On Mon, 2010-11-08 at 12:19 -0500, Christoph Hellwig wrote:
> Split out the CDB emulation into it's own file, and refactor it along proper
> boundaries.
>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
>
I think this makes alot sense for the vast majority of the CDB emulation
code, but I think specifically for the handful of PR and ALUA CDB
emulation pieces it does make more sense conceptually (and for the sake
of comments) to keep this code in their respective source files.
Other than those two cases, I am happy to merge this code.
Thanks alot for this one hch!
--nab
> Index: lio-core-2.6/drivers/target/target_core_cdb.c
> ===================================================================
> --- /dev/null 1970-01-01 00:00:00.000000000 +0000
> +++ lio-core-2.6/drivers/target/target_core_cdb.c 2010-11-08 18:14:35.028196347 +0100
> @@ -0,0 +1,1128 @@
> +/*
> + * CDB emulation for non-READ/WRITE commands.
> + *
> + * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc.
> + * Copyright (c) 2005, 2006, 2007 SBE, Inc.
> + * Copyright (c) 2007-2010 Rising Tide Systems
> + * Copyright (c) 2008-2010 Linux-iSCSI.org
> + *
> + * Nicholas A. Bellinger <nab@xxxxxxxxxx>
> + *
> + * 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 <asm/unaligned.h>
> +#include <scsi/scsi.h>
> +
> +#include <target/target_core_base.h>
> +#include <target/target_core_transport.h>
> +#include <target/target_core_fabric_ops.h>
> +#include "target_core_ua.h"
> +
> +static void
> +target_fill_alua_data(struct se_port *port, unsigned char *buf)
> +{
> + struct t10_alua_tg_pt_gp *tg_pt_gp;
> + struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
> +
> + /*
> + * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS.
> + */
> + buf[5] = 0x80;
> +
> + /*
> + * Set TPGS field for explict and/or implict ALUA access type
> + * and opteration.
> + *
> + * See spc4r17 section 6.4.2 Table 135
> + */
> + if (!port)
> + return;
> + tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
> + if (!tg_pt_gp_mem)
> + return;
> +
> + spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
> + tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
> + if (tg_pt_gp)
> + buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type;
> + spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
> +}
> +
> +static int
> +target_emulate_inquiry_std(struct se_cmd *cmd)
> +{
> + struct se_lun *lun = SE_LUN(cmd);
> + struct se_device *dev = SE_DEV(cmd);
> + unsigned char *buf = cmd->t_task->t_task_buf;
> +
> + /*
> + * Make sure we at least have 6 bytes of INQUIRY response
> + * payload going back for EVPD=0
> + */
> + if (cmd->data_length < 6) {
> + printk(KERN_ERR "SCSI Inquiry payload length: %u"
> + " too small for EVPD=0\n", cmd->data_length);
> + return -1;
> + }
> +
> + buf[0] = dev->transport->get_device_type(dev);
> + if (buf[0] == TYPE_TAPE)
> + buf[1] = 0x80;
> + buf[2] = dev->transport->get_device_rev(dev);
> +
> + /*
> + * Enable SCCS and TPGS fields for Emulated ALUA
> + */
> + if (T10_ALUA(dev->se_sub_dev)->alua_type == SPC3_ALUA_EMULATED)
> + target_fill_alua_data(lun->lun_sep, buf);
> +
> + if (cmd->data_length < 8) {
> + buf[4] = 1; /* Set additional length to 1 */
> + return 0;
> + }
> +
> + buf[7] = 0x32; /* Sync=1 and CmdQue=1 */
> +
> + /*
> + * Do not include vendor, product, reversion info in INQUIRY
> + * response payload for cdbs with a small allocation length.
> + */
> + if (cmd->data_length < 36) {
> + buf[4] = 3; /* Set additional length to 3 */
> + return 0;
> + }
> +
> + snprintf((unsigned char *)&buf[8], 8, "LIO-ORG");
> + snprintf((unsigned char *)&buf[16], 16, "%s",
> + &DEV_T10_WWN(dev)->model[0]);
> + snprintf((unsigned char *)&buf[32], 4, "%s",
> + &DEV_T10_WWN(dev)->revision[0]);
> + buf[4] = 31; /* Set additional length to 31 */
> + return 0;
> +}
> +
> +/* supported vital product data pages */
> +static int
> +target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf)
> +{
> + buf[1] = 0x00;
> + if (cmd->data_length < 8)
> + return 0;
> +
> + buf[4] = 0x0;
> + /*
> + * 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 (SE_DEV(cmd)->se_sub_dev->su_dev_flags &
> + SDF_EMULATED_VPD_UNIT_SERIAL) {
> + buf[3] = 3;
> + buf[5] = 0x80;
> + buf[6] = 0x83;
> + buf[7] = 0x86;
> + }
> +
> + return 0;
> +}
> +
> +/* unit serial number */
> +static int
> +target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf)
> +{
> + struct se_device *dev = SE_DEV(cmd);
> + u16 len;
> +
> + buf[1] = 0x80;
> + if (dev->se_sub_dev->su_dev_flags &
> + SDF_EMULATED_VPD_UNIT_SERIAL) {
> + u32 unit_serial_len;
> +
> + unit_serial_len =
> + strlen(&DEV_T10_WWN(dev)->unit_serial[0]);
> + unit_serial_len++; /* For NULL Terminator */
> +
> + if (((len + 4) + unit_serial_len) > cmd->data_length) {
> + len += unit_serial_len;
> + buf[2] = ((len >> 8) & 0xff);
> + buf[3] = (len & 0xff);
> + return 0;
> + }
> + len += sprintf((unsigned char *)&buf[4], "%s",
> + &DEV_T10_WWN(dev)->unit_serial[0]);
> + len++; /* Extra Byte for NULL Terminator */
> + buf[3] = len;
> + }
> + return 0;
> +}
> +
> +/*
> + * Device identification VPD, for a complete list of
> + * DESIGNATOR TYPEs see spc4r17 Table 459.
> + */
> +static int
> +target_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf)
> +{
> + struct se_device *dev = SE_DEV(cmd);
> + struct se_lun *lun = SE_LUN(cmd);
> + struct se_port *port = NULL;
> + struct se_portal_group *tpg = NULL;
> + struct t10_alua_lu_gp_member *lu_gp_mem;
> + struct t10_alua_tg_pt_gp *tg_pt_gp;
> + struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
> + unsigned char binary, binary_new;
> + unsigned char *prod = &DEV_T10_WWN(dev)->model[0];
> + u32 prod_len;
> + u32 unit_serial_len, off = 0;
> + int i;
> + u16 len = 0, id_len;
> +
> + buf[1] = 0x83;
> + off = 4;
> +
> + /*
> + * NAA IEEE Registered Extended Assigned designator format, see
> + * spc4r17 section 7.7.3.6.5
> + *
> + * We depend upon a target_core_mod/ConfigFS provided
> + * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial
> + * value in order to return the NAA id.
> + */
> + if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL))
> + goto check_t10_vend_desc;
> +
> + if (off + 20 > cmd->data_length)
> + goto check_t10_vend_desc;
> +
> + /* CODE SET == Binary */
> + buf[off++] = 0x1;
> +
> + /* Set ASSOICATION == 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
> + */
> + binary = transport_asciihex_to_binaryhex(
> + &DEV_T10_WWN(dev)->unit_serial[0]);
> + buf[off++] |= (binary & 0xf0) >> 4;
> + for (i = 0; i < 24; i += 2) {
> + binary_new = transport_asciihex_to_binaryhex(
> + &DEV_T10_WWN(dev)->unit_serial[i+2]);
> + buf[off] = (binary & 0x0f) << 4;
> + buf[off++] |= (binary_new & 0xf0) >> 4;
> + binary = binary_new;
> + }
> + len = 20;
> + off = (len + 4);
> +
> +check_t10_vend_desc:
> + /*
> + * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4
> + */
> + id_len = 8; /* For Vendor field */
> + prod_len = 4; /* For VPD Header */
> + prod_len += 8; /* For Vendor field */
> + prod_len += strlen(prod);
> + prod_len++; /* For : */
> +
> + if (dev->se_sub_dev->su_dev_flags &
> + SDF_EMULATED_VPD_UNIT_SERIAL) {
> + unit_serial_len =
> + strlen(&DEV_T10_WWN(dev)->unit_serial[0]);
> + unit_serial_len++; /* For NULL Terminator */
> +
> + if ((len + (id_len + 4) +
> + (prod_len + unit_serial_len)) >
> + cmd->data_length) {
> + len += (prod_len + unit_serial_len);
> + goto check_port;
> + }
> + id_len += sprintf((unsigned char *)&buf[off+12],
> + "%s:%s", prod,
> + &DEV_T10_WWN(dev)->unit_serial[0]);
> + }
> + buf[off] = 0x2; /* ASCII */
> + buf[off+1] = 0x1; /* T10 Vendor ID */
> + buf[off+2] = 0x0;
> + memcpy((unsigned char *)&buf[off+4], "LIO-ORG", 8);
> + /* Extra Byte for NULL Terminator */
> + id_len++;
> + /* Identifier Length */
> + buf[off+3] = id_len;
> + /* Header size for Designation descriptor */
> + len += (id_len + 4);
> + off += (id_len + 4);
> + /*
> + * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD
> + */
> +check_port:
> + port = lun->lun_sep;
> + if (port) {
> + struct t10_alua_lu_gp *lu_gp;
> + u32 padding, scsi_name_len;
> + u16 lu_gp_id = 0;
> + u16 tg_pt_gp_id = 0;
> + u16 tpgt;
> +
> + tpg = port->sep_tpg;
> + /*
> + * Relative target port identifer, see spc4r17
> + * section 7.7.3.7
> + *
> + * Get the PROTOCOL IDENTIFIER as defined by spc4r17
> + * section 7.5.1 Table 362
> + */
