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util: move declarations out of qemu-common.h
[qemu/ar7.git] / hw / scsi / scsi-disk.c
blobc3ce54a203a8fc1c25d58e605a7561eac5453537
1 /*
2 * SCSI Device emulation
3 *
4 * Copyright (c) 2006 CodeSourcery.
5 * Based on code by Fabrice Bellard
6 *
7 * Written by Paul Brook
8 * Modifications:
9 * 2009-Dec-12 Artyom Tarasenko : implemented stamdard inquiry for the case
10 * when the allocation length of CDB is smaller
11 * than 36.
12 * 2009-Oct-13 Artyom Tarasenko : implemented the block descriptor in the
13 * MODE SENSE response.
14 *
15 * This code is licensed under the LGPL.
16 *
17 * Note that this file only handles the SCSI architecture model and device
18 * commands. Emulation of interface/link layer protocols is handled by
19 * the host adapter emulator.
20 */
21
22 //#define DEBUG_SCSI
23
24 #ifdef DEBUG_SCSI
25 #define DPRINTF(fmt, ...) \
26 do { printf("scsi-disk: " fmt , ## __VA_ARGS__); } while (0)
27 #else
28 #define DPRINTF(fmt, ...) do {} while(0)
29 #endif
30
31 #include "qemu/osdep.h"
32 #include "qapi/error.h"
33 #include "qemu/error-report.h"
34 #include "hw/scsi/scsi.h"
35 #include "block/scsi.h"
36 #include "sysemu/sysemu.h"
37 #include "sysemu/block-backend.h"
38 #include "sysemu/blockdev.h"
39 #include "hw/block/block.h"
40 #include "sysemu/dma.h"
41 #include "qemu/cutils.h"
42
43 #ifdef __linux
44 #include <scsi/sg.h>
45 #endif
46
47 #define SCSI_WRITE_SAME_MAX 524288
48 #define SCSI_DMA_BUF_SIZE 131072
49 #define SCSI_MAX_INQUIRY_LEN 256
50 #define SCSI_MAX_MODE_LEN 256
51
52 #define DEFAULT_DISCARD_GRANULARITY 4096
53 #define DEFAULT_MAX_UNMAP_SIZE (1 << 30) /* 1 GB */
54 #define DEFAULT_MAX_IO_SIZE INT_MAX /* 2 GB - 1 block */
55
56 typedef struct SCSIDiskState SCSIDiskState;
57
58 typedef struct SCSIDiskReq {
59 SCSIRequest req;
60 /* Both sector and sector_count are in terms of qemu 512 byte blocks. */
61 uint64_t sector;
62 uint32_t sector_count;
63 uint32_t buflen;
64 bool started;
65 struct iovec iov;
66 QEMUIOVector qiov;
67 BlockAcctCookie acct;
68 } SCSIDiskReq;
69
70 #define SCSI_DISK_F_REMOVABLE 0
71 #define SCSI_DISK_F_DPOFUA 1
72 #define SCSI_DISK_F_NO_REMOVABLE_DEVOPS 2
73
74 struct SCSIDiskState
75 {
76 SCSIDevice qdev;
77 uint32_t features;
78 bool media_changed;
79 bool media_event;
80 bool eject_request;
81 uint16_t port_index;
82 uint64_t max_unmap_size;
83 uint64_t max_io_size;
84 QEMUBH *bh;
85 char *version;
86 char *serial;
87 char *vendor;
88 char *product;
89 bool tray_open;
90 bool tray_locked;
91 };
92
93 static int scsi_handle_rw_error(SCSIDiskReq *r, int error, bool acct_failed);
94
95 static void scsi_free_request(SCSIRequest *req)
96 {
97 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
98
99 qemu_vfree(r->iov.iov_base);
100 }
101
102 /* Helper function for command completion with sense. */
103 static void scsi_check_condition(SCSIDiskReq *r, SCSISense sense)
104 {
105 DPRINTF("Command complete tag=0x%x sense=%d/%d/%d\n",
106 r->req.tag, sense.key, sense.asc, sense.ascq);
107 scsi_req_build_sense(&r->req, sense);
108 scsi_req_complete(&r->req, CHECK_CONDITION);
109 }
110
111 static uint32_t scsi_init_iovec(SCSIDiskReq *r, size_t size)
112 {
113 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
114
115 if (!r->iov.iov_base) {
116 r->buflen = size;
117 r->iov.iov_base = blk_blockalign(s->qdev.conf.blk, r->buflen);
118 }
119 r->iov.iov_len = MIN(r->sector_count * 512, r->buflen);
120 qemu_iovec_init_external(&r->qiov, &r->iov, 1);
121 return r->qiov.size / 512;
122 }
123
124 static void scsi_disk_save_request(QEMUFile *f, SCSIRequest *req)
125 {
126 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
127
128 qemu_put_be64s(f, &r->sector);
129 qemu_put_be32s(f, &r->sector_count);
130 qemu_put_be32s(f, &r->buflen);
131 if (r->buflen) {
132 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
133 qemu_put_buffer(f, r->iov.iov_base, r->iov.iov_len);
134 } else if (!req->retry) {
135 uint32_t len = r->iov.iov_len;
136 qemu_put_be32s(f, &len);
137 qemu_put_buffer(f, r->iov.iov_base, r->iov.iov_len);
138 }
139 }
140 }
141
142 static void scsi_disk_load_request(QEMUFile *f, SCSIRequest *req)
143 {
144 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
145
146 qemu_get_be64s(f, &r->sector);
147 qemu_get_be32s(f, &r->sector_count);
148 qemu_get_be32s(f, &r->buflen);
149 if (r->buflen) {
150 scsi_init_iovec(r, r->buflen);
151 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
152 qemu_get_buffer(f, r->iov.iov_base, r->iov.iov_len);
153 } else if (!r->req.retry) {
154 uint32_t len;
155 qemu_get_be32s(f, &len);
156 r->iov.iov_len = len;
157 assert(r->iov.iov_len <= r->buflen);
158 qemu_get_buffer(f, r->iov.iov_base, r->iov.iov_len);
159 }
160 }
161
162 qemu_iovec_init_external(&r->qiov, &r->iov, 1);
163 }
164
165 static void scsi_aio_complete(void *opaque, int ret)
166 {
167 SCSIDiskReq *r = (SCSIDiskReq *)opaque;
168 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
169
170 assert(r->req.aiocb != NULL);
171 r->req.aiocb = NULL;
172 if (r->req.io_canceled) {
173 scsi_req_cancel_complete(&r->req);
174 goto done;
175 }
176
177 if (ret < 0) {
178 if (scsi_handle_rw_error(r, -ret, true)) {
179 goto done;
180 }
181 }
182
183 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct);
184 scsi_req_complete(&r->req, GOOD);
185
186 done:
187 scsi_req_unref(&r->req);
188 }
189
190 static bool scsi_is_cmd_fua(SCSICommand *cmd)
191 {
192 switch (cmd->buf[0]) {
193 case READ_10:
194 case READ_12:
195 case READ_16:
196 case WRITE_10:
197 case WRITE_12:
198 case WRITE_16:
199 return (cmd->buf[1] & 8) != 0;
200
201 case VERIFY_10:
202 case VERIFY_12:
203 case VERIFY_16:
204 case WRITE_VERIFY_10:
205 case WRITE_VERIFY_12:
206 case WRITE_VERIFY_16:
207 return true;
208
209 case READ_6:
210 case WRITE_6:
211 default:
212 return false;
213 }
214 }
215
216 static void scsi_write_do_fua(SCSIDiskReq *r)
217 {
218 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
219
220 assert(r->req.aiocb == NULL);
221
222 if (r->req.io_canceled) {
223 scsi_req_cancel_complete(&r->req);
224 goto done;
225 }
226
227 if (scsi_is_cmd_fua(&r->req.cmd)) {
228 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 0,
229 BLOCK_ACCT_FLUSH);
230 r->req.aiocb = blk_aio_flush(s->qdev.conf.blk, scsi_aio_complete, r);
231 return;
232 }
233
234 scsi_req_complete(&r->req, GOOD);
235
236 done:
237 scsi_req_unref(&r->req);
238 }
239
240 static void scsi_dma_complete_noio(SCSIDiskReq *r, int ret)
241 {
242 assert(r->req.aiocb == NULL);
243
244 if (r->req.io_canceled) {
245 scsi_req_cancel_complete(&r->req);
246 goto done;
247 }
248
249 if (ret < 0) {
250 if (scsi_handle_rw_error(r, -ret, false)) {
251 goto done;
252 }
253 }
254
255 r->sector += r->sector_count;
256 r->sector_count = 0;
257 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
258 scsi_write_do_fua(r);
259 return;
260 } else {
261 scsi_req_complete(&r->req, GOOD);
262 }
263
264 done:
265 scsi_req_unref(&r->req);
266 }
267
268 static void scsi_dma_complete(void *opaque, int ret)
269 {
270 SCSIDiskReq *r = (SCSIDiskReq *)opaque;
271 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
272
273 assert(r->req.aiocb != NULL);
274 r->req.aiocb = NULL;
275
276 if (ret < 0) {
277 block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct);
278 } else {
279 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct);
280 }
281 scsi_dma_complete_noio(r, ret);
282 }
283
284 static void scsi_read_complete(void * opaque, int ret)
285 {
286 SCSIDiskReq *r = (SCSIDiskReq *)opaque;
287 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
288 int n;
289
290 assert(r->req.aiocb != NULL);
291 r->req.aiocb = NULL;
292 if (r->req.io_canceled) {
293 scsi_req_cancel_complete(&r->req);
294 goto done;
295 }
296
297 if (ret < 0) {
298 if (scsi_handle_rw_error(r, -ret, true)) {
299 goto done;
300 }
301 }
302
303 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct);
304 DPRINTF("Data ready tag=0x%x len=%zd\n", r->req.tag, r->qiov.size);
305
306 n = r->qiov.size / 512;
307 r->sector += n;
308 r->sector_count -= n;
309 scsi_req_data(&r->req, r->qiov.size);
310
311 done:
312 scsi_req_unref(&r->req);
313 }
314
315 /* Actually issue a read to the block device. */
316 static void scsi_do_read(SCSIDiskReq *r, int ret)
317 {
318 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
319 uint32_t n;
320
321 assert (r->req.aiocb == NULL);
322
323 if (r->req.io_canceled) {
324 scsi_req_cancel_complete(&r->req);
325 goto done;
326 }
327
328 if (ret < 0) {
329 if (scsi_handle_rw_error(r, -ret, false)) {
330 goto done;
331 }
332 }
333
334 /* The request is used as the AIO opaque value, so add a ref. */
335 scsi_req_ref(&r->req);
336
337 if (r->req.sg) {
338 dma_acct_start(s->qdev.conf.blk, &r->acct, r->req.sg, BLOCK_ACCT_READ);
339 r->req.resid -= r->req.sg->size;
340 r->req.aiocb = dma_blk_read(s->qdev.conf.blk, r->req.sg, r->sector,
341 scsi_dma_complete, r);
342 } else {
343 n = scsi_init_iovec(r, SCSI_DMA_BUF_SIZE);
344 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct,
345 n * BDRV_SECTOR_SIZE, BLOCK_ACCT_READ);
346 r->req.aiocb = blk_aio_readv(s->qdev.conf.blk, r->sector, &r->qiov, n,
347 scsi_read_complete, r);
348 }
349
350 done:
351 scsi_req_unref(&r->req);
352 }
353
354 static void scsi_do_read_cb(void *opaque, int ret)
355 {
356 SCSIDiskReq *r = (SCSIDiskReq *)opaque;
357 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
358
359 assert (r->req.aiocb != NULL);
360 r->req.aiocb = NULL;
361
362 if (ret < 0) {
363 block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct);
364 } else {
365 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct);
366 }
367 scsi_do_read(opaque, ret);
368 }
369
370 /* Read more data from scsi device into buffer. */
371 static void scsi_read_data(SCSIRequest *req)
372 {
373 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
374 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
375 bool first;
376
377 DPRINTF("Read sector_count=%d\n", r->sector_count);
378 if (r->sector_count == 0) {
379 /* This also clears the sense buffer for REQUEST SENSE. */
380 scsi_req_complete(&r->req, GOOD);
381 return;
382 }
383
384 /* No data transfer may already be in progress */
385 assert(r->req.aiocb == NULL);
386
387 /* The request is used as the AIO opaque value, so add a ref. */
388 scsi_req_ref(&r->req);
389 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
390 DPRINTF("Data transfer direction invalid\n");
391 scsi_read_complete(r, -EINVAL);
392 return;
393 }
394
395 if (s->tray_open) {
396 scsi_read_complete(r, -ENOMEDIUM);
397 return;
398 }
399
400 first = !r->started;
401 r->started = true;
402 if (first && scsi_is_cmd_fua(&r->req.cmd)) {
403 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 0,
404 BLOCK_ACCT_FLUSH);
405 r->req.aiocb = blk_aio_flush(s->qdev.conf.blk, scsi_do_read_cb, r);
406 } else {
407 scsi_do_read(r, 0);
408 }
409 }
410
411 /*
412 * scsi_handle_rw_error has two return values. 0 means that the error
413 * must be ignored, 1 means that the error has been processed and the
414 * caller should not do anything else for this request. Note that
415 * scsi_handle_rw_error always manages its reference counts, independent
416 * of the return value.
