target_core_cdb.c revision 4949314c7283ea4f9ade182ca599583b89f7edd6
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_data_sg(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 * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2 99 * 100 * SPC4 says: 101 * A RESPONSE DATA FORMAT field set to 2h indicates that the 102 * standard INQUIRY data is in the format defined in this 103 * standard. Response data format values less than 2h are 104 * obsolete. Response data format values greater than 2h are 105 * reserved. 106 */ 107 buf[3] = 2; 108 109 /* 110 * Enable SCCS and TPGS fields for Emulated ALUA 111 */ 112 if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) 113 target_fill_alua_data(lun->lun_sep, buf); 114 115 if (cmd->data_length < 8) { 116 buf[4] = 1; /* Set additional length to 1 */ 117 goto out; 118 } 119 120 buf[7] = 0x32; /* Sync=1 and CmdQue=1 */ 121 122 /* 123 * Do not include vendor, product, reversion info in INQUIRY 124 * response payload for cdbs with a small allocation length. 125 */ 126 if (cmd->data_length < 36) { 127 buf[4] = 3; /* Set additional length to 3 */ 128 goto out; 129 } 130 131 snprintf(&buf[8], 8, "LIO-ORG"); 132 snprintf(&buf[16], 16, "%s", dev->se_sub_dev->t10_wwn.model); 133 snprintf(&buf[32], 4, "%s", dev->se_sub_dev->t10_wwn.revision); 134 buf[4] = 31; /* Set additional length to 31 */ 135 136out: 137 transport_kunmap_data_sg(cmd); 138 return 0; 139} 140 141/* unit serial number */ 142static int 143target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) 144{ 145 struct se_device *dev = cmd->se_dev; 146 u16 len = 0; 147 148 if (dev->se_sub_dev->su_dev_flags & 149 SDF_EMULATED_VPD_UNIT_SERIAL) { 150 u32 unit_serial_len; 151 152 unit_serial_len = strlen(dev->se_sub_dev->t10_wwn.unit_serial); 153 unit_serial_len++; /* For NULL Terminator */ 154 155 if (((len + 4) + unit_serial_len) > cmd->data_length) { 156 len += unit_serial_len; 157 buf[2] = ((len >> 8) & 0xff); 158 buf[3] = (len & 0xff); 159 return 0; 160 } 161 len += sprintf(&buf[4], "%s", 162 dev->se_sub_dev->t10_wwn.unit_serial); 163 len++; /* Extra Byte for NULL Terminator */ 164 buf[3] = len; 165 } 166 return 0; 167} 168 169static void 170target_parse_naa_6h_vendor_specific(struct se_device *dev, unsigned char *buf) 171{ 172 unsigned char *p = &dev->se_sub_dev->t10_wwn.unit_serial[0]; 173 int cnt; 174 bool next = true; 175 176 /* 177 * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on 178 * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field 179 * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION 180 * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL 181 * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure 182 * per device uniqeness. 183 */ 184 for (cnt = 0; *p && cnt < 13; p++) { 185 int val = hex_to_bin(*p); 186 187 if (val < 0) 188 continue; 189 190 if (next) { 191 next = false; 192 buf[cnt++] |= val; 193 } else { 194 next = true; 195 buf[cnt] = val << 4; 196 } 197 } 198} 199 200/* 201 * Device identification VPD, for a complete list of 202 * DESIGNATOR TYPEs see spc4r17 Table 459. 203 */ 204static int 205target_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) 206{ 207 struct se_device *dev = cmd->se_dev; 208 struct se_lun *lun = cmd->se_lun; 209 struct se_port *port = NULL; 210 struct se_portal_group *tpg = NULL; 211 struct t10_alua_lu_gp_member *lu_gp_mem; 212 struct t10_alua_tg_pt_gp *tg_pt_gp; 213 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; 214 unsigned char *prod = &dev->se_sub_dev->t10_wwn.model[0]; 215 u32 prod_len; 216 u32 unit_serial_len, off = 0; 217 u16 len = 0, id_len; 218 219 off = 4; 220 221 /* 222 * NAA IEEE Registered Extended Assigned designator format, see 223 * spc4r17 section 7.7.3.6.5 224 * 225 * We depend upon a target_core_mod/ConfigFS provided 226 * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial 227 * value in order to return the NAA id. 228 */ 229 if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL)) 230 goto check_t10_vend_desc; 231 232 if (off + 20 > cmd->data_length) 233 goto check_t10_vend_desc; 234 235 /* CODE SET == Binary */ 236 buf[off++] = 0x1; 237 238 /* Set ASSOCIATION == addressed logical unit: 0)b */ 239 buf[off] = 0x00; 240 241 /* Identifier/Designator type == NAA identifier */ 242 buf[off++] |= 0x3; 243 off++; 244 245 /* Identifier/Designator length */ 246 buf[off++] = 0x10; 247 248 /* 249 * Start NAA IEEE Registered Extended Identifier/Designator 