Pileus Git - ~andy/linux/blob - drivers/target/target_core_cdb.c

   1 /*
   2  * CDB emulation for non-READ/WRITE commands.
   3  *
   4  * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc.
   5  * Copyright (c) 2005, 2006, 2007 SBE, Inc.
   6  * Copyright (c) 2007-2010 Rising Tide Systems
   7  * Copyright (c) 2008-2010 Linux-iSCSI.org
   8  *
   9  * Nicholas A. Bellinger <nab@kernel.org>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  24  */
  25
  26 #include <asm/unaligned.h>
  27 #include <scsi/scsi.h>
  28
  29 #include <target/target_core_base.h>
  30 #include <target/target_core_transport.h>
  31 #include <target/target_core_fabric_ops.h>
  32 #include "target_core_ua.h"
  33
  34 static void
  35 target_fill_alua_data(struct se_port *port, unsigned char *buf)
  36 {
  37         struct t10_alua_tg_pt_gp *tg_pt_gp;
  38         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
  39
  40         /*
  41          * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS.
  42          */
  43         buf[5]  = 0x80;
  44
  45         /*
  46          * Set TPGS field for explict and/or implict ALUA access type
  47          * and opteration.
  48          *
  49          * See spc4r17 section 6.4.2 Table 135
  50          */
  51         if (!port)
  52                 return;
  53         tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
  54         if (!tg_pt_gp_mem)
  55                 return;
  56
  57         spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
  58         tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
  59         if (tg_pt_gp)
  60                 buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type;
  61         spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
  62 }
  63
  64 static int
  65 target_emulate_inquiry_std(struct se_cmd *cmd)
  66 {
  67         struct se_lun *lun = cmd->se_lun;
  68         struct se_device *dev = cmd->se_dev;
  69         unsigned char *buf;
  70
  71         /*
  72          * Make sure we at least have 6 bytes of INQUIRY response
  73          * payload going back for EVPD=0
  74          */
  75         if (cmd->data_length < 6) {
  76                 pr_err("SCSI Inquiry payload length: %u"
  77                         " too small for EVPD=0\n", cmd->data_length);
  78                 return -EINVAL;
  79         }
  80
  81         buf = transport_kmap_first_data_page(cmd);
  82
  83         buf[0] = dev->transport->get_device_type(dev);
  84         if (buf[0] == TYPE_TAPE)
  85                 buf[1] = 0x80;
  86         buf[2] = dev->transport->get_device_rev(dev);
  87
  88         /*
  89          * Enable SCCS and TPGS fields for Emulated ALUA
  90          */
  91         if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED)
  92                 target_fill_alua_data(lun->lun_sep, buf);
  93
  94         if (cmd->data_length < 8) {
  95                 buf[4] = 1; /* Set additional length to 1 */
  96                 goto out;
  97         }
  98
  99         buf[7] = 0x32; /* Sync=1 and CmdQue=1 */
 100
 101         /*
 102          * Do not include vendor, product, reversion info in INQUIRY
 103          * response payload for cdbs with a small allocation length.
 104          */
 105         if (cmd->data_length < 36) {
 106                 buf[4] = 3; /* Set additional length to 3 */
 107                 goto out;
 108         }
 109
 110         snprintf((unsigned char *)&buf[8], 8, "LIO-ORG");
 111         snprintf((unsigned char *)&buf[16], 16, "%s",
 112                  &dev->se_sub_dev->t10_wwn.model[0]);
 113         snprintf((unsigned char *)&buf[32], 4, "%s",
 114                  &dev->se_sub_dev->t10_wwn.revision[0]);
 115         buf[4] = 31; /* Set additional length to 31 */
 116
 117 out:
 118         transport_kunmap_first_data_page(cmd);
 119         return 0;
 120 }
 121
 122 /* unit serial number */
 123 static int
 124 target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf)
 125 {
 126         struct se_device *dev = cmd->se_dev;
 127         u16 len = 0;
 128
 129         if (dev->se_sub_dev->su_dev_flags &
 130                         SDF_EMULATED_VPD_UNIT_SERIAL) {
 131                 u32 unit_serial_len;
 132
 133                 unit_serial_len =
 134                         strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]);
 135                 unit_serial_len++; /* For NULL Terminator */
 136
 137                 if (((len + 4) + unit_serial_len) > cmd->data_length) {
 138                         len += unit_serial_len;
 139                         buf[2] = ((len >> 8) & 0xff);
 140                         buf[3] = (len & 0xff);
 141                         return 0;
 142                 }
 143                 len += sprintf((unsigned char *)&buf[4], "%s",
 144                         &dev->se_sub_dev->t10_wwn.unit_serial[0]);
 145                 len++; /* Extra Byte for NULL Terminator */
 146                 buf[3] = len;
 147         }
 148         return 0;
 149 }
 150
 151 /*
 152  * Device identification VPD, for a complete list of
 153  * DESIGNATOR TYPEs see spc4r17 Table 459.
