target_core_tmr.o \
target_core_tpg.o \
target_core_transport.o \
- target_core_cdb.o \
target_core_sbc.o \
target_core_spc.o \
target_core_ua.o \
+++ /dev/null
-/*
- * CDB emulation for non-READ/WRITE commands.
- *
- * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc.
- * Copyright (c) 2005, 2006, 2007 SBE, Inc.
- * Copyright (c) 2007-2010 Rising Tide Systems
- * Copyright (c) 2008-2010 Linux-iSCSI.org
- *
- * Nicholas A. Bellinger <nab@kernel.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <asm/unaligned.h>
-#include <scsi/scsi.h>
-
-#include <target/target_core_base.h>
-#include <target/target_core_backend.h>
-#include <target/target_core_fabric.h>
-
-#include "target_core_internal.h"
-#include "target_core_ua.h"
-
-static void
-target_fill_alua_data(struct se_port *port, unsigned char *buf)
-{
- struct t10_alua_tg_pt_gp *tg_pt_gp;
- struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
-
- /*
- * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS.
- */
- buf[5] = 0x80;
-
- /*
- * Set TPGS field for explict and/or implict ALUA access type
- * and opteration.
- *
- * See spc4r17 section 6.4.2 Table 135
- */
- if (!port)
- return;
- tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
- if (!tg_pt_gp_mem)
- return;
-
- spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
- tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
- if (tg_pt_gp)
- buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type;
- spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
-}
-
-static int
-target_emulate_inquiry_std(struct se_cmd *cmd, char *buf)
-{
- struct se_lun *lun = cmd->se_lun;
- struct se_device *dev = cmd->se_dev;
-
- /* Set RMB (removable media) for tape devices */
- if (dev->transport->get_device_type(dev) == TYPE_TAPE)
- buf[1] = 0x80;
-
- buf[2] = dev->transport->get_device_rev(dev);
-
- /*
- * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2
- *
- * SPC4 says:
- * A RESPONSE DATA FORMAT field set to 2h indicates that the
- * standard INQUIRY data is in the format defined in this
- * standard. Response data format values less than 2h are
- * obsolete. Response data format values greater than 2h are
- * reserved.
- */
- buf[3] = 2;
-
- /*
- * Enable SCCS and TPGS fields for Emulated ALUA
- */
- if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED)
- target_fill_alua_data(lun->lun_sep, buf);
-
- buf[7] = 0x2; /* CmdQue=1 */
-
- snprintf(&buf[8], 8, "LIO-ORG");
- snprintf(&buf[16], 16, "%s", dev->se_sub_dev->t10_wwn.model);
- snprintf(&buf[32], 4, "%s", dev->se_sub_dev->t10_wwn.revision);
- buf[4] = 31; /* Set additional length to 31 */
-
- return 0;
-}
-
-/* unit serial number */
-static int
-target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf)
-{
- struct se_device *dev = cmd->se_dev;
- u16 len = 0;
-
- if (dev->se_sub_dev->su_dev_flags &
- SDF_EMULATED_VPD_UNIT_SERIAL) {
- u32 unit_serial_len;
-
- unit_serial_len = strlen(dev->se_sub_dev->t10_wwn.unit_serial);
- unit_serial_len++; /* For NULL Terminator */
-
- len += sprintf(&buf[4], "%s",
- dev->se_sub_dev->t10_wwn.unit_serial);
- len++; /* Extra Byte for NULL Terminator */
- buf[3] = len;
- }
- return 0;
-}
-
-static void
-target_parse_naa_6h_vendor_specific(struct se_device *dev, unsigned char *buf)
-{
- unsigned char *p = &dev->se_sub_dev->t10_wwn.unit_serial[0];
- int cnt;
- bool next = true;
-
- /*
- * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on
- * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field
- * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION
- * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL
- * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure
- * per device uniqeness.
- */
- for (cnt = 0; *p && cnt < 13; p++) {
- int val = hex_to_bin(*p);
-
- if (val < 0)
- continue;
-
- if (next) {
- next = false;
- buf[cnt++] |= val;
- } else {
- next = true;
- buf[cnt] = val << 4;
- }
- }
-}
-
-/*
- * Device identification VPD, for a complete list of
- * DESIGNATOR TYPEs see spc4r17 Table 459.
- */
-static int
-target_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf)
-{
- struct se_device *dev = cmd->se_dev;
- struct se_lun *lun = cmd->se_lun;
- struct se_port *port = NULL;
- struct se_portal_group *tpg = NULL;
- struct t10_alua_lu_gp_member *lu_gp_mem;
- struct t10_alua_tg_pt_gp *tg_pt_gp;
- struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
- unsigned char *prod = &dev->se_sub_dev->t10_wwn.model[0];
- u32 prod_len;
- u32 unit_serial_len, off = 0;
- u16 len = 0, id_len;
-
- off = 4;
-
- /*
- * NAA IEEE Registered Extended Assigned designator format, see
- * spc4r17 section 7.7.3.6.5
- *
- * We depend upon a target_core_mod/ConfigFS provided
- * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial
- * value in order to return the NAA id.
