Bug Summary

File:hw/usb/dev-storage.c
Location:line 308, column 5
Description:Value stored to 'ret' is never read

Annotated Source Code

1/*
2 * USB Mass Storage Device emulation
3 *
4 * Copyright (c) 2006 CodeSourcery.
5 * Written by Paul Brook
6 *
7 * This code is licensed under the LGPL.
8 */
9
10#include "qemu-common.h"
11#include "qemu-option.h"
12#include "qemu-config.h"
13#include "hw/usb.h"
14#include "hw/usb/desc.h"
15#include "hw/scsi.h"
16#include "console.h"
17#include "monitor.h"
18#include "sysemu.h"
19#include "blockdev.h"
20
21//#define DEBUG_MSD
22
23#ifdef DEBUG_MSD
24#define DPRINTF(fmt, ...)do {} while(0) \
25do { printf("usb-msd: " fmt , ## __VA_ARGS__); } while (0)
26#else
27#define DPRINTF(fmt, ...)do {} while(0) do {} while(0)
28#endif
29
30/* USB requests. */
31#define MassStorageReset0xff 0xff
32#define GetMaxLun0xfe 0xfe
33
34enum USBMSDMode {
35 USB_MSDM_CBW, /* Command Block. */
36 USB_MSDM_DATAOUT, /* Transfer data to device. */
37 USB_MSDM_DATAIN, /* Transfer data from device. */
38 USB_MSDM_CSW /* Command Status. */
39};
40
41struct usb_msd_csw {
42 uint32_t sig;
43 uint32_t tag;
44 uint32_t residue;
45 uint8_t status;
46};
47
48typedef struct {
49 USBDevice dev;
50 enum USBMSDMode mode;
51 uint32_t scsi_off;
52 uint32_t scsi_len;
53 uint32_t data_len;
54 struct usb_msd_csw csw;
55 SCSIRequest *req;
56 SCSIBus bus;
57 BlockConf conf;
58 char *serial;
59 SCSIDevice *scsi_dev;
60 uint32_t removable;
61 /* For async completion. */
62 USBPacket *packet;
63} MSDState;
64
65struct usb_msd_cbw {
66 uint32_t sig;
67 uint32_t tag;
68 uint32_t data_len;
69 uint8_t flags;
70 uint8_t lun;
71 uint8_t cmd_len;
72 uint8_t cmd[16];
73};
74
75enum {
76 STR_MANUFACTURER = 1,
77 STR_PRODUCT,
78 STR_SERIALNUMBER,
79 STR_CONFIG_FULL,
80 STR_CONFIG_HIGH,
81};
82
83static const USBDescStrings desc_strings = {
84 [STR_MANUFACTURER] = "QEMU",
85 [STR_PRODUCT] = "QEMU USB HARDDRIVE",
86 [STR_SERIALNUMBER] = "1",
87 [STR_CONFIG_FULL] = "Full speed config (usb 1.1)",
88 [STR_CONFIG_HIGH] = "High speed config (usb 2.0)",
89};
90
91static const USBDescIface desc_iface_full = {
92 .bInterfaceNumber = 0,
93 .bNumEndpoints = 2,
94 .bInterfaceClass = USB_CLASS_MASS_STORAGE8,
95 .bInterfaceSubClass = 0x06, /* SCSI */
96 .bInterfaceProtocol = 0x50, /* Bulk */
97 .eps = (USBDescEndpoint[]) {
98 {
99 .bEndpointAddress = USB_DIR_IN0x80 | 0x01,
100 .bmAttributes = USB_ENDPOINT_XFER_BULK2,
101 .wMaxPacketSize = 64,
102 },{
103 .bEndpointAddress = USB_DIR_OUT0 | 0x02,
104 .bmAttributes = USB_ENDPOINT_XFER_BULK2,
105 .wMaxPacketSize = 64,
106 },
107 }
108};
109
110static const USBDescDevice desc_device_full = {
111 .bcdUSB = 0x0200,
112 .bMaxPacketSize0 = 8,
113 .bNumConfigurations = 1,
114 .confs = (USBDescConfig[]) {
115 {
116 .bNumInterfaces = 1,
117 .bConfigurationValue = 1,
118 .iConfiguration = STR_CONFIG_FULL,
119 .bmAttributes = 0xc0,
120 .nif = 1,
121 .ifs = &desc_iface_full,
122 },
123 },
124};
125
126static const USBDescIface desc_iface_high = {
127 .bInterfaceNumber = 0,
128 .bNumEndpoints = 2,
129 .bInterfaceClass = USB_CLASS_MASS_STORAGE8,
130 .bInterfaceSubClass = 0x06, /* SCSI */
131 .bInterfaceProtocol = 0x50, /* Bulk */
132 .eps = (USBDescEndpoint[]) {
133 {
134 .bEndpointAddress = USB_DIR_IN0x80 | 0x01,
