1 /* 2 * SCSI Primary Commands (SPC) parsing and emulation. 3 * 4 * (c) Copyright 2002-2013 Datera, Inc. 5 * 6 * Nicholas A. Bellinger <nab@kernel.org> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 21 */ 22 23 #include <linux/kernel.h> 24 #include <linux/module.h> 25 #include <asm/unaligned.h> 26 27 #include <scsi/scsi.h> 28 #include <scsi/scsi_tcq.h> 29 30 #include <target/target_core_base.h> 31 #include <target/target_core_backend.h> 32 #include <target/target_core_fabric.h> 33 34 #include "target_core_internal.h" 35 #include "target_core_alua.h" 36 #include "target_core_pr.h" 37 #include "target_core_ua.h" 38 #include "target_core_xcopy.h" 39 40 static void spc_fill_alua_data(struct se_port *port, unsigned char *buf) 41 { 42 struct t10_alua_tg_pt_gp *tg_pt_gp; 43 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; 44 45 /* 46 * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS. 47 */ 48 buf[5] = 0x80; 49 50 /* 51 * Set TPGS field for explicit and/or implicit ALUA access type 52 * and opteration. 53 * 54 * See spc4r17 section 6.4.2 Table 135 55 */ 56 if (!port) 57 return; 58 tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; 59 if (!tg_pt_gp_mem) 60 return; 61 62 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 63 tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; 64 if (tg_pt_gp) 65 buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; 66 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 67 } 68 69 sense_reason_t 70 spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char *buf) 71 { 72 struct se_lun *lun = cmd->se_lun; 73 struct se_device *dev = cmd->se_dev; 74 struct se_session *sess = cmd->se_sess; 75 76 /* Set RMB (removable media) for tape devices */ 77 if (dev->transport->get_device_type(dev) == TYPE_TAPE) 78 buf[1] = 0x80; 79 80 buf[2] = 0x05; /* SPC-3 */ 81 82 /* 83 * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2 84 * 85 * SPC4 says: 86 * A RESPONSE DATA FORMAT field set to 2h indicates that the 87 * standard INQUIRY data is in the format defined in this 88 * standard. Response data format values less than 2h are 89 * obsolete. Response data format values greater than 2h are 90 * reserved. 91 */ 92 buf[3] = 2; 93 94 /* 95 * Enable SCCS and TPGS fields for Emulated ALUA 96 */ 97 spc_fill_alua_data(lun->lun_sep, buf); 98 99 /* 100 * Set Third-Party Copy (3PC) bit to indicate support for EXTENDED_COPY 101 */ 102 if (dev->dev_attrib.emulate_3pc) 103 buf[5] |= 0x8; 104 /* 105 * Set Protection (PROTECT) bit when DIF has been enabled on the 106 * device, and the transport supports VERIFY + PASS. 107 */ 108 if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) { 109 if (dev->dev_attrib.pi_prot_type) 110 buf[5] |= 0x1; 111 } 112 113 buf[7] = 0x2; /* CmdQue=1 */ 114 115 memcpy(&buf[8], "LIO-ORG ", 8); 116 memset(&buf[16], 0x20, 16); 117 memcpy(&buf[16], dev->t10_wwn.model, 118 min_t(size_t, strlen(dev->t10_wwn.model), 16)); 119 memcpy(&buf[32], dev->t10_wwn.revision, 120 min_t(size_t, strlen(dev->t10_wwn.revision), 4)); 121 buf[4] = 31; /* Set additional length to 31 */ 122 123 return 0; 124 } 125 EXPORT_SYMBOL(spc_emulate_inquiry_std); 126 127 /* unit serial number */ 128 static sense_reason_t 129 spc_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) 130 { 131 struct se_device *dev = cmd->se_dev; 132 u16 len; 133 134 if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { 135 len = sprintf(&buf[4], "%s", dev->t10_wwn.unit_serial); 136 len++; /* Extra Byte for NULL Terminator */ 137 buf[3] = len; 138 } 139 return 0; 140 } 141 142 void spc_parse_naa_6h_vendor_specific(struct se_device *dev, 143 unsigned char *buf) 144 { 145 unsigned char *p = &dev->t10_wwn.unit_serial[0]; 146 int cnt; 147 bool next = true; 148 149 /* 150 * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on 151 * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field 152 * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION 153 * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL 154 * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure 155 * per device uniqeness. 156 */ 157 for (cnt = 0; *p && cnt < 13; p++) { 158 int val = hex_to_bin(*p); 159 160 if (val < 0) 161 continue; 162 163 if (next) { 164 next = false; 165 buf[cnt++] |= val; 166 } else { 167 next = true; 168 buf[cnt] = val << 4; 169 } 170 } 171 } 172 173 /* 174 * Device identification VPD, for a complete list of 175 * DESIGNATOR TYPEs see spc4r17 Table 459. 176 */ 177 sense_reason_t 178 spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) 179 { 180 struct se_device *dev = cmd->se_dev; 181 struct se_lun *lun = cmd->se_lun; 182 struct se_port *port = NULL; 183 struct se_portal_group *tpg = NULL; 184 struct t10_alua_lu_gp_member *lu_gp_mem; 185 struct t10_alua_tg_pt_gp *tg_pt_gp; 186 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; 187 unsigned char *prod = &dev->t10_wwn.model[0]; 188 u32 prod_len; 189 u32 unit_serial_len, off = 0; 190 u16 len = 0, id_len; 191 192 off = 4; 193 194 /* 195 * NAA IEEE Registered Extended Assigned designator format, see 196 * spc4r17 section 7.7.3.6.5 197 * 198 * We depend upon a target_core_mod/ConfigFS provided 199 * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial 200 * value in order to return the NAA id. 201 */ 202 if (!(dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL)) 203 goto check_t10_vend_desc; 204 205 /* CODE SET == Binary */ 206 buf[off++] = 0x1; 207 208 /* Set ASSOCIATION == addressed logical unit: 0)b */ 209 buf[off] = 0x00; 210 211 /* Identifier/Designator type == NAA identifier */ 212 buf[off++] |= 0x3; 213 off++; 214 215 /* Identifier/Designator length */ 216 buf[off++] = 0x10; 217 218 /* 219 * Start NAA IEEE Registered Extended Identifier/Designator 220 */ 221 buf[off++] = (0x6 << 4); 222 223 /* 224 * Use OpenFabrics IEEE Company ID: 00 14 05 225 */ 226 buf[off++] = 0x01; 227 buf[off++] = 0x40; 228 buf[off] = (0x5 << 4); 229 230 /* 231 * Return ConfigFS Unit Serial Number information for 232 * VENDOR_SPECIFIC_IDENTIFIER and 233 * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION 234 */ 235 spc_parse_naa_6h_vendor_specific(dev, &buf[off]); 236 237 len = 20; 238 off = (len + 4); 239 240 check_t10_vend_desc: 241 /* 242 * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 243 */ 244 id_len = 8; /* For Vendor field */ 245 prod_len = 4; /* For VPD Header */ 246 prod_len += 8; /* For Vendor field */ 247 prod_len += strlen(prod); 248 prod_len++; /* For : */ 249 250 if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { 251 unit_serial_len = strlen(&dev->t10_wwn.unit_serial[0]); 252 unit_serial_len++; /* For NULL Terminator */ 253 254 id_len += sprintf(&buf[off+12], "%s:%s", prod, 255 &dev->t10_wwn.unit_serial[0]); 256 } 257 buf[off] = 0x2; /* ASCII */ 258 buf[off+1] = 0x1; /* T10 Vendor ID */ 259 buf[off+2] = 0x0; 260 memcpy(&buf[off+4], "LIO-ORG", 8); 261 /* Extra Byte for NULL Terminator */ 262 id_len++; 263 /* Identifier Length */ 264 buf[off+3] = id_len; 265 /* Header size for Designation descriptor */ 266 len += (id_len + 4); 267 off += (id_len + 4); 268 /* 269 * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD 270 */ 271 port = lun->lun_sep; 272 if (port) { 273 struct t10_alua_lu_gp *lu_gp; 274 u32 padding, scsi_name_len, scsi_target_len; 275 u16 lu_gp_id = 0; 276 u16 tg_pt_gp_id = 0; 277 u16 tpgt; 278 279 tpg = port->sep_tpg; 280 /* 281 * Relative target port identifer, see spc4r17 282 * section 7.7.3.7 283 * 284 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 285 * section 7.5.1 Table 362 286 */ 287 buf[off] = 288 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); 289 buf[off++] |= 0x1; /* CODE SET == Binary */ 290 buf[off] = 0x80; /* Set PIV=1 */ 291 /* Set ASSOCIATION == target port: 01b */ 292 buf[off] |= 0x10; 293 /* DESIGNATOR TYPE == Relative target port identifer */ 294 buf[off++] |= 0x4; 295 off++; /* Skip over Reserved */ 296 buf[off++] = 4; /* DESIGNATOR LENGTH */ 297 /* Skip over Obsolete field in RTPI payload 298 * in Table 472 */ 299 off += 2; 300 buf[off++] = ((port->sep_rtpi >> 8) & 0xff); 301 buf[off++] = (port->sep_rtpi & 0xff); 302 len += 8; /* Header size + Designation descriptor */ 303 /* 304 * Target port group identifier, see spc4r17 305 * section 7.7.3.8 306 * 307 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 308 * section 7.5.1 Table 362 309 */ 310 tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; 311 if (!tg_pt_gp_mem) 312 goto check_lu_gp; 313 314 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 315 tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; 316 if (!tg_pt_gp) { 317 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 318 goto check_lu_gp; 319 } 320 tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; 321 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 322 323 buf[off] = 324 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); 325 buf[off++] |= 0x1; /* CODE SET == Binary */ 326 buf[off] = 0x80; /* Set PIV=1 */ 327 /* Set ASSOCIATION == target port: 01b */ 328 buf[off] |= 0x10; 329 /* DESIGNATOR TYPE == Target port group identifier */ 330 buf[off++] |= 0x5; 331 off++; /* Skip over Reserved */ 332 buf[off++] = 4; /* DESIGNATOR LENGTH */ 333 off += 2; /* Skip over Reserved Field */ 334 buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); 335 buf[off++] = (tg_pt_gp_id & 0xff); 336 len += 8; /* Header size + Designation descriptor */ 337 /* 338 * Logical Unit Group identifier, see spc4r17 339 * section 7.7.3.8 340 */ 341 check_lu_gp: 342 lu_gp_mem = dev->dev_alua_lu_gp_mem; 343 if (!lu_gp_mem) 344 goto check_scsi_name; 345 346 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 347 lu_gp = lu_gp_mem->lu_gp; 348 if (!lu_gp) { 349 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 350 goto check_scsi_name; 351 } 352 lu_gp_id = lu_gp->lu_gp_id; 353 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 354 355 buf[off++] |= 0x1; /* CODE SET == Binary */ 356 /* DESIGNATOR TYPE == Logical Unit Group identifier */ 357 buf[off++] |= 0x6; 358 off++; /* Skip over Reserved */ 359 buf[off++] = 4; /* DESIGNATOR LENGTH */ 360 off += 2; /* Skip over Reserved Field */ 361 buf[off++] = ((lu_gp_id >> 8) & 0xff); 362 buf[off++] = (lu_gp_id & 0xff); 363 len += 8; /* Header size + Designation descriptor */ 364 /* 365 * SCSI name string designator, see spc4r17 366 * section 7.7.3.11 367 * 368 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 369 * section 7.5.1 Table 362 370 */ 371 check_scsi_name: 372 buf[off] = 373 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); 374 buf[off++] |= 0x3; /* CODE SET == UTF-8 */ 375 buf[off] = 0x80; /* Set PIV=1 */ 376 /* Set ASSOCIATION == target port: 01b */ 377 buf[off] |= 0x10; 378 /* DESIGNATOR TYPE == SCSI name string */ 379 buf[off++] |= 0x8; 380 off += 2; /* Skip over Reserved and length */ 381 /* 382 * SCSI name string identifer containing, $FABRIC_MOD 383 * dependent information. For LIO-Target and iSCSI 384 * Target Port, this means "<iSCSI name>,t,0x<TPGT> in 385 * UTF-8 encoding. 