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1.1 root 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: */
24: #include "qemu-common.h"
25: #include "qemu-timer.h"
26: #include "block_int.h"
27: #include "module.h"
28: #include <windows.h>
29: #include <winioctl.h>
30:
31: #define FTYPE_FILE 0
32: #define FTYPE_CD 1
33: #define FTYPE_HARDDISK 2
34:
35: typedef struct BDRVRawState {
36: HANDLE hfile;
37: int type;
38: char drive_path[16]; /* format: "d:\" */
39: } BDRVRawState;
40:
41: int qemu_ftruncate64(int fd, int64_t length)
42: {
43: LARGE_INTEGER li;
44: LONG high;
45: HANDLE h;
46: BOOL res;
47:
48: if ((GetVersion() & 0x80000000UL) && (length >> 32) != 0)
49: return -1;
50:
51: h = (HANDLE)_get_osfhandle(fd);
52:
53: /* get current position, ftruncate do not change position */
54: li.HighPart = 0;
55: li.LowPart = SetFilePointer (h, 0, &li.HighPart, FILE_CURRENT);
56: if (li.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
57: return -1;
58:
59: high = length >> 32;
60: if (!SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN))
61: return -1;
62: res = SetEndOfFile(h);
63:
64: /* back to old position */
65: SetFilePointer(h, li.LowPart, &li.HighPart, FILE_BEGIN);
66: return res ? 0 : -1;
67: }
68:
69: static int set_sparse(int fd)
70: {
71: DWORD returned;
72: return (int) DeviceIoControl((HANDLE)_get_osfhandle(fd), FSCTL_SET_SPARSE,
73: NULL, 0, NULL, 0, &returned, NULL);
74: }
75:
76: static int raw_open(BlockDriverState *bs, const char *filename, int flags)
77: {
78: BDRVRawState *s = bs->opaque;
1.1.1.2 ! root 79: int access_flags;
1.1 root 80: DWORD overlapped;
81:
82: s->type = FTYPE_FILE;
83:
1.1.1.2 ! root 84: if (flags & BDRV_O_RDWR) {
1.1 root 85: access_flags = GENERIC_READ | GENERIC_WRITE;
86: } else {
87: access_flags = GENERIC_READ;
88: }
1.1.1.2 ! root 89:
1.1 root 90: overlapped = FILE_ATTRIBUTE_NORMAL;
91: if ((flags & BDRV_O_NOCACHE))
92: overlapped |= FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH;
93: else if (!(flags & BDRV_O_CACHE_WB))
94: overlapped |= FILE_FLAG_WRITE_THROUGH;
95: s->hfile = CreateFile(filename, access_flags,
96: FILE_SHARE_READ, NULL,
1.1.1.2 ! root 97: OPEN_EXISTING, overlapped, NULL);
1.1 root 98: if (s->hfile == INVALID_HANDLE_VALUE) {
99: int err = GetLastError();
100:
101: if (err == ERROR_ACCESS_DENIED)
102: return -EACCES;
103: return -1;
104: }
105: return 0;
106: }
107:
108: static int raw_read(BlockDriverState *bs, int64_t sector_num,
109: uint8_t *buf, int nb_sectors)
110: {
111: BDRVRawState *s = bs->opaque;
112: OVERLAPPED ov;
113: DWORD ret_count;
114: int ret;
115: int64_t offset = sector_num * 512;
116: int count = nb_sectors * 512;
117:
118: memset(&ov, 0, sizeof(ov));
119: ov.Offset = offset;
120: ov.OffsetHigh = offset >> 32;
121: ret = ReadFile(s->hfile, buf, count, &ret_count, &ov);
122: if (!ret)
123: return ret_count;
124: if (ret_count == count)
125: ret_count = 0;
126: return ret_count;
127: }
128:
129: static int raw_write(BlockDriverState *bs, int64_t sector_num,
130: const uint8_t *buf, int nb_sectors)
131: {
132: BDRVRawState *s = bs->opaque;
133: OVERLAPPED ov;
134: DWORD ret_count;
135: int ret;
136: int64_t offset = sector_num * 512;
137: int count = nb_sectors * 512;
138:
139: memset(&ov, 0, sizeof(ov));
140: ov.Offset = offset;
141: ov.OffsetHigh = offset >> 32;
142: ret = WriteFile(s->hfile, buf, count, &ret_count, &ov);
143: if (!ret)
144: return ret_count;
145: if (ret_count == count)
146: ret_count = 0;
147: return ret_count;
148: }
149:
150: static void raw_flush(BlockDriverState *bs)
151: {
152: BDRVRawState *s = bs->opaque;
153: FlushFileBuffers(s->hfile);
154: }
