[mirror_qemu.git] / block-raw-win32.c

/*
 * Block driver for RAW files (win32)
 *
 * Copyright (c) 2006 Fabrice Bellard
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#include "qemu-common.h"
#ifndef QEMU_IMG
#include "qemu-timer.h"
#include "exec-all.h"
#endif
#include "block_int.h"
#include <assert.h>
#include <winioctl.h>

#define FTYPE_FILE 0
#define FTYPE_CD     1
#define FTYPE_HARDDISK 2

typedef struct BDRVRawState {
    HANDLE hfile;
    int type;
    char drive_path[16]; /* format: "d:\" */
} BDRVRawState;

typedef struct RawAIOCB {
    BlockDriverAIOCB common;
    HANDLE hEvent;
    OVERLAPPED ov;
    int count;
} RawAIOCB;

int qemu_ftruncate64(int fd, int64_t length)
{
    LARGE_INTEGER li;
    LONG high;
    HANDLE h;
    BOOL res;

    if ((GetVersion() & 0x80000000UL) && (length >> 32) != 0)
	return -1;

    h = (HANDLE)_get_osfhandle(fd);

    /* get current position, ftruncate do not change position */
    li.HighPart = 0;
    li.LowPart = SetFilePointer (h, 0, &li.HighPart, FILE_CURRENT);
    if (li.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
	return -1;

    high = length >> 32;
    if (!SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN))
	return -1;
    res = SetEndOfFile(h);

    /* back to old position */
    SetFilePointer(h, li.LowPart, &li.HighPart, FILE_BEGIN);
    return res ? 0 : -1;
}

static int set_sparse(int fd)
{
    DWORD returned;
    return (int) DeviceIoControl((HANDLE)_get_osfhandle(fd), FSCTL_SET_SPARSE,
				 NULL, 0, NULL, 0, &returned, NULL);
}

static int raw_open(BlockDriverState *bs, const char *filename, int flags)
{
    BDRVRawState *s = bs->opaque;
    int access_flags, create_flags;
    DWORD overlapped;

    s->type = FTYPE_FILE;

    if ((flags & BDRV_O_ACCESS) == O_RDWR) {
        access_flags = GENERIC_READ | GENERIC_WRITE;
    } else {
        access_flags = GENERIC_READ;
    }
    if (flags & BDRV_O_CREAT) {
        create_flags = CREATE_ALWAYS;
    } else {
        create_flags = OPEN_EXISTING;
    }
#ifdef QEMU_IMG
    overlapped = FILE_ATTRIBUTE_NORMAL;
#else
    overlapped = FILE_FLAG_OVERLAPPED;
#endif
    s->hfile = CreateFile(filename, access_flags,
                          FILE_SHARE_READ, NULL,
                          create_flags, overlapped, NULL);
    if (s->hfile == INVALID_HANDLE_VALUE) {
        int err = GetLastError();

        if (err == ERROR_ACCESS_DENIED)
            return -EACCES;
        return -1;
    }
    return 0;
}

static int raw_pread(BlockDriverState *bs, int64_t offset,
                     uint8_t *buf, int count)
{
    BDRVRawState *s = bs->opaque;
    OVERLAPPED ov;
    DWORD ret_count;
    int ret;

    memset(&ov, 0, sizeof(ov));
    ov.Offset = offset;
    ov.OffsetHigh = offset >> 32;
    ret = ReadFile(s->hfile, buf, count, &ret_count, &ov);
    if (!ret) {
        ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
        if (!ret)
            return -EIO;
        else
            return ret_count;
    }
    return ret_count;
}

static int raw_pwrite(BlockDriverState *bs, int64_t offset,
                      const uint8_t *buf, int count)
{
    BDRVRawState *s = bs->opaque;
    OVERLAPPED ov;
    DWORD ret_count;
    int ret;

    memset(&ov, 0, sizeof(ov));
    ov.Offset = offset;
    ov.OffsetHigh = offset >> 32;
    ret = WriteFile(s->hfile, buf, count, &ret_count, &ov);
    if (!ret) {
        ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
        if (!ret)
            return -EIO;
        else
            return ret_count;
    }
    return ret_count;
}

