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16#include "qemu/osdep.h"
17#include "qapi/error.h"
18#include "standard-headers/linux/virtio_ids.h"
19#include "hw/virtio/virtio-scsi.h"
20#include "migration/qemu-file-types.h"
21#include "qemu/error-report.h"
22#include "qemu/iov.h"
23#include "qemu/module.h"
24#include "sysemu/block-backend.h"
25#include "sysemu/dma.h"
26#include "hw/qdev-properties.h"
27#include "hw/scsi/scsi.h"
28#include "scsi/constants.h"
29#include "hw/virtio/virtio-bus.h"
30#include "hw/virtio/virtio-access.h"
31#include "trace.h"
32
33typedef struct VirtIOSCSIReq {
34
35
36
37
38
39 VirtQueueElement elem;
40
41 VirtIOSCSI *dev;
42 VirtQueue *vq;
43 QEMUSGList qsgl;
44 QEMUIOVector resp_iov;
45
46
47 QTAILQ_ENTRY(VirtIOSCSIReq) next;
48
49
50 int remaining;
51
52 SCSIRequest *sreq;
53 size_t resp_size;
54 enum SCSIXferMode mode;
55 union {
56 VirtIOSCSICmdResp cmd;
57 VirtIOSCSICtrlTMFResp tmf;
58 VirtIOSCSICtrlANResp an;
59 VirtIOSCSIEvent event;
60 } resp;
61 union {
62 VirtIOSCSICmdReq cmd;
63 VirtIOSCSICtrlTMFReq tmf;
64 VirtIOSCSICtrlANReq an;
65 } req;
66} VirtIOSCSIReq;
67
68static inline int virtio_scsi_get_lun(uint8_t *lun)
69{
70 return ((lun[2] << 8) | lun[3]) & 0x3FFF;
71}
72
73static inline SCSIDevice *virtio_scsi_device_get(VirtIOSCSI *s, uint8_t *lun)
74{
75 if (lun[0] != 1) {
76 return NULL;
77 }
78 if (lun[2] != 0 && !(lun[2] >= 0x40 && lun[2] < 0x80)) {
79 return NULL;
80 }
81 return scsi_device_get(&s->bus, 0, lun[1], virtio_scsi_get_lun(lun));
82}
83
84static void virtio_scsi_init_req(VirtIOSCSI *s, VirtQueue *vq, VirtIOSCSIReq *req)
85{
86 VirtIODevice *vdev = VIRTIO_DEVICE(s);
87 const size_t zero_skip =
88 offsetof(VirtIOSCSIReq, resp_iov) + sizeof(req->resp_iov);
89
90 req->vq = vq;
91 req->dev = s;
92 qemu_sglist_init(&req->qsgl, DEVICE(s), 8, vdev->dma_as);
93 qemu_iovec_init(&req->resp_iov, 1);
94 memset((uint8_t *)req + zero_skip, 0, sizeof(*req) - zero_skip);
95}
96
97static void virtio_scsi_free_req(VirtIOSCSIReq *req)
98{
99 qemu_iovec_destroy(&req->resp_iov);
100 qemu_sglist_destroy(&req->qsgl);
101 g_free(req);
102}
103
104static void virtio_scsi_complete_req(VirtIOSCSIReq *req)
105{
106 VirtIOSCSI *s = req->dev;
107 VirtQueue *vq = req->vq;
108 VirtIODevice *vdev = VIRTIO_DEVICE(s);
109
110 qemu_iovec_from_buf(&req->resp_iov, 0, &req->resp, req->resp_size);
111 virtqueue_push(vq, &req->elem, req->qsgl.size + req->resp_iov.size);
112 if (s->dataplane_started && !s->dataplane_fenced) {
113 virtio_notify_irqfd(vdev, vq);
114 } else {
115 virtio_notify(vdev, vq);
116 }
117
118 if (req->sreq) {
119 req->sreq->hba_private = NULL;
120 scsi_req_unref(req->sreq);
121 }
122 virtio_scsi_free_req(req);
123}
124
125static void virtio_scsi_bad_req(VirtIOSCSIReq *req)
126{
127 virtio_error(VIRTIO_DEVICE(req->dev), "wrong size for virtio-scsi headers");
128 virtqueue_detach_element(req->vq, &req->elem, 0);
129 virtio_scsi_free_req(req);
130}
131
132static size_t qemu_sgl_concat(VirtIOSCSIReq *req, struct iovec *iov,
133 hwaddr *addr, int num, size_t skip)
134{
135 QEMUSGList *qsgl = &req->qsgl;
136 size_t copied = 0;
137
138 while (num) {
139 if (skip >= iov->iov_len) {
140 skip -= iov->iov_len;
141 } else {
142 qemu_sglist_add(qsgl, *addr + skip, iov->iov_len - skip);
143 copied += iov->iov_len - skip;
144 skip = 0;
145 }
146 iov++;
147 addr++;
148 num--;
149 }
150
151 assert(skip == 0);
152 return copied;
153}
154
155static int virtio_scsi_parse_req(VirtIOSCSIReq *req,
156 unsigned req_size, unsigned resp_size)
157{
158 VirtIODevice *vdev = (VirtIODevice *) req->dev;
159 size_t in_size, out_size;
160
161 if (iov_to_buf(req->elem.out_sg, req->elem.out_num, 0,
162 &req->req, req_size) < req_size) {
163 return -EINVAL;
164 }
165
166 if (qemu_iovec_concat_iov(&req->resp_iov,
167 req->elem.in_sg, req->elem.in_num, 0,
168 resp_size) < resp_size) {
169 return -EINVAL;
170 }
171
172 req->resp_size = resp_size;
173
174
175
176
177
178
179
180
181
182
183
184 if (!virtio_vdev_has_feature(vdev, VIRTIO_F_ANY_LAYOUT)) {
185 if (req->elem.out_num) {
186 req_size = req->elem.out_sg[0].iov_len;
187 }
188 if (req->elem.in_num) {
189 resp_size = req->elem.in_sg[0].iov_len;
190 }
191 }
192
193 out_size = qemu_sgl_concat(req, req->elem.out_sg,
194 &req->elem.out_addr[0], req->elem.out_num,
195 req_size);
