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![Roland Dreier](/assets/img/avatar_default.png)
se_dev_attrib.max_sectors currently has two independent meanings: - It is reported in the block limits VPD page as the maximum transfer length, ie the largest IO that the front-end (fabric) can handle. Also the target core doesn't enforce this maximum transfer length. - It is used to hold the size of the largest IO that the back-end can handle, so we know when to split SCSI commands into multiple tasks. Fix this by adding a new se_dev_attrib.fabric_max_sectors to hold the maximum transfer length, and checking incoming IOs against that limit. Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
1201 lines
33 KiB
C
1201 lines
33 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 <linux/kernel.h>
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#include <linux/module.h>
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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_backend.h>
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#include <target/target_core_fabric.h>
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#include "target_core_internal.h"
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#include "target_core_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, char *buf)
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{
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struct se_lun *lun = cmd->se_lun;
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struct se_device *dev = cmd->se_dev;
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/* Set RMB (removable media) for tape devices */
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if (dev->transport->get_device_type(dev) == 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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* NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2
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*
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* SPC4 says:
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* A RESPONSE DATA FORMAT field set to 2h indicates that the
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* standard INQUIRY data is in the format defined in this
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* standard. Response data format values less than 2h are
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* obsolete. Response data format values greater than 2h are
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* reserved.
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*/
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buf[3] = 2;
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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 (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED)
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target_fill_alua_data(lun->lun_sep, buf);
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buf[7] = 0x2; /* CmdQue=1 */
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snprintf(&buf[8], 8, "LIO-ORG");
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snprintf(&buf[16], 16, "%s", dev->se_sub_dev->t10_wwn.model);
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snprintf(&buf[32], 4, "%s", dev->se_sub_dev->t10_wwn.revision);
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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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/* 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 = cmd->se_dev;
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u16 len = 0;
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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 = strlen(dev->se_sub_dev->t10_wwn.unit_serial);
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unit_serial_len++; /* For NULL Terminator */
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len += sprintf(&buf[4], "%s",
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dev->se_sub_dev->t10_wwn.unit_serial);
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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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static void
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target_parse_naa_6h_vendor_specific(struct se_device *dev, unsigned char *buf)
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{
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unsigned char *p = &dev->se_sub_dev->t10_wwn.unit_serial[0];
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int cnt;
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bool next = true;
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/*
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* Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on
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* byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field
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* format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION
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* to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL
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* NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure
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* per device uniqeness.
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*/
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for (cnt = 0; *p && cnt < 13; p++) {
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int val = hex_to_bin(*p);
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if (val < 0)
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continue;
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if (next) {
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next = false;
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buf[cnt++] |= val;
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} else {
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next = true;
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buf[cnt] = val << 4;
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}
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}
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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 = cmd->se_dev;
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struct se_lun *lun = cmd->se_lun;
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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 *prod = &dev->se_sub_dev->t10_wwn.model[0];
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u32 prod_len;
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u32 unit_serial_len, off = 0;
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u16 len = 0, id_len;
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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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/* CODE SET == Binary */
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buf[off++] = 0x1;
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/* Set ASSOCIATION == 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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target_parse_naa_6h_vendor_specific(dev, &buf[off]);
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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->se_sub_dev->t10_wwn.unit_serial[0]);
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unit_serial_len++; /* For NULL Terminator */
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id_len += sprintf(&buf[off+12], "%s:%s", prod,
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&dev->se_sub_dev->t10_wwn.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(&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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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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buf[off] =
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(tpg->se_tpg_tfo->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 ASSOCIATION == 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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if (dev->se_sub_dev->t10_alua.alua_type !=
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SPC3_ALUA_EMULATED)
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goto check_scsi_name;
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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->se_tpg_tfo->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 ASSOCIATION == 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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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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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
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* section 7.5.1 Table 362
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*/
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check_scsi_name:
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scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg));
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/* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */
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scsi_name_len += 10;
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/* Check for 4-byte padding */
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padding = ((-scsi_name_len) & 3);
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if (padding != 0)
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scsi_name_len += padding;
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/* Header size + Designation descriptor */
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scsi_name_len += 4;
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buf[off] =
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(tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
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buf[off++] |= 0x3; /* CODE SET == UTF-8 */
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buf[off] = 0x80; /* Set PIV=1 */
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/* Set ASSOCIATION == target port: 01b */
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buf[off] |= 0x10;
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/* DESIGNATOR TYPE == SCSI name string */
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buf[off++] |= 0x8;
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off += 2; /* Skip over Reserved and length */
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/*
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* SCSI name string identifer containing, $FABRIC_MOD
|
|
* dependent information. For LIO-Target and iSCSI
|
|
* Target Port, this means "<iSCSI name>,t,0x<TPGT> in
|
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* UTF-8 encoding.