> + if (((len + 4) + 8) > cmd->data_length) {
> + len += 8;
> + goto check_tpgi;
> + }
> + buf[off] =
> + (TPG_TFO(tpg)->get_fabric_proto_ident(tpg) << 4);
> + buf[off++] |= 0x1; /* CODE SET == Binary */
> + buf[off] = 0x80; /* Set PIV=1 */
> + /* Set ASSOICATION == target port: 01b */
> + buf[off] |= 0x10;
> + /* DESIGNATOR TYPE == Relative target port identifer */
> + buf[off++] |= 0x4;
> + off++; /* Skip over Reserved */
> + buf[off++] = 4; /* DESIGNATOR LENGTH */
> + /* Skip over Obsolete field in RTPI payload
> + * in Table 472 */
> + off += 2;
> + buf[off++] = ((port->sep_rtpi >> 8) & 0xff);
> + buf[off++] = (port->sep_rtpi & 0xff);
> + len += 8; /* Header size + Designation descriptor */
> + /*
> + * Target port group identifier, see spc4r17
> + * section 7.7.3.8
> + *
> + * Get the PROTOCOL IDENTIFIER as defined by spc4r17
> + * section 7.5.1 Table 362
> + */
> +check_tpgi:
> + if (T10_ALUA(dev->se_sub_dev)->alua_type !=
> + SPC3_ALUA_EMULATED)
> + goto check_scsi_name;
> +
> + if (((len + 4) + 8) > cmd->data_length) {
> + len += 8;
> + goto check_lu_gp;
> + }
> + tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
> + if (!tg_pt_gp_mem)
> + goto check_lu_gp;
> +
> + spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
> + tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
> + if (!(tg_pt_gp)) {
> + spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
> + goto check_lu_gp;
> + }
> + tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id;
> + spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
> +
> + buf[off] =
> + (TPG_TFO(tpg)->get_fabric_proto_ident(tpg) << 4);
> + buf[off++] |= 0x1; /* CODE SET == Binary */
> + buf[off] = 0x80; /* Set PIV=1 */
> + /* Set ASSOICATION == 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:
> + if (((len + 4) + 8) > cmd->data_length) {
> + len += 8;
> + goto check_scsi_name;
> + }
> + lu_gp_mem = dev->dev_alua_lu_gp_mem;
> + if (!(lu_gp_mem))
> + goto check_scsi_name;
> +
> + spin_lock(&lu_gp_mem->lu_gp_mem_lock);
> + lu_gp = lu_gp_mem->lu_gp;
> + if (!(lu_gp)) {
> + spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
> + goto check_scsi_name;
> + }
> + lu_gp_id = lu_gp->lu_gp_id;
> + spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
> +
> + buf[off++] |= 0x1; /* CODE SET == Binary */
> + /* DESIGNATOR TYPE == Logical Unit Group identifier */
> + buf[off++] |= 0x6;
> + off++; /* Skip over Reserved */
> + buf[off++] = 4; /* DESIGNATOR LENGTH */
> + off += 2; /* Skip over Reserved Field */
> + buf[off++] = ((lu_gp_id >> 8) & 0xff);
> + buf[off++] = (lu_gp_id & 0xff);
> + len += 8; /* Header size + Designation descriptor */
> + /*
> + * SCSI name string designator, see spc4r17
> + * section 7.7.3.11
> + *
> + * Get the PROTOCOL IDENTIFIER as defined by spc4r17
> + * section 7.5.1 Table 362
> + */
> +check_scsi_name:
> + scsi_name_len = strlen(TPG_TFO(tpg)->tpg_get_wwn(tpg));
> + /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */
> + scsi_name_len += 10;
> + /* Check for 4-byte padding */
> + padding = ((-scsi_name_len) & 3);
> + if (padding != 0)
> + scsi_name_len += padding;
> + /* Header size + Designation descriptor */
> + scsi_name_len += 4;
> +
> + if (((len + 4) + scsi_name_len) > cmd->data_length) {
> + len += scsi_name_len;
> + goto set_len;
> + }
> + buf[off] =
> + (TPG_TFO(tpg)->get_fabric_proto_ident(tpg) << 4);
> + buf[off++] |= 0x3; /* CODE SET == UTF-8 */
> + buf[off] = 0x80; /* Set PIV=1 */
> + /* Set ASSOICATION == target port: 01b */
> + buf[off] |= 0x10;
> + /* DESIGNATOR TYPE == SCSI name string */
> + buf[off++] |= 0x8;
> + off += 2; /* Skip over Reserved and length */
> + /*
> + * SCSI name string identifer containing, $FABRIC_MOD
> + * dependent information. For LIO-Target and iSCSI
> + * Target Port, this means "<iSCSI name>,t,0x<TPGT> in
> + * UTF-8 encoding.
> + */
> + tpgt = TPG_TFO(tpg)->tpg_get_tag(tpg);
> + scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x",
> + TPG_TFO(tpg)->tpg_get_wwn(tpg), tpgt);
> + scsi_name_len += 1 /* Include NULL terminator */;
> + /*
> + * The null-terminated, null-padded (see 4.4.2) SCSI
> + * NAME STRING field contains a UTF-8 format string.
> + * The number of bytes in the SCSI NAME STRING field
> + * (i.e., the value in the DESIGNATOR LENGTH field)
> + * shall be no larger than 256 and shall be a multiple
> + * of four.
> + */
> + if (padding)
> + scsi_name_len += padding;
> +
> + buf[off-1] = scsi_name_len;
> + off += scsi_name_len;
> + /* Header size + Designation descriptor */
> + len += (scsi_name_len + 4);
> + }
> +set_len:
> + buf[2] = ((len >> 8) & 0xff);
> + buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */
> + return 0;
> +}
> +
> +/* Extended INQUIRY Data VPD Page */
> +static int
> +target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf)
> +{
> + if (cmd->data_length < 60)
> + return 0;
> +
> + buf[1] = 0x86;
> + buf[2] = 0x3c;
> + /* Set HEADSUP, ORDSUP, SIMPSUP */
> + buf[5] = 0x07;
> +
> + /* If WriteCache emulation is enabled, set V_SUP */
> + if (DEV_ATTRIB(SE_DEV(cmd))->emulate_write_cache > 0)
> + buf[6] = 0x01;
> + return 0;
> +}
> +
> +/* Block Limits VPD page */
> +static int
> +target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
> +{
> + struct se_device *dev = SE_DEV(cmd);
> + int have_tp = 0;
> +
> + /*
> + * Following sbc3r22 section 6.5.3 Block Limits VPD page, when
> + * emulate_tpu=1 or emulate_tpws=1 we will be expect a
> + * different page length for Thin Provisioning.
> + */
> + if (DEV_ATTRIB(dev)->emulate_tpu || DEV_ATTRIB(dev)->emulate_tpws)
> + have_tp = 1;
> +
> + if (have_tp) {
> + if (cmd->data_length < (0x3c + 4)) {
> + printk(KERN_INFO "Received data_length: %u"
> + " too small for TPE=1 EVPD 0xb0\n",
> + cmd->data_length);
> + return -1;
> + }
> + } else {
> + if (cmd->data_length < (0x10 + 4)) {
> + printk(KERN_INFO "Received data_length: %u"
> + " too small for TPE=1 EVPD 0xb0\n",
> + cmd->data_length);
> + return -1;
> + }
> + }
> +
> + buf[0] = dev->transport->get_device_type(dev);
> + buf[1] = 0xb0;
> + buf[3] = have_tp ? 0x3c : 0x10;
> +
> + /*
> + * Set OPTIMAL TRANSFER LENGTH GRANULARITY
> + */
> + put_unaligned_be16(1, &buf[6]);
> +
> + /*
> + * Set MAXIMUM TRANSFER LENGTH
> + */
> + put_unaligned_be32(DEV_ATTRIB(dev)->max_sectors, &buf[8]);
> +
> + /*
> + * Set OPTIMAL TRANSFER LENGTH
> + */
> + put_unaligned_be32(DEV_ATTRIB(dev)->optimal_sectors, &buf[12]);
> +
> + if (!have_tp)
> + return 0;
> +
> + /*
> + * Set MAXIMUM UNMAP LBA COUNT
> + */
> + put_unaligned_be32(DEV_ATTRIB(dev)->max_unmap_lba_count, &buf[20]);
> +
> + /*
> + * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT
> + */
> + put_unaligned_be32(DEV_ATTRIB(dev)->max_unmap_block_desc_count,
> + &buf[24]);
> +
> + /*
> + * Set OPTIMAL UNMAP GRANULARITY
> + */
> + put_unaligned_be32(DEV_ATTRIB(dev)->unmap_granularity, &buf[28]);
> +
> + /*
> + * UNMAP GRANULARITY ALIGNMENT
> + */
> + put_unaligned_be32(DEV_ATTRIB(dev)->unmap_granularity_alignment,
> + &buf[32]);
> + if (DEV_ATTRIB(dev)->unmap_granularity_alignment != 0)
> + buf[32] |= 0x80; /* Set the UGAVALID bit */
> +
> + return 0;
> +}
> +
> +/* Thin Provisioning VPD */
> +static int
> +target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf)
> +{
> + struct se_device *dev = SE_DEV(cmd);
> +
> + /*
> + * From sbc3r22 section 6.5.4 Thin Provisioning VPD page:
> + *
> + * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to
> + * zero, then the page length shall be set to 0004h. If the DP bit
> + * is set to one, then the page length shall be set to the value
> + * defined in table 162.
> + */
> + buf[0] = dev->transport->get_device_type(dev);
> + buf[1] = 0xb2;
> +
> + /*
> + * Set Hardcoded length mentioned above for DP=0
> + */
> + put_unaligned_be16(0x0004, &buf[2]);
> +
> + /*
> + * The THRESHOLD EXPONENT field indicates the threshold set size in
> + * LBAs as a power of 2 (i.e., the threshold set size is equal to
> + * 2(threshold exponent)).
> + *
> + * Note that this is currently set to 0x00 as mkp says it will be
> + * changing again. We can enable this once it has settled in T10
> + * and is actually used by Linux/SCSI ML code.
> + */
> + buf[4] = 0x00;
> +
> + /*
> + * A TPU bit set to one indicates that the device server supports
> + * the UNMAP command (see 5.25). A TPU bit set to zero indicates
> + * that the device server does not support the UNMAP command.
