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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 | */ | |
922a01a0 | 24 | |
80c71a24 | 25 | #include "qemu/osdep.h" |
da34e65c | 26 | #include "qapi/error.h" |
f348b6d1 | 27 | #include "qemu/cutils.h" |
737e150e | 28 | #include "block/block_int.h" |
1de7afc9 | 29 | #include "qemu/module.h" |
922a01a0 | 30 | #include "qemu/option.h" |
0187f5c9 | 31 | #include "block/raw-aio.h" |
fc4edb84 | 32 | #include "trace.h" |
737e150e | 33 | #include "block/thread-pool.h" |
1de7afc9 | 34 | #include "qemu/iov.h" |
452fcdbc | 35 | #include "qapi/qmp/qdict.h" |
d49b6836 | 36 | #include "qapi/qmp/qstring.h" |
49dc768d | 37 | #include <windows.h> |
223d4670 TS |
38 | #include <winioctl.h> |
39 | ||
40 | #define FTYPE_FILE 0 | |
41 | #define FTYPE_CD 1 | |
42 | #define FTYPE_HARDDISK 2 | |
43 | ||
fc4edb84 PB |
44 | typedef 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 | ||
223d4670 TS |
54 | typedef struct BDRVRawState { |
55 | HANDLE hfile; | |
56 | int type; | |
57 | char drive_path[16]; /* format: "d:\" */ | |
a2736526 | 58 | QEMUWin32AIOState *aio; |
223d4670 TS |
59 | } BDRVRawState; |
60 | ||
fc4edb84 PB |
61 | /* |
62 | * Read/writes the data to/from a given linear buffer. | |
63 | * | |
64 | * Returns the number of bytes handles or -errno in case of an error. Short | |
65 | * reads are only returned if the end of the file is reached. | |
66 | */ | |
67 | static 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) { | |
56e023af | 91 | offset += ret_count; |
fc4edb84 PB |
92 | break; |
93 | } | |
94 | offset += len; | |
95 | } | |
96 | ||
97 | return offset; | |
98 | } | |
99 | ||
100 | static 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); | |
c0191e76 | 109 | if (count < aiocb->aio_nbytes) { |
fc4edb84 PB |
110 | /* A short read means that we have reached EOF. Pad the buffer |
111 | * with zeros for bytes after EOF. */ | |
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) { | |
5d555030 | 126 | ret = 0; |
fc4edb84 | 127 | } else { |
5d555030 | 128 | ret = -EINVAL; |
fc4edb84 PB |
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 | ||
c84b3192 | 142 | g_free(aiocb); |
fc4edb84 PB |
143 | return ret; |
144 | } | |
145 | ||
7c84b1b8 | 146 | static BlockAIOCB *paio_submit(BlockDriverState *bs, HANDLE hfile, |
36e3b2e7 | 147 | int64_t offset, QEMUIOVector *qiov, int count, |
097310b5 | 148 | BlockCompletionFunc *cb, void *opaque, int type) |
fc4edb84 | 149 | { |
c84b3192 | 150 | RawWin32AIOData *acb = g_new(RawWin32AIOData, 1); |
c4d9d196 | 151 | ThreadPool *pool; |
fc4edb84 PB |
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; | |
36e3b2e7 | 160 | assert(qiov->size == count); |
fc4edb84 | 161 | } |
36e3b2e7 EB |
162 | acb->aio_nbytes = count; |
163 | acb->aio_offset = offset; | |
fc4edb84 | 164 | |
f8a30874 | 165 | trace_file_paio_submit(acb, opaque, offset, count, type); |
c4d9d196 SH |
166 | pool = aio_get_thread_pool(bdrv_get_aio_context(bs)); |
167 | return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque); | |
fc4edb84 PB |
168 | } |
169 | ||
223d4670 TS |
170 | int qemu_ftruncate64(int fd, int64_t length) |
171 | { | |
172 | LARGE_INTEGER li; | |
2c993ec2 | 173 | DWORD dw; |
223d4670 TS |
174 | LONG high; |
175 | HANDLE h; | |
176 | BOOL res; | |
177 | ||
178 | if ((GetVersion() & 0x80000000UL) && (length >> 32) != 0) | |
7d37435b | 179 | return -1; |
223d4670 TS |
180 | |
181 | h = (HANDLE)_get_osfhandle(fd); | |
182 | ||
