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Commit | Line | Data |
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223d4670 TS |
1 | /* |
2 | * Block driver for RAW files (win32) | |
3 | * | |
4 | * Copyright (c) 2006 Fabrice Bellard | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
24 | #include "qemu-common.h" | |
1de7afc9 | 25 | #include "qemu/timer.h" |
737e150e | 26 | #include "block/block_int.h" |
1de7afc9 | 27 | #include "qemu/module.h" |
fc4edb84 PB |
28 | #include "raw-aio.h" |
29 | #include "trace.h" | |
737e150e | 30 | #include "block/thread-pool.h" |
1de7afc9 | 31 | #include "qemu/iov.h" |
49dc768d | 32 | #include <windows.h> |
223d4670 TS |
33 | #include <winioctl.h> |
34 | ||
35 | #define FTYPE_FILE 0 | |
36 | #define FTYPE_CD 1 | |
37 | #define FTYPE_HARDDISK 2 | |
38 | ||
a2736526 PB |
39 | static QEMUWin32AIOState *aio; |
40 | ||
fc4edb84 PB |
41 | typedef struct RawWin32AIOData { |
42 | BlockDriverState *bs; | |
43 | HANDLE hfile; | |
44 | struct iovec *aio_iov; | |
45 | int aio_niov; | |
46 | size_t aio_nbytes; | |
47 | off64_t aio_offset; | |
48 | int aio_type; | |
49 | } RawWin32AIOData; | |
50 | ||
223d4670 TS |
51 | typedef struct BDRVRawState { |
52 | HANDLE hfile; | |
53 | int type; | |
54 | char drive_path[16]; /* format: "d:\" */ | |
a2736526 | 55 | QEMUWin32AIOState *aio; |
223d4670 TS |
56 | } BDRVRawState; |
57 | ||
fc4edb84 PB |
58 | /* |
59 | * Read/writes the data to/from a given linear buffer. | |
60 | * | |
61 | * Returns the number of bytes handles or -errno in case of an error. Short | |
62 | * reads are only returned if the end of the file is reached. | |
63 | */ | |
64 | static size_t handle_aiocb_rw(RawWin32AIOData *aiocb) | |
65 | { | |
66 | size_t offset = 0; | |
67 | int i; | |
68 | ||
69 | for (i = 0; i < aiocb->aio_niov; i++) { | |
70 | OVERLAPPED ov; | |
71 | DWORD ret, ret_count, len; | |
72 | ||
73 | memset(&ov, 0, sizeof(ov)); | |
74 | ov.Offset = (aiocb->aio_offset + offset); | |
75 | ov.OffsetHigh = (aiocb->aio_offset + offset) >> 32; | |
76 | len = aiocb->aio_iov[i].iov_len; | |
77 | if (aiocb->aio_type & QEMU_AIO_WRITE) { | |
78 | ret = WriteFile(aiocb->hfile, aiocb->aio_iov[i].iov_base, | |
79 | len, &ret_count, &ov); | |
80 | } else { | |
81 | ret = ReadFile(aiocb->hfile, aiocb->aio_iov[i].iov_base, | |
82 | len, &ret_count, &ov); | |
83 | } | |
84 | if (!ret) { | |
85 | ret_count = 0; | |
86 | } | |
87 | if (ret_count != len) { | |
88 | break; | |
89 | } | |
90 | offset += len; | |
91 | } | |
92 | ||
93 | return offset; | |
94 | } | |
95 | ||
96 | static int aio_worker(void *arg) | |
97 | { | |
98 | RawWin32AIOData *aiocb = arg; | |
99 | ssize_t ret = 0; | |
100 | size_t count; | |
101 | ||
102 | switch (aiocb->aio_type & QEMU_AIO_TYPE_MASK) { | |
103 | case QEMU_AIO_READ: | |
104 | count = handle_aiocb_rw(aiocb); | |
105 | if (count < aiocb->aio_nbytes && aiocb->bs->growable) { | |
106 | /* A short read means that we have reached EOF. Pad the buffer | |
107 | * with zeros for bytes after EOF. */ | |
108 | iov_memset(aiocb->aio_iov, aiocb->aio_niov, count, | |
109 | 0, aiocb->aio_nbytes - count); | |
110 | ||
111 | count = aiocb->aio_nbytes; | |
112 | } | |
113 | if (count == aiocb->aio_nbytes) { | |
114 | ret = 0; | |
115 | } else { | |
116 | ret = -EINVAL; | |
117 | } | |
118 | break; | |
119 | case QEMU_AIO_WRITE: | |