- */
- if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL))
- goto check_t10_vend_desc;
-
- /* CODE SET == Binary */
- buf[off++] = 0x1;
-
- /* Set ASSOCIATION == addressed logical unit: 0)b */
- buf[off] = 0x00;
-
- /* Identifier/Designator type == NAA identifier */
- buf[off++] |= 0x3;
- off++;
-
- /* Identifier/Designator length */
- buf[off++] = 0x10;
-
- /*
- * Start NAA IEEE Registered Extended Identifier/Designator
- */
- buf[off++] = (0x6 << 4);
-
- /*
- * Use OpenFabrics IEEE Company ID: 00 14 05
- */
- buf[off++] = 0x01;
- buf[off++] = 0x40;
- buf[off] = (0x5 << 4);
-
- /*
- * Return ConfigFS Unit Serial Number information for
- * VENDOR_SPECIFIC_IDENTIFIER and
- * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION
- */
- target_parse_naa_6h_vendor_specific(dev, &buf[off]);
-
- len = 20;
- off = (len + 4);
-
-check_t10_vend_desc:
- /*
- * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4
- */
- id_len = 8; /* For Vendor field */
- prod_len = 4; /* For VPD Header */
- prod_len += 8; /* For Vendor field */
- prod_len += strlen(prod);
- prod_len++; /* For : */
-
- if (dev->se_sub_dev->su_dev_flags &
- SDF_EMULATED_VPD_UNIT_SERIAL) {
- unit_serial_len =
- strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]);
- unit_serial_len++; /* For NULL Terminator */
-
- id_len += sprintf(&buf[off+12], "%s:%s", prod,
- &dev->se_sub_dev->t10_wwn.unit_serial[0]);
- }
- buf[off] = 0x2; /* ASCII */
- buf[off+1] = 0x1; /* T10 Vendor ID */
- buf[off+2] = 0x0;
- memcpy(&buf[off+4], "LIO-ORG", 8);
- /* Extra Byte for NULL Terminator */
- id_len++;
- /* Identifier Length */
- buf[off+3] = id_len;
- /* Header size for Designation descriptor */
- len += (id_len + 4);
- off += (id_len + 4);
- /*
- * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD
- */
- port = lun->lun_sep;
- if (port) {
- struct t10_alua_lu_gp *lu_gp;
- u32 padding, scsi_name_len;
- u16 lu_gp_id = 0;
- u16 tg_pt_gp_id = 0;
- u16 tpgt;
-
- tpg = port->sep_tpg;
- /*
- * Relative target port identifer, see spc4r17
- * section 7.7.3.7
- *
- * Get the PROTOCOL IDENTIFIER as defined by spc4r17
- * section 7.5.1 Table 362
- */
- buf[off] =
- (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
- buf[off++] |= 0x1; /* CODE SET == Binary */
- buf[off] = 0x80; /* Set PIV=1 */
- /* Set ASSOCIATION == target port: 01b */
- buf[off] |= 0x10;
- /* DESIGNATOR TYPE == Relative target port identifer */
- buf[off++] |= 0x4;
- off++; /* Skip over Reserved */
- buf[off++] = 4; /* DESIGNATOR LENGTH */
- /* Skip over Obsolete field in RTPI payload
- * in Table 472 */
- off += 2;
- buf[off++] = ((port->sep_rtpi >> 8) & 0xff);
- buf[off++] = (port->sep_rtpi & 0xff);
- len += 8; /* Header size + Designation descriptor */
- /*
- * Target port group identifier, see spc4r17
- * section 7.7.3.8
- *
- * Get the PROTOCOL IDENTIFIER as defined by spc4r17
- * section 7.5.1 Table 362
- */
- if (dev->se_sub_dev->t10_alua.alua_type !=
- SPC3_ALUA_EMULATED)
- goto check_scsi_name;
-
- tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
- if (!tg_pt_gp_mem)
- goto check_lu_gp;
-
- spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
- tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
- if (!tg_pt_gp) {
- spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
- goto check_lu_gp;
- }
- tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id;
- spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
-
- buf[off] =
- (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
- buf[off++] |= 0x1; /* CODE SET == Binary */
- buf[off] = 0x80; /* Set PIV=1 */
- /* Set ASSOCIATION == target port: 01b */
- buf[off] |= 0x10;
- /* DESIGNATOR TYPE == Target port group identifier */
- buf[off++] |= 0x5;
- off++; /* Skip over Reserved */
- buf[off++] = 4; /* DESIGNATOR LENGTH */
- off += 2; /* Skip over Reserved Field */
- buf[off++] = ((tg_pt_gp_id >> 8) & 0xff);
- buf[off++] = (tg_pt_gp_id & 0xff);
- len += 8; /* Header size + Designation descriptor */
- /*
- * Logical Unit Group identifier, see spc4r17
- * section 7.7.3.8
- */
-check_lu_gp:
- lu_gp_mem = dev->dev_alua_lu_gp_mem;
- if (!lu_gp_mem)
- goto check_scsi_name;
-
- spin_lock(&lu_gp_mem->lu_gp_mem_lock);
- lu_gp = lu_gp_mem->lu_gp;
- if (!lu_gp) {
- spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
- goto check_scsi_name;
- }
- lu_gp_id = lu_gp->lu_gp_id;
- spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
-
- buf[off++] |= 0x1; /* CODE SET == Binary */
- /* DESIGNATOR TYPE == Logical Unit Group identifier */
- buf[off++] |= 0x6;
- off++; /* Skip over Reserved */
- buf[off++] = 4; /* DESIGNATOR LENGTH */
- off += 2; /* Skip over Reserved Field */
- buf[off++] = ((lu_gp_id >> 8) & 0xff);
- buf[off++] = (lu_gp_id & 0xff);
- len += 8; /* Header size + Designation descriptor */
- /*
- * SCSI name string designator, see spc4r17
- * section 7.7.3.11
- *
- * Get the PROTOCOL IDENTIFIER as defined by spc4r17
- * section 7.5.1 Table 362
- */
-check_scsi_name:
- scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg));
- /* 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;
-
- buf[off] =
- (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
- buf[off++] |= 0x3; /* CODE SET == UTF-8 */
- buf[off] = 0x80; /* Set PIV=1 */
- /* Set ASSOCIATION == 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->se_tpg_tfo->tpg_get_tag(tpg);
- scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x",
- tpg->se_tpg_tfo->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);
- }
- 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)
-{
- 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;
- 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;
- u32 max_sectors;
- 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)
- have_tp = 1;
-
- 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
- */
- max_sectors = min(dev->se_sub_dev->se_dev_attrib.fabric_max_sectors,
- dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
- put_unaligned_be32(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_cmd *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)
- target_complete_cmd(cmd, GOOD);
- return ret;
-}
-
-int target_emulate_readcapacity(struct se_cmd *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;
-
- transport_kunmap_data_sg(cmd);
-
- target_complete_cmd(cmd, GOOD);
- return 0;
-}
-
-int target_emulate_readcapacity_16(struct se_cmd *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);
-
- target_complete_cmd(cmd, GOOD);
- 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_cmd *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);
-
- target_complete_cmd(cmd, GOOD);
- return 0;
-}
-
-int target_emulate_request_sense(struct se_cmd *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);
- target_complete_cmd(cmd, GOOD);
- 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_cmd *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)
- target_complete_cmd(cmd, GOOD);
- 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_cmd *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) + 1;
-
- 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;
- }
-
- target_complete_cmd(cmd, GOOD);
- return 0;
-}
-
-int target_emulate_synchronize_cache(struct se_cmd *cmd)
-{
- if (!cmd->se_dev->transport->do_sync_cache) {
- pr_err("SYNCHRONIZE_CACHE emulation not supported"
- " for: %s\n", cmd->se_dev->transport->name);
- cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
- return -ENOSYS;
- }
-
- cmd->se_dev->transport->do_sync_cache(cmd);
- return 0;
-}
-
-int target_emulate_noop(struct se_cmd *cmd)
-{
- target_complete_cmd(cmd, GOOD);
- return 0;
-}
/* target_core_alua.c */
extern struct t10_alua_lu_gp *default_lu_gp;
-/* target_core_cdb.c */
-int target_emulate_inquiry(struct se_cmd *cmd);
-int target_emulate_readcapacity(struct se_cmd *cmd);
-int target_emulate_readcapacity_16(struct se_cmd *cmd);
-int target_emulate_modesense(struct se_cmd *cmd);
-int target_emulate_request_sense(struct se_cmd *cmd);
-int target_emulate_unmap(struct se_cmd *cmd);
-int target_emulate_write_same(struct se_cmd *cmd);
-int target_emulate_synchronize_cache(struct se_cmd *cmd);
-int target_emulate_noop(struct se_cmd *cmd);
-
/* target_core_device.c */
struct se_dev_entry *core_get_se_deve_from_rtpi(struct se_node_acl *, u16);
int core_free_device_list_for_node(struct se_node_acl *,
bool target_stop_cmd(struct se_cmd *cmd, unsigned long *flags);
int transport_clear_lun_from_sessions(struct se_lun *);
void transport_send_task_abort(struct se_cmd *);
+int target_cmd_size_check(struct se_cmd *cmd, unsigned int size);
/* target_core_stat.c */
void target_stat_setup_dev_default_groups(struct se_subsystem_dev *);
return -ENOMEM;
}
-static inline u32 pscsi_get_sectors_6(
- unsigned char *cdb,
- struct se_cmd *cmd,
- int *ret)
+static int pscsi_parse_cdb(struct se_cmd *cmd)
{
- struct se_device *dev = cmd->se_dev;
-
- /*
- * Assume TYPE_DISK for non struct se_device objects.