 154  */
 155 static int
 156 target_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf)
 157 {
 158         struct se_device *dev = cmd->se_dev;
 159         struct se_lun *lun = cmd->se_lun;
 160         struct se_port *port = NULL;
 161         struct se_portal_group *tpg = NULL;
 162         struct t10_alua_lu_gp_member *lu_gp_mem;
 163         struct t10_alua_tg_pt_gp *tg_pt_gp;
 164         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
 165         unsigned char binary, binary_new;
 166         unsigned char *prod = &dev->se_sub_dev->t10_wwn.model[0];
 167         u32 prod_len;
 168         u32 unit_serial_len, off = 0;
 169         int i;
 170         u16 len = 0, id_len;
 171
 172         off = 4;
 173
 174         /*
 175          * NAA IEEE Registered Extended Assigned designator format, see
 176          * spc4r17 section 7.7.3.6.5
 177          *
 178          * We depend upon a target_core_mod/ConfigFS provided
 179          * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial
 180          * value in order to return the NAA id.
 181          */
 182         if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL))
 183                 goto check_t10_vend_desc;
 184
 185         if (off + 20 > cmd->data_length)
 186                 goto check_t10_vend_desc;
 187
 188         /* CODE SET == Binary */
 189         buf[off++] = 0x1;
 190
 191         /* Set ASSOICATION == addressed logical unit: 0)b */
 192         buf[off] = 0x00;
 193
 194         /* Identifier/Designator type == NAA identifier */
 195         buf[off++] = 0x3;
 196         off++;
 197
 198         /* Identifier/Designator length */
 199         buf[off++] = 0x10;
 200
 201         /*
 202          * Start NAA IEEE Registered Extended Identifier/Designator
 203          */
 204         buf[off++] = (0x6 << 4);
 205
 206         /*
 207          * Use OpenFabrics IEEE Company ID: 00 14 05
 208          */
 209         buf[off++] = 0x01;
 210         buf[off++] = 0x40;
 211         buf[off] = (0x5 << 4);
 212
 213         /*
 214          * Return ConfigFS Unit Serial Number information for
 215          * VENDOR_SPECIFIC_IDENTIFIER and
 216          * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION
 217          */
 218         binary = transport_asciihex_to_binaryhex(
 219                                 &dev->se_sub_dev->t10_wwn.unit_serial[0]);
 220         buf[off++] |= (binary & 0xf0) >> 4;
 221         for (i = 0; i < 24; i += 2) {
 222                 binary_new = transport_asciihex_to_binaryhex(
 223                         &dev->se_sub_dev->t10_wwn.unit_serial[i+2]);
 224                 buf[off] = (binary & 0x0f) << 4;
 225                 buf[off++] |= (binary_new & 0xf0) >> 4;
 226                 binary = binary_new;
 227         }
 228         len = 20;
 229         off = (len + 4);
 230
 231 check_t10_vend_desc:
 232         /*
 233          * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4
 234          */
 235         id_len = 8; /* For Vendor field */
 236         prod_len = 4; /* For VPD Header */
 237         prod_len += 8; /* For Vendor field */
 238         prod_len += strlen(prod);
 239         prod_len++; /* For : */
 240
 241         if (dev->se_sub_dev->su_dev_flags &
 242                         SDF_EMULATED_VPD_UNIT_SERIAL) {
 243                 unit_serial_len =
 244                         strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]);
 245                 unit_serial_len++; /* For NULL Terminator */
 246
 247                 if ((len + (id_len + 4) +
 248                     (prod_len + unit_serial_len)) >
 249                                 cmd->data_length) {
 250                         len += (prod_len + unit_serial_len);
 251                         goto check_port;
 252                 }
 253                 id_len += sprintf((unsigned char *)&buf[off+12],
 254                                 "%s:%s", prod,
 255                                 &dev->se_sub_dev->t10_wwn.unit_serial[0]);
 256         }
 257         buf[off] = 0x2; /* ASCII */
 258         buf[off+1] = 0x1; /* T10 Vendor ID */
 259         buf[off+2] = 0x0;
 260         memcpy((unsigned char *)&buf[off+4], "LIO-ORG", 8);
 261         /* Extra Byte for NULL Terminator */
 262         id_len++;
 263         /* Identifier Length */
 264         buf[off+3] = id_len;
 265         /* Header size for Designation descriptor */
 266         len += (id_len + 4);
 267         off += (id_len + 4);
 268         /*
 269          * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD
 270          */
 271 check_port:
 272         port = lun->lun_sep;
 273         if (port) {
 274                 struct t10_alua_lu_gp *lu_gp;
 275                 u32 padding, scsi_name_len;
 276                 u16 lu_gp_id = 0;
 277                 u16 tg_pt_gp_id = 0;
 278                 u16 tpgt;
 279
 280                 tpg = port->sep_tpg;
 281                 /*
 282                  * Relative target port identifer, see spc4r17
 283                  * section 7.7.3.7
 284                  *
 285                  * Get the PROTOCOL IDENTIFIER as defined by spc4r17
 286                  * section 7.5.1 Table 362
 287                  */
 288                 if (((len + 4) + 8) > cmd->data_length) {
 289                         len += 8;
 290                         goto check_tpgi;
 291                 }
 292                 buf[off] =
 293                         (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
 294                 buf[off++] |= 0x1; /* CODE SET == Binary */
 295                 buf[off] = 0x80; /* Set PIV=1 */
 296                 /* Set ASSOICATION == target port: 01b */
 297                 buf[off] |= 0x10;
 298                 /* DESIGNATOR TYPE == Relative target port identifer */
 299                 buf[off++] |= 0x4;
 300                 off++; /* Skip over Reserved */
 301                 buf[off++] = 4; /* DESIGNATOR LENGTH */
 302                 /* Skip over Obsolete field in RTPI payload
 303                  * in Table 472 */
 304                 off += 2;
 305                 buf[off++] = ((port->sep_rtpi >> 8) & 0xff);
 306                 buf[off++] = (port->sep_rtpi & 0xff);
 307                 len += 8; /* Header size + Designation descriptor */