196 in_size = qemu_sgl_concat(req, req->elem.in_sg,
197 &req->elem.in_addr[0], req->elem.in_num,
198 resp_size);
199
200 if (out_size && in_size) {
201 return -ENOTSUP;
202 }
203
204 if (out_size) {
205 req->mode = SCSI_XFER_TO_DEV;
206 } else if (in_size) {
207 req->mode = SCSI_XFER_FROM_DEV;
208 }
209
210 return 0;
211}
212
213static VirtIOSCSIReq *virtio_scsi_pop_req(VirtIOSCSI *s, VirtQueue *vq)
214{
215 VirtIOSCSICommon *vs = (VirtIOSCSICommon *)s;
216 VirtIOSCSIReq *req;
217
218 req = virtqueue_pop(vq, sizeof(VirtIOSCSIReq) + vs->cdb_size);
219 if (!req) {
220 return NULL;
221 }
222 virtio_scsi_init_req(s, vq, req);
223 return req;
224}
225
226static void virtio_scsi_save_request(QEMUFile *f, SCSIRequest *sreq)
227{
228 VirtIOSCSIReq *req = sreq->hba_private;
229 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(req->dev);
230 VirtIODevice *vdev = VIRTIO_DEVICE(req->dev);
231 uint32_t n = virtio_get_queue_index(req->vq) - VIRTIO_SCSI_VQ_NUM_FIXED;
232
233 assert(n < vs->conf.num_queues);
234 qemu_put_be32s(f, &n);
235 qemu_put_virtqueue_element(vdev, f, &req->elem);
236}
237
238static void *virtio_scsi_load_request(QEMUFile *f, SCSIRequest *sreq)
239{
240 SCSIBus *bus = sreq->bus;
241 VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus);
242 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s);
243 VirtIODevice *vdev = VIRTIO_DEVICE(s);
244 VirtIOSCSIReq *req;
245 uint32_t n;
246
247 qemu_get_be32s(f, &n);
248 assert(n < vs->conf.num_queues);
249 req = qemu_get_virtqueue_element(vdev, f,
250 sizeof(VirtIOSCSIReq) + vs->cdb_size);
251 virtio_scsi_init_req(s, vs->cmd_vqs[n], req);
252
253 if (virtio_scsi_parse_req(req, sizeof(VirtIOSCSICmdReq) + vs->cdb_size,
254 sizeof(VirtIOSCSICmdResp) + vs->sense_size) < 0) {
255 error_report("invalid SCSI request migration data");
256 exit(1);
257 }
258
259 scsi_req_ref(sreq);
260 req->sreq = sreq;
261 if (req->sreq->cmd.mode != SCSI_XFER_NONE) {
262 assert(req->sreq->cmd.mode == req->mode);
263 }
264 return req;
265}
266
267typedef struct {
268 Notifier notifier;
269 VirtIOSCSIReq *tmf_req;
270} VirtIOSCSICancelNotifier;
271
272static void virtio_scsi_cancel_notify(Notifier *notifier, void *data)
273{
274 VirtIOSCSICancelNotifier *n = container_of(notifier,
275 VirtIOSCSICancelNotifier,
276 notifier);
277
278 if (--n->tmf_req->remaining == 0) {
279 VirtIOSCSIReq *req = n->tmf_req;
280
281 trace_virtio_scsi_tmf_resp(virtio_scsi_get_lun(req->req.tmf.lun),
282 req->req.tmf.tag, req->resp.tmf.response);
283 virtio_scsi_complete_req(req);
284 }
285 g_free(n);
286}
287
288static inline void virtio_scsi_ctx_check(VirtIOSCSI *s, SCSIDevice *d)
289{
290 if (s->dataplane_started && d && blk_is_available(d->conf.blk)) {
291 assert(blk_get_aio_context(d->conf.blk) == s->ctx);
292 }
293}
294
295static void virtio_scsi_do_one_tmf_bh(VirtIOSCSIReq *req)
296{
297 VirtIOSCSI *s = req->dev;
298 SCSIDevice *d = virtio_scsi_device_get(s, req->req.tmf.lun);
299 BusChild *kid;
300 int target;
301
302 switch (req->req.tmf.subtype) {
303 case VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET:
304 if (!d) {
305 req->resp.tmf.response = VIRTIO_SCSI_S_BAD_TARGET;
306 goto out;
307 }
308 if (d->lun != virtio_scsi_get_lun(req->req.tmf.lun)) {
309 req->resp.tmf.response = VIRTIO_SCSI_S_INCORRECT_LUN;
310 goto out;
311 }
312 qatomic_inc(&s->resetting);
313 device_cold_reset(&d->qdev);
314 qatomic_dec(&s->resetting);
315 break;
316
317 case VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET:
318 target = req->req.tmf.lun[1];
319 qatomic_inc(&s->resetting);
320
321 rcu_read_lock();
322 QTAILQ_FOREACH_RCU(kid, &s->bus.qbus.children, sibling) {
323 SCSIDevice *d1 = SCSI_DEVICE(kid->child);
324 if (d1->channel == 0 && d1->id == target) {
325 device_cold_reset(&d1->qdev);
326 }
327 }
328 rcu_read_unlock();
329
330 qatomic_dec(&s->resetting);
331 break;
332
333 default:
334 g_assert_not_reached();
335 break;
336 }
337
338out:
339 object_unref(OBJECT(d));
340
341 virtio_scsi_acquire(s);
342 virtio_scsi_complete_req(req);
343 virtio_scsi_release(s);
344}
345
346
347static void virtio_scsi_do_tmf_bh(void *opaque)
348{
349 VirtIOSCSI *s = opaque;
350 QTAILQ_HEAD(, VirtIOSCSIReq) reqs = QTAILQ_HEAD_INITIALIZER(reqs);
351 VirtIOSCSIReq *req;
352 VirtIOSCSIReq *tmp;
353
354 GLOBAL_STATE_CODE();
355
356 virtio_scsi_acquire(s);
357
