1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
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
61typedef struct BDRVRawReopenState {
62 HANDLE hfile;
63} BDRVRawReopenState;
64
65
66
67
68
69
70
71static size_t handle_aiocb_rw(RawWin32AIOData *aiocb)
72{
73 size_t offset = 0;
74 int i;
75
76 for (i = 0; i < aiocb->aio_niov; i++) {
77 OVERLAPPED ov;
78 DWORD ret, ret_count, len;
79
80 memset(&ov, 0, sizeof(ov));
81 ov.Offset = (aiocb->aio_offset + offset);
82 ov.OffsetHigh = (aiocb->aio_offset + offset) >> 32;
83 len = aiocb->aio_iov[i].iov_len;
84 if (aiocb->aio_type & QEMU_AIO_WRITE) {
85 ret = WriteFile(aiocb->hfile, aiocb->aio_iov[i].iov_base,
86 len, &ret_count, &ov);
87 } else {
88 ret = ReadFile(aiocb->hfile, aiocb->aio_iov[i].iov_base,
89 len, &ret_count, &ov);
90 }
91 if (!ret) {
92 ret_count = 0;
93 }
94 if (ret_count != len) {
95 offset += ret_count;
96 break;
97 }
98 offset += len;
99 }
100
101 return offset;
102}
103
104static int aio_worker(void *arg)
105{
106 RawWin32AIOData *aiocb = arg;
107 ssize_t ret = 0;
108 size_t count;
109
110 switch (aiocb->aio_type & QEMU_AIO_TYPE_MASK) {
111 case QEMU_AIO_READ:
112 count = handle_aiocb_rw(aiocb);
113 if (count < aiocb->aio_nbytes) {
114
115
116 iov_memset(aiocb->aio_iov, aiocb->aio_niov, count,
117 0, aiocb->aio_nbytes - count);
118
119 count = aiocb->aio_nbytes;
120 }
121 if (count == aiocb->aio_nbytes) {
122 ret = 0;
123 } else {
124 ret = -EINVAL;
125 }
126 break;
127 case QEMU_AIO_WRITE:
128 count = handle_aiocb_rw(aiocb);
129 if (count == aiocb->aio_nbytes) {
130 ret = 0;
131 } else {
132 ret = -EINVAL;
133 }
134 break;
135 case QEMU_AIO_FLUSH:
136 if (!FlushFileBuffers(aiocb->hfile)) {
137 return -EIO;
138 }
139 break;
140 default:
141 fprintf(stderr, "invalid aio request (0x%x)\n", aiocb->aio_type);
142 ret = -EINVAL;
143 break;
144 }
145
146 g_free(aiocb);
147 return ret;
148}
149
150static BlockAIOCB *paio_submit(BlockDriverState *bs, HANDLE hfile,
151 int64_t offset, QEMUIOVector *qiov, int count,
152 BlockCompletionFunc *cb, void *opaque, int type)
153{
154 RawWin32AIOData *acb = g_new(RawWin32AIOData, 1);
155 ThreadPool *pool;
156
157 acb->bs = bs;
158 acb->hfile = hfile;
159 acb->aio_type = type;
160
161 if (qiov) {
162 acb->aio_iov = qiov->iov;
163 acb->aio_niov = qiov->niov;
164 assert(qiov->size == count);
165 }
166 acb->aio_nbytes = count;
167 acb->aio_offset = offset;
168
169 trace_file_paio_submit(acb, opaque, offset, count, type);
170 pool = aio_get_thread_pool(bdrv_get_aio_context(bs));
171 return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque);
172}
173
174int qemu_ftruncate64(int fd, int64_t length)
175{
176 LARGE_INTEGER li;
177 DWORD dw;
178 LONG high;
179 HANDLE h;
180 BOOL res;
181
182 if ((GetVersion() & 0x80000000UL) && (length >> 32) != 0)
183 return -1;
184
185 h = (HANDLE)_get_osfhandle(fd);
186
187
188 li.HighPart = 0;
189 li.LowPart = SetFilePointer (h, 0, &li.HighPart, FILE_CURRENT);
190 if (li.LowPart == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) {
191 return -1;
192 }
193
194 high = length >> 32;
195 dw = SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN);