417 */
418 static int scsi_handle_rw_error(SCSIDiskReq *r, int error, bool acct_failed)
419 {
420 bool is_read = (r->req.cmd.mode == SCSI_XFER_FROM_DEV);
421 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
422 BlockErrorAction action = blk_get_error_action(s->qdev.conf.blk,
423 is_read, error);
424
425 if (action == BLOCK_ERROR_ACTION_REPORT) {
426 if (acct_failed) {
427 block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct);
428 }
429 switch (error) {
430 case ENOMEDIUM:
431 scsi_check_condition(r, SENSE_CODE(NO_MEDIUM));
432 break;
433 case ENOMEM:
434 scsi_check_condition(r, SENSE_CODE(TARGET_FAILURE));
435 break;
436 case EINVAL:
437 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
438 break;
439 case ENOSPC:
440 scsi_check_condition(r, SENSE_CODE(SPACE_ALLOC_FAILED));
441 break;
442 default:
443 scsi_check_condition(r, SENSE_CODE(IO_ERROR));
444 break;
445 }
446 }
447 blk_error_action(s->qdev.conf.blk, action, is_read, error);
448 if (action == BLOCK_ERROR_ACTION_STOP) {
449 scsi_req_retry(&r->req);
450 }
451 return action != BLOCK_ERROR_ACTION_IGNORE;
452 }
453
454 static void scsi_write_complete_noio(SCSIDiskReq *r, int ret)
455 {
456 uint32_t n;
457
458 assert (r->req.aiocb == NULL);
459
460 if (r->req.io_canceled) {
461 scsi_req_cancel_complete(&r->req);
462 goto done;
463 }
464
465 if (ret < 0) {
466 if (scsi_handle_rw_error(r, -ret, false)) {
467 goto done;
468 }
469 }
470
471 n = r->qiov.size / 512;
472 r->sector += n;
473 r->sector_count -= n;
474 if (r->sector_count == 0) {
475 scsi_write_do_fua(r);
476 return;
477 } else {
478 scsi_init_iovec(r, SCSI_DMA_BUF_SIZE);
479 DPRINTF("Write complete tag=0x%x more=%zd\n", r->req.tag, r->qiov.size);
480 scsi_req_data(&r->req, r->qiov.size);
481 }
482
483 done:
484 scsi_req_unref(&r->req);
485 }
486
487 static void scsi_write_complete(void * opaque, int ret)
488 {
489 SCSIDiskReq *r = (SCSIDiskReq *)opaque;
490 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
491
492 assert (r->req.aiocb != NULL);
493 r->req.aiocb = NULL;
494
495 if (ret < 0) {
496 block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct);
497 } else {
498 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct);
499 }
500 scsi_write_complete_noio(r, ret);
501 }
502
503 static void scsi_write_data(SCSIRequest *req)
504 {
505 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
506 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
507 uint32_t n;
508
509 /* No data transfer may already be in progress */
510 assert(r->req.aiocb == NULL);
511
512 /* The request is used as the AIO opaque value, so add a ref. */
513 scsi_req_ref(&r->req);
514 if (r->req.cmd.mode != SCSI_XFER_TO_DEV) {
515 DPRINTF("Data transfer direction invalid\n");
516 scsi_write_complete_noio(r, -EINVAL);
517 return;
518 }
519
520 if (!r->req.sg && !r->qiov.size) {
521 /* Called for the first time. Ask the driver to send us more data. */
522 r->started = true;
523 scsi_write_complete_noio(r, 0);
524 return;
525 }
526 if (s->tray_open) {
527 scsi_write_complete_noio(r, -ENOMEDIUM);
528 return;
529 }
530
531 if (r->req.cmd.buf[0] == VERIFY_10 || r->req.cmd.buf[0] == VERIFY_12 ||
532 r->req.cmd.buf[0] == VERIFY_16) {
533 if (r->req.sg) {
534 scsi_dma_complete_noio(r, 0);
535 } else {
536 scsi_write_complete_noio(r, 0);
537 }
538 return;
539 }
540
541 if (r->req.sg) {
542 dma_acct_start(s->qdev.conf.blk, &r->acct, r->req.sg, BLOCK_ACCT_WRITE);
543 r->req.resid -= r->req.sg->size;
544 r->req.aiocb = dma_blk_write(s->qdev.conf.blk, r->req.sg, r->sector,
545 scsi_dma_complete, r);
546 } else {
547 n = r->qiov.size / 512;
548 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct,
549 n * BDRV_SECTOR_SIZE, BLOCK_ACCT_WRITE);
550 r->req.aiocb = blk_aio_writev(s->qdev.conf.blk, r->sector, &r->qiov, n,
551 scsi_write_complete, r);
552 }
553 }
554
555 /* Return a pointer to the data buffer. */
556 static uint8_t *scsi_get_buf(SCSIRequest *req)
557 {
558 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
559
560 return (uint8_t *)r->iov.iov_base;
561 }
562
563 static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf)
564 {
565 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
566 int buflen = 0;
567 int start;
568
569 if (req->cmd.buf[1] & 0x1) {
570 /* Vital product data */
571 uint8_t page_code = req->cmd.buf[2];
572
573 outbuf[buflen++] = s->qdev.type & 0x1f;
574 outbuf[buflen++] = page_code ; // this page
575 outbuf[buflen++] = 0x00;
576 outbuf[buflen++] = 0x00;
577 start = buflen;
578
579 switch (page_code) {
580 case 0x00: /* Supported page codes, mandatory */
581 {
582 DPRINTF("Inquiry EVPD[Supported pages] "
583 "buffer size %zd\n", req->cmd.xfer);
584 outbuf[buflen++] = 0x00; // list of supported pages (this page)
585 if (s->serial) {
586 outbuf[buflen++] = 0x80; // unit serial number
587 }
588 outbuf[buflen++] = 0x83; // device identification
589 if (s->qdev.type == TYPE_DISK) {
590 outbuf[buflen++] = 0xb0; // block limits
591 outbuf[buflen++] = 0xb2; // thin provisioning
592 }
593 break;
594 }
595 case 0x80: /* Device serial number, optional */
596 {
597 int l;
598
599 if (!s->serial) {
600 DPRINTF("Inquiry (EVPD[Serial number] not supported\n");
601 return -1;
602 }
603
604 l = strlen(s->serial);
605 if (l > 20) {
606 l = 20;
607 }
608
609 DPRINTF("Inquiry EVPD[Serial number] "
610 "buffer size %zd\n", req->cmd.xfer);
611 memcpy(outbuf+buflen, s->serial, l);
612 buflen += l;
613 break;
614 }
615
616 case 0x83: /* Device identification page, mandatory */
617 {
618 const char *str = s->serial ?: blk_name(s->qdev.conf.blk);
619 int max_len = s->serial ? 20 : 255 - 8;
620 int id_len = strlen(str);
621
622 if (id_len > max_len) {
623 id_len = max_len;
624 }
625 DPRINTF("Inquiry EVPD[Device identification] "
626 "buffer size %zd\n", req->cmd.xfer);
627
628 outbuf[buflen++] = 0x2; // ASCII
629 outbuf[buflen++] = 0; // not officially assigned
630 outbuf[buflen++] = 0; // reserved
631 outbuf[buflen++] = id_len; // length of data following
632 memcpy(outbuf+buflen, str, id_len);
633 buflen += id_len;
634
635 if (s->qdev.wwn) {
636 outbuf[buflen++] = 0x1; // Binary
637 outbuf[buflen++] = 0x3; // NAA
638 outbuf[buflen++] = 0; // reserved
639 outbuf[buflen++] = 8;
640 stq_be_p(&outbuf[buflen], s->qdev.wwn);
641 buflen += 8;
642 }
643
644 if (s->qdev.port_wwn) {
645 outbuf[buflen++] = 0x61; // SAS / Binary
646 outbuf[buflen++] = 0x93; // PIV / Target port / NAA
647 outbuf[buflen++] = 0; // reserved
648 outbuf[buflen++] = 8;
649 stq_be_p(&outbuf[buflen], s->qdev.port_wwn);
650 buflen += 8;
651 }
652
653 if (s->port_index) {
654 outbuf[buflen++] = 0x61; // SAS / Binary
655 outbuf[buflen++] = 0x94; // PIV / Target port / relative target port
656 outbuf[buflen++] = 0; // reserved
657 outbuf[buflen++] = 4;
658 stw_be_p(&outbuf[buflen + 2], s->port_index);
659 buflen += 4;
660 }
661 break;
662 }
663 case 0xb0: /* block limits */
664 {
665 unsigned int unmap_sectors =
666 s->qdev.conf.discard_granularity / s->qdev.blocksize;
667 unsigned int min_io_size =
668 s->qdev.conf.min_io_size / s->qdev.blocksize;
669 unsigned int opt_io_size =
670 s->qdev.conf.opt_io_size / s->qdev.blocksize;
671 unsigned int max_unmap_sectors =
672 s->max_unmap_size / s->qdev.blocksize;
673 unsigned int max_io_sectors =
674 s->max_io_size / s->qdev.blocksize;
675
676 if (s->qdev.type == TYPE_ROM) {
677 DPRINTF("Inquiry (EVPD[%02X] not supported for CDROM\n",
678 page_code);
679 return -1;
680 }
681 /* required VPD size with unmap support */
682 buflen = 0x40;
683 memset(outbuf + 4, 0, buflen - 4);
684
685 outbuf[4] = 0x1; /* wsnz */
686
687 /* optimal transfer length granularity */
688 outbuf[6] = (min_io_size >> 8) & 0xff;
689 outbuf[7] = min_io_size & 0xff;
690
691 /* maximum transfer length */
692 outbuf[8] = (max_io_sectors >> 24) & 0xff;
693 outbuf[9] = (max_io_sectors >> 16) & 0xff;
694 outbuf[10] = (max_io_sectors >> 8) & 0xff;
695 outbuf[11] = max_io_sectors & 0xff;
696
697 /* optimal transfer length */
698 outbuf[12] = (opt_io_size >> 24) & 0xff;
699 outbuf[13] = (opt_io_size >> 16) & 0xff;
700 outbuf[14] = (opt_io_size >> 8) & 0xff;
701 outbuf[15] = opt_io_size & 0xff;
702
703 /* max unmap LBA count, default is 1GB */
704 outbuf[20] = (max_unmap_sectors >> 24) & 0xff;
705 outbuf[21] = (max_unmap_sectors >> 16) & 0xff;
706 outbuf[22] = (max_unmap_sectors >> 8) & 0xff;
707 outbuf[23] = max_unmap_sectors & 0xff;
708
709 /* max unmap descriptors, 255 fit in 4 kb with an 8-byte header. */
710 outbuf[24] = 0;
711 outbuf[25] = 0;
712 outbuf[26] = 0;
713 outbuf[27] = 255;
714
715 /* optimal unmap granularity */
716 outbuf[28] = (unmap_sectors >> 24) & 0xff;
717 outbuf[29] = (unmap_sectors >> 16) & 0xff;
718 outbuf[30] = (unmap_sectors >> 8) & 0xff;
719 outbuf[31] = unmap_sectors & 0xff;
720
721 /* max write same size */
722 outbuf[36] = 0;
723 outbuf[37] = 0;
724 outbuf[38] = 0;
725 outbuf[39] = 0;
726
727 outbuf[40] = (max_io_sectors >> 24) & 0xff;
728 outbuf[41] = (max_io_sectors >> 16) & 0xff;
729 outbuf[42] = (max_io_sectors >> 8) & 0xff;
730 outbuf[43] = max_io_sectors & 0xff;
731 break;
732 }
733 case 0xb2: /* thin provisioning */
734 {
735 buflen = 8;
736 outbuf[4] = 0;
737 outbuf[5] = 0xe0; /* unmap & write_same 10/16 all supported */
738 outbuf[6] = s->qdev.conf.discard_granularity ? 2 : 1;
739 outbuf[7] = 0;
740 break;
741 }
742 default:
743 return -1;
744 }
745 /* done with EVPD */
746 assert(buflen - start <= 255);
747 outbuf[start - 1] = buflen - start;
748 return buflen;
749 }
750
751 /* Standard INQUIRY data */
752 if (req->cmd.buf[2] != 0) {
753 return -1;
754 }
755
756 /* PAGE CODE == 0 */
757 buflen = req->cmd.xfer;
758 if (buflen > SCSI_MAX_INQUIRY_LEN) {
759 buflen = SCSI_MAX_INQUIRY_LEN;
760 }
761
762 outbuf[0] = s->qdev.type & 0x1f;
763 outbuf[1] = (s->features & (1 << SCSI_DISK_F_REMOVABLE)) ? 0x80 : 0;
764
765 strpadcpy((char *) &outbuf[16], 16, s->product, ' ');
766 strpadcpy((char *) &outbuf[8], 8, s->vendor, ' ');
767
768 memset(&outbuf[32], 0, 4);
769 memcpy(&outbuf[32], s->version, MIN(4, strlen(s->version)));
770 /*
771 * We claim conformance to SPC-3, which is required for guests
772 * to ask for modern features like READ CAPACITY(16) or the
773 * block characteristics VPD page by default. Not all of SPC-3
774 * is actually implemented, but we're good enough.
