1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * SCSI Primary Commands (SPC) parsing and emulation. 4 * 5 * (c) Copyright 2002-2013 Datera, Inc. 6 * 7 * Nicholas A. Bellinger <nab@kernel.org> 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/module.h> 12 #include <asm/unaligned.h> 13 14 #include <scsi/scsi_proto.h> 15 #include <scsi/scsi_common.h> 16 #include <scsi/scsi_tcq.h> 17 18 #include <target/target_core_base.h> 19 #include <target/target_core_backend.h> 20 #include <target/target_core_fabric.h> 21 22 #include "target_core_internal.h" 23 #include "target_core_alua.h" 24 #include "target_core_pr.h" 25 #include "target_core_ua.h" 26 #include "target_core_xcopy.h" 27 28 static void spc_fill_alua_data(struct se_lun *lun, unsigned char *buf) 29 { 30 struct t10_alua_tg_pt_gp *tg_pt_gp; 31 32 /* 33 * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS. 34 */ 35 buf[5] = 0x80; 36 37 /* 38 * Set TPGS field for explicit and/or implicit ALUA access type 39 * and opteration. 40 * 41 * See spc4r17 section 6.4.2 Table 135 42 */ 43 rcu_read_lock(); 44 tg_pt_gp = rcu_dereference(lun->lun_tg_pt_gp); 45 if (tg_pt_gp) 46 buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; 47 rcu_read_unlock(); 48 } 49 50 static u16 51 spc_find_scsi_transport_vd(int proto_id) 52 { 53 switch (proto_id) { 54 case SCSI_PROTOCOL_FCP: 55 return SCSI_VERSION_DESCRIPTOR_FCP4; 56 case SCSI_PROTOCOL_ISCSI: 57 return SCSI_VERSION_DESCRIPTOR_ISCSI; 58 case SCSI_PROTOCOL_SAS: 59 return SCSI_VERSION_DESCRIPTOR_SAS3; 60 case SCSI_PROTOCOL_SBP: 61 return SCSI_VERSION_DESCRIPTOR_SBP3; 62 case SCSI_PROTOCOL_SRP: 63 return SCSI_VERSION_DESCRIPTOR_SRP; 64 default: 65 pr_warn("Cannot find VERSION DESCRIPTOR value for unknown SCSI" 66 " transport PROTOCOL IDENTIFIER %#x\n", proto_id); 67 return 0; 68 } 69 } 70 71 sense_reason_t 72 spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char *buf) 73 { 74 struct se_lun *lun = cmd->se_lun; 75 struct se_portal_group *tpg = lun->lun_tpg; 76 struct se_device *dev = cmd->se_dev; 77 struct se_session *sess = cmd->se_sess; 78 79 /* Set RMB (removable media) for tape devices */ 80 if (dev->transport->get_device_type(dev) == TYPE_TAPE) 81 buf[1] = 0x80; 82 83 buf[2] = 0x06; /* SPC-4 */ 84 85 /* 86 * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2 87 * 88 * SPC4 says: 89 * A RESPONSE DATA FORMAT field set to 2h indicates that the 90 * standard INQUIRY data is in the format defined in this 91 * standard. Response data format values less than 2h are 92 * obsolete. Response data format values greater than 2h are 93 * reserved. 94 */ 95 buf[3] = 2; 96 97 /* 98 * Enable SCCS and TPGS fields for Emulated ALUA 99 */ 100 spc_fill_alua_data(lun, buf); 101 102 /* 103 * Set Third-Party Copy (3PC) bit to indicate support for EXTENDED_COPY 104 */ 105 if (dev->dev_attrib.emulate_3pc) 106 buf[5] |= 0x8; 107 /* 108 * Set Protection (PROTECT) bit when DIF has been enabled on the 109 * device, and the fabric supports VERIFY + PASS. Also report 110 * PROTECT=1 if sess_prot_type has been configured to allow T10-PI 111 * to unprotected devices. 112 */ 113 if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) { 114 if (dev->dev_attrib.pi_prot_type || cmd->se_sess->sess_prot_type) 115 buf[5] |= 0x1; 116 } 117 118 /* 119 * Set MULTIP bit to indicate presence of multiple SCSI target ports 120 */ 121 if (dev->export_count > 1) 122 buf[6] |= 0x10; 123 124 buf[7] = 0x2; /* CmdQue=1 */ 125 126 /* 127 * ASCII data fields described as being left-aligned shall have any 128 * unused bytes at the end of the field (i.e., highest offset) and the 129 * unused bytes shall be filled with ASCII space characters (20h). 130 */ 131 memset(&buf[8], 0x20, 132 INQUIRY_VENDOR_LEN + INQUIRY_MODEL_LEN + INQUIRY_REVISION_LEN); 133 memcpy(&buf[8], dev->t10_wwn.vendor, 134 strnlen(dev->t10_wwn.vendor, INQUIRY_VENDOR_LEN)); 135 memcpy(&buf[16], dev->t10_wwn.model, 136 strnlen(dev->t10_wwn.model, INQUIRY_MODEL_LEN)); 137 memcpy(&buf[32], dev->t10_wwn.revision, 138 strnlen(dev->t10_wwn.revision, INQUIRY_REVISION_LEN)); 139 140 /* 141 * Set the VERSION DESCRIPTOR fields 142 */ 143 put_unaligned_be16(SCSI_VERSION_DESCRIPTOR_SAM5, &buf[58]); 144 put_unaligned_be16(spc_find_scsi_transport_vd(tpg->proto_id), &buf[60]); 145 put_unaligned_be16(SCSI_VERSION_DESCRIPTOR_SPC4, &buf[62]); 146 if (cmd->se_dev->transport->get_device_type(dev) == TYPE_DISK) 147 put_unaligned_be16(SCSI_VERSION_DESCRIPTOR_SBC3, &buf[64]); 148 149 buf[4] = 91; /* Set additional length to 91 */ 150 151 return 0; 152 } 153 EXPORT_SYMBOL(spc_emulate_inquiry_std); 154 155 /* unit serial number */ 156 static sense_reason_t 157 spc_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) 158 { 159 struct se_device *dev = cmd->se_dev; 160 u16 len; 161 162 if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { 163 len = sprintf(&buf[4], "%s", dev->t10_wwn.unit_serial); 164 len++; /* Extra Byte for NULL Terminator */ 165 buf[3] = len; 166 } 167 return 0; 168 } 169 170 /* 171 * Generate NAA IEEE Registered Extended designator 172 */ 173 void spc_gen_naa_6h_vendor_specific(struct se_device *dev, 174 unsigned char *buf) 175 { 176 unsigned char *p = &dev->t10_wwn.unit_serial[0]; 177 u32 company_id = dev->t10_wwn.company_id; 178 int cnt, off = 0; 179 bool next = true; 180 181 /* 182 * Start NAA IEEE Registered Extended Identifier/Designator 183 */ 184 buf[off] = 0x6 << 4; 185 186 /* IEEE COMPANY_ID */ 187 buf[off++] |= (company_id >> 20) & 0xf; 188 buf[off++] = (company_id >> 12) & 0xff; 189 buf[off++] = (company_id >> 4) & 0xff; 190 buf[off] = (company_id & 0xf) << 4; 191 192 /* 193 * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on 194 * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field 195 * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION 196 * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL 197 * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure 198 * per device uniqeness. 199 */ 200 for (cnt = off + 13; *p && off < cnt; p++) { 201 int val = hex_to_bin(*p); 202 203 if (val < 0) 204 continue; 205 206 if (next) { 207 next = false; 208 buf[off++] |= val; 209 } else { 210 next = true; 211 buf[off] = val << 4; 212 } 213 } 214 } 215 216 /* 217 * Device identification VPD, for a complete list of 218 * DESIGNATOR TYPEs see spc4r17 Table 459. 219 */ 220 sense_reason_t 221 spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) 222 { 223 struct se_device *dev = cmd->se_dev; 224 struct se_lun *lun = cmd->se_lun; 225 struct se_portal_group *tpg = NULL; 226 struct t10_alua_lu_gp_member *lu_gp_mem; 227 struct t10_alua_tg_pt_gp *tg_pt_gp; 228 unsigned char *prod = &dev->t10_wwn.model[0]; 229 u32 prod_len; 230 u32 off = 0; 231 u16 len = 0, id_len; 232 233 off = 4; 234 235 /* 236 * NAA IEEE Registered Extended Assigned designator format, see 237 * spc4r17 section 7.7.3.6.5 238 * 239 * We depend upon a target_core_mod/ConfigFS provided 240 * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial 241 * value in order to return the NAA id. 242 */ 243 if (!(dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL)) 244 goto check_t10_vend_desc; 245 246 /* CODE SET == Binary */ 247 buf[off++] = 0x1; 248 249 /* Set ASSOCIATION == addressed logical unit: 0)b */ 250 buf[off] = 0x00; 251 252 /* Identifier/Designator type == NAA identifier */ 253 buf[off++] |= 0x3; 254 off++; 255 256 /* Identifier/Designator length */ 257 buf[off++] = 0x10; 258 259 /* NAA IEEE Registered Extended designator */ 260 spc_gen_naa_6h_vendor_specific(dev, &buf[off]); 261 262 len = 20; 263 off = (len + 4); 264 265 check_t10_vend_desc: 266 /* 267 * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 268 */ 269 id_len = 8; /* For Vendor field */ 270 prod_len = 4; /* For VPD Header */ 271 prod_len += 8; /* For Vendor field */ 272 prod_len += strlen(prod); 273 prod_len++; /* For : */ 274 275 if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) 276 id_len += sprintf(&buf[off+12], "%s:%s", prod, 277 &dev->t10_wwn.unit_serial[0]); 278 buf[off] = 0x2; /* ASCII */ 279 buf[off+1] = 0x1; /* T10 Vendor ID */ 280 buf[off+2] = 0x0; 281 /* left align Vendor ID and pad with spaces */ 282 memset(&buf[off+4], 0x20, INQUIRY_VENDOR_LEN); 283 memcpy(&buf[off+4], dev->t10_wwn.vendor, 284 strnlen(dev->t10_wwn.vendor, INQUIRY_VENDOR_LEN)); 285 /* Extra Byte for NULL Terminator */ 286 id_len++; 287 /* Identifier Length */ 288 buf[off+3] = id_len; 289 /* Header size for Designation descriptor */ 290 len += (id_len + 4); 291 off += (id_len + 4); 292 293 if (1) { 294 struct t10_alua_lu_gp *lu_gp; 295 u32 padding, scsi_name_len, scsi_target_len; 296 u16 lu_gp_id = 0; 297 u16 tg_pt_gp_id = 0; 298 u16 tpgt; 299 300 tpg = lun->lun_tpg; 301 /* 302 * Relative target port identifer, see spc4r17 303 * section 7.7.3.7 304 * 305 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 306 * section 7.5.1 Table 362 307 */ 308 buf[off] = tpg->proto_id << 4; 309 buf[off++] |= 0x1; /* CODE SET == Binary */ 310 buf[off] = 0x80; /* Set PIV=1 */ 311 /* Set ASSOCIATION == target port: 01b */ 312 buf[off] |= 0x10; 313 /* DESIGNATOR TYPE == Relative target port identifer */ 314 buf[off++] |= 0x4; 315 off++; /* Skip over