1 /* 2 * SCSI Primary Commands (SPC) parsing and emulation. 3 * 4 * (c) Copyright 2002-2013 Datera, Inc. 5 * 6 * Nicholas A. Bellinger <nab@kernel.org> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 21 */ 22 23 #include <linux/kernel.h> 24 #include <linux/module.h> 25 #include <asm/unaligned.h> 26 27 #include <scsi/scsi.h> 28 #include <scsi/scsi_tcq.h> 29 30 #include <target/target_core_base.h> 31 #include <target/target_core_backend.h> 32 #include <target/target_core_fabric.h> 33 34 #include "target_core_internal.h" 35 #include "target_core_alua.h" 36 #include "target_core_pr.h" 37 #include "target_core_ua.h" 38 #include "target_core_xcopy.h" 39 40 static void spc_fill_alua_data(struct se_port *port, unsigned char *buf) 41 { 42 struct t10_alua_tg_pt_gp *tg_pt_gp; 43 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; 44 45 /* 46 * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS. 47 */ 48 buf[5] = 0x80; 49 50 /* 51 * Set TPGS field for explict and/or implict ALUA access type 52 * and opteration. 53 * 54 * See spc4r17 section 6.4.2 Table 135 55 */ 56 if (!port) 57 return; 58 tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; 59 if (!tg_pt_gp_mem) 60 return; 61 62 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 63 tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; 64 if (tg_pt_gp) 65 buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; 66 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 67 } 68 69 sense_reason_t 70 spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char *buf) 71 { 72 struct se_lun *lun = cmd->se_lun; 73 struct se_device *dev = cmd->se_dev; 74 75 /* Set RMB (removable media) for tape devices */ 76 if (dev->transport->get_device_type(dev) == TYPE_TAPE) 77 buf[1] = 0x80; 78 79 buf[2] = 0x05; /* SPC-3 */ 80 81 /* 82 * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2 83 * 84 * SPC4 says: 85 * A RESPONSE DATA FORMAT field set to 2h indicates that the 86 * standard INQUIRY data is in the format defined in this 87 * standard. Response data format values less than 2h are 88 * obsolete. Response data format values greater than 2h are 89 * reserved. 90 */ 91 buf[3] = 2; 92 93 /* 94 * Enable SCCS and TPGS fields for Emulated ALUA 95 */ 96 spc_fill_alua_data(lun->lun_sep, buf); 97 98 /* 99 * Set Third-Party Copy (3PC) bit to indicate support for EXTENDED_COPY 100 */ 101 if (dev->dev_attrib.emulate_3pc) 102 buf[5] |= 0x8; 103 104 buf[7] = 0x2; /* CmdQue=1 */ 105 106 memcpy(&buf[8], "LIO-ORG ", 8); 107 memset(&buf[16], 0x20, 16); 108 memcpy(&buf[16], dev->t10_wwn.model, 109 min_t(size_t, strlen(dev->t10_wwn.model), 16)); 110 memcpy(&buf[32], dev->t10_wwn.revision, 111 min_t(size_t, strlen(dev->t10_wwn.revision), 4)); 112 buf[4] = 31; /* Set additional length to 31 */ 113 114 return 0; 115 } 116 EXPORT_SYMBOL(spc_emulate_inquiry_std); 117 118 /* unit serial number */ 119 static sense_reason_t 120 spc_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) 121 { 122 struct se_device *dev = cmd->se_dev; 123 u16 len = 0; 124 125 if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { 126 u32 unit_serial_len; 127 128 unit_serial_len = strlen(dev->t10_wwn.unit_serial); 129 unit_serial_len++; /* For NULL Terminator */ 130 131 len += sprintf(&buf[4], "%s", dev->t10_wwn.unit_serial); 132 len++; /* Extra Byte for NULL Terminator */ 133 buf[3] = len; 134 } 135 return 0; 136 } 137 138 void spc_parse_naa_6h_vendor_specific(struct se_device *dev, 139 unsigned char *buf) 140 { 141 unsigned char *p = &dev->t10_wwn.unit_serial[0]; 142 int cnt; 143 bool next = true; 144 145 /* 146 * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on 147 * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field 148 * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION 149 * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL 150 * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure 151 * per device uniqeness. 152 */ 153 for (cnt = 0; *p && cnt < 13; p++) { 154 int val = hex_to_bin(*p); 155 156 if (val < 0) 157 continue; 158 159 if (next) { 160 next = false; 161 buf[cnt++] |= val; 162 } else { 163 next = true; 164 buf[cnt] = val << 4; 165 } 166 } 167 } 168 169 /* 170 * Device identification VPD, for a complete list of 171 * DESIGNATOR TYPEs see spc4r17 Table 459. 172 */ 173 sense_reason_t 174 spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) 175 { 176 struct se_device *dev = cmd->se_dev; 177 struct se_lun *lun = cmd->se_lun; 178 struct se_port *port = NULL; 179 struct se_portal_group *tpg = NULL; 180 struct t10_alua_lu_gp_member *lu_gp_mem; 181 struct t10_alua_tg_pt_gp *tg_pt_gp; 182 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; 183 unsigned char *prod = &dev->t10_wwn.model[0]; 184 u32 prod_len; 185 u32 unit_serial_len, off = 0; 186 u16 len = 0, id_len; 187 188 off = 4; 189 190 /* 191 * NAA IEEE Registered Extended Assigned designator format, see 192 * spc4r17 section 7.7.3.6.5 193 * 194 * We depend upon a target_core_mod/ConfigFS provided 195 * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial 196 * value in order to return the NAA id. 197 */ 198 if (!(dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL)) 199 goto check_t10_vend_desc; 200 201 /* CODE SET == Binary */ 202 buf[off++] = 0x1; 203 204 /* Set ASSOCIATION == addressed logical unit: 0)b */ 205 buf[off] = 0x00; 206 207 /* Identifier/Designator type == NAA identifier */ 208 buf[off++] |= 0x3; 209 off++; 210 211 /* Identifier/Designator length */ 212 buf[off++] = 0x10; 213 214 /* 215 * Start NAA IEEE Registered Extended Identifier/Designator 216 */ 217 buf[off++] = (0x6 << 4); 218 219 /* 220 * Use OpenFabrics IEEE Company ID: 00 14 05 221 */ 222 buf[off++] = 0x01; 223 buf[off++] = 0x40; 224 buf[off] = (0x5 << 4); 225 226 /* 227 * Return ConfigFS Unit Serial Number information for 228 * VENDOR_SPECIFIC_IDENTIFIER and 229 * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION 230 */ 231 spc_parse_naa_6h_vendor_specific(dev, &buf[off]); 232 233 len = 20; 234 off = (len + 4); 235 236 check_t10_vend_desc: 237 /* 238 * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 239 */ 240 id_len = 8; /* For Vendor field */ 241 prod_len = 4; /* For VPD Header */ 242 prod_len += 8; /* For Vendor field */ 243 prod_len += strlen(prod); 244 prod_len++; /* For : */ 245 246 if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { 247 unit_serial_len = strlen(&dev->t10_wwn.unit_serial[0]); 248 unit_serial_len++; /* For NULL Terminator */ 249 250 id_len += sprintf(&buf[off+12], "%s:%s", prod, 251 &dev->t10_wwn.unit_serial[0]); 252 } 253 buf[off] = 0x2; /* ASCII */ 254 buf[off+1] = 0x1; /* T10 Vendor ID */ 255 buf[off+2] = 0x0; 256 memcpy(&buf[off+4], "LIO-ORG", 8); 257 /* Extra Byte for NULL Terminator */ 258 id_len++; 259 /* Identifier Length */ 260 buf[off+3] = id_len; 261 /* Header size for Designation descriptor */ 262 len += (id_len + 4); 263 off += (id_len + 4); 264 /* 265 * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD 266 */ 267 port = lun->lun_sep; 268 if (port) { 269 struct t10_alua_lu_gp *lu_gp; 270 u32 padding, scsi_name_len; 271 u16 lu_gp_id = 0; 272 u16 tg_pt_gp_id = 0; 273 u16 tpgt; 274 275 tpg = port->sep_tpg; 276 /* 277 * Relative target port identifer, see spc4r17 278 * section 7.7.3.7 279 * 280 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 281 * section 7.5.1 Table 362 282 */ 283 buf[off] = 284 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); 285 buf[off++] |= 0x1; /* CODE SET == Binary */ 286 buf[off] = 0x80; /* Set PIV=1 */ 287 /* Set ASSOCIATION == target port: 01b */ 288 buf[off] |= 0x10; 289 /* DESIGNATOR TYPE == Relative target port identifer */ 290 buf[off++] |= 0x4; 291 off++; /* Skip over Reserved */ 292 buf[off++] = 4; /* DESIGNATOR LENGTH */ 293 /* Skip over Obsolete field in RTPI payload 294 * in Table 472 */ 295 off += 2; 296 buf[off++] = ((port->sep_rtpi >> 8) & 0xff); 297 buf[off++] = (port->sep_rtpi & 0xff); 298 len += 8; /* Header size + Designation descriptor */ 299 /* 300 * Target port group identifier, see spc4r17 301 * section 7.7.3.8 302 * 303 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 304 * section 7.5.1 Table 362 305 */ 306 tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; 307 if (!tg_pt_gp_mem) 308 goto check_lu_gp; 309 310 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 311 tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; 312 if (!tg_pt_gp) { 313 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 314 goto check_lu_gp; 315 } 316 tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; 317 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 318 319 buf[off] = 320 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); 321 buf[off++] |= 0x1; /* CODE SET == Binary */ 322 buf[off] = 0x80; /* Set PIV=1 */ 323 /* Set ASSOCIATION == target port: 01b */ 324 buf[off] |= 0x10; 325 /* DESIGNATOR TYPE == Target port group identifier */ 326 buf[off++] |= 0x5; 327 off++; /* Skip over Reserved */ 328 buf[off++] = 4; /* DESIGNATOR LENGTH */ 329 off += 2; /* Skip over Reserved Field */ 330 buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); 331 buf[off++] = (tg_pt_gp_id & 0xff); 332 len += 8; /* Header size + Designation descriptor */ 333 /* 334 * Logical Unit Group identifier, see spc4r17 335 * section 7.7.3.8 336 */ 337 check_lu_gp: 338 lu_gp_mem = dev->dev_alua_lu_gp_mem; 339 if (!lu_gp_mem) 340 goto check_scsi_name; 341 342 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 343 lu_gp = lu_gp_mem->lu_gp; 344 if (!lu_gp) { 345 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 346 goto check_scsi_name; 347 } 348 lu_gp_id = lu_gp->lu_gp_id; 349 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 350 351 buf[off++] |= 0x1; /* CODE SET == Binary */ 352 /* DESIGNATOR TYPE == Logical Unit Group identifier */ 353 buf[off++] |= 0x6; 354 off++; /* Skip over Reserved */ 355 buf[off++] = 4; /* DESIGNATOR LENGTH */ 356 off += 2; /* Skip over Reserved Field */ 357 buf[off++] = ((lu_gp_id >> 8) & 0xff); 358 buf[off++] = (lu_gp_id & 0xff); 359 len += 8; /* Header size + Designation descriptor */ 360 /* 361 * SCSI name string designator, see spc4r17 362 * section 7.7.3.11 363 * 364 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 365 * section 7.5.1 Table 362 366 */ 367 check_scsi_name: 368 scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg)); 369 /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */ 370 scsi_name_len += 10; 371 /* Check for 4-byte padding */ 372 padding = ((-scsi_name_len) & 3); 373 if (padding != 0) 374 scsi_name_len += padding; 375 /* Header size + Designation descriptor */ 376 scsi_name_len += 4; 377 378 buf[off] = 379 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); 380 buf[off++] |= 0x3; /* CODE SET == UTF-8 */ 381 buf[off] = 0x80; /* Set PIV=1 */ 382 /* Set ASSOCIATION == target port: 01b */ 383 buf[off] |= 0x10; 384 /* DESIGNATOR TYPE == SCSI name string */ 385 buf[off++] |= 0x8; 386 off += 2; /* Skip over Reserved and length */ 387 /* 388 * SCSI name string identifer containing, $FABRIC_MOD 389 * dependent information. For LIO-Target and iSCSI 390 * Target Port, this means "<iSCSI name>,t,0x<TPGT> in 391 * UTF-8 encoding. 392 */ 393 tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); 394 scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", 395 tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); 396 scsi_name_len += 1 /* Include NULL terminator */; 397 /* 398 * The null-terminated, null-padded (see 4.4.2) SCSI 399 * NAME STRING field contains a UTF-8 format string. 400 * The number of bytes in the SCSI NAME STRING field 401 * (i.e., the value in the DESIGNATOR LENGTH field) 402 * shall be no larger than 256 and shall be a multiple 403 * of four. 404 */ 405 if (padding) 406 scsi_name_len += padding; 407 408 buf[off-1] = scsi_name_len; 409 off += scsi_name_len; 410 /* Header size + Designation descriptor */ 411 len += (scsi_name_len + 4); 412 } 413 buf[2] = ((len >> 8) & 0xff); 414 buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ 415 return 0; 416 } 417 EXPORT_SYMBOL(spc_emulate_evpd_83); 418 419 static bool 420 spc_check_dev_wce(struct se_device *dev) 421 { 422 bool wce = false; 423 424 if (dev->transport->get_write_cache) 425 wce = dev->transport->get_write_cache(dev); 426 else if (dev->dev_attrib.emulate_write_cache > 0) 427 wce = true; 428 429 return wce; 430 } 431 432 /* Extended INQUIRY Data VPD Page */ 433 static sense_reason_t 434 spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) 435 { 436 struct se_device *dev = cmd->se_dev; 437 438 buf[3] = 0x3c; 439 /* Set HEADSUP, ORDSUP, SIMPSUP */ 440 buf[5] = 0x07; 441 442 /* If WriteCache emulation is enabled, set V_SUP */ 443 if (spc_check_dev_wce(dev)) 444 buf[6] = 0x01; 445 return 0; 446 } 447 448 /* Block Limits VPD page */ 449 static sense_reason_t 450 spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) 451 { 452 struct se_device *dev = cmd->se_dev; 453 u32 max_sectors; 454 int have_tp = 0; 455 456 /* 457 * Following spc3r22 section 6.5.3 Block Limits VPD page, when 458 * emulate_tpu=1 or emulate_tpws=1 we will be expect a 459 * different page length for Thin Provisioning. 460 */ 461 if (dev->dev_attrib.emulate_tpu || dev->dev_attrib.emulate_tpws) 462 have_tp = 1; 463 464 buf[0] = dev->transport->get_device_type(dev); 465 buf[3] = have_tp ? 0x3c : 0x10; 466 467 /* Set WSNZ to 1 */ 468 buf[4] = 0x01; 469 /* 470 * Set MAXIMUM COMPARE AND WRITE LENGTH 471 */ 472 if (dev->dev_attrib.emulate_caw) 473 buf[5] = 0x01; 474 475 /* 476 * Set OPTIMAL TRANSFER LENGTH GRANULARITY 477 */ 478 put_unaligned_be16(1, &buf[6]); 479 480 /* 481 * Set MAXIMUM TRANSFER LENGTH 482 */ 483 max_sectors = min(dev->dev_attrib.fabric_max_sectors, 484 dev->dev_attrib.hw_max_sectors); 485 put_unaligned_be32(max_sectors, &buf[8]); 486 487 /* 488 * Set OPTIMAL TRANSFER LENGTH 489 */ 490 put_unaligned_be32(dev->dev_attrib.optimal_sectors, &buf[12]); 491 492 /* 493 * Exit now if we don't support TP. 494 */ 495 if (!have_tp) 496 goto max_write_same; 497 498 /* 499 * Set MAXIMUM UNMAP LBA COUNT 500 */ 501 put_unaligned_be32(dev->dev_attrib.max_unmap_lba_count, &buf[20]); 502 503 /* 504 * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT 505 */ 506 put_unaligned_be32(dev->dev_attrib.max_unmap_block_desc_count, 507 &buf[24]); 508 509 /* 510 * Set OPTIMAL UNMAP GRANULARITY 511 */ 512 put_unaligned_be32(dev->dev_attrib.unmap_granularity, &buf[28]); 513 514 /* 515 * UNMAP GRANULARITY ALIGNMENT 516 */ 517 put_unaligned_be32(dev->dev_attrib.unmap_granularity_alignment, 518 &buf[32]); 519 if (dev->dev_attrib.unmap_granularity_alignment != 0) 520 buf[32] |= 0x80; /* Set the UGAVALID bit */ 521 522 /* 523 * MAXIMUM WRITE SAME LENGTH 524 */ 525 max_write_same: 526 put_unaligned_be64(dev->dev_attrib.max_write_same_len, &buf[36]); 527 528 return 0; 529 } 530 531 /* Block Device Characteristics VPD page */ 532 static sense_reason_t 533 spc_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) 534 { 535 struct se_device *dev = cmd->se_dev; 536 537 buf[0] = dev->transport->get_device_type(dev); 538 buf[3] = 0x3c; 539 buf[5] = dev->dev_attrib.is_nonrot ? 