> + */
> + if (DEV_ATTRIB(dev)->emulate_tpu != 0)
> + buf[5] = 0x80;
> +
> + /*
> + * A TPWS bit set to one indicates that the device server supports
> + * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs.
> + * A TPWS bit set to zero indicates that the device server does not
> + * support the use of the WRITE SAME (16) command to unmap LBAs.
> + */
> + if (DEV_ATTRIB(dev)->emulate_tpws != 0)
> + buf[5] |= 0x40;
> +
> + return 0;
> +}
> +
> +static int
> +target_emulate_inquiry(struct se_cmd *cmd)
> +{
> + struct se_device *dev = SE_DEV(cmd);
> + unsigned char *buf = cmd->t_task->t_task_buf;
> + unsigned char *cdb = cmd->t_task->t_task_cdb;
> +
> + if (!(cdb[1] & 0x1))
> + return target_emulate_inquiry_std(cmd);
> +
> + /*
> + * Make sure we at least have 4 bytes of INQUIRY response
> + * payload for 0x00 going back for EVPD=1. Note that 0x80
> + * and 0x83 will check for enough payload data length and
> + * jump to set_len: label when there is not enough inquiry EVPD
> + * payload length left for the next outgoing EVPD metadata
> + */
> + if (cmd->data_length < 4) {
> + printk(KERN_ERR "SCSI Inquiry payload length: %u"
> + " too small for EVPD=1\n", cmd->data_length);
> + return -1;
> + }
> + buf[0] = dev->transport->get_device_type(dev);
> +
> + switch (cdb[2]) {
> + case 0x00:
> + return target_emulate_evpd_00(cmd, buf);
> + case 0x80:
> + return target_emulate_evpd_80(cmd, buf);
> + case 0x83:
> + return target_emulate_evpd_83(cmd, buf);
> + case 0x86:
> + return target_emulate_evpd_86(cmd, buf);
> + case 0xb0:
> + return target_emulate_evpd_b0(cmd, buf);
> + case 0xb2:
> + return target_emulate_evpd_b2(cmd, buf);
> + default:
> + printk(KERN_ERR "Unknown VPD Code: 0x%02x\n", cdb[2]);
> + return -1;
> + }
> +
> + return 0;
> +}
> +
> +static int
> +target_emulate_readcapacity(struct se_cmd *cmd)
> +{
> + struct se_device *dev = SE_DEV(cmd);
> + unsigned char *buf = cmd->t_task->t_task_buf;
> + u32 blocks = dev->transport->get_blocks(dev);
> +
> + buf[0] = (blocks >> 24) & 0xff;
> + buf[1] = (blocks >> 16) & 0xff;
> + buf[2] = (blocks >> 8) & 0xff;
> + buf[3] = blocks & 0xff;
> + buf[4] = (DEV_ATTRIB(dev)->block_size >> 24) & 0xff;
> + buf[5] = (DEV_ATTRIB(dev)->block_size >> 16) & 0xff;
> + buf[6] = (DEV_ATTRIB(dev)->block_size >> 8) & 0xff;
> + buf[7] = DEV_ATTRIB(dev)->block_size & 0xff;
> + /*
> + * Set max 32-bit blocks to signal SERVICE ACTION READ_CAPACITY_16
> + */
> + if (DEV_ATTRIB(dev)->emulate_tpu || DEV_ATTRIB(dev)->emulate_tpws)
> + put_unaligned_be32(0xFFFFFFFF, &buf[0]);
> +
> + return 0;
> +}
> +
> +static int
> +target_emulate_readcapacity_16(struct se_cmd *cmd)
> +{
> + struct se_device *dev = SE_DEV(cmd);
> + unsigned char *buf = cmd->t_task->t_task_buf;
> + unsigned long long blocks = dev->transport->get_blocks(dev);
> +
> + buf[0] = (blocks >> 56) & 0xff;
> + buf[1] = (blocks >> 48) & 0xff;
> + buf[2] = (blocks >> 40) & 0xff;
> + buf[3] = (blocks >> 32) & 0xff;
> + buf[4] = (blocks >> 24) & 0xff;
> + buf[5] = (blocks >> 16) & 0xff;
> + buf[6] = (blocks >> 8) & 0xff;
> + buf[7] = blocks & 0xff;
> + buf[8] = (DEV_ATTRIB(dev)->block_size >> 24) & 0xff;
> + buf[9] = (DEV_ATTRIB(dev)->block_size >> 16) & 0xff;
> + buf[10] = (DEV_ATTRIB(dev)->block_size >> 8) & 0xff;
> + buf[11] = DEV_ATTRIB(dev)->block_size & 0xff;
> + /*
> + * Set Thin Provisioning Enable bit following sbc3r22 in section
> + * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled.
> + */
> + if (DEV_ATTRIB(dev)->emulate_tpu || DEV_ATTRIB(dev)->emulate_tpws)
> + buf[14] = 0x80;
> +
> + return 0;
> +}
> +
> +static int
> +target_modesense_rwrecovery(unsigned char *p)
> +{
> + p[0] = 0x01;
> + p[1] = 0x0a;
> +
> + return 12;
> +}
> +
> +static int
> +target_modesense_control(struct se_device *dev, unsigned char *p)
> +{
> + p[0] = 0x0a;
> + p[1] = 0x0a;
> + p[2] = 2;
> + /*
> + * From spc4r17, section 7.4.6 Control mode Page
> + *
> + * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b
> + *
> + * 00b: The logical unit shall clear any unit attention condition
> + * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
> + * status and shall not establish a unit attention condition when a com-
> + * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT
> + * status.
> + *
> + * 10b: The logical unit shall not clear any unit attention condition
> + * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
> + * status and shall not establish a unit attention condition when
> + * a command is completed with BUSY, TASK SET FULL, or RESERVATION
> + * CONFLICT status.
> + *
> + * 11b a The logical unit shall not clear any unit attention condition
> + * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
> + * status and shall establish a unit attention condition for the
> + * initiator port associated with the I_T nexus on which the BUSY,
> + * TASK SET FULL, or RESERVATION CONFLICT status is being returned.
> + * Depending on the status, the additional sense code shall be set to
> + * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS
> + * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE
> + * command, a unit attention condition shall be established only once
> + * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless
> + * to the number of commands completed with one of those status codes.
> + */
> + p[4] = (DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl == 2) ? 0x30 :
> + (DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00;
> + /*
> + * From spc4r17, section 7.4.6 Control mode Page
> + *
> + * Task Aborted Status (TAS) bit set to zero.
> + *
> + * A task aborted status (TAS) bit set to zero specifies that aborted
> + * tasks shall be terminated by the device server without any response
> + * to the application client. A TAS bit set to one specifies that tasks
> + * aborted by the actions of an I_T nexus other than the I_T nexus on
> + * which the command was received shall be completed with TASK ABORTED
> + * status (see SAM-4).
> + */
> + p[5] = (DEV_ATTRIB(dev)->emulate_tas) ? 0x40 : 0x00;
> + p[8] = 0xff;
> + p[9] = 0xff;
> + p[11] = 30;
> +
> + return 12;
> +}
> +
> +static int
> +target_modesense_caching(struct se_device *dev, unsigned char *p)
> +{
> + p[0] = 0x08;
> + p[1] = 0x12;
> + if (DEV_ATTRIB(dev)->emulate_write_cache > 0)
> + p[2] = 0x04; /* Write Cache Enable */
> + p[12] = 0x20; /* Disabled Read Ahead */
> +
> + return 20;
> +}
> +
> +static void
> +target_modesense_write_protect(unsigned char *buf, int type)
> +{
> + /*
> + * I believe that the WP bit (bit 7) in the mode header is the same for
> + * all device types..
> + */
> + switch (type) {
> + case TYPE_DISK:
> + case TYPE_TAPE:
> + default:
> + buf[0] |= 0x80; /* WP bit */
> + break;
> + }
> +}
> +
> +static void
> +target_modesense_dpofua(unsigned char *buf, int type)
> +{
> + switch (type) {
> + case TYPE_DISK:
> + buf[0] |= 0x10; /* DPOFUA bit */
> + break;
> + default:
> + break;
> + }
> +}
> +
> +static int
> +target_emulate_modesense(struct se_cmd *cmd, int ten)
> +{
> + struct se_device *dev = SE_DEV(cmd);
> + char *cdb = cmd->t_task->t_task_cdb;
> + unsigned char *rbuf = cmd->t_task->t_task_buf;
> + int type = dev->transport->get_device_type(dev);
> + int offset = (ten) ? 8 : 4;
> + int length = 0;
> + unsigned char buf[SE_MODE_PAGE_BUF];
> +
> + memset(buf, 0, SE_MODE_PAGE_BUF);
> +
> + switch (cdb[2] & 0x3f) {
> + case 0x01:
> + length = target_modesense_rwrecovery(&buf[offset]);
> + break;
> + case 0x08:
> + length = target_modesense_caching(dev, &buf[offset]);
> + break;
> + case 0x0a:
> + length = target_modesense_control(dev, &buf[offset]);
> + break;
> + case 0x3f:
> + length = target_modesense_rwrecovery(&buf[offset]);
> + length += target_modesense_caching(dev, &buf[offset+length]);
> + length += target_modesense_control(dev, &buf[offset+length]);
> + break;
> + default:
> + printk(KERN_ERR "Got Unknown Mode Page: 0x%02x\n",
> + cdb[2] & 0x3f);
> + return PYX_TRANSPORT_UNKNOWN_MODE_PAGE;
> + }
> + offset += length;
> +
> + if (ten) {
> + offset -= 2;
> + buf[0] = (offset >> 8) & 0xff;
> + buf[1] = offset & 0xff;
> +
> + if ((SE_LUN(cmd)->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) ||
> + (cmd->se_deve &&
> + (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
> + target_modesense_write_protect(&buf[3], type);
> +
> + if ((DEV_ATTRIB(dev)->emulate_write_cache > 0) &&
> + (DEV_ATTRIB(dev)->emulate_fua_write > 0))
> + target_modesense_dpofua(&buf[3], type);
> +
> + if ((offset + 2) > cmd->data_length)
> + offset = cmd->data_length;
> +
> + } else {
> + offset -= 1;
> + buf[0] = offset & 0xff;
> +
> + if ((SE_LUN(cmd)->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) ||
> + (cmd->se_deve &&
> + (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
> + target_modesense_write_protect(&buf[2], type);
> +
> + if ((DEV_ATTRIB(dev)->emulate_write_cache > 0) &&
> + (DEV_ATTRIB(dev)->emulate_fua_write > 0))
> + target_modesense_dpofua(&buf[2], type);
> +
> + if ((offset + 1) > cmd->data_length)
> + offset = cmd->data_length;
> + }
> + memcpy(rbuf, buf, offset);
> +
> + return 0;
> +}
> +
> +static int
> +target_emulate_request_sense(struct se_cmd *cmd)
> +{
> + unsigned char *cdb = cmd->t_task->t_task_cdb;
> + unsigned char *buf = cmd->t_task->t_task_buf;
> + u8 ua_asc = 0, ua_ascq = 0;
> +
> + if (cdb[1] & 0x01) {
> + printk(KERN_ERR "REQUEST_SENSE description emulation not"
> + " supported\n");
> + return PYX_TRANSPORT_INVALID_CDB_FIELD;
> + }
> + if (!(core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq))) {
> + /*
> + * CURRENT ERROR, UNIT ATTENTION
> + */
> + buf[0] = 0x70;
> + buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION;
> + /*
> + * Make sure request data length is enough for additional
> + * sense data.
