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25#include "qemu/osdep.h"
26#include "qapi/error.h"
27#include "qemu/cutils.h"
28#include "block/block_int.h"
29#include "qemu/module.h"
30#include "qemu/option.h"
31#include "block/raw-aio.h"
32#include "trace.h"
33#include "block/thread-pool.h"
34#include "qemu/iov.h"
35#include "qapi/qmp/qdict.h"
36#include "qapi/qmp/qstring.h"
37#include <windows.h>
38#include <winioctl.h>
39
40#define FTYPE_FILE 0
41#define FTYPE_CD 1
42#define FTYPE_HARDDISK 2
43
44typedef struct RawWin32AIOData {
45 BlockDriverState *bs;
46 HANDLE hfile;
47 struct iovec *aio_iov;
48 int aio_niov;
49 size_t aio_nbytes;
50 off64_t aio_offset;
51 int aio_type;
52} RawWin32AIOData;
53
54typedef struct BDRVRawState {
55 HANDLE hfile;
56 int type;
57 char drive_path[16];
58 QEMUWin32AIOState *aio;
59} BDRVRawState;
60
61
62
63
64
65
66
67static size_t handle_aiocb_rw(RawWin32AIOData *aiocb)
68{
69 size_t offset = 0;
70 int i;
71
72 for (i = 0; i < aiocb->aio_niov; i++) {
73 OVERLAPPED ov;
74 DWORD ret, ret_count, len;
75
76 memset(&ov, 0, sizeof(ov));
77 ov.Offset = (aiocb->aio_offset + offset);
78 ov.OffsetHigh = (aiocb->aio_offset + offset) >> 32;
79 len = aiocb->aio_iov[i].iov_len;
80 if (aiocb->aio_type & QEMU_AIO_WRITE) {
81 ret = WriteFile(aiocb->hfile, aiocb->aio_iov[i].iov_base,
82 len, &ret_count, &ov);
83 } else {
84 ret = ReadFile(aiocb->hfile, aiocb->aio_iov[i].iov_base,
85 len, &ret_count, &ov);
86 }
87 if (!ret) {
88 ret_count = 0;
89 }
90 if (ret_count != len) {
91 offset += ret_count;
92 break;
93 }
94 offset += len;
95 }
96
97 return offset;
98}
99
100static int aio_worker(void *arg)
101{
102 RawWin32AIOData *aiocb = arg;
103 ssize_t ret = 0;
104 size_t count;
105
106 switch (aiocb->aio_type & QEMU_AIO_TYPE_MASK) {
107 case QEMU_AIO_READ:
108 count = handle_aiocb_rw(aiocb);
109 if (count < aiocb->aio_nbytes) {
110
111
112 iov_memset(aiocb->aio_iov, aiocb->aio_niov, count,
113 0, aiocb->aio_nbytes - count);
114
115 count = aiocb->aio_nbytes;
116 }
117 if (count == aiocb->aio_nbytes) {
118 ret = 0;
119 } else {
120 ret = -EINVAL;
121 }
122 break;
123 case QEMU_AIO_WRITE:
124 count = handle_aiocb_rw(aiocb);
125 if (count == aiocb->aio_nbytes) {
126 ret = 0;
127 } else {
128 ret = -EINVAL;
129 }
130 break;
131 case QEMU_AIO_FLUSH:
132 if (!FlushFileBuffers(aiocb->hfile)) {
133 return -EIO;
134 }
135 break;
136 default:
137 fprintf(stderr, "invalid aio request (0x%x)\n", aiocb->aio_type);
138 ret = -EINVAL;
139 break;
140 }
141
142 g_free(aiocb);
143 return ret;
144}
145
146static BlockAIOCB *paio_submit(BlockDriverState *bs, HANDLE hfile,
147 int64_t offset, QEMUIOVector *qiov, int count,
148 BlockCompletionFunc *cb, void *opaque, int type)
149{
150 RawWin32AIOData *acb = g_new(RawWin32AIOData, 1);
151 ThreadPool *pool;
152
153 acb->bs = bs;
154 acb->hfile = hfile;
155 acb->aio_type = type;
156
157 if (qiov) {
158 acb->aio_iov = qiov->iov;
159 acb->aio_niov = qiov->niov;
160 assert(qiov->size == count);
161 }
162 acb->aio_nbytes = count;
163 acb->aio_offset = offset;
164
165 trace_file_paio_submit(acb, opaque, offset, count, type);
166 pool = aio_get_thread_pool(bdrv_get_aio_context(bs));
167 return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque);
168}
169
170int qemu_ftruncate64(int fd, int64_t length)
171{
172 LARGE_INTEGER li;
173 DWORD dw;
174 LONG high;
175 HANDLE h;
176 BOOL res;
177
