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- /*
- * SCSI Primary Commands (SPC) parsing and emulation.
- *
- * (c) Copyright 2002-2013 Datera, Inc.
- *
- * 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_proto.h>
- #include <scsi/scsi_common.h>
- #include <scsi/scsi_tcq.h>
- #include <target/target_core_base.h>
- #include <target/target_core_backend.h>
- #include <target/target_core_fabric.h>
- #include "target_core_internal.h"
- #include "target_core_alua.h"
- #include "target_core_pr.h"
- #include "target_core_ua.h"
- #include "target_core_xcopy.h"
- static void spc_fill_alua_data(struct se_lun *lun, unsigned char *buf)
- {
- struct t10_alua_tg_pt_gp *tg_pt_gp;
- /*
- * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS.
- */
- buf[5] = 0x80;
- /*
- * Set TPGS field for explicit and/or implicit ALUA access type
- * and opteration.
- *
- * See spc4r17 section 6.4.2 Table 135
- */
- spin_lock(&lun->lun_tg_pt_gp_lock);
- tg_pt_gp = lun->lun_tg_pt_gp;
- if (tg_pt_gp)
- buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type;
- spin_unlock(&lun->lun_tg_pt_gp_lock);
- }
- sense_reason_t
- spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char *buf)
- {
- struct se_lun *lun = cmd->se_lun;
- struct se_device *dev = cmd->se_dev;
- struct se_session *sess = cmd->se_sess;
- /* Set RMB (removable media) for tape devices */
- if (dev->transport->get_device_type(dev) == TYPE_TAPE)
- buf[1] = 0x80;
- buf[2] = 0x05; /* SPC-3 */
- /*
- * 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
- */
- spc_fill_alua_data(lun, buf);
- /*
- * Set Third-Party Copy (3PC) bit to indicate support for EXTENDED_COPY
- */
- if (dev->dev_attrib.emulate_3pc)
- buf[5] |= 0x8;
- /*
- * Set Protection (PROTECT) bit when DIF has been enabled on the
- * device, and the fabric supports VERIFY + PASS. Also report
- * PROTECT=1 if sess_prot_type has been configured to allow T10-PI
- * to unprotected devices.
- */
- if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) {
- if (dev->dev_attrib.pi_prot_type || cmd->se_sess->sess_prot_type)
- buf[5] |= 0x1;
- }
- buf[7] = 0x2; /* CmdQue=1 */
- /*
- * ASCII data fields described as being left-aligned shall have any
- * unused bytes at the end of the field (i.e., highest offset) and the
- * unused bytes shall be filled with ASCII space characters (20h).
- */
- memset(&buf[8], 0x20, 8 + 16 + 4);
- memcpy(&buf[8], "LIO-ORG", sizeof("LIO-ORG") - 1);
- memcpy(&buf[16], dev->t10_wwn.model,
- strnlen(dev->t10_wwn.model, 16));
- memcpy(&buf[32], dev->t10_wwn.revision,
- strnlen(dev->t10_wwn.revision, 4));
- buf[4] = 31; /* Set additional length to 31 */
- return 0;
- }
- EXPORT_SYMBOL(spc_emulate_inquiry_std);
- /* unit serial number */
- static sense_reason_t
- spc_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf)
- {
- struct se_device *dev = cmd->se_dev;
- u16 len;
- if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) {
- len = sprintf(&buf[4], "%s", dev->t10_wwn.unit_serial);
- len++; /* Extra Byte for NULL Terminator */
- buf[3] = len;
- }
- return 0;
- }
- void spc_parse_naa_6h_vendor_specific(struct se_device *dev,
- unsigned char *buf)
- {
- unsigned char *p = &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.