386 */ 387 tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); 388 scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", 389 tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); 390 scsi_name_len += 1 /* Include NULL terminator */; 391 /* 392 * The null-terminated, null-padded (see 4.4.2) SCSI 393 * NAME STRING field contains a UTF-8 format string. 394 * The number of bytes in the SCSI NAME STRING field 395 * (i.e., the value in the DESIGNATOR LENGTH field) 396 * shall be no larger than 256 and shall be a multiple 397 * of four. 398 */ 399 padding = ((-scsi_name_len) & 3); 400 if (padding) 401 scsi_name_len += padding; 402 if (scsi_name_len > 256) 403 scsi_name_len = 256; 404 405 buf[off-1] = scsi_name_len; 406 off += scsi_name_len; 407 /* Header size + Designation descriptor */ 408 len += (scsi_name_len + 4); 409 410 /* 411 * Target device designator 412 */ 413 buf[off] = 414 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); 415 buf[off++] |= 0x3; /* CODE SET == UTF-8 */ 416 buf[off] = 0x80; /* Set PIV=1 */ 417 /* Set ASSOCIATION == target device: 10b */ 418 buf[off] |= 0x20; 419 /* DESIGNATOR TYPE == SCSI name string */ 420 buf[off++] |= 0x8; 421 off += 2; /* Skip over Reserved and length */ 422 /* 423 * SCSI name string identifer containing, $FABRIC_MOD 424 * dependent information. For LIO-Target and iSCSI 425 * Target Port, this means "<iSCSI name>" in 426 * UTF-8 encoding. 427 */ 428 scsi_target_len = sprintf(&buf[off], "%s", 429 tpg->se_tpg_tfo->tpg_get_wwn(tpg)); 430 scsi_target_len += 1 /* Include NULL terminator */; 431 /* 432 * The null-terminated, null-padded (see 4.4.2) SCSI 433 * NAME STRING field contains a UTF-8 format string. 434 * The number of bytes in the SCSI NAME STRING field 435 * (i.e., the value in the DESIGNATOR LENGTH field) 436 * shall be no larger than 256 and shall be a multiple 437 * of four. 438 */ 439 padding = ((-scsi_target_len) & 3); 440 if (padding) 441 scsi_target_len += padding; 442 if (scsi_target_len > 256) 443 scsi_target_len = 256; 444 445 buf[off-1] = scsi_target_len; 446 off += scsi_target_len; 447 448 /* Header size + Designation descriptor */ 449 len += (scsi_target_len + 4); 450 } 451 buf[2] = ((len >> 8) & 0xff); 452 buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ 453 return 0; 454 } 455 EXPORT_SYMBOL(spc_emulate_evpd_83); 456 457 static bool 458 spc_check_dev_wce(struct se_device *dev) 459 { 460 bool wce = false; 461 462 if (dev->transport->get_write_cache) 463 wce = dev->transport->get_write_cache(dev); 464 else if (dev->dev_attrib.emulate_write_cache > 0) 465 wce = true; 466 467 return wce; 468 } 469 470 /* Extended INQUIRY Data VPD Page */ 471 static sense_reason_t 472 spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) 473 { 474 struct se_device *dev = cmd->se_dev; 475 struct se_session *sess = cmd->se_sess; 476 477 buf[3] = 0x3c; 478 /* 479 * Set GRD_CHK + REF_CHK for TYPE1 protection, or GRD_CHK 480 * only for TYPE3 protection. 481 */ 482 if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) { 483 if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE1_PROT) 484 buf[4] = 0x5; 485 else if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE3_PROT) 486 buf[4] = 0x4; 487 } 488 489 /* Set HEADSUP, ORDSUP, SIMPSUP */ 490 buf[5] = 0x07; 491 492 /* If WriteCache emulation is enabled, set V_SUP */ 493 if (spc_check_dev_wce(dev)) 494 buf[6] = 0x01; 495 /* If an LBA map is present set R_SUP */ 496 spin_lock(&cmd->se_dev->t10_alua.lba_map_lock); 497 if (!list_empty(&dev->t10_alua.lba_map_list)) 498 buf[8] = 0x10; 499 spin_unlock(&cmd->se_dev->t10_alua.lba_map_lock); 500 return 0; 501 } 502 503 /* Block Limits VPD page */ 504 static sense_reason_t 505 spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) 506 { 507 struct se_device *dev = cmd->se_dev; 508 int have_tp = 0; 509 int opt, min; 510 511 /* 512 * Following spc3r22 section 6.5.3 Block Limits VPD page, when 513 * emulate_tpu=1 or emulate_tpws=1 we will be expect a 514 * different page length for Thin Provisioning. 515 */ 516 if (dev->dev_attrib.emulate_tpu || dev->dev_attrib.emulate_tpws) 517 have_tp = 1; 518 519 buf[0] = dev->transport->get_device_type(dev); 520 buf[3] = have_tp ? 