2 * Block driver for RAW files (win32)
4 * Copyright (c) 2006 Fabrice Bellard
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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
24 #include "qemu-common.h"
25 #include "qemu-timer.h"
26 #include "block_int.h"
35 #define FTYPE_HARDDISK 2
37 typedef struct BDRVRawState {
40 char drive_path[16]; /* format: "d:\" */
43 typedef struct RawAIOCB {
44 BlockDriverAIOCB common;
50 int qemu_ftruncate64(int fd, int64_t length)
57 if ((GetVersion() & 0x80000000UL) && (length >> 32) != 0)
60 h = (HANDLE)_get_osfhandle(fd);
62 /* get current position, ftruncate do not change position */
64 li.LowPart = SetFilePointer (h, 0, &li.HighPart, FILE_CURRENT);
65 if (li.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
69 if (!SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN))
71 res = SetEndOfFile(h);
73 /* back to old position */
74 SetFilePointer(h, li.LowPart, &li.HighPart, FILE_BEGIN);
78 static int set_sparse(int fd)
81 return (int) DeviceIoControl((HANDLE)_get_osfhandle(fd), FSCTL_SET_SPARSE,
82 NULL, 0, NULL, 0, &returned, NULL);
85 static int raw_open(BlockDriverState *bs, const char *filename, int flags)
87 BDRVRawState *s = bs->opaque;
88 int access_flags, create_flags;
93 if ((flags & BDRV_O_ACCESS) == O_RDWR) {
94 access_flags = GENERIC_READ | GENERIC_WRITE;
96 access_flags = GENERIC_READ;
98 if (flags & BDRV_O_CREAT) {
99 create_flags = CREATE_ALWAYS;
101 create_flags = OPEN_EXISTING;
104 overlapped = FILE_FLAG_OVERLAPPED;
106 overlapped = FILE_ATTRIBUTE_NORMAL;
108 if ((flags & BDRV_O_NOCACHE))
109 overlapped |= FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH;
110 else if (!(flags & BDRV_O_CACHE_WB))
111 overlapped |= FILE_FLAG_WRITE_THROUGH;
112 s->hfile = CreateFile(filename, access_flags,
113 FILE_SHARE_READ, NULL,
114 create_flags, overlapped, NULL);
115 if (s->hfile == INVALID_HANDLE_VALUE) {
116 int err = GetLastError();
118 if (err == ERROR_ACCESS_DENIED)
125 static int raw_read(BlockDriverState *bs, int64_t sector_num,
126 uint8_t *buf, int nb_sectors)
128 BDRVRawState *s = bs->opaque;
132 int64_t offset = sector_num * 512;
133 int count = nb_sectors * 512;
135 memset(&ov, 0, sizeof(ov));
137 ov.OffsetHigh = offset >> 32;
138 ret = ReadFile(s->hfile, buf, count, &ret_count, &ov);
141 ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
148 if (ret_count == count)
153 static int raw_write(BlockDriverState *bs, int64_t sector_num,
154 const uint8_t *buf, int nb_sectors)
156 BDRVRawState *s = bs->opaque;
160 int64_t offset = sector_num * 512;
161 int count = nb_sectors * 512;
163 memset(&ov, 0, sizeof(ov));
165 ov.OffsetHigh = offset >> 32;
166 ret = WriteFile(s->hfile, buf, count, &ret_count, &ov);
169 ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
176 if (ret_count == count)
182 static void raw_aio_cb(void *opaque)
184 RawAIOCB *acb = opaque;
185 BlockDriverState *bs = acb->common.bs;
186 BDRVRawState *s = bs->opaque;
190 ret = GetOverlappedResult(s->hfile, &acb->ov, &ret_count, TRUE);
191 if (!ret || ret_count != acb->count) {
192 acb->common.cb(acb->common.opaque, -EIO);
194 acb->common.cb(acb->common.opaque, 0);
198 static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
199 int64_t sector_num, uint8_t *buf, int nb_sectors,
200 BlockDriverCompletionFunc *cb, void *opaque)
205 acb = qemu_aio_get(bs, cb, opaque);
207 acb->hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
209 qemu_aio_release(acb);
213 memset(&acb->ov, 0, sizeof(acb->ov));
214 offset = sector_num * 512;
215 acb->ov.Offset = offset;
216 acb->ov.OffsetHigh = offset >> 32;
217 acb->ov.hEvent = acb->hEvent;
218 acb->count = nb_sectors * 512;
219 qemu_add_wait_object(acb->ov.hEvent, raw_aio_cb, acb);
223 static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
224 int64_t sector_num, uint8_t *buf, int nb_sectors,
225 BlockDriverCompletionFunc *cb, void *opaque)
227 BDRVRawState *s = bs->opaque;
231 acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
234 ret = ReadFile(s->hfile, buf, acb->count, NULL, &acb->ov);
236 qemu_aio_release(acb);
239 qemu_aio_release(acb);
240 return (BlockDriverAIOCB *)acb;
243 static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
244 int64_t sector_num, uint8_t *buf, int nb_sectors,
245 BlockDriverCompletionFunc *cb, void *opaque)
247 BDRVRawState *s = bs->opaque;
251 acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
254 ret = WriteFile(s->hfile, buf, acb->count, NULL, &acb->ov);
256 qemu_aio_release(acb);
259 qemu_aio_release(acb);
260 return (BlockDriverAIOCB *)acb;
263 static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
265 RawAIOCB *acb = (RawAIOCB *)blockacb;
266 BlockDriverState *bs = acb->common.bs;
267 BDRVRawState *s = bs->opaque;
