target_core_cdb.c revision 03e98c9eb916f3f0868c1dc344dde2a60287ff72
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_transport.h> 33#include <target/target_core_fabric_ops.h> 34#include "target_core_ua.h" 35#include "target_core_cdb.h" 36 37static void 38target_fill_alua_data(struct se_port *port, unsigned char *buf) 39{ 40 struct t10_alua_tg_pt_gp *tg_pt_gp; 41 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; 42 43 /* 44 * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS. 45 */ 46 buf[5] = 0x80; 47 48 /* 49 * Set TPGS field for explict and/or implict ALUA access type 50 * and opteration. 51 * 52 * See spc4r17 section 6.4.2 Table 135 53 */ 54 if (!port) 55 return; 56 tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; 57 if (!tg_pt_gp_mem) 58 return; 59 60 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 61 tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; 62 if (tg_pt_gp) 63 buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; 64 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 65} 66 67static int 68target_emulate_inquiry_std(struct se_cmd *cmd) 69{ 70 struct se_lun *lun = cmd->se_lun; 71 struct se_device *dev = cmd->se_dev; 72 struct se_portal_group *tpg = lun->lun_sep->sep_tpg; 73 unsigned char *buf; 74 75 /* 76 * Make sure we at least have 6 bytes of INQUIRY response 77 * payload going back for EVPD=0 78 */ 79 if (cmd->data_length < 6) { 80 pr_err("SCSI Inquiry payload length: %u" 81 " too small for EVPD=0\n", cmd->data_length); 82 return -EINVAL; 83 } 84 85 buf = transport_kmap_first_data_page(cmd); 86 87 if (dev == tpg->tpg_virt_lun0.lun_se_dev) { 88 buf[0] = 0x3f; /* Not connected */ 89 } else { 90 buf[0] = dev->transport->get_device_type(dev); 91 if (buf[0] == TYPE_TAPE) 92 buf[1] = 0x80; 93 } 94 buf[2] = dev->transport->get_device_rev(dev); 95 96 /* 97 * Enable SCCS and TPGS fields for Emulated ALUA 98 */ 99 if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) 100 target_fill_alua_data(lun->lun_sep, buf); 101 102 if (cmd->data_length < 8) { 103 buf[4] = 1; /* Set additional length to 1 */ 104 goto out; 105 } 106 107 buf[7] = 0x32; /* Sync=1 and CmdQue=1 */ 108 109 /* 110 * Do not include vendor, product, reversion info in INQUIRY 111 * response payload for cdbs with a small allocation length. 112 */ 113 if (cmd->data_length < 36) { 114 buf[4] = 3; /* Set additional length to 3 */ 115 goto out; 116 } 117 118 snprintf((unsigned char *)&buf[8], 8, "LIO-ORG"); 119 snprintf((unsigned char *)&buf[16], 16, "%s", 120 &dev->se_sub_dev->t10_wwn.model[0]); 121 snprintf((unsigned char *)&buf[32], 4, "%s", 122 &dev->se_sub_dev->t10_wwn.revision[0]); 123 buf[4] = 31; /* Set additional length to 31 */ 124 125out: 126 transport_kunmap_first_data_page(cmd); 127 return 0; 128} 129 130/* unit serial number */ 131static int 132target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) 133{ 134 struct se_device *dev = cmd->se_dev; 135 u16 len = 0; 136 137 if (dev->se_sub_dev->su_dev_flags & 138 SDF_EMULATED_VPD_UNIT_SERIAL) { 139 u32 unit_serial_len; 140 141 unit_serial_len = 142 strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]); 143 unit_serial_len++; /* For NULL Terminator */ 144 145 if (((len + 4) + unit_serial_len) > cmd->data_length) { 146 len += unit_serial_len; 147 buf[2] = ((len >> 8) & 0xff); 148 buf[3] = (len & 0xff); 149 return 0; 150 } 151 len += sprintf((unsigned char *)&buf[4], "%s", 152 &dev->se_sub_dev->t10_wwn.unit_serial[0]); 153 len++; /* Extra Byte for NULL Terminator */ 154 buf[3] = len; 155 } 156 return 0; 157} 158 159static void 160target_parse_naa_6h_vendor_specific(struct se_device *dev, unsigned char *buf) 161{ 162 unsigned char *p = &dev->se_sub_dev->t10_wwn.unit_serial[0]; 163 int cnt; 164 bool next = true; 165 166 /* 167 * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on 168 * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field 169 * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION 170 * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL 171 * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure 172 * per device uniqeness. 173 */ 174 for (cnt = 0; *p && cnt < 13; p++) { 175 int val = hex_to_bin(*p); 176 177 if (val < 0) 178 continue; 179 180 if (next) { 181 next = false; 182 buf[cnt++] |= val; 183 } else { 184 next = true; 185 buf[cnt] = val << 4; 186 } 187 } 188} 189 190/* 191 * Device identification VPD, for a complete list of 192 * DESIGNATOR TYPEs see spc4r17 Table 459. 