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"
32 #define FTYPE_HARDDISK 2
34 typedef struct BDRVRawState {
37 char drive_path[16]; /* format: "d:\" */
40 int qemu_ftruncate64(int fd, int64_t length)
47 if ((GetVersion() & 0x80000000UL) && (length >> 32) != 0)
50 h = (HANDLE)_get_osfhandle(fd);
52 /* get current position, ftruncate do not change position */
54 li.LowPart = SetFilePointer (h, 0, &li.HighPart, FILE_CURRENT);
55 if (li.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
59 if (!SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN))
61 res = SetEndOfFile(h);
63 /* back to old position */
64 SetFilePointer(h, li.LowPart, &li.HighPart, FILE_BEGIN);
68 static int set_sparse(int fd)
71 return (int) DeviceIoControl((HANDLE)_get_osfhandle(fd), FSCTL_SET_SPARSE,
72 NULL, 0, NULL, 0, &returned, NULL);
75 static int raw_open(BlockDriverState *bs, const char *filename, int flags)
77 BDRVRawState *s = bs->opaque;
78 int access_flags, create_flags;
83 if ((flags & BDRV_O_ACCESS) == O_RDWR) {
84 access_flags = GENERIC_READ | GENERIC_WRITE;
86 access_flags = GENERIC_READ;
88 if (flags & BDRV_O_CREAT) {
89 create_flags = CREATE_ALWAYS;
91 create_flags = OPEN_EXISTING;
93 overlapped = FILE_ATTRIBUTE_NORMAL;
94 if ((flags & BDRV_O_NOCACHE))
95 overlapped |= FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH;
96 else if (!(flags & BDRV_O_CACHE_WB))
97 overlapped |= FILE_FLAG_WRITE_THROUGH;
98 s->hfile = CreateFile(filename, access_flags,
99 FILE_SHARE_READ, NULL,
100 create_flags, overlapped, NULL);
101 if (s->hfile == INVALID_HANDLE_VALUE) {
102 int err = GetLastError();
104 if (err == ERROR_ACCESS_DENIED)
111 static int raw_read(BlockDriverState *bs, int64_t sector_num,
112 uint8_t *buf, int nb_sectors)
114 BDRVRawState *s = bs->opaque;
118 int64_t offset = sector_num * 512;
119 int count = nb_sectors * 512;
121 memset(&ov, 0, sizeof(ov));
123 ov.OffsetHigh = offset >> 32;
124 ret = ReadFile(s->hfile, buf, count, &ret_count, &ov);
127 if (ret_count == count)
132 static int raw_write(BlockDriverState *bs, int64_t sector_num,
133 const uint8_t *buf, int nb_sectors)
135 BDRVRawState *s = bs->opaque;
139 int64_t offset = sector_num * 512;
140 int count = nb_sectors * 512;
142 memset(&ov, 0, sizeof(ov));
144 ov.OffsetHigh = offset >> 32;
145 ret = WriteFile(s->hfile, buf, count, &ret_count, &ov);
148 if (ret_count == count)
153 static void raw_flush(BlockDriverState *bs)
155 BDRVRawState *s = bs->opaque;
156 FlushFileBuffers(s->hfile);
159 static void raw_close(BlockDriverState *bs)
161 BDRVRawState *s = bs->opaque;
162 CloseHandle(s->hfile);
165 static int raw_truncate(BlockDriverState *bs, int64_t offset)
167 BDRVRawState *s = bs->opaque;
172 if (!SetFilePointer(s->hfile, low, &high, FILE_BEGIN))
174 if (!SetEndOfFile(s->hfile))
179 static int64_t raw_getlength(BlockDriverState *bs)
181 BDRVRawState *s = bs->opaque;
183 ULARGE_INTEGER available, total, total_free;
190 l.LowPart = GetFileSize(s->hfile, (PDWORD)&l.HighPart);
191 if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
195 if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free))
197 l.QuadPart = total.QuadPart;
200 status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
201 NULL, 0, &dg, sizeof(dg), &count, NULL);
212 static int raw_create(const char *filename, int64_t total_size,
213 const char *backing_file, int flags)
217 if (flags || backing_file)