> + */
> + if (cmd->data_length <= 18) {
> + buf[7] = 0x00;
> + return 0;
> + }
> + /*
> + * The Additional Sense Code (ASC) from the UNIT ATTENTION
> + */
> + buf[SPC_ASC_KEY_OFFSET] = ua_asc;
> + buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq;
> + buf[7] = 0x0A;
> + } else {
> + /*
> + * CURRENT ERROR, NO SENSE
> + */
> + buf[0] = 0x70;
> + buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE;
> + /*
> + * Make sure request data length is enough for additional
> + * sense data.
> + */
> + if (cmd->data_length <= 18) {
> + buf[7] = 0x00;
> + return 0;
> + }
> + /*
> + * NO ADDITIONAL SENSE INFORMATION
> + */
> + buf[SPC_ASC_KEY_OFFSET] = 0x00;
> + buf[7] = 0x0A;
> + }
> +
> + return 0;
> +}
> +
> +/*
> + * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
> + * Note this is not used for TCM/pSCSI passthrough
> + */
> +static int
> +target_emulate_unmap(struct se_task *task)
> +{
> + struct se_cmd *cmd = TASK_CMD(task);
> + struct se_device *dev = SE_DEV(cmd);
> + unsigned char *buf = cmd->t_task->t_task_buf, *ptr = NULL;
> + unsigned char *cdb = &cmd->t_task->t_task_cdb[0];
> + sector_t lba;
> + unsigned int size = cmd->data_length, range;
> + int ret, offset;
> + unsigned short dl, bd_dl;
> +
> + /* First UNMAP block descriptor starts at 8 byte offset */
> + offset = 8;
> + size -= 8;
> + dl = get_unaligned_be16(&cdb[0]);
> + bd_dl = get_unaligned_be16(&cdb[2]);
> + ptr = &buf[offset];
> + printk(KERN_INFO "UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu"
> + " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr);
> +
> + while (size) {
> + lba = get_unaligned_be64(&ptr[0]);
> + range = get_unaligned_be32(&ptr[8]);
> + printk(KERN_INFO "UNMAP: Using lba: %llu and range: %u\n",
> + (unsigned long long)lba, range);
> +
> + ret = dev->transport->do_discard(dev, lba, range);
> + if (ret < 0) {
> + printk(KERN_ERR "blkdev_issue_discard() failed: %d\n",
> + ret);
> + return -1;
> + }
> +
> + ptr += 16;
> + size -= 16;
> + }
> +
> + task->task_scsi_status = GOOD;
> + transport_complete_task(task, 1);
> + return 0;
> +}
> +
> +/*
> + * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
> + * Note this is not used for TCM/pSCSI passthrough
> + */
> +static int
> +target_emulate_write_same(struct se_task *task)
> +{
> + struct se_cmd *cmd = TASK_CMD(task);
> + struct se_device *dev = SE_DEV(cmd);
> + sector_t lba = cmd->t_task->t_task_lba;
> + unsigned int range;
> + int ret;
> +
> + range = (cmd->data_length / DEV_ATTRIB(dev)->block_size);
> +
> + printk(KERN_INFO "WRITE_SAME UNMAP: LBA: %llu Range: %u\n",
> + (unsigned long long)lba, range);
> +
> + ret = dev->transport->do_discard(dev, lba, range);
> + if (ret < 0) {
> + printk(KERN_INFO "blkdev_issue_discard() failed for WRITE_SAME\n");
> + return -1;
> + }
> +
> + task->task_scsi_status = GOOD;
> + transport_complete_task(task, 1);
> + return 0;
> +}
> +
> +int
> +transport_emulate_control_cdb(struct se_task *task)
> +{
> + struct se_cmd *cmd = TASK_CMD(task);
> + struct se_device *dev = SE_DEV(cmd);
> + unsigned short service_action;
> + int ret = 0;
> +
> + switch (cmd->t_task->t_task_cdb[0]) {
> + case INQUIRY:
> + ret = target_emulate_inquiry(cmd);
> + break;
> + case READ_CAPACITY:
> + ret = target_emulate_readcapacity(cmd);
> + break;
> + case MODE_SENSE:
> + ret = target_emulate_modesense(cmd, 0);
> + break;
> + case MODE_SENSE_10:
> + ret = target_emulate_modesense(cmd, 1);
> + break;
> + case SERVICE_ACTION_IN:
> + switch (cmd->t_task->t_task_cdb[1] & 0x1f) {
> + case SAI_READ_CAPACITY_16:
> + ret = target_emulate_readcapacity_16(cmd);
> + break;
> + default:
> + printk(KERN_ERR "Unsupported SA: 0x%02x\n",
> + cmd->t_task->t_task_cdb[1] & 0x1f);
> + return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
> + }
> + case REQUEST_SENSE:
> + ret = target_emulate_request_sense(cmd);
> + break;
> + case UNMAP:
> + if (!dev->transport->do_discard) {
> + printk(KERN_ERR "UNMAP emulation not supported for: %s\n",
> + dev->transport->name);
> + return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
> + }
> + ret = target_emulate_unmap(task);
> + break;
> + case WRITE_SAME_16:
> + if (!dev->transport->do_discard) {
> + printk(KERN_ERR "WRITE_SAME_16 emulation not supported"
> + " for: %s\n", dev->transport->name);
> + return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
> + }
> + ret = target_emulate_write_same(task);
> + break;
> + case VARIABLE_LENGTH_CMD:
> + service_action =
> + get_unaligned_be16(&cmd->t_task->t_task_cdb[8]);
> + switch (service_action) {
> + case WRITE_SAME_32:
> + if (!dev->transport->do_discard) {
> + printk(KERN_ERR "WRITE_SAME_32 SA emulation not"
> + " supported for: %s\n",
> + dev->transport->name);
> + return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
> + }
> + ret = target_emulate_write_same(task);
> + break;
> + default:
> + printk(KERN_ERR "Unsupported VARIABLE_LENGTH_CMD SA:"
> + " 0x%02x\n", service_action);
> + break;
> + }
> + break;
> + case SYNCHRONIZE_CACHE:
> + case 0x91: /* SYNCHRONIZE_CACHE_16: */
> + if (!dev->transport->do_sync_cache) {
> + printk(KERN_ERR
> + "SYNCHRONIZE_CACHE emulation not supported"
> + " for: %s\n", dev->transport->name);
> + return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
> + }
> + dev->transport->do_sync_cache(task);
> + break;
> + case ALLOW_MEDIUM_REMOVAL:
> + case ERASE:
> + case REZERO_UNIT:
> + case SEEK_10:
> + case SPACE:
> + case START_STOP:
> + case TEST_UNIT_READY:
> + case VERIFY:
> + case WRITE_FILEMARKS:
> + break;
> + default:
> + printk(KERN_ERR "Unsupported SCSI Opcode: 0x%02x for %s\n",
> + cmd->t_task->t_task_cdb[0], dev->transport->name);
> + return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
> + }
> +
> + if (ret < 0)
> + return ret;
> + task->task_scsi_status = GOOD;
> + transport_complete_task(task, 1);
> +
> + return PYX_TRANSPORT_SENT_TO_TRANSPORT;
> +}
> Index: lio-core-2.6/drivers/target/target_core_transport.c
> ===================================================================
> --- lio-core-2.6.orig/drivers/target/target_core_transport.c 2010-11-08 17:06:49.144863013 +0100
> +++ lio-core-2.6/drivers/target/target_core_transport.c 2010-11-08 18:13:15.068196347 +0100
> @@ -4405,871 +4405,6 @@ unsigned char transport_asciihex_to_bina
> }
> EXPORT_SYMBOL(transport_asciihex_to_binaryhex);
>
> -extern int transport_generic_emulate_inquiry(
> - struct se_cmd *cmd,
> - unsigned char type,
> - unsigned char *prod,
> - unsigned char *version)
> -{
> - struct se_device *dev = SE_DEV(cmd);
> - struct se_lun *lun = SE_LUN(cmd);
> - struct se_port *port = NULL;
> - struct se_portal_group *tpg = NULL;
> - struct t10_alua_lu_gp_member *lu_gp_mem;
> - struct t10_alua_tg_pt_gp *tg_pt_gp;
> - struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
> - unsigned char *buf = (unsigned char *) T_TASK(cmd)->t_task_buf;
> - unsigned char *cdb = T_TASK(cmd)->t_task_cdb;
> - unsigned char binary, binary_new;
> - u32 prod_len;
> - u32 unit_serial_len, off = 0;
> - int i;
> - u16 len = 0, id_len;
> -
> - if (!(cdb[1] & 0x1)) {
> - /*
> - * Make sure we at least have 6 bytes of INQUIRY response
> - * payload going back for EVPD=0
> - */
> - if (cmd->data_length < 6) {
> - printk(KERN_ERR "SCSI Inquiry payload length: %u"
> - " too small for EVPD=0\n", cmd->data_length);
> - return -1;
> - }
> - buf[0] = type;
> -
> - if (type == TYPE_TAPE)
> - buf[1] = 0x80;
> - buf[2] = TRANSPORT(dev)->get_device_rev(dev);
> - /*
> - * Enable SCCS and TPGS fields for Emulated ALUA
> - */
> - if (T10_ALUA(dev->se_sub_dev)->alua_type ==
> - SPC3_ALUA_EMULATED) {
> - /*
> - * Set SCCS for MAINTENANCE_IN +
> - * REPORT_TARGET_PORT_GROUPS
> - */
> - buf[5] = 0x80;
> - /*
> - * Set TPGS field for explict and/or implict ALUA
> - * access type and opteration.