135 .bmAttributes = USB_ENDPOINT_XFER_BULK2,
136 .wMaxPacketSize = 512,
137 },{
138 .bEndpointAddress = USB_DIR_OUT0 | 0x02,
139 .bmAttributes = USB_ENDPOINT_XFER_BULK2,
140 .wMaxPacketSize = 512,
141 },
142 }
143};
144
145static const USBDescDevice desc_device_high = {
146 .bcdUSB = 0x0200,
147 .bMaxPacketSize0 = 64,
148 .bNumConfigurations = 1,
149 .confs = (USBDescConfig[]) {
150 {
151 .bNumInterfaces = 1,
152 .bConfigurationValue = 1,
153 .iConfiguration = STR_CONFIG_HIGH,
154 .bmAttributes = 0xc0,
155 .nif = 1,
156 .ifs = &desc_iface_high,
157 },
158 },
159};
160
161static const USBDesc desc = {
162 .id = {
163 .idVendor = 0x46f4, /* CRC16() of "QEMU" */
164 .idProduct = 0x0001,
165 .bcdDevice = 0,
166 .iManufacturer = STR_MANUFACTURER,
167 .iProduct = STR_PRODUCT,
168 .iSerialNumber = STR_SERIALNUMBER,
169 },
170 .full = &desc_device_full,
171 .high = &desc_device_high,
172 .str = desc_strings,
173};
174
175static void usb_msd_copy_data(MSDState *s, USBPacket *p)
176{
177 uint32_t len;
178 len = p->iov.size - p->result;
179 if (len > s->scsi_len)
180 len = s->scsi_len;
181 usb_packet_copy(p, scsi_req_get_buf(s->req) + s->scsi_off, len);
182 s->scsi_len -= len;
183 s->scsi_off += len;
184 s->data_len -= len;
185 if (s->scsi_len == 0 || s->data_len == 0) {
186 scsi_req_continue(s->req);
187 }
188}
189
190static void usb_msd_send_status(MSDState *s, USBPacket *p)
191{
192 int len;
193
194 DPRINTF("Command status %d tag 0x%x, len %zd\n",do {} while(0)
195 s->csw.status, le32_to_cpu(s->csw.tag), p->iov.size)do {} while(0);
196
197 assert(s->csw.sig == cpu_to_le32(0x53425355))((s->csw.sig == cpu_to_le32(0x53425355)) ? (void) (0) : __assert_fail
("s->csw.sig == cpu_to_le32(0x53425355)", "/home/stefan/src/qemu/qemu.org/qemu/hw/usb/dev-storage.c"
, 197, __PRETTY_FUNCTION__));
198 len = MIN(sizeof(s->csw), p->iov.size)(((sizeof(s->csw)) < (p->iov.size)) ? (sizeof(s->
csw)) : (p->iov.size));
199 usb_packet_copy(p, &s->csw, len);
200 memset(&s->csw, 0, sizeof(s->csw));
201}
202
203static void usb_msd_packet_complete(MSDState *s)
204{
205 USBPacket *p = s->packet;
206
207 /* Set s->packet to NULL before calling usb_packet_complete
208 because another request may be issued before
209 usb_packet_complete returns. */
210 DPRINTF("Packet complete %p\n", p)do {} while(0);
211 s->packet = NULL((void*)0);
212 usb_packet_complete(&s->dev, p);
213}
214
215static void usb_msd_transfer_data(SCSIRequest *req, uint32_t len)
216{
217 MSDState *s = DO_UPCAST(MSDState, dev.qdev, req->bus->qbus.parent)( __extension__ ( { char __attribute__((unused)) offset_must_be_zero
[ -__builtin_offsetof(MSDState, dev.qdev)]; ({ const typeof((
(MSDState *) 0)->dev.qdev) *__mptr = (req->bus->qbus
.parent); (MSDState *) ((char *) __mptr - __builtin_offsetof(
MSDState, dev.qdev));});}));
218 USBPacket *p = s->packet;
219
220 assert((s->mode == USB_MSDM_DATAOUT) == (req->cmd.mode == SCSI_XFER_TO_DEV))(((s->mode == USB_MSDM_DATAOUT) == (req->cmd.mode == SCSI_XFER_TO_DEV
)) ? (void) (0) : __assert_fail ("(s->mode == USB_MSDM_DATAOUT) == (req->cmd.mode == SCSI_XFER_TO_DEV)"
, "/home/stefan/src/qemu/qemu.org/qemu/hw/usb/dev-storage.c",
220, __PRETTY_FUNCTION__));
221 s->scsi_len = len;
222 s->scsi_off = 0;
223 if (p) {
224 usb_msd_copy_data(s, p);
225 p = s->packet;
226 if (p && p->result == p->iov.size) {