 308                 /*
 309                  * Target port group identifier, see spc4r17
 310                  * section 7.7.3.8
 311                  *
 312                  * Get the PROTOCOL IDENTIFIER as defined by spc4r17
 313                  * section 7.5.1 Table 362
 314                  */
 315 check_tpgi:
 316                 if (dev->se_sub_dev->t10_alua.alua_type !=
 317                                 SPC3_ALUA_EMULATED)
 318                         goto check_scsi_name;
 319
 320                 if (((len + 4) + 8) > cmd->data_length) {
 321                         len += 8;
 322                         goto check_lu_gp;
 323                 }
 324                 tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
 325                 if (!tg_pt_gp_mem)
 326                         goto check_lu_gp;
 327
 328                 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
 329                 tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
 330                 if (!tg_pt_gp) {
 331                         spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
 332                         goto check_lu_gp;
 333                 }
 334                 tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id;
 335                 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
 336
 337                 buf[off] =
 338                         (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
 339                 buf[off++] |= 0x1; /* CODE SET == Binary */
 340                 buf[off] = 0x80; /* Set PIV=1 */
 341                 /* Set ASSOICATION == target port: 01b */
 342                 buf[off] |= 0x10;
 343                 /* DESIGNATOR TYPE == Target port group identifier */
 344                 buf[off++] |= 0x5;
 345                 off++; /* Skip over Reserved */
 346                 buf[off++] = 4; /* DESIGNATOR LENGTH */
 347                 off += 2; /* Skip over Reserved Field */
 348                 buf[off++] = ((tg_pt_gp_id >> 8) & 0xff);
 349                 buf[off++] = (tg_pt_gp_id & 0xff);
 350                 len += 8; /* Header size + Designation descriptor */
 351                 /*
 352                  * Logical Unit Group identifier, see spc4r17
 353                  * section 7.7.3.8
 354                  */
 355 check_lu_gp:
 356                 if (((len + 4) + 8) > cmd->data_length) {
 357                         len += 8;
 358                         goto check_scsi_name;
 359                 }
 360                 lu_gp_mem = dev->dev_alua_lu_gp_mem;
 361                 if (!lu_gp_mem)
 362                         goto check_scsi_name;
 363
 364                 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
 365                 lu_gp = lu_gp_mem->lu_gp;
 366                 if (!lu_gp) {
 367                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
 368                         goto check_scsi_name;
 369                 }
 370                 lu_gp_id = lu_gp->lu_gp_id;
 371                 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
 372
 373                 buf[off++] |= 0x1; /* CODE SET == Binary */
 374                 /* DESIGNATOR TYPE == Logical Unit Group identifier */
 375                 buf[off++] |= 0x6;
 376                 off++; /* Skip over Reserved */
 377                 buf[off++] = 4; /* DESIGNATOR LENGTH */
 378                 off += 2; /* Skip over Reserved Field */
 379                 buf[off++] = ((lu_gp_id >> 8) & 0xff);
 380                 buf[off++] = (lu_gp_id & 0xff);
 381                 len += 8; /* Header size + Designation descriptor */
 382                 /*
 383                  * SCSI name string designator, see spc4r17
 384                  * section 7.7.3.11
 385                  *
 386                  * Get the PROTOCOL IDENTIFIER as defined by spc4r17
 387                  * section 7.5.1 Table 362
 388                  */
 389 check_scsi_name:
 390                 scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg));
 391                 /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */
 392                 scsi_name_len += 10;
 393                 /* Check for 4-byte padding */
 394                 padding = ((-scsi_name_len) & 3);
 395                 if (padding != 0)
 396                         scsi_name_len += padding;
 397                 /* Header size + Designation descriptor */
 398                 scsi_name_len += 4;
 399
 400                 if (((len + 4) + scsi_name_len) > cmd->data_length) {
 401                         len += scsi_name_len;
 402                         goto set_len;
 403                 }
 404                 buf[off] =
 405                         (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
 406                 buf[off++] |= 0x3; /* CODE SET == UTF-8 */
 407                 buf[off] = 0x80; /* Set PIV=1 */
 408                 /* Set ASSOICATION == target port: 01b */
 409                 buf[off] |= 0x10;
 410                 /* DESIGNATOR TYPE == SCSI name string */
 411                 buf[off++] |= 0x8;
 412                 off += 2; /* Skip over Reserved and length */
 413                 /*
 414                  * SCSI name string identifer containing, $FABRIC_MOD
 415                  * dependent information.  For LIO-Target and iSCSI
 416                  * Target Port, this means "<iSCSI name>,t,0x<TPGT> in
 417                  * UTF-8 encoding.
 418                  */
 419                 tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg);
 420                 scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x",
 421                                         tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt);
 422                 scsi_name_len += 1 /* Include  NULL terminator */;
 423                 /*
 424                  * The null-terminated, null-padded (see 4.4.2) SCSI
 425                  * NAME STRING field contains a UTF-8 format string.
 426                  * The number of bytes in the SCSI NAME STRING field
 427                  * (i.e., the value in the DESIGNATOR LENGTH field)
 428                  * shall be no larger than 256 and shall be a multiple
 429                  * of four.