193 */ 194static int 195target_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) 196{ 197 struct se_device *dev = cmd->se_dev; 198 struct se_lun *lun = cmd->se_lun; 199 struct se_port *port = NULL; 200 struct se_portal_group *tpg = NULL; 201 struct t10_alua_lu_gp_member *lu_gp_mem; 202 struct t10_alua_tg_pt_gp *tg_pt_gp; 203 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; 204 unsigned char *prod = &dev->se_sub_dev->t10_wwn.model[0]; 205 u32 prod_len; 206 u32 unit_serial_len, off = 0; 207 u16 len = 0, id_len; 208 209 off = 4; 210 211 /* 212 * NAA IEEE Registered Extended Assigned designator format, see 213 * spc4r17 section 7.7.3.6.5 214 * 215 * We depend upon a target_core_mod/ConfigFS provided 216 * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial 217 * value in order to return the NAA id. 218 */ 219 if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL)) 220 goto check_t10_vend_desc; 221 222 if (off + 20 > cmd->data_length) 223 goto check_t10_vend_desc; 224 225 /* CODE SET == Binary */ 226 buf[off++] = 0x1; 227 228 /* Set ASSOCIATION == addressed logical unit: 0)b */ 229 buf[off] = 0x00; 230 231 /* Identifier/Designator type == NAA identifier */ 232 buf[off++] |= 0x3; 233 off++; 234 235 /* Identifier/Designator length */ 236 buf[off++] = 0x10; 237 238 /* 239 * Start NAA IEEE Registered Extended Identifier/Designator 240 */ 241 buf[off++] = (0x6 << 4); 242 243 /* 244 * Use OpenFabrics IEEE Company ID: 00 14 05 245 */ 246 buf[off++] = 0x01; 247 buf[off++] = 0x40; 248 buf[off] = (0x5 << 4); 249 250 /* 251 * Return ConfigFS Unit Serial Number information for 252 * VENDOR_SPECIFIC_IDENTIFIER and 253 * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION 254 */ 255 target_parse_naa_6h_vendor_specific(dev, &buf[off]); 256 257 len = 20; 258 off = (len + 4); 259 260check_t10_vend_desc: 261 /* 262 * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 263 */ 264 id_len = 8; /* For Vendor field */ 265 prod_len = 4; /* For VPD Header */ 266 prod_len += 8; /* For Vendor field */ 267 prod_len += strlen(prod); 268 prod_len++; /* For : */ 269 270 if (dev->se_sub_dev->su_dev_flags & 271 SDF_EMULATED_VPD_UNIT_SERIAL) { 272 unit_serial_len = 273 strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]); 274 unit_serial_len++; /* For NULL Terminator */ 275 276 if ((len + (id_len + 4) + 277 (prod_len + unit_serial_len)) > 278 cmd->data_length) { 279 len += (prod_len + unit_serial_len); 280 goto check_port; 281 } 282 id_len += sprintf((unsigned char *)&buf[off+12], 283 "%s:%s", prod, 284 &dev->se_sub_dev->t10_wwn.unit_serial[0]); 285 } 286 buf[off] = 0x2; /* ASCII */ 287 buf[off+1] = 0x1; /* T10 Vendor ID */ 288 buf[off+2] = 0x0; 289 memcpy((unsigned char *)&buf[off+4], "LIO-ORG", 8); 290 /* Extra Byte for NULL Terminator */ 291 id_len++; 292 /* Identifier Length */ 293 buf[off+3] = id_len; 294 /* Header size for Designation descriptor */ 295 len += (id_len + 4); 296 off += (id_len + 4); 297 /* 298 * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD 299 */ 300check_port: 301 port = lun->lun_sep; 302 if (port) { 303 struct t10_alua_lu_gp *lu_gp; 304 u32 padding, scsi_name_len; 305 u16 lu_gp_id = 0; 306 u16 tg_pt_gp_id = 0; 307 u16 tpgt; 308 309 tpg = port->sep_tpg; 310 /* 311 * Relative target port identifer, see spc4r17 312 * section 7.7.3.7 313 * 314 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 315 * section 7.5.1 Table 362 316 */ 317 if (((len + 4) + 8) > cmd->data_length) { 318 len += 8; 319 goto check_tpgi; 320 } 321 buf[off] = 322 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); 323 buf[off++] |= 0x1; /* CODE SET == Binary */ 324 buf[off] = 0x80; /* Set PIV=1 */ 325 /* Set ASSOCIATION == target port: 01b */ 326 buf[off] |= 0x10; 327 /* DESIGNATOR TYPE == Relative target port identifer */ 328 buf[off++] |= 0x4; 329 off++; /* Skip over Reserved */ 330 buf[off++] = 4; /* DESIGNATOR LENGTH */ 331 /* Skip over Obsolete field in RTPI payload 332 * in Table 472 */ 333 off += 2; 334 buf[off++] = ((port->sep_rtpi >> 8) & 0xff); 335 buf[off++] = (port->sep_rtpi & 0xff); 336 len += 8; /* Header size + Designation descriptor */ 337 /* 338 * Target port group identifier, see spc4r17 339 * section 7.7.3.8 340 * 341 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 342 * section 7.5.1 Table 362 343 */ 344check_tpgi: 345 if (dev->se_sub_dev->t10_alua.alua_type != 346 SPC3_ALUA_EMULATED) 347 goto check_scsi_name; 348 349 if (((len + 4) + 8) > cmd->data_length) { 350 len += 8; 351 goto check_lu_gp; 352 } 353 tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; 354 if (!tg_pt_gp_mem) 355 goto check_lu_gp; 356 357 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 358 tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; 359 if (!tg_pt_gp) { 360 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 361 goto check_lu_gp; 362 } 363 tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; 364 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 365 366 buf[off] = 367 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); 368 buf[off++] |= 0x1; /* CODE SET == Binary */ 369 buf[off] = 0x80; /* Set PIV=1 */ 370 /* Set ASSOCIATION == target port: 01b */ 371 buf[off] |= 0x10; 372 /* DESIGNATOR TYPE == Target port group identifier */ 373 buf[off++] |= 0x5; 374 off++; /* Skip over Reserved */ 375 buf[off++] = 4; /* DESIGNATOR LENGTH */ 376 off += 2; /* Skip over Reserved Field */ 377 buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); 378 buf[off++] = (tg_pt_gp_id & 0xff); 379 len += 8; /* Header size + Designation descriptor */ 380 /* 381 * Logical Unit Group identifier, see spc4r17 382 * section 7.7.3.8 383 */ 384check_lu_gp: 385 if (((len + 4) + 8) > cmd->data_length) { 386 len += 8; 387 goto check_scsi_name; 388 } 389 lu_gp_mem = dev->dev_alua_lu_gp_mem; 390 if (!lu_gp_mem) 391 goto check_scsi_name; 392 393 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 394 lu_gp = lu_gp_mem->lu_gp; 395 if (!lu_gp) { 396 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 397 goto check_scsi_name; 398 } 399 lu_gp_id = lu_gp->lu_gp_id; 400 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 401 402 buf[off++] |= 0x1; /* CODE SET == Binary */ 403 /* DESIGNATOR TYPE == Logical Unit Group identifier */ 404 buf[off++] |= 0x6; 405 off++; /* Skip over Reserved */ 406 buf[off++] = 4; /* DESIGNATOR LENGTH */ 407 off += 2; /* Skip over Reserved Field */ 408 buf[off++] = ((lu_gp_id >> 8) & 0xff); 409 buf[off++] = (lu_gp_id & 0xff); 410 len += 8; /* Header size + Designation descriptor */ 411 /* 412 * SCSI name string designator, see spc4r17 413 * section 7.7.3.11 414 * 415 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 416 * section 7.5.1 Table 362 417 */ 418check_scsi_name: 419 scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg)); 420 /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */ 421 scsi_name_len += 10; 422 /* Check for 4-byte padding */ 423 padding = ((-scsi_name_len) & 3); 424 if (padding != 0) 425 scsi_name_len += padding; 426 /* Header size + Designation descriptor */ 427 scsi_name_len += 4; 428 429 if (((len + 4) + scsi_name_len) > cmd->data_length) { 430 len += scsi_name_len; 431 goto set_len; 432 } 433 buf[off] = 434 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); 435 buf[off++] |= 0x3; /* CODE SET == UTF-8 */ 436 buf[off] = 0x80; /* Set PIV=1 */ 437 /* Set ASSOCIATION == target port: 01b */ 438 buf[off] |= 0x10; 439 /* DESIGNATOR TYPE == SCSI name string */ 440 buf[off++] |= 0x8; 441 off += 2; /* Skip over Reserved and length */ 442 /* 443 * SCSI name string identifer containing, $FABRIC_MOD 444 * dependent information. For LIO-Target and iSCSI 445 * Target Port, this means "<iSCSI name>,t,0x<TPGT> in 446 * UTF-8 encoding. 447 */ 448 tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); 449 scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", 450 tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); 451 scsi_name_len += 1 /* Include NULL terminator */; 452 /* 453 * The null-terminated, null-padded (see 4.4.2) SCSI 454 * NAME STRING field contains a UTF-8 format string. 455 * The number of bytes in the SCSI NAME STRING field 456 * (i.e., the value in the DESIGNATOR LENGTH field) 457 * shall be no larger than 256 and shall be a multiple 458 * of four. 459 */ 460 if (padding) 461 scsi_name_len += padding; 462 463 buf[off-1] = scsi_name_len; 464 off += scsi_name_len; 465 /* Header size + Designation descriptor */ 466 len += (scsi_name_len + 4); 467 } 468set_len: 469 buf[2] = ((len >> 8) & 0xff); 470 buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ 471 return 0; 472} 473 474/* Extended INQUIRY Data VPD Page */ 475static int 476target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) 477{ 478 if (cmd->data_length < 60) 479 return 0; 480 481 buf[2] = 0x3c; 482 /* Set HEADSUP, ORDSUP, SIMPSUP */ 483 buf[5] = 0x07; 484 485 /* If WriteCache emulation is enabled, set V_SUP */ 486 if (cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) 487 buf[6] = 0x01; 488 return 0; 489} 490 491/* Block Limits VPD page */ 492static int 493target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) 494{ 495 struct se_device *dev = cmd->se_dev; 496 int have_tp = 0; 497 498 /* 499 * Following sbc3r22 section 6.5.3 Block Limits VPD page, when 500 * emulate_tpu=1 or emulate_tpws=1 we will be expect a 501 * different page length for Thin Provisioning. 