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_proto.h> 28 #include <scsi/scsi_common.h> 29 #include <scsi/scsi_tcq.h> 30 31 #include <target/target_core_base.h> 32 #include <target/target_core_backend.h> 33 #include <target/target_core_fabric.h> 34 35 #include "target_core_internal.h" 36 #include "target_core_alua.h" 37 #include "target_core_pr.h" 38 #include "target_core_ua.h" 39 #include "target_core_xcopy.h" 40 41 static void spc_fill_alua_data(struct se_lun *lun, unsigned char *buf) 42 { 43 struct t10_alua_tg_pt_gp *tg_pt_gp; 44 45 /* 46 * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS. 47 */ 48 buf[5] = 0x80; 49 50 /* 51 * Set TPGS field for explicit and/or implicit ALUA access type 52 * and opteration. 53 * 54 * See spc4r17 section 6.4.2 Table 135 55 */ 56 spin_lock(&lun->lun_tg_pt_gp_lock); 57 tg_pt_gp = lun->lun_tg_pt_gp; 58 if (tg_pt_gp) 59 buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; 60 spin_unlock(&lun->lun_tg_pt_gp_lock); 61 } 62 63 sense_reason_t 64 spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char *buf) 65 { 66 struct se_lun *lun = cmd->se_lun; 67 struct se_device *dev = cmd->se_dev; 68 struct se_session *sess = cmd->se_sess; 69 70 /* Set RMB (removable media) for tape devices */ 71 if (dev->transport->get_device_type(dev) == TYPE_TAPE) 72 buf[1] = 0x80; 73 74 buf[2] = 0x05; /* SPC-3 */ 75 76 /* 77 * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2 78 * 79 * SPC4 says: 80 * A RESPONSE DATA FORMAT field set to 2h indicates that the 81 * standard INQUIRY data is in the format defined in this 82 * standard. Response data format values less than 2h are 83 * obsolete. Response data format values greater than 2h are 84 * reserved. 85 */ 86 buf[3] = 2; 87 88 /* 89 * Enable SCCS and TPGS fields for Emulated ALUA 90 */ 91 spc_fill_alua_data(lun, buf); 92 93 /* 94 * Set Third-Party Copy (3PC) bit to indicate support for EXTENDED_COPY 95 */ 96 if (dev->dev_attrib.emulate_3pc) 97 buf[5] |= 0x8; 98 /* 99 * Set Protection (PROTECT) bit when DIF has been enabled on the 100 * device, and the fabric supports VERIFY + PASS. Also report 101 * PROTECT=1 if sess_prot_type has been configured to allow T10-PI 102 * to unprotected devices. 103 */ 104 if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) { 105 if (dev->dev_attrib.pi_prot_type || cmd->se_sess->sess_prot_type) 106 buf[5] |= 0x1; 107 } 108 109 buf[7] = 0x2; /* CmdQue=1 */ 110 111 memcpy(&buf[8], "LIO-ORG ", 8); 112 memset(&buf[16], 0x20, 16); 113 memcpy(&buf[16], dev->t10_wwn.model, 114 min_t(size_t, strlen(dev->t10_wwn.model), 16)); 115 memcpy(&buf[32], dev->t10_wwn.revision, 116 min_t(size_t, strlen(dev->t10_wwn.revision), 4)); 117 buf[4] = 31; /* Set additional length to 31 */ 118 119 return 0; 120 } 121 EXPORT_SYMBOL(spc_emulate_inquiry_std); 122 123 /* unit serial number */ 124 static sense_reason_t 125 spc_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) 126 { 127 struct se_device *dev = cmd->se_dev; 128 u16 len; 129 130 if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { 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_portal_group *tpg = NULL; 179 struct t10_alua_lu_gp_member *lu_gp_mem; 180 struct t10_alua_tg_pt_gp *tg_pt_gp; 181 unsigned char *prod = &dev->t10_wwn.model[0]; 182 u32 prod_len; 183 u32 unit_serial_len, off = 0; 184 u16 len = 0, id_len; 185 186 off = 4; 187 188 /* 189 * NAA IEEE Registered Extended Assigned designator format, see 190 * spc4r17 section 7.7.3.6.5 191 * 192 * We depend upon a target_core_mod/ConfigFS provided 193 * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial 194 * value in order to return the NAA id. 195 */ 196 if (!(dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL)) 197 goto check_t10_vend_desc; 198 199 /* CODE SET == Binary */ 200 buf[off++] = 0x1; 201 202 /* Set ASSOCIATION == addressed logical unit: 0)b */ 203 buf[off] = 0x00; 204 205 /* Identifier/Designator type == NAA identifier */ 206 buf[off++] |= 0x3; 207 off++; 208 209 /* Identifier/Designator length */ 210 buf[off++] = 0x10; 211 212 /* 213 * Start NAA IEEE Registered Extended Identifier/Designator 214 */ 215 buf[off++] = (0x6 << 4); 216 217 /* 218 * Use OpenFabrics IEEE Company ID: 00 14 05 219 */ 220 buf[off++] = 0x01; 221 buf[off++] = 0x40; 222 buf[off] = (0x5 << 4); 223 224 /* 225 * Return ConfigFS Unit Serial Number information for 226 * VENDOR_SPECIFIC_IDENTIFIER and 227 * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION 228 */ 229 spc_parse_naa_6h_vendor_specific(dev, &buf[off]); 230 231 len = 20; 232 off = (len + 4); 233 234 check_t10_vend_desc: 235 /* 236 * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 237 */ 238 id_len = 8; /* For Vendor field */ 239 prod_len = 4; /* For VPD Header */ 240 prod_len += 8; /* For Vendor field */ 241 prod_len += strlen(prod); 242 prod_len++; /* For : */ 243 244 if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { 245 unit_serial_len = strlen(&dev->t10_wwn.unit_serial[0]); 