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 #include "qemu/osdep.h" 23 #include "qemu/units.h" 24 #include "qapi/error.h" 25 #include "qemu/error-report.h" 26 #include "qemu/main-loop.h" 27 #include "qemu/module.h" 28 #include "qemu/hw-version.h" 29 #include "qemu/memalign.h" 30 #include "hw/scsi/scsi.h" 31 #include "migration/qemu-file-types.h" 32 #include "migration/vmstate.h" 33 #include "hw/scsi/emulation.h" 34 #include "scsi/constants.h" 35 #include "sysemu/block-backend.h" 36 #include "sysemu/blockdev.h" 37 #include "hw/block/block.h" 38 #include "hw/qdev-properties.h" 39 #include "hw/qdev-properties-system.h" 40 #include "sysemu/dma.h" 41 #include "sysemu/sysemu.h" 42 #include "qemu/cutils.h" 43 #include "trace.h" 44 #include "qom/object.h" 45 46 #ifdef __linux 47 #include <scsi/sg.h> 48 #endif 49 50 #define SCSI_WRITE_SAME_MAX (512 * KiB) 51 #define SCSI_DMA_BUF_SIZE (128 * KiB) 52 #define SCSI_MAX_INQUIRY_LEN 256 53 #define SCSI_MAX_MODE_LEN 256 54 55 #define DEFAULT_DISCARD_GRANULARITY (4 * KiB) 56 #define DEFAULT_MAX_UNMAP_SIZE (1 * GiB) 57 #define DEFAULT_MAX_IO_SIZE INT_MAX /* 2 GB - 1 block */ 58 59 #define TYPE_SCSI_DISK_BASE "scsi-disk-base" 60 61 OBJECT_DECLARE_TYPE(SCSIDiskState, SCSIDiskClass, SCSI_DISK_BASE) 62 63 struct SCSIDiskClass { 64 SCSIDeviceClass parent_class; 65 DMAIOFunc *dma_readv; 66 DMAIOFunc *dma_writev; 67 bool (*need_fua_emulation)(SCSICommand *cmd); 68 void (*update_sense)(SCSIRequest *r); 69 }; 70 71 typedef struct SCSIDiskReq { 72 SCSIRequest req; 73 /* Both sector and sector_count are in terms of BDRV_SECTOR_SIZE bytes. */ 74 uint64_t sector; 75 uint32_t sector_count; 76 uint32_t buflen; 77 bool started; 78 bool need_fua_emulation; 79 struct iovec iov; 80 QEMUIOVector qiov; 81 BlockAcctCookie acct; 82 } SCSIDiskReq; 83 84 #define SCSI_DISK_F_REMOVABLE 0 85 #define SCSI_DISK_F_DPOFUA 1 86 #define SCSI_DISK_F_NO_REMOVABLE_DEVOPS 2 87 88 struct SCSIDiskState { 89 SCSIDevice qdev; 90 uint32_t features; 91 bool media_changed; 92 bool media_event; 93 bool eject_request; 94 uint16_t port_index; 95 uint64_t max_unmap_size; 96 uint64_t max_io_size; 97 uint32_t quirks; 98 QEMUBH *bh; 99 char *version; 100 char *serial; 101 char *vendor; 102 char *product; 103 char *device_id; 104 bool tray_open; 105 bool tray_locked; 106 /* 107 * 0x0000 - rotation rate not reported 108 * 0x0001 - non-rotating medium (SSD) 109 * 0x0002-0x0400 - reserved 110 * 0x0401-0xffe - rotations per minute 111 * 0xffff - reserved 112 */ 113 uint16_t rotation_rate; 114 }; 115 116 static void scsi_free_request(SCSIRequest *req) 117 { 118 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 119 120 qemu_vfree(r->iov.iov_base); 121 } 122 123 /* Helper function for command completion with sense. */ 124 static void scsi_check_condition(SCSIDiskReq *r, SCSISense sense) 125 { 126 trace_scsi_disk_check_condition(r->req.tag, sense.key, sense.asc, 127 sense.ascq); 128 scsi_req_build_sense(&r->req, sense); 129 scsi_req_complete(&r->req, CHECK_CONDITION); 130 } 131 132 static void scsi_init_iovec(SCSIDiskReq *r, size_t size) 133 { 134 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 135 136 if (!r->iov.iov_base) { 137 r->buflen = size; 138 r->iov.iov_base = blk_blockalign(s->qdev.conf.blk, r->buflen); 139 } 140 r->iov.iov_len = MIN(r->sector_count * BDRV_SECTOR_SIZE, r->buflen); 141 qemu_iovec_init_external(&r->qiov, &r->iov, 1); 142 } 143 144 static void scsi_disk_save_request(QEMUFile *f, SCSIRequest *req) 145 { 146 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 147 148 qemu_put_be64s(f, &r->sector); 149 qemu_put_be32s(f, &r->sector_count); 150 qemu_put_be32s(f, &r->buflen); 151 if (r->buflen) { 152 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) { 153 qemu_put_buffer(f, r->iov.iov_base, r->iov.iov_len); 154 } else if (!req->retry) { 155 uint32_t len = r->iov.iov_len; 156 qemu_put_be32s(f, &len); 157 qemu_put_buffer(f, r->iov.iov_base, r->iov.iov_len); 158 } 159 } 160 } 161 162 static void scsi_disk_load_request(QEMUFile *f, SCSIRequest *req) 163 { 164 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 165 166 qemu_get_be64s(f, &r->sector); 167 qemu_get_be32s(f, &r->sector_count); 168 qemu_get_be32s(f, &r->buflen); 169 if (r->buflen) { 170 scsi_init_iovec(r, r->buflen); 171 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) { 172 qemu_get_buffer(f, r->iov.iov_base, r->iov.iov_len); 173 } else if (!r->req.retry) { 174 uint32_t len; 175 qemu_get_be32s(f, &len); 176 r->iov.iov_len = len; 177 assert(r->iov.iov_len <= r->buflen); 178 qemu_get_buffer(f, r->iov.iov_base, r->iov.iov_len); 179 } 180 } 181 182 qemu_iovec_init_external(&r->qiov, &r->iov, 1); 183 } 184 185 /* 186 * scsi_handle_rw_error has two return values. False means that the error 187 * must be ignored, true means that the error has been processed and the 188 * caller should not do anything else for this request. Note that 189 * scsi_handle_rw_error always manages its reference counts, independent 190 * of the return value. 191 */ 192 static bool scsi_handle_rw_error(SCSIDiskReq *r, int ret, bool acct_failed) 193 { 194 bool is_read = (r->req.cmd.mode == SCSI_XFER_FROM_DEV); 195 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 196 SCSIDiskClass *sdc = (SCSIDiskClass *) object_get_class(OBJECT(s)); 197 SCSISense sense = SENSE_CODE(NO_SENSE); 198 int error = 0; 199 bool req_has_sense = false; 200 BlockErrorAction action; 201 int status; 202 203 if (ret < 0) { 204 status = scsi_sense_from_errno(-ret, &sense); 205 error = -ret; 206 } else { 207 /* A passthrough command has completed with nonzero status. */ 208 status = ret; 209 if (status == CHECK_CONDITION) { 210 req_has_sense = true; 211 error = scsi_sense_buf_to_errno(r->req.sense, sizeof(r->req.sense)); 212 } else { 213 error = EINVAL; 214 } 215 } 216 217 /* 218 * Check whether the error has to be handled by the guest or should 219 * rather follow the rerror=/werror= settings. Guest-handled errors 220 * are usually retried immediately, so do not post them to QMP and 221 * do not account them as failed I/O. 222 */ 223 if (req_has_sense && 224 scsi_sense_buf_is_guest_recoverable(r->req.sense, sizeof(r->req.sense))) { 225 action = BLOCK_ERROR_ACTION_REPORT; 226 acct_failed = false; 227 } else { 228 action = blk_get_error_action(s->qdev.conf.blk, is_read, error); 229 blk_error_action(s->qdev.conf.blk, action, is_read, error); 230 } 231 232 switch (action) { 233 case BLOCK_ERROR_ACTION_REPORT: 234 if (acct_failed) { 235 block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct); 236 } 237 if (req_has_sense) { 238 sdc->update_sense(&r->req); 239 } else if (status == CHECK_CONDITION) { 240 scsi_req_build_sense(&r->req, sense); 241 } 242 scsi_req_complete(&r->req, status); 243 return true; 244 245 case BLOCK_ERROR_ACTION_IGNORE: 246 return false; 247 248 case BLOCK_ERROR_ACTION_STOP: 249 scsi_req_retry(&r->req); 250 return true; 251 252 default: 253 g_assert_not_reached(); 254 } 255 } 256 257 static bool scsi_disk_req_check_error(SCSIDiskReq *r, int ret, bool acct_failed) 258 { 259 if (r->req.io_canceled) { 260 scsi_req_cancel_complete(&r->req); 261 return true; 262 } 263 264 if (ret < 0) { 265 return scsi_handle_rw_error(r, ret, acct_failed); 266 } 267 268 return false; 269 } 270 271 static void scsi_aio_complete(void *opaque, int ret) 272 { 273 SCSIDiskReq *r = (SCSIDiskReq *)opaque; 274 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 275 276 aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk)); 277 278 assert(r->req.aiocb != NULL); 279 r->req.aiocb = NULL; 280 281 if (scsi_disk_req_check_error(r, ret, true)) { 282 goto done; 283 } 284 285 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct); 286 scsi_req_complete(&r->req, GOOD); 287 288 done: 289 aio_context_release(blk_get_aio_context(s->qdev.conf.blk)); 290 scsi_req_unref(&r->req); 291 } 292 293 static bool scsi_is_cmd_fua(SCSICommand *cmd) 294 { 295 switch (cmd->buf[0]) { 296 case READ_10: 297 case READ_12: 298 case READ_16: 299 case WRITE_10: 300 case WRITE_12: 301 case WRITE_16: 302 return (cmd->buf[1] & 8) != 0; 303 304 case VERIFY_10: 305 case VERIFY_12: 306 case VERIFY_16: 307 case WRITE_VERIFY_10: 308 case WRITE_VERIFY_12: 309 case WRITE_VERIFY_16: 310 return true; 311 312 case READ_6: 313 case WRITE_6: 314 default: 315 return false; 316 } 317 } 318 319 static void scsi_write_do_fua(SCSIDiskReq *r) 320 { 321 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 322 323 assert(r->req.aiocb == NULL); 324 assert(!r->req.io_canceled); 325 326 if (r->need_fua_emulation) { 327 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 0, 328 BLOCK_ACCT_FLUSH); 329 r->req.aiocb = blk_aio_flush(s->qdev.conf.blk, scsi_aio_complete, r); 330 return; 331 } 332 333 scsi_req_complete(&r->req, GOOD); 334 scsi_req_unref(&r->req); 335 } 336 337 static void scsi_dma_complete_noio(SCSIDiskReq *r, int ret) 338 { 339 assert(r->req.aiocb == NULL); 340 if (scsi_disk_req_check_error(r, ret, false)) { 341 goto done; 342 } 343 344 r->sector += r->sector_count; 345 r->sector_count = 0; 346 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) { 347 scsi_write_do_fua(r); 348 return; 349 } else { 350 scsi_req_complete(&r->req, GOOD); 351 } 352 353 done: 354 scsi_req_unref(&r->req); 355 } 356 357 /* Called with AioContext lock held */ 358 static void scsi_dma_complete(void *opaque, int ret) 359 { 360 SCSIDiskReq *r = (SCSIDiskReq *)opaque; 361 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 362 363 assert(r->req.aiocb != NULL); 364 r->req.aiocb = NULL; 365 366 if (ret < 0) { 367 block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct); 368 } else { 369 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct); 370 } 371 scsi_dma_complete_noio(r, ret); 372 } 373 374 static void scsi_read_complete_noio(SCSIDiskReq *r, int ret) 375 { 376 uint32_t n; 377 378 assert(r->req.aiocb == NULL); 379 if (scsi_disk_req_check_error(r, ret, false)) { 380 goto done; 381 } 382 383 n = r->qiov.size / BDRV_SECTOR_SIZE; 384 r->sector += n; 385 r->sector_count -= n; 386 scsi_req_data(&r->req, r->qiov.size); 387 388 done: 389 scsi_req_unref(&r->req); 390 } 391 392 static void scsi_read_complete(void *opaque, int ret) 393 { 394 SCSIDiskReq *r = (SCSIDiskReq *)opaque; 395 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 396 397 aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk)); 398 399 assert(r->req.aiocb != NULL); 400 r->req.aiocb = NULL; 401 402 if (ret < 0) { 403 block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct); 404 } else { 405 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct); 406 trace_scsi_disk_read_complete(r->req.tag, r->qiov.size); 407 } 408 scsi_read_complete_noio(r, ret); 409 aio_context_release(blk_get_aio_context(s->qdev.conf.blk)); 410 } 411 412 /* Actually issue a read to the block device. */ 413 static void scsi_do_read(SCSIDiskReq *r, int ret) 414 { 415 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 416 SCSIDiskClass *sdc = (SCSIDiskClass *) object_get_class(OBJECT(s)); 417 418 assert (r->req.aiocb == NULL); 419 if (scsi_disk_req_check_error(r, ret, false)) { 420 goto done; 421 } 422 423 /* The request is used as the AIO opaque value, so add a ref. */ 424 scsi_req_ref(&r->req); 425 426 if (r->req.sg) { 427 dma_acct_start(s->qdev.conf.blk, &r->acct, r->req.sg, BLOCK_ACCT_READ); 428 r->req.residual -= r->req.sg->size; 429 r->req.aiocb = dma_blk_io(blk_get_aio_context(s->qdev.conf.blk), 430 r->req.sg, r->sector << BDRV_SECTOR_BITS, 431 BDRV_SECTOR_SIZE, 432 sdc->dma_readv, r, scsi_dma_complete, r, 433 DMA_DIRECTION_FROM_DEVICE); 434 } else { 435 scsi_init_iovec(r, SCSI_DMA_BUF_SIZE); 436 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 437 r->qiov.size, BLOCK_ACCT_READ); 438 r->req.aiocb = sdc->dma_readv(r->sector << BDRV_SECTOR_BITS, &r->qiov, 439 scsi_read_complete, r, r); 440 } 441 442 done: 443 scsi_req_unref(&r->req); 444 } 445 446 static void scsi_do_read_cb(void *opaque, int ret) 447 { 448 SCSIDiskReq *r = (SCSIDiskReq *)opaque; 449 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 450 451 aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk)); 452 453 assert (r->req.aiocb != NULL); 454 r->req.aiocb = NULL; 455 456 if (ret < 0) { 457 block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct); 458 } else { 459 