#if 0
#ifndef QEMU_IMG
static void raw_aio_cb(void *opaque)
{
    RawAIOCB *acb = opaque;
    BlockDriverState *bs = acb->common.bs;
    BDRVRawState *s = bs->opaque;
    DWORD ret_count;
    int ret;

    ret = GetOverlappedResult(s->hfile, &acb->ov, &ret_count, TRUE);
    if (!ret || ret_count != acb->count) {
        acb->common.cb(acb->common.opaque, -EIO);
    } else {
        acb->common.cb(acb->common.opaque, 0);
    }
}
#endif

static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
        int64_t sector_num, uint8_t *buf, int nb_sectors,
        BlockDriverCompletionFunc *cb, void *opaque)
{
    RawAIOCB *acb;
    int64_t offset;

    acb = qemu_aio_get(bs, cb, opaque);
    if (acb->hEvent) {
        acb->hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
        if (!acb->hEvent) {
            qemu_aio_release(acb);
            return NULL;
        }
    }
    memset(&acb->ov, 0, sizeof(acb->ov));
    offset = sector_num * 512;
    acb->ov.Offset = offset;
    acb->ov.OffsetHigh = offset >> 32;
    acb->ov.hEvent = acb->hEvent;
    acb->count = nb_sectors * 512;
#ifndef QEMU_IMG
    qemu_add_wait_object(acb->ov.hEvent, raw_aio_cb, acb);
#endif
    return acb;
}

static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
        int64_t sector_num, uint8_t *buf, int nb_sectors,
        BlockDriverCompletionFunc *cb, void *opaque)
{
    BDRVRawState *s = bs->opaque;
    RawAIOCB *acb;
    int ret;

    acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
    if (!acb)
        return NULL;
    ret = ReadFile(s->hfile, buf, acb->count, NULL, &acb->ov);
    if (!ret) {
        qemu_aio_release(acb);
        return NULL;
    }
#ifdef QEMU_IMG
    qemu_aio_release(acb);
#endif
    return (BlockDriverAIOCB *)acb;
}

static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
        int64_t sector_num, uint8_t *buf, int nb_sectors,
        BlockDriverCompletionFunc *cb, void *opaque)
{
    BDRVRawState *s = bs->opaque;
    RawAIOCB *acb;
    int ret;

    acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
    if (!acb)
        return NULL;
    ret = WriteFile(s->hfile, buf, acb->count, NULL, &acb->ov);
    if (!ret) {
        qemu_aio_release(acb);
        return NULL;
    }
#ifdef QEMU_IMG
    qemu_aio_release(acb);
#endif
    return (BlockDriverAIOCB *)acb;
}

static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
{
#ifndef QEMU_IMG
    RawAIOCB *acb = (RawAIOCB *)blockacb;
    BlockDriverState *bs = acb->common.bs;
    BDRVRawState *s = bs->opaque;

    qemu_del_wait_object(acb->ov.hEvent, raw_aio_cb, acb);
    /* XXX: if more than one async I/O it is not correct */
    CancelIo(s->hfile);
    qemu_aio_release(acb);
#endif
}
#endif /* #if 0 */

static void raw_flush(BlockDriverState *bs)
{
    BDRVRawState *s = bs->opaque;
    FlushFileBuffers(s->hfile);
}

static void raw_close(BlockDriverState *bs)
{
    BDRVRawState *s = bs->opaque;
    CloseHandle(s->hfile);
}

static int raw_truncate(BlockDriverState *bs, int64_t offset)
{
    BDRVRawState *s = bs->opaque;
    DWORD low, high;