1 : 0; 540 541 return 0; 542 } 543 544 /* Thin Provisioning VPD */ 545 static sense_reason_t 546 spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) 547 { 548 struct se_device *dev = cmd->se_dev; 549 550 /* 551 * From spc3r22 section 6.5.4 Thin Provisioning VPD page: 552 * 553 * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to 554 * zero, then the page length shall be set to 0004h. If the DP bit 555 * is set to one, then the page length shall be set to the value 556 * defined in table 162. 557 */ 558 buf[0] = dev->transport->get_device_type(dev); 559 560 /* 561 * Set Hardcoded length mentioned above for DP=0 562 */ 563 put_unaligned_be16(0x0004, &buf[2]); 564 565 /* 566 * The THRESHOLD EXPONENT field indicates the threshold set size in 567 * LBAs as a power of 2 (i.e., the threshold set size is equal to 568 * 2(threshold exponent)). 569 * 570 * Note that this is currently set to 0x00 as mkp says it will be 571 * changing again. We can enable this once it has settled in T10 572 * and is actually used by Linux/SCSI ML code. 573 */ 574 buf[4] = 0x00; 575 576 /* 577 * A TPU bit set to one indicates that the device server supports 578 * the UNMAP command (see 5.25). A TPU bit set to zero indicates 579 * that the device server does not support the UNMAP command. 580 */ 581 if (dev->dev_attrib.emulate_tpu != 0) 582 buf[5] = 0x80; 583 584 /* 585 * A TPWS bit set to one indicates that the device server supports 586 * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. 587 * A TPWS bit set to zero indicates that the device server does not 588 * support the use of the WRITE SAME (16) command to unmap LBAs. 589 */ 590 if (dev->dev_attrib.emulate_tpws != 0) 591 buf[5] |= 0x40; 592 593 return 0; 594 } 595 596 static sense_reason_t 597 spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); 598 599 static struct { 600 uint8_t page; 601 sense_reason_t (*emulate)(struct se_cmd *, unsigned char *); 602 } evpd_handlers[] = { 603 { .page = 0x00, .emulate = spc_emulate_evpd_00 }, 604 { .page = 0x80, .emulate = spc_emulate_evpd_80 }, 605 { .page = 0x83, .emulate = spc_emulate_evpd_83 }, 606 { .page = 0x86, .emulate = spc_emulate_evpd_86 }, 607 { .page = 0xb0, .emulate = spc_emulate_evpd_b0 }, 608 { .page = 0xb1, .emulate = spc_emulate_evpd_b1 }, 609 { .page = 0xb2, .emulate = spc_emulate_evpd_b2 }, 610 }; 611 612 /* supported vital product data pages */ 613 static sense_reason_t 614 spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) 615 { 616 int p; 617 618 /* 619 * Only report the INQUIRY EVPD=1 pages after a valid NAA 620 * Registered Extended LUN WWN has been set via ConfigFS 621 * during device creation/restart. 622 */ 623 if (cmd->se_dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { 624 buf[3] = ARRAY_SIZE(evpd_handlers); 625 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) 626 buf[p + 4] = evpd_handlers[p].page; 627 } 628 629 return 0; 630 } 631 632 static sense_reason_t 633 spc_emulate_inquiry(struct se_cmd *cmd) 634 { 635 struct se_device *dev = cmd->se_dev; 636 struct se_portal_group *tpg = cmd->se_lun->lun_sep->sep_tpg; 637 unsigned char *rbuf; 638 unsigned char *cdb = cmd->t_task_cdb; 639 unsigned char buf[SE_INQUIRY_BUF]; 640 sense_reason_t ret; 641 int p; 642 643 memset(buf, 0, SE_INQUIRY_BUF); 644 645 if (dev == tpg->tpg_virt_lun0.lun_se_dev) 646 buf[0] = 0x3f; /* Not connected */ 647 else 648 buf[0] = dev->transport->get_device_type(dev); 649 650 if (!