358 QTAILQ_FOREACH_SAFE(req, &s->tmf_bh_list, next, tmp) {
359 QTAILQ_REMOVE(&s->tmf_bh_list, req, next);
360 QTAILQ_INSERT_TAIL(&reqs, req, next);
361 }
362
363 qemu_bh_delete(s->tmf_bh);
364 s->tmf_bh = NULL;
365
366 virtio_scsi_release(s);
367
368 QTAILQ_FOREACH_SAFE(req, &reqs, next, tmp) {
369 QTAILQ_REMOVE(&reqs, req, next);
370 virtio_scsi_do_one_tmf_bh(req);
371 }
372}
373
374static void virtio_scsi_reset_tmf_bh(VirtIOSCSI *s)
375{
376 VirtIOSCSIReq *req;
377 VirtIOSCSIReq *tmp;
378
379 GLOBAL_STATE_CODE();
380
381 virtio_scsi_acquire(s);
382
383 if (s->tmf_bh) {
384 qemu_bh_delete(s->tmf_bh);
385 s->tmf_bh = NULL;
386 }
387
388 QTAILQ_FOREACH_SAFE(req, &s->tmf_bh_list, next, tmp) {
389 QTAILQ_REMOVE(&s->tmf_bh_list, req, next);
390
391
392 req->resp.tmf.response = VIRTIO_SCSI_S_TARGET_FAILURE;
393 virtio_scsi_complete_req(req);
394 }
395
396 virtio_scsi_release(s);
397}
398
399static void virtio_scsi_defer_tmf_to_bh(VirtIOSCSIReq *req)
400{
401 VirtIOSCSI *s = req->dev;
402
403 QTAILQ_INSERT_TAIL(&s->tmf_bh_list, req, next);
404
405 if (!s->tmf_bh) {
406 s->tmf_bh = qemu_bh_new(virtio_scsi_do_tmf_bh, s);
407 qemu_bh_schedule(s->tmf_bh);
408 }
409}
410
411
412
413
414static int virtio_scsi_do_tmf(VirtIOSCSI *s, VirtIOSCSIReq *req)
415{
416 SCSIDevice *d = virtio_scsi_device_get(s, req->req.tmf.lun);
417 SCSIRequest *r, *next;
418 int ret = 0;
419
420 virtio_scsi_ctx_check(s, d);
421
422 req->resp.tmf.response = VIRTIO_SCSI_S_OK;
423
424
425
426
427
428 req->req.tmf.subtype =
429 virtio_tswap32(VIRTIO_DEVICE(s), req->req.tmf.subtype);
430
431 trace_virtio_scsi_tmf_req(virtio_scsi_get_lun(req->req.tmf.lun),
432 req->req.tmf.tag, req->req.tmf.subtype);
433
434 switch (req->req.tmf.subtype) {
435 case VIRTIO_SCSI_T_TMF_ABORT_TASK:
436 case VIRTIO_SCSI_T_TMF_QUERY_TASK:
437 if (!d) {
438 goto fail;
439 }
440 if (d->lun != virtio_scsi_get_lun(req->req.tmf.lun)) {
441 goto incorrect_lun;
442 }
443 QTAILQ_FOREACH_SAFE(r, &d->requests, next, next) {
444 VirtIOSCSIReq *cmd_req = r->hba_private;
445 if (cmd_req && cmd_req->req.cmd.tag == req->req.tmf.tag) {
446 break;
447 }
448 }
449 if (r) {
450
451
452
453
454 assert(r->hba_private);
455 if (req->req.tmf.subtype == VIRTIO_SCSI_T_TMF_QUERY_TASK) {
456
457
458
459 req->resp.tmf.response = VIRTIO_SCSI_S_FUNCTION_SUCCEEDED;
460 } else {
461 VirtIOSCSICancelNotifier *notifier;
462
463 req->remaining = 1;
464 notifier = g_new(VirtIOSCSICancelNotifier, 1);
465 notifier->tmf_req = req;
466 notifier->notifier.notify = virtio_scsi_cancel_notify;
467 scsi_req_cancel_async(r, ¬ifier->notifier);
468 ret = -EINPROGRESS;
469 }
470 }
471 break;
472
473 case VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET:
474 case VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET:
475 virtio_scsi_defer_tmf_to_bh(req);
476 ret = -EINPROGRESS;
477 break;
478
479 case VIRTIO_SCSI_T_TMF_ABORT_TASK_SET:
480 case VIRTIO_SCSI_T_TMF_CLEAR_TASK_SET:
481 case VIRTIO_SCSI_T_TMF_QUERY_TASK_SET:
482 if (!d) {
483 goto fail;
484 }
485 if (d->lun != virtio_scsi_get_lun(req->req.tmf.lun)) {
486 goto incorrect_lun;
487 }
488
489
490
491
492
493
494 req->remaining = 1;
495 QTAILQ_FOREACH_SAFE(r, &d->requests, next, next) {
496 if (r->hba_private) {
497 if (req->req.tmf.subtype == VIRTIO_SCSI_T_TMF_QUERY_TASK_SET) {
498
499
500
501 req->resp.tmf.response = VIRTIO_SCSI_S_FUNCTION_SUCCEEDED;
502 break;
503 } else {
504 VirtIOSCSICancelNotifier *notifier;
505
506 req->remaining++;
507 notifier = g_new(VirtIOSCSICancelNotifier, 1);
508 notifier->notifier.notify = virtio_scsi_cancel_notify;
509 notifier->tmf_req = req;
510 scsi_req_cancel_async(r, ¬ifier->notifier);
511 }
512 }
513 }
514 if (--req->remaining > 0) {
515 ret = -EINPROGRESS;
516 }
517 break;
518
519 case VIRTIO_SCSI_T_TMF_CLEAR_ACA:
520 default:
521 req->resp.tmf.response = VIRTIO_SCSI_S_FUNCTION_REJECTED;
522 break;
523 }
524
525 object_unref(OBJECT(d));
526 return ret;
527
528incorrect_lun:
529 req->resp.tmf.response = VIRTIO_SCSI_S_INCORRECT_LUN;
530 object_unref(OBJECT(d));
531 return ret;
532
533fail:
534 req->resp.tmf.response = VIRTIO_SCSI_S_BAD_TARGET;
535 object_unref(OBJECT(d));
536 return ret;
537}
538
539static void virtio_scsi_handle_ctrl_req(VirtIOSCSI *s, VirtIOSCSIReq *req)
540{
541 VirtIODevice *vdev = (VirtIODevice *)s;
542 uint32_t type;
543 int r = 0;
544
545 if (iov_to_buf(req->elem.out_sg, req->elem.out_num, 0,
