1 #include "qemu/osdep.h"
2 #include "qapi/error.h"
3 #include "qemu/error-report.h"
4 #include "qemu/module.h"
5 #include "qemu/option.h"
6 #include "qemu/hw-version.h"
7 #include "hw/qdev-properties.h"
8 #include "hw/scsi/scsi.h"
9 #include "migration/qemu-file-types.h"
10 #include "migration/vmstate.h"
11 #include "scsi/constants.h"
12 #include "sysemu/block-backend.h"
13 #include "sysemu/blockdev.h"
14 #include "sysemu/sysemu.h"
15 #include "sysemu/runstate.h"
16 #include "trace.h"
17 #include "sysemu/dma.h"
18 #include "qemu/cutils.h"
19
20 static char *scsibus_get_dev_path(DeviceState *dev);
21 static char *scsibus_get_fw_dev_path(DeviceState *dev);
22 static void scsi_req_dequeue(SCSIRequest *req);
23 static uint8_t *scsi_target_alloc_buf(SCSIRequest *req, size_t len);
24 static void scsi_target_free_buf(SCSIRequest *req);
25 static void scsi_clear_reported_luns_changed(SCSIRequest *req);
26
27 static int next_scsi_bus;
28
do_scsi_device_find(SCSIBus * bus,int channel,int id,int lun,bool include_unrealized)29 static SCSIDevice *do_scsi_device_find(SCSIBus *bus,
30 int channel, int id, int lun,
31 bool include_unrealized)
32 {
33 BusChild *kid;
34 SCSIDevice *retval = NULL;
35
36 QTAILQ_FOREACH_RCU(kid, &bus->qbus.children, sibling) {
37 DeviceState *qdev = kid->child;
38 SCSIDevice *dev = SCSI_DEVICE(qdev);
39
40 if (dev->channel == channel && dev->id == id) {
41 if (dev->lun == lun) {
42 retval = dev;
43 break;
44 }
45
46 /*
47 * If we don't find exact match (channel/bus/lun),
48 * we will return the first device which matches channel/bus
49 */
50
51 if (!retval) {
52 retval = dev;
53 }
54 }
55 }
56
57 /*
58 * This function might run on the IO thread and we might race against
59 * main thread hot-plugging the device.
60 * We assume that as soon as .realized is set to true we can let
61 * the user access the device.
62 */
63
64 if (retval && !include_unrealized && !qdev_is_realized(&retval->qdev)) {
65 retval = NULL;
66 }
67
68 return retval;
69 }
70
scsi_device_find(SCSIBus * bus,int channel,int id,int lun)71 SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int id, int lun)
72 {
73 RCU_READ_LOCK_GUARD();
74 return do_scsi_device_find(bus, channel, id, lun, false);
75 }
76
scsi_device_get(SCSIBus * bus,int channel,int id,int lun)77 SCSIDevice *scsi_device_get(SCSIBus *bus, int channel, int id, int lun)
78 {
79 SCSIDevice *d;
80 RCU_READ_LOCK_GUARD();
81 d = do_scsi_device_find(bus, channel, id, lun, false);
82 if (d) {
83 object_ref(d);
84 }
85 return d;
86 }
87
scsi_device_realize(SCSIDevice * s,Error ** errp)88 static void scsi_device_realize(SCSIDevice *s, Error **errp)
89 {
90 SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
91 if (sc->realize) {
92 sc->realize(s, errp);
93 }
94 }
95
scsi_device_unrealize(SCSIDevice * s)96 static void scsi_device_unrealize(SCSIDevice *s)
97 {
98 SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
99 if (sc->unrealize) {
100 sc->unrealize(s);
101 }
102 }
103
scsi_bus_parse_cdb(SCSIDevice * dev,SCSICommand * cmd,uint8_t * buf,size_t buf_len,void * hba_private)104 int scsi_bus_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf,
105 size_t buf_len, void *hba_private)
106 {
107 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus);
108 int rc;
109
110 assert(cmd->len == 0);
111 rc = scsi_req_parse_cdb(dev, cmd, buf, buf_len);
112 if (bus->info->parse_cdb) {
113 rc = bus->info->parse_cdb(dev, cmd, buf, buf_len, hba_private);
114 }
115 return rc;
116 }
117
scsi_device_alloc_req(SCSIDevice * s,uint32_t tag,uint32_t lun,uint8_t * buf,void * hba_private)118 static SCSIRequest *scsi_device_alloc_req(SCSIDevice *s, uint32_t tag, uint32_t lun,
119 uint8_t *buf, void *hba_private)
120 {
121 SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
122 if (sc->alloc_req) {
123 return sc->alloc_req(s, tag, lun, buf, hba_private);
124 }
125
126 return NULL;
127 }
128
scsi_device_unit_attention_reported(SCSIDevice * s)129 void scsi_device_unit_attention_reported(SCSIDevice *s)
130 {
131 SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
132 if (sc->unit_attention_reported) {
133 sc->unit_attention_reported(s);
134 }
135 }
136
137 /* Create a scsi bus, and attach devices to it. */
scsi_bus_init_named(SCSIBus * bus,size_t bus_size,DeviceState * host,const SCSIBusInfo * info,const char * bus_name)138 void scsi_bus_init_named(SCSIBus *bus, size_t bus_size, DeviceState *host,
139 const SCSIBusInfo *info, const char *bus_name)
140 {
141 qbus_init(bus, bus_size, TYPE_SCSI_BUS, host, bus_name);
142 bus->busnr = next_scsi_bus++;
143 bus->info = info;
144 qbus_set_bus_hotplug_handler(BUS(bus));
145 }
146
scsi_dma_restart_bh(void * opaque)147 static void scsi_dma_restart_bh(void *opaque)
148 {
149 SCSIDevice *s = opaque;
150 SCSIRequest *req, *next;
151
152 qemu_bh_delete(s->bh);
153 s->bh = NULL;
154
155 aio_context_acquire(blk_get_aio_context(s->conf.blk));
156 QTAILQ_FOREACH_SAFE(req, &s->requests, next, next) {
157 scsi_req_ref(req);
158 if (req->retry) {
159 req->retry = false;
160 switch (req->cmd.mode) {
161 case SCSI_XFER_FROM_DEV:
162 case SCSI_XFER_TO_DEV:
163 scsi_req_continue(req);
164 break;
165 case SCSI_XFER_NONE:
166 scsi_req_dequeue(req);
167 scsi_req_enqueue(req);
168 break;
169 }
170 }
171 scsi_req_unref(req);
172 }
173 aio_context_release(blk_get_aio_context(s->conf.blk));
174 /* Drop the reference that was acquired in scsi_dma_restart_cb */
175 object_unref(OBJECT(s));
176 }
177
scsi_req_retry(SCSIRequest * req)178 void scsi_req_retry(SCSIRequest *req)
179 {
180 /* No need to save a reference, because scsi_dma_restart_bh just
181 * looks at the request list. */
182 req->retry = true;
183 }
184
scsi_dma_restart_cb(void * opaque,bool running,RunState state)185 static void scsi_dma_restart_cb(void *opaque, bool running, RunState state)
186 {
187 SCSIDevice *s = opaque;
188
189 if (!running) {
190 return;
191 }
192 if (!s->bh) {
193 AioContext *ctx = blk_get_aio_context(s->conf.blk);
194 /* The reference is dropped in scsi_dma_restart_bh.*/
195 object_ref(OBJECT(s));
196 s->bh = aio_bh_new_guarded(ctx, scsi_dma_restart_bh, s,
197 &DEVICE(s)->mem_reentrancy_guard);
198 qemu_bh_schedule(s->bh);
199 }
200 }
201
scsi_bus_is_address_free(SCSIBus * bus,int channel,int target,int lun,SCSIDevice ** p_dev)202 static bool scsi_bus_is_address_free(SCSIBus *bus,
203 int channel, int target, int lun,
204 SCSIDevice **p_dev)
205 {
206 SCSIDevice *d;
207
208 RCU_READ_LOCK_GUARD();
209 d = do_scsi_device_find(bus, channel, target, lun, true);
210 if (d && d->lun == lun) {
211 if (p_dev) {
212 *p_dev = d;
213 }
214 return false;
215 }
216 if (p_dev) {
217 *p_dev = NULL;
218 }
219 return true;
220 }
221
scsi_bus_check_address(BusState * qbus,DeviceState * qdev,Error ** errp)222 static bool scsi_bus_check_address(BusState *qbus, DeviceState *qdev, Error **errp)
223 {
224 SCSIDevice *dev = SCSI_DEVICE(qdev);
225 SCSIBus *bus = SCSI_BUS(qbus);
226
227 if (dev->channel > bus->info->max_channel) {
228 error_setg(errp, "bad scsi channel id: %d", dev->channel);
229 return false;
230 }
231 if (dev->id != -1 && dev->id > bus->info->max_target) {
232 error_setg(errp, "bad scsi device id: %d", dev->id);
233 return false;
234 }
235 if (dev->lun != -1 && dev->lun > bus->info->max_lun) {
236 error_setg(errp, "bad scsi device lun: %d", dev->lun);
237 return false;
238 }
239
240 if (dev->id != -1 && dev->lun != -1) {
241 SCSIDevice *d;
242 if (!scsi_bus_is_address_free(bus, dev->channel, dev->id, dev->lun, &d)) {
243 error_setg(errp, "lun already used by '%s'", d->qdev.id);
244 return false;
245 }
246 }
247
248 return true;
249 }
250
scsi_qdev_realize(DeviceState * qdev,Error ** errp)251 static void scsi_qdev_realize(DeviceState *qdev, Error **errp)
252 {
