Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2434 insertions, 0 deletions

diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c
new file mode 100644
index 000000000..50290abc0
--- /dev/null
+++ b/drivers/target/target_core_spc.c
@@ -0,0 +1,2434 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * SCSI Primary Commands (SPC) parsing and emulation.
+ *
+ * (c) Copyright 2002-2013 Datera, Inc.
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ */
+
+#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
+	 */
+	rcu_read_lock();
+	tg_pt_gp = rcu_dereference(lun->lun_tg_pt_gp);
+	if (tg_pt_gp)
+		buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type;
+	rcu_read_unlock();
+}
+
+static u16
+spc_find_scsi_transport_vd(int proto_id)
+{
+	switch (proto_id) {
+	case SCSI_PROTOCOL_FCP:
+		return SCSI_VERSION_DESCRIPTOR_FCP4;
+	case SCSI_PROTOCOL_ISCSI:
+		return SCSI_VERSION_DESCRIPTOR_ISCSI;
+	case SCSI_PROTOCOL_SAS:
+		return SCSI_VERSION_DESCRIPTOR_SAS3;
+	case SCSI_PROTOCOL_SBP:
+		return SCSI_VERSION_DESCRIPTOR_SBP3;
+	case SCSI_PROTOCOL_SRP:
+		return SCSI_VERSION_DESCRIPTOR_SRP;
+	default:
+		pr_warn("Cannot find VERSION DESCRIPTOR value for unknown SCSI"
+			" transport PROTOCOL IDENTIFIER %#x\n", proto_id);
+		return 0;
+	}
+}
+
+sense_reason_t
+spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char *buf)
+{
+	struct se_lun *lun = cmd->se_lun;
+	struct se_portal_group *tpg = lun->lun_tpg;
+	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] = 0x06; /* SPC-4 */
+
+	/*
+	 * 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;
+	}
+
+	/*
+	 * Set MULTIP bit to indicate presence of multiple SCSI target ports
+	 */
+	if (dev->export_count > 1)
+		buf[6] |= 0x10;
+
+	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,
+	       INQUIRY_VENDOR_LEN + INQUIRY_MODEL_LEN + INQUIRY_REVISION_LEN);
+	memcpy(&buf[8], dev->t10_wwn.vendor,
+	       strnlen(dev->t10_wwn.vendor, INQUIRY_VENDOR_LEN));
+	memcpy(&buf[16], dev->t10_wwn.model,
+	       strnlen(dev->t10_wwn.model, INQUIRY_MODEL_LEN));
+	memcpy(&buf[32], dev->t10_wwn.revision,
+	       strnlen(dev->t10_wwn.revision, INQUIRY_REVISION_LEN));
+
+	/*
+	 * Set the VERSION DESCRIPTOR fields
+	 */
+	put_unaligned_be16(SCSI_VERSION_DESCRIPTOR_SAM5, &buf[58]);
+	put_unaligned_be16(spc_find_scsi_transport_vd(tpg->proto_id), &buf[60]);
+	put_unaligned_be16(SCSI_VERSION_DESCRIPTOR_SPC4, &buf[62]);
+	if (cmd->se_dev->transport->get_device_type(dev) == TYPE_DISK)
+		put_unaligned_be16(SCSI_VERSION_DESCRIPTOR_SBC3, &buf[64]);
+
+	buf[4] = 91; /* Set additional length to 91 */
+
+	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;
+}
+
+/*
+ * Generate NAA IEEE Registered Extended designator
+ */
+void spc_gen_naa_6h_vendor_specific(struct se_device *dev,
+				    unsigned char *buf)
+{
+	unsigned char *p = &dev->t10_wwn.unit_serial[0];
+	u32 company_id = dev->t10_wwn.company_id;
+	int cnt, off = 0;
+	bool next = true;
+
+	/*
+	 * Start NAA IEEE Registered Extended Identifier/Designator
+	 */
+	buf[off] = 0x6 << 4;
+
+	/* IEEE COMPANY_ID */
+	buf[off++] |= (company_id >> 20) & 0xf;
+	buf[off++] = (company_id >> 12) & 0xff;
+	buf[off++] = (company_id >> 4) & 0xff;
+	buf[off] = (company_id & 0xf) << 4;
+
+	/*
+	 * 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 = off + 13; *p && off < cnt; p++) {
+		int val = hex_to_bin(*p);
+
+		if (val < 0)
+			continue;
+
+		if (next) {
+			next = false;
+			buf[off++] |= val;
+		} else {
+			next = true;
+			buf[off] = 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 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;
+
+	/* NAA IEEE Registered Extended designator */
+	spc_gen_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 */
+
+	if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL)
+		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, INQUIRY_VENDOR_LEN);
+	memcpy(&buf[off+4], dev->t10_wwn.vendor,
+	       strnlen(dev->t10_wwn.vendor, INQUIRY_VENDOR_LEN));
+	/* 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;
+		put_unaligned_be16(lun->lun_tpg->tpg_rtpi, &buf[off]);
+		off += 2;
+		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
+		 */
+		rcu_read_lock();
+		tg_pt_gp = rcu_dereference(lun->lun_tg_pt_gp);
+		if (!tg_pt_gp) {
+			rcu_read_unlock();
+			goto check_lu_gp;
+		}
+		tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id;
+		rcu_read_unlock();
+
+		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 */
+		put_unaligned_be16(tg_pt_gp_id, &buf[off]);
+		off += 2;
+		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 */
+		put_unaligned_be16(lu_gp_id, &buf[off]);
+		off += 2;
+		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);
+	}
+	put_unaligned_be16(len, &buf[2]); /* 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;
+	u32 io_max_blocks;
+
+	/*
+	 * 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;
+	}
+	io_max_blocks = mult_frac(dev->dev_attrib.hw_max_sectors,
+			dev->dev_attrib.hw_block_size,
+			dev->dev_attrib.block_size);
+	put_unaligned_be32(min_not_zero(mtl, io_max_blocks), &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;
+
+	/*
+	 * The unmap_zeroes_data set means that the underlying device supports
+	 * REQ_OP_DISCARD and has the discard_zeroes_data bit set. This
+	 * satisfies the SBC requirements for LBPRZ, meaning that a subsequent
+	 * read will return zeroes after an UNMAP or WRITE SAME (16) to an LBA
+	 * See sbc4r36 6.6.4.