546 &type, sizeof(type)) < sizeof(type)) {
547 virtio_scsi_bad_req(req);
548 return;
549 }
550
551 virtio_tswap32s(vdev, &type);
552 if (type == VIRTIO_SCSI_T_TMF) {
553 if (virtio_scsi_parse_req(req, sizeof(VirtIOSCSICtrlTMFReq),
554 sizeof(VirtIOSCSICtrlTMFResp)) < 0) {
555 virtio_scsi_bad_req(req);
556 return;
557 } else {
558 r = virtio_scsi_do_tmf(s, req);
559 }
560
561 } else if (type == VIRTIO_SCSI_T_AN_QUERY ||
562 type == VIRTIO_SCSI_T_AN_SUBSCRIBE) {
563 if (virtio_scsi_parse_req(req, sizeof(VirtIOSCSICtrlANReq),
564 sizeof(VirtIOSCSICtrlANResp)) < 0) {
565 virtio_scsi_bad_req(req);
566 return;
567 } else {
568 req->req.an.event_requested =
569 virtio_tswap32(VIRTIO_DEVICE(s), req->req.an.event_requested);
570 trace_virtio_scsi_an_req(virtio_scsi_get_lun(req->req.an.lun),
571 req->req.an.event_requested);
572 req->resp.an.event_actual = 0;
573 req->resp.an.response = VIRTIO_SCSI_S_OK;
574 }
575 }
576 if (r == 0) {
577 if (type == VIRTIO_SCSI_T_TMF)
578 trace_virtio_scsi_tmf_resp(virtio_scsi_get_lun(req->req.tmf.lun),
579 req->req.tmf.tag,
580 req->resp.tmf.response);
581 else if (type == VIRTIO_SCSI_T_AN_QUERY ||
582 type == VIRTIO_SCSI_T_AN_SUBSCRIBE)
583 trace_virtio_scsi_an_resp(virtio_scsi_get_lun(req->req.an.lun),
584 req->resp.an.response);
585 virtio_scsi_complete_req(req);
586 } else {
587 assert(r == -EINPROGRESS);
588 }
589}
590
591static void virtio_scsi_handle_ctrl_vq(VirtIOSCSI *s, VirtQueue *vq)
592{
593 VirtIOSCSIReq *req;
594
595 while ((req = virtio_scsi_pop_req(s, vq))) {
596 virtio_scsi_handle_ctrl_req(s, req);
597 }
598}
599
600
601
602
603
604
605
606
607
608static bool virtio_scsi_defer_to_dataplane(VirtIOSCSI *s)
609{
610 if (!s->ctx || s->dataplane_started) {
611 return false;
612 }
613
614 virtio_device_start_ioeventfd(&s->parent_obj.parent_obj);
615 return !s->dataplane_fenced;
616}
617
618static void virtio_scsi_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
619{
620 VirtIOSCSI *s = (VirtIOSCSI *)vdev;
621
622 if (virtio_scsi_defer_to_dataplane(s)) {
623 return;
624 }
625
626 virtio_scsi_acquire(s);
627 virtio_scsi_handle_ctrl_vq(s, vq);
628 virtio_scsi_release(s);
629}
630
631static void virtio_scsi_complete_cmd_req(VirtIOSCSIReq *req)
632{
633 trace_virtio_scsi_cmd_resp(virtio_scsi_get_lun(req->req.cmd.lun),
634 req->req.cmd.tag,
635 req->resp.cmd.response,
636 req->resp.cmd.status);
637
638
639
640 req->resp_size = sizeof(VirtIOSCSICmdResp);
641 virtio_scsi_complete_req(req);
642}
643
644static void virtio_scsi_command_failed(SCSIRequest *r)
645{
646 VirtIOSCSIReq *req = r->hba_private;
647
648 if (r->io_canceled) {
649 return;
650 }
651
652 req->resp.cmd.status = GOOD;
653 switch (r->host_status) {
654 case SCSI_HOST_NO_LUN:
655 req->resp.cmd.response = VIRTIO_SCSI_S_INCORRECT_LUN;
656 break;
657 case SCSI_HOST_BUSY:
658 req->resp.cmd.response = VIRTIO_SCSI_S_BUSY;
659 break;
660 case SCSI_HOST_TIME_OUT:
661 case SCSI_HOST_ABORTED:
662 req->resp.cmd.response = VIRTIO_SCSI_S_ABORTED;
663 break;
664 case SCSI_HOST_BAD_RESPONSE:
665 req->resp.cmd.response = VIRTIO_SCSI_S_BAD_TARGET;
666 break;
667 case SCSI_HOST_RESET:
668 req->resp.cmd.response = VIRTIO_SCSI_S_RESET;
669 break;
670 case SCSI_HOST_TRANSPORT_DISRUPTED:
671 req->resp.cmd.response = VIRTIO_SCSI_S_TRANSPORT_FAILURE;
672 break;
673 case SCSI_HOST_TARGET_FAILURE:
674 req->resp.cmd.response = VIRTIO_SCSI_S_TARGET_FAILURE;
675 break;
676 case SCSI_HOST_RESERVATION_ERROR:
677 req->resp.cmd.response = VIRTIO_SCSI_S_NEXUS_FAILURE;
678 break;
679 case SCSI_HOST_ALLOCATION_FAILURE:
680 case SCSI_HOST_MEDIUM_ERROR:
681 case SCSI_HOST_ERROR:
682 default:
683 req->resp.cmd.response = VIRTIO_SCSI_S_FAILURE;
684 break;
685 }
686 virtio_scsi_complete_cmd_req(req);
687}
688
689static void virtio_scsi_command_complete(SCSIRequest *r, size_t resid)
690{
691 VirtIOSCSIReq *req = r->hba_private;
692 uint8_t sense[SCSI_SENSE_BUF_SIZE];
693 uint32_t sense_len;
694 VirtIODevice *vdev = VIRTIO_DEVICE(req->dev);
695
696 if (r->io_canceled) {
697 return;
698 }
699
700 req->resp.cmd.response = VIRTIO_SCSI_S_OK;
701 req->resp.cmd.status = r->status;
702 if (req->resp.cmd.status == GOOD) {
703 req->resp.cmd.resid = virtio_tswap32(vdev, resid);
704 } else {
705 req->resp.cmd.resid = 0;
706 sense_len = scsi_req_get_sense(r, sense, sizeof(sense));