227 usb_msd_packet_complete(s);
228 }
229 }
230}
231
232static void usb_msd_command_complete(SCSIRequest *req, uint32_t status, size_t resid)
233{
234 MSDState *s = DO_UPCAST(MSDState, dev.qdev, req->bus->qbus.parent)( __extension__ ( { char __attribute__((unused)) offset_must_be_zero
[ -__builtin_offsetof(MSDState, dev.qdev)]; ({ const typeof((
(MSDState *) 0)->dev.qdev) *__mptr = (req->bus->qbus
.parent); (MSDState *) ((char *) __mptr - __builtin_offsetof(
MSDState, dev.qdev));});}));
235 USBPacket *p = s->packet;
236
237 DPRINTF("Command complete %d tag 0x%x\n", status, req->tag)do {} while(0);
238
239 s->csw.sig = cpu_to_le32(0x53425355);
240 s->csw.tag = cpu_to_le32(req->tag);
241 s->csw.residue = cpu_to_le32(s->data_len);
242 s->csw.status = status != 0;
243
244 if (s->packet) {
245 if (s->data_len == 0 && s->mode == USB_MSDM_DATAOUT) {
246 /* A deferred packet with no write data remaining must be
247 the status read packet. */
248 usb_msd_send_status(s, p);
249 s->mode = USB_MSDM_CBW;
250 } else {
251 if (s->data_len) {
252 int len = (p->iov.size - p->result);
253 usb_packet_skip(p, len);
254 s->data_len -= len;
255 }
256 if (s->data_len == 0) {
257 s->mode = USB_MSDM_CSW;
258 }
259 }
260 usb_msd_packet_complete(s);
261 } else if (s->data_len == 0) {
262 s->mode = USB_MSDM_CSW;
263 }
264 scsi_req_unref(req);
265 s->req = NULL((void*)0);
266}
267
268static void usb_msd_request_cancelled(SCSIRequest *req)
269{
270 MSDState *s = DO_UPCAST(MSDState, dev.qdev, req->bus->qbus.parent)( __extension__ ( { char __attribute__((unused)) offset_must_be_zero
[ -__builtin_offsetof(MSDState, dev.qdev)]; ({ const typeof((
(MSDState *) 0)->dev.qdev) *__mptr = (req->bus->qbus
.parent); (MSDState *) ((char *) __mptr - __builtin_offsetof(
MSDState, dev.qdev));});}));
271
272 if (req == s->req) {
273 scsi_req_unref(s->req);
274 s->req = NULL((void*)0);
275 s->scsi_len = 0;
276 }
277}
278
279static void usb_msd_handle_reset(USBDevice *dev)
280{
281 MSDState *s = (MSDState *)dev;
282
283 DPRINTF("Reset\n")do {} while(0);
284 if (s->req) {
285 scsi_req_cancel(s->req);
286 }
287 assert(s->req == NULL)((s->req == ((void*)0)) ? (void) (0) : __assert_fail ("s->req == ((void*)0)"
, "/home/stefan/src/qemu/qemu.org/qemu/hw/usb/dev-storage.c",
287, __PRETTY_FUNCTION__));
288
289 if (s->packet) {
290 s->packet->result = USB_RET_STALL(-3);
291 usb_msd_packet_complete(s);
292 }
293
294 s->mode = USB_MSDM_CBW;
295}
296
297static int usb_msd_handle_control(USBDevice *dev, USBPacket *p,
298 int request, int value, int index, int length, uint8_t *data)
299{
300 MSDState *s = (MSDState *)dev;
301 int ret;
302
303 ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
304 if (ret >= 0) {
305 return ret;
306 }
307
308 ret = 0;
Value stored to 'ret' is never read
309 switch (request) {
310 case EndpointOutRequest((0|(0x00 << 5)|0x02)<<8) | USB_REQ_CLEAR_FEATURE0x01:
311 ret = 0;
312 break;
313 /* Class specific requests. */
314 case ClassInterfaceOutRequest((0|(0x01 << 5)|0x01)<<8) | MassStorageReset0xff:
315 /* Reset state ready for the next CBW. */
316 s->mode = USB_MSDM_CBW;
317 ret = 0;
318 break;
319 case ClassInterfaceRequest((0x80|(0x01 << 5)|0x01)<<8) | GetMaxLun0xfe:
320 data[0] = 0;
321 ret = 1;
322 break;
323 default:
324 ret = USB_RET_STALL(-3);
