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 assert(r->req.aiocb != NULL); 277 r->req.aiocb = NULL; 278 aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk)); 279 if (scsi_disk_req_check_error(r, ret, true)) { 280 goto done; 281 } 282 283 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct); 284 scsi_req_complete(&r->req, GOOD); 285 286 done: 287 aio_context_release(blk_get_aio_context(s->qdev.conf.blk)); 288 scsi_req_unref(&r->req); 289 } 290 291 static bool scsi_is_cmd_fua(SCSICommand *cmd) 292 { 293 switch (cmd->buf[0]) { 294 case READ_10: 295 case READ_12: 296 case READ_16: 297 case WRITE_10: 298 case WRITE_12: 299 case WRITE_16: 300 return (cmd->buf[1] & 8) != 0; 301 302 case VERIFY_10: 303 case VERIFY_12: 304 case VERIFY_16: 305 case WRITE_VERIFY_10: 306 case WRITE_VERIFY_12: 307 case WRITE_VERIFY_16: 308 return true; 309 310 case READ_6: 311 case WRITE_6: 312 default: 313 return false; 314 } 315 } 316 317 static void scsi_write_do_fua(SCSIDiskReq *r) 318 { 319 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 320 321 assert(r->req.aiocb == NULL); 322 assert(!r->req.io_canceled); 323 324 if (r->need_fua_emulation) { 325 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 0, 326 BLOCK_ACCT_FLUSH); 327 r->req.aiocb = blk_aio_flush(s->qdev.conf.blk, scsi_aio_complete, r); 328 return; 329 } 330 331 scsi_req_complete(&r->req, GOOD); 332 scsi_req_unref(&r->req); 333 } 334 335 static void scsi_dma_complete_noio(SCSIDiskReq *r, int ret) 336 { 337 assert(r->req.aiocb == NULL); 338 if (scsi_disk_req_check_error(r, ret, false)) { 339 goto done; 340 } 341 342 r->sector += r->sector_count; 343 r->sector_count = 0; 344 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) { 345 scsi_write_do_fua(r); 346 return; 347 } else { 348 scsi_req_complete(&r->req, GOOD); 349 } 350 351 done: 352 scsi_req_unref(&r->req); 353 } 354 355 static void scsi_dma_complete(void *opaque, int ret) 356 { 357 SCSIDiskReq *r = (SCSIDiskReq *)opaque; 358 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 359 360 assert(r->req.aiocb != NULL); 361 r->req.aiocb = NULL; 362 363 aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk)); 364 if (ret < 0) { 365 block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct); 366 } else { 367 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct); 368 } 369 scsi_dma_complete_noio(r, ret); 370 aio_context_release(blk_get_aio_context(s->qdev.conf.blk)); 371 } 372 373 static void scsi_read_complete_noio(SCSIDiskReq *r, int ret) 374 { 375 uint32_t n; 376 377 assert(r->req.aiocb == NULL); 378 if (scsi_disk_req_check_error(r, ret, false)) { 379 goto done; 380 } 381 382 n = r->qiov.size / BDRV_SECTOR_SIZE; 383 r->sector += n; 384 r->sector_count -= n; 385 scsi_req_data(&r->req, r->qiov.size); 386 387 done: 388 scsi_req_unref(&r->req); 389 } 390 391 static void scsi_read_complete(void *opaque, int ret) 392 { 393 SCSIDiskReq *r = (SCSIDiskReq *)opaque; 394 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 395 396 assert(r->req.aiocb != NULL); 397 r->req.aiocb = NULL; 398 399 aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk)); 400 if (ret < 0) { 401 block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct); 402 } else { 403 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct); 404 trace_scsi_disk_read_complete(r->req.tag, r->qiov.size); 405 } 406 scsi_read_complete_noio(r, ret); 407 aio_context_release(blk_get_aio_context(s->qdev.conf.blk)); 408 } 409 410 /* Actually issue a read to the block device. */ 411 static void scsi_do_read(SCSIDiskReq *r, int ret) 412 { 413 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 414 SCSIDiskClass *sdc = (SCSIDiskClass *) object_get_class(OBJECT(s)); 415 416 assert (r->req.aiocb == NULL); 417 if (scsi_disk_req_check_error(r, ret, false)) { 418 goto done; 419 } 420 421 /* The request is used as the AIO opaque value, so add a ref. */ 422 scsi_req_ref(&r->req); 423 424 if (r->req.sg) { 425 dma_acct_start(s->qdev.conf.blk, &r->acct, r->req.sg, BLOCK_ACCT_READ); 426 r->req.residual -= r->req.sg->size; 427 r->req.aiocb = dma_blk_io(blk_get_aio_context(s->qdev.conf.blk), 428 r->req.sg, r->sector << BDRV_SECTOR_BITS, 429 BDRV_SECTOR_SIZE, 430 sdc->dma_readv, r, scsi_dma_complete, r, 431 DMA_DIRECTION_FROM_DEVICE); 432 } else { 433 scsi_init_iovec(r, SCSI_DMA_BUF_SIZE); 434 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 435 r->qiov.size, BLOCK_ACCT_READ); 436 r->req.aiocb = sdc->dma_readv(r->sector << BDRV_SECTOR_BITS, &r->qiov, 437 scsi_read_complete, r, r); 438 } 439 440 done: 441 scsi_req_unref(&r->req); 442 } 443 444 static void scsi_do_read_cb(void *opaque, int ret) 445 { 446 SCSIDiskReq *r = (SCSIDiskReq *)opaque; 447 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 448 449 assert (r->req.aiocb != NULL); 450 r->req.aiocb = NULL; 451 452 aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk)); 453 if (ret < 0) { 454 block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct); 455 } else { 456 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct); 457 } 458 scsi_do_read(opaque, ret); 459 aio_context_release(blk_get_aio_context(s->qdev.conf.blk)); 460 } 461 462 /* Read more data from scsi device into buffer. */ 463 static void scsi_read_data(SCSIRequest *req) 464 { 465 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 466 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 467 bool first; 468 469 trace_scsi_disk_read_data_count(r->sector_count); 470 if (r->sector_count == 0) { 471 /* This also clears the sense buffer for REQUEST SENSE. */ 472 scsi_req_complete(&r->req, GOOD); 473 return; 474 } 475 476 /* No data transfer may already be in progress */ 477 assert(r->req.aiocb == NULL); 478 479 /* The request is used as the AIO opaque value, so add a ref. */ 480 scsi_req_ref(&r->req); 481 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) { 482 trace_scsi_disk_read_data_invalid(); 483 scsi_read_complete_noio(r, -EINVAL); 484 return; 485 } 486 487 if (!blk_is_available(req->dev->conf.blk)) { 488 scsi_read_complete_noio(r, -ENOMEDIUM); 489 return; 490 } 491 492 first = !r->started; 493 r->started = true; 494 if (first && r->need_fua_emulation) { 495 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 0, 496 BLOCK_ACCT_FLUSH); 497 r->req.aiocb = blk_aio_flush(s->qdev.conf.blk, scsi_do_read_cb, r); 498 } else { 499 scsi_do_read(r, 0); 500 } 501 } 502 503 static void scsi_write_complete_noio(SCSIDiskReq *r, int ret) 504 { 505 uint32_t n; 506 507 assert (r->req.aiocb == NULL); 508 if (scsi_disk_req_check_error(r, ret, false)) { 509 goto done; 510 } 511 512 n = r->qiov.size / BDRV_SECTOR_SIZE; 513 r->sector += n; 514 r->sector_count -= n; 515 if (r->sector_count == 0) { 516 scsi_write_do_fua(r); 517 return; 518 } else { 519 scsi_init_iovec(r, SCSI_DMA_BUF_SIZE); 520 trace_scsi_disk_write_complete_noio(r->req.tag, r->qiov.size); 521 scsi_req_data(&r->req, r->qiov.size); 522 } 523 524 done: 525 scsi_req_unref(&r->req); 526 } 527 528 static void scsi_write_complete(void * opaque, int ret) 529 { 530 SCSIDiskReq *r = (SCSIDiskReq *)opaque; 531 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 532 533 assert (r->req.aiocb != NULL); 534 r->req.aiocb = NULL; 535 536 aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk)); 537 if (ret < 0) { 538 block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct); 539 } else { 540 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct); 541 } 542 scsi_write_complete_noio(r, ret); 543 aio_context_release(blk_get_aio_context(s->qdev.conf.blk)); 544 } 545 546 static void scsi_write_data(SCSIRequest *req) 547 { 548 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 549 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 550 SCSIDiskClass *sdc = (SCSIDiskClass *) object_get_class(OBJECT(s)); 551 552 /* No data transfer may already be in progress */ 553 assert(r->req.aiocb == NULL); 554 555 /* The request is used as the AIO opaque value, so add a ref. */ 556 scsi_req_ref(&r->req); 557 if (r->req.cmd.mode != SCSI_XFER_TO_DEV) { 558 trace_scsi_disk_write_data_invalid(); 559 scsi_write_complete_noio(r, -EINVAL); 560 return; 561 } 562 563 if (!r->req.sg && !r->qiov.size) { 564 /* Called for the first time. Ask the driver to send us more data. */ 565 r->started = true; 566 scsi_write_complete_noio(r, 0); 567 return; 568 } 569 if (!blk_is_available(req->dev->conf.blk)) { 570 scsi_write_complete_noio(r, -ENOMEDIUM); 571 return; 572 } 573 574 if (r->req.cmd.buf[0] == VERIFY_10 || r->req.cmd.buf[0] == VERIFY_12 || 575 r->req.cmd.buf[0] == VERIFY_16) { 576 if (r->req.sg) { 577 scsi_dma_complete_noio(r, 0); 578 } else { 579 scsi_write_complete_noio(r, 0); 580 } 581 return; 582 } 583 584 if (r->req.sg) { 585 dma_acct_start(s->qdev.conf.blk, &r->acct, r->req.sg, BLOCK_ACCT_WRITE); 586 r->req.residual -= r->req.sg->size; 587 r->req.aiocb = dma_blk_io(blk_get_aio_context(s->qdev.conf.blk), 588 r->req.sg, r->sector << BDRV_SECTOR_BITS, 589 BDRV_SECTOR_SIZE, 590 sdc->dma_writev, r, scsi_dma_complete, r, 591 DMA_DIRECTION_TO_DEVICE); 592 } else { 593 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 594 r->qiov.size, BLOCK_ACCT_WRITE); 595 r->req.aiocb = sdc->dma_writev(r->sector << BDRV_SECTOR_BITS, &r->qiov, 596 scsi_write_complete, r, r); 597 } 598 } 599 600 /* Return a pointer to the data buffer. */ 601 static uint8_t *scsi_get_buf(SCSIRequest *req) 602 { 603 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 604 605 return (uint8_t *)r->iov.iov_base; 606 } 607 608 static int scsi_disk_emulate_vpd_page(SCSIRequest *req, uint8_t *outbuf) 609 { 610 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); 611 uint8_t page_code = req->cmd.buf[2]; 612 int start, buflen = 0; 613 614 outbuf[buflen++] = s->qdev.type & 0x1f; 615 outbuf[buflen++] = page_code; 616 outbuf[buflen++] = 0x00; 617 outbuf[buflen++] = 0x00; 618 start = buflen; 619 620 switch (page_code) { 621 case 0x00: /* Supported page codes, mandatory */ 622 { 623 trace_scsi_disk_emulate_vpd_page_00(req->cmd.xfer); 624 outbuf[buflen++] = 0x00; /* list of supported pages (this page) */ 625 if (s->serial) { 626 outbuf[buflen++] = 0x80; /* unit serial number */ 627 } 628 outbuf[buflen++] = 0x83; /* device identification */ 629 if (s->qdev.type == TYPE_DISK) { 630 outbuf[buflen++] = 0xb0; /* block limits */ 631 outbuf[buflen++] = 0xb1; /* block device characteristics */ 632 outbuf[buflen++] = 0xb2; /* thin provisioning */ 633 } 634 break; 635 } 636 case 0x80: /* Device serial number, optional */ 637 { 638 int l; 639 640 if (!s->serial) { 641 trace_scsi_disk_emulate_vpd_page_80_not_supported(); 642 return -1; 643 } 644 645 l = strlen(s->serial); 646 if (l > 36) { 647 l = 36; 648 } 649 650 trace_scsi_disk_emulate_vpd_page_80(req->cmd.xfer); 651 memcpy(outbuf + buflen, s->serial, l); 652 buflen += l; 653 break; 654 } 655 656 case 0x83: /* Device identification page, mandatory */ 657 { 658 int id_len = s->device_id ? MIN(strlen(s->device_id), 255 - 8) : 0; 659 660 trace_scsi_disk_emulate_vpd_page_83(req->cmd.xfer); 661 662 if (id_len) { 663 outbuf[buflen++] = 0x2; /* ASCII */ 664 outbuf[buflen++] = 0; /* not officially assigned */ 665 outbuf[buflen++] = 0; /* reserved */ 666 outbuf[buflen++] = id_len; /* length of data following */ 667 memcpy(outbuf + buflen, s->device_id, id_len); 