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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:
1.1.1.3 ! root 150: static int raw_flush(BlockDriverState *bs)
1.1 root 151: {
152: BDRVRawState *s = bs->opaque;
1.1.1.3 ! root 153: int ret;
! 154:
! 155: ret = FlushFileBuffers(s->hfile);
! 156: if (ret == 0) {
! 157: return -EIO;
! 158: }
! 159:
! 160: return 0;
1.1 root 161: }
162:
163: static void raw_close(BlockDriverState *bs)
164: {
165: BDRVRawState *s = bs->opaque;
166: CloseHandle(s->hfile);
167: }
168:
169: static int raw_truncate(BlockDriverState *bs, int64_t offset)
170: {
171: BDRVRawState *s = bs->opaque;
172: LONG low, high;
173:
174: low = offset;
175: high = offset >> 32;
176: if (!SetFilePointer(s->hfile, low, &high, FILE_BEGIN))
177: return -EIO;
178: if (!SetEndOfFile(s->hfile))
179: return -EIO;
180: return 0;
181: }
182:
183: static int64_t raw_getlength(BlockDriverState *bs)
184: {
185: BDRVRawState *s = bs->opaque;
186: LARGE_INTEGER l;
187: ULARGE_INTEGER available, total, total_free;
188: DISK_GEOMETRY_EX dg;
189: DWORD count;
190: BOOL status;
191:
192: switch(s->type) {
193: case FTYPE_FILE:
194: l.LowPart = GetFileSize(s->hfile, (PDWORD)&l.HighPart);
195: if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
196: return -EIO;
197: break;
198: case FTYPE_CD:
199: if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free))
200: return -EIO;
201: l.QuadPart = total.QuadPart;
202: break;
203: case FTYPE_HARDDISK:
204: status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
205: NULL, 0, &dg, sizeof(dg), &count, NULL);
206: if (status != 0) {
207: l = dg.DiskSize;
208: }
209: break;
210: default:
211: return -EIO;
212: }
213: return l.QuadPart;
214: }
215:
216: static int raw_create(const char *filename, QEMUOptionParameter *options)
217: {
218: int fd;
219: int64_t total_size = 0;
220:
221: /* Read out options */
222: while (options && options->name) {
223: if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
224: total_size = options->value.n / 512;
225: }
226: options++;
227: }
228:
229: fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
230: 0644);
231: if (fd < 0)
232: return -EIO;
233: set_sparse(fd);
234: ftruncate(fd, total_size * 512);
235: close(fd);
236: return 0;
237: }
238:
239: static QEMUOptionParameter raw_create_options[] = {
240: {
241: .name = BLOCK_OPT_SIZE,
242: .type = OPT_SIZE,
243: .help = "Virtual disk size"
244: },
245: { NULL }
246: };
247:
1.1.1.2 root 248: static BlockDriver bdrv_file = {
249: .format_name = "file",
250: .protocol_name = "file",
1.1 root 251: .instance_size = sizeof(BDRVRawState),
1.1.1.2 root 252: .bdrv_file_open = raw_open,
1.1 root 253: .bdrv_close = raw_close,
254: .bdrv_create = raw_create,
255: .bdrv_flush = raw_flush,
256: .bdrv_read = raw_read,
257: .bdrv_write = raw_write,
258: .bdrv_truncate = raw_truncate,
259: .bdrv_getlength = raw_getlength,
260:
261: .create_options = raw_create_options,
262: };
263:
264: /***********************************************/
265: /* host device */
266:
267: static int find_cdrom(char *cdrom_name, int cdrom_name_size)
268: {
269: char drives[256], *pdrv = drives;
270: UINT type;
271:
272: memset(drives, 0, sizeof(drives));
273: GetLogicalDriveStrings(sizeof(drives), drives);
274: while(pdrv[0] != '\0') {
275: type = GetDriveType(pdrv);
276: switch(type) {
277: case DRIVE_CDROM:
278: snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]);
279: return 0;
280: break;
281: }
282: pdrv += lstrlen(pdrv) + 1;
283: }
284: return -1;
285: }
286:
287: static int find_device_type(BlockDriverState *bs, const char *filename)
288: {
289: BDRVRawState *s = bs->opaque;
290: UINT type;
291: const char *p;
292:
293: if (strstart(filename, "\\\\.\\", &p) ||
294: strstart(filename, "//./", &p)) {
295: if (stristart(p, "PhysicalDrive", NULL))
