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"
26 #include "qemu-timer.h"
29 #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_ATTRIBUTE_NORMAL;
106 overlapped = FILE_FLAG_OVERLAPPED;
108 s->hfile = CreateFile(filename, access_flags,
109 FILE_SHARE_READ, NULL,
110 create_flags, overlapped, NULL);
111 if (s->hfile == INVALID_HANDLE_VALUE) {
112 int err = GetLastError();
114 if (err == ERROR_ACCESS_DENIED)
121 static int raw_pread(BlockDriverState *bs, int64_t offset,
122 uint8_t *buf, int count)
124 BDRVRawState *s = bs->opaque;
129 memset(&ov, 0, sizeof(ov));
131 ov.OffsetHigh = offset >> 32;
132 ret = ReadFile(s->hfile, buf, count, &ret_count, &ov);
134 ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
143 static int raw_pwrite(BlockDriverState *bs, int64_t offset,
144 const uint8_t *buf, int count)
146 BDRVRawState *s = bs->opaque;
151 memset(&ov, 0, sizeof(ov));
153 ov.OffsetHigh = offset >> 32;
154 ret = WriteFile(s->hfile, buf, count, &ret_count, &ov);
156 ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
167 static void raw_aio_cb(void *opaque)
169 RawAIOCB *acb = opaque;
170 BlockDriverState *bs = acb->common.bs;
171 BDRVRawState *s = bs->opaque;
175 ret = GetOverlappedResult(s->hfile, &acb->ov, &ret_count, TRUE);
176 if (!ret || ret_count != acb->count) {
177 acb->common.cb(acb->common.opaque, -EIO);
179 acb->common.cb(acb->common.opaque, 0);
184 static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
185 int64_t sector_num, uint8_t *buf, int nb_sectors,
186 BlockDriverCompletionFunc *cb, void *opaque)
191 acb = qemu_aio_get(bs, cb, opaque);
193 acb->hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
195 qemu_aio_release(acb);
199 memset(&acb->ov, 0, sizeof(acb->ov));
200 offset = sector_num * 512;
201 acb->ov.Offset = offset;
202 acb->ov.OffsetHigh = offset >> 32;
203 acb->ov.hEvent = acb->hEvent;
204 acb->count = nb_sectors * 512;
206 qemu_add_wait_object(acb->ov.hEvent, raw_aio_cb, acb);
211 static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
212 int64_t sector_num, uint8_t *buf, int nb_sectors,
213 BlockDriverCompletionFunc *cb, void *opaque)
215 BDRVRawState *s = bs->opaque;
219 acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
222 ret = ReadFile(s->hfile, buf, acb->count, NULL, &acb->ov);
224 qemu_aio_release(acb);
228 qemu_aio_release(acb);
230 return (BlockDriverAIOCB *)acb;
233 static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
234 int64_t sector_num, uint8_t *buf, int nb_sectors,
235 BlockDriverCompletionFunc *cb, void *opaque)
237 BDRVRawState *s = bs->opaque;
241 acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
244 ret = WriteFile(s->hfile, buf, acb->count, NULL, &acb->ov);
246 qemu_aio_release(acb);
250 qemu_aio_release(acb);
252 return (BlockDriverAIOCB *)acb;
255 static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
258 RawAIOCB *acb = (RawAIOCB *)blockacb;
259 BlockDriverState *bs = acb->common.bs;
260 BDRVRawState *s = bs->opaque;
262 qemu_del_wait_object(acb->ov.hEvent, raw_aio_cb, acb);
263 /* XXX: if more than one async I/O it is not correct */
265 qemu_aio_release(acb);
270 static void raw_flush(BlockDriverState *bs)
272 BDRVRawState *s = bs->opaque;
273 FlushFileBuffers(s->hfile);
276 static void raw_close(BlockDriverState *bs)
278 BDRVRawState *s = bs->opaque;
279 CloseHandle(s->hfile);
282 static int raw_truncate(BlockDriverState *bs, int64_t offset)
284 BDRVRawState *s = bs->opaque;
289 if (!SetFilePointer(s->hfile, low, &high, FILE_BEGIN))
291 if (!SetEndOfFile(s->hfile))
296 static int64_t raw_getlength(BlockDriverState *bs)
298 BDRVRawState *s = bs->opaque;
300 ULARGE_INTEGER available, total, total_free;
307 l.LowPart = GetFileSize(s->hfile, &l.HighPart);
308 if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