196 if (dw == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) {
197 return -1;
198 }
199 res = SetEndOfFile(h);
200
201
202 SetFilePointer(h, li.LowPart, &li.HighPart, FILE_BEGIN);
203 return res ? 0 : -1;
204}
205
206static int set_sparse(int fd)
207{
208 DWORD returned;
209 return (int) DeviceIoControl((HANDLE)_get_osfhandle(fd), FSCTL_SET_SPARSE,
210 NULL, 0, NULL, 0, &returned, NULL);
211}
212
213static void raw_detach_aio_context(BlockDriverState *bs)
214{
215 BDRVRawState *s = bs->opaque;
216
217 if (s->aio) {
218 win32_aio_detach_aio_context(s->aio, bdrv_get_aio_context(bs));
219 }
220}
221
222static void raw_attach_aio_context(BlockDriverState *bs,
223 AioContext *new_context)
224{
225 BDRVRawState *s = bs->opaque;
226
227 if (s->aio) {
228 win32_aio_attach_aio_context(s->aio, new_context);
229 }
230}
231
232static void raw_probe_alignment(BlockDriverState *bs, Error **errp)
233{
234 BDRVRawState *s = bs->opaque;
235 DWORD sectorsPerCluster, freeClusters, totalClusters, count;
236 DISK_GEOMETRY_EX dg;
237 BOOL status;
238
239 if (s->type == FTYPE_CD) {
240 bs->bl.request_alignment = 2048;
241 return;
242 }
243 if (s->type == FTYPE_HARDDISK) {
244 status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
245 NULL, 0, &dg, sizeof(dg), &count, NULL);
246 if (status != 0) {
247 bs->bl.request_alignment = dg.Geometry.BytesPerSector;
248 return;
249 }
250
251 }
252
253 if (s->drive_path[0]) {
254 GetDiskFreeSpace(s->drive_path, §orsPerCluster,
255 &dg.Geometry.BytesPerSector,
256 &freeClusters, &totalClusters);
257 bs->bl.request_alignment = dg.Geometry.BytesPerSector;
258 return;
259 }
260
261
262 bs->bl.request_alignment = 512;
263}
264
265static void raw_parse_flags(int flags, bool use_aio, int *access_flags,
266 DWORD *overlapped)
267{
268 assert(access_flags != NULL);
269 assert(overlapped != NULL);
270
271 if (flags & BDRV_O_RDWR) {
272 *access_flags = GENERIC_READ | GENERIC_WRITE;
273 } else {
274 *access_flags = GENERIC_READ;
275 }
276
277 *overlapped = FILE_ATTRIBUTE_NORMAL;
278 if (use_aio) {
279 *overlapped |= FILE_FLAG_OVERLAPPED;
280 }
281 if (flags & BDRV_O_NOCACHE) {
282 *overlapped |= FILE_FLAG_NO_BUFFERING;
283 }
284}
285
286static void raw_parse_filename(const char *filename, QDict *options,
287 Error **errp)
288{
289 bdrv_parse_filename_strip_prefix(filename, "file:", options);
290}
291
292static QemuOptsList raw_runtime_opts = {
293 .name = "raw",
294 .head = QTAILQ_HEAD_INITIALIZER(raw_runtime_opts.head),
295 .desc = {
296 {
297 .name = "filename",
298 .type = QEMU_OPT_STRING,
299 .help = "File name of the image",
300 },
301 {
302 .name = "aio",
303 .type = QEMU_OPT_STRING,
304 .help = "host AIO implementation (threads, native)",
305 },
306 {
307 .name = "locking",
308 .type = QEMU_OPT_STRING,
309 .help = "file locking mode (on/off/auto, default: auto)",
310 },
311 { }
312 },
313};
314
315static bool get_aio_option(QemuOpts *opts, int flags, Error **errp)
316{
317 BlockdevAioOptions aio, aio_default;
318
319 aio_default = (flags & BDRV_O_NATIVE_AIO) ? BLOCKDEV_AIO_OPTIONS_NATIVE
320 : BLOCKDEV_AIO_OPTIONS_THREADS;