|
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*/
|
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tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg);
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scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x",
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tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt);
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scsi_name_len += 1 /* Include NULL terminator */;
|
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/*
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* The null-terminated, null-padded (see 4.4.2) SCSI
|
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* NAME STRING field contains a UTF-8 format string.
|
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* 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
|
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* of four.
|
|
*/
|
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if (padding)
|
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scsi_name_len += padding;
|
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|
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buf[off-1] = scsi_name_len;
|
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off += scsi_name_len;
|
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/* Header size + Designation descriptor */
|
|
len += (scsi_name_len + 4);
|
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}
|
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buf[2] = ((len >> 8) & 0xff);
|
|
buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */
|
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return 0;
|
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}
|
|
|
|
/* Extended INQUIRY Data VPD Page */
|
|
static int
|
|
target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf)
|
|
{
|
|
buf[3] = 0x3c;
|
|
/* Set HEADSUP, ORDSUP, SIMPSUP */
|
|
buf[5] = 0x07;
|
|
|
|
/* If WriteCache emulation is enabled, set V_SUP */
|
|
if (cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0)
|
|
buf[6] = 0x01;
|
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return 0;
|
|
}
|
|
|
|
/* Block Limits VPD page */
|
|
static int
|
|
target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
|
|
{
|
|
struct se_device *dev = cmd->se_dev;
|
|
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->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws)
|
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have_tp = 1;
|
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|
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buf[0] = dev->transport->get_device_type(dev);
|
|
buf[3] = have_tp ? 0x3c : 0x10;
|
|
|
|
/* Set WSNZ to 1 */
|
|
buf[4] = 0x01;
|
|
|
|
/*
|
|
* Set OPTIMAL TRANSFER LENGTH GRANULARITY
|
|
*/
|
|
put_unaligned_be16(1, &buf[6]);
|
|
|
|
/*
|
|
* Set MAXIMUM TRANSFER LENGTH
|
|
*/
|
|
put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.fabric_max_sectors, &buf[8]);
|
|
|
|
/*
|
|
* Set OPTIMAL TRANSFER LENGTH
|
|
*/
|
|
put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.optimal_sectors, &buf[12]);
|
|
|
|
/*
|
|
* Exit now if we don't support TP.
|
|
*/
|
|
if (!have_tp)
|
|
return 0;
|
|
|
|
/*
|
|
* Set MAXIMUM UNMAP LBA COUNT
|
|
*/
|
|
put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count, &buf[20]);
|
|
|
|
/*
|
|
* Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT
|
|
*/
|
|
put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count,
|
|
&buf[24]);
|
|
|
|
/*
|
|
* Set OPTIMAL UNMAP GRANULARITY
|
|
*/
|
|
put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity, &buf[28]);
|
|
|
|
/*
|
|
* UNMAP GRANULARITY ALIGNMENT
|
|
*/
|
|
put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment,
|
|
&buf[32]);
|
|
if (dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment != 0)
|
|
buf[32] |= 0x80; /* Set the UGAVALID bit */
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Block Device Characteristics VPD page */
|
|
static int
|
|
target_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf)
|
|
{
|
|
struct se_device *dev = cmd->se_dev;
|
|
|
|
buf[0] = dev->transport->get_device_type(dev);
|
|
buf[3] = 0x3c;
|
|
buf[5] = dev->se_sub_dev->se_dev_attrib.is_nonrot ? 1 : 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Thin Provisioning VPD */
|
|
static int
|
|
target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf)
|
|
{
|
|
struct se_device *dev = cmd->se_dev;
|
|
|
|
/*
|
|
* 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);
|
|
|
|
/*
|
|
* 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->se_sub_dev->se_dev_attrib.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->se_sub_dev->se_dev_attrib.emulate_tpws != 0)
|
|
buf[5] |= 0x40;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf);
|
|
|
|
static struct {
|
|
uint8_t page;
|
|
int (*emulate)(struct se_cmd *, unsigned char *);
|
|
} evpd_handlers[] = {
|
|
{ .page = 0x00, .emulate = target_emulate_evpd_00 },
|
|
{ .page = 0x80, .emulate = target_emulate_evpd_80 },
|
|
{ .page = 0x83, .emulate = target_emulate_evpd_83 },
|
|
{ .page = 0x86, .emulate = target_emulate_evpd_86 },
|
|
{ .page = 0xb0, .emulate = target_emulate_evpd_b0 },
|
|
{ .page = 0xb1, .emulate = target_emulate_evpd_b1 },
|
|
{ .page = 0xb2, .emulate = target_emulate_evpd_b2 },
|
|
};
|
|
|
|
/* supported vital product data pages */
|
|
static int
|
|
target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf)
|
|
{
|
|
int p;
|
|
|
|
/*
|
|
* Only report the INQUIRY EVPD=1 pages after a valid NAA
|
|
* Registered Extended LUN WWN has been set via ConfigFS
|
|
* during device creation/restart.