668 buflen += id_len; 669 } 670 671 if (s->qdev.wwn) { 672 outbuf[buflen++] = 0x1; /* Binary */ 673 outbuf[buflen++] = 0x3; /* NAA */ 674 outbuf[buflen++] = 0; /* reserved */ 675 outbuf[buflen++] = 8; 676 stq_be_p(&outbuf[buflen], s->qdev.wwn); 677 buflen += 8; 678 } 679 680 if (s->qdev.port_wwn) { 681 outbuf[buflen++] = 0x61; /* SAS / Binary */ 682 outbuf[buflen++] = 0x93; /* PIV / Target port / NAA */ 683 outbuf[buflen++] = 0; /* reserved */ 684 outbuf[buflen++] = 8; 685 stq_be_p(&outbuf[buflen], s->qdev.port_wwn); 686 buflen += 8; 687 } 688 689 if (s->port_index) { 690 outbuf[buflen++] = 0x61; /* SAS / Binary */ 691 692 /* PIV/Target port/relative target port */ 693 outbuf[buflen++] = 0x94; 694 695 outbuf[buflen++] = 0; /* reserved */ 696 outbuf[buflen++] = 4; 697 stw_be_p(&outbuf[buflen + 2], s->port_index); 698 buflen += 4; 699 } 700 break; 701 } 702 case 0xb0: /* block limits */ 703 { 704 SCSIBlockLimits bl = {}; 705 706 if (s->qdev.type == TYPE_ROM) { 707 trace_scsi_disk_emulate_vpd_page_b0_not_supported(); 708 return -1; 709 } 710 bl.wsnz = 1; 711 bl.unmap_sectors = 712 s->qdev.conf.discard_granularity / s->qdev.blocksize; 713 bl.min_io_size = 714 s->qdev.conf.min_io_size / s->qdev.blocksize; 715 bl.opt_io_size = 716 s->qdev.conf.opt_io_size / s->qdev.blocksize; 717 bl.max_unmap_sectors = 718 s->max_unmap_size / s->qdev.blocksize; 719 bl.max_io_sectors = 720 s->max_io_size / s->qdev.blocksize; 721 /* 255 descriptors fit in 4 KiB with an 8-byte header */ 722 bl.max_unmap_descr = 255; 723 724 if (s->qdev.type == TYPE_DISK) { 725 int max_transfer_blk = blk_get_max_transfer(s->qdev.conf.blk); 726 int max_io_sectors_blk = 727 max_transfer_blk / s->qdev.blocksize; 728 729 bl.max_io_sectors = 730 MIN_NON_ZERO(max_io_sectors_blk, bl.max_io_sectors); 731 } 732 buflen += scsi_emulate_block_limits(outbuf + buflen, &bl); 733 break; 734 } 735 case 0xb1: /* block device characteristics */ 736 { 737 buflen = 0x40; 738 outbuf[4] = (s->rotation_rate >> 8) & 0xff; 739 outbuf[5] = s->rotation_rate & 0xff; 740 outbuf[6] = 0; /* PRODUCT TYPE */ 741 outbuf[7] = 0; /* WABEREQ | WACEREQ | NOMINAL FORM FACTOR */ 742 outbuf[8] = 0; /* VBULS */ 743 break; 744 } 745 case 0xb2: /* thin provisioning */ 746 { 747 buflen = 8; 748 outbuf[4] = 0; 749 outbuf[5] = 0xe0; /* unmap & write_same 10/16 all supported */ 750 outbuf[6] = s->qdev.conf.discard_granularity ? 2 : 1; 751 outbuf[7] = 0; 752 break; 753 } 754 default: 755 return -1; 756 } 757 /* done with EVPD */ 758 assert(buflen - start <= 255); 759 outbuf[start - 1] = buflen - start; 760 return buflen; 761 } 762 763 static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf) 764 { 765 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); 766 int buflen = 0; 767 768 if (req->cmd.buf[1] & 0x1) { 769 /* Vital product data */ 770 return scsi_disk_emulate_vpd_page(req, outbuf); 771 } 772 773 /* Standard INQUIRY data */ 774 if (req->cmd.buf[2] != 0) { 775 return -1; 776 } 777 778 /* PAGE CODE == 0 */ 779 buflen = req->cmd.xfer; 780 if (buflen > SCSI_MAX_INQUIRY_LEN) { 781 buflen = SCSI_MAX_INQUIRY_LEN; 782 } 783 784 outbuf[0] = s->qdev.type & 0x1f; 785 outbuf[1] = (s->features & (1 << SCSI_DISK_F_REMOVABLE)) ? 0x80 : 0; 786 787 strpadcpy((char *) &outbuf[16], 16, s->product, ' '); 788 strpadcpy((char *) &outbuf[8], 8, s->vendor, ' '); 789 790 memset(&outbuf[32], 0, 4); 791 memcpy(&outbuf[32], s->version, MIN(4, strlen(s->version))); 792 /* 793 * We claim conformance to SPC-3, which is required for guests 794 * to ask for modern features like READ CAPACITY(16) or the 795 * block characteristics VPD page by default. Not all of SPC-3 796 * is actually implemented, but we're good enough. 797 */ 798 outbuf[2] = s->qdev.default_scsi_version; 799 outbuf[3] = 2 | 0x10; /* Format 2, HiSup */ 800 801 if (buflen > 36) { 802 outbuf[4] = buflen - 5; /* Additional Length = (Len - 1) - 4 */ 803 } else { 804 /* If the allocation length of CDB is too small, 805 the additional length is not adjusted */ 806 outbuf[4] = 36 - 5; 807 } 808 809 /* Sync data transfer and TCQ. */ 810 outbuf[7] = 0x10 | (req->bus->info->tcq ? 0x02 : 0); 811 return buflen; 812 } 813 814 static inline bool media_is_dvd(SCSIDiskState *s) 815 { 816 uint64_t nb_sectors; 817 if (s->qdev.type != TYPE_ROM) { 818 return false; 819 } 820 if (!blk_is_available(s->qdev.conf.blk)) { 821 return false; 822 } 823 blk_get_geometry(s->qdev.conf.blk, &nb_sectors); 824 return nb_sectors > CD_MAX_SECTORS; 825 } 826 827 static inline bool media_is_cd(SCSIDiskState *s) 828 { 829 uint64_t nb_sectors; 830 if (s->qdev.type != TYPE_ROM) { 831 return false; 832 } 833 if (!blk_is_available(s->qdev.conf.blk)) { 834 return false; 835 } 836 blk_get_geometry(s->qdev.conf.blk, &nb_sectors); 837 return nb_sectors <= CD_MAX_SECTORS; 838 } 839 840 static int scsi_read_disc_information(SCSIDiskState *s, SCSIDiskReq *r, 841 uint8_t *outbuf) 842 { 843 uint8_t type = r->req.cmd.buf[1] & 7; 844 845 if (s->qdev.type != TYPE_ROM) { 846 return -1; 847 } 848 849 /* Types 1/2 are only defined for Blu-Ray. */ 850 if (type != 0) { 851 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); 852 return -1; 853 } 854 855 memset(outbuf, 0, 34); 856 outbuf[1] = 32; 857 outbuf[2] = 0xe; /* last session complete, disc finalized */ 858 outbuf[3] = 1; /* first track on disc */ 859 outbuf[4] = 1; /* # of sessions */ 860 outbuf[5] = 1; /* first track of last session */ 861 outbuf[6] = 1; /* last track of last session */ 862 outbuf[7] = 0x20; /* unrestricted use */ 863 outbuf[8] = 0x00; /* CD-ROM or DVD-ROM */ 864 /* 9-10-11: most significant byte corresponding bytes 4-5-6 */ 865 /* 12-23: not meaningful for CD-ROM or DVD-ROM */ 866 /* 24-31: disc bar code */ 867 /* 32: disc application code */ 868 /* 33: number of OPC tables */ 869 870 return 34; 871 } 872 873 static int scsi_read_dvd_structure(SCSIDiskState *s, SCSIDiskReq *r, 874 uint8_t *outbuf) 875 { 876 static const int rds_caps_size[5] = { 877 [0] = 2048 + 4, 878 [1] = 4 + 4, 879 [3] = 188 + 4, 880 [4] = 2048 + 4, 881 }; 882 883 uint8_t media = r->req.cmd.buf[1]; 884 uint8_t layer = r->req.cmd.buf[6]; 885 uint8_t format = r->req.cmd.buf[7]; 886 int size = -1; 887 888 if (s->qdev.type != TYPE_ROM) { 889 return -1; 890 } 891 if (media != 0) { 892 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); 893 return -1; 894 } 895 896 if (format != 0xff) { 897 if (!blk_is_available(s->qdev.conf.blk)) { 898 scsi_check_condition(r, SENSE_CODE(NO_MEDIUM)); 899 return -1; 900 } 901 if (media_is_cd(s)) { 902 scsi_check_condition(r, SENSE_CODE(INCOMPATIBLE_FORMAT)); 903 return -1; 904 } 905 if (format >= ARRAY_SIZE(rds_caps_size)) { 906 return -1; 907 } 908 size = rds_caps_size[format]; 909 memset(outbuf, 0, size); 910 } 911 912 switch (format) { 913 case 0x00: { 914 /* Physical format information */ 915 uint64_t nb_sectors; 916 if (layer != 0) { 917 goto fail; 918 } 919 blk_get_geometry(s->qdev.conf.blk, &nb_sectors); 920 921 outbuf[4] = 1; /* DVD-ROM, part version 1 */ 922 outbuf[5] = 0xf; /* 120mm disc, minimum rate unspecified */ 923 outbuf[6] = 1; /* one layer, read-only (per MMC-2 spec) */ 924 outbuf[7] = 0; /* default densities */ 925 926 stl_be_p(&outbuf[12], (nb_sectors >> 2) - 1); /* end sector */ 927 stl_be_p(&outbuf[16], (nb_sectors >> 2) - 1); /* l0 end sector */ 928 break; 929 } 930 931 case 0x01: /* DVD copyright information, all zeros */ 932 break; 933 934 case 0x03: /* BCA information - invalid field for no BCA info */ 935 return -1; 936 937 case 0x04: /* DVD disc manufacturing information, all zeros */ 938 break; 939 940 case 0xff: { /* List capabilities */ 941 int i; 942 size = 4; 943 for (i = 0; i < ARRAY_SIZE(rds_caps_size); i++) { 944 if (!rds_caps_size[i]) { 945 continue; 946 } 947 outbuf[size] = i; 948 outbuf[size + 1] = 0x40; /* Not writable, readable */ 949 stw_be_p(&outbuf[size + 2], rds_caps_size[i]); 950 size += 4; 951 } 952 break; 953 } 954 955 default: 956 return -1; 957 } 958 959 /* Size of buffer, not including 2 byte size field */ 960 stw_be_p(outbuf, size - 2); 961 return size; 962 963 fail: 964 return -1; 965 } 966 967 static int scsi_event_status_media(SCSIDiskState *s, uint8_t *outbuf) 968 { 969 uint8_t event_code, media_status; 970 971 media_status = 0; 972 if (s->tray_open) { 973 media_status = MS_TRAY_OPEN; 974 } else if (blk_is_inserted(s->qdev.conf.blk)) { 975 media_status = MS_MEDIA_PRESENT; 976 } 977 978 /* Event notification descriptor */ 979 event_code = MEC_NO_CHANGE; 980 if (media_status != MS_TRAY_OPEN) { 981 if (s->media_event) { 982 event_code = MEC_NEW_MEDIA; 983 s->media_event = false; 984 } else if (s->eject_request) { 985 event_code = MEC_EJECT_REQUESTED; 986 s->eject_request = false; 987 } 988 } 989 990 outbuf[0] = event_code; 991 outbuf[1] = media_status; 992 993 /* These fields are reserved, just clear them. */ 994 outbuf[2] = 0; 995 outbuf[3] = 0; 996 return 4; 997 } 998 999 static int scsi_get_event_status_notification(SCSIDiskState *s, SCSIDiskReq *r, 1000 uint8_t *outbuf) 1001 { 1002 int size; 1003 uint8_t *buf = r->req.cmd.buf; 1004 uint8_t notification_class_request = buf[4]; 1005 if (s->qdev.type != TYPE_ROM) { 1006 return -1; 1007 } 1008 if ((buf[1] & 1) == 0) { 1009 /* asynchronous */ 1010 return -1; 1011 } 1012 1013 size = 4; 1014 outbuf[0] = outbuf[1] = 0; 1015 outbuf[3] = 1 << GESN_MEDIA; /* supported events */ 1016 if (notification_class_request & (1 << GESN_MEDIA)) { 1017 outbuf[2] = GESN_MEDIA; 1018 size += scsi_event_status_media(s, &outbuf[size]); 1019 } else { 1020 outbuf[2] = 0x80; 1021 } 1022 stw_be_p(outbuf, size - 4); 1023 return size; 1024 } 1025 1026 static int scsi_get_configuration(SCSIDiskState *s, uint8_t *outbuf) 1027 { 1028 int current; 1029 1030 if (s->qdev.type != TYPE_ROM) { 1031 return -1; 1032 } 1033 1034 if (media_is_dvd(s)) { 1035 current = MMC_PROFILE_DVD_ROM; 1036 } else if (media_is_cd(s)) { 1037 current = MMC_PROFILE_CD_ROM; 1038 } else { 1039 current = MMC_PROFILE_NONE; 1040 } 1041 1042 memset(outbuf, 0, 40); 1043 stl_be_p(&outbuf[0], 36); /* Bytes after the data length field */ 1044 stw_be_p(&outbuf[6], current); 1045 /* outbuf[8] - outbuf[19]: Feature 0 - Profile list */ 1046 outbuf[10] = 0x03; /* persistent, current */ 1047 outbuf[11] = 8; /* two profiles */ 1048 stw_be_p(&outbuf[12], MMC_PROFILE_DVD_ROM); 1049 outbuf[14] = (current == MMC_PROFILE_DVD_ROM); 1050 stw_be_p(&outbuf[16], MMC_PROFILE_CD_ROM); 1051 outbuf[18] = (current == MMC_PROFILE_CD_ROM); 1052 /* outbuf[20] - outbuf[31]: Feature 1 - Core feature */ 1053 stw_be_p(&outbuf[20], 1); 1054 outbuf[22] = 0x08 | 0x03; /* version 2, persistent, current */ 1055 outbuf[23] = 8; 1056 stl_be_p(&outbuf[24], 1); /* SCSI */ 1057 outbuf[28] = 1; /* DBE = 1, mandatory */ 1058 /* outbuf[32] - outbuf[39]: Feature 3 - Removable media feature */ 1059 stw_be_p(&outbuf[32], 3); 1060 outbuf[34] = 0x08 | 0x03; /* version 2, persistent, current */ 1061 outbuf[35] = 4; 1062 outbuf[36] = 0x39; /* tray, load=1, eject=1, unlocked at powerup, lock=1 */ 1063 /* TODO: Random readable, CD read, DVD read, drive serial number, 1064 power management */ 1065 return 40; 1066 } 1067 1068 static int scsi_emulate_mechanism_status(SCSIDiskState *s, uint8_t *outbuf) 1069 { 1070 if (s->qdev.type != TYPE_ROM) { 1071 return -1; 1072 } 1073 memset(outbuf, 0, 8); 1074 outbuf[5] = 1; /* CD-ROM */ 1075 return 8; 1076 } 1077 1078 static int mode_sense_page(SCSIDiskState *s, int page, uint8_t **p_outbuf, 1079 int page_control) 1080 { 1081 static const int mode_sense_valid[0x3f] = { 1082 [MODE_PAGE_VENDOR_SPECIFIC] = (1 << TYPE_DISK) | (1 << TYPE_ROM), 1083 [MODE_PAGE_HD_GEOMETRY] = (1 << TYPE_DISK), 1084 [MODE_PAGE_FLEXIBLE_DISK_GEOMETRY] = (1 << TYPE_DISK), 1085 [MODE_PAGE_CACHING] = (1 << TYPE_DISK) | (1 << TYPE_ROM), 1086 [MODE_PAGE_R_W_ERROR] = (1 << TYPE_DISK) | (1 << TYPE_ROM), 1087 [MODE_PAGE_AUDIO_CTL] = (1 << TYPE_ROM), 1088 [MODE_PAGE_CAPABILITIES] = (1 << TYPE_ROM), 1089 [MODE_PAGE_APPLE_VENDOR] = (1 << TYPE_ROM), 1090 }; 1091 1092 uint8_t *p = *p_outbuf + 2; 1093 int length; 1094 1095 assert(page < ARRAY_SIZE(mode_sense_valid)); 1096 if ((mode_sense_valid[page] & (1 << s->qdev.type)) == 0) { 1097 return -1; 1098 } 1099 1100 /* 1101 * If Changeable Values are requested, a mask denoting those mode parameters 1102 * that are changeable shall be returned. As we currently don't support 1103 * parameter changes via MODE_SELECT all bits are returned set to zero. 1104 * The buffer was already menset to zero by the caller of this function. 