target_core_cdb.c revision 485fd0d1e3b8010b538bd0b209f3592acc825677
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 <asm/unaligned.h> 28#include <scsi/scsi.h> 29 30#include <target/target_core_base.h> 31#include <target/target_core_transport.h> 32#include <target/target_core_fabric_ops.h> 33#include "target_core_ua.h" 34 35static void 36target_fill_alua_data(struct se_port *port, unsigned char *buf) 37{ 38 struct t10_alua_tg_pt_gp *tg_pt_gp; 39 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; 40 41 /* 42 * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS. 43 */ 44 buf[5] = 0x80; 45 46 /* 47 * Set TPGS field for explict and/or implict ALUA access type 48 * and opteration. 49 * 50 * See spc4r17 section 6.4.2 Table 135 51 */ 52 if (!port) 53 return; 54 tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; 55 if (!tg_pt_gp_mem) 56 return; 57 58 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 59 tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; 60 if (tg_pt_gp) 61 buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; 62 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 63} 64 65static int 66target_emulate_inquiry_std(struct se_cmd *cmd) 67{ 68 struct se_lun *lun = cmd->se_lun; 69 struct se_device *dev = cmd->se_dev; 70 struct se_portal_group *tpg = lun->lun_sep->sep_tpg; 71 unsigned char *buf; 72 73 /* 74 * Make sure we at least have 6 bytes of INQUIRY response 75 * payload going back for EVPD=0 76 */ 77 if (cmd->data_length < 6) { 78 pr_err("SCSI Inquiry payload length: %u" 79 " too small for EVPD=0\n", cmd->data_length); 80 return -EINVAL; 81 } 82 83 buf = transport_kmap_first_data_page(cmd); 84 85 if (dev == tpg->tpg_virt_lun0.lun_se_dev) { 86 buf[0] = 0x3f; /* Not connected */ 87 } else { 88 buf[0] = dev->transport->get_device_type(dev); 89 if (buf[0] == TYPE_TAPE) 90 buf[1] = 0x80; 91 } 92 buf[2] = dev->transport->get_device_rev(dev); 93 94 /* 95 * Enable SCCS and TPGS fields for Emulated ALUA 96 */ 97 if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) 98 target_fill_alua_data(lun->lun_sep, buf); 99 100 if (cmd->data_length < 8) { 101 buf[4] = 1; /* Set additional length to 1 */ 102 goto out; 103 } 104 105 buf[7] = 0x32; /* Sync=1 and CmdQue=1 */ 106 107 /* 108 * Do not include vendor, product, reversion info in INQUIRY 109 * response payload for cdbs with a small allocation length. 110 */ 111 if (cmd->data_length < 36) { 112 buf[4] = 3; /* Set additional length to 3 */ 113 goto out; 114 } 115 116 snprintf((unsigned char *)&buf[8], 8, "LIO-ORG"); 117 snprintf((unsigned char *)&buf[16], 16, "%s", 118 &dev->se_sub_dev->t10_wwn.model[0]); 119 snprintf((unsigned char *)&buf[32], 4, "%s", 120 &dev->se_sub_dev->t10_wwn.revision[0]); 121 buf[4] = 31; /* Set additional length to 31 */ 122 123out: 124 transport_kunmap_first_data_page(cmd); 125 return 0; 126} 127 128/* unit serial number */ 129static int 130target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) 131{ 132 struct se_device *dev = cmd->se_dev; 133 u16 len = 0; 134 135 if (dev->se_sub_dev->su_dev_flags & 136 SDF_EMULATED_VPD_UNIT_SERIAL) { 137 u32 unit_serial_len; 138 139 unit_serial_len = 140 strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]); 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((unsigned char *)&buf[4], "%s", 150 &dev->se_sub_dev->t10_wwn.unit_serial[0]); 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((unsigned char *)&buf[off+12], 281 "%s:%s", prod, 282 &dev->se_sub_dev->t10_wwn.unit_serial[0]); 283 } 284 buf[off] = 0x2; /* ASCII */ 285 buf[off+1] = 0x1; /* T10 Vendor ID */ 286 buf[off+2] = 0x0; 287 memcpy((unsigned char *)&buf[off+4], "LIO-ORG", 8); 288 /* Extra Byte for NULL Terminator */ 289 id_len++; 290 /* Identifier Length */ 291 buf[off+3] = id_len; 292 /* Header size for Designation descriptor */ 293 len += (id_len + 4); 294 off += (id_len + 4); 295 /* 296 * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD 297 */ 298check_port: 299 port = lun->lun_sep; 300 if (port) { 301 struct t10_alua_lu_gp *lu_gp; 302 u32 padding, scsi_name_len; 303 u16 lu_gp_id = 0; 304 u16 tg_pt_gp_id = 0; 305 u16 tpgt; 306 307 tpg = port->sep_tpg; 308 /* 309 * Relative target port identifer, see spc4r17 310 * section 7.7.3.7 311 * 312 