+	 */
+	if (((dev->dev_attrib.emulate_tpu != 0) ||
+	     (dev->dev_attrib.emulate_tpws != 0)) &&
+	     (dev->dev_attrib.unmap_zeroes_data != 0))
+		buf[5] |= 0x04;
+
+	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;
+	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;
+	}
+
+	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_debug("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, SAM_STAT_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.
+	 */
+	switch (dev->dev_attrib.emulate_ua_intlck_ctrl) {
+	case TARGET_UA_INTLCK_CTRL_ESTABLISH_UA:
+		p[4] = 0x30;
+		break;
+	case TARGET_UA_INTLCK_CTRL_NO_CLEAR:
+		p[4] = 0x20;
+		break;
+	default:	/* TARGET_UA_INTLCK_CTRL_CLEAR */
+		p[4] = 0x00;
+		break;
+	}
+	/*
+	 * 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;
+
+	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_ro || target_lun_is_rdonly(cmd))
+		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, SAM_STAT_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, SAM_STAT_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, SAM_STAT_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, SAM_STAT_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, SAM_STAT_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, SAM_STAT_GOOD);
+	return 0;
+}
+
+static void set_dpofua_usage_bits(u8 *usage_bits, struct se_device *dev)
+{
+	if (!target_check_fua(dev))
+		usage_bits[1] &= ~0x18;
+	else
+		usage_bits[1] |= 0x18;
+}
+
+static void set_dpofua_usage_bits32(u8 *usage_bits, struct se_device *dev)
+{
+	if (!target_check_fua(dev))
+		usage_bits[10] &= ~0x18;
+	else
+		usage_bits[10] |= 0x18;
+}
+
+static struct target_opcode_descriptor tcm_opcode_read6 = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = READ_6,
+	.cdb_size = 6,
+	.usage_bits = {READ_6, 0x1f, 0xff, 0xff,
+		       0xff, SCSI_CONTROL_MASK},
+};
+
+static struct target_opcode_descriptor tcm_opcode_read10 = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = READ_10,
+	.cdb_size = 10,
+	.usage_bits = {READ_10, 0xf8, 0xff, 0xff,
+		       0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff,
+		       0xff, SCSI_CONTROL_MASK},
+	.update_usage_bits = set_dpofua_usage_bits,
+};
+
+static struct target_opcode_descriptor tcm_opcode_read12 = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = READ_12,
+	.cdb_size = 12,
+	.usage_bits = {READ_12, 0xf8, 0xff, 0xff,
+		       0xff, 0xff, 0xff, 0xff,
+		       0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
+	.update_usage_bits = set_dpofua_usage_bits,
+};
+
+static struct target_opcode_descriptor tcm_opcode_read16 = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = READ_16,
+	.cdb_size = 16,
+	.usage_bits = {READ_16, 0xf8, 0xff, 0xff,
+		       0xff, 0xff, 0xff, 0xff,
+		       0xff, 0xff, 0xff, 0xff,
+		       0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
+	.update_usage_bits = set_dpofua_usage_bits,
+};
+
+static struct target_opcode_descriptor tcm_opcode_write6 = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = WRITE_6,
+	.cdb_size = 6,
+	.usage_bits = {WRITE_6, 0x1f, 0xff, 0xff,
+		       0xff, SCSI_CONTROL_MASK},
+};
+
+static struct target_opcode_descriptor tcm_opcode_write10 = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = WRITE_10,
+	.cdb_size = 10,
+	.usage_bits = {WRITE_10, 0xf8, 0xff, 0xff,
+		       0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff,
+		       0xff, SCSI_CONTROL_MASK},
+	.update_usage_bits = set_dpofua_usage_bits,
+};
+
+static struct target_opcode_descriptor tcm_opcode_write_verify10 = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = WRITE_VERIFY,
+	.cdb_size = 10,
+	.usage_bits = {WRITE_VERIFY, 0xf0, 0xff, 0xff,
+		       0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff,
+		       0xff, SCSI_CONTROL_MASK},
+	.update_usage_bits = set_dpofua_usage_bits,
+};
+
+static struct target_opcode_descriptor tcm_opcode_write12 = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = WRITE_12,
+	.cdb_size = 12,
+	.usage_bits = {WRITE_12, 0xf8, 0xff, 0xff,
+		       0xff, 0xff, 0xff, 0xff,
+		       0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
+	.update_usage_bits = set_dpofua_usage_bits,
+};
+
+static struct target_opcode_descriptor tcm_opcode_write16 = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = WRITE_16,
+	.cdb_size = 16,
+	.usage_bits = {WRITE_16, 0xf8, 0xff, 0xff,
+		       0xff, 0xff, 0xff, 0xff,
+		       0xff, 0xff, 0xff, 0xff,
+		       0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
+	.update_usage_bits = set_dpofua_usage_bits,
+};
+