1105 * 1106 * The offsets here are off by two compared to the descriptions in the 1107 * SCSI specs, because those include a 2-byte header. This is unfortunate, 1108 * but it is done so that offsets are consistent within our implementation 1109 * of MODE SENSE and MODE SELECT. MODE SELECT has to deal with both 1110 * 2-byte and 4-byte headers. 1111 */ 1112 switch (page) { 1113 case MODE_PAGE_HD_GEOMETRY: 1114 length = 0x16; 1115 if (page_control == 1) { /* Changeable Values */ 1116 break; 1117 } 1118 /* if a geometry hint is available, use it */ 1119 p[0] = (s->qdev.conf.cyls >> 16) & 0xff; 1120 p[1] = (s->qdev.conf.cyls >> 8) & 0xff; 1121 p[2] = s->qdev.conf.cyls & 0xff; 1122 p[3] = s->qdev.conf.heads & 0xff; 1123 /* Write precomp start cylinder, disabled */ 1124 p[4] = (s->qdev.conf.cyls >> 16) & 0xff; 1125 p[5] = (s->qdev.conf.cyls >> 8) & 0xff; 1126 p[6] = s->qdev.conf.cyls & 0xff; 1127 /* Reduced current start cylinder, disabled */ 1128 p[7] = (s->qdev.conf.cyls >> 16) & 0xff; 1129 p[8] = (s->qdev.conf.cyls >> 8) & 0xff; 1130 p[9] = s->qdev.conf.cyls & 0xff; 1131 /* Device step rate [ns], 200ns */ 1132 p[10] = 0; 1133 p[11] = 200; 1134 /* Landing zone cylinder */ 1135 p[12] = 0xff; 1136 p[13] = 0xff; 1137 p[14] = 0xff; 1138 /* Medium rotation rate [rpm], 5400 rpm */ 1139 p[18] = (5400 >> 8) & 0xff; 1140 p[19] = 5400 & 0xff; 1141 break; 1142 1143 case MODE_PAGE_FLEXIBLE_DISK_GEOMETRY: 1144 length = 0x1e; 1145 if (page_control == 1) { /* Changeable Values */ 1146 break; 1147 } 1148 /* Transfer rate [kbit/s], 5Mbit/s */ 1149 p[0] = 5000 >> 8; 1150 p[1] = 5000 & 0xff; 1151 /* if a geometry hint is available, use it */ 1152 p[2] = s->qdev.conf.heads & 0xff; 1153 p[3] = s->qdev.conf.secs & 0xff; 1154 p[4] = s->qdev.blocksize >> 8; 1155 p[6] = (s->qdev.conf.cyls >> 8) & 0xff; 1156 p[7] = s->qdev.conf.cyls & 0xff; 1157 /* Write precomp start cylinder, disabled */ 1158 p[8] = (s->qdev.conf.cyls >> 8) & 0xff; 1159 p[9] = s->qdev.conf.cyls & 0xff; 1160 /* Reduced current start cylinder, disabled */ 1161 p[10] = (s->qdev.conf.cyls >> 8) & 0xff; 1162 p[11] = s->qdev.conf.cyls & 0xff; 1163 /* Device step rate [100us], 100us */ 1164 p[12] = 0; 1165 p[13] = 1; 1166 /* Device step pulse width [us], 1us */ 1167 p[14] = 1; 1168 /* Device head settle delay [100us], 100us */ 1169 p[15] = 0; 1170 p[16] = 1; 1171 /* Motor on delay [0.1s], 0.1s */ 1172 p[17] = 1; 1173 /* Motor off delay [0.1s], 0.1s */ 1174 p[18] = 1; 1175 /* Medium rotation rate [rpm], 5400 rpm */ 1176 p[26] = (5400 >> 8) & 0xff; 1177 p[27] = 5400 & 0xff; 1178 break; 1179 1180 case MODE_PAGE_CACHING: 1181 length = 0x12; 1182 if (page_control == 1 || /* Changeable Values */ 1183 blk_enable_write_cache(s->qdev.conf.blk)) { 1184 p[0] = 4; /* WCE */ 1185 } 1186 break; 1187 1188 case MODE_PAGE_R_W_ERROR: 1189 length = 10; 1190 if (page_control == 1) { /* Changeable Values */ 1191 if (s->qdev.type == TYPE_ROM) { 1192 /* Automatic Write Reallocation Enabled */ 1193 p[0] = 0x80; 1194 } 1195 break; 1196 } 1197 p[0] = 0x80; /* Automatic Write Reallocation Enabled */ 1198 if (s->qdev.type == TYPE_ROM) { 1199 p[1] = 0x20; /* Read Retry Count */ 1200 } 1201 break; 1202 1203 case MODE_PAGE_AUDIO_CTL: 1204 length = 14; 1205 break; 1206 1207 case MODE_PAGE_CAPABILITIES: 1208 length = 0x14; 1209 if (page_control == 1) { /* Changeable Values */ 1210 break; 1211 } 1212 1213 p[0] = 0x3b; /* CD-R & CD-RW read */ 1214 p[1] = 0; /* Writing not supported */ 1215 p[2] = 0x7f; /* Audio, composite, digital out, 1216 mode 2 form 1&2, multi session */ 1217 p[3] = 0xff; /* CD DA, DA accurate, RW supported, 1218 RW corrected, C2 errors, ISRC, 1219 UPC, Bar code */ 1220 p[4] = 0x2d | (s->tray_locked ? 2 : 0); 1221 /* Locking supported, jumper present, eject, tray */ 1222 p[5] = 0; /* no volume & mute control, no 1223 changer */ 1224 p[6] = (50 * 176) >> 8; /* 50x read speed */ 1225 p[7] = (50 * 176) & 0xff; 1226 p[8] = 2 >> 8; /* Two volume levels */ 1227 p[9] = 2 & 0xff; 1228 p[10] = 2048 >> 8; /* 2M buffer */ 1229 p[11] = 2048 & 0xff; 1230 p[12] = (16 * 176) >> 8; /* 16x read speed current */ 1231 p[13] = (16 * 176) & 0xff; 1232 p[16] = (16 * 176) >> 8; /* 16x write speed */ 1233 p[17] = (16 * 176) & 0xff; 1234 p[18] = (16 * 176) >> 8; /* 16x write speed current */ 1235 p[19] = (16 * 176) & 0xff; 1236 break; 1237 1238 case MODE_PAGE_APPLE_VENDOR: 1239 if (s->quirks & (1 << SCSI_DISK_QUIRK_MODE_PAGE_APPLE_VENDOR)) { 1240 length = 0x1e; 1241 if (page_control == 1) { /* Changeable Values */ 1242 break; 1243 } 1244 1245 memset(p, 0, length); 1246 strcpy((char *)p + 8, "APPLE COMPUTER, INC "); 1247 break; 1248 } else { 1249 return -1; 1250 } 1251 1252 case MODE_PAGE_VENDOR_SPECIFIC: 1253 if (s->qdev.type == TYPE_DISK && (s->quirks & 1254 (1 << SCSI_DISK_QUIRK_MODE_PAGE_VENDOR_SPECIFIC_APPLE))) { 1255 length = 0x2; 1256 if (page_control == 1) { /* Changeable Values */ 1257 p[0] = 0xff; 1258 p[1] = 0xff; 1259 break; 1260 } 1261 p[0] = 0; 1262 p[1] = 0; 1263 break; 1264 } else { 1265 return -1; 1266 } 1267 1268 default: 1269 return -1; 1270 } 1271 1272 assert(length < 256); 1273 (*p_outbuf)[0] = page; 1274 (*p_outbuf)[1] = length; 1275 *p_outbuf += length + 2; 1276 return length + 2; 1277 } 1278 1279 static int scsi_disk_emulate_mode_sense(SCSIDiskReq *r, uint8_t *outbuf) 1280 { 1281 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 1282 uint64_t nb_sectors; 1283 bool dbd; 1284 int page, buflen, ret, page_control; 1285 uint8_t *p; 1286 uint8_t dev_specific_param; 1287 1288 dbd = (r->req.cmd.buf[1] & 0x8) != 0; 1289 page = r->req.cmd.buf[2] & 0x3f; 1290 page_control = (r->req.cmd.buf[2] & 0xc0) >> 6; 1291 1292 trace_scsi_disk_emulate_mode_sense((r->req.cmd.buf[0] == MODE_SENSE) ? 6 : 1293 10, page, r->req.cmd.xfer, page_control); 1294 memset(outbuf, 0, r->req.cmd.xfer); 1295 p = outbuf; 1296 1297 if (s->qdev.type == TYPE_DISK) { 1298 dev_specific_param = s->features & (1 << SCSI_DISK_F_DPOFUA) ? 0x10 : 0; 1299 if (!blk_is_writable(s->qdev.conf.blk)) { 1300 dev_specific_param |= 0x80; /* Readonly. */ 1301 } 1302 } else { 1303 if (s->quirks & (1 << SCSI_DISK_QUIRK_MODE_SENSE_ROM_USE_DBD)) { 1304 /* Use DBD from the request... */ 1305 dev_specific_param = 0x00; 1306 1307 /* 1308 * ... unless we receive a request for MODE_PAGE_APPLE_VENDOR 1309 * which should never return a block descriptor even though DBD is 1310 * not set, otherwise CDROM detection fails in MacOS 1311 */ 1312 if (s->quirks & (1 << SCSI_DISK_QUIRK_MODE_PAGE_APPLE_VENDOR) && 1313 page == MODE_PAGE_APPLE_VENDOR) { 1314 dbd = true; 1315 } 1316 } else { 1317 /* 1318 * MMC prescribes that CD/DVD drives have no block descriptors, 1319 * and defines no device-specific parameter. 1320 */ 1321 dev_specific_param = 0x00; 1322 dbd = true; 1323 } 1324 } 1325 1326 if (r->req.cmd.buf[0] == MODE_SENSE) { 1327 p[1] = 0; /* Default media type. */ 1328 p[2] = dev_specific_param; 1329 p[3] = 0; /* Block descriptor length. */ 1330 p += 4; 1331 } else { /* MODE_SENSE_10 */ 1332 p[2] = 0; /* Default media type. */ 1333 p[3] = dev_specific_param; 1334 p[6] = p[7] = 0; /* Block descriptor length. */ 1335 p += 8; 1336 } 1337 1338 blk_get_geometry(s->qdev.conf.blk, &nb_sectors); 1339 if (!dbd && nb_sectors) { 1340 if (r->req.cmd.buf[0] == MODE_SENSE) { 1341 outbuf[3] = 8; /* Block descriptor length */ 1342 } else { /* MODE_SENSE_10 */ 1343 outbuf[7] = 8; /* Block descriptor length */ 1344 } 1345 nb_sectors /= (s->qdev.blocksize / BDRV_SECTOR_SIZE); 1346 if (nb_sectors > 0xffffff) { 1347 nb_sectors = 0; 1348 } 1349 p[0] = 0; /* media density code */ 1350 p[1] = (nb_sectors >> 16) & 0xff; 1351 p[2] = (nb_sectors >> 8) & 0xff; 1352 p[3] = nb_sectors & 0xff; 1353 p[4] = 0; /* reserved */ 1354 p[5] = 0; /* bytes 5-7 are the sector size in bytes */ 1355 p[6] = s->qdev.blocksize >> 8; 1356 p[7] = 0; 1357 p += 8; 1358 } 1359 1360 if (page_control == 3) { 1361 /* Saved Values */ 1362 scsi_check_condition(r, SENSE_CODE(SAVING_PARAMS_NOT_SUPPORTED)); 1363 return -1; 1364 } 1365 1366 if (page == 0x3f) { 1367 for (page = 0; page <= 0x3e; page++) { 1368 mode_sense_page(s, page, &p, page_control); 1369 } 1370 } else { 1371 ret = mode_sense_page(s, page, &p, page_control); 1372 if (ret == -1) { 1373 return -1; 1374 } 1375 } 1376 1377 buflen = p - outbuf; 1378 /* 1379 * The mode data length field specifies the length in bytes of the 1380 * following data that is available to be transferred. The mode data 1381 * length does not include itself. 1382 */ 1383 if (r->req.cmd.buf[0] == MODE_SENSE) { 1384 outbuf[0] = buflen - 1; 1385 } else { /* MODE_SENSE_10 */ 1386 outbuf[0] = ((buflen - 2) >> 8) & 0xff; 1387 outbuf[1] = (buflen - 2) & 0xff; 1388 } 1389 return buflen; 1390 } 1391 1392 static int scsi_disk_emulate_read_toc(SCSIRequest *req, uint8_t *outbuf) 1393 { 1394 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); 1395 int start_track, format, msf, toclen; 1396 uint64_t nb_sectors; 1397 1398 msf = req->cmd.buf[1] & 2; 1399 format = req->cmd.buf[2] & 0xf; 1400 start_track = req->cmd.buf[6]; 1401 blk_get_geometry(s->qdev.conf.blk, &nb_sectors); 1402 trace_scsi_disk_emulate_read_toc(start_track, format, msf >> 1); 1403 nb_sectors /= s->qdev.blocksize / BDRV_SECTOR_SIZE; 1404 switch (format) { 1405 case 0: 1406 toclen = cdrom_read_toc(nb_sectors, outbuf, msf, start_track); 1407 break; 1408 case 1: 1409 /* multi session : only a single session defined */ 1410 toclen = 12; 1411 memset(outbuf, 0, 12); 1412 outbuf[1] = 0x0a; 1413 outbuf[2] = 0x01; 1414 outbuf[3] = 0x01; 1415 break; 1416 case 2: 1417 toclen = cdrom_read_toc_raw(nb_sectors, outbuf, msf, start_track); 1418 break; 1419 default: 1420 return -1; 1421 } 1422 return toclen; 1423 } 1424 1425 static int scsi_disk_emulate_start_stop(SCSIDiskReq *r) 1426 { 1427 SCSIRequest *req = &r->req; 1428 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); 1429 bool start = req->cmd.buf[4] & 1; 1430 bool loej = req->cmd.buf[4] & 2; /* load on start, eject on !start */ 1431 int pwrcnd = req->cmd.buf[4] & 0xf0; 1432 1433 if (pwrcnd) { 1434 /* eject/load only happens for power condition == 0 */ 1435 return 0; 1436 } 1437 1438 if ((s->features & (1 << SCSI_DISK_F_REMOVABLE)) && loej) { 1439 if (!start && !s->tray_open && s->tray_locked) { 1440 scsi_check_condition(r, 1441 blk_is_inserted(s->qdev.conf.blk) 1442 ? SENSE_CODE(ILLEGAL_REQ_REMOVAL_PREVENTED) 1443 : SENSE_CODE(NOT_READY_REMOVAL_PREVENTED)); 1444 return -1; 1445 } 1446 1447 if (s->tray_open != !start) { 1448 blk_eject(s->qdev.conf.blk, !start); 1449 s->tray_open = !start; 1450 } 1451 } 1452 return 0; 1453 } 1454 1455 static void scsi_disk_emulate_read_data(SCSIRequest *req) 1456 { 1457 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 1458 int buflen = r->iov.iov_len; 1459 1460 if (buflen) { 1461 trace_scsi_disk_emulate_read_data(buflen); 1462 r->iov.iov_len = 0; 1463 r->started = true; 1464 scsi_req_data(&r->req, buflen); 1465 return; 1466 } 1467 1468 /* This also clears the sense buffer for REQUEST SENSE. */ 1469 scsi_req_complete(&r->req, GOOD); 1470 } 1471 1472 static int scsi_disk_check_mode_select(SCSIDiskState *s, int page, 1473 uint8_t *inbuf, int inlen) 1474 { 1475 uint8_t mode_current[SCSI_MAX_MODE_LEN]; 1476 uint8_t mode_changeable[SCSI_MAX_MODE_LEN]; 1477 uint8_t *p; 1478 int len, expected_len, changeable_len, i; 1479 1480 /* The input buffer does not include the page header, so it is 1481 * off by 2 bytes. 