253 SCSIDevice *dev = SCSI_DEVICE(qdev);
254 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus);
255 bool is_free;
256 Error *local_err = NULL;
257
258 if (dev->id == -1) {
259 int id = -1;
260 if (dev->lun == -1) {
261 dev->lun = 0;
262 }
263 do {
264 is_free = scsi_bus_is_address_free(bus, dev->channel, ++id, dev->lun, NULL);
265 } while (!is_free && id < bus->info->max_target);
266 if (!is_free) {
267 error_setg(errp, "no free target");
268 return;
269 }
270 dev->id = id;
271 } else if (dev->lun == -1) {
272 int lun = -1;
273 do {
274 is_free = scsi_bus_is_address_free(bus, dev->channel, dev->id, ++lun, NULL);
275 } while (!is_free && lun < bus->info->max_lun);
276 if (!is_free) {
277 error_setg(errp, "no free lun");
278 return;
279 }
280 dev->lun = lun;
281 }
282
283 QTAILQ_INIT(&dev->requests);
284 scsi_device_realize(dev, &local_err);
285 if (local_err) {
286 error_propagate(errp, local_err);
287 return;
288 }
289 dev->vmsentry = qdev_add_vm_change_state_handler(DEVICE(dev),
290 scsi_dma_restart_cb, dev);
291 }
292
scsi_qdev_unrealize(DeviceState * qdev)293 static void scsi_qdev_unrealize(DeviceState *qdev)
294 {
295 SCSIDevice *dev = SCSI_DEVICE(qdev);
296
297 if (dev->vmsentry) {
298 qemu_del_vm_change_state_handler(dev->vmsentry);
299 }
300
301 scsi_device_purge_requests(dev, SENSE_CODE(NO_SENSE));
302
303 scsi_device_unrealize(dev);
304
305 blockdev_mark_auto_del(dev->conf.blk);
306 }
307
308 /* handle legacy '-drive if=scsi,...' cmd line args */
scsi_bus_legacy_add_drive(SCSIBus * bus,BlockBackend * blk,int unit,bool removable,int bootindex,bool share_rw,BlockdevOnError rerror,BlockdevOnError werror,const char * serial,Error ** errp)309 SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockBackend *blk,
310 int unit, bool removable, int bootindex,
311 bool share_rw,
312 BlockdevOnError rerror,
313 BlockdevOnError werror,
314 const char *serial, Error **errp)
315 {
316 const char *driver;
317 char *name;
318 DeviceState *dev;
319 DriveInfo *dinfo;
320
321 if (blk_is_sg(blk)) {
322 driver = "scsi-generic";
323 } else {
324 dinfo = blk_legacy_dinfo(blk);
325 if (dinfo && dinfo->media_cd) {
326 driver = "scsi-cd";
327 } else {
328 driver = "scsi-hd";
329 }
330 }
331 dev = qdev_new(driver);
332 name = g_strdup_printf("legacy[%d]", unit);
333 object_property_add_child(OBJECT(bus), name, OBJECT(dev));
334 g_free(name);
335
336 qdev_prop_set_uint32(dev, "scsi-id", unit);
337 if (bootindex >= 0) {
338 object_property_set_int(OBJECT(dev), "bootindex", bootindex,
339 &error_abort);
340 }
341 if (object_property_find(OBJECT(dev), "removable")) {
342 qdev_prop_set_bit(dev, "removable", removable);
343 }
344 if (serial && object_property_find(OBJECT(dev), "serial")) {
345 qdev_prop_set_string(dev, "serial", serial);
346 }
347 if (!qdev_prop_set_drive_err(dev, "drive", blk, errp)) {
348 object_unparent(OBJECT(dev));
349 return NULL;
350 }
351 if (!object_property_set_bool(OBJECT(dev), "share-rw", share_rw, errp)) {
352 object_unparent(OBJECT(dev));
353 return NULL;
354 }
355
356 qdev_prop_set_enum(dev, "rerror", rerror);
357 qdev_prop_set_enum(dev, "werror", werror);
358
359 if (!qdev_realize_and_unref(dev, &bus->qbus, errp)) {
360 object_unparent(OBJECT(dev));
361 return NULL;
362 }
363 return SCSI_DEVICE(dev);
364 }
365
scsi_bus_legacy_handle_cmdline(SCSIBus * bus)366 void scsi_bus_legacy_handle_cmdline(SCSIBus *bus)
367 {
368 Location loc;
369 DriveInfo *dinfo;
370 int unit;
371
372 loc_push_none(&loc);
373 for (unit = 0; unit <= bus->info->max_target; unit++) {
374 dinfo = drive_get(IF_SCSI, bus->busnr, unit);
375 if (dinfo == NULL) {
376 continue;
377 }
378 qemu_opts_loc_restore(dinfo->opts);
379 scsi_bus_legacy_add_drive(bus, blk_by_legacy_dinfo(dinfo),
380 unit, false, -1, false,
381 BLOCKDEV_ON_ERROR_AUTO,
382 BLOCKDEV_ON_ERROR_AUTO,
383 NULL, &error_fatal);
384 }
385 loc_pop(&loc);
386 }
387
scsi_invalid_field(SCSIRequest * req,uint8_t * buf)388 static int32_t scsi_invalid_field(SCSIRequest *req, uint8_t *buf)
389 {
390 scsi_req_build_sense(req, SENSE_CODE(INVALID_FIELD));
391 scsi_req_complete(req, CHECK_CONDITION);
392 return 0;
393 }
394
395 static const struct SCSIReqOps reqops_invalid_field = {
396 .size = sizeof(SCSIRequest),
397 .send_command = scsi_invalid_field
398 };
399
400 /* SCSIReqOps implementation for invalid commands. */
401
scsi_invalid_command(SCSIRequest * req,uint8_t * buf)402 static int32_t scsi_invalid_command(SCSIRequest *req, uint8_t *buf)
403 {
404 scsi_req_build_sense(req, SENSE_CODE(INVALID_OPCODE));
405 scsi_req_complete(req, CHECK_CONDITION);
406 return 0;
407 }
408
409 static const struct SCSIReqOps reqops_invalid_opcode = {
410 .size = sizeof(SCSIRequest),
411 .send_command = scsi_invalid_command
412 };
413
414 /* SCSIReqOps implementation for unit attention conditions. */
415
scsi_fetch_unit_attention_sense(SCSIRequest * req)416 static void scsi_fetch_unit_attention_sense(SCSIRequest *req)
417 {
418 SCSISense *ua = NULL;
419
420 if (req->dev->unit_attention.key == UNIT_ATTENTION) {
421 ua = &req->dev->unit_attention;
422 } else if (req->bus->unit_attention.key == UNIT_ATTENTION) {
423 ua = &req->bus->unit_attention;
424 }
425
426 /*
427 * Fetch the unit attention sense immediately so that another
428 * scsi_req_new does not use reqops_unit_attention.
429 */
430 if (ua) {
431 scsi_req_build_sense(req, *ua);
432 *ua = SENSE_CODE(NO_SENSE);
433 }
434 }
435
scsi_unit_attention(SCSIRequest * req,uint8_t * buf)436 static int32_t scsi_unit_attention(SCSIRequest *req, uint8_t *buf)
437 {
438 scsi_req_complete(req, CHECK_CONDITION);
439 return 0;
440 }
441
442 static const struct SCSIReqOps reqops_unit_attention = {
443 .size = sizeof(SCSIRequest),
444 .init_req = scsi_fetch_unit_attention_sense,
445 .send_command = scsi_unit_attention
446 };
447
448 /* SCSIReqOps implementation for REPORT LUNS and for commands sent to
449 an invalid LUN. */
450
451 typedef struct SCSITargetReq SCSITargetReq;
452
453 struct SCSITargetReq {
454 SCSIRequest req;
455 int len;
456 uint8_t *buf;
457 int buf_len;
458 };
459
store_lun(uint8_t * outbuf,int lun)460 static void store_lun(uint8_t *outbuf, int lun)
461 {
462 if (lun < 256) {
463 /* Simple logical unit addressing method*/
464 outbuf[0] = 0;
465 outbuf[1] = lun;
466 } else {
467 /* Flat space addressing method */
468 outbuf[0] = 0x40 | (lun >> 8);
469 outbuf[1] = (lun & 255);
470 }
471 }
472
scsi_target_emulate_report_luns(SCSITargetReq * r)473 static bool scsi_target_emulate_report_luns(SCSITargetReq *r)
474 {
475 BusChild *kid;
476 int channel, id;
477 uint8_t tmp[8] = {0};
478 int len = 0;
479 GByteArray *buf;
480
481 if (r->req.cmd.xfer < 16) {
482 return false;
483 }
484 if (r->req.cmd.buf[2] > 2) {
485 return false;
486 }
487
488 /* reserve space for 63 LUNs*/
489 buf = g_byte_array_sized_new(512);
490
491 channel = r->req.dev->channel;
492 id = r->req.dev->id;
493
494 /* add size (will be updated later to correct value */
495 g_byte_array_append(buf, tmp, 8);
496 len += 8;
497
498 /* add LUN0 */
499 g_byte_array_append(buf, tmp, 8);
500 len += 8;
501
502 WITH_RCU_READ_LOCK_GUARD() {
503 QTAILQ_FOREACH_RCU(kid, &r->req.bus->qbus.children, sibling) {
504 DeviceState *qdev = kid->child;
505 SCSIDevice *dev = SCSI_DEVICE(qdev);
506
507 if (dev->channel == channel && dev->id == id && dev->lun != 0 &&
508 qdev_is_realized(&dev->qdev)) {
509 store_lun(tmp, dev->lun);
510 g_byte_array_append(buf, tmp, 8);
511 len += 8;
512 }
513 }
514 }
515
516 r->buf_len = len;
517 r->buf = g_byte_array_free(buf, FALSE);
518 r->len = MIN(len, r->req.cmd.xfer & ~7);
519
520 /* store the LUN list length */
521 stl_be_p(&r->buf[0], len - 8);
522
523 /*
524 * If a REPORT LUNS command enters the enabled command state, [...]