+static struct target_opcode_descriptor tcm_opcode_write_verify16 = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = WRITE_VERIFY_16,
+	.cdb_size = 16,
+	.usage_bits = {WRITE_VERIFY_16, 0xf0, 0xff, 0xff,
+		       0xff, 0xff, 0xff, 0xff,
+		       0xff, 0xff, 0xff, 0xff,
+		       0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
+	.update_usage_bits = set_dpofua_usage_bits,
+};
+
+static bool tcm_is_ws_enabled(struct target_opcode_descriptor *descr,
+			      struct se_cmd *cmd)
+{
+	struct exec_cmd_ops *ops = cmd->protocol_data;
+	struct se_device *dev = cmd->se_dev;
+
+	return (dev->dev_attrib.emulate_tpws && !!ops->execute_unmap) ||
+	       !!ops->execute_write_same;
+}
+
+static struct target_opcode_descriptor tcm_opcode_write_same32 = {
+	.support = SCSI_SUPPORT_FULL,
+	.serv_action_valid = 1,
+	.opcode = VARIABLE_LENGTH_CMD,
+	.service_action = WRITE_SAME_32,
+	.cdb_size = 32,
+	.usage_bits = {VARIABLE_LENGTH_CMD, SCSI_CONTROL_MASK, 0x00, 0x00,
+		       0x00, 0x00, SCSI_GROUP_NUMBER_MASK, 0x18,
+		       0x00, WRITE_SAME_32, 0xe8, 0x00,
+		       0xff, 0xff, 0xff, 0xff,
+		       0xff, 0xff, 0xff, 0xff,
+		       0x00, 0x00, 0x00, 0x00,
+		       0x00, 0x00, 0x00, 0x00,
+		       0xff, 0xff, 0xff, 0xff},
+	.enabled = tcm_is_ws_enabled,
+	.update_usage_bits = set_dpofua_usage_bits32,
+};
+
+static bool tcm_is_caw_enabled(struct target_opcode_descriptor *descr,
+			       struct se_cmd *cmd)
+{
+	struct se_device *dev = cmd->se_dev;
+
+	return dev->dev_attrib.emulate_caw;
+}
+
+static struct target_opcode_descriptor tcm_opcode_compare_write = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = COMPARE_AND_WRITE,
+	.cdb_size = 16,
+	.usage_bits = {COMPARE_AND_WRITE, 0x18, 0xff, 0xff,
+		       0xff, 0xff, 0xff, 0xff,
+		       0xff, 0xff, 0x00, 0x00,
+		       0x00, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
+	.enabled = tcm_is_caw_enabled,
+	.update_usage_bits = set_dpofua_usage_bits,
+};
+
+static struct target_opcode_descriptor tcm_opcode_read_capacity = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = READ_CAPACITY,
+	.cdb_size = 10,
+	.usage_bits = {READ_CAPACITY, 0x00, 0xff, 0xff,
+		       0xff, 0xff, 0x00, 0x00,
+		       0x01, SCSI_CONTROL_MASK},
+};
+
+static struct target_opcode_descriptor tcm_opcode_read_capacity16 = {
+	.support = SCSI_SUPPORT_FULL,
+	.serv_action_valid = 1,
+	.opcode = SERVICE_ACTION_IN_16,
+	.service_action = SAI_READ_CAPACITY_16,
+	.cdb_size = 16,
+	.usage_bits = {SERVICE_ACTION_IN_16, SAI_READ_CAPACITY_16, 0x00, 0x00,
+		       0x00, 0x00, 0x00, 0x00,
+		       0x00, 0x00, 0xff, 0xff,
+		       0xff, 0xff, 0x00, SCSI_CONTROL_MASK},
+};
+
+static bool tcm_is_rep_ref_enabled(struct target_opcode_descriptor *descr,
+				   struct se_cmd *cmd)
+{
+	struct se_device *dev = cmd->se_dev;
+
+	spin_lock(&dev->t10_alua.lba_map_lock);
+	if (list_empty(&dev->t10_alua.lba_map_list)) {
+		spin_unlock(&dev->t10_alua.lba_map_lock);
+		return false;
+	}
+	spin_unlock(&dev->t10_alua.lba_map_lock);
+	return true;
+}
+
+static struct target_opcode_descriptor tcm_opcode_read_report_refferals = {
+	.support = SCSI_SUPPORT_FULL,
+	.serv_action_valid = 1,
+	.opcode = SERVICE_ACTION_IN_16,
+	.service_action = SAI_REPORT_REFERRALS,
+	.cdb_size = 16,
+	.usage_bits = {SERVICE_ACTION_IN_16, SAI_REPORT_REFERRALS, 0x00, 0x00,
+		       0x00, 0x00, 0x00, 0x00,
+		       0x00, 0x00, 0xff, 0xff,
+		       0xff, 0xff, 0x00, SCSI_CONTROL_MASK},
+	.enabled = tcm_is_rep_ref_enabled,
+};
+
+static struct target_opcode_descriptor tcm_opcode_sync_cache = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = SYNCHRONIZE_CACHE,
+	.cdb_size = 10,
+	.usage_bits = {SYNCHRONIZE_CACHE, 0x02, 0xff, 0xff,
+		       0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff,
+		       0xff, SCSI_CONTROL_MASK},
+};
+
+static struct target_opcode_descriptor tcm_opcode_sync_cache16 = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = SYNCHRONIZE_CACHE_16,
+	.cdb_size = 16,
+	.usage_bits = {SYNCHRONIZE_CACHE_16, 0x02, 0xff, 0xff,
+		       0xff, 0xff, 0xff, 0xff,
+		       0xff, 0xff, 0xff, 0xff,
+		       0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
+};
+
+static bool tcm_is_unmap_enabled(struct target_opcode_descriptor *descr,
+				 struct se_cmd *cmd)
+{
+	struct exec_cmd_ops *ops = cmd->protocol_data;
+	struct se_device *dev = cmd->se_dev;
+
+	return ops->execute_unmap && dev->dev_attrib.emulate_tpu;
+}
+
+static struct target_opcode_descriptor tcm_opcode_unmap = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = UNMAP,
+	.cdb_size = 10,
+	.usage_bits = {UNMAP, 0x00, 0x00, 0x00,