- * Use 8-bit sector value.
- */
- if (!dev)
- goto type_disk;
-
- /*
- * Use 24-bit allocation length for TYPE_TAPE.
- */
- if (dev->transport->get_device_type(dev) == TYPE_TAPE)
- return (u32)(cdb[2] << 16) + (cdb[3] << 8) + cdb[4];
-
- /*
- * Everything else assume TYPE_DISK Sector CDB location.
- * Use 8-bit sector value. SBC-3 says:
- *
- * A TRANSFER LENGTH field set to zero specifies that 256
- * logical blocks shall be written. Any other value
- * specifies the number of logical blocks that shall be
- * written.
- */
-type_disk:
- return cdb[4] ? : 256;
-}
-
-static inline u32 pscsi_get_sectors_10(
- unsigned char *cdb,
- struct se_cmd *cmd,
- int *ret)
-{
- struct se_device *dev = cmd->se_dev;
-
- /*
- * Assume TYPE_DISK for non struct se_device objects.
- * Use 16-bit sector value.
- */
- if (!dev)
- goto type_disk;
-
- /*
- * XXX_10 is not defined in SSC, throw an exception
- */
- if (dev->transport->get_device_type(dev) == TYPE_TAPE) {
- *ret = -EINVAL;
- return 0;
- }
-
- /*
- * Everything else assume TYPE_DISK Sector CDB location.
- * Use 16-bit sector value.
- */
-type_disk:
- return (u32)(cdb[7] << 8) + cdb[8];
-}
-
-static inline u32 pscsi_get_sectors_12(
- unsigned char *cdb,
- struct se_cmd *cmd,
- int *ret)
-{
- struct se_device *dev = cmd->se_dev;
-
- /*
- * Assume TYPE_DISK for non struct se_device objects.
- * Use 32-bit sector value.
- */
- if (!dev)
- goto type_disk;
+ unsigned char *cdb = cmd->t_task_cdb;
+ unsigned int dummy_size;
+ int ret;
- /*
- * XXX_12 is not defined in SSC, throw an exception
- */
- if (dev->transport->get_device_type(dev) == TYPE_TAPE) {
- *ret = -EINVAL;
- return 0;
+ if (cmd->se_cmd_flags & SCF_BIDI) {
+ cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
+ return -EINVAL;
}
/*
- * Everything else assume TYPE_DISK Sector CDB location.
- * Use 32-bit sector value.
+ * For REPORT LUNS we always need to emulate the respone, and for everything
+ * related to persistent reservations and ALUA we might optionally use our
+ * handlers before passing on the command to the physical hardware.
*/
-type_disk:
- return (u32)(cdb[6] << 24) + (cdb[7] << 16) + (cdb[8] << 8) + cdb[9];
-}
-
-static inline u32 pscsi_get_sectors_16(
- unsigned char *cdb,
- struct se_cmd *cmd,
- int *ret)
-{
- struct se_device *dev = cmd->se_dev;
-
- /*
- * Assume TYPE_DISK for non struct se_device objects.
- * Use 32-bit sector value.
- */
- if (!dev)
- goto type_disk;
-
- /*
- * Use 24-bit allocation length for TYPE_TAPE.
- */
- if (dev->transport->get_device_type(dev) == TYPE_TAPE)
- return (u32)(cdb[12] << 16) + (cdb[13] << 8) + cdb[14];
-
-type_disk:
- return (u32)(cdb[10] << 24) + (cdb[11] << 16) +
- (cdb[12] << 8) + cdb[13];
-}
-
-/*
- * Used for VARIABLE_LENGTH_CDB WRITE_32 and READ_32 variants
- */
-static inline u32 pscsi_get_sectors_32(
- unsigned char *cdb,
- struct se_cmd *cmd,
- int *ret)
-{
- /*
- * Assume TYPE_DISK for non struct se_device objects.
- * Use 32-bit sector value.
- */
- return (u32)(cdb[28] << 24) + (cdb[29] << 16) +
- (cdb[30] << 8) + cdb[31];
-
-}
-
-static inline u32 pscsi_get_lba_21(unsigned char *cdb)
-{
- return ((cdb[1] & 0x1f) << 16) | (cdb[2] << 8) | cdb[3];
-}
-
-static inline u32 pscsi_get_lba_32(unsigned char *cdb)
-{
- return (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5];
-}
-
-static inline unsigned long long pscsi_get_lba_64(unsigned char *cdb)
-{
- unsigned int __v1, __v2;
-
- __v1 = (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5];
- __v2 = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
-
- return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32;
-}
-
-/*
- * For VARIABLE_LENGTH_CDB w/ 32 byte extended CDBs
- */
-static inline unsigned long long pscsi_get_lba_64_ext(unsigned char *cdb)
-{
- unsigned int __v1, __v2;
-
- __v1 = (cdb[12] << 24) | (cdb[13] << 16) | (cdb[14] << 8) | cdb[15];
- __v2 = (cdb[16] << 24) | (cdb[17] << 16) | (cdb[18] << 8) | cdb[19];
-
- return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32;
-}
-
-
-static inline u32 pscsi_get_size(
- u32 sectors,
- unsigned char *cdb,
- struct se_cmd *cmd)
-{
- struct se_device *dev = cmd->se_dev;
-
- if (dev->transport->get_device_type(dev) == TYPE_TAPE) {
- if (cdb[1] & 1) { /* sectors */
- return dev->se_sub_dev->se_dev_attrib.block_size * sectors;
- } else /* bytes */
- return sectors;
- }
-
- pr_debug("Returning block_size: %u, sectors: %u == %u for"
- " %s object\n", dev->se_sub_dev->se_dev_attrib.block_size,
- sectors, dev->se_sub_dev->se_dev_attrib.block_size * sectors,
- dev->transport->name);
-
- return dev->se_sub_dev->se_dev_attrib.block_size * sectors;
-}
-
-static int pscsi_parse_cdb(struct se_cmd *cmd, unsigned int *size)
-{
- struct se_device *dev = cmd->se_dev;
- struct se_subsystem_dev *su_dev = dev->se_sub_dev;
- unsigned char *cdb = cmd->t_task_cdb;
- int sector_ret = 0;
- u32 sectors = 0;
- u16 service_action;
- int ret;
-
- if (cmd->se_cmd_flags & SCF_BIDI)
- goto out_unsupported_cdb;
-
switch (cdb[0]) {
- case READ_6:
- sectors = pscsi_get_sectors_6(cdb, cmd, §or_ret);
- if (sector_ret)
- goto out_unsupported_cdb;
- *size = pscsi_get_size(sectors, cdb, cmd);
- cmd->t_task_lba = pscsi_get_lba_21(cdb);
- cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
+ case REPORT_LUNS:
+ case PERSISTENT_RESERVE_IN:
+ case PERSISTENT_RESERVE_OUT:
+ case RELEASE:
+ case RELEASE_10:
+ case RESERVE:
+ case RESERVE_10:
+ ret = spc_parse_cdb(cmd, &dummy_size);
+ if (ret)
+ return ret;
break;
+ case READ_6:
case READ_10:
- sectors = pscsi_get_sectors_10(cdb, cmd, §or_ret);
- if (sector_ret)
- goto out_unsupported_cdb;
