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scsi/scsi-disk: Remove redundant statement in scsi_disk_emulate_command()
[qemu/ar7.git] / hw / scsi / scsi-disk.c
blob1c0cb63a6fe05fc643ad68d2137be284e2bb4948
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 "hw/scsi/scsi.h"
29 #include "migration/qemu-file-types.h"
30 #include "migration/vmstate.h"
31 #include "hw/scsi/emulation.h"
32 #include "scsi/constants.h"
33 #include "sysemu/block-backend.h"
34 #include "sysemu/blockdev.h"
35 #include "hw/block/block.h"
36 #include "hw/qdev-properties.h"
37 #include "sysemu/dma.h"
38 #include "sysemu/sysemu.h"
39 #include "qemu/cutils.h"
40 #include "trace.h"
41
42 #ifdef __linux
43 #include <scsi/sg.h>
44 #endif
45
46 #define SCSI_WRITE_SAME_MAX (512 * KiB)
47 #define SCSI_DMA_BUF_SIZE (128 * KiB)
48 #define SCSI_MAX_INQUIRY_LEN 256
49 #define SCSI_MAX_MODE_LEN 256
50
51 #define DEFAULT_DISCARD_GRANULARITY (4 * KiB)
52 #define DEFAULT_MAX_UNMAP_SIZE (1 * GiB)
53 #define DEFAULT_MAX_IO_SIZE INT_MAX /* 2 GB - 1 block */
54
55 #define TYPE_SCSI_DISK_BASE "scsi-disk-base"
56
57 #define SCSI_DISK_BASE(obj) \
58 OBJECT_CHECK(SCSIDiskState, (obj), TYPE_SCSI_DISK_BASE)
59 #define SCSI_DISK_BASE_CLASS(klass) \
60 OBJECT_CLASS_CHECK(SCSIDiskClass, (klass), TYPE_SCSI_DISK_BASE)
61 #define SCSI_DISK_BASE_GET_CLASS(obj) \
62 OBJECT_GET_CLASS(SCSIDiskClass, (obj), TYPE_SCSI_DISK_BASE)
63
64 typedef struct SCSIDiskClass {
65 SCSIDeviceClass parent_class;
66 DMAIOFunc *dma_readv;
67 DMAIOFunc *dma_writev;
68 bool (*need_fua_emulation)(SCSICommand *cmd);
69 void (*update_sense)(SCSIRequest *r);
70 } SCSIDiskClass;
71
72 typedef struct SCSIDiskReq {
73 SCSIRequest req;
74 /* Both sector and sector_count are in terms of qemu 512 byte blocks. */
75 uint64_t sector;
76 uint32_t sector_count;
77 uint32_t buflen;
78 bool started;
79 bool need_fua_emulation;
80 struct iovec iov;
81 QEMUIOVector qiov;
82 BlockAcctCookie acct;
83 unsigned char *status;
84 } SCSIDiskReq;
85
86 #define SCSI_DISK_F_REMOVABLE 0
87 #define SCSI_DISK_F_DPOFUA 1
88 #define SCSI_DISK_F_NO_REMOVABLE_DEVOPS 2
89
90 typedef struct SCSIDiskState
91 {
92 SCSIDevice qdev;
93 uint32_t features;
94 bool media_changed;
95 bool media_event;
96 bool eject_request;
97 uint16_t port_index;
98 uint64_t max_unmap_size;
99 uint64_t max_io_size;
100 QEMUBH *bh;
101 char *version;
102 char *serial;
103 char *vendor;
104 char *product;
105 char *device_id;
106 bool tray_open;
107 bool tray_locked;
108 /*
109 * 0x0000 - rotation rate not reported
110 * 0x0001 - non-rotating medium (SSD)
111 * 0x0002-0x0400 - reserved
112 * 0x0401-0xffe - rotations per minute
113 * 0xffff - reserved
114 */
115 uint16_t rotation_rate;
116 } SCSIDiskState;
117
118 static bool scsi_handle_rw_error(SCSIDiskReq *r, int error, bool acct_failed);
119
120 static void scsi_free_request(SCSIRequest *req)
121 {
122 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
123
124 qemu_vfree(r->iov.iov_base);
125 }
126
127 /* Helper function for command completion with sense. */
128 static void scsi_check_condition(SCSIDiskReq *r, SCSISense sense)
129 {
130 trace_scsi_disk_check_condition(r->req.tag, sense.key, sense.asc,
131 sense.ascq);
132 scsi_req_build_sense(&r->req, sense);
133 scsi_req_complete(&r->req, CHECK_CONDITION);
134 }
135
136 static void scsi_init_iovec(SCSIDiskReq *r, size_t size)
137 {
138 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
139
140 if (!r->iov.iov_base) {
141 r->buflen = size;
142 r->iov.iov_base = blk_blockalign(s->qdev.conf.blk, r->buflen);
143 }
144 r->iov.iov_len = MIN(r->sector_count * 512, r->buflen);
145 qemu_iovec_init_external(&r->qiov, &r->iov, 1);
146 }
147
148 static void scsi_disk_save_request(QEMUFile *f, SCSIRequest *req)
149 {
150 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
151
152 qemu_put_be64s(f, &r->sector);
153 qemu_put_be32s(f, &r->sector_count);
154 qemu_put_be32s(f, &r->buflen);
155 if (r->buflen) {
156 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
157 qemu_put_buffer(f, r->iov.iov_base, r->iov.iov_len);
158 } else if (!req->retry) {
159 uint32_t len = r->iov.iov_len;
160 qemu_put_be32s(f, &len);
161 qemu_put_buffer(f, r->iov.iov_base, r->iov.iov_len);
162 }
163 }
164 }
165
166 static void scsi_disk_load_request(QEMUFile *f, SCSIRequest *req)
167 {
168 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
169
170 qemu_get_be64s(f, &r->sector);
171 qemu_get_be32s(f, &r->sector_count);
172 qemu_get_be32s(f, &r->buflen);
173 if (r->buflen) {
174 scsi_init_iovec(r, r->buflen);
175 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
176 qemu_get_buffer(f, r->iov.iov_base, r->iov.iov_len);
177 } else if (!r->req.retry) {
178 uint32_t len;
179 qemu_get_be32s(f, &len);
180 r->iov.iov_len = len;
181 assert(r->iov.iov_len <= r->buflen);
182 qemu_get_buffer(f, r->iov.iov_base, r->iov.iov_len);
183 }
184 }
185
186 qemu_iovec_init_external(&r->qiov, &r->iov, 1);
187 }
188
189 static bool scsi_disk_req_check_error(SCSIDiskReq *r, int ret, bool acct_failed)
190 {
191 if (r->req.io_canceled) {
192 scsi_req_cancel_complete(&r->req);
193 return true;
194 }
195
196 if (ret < 0 || (r->status && *r->status)) {
197 return scsi_handle_rw_error(r, -ret, acct_failed);
198 }
199
200 return false;
201 }
202
203 static void scsi_aio_complete(void *opaque, int ret)
204 {
205 SCSIDiskReq *r = (SCSIDiskReq *)opaque;
206 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
207
208 assert(r->req.aiocb != NULL);
209 r->req.aiocb = NULL;
210 aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
211 if (scsi_disk_req_check_error(r, ret, true)) {
212 goto done;
213 }
214
215 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct);
216 scsi_req_complete(&r->req, GOOD);
217
218 done:
219 aio_context_release(blk_get_aio_context(s->qdev.conf.blk));
220 scsi_req_unref(&r->req);
221 }
222
223 static bool scsi_is_cmd_fua(SCSICommand *cmd)
224 {
225 switch (cmd->buf[0]) {
226 case READ_10:
227 case READ_12:
228 case READ_16:
229 case WRITE_10:
230 case WRITE_12:
231 case WRITE_16:
232 return (cmd->buf[1] & 8) != 0;
233
234 case VERIFY_10:
235 case VERIFY_12:
236 case VERIFY_16:
237 case WRITE_VERIFY_10:
238 case WRITE_VERIFY_12:
239 case WRITE_VERIFY_16:
240 return true;
241
242 case READ_6:
243 case WRITE_6:
244 default:
245 return false;
246 }
247 }
248
249 static void scsi_write_do_fua(SCSIDiskReq *r)
250 {
251 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
252
253 assert(r->req.aiocb == NULL);
254 assert(!r->req.io_canceled);
255
256 if (r->need_fua_emulation) {
257 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 0,
258 BLOCK_ACCT_FLUSH);
259 r->req.aiocb = blk_aio_flush(s->qdev.conf.blk, scsi_aio_complete, r);
260 return;
261 }
262
263 scsi_req_complete(&r->req, GOOD);
264 scsi_req_unref(&r->req);
265 }
266
267 static void scsi_dma_complete_noio(SCSIDiskReq *r, int ret)
268 {
269 assert(r->req.aiocb == NULL);
270 if (scsi_disk_req_check_error(r, ret, false)) {
271 goto done;
272 }
273
274 r->sector += r->sector_count;
275 r->sector_count = 0;
276 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
277 scsi_write_do_fua(r);
278 return;
279 } else {
280 scsi_req_complete(&r->req, GOOD);
281 }
282
283 done:
284 scsi_req_unref(&r->req);
285 }
286
287 static void scsi_dma_complete(void *opaque, int ret)
288 {
289 SCSIDiskReq *r = (SCSIDiskReq *)opaque;
290 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
291
292 assert(r->req.aiocb != NULL);
293 r->req.aiocb = NULL;
294
295 aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
296 if (ret < 0) {
297 block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct);
298 } else {
299 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct);
300 }
301 scsi_dma_complete_noio(r, ret);
302 aio_context_release(blk_get_aio_context(s->qdev.conf.blk));
303 }
304
305 static void scsi_read_complete_noio(SCSIDiskReq *r, int ret)
306 {
307 uint32_t n;
308
309 assert(r->req.aiocb == NULL);
310 if (scsi_disk_req_check_error(r, ret, false)) {
311 goto done;
312 }
313
314 n = r->qiov.size / 512;
315 r->sector += n;
316 r->sector_count -= n;
317 scsi_req_data(&r->req, r->qiov.size);
318
319 done:
320 scsi_req_unref(&r->req);
321 }
322
323 static void scsi_read_complete(void *opaque, int ret)
324 {
325 SCSIDiskReq *r = (SCSIDiskReq *)opaque;
326 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
327
328 assert(r->req.aiocb != NULL);
329 r->req.aiocb = NULL;
330
331 aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
332 if (ret < 0) {
333 block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct);
334 } else {
335 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct);
336 trace_scsi_disk_read_complete(r->req.tag, r->qiov.size);
337 }
338 scsi_read_complete_noio(r, ret);
339 aio_context_release(blk_get_aio_context(s->qdev.conf.blk));
340 }
341
342 /* Actually issue a read to the block device. */
343 static void scsi_do_read(SCSIDiskReq *r, int ret)
344 {
345 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
346 SCSIDiskClass *sdc = (SCSIDiskClass *) object_get_class(OBJECT(s));
347
348 assert (r->req.aiocb == NULL);
349 if (scsi_disk_req_check_error(r, ret, false)) {
350 goto done;
351 }
352
353 /* The request is used as the AIO opaque value, so add a ref. */
354 scsi_req_ref(&r->req);
355
356 if (r->req.sg) {
357 dma_acct_start(s->qdev.conf.blk, &r->acct, r->req.sg, BLOCK_ACCT_READ);
358 r->req.resid -= r->req.sg->size;
359 r->req.aiocb = dma_blk_io(blk_get_aio_context(s->qdev.conf.blk),
360 r->req.sg, r->sector << BDRV_SECTOR_BITS,
361 BDRV_SECTOR_SIZE,
362 sdc->dma_readv, r, scsi_dma_complete, r,
363 DMA_DIRECTION_FROM_DEVICE);
364 } else {
365 scsi_init_iovec(r, SCSI_DMA_BUF_SIZE);
366 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct,
367 r->qiov.size, BLOCK_ACCT_READ);
368 r->req.aiocb = sdc->dma_readv(r->sector << BDRV_SECTOR_BITS, &r->qiov,
369 scsi_read_complete, r, r);
370 }
371
372 done:
373 scsi_req_unref(&r->req);
374 }
375
376 static void scsi_do_read_cb(void *opaque, int ret)
377 {
378 SCSIDiskReq *r = (SCSIDiskReq *)opaque;
379 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
380
381 assert (r->req.aiocb != NULL);
382 r->req.aiocb = NULL;
383
384 aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
385 if (ret < 0) {
386 block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct);
387 } else {
388 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct);
389 }
390 scsi_do_read(opaque, ret);
391 aio_context_release(blk_get_aio_context(s->qdev.conf.blk));
392 }
393
394 /* Read more data from scsi device into buffer. */
395 static void scsi_read_data(SCSIRequest *req)
396 {
397 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
398 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
399 bool first;
400
401 trace_scsi_disk_read_data_count(r->sector_count);
402 if (r->sector_count == 0) {
403 /* This also clears the sense buffer for REQUEST SENSE. */
404 scsi_req_complete(&r->req, GOOD);
405 return;
406 }
407
408 /* No data transfer may already be in progress */
409 assert(r->req.aiocb == NULL);
410
411 /* The request is used as the AIO opaque value, so add a ref. */
412 scsi_req_ref(&r->req);
413 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
414 trace_scsi_disk_read_data_invalid();
415 scsi_read_complete_noio(r, -EINVAL);
416 return;
417 }
418
419 if (!blk_is_available(req->dev->conf.blk)) {
420 scsi_read_complete_noio(r, -ENOMEDIUM);
421 return;
422 }
423
424 first = !r->started;
425 r->started = true;
426 if (first && r->need_fua_emulation) {
427 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 0,
428 BLOCK_ACCT_FLUSH);
429 r->req.aiocb = blk_aio_flush(s->qdev.conf.blk, scsi_do_read_cb, r);
430 } else {
431 scsi_do_read(r, 0);
432 }
433 }
434
435 /*
436 * scsi_handle_rw_error has two return values. False means that the error
437 * must be ignored, true means that the error has been processed and the
438 * caller should not do anything else for this request. Note that
439 * scsi_handle_rw_error always manages its reference counts, independent
440 * of the return value.
441 */
442 static bool scsi_handle_rw_error(SCSIDiskReq *r, int error, bool acct_failed)
443 {
444 bool is_read = (r->req.cmd.mode == SCSI_XFER_FROM_DEV);
445 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
446 SCSIDiskClass *sdc = (SCSIDiskClass *) object_get_class(OBJECT(s));
447 BlockErrorAction action = blk_get_error_action(s->qdev.conf.blk,
448 is_read, error);
449
450 if (action == BLOCK_ERROR_ACTION_REPORT) {
451 if (acct_failed) {
452 block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct);
453 }
454 switch (error) {
455 case 0:
456 /* A passthrough command has run and has produced sense data; check
457 * whether the error has to be handled by the guest or should rather
458 * pause the host.
