] = (blocks >> 8) & 0xff;
|
|
buf[3] = blocks & 0xff;
|
|
buf[4] = (DEV_ATTRIB(dev)->block_size >> 24) & 0xff;
|
|
buf[5] = (DEV_ATTRIB(dev)->block_size >> 16) & 0xff;
|
|
buf[6] = (DEV_ATTRIB(dev)->block_size >> 8) & 0xff;
|
|
buf[7] = DEV_ATTRIB(dev)->block_size & 0xff;
|
|
/*
|
|
* Set max 32-bit blocks to signal SERVICE ACTION READ_CAPACITY_16
|
|
*/
|
|
if (DEV_ATTRIB(dev)->emulate_tpu || DEV_ATTRIB(dev)->emulate_tpws)
|
|
put_unaligned_be32(0xFFFFFFFF, &buf[0]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
target_emulate_readcapacity_16(struct se_cmd *cmd)
|
|
{
|
|
struct se_device *dev = SE_DEV(cmd);
|
|
unsigned char *buf = cmd->t_task->t_task_buf;
|
|
unsigned long long blocks = dev->transport->get_blocks(dev);
|
|
|
|
buf[0] = (blocks >> 56) & 0xff;
|
|
buf[1] = (blocks >> 48) & 0xff;
|
|
buf[2] = (blocks >> 40) & 0xff;
|
|
buf[3] = (blocks >> 32) & 0xff;
|
|
buf[4] = (blocks >> 24) & 0xff;
|
|
buf[5] = (blocks >> 16) & 0xff;
|
|
buf[6] = (blocks >> 8) & 0xff;
|
|
buf[7] = blocks & 0xff;
|
|
buf[8] = (DEV_ATTRIB(dev)->block_size >> 24) & 0xff;
|
|
buf[9] = (DEV_ATTRIB(dev)->block_size >> 16) & 0xff;
|
|
buf[10] = (DEV_ATTRIB(dev)->block_size >> 8) & 0xff;
|
|
buf[11] = DEV_ATTRIB(dev)->block_size & 0xff;
|
|
/*
|
|
* Set Thin Provisioning Enable bit following sbc3r22 in section
|
|
* READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled.
|
|
*/
|
|
if (DEV_ATTRIB(dev)->emulate_tpu || DEV_ATTRIB(dev)->emulate_tpws)
|
|
buf[14] = 0x80;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
target_modesense_rwrecovery(unsigned char *p)
|
|
{
|
|
p[0] = 0x01;
|
|
p[1] = 0x0a;
|
|
|
|
return 12;
|
|
}
|
|
|
|
static int
|
|
target_modesense_control(struct se_device *dev, unsigned char *p)
|
|
{
|
|
p[0] = 0x0a;
|
|
p[1] = 0x0a;
|
|
p[2] = 2;
|
|
/*
|
|
* From spc4r17, section 7.4.6 Control mode Page
|
|
*
|
|
* Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b
|
|
*
|
|
* 00b: The logical unit shall clear any unit attention condition
|
|
* reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
|
|
* status and shall not establish a unit attention condition when a com-
|
|
* mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT
|
|
* status.
|
|
*
|
|
* 10b: The logical unit shall not clear any unit attention condition
|
|
* reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
|
|
* status and shall not establish a unit attention condition when
|
|
* a command is completed with BUSY, TASK SET FULL, or RESERVATION
|
|
* CONFLICT status.
|
|
*
|
|
* 11b a The logical unit shall not clear any unit attention condition
|
|
* reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
|
|
* status and shall establish a unit attention condition for the
|
|
* initiator port associated with the I_T nexus on which the BUSY,
|
|
* TASK SET FULL, or RESERVATION CONFLICT status is being returned.
|
|
* Depending on the status, the additional sense code shall be set to
|
|
* PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS
|
|
* RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE
|
|
* command, a unit attention condition shall be established only once
|
|
* for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless
|
|
* to the number of commands completed with one of those status codes.
|
|
*/
|
|
p[4] = (DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl == 2) ? 0x30 :
|
|
(DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00;
|
|
/*
|
|
* From spc4r17, section 7.4.6 Control mode Page
|
|
*
|
|
* Task Aborted Status (TAS) bit set to zero.
|
|
*
|
|
* A task aborted status (TAS) bit set to zero specifies that aborted
|
|
* tasks shall be terminated by the device server without any response
|
|
* to the application client. A TAS bit set to one specifies that tasks
|
|
* aborted by the actions of an I_T nexus other than the I_T nexus on
|
|
* which the command was received shall be completed with TASK ABORTED
|
|
* status (see SAM-4).