775 */
776 outbuf[2] = 5;
777 outbuf[3] = 2 | 0x10; /* Format 2, HiSup */
778
779 if (buflen > 36) {
780 outbuf[4] = buflen - 5; /* Additional Length = (Len - 1) - 4 */
781 } else {
782 /* If the allocation length of CDB is too small,
783 the additional length is not adjusted */
784 outbuf[4] = 36 - 5;
785 }
786
787 /* Sync data transfer and TCQ. */
788 outbuf[7] = 0x10 | (req->bus->info->tcq ? 0x02 : 0);
789 return buflen;
790 }
791
792 static inline bool media_is_dvd(SCSIDiskState *s)
793 {
794 uint64_t nb_sectors;
795 if (s->qdev.type != TYPE_ROM) {
796 return false;
797 }
798 if (!blk_is_inserted(s->qdev.conf.blk)) {
799 return false;
800 }
801 if (s->tray_open) {
802 return false;
803 }
804 blk_get_geometry(s->qdev.conf.blk, &nb_sectors);
805 return nb_sectors > CD_MAX_SECTORS;
806 }
807
808 static inline bool media_is_cd(SCSIDiskState *s)
809 {
810 uint64_t nb_sectors;
811 if (s->qdev.type != TYPE_ROM) {
812 return false;
813 }
814 if (!blk_is_inserted(s->qdev.conf.blk)) {
815 return false;
816 }
817 if (s->tray_open) {
818 return false;
819 }
820 blk_get_geometry(s->qdev.conf.blk, &nb_sectors);
821 return nb_sectors <= CD_MAX_SECTORS;
822 }
823
824 static int scsi_read_disc_information(SCSIDiskState *s, SCSIDiskReq *r,
825 uint8_t *outbuf)
826 {
827 uint8_t type = r->req.cmd.buf[1] & 7;
828
829 if (s->qdev.type != TYPE_ROM) {
830 return -1;
831 }
832
833 /* Types 1/2 are only defined for Blu-Ray. */
834 if (type != 0) {
835 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
836 return -1;
837 }
838
839 memset(outbuf, 0, 34);
840 outbuf[1] = 32;
841 outbuf[2] = 0xe; /* last session complete, disc finalized */
842 outbuf[3] = 1; /* first track on disc */
843 outbuf[4] = 1; /* # of sessions */
844 outbuf[5] = 1; /* first track of last session */
845 outbuf[6] = 1; /* last track of last session */
846 outbuf[7] = 0x20; /* unrestricted use */
847 outbuf[8] = 0x00; /* CD-ROM or DVD-ROM */
848 /* 9-10-11: most significant byte corresponding bytes 4-5-6 */
849 /* 12-23: not meaningful for CD-ROM or DVD-ROM */
850 /* 24-31: disc bar code */
851 /* 32: disc application code */
852 /* 33: number of OPC tables */
853
854 return 34;
855 }
856
857 static int scsi_read_dvd_structure(SCSIDiskState *s, SCSIDiskReq *r,
858 uint8_t *outbuf)
859 {
860 static const int rds_caps_size[5] = {
861 [0] = 2048 + 4,
862 [1] = 4 + 4,
863 [3] = 188 + 4,
864 [4] = 2048 + 4,
865 };
866
867 uint8_t media = r->req.cmd.buf[1];
868 uint8_t layer = r->req.cmd.buf[6];
869 uint8_t format = r->req.cmd.buf[7];
870 int size = -1;
871
872 if (s->qdev.type != TYPE_ROM) {
873 return -1;
874 }
875 if (media != 0) {
876 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
877 return -1;
878 }
879
880 if (format != 0xff) {
881 if (s->tray_open || !blk_is_inserted(s->qdev.conf.blk)) {
882 scsi_check_condition(r, SENSE_CODE(NO_MEDIUM));
883 return -1;
884 }
885 if (media_is_cd(s)) {
886 scsi_check_condition(r, SENSE_CODE(INCOMPATIBLE_FORMAT));
887 return -1;
888 }
889 if (format >= ARRAY_SIZE(rds_caps_size)) {
890 return -1;
891 }
892 size = rds_caps_size[format];
893 memset(outbuf, 0, size);
894 }
895
896 switch (format) {
897 case 0x00: {
898 /* Physical format information */
899 uint64_t nb_sectors;
900 if (layer != 0) {
901 goto fail;
902 }
903 blk_get_geometry(s->qdev.conf.blk, &nb_sectors);
904
905 outbuf[4] = 1; /* DVD-ROM, part version 1 */
906 outbuf[5] = 0xf; /* 120mm disc, minimum rate unspecified */
907 outbuf[6] = 1; /* one layer, read-only (per MMC-2 spec) */
908 outbuf[7] = 0; /* default densities */
909
910 stl_be_p(&outbuf[12], (nb_sectors >> 2) - 1); /* end sector */
911 stl_be_p(&outbuf[16], (nb_sectors >> 2) - 1); /* l0 end sector */
912 break;
913 }
914
915 case 0x01: /* DVD copyright information, all zeros */
916 break;
917
918 case 0x03: /* BCA information - invalid field for no BCA info */
919 return -1;
920
921 case 0x04: /* DVD disc manufacturing information, all zeros */
922 break;
923
924 case 0xff: { /* List capabilities */
925 int i;
926 size = 4;
927 for (i = 0; i < ARRAY_SIZE(rds_caps_size); i++) {
928 if (!rds_caps_size[i]) {
929 continue;
930 }
931 outbuf[size] = i;
932 outbuf[size + 1] = 0x40; /* Not writable, readable */
933 stw_be_p(&outbuf[size + 2], rds_caps_size[i]);
934 size += 4;
935 }
936 break;
937 }
938
939 default:
940 return -1;
941 }
942
943 /* Size of buffer, not including 2 byte size field */
944 stw_be_p(outbuf, size - 2);
945 return size;
946
947 fail:
948 return -1;
949 }
950
951 static int scsi_event_status_media(SCSIDiskState *s, uint8_t *outbuf)
952 {
953 uint8_t event_code, media_status;
954
955 media_status = 0;
956 if (s->tray_open) {
957 media_status = MS_TRAY_OPEN;
958 } else if (blk_is_inserted(s->qdev.conf.blk)) {
959 media_status = MS_MEDIA_PRESENT;
960 }
961
962 /* Event notification descriptor */
963 event_code = MEC_NO_CHANGE;
964 if (media_status != MS_TRAY_OPEN) {
965 if (s->media_event) {
966 event_code = MEC_NEW_MEDIA;
967 s->media_event = false;
968 } else if (s->eject_request) {
969 event_code = MEC_EJECT_REQUESTED;
970 s->eject_request = false;
971 }
972 }
973
974 outbuf[0] = event_code;
975 outbuf[1] = media_status;
976
977 /* These fields are reserved, just clear them. */
978 outbuf[2] = 0;
979 outbuf[3] = 0;
980 return 4;
981 }
982
983 static int scsi_get_event_status_notification(SCSIDiskState *s, SCSIDiskReq *r,
984 uint8_t *outbuf)
985 {
986 int size;
987 uint8_t *buf = r->req.cmd.buf;
988 uint8_t notification_class_request = buf[4];
989 if (s->qdev.type != TYPE_ROM) {
990 return -1;
991 }
992 if ((buf[1] & 1) == 0) {
993 /* asynchronous */
994 return -1;
995 }
996
997 size = 4;
998 outbuf[0] = outbuf[1] = 0;
999 outbuf[3] = 1 << GESN_MEDIA; /* supported events */
1000 if (notification_class_request & (1 << GESN_MEDIA)) {
1001 outbuf[2] = GESN_MEDIA;
1002 size += scsi_event_status_media(s, &outbuf[size]);
1003 } else {
1004 outbuf[2] = 0x80;
1005 }
1006 stw_be_p(outbuf, size - 4);
1007 return size;
1008 }
1009
1010 static int scsi_get_configuration(SCSIDiskState *s, uint8_t *outbuf)
1011 {
1012 int current;
1013
1014 if (s->qdev.type != TYPE_ROM) {
1015 return -1;
1016 }
1017
1018 if (media_is_dvd(s)) {
1019 current = MMC_PROFILE_DVD_ROM;
1020 } else if (media_is_cd(s)) {
1021 current = MMC_PROFILE_CD_ROM;
1022 } else {
1023 current = MMC_PROFILE_NONE;
1024 }
1025
1026 memset(outbuf, 0, 40);
1027 stl_be_p(&outbuf[0], 36); /* Bytes after the data length field */
1028 stw_be_p(&outbuf[6], current);
1029 /* outbuf[8] - outbuf[19]: Feature 0 - Profile list */
1030 outbuf[10] = 0x03; /* persistent, current */
1031 outbuf[11] = 8; /* two profiles */
1032 stw_be_p(&outbuf[12], MMC_PROFILE_DVD_ROM);
1033 outbuf[14] = (current == MMC_PROFILE_DVD_ROM);
1034 stw_be_p(&outbuf[16], MMC_PROFILE_CD_ROM);
1035 outbuf[18] = (current == MMC_PROFILE_CD_ROM);
1036 /* outbuf[20] - outbuf[31]: Feature 1 - Core feature */
1037 stw_be_p(&outbuf[20], 1);
1038 outbuf[22] = 0x08 | 0x03; /* version 2, persistent, current */
1039 outbuf[23] = 8;
1040 stl_be_p(&outbuf[24], 1); /* SCSI */
1041 outbuf[28] = 1; /* DBE = 1, mandatory */
1042 /* outbuf[32] - outbuf[39]: Feature 3 - Removable media feature */
1043 stw_be_p(&outbuf[32], 3);
1044 outbuf[34] = 0x08 | 0x03; /* version 2, persistent, current */
1045 outbuf[35] = 4;
1046 outbuf[36] = 0x39; /* tray, load=1, eject=1, unlocked at powerup, lock=1 */
1047 /* TODO: Random readable, CD read, DVD read, drive serial number,
1048 power management */
1049 return 40;
1050 }
1051
1052 static int scsi_emulate_mechanism_status(SCSIDiskState *s, uint8_t *outbuf)
1053 {
1054 if (s->qdev.type != TYPE_ROM) {
1055 return -1;
1056 }
1057 memset(outbuf, 0, 8);
1058 outbuf[5] = 1; /* CD-ROM */
1059 return 8;
1060 }
1061
1062 static int mode_sense_page(SCSIDiskState *s, int page, uint8_t **p_outbuf,
1063 int page_control)
1064 {
1065 static const int mode_sense_valid[0x3f] = {
1066 [MODE_PAGE_HD_GEOMETRY] = (1 << TYPE_DISK),
1067 [MODE_PAGE_FLEXIBLE_DISK_GEOMETRY] = (1 << TYPE_DISK),
1068 [MODE_PAGE_CACHING] = (1 << TYPE_DISK) | (1 << TYPE_ROM),
1069 [MODE_PAGE_R_W_ERROR] = (1 << TYPE_DISK) | (1 << TYPE_ROM),
1070 [MODE_PAGE_AUDIO_CTL] = (1 << TYPE_ROM),
1071 [MODE_PAGE_CAPABILITIES] = (1 << TYPE_ROM),
1072 };
1073
1074 uint8_t *p = *p_outbuf + 2;
1075 int length;
1076
1077 if ((mode_sense_valid[page] & (1 << s->qdev.type)) == 0) {
1078 return -1;
1079 }
1080
1081 /*
1082 * If Changeable Values are requested, a mask denoting those mode parameters
1083 * that are changeable shall be returned. As we currently don't support
1084 * parameter changes via MODE_SELECT all bits are returned set to zero.
1085 * The buffer was already menset to zero by the caller of this function.
1086 *
1087 * The offsets here are off by two compared to the descriptions in the
1088 * SCSI specs, because those include a 2-byte header. This is unfortunate,
1089 * but it is done so that offsets are consistent within our implementation
1090 * of MODE SENSE and MODE SELECT. MODE SELECT has to deal with both
1091 * 2-byte and 4-byte headers.