    low = offset;
    high = offset >> 32;
    if (!SetFilePointer(s->hfile, low, &high, FILE_BEGIN))
	return -EIO;
    if (!SetEndOfFile(s->hfile))
        return -EIO;
    return 0;
}

static int64_t raw_getlength(BlockDriverState *bs)
{
    BDRVRawState *s = bs->opaque;
    LARGE_INTEGER l;
    ULARGE_INTEGER available, total, total_free;
    DISK_GEOMETRY_EX dg;
    DWORD count;
    BOOL status;

    switch(s->type) {
    case FTYPE_FILE:
        l.LowPart = GetFileSize(s->hfile, &l.HighPart);
        if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
            return -EIO;
        break;
    case FTYPE_CD:
        if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free))
            return -EIO;
        l.QuadPart = total.QuadPart;
        break;
    case FTYPE_HARDDISK:
        status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
                                 NULL, 0, &dg, sizeof(dg), &count, NULL);
        if (status != 0) {
            l = dg.DiskSize;
        }
        break;
    default:
        return -EIO;
    }
    return l.QuadPart;
}

static int raw_create(const char *filename, int64_t total_size,
                      const char *backing_file, int flags)
{
    int fd;

    if (flags || backing_file)
        return -ENOTSUP;

    fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
              0644);
    if (fd < 0)
        return -EIO;
    set_sparse(fd);
    ftruncate(fd, total_size * 512);
    close(fd);
    return 0;
}

void qemu_aio_init(void)
{
}

void qemu_aio_poll(void)
{
}

void qemu_aio_flush(void)
{
}

void qemu_aio_wait_start(void)
{
}

void qemu_aio_wait(void)
{
#ifndef QEMU_IMG
    qemu_bh_poll();
#endif
}

void qemu_aio_wait_end(void)
{
}

BlockDriver bdrv_raw = {
    "raw",
    sizeof(BDRVRawState),
    NULL, /* no probe for protocols */
    raw_open,
    NULL,
    NULL,
    raw_close,
    raw_create,
    raw_flush,

#if 0
    .bdrv_aio_read = raw_aio_read,
    .bdrv_aio_write = raw_aio_write,
    .bdrv_aio_cancel = raw_aio_cancel,
    .aiocb_size = sizeof(RawAIOCB);
#endif
    .protocol_name = "file",
    .bdrv_pread = raw_pread,
    .bdrv_pwrite = raw_pwrite,
    .bdrv_truncate = raw_truncate,
    .bdrv_getlength = raw_getlength,
};

/***********************************************/
/* host device */

static int find_cdrom(char *cdrom_name, int cdrom_name_size)
{
    char drives[256], *pdrv = drives;
    UINT type;

    memset(drives, 0, sizeof(drives));
    GetLogicalDriveStrings(sizeof(drives), drives);
    while(pdrv[0] != '\0') {
        type = GetDriveType(pdrv);
        switch(type) {
        case DRIVE_CDROM:
            snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]);
            return 0;
            break;
        }
        pdrv += lstrlen(pdrv) + 1;
    }
    return -1;
}

static int find_device_type(BlockDriverState *bs, const char *filename)
{
    BDRVRawState *s = bs->opaque;
    UINT type;
    const char *p;

    if (strstart(filename, "\\\\.\\", &p) ||
        strstart(filename, "//./", &p)) {
        if (stristart(p, "PhysicalDrive", NULL))
            return FTYPE_HARDDISK;
        snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]);
        type = GetDriveType(s->drive_path);
        if (type == DRIVE_CDROM)
            return FTYPE_CD;
        else
            return FTYPE_FILE;
    } else {
        return FTYPE_FILE;
    }
}

static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
{
    BDRVRawState *s = bs->opaque;
    int access_flags, create_flags;
    DWORD overlapped;
    char device_name[64];