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 313 * section 7.5.1 Table 362 314 */ 315 if (((len + 4) + 8) > cmd->data_length) { 316 len += 8; 317 goto check_tpgi; 318 } 319 buf[off] = 320 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); 321 buf[off++] |= 0x1; /* CODE SET == Binary */ 322 buf[off] = 0x80; /* Set PIV=1 */ 323 /* Set ASSOCIATION == target port: 01b */ 324 buf[off] |= 0x10; 325 /* DESIGNATOR TYPE == Relative target port identifer */ 326 buf[off++] |= 0x4; 327 off++; /* Skip over Reserved */ 328 buf[off++] = 4; /* DESIGNATOR LENGTH */ 329 /* Skip over Obsolete field in RTPI payload 330 * in Table 472 */ 331 off += 2; 332 buf[off++] = ((port->sep_rtpi >> 8) & 0xff); 333 buf[off++] = (port->sep_rtpi & 0xff); 334 len += 8; /* Header size + Designation descriptor */ 335 /* 336 * Target port group identifier, see spc4r17 337 * section 7.7.3.8 338 * 339 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 340 * section 7.5.1 Table 362 341 */ 342check_tpgi: 343 if (dev->se_sub_dev->t10_alua.alua_type != 344 SPC3_ALUA_EMULATED) 345 goto check_scsi_name; 346 347 if (((len + 4) + 8) > cmd->data_length) { 348 len += 8; 349 goto check_lu_gp; 350 } 351 tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; 352 if (!tg_pt_gp_mem) 353 goto check_lu_gp; 354 355 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 356 tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; 357 if (!tg_pt_gp) { 358 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 359 goto check_lu_gp; 360 } 361 tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; 362 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 363 364 buf[off] = 365 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); 366 buf[off++] |= 0x1; /* CODE SET == Binary */ 367 buf[off] = 0x80; /* Set PIV=1 */ 368 /* Set ASSOCIATION == target port: 01b */ 369 buf[off] |= 0x10; 370 /* DESIGNATOR TYPE == Target port group identifier */ 371 buf[off++] |= 0x5; 372 off++; /* Skip over Reserved */ 373 buf[off++] = 4; /* DESIGNATOR LENGTH */ 374 off += 2; /* Skip over Reserved Field */ 375 buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); 376 buf[off++] = (tg_pt_gp_id & 0xff); 377 len += 8; /* Header size + Designation descriptor */ 378 /* 379 * Logical Unit Group identifier, see spc4r17 380 * section 7.7.3.8 381 */ 382check_lu_gp: 383 if (((len + 4) + 8) > cmd->data_length) { 384 len += 8; 385 goto check_scsi_name; 386 } 387 lu_gp_mem = dev->dev_alua_lu_gp_mem; 388 if (!lu_gp_mem) 389 goto check_scsi_name; 390 391 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 392 lu_gp = lu_gp_mem->lu_gp; 393 if (!lu_gp) { 394 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 395 goto check_scsi_name; 396 } 397 lu_gp_id = lu_gp->lu_gp_id; 398 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 399 400 buf[off++] |= 0x1; /* CODE SET == Binary */ 401 /* DESIGNATOR TYPE == Logical Unit Group identifier */ 402 buf[off++] |= 0x6; 403 off++; /* Skip over Reserved */ 404 buf[off++] = 4; /* DESIGNATOR LENGTH */ 405 off += 2; /* Skip over Reserved Field */ 406 buf[off++] = ((lu_gp_id >> 8) & 0xff); 407 buf[off++] = (lu_gp_id & 0xff); 408 len += 8; /* Header size + Designation descriptor */ 409 /* 410 * SCSI name string designator, see spc4r17 411 * section 7.7.3.11 412 * 413 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 414 * section 7.5.1 Table 362 415 */ 416check_scsi_name: 417 scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg)); 418 /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */ 419 scsi_name_len += 10; 420 /* Check for 4-byte padding */ 421 padding = ((-scsi_name_len) & 3); 422 if (padding != 0) 423 scsi_name_len += padding; 424 /* Header size + Designation descriptor */ 425 scsi_name_len += 4; 426 427 if (((len + 4) + scsi_name_len) > cmd->data_length) { 428 len += scsi_name_len; 429 goto set_len; 430 } 431 buf[off] = 432 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); 433 buf[off++] |= 0x3; /* CODE SET == UTF-8 */ 434 buf[off] = 0x80; /* Set PIV=1 */ 435 /* Set ASSOCIATION == target port: 01b */ 436 buf[off] |= 0x10; 437 /* DESIGNATOR TYPE == SCSI name string */ 438 buf[off++] |= 0x8; 439 off += 2; /* Skip over Reserved and length */ 440 /* 441 * SCSI name string identifer containing, $FABRIC_MOD 442 * dependent information. For LIO-Target and iSCSI 443 * Target Port, this means "<iSCSI name>,t,0x<TPGT> in 444 * UTF-8 encoding. 