- */
- sense_reason_t
- 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_portal_group *tpg = NULL;
- struct t10_alua_lu_gp_member *lu_gp_mem;
- struct t10_alua_tg_pt_gp *tg_pt_gp;
- unsigned char *prod = &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->dev_flags & DF_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->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) {
- unit_serial_len = strlen(&dev->t10_wwn.unit_serial[0]);
- unit_serial_len++; /* For NULL Terminator */
- id_len += sprintf(&buf[off+12], "%s:%s", prod,
- &dev->t10_wwn.unit_serial[0]);
- }
- buf[off] = 0x2; /* ASCII */
- buf[off+1] = 0x1; /* T10 Vendor ID */
- buf[off+2] = 0x0;
- /* left align Vendor ID and pad with spaces */
- memset(&buf[off+4], 0x20, 8);
- memcpy(&buf[off+4], "LIO-ORG", sizeof("LIO-ORG") - 1);
- /* 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);
- if (1) {
- struct t10_alua_lu_gp *lu_gp;
- u32 padding, scsi_name_len, scsi_target_len;
- u16 lu_gp_id = 0;
- u16 tg_pt_gp_id = 0;
- u16 tpgt;
- tpg = lun->lun_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->proto_id << 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++] = ((lun->lun_rtpi >> 8) & 0xff);
- buf[off++] = (lun->lun_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
- */
- spin_lock(&lun->lun_tg_pt_gp_lock);
- tg_pt_gp = lun->lun_tg_pt_gp;
- if (!tg_pt_gp) {
- spin_unlock(&lun->lun_tg_pt_gp_lock);
- goto check_lu_gp;
- }
- tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id;
- spin_unlock(&lun->lun_tg_pt_gp_lock);
- buf[off] = tpg->proto_id << 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:
- buf[off] = tpg->proto_id << 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.
- */
- padding = ((-scsi_name_len) & 3);
- if (padding)
- scsi_name_len += padding;
- if (scsi_name_len > 256)
- scsi_name_len = 256;
- buf[off-1] = scsi_name_len;
- off += scsi_name_len;
- /* Header size + Designation descriptor */
- len += (scsi_name_len + 4);
- /*
- * Target device designator
- */
- buf[off] = tpg->proto_id << 4;
- buf[off++] |= 0x3; /* CODE SET == UTF-8 */
- buf[off] = 0x80; /* Set PIV=1 */
- /* Set ASSOCIATION == target device: 10b */
- buf[off] |= 0x20;
- /* 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>" in
- * UTF-8 encoding.
- */
- scsi_target_len = sprintf(&buf[off], "%s",
- tpg->se_tpg_tfo->tpg_get_wwn(tpg));
- scsi_target_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.
- */
- padding = ((-scsi_target_len) & 3);
- if (padding)
- scsi_target_len += padding;
- if (scsi_target_len > 256)
- scsi_target_len = 256;
- buf[off-1] = scsi_target_len;
- off += scsi_target_len;
- /* Header size + Designation descriptor */
- len += (scsi_target_len + 4);
- }
- buf[2] = ((len >> 8) & 0xff);
- buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */
- return 0;
- }
- EXPORT_SYMBOL(spc_emulate_evpd_83);
- /* Extended INQUIRY Data VPD Page */
- static sense_reason_t
- spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf)
- {
- struct se_device *dev = cmd->se_dev;
- struct se_session *sess = cmd->se_sess;
- buf[3] = 0x3c;
- /*
- * Set GRD_CHK + REF_CHK for TYPE1 protection, or GRD_CHK
- * only for TYPE3 protection.