 430                  */
 431                 if (padding)
 432                         scsi_name_len += padding;
 433
 434                 buf[off-1] = scsi_name_len;
 435                 off += scsi_name_len;
 436                 /* Header size + Designation descriptor */
 437                 len += (scsi_name_len + 4);
 438         }
 439 set_len:
 440         buf[2] = ((len >> 8) & 0xff);
 441         buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */
 442         return 0;
 443 }
 444
 445 /* Extended INQUIRY Data VPD Page */
 446 static int
 447 target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf)
 448 {
 449         if (cmd->data_length < 60)
 450                 return 0;
 451
 452         buf[2] = 0x3c;
 453         /* Set HEADSUP, ORDSUP, SIMPSUP */
 454         buf[5] = 0x07;
 455
 456         /* If WriteCache emulation is enabled, set V_SUP */
 457         if (cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0)
 458                 buf[6] = 0x01;
 459         return 0;
 460 }
 461
 462 /* Block Limits VPD page */
 463 static int
 464 target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
 465 {
 466         struct se_device *dev = cmd->se_dev;
 467         int have_tp = 0;
 468
 469         /*
 470          * Following sbc3r22 section 6.5.3 Block Limits VPD page, when
 471          * emulate_tpu=1 or emulate_tpws=1 we will be expect a
 472          * different page length for Thin Provisioning.
 473          */
 474         if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws)
 475                 have_tp = 1;
 476
 477         if (cmd->data_length < (0x10 + 4)) {
 478                 pr_debug("Received data_length: %u"
 479                         " too small for EVPD 0xb0\n",
 480                         cmd->data_length);
 481                 return -EINVAL;
 482         }
 483
 484         if (have_tp && cmd->data_length < (0x3c + 4)) {
 485                 pr_debug("Received data_length: %u"
 486                         " too small for TPE=1 EVPD 0xb0\n",
 487                         cmd->data_length);
 488                 have_tp = 0;
 489         }
 490
 491         buf[0] = dev->transport->get_device_type(dev);
 492         buf[3] = have_tp ? 0x3c : 0x10;
 493
 494         /* Set WSNZ to 1 */
 495         buf[4] = 0x01;
 496
 497         /*
 498          * Set OPTIMAL TRANSFER LENGTH GRANULARITY
 499          */
 500         put_unaligned_be16(1, &buf[6]);
 501
 502         /*
 503          * Set MAXIMUM TRANSFER LENGTH
 504          */
 505         put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_sectors, &buf[8]);
 506
 507         /*
 508          * Set OPTIMAL TRANSFER LENGTH
 509          */
 510         put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.optimal_sectors, &buf[12]);
 511
 512         /*
 513          * Exit now if we don't support TP or the initiator sent a too
 514          * short buffer.
 515          */
 516         if (!have_tp || cmd->data_length < (0x3c + 4))
 517                 return 0;
 518
 519         /*
 520          * Set MAXIMUM UNMAP LBA COUNT
 521          */
 522         put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count, &buf[20]);
 523
 524         /*
 525          * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT
 526          */
 527         put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count,
 528                            &buf[24]);
 529
 530         /*
 531          * Set OPTIMAL UNMAP GRANULARITY
 532          */
 533         put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity, &buf[28]);
 534
 535         /*
 536          * UNMAP GRANULARITY ALIGNMENT
 537          */
 538         put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment,
 539                            &buf[32]);
 540         if (dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment != 0)
 541                 buf[32] |= 0x80; /* Set the UGAVALID bit */
 542
 543         return 0;
 544 }
 545
 546 /* Block Device Characteristics VPD page */
 547 static int
 548 target_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf)
 549 {
 550         struct se_device *dev = cmd->se_dev;
 551
 552         buf[0] = dev->transport->get_device_type(dev);
 553         buf[3] = 0x3c;
 554
 555         if (cmd->data_length >= 5 &&
 556             dev->se_sub_dev->se_dev_attrib.is_nonrot)
 557                 buf[5] = 1;
 558
 559         return 0;
 560 }
 561
 562 /* Thin Provisioning VPD */
 563 static int
 564 target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf)
 565 {
 566         struct se_device *dev = cmd->se_dev;
 567
 568         /*
 569          * From sbc3r22 section 6.5.4 Thin Provisioning VPD page:
 570          *
 571          * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to
 572          * zero, then the page length shall be set to 0004h.  If the DP bit
 573          * is set to one, then the page length shall be set to the value
 574          * defined in table 162.
 575          */
 576         buf[0] = dev->transport->get_device_type(dev);
 577
 578         /*
 579          * Set Hardcoded length mentioned above for DP=0
 580          */
 581         put_unaligned_be16(0x0004, &buf[2]);
 582
 583         /*
 584          * The THRESHOLD EXPONENT field indicates the threshold set size in
 585          * LBAs as a power of 2 (i.e., the threshold set size is equal to
 586          * 2(threshold exponent)).
 587          *
 588          * Note that this is currently set to 0x00 as mkp says it will be
 589          * changing again.  We can enable this once it has settled in T10
 590          * and is actually used by Linux/SCSI ML code.
 591          */
 592         buf[4] = 0x00;
 593
 594         /*
 595          * A TPU bit set to one indicates that the device server supports
 596          * the UNMAP command (see 5.25). A TPU bit set to zero indicates
 597          * that the device server does not support the UNMAP command.