    if (strstart(filename, "/dev/cdrom", NULL)) {
        if (find_cdrom(device_name, sizeof(device_name)) < 0)
            return -ENOENT;
        filename = device_name;
    } else {
        /* transform drive letters into device name */
        if (((filename[0] >= 'a' && filename[0] <= 'z') ||
             (filename[0] >= 'A' && filename[0] <= 'Z')) &&
            filename[1] == ':' && filename[2] == '\0') {
            snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]);
            filename = device_name;
        }
    }
    s->type = find_device_type(bs, filename);

    if ((flags & BDRV_O_ACCESS) == O_RDWR) {
        access_flags = GENERIC_READ | GENERIC_WRITE;
    } else {
        access_flags = GENERIC_READ;
    }
    create_flags = OPEN_EXISTING;

#ifdef QEMU_IMG
    overlapped = FILE_ATTRIBUTE_NORMAL;
#else
    overlapped = FILE_FLAG_OVERLAPPED;
#endif
    s->hfile = CreateFile(filename, access_flags,
                          FILE_SHARE_READ, NULL,
                          create_flags, overlapped, NULL);
    if (s->hfile == INVALID_HANDLE_VALUE) {
        int err = GetLastError();

        if (err == ERROR_ACCESS_DENIED)
            return -EACCES;
        return -1;
    }
    return 0;
}

#if 0
/***********************************************/
/* removable device additional commands */

static int raw_is_inserted(BlockDriverState *bs)
{
    return 1;
}

static int raw_media_changed(BlockDriverState *bs)
{
    return -ENOTSUP;
}

static int raw_eject(BlockDriverState *bs, int eject_flag)
{
    DWORD ret_count;

    if (s->type == FTYPE_FILE)
        return -ENOTSUP;
    if (eject_flag) {
        DeviceIoControl(s->hfile, IOCTL_STORAGE_EJECT_MEDIA,
                        NULL, 0, NULL, 0, &lpBytesReturned, NULL);
    } else {
        DeviceIoControl(s->hfile, IOCTL_STORAGE_LOAD_MEDIA,
                        NULL, 0, NULL, 0, &lpBytesReturned, NULL);
    }
}

static int raw_set_locked(BlockDriverState *bs, int locked)
{
    return -ENOTSUP;
}
#endif

BlockDriver bdrv_host_device = {
    "host_device",
    sizeof(BDRVRawState),
    NULL, /* no probe for protocols */
    hdev_open,
    NULL,
    NULL,
    raw_close,
    NULL,
    raw_flush,