- */
- if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) {
- if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE1_PROT ||
- cmd->se_sess->sess_prot_type == TARGET_DIF_TYPE1_PROT)
- buf[4] = 0x5;
- else if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE3_PROT ||
- cmd->se_sess->sess_prot_type == TARGET_DIF_TYPE3_PROT)
- buf[4] = 0x4;
- }
- /* logical unit supports type 1 and type 3 protection */
- if ((dev->transport->get_device_type(dev) == TYPE_DISK) &&
- (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) &&
- (dev->dev_attrib.pi_prot_type || cmd->se_sess->sess_prot_type)) {
- buf[4] |= (0x3 << 3);
- }
- /* Set HEADSUP, ORDSUP, SIMPSUP */
- buf[5] = 0x07;
- /* If WriteCache emulation is enabled, set V_SUP */
- if (target_check_wce(dev))
- buf[6] = 0x01;
- /* If an LBA map is present set R_SUP */
- spin_lock(&cmd->se_dev->t10_alua.lba_map_lock);
- if (!list_empty(&dev->t10_alua.lba_map_list))
- buf[8] = 0x10;
- spin_unlock(&cmd->se_dev->t10_alua.lba_map_lock);
- return 0;
- }
- /* Block Limits VPD page */
- static sense_reason_t
- spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
- {
- struct se_device *dev = cmd->se_dev;
- u32 mtl = 0;
- int have_tp = 0, opt, min;
- /*
- * 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->dev_attrib.emulate_tpu || dev->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 MAXIMUM COMPARE AND WRITE LENGTH
- */
- if (dev->dev_attrib.emulate_caw)
- buf[5] = 0x01;
- /*
- * Set OPTIMAL TRANSFER LENGTH GRANULARITY
- */
- if (dev->transport->get_io_min && (min = dev->transport->get_io_min(dev)))
- put_unaligned_be16(min / dev->dev_attrib.block_size, &buf[6]);
- else
- put_unaligned_be16(1, &buf[6]);
- /*
- * Set MAXIMUM TRANSFER LENGTH
- *
- * XXX: Currently assumes single PAGE_SIZE per scatterlist for fabrics
- * enforcing maximum HW scatter-gather-list entry limit
- */
- if (cmd->se_tfo->max_data_sg_nents) {
- mtl = (cmd->se_tfo->max_data_sg_nents * PAGE_SIZE) /
- dev->dev_attrib.block_size;
- }
- put_unaligned_be32(min_not_zero(mtl, dev->dev_attrib.hw_max_sectors), &buf[8]);
- /*
- * Set OPTIMAL TRANSFER LENGTH
- */
- if (dev->transport->get_io_opt && (opt = dev->transport->get_io_opt(dev)))
- put_unaligned_be32(opt / dev->dev_attrib.block_size, &buf[12]);
- else
- put_unaligned_be32(dev->dev_attrib.optimal_sectors, &buf[12]);
- /*
- * Exit now if we don't support TP.
- */
- if (!have_tp)
- goto max_write_same;
- /*
- * Set MAXIMUM UNMAP LBA COUNT
- */
- put_unaligned_be32(dev->dev_attrib.max_unmap_lba_count, &buf[20]);
- /*
- * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT
- */
- put_unaligned_be32(dev->dev_attrib.max_unmap_block_desc_count,
- &buf[24]);
- /*
- * Set OPTIMAL UNMAP GRANULARITY
- */
- put_unaligned_be32(dev->dev_attrib.unmap_granularity, &buf[28]);
- /*
- * UNMAP GRANULARITY ALIGNMENT
- */
- put_unaligned_be32(dev->dev_attrib.unmap_granularity_alignment,
- &buf[32]);
- if (dev->dev_attrib.unmap_granularity_alignment != 0)
- buf[32] |= 0x80; /* Set the UGAVALID bit */
- /*
- * MAXIMUM WRITE SAME LENGTH
- */
- max_write_same:
- put_unaligned_be64(dev->dev_attrib.max_write_same_len, &buf[36]);
- return 0;
- }
- /* Block Device Characteristics VPD page */
- static sense_reason_t
- 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->dev_attrib.is_nonrot ? 1 : 0;
- return 0;
- }
- /* Thin Provisioning VPD */
- static sense_reason_t