1482 */ 1483 expected_len = inlen + 2; 1484 if (expected_len > SCSI_MAX_MODE_LEN) { 1485 return -1; 1486 } 1487 1488 /* MODE_PAGE_ALLS is only valid for MODE SENSE commands */ 1489 if (page == MODE_PAGE_ALLS) { 1490 return -1; 1491 } 1492 1493 p = mode_current; 1494 memset(mode_current, 0, inlen + 2); 1495 len = mode_sense_page(s, page, &p, 0); 1496 if (len < 0 || len != expected_len) { 1497 return -1; 1498 } 1499 1500 p = mode_changeable; 1501 memset(mode_changeable, 0, inlen + 2); 1502 changeable_len = mode_sense_page(s, page, &p, 1); 1503 assert(changeable_len == len); 1504 1505 /* Check that unchangeable bits are the same as what MODE SENSE 1506 * would return. 1507 */ 1508 for (i = 2; i < len; i++) { 1509 if (((mode_current[i] ^ inbuf[i - 2]) & ~mode_changeable[i]) != 0) { 1510 return -1; 1511 } 1512 } 1513 return 0; 1514 } 1515 1516 static void scsi_disk_apply_mode_select(SCSIDiskState *s, int page, uint8_t *p) 1517 { 1518 switch (page) { 1519 case MODE_PAGE_CACHING: 1520 blk_set_enable_write_cache(s->qdev.conf.blk, (p[0] & 4) != 0); 1521 break; 1522 1523 default: 1524 break; 1525 } 1526 } 1527 1528 static int mode_select_pages(SCSIDiskReq *r, uint8_t *p, int len, bool change) 1529 { 1530 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 1531 1532 while (len > 0) { 1533 int page, subpage, page_len; 1534 1535 /* Parse both possible formats for the mode page headers. */ 1536 page = p[0] & 0x3f; 1537 if (p[0] & 0x40) { 1538 if (len < 4) { 1539 goto invalid_param_len; 1540 } 1541 subpage = p[1]; 1542 page_len = lduw_be_p(&p[2]); 1543 p += 4; 1544 len -= 4; 1545 } else { 1546 if (len < 2) { 1547 goto invalid_param_len; 1548 } 1549 subpage = 0; 1550 page_len = p[1]; 1551 p += 2; 1552 len -= 2; 1553 } 1554 1555 if (subpage) { 1556 goto invalid_param; 1557 } 1558 if (page_len > len) { 1559 if (!(s->quirks & SCSI_DISK_QUIRK_MODE_PAGE_TRUNCATED)) { 1560 goto invalid_param_len; 1561 } 1562 trace_scsi_disk_mode_select_page_truncated(page, page_len, len); 1563 } 1564 1565 if (!change) { 1566 if (scsi_disk_check_mode_select(s, page, p, page_len) < 0) { 1567 goto invalid_param; 1568 } 1569 } else { 1570 scsi_disk_apply_mode_select(s, page, p); 1571 } 1572 1573 p += page_len; 1574 len -= page_len; 1575 } 1576 return 0; 1577 1578 invalid_param: 1579 scsi_check_condition(r, SENSE_CODE(INVALID_PARAM)); 1580 return -1; 1581 1582 invalid_param_len: 1583 scsi_check_condition(r, SENSE_CODE(INVALID_PARAM_LEN)); 1584 return -1; 1585 } 1586 1587 static void scsi_disk_emulate_mode_select(SCSIDiskReq *r, uint8_t *inbuf) 1588 { 1589 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 1590 uint8_t *p = inbuf; 1591 int cmd = r->req.cmd.buf[0]; 1592 int len = r->req.cmd.xfer; 1593 int hdr_len = (cmd == MODE_SELECT ? 4 : 8); 1594 int bd_len, bs; 1595 int pass; 1596 1597 if ((r->req.cmd.buf[1] & 0x11) != 0x10) { 1598 if (!(s->quirks & 1599 (1 << SCSI_DISK_QUIRK_MODE_PAGE_VENDOR_SPECIFIC_APPLE))) { 1600 /* We only support PF=1, SP=0. */ 1601 goto invalid_field; 1602 } 1603 } 1604 1605 if (len < hdr_len) { 1606 goto invalid_param_len; 1607 } 1608 1609 bd_len = (cmd == MODE_SELECT ? p[3] : lduw_be_p(&p[6])); 1610 len -= hdr_len; 1611 p += hdr_len; 1612 if (len < bd_len) { 1613 goto invalid_param_len; 1614 } 1615 if (bd_len != 0 && bd_len != 8) { 1616 goto invalid_param; 1617 } 1618 1619 /* Allow changing the block size */ 1620 if (bd_len) { 1621 bs = p[5] << 16 | p[6] << 8 | p[7]; 1622 1623 /* 1624 * Since the existing code only checks/updates bits 8-15 of the block 1625 * size, restrict ourselves to the same requirement for now to ensure 1626 * that a block size set by a block descriptor and then read back by 1627 * a subsequent SCSI command will be the same 1628 */ 1629 if (bs && !(bs & ~0xff00) && bs != s->qdev.blocksize) { 1630 s->qdev.blocksize = bs; 1631 trace_scsi_disk_mode_select_set_blocksize(s->qdev.blocksize); 1632 } 1633 } 1634 1635 len -= bd_len; 1636 p += bd_len; 1637 1638 /* Ensure no change is made if there is an error! */ 1639 for (pass = 0; pass < 2; pass++) { 1640 if (mode_select_pages(r, p, len, pass == 1) < 0) { 1641 assert(pass == 0); 1642 return; 1643 } 1644 } 1645 if (!blk_enable_write_cache(s->qdev.conf.blk)) { 1646 /* The request is used as the AIO opaque value, so add a ref. */ 1647 scsi_req_ref(&r->req); 1648 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 0, 1649 BLOCK_ACCT_FLUSH); 1650 r->req.aiocb = blk_aio_flush(s->qdev.conf.blk, scsi_aio_complete, r); 1651 return; 1652 } 1653 1654 scsi_req_complete(&r->req, GOOD); 1655 return; 1656 1657 invalid_param: 1658 scsi_check_condition(r, SENSE_CODE(INVALID_PARAM)); 1659 return; 1660 1661 invalid_param_len: 1662 scsi_check_condition(r, SENSE_CODE(INVALID_PARAM_LEN)); 1663 return; 1664 1665 invalid_field: 1666 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); 1667 } 1668 1669 /* sector_num and nb_sectors expected to be in qdev blocksize */ 1670 static inline bool check_lba_range(SCSIDiskState *s, 1671 uint64_t sector_num, uint32_t nb_sectors) 1672 { 1673 /* 1674 * The first line tests that no overflow happens when computing the last 1675 * sector. The second line tests that the last accessed sector is in 1676 * range. 1677 * 1678 * Careful, the computations should not underflow for nb_sectors == 0, 1679 * and a 0-block read to the first LBA beyond the end of device is 1680 * valid. 1681 */ 1682 return (sector_num <= sector_num + nb_sectors && 1683 sector_num + nb_sectors <= s->qdev.max_lba + 1); 1684 } 1685 1686 typedef struct UnmapCBData { 1687 SCSIDiskReq *r; 1688 uint8_t *inbuf; 1689 int count; 1690 } UnmapCBData; 1691 1692 static void scsi_unmap_complete(void *opaque, int ret); 1693 1694 static void scsi_unmap_complete_noio(UnmapCBData *data, int ret) 1695 { 1696 SCSIDiskReq *r = data->r; 1697 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 1698 1699 assert(r->req.aiocb == NULL); 1700 1701 if (data->count > 0) { 1702 uint64_t sector_num = ldq_be_p(&data->inbuf[0]); 1703 uint32_t nb_sectors = ldl_be_p(&data->inbuf[8]) & 0xffffffffULL; 1704 r->sector = sector_num * (s->qdev.blocksize / BDRV_SECTOR_SIZE); 1705 r->sector_count = nb_sectors * (s->qdev.blocksize / BDRV_SECTOR_SIZE); 1706 1707 if (!check_lba_range(s, sector_num, nb_sectors)) { 1708 block_acct_invalid(blk_get_stats(s->qdev.conf.blk), 1709 BLOCK_ACCT_UNMAP); 1710 scsi_check_condition(r, SENSE_CODE(LBA_OUT_OF_RANGE)); 1711 goto done; 1712 } 1713 1714 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 1715 r->sector_count * BDRV_SECTOR_SIZE, 1716 BLOCK_ACCT_UNMAP); 1717 1718 r->req.aiocb = blk_aio_pdiscard(s->qdev.conf.blk, 1719 r->sector * BDRV_SECTOR_SIZE, 1720 r->sector_count * BDRV_SECTOR_SIZE, 1721 scsi_unmap_complete, data); 1722 data->count--; 1723 data->inbuf += 16; 1724 return; 1725 } 1726 1727 scsi_req_complete(&r->req, GOOD); 1728 1729 done: 1730 scsi_req_unref(&r->req); 1731 g_free(data); 1732 } 1733 1734 static void scsi_unmap_complete(void *opaque, int ret) 1735 { 1736 UnmapCBData *data = opaque; 1737 SCSIDiskReq *r = data->r; 1738 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 1739 1740 assert(r->req.aiocb != NULL); 1741 r->req.aiocb = NULL; 1742 1743 aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk)); 1744 if (scsi_disk_req_check_error(r, ret, true)) { 1745 scsi_req_unref(&r->req); 1746 g_free(data); 1747 } else { 1748 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct); 1749 scsi_unmap_complete_noio(data, ret); 1750 } 1751 aio_context_release(blk_get_aio_context(s->qdev.conf.blk)); 1752 } 1753 1754 static void scsi_disk_emulate_unmap(SCSIDiskReq *r, uint8_t *inbuf) 1755 { 1756 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 1757 uint8_t *p = inbuf; 1758 int len = r->req.cmd.xfer; 1759 UnmapCBData *data; 1760 1761 /* Reject ANCHOR=1. */ 1762 if (r->req.cmd.buf[1] & 0x1) { 1763 goto invalid_field; 1764 } 1765 1766 if (len < 8) { 1767 goto invalid_param_len; 1768 } 1769 if (len < lduw_be_p(&p[0]) + 2) { 1770 goto invalid_param_len; 1771 } 1772 if (len < lduw_be_p(&p[2]) + 8) { 1773 goto invalid_param_len; 1774 } 1775 if (lduw_be_p(&p[2]) & 15) { 1776 goto invalid_param_len; 1777 } 1778 1779 if (!blk_is_writable(s->qdev.conf.blk)) { 1780 block_acct_invalid(blk_get_stats(s->qdev.conf.blk), BLOCK_ACCT_UNMAP); 1781 scsi_check_condition(r, SENSE_CODE(WRITE_PROTECTED)); 1782 return; 1783 } 1784 1785 data = g_new0(UnmapCBData, 1); 1786 data->r = r; 1787 data->inbuf = &p[8]; 1788 data->count = lduw_be_p(&p[2]) >> 4; 1789 1790 /* The matching unref is in scsi_unmap_complete, before data is freed. */ 1791 scsi_req_ref(&r->req); 1792 scsi_unmap_complete_noio(data, 0); 1793 return; 1794 1795 invalid_param_len: 1796 block_acct_invalid(blk_get_stats(s->qdev.conf.blk), BLOCK_ACCT_UNMAP); 1797 scsi_check_condition(r, SENSE_CODE(INVALID_PARAM_LEN)); 1798 return; 1799 1800 invalid_field: 1801 block_acct_invalid(blk_get_stats(s->qdev.conf.blk), BLOCK_ACCT_UNMAP); 1802 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); 1803 } 1804 1805 typedef struct WriteSameCBData { 1806 SCSIDiskReq *r; 1807 int64_t sector; 1808 int nb_sectors; 1809 QEMUIOVector qiov; 1810 struct iovec iov; 1811 } WriteSameCBData; 1812 1813 static void scsi_write_same_complete(void *opaque, int ret) 1814 { 1815 WriteSameCBData *data = opaque; 1816 SCSIDiskReq *r = data->r; 1817 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 1818 1819 assert(r->req.aiocb != NULL); 1820 r->req.aiocb = NULL; 1821 aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk)); 1822 if (scsi_disk_req_check_error(r, ret, true)) { 1823 goto done; 1824 } 1825 1826 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct); 1827 1828 data->nb_sectors -= data->iov.iov_len / BDRV_SECTOR_SIZE; 1829 data->sector += data->iov.iov_len / BDRV_SECTOR_SIZE; 1830 data->iov.iov_len = MIN(data->nb_sectors * BDRV_SECTOR_SIZE, 1831 data->iov.iov_len); 1832 if (data->iov.iov_len) { 1833 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 1834 data->iov.iov_len, BLOCK_ACCT_WRITE); 1835 /* Reinitialize