> - *
> - * See spc4r17 section 6.4.2 Table 135
> - */
> - port = lun->lun_sep;
> - if (!(port))
> - goto after_tpgs;
> - tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
> - if (!(tg_pt_gp_mem))
> - goto after_tpgs;
> -
> - spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
> - tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
> - if (!(tg_pt_gp)) {
> - spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
> - goto after_tpgs;
> - }
> - buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type;
> - spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
> - }
> -after_tpgs:
> - if (cmd->data_length < 8) {
> - buf[4] = 1; /* Set additional length to 1 */
> - return 0;
> - }
> -
> - buf[7] = 0x32; /* Sync=1 and CmdQue=1 */
> - /*
> - * Do not include vendor, product, reversion info in INQUIRY
> - * response payload for cdbs with a small allocation length.
> - */
> - if (cmd->data_length < 36) {
> - buf[4] = 3; /* Set additional length to 3 */
> - return 0;
> - }
> -
> - snprintf((unsigned char *)&buf[8], 8, "LIO-ORG");
> - snprintf((unsigned char *)&buf[16], 16, "%s", prod);
> - snprintf((unsigned char *)&buf[32], 4, "%s", version);
> - buf[4] = 31; /* Set additional length to 31 */
> - return 0;
> - }
> - /*
> - * Make sure we at least have 4 bytes of INQUIRY response
> - * payload for 0x00 going back for EVPD=1. Note that 0x80
> - * and 0x83 will check for enough payload data length and
> - * jump to set_len: label when there is not enough inquiry EVPD
> - * payload length left for the next outgoing EVPD metadata
> - */
> - if (cmd->data_length < 4) {
> - printk(KERN_ERR "SCSI Inquiry payload length: %u"
> - " too small for EVPD=1\n", cmd->data_length);
> - return -1;
> - }
> - buf[0] = type;
> -
> - switch (cdb[2]) {
> - case 0x00: /* supported vital product data pages */
> - buf[1] = 0x00;
> - if (cmd->data_length < 8)
> - return 0;
> - buf[4] = 0x0;
> - /*
> - * 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 (dev->se_sub_dev->su_dev_flags &
> - SDF_EMULATED_VPD_UNIT_SERIAL) {
> - buf[3] = 3;
> - buf[5] = 0x80;
> - buf[6] = 0x83;
> - buf[7] = 0x86;
> - len = 3;
> - }
> - break;
> - case 0x80: /* unit serial number */
> - buf[1] = 0x80;
> - if (dev->se_sub_dev->su_dev_flags &
> - SDF_EMULATED_VPD_UNIT_SERIAL) {
> -
> - unit_serial_len =
> - strlen(&DEV_T10_WWN(dev)->unit_serial[0]);
> - unit_serial_len++; /* For NULL Terminator */
> -
> - if (((len + 4) + unit_serial_len) > cmd->data_length) {
> - len += unit_serial_len;
> - goto set_len;
> - }
> - len += sprintf((unsigned char *)&buf[4], "%s",
> - &DEV_T10_WWN(dev)->unit_serial[0]);
> - len++; /* Extra Byte for NULL Terminator */
> - buf[3] = len;
> - }
> - break;
> - case 0x83:
> - /*
> - * Device identification VPD, for a complete list of
> - * DESIGNATOR TYPEs see spc4r17 Table 459.
> - */
> - buf[1] = 0x83;
> - off = 4;
> - /*
> - * NAA IEEE Registered Extended Assigned designator format,
> - * see spc4r17 section 7.7.3.6.5
> - *
> - * We depend upon a target_core_mod/ConfigFS provided
> - * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial
> - * value in order to return the NAA id.
> - */
> - if (!(dev->se_sub_dev->su_dev_flags &
> - SDF_EMULATED_VPD_UNIT_SERIAL))
> - goto check_t10_vend_desc;
> - if ((off + 20) > cmd->data_length)
> - goto check_t10_vend_desc;
> - /* CODE SET == Binary */
> - buf[off++] = 0x1;
> - /* Set ASSOICATION == 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
> - */
> - binary = transport_asciihex_to_binaryhex(
> - &DEV_T10_WWN(dev)->unit_serial[0]);
> - buf[off++] |= (binary & 0xf0) >> 4;
> - for (i = 0; i < 24; i += 2) {
> - binary_new = transport_asciihex_to_binaryhex(
> - &DEV_T10_WWN(dev)->unit_serial[i+2]);
> - buf[off] = (binary & 0x0f) << 4;
> - buf[off++] |= (binary_new & 0xf0) >> 4;
> - binary = binary_new;
> - }
> - len = 20;
> - off = (len + 4);
> -check_t10_vend_desc:
> - /*
> - * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4
> - */
> - id_len = 8; /* For Vendor field */
> - prod_len = 4; /* For VPD Header */
> - prod_len += 8; /* For Vendor field */
> - prod_len += strlen(prod);
> - prod_len++; /* For : */
> -
> - if (dev->se_sub_dev->su_dev_flags &
> - SDF_EMULATED_VPD_UNIT_SERIAL) {
> - unit_serial_len =
> - strlen(&DEV_T10_WWN(dev)->unit_serial[0]);
> - unit_serial_len++; /* For NULL Terminator */
> -
> - if ((len + (id_len + 4) +
> - (prod_len + unit_serial_len)) >
> - cmd->data_length) {
> - len += (prod_len + unit_serial_len);
> - goto check_port;
> - }
> - id_len += sprintf((unsigned char *)&buf[off+12],
> - "%s:%s", prod,
> - &DEV_T10_WWN(dev)->unit_serial[0]);
> - }
> - buf[off] = 0x2; /* ASCII */
> - buf[off+1] = 0x1; /* T10 Vendor ID */
> - buf[off+2] = 0x0;
> - memcpy((unsigned char *)&buf[off+4], "LIO-ORG", 8);
> - /* Extra Byte for NULL Terminator */
> - id_len++;
> - /* Identifier Length */
> - buf[off+3] = id_len;
> - /* Header size for Designation descriptor */
> - len += (id_len + 4);
> - off += (id_len + 4);
> - /*
> - * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD
> - */
> -check_port:
> - port = lun->lun_sep;
> - if (port) {
> - struct t10_alua_lu_gp *lu_gp;
> - u32 padding, scsi_name_len;
> - u16 lu_gp_id = 0;
> - u16 tg_pt_gp_id = 0;
> - u16 tpgt;
> -
> - tpg = port->sep_tpg;
> - /*
> - * Relative target port identifer, see spc4r17
> - * section 7.7.3.7
> - *
> - * Get the PROTOCOL IDENTIFIER as defined by spc4r17
> - * section 7.5.1 Table 362
> - */
> - if (((len + 4) + 8) > cmd->data_length) {
> - len += 8;
> - goto check_tpgi;
> - }
> - buf[off] =
> - (TPG_TFO(tpg)->get_fabric_proto_ident(tpg) << 4);
> - buf[off++] |= 0x1; /* CODE SET == Binary */
> - buf[off] = 0x80; /* Set PIV=1 */
> - /* Set ASSOICATION == target port: 01b */
> - buf[off] |= 0x10;
> - /* DESIGNATOR TYPE == Relative target port identifer */
> - buf[off++] |= 0x4;
> - off++; /* Skip over Reserved */
> - buf[off++] = 4; /* DESIGNATOR LENGTH */
> - /* Skip over Obsolete field in RTPI payload
> - * in Table 472 */
> - off += 2;
> - buf[off++] = ((port->sep_rtpi >> 8) & 0xff);
> - buf[off++] = (port->sep_rtpi & 0xff);
> - len += 8; /* Header size + Designation descriptor */
> - /*
> - * Target port group identifier, see spc4r17
> - * section 7.7.3.8
> - *
> - * Get the PROTOCOL IDENTIFIER as defined by spc4r17
> - * section 7.5.1 Table 362
> - */
> -check_tpgi:
> - if (T10_ALUA(dev->se_sub_dev)->alua_type !=
> - SPC3_ALUA_EMULATED)
> - goto check_scsi_name;
> -
> - if (((len + 4) + 8) > cmd->data_length) {
> - len += 8;
> - goto check_lu_gp;
> - }
> - tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
> - if (!(tg_pt_gp_mem))
> - goto check_lu_gp;
> -
> - spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
> - tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
> - if (!(tg_pt_gp)) {
> - spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
> - goto check_lu_gp;
> - }
> - tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id;
> - spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
> -
> - buf[off] =
> - (TPG_TFO(tpg)->get_fabric_proto_ident(tpg) << 4);
> - buf[off++] |= 0x1; /* CODE SET == Binary */
> - buf[off] = 0x80; /* Set PIV=1 */
> - /* Set ASSOICATION == 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:
> - if (((len + 4) + 8) > cmd->data_length) {
> - len += 8;
> - goto check_scsi_name;
> - }
> - lu_gp_mem = dev->dev_alua_lu_gp_mem;
> - if (!(lu_gp_mem))
> - goto check_scsi_name;
> -
> - spin_lock(&lu_gp_mem->lu_gp_mem_lock);
> - lu_gp = lu_gp_mem->lu_gp;
> - if (!(lu_gp)) {
> - spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
> - goto check_scsi_name;
> - }
> - lu_gp_id = lu_gp->lu_gp_id;
> - spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
> -
> - buf[off++] |= 0x1; /* CODE SET == Binary */
> - /* DESIGNATOR TYPE == Logical Unit Group identifier */
> - buf[off++] |= 0x6;
> - off++; /* Skip over Reserved */
> - buf[off++] = 4; /* DESIGNATOR LENGTH */
> - off += 2; /* Skip over Reserved Field */
> - buf[off++] = ((lu_gp_id >> 8) & 0xff);
> - buf[off++] = (lu_gp_id & 0xff);
> - len += 8; /* Header size + Designation descriptor */
> - /*
> - * SCSI name string designator, see spc4r17
> - * section 7.7.3.11
> - *
> - * Get the PROTOCOL IDENTIFIER as defined by spc4r17
> - * section 7.5.1 Table 362
> - */
> -check_scsi_name:
> - scsi_name_len = strlen(TPG_TFO(tpg)->tpg_get_wwn(tpg));
> - /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */
> - scsi_name_len += 10;
> - /* Check for 4-byte padding */
> - padding = ((-scsi_name_len) & 3);
> - if (padding != 0)
> - scsi_name_len += padding;
> - /* Header size + Designation descriptor */
> - scsi_name_len += 4;
> -
> - if (((len + 4) + scsi_name_len) > cmd->data_length) {
> - len += scsi_name_len;
> - goto set_len;
> - }
> - buf[off] =
> - (TPG_TFO(tpg)->get_fabric_proto_ident(tpg) << 4);
> - buf[off++] |= 0x3; /* CODE SET == UTF-8 */
> - buf[off] = 0x80; /* Set PIV=1 */
> - /* Set ASSOICATION == target port: 01b */
> - buf[off] |= 0x10;
> - /* DESIGNATOR TYPE == SCSI name string */
> - buf[off++] |= 0x8;
> - off += 2; /* Skip over Reserved and length */
> - /*
> - * SCSI name string identifer containing, $FABRIC_MOD
> - * dependent information. For LIO-Target and iSCSI
> - * Target Port, this means "<iSCSI name>,t,0x<TPGT> in
> - * UTF-8 encoding.