250 */ 251 buf[off++] = (0x6 << 4); 252 253 /* 254 * Use OpenFabrics IEEE Company ID: 00 14 05 255 */ 256 buf[off++] = 0x01; 257 buf[off++] = 0x40; 258 buf[off] = (0x5 << 4); 259 260 /* 261 * Return ConfigFS Unit Serial Number information for 262 * VENDOR_SPECIFIC_IDENTIFIER and 263 * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION 264 */ 265 target_parse_naa_6h_vendor_specific(dev, &buf[off]); 266 267 len = 20; 268 off = (len + 4); 269 270check_t10_vend_desc: 271 /* 272 * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 273 */ 274 id_len = 8; /* For Vendor field */ 275 prod_len = 4; /* For VPD Header */ 276 prod_len += 8; /* For Vendor field */ 277 prod_len += strlen(prod); 278 prod_len++; /* For : */ 279 280 if (dev->se_sub_dev->su_dev_flags & 281 SDF_EMULATED_VPD_UNIT_SERIAL) { 282 unit_serial_len = 283 strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]); 284 unit_serial_len++; /* For NULL Terminator */ 285 286 if ((len + (id_len + 4) + 287 (prod_len + unit_serial_len)) > 288 cmd->data_length) { 289 len += (prod_len + unit_serial_len); 290 goto check_port; 291 } 292 id_len += sprintf(&buf[off+12], "%s:%s", prod, 293 &dev->se_sub_dev->t10_wwn.unit_serial[0]); 294 } 295 buf[off] = 0x2; /* ASCII */ 296 buf[off+1] = 0x1; /* T10 Vendor ID */ 297 buf[off+2] = 0x0; 298 memcpy(&buf[off+4], "LIO-ORG", 8); 299 /* Extra Byte for NULL Terminator */ 300 id_len++; 301 /* Identifier Length */ 302 buf[off+3] = id_len; 303 /* Header size for Designation descriptor */ 304 len += (id_len + 4); 305 off += (id_len + 4); 306 /* 307 * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD 308 */ 309check_port: 310 port = lun->lun_sep; 311 if (port) { 312 struct t10_alua_lu_gp *lu_gp; 313 u32 padding, scsi_name_len; 314 u16 lu_gp_id = 0; 315 u16 tg_pt_gp_id = 0; 316 u16 tpgt; 317 318 tpg = port->sep_tpg; 319 /* 320 * Relative target port identifer, see spc4r17 321 * section 7.7.3.7 322 * 323 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 324 * section 7.5.1 Table 362 325 */ 326 if (((len + 4) + 8) > cmd->data_length) { 327 len += 8; 328 goto check_tpgi; 329 } 330 buf[off] = 331 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); 332 buf[off++] |= 0x1; /* CODE SET == Binary */ 333 buf[off] = 0x80; /* Set PIV=1 */ 334 /* Set ASSOCIATION == target port: 01b */ 335 buf[off] |= 0x10; 336 /* DESIGNATOR TYPE == Relative target port identifer */ 337 buf[off++] |= 0x4; 338 off++; /* Skip over Reserved */ 339 buf[off++] = 4; /* DESIGNATOR LENGTH */ 340 /* Skip over Obsolete field in RTPI payload 341 * in Table 472 */ 342 off += 2; 343 buf[off++] = ((port->sep_rtpi >> 8) & 0xff); 344 buf[off++] = (port->sep_rtpi & 0xff); 345 len += 8; /* Header size + Designation descriptor */ 346 /* 347 * Target port group identifier, see spc4r17 348 * section 7.7.3.8 349 * 350 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 351 * section 7.5.1 Table 362 352 */ 353check_tpgi: 354 if (dev->se_sub_dev->t10_alua.alua_type != 355 SPC3_ALUA_EMULATED) 356 goto check_scsi_name; 357 358 if (((len + 4) + 8) > cmd->data_length) { 359 len += 8; 360 goto check_lu_gp; 361 } 362 tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; 363 if (!tg_pt_gp_mem) 364 goto check_lu_gp; 365 366 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 367 tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; 368 if (!tg_pt_gp) { 369 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 370 goto check_lu_gp; 371 } 372 tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; 373 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 374 375 buf[off] = 376 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); 377 buf[off++] |= 0x1; /* CODE SET == Binary */ 378 buf[off] = 0x80; /* Set PIV=1 */ 379 /* Set ASSOCIATION == target port: 01b */ 380 buf[off] |= 0x10; 381 /* DESIGNATOR TYPE == Target port group identifier */ 382 buf[off++] |= 0x5; 383 off++; /* Skip over Reserved */ 384 buf[off++] = 4; /* DESIGNATOR LENGTH */ 385 off += 2; /* Skip over Reserved Field */ 386 buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); 387 buf[off++] = (tg_pt_gp_id & 0xff); 388 len += 8; /* Header size + Designation descriptor */ 389 /* 390 * Logical Unit Group identifier, see spc4r17 391 * section 7.7.3.8 392 */ 393check_lu_gp: 394 if (((len + 4) + 8) > cmd->data_length) { 395 len += 8; 396 goto check_scsi_name; 397 } 398 lu_gp_mem = dev->dev_alua_lu_gp_mem; 399 if (!lu_gp_mem) 400 goto