qiov, to handle unaligned WRITE SAME request 1836 * where final qiov may need smaller size */ 1837 qemu_iovec_init_external(&data->qiov, &data->iov, 1); 1838 r->req.aiocb = blk_aio_pwritev(s->qdev.conf.blk, 1839 data->sector << BDRV_SECTOR_BITS, 1840 &data->qiov, 0, 1841 scsi_write_same_complete, data); 1842 aio_context_release(blk_get_aio_context(s->qdev.conf.blk)); 1843 return; 1844 } 1845 1846 scsi_req_complete(&r->req, GOOD); 1847 1848 done: 1849 scsi_req_unref(&r->req); 1850 qemu_vfree(data->iov.iov_base); 1851 g_free(data); 1852 aio_context_release(blk_get_aio_context(s->qdev.conf.blk)); 1853 } 1854 1855 static void scsi_disk_emulate_write_same(SCSIDiskReq *r, uint8_t *inbuf) 1856 { 1857 SCSIRequest *req = &r->req; 1858 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); 1859 uint32_t nb_sectors = scsi_data_cdb_xfer(r->req.cmd.buf); 1860 WriteSameCBData *data; 1861 uint8_t *buf; 1862 int i, l; 1863 1864 /* Fail if PBDATA=1 or LBDATA=1 or ANCHOR=1. */ 1865 if (nb_sectors == 0 || (req->cmd.buf[1] & 0x16)) { 1866 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); 1867 return; 1868 } 1869 1870 if (!blk_is_writable(s->qdev.conf.blk)) { 1871 scsi_check_condition(r, SENSE_CODE(WRITE_PROTECTED)); 1872 return; 1873 } 1874 if (!check_lba_range(s, r->req.cmd.lba, nb_sectors)) { 1875 scsi_check_condition(r, SENSE_CODE(LBA_OUT_OF_RANGE)); 1876 return; 1877 } 1878 1879 if ((req->cmd.buf[1] & 0x1) || buffer_is_zero(inbuf, s->qdev.blocksize)) { 1880 int flags = (req->cmd.buf[1] & 0x8) ? BDRV_REQ_MAY_UNMAP : 0; 1881 1882 /* The request is used as the AIO opaque value, so add a ref. */ 1883 scsi_req_ref(&r->req); 1884 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 1885 nb_sectors * s->qdev.blocksize, 1886 BLOCK_ACCT_WRITE); 1887 r->req.aiocb = blk_aio_pwrite_zeroes(s->qdev.conf.blk, 1888 r->req.cmd.lba * s->qdev.blocksize, 1889 nb_sectors * s->qdev.blocksize, 1890 flags, scsi_aio_complete, r); 1891 return; 1892 } 1893 1894 data = g_new0(WriteSameCBData, 1); 1895 data->r = r; 1896 data->sector = r->req.cmd.lba * (s->qdev.blocksize / BDRV_SECTOR_SIZE); 1897 data->nb_sectors = nb_sectors * (s->qdev.blocksize / BDRV_SECTOR_SIZE); 1898 data->iov.iov_len = MIN(data->nb_sectors * BDRV_SECTOR_SIZE, 1899 SCSI_WRITE_SAME_MAX); 1900 data->iov.iov_base = buf = blk_blockalign(s->qdev.conf.blk, 1901 data->iov.iov_len); 1902 qemu_iovec_init_external(&data->qiov, &data->iov, 1); 1903 1904 for (i = 0; i < data->iov.iov_len; i += l) { 1905 l = MIN(s->qdev.blocksize, data->iov.iov_len - i); 1906 memcpy(&buf[i], inbuf, l); 1907 } 1908 1909 scsi_req_ref(&r->req); 1910 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 1911 data->iov.iov_len, BLOCK_ACCT_WRITE); 1912 r->req.aiocb = blk_aio_pwritev(s->qdev.conf.blk, 1913 data->sector << BDRV_SECTOR_BITS, 1914 &data->qiov, 0, 1915 scsi_write_same_complete, data); 1916 } 1917 1918 static void scsi_disk_emulate_write_data(SCSIRequest *req) 1919 { 1920 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 1921 1922 if (r->iov.iov_len) { 1923 int buflen = r->iov.iov_len; 1924 trace_scsi_disk_emulate_write_data(buflen); 1925 r->iov.iov_len = 0; 1926 scsi_req_data(&r->req, buflen); 1927 return; 1928 } 1929 1930 switch (req->cmd.buf[0]) { 1931 case MODE_SELECT: 1932 case MODE_SELECT_10: 1933 /* This also clears the sense buffer for REQUEST SENSE. */ 1934 scsi_disk_emulate_mode_select(r, r->iov.iov_base); 1935 break; 1936 1937 case UNMAP: 1938 scsi_disk_emulate_unmap(r, r->iov.iov_base); 1939 break; 1940 1941 case VERIFY_10: 1942 case VERIFY_12: 1943 case VERIFY_16: 1944 if (r->req.status == -1) { 1945 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); 1946 } 1947 break; 1948 1949 case WRITE_SAME_10: 1950 case WRITE_SAME_16: 1951 scsi_disk_emulate_write_same(r, r->iov.iov_base); 1952 break; 1953 1954 default: 1955 abort(); 1956 } 1957 } 1958 1959 static int32_t scsi_disk_emulate_command(SCSIRequest *req, uint8_t *buf) 1960 { 1961 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 1962 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); 1963 uint64_t nb_sectors; 1964 uint8_t *outbuf; 1965 int buflen; 1966 1967 switch (req->cmd.buf[0]) { 1968 case INQUIRY: 1969 case MODE_SENSE: 1970 case MODE_SENSE_10: 1971 case RESERVE: 1972 case RESERVE_10: 1973 case RELEASE: 1974 case RELEASE_10: 1975 case START_STOP: 1976 case ALLOW_MEDIUM_REMOVAL: 1977 case GET_CONFIGURATION: 1978 case GET_EVENT_STATUS_NOTIFICATION: 1979 case MECHANISM_STATUS: 1980 case REQUEST_SENSE: 1981 break; 1982 1983 default: 1984 if (!blk_is_available(s->qdev.conf.blk)) { 1985 scsi_check_condition(r, SENSE_CODE(NO_MEDIUM)); 1986 return 0; 1987 } 1988 break; 1989 } 1990 1991 /* 1992 * FIXME: we shouldn't return anything bigger than 4k, but the code 1993 * requires the buffer to be as big as req->cmd.xfer in several 1994 * places. So, do not allow CDBs with a very large ALLOCATION 1995 * LENGTH. The real fix would be to modify scsi_read_data and 1996 * dma_buf_read, so that they return data beyond the buflen 1997 * as all zeros. 1998 */ 1999 if (req->cmd.xfer > 65536) { 2000 goto illegal_request; 2001 } 2002 r->buflen = MAX(4096, req->cmd.xfer); 2003 2004 if (!r->iov.iov_base) { 2005 r->iov.iov_base = blk_blockalign(s->qdev.conf.blk, r->buflen); 2006 } 2007 2008 outbuf = r->iov.iov_base; 2009 memset(outbuf, 0, r->buflen); 2010 switch (req->cmd.buf[0]) { 2011 case TEST_UNIT_READY: 2012 assert(blk_is_available(s->qdev.conf.blk)); 2013 break; 2014 case INQUIRY: 2015 buflen = scsi_disk_emulate_inquiry(req, outbuf); 2016 if (buflen < 0) { 2017 goto illegal_request; 2018 } 2019 break; 2020 case MODE_SENSE: 2021 case MODE_SENSE_10: 2022 buflen = scsi_disk_emulate_mode_sense(r, outbuf); 2023 if (buflen < 0) { 2024 goto illegal_request; 2025 } 2026 break; 2027 case READ_TOC: 2028 buflen = scsi_disk_emulate_read_toc(req, outbuf); 2029 if (buflen < 0) { 2030 goto illegal_request; 2031 } 2032 break; 2033 case RESERVE: 2034 if (req->cmd.buf[1] & 1) { 2035 goto illegal_request; 2036 } 2037 break; 2038 case RESERVE_10: 2039 if (req->cmd.buf[1] & 3) { 2040 goto illegal_request; 2041 } 2042 break; 2043 case RELEASE: 2044 if (req->cmd.buf[1] & 1) { 2045 goto illegal_request; 2046 } 2047 break; 2048 case RELEASE_10: 2049 if (req->cmd.buf[1] & 3) { 2050 goto illegal_request; 2051 } 2052 break; 2053 case START_STOP: 2054 if (scsi_disk_emulate_start_stop(r) < 0) { 2055 return 0; 2056 } 2057 break; 2058 case ALLOW_MEDIUM_REMOVAL: 2059 s->tray_locked = req->cmd.buf[4] & 1; 2060 blk_lock_medium(s->qdev.conf.blk, req->cmd.buf[4] & 1); 2061 break; 2062 case READ_CAPACITY_10: 2063 /* The normal LEN field for this command is zero. */ 2064 memset(outbuf, 0, 8); 2065 blk_get_geometry(s->qdev.conf.blk, &nb_sectors); 2066 if (!nb_sectors) { 2067 scsi_check_condition(r, SENSE_CODE(LUN_NOT_READY)); 2068 return 0; 2069 } 2070 if ((req->cmd.buf[8] & 1) == 0 && req->cmd.lba) { 2071 goto illegal_request; 2072 } 2073 nb_sectors /= s->qdev.blocksize / BDRV_SECTOR_SIZE; 2074 /* Returned value is the address of the last sector. */ 2075 nb_sectors--; 2076 /* Remember the new size for read/write sanity checking. */ 2077 s->qdev.max_lba = nb_sectors; 2078 /* Clip to 2TB, instead of returning capacity modulo 2TB. */ 2079 if (nb_sectors > UINT32_MAX) { 2080 nb_sectors = UINT32_MAX; 2081 } 2082 outbuf[0] = (nb_sectors >> 24) & 0xff; 2083 outbuf[1] = (nb_sectors >> 16) & 0xff; 2084 outbuf[2] = (nb_sectors >> 8) & 0xff; 2085 outbuf[3] = nb_sectors & 0xff; 2086 outbuf[4] = 0; 2087 outbuf[5] = 0; 2088 outbuf[6] = s->qdev.blocksize >> 8; 2089 outbuf[7] = 0; 2090 break; 2091 case REQUEST_SENSE: 2092 /* Just return "NO SENSE". */ 2093 buflen = scsi_convert_sense(NULL, 0, outbuf, r->buflen, 2094 (req->cmd.buf[1] & 1) == 0); 2095 if (buflen < 0) { 2096 goto illegal_request; 2097 } 2098 break; 2099 case MECHANISM_STATUS: 2100 buflen = scsi_emulate_mechanism_status(s, outbuf); 2101 if (buflen < 0) { 2102 goto illegal_request; 2103 } 2104 break; 2105 case GET_CONFIGURATION: 2106 buflen = scsi_get_configuration(s, outbuf); 2107 if (buflen < 0) { 2108 goto illegal_request; 2109 } 2110 break; 2111 case GET_EVENT_STATUS_NOTIFICATION: 2112 buflen = scsi_get_event_status_notification(s, r, outbuf); 2113 if (buflen < 0) { 2114 goto illegal_request; 2115 } 2116 break; 2117 case READ_DISC_INFORMATION: 2118 buflen = scsi_read_disc_information(s, r, outbuf); 2119 if (buflen < 0) { 2120 goto illegal_request; 2121 } 2122 break; 2123 case READ_DVD_STRUCTURE: 2124 buflen = scsi_read_dvd_structure(s, r, outbuf); 2125 if (buflen < 0) { 2126 goto illegal_request; 2127 } 2128 break; 2129 case SERVICE_ACTION_IN_16: 2130 /* Service Action In subcommands. */ 2131 if ((req->cmd.buf[1] & 31) == SAI_READ_CAPACITY_16) { 2132 trace_scsi_disk_emulate_command_SAI_16(); 2133 memset(outbuf, 0, req->cmd.xfer); 2134 blk_get_geometry(s->qdev.conf.blk, &nb_sectors); 2135 if (!nb_sectors) { 2136 scsi_check_condition(r, SENSE_CODE(LUN_NOT_READY)); 2137 return 0; 2138 } 2139 if ((req->cmd.buf[14] & 1) == 0 && req->cmd.lba) { 2140 goto illegal_request; 2141 } 2142 nb_sectors /= s->qdev.blocksize / BDRV_SECTOR_SIZE; 2143 /* Returned value is the address of the last sector. */ 2144 nb_sectors--; 2145 /* Remember the new size for read/write sanity checking. */ 2146 s->qdev.max_lba = nb_sectors; 2147 outbuf[0] = (nb_sectors >> 56) & 0xff; 2148 outbuf[1] = (nb_sectors >> 48) & 0xff; 2149 outbuf[2] = (nb_sectors >> 40) & 0xff; 2150 outbuf[3] = (nb_sectors >> 32) & 0xff; 2151 outbuf[4] = (nb_sectors >> 24) & 0xff; 2152 outbuf[5] = (nb_sectors >> 16) & 0xff; 2153 outbuf[6] = (nb_sectors >> 8) & 0xff; 2154 outbuf[7] = nb_sectors & 0xff; 2155 outbuf[8] = 0; 2156 outbuf[9] = 0; 2157 outbuf[10] = s->qdev.blocksize >> 8; 2158 outbuf[11] = 0; 2159 outbuf[12] = 0; 2160 outbuf[13] = get_physical_block_exp(&s->qdev.conf); 2161 2162 /* set TPE bit if the format supports discard */ 2163 if (s->qdev.conf.discard_granularity) { 2164 outbuf[14] = 0x80; 2165 } 2166 2167 /* Protection, exponent and lowest lba field left blank. */ 2168 break; 2169 } 2170 trace_scsi_disk_emulate_command_SAI_unsupported(); 2171 goto illegal_request; 2172 case SYNCHRONIZE_CACHE: 2173 /* The request is used as the AIO opaque value, so add a ref. */ 2174 scsi_req_ref(&r->req); 2175 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 0, 2176 BLOCK_ACCT_FLUSH); 2177 r->req.aiocb = blk_aio_flush(s->qdev.conf.blk, scsi_aio_complete, r); 2178 return 0; 2179 case SEEK_10: 2180 trace_scsi_disk_emulate_command_SEEK_10(r->req.cmd.lba); 2181 if (r->req.cmd.lba > s->qdev.max_lba) { 2182 goto illegal_lba; 2183 } 2184 break; 2185 case MODE_SELECT: 2186 trace_scsi_disk_emulate_command_MODE_SELECT(r->req.cmd.xfer); 2187 break; 2188 case MODE_SELECT_10: 2189 trace_scsi_disk_emulate_command_MODE_SELECT_10(r->req.cmd.xfer); 2190 break; 2191 case UNMAP: 2192 trace_scsi_disk_emulate_command_UNMAP(r->req.cmd.xfer); 2193 break; 2194 case VERIFY_10: 2195 case VERIFY_12: 2196 case VERIFY_16: 2197 trace_scsi_disk_emulate_command_VERIFY((req->cmd.buf[1] >> 1) & 3); 2198 if (req->cmd.buf[1] & 6) { 2199 goto illegal_request; 2200 } 2201 break; 2202 case WRITE_SAME_10: 2203 case WRITE_SAME_16: 2204 trace_scsi_disk_emulate_command_WRITE_SAME( 2205 req->cmd.buf[0] == WRITE_SAME_10 ? 