183 | /* get current position, ftruncate do not change position */ | |
184 | li.HighPart = 0; | |
185 | li.LowPart = SetFilePointer (h, 0, &li.HighPart, FILE_CURRENT); | |
2c993ec2 | 186 | if (li.LowPart == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) { |
7d37435b | 187 | return -1; |
2c993ec2 | 188 | } |
223d4670 TS |
189 | |
190 | high = length >> 32; | |
2c993ec2 SW |
191 | dw = SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN); |
192 | if (dw == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) { | |
7d37435b | 193 | return -1; |
2c993ec2 | 194 | } |
223d4670 TS |
195 | res = SetEndOfFile(h); |
196 | ||
197 | /* back to old position */ | |
198 | SetFilePointer(h, li.LowPart, &li.HighPart, FILE_BEGIN); | |
199 | return res ? 0 : -1; | |
200 | } | |
201 | ||
202 | static int set_sparse(int fd) | |
203 | { | |
204 | DWORD returned; | |
205 | return (int) DeviceIoControl((HANDLE)_get_osfhandle(fd), FSCTL_SET_SPARSE, | |
7d37435b | 206 | NULL, 0, NULL, 0, &returned, NULL); |
223d4670 TS |
207 | } |
208 | ||
85ebd381 SH |
209 | static 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 | ||
218 | static 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 | ||
2914a1de | 228 | static void raw_probe_alignment(BlockDriverState *bs, Error **errp) |
c25f53b0 PB |
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) { | |
a5b8dd2c | 236 | bs->bl.request_alignment = 2048; |
c25f53b0 PB |
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) { | |
a5b8dd2c | 243 | bs->bl.request_alignment = dg.Geometry.BytesPerSector; |
c25f53b0 PB |
244 | return; |
245 | } | |
246 | /* try GetDiskFreeSpace too */ | |
247 | } | |
248 | ||
249 | if (s->drive_path[0]) { | |
250 | GetDiskFreeSpace(s->drive_path, §orsPerCluster, | |
251 | &dg.Geometry.BytesPerSector, | |
252 | &freeClusters, &totalClusters); | |
a5b8dd2c | 253 | bs->bl.request_alignment = dg.Geometry.BytesPerSector; |
de7056a3 | 254 | return; |
c25f53b0 | 255 | } |
de7056a3 EB |
256 | |
257 | /* XXX Does Windows support AIO on less than 512-byte alignment? */ | |
258 | bs->bl.request_alignment = 512; | |
c25f53b0 PB |
259 | } |
260 | ||
0a4279d9 KW |
261 | static void raw_parse_flags(int flags, bool use_aio, int *access_flags, |
262 | DWORD *overlapped) | |
6a8dc042 JC |
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; | |
0a4279d9 | 274 | if (use_aio) { |
a2736526 PB |
275 | *overlapped |= FILE_FLAG_OVERLAPPED; |
276 | } | |
6a8dc042 JC |
277 | if (flags & BDRV_O_NOCACHE) { |
278 | *overlapped |= FILE_FLAG_NO_BUFFERING; | |
279 | } | |
6a8dc042 JC |
280 | } |
281 | ||
7dc74db8 HR |
282 | static void raw_parse_filename(const char *filename, QDict *options, |
283 | Error **errp) | |
284 | { | |
03c320d8 | 285 | bdrv_parse_filename_strip_prefix(filename, "file:", options); |
7dc74db8 HR |
286 | } |
287 | ||
8a79380b KW |
288 | static 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 | }, | |
0a4279d9 KW |
297 | { |
298 | .name = "aio", | |
299 | .type = QEMU_OPT_STRING, | |
300 | .help = "host AIO implementation (threads, native)", | |
301 | }, | |
3b079ac0 KW |
302 | { |
303 | .name = "locking", | |
304 | .type = QEMU_OPT_STRING, | |
305 | .help = "file locking mode (on/off/auto, default: auto)", | |
306 | }, | |
8a79380b KW |
307 | { /* end of list */ } |
308 | }, | |
309 | }; | |
310 | ||
0a4279d9 KW |
311 | static 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; | |
f7abe0ec | 317 | aio = qapi_enum_parse(&BlockdevAioOptions_lookup, qemu_opt_get(opts, "aio"), |