269 qemu_del_wait_object(acb->ov.hEvent, raw_aio_cb, acb);
270 /* XXX: if more than one async I/O it is not correct */
272 qemu_aio_release(acb);
274 #endif /* #if WIN32_AIO */
276 static void raw_flush(BlockDriverState *bs)
278 BDRVRawState *s = bs->opaque;
279 FlushFileBuffers(s->hfile);
282 static void raw_close(BlockDriverState *bs)
284 BDRVRawState *s = bs->opaque;
285 CloseHandle(s->hfile);
288 static int raw_truncate(BlockDriverState *bs, int64_t offset)
290 BDRVRawState *s = bs->opaque;
295 if (!SetFilePointer(s->hfile, low, &high, FILE_BEGIN))
297 if (!SetEndOfFile(s->hfile))
302 static int64_t raw_getlength(BlockDriverState *bs)
304 BDRVRawState *s = bs->opaque;
306 ULARGE_INTEGER available, total, total_free;
313 l.LowPart = GetFileSize(s->hfile, &l.HighPart);
314 if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
318 if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free))
320 l.QuadPart = total.QuadPart;
323 status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
324 NULL, 0, &dg, sizeof(dg), &count, NULL);
335 static int raw_create(const char *filename, int64_t total_size,
336 const char *backing_file, int flags)
340 if (flags || backing_file)
343 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
348 ftruncate(fd, total_size * 512);
353 BlockDriver bdrv_raw = {
355 sizeof(BDRVRawState),
356 NULL, /* no probe for protocols */
365 .bdrv_aio_read = raw_aio_read,
366 .bdrv_aio_write = raw_aio_write,
367 .bdrv_aio_cancel = raw_aio_cancel,
368 .aiocb_size = sizeof(RawAIOCB);
370 .bdrv_read = raw_read,
371 .bdrv_write = raw_write,
372 .bdrv_truncate = raw_truncate,
373 .bdrv_getlength = raw_getlength,
376 /***********************************************/
379 static int find_cdrom(char *cdrom_name, int cdrom_name_size)
381 char drives[256], *pdrv = drives;
384 memset(drives, 0, sizeof(drives));
385 GetLogicalDriveStrings(sizeof(drives), drives);
386 while(pdrv[0] != '\0') {
387 type = GetDriveType(pdrv);
390 snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]);
394 pdrv += lstrlen(pdrv) + 1;
399 static int find_device_type(BlockDriverState *bs, const char *filename)
401 BDRVRawState *s = bs->opaque;
405 if (strstart(filename, "\\\\.\\", &p) ||
406 strstart(filename, "//./", &p)) {
407 if (stristart(p, "PhysicalDrive", NULL))
408 return FTYPE_HARDDISK;
409 snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]);
410 type = GetDriveType(s->drive_path);
411 if (type == DRIVE_CDROM)
420 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
422 BDRVRawState *s = bs->opaque;
423 int access_flags, create_flags;
425 char device_name[64];
427 if (strstart(filename, "/dev/cdrom", NULL)) {
428 if (find_cdrom(device_name, sizeof(device_name)) < 0)
430 filename = device_name;
432 /* transform drive letters into device name */
433 if (((filename[0] >= 'a' && filename[0] <= 'z') ||
434 (filename[0] >= 'A' && filename[0] <= 'Z')) &&
435 filename[1] == ':' && filename[2] == '\0') {
436 snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]);
437 filename = device_name;
440 s->type = find_device_type(bs, filename);
442 if ((flags & BDRV_O_ACCESS) == O_RDWR) {
443 access_flags = GENERIC_READ | GENERIC_WRITE;
445 access_flags = GENERIC_READ;
447 create_flags = OPEN_EXISTING;
450 overlapped = FILE_FLAG_OVERLAPPED;
452 overlapped = FILE_ATTRIBUTE_NORMAL;
454 if ((flags & BDRV_O_NOCACHE))
455 overlapped |= FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH;
456 else if (!(flags & BDRV_O_CACHE_WB))
457 overlapped |= FILE_FLAG_WRITE_THROUGH;
458 s->hfile = CreateFile(filename, access_flags,
459 FILE_SHARE_READ, NULL,
460 create_flags, overlapped, NULL);
461 if (s->hfile == INVALID_HANDLE_VALUE) {
462 int err = GetLastError();
464 if (err == ERROR_ACCESS_DENIED)
472 /***********************************************/
473 /* removable device additional commands */
475 static int raw_is_inserted(BlockDriverState *bs)
480 static int raw_media_changed(BlockDriverState *bs)
485 static int raw_eject(BlockDriverState *bs, int eject_flag)
489 if (s->type == FTYPE_FILE)
492 DeviceIoControl(s->hfile, IOCTL_STORAGE_EJECT_MEDIA,
493 NULL, 0, NULL, 0, &lpBytesReturned, NULL);
495 DeviceIoControl(s->hfile, IOCTL_STORAGE_LOAD_MEDIA,
496 NULL, 0, NULL, 0, &lpBytesReturned, NULL);
500 static int raw_set_locked(BlockDriverState *bs, int locked)
506 BlockDriver bdrv_host_device = {
507 .format_name = "host_device",
508 .instance_size = sizeof(BDRVRawState),
509 .bdrv_open = hdev_open,
510 .bdrv_close = raw_close,
511 .bdrv_flush = raw_flush,
514 .bdrv_aio_read = raw_aio_read,
515 .bdrv_aio_write = raw_aio_write,
516 .bdrv_aio_cancel = raw_aio_cancel,
517 .aiocb_size = sizeof(RawAIOCB);
519 .bdrv_read = raw_read,
520 .bdrv_write = raw_write,
521 .bdrv_getlength = raw_getlength,