0x3c : 0x10; 521 522 /* Set WSNZ to 1 */ 523 buf[4] = 0x01; 524 /* 525 * Set MAXIMUM COMPARE AND WRITE LENGTH 526 */ 527 if (dev->dev_attrib.emulate_caw) 528 buf[5] = 0x01; 529 530 /* 531 * Set OPTIMAL TRANSFER LENGTH GRANULARITY 532 */ 533 if (dev->transport->get_io_min && (min = dev->transport->get_io_min(dev))) 534 put_unaligned_be16(min / dev->dev_attrib.block_size, &buf[6]); 535 else 536 put_unaligned_be16(1, &buf[6]); 537 538 /* 539 * Set MAXIMUM TRANSFER LENGTH 540 */ 541 put_unaligned_be32(dev->dev_attrib.hw_max_sectors, &buf[8]); 542 543 /* 544 * Set OPTIMAL TRANSFER LENGTH 545 */ 546 if (dev->transport->get_io_opt && (opt = dev->transport->get_io_opt(dev))) 547 put_unaligned_be32(opt / dev->dev_attrib.block_size, &buf[12]); 548 else 549 put_unaligned_be32(dev->dev_attrib.optimal_sectors, &buf[12]); 550 551 /* 552 * Exit now if we don't support TP. 553 */ 554 if (!have_tp) 555 goto max_write_same; 556 557 /* 558 * Set MAXIMUM UNMAP LBA COUNT 559 */ 560 put_unaligned_be32(dev->dev_attrib.max_unmap_lba_count, &buf[20]); 561 562 /* 563 * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT 564 */ 565 put_unaligned_be32(dev->dev_attrib.max_unmap_block_desc_count, 566 &buf[24]); 567 568 /* 569 * Set OPTIMAL UNMAP GRANULARITY 570 */ 571 put_unaligned_be32(dev->dev_attrib.unmap_granularity, &buf[28]); 572 573 /* 574 * UNMAP GRANULARITY ALIGNMENT 575 */ 576 put_unaligned_be32(dev->dev_attrib.unmap_granularity_alignment, 577 &buf[32]); 578 if (dev->dev_attrib.unmap_granularity_alignment != 0) 579 buf[32] |= 0x80; /* Set the UGAVALID bit */ 580 581 /* 582 * MAXIMUM WRITE SAME LENGTH 583 */ 584 max_write_same: 585 put_unaligned_be64(dev->dev_attrib.max_write_same_len, &buf[36]); 586 587 return 0; 588 } 589 590 /* Block Device Characteristics VPD page */ 591 static sense_reason_t 592 spc_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) 593 { 594 struct se_device *dev = cmd->se_dev; 595 596 buf[0] = dev->transport->get_device_type(dev); 597 buf[3] = 0x3c; 598 buf[5] = dev->dev_attrib.is_nonrot ? 1 : 0; 599 600 return 0; 601 } 602 603 /* Thin Provisioning VPD */ 604 static sense_reason_t 605 spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) 606 { 607 struct se_device *dev = cmd->se_dev; 608 609 /* 610 * From spc3r22 section 6.5.4 Thin Provisioning VPD page: 611 * 612 * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to 613 * zero, then the page length shall be set to 0004h. If the DP bit 614 * is set to one, then the page length shall be set to the value 615 * defined in table 162. 616 */ 617 buf[0] = dev->transport->get_device_type(dev); 618 619 /* 620 * Set Hardcoded length mentioned above for DP=0 621 */ 622 put_unaligned_be16(0x0004, &buf[2]); 623 624 /* 625 * The THRESHOLD EXPONENT field indicates the threshold set size in 626 * LBAs as a power of 2 (i.e., the threshold set size is equal to 627 * 2(threshold exponent)). 628 * 629 * Note that this is currently set to 0x00 as mkp says it will be 630 * changing again. We can enable this once it has settled in T10 631 * and is actually used by Linux/SCSI ML code. 632 */ 633 buf[4] = 0x00; 634 635 /* 636 * A TPU bit set to one indicates that the device server supports 637 * the UNMAP command (see 5.25). A TPU bit set to zero indicates 638 * that the device server does not support the UNMAP command. 639 */ 640 if (dev->dev_attrib.emulate_tpu != 0) 641 buf[5] = 0x80; 642 643 /* 644 * A TPWS bit set to one indicates that the device server supports 645 * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. 646 * A TPWS bit set to zero indicates that the device server does not 647 * support the use of the WRITE SAME (16) command to unmap LBAs. 648 */ 649 if (dev->dev_attrib.emulate_tpws != 0) 650 buf[5] |= 0x40; 651 652 return 0; 653 } 654 655 /* Referrals VPD page */ 656 static sense_reason_t 657 spc_emulate_evpd_b3(struct se_cmd *cmd, unsigned char *buf) 658 { 659 struct se_device *dev = cmd->se_dev; 660 661 buf[0] = dev->transport->get_device_type(dev); 662 buf[3] = 0x0c; 663 put_unaligned_be32(dev->t10_alua.lba_map_segment_size, &buf[8]); 664 put_unaligned_be32(dev->t10_alua.lba_map_segment_multiplier, &buf[12]); 665 666 return 0; 667 } 668 669 static sense_reason_t 670 spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); 671 672 static struct { 673 uint8_t page; 674 sense_reason_t (*emulate)(struct se_cmd *, unsigned char *); 675 } evpd_handlers[] = { 676 { .page = 0x00, .emulate = spc_emulate_evpd_00 }, 677 { .page = 0x80, .emulate = spc_emulate_evpd_80 }, 678 { .page = 0x83, .emulate = spc_emulate_evpd_83 }, 679 { .page = 0x86, .emulate = spc_emulate_evpd_86 }, 680 { .page = 0xb0, .emulate = spc_emulate_evpd_b0 }, 681 { .page = 0xb1, .emulate = spc_emulate_evpd_b1 }, 682 { .page = 0xb2, .emulate = spc_emulate_evpd_b2 }, 683 { .page = 0xb3, .emulate = spc_emulate_evpd_b3 }, 684 }; 685 686 /* supported vital product data pages */ 687 static sense_reason_t 688 spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) 689 { 690 int p; 691 692 /* 693 * Only report the INQUIRY EVPD=1 pages after a valid NAA 694 * Registered Extended LUN WWN has been set via ConfigFS 695 * during device creation/restart. 696 */ 697 if (cmd->se_dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { 698 buf[3] = ARRAY_SIZE(evpd_handlers); 699 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) 700 buf[p + 4] = evpd_handlers[p].page; 701 } 702 703 return 0; 704 } 705 706 static sense_reason_t 707 spc_emulate_inquiry(struct se_cmd *cmd) 708 { 709 struct se_device *dev = cmd->se_dev; 710 struct se_portal_group *tpg = cmd->se_lun->lun_sep->sep_tpg; 711 unsigned char *rbuf; 712 unsigned char *cdb = cmd->t_task_cdb; 713 unsigned char *buf; 714 sense_reason_t ret; 715 int p; 716 int len = 0; 717 718 buf = kzalloc(SE_INQUIRY_BUF, GFP_KERNEL); 719 if (!buf) { 720 pr_err("Unable to allocate response buffer for INQUIRY\n"); 721 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 722 } 723 724 if (dev == tpg->tpg_virt_lun0.lun_se_dev) 725 buf[0] = 0x3f; /* Not connected */ 726 else 727 buf[0] = dev->transport->get_device_type(dev); 728 729 if (!