(cdb[1] & 0x1)) { 651 if (cdb[2]) { 652 pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n", 653 cdb[2]); 654 ret = TCM_INVALID_CDB_FIELD; 655 goto out; 656 } 657 658 ret = spc_emulate_inquiry_std(cmd, buf); 659 goto out; 660 } 661 662 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) { 663 if (cdb[2] == evpd_handlers[p].page) { 664 buf[1] = cdb[2]; 665 ret = evpd_handlers[p].emulate(cmd, buf); 666 goto out; 667 } 668 } 669 670 pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); 671 ret = TCM_INVALID_CDB_FIELD; 672 673 out: 674 rbuf = transport_kmap_data_sg(cmd); 675 if (rbuf) { 676 memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length)); 677 transport_kunmap_data_sg(cmd); 678 } 679 680 if (!ret) 681 target_complete_cmd(cmd, GOOD); 682 return ret; 683 } 684 685 static int spc_modesense_rwrecovery(struct se_device *dev, u8 pc, u8 *p) 686 { 687 p[0] = 0x01; 688 p[1] = 0x0a; 689 690 /* No changeable values for now */ 691 if (pc == 1) 692 goto out; 693 694 out: 695 return 12; 696 } 697 698 static int spc_modesense_control(struct se_device *dev, u8 pc, u8 *p) 699 { 700 p[0] = 0x0a; 701 p[1] = 0x0a; 702 703 /* No changeable values for now */ 704 if (pc == 1) 705 goto out; 706 707 p[2] = 2; 708 /* 709 * From spc4r23, 7.4.7 Control mode page 710 * 711 * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies 712 * restrictions on the algorithm used for reordering commands 713 * having the SIMPLE task attribute (see SAM-4). 714 * 715 * Table 368 -- QUEUE ALGORITHM MODIFIER field 716 * Code Description 717 * 0h Restricted reordering 718 * 1h Unrestricted reordering allowed 719 * 2h to 7h Reserved 720 * 8h to Fh Vendor specific 721 * 722 * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that 723 * the device server shall order the processing sequence of commands 724 * having the SIMPLE task attribute such that data integrity is maintained 725 * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol 726 * requests is halted at any time, the final value of all data observable 727 * on the medium shall be the same as if all the commands had been processed 728 * with the ORDERED task attribute). 729 * 730 * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the 731 * device server may reorder the processing sequence of commands having the 732 * SIMPLE task attribute in any manner. Any data integrity exposures related to 733 * command sequence order shall be explicitly handled by the application client 734 * through the selection of appropriate ommands and task attributes. 735 */ 736 p[3] = (dev->dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; 737 /* 738 * From spc4r17, section 7.4.6 Control mode Page 739 * 740 * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b 741 * 742 * 00b: The logical unit shall clear any unit attention condition 743 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION 744 * status and shall not establish a unit attention condition when a com- 745 * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT 746 * status. 747 * 748 * 10b: The logical unit shall not clear any unit attention condition 749 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION 750 * status and shall not establish a unit attention condition when 751 * a command is completed with BUSY, TASK SET FULL, or RESERVATION 752 * CONFLICT status. 753 * 754 * 11b a The logical unit shall not clear any unit attention condition 755 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION 756 * status and shall establish a unit attention condition for the 757 * initiator port associated with the I_T nexus on which the BUSY, 758 * TASK SET FULL, or RESERVATION CONFLICT status is being returned. 759 * Depending on the status, the additional sense code shall be set to 760 * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS 761 * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE 762 * command, a unit attention condition shall be established only once 763 * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless 764 * to the number of commands completed with one of those status codes. 765 */ 766 p[4] = (dev->dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : 767 (dev->dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; 768 /* 769 * From spc4r17, section 7.4.6 Control mode Page 770 * 771 * Task Aborted Status (TAS) bit set to zero. 772 * 773 * A task aborted status (TAS) bit set to zero specifies that aborted 774 * tasks shall be terminated by the device server without any response 775 * to the application client. A TAS bit set to one specifies that tasks 776 * aborted by the actions of an I_T nexus other than the I_T nexus on 777 * which the command was received shall be completed with TASK ABORTED 778 * status (see SAM-4). 779 */ 780 p[5] = (dev->dev_attrib.emulate_tas) ? 