459 */
460 assert(r->status && *r->status);
461 if (scsi_sense_buf_is_guest_recoverable(r->req.sense, sizeof(r->req.sense))) {
462 /* These errors are handled by guest. */
463 sdc->update_sense(&r->req);
464 scsi_req_complete(&r->req, *r->status);
465 return true;
466 }
467 error = scsi_sense_buf_to_errno(r->req.sense, sizeof(r->req.sense));
468 break;
469 case ENOMEDIUM:
470 scsi_check_condition(r, SENSE_CODE(NO_MEDIUM));
471 break;
472 case ENOMEM:
473 scsi_check_condition(r, SENSE_CODE(TARGET_FAILURE));
474 break;
475 case EINVAL:
476 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
477 break;
478 case ENOSPC:
479 scsi_check_condition(r, SENSE_CODE(SPACE_ALLOC_FAILED));
480 break;
481 default:
482 scsi_check_condition(r, SENSE_CODE(IO_ERROR));
483 break;
484 }
485 }
486
487 blk_error_action(s->qdev.conf.blk, action, is_read, error);
488 if (action == BLOCK_ERROR_ACTION_IGNORE) {
489 scsi_req_complete(&r->req, 0);
490 return true;
491 }
492
493 if (action == BLOCK_ERROR_ACTION_STOP) {
494 scsi_req_retry(&r->req);
495 }
496 return true;
497 }
498
499 static void scsi_write_complete_noio(SCSIDiskReq *r, int ret)
500 {
501 uint32_t n;
502
503 assert (r->req.aiocb == NULL);
504 if (scsi_disk_req_check_error(r, ret, false)) {
505 goto done;
506 }
507
508 n = r->qiov.size / 512;
509 r->sector += n;
510 r->sector_count -= n;
511 if (r->sector_count == 0) {
512 scsi_write_do_fua(r);
513 return;
514 } else {
515 scsi_init_iovec(r, SCSI_DMA_BUF_SIZE);
516 trace_scsi_disk_write_complete_noio(r->req.tag, r->qiov.size);
517 scsi_req_data(&r->req, r->qiov.size);
518 }
519
520 done:
521 scsi_req_unref(&r->req);
522 }
523
524 static void scsi_write_complete(void * opaque, int ret)
525 {
526 SCSIDiskReq *r = (SCSIDiskReq *)opaque;
527 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
528
529 assert (r->req.aiocb != NULL);
530 r->req.aiocb = NULL;
531
532 aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
533 if (ret < 0) {
534 block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct);
535 } else {
536 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct);
537 }
538 scsi_write_complete_noio(r, ret);
539 aio_context_release(blk_get_aio_context(s->qdev.conf.blk));
540 }
541
542 static void scsi_write_data(SCSIRequest *req)
543 {
544 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
545 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
546 SCSIDiskClass *sdc = (SCSIDiskClass *) object_get_class(OBJECT(s));
547
548 /* No data transfer may already be in progress */
549 assert(r->req.aiocb == NULL);
550
551 /* The request is used as the AIO opaque value, so add a ref. */
552 scsi_req_ref(&r->req);
553 if (r->req.cmd.mode != SCSI_XFER_TO_DEV) {
554 trace_scsi_disk_write_data_invalid();
555 scsi_write_complete_noio(r, -EINVAL);
556 return;
557 }
558
559 if (!r->req.sg && !r->qiov.size) {
560 /* Called for the first time. Ask the driver to send us more data. */
561 r->started = true;
562 scsi_write_complete_noio(r, 0);
563 return;
564 }
565 if (!blk_is_available(req->dev->conf.blk)) {
566 scsi_write_complete_noio(r, -ENOMEDIUM);
567 return;
568 }
569
570 if (r->req.cmd.buf[0] == VERIFY_10 || r->req.cmd.buf[0] == VERIFY_12 ||
571 r->req.cmd.buf[0] == VERIFY_16) {
572 if (r->req.sg) {
573 scsi_dma_complete_noio(r, 0);
574 } else {
575 scsi_write_complete_noio(r, 0);
576 }
577 return;
578 }
579
580 if (r->req.sg) {
581 dma_acct_start(s->qdev.conf.blk, &r->acct, r->req.sg, BLOCK_ACCT_WRITE);
582 r->req.resid -= r->req.sg->size;
583 r->req.aiocb = dma_blk_io(blk_get_aio_context(s->qdev.conf.blk),
584 r->req.sg, r->sector << BDRV_SECTOR_BITS,
585 BDRV_SECTOR_SIZE,
586 sdc->dma_writev, r, scsi_dma_complete, r,
587 DMA_DIRECTION_TO_DEVICE);
588 } else {
589 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct,
590 r->qiov.size, BLOCK_ACCT_WRITE);
591 r->req.aiocb = sdc->dma_writev(r->sector << BDRV_SECTOR_BITS, &r->qiov,
592 scsi_write_complete, r, r);
593 }
594 }
595
596 /* Return a pointer to the data buffer. */
597 static uint8_t *scsi_get_buf(SCSIRequest *req)
598 {
599 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
600
601 return (uint8_t *)r->iov.iov_base;
602 }
603
604 static int scsi_disk_emulate_vpd_page(SCSIRequest *req, uint8_t *outbuf)
605 {
606 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
607 uint8_t page_code = req->cmd.buf[2];
608 int start, buflen = 0;
609
610 outbuf[buflen++] = s->qdev.type & 0x1f;
611 outbuf[buflen++] = page_code;
612 outbuf[buflen++] = 0x00;
613 outbuf[buflen++] = 0x00;
614 start = buflen;
615
616 switch (page_code) {
617 case 0x00: /* Supported page codes, mandatory */
618 {
619 trace_scsi_disk_emulate_vpd_page_00(req->cmd.xfer);
620 outbuf[buflen++] = 0x00; /* list of supported pages (this page) */
621 if (s->serial) {
622 outbuf[buflen++] = 0x80; /* unit serial number */
623 }
624 outbuf[buflen++] = 0x83; /* device identification */
625 if (s->qdev.type == TYPE_DISK) {
626 outbuf[buflen++] = 0xb0; /* block limits */
627 outbuf[buflen++] = 0xb1; /* block device characteristics */
628 outbuf[buflen++] = 0xb2; /* thin provisioning */
629 }
630 break;
631 }
632 case 0x80: /* Device serial number, optional */
633 {
634 int l;
635
636 if (!s->serial) {
637 trace_scsi_disk_emulate_vpd_page_80_not_supported();
638 return -1;
639 }
640
641 l = strlen(s->serial);
642 if (l > 36) {
643 l = 36;
644 }
645
646 trace_scsi_disk_emulate_vpd_page_80(req->cmd.xfer);
647 memcpy(outbuf + buflen, s->serial, l);
648 buflen += l;
649 break;
650 }
651
652 case 0x83: /* Device identification page, mandatory */
653 {
654 int id_len = s->device_id ? MIN(strlen(s->device_id), 255 - 8) : 0;
655
656 trace_scsi_disk_emulate_vpd_page_83(req->cmd.xfer);
657
658 if (id_len) {
659 outbuf[buflen++] = 0x2; /* ASCII */
660 outbuf[buflen++] = 0; /* not officially assigned */
661 outbuf[buflen++] = 0; /* reserved */
662 outbuf[buflen++] = id_len; /* length of data following */
663 memcpy(outbuf + buflen, s->device_id, id_len);
664 buflen += id_len;
665 }
666
667 if (s->qdev.wwn) {
668 outbuf[buflen++] = 0x1; /* Binary */
669 outbuf[buflen++] = 0x3; /* NAA */
670 outbuf[buflen++] = 0; /* reserved */
671 outbuf[buflen++] = 8;
672 stq_be_p(&outbuf[buflen], s->qdev.wwn);
673 buflen += 8;
674 }
675
676 if (s->qdev.port_wwn) {
677 outbuf[buflen++] = 0x61; /* SAS / Binary */
678 outbuf[buflen++] = 0x93; /* PIV / Target port / NAA */
679 outbuf[buflen++] = 0; /* reserved */
680 outbuf[buflen++] = 8;
681 stq_be_p(&outbuf[buflen], s->qdev.port_wwn);
682 buflen += 8;
683 }
684
685 if (s->port_index) {
686 outbuf[buflen++] = 0x61; /* SAS / Binary */
687
688 /* PIV/Target port/relative target port */
689 outbuf[buflen++] = 0x94;
690
691 outbuf[buflen++] = 0; /* reserved */
692 outbuf[buflen++] = 4;
693 stw_be_p(&outbuf[buflen + 2], s->port_index);
694 buflen += 4;
695 }
696 break;
697 }
698 case 0xb0: /* block limits */
699 {
700 SCSIBlockLimits bl = {};
701
702 if (s->qdev.type == TYPE_ROM) {
703 trace_scsi_disk_emulate_vpd_page_b0_not_supported();
704 return -1;
705 }
706 bl.wsnz = 1;
707 bl.unmap_sectors =
708 s->qdev.conf.discard_granularity / s->qdev.blocksize;
709 bl.min_io_size =
710 s->qdev.conf.min_io_size / s->qdev.blocksize;
711 bl.opt_io_size =
712 s->qdev.conf.opt_io_size / s->qdev.blocksize;
713 bl.max_unmap_sectors =
714 s->max_unmap_size / s->qdev.blocksize;
715 bl.max_io_sectors =
716 s->max_io_size / s->qdev.blocksize;
717 /* 255 descriptors fit in 4 KiB with an 8-byte header */
718 bl.max_unmap_descr = 255;
719
720 if (s->qdev.type == TYPE_DISK) {
721 int max_transfer_blk = blk_get_max_transfer(s->qdev.conf.blk);
722 int max_io_sectors_blk =
723 max_transfer_blk / s->qdev.blocksize;
724
725 bl.max_io_sectors =
726 MIN_NON_ZERO(max_io_sectors_blk, bl.max_io_sectors);
727 }
728 buflen += scsi_emulate_block_limits(outbuf + buflen, &bl);
729 break;
730 }
731 case 0xb1: /* block device characteristics */
732 {
733 buflen = 0x40;
734 outbuf[4] = (s->rotation_rate >> 8) & 0xff;
735 outbuf[5] = s->rotation_rate & 0xff;
736 outbuf[6] = 0; /* PRODUCT TYPE */
737 outbuf[7] = 0; /* WABEREQ | WACEREQ | NOMINAL FORM FACTOR */
738 outbuf[8] = 0; /* VBULS */
739 break;
740 }
741 case 0xb2: /* thin provisioning */
742 {
743 buflen = 8;
744 outbuf[4] = 0;
745 outbuf[5] = 0xe0; /* unmap & write_same 10/16 all supported */
746 outbuf[6] = s->qdev.conf.discard_granularity ? 2 : 1;
747 outbuf[7] = 0;
748 break;
749 }
750 default:
751 return -1;
752 }
753 /* done with EVPD */
754 assert(buflen - start <= 255);
755 outbuf[start - 1] = buflen - start;
756 return buflen;
757 }
758
759 static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf)
760 {
761 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
762 int buflen = 0;
763
764 if (req->cmd.buf[1] & 0x1) {
765 /* Vital product data */
766 return scsi_disk_emulate_vpd_page(req, outbuf);
767 }
768
769 /* Standard INQUIRY data */
770 if (req->cmd.buf[2] != 0) {
771 return -1;
772 }
773
774 /* PAGE CODE == 0 */
775 buflen = req->cmd.xfer;
776 if (buflen > SCSI_MAX_INQUIRY_LEN) {
777 buflen = SCSI_MAX_INQUIRY_LEN;
778 }
779
780 outbuf[0] = s->qdev.type & 0x1f;
781 outbuf[1] = (s->features & (1 << SCSI_DISK_F_REMOVABLE)) ? 0x80 : 0;
782
783 strpadcpy((char *) &outbuf[16], 16, s->product, ' ');
784 strpadcpy((char *) &outbuf[8], 8, s->vendor, ' ');
785
786 memset(&outbuf[32], 0, 4);
787 memcpy(&outbuf[32], s->version, MIN(4, strlen(s->version)));
788 /*
789 * We claim conformance to SPC-3, which is required for guests
790 * to ask for modern features like READ CAPACITY(16) or the
791 * block characteristics VPD page by default. Not all of SPC-3
792 * is actually implemented, but we're good enough.