> - */
> - tpgt = TPG_TFO(tpg)->tpg_get_tag(tpg);
> - scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x",
> - TPG_TFO(tpg)->tpg_get_wwn(tpg), tpgt);
> - scsi_name_len += 1 /* Include NULL terminator */;
> - /*
> - * The null-terminated, null-padded (see 4.4.2) SCSI
> - * NAME STRING field contains a UTF-8 format string.
> - * The number of bytes in the SCSI NAME STRING field
> - * (i.e., the value in the DESIGNATOR LENGTH field)
> - * shall be no larger than 256 and shall be a multiple
> - * of four.
> - */
> - if (padding)
> - scsi_name_len += padding;
> -
> - buf[off-1] = scsi_name_len;
> - off += scsi_name_len;
> - /* Header size + Designation descriptor */
> - len += (scsi_name_len + 4);
> - }
> -set_len:
> - buf[2] = ((len >> 8) & 0xff);
> - buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */
> - break;
> - case 0x86: /* Extended INQUIRY Data VPD Page */
> - /*
> - * This page uses a hardcoded value of 60
> - */
> - if (cmd->data_length < 60)
> - return 0;
> -
> - buf[1] = 0x86;
> - buf[2] = 0x3c;
> - /* Set HEADSUP, ORDSUP, SIMPSUP */
> - buf[5] = 0x07;
> - /* If WriteCache emulation is enabled, set V_SUP */
> - if (DEV_ATTRIB(dev)->emulate_write_cache > 0)
> - buf[6] = 0x01;
> -
> - break;
> - case 0xb0: /* Block Limits VPD page */
> - /*
> - * Following sbc3r22 section 6.5.3 Block Limits VPD page,
> - * when emulate_tpu=1 or emulate_tpws=1 we will be expect
> - * a different page length for Thin Provisioning.
> - */
> - if (!(DEV_ATTRIB(dev)->emulate_tpu) &&
> - !(DEV_ATTRIB(dev)->emulate_tpws)) {
> - if (cmd->data_length < (0x10 + 4)) {
> - printk(KERN_INFO "Received data_length: %u"
> - " too small for TPE=1 EVPD 0xb0\n",
> - cmd->data_length);
> - return -1;
> - }
> - buf[0] = TRANSPORT(dev)->get_device_type(dev);
> - buf[1] = 0xb0;
> - buf[3] = 0x10; /* Set hardcoded TPE=0 length */
> - /*
> - * Set OPTIMAL TRANSFER LENGTH GRANULARITY
> - */
> - put_unaligned_be16(1, &buf[6]);
> - /*
> - * Set MAXIMUM TRANSFER LENGTH
> - */
> - put_unaligned_be32(DEV_ATTRIB(dev)->max_sectors,
> - &buf[8]);
> - /*
> - * Set OPTIMAL TRANSFER LENGTH
> - */
> - put_unaligned_be32(DEV_ATTRIB(dev)->optimal_sectors,
> - &buf[12]);
> - break;
> - }
> -
> - if (cmd->data_length < (0x3c + 4)) {
> - printk(KERN_INFO "Received data_length: %u"
> - " too small for TPE=1 EVPD 0xb0\n",
> - cmd->data_length);
> - return -1;
> - }
> - buf[0] = TRANSPORT(dev)->get_device_type(dev);
> - buf[1] = 0xb0;
> - buf[3] = 0x3c; /* Set hardcoded TPE=1 length */
> - /*
> - * Set OPTIMAL TRANSFER LENGTH GRANULARITY
> - * Note that this follows what scsi_debug.c reports to SCSI ML
> - */
> - put_unaligned_be16(1, &buf[6]);
> - /*
> - * Set MAXIMUM TRANSFER LENGTH
> - */
> - put_unaligned_be32(DEV_ATTRIB(dev)->max_sectors, &buf[8]);
> - /*
> - * Set OPTIMAL TRANSFER LENGTH
> - */
> - put_unaligned_be32(DEV_ATTRIB(dev)->optimal_sectors, &buf[12]);
> - /*
> - * Set MAXIMUM UNMAP LBA COUNT
> - */
> - put_unaligned_be32(DEV_ATTRIB(dev)->max_unmap_lba_count,
> - &buf[20]);
> - /*
> - * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT
> - */
> - put_unaligned_be32(DEV_ATTRIB(dev)->max_unmap_block_desc_count,
> - &buf[24]);
> - /*
> - * Set OPTIMAL UNMAP GRANULARITY
> - */
> - put_unaligned_be32(DEV_ATTRIB(dev)->unmap_granularity,
> - &buf[28]);
> - /*
> - * UNMAP GRANULARITY ALIGNMENT
> - */
> - put_unaligned_be32(DEV_ATTRIB(dev)->unmap_granularity_alignment,
> - &buf[32]);
> - if (DEV_ATTRIB(dev)->unmap_granularity_alignment != 0)
> - buf[32] |= 0x80; /* Set the UGAVALID bit */
> - break;
> - case 0xb2: /* Thin Provisioning VPD */
> - /*
> - * From sbc3r22 section 6.5.4 Thin Provisioning VPD page:
> - *
> - * The PAGE LENGTH field is defined in SPC-4. If the DP bit is
> - * set to zero, then the page length shall be set to 0004h. If the
> - * DP bit is set to one, then the page length shall be set to the value
> - * defined in table 162.
> - */
> - buf[0] = TRANSPORT(dev)->get_device_type(dev);
> - buf[1] = 0xb2;
> - /*
> - * Set Hardcoded length mentioned above for DP=0
> - */
> - put_unaligned_be16(0x0004, &buf[2]);
> - /*
> - * The THRESHOLD EXPONENT field indicates the threshold set size in LBAs
> - * as a power of 2 (i.e., the threshold set size is equal to 2(threshold exponent)).
> - *
> - * Note that this is currently set to 0x00 as mkp says it will be
> - * changing again. We can enable this once it has settled in T10
> - * and is actually used by Linux/SCSI ML code.
> - */
> - buf[4] = 0x00;
> - /*
> - * A TPU bit set to one indicates that the device server supports
> - * the UNMAP command (see 5.25). A TPU bit set to zero indicates
> - * that the device server does not support the UNMAP command.
> - */
> - if (DEV_ATTRIB(dev)->emulate_tpu != 0)
> - buf[5] = 0x80;
> - /*
> - * A TPWS bit set to one indicates that the device server supports
> - * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs.
> - * A TPWS bit set to zero indicates that the device server does not
> - * support the use of the WRITE SAME (16) command to unmap LBAs.