Reserved */ 316 buf[off++] = 4; /* DESIGNATOR LENGTH */ 317 /* Skip over Obsolete field in RTPI payload 318 * in Table 472 */ 319 off += 2; 320 put_unaligned_be16(lun->lun_rtpi, &buf[off]); 321 off += 2; 322 len += 8; /* Header size + Designation descriptor */ 323 /* 324 * Target port group identifier, see spc4r17 325 * section 7.7.3.8 326 * 327 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 328 * section 7.5.1 Table 362 329 */ 330 rcu_read_lock(); 331 tg_pt_gp = rcu_dereference(lun->lun_tg_pt_gp); 332 if (!tg_pt_gp) { 333 rcu_read_unlock(); 334 goto check_lu_gp; 335 } 336 tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; 337 rcu_read_unlock(); 338 339 buf[off] = tpg->proto_id << 4; 340 buf[off++] |= 0x1; /* CODE SET == Binary */ 341 buf[off] = 0x80; /* Set PIV=1 */ 342 /* Set ASSOCIATION == target port: 01b */ 343 buf[off] |= 0x10; 344 /* DESIGNATOR TYPE == Target port group identifier */ 345 buf[off++] |= 0x5; 346 off++; /* Skip over Reserved */ 347 buf[off++] = 4; /* DESIGNATOR LENGTH */ 348 off += 2; /* Skip over Reserved Field */ 349 put_unaligned_be16(tg_pt_gp_id, &buf[off]); 350 off += 2; 351 len += 8; /* Header size + Designation descriptor */ 352 /* 353 * Logical Unit Group identifier, see spc4r17 354 * section 7.7.3.8 355 */ 356 check_lu_gp: 357 lu_gp_mem = dev->dev_alua_lu_gp_mem; 358 if (!lu_gp_mem) 359 goto check_scsi_name; 360 361 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 362 lu_gp = lu_gp_mem->lu_gp; 363 if (!lu_gp) { 364 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 365 goto check_scsi_name; 366 } 367 lu_gp_id = lu_gp->lu_gp_id; 368 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 369 370 buf[off++] |= 0x1; /* CODE SET == Binary */ 371 /* DESIGNATOR TYPE == Logical Unit Group identifier */ 372 buf[off++] |= 0x6; 373 off++; /* Skip over Reserved */ 374 buf[off++] = 4; /* DESIGNATOR LENGTH */ 375 off += 2; /* Skip over Reserved Field */ 376 put_unaligned_be16(lu_gp_id, &buf[off]); 377 off += 2; 378 len += 8; /* Header size + Designation descriptor */ 379 /* 380 * SCSI name string designator, see spc4r17 381 * section 7.7.3.11 382 * 383 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 384 * section 7.5.1 Table 362 385 */ 386 check_scsi_name: 387 buf[off] = tpg->proto_id << 4; 388 buf[off++] |= 0x3; /* CODE SET == UTF-8 */ 389 buf[off] = 0x80; /* Set PIV=1 */ 390 /* Set ASSOCIATION == target port: 01b */ 391 buf[off] |= 0x10; 392 /* DESIGNATOR TYPE == SCSI name string */ 393 buf[off++] |= 0x8; 394 off += 2; /* Skip over Reserved and length */ 395 /* 396 * SCSI name string identifer containing, $FABRIC_MOD 397 * dependent information. For LIO-Target and iSCSI 398 * Target Port, this means "<iSCSI name>,t,0x<TPGT> in 399 * UTF-8 encoding. 400 */ 401 tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); 402 scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", 403 tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); 404 scsi_name_len += 1 /* Include NULL terminator */; 405 /* 406 * The null-terminated, null-padded (see 4.4.2) SCSI 407 * NAME STRING field contains a UTF-8 format string. 408 * The number of bytes in the SCSI NAME STRING field 409 * (i.e., the value in the DESIGNATOR LENGTH field) 410 * shall be no larger than 256 and shall be a multiple 411 * of four. 412 */ 413 padding = ((-scsi_name_len) & 3); 414 if (padding) 415 scsi_name_len += padding; 416 if (scsi_name_len > 256) 417 scsi_name_len = 256; 418 419 buf[off-1] = scsi_name_len; 420 off += scsi_name_len; 421 /* Header size + Designation descriptor */ 422 len += (scsi_name_len + 4); 423 424 /* 425 * Target device designator 426 */ 427 buf[off] = tpg->proto_id << 4; 428 buf[off++] |= 0x3; /* CODE SET == UTF-8 */ 429 buf[off] = 0x80; /* Set PIV=1 */ 430 /* Set ASSOCIATION == target device: 10b */ 431 buf[off] |= 0x20; 432 /* DESIGNATOR TYPE == SCSI name string */ 433 buf[off++] |= 0x8; 434 off += 2; /* Skip over Reserved and length */ 435 /* 436 * SCSI name string identifer containing, $FABRIC_MOD 437 * dependent information. For LIO-Target and iSCSI 438 * Target Port, this means "<iSCSI name>" in 439 * UTF-8 encoding. 440 */ 441 scsi_target_len = sprintf(&buf[off], "%s", 442 tpg->se_tpg_tfo->tpg_get_wwn(tpg)); 443 scsi_target_len += 1 /* Include NULL terminator */; 444 /* 445 * The null-terminated, null-padded (see 4.4.2) SCSI 446 * NAME STRING field contains a UTF-8 format string. 447 * The number of bytes in the SCSI NAME STRING field 448 * (i.e., the value in the DESIGNATOR LENGTH field) 449 * shall be no larger than 256 and shall be a multiple 450 * of four. 451 */ 452 padding = ((-scsi_target_len) & 3); 453 if (padding) 454 scsi_target_len += padding; 455 if (scsi_target_len > 256) 456 scsi_target_len = 256; 457 458 buf[off-1] = scsi_target_len; 459 off += scsi_target_len; 460 461 /* Header size + Designation descriptor */ 462 len += (scsi_target_len + 4); 463 } 464 put_unaligned_be16(len, &buf[2]); /* Page Length for VPD 0x83 */ 465 return 0; 466 } 467 EXPORT_SYMBOL(spc_emulate_evpd_83); 468 469 /* Extended INQUIRY Data VPD Page */ 470 static sense_reason_t 471 spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) 472 { 473 struct se_device *dev = cmd->se_dev; 474 struct se_session *sess = cmd->se_sess; 475 476 buf[3] = 0x3c; 477 /* 478 * Set GRD_CHK + REF_CHK for TYPE1 protection, or GRD_CHK 479 * only for TYPE3 protection. 480 */ 481 if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) { 482 if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE1_PROT || 483 cmd->se_sess->sess_prot_type == TARGET_DIF_TYPE1_PROT) 484 buf[4] = 0x5; 485 else if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE3_PROT || 486 cmd->se_sess->sess_prot_type == TARGET_DIF_TYPE3_PROT) 487 buf[4] = 0x4; 488 } 489 490 /* logical unit supports type 1 and type 3 protection */ 491 if ((dev->transport->get_device_type(dev) == TYPE_DISK) && 492 (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) && 493 (dev->dev_attrib.pi_prot_type || cmd->se_sess->sess_prot_type)) { 494 buf[4] |= (0x3 << 3); 495 } 496 497 /* Set HEADSUP, ORDSUP, SIMPSUP */ 498 buf[5] = 0x07; 499 500 /* If WriteCache emulation is enabled, set V_SUP */ 501 if (target_check_wce(dev)) 502 buf[6] = 0x01; 503 /* If an LBA map is present set R_SUP */ 504 spin_lock(&cmd->se_dev->t10_alua.lba_map_lock); 505 if (!list_empty(&dev->t10_alua.lba_map_list)) 506 buf[8] = 0x10; 507 spin_unlock(&cmd->se_dev->t10_alua.lba_map_lock); 508 return 0; 509 } 510 511 /* Block Limits VPD page */ 512 static sense_reason_t 513 spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) 514 { 515 struct se_device *dev = cmd->se_dev; 516 u32 mtl = 0; 517 int have_tp = 0, opt, min; 518 u32 io_max_blocks; 519 520 /* 521 * Following spc3r22 section 6.5.3 Block Limits VPD page, when 522 * emulate_tpu=1 or emulate_tpws=1 we will be expect a 523 * different page length for Thin Provisioning. 524 */ 525 if (dev->dev_attrib.emulate_tpu || dev->dev_attrib.emulate_tpws) 526 have_tp = 1; 527 528 buf[0] = dev->transport->get_device_type(dev); 529 buf[3] = have_tp ? 0x3c : 0x10; 530 531 /* Set WSNZ to 1 */ 532 buf[4] = 0x01; 533 /* 534 * Set MAXIMUM COMPARE AND WRITE LENGTH 535 */ 536 if (dev->dev_attrib.emulate_caw) 537 buf[5] = 0x01; 538 539 /* 540 * Set OPTIMAL TRANSFER LENGTH GRANULARITY 541 */ 542 if (dev->transport->get_io_min && (min = dev->transport->get_io_min(dev))) 543 put_unaligned_be16(min / dev->dev_attrib.block_size, &buf[6]); 544 else 545 put_unaligned_be16(1, &buf[6]); 546 547 /* 548 * Set MAXIMUM TRANSFER LENGTH 549 * 550 * XXX: Currently assumes single PAGE_SIZE per scatterlist for fabrics 551 * enforcing maximum HW scatter-gather-list entry limit 552 */ 553 if (cmd->se_tfo->max_data_sg_nents) { 554 mtl = (cmd->se_tfo->max_data_sg_nents * PAGE_SIZE) / 555 dev->dev_attrib.block_size; 556 } 557 io_max_blocks = mult_frac(dev->dev_attrib.hw_max_sectors, 558 dev->dev_attrib.hw_block_size, 559 dev->dev_attrib.block_size); 560 put_unaligned_be32(min_not_zero(mtl, io_max_blocks), &buf[8]); 561 562 /* 563 * Set OPTIMAL TRANSFER LENGTH 564 */ 565 if (dev->transport->get_io_opt && (opt = dev->transport->get_io_opt(dev))) 566 put_unaligned_be32(opt / dev->dev_attrib.block_size, &buf[12]); 567 else 568 put_unaligned_be32(dev->dev_attrib.optimal_sectors, &buf[12]); 569 570 /* 571 * Exit now if we don't support TP. 572 */ 573 if (!have_tp) 574 goto max_write_same; 575 576 /* 577 * Set MAXIMUM UNMAP LBA COUNT 578 */ 579 put_unaligned_be32(dev->dev_attrib.max_unmap_lba_count, &buf[20]); 580 581 /* 582 * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT 583 */ 584 put_unaligned_be32(dev->dev_attrib.max_unmap_block_desc_count, 585 &buf[24]); 586 587 /* 588 * Set OPTIMAL UNMAP GRANULARITY 589 */ 590 put_unaligned_be32(dev->dev_attrib.unmap_granularity, &buf[28]); 591 592 /* 593 * UNMAP GRANULARITY ALIGNMENT 594 */ 595 put_unaligned_be32(dev->dev_attrib.unmap_granularity_alignment, 596 &buf[32]); 597 if (dev->dev_attrib.unmap_granularity_alignment != 0) 598 buf[32] |= 0x80; /* Set the UGAVALID bit */ 599 600 /* 601 * MAXIMUM WRITE SAME LENGTH 602 */ 603 max_write_same: 604 put_unaligned_be64(dev->dev_attrib.max_write_same_len, &buf[36]); 605 606 return 0; 607 } 608 609 /* Block Device Characteristics VPD page */ 610 static sense_reason_t 611 spc_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) 612 { 613 struct se_device *dev = cmd->se_dev; 614 615 buf[0] = dev->transport->get_device_type(dev); 616 buf[3] = 0x3c; 617 buf[5] = dev->dev_attrib.is_nonrot ? 