321 aio = qapi_enum_parse(&BlockdevAioOptions_lookup, qemu_opt_get(opts, "aio"),
322 aio_default, errp);
323
324 switch (aio) {
325 case BLOCKDEV_AIO_OPTIONS_NATIVE:
326 return true;
327 case BLOCKDEV_AIO_OPTIONS_THREADS:
328 return false;
329 default:
330 error_setg(errp, "Invalid AIO option");
331 }
332 return false;
333}
334
335static int raw_open(BlockDriverState *bs, QDict *options, int flags,
336 Error **errp)
337{
338 BDRVRawState *s = bs->opaque;
339 int access_flags;
340 DWORD overlapped;
341 QemuOpts *opts;
342 Error *local_err = NULL;
343 const char *filename;
344 bool use_aio;
345 OnOffAuto locking;
346 int ret;
347
348 s->type = FTYPE_FILE;
349
350 opts = qemu_opts_create(&raw_runtime_opts, NULL, 0, &error_abort);
351 if (!qemu_opts_absorb_qdict(opts, options, errp)) {
352 ret = -EINVAL;
353 goto fail;
354 }
355
356 locking = qapi_enum_parse(&OnOffAuto_lookup,
357 qemu_opt_get(opts, "locking"),
358 ON_OFF_AUTO_AUTO, &local_err);
359 if (local_err) {
360 error_propagate(errp, local_err);
361 ret = -EINVAL;
362 goto fail;
363 }
364 switch (locking) {
365 case ON_OFF_AUTO_ON:
366 error_setg(errp, "locking=on is not supported on Windows");
367 ret = -EINVAL;
368 goto fail;
369 case ON_OFF_AUTO_OFF:
370 case ON_OFF_AUTO_AUTO:
371 break;
372 default:
373 g_assert_not_reached();
374 }
375
376 filename = qemu_opt_get(opts, "filename");
377
378 use_aio = get_aio_option(opts, flags, &local_err);
379 if (local_err) {
380 error_propagate(errp, local_err);
381 ret = -EINVAL;
382 goto fail;
383 }
384
385 raw_parse_flags(flags, use_aio, &access_flags, &overlapped);
386
387 if (filename[0] && filename[1] == ':') {
388 snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", filename[0]);
389 } else if (filename[0] == '\\' && filename[1] == '\\') {
390 s->drive_path[0] = 0;
391 } else {
392
393 char buf[MAX_PATH];
394 GetCurrentDirectory(MAX_PATH, buf);
395 snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", buf[0]);
396 }
397
398 s->hfile = CreateFile(filename, access_flags,
399 FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
400 OPEN_EXISTING, overlapped, NULL);
401 if (s->hfile == INVALID_HANDLE_VALUE) {
402 int err = GetLastError();
403
404 error_setg_win32(errp, err, "Could not open '%s'", filename);
405 if (err == ERROR_ACCESS_DENIED) {
406 ret = -EACCES;
407 } else {
408 ret = -EINVAL;
409 }
410 goto fail;
411 }
412
413 if (use_aio) {
414 s->aio = win32_aio_init();
415 if (s->aio == NULL) {
416 CloseHandle(s->hfile);
417 error_setg(errp, "Could not initialize AIO");
418 ret = -EINVAL;
419 goto fail;
420 }
421
422 ret = win32_aio_attach(s->aio, s->hfile);
423 if (ret < 0) {
424 win32_aio_cleanup(s->aio);
425 CloseHandle(s->hfile);
426 error_setg_errno(errp, -ret, "Could not enable AIO");
427 goto fail;
428 }
429
430 win32_aio_attach_aio_context(s->aio, bdrv_get_aio_context(bs));
431 }
432
433
434 bs->supported_truncate_flags = BDRV_REQ_ZERO_WRITE;
435
436 ret = 0;
437fail:
438 qemu_opts_del(opts);
439 return ret;
440}
441
442static BlockAIOCB *raw_aio_preadv(BlockDriverState *bs,
443 int64_t offset, int64_t bytes,
444 QEMUIOVector *qiov, BdrvRequestFlags flags,