793 */
794 outbuf[2] = s->qdev.default_scsi_version;
795 outbuf[3] = 2 | 0x10; /* Format 2, HiSup */
796
797 if (buflen > 36) {
798 outbuf[4] = buflen - 5; /* Additional Length = (Len - 1) - 4 */
799 } else {
800 /* If the allocation length of CDB is too small,
801 the additional length is not adjusted */
802 outbuf[4] = 36 - 5;
803 }
804
805 /* Sync data transfer and TCQ. */
806 outbuf[7] = 0x10 | (req->bus->info->tcq ? 0x02 : 0);
807 return buflen;
808 }
809
810 static inline bool media_is_dvd(SCSIDiskState *s)
811 {
812 uint64_t nb_sectors;
813 if (s->qdev.type != TYPE_ROM) {
814 return false;
815 }
816 if (!blk_is_available(s->qdev.conf.blk)) {
817 return false;
818 }
819 blk_get_geometry(s->qdev.conf.blk, &nb_sectors);
820 return nb_sectors > CD_MAX_SECTORS;
821 }
822
823 static inline bool media_is_cd(SCSIDiskState *s)
824 {
825 uint64_t nb_sectors;
826 if (s->qdev.type != TYPE_ROM) {
827 return false;
828 }
829 if (!blk_is_available(s->qdev.conf.blk)) {
830 return false;
831 }
832 blk_get_geometry(s->qdev.conf.blk, &nb_sectors);
833 return nb_sectors <= CD_MAX_SECTORS;
834 }
835
836 static int scsi_read_disc_information(SCSIDiskState *s, SCSIDiskReq *r,
837 uint8_t *outbuf)
838 {
839 uint8_t type = r->req.cmd.buf[1] & 7;
840
841 if (s->qdev.type != TYPE_ROM) {
842 return -1;
843 }
844
845 /* Types 1/2 are only defined for Blu-Ray. */
846 if (type != 0) {
847 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
848 return -1;
849 }
850
851 memset(outbuf, 0, 34);
852 outbuf[1] = 32;
853 outbuf[2] = 0xe; /* last session complete, disc finalized */
854 outbuf[3] = 1; /* first track on disc */
855 outbuf[4] = 1; /* # of sessions */
856 outbuf[5] = 1; /* first track of last session */
857 outbuf[6] = 1; /* last track of last session */
858 outbuf[7] = 0x20; /* unrestricted use */
859 outbuf[8] = 0x00; /* CD-ROM or DVD-ROM */
860 /* 9-10-11: most significant byte corresponding bytes 4-5-6 */
861 /* 12-23: not meaningful for CD-ROM or DVD-ROM */
862 /* 24-31: disc bar code */
863 /* 32: disc application code */
864 /* 33: number of OPC tables */
865
866 return 34;
867 }
868
869 static int scsi_read_dvd_structure(SCSIDiskState *s, SCSIDiskReq *r,
870 uint8_t *outbuf)
871 {
872 static const int rds_caps_size[5] = {
873 [0] = 2048 + 4,
874 [1] = 4 + 4,
875 [3] = 188 + 4,
876 [4] = 2048 + 4,
877 };
878
879 uint8_t media = r->req.cmd.buf[1];
880 uint8_t layer = r->req.cmd.buf[6];
881 uint8_t format = r->req.cmd.buf[7];
882 int size = -1;
883
884 if (s->qdev.type != TYPE_ROM) {
885 return -1;
886 }
887 if (media != 0) {
888 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
889 return -1;
890 }
891
892 if (format != 0xff) {
893 if (!blk_is_available(s->qdev.conf.blk)) {
894 scsi_check_condition(r, SENSE_CODE(NO_MEDIUM));
895 return -1;
896 }
897 if (media_is_cd(s)) {
898 scsi_check_condition(r, SENSE_CODE(INCOMPATIBLE_FORMAT));
899 return -1;
900 }
901 if (format >= ARRAY_SIZE(rds_caps_size)) {
902 return -1;
903 }
904 size = rds_caps_size[format];
905 memset(outbuf, 0, size);
906 }
907
908 switch (format) {
909 case 0x00: {
910 /* Physical format information */
911 uint64_t nb_sectors;
912 if (layer != 0) {
913 goto fail;
914 }
915 blk_get_geometry(s->qdev.conf.blk, &nb_sectors);
916
917 outbuf[4] = 1; /* DVD-ROM, part version 1 */
918 outbuf[5] = 0xf; /* 120mm disc, minimum rate unspecified */
919 outbuf[6] = 1; /* one layer, read-only (per MMC-2 spec) */
920 outbuf[7] = 0; /* default densities */
921
922 stl_be_p(&outbuf[12], (nb_sectors >> 2) - 1); /* end sector */
923 stl_be_p(&outbuf[16], (nb_sectors >> 2) - 1); /* l0 end sector */
924 break;
925 }
926
927 case 0x01: /* DVD copyright information, all zeros */
928 break;
929
930 case 0x03: /* BCA information - invalid field for no BCA info */
931 return -1;
932
933 case 0x04: /* DVD disc manufacturing information, all zeros */
934 break;
935
936 case 0xff: { /* List capabilities */
937 int i;
938 size = 4;
939 for (i = 0; i < ARRAY_SIZE(rds_caps_size); i++) {
940 if (!rds_caps_size[i]) {
941 continue;
942 }
943 outbuf[size] = i;
944 outbuf[size + 1] = 0x40; /* Not writable, readable */
945 stw_be_p(&outbuf[size + 2], rds_caps_size[i]);
946 size += 4;
947 }
948 break;
949 }
950
951 default:
952 return -1;
953 }
954
955 /* Size of buffer, not including 2 byte size field */
956 stw_be_p(outbuf, size - 2);
957 return size;
958
959 fail:
960 return -1;
961 }
962
963 static int scsi_event_status_media(SCSIDiskState *s, uint8_t *outbuf)
964 {
965 uint8_t event_code, media_status;
966
967 media_status = 0;
968 if (s->tray_open) {
969 media_status = MS_TRAY_OPEN;
970 } else if (blk_is_inserted(s->qdev.conf.blk)) {
971 media_status = MS_MEDIA_PRESENT;
972 }
973
974 /* Event notification descriptor */
975 event_code = MEC_NO_CHANGE;
976 if (media_status != MS_TRAY_OPEN) {
977 if (s->media_event) {
978 event_code = MEC_NEW_MEDIA;
979 s->media_event = false;
980 } else if (s->eject_request) {
981 event_code = MEC_EJECT_REQUESTED;
982 s->eject_request = false;
983 }
984 }
985
986 outbuf[0] = event_code;
987 outbuf[1] = media_status;
988
989 /* These fields are reserved, just clear them. */
990 outbuf[2] = 0;
991 outbuf[3] = 0;
992 return 4;
993 }
994
995 static int scsi_get_event_status_notification(SCSIDiskState *s, SCSIDiskReq *r,
996 uint8_t *outbuf)
997 {
998 int size;
999 uint8_t *buf = r->req.cmd.buf;
1000 uint8_t notification_class_request = buf[4];
1001 if (s->qdev.type != TYPE_ROM) {
1002 return -1;
1003 }
1004 if ((buf[1] & 1) == 0) {
1005 /* asynchronous */
1006 return -1;
1007 }
1008
1009 size = 4;
1010 outbuf[0] = outbuf[1] = 0;
1011 outbuf[3] = 1 << GESN_MEDIA; /* supported events */
1012 if (notification_class_request & (1 << GESN_MEDIA)) {
1013 outbuf[2] = GESN_MEDIA;
1014 size += scsi_event_status_media(s, &outbuf[size]);
1015 } else {
1016 outbuf[2] = 0x80;
1017 }
1018 stw_be_p(outbuf, size - 4);
1019 return size;
1020 }
1021
1022 static int scsi_get_configuration(SCSIDiskState *s, uint8_t *outbuf)
1023 {
1024 int current;
1025
1026 if (s->qdev.type != TYPE_ROM) {
1027 return -1;
1028 }
1029
1030 if (media_is_dvd(s)) {
1031 current = MMC_PROFILE_DVD_ROM;
1032 } else if (media_is_cd(s)) {
1033 current = MMC_PROFILE_CD_ROM;
1034 } else {
1035 current = MMC_PROFILE_NONE;
1036 }
1037
1038 memset(outbuf, 0, 40);
1039 stl_be_p(&outbuf[0], 36); /* Bytes after the data length field */
1040 stw_be_p(&outbuf[6], current);
1041 /* outbuf[8] - outbuf[19]: Feature 0 - Profile list */
1042 outbuf[10] = 0x03; /* persistent, current */
1043 outbuf[11] = 8; /* two profiles */
1044 stw_be_p(&outbuf[12], MMC_PROFILE_DVD_ROM);
1045 outbuf[14] = (current == MMC_PROFILE_DVD_ROM);
1046 stw_be_p(&outbuf[16], MMC_PROFILE_CD_ROM);
1047 outbuf[18] = (current == MMC_PROFILE_CD_ROM);
1048 /* outbuf[20] - outbuf[31]: Feature 1 - Core feature */
1049 stw_be_p(&outbuf[20], 1);
1050 outbuf[22] = 0x08 | 0x03; /* version 2, persistent, current */
1051 outbuf[23] = 8;
1052 stl_be_p(&outbuf[24], 1); /* SCSI */
1053 outbuf[28] = 1; /* DBE = 1, mandatory */
1054 /* outbuf[32] - outbuf[39]: Feature 3 - Removable media feature */
1055 stw_be_p(&outbuf[32], 3);
1056 outbuf[34] = 0x08 | 0x03; /* version 2, persistent, current */
1057 outbuf[35] = 4;
1058 outbuf[36] = 0x39; /* tray, load=1, eject=1, unlocked at powerup, lock=1 */
1059 /* TODO: Random readable, CD read, DVD read, drive serial number,
1060 power management */
1061 return 40;
1062 }
1063
1064 static int scsi_emulate_mechanism_status(SCSIDiskState *s, uint8_t *outbuf)
1065 {
1066 if (s->qdev.type != TYPE_ROM) {
1067 return -1;
1068 }
1069 memset(outbuf, 0, 8);
1070 outbuf[5] = 1; /* CD-ROM */
1071 return 8;
1072 }
1073
1074 static int mode_sense_page(SCSIDiskState *s, int page, uint8_t **p_outbuf,
1075 int page_control)
1076 {
1077 static const int mode_sense_valid[0x3f] = {
1078 [MODE_PAGE_HD_GEOMETRY] = (1 << TYPE_DISK),
1079 [MODE_PAGE_FLEXIBLE_DISK_GEOMETRY] = (1 << TYPE_DISK),
1080 [MODE_PAGE_CACHING] = (1 << TYPE_DISK) | (1 << TYPE_ROM),
1081 [MODE_PAGE_R_W_ERROR] = (1 << TYPE_DISK) | (1 << TYPE_ROM),
1082 [MODE_PAGE_AUDIO_CTL] = (1 << TYPE_ROM),
1083 [MODE_PAGE_CAPABILITIES] = (1 << TYPE_ROM),
1084 };
1085
1086 uint8_t *p = *p_outbuf + 2;
1087 int length;
1088
1089 if ((mode_sense_valid[page] & (1 << s->qdev.type)) == 0) {
1090 return -1;
1091 }
1092
1093 /*
1094 * If Changeable Values are requested, a mask denoting those mode parameters
1095 * that are changeable shall be returned. As we currently don't support
1096 * parameter changes via MODE_SELECT all bits are returned set to zero.
1097 * The buffer was already menset to zero by the caller of this function.
1098 *
1099 * The offsets here are off by two compared to the descriptions in the
1100 * SCSI specs, because those include a 2-byte header. This is unfortunate,
1101 * but it is done so that offsets are consistent within our implementation
1102 * of MODE SENSE and MODE SELECT. MODE SELECT has to deal with both
1103 * 2-byte and 4-byte headers.
1104 */
1105 switch (page) {
1106 case MODE_PAGE_HD_GEOMETRY:
1107 length = 0x16;
1108 if (page_control == 1) { /* Changeable Values */
1109 break;
1110 }
1111 /* if a geometry hint is available, use it */
1112 p[0] = (s->qdev.conf.cyls >> 16) & 0xff;
1113 p[1] = (s->qdev.conf.cyls >> 8) & 0xff;
1114 p[2] = s->qdev.conf.cyls & 0xff;
1115 p[3] = s->qdev.conf.heads & 0xff;
1116 /* Write precomp start cylinder, disabled */
1117 p[4] = (s->qdev.conf.cyls >> 16) & 0xff;
1118 p[5] = (s->qdev.conf.cyls >> 8) & 0xff;
1119 p[6] = s->qdev.conf.cyls & 0xff;
1120 /* Reduced current start cylinder, disabled */
1121 p[7] = (s->qdev.conf.cyls >> 16) & 0xff;
1122 p[8] = (s->qdev.conf.cyls >> 8) & 0xff;
1123 p[9] = s->qdev.conf.cyls & 0xff;
1124 /* Device step rate [ns], 200ns */
1125 p[10] = 0;
1126 p[11] = 200;
1127 /* Landing zone cylinder */
1128 p[12] = 0xff;
1129 p[13] = 0xff;
1130 p[14] = 0xff;
1131 /* Medium rotation rate [rpm], 5400 rpm */
1132 p[18] = (5400 >> 8) & 0xff;
1133 p[19] = 5400 & 0xff;
1134 break;
1135
1136 case MODE_PAGE_FLEXIBLE_DISK_GEOMETRY:
1137 length = 0x1e;
1138 if (page_control == 1) { /* Changeable Values */
1139 break;
1140 }
1141 /* Transfer rate [kbit/s], 5Mbit/s */
1142 p[0] = 5000 >> 8;
1143 p[1] = 5000 & 0xff;
1144 /* if a geometry hint is available, use it */
1145 p[2] = s->qdev.conf.heads & 0xff;
1146 p[3] = s->qdev.conf.secs & 0xff;
1147 p[4] = s->qdev.blocksize >> 8;
1148 p[6] = (s->qdev.conf.cyls >> 8) & 0xff;
1149 p[7] = s->qdev.conf.cyls & 0xff;
1150 /* Write precomp start cylinder, disabled */
1151 p[8] = (s->qdev.conf.cyls >> 8) & 0xff;
1152 p[9] = s->qdev.conf.cyls & 0xff;
1153 /* Reduced current start cylinder, disabled */
1154 p[10] = (s->qdev.conf.cyls >> 8) & 0xff;
1155 p[11] = s->qdev.conf.cyls & 0xff;
1156 /* Device step rate [100us], 100us */
1157 p[12] = 0;
1158 p[13] = 1;
1159 /* Device step pulse width [us], 1us */
1160 p[14] = 1;
1161 /* Device head settle delay [100us], 100us */
1162 p[15] = 0;
1163 p[16] = 1;
1164 /* Motor on delay [0.1s], 0.1s */
1165 p[17] = 1;
1166 /* Motor off delay [0.1s], 0.1s */
1167 p[18] = 1;
1168 /* Medium rotation rate [rpm], 5400 rpm */
1169 p[26] = (5400 >> 8) & 0xff;
1170 p[27] = 5400 & 0xff;
1171 break;
1172
1173 case MODE_PAGE_CACHING:
1174 length = 0x12;
1175 if (page_control == 1 || /* Changeable Values */
1176 blk_enable_write_cache(s->qdev.conf.blk)) {
1177 p[0] = 4; /* WCE */
1178 }
1179 break;
1180
1181 case MODE_PAGE_R_W_ERROR:
1182 length = 10;
1183 if (page_control == 1) { /* Changeable Values */
1184 break;
1185 }
1186 p[0] = 0x80; /* Automatic Write Reallocation Enabled */
1187 if (s->qdev.type == TYPE_ROM) {
1188 p[1] = 0x20; /* Read Retry Count */
1189 }
1190 break;
1191
1192 case MODE_PAGE_AUDIO_CTL:
1193 length = 14;
1194 break;
1195
1196 case MODE_PAGE_CAPABILITIES:
1197 length = 0x14;
1198 if (page_control == 1) { /* Changeable Values */
1199 break;
1200 }
1201
1202 p[0] = 0x3b; /* CD-R & CD-RW read */
1203 p[1] = 0; /* Writing not supported */
1204 p[2] = 0x7f; /* Audio, composite, digital out,
1205 mode 2 form 1&2, multi session */
1206 p[3] = 0xff; /* CD DA, DA accurate, RW supported,
1207 RW corrected, C2 errors, ISRC,
1208 UPC, Bar code */
1209 p[4] = 0x2d | (s->tray_locked ? 2 : 0);
1210 /* Locking supported, jumper present, eject, tray */
1211 p[5] = 0; /* no volume & mute control, no
1212 changer */
1213 p[6] = (50 * 176) >> 8; /* 50x read speed */
1214 p[7] = (50 * 176) & 0xff;
1215 p[8] = 2 >> 8; /* Two volume levels */
1216 p[9] = 2 & 0xff;
1217 p[10] = 2048 >> 8; /* 2M buffer */
1218 p[11] = 2048 & 0xff;
1219 p[12] = (16 * 176) >> 8; /* 16x read speed current */
1220 p[13] = (16 * 176) & 0xff;
1221 p[16] = (16 * 176) >> 8; /* 16x write speed */
1222 p[17] = (16 * 176) & 0xff;
1223 p[18] = (16 * 176) >> 8; /* 16x write speed current */
1224 p[19] = (16 * 176) & 0xff;
1225 break;
1226
1227 default:
1228 return -1;
1229 }
1230
1231 assert(length < 256);
1232 (*p_outbuf)[0] = page;
1233 (*p_outbuf)[1] = length;
1234 *p_outbuf += length + 2;
1235 return length + 2;
1236 }
1237
1238 static int scsi_disk_emulate_mode_sense(SCSIDiskReq *r, uint8_t *outbuf)
1239 {
1240 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
1241 uint64_t nb_sectors;
1242 bool dbd;
1243 int page, buflen, ret, page_control;
1244 uint8_t *p;
1245 uint8_t dev_specific_param;
1246
1247 dbd = (r->req.cmd.buf[1] & 0x8) != 0;
1248 page = r->req.cmd.buf[2] & 0x3f;
1249 page_control = (r->req.cmd.buf[2] & 0xc0) >> 6;
1250
1251 trace_scsi_disk_emulate_mode_sense((r->req.cmd.buf[0] == MODE_SENSE) ? 6 :
1252 10, page, r->req.cmd.xfer, page_control);
1253 memset(outbuf, 0, r->req.cmd.xfer);
1254 p = outbuf;
1255
1256 if (s->qdev.type == TYPE_DISK) {
1257 dev_specific_param = s->features & (1 << SCSI_DISK_F_DPOFUA) ? 0x10 : 0;
1258 if (blk_is_read_only(s->qdev.conf.blk)) {
1259 dev_specific_param |= 0x80; /* Readonly. */
1260 }
1261 } else {
1262 /* MMC prescribes that CD/DVD drives have no block descriptors,
1263 * and defines no device-specific parameter. */
1264 dev_specific_param = 0x00;
1265 dbd = true;
1266 }
1267
1268 if (r->req.cmd.buf[0] == MODE_SENSE) {
1269 p[1] = 0; /* Default media type. */
1270 p[2] = dev_specific_param;
1271 p[3] = 0; /* Block descriptor length. */
1272 p += 4;
1273 } else { /* MODE_SENSE_10 */
1274 p[2] = 0; /* Default media type. */
1275 p[3] = dev_specific_param;
1276 p[6] = p[7] = 0; /* Block descriptor length. */
1277 p += 8;
1278 }
1279
1280 blk_get_geometry(s->qdev.conf.blk, &nb_sectors);
1281 if (!dbd && nb_sectors) {
1282 if (r->req.cmd.buf[0] == MODE_SENSE) {
1283 outbuf[3] = 8; /* Block descriptor length */
1284 } else { /* MODE_SENSE_10 */
1285 outbuf[7] = 8; /* Block descriptor length */
1286 }
1287 nb_sectors /= (s->qdev.blocksize / 512);
1288 if (nb_sectors > 0xffffff) {
1289 nb_sectors = 0;
1290 }
1291 p[0] = 0; /* media density code */
1292 p[1] = (nb_sectors >> 16) & 0xff;
1293 p[2] = (nb_sectors >> 8) & 0xff;
1294 p[3] = nb_sectors & 0xff;
1295 p[4] = 0; /* reserved */
1296 p[5] = 0; /* bytes 5-7 are the sector size in bytes */
1297 p[6] = s->qdev.blocksize >> 8;
1298 p[7] = 0;
1299 p += 8;
1300 }
1301
1302 if (page_control == 3) {
1303 /* Saved Values */
1304 scsi_check_condition(r, SENSE_CODE(SAVING_PARAMS_NOT_SUPPORTED));
1305 return -1;
1306 }
1307
1308 if (page == 0x3f) {
1309 for (page = 0; page <= 0x3e; page++) {
1310 mode_sense_page(s, page, &p, page_control);
1311 }
1312 } else {
1313 ret = mode_sense_page(s, page, &p, page_control);
1314 if (ret == -1) {
1315 return -1;
1316 }
1317 }
1318
1319 buflen = p - outbuf;
1320 /*
1321 * The mode data length field specifies the length in bytes of the
1322 * following data that is available to be transferred. The mode data
1323 * length does not include itself.
