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