target_core_cdb.c revision 8359cf43b9dccddeebb0d247146719a14ce6371a
1/* 2 * CDB emulation for non-READ/WRITE commands. 3 * 4 * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc. 5 * Copyright (c) 2005, 2006, 2007 SBE, Inc. 6 * Copyright (c) 2007-2010 Rising Tide Systems 7 * Copyright (c) 2008-2010 Linux-iSCSI.org 8 * 9 * Nicholas A. Bellinger <nab@kernel.org> 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; either version 2 of the License, or 14 * (at your option) any later version. 15 * 16 * This program is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 24 */ 25 26#include <linux/kernel.h> 27#include <linux/module.h> 28#include <asm/unaligned.h> 29#include <scsi/scsi.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_ua.h" 37 38static void 39target_fill_alua_data(struct se_port *port, unsigned char *buf) 40{ 41 struct t10_alua_tg_pt_gp *tg_pt_gp; 42 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; 43 44 /* 45 * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS. 46 */ 47 buf[5] = 0x80; 48 49 /* 50 * Set TPGS field for explict and/or implict ALUA access type 51 * and opteration. 52 * 53 * See spc4r17 section 6.4.2 Table 135 54 */ 55 if (!port) 56 return; 57 tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; 58 if (!tg_pt_gp_mem) 59 return; 60 61 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 62 tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; 63 if (tg_pt_gp) 64 buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; 65 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 66} 67 68static int 69target_emulate_inquiry_std(struct se_cmd *cmd) 70{ 71 struct se_lun *lun = cmd->se_lun; 72 struct se_device *dev = cmd->se_dev; 73 struct se_portal_group *tpg = lun->lun_sep->sep_tpg; 74 unsigned char *buf; 75 76 /* 77 * Make sure we at least have 6 bytes of INQUIRY response 78 * payload going back for EVPD=0 79 */ 80 if (cmd->data_length < 6) { 81 pr_err("SCSI Inquiry payload length: %u" 82 " too small for EVPD=0\n", cmd->data_length); 83 return -EINVAL; 84 } 85 86 buf = transport_kmap_first_data_page(cmd); 87 88 if (dev == tpg->tpg_virt_lun0.lun_se_dev) { 89 buf[0] = 0x3f; /* Not connected */ 90 } else { 91 buf[0] = dev->transport->get_device_type(dev); 92 if (buf[0] == TYPE_TAPE) 93 buf[1] = 0x80; 94 } 95 buf[2] = dev->transport->get_device_rev(dev); 96 97 /* 98 * Enable SCCS and TPGS fields for Emulated ALUA 99 */ 100 if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) 101 target_fill_alua_data(lun->lun_sep, buf); 102 103 if (cmd->data_length < 8) { 104 buf[4] = 1; /* Set additional length to 1 */ 105 goto out; 106 } 107 108 buf[7] = 0x32; /* Sync=1 and CmdQue=1 */ 109 110 /* 111 * Do not include vendor, product, reversion info in INQUIRY 112 * response payload for cdbs with a small allocation length. 113 */ 114 if (cmd->data_length < 36) { 115 buf[4] = 3; /* Set additional length to 3 */ 116 goto out; 117 } 118 119 snprintf(&buf[8], 8, "LIO-ORG"); 120 snprintf(&buf[16], 16, "%s", dev->se_sub_dev->t10_wwn.model); 121 snprintf(&buf[32], 4, "%s", dev->se_sub_dev->t10_wwn.revision); 122 buf[4] = 31; /* Set additional length to 31 */ 123 124out: 125 transport_kunmap_first_data_page(cmd); 126 return 0; 127} 128 129/* unit serial number */ 130static int 131target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) 132{ 133 struct se_device *dev = cmd->se_dev; 134 u16 len = 0; 135 136 if (dev->se_sub_dev->su_dev_flags & 137 SDF_EMULATED_VPD_UNIT_SERIAL) { 138 u32 unit_serial_len; 139 140 unit_serial_len = strlen(dev->se_sub_dev->t10_wwn.unit_serial); 141 unit_serial_len++; /* For NULL Terminator */ 142 143 if (((len + 4) + unit_serial_len) > cmd->data_length) { 144 len += unit_serial_len; 145 buf[2] = ((len >> 8) & 0xff); 146 buf[3] = (len & 0xff); 147 return 0; 148 } 149 len += sprintf(&buf[4], "%s", 150 dev->se_sub_dev->t10_wwn.unit_serial); 151 len++; /* Extra Byte for NULL Terminator */ 152 buf[3] = len; 153 } 154 return 0; 155} 156 157static void 158target_parse_naa_6h_vendor_specific(struct se_device *dev, unsigned char *buf) 159{ 160 unsigned char *p = &dev->se_sub_dev->t10_wwn.unit_serial[0]; 161 int cnt; 162 bool next = true; 163 164 /* 165 * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on 166 * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field 167 * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION 168 * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL 169 * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure 170 * per device uniqeness. 