502 */ 503 if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) 504 have_tp = 1; 505 506 if (cmd->data_length < (0x10 + 4)) { 507 pr_debug("Received data_length: %u" 508 " too small for EVPD 0xb0\n", 509 cmd->data_length); 510 return -EINVAL; 511 } 512 513 if (have_tp && cmd->data_length < (0x3c + 4)) { 514 pr_debug("Received data_length: %u" 515 " too small for TPE=1 EVPD 0xb0\n", 516 cmd->data_length); 517 have_tp = 0; 518 } 519 520 buf[0] = dev->transport->get_device_type(dev); 521 buf[3] = have_tp ? 0x3c : 0x10; 522 523 /* Set WSNZ to 1 */ 524 buf[4] = 0x01; 525 526 /* 527 * Set OPTIMAL TRANSFER LENGTH GRANULARITY 528 */ 529 put_unaligned_be16(1, &buf[6]); 530 531 /* 532 * Set MAXIMUM TRANSFER LENGTH 533 */ 534 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_sectors, &buf[8]); 535 536 /* 537 * Set OPTIMAL TRANSFER LENGTH 538 */ 539 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.optimal_sectors, &buf[12]); 540 541 /* 542 * Exit now if we don't support TP or the initiator sent a too 543 * short buffer. 544 */ 545 if (!have_tp || cmd->data_length < (0x3c + 4)) 546 return 0; 547 548 /* 549 * Set MAXIMUM UNMAP LBA COUNT 550 */ 551 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count, &buf[20]); 552 553 /* 554 * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT 555 */ 556 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count, 557 &buf[24]); 558 559 /* 560 * Set OPTIMAL UNMAP GRANULARITY 561 */ 562 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity, &buf[28]); 563 564 /* 565 * UNMAP GRANULARITY ALIGNMENT 566 */ 567 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment, 568 &buf[32]); 569 if (dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment != 0) 570 buf[32] |= 0x80; /* Set the UGAVALID bit */ 571 572 return 0; 573} 574 575/* Block Device Characteristics VPD page */ 576static int 577target_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) 578{ 579 struct se_device *dev = cmd->se_dev; 580 581 buf[0] = dev->transport->get_device_type(dev); 582 buf[3] = 0x3c; 583 584 if (cmd->data_length >= 5 && 585 dev->se_sub_dev->se_dev_attrib.is_nonrot) 586 buf[5] = 1; 587 588 return 0; 589} 590 591/* Thin Provisioning VPD */ 592static int 593target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) 594{ 595 struct se_device *dev = cmd->se_dev; 596 597 /* 598 * From sbc3r22 section 6.5.4 Thin Provisioning VPD page: 599 * 600 * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to 601 * zero, then the page length shall be set to 0004h. If the DP bit 602 * is set to one, then the page length shall be set to the value 603 * defined in table 162. 604 */ 605 buf[0] = dev->transport->get_device_type(dev); 606 607 /* 608 * Set Hardcoded length mentioned above for DP=0 609 */ 610 put_unaligned_be16(0x0004, &buf[2]); 611 612 /* 613 * The THRESHOLD EXPONENT field indicates the threshold set size in 614 * LBAs as a power of 2 (i.e., the threshold set size is equal to 615 * 2(threshold exponent)). 616 * 617 * Note that this is currently set to 0x00 as mkp says it will be 618 * changing again. We can enable this once it has settled in T10 619 * and is actually used by Linux/SCSI ML code. 620 */ 621 buf[4] = 0x00; 622 623 /* 624 * A TPU bit set to one indicates that the device server supports 625 * the UNMAP command (see 5.25). A TPU bit set to zero indicates 626 * that the device server does not support the UNMAP command. 627 */ 628 if (dev->se_sub_dev->se_dev_attrib.emulate_tpu != 0) 629 buf[5] = 0x80; 630 631 /* 632 * A TPWS bit set to one indicates that the device server supports 633 * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. 634 * A TPWS bit set to zero indicates that the device server does not 635 * support the use of the WRITE SAME (16) command to unmap LBAs. 636 */ 637 if (dev->se_sub_dev->se_dev_attrib.emulate_tpws != 0) 638 buf[5] |= 0x40; 639 640 return 0; 641} 642 643static int 644target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); 645 646static struct { 647 uint8_t page; 648 int (*emulate)(struct se_cmd *, unsigned char *); 649} evpd_handlers[] = { 650 { .page = 0x00, .emulate = target_emulate_evpd_00 }, 651 { .page = 0x80, .emulate = target_emulate_evpd_80 }, 652 { .page = 0x83, .emulate = target_emulate_evpd_83 }, 653 { .page = 0x86, .emulate = target_emulate_evpd_86 }, 654 { .page = 0xb0, .emulate = target_emulate_evpd_b0 }, 655 { .page = 0xb1, .emulate = target_emulate_evpd_b1 }, 656 { .page = 0xb2, .emulate = target_emulate_evpd_b2 }, 657}; 658 659/* supported vital product data pages */ 660static int 661target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) 662{ 663 int p; 664 665 if (cmd->data_length < 8) 666 return 0; 667 /* 668 * Only report the INQUIRY EVPD=1 pages after a valid NAA 669 * Registered Extended LUN WWN has been set via ConfigFS 670 * during device creation/restart. 