(cdb[1] & 0x1)) { 730 if (cdb[2]) { 731 pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n", 732 cdb[2]); 733 ret = TCM_INVALID_CDB_FIELD; 734 goto out; 735 } 736 737 ret = spc_emulate_inquiry_std(cmd, buf); 738 len = buf[4] + 5; 739 goto out; 740 } 741 742 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) { 743 if (cdb[2] == evpd_handlers[p].page) { 744 buf[1] = cdb[2]; 745 ret = evpd_handlers[p].emulate(cmd, buf); 746 len = get_unaligned_be16(&buf[2]) + 4; 747 goto out; 748 } 749 } 750 751 pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); 752 ret = TCM_INVALID_CDB_FIELD; 753 754 out: 755 rbuf = transport_kmap_data_sg(cmd); 756 if (rbuf) { 757 memcpy(rbuf, buf, min_t(u32, SE_INQUIRY_BUF, cmd->data_length)); 758 transport_kunmap_data_sg(cmd); 759 } 760 kfree(buf); 761 762 if (!ret) 763 target_complete_cmd_with_length(cmd, GOOD, len); 764 return ret; 765 } 766 767 static int spc_modesense_rwrecovery(struct se_cmd *cmd, u8 pc, u8 *p) 768 { 769 p[0] = 0x01; 770 p[1] = 0x0a; 771 772 /* No changeable values for now */ 773 if (pc == 1) 774 goto out; 775 776 out: 777 return 12; 778 } 779 780 static int spc_modesense_control(struct se_cmd *cmd, u8 pc, u8 *p) 781 { 782 struct se_device *dev = cmd->se_dev; 783 struct se_session *sess = cmd->se_sess; 784 785 p[0] = 0x0a; 786 p[1] = 0x0a; 787 788 /* No changeable values for now */ 789 if (pc == 1) 790 goto out; 791 792 p[2] = 2; 793 /* 794 * From spc4r23, 7.4.7 Control mode page 795 * 796 * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies 797 * restrictions on the algorithm used for reordering commands 798 * having the SIMPLE task attribute (see SAM-4). 799 * 800 * Table 368 -- QUEUE ALGORITHM MODIFIER field 801 * Code Description 802 * 0h Restricted reordering 803 * 1h Unrestricted reordering allowed 804 * 2h to 7h Reserved 805 * 8h to Fh Vendor specific 806 * 807 * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that 808 * the device server shall order the processing sequence of commands 809 * having the SIMPLE task attribute such that data integrity is maintained 810 * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol 811 * requests is halted at any time, the final value of all data observable 812 * on the medium shall be the same as if all the commands had been processed 813 * with the ORDERED task attribute). 814 * 815 * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the 816 * device server may reorder the processing sequence of commands having the 817 * SIMPLE task attribute in any manner. Any data integrity exposures related to 818 * command sequence order shall be explicitly handled by the application client 819 * through the selection of appropriate ommands and task attributes. 820 */ 821 p[3] = (dev->dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; 822 /* 823 * From spc4r17, section 7.4.6 Control mode Page 824 * 825 * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b 826 * 827 * 00b: The logical unit shall clear any unit attention condition 828 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION 829 * status and shall not establish a unit attention condition when a com- 830 * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT 831 * status. 832 * 833 * 10b: The logical unit shall not clear any unit attention condition 834 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION 835 * status and shall not establish a unit attention condition when 836 * a command is completed with BUSY, TASK SET FULL, or RESERVATION 837 * CONFLICT status. 838 * 839 * 11b a The logical unit shall not clear any unit attention condition 840 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION 841 * status and shall establish a unit attention condition for the 842 * initiator port associated with the I_T nexus on which the BUSY, 843 * TASK SET FULL, or RESERVATION CONFLICT status is being returned. 844 * Depending on the status, the additional sense code shall be set to 845 * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS 846 * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE 847 * command, a unit attention condition shall be established only once 848 * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless 849 * to the number of commands completed with one of those status codes. 850 */ 851 p[4] = (dev->dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : 852 (dev->dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; 853 /* 854 * From spc4r17, section 7.4.6 Control mode Page 855 * 856 * Task Aborted Status (TAS) bit set to zero. 857 * 858 * A task aborted status (TAS) bit set to zero specifies that aborted 859 * tasks shall be terminated by the device server without any response 860 * to the application client. A TAS bit set to one specifies that tasks 861 * aborted by the actions of an I_T nexus other than the I_T nexus on 862 * which the command was received shall be completed with TASK ABORTED 863 * status (see SAM-4). 