+		       0x00, 0x00, SCSI_GROUP_NUMBER_MASK, 0xff,
+		       0xff, SCSI_CONTROL_MASK},
+	.enabled = tcm_is_unmap_enabled,
+};
+
+static struct target_opcode_descriptor tcm_opcode_write_same = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = WRITE_SAME,
+	.cdb_size = 10,
+	.usage_bits = {WRITE_SAME, 0xe8, 0xff, 0xff,
+		       0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff,
+		       0xff, SCSI_CONTROL_MASK},
+	.enabled = tcm_is_ws_enabled,
+};
+
+static struct target_opcode_descriptor tcm_opcode_write_same16 = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = WRITE_SAME_16,
+	.cdb_size = 16,
+	.usage_bits = {WRITE_SAME_16, 0xe8, 0xff, 0xff,
+		       0xff, 0xff, 0xff, 0xff,
+		       0xff, 0xff, 0xff, 0xff,
+		       0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
+	.enabled = tcm_is_ws_enabled,
+};
+
+static struct target_opcode_descriptor tcm_opcode_verify = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = VERIFY,
+	.cdb_size = 10,
+	.usage_bits = {VERIFY, 0x00, 0xff, 0xff,
+		       0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff,
+		       0xff, SCSI_CONTROL_MASK},
+};
+
+static struct target_opcode_descriptor tcm_opcode_verify16 = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = VERIFY_16,
+	.cdb_size = 16,
+	.usage_bits = {VERIFY_16, 0x00, 0xff, 0xff,
+		       0xff, 0xff, 0xff, 0xff,
+		       0xff, 0xff, 0xff, 0xff,
+		       0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
+};
+
+static struct target_opcode_descriptor tcm_opcode_start_stop = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = START_STOP,
+	.cdb_size = 6,
+	.usage_bits = {START_STOP, 0x01, 0x00, 0x00,
+		       0x01, SCSI_CONTROL_MASK},
+};
+
+static struct target_opcode_descriptor tcm_opcode_mode_select = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = MODE_SELECT,
+	.cdb_size = 6,
+	.usage_bits = {MODE_SELECT, 0x10, 0x00, 0x00,
+		       0xff, SCSI_CONTROL_MASK},
+};
+
+static struct target_opcode_descriptor tcm_opcode_mode_select10 = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = MODE_SELECT_10,
+	.cdb_size = 10,
+	.usage_bits = {MODE_SELECT_10, 0x10, 0x00, 0x00,
+		       0x00, 0x00, 0x00, 0xff,
+		       0xff, SCSI_CONTROL_MASK},
+};
+
+static struct target_opcode_descriptor tcm_opcode_mode_sense = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = MODE_SENSE,
+	.cdb_size = 6,
+	.usage_bits = {MODE_SENSE, 0x08, 0xff, 0xff,
+		       0xff, SCSI_CONTROL_MASK},
+};
+
+static struct target_opcode_descriptor tcm_opcode_mode_sense10 = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = MODE_SENSE_10,
+	.cdb_size = 10,
+	.usage_bits = {MODE_SENSE_10, 0x18, 0xff, 0xff,
+		       0x00, 0x00, 0x00, 0xff,
+		       0xff, SCSI_CONTROL_MASK},
+};
+
+static struct target_opcode_descriptor tcm_opcode_pri_read_keys = {
+	.support = SCSI_SUPPORT_FULL,
+	.serv_action_valid = 1,
+	.opcode = PERSISTENT_RESERVE_IN,
+	.service_action = PRI_READ_KEYS,
+	.cdb_size = 10,
+	.usage_bits = {PERSISTENT_RESERVE_IN, PRI_READ_KEYS, 0x00, 0x00,
+		       0x00, 0x00, 0x00, 0xff,
+		       0xff, SCSI_CONTROL_MASK},
+};
+
+static struct target_opcode_descriptor tcm_opcode_pri_read_resrv = {
+	.support = SCSI_SUPPORT_FULL,
+	.serv_action_valid = 1,
+	.opcode = PERSISTENT_RESERVE_IN,
+	.service_action = PRI_READ_RESERVATION,
+	.cdb_size = 10,
+	.usage_bits = {PERSISTENT_RESERVE_IN, PRI_READ_RESERVATION, 0x00, 0x00,
+		       0x00, 0x00, 0x00, 0xff,
+		       0xff, SCSI_CONTROL_MASK},
+};
+
+static bool tcm_is_pr_enabled(struct target_opcode_descriptor *descr,
+			      struct se_cmd *cmd)
+{
+	struct se_device *dev = cmd->se_dev;
+
+	if (!dev->dev_attrib.emulate_pr)
+		return false;
+
+	if (!(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
+		return true;
+
+	switch (descr->opcode) {
+	case RESERVE:
+	case RESERVE_10:
+	case RELEASE:
+	case RELEASE_10:
+		/*
+		 * The pr_ops which are used by the backend modules don't
+		 * support these commands.
+		 */
+		return false;
+	case PERSISTENT_RESERVE_OUT:
+		switch (descr->service_action) {
+		case PRO_REGISTER_AND_MOVE:
+		case PRO_REPLACE_LOST_RESERVATION:
+			/*
+			 * The backend modules don't have access to ports and
+			 * I_T nexuses so they can't handle these type of
+			 * requests.
+			 */
+			return false;
+		}
+		break;
+	case PERSISTENT_RESERVE_IN:
+		if (descr->service_action == PRI_READ_FULL_STATUS)
+			return false;
+		break;
+	}
+
+	return true;
+}
+
+static struct target_opcode_descriptor tcm_opcode_pri_read_caps = {
+	.support = SCSI_SUPPORT_FULL,
+	.serv_action_valid = 1,
+	.opcode = PERSISTENT_RESERVE_IN,