246 unit_serial_len++; /* For NULL Terminator */ 247 248 id_len += sprintf(&buf[off+12], "%s:%s", prod, 249 &dev->t10_wwn.unit_serial[0]); 250 } 251 buf[off] = 0x2; /* ASCII */ 252 buf[off+1] = 0x1; /* T10 Vendor ID */ 253 buf[off+2] = 0x0; 254 memcpy(&buf[off+4], "LIO-ORG", 8); 255 /* Extra Byte for NULL Terminator */ 256 id_len++; 257 /* Identifier Length */ 258 buf[off+3] = id_len; 259 /* Header size for Designation descriptor */ 260 len += (id_len + 4); 261 off += (id_len + 4); 262 263 if (1) { 264 struct t10_alua_lu_gp *lu_gp; 265 u32 padding, scsi_name_len, scsi_target_len; 266 u16 lu_gp_id = 0; 267 u16 tg_pt_gp_id = 0; 268 u16 tpgt; 269 270 tpg = lun->lun_tpg; 271 /* 272 * Relative target port identifer, see spc4r17 273 * section 7.7.3.7 274 * 275 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 276 * section 7.5.1 Table 362 277 */ 278 buf[off] = tpg->proto_id << 4; 279 buf[off++] |= 0x1; /* CODE SET == Binary */ 280 buf[off] = 0x80; /* Set PIV=1 */ 281 /* Set ASSOCIATION == target port: 01b */ 282 buf[off] |= 0x10; 283 /* DESIGNATOR TYPE == Relative target port identifer */ 284 buf[off++] |= 0x4; 285 off++; /* Skip over Reserved */ 286 buf[off++] = 4; /* DESIGNATOR LENGTH */ 287 /* Skip over Obsolete field in RTPI payload 288 * in Table 472 */ 289 off += 2; 290 buf[off++] = ((lun->lun_rtpi >> 8) & 0xff); 291 buf[off++] = (lun->lun_rtpi & 0xff); 292 len += 8; /* Header size + Designation descriptor */ 293 /* 294 * Target port group identifier, see spc4r17 295 * section 7.7.3.8 296 * 297 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 298 * section 7.5.1 Table 362 299 */ 300 spin_lock(&lun->lun_tg_pt_gp_lock); 301 tg_pt_gp = lun->lun_tg_pt_gp; 302 if (!tg_pt_gp) { 303 spin_unlock(&lun->lun_tg_pt_gp_lock); 304 goto check_lu_gp; 305 } 306 tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; 307 spin_unlock(&lun->lun_tg_pt_gp_lock); 308 309 buf[off] = tpg->proto_id << 4; 310 buf[off++] |= 0x1; /* CODE SET == Binary */ 311 buf[off] = 0x80; /* Set PIV=1 */ 312 /* Set ASSOCIATION == target port: 01b */ 313 buf[off] |= 0x10; 314 /* DESIGNATOR TYPE == Target port group identifier */ 315 buf[off++] |= 0x5; 316 off++; /* Skip over Reserved */ 317 buf[off++] = 4; /* DESIGNATOR LENGTH */ 318 off += 2; /* Skip over Reserved Field */ 319 buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); 320 buf[off++] = (tg_pt_gp_id & 0xff); 321 len += 8; /* Header size + Designation descriptor */ 322 /* 323 * Logical Unit Group identifier, see spc4r17 324 * section 7.7.3.8 325 */ 326 check_lu_gp: 327 lu_gp_mem = dev->dev_alua_lu_gp_mem; 328 if (!lu_gp_mem) 329 goto check_scsi_name; 330 331 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 332 lu_gp = lu_gp_mem->lu_gp; 333 if (!lu_gp) { 334 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 335 goto check_scsi_name; 336 } 337 lu_gp_id = lu_gp->lu_gp_id; 338 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 339 340 buf[off++] |= 0x1; /* CODE SET == Binary */ 341 /* DESIGNATOR TYPE == Logical Unit Group identifier */ 342 buf[off++] |= 0x6; 343 off++; /* Skip over Reserved */ 344 buf[off++] = 4; /* DESIGNATOR LENGTH */ 345 off += 2; /* Skip over Reserved Field */ 346 buf[off++] = ((lu_gp_id >> 8) & 0xff); 347 buf[off++] = (lu_gp_id & 0xff); 348 len += 8; /* Header size + Designation descriptor */ 349 /* 350 * SCSI name string designator, see spc4r17 351 * section 7.7.3.11 352 * 353 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 354 * section 7.5.1 Table 362 355 */ 356 check_scsi_name: 357 buf[off] = tpg->proto_id << 4; 358 buf[off++] |= 0x3; /* CODE SET == UTF-8 */ 359 buf[off] = 0x80; /* Set PIV=1 */ 360 /* Set ASSOCIATION == target port: 01b */ 361 buf[off] |= 0x10; 362 /* DESIGNATOR TYPE == SCSI name string */ 363 buf[off++] |= 0x8; 364 off += 2; /* Skip over Reserved and length */ 365 /* 366 * SCSI name string identifer containing, $FABRIC_MOD 367 * dependent information. For LIO-Target and iSCSI 368 * Target Port, this means "<iSCSI name>,t,0x<TPGT> in 369 * UTF-8 encoding. 370 */ 371 tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); 372 scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", 373 tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); 374 scsi_name_len += 1 /* Include NULL terminator */; 375 /* 376 * The null-terminated, null-padded (see 4.4.2) SCSI 377 * NAME STRING field contains a UTF-8 format string. 378 * The number of bytes in the SCSI NAME STRING field 379 * (i.e., the value in the DESIGNATOR LENGTH field) 380 * shall be no larger than 256 and shall be a multiple 381 * of four. 382 */ 383 padding = ((-scsi_name_len) & 3); 384 if (padding) 385 scsi_name_len += padding; 386 if (scsi_name_len > 256) 387 scsi_name_len = 256; 388 389 buf[off-1] = scsi_name_len; 390 off += scsi_name_len; 391 /* Header size + Designation descriptor */ 392 len += (scsi_name_len + 4); 393 394 /* 395 * Target device designator 396 */ 397 buf[off] = tpg->proto_id << 4; 398 buf[off++] |= 0x3; /* CODE SET == UTF-8 */ 399 buf[off] = 0x80; /* Set PIV=1 */ 400 /* Set ASSOCIATION == target device: 10b */ 401 buf[off] |= 0x20; 402 /* DESIGNATOR TYPE == SCSI name string */ 403 buf[off++] |= 0x8; 404 off += 2; /* Skip over Reserved and length */ 405 /* 406 * SCSI name string identifer containing, $FABRIC_MOD 407 * dependent information. For LIO-Target and iSCSI 408 * Target Port, this means "<iSCSI name>" in 409 * UTF-8 encoding. 