1 /* 2 * SCSI Device emulation 3 * 4 * Copyright (c) 2006 CodeSourcery. 5 * Based on code by Fabrice Bellard 6 * 7 * Written by Paul Brook 8 * Modifications: 9 * 2009-Dec-12 Artyom Tarasenko : implemented stamdard inquiry for the case 10 * when the allocation length of CDB is smaller 11 * than 36. 12 * 2009-Oct-13 Artyom Tarasenko : implemented the block descriptor in the 13 * MODE SENSE response. 14 * 15 * This code is licensed under the LGPL. 16 * 17 * Note that this file only handles the SCSI architecture model and device 18 * commands. Emulation of interface/link layer protocols is handled by 19 * the host adapter emulator. 20 */ 21 22 //#define DEBUG_SCSI 23 24 #ifdef DEBUG_SCSI 25 #define DPRINTF(fmt, ...) \ 26 do { printf("scsi-disk: " fmt , ## __VA_ARGS__); } while (0) 27 #else 28 #define DPRINTF(fmt, ...) do {} while(0) 29 #endif 30 31 #include "qemu-common.h" 32 #include "qemu/error-report.h" 33 #include "hw/scsi/scsi.h" 34 #include "block/scsi.h" 35 #include "sysemu/sysemu.h" 36 #include "sysemu/block-backend.h" 37 #include "sysemu/blockdev.h" 38 #include "hw/block/block.h" 39 #include "sysemu/dma.h" 40 41 #ifdef __linux 42 #include <scsi/sg.h> 43 #endif 44 45 #define SCSI_WRITE_SAME_MAX 524288 46 #define SCSI_DMA_BUF_SIZE 131072 47 #define SCSI_MAX_INQUIRY_LEN 256 48 #define SCSI_MAX_MODE_LEN 256 49 50 #define DEFAULT_DISCARD_GRANULARITY 4096 51 #define DEFAULT_MAX_UNMAP_SIZE (1 << 30) /* 1 GB */ 52 #define DEFAULT_MAX_IO_SIZE INT_MAX /* 2 GB - 1 block */ 53 54 typedef struct SCSIDiskState SCSIDiskState; 55 56 typedef struct SCSIDiskReq { 57 SCSIRequest req; 58 /* Both sector and sector_count are in terms of qemu 512 byte blocks. */ 59 uint64_t sector; 60 uint32_t sector_count; 61 uint32_t buflen; 62 bool started; 63 struct iovec iov; 64 QEMUIOVector qiov; 65 BlockAcctCookie acct; 66 } SCSIDiskReq; 67 68 #define SCSI_DISK_F_REMOVABLE 0 69 #define SCSI_DISK_F_DPOFUA 1 70 #define SCSI_DISK_F_NO_REMOVABLE_DEVOPS 2 71 72 struct SCSIDiskState 73 { 74 SCSIDevice qdev; 75 uint32_t features; 76 bool media_changed; 77 bool media_event; 78 bool eject_request; 79 uint64_t wwn; 80 uint64_t port_wwn; 81 uint16_t port_index; 82 uint64_t max_unmap_size; 83 uint64_t max_io_size; 84 QEMUBH *bh; 85 char *version; 86 char *serial; 87 char *vendor; 88 char *product; 89 bool tray_open; 90 bool tray_locked; 91 }; 92 93 static int scsi_handle_rw_error(SCSIDiskReq *r, int error); 94 95 static void scsi_free_request(SCSIRequest *req) 96 { 97 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 98 99 qemu_vfree(r->iov.iov_base); 100 } 101 102 /* Helper function for command completion with sense. */ 103 static void scsi_check_condition(SCSIDiskReq *r, SCSISense sense) 104 { 105 DPRINTF("Command complete tag=0x%x sense=%d/%d/%d\n", 106 r->req.tag, sense.key, sense.asc, sense.ascq); 107 scsi_req_build_sense(&r->req, sense); 108 scsi_req_complete(&r->req, CHECK_CONDITION); 109 } 110 111 static uint32_t scsi_init_iovec(SCSIDiskReq *r, size_t size) 112 { 113 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 114 115 if (!r->iov.iov_base) { 116 r->buflen = size; 117 r->iov.iov_base = blk_blockalign(s->qdev.conf.blk, r->buflen); 118 } 119 r->iov.iov_len = MIN(r->sector_count * 512, r->buflen); 120 qemu_iovec_init_external(&r->qiov, &r->iov, 1); 121 return r->qiov.size / 512; 122 } 123 124 static void scsi_disk_save_request(QEMUFile *f, SCSIRequest *req) 125 { 126 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 127 128 qemu_put_be64s(f, &r->sector); 129 qemu_put_be32s(f, &r->sector_count); 130 qemu_put_be32s(f, &r->buflen); 131 if (r->buflen) { 132 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) { 133 qemu_put_buffer(f, r->iov.iov_base, r->iov.iov_len); 134 } else if (!req->retry) { 135 uint32_t len = r->iov.iov_len; 136 qemu_put_be32s(f, &len); 137 qemu_put_buffer(f, r->iov.iov_base, r->iov.iov_len); 138 } 139 } 140 } 141 142 static void scsi_disk_load_request(QEMUFile *f, SCSIRequest *req) 143 { 144 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 145 146 qemu_get_be64s(f, &r->sector); 147 qemu_get_be32s(f, &r->sector_count); 148 qemu_get_be32s(f, &r->buflen); 149 if (r->buflen) { 150 scsi_init_iovec(r, r->buflen); 151 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) { 152 qemu_get_buffer(f, r->iov.iov_base, r->iov.iov_len); 153 } else if (!r->req.retry) { 154 uint32_t len; 155 qemu_get_be32s(f, &len); 156 r->iov.iov_len = len; 157 assert(r->iov.iov_len <= r->buflen); 158 qemu_get_buffer(f, r->iov.iov_base, r->iov.iov_len); 159 } 160 } 161 162 qemu_iovec_init_external(&r->qiov, &r->iov, 1); 163 } 164 165 static void scsi_aio_complete(void *opaque, int ret) 166 { 167 SCSIDiskReq *r = (SCSIDiskReq *)opaque; 168 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 169 170 assert(r->req.aiocb != NULL); 171 r->req.aiocb = NULL; 172 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct); 173 if (r->req.io_canceled) { 174 scsi_req_cancel_complete(&r->req); 175 goto done; 176 } 177 178 if (ret < 0) { 179 if (scsi_handle_rw_error(r, -ret)) { 180 goto done; 181 } 182 } 183 184 scsi_req_complete(&r->req, GOOD); 185 186 done: 187 scsi_req_unref(&r->req); 188 } 189 190 static bool scsi_is_cmd_fua(SCSICommand *cmd) 191 { 192 switch (cmd->buf[0]) { 193 case READ_10: 194 case READ_12: 195 case READ_16: 196 case WRITE_10: 197 case WRITE_12: 198 case WRITE_16: 199 return (cmd->buf[1] & 8) != 0; 200 201 case VERIFY_10: 202 case VERIFY_12: 203 case VERIFY_16: 204 case WRITE_VERIFY_10: 205 case WRITE_VERIFY_12: 206 case WRITE_VERIFY_16: 207 return true; 208 209 case READ_6: 210 case WRITE_6: 211 default: 212 return false; 213 } 214 } 215 216 static void scsi_write_do_fua(SCSIDiskReq *r) 217 { 218 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 219 220 if (r->req.io_canceled) { 221 scsi_req_cancel_complete(&r->req); 222 goto done; 223 } 224 225 if (scsi_is_cmd_fua(&r->req.cmd)) { 226 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 0, 227 BLOCK_ACCT_FLUSH); 228 r->req.aiocb = blk_aio_flush(s->qdev.conf.blk, scsi_aio_complete, r); 229 return; 230 } 231 232 scsi_req_complete(&r->req, GOOD); 233 234 done: 235 scsi_req_unref(&r->req); 236 } 237 238 static void scsi_dma_complete_noio(void *opaque, int ret) 239 { 240 SCSIDiskReq *r = (SCSIDiskReq *)opaque; 241 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 242 243 if (r->req.aiocb != NULL) { 244 r->req.aiocb = NULL; 245 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct); 246 } 247 if (r->req.io_canceled) { 248 scsi_req_cancel_complete(&r->req); 249 goto done; 250 } 251 252 if (ret < 0) { 253 if (scsi_handle_rw_error(r, -ret)) { 254 goto done; 255 } 256 } 257 258 r->sector += r->sector_count; 259 r->sector_count = 0; 260 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) { 261 scsi_write_do_fua(r); 262 return; 263 } else { 264 scsi_req_complete(&r->req, GOOD); 265 } 266 267 done: 268 scsi_req_unref(&r->req); 269 } 270 271 static void scsi_dma_complete(void *opaque, int ret) 272 { 273 SCSIDiskReq *r = (SCSIDiskReq *)opaque; 274 275 assert(r->req.aiocb != NULL); 276 scsi_dma_complete_noio(opaque, ret); 277 } 278 279 static void scsi_read_complete(void * opaque, int ret) 280 { 281 SCSIDiskReq *r = (SCSIDiskReq *)opaque; 282 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 283 int n; 284 285 assert(r->req.aiocb != NULL); 286 r->req.aiocb = NULL; 287 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct); 288 if (r->req.io_canceled) { 289 scsi_req_cancel_complete(&r->req); 290 goto done; 291 } 292 293 if (ret < 0) { 294 if (scsi_handle_rw_error(r, -ret)) { 295 goto done; 296 } 297 } 298 299 DPRINTF("Data ready tag=0x%x len=%zd\n", r->req.tag, r->qiov.size); 300 301 n = r->qiov.size / 512; 302 r->sector += n; 303 r->sector_count -= n; 304 scsi_req_data(&r->req, r->qiov.size); 305 306 done: 307 scsi_req_unref(&r->req); 308 } 309 310 /* Actually issue a read to the block device. */ 311 static void scsi_do_read(void *opaque, int ret) 312 { 313 SCSIDiskReq *r = opaque; 314 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 315 uint32_t n; 316 317 if (r->req.aiocb != NULL) { 318 r->req.aiocb = NULL; 319 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct); 320 } 321 if (r->req.io_canceled) { 322 scsi_req_cancel_complete(&r->req); 323 goto done; 324 } 325 326 if (ret < 0) { 327 if (scsi_handle_rw_error(r, -ret)) { 328 goto done; 329 } 330 } 331 332 /* The request is used as the AIO opaque value, so add a ref. */ 333 scsi_req_ref(&r->req); 334 335 if (r->req.sg) { 336 dma_acct_start(s->qdev.conf.blk, &r->acct, r->req.sg, BLOCK_ACCT_READ); 337 r->req.resid -= r->req.sg->size; 338 r->req.aiocb = dma_blk_read(s->qdev.conf.blk, r->req.sg, r->sector, 339 scsi_dma_complete, r); 340 } else { 341 n = scsi_init_iovec(r, SCSI_DMA_BUF_SIZE); 342 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 343 n * BDRV_SECTOR_SIZE, BLOCK_ACCT_READ); 344 r->req.aiocb = blk_aio_readv(s->qdev.conf.blk, r->sector, &r->qiov, n, 345 scsi_read_complete, r); 346 } 347 348 done: 349 scsi_req_unref(&r->req); 350 } 351 352 /* Read more data from scsi device into buffer. */ 353 static void scsi_read_data(SCSIRequest *req) 354 { 355 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 356 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 357 bool first; 358 359 DPRINTF("Read sector_count=%d\n", r->sector_count); 360 if (r->sector_count == 0) { 361 /* This also clears the sense buffer for REQUEST SENSE. */ 362 scsi_req_complete(&r->req, GOOD); 363 return; 364 } 365 366 /* No data transfer may already be in progress */ 367 assert(r->req.aiocb == NULL); 368 369 /* The request is used as the AIO opaque value, so add a ref. */ 370 scsi_req_ref(&r->req); 371 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) { 372 DPRINTF("Data transfer direction invalid\n"); 373 scsi_read_complete(r, -EINVAL); 374 return; 375 } 376 377 if (s->tray_open) { 378 scsi_read_complete(r, -ENOMEDIUM); 379 return; 380 } 381 382 first = !r->started; 383 r->started = true; 384 if (first && scsi_is_cmd_fua(&r->req.cmd)) { 385 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 0, 386 BLOCK_ACCT_FLUSH); 387 r->req.aiocb = blk_aio_flush(s->qdev.conf.blk, scsi_do_read, r); 388 } else { 389 scsi_do_read(r, 0); 390 } 391 } 392 393 /* 394 * scsi_handle_rw_error has two return values. 