10 : 16, r->req.cmd.xfer); 2206 break; 2207 case FORMAT_UNIT: 2208 trace_scsi_disk_emulate_command_FORMAT_UNIT(r->req.cmd.xfer); 2209 break; 2210 default: 2211 trace_scsi_disk_emulate_command_UNKNOWN(buf[0], 2212 scsi_command_name(buf[0])); 2213 scsi_check_condition(r, SENSE_CODE(INVALID_OPCODE)); 2214 return 0; 2215 } 2216 assert(!r->req.aiocb); 2217 r->iov.iov_len = MIN(r->buflen, req->cmd.xfer); 2218 if (r->iov.iov_len == 0) { 2219 scsi_req_complete(&r->req, GOOD); 2220 } 2221 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) { 2222 assert(r->iov.iov_len == req->cmd.xfer); 2223 return -r->iov.iov_len; 2224 } else { 2225 return r->iov.iov_len; 2226 } 2227 2228 illegal_request: 2229 if (r->req.status == -1) { 2230 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); 2231 } 2232 return 0; 2233 2234 illegal_lba: 2235 scsi_check_condition(r, SENSE_CODE(LBA_OUT_OF_RANGE)); 2236 return 0; 2237 } 2238 2239 /* Execute a scsi command. Returns the length of the data expected by the 2240 command. This will be Positive for data transfers from the device 2241 (eg. disk reads), negative for transfers to the device (eg. disk writes), 2242 and zero if the command does not transfer any data. */ 2243 2244 static int32_t scsi_disk_dma_command(SCSIRequest *req, uint8_t *buf) 2245 { 2246 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 2247 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); 2248 SCSIDiskClass *sdc = (SCSIDiskClass *) object_get_class(OBJECT(s)); 2249 uint32_t len; 2250 uint8_t command; 2251 2252 command = buf[0]; 2253 2254 if (!blk_is_available(s->qdev.conf.blk)) { 2255 scsi_check_condition(r, SENSE_CODE(NO_MEDIUM)); 2256 return 0; 2257 } 2258 2259 len = scsi_data_cdb_xfer(r->req.cmd.buf); 2260 switch (command) { 2261 case READ_6: 2262 case READ_10: 2263 case READ_12: 2264 case READ_16: 2265 trace_scsi_disk_dma_command_READ(r->req.cmd.lba, len); 2266 /* Protection information is not supported. For SCSI versions 2 and 2267 * older (as determined by snooping the guest's INQUIRY commands), 2268 * there is no RD/WR/VRPROTECT, so skip this check in these versions. 2269 */ 2270 if (s->qdev.scsi_version > 2 && (r->req.cmd.buf[1] & 0xe0)) { 2271 goto illegal_request; 2272 } 2273 if (!check_lba_range(s, r->req.cmd.lba, len)) { 2274 goto illegal_lba; 2275 } 2276 r->sector = r->req.cmd.lba * (s->qdev.blocksize / BDRV_SECTOR_SIZE); 2277 r->sector_count = len * (s->qdev.blocksize / BDRV_SECTOR_SIZE); 2278 break; 2279 case WRITE_6: 2280 case WRITE_10: 2281 case WRITE_12: 2282 case WRITE_16: 2283 case WRITE_VERIFY_10: 2284 case WRITE_VERIFY_12: 2285 case WRITE_VERIFY_16: 2286 if (!blk_is_writable(s->qdev.conf.blk)) { 2287 scsi_check_condition(r, SENSE_CODE(WRITE_PROTECTED)); 2288 return 0; 2289 } 2290 trace_scsi_disk_dma_command_WRITE( 2291 (command & 0xe) == 0xe ? "And Verify " : "", 2292 r->req.cmd.lba, len); 2293 /* fall through */ 2294 case VERIFY_10: 2295 case VERIFY_12: 2296 case VERIFY_16: 2297 /* We get here only for BYTCHK == 0x01 and only for scsi-block. 2298 * As far as DMA is concerned, we can treat it the same as a write; 2299 * scsi_block_do_sgio will send VERIFY commands. 2300 */ 2301 if (s->qdev.scsi_version > 2 && (r->req.cmd.buf[1] & 0xe0)) { 2302 goto illegal_request; 2303 } 2304 if (!check_lba_range(s, r->req.cmd.lba, len)) { 2305 goto illegal_lba; 2306 } 2307 r->sector = r->req.cmd.lba * (s->qdev.blocksize / BDRV_SECTOR_SIZE); 2308 r->sector_count = len * (s->qdev.blocksize / BDRV_SECTOR_SIZE); 2309 break; 2310 default: 2311 abort(); 2312 illegal_request: 2313 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); 2314 return 0; 2315 illegal_lba: 2316 scsi_check_condition(r, SENSE_CODE(LBA_OUT_OF_RANGE)); 2317 return 0; 2318 } 2319 r->need_fua_emulation = sdc->need_fua_emulation(&r->req.cmd); 2320 if (r->sector_count == 0) { 2321 scsi_req_complete(&r->req, GOOD); 2322 } 2323 assert(r->iov.iov_len == 0); 2324 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) { 2325 return -r->sector_count * BDRV_SECTOR_SIZE; 2326 } else { 2327 return r->sector_count * BDRV_SECTOR_SIZE; 2328 } 2329 } 2330 2331 static void scsi_disk_reset(DeviceState *dev) 2332 { 2333 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev.qdev, dev); 2334 uint64_t nb_sectors; 2335 2336 scsi_device_purge_requests(&s->qdev, SENSE_CODE(RESET)); 2337 2338 blk_get_geometry(s->qdev.conf.blk, &nb_sectors); 2339 nb_sectors /= s->qdev.blocksize / BDRV_SECTOR_SIZE; 2340 if (nb_sectors) { 2341 nb_sectors--; 2342 } 2343 s->qdev.max_lba = nb_sectors; 2344 /* reset tray statuses */ 2345 s->tray_locked = 0; 2346 s->tray_open = 0; 2347 2348 s->qdev.scsi_version = s->qdev.default_scsi_version; 2349 } 2350 2351 static void scsi_disk_resize_cb(void *opaque) 2352 { 2353 SCSIDiskState *s = opaque; 2354 2355 /* SPC lists this sense code as available only for 2356 * direct-access devices. 2357 */ 2358 if (s->qdev.type == TYPE_DISK) { 2359 scsi_device_report_change(&s->qdev, SENSE_CODE(CAPACITY_CHANGED)); 2360 } 2361 } 2362 2363 static void scsi_cd_change_media_cb(void *opaque, bool load, Error **errp) 2364 { 2365 SCSIDiskState *s = opaque; 2366 2367 /* 2368 * When a CD gets changed, we have to report an ejected state and 2369 * then a loaded state to guests so that they detect tray 2370 * open/close and media change events. Guests that do not use 2371 * GET_EVENT_STATUS_NOTIFICATION to detect such tray open/close 2372 * states rely on this behavior. 2373 * 2374 * media_changed governs the state machine used for unit attention 2375 * report. media_event is used by GET EVENT STATUS NOTIFICATION. 2376 */ 2377 s->media_changed = load; 2378 s->tray_open = !load; 2379 scsi_device_set_ua(&s->qdev, SENSE_CODE(UNIT_ATTENTION_NO_MEDIUM)); 2380 s->media_event = true; 2381 s->eject_request = false; 2382 } 2383 2384 static void scsi_cd_eject_request_cb(void *opaque, bool force) 2385 { 2386 SCSIDiskState *s = opaque; 2387 2388 s->eject_request = true; 2389 if (force) { 2390 s->tray_locked = false; 2391 } 2392 } 2393 2394 static bool scsi_cd_is_tray_open(void *opaque) 2395 { 2396 return ((SCSIDiskState *)opaque)->tray_open; 2397 } 2398 2399 static bool scsi_cd_is_medium_locked(void *opaque) 2400 { 2401 return ((SCSIDiskState *)opaque)->tray_locked; 2402 } 2403 2404 static const BlockDevOps scsi_disk_removable_block_ops = { 2405 .change_media_cb = scsi_cd_change_media_cb, 2406 .eject_request_cb = scsi_cd_eject_request_cb, 2407 .is_tray_open = scsi_cd_is_tray_open, 2408 .is_medium_locked = scsi_cd_is_medium_locked, 2409 2410 .resize_cb = scsi_disk_resize_cb, 2411 }; 2412 2413 static const BlockDevOps scsi_disk_block_ops = { 2414 .resize_cb = scsi_disk_resize_cb, 2415 }; 2416 2417 static void scsi_disk_unit_attention_reported(SCSIDevice *dev) 2418 { 2419 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); 2420 if (s->media_changed) { 2421 s->media_changed = false; 2422 scsi_device_set_ua(&s->qdev, SENSE_CODE(MEDIUM_CHANGED)); 2423 } 2424 } 2425 2426 static void scsi_realize(SCSIDevice *dev, Error **errp) 2427 { 2428 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); 2429 bool read_only; 2430 2431 if (!s->qdev.conf.blk) { 2432 error_setg(errp, "drive property not set"); 2433 return; 2434 } 2435 2436 if (!(s->features & (1 << SCSI_DISK_F_REMOVABLE)) && 2437 !blk_is_inserted(s->qdev.conf.blk)) { 2438 error_setg(errp, "Device needs media, but drive is empty"); 2439 return; 2440 } 2441 2442 if (!blkconf_blocksizes(&s->qdev.conf, errp)) { 2443 return; 2444 } 2445 2446 if (blk_get_aio_context(s->qdev.conf.blk) != qemu_get_aio_context() && 2447 !s->qdev.hba_supports_iothread) 2448 { 2449 error_setg(errp, "HBA does not support iothreads"); 2450 return; 2451 } 2452 2453 if (dev->type == TYPE_DISK) { 2454 if (!blkconf_geometry(&dev->conf, NULL, 65535, 255, 255, errp)) { 2455 return; 2456 } 2457 } 2458 2459 read_only = !blk_supports_write_perm(s->qdev.conf.blk); 2460 if (dev->type == TYPE_ROM) { 2461 read_only = true; 2462 } 2463 2464 if (!blkconf_apply_backend_options(&dev->conf, read_only, 2465 dev->type == TYPE_DISK, errp)) { 2466 return; 2467 } 2468 2469 if (s->qdev.conf.discard_granularity == -1) { 2470 s->qdev.conf.discard_granularity = 2471 MAX(s->qdev.conf.logical_block_size, DEFAULT_DISCARD_GRANULARITY); 2472 } 2473 2474 if (!s->version) { 2475 s->version = g_strdup(qemu_hw_version()); 2476 } 2477 if (!s->vendor) { 2478 s->vendor = g_strdup("QEMU"); 2479 } 2480 if (!s->device_id) { 2481 if (s->serial) { 2482 s->device_id = g_strdup_printf("%.20s", s->serial); 2483 } else { 2484 const char *str = blk_name(s->qdev.conf.blk); 2485 if (str && *str) { 2486 s->device_id = g_strdup(str); 2487 } 2488 } 2489 } 2490 2491 if (blk_is_sg(s->qdev.conf.blk)) { 2492 error_setg(errp, "unwanted /dev/sg*"); 2493 return; 2494 } 2495 2496 if ((s->features & (1 << SCSI_DISK_F_REMOVABLE)) && 2497 !(s->features & (1 << SCSI_DISK_F_NO_REMOVABLE_DEVOPS))) { 2498 blk_set_dev_ops(s->qdev.conf.blk, &scsi_disk_removable_block_ops, s); 2499 } else { 2500 blk_set_dev_ops(s->qdev.conf.blk, &scsi_disk_block_ops, s); 2501 } 2502 2503 blk_iostatus_enable(s->qdev.conf.blk); 2504 2505 add_boot_device_lchs(&dev->qdev, NULL, 2506 dev->conf.lcyls, 2507 dev->conf.lheads, 2508 dev->conf.lsecs); 2509 } 2510 2511 static void scsi_unrealize(SCSIDevice *dev) 2512 { 2513 del_boot_device_lchs(&dev->qdev, NULL); 2514 } 2515 2516 static void scsi_hd_realize(SCSIDevice *dev, Error **errp) 2517 { 2518 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); 2519 AioContext *ctx = NULL; 2520 /* can happen for devices without drive. The error message for missing 2521 * backend will be issued in scsi_realize 2522 */ 2523 if (s->qdev.conf.blk) { 2524 ctx = blk_get_aio_context(s->qdev.conf.blk); 2525 aio_context_acquire(ctx); 2526 if (!blkconf_blocksizes(&s->qdev.conf, errp)) { 2527 goto out; 2528 } 2529 } 2530 s->qdev.blocksize = s->qdev.conf.logical_block_size; 2531 s->qdev.type = TYPE_DISK; 2532 if (!s->product) { 2533 s->product = g_strdup("QEMU HARDDISK"); 2534 } 2535 scsi_realize(&s->qdev, errp); 2536 out: 2537 if (ctx) { 2538 aio_context_release(ctx); 2539 } 2540 } 2541 2542 static void scsi_cd_realize(SCSIDevice *dev, Error **errp) 2543 { 2544 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); 2545 AioContext *ctx; 2546 int ret; 2547 2548 if (!dev->conf.blk) { 2549 /* Anonymous BlockBackend for an empty drive. As we put it into 2550 * dev->conf, qdev takes care of detaching on unplug. */ 2551 dev->conf.blk = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL); 2552 ret = blk_attach_dev(dev->conf.blk, &dev->qdev); 2553 assert(ret == 0); 2554 } 2555 2556 ctx = blk_get_aio_context(dev->conf.blk); 2557 aio_context_acquire(ctx); 2558 s->qdev.blocksize = 2048; 2559 s->qdev.type = TYPE_ROM; 2560 s->features |= 1 << SCSI_DISK_F_REMOVABLE; 2561 if (!s->product) { 2562 s->product = g_strdup("QEMU CD-ROM"); 2563 } 2564 scsi_realize(&s->qdev, errp); 2565 aio_context_release(ctx); 2566 } 2567 2568 2569 static const SCSIReqOps scsi_disk_emulate_reqops = { 2570 .size = sizeof(SCSIDiskReq), 2571 .free_req = scsi_free_request, 2572 .send_command = scsi_disk_emulate_command, 2573 .read_data = scsi_disk_emulate_read_data, 2574 .write_data = scsi_disk_emulate_write_data, 2575 .get_buf = scsi_get_buf, 2576 }; 2577 2578 static const SCSIReqOps scsi_disk_dma_reqops = { 2579 .size = sizeof(SCSIDiskReq), 2580 .free_req = scsi_free_request, 2581 .send_command = scsi_disk_dma_command, 2582 .read_data = scsi_read_data, 2583 .write_data = scsi_write_data, 2584 .get_buf = scsi_get_buf, 2585 .load_request = scsi_disk_load_request, 2586 .save_request = scsi_disk_save_request, 2587 }; 2588 2589 static const SCSIReqOps *const scsi_disk_reqops_dispatch[256] = { 2590 [TEST_UNIT_READY] = &scsi_disk_emulate_reqops, 2591 [INQUIRY] = &scsi_disk_emulate_reqops, 2592 [MODE_SENSE] = &scsi_disk_emulate_reqops, 2593 [MODE_SENSE_10] = &scsi_disk_emulate_reqops, 2594 [START_STOP] = &scsi_disk_emulate_reqops, 2595 [ALLOW_MEDIUM_REMOVAL] = &scsi_disk_emulate_reqops, 2596 [READ_CAPACITY_10] = &scsi_disk_emulate_reqops, 2597 [READ_TOC] = &scsi_disk_emulate_reqops, 2598 [READ_DVD_STRUCTURE] = &scsi_disk_emulate_reqops, 2599 [READ_DISC_INFORMATION] = &scsi_disk_emulate_reqops, 2600 [GET_CONFIGURATION] = &scsi_disk_emulate_reqops, 2601 [GET_EVENT_STATUS_NOTIFICATION] = &scsi_disk_emulate_reqops, 2602 [MECHANISM_STATUS] = &scsi_disk_emulate_reqops, 2603 [SERVICE_ACTION_IN_16] = &scsi_disk_emulate_reqops, 2604 [REQUEST_SENSE] = &scsi_disk_emulate_reqops, 2605 [SYNCHRONIZE_CACHE] = &scsi_disk_emulate_reqops, 2606 [SEEK_10] = &scsi_disk_emulate_reqops, 2607 [MODE_SELECT] = &scsi_disk_emulate_reqops, 2608 [MODE_SELECT_10] = &scsi_disk_emulate_reqops, 2609 [UNMAP] = &scsi_disk_emulate_reqops, 2610 [WRITE_SAME_10] = &scsi_disk_emulate_reqops, 2611 [WRITE_SAME_16] = &scsi_disk_emulate_reqops, 2612 [VERIFY_10] = &scsi_disk_emulate_reqops, 2613 [VERIFY_12] = &scsi_disk_emulate_reqops, 2614 [VERIFY_16] = &scsi_disk_emulate_reqops, 2615 [FORMAT_UNIT] = &scsi_disk_emulate_reqops, 2616 2617 [READ_6] = &scsi_disk_dma_reqops, 2618 [READ_10] = &scsi_disk_dma_reqops, 2619 [READ_12] = &scsi_disk_dma_reqops, 2620 [READ_16] = &scsi_disk_dma_reqops, 2621 [WRITE_6] = &scsi_disk_dma_reqops, 2622 [WRITE_10] = &scsi_disk_dma_reqops, 2623 [WRITE_12] = &scsi_disk_dma_reqops, 2624 [WRITE_16] = &scsi_disk_dma_reqops, 2625 [WRITE_VERIFY_10] = &scsi_disk_dma_reqops, 2626 [WRITE_VERIFY_12] = &scsi_disk_dma_reqops, 2627 [WRITE_VERIFY_16] = &scsi_disk_dma_reqops, 2628 }; 2629 2630 static void scsi_disk_new_request_dump(uint32_t lun, uint32_t tag, uint8_t *buf) 2631 { 2632 int i; 2633 int len = scsi_cdb_length(buf); 2634 char *line_buffer, *p; 2635 2636 assert(len > 0 && len <= 16); 2637 line_buffer = g_malloc(len * 5 + 1); 2638 2639 for (i = 0, p = line_buffer; i < len; i++) { 2640 p += sprintf(p, " 0x%02x", buf[i]); 2641 } 2642 trace_scsi_disk_new_request(lun, tag, line_buffer); 2643 2644 g_free(line_buffer); 2645 } 2646 2647 static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun, 2648 uint8_t *buf, void *hba_private) 2649 { 2650 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); 2651 SCSIRequest *req; 2652 const SCSIReqOps *ops; 2653 uint8_t command; 2654 2655 command = buf[0]; 2656 ops = scsi_disk_reqops_dispatch[command]; 2657 if (!ops) { 2658 ops = &scsi_disk_emulate_reqops; 2659 } 2660 req = scsi_req_alloc(ops, &s->qdev, tag, lun, hba_private); 2661 2662 if (trace_event_get_state_backends(TRACE_SCSI_DISK_NEW_REQUEST)) { 2663 scsi_disk_new_request_dump(lun, tag, buf); 2664 } 2665 2666 return req; 2667 } 2668 2669 #ifdef __linux__ 2670 static int get_device_type(SCSIDiskState *s) 2671 { 2672 uint8_t cmd[16]; 2673 uint8_t buf[36]; 2674 int ret; 2675 2676 memset(cmd, 0, sizeof(cmd)); 2677 memset(buf, 0, sizeof(buf)); 2678 cmd[0] = INQUIRY; 2679 cmd[4] = sizeof(buf); 2680 2681 ret = scsi_SG_IO_FROM_DEV(s->qdev.conf.blk, cmd, sizeof(cmd), 2682 buf, sizeof(buf), s->qdev.io_timeout); 2683 if (ret < 0) { 2684 return -1; 2685 } 2686 s->qdev.type = buf[0]; 2687 if (buf[1] & 0x80) { 2688 s->features |= 1 << SCSI_DISK_F_REMOVABLE; 2689 } 2690 return 0; 2691 } 2692 2693 static void scsi_block_realize(SCSIDevice *dev, Error **errp) 2694 { 2695 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); 2696 AioContext *ctx; 2697 int sg_version; 2698 int rc; 2699 2700 if (!s->qdev.conf.blk) { 2701 error_setg(errp, "drive property not set"); 2702 return; 2703 } 2704 2705 if (s->rotation_rate) { 2706 error_report_once("rotation_rate is specified for scsi-block but is " 2707 "not implemented. This option is deprecated and will " 2708 "be removed in a future version"); 2709 } 2710 2711 ctx = blk_get_aio_context(s->qdev.conf.blk); 2712 aio_context_acquire(ctx); 2713 2714 /* check we are using a driver managing SG_IO (version 3 and after) */ 2715 rc = blk_ioctl(s->qdev.conf.blk, SG_GET_VERSION_NUM, &sg_version); 2716 if (rc < 0) { 2717 error_setg_errno(errp, -rc, "cannot get SG_IO version number"); 2718 if (rc != -EPERM) { 2719 error_append_hint(errp, "Is this a SCSI device?\n"); 2720 } 2721 goto out; 2722 } 2723 if (sg_version < 30000) { 2724 error_setg(errp, "scsi generic interface too old"); 2725 goto out; 2726 } 2727 2728 /* get device type from INQUIRY data */ 2729 rc = get_device_type(s); 2730 if (rc < 0) { 2731 error_setg(errp, "INQUIRY failed"); 2732 goto out; 2733 } 2734 2735 /* Make a guess for the block size, we'll fix it when the guest sends. 2736 * READ CAPACITY. If they don't, they likely would assume these sizes 2737 * anyway. (TODO: check in /sys). 2738 */ 2739 if (s->qdev.type == TYPE_ROM || s->qdev.type == TYPE_WORM) { 2740 s->qdev.blocksize = 2048; 2741 } else { 2742 s->qdev.blocksize = 512; 2743 } 2744 2745 /* Makes the scsi-block device not removable by using HMP and QMP eject 2746 * command. 2747 */ 2748 s->features |= (1 << SCSI_DISK_F_NO_REMOVABLE_DEVOPS); 2749 2750 scsi_realize(&s->qdev, errp); 2751 scsi_generic_read_device_inquiry(&s->qdev); 2752 2753 out: 2754 aio_context_release(ctx); 2755 } 2756 2757 typedef struct SCSIBlockReq { 2758 SCSIDiskReq req; 2759 sg_io_hdr_t io_header; 2760 2761 /* Selected bytes of the original CDB, copied into our own CDB. */ 2762 uint8_t cmd, cdb1, group_number; 2763 2764 /* CDB passed to SG_IO. */ 2765 uint8_t cdb[16]; 2766 BlockCompletionFunc *cb; 2767 void *cb_opaque; 2768 } SCSIBlockReq; 2769 2770 static void scsi_block_sgio_complete(void *opaque, int ret) 2771 { 2772 SCSIBlockReq *req = (SCSIBlockReq *)opaque; 2773 SCSIDiskReq *r = &req->req; 2774 SCSIDevice *s = r->req.dev; 2775 sg_io_hdr_t *io_hdr = &req->io_header; 2776 2777 if (ret == 0) { 2778 if (io_hdr->host_status != SCSI_HOST_OK) { 2779 scsi_req_complete_failed(&r->req, io_hdr->host_status); 2780 scsi_req_unref(&r->req); 2781 return; 2782 } 2783 2784 if (io_hdr->driver_status & SG_ERR_DRIVER_TIMEOUT) { 2785 ret = BUSY; 2786 } else { 2787 ret = io_hdr->status; 2788 } 2789 2790 if (ret > 0) { 2791 aio_context_acquire(blk_get_aio_context(s->conf.blk)); 2792 if (scsi_handle_rw_error(r, ret, true)) { 2793 aio_context_release(blk_get_aio_context(s->conf.blk)); 2794 scsi_req_unref(&r->req); 2795 return; 2796 } 2797 aio_context_release(blk_get_aio_context(s->conf.blk)); 2798 2799 /* Ignore error. */ 2800 ret = 0; 2801 } 2802 } 2803 2804 req->cb(req->cb_opaque, ret); 2805 } 2806 2807 static BlockAIOCB *scsi_block_do_sgio(SCSIBlockReq *req, 2808 int64_t offset, QEMUIOVector *iov, 2809 int direction, 2810 BlockCompletionFunc *cb, void *opaque) 2811 { 2812 sg_io_hdr_t *io_header = &req->io_header; 2813 SCSIDiskReq *r = &req->req; 2814 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 2815 int nb_logical_blocks; 2816 uint64_t lba; 2817 BlockAIOCB *aiocb; 2818 2819 /* This is not supported yet. It can only happen if the guest does 2820 * reads and writes that are not aligned to one logical sectors 2821 * _and_ cover multiple MemoryRegions. 2822 */ 2823 assert(offset % s->qdev.blocksize == 0); 2824 assert(iov->size % s->qdev.blocksize == 0); 2825 2826 io_header->interface_id = 'S'; 2827 2828 /* The data transfer comes from the QEMUIOVector. */ 2829 io_header->dxfer_direction = direction; 2830 io_header->dxfer_len = iov->size; 2831 io_header->dxferp = (void *)iov->iov; 2832 io_header->iovec_count = iov->niov; 2833 assert(io_header->iovec_count == iov->niov); /* no overflow! */ 2834 2835 /* Build a new CDB with the LBA and length patched in, in case 2836 * DMA helpers split the transfer in multiple segments. Do not 2837 * build a CDB smaller than what the guest wanted, and only build 2838 * a larger one if strictly necessary. 2839 */ 2840 io_header->cmdp = req->cdb; 2841 lba = offset / s->qdev.blocksize; 2842 nb_logical_blocks = io_header->dxfer_len / s->qdev.blocksize; 2843 2844 if ((req->cmd >> 5) == 0 && lba <= 0x1ffff) { 2845 /* 6-byte CDB */ 2846 stl_be_p(&req->cdb[0], lba | (req->cmd << 24)); 2847 req->cdb[4] = nb_logical_blocks; 2848 req->cdb[5] = 0; 2849 io_header->cmd_len = 6; 2850 } else if ((req->cmd >> 5) <= 1 && lba <= 0xffffffffULL) { 2851 /* 10-byte CDB */ 2852 req->cdb[0] = (req->cmd & 0x1f) | 0x20; 2853 req->cdb[1] = req->cdb1; 2854 stl_be_p(&req->cdb[2], lba); 2855 req->cdb[6] = req->group_number; 2856 stw_be_p(&req->cdb[7], nb_logical_blocks); 2857 req->cdb[9] = 0; 2858 io_header->cmd_len = 10; 2859 } else if ((req->cmd >> 5) != 4 && lba <= 0xffffffffULL) { 2860 /* 12-byte CDB */ 2861 req->cdb[0] = (req->cmd & 0x1f) | 0xA0; 2862 req->cdb[1] = req->cdb1; 2863 stl_be_p(&req->cdb[2], lba); 2864 stl_be_p(&req->cdb[6], nb_logical_blocks); 2865 req->cdb[10] = req->group_number; 2866 req->cdb[11] = 0; 2867 io_header->cmd_len = 12; 2868 } else { 2869 /* 16-byte CDB */ 2870 req->cdb[0] = (req->cmd & 0x1f) | 0x80; 2871 req->cdb[1] = req->cdb1; 2872 stq_be_p(&req->cdb[2], lba); 2873 stl_be_p(&req->cdb[10], nb_logical_blocks); 2874 req->cdb[14] = req->group_number; 2875 req->cdb[15] = 0; 2876 io_header->cmd_len = 16; 2877 } 2878 2879 /* The rest is as in scsi-generic.c. */ 2880 io_header->mx_sb_len = sizeof(r->req.sense); 2881 io_header->sbp = r->req.sense; 2882 io_header->timeout = s->qdev.io_timeout * 1000; 2883 io_header->usr_ptr = r; 2884 io_header->flags |= SG_FLAG_DIRECT_IO; 2885 req->cb = cb; 2886 req->cb_opaque = opaque; 2887 trace_scsi_disk_aio_sgio_command(r->req.tag, req->cdb[0], lba, 2888 nb_logical_blocks, io_header->timeout); 2889 aiocb = blk_aio_ioctl(s->qdev.conf.blk, SG_IO, io_header, scsi_block_sgio_complete, req); 2890 assert(aiocb != NULL); 2891 return aiocb; 2892 } 2893 2894 static bool scsi_block_no_fua(SCSICommand *cmd) 2895 { 2896 return false; 2897 } 2898 2899 static BlockAIOCB *scsi_block_dma_readv(int64_t offset, 2900 QEMUIOVector *iov, 2901 BlockCompletionFunc *cb, void *cb_opaque, 2902 void *opaque) 2903 { 2904 SCSIBlockReq *r = opaque; 2905 return scsi_block_do_sgio(r, offset, iov, 2906 SG_DXFER_FROM_DEV, cb, cb_opaque); 2907 } 2908 2909 static BlockAIOCB *scsi_block_dma_writev(int64_t offset, 2910 QEMUIOVector *iov, 2911 BlockCompletionFunc *cb, void *cb_opaque, 2912 void *opaque) 2913 { 2914 SCSIBlockReq *r = opaque; 2915 return scsi_block_do_sgio(r, offset, iov, 2916 SG_DXFER_TO_DEV, cb, cb_opaque); 2917 } 2918 2919 static bool scsi_block_is_passthrough(SCSIDiskState *s, uint8_t *buf) 2920 { 2921 switch (buf[0]) { 2922 case VERIFY_10: 2923 case VERIFY_12: 2924 case VERIFY_16: 2925 /* Check if BYTCHK == 0x01 (data-out buffer contains data 2926 * for the number of logical blocks specified in the length 2927 * field). For other modes, do not use scatter/gather operation. 