|
|
*/
|
|
p[5] = (DEV_ATTRIB(dev)->emulate_tas) ? 0x40 : 0x00;
|
|
p[8] = 0xff;
|
|
p[9] = 0xff;
|
|
p[11] = 30;
|
|
|
|
return 12;
|
|
}
|
|
|
|
static int
|
|
target_modesense_caching(struct se_device *dev, unsigned char *p)
|
|
{
|
|
p[0] = 0x08;
|
|
p[1] = 0x12;
|
|
if (DEV_ATTRIB(dev)->emulate_write_cache > 0)
|
|
p[2] = 0x04; /* Write Cache Enable */
|
|
p[12] = 0x20; /* Disabled Read Ahead */
|
|
|
|
return 20;
|
|
}
|
|
|
|
static void
|
|
target_modesense_write_protect(unsigned char *buf, int type)
|
|
{
|
|
/*
|
|
* I believe that the WP bit (bit 7) in the mode header is the same for
|
|
* all device types..
|
|
*/
|
|
switch (type) {
|
|
case TYPE_DISK:
|
|
case TYPE_TAPE:
|
|
default:
|
|
buf[0] |= 0x80; /* WP bit */
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
target_modesense_dpofua(unsigned char *buf, int type)
|
|
{
|
|
switch (type) {
|
|
case TYPE_DISK:
|
|
buf[0] |= 0x10; /* DPOFUA bit */
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int
|
|
target_emulate_modesense(struct se_cmd *cmd, int ten)
|
|
{
|
|
struct se_device *dev = SE_DEV(cmd);
|
|
char *cdb = cmd->t_task->t_task_cdb;
|
|
unsigned char *rbuf = cmd->t_task->t_task_buf;
|
|
int type = dev->transport->get_device_type(dev);
|
|
int offset = (ten) ? 8 : 4;
|
|
int length = 0;
|
|
unsigned char buf[SE_MODE_PAGE_BUF];
|
|
|
|
memset(buf, 0, SE_MODE_PAGE_BUF);
|
|
|
|
switch (cdb[2] & 0x3f) {
|
|
case 0x01:
|
|
length = target_modesense_rwrecovery(&buf[offset]);
|
|
break;
|
|
case 0x08:
|
|
length = target_modesense_caching(dev, &buf[offset]);
|
|
break;
|
|
case 0x0a:
|
|
length = target_modesense_control(dev, &buf[offset]);
|
|
break;
|
|
case 0x3f:
|
|
length = target_modesense_rwrecovery(&buf[offset]);
|
|
length += target_modesense_caching(dev, &buf[offset+length]);
|
|
length += target_modesense_control(dev, &buf[offset+length]);
|
|
break;
|
|
default:
|
|
printk(KERN_ERR "Got Unknown Mode Page: 0x%02x\n",
|
|
cdb[2] & 0x3f);
|
|
return PYX_TRANSPORT_UNKNOWN_MODE_PAGE;
|
|
}
|
|
offset += length;
|
|
|
|
if (ten) {
|
|
offset -= 2;
|
|
buf[0] = (offset >> 8) & 0xff;
|
|
buf[1] = offset & 0xff;
|
|
|
|
if ((SE_LUN(cmd)->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) ||
|
|
(cmd->se_deve &&
|
|
(cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
|
|
target_modesense_write_protect(&buf[3], type);
|
|
|
|
if ((DEV_ATTRIB(dev)->emulate_write_cache > 0) &&
|
|
(DEV_ATTRIB(dev)->emulate_fua_write > 0))
|
|
target_modesense_dpofua(&buf[3], type);
|
|
|
|
if ((offset + 2) > cmd->data_length)
|
|
offset = cmd->data_length;
|
|
|
|
} else {
|
|
offset -= 1;
|
|
buf[0] = offset & 0xff;
|
|
|
|
if ((SE_LUN(cmd)->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) ||
|
|
(cmd->se_deve &&
|
|
(cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
|
|
target_modesense_write_protect(&buf[2], type);
|
|
|
|
if ((DEV_ATTRIB(dev)->emulate_write_cache > 0) &&
|
|
(DEV_ATTRIB(dev)->emulate_fua_write > 0))
|
|
target_modesense_dpofua(&buf[2], type);
|
|
|
|
if ((offset + 1) > cmd->data_length)
|
|
offset = cmd->data_length;
|
|
}
|
|
memcpy(rbuf, buf, offset);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
target_emulate_request_sense(struct se_cmd *cmd)
|
|
{
|
|
unsigned char *cdb = cmd->t_task->t_task_cdb;
|
|
unsigned char *buf = cmd->t_task->t_task_buf;
|
|
u8 ua_asc = 0, ua_ascq = 0;
|
|
|
|
if (cdb[1] & 0x01) {
|
|
printk(KERN_ERR "REQUEST_SENSE description emulation not"
|
|
" supported\n");
|
|
return PYX_TRANSPORT_INVALID_CDB_FIELD;
|
|
}
|
|
if (!(core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq))) {
|
|
/*
|
|
* CURRENT ERROR, UNIT ATTENTION
|
|
*/
|
|
buf[0] = 0x70;
|
|
buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION;
|
|
/*
|
|
* Make sure request data length is enough for additional
|
|
* sense data.
