target_core_cdb.c revision 6ed5a557905f1c4e9ca5f8a6d607303a12d097e1
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 36static void 37target_fill_alua_data(struct se_port *port, unsigned char *buf) 38{ 39 struct t10_alua_tg_pt_gp *tg_pt_gp; 40 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; 41 42 /* 43 * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS. 44 */ 45 buf[5] = 0x80; 46 47 /* 48 * Set TPGS field for explict and/or implict ALUA access type 49 * and opteration. 50 * 51 * See spc4r17 section 6.4.2 Table 135 52 */ 53 if (!port) 54 return; 55 tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; 56 if (!tg_pt_gp_mem) 57 return; 58 59 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 60 tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; 61 if (tg_pt_gp) 62 buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; 63 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 64} 65 66static int 67target_emulate_inquiry_std(struct se_cmd *cmd) 68{ 69 struct se_lun *lun = cmd->se_lun; 70 struct se_device *dev = cmd->se_dev; 71 struct se_portal_group *tpg = lun->lun_sep->sep_tpg; 72 unsigned char *buf; 73 74 /* 75 * Make sure we at least have 6 bytes of INQUIRY response 76 * payload going back for EVPD=0 77 */ 78 if (cmd->data_length < 6) { 79 pr_err("SCSI Inquiry payload length: %u" 80 " too small for EVPD=0\n", cmd->data_length); 81 return -EINVAL; 82 } 83 84 buf = transport_kmap_first_data_page(cmd); 85 86 if (dev == tpg->tpg_virt_lun0.lun_se_dev) { 87 buf[0] = 0x3f; /* Not connected */ 88 } else { 89 buf[0] = dev->transport->get_device_type(dev); 90 if (buf[0] == TYPE_TAPE) 91 buf[1] = 0x80; 92 } 93 buf[2] = dev->transport->get_device_rev(dev); 94 95 /* 96 * Enable SCCS and TPGS fields for Emulated ALUA 97 */ 98 if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) 99 target_fill_alua_data(lun->lun_sep, buf); 100 101 if (cmd->data_length < 8) { 102 buf[4] = 1; /* Set additional length to 1 */ 103 goto out; 104 } 105 106 buf[7] = 0x32; /* Sync=1 and CmdQue=1 */ 107 108 /* 109 * Do not include vendor, product, reversion info in INQUIRY 110 * response payload for cdbs with a small allocation length. 111 */ 112 if (cmd->data_length < 36) { 113 buf[4] = 3; /* Set additional length to 3 */ 114 goto out; 115 } 116 117 snprintf((unsigned char *)&buf[8], 8, "LIO-ORG"); 118 snprintf((unsigned char *)&buf[16], 16, "%s", 119 &dev->se_sub_dev->t10_wwn.model[0]); 120 snprintf((unsigned char *)&buf[32], 4, "%s", 121 &dev->se_sub_dev->t10_wwn.revision[0]); 122 buf[4] = 31; /* Set additional length to 31 */ 123 124out: 125 transport_kunmap_first_data_page(cmd); 126 return 0; 127} 128 129/* unit serial number */ 130static int 131target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) 132{ 133 struct se_device *dev = cmd->se_dev; 134 u16 len = 0; 135 136 if (dev->se_sub_dev->su_dev_flags & 137 SDF_EMULATED_VPD_UNIT_SERIAL) { 138 u32 unit_serial_len; 139 140 unit_serial_len = 141 strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]); 142 unit_serial_len++; /* For NULL Terminator */ 143 144 if (((len + 4) + unit_serial_len) > cmd->data_length) { 145 len += unit_serial_len; 146 buf[2] = ((len >> 8) & 0xff); 147 buf[3] = (len & 0xff); 148 return 0; 149 } 150 len += sprintf((unsigned char *)&buf[4], "%s", 151 &dev->se_sub_dev->t10_wwn.unit_serial[0]); 152 len++; /* Extra Byte for NULL Terminator */ 153 buf[3] = len; 154 } 155 return 0; 156} 157 158static void 159target_parse_naa_6h_vendor_specific(struct se_device *dev, unsigned char *buf) 160{ 161 unsigned char *p = &dev->se_sub_dev->t10_wwn.unit_serial[0]; 162 int cnt; 163 bool next = true; 164 165 /* 166 * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on 167 * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field 168 * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION 169 * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL 170 * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure 171 * per device uniqeness. 172 */ 173 for (cnt = 0; *p && cnt < 13; p++) { 174 int val = hex_to_bin(*p); 175 176 if (val < 0) 177 continue; 178 179 if (next) { 180 next = false; 181 buf[cnt++] |= val; 182 } else { 183 next = true; 184 buf[cnt] = val << 4; 185 } 186 } 187} 188 189/* 190 * Device identification VPD, for a complete list of 191 * DESIGNATOR TYPEs see spc4r17 Table 459. 