- *size = pscsi_get_size(sectors, cdb, cmd);
- cmd->t_task_lba = pscsi_get_lba_32(cdb);
- cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
- break;
case READ_12:
- sectors = pscsi_get_sectors_12(cdb, cmd, §or_ret);
- if (sector_ret)
- goto out_unsupported_cdb;
- *size = pscsi_get_size(sectors, cdb, cmd);
- cmd->t_task_lba = pscsi_get_lba_32(cdb);
- cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
- break;
case READ_16:
- sectors = pscsi_get_sectors_16(cdb, cmd, §or_ret);
- if (sector_ret)
- goto out_unsupported_cdb;
- *size = pscsi_get_size(sectors, cdb, cmd);
- cmd->t_task_lba = pscsi_get_lba_64(cdb);
- cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
- break;
case WRITE_6:
- sectors = pscsi_get_sectors_6(cdb, cmd, §or_ret);
- if (sector_ret)
- goto out_unsupported_cdb;
- *size = pscsi_get_size(sectors, cdb, cmd);
- cmd->t_task_lba = pscsi_get_lba_21(cdb);
- cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
- break;
case WRITE_10:
- case WRITE_VERIFY:
- sectors = pscsi_get_sectors_10(cdb, cmd, §or_ret);
- if (sector_ret)
- goto out_unsupported_cdb;
- *size = pscsi_get_size(sectors, cdb, cmd);
- cmd->t_task_lba = pscsi_get_lba_32(cdb);
- if (cdb[1] & 0x8)
- cmd->se_cmd_flags |= SCF_FUA;
- cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
- break;
case WRITE_12:
- sectors = pscsi_get_sectors_12(cdb, cmd, §or_ret);
- if (sector_ret)
- goto out_unsupported_cdb;
- *size = pscsi_get_size(sectors, cdb, cmd);
- cmd->t_task_lba = pscsi_get_lba_32(cdb);
- if (cdb[1] & 0x8)
- cmd->se_cmd_flags |= SCF_FUA;
- cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
- break;
case WRITE_16:
- sectors = pscsi_get_sectors_16(cdb, cmd, §or_ret);
- if (sector_ret)
- goto out_unsupported_cdb;
- *size = pscsi_get_size(sectors, cdb, cmd);
- cmd->t_task_lba = pscsi_get_lba_64(cdb);
- if (cdb[1] & 0x8)
- cmd->se_cmd_flags |= SCF_FUA;
+ case WRITE_VERIFY:
cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
break;
- case VARIABLE_LENGTH_CMD:
- service_action = get_unaligned_be16(&cdb[8]);
- switch (service_action) {
- case WRITE_SAME_32:
- sectors = pscsi_get_sectors_32(cdb, cmd, §or_ret);
- if (sector_ret)
- goto out_unsupported_cdb;
-
- if (!sectors) {
- pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not"
- " supported\n");
- goto out_invalid_cdb_field;
- }
-
- *size = pscsi_get_size(1, cdb, cmd);
- cmd->t_task_lba = get_unaligned_be64(&cdb[12]);
- break;
- default:
- pr_err("VARIABLE_LENGTH_CMD service action"
- " 0x%04x not supported\n", service_action);
- goto out_unsupported_cdb;
- }
- break;
- case GPCMD_READ_BUFFER_CAPACITY:
- case GPCMD_SEND_OPC:
- *size = (cdb[7] << 8) + cdb[8];
- break;
- case READ_BLOCK_LIMITS:
- *size = READ_BLOCK_LEN;
- break;
- case GPCMD_GET_CONFIGURATION:
- case GPCMD_READ_FORMAT_CAPACITIES:
- case GPCMD_READ_DISC_INFO:
- case GPCMD_READ_TRACK_RZONE_INFO:
- *size = (cdb[7] << 8) + cdb[8];
- break;
- case GPCMD_MECHANISM_STATUS:
- case GPCMD_READ_DVD_STRUCTURE:
- *size = (cdb[8] << 8) + cdb[9];
- break;
- case READ_POSITION:
- *size = READ_POSITION_LEN;
- break;
- case READ_BUFFER:
- *size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8];
- break;
- case READ_CAPACITY:
- *size = READ_CAP_LEN;
- break;
- case READ_MEDIA_SERIAL_NUMBER:
- case SERVICE_ACTION_IN:
- case ACCESS_CONTROL_IN:
- case ACCESS_CONTROL_OUT:
- *size = (cdb[10] << 24) | (cdb[11] << 16) |
- (cdb[12] << 8) | cdb[13];
- break;
- case READ_TOC:
- *size = cdb[8];
- break;
- case READ_ELEMENT_STATUS:
- *size = 65536 * cdb[7] + 256 * cdb[8] + cdb[9];
- break;
- case SYNCHRONIZE_CACHE:
- case SYNCHRONIZE_CACHE_16:
- /*
- * Extract LBA and range to be flushed for emulated SYNCHRONIZE_CACHE
- */
- if (cdb[0] == SYNCHRONIZE_CACHE) {
- sectors = pscsi_get_sectors_10(cdb, cmd, §or_ret);
- cmd->t_task_lba = pscsi_get_lba_32(cdb);
- } else {
- sectors = pscsi_get_sectors_16(cdb, cmd, §or_ret);
- cmd->t_task_lba = pscsi_get_lba_64(cdb);
- }
- if (sector_ret)
- goto out_unsupported_cdb;
-
- *size = pscsi_get_size(sectors, cdb, cmd);
- break;
- case UNMAP:
- *size = get_unaligned_be16(&cdb[7]);
- break;
- case WRITE_SAME_16:
- sectors = pscsi_get_sectors_16(cdb, cmd, §or_ret);
- if (sector_ret)
- goto out_unsupported_cdb;
-
- if (!sectors) {
- pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n");
- goto out_invalid_cdb_field;
- }
-
- *size = pscsi_get_size(1, cdb, cmd);
- cmd->t_task_lba = get_unaligned_be64(&cdb[2]);
- break;
- case WRITE_SAME:
- sectors = pscsi_get_sectors_10(cdb, cmd, §or_ret);
- if (sector_ret)
- goto out_unsupported_cdb;
-
- if (!sectors) {
- pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n");
- goto out_invalid_cdb_field;
- }
-
- *size = pscsi_get_size(1, cdb, cmd);
- cmd->t_task_lba = get_unaligned_be32(&cdb[2]);
- break;
- case ALLOW_MEDIUM_REMOVAL:
- case ERASE:
- case REZERO_UNIT:
- case SEEK_10:
- case SPACE:
- case START_STOP:
- case VERIFY:
- case WRITE_FILEMARKS:
- case GPCMD_CLOSE_TRACK:
- case INITIALIZE_ELEMENT_STATUS:
- case GPCMD_LOAD_UNLOAD:
- case GPCMD_SET_SPEED:
- case MOVE_MEDIUM:
- *size = 0;
- break;
- case GET_EVENT_STATUS_NOTIFICATION:
- *size = (cdb[7] << 8) | cdb[8];
- break;
- case ATA_16:
- switch (cdb[2] & 0x3) { /* T_LENGTH */
- case 0x0:
- sectors = 0;
- break;
- case 0x1:
- sectors = (((cdb[1] & 0x1) ? cdb[3] : 0) << 8) | cdb[4];
- break;
- case 0x2:
- sectors = (((cdb[1] & 0x1) ? cdb[5] : 0) << 8) | cdb[6];
- break;
- case 0x3:
- pr_err("T_LENGTH=0x3 not supported for ATA_16\n");
- goto out_invalid_cdb_field;
- }
-
- /* BYTE_BLOCK */
- if (cdb[2] & 0x4) {
- /* BLOCK T_TYPE: 512 or sector */
- *size = sectors * ((cdb[2] & 0x10) ?