+	.service_action = PRI_REPORT_CAPABILITIES,
+	.cdb_size = 10,
+	.usage_bits = {PERSISTENT_RESERVE_IN, PRI_REPORT_CAPABILITIES, 0x00, 0x00,
+		       0x00, 0x00, 0x00, 0xff,
+		       0xff, SCSI_CONTROL_MASK},
+	.enabled = tcm_is_pr_enabled,
+};
+
+static struct target_opcode_descriptor tcm_opcode_pri_read_full_status = {
+	.support = SCSI_SUPPORT_FULL,
+	.serv_action_valid = 1,
+	.opcode = PERSISTENT_RESERVE_IN,
+	.service_action = PRI_READ_FULL_STATUS,
+	.cdb_size = 10,
+	.usage_bits = {PERSISTENT_RESERVE_IN, PRI_READ_FULL_STATUS, 0x00, 0x00,
+		       0x00, 0x00, 0x00, 0xff,
+		       0xff, SCSI_CONTROL_MASK},
+	.enabled = tcm_is_pr_enabled,
+};
+
+static struct target_opcode_descriptor tcm_opcode_pro_register = {
+	.support = SCSI_SUPPORT_FULL,
+	.serv_action_valid = 1,
+	.opcode = PERSISTENT_RESERVE_OUT,
+	.service_action = PRO_REGISTER,
+	.cdb_size = 10,
+	.usage_bits = {PERSISTENT_RESERVE_OUT, PRO_REGISTER, 0xff, 0x00,
+		       0x00, 0xff, 0xff, 0xff,
+		       0xff, SCSI_CONTROL_MASK},
+	.enabled = tcm_is_pr_enabled,
+};
+
+static struct target_opcode_descriptor tcm_opcode_pro_reserve = {
+	.support = SCSI_SUPPORT_FULL,
+	.serv_action_valid = 1,
+	.opcode = PERSISTENT_RESERVE_OUT,
+	.service_action = PRO_RESERVE,
+	.cdb_size = 10,
+	.usage_bits = {PERSISTENT_RESERVE_OUT, PRO_RESERVE, 0xff, 0x00,
+		       0x00, 0xff, 0xff, 0xff,
+		       0xff, SCSI_CONTROL_MASK},
+	.enabled = tcm_is_pr_enabled,
+};
+
+static struct target_opcode_descriptor tcm_opcode_pro_release = {
+	.support = SCSI_SUPPORT_FULL,
+	.serv_action_valid = 1,
+	.opcode = PERSISTENT_RESERVE_OUT,
+	.service_action = PRO_RELEASE,
+	.cdb_size = 10,
+	.usage_bits = {PERSISTENT_RESERVE_OUT, PRO_RELEASE, 0xff, 0x00,
+		       0x00, 0xff, 0xff, 0xff,
+		       0xff, SCSI_CONTROL_MASK},
+	.enabled = tcm_is_pr_enabled,
+};
+
+static struct target_opcode_descriptor tcm_opcode_pro_clear = {
+	.support = SCSI_SUPPORT_FULL,
+	.serv_action_valid = 1,
+	.opcode = PERSISTENT_RESERVE_OUT,
+	.service_action = PRO_CLEAR,
+	.cdb_size = 10,
+	.usage_bits = {PERSISTENT_RESERVE_OUT, PRO_CLEAR, 0xff, 0x00,
+		       0x00, 0xff, 0xff, 0xff,
+		       0xff, SCSI_CONTROL_MASK},
+	.enabled = tcm_is_pr_enabled,
+};
+
+static struct target_opcode_descriptor tcm_opcode_pro_preempt = {
+	.support = SCSI_SUPPORT_FULL,
+	.serv_action_valid = 1,
+	.opcode = PERSISTENT_RESERVE_OUT,
+	.service_action = PRO_PREEMPT,
+	.cdb_size = 10,
+	.usage_bits = {PERSISTENT_RESERVE_OUT, PRO_PREEMPT, 0xff, 0x00,
+		       0x00, 0xff, 0xff, 0xff,
+		       0xff, SCSI_CONTROL_MASK},
+	.enabled = tcm_is_pr_enabled,
+};
+
+static struct target_opcode_descriptor tcm_opcode_pro_preempt_abort = {
+	.support = SCSI_SUPPORT_FULL,
+	.serv_action_valid = 1,
+	.opcode = PERSISTENT_RESERVE_OUT,
+	.service_action = PRO_PREEMPT_AND_ABORT,
+	.cdb_size = 10,
+	.usage_bits = {PERSISTENT_RESERVE_OUT, PRO_PREEMPT_AND_ABORT, 0xff, 0x00,
+		       0x00, 0xff, 0xff, 0xff,
+		       0xff, SCSI_CONTROL_MASK},
+	.enabled = tcm_is_pr_enabled,
+};
+
+static struct target_opcode_descriptor tcm_opcode_pro_reg_ign_exist = {
+	.support = SCSI_SUPPORT_FULL,
+	.serv_action_valid = 1,
+	.opcode = PERSISTENT_RESERVE_OUT,
+	.service_action = PRO_REGISTER_AND_IGNORE_EXISTING_KEY,
+	.cdb_size = 10,
+	.usage_bits = {
+		PERSISTENT_RESERVE_OUT, PRO_REGISTER_AND_IGNORE_EXISTING_KEY,
+		0xff, 0x00,
+		0x00, 0xff, 0xff, 0xff,
+		0xff, SCSI_CONTROL_MASK},
+	.enabled = tcm_is_pr_enabled,
+};
+
+static struct target_opcode_descriptor tcm_opcode_pro_register_move = {
+	.support = SCSI_SUPPORT_FULL,
+	.serv_action_valid = 1,
+	.opcode = PERSISTENT_RESERVE_OUT,
+	.service_action = PRO_REGISTER_AND_MOVE,
+	.cdb_size = 10,
+	.usage_bits = {PERSISTENT_RESERVE_OUT, PRO_REGISTER_AND_MOVE, 0xff, 0x00,
+		       0x00, 0xff, 0xff, 0xff,
+		       0xff, SCSI_CONTROL_MASK},
+	.enabled = tcm_is_pr_enabled,
+};
+
+static struct target_opcode_descriptor tcm_opcode_release = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = RELEASE,
+	.cdb_size = 6,
+	.usage_bits = {RELEASE, 0x00, 0x00, 0x00,
+		       0x00, SCSI_CONTROL_MASK},
+	.enabled = tcm_is_pr_enabled,
+};
+
+static struct target_opcode_descriptor tcm_opcode_release10 = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = RELEASE_10,
+	.cdb_size = 10,
+	.usage_bits = {RELEASE_10, 0x00, 0x00, 0x00,
+		       0x00, 0x00, 0x00, 0xff,
+		       0xff, SCSI_CONTROL_MASK},
+	.enabled = tcm_is_pr_enabled,
+};
+
+static struct target_opcode_descriptor tcm_opcode_reserve = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = RESERVE,
+	.cdb_size = 6,