0x40 : 0x00; 781 p[8] = 0xff; 782 p[9] = 0xff; 783 p[11] = 30; 784 785 out: 786 return 12; 787 } 788 789 static int spc_modesense_caching(struct se_device *dev, u8 pc, u8 *p) 790 { 791 p[0] = 0x08; 792 p[1] = 0x12; 793 794 /* No changeable values for now */ 795 if (pc == 1) 796 goto out; 797 798 if (spc_check_dev_wce(dev)) 799 p[2] = 0x04; /* Write Cache Enable */ 800 p[12] = 0x20; /* Disabled Read Ahead */ 801 802 out: 803 return 20; 804 } 805 806 static int spc_modesense_informational_exceptions(struct se_device *dev, u8 pc, unsigned char *p) 807 { 808 p[0] = 0x1c; 809 p[1] = 0x0a; 810 811 /* No changeable values for now */ 812 if (pc == 1) 813 goto out; 814 815 out: 816 return 12; 817 } 818 819 static struct { 820 uint8_t page; 821 uint8_t subpage; 822 int (*emulate)(struct se_device *, u8, unsigned char *); 823 } modesense_handlers[] = { 824 { .page = 0x01, .subpage = 0x00, .emulate = spc_modesense_rwrecovery }, 825 { .page = 0x08, .subpage = 0x00, .emulate = spc_modesense_caching }, 826 { .page = 0x0a, .subpage = 0x00, .emulate = spc_modesense_control }, 827 { .page = 0x1c, .subpage = 0x00, .emulate = spc_modesense_informational_exceptions }, 828 }; 829 830 static void spc_modesense_write_protect(unsigned char *buf, int type) 831 { 832 /* 833 * I believe that the WP bit (bit 7) in the mode header is the same for 834 * all device types.. 835 */ 836 switch (type) { 837 case TYPE_DISK: 838 case TYPE_TAPE: 839 default: 840 buf[0] |= 0x80; /* WP bit */ 841 break; 842 } 843 } 844 845 static void spc_modesense_dpofua(unsigned char *buf, int type) 846 { 847 switch (type) { 848 case TYPE_DISK: 849 buf[0] |= 0x10; /* DPOFUA bit */ 850 break; 851 default: 852 break; 853 } 854 } 855 856 static int spc_modesense_blockdesc(unsigned char *buf, u64 blocks, u32 block_size) 857 { 858 *buf++ = 8; 859 put_unaligned_be32(min(blocks, 0xffffffffull), buf); 860 buf += 4; 861 put_unaligned_be32(block_size, buf); 862 return 9; 863 } 864 865 static int spc_modesense_long_blockdesc(unsigned char *buf, u64 blocks, u32 block_size) 866 { 867 if (blocks <= 0xffffffff) 868 return spc_modesense_blockdesc(buf + 3, blocks, block_size) + 3; 869 870 *buf++ = 1; /* LONGLBA */ 871 buf += 2; 872 *buf++ = 16; 873 put_unaligned_be64(blocks, buf); 874 buf += 12; 875 put_unaligned_be32(block_size, buf); 876 877 return 17; 878 } 879 880 static sense_reason_t spc_emulate_modesense(struct se_cmd *cmd) 881 { 882 struct se_device *dev = cmd->se_dev; 883 char *cdb = cmd->t_task_cdb; 884 unsigned char buf[SE_MODE_PAGE_BUF], *rbuf; 885 int type = dev->transport->get_device_type(dev); 886 int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10); 887 bool dbd = !!(cdb[1] & 0x08); 888 bool llba = ten ? !!(cdb[1] & 0x10) : false; 889 u8 pc = cdb[2] >> 6; 890 u8 page = cdb[2] & 0x3f; 891 u8 subpage = cdb[3]; 892 int length = 0; 893 int ret; 894 int i; 895 896 memset(buf, 0, SE_MODE_PAGE_BUF); 897 898 /* 899 * Skip over MODE DATA LENGTH + MEDIUM TYPE fields to byte 3 for 900 * MODE_SENSE_10 and byte 2 for MODE_SENSE (6). 901 */ 902 length = ten ? 3 : 2; 903 904 /* DEVICE-SPECIFIC PARAMETER */ 905 if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || 906 (cmd->se_deve && 907 (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) 908 spc_modesense_write_protect(&buf[length], type); 909 910 if ((spc_check_dev_wce(dev)) && 911 (dev->dev_attrib.emulate_fua_write > 0)) 912 spc_modesense_dpofua(&buf[length], type); 913 914 ++length; 915 916 /* BLOCK DESCRIPTOR */ 917 918 /* 919 * For now we only include a block descriptor for disk (SBC) 920 * devices; other command sets use a slightly different format. 921 */ 922 if (!dbd && type == TYPE_DISK) { 923 u64 blocks = dev->transport->get_blocks(dev); 924 u32 block_size = dev->dev_attrib.block_size; 925 926 if (ten) { 927 if (llba) { 928 length += spc_modesense_long_blockdesc(&buf[length], 929 blocks, block_size); 930 } else { 931 length += 3; 932 length += spc_modesense_blockdesc(&buf[length], 933 blocks, block_size); 934 } 935 } else { 936 length += spc_modesense_blockdesc(&buf[length], blocks, 937 block_size); 938 } 939 } else { 940 if (ten) 941 length += 4; 942 else 943 length += 1; 944 } 945 946 if (page == 0x3f) { 947 if (subpage != 0x00 && subpage != 0xff) { 948 pr_warn("MODE_SENSE: Invalid subpage code: 0x%02x\n", subpage); 949 return TCM_INVALID_CDB_FIELD; 950 } 951 952 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) { 953 /* 954 * Tricky way to say all subpage 00h for 955 * subpage==0, all subpages for subpage==0xff 956 * (and we just checked above that those are 957 * the only two possibilities). 958 */ 959 if ((modesense_handlers[i].subpage & ~subpage) == 0) { 960 ret = modesense_handlers[i].emulate(dev, pc, &buf[length]); 961 if (!ten && length + ret >= 255) 962 break; 963 length += ret; 964 } 965 } 966 967 goto set_length; 968 } 969 970 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) 971 if (modesense_handlers[i].page == page && 972 modesense_handlers[i].subpage == subpage) { 973 length += modesense_handlers[i].emulate(dev, pc, &buf[length]); 974 goto set_length; 975 } 976 977 /* 978 * We don't intend to implement: 979 * - obsolete page 03h "format parameters" (checked by Solaris) 980 */ 981 if (page != 0x03) 982 pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", 983 page, subpage); 984 985 return TCM_UNKNOWN_MODE_PAGE; 986 987 set_length: 988 if (ten) 989 put_unaligned_be16(length - 2, buf); 990 else 991 buf[0] = length - 1; 992 993 rbuf = transport_kmap_data_sg(cmd); 994 if (rbuf) { 995 memcpy(rbuf, buf, min_t(u32, SE_MODE_PAGE_BUF, cmd->data_length)); 996 transport_kunmap_data_sg(cmd); 997 } 998 999 target_complete_cmd(cmd, GOOD); 1000 return 0; 1001 } 1002 1003 static sense_reason_t spc_emulate_modeselect(struct se_cmd *cmd) 1004 { 1005 struct se_device *dev = cmd->se_dev; 1006 char *cdb = cmd->t_task_cdb; 1007 bool ten = cdb[0] == MODE_SELECT_10; 1008 int off = ten ? 