410 */ 411 scsi_target_len = sprintf(&buf[off], "%s", 412 tpg->se_tpg_tfo->tpg_get_wwn(tpg)); 413 scsi_target_len += 1 /* Include NULL terminator */; 414 /* 415 * The null-terminated, null-padded (see 4.4.2) SCSI 416 * NAME STRING field contains a UTF-8 format string. 417 * The number of bytes in the SCSI NAME STRING field 418 * (i.e., the value in the DESIGNATOR LENGTH field) 419 * shall be no larger than 256 and shall be a multiple 420 * of four. 421 */ 422 padding = ((-scsi_target_len) & 3); 423 if (padding) 424 scsi_target_len += padding; 425 if (scsi_target_len > 256) 426 scsi_target_len = 256; 427 428 buf[off-1] = scsi_target_len; 429 off += scsi_target_len; 430 431 /* Header size + Designation descriptor */ 432 len += (scsi_target_len + 4); 433 } 434 buf[2] = ((len >> 8) & 0xff); 435 buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ 436 return 0; 437 } 438 EXPORT_SYMBOL(spc_emulate_evpd_83); 439 440 /* Extended INQUIRY Data VPD Page */ 441 static sense_reason_t 442 spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) 443 { 444 struct se_device *dev = cmd->se_dev; 445 struct se_session *sess = cmd->se_sess; 446 447 buf[3] = 0x3c; 448 /* 449 * Set GRD_CHK + REF_CHK for TYPE1 protection, or GRD_CHK 450 * only for TYPE3 protection. 451 */ 452 if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) { 453 if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE1_PROT || 454 cmd->se_sess->sess_prot_type == TARGET_DIF_TYPE1_PROT) 455 buf[4] = 0x5; 456 else if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE3_PROT || 457 cmd->se_sess->sess_prot_type == TARGET_DIF_TYPE3_PROT) 458 buf[4] = 0x4; 459 } 460 461 /* Set HEADSUP, ORDSUP, SIMPSUP */ 462 buf[5] = 0x07; 463 464 /* If WriteCache emulation is enabled, set V_SUP */ 465 if (target_check_wce(dev)) 466 buf[6] = 0x01; 467 /* If an LBA map is present set R_SUP */ 468 spin_lock(&cmd->se_dev->t10_alua.lba_map_lock); 469 if (!list_empty(&dev->t10_alua.lba_map_list)) 470 buf[8] = 0x10; 471 spin_unlock(&cmd->se_dev->t10_alua.lba_map_lock); 472 return 0; 473 } 474 475 /* Block Limits VPD page */ 476 static sense_reason_t 477 spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) 478 { 479 struct se_device *dev = cmd->se_dev; 480 int have_tp = 0; 481 int opt, min; 482 483 /* 484 * Following spc3r22 section 6.5.3 Block Limits VPD page, when 485 * emulate_tpu=1 or emulate_tpws=1 we will be expect a 486 * different page length for Thin Provisioning. 487 */ 488 if (dev->dev_attrib.emulate_tpu || dev->dev_attrib.emulate_tpws) 489 have_tp = 1; 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 * Set MAXIMUM COMPARE AND WRITE LENGTH 498 */ 499 if (dev->dev_attrib.emulate_caw) 500 buf[5] = 0x01; 501 502 /* 503 * Set OPTIMAL TRANSFER LENGTH GRANULARITY 504 */ 505 if (dev->transport->get_io_min && (min = dev->transport->get_io_min(dev))) 506 put_unaligned_be16(min / dev->dev_attrib.block_size, &buf[6]); 507 else 508 put_unaligned_be16(1, &buf[6]); 509 510 /* 511 * Set MAXIMUM TRANSFER LENGTH 512 */ 513 put_unaligned_be32(dev->dev_attrib.hw_max_sectors, &buf[8]); 514 515 /* 516 * Set OPTIMAL TRANSFER LENGTH 517 */ 518 if (dev->transport->get_io_opt && (opt = dev->transport->get_io_opt(dev))) 519 put_unaligned_be32(opt / dev->dev_attrib.block_size, &buf[12]); 520 else 521 put_unaligned_be32(dev->dev_attrib.optimal_sectors, &buf[12]); 522 523 /* 524 * Exit now if we don't support TP. 525 */ 526 if (!have_tp) 527 goto max_write_same; 528 529 /* 530 * Set MAXIMUM UNMAP LBA COUNT 531 */ 532 put_unaligned_be32(dev->dev_attrib.max_unmap_lba_count, &buf[20]); 533 534 /* 535 * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT 536 */ 537 put_unaligned_be32(dev->dev_attrib.max_unmap_block_desc_count, 538 &buf[24]); 539 540 /* 541 * Set OPTIMAL UNMAP GRANULARITY 542 */ 543 put_unaligned_be32(dev->dev_attrib.unmap_granularity, &buf[28]); 544 545 /* 546 * UNMAP GRANULARITY ALIGNMENT 547 */ 548 put_unaligned_be32(dev->dev_attrib.unmap_granularity_alignment, 549 &buf[32]); 550 if (dev->dev_attrib.unmap_granularity_alignment != 0) 551 buf[32] |= 0x80; /* Set the UGAVALID bit */ 552 553 /* 554 * MAXIMUM WRITE SAME LENGTH 555 */ 556 max_write_same: 557 put_unaligned_be64(dev->dev_attrib.max_write_same_len, &buf[36]); 558 559 return 0; 560 } 561 562 /* Block Device Characteristics VPD page */ 563 static sense_reason_t 564 spc_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) 565 { 566 struct se_device *dev = cmd->se_dev; 567 568 buf[0] = dev->transport->get_device_type(dev); 569 buf[3] = 0x3c; 570 buf[5] = dev->dev_attrib.is_nonrot ? 