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);
151 static int raw_write(BlockDriverState *bs, int64_t sector_num,
152 const uint8_t *buf, int nb_sectors)
154 BDRVRawState *s = bs->opaque;
158 int64_t offset = sector_num * 512;
159 int count = nb_sectors * 512;
161 memset(&ov, 0, sizeof(ov));
163 ov.OffsetHigh = offset >> 32;
164 ret = WriteFile(s->hfile, buf, count, &ret_count, &ov);
167 ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
178 static void raw_aio_cb(void *opaque)
180 RawAIOCB *acb = opaque;
181 BlockDriverState *bs = acb->common.bs;
182 BDRVRawState *s = bs->opaque;
186 ret = GetOverlappedResult(s->hfile, &acb->ov, &ret_count, TRUE);
187 if (!ret || ret_count != acb->count) {
188 acb->common.cb(acb->common.opaque, -EIO);
190 acb->common.cb(acb->common.opaque, 0);
194 static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
195 int64_t sector_num, uint8_t *buf, int nb_sectors,
196 BlockDriverCompletionFunc *cb, void *opaque)
201 acb = qemu_aio_get(bs, cb, opaque);
203 acb->hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
205 qemu_aio_release(acb);
209 memset(&acb->ov, 0, sizeof(acb->ov));
210 offset = sector_num * 512;
211 acb->ov.Offset = offset;
212 acb->ov.OffsetHigh = offset >> 32;
213 acb->ov.hEvent = acb->hEvent;
214 acb->count = nb_sectors * 512;
215 qemu_add_wait_object(acb->ov.hEvent, raw_aio_cb, acb);
219 static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
220 int64_t sector_num, uint8_t *buf, int nb_sectors,
221 BlockDriverCompletionFunc *cb, void *opaque)
223 BDRVRawState *s = bs->opaque;
227 acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
230 ret = ReadFile(s->hfile, buf, acb->count, NULL, &acb->ov);
232 qemu_aio_release(acb);
235 qemu_aio_release(acb);
236 return (BlockDriverAIOCB *)acb;
239 static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
240 int64_t sector_num, uint8_t *buf, int nb_sectors,
241 BlockDriverCompletionFunc *cb, void *opaque)
243 BDRVRawState *s = bs->opaque;
247 acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
250 ret = WriteFile(s->hfile, buf, acb->count, NULL, &acb->ov);
252 qemu_aio_release(acb);
255 qemu_aio_release(acb);
256 return (BlockDriverAIOCB *)acb;
259 static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
261 RawAIOCB *acb = (RawAIOCB *)blockacb;
262 BlockDriverState *bs = acb->common.bs;
263 BDRVRawState *s = bs->opaque;
265 qemu_del_wait_object(acb->ov.hEvent, raw_aio_cb, acb);
266 /* XXX: if more than one async I/O it is not correct */
268 qemu_aio_release(acb);
270 #endif /* #if WIN32_AIO */
272 static void raw_flush(BlockDriverState *bs)
274 BDRVRawState *s = bs->opaque;
275 FlushFileBuffers(s->hfile);
278 static void raw_close(BlockDriverState *bs)
280 BDRVRawState *s = bs->opaque;
281 CloseHandle(s->hfile);
284 static int raw_truncate(BlockDriverState *bs, int64_t offset)
286 BDRVRawState *s = bs->opaque;
291 if (!SetFilePointer(s->hfile, low, &high, FILE_BEGIN))
293 if (!SetEndOfFile(s->hfile))
298 static int64_t raw_getlength(BlockDriverState *bs)
300 BDRVRawState *s = bs->opaque;
302 ULARGE_INTEGER available, total, total_free;
309 l.LowPart = GetFileSize(s->hfile, &l.HighPart);
310 if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
314 if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free))
316 l.QuadPart = total.QuadPart;
319 status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
320 NULL, 0, &dg, sizeof(dg), &count, NULL);
331 static int raw_create(const char *filename, int64_t total_size,
332 const char *backing_file, int flags)
336 if (flags || backing_file)