178 if ((GetVersion() & 0x80000000UL) && (length >> 32) != 0)
179 return -1;
180
181 h = (HANDLE)_get_osfhandle(fd);
182
183
184 li.HighPart = 0;
185 li.LowPart = SetFilePointer (h, 0, &li.HighPart, FILE_CURRENT);
186 if (li.LowPart == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) {
187 return -1;
188 }
189
190 high = length >> 32;
191 dw = SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN);
192 if (dw == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) {
193 return -1;
194 }
195 res = SetEndOfFile(h);
196
197
198 SetFilePointer(h, li.LowPart, &li.HighPart, FILE_BEGIN);
199 return res ? 0 : -1;
200}
201
202static int set_sparse(int fd)
203{
204 DWORD returned;
205 return (int) DeviceIoControl((HANDLE)_get_osfhandle(fd), FSCTL_SET_SPARSE,
206 NULL, 0, NULL, 0, &returned, NULL);
207}
208
209static void raw_detach_aio_context(BlockDriverState *bs)
210{
211 BDRVRawState *s = bs->opaque;
212
213 if (s->aio) {
214 win32_aio_detach_aio_context(s->aio, bdrv_get_aio_context(bs));
215 }
216}
217
218static void raw_attach_aio_context(BlockDriverState *bs,
219 AioContext *new_context)
220{
221 BDRVRawState *s = bs->opaque;
222
223 if (s->aio) {
224 win32_aio_attach_aio_context(s->aio, new_context);
225 }
226}
227
228static void raw_probe_alignment(BlockDriverState *bs, Error **errp)
229{
230 BDRVRawState *s = bs->opaque;
231 DWORD sectorsPerCluster, freeClusters, totalClusters, count;
232 DISK_GEOMETRY_EX dg;
233 BOOL status;
234
235 if (s->type == FTYPE_CD) {
236 bs->bl.request_alignment = 2048;
237 return;
238 }
239 if (s->type == FTYPE_HARDDISK) {
240 status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
241 NULL, 0, &dg, sizeof(dg), &count, NULL);
242 if (status != 0) {
243 bs->bl.request_alignment = dg.Geometry.BytesPerSector;
244 return;
245 }
246
247 }
248
249 if (s->drive_path[0]) {
250 GetDiskFreeSpace(s->drive_path, §orsPerCluster,
251 &dg.Geometry.BytesPerSector,
252 &freeClusters, &totalClusters);
253 bs->bl.request_alignment = dg.Geometry.BytesPerSector;
254 return;
255 }
256
257
258 bs->bl.request_alignment = 512;
259}
260
261static void raw_parse_flags(int flags, bool use_aio, int *access_flags,
262 DWORD *overlapped)
263{
264 assert(access_flags != NULL);
265 assert(overlapped != NULL);
266
267 if (flags & BDRV_O_RDWR) {
268 *access_flags = GENERIC_READ | GENERIC_WRITE;
269 } else {
270 *access_flags = GENERIC_READ;
271 }
272
273 *overlapped = FILE_ATTRIBUTE_NORMAL;
274 if (use_aio) {
275 *overlapped |= FILE_FLAG_OVERLAPPED;
276 }
277 if (flags & BDRV_O_NOCACHE) {
278 *overlapped |= FILE_FLAG_NO_BUFFERING;
279 }
280}
281
282static void raw_parse_filename(const char *filename, QDict *options,
283 Error **errp)
284{
285 bdrv_parse_filename_strip_prefix(filename, "file:", options);
286}
287
288static QemuOptsList raw_runtime_opts = {
289 .name = "raw",
290 .head = QTAILQ_HEAD_INITIALIZER(raw_runtime_opts.head),
291 .desc = {
292 {
293 .name = "filename",
294 .type = QEMU_OPT_STRING,
295 .help = "File name of the image",
296 },
297 {
298 .name = "aio",
299 .type = QEMU_OPT_STRING,
300 .help = "host AIO implementation (threads, native)",
301 },
302 {
303 .name = "locking",
304 .type = QEMU_OPT_STRING,
305 .help = "file locking mode (on/off/auto, default: auto)",
306 },
307 { }
308 },
309};
310
311static bool get_aio_option(QemuOpts *opts, int flags, Error **errp)
312{
313 BlockdevAioOptions aio, aio_default;
314
315 aio_default = (flags & BDRV_O_NATIVE_AIO) ? BLOCKDEV_AIO_OPTIONS_NATIVE