0 means that the error 395 * must be ignored, 1 means that the error has been processed and the 396 * caller should not do anything else for this request. Note that 397 * scsi_handle_rw_error always manages its reference counts, independent 398 * of the return value. 399 */ 400 static int scsi_handle_rw_error(SCSIDiskReq *r, int error) 401 { 402 bool is_read = (r->req.cmd.xfer == SCSI_XFER_FROM_DEV); 403 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 404 BlockErrorAction action = blk_get_error_action(s->qdev.conf.blk, 405 is_read, error); 406 407 if (action == BLOCK_ERROR_ACTION_REPORT) { 408 switch (error) { 409 case ENOMEDIUM: 410 scsi_check_condition(r, SENSE_CODE(NO_MEDIUM)); 411 break; 412 case ENOMEM: 413 scsi_check_condition(r, SENSE_CODE(TARGET_FAILURE)); 414 break; 415 case EINVAL: 416 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); 417 break; 418 case ENOSPC: 419 scsi_check_condition(r, SENSE_CODE(SPACE_ALLOC_FAILED)); 420 break; 421 default: 422 scsi_check_condition(r, SENSE_CODE(IO_ERROR)); 423 break; 424 } 425 } 426 blk_error_action(s->qdev.conf.blk, action, is_read, error); 427 if (action == BLOCK_ERROR_ACTION_STOP) { 428 scsi_req_retry(&r->req); 429 } 430 return action != BLOCK_ERROR_ACTION_IGNORE; 431 } 432 433 static void scsi_write_complete(void * opaque, int ret) 434 { 435 SCSIDiskReq *r = (SCSIDiskReq *)opaque; 436 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 437 uint32_t n; 438 439 if (r->req.aiocb != NULL) { 440 r->req.aiocb = NULL; 441 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct); 442 } 443 if (r->req.io_canceled) { 444 scsi_req_cancel_complete(&r->req); 445 goto done; 446 } 447 448 if (ret < 0) { 449 if (scsi_handle_rw_error(r, -ret)) { 450 goto done; 451 } 452 } 453 454 n = r->qiov.size / 512; 455 r->sector += n; 456 r->sector_count -= n; 457 if (r->sector_count == 0) { 458 scsi_write_do_fua(r); 459 return; 460 } else { 461 scsi_init_iovec(r, SCSI_DMA_BUF_SIZE); 462 DPRINTF("Write complete tag=0x%x more=%zd\n", r->req.tag, r->qiov.size); 463 scsi_req_data(&r->req, r->qiov.size); 464 } 465 466 done: 467 scsi_req_unref(&r->req); 468 } 469 470 static void scsi_write_data(SCSIRequest *req) 471 { 472 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 473 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 474 uint32_t n; 475 476 /* No data transfer may already be in progress */ 477 assert(r->req.aiocb == NULL); 478 479 /* The request is used as the AIO opaque value, so add a ref. */ 480 scsi_req_ref(&r->req); 481 if (r->req.cmd.mode != SCSI_XFER_TO_DEV) { 482 DPRINTF("Data transfer direction invalid\n"); 483 scsi_write_complete(r, -EINVAL); 484 return; 485 } 486 487 if (!r->req.sg && !r->qiov.size) { 488 /* Called for the first time. Ask the driver to send us more data. */ 489 r->started = true; 490 scsi_write_complete(r, 0); 491 return; 492 } 493 if (s->tray_open) { 494 scsi_write_complete(r, -ENOMEDIUM); 495 return; 496 } 497 498 if (r->req.cmd.buf[0] == VERIFY_10 || r->req.cmd.buf[0] == VERIFY_12 || 499 r->req.cmd.buf[0] == VERIFY_16) { 500 if (r->req.sg) { 501 scsi_dma_complete_noio(r, 0); 502 } else { 503 scsi_write_complete(r, 0); 504 } 505 return; 506 } 507 508 if (r->req.sg) { 509 dma_acct_start(s->qdev.conf.blk, &r->acct, r->req.sg, BLOCK_ACCT_WRITE); 510 r->req.resid -= r->req.sg->size; 511 r->req.aiocb = dma_blk_write(s->qdev.conf.blk, r->req.sg, r->sector, 512 scsi_dma_complete, r); 513 } else { 514 n = r->qiov.size / 512; 515 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 516 n * BDRV_SECTOR_SIZE, BLOCK_ACCT_WRITE); 517 r->req.aiocb = blk_aio_writev(s->qdev.conf.blk, r->sector, &r->qiov, n, 518 scsi_write_complete, r); 519 } 520 } 521 522 /* Return a pointer to the data buffer. */ 523 static uint8_t *scsi_get_buf(SCSIRequest *req) 524 { 525 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 526 527 return (uint8_t *)r->iov.iov_base; 528 } 529 530 static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf) 531 { 532 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); 533 int buflen = 0; 534 int start; 535 536 if (req->cmd.buf[1] & 0x1) { 537 /* Vital product data */ 538 uint8_t page_code = req->cmd.buf[2]; 539 540 outbuf[buflen++] = s->qdev.type & 0x1f; 541 outbuf[buflen++] = page_code ; // this page 542 outbuf[buflen++] = 0x00; 543 outbuf[buflen++] = 0x00; 544 start = buflen; 545 546 switch (page_code) { 547 case 0x00: /* Supported page codes, mandatory */ 548 { 549 DPRINTF("Inquiry EVPD[Supported pages] " 550 "buffer size %zd\n", req->cmd.xfer); 551 outbuf[buflen++] = 0x00; // list of supported pages (this page) 552 if (s->serial) { 553 outbuf[buflen++] = 0x80; // unit serial number 554 } 555 outbuf[buflen++] = 0x83; // device identification 556 if (s->qdev.type == TYPE_DISK) { 557 outbuf[buflen++] = 0xb0; // block limits 558 outbuf[buflen++] = 0xb2; // thin provisioning 559 } 560 break; 561 } 562 case 0x80: /* Device serial number, optional */ 563 { 564 int l; 565 566 if (!s->serial) { 567 DPRINTF("Inquiry (EVPD[Serial number] not supported\n"); 568 return -1; 569 } 570 571 l = strlen(s->serial); 572 if (l > 20) { 573 l = 20; 574 } 575 576 DPRINTF("Inquiry EVPD[Serial number] " 577 "buffer size %zd\n", req->cmd.xfer); 578 memcpy(outbuf+buflen, s->serial, l); 579 buflen += l; 580 break; 581 } 582 583 case 0x83: /* Device identification page, mandatory */ 584 { 585 const char *str = s->serial ?: blk_name(s->qdev.conf.blk); 586 int max_len = s->serial ? 20 : 255 - 8; 587 int id_len = strlen(str); 588 589 if (id_len > max_len) { 590 id_len = max_len; 591 } 592 DPRINTF("Inquiry EVPD[Device identification] " 593 "buffer size %zd\n", req->cmd.xfer); 594 595 outbuf[buflen++] = 0x2; // ASCII 596 outbuf[buflen++] = 0; // not officially assigned 597 outbuf[buflen++] = 0; // reserved 598 outbuf[buflen++] = id_len; // length of data following 599 memcpy(outbuf+buflen, str, id_len); 600 buflen += id_len; 601 602 if (s->wwn) { 603 outbuf[buflen++] = 0x1; // Binary 604 outbuf[buflen++] = 0x3; // NAA 605 outbuf[buflen++] = 0; // reserved 606 outbuf[buflen++] = 8; 607 stq_be_p(&outbuf[buflen], s->wwn); 608 buflen += 8; 609 } 610 611 if (s->port_wwn) { 612 outbuf[buflen++] = 0x61; // SAS / Binary 613 outbuf[buflen++] = 0x93; // PIV / Target port / NAA 614 outbuf[buflen++] = 0; // reserved 615 outbuf[buflen++] = 8; 616 stq_be_p(&outbuf[buflen], s->port_wwn); 617 buflen += 8; 618 } 619 620 if (s->port_index) { 621 outbuf[buflen++] = 0x61; // SAS / Binary 622 outbuf[buflen++] = 0x94; // PIV / Target port / relative target port 623 outbuf[buflen++] = 0; // reserved 624 outbuf[buflen++] = 4; 625 stw_be_p(&outbuf[buflen + 2], s->port_index); 626 buflen += 4; 627 } 628 break; 629 } 630 case 0xb0: /* block limits */ 631 { 632 unsigned int unmap_sectors = 633 s->qdev.conf.discard_granularity / s->qdev.blocksize; 634 unsigned int min_io_size = 635 s->qdev.conf.min_io_size / s->qdev.blocksize; 636 unsigned int opt_io_size = 637 s->qdev.conf.opt_io_size / s->qdev.blocksize; 638 unsigned int max_unmap_sectors = 639 s->max_unmap_size / s->qdev.blocksize; 640 unsigned int max_io_sectors = 641 s->max_io_size / s->qdev.blocksize; 642 643 if (s->qdev.type == TYPE_ROM) { 644 DPRINTF("Inquiry (EVPD[%02X] not supported for CDROM\n", 645 page_code); 646 return -1; 647 } 648 /* required VPD size with unmap support */ 649 buflen = 0x40; 650 memset(outbuf + 4, 0, buflen - 4); 651 652 outbuf[4] = 0x1; /* wsnz */ 653 654 /* optimal transfer length granularity */ 655 outbuf[6] = (min_io_size >> 8) & 0xff; 656 outbuf[7] = min_io_size & 0xff; 657 658 /* maximum transfer length */ 659 outbuf[8] = (max_io_sectors >> 24) & 0xff; 660 outbuf[9] = (max_io_sectors >> 16) & 0xff; 661 outbuf[10] = (max_io_sectors >> 8) & 0xff; 662 outbuf[11] = max_io_sectors & 0xff; 663 664 /* optimal transfer length */ 665 outbuf[12] = (opt_io_size >> 24) & 0xff; 666 outbuf[13] = (opt_io_size >> 16) & 0xff; 667 outbuf[14] = (opt_io_size >> 8) & 0xff; 668 outbuf[15] = opt_io_size & 0xff; 669 670 /* max unmap LBA count, default is 1GB */ 671 outbuf[20] = (max_unmap_sectors >> 24) & 0xff; 672 outbuf[21] = (max_unmap_sectors >> 16) & 0xff; 673 outbuf[22] = (max_unmap_sectors >> 8) & 0xff; 674 outbuf[23] = max_unmap_sectors & 0xff; 675 676 /* max unmap descriptors, 255 fit in 4 kb with an 8-byte header. */ 677 outbuf[24] = 0; 678 outbuf[25] = 0; 679 outbuf[26] = 0; 680 outbuf[27] = 255; 681 682 /* optimal unmap granularity */ 683 outbuf[28] = (unmap_sectors >> 24) & 0xff; 684 outbuf[29] = (unmap_sectors >> 16) & 0xff; 685 outbuf[30] = (unmap_sectors >> 8) & 0xff; 686 outbuf[31] = unmap_sectors & 0xff; 687 688 /* max write same size */ 689 outbuf[36] = 0; 690 outbuf[37] = 0; 691 outbuf[38] = 0; 692 outbuf[39] = 0; 693 694 outbuf[40] = (max_io_sectors >> 24) & 0xff; 695 outbuf[41] = (max_io_sectors >> 16) & 0xff; 696 outbuf[42] = (max_io_sectors >> 8) & 0xff; 697 outbuf[43] = max_io_sectors & 0xff; 698 break; 699 } 700 case 0xb2: /* thin provisioning */ 701 { 702 buflen = 8; 703 outbuf[4] = 0; 704 outbuf[5] = 0xe0; /* unmap & write_same 10/16 all supported */ 705 outbuf[6] = s->qdev.conf.discard_granularity ? 2 : 1; 706 outbuf[7] = 0; 707 break; 708 } 709 default: 710 return -1; 711 } 712 /* done with EVPD */ 713 assert(buflen - start <= 255); 714 outbuf[start - 1] = buflen - start; 715 return buflen; 716 } 717 718 /* Standard INQUIRY data */ 719 if (req->cmd.buf[2] != 0) { 720 return -1; 721 } 722 723 /* PAGE CODE == 0 */ 724 buflen = req->cmd.xfer; 725 if (buflen > SCSI_MAX_INQUIRY_LEN) { 726 buflen = SCSI_MAX_INQUIRY_LEN; 727 } 728 729 outbuf[0] = s->qdev.type & 0x1f; 730 outbuf[1] = (s->features & (1 << SCSI_DISK_F_REMOVABLE)) ? 