864 */ 865 p[5] = (dev->dev_attrib.emulate_tas) ? 0x40 : 0x00; 866 /* 867 * From spc4r30, section 7.5.7 Control mode page 868 * 869 * Application Tag Owner (ATO) bit set to one. 870 * 871 * If the ATO bit is set to one the device server shall not modify the 872 * LOGICAL BLOCK APPLICATION TAG field and, depending on the protection 873 * type, shall not modify the contents of the LOGICAL BLOCK REFERENCE 874 * TAG field. 875 */ 876 if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) { 877 if (dev->dev_attrib.pi_prot_type) 878 p[5] |= 0x80; 879 } 880 881 p[8] = 0xff; 882 p[9] = 0xff; 883 p[11] = 30; 884 885 out: 886 return 12; 887 } 888 889 static int spc_modesense_caching(struct se_cmd *cmd, u8 pc, u8 *p) 890 { 891 struct se_device *dev = cmd->se_dev; 892 893 p[0] = 0x08; 894 p[1] = 0x12; 895 896 /* No changeable values for now */ 897 if (pc == 1) 898 goto out; 899 900 if (spc_check_dev_wce(dev)) 901 p[2] = 0x04; /* Write Cache Enable */ 902 p[12] = 0x20; /* Disabled Read Ahead */ 903 904 out: 905 return 20; 906 } 907 908 static int spc_modesense_informational_exceptions(struct se_cmd *cmd, u8 pc, unsigned char *p) 909 { 910 p[0] = 0x1c; 911 p[1] = 0x0a; 912 913 /* No changeable values for now */ 914 if (pc == 1) 915 goto out; 916 917 out: 918 return 12; 919 } 920 921 static struct { 922 uint8_t page; 923 uint8_t subpage; 924 int (*emulate)(struct se_cmd *, u8, unsigned char *); 925 } modesense_handlers[] = { 926 { .page = 0x01, .subpage = 0x00, .emulate = spc_modesense_rwrecovery }, 927 { .page = 0x08, .subpage = 0x00, .emulate = spc_modesense_caching }, 928 { .page = 0x0a, .subpage = 0x00, .emulate = spc_modesense_control }, 929 { .page = 0x1c, .subpage = 0x00, .emulate = spc_modesense_informational_exceptions }, 930 }; 931 932 static void spc_modesense_write_protect(unsigned char *buf, int type) 933 { 934 /* 935 * I believe that the WP bit (bit 7) in the mode header is the same for 936 * all device types.. 937 */ 938 switch (type) { 939 case TYPE_DISK: 940 case TYPE_TAPE: 941 default: 942 buf[0] |= 0x80; /* WP bit */ 943 break; 944 } 945 } 946 947 static void spc_modesense_dpofua(unsigned char *buf, int type) 948 { 949 switch (type) { 950 case TYPE_DISK: 951 buf[0] |= 0x10; /* DPOFUA bit */ 952 break; 953 default: 954 break; 955 } 956 } 957 958 static int spc_modesense_blockdesc(unsigned char *buf, u64 blocks, u32 block_size) 959 { 960 *buf++ = 8; 961 put_unaligned_be32(min(blocks, 0xffffffffull), buf); 962 buf += 4; 963 put_unaligned_be32(block_size, buf); 964 return 9; 965 } 966 967 static int spc_modesense_long_blockdesc(unsigned char *buf, u64 blocks, u32 block_size) 968 { 969 if (blocks <= 0xffffffff) 970 return spc_modesense_blockdesc(buf + 3, blocks, block_size) + 3; 971 972 *buf++ = 1; /* LONGLBA */ 973 buf += 2; 974 *buf++ = 16; 975 put_unaligned_be64(blocks, buf); 976 buf += 12; 977 put_unaligned_be32(block_size, buf); 978 979 return 17; 980 } 981 982 static sense_reason_t spc_emulate_modesense(struct se_cmd *cmd) 983 { 984 struct se_device *dev = cmd->se_dev; 985 char *cdb = cmd->t_task_cdb; 986 unsigned char buf[SE_MODE_PAGE_BUF], *rbuf; 987 int type = dev->transport->get_device_type(dev); 988 int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10); 989 bool dbd = !!(cdb[1] & 0x08); 990 bool llba = ten ? !!(cdb[1] & 0x10) : false; 991 u8 pc = cdb[2] >> 6; 992 u8 page = cdb[2] & 0x3f; 993 u8 subpage = cdb[3]; 994 int length = 0; 995 int ret; 996 int i; 997 998 memset(buf, 0, SE_MODE_PAGE_BUF); 999 1000 /* 1001 * Skip over MODE DATA LENGTH + MEDIUM TYPE fields to byte 3 for 1002 * MODE_SENSE_10 and byte 2 for MODE_SENSE (6). 1003 */ 1004 length = ten ? 3 : 2; 1005 1006 /* DEVICE-SPECIFIC PARAMETER */ 1007 if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || 1008 (cmd->se_deve && 1009 (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) 1010 spc_modesense_write_protect(&buf[length], type); 1011 1012 if ((spc_check_dev_wce(dev)) && 1013 (dev->dev_attrib.emulate_fua_write > 0)) 1014 spc_modesense_dpofua(&buf[length], type); 1015 1016 ++length; 1017 1018 /* BLOCK DESCRIPTOR */ 1019 1020 /* 1021 * For now we only include a block descriptor for disk (SBC) 1022 * devices; other command sets use a slightly different format. 1023 */ 1024 if (!dbd && type == TYPE_DISK) { 1025 u64 blocks = dev->transport->get_blocks(dev); 1026 u32 block_size = dev->dev_attrib.block_size; 1027 1028 if (ten) { 1029 if (llba) { 1030 length += spc_modesense_long_blockdesc(&buf[length], 1031 blocks, block_size); 1032 } else { 1033 length += 3; 1034 length += spc_modesense_blockdesc(&buf[length], 1035 blocks, block_size); 1036 } 1037 } else { 1038 length += spc_modesense_blockdesc(&buf[length], blocks, 1039 block_size); 1040 } 1041 } else { 1042 if (ten) 1043 length += 4; 1044 else 1045 length += 1; 1046 } 1047 1048 if (page == 0x3f) { 1049 if (subpage != 0x00 && subpage != 0xff) { 1050 pr_warn("MODE_SENSE: Invalid subpage code: 0x%02x\n", subpage); 1051 return TCM_INVALID_CDB_FIELD; 1052 } 1053 1054 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) { 1055 /* 1056 * Tricky way to say all subpage 00h for 1057 * subpage==0, all subpages for subpage==0xff 1058 * (and we just checked above that those are 1059 * the only two possibilities). 