171 */ 172 for (cnt = 0; *p && cnt < 13; p++) { 173 int val = hex_to_bin(*p); 174 175 if (val < 0) 176 continue; 177 178 if (next) { 179 next = false; 180 buf[cnt++] |= val; 181 } else { 182 next = true; 183 buf[cnt] = val << 4; 184 } 185 } 186} 187 188/* 189 * Device identification VPD, for a complete list of 190 * DESIGNATOR TYPEs see spc4r17 Table 459. 191 */ 192static int 193target_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) 194{ 195 struct se_device *dev = cmd->se_dev; 196 struct se_lun *lun = cmd->se_lun; 197 struct se_port *port = NULL; 198 struct se_portal_group *tpg = NULL; 199 struct t10_alua_lu_gp_member *lu_gp_mem; 200 struct t10_alua_tg_pt_gp *tg_pt_gp; 201 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; 202 unsigned char *prod = &dev->se_sub_dev->t10_wwn.model[0]; 203 u32 prod_len; 204 u32 unit_serial_len, off = 0; 205 u16 len = 0, id_len; 206 207 off = 4; 208 209 /* 210 * NAA IEEE Registered Extended Assigned designator format, see 211 * spc4r17 section 7.7.3.6.5 212 * 213 * We depend upon a target_core_mod/ConfigFS provided 214 * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial 215 * value in order to return the NAA id. 216 */ 217 if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL)) 218 goto check_t10_vend_desc; 219 220 if (off + 20 > cmd->data_length) 221 goto check_t10_vend_desc; 222 223 /* CODE SET == Binary */ 224 buf[off++] = 0x1; 225 226 /* Set ASSOCIATION == addressed logical unit: 0)b */ 227 buf[off] = 0x00; 228 229 /* Identifier/Designator type == NAA identifier */ 230 buf[off++] |= 0x3; 231 off++; 232 233 /* Identifier/Designator length */ 234 buf[off++] = 0x10; 235 236 /* 237 * Start NAA IEEE Registered Extended Identifier/Designator 238 */ 239 buf[off++] = (0x6 << 4); 240 241 /* 242 * Use OpenFabrics IEEE Company ID: 00 14 05 243 */ 244 buf[off++] = 0x01; 245 buf[off++] = 0x40; 246 buf[off] = (0x5 << 4); 247 248 /* 249 * Return ConfigFS Unit Serial Number information for 250 * VENDOR_SPECIFIC_IDENTIFIER and 251 * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION 252 */ 253 target_parse_naa_6h_vendor_specific(dev, &buf[off]); 254 255 len = 20; 256 off = (len + 4); 257 258check_t10_vend_desc: 259 /* 260 * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 261 */ 262 id_len = 8; /* For Vendor field */ 263 prod_len = 4; /* For VPD Header */ 264 prod_len += 8; /* For Vendor field */ 265 prod_len += strlen(prod); 266 prod_len++; /* For : */ 267 268 if (dev->se_sub_dev->su_dev_flags & 269 SDF_EMULATED_VPD_UNIT_SERIAL) { 270 unit_serial_len = 271 strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]); 272 unit_serial_len++; /* For NULL Terminator */ 273 274 if ((len + (id_len + 4) + 275 (prod_len + unit_serial_len)) > 276 cmd->data_length) { 277 len += (prod_len + unit_serial_len); 278 goto check_port; 279 } 280 id_len += sprintf(&buf[off+12], "%s:%s", prod, 281 &dev->se_sub_dev->t10_wwn.unit_serial[0]); 282 } 283 buf[off] = 0x2; /* ASCII */ 284 buf[off+1] = 0x1; /* T10 Vendor ID */ 285 buf[off+2] = 0x0; 286 memcpy(&buf[off+4], "LIO-ORG", 8); 287 /* Extra Byte for NULL Terminator */ 288 id_len++; 289 /* Identifier Length */ 290 buf[off+3] = id_len; 291 /* Header size for Designation descriptor */ 292 len += (id_len + 4); 293 off += (id_len + 4); 294 /* 295 * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD 296 */ 297check_port: 298 port = lun->lun_sep; 299 if (port) { 300 struct t10_alua_lu_gp *lu_gp; 301 u32 padding, scsi_name_len; 302 u16 lu_gp_id = 0; 303 u16 tg_pt_gp_id = 0; 304 u16 tpgt; 305 306 tpg = port->sep_tpg; 307 /* 308 * Relative target port identifer, see spc4r17 309 * section 7.7.3.7 310 * 311 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 312 * section 7.5.1 Table 362 313 */ 314 if (((len + 4) + 8) > cmd->data_length) { 315 len += 8; 316 goto check_tpgi; 317 } 318 buf[off] = 319 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); 320 buf[off++] |= 0x1; /* CODE SET == Binary */ 321 buf[off] = 0x80; /* Set PIV=1 */ 322 /* Set ASSOCIATION == target port: 01b */ 323 buf[off] |= 0x10; 324 /* DESIGNATOR TYPE == Relative target port identifer */ 325 buf[off++] |= 0x4; 326 off++; /* Skip over Reserved */ 327 buf[off++] = 4; /* DESIGNATOR LENGTH */ 328 /* Skip over Obsolete field in RTPI payload 329 * in Table 472 */ 330 off += 2; 331 buf[off++] = ((port->sep_rtpi >> 8) & 0xff); 332 buf[off++] = (port->sep_rtpi & 0xff); 333 len += 8; /* Header size + Designation descriptor */ 334 /* 335 * Target port group identifier, see spc4r17 336 * section 7.7.3.8 337 * 338 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 339 * section 7.5.1 Table 362 340 */ 341check_tpgi: 342 if (dev->se_sub_dev->t10_alua.alua_type != 343 SPC3_ALUA_EMULATED) 344 goto check_scsi_name; 345 346 if (((len + 4) + 8) > cmd->data_length) { 347 len += 8; 348 goto check_lu_gp; 349 } 350 tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; 351 if (!tg_pt_gp_mem) 352 goto check_lu_gp; 353 354 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 355 tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; 356 if (!tg_pt_gp) { 357 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 358 goto check_lu_gp; 359 } 360 tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; 361 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 362 363 buf[off] = 364 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); 365 buf[off++] |= 0x1; /* CODE SET == Binary */ 366 buf[off] = 0x80; /* Set PIV=1 */ 367 /* Set ASSOCIATION == target port: 01b */ 368 buf[off] |= 0x10; 369 /* DESIGNATOR TYPE == Target port group identifier */ 370 buf[off++] |= 0x5; 371 off++; /* Skip over Reserved */ 372 buf[off++] = 4; /* DESIGNATOR LENGTH */ 373 off += 2; /* Skip over Reserved Field */ 374 buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); 375 buf[off++] = (tg_pt_gp_id & 0xff); 376 len += 8; /* Header size + Designation descriptor */ 377 /* 378 * Logical Unit Group identifier, see spc4r17 379 * section 7.7.3.8 380 */ 381check_lu_gp: 382 if (((len + 4) + 8) > cmd->data_length) { 383 len += 8; 384 goto check_scsi_name; 385 } 386 lu_gp_mem = dev->dev_alua_lu_gp_mem; 387 if (!lu_gp_mem) 388 goto check_scsi_name; 389 390 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 391 lu_gp = lu_gp_mem->lu_gp; 392 if (!lu_gp) { 393 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 394 goto check_scsi_name; 395 } 396 lu_gp_id = lu_gp->lu_gp_id; 397 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 398 399 buf[off++] |= 0x1; /* CODE SET == Binary */ 400 /* DESIGNATOR TYPE == Logical Unit Group identifier */ 401 buf[off++] |= 0x6; 402 off++; /* Skip over Reserved */ 403 buf[off++] = 4; /* DESIGNATOR LENGTH */ 404 off += 2; /* Skip over Reserved Field */ 405 buf[off++] = ((lu_gp_id >> 8) & 0xff); 406 buf[off++] = (lu_gp_id & 0xff); 407 len += 8; /* Header size + Designation descriptor */ 408 /* 409 * SCSI name string designator, see spc4r17 410 * section 7.7.3.11 411 * 412 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 413 * section 7.5.1 Table 362 414 */ 415check_scsi_name: 416 scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg)); 417 /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */ 418 scsi_name_len += 10; 419 /* Check for 4-byte padding */ 420 padding = ((-scsi_name_len) & 3); 421 if (padding != 0) 422 scsi_name_len += padding; 423 /* Header size + Designation descriptor */ 424 scsi_name_len += 4; 425 426 if (((len + 4) + scsi_name_len) > cmd->data_length) { 427 len += scsi_name_len; 428 goto set_len; 429 } 430 buf[off] = 431 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); 432 buf[off++] |= 0x3; /* CODE SET == UTF-8 */ 433 buf[off] = 0x80; /* Set PIV=1 */ 434 /* Set ASSOCIATION == target port: 01b */ 435 buf[off] |= 0x10; 436 /* DESIGNATOR TYPE == SCSI name string */ 437 buf[off++] |= 0x8; 438 off += 2; /* Skip over Reserved and length */ 439 /* 440 * SCSI name string identifer containing, $FABRIC_MOD 441 * dependent information. For LIO-Target and iSCSI 442 * Target Port, this means "<iSCSI name>,t,0x<TPGT> in 443 * UTF-8 encoding. 444 */ 445 tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); 446 scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", 447 tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); 448 scsi_name_len += 1 /* Include NULL terminator */; 449 /* 450 * The null-terminated, null-padded (see 4.4.2) SCSI 451 * NAME STRING field contains a UTF-8 format string. 452 * The number of bytes in the SCSI NAME STRING field 453 * (i.e., the value in the DESIGNATOR LENGTH field) 454 * shall be no larger than 256 and shall be a multiple 455 * of four. 456 */ 457 if (padding) 458 scsi_name_len += padding; 459 460 buf[off-1] = scsi_name_len; 461 off += scsi_name_len; 462 /* Header size + Designation descriptor */ 463 len += (scsi_name_len + 4); 464 } 465set_len: 466 buf[2] = ((len >> 8) & 0xff); 467 buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ 468 return 0; 469} 470 471/* Extended INQUIRY Data VPD Page */ 472static int 473target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) 474{ 475 if (cmd->data_length < 60) 476 return 0; 477 478 buf[3] = 0x3c; 479 /* Set HEADSUP, ORDSUP, SIMPSUP */ 480 buf[5] = 0x07; 481 482 /* If WriteCache emulation is enabled, set V_SUP */ 483 if (cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) 484 buf[6] = 0x01; 485 return 0; 486} 487 488/* Block Limits VPD page */ 489static int 490target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) 491{ 492 struct se_device *dev = cmd->se_dev; 493 int have_tp = 0; 494 495 /* 496 * Following sbc3r22 section 6.5.3 Block Limits VPD page, when 497 * emulate_tpu=1 or emulate_tpws=1 we will be expect a 498 * different page length for Thin Provisioning. 