0x80 : 0; 731 732 strpadcpy((char *) &outbuf[16], 16, s->product, ' '); 733 strpadcpy((char *) &outbuf[8], 8, s->vendor, ' '); 734 735 memset(&outbuf[32], 0, 4); 736 memcpy(&outbuf[32], s->version, MIN(4, strlen(s->version))); 737 /* 738 * We claim conformance to SPC-3, which is required for guests 739 * to ask for modern features like READ CAPACITY(16) or the 740 * block characteristics VPD page by default. Not all of SPC-3 741 * is actually implemented, but we're good enough. 742 */ 743 outbuf[2] = 5; 744 outbuf[3] = 2 | 0x10; /* Format 2, HiSup */ 745 746 if (buflen > 36) { 747 outbuf[4] = buflen - 5; /* Additional Length = (Len - 1) - 4 */ 748 } else { 749 /* If the allocation length of CDB is too small, 750 the additional length is not adjusted */ 751 outbuf[4] = 36 - 5; 752 } 753 754 /* Sync data transfer and TCQ. */ 755 outbuf[7] = 0x10 | (req->bus->info->tcq ? 0x02 : 0); 756 return buflen; 757 } 758 759 static inline bool media_is_dvd(SCSIDiskState *s) 760 { 761 uint64_t nb_sectors; 762 if (s->qdev.type != TYPE_ROM) { 763 return false; 764 } 765 if (!blk_is_inserted(s->qdev.conf.blk)) { 766 return false; 767 } 768 blk_get_geometry(s->qdev.conf.blk, &nb_sectors); 769 return nb_sectors > CD_MAX_SECTORS; 770 } 771 772 static inline bool media_is_cd(SCSIDiskState *s) 773 { 774 uint64_t nb_sectors; 775 if (s->qdev.type != TYPE_ROM) { 776 return false; 777 } 778 if (!blk_is_inserted(s->qdev.conf.blk)) { 779 return false; 780 } 781 blk_get_geometry(s->qdev.conf.blk, &nb_sectors); 782 return nb_sectors <= CD_MAX_SECTORS; 783 } 784 785 static int scsi_read_disc_information(SCSIDiskState *s, SCSIDiskReq *r, 786 uint8_t *outbuf) 787 { 788 uint8_t type = r->req.cmd.buf[1] & 7; 789 790 if (s->qdev.type != TYPE_ROM) { 791 return -1; 792 } 793 794 /* Types 1/2 are only defined for Blu-Ray. */ 795 if (type != 0) { 796 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); 797 return -1; 798 } 799 800 memset(outbuf, 0, 34); 801 outbuf[1] = 32; 802 outbuf[2] = 0xe; /* last session complete, disc finalized */ 803 outbuf[3] = 1; /* first track on disc */ 804 outbuf[4] = 1; /* # of sessions */ 805 outbuf[5] = 1; /* first track of last session */ 806 outbuf[6] = 1; /* last track of last session */ 807 outbuf[7] = 0x20; /* unrestricted use */ 808 outbuf[8] = 0x00; /* CD-ROM or DVD-ROM */ 809 /* 9-10-11: most significant byte corresponding bytes 4-5-6 */ 810 /* 12-23: not meaningful for CD-ROM or DVD-ROM */ 811 /* 24-31: disc bar code */ 812 /* 32: disc application code */ 813 /* 33: number of OPC tables */ 814 815 return 34; 816 } 817 818 static int scsi_read_dvd_structure(SCSIDiskState *s, SCSIDiskReq *r, 819 uint8_t *outbuf) 820 { 821 static const int rds_caps_size[5] = { 822 [0] = 2048 + 4, 823 [1] = 4 + 4, 824 [3] = 188 + 4, 825 [4] = 2048 + 4, 826 }; 827 828 uint8_t media = r->req.cmd.buf[1]; 829 uint8_t layer = r->req.cmd.buf[6]; 830 uint8_t format = r->req.cmd.buf[7]; 831 int size = -1; 832 833 if (s->qdev.type != TYPE_ROM) { 834 return -1; 835 } 836 if (media != 0) { 837 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); 838 return -1; 839 } 840 841 if (format != 0xff) { 842 if (s->tray_open || !blk_is_inserted(s->qdev.conf.blk)) { 843 scsi_check_condition(r, SENSE_CODE(NO_MEDIUM)); 844 return -1; 845 } 846 if (media_is_cd(s)) { 847 scsi_check_condition(r, SENSE_CODE(INCOMPATIBLE_FORMAT)); 848 return -1; 849 } 850 if (format >= ARRAY_SIZE(rds_caps_size)) { 851 return -1; 852 } 853 size = rds_caps_size[format]; 854 memset(outbuf, 0, size); 855 } 856 857 switch (format) { 858 case 0x00: { 859 /* Physical format information */ 860 uint64_t nb_sectors; 861 if (layer != 0) { 862 goto fail; 863 } 864 blk_get_geometry(s->qdev.conf.blk, &nb_sectors); 865 866 outbuf[4] = 1; /* DVD-ROM, part version 1 */ 867 outbuf[5] = 0xf; /* 120mm disc, minimum rate unspecified */ 868 outbuf[6] = 1; /* one layer, read-only (per MMC-2 spec) */ 869 outbuf[7] = 0; /* default densities */ 870 871 stl_be_p(&outbuf[12], (nb_sectors >> 2) - 1); /* end sector */ 872 stl_be_p(&outbuf[16], (nb_sectors >> 2) - 1); /* l0 end sector */ 873 break; 874 } 875 876 case 0x01: /* DVD copyright information, all zeros */ 877 break; 878 879 case 0x03: /* BCA information - invalid field for no BCA info */ 880 return -1; 881 882 case 0x04: /* DVD disc manufacturing information, all zeros */ 883 break; 884 885 case 0xff: { /* List capabilities */ 886 int i; 887 size = 4; 888 for (i = 0; i < ARRAY_SIZE(rds_caps_size); i++) { 889 if (!rds_caps_size[i]) { 890 continue; 891 } 892 outbuf[size] = i; 893 outbuf[size + 1] = 0x40; /* Not writable, readable */ 894 stw_be_p(&outbuf[size + 2], rds_caps_size[i]); 895 size += 4; 896 } 897 break; 898 } 899 900 default: 901 return -1; 902 } 903 904 /* Size of buffer, not including 2 byte size field */ 905 stw_be_p(outbuf, size - 2); 906 return size; 907 908 fail: 909 return -1; 910 } 911 912 static int scsi_event_status_media(SCSIDiskState *s, uint8_t *outbuf) 913 { 914 uint8_t event_code, media_status; 915 916 media_status = 0; 917 if (s->tray_open) { 918 media_status = MS_TRAY_OPEN; 919 } else if (blk_is_inserted(s->qdev.conf.blk)) { 920 media_status = MS_MEDIA_PRESENT; 921 } 922 923 /* Event notification descriptor */ 924 event_code = MEC_NO_CHANGE; 925 if (media_status != MS_TRAY_OPEN) { 926 if (s->media_event) { 927 event_code = MEC_NEW_MEDIA; 928 s->media_event = false; 929 } else if (s->eject_request) { 930 event_code = MEC_EJECT_REQUESTED; 931 s->eject_request = false; 932 } 933 } 934 935 outbuf[0] = event_code; 936 outbuf[1] = media_status; 937 938 /* These fields are reserved, just clear them. */ 939 outbuf[2] = 0; 940 outbuf[3] = 0; 941 return 4; 942 } 943 944 static int scsi_get_event_status_notification(SCSIDiskState *s, SCSIDiskReq *r, 945 uint8_t *outbuf) 946 { 947 int size; 948 uint8_t *buf = r->req.cmd.buf; 949 uint8_t notification_class_request = buf[4]; 950 if (s->qdev.type != TYPE_ROM) { 951 return -1; 952 } 953 if ((buf[1] & 1) == 0) { 954 /* asynchronous */ 955 return -1; 956 } 957 958 size = 4; 959 outbuf[0] = outbuf[1] = 0; 960 outbuf[3] = 1 << GESN_MEDIA; /* supported events */ 961 if (notification_class_request & (1 << GESN_MEDIA)) { 962 outbuf[2] = GESN_MEDIA; 963 size += scsi_event_status_media(s, &outbuf[size]); 964 } else { 965 outbuf[2] = 0x80; 966 } 967 stw_be_p(outbuf, size - 4); 968 return size; 969 } 970 971 static int scsi_get_configuration(SCSIDiskState *s, uint8_t *outbuf) 972 { 973 int current; 974 975 if (s->qdev.type != TYPE_ROM) { 976 return -1; 977 } 978 current = media_is_dvd(s) ? MMC_PROFILE_DVD_ROM : MMC_PROFILE_CD_ROM; 979 memset(outbuf, 0, 40); 980 stl_be_p(&outbuf[0], 36); /* Bytes after the data length field */ 981 stw_be_p(&outbuf[6], current); 982 /* outbuf[8] - outbuf[19]: Feature 0 - Profile list */ 983 outbuf[10] = 0x03; /* persistent, current */ 984 outbuf[11] = 8; /* two profiles */ 985 stw_be_p(&outbuf[12], MMC_PROFILE_DVD_ROM); 986 outbuf[14] = (current == MMC_PROFILE_DVD_ROM); 987 stw_be_p(&outbuf[16], MMC_PROFILE_CD_ROM); 988 outbuf[18] = (current == MMC_PROFILE_CD_ROM); 989 /* outbuf[20] - outbuf[31]: Feature 1 - Core feature */ 990 stw_be_p(&outbuf[20], 1); 991 outbuf[22] = 0x08 | 0x03; /* version 2, persistent, current */ 992 outbuf[23] = 8; 993 stl_be_p(&outbuf[24], 1); /* SCSI */ 994 outbuf[28] = 1; /* DBE = 1, mandatory */ 995 /* outbuf[32] - outbuf[39]: Feature 3 - Removable media feature */ 996 stw_be_p(&outbuf[32], 3); 997 outbuf[34] = 0x08 | 0x03; /* version 2, persistent, current */ 998 outbuf[35] = 4; 999 outbuf[36] = 0x39; /* tray, load=1, eject=1, unlocked at powerup, lock=1 */ 1000 /* TODO: Random readable, CD read, DVD read, drive serial number, 1001 power management */ 1002 return 40; 1003 } 1004 1005 static int scsi_emulate_mechanism_status(SCSIDiskState *s, uint8_t *outbuf) 1006 { 1007 if (s->qdev.type != TYPE_ROM) { 1008 return -1; 1009 } 1010 memset(outbuf, 0, 8); 1011 outbuf[5] = 1; /* CD-ROM */ 1012 return 8; 1013 } 1014 1015 static int mode_sense_page(SCSIDiskState *s, int page, uint8_t **p_outbuf, 1016 int page_control) 1017 { 1018 static const int mode_sense_valid[0x3f] = { 1019 [MODE_PAGE_HD_GEOMETRY] = (1 << TYPE_DISK), 1020 [MODE_PAGE_FLEXIBLE_DISK_GEOMETRY] = (1 << TYPE_DISK), 1021 [MODE_PAGE_CACHING] = (1 << TYPE_DISK) | (1 << TYPE_ROM), 1022 [MODE_PAGE_R_W_ERROR] = (1 << TYPE_DISK) | (1 << TYPE_ROM), 1023 [MODE_PAGE_AUDIO_CTL] = (1 << TYPE_ROM), 1024 [MODE_PAGE_CAPABILITIES] = (1 << TYPE_ROM), 1025 }; 1026 1027 uint8_t *p = *p_outbuf + 2; 1028 int length; 1029 1030 if ((mode_sense_valid[page] & (1 << s->qdev.type)) == 0) { 1031 return -1; 1032 } 1033 1034 /* 1035 * If Changeable Values are requested, a mask denoting those mode parameters 1036 * that are changeable shall be returned. As we currently don't support 1037 * parameter changes via MODE_SELECT all bits are returned set to zero. 1038 * The buffer was already menset to zero by the caller of this function. 1039 * 1040 * The offsets here are off by two compared to the descriptions in the 1041 * SCSI specs, because those include a 2-byte header. This is unfortunate, 1042 * but it is done so that offsets are consistent within our implementation 1043 * of MODE SENSE and MODE SELECT. MODE SELECT has to deal with both 1044 * 2-byte and 4-byte headers. 