1 : 0; 571 572 return 0; 573 } 574 575 /* Thin Provisioning VPD */ 576 static sense_reason_t 577 spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) 578 { 579 struct se_device *dev = cmd->se_dev; 580 581 /* 582 * From spc3r22 section 6.5.4 Thin Provisioning VPD page: 583 * 584 * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to 585 * zero, then the page length shall be set to 0004h. If the DP bit 586 * is set to one, then the page length shall be set to the value 587 * defined in table 162. 588 */ 589 buf[0] = dev->transport->get_device_type(dev); 590 591 /* 592 * Set Hardcoded length mentioned above for DP=0 593 */ 594 put_unaligned_be16(0x0004, &buf[2]); 595 596 /* 597 * The THRESHOLD EXPONENT field indicates the threshold set size in 598 * LBAs as a power of 2 (i.e., the threshold set size is equal to 599 * 2(threshold exponent)). 600 * 601 * Note that this is currently set to 0x00 as mkp says it will be 602 * changing again. We can enable this once it has settled in T10 603 * and is actually used by Linux/SCSI ML code. 604 */ 605 buf[4] = 0x00; 606 607 /* 608 * A TPU bit set to one indicates that the device server supports 609 * the UNMAP command (see 5.25). A TPU bit set to zero indicates 610 * that the device server does not support the UNMAP command. 611 */ 612 if (dev->dev_attrib.emulate_tpu != 0) 613 buf[5] = 0x80; 614 615 /* 616 * A TPWS bit set to one indicates that the device server supports 617 * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. 618 * A TPWS bit set to zero indicates that the device server does not 619 * support the use of the WRITE SAME (16) command to unmap LBAs. 620 */ 621 if (dev->dev_attrib.emulate_tpws != 0) 622 buf[5] |= 0x40 | 0x20; 623 624 return 0; 625 } 626 627 /* Referrals VPD page */ 628 static sense_reason_t 629 spc_emulate_evpd_b3(struct se_cmd *cmd, unsigned char *buf) 630 { 631 struct se_device *dev = cmd->se_dev; 632 633 buf[0] = dev->transport->get_device_type(dev); 634 buf[3] = 0x0c; 635 put_unaligned_be32(dev->t10_alua.lba_map_segment_size, &buf[8]); 636 put_unaligned_be32(dev->t10_alua.lba_map_segment_multiplier, &buf[12]); 637 638 return 0; 639 } 640 641 static sense_reason_t 642 spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); 643 644 static struct { 645 uint8_t page; 646 sense_reason_t (*emulate)(struct se_cmd *, unsigned char *); 647 } evpd_handlers[] = { 648 { .page = 0x00, .emulate = spc_emulate_evpd_00 }, 649 { .page = 0x80, .emulate = spc_emulate_evpd_80 }, 650 { .page = 0x83, .emulate = spc_emulate_evpd_83 }, 651 { .page = 0x86, .emulate = spc_emulate_evpd_86 }, 652 { .page = 0xb0, .emulate = spc_emulate_evpd_b0 }, 653 { .page = 0xb1, .emulate = spc_emulate_evpd_b1 }, 654 { .page = 0xb2, .emulate = spc_emulate_evpd_b2 }, 655 { .page = 0xb3, .emulate = spc_emulate_evpd_b3 }, 656 }; 657 658 /* supported vital product data pages */ 659 static sense_reason_t 660 spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) 661 { 662 int p; 663 664 /* 665 * Only report the INQUIRY EVPD=1 pages after a valid NAA 666 * Registered Extended LUN WWN has been set via ConfigFS 667 * during device creation/restart. 668 */ 669 if (cmd->se_dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { 670 buf[3] = ARRAY_SIZE(evpd_handlers); 671 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) 672 buf[p + 4] = evpd_handlers[p].page; 673 } 674 675 return 0; 676 } 677 678 static sense_reason_t 679 spc_emulate_inquiry(struct se_cmd *cmd) 680 { 681 struct se_device *dev = cmd->se_dev; 682 struct se_portal_group *tpg = cmd->se_lun->lun_tpg; 683 unsigned char *rbuf; 684 unsigned char *cdb = cmd->t_task_cdb; 685 unsigned char *buf; 686 sense_reason_t ret; 687 int p; 688 int len = 0; 689 690 buf = kzalloc(SE_INQUIRY_BUF, GFP_KERNEL); 691 if (!buf) { 692 pr_err("Unable to allocate response buffer for INQUIRY\n"); 693 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 694 } 695 696 if (dev == rcu_access_pointer(tpg->tpg_virt_lun0->lun_se_dev)) 697 buf[0] = 0x3f; /* Not connected */ 698 else 699 buf[0] = dev->transport->get_device_type(dev); 700 701 if (!(cdb[1] & 0x1)) { 702 if (cdb[2]) { 703 pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n", 704 cdb[2]); 705 ret = TCM_INVALID_CDB_FIELD; 706 goto out; 707 } 708 709 ret = spc_emulate_inquiry_std(cmd, buf); 710 len = buf[4] + 5; 711 goto out; 712 } 713 714 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) { 715 if (cdb[2] == evpd_handlers[p].page) { 716 buf[1] = cdb[2]; 717 ret = evpd_handlers[p].emulate(cmd, buf); 718 len = get_unaligned_be16(&buf[2]) + 4; 719 goto out; 720 } 721 } 722 723 pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); 724 ret = TCM_INVALID_CDB_FIELD; 725 726 out: 727 rbuf = transport_kmap_data_sg(cmd); 728 if (rbuf) { 729 memcpy(rbuf, buf, min_t(u32, SE_INQUIRY_BUF, cmd->data_length)); 730 transport_kunmap_data_sg(cmd); 731 } 732 kfree(buf); 733 734 if (!ret) 735 