#if 0
    .bdrv_aio_read = raw_aio_read,
    .bdrv_aio_write = raw_aio_write,
    .bdrv_aio_cancel = raw_aio_cancel,
    .aiocb_size = sizeof(RawAIOCB);
#endif
    .bdrv_pread = raw_pread,
    .bdrv_pwrite = raw_pwrite,
    .bdrv_getlength = raw_getlength,
};
Commit	Line	Data
223d4670 TS	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	#ifndef QEMU_IMG
	26	#include "qemu-timer.h"
	27	#include "exec-all.h"
	28	#endif
	29	#include "block_int.h"
	30	#include <assert.h>
	31	#include <winioctl.h>
	32
	33	#define FTYPE_FILE 0
	34	#define FTYPE_CD 1
	35	#define FTYPE_HARDDISK 2
	36
	37	typedef struct BDRVRawState {
	38	HANDLE hfile;
	39	int type;
	40	char drive_path[16]; /* format: "d:\" */
	41	} BDRVRawState;
	42
	43	typedef struct RawAIOCB {
	44	BlockDriverAIOCB common;
	45	HANDLE hEvent;
	46	OVERLAPPED ov;
	47	int count;
	48	} RawAIOCB;
	49
	50	int qemu_ftruncate64(int fd, int64_t length)
	51	{
	52	LARGE_INTEGER li;
	53	LONG high;
	54	HANDLE h;
	55	BOOL res;
	56
	57	if ((GetVersion() & 0x80000000UL) && (length >> 32) != 0)
	58	return -1;
	59
	60	h = (HANDLE)_get_osfhandle(fd);
	61
	62	/* get current position, ftruncate do not change position */
	63	li.HighPart = 0;
	64	li.LowPart = SetFilePointer (h, 0, &li.HighPart, FILE_CURRENT);
65	if (li.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
66	return -1;
67
68	high = length >> 32;
69	if (!SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN))
70	return -1;
71	res = SetEndOfFile(h);
72
73	/* back to old position */
74	SetFilePointer(h, li.LowPart, &li.HighPart, FILE_BEGIN);
75	return res ? 0 : -1;
76	}
77
78	static int set_sparse(int fd)
79	{
80	DWORD returned;
81	return (int) DeviceIoControl((HANDLE)_get_osfhandle(fd), FSCTL_SET_SPARSE,
82	NULL, 0, NULL, 0, &returned, NULL);
83	}
84
85	static int raw_open(BlockDriverState bs, const char filename, int flags)
86	{
87	BDRVRawState *s = bs->opaque;
88	int access_flags, create_flags;
89	DWORD overlapped;
90
91	s->type = FTYPE_FILE;
92
93	if ((flags & BDRV_O_ACCESS) == O_RDWR) {
94	access_flags = GENERIC_READ \| GENERIC_WRITE;
95	} else {
96	access_flags = GENERIC_READ;
97	}
98	if (flags & BDRV_O_CREAT) {
99	create_flags = CREATE_ALWAYS;
100	} else {
101	create_flags = OPEN_EXISTING;
102	}
103	#ifdef QEMU_IMG
104	overlapped = FILE_ATTRIBUTE_NORMAL;
105	#else
106	overlapped = FILE_FLAG_OVERLAPPED;
107	#endif
108	s->hfile = CreateFile(filename, access_flags,
109	FILE_SHARE_READ, NULL,
110	create_flags, overlapped, NULL);
111	if (s->hfile == INVALID_HANDLE_VALUE) {
112	int err = GetLastError();
113
114	if (err == ERROR_ACCESS_DENIED)
115	return -EACCES;
116	return -1;
117	}
118	return 0;
119	}
120
121	static int raw_pread(BlockDriverState *bs, int64_t offset,
122	uint8_t *buf, int count)
123	{
124	BDRVRawState *s = bs->opaque;
125	OVERLAPPED ov;
126	DWORD ret_count;
127	int ret;
128
129	memset(&ov, 0, sizeof(ov));
130	ov.Offset = offset;
131	ov.OffsetHigh = offset >> 32;
132	ret = ReadFile(s->hfile, buf, count, &ret_count, &ov);
133	if (!ret) {
134	ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
135	if (!ret)
136	return -EIO;
137	else
138	return ret_count;
139	}
140	return ret_count;
141	}
142
143	static int raw_pwrite(BlockDriverState *bs, int64_t offset,