707 sense_len = MIN(sense_len, req->resp_iov.size - sizeof(req->resp.cmd));
708 qemu_iovec_from_buf(&req->resp_iov, sizeof(req->resp.cmd),
709 sense, sense_len);
710 req->resp.cmd.sense_len = virtio_tswap32(vdev, sense_len);
711 }
712 virtio_scsi_complete_cmd_req(req);
713}
714
715static int virtio_scsi_parse_cdb(SCSIDevice *dev, SCSICommand *cmd,
716 uint8_t *buf, size_t buf_len,
717 void *hba_private)
718{
719 VirtIOSCSIReq *req = hba_private;
720
721 if (cmd->len == 0) {
722 cmd->len = MIN(VIRTIO_SCSI_CDB_DEFAULT_SIZE, SCSI_CMD_BUF_SIZE);
723 memcpy(cmd->buf, buf, cmd->len);
724 }
725
726
727
728
729 cmd->xfer = req->qsgl.size;
730 cmd->mode = req->mode;
731 return 0;
732}
733
734static QEMUSGList *virtio_scsi_get_sg_list(SCSIRequest *r)
735{
736 VirtIOSCSIReq *req = r->hba_private;
737
738 return &req->qsgl;
739}
740
741static void virtio_scsi_request_cancelled(SCSIRequest *r)
742{
743 VirtIOSCSIReq *req = r->hba_private;
744
745 if (!req) {
746 return;
747 }
748 if (qatomic_read(&req->dev->resetting)) {
749 req->resp.cmd.response = VIRTIO_SCSI_S_RESET;
750 } else {
751 req->resp.cmd.response = VIRTIO_SCSI_S_ABORTED;
752 }
753 virtio_scsi_complete_cmd_req(req);
754}
755
756static void virtio_scsi_fail_cmd_req(VirtIOSCSIReq *req)
757{
758 req->resp.cmd.response = VIRTIO_SCSI_S_FAILURE;
759 virtio_scsi_complete_cmd_req(req);
760}
761
762static int virtio_scsi_handle_cmd_req_prepare(VirtIOSCSI *s, VirtIOSCSIReq *req)
763{
764 VirtIOSCSICommon *vs = &s->parent_obj;
765 SCSIDevice *d;
766 int rc;
767
768 rc = virtio_scsi_parse_req(req, sizeof(VirtIOSCSICmdReq) + vs->cdb_size,
769 sizeof(VirtIOSCSICmdResp) + vs->sense_size);
770 if (rc < 0) {
771 if (rc == -ENOTSUP) {
772 virtio_scsi_fail_cmd_req(req);
773 return -ENOTSUP;
774 } else {
775 virtio_scsi_bad_req(req);
776 return -EINVAL;
777 }
778 }
779 trace_virtio_scsi_cmd_req(virtio_scsi_get_lun(req->req.cmd.lun),
780 req->req.cmd.tag, req->req.cmd.cdb[0]);
781
782 d = virtio_scsi_device_get(s, req->req.cmd.lun);
783 if (!d) {
784 req->resp.cmd.response = VIRTIO_SCSI_S_BAD_TARGET;
785 virtio_scsi_complete_cmd_req(req);
786 return -ENOENT;
787 }
788 virtio_scsi_ctx_check(s, d);
789 req->sreq = scsi_req_new(d, req->req.cmd.tag,
790 virtio_scsi_get_lun(req->req.cmd.lun),
791 req->req.cmd.cdb, vs->cdb_size, req);
792
793 if (req->sreq->cmd.mode != SCSI_XFER_NONE
794 && (req->sreq->cmd.mode != req->mode ||
795 req->sreq->cmd.xfer > req->qsgl.size)) {
796 req->resp.cmd.response = VIRTIO_SCSI_S_OVERRUN;
797 virtio_scsi_complete_cmd_req(req);
798 object_unref(OBJECT(d));
799 return -ENOBUFS;
800 }
801 scsi_req_ref(req->sreq);
802 blk_io_plug(d->conf.blk);
803 object_unref(OBJECT(d));
804 return 0;
805}
806
807static void virtio_scsi_handle_cmd_req_submit(VirtIOSCSI *s, VirtIOSCSIReq *req)
808{
809 SCSIRequest *sreq = req->sreq;
810 if (scsi_req_enqueue(sreq)) {
811 scsi_req_continue(sreq);
812 }
813 blk_io_unplug(sreq->dev->conf.blk);
814 scsi_req_unref(sreq);
815}
816
817static void virtio_scsi_handle_cmd_vq(VirtIOSCSI *s, VirtQueue *vq)
818{
819 VirtIOSCSIReq *req, *next;
820 int ret = 0;
821 bool suppress_notifications = virtio_queue_get_notification(vq);
822
823 QTAILQ_HEAD(, VirtIOSCSIReq) reqs = QTAILQ_HEAD_INITIALIZER(reqs);
824
825 do {
826 if (suppress_notifications) {
827 virtio_queue_set_notification(vq, 0);
828 }
829
830 while ((req = virtio_scsi_pop_req(s, vq))) {
831 ret = virtio_scsi_handle_cmd_req_prepare(s, req);
832 if (!ret) {
833 QTAILQ_INSERT_TAIL(&reqs, req, next);
834 } else if (ret == -EINVAL) {
835
836 while (!QTAILQ_EMPTY(&reqs)) {
837 req = QTAILQ_FIRST(&reqs);
838 QTAILQ_REMOVE(&reqs, req, next);
839 blk_io_unplug(req->sreq->dev->conf.blk);
840 scsi_req_unref(req->sreq);
841 virtqueue_detach_element(req->vq, &req->elem, 0);
842 virtio_scsi_free_req(req);
843 }
844 }
845 }
846
847 if (suppress_notifications) {
848 virtio_queue_set_notification(vq, 1);
849 }
850 } while (ret != -EINVAL && !virtio_queue_empty(vq));
851
852 QTAILQ_FOREACH_SAFE(req, &reqs, next, next) {
853 virtio_scsi_handle_cmd_req_submit(s, req);
854 }
855}
856
857static void virtio_scsi_handle_cmd(VirtIODevice *vdev, VirtQueue *vq)
858{
859
860 VirtIOSCSI *s = (VirtIOSCSI *)vdev;
861
862 if (virtio_scsi_defer_to_dataplane(s)) {
863 return;
864 }
865
866 virtio_scsi_acquire(s);
867 virtio_scsi_handle_cmd_vq(s, vq);
868 virtio_scsi_release(s);