445 */ 446 tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); 447 scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", 448 tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); 449 scsi_name_len += 1 /* Include NULL terminator */; 450 /* 451 * The null-terminated, null-padded (see 4.4.2) SCSI 452 * NAME STRING field contains a UTF-8 format string. 453 * The number of bytes in the SCSI NAME STRING field 454 * (i.e., the value in the DESIGNATOR LENGTH field) 455 * shall be no larger than 256 and shall be a multiple 456 * of four. 457 */ 458 if (padding) 459 scsi_name_len += padding; 460 461 buf[off-1] = scsi_name_len; 462 off += scsi_name_len; 463 /* Header size + Designation descriptor */ 464 len += (scsi_name_len + 4); 465 } 466set_len: 467 buf[2] = ((len >> 8) & 0xff); 468 buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ 469 return 0; 470} 471 472/* Extended INQUIRY Data VPD Page */ 473static int 474target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) 475{ 476 if (cmd->data_length < 60) 477 return 0; 478 479 buf[2] = 0x3c; 480 /* Set HEADSUP, ORDSUP, SIMPSUP */ 481 buf[5] = 0x07; 482 483 /* If WriteCache emulation is enabled, set V_SUP */ 484 if (cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) 485 buf[6] = 0x01; 486 return 0; 487} 488 489/* Block Limits VPD page */ 490static int 491target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) 492{ 493 struct se_device *dev = cmd->se_dev; 494 int have_tp = 0; 495 496 /* 497 * Following sbc3r22 section 6.5.3 Block Limits VPD page, when 498 * emulate_tpu=1 or emulate_tpws=1 we will be expect a 499 * different page length for Thin Provisioning. 500 */ 501 if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) 502 have_tp = 1; 503 504 if (cmd->data_length < (0x10 + 4)) { 505 pr_debug("Received data_length: %u" 506 " too small for EVPD 0xb0\n", 507 cmd->data_length); 508 return -EINVAL; 509 } 510 511 if (have_tp && cmd->data_length < (0x3c + 4)) { 512 pr_debug("Received data_length: %u" 513 " too small for TPE=1 EVPD 0xb0\n", 514 cmd->data_length); 515 have_tp = 0; 516 } 517 518 buf[0] = dev->transport->get_device_type(dev); 519 buf[3] = have_tp ? 0x3c : 0x10; 520 521 /* Set WSNZ to 1 */ 522 buf[4] = 0x01; 523 524 /* 525 * Set OPTIMAL TRANSFER LENGTH GRANULARITY 526 */ 527 put_unaligned_be16(1, &buf[6]); 528 529 /* 530 * Set MAXIMUM TRANSFER LENGTH 531 */ 532 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_sectors, &buf[8]); 533 534 /* 535 * Set OPTIMAL TRANSFER LENGTH 536 */ 537 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.optimal_sectors, &buf[12]); 538 539 /* 540 * Exit now if we don't support TP or the initiator sent a too 541 * short buffer. 542 */ 543 if (!have_tp || cmd->data_length < (0x3c + 4)) 544 return 0; 545 546 /* 547 * Set MAXIMUM UNMAP LBA COUNT 548 */ 549 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count, &buf[20]); 550 551 /* 552 * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT 553 */ 554 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count, 555 &buf[24]); 556 557 /* 558 * Set OPTIMAL UNMAP GRANULARITY 559 */ 560 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity, &buf[28]); 561 562 /* 563 * UNMAP GRANULARITY ALIGNMENT 564 */ 565 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment, 566 &buf[32]); 567 if (dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment != 0) 568 buf[32] |= 0x80; /* Set the UGAVALID bit */ 569 570 return 0; 571} 572 573/* Block Device Characteristics VPD page */ 574static int 575target_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) 576{ 577 struct se_device *dev = cmd->se_dev; 578 579 buf[0] = dev->transport->get_device_type(dev); 580 buf[3] = 0x3c; 581 582 if (cmd->data_length >= 5 && 583 dev->se_sub_dev->se_dev_attrib.is_nonrot) 584 buf[5] = 1; 585 586 return 0; 587} 588 589/* Thin Provisioning VPD */ 590static int 591target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) 592{ 593 struct se_device *dev = cmd->se_dev; 594 595 /* 596 * From sbc3r22 section 6.5.4 Thin Provisioning VPD page: 597 * 598 * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to 599 * zero, then the page length shall be set to 0004h. If the DP bit 600 * is set to one, then the page length shall be set to the value 601 * defined in table 162. 