325 break;
326 }
327 return ret;
328}
329
330static void usb_msd_cancel_io(USBDevice *dev, USBPacket *p)
331{
332 MSDState *s = DO_UPCAST(MSDState, dev, dev)( __extension__ ( { char __attribute__((unused)) offset_must_be_zero
[ -__builtin_offsetof(MSDState, dev)]; ({ const typeof(((MSDState
*) 0)->dev) *__mptr = (dev); (MSDState *) ((char *) __mptr
- __builtin_offsetof(MSDState, dev));});}));
333
334 assert(s->packet == p)((s->packet == p) ? (void) (0) : __assert_fail ("s->packet == p"
, "/home/stefan/src/qemu/qemu.org/qemu/hw/usb/dev-storage.c",
334, __PRETTY_FUNCTION__));
335 s->packet = NULL((void*)0);
336
337 if (s->req) {
338 scsi_req_cancel(s->req);
339 }
340}
341
342static int usb_msd_handle_data(USBDevice *dev, USBPacket *p)
343{
344 MSDState *s = (MSDState *)dev;
345 uint32_t tag;
346 int ret = 0;
347 struct usb_msd_cbw cbw;
348 uint8_t devep = p->ep->nr;
349
350 switch (p->pid) {
351 case USB_TOKEN_OUT0xe1:
352 if (devep != 2)
353 goto fail;
354
355 switch (s->mode) {
356 case USB_MSDM_CBW:
357 if (p->iov.size != 31) {
358 fprintf(stderrstderr, "usb-msd: Bad CBW size");
359 goto fail;
360 }
361 usb_packet_copy(p, &cbw, 31);
362 if (le32_to_cpu(cbw.sig) != 0x43425355) {
363 fprintf(stderrstderr, "usb-msd: Bad signature %08x\n",
364 le32_to_cpu(cbw.sig));
365 goto fail;
366 }
367 DPRINTF("Command on LUN %d\n", cbw.lun)do {} while(0);
368 if (cbw.lun != 0) {
369 fprintf(stderrstderr, "usb-msd: Bad LUN %d\n", cbw.lun);
370 goto fail;
371 }
372 tag = le32_to_cpu(cbw.tag);
373 s->data_len = le32_to_cpu(cbw.data_len);
374 if (s->data_len == 0) {
375 s->mode = USB_MSDM_CSW;
376 } else if (cbw.flags & 0x80) {
377 s->mode = USB_MSDM_DATAIN;
378 } else {
379 s->mode = USB_MSDM_DATAOUT;
380 }
381 DPRINTF("Command tag 0x%x flags %08x len %d data %d\n",do {} while(0)
382 tag, cbw.flags, cbw.cmd_len, s->data_len)do {} while(0);
383 assert(le32_to_cpu(s->csw.residue) == 0)((le32_to_cpu(s->csw.residue) == 0) ? (void) (0) : __assert_fail
("le32_to_cpu(s->csw.residue) == 0", "/home/stefan/src/qemu/qemu.org/qemu/hw/usb/dev-storage.c"
, 383, __PRETTY_FUNCTION__));
384 s->scsi_len = 0;
385 s->req = scsi_req_new(s->scsi_dev, tag, 0, cbw.cmd, NULL((void*)0));
386 scsi_req_enqueue(s->req);
387 if (s->req && s->req->cmd.xfer != SCSI_XFER_NONE) {
388 scsi_req_continue(s->req);
389 }
390 ret = p->result;
391 break;
392
393 case USB_MSDM_DATAOUT:
394 DPRINTF("Data out %zd/%d\n", p->iov.size, s->data_len)do {} while(0);
395 if (p->iov.size > s->data_len) {
396 goto fail;
397 }
398
399 if (s->scsi_len) {
400 usb_msd_copy_data(s, p);
401 }
402 if (le32_to_cpu(s->csw.residue)) {
403 int len = p->iov.size - p->result;
404 if (len) {
405 usb_packet_skip(p, len);
406 s->data_len -= len;
407 if (s->data_len == 0) {
408 s->mode = USB_MSDM_CSW;
409 }
410 }
411 }
412 if (p->result < p->iov.size) {
413 DPRINTF("Deferring packet %p\n", p)do {} while(0);
414 s->packet = p;
415 ret = USB_RET_ASYNC(-6);
416 } else {
417 ret = p->result;
418 }
419 break;
420
421 default:
422 DPRINTF("Unexpected write (len %zd)\n", p->iov.size)do {} while(0);
423 goto fail;
424 }
425 break;
426
427 case USB_TOKEN_IN0x69:
428 if (devep != 1)
429 goto fail;
430
431 switch (s->mode) {
432 case USB_MSDM_DATAOUT:
433 if (s->data_len != 0 || p->iov.size < 13) {
434 goto fail;
435 }