 598          */
 599         if (dev->se_sub_dev->se_dev_attrib.emulate_tpu != 0)
 600                 buf[5] = 0x80;
 601
 602         /*
 603          * A TPWS bit set to one indicates that the device server supports
 604          * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs.
 605          * A TPWS bit set to zero indicates that the device server does not
 606          * support the use of the WRITE SAME (16) command to unmap LBAs.
 607          */
 608         if (dev->se_sub_dev->se_dev_attrib.emulate_tpws != 0)
 609                 buf[5] |= 0x40;
 610
 611         return 0;
 612 }
 613
 614 static int
 615 target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf);
 616
 617 static struct {
 618         uint8_t         page;
 619         int             (*emulate)(struct se_cmd *, unsigned char *);
 620 } evpd_handlers[] = {
 621         { .page = 0x00, .emulate = target_emulate_evpd_00 },
 622         { .page = 0x80, .emulate = target_emulate_evpd_80 },
 623         { .page = 0x83, .emulate = target_emulate_evpd_83 },
 624         { .page = 0x86, .emulate = target_emulate_evpd_86 },
 625         { .page = 0xb0, .emulate = target_emulate_evpd_b0 },
 626         { .page = 0xb1, .emulate = target_emulate_evpd_b1 },
 627         { .page = 0xb2, .emulate = target_emulate_evpd_b2 },
 628 };
 629
 630 /* supported vital product data pages */
 631 static int
 632 target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf)
 633 {
 634         int p;
 635
 636         if (cmd->data_length < 8)
 637                 return 0;
 638         /*
 639          * Only report the INQUIRY EVPD=1 pages after a valid NAA
 640          * Registered Extended LUN WWN has been set via ConfigFS
 641          * during device creation/restart.
 642          */
 643         if (cmd->se_dev->se_sub_dev->su_dev_flags &
 644                         SDF_EMULATED_VPD_UNIT_SERIAL) {
 645                 buf[3] = ARRAY_SIZE(evpd_handlers);
 646                 for (p = 0; p < min_t(int, ARRAY_SIZE(evpd_handlers),
 647                                       cmd->data_length - 4); ++p)
 648                         buf[p + 4] = evpd_handlers[p].page;
 649         }
 650
 651         return 0;
 652 }
 653
 654 static int
 655 target_emulate_inquiry(struct se_cmd *cmd)
 656 {
 657         struct se_device *dev = cmd->se_dev;
 658         unsigned char *buf;
 659         unsigned char *cdb = cmd->t_task_cdb;
 660         int p, ret;
 661
 662         if (!(cdb[1] & 0x1))
 663                 return target_emulate_inquiry_std(cmd);
 664
 665         /*
 666          * Make sure we at least have 4 bytes of INQUIRY response
 667          * payload for 0x00 going back for EVPD=1.  Note that 0x80
 668          * and 0x83 will check for enough payload data length and
 669          * jump to set_len: label when there is not enough inquiry EVPD
 670          * payload length left for the next outgoing EVPD metadata
 671          */
 672         if (cmd->data_length < 4) {
 673                 pr_err("SCSI Inquiry payload length: %u"
 674                         " too small for EVPD=1\n", cmd->data_length);
 675                 return -EINVAL;
 676         }
 677
 678         buf = transport_kmap_first_data_page(cmd);
 679
 680         buf[0] = dev->transport->get_device_type(dev);
 681
 682         for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p)
 683                 if (cdb[2] == evpd_handlers[p].page) {
 684                         buf[1] = cdb[2];
 685                         ret = evpd_handlers[p].emulate(cmd, buf);
 686                         transport_kunmap_first_data_page(cmd);
 687                         return ret;
 688                 }
 689
 690         transport_kunmap_first_data_page(cmd);
 691         pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]);
 692         return -EINVAL;
 693 }
 694
 695 static int
 696 target_emulate_readcapacity(struct se_cmd *cmd)
 697 {
 698         struct se_device *dev = cmd->se_dev;
 699         unsigned char *buf;
 700         unsigned long long blocks_long = dev->transport->get_blocks(dev);
 701         u32 blocks;
 702
 703         if (blocks_long >= 0x00000000ffffffff)
 704                 blocks = 0xffffffff;
 705         else
 706                 blocks = (u32)blocks_long;
 707
 708         buf = transport_kmap_first_data_page(cmd);
 709
 710         buf[0] = (blocks >> 24) & 0xff;
 711         buf[1] = (blocks >> 16) & 0xff;
 712         buf[2] = (blocks >> 8) & 0xff;
 713         buf[3] = blocks & 0xff;
 714         buf[4] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff;
 715         buf[5] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff;
 716         buf[6] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff;
 717         buf[7] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff;
 718         /*
 719          * Set max 32-bit blocks to signal SERVICE ACTION READ_CAPACITY_16
 720         */
 721         if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws)
 722                 put_unaligned_be32(0xFFFFFFFF, &buf[0]);
 723
 724         transport_kunmap_first_data_page(cmd);
 725
 726         return 0;
 727 }
 728
 729 static int
 730 target_emulate_readcapacity_16(struct se_cmd *cmd)
 731 {
 732         struct se_device *dev = cmd->se_dev;
 733         unsigned char *buf;
 734         unsigned long long blocks = dev->transport->get_blocks(dev);
 735
 736         buf = transport_kmap_first_data_page(cmd);
 737
 738         buf[0] = (blocks >> 56) & 0xff;
 739         buf[1] = (blocks >> 48) & 0xff;
 740         buf[2] = (blocks >> 40) & 0xff;
 741         buf[3] = (blocks >> 32) & 0xff;
 742         buf[4] = (blocks >> 24) & 0xff;
 743         buf[5] = (blocks >> 16) & 0xff;
 744         buf[6] = (blocks >> 8) & 0xff;
 745         buf[7] = blocks & 0xff;
 746         buf[8] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff;
 747         buf[9] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff;
 748         buf[10] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff;
 749         buf[11] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff;
 750         /*
 751          * Set Thin Provisioning Enable bit following sbc3r22 in section
 752          * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled.