- dev->se_sub_dev->se_dev_attrib.block_size : 512);
- } else {
- /* BYTE */
- *size = sectors;
- }
- break;
default:
- ret = spc_parse_cdb(cmd, size, true);
- if (ret)
- return ret;
- }
-
- if (cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) {
- if (sectors > su_dev->se_dev_attrib.fabric_max_sectors) {
- printk_ratelimited(KERN_ERR "SCSI OP %02xh with too"
- " big sectors %u exceeds fabric_max_sectors:"
- " %u\n", cdb[0], sectors,
- su_dev->se_dev_attrib.fabric_max_sectors);
- goto out_invalid_cdb_field;
- }
- if (sectors > su_dev->se_dev_attrib.hw_max_sectors) {
- printk_ratelimited(KERN_ERR "SCSI OP %02xh with too"
- " big sectors %u exceeds backend hw_max_sectors:"
- " %u\n", cdb[0], sectors,
- su_dev->se_dev_attrib.hw_max_sectors);
- goto out_invalid_cdb_field;
- }
+ break;
}
return 0;
-
-out_unsupported_cdb:
- cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
- cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
- return -EINVAL;
-out_invalid_cdb_field:
- cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
- cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
- return -EINVAL;
}
-
static int pscsi_execute_cmd(struct se_cmd *cmd, struct scatterlist *sgl,
u32 sgl_nents, enum dma_data_direction data_direction)
{
#include "target_core_ua.h"
+static int sbc_emulate_readcapacity(struct se_cmd *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;
+
+ transport_kunmap_data_sg(cmd);
+
+ target_complete_cmd(cmd, GOOD);
+ return 0;
+}
+
+static int sbc_emulate_readcapacity_16(struct se_cmd *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);
+
+ target_complete_cmd(cmd, GOOD);
+ 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 sbc_emulate_unmap(struct se_cmd *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)
+ target_complete_cmd(cmd, GOOD);
+ 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
+ */
+static int sbc_emulate_write_same(struct se_cmd *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) + 1;
+
+ 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;
+ }
+
+ target_complete_cmd(cmd, GOOD);
+ return 0;
+}
+
+static int sbc_emulate_synchronize_cache(struct se_cmd *cmd)
+{
+ if (!cmd->se_dev->transport->do_sync_cache) {
+ pr_err("SYNCHRONIZE_CACHE emulation not supported"
+ " for: %s\n", cmd->se_dev->transport->name);
+ cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
+ return -ENOSYS;
+ }
+
+ cmd->se_dev->transport->do_sync_cache(cmd);
+ return 0;
+}
+
+static int sbc_emulate_verify(struct se_cmd *cmd)
+{
+ target_complete_cmd(cmd, GOOD);
+ return 0;
+}
+
static inline u32 sbc_get_size(struct se_cmd *cmd, u32 sectors)
{
return cmd->se_dev->se_sub_dev->se_dev_attrib.block_size * sectors;
kfree(buf);
}
-int sbc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
+int sbc_parse_cdb(struct se_cmd *cmd)
{
struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev;
struct se_device *dev = cmd->se_dev;
unsigned char *cdb = cmd->t_task_cdb;
+ unsigned int size;
u32 sectors = 0;
int ret;
goto out_invalid_cdb_field;
}
- *size = sbc_get_size(cmd, 1);
+ size = sbc_get_size(cmd, 1);
cmd->t_task_lba = get_unaligned_be64(&cdb[12]);
if (sbc_write_same_supported(dev, &cdb[10]) < 0)
goto out_unsupported_cdb;
- cmd->execute_cmd = target_emulate_write_same;
+ cmd->execute_cmd = sbc_emulate_write_same;
break;
default:
pr_err("VARIABLE_LENGTH_CMD service action"
break;
}
case READ_CAPACITY:
- *size = READ_CAP_LEN;
- cmd->execute_cmd = target_emulate_readcapacity;
+ size = READ_CAP_LEN;
+ cmd->execute_cmd = sbc_emulate_readcapacity;
break;
case SERVICE_ACTION_IN:
switch (cmd->t_task_cdb[1] & 0x1f) {
case SAI_READ_CAPACITY_16:
- cmd->execute_cmd = target_emulate_readcapacity_16;
+ cmd->execute_cmd = sbc_emulate_readcapacity_16;
break;
default:
pr_err("Unsupported SA: 0x%02x\n",
cmd->t_task_cdb[1] & 0x1f);
goto out_invalid_cdb_field;
}
- *size = (cdb[10] << 24) | (cdb[11] << 16) |
+ size = (cdb[10] << 24) | (cdb[11] << 16) |
(cdb[12] << 8) | cdb[13];
break;
case SYNCHRONIZE_CACHE:
cmd->t_task_lba = transport_lba_64(cdb);
}
- *size = sbc_get_size(cmd, sectors);
+ size = sbc_get_size(cmd, sectors);
/*
* Check to ensure that LBA + Range does not exceed past end of
if (sbc_check_valid_sectors(cmd) < 0)
goto out_invalid_cdb_field;
}
- cmd->execute_cmd = target_emulate_synchronize_cache;
+ cmd->execute_cmd = sbc_emulate_synchronize_cache;
break;
case UNMAP:
- *size = get_unaligned_be16(&cdb[7]);
- cmd->execute_cmd = target_emulate_unmap;
+ size = get_unaligned_be16(&cdb[7]);
+ cmd->execute_cmd = sbc_emulate_unmap;
break;
case WRITE_SAME_16:
sectors = transport_get_sectors_16(cdb);
goto out_invalid_cdb_field;
}
- *size = sbc_get_size(cmd, 1);
+ size = sbc_get_size(cmd, 1);
cmd->t_task_lba = get_unaligned_be64(&cdb[2]);
if (sbc_write_same_supported(dev, &cdb[1]) < 0)
goto out_unsupported_cdb;
- cmd->execute_cmd = target_emulate_write_same;
+ cmd->execute_cmd = sbc_emulate_write_same;
break;
case WRITE_SAME:
sectors = transport_get_sectors_10(cdb);
goto out_invalid_cdb_field;
}
- *size = sbc_get_size(cmd, 1);
+ size = sbc_get_size(cmd, 1);
cmd->t_task_lba = get_unaligned_be32(&cdb[2]);