525 * the device server shall clear any pending unit attention condition
526 * with an additional sense code of REPORTED LUNS DATA HAS CHANGED.
527 */
528 scsi_clear_reported_luns_changed(&r->req);
529
530 return true;
531 }
532
scsi_target_emulate_inquiry(SCSITargetReq * r)533 static bool scsi_target_emulate_inquiry(SCSITargetReq *r)
534 {
535 assert(r->req.dev->lun != r->req.lun);
536
537 scsi_target_alloc_buf(&r->req, SCSI_INQUIRY_LEN);
538
539 if (r->req.cmd.buf[1] & 0x2) {
540 /* Command support data - optional, not implemented */
541 return false;
542 }
543
544 if (r->req.cmd.buf[1] & 0x1) {
545 /* Vital product data */
546 uint8_t page_code = r->req.cmd.buf[2];
547 r->buf[r->len++] = page_code ; /* this page */
548 r->buf[r->len++] = 0x00;
549
550 switch (page_code) {
551 case 0x00: /* Supported page codes, mandatory */
552 {
553 int pages;
554 pages = r->len++;
555 r->buf[r->len++] = 0x00; /* list of supported pages (this page) */
556 r->buf[pages] = r->len - pages - 1; /* number of pages */
557 break;
558 }
559 default:
560 return false;
561 }
562 /* done with EVPD */
563 assert(r->len < r->buf_len);
564 r->len = MIN(r->req.cmd.xfer, r->len);
565 return true;
566 }
567
568 /* Standard INQUIRY data */
569 if (r->req.cmd.buf[2] != 0) {
570 return false;
571 }
572
573 /* PAGE CODE == 0 */
574 r->len = MIN(r->req.cmd.xfer, SCSI_INQUIRY_LEN);
575 memset(r->buf, 0, r->len);
576 if (r->req.lun != 0) {
577 r->buf[0] = TYPE_NO_LUN;
578 } else {
579 r->buf[0] = TYPE_NOT_PRESENT | TYPE_INACTIVE;
580 r->buf[2] = 5; /* Version */
581 r->buf[3] = 2 | 0x10; /* HiSup, response data format */
582 r->buf[4] = r->len - 5; /* Additional Length = (Len - 1) - 4 */
583 r->buf[7] = 0x10 | (r->req.bus->info->tcq ? 0x02 : 0); /* Sync, TCQ. */
584 memcpy(&r->buf[8], "QEMU ", 8);
585 memcpy(&r->buf[16], "QEMU TARGET ", 16);
586 pstrcpy((char *) &r->buf[32], 4, qemu_hw_version());
587 }
588 return true;
589 }
590
scsi_sense_len(SCSIRequest * req)591 static size_t scsi_sense_len(SCSIRequest *req)
592 {
593 if (req->dev->type == TYPE_SCANNER)
594 return SCSI_SENSE_LEN_SCANNER;
595 else
596 return SCSI_SENSE_LEN;
597 }
598
scsi_target_send_command(SCSIRequest * req,uint8_t * buf)599 static int32_t scsi_target_send_command(SCSIRequest *req, uint8_t *buf)
600 {
601 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req);
602 int fixed_sense = (req->cmd.buf[1] & 1) == 0;
603
604 if (req->lun != 0 &&
605 buf[0] != INQUIRY && buf[0] != REQUEST_SENSE) {
606 scsi_req_build_sense(req, SENSE_CODE(LUN_NOT_SUPPORTED));
607 scsi_req_complete(req, CHECK_CONDITION);
608 return 0;
609 }
610 switch (buf[0]) {
611 case REPORT_LUNS:
612 if (!scsi_target_emulate_report_luns(r)) {
613 goto illegal_request;
614 }
615 break;
616 case INQUIRY:
617 if (!scsi_target_emulate_inquiry(r)) {
618 goto illegal_request;
619 }
620 break;
621 case REQUEST_SENSE:
622 scsi_target_alloc_buf(&r->req, scsi_sense_len(req));
623 if (req->lun != 0) {
624 const struct SCSISense sense = SENSE_CODE(LUN_NOT_SUPPORTED);
625
626 r->len = scsi_build_sense_buf(r->buf, req->cmd.xfer,
627 sense, fixed_sense);
628 } else {
629 r->len = scsi_device_get_sense(r->req.dev, r->buf,
630 MIN(req->cmd.xfer, r->buf_len),
631 fixed_sense);
632 }
633 if (r->req.dev->sense_is_ua) {
634 scsi_device_unit_attention_reported(req->dev);
635 r->req.dev->sense_len = 0;
636 r->req.dev->sense_is_ua = false;
637 }
638 break;
639 case TEST_UNIT_READY:
640 break;
641 default:
642 scsi_req_build_sense(req, SENSE_CODE(INVALID_OPCODE));
643 scsi_req_complete(req, CHECK_CONDITION);
644 return 0;
645 illegal_request:
646 scsi_req_build_sense(req, SENSE_CODE(INVALID_FIELD));
647 scsi_req_complete(req, CHECK_CONDITION);
648 return 0;
649 }
650
651 if (!r->len) {
652 scsi_req_complete(req, GOOD);
653 }
654 return r->len;
655 }
656
scsi_target_read_data(SCSIRequest * req)657 static void scsi_target_read_data(SCSIRequest *req)
658 {
659 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req);
660 uint32_t n;
661
662 n = r->len;
663 if (n > 0) {
664 r->len = 0;
665 scsi_req_data(&r->req, n);
666 } else {
667 scsi_req_complete(&r->req, GOOD);
668 }
669 }
670
scsi_target_get_buf(SCSIRequest * req)671 static uint8_t *scsi_target_get_buf(SCSIRequest *req)
672 {
673 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req);
674
675 return r->buf;
676 }
677
scsi_target_alloc_buf(SCSIRequest * req,size_t len)678 static uint8_t *scsi_target_alloc_buf(SCSIRequest *req, size_t len)
679 {
680 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req);
681
682 r->buf = g_malloc(len);
683 r->buf_len = len;
684
685 return r->buf;
686 }
687
scsi_target_free_buf(SCSIRequest * req)688 static void scsi_target_free_buf(SCSIRequest *req)
689 {
690 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req);
691
692 g_free(r->buf);
693 }
694
695 static const struct SCSIReqOps reqops_target_command = {
696 .size = sizeof(SCSITargetReq),
697 .send_command = scsi_target_send_command,
698 .read_data = scsi_target_read_data,
699 .get_buf = scsi_target_get_buf,
700 .free_req = scsi_target_free_buf,
701 };
702
703
scsi_req_alloc(const SCSIReqOps * reqops,SCSIDevice * d,uint32_t tag,uint32_t lun,void * hba_private)704 SCSIRequest *scsi_req_alloc(const SCSIReqOps *reqops, SCSIDevice *d,
705 uint32_t tag, uint32_t lun, void *hba_private)
706 {
707 SCSIRequest *req;
708 SCSIBus *bus = scsi_bus_from_device(d);
709 BusState *qbus = BUS(bus);
710 const int memset_off = offsetof(SCSIRequest, sense)
711 + sizeof(req->sense);
712
713 req = g_malloc(reqops->size);
714 memset((uint8_t *)req + memset_off, 0, reqops->size - memset_off);
715 req->refcount = 1;
716 req->bus = bus;
717 req->dev = d;
718 req->tag = tag;
719 req->lun = lun;
720 req->hba_private = hba_private;
721 req->status = -1;
722 req->host_status = -1;
723 req->ops = reqops;
724 object_ref(OBJECT(d));
725 object_ref(OBJECT(qbus->parent));
726 notifier_list_init(&req->cancel_notifiers);
727
728 if (reqops->init_req) {
729 reqops->init_req(req);
730 }
731
732 trace_scsi_req_alloc(req->dev->id, req->lun, req->tag);
733 return req;
734 }
735
scsi_req_new(SCSIDevice * d,uint32_t tag,uint32_t lun,uint8_t * buf,size_t buf_len,void * hba_private)736 SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun,
737 uint8_t *buf, size_t buf_len, void *hba_private)
738 {
739 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus);
740 const SCSIReqOps *ops;
741 SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(d);
742 SCSIRequest *req;
743 SCSICommand cmd = { .len = 0 };
744 int ret;
745
746 if (buf_len == 0) {
747 trace_scsi_req_parse_bad(d->id, lun, tag, 0);
748 goto invalid_opcode;
749 }
750
751 if ((d->unit_attention.key == UNIT_ATTENTION ||
752 bus->unit_attention.key == UNIT_ATTENTION) &&
753 (buf[0] != INQUIRY &&
754 buf[0] != REPORT_LUNS &&
755 buf[0] != GET_CONFIGURATION &&
756 buf[0] != GET_EVENT_STATUS_NOTIFICATION &&
757
758 /*
759 * If we already have a pending unit attention condition,
760 * report this one before triggering another one.