120 | count = handle_aiocb_rw(aiocb); | |
121 | if (count == aiocb->aio_nbytes) { | |
122 | count = 0; | |
123 | } else { | |
124 | count = -EINVAL; | |
125 | } | |
126 | break; | |
127 | case QEMU_AIO_FLUSH: | |
128 | if (!FlushFileBuffers(aiocb->hfile)) { | |
129 | return -EIO; | |
130 | } | |
131 | break; | |
132 | default: | |
133 | fprintf(stderr, "invalid aio request (0x%x)\n", aiocb->aio_type); | |
134 | ret = -EINVAL; | |
135 | break; | |
136 | } | |
137 | ||
138 | g_slice_free(RawWin32AIOData, aiocb); | |
139 | return ret; | |
140 | } | |
141 | ||
142 | static BlockDriverAIOCB *paio_submit(BlockDriverState *bs, HANDLE hfile, | |
143 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
144 | BlockDriverCompletionFunc *cb, void *opaque, int type) | |
145 | { | |
146 | RawWin32AIOData *acb = g_slice_new(RawWin32AIOData); | |
c4d9d196 | 147 | ThreadPool *pool; |
fc4edb84 PB |
148 | |
149 | acb->bs = bs; | |
150 | acb->hfile = hfile; | |
151 | acb->aio_type = type; | |
152 | ||
153 | if (qiov) { | |
154 | acb->aio_iov = qiov->iov; | |
155 | acb->aio_niov = qiov->niov; | |
156 | } | |
157 | acb->aio_nbytes = nb_sectors * 512; | |
158 | acb->aio_offset = sector_num * 512; | |
159 | ||
160 | trace_paio_submit(acb, opaque, sector_num, nb_sectors, type); | |
c4d9d196 SH |
161 | pool = aio_get_thread_pool(bdrv_get_aio_context(bs)); |
162 | return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque); | |
fc4edb84 PB |
163 | } |
164 | ||
223d4670 TS |
165 | int qemu_ftruncate64(int fd, int64_t length) |
166 | { | |
167 | LARGE_INTEGER li; | |
2c993ec2 | 168 | DWORD dw; |
223d4670 TS |
169 | LONG high; |
170 | HANDLE h; | |
171 | BOOL res; | |
172 | ||
173 | if ((GetVersion() & 0x80000000UL) && (length >> 32) != 0) | |
174 | return -1; | |
175 | ||
176 | h = (HANDLE)_get_osfhandle(fd); | |
177 | ||
178 | /* get current position, ftruncate do not change position */ | |
179 | li.HighPart = 0; | |
180 | li.LowPart = SetFilePointer (h, 0, &li.HighPart, FILE_CURRENT); | |
2c993ec2 | 181 | if (li.LowPart == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) { |
223d4670 | 182 | return -1; |
2c993ec2 | 183 | } |
223d4670 TS |
184 | |
185 | high = length >> 32; | |
2c993ec2 SW |
186 | dw = SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN); |
187 | if (dw == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) { | |
223d4670 | 188 | return -1; |
2c993ec2 | 189 | } |
223d4670 TS |
190 | res = SetEndOfFile(h); |
191 | ||
192 | /* back to old position */ | |
193 | SetFilePointer(h, li.LowPart, &li.HighPart, FILE_BEGIN); | |
194 | return res ? 0 : -1; | |
195 | } | |
196 | ||
197 | static int set_sparse(int fd) | |
198 | { | |
199 | DWORD returned; | |
200 | return (int) DeviceIoControl((HANDLE)_get_osfhandle(fd), FSCTL_SET_SPARSE, | |
201 | NULL, 0, NULL, 0, &returned, NULL); | |
202 | } | |
203 | ||
6a8dc042 JC |
204 | static void raw_parse_flags(int flags, int *access_flags, DWORD *overlapped) |
205 | { | |
206 | assert(access_flags != NULL); | |
207 | assert(overlapped != NULL); | |
208 | ||
209 | if (flags & BDRV_O_RDWR) { | |
210 | *access_flags = GENERIC_READ | GENERIC_WRITE; | |
211 | } else { | |
212 | *access_flags = GENERIC_READ; | |
213 | } | |
214 | ||
215 | *overlapped = FILE_ATTRIBUTE_NORMAL; | |
a2736526 PB |
216 | if (flags & BDRV_O_NATIVE_AIO) { |
217 | *overlapped |= FILE_FLAG_OVERLAPPED; | |