/*
*/
if (sbc_write_same_supported(dev, &cdb[1]) < 0)
goto out_unsupported_cdb;
- cmd->execute_cmd = target_emulate_write_same;
+ cmd->execute_cmd = sbc_emulate_write_same;
break;
case VERIFY:
- *size = 0;
- cmd->execute_cmd = target_emulate_noop;
+ size = 0;
+ cmd->execute_cmd = sbc_emulate_verify;
break;
default:
- ret = spc_parse_cdb(cmd, size, false);
+ ret = spc_parse_cdb(cmd, &size);
if (ret)
return ret;
}
goto out_unsupported_cdb;
if (cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) {
+ unsigned long long end_lba;
+
if (sectors > su_dev->se_dev_attrib.fabric_max_sectors) {
printk_ratelimited(KERN_ERR "SCSI OP %02xh with too"
" big sectors %u exceeds fabric_max_sectors:"
goto out_invalid_cdb_field;
}
- *size = sbc_get_size(cmd, sectors);
+ end_lba = dev->transport->get_blocks(dev) + 1;
+ if (cmd->t_task_lba + sectors > end_lba) {
+ pr_err("cmd exceeds last lba %llu "
+ "(lba %llu, sectors %u)\n",
+ end_lba, cmd->t_task_lba, sectors);
+ goto out_invalid_cdb_field;
+ }
+
+ size = sbc_get_size(cmd, sectors);
}
+ ret = target_cmd_size_check(cmd, size);
+ if (ret < 0)
+ return ret;
+
return 0;
out_unsupported_cdb:
#include "target_core_ua.h"
-int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size, bool passthrough)
+static void spc_fill_alua_data(struct se_port *port, unsigned char *buf)
+{
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
+
+ /*
+ * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS.
+ */
+ buf[5] = 0x80;
+
+ /*
+ * Set TPGS field for explict and/or implict ALUA access type
+ * and opteration.
+ *
+ * See spc4r17 section 6.4.2 Table 135
+ */
+ if (!port)
+ return;
+ tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
+ if (!tg_pt_gp_mem)
+ return;
+
+ spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
+ if (tg_pt_gp)
+ buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type;
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+}
+
+static int spc_emulate_inquiry_std(struct se_cmd *cmd, char *buf)
+{
+ struct se_lun *lun = cmd->se_lun;
+ struct se_device *dev = cmd->se_dev;
+
+ /* Set RMB (removable media) for tape devices */
+ if (dev->transport->get_device_type(dev) == TYPE_TAPE)
+ buf[1] = 0x80;
+
+ buf[2] = dev->transport->get_device_rev(dev);
+
+ /*
+ * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2
+ *
+ * SPC4 says:
+ * A RESPONSE DATA FORMAT field set to 2h indicates that the
+ * standard INQUIRY data is in the format defined in this
+ * standard. Response data format values less than 2h are
+ * obsolete. Response data format values greater than 2h are
+ * reserved.
+ */
+ buf[3] = 2;
+
+ /*
+ * Enable SCCS and TPGS fields for Emulated ALUA
+ */
+ if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED)
+ spc_fill_alua_data(lun->lun_sep, buf);
+
+ buf[7] = 0x2; /* CmdQue=1 */
+
+ snprintf(&buf[8], 8, "LIO-ORG");
+ snprintf(&buf[16], 16, "%s", dev->se_sub_dev->t10_wwn.model);
+ snprintf(&buf[32], 4, "%s", dev->se_sub_dev->t10_wwn.revision);
+ buf[4] = 31; /* Set additional length to 31 */
+
+ return 0;
+}
+
+/* unit serial number */
+static int spc_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf)
+{
+ struct se_device *dev = cmd->se_dev;
+ u16 len = 0;
+
+ if (dev->se_sub_dev->su_dev_flags &
+ SDF_EMULATED_VPD_UNIT_SERIAL) {
+ u32 unit_serial_len;
+
+ unit_serial_len = strlen(dev->se_sub_dev->t10_wwn.unit_serial);
+ unit_serial_len++; /* For NULL Terminator */
+
+ len += sprintf(&buf[4], "%s",
+ dev->se_sub_dev->t10_wwn.unit_serial);
+ len++; /* Extra Byte for NULL Terminator */
+ buf[3] = len;
+ }
+ return 0;
+}
+
+static void spc_parse_naa_6h_vendor_specific(struct se_device *dev,
+ unsigned char *buf)
+{
+ unsigned char *p = &dev->se_sub_dev->t10_wwn.unit_serial[0];
+ int cnt;
+ bool next = true;
+
+ /*
+ * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on
+ * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field
+ * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION
+ * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL
+ * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure
+ * per device uniqeness.
+ */
+ for (cnt = 0; *p && cnt < 13; p++) {
+ int val = hex_to_bin(*p);
+
+ if (val < 0)
+ continue;
+
+ if (next) {
+ next = false;
+ buf[cnt++] |= val;
+ } else {
+ next = true;
+ buf[cnt] = val << 4;
+ }
+ }
+}
+
+/*
+ * Device identification VPD, for a complete list of
+ * DESIGNATOR TYPEs see spc4r17 Table 459.
+ */
+static int spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct se_lun *lun = cmd->se_lun;
+ struct se_port *port = NULL;
+ struct se_portal_group *tpg = NULL;
+ struct t10_alua_lu_gp_member *lu_gp_mem;
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
+ unsigned char *prod = &dev->se_sub_dev->t10_wwn.model[0];
+ u32 prod_len;
+ u32 unit_serial_len, off = 0;
+ u16 len = 0, id_len;
+
+ off = 4;
+
+ /*
+ * NAA IEEE Registered Extended Assigned designator format, see
+ * spc4r17 section 7.7.3.6.5
+ *
+ * We depend upon a target_core_mod/ConfigFS provided
+ * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial
+ * value in order to return the NAA id.