602 */ 603 buf[0] = dev->transport->get_device_type(dev); 604 605 /* 606 * Set Hardcoded length mentioned above for DP=0 607 */ 608 put_unaligned_be16(0x0004, &buf[2]); 609 610 /* 611 * The THRESHOLD EXPONENT field indicates the threshold set size in 612 * LBAs as a power of 2 (i.e., the threshold set size is equal to 613 * 2(threshold exponent)). 614 * 615 * Note that this is currently set to 0x00 as mkp says it will be 616 * changing again. We can enable this once it has settled in T10 617 * and is actually used by Linux/SCSI ML code. 618 */ 619 buf[4] = 0x00; 620 621 /* 622 * A TPU bit set to one indicates that the device server supports 623 * the UNMAP command (see 5.25). A TPU bit set to zero indicates 624 * that the device server does not support the UNMAP command. 625 */ 626 if (dev->se_sub_dev->se_dev_attrib.emulate_tpu != 0) 627 buf[5] = 0x80; 628 629 /* 630 * A TPWS bit set to one indicates that the device server supports 631 * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. 632 * A TPWS bit set to zero indicates that the device server does not 633 * support the use of the WRITE SAME (16) command to unmap LBAs. 634 */ 635 if (dev->se_sub_dev->se_dev_attrib.emulate_tpws != 0) 636 buf[5] |= 0x40; 637 638 return 0; 639} 640 641static int 642target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); 643 644static struct { 645 uint8_t page; 646 int (*emulate)(struct se_cmd *, unsigned char *); 647} evpd_handlers[] = { 648 { .page = 0x00, .emulate = target_emulate_evpd_00 }, 649 { .page = 0x80, .emulate = target_emulate_evpd_80 }, 650 { .page = 0x83, .emulate = target_emulate_evpd_83 }, 651 { .page = 0x86, .emulate = target_emulate_evpd_86 }, 652 { .page = 0xb0, .emulate = target_emulate_evpd_b0 }, 653 { .page = 0xb1, .emulate = target_emulate_evpd_b1 }, 654 { .page = 0xb2, .emulate = target_emulate_evpd_b2 }, 655}; 656 657/* supported vital product data pages */ 658static int 659target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) 660{ 661 int p; 662 663 if (cmd->data_length < 8) 664 return 0; 665 /* 666 * Only report the INQUIRY EVPD=1 pages after a valid NAA 667 * Registered Extended LUN WWN has been set via ConfigFS 668 * during device creation/restart. 669 */ 670 if (cmd->se_dev->se_sub_dev->su_dev_flags & 671 SDF_EMULATED_VPD_UNIT_SERIAL) { 672 buf[3] = ARRAY_SIZE(evpd_handlers); 673 for (p = 0; p < min_t(int, ARRAY_SIZE(evpd_handlers), 674 cmd->data_length - 4); ++p) 675 buf[p + 4] = evpd_handlers[p].page; 676 } 677 678 return 0; 679} 680 681static int 682target_emulate_inquiry(struct se_cmd *cmd) 683{ 684 struct se_device *dev = cmd->se_dev; 685 unsigned char *buf; 686 unsigned char *cdb = cmd->t_task_cdb; 687 int p, ret; 688 689 if (!(cdb[1] & 0x1)) 690 return target_emulate_inquiry_std(cmd); 691 692 /* 693 * Make sure we at least have 4 bytes of INQUIRY response 694 * payload for 0x00 going back for EVPD=1. Note that 0x80 695 * and 0x83 will check for enough payload data length and 696 * jump to set_len: label when there is not enough inquiry EVPD 697 * payload length left for the next outgoing EVPD metadata 698 */ 699 if (cmd->data_length < 4) { 700 pr_err("SCSI Inquiry payload length: %u" 701 " too small for EVPD=1\n", cmd->data_length); 702 return -EINVAL; 703 } 704 705 buf = transport_kmap_first_data_page(cmd); 706 707 buf[0] = dev->transport->get_device_type(dev); 708 709 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) 710 if (cdb[2] == evpd_handlers[p].page) { 711 buf[1] = cdb[2]; 712 ret = evpd_handlers[p].emulate(cmd, buf); 713 transport_kunmap_first_data_page(cmd); 714 return ret; 715 } 716 717 transport_kunmap_first_data_page(cmd); 718 pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); 719 return -EINVAL; 720} 721 722static int 723target_emulate_readcapacity(struct se_cmd *cmd) 724{ 725 struct se_device *dev = cmd->se_dev; 726 unsigned char *buf; 727 unsigned long long blocks_long = dev->transport->get_blocks(dev); 728 u32 blocks; 729 730 if (blocks_long >= 0x00000000ffffffff) 731 blocks = 0xffffffff; 