761 */
762 !(buf[0] == REQUEST_SENSE && d->sense_is_ua))) {
763 ops = &reqops_unit_attention;
764 } else if (lun != d->lun ||
765 buf[0] == REPORT_LUNS ||
766 (buf[0] == REQUEST_SENSE && d->sense_len)) {
767 ops = &reqops_target_command;
768 } else {
769 ops = NULL;
770 }
771
772 if (ops != NULL || !sc->parse_cdb) {
773 ret = scsi_req_parse_cdb(d, &cmd, buf, buf_len);
774 } else {
775 ret = sc->parse_cdb(d, &cmd, buf, buf_len, hba_private);
776 }
777
778 if (ret != 0) {
779 trace_scsi_req_parse_bad(d->id, lun, tag, buf[0]);
780 invalid_opcode:
781 req = scsi_req_alloc(&reqops_invalid_opcode, d, tag, lun, hba_private);
782 } else {
783 assert(cmd.len != 0);
784 trace_scsi_req_parsed(d->id, lun, tag, buf[0],
785 cmd.mode, cmd.xfer);
786 if (cmd.lba != -1) {
787 trace_scsi_req_parsed_lba(d->id, lun, tag, buf[0],
788 cmd.lba);
789 }
790
791 if (cmd.xfer > INT32_MAX) {
792 req = scsi_req_alloc(&reqops_invalid_field, d, tag, lun, hba_private);
793 } else if (ops) {
794 req = scsi_req_alloc(ops, d, tag, lun, hba_private);
795 } else {
796 req = scsi_device_alloc_req(d, tag, lun, buf, hba_private);
797 }
798 }
799
800 req->cmd = cmd;
801 req->residual = req->cmd.xfer;
802
803 switch (buf[0]) {
804 case INQUIRY:
805 trace_scsi_inquiry(d->id, lun, tag, cmd.buf[1], cmd.buf[2]);
806 break;
807 case TEST_UNIT_READY:
808 trace_scsi_test_unit_ready(d->id, lun, tag);
809 break;
810 case REPORT_LUNS:
811 trace_scsi_report_luns(d->id, lun, tag);
812 break;
813 case REQUEST_SENSE:
814 trace_scsi_request_sense(d->id, lun, tag);
815 break;
816 default:
817 break;
818 }
819
820 return req;
821 }
822
scsi_req_get_buf(SCSIRequest * req)823 uint8_t *scsi_req_get_buf(SCSIRequest *req)
824 {
825 return req->ops->get_buf(req);
826 }
827
scsi_clear_reported_luns_changed(SCSIRequest * req)828 static void scsi_clear_reported_luns_changed(SCSIRequest *req)
829 {
830 SCSISense *ua;
831
832 if (req->dev->unit_attention.key == UNIT_ATTENTION) {
833 ua = &req->dev->unit_attention;
834 } else if (req->bus->unit_attention.key == UNIT_ATTENTION) {
835 ua = &req->bus->unit_attention;
836 } else {
837 return;
838 }
839
840 if (ua->asc == SENSE_CODE(REPORTED_LUNS_CHANGED).asc &&
841 ua->ascq == SENSE_CODE(REPORTED_LUNS_CHANGED).ascq) {
842 *ua = SENSE_CODE(NO_SENSE);
843 }
844 }
845
scsi_req_get_sense(SCSIRequest * req,uint8_t * buf,int len)846 int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len)
847 {
848 int ret;
849
850 assert(len >= 14);
851 if (!req->sense_len) {
852 return 0;
853 }
854
855 ret = scsi_convert_sense(req->sense, req->sense_len, buf, len, true);
856
857 /*
858 * FIXME: clearing unit attention conditions upon autosense should be done
859 * only if the UA_INTLCK_CTRL field in the Control mode page is set to 00b
860 * (SAM-5, 5.14).
861 *
862 * We assume UA_INTLCK_CTRL to be 00b for HBAs that support autosense, and
863 * 10b for HBAs that do not support it (do not call scsi_req_get_sense).
864 * Here we handle unit attention clearing for UA_INTLCK_CTRL == 00b.
865 */
866 if (req->dev->sense_is_ua) {
867 scsi_device_unit_attention_reported(req->dev);
868 req->dev->sense_len = 0;
869 req->dev->sense_is_ua = false;
870 }
871 return ret;
872 }
873
scsi_device_get_sense(SCSIDevice * dev,uint8_t * buf,int len,bool fixed)874 int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf, int len, bool fixed)
875 {
876 return scsi_convert_sense(dev->sense, dev->sense_len, buf, len, fixed);
877 }
878
scsi_req_build_sense(SCSIRequest * req,SCSISense sense)879 void scsi_req_build_sense(SCSIRequest *req, SCSISense sense)
880 {
881 trace_scsi_req_build_sense(req->dev->id, req->lun, req->tag,
882 sense.key, sense.asc, sense.ascq);
883 req->sense_len = scsi_build_sense(req->sense, sense);
884 }
885
scsi_req_enqueue_internal(SCSIRequest * req)886 static void scsi_req_enqueue_internal(SCSIRequest *req)
887 {
888 assert(!req->enqueued);
889 scsi_req_ref(req);
890 if (req->bus->info->get_sg_list) {
891 req->sg = req->bus->info->get_sg_list(req);
892 } else {
893 req->sg = NULL;
894 }
895 req->enqueued = true;
896 QTAILQ_INSERT_TAIL(&req->dev->requests, req, next);
897 }
898
scsi_req_enqueue(SCSIRequest * req)899 int32_t scsi_req_enqueue(SCSIRequest *req)
900 {
901 int32_t rc;
902
903 assert(!req->retry);
904 scsi_req_enqueue_internal(req);
905 scsi_req_ref(req);
906 rc = req->ops->send_command(req, req->cmd.buf);
907 scsi_req_unref(req);
908 return rc;
909 }
910
scsi_req_dequeue(SCSIRequest * req)911 static void scsi_req_dequeue(SCSIRequest *req)
912 {
913 trace_scsi_req_dequeue(req->dev->id, req->lun, req->tag);
914 req->retry = false;
915 if (req->enqueued) {
916 QTAILQ_REMOVE(&req->dev->requests, req, next);
917 req->enqueued = false;
918 scsi_req_unref(req);
919 }
920 }
921
scsi_get_performance_length(int num_desc,int type,int data_type)922 static int scsi_get_performance_length(int num_desc, int type, int data_type)
923 {
924 /* MMC-6, paragraph 6.7. */
925 switch (type) {
926 case 0:
927 if ((data_type & 3) == 0) {
928 /* Each descriptor is as in Table 295 - Nominal performance. */
929 return 16 * num_desc + 8;
930 } else {
931 /* Each descriptor is as in Table 296 - Exceptions. */
932 return 6 * num_desc + 8;
933 }
934 case 1:
935 case 4:
936 case 5:
937 return 8 * num_desc + 8;
938 case 2:
939 return 2048 * num_desc + 8;
940 case 3:
941 return 16 * num_desc + 8;
942 default:
943 return 8;
944 }
945 }
946
ata_passthrough_xfer_unit(SCSIDevice * dev,uint8_t * buf)947 static int ata_passthrough_xfer_unit(SCSIDevice *dev, uint8_t *buf)
948 {
949 int byte_block = (buf[2] >> 2) & 0x1;
950 int type = (buf[2] >> 4) & 0x1;
951 int xfer_unit;
952
953 if (byte_block) {
954 if (type) {
955 xfer_unit = dev->blocksize;
956 } else {
957 xfer_unit = 512;
958 }
959 } else {
960 xfer_unit = 1;
961 }
962
963 return xfer_unit;
964 }
965
ata_passthrough_12_xfer(SCSIDevice * dev,uint8_t * buf)966 static int ata_passthrough_12_xfer(SCSIDevice *dev, uint8_t *buf)
967 {
968 int length = buf[2] & 0x3;
969 int xfer;
970 int unit = ata_passthrough_xfer_unit(dev, buf);
971
972 switch (length) {
973 case 0:
974 case 3: /* USB-specific. */
975 default:
976 xfer = 0;
977 break;
978 case 1:
979 xfer = buf[3];
980 break;
981 case 2:
982 xfer = buf[4];
983 break;
984 }
985
986 return xfer * unit;
987 }
988
ata_passthrough_16_xfer(SCSIDevice * dev,uint8_t * buf)989 static int ata_passthrough_16_xfer(SCSIDevice *dev, uint8_t *buf)
990 {
991 int extend = buf[1] & 0x1;
992 int length = buf[2] & 0x3;
993 int xfer;
994 int unit = ata_passthrough_xfer_unit(dev, buf);
995
996 switch (length) {
997 case 0:
998 case 3: /* USB-specific. */
999 default:
1000 xfer = 0;
1001 break;
1002 case 1:
1003 xfer = buf[4];
1004 xfer |= (extend ? buf[3] << 8 : 0);
1005 break;
1006 case 2:
1007 xfer = buf[6];
1008 xfer |= (extend ? buf[5] << 8 : 0);
1009 break;
1010 }
1011
1012 return xfer * unit;
1013 }
1014
scsi_req_xfer(SCSICommand * cmd,SCSIDevice * dev,uint8_t * buf)1015 static int scsi_req_xfer(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
1016 {
1017 cmd->xfer = scsi_cdb_xfer(buf);
1018 switch (buf[0]) {
1019 case TEST_UNIT_READY:
1020 case REWIND:
1021 case START_STOP:
1022 case SET_CAPACITY:
1023 case WRITE_FILEMARKS:
1024 case WRITE_FILEMARKS_16:
1025 case SPACE:
1026 case RESERVE:
1027 case RELEASE:
1028 case ERASE:
1029 case ALLOW_MEDIUM_REMOVAL:
1030 case SEEK_10:
1031 case SYNCHRONIZE_CACHE:
1032 case SYNCHRONIZE_CACHE_16:
1033 case LOCATE_16:
1034 case LOCK_UNLOCK_CACHE:
1035 case SET_CD_SPEED:
1036 case SET_LIMITS:
1037 case WRITE_LONG_10:
1038 case UPDATE_BLOCK:
1039 case RESERVE_TRACK:
1040 case SET_READ_AHEAD:
1041 case PRE_FETCH:
1042 case PRE_FETCH_16:
1043 case ALLOW_OVERWRITE:
1044 cmd->xfer = 0;
1045 break;
1046 case VERIFY_10:
1047 case VERIFY_12:
1048 case VERIFY_16:
1049 if ((buf[1] & 2) == 0) {
1050 cmd->xfer = 0;
1051 } else if ((buf[1] & 4) != 0) {
1052 cmd->xfer = 1;
1053 }
1054 cmd->xfer *= dev->blocksize;
1055 break;
1056 case MODE_SENSE:
1057 break;
1058 case WRITE_SAME_10:
1059 case WRITE_SAME_16:
1060 cmd->xfer = buf[1] & 1 ? 0 : dev->blocksize;
1061 break;
1062 case READ_CAPACITY_10:
1063 cmd->xfer = 8;
1064 break;
1065 case READ_BLOCK_LIMITS:
1066 cmd->xfer = 6;
1067 break;
1068 case SEND_VOLUME_TAG:
1069 /* GPCMD_SET_STREAMING from multimedia commands. */
1070 if (dev->type == TYPE_ROM) {
1071 cmd->xfer = buf[10] | (buf[9] << 8);
1072 } else {
1073 cmd->xfer = buf[9] | (buf[8] << 8);
1074 }
1075 break;
1076 case WRITE_6:
1077 /* length 0 means 256 blocks */
1078 if (cmd->xfer == 0) {
1079 cmd->xfer = 256;
1080 }
1081 /* fall through */
1082 case WRITE_10:
1083 case WRITE_VERIFY_10:
1084 case WRITE_12:
1085 case WRITE_VERIFY_12:
1086 case WRITE_16:
1087 case WRITE_VERIFY_16:
1088 cmd->xfer *= dev->blocksize;
1089 break;
1090 case READ_6:
1091 case READ_REVERSE:
1092 /* length 0 means 256 blocks */
1093 if (cmd->xfer == 0) {
1094 cmd->xfer = 256;
1095 }
1096 /* fall through */
1097 case READ_10:
1098 case READ_12:
1099 case READ_16:
1100 cmd->xfer *= dev->blocksize;
1101 break;
1102 case FORMAT_UNIT:
1103 /* MMC mandates the parameter list to be 12-bytes long. Parameters
1104 * for block devices are restricted to the header right now. */
1105 if (dev->type == TYPE_ROM && (buf[1] & 16)) {
1106 cmd->xfer = 12;
1107 } else {
1108 cmd->xfer = (buf[1] & 16) == 0 ? 0 : (buf[1] & 32 ? 8 : 4);
1109 }
1110 break;
1111 case INQUIRY:
1112 case RECEIVE_DIAGNOSTIC:
1113 case SEND_DIAGNOSTIC:
1114 cmd->xfer = buf[4] | (buf[3] << 8);
1115 break;
1116 case READ_CD:
1117 case READ_BUFFER:
1118 case WRITE_BUFFER:
1119 case SEND_CUE_SHEET:
1120 cmd->xfer = buf[8] | (buf[7] << 8) | (buf[6] << 16);
1121 break;
1122 case PERSISTENT_RESERVE_OUT:
1123 cmd->xfer = ldl_be_p(&buf[5]) & 0xffffffffULL;
1124 break;
1125 case ERASE_12:
1126 if (dev->type == TYPE_ROM) {
1127 /* MMC command GET PERFORMANCE. */
1128 cmd->xfer = scsi_get_performance_length(buf[9] | (buf[8] << 8),
1129 buf[10], buf[1] & 0x1f);
1130 }
1131 break;
1132 case MECHANISM_STATUS:
1133 case READ_DVD_STRUCTURE:
1134 case SEND_DVD_STRUCTURE:
1135 case MAINTENANCE_OUT:
1136 case MAINTENANCE_IN:
1137 if (dev->type == TYPE_ROM) {
1138 /* GPCMD_REPORT_KEY and GPCMD_SEND_KEY from multi media commands */
1139 cmd->xfer = buf[9] | (buf[8] << 8);
1140 }
1141 break;
1142 case ATA_PASSTHROUGH_12:
1143 if (dev->type == TYPE_ROM) {
1144 /* BLANK command of MMC */
1145 cmd->xfer = 0;
1146 } else {
1147 cmd->xfer = ata_passthrough_12_xfer(dev, buf);
1148 }
1149 break;
1150 case ATA_PASSTHROUGH_16:
1151 cmd->xfer = ata_passthrough_16_xfer(dev, buf);
1152 break;
1153 }
1154 return 0;
1155 }
1156
scsi_req_stream_xfer(SCSICommand * cmd,SCSIDevice * dev,uint8_t * buf)1157 static int scsi_req_stream_xfer(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
1158 {
1159 switch (buf[0]) {
1160 /* stream commands */
1161 case ERASE_12:
1162 case ERASE_16:
1163 cmd->xfer = 0;
1164 break;
1165 case READ_6:
1166 case READ_REVERSE:
1167 case RECOVER_BUFFERED_DATA:
1168 case WRITE_6:
1169 cmd->xfer = buf[4] | (buf[3] << 8) | (buf[2] << 16);
1170 if (buf[1] & 0x01) { /* fixed */
1171 cmd->xfer *= dev->blocksize;
1172 }
1173 break;
1174 case READ_16:
1175 case READ_REVERSE_16:
1176 case VERIFY_16:
1177 case WRITE_16:
1178 cmd->xfer = buf[14] | (buf[13] << 8) | (buf[12] << 16);
1179 if (buf[1] & 0x01) { /* fixed */
1180 cmd->xfer *= dev->blocksize;
1181 }
1182 break;
1183 case REWIND:
1184 case LOAD_UNLOAD:
1185 cmd->xfer = 0;
1186 break;
1187 case SPACE_16:
1188 cmd->xfer = buf[13] | (buf[12] << 8);
1189 break;
1190 case READ_POSITION:
1191 switch (buf[1] & 0x1f) /* operation code */ {
1192 case SHORT_FORM_BLOCK_ID:
1193 case SHORT_FORM_VENDOR_SPECIFIC:
1194 cmd->xfer = 20;
1195 break;
1196 case LONG_FORM:
1197 cmd->xfer = 32;
1198 break;
1199 case EXTENDED_FORM:
1200 cmd->xfer = buf[8] | (buf[7] << 8);
1201 break;
1202 default:
1203 return -1;
1204 }
1205
1206 break;
1207 case FORMAT_UNIT:
1208 cmd->xfer = buf[4] | (buf[3] << 8);
1209 break;
1210 /* generic commands */
1211 default:
1212 return scsi_req_xfer(cmd, dev, buf);
1213 }
1214 return 0;
1215 }
1216
scsi_req_medium_changer_xfer(SCSICommand * cmd,SCSIDevice * dev,uint8_t * buf)1217 static int scsi_req_medium_changer_xfer(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
1218 {
1219 switch (buf[0]) {
1220 /* medium changer commands */
1221 case EXCHANGE_MEDIUM:
1222 case INITIALIZE_ELEMENT_STATUS:
1223 case INITIALIZE_ELEMENT_STATUS_WITH_RANGE:
1224 case MOVE_MEDIUM:
1225 case POSITION_TO_ELEMENT:
1226 cmd->xfer = 0;
1227 break;
1228 case READ_ELEMENT_STATUS:
1229 cmd->xfer = buf[9] | (buf[8] << 8) | (buf[7] << 16);
1230 break;
1231
1232 /* generic commands */
1233 default:
1234 return scsi_req_xfer(cmd, dev, buf);
1235 }
1236 return 0;
1237 }
1238
scsi_req_scanner_length(SCSICommand * cmd,SCSIDevice * dev,uint8_t * buf)1239 static int scsi_req_scanner_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
1240 {
1241 switch (buf[0]) {
1242 /* Scanner commands */
1243 case OBJECT_POSITION:
1244 cmd->xfer = 0;
1245 break;
1246 case SCAN:
1247 cmd->xfer = buf[4];
1248 break;
1249 case READ_10:
1250 case SEND:
1251 case GET_WINDOW:
1252 case SET_WINDOW:
1253 cmd->xfer = buf[8] | (buf[7] << 8) | (buf[6] << 16);
1254 break;
1255 default:
1256 /* GET_DATA_BUFFER_STATUS xfer handled by scsi_req_xfer */
1257 return scsi_req_xfer(cmd, dev, buf);
1258 }
1259
1260 return 0;
1261 }
1262
scsi_cmd_xfer_mode(SCSICommand * cmd)1263 static void scsi_cmd_xfer_mode(SCSICommand *cmd)
1264 {
1265 if (!cmd->xfer) {
1266 cmd->mode = SCSI_XFER_NONE;
1267 return;
1268 }
1269 switch (cmd->buf[0]) {
1270 case WRITE_6:
1271 case WRITE_10:
1272 case WRITE_VERIFY_10:
1273 case WRITE_12:
1274 case WRITE_VERIFY_12:
1275 case WRITE_16:
1276 case WRITE_VERIFY_16:
1277 case VERIFY_10:
1278 case VERIFY_12:
1279 case VERIFY_16:
1280 case COPY:
1281 case COPY_VERIFY:
1282 case COMPARE:
1283 case CHANGE_DEFINITION:
1284 case LOG_SELECT:
1285 case MODE_SELECT:
1286 case MODE_SELECT_10:
1287 case SEND_DIAGNOSTIC:
1288 case WRITE_BUFFER:
1289 case FORMAT_UNIT:
1290 case REASSIGN_BLOCKS:
1291 case SEARCH_EQUAL:
1292 case SEARCH_HIGH:
1293 case SEARCH_LOW:
1294 case UPDATE_BLOCK:
1295 case WRITE_LONG_10:
1296 case WRITE_SAME_10:
1297 case WRITE_SAME_16:
1298 case UNMAP:
1299 case SEARCH_HIGH_12:
1300 case SEARCH_EQUAL_12:
1301 case SEARCH_LOW_12:
1302 case MEDIUM_SCAN:
1303 case SEND_VOLUME_TAG:
1304 case SEND_CUE_SHEET:
1305 case SEND_DVD_STRUCTURE:
1306 case PERSISTENT_RESERVE_OUT:
1307 case MAINTENANCE_OUT:
1308 case SET_WINDOW:
1309 case SCAN:
1310 /* SCAN conflicts with START_STOP. START_STOP has cmd->xfer set to 0 for
1311 * non-scanner devices, so we only get here for SCAN and not for START_STOP.