445 BlockCompletionFunc *cb, void *opaque)
446{
447 BDRVRawState *s = bs->opaque;
448 if (s->aio) {
449 return win32_aio_submit(bs, s->aio, s->hfile, offset, bytes, qiov,
450 cb, opaque, QEMU_AIO_READ);
451 } else {
452 return paio_submit(bs, s->hfile, offset, qiov, bytes,
453 cb, opaque, QEMU_AIO_READ);
454 }
455}
456
457static BlockAIOCB *raw_aio_pwritev(BlockDriverState *bs,
458 int64_t offset, int64_t bytes,
459 QEMUIOVector *qiov, BdrvRequestFlags flags,
460 BlockCompletionFunc *cb, void *opaque)
461{
462 BDRVRawState *s = bs->opaque;
463 if (s->aio) {
464 return win32_aio_submit(bs, s->aio, s->hfile, offset, bytes, qiov,
465 cb, opaque, QEMU_AIO_WRITE);
466 } else {
467 return paio_submit(bs, s->hfile, offset, qiov, bytes,
468 cb, opaque, QEMU_AIO_WRITE);
469 }
470}
471
472static BlockAIOCB *raw_aio_flush(BlockDriverState *bs,
473 BlockCompletionFunc *cb, void *opaque)
474{
475 BDRVRawState *s = bs->opaque;
476 return paio_submit(bs, s->hfile, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH);
477}
478
479static void raw_close(BlockDriverState *bs)
480{
481 BDRVRawState *s = bs->opaque;
482
483 if (s->aio) {
484 win32_aio_detach_aio_context(s->aio, bdrv_get_aio_context(bs));
485 win32_aio_cleanup(s->aio);
486 s->aio = NULL;
487 }
488
489 CloseHandle(s->hfile);
490 if (bs->open_flags & BDRV_O_TEMPORARY) {
491 unlink(bs->filename);
492 }
493}
494
495static int coroutine_fn raw_co_truncate(BlockDriverState *bs, int64_t offset,
496 bool exact, PreallocMode prealloc,
497 BdrvRequestFlags flags, Error **errp)
498{
499 BDRVRawState *s = bs->opaque;
500 LONG low, high;
501 DWORD dwPtrLow;
502
503 if (prealloc != PREALLOC_MODE_OFF) {
504 error_setg(errp, "Unsupported preallocation mode '%s'",
505 PreallocMode_str(prealloc));
506 return -ENOTSUP;
507 }
508
509 low = offset;
510 high = offset >> 32;
511
512
513
514
515
516 dwPtrLow = SetFilePointer(s->hfile, low, &high, FILE_BEGIN);
517 if (dwPtrLow == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) {
518 error_setg_win32(errp, GetLastError(), "SetFilePointer error");
519 return -EIO;
520 }
521 if (SetEndOfFile(s->hfile) == 0) {
522 error_setg_win32(errp, GetLastError(), "SetEndOfFile error");
523 return -EIO;
524 }
525 return 0;
526}
527
528static int64_t raw_getlength(BlockDriverState *bs)
529{
530 BDRVRawState *s = bs->opaque;
531 LARGE_INTEGER l;
532 ULARGE_INTEGER available, total, total_free;
533 DISK_GEOMETRY_EX dg;
534 DWORD count;
535 BOOL status;
536
537 switch(s->type) {
538 case FTYPE_FILE:
539 l.LowPart = GetFileSize(s->hfile, (PDWORD)&l.HighPart);
540 if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
541 return -EIO;
542 break;
543 case FTYPE_CD:
544 if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free))
545 return -EIO;
546 l.QuadPart = total.QuadPart;
547 break;
548 case FTYPE_HARDDISK:
549 status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
550 NULL, 0, &dg, sizeof(dg), &count, NULL);
551 if (status != 0) {
552 l = dg.DiskSize;
553 }
554 break;
555 default:
556 return -EIO;
557 }
558 return l.QuadPart;
559}
560
561static int64_t raw_get_allocated_file_size(BlockDriverState *bs)
562{