target_complete_cmd_with_length(cmd, GOOD, len); 736 return ret; 737 } 738 739 static int spc_modesense_rwrecovery(struct se_cmd *cmd, u8 pc, u8 *p) 740 { 741 p[0] = 0x01; 742 p[1] = 0x0a; 743 744 /* No changeable values for now */ 745 if (pc == 1) 746 goto out; 747 748 out: 749 return 12; 750 } 751 752 static int spc_modesense_control(struct se_cmd *cmd, u8 pc, u8 *p) 753 { 754 struct se_device *dev = cmd->se_dev; 755 struct se_session *sess = cmd->se_sess; 756 757 p[0] = 0x0a; 758 p[1] = 0x0a; 759 760 /* No changeable values for now */ 761 if (pc == 1) 762 goto out; 763 764 p[2] = 2; 765 /* 766 * From spc4r23, 7.4.7 Control mode page 767 * 768 * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies 769 * restrictions on the algorithm used for reordering commands 770 * having the SIMPLE task attribute (see SAM-4). 771 * 772 * Table 368 -- QUEUE ALGORITHM MODIFIER field 773 * Code Description 774 * 0h Restricted reordering 775 * 1h Unrestricted reordering allowed 776 * 2h to 7h Reserved 777 * 8h to Fh Vendor specific 778 * 779 * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that 780 * the device server shall order the processing sequence of commands 781 * having the SIMPLE task attribute such that data integrity is maintained 782 * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol 783 * requests is halted at any time, the final value of all data observable 784 * on the medium shall be the same as if all the commands had been processed 785 * with the ORDERED task attribute). 786 * 787 * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the 788 * device server may reorder the processing sequence of commands having the 789 * SIMPLE task attribute in any manner. Any data integrity exposures related to 790 * command sequence order shall be explicitly handled by the application client 791 * through the selection of appropriate ommands and task attributes. 792 */ 793 p[3] = (dev->dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; 794 /* 795 * From spc4r17, section 7.4.6 Control mode Page 796 * 797 * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b 798 * 799 * 00b: The logical unit shall clear any unit attention condition 800 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION 801 * status and shall not establish a unit attention condition when a com- 802 * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT 803 * status. 804 * 805 * 10b: The logical unit shall not clear any unit attention condition 806 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION 807 * status and shall not establish a unit attention condition when 808 * a command is completed with BUSY, TASK SET FULL, or RESERVATION 809 * CONFLICT status. 810 * 811 * 11b a The logical unit shall not clear any unit attention condition 812 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION 813 * status and shall establish a unit attention condition for the 814 * initiator port associated with the I_T nexus on which the BUSY, 815 * TASK SET FULL, or RESERVATION CONFLICT status is being returned. 816 * Depending on the status, the additional sense code shall be set to 817 * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS 818 * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE 819 * command, a unit attention condition shall be established only once 820 * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless 821 * to the number of commands completed with one of those status codes. 822 */ 823 p[4] = (dev->dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : 824 (dev->dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; 825 /* 826 * From spc4r17, section 7.4.6 Control mode Page 827 * 828 * Task Aborted Status (TAS) bit set to zero. 829 * 830 * A task aborted status (TAS) bit set to zero specifies that aborted 831 * tasks shall be terminated by the device server without any response 832 * to the application client. A TAS bit set to one specifies that tasks 833 * aborted by the actions of an I_T nexus other than the I_T nexus on 834 * which the command was received shall be completed with TASK ABORTED 835 * status (see SAM-4). 836 */ 837 p[5] = (dev->dev_attrib.emulate_tas) ? 0x40 : 0x00; 838 /* 839 * From spc4r30, section 7.5.7 Control mode page 840 * 841 * Application Tag Owner (ATO) bit set to one. 842 * 843 * If the ATO bit is set to one the device server shall not modify the 844 * LOGICAL BLOCK APPLICATION TAG field and, depending on the protection 845 * type, shall not modify the contents of the LOGICAL BLOCK REFERENCE 846 * TAG field. 