1312 */
1313 cmd->mode = SCSI_XFER_TO_DEV;
1314 break;
1315 case ATA_PASSTHROUGH_12:
1316 case ATA_PASSTHROUGH_16:
1317 /* T_DIR */
1318 cmd->mode = (cmd->buf[2] & 0x8) ?
1319 SCSI_XFER_FROM_DEV : SCSI_XFER_TO_DEV;
1320 break;
1321 default:
1322 cmd->mode = SCSI_XFER_FROM_DEV;
1323 break;
1324 }
1325 }
1326
scsi_req_parse_cdb(SCSIDevice * dev,SCSICommand * cmd,uint8_t * buf,size_t buf_len)1327 int scsi_req_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf,
1328 size_t buf_len)
1329 {
1330 int rc;
1331 int len;
1332
1333 cmd->lba = -1;
1334 len = scsi_cdb_length(buf);
1335 if (len < 0 || len > buf_len) {
1336 return -1;
1337 }
1338
1339 cmd->len = len;
1340 switch (dev->type) {
1341 case TYPE_TAPE:
1342 rc = scsi_req_stream_xfer(cmd, dev, buf);
1343 break;
1344 case TYPE_MEDIUM_CHANGER:
1345 rc = scsi_req_medium_changer_xfer(cmd, dev, buf);
1346 break;
1347 case TYPE_SCANNER:
1348 rc = scsi_req_scanner_length(cmd, dev, buf);
1349 break;
1350 default:
1351 rc = scsi_req_xfer(cmd, dev, buf);
1352 break;
1353 }
1354
1355 if (rc != 0)
1356 return rc;
1357
1358 memcpy(cmd->buf, buf, cmd->len);
1359 scsi_cmd_xfer_mode(cmd);
1360 cmd->lba = scsi_cmd_lba(cmd);
1361 return 0;
1362 }
1363
scsi_device_report_change(SCSIDevice * dev,SCSISense sense)1364 void scsi_device_report_change(SCSIDevice *dev, SCSISense sense)
1365 {
1366 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus);
1367
1368 scsi_device_set_ua(dev, sense);
1369 if (bus->info->change) {
1370 bus->info->change(bus, dev, sense);
1371 }
1372 }
1373
scsi_req_ref(SCSIRequest * req)1374 SCSIRequest *scsi_req_ref(SCSIRequest *req)
1375 {
1376 assert(req->refcount > 0);
1377 req->refcount++;
1378 return req;
1379 }
1380
scsi_req_unref(SCSIRequest * req)1381 void scsi_req_unref(SCSIRequest *req)
1382 {
1383 assert(req->refcount > 0);
1384 if (--req->refcount == 0) {
1385 BusState *qbus = req->dev->qdev.parent_bus;
1386 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, qbus);
1387
1388 if (bus->info->free_request && req->hba_private) {
1389 bus->info->free_request(bus, req->hba_private);
1390 }
1391 if (req->ops->free_req) {
1392 req->ops->free_req(req);
1393 }
1394 object_unref(OBJECT(req->dev));
1395 object_unref(OBJECT(qbus->parent));
1396 g_free(req);
1397 }
1398 }
1399
1400 /* Tell the device that we finished processing this chunk of I/O. It
1401 will start the next chunk or complete the command. */
scsi_req_continue(SCSIRequest * req)1402 void scsi_req_continue(SCSIRequest *req)
1403 {
1404 if (req->io_canceled) {
1405 trace_scsi_req_continue_canceled(req->dev->id, req->lun, req->tag);
1406 return;
1407 }
1408 trace_scsi_req_continue(req->dev->id, req->lun, req->tag);
1409 if (req->cmd.mode == SCSI_XFER_TO_DEV) {
1410 req->ops->write_data(req);
1411 } else {
1412 req->ops->read_data(req);
1413 }
1414 }
1415
1416 /* Called by the devices when data is ready for the HBA. The HBA should
1417 start a DMA operation to read or fill the device's data buffer.
1418 Once it completes, calling scsi_req_continue will restart I/O. */
scsi_req_data(SCSIRequest * req,int len)1419 void scsi_req_data(SCSIRequest *req, int len)
1420 {
1421 uint8_t *buf;
1422 if (req->io_canceled) {
1423 trace_scsi_req_data_canceled(req->dev->id, req->lun, req->tag, len);
1424 return;
1425 }
1426 trace_scsi_req_data(req->dev->id, req->lun, req->tag, len);
1427 assert(req->cmd.mode != SCSI_XFER_NONE);
1428 if (!req->sg) {
1429 req->residual -= len;
1430 req->bus->info->transfer_data(req, len);
1431 return;
1432 }
1433
1434 /* If the device calls scsi_req_data and the HBA specified a
1435 * scatter/gather list, the transfer has to happen in a single
1436 * step. */
1437 assert(!req->dma_started);
1438 req->dma_started = true;
1439
1440 buf = scsi_req_get_buf(req);
1441 if (req->cmd.mode == SCSI_XFER_FROM_DEV) {
1442 dma_buf_read(buf, len, &req->residual, req->sg,
1443 MEMTXATTRS_UNSPECIFIED);
1444 } else {
1445 dma_buf_write(buf, len, &req->residual, req->sg,
1446 MEMTXATTRS_UNSPECIFIED);
1447 }
1448 scsi_req_continue(req);
1449 }
1450
scsi_req_print(SCSIRequest * req)1451 void scsi_req_print(SCSIRequest *req)
1452 {
1453 FILE *fp = stderr;
1454 int i;
1455
1456 fprintf(fp, "[%s id=%d] %s",
1457 req->dev->qdev.parent_bus->name,
1458 req->dev->id,
1459 scsi_command_name(req->cmd.buf[0]));
1460 for (i = 1; i < req->cmd.len; i++) {
1461 fprintf(fp, " 0x%02x", req->cmd.buf[i]);
1462 }
1463 switch (req->cmd.mode) {
1464 case SCSI_XFER_NONE:
1465 fprintf(fp, " - none\n");
1466 break;
1467 case SCSI_XFER_FROM_DEV:
1468 fprintf(fp, " - from-dev len=%zd\n", req->cmd.xfer);
1469 break;
1470 case SCSI_XFER_TO_DEV:
1471 fprintf(fp, " - to-dev len=%zd\n", req->cmd.xfer);
1472 break;
1473 default:
1474 fprintf(fp, " - Oops\n");
1475 break;
1476 }
1477 }
1478
scsi_req_complete_failed(SCSIRequest * req,int host_status)1479 void scsi_req_complete_failed(SCSIRequest *req, int host_status)
1480 {
1481 SCSISense sense;
1482 int status;
1483
1484 assert(req->status == -1 && req->host_status == -1);
1485 assert(req->ops != &reqops_unit_attention);
1486
1487 if (!req->bus->info->fail) {
1488 status = scsi_sense_from_host_status(req->host_status, &sense);
1489 if (status == CHECK_CONDITION) {
1490 scsi_req_build_sense(req, sense);
1491 }
1492 scsi_req_complete(req, status);
1493 return;
1494 }
1495
1496 req->host_status = host_status;
1497 scsi_req_ref(req);
1498 scsi_req_dequeue(req);
1499 req->bus->info->fail(req);
1500
1501 /* Cancelled requests might end up being completed instead of cancelled */
1502 notifier_list_notify(&req->cancel_notifiers, req);
1503 scsi_req_unref(req);
1504 }
1505
scsi_req_complete(SCSIRequest * req,int status)1506 void scsi_req_complete(SCSIRequest *req, int status)
1507 {
1508 assert(req->status == -1 && req->host_status == -1);
1509 req->status = status;
1510 req->host_status = SCSI_HOST_OK;
1511
1512 assert(req->sense_len <= sizeof(req->sense));
1513 if (status == GOOD) {
1514 req->sense_len = 0;
1515 }
1516
1517 if (req->sense_len) {
1518 memcpy(req->dev->sense, req->sense, req->sense_len);
1519 req->dev->sense_len = req->sense_len;
1520 req->dev->sense_is_ua = (req->ops == &reqops_unit_attention);
1521 } else {
1522 req->dev->sense_len = 0;
1523 req->dev->sense_is_ua = false;
1524 }
1525
1526 scsi_req_ref(req);
1527 scsi_req_dequeue(req);
1528 req->bus->info->complete(req, req->residual);
1529
1530 /* Cancelled requests might end up being completed instead of cancelled */
1531 notifier_list_notify(&req->cancel_notifiers, req);
1532 scsi_req_unref(req);
1533 }
1534
1535 /* Called by the devices when the request is canceled. */
scsi_req_cancel_complete(SCSIRequest * req)1536 void scsi_req_cancel_complete(SCSIRequest *req)
1537 {
1538 assert(req->io_canceled);
1539 if (req->bus->info->cancel) {
1540 req->bus->info->cancel(req);
1541 }
1542 notifier_list_notify(&req->cancel_notifiers, req);
1543 scsi_req_unref(req);
1544 }
1545
1546 /* Cancel @req asynchronously. @notifier is added to @req's cancellation
1547 * notifier list, the bus will be notified the requests cancellation is
1548 * completed.