|
|
*/
|
|
if (cmd->se_dev->se_sub_dev->su_dev_flags &
|
|
SDF_EMULATED_VPD_UNIT_SERIAL) {
|
|
buf[3] = ARRAY_SIZE(evpd_handlers);
|
|
for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p)
|
|
buf[p + 4] = evpd_handlers[p].page;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int target_emulate_inquiry(struct se_task *task)
|
|
{
|
|
struct se_cmd *cmd = task->task_se_cmd;
|
|
struct se_device *dev = cmd->se_dev;
|
|
struct se_portal_group *tpg = cmd->se_lun->lun_sep->sep_tpg;
|
|
unsigned char *buf, *map_buf;
|
|
unsigned char *cdb = cmd->t_task_cdb;
|
|
int p, ret;
|
|
|
|
map_buf = transport_kmap_data_sg(cmd);
|
|
/*
|
|
* If SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC is not set, then we
|
|
* know we actually allocated a full page. Otherwise, if the
|
|
* data buffer is too small, allocate a temporary buffer so we
|
|
* don't have to worry about overruns in all our INQUIRY
|
|
* emulation handling.
|
|
*/
|
|
if (cmd->data_length < SE_INQUIRY_BUF &&
|
|
(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC)) {
|
|
buf = kzalloc(SE_INQUIRY_BUF, GFP_KERNEL);
|
|
if (!buf) {
|
|
transport_kunmap_data_sg(cmd);
|
|
cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
|
|
return -ENOMEM;
|
|
}
|
|
} else {
|
|
buf = map_buf;
|
|
}
|
|
|
|
if (dev == tpg->tpg_virt_lun0.lun_se_dev)
|
|
buf[0] = 0x3f; /* Not connected */
|
|
else
|
|
buf[0] = dev->transport->get_device_type(dev);
|
|
|
|
if (!(cdb[1] & 0x1)) {
|
|
if (cdb[2]) {
|
|
pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n",
|
|
cdb[2]);
|
|
cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
ret = target_emulate_inquiry_std(cmd, buf);
|
|
goto out;
|
|
}
|
|
|
|
for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) {
|
|
if (cdb[2] == evpd_handlers[p].page) {
|
|
buf[1] = cdb[2];
|
|
ret = evpd_handlers[p].emulate(cmd, buf);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]);
|
|
cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
|
|
ret = -EINVAL;
|
|
|
|
out:
|
|
if (buf != map_buf) {
|
|
memcpy(map_buf, buf, cmd->data_length);
|
|
kfree(buf);
|
|
}
|
|
transport_kunmap_data_sg(cmd);
|
|
|
|
if (!ret) {
|
|
task->task_scsi_status = GOOD;
|
|
transport_complete_task(task, 1);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int target_emulate_readcapacity(struct se_task *task)
|
|
{
|
|
struct se_cmd *cmd = task->task_se_cmd;
|
|
struct se_device *dev = cmd->se_dev;
|
|
unsigned char *buf;
|
|
unsigned long long blocks_long = dev->transport->get_blocks(dev);
|
|
u32 blocks;
|
|
|
|
if (blocks_long >= 0x00000000ffffffff)
|
|
blocks = 0xffffffff;
|
|
else
|
|
blocks = (u32)blocks_long;
|
|
|
|
buf = transport_kmap_data_sg(cmd);
|
|
|
|
buf[0] = (blocks >> 24) & 0xff;
|
|
buf[1] = (blocks >> 16) & 0xff;
|
|
buf[2] = (blocks >> 8) & 0xff;
|
|
buf[3] = blocks & 0xff;