- 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->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->dev_attrib.emulate_tpws != 0)
- buf[5] |= 0x40 | 0x20;
- return 0;
- }
- /* Referrals VPD page */
- static sense_reason_t
- spc_emulate_evpd_b3(struct se_cmd *cmd, unsigned char *buf)
- {
- struct se_device *dev = cmd->se_dev;
- buf[0] = dev->transport->get_device_type(dev);
- buf[3] = 0x0c;
- put_unaligned_be32(dev->t10_alua.lba_map_segment_size, &buf[8]);
- put_unaligned_be32(dev->t10_alua.lba_map_segment_multiplier, &buf[12]);
- return 0;
- }
- static sense_reason_t
- spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf);
- static struct {
- uint8_t page;
- sense_reason_t (*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 },
- { .page = 0xb3, .emulate = spc_emulate_evpd_b3 },
- };
- /* supported vital product data pages */
- static sense_reason_t
- 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->dev_flags & DF_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 sense_reason_t
- spc_emulate_inquiry(struct se_cmd *cmd)
- {
- struct se_device *dev = cmd->se_dev;
- struct se_portal_group *tpg = cmd->se_lun->lun_tpg;
- unsigned char *rbuf;
- unsigned char *cdb = cmd->t_task_cdb;
- unsigned char *buf;
- sense_reason_t ret;
- int p;
- int len = 0;
- buf = kzalloc(SE_INQUIRY_BUF, GFP_KERNEL);
- if (!buf) {
- pr_err("Unable to allocate response buffer for INQUIRY\n");
- return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
- }
- if (dev == rcu_access_pointer(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]);
- ret = TCM_INVALID_CDB_FIELD;
- goto out;
- }
- ret = spc_emulate_inquiry_std(cmd, buf);
- len = buf[4] + 5;
- 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);
- len = get_unaligned_be16(&buf[2]) + 4;
- goto out;
- }
- }
- pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]);
- ret = TCM_INVALID_CDB_FIELD;
- out:
- rbuf = transport_kmap_data_sg(cmd);
- if (rbuf) {
- memcpy(rbuf, buf, min_t(u32, SE_INQUIRY_BUF, cmd->data_length));
- transport_kunmap_data_sg(cmd);
- }
- kfree(buf);
- if (!ret)
- target_complete_cmd_with_length(cmd, GOOD, len);
- return ret;
- }
- static int spc_modesense_rwrecovery(struct se_cmd *cmd, u8 pc, u8 *p)
- {
- p[0] = 0x01;
- p[1] = 0x0a;
- /* No changeable values for now */
- if (pc == 1)
- goto out;
- out:
- return 12;
- }
- static int spc_modesense_control(struct se_cmd *cmd, u8 pc, u8 *p)
- {
- struct se_device *dev = cmd->se_dev;
- struct se_session *sess = cmd->se_sess;
- p[0] = 0x0a;
- p[1] = 0x0a;
- /* No changeable values for now */
- if (pc == 1)
- goto out;
- /* GLTSD: No implicit save of log parameters */
- p[2] = (1 << 1);
- if (target_sense_desc_format(dev))
- /* D_SENSE: Descriptor format sense data for 64bit sectors */
- p[2] |= (1 << 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->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->dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 :
- (dev->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->dev_attrib.emulate_tas) ? 0x40 : 0x00;
- /*
- * From spc4r30, section 7.5.7 Control mode page
- *
- * Application Tag Owner (ATO) bit set to one.
- *
- * If the ATO bit is set to one the device server shall not modify the
- * LOGICAL BLOCK APPLICATION TAG field and, depending on the protection
- * type, shall not modify the contents of the LOGICAL BLOCK REFERENCE
- * TAG field.