1045 */ 1046 switch (page) { 1047 case MODE_PAGE_HD_GEOMETRY: 1048 length = 0x16; 1049 if (page_control == 1) { /* Changeable Values */ 1050 break; 1051 } 1052 /* if a geometry hint is available, use it */ 1053 p[0] = (s->qdev.conf.cyls >> 16) & 0xff; 1054 p[1] = (s->qdev.conf.cyls >> 8) & 0xff; 1055 p[2] = s->qdev.conf.cyls & 0xff; 1056 p[3] = s->qdev.conf.heads & 0xff; 1057 /* Write precomp start cylinder, disabled */ 1058 p[4] = (s->qdev.conf.cyls >> 16) & 0xff; 1059 p[5] = (s->qdev.conf.cyls >> 8) & 0xff; 1060 p[6] = s->qdev.conf.cyls & 0xff; 1061 /* Reduced current start cylinder, disabled */ 1062 p[7] = (s->qdev.conf.cyls >> 16) & 0xff; 1063 p[8] = (s->qdev.conf.cyls >> 8) & 0xff; 1064 p[9] = s->qdev.conf.cyls & 0xff; 1065 /* Device step rate [ns], 200ns */ 1066 p[10] = 0; 1067 p[11] = 200; 1068 /* Landing zone cylinder */ 1069 p[12] = 0xff; 1070 p[13] = 0xff; 1071 p[14] = 0xff; 1072 /* Medium rotation rate [rpm], 5400 rpm */ 1073 p[18] = (5400 >> 8) & 0xff; 1074 p[19] = 5400 & 0xff; 1075 break; 1076 1077 case MODE_PAGE_FLEXIBLE_DISK_GEOMETRY: 1078 length = 0x1e; 1079 if (page_control == 1) { /* Changeable Values */ 1080 break; 1081 } 1082 /* Transfer rate [kbit/s], 5Mbit/s */ 1083 p[0] = 5000 >> 8; 1084 p[1] = 5000 & 0xff; 1085 /* if a geometry hint is available, use it */ 1086 p[2] = s->qdev.conf.heads & 0xff; 1087 p[3] = s->qdev.conf.secs & 0xff; 1088 p[4] = s->qdev.blocksize >> 8; 1089 p[6] = (s->qdev.conf.cyls >> 8) & 0xff; 1090 p[7] = s->qdev.conf.cyls & 0xff; 1091 /* Write precomp start cylinder, disabled */ 1092 p[8] = (s->qdev.conf.cyls >> 8) & 0xff; 1093 p[9] = s->qdev.conf.cyls & 0xff; 1094 /* Reduced current start cylinder, disabled */ 1095 p[10] = (s->qdev.conf.cyls >> 8) & 0xff; 1096 p[11] = s->qdev.conf.cyls & 0xff; 1097 /* Device step rate [100us], 100us */ 1098 p[12] = 0; 1099 p[13] = 1; 1100 /* Device step pulse width [us], 1us */ 1101 p[14] = 1; 1102 /* Device head settle delay [100us], 100us */ 1103 p[15] = 0; 1104 p[16] = 1; 1105 /* Motor on delay [0.1s], 0.1s */ 1106 p[17] = 1; 1107 /* Motor off delay [0.1s], 0.1s */ 1108 p[18] = 1; 1109 /* Medium rotation rate [rpm], 5400 rpm */ 1110 p[26] = (5400 >> 8) & 0xff; 1111 p[27] = 5400 & 0xff; 1112 break; 1113 1114 case MODE_PAGE_CACHING: 1115 length = 0x12; 1116 if (page_control == 1 || /* Changeable Values */ 1117 blk_enable_write_cache(s->qdev.conf.blk)) { 1118 p[0] = 4; /* WCE */ 1119 } 1120 break; 1121 1122 case MODE_PAGE_R_W_ERROR: 1123 length = 10; 1124 if (page_control == 1) { /* Changeable Values */ 1125 break; 1126 } 1127 p[0] = 0x80; /* Automatic Write Reallocation Enabled */ 1128 if (s->qdev.type == TYPE_ROM) { 1129 p[1] = 0x20; /* Read Retry Count */ 1130 } 1131 break; 1132 1133 case MODE_PAGE_AUDIO_CTL: 1134 length = 14; 1135 break; 1136 1137 case MODE_PAGE_CAPABILITIES: 1138 length = 0x14; 1139 if (page_control == 1) { /* Changeable Values */ 1140 break; 1141 } 1142 1143 p[0] = 0x3b; /* CD-R & CD-RW read */ 1144 p[1] = 0; /* Writing not supported */ 1145 p[2] = 0x7f; /* Audio, composite, digital out, 1146 mode 2 form 1&2, multi session */ 1147 p[3] = 0xff; /* CD DA, DA accurate, RW supported, 1148 RW corrected, C2 errors, ISRC, 1149 UPC, Bar code */ 1150 p[4] = 0x2d | (s->tray_locked ? 2 : 0); 1151 /* Locking supported, jumper present, eject, tray */ 1152 p[5] = 0; /* no volume & mute control, no 1153 changer */ 1154 p[6] = (50 * 176) >> 8; /* 50x read speed */ 1155 p[7] = (50 * 176) & 0xff; 1156 p[8] = 2 >> 8; /* Two volume levels */ 1157 p[9] = 2 & 0xff; 1158 p[10] = 2048 >> 8; /* 2M buffer */ 1159 p[11] = 2048 & 0xff; 1160 p[12] = (16 * 176) >> 8; /* 16x read speed current */ 1161 p[13] = (16 * 176) & 0xff; 1162 p[16] = (16 * 176) >> 8; /* 16x write speed */ 1163 p[17] = (16 * 176) & 0xff; 1164 p[18] = (16 * 176) >> 8; /* 16x write speed current */ 1165 p[19] = (16 * 176) & 0xff; 1166 break; 1167 1168 default: 1169 return -1; 1170 } 1171 1172 assert(length < 256); 1173 (*p_outbuf)[0] = page; 1174 (*p_outbuf)[1] = length; 1175 *p_outbuf += length + 2; 1176 return length + 2; 1177 } 1178 1179 static int scsi_disk_emulate_mode_sense(SCSIDiskReq *r, uint8_t *outbuf) 1180 { 1181 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 1182 uint64_t nb_sectors; 1183 bool dbd; 1184 int page, buflen, ret, page_control; 1185 uint8_t *p; 1186 uint8_t dev_specific_param; 1187 1188 dbd = (r->req.cmd.buf[1] & 0x8) != 0; 1189 page = r->req.cmd.buf[2] & 0x3f; 1190 page_control = (r->req.cmd.buf[2] & 0xc0) >> 6; 1191 DPRINTF("Mode Sense(%d) (page %d, xfer %zd, page_control %d)\n", 1192 (r->req.cmd.buf[0] == MODE_SENSE) ? 6 : 10, page, r->req.cmd.xfer, page_control); 1193 memset(outbuf, 0, r->req.cmd.xfer); 1194 p = outbuf; 1195 1196 if (s->qdev.type == TYPE_DISK) { 1197 dev_specific_param = s->features & (1 << SCSI_DISK_F_DPOFUA) ? 0x10 : 0; 1198 if (blk_is_read_only(s->qdev.conf.blk)) { 1199 dev_specific_param |= 0x80; /* Readonly. */ 1200 } 1201 } else { 1202 /* MMC prescribes that CD/DVD drives have no block descriptors, 1203 * and defines no device-specific parameter. */ 1204 dev_specific_param = 0x00; 1205 dbd = true; 1206 } 1207 1208 if (r->req.cmd.buf[0] == MODE_SENSE) { 1209 p[1] = 0; /* Default media type. */ 1210 p[2] = dev_specific_param; 1211 p[3] = 0; /* Block descriptor length. */ 1212 p += 4; 1213 } else { /* MODE_SENSE_10 */ 1214 p[2] = 0; /* Default media type. */ 1215 p[3] = dev_specific_param; 1216 p[6] = p[7] = 0; /* Block descriptor length. */ 1217 p += 8; 1218 } 1219 1220 blk_get_geometry(s->qdev.conf.blk, &nb_sectors); 1221 if (!dbd && nb_sectors) { 1222 if (r->req.cmd.buf[0] == MODE_SENSE) { 1223 outbuf[3] = 8; /* Block descriptor length */ 1224 } else { /* MODE_SENSE_10 */ 1225 outbuf[7] = 8; /* Block descriptor length */ 1226 } 1227 nb_sectors /= (s->qdev.blocksize / 512); 1228 if (nb_sectors > 0xffffff) { 1229 nb_sectors = 0; 1230 } 1231 p[0] = 0; /* media density code */ 1232 p[1] = (nb_sectors >> 16) & 0xff; 1233 p[2] = (nb_sectors >> 8) & 0xff; 1234 p[3] = nb_sectors & 0xff; 1235 p[4] = 0; /* reserved */ 1236 p[5] = 0; /* bytes 5-7 are the sector size in bytes */ 1237 p[6] = s->qdev.blocksize >> 8; 1238 p[7] = 0; 1239 p += 8; 1240 } 1241 1242 if (page_control == 3) { 1243 /* Saved Values */ 1244 scsi_check_condition(r, SENSE_CODE(SAVING_PARAMS_NOT_SUPPORTED)); 1245 return -1; 1246 } 1247 1248 if (page == 0x3f) { 1249 for (page = 0; page <= 0x3e; page++) { 1250 mode_sense_page(s, page, &p, page_control); 1251 } 1252 } else { 1253 ret = mode_sense_page(s, page, &p, page_control); 1254 if (ret == -1) { 1255 return -1; 1256 } 1257 } 1258 1259 buflen = p - outbuf; 1260 /* 1261 * The mode data length field specifies the length in bytes of the 1262 * following data that is available to be transferred. The mode data 1263 * length does not include itself. 1264 */ 1265 if (r->req.cmd.buf[0] == MODE_SENSE) { 1266 outbuf[0] = buflen - 1; 1267 } else { /* MODE_SENSE_10 */ 1268 outbuf[0] = ((buflen - 2) >> 8) & 0xff; 1269 outbuf[1] = (buflen - 2) & 0xff; 1270 } 1271 return buflen; 1272 } 1273 1274 static int scsi_disk_emulate_read_toc(SCSIRequest *req, uint8_t *outbuf) 1275 { 1276 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); 1277 int start_track, format, msf, toclen; 1278 uint64_t nb_sectors; 1279 1280 msf = req->cmd.buf[1] & 2; 1281 format = req->cmd.buf[2] & 0xf; 1282 start_track = req->cmd.buf[6]; 1283 blk_get_geometry(s->qdev.conf.blk, &nb_sectors); 1284 DPRINTF("Read TOC (track %d format %d msf %d)\n", start_track, format, msf >> 1); 1285 nb_sectors /= s->qdev.blocksize / 512; 1286 switch (format) { 1287 case 0: 1288 toclen = cdrom_read_toc(nb_sectors, outbuf, msf, start_track); 1289 break; 1290 case 1: 1291 /* multi session : only a single session defined */ 1292 toclen = 12; 1293 memset(outbuf, 0, 12); 1294 outbuf[1] = 0x0a; 1295 outbuf[2] = 0x01; 1296 outbuf[3] = 0x01; 1297 break; 1298 case 2: 1299 toclen = cdrom_read_toc_raw(nb_sectors, outbuf, msf, start_track); 1300 break; 1301 default: 1302 return -1; 1303 } 1304 return toclen; 1305 } 1306 1307 static int scsi_disk_emulate_start_stop(SCSIDiskReq *r) 1308 { 1309 SCSIRequest *req = &r->req; 1310 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); 1311 bool start = req->cmd.buf[4] & 1; 1312 bool loej = req->cmd.buf[4] & 2; /* load on start, eject on !start */ 1313 int pwrcnd = req->cmd.buf[4] & 0xf0; 1314 1315 if (pwrcnd) { 1316 /* eject/load only happens for power condition == 0 */ 1317 return 0; 1318 } 1319 1320 if ((s->features & (1 << SCSI_DISK_F_REMOVABLE)) && loej) { 1321 if (!start && !s->tray_open && s->tray_locked) { 1322 scsi_check_condition(r, 1323 blk_is_inserted(s->qdev.conf.blk) 1324 ? SENSE_CODE(ILLEGAL_REQ_REMOVAL_PREVENTED) 1325 : SENSE_CODE(NOT_READY_REMOVAL_PREVENTED)); 1326 return -1; 1327 } 1328 1329 if (s->tray_open != !start) { 1330 blk_eject(s->qdev.conf.blk, !start); 1331 s->tray_open = !start; 1332 } 1333 } 1334 return 0; 1335 } 1336 1337 static void scsi_disk_emulate_read_data(SCSIRequest *req) 1338 { 1339 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 1340 int buflen = r->iov.iov_len; 1341 1342 if (buflen) { 1343 DPRINTF("Read buf_len=%d\n", buflen); 1344 r->iov.iov_len = 0; 1345 r->started = true; 1346 scsi_req_data(&r->req, buflen); 1347 return; 1348 } 1349 1350 /* This also clears the sense buffer for REQUEST SENSE. */ 1351 scsi_req_complete(&r->req, GOOD); 1352 } 1353 1354 static int scsi_disk_check_mode_select(SCSIDiskState *s, int page, 1355 uint8_t *inbuf, int inlen) 1356 { 1357 uint8_t mode_current[SCSI_MAX_MODE_LEN]; 1358 uint8_t mode_changeable[SCSI_MAX_MODE_LEN]; 1359 uint8_t *p; 1360 int len, expected_len, changeable_len, i; 1361 1362 /* The input buffer does not include the page header, so it is 1363 * off by 2 bytes. 1364 */ 1365 expected_len = inlen + 2; 1366 if (expected_len > SCSI_MAX_MODE_LEN) { 1367 return -1; 1368 } 1369 1370 p = mode_current; 1371 memset(mode_current, 0, inlen + 2); 1372 len = mode_sense_page(s, page, &p, 0); 1373 if (len < 0 || len != expected_len) { 1374 return -1; 1375 } 1376 1377 p = mode_changeable; 1378 memset(mode_changeable, 0, inlen + 2); 1379 changeable_len = mode_sense_page(s, page, &p, 1); 1380 assert(changeable_len == len); 1381 1382 /* Check that unchangeable bits are the same as what MODE SENSE 1383 * would return. 