436 /* Waiting for SCSI write to complete. */
437 s->packet = p;
438 ret = USB_RET_ASYNC(-6);
439 break;
440
441 case USB_MSDM_CSW:
442 if (p->iov.size < 13) {
443 goto fail;
444 }
445
446 if (s->req) {
447 /* still in flight */
448 s->packet = p;
449 ret = USB_RET_ASYNC(-6);
450 } else {
451 usb_msd_send_status(s, p);
452 s->mode = USB_MSDM_CBW;
453 ret = 13;
454 }
455 break;
456
457 case USB_MSDM_DATAIN:
458 DPRINTF("Data in %zd/%d, scsi_len %d\n",do {} while(0)
459 p->iov.size, s->data_len, s->scsi_len)do {} while(0);
460 if (s->scsi_len) {
461 usb_msd_copy_data(s, p);
462 }
463 if (le32_to_cpu(s->csw.residue)) {
464 int len = p->iov.size - p->result;
465 if (len) {
466 usb_packet_skip(p, len);
467 s->data_len -= len;
468 if (s->data_len == 0) {
469 s->mode = USB_MSDM_CSW;
470 }
471 }
472 }
473 if (p->result < p->iov.size) {
474 DPRINTF("Deferring packet %p\n", p)do {} while(0);
475 s->packet = p;
476 ret = USB_RET_ASYNC(-6);
477 } else {
478 ret = p->result;
479 }
480 break;
481
482 default:
483 DPRINTF("Unexpected read (len %zd)\n", p->iov.size)do {} while(0);
484 goto fail;
485 }
486 break;
487
488 default:
489 DPRINTF("Bad token\n")do {} while(0);
490 fail:
491 ret = USB_RET_STALL(-3);
492 break;
493 }
494
495 return ret;
496}
497
498static void usb_msd_password_cb(void *opaque, int err)
499{
500 MSDState *s = opaque;
501
502 if (!err)
503 err = usb_device_attach(&s->dev);
504
505 if (err)
506 qdev_unplug(&s->dev.qdev, NULL((void*)0));
507}
508
509static void *usb_msd_load_request(QEMUFile *f, SCSIRequest *req)
510{
511 MSDState *s = DO_UPCAST(MSDState, dev.qdev, req->bus->qbus.parent)( __extension__ ( { char __attribute__((unused)) offset_must_be_zero
[ -__builtin_offsetof(MSDState, dev.qdev)]; ({ const typeof((
(MSDState *) 0)->dev.qdev) *__mptr = (req->bus->qbus
.parent); (MSDState *) ((char *) __mptr - __builtin_offsetof(
MSDState, dev.qdev));});}));
512
513 /* nothing to load, just store req in our state struct */
514 assert(s->req == NULL)((s->req == ((void*)0)) ? (void) (0) : __assert_fail ("s->req == ((void*)0)"
, "/home/stefan/src/qemu/qemu.org/qemu/hw/usb/dev-storage.c",
514, __PRETTY_FUNCTION__));
515 scsi_req_ref(req);
516 s->req = req;
517 return NULL((void*)0);
518}
519
520static const struct SCSIBusInfo usb_msd_scsi_info = {
521 .tcq = false0,
522 .max_target = 0,
523 .max_lun = 0,
524
525 .transfer_data = usb_msd_transfer_data,
526 .complete = usb_msd_command_complete,
527 .cancel = usb_msd_request_cancelled,
528 .load_request = usb_msd_load_request,
529};
530
531static int usb_msd_initfn(USBDevice *dev)
532{
533 MSDState *s = DO_UPCAST(MSDState, dev, dev)( __extension__ ( { char __attribute__((unused)) offset_must_be_zero
[ -__builtin_offsetof(MSDState, dev)]; ({ const typeof(((MSDState
*) 0)->dev) *__mptr = (dev); (MSDState *) ((char *) __mptr
- __builtin_offsetof(MSDState, dev));});}));
534 BlockDriverState *bs = s->conf.bs;
535 DriveInfo *dinfo;
536
537 if (!bs) {
538 error_report("drive property not set");
539 return -1;
540 }
541
542 /*
543 * Hack alert: this pretends to be a block device, but it's really
544 * a SCSI bus that can serve only a single device, which it
545 * creates automatically. But first it needs to detach from its
546 * blockdev, or else scsi_bus_legacy_add_drive() dies when it
547 * attaches again.