218 | } | |
6a8dc042 JC |
219 | if (flags & BDRV_O_NOCACHE) { |
220 | *overlapped |= FILE_FLAG_NO_BUFFERING; | |
221 | } | |
6a8dc042 JC |
222 | } |
223 | ||
8a79380b KW |
224 | static QemuOptsList raw_runtime_opts = { |
225 | .name = "raw", | |
226 | .head = QTAILQ_HEAD_INITIALIZER(raw_runtime_opts.head), | |
227 | .desc = { | |
228 | { | |
229 | .name = "filename", | |
230 | .type = QEMU_OPT_STRING, | |
231 | .help = "File name of the image", | |
232 | }, | |
233 | { /* end of list */ } | |
234 | }, | |
235 | }; | |
236 | ||
56d1b4d2 | 237 | static int raw_open(BlockDriverState *bs, QDict *options, int flags) |
223d4670 TS |
238 | { |
239 | BDRVRawState *s = bs->opaque; | |
9a2d77ad | 240 | int access_flags; |
223d4670 | 241 | DWORD overlapped; |
8a79380b KW |
242 | QemuOpts *opts; |
243 | Error *local_err = NULL; | |
244 | const char *filename; | |
245 | int ret; | |
223d4670 TS |
246 | |
247 | s->type = FTYPE_FILE; | |
248 | ||
8a79380b KW |
249 | opts = qemu_opts_create_nofail(&raw_runtime_opts); |
250 | qemu_opts_absorb_qdict(opts, options, &local_err); | |
251 | if (error_is_set(&local_err)) { | |
252 | qerror_report_err(local_err); | |
253 | error_free(local_err); | |
254 | ret = -EINVAL; | |
255 | goto fail; | |
256 | } | |
257 | ||
258 | filename = qemu_opt_get(opts, "filename"); | |
259 | ||
6a8dc042 | 260 | raw_parse_flags(flags, &access_flags, &overlapped); |
8a79380b | 261 | |
a2736526 PB |
262 | if ((flags & BDRV_O_NATIVE_AIO) && aio == NULL) { |
263 | aio = win32_aio_init(); | |
264 | if (aio == NULL) { | |
8a79380b KW |
265 | ret = -EINVAL; |
266 | goto fail; | |
a2736526 PB |
267 | } |
268 | } | |
9a2d77ad | 269 | |
223d4670 TS |
270 | s->hfile = CreateFile(filename, access_flags, |
271 | FILE_SHARE_READ, NULL, | |
9a2d77ad | 272 | OPEN_EXISTING, overlapped, NULL); |
223d4670 TS |
273 | if (s->hfile == INVALID_HANDLE_VALUE) { |
274 | int err = GetLastError(); | |
275 | ||
8a79380b KW |
276 | if (err == ERROR_ACCESS_DENIED) { |
277 | ret = -EACCES; | |
278 | } else { | |
279 | ret = -EINVAL; | |
280 | } | |
281 | goto fail; | |
a2736526 PB |
282 | } |
283 | ||
284 | if (flags & BDRV_O_NATIVE_AIO) { | |
8a79380b | 285 | ret = win32_aio_attach(aio, s->hfile); |
a2736526 PB |
286 | if (ret < 0) { |
287 | CloseHandle(s->hfile); | |
8a79380b | 288 | goto fail; |
a2736526 PB |
289 | } |
290 | s->aio = aio; | |
223d4670 | 291 | } |
8a79380b KW |
292 | |
293 | ret = 0; | |
294 | fail: | |
295 | qemu_opts_del(opts); | |
296 | return ret; | |
223d4670 TS |
297 | } |
298 | ||
fc4edb84 PB |
299 | static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs, |
300 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
301 | BlockDriverCompletionFunc *cb, void *opaque) | |
223d4670 TS |
302 | { |
303 | BDRVRawState *s = bs->opaque; | |
a2736526 PB |
304 | if (s->aio) { |
305 | return win32_aio_submit(bs, s->aio, s->hfile, sector_num, qiov, | |
306 | nb_sectors, cb, opaque, QEMU_AIO_READ); | |
307 | } else { | |
308 | return paio_submit(bs, s->hfile, sector_num, qiov, nb_sectors, | |
309 | cb, opaque, QEMU_AIO_READ); | |
310 | } | |
223d4670 TS |
311 | } |
312 | ||
fc4edb84 PB |
313 | static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs, |
314 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
315 | BlockDriverCompletionFunc *cb, void *opaque) | |
223d4670 TS |
316 | { |
317 | BDRVRawState *s = bs->opaque; | |