> - */
> - if (DEV_ATTRIB(dev)->emulate_tpws != 0)
> - buf[5] |= 0x40;
> - break;
> - default:
> - printk(KERN_ERR "Unknown VPD Code: 0x%02x\n", cdb[2]);
> - return -1;
> - }
> -
> - return 0;
> -}
> -EXPORT_SYMBOL(transport_generic_emulate_inquiry);
> -
> -int transport_generic_emulate_readcapacity(
> - struct se_cmd *cmd,
> - u32 blocks)
> -{
> - struct se_device *dev = SE_DEV(cmd);
> - unsigned char *buf = (unsigned char *) T_TASK(cmd)->t_task_buf;
> -
> - buf[0] = (blocks >> 24) & 0xff;
> - buf[1] = (blocks >> 16) & 0xff;
> - buf[2] = (blocks >> 8) & 0xff;
> - buf[3] = blocks & 0xff;
> - buf[4] = (DEV_ATTRIB(dev)->block_size >> 24) & 0xff;
> - buf[5] = (DEV_ATTRIB(dev)->block_size >> 16) & 0xff;
> - buf[6] = (DEV_ATTRIB(dev)->block_size >> 8) & 0xff;
> - buf[7] = DEV_ATTRIB(dev)->block_size & 0xff;
> - /*
> - * Set max 32-bit blocks to signal SERVICE ACTION READ_CAPACITY_16
> - */
> - if (DEV_ATTRIB(dev)->emulate_tpu || DEV_ATTRIB(dev)->emulate_tpws)
> - put_unaligned_be32(0xFFFFFFFF, &buf[0]);
> -
> - return 0;
> -}
> -EXPORT_SYMBOL(transport_generic_emulate_readcapacity);
> -
> -int transport_generic_emulate_readcapacity_16(
> - struct se_cmd *cmd,
> - unsigned long long blocks)
> -{
> - struct se_device *dev = SE_DEV(cmd);
> - unsigned char *buf = (unsigned char *) T_TASK(cmd)->t_task_buf;
> -
> - buf[0] = (blocks >> 56) & 0xff;
> - buf[1] = (blocks >> 48) & 0xff;
> - buf[2] = (blocks >> 40) & 0xff;
> - buf[3] = (blocks >> 32) & 0xff;
> - buf[4] = (blocks >> 24) & 0xff;
> - buf[5] = (blocks >> 16) & 0xff;
> - buf[6] = (blocks >> 8) & 0xff;
> - buf[7] = blocks & 0xff;
> - buf[8] = (DEV_ATTRIB(dev)->block_size >> 24) & 0xff;
> - buf[9] = (DEV_ATTRIB(dev)->block_size >> 16) & 0xff;
> - buf[10] = (DEV_ATTRIB(dev)->block_size >> 8) & 0xff;
> - buf[11] = DEV_ATTRIB(dev)->block_size & 0xff;
> - /*
> - * Set Thin Provisioning Enable bit following sbc3r22 in section
> - * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled.
> - */
> - if (DEV_ATTRIB(dev)->emulate_tpu || DEV_ATTRIB(dev)->emulate_tpws)
> - buf[14] = 0x80;
> -
> - return 0;
> -}
> -EXPORT_SYMBOL(transport_generic_emulate_readcapacity_16);
> -
> -static int transport_modesense_rwrecovery(unsigned char *p)
> -{
> - p[0] = 0x01;
> - p[1] = 0x0a;
> -
> - return 12;
> -}
> -
> -static int transport_modesense_control(struct se_device *dev, unsigned char *p)
> -{
> - p[0] = 0x0a;
> - p[1] = 0x0a;
> - p[2] = 2;
> - /*
> - * From spc4r17, section 7.4.6 Control mode Page
> - *
> - * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b
> - *
> - * 00b: The logical unit shall clear any unit attention condition
> - * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
> - * status and shall not establish a unit attention condition when a com-
> - * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT
> - * status.
> - *
> - * 10b: The logical unit shall not clear any unit attention condition
> - * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
> - * status and shall not establish a unit attention condition when
> - * a command is completed with BUSY, TASK SET FULL, or RESERVATION
> - * CONFLICT status.
> - *
> - * 11b a The logical unit shall not clear any unit attention condition
> - * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
> - * status and shall establish a unit attention condition for the
> - * initiator port associated with the I_T nexus on which the BUSY,
> - * TASK SET FULL, or RESERVATION CONFLICT status is being returned.
> - * Depending on the status, the additional sense code shall be set to
> - * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS
> - * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE
> - * command, a unit attention condition shall be established only once
> - * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless
> - * to the number of commands completed with one of those status codes.
> - */
> - p[4] = (DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl == 2) ? 0x30 :
> - (DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00;
> - /*
> - * From spc4r17, section 7.4.6 Control mode Page
> - *
> - * Task Aborted Status (TAS) bit set to zero.
> - *
> - * A task aborted status (TAS) bit set to zero specifies that aborted
> - * tasks shall be terminated by the device server without any response
> - * to the application client. A TAS bit set to one specifies that tasks
> - * aborted by the actions of an I_T nexus other than the I_T nexus on
> - * which the command was received shall be completed with TASK ABORTED
> - * status (see SAM-4).
> - */
> - p[5] = (DEV_ATTRIB(dev)->emulate_tas) ? 0x40 : 0x00;
> - p[8] = 0xff;
> - p[9] = 0xff;
> - p[11] = 30;
> -
> - return 12;
> -}
> -
> -static int transport_modesense_caching(struct se_device *dev, unsigned char *p)
> -{
> - p[0] = 0x08;
> - p[1] = 0x12;
> - if (DEV_ATTRIB(dev)->emulate_write_cache > 0)
> - p[2] = 0x04; /* Write Cache Enable */
> - p[12] = 0x20; /* Disabled Read Ahead */
> -
> - return 20;
> -}
> -
> -#if 0
> -static int transport_modesense_devicecaps(unsigned char *p)
> -{
> - p[0] = 0x2a;
> - p[1] = 0x0a;
> -
> - return 12;
> -}
> -#endif
> -
> -static void transport_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 transport_modesense_dpofua(
> - unsigned char *buf,
> - int type)
> -{
> - switch (type) {
> - case TYPE_DISK:
> - buf[0] |= 0x10; /* DPOFUA bit */
> - break;
> - default:
> - break;
> - }
> -}
> -
> -int transport_generic_emulate_modesense(
> - struct se_cmd *cmd,
> - unsigned char *cdb,
> - unsigned char *rbuf,
> - int ten,
> - int type)
> -{
> - struct se_device *dev = SE_DEV(cmd);
> - int offset = (ten) ? 8 : 4;
> - int length = 0;
> - unsigned char buf[SE_MODE_PAGE_BUF];
> -
> - memset(buf, 0, SE_MODE_PAGE_BUF);
> -
> - switch (cdb[2] & 0x3f) {
> - case 0x01:
> - length = transport_modesense_rwrecovery(&buf[offset]);
> - break;
> - case 0x08:
> - length = transport_modesense_caching(dev, &buf[offset]);
> - break;
> - case 0x0a:
> - length = transport_modesense_control(dev, &buf[offset]);
> - break;
> -#if 0
> - case 0x2a:
> - length = transport_modesense_devicecaps(&buf[offset]);
> - break;
> -#endif
> - case 0x3f:
> - length = transport_modesense_rwrecovery(&buf[offset]);
> - length += transport_modesense_caching(dev, &buf[offset+length]);
> - length += transport_modesense_control(dev, &buf[offset+length]);
> -#if 0
> - length += transport_modesense_devicecaps(&buf[offset+length]);
> -#endif
> - break;
> - default:
> - printk(KERN_ERR "Got Unknown Mode Page: 0x%02x\n",
> - cdb[2] & 0x3f);
> - return PYX_TRANSPORT_UNKNOWN_MODE_PAGE;
> - }
> - offset += length;
> -
> - if (ten) {
> - offset -= 2;
> - buf[0] = (offset >> 8) & 0xff;
> - buf[1] = offset & 0xff;
> -
> - if ((SE_LUN(cmd)->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) ||
> - (cmd->se_deve &&
> - (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
> - transport_modesense_write_protect(&buf[3], type);
> -
> - if ((DEV_ATTRIB(dev)->emulate_write_cache > 0) &&
> - (DEV_ATTRIB(dev)->emulate_fua_write > 0))
> - transport_modesense_dpofua(&buf[3], type);
> -
> - if ((offset + 2) > cmd->data_length)
> - offset = cmd->data_length;
> -
> - } else {
> - offset -= 1;
> - buf[0] = offset & 0xff;
> -
> - if ((SE_LUN(cmd)->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) ||
> - (cmd->se_deve &&
> - (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
> - transport_modesense_write_protect(&buf[2], type);
> -
> - if ((DEV_ATTRIB(dev)->emulate_write_cache > 0) &&
> - (DEV_ATTRIB(dev)->emulate_fua_write > 0))
> - transport_modesense_dpofua(&buf[2], type);
> -
> - if ((offset + 1) > cmd->data_length)
> - offset = cmd->data_length;
> - }
> - memcpy(rbuf, buf, offset);
> -
> - return 0;
> -}
> -EXPORT_SYMBOL(transport_generic_emulate_modesense);
> -
> -int transport_generic_emulate_request_sense(
> - struct se_cmd *cmd,
> - unsigned char *cdb)
> -{
> - unsigned char *buf = (unsigned char *) T_TASK(cmd)->t_task_buf;
> - u8 ua_asc = 0, ua_ascq = 0;
> -
> - if (cdb[1] & 0x01) {
> - printk(KERN_ERR "REQUEST_SENSE description emulation not"
> - " supported\n");
> - return PYX_TRANSPORT_INVALID_CDB_FIELD;
> - }
> - if (!(core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq))) {
> - /*
> - * CURRENT ERROR, UNIT ATTENTION
> - */
> - buf[0] = 0x70;
> - buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION;
> - /*
> - * Make sure request data length is enough for additional
> - * sense data.
> - */
> - if (cmd->data_length <= 18) {
> - buf[7] = 0x00;
> - return 0;
> - }
> - /*
> - * The Additional Sense Code (ASC) from the UNIT ATTENTION
> - */
> - buf[SPC_ASC_KEY_OFFSET] = ua_asc;
> - buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq;
> - buf[7] = 0x0A;
> - } else {
> - /*
> - * CURRENT ERROR, NO SENSE
> - */
> - buf[0] = 0x70;
> - buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE;
> - /*
> - * Make sure request data length is enough for additional
> - * sense data.