|
|
*/
|
|
if (cmd->data_length <= 18) {
|
|
buf[7] = 0x00;
|
|
return 0;
|
|
}
|
|
/*
|
|
* The Additional Sense Code (ASC) from the UNIT ATTENTION
|
|
*/
|
|
buf[SPC_ASC_KEY_OFFSET] = ua_asc;
|
|
buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq;
|
|
buf[7] = 0x0A;
|
|
} else {
|
|
/*
|
|
* CURRENT ERROR, NO SENSE
|
|
*/
|
|
buf[0] = 0x70;
|
|
buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE;
|
|
/*
|
|
* Make sure request data length is enough for additional
|
|
* sense data.
|
|
*/
|
|
if (cmd->data_length <= 18) {
|
|
buf[7] = 0x00;
|
|
return 0;
|
|
}
|
|
/*
|
|
* NO ADDITIONAL SENSE INFORMATION
|
|
*/
|
|
buf[SPC_ASC_KEY_OFFSET] = 0x00;
|
|
buf[7] = 0x0A;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
|
|
* Note this is not used for TCM/pSCSI passthrough
|
|
*/
|
|
static int
|
|
target_emulate_unmap(struct se_task *task)
|
|
{
|
|
struct se_cmd *cmd = TASK_CMD(task);
|
|
struct se_device *dev = SE_DEV(cmd);
|
|
unsigned char *buf = cmd->t_task->t_task_buf, *ptr = NULL;
|
|
unsigned char *cdb = &cmd->t_task->t_task_cdb[0];
|
|
sector_t lba;
|
|
unsigned int size = cmd->data_length, range;
|
|
int ret, offset;
|
|
unsigned short dl, bd_dl;
|
|
|
|
/* First UNMAP block descriptor starts at 8 byte offset */
|
|
offset = 8;
|
|
size -= 8;
|
|
dl = get_unaligned_be16(&cdb[0]);
|
|
bd_dl = get_unaligned_be16(&cdb[2]);
|
|
ptr = &buf[offset];
|
|
printk(KERN_INFO "UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu"
|
|
" ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr);
|
|
|
|
while (size) {
|
|
lba = get_unaligned_be64(&ptr[0]);
|
|
range = get_unaligned_be32(&ptr[8]);
|
|
printk(KERN_INFO "UNMAP: Using lba: %llu and range: %u\n",
|
|
(unsigned long long)lba, range);
|
|
|
|
ret = dev->transport->do_discard(dev, lba, range);
|
|
if (ret < 0) {
|
|
printk(KERN_ERR "blkdev_issue_discard() failed: %d\n",
|
|
ret);
|
|
return -1;
|
|
}
|
|
|
|
ptr += 16;
|
|
size -= 16;
|
|
}
|
|
|
|
task->task_scsi_status = GOOD;
|
|
transport_complete_task(task, 1);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
|
|
* Note this is not used for TCM/pSCSI passthrough
|
|
*/
|
|
static int
|
|
target_emulate_write_same(struct se_task *task)
|
|
{
|
|
struct se_cmd *cmd = TASK_CMD(task);
|
|
struct se_device *dev = SE_DEV(cmd);
|
|
sector_t lba = cmd->t_task->t_task_lba;
|
|
unsigned int range;
|
|
int ret;
|
|
|
|
range = (cmd->data_length / DEV_ATTRIB(dev)->block_size);
|
|
|
|
printk(KERN_INFO "WRITE_SAME UNMAP: LBA: %llu Range: %u\n",
|
|
(unsigned long long)lba, range);
|
|
|
|
ret = dev->transport->do_discard(dev, lba, range);
|
|
if (ret < 0) {
|
|
printk(KERN_INFO "blkdev_issue_discard() failed for WRITE_SAME\n");
|
|
return -1;
|
|
}
|
|
|
|
task->task_scsi_status = GOOD;
|
|
transport_complete_task(task, 1);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
transport_emulate_control_cdb(struct se_task *task)
|
|
{
|
|
struct se_cmd *cmd = TASK_CMD(task);