a2736526 PB |
318 | if (s->aio) { |
319 | return win32_aio_submit(bs, s->aio, s->hfile, sector_num, qiov, | |
320 | nb_sectors, cb, opaque, QEMU_AIO_WRITE); | |
321 | } else { | |
322 | return paio_submit(bs, s->hfile, sector_num, qiov, nb_sectors, | |
323 | cb, opaque, QEMU_AIO_WRITE); | |
324 | } | |
223d4670 TS |
325 | } |
326 | ||
fc4edb84 PB |
327 | static BlockDriverAIOCB *raw_aio_flush(BlockDriverState *bs, |
328 | BlockDriverCompletionFunc *cb, void *opaque) | |
223d4670 TS |
329 | { |
330 | BDRVRawState *s = bs->opaque; | |
fc4edb84 | 331 | return paio_submit(bs, s->hfile, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH); |
223d4670 TS |
332 | } |
333 | ||
334 | static void raw_close(BlockDriverState *bs) | |
335 | { | |
336 | BDRVRawState *s = bs->opaque; | |
337 | CloseHandle(s->hfile); | |
338 | } | |
339 | ||
340 | static int raw_truncate(BlockDriverState *bs, int64_t offset) | |
341 | { | |
342 | BDRVRawState *s = bs->opaque; | |
b9e82a59 | 343 | LONG low, high; |
fbcad04d | 344 | DWORD dwPtrLow; |
223d4670 TS |
345 | |
346 | low = offset; | |
347 | high = offset >> 32; | |
fbcad04d FC |
348 | |
349 | /* | |
350 | * An error has occurred if the return value is INVALID_SET_FILE_POINTER | |
351 | * and GetLastError doesn't return NO_ERROR. | |
352 | */ | |
353 | dwPtrLow = SetFilePointer(s->hfile, low, &high, FILE_BEGIN); | |
354 | if (dwPtrLow == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) { | |
fccedc62 | 355 | fprintf(stderr, "SetFilePointer error: %lu\n", GetLastError()); |
fbcad04d FC |
356 | return -EIO; |
357 | } | |
358 | if (SetEndOfFile(s->hfile) == 0) { | |
fccedc62 | 359 | fprintf(stderr, "SetEndOfFile error: %lu\n", GetLastError()); |
223d4670 | 360 | return -EIO; |
fbcad04d | 361 | } |
223d4670 TS |
362 | return 0; |
363 | } | |
364 | ||
365 | static int64_t raw_getlength(BlockDriverState *bs) | |
366 | { | |
367 | BDRVRawState *s = bs->opaque; | |
368 | LARGE_INTEGER l; | |
369 | ULARGE_INTEGER available, total, total_free; | |
370 | DISK_GEOMETRY_EX dg; | |
371 | DWORD count; | |
372 | BOOL status; | |
373 | ||
374 | switch(s->type) { | |
375 | case FTYPE_FILE: | |
b9e82a59 | 376 | l.LowPart = GetFileSize(s->hfile, (PDWORD)&l.HighPart); |
223d4670 TS |
377 | if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR) |
378 | return -EIO; | |
379 | break; | |
380 | case FTYPE_CD: | |
381 | if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free)) | |
382 | return -EIO; | |
383 | l.QuadPart = total.QuadPart; | |
384 | break; | |
385 | case FTYPE_HARDDISK: | |
386 | status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX, | |
387 | NULL, 0, &dg, sizeof(dg), &count, NULL); | |
388 | if (status != 0) { | |
389 | l = dg.DiskSize; | |
390 | } | |
391 | break; | |
392 | default: | |
393 | return -EIO; | |
394 | } | |
395 | return l.QuadPart; | |
396 | } | |
397 | ||
4a1d5e1f FZ |
398 | static int64_t raw_get_allocated_file_size(BlockDriverState *bs) |
399 | { | |
400 | typedef DWORD (WINAPI * get_compressed_t)(const char *filename, | |
401 | DWORD * high); | |
402 | get_compressed_t get_compressed; | |
403 | struct _stati64 st; | |
404 | const char *filename = bs->filename; | |
405 | /* WinNT support GetCompressedFileSize to determine allocate size */ | |
406 | get_compressed = | |
407 | (get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"), | |