 753          */
 754         if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws)
 755                 buf[14] = 0x80;
 756
 757         transport_kunmap_first_data_page(cmd);
 758
 759         return 0;
 760 }
 761
 762 static int
 763 target_modesense_rwrecovery(unsigned char *p)
 764 {
 765         p[0] = 0x01;
 766         p[1] = 0x0a;
 767
 768         return 12;
 769 }
 770
 771 static int
 772 target_modesense_control(struct se_device *dev, unsigned char *p)
 773 {
 774         p[0] = 0x0a;
 775         p[1] = 0x0a;
 776         p[2] = 2;
 777         /*
 778          * From spc4r17, section 7.4.6 Control mode Page
 779          *
 780          * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b
 781          *
 782          * 00b: The logical unit shall clear any unit attention condition
 783          * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
 784          * status and shall not establish a unit attention condition when a com-
 785          * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT
 786          * status.
 787          *
 788          * 10b: The logical unit shall not clear any unit attention condition
 789          * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
 790          * status and shall not establish a unit attention condition when
 791          * a command is completed with BUSY, TASK SET FULL, or RESERVATION
 792          * CONFLICT status.
 793          *
 794          * 11b a The logical unit shall not clear any unit attention condition
 795          * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
 796          * status and shall establish a unit attention condition for the
 797          * initiator port associated with the I_T nexus on which the BUSY,
 798          * TASK SET FULL, or RESERVATION CONFLICT status is being returned.
 799          * Depending on the status, the additional sense code shall be set to
 800          * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS
 801          * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE
 802          * command, a unit attention condition shall be established only once
 803          * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless
 804          * to the number of commands completed with one of those status codes.
 805          */
 806         p[4] = (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 :
 807                (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00;
 808         /*
 809          * From spc4r17, section 7.4.6 Control mode Page
 810          *
 811          * Task Aborted Status (TAS) bit set to zero.
 812          *
 813          * A task aborted status (TAS) bit set to zero specifies that aborted
 814          * tasks shall be terminated by the device server without any response
 815          * to the application client. A TAS bit set to one specifies that tasks
 816          * aborted by the actions of an I_T nexus other than the I_T nexus on
 817          * which the command was received shall be completed with TASK ABORTED
 818          * status (see SAM-4).
 819          */
 820         p[5] = (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? 0x40 : 0x00;
 821         p[8] = 0xff;
 822         p[9] = 0xff;
 823         p[11] = 30;
 824
 825         return 12;
 826 }
 827
 828 static int
 829 target_modesense_caching(struct se_device *dev, unsigned char *p)
 830 {
 831         p[0] = 0x08;
 832         p[1] = 0x12;
 833         if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0)
 834                 p[2] = 0x04; /* Write Cache Enable */
 835         p[12] = 0x20; /* Disabled Read Ahead */
 836
 837         return 20;
 838 }
 839
 840 static void
 841 target_modesense_write_protect(unsigned char *buf, int type)
 842 {
 843         /*
 844          * I believe that the WP bit (bit 7) in the mode header is the same for
 845          * all device types..
 846          */
 847         switch (type) {
 848         case TYPE_DISK:
 849         case TYPE_TAPE:
 850         default:
 851                 buf[0] |= 0x80; /* WP bit */
 852                 break;
 853         }
 854 }
 855
 856 static void
 857 target_modesense_dpofua(unsigned char *buf, int type)
 858 {
 859         switch (type) {
 860         case TYPE_DISK:
 861                 buf[0] |= 0x10; /* DPOFUA bit */
 862                 break;
 863         default:
 864                 break;
 865         }
 866 }
 867
 868 static int
 869 target_emulate_modesense(struct se_cmd *cmd, int ten)
 870 {
 871         struct se_device *dev = cmd->se_dev;
 872         char *cdb = cmd->t_task_cdb;
 873         unsigned char *rbuf;
 874         int type = dev->transport->get_device_type(dev);
 875         int offset = (ten) ? 8 : 4;
 876         int length = 0;
 877         unsigned char buf[SE_MODE_PAGE_BUF];
 878
 879         memset(buf, 0, SE_MODE_PAGE_BUF);
 880
 881         switch (cdb[2] & 0x3f) {
 882         case 0x01:
 883                 length = target_modesense_rwrecovery(&buf[offset]);
 884                 break;
 885         case 0x08:
 886                 length = target_modesense_caching(dev, &buf[offset]);
 887                 break;
 888         case 0x0a:
 889                 length = target_modesense_control(dev, &buf[offset]);
 890                 break;
 891         case 0x3f:
 892                 length = target_modesense_rwrecovery(&buf[offset]);
 893                 length += target_modesense_caching(dev, &buf[offset+length]);
 894                 length += target_modesense_control(dev, &buf[offset+length]);
 895                 break;
 896         default:
 897                 pr_err("Got Unknown Mode Page: 0x%02x\n",
 898                                 cdb[2] & 0x3f);
 899                 return PYX_TRANSPORT_UNKNOWN_MODE_PAGE;
 900         }
 901         offset += length;
 902
 903         if (ten) {
 904                 offset -= 2;
 905                 buf[0] = (offset >> 8) & 0xff;
 906                 buf[1] = offset & 0xff;
 907
 908                 if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) ||
 909                     (cmd->se_deve &&
 910                     (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
 911                         target_modesense_write_protect(&buf[3], type);
 912