check_scsi_name; 401 402 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 403 lu_gp = lu_gp_mem->lu_gp; 404 if (!lu_gp) { 405 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 406 goto check_scsi_name; 407 } 408 lu_gp_id = lu_gp->lu_gp_id; 409 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 410 411 buf[off++] |= 0x1; /* CODE SET == Binary */ 412 /* DESIGNATOR TYPE == Logical Unit Group identifier */ 413 buf[off++] |= 0x6; 414 off++; /* Skip over Reserved */ 415 buf[off++] = 4; /* DESIGNATOR LENGTH */ 416 off += 2; /* Skip over Reserved Field */ 417 buf[off++] = ((lu_gp_id >> 8) & 0xff); 418 buf[off++] = (lu_gp_id & 0xff); 419 len += 8; /* Header size + Designation descriptor */ 420 /* 421 * SCSI name string designator, see spc4r17 422 * section 7.7.3.11 423 * 424 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 425 * section 7.5.1 Table 362 426 */ 427check_scsi_name: 428 scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg)); 429 /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */ 430 scsi_name_len += 10; 431 /* Check for 4-byte padding */ 432 padding = ((-scsi_name_len) & 3); 433 if (padding != 0) 434 scsi_name_len += padding; 435 /* Header size + Designation descriptor */ 436 scsi_name_len += 4; 437 438 if (((len + 4) + scsi_name_len) > cmd->data_length) { 439 len += scsi_name_len; 440 goto set_len; 441 } 442 buf[off] = 443 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); 444 buf[off++] |= 0x3; /* CODE SET == UTF-8 */ 445 buf[off] = 0x80; /* Set PIV=1 */ 446 /* Set ASSOCIATION == target port: 01b */ 447 buf[off] |= 0x10; 448 /* DESIGNATOR TYPE == SCSI name string */ 449 buf[off++] |= 0x8; 450 off += 2; /* Skip over Reserved and length */ 451 /* 452 * SCSI name string identifer containing, $FABRIC_MOD 453 * dependent information. For LIO-Target and iSCSI 454 * Target Port, this means "<iSCSI name>,t,0x<TPGT> in 455 * UTF-8 encoding. 456 */ 457 tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); 458 scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", 459 tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); 460 scsi_name_len += 1 /* Include NULL terminator */; 461 /* 462 * The null-terminated, null-padded (see 4.4.2) SCSI 463 * NAME STRING field contains a UTF-8 format string. 464 * The number of bytes in the SCSI NAME STRING field 465 * (i.e., the value in the DESIGNATOR LENGTH field) 466 * shall be no larger than 256 and shall be a multiple 467 * of four. 468 */ 469 if (padding) 470 scsi_name_len += padding; 471 472 buf[off-1] = scsi_name_len; 473 off += scsi_name_len; 474 /* Header size + Designation descriptor */ 475 len += (scsi_name_len + 4); 476 } 477set_len: 478 buf[2] = ((len >> 8) & 0xff); 479 buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ 480 return 0; 481} 482 483/* Extended INQUIRY Data VPD Page */ 484static int 485target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) 486{ 487 if (cmd->data_length < 60) 488 return 0; 489 490 buf[3] = 0x3c; 491 /* Set HEADSUP, ORDSUP, SIMPSUP */ 492 buf[5] = 0x07; 493 494 /* If WriteCache emulation is enabled, set V_SUP */ 495 if (cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) 496 buf[6] = 0x01; 497 return 0; 498} 499 500/* Block Limits VPD page */ 501static int 502target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) 503{ 504 struct se_device *dev = cmd->se_dev; 505 int have_tp = 0; 506 507 /* 508 * Following sbc3r22 section 6.5.3 Block Limits VPD page, when 509 * emulate_tpu=1 or emulate_tpws=1 we will be expect a 510 * different page length for Thin Provisioning. 511 */ 512 if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) 513 have_tp = 1; 514 515 if (cmd->data_length < (0x10 + 4)) { 516 pr_debug("Received data_length: %u" 517 " too small for EVPD 0xb0\n", 518 cmd->data_length); 519 return -EINVAL; 520 } 521 522 if (have_tp && cmd->data_length < (0x3c + 4)) { 523 pr_debug("Received data_length: %u" 524 " too small for TPE=1 EVPD 0xb0\n", 525 cmd->data_length); 526 have_tp = 0; 527 } 528 529 buf[0] = dev->transport->get_device_type(dev); 530 buf[3] = have_tp ? 0x3c : 0x10; 531 532 /* Set WSNZ to 1 */ 533 buf[4] = 0x01; 534 535 /* 536 * Set OPTIMAL TRANSFER LENGTH GRANULARITY 537 */ 538 put_unaligned_be16(1, &buf[6]); 539 540 /* 541 * Set MAXIMUM TRANSFER LENGTH 542 */ 543 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_sectors, &buf[8]); 544 545 /* 546 * Set OPTIMAL TRANSFER LENGTH 547 */ 548 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.optimal_sectors, &buf[12]); 549 550 /* 551 * Exit now if we don't support TP or the initiator sent a too 552 * short buffer. 