1549 * */
scsi_req_cancel_async(SCSIRequest * req,Notifier * notifier)1550 void scsi_req_cancel_async(SCSIRequest *req, Notifier *notifier)
1551 {
1552 trace_scsi_req_cancel(req->dev->id, req->lun, req->tag);
1553 if (notifier) {
1554 notifier_list_add(&req->cancel_notifiers, notifier);
1555 }
1556 if (req->io_canceled) {
1557 /* A blk_aio_cancel_async is pending; when it finishes,
1558 * scsi_req_cancel_complete will be called and will
1559 * call the notifier we just added. Just wait for that.
1560 */
1561 assert(req->aiocb);
1562 return;
1563 }
1564 /* Dropped in scsi_req_cancel_complete. */
1565 scsi_req_ref(req);
1566 scsi_req_dequeue(req);
1567 req->io_canceled = true;
1568 if (req->aiocb) {
1569 blk_aio_cancel_async(req->aiocb);
1570 } else {
1571 scsi_req_cancel_complete(req);
1572 }
1573 }
1574
scsi_req_cancel(SCSIRequest * req)1575 void scsi_req_cancel(SCSIRequest *req)
1576 {
1577 trace_scsi_req_cancel(req->dev->id, req->lun, req->tag);
1578 if (!req->enqueued) {
1579 return;
1580 }
1581 assert(!req->io_canceled);
1582 /* Dropped in scsi_req_cancel_complete. */
1583 scsi_req_ref(req);
1584 scsi_req_dequeue(req);
1585 req->io_canceled = true;
1586 if (req->aiocb) {
1587 blk_aio_cancel(req->aiocb);
1588 } else {
1589 scsi_req_cancel_complete(req);
1590 }
1591 }
1592
scsi_ua_precedence(SCSISense sense)1593 static int scsi_ua_precedence(SCSISense sense)
1594 {
1595 if (sense.key != UNIT_ATTENTION) {
1596 return INT_MAX;
1597 }
1598 if (sense.asc == 0x29 && sense.ascq == 0x04) {
1599 /* DEVICE INTERNAL RESET goes with POWER ON OCCURRED */
1600 return 1;
1601 } else if (sense.asc == 0x3F && sense.ascq == 0x01) {
1602 /* MICROCODE HAS BEEN CHANGED goes with SCSI BUS RESET OCCURRED */
1603 return 2;
1604 } else if (sense.asc == 0x29 && (sense.ascq == 0x05 || sense.ascq == 0x06)) {
1605 /* These two go with "all others". */
1606 ;
1607 } else if (sense.asc == 0x29 && sense.ascq <= 0x07) {
1608 /* POWER ON, RESET OR BUS DEVICE RESET OCCURRED = 0
1609 * POWER ON OCCURRED = 1
1610 * SCSI BUS RESET OCCURRED = 2
1611 * BUS DEVICE RESET FUNCTION OCCURRED = 3
1612 * I_T NEXUS LOSS OCCURRED = 7
1613 */
1614 return sense.ascq;
1615 } else if (sense.asc == 0x2F && sense.ascq == 0x01) {
1616 /* COMMANDS CLEARED BY POWER LOSS NOTIFICATION */
1617 return 8;
1618 }
1619 return (sense.asc << 8) | sense.ascq;
1620 }
1621
scsi_bus_set_ua(SCSIBus * bus,SCSISense sense)1622 void scsi_bus_set_ua(SCSIBus *bus, SCSISense sense)
1623 {
1624 int prec1, prec2;
1625 if (sense.key != UNIT_ATTENTION) {
1626 return;
1627 }
1628
1629 /*
1630 * Override a pre-existing unit attention condition, except for a more
1631 * important reset condition.
1632 */
1633 prec1 = scsi_ua_precedence(bus->unit_attention);
1634 prec2 = scsi_ua_precedence(sense);
1635 if (prec2 < prec1) {
1636 bus->unit_attention = sense;
1637 }
1638 }
1639
scsi_device_set_ua(SCSIDevice * sdev,SCSISense sense)1640 void scsi_device_set_ua(SCSIDevice *sdev, SCSISense sense)
1641 {
1642 int prec1, prec2;
1643 if (sense.key != UNIT_ATTENTION) {
1644 return;
1645 }
1646 trace_scsi_device_set_ua(sdev->id, sdev->lun, sense.key,
1647 sense.asc, sense.ascq);
1648
1649 /*
1650 * Override a pre-existing unit attention condition, except for a more
1651 * important reset condition.
1652 */
1653 prec1 = scsi_ua_precedence(sdev->unit_attention);
1654 prec2 = scsi_ua_precedence(sense);
1655 if (prec2 < prec1) {
1656 sdev->unit_attention = sense;
1657 }
1658 }
1659
scsi_device_purge_requests(SCSIDevice * sdev,SCSISense sense)1660 void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense)
1661 {
1662 SCSIRequest *req;
1663
1664 aio_context_acquire(blk_get_aio_context(sdev->conf.blk));
1665 while (!QTAILQ_EMPTY(&sdev->requests)) {
1666 req = QTAILQ_FIRST(&sdev->requests);
1667 scsi_req_cancel_async(req, NULL);
1668 }
1669 blk_drain(sdev->conf.blk);
1670 aio_context_release(blk_get_aio_context(sdev->conf.blk));
1671 scsi_device_set_ua(sdev, sense);
1672 }
1673
scsi_device_drained_begin(SCSIDevice * sdev)1674 void scsi_device_drained_begin(SCSIDevice *sdev)
1675 {
1676 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, sdev->qdev.parent_bus);
1677 if (!bus) {
1678 return;
1679 }
1680
1681 assert(qemu_get_current_aio_context() == qemu_get_aio_context());
1682 assert(bus->drain_count < INT_MAX);
1683
1684 /*
1685 * Multiple BlockBackends can be on a SCSIBus and each may begin/end
1686 * draining at any time. Keep a counter so HBAs only see begin/end once.