1384 */ 1385 for (i = 2; i < len; i++) { 1386 if (((mode_current[i] ^ inbuf[i - 2]) & ~mode_changeable[i]) != 0) { 1387 return -1; 1388 } 1389 } 1390 return 0; 1391 } 1392 1393 static void scsi_disk_apply_mode_select(SCSIDiskState *s, int page, uint8_t *p) 1394 { 1395 switch (page) { 1396 case MODE_PAGE_CACHING: 1397 blk_set_enable_write_cache(s->qdev.conf.blk, (p[0] & 4) != 0); 1398 break; 1399 1400 default: 1401 break; 1402 } 1403 } 1404 1405 static int mode_select_pages(SCSIDiskReq *r, uint8_t *p, int len, bool change) 1406 { 1407 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 1408 1409 while (len > 0) { 1410 int page, subpage, page_len; 1411 1412 /* Parse both possible formats for the mode page headers. */ 1413 page = p[0] & 0x3f; 1414 if (p[0] & 0x40) { 1415 if (len < 4) { 1416 goto invalid_param_len; 1417 } 1418 subpage = p[1]; 1419 page_len = lduw_be_p(&p[2]); 1420 p += 4; 1421 len -= 4; 1422 } else { 1423 if (len < 2) { 1424 goto invalid_param_len; 1425 } 1426 subpage = 0; 1427 page_len = p[1]; 1428 p += 2; 1429 len -= 2; 1430 } 1431 1432 if (subpage) { 1433 goto invalid_param; 1434 } 1435 if (page_len > len) { 1436 goto invalid_param_len; 1437 } 1438 1439 if (!change) { 1440 if (scsi_disk_check_mode_select(s, page, p, page_len) < 0) { 1441 goto invalid_param; 1442 } 1443 } else { 1444 scsi_disk_apply_mode_select(s, page, p); 1445 } 1446 1447 p += page_len; 1448 len -= page_len; 1449 } 1450 return 0; 1451 1452 invalid_param: 1453 scsi_check_condition(r, SENSE_CODE(INVALID_PARAM)); 1454 return -1; 1455 1456 invalid_param_len: 1457 scsi_check_condition(r, SENSE_CODE(INVALID_PARAM_LEN)); 1458 return -1; 1459 } 1460 1461 static void scsi_disk_emulate_mode_select(SCSIDiskReq *r, uint8_t *inbuf) 1462 { 1463 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 1464 uint8_t *p = inbuf; 1465 int cmd = r->req.cmd.buf[0]; 1466 int len = r->req.cmd.xfer; 1467 int hdr_len = (cmd == MODE_SELECT ? 4 : 8); 1468 int bd_len; 1469 int pass; 1470 1471 /* We only support PF=1, SP=0. */ 1472 if ((r->req.cmd.buf[1] & 0x11) != 0x10) { 1473 goto invalid_field; 1474 } 1475 1476 if (len < hdr_len) { 1477 goto invalid_param_len; 1478 } 1479 1480 bd_len = (cmd == MODE_SELECT ? p[3] : lduw_be_p(&p[6])); 1481 len -= hdr_len; 1482 p += hdr_len; 1483 if (len < bd_len) { 1484 goto invalid_param_len; 1485 } 1486 if (bd_len != 0 && bd_len != 8) { 1487 goto invalid_param; 1488 } 1489 1490 len -= bd_len; 1491 p += bd_len; 1492 1493 /* Ensure no change is made if there is an error! */ 1494 for (pass = 0; pass < 2; pass++) { 1495 if (mode_select_pages(r, p, len, pass == 1) < 0) { 1496 assert(pass == 0); 1497 return; 1498 } 1499 } 1500 if (!blk_enable_write_cache(s->qdev.conf.blk)) { 1501 /* The request is used as the AIO opaque value, so add a ref. */ 1502 scsi_req_ref(&r->req); 1503 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 0, 1504 BLOCK_ACCT_FLUSH); 1505 r->req.aiocb = blk_aio_flush(s->qdev.conf.blk, scsi_aio_complete, r); 1506 return; 1507 } 1508 1509 scsi_req_complete(&r->req, GOOD); 1510 return; 1511 1512 invalid_param: 1513 scsi_check_condition(r, SENSE_CODE(INVALID_PARAM)); 1514 return; 1515 1516 invalid_param_len: 1517 scsi_check_condition(r, SENSE_CODE(INVALID_PARAM_LEN)); 1518 return; 1519 1520 invalid_field: 1521 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); 1522 } 1523 1524 static inline bool check_lba_range(SCSIDiskState *s, 1525 uint64_t sector_num, uint32_t nb_sectors) 1526 { 1527 /* 1528 * The first line tests that no overflow happens when computing the last 1529 * sector. The second line tests that the last accessed sector is in 1530 * range. 1531 * 1532 * Careful, the computations should not underflow for nb_sectors == 0, 1533 * and a 0-block read to the first LBA beyond the end of device is 1534 * valid. 1535 */ 1536 return (sector_num <= sector_num + nb_sectors && 1537 sector_num + nb_sectors <= s->qdev.max_lba + 1); 1538 } 1539 1540 typedef struct UnmapCBData { 1541 SCSIDiskReq *r; 1542 uint8_t *inbuf; 1543 int count; 1544 } UnmapCBData; 1545 1546 static void scsi_unmap_complete(void *opaque, int ret) 1547 { 1548 UnmapCBData *data = opaque; 1549 SCSIDiskReq *r = data->r; 1550 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 1551 uint64_t sector_num; 1552 uint32_t nb_sectors; 1553 1554 r->req.aiocb = NULL; 1555 if (r->req.io_canceled) { 1556 scsi_req_cancel_complete(&r->req); 1557 goto done; 1558 } 1559 1560 if (ret < 0) { 1561 if (scsi_handle_rw_error(r, -ret)) { 1562 goto done; 1563 } 1564 } 1565 1566 if (data->count > 0) { 1567 sector_num = ldq_be_p(&data->inbuf[0]); 1568 nb_sectors = ldl_be_p(&data->inbuf[8]) & 0xffffffffULL; 1569 if (!check_lba_range(s, sector_num, nb_sectors)) { 1570 scsi_check_condition(r, SENSE_CODE(LBA_OUT_OF_RANGE)); 1571 goto done; 1572 } 1573 1574 r->req.aiocb = blk_aio_discard(s->qdev.conf.blk, 1575 sector_num * (s->qdev.blocksize / 512), 1576 nb_sectors * (s->qdev.blocksize / 512), 1577 scsi_unmap_complete, data); 1578 data->count--; 1579 data->inbuf += 16; 1580 return; 1581 } 1582 1583 scsi_req_complete(&r->req, GOOD); 1584 1585 done: 1586 scsi_req_unref(&r->req); 1587 g_free(data); 1588 } 1589 1590 static void scsi_disk_emulate_unmap(SCSIDiskReq *r, uint8_t *inbuf) 1591 { 1592 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 1593 uint8_t *p = inbuf; 1594 int len = r->req.cmd.xfer; 1595 UnmapCBData *data; 1596 1597 /* Reject ANCHOR=1. */ 1598 if (r->req.cmd.buf[1] & 0x1) { 1599 goto invalid_field; 1600 } 1601 1602 if (len < 8) { 1603 goto invalid_param_len; 1604 } 1605 if (len < lduw_be_p(&p[0]) + 2) { 1606 goto invalid_param_len; 1607 } 1608 if (len < lduw_be_p(&p[2]) + 8) { 1609 goto invalid_param_len; 1610 } 1611 if (lduw_be_p(&p[2]) & 15) { 1612 goto invalid_param_len; 1613 } 1614 1615 if (blk_is_read_only(s->qdev.conf.blk)) { 1616 scsi_check_condition(r, SENSE_CODE(WRITE_PROTECTED)); 1617 return; 1618 } 1619 1620 data = g_new0(UnmapCBData, 1); 1621 data->r = r; 1622 data->inbuf = &p[8]; 1623 data->count = lduw_be_p(&p[2]) >> 4; 1624 1625 /* The matching unref is in scsi_unmap_complete, before data is freed. */ 1626 scsi_req_ref(&r->req); 1627 scsi_unmap_complete(data, 0); 1628 return; 1629 1630 invalid_param_len: 1631 scsi_check_condition(r, SENSE_CODE(INVALID_PARAM_LEN)); 1632 return; 1633 1634 invalid_field: 1635 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); 1636 } 1637 1638 typedef struct WriteSameCBData { 1639 SCSIDiskReq *r; 1640 int64_t sector; 1641 int nb_sectors; 1642 QEMUIOVector qiov; 1643 struct iovec iov; 1644 } WriteSameCBData; 1645 1646 static void scsi_write_same_complete(void *opaque, int ret) 1647 { 1648 WriteSameCBData *data = opaque; 1649 SCSIDiskReq *r = data->r; 1650 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 1651 1652 assert(r->req.aiocb != NULL); 1653 r->req.aiocb = NULL; 1654 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct); 1655 if (r->req.io_canceled) { 1656 scsi_req_cancel_complete(&r->req); 1657 goto done; 1658 } 1659 1660 if (ret < 0) { 1661 if (scsi_handle_rw_error(r, -ret)) { 1662 goto done; 1663 } 1664 } 1665 1666 data->nb_sectors -= data->iov.iov_len / 512; 1667 data->sector += data->iov.iov_len / 512; 1668 data->iov.iov_len = MIN(data->nb_sectors * 512, data->iov.iov_len); 1669 if (data->iov.iov_len) { 1670 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 1671 data->iov.iov_len, BLOCK_ACCT_WRITE); 1672 r->req.aiocb = blk_aio_writev(s->qdev.conf.blk, data->sector, 1673 &data->qiov, data->iov.iov_len / 512, 1674 scsi_write_same_complete, data); 1675 return; 1676 } 1677 1678 scsi_req_complete(&r->req, GOOD); 1679 1680 done: 1681 scsi_req_unref(&r->req); 1682 qemu_vfree(data->iov.iov_base); 1683 g_free(data); 1684 } 1685 1686 static void scsi_disk_emulate_write_same(SCSIDiskReq *r, uint8_t *inbuf) 1687 { 1688 SCSIRequest *req = &r->req; 1689 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); 1690 uint32_t nb_sectors = scsi_data_cdb_xfer(r->req.cmd.buf); 1691 WriteSameCBData *data; 1692 uint8_t *buf; 1693 int i; 1694 1695 /* Fail if PBDATA=1 or LBDATA=1 or ANCHOR=1. */ 1696 if (nb_sectors == 0 || (req->cmd.buf[1] & 0x16)) { 1697 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); 1698 return; 1699 } 1700 1701 if (blk_is_read_only(s->qdev.conf.blk)) { 1702 scsi_check_condition(r, SENSE_CODE(WRITE_PROTECTED)); 1703 return; 1704 } 1705 if (!check_lba_range(s, r->req.cmd.lba, nb_sectors)) { 1706 scsi_check_condition(r, SENSE_CODE(LBA_OUT_OF_RANGE)); 1707 return; 1708 } 1709 1710 if (buffer_is_zero(inbuf, s->qdev.blocksize)) { 1711 int flags = (req->cmd.buf[1] & 0x8) ? BDRV_REQ_MAY_UNMAP : 0; 1712 1713 /* The request is used as the AIO opaque value, so add a ref. */ 1714 scsi_req_ref(&r->req); 1715 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 1716 nb_sectors * s->qdev.blocksize, 1717 BLOCK_ACCT_WRITE); 1718 r->req.aiocb = blk_aio_write_zeroes(s->qdev.conf.blk, 1719 r->req.cmd.lba * (s->qdev.blocksize / 512), 1720 nb_sectors * (s->qdev.blocksize / 512), 1721 flags, scsi_aio_complete, r); 1722 return; 1723 } 1724 1725 data = g_new0(WriteSameCBData, 1); 1726 data->r = r; 1727 data->sector = r->req.cmd.lba * (s->qdev.blocksize / 512); 1728 data->nb_sectors = nb_sectors * (s->qdev.blocksize / 512); 1729 data->iov.iov_len = MIN(data->nb_sectors * 512, SCSI_WRITE_SAME_MAX); 1730 data->iov.iov_base = buf = blk_blockalign(s->qdev.conf.blk, 1731 data->iov.iov_len); 1732 qemu_iovec_init_external(&data->qiov, &data->iov, 1); 1733 1734 for (i = 0; i < data->iov.iov_len; i += s->qdev.blocksize) { 1735 memcpy(&buf[i], inbuf, s->qdev.blocksize); 1736 } 1737 1738 scsi_req_ref(&r->req); 1739 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 1740 data->iov.iov_len, BLOCK_ACCT_WRITE); 1741 r->req.aiocb = blk_aio_writev(s->qdev.conf.blk, data->sector, 1742 &data->qiov, data->iov.iov_len / 512, 1743 scsi_write_same_complete, data); 1744 } 1745 1746 static void scsi_disk_emulate_write_data(SCSIRequest *req) 1747 { 1748 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 1749 1750 if (r->iov.iov_len) { 1751 int buflen = r->iov.iov_len; 1752 DPRINTF("Write buf_len=%d\n", buflen); 1753 r->iov.iov_len = 0; 1754 scsi_req_data(&r->req, buflen); 1755 return; 1756 } 1757 1758 switch (req->cmd.buf[0]) { 1759 case MODE_SELECT: 1760 case MODE_SELECT_10: 1761 /* This also clears the sense buffer for REQUEST SENSE. */ 1762 scsi_disk_emulate_mode_select(r, r->iov.iov_base); 1763 break; 1764 1765 case UNMAP: 1766 scsi_disk_emulate_unmap(r, r->iov.iov_base); 1767 break; 1768 1769 case VERIFY_10: 1770 case VERIFY_12: 1771 case VERIFY_16: 1772 if (r->req.status == -1) { 1773 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); 1774 } 1775 break; 1776 1777 case WRITE_SAME_10: 1778 case WRITE_SAME_16: 1779 scsi_disk_emulate_write_same(r, r->iov.iov_base); 1780 break; 1781 1782 default: 1783 abort(); 1784 } 1785 } 1786 1787 static int32_t scsi_disk_emulate_command(SCSIRequest *req, uint8_t *buf) 1788 { 1789 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 1790 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); 1791 uint64_t nb_sectors; 1792 uint8_t *outbuf; 1793 int buflen; 1794 1795 switch (req->cmd.buf[0]) { 1796 case INQUIRY: 1797 case MODE_SENSE: 1798 case MODE_SENSE_10: 1799 case RESERVE: 1800 case RESERVE_10: 1801 case RELEASE: 1802 case RELEASE_10: 1803 case START_STOP: 1804 case ALLOW_MEDIUM_REMOVAL: 1805 case GET_CONFIGURATION: 1806 case GET_EVENT_STATUS_NOTIFICATION: 1807 case MECHANISM_STATUS: 1808 case REQUEST_SENSE: 1809 break; 1810 1811 default: 1812 if (s->tray_open || !blk_is_inserted(s->qdev.conf.blk)) { 1813 scsi_check_condition(r, SENSE_CODE(NO_MEDIUM)); 1814 return 0; 1815 } 1816 break; 1817 } 1818 1819 /* 1820 * FIXME: we shouldn't return anything bigger than 4k, but the code 1821 * requires the buffer to be as big as req->cmd.xfer in several 1822 * places. So, do not allow CDBs with a very large ALLOCATION 1823 * LENGTH. The real fix would be to modify scsi_read_data and 1824 * dma_buf_read, so that they return data beyond the buflen 1825 * as all zeros. 