+	.usage_bits = {RESERVE, 0x00, 0x00, 0x00,
+		       0x00, SCSI_CONTROL_MASK},
+	.enabled = tcm_is_pr_enabled,
+};
+
+static struct target_opcode_descriptor tcm_opcode_reserve10 = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = RESERVE_10,
+	.cdb_size = 10,
+	.usage_bits = {RESERVE_10, 0x00, 0x00, 0x00,
+		       0x00, 0x00, 0x00, 0xff,
+		       0xff, SCSI_CONTROL_MASK},
+	.enabled = tcm_is_pr_enabled,
+};
+
+static struct target_opcode_descriptor tcm_opcode_request_sense = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = REQUEST_SENSE,
+	.cdb_size = 6,
+	.usage_bits = {REQUEST_SENSE, 0x00, 0x00, 0x00,
+		       0xff, SCSI_CONTROL_MASK},
+};
+
+static struct target_opcode_descriptor tcm_opcode_inquiry = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = INQUIRY,
+	.cdb_size = 6,
+	.usage_bits = {INQUIRY, 0x01, 0xff, 0xff,
+		       0xff, SCSI_CONTROL_MASK},
+};
+
+static bool tcm_is_3pc_enabled(struct target_opcode_descriptor *descr,
+			       struct se_cmd *cmd)
+{
+	struct se_device *dev = cmd->se_dev;
+
+	return dev->dev_attrib.emulate_3pc;
+}
+
+static struct target_opcode_descriptor tcm_opcode_extended_copy_lid1 = {
+	.support = SCSI_SUPPORT_FULL,
+	.serv_action_valid = 1,
+	.opcode = EXTENDED_COPY,
+	.cdb_size = 16,
+	.usage_bits = {EXTENDED_COPY, 0x00, 0x00, 0x00,
+		       0x00, 0x00, 0x00, 0x00,
+		       0x00, 0x00, 0xff, 0xff,
+		       0xff, 0xff, 0x00, SCSI_CONTROL_MASK},
+	.enabled = tcm_is_3pc_enabled,
+};
+
+static struct target_opcode_descriptor tcm_opcode_rcv_copy_res_op_params = {
+	.support = SCSI_SUPPORT_FULL,
+	.serv_action_valid = 1,
+	.opcode = RECEIVE_COPY_RESULTS,
+	.service_action = RCR_SA_OPERATING_PARAMETERS,
+	.cdb_size = 16,
+	.usage_bits = {RECEIVE_COPY_RESULTS, RCR_SA_OPERATING_PARAMETERS,
+		       0x00, 0x00,
+		       0x00, 0x00, 0x00, 0x00,
+		       0x00, 0x00, 0xff, 0xff,
+		       0xff, 0xff, 0x00, SCSI_CONTROL_MASK},
+	.enabled = tcm_is_3pc_enabled,
+};
+
+static struct target_opcode_descriptor tcm_opcode_report_luns = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = REPORT_LUNS,
+	.cdb_size = 12,
+	.usage_bits = {REPORT_LUNS, 0x00, 0xff, 0x00,
+		       0x00, 0x00, 0xff, 0xff,
+		       0xff, 0xff, 0x00, SCSI_CONTROL_MASK},
+};
+
+static struct target_opcode_descriptor tcm_opcode_test_unit_ready = {
+	.support = SCSI_SUPPORT_FULL,
+	.opcode = TEST_UNIT_READY,
+	.cdb_size = 6,
+	.usage_bits = {TEST_UNIT_READY, 0x00, 0x00, 0x00,
+		       0x00, SCSI_CONTROL_MASK},
+};
+
+static struct target_opcode_descriptor tcm_opcode_report_target_pgs = {
+	.support = SCSI_SUPPORT_FULL,
+	.serv_action_valid = 1,
+	.opcode = MAINTENANCE_IN,
+	.service_action = MI_REPORT_TARGET_PGS,
+	.cdb_size = 12,
+	.usage_bits = {MAINTENANCE_IN, 0xE0 | MI_REPORT_TARGET_PGS, 0x00, 0x00,
+		       0x00, 0x00, 0xff, 0xff,
+		       0xff, 0xff, 0x00, SCSI_CONTROL_MASK},
+};
+
+static bool spc_rsoc_enabled(struct target_opcode_descriptor *descr,
+			     struct se_cmd *cmd)
+{
+	struct se_device *dev = cmd->se_dev;
+
+	return dev->dev_attrib.emulate_rsoc;
+}
+
+static struct target_opcode_descriptor tcm_opcode_report_supp_opcodes = {
+	.support = SCSI_SUPPORT_FULL,
+	.serv_action_valid = 1,
+	.opcode = MAINTENANCE_IN,
+	.service_action = MI_REPORT_SUPPORTED_OPERATION_CODES,
+	.cdb_size = 12,
+	.usage_bits = {MAINTENANCE_IN, MI_REPORT_SUPPORTED_OPERATION_CODES,
+		       0x87, 0xff,
+		       0xff, 0xff, 0xff, 0xff,
+		       0xff, 0xff, 0x00, SCSI_CONTROL_MASK},
+	.enabled = spc_rsoc_enabled,
+};
+
+static bool tcm_is_set_tpg_enabled(struct target_opcode_descriptor *descr,
+				   struct se_cmd *cmd)
+{
+	struct t10_alua_tg_pt_gp *l_tg_pt_gp;
+	struct se_lun *l_lun = cmd->se_lun;
+
+	rcu_read_lock();
+	l_tg_pt_gp = rcu_dereference(l_lun->lun_tg_pt_gp);
+	if (!l_tg_pt_gp) {
+		rcu_read_unlock();
+		return false;
+	}
+	if (!(l_tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA)) {
+		rcu_read_unlock();
+		return false;
+	}
+	rcu_read_unlock();
+
+	return true;
+}
+
+static struct target_opcode_descriptor tcm_opcode_set_tpg = {
+	.support = SCSI_SUPPORT_FULL,
+	.serv_action_valid = 1,
+	.opcode = MAINTENANCE_OUT,
+	.service_action = MO_SET_TARGET_PGS,
+	.cdb_size = 12,
+	.usage_bits = {MAINTENANCE_OUT, MO_SET_TARGET_PGS, 0x00, 0x00,
+		       0x00, 0x00, 0xff, 0xff,
+		       0xff, 0xff, 0x00, SCSI_CONTROL_MASK},
+	.enabled = tcm_is_set_tpg_enabled,
+};
+
+static struct target_opcode_descriptor *tcm_supported_opcodes[] = {
+	&tcm_opcode_read6,
+	&tcm_opcode_read10,
+	&tcm_opcode_read12,
+	&tcm_opcode_read16,
+	&tcm_opcode_write6,
+	&tcm_opcode_write10,