|
|
buf[4] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff;
|
|
buf[5] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff;
|
|
buf[6] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff;
|
|
buf[7] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff;
|
|
/*
|
|
* Set max 32-bit blocks to signal SERVICE ACTION READ_CAPACITY_16
|
|
*/
|
|
if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws)
|
|
put_unaligned_be32(0xFFFFFFFF, &buf[0]);
|
|
|
|
transport_kunmap_data_sg(cmd);
|
|
|
|
task->task_scsi_status = GOOD;
|
|
transport_complete_task(task, 1);
|
|
return 0;
|
|
}
|
|
|
|
int target_emulate_readcapacity_16(struct se_task *task)
|
|
{
|
|
struct se_cmd *cmd = task->task_se_cmd;
|
|
struct se_device *dev = cmd->se_dev;
|
|
unsigned char *buf;
|
|
unsigned long long blocks = dev->transport->get_blocks(dev);
|
|
|
|
buf = transport_kmap_data_sg(cmd);
|
|
|
|
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->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff;
|
|
buf[9] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff;
|
|
buf[10] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff;
|
|
buf[11] = dev->se_sub_dev->se_dev_attrib.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->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws)
|
|
buf[14] = 0x80;
|
|
|
|
transport_kunmap_data_sg(cmd);
|
|
|
|
task->task_scsi_status = GOOD;
|
|
transport_complete_task(task, 1);
|
|
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 spc4r23, 7.4.7 Control mode page
|
|
*
|
|
* The QUEUE ALGORITHM MODIFIER field (see table 368) specifies
|
|
* restrictions on the algorithm used for reordering commands
|
|
* having the SIMPLE task attribute (see SAM-4).
|
|
*
|
|
* Table 368 -- QUEUE ALGORITHM MODIFIER field
|
|
* Code Description
|
|
* 0h Restricted reordering
|
|
* 1h Unrestricted reordering allowed
|
|
* 2h to 7h Reserved
|
|
* 8h to Fh Vendor specific
|
|
*
|
|
* A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that
|
|
* the device server shall order the processing sequence of commands
|
|
* having the SIMPLE task attribute such that data integrity is maintained
|
|
* for that I_T nexus (i.e., if the transmission of new SCSI transport protocol
|
|
* requests is halted at any time, the final value of all data observable
|
|
* on the medium shall be the same as if all the commands had been processed
|
|
* with the ORDERED task attribute).
|
|
*
|
|
* A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the
|
|
* device server may reorder the processing sequence of commands having the
|
|
* SIMPLE task attribute in any manner. Any data integrity exposures related to
|
|
* command sequence order shall be explicitly handled by the application client
|
|
* through the selection of appropriate ommands and task attributes.