- */
- if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) {
- if (dev->dev_attrib.pi_prot_type || sess->sess_prot_type)
- p[5] |= 0x80;
- }
- p[8] = 0xff;
- p[9] = 0xff;
- p[11] = 30;
- out:
- return 12;
- }
- static int spc_modesense_caching(struct se_cmd *cmd, u8 pc, u8 *p)
- {
- struct se_device *dev = cmd->se_dev;
- p[0] = 0x08;
- p[1] = 0x12;
- /* No changeable values for now */
- if (pc == 1)
- goto out;
- if (target_check_wce(dev))
- p[2] = 0x04; /* Write Cache Enable */
- p[12] = 0x20; /* Disabled Read Ahead */
- out:
- return 20;
- }
- static int spc_modesense_informational_exceptions(struct se_cmd *cmd, u8 pc, unsigned char *p)
- {
- p[0] = 0x1c;
- p[1] = 0x0a;
- /* No changeable values for now */
- if (pc == 1)
- goto out;
- out:
- return 12;
- }
- static struct {
- uint8_t page;
- uint8_t subpage;
- int (*emulate)(struct se_cmd *, u8, unsigned char *);
- } modesense_handlers[] = {
- { .page = 0x01, .subpage = 0x00, .emulate = spc_modesense_rwrecovery },
- { .page = 0x08, .subpage = 0x00, .emulate = spc_modesense_caching },
- { .page = 0x0a, .subpage = 0x00, .emulate = spc_modesense_control },
- { .page = 0x1c, .subpage = 0x00, .emulate = spc_modesense_informational_exceptions },
- };
- 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_modesense_blockdesc(unsigned char *buf, u64 blocks, u32 block_size)
- {
- *buf++ = 8;
- put_unaligned_be32(min(blocks, 0xffffffffull), buf);
- buf += 4;
- put_unaligned_be32(block_size, buf);
- return 9;
- }
- static int spc_modesense_long_blockdesc(unsigned char *buf, u64 blocks, u32 block_size)
- {
- if (blocks <= 0xffffffff)
- return spc_modesense_blockdesc(buf + 3, blocks, block_size) + 3;
- *buf++ = 1; /* LONGLBA */
- buf += 2;
- *buf++ = 16;
- put_unaligned_be64(blocks, buf);
- buf += 12;
- put_unaligned_be32(block_size, buf);
- return 17;
- }
- static sense_reason_t spc_emulate_modesense(struct se_cmd *cmd)
- {
- struct se_device *dev = cmd->se_dev;
- char *cdb = cmd->t_task_cdb;
- unsigned char buf[SE_MODE_PAGE_BUF], *rbuf;
- int type = dev->transport->get_device_type(dev);
- int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10);
- bool dbd = !!(cdb[1] & 0x08);
- bool llba = ten ? !!(cdb[1] & 0x10) : false;
- u8 pc = cdb[2] >> 6;
- u8 page = cdb[2] & 0x3f;
- u8 subpage = cdb[3];
- int length = 0;
- int ret;
- int i;
- bool read_only = target_lun_is_rdonly(cmd);;
- memset(buf, 0, SE_MODE_PAGE_BUF);
- /*
- * Skip over MODE DATA LENGTH + MEDIUM TYPE fields to byte 3 for
- * MODE_SENSE_10 and byte 2 for MODE_SENSE (6).
- */
- length = ten ? 3 : 2;
- /* DEVICE-SPECIFIC PARAMETER */
- if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || read_only)
- spc_modesense_write_protect(&buf[length], type);
- /*
- * SBC only allows us to enable FUA and DPO together. Fortunately
- * DPO is explicitly specified as a hint, so a noop is a perfectly
- * valid implementation.
- */
- if (target_check_fua(dev))
- spc_modesense_dpofua(&buf[length], type);
- ++length;
- /* BLOCK DESCRIPTOR */
- /*
- * For now we only include a block descriptor for disk (SBC)
- * devices; other command sets use a slightly different format.
- */
- if (!dbd && type == TYPE_DISK) {
- u64 blocks = dev->transport->get_blocks(dev);
- u32 block_size = dev->dev_attrib.block_size;
- if (ten) {
- if (llba) {
- length += spc_modesense_long_blockdesc(&buf[length],
- blocks, block_size);
- } else {
- length += 3;
- length += spc_modesense_blockdesc(&buf[length],
- blocks, block_size);
- }
- } else {
- length += spc_modesense_blockdesc(&buf[length], blocks,
- block_size);
- }
- } else {
- if (ten)
- length += 4;
- else
- length += 1;
- }
- if (page == 0x3f) {
- if (subpage != 0x00 && subpage != 0xff) {
- pr_warn("MODE_SENSE: Invalid subpage code: 0x%02x\n", subpage);
- return TCM_INVALID_CDB_FIELD;
- }
- for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) {
- /*
- * Tricky way to say all subpage 00h for
- * subpage==0, all subpages for subpage==0xff
- * (and we just checked above that those are
- * the only two possibilities).