408 | "GetCompressedFileSizeA"); | |
409 | if (get_compressed) { | |
410 | DWORD high, low; | |
411 | low = get_compressed(filename, &high); | |
412 | if (low != 0xFFFFFFFFlu || GetLastError() == NO_ERROR) { | |
413 | return (((int64_t) high) << 32) + low; | |
414 | } | |
415 | } | |
416 | ||
417 | if (_stati64(filename, &st) < 0) { | |
418 | return -1; | |
419 | } | |
420 | return st.st_size; | |
421 | } | |
422 | ||
0e7e1989 | 423 | static int raw_create(const char *filename, QEMUOptionParameter *options) |
223d4670 TS |
424 | { |
425 | int fd; | |
0e7e1989 | 426 | int64_t total_size = 0; |
223d4670 | 427 | |
0e7e1989 KW |
428 | /* Read out options */ |
429 | while (options && options->name) { | |
430 | if (!strcmp(options->name, BLOCK_OPT_SIZE)) { | |
431 | total_size = options->value.n / 512; | |
432 | } | |
433 | options++; | |
434 | } | |
223d4670 | 435 | |
6165f4d8 CB |
436 | fd = qemu_open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
437 | 0644); | |
223d4670 TS |
438 | if (fd < 0) |
439 | return -EIO; | |
440 | set_sparse(fd); | |
441 | ftruncate(fd, total_size * 512); | |
2e1e79da | 442 | qemu_close(fd); |
223d4670 TS |
443 | return 0; |
444 | } | |
445 | ||
0e7e1989 | 446 | static QEMUOptionParameter raw_create_options[] = { |
db08adf5 KW |
447 | { |
448 | .name = BLOCK_OPT_SIZE, | |
449 | .type = OPT_SIZE, | |
450 | .help = "Virtual disk size" | |
451 | }, | |
0e7e1989 KW |
452 | { NULL } |
453 | }; | |
454 | ||
84a12e66 CH |
455 | static BlockDriver bdrv_file = { |
456 | .format_name = "file", | |
457 | .protocol_name = "file", | |
f1b2f712 | 458 | .instance_size = sizeof(BDRVRawState), |
66f82cee | 459 | .bdrv_file_open = raw_open, |
f1b2f712 AL |
460 | .bdrv_close = raw_close, |
461 | .bdrv_create = raw_create, | |
c68b89ac | 462 | |
fc4edb84 PB |
463 | .bdrv_aio_readv = raw_aio_readv, |
464 | .bdrv_aio_writev = raw_aio_writev, | |
465 | .bdrv_aio_flush = raw_aio_flush, | |
c68b89ac | 466 | |
f1b2f712 AL |
467 | .bdrv_truncate = raw_truncate, |
468 | .bdrv_getlength = raw_getlength, | |
4a1d5e1f FZ |
469 | .bdrv_get_allocated_file_size |
470 | = raw_get_allocated_file_size, | |
0e7e1989 KW |
471 | |
472 | .create_options = raw_create_options, | |
223d4670 TS |
473 | }; |
474 | ||
475 | /***********************************************/ | |
476 | /* host device */ | |
477 | ||
478 | static int find_cdrom(char *cdrom_name, int cdrom_name_size) | |
479 | { | |
480 | char drives[256], *pdrv = drives; | |
481 | UINT type; | |
482 | ||
483 | memset(drives, 0, sizeof(drives)); | |
484 | GetLogicalDriveStrings(sizeof(drives), drives); | |
485 | while(pdrv[0] != '\0') { | |
486 | type = GetDriveType(pdrv); | |
487 | switch(type) { | |
488 | case DRIVE_CDROM: | |
489 | snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]); | |
490 | return 0; | |
491 | break; | |
492 | } | |
493 | pdrv += lstrlen(pdrv) + 1; | |
494 | } | |
495 | return -1; | |
496 | } | |
497 | ||
498 | static int find_device_type(BlockDriverState *bs, const char *filename) | |
499 | { | |
500 | BDRVRawState *s = bs->opaque; | |
501 | UINT type; | |
502 | const char *p; | |
503 | ||
504 | if (strstart(filename, "\\\\.\\", &p) || | |
505 | strstart(filename, "//./", &p)) { | |
506 | if (stristart(p, "PhysicalDrive", NULL)) | |
507 | return FTYPE_HARDDISK; | |
508 | snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]); | |