|
|
*/
|
|
p[3] = (dev->se_sub_dev->se_dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10;
|
|
/*
|
|
* 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->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 :
|
|
(dev->se_sub_dev->se_dev_attrib.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->se_sub_dev->se_dev_attrib.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->se_sub_dev->se_dev_attrib.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;
|
|
}
|
|
}
|
|
|
|
int target_emulate_modesense(struct se_task *task)
|
|
{
|
|
struct se_cmd *cmd = task->task_se_cmd;
|
|
struct se_device *dev = cmd->se_dev;
|
|
char *cdb = cmd->t_task_cdb;
|
|
unsigned char *rbuf;
|
|
int type = dev->transport->get_device_type(dev);
|
|
int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10);
|
|
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:
|
|
pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n",
|
|
cdb[2] & 0x3f, cdb[3]);
|
|
cmd->scsi_sense_reason = TCM_UNKNOWN_MODE_PAGE;
|
|
return -EINVAL;
|
|
}
|
|
offset += length;
|
|
|
|
if (ten) {
|
|
offset -= 2;
|
|
buf[0] = (offset >> 8) & 0xff;
|
|
buf[1] = offset & 0xff;
|
|
|
|
if ((cmd->se_lun->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->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) &&
|
|
(dev->se_sub_dev->se_dev_attrib.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 ((cmd->se_lun->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->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) &&
|
|
(dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0))
|
|
target_modesense_dpofua(&buf[2], type);
|
|
|
|
if ((offset + 1) > cmd->data_length)
|
|
offset = cmd->data_length;
|
|
}
|
|
|
|
rbuf = transport_kmap_data_sg(cmd);
|
|
memcpy(rbuf, buf, offset);
|
|
transport_kunmap_data_sg(cmd);
|
|
|
|
task->task_scsi_status = GOOD;
|
|
transport_complete_task(task, 1);
|
|
return 0;
|
|
}
|
|
|
|
int target_emulate_request_sense(struct se_task *task)
|
|
{
|
|
struct se_cmd *cmd = task->task_se_cmd;
|
|
unsigned char *cdb = cmd->t_task_cdb;
|
|
unsigned char *buf;
|
|
u8 ua_asc = 0, ua_ascq = 0;
|
|
int err = 0;
|
|
|
|
if (cdb[1] & 0x01) {
|
|
pr_err("REQUEST_SENSE description emulation not"
|
|
" supported\n");
|
|
cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
|
|
return -ENOSYS;
|
|
}
|
|
|
|
buf = transport_kmap_data_sg(cmd);
|
|
|
|
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;
|
|
|
|
if (cmd->data_length < 18) {
|
|
buf[7] = 0x00;
|
|
err = -EINVAL;
|
|
goto end;
|
|
}
|
|
/*
|
|
* 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;
|
|
|
|
if (cmd->data_length < 18) {
|
|
buf[7] = 0x00;
|
|
err = -EINVAL;
|
|
goto end;
|
|
}
|
|
/*
|
|
* NO ADDITIONAL SENSE INFORMATION
|
|
*/
|
|
buf[SPC_ASC_KEY_OFFSET] = 0x00;
|
|
buf[7] = 0x0A;
|
|
}
|
|
|
|
end:
|
|
transport_kunmap_data_sg(cmd);
|
|
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
|
|
*/
|
|
int target_emulate_unmap(struct se_task *task)
|
|
{
|
|
struct se_cmd *cmd = task->task_se_cmd;
|
|
struct se_device *dev = cmd->se_dev;
|
|
unsigned char *buf, *ptr = NULL;
|
|
unsigned char *cdb = &cmd->t_task_cdb[0];
|
|
sector_t lba;
|
|
unsigned int size = cmd->data_length, range;
|
|
int ret = 0, offset;
|
|
unsigned short dl, bd_dl;
|
|
|
|
if (!dev->transport->do_discard) {
|
|
pr_err("UNMAP emulation not supported for: %s\n",
|
|
dev->transport->name);
|
|
cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
|
|
return -ENOSYS;
|
|
}
|
|
|
|
/* 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]);
|
|
|
|
buf = transport_kmap_data_sg(cmd);
|
|
|
|
ptr = &buf[offset];
|
|
pr_debug("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]);
|
|
pr_debug("UNMAP: Using lba: %llu and range: %u\n",
|
|
(unsigned long long)lba, range);
|
|
|
|
ret = dev->transport->do_discard(dev, lba, range);
|
|
if (ret < 0) {
|
|
pr_err("blkdev_issue_discard() failed: %d\n",
|
|
ret);
|
|
goto err;
|
|
}
|
|
|
|
ptr += 16;
|
|
size -= 16;
|
|
}
|
|
|
|
err:
|
|
transport_kunmap_data_sg(cmd);
|
|
if (!ret) {
|
|
task->task_scsi_status = GOOD;
|
|
transport_complete_task(task, 1);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
|
|
* Note this is not used for TCM/pSCSI passthrough
|
|
*/
|
|
int target_emulate_write_same(struct se_task *task)
|
|
{
|
|
struct se_cmd *cmd = task->task_se_cmd;
|
|
struct se_device *dev = cmd->se_dev;
|
|
sector_t range;
|
|
sector_t lba = cmd->t_task_lba;
|
|
u32 num_blocks;
|
|
int ret;
|
|
|
|
if (!dev->transport->do_discard) {
|
|
pr_err("WRITE_SAME emulation not supported"
|
|
" for: %s\n", dev->transport->name);
|
|
cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
|
|
return -ENOSYS;
|
|
}
|
|
|
|
if (cmd->t_task_cdb[0] == WRITE_SAME)
|
|
num_blocks = get_unaligned_be16(&cmd->t_task_cdb[7]);
|
|
else if (cmd->t_task_cdb[0] == WRITE_SAME_16)
|
|
num_blocks = get_unaligned_be32(&cmd->t_task_cdb[10]);
|
|
else /* WRITE_SAME_32 via VARIABLE_LENGTH_CMD */
|
|
num_blocks = get_unaligned_be32(&cmd->t_task_cdb[28]);
|
|
|
|
/*
|
|
* Use the explicit range when non zero is supplied, otherwise calculate
|
|
* the remaining range based on ->get_blocks() - starting LBA.