8 : 4; 1009 bool pf = !!(cdb[1] & 0x10); 1010 u8 page, subpage; 1011 unsigned char *buf; 1012 unsigned char tbuf[SE_MODE_PAGE_BUF]; 1013 int length; 1014 int ret = 0; 1015 int i; 1016 1017 if (!cmd->data_length) { 1018 target_complete_cmd(cmd, GOOD); 1019 return 0; 1020 } 1021 1022 if (cmd->data_length < off + 2) 1023 return TCM_PARAMETER_LIST_LENGTH_ERROR; 1024 1025 buf = transport_kmap_data_sg(cmd); 1026 if (!buf) 1027 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1028 1029 if (!pf) { 1030 ret = TCM_INVALID_CDB_FIELD; 1031 goto out; 1032 } 1033 1034 page = buf[off] & 0x3f; 1035 subpage = buf[off] & 0x40 ? buf[off + 1] : 0; 1036 1037 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) 1038 if (modesense_handlers[i].page == page && 1039 modesense_handlers[i].subpage == subpage) { 1040 memset(tbuf, 0, SE_MODE_PAGE_BUF); 1041 length = modesense_handlers[i].emulate(dev, 0, tbuf); 1042 goto check_contents; 1043 } 1044 1045 ret = TCM_UNKNOWN_MODE_PAGE; 1046 goto out; 1047 1048 check_contents: 1049 if (cmd->data_length < off + length) { 1050 ret = TCM_PARAMETER_LIST_LENGTH_ERROR; 1051 goto out; 1052 } 1053 1054 if (memcmp(buf + off, tbuf, length)) 1055 ret = TCM_INVALID_PARAMETER_LIST; 1056 1057 out: 1058 transport_kunmap_data_sg(cmd); 1059 1060 if (!ret) 1061 target_complete_cmd(cmd, GOOD); 1062 return ret; 1063 } 1064 1065 static sense_reason_t spc_emulate_request_sense(struct se_cmd *cmd) 1066 { 1067 unsigned char *cdb = cmd->t_task_cdb; 1068 unsigned char *rbuf; 1069 u8 ua_asc = 0, ua_ascq = 0; 1070 unsigned char buf[SE_SENSE_BUF]; 1071 1072 memset(buf, 0, SE_SENSE_BUF); 1073 1074 if (cdb[1] & 0x01) { 1075 pr_err("REQUEST_SENSE description emulation not" 1076 " supported\n"); 1077 return TCM_INVALID_CDB_FIELD; 1078 } 1079 1080 rbuf = transport_kmap_data_sg(cmd); 1081 if (!rbuf) 1082 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1083 1084 if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) { 1085 /* 1086 * CURRENT ERROR, UNIT ATTENTION 1087 */ 1088 buf[0] = 0x70; 1089 buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; 1090 1091 /* 1092 * The Additional Sense Code (ASC) from the UNIT ATTENTION 1093 */ 1094 buf[SPC_ASC_KEY_OFFSET] = ua_asc; 1095 buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; 1096 buf[7] = 0x0A; 1097 } else { 1098 /* 1099 * CURRENT ERROR, NO SENSE 1100 */ 1101 buf[0] = 0x70; 1102 buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; 1103 1104 /* 1105 * NO ADDITIONAL SENSE INFORMATION 1106 */ 1107 buf[SPC_ASC_KEY_OFFSET] = 0x00; 1108 buf[7] = 0x0A; 1109 } 1110 1111 memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length)); 1112 transport_kunmap_data_sg(cmd); 1113 1114 target_complete_cmd(cmd, GOOD); 1115 return 0; 1116 } 1117 1118 sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd) 1119 { 1120 struct se_dev_entry *deve; 1121 struct se_session *sess = cmd->se_sess; 1122 unsigned char *buf; 1123 u32 lun_count = 0, offset = 8, i; 1124 1125 if (cmd->data_length < 16) { 1126 pr_warn("REPORT LUNS allocation length %u too small\n", 1127 cmd->data_length); 1128 return TCM_INVALID_CDB_FIELD; 1129 } 1130 1131 buf = transport_kmap_data_sg(cmd); 1132 if (!buf) 1133 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1134 1135 /* 1136 * If no struct se_session pointer is present, this struct se_cmd is 1137 * coming via a target_core_mod PASSTHROUGH op, and not through 1138 * a $FABRIC_MOD. In that case, report LUN=0 only. 1139 */ 1140 if (!sess) { 1141 int_to_scsilun(0, (struct scsi_lun *)&buf[offset]); 1142 lun_count = 1; 1143 goto done; 1144 } 1145 1146 spin_lock_irq(&sess->se_node_acl->device_list_lock); 1147 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 1148 deve = sess->se_node_acl->device_list[i]; 1149 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 1150 continue; 1151 /* 1152 * We determine the correct LUN LIST LENGTH even once we 1153 * have reached the initial allocation length. 1154 * See SPC2-R20 7.19. 1155 */ 1156 lun_count++; 1157 if ((offset + 8) > cmd->data_length) 1158 continue; 1159 1160 int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]); 1161 offset += 8; 1162 } 1163 spin_unlock_irq(&sess->se_node_acl->device_list_lock); 1164 1165 /* 1166 * See SPC3 r07, page 159. 