509 | type = GetDriveType(s->drive_path); | |
3060cd14 AL |
510 | switch (type) { |
511 | case DRIVE_REMOVABLE: | |
512 | case DRIVE_FIXED: | |
513 | return FTYPE_HARDDISK; | |
514 | case DRIVE_CDROM: | |
223d4670 | 515 | return FTYPE_CD; |
3060cd14 | 516 | default: |
223d4670 | 517 | return FTYPE_FILE; |
3060cd14 | 518 | } |
223d4670 TS |
519 | } else { |
520 | return FTYPE_FILE; | |
521 | } | |
522 | } | |
523 | ||
508c7cb3 CH |
524 | static int hdev_probe_device(const char *filename) |
525 | { | |
526 | if (strstart(filename, "/dev/cdrom", NULL)) | |
527 | return 100; | |
528 | if (is_windows_drive(filename)) | |
529 | return 100; | |
530 | return 0; | |
531 | } | |
532 | ||
56d1b4d2 | 533 | static int hdev_open(BlockDriverState *bs, QDict *options, int flags) |
223d4670 TS |
534 | { |
535 | BDRVRawState *s = bs->opaque; | |
536 | int access_flags, create_flags; | |
537 | DWORD overlapped; | |
538 | char device_name[64]; | |
8a79380b | 539 | const char *filename = qdict_get_str(options, "filename"); |
223d4670 TS |
540 | |
541 | if (strstart(filename, "/dev/cdrom", NULL)) { | |
542 | if (find_cdrom(device_name, sizeof(device_name)) < 0) | |
543 | return -ENOENT; | |
544 | filename = device_name; | |
545 | } else { | |
546 | /* transform drive letters into device name */ | |
547 | if (((filename[0] >= 'a' && filename[0] <= 'z') || | |
548 | (filename[0] >= 'A' && filename[0] <= 'Z')) && | |
549 | filename[1] == ':' && filename[2] == '\0') { | |
550 | snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]); | |
551 | filename = device_name; | |
552 | } | |
553 | } | |
554 | s->type = find_device_type(bs, filename); | |
555 | ||
6a8dc042 JC |
556 | raw_parse_flags(flags, &access_flags, &overlapped); |
557 | ||
223d4670 TS |
558 | create_flags = OPEN_EXISTING; |
559 | ||
223d4670 TS |
560 | s->hfile = CreateFile(filename, access_flags, |
561 | FILE_SHARE_READ, NULL, | |
562 | create_flags, overlapped, NULL); | |
563 | if (s->hfile == INVALID_HANDLE_VALUE) { | |
564 | int err = GetLastError(); | |
565 | ||
566 | if (err == ERROR_ACCESS_DENIED) | |
567 | return -EACCES; | |
568 | return -1; | |
569 | } | |
570 | return 0; | |
571 | } | |
572 | ||
336c1c12 KW |
573 | static int hdev_has_zero_init(BlockDriverState *bs) |
574 | { | |
575 | return 0; | |
576 | } | |
577 | ||
5efa9d5a | 578 | static BlockDriver bdrv_host_device = { |
e60f469c | 579 | .format_name = "host_device", |
84a12e66 | 580 | .protocol_name = "host_device", |
e60f469c | 581 | .instance_size = sizeof(BDRVRawState), |
508c7cb3 | 582 | .bdrv_probe_device = hdev_probe_device, |
66f82cee | 583 | .bdrv_file_open = hdev_open, |
e60f469c | 584 | .bdrv_close = raw_close, |
336c1c12 | 585 | .bdrv_has_zero_init = hdev_has_zero_init, |
223d4670 | 586 | |
fc4edb84 PB |
587 | .bdrv_aio_readv = raw_aio_readv, |
588 | .bdrv_aio_writev = raw_aio_writev, | |
589 | .bdrv_aio_flush = raw_aio_flush, | |
c68b89ac | 590 | |
e60f469c | 591 | .bdrv_getlength = raw_getlength, |
4a1d5e1f FZ |
592 | .bdrv_get_allocated_file_size |
593 | = raw_get_allocated_file_size, | |
223d4670 | 594 | }; |
5efa9d5a | 595 | |
84a12e66 | 596 | static void bdrv_file_init(void) |
5efa9d5a | 597 | { |
84a12e66 | 598 | bdrv_register(&bdrv_file); |
5efa9d5a AL |
599 | bdrv_register(&bdrv_host_device); |
600 | } | |
601 | ||
84a12e66 | 602 | block_init(bdrv_file_init); |