192 */ 193static int 194target_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) 195{ 196 struct se_device *dev = cmd->se_dev; 197 struct se_lun *lun = cmd->se_lun; 198 struct se_port *port = NULL; 199 struct se_portal_group *tpg = NULL; 200 struct t10_alua_lu_gp_member *lu_gp_mem; 201 struct t10_alua_tg_pt_gp *tg_pt_gp; 202 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; 203 unsigned char *prod = &dev->se_sub_dev->t10_wwn.model[0]; 204 u32 prod_len; 205 u32 unit_serial_len, off = 0; 206 u16 len = 0, id_len; 207 208 off = 4; 209 210 /* 211 * NAA IEEE Registered Extended Assigned designator format, see 212 * spc4r17 section 7.7.3.6.5 213 * 214 * We depend upon a target_core_mod/ConfigFS provided 215 * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial 216 * value in order to return the NAA id. 217 */ 218 if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL)) 219 goto check_t10_vend_desc; 220 221 if (off + 20 > cmd->data_length) 222 goto check_t10_vend_desc; 223 224 /* CODE SET == Binary */ 225 buf[off++] = 0x1; 226 227 /* Set ASSOCIATION == addressed logical unit: 0)b */ 228 buf[off] = 0x00; 229 230 /* Identifier/Designator type == NAA identifier */ 231 buf[off++] |= 0x3; 232 off++; 233 234 /* Identifier/Designator length */ 235 buf[off++] = 0x10; 236 237 /* 238 * Start NAA IEEE Registered Extended Identifier/Designator 239 */ 240 buf[off++] = (0x6 << 4); 241 242 /* 243 * Use OpenFabrics IEEE Company ID: 00 14 05 244 */ 245 buf[off++] = 0x01; 246 buf[off++] = 0x40; 247 buf[off] = (0x5 << 4); 248 249 /* 250 * Return ConfigFS Unit Serial Number information for 251 * VENDOR_SPECIFIC_IDENTIFIER and 252 * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION 253 */ 254 target_parse_naa_6h_vendor_specific(dev, &buf[off]); 255 256 len = 20; 257 off = (len + 4); 258 259check_t10_vend_desc: 260 /* 261 * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 262 */ 263 id_len = 8; /* For Vendor field */ 264 prod_len = 4; /* For VPD Header */ 265 prod_len += 8; /* For Vendor field */ 266 prod_len += strlen(prod); 267 prod_len++; /* For : */ 268 269 if (dev->se_sub_dev->su_dev_flags & 270 SDF_EMULATED_VPD_UNIT_SERIAL) { 271 unit_serial_len = 272 strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]); 273 unit_serial_len++; /* For NULL Terminator */ 274 275 if ((len + (id_len + 4) + 276 (prod_len + unit_serial_len)) > 277 cmd->data_length) { 278 len += (prod_len + unit_serial_len); 279 goto check_port; 280 } 281 id_len += sprintf((unsigned char *)&buf[off+12], 282 "%s:%s", prod, 283 &dev->se_sub_dev->t10_wwn.unit_serial[0]); 284 } 285 buf[off] = 0x2; /* ASCII */ 286 buf[off+1] = 0x1; /* T10 Vendor ID */ 287 buf[off+2] = 0x0; 288 memcpy((unsigned char *)&buf[off+4], "LIO-ORG", 8); 289 /* Extra Byte for NULL Terminator */ 290 id_len++; 291 /* Identifier Length */ 292 buf[off+3] = id_len; 293 /* Header size for Designation descriptor */ 294 len += (id_len + 4); 295 off += (id_len + 4); 296 /* 297 * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD 298 */ 299check_port: 300 port = lun->lun_sep; 301 if (port) { 302 struct t10_alua_lu_gp *lu_gp; 303 u32 padding, scsi_name_len; 304 u16 lu_gp_id = 0; 305 u16 tg_pt_gp_id = 0; 306 u16 tpgt; 307 308 tpg = port->sep_tpg; 309 /* 310 * Relative target port identifer, see spc4r17 311 * section 7.7.3.7 312 * 313 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 314 * section 7.5.1 Table 362 315 */ 316 if (((len + 4) + 8) > cmd->data_length) { 317 len += 8; 318 goto check_tpgi; 319 } 320 buf[off] = 321 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); 322 buf[off++] |= 0x1; /* CODE SET == Binary */ 323 buf[off] = 0x80; /* Set PIV=1 */ 324 /* Set ASSOCIATION == target port: 01b */ 325 buf[off] |= 0x10; 326 /* DESIGNATOR TYPE == Relative target port identifer */ 327 buf[off++] |= 0x4; 328 off++; /* Skip over Reserved */ 329 buf[off++] = 4; /* DESIGNATOR LENGTH */ 330 /* Skip over Obsolete field in RTPI payload 331 * in Table 472 */ 332 off += 2; 333 buf[off++] = ((port->sep_rtpi >> 8) & 0xff); 334 buf[off++] = (port->sep_rtpi & 0xff); 335 len += 8; /* Header size + Designation descriptor */ 336 /* 337 * Target port group identifier, see spc4r17 338 * section 7.7.3.8 339 * 340 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 341 * section 7.5.1 Table 362 342 */ 343check_tpgi: 344 if (dev->se_sub_dev->t10_alua.alua_type != 345 SPC3_ALUA_EMULATED) 346 goto check_scsi_name; 347 348 if (((len + 4) + 8) > cmd->data_length) { 349 len += 8; 350 goto check_lu_gp; 351 } 352 tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; 353 if (!tg_pt_gp_mem) 354 goto check_lu_gp; 355 356 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 357 tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; 358 if (!tg_pt_gp) { 359 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 360 goto check_lu_gp; 361 } 362 tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; 363 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 364 365 buf[off] = 366 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); 367 buf[off++] |= 0x1; /* CODE SET == Binary */ 368 buf[off] = 0x80; /* Set PIV=1 */ 369 /* Set ASSOCIATION == target port: 01b */ 370 buf[off] |= 0x10; 371 /* DESIGNATOR TYPE == Target port group identifier */ 372 