1324 */
1325 if (r->req.cmd.buf[0] == MODE_SENSE) {
1326 outbuf[0] = buflen - 1;
1327 } else { /* MODE_SENSE_10 */
1328 outbuf[0] = ((buflen - 2) >> 8) & 0xff;
1329 outbuf[1] = (buflen - 2) & 0xff;
1330 }
1331 return buflen;
1332 }
1333
1334 static int scsi_disk_emulate_read_toc(SCSIRequest *req, uint8_t *outbuf)
1335 {
1336 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
1337 int start_track, format, msf, toclen;
1338 uint64_t nb_sectors;
1339
1340 msf = req->cmd.buf[1] & 2;
1341 format = req->cmd.buf[2] & 0xf;
1342 start_track = req->cmd.buf[6];
1343 blk_get_geometry(s->qdev.conf.blk, &nb_sectors);
1344 trace_scsi_disk_emulate_read_toc(start_track, format, msf >> 1);
1345 nb_sectors /= s->qdev.blocksize / 512;
1346 switch (format) {
1347 case 0:
1348 toclen = cdrom_read_toc(nb_sectors, outbuf, msf, start_track);
1349 break;
1350 case 1:
1351 /* multi session : only a single session defined */
1352 toclen = 12;
1353 memset(outbuf, 0, 12);
1354 outbuf[1] = 0x0a;
1355 outbuf[2] = 0x01;
1356 outbuf[3] = 0x01;
1357 break;
1358 case 2:
1359 toclen = cdrom_read_toc_raw(nb_sectors, outbuf, msf, start_track);
1360 break;
1361 default:
1362 return -1;
1363 }
1364 return toclen;
1365 }
1366
1367 static int scsi_disk_emulate_start_stop(SCSIDiskReq *r)
1368 {
1369 SCSIRequest *req = &r->req;
1370 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
1371 bool start = req->cmd.buf[4] & 1;
1372 bool loej = req->cmd.buf[4] & 2; /* load on start, eject on !start */
1373 int pwrcnd = req->cmd.buf[4] & 0xf0;
1374
1375 if (pwrcnd) {
1376 /* eject/load only happens for power condition == 0 */
1377 return 0;
1378 }
1379
1380 if ((s->features & (1 << SCSI_DISK_F_REMOVABLE)) && loej) {
1381 if (!start && !s->tray_open && s->tray_locked) {
1382 scsi_check_condition(r,
1383 blk_is_inserted(s->qdev.conf.blk)
1384 ? SENSE_CODE(ILLEGAL_REQ_REMOVAL_PREVENTED)
1385 : SENSE_CODE(NOT_READY_REMOVAL_PREVENTED));
1386 return -1;
1387 }
1388
1389 if (s->tray_open != !start) {
1390 blk_eject(s->qdev.conf.blk, !start);
1391 s->tray_open = !start;
1392 }
1393 }
1394 return 0;
1395 }
1396
1397 static void scsi_disk_emulate_read_data(SCSIRequest *req)
1398 {
1399 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
1400 int buflen = r->iov.iov_len;
1401
1402 if (buflen) {
1403 trace_scsi_disk_emulate_read_data(buflen);
1404 r->iov.iov_len = 0;
1405 r->started = true;
1406 scsi_req_data(&r->req, buflen);
1407 return;
1408 }
1409
1410 /* This also clears the sense buffer for REQUEST SENSE. */
1411 scsi_req_complete(&r->req, GOOD);
1412 }
1413
1414 static int scsi_disk_check_mode_select(SCSIDiskState *s, int page,
1415 uint8_t *inbuf, int inlen)
1416 {
1417 uint8_t mode_current[SCSI_MAX_MODE_LEN];
1418 uint8_t mode_changeable[SCSI_MAX_MODE_LEN];
1419 uint8_t *p;
1420 int len, expected_len, changeable_len, i;
1421
1422 /* The input buffer does not include the page header, so it is
1423 * off by 2 bytes.
1424 */
1425 expected_len = inlen + 2;
1426 if (expected_len > SCSI_MAX_MODE_LEN) {
1427 return -1;
1428 }
1429
1430 p = mode_current;
1431 memset(mode_current, 0, inlen + 2);
1432 len = mode_sense_page(s, page, &p, 0);
1433 if (len < 0 || len != expected_len) {
1434 return -1;
1435 }
1436
1437 p = mode_changeable;
1438 memset(mode_changeable, 0, inlen + 2);
1439 changeable_len = mode_sense_page(s, page, &p, 1);
1440 assert(changeable_len == len);
1441
1442 /* Check that unchangeable bits are the same as what MODE SENSE
1443 * would return.
1444 */
1445 for (i = 2; i < len; i++) {
1446 if (((mode_current[i] ^ inbuf[i - 2]) & ~mode_changeable[i]) != 0) {
1447 return -1;
1448 }
1449 }
1450 return 0;
1451 }
1452
1453 static void scsi_disk_apply_mode_select(SCSIDiskState *s, int page, uint8_t *p)
1454 {
1455 switch (page) {
1456 case MODE_PAGE_CACHING:
1457 blk_set_enable_write_cache(s->qdev.conf.blk, (p[0] & 4) != 0);
1458 break;
1459
1460 default:
1461 break;
1462 }
1463 }
1464
1465 static int mode_select_pages(SCSIDiskReq *r, uint8_t *p, int len, bool change)
1466 {
1467 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
1468
1469 while (len > 0) {
1470 int page, subpage, page_len;
1471
1472 /* Parse both possible formats for the mode page headers. */
1473 page = p[0] & 0x3f;
1474 if (p[0] & 0x40) {
1475 if (len < 4) {
1476 goto invalid_param_len;
1477 }
1478 subpage = p[1];
1479 page_len = lduw_be_p(&p[2]);
1480 p += 4;
1481 len -= 4;
1482 } else {
1483 if (len < 2) {
1484 goto invalid_param_len;
1485 }
1486 subpage = 0;
1487 page_len = p[1];
1488 p += 2;
1489 len -= 2;
1490 }
1491
1492 if (subpage) {
1493 goto invalid_param;
1494 }
1495 if (page_len > len) {
1496 goto invalid_param_len;
1497 }
1498
1499 if (!change) {
1500 if (scsi_disk_check_mode_select(s, page, p, page_len) < 0) {
1501 goto invalid_param;
1502 }
1503 } else {
1504 scsi_disk_apply_mode_select(s, page, p);
1505 }
1506
1507 p += page_len;
1508 len -= page_len;
1509 }
1510 return 0;
1511
1512 invalid_param:
1513 scsi_check_condition(r, SENSE_CODE(INVALID_PARAM));
1514 return -1;
1515
1516 invalid_param_len:
1517 scsi_check_condition(r, SENSE_CODE(INVALID_PARAM_LEN));
1518 return -1;
1519 }
1520
1521 static void scsi_disk_emulate_mode_select(SCSIDiskReq *r, uint8_t *inbuf)
1522 {
1523 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
1524 uint8_t *p = inbuf;
1525 int cmd = r->req.cmd.buf[0];
1526 int len = r->req.cmd.xfer;
1527 int hdr_len = (cmd == MODE_SELECT ? 4 : 8);
1528 int bd_len;
1529 int pass;
1530
1531 /* We only support PF=1, SP=0. */
1532 if ((r->req.cmd.buf[1] & 0x11) != 0x10) {
1533 goto invalid_field;
1534 }
1535
1536 if (len < hdr_len) {
1537 goto invalid_param_len;
1538 }
1539
1540 bd_len = (cmd == MODE_SELECT ? p[3] : lduw_be_p(&p[6]));
1541 len -= hdr_len;
1542 p += hdr_len;
1543 if (len < bd_len) {
1544 goto invalid_param_len;
1545 }
1546 if (bd_len != 0 && bd_len != 8) {
1547 goto invalid_param;
1548 }
1549
1550 len -= bd_len;
1551 p += bd_len;
1552
1553 /* Ensure no change is made if there is an error! */
1554 for (pass = 0; pass < 2; pass++) {
1555 if (mode_select_pages(r, p, len, pass == 1) < 0) {
1556 assert(pass == 0);
1557 return;
1558 }
1559 }
1560 if (!blk_enable_write_cache(s->qdev.conf.blk)) {
1561 /* The request is used as the AIO opaque value, so add a ref. */
1562 scsi_req_ref(&r->req);
1563 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 0,
1564 BLOCK_ACCT_FLUSH);
1565 r->req.aiocb = blk_aio_flush(s->qdev.conf.blk, scsi_aio_complete, r);
1566 return;
1567 }
1568
1569 scsi_req_complete(&r->req, GOOD);
1570 return;
1571
1572 invalid_param:
1573 scsi_check_condition(r, SENSE_CODE(INVALID_PARAM));
1574 return;
1575
1576 invalid_param_len:
1577 scsi_check_condition(r, SENSE_CODE(INVALID_PARAM_LEN));
1578 return;
1579
1580 invalid_field:
1581 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
1582 }
1583
1584 static inline bool check_lba_range(SCSIDiskState *s,
1585 uint64_t sector_num, uint32_t nb_sectors)
1586 {
1587 /*
1588 * The first line tests that no overflow happens when computing the last
1589 * sector. The second line tests that the last accessed sector is in
1590 * range.
1591 *
1592 * Careful, the computations should not underflow for nb_sectors == 0,
1593 * and a 0-block read to the first LBA beyond the end of device is
1594 * valid.