- */
- if ((modesense_handlers[i].subpage & ~subpage) == 0) {
- ret = modesense_handlers[i].emulate(cmd, pc, &buf[length]);
- if (!ten && length + ret >= 255)
- break;
- length += ret;
- }
- }
- goto set_length;
- }
- for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i)
- if (modesense_handlers[i].page == page &&
- modesense_handlers[i].subpage == subpage) {
- length += modesense_handlers[i].emulate(cmd, pc, &buf[length]);
- goto set_length;
- }
- /*
- * We don't intend to implement:
- * - obsolete page 03h "format parameters" (checked by Solaris)
- */
- if (page != 0x03)
- pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n",
- page, subpage);
- return TCM_UNKNOWN_MODE_PAGE;
- set_length:
- if (ten)
- put_unaligned_be16(length - 2, buf);
- else
- buf[0] = length - 1;
- rbuf = transport_kmap_data_sg(cmd);
- if (rbuf) {
- memcpy(rbuf, buf, min_t(u32, SE_MODE_PAGE_BUF, cmd->data_length));
- transport_kunmap_data_sg(cmd);
- }
- target_complete_cmd_with_length(cmd, GOOD, length);
- return 0;
- }
- static sense_reason_t spc_emulate_modeselect(struct se_cmd *cmd)
- {
- char *cdb = cmd->t_task_cdb;
- bool ten = cdb[0] == MODE_SELECT_10;
- int off = ten ? 8 : 4;
- bool pf = !!(cdb[1] & 0x10);
- u8 page, subpage;
- unsigned char *buf;
- unsigned char tbuf[SE_MODE_PAGE_BUF];
- int length;
- sense_reason_t ret = 0;
- int i;
- if (!cmd->data_length) {
- target_complete_cmd(cmd, GOOD);
- return 0;
- }
- if (cmd->data_length < off + 2)
- return TCM_PARAMETER_LIST_LENGTH_ERROR;
- buf = transport_kmap_data_sg(cmd);
- if (!buf)
- return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
- if (!pf) {
- ret = TCM_INVALID_CDB_FIELD;
- goto out;
- }
- page = buf[off] & 0x3f;
- subpage = buf[off] & 0x40 ? buf[off + 1] : 0;
- for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i)
- if (modesense_handlers[i].page == page &&
- modesense_handlers[i].subpage == subpage) {
- memset(tbuf, 0, SE_MODE_PAGE_BUF);
- length = modesense_handlers[i].emulate(cmd, 0, tbuf);
- goto check_contents;
- }
- ret = TCM_UNKNOWN_MODE_PAGE;
- goto out;
- check_contents:
- if (cmd->data_length < off + length) {
- ret = TCM_PARAMETER_LIST_LENGTH_ERROR;
- goto out;
- }
- if (memcmp(buf + off, tbuf, length))
- ret = TCM_INVALID_PARAMETER_LIST;
- out:
- transport_kunmap_data_sg(cmd);
- if (!ret)
- target_complete_cmd(cmd, GOOD);
- return ret;
- }
- static sense_reason_t spc_emulate_request_sense(struct se_cmd *cmd)
- {
- unsigned char *cdb = cmd->t_task_cdb;
- unsigned char *rbuf;
- u8 ua_asc = 0, ua_ascq = 0;
- unsigned char buf[SE_SENSE_BUF];
- bool desc_format = target_sense_desc_format(cmd->se_dev);
- memset(buf, 0, SE_SENSE_BUF);
- if (cdb[1] & 0x01) {
- pr_err("REQUEST_SENSE description emulation not"
- " supported\n");
- return TCM_INVALID_CDB_FIELD;
- }
- rbuf = transport_kmap_data_sg(cmd);
- if (!rbuf)
- return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
- if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq))
- scsi_build_sense_buffer(desc_format, buf, UNIT_ATTENTION,
- ua_asc, ua_ascq);
- else
- scsi_build_sense_buffer(desc_format, buf, NO_SENSE, 0x0, 0x0);
- memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length));
- transport_kunmap_data_sg(cmd);
- target_complete_cmd(cmd, GOOD);
- return 0;
- }
- sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd)
- {
- struct se_dev_entry *deve;
- struct se_session *sess = cmd->se_sess;
- struct se_node_acl *nacl;
- struct scsi_lun slun;
- unsigned char *buf;
- u32 lun_count = 0, offset = 8;
- __be32 len;
- buf = transport_kmap_data_sg(cmd);
- if (cmd->data_length && !buf)
- return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
- /*
- * If no struct se_session pointer is present, this struct se_cmd is
- * coming via a target_core_mod PASSTHROUGH op, and not through
- * a $FABRIC_MOD. In that case, report LUN=0 only.