06c60b6c | 318 | aio_default, errp); |
0a4279d9 KW |
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 | ||
015a1036 HR |
331 | static int raw_open(BlockDriverState *bs, QDict *options, int flags, |
332 | Error **errp) | |
223d4670 TS |
333 | { |
334 | BDRVRawState *s = bs->opaque; | |
9a2d77ad | 335 | int access_flags; |
223d4670 | 336 | DWORD overlapped; |
8a79380b KW |
337 | QemuOpts *opts; |
338 | Error *local_err = NULL; | |
339 | const char *filename; | |
0a4279d9 | 340 | bool use_aio; |
3b079ac0 | 341 | OnOffAuto locking; |
8a79380b | 342 | int ret; |
223d4670 TS |
343 | |
344 | s->type = FTYPE_FILE; | |
345 | ||
87ea75d5 | 346 | opts = qemu_opts_create(&raw_runtime_opts, NULL, 0, &error_abort); |
af175e85 | 347 | if (!qemu_opts_absorb_qdict(opts, options, errp)) { |
8a79380b KW |
348 | ret = -EINVAL; |
349 | goto fail; | |
350 | } | |
351 | ||
3b079ac0 KW |
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: | |
1c3a555c | 362 | error_setg(errp, "locking=on is not supported on Windows"); |
cdece046 | 363 | ret = -EINVAL; |
1c3a555c | 364 | goto fail; |
3b079ac0 KW |
365 | case ON_OFF_AUTO_OFF: |
366 | case ON_OFF_AUTO_AUTO: | |
367 | break; | |
368 | default: | |
369 | g_assert_not_reached(); | |
1c3a555c FZ |
370 | } |
371 | ||
8a79380b KW |
372 | filename = qemu_opt_get(opts, "filename"); |
373 | ||
0a4279d9 KW |
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); | |
8a79380b | 382 | |
c25f53b0 PB |
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 | /* Relative path. */ | |
389 | char buf[MAX_PATH]; | |
390 | GetCurrentDirectory(MAX_PATH, buf); | |
391 | snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", buf[0]); | |
392 | } | |
393 | ||
223d4670 TS |
394 | s->hfile = CreateFile(filename, access_flags, |
395 | FILE_SHARE_READ, NULL, | |
9a2d77ad | 396 | OPEN_EXISTING, overlapped, NULL); |
223d4670 TS |
397 | if (s->hfile == INVALID_HANDLE_VALUE) { |
398 | int err = GetLastError(); | |
399 | ||
09237757 | 400 | error_setg_win32(errp, err, "Could not open '%s'", filename); |
8a79380b KW |
401 | if (err == ERROR_ACCESS_DENIED) { |
402 | ret = -EACCES; | |
403 | } else { | |
404 | ret = -EINVAL; | |
405 | } | |
406 | goto fail; | |
a2736526 PB |
407 | } |
408 | ||
0a4279d9 | 409 | if (use_aio) { |
99cc5989 SH |
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); | |
a2736526 | 419 | if (ret < 0) { |
99cc5989 | 420 | win32_aio_cleanup(s->aio); |
a2736526 | 421 | CloseHandle(s->hfile); |
c6252b7c | 422 | error_setg_errno(errp, -ret, "Could not enable AIO"); |
8a79380b | 423 | goto fail; |
a2736526 | 424 | } |
85ebd381 SH |
425 | |
426 | win32_aio_attach_aio_context(s->aio, bdrv_get_aio_context(bs)); | |
223d4670 | 427 | } |
8a79380b | 428 | |
8e519795 EB |
429 | /* When extending regular files, we get zeros from the OS */ |
430 | bs->supported_truncate_flags = BDRV_REQ_ZERO_WRITE; | |
431 | ||
8a79380b KW |
432 | ret = 0; |
433 | fail: | |
434 | qemu_opts_del(opts); | |
435 | return ret; | |
223d4670 TS |
436 | } |
437 | ||
de7056a3 EB |
438 | static BlockAIOCB *raw_aio_preadv(BlockDriverState *bs, |
439 | uint64_t offset, uint64_t bytes, | |
440 | QEMUIOVector *qiov, int flags, | |
441 | BlockCompletionFunc *cb, void *opaque) | |
223d4670 TS |
442 | { |
443 | BDRVRawState *s = bs->opaque; | |
a2736526 | 444 | if (s->aio) { |
de7056a3 EB |
445 | return win32_aio_submit(bs, s->aio, s->hfile, offset, bytes, qiov, |
446 | cb, opaque, QEMU_AIO_READ); | |
a2736526 | 447 | } else { |