+ */
+ if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL))
+ goto check_t10_vend_desc;
+
+ /* CODE SET == Binary */
+ buf[off++] = 0x1;
+
+ /* Set ASSOCIATION == addressed logical unit: 0)b */
+ buf[off] = 0x00;
+
+ /* Identifier/Designator type == NAA identifier */
+ buf[off++] |= 0x3;
+ off++;
+
+ /* Identifier/Designator length */
+ buf[off++] = 0x10;
+
+ /*
+ * Start NAA IEEE Registered Extended Identifier/Designator
+ */
+ buf[off++] = (0x6 << 4);
+
+ /*
+ * Use OpenFabrics IEEE Company ID: 00 14 05
+ */
+ buf[off++] = 0x01;
+ buf[off++] = 0x40;
+ buf[off] = (0x5 << 4);
+
+ /*
+ * Return ConfigFS Unit Serial Number information for
+ * VENDOR_SPECIFIC_IDENTIFIER and
+ * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION
+ */
+ spc_parse_naa_6h_vendor_specific(dev, &buf[off]);
+
+ len = 20;
+ off = (len + 4);
+
+check_t10_vend_desc:
+ /*
+ * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4
+ */
+ id_len = 8; /* For Vendor field */
+ prod_len = 4; /* For VPD Header */
+ prod_len += 8; /* For Vendor field */
+ prod_len += strlen(prod);
+ prod_len++; /* For : */
+
+ if (dev->se_sub_dev->su_dev_flags &
+ SDF_EMULATED_VPD_UNIT_SERIAL) {
+ unit_serial_len =
+ strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]);
+ unit_serial_len++; /* For NULL Terminator */
+
+ id_len += sprintf(&buf[off+12], "%s:%s", prod,
+ &dev->se_sub_dev->t10_wwn.unit_serial[0]);
+ }
+ buf[off] = 0x2; /* ASCII */
+ buf[off+1] = 0x1; /* T10 Vendor ID */
+ buf[off+2] = 0x0;
+ memcpy(&buf[off+4], "LIO-ORG", 8);
+ /* Extra Byte for NULL Terminator */
+ id_len++;
+ /* Identifier Length */
+ buf[off+3] = id_len;
+ /* Header size for Designation descriptor */
+ len += (id_len + 4);
+ off += (id_len + 4);
+ /*
+ * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD
+ */
+ port = lun->lun_sep;
+ if (port) {
+ struct t10_alua_lu_gp *lu_gp;
+ u32 padding, scsi_name_len;
+ u16 lu_gp_id = 0;
+ u16 tg_pt_gp_id = 0;
+ u16 tpgt;
+
+ tpg = port->sep_tpg;
+ /*
+ * Relative target port identifer, see spc4r17
+ * section 7.7.3.7
+ *
+ * Get the PROTOCOL IDENTIFIER as defined by spc4r17
+ * section 7.5.1 Table 362
+ */
+ buf[off] =
+ (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
+ buf[off++] |= 0x1; /* CODE SET == Binary */
+ buf[off] = 0x80; /* Set PIV=1 */
+ /* Set ASSOCIATION == target port: 01b */
+ buf[off] |= 0x10;
+ /* DESIGNATOR TYPE == Relative target port identifer */
+ buf[off++] |= 0x4;
+ off++; /* Skip over Reserved */
+ buf[off++] = 4; /* DESIGNATOR LENGTH */
+ /* Skip over Obsolete field in RTPI payload
+ * in Table 472 */
+ off += 2;
+ buf[off++] = ((port->sep_rtpi >> 8) & 0xff);
+ buf[off++] = (port->sep_rtpi & 0xff);
+ len += 8; /* Header size + Designation descriptor */
+ /*
+ * Target port group identifier, see spc4r17
+ * section 7.7.3.8
+ *
+ * Get the PROTOCOL IDENTIFIER as defined by spc4r17
+ * section 7.5.1 Table 362
+ */
+ if (dev->se_sub_dev->t10_alua.alua_type !=
+ SPC3_ALUA_EMULATED)
+ goto check_scsi_name;
+
+ tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
+ if (!tg_pt_gp_mem)
+ goto check_lu_gp;
+
+ spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
+ if (!tg_pt_gp) {
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ goto check_lu_gp;
+ }
+ tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id;
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+
+ buf[off] =
+ (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
+ buf[off++] |= 0x1; /* CODE SET == Binary */
+ buf[off] = 0x80; /* Set PIV=1 */
+ /* Set ASSOCIATION == target port: 01b */
+ buf[off] |= 0x10;
+ /* DESIGNATOR TYPE == Target port group identifier */
+ buf[off++] |= 0x5;
+ off++; /* Skip over Reserved */
+ buf[off++] = 4; /* DESIGNATOR LENGTH */
+ off += 2; /* Skip over Reserved Field */
+ buf[off++] = ((tg_pt_gp_id >> 8) & 0xff);
+ buf[off++] = (tg_pt_gp_id & 0xff);
+ len += 8; /* Header size + Designation descriptor */
+ /*
+ * Logical Unit Group identifier, see spc4r17
+ * section 7.7.3.8
+ */
+check_lu_gp:
+ lu_gp_mem = dev->dev_alua_lu_gp_mem;
+ if (!lu_gp_mem)
+ goto check_scsi_name;
+
+ spin_lock(&lu_gp_mem->lu_gp_mem_lock);
+ lu_gp = lu_gp_mem->lu_gp;
+ if (!lu_gp) {
+ spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
+ goto check_scsi_name;
+ }
+ lu_gp_id = lu_gp->lu_gp_id;
+ spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
+
+ buf[off++] |= 0x1; /* CODE SET == Binary */
+ /* DESIGNATOR TYPE == Logical Unit Group identifier */
+ buf[off++] |= 0x6;
+ off++; /* Skip over Reserved */
+ buf[off++] = 4; /* DESIGNATOR LENGTH */
+ off += 2; /* Skip over Reserved Field */
+ buf[off++] = ((lu_gp_id >> 8) & 0xff);
+ buf[off++] = (lu_gp_id & 0xff);
+ len += 8; /* Header size + Designation descriptor */
+ /*
+ * SCSI name string designator, see spc4r17
+ * section 7.7.3.11
+ *
+ * Get the PROTOCOL IDENTIFIER as defined by spc4r17
+ * section 7.5.1 Table 362
+ */
+check_scsi_name:
+ scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg));
+ /* 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;
+
+ buf[off] =
+ (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
+ buf[off++] |= 0x3; /* CODE SET == UTF-8 */
+ buf[off] = 0x80; /* Set PIV=1 */
+ /* Set ASSOCIATION == 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->se_tpg_tfo->tpg_get_tag(tpg);
+ scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x",
+ tpg->se_tpg_tfo->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);
+ }
+ buf[2] = ((len >> 8) & 0xff);
+ buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */
+ return 0;
+}
+
+/* Extended INQUIRY Data VPD Page */
+static int spc_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;
+ return 0;
+}
+
+/* Block Limits VPD page */
+static int spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
+{
+ struct se_device *dev = cmd->se_dev;
+ u32 max_sectors;
+ int have_tp = 0;
+
+ /*
+ * Following spc3r22 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)
+ have_tp = 1;
+
+ 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
+ */
+ max_sectors = min(dev->se_sub_dev->se_dev_attrib.fabric_max_sectors,
+ dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
+ put_unaligned_be32(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 spc_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 spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf)