1595 */
1596 return (sector_num <= sector_num + nb_sectors &&
1597 sector_num + nb_sectors <= s->qdev.max_lba + 1);
1598 }
1599
1600 typedef struct UnmapCBData {
1601 SCSIDiskReq *r;
1602 uint8_t *inbuf;
1603 int count;
1604 } UnmapCBData;
1605
1606 static void scsi_unmap_complete(void *opaque, int ret);
1607
1608 static void scsi_unmap_complete_noio(UnmapCBData *data, int ret)
1609 {
1610 SCSIDiskReq *r = data->r;
1611 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
1612
1613 assert(r->req.aiocb == NULL);
1614
1615 if (data->count > 0) {
1616 r->sector = ldq_be_p(&data->inbuf[0])
1617 * (s->qdev.blocksize / BDRV_SECTOR_SIZE);
1618 r->sector_count = (ldl_be_p(&data->inbuf[8]) & 0xffffffffULL)
1619 * (s->qdev.blocksize / BDRV_SECTOR_SIZE);
1620 if (!check_lba_range(s, r->sector, r->sector_count)) {
1621 block_acct_invalid(blk_get_stats(s->qdev.conf.blk),
1622 BLOCK_ACCT_UNMAP);
1623 scsi_check_condition(r, SENSE_CODE(LBA_OUT_OF_RANGE));
1624 goto done;
1625 }
1626
1627 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct,
1628 r->sector_count * BDRV_SECTOR_SIZE,
1629 BLOCK_ACCT_UNMAP);
1630
1631 r->req.aiocb = blk_aio_pdiscard(s->qdev.conf.blk,
1632 r->sector * BDRV_SECTOR_SIZE,
1633 r->sector_count * BDRV_SECTOR_SIZE,
1634 scsi_unmap_complete, data);
1635 data->count--;
1636 data->inbuf += 16;
1637 return;
1638 }
1639
1640 scsi_req_complete(&r->req, GOOD);
1641
1642 done:
1643 scsi_req_unref(&r->req);
1644 g_free(data);
1645 }
1646
1647 static void scsi_unmap_complete(void *opaque, int ret)
1648 {
1649 UnmapCBData *data = opaque;
1650 SCSIDiskReq *r = data->r;
1651 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
1652
1653 assert(r->req.aiocb != NULL);
1654 r->req.aiocb = NULL;
1655
1656 aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
1657 if (scsi_disk_req_check_error(r, ret, true)) {
1658 scsi_req_unref(&r->req);
1659 g_free(data);
1660 } else {
1661 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct);
1662 scsi_unmap_complete_noio(data, ret);
1663 }
1664 aio_context_release(blk_get_aio_context(s->qdev.conf.blk));
1665 }
1666
1667 static void scsi_disk_emulate_unmap(SCSIDiskReq *r, uint8_t *inbuf)
1668 {
1669 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
1670 uint8_t *p = inbuf;
1671 int len = r->req.cmd.xfer;
1672 UnmapCBData *data;
1673
1674 /* Reject ANCHOR=1. */
1675 if (r->req.cmd.buf[1] & 0x1) {
1676 goto invalid_field;
1677 }
1678
1679 if (len < 8) {
1680 goto invalid_param_len;
1681 }
1682 if (len < lduw_be_p(&p[0]) + 2) {
1683 goto invalid_param_len;
1684 }
1685 if (len < lduw_be_p(&p[2]) + 8) {
1686 goto invalid_param_len;
1687 }
1688 if (lduw_be_p(&p[2]) & 15) {
1689 goto invalid_param_len;
1690 }
1691
1692 if (blk_is_read_only(s->qdev.conf.blk)) {
1693 block_acct_invalid(blk_get_stats(s->qdev.conf.blk), BLOCK_ACCT_UNMAP);
1694 scsi_check_condition(r, SENSE_CODE(WRITE_PROTECTED));
1695 return;
1696 }
1697
1698 data = g_new0(UnmapCBData, 1);
1699 data->r = r;
1700 data->inbuf = &p[8];
1701 data->count = lduw_be_p(&p[2]) >> 4;
1702
1703 /* The matching unref is in scsi_unmap_complete, before data is freed. */
1704 scsi_req_ref(&r->req);
1705 scsi_unmap_complete_noio(data, 0);
1706 return;
1707
1708 invalid_param_len:
1709 block_acct_invalid(blk_get_stats(s->qdev.conf.blk), BLOCK_ACCT_UNMAP);
1710 scsi_check_condition(r, SENSE_CODE(INVALID_PARAM_LEN));
1711 return;
1712
1713 invalid_field:
1714 block_acct_invalid(blk_get_stats(s->qdev.conf.blk), BLOCK_ACCT_UNMAP);
1715 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
1716 }
1717
1718 typedef struct WriteSameCBData {
1719 SCSIDiskReq *r;
1720 int64_t sector;
1721 int nb_sectors;
1722 QEMUIOVector qiov;
1723 struct iovec iov;
1724 } WriteSameCBData;
1725
1726 static void scsi_write_same_complete(void *opaque, int ret)
1727 {
1728 WriteSameCBData *data = opaque;
1729 SCSIDiskReq *r = data->r;
1730 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
1731
1732 assert(r->req.aiocb != NULL);
1733 r->req.aiocb = NULL;
1734 aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
1735 if (scsi_disk_req_check_error(r, ret, true)) {
1736 goto done;
1737 }
1738
1739 block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct);
1740
1741 data->nb_sectors -= data->iov.iov_len / 512;
1742 data->sector += data->iov.iov_len / 512;
1743 data->iov.iov_len = MIN(data->nb_sectors * 512, data->iov.iov_len);
1744 if (data->iov.iov_len) {
1745 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct,
1746 data->iov.iov_len, BLOCK_ACCT_WRITE);
1747 /* Reinitialize qiov, to handle unaligned WRITE SAME request
1748 * where final qiov may need smaller size */
1749 qemu_iovec_init_external(&data->qiov, &data->iov, 1);
1750 r->req.aiocb = blk_aio_pwritev(s->qdev.conf.blk,
1751 data->sector << BDRV_SECTOR_BITS,
1752 &data->qiov, 0,
1753 scsi_write_same_complete, data);
1754 aio_context_release(blk_get_aio_context(s->qdev.conf.blk));
1755 return;
1756 }
1757
1758 scsi_req_complete(&r->req, GOOD);
1759
1760 done:
1761 scsi_req_unref(&r->req);
1762 qemu_vfree(data->iov.iov_base);
1763 g_free(data);
1764 aio_context_release(blk_get_aio_context(s->qdev.conf.blk));
1765 }
1766
1767 static void scsi_disk_emulate_write_same(SCSIDiskReq *r, uint8_t *inbuf)
1768 {
1769 SCSIRequest *req = &r->req;
1770 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
1771 uint32_t nb_sectors = scsi_data_cdb_xfer(r->req.cmd.buf);
1772 WriteSameCBData *data;
1773 uint8_t *buf;
1774 int i;
1775
1776 /* Fail if PBDATA=1 or LBDATA=1 or ANCHOR=1. */
1777 if (nb_sectors == 0 || (req->cmd.buf[1] & 0x16)) {
1778 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
1779 return;
1780 }
1781
1782 if (blk_is_read_only(s->qdev.conf.blk)) {
1783 scsi_check_condition(r, SENSE_CODE(WRITE_PROTECTED));
1784 return;
1785 }
1786 if (!check_lba_range(s, r->req.cmd.lba, nb_sectors)) {
1787 scsi_check_condition(r, SENSE_CODE(LBA_OUT_OF_RANGE));
1788 return;
1789 }
1790
1791 if ((req->cmd.buf[1] & 0x1) || buffer_is_zero(inbuf, s->qdev.blocksize)) {
1792 int flags = (req->cmd.buf[1] & 0x8) ? BDRV_REQ_MAY_UNMAP : 0;
1793
1794 /* The request is used as the AIO opaque value, so add a ref. */
1795 scsi_req_ref(&r->req);
1796 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct,
1797 nb_sectors * s->qdev.blocksize,
1798 BLOCK_ACCT_WRITE);
1799 r->req.aiocb = blk_aio_pwrite_zeroes(s->qdev.conf.blk,
1800 r->req.cmd.lba * s->qdev.blocksize,
1801 nb_sectors * s->qdev.blocksize,
1802 flags, scsi_aio_complete, r);
1803 return;
1804 }
1805
1806 data = g_new0(WriteSameCBData, 1);
1807 data->r = r;
1808 data->sector = r->req.cmd.lba * (s->qdev.blocksize / 512);
1809 data->nb_sectors = nb_sectors * (s->qdev.blocksize / 512);
1810 data->iov.iov_len = MIN(data->nb_sectors * 512, SCSI_WRITE_SAME_MAX);
1811 data->iov.iov_base = buf = blk_blockalign(s->qdev.conf.blk,
1812 data->iov.iov_len);
1813 qemu_iovec_init_external(&data->qiov, &data->iov, 1);
1814
1815 for (i = 0; i < data->iov.iov_len; i += s->qdev.blocksize) {
1816 memcpy(&buf[i], inbuf, s->qdev.blocksize);
1817 }
1818
1819 scsi_req_ref(&r->req);
1820 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct,
1821 data->iov.iov_len, BLOCK_ACCT_WRITE);
1822 r->req.aiocb = blk_aio_pwritev(s->qdev.conf.blk,
1823 data->sector << BDRV_SECTOR_BITS,
1824 &data->qiov, 0,
1825 scsi_write_same_complete, data);
1826 }
1827
1828 static void scsi_disk_emulate_write_data(SCSIRequest *req)
1829 {
1830 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
1831
1832 if (r->iov.iov_len) {
1833 int buflen = r->iov.iov_len;
1834 trace_scsi_disk_emulate_write_data(buflen);
1835 r->iov.iov_len = 0;
1836 scsi_req_data(&r->req, buflen);
1837 return;
1838 }
1839
1840 switch (req->cmd.buf[0]) {
1841 case MODE_SELECT:
1842 case MODE_SELECT_10:
1843 /* This also clears the sense buffer for REQUEST SENSE. */
1844 scsi_disk_emulate_mode_select(r, r->iov.iov_base);
1845 break;
1846
1847 case UNMAP:
1848 scsi_disk_emulate_unmap(r, r->iov.iov_base);
1849 break;
1850
1851 case VERIFY_10:
1852 case VERIFY_12:
1853 case VERIFY_16:
1854 if (r->req.status == -1) {
1855 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
1856 }
1857 break;
1858
1859 case WRITE_SAME_10:
1860 case WRITE_SAME_16:
1861 scsi_disk_emulate_write_same(r, r->iov.iov_base);
1862 break;
1863
1864 default:
1865 abort();
1866 }
1867 }
1868
1869 static int32_t scsi_disk_emulate_command(SCSIRequest *req, uint8_t *buf)
1870 {
1871 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
1872 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
1873 uint64_t nb_sectors;
1874 uint8_t *outbuf;
1875 int buflen;
1876
1877 switch (req->cmd.buf[0]) {
1878 case INQUIRY:
1879 case MODE_SENSE:
1880 case MODE_SENSE_10:
1881 case RESERVE:
1882 case RESERVE_10:
1883 case RELEASE:
1884 case RELEASE_10:
1885 case START_STOP:
1886 case ALLOW_MEDIUM_REMOVAL:
1887 case GET_CONFIGURATION:
1888 case GET_EVENT_STATUS_NOTIFICATION:
1889 case MECHANISM_STATUS:
1890 case REQUEST_SENSE:
1891 break;
1892
1893 default:
1894 if (!blk_is_available(s->qdev.conf.blk)) {
1895 scsi_check_condition(r, SENSE_CODE(NO_MEDIUM));
1896 return 0;
1897 }
1898 break;
1899 }
1900
1901 /*
1902 * FIXME: we shouldn't return anything bigger than 4k, but the code
1903 * requires the buffer to be as big as req->cmd.xfer in several
1904 * places. So, do not allow CDBs with a very large ALLOCATION
1905 * LENGTH. The real fix would be to modify scsi_read_data and
1906 * dma_buf_read, so that they return data beyond the buflen
1907 * as all zeros.
1908 */
1909 if (req->cmd.xfer > 65536) {
1910 goto illegal_request;
1911 }
1912 r->buflen = MAX(4096, req->cmd.xfer);
1913
1914 if (!r->iov.iov_base) {
1915 r->iov.iov_base = blk_blockalign(s->qdev.conf.blk, r->buflen);
1916 }
1917
1918 outbuf = r->iov.iov_base;
1919 memset(outbuf, 0, r->buflen);
1920 switch (req->cmd.buf[0]) {
1921 case TEST_UNIT_READY:
1922 assert(blk_is_available(s->qdev.conf.blk));
1923 break;
1924 case INQUIRY:
1925 buflen = scsi_disk_emulate_inquiry(req, outbuf);
1926 if (buflen < 0) {
1927 goto illegal_request;
1928 }
1929 break;
1930 case MODE_SENSE:
1931 case MODE_SENSE_10:
1932 buflen = scsi_disk_emulate_mode_sense(r, outbuf);
1933 if (buflen < 0) {
1934 goto illegal_request;
1935 }
1936 break;
1937 case READ_TOC:
1938 buflen = scsi_disk_emulate_read_toc(req, outbuf);
1939 if (buflen < 0) {
1940 goto illegal_request;
1941 }
1942 break;
1943 case RESERVE:
1944 if (req->cmd.buf[1] & 1) {
1945 goto illegal_request;
1946 }
1947 break;
1948 case RESERVE_10:
1949 if (req->cmd.buf[1] & 3) {
1950 goto illegal_request;
1951 }
1952 break;
1953 case RELEASE:
1954 if (req->cmd.buf[1] & 1) {
1955 goto illegal_request;
1956 }
1957 break;
1958 case RELEASE_10:
1959 if (req->cmd.buf[1] & 3) {
1960 goto illegal_request;
1961 }
1962 break;
1963 case START_STOP:
1964 if (scsi_disk_emulate_start_stop(r) < 0) {
1965 return 0;
1966 }
1967 break;
1968 case ALLOW_MEDIUM_REMOVAL:
1969 s->tray_locked = req->cmd.buf[4] & 1;
1970 blk_lock_medium(s->qdev.conf.blk, req->cmd.buf[4] & 1);
1971 break;
1972 case READ_CAPACITY_10:
1973 /* The normal LEN field for this command is zero. */
1974 memset(outbuf, 0, 8);
1975 blk_get_geometry(s->qdev.conf.blk, &nb_sectors);
1976 if (!nb_sectors) {
1977 scsi_check_condition(r, SENSE_CODE(LUN_NOT_READY));
1978 return 0;
1979 }
1980 if ((req->cmd.buf[8] & 1) == 0 && req->cmd.lba) {
1981 goto illegal_request;
1982 }
1983 nb_sectors /= s->qdev.blocksize / 512;
1984 /* Returned value is the address of the last sector. */
1985 nb_sectors--;
1986 /* Remember the new size for read/write sanity checking. */
1987 s->qdev.max_lba = nb_sectors;
1988 /* Clip to 2TB, instead of returning capacity modulo 2TB. */
1989 if (nb_sectors > UINT32_MAX) {
1990 nb_sectors = UINT32_MAX;
1991 }
1992 outbuf[0] = (nb_sectors >> 24) & 0xff;
1993 outbuf[1] = (nb_sectors >> 16) & 0xff;
1994 outbuf[2] = (nb_sectors >> 8) & 0xff;
1995 outbuf[3] = nb_sectors & 0xff;
1996 outbuf[4] = 0;
1997 outbuf[5] = 0;
1998 outbuf[6] = s->qdev.blocksize >> 8;
1999 outbuf[7] = 0;
2000 break;
2001 case REQUEST_SENSE:
2002 /* Just return "NO SENSE". */
2003 buflen = scsi_convert_sense(NULL, 0, outbuf, r->buflen,
2004 (req->cmd.buf[1] & 1) == 0);
2005 if (buflen < 0) {
2006 goto illegal_request;
2007 }
2008 break;
2009 case MECHANISM_STATUS:
2010 buflen = scsi_emulate_mechanism_status(s, outbuf);
2011 if (buflen < 0) {
2012 goto illegal_request;
2013 }
2014 break;
2015 case GET_CONFIGURATION:
2016 buflen = scsi_get_configuration(s, outbuf);
2017 if (buflen < 0) {
2018 goto illegal_request;
2019 }
2020 break;
2021 case GET_EVENT_STATUS_NOTIFICATION:
2022 buflen = scsi_get_event_status_notification(s, r, outbuf);
2023 if (buflen < 0) {
2024 goto illegal_request;
2025 }
2026 break;
2027 case READ_DISC_INFORMATION:
2028 buflen = scsi_read_disc_information(s, r, outbuf);
2029 if (buflen < 0) {
2030 goto illegal_request;
2031 }
2032 break;
2033 case READ_DVD_STRUCTURE:
2034 buflen = scsi_read_dvd_structure(s, r, outbuf);
2035 if (buflen < 0) {
2036 goto illegal_request;
2037 }
2038 break;
2039 case SERVICE_ACTION_IN_16:
2040 /* Service Action In subcommands. */
2041 if ((req->cmd.buf[1] & 31) == SAI_READ_CAPACITY_16) {
2042 trace_scsi_disk_emulate_command_SAI_16();
2043 memset(outbuf, 0, req->cmd.xfer);
2044 blk_get_geometry(s->qdev.conf.blk, &nb_sectors);
2045 if (!nb_sectors) {
2046 scsi_check_condition(r, SENSE_CODE(LUN_NOT_READY));
2047 return 0;
2048 }
2049 if ((req->cmd.buf[14] & 1) == 0 && req->cmd.lba) {
2050 goto illegal_request;
2051 }
2052 nb_sectors /= s->qdev.blocksize / 512;
2053 /* Returned value is the address of the last sector. */
2054 nb_sectors--;
2055 /* Remember the new size for read/write sanity checking. */
2056 s->qdev.max_lba = nb_sectors;
2057 outbuf[0] = (nb_sectors >> 56) & 0xff;
2058 outbuf[1] = (nb_sectors >> 48) & 0xff;
2059 outbuf[2] = (nb_sectors >> 40) & 0xff;
2060 outbuf[3] = (nb_sectors >> 32) & 0xff;
2061 outbuf[4] = (nb_sectors >> 24) & 0xff;
2062 outbuf[5] = (nb_sectors >> 16) & 0xff;
2063 outbuf[6] = (nb_sectors >> 8) & 0xff;
2064 outbuf[7] = nb_sectors & 0xff;
2065 outbuf[8] = 0;
2066 outbuf[9] = 0;
2067 outbuf[10] = s->qdev.blocksize >> 8;
2068 outbuf[11] = 0;
2069 outbuf[12] = 0;
2070 outbuf[13] = get_physical_block_exp(&s->qdev.conf);
2071
2072 /* set TPE bit if the format supports discard */
2073 if (s->qdev.conf.discard_granularity) {
2074 outbuf[14] = 0x80;
2075 }
2076
2077 /* Protection, exponent and lowest lba field left blank. */
2078 break;
2079 }
2080 trace_scsi_disk_emulate_command_SAI_unsupported();
2081 goto illegal_request;
2082 case SYNCHRONIZE_CACHE:
2083 /* The request is used as the AIO opaque value, so add a ref. */
2084 scsi_req_ref(&r->req);
2085 block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 0,
2086 BLOCK_ACCT_FLUSH);
2087 r->req.aiocb = blk_aio_flush(s->qdev.conf.blk, scsi_aio_complete, r);
2088 return 0;
2089 case SEEK_10:
2090 trace_scsi_disk_emulate_command_SEEK_10(r->req.cmd.lba);
2091 if (r->req.cmd.lba > s->qdev.max_lba) {
2092 goto illegal_lba;
2093 }
2094 break;
2095 case MODE_SELECT:
2096 trace_scsi_disk_emulate_command_MODE_SELECT(r->req.cmd.xfer);
2097 break;
2098 case MODE_SELECT_10:
2099 trace_scsi_disk_emulate_command_MODE_SELECT_10(r->req.cmd.xfer);
2100 break;
2101 case UNMAP:
2102 trace_scsi_disk_emulate_command_UNMAP(r->req.cmd.xfer);
2103 break;
2104 case VERIFY_10:
2105 case VERIFY_12:
2106 case VERIFY_16:
2107 trace_scsi_disk_emulate_command_VERIFY((req->cmd.buf[1] >> 1) & 3);
2108 if (req->cmd.buf[1] & 6) {
2109 goto illegal_request;
2110 }
2111 break;
2112 case WRITE_SAME_10:
2113 case WRITE_SAME_16:
2114 trace_scsi_disk_emulate_command_WRITE_SAME(
2115 req->cmd.buf[0] == WRITE_SAME_10 ? 10 : 16, r->req.cmd.xfer);
2116 break;
2117 default:
2118 trace_scsi_disk_emulate_command_UNKNOWN(buf[0],
2119 scsi_command_name(buf[0]));
2120 scsi_check_condition(r, SENSE_CODE(INVALID_OPCODE));
2121 return 0;
2122 }
2123 assert(!r->req.aiocb);
2124 r->iov.iov_len = MIN(r->buflen, req->cmd.xfer);
2125 if (r->iov.iov_len == 0) {
2126 scsi_req_complete(&r->req, GOOD);
2127 }
2128 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
2129 assert(r->iov.iov_len == req->cmd.xfer);
2130 return -r->iov.iov_len;
2131 } else {
2132 return r->iov.iov_len;
2133 }
2134
2135 illegal_request:
2136 if (r->req.status == -1) {
2137 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
2138 }
2139 return 0;
2140
2141 illegal_lba:
2142 scsi_check_condition(r, SENSE_CODE(LBA_OUT_OF_RANGE));
2143 return 0;
2144 }
2145
2146 /* Execute a scsi command. Returns the length of the data expected by the
2147 command. This will be Positive for data transfers from the device
2148 (eg. disk reads), negative for transfers to the device (eg. disk writes),
2149 and zero if the command does not transfer any data. */
2150
2151 static int32_t scsi_disk_dma_command(SCSIRequest *req, uint8_t *buf)
2152 {
2153 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
2154 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
2155 SCSIDiskClass *sdc = (SCSIDiskClass *) object_get_class(OBJECT(s));
2156 uint32_t len;
2157 uint8_t command;
2158
2159 command = buf[0];
2160
2161 if (!blk_is_available(s->qdev.conf.blk)) {
2162 scsi_check_condition(r, SENSE_CODE(NO_MEDIUM));
2163 return 0;
2164 }
2165
2166 len = scsi_data_cdb_xfer(r->req.cmd.buf);
2167 switch (command) {
2168 case READ_6:
2169 case READ_10:
2170 case READ_12:
2171 case READ_16:
2172 trace_scsi_disk_dma_command_READ(r->req.cmd.lba, len);
2173 /* Protection information is not supported. For SCSI versions 2 and
2174 * older (as determined by snooping the guest's INQUIRY commands),
2175 * there is no RD/WR/VRPROTECT, so skip this check in these versions.