339 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
344 ftruncate(fd, total_size * 512);
349 BlockDriver bdrv_raw = {
351 sizeof(BDRVRawState),
352 NULL, /* no probe for protocols */
361 .bdrv_aio_read = raw_aio_read,
362 .bdrv_aio_write = raw_aio_write,
363 .bdrv_aio_cancel = raw_aio_cancel,
364 .aiocb_size = sizeof(RawAIOCB);
366 .bdrv_read = raw_read,
367 .bdrv_write = raw_write,
368 .bdrv_truncate = raw_truncate,
369 .bdrv_getlength = raw_getlength,
372 /***********************************************/
375 static int find_cdrom(char *cdrom_name, int cdrom_name_size)
377 char drives[256], *pdrv = drives;
380 memset(drives, 0, sizeof(drives));
381 GetLogicalDriveStrings(sizeof(drives), drives);
382 while(pdrv[0] != '\0') {
383 type = GetDriveType(pdrv);
386 snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]);
390 pdrv += lstrlen(pdrv) + 1;
395 static int find_device_type(BlockDriverState *bs, const char *filename)
397 BDRVRawState *s = bs->opaque;
401 if (strstart(filename, "\\\\.\\", &p) ||
402 strstart(filename, "//./", &p)) {
403 if (stristart(p, "PhysicalDrive", NULL))
404 return FTYPE_HARDDISK;
405 snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]);
406 type = GetDriveType(s->drive_path);
407 if (type == DRIVE_CDROM)
416 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
418 BDRVRawState *s = bs->opaque;
419 int access_flags, create_flags;
421 char device_name[64];
423 if (strstart(filename, "/dev/cdrom", NULL)) {
424 if (find_cdrom(device_name, sizeof(device_name)) < 0)
426 filename = device_name;
428 /* transform drive letters into device name */
429 if (((filename[0] >= 'a' && filename[0] <= 'z') ||
430 (filename[0] >= 'A' && filename[0] <= 'Z')) &&
431 filename[1] == ':' && filename[2] == '\0') {
432 snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]);
433 filename = device_name;
436 s->type = find_device_type(bs, filename);
438 if ((flags & BDRV_O_ACCESS) == O_RDWR) {
439 access_flags = GENERIC_READ | GENERIC_WRITE;
441 access_flags = GENERIC_READ;
443 create_flags = OPEN_EXISTING;
446 overlapped = FILE_FLAG_OVERLAPPED;
448 overlapped = FILE_ATTRIBUTE_NORMAL;
450 if ((flags & BDRV_O_NOCACHE))
451 overlapped |= FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH;
452 else if (!(flags & BDRV_O_CACHE_WB))
453 overlapped |= FILE_FLAG_WRITE_THROUGH;
454 s->hfile = CreateFile(filename, access_flags,
455 FILE_SHARE_READ, NULL,
456 create_flags, overlapped, NULL);
457 if (s->hfile == INVALID_HANDLE_VALUE) {
458 int err = GetLastError();
460 if (err == ERROR_ACCESS_DENIED)
468 /***********************************************/
469 /* removable device additional commands */
471 static int raw_is_inserted(BlockDriverState *bs)
476 static int raw_media_changed(BlockDriverState *bs)
481 static int raw_eject(BlockDriverState *bs, int eject_flag)
485 if (s->type == FTYPE_FILE)
488 DeviceIoControl(s->hfile, IOCTL_STORAGE_EJECT_MEDIA,
489 NULL, 0, NULL, 0, &lpBytesReturned, NULL);
491 DeviceIoControl(s->hfile, IOCTL_STORAGE_LOAD_MEDIA,
492 NULL, 0, NULL, 0, &lpBytesReturned, NULL);
496 static int raw_set_locked(BlockDriverState *bs, int locked)
502 BlockDriver bdrv_host_device = {
503 .format_name = "host_device",
504 .instance_size = sizeof(BDRVRawState),
505 .bdrv_open = hdev_open,
506 .bdrv_close = raw_close,
507 .bdrv_flush = raw_flush,
510 .bdrv_aio_read = raw_aio_read,
511 .bdrv_aio_write = raw_aio_write,
512 .bdrv_aio_cancel = raw_aio_cancel,
513 .aiocb_size = sizeof(RawAIOCB);
515 .bdrv_read = raw_read,
516 .bdrv_write = raw_write,
517 .bdrv_getlength = raw_getlength,