> - */
> - if (cmd->data_length <= 18) {
> - buf[7] = 0x00;
> - return 0;
> - }
> - /*
> - * NO ADDITIONAL SENSE INFORMATION
> - */
> - buf[SPC_ASC_KEY_OFFSET] = 0x00;
> - buf[7] = 0x0A;
> - }
> -
> - return 0;
> -}
> -EXPORT_SYMBOL(transport_generic_emulate_request_sense);
> -
> static void transport_xor_callback(struct se_cmd *cmd)
> {
> unsigned char *buf, *addr;
> @@ -5385,215 +4520,6 @@ int transport_get_sense_data(struct se_c
> return -1;
> }
>
> -/*
> - * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
> - * Note this is not used for TCM/pSCSI passthrough
> - */
> -static int transport_generic_unmap(struct se_task *task)
> -{
> - struct se_cmd *cmd = TASK_CMD(task);
> - struct se_device *dev = SE_DEV(cmd);
> - unsigned char *buf = T_TASK(cmd)->t_task_buf, *ptr = NULL;
> - unsigned char *cdb = &T_TASK(cmd)->t_task_cdb[0];
> - sector_t lba;
> - unsigned int size = cmd->data_length, range;
> - int ret, offset = 8; /* First UNMAP block descriptor starts at 8 byte offset */
> - unsigned short dl, bd_dl;
> -
> - /* Skip over UNMAP header */
> - size -= 8;
> - dl = get_unaligned_be16(&cdb[0]);
> - bd_dl = get_unaligned_be16(&cdb[2]);
> - ptr = &buf[offset];
> - printk(KERN_INFO "UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu"
> - " ptr: %p\n", TRANSPORT(dev)->name, dl, bd_dl, size, ptr);
> -
> - while (size) {
> - lba = get_unaligned_be64(&ptr[0]);
> - range = get_unaligned_be32(&ptr[8]);
> - printk(KERN_INFO "UNMAP: Using lba: %llu and range: %u\n",
> - (unsigned long long)lba, range);
> -
> - ret = TRANSPORT(dev)->do_discard(dev, lba, range);
> - if (ret < 0) {
> - printk(KERN_ERR "blkdev_issue_discard() failed: %d\n", ret);
> - return -1;
> - }
> -
> - ptr += 16;
> - size -= 16;
> - }
> -
> - task->task_scsi_status = GOOD;
> - transport_complete_task(task, 1);
> - return 0;
> -}
> -
> -/*
> - * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
> - * Note this is not used for TCM/pSCSI passthrough
> - */
> -static int transport_generic_write_same(struct se_task *task)
> -{
> - struct se_cmd *cmd = TASK_CMD(task);
> - struct se_device *dev = SE_DEV(cmd);
> - sector_t lba;
> - unsigned int range;
> - int ret;
> -
> - lba = T_TASK(cmd)->t_task_lba;
> - range = (cmd->data_length / DEV_ATTRIB(dev)->block_size);
> -
> - printk(KERN_INFO "WRITE_SAME UNMAP: LBA: %llu Range: %u\n",
> - (unsigned long long)lba, range);
> -
> - ret = TRANSPORT(dev)->do_discard(dev, lba, range);
> - if (ret < 0) {
> - printk(KERN_INFO "blkdev_issue_discard() failed for WRITE_SAME\n");
> - return -1;
> - }
> -
> - task->task_scsi_status = GOOD;
> - transport_complete_task(task, 1);
> - return 0;
> -}
> -
> -/*
> - * Used by TCM subsystem plugins IBLOCK, FILEIO, and RAMDISK as a
> - * generic non SCF_SCSI_DATA_SG_IO_CDB ops.
> - */
> -int transport_emulate_control_cdb(struct se_task *task)
> -{
> - struct se_cmd *cmd = TASK_CMD(task);
> - struct se_device *dev = SE_DEV(cmd);
> - sector_t blocks_long;
> - unsigned int blocks;
> - int ret;
> - unsigned short service_action;
> -
> - switch (T_TASK(cmd)->t_task_cdb[0]) {
> - case INQUIRY:
> - ret = transport_generic_emulate_inquiry(cmd,
> - TRANSPORT(dev)->get_device_type(dev),
> - &DEV_T10_WWN(dev)->model[0],
> - &DEV_T10_WWN(dev)->revision[0]);
> - if (ret < 0)
> - return ret;
> - break;
> - case READ_CAPACITY:
> - blocks = TRANSPORT(dev)->get_blocks(dev);
> - ret = transport_generic_emulate_readcapacity(cmd,
> - blocks);
> - if (ret < 0)
> - return ret;
> - break;
> - case MODE_SENSE:
> - ret = transport_generic_emulate_modesense(TASK_CMD(task),
> - T_TASK(cmd)->t_task_cdb,
> - T_TASK(cmd)->t_task_buf, 0,
> - TRANSPORT(dev)->get_device_type(dev));
> - if (ret < 0)
> - return ret;
> - break;
> - case MODE_SENSE_10:
> - ret = transport_generic_emulate_modesense(TASK_CMD(task),
> - T_TASK(cmd)->t_task_cdb,
> - T_TASK(cmd)->t_task_buf, 1,
> - TRANSPORT(dev)->get_device_type(dev));
> - if (ret < 0)
> - return ret;
> - break;
> - case SERVICE_ACTION_IN:
> - switch (T_TASK(cmd)->t_task_cdb[1] & 0x1f) {
> - case SAI_READ_CAPACITY_16:
> - blocks_long = TRANSPORT(dev)->get_blocks(dev);
> - ret = transport_generic_emulate_readcapacity_16(cmd,
> - blocks_long);
> - if (ret < 0)
> - return ret;
> - break;
> - default:
> - printk(KERN_ERR "Unsupported SA: 0x%02x\n",
> - T_TASK(cmd)->t_task_cdb[1] & 0x1f);
> - return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
> - }
> - case REQUEST_SENSE:
> - ret = transport_generic_emulate_request_sense(cmd,
> - T_TASK(cmd)->t_task_cdb);
> - if (ret < 0)
> - return ret;
> - break;
> - case UNMAP:
> - if (!(TRANSPORT(dev)->do_discard)) {
> - printk(KERN_ERR "UNMAP emulation not supported for: %s\n",
> - TRANSPORT(dev)->name);
> - return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
> - }
> - ret = transport_generic_unmap(task);
> - if (ret < 0)
> - return ret;
> - break;
> - case WRITE_SAME_16:
> - if (!(TRANSPORT(dev)->do_discard)) {
> - printk(KERN_ERR "WRITE_SAME_16 emulation not supported"
> - " for: %s\n", TRANSPORT(dev)->name);
> - return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
> - }
> - ret = transport_generic_write_same(task);
> - if (ret < 0)
> - return ret;
> - break;
> - case VARIABLE_LENGTH_CMD:
> - service_action = get_unaligned_be16(&T_TASK(cmd)->t_task_cdb[8]);
> - switch (service_action) {
> - case WRITE_SAME_32:
> - if (!(TRANSPORT(dev)->do_discard)) {
> - printk(KERN_ERR "WRITE_SAME_32 SA emulation not"
> - " supported for: %s\n", TRANSPORT(dev)->name);
> - return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
> - }
> - ret = transport_generic_write_same(task);
> - if (ret < 0)
> - return ret;
> - break;
> - default:
> - printk(KERN_ERR "Unsupported VARIABLE_LENGTH_CMD SA:"
> - " 0x%02x\n", service_action);
> - break;
> - }
> - break;
> - case SYNCHRONIZE_CACHE:
> - case 0x91: /* SYNCHRONIZE_CACHE_16: */
> - if (!(TRANSPORT(dev)->do_sync_cache)) {
> - printk(KERN_ERR "SYNCHRONIZE_CACHE emulation not supported"
> - " for: %s\n", TRANSPORT(dev)->name);
> - return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
> - }
> - TRANSPORT(dev)->do_sync_cache(task);
> - break;
> - case ALLOW_MEDIUM_REMOVAL:
> - case ERASE:
> - case REZERO_UNIT:
> - case SEEK_10:
> - case SPACE:
> - case START_STOP:
> - case TEST_UNIT_READY:
> - case VERIFY:
> - case WRITE_FILEMARKS:
> - break;
> - default:
> - printk(KERN_ERR "Unsupported SCSI Opcode: 0x%02x for %s\n",
> - T_TASK(cmd)->t_task_cdb[0], TRANSPORT(dev)->name);
> - return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
> - }
> -
> - task->task_scsi_status = GOOD;
> - transport_complete_task(task, 1);
> -
> - return PYX_TRANSPORT_SENT_TO_TRANSPORT;
> -}
> -EXPORT_SYMBOL(transport_emulate_control_cdb);
> -
> static inline void transport_dev_get_mem_buf(
> struct se_device *dev,
> struct se_cmd *cmd)
> Index: lio-core-2.6/include/target/target_core_transport.h
> ===================================================================
> --- lio-core-2.6.orig/include/target/target_core_transport.h 2010-11-08 17:06:49.151529680 +0100
> +++ lio-core-2.6/include/target/target_core_transport.h 2010-11-08 17:06:49.221529679 +0100
> @@ -221,16 +221,6 @@ extern void transport_stop_task_timer(st
> extern void transport_stop_all_task_timers(struct se_cmd *);
> extern int transport_execute_tasks(struct se_cmd *);
> extern unsigned char transport_asciihex_to_binaryhex(unsigned char val[2]);
> -extern int transport_generic_emulate_inquiry(struct se_cmd *, unsigned char,
> - unsigned char *, unsigned char *);
> -extern int transport_generic_emulate_readcapacity(struct se_cmd *, u32);
> -extern int transport_generic_emulate_readcapacity_16(struct se_cmd *,
> - unsigned long long);
> -extern int transport_generic_emulate_modesense(struct se_cmd *,
> - unsigned char *,
> - unsigned char *, int, int);
> -extern int transport_generic_emulate_request_sense(struct se_cmd *,
> - unsigned char *);
> extern int transport_get_sense_data(struct se_cmd *);
> extern int transport_emulate_control_cdb(struct se_task *);
> extern struct se_cmd *transport_allocate_passthrough(unsigned char *, int, u32,
> Index: lio-core-2.6/drivers/target/Kbuild
> ===================================================================
> --- lio-core-2.6.orig/drivers/target/Kbuild 2010-11-08 17:07:01.288196347 +0100
> +++ lio-core-2.6/drivers/target/Kbuild 2010-11-08 17:07:18.058196348 +0100
> @@ -11,6 +11,7 @@ target_core_mod-y := target_core_config
> target_core_tmr.o \
> target_core_tpg.o \
> target_core_transport.o \
> + target_core_cdb.o \
> target_core_ua.o \
> target_core_rd.o \
> target_core_mib.o
> --
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