- */
- if (!sess)
- goto done;
- nacl = sess->se_node_acl;
- rcu_read_lock();
- hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) {
- /*
- * We determine the correct LUN LIST LENGTH even once we
- * have reached the initial allocation length.
- * See SPC2-R20 7.19.
- */
- lun_count++;
- if (offset >= cmd->data_length)
- continue;
- int_to_scsilun(deve->mapped_lun, &slun);
- memcpy(buf + offset, &slun,
- min(8u, cmd->data_length - offset));
- offset += 8;
- }
- rcu_read_unlock();
- /*
- * See SPC3 r07, page 159.
- */
- done:
- /*
- * If no LUNs are accessible, report virtual LUN 0.
- */
- if (lun_count == 0) {
- int_to_scsilun(0, &slun);
- if (cmd->data_length > 8)
- memcpy(buf + offset, &slun,
- min(8u, cmd->data_length - offset));
- lun_count = 1;
- }
- if (buf) {
- len = cpu_to_be32(lun_count * 8);
- memcpy(buf, &len, min_t(int, sizeof len, cmd->data_length));
- transport_kunmap_data_sg(cmd);
- }
- target_complete_cmd_with_length(cmd, GOOD, 8 + lun_count * 8);
- return 0;
- }
- EXPORT_SYMBOL(spc_emulate_report_luns);
- static sense_reason_t
- spc_emulate_testunitready(struct se_cmd *cmd)
- {
- target_complete_cmd(cmd, GOOD);
- return 0;
- }
- sense_reason_t
- spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
- {
- struct se_device *dev = cmd->se_dev;
- unsigned char *cdb = cmd->t_task_cdb;
- switch (cdb[0]) {
- case MODE_SELECT:
- *size = cdb[4];
- cmd->execute_cmd = spc_emulate_modeselect;
- break;
- case MODE_SELECT_10:
- *size = (cdb[7] << 8) + cdb[8];
- cmd->execute_cmd = spc_emulate_modeselect;
- break;
- case MODE_SENSE:
- *size = cdb[4];
- cmd->execute_cmd = spc_emulate_modesense;
- break;
- case MODE_SENSE_10:
- *size = (cdb[7] << 8) + cdb[8];
- cmd->execute_cmd = spc_emulate_modesense;
- break;
- case LOG_SELECT:
- case LOG_SENSE:
- *size = (cdb[7] << 8) + cdb[8];
- break;
- case PERSISTENT_RESERVE_IN:
- *size = (cdb[7] << 8) + cdb[8];
- cmd->execute_cmd = target_scsi3_emulate_pr_in;
- break;
- case PERSISTENT_RESERVE_OUT:
- *size = (cdb[7] << 8) + cdb[8];
- cmd->execute_cmd = target_scsi3_emulate_pr_out;
- break;
- case RELEASE:
- case RELEASE_10:
- if (cdb[0] == RELEASE_10)
- *size = (cdb[7] << 8) | cdb[8];
- else
- *size = cmd->data_length;
- cmd->execute_cmd = target_scsi2_reservation_release;
- break;
- case RESERVE:
- case RESERVE_10:
- /*
- * The SPC-2 RESERVE does not contain a size in the SCSI CDB.