548 *
549 * The hack is probably a bad idea.
550 */
551 bdrv_detach_dev(bs, &s->dev.qdev);
552 s->conf.bs = NULL((void*)0);
553
554 if (!s->serial) {
555 /* try to fall back to value set with legacy -drive serial=... */
556 dinfo = drive_get_by_blockdev(bs);
557 if (*dinfo->serial) {
558 s->serial = strdup(dinfo->serial);
559 }
560 }
561 if (s->serial) {
562 usb_desc_set_string(dev, STR_SERIALNUMBER, s->serial);
563 } else {
564 usb_desc_create_serial(dev);
565 }
566
567 usb_desc_init(dev);
568 scsi_bus_new(&s->bus, &s->dev.qdev, &usb_msd_scsi_info);
569 s->scsi_dev = scsi_bus_legacy_add_drive(&s->bus, bs, 0, !!s->removable,
570 s->conf.bootindex);
571 if (!s->scsi_dev) {
572 return -1;
573 }
574 s->bus.qbus.allow_hotplug = 0;
575 usb_msd_handle_reset(dev);
576
577 if (bdrv_key_required(bs)) {
578 if (cur_mon) {
579 monitor_read_bdrv_key_start(cur_mon, bs, usb_msd_password_cb, s);
580 s->dev.auto_attach = 0;
581 } else {
582 autostart = 0;
583 }
584 }
585
586 return 0;
587}
588
589static USBDevice *usb_msd_init(USBBus *bus, const char *filename)
590{
591 static int nr=0;
592 char id[8];
593 QemuOpts *opts;
594 DriveInfo *dinfo;
595 USBDevice *dev;
596 const char *p1;
597 char fmt[32];
598
599 /* parse -usbdevice disk: syntax into drive opts */
600 snprintf(id, sizeof(id), "usb%d", nr++);
601 opts = qemu_opts_create(qemu_find_opts("drive"), id, 0, NULL((void*)0));
602
603 p1 = strchr(filename, ':');
604 if (p1++) {
605 const char *p2;
606
607 if (strstart(filename, "format=", &p2)) {
608 int len = MIN(p1 - p2, sizeof(fmt))(((p1 - p2) < (sizeof(fmt))) ? (p1 - p2) : (sizeof(fmt)));
609 pstrcpy(fmt, len, p2);
610 qemu_opt_set(opts, "format", fmt);
611 } else if (*filename != ':') {
612 printf("unrecognized USB mass-storage option %s\n", filename);
613 return NULL((void*)0);
614 }
615 filename = p1;
616 }
617 if (!*filename) {
618 printf("block device specification needed\n");
619 return NULL((void*)0);
620 }
621 qemu_opt_set(opts, "file", filename);
622 qemu_opt_set(opts, "if", "none");
623
624 /* create host drive */
625 dinfo = drive_init(opts, 0);
626 if (!dinfo) {
627 qemu_opts_del(opts);
628 return NULL((void*)0);
629 }
630
631 /* create guest device */
632 dev = usb_create(bus, "usb-storage");
633 if (!dev) {
634 return NULL((void*)0);
635 }
636 if (qdev_prop_set_drive(&dev->qdev, "drive", dinfo->bdrv) < 0) {