563 typedef DWORD (WINAPI * get_compressed_t)(const char *filename,
564 DWORD * high);
565 get_compressed_t get_compressed;
566 struct _stati64 st;
567 const char *filename = bs->filename;
568
569 get_compressed =
570 (get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"),
571 "GetCompressedFileSizeA");
572 if (get_compressed) {
573 DWORD high, low;
574 low = get_compressed(filename, &high);
575 if (low != 0xFFFFFFFFlu || GetLastError() == NO_ERROR) {
576 return (((int64_t) high) << 32) + low;
577 }
578 }
579
580 if (_stati64(filename, &st) < 0) {
581 return -1;
582 }
583 return st.st_size;
584}
585
586static int raw_co_create(BlockdevCreateOptions *options, Error **errp)
587{
588 BlockdevCreateOptionsFile *file_opts;
589 int fd;
590
591 assert(options->driver == BLOCKDEV_DRIVER_FILE);
592 file_opts = &options->u.file;
593
594 if (file_opts->has_preallocation) {
595 error_setg(errp, "Preallocation is not supported on Windows");
596 return -EINVAL;
597 }
598 if (file_opts->has_nocow) {
599 error_setg(errp, "nocow is not supported on Windows");
600 return -EINVAL;
601 }
602
603 fd = qemu_create(file_opts->filename, O_WRONLY | O_TRUNC | O_BINARY,
604 0644, errp);
605 if (fd < 0) {
606 return -EIO;
607 }
608 set_sparse(fd);
609 ftruncate(fd, file_opts->size);
610 qemu_close(fd);
611
612 return 0;
613}
614
615static int coroutine_fn raw_co_create_opts(BlockDriver *drv,
616 const char *filename,
617 QemuOpts *opts,
618 Error **errp)
619{
620 BlockdevCreateOptions options;
621 int64_t total_size = 0;
622
623 strstart(filename, "file:", &filename);
624
625
626 total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
627 BDRV_SECTOR_SIZE);
628
629 options = (BlockdevCreateOptions) {
630 .driver = BLOCKDEV_DRIVER_FILE,
631 .u.file = {
632 .filename = (char *) filename,
633 .size = total_size,
634 .has_preallocation = false,
635 .has_nocow = false,
636 },
637 };
638 return raw_co_create(&options, errp);
639}
640
641static int raw_reopen_prepare(BDRVReopenState *state,
642 BlockReopenQueue *queue, Error **errp)
643{
644 BDRVRawState *s = state->bs->opaque;
645 BDRVRawReopenState *rs;
646 int access_flags;
647 DWORD overlapped;
648 int ret = 0;
649
650 if (s->type != FTYPE_FILE) {
651 error_setg(errp, "Can only reopen files");
652 return -EINVAL;
653 }
654
655 rs = g_new0(BDRVRawReopenState, 1);
656
657
658
659
660
661
662
663
664 raw_parse_flags(state->flags, s->aio != NULL, &access_flags, &overlapped);
665 rs->hfile = CreateFile(state->bs->filename, access_flags,
666 FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
667 OPEN_EXISTING, overlapped, NULL);
668
669 if (rs->hfile == INVALID_HANDLE_VALUE) {
670 int err = GetLastError();
671
672 error_setg_win32(errp, err, "Could not reopen '%s'",
673 state->bs->filename);
674 if (err == ERROR_ACCESS_DENIED) {
675 ret = -EACCES;
676 } else {
677 ret = -EINVAL;
678 }
679 goto fail;
680 }
681
682 if (s->aio) {
683 ret = win32_aio_attach(s->aio, rs->hfile);
684 if (ret < 0) {
685 error_setg_errno(errp, -ret, "Could not enable AIO");
686 CloseHandle(rs->hfile);
687 goto fail;
688 }
689 }
690
691 state->opaque = rs;
692
693 return 0;
694
695fail:
696 g_free(rs);
697 state->opaque = NULL;
698
699 return ret;
700}
701
702static void raw_reopen_commit(BDRVReopenState *state)
703{
704 BDRVRawState *s = state->bs->opaque;
705 BDRVRawReopenState *rs = state->opaque;
706
707 assert(rs != NULL);
708
709 CloseHandle(s->hfile);
710 s->hfile = rs->hfile;
711
712 g_free(rs);
713 state->opaque = NULL;
714}
715
716static void raw_reopen_abort(BDRVReopenState *state)
717{
718 BDRVRawReopenState *rs = state->opaque;
719
720 if (!rs) {
721 return;
722 }
723
724 if (rs->hfile != INVALID_HANDLE_VALUE) {
725 CloseHandle(rs->hfile);
726 }
727
728 g_free(rs);
729 state->opaque = NULL;
730}
731
732static QemuOptsList raw_create_opts = {
733 .name = "raw-create-opts",
734 .head = QTAILQ_HEAD_INITIALIZER(raw_create_opts.head),
735 .desc = {
736 {
737 .name = BLOCK_OPT_SIZE,
738 .type = QEMU_OPT_SIZE,
739 .help = "Virtual disk size"
740 },
741 { }
742 }
743};
744
745BlockDriver bdrv_file = {
746 .format_name = "file",
747 .protocol_name = "file",
748 .instance_size = sizeof(BDRVRawState),
749 .bdrv_needs_filename = true,
750 .bdrv_parse_filename = raw_parse_filename,
751 .bdrv_file_open = raw_open,
752 .bdrv_refresh_limits = raw_probe_alignment,
753 .bdrv_close = raw_close,
754 .bdrv_co_create_opts = raw_co_create_opts,
755 .bdrv_has_zero_init = bdrv_has_zero_init_1,
756
757 .bdrv_reopen_prepare = raw_reopen_prepare,
758 .bdrv_reopen_commit = raw_reopen_commit,
759 .bdrv_reopen_abort = raw_reopen_abort,
760
761 .bdrv_aio_preadv = raw_aio_preadv,
762 .bdrv_aio_pwritev = raw_aio_pwritev,
763 .bdrv_aio_flush = raw_aio_flush,
764
765 .bdrv_co_truncate = raw_co_truncate,
766 .bdrv_getlength = raw_getlength,
767 .bdrv_get_allocated_file_size
768 = raw_get_allocated_file_size,
769
770 .create_opts = &raw_create_opts,
771};
772
773
774
775
776static int find_cdrom(char *cdrom_name, int cdrom_name_size)
777{
778 char drives[256], *pdrv = drives;
779 UINT type;
780
781 memset(drives, 0, sizeof(drives));
782 GetLogicalDriveStrings(sizeof(drives), drives);
783 while(pdrv[0] != '\0') {
784 type = GetDriveType(pdrv);
785 switch(type) {
786 case DRIVE_CDROM:
787 snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]);
788 return 0;
789 break;
790 }
791 pdrv += lstrlen(pdrv) + 1;
792 }
793 return -1;
794}
795
796static int find_device_type(BlockDriverState *bs, const char *filename)
797{
798 BDRVRawState *s = bs->opaque;
799 UINT type;
800 const char *p;
801
802 if (strstart(filename, "\\\\.\\", &p) ||
803 strstart(filename, "//./", &p)) {
804 if (stristart(p, "PhysicalDrive", NULL))
805 return FTYPE_HARDDISK;
806 snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]);
807 type = GetDriveType(s->drive_path);
808 switch (type) {
809 case DRIVE_REMOVABLE:
810 case DRIVE_FIXED:
811 return FTYPE_HARDDISK;
812 case DRIVE_CDROM:
813 return FTYPE_CD;
814 default:
815 return FTYPE_FILE;
816 }
817 } else {
818 return FTYPE_FILE;
819 }
820}
821
822static int hdev_probe_device(const char *filename)
823{
824 if (strstart(filename, "/dev/cdrom", NULL))
825 return 100;
826 if (is_windows_drive(filename))
827 return 100;
828 return 0;
829}
830