buf[off++] |= 0x5; 373 off++; /* Skip over Reserved */ 374 buf[off++] = 4; /* DESIGNATOR LENGTH */ 375 off += 2; /* Skip over Reserved Field */ 376 buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); 377 buf[off++] = (tg_pt_gp_id & 0xff); 378 len += 8; /* Header size + Designation descriptor */ 379 /* 380 * Logical Unit Group identifier, see spc4r17 381 * section 7.7.3.8 382 */ 383check_lu_gp: 384 if (((len + 4) + 8) > cmd->data_length) { 385 len += 8; 386 goto check_scsi_name; 387 } 388 lu_gp_mem = dev->dev_alua_lu_gp_mem; 389 if (!lu_gp_mem) 390 goto check_scsi_name; 391 392 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 393 lu_gp = lu_gp_mem->lu_gp; 394 if (!lu_gp) { 395 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 396 goto check_scsi_name; 397 } 398 lu_gp_id = lu_gp->lu_gp_id; 399 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 400 401 buf[off++] |= 0x1; /* CODE SET == Binary */ 402 /* DESIGNATOR TYPE == Logical Unit Group identifier */ 403 buf[off++] |= 0x6; 404 off++; /* Skip over Reserved */ 405 buf[off++] = 4; /* DESIGNATOR LENGTH */ 406 off += 2; /* Skip over Reserved Field */ 407 buf[off++] = ((lu_gp_id >> 8) & 0xff); 408 buf[off++] = (lu_gp_id & 0xff); 409 len += 8; /* Header size + Designation descriptor */ 410 /* 411 * SCSI name string designator, see spc4r17 412 * section 7.7.3.11 413 * 414 * Get the PROTOCOL IDENTIFIER as defined by spc4r17 415 * section 7.5.1 Table 362 416 */ 417check_scsi_name: 418 scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg)); 419 /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */ 420 scsi_name_len += 10; 421 /* Check for 4-byte padding */ 422 padding = ((-scsi_name_len) & 3); 423 if (padding != 0) 424 scsi_name_len += padding; 425 /* Header size + Designation descriptor */ 426 scsi_name_len += 4; 427 428 if (((len + 4) + scsi_name_len) > cmd->data_length) { 429 len += scsi_name_len; 430 goto set_len; 431 } 432 buf[off] = 433 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); 434 buf[off++] |= 0x3; /* CODE SET == UTF-8 */ 435 buf[off] = 0x80; /* Set PIV=1 */ 436 /* Set ASSOCIATION == target port: 01b */ 437 buf[off] |= 0x10; 438 /* DESIGNATOR TYPE == SCSI name string */ 439 buf[off++] |= 0x8; 440 off += 2; /* Skip over Reserved and length */ 441 /* 442 * SCSI name string identifer containing, $FABRIC_MOD 443 * dependent information. For LIO-Target and iSCSI 444 * Target Port, this means "<iSCSI name>,t,0x<TPGT> in 445 * UTF-8 encoding. 446 */ 447 tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); 448 scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", 449 tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); 450 scsi_name_len += 1 /* Include NULL terminator */; 451 /* 452 * The null-terminated, null-padded (see 4.4.2) SCSI 453 * NAME STRING field contains a UTF-8 format string. 454 * The number of bytes in the SCSI NAME STRING field 455 * (i.e., the value in the DESIGNATOR LENGTH field) 456 * shall be no larger than 256 and shall be a multiple 457 * of four. 458 */ 459 if (padding) 460 scsi_name_len += padding; 461 462 buf[off-1] = scsi_name_len; 463 off += scsi_name_len; 464 /* Header size + Designation descriptor */ 465 len += (scsi_name_len + 4); 466 } 467set_len: 468 buf[2] = ((len >> 8) & 0xff); 469 buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ 470 return 0; 471} 472 473/* Extended INQUIRY Data VPD Page */ 474static int 475target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) 476{ 477 if (cmd->data_length < 60) 478 return 0; 479 480 buf[2] = 0x3c; 481 /* Set HEADSUP, ORDSUP, SIMPSUP */ 482 buf[5] = 0x07; 483 484 /* If WriteCache emulation is enabled, set V_SUP */ 485 if (cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) 486 buf[6] = 0x01; 487 return 0; 488} 489 490/* Block Limits VPD page */ 491static int 492target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) 493{ 494 struct se_device *dev = cmd->se_dev; 495 int have_tp = 0; 496 497 /* 498 * Following sbc3r22 section 6.5.3 Block Limits VPD page, when 499 * emulate_tpu=1 or emulate_tpws=1 we will be expect a 500 * different page length for Thin Provisioning. 501 */ 502 if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) 503 have_tp = 1; 504 505 if (cmd->data_length < (0x10 + 4)) { 506 pr_debug("Received data_length: %u" 507 " too small for EVPD 0xb0\n", 508 cmd->data_length); 509 return -EINVAL; 510 } 511 512 if (have_tp && cmd->data_length < (0x3c + 4)) { 513 pr_debug("Received data_length: %u" 514 " too small for TPE=1 EVPD 0xb0\n", 515 cmd->data_length); 516 have_tp = 0; 517 } 518 519 buf[0] = dev->transport->get_device_type(dev); 520 buf[3] = have_tp ? 