553 */ 554 if (!have_tp || cmd->data_length < (0x3c + 4)) 555 return 0; 556 557 /* 558 * Set MAXIMUM UNMAP LBA COUNT 559 */ 560 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count, &buf[20]); 561 562 /* 563 * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT 564 */ 565 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count, 566 &buf[24]); 567 568 /* 569 * Set OPTIMAL UNMAP GRANULARITY 570 */ 571 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity, &buf[28]); 572 573 /* 574 * UNMAP GRANULARITY ALIGNMENT 575 */ 576 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment, 577 &buf[32]); 578 if (dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment != 0) 579 buf[32] |= 0x80; /* Set the UGAVALID bit */ 580 581 return 0; 582} 583 584/* Block Device Characteristics VPD page */ 585static int 586target_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) 587{ 588 struct se_device *dev = cmd->se_dev; 589 590 buf[0] = dev->transport->get_device_type(dev); 591 buf[3] = 0x3c; 592 593 if (cmd->data_length >= 5 && 594 dev->se_sub_dev->se_dev_attrib.is_nonrot) 595 buf[5] = 1; 596 597 return 0; 598} 599 600/* Thin Provisioning VPD */ 601static int 602target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) 603{ 604 struct se_device *dev = cmd->se_dev; 605 606 /* 607 * From sbc3r22 section 6.5.4 Thin Provisioning VPD page: 608 * 609 * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to 610 * zero, then the page length shall be set to 0004h. If the DP bit 611 * is set to one, then the page length shall be set to the value 612 * defined in table 162. 613 */ 614 buf[0] = dev->transport->get_device_type(dev); 615 616 /* 617 * Set Hardcoded length mentioned above for DP=0 618 */ 619 put_unaligned_be16(0x0004, &buf[2]); 620 621 /* 622 * The THRESHOLD EXPONENT field indicates the threshold set size in 623 * LBAs as a power of 2 (i.e., the threshold set size is equal to 624 * 2(threshold exponent)). 625 * 626 * Note that this is currently set to 0x00 as mkp says it will be 627 * changing again. We can enable this once it has settled in T10 628 * and is actually used by Linux/SCSI ML code. 629 */ 630 buf[4] = 0x00; 631 632 /* 633 * A TPU bit set to one indicates that the device server supports 634 * the UNMAP command (see 5.25). A TPU bit set to zero indicates 635 * that the device server does not support the UNMAP command. 636 */ 637 if (dev->se_sub_dev->se_dev_attrib.emulate_tpu != 0) 638 buf[5] = 0x80; 639 640 /* 641 * A TPWS bit set to one indicates that the device server supports 642 * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. 643 * A TPWS bit set to zero indicates that the device server does not 644 * support the use of the WRITE SAME (16) command to unmap LBAs. 645 */ 646 if (dev->se_sub_dev->se_dev_attrib.emulate_tpws != 0) 647 buf[5] |= 0x40; 648 649 return 0; 650} 651 652static int 653target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); 654 655static struct { 656 uint8_t page; 657 int (*emulate)(struct se_cmd *, unsigned char *); 658} evpd_handlers[] = { 659 { .page = 0x00, .emulate = target_emulate_evpd_00 }, 660 { .page = 0x80, .emulate = target_emulate_evpd_80 }, 661 { .page = 0x83, .emulate = target_emulate_evpd_83 }, 662 { .page = 0x86, .emulate = target_emulate_evpd_86 }, 663 { .page = 0xb0, .emulate = target_emulate_evpd_b0 }, 664 { .page = 0xb1, .emulate = target_emulate_evpd_b1 }, 665 { .page = 0xb2, .emulate = target_emulate_evpd_b2 }, 666}; 667 668/* supported vital product data pages */ 669static int 670target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) 671{ 672 int p; 673 674 if (cmd->data_length < 8) 675 return 0; 676 /* 677 * Only report the INQUIRY EVPD=1 pages after a valid NAA 678 * Registered Extended LUN WWN has been set via ConfigFS 679 * during device creation/restart. 680 */ 681 if (cmd->se_dev->se_sub_dev->su_dev_flags & 682 SDF_EMULATED_VPD_UNIT_SERIAL) { 683 buf[3] = ARRAY_SIZE(evpd_handlers); 684 for (p = 0; p < min_t(int, ARRAY_SIZE(evpd_handlers), 685 cmd->data_length - 4); ++p) 686 buf[p + 4] = evpd_handlers[p].page; 687 } 688 689 return 0; 690} 691 692int target_emulate_inquiry(struct se_task *task) 693{ 694 struct se_cmd *cmd = task->task_se_cmd; 695 struct se_device *dev = cmd->se_dev; 696 unsigned char *buf; 697 unsigned char *cdb = cmd->t_task_cdb; 698 int p, ret; 699 700 if (!