847 */ 848 if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) { 849 if (dev->dev_attrib.pi_prot_type || sess->sess_prot_type) 850 p[5] |= 0x80; 851 } 852 853 p[8] = 0xff; 854 p[9] = 0xff; 855 p[11] = 30; 856 857 out: 858 return 12; 859 } 860 861 static int spc_modesense_caching(struct se_cmd *cmd, u8 pc, u8 *p) 862 { 863 struct se_device *dev = cmd->se_dev; 864 865 p[0] = 0x08; 866 p[1] = 0x12; 867 868 /* No changeable values for now */ 869 if (pc == 1) 870 goto out; 871 872 if (target_check_wce(dev)) 873 p[2] = 0x04; /* Write Cache Enable */ 874 p[12] = 0x20; /* Disabled Read Ahead */ 875 876 out: 877 return 20; 878 } 879 880 static int spc_modesense_informational_exceptions(struct se_cmd *cmd, u8 pc, unsigned char *p) 881 { 882 p[0] = 0x1c; 883 p[1] = 0x0a; 884 885 /* No changeable values for now */ 886 if (pc == 1) 887 goto out; 888 889 out: 890 return 12; 891 } 892 893 static struct { 894 uint8_t page; 895 uint8_t subpage; 896 int (*emulate)(struct se_cmd *, u8, unsigned char *); 897 } modesense_handlers[] = { 898 { .page = 0x01, .subpage = 0x00, .emulate = spc_modesense_rwrecovery }, 899 { .page = 0x08, .subpage = 0x00, .emulate = spc_modesense_caching }, 900 { .page = 0x0a, .subpage = 0x00, .emulate = spc_modesense_control }, 901 { .page = 0x1c, .subpage = 0x00, .emulate = spc_modesense_informational_exceptions }, 902 }; 903 904 static void spc_modesense_write_protect(unsigned char *buf, int type) 905 { 906 /* 907 * I believe that the WP bit (bit 7) in the mode header is the same for 908 * all device types.. 909 */ 910 switch (type) { 911 case TYPE_DISK: 912 case TYPE_TAPE: 913 default: 914 buf[0] |= 0x80; /* WP bit */ 915 break; 916 } 917 } 918 919 static void spc_modesense_dpofua(unsigned char *buf, int type) 920 { 921 switch (type) { 922 case TYPE_DISK: 923 buf[0] |= 0x10; /* DPOFUA bit */ 924 break; 925 default: 926 break; 927 } 928 } 929 930 static int spc_modesense_blockdesc(unsigned char *buf, u64 blocks, u32 block_size) 931 { 932 *buf++ = 8; 933 put_unaligned_be32(min(blocks, 0xffffffffull), buf); 934 buf += 4; 935 put_unaligned_be32(block_size, buf); 936 return 9; 937 } 938 939 static int spc_modesense_long_blockdesc(unsigned char *buf, u64 blocks, u32 block_size) 940 { 941 if (blocks <= 0xffffffff) 942 return spc_modesense_blockdesc(buf + 3, blocks, block_size) + 3; 943 944 *buf++ = 1; /* LONGLBA */ 945 buf += 2; 946 *buf++ = 16; 947 put_unaligned_be64(blocks, buf); 948 buf += 12; 949 put_unaligned_be32(block_size, buf); 950 951 return 17; 952 } 953 954 static sense_reason_t spc_emulate_modesense(struct se_cmd *cmd) 955 { 956 struct se_device *dev = cmd->se_dev; 957 char *cdb = cmd->t_task_cdb; 958 unsigned char buf[SE_MODE_PAGE_BUF], *rbuf; 959 int type = dev->transport->get_device_type(dev); 960 int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10); 961 bool dbd = !!(cdb[1] & 0x08); 962 bool llba = ten ? !!(cdb[1] & 0x10) : false; 963 u8 pc = cdb[2] >> 6; 964 u8 page = cdb[2] & 0x3f; 965 u8 subpage = cdb[3]; 966 int length = 0; 967 int ret; 968 int i; 969 bool read_only = target_lun_is_rdonly(cmd);; 970 971 memset(buf, 0, SE_MODE_PAGE_BUF); 972 973 /* 974 * Skip over MODE DATA LENGTH + MEDIUM TYPE fields to byte 3 for 975 * MODE_SENSE_10 and byte 2 for MODE_SENSE (6). 976 */ 977 length = ten ? 3 : 2; 978 979 /* DEVICE-SPECIFIC PARAMETER */ 980 if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || read_only) 981 spc_modesense_write_protect(&buf[length], type); 982 983 /* 984 * SBC only allows us to enable FUA and DPO together. Fortunately 985 * DPO is explicitly specified as a hint, so a noop is a perfectly 986 * valid implementation. 987 */ 988 if (target_check_fua(dev)) 989 spc_modesense_dpofua(&buf[length], type); 990 991 ++length; 992 993 /* BLOCK DESCRIPTOR */ 994 995 /* 996 * For now we only include a block descriptor for disk (SBC) 997 * devices; other command sets use a slightly different format. 998 */ 999 if (!dbd && type == TYPE_DISK) { 1000 u64 blocks = dev->transport->get_blocks(dev); 1001 u32 block_size = dev->dev_attrib.block_size; 1002 1003 if (ten) { 1004 if (llba) { 1005 length += spc_modesense_long_blockdesc(&buf[length], 1006 blocks, block_size); 1007 } else { 1008 length += 3; 1009 length += spc_modesense_blockdesc(&buf[length], 1010 blocks, block_size); 1011 } 1012 } else { 1013 length += spc_modesense_blockdesc(&buf[length], blocks, 1014 block_size); 1015 } 1016 } else { 1017 if (ten) 1018 length += 4; 1019 else 1020 length += 1; 1021 } 1022 1023 if (page == 0x3f) { 1024 if (subpage != 0x00 && subpage != 0xff) { 1025 pr_warn("MODE_SENSE: Invalid subpage code: 0x%02x\n", subpage); 1026 return TCM_INVALID_CDB_FIELD; 1027 } 1028 1029 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) { 1030 /* 1031 * Tricky way to say all subpage 00h for 1032 * subpage==0, all subpages for subpage==0xff 1033 * (and we just checked above that those are 1034 * the only two possibilities). 