312 if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free))
314 l.QuadPart = total.QuadPart;
317 status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
318 NULL, 0, &dg, sizeof(dg), &count, NULL);
329 static int raw_create(const char *filename, int64_t total_size,
330 const char *backing_file, int flags)
334 if (flags || backing_file)
337 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
342 ftruncate(fd, total_size * 512);
347 void qemu_aio_init(void)
351 void qemu_aio_poll(void)
355 void qemu_aio_flush(void)
359 void qemu_aio_wait_start(void)
363 void qemu_aio_wait(void)
370 void qemu_aio_wait_end(void)
374 BlockDriver bdrv_raw = {
376 sizeof(BDRVRawState),
377 NULL, /* no probe for protocols */
386 .bdrv_aio_read = raw_aio_read,
387 .bdrv_aio_write = raw_aio_write,
388 .bdrv_aio_cancel = raw_aio_cancel,
389 .aiocb_size = sizeof(RawAIOCB);
391 .protocol_name = "file",
392 .bdrv_pread = raw_pread,
393 .bdrv_pwrite = raw_pwrite,
394 .bdrv_truncate = raw_truncate,
395 .bdrv_getlength = raw_getlength,
398 /***********************************************/
401 static int find_cdrom(char *cdrom_name, int cdrom_name_size)
403 char drives[256], *pdrv = drives;
406 memset(drives, 0, sizeof(drives));
407 GetLogicalDriveStrings(sizeof(drives), drives);
408 while(pdrv[0] != '\0') {
409 type = GetDriveType(pdrv);
412 snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]);
416 pdrv += lstrlen(pdrv) + 1;
421 static int find_device_type(BlockDriverState *bs, const char *filename)
423 BDRVRawState *s = bs->opaque;
427 if (strstart(filename, "\\\\.\\", &p) ||
428 strstart(filename, "//./", &p)) {
429 if (stristart(p, "PhysicalDrive", NULL))
430 return FTYPE_HARDDISK;
431 snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]);
432 type = GetDriveType(s->drive_path);
433 if (type == DRIVE_CDROM)
442 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
444 BDRVRawState *s = bs->opaque;
445 int access_flags, create_flags;
447 char device_name[64];
449 if (strstart(filename, "/dev/cdrom", NULL)) {
450 if (find_cdrom(device_name, sizeof(device_name)) < 0)
452 filename = device_name;
454 /* transform drive letters into device name */
455 if (((filename[0] >= 'a' && filename[0] <= 'z') ||
456 (filename[0] >= 'A' && filename[0] <= 'Z')) &&
457 filename[1] == ':' && filename[2] == '\0') {
458 snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]);
459 filename = device_name;
462 s->type = find_device_type(bs, filename);
464 if ((flags & BDRV_O_ACCESS) == O_RDWR) {
465 access_flags = GENERIC_READ | GENERIC_WRITE;
467 access_flags = GENERIC_READ;
469 create_flags = OPEN_EXISTING;
472 overlapped = FILE_ATTRIBUTE_NORMAL;
474 overlapped = FILE_FLAG_OVERLAPPED;
476 s->hfile = CreateFile(filename, access_flags,
477 FILE_SHARE_READ, NULL,
478 create_flags, overlapped, NULL);
479 if (s->hfile == INVALID_HANDLE_VALUE) {
480 int err = GetLastError();
482 if (err == ERROR_ACCESS_DENIED)
490 /***********************************************/
491 /* removable device additional commands */
493 static int raw_is_inserted(BlockDriverState *bs)
498 static int raw_media_changed(BlockDriverState *bs)
503 static int raw_eject(BlockDriverState *bs, int eject_flag)
507 if (s->type == FTYPE_FILE)
510 DeviceIoControl(s->hfile, IOCTL_STORAGE_EJECT_MEDIA,
511 NULL, 0, NULL, 0, &lpBytesReturned, NULL);
513 DeviceIoControl(s->hfile, IOCTL_STORAGE_LOAD_MEDIA,
514 NULL, 0, NULL, 0, &lpBytesReturned, NULL);
518 static int raw_set_locked(BlockDriverState *bs, int locked)
524 BlockDriver bdrv_host_device = {
526 sizeof(BDRVRawState),
527 NULL, /* no probe for protocols */
536 .bdrv_aio_read = raw_aio_read,
537 .bdrv_aio_write = raw_aio_write,
538 .bdrv_aio_cancel = raw_aio_cancel,
539 .aiocb_size = sizeof(RawAIOCB);
541 .bdrv_pread = raw_pread,
542 .bdrv_pwrite = raw_pwrite,
543 .bdrv_getlength = raw_getlength,