144	const uint8_t *buf, int count)
145	{
146	BDRVRawState *s = bs->opaque;
147	OVERLAPPED ov;
148	DWORD ret_count;
149	int ret;
150
151	memset(&ov, 0, sizeof(ov));
152	ov.Offset = offset;
153	ov.OffsetHigh = offset >> 32;
154	ret = WriteFile(s->hfile, buf, count, &ret_count, &ov);
155	if (!ret) {
156	ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
157	if (!ret)
158	return -EIO;
159	else
160	return ret_count;
161	}
162	return ret_count;
163	}
164
165	#if 0
166	#ifndef QEMU_IMG
167	static void raw_aio_cb(void *opaque)
168	{
169	RawAIOCB *acb = opaque;
170	BlockDriverState *bs = acb->common.bs;
171	BDRVRawState *s = bs->opaque;
172	DWORD ret_count;
173	int ret;
174
175	ret = GetOverlappedResult(s->hfile, &acb->ov, &ret_count, TRUE);
176	if (!ret \|\| ret_count != acb->count) {
177	acb->common.cb(acb->common.opaque, -EIO);
178	} else {
179	acb->common.cb(acb->common.opaque, 0);
180	}
181	}
182	#endif
183
184	static RawAIOCB raw_aio_setup(BlockDriverState bs,
185	int64_t sector_num, uint8_t *buf, int nb_sectors,
186	BlockDriverCompletionFunc cb, void opaque)
187	{
188	RawAIOCB *acb;
189	int64_t offset;
190
191	acb = qemu_aio_get(bs, cb, opaque);
192	if (acb->hEvent) {
193	acb->hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
194	if (!acb->hEvent) {
195	qemu_aio_release(acb);
196	return NULL;
197	}
198	}
199	memset(&acb->ov, 0, sizeof(acb->ov));
200	offset = sector_num * 512;
201	acb->ov.Offset = offset;
202	acb->ov.OffsetHigh = offset >> 32;
203	acb->ov.hEvent = acb->hEvent;
204	acb->count = nb_sectors * 512;
205	#ifndef QEMU_IMG
206	qemu_add_wait_object(acb->ov.hEvent, raw_aio_cb, acb);
207	#endif
208	return acb;
209	}
210
211	static BlockDriverAIOCB raw_aio_read(BlockDriverState bs,
212	int64_t sector_num, uint8_t *buf, int nb_sectors,
213	BlockDriverCompletionFunc cb, void opaque)
214	{
215	BDRVRawState *s = bs->opaque;
216	RawAIOCB *acb;
217	int ret;
218
219	acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
220	if (!acb)
221	return NULL;
222	ret = ReadFile(s->hfile, buf, acb->count, NULL, &acb->ov);
223	if (!ret) {
224	qemu_aio_release(acb);
225	return NULL;
226	}
227	#ifdef QEMU_IMG
228	qemu_aio_release(acb);
229	#endif
230	return (BlockDriverAIOCB *)acb;
231	}
232
233	static BlockDriverAIOCB raw_aio_write(BlockDriverState bs,
234	int64_t sector_num, uint8_t *buf, int nb_sectors,
235	BlockDriverCompletionFunc cb, void opaque)
236	{
237	BDRVRawState *s = bs->opaque;
238	RawAIOCB *acb;
239	int ret;
240
241	acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
242	if (!acb)
243	return NULL;
244	ret = WriteFile(s->hfile, buf, acb->count, NULL, &acb->ov);
245	if (!ret) {
246	qemu_aio_release(acb);
247	return NULL;
248	}
249	#ifdef QEMU_IMG
250	qemu_aio_release(acb);
251	#endif
252	return (BlockDriverAIOCB *)acb;
253	}
254
255	static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
256	{
257	#ifndef QEMU_IMG
258	RawAIOCB acb = (RawAIOCB )blockacb;
259	BlockDriverState *bs = acb->common.bs;
260	BDRVRawState *s = bs->opaque;
261
262	qemu_del_wait_object(acb->ov.hEvent, raw_aio_cb, acb);
263	/* XXX: if more than one async I/O it is not correct */
264	CancelIo(s->hfile);
265	qemu_aio_release(acb);
266	#endif