316 : BLOCKDEV_AIO_OPTIONS_THREADS;
317 aio = qapi_enum_parse(&BlockdevAioOptions_lookup, qemu_opt_get(opts, "aio"),
318 aio_default, errp);
319
320 switch (aio) {
321 case BLOCKDEV_AIO_OPTIONS_NATIVE:
322 return true;
323 case BLOCKDEV_AIO_OPTIONS_THREADS:
324 return false;
325 default:
326 error_setg(errp, "Invalid AIO option");
327 }
328 return false;
329}
330
331static int raw_open(BlockDriverState *bs, QDict *options, int flags,
332 Error **errp)
333{
334 BDRVRawState *s = bs->opaque;
335 int access_flags;
336 DWORD overlapped;
337 QemuOpts *opts;
338 Error *local_err = NULL;
339 const char *filename;
340 bool use_aio;
341 OnOffAuto locking;
342 int ret;
343
344 s->type = FTYPE_FILE;
345
346 opts = qemu_opts_create(&raw_runtime_opts, NULL, 0, &error_abort);
347 if (!qemu_opts_absorb_qdict(opts, options, errp)) {
348 ret = -EINVAL;
349 goto fail;
350 }
351
352 locking = qapi_enum_parse(&OnOffAuto_lookup,
353 qemu_opt_get(opts, "locking"),
354 ON_OFF_AUTO_AUTO, &local_err);
355 if (local_err) {
356 error_propagate(errp, local_err);
357 ret = -EINVAL;
358 goto fail;
359 }
360 switch (locking) {
361 case ON_OFF_AUTO_ON:
362 error_setg(errp, "locking=on is not supported on Windows");
363 ret = -EINVAL;
364 goto fail;
365 case ON_OFF_AUTO_OFF:
366 case ON_OFF_AUTO_AUTO:
367 break;
368 default:
369 g_assert_not_reached();
370 }
371
372 filename = qemu_opt_get(opts, "filename");
373
374 use_aio = get_aio_option(opts, flags, &local_err);
375 if (local_err) {
376 error_propagate(errp, local_err);
377 ret = -EINVAL;
378 goto fail;
379 }
380
381 raw_parse_flags(flags, use_aio, &access_flags, &overlapped);
382
383 if (filename[0] && filename[1] == ':') {
384 snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", filename[0]);
385 } else if (filename[0] == '\\' && filename[1] == '\\') {
386 s->drive_path[0] = 0;
387 } else {
388
389 char buf[MAX_PATH];
390 GetCurrentDirectory(MAX_PATH, buf);
391 snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", buf[0]);
392 }
393
394 s->hfile = CreateFile(filename, access_flags,
395 FILE_SHARE_READ, NULL,
396 OPEN_EXISTING, overlapped, NULL);
397 if (s->hfile == INVALID_HANDLE_VALUE) {
398 int err = GetLastError();
399
400 error_setg_win32(errp, err, "Could not open '%s'", filename);
401 if (err == ERROR_ACCESS_DENIED) {
402 ret = -EACCES;
403 } else {
404 ret = -EINVAL;
405 }
406 goto fail;
407 }
408
409 if (use_aio) {
410 s->aio = win32_aio_init();
411 if (s->aio == NULL) {
412 CloseHandle(s->hfile);
413 error_setg(errp, "Could not initialize AIO");
414 ret = -EINVAL;
415 goto fail;
416 }
417
418 ret = win32_aio_attach(s->aio, s->hfile);
419 if (ret < 0) {
420 win32_aio_cleanup(s->aio);
421 CloseHandle(s->hfile);
422 error_setg_errno(errp, -ret, "Could not enable AIO");
423 goto fail;
424 }
425
426 win32_aio_attach_aio_context(s->aio, bdrv_get_aio_context(bs));
427 }
428
429
430 bs->supported_truncate_flags = BDRV_REQ_ZERO_WRITE;
431
432 ret = 0;
433fail:
434 qemu_opts_del(opts);
435 return ret;
436}
437
438static BlockAIOCB *raw_aio_preadv(BlockDriverState *bs,
439 uint64_t offset, uint64_t bytes,
440 QEMUIOVector *qiov, int flags,
441 BlockCompletionFunc *cb, void *opaque)
442{
443 BDRVRawState *s = bs->opaque;
444 if (s->aio) {
445 return win32_aio_submit(bs, s->aio, s->hfile, offset, bytes, qiov,
446 cb, opaque, QEMU_AIO_READ);
447 } else {
448 return paio_submit(bs, s->hfile, offset, qiov, bytes,