671 */ 672 if (cmd->se_dev->se_sub_dev->su_dev_flags & 673 SDF_EMULATED_VPD_UNIT_SERIAL) { 674 buf[3] = ARRAY_SIZE(evpd_handlers); 675 for (p = 0; p < min_t(int, ARRAY_SIZE(evpd_handlers), 676 cmd->data_length - 4); ++p) 677 buf[p + 4] = evpd_handlers[p].page; 678 } 679 680 return 0; 681} 682 683int target_emulate_inquiry(struct se_task *task) 684{ 685 struct se_cmd *cmd = task->task_se_cmd; 686 struct se_device *dev = cmd->se_dev; 687 unsigned char *buf; 688 unsigned char *cdb = cmd->t_task_cdb; 689 int p, ret; 690 691 if (!(cdb[1] & 0x1)) { 692 ret = target_emulate_inquiry_std(cmd); 693 goto out; 694 } 695 696 /* 697 * Make sure we at least have 4 bytes of INQUIRY response 698 * payload for 0x00 going back for EVPD=1. Note that 0x80 699 * and 0x83 will check for enough payload data length and 700 * jump to set_len: label when there is not enough inquiry EVPD 701 * payload length left for the next outgoing EVPD metadata 702 */ 703 if (cmd->data_length < 4) { 704 pr_err("SCSI Inquiry payload length: %u" 705 " too small for EVPD=1\n", cmd->data_length); 706 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 707 return -EINVAL; 708 } 709 710 buf = transport_kmap_first_data_page(cmd); 711 712 buf[0] = dev->transport->get_device_type(dev); 713 714 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) { 715 if (cdb[2] == evpd_handlers[p].page) { 716 buf[1] = cdb[2]; 717 ret = evpd_handlers[p].emulate(cmd, buf); 718 goto out_unmap; 719 } 720 } 721 722 pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); 723 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; 724 ret = -EINVAL; 725 726out_unmap: 727 transport_kunmap_first_data_page(cmd); 728out: 729 if (!ret) { 730 task->task_scsi_status = GOOD; 731 transport_complete_task(task, 1); 732 } 733 return ret; 734} 735 736int target_emulate_readcapacity(struct se_task *task) 737{ 738 struct se_cmd *cmd = task->task_se_cmd; 739 struct se_device *dev = cmd->se_dev; 740 unsigned char *buf; 741 unsigned long long blocks_long = dev->transport->get_blocks(dev); 742 u32 blocks; 743 744 if (blocks_long >= 0x00000000ffffffff) 745 blocks = 0xffffffff; 746 else 747 blocks = (u32)blocks_long; 748 749 buf = transport_kmap_first_data_page(cmd); 750 751 buf[0] = (blocks >> 24) & 0xff; 752 buf[1] = (blocks >> 16) & 0xff; 753 buf[2] = (blocks >> 8) & 0xff; 754 buf[3] = blocks & 0xff; 755 buf[4] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; 756 buf[5] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; 757 buf[6] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; 758 buf[7] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; 759 /* 760 * Set max 32-bit blocks to signal SERVICE ACTION READ_CAPACITY_16 761 */ 762 if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) 763 put_unaligned_be32(0xFFFFFFFF, &buf[0]); 764 765 transport_kunmap_first_data_page(cmd); 766 767 task->task_scsi_status = GOOD; 768 transport_complete_task(task, 1); 769 return 0; 770} 771 772int target_emulate_readcapacity_16(struct se_task *task) 773{ 774 struct se_cmd *cmd = task->task_se_cmd; 775 struct se_device *dev = cmd->se_dev; 776 unsigned char *buf; 777 unsigned long long blocks = dev->transport->get_blocks(dev); 778 779 buf = transport_kmap_first_data_page(cmd); 780 781 buf[0] = (blocks >> 56) & 0xff; 782 buf[1] = (blocks >> 48) & 0xff; 783 buf[2] = (blocks >> 40) & 0xff; 784 buf[3] = (blocks >> 32) & 0xff; 785 buf[4] = (blocks >> 24) & 0xff; 786 buf[5] = (blocks >> 16) & 0xff; 787 buf[6] = (blocks >> 8) & 0xff; 788 buf[7] = blocks & 0xff; 789 buf[8] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; 790 buf[9] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; 791 buf[10] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; 792 buf[11] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; 793 /* 794 * Set Thin Provisioning Enable bit following sbc3r22 in section 795 * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled. 796 */ 797 if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) 798 buf[14] = 0x80; 799 800 transport_kunmap_first_data_page(cmd); 801 802 task->task_scsi_status = GOOD; 803 transport_complete_task(task, 1); 804 return 0; 805} 806 807static int 808target_modesense_rwrecovery(unsigned char *p) 809{ 810 p[0] = 0x01; 811 p[1] = 0x0a; 812 813 return 12; 814} 815 816static int 817target_modesense_control(struct se_device *dev, unsigned char *p) 818{ 819 p[0] = 0x0a; 820 p[1] = 0x0a; 821 p[2] = 2; 822 /* 823 * From spc4r23, 7.4.7 Control mode page 824 * 825 * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies 826 * restrictions on the algorithm used for reordering commands 827 * having the SIMPLE task attribute (see SAM-4). 