1 : 0; 618 619 return 0; 620 } 621 622 /* Thin Provisioning VPD */ 623 static sense_reason_t 624 spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) 625 { 626 struct se_device *dev = cmd->se_dev; 627 628 /* 629 * From spc3r22 section 6.5.4 Thin Provisioning VPD page: 630 * 631 * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to 632 * zero, then the page length shall be set to 0004h. If the DP bit 633 * is set to one, then the page length shall be set to the value 634 * defined in table 162. 635 */ 636 buf[0] = dev->transport->get_device_type(dev); 637 638 /* 639 * Set Hardcoded length mentioned above for DP=0 640 */ 641 put_unaligned_be16(0x0004, &buf[2]); 642 643 /* 644 * The THRESHOLD EXPONENT field indicates the threshold set size in 645 * LBAs as a power of 2 (i.e., the threshold set size is equal to 646 * 2(threshold exponent)). 647 * 648 * Note that this is currently set to 0x00 as mkp says it will be 649 * changing again. We can enable this once it has settled in T10 650 * and is actually used by Linux/SCSI ML code. 651 */ 652 buf[4] = 0x00; 653 654 /* 655 * A TPU bit set to one indicates that the device server supports 656 * the UNMAP command (see 5.25). A TPU bit set to zero indicates 657 * that the device server does not support the UNMAP command. 658 */ 659 if (dev->dev_attrib.emulate_tpu != 0) 660 buf[5] = 0x80; 661 662 /* 663 * A TPWS bit set to one indicates that the device server supports 664 * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. 665 * A TPWS bit set to zero indicates that the device server does not 666 * support the use of the WRITE SAME (16) command to unmap LBAs. 667 */ 668 if (dev->dev_attrib.emulate_tpws != 0) 669 buf[5] |= 0x40 | 0x20; 670 671 /* 672 * The unmap_zeroes_data set means that the underlying device supports 673 * REQ_OP_DISCARD and has the discard_zeroes_data bit set. This 674 * satisfies the SBC requirements for LBPRZ, meaning that a subsequent 675 * read will return zeroes after an UNMAP or WRITE SAME (16) to an LBA 676 * See sbc4r36 6.6.4. 677 */ 678 if (((dev->dev_attrib.emulate_tpu != 0) || 679 (dev->dev_attrib.emulate_tpws != 0)) && 680 (dev->dev_attrib.unmap_zeroes_data != 0)) 681 buf[5] |= 0x04; 682 683 return 0; 684 } 685 686 /* Referrals VPD page */ 687 static sense_reason_t 688 spc_emulate_evpd_b3(struct se_cmd *cmd, unsigned char *buf) 689 { 690 struct se_device *dev = cmd->se_dev; 691 692 buf[0] = dev->transport->get_device_type(dev); 693 buf[3] = 0x0c; 694 put_unaligned_be32(dev->t10_alua.lba_map_segment_size, &buf[8]); 695 put_unaligned_be32(dev->t10_alua.lba_map_segment_multiplier, &buf[12]); 696 697 return 0; 698 } 699 700 static sense_reason_t 701 spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); 702 703 static struct { 704 uint8_t page; 705 sense_reason_t (*emulate)(struct se_cmd *, unsigned char *); 706 } evpd_handlers[] = { 707 { .page = 0x00, .emulate = spc_emulate_evpd_00 }, 708 { .page = 0x80, .emulate = spc_emulate_evpd_80 }, 709 { .page = 0x83, .emulate = spc_emulate_evpd_83 }, 710 { .page = 0x86, .emulate = spc_emulate_evpd_86 }, 711 { .page = 0xb0, .emulate = spc_emulate_evpd_b0 }, 712 { .page = 0xb1, .emulate = spc_emulate_evpd_b1 }, 713 { .page = 0xb2, .emulate = spc_emulate_evpd_b2 }, 714 { .page = 0xb3, .emulate = spc_emulate_evpd_b3 }, 715 }; 716 717 /* supported vital product data pages */ 718 static sense_reason_t 719 spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) 720 { 721 int p; 722 723 /* 724 * Only report the INQUIRY EVPD=1 pages after a valid NAA 725 * Registered Extended LUN WWN has been set via ConfigFS 726 * during device creation/restart. 727 */ 728 if (cmd->se_dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { 729 buf[3] = ARRAY_SIZE(evpd_handlers); 730 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) 731 buf[p + 4] = evpd_handlers[p].page; 732 } 733 734 return 0; 735 } 736 737 static sense_reason_t 738 spc_emulate_inquiry(struct se_cmd *cmd) 739 { 740 struct se_device *dev = cmd->se_dev; 741 unsigned char *rbuf; 742 unsigned char *cdb = cmd->t_task_cdb; 743 unsigned char *buf; 744 sense_reason_t ret; 745 int p; 746 int len = 0; 747 748 buf = kzalloc(SE_INQUIRY_BUF, GFP_KERNEL); 749 if (!buf) { 750 pr_err("Unable to allocate response buffer for INQUIRY\n"); 751 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 752 } 753 754 buf[0] = dev->transport->get_device_type(dev); 755 756 if (!(cdb[1] & 0x1)) { 757 if (cdb[2]) { 758 pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n", 759 cdb[2]); 760 ret = TCM_INVALID_CDB_FIELD; 761 goto out; 762 } 763 764 ret = spc_emulate_inquiry_std(cmd, buf); 765 len = buf[4] + 5; 766 goto out; 767 } 768 769 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) { 770 if (cdb[2] == evpd_handlers[p].page) { 771 buf[1] = cdb[2]; 772 ret = evpd_handlers[p].emulate(cmd, buf); 773 len = get_unaligned_be16(&buf[2]) + 4; 774 goto out; 775 } 776 } 777 778 pr_debug("Unknown VPD Code: 0x%02x\n", cdb[2]); 779 ret = TCM_INVALID_CDB_FIELD; 780 781 out: 782 rbuf = transport_kmap_data_sg(cmd); 783 if (rbuf) { 784 memcpy(rbuf, buf, min_t(u32, SE_INQUIRY_BUF, cmd->data_length)); 785 transport_kunmap_data_sg(cmd); 786 } 787 kfree(buf); 788 789 if (!ret) 790 target_complete_cmd_with_length(cmd, SAM_STAT_GOOD, len); 791 return ret; 792 } 793 794 static int spc_modesense_rwrecovery(struct se_cmd *cmd, u8 pc, u8 *p) 795 { 796 p[0] = 0x01; 797 p[1] = 0x0a; 798 799 /* No changeable values for now */ 800 if (pc == 1) 801 goto out; 802 803 out: 804 return 12; 805 } 806 807 static int spc_modesense_control(struct se_cmd *cmd, u8 pc, u8 *p) 808 { 809 struct se_device *dev = cmd->se_dev; 810 struct se_session *sess = cmd->se_sess; 811 812 p[0] = 0x0a; 813 p[1] = 0x0a; 814 815 /* No changeable values for now */ 816 if (pc == 1) 817 goto out; 818 819 /* GLTSD: No implicit save of log parameters */ 820 p[2] = (1 << 1); 821 if (target_sense_desc_format(dev)) 822 /* D_SENSE: Descriptor format sense data for 64bit sectors */ 823 p[2] |= (1 << 2); 824 825 /* 826 * From spc4r23, 7.4.7 Control mode page 827 * 828 * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies 829 * restrictions on the algorithm used for reordering commands 830 * having the SIMPLE task attribute (see SAM-4). 831 * 832 * Table 368 -- QUEUE ALGORITHM MODIFIER field 833 * Code Description 834 * 0h Restricted reordering 835 * 1h Unrestricted reordering allowed 836 * 2h to 7h Reserved 837 * 8h to Fh Vendor specific 838 * 839 * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that 840 * the device server shall order the processing sequence of commands 841 * having the SIMPLE task attribute such that data integrity is maintained 842 * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol 843 * requests is halted at any time, the final value of all data observable 844 * on the medium shall be the same as if all the commands had been processed 845 * with the ORDERED task attribute). 846 * 847 * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the 848 * device server may reorder the processing sequence of commands having the 849 * SIMPLE task attribute in any manner. Any data integrity exposures related to 850 * command sequence order shall be explicitly handled by the application client 851 * through the selection of appropriate ommands and task attributes. 852 */ 853 p[3] = (dev->dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; 854 /* 855 * From spc4r17, section 7.4.6 Control mode Page 856 * 857 * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b 858 * 859 * 00b: The logical unit shall clear any unit attention condition 860 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION 861 * status and shall not establish a unit attention condition when a com- 862 * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT 863 * status. 864 * 865 * 10b: The logical unit shall not clear any unit attention condition 866 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION 867 * status and shall not establish a unit attention condition when 868 * a command is completed with BUSY, TASK SET FULL, or RESERVATION 869 * CONFLICT status. 870 * 871 * 11b a The logical unit shall not clear any unit attention condition 872 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION 873 * status and shall establish a unit attention condition for the 874 * initiator port associated with the I_T nexus on which the BUSY, 875 * TASK SET FULL, or RESERVATION CONFLICT status is being returned. 876 * Depending on the status, the additional sense code shall be set to 877 * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS 878 * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE 879 * command, a unit attention condition shall be established only once 880 * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless 881 * to the number of commands completed with one of those status codes. 