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct); 460 } 461 scsi_do_read(opaque, ret); 462 aio_context_release(blk_get_aio_context(s->qdev.conf.blk)); 463 } 464 465 /* Read more data from scsi device into buffer. */ 466 static void scsi_read_data(SCSIRequest *req) 467 { 468 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 469 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 470 bool first; 471 472 trace_scsi_disk_read_data_count(r->sector_count); 473 if (r->sector_count == 0) { 474 /* This also clears the sense buffer for REQUEST SENSE. */ 475 scsi_req_complete(&r->req, GOOD); 476 return; 477 } 478 479 /* No data transfer may already be in progress */ 480 assert(r->req.aiocb == NULL); 481 482 /* The request is used as the AIO opaque value, so add a ref. */ 483 scsi_req_ref(&r->req); 484 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) { 485 trace_scsi_disk_read_data_invalid(); 486 scsi_read_complete_noio(r, -EINVAL); 487 return; 488 } 489 490 if (!blk_is_available(req->dev->conf.blk)) { 491 scsi_read_complete_noio(r, -ENOMEDIUM); 492 return; 493 } 494 495 first = !r->started; 496 r->started = true; 497 if (first && r->need_fua_emulation) { 498 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 0, 499 BLOCK_ACCT_FLUSH); 500 r->req.aiocb = blk_aio_flush(s->qdev.conf.blk, scsi_do_read_cb, r); 501 } else { 502 scsi_do_read(r, 0); 503 } 504 } 505 506 static void scsi_write_complete_noio(SCSIDiskReq *r, int ret) 507 { 508 uint32_t n; 509 510 assert (r->req.aiocb == NULL); 511 if (scsi_disk_req_check_error(r, ret, false)) { 512 goto done; 513 } 514 515 n = r->qiov.size / BDRV_SECTOR_SIZE; 516 r->sector += n; 517 r->sector_count -= n; 518 if (r->sector_count == 0) { 519 scsi_write_do_fua(r); 520 return; 521 } else { 522 scsi_init_iovec(r, SCSI_DMA_BUF_SIZE); 523 trace_scsi_disk_write_complete_noio(r->req.tag, r->qiov.size); 524 scsi_req_data(&r->req, r->qiov.size); 525 } 526 527 done: 528 scsi_req_unref(&r->req); 529 } 530 531 static void scsi_write_complete(void * opaque, int ret) 532 { 533 SCSIDiskReq *r = (SCSIDiskReq *)opaque; 534 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 535 536 aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk)); 537 538 assert (r->req.aiocb != NULL); 539 r->req.aiocb = NULL; 540 541 if (ret < 0) { 542 block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct); 543 } else { 544 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct); 545 } 546 scsi_write_complete_noio(r, ret); 547 aio_context_release(blk_get_aio_context(s->qdev.conf.blk)); 548 } 549 550 static void scsi_write_data(SCSIRequest *req) 551 { 552 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 553 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 554 SCSIDiskClass *sdc = (SCSIDiskClass *) object_get_class(OBJECT(s)); 555 556 /* No data transfer may already be in progress */ 557 assert(r->req.aiocb == NULL); 558 559 /* The request is used as the AIO opaque value, so add a ref. */ 560 scsi_req_ref(&r->req); 561 if (r->req.cmd.mode != SCSI_XFER_TO_DEV) { 562 trace_scsi_disk_write_data_invalid(); 563 scsi_write_complete_noio(r, -EINVAL); 564 return; 565 } 566 567 if (!r->req.sg && !r->qiov.size) { 568 /* Called for the first time. Ask the driver to send us more data. */ 569 r->started = true; 570 scsi_write_complete_noio(r, 0); 571 return; 572 } 573 if (!blk_is_available(req->dev->conf.blk)) { 574 scsi_write_complete_noio(r, -ENOMEDIUM); 575 return; 576 } 577 578 if (r->req.cmd.buf[0] == VERIFY_10 || r->req.cmd.buf[0] == VERIFY_12 || 579 r->req.cmd.buf[0] == VERIFY_16) { 580 if (r->req.sg) { 581 scsi_dma_complete_noio(r, 0); 582 } else { 583 scsi_write_complete_noio(r, 0); 584 } 585 return; 586 } 587 588 if (r->req.sg) { 589 dma_acct_start(s->qdev.conf.blk, &r->acct, r->req.sg, BLOCK_ACCT_WRITE); 590 r->req.residual -= r->req.sg->size; 591 r->req.aiocb = dma_blk_io(blk_get_aio_context(s->qdev.conf.blk), 592 r->req.sg, r->sector << BDRV_SECTOR_BITS, 593 BDRV_SECTOR_SIZE, 594 sdc->dma_writev, r, scsi_dma_complete, r, 595 DMA_DIRECTION_TO_DEVICE); 596 } else { 597 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 598 r->qiov.size, BLOCK_ACCT_WRITE); 599 r->req.aiocb = sdc->dma_writev(r->sector << BDRV_SECTOR_BITS, &r->qiov, 600 scsi_write_complete, r, r); 601 } 602 } 603 604 /* Return a pointer to the data buffer. */ 605 static uint8_t *scsi_get_buf(SCSIRequest *req) 606 { 607 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 608 609 return (uint8_t *)r->iov.iov_base; 610 } 611 612 static int scsi_disk_emulate_vpd_page(SCSIRequest *req, uint8_t *outbuf) 613 { 614 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); 615 uint8_t page_code = req->cmd.buf[2]; 616 int start, buflen = 0; 617 618 outbuf[buflen++] = s->qdev.type & 0x1f; 619 outbuf[buflen++] = page_code; 620 outbuf[buflen++] = 0x00; 621 outbuf[buflen++] = 0x00; 622 start = buflen; 623 624 switch (page_code) { 625 case 0x00: /* Supported page codes, mandatory */ 626 { 627 trace_scsi_disk_emulate_vpd_page_00(req->cmd.xfer); 628 outbuf[buflen++] = 0x00; /* list of supported pages (this page) */ 629 if (s->serial) { 630 outbuf[buflen++] = 0x80; /* unit serial number */ 631 } 632 outbuf[buflen++] = 0x83; /* device identification */ 633 if (s->qdev.type == TYPE_DISK) { 634 outbuf[buflen++] = 0xb0; /* block limits */ 635 outbuf[buflen++] = 0xb1; /* block device characteristics */ 636 outbuf[buflen++] = 0xb2; /* thin provisioning */ 637 } 638 break; 639 } 640 case 0x80: /* Device serial number, optional */ 641 { 642 int l; 643 644 if (!s->serial) { 645 trace_scsi_disk_emulate_vpd_page_80_not_supported(); 646 return -1; 647 } 648 649 l = strlen(s->serial); 650 if (l > 36) { 651 l = 36; 652 } 653 654 trace_scsi_disk_emulate_vpd_page_80(req->cmd.xfer); 655 memcpy(outbuf + buflen, s->serial, l); 656 buflen += l; 657 break; 658 } 659 660 case 0x83: /* Device identification page, mandatory */ 661 { 662 int id_len = s->device_id ? MIN(strlen(s->device_id), 255 - 8) : 0; 663 664 trace_scsi_disk_emulate_vpd_page_83(req->cmd.xfer); 665 666 if (id_len) { 667 outbuf[buflen++] = 0x2; /* ASCII */ 668 outbuf[buflen++] = 0; /* not officially assigned */ 669 outbuf[buflen++] = 0; /* reserved */ 670 outbuf[buflen++] = id_len; /* length of data following */ 671 memcpy(outbuf + buflen, s->device_id, id_len); 672 buflen += id_len; 673 } 674 675 if (s->qdev.wwn) { 676 outbuf[buflen++] = 0x1; /* Binary */ 677 outbuf[buflen++] = 0x3; /* NAA */ 678 outbuf[buflen++] = 0; /* reserved */ 679 outbuf[buflen++] = 8; 680 stq_be_p(&outbuf[buflen], s->qdev.wwn); 681 buflen += 8; 682 } 683 684 if (s->qdev.port_wwn) { 685 outbuf[buflen++] = 0x61; /* SAS / Binary */ 686 outbuf[buflen++] = 0x93; /* PIV / Target port / NAA */ 687 outbuf[buflen++] = 0; /* reserved */ 688 outbuf[buflen++] = 8; 689 stq_be_p(&outbuf[buflen], s->qdev.port_wwn); 690 buflen += 8; 691 } 692 693 if (s->port_index) { 694 outbuf[buflen++] = 0x61; /* SAS / Binary */ 695 696 /* PIV/Target port/relative target port */ 697 outbuf[buflen++] = 0x94; 698 699 outbuf[buflen++] = 0; /* reserved */ 700 outbuf[buflen++] = 4; 701 stw_be_p(&outbuf[buflen + 2], s->port_index); 702 buflen += 4; 703 } 704 break; 705 } 706 case 0xb0: /* block limits */ 707 { 708 SCSIBlockLimits bl = {}; 709 710 if (s->qdev.type == TYPE_ROM) { 711 trace_scsi_disk_emulate_vpd_page_b0_not_supported(); 712 return -1; 713 } 714 bl.wsnz = 1; 715 bl.unmap_sectors = 716 s->qdev.conf.discard_granularity / s->qdev.blocksize; 717 bl.min_io_size = 718 s->qdev.conf.min_io_size / s->qdev.blocksize; 719 bl.opt_io_size = 720 s->qdev.conf.opt_io_size / s->qdev.blocksize; 721 bl.max_unmap_sectors = 722 s->max_unmap_size / s->qdev.blocksize; 723 bl.max_io_sectors = 724 s->max_io_size / s->qdev.blocksize; 725 /* 255 descriptors fit in 4 KiB with an 8-byte header */ 726 bl.max_unmap_descr = 255; 727 728 if (s->qdev.type == TYPE_DISK) { 729 int max_transfer_blk = blk_get_max_transfer(s->qdev.conf.blk); 730 int max_io_sectors_blk = 731 max_transfer_blk / s->qdev.blocksize; 732 733 bl.max_io_sectors = 734 MIN_NON_ZERO(max_io_sectors_blk, bl.max_io_sectors); 735 } 736 buflen += scsi_emulate_block_limits(outbuf + buflen, &bl); 737 break; 738 } 739 case 0xb1: /* block device characteristics */ 740 { 741 buflen = 0x40; 742 outbuf[4] = (s->rotation_rate >> 8) & 0xff; 743 outbuf[5] = s->rotation_rate & 0xff; 744 outbuf[6] = 0; /* PRODUCT TYPE */ 745 outbuf[7] = 0; /* WABEREQ | WACEREQ | NOMINAL FORM FACTOR */ 746 outbuf[8] = 0; /* VBULS */ 747 break; 748 } 749 case 0xb2: /* thin provisioning */ 750 { 751 buflen = 8; 752 outbuf[4] = 0; 753 outbuf[5] = 0xe0; /* unmap & write_same 10/16 all supported */ 754 outbuf[6] = s->qdev.conf.discard_granularity ? 2 : 1; 755 outbuf[7] = 0; 756 break; 757 } 758 default: 759 return -1; 760 } 761 /* done with EVPD */ 762 assert(buflen - start <= 255); 763 outbuf[start - 1] = buflen - start; 764 return buflen; 765 } 766 767 static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf) 768 { 769 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); 770 int buflen = 0; 771 772 if (req->cmd.buf[1] & 0x1) { 773 /* Vital product data */ 774 return scsi_disk_emulate_vpd_page(req, outbuf); 775 } 776 777 /* Standard INQUIRY data */ 778 if (req->cmd.buf[2] != 0) { 779 return -1; 780 } 781 782 /* PAGE CODE == 0 */ 783 buflen = req->cmd.xfer; 784 if (buflen > SCSI_MAX_INQUIRY_LEN) { 785 buflen = SCSI_MAX_INQUIRY_LEN; 786 } 787 788 outbuf[0] = s->qdev.type & 0x1f; 789 outbuf[1] = (s->features & (1 << SCSI_DISK_F_REMOVABLE)) ? 0x80 : 0; 790 791 strpadcpy((char *) &outbuf[16], 16, s->product, ' '); 792 strpadcpy((char *) &outbuf[8], 8, s->vendor, ' '); 793 794 memset(&outbuf[32], 0, 4); 795 memcpy(&outbuf[32], s->version, MIN(4, strlen(s->version))); 796 /* 797 * We claim conformance to SPC-3, which is required for guests 798 * to ask for modern features like READ CAPACITY(16) or the 799 * block characteristics VPD page by default. Not all of SPC-3 800 * is actually implemented, but we're good enough. 801 */ 802 outbuf[2] = s->qdev.default_scsi_version; 803 outbuf[3] = 2 | 0x10; /* Format 2, HiSup */ 804 805 if (buflen > 36) { 806 outbuf[4] = buflen - 5; /* Additional Length = (Len - 1) - 4 */ 807 } else { 808 /* If the allocation length of CDB is too small, 809 the additional length is not adjusted */ 810 outbuf[4] = 36 - 5; 811 } 812 813 /* Sync data transfer and TCQ. */ 814 outbuf[7] = 0x10 | (req->bus->info->tcq ? 0x02 : 0); 815 return buflen; 816 } 817 818 static inline bool media_is_dvd(SCSIDiskState *s) 819 { 820 uint64_t nb_sectors; 821 if (s->qdev.type != TYPE_ROM) { 822 return false; 823 } 824 if (!blk_is_available(s->qdev.conf.blk)) { 825 return false; 826 } 827 blk_get_geometry(s->qdev.conf.blk, &nb_sectors); 828 return nb_sectors > CD_MAX_SECTORS; 829 } 830 831 static inline bool media_is_cd(SCSIDiskState *s) 832 { 833 uint64_t nb_sectors; 834 if (s->qdev.type != TYPE_ROM) { 835 return false; 836 } 837 if (!blk_is_available(s->qdev.conf.blk)) { 838 return false; 839 } 840 blk_get_geometry(s->qdev.conf.blk, &nb_sectors); 841 return nb_sectors <= CD_MAX_SECTORS; 842 } 843 844 static int scsi_read_disc_information(SCSIDiskState *s, SCSIDiskReq *r, 845 uint8_t *outbuf) 846 { 847 uint8_t type = r->req.cmd.buf[1] & 7; 848 849 if (s->qdev.type != TYPE_ROM) { 850 return -1; 851 } 852 853 /* Types 1/2 are only defined for Blu-Ray. */ 854 if (type != 0) { 855 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); 856 return -1; 857 } 858 859 memset(outbuf, 0, 34); 860 outbuf[1] = 32; 861 outbuf[2] = 0xe; /* last session complete, disc finalized */ 862 outbuf[3] = 1; /* first track on disc */ 863 outbuf[4] = 1; /* # of sessions */ 864 outbuf[5] = 1; /* first track of last session */ 865 outbuf[6] = 1; /* last track of last session */ 866 outbuf[7] = 0x20; /* unrestricted use */ 867 outbuf[8] = 0x00; /* CD-ROM or DVD-ROM */ 868 /* 9-10-11: most significant byte corresponding bytes 4-5-6 */ 869 /* 12-23: not meaningful for CD-ROM or DVD-ROM */ 870 /* 24-31: disc bar code */ 871 /* 32: disc application code */ 872 /* 33: number of OPC tables */ 873 874 return 34; 875 } 876 877 static int scsi_read_dvd_structure(SCSIDiskState *s, SCSIDiskReq *r, 878 uint8_t *outbuf) 879 { 880 static const int rds_caps_size[5] = { 881 [0] = 2048 + 4, 882 [1] = 4 + 4, 883 [3] = 188 + 4, 884 [4] = 2048 + 4, 885 }; 886 887 uint8_t media = r->req.cmd.buf[1]; 888 uint8_t layer = r->req.cmd.buf[6]; 889 uint8_t format = r->req.cmd.buf[7]; 890 int size = -1; 891 892 if (s->qdev.type != TYPE_ROM) { 893 return -1; 894 } 895 if (media != 0) { 896 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); 897 return -1; 898 } 899 900 if (format != 0xff) { 901 if (!blk_is_available(s->qdev.conf.blk)) { 902 scsi_check_condition(r, SENSE_CODE(NO_MEDIUM)); 903 return -1; 904 } 905 if (media_is_cd(s)) { 906 scsi_check_condition(r, SENSE_CODE(INCOMPATIBLE_FORMAT)); 907 return -1; 908 } 909 if (format >= ARRAY_SIZE(rds_caps_size)) { 910 return -1; 911 } 912 size = rds_caps_size[format]; 913 memset(outbuf, 0, size); 914 } 915 916 switch (format) { 917 case 0x00: { 918 /* Physical format information */ 919 uint64_t nb_sectors; 920 if (layer != 0) { 921 goto fail; 922 } 923 blk_get_geometry(s->qdev.conf.blk, &nb_sectors); 924 925 outbuf[4] = 1; /* DVD-ROM, part version 1 */ 926 outbuf[5] = 0xf; /* 120mm disc, minimum rate unspecified */ 927 outbuf[6] = 1; /* one layer, read-only (per MMC-2 spec) */ 928 outbuf[7] = 0; /* default densities */ 929 930 stl_be_p(&outbuf[12], (nb_sectors >> 2) - 1); /* end sector */ 931 stl_be_p(&outbuf[16], (nb_sectors >> 2) - 1); /* l0 end sector */ 932 break; 933 } 934 935 case 0x01: /* DVD copyright information, all zeros */ 936 break; 937 938 case 0x03: /* BCA information - invalid field for no BCA info */ 939 return -1; 940 941 case 0x04: /* DVD disc manufacturing information, all zeros */ 942 break; 943 944 case 0xff: { /* List capabilities */ 945 int i; 946 size = 4; 947 for (i = 0; i < ARRAY_SIZE(rds_caps_size); i++) { 948 if (!rds_caps_size[i]) { 949 continue; 950 } 951 outbuf[size] = i; 952 outbuf[size + 1] = 0x40; /* Not writable, readable */ 953 stw_be_p(&outbuf[size + 2], rds_caps_size[i]); 954 size += 4; 955 } 956 break; 957 } 958 959 default: 960 return -1; 961 } 962 963 /* Size of buffer, not including 2 byte size field */ 964 stw_be_p(outbuf, size - 2); 965 return size; 966 967 fail: 968 return -1; 969 } 970 971 static int scsi_event_status_media(SCSIDiskState *s, uint8_t *outbuf) 972 { 973 uint8_t event_code, media_status; 974 975 media_status = 0; 976 if (s->tray_open) { 977 media_status = MS_TRAY_OPEN; 978 } else if (blk_is_inserted(s->qdev.conf.blk)) { 979 media_status = MS_MEDIA_PRESENT; 980 } 981 982 /* Event notification descriptor */ 983 event_code = MEC_NO_CHANGE; 984 if (media_status != MS_TRAY_OPEN) { 985 if (s->media_event) { 986 event_code = MEC_NEW_MEDIA; 987 s->media_event = false; 988 } else if (s->eject_request) { 989 event_code = MEC_EJECT_REQUESTED; 990 s->eject_request = false; 991 } 992 } 993 994 outbuf[0] = event_code; 995 outbuf[1] = media_status; 996 997 /* These fields are reserved, just clear them. */ 998 outbuf[2] = 0; 999 outbuf[3] = 0; 1000 return 4; 1001 } 1002 1003 static int scsi_get_event_status_notification(SCSIDiskState *s, SCSIDiskReq *r, 1004 uint8_t *outbuf) 1005 { 1006 int size; 1007 uint8_t *buf = r->req.cmd.buf; 1008 uint8_t notification_class_request = buf[4]; 1009 if (s->qdev.type != TYPE_ROM) { 1010 return -1; 1011 } 1012 if ((buf[1] & 1) == 0) { 1013 /* asynchronous */ 1014 return -1; 1015 } 1016 1017 size = 4; 1018 outbuf[0] = outbuf[1] = 0; 1019 outbuf[3] = 1 << GESN_MEDIA; /* supported events */ 1020 if (notification_class_request & (1 << GESN_MEDIA)) { 1021 outbuf[2] = GESN_MEDIA; 1022 size += scsi_event_status_media(s, &outbuf[size]); 1023 } else { 1024 outbuf[2] = 0x80; 1025 } 1026 stw_be_p(outbuf, size - 4); 1027 return size; 1028 } 1029 1030 static int scsi_get_configuration(SCSIDiskState *s, uint8_t *outbuf) 1031 { 1032 int current; 1033 1034 if (s->qdev.type != TYPE_ROM) { 1035 return -1; 1036 } 1037 1038 if (media_is_dvd(s)) { 1039 current = MMC_PROFILE_DVD_ROM; 1040 } else if (media_is_cd(s)) { 1041 current = MMC_PROFILE_CD_ROM; 1042 } else { 1043 current = MMC_PROFILE_NONE; 1044 } 1045 1046 memset(outbuf, 0, 40); 1047 stl_be_p(&outbuf[0], 36); /* Bytes after the data length field */ 1048 stw_be_p(&outbuf[6], current); 1049 /* outbuf[8] - outbuf[19]: Feature 0 - Profile list */ 1050 outbuf[10] = 0x03; /* persistent, current */ 1051 outbuf[11] = 8; /* two profiles */ 1052 stw_be_p(&outbuf[12], MMC_PROFILE_DVD_ROM); 1053 outbuf[14] = (current == MMC_PROFILE_DVD_ROM); 1054 stw_be_p(&outbuf[16], MMC_PROFILE_CD_ROM); 1055 outbuf[18] = (current == MMC_PROFILE_CD_ROM); 1056 /* outbuf[20] - outbuf[31]: Feature 1 - Core feature */ 1057 stw_be_p(&outbuf[20], 1); 1058 outbuf[22] = 0x08 | 0x03; /* version 2, persistent, current */ 1059 outbuf[23] = 8; 1060 stl_be_p(&outbuf[24], 1); /* SCSI */ 1061 outbuf[28] = 1; /* DBE = 1, mandatory */ 1062 /* outbuf[32] - outbuf[39]: Feature 3 - Removable media feature */ 1063 stw_be_p(&outbuf[32], 3); 1064 outbuf[34] = 0x08 | 0x03; /* version 2, persistent, current */ 1065 outbuf[35] = 4; 1066 outbuf[36] = 0x39; /* tray, load=1, eject=1, unlocked at powerup, lock=1 */ 1067 /* TODO: Random readable, CD read, DVD read, drive serial number, 1068 power management */ 1069 return 40; 1070 } 1071 1072 static int scsi_emulate_mechanism_status(SCSIDiskState *s, uint8_t *outbuf) 1073 { 1074 if (s->qdev.type != TYPE_ROM) { 1075 return -1; 1076 } 1077 memset(outbuf, 0, 8); 1078 outbuf[5] = 1; /* CD-ROM */ 1079 return 8; 1080 } 1081 1082 static int mode_sense_page(SCSIDiskState *s, int page, uint8_t **p_outbuf, 1083 int page_control) 1084 { 1085 static const int mode_sense_valid[0x3f] = { 1086 [MODE_PAGE_VENDOR_SPECIFIC] = (1 << TYPE_DISK) | (1 << TYPE_ROM), 1087 [MODE_PAGE_HD_GEOMETRY] = (1 << TYPE_DISK), 1088 [MODE_PAGE_FLEXIBLE_DISK_GEOMETRY] = (1 << TYPE_DISK), 1089 [MODE_PAGE_CACHING] = (1 << TYPE_DISK) | (1 << TYPE_ROM), 1090 [MODE_PAGE_R_W_ERROR] = (1 << TYPE_DISK) | (1 << TYPE_ROM), 1091 [MODE_PAGE_AUDIO_CTL] = (1 << TYPE_ROM), 1092 [MODE_PAGE_CAPABILITIES] = (1 << TYPE_ROM), 1093 [MODE_PAGE_APPLE_VENDOR] = (1 << TYPE_ROM), 1094 }; 1095 1096 uint8_t *p = *p_outbuf + 2; 1097 int length; 1098 1099 assert(page < ARRAY_SIZE(mode_sense_valid)); 1100 if ((mode_sense_valid[page] & (1 << s->qdev.type)) == 0) { 1101 return -1; 1102 } 1103 1104 /* 1105 * If Changeable Values are requested, a mask denoting those mode parameters 1106 * that are changeable shall be returned. As we currently don't support 1107 * parameter changes via MODE_SELECT all bits are returned set to zero. 1108 * The buffer was already menset to zero by the caller of this function. 1109 * 1110 * The offsets here are off by two compared to the descriptions in the 1111 * SCSI specs, because those include a 2-byte header. This is unfortunate, 1112 * but it is done so that offsets are consistent within our implementation 1113 * of MODE SENSE and MODE SELECT. MODE SELECT has to deal with both 1114 * 2-byte and 4-byte headers. 1115 */ 1116 switch (page) { 1117 case MODE_PAGE_HD_GEOMETRY: 1118 length = 0x16; 1119 if (page_control == 1) { /* Changeable Values */ 1120 break; 1121 } 1122 /* if a geometry hint is available, use it */ 1123 p[0] = (s->qdev.conf.cyls >> 16) & 0xff; 1124 p[1] = (s->qdev.conf.cyls >> 8) & 0xff; 1125 p[2] = s->qdev.conf.cyls & 0xff; 1126 p[3] = s->qdev.conf.heads & 0xff; 1127 /* Write precomp start cylinder, disabled */ 1128 p[4] = (s->qdev.conf.cyls >> 16) & 0xff; 1129 p[5] = (s->qdev.conf.cyls >> 8) & 0xff; 1130 p[6] = s->qdev.conf.cyls & 0xff; 1131 /* Reduced current start cylinder, disabled */ 1132 p[7] = (s->qdev.conf.cyls >> 16) & 0xff; 1133 p[8] = (s->qdev.conf.cyls >> 8) & 0xff; 1134 p[9] = s->qdev.conf.cyls & 0xff; 1135 /* Device step rate [ns], 200ns */ 1136 p[10] = 0; 1137 p[11] = 200; 1138 /* Landing zone cylinder */ 1139 p[12] = 0xff; 1140 p[13] = 0xff; 1141 p[14] = 0xff; 1142 /* Medium rotation rate [rpm], 5400 rpm */ 1143 p[18] = (5400 >> 8) & 0xff; 1144 p[19] = 5400 & 0xff; 1145 break; 1146 1147 case MODE_PAGE_FLEXIBLE_DISK_GEOMETRY: 1148 length = 0x1e; 1149 if (page_control == 1) { /* Changeable Values */ 1150 break; 1151 } 1152 /* Transfer rate [kbit/s], 5Mbit/s */ 1153 p[0] = 5000 >> 8; 1154 p[1] = 5000 & 0xff; 1155 /* if a geometry hint is available, use it */ 1156 p[2] = s->qdev.conf.heads & 0xff; 1157 p[3] = s->qdev.conf.secs & 0xff; 1158 p[4] = s->qdev.blocksize >> 8; 1159 p[6] = (s->qdev.conf.cyls >> 8) & 0xff; 1160 p[7] = s->qdev.conf.cyls & 0xff; 1161 /* Write precomp start cylinder, disabled */ 1162 p[8] = (s->qdev.conf.cyls >> 8) & 0xff; 1163 p[9] = s->qdev.conf.cyls & 0xff; 1164 /* Reduced current start cylinder, disabled */ 1165 p[10] = (s->qdev.conf.cyls >> 8) & 0xff; 1166 p[11] = s->qdev.conf.cyls & 0xff; 1167 /* Device step rate [100us], 100us */ 1168 p[12] = 0; 1169 p[13] = 1; 1170 /* Device step pulse width [us], 1us */ 1171 p[14] = 1; 1172 /* Device head settle delay [100us], 100us */ 1173 p[15] = 0; 1174 p[16] = 1; 1175 /* Motor on delay [0.1s], 0.1s */ 1176 p[17] = 1; 1177 /* Motor off delay [0.1s], 0.1s */ 1178 p[18] = 1; 1179 /* Medium rotation rate [rpm], 5400 rpm */ 1180 p[26] = (5400 >> 8) & 0xff; 1181 p[27] = 5400 & 0xff; 1182 break; 1183 1184 case MODE_PAGE_CACHING: 1185 length = 0x12; 1186 if (page_control == 1 || /* Changeable Values */ 1187 blk_enable_write_cache(s->qdev.conf.blk)) { 1188 p[0] = 4; /* WCE */ 1189 } 1190 break; 1191 1192 case MODE_PAGE_R_W_ERROR: 1193 length = 10; 1194 if (page_control == 1) { /* Changeable Values */ 1195 if (s->qdev.type == TYPE_ROM) { 1196 /* Automatic Write Reallocation Enabled */ 1197 p[0] = 0x80; 1198 } 1199 break; 1200 } 1201 p[0] = 0x80; /* Automatic Write Reallocation Enabled */ 1202 if (s->qdev.type == TYPE_ROM) { 1203 p[1] = 0x20; /* Read Retry Count */ 1204 } 1205 break; 1206 1207 case MODE_PAGE_AUDIO_CTL: 1208 length = 14; 1209 break; 1210 1211 case MODE_PAGE_CAPABILITIES: 1212 length = 0x14; 1213 if (page_control == 1) { /* Changeable Values */ 1214 break; 1215 } 1216 1217 p[0] = 0x3b; /* CD-R & CD-RW read */ 1218 p[1] = 0; /* Writing not supported */ 1219 p[2] = 0x7f; /* Audio, composite, digital out, 1220 mode 2 form 1&2, multi session */ 1221 p[3] = 0xff; /* CD DA, DA accurate, RW supported, 1222 RW corrected, C2 errors, ISRC, 1223 UPC, Bar code */ 1224 p[4] = 0x2d | (s->tray_locked ? 2 : 0); 1225 /* Locking supported, jumper present, eject, tray */ 1226 p[5] = 0; /* no volume & mute control, no 1227 changer */ 1228 p[6] = (50 * 176) >> 8; /* 50x read speed */ 1229 p[7] = (50 * 176) & 0xff; 1230 p[8] = 2 >> 8; /* Two volume levels */ 1231 p[9] = 2 & 0xff; 1232 p[10] = 2048 >> 8; /* 2M buffer */ 1233 p[11] = 2048 & 0xff; 1234 p[12] = (16 * 176) >> 8; /* 16x read speed current */ 1235 p[13] = (16 * 176) & 0xff; 1236 p[16] = (16 * 176) >> 8; /* 16x write speed */ 1237 p[17] = (16 * 176) & 0xff; 1238 p[18] = (16 * 176) >> 8; /* 16x write speed current */ 1239 p[19] = (16 * 176) & 0xff; 1240 break; 1241 1242 case MODE_PAGE_APPLE_VENDOR: 1243 if (s->quirks & (1 << SCSI_DISK_QUIRK_MODE_PAGE_APPLE_VENDOR)) { 1244 length = 0x1e; 1245 if (page_control == 1) { /* Changeable Values */ 1246 break; 1247 } 1248 1249 memset(p, 0, length); 1250 strcpy((char *)p + 8, "APPLE COMPUTER, INC "); 1251 break; 1252 } else { 1253 return -1; 1254 } 1255 1256 case MODE_PAGE_VENDOR_SPECIFIC: 1257 if (s->qdev.type == TYPE_DISK && (s->quirks & 1258 (1 << SCSI_DISK_QUIRK_MODE_PAGE_VENDOR_SPECIFIC_APPLE))) { 1259 length = 0x2; 1260 if (page_control == 1) { /* Changeable Values */ 1261 p[0] = 0xff; 1262 p[1] = 0xff; 1263 break; 1264 } 1265 p[0] = 0; 1266 p[1] = 0; 1267 break; 1268 } else { 1269 return -1; 1270 } 1271 1272 default: 1273 return -1; 1274 } 1275 1276 assert(length < 256); 1277 (*p_outbuf)[0] = page; 1278 (*p_outbuf)[1] = length; 1279 *p_outbuf += length + 2; 1280 return length + 2; 1281 } 1282 1283 static int scsi_disk_emulate_mode_sense(SCSIDiskReq *r, uint8_t *outbuf) 1284 { 1285 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 1286 uint64_t nb_sectors; 1287 bool dbd; 1288 int page, buflen, ret, page_control; 1289 uint8_t *p; 1290 uint8_t dev_specific_param; 1291 1292 dbd = (r->req.cmd.buf[1] & 0x8) != 0; 1293 page = r->req.cmd.buf[2] & 0x3f; 1294 page_control = (r->req.cmd.buf[2] & 0xc0) >> 6; 1295 1296 trace_scsi_disk_emulate_mode_sense((r->req.cmd.buf[0] == MODE_SENSE) ? 6 : 1297 10, page, r->req.cmd.xfer, page_control); 1298 memset(outbuf, 0, r->req.cmd.xfer); 1299 p = outbuf; 1300 1301 if (s->qdev.type == TYPE_DISK) { 1302 dev_specific_param = s->features & (1 << SCSI_DISK_F_DPOFUA) ? 