499 */ 500 if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) 501 have_tp = 1; 502 503 if (cmd->data_length < (0x10 + 4)) { 504 pr_debug("Received data_length: %u" 505 " too small for EVPD 0xb0\n", 506 cmd->data_length); 507 return -EINVAL; 508 } 509 510 if (have_tp && cmd->data_length < (0x3c + 4)) { 511 pr_debug("Received data_length: %u" 512 " too small for TPE=1 EVPD 0xb0\n", 513 cmd->data_length); 514 have_tp = 0; 515 } 516 517 buf[0] = dev->transport->get_device_type(dev); 518 buf[3] = have_tp ? 0x3c : 0x10; 519 520 /* Set WSNZ to 1 */ 521 buf[4] = 0x01; 522 523 /* 524 * Set OPTIMAL TRANSFER LENGTH GRANULARITY 525 */ 526 put_unaligned_be16(1, &buf[6]); 527 528 /* 529 * Set MAXIMUM TRANSFER LENGTH 530 */ 531 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_sectors, &buf[8]); 532 533 /* 534 * Set OPTIMAL TRANSFER LENGTH 535 */ 536 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.optimal_sectors, &buf[12]); 537 538 /* 539 * Exit now if we don't support TP or the initiator sent a too 540 * short buffer. 541 */ 542 if (!have_tp || cmd->data_length < (0x3c + 4)) 543 return 0; 544 545 /* 546 * Set MAXIMUM UNMAP LBA COUNT 547 */ 548 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count, &buf[20]); 549 550 /* 551 * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT 552 */ 553 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count, 554 &buf[24]); 555 556 /* 557 * Set OPTIMAL UNMAP GRANULARITY 558 */ 559 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity, &buf[28]); 560 561 /* 562 * UNMAP GRANULARITY ALIGNMENT 563 */ 564 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment, 565 &buf[32]); 566 if (dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment != 0) 567 buf[32] |= 0x80; /* Set the UGAVALID bit */ 568 569 return 0; 570} 571 572/* Block Device Characteristics VPD page */ 573static int 574target_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) 575{ 576 struct se_device *dev = cmd->se_dev; 577 578 buf[0] = dev->transport->get_device_type(dev); 579 buf[3] = 0x3c; 580 581 if (cmd->data_length >= 5 && 582 dev->se_sub_dev->se_dev_attrib.is_nonrot) 583 buf[5] = 1; 584 585 return 0; 586} 587 588/* Thin Provisioning VPD */ 589static int 590target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) 591{ 592 struct se_device *dev = cmd->se_dev; 593 594 /* 595 * From sbc3r22 section 6.5.4 Thin Provisioning VPD page: 596 * 597 * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to 598 * zero, then the page length shall be set to 0004h. If the DP bit 599 * is set to one, then the page length shall be set to the value 600 * defined in table 162. 601 */ 602 buf[0] = dev->transport->get_device_type(dev); 603 604 /* 605 * Set Hardcoded length mentioned above for DP=0 606 */ 607 put_unaligned_be16(0x0004, &buf[2]); 608 609 /* 610 * The THRESHOLD EXPONENT field indicates the threshold set size in 611 * LBAs as a power of 2 (i.e., the threshold set size is equal to 612 * 2(threshold exponent)). 613 * 614 * Note that this is currently set to 0x00 as mkp says it will be 615 * changing again. We can enable this once it has settled in T10 616 * and is actually used by Linux/SCSI ML code. 617 */ 618 buf[4] = 0x00; 619 620 /* 621 * A TPU bit set to one indicates that the device server supports 622 * the UNMAP command (see 5.25). A TPU bit set to zero indicates 623 * that the device server does not support the UNMAP command. 624 */ 625 if (dev->se_sub_dev->se_dev_attrib.emulate_tpu != 0) 626 buf[5] = 0x80; 627 628 /* 629 * A TPWS bit set to one indicates that the device server supports 630 * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. 631 * A TPWS bit set to zero indicates that the device server does not 632 * support the use of the WRITE SAME (16) command to unmap LBAs. 633 */ 634 if (dev->se_sub_dev->se_dev_attrib.emulate_tpws != 0) 635 buf[5] |= 0x40; 636 637 return 0; 638} 639 640static int 641target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); 642 643static struct { 644 uint8_t page; 645 int (*emulate)(struct se_cmd *, unsigned char *); 646} evpd_handlers[] = { 647 { .page = 0x00, .emulate = target_emulate_evpd_00 }, 648 { .page = 0x80, .emulate = target_emulate_evpd_80 }, 649 { .page = 0x83, .emulate = target_emulate_evpd_83 }, 650 { .page = 0x86, .emulate = target_emulate_evpd_86 }, 651 { .page = 0xb0, .emulate = target_emulate_evpd_b0 }, 652 { .page = 0xb1, .emulate = target_emulate_evpd_b1 }, 653 { .page = 0xb2, .emulate = target_emulate_evpd_b2 }, 654}; 655 656/* supported vital product data pages */ 657static int 658target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) 659{ 660 int p; 661 662 if (cmd->data_length < 8) 663 return 0; 664 /* 665 * Only report the INQUIRY EVPD=1 pages after a valid NAA 666 * Registered Extended LUN WWN has been set via ConfigFS 667 * during device creation/restart. 