1092 */
1093 switch (page) {
1094 case MODE_PAGE_HD_GEOMETRY:
1095 length = 0x16;
1096 if (page_control == 1) { /* Changeable Values */
1097 break;
1098 }
1099 /* if a geometry hint is available, use it */
1100 p[0] = (s->qdev.conf.cyls >> 16) & 0xff;
1101 p[1] = (s->qdev.conf.cyls >> 8) & 0xff;
1102 p[2] = s->qdev.conf.cyls & 0xff;
1103 p[3] = s->qdev.conf.heads & 0xff;
1104 /* Write precomp start cylinder, disabled */
1105 p[4] = (s->qdev.conf.cyls >> 16) & 0xff;
1106 p[5] = (s->qdev.conf.cyls >> 8) & 0xff;
1107 p[6] = s->qdev.conf.cyls & 0xff;
1108 /* Reduced current start cylinder, disabled */
1109 p[7] = (s->qdev.conf.cyls >> 16) & 0xff;
1110 p[8] = (s->qdev.conf.cyls >> 8) & 0xff;
1111 p[9] = s->qdev.conf.cyls & 0xff;
1112 /* Device step rate [ns], 200ns */
1113 p[10] = 0;
1114 p[11] = 200;
1115 /* Landing zone cylinder */
1116 p[12] = 0xff;
1117 p[13] = 0xff;
1118 p[14] = 0xff;
1119 /* Medium rotation rate [rpm], 5400 rpm */
1120 p[18] = (5400 >> 8) & 0xff;
1121 p[19] = 5400 & 0xff;
1122 break;
1123
1124 case MODE_PAGE_FLEXIBLE_DISK_GEOMETRY:
1125 length = 0x1e;
1126 if (page_control == 1) { /* Changeable Values */
1127 break;
1128 }
1129 /* Transfer rate [kbit/s], 5Mbit/s */
1130 p[0] = 5000 >> 8;
1131 p[1] = 5000 & 0xff;
1132 /* if a geometry hint is available, use it */
1133 p[2] = s->qdev.conf.heads & 0xff;
1134 p[3] = s->qdev.conf.secs & 0xff;
1135 p[4] = s->qdev.blocksize >> 8;
1136 p[6] = (s->qdev.conf.cyls >> 8) & 0xff;
1137 p[7] = s->qdev.conf.cyls & 0xff;
1138 /* Write precomp start cylinder, disabled */
1139 p[8] = (s->qdev.conf.cyls >> 8) & 0xff;
1140 p[9] = s->qdev.conf.cyls & 0xff;
1141 /* Reduced current start cylinder, disabled */
1142 p[10] = (s->qdev.conf.cyls >> 8) & 0xff;
1143 p[11] = s->qdev.conf.cyls & 0xff;
1144 /* Device step rate [100us], 100us */
1145 p[12] = 0;
1146 p[13] = 1;
1147 /* Device step pulse width [us], 1us */
1148 p[14] = 1;
1149 /* Device head settle delay [100us], 100us */
1150 p[15] = 0;
1151 p[16] = 1;
1152 /* Motor on delay [0.1s], 0.1s */
1153 p[17] = 1;
1154 /* Motor off delay [0.1s], 0.1s */
1155 p[18] = 1;
1156 /* Medium rotation rate [rpm], 5400 rpm */
1157 p[26] = (5400 >> 8) & 0xff;
1158 p[27] = 5400 & 0xff;
1159 break;
1160
1161 case MODE_PAGE_CACHING:
1162 length = 0x12;
1163 if (page_control == 1 || /* Changeable Values */
1164 blk_enable_write_cache(s->qdev.conf.blk)) {
1165 p[0] = 4; /* WCE */
1166 }
1167 break;
1168
1169 case MODE_PAGE_R_W_ERROR:
1170 length = 10;
1171 if (page_control == 1) { /* Changeable Values */
1172 break;
1173 }
1174 p[0] = 0x80; /* Automatic Write Reallocation Enabled */
1175 if (s->qdev.type == TYPE_ROM) {
1176 p[1] = 0x20; /* Read Retry Count */
1177 }
1178 break;
1179
1180 case MODE_PAGE_AUDIO_CTL:
1181 length = 14;
1182 break;
1183
1184 case MODE_PAGE_CAPABILITIES:
1185 length = 0x14;
1186 if (page_control == 1) { /* Changeable Values */
1187 break;
1188 }
1189
1190 p[0] = 0x3b; /* CD-R & CD-RW read */
1191 p[1] = 0; /* Writing not supported */
1192 p[2] = 0x7f; /* Audio, composite, digital out,
1193 mode 2 form 1&2, multi session */
1194 p[3] = 0xff; /* CD DA, DA accurate, RW supported,
1195 RW corrected, C2 errors, ISRC,
1196 UPC, Bar code */
1197 p[4] = 0x2d | (s->tray_locked ? 2 : 0);
1198 /* Locking supported, jumper present, eject, tray */
1199 p[5] = 0; /* no volume & mute control, no
1200 changer */
1201 p[6] = (50 * 176) >> 8; /* 50x read speed */
1202 p[7] = (50 * 176) & 0xff;
1203 p[8] = 2 >> 8; /* Two volume levels */
1204 p[9] = 2 & 0xff;
1205 p[10] = 2048 >> 8; /* 2M buffer */
1206 p[11] = 2048 & 0xff;
1207 p[12] = (16 * 176) >> 8; /* 16x read speed current */
1208 p[13] = (16 * 176) & 0xff;
1209 p[16] = (16 * 176) >> 8; /* 16x write speed */
1210 p[17] = (16 * 176) & 0xff;
1211 p[18] = (16 * 176) >> 8; /* 16x write speed current */
1212 p[19] = (16 * 176) & 0xff;
1213 break;
1214
1215 default:
1216 return -1;
1217 }
1218
1219 assert(length < 256);
1220 (*p_outbuf)[0] = page;
1221 (*p_outbuf)[1] = length;
1222 *p_outbuf += length + 2;
1223 return length + 2;
1224 }
1225
1226 static int scsi_disk_emulate_mode_sense(SCSIDiskReq *r, uint8_t *outbuf)
1227 {
1228 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
1229 uint64_t nb_sectors;
1230 bool dbd;
1231 int page, buflen, ret, page_control;
1232 uint8_t *p;
1233 uint8_t dev_specific_param;
1234
1235 dbd = (r->req.cmd.buf[1] & 0x8) != 0;
1236 page = r->req.cmd.buf[2] & 0x3f;
1237 page_control = (r->req.cmd.buf[2] & 0xc0) >> 6;
1238 DPRINTF("Mode Sense(%d) (page %d, xfer %zd, page_control %d)\n",
1239 (r->req.cmd.buf[0] == MODE_SENSE) ? 6 : 10, page, r->req.cmd.xfer, page_control);
1240 memset(outbuf, 0, r->req.cmd.xfer);
1241 p = outbuf;
1242
1243 if (s->qdev.type == TYPE_DISK) {
1244 dev_specific_param = s->features & (1 << SCSI_DISK_F_DPOFUA) ? 0x10 : 0;
1245 if (blk_is_read_only(s->qdev.conf.blk)) {
1246 dev_specific_param |= 0x80; /* Readonly. */
1247 }
1248 } else {
1249 /* MMC prescribes that CD/DVD drives have no block descriptors,
1250 * and defines no device-specific parameter. */
1251 dev_specific_param = 0x00;
1252 dbd = true;
1253 }
1254
1255 if (r->req.cmd.buf[0] == MODE_SENSE) {
1256 p[1] = 0; /* Default media type. */
1257 p[2] = dev_specific_param;
1258 p[3] = 0; /* Block descriptor length. */
1259 p += 4;
1260 } else { /* MODE_SENSE_10 */
1261 p[2] = 0; /* Default media type. */
1262 p[3] = dev_specific_param;
1263 p[6] = p[7] = 0; /* Block descriptor length. */
1264 p += 8;
1265 }
1266
1267 blk_get_geometry(s->qdev.conf.blk, &nb_sectors);
1268 if (!dbd && nb_sectors) {
1269 if (r->req.cmd.buf[0] == MODE_SENSE) {
1270 outbuf[3] = 8; /* Block descriptor length */
1271 } else { /* MODE_SENSE_10 */
1272 outbuf[7] = 8; /* Block descriptor length */
1273 }
1274 nb_sectors /= (s->qdev.blocksize / 512);
1275 if (nb_sectors > 0xffffff) {
1276 nb_sectors = 0;
1277 }
1278 p[0] = 0; /* media density code */
1279 p[1] = (nb_sectors >> 16) & 0xff;
1280 p[2] = (nb_sectors >> 8) & 0xff;
1281 p[3] = nb_sectors & 0xff;
1282 p[4] = 0; /* reserved */
1283 p[5] = 0; /* bytes 5-7 are the sector size in bytes */
1284 p[6] = s->qdev.blocksize >> 8;
1285 p[7] = 0;
1286 p += 8;
1287 }
1288
1289 if (page_control == 3) {
1290 /* Saved Values */
1291 scsi_check_condition(r, SENSE_CODE(SAVING_PARAMS_NOT_SUPPORTED));
1292 return -1;
1293 }
1294
1295 if (page == 0x3f) {
1296 for (page = 0; page <= 0x3e; page++) {
1297 mode_sense_page(s, page, &p, page_control);
1298 }
1299 } else {
1300 ret = mode_sense_page(s, page, &p, page_control);
1301 if (ret == -1) {
1302 return -1;
1303 }
1304 }
1305
1306 buflen = p - outbuf;
1307 /*
1308 * The mode data length field specifies the length in bytes of the
1309 * following data that is available to be transferred. The mode data
1310 * length does not include itself.
1311 */
1312 if (r->req.cmd.buf[0] == MODE_SENSE) {
1313 outbuf[0] = buflen - 1;
1314 } else { /* MODE_SENSE_10 */
1315 outbuf[0] = ((buflen - 2) >> 8) & 0xff;
1316 outbuf[1] = (buflen - 2) & 0xff;
1317 }
1318 return buflen;
1319 }
1320
1321 static int scsi_disk_emulate_read_toc(SCSIRequest *req, uint8_t *outbuf)
1322 {
1323 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
1324 int start_track, format, msf, toclen;
1325 uint64_t nb_sectors;
1326
1327 msf = req->cmd.buf[1] & 2;
1328 format = req->cmd.buf[2] & 0xf;
1329 start_track = req->cmd.buf[6];
1330 blk_get_geometry(s->qdev.conf.blk, &nb_sectors);
1331 DPRINTF("Read TOC (track %d format %d msf %d)\n", start_track, format, msf >> 1);
1332 nb_sectors /= s->qdev.blocksize / 512;
1333 switch (format) {
1334 case 0:
1335 toclen = cdrom_read_toc(nb_sectors, outbuf, msf, start_track);
1336 break;
1337 case 1:
1338 /* multi session : only a single session defined */
1339 toclen = 12;
1340 memset(outbuf, 0, 12);
1341 outbuf[1] = 0x0a;
1342 outbuf[2] = 0x01;
1343 outbuf[3] = 0x01;
1344 break;
1345 case 2:
1346 toclen = cdrom_read_toc_raw(nb_sectors, outbuf, msf, start_track);
1347 break;
1348 default:
1349 return -1;
1350 }
1351 return toclen;
1352 }
1353
1354 static int scsi_disk_emulate_start_stop(SCSIDiskReq *r)
1355 {
1356 SCSIRequest *req = &r->req;
1357 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
1358 bool start = req->cmd.buf[4] & 1;
1359 bool loej = req->cmd.buf[4] & 2; /* load on start, eject on !start */
1360 int pwrcnd = req->cmd.buf[4] & 0xf0;
1361
1362 if (pwrcnd) {
1363 /* eject/load only happens for power condition == 0 */
1364 return 0;
1365 }
1366
1367 if ((s->features & (1 << SCSI_DISK_F_REMOVABLE)) && loej) {
1368 if (!start && !s->tray_open && s->tray_locked) {
1369 scsi_check_condition(r,
1370 blk_is_inserted(s->qdev.conf.blk)
1371 ? SENSE_CODE(ILLEGAL_REQ_REMOVAL_PREVENTED)
1372 : SENSE_CODE(NOT_READY_REMOVAL_PREVENTED));
1373 return -1;
1374 }
1375
1376 if (s->tray_open != !start) {
1377 blk_eject(s->qdev.conf.blk, !start);
1378 s->tray_open = !start;
1379 }
1380 }
1381 return 0;
1382 }
1383
1384 static void scsi_disk_emulate_read_data(SCSIRequest *req)
1385 {
1386 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
1387 int buflen = r->iov.iov_len;
1388
1389 if (buflen) {
1390 DPRINTF("Read buf_len=%d\n", buflen);
1391 r->iov.iov_len = 0;
1392 r->started = true;
1393 scsi_req_data(&r->req, buflen);
1394 return;
1395 }
1396
1397 /* This also clears the sense buffer for REQUEST SENSE. */
1398 scsi_req_complete(&r->req, GOOD);
1399 }
1400
1401 static int scsi_disk_check_mode_select(SCSIDiskState *s, int page,
1402 uint8_t *inbuf, int inlen)
1403 {
1404 uint8_t mode_current[SCSI_MAX_MODE_LEN];
1405 uint8_t mode_changeable[SCSI_MAX_MODE_LEN];
1406 uint8_t *p;
1407 int len, expected_len, changeable_len, i;
1408
1409 /* The input buffer does not include the page header, so it is
1410 * off by 2 bytes.
1411 */
1412 expected_len = inlen + 2;
1413 if (expected_len > SCSI_MAX_MODE_LEN) {
1414 return -1;
1415 }
1416
1417 p = mode_current;
1418 memset(mode_current, 0, inlen + 2);
1419 len = mode_sense_page(s, page, &p, 0);
1420 if (len < 0 || len != expected_len) {
1421 return -1;
1422 }
1423
1424 p = mode_changeable;
1425 memset(mode_changeable, 0, inlen + 2);
1426 changeable_len = mode_sense_page(s, page, &p, 1);
1427 assert(changeable_len == len);
1428
1429 /* Check that unchangeable bits are the same as what MODE SENSE
1430 * would return.