0x10 : 0; 1303 if (!blk_is_writable(s->qdev.conf.blk)) { 1304 dev_specific_param |= 0x80; /* Readonly. */ 1305 } 1306 } else { 1307 if (s->quirks & (1 << SCSI_DISK_QUIRK_MODE_SENSE_ROM_USE_DBD)) { 1308 /* Use DBD from the request... */ 1309 dev_specific_param = 0x00; 1310 1311 /* 1312 * ... unless we receive a request for MODE_PAGE_APPLE_VENDOR 1313 * which should never return a block descriptor even though DBD is 1314 * not set, otherwise CDROM detection fails in MacOS 1315 */ 1316 if (s->quirks & (1 << SCSI_DISK_QUIRK_MODE_PAGE_APPLE_VENDOR) && 1317 page == MODE_PAGE_APPLE_VENDOR) { 1318 dbd = true; 1319 } 1320 } else { 1321 /* 1322 * MMC prescribes that CD/DVD drives have no block descriptors, 1323 * and defines no device-specific parameter. 1324 */ 1325 dev_specific_param = 0x00; 1326 dbd = true; 1327 } 1328 } 1329 1330 if (r->req.cmd.buf[0] == MODE_SENSE) { 1331 p[1] = 0; /* Default media type. */ 1332 p[2] = dev_specific_param; 1333 p[3] = 0; /* Block descriptor length. */ 1334 p += 4; 1335 } else { /* MODE_SENSE_10 */ 1336 p[2] = 0; /* Default media type. */ 1337 p[3] = dev_specific_param; 1338 p[6] = p[7] = 0; /* Block descriptor length. */ 1339 p += 8; 1340 } 1341 1342 blk_get_geometry(s->qdev.conf.blk, &nb_sectors); 1343 if (!dbd && nb_sectors) { 1344 if (r->req.cmd.buf[0] == MODE_SENSE) { 1345 outbuf[3] = 8; /* Block descriptor length */ 1346 } else { /* MODE_SENSE_10 */ 1347 outbuf[7] = 8; /* Block descriptor length */ 1348 } 1349 nb_sectors /= (s->qdev.blocksize / BDRV_SECTOR_SIZE); 1350 if (nb_sectors > 0xffffff) { 1351 nb_sectors = 0; 1352 } 1353 p[0] = 0; /* media density code */ 1354 p[1] = (nb_sectors >> 16) & 0xff; 1355 p[2] = (nb_sectors >> 8) & 0xff; 1356 p[3] = nb_sectors & 0xff; 1357 p[4] = 0; /* reserved */ 1358 p[5] = 0; /* bytes 5-7 are the sector size in bytes */ 1359 p[6] = s->qdev.blocksize >> 8; 1360 p[7] = 0; 1361 p += 8; 1362 } 1363 1364 if (page_control == 3) { 1365 /* Saved Values */ 1366 scsi_check_condition(r, SENSE_CODE(SAVING_PARAMS_NOT_SUPPORTED)); 1367 return -1; 1368 } 1369 1370 if (page == 0x3f) { 1371 for (page = 0; page <= 0x3e; page++) { 1372 mode_sense_page(s, page, &p, page_control); 1373 } 1374 } else { 1375 ret = mode_sense_page(s, page, &p, page_control); 1376 if (ret == -1) { 1377 return -1; 1378 } 1379 } 1380 1381 buflen = p - outbuf; 1382 /* 1383 * The mode data length field specifies the length in bytes of the 1384 * following data that is available to be transferred. The mode data 1385 * length does not include itself. 1386 */ 1387 if (r->req.cmd.buf[0] == MODE_SENSE) { 1388 outbuf[0] = buflen - 1; 1389 } else { /* MODE_SENSE_10 */ 1390 outbuf[0] = ((buflen - 2) >> 8) & 0xff; 1391 outbuf[1] = (buflen - 2) & 0xff; 1392 } 1393 return buflen; 1394 } 1395 1396 static int scsi_disk_emulate_read_toc(SCSIRequest *req, uint8_t *outbuf) 1397 { 1398 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); 1399 int start_track, format, msf, toclen; 1400 uint64_t nb_sectors; 1401 1402 msf = req->cmd.buf[1] & 2; 1403 format = req->cmd.buf[2] & 0xf; 1404 start_track = req->cmd.buf[6]; 1405 blk_get_geometry(s->qdev.conf.blk, &nb_sectors); 1406 trace_scsi_disk_emulate_read_toc(start_track, format, msf >> 1); 1407 nb_sectors /= s->qdev.blocksize / BDRV_SECTOR_SIZE; 1408 switch (format) { 1409 case 0: 1410 toclen = cdrom_read_toc(nb_sectors, outbuf, msf, start_track); 1411 break; 1412 case 1: 1413 /* multi session : only a single session defined */ 1414 toclen = 12; 1415 memset(outbuf, 0, 12); 1416 outbuf[1] = 0x0a; 1417 outbuf[2] = 0x01; 1418 outbuf[3] = 0x01; 1419 break; 1420 case 2: 1421 toclen = cdrom_read_toc_raw(nb_sectors, outbuf, msf, start_track); 1422 break; 1423 default: 1424 return -1; 1425 } 1426 return toclen; 1427 } 1428 1429 static int scsi_disk_emulate_start_stop(SCSIDiskReq *r) 1430 { 1431 SCSIRequest *req = &r->req; 1432 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); 1433 bool start = req->cmd.buf[4] & 1; 1434 bool loej = req->cmd.buf[4] & 2; /* load on start, eject on !start */ 1435 int pwrcnd = req->cmd.buf[4] & 0xf0; 1436 1437 if (pwrcnd) { 1438 /* eject/load only happens for power condition == 0 */ 1439 return 0; 1440 } 1441 1442 if ((s->features & (1 << SCSI_DISK_F_REMOVABLE)) && loej) { 1443 if (!start && !s->tray_open && s->tray_locked) { 1444 scsi_check_condition(r, 1445 blk_is_inserted(s->qdev.conf.blk) 1446 ? SENSE_CODE(ILLEGAL_REQ_REMOVAL_PREVENTED) 1447 : SENSE_CODE(NOT_READY_REMOVAL_PREVENTED)); 1448 return -1; 1449 } 1450 1451 if (s->tray_open != !start) { 1452 blk_eject(s->qdev.conf.blk, !start); 1453 s->tray_open = !start; 1454 } 1455 } 1456 return 0; 1457 } 1458 1459 static void scsi_disk_emulate_read_data(SCSIRequest *req) 1460 { 1461 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 1462 int buflen = r->iov.iov_len; 1463 1464 if (buflen) { 1465 trace_scsi_disk_emulate_read_data(buflen); 1466 r->iov.iov_len = 0; 1467 r->started = true; 1468 scsi_req_data(&r->req, buflen); 1469 return; 1470 } 1471 1472 /* This also clears the sense buffer for REQUEST SENSE. */ 1473 scsi_req_complete(&r->req, GOOD); 1474 } 1475 1476 static int scsi_disk_check_mode_select(SCSIDiskState *s, int page, 1477 uint8_t *inbuf, int inlen) 1478 { 1479 uint8_t mode_current[SCSI_MAX_MODE_LEN]; 1480 uint8_t mode_changeable[SCSI_MAX_MODE_LEN]; 1481 uint8_t *p; 1482 int len, expected_len, changeable_len, i; 1483 1484 /* The input buffer does not include the page header, so it is 1485 * off by 2 bytes. 1486 */ 1487 expected_len = inlen + 2; 1488 if (expected_len > SCSI_MAX_MODE_LEN) { 1489 return -1; 1490 } 1491 1492 /* MODE_PAGE_ALLS is only valid for MODE SENSE commands */ 1493 if (page == MODE_PAGE_ALLS) { 1494 return -1; 1495 } 1496 1497 p = mode_current; 1498 memset(mode_current, 0, inlen + 2); 1499 len = mode_sense_page(s, page, &p, 0); 1500 if (len < 0 || len != expected_len) { 1501 return -1; 1502 } 1503 1504 p = mode_changeable; 1505 memset(mode_changeable, 0, inlen + 2); 1506 changeable_len = mode_sense_page(s, page, &p, 1); 1507 assert(changeable_len == len); 1508 1509 /* Check that unchangeable bits are the same as what MODE SENSE 1510 * would return. 1511 */ 1512 for (i = 2; i < len; i++) { 1513 if (((mode_current[i] ^ inbuf[i - 2]) & ~mode_changeable[i]) != 0) { 1514 return -1; 1515 } 1516 } 1517 return 0; 1518 } 1519 1520 static void scsi_disk_apply_mode_select(SCSIDiskState *s, int page, uint8_t *p) 1521 { 1522 switch (page) { 1523 case MODE_PAGE_CACHING: 1524 blk_set_enable_write_cache(s->qdev.conf.blk, (p[0] & 4) != 0); 1525 break; 1526 1527 default: 1528 break; 1529 } 1530 } 1531 1532 static int mode_select_pages(SCSIDiskReq *r, uint8_t *p, int len, bool change) 1533 { 1534 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 1535 1536 while (len > 0) { 1537 int page, subpage, page_len; 1538 1539 /* Parse both possible formats for the mode page headers. */ 1540 page = p[0] & 0x3f; 1541 if (p[0] & 0x40) { 1542 if (len < 4) { 1543 goto invalid_param_len; 1544 } 1545 subpage = p[1]; 1546 page_len = lduw_be_p(&p[2]); 1547 p += 4; 1548 len -= 4; 1549 } else { 1550 if (len < 2) { 1551 goto invalid_param_len; 1552 } 1553 subpage = 0; 1554 page_len = p[1]; 1555 p += 2; 1556 len -= 2; 1557 } 1558 1559 if (subpage) { 1560 goto invalid_param; 1561 } 1562 if (page_len > len) { 1563 if (!(s->quirks & SCSI_DISK_QUIRK_MODE_PAGE_TRUNCATED)) { 1564 goto invalid_param_len; 1565 } 1566 trace_scsi_disk_mode_select_page_truncated(page, page_len, len); 1567 } 1568 1569 if (!change) { 1570 if (scsi_disk_check_mode_select(s, page, p, page_len) < 0) { 1571 goto invalid_param; 1572 } 1573 } else { 1574 scsi_disk_apply_mode_select(s, page, p); 1575 } 1576 1577 p += page_len; 1578 len -= page_len; 1579 } 1580 return 0; 1581 1582 invalid_param: 1583 scsi_check_condition(r, SENSE_CODE(INVALID_PARAM)); 1584 return -1; 1585 1586 invalid_param_len: 1587 scsi_check_condition(r, SENSE_CODE(INVALID_PARAM_LEN)); 1588 return -1; 1589 } 1590 1591 static void scsi_disk_emulate_mode_select(SCSIDiskReq *r, uint8_t *inbuf) 1592 { 1593 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 1594 uint8_t *p = inbuf; 1595 int cmd = r->req.cmd.buf[0]; 1596 int len = r->req.cmd.xfer; 1597 int hdr_len = (cmd == MODE_SELECT ? 4 : 8); 1598 int bd_len, bs; 1599 int pass; 1600 1601 if ((r->req.cmd.buf[1] & 0x11) != 0x10) { 1602 if (!(s->quirks & 1603 (1 << SCSI_DISK_QUIRK_MODE_PAGE_VENDOR_SPECIFIC_APPLE))) { 1604 /* We only support PF=1, SP=0. */ 1605 goto invalid_field; 1606 } 1607 } 1608 1609 if (len < hdr_len) { 1610 goto invalid_param_len; 1611 } 1612 1613 bd_len = (cmd == MODE_SELECT ? p[3] : lduw_be_p(&p[6])); 1614 len -= hdr_len; 1615 p += hdr_len; 1616 if (len < bd_len) { 1617 goto invalid_param_len; 1618 } 1619 if (bd_len != 0 && bd_len != 8) { 1620 goto invalid_param; 1621 } 1622 1623 /* Allow changing the block size */ 1624 if (bd_len) { 1625 bs = p[5] << 16 | p[6] << 8 | p[7]; 1626 1627 /* 1628 * Since the existing code only checks/updates bits 8-15 of the block 1629 * size, restrict ourselves to the same requirement for now to ensure 1630 * that a block size set by a block descriptor and then read back by 1631 * a subsequent SCSI command will be the same. Also disallow a block 1632 * size of 256 since we cannot handle anything below BDRV_SECTOR_SIZE. 1633 */ 1634 if (bs && !(bs & ~0xfe00) && bs != s->qdev.blocksize) { 1635 s->qdev.blocksize = bs; 1636 trace_scsi_disk_mode_select_set_blocksize(s->qdev.blocksize); 1637 } 1638 } 1639 1640 len -= bd_len; 1641 p += bd_len; 1642 1643 /* Ensure no change is made if there is an error! */ 1644 for (pass = 0; pass < 2; pass++) { 1645 if (mode_select_pages(r, p, len, pass == 1) < 0) { 1646 assert(pass == 0); 1647 return; 1648 } 1649 } 1650 if (!blk_enable_write_cache(s->qdev.conf.blk)) { 1651 /* The request is used as the AIO opaque value, so add a ref. */ 1652 scsi_req_ref(&r->req); 1653 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 0, 1654 BLOCK_ACCT_FLUSH); 1655 r->req.aiocb = blk_aio_flush(s->qdev.conf.blk, scsi_aio_complete, r); 1656 return; 1657 } 1658 1659 scsi_req_complete(&r->req, GOOD); 1660 return; 1661 1662 invalid_param: 1663 scsi_check_condition(r, SENSE_CODE(INVALID_PARAM)); 1664 return; 1665 1666 invalid_param_len: 1667 scsi_check_condition(r, SENSE_CODE(INVALID_PARAM_LEN)); 1668 return; 1669 1670 invalid_field: 1671 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); 1672 } 1673 1674 /* sector_num and nb_sectors expected to be in qdev blocksize */ 1675 static inline bool check_lba_range(SCSIDiskState *s, 1676 uint64_t sector_num, uint32_t nb_sectors) 1677 { 1678 /* 1679 * The first line tests that no overflow happens when computing the last 1680 * sector. The second line tests that the last accessed sector is in 1681 * range. 1682 * 1683 * Careful, the computations should not underflow for nb_sectors == 0, 1684 * and a 0-block read to the first LBA beyond the end of device is 1685 * valid. 