449 cb, opaque, QEMU_AIO_READ);
450 }
451}
452
453static BlockAIOCB *raw_aio_pwritev(BlockDriverState *bs,
454 uint64_t offset, uint64_t bytes,
455 QEMUIOVector *qiov, int flags,
456 BlockCompletionFunc *cb, void *opaque)
457{
458 BDRVRawState *s = bs->opaque;
459 if (s->aio) {
460 return win32_aio_submit(bs, s->aio, s->hfile, offset, bytes, qiov,
461 cb, opaque, QEMU_AIO_WRITE);
462 } else {
463 return paio_submit(bs, s->hfile, offset, qiov, bytes,
464 cb, opaque, QEMU_AIO_WRITE);
465 }
466}
467
468static BlockAIOCB *raw_aio_flush(BlockDriverState *bs,
469 BlockCompletionFunc *cb, void *opaque)
470{
471 BDRVRawState *s = bs->opaque;
472 return paio_submit(bs, s->hfile, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH);
473}
474
475static void raw_close(BlockDriverState *bs)
476{
477 BDRVRawState *s = bs->opaque;
478
479 if (s->aio) {
480 win32_aio_detach_aio_context(s->aio, bdrv_get_aio_context(bs));
481 win32_aio_cleanup(s->aio);
482 s->aio = NULL;
483 }
484
485 CloseHandle(s->hfile);
486 if (bs->open_flags & BDRV_O_TEMPORARY) {
487 unlink(bs->filename);
488 }
489}
490
491static int coroutine_fn raw_co_truncate(BlockDriverState *bs, int64_t offset,
492 bool exact, PreallocMode prealloc,
493 BdrvRequestFlags flags, Error **errp)
494{
495 BDRVRawState *s = bs->opaque;
496 LONG low, high;
497 DWORD dwPtrLow;
498
499 if (prealloc != PREALLOC_MODE_OFF) {
500 error_setg(errp, "Unsupported preallocation mode '%s'",
501 PreallocMode_str(prealloc));
502 return -ENOTSUP;
503 }
504
505 low = offset;
506 high = offset >> 32;
507
508
509
510
511
512 dwPtrLow = SetFilePointer(s->hfile, low, &high, FILE_BEGIN);
513 if (dwPtrLow == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) {
514 error_setg_win32(errp, GetLastError(), "SetFilePointer error");
515 return -EIO;
516 }
517 if (SetEndOfFile(s->hfile) == 0) {
518 error_setg_win32(errp, GetLastError(), "SetEndOfFile error");
519 return -EIO;
520 }
521 return 0;
522}
523
524static int64_t raw_getlength(BlockDriverState *bs)
525{
526 BDRVRawState *s = bs->opaque;
527 LARGE_INTEGER l;
528 ULARGE_INTEGER available, total, total_free;
529 DISK_GEOMETRY_EX dg;
530 DWORD count;
531 BOOL status;
532
533 switch(s->type) {
534 case FTYPE_FILE:
535 l.LowPart = GetFileSize(s->hfile, (PDWORD)&l.HighPart);
536 if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
537 return -EIO;
538 break;
539 case FTYPE_CD:
540 if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free))
541 return -EIO;
542 l.QuadPart = total.QuadPart;
543 break;
544 case FTYPE_HARDDISK:
545 status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
546 NULL, 0, &dg, sizeof(dg), &count, NULL);
547 if (status != 0) {
548 l = dg.DiskSize;
549 }
550 break;
551 default:
552 return -EIO;
553 }
554 return l.QuadPart;
555}
556
557static int64_t raw_get_allocated_file_size(BlockDriverState *bs)
558{
559 typedef DWORD (WINAPI * get_compressed_t)(const char *filename,
560 DWORD * high);
561 get_compressed_t get_compressed;
562 struct _stati64 st;
563 const char *filename = bs->filename;
564
565 get_compressed =
566 (get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"),
567 "GetCompressedFileSizeA");
568 if (get_compressed) {
569 DWORD high, low;
570 low = get_compressed(filename, &high);
571 if (low != 0xFFFFFFFFlu || GetLastError() == NO_ERROR) {
572 return (((int64_t) high) << 32) + low;
573 }
574 }
575
576 if (_stati64(filename, &st) < 0) {
577 return -1;
578 }