1431 */
1432 for (i = 2; i < len; i++) {
1433 if (((mode_current[i] ^ inbuf[i - 2]) & ~mode_changeable[i]) != 0) {
1434 return -1;
1435 }
1436 }
1437 return 0;
1438 }
1439
1440 static void scsi_disk_apply_mode_select(SCSIDiskState *s, int page, uint8_t *p)
1441 {
1442 switch (page) {
1443 case MODE_PAGE_CACHING:
1444 blk_set_enable_write_cache(s->qdev.conf.blk, (p[0] & 4) != 0);
1445 break;
1446
1447 default:
1448 break;
1449 }
1450 }
1451
1452 static int mode_select_pages(SCSIDiskReq *r, uint8_t *p, int len, bool change)
1453 {
1454 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
1455
1456 while (len > 0) {
1457 int page, subpage, page_len;
1458
1459 /* Parse both possible formats for the mode page headers. */
1460 page = p[0] & 0x3f;
1461 if (p[0] & 0x40) {
1462 if (len < 4) {
1463 goto invalid_param_len;
1464 }
1465 subpage = p[1];
1466 page_len = lduw_be_p(&p[2]);
1467 p += 4;
1468 len -= 4;
1469 } else {
1470 if (len < 2) {
1471 goto invalid_param_len;
1472 }
1473 subpage = 0;
1474 page_len = p[1];
1475 p += 2;
1476 len -= 2;
1477 }
1478
1479 if (subpage) {
1480 goto invalid_param;
1481 }
1482 if (page_len > len) {
1483 goto invalid_param_len;
1484 }
1485
1486 if (!change) {
1487 if (scsi_disk_check_mode_select(s, page, p, page_len) < 0) {
1488 goto invalid_param;
1489 }
1490 } else {
1491 scsi_disk_apply_mode_select(s, page, p);
1492 }
1493
1494 p += page_len;
1495 len -= page_len;
1496 }
1497 return 0;
1498
1499 invalid_param:
1500 scsi_check_condition(r, SENSE_CODE(INVALID_PARAM));
1501 return -1;
1502
1503 invalid_param_len:
1504 scsi_check_condition(r, SENSE_CODE(INVALID_PARAM_LEN));
1505 return -1;
1506 }
1507
1508 static void scsi_disk_emulate_mode_select(SCSIDiskReq *r, uint8_t *inbuf)
1509 {
1510 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
1511 uint8_t *p = inbuf;
1512 int cmd = r->req.cmd.buf[0];
1513 int len = r->req.cmd.xfer;
1514 int hdr_len = (cmd == MODE_SELECT ? 4 : 8);
1515 int bd_len;
1516 int pass;
1517
1518 /* We only support PF=1, SP=0. */
1519 if ((r->req.cmd.buf[1] & 0x11) != 0x10) {
1520 goto invalid_field;
1521 }
1522
1523 if (len < hdr_len) {
1524 goto invalid_param_len;
1525 }
1526
1527 bd_len = (cmd == MODE_SELECT ? p[3] : lduw_be_p(&p[6]));
1528 len -= hdr_len;
1529 p += hdr_len;
1530 if (len < bd_len) {
1531 goto invalid_param_len;
1532 }
1533 if (bd_len != 0 && bd_len != 8) {
1534 goto invalid_param;
1535 }
1536
1537 len -= bd_len;
1538 p += bd_len;
1539
1540 /* Ensure no change is made if there is an error! */
1541 for (pass = 0; pass < 2; pass++) {
1542 if (mode_select_pages(r, p, len, pass == 1) < 0) {
1543 assert(pass == 0);
1544 return;
1545 }
1546 }
1547 if (!blk_enable_write_cache(s->qdev.conf.blk)) {
1548 /* The request is used as the AIO opaque value, so add a ref. */
1549 scsi_req_ref(&r->req);
1550 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 0,
1551 BLOCK_ACCT_FLUSH);
1552 r->req.aiocb = blk_aio_flush(s->qdev.conf.blk, scsi_aio_complete, r);
1553 return;
1554 }
1555
1556 scsi_req_complete(&r->req, GOOD);
1557 return;
1558
1559 invalid_param:
1560 scsi_check_condition(r, SENSE_CODE(INVALID_PARAM));
1561 return;
1562
1563 invalid_param_len:
1564 scsi_check_condition(r, SENSE_CODE(INVALID_PARAM_LEN));
1565 return;
1566
1567 invalid_field:
1568 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
1569 }
1570
1571 static inline bool check_lba_range(SCSIDiskState *s,
1572 uint64_t sector_num, uint32_t nb_sectors)
1573 {
1574 /*
1575 * The first line tests that no overflow happens when computing the last
1576 * sector. The second line tests that the last accessed sector is in
1577 * range.
1578 *
1579 * Careful, the computations should not underflow for nb_sectors == 0,
1580 * and a 0-block read to the first LBA beyond the end of device is
1581 * valid.
1582 */
1583 return (sector_num <= sector_num + nb_sectors &&
1584 sector_num + nb_sectors <= s->qdev.max_lba + 1);
1585 }
1586
1587 typedef struct UnmapCBData {
1588 SCSIDiskReq *r;
1589 uint8_t *inbuf;
1590 int count;
1591 } UnmapCBData;
1592
1593 static void scsi_unmap_complete(void *opaque, int ret);
1594
1595 static void scsi_unmap_complete_noio(UnmapCBData *data, int ret)
1596 {
1597 SCSIDiskReq *r = data->r;
1598 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
1599 uint64_t sector_num;
1600 uint32_t nb_sectors;
1601
1602 assert(r->req.aiocb == NULL);
1603
1604 if (r->req.io_canceled) {
1605 scsi_req_cancel_complete(&r->req);
1606 goto done;
1607 }
1608
1609 if (ret < 0) {
1610 if (scsi_handle_rw_error(r, -ret, false)) {
1611 goto done;
1612 }
1613 }
1614
1615 if (data->count > 0) {
1616 sector_num = ldq_be_p(&data->inbuf[0]);
1617 nb_sectors = ldl_be_p(&data->inbuf[8]) & 0xffffffffULL;
1618 if (!check_lba_range(s, sector_num, nb_sectors)) {
1619 scsi_check_condition(r, SENSE_CODE(LBA_OUT_OF_RANGE));
1620 goto done;
1621 }
1622
1623 r->req.aiocb = blk_aio_discard(s->qdev.conf.blk,
1624 sector_num * (s->qdev.blocksize / 512),
1625 nb_sectors * (s->qdev.blocksize / 512),
1626 scsi_unmap_complete, data);
1627 data->count--;
1628 data->inbuf += 16;
1629 return;
1630 }
1631
1632 scsi_req_complete(&r->req, GOOD);
1633
1634 done:
1635 scsi_req_unref(&r->req);
1636 g_free(data);
1637 }
1638
1639 static void scsi_unmap_complete(void *opaque, int ret)
1640 {
1641 UnmapCBData *data = opaque;
1642 SCSIDiskReq *r = data->r;
1643
1644 assert(r->req.aiocb != NULL);
1645 r->req.aiocb = NULL;
1646
1647 scsi_unmap_complete_noio(data, ret);
1648 }
1649
1650 static void scsi_disk_emulate_unmap(SCSIDiskReq *r, uint8_t *inbuf)
1651 {
1652 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
1653 uint8_t *p = inbuf;
1654 int len = r->req.cmd.xfer;
1655 UnmapCBData *data;
1656
1657 /* Reject ANCHOR=1. */
1658 if (r->req.cmd.buf[1] & 0x1) {
1659 goto invalid_field;
1660 }
1661
1662 if (len < 8) {
1663 goto invalid_param_len;
1664 }
1665 if (len < lduw_be_p(&p[0]) + 2) {
1666 goto invalid_param_len;
1667 }
1668 if (len < lduw_be_p(&p[2]) + 8) {
1669 goto invalid_param_len;
1670 }
1671 if (lduw_be_p(&p[2]) & 15) {
1672 goto invalid_param_len;
1673 }
1674
1675 if (blk_is_read_only(s->qdev.conf.blk)) {
1676 scsi_check_condition(r, SENSE_CODE(WRITE_PROTECTED));
1677 return;
1678 }
1679
1680 data = g_new0(UnmapCBData, 1);
1681 data->r = r;
1682 data->inbuf = &p[8];
1683 data->count = lduw_be_p(&p[2]) >> 4;
1684
1685 /* The matching unref is in scsi_unmap_complete, before data is freed. */
1686 scsi_req_ref(&r->req);
1687 scsi_unmap_complete_noio(data, 0);
1688 return;
1689
1690 invalid_param_len:
1691 scsi_check_condition(r, SENSE_CODE(INVALID_PARAM_LEN));
1692 return;
1693
1694 invalid_field:
1695 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
1696 }
1697
1698 typedef struct WriteSameCBData {
1699 SCSIDiskReq *r;
1700 int64_t sector;
1701 int nb_sectors;
1702 QEMUIOVector qiov;
1703 struct iovec iov;
1704 } WriteSameCBData;
1705
1706 static void scsi_write_same_complete(void *opaque, int ret)
1707 {
1708 WriteSameCBData *data = opaque;
1709 SCSIDiskReq *r = data->r;
1710 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
1711
1712 assert(r->req.aiocb != NULL);
1713 r->req.aiocb = NULL;
1714 if (r->req.io_canceled) {
1715 scsi_req_cancel_complete(&r->req);
1716 goto done;
1717 }
1718
1719 if (ret < 0) {
1720 if (scsi_handle_rw_error(r, -ret, true)) {
1721 goto done;
1722 }
1723 }
1724
1725 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct);
1726
1727 data->nb_sectors -= data->iov.iov_len / 512;
1728 data->sector += data->iov.iov_len / 512;
1729 data->iov.iov_len = MIN(data->nb_sectors * 512, data->iov.iov_len);
1730 if (data->iov.iov_len) {
1731 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct,
1732 data->iov.iov_len, BLOCK_ACCT_WRITE);
1733 /* blk_aio_write doesn't like the qiov size being different from
1734 * nb_sectors, make sure they match.
1735 */
1736 qemu_iovec_init_external(&data->qiov, &data->iov, 1);
1737 r->req.aiocb = blk_aio_writev(s->qdev.conf.blk, data->sector,
1738 &data->qiov, data->iov.iov_len / 512,
1739 scsi_write_same_complete, data);
1740 return;
1741 }
1742
1743 scsi_req_complete(&r->req, GOOD);
1744
1745 done:
1746 scsi_req_unref(&r->req);
1747 qemu_vfree(data->iov.iov_base);
1748 g_free(data);
1749 }
1750
1751 static void scsi_disk_emulate_write_same(SCSIDiskReq *r, uint8_t *inbuf)
1752 {
1753 SCSIRequest *req = &r->req;
1754 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
1755 uint32_t nb_sectors = scsi_data_cdb_xfer(r->req.cmd.buf);
1756 WriteSameCBData *data;
1757 uint8_t *buf;
1758 int i;
1759
1760 /* Fail if PBDATA=1 or LBDATA=1 or ANCHOR=1. */
1761 if (nb_sectors == 0 || (req->cmd.buf[1] & 0x16)) {
1762 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
1763 return;
1764 }
1765
1766 if (blk_is_read_only(s->qdev.conf.blk)) {
1767 scsi_check_condition(r, SENSE_CODE(WRITE_PROTECTED));
1768 return;
1769 }
1770 if (!check_lba_range(s, r->req.cmd.lba, nb_sectors)) {
1771 scsi_check_condition(r, SENSE_CODE(LBA_OUT_OF_RANGE));
1772 return;
1773 }
1774
1775 if (buffer_is_zero(inbuf, s->qdev.blocksize)) {
1776 int flags = (req->cmd.buf[1] & 0x8) ? BDRV_REQ_MAY_UNMAP : 0;
1777
1778 /* The request is used as the AIO opaque value, so add a ref. */
1779 scsi_req_ref(&r->req);
1780 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct,
1781 nb_sectors * s->qdev.blocksize,
1782 BLOCK_ACCT_WRITE);
1783 r->req.aiocb = blk_aio_write_zeroes(s->qdev.conf.blk,
1784 r->req.cmd.lba * (s->qdev.blocksize / 512),
1785 nb_sectors * (s->qdev.blocksize / 512),
1786 flags, scsi_aio_complete, r);
1787 return;
1788 }
1789
1790 data = g_new0(WriteSameCBData, 1);
1791 data->r = r;
1792 data->sector = r->req.cmd.lba * (s->qdev.blocksize / 512);
1793 data->nb_sectors = nb_sectors * (s->qdev.blocksize / 512);
1794 data->iov.iov_len = MIN(data->nb_sectors * 512, SCSI_WRITE_SAME_MAX);
1795 data->iov.iov_base = buf = blk_blockalign(s->qdev.conf.blk,
1796 data->iov.iov_len);
1797 qemu_iovec_init_external(&data->qiov, &data->iov, 1);
1798
1799 for (i = 0; i < data->iov.iov_len; i += s->qdev.blocksize) {
1800 memcpy(&buf[i], inbuf, s->qdev.blocksize);
1801 }
1802
1803 scsi_req_ref(&r->req);
1804 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct,
1805 data->iov.iov_len, BLOCK_ACCT_WRITE);
1806 r->req.aiocb = blk_aio_writev(s->qdev.conf.blk, data->sector,
1807 &data->qiov, data->iov.iov_len / 512,
1808 scsi_write_same_complete, data);
1809 }
1810
1811 static void scsi_disk_emulate_write_data(SCSIRequest *req)
1812 {
1813 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
1814
1815 if (r->iov.iov_len) {
1816 int buflen = r->iov.iov_len;
1817 DPRINTF("Write buf_len=%d\n", buflen);
1818 r->iov.iov_len = 0;
1819 scsi_req_data(&r->req, buflen);
1820 return;
1821 }
1822
1823 switch (req->cmd.buf[0]) {
1824 case MODE_SELECT:
1825 case MODE_SELECT_10:
1826 /* This also clears the sense buffer for REQUEST SENSE. */
1827 scsi_disk_emulate_mode_select(r, r->iov.iov_base);
1828 break;
1829
1830 case UNMAP:
1831 scsi_disk_emulate_unmap(r, r->iov.iov_base);
1832 break;
1833
1834 case VERIFY_10:
1835 case VERIFY_12:
1836 case VERIFY_16:
1837 if (r->req.status == -1) {
1838 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
1839 }
1840 break;
1841
1842 case WRITE_SAME_10:
1843 case WRITE_SAME_16:
1844 scsi_disk_emulate_write_same(r, r->iov.iov_base);
1845 break;
1846
1847 default:
1848 abort();
1849 }
1850 }
1851
1852 static int32_t scsi_disk_emulate_command(SCSIRequest *req, uint8_t *buf)
1853 {
1854 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
1855 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
1856 uint64_t nb_sectors;
1857 uint8_t *outbuf;
1858 int buflen;
1859
1860 switch (req->cmd.buf[0]) {
1861 case INQUIRY:
1862 case MODE_SENSE:
1863 case MODE_SENSE_10:
1864 case RESERVE:
1865 case RESERVE_10:
1866 case RELEASE:
1867 case RELEASE_10:
1868 case START_STOP:
1869 case ALLOW_MEDIUM_REMOVAL:
1870 case GET_CONFIGURATION:
1871 case GET_EVENT_STATUS_NOTIFICATION:
1872 case MECHANISM_STATUS:
1873 case REQUEST_SENSE:
1874 break;
1875
1876 default:
1877 if (s->tray_open || !blk_is_inserted(s->qdev.conf.blk)) {
1878 scsi_check_condition(r, SENSE_CODE(NO_MEDIUM));
1879 return 0;
1880 }
1881 break;
1882 }
1883
1884 /*
1885 * FIXME: we shouldn't return anything bigger than 4k, but the code
1886 * requires the buffer to be as big as req->cmd.xfer in several
1887 * places. So, do not allow CDBs with a very large ALLOCATION
1888 * LENGTH. The real fix would be to modify scsi_read_data and
1889 * dma_buf_read, so that they return data beyond the buflen
1890 * as all zeros.