831static void hdev_parse_filename(const char *filename, QDict *options,
832 Error **errp)
833{
834 bdrv_parse_filename_strip_prefix(filename, "host_device:", options);
835}
836
837static void hdev_refresh_limits(BlockDriverState *bs, Error **errp)
838{
839
840 bs->bl.request_alignment = 512;
841}
842
843static int hdev_open(BlockDriverState *bs, QDict *options, int flags,
844 Error **errp)
845{
846 BDRVRawState *s = bs->opaque;
847 int access_flags, create_flags;
848 int ret = 0;
849 DWORD overlapped;
850 char device_name[64];
851
852 Error *local_err = NULL;
853 const char *filename;
854 bool use_aio;
855
856 QemuOpts *opts = qemu_opts_create(&raw_runtime_opts, NULL, 0,
857 &error_abort);
858 if (!qemu_opts_absorb_qdict(opts, options, errp)) {
859 ret = -EINVAL;
860 goto done;
861 }
862
863 filename = qemu_opt_get(opts, "filename");
864
865 use_aio = get_aio_option(opts, flags, &local_err);
866 if (!local_err && use_aio) {
867 error_setg(&local_err, "AIO is not supported on Windows host devices");
868 }
869 if (local_err) {
870 error_propagate(errp, local_err);
871 ret = -EINVAL;
872 goto done;
873 }
874
875 if (strstart(filename, "/dev/cdrom", NULL)) {
876 if (find_cdrom(device_name, sizeof(device_name)) < 0) {
877 error_setg(errp, "Could not open CD-ROM drive");
878 ret = -ENOENT;
879 goto done;
880 }
881 filename = device_name;
882 } else {
883
884 if (((filename[0] >= 'a' && filename[0] <= 'z') ||
885 (filename[0] >= 'A' && filename[0] <= 'Z')) &&
886 filename[1] == ':' && filename[2] == '\0') {
887 snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]);
888 filename = device_name;
889 }
890 }
891 s->type = find_device_type(bs, filename);
892
893 raw_parse_flags(flags, use_aio, &access_flags, &overlapped);
894
895 create_flags = OPEN_EXISTING;
896
897 s->hfile = CreateFile(filename, access_flags,
898 FILE_SHARE_READ, NULL,
899 create_flags, overlapped, NULL);
900 if (s->hfile == INVALID_HANDLE_VALUE) {
901 int err = GetLastError();
902
903 if (err == ERROR_ACCESS_DENIED) {
904 ret = -EACCES;
905 } else {
906 ret = -EINVAL;
907 }
908 error_setg_errno(errp, -ret, "Could not open device");
909 goto done;
910 }
911
912done:
913 qemu_opts_del(opts);
914 return ret;
915}
916
917static BlockDriver bdrv_host_device = {
918 .format_name = "host_device",
919 .protocol_name = "host_device",
920 .instance_size = sizeof(BDRVRawState),
921 .bdrv_needs_filename = true,
922 .bdrv_parse_filename = hdev_parse_filename,
923 .bdrv_probe_device = hdev_probe_device,
924 .bdrv_file_open = hdev_open,
925 .bdrv_close = raw_close,
926 .bdrv_refresh_limits = hdev_refresh_limits,
927
928 .bdrv_aio_preadv = raw_aio_preadv,
929 .bdrv_aio_pwritev = raw_aio_pwritev,
930 .bdrv_aio_flush = raw_aio_flush,
931
932 .bdrv_detach_aio_context = raw_detach_aio_context,
933 .bdrv_attach_aio_context = raw_attach_aio_context,
934
935 .bdrv_getlength = raw_getlength,
936 .has_variable_length = true,
937
938 .bdrv_get_allocated_file_size
939 = raw_get_allocated_file_size,
940};
941
942static void bdrv_file_init(void)
943{
944 bdrv_register(&bdrv_file);
945 bdrv_register(&bdrv_host_device);
946}
947
948block_init(bdrv_file_init);
949