668 */ 669 if (cmd->se_dev->se_sub_dev->su_dev_flags & 670 SDF_EMULATED_VPD_UNIT_SERIAL) { 671 buf[3] = ARRAY_SIZE(evpd_handlers); 672 for (p = 0; p < min_t(int, ARRAY_SIZE(evpd_handlers), 673 cmd->data_length - 4); ++p) 674 buf[p + 4] = evpd_handlers[p].page; 675 } 676 677 return 0; 678} 679 680int target_emulate_inquiry(struct se_task *task) 681{ 682 struct se_cmd *cmd = task->task_se_cmd; 683 struct se_device *dev = cmd->se_dev; 684 unsigned char *buf; 685 unsigned char *cdb = cmd->t_task_cdb; 686 int p, ret; 687 688 if (!(cdb[1] & 0x1)) { 689 ret = target_emulate_inquiry_std(cmd); 690 goto out; 691 } 692 693 /* 694 * Make sure we at least have 4 bytes of INQUIRY response 695 * payload for 0x00 going back for EVPD=1. Note that 0x80 696 * and 0x83 will check for enough payload data length and 697 * jump to set_len: label when there is not enough inquiry EVPD 698 * payload length left for the next outgoing EVPD metadata 699 */ 700 if (cmd->data_length < 4) { 701 pr_err("SCSI Inquiry payload length: %u" 702 " too small for EVPD=1\n", cmd->data_length); 703 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 704 return -EINVAL; 705 } 706 707 buf = transport_kmap_first_data_page(cmd); 708 709 buf[0] = dev->transport->get_device_type(dev); 710 711 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) { 712 if (cdb[2] == evpd_handlers[p].page) { 713 buf[1] = cdb[2]; 714 ret = evpd_handlers[p].emulate(cmd, buf); 715 goto out_unmap; 716 } 717 } 718 719 pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); 720 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; 721 ret = -EINVAL; 722 723out_unmap: 724 transport_kunmap_first_data_page(cmd); 725out: 726 if (!ret) { 727 task->task_scsi_status = GOOD; 728 transport_complete_task(task, 1); 729 } 730 return ret; 731} 732 733int target_emulate_readcapacity(struct se_task *task) 734{ 735 struct se_cmd *cmd = task->task_se_cmd; 736 struct se_device *dev = cmd->se_dev; 737 unsigned char *buf; 738 unsigned long long blocks_long = dev->transport->get_blocks(dev); 739 u32 blocks; 740 741 if (blocks_long >= 0x00000000ffffffff) 742 blocks = 0xffffffff; 743 else 744 blocks = (u32)blocks_long; 745 746 buf = transport_kmap_first_data_page(cmd); 747 748 buf[0] = (blocks >> 24) & 0xff; 749 buf[1] = (blocks >> 16) & 0xff; 750 buf[2] = (blocks >> 8) & 0xff; 751 buf[3] = blocks & 0xff; 752 buf[4] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; 753 buf[5] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; 754 buf[6] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; 755 buf[7] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; 756 /* 757 * Set max 32-bit blocks to signal SERVICE ACTION READ_CAPACITY_16 758 */ 759 if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) 760 put_unaligned_be32(0xFFFFFFFF, &buf[0]); 761 762 transport_kunmap_first_data_page(cmd); 763 764 task->task_scsi_status = GOOD; 765 transport_complete_task(task, 1); 766 return 0; 767} 768 769int target_emulate_readcapacity_16(struct se_task *task) 770{ 771 struct se_cmd *cmd = task->task_se_cmd; 772 struct se_device *dev = cmd->se_dev; 773 unsigned char *buf; 774 unsigned long long blocks = dev->transport->get_blocks(dev); 775 776 buf = transport_kmap_first_data_page(cmd); 777 778 buf[0] = (blocks >> 56) & 0xff; 779 buf[1] = (blocks >> 48) & 0xff; 780 buf[2] = (blocks >> 40) & 0xff; 781 buf[3] = (blocks >> 32) & 0xff; 782 buf[4] = (blocks >> 24) & 0xff; 783 buf[5] = (blocks >> 16) & 0xff; 784 buf[6] = (blocks >> 8) & 0xff; 785 buf[7] = blocks & 0xff; 786 buf[8] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; 787 buf[9] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; 788 buf[10] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; 789 buf[11] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; 790 /* 791 * Set Thin Provisioning Enable bit following sbc3r22 in section 792 * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled. 793 */ 794 if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) 795 buf[14] = 0x80; 796 797 transport_kunmap_first_data_page(cmd); 798 799 task->task_scsi_status = GOOD; 800 transport_complete_task(task, 1); 801 return 0; 802} 803 804static int 805target_modesense_rwrecovery(unsigned char *p) 806{ 807 p[0] = 0x01; 808 p[1] = 0x0a; 809 810 return 12; 811} 812 813static int 814target_modesense_control(struct se_device *dev, unsigned char *p) 815{ 816 p[0] = 0x0a; 817 p[1] = 0x0a; 818 p[2] = 2; 819 /* 820 * From spc4r23, 7.4.7 Control mode page 821 * 822 * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies 823 * restrictions on the algorithm used for reordering commands 824 * having the SIMPLE task attribute (see SAM-4). 