0x3c : 0x10; 521 522 /* Set WSNZ to 1 */ 523 buf[4] = 0x01; 524 525 /* 526 * Set OPTIMAL TRANSFER LENGTH GRANULARITY 527 */ 528 put_unaligned_be16(1, &buf[6]); 529 530 /* 531 * Set MAXIMUM TRANSFER LENGTH 532 */ 533 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_sectors, &buf[8]); 534 535 /* 536 * Set OPTIMAL TRANSFER LENGTH 537 */ 538 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.optimal_sectors, &buf[12]); 539 540 /* 541 * Exit now if we don't support TP or the initiator sent a too 542 * short buffer. 543 */ 544 if (!have_tp || cmd->data_length < (0x3c + 4)) 545 return 0; 546 547 /* 548 * Set MAXIMUM UNMAP LBA COUNT 549 */ 550 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count, &buf[20]); 551 552 /* 553 * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT 554 */ 555 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count, 556 &buf[24]); 557 558 /* 559 * Set OPTIMAL UNMAP GRANULARITY 560 */ 561 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity, &buf[28]); 562 563 /* 564 * UNMAP GRANULARITY ALIGNMENT 565 */ 566 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment, 567 &buf[32]); 568 if (dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment != 0) 569 buf[32] |= 0x80; /* Set the UGAVALID bit */ 570 571 return 0; 572} 573 574/* Block Device Characteristics VPD page */ 575static int 576target_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) 577{ 578 struct se_device *dev = cmd->se_dev; 579 580 buf[0] = dev->transport->get_device_type(dev); 581 buf[3] = 0x3c; 582 583 if (cmd->data_length >= 5 && 584 dev->se_sub_dev->se_dev_attrib.is_nonrot) 585 buf[5] = 1; 586 587 return 0; 588} 589 590/* Thin Provisioning VPD */ 591static int 592target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) 593{ 594 struct se_device *dev = cmd->se_dev; 595 596 /* 597 * From sbc3r22 section 6.5.4 Thin Provisioning VPD page: 598 * 599 * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to 600 * zero, then the page length shall be set to 0004h. If the DP bit 601 * is set to one, then the page length shall be set to the value 602 * defined in table 162. 603 */ 604 buf[0] = dev->transport->get_device_type(dev); 605 606 /* 607 * Set Hardcoded length mentioned above for DP=0 608 */ 609 put_unaligned_be16(0x0004, &buf[2]); 610 611 /* 612 * The THRESHOLD EXPONENT field indicates the threshold set size in 613 * LBAs as a power of 2 (i.e., the threshold set size is equal to 614 * 2(threshold exponent)). 615 * 616 * Note that this is currently set to 0x00 as mkp says it will be 617 * changing again. We can enable this once it has settled in T10 618 * and is actually used by Linux/SCSI ML code. 619 */ 620 buf[4] = 0x00; 621 622 /* 623 * A TPU bit set to one indicates that the device server supports 624 * the UNMAP command (see 5.25). A TPU bit set to zero indicates 625 * that the device server does not support the UNMAP command. 626 */ 627 if (dev->se_sub_dev->se_dev_attrib.emulate_tpu != 0) 628 buf[5] = 0x80; 629 630 /* 631 * A TPWS bit set to one indicates that the device server supports 632 * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. 633 * A TPWS bit set to zero indicates that the device server does not 634 * support the use of the WRITE SAME (16) command to unmap LBAs. 635 */ 636 if (dev->se_sub_dev->se_dev_attrib.emulate_tpws != 0) 637 buf[5] |= 0x40; 638 639 return 0; 640} 641 642static int 643target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); 644 645static struct { 646 uint8_t page; 647 int (*emulate)(struct se_cmd *, unsigned char *); 648} evpd_handlers[] = { 649 { .page = 0x00, .emulate = target_emulate_evpd_00 }, 650 { .page = 0x80, .emulate = target_emulate_evpd_80 }, 651 { .page = 0x83, .emulate = target_emulate_evpd_83 }, 652 { .page = 0x86, .emulate = target_emulate_evpd_86 }, 653 { .page = 0xb0, .emulate = target_emulate_evpd_b0 }, 654 { .page = 0xb1, .emulate = target_emulate_evpd_b1 }, 655 { .page = 0xb2, .emulate = target_emulate_evpd_b2 }, 656}; 657 658/* supported vital product data pages */ 659static int 660target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) 661{ 662 int p; 663 664 if (cmd->data_length < 8) 665 return 0; 666 /* 667 * Only report the INQUIRY EVPD=1 pages after a valid NAA 668 * Registered Extended LUN WWN has been set via ConfigFS 669 * during device creation/restart. 