869}
870
871static void virtio_scsi_get_config(VirtIODevice *vdev,
872 uint8_t *config)
873{
874 VirtIOSCSIConfig *scsiconf = (VirtIOSCSIConfig *)config;
875 VirtIOSCSICommon *s = VIRTIO_SCSI_COMMON(vdev);
876
877 virtio_stl_p(vdev, &scsiconf->num_queues, s->conf.num_queues);
878 virtio_stl_p(vdev, &scsiconf->seg_max,
879 s->conf.seg_max_adjust ? s->conf.virtqueue_size - 2 : 128 - 2);
880 virtio_stl_p(vdev, &scsiconf->max_sectors, s->conf.max_sectors);
881 virtio_stl_p(vdev, &scsiconf->cmd_per_lun, s->conf.cmd_per_lun);
882 virtio_stl_p(vdev, &scsiconf->event_info_size, sizeof(VirtIOSCSIEvent));
883 virtio_stl_p(vdev, &scsiconf->sense_size, s->sense_size);
884 virtio_stl_p(vdev, &scsiconf->cdb_size, s->cdb_size);
885 virtio_stw_p(vdev, &scsiconf->max_channel, VIRTIO_SCSI_MAX_CHANNEL);
886 virtio_stw_p(vdev, &scsiconf->max_target, VIRTIO_SCSI_MAX_TARGET);
887 virtio_stl_p(vdev, &scsiconf->max_lun, VIRTIO_SCSI_MAX_LUN);
888}
889
890static void virtio_scsi_set_config(VirtIODevice *vdev,
891 const uint8_t *config)
892{
893 VirtIOSCSIConfig *scsiconf = (VirtIOSCSIConfig *)config;
894 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
895
896 if ((uint32_t) virtio_ldl_p(vdev, &scsiconf->sense_size) >= 65536 ||
897 (uint32_t) virtio_ldl_p(vdev, &scsiconf->cdb_size) >= 256) {
898 virtio_error(vdev,
899 "bad data written to virtio-scsi configuration space");
900 return;
901 }
902
903 vs->sense_size = virtio_ldl_p(vdev, &scsiconf->sense_size);
904 vs->cdb_size = virtio_ldl_p(vdev, &scsiconf->cdb_size);
905}
906
907static uint64_t virtio_scsi_get_features(VirtIODevice *vdev,
908 uint64_t requested_features,
909 Error **errp)
910{
911 VirtIOSCSI *s = VIRTIO_SCSI(vdev);
912
913
914 requested_features |= s->host_features;
915 return requested_features;
916}
917
918static void virtio_scsi_reset(VirtIODevice *vdev)
919{
920 VirtIOSCSI *s = VIRTIO_SCSI(vdev);
921 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
922
923 assert(!s->dataplane_started);
924
925 virtio_scsi_reset_tmf_bh(s);
926
927 qatomic_inc(&s->resetting);
928 bus_cold_reset(BUS(&s->bus));
929 qatomic_dec(&s->resetting);
930
931 vs->sense_size = VIRTIO_SCSI_SENSE_DEFAULT_SIZE;
932 vs->cdb_size = VIRTIO_SCSI_CDB_DEFAULT_SIZE;
933 s->events_dropped = false;
934}
935
936static void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev,
937 uint32_t event, uint32_t reason)
938{
939 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s);
940 VirtIOSCSIReq *req;
941 VirtIOSCSIEvent *evt;
942 VirtIODevice *vdev = VIRTIO_DEVICE(s);
943
944 if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) {
945 return;
946 }
947
948 req = virtio_scsi_pop_req(s, vs->event_vq);
949 if (!req) {
950 s->events_dropped = true;
951 return;
952 }
953
954 if (s->events_dropped) {
955 event |= VIRTIO_SCSI_T_EVENTS_MISSED;
956 s->events_dropped = false;
957 }
958
959 if (virtio_scsi_parse_req(req, 0, sizeof(VirtIOSCSIEvent))) {
960 virtio_scsi_bad_req(req);
961 return;
962 }
963
964 evt = &req->resp.event;
965 memset(evt, 0, sizeof(VirtIOSCSIEvent));
966 evt->event = virtio_tswap32(vdev, event);
967 evt->reason = virtio_tswap32(vdev, reason);
968 if (!dev) {
969 assert(event == VIRTIO_SCSI_T_EVENTS_MISSED);
970 } else {
971 evt->lun[0] = 1;
972 evt->lun[1] = dev->id;
973
974
975 if (dev->lun >= 256) {
976 evt->lun[2] = (dev->lun >> 8) | 0x40;
977 }
978 evt->lun[3] = dev->lun & 0xFF;
979 }
980 trace_virtio_scsi_event(virtio_scsi_get_lun(evt->lun), event, reason);
981
982 virtio_scsi_complete_req(req);
983}
984
985static void virtio_scsi_handle_event_vq(VirtIOSCSI *s, VirtQueue *vq)
986{
987 if (s->events_dropped) {
988 virtio_scsi_push_event(s, NULL, VIRTIO_SCSI_T_NO_EVENT, 0);
989 }
990}
991
992static void virtio_scsi_handle_event(VirtIODevice *vdev, VirtQueue *vq)
993{
994 VirtIOSCSI *s = VIRTIO_SCSI(vdev);
995
996 if (virtio_scsi_defer_to_dataplane(s)) {
997 return;
998 }
999
1000 virtio_scsi_acquire(s);
1001 virtio_scsi_handle_event_vq(s, vq);
1002 virtio_scsi_release(s);
1003}
1004
1005static void virtio_scsi_change(SCSIBus *bus, SCSIDevice *dev, SCSISense sense)
1006{
1007 VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus);
1008 VirtIODevice *vdev = VIRTIO_DEVICE(s);
1009
1010 if (virtio_vdev_has_feature(vdev, VIRTIO_SCSI_F_CHANGE) &&
1011 dev->type != TYPE_ROM) {
1012 virtio_scsi_acquire(s);