267	}
268	#endif /* #if 0 */
269
270	static void raw_flush(BlockDriverState *bs)
271	{
272	BDRVRawState *s = bs->opaque;
273	FlushFileBuffers(s->hfile);
274	}
275
276	static void raw_close(BlockDriverState *bs)
277	{
278	BDRVRawState *s = bs->opaque;
279	CloseHandle(s->hfile);
280	}
281
282	static int raw_truncate(BlockDriverState *bs, int64_t offset)
283	{
284	BDRVRawState *s = bs->opaque;
285	DWORD low, high;
286
287	low = offset;
288	high = offset >> 32;
289	if (!SetFilePointer(s->hfile, low, &high, FILE_BEGIN))
290	return -EIO;
291	if (!SetEndOfFile(s->hfile))
292	return -EIO;
293	return 0;
294	}
295
296	static int64_t raw_getlength(BlockDriverState *bs)
297	{
298	BDRVRawState *s = bs->opaque;
299	LARGE_INTEGER l;
300	ULARGE_INTEGER available, total, total_free;
301	DISK_GEOMETRY_EX dg;
302	DWORD count;
303	BOOL status;
304
305	switch(s->type) {
306	case FTYPE_FILE:
307	l.LowPart = GetFileSize(s->hfile, &l.HighPart);
308	if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
309	return -EIO;
310	break;
311	case FTYPE_CD:
312	if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free))
313	return -EIO;
314	l.QuadPart = total.QuadPart;
315	break;
316	case FTYPE_HARDDISK:
317	status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
318	NULL, 0, &dg, sizeof(dg), &count, NULL);
319	if (status != 0) {
320	l = dg.DiskSize;
321	}
322	break;
323	default:
324	return -EIO;
325	}
326	return l.QuadPart;
327	}
328
329	static int raw_create(const char *filename, int64_t total_size,
330	const char *backing_file, int flags)
331	{
332	int fd;
333
334	if (flags \|\| backing_file)
335	return -ENOTSUP;
336
337	fd = open(filename, O_WRONLY \| O_CREAT \| O_TRUNC \| O_BINARY,
338	0644);
339	if (fd < 0)
340	return -EIO;
341	set_sparse(fd);
342	ftruncate(fd, total_size * 512);
343	close(fd);
344	return 0;
345	}
346
347	void qemu_aio_init(void)
348	{
349	}
350
351	void qemu_aio_poll(void)
352	{
353	}
354
355	void qemu_aio_flush(void)
356	{
357	}
358
359	void qemu_aio_wait_start(void)
360	{
361	}
362
363	void qemu_aio_wait(void)
364	{
365	#ifndef QEMU_IMG
366	qemu_bh_poll();
367	#endif
368	}
369
370	void qemu_aio_wait_end(void)
371	{
372	}
373
374	BlockDriver bdrv_raw = {
375	"raw",
376	sizeof(BDRVRawState),
377	NULL, /* no probe for protocols */
378	raw_open,
379	NULL,
380	NULL,
381	raw_close,
382	raw_create,
383	raw_flush,
384
385	#if 0
386	.bdrv_aio_read = raw_aio_read,
387	.bdrv_aio_write = raw_aio_write,
388	.bdrv_aio_cancel = raw_aio_cancel,
389	.aiocb_size = sizeof(RawAIOCB);
390	#endif
391	.protocol_name = "file",
392	.bdrv_pread = raw_pread,
393	.bdrv_pwrite = raw_pwrite,
394	.bdrv_truncate = raw_truncate,
395	.bdrv_getlength = raw_getlength,
396	};
397
398	/***********************************************/
399	/* host device */
400
401	static int find_cdrom(char *cdrom_name, int cdrom_name_size)
402	{
403	char drives[256], *pdrv = drives;
404	UINT type;
405
406	memset(drives, 0, sizeof(drives));
407	GetLogicalDriveStrings(sizeof(drives), drives);
408	while(pdrv[0] != '\0') {
409	type = GetDriveType(pdrv);
410	switch(type) {
411	case DRIVE_CDROM:
412	snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]);
413	return 0;
414	break;
415	}
416	pdrv += lstrlen(pdrv) + 1;