2928 */ 2929 if ((buf[1] & 6) == 2) { 2930 return false; 2931 } 2932 break; 2933 2934 case READ_6: 2935 case READ_10: 2936 case READ_12: 2937 case READ_16: 2938 case WRITE_6: 2939 case WRITE_10: 2940 case WRITE_12: 2941 case WRITE_16: 2942 case WRITE_VERIFY_10: 2943 case WRITE_VERIFY_12: 2944 case WRITE_VERIFY_16: 2945 /* MMC writing cannot be done via DMA helpers, because it sometimes 2946 * involves writing beyond the maximum LBA or to negative LBA (lead-in). 2947 * We might use scsi_block_dma_reqops as long as no writing commands are 2948 * seen, but performance usually isn't paramount on optical media. So, 2949 * just make scsi-block operate the same as scsi-generic for them. 2950 */ 2951 if (s->qdev.type != TYPE_ROM) { 2952 return false; 2953 } 2954 break; 2955 2956 default: 2957 break; 2958 } 2959 2960 return true; 2961 } 2962 2963 2964 static int32_t scsi_block_dma_command(SCSIRequest *req, uint8_t *buf) 2965 { 2966 SCSIBlockReq *r = (SCSIBlockReq *)req; 2967 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); 2968 2969 r->cmd = req->cmd.buf[0]; 2970 switch (r->cmd >> 5) { 2971 case 0: 2972 /* 6-byte CDB. */ 2973 r->cdb1 = r->group_number = 0; 2974 break; 2975 case 1: 2976 /* 10-byte CDB. */ 2977 r->cdb1 = req->cmd.buf[1]; 2978 r->group_number = req->cmd.buf[6]; 2979 break; 2980 case 4: 2981 /* 12-byte CDB. */ 2982 r->cdb1 = req->cmd.buf[1]; 2983 r->group_number = req->cmd.buf[10]; 2984 break; 2985 case 5: 2986 /* 16-byte CDB. */ 2987 r->cdb1 = req->cmd.buf[1]; 2988 r->group_number = req->cmd.buf[14]; 2989 break; 2990 default: 2991 abort(); 2992 } 2993 2994 /* Protection information is not supported. For SCSI versions 2 and 2995 * older (as determined by snooping the guest's INQUIRY commands), 2996 * there is no RD/WR/VRPROTECT, so skip this check in these versions. 2997 */ 2998 if (s->qdev.scsi_version > 2 && (req->cmd.buf[1] & 0xe0)) { 2999 scsi_check_condition(&r->req, SENSE_CODE(INVALID_FIELD)); 3000 return 0; 3001 } 3002 3003 return scsi_disk_dma_command(req, buf); 3004 } 3005 3006 static const SCSIReqOps scsi_block_dma_reqops = { 3007 .size = sizeof(SCSIBlockReq), 3008 .free_req = scsi_free_request, 3009 .send_command = scsi_block_dma_command, 3010 .read_data = scsi_read_data, 3011 .write_data = scsi_write_data, 3012 .get_buf = scsi_get_buf, 3013 .load_request = scsi_disk_load_request, 3014 .save_request = scsi_disk_save_request, 3015 }; 3016 3017 static SCSIRequest *scsi_block_new_request(SCSIDevice *d, uint32_t tag, 3018 uint32_t lun, uint8_t *buf, 3019 void *hba_private) 3020 { 3021 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); 3022 3023 if (scsi_block_is_passthrough(s, buf)) { 3024 return scsi_req_alloc(&scsi_generic_req_ops, &s->qdev, tag, lun, 3025 hba_private); 3026 } else { 3027 return scsi_req_alloc(&scsi_block_dma_reqops, &s->qdev, tag, lun, 3028 hba_private); 3029 } 3030 } 3031 3032 static int scsi_block_parse_cdb(SCSIDevice *d, SCSICommand *cmd, 3033 uint8_t *buf, size_t buf_len, 3034 void *hba_private) 3035 { 3036 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); 3037 3038 if (scsi_block_is_passthrough(s, buf)) { 3039 return scsi_bus_parse_cdb(&s->qdev, cmd, buf, buf_len, hba_private); 3040 } else { 3041 return scsi_req_parse_cdb(&s->qdev, cmd, buf, buf_len); 3042 } 3043 } 3044 3045 static void scsi_block_update_sense(SCSIRequest *req) 3046 { 3047 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); 3048 SCSIBlockReq *br = DO_UPCAST(SCSIBlockReq, req, r); 3049 r->req.sense_len = MIN(br->io_header.sb_len_wr, sizeof(r->req.sense)); 3050 } 3051 #endif 3052 3053 static 3054 BlockAIOCB *scsi_dma_readv(int64_t offset, QEMUIOVector *iov, 3055 BlockCompletionFunc *cb, void *cb_opaque, 3056 void *opaque) 3057 { 3058 SCSIDiskReq *r = opaque; 3059 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 3060 return blk_aio_preadv(s->qdev.conf.blk, offset, iov, 0, cb, cb_opaque); 3061 } 3062 3063 static 3064 BlockAIOCB *scsi_dma_writev(int64_t offset, QEMUIOVector *iov, 3065 BlockCompletionFunc *cb, void *cb_opaque, 3066 void *opaque) 3067 { 3068 SCSIDiskReq *r = opaque; 3069 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); 3070 return blk_aio_pwritev(s->qdev.conf.blk, offset, iov, 0, cb, cb_opaque); 3071 } 3072 3073 static void scsi_disk_base_class_initfn(ObjectClass *klass, void *data) 3074 { 3075 DeviceClass *dc = DEVICE_CLASS(klass); 3076 SCSIDiskClass *sdc = SCSI_DISK_BASE_CLASS(klass); 3077 3078 dc->fw_name = "disk"; 3079 dc->reset = scsi_disk_reset; 3080 sdc->dma_readv = scsi_dma_readv; 3081 sdc->dma_writev = scsi_dma_writev; 3082 sdc->need_fua_emulation = scsi_is_cmd_fua; 3083 } 3084 3085 static const TypeInfo scsi_disk_base_info = { 3086 .name = TYPE_SCSI_DISK_BASE, 3087 .parent = TYPE_SCSI_DEVICE, 3088 .class_init = scsi_disk_base_class_initfn, 3089 .instance_size = sizeof(SCSIDiskState), 3090 .class_size = sizeof(SCSIDiskClass), 3091 .abstract = true, 3092 }; 3093 3094 #define DEFINE_SCSI_DISK_PROPERTIES() \ 3095 DEFINE_PROP_DRIVE_IOTHREAD("drive", SCSIDiskState, qdev.conf.blk), \ 3096 DEFINE_BLOCK_PROPERTIES_BASE(SCSIDiskState, qdev.conf), \ 3097 DEFINE_BLOCK_ERROR_PROPERTIES(SCSIDiskState, qdev.conf), \ 3098 DEFINE_PROP_STRING("ver", SCSIDiskState, version), \ 3099 DEFINE_PROP_STRING("serial", SCSIDiskState, serial), \ 3100 DEFINE_PROP_STRING("vendor", SCSIDiskState, vendor), \ 3101 DEFINE_PROP_STRING("product", SCSIDiskState, product), \ 3102 DEFINE_PROP_STRING("device_id", SCSIDiskState, device_id) 3103 3104 3105 static Property scsi_hd_properties[] = { 3106 DEFINE_SCSI_DISK_PROPERTIES(), 3107 DEFINE_PROP_BIT("removable", SCSIDiskState, features, 3108 SCSI_DISK_F_REMOVABLE, false), 3109 DEFINE_PROP_BIT("dpofua", SCSIDiskState, features, 3110 SCSI_DISK_F_DPOFUA, false), 3111 DEFINE_PROP_UINT64("wwn", SCSIDiskState, qdev.wwn, 0), 3112 DEFINE_PROP_UINT64("port_wwn", SCSIDiskState, qdev.port_wwn, 0), 3113 DEFINE_PROP_UINT16("port_index", SCSIDiskState, port_index, 0), 3114 DEFINE_PROP_UINT64("max_unmap_size", SCSIDiskState, max_unmap_size, 3115 DEFAULT_MAX_UNMAP_SIZE), 3116 DEFINE_PROP_UINT64("max_io_size", SCSIDiskState, max_io_size, 3117 DEFAULT_MAX_IO_SIZE), 3118 DEFINE_PROP_UINT16("rotation_rate", SCSIDiskState, rotation_rate, 0), 3119 DEFINE_PROP_INT32("scsi_version", SCSIDiskState, qdev.default_scsi_version, 3120 5), 3121 DEFINE_PROP_BIT("quirk_mode_page_vendor_specific_apple", SCSIDiskState, 3122 quirks, SCSI_DISK_QUIRK_MODE_PAGE_VENDOR_SPECIFIC_APPLE, 3123 0), 3124 DEFINE_BLOCK_CHS_PROPERTIES(SCSIDiskState, qdev.conf), 3125 DEFINE_PROP_END_OF_LIST(), 3126 }; 3127 3128 static const VMStateDescription vmstate_scsi_disk_state = { 3129 .name = "scsi-disk", 3130 .version_id = 1, 3131 .minimum_version_id = 1, 3132 .fields = (VMStateField[]) { 3133 VMSTATE_SCSI_DEVICE(qdev, SCSIDiskState), 3134 VMSTATE_BOOL(media_changed, SCSIDiskState), 3135 VMSTATE_BOOL(media_event, SCSIDiskState), 3136 VMSTATE_BOOL(eject_request, SCSIDiskState), 3137 VMSTATE_BOOL(tray_open, SCSIDiskState), 3138 VMSTATE_BOOL(tray_locked, SCSIDiskState), 3139 VMSTATE_END_OF_LIST() 3140 } 3141 }; 3142 3143 static void scsi_hd_class_initfn(ObjectClass *klass, void *data) 3144 { 3145 DeviceClass *dc = DEVICE_CLASS(klass); 3146 SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass); 3147 3148 sc->realize = scsi_hd_realize; 3149 sc->unrealize = scsi_unrealize; 3150 sc->alloc_req = scsi_new_request; 3151 sc->unit_attention_reported = scsi_disk_unit_attention_reported; 3152 dc->desc = "virtual SCSI disk"; 3153 device_class_set_props(dc, scsi_hd_properties); 3154 dc->vmsd = &vmstate_scsi_disk_state; 3155 } 3156 3157 static const TypeInfo scsi_hd_info = { 3158 .name = "scsi-hd", 3159 .parent = TYPE_SCSI_DISK_BASE, 3160 .class_init = scsi_hd_class_initfn, 3161 }; 3162 3163 static Property scsi_cd_properties[] = { 3164 DEFINE_SCSI_DISK_PROPERTIES(), 3165 DEFINE_PROP_UINT64("wwn", SCSIDiskState, qdev.wwn, 0), 3166 DEFINE_PROP_UINT64("port_wwn", SCSIDiskState, qdev.port_wwn, 0), 3167 DEFINE_PROP_UINT16("port_index", SCSIDiskState, port_index, 0), 3168 DEFINE_PROP_UINT64("max_io_size", SCSIDiskState, max_io_size, 3169 DEFAULT_MAX_IO_SIZE), 3170 DEFINE_PROP_INT32("scsi_version", SCSIDiskState, qdev.default_scsi_version, 3171 5), 3172 DEFINE_PROP_BIT("quirk_mode_page_apple_vendor", SCSIDiskState, quirks, 3173 SCSI_DISK_QUIRK_MODE_PAGE_APPLE_VENDOR, 0), 3174 DEFINE_PROP_BIT("quirk_mode_sense_rom_use_dbd", SCSIDiskState, quirks, 3175 SCSI_DISK_QUIRK_MODE_SENSE_ROM_USE_DBD, 0), 3176 DEFINE_PROP_BIT("quirk_mode_page_vendor_specific_apple", SCSIDiskState, 3177 quirks, SCSI_DISK_QUIRK_MODE_PAGE_VENDOR_SPECIFIC_APPLE, 3178 0), 3179 DEFINE_PROP_BIT("quirk_mode_page_truncated", SCSIDiskState, quirks, 3180 SCSI_DISK_QUIRK_MODE_PAGE_TRUNCATED, 0), 3181 DEFINE_PROP_END_OF_LIST(), 3182 }; 3183 3184 static void scsi_cd_class_initfn(ObjectClass *klass, void *data) 3185 { 3186 DeviceClass *dc = DEVICE_CLASS(klass); 3187 SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass); 3188 3189 sc->realize = scsi_cd_realize; 3190 sc->alloc_req = scsi_new_request; 3191 sc->unit_attention_reported = scsi_disk_unit_attention_reported; 3192 dc->desc = "virtual SCSI CD-ROM"; 3193 device_class_set_props(dc, scsi_cd_properties); 3194 dc->vmsd = &vmstate_scsi_disk_state; 3195 } 3196 3197 static const TypeInfo scsi_cd_info = { 3198 .name = "scsi-cd", 3199 .parent = TYPE_SCSI_DISK_BASE, 3200 .class_init = scsi_cd_class_initfn, 3201 }; 3202 3203 #ifdef __linux__ 3204 static Property scsi_block_properties[] = { 3205 DEFINE_BLOCK_ERROR_PROPERTIES(SCSIDiskState, qdev.conf), 3206 DEFINE_PROP_DRIVE("drive", SCSIDiskState, qdev.conf.blk), 3207 DEFINE_PROP_BOOL("share-rw", SCSIDiskState, qdev.conf.share_rw, false), 3208 DEFINE_PROP_UINT16("rotation_rate", SCSIDiskState, rotation_rate, 0), 3209 DEFINE_PROP_UINT64("max_unmap_size", SCSIDiskState, max_unmap_size, 3210 DEFAULT_MAX_UNMAP_SIZE), 3211 DEFINE_PROP_UINT64("max_io_size", SCSIDiskState, max_io_size, 3212 DEFAULT_MAX_IO_SIZE), 3213 DEFINE_PROP_INT32("scsi_version", SCSIDiskState, qdev.default_scsi_version, 3214 -1), 3215 DEFINE_PROP_UINT32("io_timeout", SCSIDiskState, qdev.io_timeout, 3216 DEFAULT_IO_TIMEOUT), 3217 DEFINE_PROP_END_OF_LIST(), 3218 }; 3219 3220 static void scsi_block_class_initfn(ObjectClass *klass, void *data) 3221 { 3222 DeviceClass *dc = DEVICE_CLASS(klass); 3223 SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass); 3224 SCSIDiskClass *sdc = SCSI_DISK_BASE_CLASS(klass); 3225 3226 sc->realize = scsi_block_realize; 3227 sc->alloc_req = scsi_block_new_request; 3228 sc->parse_cdb = scsi_block_parse_cdb; 3229 sdc->dma_readv = scsi_block_dma_readv; 3230 sdc->dma_writev = scsi_block_dma_writev; 3231 sdc->update_sense = scsi_block_update_sense; 3232 sdc->need_fua_emulation = scsi_block_no_fua; 3233 dc->desc = "SCSI block device passthrough"; 3234 device_class_set_props(dc, scsi_block_properties); 3235 dc->vmsd = &vmstate_scsi_disk_state; 3236 } 3237 3238 static const TypeInfo scsi_block_info = { 3239 .name = "scsi-block", 3240 .parent = TYPE_SCSI_DISK_BASE, 3241 .class_init = scsi_block_class_initfn, 3242 }; 3243 #endif 3244 3245 static void scsi_disk_register_types(void) 3246 { 3247 type_register_static(&scsi_disk_base_info); 3248 type_register_static(&scsi_hd_info); 3249 type_register_static(&scsi_cd_info); 3250 #ifdef __linux__ 3251 type_register_static(&scsi_block_info); 3252 #endif 3253 } 3254 3255 type_init(scsi_disk_register_types) 3256