+	&tcm_opcode_write_verify10,
+	&tcm_opcode_write12,
+	&tcm_opcode_write16,
+	&tcm_opcode_write_verify16,
+	&tcm_opcode_write_same32,
+	&tcm_opcode_compare_write,
+	&tcm_opcode_read_capacity,
+	&tcm_opcode_read_capacity16,
+	&tcm_opcode_read_report_refferals,
+	&tcm_opcode_sync_cache,
+	&tcm_opcode_sync_cache16,
+	&tcm_opcode_unmap,
+	&tcm_opcode_write_same,
+	&tcm_opcode_write_same16,
+	&tcm_opcode_verify,
+	&tcm_opcode_verify16,
+	&tcm_opcode_start_stop,
+	&tcm_opcode_mode_select,
+	&tcm_opcode_mode_select10,
+	&tcm_opcode_mode_sense,
+	&tcm_opcode_mode_sense10,
+	&tcm_opcode_pri_read_keys,
+	&tcm_opcode_pri_read_resrv,
+	&tcm_opcode_pri_read_caps,
+	&tcm_opcode_pri_read_full_status,
+	&tcm_opcode_pro_register,
+	&tcm_opcode_pro_reserve,
+	&tcm_opcode_pro_release,
+	&tcm_opcode_pro_clear,
+	&tcm_opcode_pro_preempt,
+	&tcm_opcode_pro_preempt_abort,
+	&tcm_opcode_pro_reg_ign_exist,
+	&tcm_opcode_pro_register_move,
+	&tcm_opcode_release,
+	&tcm_opcode_release10,
+	&tcm_opcode_reserve,
+	&tcm_opcode_reserve10,
+	&tcm_opcode_request_sense,
+	&tcm_opcode_inquiry,
+	&tcm_opcode_extended_copy_lid1,
+	&tcm_opcode_rcv_copy_res_op_params,
+	&tcm_opcode_report_luns,
+	&tcm_opcode_test_unit_ready,
+	&tcm_opcode_report_target_pgs,
+	&tcm_opcode_report_supp_opcodes,
+	&tcm_opcode_set_tpg,
+};
+
+static int
+spc_rsoc_encode_command_timeouts_descriptor(unsigned char *buf, u8 ctdp,
+				struct target_opcode_descriptor *descr)
+{
+	if (!ctdp)
+		return 0;
+
+	put_unaligned_be16(0xa, buf);
+	buf[3] = descr->specific_timeout;
+	put_unaligned_be32(descr->nominal_timeout, &buf[4]);
+	put_unaligned_be32(descr->recommended_timeout, &buf[8]);
+
+	return 12;
+}
+
+static int
+spc_rsoc_encode_command_descriptor(unsigned char *buf, u8 ctdp,
+				   struct target_opcode_descriptor *descr)
+{
+	int td_size = 0;
+
+	buf[0] = descr->opcode;
+
+	put_unaligned_be16(descr->service_action, &buf[2]);
+
+	buf[5] = (ctdp << 1) | descr->serv_action_valid;
+	put_unaligned_be16(descr->cdb_size, &buf[6]);
+
+	td_size = spc_rsoc_encode_command_timeouts_descriptor(&buf[8], ctdp,
+							      descr);
+
+	return 8 + td_size;
+}
+
+static int
+spc_rsoc_encode_one_command_descriptor(unsigned char *buf, u8 ctdp,
+				       struct target_opcode_descriptor *descr,
+				       struct se_device *dev)
+{
+	int td_size = 0;
+
+	if (!descr) {
+		buf[1] = (ctdp << 7) | SCSI_SUPPORT_NOT_SUPPORTED;
+		return 2;
+	}
+
+	buf[1] = (ctdp << 7) | SCSI_SUPPORT_FULL;
+	put_unaligned_be16(descr->cdb_size, &buf[2]);
+	memcpy(&buf[4], descr->usage_bits, descr->cdb_size);
+	if (descr->update_usage_bits)
+		descr->update_usage_bits(&buf[4], dev);
+
+	td_size = spc_rsoc_encode_command_timeouts_descriptor(
+			&buf[4 + descr->cdb_size], ctdp, descr);
+
+	return 4 + descr->cdb_size + td_size;
+}
+
+static sense_reason_t
+spc_rsoc_get_descr(struct se_cmd *cmd, struct target_opcode_descriptor **opcode)
+{
+	struct target_opcode_descriptor *descr;
+	struct se_session *sess = cmd->se_sess;
+	unsigned char *cdb = cmd->t_task_cdb;
+	u8 opts = cdb[2] & 0x3;
+	u8 requested_opcode;
+	u16 requested_sa;
+	int i;
+
+	requested_opcode = cdb[3];
+	requested_sa = ((u16)cdb[4]) << 8 | cdb[5];
+	*opcode = NULL;
+
+	if (opts > 3) {
+		pr_debug("TARGET_CORE[%s]: Invalid REPORT SUPPORTED OPERATION CODES"
+			" with unsupported REPORTING OPTIONS %#x for 0x%08llx from %s\n",
+			cmd->se_tfo->fabric_name, opts,
+			cmd->se_lun->unpacked_lun,
+			sess->se_node_acl->initiatorname);
+		return TCM_INVALID_CDB_FIELD;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(tcm_supported_opcodes); i++) {
+		descr = tcm_supported_opcodes[i];
+		if (descr->opcode != requested_opcode)
+			continue;
+
+		switch (opts) {
+		case 0x1:
+			/*
+			 * If the REQUESTED OPERATION CODE field specifies an
+			 * operation code for which the device server implements
+			 * service actions, then the device server shall
+			 * terminate the command with CHECK CONDITION status,
+			 * with the sense key set to ILLEGAL REQUEST, and the
+			 * additional sense code set to INVALID FIELD IN CDB
+			 */
+			if (descr->serv_action_valid)
+				return TCM_INVALID_CDB_FIELD;
+
+			if (!descr->enabled || descr->enabled(descr, cmd))
+				*opcode = descr;
+			break;
+		case 0x2:
+			/*
+			 * If the REQUESTED OPERATION CODE field specifies an
+			 * operation code for which the device server does not
+			 * implement service actions, then the device server
+			 * shall terminate the command with CHECK CONDITION
+			 * status, with the sense key set to ILLEGAL REQUEST,
+			 * and the additional sense code set to INVALID FIELD IN CDB.