1891 */
1892 if (req->cmd.xfer > 65536) {
1893 goto illegal_request;
1894 }
1895 r->buflen = MAX(4096, req->cmd.xfer);
1896
1897 if (!r->iov.iov_base) {
1898 r->iov.iov_base = blk_blockalign(s->qdev.conf.blk, r->buflen);
1899 }
1900
1901 buflen = req->cmd.xfer;
1902 outbuf = r->iov.iov_base;
1903 memset(outbuf, 0, r->buflen);
1904 switch (req->cmd.buf[0]) {
1905 case TEST_UNIT_READY:
1906 assert(!s->tray_open && blk_is_inserted(s->qdev.conf.blk));
1907 break;
1908 case INQUIRY:
1909 buflen = scsi_disk_emulate_inquiry(req, outbuf);
1910 if (buflen < 0) {
1911 goto illegal_request;
1912 }
1913 break;
1914 case MODE_SENSE:
1915 case MODE_SENSE_10:
1916 buflen = scsi_disk_emulate_mode_sense(r, outbuf);
1917 if (buflen < 0) {
1918 goto illegal_request;
1919 }
1920 break;
1921 case READ_TOC:
1922 buflen = scsi_disk_emulate_read_toc(req, outbuf);
1923 if (buflen < 0) {
1924 goto illegal_request;
1925 }
1926 break;
1927 case RESERVE:
1928 if (req->cmd.buf[1] & 1) {
1929 goto illegal_request;
1930 }
1931 break;
1932 case RESERVE_10:
1933 if (req->cmd.buf[1] & 3) {
1934 goto illegal_request;
1935 }
1936 break;
1937 case RELEASE:
1938 if (req->cmd.buf[1] & 1) {
1939 goto illegal_request;
1940 }
1941 break;
1942 case RELEASE_10:
1943 if (req->cmd.buf[1] & 3) {
1944 goto illegal_request;
1945 }
1946 break;
1947 case START_STOP:
1948 if (scsi_disk_emulate_start_stop(r) < 0) {
1949 return 0;
1950 }
1951 break;
1952 case ALLOW_MEDIUM_REMOVAL:
1953 s->tray_locked = req->cmd.buf[4] & 1;
1954 blk_lock_medium(s->qdev.conf.blk, req->cmd.buf[4] & 1);
1955 break;
1956 case READ_CAPACITY_10:
1957 /* The normal LEN field for this command is zero. */
1958 memset(outbuf, 0, 8);
1959 blk_get_geometry(s->qdev.conf.blk, &nb_sectors);
1960 if (!nb_sectors) {
1961 scsi_check_condition(r, SENSE_CODE(LUN_NOT_READY));
1962 return 0;
1963 }
1964 if ((req->cmd.buf[8] & 1) == 0 && req->cmd.lba) {
1965 goto illegal_request;
1966 }
1967 nb_sectors /= s->qdev.blocksize / 512;
1968 /* Returned value is the address of the last sector. */
1969 nb_sectors--;
1970 /* Remember the new size for read/write sanity checking. */
1971 s->qdev.max_lba = nb_sectors;
1972 /* Clip to 2TB, instead of returning capacity modulo 2TB. */
1973 if (nb_sectors > UINT32_MAX) {
1974 nb_sectors = UINT32_MAX;
1975 }
1976 outbuf[0] = (nb_sectors >> 24) & 0xff;
1977 outbuf[1] = (nb_sectors >> 16) & 0xff;
1978 outbuf[2] = (nb_sectors >> 8) & 0xff;
1979 outbuf[3] = nb_sectors & 0xff;
1980 outbuf[4] = 0;
1981 outbuf[5] = 0;
1982 outbuf[6] = s->qdev.blocksize >> 8;
1983 outbuf[7] = 0;
1984 break;
1985 case REQUEST_SENSE:
1986 /* Just return "NO SENSE". */
1987 buflen = scsi_build_sense(NULL, 0, outbuf, r->buflen,
1988 (req->cmd.buf[1] & 1) == 0);
1989 if (buflen < 0) {
1990 goto illegal_request;
1991 }
1992 break;
1993 case MECHANISM_STATUS:
1994 buflen = scsi_emulate_mechanism_status(s, outbuf);
1995 if (buflen < 0) {
1996 goto illegal_request;
1997 }
1998 break;
1999 case GET_CONFIGURATION:
2000 buflen = scsi_get_configuration(s, outbuf);
2001 if (buflen < 0) {
2002 goto illegal_request;
2003 }
2004 break;
2005 case GET_EVENT_STATUS_NOTIFICATION:
2006 buflen = scsi_get_event_status_notification(s, r, outbuf);
2007 if (buflen < 0) {
2008 goto illegal_request;
2009 }
2010 break;
2011 case READ_DISC_INFORMATION:
2012 buflen = scsi_read_disc_information(s, r, outbuf);
2013 if (buflen < 0) {
2014 goto illegal_request;
2015 }
2016 break;
2017 case READ_DVD_STRUCTURE:
2018 buflen = scsi_read_dvd_structure(s, r, outbuf);
2019 if (buflen < 0) {
2020 goto illegal_request;
2021 }
2022 break;
2023 case SERVICE_ACTION_IN_16:
2024 /* Service Action In subcommands. */
2025 if ((req->cmd.buf[1] & 31) == SAI_READ_CAPACITY_16) {
2026 DPRINTF("SAI READ CAPACITY(16)\n");
2027 memset(outbuf, 0, req->cmd.xfer);
2028 blk_get_geometry(s->qdev.conf.blk, &nb_sectors);
2029 if (!nb_sectors) {
2030 scsi_check_condition(r, SENSE_CODE(LUN_NOT_READY));
2031 return 0;
2032 }
2033 if ((req->cmd.buf[14] & 1) == 0 && req->cmd.lba) {
2034 goto illegal_request;
2035 }
2036 nb_sectors /= s->qdev.blocksize / 512;
2037 /* Returned value is the address of the last sector. */
2038 nb_sectors--;
2039 /* Remember the new size for read/write sanity checking. */
2040 s->qdev.max_lba = nb_sectors;
2041 outbuf[0] = (nb_sectors >> 56) & 0xff;
2042 outbuf[1] = (nb_sectors >> 48) & 0xff;
2043 outbuf[2] = (nb_sectors >> 40) & 0xff;
2044 outbuf[3] = (nb_sectors >> 32) & 0xff;
2045 outbuf[4] = (nb_sectors >> 24) & 0xff;
2046 outbuf[5] = (nb_sectors >> 16) & 0xff;
2047 outbuf[6] = (nb_sectors >> 8) & 0xff;
2048 outbuf[7] = nb_sectors & 0xff;
2049 outbuf[8] = 0;
2050 outbuf[9] = 0;
2051 outbuf[10] = s->qdev.blocksize >> 8;
2052 outbuf[11] = 0;
2053 outbuf[12] = 0;
2054 outbuf[13] = get_physical_block_exp(&s->qdev.conf);
2055
2056 /* set TPE bit if the format supports discard */
2057 if (s->qdev.conf.discard_granularity) {
2058 outbuf[14] = 0x80;
2059 }
2060
2061 /* Protection, exponent and lowest lba field left blank. */
2062 break;
2063 }
2064 DPRINTF("Unsupported Service Action In\n");
2065 goto illegal_request;
2066 case SYNCHRONIZE_CACHE:
2067 /* The request is used as the AIO opaque value, so add a ref. */
2068 scsi_req_ref(&r->req);
2069 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 0,
2070 BLOCK_ACCT_FLUSH);
2071 r->req.aiocb = blk_aio_flush(s->qdev.conf.blk, scsi_aio_complete, r);
2072 return 0;
2073 case SEEK_10:
2074 DPRINTF("Seek(10) (sector %" PRId64 ")\n", r->req.cmd.lba);
2075 if (r->req.cmd.lba > s->qdev.max_lba) {
2076 goto illegal_lba;
2077 }
2078 break;
2079 case MODE_SELECT:
2080 DPRINTF("Mode Select(6) (len %lu)\n", (long)r->req.cmd.xfer);
2081 break;
2082 case MODE_SELECT_10:
2083 DPRINTF("Mode Select(10) (len %lu)\n", (long)r->req.cmd.xfer);
2084 break;
2085 case UNMAP:
2086 DPRINTF("Unmap (len %lu)\n", (long)r->req.cmd.xfer);
2087 break;
2088 case VERIFY_10:
2089 case VERIFY_12:
2090 case VERIFY_16:
2091 DPRINTF("Verify (bytchk %d)\n", (req->cmd.buf[1] >> 1) & 3);
2092 if (req->cmd.buf[1] & 6) {
2093 goto illegal_request;
2094 }
2095 break;
2096 case WRITE_SAME_10:
2097 case WRITE_SAME_16:
2098 DPRINTF("WRITE SAME %d (len %lu)\n",
2099 req->cmd.buf[0] == WRITE_SAME_10 ? 10 : 16,
2100 (long)r->req.cmd.xfer);
2101 break;
2102 default:
2103 DPRINTF("Unknown SCSI command (%2.2x=%s)\n", buf[0],
2104 scsi_command_name(buf[0]));
2105 scsi_check_condition(r, SENSE_CODE(INVALID_OPCODE));
2106 return 0;
2107 }
2108 assert(!r->req.aiocb);
2109 r->iov.iov_len = MIN(r->buflen, req->cmd.xfer);
2110 if (r->iov.iov_len == 0) {
2111 scsi_req_complete(&r->req, GOOD);
2112 }
2113 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
2114 assert(r->iov.iov_len == req->cmd.xfer);
2115 return -r->iov.iov_len;
2116 } else {
2117 return r->iov.iov_len;
2118 }
2119
2120 illegal_request:
2121 if (r->req.status == -1) {
2122 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
2123 }
2124 return 0;
2125
2126 illegal_lba:
2127 scsi_check_condition(r, SENSE_CODE(LBA_OUT_OF_RANGE));
2128 return 0;
2129 }
2130
2131 /* Execute a scsi command. Returns the length of the data expected by the
2132 command. This will be Positive for data transfers from the device
2133 (eg. disk reads), negative for transfers to the device (eg. disk writes),
2134 and zero if the command does not transfer any data. */
2135
2136 static int32_t scsi_disk_dma_command(SCSIRequest *req, uint8_t *buf)
2137 {
2138 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
2139 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
2140 uint32_t len;
2141 uint8_t command;
2142
2143 command = buf[0];
2144
2145 if (s->tray_open || !blk_is_inserted(s->qdev.conf.blk)) {
2146 scsi_check_condition(r, SENSE_CODE(NO_MEDIUM));
2147 return 0;
2148 }
2149
2150 len = scsi_data_cdb_xfer(r->req.cmd.buf);
2151 switch (command) {
2152 case READ_6:
2153 case READ_10:
2154 case READ_12:
2155 case READ_16:
2156 DPRINTF("Read (sector %" PRId64 ", count %u)\n", r->req.cmd.lba, len);
2157 if (r->req.cmd.buf[1] & 0xe0) {
2158 goto illegal_request;
2159 }
2160 if (!check_lba_range(s, r->req.cmd.lba, len)) {
2161 goto illegal_lba;
2162 }
2163 r->sector = r->req.cmd.lba * (s->qdev.blocksize / 512);
2164 r->sector_count = len * (s->qdev.blocksize / 512);
2165 break;
2166 case WRITE_6:
2167 case WRITE_10:
2168 case WRITE_12:
2169 case WRITE_16:
2170 case WRITE_VERIFY_10:
2171 case WRITE_VERIFY_12:
2172 case WRITE_VERIFY_16:
2173 if (blk_is_read_only(s->qdev.conf.blk)) {
2174 scsi_check_condition(r, SENSE_CODE(WRITE_PROTECTED));
2175 return 0;
2176 }
2177 DPRINTF("Write %s(sector %" PRId64 ", count %u)\n",
2178 (command & 0xe) == 0xe ? "And Verify " : "",
2179 r->req.cmd.lba, len);
2180 if (r->req.cmd.buf[1] & 0xe0) {
2181 goto illegal_request;
2182 }
2183 if (!check_lba_range(s, r->req.cmd.lba, len)) {
2184 goto illegal_lba;
2185 }
2186 r->sector = r->req.cmd.lba * (s->qdev.blocksize / 512);
2187 r->sector_count = len * (s->qdev.blocksize / 512);
2188 break;
2189 default:
2190 abort();
2191 illegal_request:
2192 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
2193 return 0;
2194 illegal_lba:
2195 scsi_check_condition(r, SENSE_CODE(LBA_OUT_OF_RANGE));
2196 return 0;
2197 }
2198 if (r->sector_count == 0) {
2199 scsi_req_complete(&r->req, GOOD);
2200 }
2201 assert(r->iov.iov_len == 0);
2202 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
2203 return -r->sector_count * 512;
2204 } else {
2205 return r->sector_count * 512;
2206 }
2207 }
2208
2209 static void scsi_disk_reset(DeviceState *dev)
2210 {
2211 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev.qdev, dev);
2212 uint64_t nb_sectors;
2213
2214 scsi_device_purge_requests(&s->qdev, SENSE_CODE(RESET));
2215
2216 blk_get_geometry(s->qdev.conf.blk, &nb_sectors);
2217 nb_sectors /= s->qdev.blocksize / 512;
2218 if (nb_sectors) {
2219 nb_sectors--;
2220 }
2221 s->qdev.max_lba = nb_sectors;
2222 /* reset tray statuses */
2223 s->tray_locked = 0;
2224 s->tray_open = 0;
2225 }
2226
2227 static void scsi_disk_resize_cb(void *opaque)
2228 {
2229 SCSIDiskState *s = opaque;
2230
2231 /* SPC lists this sense code as available only for
2232 * direct-access devices.