(cdb[1] & 0x1)) { 701 ret = target_emulate_inquiry_std(cmd); 702 goto out; 703 } 704 705 /* 706 * Make sure we at least have 4 bytes of INQUIRY response 707 * payload for 0x00 going back for EVPD=1. Note that 0x80 708 * and 0x83 will check for enough payload data length and 709 * jump to set_len: label when there is not enough inquiry EVPD 710 * payload length left for the next outgoing EVPD metadata 711 */ 712 if (cmd->data_length < 4) { 713 pr_err("SCSI Inquiry payload length: %u" 714 " too small for EVPD=1\n", cmd->data_length); 715 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 716 return -EINVAL; 717 } 718 719 buf = transport_kmap_data_sg(cmd); 720 721 buf[0] = dev->transport->get_device_type(dev); 722 723 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) { 724 if (cdb[2] == evpd_handlers[p].page) { 725 buf[1] = cdb[2]; 726 ret = evpd_handlers[p].emulate(cmd, buf); 727 goto out_unmap; 728 } 729 } 730 731 pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); 732 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; 733 ret = -EINVAL; 734 735out_unmap: 736 transport_kunmap_data_sg(cmd); 737out: 738 if (!ret) { 739 task->task_scsi_status = GOOD; 740 transport_complete_task(task, 1); 741 } 742 return ret; 743} 744 745int target_emulate_readcapacity(struct se_task *task) 746{ 747 struct se_cmd *cmd = task->task_se_cmd; 748 struct se_device *dev = cmd->se_dev; 749 unsigned char *buf; 750 unsigned long long blocks_long = dev->transport->get_blocks(dev); 751 u32 blocks; 752 753 if (blocks_long >= 0x00000000ffffffff) 754 blocks = 0xffffffff; 755 else 756 blocks = (u32)blocks_long; 757 758 buf = transport_kmap_data_sg(cmd); 759 760 buf[0] = (blocks >> 24) & 0xff; 761 buf[1] = (blocks >> 16) & 0xff; 762 buf[2] = (blocks >> 8) & 0xff; 763 buf[3] = blocks & 0xff; 764 buf[4] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; 765 buf[5] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; 766 buf[6] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; 767 buf[7] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; 768 /* 769 * Set max 32-bit blocks to signal SERVICE ACTION READ_CAPACITY_16 770 */ 771 if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) 772 put_unaligned_be32(0xFFFFFFFF, &buf[0]); 773 774 transport_kunmap_data_sg(cmd); 775 776 task->task_scsi_status = GOOD; 777 transport_complete_task(task, 1); 778 return 0; 779} 780 781int target_emulate_readcapacity_16(struct se_task *task) 782{ 783 struct se_cmd *cmd = task->task_se_cmd; 784 struct se_device *dev = cmd->se_dev; 785 unsigned char *buf; 786 unsigned long long blocks = dev->transport->get_blocks(dev); 787 788 buf = transport_kmap_data_sg(cmd); 789 790 buf[0] = (blocks >> 56) & 0xff; 791 buf[1] = (blocks >> 48) & 0xff; 792 buf[2] = (blocks >> 40) & 0xff; 793 buf[3] = (blocks >> 32) & 0xff; 794 buf[4] = (blocks >> 24) & 0xff; 795 buf[5] = (blocks >> 16) & 0xff; 796 buf[6] = (blocks >> 8) & 0xff; 797 buf[7] = blocks & 0xff; 798 buf[8] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; 799 buf[9] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; 800 buf[10] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; 801 buf[11] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; 802 /* 803 * Set Thin Provisioning Enable bit following sbc3r22 in section 804 * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled. 805 */ 806 if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) 807 buf[14] = 0x80; 808 809 transport_kunmap_data_sg(cmd); 810 811 task->task_scsi_status = GOOD; 812 transport_complete_task(task, 1); 813 return 0; 814} 815 816static int 817target_modesense_rwrecovery(unsigned char *p) 818{ 819 p[0] = 0x01; 820 p[1] = 0x0a; 821 822 return 12; 823} 824 825static int 826target_modesense_control(struct se_device *dev, unsigned char *p) 827{ 828 p[0] = 0x0a; 829 p[1] = 0x0a; 830 p[2] = 2; 831 /* 832 * From spc4r23, 7.4.7 Control mode page 833 * 834 * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies 835 * restrictions on the algorithm used for reordering commands 836 * having the SIMPLE task attribute (see SAM-4). 