1013 virtio_scsi_push_event(s, dev, VIRTIO_SCSI_T_PARAM_CHANGE,
1014 sense.asc | (sense.ascq << 8));
1015 virtio_scsi_release(s);
1016 }
1017}
1018
1019static void virtio_scsi_pre_hotplug(HotplugHandler *hotplug_dev,
1020 DeviceState *dev, Error **errp)
1021{
1022 SCSIDevice *sd = SCSI_DEVICE(dev);
1023 sd->hba_supports_iothread = true;
1024}
1025
1026static void virtio_scsi_hotplug(HotplugHandler *hotplug_dev, DeviceState *dev,
1027 Error **errp)
1028{
1029 VirtIODevice *vdev = VIRTIO_DEVICE(hotplug_dev);
1030 VirtIOSCSI *s = VIRTIO_SCSI(vdev);
1031 SCSIDevice *sd = SCSI_DEVICE(dev);
1032 AioContext *old_context;
1033 int ret;
1034
1035 if (s->ctx && !s->dataplane_fenced) {
1036 if (blk_op_is_blocked(sd->conf.blk, BLOCK_OP_TYPE_DATAPLANE, errp)) {
1037 return;
1038 }
1039 old_context = blk_get_aio_context(sd->conf.blk);
1040 aio_context_acquire(old_context);
1041 ret = blk_set_aio_context(sd->conf.blk, s->ctx, errp);
1042 aio_context_release(old_context);
1043 if (ret < 0) {
1044 return;
1045 }
1046 }
1047
1048 if (virtio_vdev_has_feature(vdev, VIRTIO_SCSI_F_HOTPLUG)) {
1049 virtio_scsi_acquire(s);
1050 virtio_scsi_push_event(s, sd,
1051 VIRTIO_SCSI_T_TRANSPORT_RESET,
1052 VIRTIO_SCSI_EVT_RESET_RESCAN);
1053 scsi_bus_set_ua(&s->bus, SENSE_CODE(REPORTED_LUNS_CHANGED));
1054 virtio_scsi_release(s);
1055 }
1056}
1057
1058static void virtio_scsi_hotunplug(HotplugHandler *hotplug_dev, DeviceState *dev,
1059 Error **errp)
1060{
1061 VirtIODevice *vdev = VIRTIO_DEVICE(hotplug_dev);
1062 VirtIOSCSI *s = VIRTIO_SCSI(vdev);
1063 SCSIDevice *sd = SCSI_DEVICE(dev);
1064 AioContext *ctx = s->ctx ?: qemu_get_aio_context();
1065
1066 if (virtio_vdev_has_feature(vdev, VIRTIO_SCSI_F_HOTPLUG)) {
1067 virtio_scsi_acquire(s);
1068 virtio_scsi_push_event(s, sd,
1069 VIRTIO_SCSI_T_TRANSPORT_RESET,
1070 VIRTIO_SCSI_EVT_RESET_REMOVED);
1071 scsi_bus_set_ua(&s->bus, SENSE_CODE(REPORTED_LUNS_CHANGED));
1072 virtio_scsi_release(s);
1073 }
1074
1075 aio_disable_external(ctx);
1076 qdev_simple_device_unplug_cb(hotplug_dev, dev, errp);
1077 aio_enable_external(ctx);
1078
1079 if (s->ctx) {
1080 virtio_scsi_acquire(s);
1081
1082 blk_set_aio_context(sd->conf.blk, qemu_get_aio_context(), NULL);
1083 virtio_scsi_release(s);
1084 }
1085}
1086
1087static struct SCSIBusInfo virtio_scsi_scsi_info = {
1088 .tcq = true,
1089 .max_channel = VIRTIO_SCSI_MAX_CHANNEL,
1090 .max_target = VIRTIO_SCSI_MAX_TARGET,
1091 .max_lun = VIRTIO_SCSI_MAX_LUN,
1092
1093 .complete = virtio_scsi_command_complete,
1094 .fail = virtio_scsi_command_failed,
1095 .cancel = virtio_scsi_request_cancelled,
1096 .change = virtio_scsi_change,
1097 .parse_cdb = virtio_scsi_parse_cdb,
1098 .get_sg_list = virtio_scsi_get_sg_list,
1099 .save_request = virtio_scsi_save_request,
1100 .load_request = virtio_scsi_load_request,
1101};
1102
1103void virtio_scsi_common_realize(DeviceState *dev,
1104 VirtIOHandleOutput ctrl,
1105 VirtIOHandleOutput evt,
1106 VirtIOHandleOutput cmd,
1107 Error **errp)
1108{
1109 VirtIODevice *vdev = VIRTIO_DEVICE(dev);
1110 VirtIOSCSICommon *s = VIRTIO_SCSI_COMMON(dev);
1111 int i;
1112
1113 virtio_init(vdev, VIRTIO_ID_SCSI, sizeof(VirtIOSCSIConfig));
1114
1115 if (s->conf.num_queues == VIRTIO_SCSI_AUTO_NUM_QUEUES) {
1116 s->conf.num_queues = 1;
1117 }
1118 if (s->conf.num_queues == 0 ||
1119 s->conf.num_queues > VIRTIO_QUEUE_MAX - VIRTIO_SCSI_VQ_NUM_FIXED) {
1120 error_setg(errp, "Invalid number of queues (= %" PRIu32 "), "
1121 "must be a positive integer less than %d.",
1122 s->conf.num_queues,
1123 VIRTIO_QUEUE_MAX - VIRTIO_SCSI_VQ_NUM_FIXED);
1124 virtio_cleanup(vdev);
1125 return;
1126 }
1127 if (s->conf.virtqueue_size <= 2) {
1128 error_setg(errp, "invalid virtqueue_size property (= %" PRIu32 "), "
1129 "must be > 2", s->conf.virtqueue_size);
1130 return;
1131 }
1132 s->cmd_vqs = g_new0(VirtQueue *, s->conf.num_queues);
1133 s->sense_size = VIRTIO_SCSI_SENSE_DEFAULT_SIZE;
1134 s->cdb_size = VIRTIO_SCSI_CDB_DEFAULT_SIZE;
1135
1136 s->ctrl_vq = virtio_add_queue(vdev, s->conf.virtqueue_size, ctrl);
1137 s->event_vq = virtio_add_queue(vdev, s->conf.virtqueue_size, evt);
1138 for (i = 0; i < s->conf.num_queues; i++) {
1139 s->cmd_vqs[i] = virtio_add_queue(vdev, s->conf.virtqueue_size, cmd);
1140 }
1141}
1142
1143static void virtio_scsi_device_realize(DeviceState *dev, Error **errp)
1144{
1145 VirtIODevice *vdev = VIRTIO_DEVICE(dev);