de7056a3 | 448 | return paio_submit(bs, s->hfile, offset, qiov, bytes, |
a2736526 PB |
449 | cb, opaque, QEMU_AIO_READ); |
450 | } | |
223d4670 TS |
451 | } |
452 | ||
de7056a3 EB |
453 | static BlockAIOCB *raw_aio_pwritev(BlockDriverState *bs, |
454 | uint64_t offset, uint64_t bytes, | |
455 | QEMUIOVector *qiov, int flags, | |
456 | BlockCompletionFunc *cb, void *opaque) | |
223d4670 TS |
457 | { |
458 | BDRVRawState *s = bs->opaque; | |
a2736526 | 459 | if (s->aio) { |
de7056a3 EB |
460 | return win32_aio_submit(bs, s->aio, s->hfile, offset, bytes, qiov, |
461 | cb, opaque, QEMU_AIO_WRITE); | |
a2736526 | 462 | } else { |
de7056a3 | 463 | return paio_submit(bs, s->hfile, offset, qiov, bytes, |
a2736526 PB |
464 | cb, opaque, QEMU_AIO_WRITE); |
465 | } | |
223d4670 TS |
466 | } |
467 | ||
7c84b1b8 | 468 | static BlockAIOCB *raw_aio_flush(BlockDriverState *bs, |
097310b5 | 469 | BlockCompletionFunc *cb, void *opaque) |
223d4670 TS |
470 | { |
471 | BDRVRawState *s = bs->opaque; | |
fc4edb84 | 472 | return paio_submit(bs, s->hfile, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH); |
223d4670 TS |
473 | } |
474 | ||
475 | static void raw_close(BlockDriverState *bs) | |
476 | { | |
477 | BDRVRawState *s = bs->opaque; | |
99cc5989 SH |
478 | |
479 | if (s->aio) { | |
85ebd381 | 480 | win32_aio_detach_aio_context(s->aio, bdrv_get_aio_context(bs)); |
99cc5989 SH |
481 | win32_aio_cleanup(s->aio); |
482 | s->aio = NULL; | |
483 | } | |
484 | ||
223d4670 | 485 | CloseHandle(s->hfile); |
8bfea15d KW |
486 | if (bs->open_flags & BDRV_O_TEMPORARY) { |
487 | unlink(bs->filename); | |
488 | } | |
223d4670 TS |
489 | } |
490 | ||
061ca8a3 | 491 | static int coroutine_fn raw_co_truncate(BlockDriverState *bs, int64_t offset, |
c80d8b06 | 492 | bool exact, PreallocMode prealloc, |
92b92799 | 493 | BdrvRequestFlags flags, Error **errp) |
223d4670 TS |
494 | { |
495 | BDRVRawState *s = bs->opaque; | |
b9e82a59 | 496 | LONG low, high; |
fbcad04d | 497 | DWORD dwPtrLow; |
223d4670 | 498 | |
8243ccb7 HR |
499 | if (prealloc != PREALLOC_MODE_OFF) { |
500 | error_setg(errp, "Unsupported preallocation mode '%s'", | |
977c736f | 501 | PreallocMode_str(prealloc)); |
8243ccb7 HR |
502 | return -ENOTSUP; |
503 | } | |
504 | ||
223d4670 TS |
505 | low = offset; |
506 | high = offset >> 32; | |
fbcad04d FC |
507 | |
508 | /* | |
509 | * An error has occurred if the return value is INVALID_SET_FILE_POINTER | |
510 | * and GetLastError doesn't return NO_ERROR. | |
511 | */ | |
512 | dwPtrLow = SetFilePointer(s->hfile, low, &high, FILE_BEGIN); | |
513 | if (dwPtrLow == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) { | |
4bff28b8 | 514 | error_setg_win32(errp, GetLastError(), "SetFilePointer error"); |
fbcad04d FC |
515 | return -EIO; |
516 | } | |
517 | if (SetEndOfFile(s->hfile) == 0) { | |
4bff28b8 | 518 | error_setg_win32(errp, GetLastError(), "SetEndOfFile error"); |
223d4670 | 519 | return -EIO; |
fbcad04d | 520 | } |
223d4670 TS |
521 | return 0; |
522 | } | |
523 | ||
524 | static 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: | |
b9e82a59 | 535 | l.LowPart = GetFileSize(s->hfile, (PDWORD)&l.HighPart); |
223d4670 TS |
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 | ||
4a1d5e1f FZ |
557 | static 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 | /* WinNT support GetCompressedFileSize to determine allocate size */ | |
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 | ||