837 * 838 * Table 368 -- QUEUE ALGORITHM MODIFIER field 839 * Code Description 840 * 0h Restricted reordering 841 * 1h Unrestricted reordering allowed 842 * 2h to 7h Reserved 843 * 8h to Fh Vendor specific 844 * 845 * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that 846 * the device server shall order the processing sequence of commands 847 * having the SIMPLE task attribute such that data integrity is maintained 848 * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol 849 * requests is halted at any time, the final value of all data observable 850 * on the medium shall be the same as if all the commands had been processed 851 * with the ORDERED task attribute). 852 * 853 * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the 854 * device server may reorder the processing sequence of commands having the 855 * SIMPLE task attribute in any manner. Any data integrity exposures related to 856 * command sequence order shall be explicitly handled by the application client 857 * through the selection of appropriate ommands and task attributes. 858 */ 859 p[3] = (dev->se_sub_dev->se_dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; 860 /* 861 * From spc4r17, section 7.4.6 Control mode Page 862 * 863 * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b 864 * 865 * 00b: The logical unit shall clear any unit attention condition 866 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION 867 * status and shall not establish a unit attention condition when a com- 868 * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT 869 * status. 870 * 871 * 10b: The logical unit shall not clear any unit attention condition 872 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION 873 * status and shall not establish a unit attention condition when 874 * a command is completed with BUSY, TASK SET FULL, or RESERVATION 875 * CONFLICT status. 876 * 877 * 11b a The logical unit shall not clear any unit attention condition 878 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION 879 * status and shall establish a unit attention condition for the 880 * initiator port associated with the I_T nexus on which the BUSY, 881 * TASK SET FULL, or RESERVATION CONFLICT status is being returned. 882 * Depending on the status, the additional sense code shall be set to 883 * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS 884 * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE 885 * command, a unit attention condition shall be established only once 886 * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless 887 * to the number of commands completed with one of those status codes. 888 */ 889 p[4] = (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : 890 (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; 891 /* 892 * From spc4r17, section 7.4.6 Control mode Page 893 * 894 * Task Aborted Status (TAS) bit set to zero. 895 * 896 * A task aborted status (TAS) bit set to zero specifies that aborted 897 * tasks shall be terminated by the device server without any response 898 * to the application client. A TAS bit set to one specifies that tasks 899 * aborted by the actions of an I_T nexus other than the I_T nexus on 900 * which the command was received shall be completed with TASK ABORTED 901 * status (see SAM-4). 902 */ 903 p[5] = (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? 0x40 : 0x00; 904 p[8] = 0xff; 905 p[9] = 0xff; 906 p[11] = 30; 907 908 return 12; 909} 910 911static int 912target_modesense_caching(struct se_device *dev, unsigned char *p) 913{ 914 p[0] = 0x08; 915 p[1] = 0x12; 916 if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) 917 p[2] = 0x04; /* Write Cache Enable */ 918 p[12] = 0x20; /* Disabled Read Ahead */ 919 920 return 20; 921} 922 923static void 924target_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 939static void 940target_modesense_dpofua(unsigned char *buf, int type) 941{ 942 switch (type) { 943 case TYPE_DISK: 944 buf[0] |= 0x10; /* DPOFUA bit */ 945 break; 946 default: 947 break; 948 } 949} 950 951int target_emulate_modesense(struct se_task *task) 952{ 953 struct se_cmd *cmd = task->task_se_cmd; 954 struct se_device *dev = cmd->se_dev; 955 char *cdb = cmd->t_task_cdb; 956 unsigned char *rbuf; 957 int type = dev->transport->get_device_type(dev); 958 int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10); 959 int offset = ten ? 