1826 */ 1827 if (req->cmd.xfer > 65536) { 1828 goto illegal_request; 1829 } 1830 r->buflen = MAX(4096, req->cmd.xfer); 1831 1832 if (!r->iov.iov_base) { 1833 r->iov.iov_base = blk_blockalign(s->qdev.conf.blk, r->buflen); 1834 } 1835 1836 buflen = req->cmd.xfer; 1837 outbuf = r->iov.iov_base; 1838 memset(outbuf, 0, r->buflen); 1839 switch (req->cmd.buf[0]) { 1840 case TEST_UNIT_READY: 1841 assert(!s->tray_open && blk_is_inserted(s->qdev.conf.blk)); 1842 break; 1843 case INQUIRY: 1844 buflen = scsi_disk_emulate_inquiry(req, outbuf); 1845 if (buflen < 0) { 1846 goto illegal_request; 1847 } 1848 break; 1849 case MODE_SENSE: 1850 case MODE_SENSE_10: 1851 buflen = scsi_disk_emulate_mode_sense(r, outbuf); 1852 if (buflen < 0) { 1853 goto illegal_request; 1854 } 1855 break; 1856 case READ_TOC: 1857 buflen = scsi_disk_emulate_read_toc(req, outbuf); 1858 if (buflen < 0) { 1859 goto illegal_request; 1860 } 1861 break; 1862 case RESERVE: 1863 if (req->cmd.buf[1] & 1) { 1864 goto illegal_request; 1865 } 1866 break; 1867 case RESERVE_10: 1868 if (req->cmd.buf[1] & 3) { 1869 goto illegal_request; 1870 } 1871 break; 1872 case RELEASE: 1873 if (req->cmd.buf[1] & 1) { 1874 goto illegal_request; 1875 } 1876 break; 1877 case RELEASE_10: 1878 if (req->cmd.buf[1] & 3) { 1879 goto illegal_request; 1880 } 1881 break; 1882 case START_STOP: 1883 if (scsi_disk_emulate_start_stop(r) < 0) { 1884 return 0; 1885 } 1886 break; 1887 case ALLOW_MEDIUM_REMOVAL: 1888 s->tray_locked = req->cmd.buf[4] & 1; 1889 blk_lock_medium(s->qdev.conf.blk, req->cmd.buf[4] & 1); 1890 break; 1891 case READ_CAPACITY_10: 1892 /* The normal LEN field for this command is zero. */ 1893 memset(outbuf, 0, 8); 1894 blk_get_geometry(s->qdev.conf.blk, &nb_sectors); 1895 if (!nb_sectors) { 1896 scsi_check_condition(r, SENSE_CODE(LUN_NOT_READY)); 1897 return 0; 1898 } 1899 if ((req->cmd.buf[8] & 1) == 0 && req->cmd.lba) { 1900 goto illegal_request; 1901 } 1902 nb_sectors /= s->qdev.blocksize / 512; 1903 /* Returned value is the address of the last sector. */ 1904 nb_sectors--; 1905 /* Remember the new size for read/write sanity checking. */ 1906 s->qdev.max_lba = nb_sectors; 1907 /* Clip to 2TB, instead of returning capacity modulo 2TB. */ 1908 if (nb_sectors > UINT32_MAX) { 1909 nb_sectors = UINT32_MAX; 1910 } 1911 outbuf[0] = (nb_sectors >> 24) & 0xff; 1912 outbuf[1] = (nb_sectors >> 16) & 0xff; 1913 outbuf[2] = (nb_sectors >> 8) & 0xff; 1914 outbuf[3] = nb_sectors & 0xff; 1915 outbuf[4] = 0; 1916 outbuf[5] = 0; 1917 outbuf[6] = s->qdev.blocksize >> 8; 1918 outbuf[7] = 0; 1919 break; 1920 case REQUEST_SENSE: 1921 /* Just return "NO SENSE". */ 1922 buflen = scsi_build_sense(NULL, 0, outbuf, r->buflen, 1923 (req->cmd.buf[1] & 1) == 0); 1924 if (buflen < 0) { 1925 goto illegal_request; 1926 } 1927 break; 1928 case MECHANISM_STATUS: 1929 buflen = scsi_emulate_mechanism_status(s, outbuf); 1930 if (buflen < 0) { 1931 goto illegal_request; 1932 } 1933 break; 1934 case GET_CONFIGURATION: 1935 buflen = scsi_get_configuration(s, outbuf); 1936 if (buflen < 0) { 1937 goto illegal_request; 1938 } 1939 break; 1940 case GET_EVENT_STATUS_NOTIFICATION: 1941 buflen = scsi_get_event_status_notification(s, r, outbuf); 1942 if (buflen < 0) { 1943 goto illegal_request; 1944 } 1945 break; 1946 case READ_DISC_INFORMATION: 1947 buflen = scsi_read_disc_information(s, r, outbuf); 1948 if (buflen < 0) { 1949 goto illegal_request; 1950 } 1951 break; 1952 case READ_DVD_STRUCTURE: 1953 buflen = scsi_read_dvd_structure(s, r, outbuf); 1954 if (buflen < 0) { 1955 goto illegal_request; 1956 } 1957 break; 1958 case SERVICE_ACTION_IN_16: 1959 /* Service Action In subcommands. */ 1960 if ((req->cmd.buf[1] & 31) == SAI_READ_CAPACITY_16) { 1961 DPRINTF("SAI READ CAPACITY(16)\n"); 1962 memset(outbuf, 0, req->cmd.xfer); 1963 blk_get_geometry(s->qdev.conf.blk, &nb_sectors); 1964 if (!nb_sectors) { 1965 scsi_check_condition(r, SENSE_CODE(LUN_NOT_READY)); 1966 return 0; 1967 } 1968 if ((req->cmd.buf[14] & 1) == 0 && req->cmd.lba) { 1969 goto illegal_request; 1970 } 1971 nb_sectors /= s->qdev.blocksize / 512; 1972 /* Returned value is the address of the last sector. */ 1973 nb_sectors--; 1974 /* Remember the new size for read/write sanity checking. */ 1975 s->qdev.max_lba = nb_sectors; 1976 outbuf[0] = (nb_sectors >> 56) & 0xff; 1977 outbuf[1] = (nb_sectors >> 48) & 0xff; 1978 outbuf[2] = (nb_sectors >> 40) & 0xff; 1979 outbuf[3] = (nb_sectors >> 32) & 0xff; 1980 outbuf[4] = (nb_sectors >> 24) & 0xff; 1981 outbuf[5] = (nb_sectors >> 16) & 0xff; 1982 outbuf[6] = (nb_sectors >> 8) & 0xff; 1983 outbuf[7] = nb_sectors & 0xff; 1984 outbuf[8] = 0; 1985 outbuf[9] = 0; 1986 outbuf[10] = s->qdev.blocksize >> 8; 1987 outbuf[11] = 0; 1988 outbuf[12] = 0; 1989 outbuf[13] = get_physical_block_exp(&s->qdev.conf); 1990 1991 /* set TPE bit if the format supports discard */ 1992 if (s->qdev.conf.discard_granularity) { 1993 outbuf[14] = 0x80; 1994 } 1995 1996 /* Protection, exponent and lowest lba field left blank. */ 1997 break; 1998 } 1999 DPRINTF("Unsupported Service Action In\n"); 2000 goto illegal_request; 2001 case SYNCHRONIZE_CACHE: 2002 /* The request is used as the AIO opaque value, so add a ref. */ 2003 scsi_req_ref(&r->req); 2004 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 0, 2005 BLOCK_ACCT_FLUSH); 2006 r->req.aiocb = blk_aio_flush(s->qdev.conf.blk, scsi_aio_complete, r); 2007 return 0; 2008 case SEEK_10: 2009 DPRINTF("Seek(10) (sector %" PRId64 ")\n", r->req.cmd.lba); 2010 if (r->req.cmd.lba > s->qdev.max_lba) { 2011 goto illegal_lba; 2012 } 2013 break; 2014 case MODE_SELECT: 2015 DPRINTF("Mode Select(6) (len %lu)\n", (long)r->req.cmd.xfer); 2016 break; 2017 case MODE_SELECT_10: 2018 DPRINTF("Mode Select(10) (len %lu)\n", (long)r->req.cmd.xfer); 2019 break; 2020 case UNMAP: 2021 DPRINTF("Unmap (len %lu)\n", (long)r->req.cmd.xfer); 2022 break; 2023 case VERIFY_10: 2024 case VERIFY_12: 2025 case VERIFY_16: 2026 DPRINTF("Verify (bytchk %d)\n", (req->cmd.buf[1] >> 1) & 3); 2027 if (req->cmd.buf[1] & 6) { 2028 goto illegal_request; 2029 } 2030 break; 2031 case WRITE_SAME_10: 2032 case WRITE_SAME_16: 2033 DPRINTF("WRITE SAME %d (len %lu)\n", 2034 req->cmd.buf[0] == WRITE_SAME_10 ? 10 : 16, 2035 (long)r->req.cmd.xfer); 2036 break; 2037 default: 2038 DPRINTF("Unknown SCSI command (%2.2x=%s)\n", buf[0], 2039 scsi_command_name(buf[0])); 2040 scsi_check_condition(r, SENSE_CODE(INVALID_OPCODE)); 2041 return 0; 2042 } 2043 assert(!r->req.aiocb); 2044 r->iov.iov_len = MIN(r->buflen, req->cmd.xfer); 2045 if (r->iov.iov_len == 0) { 2046 scsi_req_complete(&r->req, GOOD); 2047 } 2048 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) { 2049 assert(r->iov.iov_len == req->cmd.xfer); 2050 return -r->iov.iov_len; 2051 } else { 2052 return r->iov.iov_len; 2053 } 2054 2055 illegal_request: 2056 if (r->req.status == -1) { 2057 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); 2058 } 2059 return 0; 2060 2061 illegal_lba: 2062 scsi_check_condition(r, SENSE_CODE(LBA_OUT_OF_RANGE)); 2063 return 0; 2064 } 2065 2066 /* Execute a scsi command. Returns the length of the data expected by the 2067 command. This will be Positive for data transfers from the device 2068 (eg. disk reads), negative for transfers to the device (eg. disk writes), 2069 and zero if the command does not transfer any data. */ 2070 2071 static int32_t scsi_disk_dma_command(SCSIRequest *req, uint8_t *buf) 2072 { 2073 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 2074 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); 2075 uint32_t len; 2076 uint8_t command; 2077 2078 command = buf[0]; 2079 2080 if (s->tray_open || !blk_is_inserted(s->qdev.conf.blk)) { 2081 scsi_check_condition(r, SENSE_CODE(NO_MEDIUM)); 2082 return 0; 2083 } 2084 2085 len = scsi_data_cdb_xfer(r->req.cmd.buf); 2086 switch (command) { 2087 case READ_6: 2088 case READ_10: 2089 case READ_12: 2090 case READ_16: 2091 DPRINTF("Read (sector %" PRId64 ", count %u)\n", r->req.cmd.lba, len); 2092 if (r->req.cmd.buf[1] & 0xe0) { 2093 goto illegal_request; 2094 } 2095 if (!check_lba_range(s, r->req.cmd.lba, len)) { 2096 goto illegal_lba; 2097 } 2098 r->sector = r->req.cmd.lba * (s->qdev.blocksize / 512); 2099 r->sector_count = len * (s->qdev.blocksize / 512); 2100 break; 2101 case WRITE_6: 2102 case WRITE_10: 2103 case WRITE_12: 2104 case WRITE_16: 2105 case WRITE_VERIFY_10: 2106 case WRITE_VERIFY_12: 2107 case WRITE_VERIFY_16: 2108 if (blk_is_read_only(s->qdev.conf.blk)) { 2109 scsi_check_condition(r, SENSE_CODE(WRITE_PROTECTED)); 2110 return 0; 2111 } 2112 DPRINTF("Write %s(sector %" PRId64 ", count %u)\n", 2113 (command & 0xe) == 0xe ? "And Verify " : "", 2114 r->req.cmd.lba, len); 2115 if (r->req.cmd.buf[1] & 0xe0) { 2116 goto illegal_request; 2117 } 2118 if (!check_lba_range(s, r->req.cmd.lba, len)) { 2119 goto illegal_lba; 2120 } 2121 r->sector = r->req.cmd.lba * (s->qdev.blocksize / 512); 2122 r->sector_count = len * (s->qdev.blocksize / 512); 2123 break; 2124 default: 2125 abort(); 2126 illegal_request: 2127 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); 2128 return 0; 2129 illegal_lba: 2130 scsi_check_condition(r, SENSE_CODE(LBA_OUT_OF_RANGE)); 2131 return 0; 2132 } 2133 if (r->sector_count == 0) { 2134 scsi_req_complete(&r->req, GOOD); 2135 } 2136 assert(r->iov.iov_len == 0); 2137 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) { 2138 return -r->sector_count * 512; 2139 } else { 2140 return r->sector_count * 512; 2141 } 2142 } 2143 2144 static void scsi_disk_reset(DeviceState *dev) 2145 { 2146 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev.qdev, dev); 2147 uint64_t nb_sectors; 2148 2149 scsi_device_purge_requests(&s->qdev, SENSE_CODE(RESET)); 2150 2151 blk_get_geometry(s->qdev.conf.blk, &nb_sectors); 2152 nb_sectors /= s->qdev.blocksize / 512; 2153 if (nb_sectors) { 2154 nb_sectors--; 2155 } 2156 s->qdev.max_lba = nb_sectors; 2157 /* reset tray statuses */ 2158 s->tray_locked = 0; 2159 s->tray_open = 0; 2160 } 2161 2162 static void scsi_disk_resize_cb(void *opaque) 2163 { 2164 SCSIDiskState *s = opaque; 2165 2166 /* SPC lists this sense code as available only for 2167 * direct-access devices. 