 913                 if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) &&
 914                     (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0))
 915                         target_modesense_dpofua(&buf[3], type);
 916
 917                 if ((offset + 2) > cmd->data_length)
 918                         offset = cmd->data_length;
 919
 920         } else {
 921                 offset -= 1;
 922                 buf[0] = offset & 0xff;
 923
 924                 if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) ||
 925                     (cmd->se_deve &&
 926                     (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
 927                         target_modesense_write_protect(&buf[2], type);
 928
 929                 if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) &&
 930                     (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0))
 931                         target_modesense_dpofua(&buf[2], type);
 932
 933                 if ((offset + 1) > cmd->data_length)
 934                         offset = cmd->data_length;
 935         }
 936
 937         rbuf = transport_kmap_first_data_page(cmd);
 938         memcpy(rbuf, buf, offset);
 939         transport_kunmap_first_data_page(cmd);
 940
 941         return 0;
 942 }
 943
 944 static int
 945 target_emulate_request_sense(struct se_cmd *cmd)
 946 {
 947         unsigned char *cdb = cmd->t_task_cdb;
 948         unsigned char *buf;
 949         u8 ua_asc = 0, ua_ascq = 0;
 950         int err = 0;
 951
 952         if (cdb[1] & 0x01) {
 953                 pr_err("REQUEST_SENSE description emulation not"
 954                         " supported\n");
 955                 return PYX_TRANSPORT_INVALID_CDB_FIELD;
 956         }
 957
 958         buf = transport_kmap_first_data_page(cmd);
 959
 960         if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) {
 961                 /*
 962                  * CURRENT ERROR, UNIT ATTENTION
 963                  */
 964                 buf[0] = 0x70;
 965                 buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION;
 966                 /*
 967                  * Make sure request data length is enough for additional
 968                  * sense data.
 969                  */
 970                 if (cmd->data_length <= 18) {
 971                         buf[7] = 0x00;
 972                         err = -EINVAL;
 973                         goto end;
 974                 }
 975                 /*
 976                  * The Additional Sense Code (ASC) from the UNIT ATTENTION
 977                  */
 978                 buf[SPC_ASC_KEY_OFFSET] = ua_asc;
 979                 buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq;
 980                 buf[7] = 0x0A;
 981         } else {
 982                 /*
 983                  * CURRENT ERROR, NO SENSE
 984                  */
 985                 buf[0] = 0x70;
 986                 buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE;
 987                 /*
 988                  * Make sure request data length is enough for additional
 989                  * sense data.
 990                  */
 991                 if (cmd->data_length <= 18) {
 992                         buf[7] = 0x00;
 993                         err = -EINVAL;
 994                         goto end;
 995                 }
 996                 /*
 997                  * NO ADDITIONAL SENSE INFORMATION
 998                  */
 999                 buf[SPC_ASC_KEY_OFFSET] = 0x00;
1000                 buf[7] = 0x0A;
1001         }
1002
1003 end:
1004         transport_kunmap_first_data_page(cmd);
1005
1006         return 0;
1007 }
1008
1009 /*
1010  * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
1011  * Note this is not used for TCM/pSCSI passthrough
1012  */
1013 static int
1014 target_emulate_unmap(struct se_task *task)
1015 {
1016         struct se_cmd *cmd = task->task_se_cmd;
1017         struct se_device *dev = cmd->se_dev;
1018         unsigned char *buf, *ptr = NULL;
1019         unsigned char *cdb = &cmd->t_task_cdb[0];
1020         sector_t lba;
1021         unsigned int size = cmd->data_length, range;
1022         int ret = 0, offset;
1023         unsigned short dl, bd_dl;
1024
1025         /* First UNMAP block descriptor starts at 8 byte offset */
1026         offset = 8;
1027         size -= 8;
1028         dl = get_unaligned_be16(&cdb[0]);
1029         bd_dl = get_unaligned_be16(&cdb[2]);
1030
1031         buf = transport_kmap_first_data_page(cmd);
1032
1033         ptr = &buf[offset];
1034         pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu"
1035                 " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr);
1036
1037         while (size) {
1038                 lba = get_unaligned_be64(&ptr[0]);
1039                 range = get_unaligned_be32(&ptr[8]);
1040                 pr_debug("UNMAP: Using lba: %llu and range: %u\n",
1041                                  (unsigned long long)lba, range);
1042
1043                 ret = dev->transport->do_discard(dev, lba, range);
1044                 if (ret < 0) {
1045                         pr_err("blkdev_issue_discard() failed: %d\n",
1046                                         ret);
1047                         goto err;
1048                 }
1049
1050                 ptr += 16;
1051                 size -= 16;
1052         }
1053
1054         task->task_scsi_status = GOOD;
1055         transport_complete_task(task, 1);
1056 err:
1057         transport_kunmap_first_data_page(cmd);
1058
1059         return ret;
1060 }
1061
1062 /*
1063  * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
1064  * Note this is not used for TCM/pSCSI passthrough
1065  */
1066 static int
1067 target_emulate_write_same(struct se_task *task, int write_same32)
1068 {
1069         struct se_cmd *cmd = task->task_se_cmd;
1070         struct se_device *dev = cmd->se_dev;
1071         sector_t range;
1072         sector_t lba = cmd->t_task_lba;
1073         unsigned int num_blocks;
1074         int ret;
1075         /*
1076          * Extract num_blocks from the WRITE_SAME_* CDB.  Then use the explict
1077          * range when non zero is supplied, otherwise calculate the remaining
1078          * range based on ->get_blocks() - starting LBA.
