sh4/r2d: update pci, usb and kernel management
[qemu/sh4.git] / block-raw-win32.c
blob892f2d1e5a4a58b103b68e252b9b1c5f5dae44db
1 /*
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
22 * THE SOFTWARE.
24 #include "qemu-common.h"
25 #include "qemu-timer.h"
26 #include "block_int.h"
27 #include <assert.h>
28 #include <winioctl.h>
30 //#define WIN32_AIO
32 #define FTYPE_FILE 0
33 #define FTYPE_CD 1
34 #define FTYPE_HARDDISK 2
36 typedef struct BDRVRawState {
37 HANDLE hfile;
38 int type;
39 char drive_path[16]; /* format: "d:\" */
40 } BDRVRawState;
42 typedef struct RawAIOCB {
43 BlockDriverAIOCB common;
44 HANDLE hEvent;
45 OVERLAPPED ov;
46 int count;
47 } RawAIOCB;
49 int qemu_ftruncate64(int fd, int64_t length)
51 LARGE_INTEGER li;
52 LONG high;
53 HANDLE h;
54 BOOL res;
56 if ((GetVersion() & 0x80000000UL) && (length >> 32) != 0)
57 return -1;
59 h = (HANDLE)_get_osfhandle(fd);
61 /* get current position, ftruncate do not change position */
62 li.HighPart = 0;
63 li.LowPart = SetFilePointer (h, 0, &li.HighPart, FILE_CURRENT);
64 if (li.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
65 return -1;
67 high = length >> 32;
68 if (!SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN))
69 return -1;
70 res = SetEndOfFile(h);
72 /* back to old position */
73 SetFilePointer(h, li.LowPart, &li.HighPart, FILE_BEGIN);
74 return res ? 0 : -1;
77 static int set_sparse(int fd)
79 DWORD returned;
80 return (int) DeviceIoControl((HANDLE)_get_osfhandle(fd), FSCTL_SET_SPARSE,
81 NULL, 0, NULL, 0, &returned, NULL);
84 static int raw_open(BlockDriverState *bs, const char *filename, int flags)
86 BDRVRawState *s = bs->opaque;
87 int access_flags, create_flags;
88 DWORD overlapped;
90 s->type = FTYPE_FILE;
92 if ((flags & BDRV_O_ACCESS) == O_RDWR) {
93 access_flags = GENERIC_READ | GENERIC_WRITE;
94 } else {
95 access_flags = GENERIC_READ;
97 if (flags & BDRV_O_CREAT) {
98 create_flags = CREATE_ALWAYS;
99 } else {
100 create_flags = OPEN_EXISTING;
102 #ifdef WIN32_AIO
103 overlapped = FILE_FLAG_OVERLAPPED;
104 #else
105 overlapped = FILE_ATTRIBUTE_NORMAL;
106 #endif
107 if ((flags & BDRV_O_NOCACHE))
108 overlapped |= FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH;
109 else if (!(flags & BDRV_O_CACHE_WB))
110 overlapped |= FILE_FLAG_WRITE_THROUGH;
111 s->hfile = CreateFile(filename, access_flags,
112 FILE_SHARE_READ, NULL,
113 create_flags, overlapped, NULL);
114 if (s->hfile == INVALID_HANDLE_VALUE) {
115 int err = GetLastError();
117 if (err == ERROR_ACCESS_DENIED)
118 return -EACCES;
119 return -1;
121 return 0;
124 static int raw_pread(BlockDriverState *bs, int64_t offset,
125 uint8_t *buf, int count)
127 BDRVRawState *s = bs->opaque;
128 OVERLAPPED ov;
129 DWORD ret_count;
130 int ret;
132 memset(&ov, 0, sizeof(ov));
133 ov.Offset = offset;
134 ov.OffsetHigh = offset >> 32;
135 ret = ReadFile(s->hfile, buf, count, &ret_count, &ov);
136 if (!ret) {
137 #ifdef WIN32_AIO
138 ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
139 if (!ret)
140 return -EIO;
141 else
142 #endif
143 return ret_count;
145 return ret_count;
148 static int raw_pwrite(BlockDriverState *bs, int64_t offset,
149 const uint8_t *buf, int count)
151 BDRVRawState *s = bs->opaque;
152 OVERLAPPED ov;
153 DWORD ret_count;
154 int ret;
156 memset(&ov, 0, sizeof(ov));
157 ov.Offset = offset;
158 ov.OffsetHigh = offset >> 32;
159 ret = WriteFile(s->hfile, buf, count, &ret_count, &ov);
160 if (!ret) {
161 #ifdef WIN32_AIO
162 ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
163 if (!ret)
164 return -EIO;
165 else
166 #endif
167 return ret_count;
169 return ret_count;
172 #ifdef WIN32_AIO
173 static void raw_aio_cb(void *opaque)
175 RawAIOCB *acb = opaque;
176 BlockDriverState *bs = acb->common.bs;
177 BDRVRawState *s = bs->opaque;
178 DWORD ret_count;
179 int ret;
181 ret = GetOverlappedResult(s->hfile, &acb->ov, &ret_count, TRUE);
182 if (!ret || ret_count != acb->count) {
183 acb->common.cb(acb->common.opaque, -EIO);
184 } else {