296: return FTYPE_HARDDISK;
297: snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]);
298: type = GetDriveType(s->drive_path);
299: switch (type) {
300: case DRIVE_REMOVABLE:
301: case DRIVE_FIXED:
302: return FTYPE_HARDDISK;
303: case DRIVE_CDROM:
304: return FTYPE_CD;
305: default:
306: return FTYPE_FILE;
307: }
308: } else {
309: return FTYPE_FILE;
310: }
311: }
312:
313: static int hdev_probe_device(const char *filename)
314: {
315: if (strstart(filename, "/dev/cdrom", NULL))
316: return 100;
317: if (is_windows_drive(filename))
318: return 100;
319: return 0;
320: }
321:
322: static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
323: {
324: BDRVRawState *s = bs->opaque;
325: int access_flags, create_flags;
326: DWORD overlapped;
327: char device_name[64];
328:
329: if (strstart(filename, "/dev/cdrom", NULL)) {
330: if (find_cdrom(device_name, sizeof(device_name)) < 0)
331: return -ENOENT;
332: filename = device_name;
333: } else {
334: /* transform drive letters into device name */
335: if (((filename[0] >= 'a' && filename[0] <= 'z') ||
336: (filename[0] >= 'A' && filename[0] <= 'Z')) &&
337: filename[1] == ':' && filename[2] == '\0') {
338: snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]);
339: filename = device_name;
340: }
341: }
342: s->type = find_device_type(bs, filename);
343:
1.1.1.2 root 344: if (flags & BDRV_O_RDWR) {
1.1 root 345: access_flags = GENERIC_READ | GENERIC_WRITE;
346: } else {
347: access_flags = GENERIC_READ;
348: }
349: create_flags = OPEN_EXISTING;
350:
351: overlapped = FILE_ATTRIBUTE_NORMAL;
352: if ((flags & BDRV_O_NOCACHE))
353: overlapped |= FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH;
354: else if (!(flags & BDRV_O_CACHE_WB))
355: overlapped |= FILE_FLAG_WRITE_THROUGH;
356: s->hfile = CreateFile(filename, access_flags,
357: FILE_SHARE_READ, NULL,
358: create_flags, overlapped, NULL);
359: if (s->hfile == INVALID_HANDLE_VALUE) {
360: int err = GetLastError();
361:
362: if (err == ERROR_ACCESS_DENIED)
363: return -EACCES;
364: return -1;
365: }
366: return 0;
367: }
368:
369: #if 0
370: /***********************************************/
371: /* removable device additional commands */
372:
373: static int raw_is_inserted(BlockDriverState *bs)
374: {
375: return 1;
376: }
377:
378: static int raw_media_changed(BlockDriverState *bs)
379: {
380: return -ENOTSUP;
381: }
382:
383: static int raw_eject(BlockDriverState *bs, int eject_flag)
384: {
385: DWORD ret_count;
386:
387: if (s->type == FTYPE_FILE)
388: return -ENOTSUP;
389: if (eject_flag) {
390: DeviceIoControl(s->hfile, IOCTL_STORAGE_EJECT_MEDIA,
391: NULL, 0, NULL, 0, &lpBytesReturned, NULL);
392: } else {
393: DeviceIoControl(s->hfile, IOCTL_STORAGE_LOAD_MEDIA,
394: NULL, 0, NULL, 0, &lpBytesReturned, NULL);
395: }
396: }
397:
398: static int raw_set_locked(BlockDriverState *bs, int locked)
399: {
400: return -ENOTSUP;
401: }
402: #endif
403:
1.1.1.2 root 404: static int hdev_has_zero_init(BlockDriverState *bs)
405: {
406: return 0;
407: }
408:
1.1 root 409: static BlockDriver bdrv_host_device = {
410: .format_name = "host_device",
1.1.1.2 root 411: .protocol_name = "host_device",
1.1 root 412: .instance_size = sizeof(BDRVRawState),
413: .bdrv_probe_device = hdev_probe_device,
1.1.1.2 root 414: .bdrv_file_open = hdev_open,
1.1 root 415: .bdrv_close = raw_close,
416: .bdrv_flush = raw_flush,
1.1.1.2 root 417: .bdrv_has_zero_init = hdev_has_zero_init,
1.1 root 418:
419: .bdrv_read = raw_read,
420: .bdrv_write = raw_write,
421: .bdrv_getlength = raw_getlength,
422: };
423:
1.1.1.2 root 424: static void bdrv_file_init(void)
1.1 root 425: {
1.1.1.2 root 426: bdrv_register(&bdrv_file);
1.1 root 427: bdrv_register(&bdrv_host_device);
428: }
429:
1.1.1.2 root 430: block_init(bdrv_file_init);
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