2176 */
2177 if (s->qdev.scsi_version > 2 && (r->req.cmd.buf[1] & 0xe0)) {
2178 goto illegal_request;
2179 }
2180 if (!check_lba_range(s, r->req.cmd.lba, len)) {
2181 goto illegal_lba;
2182 }
2183 r->sector = r->req.cmd.lba * (s->qdev.blocksize / 512);
2184 r->sector_count = len * (s->qdev.blocksize / 512);
2185 break;
2186 case WRITE_6:
2187 case WRITE_10:
2188 case WRITE_12:
2189 case WRITE_16:
2190 case WRITE_VERIFY_10:
2191 case WRITE_VERIFY_12:
2192 case WRITE_VERIFY_16:
2193 if (blk_is_read_only(s->qdev.conf.blk)) {
2194 scsi_check_condition(r, SENSE_CODE(WRITE_PROTECTED));
2195 return 0;
2196 }
2197 trace_scsi_disk_dma_command_WRITE(
2198 (command & 0xe) == 0xe ? "And Verify " : "",
2199 r->req.cmd.lba, len);
2200 /* fall through */
2201 case VERIFY_10:
2202 case VERIFY_12:
2203 case VERIFY_16:
2204 /* We get here only for BYTCHK == 0x01 and only for scsi-block.
2205 * As far as DMA is concerned, we can treat it the same as a write;
2206 * scsi_block_do_sgio will send VERIFY commands.
2207 */
2208 if (s->qdev.scsi_version > 2 && (r->req.cmd.buf[1] & 0xe0)) {
2209 goto illegal_request;
2210 }
2211 if (!check_lba_range(s, r->req.cmd.lba, len)) {
2212 goto illegal_lba;
2213 }
2214 r->sector = r->req.cmd.lba * (s->qdev.blocksize / 512);
2215 r->sector_count = len * (s->qdev.blocksize / 512);
2216 break;
2217 default:
2218 abort();
2219 illegal_request:
2220 scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
2221 return 0;
2222 illegal_lba:
2223 scsi_check_condition(r, SENSE_CODE(LBA_OUT_OF_RANGE));
2224 return 0;
2225 }
2226 r->need_fua_emulation = sdc->need_fua_emulation(&r->req.cmd);
2227 if (r->sector_count == 0) {
2228 scsi_req_complete(&r->req, GOOD);
2229 }
2230 assert(r->iov.iov_len == 0);
2231 if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
2232 return -r->sector_count * 512;
2233 } else {
2234 return r->sector_count * 512;
2235 }
2236 }
2237
2238 static void scsi_disk_reset(DeviceState *dev)
2239 {
2240 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev.qdev, dev);
2241 uint64_t nb_sectors;
2242
2243 scsi_device_purge_requests(&s->qdev, SENSE_CODE(RESET));
2244
2245 blk_get_geometry(s->qdev.conf.blk, &nb_sectors);
2246 nb_sectors /= s->qdev.blocksize / 512;
2247 if (nb_sectors) {
2248 nb_sectors--;
2249 }
2250 s->qdev.max_lba = nb_sectors;
2251 /* reset tray statuses */
2252 s->tray_locked = 0;
2253 s->tray_open = 0;
2254
2255 s->qdev.scsi_version = s->qdev.default_scsi_version;
2256 }
2257
2258 static void scsi_disk_resize_cb(void *opaque)
2259 {
2260 SCSIDiskState *s = opaque;
2261
2262 /* SPC lists this sense code as available only for
2263 * direct-access devices.
2264 */
2265 if (s->qdev.type == TYPE_DISK) {
2266 scsi_device_report_change(&s->qdev, SENSE_CODE(CAPACITY_CHANGED));
2267 }
2268 }
2269
2270 static void scsi_cd_change_media_cb(void *opaque, bool load, Error **errp)
2271 {
2272 SCSIDiskState *s = opaque;
2273
2274 /*
2275 * When a CD gets changed, we have to report an ejected state and
2276 * then a loaded state to guests so that they detect tray
2277 * open/close and media change events. Guests that do not use
2278 * GET_EVENT_STATUS_NOTIFICATION to detect such tray open/close
2279 * states rely on this behavior.
2280 *
2281 * media_changed governs the state machine used for unit attention
2282 * report. media_event is used by GET EVENT STATUS NOTIFICATION.
2283 */
2284 s->media_changed = load;
2285 s->tray_open = !load;
2286 scsi_device_set_ua(&s->qdev, SENSE_CODE(UNIT_ATTENTION_NO_MEDIUM));
2287 s->media_event = true;
2288 s->eject_request = false;
2289 }
2290
2291 static void scsi_cd_eject_request_cb(void *opaque, bool force)
2292 {
2293 SCSIDiskState *s = opaque;
2294
2295 s->eject_request = true;
2296 if (force) {
2297 s->tray_locked = false;
2298 }
2299 }
2300
2301 static bool scsi_cd_is_tray_open(void *opaque)
2302 {
2303 return ((SCSIDiskState *)opaque)->tray_open;
2304 }
2305
2306 static bool scsi_cd_is_medium_locked(void *opaque)
2307 {
2308 return ((SCSIDiskState *)opaque)->tray_locked;
2309 }
2310
2311 static const BlockDevOps scsi_disk_removable_block_ops = {
2312 .change_media_cb = scsi_cd_change_media_cb,
2313 .eject_request_cb = scsi_cd_eject_request_cb,
2314 .is_tray_open = scsi_cd_is_tray_open,
2315 .is_medium_locked = scsi_cd_is_medium_locked,
2316
2317 .resize_cb = scsi_disk_resize_cb,
2318 };
2319
2320 static const BlockDevOps scsi_disk_block_ops = {
2321 .resize_cb = scsi_disk_resize_cb,
2322 };
2323
2324 static void scsi_disk_unit_attention_reported(SCSIDevice *dev)
2325 {
2326 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
2327 if (s->media_changed) {
2328 s->media_changed = false;
2329 scsi_device_set_ua(&s->qdev, SENSE_CODE(MEDIUM_CHANGED));
2330 }
2331 }
2332
2333 static void scsi_realize(SCSIDevice *dev, Error **errp)
2334 {
2335 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
2336 bool read_only;
2337
2338 if (!s->qdev.conf.blk) {
2339 error_setg(errp, "drive property not set");
2340 return;
2341 }
2342
2343 if (!(s->features & (1 << SCSI_DISK_F_REMOVABLE)) &&
2344 !blk_is_inserted(s->qdev.conf.blk)) {
2345 error_setg(errp, "Device needs media, but drive is empty");
2346 return;
2347 }
2348
2349 blkconf_blocksizes(&s->qdev.conf);
2350
2351 if (s->qdev.conf.logical_block_size >
2352 s->qdev.conf.physical_block_size) {
2353 error_setg(errp,
2354 "logical_block_size > physical_block_size not supported");
2355 return;
2356 }
2357
2358 if (blk_get_aio_context(s->qdev.conf.blk) != qemu_get_aio_context() &&
2359 !s->qdev.hba_supports_iothread)
2360 {
2361 error_setg(errp, "HBA does not support iothreads");
2362 return;
2363 }
2364
2365 if (dev->type == TYPE_DISK) {
2366 if (!blkconf_geometry(&dev->conf, NULL, 65535, 255, 255, errp)) {
2367 return;
2368 }
2369 }
2370
2371 read_only = blk_is_read_only(s->qdev.conf.blk);
2372 if (dev->type == TYPE_ROM) {
2373 read_only = true;
2374 }
2375
2376 if (!blkconf_apply_backend_options(&dev->conf, read_only,
2377 dev->type == TYPE_DISK, errp)) {
2378 return;
2379 }
2380
2381 if (s->qdev.conf.discard_granularity == -1) {
2382 s->qdev.conf.discard_granularity =
2383 MAX(s->qdev.conf.logical_block_size, DEFAULT_DISCARD_GRANULARITY);
2384 }
2385
2386 if (!s->version) {
2387 s->version = g_strdup(qemu_hw_version());
2388 }
2389 if (!s->vendor) {
2390 s->vendor = g_strdup("QEMU");
2391 }
2392 if (!s->device_id) {
2393 if (s->serial) {
2394 s->device_id = g_strdup_printf("%.20s", s->serial);
2395 } else {
2396 const char *str = blk_name(s->qdev.conf.blk);
2397 if (str && *str) {
2398 s->device_id = g_strdup(str);
2399 }
2400 }
2401 }
2402
2403 if (blk_is_sg(s->qdev.conf.blk)) {
2404 error_setg(errp, "unwanted /dev/sg*");
2405 return;
2406 }
2407
2408 if ((s->features & (1 << SCSI_DISK_F_REMOVABLE)) &&
2409 !(s->features & (1 << SCSI_DISK_F_NO_REMOVABLE_DEVOPS))) {
2410 blk_set_dev_ops(s->qdev.conf.blk, &scsi_disk_removable_block_ops, s);
2411 } else {
2412 blk_set_dev_ops(s->qdev.conf.blk, &scsi_disk_block_ops, s);
2413 }
2414 blk_set_guest_block_size(s->qdev.conf.blk, s->qdev.blocksize);
2415
2416 blk_iostatus_enable(s->qdev.conf.blk);
2417
2418 add_boot_device_lchs(&dev->qdev, NULL,
2419 dev->conf.lcyls,
2420 dev->conf.lheads,
2421 dev->conf.lsecs);
2422 }
2423
2424 static void scsi_unrealize(SCSIDevice *dev, Error **errp)
2425 {
2426 del_boot_device_lchs(&dev->qdev, NULL);
2427 }
2428
2429 static void scsi_hd_realize(SCSIDevice *dev, Error **errp)
2430 {
2431 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
2432 AioContext *ctx = NULL;
2433 /* can happen for devices without drive. The error message for missing
2434 * backend will be issued in scsi_realize
2435 */
2436 if (s->qdev.conf.blk) {
2437 ctx = blk_get_aio_context(s->qdev.conf.blk);
2438 aio_context_acquire(ctx);
2439 blkconf_blocksizes(&s->qdev.conf);
2440 }
2441 s->qdev.blocksize = s->qdev.conf.logical_block_size;
2442 s->qdev.type = TYPE_DISK;
2443 if (!s->product) {
2444 s->product = g_strdup("QEMU HARDDISK");
2445 }
2446 scsi_realize(&s->qdev, errp);
2447 if (ctx) {
2448 aio_context_release(ctx);
2449 }
2450 }
2451
2452 static void scsi_cd_realize(SCSIDevice *dev, Error **errp)
2453 {
2454 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
2455 AioContext *ctx;
2456 int ret;
2457
2458 if (!dev->conf.blk) {
2459 /* Anonymous BlockBackend for an empty drive. As we put it into
2460 * dev->conf, qdev takes care of detaching on unplug. */
2461 dev->conf.blk = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL);
2462 ret = blk_attach_dev(dev->conf.blk, &dev->qdev);
2463 assert(ret == 0);
2464 }
2465
2466 ctx = blk_get_aio_context(dev->conf.blk);
2467 aio_context_acquire(ctx);
2468 s->qdev.blocksize = 2048;
2469 s->qdev.type = TYPE_ROM;
2470 s->features |= 1 << SCSI_DISK_F_REMOVABLE;
2471 if (!s->product) {
2472 s->product = g_strdup("QEMU CD-ROM");
2473 }
2474 scsi_realize(&s->qdev, errp);
2475 aio_context_release(ctx);
2476 }
2477
2478 static void scsi_disk_realize(SCSIDevice *dev, Error **errp)
2479 {
2480 DriveInfo *dinfo;
2481 Error *local_err = NULL;
2482
2483 warn_report("'scsi-disk' is deprecated, "
2484 "please use 'scsi-hd' or 'scsi-cd' instead");
2485
2486 if (!dev->conf.blk) {
2487 scsi_realize(dev, &local_err);
2488 assert(local_err);
2489 error_propagate(errp, local_err);
2490 return;
2491 }
2492
2493 dinfo = blk_legacy_dinfo(dev->conf.blk);
2494 if (dinfo && dinfo->media_cd) {
2495 scsi_cd_realize(dev, errp);
2496 } else {
2497 scsi_hd_realize(dev, errp);
2498 }
2499 }
2500
2501 static const SCSIReqOps scsi_disk_emulate_reqops = {
2502 .size = sizeof(SCSIDiskReq),
2503 .free_req = scsi_free_request,
2504 .send_command = scsi_disk_emulate_command,
2505 .read_data = scsi_disk_emulate_read_data,
2506 .write_data = scsi_disk_emulate_write_data,
2507 .get_buf = scsi_get_buf,
2508 };
2509
2510 static const SCSIReqOps scsi_disk_dma_reqops = {
2511 .size = sizeof(SCSIDiskReq),
2512 .free_req = scsi_free_request,
2513 .send_command = scsi_disk_dma_command,
2514 .read_data = scsi_read_data,
2515 .write_data = scsi_write_data,
2516 .get_buf = scsi_get_buf,
2517 .load_request = scsi_disk_load_request,
2518 .save_request = scsi_disk_save_request,
2519 };
2520
2521 static const SCSIReqOps *const scsi_disk_reqops_dispatch[256] = {