1035 */ 1036 if ((modesense_handlers[i].subpage & ~subpage) == 0) { 1037 ret = modesense_handlers[i].emulate(cmd, pc, &buf[length]); 1038 if (!ten && length + ret >= 255) 1039 break; 1040 length += ret; 1041 } 1042 } 1043 1044 goto set_length; 1045 } 1046 1047 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) 1048 if (modesense_handlers[i].page == page && 1049 modesense_handlers[i].subpage == subpage) { 1050 length += modesense_handlers[i].emulate(cmd, pc, &buf[length]); 1051 goto set_length; 1052 } 1053 1054 /* 1055 * We don't intend to implement: 1056 * - obsolete page 03h "format parameters" (checked by Solaris) 1057 */ 1058 if (page != 0x03) 1059 pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", 1060 page, subpage); 1061 1062 return TCM_UNKNOWN_MODE_PAGE; 1063 1064 set_length: 1065 if (ten) 1066 put_unaligned_be16(length - 2, buf); 1067 else 1068 buf[0] = length - 1; 1069 1070 rbuf = transport_kmap_data_sg(cmd); 1071 if (rbuf) { 1072 memcpy(rbuf, buf, min_t(u32, SE_MODE_PAGE_BUF, cmd->data_length)); 1073 transport_kunmap_data_sg(cmd); 1074 } 1075 1076 target_complete_cmd_with_length(cmd, GOOD, length); 1077 return 0; 1078 } 1079 1080 static sense_reason_t spc_emulate_modeselect(struct se_cmd *cmd) 1081 { 1082 char *cdb = cmd->t_task_cdb; 1083 bool ten = cdb[0] == MODE_SELECT_10; 1084 int off = ten ? 8 : 4; 1085 bool pf = !!(cdb[1] & 0x10); 1086 u8 page, subpage; 1087 unsigned char *buf; 1088 unsigned char tbuf[SE_MODE_PAGE_BUF]; 1089 int length; 1090 sense_reason_t ret = 0; 1091 int i; 1092 1093 if (!cmd->data_length) { 1094 target_complete_cmd(cmd, GOOD); 1095 return 0; 1096 } 1097 1098 if (cmd->data_length < off + 2) 1099 return TCM_PARAMETER_LIST_LENGTH_ERROR; 1100 1101 buf = transport_kmap_data_sg(cmd); 1102 if (!buf) 1103 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1104 1105 if (!pf) { 1106 ret = TCM_INVALID_CDB_FIELD; 1107 goto out; 1108 } 1109 1110 page = buf[off] & 0x3f; 1111 subpage = buf[off] & 0x40 ? buf[off + 1] : 0; 1112 1113 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) 1114 if (modesense_handlers[i].page == page && 1115 modesense_handlers[i].subpage == subpage) { 1116 memset(tbuf, 0, SE_MODE_PAGE_BUF); 1117 length = modesense_handlers[i].emulate(cmd, 0, tbuf); 1118 goto check_contents; 1119 } 1120 1121 ret = TCM_UNKNOWN_MODE_PAGE; 1122 goto out; 1123 1124 check_contents: 1125 if (cmd->data_length < off + length) { 1126 ret = TCM_PARAMETER_LIST_LENGTH_ERROR; 1127 goto out; 1128 } 1129 1130 if (memcmp(buf + off, tbuf, length)) 1131 ret = TCM_INVALID_PARAMETER_LIST; 1132 1133 out: 1134 transport_kunmap_data_sg(cmd); 1135 1136 if (!ret) 1137 target_complete_cmd(cmd, GOOD); 1138 return ret; 1139 } 1140 1141 static sense_reason_t spc_emulate_request_sense(struct se_cmd *cmd) 1142 { 1143 unsigned char *cdb = cmd->t_task_cdb; 1144 unsigned char *rbuf; 1145 u8 ua_asc = 0, ua_ascq = 0; 1146 unsigned char buf[SE_SENSE_BUF]; 1147 1148 memset(buf, 0, SE_SENSE_BUF); 1149 1150 if (cdb[1] & 0x01) { 1151 pr_err("REQUEST_SENSE description emulation not" 1152 " supported\n"); 1153 return TCM_INVALID_CDB_FIELD; 1154 } 1155 1156 rbuf = transport_kmap_data_sg(cmd); 1157 if (!rbuf) 1158 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1159 1160 if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) { 1161 /* 1162 * CURRENT ERROR, UNIT ATTENTION 1163 */ 1164 buf[0] = 0x70; 1165 buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; 1166 1167 /* 1168 * The Additional Sense Code (ASC) from the UNIT ATTENTION 1169 */ 1170 buf[SPC_ASC_KEY_OFFSET] = ua_asc; 1171 buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; 1172 buf[7] = 0x0A; 1173 } else { 1174 /* 1175 * CURRENT ERROR, NO SENSE 1176 */ 1177 buf[0] = 0x70; 1178 buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; 1179 1180 /* 1181 * NO ADDITIONAL SENSE INFORMATION 1182 */ 1183 buf[SPC_ASC_KEY_OFFSET] = 0x00; 1184 buf[7] = 0x0A; 1185 } 1186 1187 memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length)); 1188 transport_kunmap_data_sg(cmd); 1189 1190 target_complete_cmd(cmd, GOOD); 1191 return 0; 1192 } 1193 1194 sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd) 1195 { 1196 struct se_dev_entry *deve; 1197 struct se_session *sess = cmd->se_sess; 1198 struct se_node_acl *nacl; 1199 unsigned char *buf; 1200 u32 lun_count = 0, offset = 8; 1201 1202 if (cmd->data_length < 16) { 1203 pr_warn("REPORT LUNS allocation length %u too small\n", 1204 cmd->data_length); 1205 return TCM_INVALID_CDB_FIELD; 1206 } 1207 1208 buf = transport_kmap_data_sg(cmd); 1209 if (!buf) 1210 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1211 1212 /* 1213 * If no struct se_session pointer is present, this struct se_cmd is 1214 * coming via a target_core_mod PASSTHROUGH op, and not through 1215 * a $FABRIC_MOD. In that case, report LUN=0 only. 1216 */ 1217 if (!sess) { 1218 int_to_scsilun(0, (struct scsi_lun *)&buf[offset]); 1219 lun_count = 1; 1220 goto done; 1221 } 1222 nacl = sess->se_node_acl; 1223 1224 rcu_read_lock(); 1225 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) { 1226 /* 1227 * We determine the correct LUN LIST LENGTH even once we 1228 * have reached the initial allocation length. 1229 * See SPC2-R20 7.19. 1230 */ 1231 lun_count++; 1232 if ((offset + 8) > cmd->data_length) 1233 continue; 1234 1235 int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]); 1236 offset += 8; 1237 } 1238 rcu_read_unlock(); 1239 1240 /* 1241 * See SPC3 r07, page 159. 