732 else 733 blocks = (u32)blocks_long; 734 735 buf = transport_kmap_first_data_page(cmd); 736 737 buf[0] = (blocks >> 24) & 0xff; 738 buf[1] = (blocks >> 16) & 0xff; 739 buf[2] = (blocks >> 8) & 0xff; 740 buf[3] = blocks & 0xff; 741 buf[4] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; 742 buf[5] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; 743 buf[6] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; 744 buf[7] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; 745 /* 746 * Set max 32-bit blocks to signal SERVICE ACTION READ_CAPACITY_16 747 */ 748 if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) 749 put_unaligned_be32(0xFFFFFFFF, &buf[0]); 750 751 transport_kunmap_first_data_page(cmd); 752 753 return 0; 754} 755 756static int 757target_emulate_readcapacity_16(struct se_cmd *cmd) 758{ 759 struct se_device *dev = cmd->se_dev; 760 unsigned char *buf; 761 unsigned long long blocks = dev->transport->get_blocks(dev); 762 763 buf = transport_kmap_first_data_page(cmd); 764 765 buf[0] = (blocks >> 56) & 0xff; 766 buf[1] = (blocks >> 48) & 0xff; 767 buf[2] = (blocks >> 40) & 0xff; 768 buf[3] = (blocks >> 32) & 0xff; 769 buf[4] = (blocks >> 24) & 0xff; 770 buf[5] = (blocks >> 16) & 0xff; 771 buf[6] = (blocks >> 8) & 0xff; 772 buf[7] = blocks & 0xff; 773 buf[8] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; 774 buf[9] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; 775 buf[10] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; 776 buf[11] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; 777 /* 778 * Set Thin Provisioning Enable bit following sbc3r22 in section 779 * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled. 780 */ 781 if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) 782 buf[14] = 0x80; 783 784 transport_kunmap_first_data_page(cmd); 785 786 return 0; 787} 788 789static int 790target_modesense_rwrecovery(unsigned char *p) 791{ 792 p[0] = 0x01; 793 p[1] = 0x0a; 794 795 return 12; 796} 797 798static int 799target_modesense_control(struct se_device *dev, unsigned char *p) 800{ 801 p[0] = 0x0a; 802 p[1] = 0x0a; 803 p[2] = 2; 804 /* 805 * From spc4r23, 7.4.7 Control mode page 806 * 807 * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies 808 * restrictions on the algorithm used for reordering commands 809 * having the SIMPLE task attribute (see SAM-4). 810 * 811 * Table 368 -- QUEUE ALGORITHM MODIFIER field 812 * Code Description 813 * 0h Restricted reordering 814 * 1h Unrestricted reordering allowed 815 * 2h to 7h Reserved 816 * 8h to Fh Vendor specific 817 * 818 * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that 819 * the device server shall order the processing sequence of commands 820 * having the SIMPLE task attribute such that data integrity is maintained 821 * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol 822 * requests is halted at any time, the final value of all data observable 823 * on the medium shall be the same as if all the commands had been processed 824 * with the ORDERED task attribute). 825 * 826 * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the 827 * device server may reorder the processing sequence of commands having the 828 * SIMPLE task attribute in any manner. Any data integrity exposures related to 829 * command sequence order shall be explicitly handled by the application client 830 * through the selection of appropriate ommands and task attributes. 831 */ 832 p[3] = (dev->se_sub_dev->se_dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; 833 /* 834 * From spc4r17, section 7.4.6 Control mode Page 835 * 836 * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b 837 * 838 * 00b: The logical unit shall clear any unit attention condition 839 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION 840 * status and shall not establish a unit attention condition when a com- 841 * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT 842 * status. 843 * 844 * 10b: The logical unit shall not clear any unit attention condition 845 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION 846 * status and shall not establish a unit attention condition when 847 * a command is completed with BUSY, TASK SET FULL, or RESERVATION 848 * CONFLICT status. 