8 : 4; 960 int length = 0; 961 unsigned char buf[SE_MODE_PAGE_BUF]; 962 963 memset(buf, 0, SE_MODE_PAGE_BUF); 964 965 switch (cdb[2] & 0x3f) { 966 case 0x01: 967 length = target_modesense_rwrecovery(&buf[offset]); 968 break; 969 case 0x08: 970 length = target_modesense_caching(dev, &buf[offset]); 971 break; 972 case 0x0a: 973 length = target_modesense_control(dev, &buf[offset]); 974 break; 975 case 0x3f: 976 length = target_modesense_rwrecovery(&buf[offset]); 977 length += target_modesense_caching(dev, &buf[offset+length]); 978 length += target_modesense_control(dev, &buf[offset+length]); 979 break; 980 default: 981 pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", 982 cdb[2] & 0x3f, cdb[3]); 983 cmd->scsi_sense_reason = TCM_UNKNOWN_MODE_PAGE; 984 return -EINVAL; 985 } 986 offset += length; 987 988 if (ten) { 989 offset -= 2; 990 buf[0] = (offset >> 8) & 0xff; 991 buf[1] = offset & 0xff; 992 993 if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || 994 (cmd->se_deve && 995 (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) 996 target_modesense_write_protect(&buf[3], type); 997 998 if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && 999 (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) 1000 target_modesense_dpofua(&buf[3], type); 1001 1002 if ((offset + 2) > cmd->data_length) 1003 offset = cmd->data_length; 1004 1005 } else { 1006 offset -= 1; 1007 buf[0] = offset & 0xff; 1008 1009 if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || 1010 (cmd->se_deve && 1011 (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) 1012 target_modesense_write_protect(&buf[2], type); 1013 1014 if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && 1015 (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) 1016 target_modesense_dpofua(&buf[2], type); 1017 1018 if ((offset + 1) > cmd->data_length) 1019 offset = cmd->data_length; 1020 } 1021 1022 rbuf = transport_kmap_data_sg(cmd); 1023 memcpy(rbuf, buf, offset); 1024 transport_kunmap_data_sg(cmd); 1025 1026 task->task_scsi_status = GOOD; 1027 transport_complete_task(task, 1); 1028 return 0; 1029} 1030 1031int target_emulate_request_sense(struct se_task *task) 1032{ 1033 struct se_cmd *cmd = task->task_se_cmd; 1034 unsigned char *cdb = cmd->t_task_cdb; 1035 unsigned char *buf; 1036 u8 ua_asc = 0, ua_ascq = 0; 1037 int err = 0; 1038 1039 if (cdb[1] & 0x01) { 1040 pr_err("REQUEST_SENSE description emulation not" 1041 " supported\n"); 1042 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 1043 return -ENOSYS; 1044 } 1045 1046 buf = transport_kmap_data_sg(cmd); 1047 1048 if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) { 1049 /* 1050 * CURRENT ERROR, UNIT ATTENTION 1051 */ 1052 buf[0] = 0x70; 1053 buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; 1054 /* 1055 * Make sure request data length is enough for additional 1056 * sense data. 1057 */ 1058 if (cmd->data_length <= 18) { 1059 buf[7] = 0x00; 1060 err = -EINVAL; 1061 goto end; 1062 } 1063 /* 1064 * The Additional Sense Code (ASC) from the UNIT ATTENTION 1065 */ 1066 buf[SPC_ASC_KEY_OFFSET] = ua_asc; 1067 buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; 1068 buf[7] = 0x0A; 1069 } else { 1070 /* 1071 * CURRENT ERROR, NO SENSE 1072 */ 1073 buf[0] = 0x70; 1074 buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; 1075 /* 1076 * Make sure request data length is enough for additional 1077 * sense data. 1078 */ 1079 if (cmd->data_length <= 18) { 1080 buf[7] = 0x00; 1081 err = -EINVAL; 1082 goto end; 1083 } 1084 /* 1085 * NO ADDITIONAL SENSE INFORMATION 1086 */ 1087 buf[SPC_ASC_KEY_OFFSET] = 0x00; 1088 buf[7] = 0x0A; 1089 } 1090 1091end: 1092 transport_kunmap_data_sg(cmd); 1093 task->task_scsi_status = GOOD; 1094 transport_complete_task(task, 1); 1095 return 0; 1096} 1097 1098/* 1099 * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. 1100 * Note this is not used for TCM/pSCSI passthrough 1101 */ 1102int target_emulate_unmap(struct se_task *task) 1103{ 1104 struct se_cmd *cmd = task->task_se_cmd; 1105 struct se_device *dev = cmd->se_dev; 1106 unsigned char *buf, *ptr = NULL; 1107 unsigned char *cdb = &cmd->t_task_cdb[0]; 1108 sector_t lba; 1109 unsigned int size = cmd->data_length, range; 1110 int ret = 0, offset; 1111 unsigned short dl, bd_dl; 1112 1113 if (!dev->transport->do_discard) { 1114 pr_err("UNMAP emulation not supported for: %s\n", 1115 dev->transport->name); 1116 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; 1117 return -ENOSYS; 1118 } 1119 1120 /* First UNMAP block descriptor starts at 8 byte offset */ 1121 offset = 8; 1122 size -= 8; 1123 dl = get_unaligned_be16(&cdb[0]); 1124 bd_dl = get_unaligned_be16(&cdb[2]); 1125 1126 buf = transport_kmap_data_sg(cmd); 1127 1128 ptr = &buf[offset]; 