825 * 826 * Table 368 -- QUEUE ALGORITHM MODIFIER field 827 * Code Description 828 * 0h Restricted reordering 829 * 1h Unrestricted reordering allowed 830 * 2h to 7h Reserved 831 * 8h to Fh Vendor specific 832 * 833 * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that 834 * the device server shall order the processing sequence of commands 835 * having the SIMPLE task attribute such that data integrity is maintained 836 * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol 837 * requests is halted at any time, the final value of all data observable 838 * on the medium shall be the same as if all the commands had been processed 839 * with the ORDERED task attribute). 840 * 841 * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the 842 * device server may reorder the processing sequence of commands having the 843 * SIMPLE task attribute in any manner. Any data integrity exposures related to 844 * command sequence order shall be explicitly handled by the application client 845 * through the selection of appropriate ommands and task attributes. 846 */ 847 p[3] = (dev->se_sub_dev->se_dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; 848 /* 849 * From spc4r17, section 7.4.6 Control mode Page 850 * 851 * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b 852 * 853 * 00b: The logical unit shall clear any unit attention condition 854 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION 855 * status and shall not establish a unit attention condition when a com- 856 * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT 857 * status. 858 * 859 * 10b: The logical unit shall not 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 862 * a command is completed with BUSY, TASK SET FULL, or RESERVATION 863 * CONFLICT status. 864 * 865 * 11b a 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 establish a unit attention condition for the 868 * initiator port associated with the I_T nexus on which the BUSY, 869 * TASK SET FULL, or RESERVATION CONFLICT status is being returned. 870 * Depending on the status, the additional sense code shall be set to 871 * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS 872 * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE 873 * command, a unit attention condition shall be established only once 874 * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless 875 * to the number of commands completed with one of those status codes. 876 */ 877 p[4] = (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : 878 (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; 879 /* 880 * From spc4r17, section 7.4.6 Control mode Page 881 * 882 * Task Aborted Status (TAS) bit set to zero. 883 * 884 * A task aborted status (TAS) bit set to zero specifies that aborted 885 * tasks shall be terminated by the device server without any response 886 * to the application client. A TAS bit set to one specifies that tasks 887 * aborted by the actions of an I_T nexus other than the I_T nexus on 888 * which the command was received shall be completed with TASK ABORTED 889 * status (see SAM-4). 890 */ 891 p[5] = (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? 0x40 : 0x00; 892 p[8] = 0xff; 893 p[9] = 0xff; 894 p[11] = 30; 895 896 return 12; 897} 898 899static int 900target_modesense_caching(struct se_device *dev, unsigned char *p) 901{ 902 p[0] = 0x08; 903 p[1] = 0x12; 904 if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) 905 p[2] = 0x04; /* Write Cache Enable */ 906 p[12] = 0x20; /* Disabled Read Ahead */ 907 908 return 20; 909} 910 911static void 912target_modesense_write_protect(unsigned char *buf, int type) 913{ 914 /* 915 * I believe that the WP bit (bit 7) in the mode header is the same for 916 * all device types.. 917 */ 918 switch (type) { 919 case TYPE_DISK: 920 case TYPE_TAPE: 921 default: 922 buf[0] |= 0x80; /* WP bit */ 923 break; 924 } 925} 926 927static void 928target_modesense_dpofua(unsigned char *buf, int type) 929{ 930 switch (type) { 931 case TYPE_DISK: 932 buf[0] |= 0x10; /* DPOFUA bit */ 933 break; 934 default: 935 break; 936 } 937} 938 939int target_emulate_modesense(struct se_task *task) 940{ 941 struct se_cmd *cmd = task->task_se_cmd; 942 struct se_device *dev = cmd->se_dev; 943 char *cdb = cmd->t_task_cdb; 944 unsigned char *rbuf; 945 int type = dev->transport->get_device_type(dev); 946 int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10); 947 int offset = ten ? 