+{
+ struct se_device *dev = cmd->se_dev;
+
+ /*
+ * From spc3r22 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 spc_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 = spc_emulate_evpd_00 },
+ { .page = 0x80, .emulate = spc_emulate_evpd_80 },
+ { .page = 0x83, .emulate = spc_emulate_evpd_83 },
+ { .page = 0x86, .emulate = spc_emulate_evpd_86 },
+ { .page = 0xb0, .emulate = spc_emulate_evpd_b0 },
+ { .page = 0xb1, .emulate = spc_emulate_evpd_b1 },
+ { .page = 0xb2, .emulate = spc_emulate_evpd_b2 },
+};
+
+/* supported vital product data pages */
+static int spc_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;
+}
+
+static int spc_emulate_inquiry(struct se_cmd *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 = spc_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)
+ target_complete_cmd(cmd, GOOD);
+ return ret;
+}
+
+static int spc_modesense_rwrecovery(unsigned char *p)
+{
+ p[0] = 0x01;
+ p[1] = 0x0a;
+
+ return 12;
+}
+
+static int spc_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 spc_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 spc_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 spc_modesense_dpofua(unsigned char *buf, int type)
+{
+ switch (type) {
+ case TYPE_DISK:
+ buf[0] |= 0x10; /* DPOFUA bit */
+ break;
+ default:
+ break;
+ }
+}
+
+static int spc_emulate_modesense(struct se_cmd *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 = spc_modesense_rwrecovery(&buf[offset]);
+ break;
+ case 0x08:
+ length = spc_modesense_caching(dev, &buf[offset]);
+ break;
+ case 0x0a:
+ length = spc_modesense_control(dev, &buf[offset]);
+ break;
+ case 0x3f:
+ length = spc_modesense_rwrecovery(&buf[offset]);
+ length += spc_modesense_caching(dev, &buf[offset+length]);
+ length += spc_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)))
+ spc_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))
+ spc_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)))
+ spc_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))
+ spc_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);
+
+ target_complete_cmd(cmd, GOOD);
+ return 0;
+}
+
+static int spc_emulate_request_sense(struct se_cmd *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);
+ target_complete_cmd(cmd, GOOD);
+ return 0;
+}
+
+static int spc_emulate_testunitready(struct se_cmd *cmd)
+{
+ target_complete_cmd(cmd, GOOD);
+ return 0;
+}
+
+int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
{
struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev;
unsigned char *cdb = cmd->t_task_cdb;
break;
case MODE_SENSE:
*size = cdb[4];
- if (!passthrough)
- cmd->execute_cmd = target_emulate_modesense;
+ cmd->execute_cmd = spc_emulate_modesense;
break;
case MODE_SENSE_10:
*size = (cdb[7] << 8) + cdb[8];
- if (!passthrough)
- cmd->execute_cmd = target_emulate_modesense;
+ cmd->execute_cmd = spc_emulate_modesense;
break;
case LOG_SELECT:
case LOG_SENSE:
break;
case REQUEST_SENSE:
*size = cdb[4];
- if (!passthrough)
- cmd->execute_cmd = target_emulate_request_sense;
+ cmd->execute_cmd = spc_emulate_request_sense;
break;
case INQUIRY:
*size = (cdb[3] << 8) + cdb[4];
*/
if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED)
cmd->sam_task_attr = MSG_HEAD_TAG;
- if (!passthrough)
- cmd->execute_cmd = target_emulate_inquiry;
+ cmd->execute_cmd = spc_emulate_inquiry;
break;
case SECURITY_PROTOCOL_IN:
case SECURITY_PROTOCOL_OUT:
cmd->sam_task_attr = MSG_HEAD_TAG;
break;
case TEST_UNIT_READY:
+ cmd->execute_cmd = spc_emulate_testunitready;
*size = 0;
- if (!passthrough)
- cmd->execute_cmd = target_emulate_noop;
break;
default:
pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode"
}
}
-static int target_cmd_size_check(struct se_cmd *cmd, unsigned int size)
+int target_cmd_size_check(struct se_cmd *cmd, unsigned int size)
{
struct se_device *dev = cmd->se_dev;
u32 pr_reg_type = 0;
u8 alua_ascq = 0;
unsigned long flags;
- unsigned int size;
int ret;
transport_generic_prepare_cdb(cdb);
*/
}
- ret = cmd->se_dev->transport->parse_cdb(cmd, &size);
- if (ret < 0)
- return ret;
-
- ret = target_cmd_size_check(cmd, size);
+ ret = cmd->se_dev->transport->parse_cdb(cmd);
if (ret < 0)
return ret;
return -1;
}
-static inline long long transport_dev_end_lba(struct se_device *dev)
-{
- return dev->transport->get_blocks(dev) + 1;
-}
-
-static int transport_cmd_get_valid_sectors(struct se_cmd *cmd)
-{
- struct se_device *dev = cmd->se_dev;
- u32 sectors;
-
- if (dev->transport->get_device_type(dev) != TYPE_DISK)
- return 0;
-
- sectors = (cmd->data_length / dev->se_sub_dev->se_dev_attrib.block_size);
-
- if ((cmd->t_task_lba + sectors) > transport_dev_end_lba(dev)) {
- pr_err("LBA: %llu Sectors: %u exceeds"
- " transport_dev_end_lba(): %llu\n",
- cmd->t_task_lba, sectors,
- transport_dev_end_lba(dev));
- return -EINVAL;
- }
-
- return 0;
-}
-
/*
* Called from I/O completion to determine which dormant/delayed
* and ordered cmds need to have their tasks added to the execution queue.
*/
int transport_generic_new_cmd(struct se_cmd *cmd)
{
- struct se_device *dev = cmd->se_dev;
int ret = 0;
/*
return 0;
}
- if (cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) {
- struct se_dev_attrib *attr = &dev->se_sub_dev->se_dev_attrib;
-
- if (transport_cmd_get_valid_sectors(cmd) < 0)
- return -EINVAL;
-
- BUG_ON(cmd->data_length % attr->block_size);
- BUG_ON(DIV_ROUND_UP(cmd->data_length, attr->block_size) >
- attr->hw_max_sectors);
- }
-
atomic_inc(&cmd->t_fe_count);
/*
void (*free_device)(void *);
int (*transport_complete)(struct se_cmd *cmd, struct scatterlist *);
- int (*parse_cdb)(struct se_cmd *cmd, unsigned int *size);
+ int (*parse_cdb)(struct se_cmd *cmd);
int (*execute_cmd)(struct se_cmd *, struct scatterlist *, u32,
enum dma_data_direction);
int (*do_discard)(struct se_device *, sector_t, u32);
void target_complete_cmd(struct se_cmd *, u8);
-int sbc_parse_cdb(struct se_cmd *cmd, unsigned int *size);
-int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size, bool passthrough);
+int sbc_parse_cdb(struct se_cmd *cmd);
+int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size);
void transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);
int transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);
projects / platform / kernel / linux-3.10.git / commitdiff