1129 pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu" 1130 " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); 1131 1132 while (size) { 1133 lba = get_unaligned_be64(&ptr[0]); 1134 range = get_unaligned_be32(&ptr[8]); 1135 pr_debug("UNMAP: Using lba: %llu and range: %u\n", 1136 (unsigned long long)lba, range); 1137 1138 ret = dev->transport->do_discard(dev, lba, range); 1139 if (ret < 0) { 1140 pr_err("blkdev_issue_discard() failed: %d\n", 1141 ret); 1142 goto err; 1143 } 1144 1145 ptr += 16; 1146 size -= 16; 1147 } 1148 1149err: 1150 transport_kunmap_data_sg(cmd); 1151 if (!ret) { 1152 task->task_scsi_status = GOOD; 1153 transport_complete_task(task, 1); 1154 } 1155 return ret; 1156} 1157 1158/* 1159 * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. 1160 * Note this is not used for TCM/pSCSI passthrough 1161 */ 1162int target_emulate_write_same(struct se_task *task) 1163{ 1164 struct se_cmd *cmd = task->task_se_cmd; 1165 struct se_device *dev = cmd->se_dev; 1166 sector_t range; 1167 sector_t lba = cmd->t_task_lba; 1168 u32 num_blocks; 1169 int ret; 1170 1171 if (!dev->transport->do_discard) { 1172 pr_err("WRITE_SAME emulation not supported" 1173 " for: %s\n", dev->transport->name); 1174 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; 1175 return -ENOSYS; 1176 } 1177 1178 if (cmd->t_task_cdb[0] == WRITE_SAME) 1179 num_blocks = get_unaligned_be16(&cmd->t_task_cdb[7]); 1180 else if (cmd->t_task_cdb[0] == WRITE_SAME_16) 1181 num_blocks = get_unaligned_be32(&cmd->t_task_cdb[10]); 1182 else /* WRITE_SAME_32 via VARIABLE_LENGTH_CMD */ 1183 num_blocks = get_unaligned_be32(&cmd->t_task_cdb[28]); 1184 1185 /* 1186 * Use the explicit range when non zero is supplied, otherwise calculate 1187 * the remaining range based on ->get_blocks() - starting LBA. 1188 */ 1189 if (num_blocks != 0) 1190 range = num_blocks; 1191 else 1192 range = (dev->transport->get_blocks(dev) - lba); 1193 1194 pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n", 1195 (unsigned long long)lba, (unsigned long long)range); 1196 1197 ret = dev->transport->do_discard(dev, lba, range); 1198 if (ret < 0) { 1199 pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n"); 1200 return ret; 1201 } 1202 1203 task->task_scsi_status = GOOD; 1204 transport_complete_task(task, 1); 1205 return 0; 1206} 1207 1208int target_emulate_synchronize_cache(struct se_task *task) 1209{ 1210 struct se_device *dev = task->task_se_cmd->se_dev; 1211 struct se_cmd *cmd = task->task_se_cmd; 1212 1213 if (!dev->transport->do_sync_cache) { 1214 pr_err("SYNCHRONIZE_CACHE emulation not supported" 1215 " for: %s\n", dev->transport->name); 1216 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; 1217 return -ENOSYS; 1218 } 1219 1220 dev->transport->do_sync_cache(task); 1221 return 0; 1222} 1223 1224int target_emulate_noop(struct se_task *task) 1225{ 1226 task->task_scsi_status = GOOD; 1227 transport_complete_task(task, 1); 1228 return 0; 1229} 1230 1231/* 1232 * Write a CDB into @cdb that is based on the one the intiator sent us, 1233 * but updated to only cover the sectors that the current task handles. 1234 */ 1235void target_get_task_cdb(struct se_task *task, unsigned char *cdb) 1236{ 1237 struct se_cmd *cmd = task->task_se_cmd; 1238 unsigned int cdb_len = scsi_command_size(cmd->t_task_cdb); 1239 1240 memcpy(cdb, cmd->t_task_cdb, cdb_len); 1241 if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) { 1242 unsigned long long lba = task->task_lba; 1243 u32 sectors = task->task_sectors; 1244 1245 switch (cdb_len) { 1246 case 6: 1247 /* 21-bit LBA and 8-bit sectors */ 1248 cdb[1] = (lba >> 16) & 0x1f; 1249 cdb[2] = (lba >> 8) & 0xff; 1250 cdb[3] = lba & 0xff; 1251 cdb[4] = sectors & 0xff; 1252 break; 1253 case 10: 1254 /* 32-bit LBA and 16-bit sectors */ 1255 put_unaligned_be32(lba, &cdb[2]); 1256 put_unaligned_be16(sectors, &cdb[7]); 1257 break; 1258 case 12: 1259 /* 32-bit LBA and 32-bit sectors */ 1260 put_unaligned_be32(lba, &cdb[2]); 1261 put_unaligned_be32(sectors, &cdb[6]); 1262 break; 1263 case 16: 1264 /* 64-bit LBA and 32-bit sectors */ 1265 put_unaligned_be64(lba, &cdb[2]); 1266 put_unaligned_be32(sectors, &cdb[10]); 1267 break; 1268 case 32: 1269 /* 64-bit LBA and 32-bit sectors, extended CDB */ 1270 put_unaligned_be64(lba, &cdb[12]); 1271 put_unaligned_be32(sectors, &cdb[28]); 1272 break; 1273 default: 1274 BUG(); 1275 } 1276 } 1277} 1278EXPORT_SYMBOL(target_get_task_cdb); 1279