1060 */ 1061 if ((modesense_handlers[i].subpage & ~subpage) == 0) { 1062 ret = modesense_handlers[i].emulate(cmd, pc, &buf[length]); 1063 if (!ten && length + ret >= 255) 1064 break; 1065 length += ret; 1066 } 1067 } 1068 1069 goto set_length; 1070 } 1071 1072 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) 1073 if (modesense_handlers[i].page == page && 1074 modesense_handlers[i].subpage == subpage) { 1075 length += modesense_handlers[i].emulate(cmd, pc, &buf[length]); 1076 goto set_length; 1077 } 1078 1079 /* 1080 * We don't intend to implement: 1081 * - obsolete page 03h "format parameters" (checked by Solaris) 1082 */ 1083 if (page != 0x03) 1084 pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", 1085 page, subpage); 1086 1087 return TCM_UNKNOWN_MODE_PAGE; 1088 1089 set_length: 1090 if (ten) 1091 put_unaligned_be16(length - 2, buf); 1092 else 1093 buf[0] = length - 1; 1094 1095 rbuf = transport_kmap_data_sg(cmd); 1096 if (rbuf) { 1097 memcpy(rbuf, buf, min_t(u32, SE_MODE_PAGE_BUF, cmd->data_length)); 1098 transport_kunmap_data_sg(cmd); 1099 } 1100 1101 target_complete_cmd_with_length(cmd, GOOD, length); 1102 return 0; 1103 } 1104 1105 static sense_reason_t spc_emulate_modeselect(struct se_cmd *cmd) 1106 { 1107 char *cdb = cmd->t_task_cdb; 1108 bool ten = cdb[0] == MODE_SELECT_10; 1109 int off = ten ? 8 : 4; 1110 bool pf = !!(cdb[1] & 0x10); 1111 u8 page, subpage; 1112 unsigned char *buf; 1113 unsigned char tbuf[SE_MODE_PAGE_BUF]; 1114 int length; 1115 int ret = 0; 1116 int i; 1117 1118 if (!cmd->data_length) { 1119 target_complete_cmd(cmd, GOOD); 1120 return 0; 1121 } 1122 1123 if (cmd->data_length < off + 2) 1124 return TCM_PARAMETER_LIST_LENGTH_ERROR; 1125 1126 buf = transport_kmap_data_sg(cmd); 1127 if (!buf) 1128 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1129 1130 if (!pf) { 1131 ret = TCM_INVALID_CDB_FIELD; 1132 goto out; 1133 } 1134 1135 page = buf[off] & 0x3f; 1136 subpage = buf[off] & 0x40 ? buf[off + 1] : 0; 1137 1138 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) 1139 if (modesense_handlers[i].page == page && 1140 modesense_handlers[i].subpage == subpage) { 1141 memset(tbuf, 0, SE_MODE_PAGE_BUF); 1142 length = modesense_handlers[i].emulate(cmd, 0, tbuf); 1143 goto check_contents; 1144 } 1145 1146 ret = TCM_UNKNOWN_MODE_PAGE; 1147 goto out; 1148 1149 check_contents: 1150 if (cmd->data_length < off + length) { 1151 ret = TCM_PARAMETER_LIST_LENGTH_ERROR; 1152 goto out; 1153 } 1154 1155 if (memcmp(buf + off, tbuf, length)) 1156 ret = TCM_INVALID_PARAMETER_LIST; 1157 1158 out: 1159 transport_kunmap_data_sg(cmd); 1160 1161 if (!ret) 1162 target_complete_cmd(cmd, GOOD); 1163 return ret; 1164 } 1165 1166 static sense_reason_t spc_emulate_request_sense(struct se_cmd *cmd) 1167 { 1168 unsigned char *cdb = cmd->t_task_cdb; 1169 unsigned char *rbuf; 1170 u8 ua_asc = 0, ua_ascq = 0; 1171 unsigned char buf[SE_SENSE_BUF]; 1172 1173 memset(buf, 0, SE_SENSE_BUF); 1174 1175 if (cdb[1] & 0x01) { 1176 pr_err("REQUEST_SENSE description emulation not" 1177 " supported\n"); 1178 return TCM_INVALID_CDB_FIELD; 1179 } 1180 1181 rbuf = transport_kmap_data_sg(cmd); 1182 if (!rbuf) 1183 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1184 1185 if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) { 1186 /* 1187 * CURRENT ERROR, UNIT ATTENTION 1188 */ 1189 buf[0] = 0x70; 1190 buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; 1191 1192 /* 1193 * The Additional Sense Code (ASC) from the UNIT ATTENTION 1194 */ 1195 buf[SPC_ASC_KEY_OFFSET] = ua_asc; 1196 buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; 1197 buf[7] = 0x0A; 1198 } else { 1199 /* 1200 * CURRENT ERROR, NO SENSE 1201 */ 1202 buf[0] = 0x70; 1203 buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; 1204 1205 /* 1206 * NO ADDITIONAL SENSE INFORMATION 1207 */ 1208 buf[SPC_ASC_KEY_OFFSET] = 0x00; 1209 buf[7] = 0x0A; 1210 } 1211 1212 memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length)); 1213 transport_kunmap_data_sg(cmd); 1214 1215 target_complete_cmd(cmd, GOOD); 1216 return 0; 1217 } 1218 1219 sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd) 1220 { 1221 struct se_dev_entry *deve; 1222 struct se_session *sess = cmd->se_sess; 1223 unsigned char *buf; 1224 u32 lun_count = 0, offset = 8, i; 1225 1226 if (cmd->data_length < 16) { 1227 pr_warn("REPORT LUNS allocation length %u too small\n", 1228 cmd->data_length); 1229 return TCM_INVALID_CDB_FIELD; 1230 } 1231 1232 buf = transport_kmap_data_sg(cmd); 1233 if (!buf) 1234 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1235 1236 /* 1237 * If no struct se_session pointer is present, this struct se_cmd is 1238 * coming via a target_core_mod PASSTHROUGH op, and not through 1239 * a $FABRIC_MOD. In that case, report LUN=0 only. 1240 */ 1241 if (!sess) { 1242 int_to_scsilun(0, (struct scsi_lun *)&buf[offset]); 1243 lun_count = 1; 1244 goto done; 1245 } 1246 1247 spin_lock_irq(&sess->se_node_acl->device_list_lock); 1248 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 1249 deve = sess->se_node_acl->device_list[i]; 1250 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 1251 continue; 1252 /* 1253 * We determine the correct LUN LIST LENGTH even once we 1254 * have reached the initial allocation length. 