417	}
418	return -1;
419	}
420
421	static int find_device_type(BlockDriverState bs, const char filename)
422	{
423	BDRVRawState *s = bs->opaque;
424	UINT type;
425	const char *p;
426
427	if (strstart(filename, "\\\\.\\", &p) \|\|
428	strstart(filename, "//./", &p)) {
429	if (stristart(p, "PhysicalDrive", NULL))
430	return FTYPE_HARDDISK;
431	snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]);
432	type = GetDriveType(s->drive_path);
433	if (type == DRIVE_CDROM)
434	return FTYPE_CD;
435	else
436	return FTYPE_FILE;
437	} else {
438	return FTYPE_FILE;
439	}
440	}
441
442	static int hdev_open(BlockDriverState bs, const char filename, int flags)
443	{
444	BDRVRawState *s = bs->opaque;
445	int access_flags, create_flags;
446	DWORD overlapped;
447	char device_name[64];
448
449	if (strstart(filename, "/dev/cdrom", NULL)) {
450	if (find_cdrom(device_name, sizeof(device_name)) < 0)
451	return -ENOENT;
452	filename = device_name;
453	} else {
454	/* transform drive letters into device name */
455	if (((filename[0] >= 'a' && filename[0] <= 'z') \|\|
456	(filename[0] >= 'A' && filename[0] <= 'Z')) &&
457	filename[1] == ':' && filename[2] == '\0') {
458	snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]);
459	filename = device_name;
460	}
461	}
462	s->type = find_device_type(bs, filename);
463
464	if ((flags & BDRV_O_ACCESS) == O_RDWR) {
465	access_flags = GENERIC_READ \| GENERIC_WRITE;
466	} else {
467	access_flags = GENERIC_READ;
468	}
469	create_flags = OPEN_EXISTING;
470
471	#ifdef QEMU_IMG
472	overlapped = FILE_ATTRIBUTE_NORMAL;
473	#else
474	overlapped = FILE_FLAG_OVERLAPPED;
475	#endif
476	s->hfile = CreateFile(filename, access_flags,
477	FILE_SHARE_READ, NULL,
478	create_flags, overlapped, NULL);
479	if (s->hfile == INVALID_HANDLE_VALUE) {
480	int err = GetLastError();
481
482	if (err == ERROR_ACCESS_DENIED)
483	return -EACCES;
484	return -1;
485	}
486	return 0;
487	}
488
489	#if 0
490	/***********************************************/
491	/* removable device additional commands */
492
493	static int raw_is_inserted(BlockDriverState *bs)
494	{
495	return 1;
496	}
497
498	static int raw_media_changed(BlockDriverState *bs)
499	{
500	return -ENOTSUP;
501	}
502
503	static int raw_eject(BlockDriverState *bs, int eject_flag)
504	{
505	DWORD ret_count;
506
507	if (s->type == FTYPE_FILE)
508	return -ENOTSUP;
509	if (eject_flag) {
510	DeviceIoControl(s->hfile, IOCTL_STORAGE_EJECT_MEDIA,
511	NULL, 0, NULL, 0, &lpBytesReturned, NULL);
512	} else {
513	DeviceIoControl(s->hfile, IOCTL_STORAGE_LOAD_MEDIA,
514	NULL, 0, NULL, 0, &lpBytesReturned, NULL);
515	}
516	}
517
518	static int raw_set_locked(BlockDriverState *bs, int locked)
519	{
520	return -ENOTSUP;
521	}
522	#endif
523
524	BlockDriver bdrv_host_device = {
525	"host_device",
526	sizeof(BDRVRawState),
527	NULL, /* no probe for protocols */
528	hdev_open,
529	NULL,
530	NULL,
531	raw_close,
532	NULL,
533	raw_flush,
534
535	#if 0
536	.bdrv_aio_read = raw_aio_read,
537	.bdrv_aio_write = raw_aio_write,
538	.bdrv_aio_cancel = raw_aio_cancel,
539	.aiocb_size = sizeof(RawAIOCB);
540	#endif
541	.bdrv_pread = raw_pread,
542	.bdrv_pwrite = raw_pwrite,
543	.bdrv_getlength = raw_getlength,
544	};