3766ef57 | 582 | static int raw_co_create(BlockdevCreateOptions *options, Error **errp) |
223d4670 | 583 | { |
3766ef57 | 584 | BlockdevCreateOptionsFile *file_opts; |
223d4670 TS |
585 | int fd; |
586 | ||
3766ef57 KW |
587 | assert(options->driver == BLOCKDEV_DRIVER_FILE); |
588 | file_opts = &options->u.file; | |
d5546c5e | 589 | |
3766ef57 KW |
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 | } | |
223d4670 | 598 | |
b18a24a9 DB |
599 | fd = qemu_create(file_opts->filename, O_WRONLY | O_TRUNC | O_BINARY, |
600 | 0644, errp); | |
c6252b7c | 601 | if (fd < 0) { |
223d4670 | 602 | return -EIO; |
c6252b7c | 603 | } |
223d4670 | 604 | set_sparse(fd); |
3766ef57 | 605 | ftruncate(fd, file_opts->size); |
2e1e79da | 606 | qemu_close(fd); |
3766ef57 | 607 | |
223d4670 TS |
608 | return 0; |
609 | } | |
610 | ||
b92902df ML |
611 | static int coroutine_fn raw_co_create_opts(BlockDriver *drv, |
612 | const char *filename, | |
613 | QemuOpts *opts, | |
3766ef57 KW |
614 | Error **errp) |
615 | { | |
616 | BlockdevCreateOptions options; | |
617 | int64_t total_size = 0; | |
618 | ||
619 | strstart(filename, "file:", &filename); | |
620 | ||
621 | /* Read out options */ | |
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 | } | |
ddef7699 CL |
636 | |
637 | static 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 | { /* end of list */ } | |
647 | } | |
0e7e1989 KW |
648 | }; |
649 | ||
5f535a94 | 650 | BlockDriver bdrv_file = { |
84a12e66 CH |
651 | .format_name = "file", |
652 | .protocol_name = "file", | |
f1b2f712 | 653 | .instance_size = sizeof(BDRVRawState), |
030be321 | 654 | .bdrv_needs_filename = true, |
7dc74db8 | 655 | .bdrv_parse_filename = raw_parse_filename, |
ddef7699 | 656 | .bdrv_file_open = raw_open, |
2914a1de | 657 | .bdrv_refresh_limits = raw_probe_alignment, |
ddef7699 | 658 | .bdrv_close = raw_close, |
efc75e2a | 659 | .bdrv_co_create_opts = raw_co_create_opts, |
3ac21627 | 660 | .bdrv_has_zero_init = bdrv_has_zero_init_1, |
c68b89ac | 661 | |
de7056a3 EB |
662 | .bdrv_aio_preadv = raw_aio_preadv, |
663 | .bdrv_aio_pwritev = raw_aio_pwritev, | |
fc4edb84 | 664 | .bdrv_aio_flush = raw_aio_flush, |
c68b89ac | 665 | |
061ca8a3 | 666 | .bdrv_co_truncate = raw_co_truncate, |
f1b2f712 | 667 | .bdrv_getlength = raw_getlength, |
4a1d5e1f FZ |
668 | .bdrv_get_allocated_file_size |
669 | = raw_get_allocated_file_size, | |
0e7e1989 | 670 | |
ddef7699 | 671 | .create_opts = &raw_create_opts, |
223d4670 TS |
672 | }; |
673 | ||
674 | /***********************************************/ | |
675 | /* host device */ | |
676 | ||
677 | static 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 | ||
697 | static 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); | |
3060cd14 AL |
709 | switch (type) { |
710 | case DRIVE_REMOVABLE: | |
711 | case DRIVE_FIXED: | |
712 | return FTYPE_HARDDISK; | |
713 | case DRIVE_CDROM: | |
223d4670 | 714 | return FTYPE_CD; |
3060cd14 | 715 | default: |
223d4670 | 716 | return FTYPE_FILE; |
3060cd14 | 717 | } |
223d4670 TS |
718 | } else { |
719 | return FTYPE_FILE; | |
720 | } | |
721 | } | |
722 | ||
508c7cb3 CH |
723 | static 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 | ||
57ed25b1 HR |
732 | static void hdev_parse_filename(const char *filename, QDict *options, |
733 | Error **errp) | |
734 | { | |
03c320d8 | 735 | bdrv_parse_filename_strip_prefix(filename, "host_device:", options); |
57ed25b1 HR |
736 | } |
737 | ||
de7056a3 EB |
738 | static void hdev_refresh_limits(BlockDriverState *bs, Error **errp) |