|
|
*/
|
|
if (num_blocks != 0)
|
|
range = num_blocks;
|
|
else
|
|
range = (dev->transport->get_blocks(dev) - lba);
|
|
|
|
pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n",
|
|
(unsigned long long)lba, (unsigned long long)range);
|
|
|
|
ret = dev->transport->do_discard(dev, lba, range);
|
|
if (ret < 0) {
|
|
pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n");
|
|
return ret;
|
|
}
|
|
|
|
task->task_scsi_status = GOOD;
|
|
transport_complete_task(task, 1);
|
|
return 0;
|
|
}
|
|
|
|
int target_emulate_synchronize_cache(struct se_task *task)
|
|
{
|
|
struct se_device *dev = task->task_se_cmd->se_dev;
|
|
struct se_cmd *cmd = task->task_se_cmd;
|
|
|
|
if (!dev->transport->do_sync_cache) {
|
|
pr_err("SYNCHRONIZE_CACHE emulation not supported"
|
|
" for: %s\n", dev->transport->name);
|
|
cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
|
|
return -ENOSYS;
|
|
}
|
|
|
|
dev->transport->do_sync_cache(task);
|
|
return 0;
|
|
}
|
|
|
|
int target_emulate_noop(struct se_task *task)
|
|
{
|
|
task->task_scsi_status = GOOD;
|
|
transport_complete_task(task, 1);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Write a CDB into @cdb that is based on the one the intiator sent us,
|
|
* but updated to only cover the sectors that the current task handles.
|
|
*/
|
|
void target_get_task_cdb(struct se_task *task, unsigned char *cdb)
|
|
{
|
|
struct se_cmd *cmd = task->task_se_cmd;
|
|
unsigned int cdb_len = scsi_command_size(cmd->t_task_cdb);
|
|
|
|
memcpy(cdb, cmd->t_task_cdb, cdb_len);
|
|
if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) {
|
|
unsigned long long lba = task->task_lba;
|
|
u32 sectors = task->task_sectors;
|
|
|
|
switch (cdb_len) {
|
|
case 6:
|
|
/* 21-bit LBA and 8-bit sectors */
|
|
cdb[1] = (lba >> 16) & 0x1f;
|
|
cdb[2] = (lba >> 8) & 0xff;
|
|
cdb[3] = lba & 0xff;
|
|
cdb[4] = sectors & 0xff;
|
|
break;
|
|
case 10:
|
|
/* 32-bit LBA and 16-bit sectors */
|
|
put_unaligned_be32(lba, &cdb[2]);
|
|
put_unaligned_be16(sectors, &cdb[7]);
|
|
break;
|
|
case 12:
|
|
/* 32-bit LBA and 32-bit sectors */
|
|
put_unaligned_be32(lba, &cdb[2]);
|
|
put_unaligned_be32(sectors, &cdb[6]);
|
|
break;
|
|
case 16:
|
|
/* 64-bit LBA and 32-bit sectors */
|
|
put_unaligned_be64(lba, &cdb[2]);
|
|
put_unaligned_be32(sectors, &cdb[10]);
|
|
break;
|
|
case 32:
|
|
/* 64-bit LBA and 32-bit sectors, extended CDB */
|
|
put_unaligned_be64(lba, &cdb[12]);
|
|
put_unaligned_be32(sectors, &cdb[28]);
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(target_get_task_cdb);
|