185 acb->common.cb(acb->common.opaque, 0);
189 static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
190 int64_t sector_num, uint8_t *buf, int nb_sectors,
191 BlockDriverCompletionFunc *cb, void *opaque)
193 RawAIOCB *acb;
194 int64_t offset;
196 acb = qemu_aio_get(bs, cb, opaque);
197 if (acb->hEvent) {
198 acb->hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
199 if (!acb->hEvent) {
200 qemu_aio_release(acb);
201 return NULL;
204 memset(&acb->ov, 0, sizeof(acb->ov));
205 offset = sector_num * 512;
206 acb->ov.Offset = offset;
207 acb->ov.OffsetHigh = offset >> 32;
208 acb->ov.hEvent = acb->hEvent;
209 acb->count = nb_sectors * 512;
210 qemu_add_wait_object(acb->ov.hEvent, raw_aio_cb, acb);
211 return acb;
214 static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
215 int64_t sector_num, uint8_t *buf, int nb_sectors,
216 BlockDriverCompletionFunc *cb, void *opaque)
218 BDRVRawState *s = bs->opaque;
219 RawAIOCB *acb;
220 int ret;
222 acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
223 if (!acb)
224 return NULL;
225 ret = ReadFile(s->hfile, buf, acb->count, NULL, &acb->ov);
226 if (!ret) {
227 qemu_aio_release(acb);
228 return NULL;
230 qemu_aio_release(acb);
231 return (BlockDriverAIOCB *)acb;
234 static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
235 int64_t sector_num, uint8_t *buf, int nb_sectors,
236 BlockDriverCompletionFunc *cb, void *opaque)
238 BDRVRawState *s = bs->opaque;
239 RawAIOCB *acb;
240 int ret;
242 acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
243 if (!acb)
244 return NULL;
245 ret = WriteFile(s->hfile, buf, acb->count, NULL, &acb->ov);
246 if (!ret) {
247 qemu_aio_release(acb);
248 return NULL;
250 qemu_aio_release(acb);
251 return (BlockDriverAIOCB *)acb;
254 static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
256 RawAIOCB *acb = (RawAIOCB *)blockacb;
257 BlockDriverState *bs = acb->common.bs;
258 BDRVRawState *s = bs->opaque;
260 qemu_del_wait_object(acb->ov.hEvent, raw_aio_cb, acb);
261 /* XXX: if more than one async I/O it is not correct */
262 CancelIo(s->hfile);
263 qemu_aio_release(acb);
265 #endif /* #if WIN32_AIO */
267 static void raw_flush(BlockDriverState *bs)
269 BDRVRawState *s = bs->opaque;
270 FlushFileBuffers(s->hfile);
273 static void raw_close(BlockDriverState *bs)
275 BDRVRawState *s = bs->opaque;
276 CloseHandle(s->hfile);
279 static int raw_truncate(BlockDriverState *bs, int64_t offset)
281 BDRVRawState *s = bs->opaque;
282 DWORD low, high;
284 low = offset;
285 high = offset >> 32;
286 if (!SetFilePointer(s->hfile, low, &high, FILE_BEGIN))
287 return -EIO;
288 if (!SetEndOfFile(s->hfile))
289 return -EIO;
290 return 0;
293 static int64_t raw_getlength(BlockDriverState *bs)
295 BDRVRawState *s = bs->opaque;
296 LARGE_INTEGER l;
297 ULARGE_INTEGER available, total, total_free;
298 DISK_GEOMETRY_EX dg;
299 DWORD count;
300 BOOL status;
302 switch(s->type) {
303 case FTYPE_FILE:
304 l.LowPart = GetFileSize(s->hfile, &l.HighPart);
305 if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
306 return -EIO;
307 break;
308 case FTYPE_CD:
309 if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free))
310 return -EIO;
311 l.QuadPart = total.QuadPart;
312 break;
313 case FTYPE_HARDDISK:
314 status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
315 NULL, 0, &dg, sizeof(dg), &count, NULL);
316 if (status != 0) {
317 l = dg.DiskSize;
319 break;
320 default:
321 return -EIO;
323 return l.QuadPart;
326 static int raw_create(const char *filename, int64_t total_size,
327 const char *backing_file, int flags)
329 int fd;
331 if (flags || backing_file)
332 return -ENOTSUP;
334 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
335 0644);
336 if (fd < 0)
337 return -EIO;
338 set_sparse(fd);
339 ftruncate(fd, total_size * 512);
340 close(fd);
341 return 0;
344 BlockDriver bdrv_raw = {
345 "raw",
346 sizeof(BDRVRawState),
347 NULL, /* no probe for protocols */
348 raw_open,
349 NULL,
350 NULL,
351 raw_close,
352 raw_create,
353 raw_flush,