2168 */ 2169 if (s->qdev.type == TYPE_DISK) { 2170 scsi_device_report_change(&s->qdev, SENSE_CODE(CAPACITY_CHANGED)); 2171 } 2172 } 2173 2174 static void scsi_cd_change_media_cb(void *opaque, bool load) 2175 { 2176 SCSIDiskState *s = opaque; 2177 2178 /* 2179 * When a CD gets changed, we have to report an ejected state and 2180 * then a loaded state to guests so that they detect tray 2181 * open/close and media change events. Guests that do not use 2182 * GET_EVENT_STATUS_NOTIFICATION to detect such tray open/close 2183 * states rely on this behavior. 2184 * 2185 * media_changed governs the state machine used for unit attention 2186 * report. media_event is used by GET EVENT STATUS NOTIFICATION. 2187 */ 2188 s->media_changed = load; 2189 s->tray_open = !load; 2190 scsi_device_set_ua(&s->qdev, SENSE_CODE(UNIT_ATTENTION_NO_MEDIUM)); 2191 s->media_event = true; 2192 s->eject_request = false; 2193 } 2194 2195 static void scsi_cd_eject_request_cb(void *opaque, bool force) 2196 { 2197 SCSIDiskState *s = opaque; 2198 2199 s->eject_request = true; 2200 if (force) { 2201 s->tray_locked = false; 2202 } 2203 } 2204 2205 static bool scsi_cd_is_tray_open(void *opaque) 2206 { 2207 return ((SCSIDiskState *)opaque)->tray_open; 2208 } 2209 2210 static bool scsi_cd_is_medium_locked(void *opaque) 2211 { 2212 return ((SCSIDiskState *)opaque)->tray_locked; 2213 } 2214 2215 static const BlockDevOps scsi_disk_removable_block_ops = { 2216 .change_media_cb = scsi_cd_change_media_cb, 2217 .eject_request_cb = scsi_cd_eject_request_cb, 2218 .is_tray_open = scsi_cd_is_tray_open, 2219 .is_medium_locked = scsi_cd_is_medium_locked, 2220 2221 .resize_cb = scsi_disk_resize_cb, 2222 }; 2223 2224 static const BlockDevOps scsi_disk_block_ops = { 2225 .resize_cb = scsi_disk_resize_cb, 2226 }; 2227 2228 static void scsi_disk_unit_attention_reported(SCSIDevice *dev) 2229 { 2230 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); 2231 if (s->media_changed) { 2232 s->media_changed = false; 2233 scsi_device_set_ua(&s->qdev, SENSE_CODE(MEDIUM_CHANGED)); 2234 } 2235 } 2236 2237 static void scsi_realize(SCSIDevice *dev, Error **errp) 2238 { 2239 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); 2240 Error *err = NULL; 2241 2242 if (!s->qdev.conf.blk) { 2243 error_setg(errp, "drive property not set"); 2244 return; 2245 } 2246 2247 if (!(s->features & (1 << SCSI_DISK_F_REMOVABLE)) && 2248 !blk_is_inserted(s->qdev.conf.blk)) { 2249 error_setg(errp, "Device needs media, but drive is empty"); 2250 return; 2251 } 2252 2253 blkconf_serial(&s->qdev.conf, &s->serial); 2254 if (dev->type == TYPE_DISK) { 2255 blkconf_geometry(&dev->conf, NULL, 65535, 255, 255, &err); 2256 if (err) { 2257 error_propagate(errp, err); 2258 return; 2259 } 2260 } 2261 2262 if (s->qdev.conf.discard_granularity == -1) { 2263 s->qdev.conf.discard_granularity = 2264 MAX(s->qdev.conf.logical_block_size, DEFAULT_DISCARD_GRANULARITY); 2265 } 2266 2267 if (!s->version) { 2268 s->version = g_strdup(qemu_get_version()); 2269 } 2270 if (!s->vendor) { 2271 s->vendor = g_strdup("QEMU"); 2272 } 2273 2274 if (blk_is_sg(s->qdev.conf.blk)) { 2275 error_setg(errp, "unwanted /dev/sg*"); 2276 return; 2277 } 2278 2279 if ((s->features & (1 << SCSI_DISK_F_REMOVABLE)) && 2280 !(s->features & (1 << SCSI_DISK_F_NO_REMOVABLE_DEVOPS))) { 2281 blk_set_dev_ops(s->qdev.conf.blk, &scsi_disk_removable_block_ops, s); 2282 } else { 2283 blk_set_dev_ops(s->qdev.conf.blk, &scsi_disk_block_ops, s); 2284 } 2285 blk_set_guest_block_size(s->qdev.conf.blk, s->qdev.blocksize); 2286 2287 blk_iostatus_enable(s->qdev.conf.blk); 2288 } 2289 2290 static void scsi_hd_realize(SCSIDevice *dev, Error **errp) 2291 { 2292 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); 2293 s->qdev.blocksize = s->qdev.conf.logical_block_size; 2294 s->qdev.type = TYPE_DISK; 2295 if (!s->product) { 2296 s->product = g_strdup("QEMU HARDDISK"); 2297 } 2298 scsi_realize(&s->qdev, errp); 2299 } 2300 2301 static void scsi_cd_realize(SCSIDevice *dev, Error **errp) 2302 { 2303 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); 2304 s->qdev.blocksize = 2048; 2305 s->qdev.type = TYPE_ROM; 2306 s->features |= 1 << SCSI_DISK_F_REMOVABLE; 2307 if (!s->product) { 2308 s->product = g_strdup("QEMU CD-ROM"); 2309 } 2310 scsi_realize(&s->qdev, errp); 2311 } 2312 2313 static void scsi_disk_realize(SCSIDevice *dev, Error **errp) 2314 { 2315 DriveInfo *dinfo; 2316 Error *local_err = NULL; 2317 2318 if (!dev->conf.blk) { 2319 scsi_realize(dev, &local_err); 2320 assert(local_err); 2321 error_propagate(errp, local_err); 2322 return; 2323 } 2324 2325 dinfo = blk_legacy_dinfo(dev->conf.blk); 2326 if (dinfo && dinfo->media_cd) { 2327 scsi_cd_realize(dev, errp); 2328 } else { 2329 scsi_hd_realize(dev, errp); 2330 } 2331 } 2332 2333 static const SCSIReqOps scsi_disk_emulate_reqops = { 2334 .size = sizeof(SCSIDiskReq), 2335 .free_req = scsi_free_request, 2336 .send_command = scsi_disk_emulate_command, 2337 .read_data = scsi_disk_emulate_read_data, 2338 .write_data = scsi_disk_emulate_write_data, 2339 .get_buf = scsi_get_buf, 2340 }; 2341 2342 static const SCSIReqOps scsi_disk_dma_reqops = { 2343 .size = sizeof(SCSIDiskReq), 2344 .free_req = scsi_free_request, 2345 .send_command = scsi_disk_dma_command, 2346 .read_data = scsi_read_data, 2347 .write_data = scsi_write_data, 2348 .get_buf = scsi_get_buf, 2349 .load_request = scsi_disk_load_request, 2350 .save_request = scsi_disk_save_request, 2351 }; 2352 2353 static const SCSIReqOps *const scsi_disk_reqops_dispatch[256] = { 2354 [TEST_UNIT_READY] = &scsi_disk_emulate_reqops, 2355 [INQUIRY] = &scsi_disk_emulate_reqops, 2356 [MODE_SENSE] = &scsi_disk_emulate_reqops, 2357 [MODE_SENSE_10] = &scsi_disk_emulate_reqops, 2358 [START_STOP] = &scsi_disk_emulate_reqops, 2359 [ALLOW_MEDIUM_REMOVAL] = &scsi_disk_emulate_reqops, 2360 [READ_CAPACITY_10] = &scsi_disk_emulate_reqops, 2361 [READ_TOC] = &scsi_disk_emulate_reqops, 2362 [READ_DVD_STRUCTURE] = &scsi_disk_emulate_reqops, 2363 [READ_DISC_INFORMATION] = &scsi_disk_emulate_reqops, 2364 [GET_CONFIGURATION] = &scsi_disk_emulate_reqops, 2365 [GET_EVENT_STATUS_NOTIFICATION] = &scsi_disk_emulate_reqops, 2366 [MECHANISM_STATUS] = &scsi_disk_emulate_reqops, 2367 [SERVICE_ACTION_IN_16] = &scsi_disk_emulate_reqops, 2368 [REQUEST_SENSE] = &scsi_disk_emulate_reqops, 2369 [SYNCHRONIZE_CACHE] = &scsi_disk_emulate_reqops, 2370 [SEEK_10] = &scsi_disk_emulate_reqops, 2371 [MODE_SELECT] = &scsi_disk_emulate_reqops, 2372 [MODE_SELECT_10] = &scsi_disk_emulate_reqops, 2373 [UNMAP] = &scsi_disk_emulate_reqops, 2374 [WRITE_SAME_10] = &scsi_disk_emulate_reqops, 2375 [WRITE_SAME_16] = &scsi_disk_emulate_reqops, 2376 [VERIFY_10] = &scsi_disk_emulate_reqops, 2377 [VERIFY_12] = &scsi_disk_emulate_reqops, 2378 [VERIFY_16] = &scsi_disk_emulate_reqops, 2379 2380 [READ_6] = &scsi_disk_dma_reqops, 2381 [READ_10] = &scsi_disk_dma_reqops, 2382 [READ_12] = &scsi_disk_dma_reqops, 2383 [READ_16] = &scsi_disk_dma_reqops, 2384 [WRITE_6] = &scsi_disk_dma_reqops, 2385 [WRITE_10] = &scsi_disk_dma_reqops, 2386 [WRITE_12] = &scsi_disk_dma_reqops, 2387 [WRITE_16] = &scsi_disk_dma_reqops, 2388 [WRITE_VERIFY_10] = &scsi_disk_dma_reqops, 2389 [WRITE_VERIFY_12] = &scsi_disk_dma_reqops, 2390 [WRITE_VERIFY_16] = &scsi_disk_dma_reqops, 2391 }; 2392 2393 static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun, 2394 uint8_t *buf, void *hba_private) 2395 { 2396 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); 2397 SCSIRequest *req; 2398 const SCSIReqOps *ops; 2399 uint8_t command; 2400 2401 command = buf[0]; 2402 ops = scsi_disk_reqops_dispatch[command]; 2403 if (!ops) { 2404 ops = &scsi_disk_emulate_reqops; 2405 } 2406 req = scsi_req_alloc(ops, &s->qdev, tag, lun, hba_private); 2407 2408 #ifdef DEBUG_SCSI 2409 DPRINTF("Command: lun=%d tag=0x%x data=0x%02x", lun, tag, buf[0]); 2410 { 2411 int i; 2412 for (i = 1; i < scsi_cdb_length(buf); i++) { 2413 printf(" 0x%02x", buf[i]); 2414 } 2415 printf("\n"); 2416 } 2417 #endif 2418 2419 return req; 2420 } 2421 2422 #ifdef __linux__ 2423 static int get_device_type(SCSIDiskState *s) 2424 { 2425 uint8_t cmd[16]; 2426 uint8_t buf[36]; 2427 uint8_t sensebuf[8]; 2428 sg_io_hdr_t io_header; 2429 int ret; 2430 2431 memset(cmd, 0, sizeof(cmd)); 2432 memset(buf, 0, sizeof(buf)); 2433 cmd[0] = INQUIRY; 2434 cmd[4] = sizeof(buf); 2435 2436 memset(&io_header, 0, sizeof(io_header)); 2437 io_header.interface_id = 'S'; 2438 io_header.dxfer_direction = SG_DXFER_FROM_DEV; 2439 io_header.dxfer_len = sizeof(buf); 2440 io_header.dxferp = buf; 2441 io_header.cmdp = cmd; 2442 io_header.cmd_len = sizeof(cmd); 2443 io_header.mx_sb_len = sizeof(sensebuf); 2444 io_header.sbp = sensebuf; 2445 io_header.timeout = 6000; /* XXX */ 2446 2447 ret = blk_ioctl(s->qdev.conf.blk, SG_IO, &io_header); 2448 if (ret < 0 || io_header.driver_status || io_header.host_status) { 2449 return -1; 2450 } 2451 s->qdev.type = buf[0]; 2452 if (buf[1] & 0x80) { 2453 s->features |= 1 << SCSI_DISK_F_REMOVABLE; 2454 } 2455 return 0; 2456 } 2457 2458 static void scsi_block_realize(SCSIDevice *dev, Error **errp) 2459 { 2460 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); 2461 int sg_version; 2462 int rc; 2463 2464 if (!s->qdev.conf.blk) { 2465 error_setg(errp, "drive property not set"); 2466 return; 2467 } 2468 2469 /* check we are using a driver managing SG_IO (version 3 and after) */ 2470 rc = blk_ioctl(s->qdev.conf.blk, SG_GET_VERSION_NUM, &sg_version); 2471 if (rc < 0) { 2472 error_setg(errp, "cannot get SG_IO version number: %s. " 2473 "Is this a SCSI device?", 2474 strerror(-rc)); 2475 return; 2476 } 2477 if (sg_version < 30000) { 2478 error_setg(errp, "scsi generic interface too old"); 2479 return; 2480 } 2481 2482 /* get device type from INQUIRY data */ 2483 rc = get_device_type(s); 2484 if (rc < 0) { 2485 error_setg(errp, "INQUIRY failed"); 2486 return; 2487 } 2488 2489 /* Make a guess for the block size, we'll fix it when the guest sends. 