- * Assume the passthrough or $FABRIC_MOD will tell us about it.
- */
- if (cdb[0] == RESERVE_10)
- *size = (cdb[7] << 8) | cdb[8];
- else
- *size = cmd->data_length;
- cmd->execute_cmd = target_scsi2_reservation_reserve;
- break;
- case REQUEST_SENSE:
- *size = cdb[4];
- cmd->execute_cmd = spc_emulate_request_sense;
- break;
- case INQUIRY:
- *size = (cdb[3] << 8) + cdb[4];
- /*
- * Do implicit HEAD_OF_QUEUE processing for INQUIRY.
- * See spc4r17 section 5.3
- */
- cmd->sam_task_attr = TCM_HEAD_TAG;
- cmd->execute_cmd = spc_emulate_inquiry;
- break;
- case SECURITY_PROTOCOL_IN:
- case SECURITY_PROTOCOL_OUT:
- *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
- break;
- case EXTENDED_COPY:
- *size = get_unaligned_be32(&cdb[10]);
- cmd->execute_cmd = target_do_xcopy;
- break;
- case RECEIVE_COPY_RESULTS:
- *size = get_unaligned_be32(&cdb[10]);
- cmd->execute_cmd = target_do_receive_copy_results;
- break;
- case READ_ATTRIBUTE:
- case WRITE_ATTRIBUTE:
- *size = (cdb[10] << 24) | (cdb[11] << 16) |
- (cdb[12] << 8) | cdb[13];
- break;
- case RECEIVE_DIAGNOSTIC:
- case SEND_DIAGNOSTIC:
- *size = (cdb[3] << 8) | cdb[4];
- break;
- case WRITE_BUFFER:
- *size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8];
- break;
- case REPORT_LUNS:
- cmd->execute_cmd = spc_emulate_report_luns;
- *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
- /*
- * Do implicit HEAD_OF_QUEUE processing for REPORT_LUNS
- * See spc4r17 section 5.3
- */
- cmd->sam_task_attr = TCM_HEAD_TAG;
- break;
- case TEST_UNIT_READY:
- cmd->execute_cmd = spc_emulate_testunitready;
- *size = 0;
- break;
- case MAINTENANCE_IN:
- if (dev->transport->get_device_type(dev) != TYPE_ROM) {
- /*
- * MAINTENANCE_IN from SCC-2
- * Check for emulated MI_REPORT_TARGET_PGS
- */
- if ((cdb[1] & 0x1f) == MI_REPORT_TARGET_PGS) {
- cmd->execute_cmd =
- target_emulate_report_target_port_groups;
- }
- *size = get_unaligned_be32(&cdb[6]);
- } else {
- /*
- * GPCMD_SEND_KEY from multi media commands
- */
- *size = get_unaligned_be16(&cdb[8]);
- }
- break;
- case MAINTENANCE_OUT:
- if (dev->transport->get_device_type(dev) != TYPE_ROM) {
- /*
- * MAINTENANCE_OUT from SCC-2
- * Check for emulated MO_SET_TARGET_PGS.
- */
- if (cdb[1] == MO_SET_TARGET_PGS) {
- cmd->execute_cmd =
- target_emulate_set_target_port_groups;
- }
- *size = get_unaligned_be32(&cdb[6]);
- } else {
- /*
- * GPCMD_SEND_KEY from multi media commands
- */
- *size = get_unaligned_be16(&cdb[8]);
- }
- break;
- default:
- return TCM_UNSUPPORTED_SCSI_OPCODE;
- }
- return 0;
- }
- EXPORT_SYMBOL(spc_parse_cdb);
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