1079          */
1080         if (write_same32)
1081                 num_blocks = get_unaligned_be32(&cmd->t_task_cdb[28]);
1082         else
1083                 num_blocks = get_unaligned_be32(&cmd->t_task_cdb[10]);
1084
1085         if (num_blocks != 0)
1086                 range = num_blocks;
1087         else
1088                 range = (dev->transport->get_blocks(dev) - lba);
1089
1090         pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n",
1091                  (unsigned long long)lba, (unsigned long long)range);
1092
1093         ret = dev->transport->do_discard(dev, lba, range);
1094         if (ret < 0) {
1095                 pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n");
1096                 return ret;
1097         }
1098
1099         task->task_scsi_status = GOOD;
1100         transport_complete_task(task, 1);
1101         return 0;
1102 }
1103
1104 int
1105 transport_emulate_control_cdb(struct se_task *task)
1106 {
1107         struct se_cmd *cmd = task->task_se_cmd;
1108         struct se_device *dev = cmd->se_dev;
1109         unsigned short service_action;
1110         int ret = 0;
1111
1112         switch (cmd->t_task_cdb[0]) {
1113         case INQUIRY:
1114                 ret = target_emulate_inquiry(cmd);
1115                 break;
1116         case READ_CAPACITY:
1117                 ret = target_emulate_readcapacity(cmd);
1118                 break;
1119         case MODE_SENSE:
1120                 ret = target_emulate_modesense(cmd, 0);
1121                 break;
1122         case MODE_SENSE_10:
1123                 ret = target_emulate_modesense(cmd, 1);
1124                 break;
1125         case SERVICE_ACTION_IN:
1126                 switch (cmd->t_task_cdb[1] & 0x1f) {
1127                 case SAI_READ_CAPACITY_16:
1128                         ret = target_emulate_readcapacity_16(cmd);
1129                         break;
1130                 default:
1131                         pr_err("Unsupported SA: 0x%02x\n",
1132                                 cmd->t_task_cdb[1] & 0x1f);
1133                         return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
1134                 }
1135                 break;
1136         case REQUEST_SENSE:
1137                 ret = target_emulate_request_sense(cmd);
1138                 break;
1139         case UNMAP:
1140                 if (!dev->transport->do_discard) {
1141                         pr_err("UNMAP emulation not supported for: %s\n",
1142                                         dev->transport->name);
1143                         return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
1144                 }
1145                 ret = target_emulate_unmap(task);
1146                 break;
1147         case WRITE_SAME_16:
1148                 if (!dev->transport->do_discard) {
1149                         pr_err("WRITE_SAME_16 emulation not supported"
1150                                         " for: %s\n", dev->transport->name);
1151                         return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
1152                 }
1153                 ret = target_emulate_write_same(task, 0);
1154                 break;
1155         case VARIABLE_LENGTH_CMD:
1156                 service_action =
1157                         get_unaligned_be16(&cmd->t_task_cdb[8]);
1158                 switch (service_action) {
1159                 case WRITE_SAME_32:
1160                         if (!dev->transport->do_discard) {
1161                                 pr_err("WRITE_SAME_32 SA emulation not"
1162                                         " supported for: %s\n",
1163                                         dev->transport->name);
1164                                 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
1165                         }
1166                         ret = target_emulate_write_same(task, 1);
1167                         break;
1168                 default:
1169                         pr_err("Unsupported VARIABLE_LENGTH_CMD SA:"
1170                                         " 0x%02x\n", service_action);
1171                         break;
1172                 }
1173                 break;
1174         case SYNCHRONIZE_CACHE:
1175         case 0x91: /* SYNCHRONIZE_CACHE_16: */
1176                 if (!dev->transport->do_sync_cache) {
1177                         pr_err("SYNCHRONIZE_CACHE emulation not supported"
1178                                 " for: %s\n", dev->transport->name);
1179                         return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
1180                 }
1181                 dev->transport->do_sync_cache(task);
1182                 break;
1183         case ALLOW_MEDIUM_REMOVAL:
1184         case ERASE:
1185         case REZERO_UNIT:
1186         case SEEK_10:
1187         case SPACE:
1188         case START_STOP:
1189         case TEST_UNIT_READY:
1190         case VERIFY:
1191         case WRITE_FILEMARKS:
1192                 break;
1193         default:
1194                 pr_err("Unsupported SCSI Opcode: 0x%02x for %s\n",
1195                         cmd->t_task_cdb[0], dev->transport->name);
1196                 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
1197         }
1198
1199         if (ret < 0)
1200                 return ret;
1201         task->task_scsi_status = GOOD;
1202         transport_complete_task(task, 1);
1203
1204         return PYX_TRANSPORT_SENT_TO_TRANSPORT;
1205 }