2490 * READ CAPACITY. If they don't, they likely would assume these sizes 2491 * anyway. (TODO: check in /sys). 2492 */ 2493 if (s->qdev.type == TYPE_ROM || s->qdev.type == TYPE_WORM) { 2494 s->qdev.blocksize = 2048; 2495 } else { 2496 s->qdev.blocksize = 512; 2497 } 2498 2499 /* Makes the scsi-block device not removable by using HMP and QMP eject 2500 * command. 2501 */ 2502 s->features |= (1 << SCSI_DISK_F_NO_REMOVABLE_DEVOPS); 2503 2504 scsi_realize(&s->qdev, errp); 2505 } 2506 2507 static bool scsi_block_is_passthrough(SCSIDiskState *s, uint8_t *buf) 2508 { 2509 switch (buf[0]) { 2510 case READ_6: 2511 case READ_10: 2512 case READ_12: 2513 case READ_16: 2514 case VERIFY_10: 2515 case VERIFY_12: 2516 case VERIFY_16: 2517 case WRITE_6: 2518 case WRITE_10: 2519 case WRITE_12: 2520 case WRITE_16: 2521 case WRITE_VERIFY_10: 2522 case WRITE_VERIFY_12: 2523 case WRITE_VERIFY_16: 2524 /* If we are not using O_DIRECT, we might read stale data from the 2525 * host cache if writes were made using other commands than these 2526 * ones (such as WRITE SAME or EXTENDED COPY, etc.). So, without 2527 * O_DIRECT everything must go through SG_IO. 2528 */ 2529 if (!(blk_get_flags(s->qdev.conf.blk) & BDRV_O_NOCACHE)) { 2530 break; 2531 } 2532 2533 /* MMC writing cannot be done via pread/pwrite, because it sometimes 2534 * involves writing beyond the maximum LBA or to negative LBA (lead-in). 2535 * And once you do these writes, reading from the block device is 2536 * unreliable, too. It is even possible that reads deliver random data 2537 * from the host page cache (this is probably a Linux bug). 2538 * 2539 * We might use scsi_disk_dma_reqops as long as no writing commands are 2540 * seen, but performance usually isn't paramount on optical media. So, 2541 * just make scsi-block operate the same as scsi-generic for them. 2542 */ 2543 if (s->qdev.type != TYPE_ROM) { 2544 return false; 2545 } 2546 break; 2547 2548 default: 2549 break; 2550 } 2551 2552 return true; 2553 } 2554 2555 2556 static SCSIRequest *scsi_block_new_request(SCSIDevice *d, uint32_t tag, 2557 uint32_t lun, uint8_t *buf, 2558 void *hba_private) 2559 { 2560 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); 2561 2562 if (scsi_block_is_passthrough(s, buf)) { 2563 return scsi_req_alloc(&scsi_generic_req_ops, &s->qdev, tag, lun, 2564 hba_private); 2565 } else { 2566 return scsi_req_alloc(&scsi_disk_dma_reqops, &s->qdev, tag, lun, 2567 hba_private); 2568 } 2569 } 2570 2571 static int scsi_block_parse_cdb(SCSIDevice *d, SCSICommand *cmd, 2572 uint8_t *buf, void *hba_private) 2573 { 2574 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); 2575 2576 if (scsi_block_is_passthrough(s, buf)) { 2577 return scsi_bus_parse_cdb(&s->qdev, cmd, buf, hba_private); 2578 } else { 2579 return scsi_req_parse_cdb(&s->qdev, cmd, buf); 2580 } 2581 } 2582 2583 #endif 2584 2585 #define DEFINE_SCSI_DISK_PROPERTIES() \ 2586 DEFINE_BLOCK_PROPERTIES(SCSIDiskState, qdev.conf), \ 2587 DEFINE_PROP_STRING("ver", SCSIDiskState, version), \ 2588 DEFINE_PROP_STRING("serial", SCSIDiskState, serial), \ 2589 DEFINE_PROP_STRING("vendor", SCSIDiskState, vendor), \ 2590 DEFINE_PROP_STRING("product", SCSIDiskState, product) 2591 2592 static Property scsi_hd_properties[] = { 2593 DEFINE_SCSI_DISK_PROPERTIES(), 2594 DEFINE_PROP_BIT("removable", SCSIDiskState, features, 2595 SCSI_DISK_F_REMOVABLE, false), 2596 DEFINE_PROP_BIT("dpofua", SCSIDiskState, features, 2597 SCSI_DISK_F_DPOFUA, false), 2598 DEFINE_PROP_UINT64("wwn", SCSIDiskState, wwn, 0), 2599 DEFINE_PROP_UINT64("port_wwn", SCSIDiskState, port_wwn, 0), 2600 DEFINE_PROP_UINT16("port_index", SCSIDiskState, port_index, 0), 2601 DEFINE_PROP_UINT64("max_unmap_size", SCSIDiskState, max_unmap_size, 2602 DEFAULT_MAX_UNMAP_SIZE), 2603 DEFINE_PROP_UINT64("max_io_size", SCSIDiskState, max_io_size, 2604 DEFAULT_MAX_IO_SIZE), 2605 DEFINE_BLOCK_CHS_PROPERTIES(SCSIDiskState, qdev.conf), 2606 DEFINE_PROP_END_OF_LIST(), 2607 }; 2608 2609 static const VMStateDescription vmstate_scsi_disk_state = { 2610 .name = "scsi-disk", 2611 .version_id = 1, 2612 .minimum_version_id = 1, 2613 .fields = (VMStateField[]) { 2614 VMSTATE_SCSI_DEVICE(qdev, SCSIDiskState), 2615 VMSTATE_BOOL(media_changed, SCSIDiskState), 2616 VMSTATE_BOOL(media_event, SCSIDiskState), 2617 VMSTATE_BOOL(eject_request, SCSIDiskState), 2618 VMSTATE_BOOL(tray_open, SCSIDiskState), 2619 VMSTATE_BOOL(tray_locked, SCSIDiskState), 2620 VMSTATE_END_OF_LIST() 2621 } 2622 }; 2623 2624 static void scsi_hd_class_initfn(ObjectClass *klass, void *data) 2625 { 2626 DeviceClass *dc = DEVICE_CLASS(klass); 2627 SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass); 2628 2629 sc->realize = scsi_hd_realize; 2630 sc->alloc_req = scsi_new_request; 2631 sc->unit_attention_reported = scsi_disk_unit_attention_reported; 2632 dc->fw_name = "disk"; 2633 dc->desc = "virtual SCSI disk"; 2634 dc->reset = scsi_disk_reset; 2635 dc->props = scsi_hd_properties; 2636 dc->vmsd = &vmstate_scsi_disk_state; 2637 } 2638 2639 static const TypeInfo scsi_hd_info = { 2640 .name = "scsi-hd", 2641 .parent = TYPE_SCSI_DEVICE, 2642 .instance_size = sizeof(SCSIDiskState), 2643 .class_init = scsi_hd_class_initfn, 2644 }; 2645 2646 static Property scsi_cd_properties[] = { 2647 DEFINE_SCSI_DISK_PROPERTIES(), 2648 DEFINE_PROP_UINT64("wwn", SCSIDiskState, wwn, 0), 2649 DEFINE_PROP_UINT64("port_wwn", SCSIDiskState, port_wwn, 0), 2650 DEFINE_PROP_UINT16("port_index", SCSIDiskState, port_index, 0), 2651 DEFINE_PROP_UINT64("max_io_size", SCSIDiskState, max_io_size, 2652 DEFAULT_MAX_IO_SIZE), 2653 DEFINE_PROP_END_OF_LIST(), 2654 }; 2655 2656 static void scsi_cd_class_initfn(ObjectClass *klass, void *data) 2657 { 2658 DeviceClass *dc = DEVICE_CLASS(klass); 2659 SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass); 2660 2661 sc->realize = scsi_cd_realize; 2662 sc->alloc_req = scsi_new_request; 2663 sc->unit_attention_reported = scsi_disk_unit_attention_reported; 2664 dc->fw_name = "disk"; 2665 dc->desc = "virtual SCSI CD-ROM"; 2666 dc->reset = scsi_disk_reset; 2667 dc->props = scsi_cd_properties; 2668 dc->vmsd = &vmstate_scsi_disk_state; 2669 } 2670 2671 static const TypeInfo scsi_cd_info = { 2672 .name = "scsi-cd", 2673 .parent = TYPE_SCSI_DEVICE, 2674 .instance_size = sizeof(SCSIDiskState), 2675 .class_init = scsi_cd_class_initfn, 2676 }; 2677 2678 #ifdef __linux__ 2679 static Property scsi_block_properties[] = { 2680 DEFINE_PROP_DRIVE("drive", SCSIDiskState, qdev.conf.blk), 2681 DEFINE_PROP_END_OF_LIST(), 2682 }; 2683 2684 static void scsi_block_class_initfn(ObjectClass *klass, void *data) 2685 { 2686 DeviceClass *dc = DEVICE_CLASS(klass); 2687 SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass); 2688 2689 sc->realize = scsi_block_realize; 2690 sc->alloc_req = scsi_block_new_request; 2691 sc->parse_cdb = scsi_block_parse_cdb; 2692 dc->fw_name = "disk"; 2693 dc->desc = "SCSI block device passthrough"; 2694 dc->reset = scsi_disk_reset; 2695 dc->props = scsi_block_properties; 2696 dc->vmsd = &vmstate_scsi_disk_state; 2697 } 2698 2699 static const TypeInfo scsi_block_info = { 2700 .name = "scsi-block", 2701 .parent = TYPE_SCSI_DEVICE, 2702 .instance_size = sizeof(SCSIDiskState), 2703 .class_init = scsi_block_class_initfn, 2704 }; 2705 #endif 2706 2707 static Property scsi_disk_properties[] = { 2708 DEFINE_SCSI_DISK_PROPERTIES(), 2709 DEFINE_PROP_BIT("removable", SCSIDiskState, features, 2710 SCSI_DISK_F_REMOVABLE, false), 2711 DEFINE_PROP_BIT("dpofua", SCSIDiskState, features, 2712 SCSI_DISK_F_DPOFUA, false), 2713 DEFINE_PROP_UINT64("wwn", SCSIDiskState, wwn, 0), 2714 DEFINE_PROP_UINT64("port_wwn", SCSIDiskState, port_wwn, 0), 2715 DEFINE_PROP_UINT16("port_index", SCSIDiskState, port_index, 0), 2716 DEFINE_PROP_UINT64("max_unmap_size", SCSIDiskState, max_unmap_size, 2717 DEFAULT_MAX_UNMAP_SIZE), 2718 DEFINE_PROP_UINT64("max_io_size", SCSIDiskState, max_io_size, 2719 DEFAULT_MAX_IO_SIZE), 2720 DEFINE_PROP_END_OF_LIST(), 2721 }; 2722 2723 static void scsi_disk_class_initfn(ObjectClass *klass, void *data) 2724 { 2725 DeviceClass *dc = DEVICE_CLASS(klass); 2726 SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass); 2727 2728 sc->realize = scsi_disk_realize; 2729 sc->alloc_req = scsi_new_request; 2730 sc->unit_attention_reported = scsi_disk_unit_attention_reported; 2731 dc->fw_name = "disk"; 2732 dc->desc = "virtual SCSI disk or CD-ROM (legacy)"; 2733 dc->reset = scsi_disk_reset; 2734 dc->props = scsi_disk_properties; 2735 dc->vmsd = &vmstate_scsi_disk_state; 2736 } 2737 2738 static const TypeInfo scsi_disk_info = { 2739 .name = "scsi-disk", 2740 .parent = TYPE_SCSI_DEVICE, 2741 .instance_size = sizeof(SCSIDiskState), 2742 .class_init = scsi_disk_class_initfn, 2743 }; 2744 2745 static void scsi_disk_register_types(void) 2746 { 2747 type_register_static(&scsi_hd_info); 2748 type_register_static(&scsi_cd_info); 2749 #ifdef __linux__ 2750 type_register_static(&scsi_block_info); 2751 #endif 2752 type_register_static(&scsi_disk_info); 2753 } 2754 2755 type_init(scsi_disk_register_types) 2756