579 return st.st_size;
580}
581
582static int raw_co_create(BlockdevCreateOptions *options, Error **errp)
583{
584 BlockdevCreateOptionsFile *file_opts;
585 int fd;
586
587 assert(options->driver == BLOCKDEV_DRIVER_FILE);
588 file_opts = &options->u.file;
589
590 if (file_opts->has_preallocation) {
591 error_setg(errp, "Preallocation is not supported on Windows");
592 return -EINVAL;
593 }
594 if (file_opts->has_nocow) {
595 error_setg(errp, "nocow is not supported on Windows");
596 return -EINVAL;
597 }
598
599 fd = qemu_create(file_opts->filename, O_WRONLY | O_TRUNC | O_BINARY,
600 0644, errp);
601 if (fd < 0) {
602 return -EIO;
603 }
604 set_sparse(fd);
605 ftruncate(fd, file_opts->size);
606 qemu_close(fd);
607
608 return 0;
609}
610
611static int coroutine_fn raw_co_create_opts(BlockDriver *drv,
612 const char *filename,
613 QemuOpts *opts,
614 Error **errp)
615{
616 BlockdevCreateOptions options;
617 int64_t total_size = 0;
618
619 strstart(filename, "file:", &filename);
620
621
622 total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
623 BDRV_SECTOR_SIZE);
624
625 options = (BlockdevCreateOptions) {
626 .driver = BLOCKDEV_DRIVER_FILE,
627 .u.file = {
628 .filename = (char *) filename,
629 .size = total_size,
630 .has_preallocation = false,
631 .has_nocow = false,
632 },
633 };
634 return raw_co_create(&options, errp);
635}
636
637static QemuOptsList raw_create_opts = {
638 .name = "raw-create-opts",
639 .head = QTAILQ_HEAD_INITIALIZER(raw_create_opts.head),
640 .desc = {
641 {
642 .name = BLOCK_OPT_SIZE,
643 .type = QEMU_OPT_SIZE,
644 .help = "Virtual disk size"
645 },
646 { }
647 }
648};
649
650BlockDriver bdrv_file = {
651 .format_name = "file",
652 .protocol_name = "file",
653 .instance_size = sizeof(BDRVRawState),
654 .bdrv_needs_filename = true,
655 .bdrv_parse_filename = raw_parse_filename,
656 .bdrv_file_open = raw_open,
657 .bdrv_refresh_limits = raw_probe_alignment,
658 .bdrv_close = raw_close,
659 .bdrv_co_create_opts = raw_co_create_opts,
660 .bdrv_has_zero_init = bdrv_has_zero_init_1,
661
662 .bdrv_aio_preadv = raw_aio_preadv,
663 .bdrv_aio_pwritev = raw_aio_pwritev,
664 .bdrv_aio_flush = raw_aio_flush,
665
666 .bdrv_co_truncate = raw_co_truncate,
667 .bdrv_getlength = raw_getlength,
668 .bdrv_get_allocated_file_size
669 = raw_get_allocated_file_size,
670
671 .create_opts = &raw_create_opts,
672};
673
674
675
676
677static int find_cdrom(char *cdrom_name, int cdrom_name_size)
678{
679 char drives[256], *pdrv = drives;
680 UINT type;
681
682 memset(drives, 0, sizeof(drives));
683 GetLogicalDriveStrings(sizeof(drives), drives);
684 while(pdrv[0] != '\0') {
685 type = GetDriveType(pdrv);
686 switch(type) {
687 case DRIVE_CDROM:
688 snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]);
689 return 0;
690 break;
691 }
692 pdrv += lstrlen(pdrv) + 1;
693 }
694 return -1;
695}
696
697static int find_device_type(BlockDriverState *bs, const char *filename)
698{
699 BDRVRawState *s = bs->opaque;
700 UINT type;
701 const char *p;
702
703 if (strstart(filename, "\\\\.\\", &p) ||
704 strstart(filename, "//./", &p)) {
705 if (stristart(p, "PhysicalDrive", NULL))
706 return FTYPE_HARDDISK;
707 snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]);
708 type = GetDriveType(s->drive_path);
709 switch (type) {
710 case DRIVE_REMOVABLE:
711 case DRIVE_FIXED:
712 return FTYPE_HARDDISK;
713 case DRIVE_CDROM:
714 return FTYPE_CD;
715 default:
716 return FTYPE_FILE;
717 }
718 } else {
719 return FTYPE_FILE;
720 }
721}
722
723static int hdev_probe_device(const char *filename)
724{
725 if (strstart(filename, "/dev/cdrom", NULL))
726 return 100;
727 if (is_windows_drive(filename))
728 return 100;
729 return 0;
730}
731
732static void hdev_parse_filename(const char *filename, QDict *options,
733 Error **errp)
734{
735 bdrv_parse_filename_strip_prefix(filename, "host_device:", options);
736}
737
738static void hdev_refresh_limits(BlockDriverState *bs, Error **errp)
739{
740
741 bs->bl.request_alignment = 512;
742}
743
744static int hdev_open(BlockDriverState *bs, QDict *options, int flags,
745 Error **errp)
746{
747 BDRVRawState *s = bs->opaque;
748 int access_flags, create_flags;
749 int ret = 0;
750 DWORD overlapped;
751 char device_name[64];
752
753 Error *local_err = NULL;
754 const char *filename;
755 bool use_aio;
756
757 QemuOpts *opts = qemu_opts_create(&raw_runtime_opts, NULL, 0,
758 &error_abort);
759 if (!qemu_opts_absorb_qdict(opts, options, errp)) {
760 ret = -EINVAL;
761 goto done;
762 }
763
764 filename = qemu_opt_get(opts, "filename");
765
766 use_aio = get_aio_option(opts, flags, &local_err);
767 if (!local_err && use_aio) {
768 error_setg(&local_err, "AIO is not supported on Windows host devices");
769 }
770 if (local_err) {
771 error_propagate(errp, local_err);
772 ret = -EINVAL;
773 goto done;
774 }
775
776 if (strstart(filename, "/dev/cdrom", NULL)) {
777 if (find_cdrom(device_name, sizeof(device_name)) < 0) {
778 error_setg(errp, "Could not open CD-ROM drive");
779 ret = -ENOENT;
780 goto done;
781 }
782 filename = device_name;
783 } else {
784
785 if (((filename[0] >= 'a' && filename[0] <= 'z') ||
786 (filename[0] >= 'A' && filename[0] <= 'Z')) &&
787 filename[1] == ':' && filename[2] == '\0') {
788 snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]);
789 filename = device_name;
790 }
791 }
792 s->type = find_device_type(bs, filename);
793
794 raw_parse_flags(flags, use_aio, &access_flags, &overlapped);
795
796 create_flags = OPEN_EXISTING;
797
798 s->hfile = CreateFile(filename, access_flags,
799 FILE_SHARE_READ, NULL,
800 create_flags, overlapped, NULL);
801 if (s->hfile == INVALID_HANDLE_VALUE) {
802 int err = GetLastError();
803
804 if (err == ERROR_ACCESS_DENIED) {
805 ret = -EACCES;
806 } else {
807 ret = -EINVAL;
808 }
809 error_setg_errno(errp, -ret, "Could not open device");
810 goto done;
811 }
812
813done:
814 qemu_opts_del(opts);
815 return ret;
816}
817
818static BlockDriver bdrv_host_device = {
819 .format_name = "host_device",
820 .protocol_name = "host_device",
821 .instance_size = sizeof(BDRVRawState),
822 .bdrv_needs_filename = true,
823 .bdrv_parse_filename = hdev_parse_filename,
824 .bdrv_probe_device = hdev_probe_device,
825 .bdrv_file_open = hdev_open,
826 .bdrv_close = raw_close,
827 .bdrv_refresh_limits = hdev_refresh_limits,
828
829 .bdrv_aio_preadv = raw_aio_preadv,
830 .bdrv_aio_pwritev = raw_aio_pwritev,
831 .bdrv_aio_flush = raw_aio_flush,
832
833 .bdrv_detach_aio_context = raw_detach_aio_context,
834 .bdrv_attach_aio_context = raw_attach_aio_context,
835
836 .bdrv_getlength = raw_getlength,
837 .has_variable_length = true,
838
839 .bdrv_get_allocated_file_size
840 = raw_get_allocated_file_size,
841};
842
843static void bdrv_file_init(void)
844{
845 bdrv_register(&bdrv_file);
846 bdrv_register(&bdrv_host_device);
847}
848
849block_init(bdrv_file_init);
850