355 #ifdef WIN32_AIO
356 .bdrv_aio_read = raw_aio_read,
357 .bdrv_aio_write = raw_aio_write,
358 .bdrv_aio_cancel = raw_aio_cancel,
359 .aiocb_size = sizeof(RawAIOCB);
360 #endif
361 .bdrv_pread = raw_pread,
362 .bdrv_pwrite = raw_pwrite,
363 .bdrv_truncate = raw_truncate,
364 .bdrv_getlength = raw_getlength,
367 /***********************************************/
368 /* host device */
370 static int find_cdrom(char *cdrom_name, int cdrom_name_size)
372 char drives[256], *pdrv = drives;
373 UINT type;
375 memset(drives, 0, sizeof(drives));
376 GetLogicalDriveStrings(sizeof(drives), drives);
377 while(pdrv[0] != '\0') {
378 type = GetDriveType(pdrv);
379 switch(type) {
380 case DRIVE_CDROM:
381 snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]);
382 return 0;
383 break;
385 pdrv += lstrlen(pdrv) + 1;
387 return -1;
390 static int find_device_type(BlockDriverState *bs, const char *filename)
392 BDRVRawState *s = bs->opaque;
393 UINT type;
394 const char *p;
396 if (strstart(filename, "\\\\.\\", &p) ||
397 strstart(filename, "//./", &p)) {
398 if (stristart(p, "PhysicalDrive", NULL))
399 return FTYPE_HARDDISK;
400 snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]);
401 type = GetDriveType(s->drive_path);
402 if (type == DRIVE_CDROM)
403 return FTYPE_CD;
404 else
405 return FTYPE_FILE;
406 } else {
407 return FTYPE_FILE;
411 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
413 BDRVRawState *s = bs->opaque;
414 int access_flags, create_flags;
415 DWORD overlapped;
416 char device_name[64];
418 if (strstart(filename, "/dev/cdrom", NULL)) {
419 if (find_cdrom(device_name, sizeof(device_name)) < 0)
420 return -ENOENT;
421 filename = device_name;
422 } else {
423 /* transform drive letters into device name */
424 if (((filename[0] >= 'a' && filename[0] <= 'z') ||
425 (filename[0] >= 'A' && filename[0] <= 'Z')) &&
426 filename[1] == ':' && filename[2] == '\0') {
427 snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]);
428 filename = device_name;
431 s->type = find_device_type(bs, filename);
433 if ((flags & BDRV_O_ACCESS) == O_RDWR) {
434 access_flags = GENERIC_READ | GENERIC_WRITE;
435 } else {
436 access_flags = GENERIC_READ;
438 create_flags = OPEN_EXISTING;
440 #ifdef WIN32_AIO
441 overlapped = FILE_FLAG_OVERLAPPED;
442 #else
443 overlapped = FILE_ATTRIBUTE_NORMAL;
444 #endif
445 if ((flags & BDRV_O_NOCACHE))
446 overlapped |= FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH;
447 else if (!(flags & BDRV_O_CACHE_WB))
448 overlapped |= FILE_FLAG_WRITE_THROUGH;
449 s->hfile = CreateFile(filename, access_flags,
450 FILE_SHARE_READ, NULL,
451 create_flags, overlapped, NULL);
452 if (s->hfile == INVALID_HANDLE_VALUE) {
453 int err = GetLastError();
455 if (err == ERROR_ACCESS_DENIED)
456 return -EACCES;
457 return -1;
459 return 0;
462 #if 0
463 /***********************************************/
464 /* removable device additional commands */
466 static int raw_is_inserted(BlockDriverState *bs)
468 return 1;
471 static int raw_media_changed(BlockDriverState *bs)
473 return -ENOTSUP;
476 static int raw_eject(BlockDriverState *bs, int eject_flag)
478 DWORD ret_count;
480 if (s->type == FTYPE_FILE)
481 return -ENOTSUP;
482 if (eject_flag) {
483 DeviceIoControl(s->hfile, IOCTL_STORAGE_EJECT_MEDIA,
484 NULL, 0, NULL, 0, &lpBytesReturned, NULL);
485 } else {
486 DeviceIoControl(s->hfile, IOCTL_STORAGE_LOAD_MEDIA,
487 NULL, 0, NULL, 0, &lpBytesReturned, NULL);
491 static int raw_set_locked(BlockDriverState *bs, int locked)
493 return -ENOTSUP;
495 #endif
497 BlockDriver bdrv_host_device = {
498 "host_device",
499 sizeof(BDRVRawState),
500 NULL, /* no probe for protocols */
501 hdev_open,
502 NULL,
503 NULL,
504 raw_close,
505 NULL,
506 raw_flush,
508 #ifdef WIN32_AIO
509 .bdrv_aio_read = raw_aio_read,
510 .bdrv_aio_write = raw_aio_write,
511 .bdrv_aio_cancel = raw_aio_cancel,
512 .aiocb_size = sizeof(RawAIOCB);
513 #endif
514 .bdrv_pread = raw_pread,
515 .bdrv_pwrite = raw_pwrite,
516 .bdrv_getlength = raw_getlength,