1686 */ 1687 return (sector_num <= sector_num + nb_sectors && 1688 sector_num + nb_sectors <= s->qdev.max_lba + 1); 1689 } 1690 1691 typedef struct UnmapCBData { 1692 SCSIDiskReq *r; 1693 uint8_t *inbuf; 1694 int count; 1695 } UnmapCBData; 1696 1697 static void scsi_unmap_complete(void *opaque, int ret); 1698 1699 static void scsi_unmap_complete_noio(UnmapCBData *data, int ret) 1700 { 1701 SCSIDiskReq *r = data->r; 1702 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 1703 1704 assert(r->req.aiocb == NULL); 1705 1706 if (data->count > 0) { 1707 uint64_t sector_num = ldq_be_p(&data->inbuf[0]); 1708 uint32_t nb_sectors = ldl_be_p(&data->inbuf[8]) & 0xffffffffULL; 1709 r->sector = sector_num * (s->qdev.blocksize / BDRV_SECTOR_SIZE); 1710 r->sector_count = nb_sectors * (s->qdev.blocksize / BDRV_SECTOR_SIZE); 1711 1712 if (!check_lba_range(s, sector_num, nb_sectors)) { 1713 block_acct_invalid(blk_get_stats(s->qdev.conf.blk), 1714 BLOCK_ACCT_UNMAP); 1715 scsi_check_condition(r, SENSE_CODE(LBA_OUT_OF_RANGE)); 1716 goto done; 1717 } 1718 1719 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 1720 r->sector_count * BDRV_SECTOR_SIZE, 1721 BLOCK_ACCT_UNMAP); 1722 1723 r->req.aiocb = blk_aio_pdiscard(s->qdev.conf.blk, 1724 r->sector * BDRV_SECTOR_SIZE, 1725 r->sector_count * BDRV_SECTOR_SIZE, 1726 scsi_unmap_complete, data); 1727 data->count--; 1728 data->inbuf += 16; 1729 return; 1730 } 1731 1732 scsi_req_complete(&r->req, GOOD); 1733 1734 done: 1735 scsi_req_unref(&r->req); 1736 g_free(data); 1737 } 1738 1739 static void scsi_unmap_complete(void *opaque, int ret) 1740 { 1741 UnmapCBData *data = opaque; 1742 SCSIDiskReq *r = data->r; 1743 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 1744 1745 aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk)); 1746 1747 assert(r->req.aiocb != NULL); 1748 r->req.aiocb = NULL; 1749 1750 if (scsi_disk_req_check_error(r, ret, true)) { 1751 scsi_req_unref(&r->req); 1752 g_free(data); 1753 } else { 1754 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct); 1755 scsi_unmap_complete_noio(data, ret); 1756 } 1757 aio_context_release(blk_get_aio_context(s->qdev.conf.blk)); 1758 } 1759 1760 static void scsi_disk_emulate_unmap(SCSIDiskReq *r, uint8_t *inbuf) 1761 { 1762 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 1763 uint8_t *p = inbuf; 1764 int len = r->req.cmd.xfer; 1765 UnmapCBData *data; 1766 1767 /* Reject ANCHOR=1. */ 1768 if (r->req.cmd.buf[1] & 0x1) { 1769 goto invalid_field; 1770 } 1771 1772 if (len < 8) { 1773 goto invalid_param_len; 1774 } 1775 if (len < lduw_be_p(&p[0]) + 2) { 1776 goto invalid_param_len; 1777 } 1778 if (len < lduw_be_p(&p[2]) + 8) { 1779 goto invalid_param_len; 1780 } 1781 if (lduw_be_p(&p[2]) & 15) { 1782 goto invalid_param_len; 1783 } 1784 1785 if (!blk_is_writable(s->qdev.conf.blk)) { 1786 block_acct_invalid(blk_get_stats(s->qdev.conf.blk), BLOCK_ACCT_UNMAP); 1787 scsi_check_condition(r, SENSE_CODE(WRITE_PROTECTED)); 1788 return; 1789 } 1790 1791 data = g_new0(UnmapCBData, 1); 1792 data->r = r; 1793 data->inbuf = &p[8]; 1794 data->count = lduw_be_p(&p[2]) >> 4; 1795 1796 /* The matching unref is in scsi_unmap_complete, before data is freed. */ 1797 scsi_req_ref(&r->req); 1798 scsi_unmap_complete_noio(data, 0); 1799 return; 1800 1801 invalid_param_len: 1802 block_acct_invalid(blk_get_stats(s->qdev.conf.blk), BLOCK_ACCT_UNMAP); 1803 scsi_check_condition(r, SENSE_CODE(INVALID_PARAM_LEN)); 1804 return; 1805 1806 invalid_field: 1807 block_acct_invalid(blk_get_stats(s->qdev.conf.blk), BLOCK_ACCT_UNMAP); 1808 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); 1809 } 1810 1811 typedef struct WriteSameCBData { 1812 SCSIDiskReq *r; 1813 int64_t sector; 1814 int nb_sectors; 1815 QEMUIOVector qiov; 1816 struct iovec iov; 1817 } WriteSameCBData; 1818 1819 static void scsi_write_same_complete(void *opaque, int ret) 1820 { 1821 WriteSameCBData *data = opaque; 1822 SCSIDiskReq *r = data->r; 1823 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 1824 1825 aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk)); 1826 1827 assert(r->req.aiocb != NULL); 1828 r->req.aiocb = NULL; 1829 1830 if (scsi_disk_req_check_error(r, ret, true)) { 1831 goto done; 1832 } 1833 1834 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct); 1835 1836 data->nb_sectors -= data->iov.iov_len / BDRV_SECTOR_SIZE; 1837 data->sector += data->iov.iov_len / BDRV_SECTOR_SIZE; 1838 data->iov.iov_len = MIN(data->nb_sectors * BDRV_SECTOR_SIZE, 1839 data->iov.iov_len); 1840 if (data->iov.iov_len) { 1841 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 1842 data->iov.iov_len, BLOCK_ACCT_WRITE); 1843 /* Reinitialize qiov, to handle unaligned WRITE SAME request 1844 * where final qiov may need smaller size */ 1845 qemu_iovec_init_external(&data->qiov, &data->iov, 1); 1846 r->req.aiocb = blk_aio_pwritev(s->qdev.conf.blk, 1847 data->sector << BDRV_SECTOR_BITS, 1848 &data->qiov, 0, 1849 scsi_write_same_complete, data); 1850 aio_context_release(blk_get_aio_context(s->qdev.conf.blk)); 1851 return; 1852 } 1853 1854 scsi_req_complete(&r->req, GOOD); 1855 1856 done: 1857 scsi_req_unref(&r->req); 1858 qemu_vfree(data->iov.iov_base); 1859 g_free(data); 1860 aio_context_release(blk_get_aio_context(s->qdev.conf.blk)); 1861 } 1862 1863 static void scsi_disk_emulate_write_same(SCSIDiskReq *r, uint8_t *inbuf) 1864 { 1865 SCSIRequest *req = &r->req; 1866 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); 1867 uint32_t nb_sectors = scsi_data_cdb_xfer(r->req.cmd.buf); 1868 WriteSameCBData *data; 1869 uint8_t *buf; 1870 int i, l; 1871 1872 /* Fail if PBDATA=1 or LBDATA=1 or ANCHOR=1. */ 1873 if (nb_sectors == 0 || (req->cmd.buf[1] & 0x16)) { 1874 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); 1875 return; 1876 } 1877 1878 if (!blk_is_writable(s->qdev.conf.blk)) { 1879 scsi_check_condition(r, SENSE_CODE(WRITE_PROTECTED)); 1880 return; 1881 } 1882 if (!check_lba_range(s, r->req.cmd.lba, nb_sectors)) { 1883 scsi_check_condition(r, SENSE_CODE(LBA_OUT_OF_RANGE)); 1884 return; 1885 } 1886 1887 if ((req->cmd.buf[1] & 0x1) || buffer_is_zero(inbuf, s->qdev.blocksize)) { 1888 int flags = (req->cmd.buf[1] & 0x8) ? BDRV_REQ_MAY_UNMAP : 0; 1889 1890 /* The request is used as the AIO opaque value, so add a ref. */ 1891 scsi_req_ref(&r->req); 1892 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 1893 nb_sectors * s->qdev.blocksize, 1894 BLOCK_ACCT_WRITE); 1895 r->req.aiocb = blk_aio_pwrite_zeroes(s->qdev.conf.blk, 1896 r->req.cmd.lba * s->qdev.blocksize, 1897 nb_sectors * s->qdev.blocksize, 1898 flags, scsi_aio_complete, r); 1899 return; 1900 } 1901 1902 data = g_new0(WriteSameCBData, 1); 1903 data->r = r; 1904 data->sector = r->req.cmd.lba * (s->qdev.blocksize / BDRV_SECTOR_SIZE); 1905 data->nb_sectors = nb_sectors * (s->qdev.blocksize / BDRV_SECTOR_SIZE); 1906 data->iov.iov_len = MIN(data->nb_sectors * BDRV_SECTOR_SIZE, 1907 SCSI_WRITE_SAME_MAX); 1908 data->iov.iov_base = buf = blk_blockalign(s->qdev.conf.blk, 1909 data->iov.iov_len); 1910 qemu_iovec_init_external(&data->qiov, &data->iov, 1); 1911 1912 for (i = 0; i < data->iov.iov_len; i += l) { 1913 l = MIN(s->qdev.blocksize, data->iov.iov_len - i); 1914 memcpy(&buf[i], inbuf, l); 1915 } 1916 1917 scsi_req_ref(&r->req); 1918 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 1919 data->iov.iov_len, BLOCK_ACCT_WRITE); 1920 r->req.aiocb = blk_aio_pwritev(s->qdev.conf.blk, 1921 data->sector << BDRV_SECTOR_BITS, 1922 &data->qiov, 0, 1923 scsi_write_same_complete, data); 1924 } 1925 1926 static void scsi_disk_emulate_write_data(SCSIRequest *req) 1927 { 1928 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 1929 1930 if (r->iov.iov_len) { 1931 int buflen = r->iov.iov_len; 1932 trace_scsi_disk_emulate_write_data(buflen); 1933 r->iov.iov_len = 0; 1934 scsi_req_data(&r->req, buflen); 1935 return; 1936 } 1937 1938 switch (req->cmd.buf[0]) { 1939 case MODE_SELECT: 1940 case MODE_SELECT_10: 1941 /* This also clears the sense buffer for REQUEST SENSE. */ 1942 scsi_disk_emulate_mode_select(r, r->iov.iov_base); 1943 break; 1944 1945 case UNMAP: 1946 scsi_disk_emulate_unmap(r, r->iov.iov_base); 1947 break; 1948 1949 case VERIFY_10: 1950 case VERIFY_12: 1951 case VERIFY_16: 1952 if (r->req.status == -1) { 1953 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); 1954 } 1955 break; 1956 1957 case WRITE_SAME_10: 1958 case WRITE_SAME_16: 1959 scsi_disk_emulate_write_same(r, r->iov.iov_base); 1960 break; 1961 1962 default: 1963 abort(); 1964 } 1965 } 1966 1967 static int32_t scsi_disk_emulate_command(SCSIRequest *req, uint8_t *buf) 1968 { 1969 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 1970 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); 1971 uint64_t nb_sectors; 1972 uint8_t *outbuf; 1973 int buflen; 1974 1975 switch (req->cmd.buf[0]) { 1976 case INQUIRY: 1977 case MODE_SENSE: 1978 case MODE_SENSE_10: 1979 case RESERVE: 1980 case RESERVE_10: 1981 case RELEASE: 1982 case RELEASE_10: 1983 case START_STOP: 1984 case ALLOW_MEDIUM_REMOVAL: 1985 case GET_CONFIGURATION: 1986 case GET_EVENT_STATUS_NOTIFICATION: 1987 case MECHANISM_STATUS: 1988 case REQUEST_SENSE: 1989 break; 1990 1991 default: 1992 if (!blk_is_available(s->qdev.conf.blk)) { 1993 scsi_check_condition(r, SENSE_CODE(NO_MEDIUM)); 1994 return 0; 1995 } 1996 break; 1997 } 1998 1999 /* 2000 * FIXME: we shouldn't return anything bigger than 4k, but the code 2001 * requires the buffer to be as big as req->cmd.xfer in several 2002 * places. So, do not allow CDBs with a very large ALLOCATION 2003 * LENGTH. The real fix would be to modify scsi_read_data and 2004 * dma_buf_read, so that they return data beyond the buflen 2005 * as all zeros. 2006 */ 2007 if (req->cmd.xfer > 65536) { 2008 goto illegal_request; 2009 } 2010 r->buflen = MAX(4096, req->cmd.xfer); 2011 2012 if (!r->iov.iov_base) { 2013 r->iov.iov_base = blk_blockalign(s->qdev.conf.blk, r->buflen); 2014 } 2015 2016 outbuf = r->iov.iov_base; 2017 memset(outbuf, 0, r->buflen); 2018 switch (req->cmd.buf[0]) { 2019 case TEST_UNIT_READY: 2020 assert(blk_is_available(s->qdev.conf.blk)); 2021 break; 2022 case INQUIRY: 2023 buflen = scsi_disk_emulate_inquiry(req, outbuf); 2024 if (buflen < 0) { 2025 goto illegal_request; 2026 } 2027 break; 2028 case MODE_SENSE: 2029 case MODE_SENSE_10: 2030 buflen = scsi_disk_emulate_mode_sense(r, outbuf); 2031 if (buflen < 0) { 2032 goto illegal_request; 2033 } 2034 break; 2035 case READ_TOC: 2036 buflen = scsi_disk_emulate_read_toc(req, outbuf); 2037 if (buflen < 0) { 2038 goto illegal_request; 2039 } 2040 break; 2041 case RESERVE: 2042 if (req->cmd.buf[1] & 1) { 2043 goto illegal_request; 2044 } 2045 break; 2046 case RESERVE_10: 2047 if (req->cmd.buf[1] & 3) { 2048 goto illegal_request; 2049 } 2050 break; 2051 case RELEASE: 2052 if (req->cmd.buf[1] & 1) { 2053 goto illegal_request; 2054 } 2055 break; 2056 case RELEASE_10: 2057 if (req->cmd.buf[1] & 3) { 2058 goto illegal_request; 2059 } 2060 break; 2061 case START_STOP: 2062 if (scsi_disk_emulate_start_stop(r) < 0) { 2063 return 0; 2064 } 2065 break; 2066 case ALLOW_MEDIUM_REMOVAL: 2067 s->tray_locked = req->cmd.buf[4] & 1; 2068 blk_lock_medium(s->qdev.conf.blk, req->cmd.buf[4] & 1); 2069 break; 2070 case READ_CAPACITY_10: 2071 /* The normal LEN field for this command is zero. */ 2072 memset(outbuf, 0, 8); 2073 blk_get_geometry(s->qdev.conf.blk, &nb_sectors); 2074 if (!nb_sectors) { 2075 scsi_check_condition(r, SENSE_CODE(LUN_NOT_READY)); 2076 return 0; 2077 } 2078 if ((req->cmd.buf[8] & 1) == 0 && req->cmd.lba) { 2079 goto illegal_request; 2080 } 2081 nb_sectors /= s->qdev.blocksize / BDRV_SECTOR_SIZE; 2082 /* Returned value is the address of the last sector. */ 2083 nb_sectors--; 2084 /* Remember the new size for read/write sanity checking. */ 2085 s->qdev.max_lba = nb_sectors; 2086 /* Clip to 2TB, instead of returning capacity modulo 2TB. */ 2087 if (nb_sectors > UINT32_MAX) { 2088 nb_sectors = UINT32_MAX; 2089 } 2090 outbuf[0] = (nb_sectors >> 24) & 0xff; 2091 outbuf[1] = (nb_sectors >> 16) & 0xff; 2092 outbuf[2] = (nb_sectors >> 8) & 0xff; 2093 outbuf[3] = nb_sectors & 0xff; 2094 outbuf[4] = 0; 2095 outbuf[5] = 0; 2096 outbuf[6] = s->qdev.blocksize >> 8; 2097 outbuf[7] = 0; 2098 break; 2099 case REQUEST_SENSE: 2100 /* Just return "NO SENSE". */ 2101 buflen = scsi_convert_sense(NULL, 0, outbuf, r->buflen, 2102 (req->cmd.buf[1] & 1) == 0); 2103 if (buflen < 0) { 2104 goto illegal_request; 2105 } 2106 break; 2107 case MECHANISM_STATUS: 2108 buflen = scsi_emulate_mechanism_status(s, outbuf); 2109 if (buflen < 0) { 2110 goto illegal_request; 2111 } 2112 break; 2113 case GET_CONFIGURATION: 2114 buflen = scsi_get_configuration(s, outbuf); 2115 if (buflen < 0) { 2116 goto illegal_request; 2117 } 2118 break; 2119 case GET_EVENT_STATUS_NOTIFICATION: 2120 buflen = scsi_get_event_status_notification(s, r, outbuf); 2121 if (buflen < 0) { 2122 goto illegal_request; 2123 } 2124 break; 2125 case READ_DISC_INFORMATION: 2126 buflen = scsi_read_disc_information(s, r, outbuf); 2127 if (buflen < 0) { 2128 goto illegal_request; 2129 } 2130 break; 2131 case READ_DVD_STRUCTURE: 2132 buflen = scsi_read_dvd_structure(s, r, outbuf); 2133 if (buflen < 0) { 2134 goto illegal_request; 2135 } 2136 break; 2137 case SERVICE_ACTION_IN_16: 2138 /* Service Action In subcommands. */ 2139 if ((req->cmd.buf[1] & 31) == SAI_READ_CAPACITY_16) { 2140 trace_scsi_disk_emulate_command_SAI_16(); 2141 memset(outbuf, 0, req->cmd.xfer); 2142 blk_get_geometry(s->qdev.conf.blk, &nb_sectors); 2143 if (!nb_sectors) { 2144 scsi_check_condition(r, SENSE_CODE(LUN_NOT_READY)); 2145 return 0; 2146 } 2147 if ((req->cmd.buf[14] & 