882 */ 883 switch (dev->dev_attrib.emulate_ua_intlck_ctrl) { 884 case TARGET_UA_INTLCK_CTRL_ESTABLISH_UA: 885 p[4] = 0x30; 886 break; 887 case TARGET_UA_INTLCK_CTRL_NO_CLEAR: 888 p[4] = 0x20; 889 break; 890 default: /* TARGET_UA_INTLCK_CTRL_CLEAR */ 891 p[4] = 0x00; 892 break; 893 } 894 /* 895 * From spc4r17, section 7.4.6 Control mode Page 896 * 897 * Task Aborted Status (TAS) bit set to zero. 898 * 899 * A task aborted status (TAS) bit set to zero specifies that aborted 900 * tasks shall be terminated by the device server without any response 901 * to the application client. A TAS bit set to one specifies that tasks 902 * aborted by the actions of an I_T nexus other than the I_T nexus on 903 * which the command was received shall be completed with TASK ABORTED 904 * status (see SAM-4). 905 */ 906 p[5] = (dev->dev_attrib.emulate_tas) ? 0x40 : 0x00; 907 /* 908 * From spc4r30, section 7.5.7 Control mode page 909 * 910 * Application Tag Owner (ATO) bit set to one. 911 * 912 * If the ATO bit is set to one the device server shall not modify the 913 * LOGICAL BLOCK APPLICATION TAG field and, depending on the protection 914 * type, shall not modify the contents of the LOGICAL BLOCK REFERENCE 915 * TAG field. 916 */ 917 if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) { 918 if (dev->dev_attrib.pi_prot_type || sess->sess_prot_type) 919 p[5] |= 0x80; 920 } 921 922 p[8] = 0xff; 923 p[9] = 0xff; 924 p[11] = 30; 925 926 out: 927 return 12; 928 } 929 930 static int spc_modesense_caching(struct se_cmd *cmd, u8 pc, u8 *p) 931 { 932 struct se_device *dev = cmd->se_dev; 933 934 p[0] = 0x08; 935 p[1] = 0x12; 936 937 /* No changeable values for now */ 938 if (pc == 1) 939 goto out; 940 941 if (target_check_wce(dev)) 942 p[2] = 0x04; /* Write Cache Enable */ 943 p[12] = 0x20; /* Disabled Read Ahead */ 944 945 out: 946 return 20; 947 } 948 949 static int spc_modesense_informational_exceptions(struct se_cmd *cmd, u8 pc, unsigned char *p) 950 { 951 p[0] = 0x1c; 952 p[1] = 0x0a; 953 954 /* No changeable values for now */ 955 if (pc == 1) 956 goto out; 957 958 out: 959 return 12; 960 } 961 962 static struct { 963 uint8_t page; 964 uint8_t subpage; 965 int (*emulate)(struct se_cmd *, u8, unsigned char *); 966 } modesense_handlers[] = { 967 { .page = 0x01, .subpage = 0x00, .emulate = spc_modesense_rwrecovery }, 968 { .page = 0x08, .subpage = 0x00, .emulate = spc_modesense_caching }, 969 { .page = 0x0a, .subpage = 0x00, .emulate = spc_modesense_control }, 970 { .page = 0x1c, .subpage = 0x00, .emulate = spc_modesense_informational_exceptions }, 971 }; 972 973 static void spc_modesense_write_protect(unsigned char *buf, int type) 974 { 975 /* 976 * I believe that the WP bit (bit 7) in the mode header is the same for 977 * all device types.. 978 */ 979 switch (type) { 980 case TYPE_DISK: 981 case TYPE_TAPE: 982 default: 983 buf[0] |= 0x80; /* WP bit */ 984 break; 985 } 986 } 987 988 static void spc_modesense_dpofua(unsigned char *buf, int type) 989 { 990 switch (type) { 991 case TYPE_DISK: 992 buf[0] |= 0x10; /* DPOFUA bit */ 993 break; 994 default: 995 break; 996 } 997 } 998 999 static int spc_modesense_blockdesc(unsigned char *buf, u64 blocks, u32 block_size) 1000 { 1001 *buf++ = 8; 1002 put_unaligned_be32(min(blocks, 0xffffffffull), buf); 1003 buf += 4; 1004 put_unaligned_be32(block_size, buf); 1005 return 9; 1006 } 1007 1008 static int spc_modesense_long_blockdesc(unsigned char *buf, u64 blocks, u32 block_size) 1009 { 1010 if (blocks <= 0xffffffff) 1011 return spc_modesense_blockdesc(buf + 3, blocks, block_size) + 3; 1012 1013 *buf++ = 1; /* LONGLBA */ 1014 buf += 2; 1015 *buf++ = 16; 1016 put_unaligned_be64(blocks, buf); 1017 buf += 12; 1018 put_unaligned_be32(block_size, buf); 1019 1020 return 17; 1021 } 1022 1023 static sense_reason_t spc_emulate_modesense(struct se_cmd *cmd) 1024 { 1025 struct se_device *dev = cmd->se_dev; 1026 char *cdb = cmd->t_task_cdb; 1027 unsigned char buf[SE_MODE_PAGE_BUF], *rbuf; 1028 int type = dev->transport->get_device_type(dev); 1029 int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10); 1030 bool dbd = !!(cdb[1] & 0x08); 1031 bool llba = ten ? !!(cdb[1] & 0x10) : false; 1032 u8 pc = cdb[2] >> 6; 1033 u8 page = cdb[2] & 0x3f; 1034 u8 subpage = cdb[3]; 1035 int length = 0; 1036 int ret; 1037 int i; 1038 1039 memset(buf, 0, SE_MODE_PAGE_BUF); 1040 1041 /* 1042 * Skip over MODE DATA LENGTH + MEDIUM TYPE fields to byte 3 for 1043 * MODE_SENSE_10 and byte 2 for MODE_SENSE (6). 1044 */ 1045 length = ten ? 3 : 2; 1046 1047 /* DEVICE-SPECIFIC PARAMETER */ 1048 if (cmd->se_lun->lun_access_ro || target_lun_is_rdonly(cmd)) 1049 spc_modesense_write_protect(&buf[length], type); 1050 1051 /* 1052 * SBC only allows us to enable FUA and DPO together. Fortunately 1053 * DPO is explicitly specified as a hint, so a noop is a perfectly 1054 * valid implementation. 1055 */ 1056 if (target_check_fua(dev)) 1057 spc_modesense_dpofua(&buf[length], type); 1058 1059 ++length; 1060 1061 /* BLOCK DESCRIPTOR */ 1062 1063 /* 1064 * For now we only include a block descriptor for disk (SBC) 1065 * devices; other command sets use a slightly different format. 1066 */ 1067 if (!dbd && type == TYPE_DISK) { 1068 u64 blocks = dev->transport->get_blocks(dev); 1069 u32 block_size = dev->dev_attrib.block_size; 1070 1071 if (ten) { 1072 if (llba) { 1073 length += spc_modesense_long_blockdesc(&buf[length], 1074 blocks, block_size); 1075 } else { 1076 length += 3; 1077 length += spc_modesense_blockdesc(&buf[length], 1078 blocks, block_size); 1079 } 1080 } else { 1081 length += spc_modesense_blockdesc(&buf[length], blocks, 1082 block_size); 1083 } 1084 } else { 1085 if (ten) 1086 length += 4; 1087 else 1088 length += 1; 1089 } 1090 1091 if (page == 0x3f) { 1092 if (subpage != 0x00 && subpage != 0xff) { 1093 pr_warn("MODE_SENSE: Invalid subpage code: 0x%02x\n", subpage); 1094 return TCM_INVALID_CDB_FIELD; 1095 } 1096 1097 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) { 1098 /* 1099 * Tricky way to say all subpage 00h for 1100 * subpage==0, all subpages for subpage==0xff 1101 * (and we just checked above that those are 1102 * the only two possibilities). 1103 */ 1104 if ((modesense_handlers[i].subpage & ~subpage) == 0) { 1105 ret = modesense_handlers[i].emulate(cmd, pc, &buf[length]); 1106 if (!ten && length + ret >= 255) 1107 break; 1108 length += ret; 1109 } 1110 } 1111 1112 goto set_length; 1113 } 1114 1115 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) 1116 if (modesense_handlers[i].page == page && 1117 modesense_handlers[i].subpage == subpage) { 1118 length += modesense_handlers[i].emulate(cmd, pc, &buf[length]); 1119 goto set_length; 1120 } 1121 1122 /* 1123 * We don't intend to implement: 1124 * - obsolete page 03h "format parameters" (checked by Solaris) 1125 */ 1126 if (page != 0x03) 1127 pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", 1128 page, subpage); 1129 1130 return TCM_UNKNOWN_MODE_PAGE; 1131 1132 set_length: 1133 if (ten) 1134 put_unaligned_be16(length - 2, buf); 1135 else 1136 buf[0] = length - 1; 1137 1138 rbuf = transport_kmap_data_sg(cmd); 1139 if (rbuf) { 1140 memcpy(rbuf, buf, min_t(u32, SE_MODE_PAGE_BUF, cmd->data_length)); 1141 transport_kunmap_data_sg(cmd); 1142 } 1143 1144 target_complete_cmd_with_length(cmd, SAM_STAT_GOOD, length); 1145 return 0; 1146 } 1147 1148 static sense_reason_t spc_emulate_modeselect(struct se_cmd *cmd) 1149 { 1150 char *cdb = cmd->t_task_cdb; 1151 bool ten = cdb[0] == MODE_SELECT_10; 1152 int off = ten ? 8 : 4; 1153 bool pf = !!(cdb[1] & 0x10); 1154 u8 page, subpage; 1155 unsigned char *buf; 1156 unsigned char tbuf[SE_MODE_PAGE_BUF]; 1157 int length; 1158 sense_reason_t ret = 0; 1159 int i; 1160 1161 if (!cmd->data_length) { 1162 target_complete_cmd(cmd, SAM_STAT_GOOD); 1163 return 0; 1164 } 1165 1166 if (cmd->data_length < off + 2) 1167 return TCM_PARAMETER_LIST_LENGTH_ERROR; 1168 1169 buf = transport_kmap_data_sg(cmd); 1170 if (!buf) 1171 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1172 1173 if (!pf) { 1174 ret = TCM_INVALID_CDB_FIELD; 1175 goto out; 1176 } 1177 1178 page = buf[off] & 0x3f; 1179 subpage = buf[off] & 0x40 ? buf[off + 1] : 0; 1180 1181 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) 1182 if (modesense_handlers[i].page == page && 1183 modesense_handlers[i].subpage == subpage) { 1184 memset(tbuf, 0, SE_MODE_PAGE_BUF); 1185 length = modesense_handlers[i].emulate(cmd, 0, tbuf); 1186 goto check_contents; 1187 } 1188 1189 ret = TCM_UNKNOWN_MODE_PAGE; 1190 goto out; 1191 1192 check_contents: 1193 if (cmd->data_length < off + length) { 1194 ret = TCM_PARAMETER_LIST_LENGTH_ERROR; 1195 goto out; 1196 } 1197 1198 if (memcmp(buf + off, tbuf, length)) 1199 ret = TCM_INVALID_PARAMETER_LIST; 1200 1201 out: 1202 transport_kunmap_data_sg(cmd); 1203 1204 if (!ret) 1205 target_complete_cmd(cmd, SAM_STAT_GOOD); 1206 return ret; 1207 } 1208 1209 static sense_reason_t spc_emulate_request_sense(struct se_cmd *cmd) 1210 { 1211 unsigned char *cdb = cmd->t_task_cdb; 1212 unsigned char *rbuf; 1213 u8 ua_asc = 0, ua_ascq = 0; 1214 unsigned char buf[SE_SENSE_BUF]; 1215 bool desc_format = target_sense_desc_format(cmd->se_dev); 1216 1217 memset(buf, 0, SE_SENSE_BUF); 1218 1219 if (cdb[1] & 0x01) { 1220 pr_err("REQUEST_SENSE description emulation not" 1221 " supported\n"); 1222 return TCM_INVALID_CDB_FIELD; 1223 } 1224 1225 rbuf = transport_kmap_data_sg(cmd); 1226 if (!rbuf) 1227 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1228 1229 if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) 1230 scsi_build_sense_buffer(desc_format, buf, UNIT_ATTENTION, 1231 ua_asc, ua_ascq); 1232 else 1233 scsi_build_sense_buffer(desc_format, buf, NO_SENSE, 0x0, 0x0); 1234 1235 memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length)); 1236 transport_kunmap_data_sg(cmd); 1237 1238 target_complete_cmd(cmd, SAM_STAT_GOOD); 1239 return 0; 1240 } 1241 1242 sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd) 1243 { 1244 struct se_dev_entry *deve; 1245 struct se_session *sess = cmd->se_sess; 1246 struct se_node_acl *nacl; 1247 struct scsi_lun slun; 1248 unsigned char *buf; 1249 u32 lun_count = 0, offset = 8; 1250 __be32 len; 1251 1252 buf = transport_kmap_data_sg(cmd); 1253 if (cmd->data_length && !buf) 1254 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1255 1256 /* 1257 * If no struct se_session pointer is present, this struct se_cmd is 1258 * coming via a target_core_mod PASSTHROUGH op, and not through 1259 * a $FABRIC_MOD. In that case, report LUN=0 only. 1260 */ 1261 if (!sess) 1262 goto done; 1263 1264 nacl = sess->se_node_acl; 1265 1266 rcu_read_lock(); 1267 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) { 1268 /* 1269 * We determine the correct LUN LIST LENGTH even once we 1270 * have reached the initial allocation length. 1271 * See SPC2-R20 7.19. 1272 */ 1273 lun_count++; 1274 if (offset >= cmd->data_length) 1275 continue; 1276 1277 int_to_scsilun(deve->mapped_lun, &slun); 1278 memcpy(buf + offset, &slun, 1279 min(8u, cmd->data_length - offset)); 1280 offset += 8; 1281 } 1282 rcu_read_unlock(); 1283 1284 /* 1285 * See SPC3 r07, page 159. 1286 */ 1287 done: 1288 /* 1289 * If no LUNs are accessible, report virtual LUN 0. 1290 */ 1291 if (lun_count == 0) { 1292 int_to_scsilun(0, &slun); 1293 if (cmd->data_length > 8) 1294 memcpy(buf + offset, &slun, 1295 min(8u, cmd->data_length - offset)); 1296 lun_count = 1; 1297 } 1298 1299 if (buf) { 1300 len = cpu_to_be32(lun_count * 8); 1301 memcpy(buf, &len, min_t(int, sizeof len, cmd->data_length)); 1302 transport_kunmap_data_sg(cmd); 1303 } 1304 1305 target_complete_cmd_with_length(cmd, SAM_STAT_GOOD, 8 + lun_count * 8); 1306 return 0; 1307 } 1308 EXPORT_SYMBOL(spc_emulate_report_luns); 1309 1310 static sense_reason_t 1311 spc_emulate_testunitready(struct se_cmd *cmd) 1312 { 1313 target_complete_cmd(cmd, SAM_STAT_GOOD); 1314 return 0; 1315 } 1316 1317 static void set_dpofua_usage_bits(u8 *usage_bits, struct se_device *dev) 1318 { 1319 if (!target_check_fua(dev)) 1320 usage_bits[1] &= ~0x18; 1321 else 1322 usage_bits[1] |= 0x18; 1323 } 1324 1325 static void set_dpofua_usage_bits32(u8 *usage_bits, struct se_device *dev) 1326 { 1327 if (!target_check_fua(dev)) 1328 usage_bits[10] &= ~0x18; 1329 else 1330 usage_bits[10] |= 0x18; 1331 } 1332 1333 static struct target_opcode_descriptor tcm_opcode_read6 = { 1334 .support = SCSI_SUPPORT_FULL, 1335 .opcode = READ_6, 1336 .cdb_size = 6, 1337 .usage_bits = {READ_6, 0x1f, 0xff, 0xff, 1338 0xff, SCSI_CONTROL_MASK}, 1339 }; 1340 1341 static struct target_opcode_descriptor tcm_opcode_read10 = { 1342 .support = SCSI_SUPPORT_FULL, 1343 .opcode = READ_10, 1344 .cdb_size = 10, 1345 .usage_bits = {READ_10, 0xf8, 0xff, 0xff, 1346 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff, 1347 0xff, SCSI_CONTROL_MASK}, 1348 .update_usage_bits = set_dpofua_usage_bits, 1349 }; 1350 1351 static struct target_opcode_descriptor tcm_opcode_read12 = { 1352 .support = SCSI_SUPPORT_FULL, 1353 .opcode = READ_12, 1354 .cdb_size = 12, 1355 .usage_bits = {READ_12, 0xf8, 0xff, 0xff, 1356 0xff, 0xff, 0xff, 0xff, 1357 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK}, 1358 .update_usage_bits = set_dpofua_usage_bits, 1359 }; 1360 1361 static struct target_opcode_descriptor tcm_opcode_read16 = { 1362 .support = SCSI_SUPPORT_FULL, 1363 .opcode = READ_16, 1364 .cdb_size = 16, 1365 .usage_bits = {READ_16, 0xf8, 0xff, 0xff, 1366 0xff, 0xff, 0xff, 0xff, 1367 0xff, 0xff, 0xff, 0xff, 1368 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK}, 1369 .update_usage_bits = set_dpofua_usage_bits, 1370 }; 1371 1372 static struct target_opcode_descriptor tcm_opcode_write6 = { 1373 .support = SCSI_SUPPORT_FULL, 1374 .opcode = WRITE_6, 1375 .cdb_size = 6, 1376 .usage_bits = {WRITE_6, 0x1f, 0xff, 0xff, 1377 0xff, SCSI_CONTROL_MASK}, 1378 }; 1379 1380 static struct target_opcode_descriptor tcm_opcode_write10 = { 1381 .support = SCSI_SUPPORT_FULL, 1382 .opcode = WRITE_10, 1383 .cdb_size = 10, 1384 .usage_bits = {WRITE_10, 0xf8, 0xff, 0xff, 1385 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff, 1386 0xff, SCSI_CONTROL_MASK}, 1387 .update_usage_bits = set_dpofua_usage_bits, 1388 }; 1389 1390 static struct target_opcode_descriptor tcm_opcode_write_verify10 = { 1391 .support = SCSI_SUPPORT_FULL, 1392 .opcode = WRITE_VERIFY, 1393 .cdb_size = 10, 1394 .usage_bits = {WRITE_VERIFY, 0xf0, 0xff, 0xff, 1395 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff, 1396 0xff, SCSI_CONTROL_MASK}, 1397 .update_usage_bits = set_dpofua_usage_bits, 1398 }; 1399 1400 static struct target_opcode_descriptor tcm_opcode_write12 = { 1401 .support = SCSI_SUPPORT_FULL, 1402 .opcode = WRITE_12, 1403 .cdb_size = 12, 1404 .usage_bits = {WRITE_12, 0xf8, 0xff, 0xff, 1405 0xff, 0xff, 0xff, 0xff, 1406 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK}, 1407 .update_usage_bits = set_dpofua_usage_bits, 1408 }; 1409 1410 static struct target_opcode_descriptor tcm_opcode_write16 = { 1411 .support = SCSI_SUPPORT_FULL, 1412 .opcode = WRITE_16, 1413 .cdb_size = 16, 1414 .usage_bits = {WRITE_16, 0xf8, 0xff, 0xff, 1415 0xff, 0xff, 0xff, 0xff, 1416 0xff, 0xff, 0xff, 0xff, 1417 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK}, 1418 .update_usage_bits = set_dpofua_usage_bits, 1419 }; 1420 1421 static struct target_opcode_descriptor tcm_opcode_write_verify16 = { 1422 .support = SCSI_SUPPORT_FULL, 1423 .opcode = WRITE_VERIFY_16, 1424 .cdb_size = 16, 1425 .usage_bits = {WRITE_VERIFY_16, 0xf0, 0xff, 0xff, 1426 0xff, 0xff, 0xff, 0xff, 1427 0xff, 0xff, 0xff, 0xff, 1428 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK}, 1429 .update_usage_bits = set_dpofua_usage_bits, 1430 }; 1431 1432 static bool tcm_is_ws_enabled(struct se_cmd *cmd) 1433 { 1434 struct sbc_ops *ops = cmd->protocol_data; 1435 struct se_device *dev = cmd->se_dev; 1436 1437 return (dev->dev_attrib.emulate_tpws && !!ops->execute_unmap) || 1438 !!ops->execute_write_same; 1439 } 1440 1441 static struct target_opcode_descriptor tcm_opcode_write_same32 = { 1442 .support = SCSI_SUPPORT_FULL, 1443 .serv_action_valid = 1, 1444 .opcode = VARIABLE_LENGTH_CMD, 1445 .service_action = WRITE_SAME_32, 1446 .cdb_size = 32, 1447 .usage_bits = {VARIABLE_LENGTH_CMD, SCSI_CONTROL_MASK, 0x00, 0x00, 1448 0x00, 0x00, SCSI_GROUP_NUMBER_MASK, 0x18, 1449 0x00, WRITE_SAME_32, 0xe8, 0x00, 1450 0xff, 0xff, 0xff, 0xff, 1451 0xff, 0xff, 0xff, 0xff, 1452 0x00, 0x00, 0x00, 0x00, 1453 0x00, 0x00, 0x00, 0x00, 1454 0xff, 0xff, 0xff, 0xff}, 1455 .enabled = tcm_is_ws_enabled, 1456 .update_usage_bits = set_dpofua_usage_bits32, 1457 }; 1458 1459 static bool tcm_is_caw_enabled(struct se_cmd *cmd) 1460 { 1461 struct se_device *dev = cmd->se_dev; 1462 1463 return dev->dev_attrib.emulate_caw; 1464 } 1465 1466 static struct target_opcode_descriptor tcm_opcode_compare_write = { 1467 .support = SCSI_SUPPORT_FULL, 1468 .opcode = COMPARE_AND_WRITE, 1469 .cdb_size = 16, 1470 .usage_bits = {COMPARE_AND_WRITE, 0x18, 0xff, 0xff, 1471 0xff, 0xff, 0xff, 0xff, 1472 0xff, 0xff, 0x00, 0x00, 1473 0x00, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK}, 1474 .enabled = tcm_is_caw_enabled, 1475 .update_usage_bits = set_dpofua_usage_bits, 1476 }; 1477 1478 static struct target_opcode_descriptor tcm_opcode_read_capacity = { 1479 .support = SCSI_SUPPORT_FULL, 1480 .opcode = READ_CAPACITY, 1481 .cdb_size = 10, 1482 .usage_bits = {READ_CAPACITY, 0x00, 0xff, 0xff, 1483 0xff, 0xff, 0x00, 0x00, 1484 0x01, SCSI_CONTROL_MASK}, 1485 }; 1486 1487 static struct target_opcode_descriptor tcm_opcode_read_capacity16 = { 1488 .support = SCSI_SUPPORT_FULL, 1489 .serv_action_valid = 1, 1490 .opcode = SERVICE_ACTION_IN_16, 1491 .service_action = SAI_READ_CAPACITY_16, 1492 .cdb_size = 16, 1493 .usage_bits = {SERVICE_ACTION_IN_16, SAI_READ_CAPACITY_16, 0x00, 0x00, 1494 0x00, 0x00, 0x00, 0x00, 1495 0x00, 0x00, 0xff, 0xff, 1496 0xff, 0xff, 0x00, SCSI_CONTROL_MASK}, 1497 }; 1498 1499 static bool tcm_is_rep_ref_enabled(struct se_cmd *cmd) 1500 { 1501 struct se_device *dev = cmd->se_dev; 1502 1503 spin_lock(&dev->t10_alua.lba_map_lock); 1504 if (list_empty(&dev->t10_alua.lba_map_list)) { 1505 spin_unlock(&dev->t10_alua.lba_map_lock); 1506 return false; 1507 } 1508 spin_unlock(&dev->t10_alua.lba_map_lock); 1509 return true; 1510 1511 } 1512 1513 static struct