828 * 829 * Table 368 -- QUEUE ALGORITHM MODIFIER field 830 * Code Description 831 * 0h Restricted reordering 832 * 1h Unrestricted reordering allowed 833 * 2h to 7h Reserved 834 * 8h to Fh Vendor specific 835 * 836 * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that 837 * the device server shall order the processing sequence of commands 838 * having the SIMPLE task attribute such that data integrity is maintained 839 * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol 840 * requests is halted at any time, the final value of all data observable 841 * on the medium shall be the same as if all the commands had been processed 842 * with the ORDERED task attribute). 843 * 844 * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the 845 * device server may reorder the processing sequence of commands having the 846 * SIMPLE task attribute in any manner. Any data integrity exposures related to 847 * command sequence order shall be explicitly handled by the application client 848 * through the selection of appropriate ommands and task attributes. 849 */ 850 p[3] = (dev->se_sub_dev->se_dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; 851 /* 852 * From spc4r17, section 7.4.6 Control mode Page 853 * 854 * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b 855 * 856 * 00b: The logical unit shall clear any unit attention condition 857 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION 858 * status and shall not establish a unit attention condition when a com- 859 * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT 860 * status. 861 * 862 * 10b: The logical unit shall not clear any unit attention condition 863 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION 864 * status and shall not establish a unit attention condition when 865 * a command is completed with BUSY, TASK SET FULL, or RESERVATION 866 * CONFLICT status. 867 * 868 * 11b a The logical unit shall not clear any unit attention condition 869 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION 870 * status and shall establish a unit attention condition for the 871 * initiator port associated with the I_T nexus on which the BUSY, 872 * TASK SET FULL, or RESERVATION CONFLICT status is being returned. 873 * Depending on the status, the additional sense code shall be set to 874 * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS 875 * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE 876 * command, a unit attention condition shall be established only once 877 * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless 878 * to the number of commands completed with one of those status codes. 879 */ 880 p[4] = (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : 881 (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; 882 /* 883 * From spc4r17, section 7.4.6 Control mode Page 884 * 885 * Task Aborted Status (TAS) bit set to zero. 886 * 887 * A task aborted status (TAS) bit set to zero specifies that aborted 888 * tasks shall be terminated by the device server without any response 889 * to the application client. A TAS bit set to one specifies that tasks 890 * aborted by the actions of an I_T nexus other than the I_T nexus on 891 * which the command was received shall be completed with TASK ABORTED 892 * status (see SAM-4). 893 */ 894 p[5] = (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? 0x40 : 0x00; 895 p[8] = 0xff; 896 p[9] = 0xff; 897 p[11] = 30; 898 899 return 12; 900} 901 902static int 903target_modesense_caching(struct se_device *dev, unsigned char *p) 904{ 905 p[0] = 0x08; 906 p[1] = 0x12; 907 if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) 908 p[2] = 0x04; /* Write Cache Enable */ 909 p[12] = 0x20; /* Disabled Read Ahead */ 910 911 return 20; 912} 913 914static void 915target_modesense_write_protect(unsigned char *buf, int type) 916{ 917 /* 918 * I believe that the WP bit (bit 7) in the mode header is the same for 919 * all device types.. 920 */ 921 switch (type) { 922 case TYPE_DISK: 923 case TYPE_TAPE: 924 default: 925 buf[0] |= 0x80; /* WP bit */ 926 break; 927 } 928} 929 930static void 931target_modesense_dpofua(unsigned char *buf, int type) 932{ 933 switch (type) { 934 case TYPE_DISK: 935 buf[0] |= 0x10; /* DPOFUA bit */ 936 break; 937 default: 938 break; 939 } 940} 941 942int target_emulate_modesense(struct se_task *task) 943{ 944 struct se_cmd *cmd = task->task_se_cmd; 945 struct se_device *dev = cmd->se_dev; 946 char *cdb = cmd->t_task_cdb; 947 unsigned char *rbuf; 948 int type = dev->transport->get_device_type(dev); 949 int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10); 950 int offset = ten ? 