+			 */
+			if (descr->serv_action_valid &&
+			    descr->service_action == requested_sa) {
+				if (!descr->enabled || descr->enabled(descr,
+								      cmd))
+					*opcode = descr;
+			} else if (!descr->serv_action_valid)
+				return TCM_INVALID_CDB_FIELD;
+			break;
+		case 0x3:
+			/*
+			 * The command support data for the operation code and
+			 * service action a specified in the REQUESTED OPERATION
+			 * CODE field and REQUESTED SERVICE ACTION field shall
+			 * be returned in the one_command parameter data format.
+			 */
+			if (descr->service_action == requested_sa)
+				if (!descr->enabled || descr->enabled(descr,
+								      cmd))
+					*opcode = descr;
+			break;
+		}
+	}
+
+	return 0;
+}
+
+static sense_reason_t
+spc_emulate_report_supp_op_codes(struct se_cmd *cmd)
+{
+	int descr_num = ARRAY_SIZE(tcm_supported_opcodes);
+	struct target_opcode_descriptor *descr = NULL;
+	unsigned char *cdb = cmd->t_task_cdb;
+	u8 rctd = (cdb[2] >> 7) & 0x1;
+	unsigned char *buf = NULL;
+	int response_length = 0;
+	u8 opts = cdb[2] & 0x3;
+	unsigned char *rbuf;
+	sense_reason_t ret = 0;
+	int i;
+
+	if (!cmd->se_dev->dev_attrib.emulate_rsoc)
+		return TCM_UNSUPPORTED_SCSI_OPCODE;
+
+	rbuf = transport_kmap_data_sg(cmd);
+	if (cmd->data_length && !rbuf) {
+		ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+		goto out;
+	}
+
+	if (opts == 0)
+		response_length = 4 + (8 + rctd * 12) * descr_num;
+	else {
+		ret = spc_rsoc_get_descr(cmd, &descr);
+		if (ret)
+			goto out;
+
+		if (descr)
+			response_length = 4 + descr->cdb_size + rctd * 12;
+		else
+			response_length = 2;
+	}
+
+	buf = kzalloc(response_length, GFP_KERNEL);
+	if (!buf) {
+		ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+		goto out;
+	}
+	response_length = 0;
+
+	if (opts == 0) {
+		response_length += 4;
+
+		for (i = 0; i < ARRAY_SIZE(tcm_supported_opcodes); i++) {
+			descr = tcm_supported_opcodes[i];
+			if (descr->enabled && !descr->enabled(descr, cmd))
+				continue;
+
+			response_length += spc_rsoc_encode_command_descriptor(
+					&buf[response_length], rctd, descr);
+		}
+		put_unaligned_be32(response_length - 3, buf);
+	} else {
+		response_length = spc_rsoc_encode_one_command_descriptor(
+				&buf[response_length], rctd, descr,
+				cmd->se_dev);
+	}
+
+	memcpy(rbuf, buf, min_t(u32, response_length, cmd->data_length));
+out:
+	kfree(buf);
+	transport_kunmap_data_sg(cmd);
+
+	if (!ret)
+		target_complete_cmd_with_length(cmd, SAM_STAT_GOOD, response_length);
+	return ret;
+}
+
+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 RESERVE:
+	case RESERVE_10:
+	case RELEASE:
+	case RELEASE_10:
+		if (!dev->dev_attrib.emulate_pr)
+			return TCM_UNSUPPORTED_SCSI_OPCODE;
+
+		if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
+			return TCM_UNSUPPORTED_SCSI_OPCODE;
+		break;
+	case PERSISTENT_RESERVE_IN:
+	case PERSISTENT_RESERVE_OUT:
+		if (!dev->dev_attrib.emulate_pr)
+			return TCM_UNSUPPORTED_SCSI_OPCODE;
+		break;
+	}
+
+	switch (cdb[0]) {
+	case MODE_SELECT:
+		*size = cdb[4];
+		cmd->execute_cmd = spc_emulate_modeselect;
+		break;
+	case MODE_SELECT_10:
+		*size = get_unaligned_be16(&cdb[7]);
+		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 = get_unaligned_be16(&cdb[7]);
+		cmd->execute_cmd = spc_emulate_modesense;
+		break;
+	case LOG_SELECT:
+	case LOG_SENSE:
+		*size = get_unaligned_be16(&cdb[7]);
+		break;
+	case PERSISTENT_RESERVE_IN:
+		*size = get_unaligned_be16(&cdb[7]);
+		cmd->execute_cmd = target_scsi3_emulate_pr_in;
+		break;
+	case PERSISTENT_RESERVE_OUT:
+		*size = get_unaligned_be32(&cdb[5]);
+		cmd->execute_cmd = target_scsi3_emulate_pr_out;
+		break;
+	case RELEASE:
+	case RELEASE_10:
+		if (cdb[0] == RELEASE_10)
+			*size = get_unaligned_be16(&cdb[7]);
+		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 = get_unaligned_be16(&cdb[7]);
+		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 = get_unaligned_be16(&cdb[3]);
+
+		/*
+		 * 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 = get_unaligned_be32(&cdb[6]);
+		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 = get_unaligned_be32(&cdb[10]);
+		break;
+	case RECEIVE_DIAGNOSTIC:
+	case SEND_DIAGNOSTIC:
+		*size = get_unaligned_be16(&cdb[3]);
+		break;
+	case WRITE_BUFFER:
+		*size = get_unaligned_be24(&cdb[6]);
+		break;
+	case REPORT_LUNS:
+		cmd->execute_cmd = spc_emulate_report_luns;
+		*size = get_unaligned_be32(&cdb[6]);
+		/*
+		 * 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;
+			}
+			if ((cdb[1] & 0x1f) ==
+			    MI_REPORT_SUPPORTED_OPERATION_CODES)
+				cmd->execute_cmd =
+					spc_emulate_report_supp_op_codes;
+			*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);