1167 */ 1168 done: 1169 lun_count *= 8; 1170 buf[0] = ((lun_count >> 24) & 0xff); 1171 buf[1] = ((lun_count >> 16) & 0xff); 1172 buf[2] = ((lun_count >> 8) & 0xff); 1173 buf[3] = (lun_count & 0xff); 1174 transport_kunmap_data_sg(cmd); 1175 1176 target_complete_cmd(cmd, GOOD); 1177 return 0; 1178 } 1179 EXPORT_SYMBOL(spc_emulate_report_luns); 1180 1181 static sense_reason_t 1182 spc_emulate_testunitready(struct se_cmd *cmd) 1183 { 1184 target_complete_cmd(cmd, GOOD); 1185 return 0; 1186 } 1187 1188 sense_reason_t 1189 spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) 1190 { 1191 struct se_device *dev = cmd->se_dev; 1192 unsigned char *cdb = cmd->t_task_cdb; 1193 1194 switch (cdb[0]) { 1195 case MODE_SELECT: 1196 *size = cdb[4]; 1197 cmd->execute_cmd = spc_emulate_modeselect; 1198 break; 1199 case MODE_SELECT_10: 1200 *size = (cdb[7] << 8) + cdb[8]; 1201 cmd->execute_cmd = spc_emulate_modeselect; 1202 break; 1203 case MODE_SENSE: 1204 *size = cdb[4]; 1205 cmd->execute_cmd = spc_emulate_modesense; 1206 break; 1207 case MODE_SENSE_10: 1208 *size = (cdb[7] << 8) + cdb[8]; 1209 cmd->execute_cmd = spc_emulate_modesense; 1210 break; 1211 case LOG_SELECT: 1212 case LOG_SENSE: 1213 *size = (cdb[7] << 8) + cdb[8]; 1214 break; 1215 case PERSISTENT_RESERVE_IN: 1216 *size = (cdb[7] << 8) + cdb[8]; 1217 cmd->execute_cmd = target_scsi3_emulate_pr_in; 1218 break; 1219 case PERSISTENT_RESERVE_OUT: 1220 *size = (cdb[7] << 8) + cdb[8]; 1221 cmd->execute_cmd = target_scsi3_emulate_pr_out; 1222 break; 1223 case RELEASE: 1224 case RELEASE_10: 1225 if (cdb[0] == RELEASE_10) 1226 *size = (cdb[7] << 8) | cdb[8]; 1227 else 1228 *size = cmd->data_length; 1229 1230 cmd->execute_cmd = target_scsi2_reservation_release; 1231 break; 1232 case RESERVE: 1233 case RESERVE_10: 1234 /* 1235 * The SPC-2 RESERVE does not contain a size in the SCSI CDB. 1236 * Assume the passthrough or $FABRIC_MOD will tell us about it. 1237 */ 1238 if (cdb[0] == RESERVE_10) 1239 *size = (cdb[7] << 8) | cdb[8]; 1240 else 1241 *size = cmd->data_length; 1242 1243 cmd->execute_cmd = target_scsi2_reservation_reserve; 1244 break; 1245 case REQUEST_SENSE: 1246 *size = cdb[4]; 1247 cmd->execute_cmd = spc_emulate_request_sense; 1248 break; 1249 case INQUIRY: 1250 *size = (cdb[3] << 8) + cdb[4]; 1251 1252 /* 1253 * Do implict HEAD_OF_QUEUE processing for INQUIRY. 1254 * See spc4r17 section 5.3 1255 */ 1256 cmd->sam_task_attr = MSG_HEAD_TAG; 1257 cmd->execute_cmd = spc_emulate_inquiry; 1258 break; 1259 case SECURITY_PROTOCOL_IN: 1260 case SECURITY_PROTOCOL_OUT: 1261 *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; 1262 break; 1263 case EXTENDED_COPY: 1264 *size = get_unaligned_be32(&cdb[10]); 1265 cmd->execute_cmd = target_do_xcopy; 1266 break; 1267 case RECEIVE_COPY_RESULTS: 1268 *size = get_unaligned_be32(&cdb[10]); 1269 cmd->execute_cmd = target_do_receive_copy_results; 1270 break; 1271 case READ_ATTRIBUTE: 1272 case WRITE_ATTRIBUTE: 1273 *size = (cdb[10] << 24) | (cdb[11] << 16) | 1274 (cdb[12] << 8) | cdb[13]; 1275 break; 1276 case RECEIVE_DIAGNOSTIC: 1277 case SEND_DIAGNOSTIC: 1278 *size = (cdb[3] << 8) | cdb[4]; 1279 break; 1280 case WRITE_BUFFER: 1281 *size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; 1282 break; 1283 case REPORT_LUNS: 1284 cmd->execute_cmd = spc_emulate_report_luns; 1285 *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; 1286 /* 1287 * Do implict HEAD_OF_QUEUE processing for REPORT_LUNS 1288 * See spc4r17 section 5.3 1289 */ 1290 cmd->sam_task_attr = MSG_HEAD_TAG; 1291 break; 1292 case TEST_UNIT_READY: 1293 cmd->execute_cmd = spc_emulate_testunitready; 1294 *size = 0; 1295 break; 1296 case MAINTENANCE_IN: 1297 if (dev->transport->get_device_type(dev) != TYPE_ROM) { 1298 /* 1299 * MAINTENANCE_IN from SCC-2 1300 * Check for emulated MI_REPORT_TARGET_PGS 1301 */ 1302 if ((cdb[1] & 0x1f) == MI_REPORT_TARGET_PGS) { 1303 cmd->execute_cmd = 1304 target_emulate_report_target_port_groups; 1305 } 1306 *size = get_unaligned_be32(&cdb[6]); 1307 } else { 1308 /* 1309 * GPCMD_SEND_KEY from multi media commands 1310 */ 1311 *size = get_unaligned_be16(&cdb[8]); 1312 } 1313 break; 1314 case MAINTENANCE_OUT: 1315 if (dev->transport->get_device_type(dev) != TYPE_ROM) { 1316 /* 1317 * MAINTENANCE_OUT from SCC-2 1318 * Check for emulated MO_SET_TARGET_PGS. 1319 */ 1320 if (cdb[1] == MO_SET_TARGET_PGS) { 1321 cmd->execute_cmd = 1322 target_emulate_set_target_port_groups; 1323 } 1324 *size = get_unaligned_be32(&cdb[6]); 1325 } else { 1326 /* 1327 * GPCMD_SEND_KEY from multi media commands 1328 */ 1329 *size = get_unaligned_be16(&cdb[8]); 1330 } 1331 break; 1332 default: 1333 pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode" 1334 " 0x%02x, sending CHECK_CONDITION.\n", 1335 cmd->se_tfo->get_fabric_name(), cdb[0]); 1336 return TCM_UNSUPPORTED_SCSI_OPCODE; 1337 } 1338 1339 return 0; 1340 } 1341 EXPORT_SYMBOL(spc_parse_cdb); 1342