target_opcode_descriptor tcm_opcode_read_report_refferals = { 1514 .support = SCSI_SUPPORT_FULL, 1515 .serv_action_valid = 1, 1516 .opcode = SERVICE_ACTION_IN_16, 1517 .service_action = SAI_REPORT_REFERRALS, 1518 .cdb_size = 16, 1519 .usage_bits = {SERVICE_ACTION_IN_16, SAI_REPORT_REFERRALS, 0x00, 0x00, 1520 0x00, 0x00, 0x00, 0x00, 1521 0x00, 0x00, 0xff, 0xff, 1522 0xff, 0xff, 0x00, SCSI_CONTROL_MASK}, 1523 .enabled = tcm_is_rep_ref_enabled, 1524 }; 1525 1526 static struct target_opcode_descriptor tcm_opcode_sync_cache = { 1527 .support = SCSI_SUPPORT_FULL, 1528 .opcode = SYNCHRONIZE_CACHE, 1529 .cdb_size = 10, 1530 .usage_bits = {SYNCHRONIZE_CACHE, 0x02, 0xff, 0xff, 1531 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff, 1532 0xff, SCSI_CONTROL_MASK}, 1533 }; 1534 1535 static struct target_opcode_descriptor tcm_opcode_sync_cache16 = { 1536 .support = SCSI_SUPPORT_FULL, 1537 .opcode = SYNCHRONIZE_CACHE_16, 1538 .cdb_size = 16, 1539 .usage_bits = {SYNCHRONIZE_CACHE_16, 0x02, 0xff, 0xff, 1540 0xff, 0xff, 0xff, 0xff, 1541 0xff, 0xff, 0xff, 0xff, 1542 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK}, 1543 }; 1544 1545 static bool tcm_is_unmap_enabled(struct se_cmd *cmd) 1546 { 1547 struct sbc_ops *ops = cmd->protocol_data; 1548 struct se_device *dev = cmd->se_dev; 1549 1550 return ops->execute_unmap && dev->dev_attrib.emulate_tpu; 1551 } 1552 1553 static struct target_opcode_descriptor tcm_opcode_unmap = { 1554 .support = SCSI_SUPPORT_FULL, 1555 .opcode = UNMAP, 1556 .cdb_size = 10, 1557 .usage_bits = {UNMAP, 0x00, 0x00, 0x00, 1558 0x00, 0x00, SCSI_GROUP_NUMBER_MASK, 0xff, 1559 0xff, SCSI_CONTROL_MASK}, 1560 .enabled = tcm_is_unmap_enabled, 1561 }; 1562 1563 static struct target_opcode_descriptor tcm_opcode_write_same = { 1564 .support = SCSI_SUPPORT_FULL, 1565 .opcode = WRITE_SAME, 1566 .cdb_size = 10, 1567 .usage_bits = {WRITE_SAME, 0xe8, 0xff, 0xff, 1568 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff, 1569 0xff, SCSI_CONTROL_MASK}, 1570 .enabled = tcm_is_ws_enabled, 1571 }; 1572 1573 static struct target_opcode_descriptor tcm_opcode_write_same16 = { 1574 .support = SCSI_SUPPORT_FULL, 1575 .opcode = WRITE_SAME_16, 1576 .cdb_size = 16, 1577 .usage_bits = {WRITE_SAME_16, 0xe8, 0xff, 0xff, 1578 0xff, 0xff, 0xff, 0xff, 1579 0xff, 0xff, 0xff, 0xff, 1580 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK}, 1581 .enabled = tcm_is_ws_enabled, 1582 }; 1583 1584 static struct target_opcode_descriptor tcm_opcode_verify = { 1585 .support = SCSI_SUPPORT_FULL, 1586 .opcode = VERIFY, 1587 .cdb_size = 10, 1588 .usage_bits = {VERIFY, 0x00, 0xff, 0xff, 1589 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff, 1590 0xff, SCSI_CONTROL_MASK}, 1591 }; 1592 1593 static struct target_opcode_descriptor tcm_opcode_verify16 = { 1594 .support = SCSI_SUPPORT_FULL, 1595 .opcode = VERIFY_16, 1596 .cdb_size = 16, 1597 .usage_bits = {VERIFY_16, 0x00, 0xff, 0xff, 1598 0xff, 0xff, 0xff, 0xff, 1599 0xff, 0xff, 0xff, 0xff, 1600 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK}, 1601 }; 1602 1603 static struct target_opcode_descriptor tcm_opcode_start_stop = { 1604 .support = SCSI_SUPPORT_FULL, 1605 .opcode = START_STOP, 1606 .cdb_size = 6, 1607 .usage_bits = {START_STOP, 0x01, 0x00, 0x00, 1608 0x01, SCSI_CONTROL_MASK}, 1609 }; 1610 1611 static struct target_opcode_descriptor tcm_opcode_mode_select = { 1612 .support = SCSI_SUPPORT_FULL, 1613 .opcode = MODE_SELECT, 1614 .cdb_size = 6, 1615 .usage_bits = {MODE_SELECT, 0x10, 0x00, 0x00, 1616 0xff, SCSI_CONTROL_MASK}, 1617 }; 1618 1619 static struct target_opcode_descriptor tcm_opcode_mode_select10 = { 1620 .support = SCSI_SUPPORT_FULL, 1621 .opcode = MODE_SELECT_10, 1622 .cdb_size = 10, 1623 .usage_bits = {MODE_SELECT_10, 0x10, 0x00, 0x00, 1624 0x00, 0x00, 0x00, 0xff, 1625 0xff, SCSI_CONTROL_MASK}, 1626 }; 1627 1628 static struct target_opcode_descriptor tcm_opcode_mode_sense = { 1629 .support = SCSI_SUPPORT_FULL, 1630 .opcode = MODE_SENSE, 1631 .cdb_size = 6, 1632 .usage_bits = {MODE_SENSE, 0x08, 0xff, 0xff, 1633 0xff, SCSI_CONTROL_MASK}, 1634 }; 1635 1636 static struct target_opcode_descriptor tcm_opcode_mode_sense10 = { 1637 .support = SCSI_SUPPORT_FULL, 1638 .opcode = MODE_SENSE_10, 1639 .cdb_size = 10, 1640 .usage_bits = {MODE_SENSE_10, 0x18, 0xff, 0xff, 1641 0x00, 0x00, 0x00, 0xff, 1642 0xff, SCSI_CONTROL_MASK}, 1643 }; 1644 1645 static struct target_opcode_descriptor tcm_opcode_pri_read_keys = { 1646 .support = SCSI_SUPPORT_FULL, 1647 .serv_action_valid = 1, 1648 .opcode = PERSISTENT_RESERVE_IN, 1649 .service_action = PRI_READ_KEYS, 1650 .cdb_size = 10, 1651 .usage_bits = {PERSISTENT_RESERVE_IN, PRI_READ_KEYS, 0x00, 0x00, 1652 0x00, 0x00, 0x00, 0xff, 1653 0xff, SCSI_CONTROL_MASK}, 1654 }; 1655 1656 static struct target_opcode_descriptor tcm_opcode_pri_read_resrv = { 1657 .support = SCSI_SUPPORT_FULL, 1658 .serv_action_valid = 1, 1659 .opcode = PERSISTENT_RESERVE_IN, 1660 .service_action = PRI_READ_RESERVATION, 1661 .cdb_size = 10, 1662 .usage_bits = {PERSISTENT_RESERVE_IN, PRI_READ_RESERVATION, 0x00, 0x00, 1663 0x00, 0x00, 0x00, 0xff, 1664 0xff, SCSI_CONTROL_MASK}, 1665 }; 1666 1667 static bool tcm_is_pr_enabled(struct se_cmd *cmd) 1668 { 1669 struct se_device *dev = cmd->se_dev; 1670 1671 return dev->dev_attrib.emulate_pr; 1672 } 1673 1674 static struct target_opcode_descriptor tcm_opcode_pri_read_caps = { 1675 .support = SCSI_SUPPORT_FULL, 1676 .serv_action_valid = 1, 1677 .opcode = PERSISTENT_RESERVE_IN, 1678 .service_action = PRI_REPORT_CAPABILITIES, 1679 .cdb_size = 10, 1680 .usage_bits = {PERSISTENT_RESERVE_IN, PRI_REPORT_CAPABILITIES, 0x00, 0x00, 1681 0x00, 0x00, 0x00, 0xff, 1682 0xff, SCSI_CONTROL_MASK}, 1683 .enabled = tcm_is_pr_enabled, 1684 }; 1685 1686 static struct target_opcode_descriptor tcm_opcode_pri_read_full_status = { 1687 .support = SCSI_SUPPORT_FULL, 1688 .serv_action_valid = 1, 1689 .opcode = PERSISTENT_RESERVE_IN, 1690 .service_action = PRI_READ_FULL_STATUS, 1691 .cdb_size = 10, 1692 .usage_bits = {PERSISTENT_RESERVE_IN, PRI_READ_FULL_STATUS, 0x00, 0x00, 1693 0x00, 0x00, 0x00, 0xff, 1694 0xff, SCSI_CONTROL_MASK}, 1695 .enabled = tcm_is_pr_enabled, 1696 }; 1697 1698 static struct target_opcode_descriptor tcm_opcode_pro_register = { 1699 .support = SCSI_SUPPORT_FULL, 1700 .serv_action_valid = 1, 1701 .opcode = PERSISTENT_RESERVE_OUT, 1702 .service_action = PRO_REGISTER, 1703 .cdb_size = 10, 1704 .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_REGISTER, 0xff, 0x00, 1705 0x00, 0xff, 0xff, 0xff, 1706 0xff, SCSI_CONTROL_MASK}, 1707 .enabled = tcm_is_pr_enabled, 1708 }; 1709 1710 static struct target_opcode_descriptor tcm_opcode_pro_reserve = { 1711 .support = SCSI_SUPPORT_FULL, 1712 .serv_action_valid = 1, 1713 .opcode = PERSISTENT_RESERVE_OUT, 1714 .service_action = PRO_RESERVE, 1715 .cdb_size = 10, 1716 .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_RESERVE, 0xff, 0x00, 1717 0x00, 0xff, 0xff, 0xff, 1718 0xff, SCSI_CONTROL_MASK}, 1719 .enabled = tcm_is_pr_enabled, 1720 }; 1721 1722 static struct target_opcode_descriptor tcm_opcode_pro_release = { 1723 .support = SCSI_SUPPORT_FULL, 1724 .serv_action_valid = 1, 1725 .opcode = PERSISTENT_RESERVE_OUT, 1726 .service_action = PRO_RELEASE, 1727 .cdb_size = 10, 1728 .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_RELEASE, 0xff, 0x00, 1729 0x00, 0xff, 0xff, 0xff, 1730 0xff, SCSI_CONTROL_MASK}, 1731 .enabled = tcm_is_pr_enabled, 1732 }; 1733 1734 static struct target_opcode_descriptor tcm_opcode_pro_clear = { 1735 .support = SCSI_SUPPORT_FULL, 1736 .serv_action_valid = 1, 1737 .opcode = PERSISTENT_RESERVE_OUT, 1738 .service_action = PRO_CLEAR, 1739 .cdb_size = 10, 1740 .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_CLEAR, 0xff, 0x00, 1741 0x00, 0xff, 0xff, 0xff, 1742 0xff, SCSI_CONTROL_MASK}, 1743 .enabled = tcm_is_pr_enabled, 1744 }; 1745 1746 static struct target_opcode_descriptor tcm_opcode_pro_preempt = { 1747 .support = SCSI_SUPPORT_FULL, 1748 .serv_action_valid = 1, 1749 .opcode = PERSISTENT_RESERVE_OUT, 1750 .service_action = PRO_PREEMPT, 1751 .cdb_size = 10, 1752 .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_PREEMPT, 0xff, 0x00, 1753 0x00, 0xff, 0xff, 0xff, 1754 0xff, SCSI_CONTROL_MASK}, 1755 .enabled = tcm_is_pr_enabled, 1756 }; 1757 1758 static struct target_opcode_descriptor tcm_opcode_pro_preempt_abort = { 1759 .support = SCSI_SUPPORT_FULL, 1760 .serv_action_valid = 1, 1761 .opcode = PERSISTENT_RESERVE_OUT, 1762 .service_action = PRO_PREEMPT_AND_ABORT, 1763 .cdb_size = 10, 1764 .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_PREEMPT_AND_ABORT, 0xff, 0x00, 1765 0x00, 0xff, 0xff, 0xff, 1766 0xff, SCSI_CONTROL_MASK}, 1767 .enabled = tcm_is_pr_enabled, 1768 }; 1769 1770 static struct target_opcode_descriptor tcm_opcode_pro_reg_ign_exist = { 1771 .support = SCSI_SUPPORT_FULL, 1772 .serv_action_valid = 1, 1773 .opcode = PERSISTENT_RESERVE_OUT, 1774 .service_action = PRO_REGISTER_AND_IGNORE_EXISTING_KEY, 1775 .cdb_size = 10, 1776 .usage_bits = { 1777 PERSISTENT_RESERVE_OUT, PRO_REGISTER_AND_IGNORE_EXISTING_KEY, 1778 0xff, 0x00, 1779 0x00, 0xff, 0xff, 0xff, 1780 0xff, SCSI_CONTROL_MASK}, 1781 .enabled = tcm_is_pr_enabled, 1782 }; 1783 1784 static struct target_opcode_descriptor tcm_opcode_pro_register_move = { 1785 .support = SCSI_SUPPORT_FULL, 1786 .serv_action_valid = 1, 1787 .opcode = PERSISTENT_RESERVE_OUT, 1788 .service_action = PRO_REGISTER_AND_MOVE, 1789 .cdb_size = 10, 1790 .