2522 [TEST_UNIT_READY] = &scsi_disk_emulate_reqops,
2523 [INQUIRY] = &scsi_disk_emulate_reqops,
2524 [MODE_SENSE] = &scsi_disk_emulate_reqops,
2525 [MODE_SENSE_10] = &scsi_disk_emulate_reqops,
2526 [START_STOP] = &scsi_disk_emulate_reqops,
2527 [ALLOW_MEDIUM_REMOVAL] = &scsi_disk_emulate_reqops,
2528 [READ_CAPACITY_10] = &scsi_disk_emulate_reqops,
2529 [READ_TOC] = &scsi_disk_emulate_reqops,
2530 [READ_DVD_STRUCTURE] = &scsi_disk_emulate_reqops,
2531 [READ_DISC_INFORMATION] = &scsi_disk_emulate_reqops,
2532 [GET_CONFIGURATION] = &scsi_disk_emulate_reqops,
2533 [GET_EVENT_STATUS_NOTIFICATION] = &scsi_disk_emulate_reqops,
2534 [MECHANISM_STATUS] = &scsi_disk_emulate_reqops,
2535 [SERVICE_ACTION_IN_16] = &scsi_disk_emulate_reqops,
2536 [REQUEST_SENSE] = &scsi_disk_emulate_reqops,
2537 [SYNCHRONIZE_CACHE] = &scsi_disk_emulate_reqops,
2538 [SEEK_10] = &scsi_disk_emulate_reqops,
2539 [MODE_SELECT] = &scsi_disk_emulate_reqops,
2540 [MODE_SELECT_10] = &scsi_disk_emulate_reqops,
2541 [UNMAP] = &scsi_disk_emulate_reqops,
2542 [WRITE_SAME_10] = &scsi_disk_emulate_reqops,
2543 [WRITE_SAME_16] = &scsi_disk_emulate_reqops,
2544 [VERIFY_10] = &scsi_disk_emulate_reqops,
2545 [VERIFY_12] = &scsi_disk_emulate_reqops,
2546 [VERIFY_16] = &scsi_disk_emulate_reqops,
2547
2548 [READ_6] = &scsi_disk_dma_reqops,
2549 [READ_10] = &scsi_disk_dma_reqops,
2550 [READ_12] = &scsi_disk_dma_reqops,
2551 [READ_16] = &scsi_disk_dma_reqops,
2552 [WRITE_6] = &scsi_disk_dma_reqops,
2553 [WRITE_10] = &scsi_disk_dma_reqops,
2554 [WRITE_12] = &scsi_disk_dma_reqops,
2555 [WRITE_16] = &scsi_disk_dma_reqops,
2556 [WRITE_VERIFY_10] = &scsi_disk_dma_reqops,
2557 [WRITE_VERIFY_12] = &scsi_disk_dma_reqops,
2558 [WRITE_VERIFY_16] = &scsi_disk_dma_reqops,
2559 };
2560
2561 static void scsi_disk_new_request_dump(uint32_t lun, uint32_t tag, uint8_t *buf)
2562 {
2563 int i;
2564 int len = scsi_cdb_length(buf);
2565 char *line_buffer, *p;
2566
2567 line_buffer = g_malloc(len * 5 + 1);
2568
2569 for (i = 0, p = line_buffer; i < len; i++) {
2570 p += sprintf(p, " 0x%02x", buf[i]);
2571 }
2572 trace_scsi_disk_new_request(lun, tag, line_buffer);
2573
2574 g_free(line_buffer);
2575 }
2576
2577 static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun,
2578 uint8_t *buf, void *hba_private)
2579 {
2580 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d);
2581 SCSIRequest *req;
2582 const SCSIReqOps *ops;
2583 uint8_t command;
2584
2585 command = buf[0];
2586 ops = scsi_disk_reqops_dispatch[command];
2587 if (!ops) {
2588 ops = &scsi_disk_emulate_reqops;
2589 }
2590 req = scsi_req_alloc(ops, &s->qdev, tag, lun, hba_private);
2591
2592 if (trace_event_get_state_backends(TRACE_SCSI_DISK_NEW_REQUEST)) {
2593 scsi_disk_new_request_dump(lun, tag, buf);
2594 }
2595
2596 return req;
2597 }
2598
2599 #ifdef __linux__
2600 static int get_device_type(SCSIDiskState *s)
2601 {
2602 uint8_t cmd[16];
2603 uint8_t buf[36];
2604 int ret;
2605
2606 memset(cmd, 0, sizeof(cmd));
2607 memset(buf, 0, sizeof(buf));
2608 cmd[0] = INQUIRY;
2609 cmd[4] = sizeof(buf);
2610
2611 ret = scsi_SG_IO_FROM_DEV(s->qdev.conf.blk, cmd, sizeof(cmd),
2612 buf, sizeof(buf));
2613 if (ret < 0) {
2614 return -1;
2615 }
2616 s->qdev.type = buf[0];
2617 if (buf[1] & 0x80) {
2618 s->features |= 1 << SCSI_DISK_F_REMOVABLE;
2619 }
2620 return 0;
2621 }
2622
2623 static void scsi_block_realize(SCSIDevice *dev, Error **errp)
2624 {
2625 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
2626 AioContext *ctx;
2627 int sg_version;
2628 int rc;
2629
2630 if (!s->qdev.conf.blk) {
2631 error_setg(errp, "drive property not set");
2632 return;
2633 }
2634
2635 if (s->rotation_rate) {
2636 error_report_once("rotation_rate is specified for scsi-block but is "
2637 "not implemented. This option is deprecated and will "
2638 "be removed in a future version");
2639 }
2640
2641 ctx = blk_get_aio_context(s->qdev.conf.blk);
2642 aio_context_acquire(ctx);
2643
2644 /* check we are using a driver managing SG_IO (version 3 and after) */
2645 rc = blk_ioctl(s->qdev.conf.blk, SG_GET_VERSION_NUM, &sg_version);
2646 if (rc < 0) {
2647 error_setg_errno(errp, -rc, "cannot get SG_IO version number");
2648 if (rc != -EPERM) {
2649 error_append_hint(errp, "Is this a SCSI device?\n");
2650 }
2651 goto out;
2652 }
2653 if (sg_version < 30000) {
2654 error_setg(errp, "scsi generic interface too old");
2655 goto out;
2656 }
2657
2658 /* get device type from INQUIRY data */
2659 rc = get_device_type(s);
2660 if (rc < 0) {
2661 error_setg(errp, "INQUIRY failed");
2662 goto out;
2663 }
2664
2665 /* Make a guess for the block size, we'll fix it when the guest sends.
2666 * READ CAPACITY. If they don't, they likely would assume these sizes
2667 * anyway. (TODO: check in /sys).
2668 */
2669 if (s->qdev.type == TYPE_ROM || s->qdev.type == TYPE_WORM) {
2670 s->qdev.blocksize = 2048;
2671 } else {
2672 s->qdev.blocksize = 512;
2673 }
2674
2675 /* Makes the scsi-block device not removable by using HMP and QMP eject
2676 * command.
2677 */
2678 s->features |= (1 << SCSI_DISK_F_NO_REMOVABLE_DEVOPS);
2679
2680 scsi_realize(&s->qdev, errp);
2681 scsi_generic_read_device_inquiry(&s->qdev);
2682
2683 out:
2684 aio_context_release(ctx);
2685 }
2686
2687 typedef struct SCSIBlockReq {
2688 SCSIDiskReq req;
2689 sg_io_hdr_t io_header;
2690
2691 /* Selected bytes of the original CDB, copied into our own CDB. */
2692 uint8_t cmd, cdb1, group_number;
2693
2694 /* CDB passed to SG_IO. */
2695 uint8_t cdb[16];
2696 } SCSIBlockReq;
2697
2698 static BlockAIOCB *scsi_block_do_sgio(SCSIBlockReq *req,
2699 int64_t offset, QEMUIOVector *iov,
2700 int direction,
2701 BlockCompletionFunc *cb, void *opaque)
2702 {
2703 sg_io_hdr_t *io_header = &req->io_header;
2704 SCSIDiskReq *r = &req->req;
2705 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
2706 int nb_logical_blocks;
2707 uint64_t lba;
2708 BlockAIOCB *aiocb;
2709
2710 /* This is not supported yet. It can only happen if the guest does
2711 * reads and writes that are not aligned to one logical sectors
2712 * _and_ cover multiple MemoryRegions.
2713 */
2714 assert(offset % s->qdev.blocksize == 0);
2715 assert(iov->size % s->qdev.blocksize == 0);
2716
2717 io_header->interface_id = 'S';
2718
2719 /* The data transfer comes from the QEMUIOVector. */
2720 io_header->dxfer_direction = direction;
2721 io_header->dxfer_len = iov->size;
2722 io_header->dxferp = (void *)iov->iov;
2723 io_header->iovec_count = iov->niov;
2724 assert(io_header->iovec_count == iov->niov); /* no overflow! */
2725
2726 /* Build a new CDB with the LBA and length patched in, in case
2727 * DMA helpers split the transfer in multiple segments. Do not
2728 * build a CDB smaller than what the guest wanted, and only build
2729 * a larger one if strictly necessary.
2730 */
2731 io_header->cmdp = req->cdb;
2732 lba = offset / s->qdev.blocksize;
2733 nb_logical_blocks = io_header->dxfer_len / s->qdev.blocksize;
2734
2735 if ((req->cmd >> 5) == 0 && lba <= 0x1ffff) {
2736 /* 6-byte CDB */
2737 stl_be_p(&req->cdb[0], lba | (req->cmd << 24));
2738 req->cdb[4] = nb_logical_blocks;
2739 req->cdb[5] = 0;
2740 io_header->cmd_len = 6;
2741 } else if ((req->cmd >> 5) <= 1 && lba <= 0xffffffffULL) {
2742 /* 10-byte CDB */
2743 req->cdb[0] = (req->cmd & 0x1f) | 0x20;
2744 req->cdb[1] = req->cdb1;
2745 stl_be_p(&req->cdb[2], lba);
2746 req->cdb[6] = req->group_number;
2747 stw_be_p(&req->cdb[7], nb_logical_blocks);
2748 req->cdb[9] = 0;
2749 io_header->cmd_len = 10;
2750 } else if ((req->cmd >> 5) != 4 && lba <= 0xffffffffULL) {
2751 /* 12-byte CDB */
2752 req->cdb[0] = (req->cmd & 0x1f) | 0xA0;
2753 req->cdb[1] = req->cdb1;
2754 stl_be_p(&req->cdb[2], lba);
2755 stl_be_p(&req->cdb[6], nb_logical_blocks);
2756 req->cdb[10] = req->group_number;
2757 req->cdb[11] = 0;
2758 io_header->cmd_len = 12;
2759 } else {
2760 /* 16-byte CDB */
2761 req->cdb[0] = (req->cmd & 0x1f) | 0x80;
2762 req->cdb[1] = req->cdb1;
2763 stq_be_p(&req->cdb[2], lba);
2764 stl_be_p(&req->cdb[10], nb_logical_blocks);
2765 req->cdb[14] = req->group_number;
2766 req->cdb[15] = 0;
2767 io_header->cmd_len = 16;
2768 }
2769
2770 /* The rest is as in scsi-generic.c. */
2771 io_header->mx_sb_len = sizeof(r->req.sense);
2772 io_header->sbp = r->req.sense;
2773 io_header->timeout = UINT_MAX;
2774 io_header->usr_ptr = r;
2775 io_header->flags |= SG_FLAG_DIRECT_IO;
2776
2777 aiocb = blk_aio_ioctl(s->qdev.conf.blk, SG_IO, io_header, cb, opaque);
2778 assert(aiocb != NULL);
2779 return aiocb;
2780 }
2781
2782 static bool scsi_block_no_fua(SCSICommand *cmd)
2783 {
2784 return false;
2785 }
2786
2787 static BlockAIOCB *scsi_block_dma_readv(int64_t offset,
2788 QEMUIOVector *iov,
2789 BlockCompletionFunc *cb, void *cb_opaque,
2790 void *opaque)
2791 {
2792 SCSIBlockReq *r = opaque;
2793 return scsi_block_do_sgio(r, offset, iov,
2794 SG_DXFER_FROM_DEV, cb, cb_opaque);
2795 }
2796
2797 static BlockAIOCB *scsi_block_dma_writev(int64_t offset,
2798 QEMUIOVector *iov,
2799 BlockCompletionFunc *cb, void *cb_opaque,
2800 void *opaque)
2801 {
2802 SCSIBlockReq *r = opaque;
2803 return scsi_block_do_sgio(r, offset, iov,
2804 SG_DXFER_TO_DEV, cb, cb_opaque);
2805 }
2806
2807 static bool scsi_block_is_passthrough(SCSIDiskState *s, uint8_t *buf)
2808 {
2809 switch (buf[0]) {
2810 case VERIFY_10:
2811 case VERIFY_12:
2812 case VERIFY_16:
2813 /* Check if BYTCHK == 0x01 (data-out buffer contains data
2814 * for the number of logical blocks specified in the length
2815 * field). For other modes, do not use scatter/gather operation.
2816 */
2817 if ((buf[1] & 6) == 2) {
2818 return false;
2819 }
2820 break;
2821
2822 case READ_6:
2823 case READ_10:
2824 case READ_12:
2825 case READ_16:
2826 case WRITE_6:
2827 case WRITE_10:
2828 case WRITE_12:
2829 case WRITE_16:
2830 case WRITE_VERIFY_10:
2831 case WRITE_VERIFY_12:
2832 case WRITE_VERIFY_16:
2833 /* MMC writing cannot be done via DMA helpers, because it sometimes
2834 * involves writing beyond the maximum LBA or to negative LBA (lead-in).
2835 * We might use scsi_block_dma_reqops as long as no writing commands are
2836 * seen, but performance usually isn't paramount on optical media. So,
2837 * just make scsi-block operate the same as scsi-generic for them.