637 qdev_free(&dev->qdev);
638 return NULL((void*)0);
639 }
640 if (qdev_init(&dev->qdev) < 0)
641 return NULL((void*)0);
642
643 return dev;
644}
645
646static const VMStateDescription vmstate_usb_msd = {
647 .name = "usb-storage",
648 .version_id = 1,
649 .minimum_version_id = 1,
650 .fields = (VMStateField []) {
651 VMSTATE_USB_DEVICE(dev, MSDState){ .name = ("dev"), .size = sizeof(USBDevice), .vmsd = &vmstate_usb_device
, .flags = VMS_STRUCT, .offset = (__builtin_offsetof(MSDState
, dev) + ((USBDevice*)0 - (typeof(((MSDState *)0)->dev)*)0
)), },
652 VMSTATE_UINT32(mode, MSDState){ .name = ("mode"), .version_id = (0), .field_exists = (((void
*)0)), .size = sizeof(uint32_t), .info = &(vmstate_info_uint32
), .flags = VMS_SINGLE, .offset = (__builtin_offsetof(MSDState
, mode) + ((uint32_t*)0 - (typeof(((MSDState *)0)->mode)*)
0)), },
653 VMSTATE_UINT32(scsi_len, MSDState){ .name = ("scsi_len"), .version_id = (0), .field_exists = ((
(void*)0)), .size = sizeof(uint32_t), .info = &(vmstate_info_uint32
), .flags = VMS_SINGLE, .offset = (__builtin_offsetof(MSDState
, scsi_len) + ((uint32_t*)0 - (typeof(((MSDState *)0)->scsi_len
)*)0)), },
654 VMSTATE_UINT32(scsi_off, MSDState){ .name = ("scsi_off"), .version_id = (0), .field_exists = ((
(void*)0)), .size = sizeof(uint32_t), .info = &(vmstate_info_uint32
), .flags = VMS_SINGLE, .offset = (__builtin_offsetof(MSDState
, scsi_off) + ((uint32_t*)0 - (typeof(((MSDState *)0)->scsi_off
)*)0)), },
655 VMSTATE_UINT32(data_len, MSDState){ .name = ("data_len"), .version_id = (0), .field_exists = ((
(void*)0)), .size = sizeof(uint32_t), .info = &(vmstate_info_uint32
), .flags = VMS_SINGLE, .offset = (__builtin_offsetof(MSDState
, data_len) + ((uint32_t*)0 - (typeof(((MSDState *)0)->data_len
)*)0)), },
656 VMSTATE_UINT32(csw.sig, MSDState){ .name = ("csw.sig"), .version_id = (0), .field_exists = (((
void*)0)), .size = sizeof(uint32_t), .info = &(vmstate_info_uint32
), .flags = VMS_SINGLE, .offset = (__builtin_offsetof(MSDState
, csw.sig) + ((uint32_t*)0 - (typeof(((MSDState *)0)->csw.
sig)*)0)), },
657 VMSTATE_UINT32(csw.tag, MSDState){ .name = ("csw.tag"), .version_id = (0), .field_exists = (((
void*)0)), .size = sizeof(uint32_t), .info = &(vmstate_info_uint32
), .flags = VMS_SINGLE, .offset = (__builtin_offsetof(MSDState
, csw.tag) + ((uint32_t*)0 - (typeof(((MSDState *)0)->csw.