2233 */
2234 if (s->qdev.type == TYPE_DISK) {
2235 scsi_device_report_change(&s->qdev, SENSE_CODE(CAPACITY_CHANGED));
2236 }
2237 }
2238
2239 static void scsi_cd_change_media_cb(void *opaque, bool load)
2240 {
2241 SCSIDiskState *s = opaque;
2242
2243 /*
2244 * When a CD gets changed, we have to report an ejected state and
2245 * then a loaded state to guests so that they detect tray
2246 * open/close and media change events. Guests that do not use
2247 * GET_EVENT_STATUS_NOTIFICATION to detect such tray open/close
2248 * states rely on this behavior.
2249 *
2250 * media_changed governs the state machine used for unit attention
2251 * report. media_event is used by GET EVENT STATUS NOTIFICATION.
2252 */
2253 s->media_changed = load;
2254 s->tray_open = !load;
2255 scsi_device_set_ua(&s->qdev, SENSE_CODE(UNIT_ATTENTION_NO_MEDIUM));
2256 s->media_event = true;
2257 s->eject_request = false;
2258 }
2259
2260 static void scsi_cd_eject_request_cb(void *opaque, bool force)
2261 {
2262 SCSIDiskState *s = opaque;
2263
2264 s->eject_request = true;
2265 if (force) {
2266 s->tray_locked = false;
2267 }
2268 }
2269
2270 static bool scsi_cd_is_tray_open(void *opaque)
2271 {
2272 return ((SCSIDiskState *)opaque)->tray_open;
2273 }
2274
2275 static bool scsi_cd_is_medium_locked(void *opaque)
2276 {
2277 return ((SCSIDiskState *)opaque)->tray_locked;
2278 }
2279
2280 static const BlockDevOps scsi_disk_removable_block_ops = {
2281 .change_media_cb = scsi_cd_change_media_cb,
2282 .eject_request_cb = scsi_cd_eject_request_cb,
2283 .is_tray_open = scsi_cd_is_tray_open,
2284 .is_medium_locked = scsi_cd_is_medium_locked,
2285
2286 .resize_cb = scsi_disk_resize_cb,
2287 };
2288
2289 static const BlockDevOps scsi_disk_block_ops = {
2290 .resize_cb = scsi_disk_resize_cb,
2291 };
2292
2293 static void scsi_disk_unit_attention_reported(SCSIDevice *dev)
2294 {
2295 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
2296 if (s->media_changed) {
2297 s->media_changed = false;
2298 scsi_device_set_ua(&s->qdev, SENSE_CODE(MEDIUM_CHANGED));
2299 }
2300 }
2301
2302 static void scsi_realize(SCSIDevice *dev, Error **errp)
2303 {
2304 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
2305 Error *err = NULL;
2306
2307 if (!s->qdev.conf.blk) {
2308 error_setg(errp, "drive property not set");
2309 return;
2310 }
2311
2312 if (!(s->features & (1 << SCSI_DISK_F_REMOVABLE)) &&
2313 !blk_is_inserted(s->qdev.conf.blk)) {
2314 error_setg(errp, "Device needs media, but drive is empty");
2315 return;
2316 }
2317
2318 blkconf_serial(&s->qdev.conf, &s->serial);
2319 blkconf_blocksizes(&s->qdev.conf);
2320 if (dev->type == TYPE_DISK) {
2321 blkconf_geometry(&dev->conf, NULL, 65535, 255, 255, &err);
2322 if (err) {
2323 error_propagate(errp, err);
2324 return;
2325 }
2326 }
2327
2328 if (s->qdev.conf.discard_granularity == -1) {
2329 s->qdev.conf.discard_granularity =
2330 MAX(s->qdev.conf.logical_block_size, DEFAULT_DISCARD_GRANULARITY);
2331 }
2332
2333 if (!s->version) {
2334 s->version = g_strdup(qemu_hw_version());
2335 }
2336 if (!s->vendor) {
2337 s->vendor = g_strdup("QEMU");
2338 }
2339
2340 if (blk_is_sg(s->qdev.conf.blk)) {
2341 error_setg(errp, "unwanted /dev/sg*");
2342 return;
2343 }
2344
2345 if ((s->features & (1 << SCSI_DISK_F_REMOVABLE)) &&
2346 !(s->features & (1 << SCSI_DISK_F_NO_REMOVABLE_DEVOPS))) {
2347 blk_set_dev_ops(s->qdev.conf.blk, &scsi_disk_removable_block_ops, s);
2348 } else {
2349 blk_set_dev_ops(s->qdev.conf.blk, &scsi_disk_block_ops, s);
2350 }
2351 blk_set_guest_block_size(s->qdev.conf.blk, s->qdev.blocksize);
2352
2353 blk_iostatus_enable(s->qdev.conf.blk);
2354 }
2355
2356 static void scsi_hd_realize(SCSIDevice *dev, Error **errp)
2357 {
2358 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
2359 /* can happen for devices without drive. The error message for missing
2360 * backend will be issued in scsi_realize
2361 */
2362 if (s->qdev.conf.blk) {
2363 blkconf_blocksizes(&s->qdev.conf);
2364 }
2365 s->qdev.blocksize = s->qdev.conf.logical_block_size;
2366 s->qdev.type = TYPE_DISK;
2367 if (!s->product) {
2368 s->product = g_strdup("QEMU HARDDISK");
2369 }
2370 scsi_realize(&s->qdev, errp);
2371 }
2372
2373 static void scsi_cd_realize(SCSIDevice *dev, Error **errp)
2374 {
2375 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
2376 s->qdev.blocksize = 2048;
2377 s->qdev.type = TYPE_ROM;
2378 s->features |= 1 << SCSI_DISK_F_REMOVABLE;
2379 if (!s->product) {
2380 s->product = g_strdup("QEMU CD-ROM");
2381 }
2382 scsi_realize(&s->qdev, errp);
2383 }
2384
2385 static void scsi_disk_realize(SCSIDevice *dev, Error **errp)
2386 {
2387 DriveInfo *dinfo;
2388 Error *local_err = NULL;
2389
2390 if (!dev->conf.blk) {
2391 scsi_realize(dev, &local_err);
2392 assert(local_err);
2393 error_propagate(errp, local_err);
2394 return;
2395 }
2396
2397 dinfo = blk_legacy_dinfo(dev->conf.blk);
2398 if (dinfo && dinfo->media_cd) {
2399 scsi_cd_realize(dev, errp);
2400 } else {
2401 scsi_hd_realize(dev, errp);
2402 }
2403 }
2404
2405 static const SCSIReqOps scsi_disk_emulate_reqops = {
2406 .size = sizeof(SCSIDiskReq),
2407 .free_req = scsi_free_request,
2408 .send_command = scsi_disk_emulate_command,
2409 .read_data = scsi_disk_emulate_read_data,
2410 .write_data = scsi_disk_emulate_write_data,
2411 .get_buf = scsi_get_buf,
2412 };
2413
2414 static const SCSIReqOps scsi_disk_dma_reqops = {
2415 .size = sizeof(SCSIDiskReq),
2416 .free_req = scsi_free_request,
2417 .send_command = scsi_disk_dma_command,
2418 .read_data = scsi_read_data,
2419 .write_data = scsi_write_data,
2420 .get_buf = scsi_get_buf,
2421 .load_request = scsi_disk_load_request,
2422 .save_request = scsi_disk_save_request,
2423 };
2424
2425 static const SCSIReqOps *const scsi_disk_reqops_dispatch[256] = {
2426 [TEST_UNIT_READY] = &scsi_disk_emulate_reqops,
2427 [INQUIRY] = &scsi_disk_emulate_reqops,
2428 [MODE_SENSE] = &scsi_disk_emulate_reqops,
2429 [MODE_SENSE_10] = &scsi_disk_emulate_reqops,
2430 [START_STOP] = &scsi_disk_emulate_reqops,
2431 [ALLOW_MEDIUM_REMOVAL] = &scsi_disk_emulate_reqops,
2432 [READ_CAPACITY_10] = &scsi_disk_emulate_reqops,
2433 [READ_TOC] = &scsi_disk_emulate_reqops,
2434 [READ_DVD_STRUCTURE] = &scsi_disk_emulate_reqops,
2435 [READ_DISC_INFORMATION] = &scsi_disk_emulate_reqops,
2436 [GET_CONFIGURATION] = &scsi_disk_emulate_reqops,
2437 [GET_EVENT_STATUS_NOTIFICATION] = &scsi_disk_emulate_reqops,
2438 [MECHANISM_STATUS] = &scsi_disk_emulate_reqops,
2439 [SERVICE_ACTION_IN_16] = &scsi_disk_emulate_reqops,
2440 [REQUEST_SENSE] = &scsi_disk_emulate_reqops,
2441 [SYNCHRONIZE_CACHE] = &scsi_disk_emulate_reqops,
2442 [SEEK_10] = &scsi_disk_emulate_reqops,
2443 [MODE_SELECT] = &scsi_disk_emulate_reqops,
2444 [MODE_SELECT_10] = &scsi_disk_emulate_reqops,
2445 [UNMAP] = &scsi_disk_emulate_reqops,
2446 [WRITE_SAME_10] = &scsi_disk_emulate_reqops,
2447 [WRITE_SAME_16] = &scsi_disk_emulate_reqops,
2448 [VERIFY_10] = &scsi_disk_emulate_reqops,
2449 [VERIFY_12] = &scsi_disk_emulate_reqops,
2450 [VERIFY_16] = &scsi_disk_emulate_reqops,
2451
2452 [READ_6] = &scsi_disk_dma_reqops,
2453 [READ_10] = &scsi_disk_dma_reqops,
2454 [READ_12] = &scsi_disk_dma_reqops,
2455 [READ_16] = &scsi_disk_dma_reqops,
2456 [WRITE_6] = &scsi_disk_dma_reqops,
2457 [WRITE_10] = &scsi_disk_dma_reqops,
2458 [WRITE_12] = &scsi_disk_dma_reqops,
2459 [WRITE_16] = &scsi_disk_dma_reqops,
2460 [WRITE_VERIFY_10] = &scsi_disk_dma_reqops,
2461 [WRITE_VERIFY_12] = &scsi_disk_dma_reqops,
2462 [WRITE_VERIFY_16] = &scsi_disk_dma_reqops,
2463 };
2464
2465 static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun,
2466 uint8_t *buf, void *hba_private)
2467 {
2468 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d);
2469 SCSIRequest *req;
2470 const SCSIReqOps *ops;
2471 uint8_t command;
2472
2473 command = buf[0];
2474 ops = scsi_disk_reqops_dispatch[command];
2475 if (!ops) {
2476 ops = &scsi_disk_emulate_reqops;
2477 }
2478 req = scsi_req_alloc(ops, &s->qdev, tag, lun, hba_private);
2479
2480 #ifdef DEBUG_SCSI
2481 DPRINTF("Command: lun=%d tag=0x%x data=0x%02x", lun, tag, buf[0]);
2482 {
2483 int i;
2484 for (i = 1; i < scsi_cdb_length(buf); i++) {
2485 printf(" 0x%02x", buf[i]);
2486 }
2487 printf("\n");
2488 }
2489 #endif
2490
2491 return req;
2492 }
2493
2494 #ifdef __linux__
2495 static int get_device_type(SCSIDiskState *s)
2496 {
2497 uint8_t cmd[16];
2498 uint8_t buf[36];
2499 uint8_t sensebuf[8];
2500 sg_io_hdr_t io_header;
2501 int ret;
2502
2503 memset(cmd, 0, sizeof(cmd));
2504 memset(buf, 0, sizeof(buf));
2505 cmd[0] = INQUIRY;
2506 cmd[4] = sizeof(buf);
2507
2508 memset(&io_header, 0, sizeof(io_header));
2509 io_header.interface_id = 'S';
2510 io_header.dxfer_direction = SG_DXFER_FROM_DEV;
2511 io_header.dxfer_len = sizeof(buf);
2512 io_header.dxferp = buf;
2513 io_header.cmdp = cmd;
2514 io_header.cmd_len = sizeof(cmd);
2515 io_header.mx_sb_len = sizeof(sensebuf);
2516 io_header.sbp = sensebuf;
2517 io_header.timeout = 6000; /* XXX */
2518
2519 ret = blk_ioctl(s->qdev.conf.blk, SG_IO, &io_header);
2520 if (ret < 0 || io_header.driver_status || io_header.host_status) {
2521 return -1;
2522 }
2523 s->qdev.type = buf[0];
2524 if (buf[1] & 0x80) {
2525 s->features |= 1 << SCSI_DISK_F_REMOVABLE;
2526 }
2527 return 0;
2528 }
2529
2530 static void scsi_block_realize(SCSIDevice *dev, Error **errp)
2531 {
2532 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
2533 int sg_version;
2534 int rc;
2535
2536 if (!s->qdev.conf.blk) {
2537 error_setg(errp, "drive property not set");
2538 return;
2539 }
2540
2541 /* check we are using a driver managing SG_IO (version 3 and after) */
2542 rc = blk_ioctl(s->qdev.conf.blk, SG_GET_VERSION_NUM, &sg_version);
2543 if (rc < 0) {
2544 error_setg(errp, "cannot get SG_IO version number: %s. "
2545 "Is this a SCSI device?",
2546 strerror(-rc));
2547 return;
2548 }
2549 if (sg_version < 30000) {
2550 error_setg(errp, "scsi generic interface too old");
2551 return;
2552 }
2553
2554 /* get device type from INQUIRY data */
2555 rc = get_device_type(s);
2556 if (rc < 0) {
2557 error_setg(errp, "INQUIRY failed");
2558 return;
2559 }
2560
2561 /* Make a guess for the block size, we'll fix it when the guest sends.