|
|
struct se_device *dev = SE_DEV(cmd);
|
|
unsigned short service_action;
|
|
int ret = 0;
|
|
|
|
switch (cmd->t_task->t_task_cdb[0]) {
|
|
case INQUIRY:
|
|
ret = target_emulate_inquiry(cmd);
|
|
break;
|
|
case READ_CAPACITY:
|
|
ret = target_emulate_readcapacity(cmd);
|
|
break;
|
|
case MODE_SENSE:
|
|
ret = target_emulate_modesense(cmd, 0);
|
|
break;
|
|
case MODE_SENSE_10:
|
|
ret = target_emulate_modesense(cmd, 1);
|
|
break;
|
|
case SERVICE_ACTION_IN:
|
|
switch (cmd->t_task->t_task_cdb[1] & 0x1f) {
|
|
case SAI_READ_CAPACITY_16:
|
|
ret = target_emulate_readcapacity_16(cmd);
|
|
break;
|
|
default:
|
|
printk(KERN_ERR "Unsupported SA: 0x%02x\n",
|
|
cmd->t_task->t_task_cdb[1] & 0x1f);
|
|
return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
|
|
}
|
|
break;
|
|
case REQUEST_SENSE:
|
|
ret = target_emulate_request_sense(cmd);
|
|
break;
|
|
case UNMAP:
|
|
if (!dev->transport->do_discard) {
|
|
printk(KERN_ERR "UNMAP emulation not supported for: %s\n",
|
|
dev->transport->name);
|
|
return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
|
|
}
|
|
ret = target_emulate_unmap(task);
|
|
break;
|
|
case WRITE_SAME_16:
|
|
if (!dev->transport->do_discard) {
|
|
printk(KERN_ERR "WRITE_SAME_16 emulation not supported"
|
|
" for: %s\n", dev->transport->name);
|
|
return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
|
|
}
|
|
ret = target_emulate_write_same(task);
|
|
break;
|
|
case VARIABLE_LENGTH_CMD:
|
|
service_action =
|
|
get_unaligned_be16(&cmd->t_task->t_task_cdb[8]);
|
|
switch (service_action) {
|
|
case WRITE_SAME_32:
|
|
if (!dev->transport->do_discard) {
|
|
printk(KERN_ERR "WRITE_SAME_32 SA emulation not"
|
|
" supported for: %s\n",
|
|
dev->transport->name);
|
|
return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
|
|
}
|
|
ret = target_emulate_write_same(task);
|
|
break;
|
|
default:
|
|
printk(KERN_ERR "Unsupported VARIABLE_LENGTH_CMD SA:"
|
|
" 0x%02x\n", service_action);
|
|
break;
|
|
}
|
|
break;
|
|
case SYNCHRONIZE_CACHE:
|
|
case 0x91: /* SYNCHRONIZE_CACHE_16: */
|
|
if (!dev->transport->do_sync_cache) {
|
|
printk(KERN_ERR
|
|
"SYNCHRONIZE_CACHE emulation not supported"
|
|
" for: %s\n", dev->transport->name);
|
|
return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
|
|
}
|
|
dev->transport->do_sync_cache(task);
|
|
break;
|
|
case ALLOW_MEDIUM_REMOVAL:
|
|
case ERASE:
|
|
case REZERO_UNIT:
|
|
case SEEK_10:
|
|
case SPACE:
|
|
case START_STOP:
|
|
case TEST_UNIT_READY:
|
|
case VERIFY:
|
|
case WRITE_FILEMARKS:
|
|
break;
|
|
default:
|
|
printk(KERN_ERR "Unsupported SCSI Opcode: 0x%02x for %s\n",
|
|
cmd->t_task->t_task_cdb[0], dev->transport->name);
|
|
return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
|
|
}
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
task->task_scsi_status = GOOD;
|
|
transport_complete_task(task, 1);
|
|
|
|
return PYX_TRANSPORT_SENT_TO_TRANSPORT;
|
|
}
|