8 : 4; 951 int length = 0; 952 unsigned char buf[SE_MODE_PAGE_BUF]; 953 954 memset(buf, 0, SE_MODE_PAGE_BUF); 955 956 switch (cdb[2] & 0x3f) { 957 case 0x01: 958 length = target_modesense_rwrecovery(&buf[offset]); 959 break; 960 case 0x08: 961 length = target_modesense_caching(dev, &buf[offset]); 962 break; 963 case 0x0a: 964 length = target_modesense_control(dev, &buf[offset]); 965 break; 966 case 0x3f: 967 length = target_modesense_rwrecovery(&buf[offset]); 968 length += target_modesense_caching(dev, &buf[offset+length]); 969 length += target_modesense_control(dev, &buf[offset+length]); 970 break; 971 default: 972 pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", 973 cdb[2] & 0x3f, cdb[3]); 974 cmd->scsi_sense_reason = TCM_UNKNOWN_MODE_PAGE; 975 return -EINVAL; 976 } 977 offset += length; 978 979 if (ten) { 980 offset -= 2; 981 buf[0] = (offset >> 8) & 0xff; 982 buf[1] = offset & 0xff; 983 984 if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || 985 (cmd->se_deve && 986 (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) 987 target_modesense_write_protect(&buf[3], type); 988 989 if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && 990 (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) 991 target_modesense_dpofua(&buf[3], type); 992 993 if ((offset + 2) > cmd->data_length) 994 offset = cmd->data_length; 995 996 } else { 997 offset -= 1; 998 buf[0] = offset & 0xff; 999 1000 if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || 1001 (cmd->se_deve && 1002 (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) 1003 target_modesense_write_protect(&buf[2], type); 1004 1005 if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && 1006 (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) 1007 target_modesense_dpofua(&buf[2], type); 1008 1009 if ((offset + 1) > cmd->data_length) 1010 offset = cmd->data_length; 1011 } 1012 1013 rbuf = transport_kmap_first_data_page(cmd); 1014 memcpy(rbuf, buf, offset); 1015 transport_kunmap_first_data_page(cmd); 1016 1017 task->task_scsi_status = GOOD; 1018 transport_complete_task(task, 1); 1019 return 0; 1020} 1021 1022int target_emulate_request_sense(struct se_task *task) 1023{ 1024 struct se_cmd *cmd = task->task_se_cmd; 1025 unsigned char *cdb = cmd->t_task_cdb; 1026 unsigned char *buf; 1027 u8 ua_asc = 0, ua_ascq = 0; 1028 int err = 0; 1029 1030 if (cdb[1] & 0x01) { 1031 pr_err("REQUEST_SENSE description emulation not" 1032 " supported\n"); 1033 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 1034 return -ENOSYS; 1035 } 1036 1037 buf = transport_kmap_first_data_page(cmd); 1038 1039 if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) { 1040 /* 1041 * CURRENT ERROR, UNIT ATTENTION 1042 */ 1043 buf[0] = 0x70; 1044 buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; 1045 /* 1046 * Make sure request data length is enough for additional 1047 * sense data. 1048 */ 1049 if (cmd->data_length <= 18) { 1050 buf[7] = 0x00; 1051 err = -EINVAL; 1052 goto end; 1053 } 1054 /* 1055 * The Additional Sense Code (ASC) from the UNIT ATTENTION 1056 */ 1057 buf[SPC_ASC_KEY_OFFSET] = ua_asc; 1058 buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; 1059 buf[7] = 0x0A; 1060 } else { 1061 /* 1062 * CURRENT ERROR, NO SENSE 1063 */ 1064 buf[0] = 0x70; 1065 buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; 1066 /* 1067 * Make sure request data length is enough for additional 1068 * sense data. 1069 */ 1070 if (cmd->data_length <= 18) { 1071 buf[7] = 0x00; 1072 err = -EINVAL; 1073 goto end; 1074 } 1075 /* 1076 * NO ADDITIONAL SENSE INFORMATION 1077 */ 1078 buf[SPC_ASC_KEY_OFFSET] = 0x00; 1079 buf[7] = 0x0A; 1080 } 1081 1082end: 1083 transport_kunmap_first_data_page(cmd); 1084 task->task_scsi_status = GOOD; 1085 transport_complete_task(task, 1); 1086 return 0; 1087} 1088 1089/* 1090 * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. 