1687 */
1688 if (bus->drain_count++ == 0) {
1689 trace_scsi_bus_drained_begin(bus, sdev);
1690 if (bus->info->drained_begin) {
1691 bus->info->drained_begin(bus);
1692 }
1693 }
1694 }
1695
scsi_device_drained_end(SCSIDevice * sdev)1696 void scsi_device_drained_end(SCSIDevice *sdev)
1697 {
1698 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, sdev->qdev.parent_bus);
1699 if (!bus) {
1700 return;
1701 }
1702
1703 assert(qemu_get_current_aio_context() == qemu_get_aio_context());
1704 assert(bus->drain_count > 0);
1705
1706 if (bus->drain_count-- == 1) {
1707 trace_scsi_bus_drained_end(bus, sdev);
1708 if (bus->info->drained_end) {
1709 bus->info->drained_end(bus);
1710 }
1711 }
1712 }
1713
scsibus_get_dev_path(DeviceState * dev)1714 static char *scsibus_get_dev_path(DeviceState *dev)
1715 {
1716 SCSIDevice *d = SCSI_DEVICE(dev);
1717 DeviceState *hba = dev->parent_bus->parent;
1718 char *id;
1719 char *path;
1720
1721 id = qdev_get_dev_path(hba);
1722 if (id) {
1723 path = g_strdup_printf("%s/%d:%d:%d", id, d->channel, d->id, d->lun);
1724 } else {
1725 path = g_strdup_printf("%d:%d:%d", d->channel, d->id, d->lun);
1726 }
1727 g_free(id);
1728 return path;
1729 }
1730
scsibus_get_fw_dev_path(DeviceState * dev)1731 static char *scsibus_get_fw_dev_path(DeviceState *dev)
1732 {
1733 SCSIDevice *d = SCSI_DEVICE(dev);
1734 return g_strdup_printf("channel@%x/%s@%x,%x", d->channel,
1735 qdev_fw_name(dev), d->id, d->lun);
1736 }
1737
1738 /* SCSI request list. For simplicity, pv points to the whole device */
1739
put_scsi_requests(QEMUFile * f,void * pv,size_t size,const VMStateField * field,JSONWriter * vmdesc)1740 static int put_scsi_requests(QEMUFile *f, void *pv, size_t size,
1741 const VMStateField *field, JSONWriter *vmdesc)
1742 {
1743 SCSIDevice *s = pv;
1744 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, s->qdev.parent_bus);
1745 SCSIRequest *req;
1746
1747 QTAILQ_FOREACH(req, &s->requests, next) {
1748 assert(!req->io_canceled);
1749 assert(req->status == -1 && req->host_status == -1);
1750 assert(req->enqueued);
1751
1752 qemu_put_sbyte(f, req->retry ? 1 : 2);
1753 qemu_put_buffer(f, req->cmd.buf, sizeof(req->cmd.buf));
1754 qemu_put_be32s(f, &req->tag);
1755 qemu_put_be32s(f, &req->lun);
1756 if (bus->info->save_request) {
1757 bus->info->save_request(f, req);
1758 }
1759 if (req->ops->save_request) {
1760 req->ops->save_request(f, req);
1761 }
1762 }
1763 qemu_put_sbyte(f, 0);
1764
1765 return 0;
1766 }
1767
get_scsi_requests(QEMUFile * f,void * pv,size_t size,const VMStateField * field)1768 static int get_scsi_requests(QEMUFile *f, void *pv, size_t size,
1769 const VMStateField *field)
1770 {
1771 SCSIDevice *s = pv;
1772 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, s->qdev.parent_bus);
1773 int8_t sbyte;
1774
1775 while ((sbyte = qemu_get_sbyte(f)) > 0) {
1776 uint8_t buf[SCSI_CMD_BUF_SIZE];
1777 uint32_t tag;
1778 uint32_t lun;
1779 SCSIRequest *req;
1780
1781 qemu_get_buffer(f, buf, sizeof(buf));
1782 qemu_get_be32s(f, &tag);
1783 qemu_get_be32s(f, &lun);
1784 /*
1785 * A too-short CDB would have been rejected by scsi_req_new, so just use
1786 * SCSI_CMD_BUF_SIZE as the CDB length.
1787 */
1788 req = scsi_req_new(s, tag, lun, buf, sizeof(buf), NULL);
1789 req->retry = (sbyte == 1);
1790 if (bus->info->load_request) {
1791 req->hba_private = bus->info->load_request(f, req);
1792 }
1793 if (req->ops->load_request) {
1794 req->ops->load_request(f, req);
1795 }
1796
1797 /* Just restart it later. */
1798 scsi_req_enqueue_internal(req);
1799
1800 /* At this point, the request will be kept alive by the reference
1801 * added by scsi_req_enqueue_internal, so we can release our reference.
1802 * The HBA of course will add its own reference in the load_request
1803 * callback if it needs to hold on the SCSIRequest.
1804 */
1805 scsi_req_unref(req);
1806 }
1807
1808 return 0;
1809 }
1810
1811 static const VMStateInfo vmstate_info_scsi_requests = {
1812 .name = "scsi-requests",
1813 .get = get_scsi_requests,
1814 .put = put_scsi_requests,
1815 };
1816
scsi_sense_state_needed(void * opaque)1817 static bool scsi_sense_state_needed(void *opaque)
1818 {
1819 SCSIDevice *s = opaque;
1820
1821 return s->sense_len > SCSI_SENSE_BUF_SIZE_OLD;
1822 }
1823
1824 static const VMStateDescription vmstate_scsi_sense_state = {
1825 .name = "SCSIDevice/sense",
1826 .version_id = 1,
1827 .minimum_version_id = 1,
1828 .needed = scsi_sense_state_needed,
1829 .fields = (VMStateField[]) {
1830 VMSTATE_UINT8_SUB_ARRAY(sense, SCSIDevice,
1831 SCSI_SENSE_BUF_SIZE_OLD,
1832 SCSI_SENSE_BUF_SIZE - SCSI_SENSE_BUF_SIZE_OLD),
1833 VMSTATE_END_OF_LIST()
1834 }
1835 };
1836
1837 const VMStateDescription vmstate_scsi_device = {
1838 .name = "SCSIDevice",
1839 .version_id = 1,
1840 .minimum_version_id = 1,
1841 .fields = (VMStateField[]) {
1842 VMSTATE_UINT8(unit_attention.key, SCSIDevice),
1843 VMSTATE_UINT8(unit_attention.asc, SCSIDevice),
1844 VMSTATE_UINT8(unit_attention.ascq, SCSIDevice),
1845 VMSTATE_BOOL(sense_is_ua, SCSIDevice),
1846 VMSTATE_UINT8_SUB_ARRAY(sense, SCSIDevice, 0, SCSI_SENSE_BUF_SIZE_OLD),
1847 VMSTATE_UINT32(sense_len, SCSIDevice),
1848 {
1849 .name = "requests",
1850 .version_id = 0,
1851 .field_exists = NULL,
1852 .size = 0, /* ouch */
1853 .info = &vmstate_info_scsi_requests,
1854 .flags = VMS_SINGLE,
1855 .offset = 0,
1856 },
1857 VMSTATE_END_OF_LIST()
1858 },
1859 .subsections = (const VMStateDescription*[]) {
1860 &vmstate_scsi_sense_state,
1861 NULL
1862 }
1863 };
1864
1865 static Property scsi_props[] = {
1866 DEFINE_PROP_UINT32("channel", SCSIDevice, channel, 0),
1867 DEFINE_PROP_UINT32("scsi-id", SCSIDevice, id, -1),
1868 DEFINE_PROP_UINT32("lun", SCSIDevice, lun, -1),
1869 DEFINE_PROP_END_OF_LIST(),
1870 };
1871
scsi_device_class_init(ObjectClass * klass,void * data)1872 static void scsi_device_class_init(ObjectClass *klass, void *data)
1873 {
1874 DeviceClass *k = DEVICE_CLASS(klass);
1875 set_bit(DEVICE_CATEGORY_STORAGE, k->categories);
1876 k->bus_type = TYPE_SCSI_BUS;
1877 k->realize = scsi_qdev_realize;
1878 k->unrealize = scsi_qdev_unrealize;
1879 device_class_set_props(k, scsi_props);
1880 }
1881
scsi_dev_instance_init(Object * obj)1882 static void scsi_dev_instance_init(Object *obj)
1883 {
1884 DeviceState *dev = DEVICE(obj);
1885 SCSIDevice *s = SCSI_DEVICE(dev);
1886
1887 device_add_bootindex_property(obj, &s->conf.bootindex,
1888 "bootindex", NULL,
1889 &s->qdev);
1890 }
1891
1892 static const TypeInfo scsi_device_type_info = {
1893 .name = TYPE_SCSI_DEVICE,
1894 .parent = TYPE_DEVICE,
1895 .instance_size = sizeof(SCSIDevice),
1896 .abstract = true,
1897 .class_size = sizeof(SCSIDeviceClass),
1898 .class_init = scsi_device_class_init,
1899 .instance_init = scsi_dev_instance_init,
1900 };
1901
scsi_bus_class_init(ObjectClass * klass,void * data)1902 static void scsi_bus_class_init(ObjectClass *klass, void *data)
1903 {
1904 BusClass *k = BUS_CLASS(klass);
1905 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
1906
1907 k->get_dev_path = scsibus_get_dev_path;
1908 k->get_fw_dev_path = scsibus_get_fw_dev_path;
1909 k->check_address = scsi_bus_check_address;
1910 hc->unplug = qdev_simple_device_unplug_cb;
1911 }
1912
1913 static const TypeInfo scsi_bus_info = {
1914 .name = TYPE_SCSI_BUS,
1915 .parent = TYPE_BUS,
1916 .instance_size = sizeof(SCSIBus),
1917 .class_init = scsi_bus_class_init,
1918 .interfaces = (InterfaceInfo[]) {
1919 { TYPE_HOTPLUG_HANDLER },
1920 { }
1921 }
1922 };
1923
scsi_register_types(void)1924 static void scsi_register_types(void)
1925 {
1926 type_register_static(&scsi_bus_info);
1927 type_register_static(&scsi_device_type_info);
1928 }
1929
1930 type_init(scsi_register_types)
1931