155:
156: static void raw_close(BlockDriverState *bs)
157: {
158: BDRVRawState *s = bs->opaque;
159: CloseHandle(s->hfile);
160: }
161:
162: static int raw_truncate(BlockDriverState *bs, int64_t offset)
163: {
164: BDRVRawState *s = bs->opaque;
165: LONG low, high;
166:
167: low = offset;
168: high = offset >> 32;
169: if (!SetFilePointer(s->hfile, low, &high, FILE_BEGIN))
170: return -EIO;
171: if (!SetEndOfFile(s->hfile))
172: return -EIO;
173: return 0;
174: }
175:
176: static int64_t raw_getlength(BlockDriverState *bs)
177: {
178: BDRVRawState *s = bs->opaque;
179: LARGE_INTEGER l;
180: ULARGE_INTEGER available, total, total_free;
181: DISK_GEOMETRY_EX dg;
182: DWORD count;
183: BOOL status;
184:
185: switch(s->type) {
186: case FTYPE_FILE:
187: l.LowPart = GetFileSize(s->hfile, (PDWORD)&l.HighPart);
188: if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
189: return -EIO;
190: break;
191: case FTYPE_CD:
192: if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free))
193: return -EIO;
194: l.QuadPart = total.QuadPart;
195: break;
196: case FTYPE_HARDDISK:
197: status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
198: NULL, 0, &dg, sizeof(dg), &count, NULL);
199: if (status != 0) {
200: l = dg.DiskSize;
201: }
202: break;
203: default:
204: return -EIO;
205: }
206: return l.QuadPart;
207: }
208:
209: static int raw_create(const char *filename, QEMUOptionParameter *options)
210: {
211: int fd;
212: int64_t total_size = 0;
213:
214: /* Read out options */
215: while (options && options->name) {
216: if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
217: total_size = options->value.n / 512;
218: }
219: options++;
220: }
221:
222: fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
223: 0644);
224: if (fd < 0)
225: return -EIO;
226: set_sparse(fd);
227: ftruncate(fd, total_size * 512);
228: close(fd);
229: return 0;
230: }
231:
232: static QEMUOptionParameter raw_create_options[] = {
233: {
234: .name = BLOCK_OPT_SIZE,
235: .type = OPT_SIZE,
236: .help = "Virtual disk size"
237: },
238: { NULL }
239: };
240:
1.1.1.2 ! root 241: static BlockDriver bdrv_file = {
! 242: .format_name = "file",
! 243: .protocol_name = "file",
1.1 root 244: .instance_size = sizeof(BDRVRawState),
1.1.1.2 ! root 245: .bdrv_file_open = raw_open,
1.1 root 246: .bdrv_close = raw_close,
247: .bdrv_create = raw_create,
248: .bdrv_flush = raw_flush,
249: .bdrv_read = raw_read,
250: .bdrv_write = raw_write,
251: .bdrv_truncate = raw_truncate,
252: .bdrv_getlength = raw_getlength,
253:
254: .create_options = raw_create_options,
255: };
256:
257: /***********************************************/
258: /* host device */
259:
260: static int find_cdrom(char *cdrom_name, int cdrom_name_size)
261: {
262: char drives[256], *pdrv = drives;
263: UINT type;
264:
265: memset(drives, 0, sizeof(drives));
266: GetLogicalDriveStrings(sizeof(drives), drives);
267: while(pdrv[0] != '\0') {
268: type = GetDriveType(pdrv);
269: switch(type) {
270: case DRIVE_CDROM:
271: snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]);
272: return 0;
273: break;
274: }
275: pdrv += lstrlen(pdrv) + 1;
276: }
277: return -1;
278: }
279:
280: static int find_device_type(BlockDriverState *bs, const char *filename)
281: {
282: BDRVRawState *s = bs->opaque;
283: UINT type;
284: const char *p;
285:
286: if (strstart(filename, "\\\\.\\", &p) ||
287: strstart(filename, "//./", &p)) {
288: if (stristart(p, "PhysicalDrive", NULL))
289: return FTYPE_HARDDISK;
290: snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]);
291: type = GetDriveType(s->drive_path);
292: switch (type) {
293: case DRIVE_REMOVABLE:
294: case DRIVE_FIXED:
295: return FTYPE_HARDDISK;
296: case DRIVE_CDROM:
297: return FTYPE_CD;
298: default:
299: return FTYPE_FILE;
300: }
301: } else {
302: return FTYPE_FILE;
303: }
304: }
305:
306: static int hdev_probe_device(const char *filename)
307: {
308: if (strstart(filename, "/dev/cdrom", NULL))
309: return 100;
310: if (is_windows_drive(filename))
311: return 100;
312: return 0;
313: }
314:
315: static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
316: {
317: BDRVRawState *s = bs->opaque;
318: int access_flags, create_flags;
319: DWORD overlapped;
320: char device_name[64];
321:
322: if (strstart(filename, "/dev/cdrom", NULL)) {
323: if (find_cdrom(device_name, sizeof(device_name)) < 0)
324: return -ENOENT;
325: filename = device_name;
326: } else {
327: /* transform drive letters into device name */
328: if (((filename[0] >= 'a' && filename[0] <= 'z') ||
329: (filename[0] >= 'A' && filename[0] <= 'Z')) &&
330: filename[1] == ':' && filename[2] == '\0') {
331: snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]);
332: filename = device_name;
333: }
334: }
335: s->type = find_device_type(bs, filename);
336:
1.1.1.2 ! root 337: if (flags & BDRV_O_RDWR) {
1.1 root 338: access_flags = GENERIC_READ | GENERIC_WRITE;
339: } else {
340: access_flags = GENERIC_READ;
341: }
342: create_flags = OPEN_EXISTING;
343:
344: overlapped = FILE_ATTRIBUTE_NORMAL;
345: if ((flags & BDRV_O_NOCACHE))
346: overlapped |= FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH;
347: else if (!(flags & BDRV_O_CACHE_WB))
348: overlapped |= FILE_FLAG_WRITE_THROUGH;
349: s->hfile = CreateFile(filename, access_flags,
350: FILE_SHARE_READ, NULL,
351: create_flags, overlapped, NULL);
352: if (s->hfile == INVALID_HANDLE_VALUE) {
353: int err = GetLastError();
354:
355: if (err == ERROR_ACCESS_DENIED)
356: return -EACCES;
357: return -1;
358: }
359: return 0;
360: }
361:
362: #if 0
363: /***********************************************/
364: /* removable device additional commands */
365:
366: static int raw_is_inserted(BlockDriverState *bs)
367: {
368: return 1;
369: }
370:
371: static int raw_media_changed(BlockDriverState *bs)
372: {
373: return -ENOTSUP;
374: }
375:
376: static int raw_eject(BlockDriverState *bs, int eject_flag)
377: {
378: DWORD ret_count;
379:
380: if (s->type == FTYPE_FILE)
381: return -ENOTSUP;
382: if (eject_flag) {
383: DeviceIoControl(s->hfile, IOCTL_STORAGE_EJECT_MEDIA,
384: NULL, 0, NULL, 0, &lpBytesReturned, NULL);
385: } else {
386: DeviceIoControl(s->hfile, IOCTL_STORAGE_LOAD_MEDIA,
387: NULL, 0, NULL, 0, &lpBytesReturned, NULL);
388: }
389: }
390:
391: static int raw_set_locked(BlockDriverState *bs, int locked)
392: {
393: return -ENOTSUP;
394: }
395: #endif
396:
1.1.1.2 ! root 397: static int hdev_has_zero_init(BlockDriverState *bs)
! 398: {
! 399: return 0;
! 400: }
! 401:
1.1 root 402: static BlockDriver bdrv_host_device = {
403: .format_name = "host_device",
1.1.1.2 ! root 404: .protocol_name = "host_device",
1.1 root 405: .instance_size = sizeof(BDRVRawState),
406: .bdrv_probe_device = hdev_probe_device,
1.1.1.2 ! root 407: .bdrv_file_open = hdev_open,
1.1 root 408: .bdrv_close = raw_close,
409: .bdrv_flush = raw_flush,
1.1.1.2 ! root 410: .bdrv_has_zero_init = hdev_has_zero_init,
1.1 root 411:
412: .bdrv_read = raw_read,
413: .bdrv_write = raw_write,
414: .bdrv_getlength = raw_getlength,
415: };
416:
1.1.1.2 ! root 417: static void bdrv_file_init(void)
1.1 root 418: {
1.1.1.2 ! root 419: bdrv_register(&bdrv_file);
1.1 root 420: bdrv_register(&bdrv_host_device);
421: }
422:
1.1.1.2 ! root 423: block_init(bdrv_file_init);
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