1146 VirtIOSCSI *s = VIRTIO_SCSI(dev);
1147 Error *err = NULL;
1148
1149 QTAILQ_INIT(&s->tmf_bh_list);
1150
1151 virtio_scsi_common_realize(dev,
1152 virtio_scsi_handle_ctrl,
1153 virtio_scsi_handle_event,
1154 virtio_scsi_handle_cmd,
1155 &err);
1156 if (err != NULL) {
1157 error_propagate(errp, err);
1158 return;
1159 }
1160
1161 scsi_bus_init_named(&s->bus, sizeof(s->bus), dev,
1162 &virtio_scsi_scsi_info, vdev->bus_name);
1163
1164 qbus_set_hotplug_handler(BUS(&s->bus), OBJECT(dev));
1165
1166 virtio_scsi_dataplane_setup(s, errp);
1167}
1168
1169void virtio_scsi_common_unrealize(DeviceState *dev)
1170{
1171 VirtIODevice *vdev = VIRTIO_DEVICE(dev);
1172 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(dev);
1173 int i;
1174
1175 virtio_delete_queue(vs->ctrl_vq);
1176 virtio_delete_queue(vs->event_vq);
1177 for (i = 0; i < vs->conf.num_queues; i++) {
1178 virtio_delete_queue(vs->cmd_vqs[i]);
1179 }
1180 g_free(vs->cmd_vqs);
1181 virtio_cleanup(vdev);
1182}
1183
1184static void virtio_scsi_device_unrealize(DeviceState *dev)
1185{
1186 VirtIOSCSI *s = VIRTIO_SCSI(dev);
1187
1188 virtio_scsi_reset_tmf_bh(s);
1189
1190 qbus_set_hotplug_handler(BUS(&s->bus), NULL);
1191 virtio_scsi_common_unrealize(dev);
1192}
1193
1194static Property virtio_scsi_properties[] = {
1195 DEFINE_PROP_UINT32("num_queues", VirtIOSCSI, parent_obj.conf.num_queues,
1196 VIRTIO_SCSI_AUTO_NUM_QUEUES),
1197 DEFINE_PROP_UINT32("virtqueue_size", VirtIOSCSI,
1198 parent_obj.conf.virtqueue_size, 256),
1199 DEFINE_PROP_BOOL("seg_max_adjust", VirtIOSCSI,
1200 parent_obj.conf.seg_max_adjust, true),
1201 DEFINE_PROP_UINT32("max_sectors", VirtIOSCSI, parent_obj.conf.max_sectors,
1202 0xFFFF),
1203 DEFINE_PROP_UINT32("cmd_per_lun", VirtIOSCSI, parent_obj.conf.cmd_per_lun,
1204 128),
1205 DEFINE_PROP_BIT("hotplug", VirtIOSCSI, host_features,
1206 VIRTIO_SCSI_F_HOTPLUG, true),
1207 DEFINE_PROP_BIT("param_change", VirtIOSCSI, host_features,
1208 VIRTIO_SCSI_F_CHANGE, true),
1209 DEFINE_PROP_LINK("iothread", VirtIOSCSI, parent_obj.conf.iothread,
1210 TYPE_IOTHREAD, IOThread *),
1211 DEFINE_PROP_END_OF_LIST(),
1212};
1213
1214static const VMStateDescription vmstate_virtio_scsi = {
1215 .name = "virtio-scsi",
1216 .minimum_version_id = 1,
1217 .version_id = 1,
1218 .fields = (VMStateField[]) {
1219 VMSTATE_VIRTIO_DEVICE,
1220 VMSTATE_END_OF_LIST()
1221 },
1222};
1223
1224static void virtio_scsi_common_class_init(ObjectClass *klass, void *data)
1225{
1226 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
1227 DeviceClass *dc = DEVICE_CLASS(klass);
1228
1229 vdc->get_config = virtio_scsi_get_config;
1230 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1231}
1232
1233static void virtio_scsi_class_init(ObjectClass *klass, void *data)
1234{
1235 DeviceClass *dc = DEVICE_CLASS(klass);
1236 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
1237 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
1238
1239 device_class_set_props(dc, virtio_scsi_properties);
1240 dc->vmsd = &vmstate_virtio_scsi;
1241 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1242 vdc->realize = virtio_scsi_device_realize;
1243 vdc->unrealize = virtio_scsi_device_unrealize;
1244 vdc->set_config = virtio_scsi_set_config;
1245 vdc->get_features = virtio_scsi_get_features;
1246 vdc->reset = virtio_scsi_reset;
1247 vdc->start_ioeventfd = virtio_scsi_dataplane_start;
1248 vdc->stop_ioeventfd = virtio_scsi_dataplane_stop;
1249 hc->pre_plug = virtio_scsi_pre_hotplug;
1250 hc->plug = virtio_scsi_hotplug;
1251 hc->unplug = virtio_scsi_hotunplug;
1252}
1253
1254static const TypeInfo virtio_scsi_common_info = {
1255 .name = TYPE_VIRTIO_SCSI_COMMON,
1256 .parent = TYPE_VIRTIO_DEVICE,
1257 .instance_size = sizeof(VirtIOSCSICommon),
1258 .abstract = true,
1259 .class_init = virtio_scsi_common_class_init,
1260};
1261
1262static const TypeInfo virtio_scsi_info = {
1263 .name = TYPE_VIRTIO_SCSI,
1264 .parent = TYPE_VIRTIO_SCSI_COMMON,
1265 .instance_size = sizeof(VirtIOSCSI),
1266 .class_init = virtio_scsi_class_init,
1267 .interfaces = (InterfaceInfo[]) {
1268 { TYPE_HOTPLUG_HANDLER },
1269 { }
1270 }
1271};
1272
1273static void virtio_register_types(void)
1274{
1275 type_register_static(&virtio_scsi_common_info);
1276 type_register_static(&virtio_scsi_info);
1277}
1278
1279type_init(virtio_register_types)
1280