670 */ 671 if (cmd->se_dev->se_sub_dev->su_dev_flags & 672 SDF_EMULATED_VPD_UNIT_SERIAL) { 673 buf[3] = ARRAY_SIZE(evpd_handlers); 674 for (p = 0; p < min_t(int, ARRAY_SIZE(evpd_handlers), 675 cmd->data_length - 4); ++p) 676 buf[p + 4] = evpd_handlers[p].page; 677 } 678 679 return 0; 680} 681 682static int 683target_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 return target_emulate_inquiry_std(cmd); 693 694 /* 695 * Make sure we at least have 4 bytes of INQUIRY response 696 * payload for 0x00 going back for EVPD=1. Note that 0x80 697 * and 0x83 will check for enough payload data length and 698 * jump to set_len: label when there is not enough inquiry EVPD 699 * payload length left for the next outgoing EVPD metadata 700 */ 701 if (cmd->data_length < 4) { 702 pr_err("SCSI Inquiry payload length: %u" 703 " too small for EVPD=1\n", cmd->data_length); 704 return -EINVAL; 705 } 706 707 buf = transport_kmap_first_data_page(cmd); 708 709 buf[0] = dev->transport->get_device_type(dev); 710 711 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) 712 if (cdb[2] == evpd_handlers[p].page) { 713 buf[1] = cdb[2]; 714 ret = evpd_handlers[p].emulate(cmd, buf); 715 transport_kunmap_first_data_page(cmd); 716 return ret; 717 } 718 719 transport_kunmap_first_data_page(cmd); 720 pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); 721 return -EINVAL; 722} 723 724static int 725target_emulate_readcapacity(struct se_task *task) 726{ 727 struct se_cmd *cmd = task->task_se_cmd; 728 struct se_device *dev = cmd->se_dev; 729 unsigned char *buf; 730 unsigned long long blocks_long = dev->transport->get_blocks(dev); 731 u32 blocks; 732 733 if (blocks_long >= 0x00000000ffffffff) 734 blocks = 0xffffffff; 735 else 736 blocks = (u32)blocks_long; 737 738 buf = transport_kmap_first_data_page(cmd); 739 740 buf[0] = (blocks >> 24) & 0xff; 741 buf[1] = (blocks >> 16) & 0xff; 742 buf[2] = (blocks >> 8) & 0xff; 743 buf[3] = blocks & 0xff; 744 buf[4] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; 745 buf[5] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; 746 buf[6] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; 747 buf[7] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; 748 /* 749 * Set max 32-bit blocks to signal SERVICE ACTION READ_CAPACITY_16 750 */ 751 if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) 752 put_unaligned_be32(0xFFFFFFFF, &buf[0]); 753 754 transport_kunmap_first_data_page(cmd); 755 756 return 0; 757} 758 759static int 760target_emulate_readcapacity_16(struct se_task *task) 761{ 762 struct se_cmd *cmd = task->task_se_cmd; 763 struct se_device *dev = cmd->se_dev; 764 unsigned char *buf; 765 unsigned long long blocks = dev->transport->get_blocks(dev); 766 767 buf = transport_kmap_first_data_page(cmd); 768 769 buf[0] = (blocks >> 56) & 0xff; 770 buf[1] = (blocks >> 48) & 0xff; 771 buf[2] = (blocks >> 40) & 0xff; 772 buf[3] = (blocks >> 32) & 0xff; 773 buf[4] = (blocks >> 24) & 0xff; 774 buf[5] = (blocks >> 16) & 0xff; 775 buf[6] = (blocks >> 8) & 0xff; 776 buf[7] = blocks & 0xff; 777 buf[8] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; 778 buf[9] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; 779 buf[10] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; 780 buf[11] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; 781 /* 782 * Set Thin Provisioning Enable bit following sbc3r22 in section 783 * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled. 784 */ 785 if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) 786 buf[14] = 0x80; 787 788 transport_kunmap_first_data_page(cmd); 789 790 return 0; 791} 792 793static int 794target_modesense_rwrecovery(unsigned char *p) 795{ 796 p[0] = 0x01; 797 p[1] = 0x0a; 798 799 return 12; 800} 801 802static int 803target_modesense_control(struct se_device *dev, unsigned char *p) 804{ 805 p[0] = 0x0a; 806 p[1] = 0x0a; 807 p[2] = 2; 808 /* 809 * From spc4r23, 7.4.7 Control mode page 810 * 811 * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies 812 * restrictions on the algorithm used for reordering commands 813 * having the SIMPLE task attribute (see SAM-4). 814 * 815 * Table 368 -- QUEUE ALGORITHM MODIFIER field 816 * Code Description 817 * 0h Restricted reordering 818 * 1h Unrestricted reordering allowed 819 * 2h to 7h Reserved 820 * 8h to Fh Vendor specific 821 * 822 * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that 823 * the device server shall order the processing sequence of commands 824 * having the SIMPLE task attribute such that data integrity is maintained 825 * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol 826 * requests is halted at any time, the final value of all data observable 827 * on the medium shall be the same as if all the commands had been processed 828 * with the ORDERED task attribute). 829 * 830 * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the 831 * device server may reorder the processing sequence of commands having the 832 * SIMPLE task attribute in any manner. Any data integrity exposures related to 833 * command sequence order shall be explicitly handled by the application client 834 * through the selection of appropriate ommands and task attributes. 