1) == 0 && req->cmd.lba) { 2148 goto illegal_request; 2149 } 2150 nb_sectors /= s->qdev.blocksize / BDRV_SECTOR_SIZE; 2151 /* Returned value is the address of the last sector. */ 2152 nb_sectors--; 2153 /* Remember the new size for read/write sanity checking. */ 2154 s->qdev.max_lba = nb_sectors; 2155 outbuf[0] = (nb_sectors >> 56) & 0xff; 2156 outbuf[1] = (nb_sectors >> 48) & 0xff; 2157 outbuf[2] = (nb_sectors >> 40) & 0xff; 2158 outbuf[3] = (nb_sectors >> 32) & 0xff; 2159 outbuf[4] = (nb_sectors >> 24) & 0xff; 2160 outbuf[5] = (nb_sectors >> 16) & 0xff; 2161 outbuf[6] = (nb_sectors >> 8) & 0xff; 2162 outbuf[7] = nb_sectors & 0xff; 2163 outbuf[8] = 0; 2164 outbuf[9] = 0; 2165 outbuf[10] = s->qdev.blocksize >> 8; 2166 outbuf[11] = 0; 2167 outbuf[12] = 0; 2168 outbuf[13] = get_physical_block_exp(&s->qdev.conf); 2169 2170 /* set TPE bit if the format supports discard */ 2171 if (s->qdev.conf.discard_granularity) { 2172 outbuf[14] = 0x80; 2173 } 2174 2175 /* Protection, exponent and lowest lba field left blank. */ 2176 break; 2177 } 2178 trace_scsi_disk_emulate_command_SAI_unsupported(); 2179 goto illegal_request; 2180 case SYNCHRONIZE_CACHE: 2181 /* The request is used as the AIO opaque value, so add a ref. */ 2182 scsi_req_ref(&r->req); 2183 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 0, 2184 BLOCK_ACCT_FLUSH); 2185 r->req.aiocb = blk_aio_flush(s->qdev.conf.blk, scsi_aio_complete, r); 2186 return 0; 2187 case SEEK_10: 2188 trace_scsi_disk_emulate_command_SEEK_10(r->req.cmd.lba); 2189 if (r->req.cmd.lba > s->qdev.max_lba) { 2190 goto illegal_lba; 2191 } 2192 break; 2193 case MODE_SELECT: 2194 trace_scsi_disk_emulate_command_MODE_SELECT(r->req.cmd.xfer); 2195 break; 2196 case MODE_SELECT_10: 2197 trace_scsi_disk_emulate_command_MODE_SELECT_10(r->req.cmd.xfer); 2198 break; 2199 case UNMAP: 2200 trace_scsi_disk_emulate_command_UNMAP(r->req.cmd.xfer); 2201 break; 2202 case VERIFY_10: 2203 case VERIFY_12: 2204 case VERIFY_16: 2205 trace_scsi_disk_emulate_command_VERIFY((req->cmd.buf[1] >> 1) & 3); 2206 if (req->cmd.buf[1] & 6) { 2207 goto illegal_request; 2208 } 2209 break; 2210 case WRITE_SAME_10: 2211 case WRITE_SAME_16: 2212 trace_scsi_disk_emulate_command_WRITE_SAME( 2213 req->cmd.buf[0] == WRITE_SAME_10 ? 10 : 16, r->req.cmd.xfer); 2214 break; 2215 case FORMAT_UNIT: 2216 trace_scsi_disk_emulate_command_FORMAT_UNIT(r->req.cmd.xfer); 2217 break; 2218 default: 2219 trace_scsi_disk_emulate_command_UNKNOWN(buf[0], 2220 scsi_command_name(buf[0])); 2221 scsi_check_condition(r, SENSE_CODE(INVALID_OPCODE)); 2222 return 0; 2223 } 2224 assert(!r->req.aiocb); 2225 r->iov.iov_len = MIN(r->buflen, req->cmd.xfer); 2226 if (r->iov.iov_len == 0) { 2227 scsi_req_complete(&r->req, GOOD); 2228 } 2229 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) { 2230 assert(r->iov.iov_len == req->cmd.xfer); 2231 return -r->iov.iov_len; 2232 } else { 2233 return r->iov.iov_len; 2234 } 2235 2236 illegal_request: 2237 if (r->req.status == -1) { 2238 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); 2239 } 2240 return 0; 2241 2242 illegal_lba: 2243 scsi_check_condition(r, SENSE_CODE(LBA_OUT_OF_RANGE)); 2244 return 0; 2245 } 2246 2247 /* Execute a scsi command. Returns the length of the data expected by the 2248 command. This will be Positive for data transfers from the device 2249 (eg. disk reads), negative for transfers to the device (eg. disk writes), 2250 and zero if the command does not transfer any data. */ 2251 2252 static int32_t scsi_disk_dma_command(SCSIRequest *req, uint8_t *buf) 2253 { 2254 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 2255 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); 2256 SCSIDiskClass *sdc = (SCSIDiskClass *) object_get_class(OBJECT(s)); 2257 uint32_t len; 2258 uint8_t command; 2259 2260 command = buf[0]; 2261 2262 if (!blk_is_available(s->qdev.conf.blk)) { 2263 scsi_check_condition(r, SENSE_CODE(NO_MEDIUM)); 2264 return 0; 2265 } 2266 2267 len = scsi_data_cdb_xfer(r->req.cmd.buf); 2268 switch (command) { 2269 case READ_6: 2270 case READ_10: 2271 case READ_12: 2272 case READ_16: 2273 trace_scsi_disk_dma_command_READ(r->req.cmd.lba, len); 2274 /* Protection information is not supported. For SCSI versions 2 and 2275 * older (as determined by snooping the guest's INQUIRY commands), 2276 * there is no RD/WR/VRPROTECT, so skip this check in these versions. 2277 */ 2278 if (s->qdev.scsi_version > 2 && (r->req.cmd.buf[1] & 0xe0)) { 2279 goto illegal_request; 2280 } 2281 if (!check_lba_range(s, r->req.cmd.lba, len)) { 2282 goto illegal_lba; 2283 } 2284 r->sector = r->req.cmd.lba * (s->qdev.blocksize / BDRV_SECTOR_SIZE); 2285 r->sector_count = len * (s->qdev.blocksize / BDRV_SECTOR_SIZE); 2286 break; 2287 case WRITE_6: 2288 case WRITE_10: 2289 case WRITE_12: 2290 case WRITE_16: 2291 case WRITE_VERIFY_10: 2292 case WRITE_VERIFY_12: 2293 case WRITE_VERIFY_16: 2294 if (!blk_is_writable(s->qdev.conf.blk)) { 2295 scsi_check_condition(r, SENSE_CODE(WRITE_PROTECTED)); 2296 return 0; 2297 } 2298 trace_scsi_disk_dma_command_WRITE( 2299 (command & 0xe) == 0xe ? "And Verify " : "", 2300 r->req.cmd.lba, len); 2301 /* fall through */ 2302 case VERIFY_10: 2303 case VERIFY_12: 2304 case VERIFY_16: 2305 /* We get here only for BYTCHK == 0x01 and only for scsi-block. 2306 * As far as DMA is concerned, we can treat it the same as a write; 2307 * scsi_block_do_sgio will send VERIFY commands. 2308 */ 2309 if (s->qdev.scsi_version > 2 && (r->req.cmd.buf[1] & 0xe0)) { 2310 goto illegal_request; 2311 } 2312 if (!check_lba_range(s, r->req.cmd.lba, len)) { 2313 goto illegal_lba; 2314 } 2315 r->sector = r->req.cmd.lba * (s->qdev.blocksize / BDRV_SECTOR_SIZE); 2316 r->sector_count = len * (s->qdev.blocksize / BDRV_SECTOR_SIZE); 2317 break; 2318 default: 2319 abort(); 2320 illegal_request: 2321 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); 2322 return 0; 2323 illegal_lba: 2324 scsi_check_condition(r, SENSE_CODE(LBA_OUT_OF_RANGE)); 2325 return 0; 2326 } 2327 r->need_fua_emulation = sdc->need_fua_emulation(&r->req.cmd); 2328 if (r->sector_count == 0) { 2329 scsi_req_complete(&r->req, GOOD); 2330 } 2331 assert(r->iov.iov_len == 0); 2332 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) { 2333 return -r->sector_count * BDRV_SECTOR_SIZE; 2334 } else { 2335 return r->sector_count * BDRV_SECTOR_SIZE; 2336 } 2337 } 2338 2339 static void scsi_disk_reset(DeviceState *dev) 2340 { 2341 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev.qdev, dev); 2342 uint64_t nb_sectors; 2343 AioContext *ctx; 2344 2345 scsi_device_purge_requests(&s->qdev, SENSE_CODE(RESET)); 2346 2347 ctx = blk_get_aio_context(s->qdev.conf.blk); 2348 aio_context_acquire(ctx); 2349 blk_get_geometry(s->qdev.conf.blk, &nb_sectors); 2350 aio_context_release(ctx); 2351 2352 nb_sectors /= s->qdev.blocksize / BDRV_SECTOR_SIZE; 2353 if (nb_sectors) { 2354 nb_sectors--; 2355 } 2356 s->qdev.max_lba = nb_sectors; 2357 /* reset tray statuses */ 2358 s->tray_locked = 0; 2359 s->tray_open = 0; 2360 2361 s->qdev.scsi_version = s->qdev.default_scsi_version; 2362 } 2363 2364 static void scsi_disk_drained_begin(void *opaque) 2365 { 2366 SCSIDiskState *s = opaque; 2367 2368 scsi_device_drained_begin(&s->qdev); 2369 } 2370 2371 static void scsi_disk_drained_end(void *opaque) 2372 { 2373 SCSIDiskState *s = opaque; 2374 2375 scsi_device_drained_end(&s->qdev); 2376 } 2377 2378 static void scsi_disk_resize_cb(void *opaque) 2379 { 2380 SCSIDiskState *s = opaque; 2381 2382 /* SPC lists this sense code as available only for 2383 * direct-access devices. 2384 */ 2385 if (s->qdev.type == TYPE_DISK) { 2386 scsi_device_report_change(&s->qdev, SENSE_CODE(CAPACITY_CHANGED)); 2387 } 2388 } 2389 2390 static void scsi_cd_change_media_cb(void *opaque, bool load, Error **errp) 2391 { 2392 SCSIDiskState *s = opaque; 2393 2394 /* 2395 * When a CD gets changed, we have to report an ejected state and 2396 * then a loaded state to guests so that they detect tray 2397 * open/close and media change events. Guests that do not use 2398 * GET_EVENT_STATUS_NOTIFICATION to detect such tray open/close 2399 * states rely on this behavior. 2400 * 2401 * media_changed governs the state machine used for unit attention 2402 * report. media_event is used by GET EVENT STATUS NOTIFICATION. 2403 */ 2404 s->media_changed = load; 2405 s->tray_open = !load; 2406 scsi_device_set_ua(&s->qdev, SENSE_CODE(UNIT_ATTENTION_NO_MEDIUM)); 2407 s->media_event = true; 2408 s->eject_request = false; 2409 } 2410 2411 static void scsi_cd_eject_request_cb(void *opaque, bool force) 2412 { 2413 SCSIDiskState *s = opaque; 2414 2415 s->eject_request = true; 2416 if (force) { 2417 s->tray_locked = false; 2418 } 2419 } 2420 2421 static bool scsi_cd_is_tray_open(void *opaque) 2422 { 2423 return ((SCSIDiskState *)opaque)->tray_open; 2424 } 2425 2426 static bool scsi_cd_is_medium_locked(void *opaque) 2427 { 2428 return ((SCSIDiskState *)opaque)->tray_locked; 2429 } 2430 2431 static const BlockDevOps scsi_disk_removable_block_ops = { 2432 .change_media_cb = scsi_cd_change_media_cb, 2433 .drained_begin = scsi_disk_drained_begin, 2434 .drained_end = scsi_disk_drained_end, 2435 .eject_request_cb = scsi_cd_eject_request_cb, 2436 .is_medium_locked = scsi_cd_is_medium_locked, 2437 .is_tray_open = scsi_cd_is_tray_open, 2438 .resize_cb = scsi_disk_resize_cb, 2439 }; 2440 2441 static const BlockDevOps scsi_disk_block_ops = { 2442 .drained_begin = scsi_disk_drained_begin, 2443 .drained_end = scsi_disk_drained_end, 2444 .resize_cb = scsi_disk_resize_cb, 2445 }; 2446 2447 static void scsi_disk_unit_attention_reported(SCSIDevice *dev) 2448 { 2449 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); 2450 if (s->media_changed) { 2451 s->media_changed = false; 2452 scsi_device_set_ua(&s->qdev, SENSE_CODE(MEDIUM_CHANGED)); 2453 } 2454 } 2455 2456 static void scsi_realize(SCSIDevice *dev, Error **errp) 2457 { 2458 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); 2459 bool read_only; 2460 2461 if (!s->qdev.conf.blk) { 2462 error_setg(errp, "drive property not set"); 2463 return; 2464 } 2465 2466 if (!(s->features & (1 << SCSI_DISK_F_REMOVABLE)) && 2467 !blk_is_inserted(s->qdev.conf.blk)) { 2468 error_setg(errp, "Device needs media, but drive is empty"); 2469 return; 2470 } 2471 2472 if (!blkconf_blocksizes(&s->qdev.conf, errp)) { 2473 return; 2474 } 2475 2476 if (blk_get_aio_context(s->qdev.conf.blk) != qemu_get_aio_context() && 2477 !s->qdev.hba_supports_iothread) 2478 { 2479 error_setg(errp, "HBA does not support iothreads"); 2480 return; 2481 } 2482 2483 if (dev->type == TYPE_DISK) { 2484 if (!blkconf_geometry(&dev->conf, NULL, 65535, 255, 255, errp)) { 2485 return; 2486 } 2487 } 2488 2489 read_only = !blk_supports_write_perm(s->qdev.conf.blk); 2490 if (dev->type == TYPE_ROM) { 2491 read_only = true; 2492 } 2493 2494 if (!blkconf_apply_backend_options(&dev->conf, read_only, 2495 dev->type == TYPE_DISK, errp)) { 2496 return; 2497 } 2498 2499 if (s->qdev.conf.discard_granularity == -1) { 2500 s->qdev.conf.discard_granularity = 2501 MAX(s->qdev.conf.logical_block_size, DEFAULT_DISCARD_GRANULARITY); 2502 } 2503 2504 if (!s->version) { 2505 s->version = g_strdup(qemu_hw_version()); 2506 } 2507 if (!s->vendor) { 2508 s->vendor = g_strdup("QEMU"); 2509 } 2510 if (!s->device_id) { 2511 if (s->serial) { 2512 s->device_id = g_strdup_printf("%.20s", s->serial); 2513 } else { 2514 const char *str = blk_name(s->qdev.conf.blk); 2515 if (str && *str) { 2516 s->device_id = g_strdup(str); 2517 } 2518 } 2519 } 2520 2521 if (blk_is_sg(s->qdev.conf.blk)) { 2522 error_setg(errp, "unwanted /dev/sg*"); 2523 return; 2524 } 2525 2526 if ((s->features & (1 << SCSI_DISK_F_REMOVABLE)) && 2527 !