1091 * Note this is not used for TCM/pSCSI passthrough 1092 */ 1093int target_emulate_unmap(struct se_task *task) 1094{ 1095 struct se_cmd *cmd = task->task_se_cmd; 1096 struct se_device *dev = cmd->se_dev; 1097 unsigned char *buf, *ptr = NULL; 1098 unsigned char *cdb = &cmd->t_task_cdb[0]; 1099 sector_t lba; 1100 unsigned int size = cmd->data_length, range; 1101 int ret = 0, offset; 1102 unsigned short dl, bd_dl; 1103 1104 if (!dev->transport->do_discard) { 1105 pr_err("UNMAP emulation not supported for: %s\n", 1106 dev->transport->name); 1107 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; 1108 return -ENOSYS; 1109 } 1110 1111 /* First UNMAP block descriptor starts at 8 byte offset */ 1112 offset = 8; 1113 size -= 8; 1114 dl = get_unaligned_be16(&cdb[0]); 1115 bd_dl = get_unaligned_be16(&cdb[2]); 1116 1117 buf = transport_kmap_first_data_page(cmd); 1118 1119 ptr = &buf[offset]; 1120 pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu" 1121 " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); 1122 1123 while (size) { 1124 lba = get_unaligned_be64(&ptr[0]); 1125 range = get_unaligned_be32(&ptr[8]); 1126 pr_debug("UNMAP: Using lba: %llu and range: %u\n", 1127 (unsigned long long)lba, range); 1128 1129 ret = dev->transport->do_discard(dev, lba, range); 1130 if (ret < 0) { 1131 pr_err("blkdev_issue_discard() failed: %d\n", 1132 ret); 1133 goto err; 1134 } 1135 1136 ptr += 16; 1137 size -= 16; 1138 } 1139 1140err: 1141 transport_kunmap_first_data_page(cmd); 1142 if (!ret) { 1143 task->task_scsi_status = GOOD; 1144 transport_complete_task(task, 1); 1145 } 1146 return ret; 1147} 1148 1149/* 1150 * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. 1151 * Note this is not used for TCM/pSCSI passthrough 1152 */ 1153int target_emulate_write_same(struct se_task *task) 1154{ 1155 struct se_cmd *cmd = task->task_se_cmd; 1156 struct se_device *dev = cmd->se_dev; 1157 sector_t range; 1158 sector_t lba = cmd->t_task_lba; 1159 u32 num_blocks; 1160 int ret; 1161 1162 if (!dev->transport->do_discard) { 1163 pr_err("WRITE_SAME emulation not supported" 1164 " for: %s\n", dev->transport->name); 1165 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; 1166 return -ENOSYS; 1167 } 1168 1169 if (cmd->t_task_cdb[0] == WRITE_SAME) 1170 num_blocks = get_unaligned_be16(&cmd->t_task_cdb[7]); 1171 else if (cmd->t_task_cdb[0] == WRITE_SAME_16) 1172 num_blocks = get_unaligned_be32(&cmd->t_task_cdb[10]); 1173 else /* WRITE_SAME_32 via VARIABLE_LENGTH_CMD */ 1174 num_blocks = get_unaligned_be32(&cmd->t_task_cdb[28]); 1175 1176 /* 1177 * Use the explicit range when non zero is supplied, otherwise calculate 1178 * the remaining range based on ->get_blocks() - starting LBA. 1179 */ 1180 if (num_blocks != 0) 1181 range = num_blocks; 1182 else 1183 range = (dev->transport->get_blocks(dev) - lba); 1184 1185 pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n", 1186 (unsigned long long)lba, (unsigned long long)range); 1187 1188 ret = dev->transport->do_discard(dev, lba, range); 1189 if (ret < 0) { 1190 pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n"); 1191 return ret; 1192 } 1193 1194 task->task_scsi_status = GOOD; 1195 transport_complete_task(task, 1); 1196 return 0; 1197} 1198 1199int target_emulate_synchronize_cache(struct se_task *task) 1200{ 1201 struct se_device *dev = task->task_se_cmd->se_dev; 1202 struct se_cmd *cmd = task->task_se_cmd; 1203 1204 if (!dev->transport->do_sync_cache) { 1205 pr_err("SYNCHRONIZE_CACHE emulation not supported" 1206 " for: %s\n", dev->transport->name); 1207 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; 1208 return -ENOSYS; 1209 } 1210 1211 dev->transport->do_sync_cache(task); 1212 return 0; 1213} 1214 1215int target_emulate_noop(struct se_task *task) 1216{ 1217 task->task_scsi_status = GOOD; 1218 transport_complete_task(task, 1); 1219 return 0; 1220} 1221 1222/* 1223 * Write a CDB into @cdb that is based on the one the intiator sent us, 1224 * but updated to only cover the sectors that the current task handles. 1225 */ 1226void target_get_task_cdb(struct se_task *task, unsigned char *cdb) 1227{ 1228 struct se_cmd *cmd = task->task_se_cmd; 1229 unsigned int cdb_len = scsi_command_size(cmd->t_task_cdb); 1230 1231 memcpy(cdb, cmd->t_task_cdb, cdb_len); 1232 if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) { 1233 unsigned long long lba = task->task_lba; 1234 u32 sectors = task->task_sectors; 1235 1236 switch (cdb_len) { 1237 case 6: 1238 /* 21-bit LBA and 8-bit sectors */ 1239 cdb[1] = (lba >> 16) & 0x1f; 1240 cdb[2] = (lba >> 8) & 0xff; 1241 cdb[3] = lba & 0xff; 1242 cdb[4] = sectors & 0xff; 1243 break; 1244 case 10: 1245 /* 32-bit LBA and 16-bit sectors */ 1246 put_unaligned_be32(lba, &cdb[2]); 1247 put_unaligned_be16(sectors, &cdb[7]); 1248 break; 1249 case 12: 1250 /* 32-bit LBA and 32-bit sectors */ 1251 put_unaligned_be32(lba, &cdb[2]); 1252 put_unaligned_be32(sectors, &cdb[6]); 1253 break; 1254 case 16: 1255 /* 64-bit LBA and 32-bit sectors */ 1256 put_unaligned_be64(lba, &cdb[2]); 1257 put_unaligned_be32(sectors, &cdb[10]); 1258 break; 1259 case 32: 1260 /* 64-bit LBA and 32-bit sectors, extended CDB */ 1261 put_unaligned_be64(lba, &cdb[12]); 1262 put_unaligned_be32(sectors, &cdb[28]); 1263 break; 1264 default: 1265 BUG(); 1266 } 1267 } 1268} 1269EXPORT_SYMBOL(target_get_task_cdb); 1270