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_REGISTER_AND_MOVE, 0xff, 0x00, 1791 0x00, 0xff, 0xff, 0xff, 1792 0xff, SCSI_CONTROL_MASK}, 1793 .enabled = tcm_is_pr_enabled, 1794 }; 1795 1796 static bool tcm_is_scsi2_reservations_enabled(struct se_cmd *cmd) 1797 { 1798 struct se_device *dev = cmd->se_dev; 1799 1800 return dev->dev_attrib.emulate_pr; 1801 } 1802 1803 static struct target_opcode_descriptor tcm_opcode_release = { 1804 .support = SCSI_SUPPORT_FULL, 1805 .opcode = RELEASE, 1806 .cdb_size = 6, 1807 .usage_bits = {RELEASE, 0x00, 0x00, 0x00, 1808 0x00, SCSI_CONTROL_MASK}, 1809 .enabled = tcm_is_scsi2_reservations_enabled, 1810 }; 1811 1812 static struct target_opcode_descriptor tcm_opcode_release10 = { 1813 .support = SCSI_SUPPORT_FULL, 1814 .opcode = RELEASE_10, 1815 .cdb_size = 10, 1816 .usage_bits = {RELEASE_10, 0x00, 0x00, 0x00, 1817 0x00, 0x00, 0x00, 0xff, 1818 0xff, SCSI_CONTROL_MASK}, 1819 .enabled = tcm_is_scsi2_reservations_enabled, 1820 }; 1821 1822 static struct target_opcode_descriptor tcm_opcode_reserve = { 1823 .support = SCSI_SUPPORT_FULL, 1824 .opcode = RESERVE, 1825 .cdb_size = 6, 1826 .usage_bits = {RESERVE, 0x00, 0x00, 0x00, 1827 0x00, SCSI_CONTROL_MASK}, 1828 .enabled = tcm_is_scsi2_reservations_enabled, 1829 }; 1830 1831 static struct target_opcode_descriptor tcm_opcode_reserve10 = { 1832 .support = SCSI_SUPPORT_FULL, 1833 .opcode = RESERVE_10, 1834 .cdb_size = 10, 1835 .usage_bits = {RESERVE_10, 0x00, 0x00, 0x00, 1836 0x00, 0x00, 0x00, 0xff, 1837 0xff, SCSI_CONTROL_MASK}, 1838 .enabled = tcm_is_scsi2_reservations_enabled, 1839 }; 1840 1841 static struct target_opcode_descriptor tcm_opcode_request_sense = { 1842 .support = SCSI_SUPPORT_FULL, 1843 .opcode = REQUEST_SENSE, 1844 .cdb_size = 6, 1845 .usage_bits = {REQUEST_SENSE, 0x00, 0x00, 0x00, 1846 0xff, SCSI_CONTROL_MASK}, 1847 }; 1848 1849 static struct target_opcode_descriptor tcm_opcode_inquiry = { 1850 .support = SCSI_SUPPORT_FULL, 1851 .opcode = INQUIRY, 1852 .cdb_size = 6, 1853 .usage_bits = {INQUIRY, 0x01, 0xff, 0xff, 1854 0xff, SCSI_CONTROL_MASK}, 1855 }; 1856 1857 static bool tcm_is_3pc_enabled(struct se_cmd *cmd) 1858 { 1859 struct se_device *dev = cmd->se_dev; 1860 1861 return dev->dev_attrib.emulate_3pc; 1862 } 1863 1864 static struct target_opcode_descriptor tcm_opcode_extended_copy_lid1 = { 1865 .support = SCSI_SUPPORT_FULL, 1866 .serv_action_valid = 1, 1867 .opcode = EXTENDED_COPY, 1868 .cdb_size = 16, 1869 .usage_bits = {EXTENDED_COPY, 0x00, 0x00, 0x00, 1870 0x00, 0x00, 0x00, 0x00, 1871 0x00, 0x00, 0xff, 0xff, 1872 0xff, 0xff, 0x00, SCSI_CONTROL_MASK}, 1873 .enabled = tcm_is_3pc_enabled, 1874 }; 1875 1876 static struct target_opcode_descriptor tcm_opcode_rcv_copy_res_op_params = { 1877 .support = SCSI_SUPPORT_FULL, 1878 .serv_action_valid = 1, 1879 .opcode = RECEIVE_COPY_RESULTS, 1880 .service_action = RCR_SA_OPERATING_PARAMETERS, 1881 .cdb_size = 16, 1882 .usage_bits = {RECEIVE_COPY_RESULTS, RCR_SA_OPERATING_PARAMETERS, 1883 0x00, 0x00, 1884 0x00, 0x00, 0x00, 0x00, 1885 0x00, 0x00, 0xff, 0xff, 1886 0xff, 0xff, 0x00, SCSI_CONTROL_MASK}, 1887 .enabled = tcm_is_3pc_enabled, 1888 }; 1889 1890 static struct target_opcode_descriptor tcm_opcode_report_luns = { 1891 .support = SCSI_SUPPORT_FULL, 1892 .opcode = REPORT_LUNS, 1893 .cdb_size = 12, 1894 .usage_bits = {REPORT_LUNS, 0x00, 0xff, 0x00, 1895 0x00, 0x00, 0xff, 0xff, 1896 0xff, 0xff, 0x00, SCSI_CONTROL_MASK}, 1897 }; 1898 1899 static struct target_opcode_descriptor tcm_opcode_test_unit_ready = { 1900 .support = SCSI_SUPPORT_FULL, 1901 .opcode = TEST_UNIT_READY, 1902 .cdb_size = 6, 1903 .usage_bits = {TEST_UNIT_READY, 0x00, 0x00, 0x00, 1904 0x00, SCSI_CONTROL_MASK}, 1905 }; 1906 1907 static struct target_opcode_descriptor tcm_opcode_report_target_pgs = { 1908 .support = SCSI_SUPPORT_FULL, 1909 .serv_action_valid = 1, 1910 .opcode = MAINTENANCE_IN, 1911 .service_action = MI_REPORT_TARGET_PGS, 1912 .cdb_size = 12, 1913 .usage_bits = {MAINTENANCE_IN, 0xE0 | MI_REPORT_TARGET_PGS, 0x00, 0x00, 1914 0x00, 0x00, 0xff, 0xff, 1915 0xff, 0xff, 0x00, SCSI_CONTROL_MASK}, 1916 }; 1917 1918 1919 static bool spc_rsoc_enabled(struct se_cmd *cmd) 1920 { 1921 struct se_device *dev = cmd->se_dev; 1922 1923 return dev->dev_attrib.emulate_rsoc; 1924 } 1925 1926 static struct target_opcode_descriptor tcm_opcode_report_supp_opcodes = { 1927 .support = SCSI_SUPPORT_FULL, 1928 .serv_action_valid = 1, 1929 .opcode = MAINTENANCE_IN, 1930 .service_action = MI_REPORT_SUPPORTED_OPERATION_CODES, 1931 .cdb_size = 12, 1932 .usage_bits = {MAINTENANCE_IN, MI_REPORT_SUPPORTED_OPERATION_CODES, 1933 0x87, 0xff, 1934 0xff, 0xff, 0xff, 0xff, 1935 0xff, 0xff, 0x00, SCSI_CONTROL_MASK}, 1936 .enabled = spc_rsoc_enabled, 1937 }; 1938 1939 static bool tcm_is_set_tpg_enabled(struct se_cmd *cmd) 1940 { 1941 struct t10_alua_tg_pt_gp *l_tg_pt_gp; 1942 struct se_lun *l_lun = cmd->se_lun; 1943 1944 rcu_read_lock(); 1945 l_tg_pt_gp = rcu_dereference(l_lun->lun_tg_pt_gp); 1946 if (!l_tg_pt_gp) { 1947 rcu_read_unlock(); 1948 return false; 1949 } 1950 if (!(l_tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA)) { 1951 rcu_read_unlock(); 1952 return false; 1953 } 1954 rcu_read_unlock(); 1955 1956 return true; 1957 } 1958 1959 static struct target_opcode_descriptor tcm_opcode_set_tpg = { 1960 .support = SCSI_SUPPORT_FULL, 1961 .serv_action_valid = 1, 1962 .opcode = MAINTENANCE_OUT, 1963 .service_action = MO_SET_TARGET_PGS, 1964 .cdb_size = 12, 1965 .usage_bits = {MAINTENANCE_OUT, MO_SET_TARGET_PGS, 0x00, 0x00, 1966 0x00, 0x00, 0xff, 0xff, 1967 0xff, 0xff, 0x00, SCSI_CONTROL_MASK}, 1968 .enabled = tcm_is_set_tpg_enabled, 1969 }; 1970 1971 static struct target_opcode_descriptor *tcm_supported_opcodes[] = { 1972 &tcm_opcode_read6, 1973 &tcm_opcode_read10, 1974 &tcm_opcode_read12, 1975 &tcm_opcode_read16, 1976 &tcm_opcode_write6, 1977 &tcm_opcode_write10, 1978 &tcm_opcode_write_verify10, 1979 &tcm_opcode_write12, 1980 &tcm_opcode_write16, 1981 &tcm_opcode_write_verify16, 1982 &tcm_opcode_write_same32, 1983 &tcm_opcode_compare_write, 1984 &tcm_opcode_read_capacity, 1985 &tcm_opcode_read_capacity16, 1986 &tcm_opcode_read_report_refferals, 1987 &tcm_opcode_sync_cache, 1988 &tcm_opcode_sync_cache16, 1989 &tcm_opcode_unmap, 1990 &tcm_opcode_write_same, 1991 &tcm_opcode_write_same16, 1992 &tcm_opcode_verify, 1993 &tcm_opcode_verify16, 1994 &tcm_opcode_start_stop, 1995 &tcm_opcode_mode_select, 1996 &tcm_opcode_mode_select10, 1997 &tcm_opcode_mode_sense, 1998 &tcm_opcode_mode_sense10, 1999 &tcm_opcode_pri_read_keys, 2000 &tcm_opcode_pri_read_resrv, 2001 &tcm_opcode_pri_read_caps, 2002 &tcm_opcode_pri_read_full_status, 2003 &tcm_opcode_pro_register, 2004 &tcm_opcode_pro_reserve, 2005 &tcm_opcode_pro_release, 2006 &tcm_opcode_pro_clear, 2007 &tcm_opcode_pro_preempt, 2008 &tcm_opcode_pro_preempt_abort, 2009 &tcm_opcode_pro_reg_ign_exist, 2010 &tcm_opcode_pro_register_move, 2011 &tcm_opcode_release, 2012 &tcm_opcode_release10, 2013 &tcm_opcode_reserve, 2014 &tcm_opcode_reserve10, 2015 &tcm_opcode_request_sense, 2016 &tcm_opcode_inquiry, 2017 &tcm_opcode_extended_copy_lid1, 2018 &tcm_opcode_rcv_copy_res_op_params, 2019 &tcm_opcode_report_luns, 2020 &tcm_opcode_test_unit_ready, 2021 &tcm_opcode_report_target_pgs, 2022 &tcm_opcode_report_supp_opcodes, 2023 &tcm_opcode_set_tpg, 2024 }; 2025 2026 static int 2027 spc_rsoc_encode_command_timeouts_descriptor(unsigned char *buf, u8 ctdp, 2028 struct target_opcode_descriptor *descr) 2029 { 2030 if (!ctdp) 2031 return 0; 2032 2033 put_unaligned_be16(0xa, buf); 2034 buf[3] = descr->specific_timeout; 2035 put_unaligned_be32(descr->nominal_timeout, &buf[4]); 2036 put_unaligned_be32(descr->recommended_timeout, &buf[8]); 2037 2038 return 12; 2039 } 2040 2041 static int 2042 spc_rsoc_encode_command_descriptor(unsigned char *buf, u8 ctdp, 2043 struct target_opcode_descriptor *descr) 2044 { 2045 int td_size = 0; 2046 2047 buf[0] = descr->opcode; 2048 2049 put_unaligned_be16(descr->service_action, &buf[2]); 2050 2051 buf[5] = (ctdp << 1) | descr->serv_action_valid; 2052 put_unaligned_be16(descr->cdb_size, &buf[6]); 2053 2054 td_size = spc_rsoc_encode_command_timeouts_descriptor(&buf[8], ctdp, 2055 descr); 2056 2057 return 8 + td_size; 2058 } 2059 2060 static int 2061 spc_rsoc_encode_one_command_descriptor(unsigned char *buf, u8 ctdp, 2062 struct target_opcode_descriptor *descr, 2063 struct se_device *dev) 2064 { 2065 int td_size = 0; 2066 2067 if (!descr) { 2068 buf[1] = (ctdp << 7) | SCSI_SUPPORT_NOT_SUPPORTED; 2069 return 2; 2070 } 2071 2072 buf[1] = (ctdp << 7) | SCSI_SUPPORT_FULL; 2073 put_unaligned_be16(descr->cdb_size, &buf[2]); 2074 memcpy(&buf[4], descr->usage_bits, descr->cdb_size); 2075 if (descr->update_usage_bits) 2076 descr->update_usage_bits(&buf[4], dev); 2077 2078 td_size = spc_rsoc_encode_command_timeouts_descriptor( 2079 &buf[4 + descr->cdb_size], ctdp, descr); 2080 2081 return 4 + descr->cdb_size + td_size; 2082 } 2083 2084 static sense_reason_t 2085 spc_rsoc_get_descr(struct se_cmd *cmd, struct target_opcode_descriptor **opcode) 2086 { 2087 struct target_opcode_descriptor *descr; 2088 struct se_session *sess = cmd->se_sess; 2089 unsigned char *cdb = cmd->t_task_cdb; 2090 u8 opts = cdb[2] & 0x3; 2091 u8 requested_opcode; 2092 u16 requested_sa; 2093 int i; 2094 2095 requested_opcode = cdb[3]; 2096 requested_sa = ((u16)cdb[4]) << 8 | cdb[5]; 2097 *opcode = NULL; 2098 2099 if (opts > 3) { 2100 pr_debug("TARGET_CORE[%s]: Invalid REPORT SUPPORTED OPERATION CODES" 2101 " with unsupported REPORTING OPTIONS %#x for 0x%08llx from %s\n", 2102 cmd->se_tfo->fabric_name, opts, 2103 cmd->se_lun->unpacked_lun, 2104 sess->se_node_acl->initiatorname); 2105 return TCM_INVALID_CDB_FIELD; 2106 } 2107 2108 for (i = 0; i < ARRAY_SIZE(tcm_supported_opcodes); i++) { 2109 descr = tcm_supported_opcodes[i]; 2110 if (descr->opcode != requested_opcode) 2111 continue; 2112 2113 switch (opts) { 2114 case 0x1: 2115 /* 2116 * If the REQUESTED OPERATION CODE field specifies an 2117 * operation code for which the device server implements 2118 * service actions, then the device server shall 2119 * terminate the command with CHECK CONDITION status, 2120 * with the sense key set to ILLEGAL REQUEST, and the 2121 * additional sense code set to INVALID FIELD IN CDB 2122 */ 2123 if (descr->serv_action_valid) 2124 return TCM_INVALID_CDB_FIELD; 2125 2126 if (!descr->enabled || descr->enabled(cmd)) 2127 *opcode = descr; 2128 break; 2129 case 0x2: 2130 /* 2131 * If the REQUESTED OPERATION CODE field specifies an 2132 * operation code for which the device server does not 2133 * implement service actions, then the device server 2134 * shall terminate the command with CHECK CONDITION 2135 * status, with the sense key set to ILLEGAL REQUEST, 2136 * and the additional sense code set to INVALID FIELD IN CDB. 2137 */ 2138 if (descr->serv_action_valid && 2139 descr->service_action == requested_sa) { 2140 if (!descr->enabled || descr->enabled(cmd)) 2141 *opcode = descr; 2142 } else if (!descr->serv_action_valid) 2143 return TCM_INVALID_CDB_FIELD; 2144 break; 2145 case 0x3: 2146 /* 2147 * The command support data for the operation code and 2148 * service action a specified in the REQUESTED OPERATION 2149 * CODE field and REQUESTED SERVICE ACTION field shall 2150 * be returned in the one_command parameter data format. 2151 */ 2152 if (descr->service_action == requested_sa) 2153 if (!descr->enabled || descr->enabled(cmd)) 2154 *opcode = descr; 2155 break; 2156 } 2157 } 2158 2159 return 0; 2160 } 2161 2162 static sense_reason_t 2163 spc_emulate_report_supp_op_codes(struct se_cmd *cmd) 2164 { 2165 int descr_num = ARRAY_SIZE(tcm_supported_opcodes); 2166 struct target_opcode_descriptor *descr = NULL; 2167 unsigned char *cdb = cmd->t_task_cdb; 2168 u8 rctd = (cdb[2] >> 7) & 0x1; 2169 unsigned char *buf = NULL; 2170 int response_length = 0; 2171 u8 opts = cdb[2] & 0x3; 2172 unsigned char *rbuf; 2173 sense_reason_t ret = 0; 2174 int i; 2175 2176 if (!cmd->se_dev->dev_attrib.emulate_rsoc) 2177 return TCM_UNSUPPORTED_SCSI_OPCODE; 2178 2179 rbuf = transport_kmap_data_sg(cmd); 2180 if (cmd->data_length && !rbuf) { 2181 ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2182 goto out; 2183 } 2184 2185 if (opts == 0) 2186 response_length = 4 + (8 + rctd * 12) * descr_num; 2187 else { 2188 ret = spc_rsoc_get_descr(cmd, &descr); 2189 if (ret) 2190 goto out; 2191 2192 if (descr) 2193 response_length = 4 + descr->cdb_size + rctd * 12; 2194 else 2195 response_length = 2; 2196 } 2197 2198 buf = kzalloc(response_length, GFP_KERNEL); 2199 if (!buf) { 2200 ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2201 goto out; 2202 } 2203 response_length = 0; 2204 2205 if (opts == 0) { 2206 response_length += 4; 2207 2208 for (i = 0; i < ARRAY_SIZE(tcm_supported_opcodes); i++) { 2209 descr = tcm_supported_opcodes[i]; 2210 if (descr->enabled && !descr->enabled(cmd)) 2211 continue; 2212 2213 response_length += spc_rsoc_encode_command_descriptor( 2214 &buf[response_length], rctd, descr); 2215 } 2216 put_unaligned_be32(response_length - 3, buf); 2217 } else { 2218 response_length = spc_rsoc_encode_one_command_descriptor( 2219 &buf[response_length], rctd, descr, 2220 cmd->se_dev); 2221 } 2222 2223 memcpy(rbuf, buf, min_t(u32, response_length, cmd->data_length)); 2224 out: 2225 kfree(buf); 2226 transport_kunmap_data_sg(cmd); 2227 2228 if (!ret) 2229 target_complete_cmd_with_length(cmd, SAM_STAT_GOOD, response_length); 2230 return ret; 2231 } 2232 2233 sense_reason_t 2234 spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) 2235 { 2236 struct se_device *dev = cmd->se_dev; 2237 unsigned char *cdb = cmd->t_task_cdb; 2238 2239 if (!dev->dev_attrib.emulate_pr && 2240 ((cdb[0] == PERSISTENT_RESERVE_IN) || 2241 (cdb[0] == PERSISTENT_RESERVE_OUT) || 2242 (cdb[0] == RELEASE || cdb[0] == RELEASE_10) || 2243 (cdb[0] == RESERVE || cdb[0] == RESERVE_10))) { 2244 return TCM_UNSUPPORTED_SCSI_OPCODE; 2245 } 2246 2247 switch (cdb[0]) { 2248 case MODE_SELECT: 2249 *size = cdb[4]; 2250 cmd->execute_cmd = spc_emulate_modeselect; 2251 break; 2252 case MODE_SELECT_10: 2253 *size = get_unaligned_be16(&cdb[7]); 2254 cmd->execute_cmd = spc_emulate_modeselect; 2255 break; 2256 case MODE_SENSE: 2257 *size = cdb[4]; 2258 cmd->execute_cmd = spc_emulate_modesense; 2259 break; 2260 case MODE_SENSE_10: 2261 *size = get_unaligned_be16(&cdb[7]); 2262 cmd->execute_cmd = spc_emulate_modesense; 2263 break; 2264 case LOG_SELECT: 2265 case LOG_SENSE: 2266 *size = get_unaligned_be16(&cdb[7]); 2267 break; 2268 case PERSISTENT_RESERVE_IN: 2269 *size = get_unaligned_be16(&cdb[7]); 2270 cmd->execute_cmd = target_scsi3_emulate_pr_in; 2271 break; 2272 case PERSISTENT_RESERVE_OUT: 2273 *size = get_unaligned_be32(&cdb[5]); 2274 cmd->execute_cmd = target_scsi3_emulate_pr_out; 2275 break; 2276 case RELEASE: 2277 case RELEASE_10: 2278 if (cdb[0] == RELEASE_10) 2279 *size = get_unaligned_be16(&cdb[7]); 2280 else 2281 *size = cmd->data_length; 2282 2283 cmd->execute_cmd = target_scsi2_reservation_release; 2284 break; 2285 case RESERVE: 2286 case RESERVE_10: 2287 /* 2288 * The SPC-2 RESERVE does not contain a size in the SCSI CDB. 2289 * Assume the passthrough or $FABRIC_MOD will tell us about it. 2290 */ 2291 if (cdb[0] == RESERVE_10) 2292 *size = get_unaligned_be16(&cdb[7]); 2293 else 2294 *size = cmd->data_length; 2295 2296 cmd->execute_cmd = target_scsi2_reservation_reserve; 2297 break; 2298 case REQUEST_SENSE: 2299 *size = cdb[4]; 2300 cmd->execute_cmd = spc_emulate_request_sense; 2301 break; 2302 case INQUIRY: 2303 *size = get_unaligned_be16(&cdb[3]); 2304 2305 /* 2306 * Do implicit HEAD_OF_QUEUE processing for INQUIRY. 2307 * See spc4r17 section 5.3 2308 */ 2309 cmd->sam_task_attr = TCM_HEAD_TAG; 2310 cmd->execute_cmd = spc_emulate_inquiry; 2311 break; 2312 case SECURITY_PROTOCOL_IN: 2313 case SECURITY_PROTOCOL_OUT: 2314 *size = get_unaligned_be32(&cdb[6]); 2315 break; 2316 case EXTENDED_COPY: 2317 *size = get_unaligned_be32(&cdb[10]); 2318 cmd->execute_cmd = target_do_xcopy; 2319 break; 2320 case RECEIVE_COPY_RESULTS: 2321 *size = get_unaligned_be32(&cdb[10]); 2322 cmd->execute_cmd = target_do_receive_copy_results; 2323 break; 2324 case READ_ATTRIBUTE: 2325 case WRITE_ATTRIBUTE: 2326 *size = get_unaligned_be32(&cdb[10]); 2327 break; 2328 case RECEIVE_DIAGNOSTIC: 2329 case SEND_DIAGNOSTIC: 2330 *size = get_unaligned_be16(&cdb[3]); 2331 break; 2332 case WRITE_BUFFER: 2333 *size = get_unaligned_be24(&cdb[6]); 2334 break; 2335 case REPORT_LUNS: 2336 cmd->execute_cmd = spc_emulate_report_luns; 2337 *size = get_unaligned_be32(&cdb[6]); 2338 /* 2339 * Do implicit HEAD_OF_QUEUE processing for REPORT_LUNS 2340 * See spc4r17 section 5.3 2341 */ 2342 cmd->sam_task_attr = TCM_HEAD_TAG; 2343 break; 2344 case TEST_UNIT_READY: 2345 cmd->execute_cmd = spc_emulate_testunitready; 2346 *size = 0; 2347 break; 2348 case MAINTENANCE_IN: 2349 if (dev->transport->get_device_type(dev) != TYPE_ROM) { 2350 /* 2351 * MAINTENANCE_IN from SCC-2 2352 * Check for emulated MI_REPORT_TARGET_PGS 2353 */ 2354 if ((cdb[1] & 0x1f) == MI_REPORT_TARGET_PGS) { 2355 cmd->execute_cmd = 2356 target_emulate_report_target_port_groups; 2357 } 2358 if ((cdb[1] & 0x1f) == 2359 MI_REPORT_SUPPORTED_OPERATION_CODES) 2360 cmd->execute_cmd = 2361 spc_emulate_report_supp_op_codes; 2362 *size = get_unaligned_be32(&cdb[6]); 2363 } else { 2364 /* 2365 * GPCMD_SEND_KEY from multi media commands 2366 */ 2367 *size = get_unaligned_be16(&cdb[8]); 2368 } 2369 break; 2370 case MAINTENANCE_OUT: 2371 if (dev->transport->get_device_type(dev) != TYPE_ROM) { 2372 /* 2373 * MAINTENANCE_OUT from SCC-2 2374 * Check for emulated MO_SET_TARGET_PGS. 2375 */ 2376 if (cdb[1] == MO_SET_TARGET_PGS) { 2377 cmd->execute_cmd = 2378 target_emulate_set_target_port_groups; 2379 } 2380 *size = get_unaligned_be32(&cdb[6]); 2381 } else { 2382 /* 2383 * GPCMD_SEND_KEY from multi media commands 2384 */ 2385 *size = get_unaligned_be16(&cdb[8]); 2386 } 2387 break; 2388 default: 2389 return TCM_UNSUPPORTED_SCSI_OPCODE; 2390 } 2391 2392 return 0; 2393 } 2394 EXPORT_SYMBOL(spc_parse_cdb); 2395