(s->features & (1 << SCSI_DISK_F_NO_REMOVABLE_DEVOPS))) { 2528 blk_set_dev_ops(s->qdev.conf.blk, &scsi_disk_removable_block_ops, s); 2529 } else { 2530 blk_set_dev_ops(s->qdev.conf.blk, &scsi_disk_block_ops, s); 2531 } 2532 2533 blk_iostatus_enable(s->qdev.conf.blk); 2534 2535 add_boot_device_lchs(&dev->qdev, NULL, 2536 dev->conf.lcyls, 2537 dev->conf.lheads, 2538 dev->conf.lsecs); 2539 } 2540 2541 static void scsi_unrealize(SCSIDevice *dev) 2542 { 2543 del_boot_device_lchs(&dev->qdev, NULL); 2544 } 2545 2546 static void scsi_hd_realize(SCSIDevice *dev, Error **errp) 2547 { 2548 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); 2549 AioContext *ctx = NULL; 2550 /* can happen for devices without drive. The error message for missing 2551 * backend will be issued in scsi_realize 2552 */ 2553 if (s->qdev.conf.blk) { 2554 ctx = blk_get_aio_context(s->qdev.conf.blk); 2555 aio_context_acquire(ctx); 2556 if (!blkconf_blocksizes(&s->qdev.conf, errp)) { 2557 goto out; 2558 } 2559 } 2560 s->qdev.blocksize = s->qdev.conf.logical_block_size; 2561 s->qdev.type = TYPE_DISK; 2562 if (!s->product) { 2563 s->product = g_strdup("QEMU HARDDISK"); 2564 } 2565 scsi_realize(&s->qdev, errp); 2566 out: 2567 if (ctx) { 2568 aio_context_release(ctx); 2569 } 2570 } 2571 2572 static void scsi_cd_realize(SCSIDevice *dev, Error **errp) 2573 { 2574 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); 2575 AioContext *ctx; 2576 int ret; 2577 uint32_t blocksize = 2048; 2578 2579 if (!dev->conf.blk) { 2580 /* Anonymous BlockBackend for an empty drive. As we put it into 2581 * dev->conf, qdev takes care of detaching on unplug. */ 2582 dev->conf.blk = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL); 2583 ret = blk_attach_dev(dev->conf.blk, &dev->qdev); 2584 assert(ret == 0); 2585 } 2586 2587 if (dev->conf.physical_block_size != 0) { 2588 blocksize = dev->conf.physical_block_size; 2589 } 2590 2591 ctx = blk_get_aio_context(dev->conf.blk); 2592 aio_context_acquire(ctx); 2593 s->qdev.blocksize = blocksize; 2594 s->qdev.type = TYPE_ROM; 2595 s->features |= 1 << SCSI_DISK_F_REMOVABLE; 2596 if (!s->product) { 2597 s->product = g_strdup("QEMU CD-ROM"); 2598 } 2599 scsi_realize(&s->qdev, errp); 2600 aio_context_release(ctx); 2601 } 2602 2603 2604 static const SCSIReqOps scsi_disk_emulate_reqops = { 2605 .size = sizeof(SCSIDiskReq), 2606 .free_req = scsi_free_request, 2607 .send_command = scsi_disk_emulate_command, 2608 .read_data = scsi_disk_emulate_read_data, 2609 .write_data = scsi_disk_emulate_write_data, 2610 .get_buf = scsi_get_buf, 2611 }; 2612 2613 static const SCSIReqOps scsi_disk_dma_reqops = { 2614 .size = sizeof(SCSIDiskReq), 2615 .free_req = scsi_free_request, 2616 .send_command = scsi_disk_dma_command, 2617 .read_data = scsi_read_data, 2618 .write_data = scsi_write_data, 2619 .get_buf = scsi_get_buf, 2620 .load_request = scsi_disk_load_request, 2621 .save_request = scsi_disk_save_request, 2622 }; 2623 2624 static const SCSIReqOps *const scsi_disk_reqops_dispatch[256] = { 2625 [TEST_UNIT_READY] = &scsi_disk_emulate_reqops, 2626 [INQUIRY] = &scsi_disk_emulate_reqops, 2627 [MODE_SENSE] = &scsi_disk_emulate_reqops, 2628 [MODE_SENSE_10] = &scsi_disk_emulate_reqops, 2629 [START_STOP] = &scsi_disk_emulate_reqops, 2630 [ALLOW_MEDIUM_REMOVAL] = &scsi_disk_emulate_reqops, 2631 [READ_CAPACITY_10] = &scsi_disk_emulate_reqops, 2632 [READ_TOC] = &scsi_disk_emulate_reqops, 2633 [READ_DVD_STRUCTURE] = &scsi_disk_emulate_reqops, 2634 [READ_DISC_INFORMATION] = &scsi_disk_emulate_reqops, 2635 [GET_CONFIGURATION] = &scsi_disk_emulate_reqops, 2636 [GET_EVENT_STATUS_NOTIFICATION] = &scsi_disk_emulate_reqops, 2637 [MECHANISM_STATUS] = &scsi_disk_emulate_reqops, 2638 [SERVICE_ACTION_IN_16] = &scsi_disk_emulate_reqops, 2639 [REQUEST_SENSE] = &scsi_disk_emulate_reqops, 2640 [SYNCHRONIZE_CACHE] = &scsi_disk_emulate_reqops, 2641 [SEEK_10] = &scsi_disk_emulate_reqops, 2642 [MODE_SELECT] = &scsi_disk_emulate_reqops, 2643 [MODE_SELECT_10] = &scsi_disk_emulate_reqops, 2644 [UNMAP] = &scsi_disk_emulate_reqops, 2645 [WRITE_SAME_10] = &scsi_disk_emulate_reqops, 2646 [WRITE_SAME_16] = &scsi_disk_emulate_reqops, 2647 [VERIFY_10] = &scsi_disk_emulate_reqops, 2648 [VERIFY_12] = &scsi_disk_emulate_reqops, 2649 [VERIFY_16] = &scsi_disk_emulate_reqops, 2650 [FORMAT_UNIT] = &scsi_disk_emulate_reqops, 2651 2652 [READ_6] = &scsi_disk_dma_reqops, 2653 [READ_10] = &scsi_disk_dma_reqops, 2654 [READ_12] = &scsi_disk_dma_reqops, 2655 [READ_16] = &scsi_disk_dma_reqops, 2656 [WRITE_6] = &scsi_disk_dma_reqops, 2657 [WRITE_10] = &scsi_disk_dma_reqops, 2658 [WRITE_12] = &scsi_disk_dma_reqops, 2659 [WRITE_16] = &scsi_disk_dma_reqops, 2660 [WRITE_VERIFY_10] = &scsi_disk_dma_reqops, 2661 [WRITE_VERIFY_12] = &scsi_disk_dma_reqops, 2662 [WRITE_VERIFY_16] = &scsi_disk_dma_reqops, 2663 }; 2664 2665 static void scsi_disk_new_request_dump(uint32_t lun, uint32_t tag, uint8_t *buf) 2666 { 2667 int i; 2668 int len = scsi_cdb_length(buf); 2669 char *line_buffer, *p; 2670 2671 assert(len > 0 && len <= 16); 2672 line_buffer = g_malloc(len * 5 + 1); 2673 2674 for (i = 0, p = line_buffer; i < len; i++) { 2675 p += sprintf(p, " 0x%02x", buf[i]); 2676 } 2677 trace_scsi_disk_new_request(lun, tag, line_buffer); 2678 2679 g_free(line_buffer); 2680 } 2681 2682 static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun, 2683 uint8_t *buf, void *hba_private) 2684 { 2685 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); 2686 SCSIRequest *req; 2687 const SCSIReqOps *ops; 2688 uint8_t command; 2689 2690 command = buf[0]; 2691 ops = scsi_disk_reqops_dispatch[command]; 2692 if (!ops) { 2693 ops = &scsi_disk_emulate_reqops; 2694 } 2695 req = scsi_req_alloc(ops, &s->qdev, tag, lun, hba_private); 2696 2697 if (trace_event_get_state_backends(TRACE_SCSI_DISK_NEW_REQUEST)) { 2698 scsi_disk_new_request_dump(lun, tag, buf); 2699 } 2700 2701 return req; 2702 } 2703 2704 #ifdef __linux__ 2705 static int get_device_type(SCSIDiskState *s) 2706 { 2707 uint8_t cmd[16]; 2708 uint8_t buf[36]; 2709 int ret; 2710 2711 memset(cmd, 0, sizeof(cmd)); 2712 memset(buf, 0, sizeof(buf)); 2713 cmd[0] = INQUIRY; 2714 cmd[4] = sizeof(buf); 2715 2716 ret = scsi_SG_IO_FROM_DEV(s->qdev.conf.blk, cmd, sizeof(cmd), 2717 buf, sizeof(buf), s->qdev.io_timeout); 2718 if (ret < 0) { 2719 return -1; 2720 } 2721 s->qdev.type = buf[0]; 2722 if (buf[1] & 0x80) { 2723 s->features |= 1 << SCSI_DISK_F_REMOVABLE; 2724 } 2725 return 0; 2726 } 2727 2728 static void scsi_block_realize(SCSIDevice *dev, Error **errp) 2729 { 2730 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); 2731 AioContext *ctx; 2732 int sg_version; 2733 int rc; 2734 2735 if (!s->qdev.conf.blk) { 2736 error_setg(errp, "drive property not set"); 2737 return; 2738 } 2739 2740 if (s->rotation_rate) { 2741 error_report_once("rotation_rate is specified for scsi-block but is " 2742 "not implemented. This option is deprecated and will " 2743 "be removed in a future version"); 2744 } 2745 2746 ctx = blk_get_aio_context(s->qdev.conf.blk); 2747 aio_context_acquire(ctx); 2748 2749 /* check we are using a driver managing SG_IO (version 3 and after) */ 2750 rc = blk_ioctl(s->qdev.conf.blk, SG_GET_VERSION_NUM, &sg_version); 2751 if (rc < 0) { 2752 error_setg_errno(errp, -rc, "cannot get SG_IO version number"); 2753 if (rc != -EPERM) { 2754 error_append_hint(errp, "Is this a SCSI device?\n"); 2755 } 2756 goto out; 2757 } 2758 if (sg_version < 30000) { 2759 error_setg(errp, "scsi generic interface too old"); 2760 goto out; 2761 } 2762 2763 /* get device type from INQUIRY data */ 2764 rc = get_device_type(s); 2765 if (rc < 0) { 2766 error_setg(errp, "INQUIRY failed"); 2767 goto out; 2768 } 2769 2770 /* Make a guess for the block size, we'll fix it when the guest sends. 2771 * READ CAPACITY. If they don't, they likely would assume these sizes 2772 * anyway. (TODO: check in /sys). 2773 */ 2774 if (s->qdev.type == TYPE_ROM || s->qdev.type == TYPE_WORM) { 2775 s->qdev.blocksize = 2048; 2776 } else { 2777 s->qdev.blocksize = 512; 2778 } 2779 2780 /* Makes the scsi-block device not removable by using HMP and QMP eject 2781 * command. 2782 */ 2783 s->features |= (1 << SCSI_DISK_F_NO_REMOVABLE_DEVOPS); 2784 2785 scsi_realize(&s->qdev, errp); 2786 scsi_generic_read_device_inquiry(&s->qdev); 2787 2788 out: 2789 aio_context_release(ctx); 2790 } 2791 2792 typedef struct SCSIBlockReq { 2793 SCSIDiskReq req; 2794 sg_io_hdr_t io_header; 2795 2796 /* Selected bytes of the original CDB, copied into our own CDB. */ 2797 uint8_t cmd, cdb1, group_number; 2798 2799 /* CDB passed to SG_IO. */ 2800 uint8_t cdb[16]; 2801 BlockCompletionFunc *cb; 2802 void *cb_opaque; 2803 } SCSIBlockReq; 2804 2805 static void scsi_block_sgio_complete(void *opaque, int ret) 2806 { 2807 SCSIBlockReq *req = (SCSIBlockReq *)opaque; 2808 SCSIDiskReq *r = &req->req; 2809 SCSIDevice *s = r->req.dev; 2810 sg_io_hdr_t *io_hdr = &req->io_header; 2811 2812 if (ret == 0) { 2813 if (io_hdr->host_status != SCSI_HOST_OK) { 2814 scsi_req_complete_failed(&r->req, io_hdr->host_status); 2815 scsi_req_unref(&r->req); 2816 return; 2817 } 2818 2819 if (io_hdr->driver_status & SG_ERR_DRIVER_TIMEOUT) { 2820 ret = BUSY; 2821 } else { 2822 ret = io_hdr->status; 2823 } 2824 2825 if (ret > 0) { 2826 aio_context_acquire(blk_get_aio_context(s->conf.blk)); 2827 if (scsi_handle_rw_error(r, ret, true)) { 2828 aio_context_release(blk_get_aio_context(s->conf.blk)); 2829 scsi_req_unref(&r->req); 2830 return; 2831 } 2832 aio_context_release(blk_get_aio_context(s->conf.blk)); 2833 2834 /* Ignore error. */ 2835 ret = 0; 2836 } 2837 } 2838 2839 req->cb(req->cb_opaque, ret); 2840 } 2841 2842 static BlockAIOCB *scsi_block_do_sgio(SCSIBlockReq *req, 2843 int64_t offset, QEMUIOVector *iov, 2844 int direction, 2845 BlockCompletionFunc *cb, void *opaque) 2846 { 2847 sg_io_hdr_t *io_header = &req->io_header; 2848 SCSIDiskReq *r = &req->req; 2849 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 2850 int nb_logical_blocks; 2851 uint64_t lba; 2852 BlockAIOCB *aiocb; 2853 2854 /* This is not supported yet. It can only happen if the guest does 2855 * reads and writes that are not aligned to one logical sectors 2856 * _and_ cover multiple MemoryRegions. 2857 */ 2858 assert(offset % s->qdev.blocksize == 0); 2859 assert(iov->size % s->qdev.blocksize == 0); 2860 2861 io_header->interface_id = 'S'; 2862 2863 /* The data transfer comes from the QEMUIOVector. */ 2864 io_header->dxfer_direction = direction; 2865 io_header->dxfer_len = iov->size; 2866 io_header->dxferp = (void *)iov->iov; 2867 io_header->iovec_count = iov->niov; 2868 assert(io_header->iovec_count == iov->niov); /* no overflow! */ 2869 2870 /* Build a new CDB with the LBA and length patched in, in case 2871 * DMA helpers split the transfer in multiple segments. Do not 2872 * build a CDB smaller than what the guest wanted, and only build 2873 * a larger one if strictly necessary. 2874 */ 2875 io_header->cmdp = req->cdb; 2876 lba = offset / s->qdev.blocksize; 2877 nb_logical_blocks = io_header->dxfer_len / s->qdev.blocksize; 2878 2879 if ((req->cmd >> 5) == 0 && lba <= 0x1ffff) { 2880 /* 6-byte CDB */ 2881 stl_be_p(&req->cdb[0], lba | (req->cmd << 24)); 2882 req->cdb[4] = nb_logical_blocks; 2883 req->cdb[5] = 0; 2884 io_header->cmd_len = 6; 2885 } else if ((req->cmd >> 5) <= 1 && lba <= 0xffffffffULL) { 2886 /* 10-byte CDB */ 2887 req->cdb[0] = (req->cmd & 0x1f) | 0x20; 2888 req->cdb[1] = req->cdb1; 2889 stl_be_p(&req->cdb[2], lba); 2890 req->cdb[6] = req->group_number; 2891 stw_be_p(&req->cdb[7], nb_logical_blocks); 2892 req->cdb[9] = 0; 2893 io_header->cmd_len = 10; 2894 } else if ((req->cmd >> 5) != 4 && lba <= 0xffffffffULL) { 2895 /* 12-byte CDB */ 2896 req->cdb[0] = (req->cmd & 0x1f) | 0xA0; 2897 req->cdb[1] = req->cdb1; 2898 stl_be_p(&req->cdb[2], lba); 2899 stl_be_p(&req->cdb[6], nb_logical_blocks); 2900 req->cdb[10] = req->group_number; 2901 req->cdb[11] = 0; 2902 io_header->cmd_len = 12; 2903 } else { 2904 /* 16-byte CDB */ 2905 req->cdb[0] = (req->cmd & 0x1f) | 0x80; 2906 req->cdb[1] = req->cdb1; 2907 stq_be_p(&req->cdb[2], lba); 2908 stl_be_p(&req->cdb[10], nb_logical_blocks); 2909 req->cdb[14] = req->group_number; 2910 req->cdb[15] = 0; 2911 io_header->cmd_len = 16; 2912 } 2913 2914 /* The rest is as in scsi-generic.c. */ 2915 io_header->mx_sb_len = sizeof(r->req.sense); 2916 io_header->sbp = r->req.sense; 2917 io_header->timeout = s->qdev.io_timeout * 1000; 2918 io_header->usr_ptr = r; 2919 io_header->flags |= SG_FLAG_DIRECT_IO; 2920 req->cb = cb; 2921 req->cb_opaque = opaque; 2922 trace_scsi_disk_aio_sgio_command(r->req.tag, req->cdb[0], lba, 2923 nb_logical_blocks, io_header->timeout); 2924 aiocb = blk_aio_ioctl(s->qdev.conf.blk, SG_IO, io_header, scsi_block_sgio_complete, req); 2925 assert(aiocb != NULL); 2926 return aiocb; 2927 } 2928 2929 static bool scsi_block_no_fua(SCSICommand *cmd) 2930 { 2931 return false; 2932 } 2933 2934 static BlockAIOCB *scsi_block_dma_readv(int64_t offset, 2935 QEMUIOVector *iov, 2936 BlockCompletionFunc *cb, void *cb_opaque, 2937 void *opaque) 2938 { 2939 SCSIBlockReq *r = opaque; 2940 return scsi_block_do_sgio(r, offset, iov, 2941 SG_DXFER_FROM_DEV, cb, cb_opaque); 2942 } 2943 2944 static BlockAIOCB *scsi_block_dma_writev(int64_t offset, 2945 QEMUIOVector *iov, 2946 BlockCompletionFunc *cb, void *cb_opaque, 2947 void *opaque) 2948 { 2949 SCSIBlockReq *r = opaque; 2950 return scsi_block_do_sgio(r, offset, iov, 2951 SG_DXFER_TO_DEV, cb, cb_opaque); 2952 } 2953 2954 static bool scsi_block_is_passthrough(SCSIDiskState *s, uint8_t *buf) 2955 { 2956 switch (buf[0]) { 2957 case VERIFY_10: 2958 case VERIFY_12: 2959 case VERIFY_16: 2960 /* Check if BYTCHK == 0x01 (data-out buffer contains data 2961 * for the number of logical blocks specified in the length 2962 * field). For other modes, do not use scatter/gather operation. 