2562 * READ CAPACITY. If they don't, they likely would assume these sizes
2563 * anyway. (TODO: check in /sys).
2564 */
2565 if (s->qdev.type == TYPE_ROM || s->qdev.type == TYPE_WORM) {
2566 s->qdev.blocksize = 2048;
2567 } else {
2568 s->qdev.blocksize = 512;
2569 }
2570
2571 /* Makes the scsi-block device not removable by using HMP and QMP eject
2572 * command.
2573 */
2574 s->features |= (1 << SCSI_DISK_F_NO_REMOVABLE_DEVOPS);
2575
2576 scsi_realize(&s->qdev, errp);
2577 scsi_generic_read_device_identification(&s->qdev);
2578 }
2579
2580 static bool scsi_block_is_passthrough(SCSIDiskState *s, uint8_t *buf)
2581 {
2582 switch (buf[0]) {
2583 case READ_6:
2584 case READ_10:
2585 case READ_12:
2586 case READ_16:
2587 case VERIFY_10:
2588 case VERIFY_12:
2589 case VERIFY_16:
2590 case WRITE_6:
2591 case WRITE_10:
2592 case WRITE_12:
2593 case WRITE_16:
2594 case WRITE_VERIFY_10:
2595 case WRITE_VERIFY_12:
2596 case WRITE_VERIFY_16:
2597 /* If we are not using O_DIRECT, we might read stale data from the
2598 * host cache if writes were made using other commands than these
2599 * ones (such as WRITE SAME or EXTENDED COPY, etc.). So, without
2600 * O_DIRECT everything must go through SG_IO.
2601 */
2602 if (!(blk_get_flags(s->qdev.conf.blk) & BDRV_O_NOCACHE)) {
2603 break;
2604 }
2605
2606 /* MMC writing cannot be done via pread/pwrite, because it sometimes
2607 * involves writing beyond the maximum LBA or to negative LBA (lead-in).
2608 * And once you do these writes, reading from the block device is
2609 * unreliable, too. It is even possible that reads deliver random data
2610 * from the host page cache (this is probably a Linux bug).
2611 *
2612 * We might use scsi_disk_dma_reqops as long as no writing commands are
2613 * seen, but performance usually isn't paramount on optical media. So,
2614 * just make scsi-block operate the same as scsi-generic for them.
2615 */
2616 if (s->qdev.type != TYPE_ROM) {
2617 return false;
2618 }
2619 break;
2620
2621 default:
2622 break;
2623 }
2624
2625 return true;
2626 }
2627
2628
2629 static SCSIRequest *scsi_block_new_request(SCSIDevice *d, uint32_t tag,
2630 uint32_t lun, uint8_t *buf,
2631 void *hba_private)
2632 {
2633 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d);
2634
2635 if (scsi_block_is_passthrough(s, buf)) {
2636 return scsi_req_alloc(&scsi_generic_req_ops, &s->qdev, tag, lun,
2637 hba_private);
2638 } else {
2639 return scsi_req_alloc(&scsi_disk_dma_reqops, &s->qdev, tag, lun,
2640 hba_private);
2641 }
2642 }
2643
2644 static int scsi_block_parse_cdb(SCSIDevice *d, SCSICommand *cmd,
2645 uint8_t *buf, void *hba_private)
2646 {
2647 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d);
2648
2649 if (scsi_block_is_passthrough(s, buf)) {
2650 return scsi_bus_parse_cdb(&s->qdev, cmd, buf, hba_private);
2651 } else {
2652 return scsi_req_parse_cdb(&s->qdev, cmd, buf);
2653 }
2654 }
2655
2656 #endif
2657
2658 #define DEFINE_SCSI_DISK_PROPERTIES() \
2659 DEFINE_BLOCK_PROPERTIES(SCSIDiskState, qdev.conf), \
2660 DEFINE_PROP_STRING("ver", SCSIDiskState, version), \
2661 DEFINE_PROP_STRING("serial", SCSIDiskState, serial), \
2662 DEFINE_PROP_STRING("vendor", SCSIDiskState, vendor), \
2663 DEFINE_PROP_STRING("product", SCSIDiskState, product)
2664
2665 static Property scsi_hd_properties[] = {
2666 DEFINE_SCSI_DISK_PROPERTIES(),
2667 DEFINE_PROP_BIT("removable", SCSIDiskState, features,
2668 SCSI_DISK_F_REMOVABLE, false),
2669 DEFINE_PROP_BIT("dpofua", SCSIDiskState, features,
2670 SCSI_DISK_F_DPOFUA, false),
2671 DEFINE_PROP_UINT64("wwn", SCSIDiskState, qdev.wwn, 0),
2672 DEFINE_PROP_UINT64("port_wwn", SCSIDiskState, qdev.port_wwn, 0),
2673 DEFINE_PROP_UINT16("port_index", SCSIDiskState, port_index, 0),
2674 DEFINE_PROP_UINT64("max_unmap_size", SCSIDiskState, max_unmap_size,
2675 DEFAULT_MAX_UNMAP_SIZE),
2676 DEFINE_PROP_UINT64("max_io_size", SCSIDiskState, max_io_size,
2677 DEFAULT_MAX_IO_SIZE),
2678 DEFINE_BLOCK_CHS_PROPERTIES(SCSIDiskState, qdev.conf),
2679 DEFINE_PROP_END_OF_LIST(),
2680 };
2681
2682 static const VMStateDescription vmstate_scsi_disk_state = {
2683 .name = "scsi-disk",
2684 .version_id = 1,
2685 .minimum_version_id = 1,
2686 .fields = (VMStateField[]) {
2687 VMSTATE_SCSI_DEVICE(qdev, SCSIDiskState),
2688 VMSTATE_BOOL(media_changed, SCSIDiskState),
2689 VMSTATE_BOOL(media_event, SCSIDiskState),
2690 VMSTATE_BOOL(eject_request, SCSIDiskState),
2691 VMSTATE_BOOL(tray_open, SCSIDiskState),
2692 VMSTATE_BOOL(tray_locked, SCSIDiskState),
2693 VMSTATE_END_OF_LIST()
2694 }
2695 };
2696
2697 static void scsi_hd_class_initfn(ObjectClass *klass, void *data)
2698 {
2699 DeviceClass *dc = DEVICE_CLASS(klass);
2700 SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass);
2701
2702 sc->realize = scsi_hd_realize;
2703 sc->alloc_req = scsi_new_request;
2704 sc->unit_attention_reported = scsi_disk_unit_attention_reported;
2705 dc->fw_name = "disk";
2706 dc->desc = "virtual SCSI disk";
2707 dc->reset = scsi_disk_reset;
2708 dc->props = scsi_hd_properties;
2709 dc->vmsd = &vmstate_scsi_disk_state;
2710 }
2711
2712 static const TypeInfo scsi_hd_info = {
2713 .name = "scsi-hd",
2714 .parent = TYPE_SCSI_DEVICE,
2715 .instance_size = sizeof(SCSIDiskState),
2716 .class_init = scsi_hd_class_initfn,
2717 };
2718
2719 static Property scsi_cd_properties[] = {
2720 DEFINE_SCSI_DISK_PROPERTIES(),
2721 DEFINE_PROP_UINT64("wwn", SCSIDiskState, qdev.wwn, 0),
2722 DEFINE_PROP_UINT64("port_wwn", SCSIDiskState, qdev.port_wwn, 0),
2723 DEFINE_PROP_UINT16("port_index", SCSIDiskState, port_index, 0),
2724 DEFINE_PROP_UINT64("max_io_size", SCSIDiskState, max_io_size,
2725 DEFAULT_MAX_IO_SIZE),
2726 DEFINE_PROP_END_OF_LIST(),
2727 };
2728
2729 static void scsi_cd_class_initfn(ObjectClass *klass, void *data)
2730 {
2731 DeviceClass *dc = DEVICE_CLASS(klass);
2732 SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass);
2733
2734 sc->realize = scsi_cd_realize;
2735 sc->alloc_req = scsi_new_request;
2736 sc->unit_attention_reported = scsi_disk_unit_attention_reported;
2737 dc->fw_name = "disk";
2738 dc->desc = "virtual SCSI CD-ROM";
2739 dc->reset = scsi_disk_reset;
2740 dc->props = scsi_cd_properties;
2741 dc->vmsd = &vmstate_scsi_disk_state;
2742 }
2743
2744 static const TypeInfo scsi_cd_info = {
2745 .name = "scsi-cd",
2746 .parent = TYPE_SCSI_DEVICE,
2747 .instance_size = sizeof(SCSIDiskState),
2748 .class_init = scsi_cd_class_initfn,
2749 };
2750
2751 #ifdef __linux__
2752 static Property scsi_block_properties[] = {
2753 DEFINE_PROP_DRIVE("drive", SCSIDiskState, qdev.conf.blk),
2754 DEFINE_PROP_END_OF_LIST(),
2755 };
2756
2757 static void scsi_block_class_initfn(ObjectClass *klass, void *data)
2758 {
2759 DeviceClass *dc = DEVICE_CLASS(klass);
2760 SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass);
2761
2762 sc->realize = scsi_block_realize;
2763 sc->alloc_req = scsi_block_new_request;
2764 sc->parse_cdb = scsi_block_parse_cdb;
2765 dc->fw_name = "disk";
2766 dc->desc = "SCSI block device passthrough";
2767 dc->reset = scsi_disk_reset;
2768 dc->props = scsi_block_properties;
2769 dc->vmsd = &vmstate_scsi_disk_state;
2770 }
2771
2772 static const TypeInfo scsi_block_info = {
2773 .name = "scsi-block",
2774 .parent = TYPE_SCSI_DEVICE,
2775 .instance_size = sizeof(SCSIDiskState),
2776 .class_init = scsi_block_class_initfn,
2777 };
2778 #endif
2779
2780 static Property scsi_disk_properties[] = {
2781 DEFINE_SCSI_DISK_PROPERTIES(),
2782 DEFINE_PROP_BIT("removable", SCSIDiskState, features,
2783 SCSI_DISK_F_REMOVABLE, false),
2784 DEFINE_PROP_BIT("dpofua", SCSIDiskState, features,
2785 SCSI_DISK_F_DPOFUA, false),
2786 DEFINE_PROP_UINT64("wwn", SCSIDiskState, qdev.wwn, 0),
2787 DEFINE_PROP_UINT64("port_wwn", SCSIDiskState, qdev.port_wwn, 0),
2788 DEFINE_PROP_UINT16("port_index", SCSIDiskState, port_index, 0),
2789 DEFINE_PROP_UINT64("max_unmap_size", SCSIDiskState, max_unmap_size,
2790 DEFAULT_MAX_UNMAP_SIZE),
2791 DEFINE_PROP_UINT64("max_io_size", SCSIDiskState, max_io_size,
2792 DEFAULT_MAX_IO_SIZE),
2793 DEFINE_PROP_END_OF_LIST(),
2794 };
2795
2796 static void scsi_disk_class_initfn(ObjectClass *klass, void *data)
2797 {
2798 DeviceClass *dc = DEVICE_CLASS(klass);
2799 SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass);
2800
2801 sc->realize = scsi_disk_realize;
2802 sc->alloc_req = scsi_new_request;
2803 sc->unit_attention_reported = scsi_disk_unit_attention_reported;
2804 dc->fw_name = "disk";
2805 dc->desc = "virtual SCSI disk or CD-ROM (legacy)";
2806 dc->reset = scsi_disk_reset;
2807 dc->props = scsi_disk_properties;
2808 dc->vmsd = &vmstate_scsi_disk_state;
2809 }
2810
2811 static const TypeInfo scsi_disk_info = {
2812 .name = "scsi-disk",
2813 .parent = TYPE_SCSI_DEVICE,
2814 .instance_size = sizeof(SCSIDiskState),
2815 .class_init = scsi_disk_class_initfn,
2816 };
2817
2818 static void scsi_disk_register_types(void)
2819 {
2820 type_register_static(&scsi_hd_info);
2821 type_register_static(&scsi_cd_info);
2822 #ifdef __linux__
2823 type_register_static(&scsi_block_info);
2824 #endif
2825 type_register_static(&scsi_disk_info);
2826 }
2827
2828 type_init(scsi_disk_register_types)
AR7 emulation for QEMU