1255 * See SPC2-R20 7.19. 1256 */ 1257 lun_count++; 1258 if ((offset + 8) > cmd->data_length) 1259 continue; 1260 1261 int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]); 1262 offset += 8; 1263 } 1264 spin_unlock_irq(&sess->se_node_acl->device_list_lock); 1265 1266 /* 1267 * See SPC3 r07, page 159. 1268 */ 1269 done: 1270 lun_count *= 8; 1271 buf[0] = ((lun_count >> 24) & 0xff); 1272 buf[1] = ((lun_count >> 16) & 0xff); 1273 buf[2] = ((lun_count >> 8) & 0xff); 1274 buf[3] = (lun_count & 0xff); 1275 transport_kunmap_data_sg(cmd); 1276 1277 target_complete_cmd_with_length(cmd, GOOD, 8 + lun_count * 8); 1278 return 0; 1279 } 1280 EXPORT_SYMBOL(spc_emulate_report_luns); 1281 1282 static sense_reason_t 1283 spc_emulate_testunitready(struct se_cmd *cmd) 1284 { 1285 target_complete_cmd(cmd, GOOD); 1286 return 0; 1287 } 1288 1289 sense_reason_t 1290 spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) 1291 { 1292 struct se_device *dev = cmd->se_dev; 1293 unsigned char *cdb = cmd->t_task_cdb; 1294 1295 switch (cdb[0]) { 1296 case MODE_SELECT: 1297 *size = cdb[4]; 1298 cmd->execute_cmd = spc_emulate_modeselect; 1299 break; 1300 case MODE_SELECT_10: 1301 *size = (cdb[7] << 8) + cdb[8]; 1302 cmd->execute_cmd = spc_emulate_modeselect; 1303 break; 1304 case MODE_SENSE: 1305 *size = cdb[4]; 1306 cmd->execute_cmd = spc_emulate_modesense; 1307 break; 1308 case MODE_SENSE_10: 1309 *size = (cdb[7] << 8) + cdb[8]; 1310 cmd->execute_cmd = spc_emulate_modesense; 1311 break; 1312 case LOG_SELECT: 1313 case LOG_SENSE: 1314 *size = (cdb[7] << 8) + cdb[8]; 1315 break; 1316 case PERSISTENT_RESERVE_IN: 1317 *size = (cdb[7] << 8) + cdb[8]; 1318 cmd->execute_cmd = target_scsi3_emulate_pr_in; 1319 break; 1320 case PERSISTENT_RESERVE_OUT: 1321 *size = (cdb[7] << 8) + cdb[8]; 1322 cmd->execute_cmd = target_scsi3_emulate_pr_out; 1323 break; 1324 case RELEASE: 1325 case RELEASE_10: 1326 if (cdb[0] == RELEASE_10) 1327 *size = (cdb[7] << 8) | cdb[8]; 1328 else 1329 *size = cmd->data_length; 1330 1331 cmd->execute_cmd = target_scsi2_reservation_release; 1332 break; 1333 case RESERVE: 1334 case RESERVE_10: 1335 /* 1336 * The SPC-2 RESERVE does not contain a size in the SCSI CDB. 1337 * Assume the passthrough or $FABRIC_MOD will tell us about it. 1338 */ 1339 if (cdb[0] == RESERVE_10) 1340 *size = (cdb[7] << 8) | cdb[8]; 1341 else 1342 *size = cmd->data_length; 1343 1344 cmd->execute_cmd = target_scsi2_reservation_reserve; 1345 break; 1346 case REQUEST_SENSE: 1347 *size = cdb[4]; 1348 cmd->execute_cmd = spc_emulate_request_sense; 1349 break; 1350 case INQUIRY: 1351 *size = (cdb[3] << 8) + cdb[4]; 1352 1353 /* 1354 * Do implicit HEAD_OF_QUEUE processing for INQUIRY. 1355 * See spc4r17 section 5.3 1356 */ 1357 cmd->sam_task_attr = TCM_HEAD_TAG; 1358 cmd->execute_cmd = spc_emulate_inquiry; 1359 break; 1360 case SECURITY_PROTOCOL_IN: 1361 case SECURITY_PROTOCOL_OUT: 1362 *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; 1363 break; 1364 case EXTENDED_COPY: 1365 *size = get_unaligned_be32(&cdb[10]); 1366 cmd->execute_cmd = target_do_xcopy; 1367 break; 1368 case RECEIVE_COPY_RESULTS: 1369 *size = get_unaligned_be32(&cdb[10]); 1370 cmd->execute_cmd = target_do_receive_copy_results; 1371 break; 1372 case READ_ATTRIBUTE: 1373 case WRITE_ATTRIBUTE: 1374 *size = (cdb[10] << 24) | (cdb[11] << 16) | 1375 (cdb[12] << 8) | cdb[13]; 1376 break; 1377 case RECEIVE_DIAGNOSTIC: 1378 case SEND_DIAGNOSTIC: 1379 *size = (cdb[3] << 8) | cdb[4]; 1380 break; 1381 case WRITE_BUFFER: 1382 *size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; 1383 break; 1384 case REPORT_LUNS: 1385 cmd->execute_cmd = spc_emulate_report_luns; 1386 *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; 1387 /* 1388 * Do implicit HEAD_OF_QUEUE processing for REPORT_LUNS 1389 * See spc4r17 section 5.3 1390 */ 1391 cmd->sam_task_attr = TCM_HEAD_TAG; 1392 break; 1393 case TEST_UNIT_READY: 1394 cmd->execute_cmd = spc_emulate_testunitready; 1395 *size = 0; 1396 break; 1397 case MAINTENANCE_IN: 1398 if (dev->transport->get_device_type(dev) != TYPE_ROM) { 1399 /* 1400 * MAINTENANCE_IN from SCC-2 1401 * Check for emulated MI_REPORT_TARGET_PGS 1402 */ 1403 if ((cdb[1] & 0x1f) == MI_REPORT_TARGET_PGS) { 1404 cmd->execute_cmd = 1405 target_emulate_report_target_port_groups; 1406 } 1407 *size = get_unaligned_be32(&cdb[6]); 1408 } else { 1409 /* 1410 * GPCMD_SEND_KEY from multi media commands 1411 */ 1412 *size = get_unaligned_be16(&cdb[8]); 1413 } 1414 break; 1415 case MAINTENANCE_OUT: 1416 if (dev->transport->get_device_type(dev) != TYPE_ROM) { 1417 /* 1418 * MAINTENANCE_OUT from SCC-2 1419 * Check for emulated MO_SET_TARGET_PGS. 1420 */ 1421 if (cdb[1] == MO_SET_TARGET_PGS) { 1422 cmd->execute_cmd = 1423 target_emulate_set_target_port_groups; 1424 } 1425 *size = get_unaligned_be32(&cdb[6]); 1426 } else { 1427 /* 1428 * GPCMD_SEND_KEY from multi media commands 1429 */ 1430 *size = get_unaligned_be16(&cdb[8]); 1431 } 1432 break; 1433 default: 1434 pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode" 1435 " 0x%02x, sending CHECK_CONDITION.\n", 1436 cmd->se_tfo->get_fabric_name(), cdb[0]); 1437 return TCM_UNSUPPORTED_SCSI_OPCODE; 1438 } 1439 1440 return 0; 1441 } 1442 EXPORT_SYMBOL(spc_parse_cdb); 1443