2838 */
2839 if (s->qdev.type != TYPE_ROM) {
2840 return false;
2841 }
2842 break;
2843
2844 default:
2845 break;
2846 }
2847
2848 return true;
2849 }
2850
2851
2852 static int32_t scsi_block_dma_command(SCSIRequest *req, uint8_t *buf)
2853 {
2854 SCSIBlockReq *r = (SCSIBlockReq *)req;
2855 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
2856
2857 r->cmd = req->cmd.buf[0];
2858 switch (r->cmd >> 5) {
2859 case 0:
2860 /* 6-byte CDB. */
2861 r->cdb1 = r->group_number = 0;
2862 break;
2863 case 1:
2864 /* 10-byte CDB. */
2865 r->cdb1 = req->cmd.buf[1];
2866 r->group_number = req->cmd.buf[6];
2867 break;
2868 case 4:
2869 /* 12-byte CDB. */
2870 r->cdb1 = req->cmd.buf[1];
2871 r->group_number = req->cmd.buf[10];
2872 break;
2873 case 5:
2874 /* 16-byte CDB. */
2875 r->cdb1 = req->cmd.buf[1];
2876 r->group_number = req->cmd.buf[14];
2877 break;
2878 default:
2879 abort();
2880 }
2881
2882 /* Protection information is not supported. For SCSI versions 2 and
2883 * older (as determined by snooping the guest's INQUIRY commands),
2884 * there is no RD/WR/VRPROTECT, so skip this check in these versions.
2885 */
2886 if (s->qdev.scsi_version > 2 && (req->cmd.buf[1] & 0xe0)) {
2887 scsi_check_condition(&r->req, SENSE_CODE(INVALID_FIELD));
2888 return 0;
2889 }
2890
2891 r->req.status = &r->io_header.status;
2892 return scsi_disk_dma_command(req, buf);
2893 }
2894
2895 static const SCSIReqOps scsi_block_dma_reqops = {
2896 .size = sizeof(SCSIBlockReq),
2897 .free_req = scsi_free_request,
2898 .send_command = scsi_block_dma_command,
2899 .read_data = scsi_read_data,
2900 .write_data = scsi_write_data,
2901 .get_buf = scsi_get_buf,
2902 .load_request = scsi_disk_load_request,
2903 .save_request = scsi_disk_save_request,
2904 };
2905
2906 static SCSIRequest *scsi_block_new_request(SCSIDevice *d, uint32_t tag,
2907 uint32_t lun, uint8_t *buf,
2908 void *hba_private)
2909 {
2910 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d);
2911
2912 if (scsi_block_is_passthrough(s, buf)) {
2913 return scsi_req_alloc(&scsi_generic_req_ops, &s->qdev, tag, lun,
2914 hba_private);
2915 } else {
2916 return scsi_req_alloc(&scsi_block_dma_reqops, &s->qdev, tag, lun,
2917 hba_private);
2918 }
2919 }
2920
2921 static int scsi_block_parse_cdb(SCSIDevice *d, SCSICommand *cmd,
2922 uint8_t *buf, void *hba_private)
2923 {
2924 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d);
2925
2926 if (scsi_block_is_passthrough(s, buf)) {
2927 return scsi_bus_parse_cdb(&s->qdev, cmd, buf, hba_private);
2928 } else {
2929 return scsi_req_parse_cdb(&s->qdev, cmd, buf);
2930 }
2931 }
2932
2933 static void scsi_block_update_sense(SCSIRequest *req)
2934 {
2935 SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
2936 SCSIBlockReq *br = DO_UPCAST(SCSIBlockReq, req, r);
2937 r->req.sense_len = MIN(br->io_header.sb_len_wr, sizeof(r->req.sense));
2938 }
2939 #endif
2940
2941 static
2942 BlockAIOCB *scsi_dma_readv(int64_t offset, QEMUIOVector *iov,
2943 BlockCompletionFunc *cb, void *cb_opaque,
2944 void *opaque)
2945 {
2946 SCSIDiskReq *r = opaque;
2947 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
2948 return blk_aio_preadv(s->qdev.conf.blk, offset, iov, 0, cb, cb_opaque);
2949 }
2950
2951 static
2952 BlockAIOCB *scsi_dma_writev(int64_t offset, QEMUIOVector *iov,
2953 BlockCompletionFunc *cb, void *cb_opaque,
2954 void *opaque)
2955 {
2956 SCSIDiskReq *r = opaque;
2957 SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
2958 return blk_aio_pwritev(s->qdev.conf.blk, offset, iov, 0, cb, cb_opaque);
2959 }
2960
2961 static void scsi_disk_base_class_initfn(ObjectClass *klass, void *data)
2962 {
2963 DeviceClass *dc = DEVICE_CLASS(klass);
2964 SCSIDiskClass *sdc = SCSI_DISK_BASE_CLASS(klass);
2965
2966 dc->fw_name = "disk";
2967 dc->reset = scsi_disk_reset;
2968 sdc->dma_readv = scsi_dma_readv;
2969 sdc->dma_writev = scsi_dma_writev;
2970 sdc->need_fua_emulation = scsi_is_cmd_fua;
2971 }
2972
2973 static const TypeInfo scsi_disk_base_info = {
2974 .name = TYPE_SCSI_DISK_BASE,
2975 .parent = TYPE_SCSI_DEVICE,
2976 .class_init = scsi_disk_base_class_initfn,
2977 .instance_size = sizeof(SCSIDiskState),
2978 .class_size = sizeof(SCSIDiskClass),
2979 .abstract = true,
2980 };
2981
2982 #define DEFINE_SCSI_DISK_PROPERTIES() \
2983 DEFINE_PROP_DRIVE_IOTHREAD("drive", SCSIDiskState, qdev.conf.blk), \
2984 DEFINE_BLOCK_PROPERTIES_BASE(SCSIDiskState, qdev.conf), \
2985 DEFINE_BLOCK_ERROR_PROPERTIES(SCSIDiskState, qdev.conf), \
2986 DEFINE_PROP_STRING("ver", SCSIDiskState, version), \
2987 DEFINE_PROP_STRING("serial", SCSIDiskState, serial), \
2988 DEFINE_PROP_STRING("vendor", SCSIDiskState, vendor), \
2989 DEFINE_PROP_STRING("product", SCSIDiskState, product), \
2990 DEFINE_PROP_STRING("device_id", SCSIDiskState, device_id)
2991
2992
2993 static Property scsi_hd_properties[] = {
2994 DEFINE_SCSI_DISK_PROPERTIES(),
2995 DEFINE_PROP_BIT("removable", SCSIDiskState, features,
2996 SCSI_DISK_F_REMOVABLE, false),
2997 DEFINE_PROP_BIT("dpofua", SCSIDiskState, features,
2998 SCSI_DISK_F_DPOFUA, false),
2999 DEFINE_PROP_UINT64("wwn", SCSIDiskState, qdev.wwn, 0),
3000 DEFINE_PROP_UINT64("port_wwn", SCSIDiskState, qdev.port_wwn, 0),
3001 DEFINE_PROP_UINT16("port_index", SCSIDiskState, port_index, 0),
3002 DEFINE_PROP_UINT64("max_unmap_size", SCSIDiskState, max_unmap_size,
3003 DEFAULT_MAX_UNMAP_SIZE),
3004 DEFINE_PROP_UINT64("max_io_size", SCSIDiskState, max_io_size,
3005 DEFAULT_MAX_IO_SIZE),
3006 DEFINE_PROP_UINT16("rotation_rate", SCSIDiskState, rotation_rate, 0),
3007 DEFINE_PROP_INT32("scsi_version", SCSIDiskState, qdev.default_scsi_version,
3008 5),
3009 DEFINE_BLOCK_CHS_PROPERTIES(SCSIDiskState, qdev.conf),
3010 DEFINE_PROP_END_OF_LIST(),
3011 };
3012
3013 static const VMStateDescription vmstate_scsi_disk_state = {
3014 .name = "scsi-disk",
3015 .version_id = 1,
3016 .minimum_version_id = 1,
3017 .fields = (VMStateField[]) {
3018 VMSTATE_SCSI_DEVICE(qdev, SCSIDiskState),
3019 VMSTATE_BOOL(media_changed, SCSIDiskState),
3020 VMSTATE_BOOL(media_event, SCSIDiskState),
3021 VMSTATE_BOOL(eject_request, SCSIDiskState),
3022 VMSTATE_BOOL(tray_open, SCSIDiskState),
3023 VMSTATE_BOOL(tray_locked, SCSIDiskState),
3024 VMSTATE_END_OF_LIST()
3025 }
3026 };
3027
3028 static void scsi_hd_class_initfn(ObjectClass *klass, void *data)
3029 {
3030 DeviceClass *dc = DEVICE_CLASS(klass);
3031 SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass);
3032
3033 sc->realize = scsi_hd_realize;
3034 sc->unrealize = scsi_unrealize;
3035 sc->alloc_req = scsi_new_request;
3036 sc->unit_attention_reported = scsi_disk_unit_attention_reported;
3037 dc->desc = "virtual SCSI disk";
3038 device_class_set_props(dc, scsi_hd_properties);
3039 dc->vmsd = &vmstate_scsi_disk_state;
3040 }
3041
3042 static const TypeInfo scsi_hd_info = {
3043 .name = "scsi-hd",
3044 .parent = TYPE_SCSI_DISK_BASE,
3045 .class_init = scsi_hd_class_initfn,
3046 };
3047
3048 static Property scsi_cd_properties[] = {
3049 DEFINE_SCSI_DISK_PROPERTIES(),
3050 DEFINE_PROP_UINT64("wwn", SCSIDiskState, qdev.wwn, 0),
3051 DEFINE_PROP_UINT64("port_wwn", SCSIDiskState, qdev.port_wwn, 0),
3052 DEFINE_PROP_UINT16("port_index", SCSIDiskState, port_index, 0),
3053 DEFINE_PROP_UINT64("max_io_size", SCSIDiskState, max_io_size,
3054 DEFAULT_MAX_IO_SIZE),
3055 DEFINE_PROP_INT32("scsi_version", SCSIDiskState, qdev.default_scsi_version,
3056 5),
3057 DEFINE_PROP_END_OF_LIST(),
3058 };
3059
3060 static void scsi_cd_class_initfn(ObjectClass *klass, void *data)
3061 {
3062 DeviceClass *dc = DEVICE_CLASS(klass);
3063 SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass);
3064
3065 sc->realize = scsi_cd_realize;
3066 sc->alloc_req = scsi_new_request;
3067 sc->unit_attention_reported = scsi_disk_unit_attention_reported;
3068 dc->desc = "virtual SCSI CD-ROM";
3069 device_class_set_props(dc, scsi_cd_properties);
3070 dc->vmsd = &vmstate_scsi_disk_state;
3071 }
3072
3073 static const TypeInfo scsi_cd_info = {
3074 .name = "scsi-cd",
3075 .parent = TYPE_SCSI_DISK_BASE,
3076 .class_init = scsi_cd_class_initfn,
3077 };
3078
3079 #ifdef __linux__
3080 static Property scsi_block_properties[] = {
3081 DEFINE_BLOCK_ERROR_PROPERTIES(SCSIDiskState, qdev.conf), \
3082 DEFINE_PROP_DRIVE("drive", SCSIDiskState, qdev.conf.blk),
3083 DEFINE_PROP_BOOL("share-rw", SCSIDiskState, qdev.conf.share_rw, false),
3084 DEFINE_PROP_UINT16("rotation_rate", SCSIDiskState, rotation_rate, 0),
3085 DEFINE_PROP_UINT64("max_unmap_size", SCSIDiskState, max_unmap_size,
3086 DEFAULT_MAX_UNMAP_SIZE),
3087 DEFINE_PROP_UINT64("max_io_size", SCSIDiskState, max_io_size,
3088 DEFAULT_MAX_IO_SIZE),
3089 DEFINE_PROP_INT32("scsi_version", SCSIDiskState, qdev.default_scsi_version,
3090 -1),
3091 DEFINE_PROP_END_OF_LIST(),
3092 };
3093
3094 static void scsi_block_class_initfn(ObjectClass *klass, void *data)
3095 {
3096 DeviceClass *dc = DEVICE_CLASS(klass);
3097 SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass);
3098 SCSIDiskClass *sdc = SCSI_DISK_BASE_CLASS(klass);
3099
3100 sc->realize = scsi_block_realize;
3101 sc->alloc_req = scsi_block_new_request;
3102 sc->parse_cdb = scsi_block_parse_cdb;
3103 sdc->dma_readv = scsi_block_dma_readv;
3104 sdc->dma_writev = scsi_block_dma_writev;
3105 sdc->update_sense = scsi_block_update_sense;
3106 sdc->need_fua_emulation = scsi_block_no_fua;
3107 dc->desc = "SCSI block device passthrough";
3108 device_class_set_props(dc, scsi_block_properties);
3109 dc->vmsd = &vmstate_scsi_disk_state;
3110 }
3111
3112 static const TypeInfo scsi_block_info = {
3113 .name = "scsi-block",
3114 .parent = TYPE_SCSI_DISK_BASE,
3115 .class_init = scsi_block_class_initfn,
3116 };
3117 #endif
3118
3119 static Property scsi_disk_properties[] = {
3120 DEFINE_SCSI_DISK_PROPERTIES(),
3121 DEFINE_PROP_BIT("removable", SCSIDiskState, features,
3122 SCSI_DISK_F_REMOVABLE, false),
3123 DEFINE_PROP_BIT("dpofua", SCSIDiskState, features,
3124 SCSI_DISK_F_DPOFUA, false),
3125 DEFINE_PROP_UINT64("wwn", SCSIDiskState, qdev.wwn, 0),
3126 DEFINE_PROP_UINT64("port_wwn", SCSIDiskState, qdev.port_wwn, 0),
3127 DEFINE_PROP_UINT16("port_index", SCSIDiskState, port_index, 0),
3128 DEFINE_PROP_UINT64("max_unmap_size", SCSIDiskState, max_unmap_size,
3129 DEFAULT_MAX_UNMAP_SIZE),
3130 DEFINE_PROP_UINT64("max_io_size", SCSIDiskState, max_io_size,
3131 DEFAULT_MAX_IO_SIZE),
3132 DEFINE_PROP_INT32("scsi_version", SCSIDiskState, qdev.default_scsi_version,
3133 5),
3134 DEFINE_PROP_END_OF_LIST(),
3135 };
3136
3137 static void scsi_disk_class_initfn(ObjectClass *klass, void *data)
3138 {
3139 DeviceClass *dc = DEVICE_CLASS(klass);
3140 SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass);
3141
3142 sc->realize = scsi_disk_realize;
3143 sc->alloc_req = scsi_new_request;
3144 sc->unit_attention_reported = scsi_disk_unit_attention_reported;
3145 dc->fw_name = "disk";
3146 dc->desc = "virtual SCSI disk or CD-ROM (legacy)";
3147 dc->reset = scsi_disk_reset;
3148 device_class_set_props(dc, scsi_disk_properties);
3149 dc->vmsd = &vmstate_scsi_disk_state;
3150 }
3151
3152 static const TypeInfo scsi_disk_info = {
3153 .name = "scsi-disk",
3154 .parent = TYPE_SCSI_DISK_BASE,
3155 .class_init = scsi_disk_class_initfn,
3156 };
3157
3158 static void scsi_disk_register_types(void)
3159 {
3160 type_register_static(&scsi_disk_base_info);
3161 type_register_static(&scsi_hd_info);
3162 type_register_static(&scsi_cd_info);
3163 #ifdef __linux__
3164 type_register_static(&scsi_block_info);
3165 #endif
3166 type_register_static(&scsi_disk_info);
3167 }
3168
3169 type_init(scsi_disk_register_types)
AR7 emulation for QEMU