8 : 4; 948 int length = 0; 949 unsigned char buf[SE_MODE_PAGE_BUF]; 950 951 memset(buf, 0, SE_MODE_PAGE_BUF); 952 953 switch (cdb[2] & 0x3f) { 954 case 0x01: 955 length = target_modesense_rwrecovery(&buf[offset]); 956 break; 957 case 0x08: 958 length = target_modesense_caching(dev, &buf[offset]); 959 break; 960 case 0x0a: 961 length = target_modesense_control(dev, &buf[offset]); 962 break; 963 case 0x3f: 964 length = target_modesense_rwrecovery(&buf[offset]); 965 length += target_modesense_caching(dev, &buf[offset+length]); 966 length += target_modesense_control(dev, &buf[offset+length]); 967 break; 968 default: 969 pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", 970 cdb[2] & 0x3f, cdb[3]); 971 cmd->scsi_sense_reason = TCM_UNKNOWN_MODE_PAGE; 972 return -EINVAL; 973 } 974 offset += length; 975 976 if (ten) { 977 offset -= 2; 978 buf[0] = (offset >> 8) & 0xff; 979 buf[1] = offset & 0xff; 980 981 if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || 982 (cmd->se_deve && 983 (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) 984 target_modesense_write_protect(&buf[3], type); 985 986 if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && 987 (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) 988 target_modesense_dpofua(&buf[3], type); 989 990 if ((offset + 2) > cmd->data_length) 991 offset = cmd->data_length; 992 993 } else { 994 offset -= 1; 995 buf[0] = offset & 0xff; 996 997 if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || 998 (cmd->se_deve && 999 (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) 1000 target_modesense_write_protect(&buf[2], type); 1001 1002 if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && 1003 (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) 1004 target_modesense_dpofua(&buf[2], type); 1005 1006 if ((offset + 1) > cmd->data_length) 1007 offset = cmd->data_length; 1008 } 1009 1010 rbuf = transport_kmap_first_data_page(cmd); 1011 memcpy(rbuf, buf, offset); 1012 transport_kunmap_first_data_page(cmd); 1013 1014 task->task_scsi_status = GOOD; 1015 transport_complete_task(task, 1); 1016 return 0; 1017} 1018 1019int target_emulate_request_sense(struct se_task *task) 1020{ 1021 struct se_cmd *cmd = task->task_se_cmd; 1022 unsigned char *cdb = cmd->t_task_cdb; 1023 unsigned char *buf; 1024 u8 ua_asc = 0, ua_ascq = 0; 1025 int err = 0; 1026 1027 if (cdb[1] & 0x01) { 1028 pr_err("REQUEST_SENSE description emulation not" 1029 " supported\n"); 1030 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 1031 return -ENOSYS; 1032 } 1033 1034 buf = transport_kmap_first_data_page(cmd); 1035 1036 if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) { 1037 /* 1038 * CURRENT ERROR, UNIT ATTENTION 1039 */ 1040 buf[0] = 0x70; 1041 buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; 1042 /* 1043 * Make sure request data length is enough for additional 1044 * sense data. 1045 */ 1046 if (cmd->data_length <= 18) { 1047 buf[7] = 0x00; 1048 err = -EINVAL; 1049 goto end; 1050 } 1051 /* 1052 * The Additional Sense Code (ASC) from the UNIT ATTENTION 1053 */ 1054 buf[SPC_ASC_KEY_OFFSET] = ua_asc; 1055 buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; 1056 buf[7] = 0x0A; 1057 } else { 1058 /* 1059 * CURRENT ERROR, NO SENSE 1060 */ 1061 buf[0] = 0x70; 1062 buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; 1063 /* 1064 * Make sure request data length is enough for additional 1065 * sense data. 1066 */ 1067 if (cmd->data_length <= 18) { 1068 buf[7] = 0x00; 1069 err = -EINVAL; 1070 goto end; 1071 } 1072 /* 1073 * NO ADDITIONAL SENSE INFORMATION 1074 */ 1075 buf[SPC_ASC_KEY_OFFSET] = 0x00; 1076 buf[7] = 0x0A; 1077 } 1078 1079end: 1080 transport_kunmap_first_data_page(cmd); 1081 task->task_scsi_status = GOOD; 1082 transport_complete_task(task, 1); 1083 return 0; 1084} 1085 1086/* 1087 * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. 