220 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
225 ftruncate(fd, total_size * 512);
230 BlockDriver bdrv_raw = {
231 .format_name = "raw",
232 .instance_size = sizeof(BDRVRawState),
233 .bdrv_open = raw_open,
234 .bdrv_close = raw_close,
235 .bdrv_create = raw_create,
236 .bdrv_flush = raw_flush,
237 .bdrv_read = raw_read,
238 .bdrv_write = raw_write,
239 .bdrv_truncate = raw_truncate,
240 .bdrv_getlength = raw_getlength,
243 /***********************************************/
246 static int find_cdrom(char *cdrom_name, int cdrom_name_size)
248 char drives[256], *pdrv = drives;
251 memset(drives, 0, sizeof(drives));
252 GetLogicalDriveStrings(sizeof(drives), drives);
253 while(pdrv[0] != '\0') {
254 type = GetDriveType(pdrv);
257 snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]);
261 pdrv += lstrlen(pdrv) + 1;
266 static int find_device_type(BlockDriverState *bs, const char *filename)
268 BDRVRawState *s = bs->opaque;
272 if (strstart(filename, "\\\\.\\", &p) ||
273 strstart(filename, "//./", &p)) {
274 if (stristart(p, "PhysicalDrive", NULL))
275 return FTYPE_HARDDISK;
276 snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]);
277 type = GetDriveType(s->drive_path);
279 case DRIVE_REMOVABLE:
281 return FTYPE_HARDDISK;
292 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
294 BDRVRawState *s = bs->opaque;
295 int access_flags, create_flags;
297 char device_name[64];
299 if (strstart(filename, "/dev/cdrom", NULL)) {
300 if (find_cdrom(device_name, sizeof(device_name)) < 0)
302 filename = device_name;
304 /* transform drive letters into device name */
305 if (((filename[0] >= 'a' && filename[0] <= 'z') ||
306 (filename[0] >= 'A' && filename[0] <= 'Z')) &&
307 filename[1] == ':' && filename[2] == '\0') {
308 snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]);
309 filename = device_name;
312 s->type = find_device_type(bs, filename);
314 if ((flags & BDRV_O_ACCESS) == O_RDWR) {
315 access_flags = GENERIC_READ | GENERIC_WRITE;
317 access_flags = GENERIC_READ;
319 create_flags = OPEN_EXISTING;
321 overlapped = FILE_ATTRIBUTE_NORMAL;
322 if ((flags & BDRV_O_NOCACHE))
323 overlapped |= FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH;
324 else if (!(flags & BDRV_O_CACHE_WB))
325 overlapped |= FILE_FLAG_WRITE_THROUGH;
326 s->hfile = CreateFile(filename, access_flags,
327 FILE_SHARE_READ, NULL,
328 create_flags, overlapped, NULL);
329 if (s->hfile == INVALID_HANDLE_VALUE) {
330 int err = GetLastError();
332 if (err == ERROR_ACCESS_DENIED)
340 /***********************************************/
341 /* removable device additional commands */
343 static int raw_is_inserted(BlockDriverState *bs)
348 static int raw_media_changed(BlockDriverState *bs)
353 static int raw_eject(BlockDriverState *bs, int eject_flag)
357 if (s->type == FTYPE_FILE)
360 DeviceIoControl(s->hfile, IOCTL_STORAGE_EJECT_MEDIA,
361 NULL, 0, NULL, 0, &lpBytesReturned, NULL);
363 DeviceIoControl(s->hfile, IOCTL_STORAGE_LOAD_MEDIA,
364 NULL, 0, NULL, 0, &lpBytesReturned, NULL);
368 static int raw_set_locked(BlockDriverState *bs, int locked)
374 BlockDriver bdrv_host_device = {
375 .format_name = "host_device",
376 .instance_size = sizeof(BDRVRawState),
377 .bdrv_open = hdev_open,
378 .bdrv_close = raw_close,
379 .bdrv_flush = raw_flush,
381 .bdrv_read = raw_read,
382 .bdrv_write = raw_write,
383 .bdrv_getlength = raw_getlength,