835 */ 836 p[3] = (dev->se_sub_dev->se_dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; 837 /* 838 * From spc4r17, section 7.4.6 Control mode Page 839 * 840 * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b 841 * 842 * 00b: The logical unit shall clear any unit attention condition 843 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION 844 * status and shall not establish a unit attention condition when a com- 845 * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT 846 * status. 847 * 848 * 10b: The logical unit shall not clear any unit attention condition 849 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION 850 * status and shall not establish a unit attention condition when 851 * a command is completed with BUSY, TASK SET FULL, or RESERVATION 852 * CONFLICT status. 853 * 854 * 11b a The logical unit shall not clear any unit attention condition 855 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION 856 * status and shall establish a unit attention condition for the 857 * initiator port associated with the I_T nexus on which the BUSY, 858 * TASK SET FULL, or RESERVATION CONFLICT status is being returned. 859 * Depending on the status, the additional sense code shall be set to 860 * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS 861 * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE 862 * command, a unit attention condition shall be established only once 863 * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless 864 * to the number of commands completed with one of those status codes. 865 */ 866 p[4] = (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : 867 (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; 868 /* 869 * From spc4r17, section 7.4.6 Control mode Page 870 * 871 * Task Aborted Status (TAS) bit set to zero. 872 * 873 * A task aborted status (TAS) bit set to zero specifies that aborted 874 * tasks shall be terminated by the device server without any response 875 * to the application client. A TAS bit set to one specifies that tasks 876 * aborted by the actions of an I_T nexus other than the I_T nexus on 877 * which the command was received shall be completed with TASK ABORTED 878 * status (see SAM-4). 879 */ 880 p[5] = (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? 0x40 : 0x00; 881 p[8] = 0xff; 882 p[9] = 0xff; 883 p[11] = 30; 884 885 return 12; 886} 887 888static int 889target_modesense_caching(struct se_device *dev, unsigned char *p) 890{ 891 p[0] = 0x08; 892 p[1] = 0x12; 893 if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) 894 p[2] = 0x04; /* Write Cache Enable */ 895 p[12] = 0x20; /* Disabled Read Ahead */ 896 897 return 20; 898} 899 900static void 901target_modesense_write_protect(unsigned char *buf, int type) 902{ 903 /* 904 * I believe that the WP bit (bit 7) in the mode header is the same for 905 * all device types.. 906 */ 907 switch (type) { 908 case TYPE_DISK: 909 case TYPE_TAPE: 910 default: 911 buf[0] |= 0x80; /* WP bit */ 912 break; 913 } 914} 915 916static void 917target_modesense_dpofua(unsigned char *buf, int type) 918{ 919 switch (type) { 920 case TYPE_DISK: 921 buf[0] |= 0x10; /* DPOFUA bit */ 922 break; 923 default: 924 break; 925 } 926} 927 928static int 929target_emulate_modesense(struct se_task *task) 930{ 931 struct se_cmd *cmd = task->task_se_cmd; 932 struct se_device *dev = cmd->se_dev; 933 char *cdb = cmd->t_task_cdb; 934 unsigned char *rbuf; 935 int type = dev->transport->get_device_type(dev); 936 int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10); 937 int offset = ten ? 8 : 4; 938 int length = 0; 939 unsigned char buf[SE_MODE_PAGE_BUF]; 940 941 memset(buf, 0, SE_MODE_PAGE_BUF); 942 943 switch (cdb[2] & 0x3f) { 944 case 0x01: 945 length = target_modesense_rwrecovery(&buf[offset]); 946 break; 947 case 0x08: 948 length = target_modesense_caching(dev, &buf[offset]); 949 break; 950 case 0x0a: 951 length = target_modesense_control(dev, &buf[offset]); 952 break; 953 case 0x3f: 954 length = target_modesense_rwrecovery(&buf[offset]); 955 length += target_modesense_caching(dev, &buf[offset+length]); 956 length += target_modesense_control(dev, &buf[offset+length]); 957 break; 958 default: 959 pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", 960 cdb[2] & 0x3f, cdb[3]); 961 return PYX_TRANSPORT_UNKNOWN_MODE_PAGE; 962 } 963 offset += length; 964 965 if (ten) { 966 offset -= 2; 967 buf[0] = (offset >> 8) & 0xff; 968 buf[1] = offset & 0xff; 969 970 if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || 971 (cmd->se_deve && 972 (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) 973 target_modesense_write_protect(&buf[3], type); 974 975 if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && 976 (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) 977 target_modesense_dpofua(&buf[3], type); 978 979 if ((offset + 2) > cmd->data_length) 980 offset = cmd->data_length; 981 982 } else { 983 offset -= 1; 984 buf[0] = offset & 0xff; 985 986 if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || 987 (cmd->se_deve && 988 (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) 989 target_modesense_write_protect(&buf[2], type); 990 991 if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && 992 (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) 993 target_modesense_dpofua(&buf[2], type); 994 995 if ((offset + 1) > cmd->data_length) 996 offset = cmd->data_length; 997 } 998 999 rbuf = transport_kmap_first_data_page(cmd); 1000 memcpy(rbuf, buf, offset); 1001 transport_kunmap_first_data_page(cmd); 1002 1003 return 0; 1004} 1005 1006static int 1007target_emulate_request_sense(struct se_task *task) 1008{ 1009 struct se_cmd *cmd = task->task_se_cmd; 1010 unsigned char *cdb = cmd->t_task_cdb; 1011 unsigned char *buf; 1012 u8 ua_asc = 0, ua_ascq = 0; 1013 int err = 0; 1014 1015 if (cdb[1] & 0x01) { 1016 pr_err("REQUEST_SENSE description emulation not" 1017 " supported\n"); 1018 return PYX_TRANSPORT_INVALID_CDB_FIELD; 1019 } 1020 1021 buf = transport_kmap_first_data_page(cmd); 1022 1023 if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) { 1024 /* 1025 * CURRENT ERROR, UNIT ATTENTION 1026 */ 1027 buf[0] = 0x70; 1028 buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; 1029 /* 1030 * Make sure request data length is enough for additional 1031 * sense data. 1032 */ 1033 if (cmd->data_length <= 18) { 1034 buf[7] = 0x00; 1035 err = -EINVAL; 1036 goto end; 1037 } 1038 /* 1039 * The Additional Sense Code (ASC) from the UNIT ATTENTION 1040 */ 1041 buf[SPC_ASC_KEY_OFFSET] = ua_asc; 1042 buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; 1043 buf[7] = 0x0A; 1044 } else { 1045 /* 1046 * CURRENT ERROR, NO SENSE 1047 */ 1048 buf[0] = 0x70; 1049 buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; 1050 /* 1051 * Make sure request data length is enough for additional 1052 * sense data. 1053 */ 1054 if (cmd->data_length <= 18) { 1055 buf[7] = 0x00; 1056 err = -EINVAL; 1057 goto end; 1058 } 1059 /* 1060 * NO ADDITIONAL SENSE INFORMATION 1061 */ 1062 buf[SPC_ASC_KEY_OFFSET] = 0x00; 1063 buf[7] = 0x0A; 1064 } 1065 1066end: 1067 transport_kunmap_first_data_page(cmd); 1068 1069 return 0; 1070} 1071 1072/* 1073 * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. 1074 * Note this is not used for TCM/pSCSI passthrough 1075 */ 1076static int 1077target_emulate_unmap(struct se_task *task) 1078{ 1079 struct se_cmd *cmd = task->task_se_cmd; 1080 struct se_device *dev = cmd->se_dev; 1081 unsigned char *buf, *ptr = NULL; 1082 unsigned char *cdb = &cmd->t_task_cdb[0]; 1083 sector_t lba; 1084 unsigned int size = cmd->data_length, range; 1085 int ret = 0, offset; 1086 unsigned short dl, bd_dl; 1087 1088 if (!dev->transport->do_discard) { 1089 pr_err("UNMAP emulation not supported for: %s\n", 1090 dev->transport->name); 1091 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; 1092 } 1093 1094 /* First UNMAP block descriptor starts at 8 byte offset */ 1095 offset = 8; 1096 size -= 8; 1097 dl = get_unaligned_be16(&cdb[0]); 1098 bd_dl = get_unaligned_be16(&cdb[2]); 1099 1100 buf = transport_kmap_first_data_page(cmd); 1101 1102 ptr = &buf[offset]; 1103 pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu" 1104 " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); 1105 1106 while (size) { 1107 lba = get_unaligned_be64(&ptr[0]); 1108 range = get_unaligned_be32(&ptr[8]); 1109 pr_debug("UNMAP: Using lba: %llu and range: %u\n", 1110 (unsigned long long)lba, range); 1111 1112 ret = dev->transport->do_discard(dev, lba, range); 1113 if (ret < 0) { 1114 pr_err("blkdev_issue_discard() failed: %d\n", 1115 ret); 1116 goto err; 1117 } 1118 1119 ptr += 16; 1120 size -= 16; 1121 } 1122 1123err: 1124 transport_kunmap_first_data_page(cmd); 1125 1126 return ret; 1127} 1128 1129/* 1130 * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. 1131 * Note this is not used for TCM/pSCSI passthrough 1132 */ 1133static int 1134target_emulate_write_same(struct se_task *task) 1135{ 1136 struct se_cmd *cmd = task->task_se_cmd; 1137 struct se_device *dev = cmd->se_dev; 1138 sector_t range; 1139 sector_t lba = cmd->t_task_lba; 1140 u32 num_blocks; 1141 int ret; 1142 1143 if (!dev->transport->do_discard) { 1144 pr_err("WRITE_SAME emulation not supported" 1145 " for: %s\n", dev->transport->name); 1146 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; 1147 } 1148 1149 if (cmd->t_task_cdb[0] == WRITE_SAME) 1150 num_blocks = get_unaligned_be16(&cmd->t_task_cdb[7]); 1151 else if (cmd->t_task_cdb[0] == WRITE_SAME_16) 1152 num_blocks = get_unaligned_be32(&cmd->t_task_cdb[10]); 1153 else /* WRITE_SAME_32 via VARIABLE_LENGTH_CMD */ 1154 num_blocks = get_unaligned_be32(&cmd->t_task_cdb[28]); 1155 1156 /* 1157 * Use the explicit range when non zero is supplied, otherwise calculate 1158 * the remaining range based on ->get_blocks() - starting LBA. 1159 */ 1160 if (num_blocks != 0) 1161 range = num_blocks; 1162 else 1163 range = (dev->transport->get_blocks(dev) - lba); 1164 1165 pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n", 1166 (unsigned long long)lba, (unsigned long long)range); 1167 1168 ret = dev->transport->do_discard(dev, lba, range); 1169 if (ret < 0) { 1170 pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n"); 1171 return ret; 1172 } 1173 1174 return 0; 1175} 1176 1177static int 1178target_emulate_synchronize_cache(struct se_task *task) 1179{ 1180 struct se_device *dev = task->task_se_cmd->se_dev; 1181 1182 if (!dev->transport->do_sync_cache) { 1183 pr_err("SYNCHRONIZE_CACHE emulation not supported" 1184 " for: %s\n", dev->transport->name); 1185 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; 1186 } 1187 1188 dev->transport->do_sync_cache(task); 1189 return 0; 1190} 1191 1192int 1193transport_emulate_control_cdb(struct se_task *task) 1194{ 1195 struct se_cmd *cmd = task->task_se_cmd; 1196 struct se_device *dev = cmd->se_dev; 1197 unsigned short service_action; 1198 int ret = 0; 1199 1200 switch (cmd->t_task_cdb[0]) { 1201 case INQUIRY: 1202 ret = target_emulate_inquiry(task); 1203 break; 1204 case READ_CAPACITY: 1205 ret = target_emulate_readcapacity(task); 1206 break; 1207 case MODE_SENSE: 1208 ret = target_emulate_modesense(task); 1209 break; 1210 case MODE_SENSE_10: 1211 ret = target_emulate_modesense(task); 1212 break; 1213 case SERVICE_ACTION_IN: 1214 switch (cmd->t_task_cdb[1] & 0x1f) { 1215 case SAI_READ_CAPACITY_16: 1216 ret = target_emulate_readcapacity_16(task); 1217 break; 1218 default: 1219 pr_err("Unsupported SA: 0x%02x\n", 1220 cmd->t_task_cdb[1] & 0x1f); 1221 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; 1222 } 1223 break; 1224 case REQUEST_SENSE: 1225 ret = target_emulate_request_sense(task); 1226 break; 1227 case UNMAP: 1228 ret = target_emulate_unmap(task); 1229 break; 1230 case WRITE_SAME: 1231 ret = target_emulate_write_same(task); 1232 break; 1233 case WRITE_SAME_16: 1234 ret = target_emulate_write_same(task); 1235 break; 1236 case VARIABLE_LENGTH_CMD: 1237 service_action = 1238 get_unaligned_be16(&cmd->t_task_cdb[8]); 1239 switch (service_action) { 1240 case WRITE_SAME_32: 1241 ret = target_emulate_write_same(task); 1242 break; 1243 default: 1244 pr_err("Unsupported VARIABLE_LENGTH_CMD SA:" 1245 " 0x%02x\n", service_action); 1246 break; 1247 } 1248 break; 1249 case SYNCHRONIZE_CACHE: 1250 case 0x91: /* SYNCHRONIZE_CACHE_16: */ 1251 ret = target_emulate_synchronize_cache(task); 1252 break; 1253 case ALLOW_MEDIUM_REMOVAL: 1254 case ERASE: 1255 case REZERO_UNIT: 1256 case SEEK_10: 1257 case SPACE: 1258 case START_STOP: 1259 case TEST_UNIT_READY: 1260 case VERIFY: 1261 case WRITE_FILEMARKS: 1262 break; 1263 default: 1264 pr_err("Unsupported SCSI Opcode: 0x%02x for %s\n", 1265 cmd->t_task_cdb[0], dev->transport->name); 1266 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; 1267 } 1268 1269 if (ret < 0) 1270 return ret; 1271 /* 1272 * Handle the successful completion here unless a caller 1273 * has explictly requested an asychronous completion. 1274 */ 1275 if (!(cmd->se_cmd_flags & SCF_EMULATE_CDB_ASYNC)) { 1276 task->task_scsi_status = GOOD; 1277 transport_complete_task(task, 1); 1278 } 1279 1280 return PYX_TRANSPORT_SENT_TO_TRANSPORT; 1281} 1282 1283/* 1284 * Write a CDB into @cdb that is based on the one the intiator sent us, 1285 * but updated to only cover the sectors that the current task handles. 1286 */ 1287void target_get_task_cdb(struct se_task *task, unsigned char *cdb) 1288{ 1289 struct se_cmd *cmd = task->task_se_cmd; 1290 unsigned int cdb_len = scsi_command_size(cmd->t_task_cdb); 1291 1292 memcpy(cdb, cmd->t_task_cdb, cdb_len); 1293 if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) { 1294 unsigned long long lba = task->task_lba; 1295 u32 sectors = task->task_sectors; 1296 1297 switch (cdb_len) { 1298 case 6: 1299 /* 21-bit LBA and 8-bit sectors */ 1300 cdb[1] = (lba >> 16) & 0x1f; 1301 cdb[2] = (lba >> 8) & 0xff; 1302 cdb[3] = lba & 0xff; 1303 cdb[4] = sectors & 0xff; 1304 break; 1305 case 10: 1306 /* 32-bit LBA and 16-bit sectors */ 1307 put_unaligned_be32(lba, &cdb[2]); 1308 put_unaligned_be16(sectors, &cdb[7]); 1309 break; 1310 case 12: 1311 /* 32-bit LBA and 32-bit sectors */ 1312 put_unaligned_be32(lba, &cdb[2]); 1313 put_unaligned_be32(sectors, &cdb[6]); 1314 break; 1315 case 16: 1316 /* 64-bit LBA and 32-bit sectors */ 1317 put_unaligned_be64(lba, &cdb[2]); 1318 put_unaligned_be32(sectors, &cdb[10]); 1319 break; 1320 case 32: 1321 /* 64-bit LBA and 32-bit sectors, extended CDB */ 1322 put_unaligned_be64(lba, &cdb[12]); 1323 put_unaligned_be32(sectors, &cdb[28]); 1324 break; 1325 default: 1326 BUG(); 1327 } 1328 } 1329} 1330EXPORT_SYMBOL(target_get_task_cdb); 1331