849 * 850 * 11b a The logical unit shall not clear any unit attention condition 851 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION 852 * status and shall establish a unit attention condition for the 853 * initiator port associated with the I_T nexus on which the BUSY, 854 * TASK SET FULL, or RESERVATION CONFLICT status is being returned. 855 * Depending on the status, the additional sense code shall be set to 856 * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS 857 * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE 858 * command, a unit attention condition shall be established only once 859 * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless 860 * to the number of commands completed with one of those status codes. 861 */ 862 p[4] = (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : 863 (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; 864 /* 865 * From spc4r17, section 7.4.6 Control mode Page 866 * 867 * Task Aborted Status (TAS) bit set to zero. 868 * 869 * A task aborted status (TAS) bit set to zero specifies that aborted 870 * tasks shall be terminated by the device server without any response 871 * to the application client. A TAS bit set to one specifies that tasks 872 * aborted by the actions of an I_T nexus other than the I_T nexus on 873 * which the command was received shall be completed with TASK ABORTED 874 * status (see SAM-4). 875 */ 876 p[5] = (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? 0x40 : 0x00; 877 p[8] = 0xff; 878 p[9] = 0xff; 879 p[11] = 30; 880 881 return 12; 882} 883 884static int 885target_modesense_caching(struct se_device *dev, unsigned char *p) 886{ 887 p[0] = 0x08; 888 p[1] = 0x12; 889 if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) 890 p[2] = 0x04; /* Write Cache Enable */ 891 p[12] = 0x20; /* Disabled Read Ahead */ 892 893 return 20; 894} 895 896static void 897target_modesense_write_protect(unsigned char *buf, int type) 898{ 899 /* 900 * I believe that the WP bit (bit 7) in the mode header is the same for 901 * all device types.. 902 */ 903 switch (type) { 904 case TYPE_DISK: 905 case TYPE_TAPE: 906 default: 907 buf[0] |= 0x80; /* WP bit */ 908 break; 909 } 910} 911 912static void 913target_modesense_dpofua(unsigned char *buf, int type) 914{ 915 switch (type) { 916 case TYPE_DISK: 917 buf[0] |= 0x10; /* DPOFUA bit */ 918 break; 919 default: 920 break; 921 } 922} 923 924static int 925target_emulate_modesense(struct se_cmd *cmd, int ten) 926{ 927 struct se_device *dev = cmd->se_dev; 928 char *cdb = cmd->t_task_cdb; 929 unsigned char *rbuf; 930 int type = dev->transport->get_device_type(dev); 931 int offset = (ten) ? 8 : 4; 932 int length = 0; 933 unsigned char buf[SE_MODE_PAGE_BUF]; 934 935 memset(buf, 0, SE_MODE_PAGE_BUF); 936 937 switch (cdb[2] & 0x3f) { 938 case 0x01: 939 length = target_modesense_rwrecovery(&buf[offset]); 940 break; 941 case 0x08: 942 length = target_modesense_caching(dev, &buf[offset]); 943 break; 944 case 0x0a: 945 length = target_modesense_control(dev, &buf[offset]); 946 break; 947 case 0x3f: 948 length = target_modesense_rwrecovery(&buf[offset]); 949 length += target_modesense_caching(dev, &buf[offset+length]); 950 length += target_modesense_control(dev, &buf[offset+length]); 951 break; 952 default: 953 pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", 954 cdb[2] & 0x3f, cdb[3]); 955 return PYX_TRANSPORT_UNKNOWN_MODE_PAGE; 956 } 957 offset += length; 958 959 if (ten) { 960 offset -= 2; 961 buf[0] = (offset >> 8) & 0xff; 962 buf[1] = offset & 0xff; 963 964 if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || 965 (cmd->se_deve && 966 (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) 967 target_modesense_write_protect(&buf[3], type); 968 969 if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && 970 (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) 971 target_modesense_dpofua(&buf[3], type); 972 973 if ((offset + 2) > cmd->data_length) 974 offset = cmd->data_length; 975 976 } else { 977 offset -= 1; 978 buf[0] = offset & 0xff; 979 980 if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || 981 (cmd->se_deve && 982 (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) 983 target_modesense_write_protect(&buf[2], type); 984 