2963 */ 2964 if ((buf[1] & 6) == 2) { 2965 return false; 2966 } 2967 break; 2968 2969 case READ_6: 2970 case READ_10: 2971 case READ_12: 2972 case READ_16: 2973 case WRITE_6: 2974 case WRITE_10: 2975 case WRITE_12: 2976 case WRITE_16: 2977 case WRITE_VERIFY_10: 2978 case WRITE_VERIFY_12: 2979 case WRITE_VERIFY_16: 2980 /* MMC writing cannot be done via DMA helpers, because it sometimes 2981 * involves writing beyond the maximum LBA or to negative LBA (lead-in). 2982 * We might use scsi_block_dma_reqops as long as no writing commands are 2983 * seen, but performance usually isn't paramount on optical media. So, 2984 * just make scsi-block operate the same as scsi-generic for them. 2985 */ 2986 if (s->qdev.type != TYPE_ROM) { 2987 return false; 2988 } 2989 break; 2990 2991 default: 2992 break; 2993 } 2994 2995 return true; 2996 } 2997 2998 2999 static int32_t scsi_block_dma_command(SCSIRequest *req, uint8_t *buf) 3000 { 3001 SCSIBlockReq *r = (SCSIBlockReq *)req; 3002 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); 3003 3004 r->cmd = req->cmd.buf[0]; 3005 switch (r->cmd >> 5) { 3006 case 0: 3007 /* 6-byte CDB. */ 3008 r->cdb1 = r->group_number = 0; 3009 break; 3010 case 1: 3011 /* 10-byte CDB. */ 3012 r->cdb1 = req->cmd.buf[1]; 3013 r->group_number = req->cmd.buf[6]; 3014 break; 3015 case 4: 3016 /* 12-byte CDB. */ 3017 r->cdb1 = req->cmd.buf[1]; 3018 r->group_number = req->cmd.buf[10]; 3019 break; 3020 case 5: 3021 /* 16-byte CDB. */ 3022 r->cdb1 = req->cmd.buf[1]; 3023 r->group_number = req->cmd.buf[14]; 3024 break; 3025 default: 3026 abort(); 3027 } 3028 3029 /* Protection information is not supported. For SCSI versions 2 and 3030 * older (as determined by snooping the guest's INQUIRY commands), 3031 * there is no RD/WR/VRPROTECT, so skip this check in these versions. 3032 */ 3033 if (s->qdev.scsi_version > 2 && (req->cmd.buf[1] & 0xe0)) { 3034 scsi_check_condition(&r->req, SENSE_CODE(INVALID_FIELD)); 3035 return 0; 3036 } 3037 3038 return scsi_disk_dma_command(req, buf); 3039 } 3040 3041 static const SCSIReqOps scsi_block_dma_reqops = { 3042 .size = sizeof(SCSIBlockReq), 3043 .free_req = scsi_free_request, 3044 .send_command = scsi_block_dma_command, 3045 .read_data = scsi_read_data, 3046 .write_data = scsi_write_data, 3047 .get_buf = scsi_get_buf, 3048 .load_request = scsi_disk_load_request, 3049 .save_request = scsi_disk_save_request, 3050 }; 3051 3052 static SCSIRequest *scsi_block_new_request(SCSIDevice *d, uint32_t tag, 3053 uint32_t lun, uint8_t *buf, 3054 void *hba_private) 3055 { 3056 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); 3057 3058 if (scsi_block_is_passthrough(s, buf)) { 3059 return scsi_req_alloc(&scsi_generic_req_ops, &s->qdev, tag, lun, 3060 hba_private); 3061 } else { 3062 return scsi_req_alloc(&scsi_block_dma_reqops, &s->qdev, tag, lun, 3063 hba_private); 3064 } 3065 } 3066 3067 static int scsi_block_parse_cdb(SCSIDevice *d, SCSICommand *cmd, 3068 uint8_t *buf, size_t buf_len, 3069 void *hba_private) 3070 { 3071 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); 3072 3073 if (scsi_block_is_passthrough(s, buf)) { 3074 return scsi_bus_parse_cdb(&s->qdev, cmd, buf, buf_len, hba_private); 3075 } else { 3076 return scsi_req_parse_cdb(&s->qdev, cmd, buf, buf_len); 3077 } 3078 } 3079 3080 static void scsi_block_update_sense(SCSIRequest *req) 3081 { 3082 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 3083 SCSIBlockReq *br = DO_UPCAST(SCSIBlockReq, req, r); 3084 r->req.sense_len = MIN(br->io_header.sb_len_wr, sizeof(r->req.sense)); 3085 } 3086 #endif 3087 3088 static 3089 BlockAIOCB *scsi_dma_readv(int64_t offset, QEMUIOVector *iov, 3090 BlockCompletionFunc *cb, void *cb_opaque, 3091 void *opaque) 3092 { 3093 SCSIDiskReq *r = opaque; 3094 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 3095 return blk_aio_preadv(s->qdev.conf.blk, offset, iov, 0, cb, cb_opaque); 3096 } 3097 3098 static 3099 BlockAIOCB *scsi_dma_writev(int64_t offset, QEMUIOVector *iov, 3100 BlockCompletionFunc *cb, void *cb_opaque, 3101 void *opaque) 3102 { 3103 SCSIDiskReq *r = opaque; 3104 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 3105 return blk_aio_pwritev(s->qdev.conf.blk, offset, iov, 0, cb, cb_opaque); 3106 } 3107 3108 static void scsi_disk_base_class_initfn(ObjectClass *klass, void *data) 3109 { 3110 DeviceClass *dc = DEVICE_CLASS(klass); 3111 SCSIDiskClass *sdc = SCSI_DISK_BASE_CLASS(klass); 3112 3113 dc->fw_name = "disk"; 3114 dc->reset = scsi_disk_reset; 3115 sdc->dma_readv = scsi_dma_readv; 3116 sdc->dma_writev = scsi_dma_writev; 3117 sdc->need_fua_emulation = scsi_is_cmd_fua; 3118 } 3119 3120 static const TypeInfo scsi_disk_base_info = { 3121 .name = TYPE_SCSI_DISK_BASE, 3122 .parent = TYPE_SCSI_DEVICE, 3123 .class_init = scsi_disk_base_class_initfn, 3124 .instance_size = sizeof(SCSIDiskState), 3125 .class_size = sizeof(SCSIDiskClass), 3126 .abstract = true, 3127 }; 3128 3129 #define DEFINE_SCSI_DISK_PROPERTIES() \ 3130 DEFINE_PROP_DRIVE_IOTHREAD("drive", SCSIDiskState, qdev.conf.blk), \ 3131 DEFINE_BLOCK_PROPERTIES_BASE(SCSIDiskState, qdev.conf), \ 3132 DEFINE_BLOCK_ERROR_PROPERTIES(SCSIDiskState, qdev.conf), \ 3133 DEFINE_PROP_STRING("ver", SCSIDiskState, version), \ 3134 DEFINE_PROP_STRING("serial", SCSIDiskState, serial), \ 3135 DEFINE_PROP_STRING("vendor", SCSIDiskState, vendor), \ 3136 DEFINE_PROP_STRING("product", SCSIDiskState, product), \ 3137 DEFINE_PROP_STRING("device_id", SCSIDiskState, device_id) 3138 3139 3140 static Property scsi_hd_properties[] = { 3141 DEFINE_SCSI_DISK_PROPERTIES(), 3142 DEFINE_PROP_BIT("removable", SCSIDiskState, features, 3143 SCSI_DISK_F_REMOVABLE, false), 3144 DEFINE_PROP_BIT("dpofua", SCSIDiskState, features, 3145 SCSI_DISK_F_DPOFUA, false), 3146 DEFINE_PROP_UINT64("wwn", SCSIDiskState, qdev.wwn, 0), 3147 DEFINE_PROP_UINT64("port_wwn", SCSIDiskState, qdev.port_wwn, 0), 3148 DEFINE_PROP_UINT16("port_index", SCSIDiskState, port_index, 0), 3149 DEFINE_PROP_UINT64("max_unmap_size", SCSIDiskState, max_unmap_size, 3150 DEFAULT_MAX_UNMAP_SIZE), 3151 DEFINE_PROP_UINT64("max_io_size", SCSIDiskState, max_io_size, 3152 DEFAULT_MAX_IO_SIZE), 3153 DEFINE_PROP_UINT16("rotation_rate", SCSIDiskState, rotation_rate, 0), 3154 DEFINE_PROP_INT32("scsi_version", SCSIDiskState, qdev.default_scsi_version, 3155 5), 3156 DEFINE_PROP_BIT("quirk_mode_page_vendor_specific_apple", SCSIDiskState, 3157 quirks, SCSI_DISK_QUIRK_MODE_PAGE_VENDOR_SPECIFIC_APPLE, 3158 0), 3159 DEFINE_BLOCK_CHS_PROPERTIES(SCSIDiskState, qdev.conf), 3160 DEFINE_PROP_END_OF_LIST(), 3161 }; 3162 3163 static const VMStateDescription vmstate_scsi_disk_state = { 3164 .name = "scsi-disk", 3165 .version_id = 1, 3166 .minimum_version_id = 1, 3167 .fields = (VMStateField[]) { 3168 VMSTATE_SCSI_DEVICE(qdev, SCSIDiskState), 3169 VMSTATE_BOOL(media_changed, SCSIDiskState), 3170 VMSTATE_BOOL(media_event, SCSIDiskState), 3171 VMSTATE_BOOL(eject_request, SCSIDiskState), 3172 VMSTATE_BOOL(tray_open, SCSIDiskState), 3173 VMSTATE_BOOL(tray_locked, SCSIDiskState), 3174 VMSTATE_END_OF_LIST() 3175 } 3176 }; 3177 3178 static void scsi_hd_class_initfn(ObjectClass *klass, void *data) 3179 { 3180 DeviceClass *dc = DEVICE_CLASS(klass); 3181 SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass); 3182 3183 sc->realize = scsi_hd_realize; 3184 sc->unrealize = scsi_unrealize; 3185 sc->alloc_req = scsi_new_request; 3186 sc->unit_attention_reported = scsi_disk_unit_attention_reported; 3187 dc->desc = "virtual SCSI disk"; 3188 device_class_set_props(dc, scsi_hd_properties); 3189 dc->vmsd = &vmstate_scsi_disk_state; 3190 } 3191 3192 static const TypeInfo scsi_hd_info = { 3193 .name = "scsi-hd", 3194 .parent = TYPE_SCSI_DISK_BASE, 3195 .class_init = scsi_hd_class_initfn, 3196 }; 3197 3198 static Property scsi_cd_properties[] = { 3199 DEFINE_SCSI_DISK_PROPERTIES(), 3200 DEFINE_PROP_UINT64("wwn", SCSIDiskState, qdev.wwn, 0), 3201 DEFINE_PROP_UINT64("port_wwn", SCSIDiskState, qdev.port_wwn, 0), 3202 DEFINE_PROP_UINT16("port_index", SCSIDiskState, port_index, 0), 3203 DEFINE_PROP_UINT64("max_io_size", SCSIDiskState, max_io_size, 3204 DEFAULT_MAX_IO_SIZE), 3205 DEFINE_PROP_INT32("scsi_version", SCSIDiskState, qdev.default_scsi_version, 3206 5), 3207 DEFINE_PROP_BIT("quirk_mode_page_apple_vendor", SCSIDiskState, quirks, 3208 SCSI_DISK_QUIRK_MODE_PAGE_APPLE_VENDOR, 0), 3209 DEFINE_PROP_BIT("quirk_mode_sense_rom_use_dbd", SCSIDiskState, quirks, 3210 SCSI_DISK_QUIRK_MODE_SENSE_ROM_USE_DBD, 0), 3211 DEFINE_PROP_BIT("quirk_mode_page_vendor_specific_apple", SCSIDiskState, 3212 quirks, SCSI_DISK_QUIRK_MODE_PAGE_VENDOR_SPECIFIC_APPLE, 3213 0), 3214 DEFINE_PROP_BIT("quirk_mode_page_truncated", SCSIDiskState, quirks, 3215 SCSI_DISK_QUIRK_MODE_PAGE_TRUNCATED, 0), 3216 DEFINE_PROP_END_OF_LIST(), 3217 }; 3218 3219 static void scsi_cd_class_initfn(ObjectClass *klass, void *data) 3220 { 3221 DeviceClass *dc = DEVICE_CLASS(klass); 3222 SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass); 3223 3224 sc->realize = scsi_cd_realize; 3225 sc->alloc_req = scsi_new_request; 3226 sc->unit_attention_reported = scsi_disk_unit_attention_reported; 3227 dc->desc = "virtual SCSI CD-ROM"; 3228 device_class_set_props(dc, scsi_cd_properties); 3229 dc->vmsd = &vmstate_scsi_disk_state; 3230 } 3231 3232 static const TypeInfo scsi_cd_info = { 3233 .name = "scsi-cd", 3234 .parent = TYPE_SCSI_DISK_BASE, 3235 .class_init = scsi_cd_class_initfn, 3236 }; 3237 3238 #ifdef __linux__ 3239 static Property scsi_block_properties[] = { 3240 DEFINE_BLOCK_ERROR_PROPERTIES(SCSIDiskState, qdev.conf), 3241 DEFINE_PROP_DRIVE("drive", SCSIDiskState, qdev.conf.blk), 3242 DEFINE_PROP_BOOL("share-rw", SCSIDiskState, qdev.conf.share_rw, false), 3243 DEFINE_PROP_UINT16("rotation_rate", SCSIDiskState, rotation_rate, 0), 3244 DEFINE_PROP_UINT64("max_unmap_size", SCSIDiskState, max_unmap_size, 3245 DEFAULT_MAX_UNMAP_SIZE), 3246 DEFINE_PROP_UINT64("max_io_size", SCSIDiskState, max_io_size, 3247 DEFAULT_MAX_IO_SIZE), 3248 DEFINE_PROP_INT32("scsi_version", SCSIDiskState, qdev.default_scsi_version, 3249 -1), 3250 DEFINE_PROP_UINT32("io_timeout", SCSIDiskState, qdev.io_timeout, 3251 DEFAULT_IO_TIMEOUT), 3252 DEFINE_PROP_END_OF_LIST(), 3253 }; 3254 3255 static void scsi_block_class_initfn(ObjectClass *klass, void *data) 3256 { 3257 DeviceClass *dc = DEVICE_CLASS(klass); 3258 SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass); 3259 SCSIDiskClass *sdc = SCSI_DISK_BASE_CLASS(klass); 3260 3261 sc->realize = scsi_block_realize; 3262 sc->alloc_req = scsi_block_new_request; 3263 sc->parse_cdb = scsi_block_parse_cdb; 3264 sdc->dma_readv = scsi_block_dma_readv; 3265 sdc->dma_writev = scsi_block_dma_writev; 3266 sdc->update_sense = scsi_block_update_sense; 3267 sdc->need_fua_emulation = scsi_block_no_fua; 3268 dc->desc = "SCSI block device passthrough"; 3269 device_class_set_props(dc, scsi_block_properties); 3270 dc->vmsd = &vmstate_scsi_disk_state; 3271 } 3272 3273 static const TypeInfo scsi_block_info = { 3274 .name = "scsi-block", 3275 .parent = TYPE_SCSI_DISK_BASE, 3276 .class_init = scsi_block_class_initfn, 3277 }; 3278 #endif 3279 3280 static void scsi_disk_register_types(void) 3281 { 3282 type_register_static(&scsi_disk_base_info); 3283 type_register_static(&scsi_hd_info); 3284 type_register_static(&scsi_cd_info); 3285 #ifdef __linux__ 3286 type_register_static(&scsi_block_info); 3287 #endif 3288 } 3289 3290 type_init(scsi_disk_register_types) 3291