1242 */ 1243 done: 1244 lun_count *= 8; 1245 buf[0] = ((lun_count >> 24) & 0xff); 1246 buf[1] = ((lun_count >> 16) & 0xff); 1247 buf[2] = ((lun_count >> 8) & 0xff); 1248 buf[3] = (lun_count & 0xff); 1249 transport_kunmap_data_sg(cmd); 1250 1251 target_complete_cmd_with_length(cmd, GOOD, 8 + lun_count * 8); 1252 return 0; 1253 } 1254 EXPORT_SYMBOL(spc_emulate_report_luns); 1255 1256 static sense_reason_t 1257 spc_emulate_testunitready(struct se_cmd *cmd) 1258 { 1259 target_complete_cmd(cmd, GOOD); 1260 return 0; 1261 } 1262 1263 sense_reason_t 1264 spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) 1265 { 1266 struct se_device *dev = cmd->se_dev; 1267 unsigned char *cdb = cmd->t_task_cdb; 1268 1269 switch (cdb[0]) { 1270 case MODE_SELECT: 1271 *size = cdb[4]; 1272 cmd->execute_cmd = spc_emulate_modeselect; 1273 break; 1274 case MODE_SELECT_10: 1275 *size = (cdb[7] << 8) + cdb[8]; 1276 cmd->execute_cmd = spc_emulate_modeselect; 1277 break; 1278 case MODE_SENSE: 1279 *size = cdb[4]; 1280 cmd->execute_cmd = spc_emulate_modesense; 1281 break; 1282 case MODE_SENSE_10: 1283 *size = (cdb[7] << 8) + cdb[8]; 1284 cmd->execute_cmd = spc_emulate_modesense; 1285 break; 1286 case LOG_SELECT: 1287 case LOG_SENSE: 1288 *size = (cdb[7] << 8) + cdb[8]; 1289 break; 1290 case PERSISTENT_RESERVE_IN: 1291 *size = (cdb[7] << 8) + cdb[8]; 1292 cmd->execute_cmd = target_scsi3_emulate_pr_in; 1293 break; 1294 case PERSISTENT_RESERVE_OUT: 1295 *size = (cdb[7] << 8) + cdb[8]; 1296 cmd->execute_cmd = target_scsi3_emulate_pr_out; 1297 break; 1298 case RELEASE: 1299 case RELEASE_10: 1300 if (cdb[0] == RELEASE_10) 1301 *size = (cdb[7] << 8) | cdb[8]; 1302 else 1303 *size = cmd->data_length; 1304 1305 cmd->execute_cmd = target_scsi2_reservation_release; 1306 break; 1307 case RESERVE: 1308 case RESERVE_10: 1309 /* 1310 * The SPC-2 RESERVE does not contain a size in the SCSI CDB. 1311 * Assume the passthrough or $FABRIC_MOD will tell us about it. 1312 */ 1313 if (cdb[0] == RESERVE_10) 1314 *size = (cdb[7] << 8) | cdb[8]; 1315 else 1316 *size = cmd->data_length; 1317 1318 cmd->execute_cmd = target_scsi2_reservation_reserve; 1319 break; 1320 case REQUEST_SENSE: 1321 *size = cdb[4]; 1322 cmd->execute_cmd = spc_emulate_request_sense; 1323 break; 1324 case INQUIRY: 1325 *size = (cdb[3] << 8) + cdb[4]; 1326 1327 /* 1328 * Do implicit HEAD_OF_QUEUE processing for INQUIRY. 1329 * See spc4r17 section 5.3 1330 */ 1331 cmd->sam_task_attr = TCM_HEAD_TAG; 1332 cmd->execute_cmd = spc_emulate_inquiry; 1333 break; 1334 case SECURITY_PROTOCOL_IN: 1335 case SECURITY_PROTOCOL_OUT: 1336 *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; 1337 break; 1338 case EXTENDED_COPY: 1339 *size = get_unaligned_be32(&cdb[10]); 1340 cmd->execute_cmd = target_do_xcopy; 1341 break; 1342 case RECEIVE_COPY_RESULTS: 1343 *size = get_unaligned_be32(&cdb[10]); 1344 cmd->execute_cmd = target_do_receive_copy_results; 1345 break; 1346 case READ_ATTRIBUTE: 1347 case WRITE_ATTRIBUTE: 1348 *size = (cdb[10] << 24) | (cdb[11] << 16) | 1349 (cdb[12] << 8) | cdb[13]; 1350 break; 1351 case RECEIVE_DIAGNOSTIC: 1352 case SEND_DIAGNOSTIC: 1353 *size = (cdb[3] << 8) | cdb[4]; 1354 break; 1355 case WRITE_BUFFER: 1356 *size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; 1357 break; 1358 case REPORT_LUNS: 1359 cmd->execute_cmd = spc_emulate_report_luns; 1360 *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; 1361 /* 1362 * Do implicit HEAD_OF_QUEUE processing for REPORT_LUNS 1363 * See spc4r17 section 5.3 1364 */ 1365 cmd->sam_task_attr = TCM_HEAD_TAG; 1366 break; 1367 case TEST_UNIT_READY: 1368 cmd->execute_cmd = spc_emulate_testunitready; 1369 *size = 0; 1370 break; 1371 case MAINTENANCE_IN: 1372 if (dev->transport->get_device_type(dev) != TYPE_ROM) { 1373 /* 1374 * MAINTENANCE_IN from SCC-2 1375 * Check for emulated MI_REPORT_TARGET_PGS 1376 */ 1377 if ((cdb[1] & 0x1f) == MI_REPORT_TARGET_PGS) { 1378 cmd->execute_cmd = 1379 target_emulate_report_target_port_groups; 1380 } 1381 *size = get_unaligned_be32(&cdb[6]); 1382 } else { 1383 /* 1384 * GPCMD_SEND_KEY from multi media commands 1385 */ 1386 *size = get_unaligned_be16(&cdb[8]); 1387 } 1388 break; 1389 case MAINTENANCE_OUT: 1390 if (dev->transport->get_device_type(dev) != TYPE_ROM) { 1391 /* 1392 * MAINTENANCE_OUT from SCC-2 1393 * Check for emulated MO_SET_TARGET_PGS. 1394 */ 1395 if (cdb[1] == MO_SET_TARGET_PGS) { 1396 cmd->execute_cmd = 1397 target_emulate_set_target_port_groups; 1398 } 1399 *size = get_unaligned_be32(&cdb[6]); 1400 } else { 1401 /* 1402 * GPCMD_SEND_KEY from multi media commands 1403 */ 1404 *size = get_unaligned_be16(&cdb[8]); 1405 } 1406 break; 1407 default: 1408 pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode" 1409 " 0x%02x, sending CHECK_CONDITION.\n", 1410 cmd->se_tfo->get_fabric_name(), cdb[0]); 1411 return TCM_UNSUPPORTED_SCSI_OPCODE; 1412 } 1413 1414 return 0; 1415 } 1416 EXPORT_SYMBOL(spc_parse_cdb); 1417