1088 * Note this is not used for TCM/pSCSI passthrough 1089 */ 1090int target_emulate_unmap(struct se_task *task) 1091{ 1092 struct se_cmd *cmd = task->task_se_cmd; 1093 struct se_device *dev = cmd->se_dev; 1094 unsigned char *buf, *ptr = NULL; 1095 unsigned char *cdb = &cmd->t_task_cdb[0]; 1096 sector_t lba; 1097 unsigned int size = cmd->data_length, range; 1098 int ret = 0, offset; 1099 unsigned short dl, bd_dl; 1100 1101 if (!dev->transport->do_discard) { 1102 pr_err("UNMAP emulation not supported for: %s\n", 1103 dev->transport->name); 1104 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; 1105 return -ENOSYS; 1106 } 1107 1108 /* First UNMAP block descriptor starts at 8 byte offset */ 1109 offset = 8; 1110 size -= 8; 1111 dl = get_unaligned_be16(&cdb[0]); 1112 bd_dl = get_unaligned_be16(&cdb[2]); 1113 1114 buf = transport_kmap_first_data_page(cmd); 1115 1116 ptr = &buf[offset]; 1117 pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu" 1118 " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); 1119 1120 while (size) { 1121 lba = get_unaligned_be64(&ptr[0]); 1122 range = get_unaligned_be32(&ptr[8]); 1123 pr_debug("UNMAP: Using lba: %llu and range: %u\n", 1124 (unsigned long long)lba, range); 1125 1126 ret = dev->transport->do_discard(dev, lba, range); 1127 if (ret < 0) { 1128 pr_err("blkdev_issue_discard() failed: %d\n", 1129 ret); 1130 goto err; 1131 } 1132 1133 ptr += 16; 1134 size -= 16; 1135 } 1136 1137err: 1138 transport_kunmap_first_data_page(cmd); 1139 if (!ret) { 1140 task->task_scsi_status = GOOD; 1141 transport_complete_task(task, 1); 1142 } 1143 return ret; 1144} 1145 1146/* 1147 * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. 1148 * Note this is not used for TCM/pSCSI passthrough 1149 */ 1150int target_emulate_write_same(struct se_task *task) 1151{ 1152 struct se_cmd *cmd = task->task_se_cmd; 1153 struct se_device *dev = cmd->se_dev; 1154 sector_t range; 1155 sector_t lba = cmd->t_task_lba; 1156 u32 num_blocks; 1157 int ret; 1158 1159 if (!dev->transport->do_discard) { 1160 pr_err("WRITE_SAME emulation not supported" 1161 " for: %s\n", dev->transport->name); 1162 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; 1163 return -ENOSYS; 1164 } 1165 1166 if (cmd->t_task_cdb[0] == WRITE_SAME) 1167 num_blocks = get_unaligned_be16(&cmd->t_task_cdb[7]); 1168 else if (cmd->t_task_cdb[0] == WRITE_SAME_16) 1169 num_blocks = get_unaligned_be32(&cmd->t_task_cdb[10]); 1170 else /* WRITE_SAME_32 via VARIABLE_LENGTH_CMD */ 1171 num_blocks = get_unaligned_be32(&cmd->t_task_cdb[28]); 1172 1173 /* 1174 * Use the explicit range when non zero is supplied, otherwise calculate 1175 * the remaining range based on ->get_blocks() - starting LBA. 1176 */ 1177 if (num_blocks != 0) 1178 range = num_blocks; 1179 else 1180 range = (dev->transport->get_blocks(dev) - lba); 1181 1182 pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n", 1183 (unsigned long long)lba, (unsigned long long)range); 1184 1185 ret = dev->transport->do_discard(dev, lba, range); 1186 if (ret < 0) { 1187 pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n"); 1188 return ret; 1189 } 1190 1191 task->task_scsi_status = GOOD; 1192 transport_complete_task(task, 1); 1193 return 0; 1194} 1195 1196int target_emulate_synchronize_cache(struct se_task *task) 1197{ 1198 struct se_device *dev = task->task_se_cmd->se_dev; 1199 struct se_cmd *cmd = task->task_se_cmd; 1200 1201 if (!dev->transport->do_sync_cache) { 1202 pr_err("SYNCHRONIZE_CACHE emulation not supported" 1203 " for: %s\n", dev->transport->name); 1204 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; 1205 return -ENOSYS; 1206 } 1207 1208 dev->transport->do_sync_cache(task); 1209 return 0; 1210} 1211 1212int target_emulate_noop(struct se_task *task) 1213{ 1214 task->task_scsi_status = GOOD; 1215 transport_complete_task(task, 1); 1216 return 0; 1217} 1218 1219/* 1220 * Write a CDB into @cdb that is based on the one the intiator sent us, 1221 * but updated to only cover the sectors that the current task handles. 1222 */ 1223void target_get_task_cdb(struct se_task *task, unsigned char *cdb) 1224{ 1225 struct se_cmd *cmd = task->task_se_cmd; 1226 unsigned int cdb_len = scsi_command_size(cmd->t_task_cdb); 1227 1228 memcpy(cdb, cmd->t_task_cdb, cdb_len); 1229 if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) { 1230 unsigned long long lba = task->task_lba; 1231 u32 sectors = task->task_sectors; 1232 1233 switch (cdb_len) { 1234 case 6: 1235 /* 21-bit LBA and 8-bit sectors */ 1236 cdb[1] = (lba >> 16) & 0x1f; 1237 cdb[2] = (lba >> 8) & 0xff; 1238 cdb[3] = lba & 0xff; 1239 cdb[4] = sectors & 0xff; 1240 break; 1241 case 10: 1242 /* 32-bit LBA and 16-bit sectors */ 1243 put_unaligned_be32(lba, &cdb[2]); 1244 put_unaligned_be16(sectors, &cdb[7]); 1245 break; 1246 case 12: 1247 /* 32-bit LBA and 32-bit sectors */ 1248 put_unaligned_be32(lba, &cdb[2]); 1249 put_unaligned_be32(sectors, &cdb[6]); 1250 break; 1251 case 16: 1252 /* 64-bit LBA and 32-bit sectors */ 1253 put_unaligned_be64(lba, &cdb[2]); 1254 put_unaligned_be32(sectors, &cdb[10]); 1255 break; 1256 case 32: 1257 /* 64-bit LBA and 32-bit sectors, extended CDB */ 1258 put_unaligned_be64(lba, &cdb[12]); 1259 put_unaligned_be32(sectors, &cdb[28]); 1260 break; 1261 default: 1262 BUG(); 1263 } 1264 } 1265} 1266EXPORT_SYMBOL(target_get_task_cdb); 1267