tag)*)0)), },
658 VMSTATE_UINT32(csw.residue, MSDState){ .name = ("csw.residue"), .version_id = (0), .field_exists =
(((void*)0)), .size = sizeof(uint32_t), .info = &(vmstate_info_uint32
), .flags = VMS_SINGLE, .offset = (__builtin_offsetof(MSDState
, csw.residue) + ((uint32_t*)0 - (typeof(((MSDState *)0)->
csw.residue)*)0)), },
659 VMSTATE_UINT8(csw.status, MSDState){ .name = ("csw.status"), .version_id = (0), .field_exists = (
((void*)0)), .size = sizeof(uint8_t), .info = &(vmstate_info_uint8
), .flags = VMS_SINGLE, .offset = (__builtin_offsetof(MSDState
, csw.status) + ((uint8_t*)0 - (typeof(((MSDState *)0)->csw
.status)*)0)), },
660 VMSTATE_END_OF_LIST(){}
661 }
662};
663
664static Property msd_properties[] = {
665 DEFINE_BLOCK_PROPERTIES(MSDState, conf){ .name = ("drive"), .info = &(qdev_prop_drive), .offset =
__builtin_offsetof(MSDState, conf.bs) + ((BlockDriverState *
*)0 - (typeof(((MSDState *)0)->conf.bs)*)0), }, { .name = (
"logical_block_size"), .info = &(qdev_prop_blocksize), .offset
= __builtin_offsetof(MSDState, conf.logical_block_size) + ((
uint16_t*)0 - (typeof(((MSDState *)0)->conf.logical_block_size
)*)0), .qtype = QTYPE_QINT, .defval = (uint16_t)512, }, { .name
= ("physical_block_size"), .info = &(qdev_prop_blocksize
), .offset = __builtin_offsetof(MSDState, conf.physical_block_size
) + ((uint16_t*)0 - (typeof(((MSDState *)0)->conf.physical_block_size
)*)0), .qtype = QTYPE_QINT, .defval = (uint16_t)512, }, { .name
= ("min_io_size"), .info = &(qdev_prop_uint16), .offset =
__builtin_offsetof(MSDState, conf.min_io_size) + ((uint16_t*
)0 - (typeof(((MSDState *)0)->conf.min_io_size)*)0), .qtype
= QTYPE_QINT, .defval = (uint16_t)0, }, { .name = ("opt_io_size"
), .info = &(qdev_prop_uint32), .offset = __builtin_offsetof
(MSDState, conf.opt_io_size) + ((uint32_t*)0 - (typeof(((MSDState
*)0)->conf.opt_io_size)*)0), .qtype = QTYPE_QINT, .defval
= (uint32_t)0, }, { .name = ("bootindex"), .info = &(qdev_prop_int32
), .offset = __builtin_offsetof(MSDState, conf.bootindex) + (
(int32_t*)0 - (typeof(((MSDState *)0)->conf.bootindex)*)0)
, .qtype = QTYPE_QINT, .defval = (int32_t)-1, }, { .name = ("discard_granularity"
), .info = &(qdev_prop_uint32), .offset = __builtin_offsetof
(MSDState, conf.discard_granularity) + ((uint32_t*)0 - (typeof
(((MSDState *)0)->conf.discard_granularity)*)0), .qtype = QTYPE_QINT
, .defval = (uint32_t)0, },
666 DEFINE_PROP_STRING("serial", MSDState, serial){ .name = ("serial"), .info = &(qdev_prop_string), .offset
= __builtin_offsetof(MSDState, serial) + ((char**)0 - (typeof
(((MSDState *)0)->serial)*)0), },
667 DEFINE_PROP_BIT("removable", MSDState, removable, 0, false){ .name = ("removable"), .info = &(qdev_prop_bit), .bitnr
= (0), .offset = __builtin_offsetof(MSDState, removable) + (
(uint32_t*)0 - (typeof(((MSDState *)0)->removable)*)0), .qtype
= QTYPE_QBOOL, .defval = (_Bool)0, },
668 DEFINE_PROP_END_OF_LIST(){},
669};
670
671static void usb_msd_class_initfn(ObjectClass *klass, void *data)
672{
673 DeviceClass *dc = DEVICE_CLASS(klass)((DeviceClass *)object_class_dynamic_cast_assert(((ObjectClass
*)((klass))), ("device")));
674 USBDeviceClass *uc = USB_DEVICE_CLASS(klass)((USBDeviceClass *)object_class_dynamic_cast_assert(((ObjectClass
*)((klass))), ("usb-device")));
675
676 uc->init = usb_msd_initfn;
677 uc->product_desc = "QEMU USB MSD";
678 uc->usb_desc = &desc;
679 uc->cancel_packet = usb_msd_cancel_io;
680 uc->handle_attach = usb_desc_attach;
681 uc->handle_reset = usb_msd_handle_reset;
682 uc->handle_control = usb_msd_handle_control;
683 uc->handle_data = usb_msd_handle_data;
684 dc->fw_name = "storage";
685 dc->vmsd = &vmstate_usb_msd;
686 dc->props = msd_properties;
687}
688
689static TypeInfo msd_info = {
690 .name = "usb-storage",
691 .parent = TYPE_USB_DEVICE"usb-device",
692 .instance_size = sizeof(MSDState),
693 .class_init = usb_msd_class_initfn,
694};
695
696static void usb_msd_register_types(void)
697{
698 type_register_static(&msd_info);
699 usb_legacy_register("usb-storage", "disk", usb_msd_init);
700}
701
702type_init(usb_msd_register_types)static void __attribute__((constructor)) do_qemu_init_usb_msd_register_types
(void) { register_module_init(usb_msd_register_types, MODULE_INIT_QOM
); }