985 if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && 986 (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) 987 target_modesense_dpofua(&buf[2], type); 988 989 if ((offset + 1) > cmd->data_length) 990 offset = cmd->data_length; 991 } 992 993 rbuf = transport_kmap_first_data_page(cmd); 994 memcpy(rbuf, buf, offset); 995 transport_kunmap_first_data_page(cmd); 996 997 return 0; 998} 999 1000static int 1001target_emulate_request_sense(struct se_cmd *cmd) 1002{ 1003 unsigned char *cdb = cmd->t_task_cdb; 1004 unsigned char *buf; 1005 u8 ua_asc = 0, ua_ascq = 0; 1006 int err = 0; 1007 1008 if (cdb[1] & 0x01) { 1009 pr_err("REQUEST_SENSE description emulation not" 1010 " supported\n"); 1011 return PYX_TRANSPORT_INVALID_CDB_FIELD; 1012 } 1013 1014 buf = transport_kmap_first_data_page(cmd); 1015 1016 if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) { 1017 /* 1018 * CURRENT ERROR, UNIT ATTENTION 1019 */ 1020 buf[0] = 0x70; 1021 buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; 1022 /* 1023 * Make sure request data length is enough for additional 1024 * sense data. 1025 */ 1026 if (cmd->data_length <= 18) { 1027 buf[7] = 0x00; 1028 err = -EINVAL; 1029 goto end; 1030 } 1031 /* 1032 * The Additional Sense Code (ASC) from the UNIT ATTENTION 1033 */ 1034 buf[SPC_ASC_KEY_OFFSET] = ua_asc; 1035 buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; 1036 buf[7] = 0x0A; 1037 } else { 1038 /* 1039 * CURRENT ERROR, NO SENSE 1040 */ 1041 buf[0] = 0x70; 1042 buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; 1043 /* 1044 * Make sure request data length is enough for additional 1045 * sense data. 1046 */ 1047 if (cmd->data_length <= 18) { 1048 buf[7] = 0x00; 1049 err = -EINVAL; 1050 goto end; 1051 } 1052 /* 1053 * NO ADDITIONAL SENSE INFORMATION 1054 */ 1055 buf[SPC_ASC_KEY_OFFSET] = 0x00; 1056 buf[7] = 0x0A; 1057 } 1058 1059end: 1060 transport_kunmap_first_data_page(cmd); 1061 1062 return 0; 1063} 1064 1065/* 1066 * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. 1067 * Note this is not used for TCM/pSCSI passthrough 1068 */ 1069static int 1070target_emulate_unmap(struct se_task *task) 1071{ 1072 struct se_cmd *cmd = task->task_se_cmd; 1073 struct se_device *dev = cmd->se_dev; 1074 unsigned char *buf, *ptr = NULL; 1075 unsigned char *cdb = &cmd->t_task_cdb[0]; 1076 sector_t lba; 1077 unsigned int size = cmd->data_length, range; 1078 int ret = 0, offset; 1079 unsigned short dl, bd_dl; 1080 1081 /* First UNMAP block descriptor starts at 8 byte offset */ 1082 offset = 8; 1083 size -= 8; 1084 dl = get_unaligned_be16(&cdb[0]); 1085 bd_dl = get_unaligned_be16(&cdb[2]); 1086 1087 buf = transport_kmap_first_data_page(cmd); 1088 1089 ptr = &buf[offset]; 1090 pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu" 1091 " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); 1092 1093 while (size) { 1094 lba = get_unaligned_be64(&ptr[0]); 1095 range = get_unaligned_be32(&ptr[8]); 1096 pr_debug("UNMAP: Using lba: %llu and range: %u\n", 1097 (unsigned long long)lba, range); 1098 1099 ret = dev->transport->do_discard(dev, lba, range); 1100 if (ret < 0) { 1101 pr_err("blkdev_issue_discard() failed: %d\n", 1102 ret); 1103 goto err; 1104 } 1105 1106 ptr += 16; 1107 size -= 16; 1108 } 1109 1110err: 1111 transport_kunmap_first_data_page(cmd); 1112 1113 return ret; 1114} 1115 1116/* 1117 * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. 1118 * Note this is not used for TCM/pSCSI passthrough 1119 */ 1120static int 1121target_emulate_write_same(struct se_task *task, u32 num_blocks) 1122{ 1123 struct se_cmd *cmd = task->task_se_cmd; 1124 struct se_device *dev = cmd->se_dev; 1125 sector_t range; 1126 sector_t lba = cmd->t_task_lba; 1127 int ret; 1128 /* 1129 * Use the explicit range when non zero is supplied, otherwise calculate 1130 * the remaining range based on ->get_blocks() - starting LBA. 1131 */ 1132 if (num_blocks != 0) 1133 range = num_blocks; 1134 else 1135 range = (dev->transport->get_blocks(dev) - lba); 1136 1137 pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n", 1138 (unsigned long long)lba, (unsigned long long)range); 1139 1140 ret = dev->transport->do_discard(dev, lba, range); 1141 if (ret < 0) { 1142 pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n"); 