739 | { | |
740 | /* XXX Does Windows support AIO on less than 512-byte alignment? */ | |
741 | bs->bl.request_alignment = 512; | |
742 | } | |
743 | ||
015a1036 HR |
744 | static int hdev_open(BlockDriverState *bs, QDict *options, int flags, |
745 | Error **errp) | |
223d4670 TS |
746 | { |
747 | BDRVRawState *s = bs->opaque; | |
748 | int access_flags, create_flags; | |
68dc0364 | 749 | int ret = 0; |
223d4670 TS |
750 | DWORD overlapped; |
751 | char device_name[64]; | |
68dc0364 SW |
752 | |
753 | Error *local_err = NULL; | |
754 | const char *filename; | |
0a4279d9 | 755 | bool use_aio; |
68dc0364 | 756 | |
87ea75d5 PC |
757 | QemuOpts *opts = qemu_opts_create(&raw_runtime_opts, NULL, 0, |
758 | &error_abort); | |
af175e85 | 759 | if (!qemu_opts_absorb_qdict(opts, options, errp)) { |
68dc0364 SW |
760 | ret = -EINVAL; |
761 | goto done; | |
762 | } | |
763 | ||
764 | filename = qemu_opt_get(opts, "filename"); | |
223d4670 | 765 | |
0a4279d9 KW |
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 | ||
223d4670 | 776 | if (strstart(filename, "/dev/cdrom", NULL)) { |
68dc0364 | 777 | if (find_cdrom(device_name, sizeof(device_name)) < 0) { |
c6252b7c | 778 | error_setg(errp, "Could not open CD-ROM drive"); |
68dc0364 SW |
779 | ret = -ENOENT; |
780 | goto done; | |
781 | } | |
223d4670 TS |
782 | filename = device_name; |
783 | } else { | |
784 | /* transform drive letters into device name */ | |
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 | ||
0a4279d9 | 794 | raw_parse_flags(flags, use_aio, &access_flags, &overlapped); |
6a8dc042 | 795 | |
223d4670 TS |
796 | create_flags = OPEN_EXISTING; |
797 | ||
223d4670 TS |
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 | ||
68dc0364 SW |
804 | if (err == ERROR_ACCESS_DENIED) { |
805 | ret = -EACCES; | |
806 | } else { | |
45d57f6e | 807 | ret = -EINVAL; |
68dc0364 | 808 | } |
45d57f6e | 809 | error_setg_errno(errp, -ret, "Could not open device"); |
68dc0364 | 810 | goto done; |
223d4670 | 811 | } |
68dc0364 SW |
812 | |
813 | done: | |
814 | qemu_opts_del(opts); | |
815 | return ret; | |
223d4670 TS |
816 | } |
817 | ||
5efa9d5a | 818 | static BlockDriver bdrv_host_device = { |
e60f469c | 819 | .format_name = "host_device", |
84a12e66 | 820 | .protocol_name = "host_device", |
e60f469c | 821 | .instance_size = sizeof(BDRVRawState), |
030be321 | 822 | .bdrv_needs_filename = true, |
57ed25b1 | 823 | .bdrv_parse_filename = hdev_parse_filename, |
508c7cb3 | 824 | .bdrv_probe_device = hdev_probe_device, |
66f82cee | 825 | .bdrv_file_open = hdev_open, |
e60f469c | 826 | .bdrv_close = raw_close, |
de7056a3 | 827 | .bdrv_refresh_limits = hdev_refresh_limits, |
223d4670 | 828 | |
de7056a3 EB |
829 | .bdrv_aio_preadv = raw_aio_preadv, |
830 | .bdrv_aio_pwritev = raw_aio_pwritev, | |
fc4edb84 | 831 | .bdrv_aio_flush = raw_aio_flush, |
c68b89ac | 832 | |
85ebd381 SH |
833 | .bdrv_detach_aio_context = raw_detach_aio_context, |
834 | .bdrv_attach_aio_context = raw_attach_aio_context, | |
835 | ||
b94a2610 KW |
836 | .bdrv_getlength = raw_getlength, |
837 | .has_variable_length = true, | |
838 | ||
4a1d5e1f FZ |
839 | .bdrv_get_allocated_file_size |
840 | = raw_get_allocated_file_size, | |
223d4670 | 841 | }; |
5efa9d5a | 842 | |
84a12e66 | 843 | static void bdrv_file_init(void) |
5efa9d5a | 844 | { |
84a12e66 | 845 | bdrv_register(&bdrv_file); |
5efa9d5a AL |
846 | bdrv_register(&bdrv_host_device); |
847 | } | |
848 | ||
84a12e66 | 849 | block_init(bdrv_file_init); |