1143 return ret; 1144 } 1145 1146 return 0; 1147} 1148 1149int 1150transport_emulate_control_cdb(struct se_task *task) 1151{ 1152 struct se_cmd *cmd = task->task_se_cmd; 1153 struct se_device *dev = cmd->se_dev; 1154 unsigned short service_action; 1155 int ret = 0; 1156 1157 switch (cmd->t_task_cdb[0]) { 1158 case INQUIRY: 1159 ret = target_emulate_inquiry(cmd); 1160 break; 1161 case READ_CAPACITY: 1162 ret = target_emulate_readcapacity(cmd); 1163 break; 1164 case MODE_SENSE: 1165 ret = target_emulate_modesense(cmd, 0); 1166 break; 1167 case MODE_SENSE_10: 1168 ret = target_emulate_modesense(cmd, 1); 1169 break; 1170 case SERVICE_ACTION_IN: 1171 switch (cmd->t_task_cdb[1] & 0x1f) { 1172 case SAI_READ_CAPACITY_16: 1173 ret = target_emulate_readcapacity_16(cmd); 1174 break; 1175 default: 1176 pr_err("Unsupported SA: 0x%02x\n", 1177 cmd->t_task_cdb[1] & 0x1f); 1178 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; 1179 } 1180 break; 1181 case REQUEST_SENSE: 1182 ret = target_emulate_request_sense(cmd); 1183 break; 1184 case UNMAP: 1185 if (!dev->transport->do_discard) { 1186 pr_err("UNMAP emulation not supported for: %s\n", 1187 dev->transport->name); 1188 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; 1189 } 1190 ret = target_emulate_unmap(task); 1191 break; 1192 case WRITE_SAME: 1193 if (!dev->transport->do_discard) { 1194 pr_err("WRITE_SAME emulation not supported" 1195 " for: %s\n", dev->transport->name); 1196 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; 1197 } 1198 ret = target_emulate_write_same(task, 1199 get_unaligned_be16(&cmd->t_task_cdb[7])); 1200 break; 1201 case WRITE_SAME_16: 1202 if (!dev->transport->do_discard) { 1203 pr_err("WRITE_SAME_16 emulation not supported" 1204 " for: %s\n", dev->transport->name); 1205 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; 1206 } 1207 ret = target_emulate_write_same(task, 1208 get_unaligned_be32(&cmd->t_task_cdb[10])); 1209 break; 1210 case VARIABLE_LENGTH_CMD: 1211 service_action = 1212 get_unaligned_be16(&cmd->t_task_cdb[8]); 1213 switch (service_action) { 1214 case WRITE_SAME_32: 1215 if (!dev->transport->do_discard) { 1216 pr_err("WRITE_SAME_32 SA emulation not" 1217 " supported for: %s\n", 1218 dev->transport->name); 1219 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; 1220 } 1221 ret = target_emulate_write_same(task, 1222 get_unaligned_be32(&cmd->t_task_cdb[28])); 1223 break; 1224 default: 1225 pr_err("Unsupported VARIABLE_LENGTH_CMD SA:" 1226 " 0x%02x\n", service_action); 1227 break; 1228 } 1229 break; 1230 case SYNCHRONIZE_CACHE: 1231 case 0x91: /* SYNCHRONIZE_CACHE_16: */ 1232 if (!dev->transport->do_sync_cache) { 1233 pr_err("SYNCHRONIZE_CACHE emulation not supported" 1234 " for: %s\n", dev->transport->name); 1235 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; 1236 } 1237 dev->transport->do_sync_cache(task); 1238 break; 1239 case ALLOW_MEDIUM_REMOVAL: 1240 case ERASE: 1241 case REZERO_UNIT: 1242 case SEEK_10: 1243 case SPACE: 1244 case START_STOP: 1245 case TEST_UNIT_READY: 1246 case VERIFY: 1247 case WRITE_FILEMARKS: 1248 break; 1249 default: 1250 pr_err("Unsupported SCSI Opcode: 0x%02x for %s\n", 1251 cmd->t_task_cdb[0], dev->transport->name); 1252 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; 1253 } 1254 1255 if (ret < 0) 1256 return ret; 1257 /* 1258 * Handle the successful completion here unless a caller 1259 * has explictly requested an asychronous completion. 1260 */ 1261 if (!(cmd->se_cmd_flags & SCF_EMULATE_CDB_ASYNC)) { 1262 task->task_scsi_status = GOOD; 1263 transport_complete_task(task, 1); 1264 } 1265 1266 return PYX_TRANSPORT_SENT_TO_TRANSPORT; 1267} 1268 1269/* 1270 * Write a CDB into @cdb that is based on the one the intiator sent us, 1271 * but updated to only cover the sectors that the current task handles. 1272 */ 1273void target_get_task_cdb(struct se_task *task, unsigned char *cdb) 1274{ 1275 struct se_cmd *cmd = task->task_se_cmd; 1276 1277 memcpy(cdb, cmd->t_task_cdb, scsi_command_size(cmd->t_task_cdb)); 1278 if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) { 1279 cmd->transport_split_cdb(task->task_lba, task->task_sectors, 1280 cdb); 1281 } 1282} 1283EXPORT_SYMBOL(target_get_task_cdb); 1284