[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"
#include "qemu-timer.h"
#include "block_int.h"
#include <assert.h>
#include <winioctl.h>

//#define WIN32_AIO

#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 WIN32_AIO
    overlapped = FILE_FLAG_OVERLAPPED;
#else
    overlapped = FILE_ATTRIBUTE_NORMAL;
#endif
    if (flags & BDRV_O_DIRECT)
        overlapped |= FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH;
    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) {
#ifdef WIN32_AIO
        ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
        if (!ret)
            return -EIO;
        else
#endif
            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) {
#ifdef WIN32_AIO
        ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
        if (!ret)
            return -EIO;
        else
#endif
            return ret_count;
    }
    return ret_count;
}

#ifdef WIN32_AIO
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);
    }
}

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;
    qemu_add_wait_object(acb->ov.hEvent, raw_aio_cb, acb);
    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;
    }
    qemu_aio_release(acb);
    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;
    }
    qemu_aio_release(acb);
    return (BlockDriverAIOCB *)acb;
}

static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
{
    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 /* #if WIN32_AIO */

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;
}

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

#ifdef WIN32_AIO
    .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_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 WIN32_AIO
    overlapped = FILE_FLAG_OVERLAPPED;
#else
    overlapped = FILE_ATTRIBUTE_NORMAL;
#endif
    if (flags & BDRV_O_DIRECT)
        overlapped |= FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH;
    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,

#ifdef WIN32_AIO
    .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"
223d4670	25	#include "qemu-timer.h"
223d4670 TS	26	#include "block_int.h"
	27	#include <assert.h>
	28	#include <winioctl.h>
	29
03ff3ca3 AL	30	//#define WIN32_AIO
03ff3ca3 AL	31
223d4670 TS	32	#define FTYPE_FILE 0
	33	#define FTYPE_CD 1
	34	#define FTYPE_HARDDISK 2
	35
	36	typedef struct BDRVRawState {
	37	HANDLE hfile;
	38	int type;
	39	char drive_path[16]; /* format: "d:\" */
	40	} BDRVRawState;
	41
	42	typedef struct RawAIOCB {
	43	BlockDriverAIOCB common;
	44	HANDLE hEvent;
	45	OVERLAPPED ov;
	46	int count;
	47	} RawAIOCB;
	48
	49	int qemu_ftruncate64(int fd, int64_t length)
	50	{
	51	LARGE_INTEGER li;
	52	LONG high;
	53	HANDLE h;
	54	BOOL res;
	55
	56	if ((GetVersion() & 0x80000000UL) && (length >> 32) != 0)
	57	return -1;
	58
	59	h = (HANDLE)_get_osfhandle(fd);
	60
	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;
	66
	67	high = length >> 32;
	68	if (!SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN))
	69	return -1;
	70	res = SetEndOfFile(h);
	71
	72	/* back to old position */
	73	SetFilePointer(h, li.LowPart, &li.HighPart, FILE_BEGIN);
	74	return res ? 0 : -1;
	75	}
	76
	77	static int set_sparse(int fd)
	78	{
	79	DWORD returned;
	80	return (int) DeviceIoControl((HANDLE)_get_osfhandle(fd), FSCTL_SET_SPARSE,
	81	NULL, 0, NULL, 0, &returned, NULL);
	82	}
	83
	84	static int raw_open(BlockDriverState bs, const char filename, int flags)
	85	{
	86	BDRVRawState *s = bs->opaque;
	87	int access_flags, create_flags;
	88	DWORD overlapped;
	89
	90	s->type = FTYPE_FILE;
	91
	92	if ((flags & BDRV_O_ACCESS) == O_RDWR) {
	93	access_flags = GENERIC_READ \| GENERIC_WRITE;
	94	} else {
	95	access_flags = GENERIC_READ;
96	}
97	if (flags & BDRV_O_CREAT) {
98	create_flags = CREATE_ALWAYS;
99	} else {
100	create_flags = OPEN_EXISTING;
101	}
03ff3ca3	102	#ifdef WIN32_AIO
223d4670	103	overlapped = FILE_FLAG_OVERLAPPED;
03ff3ca3 AL	104	#else
03ff3ca3 AL	105	overlapped = FILE_ATTRIBUTE_NORMAL;
223d4670	106	#endif
33f00271 AZ	107	if (flags & BDRV_O_DIRECT)
33f00271 AZ	108	overlapped \|= FILE_FLAG_NO_BUFFERING \| FILE_FLAG_WRITE_THROUGH;
223d4670 TS	109	s->hfile = CreateFile(filename, access_flags,
	110	FILE_SHARE_READ, NULL,
	111	create_flags, overlapped, NULL);
	112	if (s->hfile == INVALID_HANDLE_VALUE) {
	113	int err = GetLastError();
	114
	115	if (err == ERROR_ACCESS_DENIED)
	116	return -EACCES;
	117	return -1;
	118	}
	119	return 0;
	120	}
	121
	122	static int raw_pread(BlockDriverState *bs, int64_t offset,
	123	uint8_t *buf, int count)
	124	{
	125	BDRVRawState *s = bs->opaque;
	126	OVERLAPPED ov;
	127	DWORD ret_count;
	128	int ret;
	129
	130	memset(&ov, 0, sizeof(ov));
	131	ov.Offset = offset;
	132	ov.OffsetHigh = offset >> 32;
	133	ret = ReadFile(s->hfile, buf, count, &ret_count, &ov);
	134	if (!ret) {
03ff3ca3	135	#ifdef WIN32_AIO
223d4670 TS	136	ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
	137	if (!ret)
	138	return -EIO;
	139	else
03ff3ca3	140	#endif
223d4670 TS	141	return ret_count;
	142	}
	143	return ret_count;
	144	}
	145
	146	static int raw_pwrite(BlockDriverState *bs, int64_t offset,
	147	const uint8_t *buf, int count)
	148	{
	149	BDRVRawState *s = bs->opaque;
	150	OVERLAPPED ov;
	151	DWORD ret_count;
	152	int ret;
	153
	154	memset(&ov, 0, sizeof(ov));
	155	ov.Offset = offset;
	156	ov.OffsetHigh = offset >> 32;
	157	ret = WriteFile(s->hfile, buf, count, &ret_count, &ov);
	158	if (!ret) {
03ff3ca3	159	#ifdef WIN32_AIO
223d4670 TS	160	ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
	161	if (!ret)
	162	return -EIO;
	163	else
03ff3ca3	164	#endif
223d4670 TS	165	return ret_count;
	166	}
	167	return ret_count;
	168	}
	169
03ff3ca3	170	#ifdef WIN32_AIO
223d4670 TS	171	static void raw_aio_cb(void *opaque)
	172	{
	173	RawAIOCB *acb = opaque;
	174	BlockDriverState *bs = acb->common.bs;
	175	BDRVRawState *s = bs->opaque;
	176	DWORD ret_count;
	177	int ret;
	178
	179	ret = GetOverlappedResult(s->hfile, &acb->ov, &ret_count, TRUE);
	180	if (!ret \|\| ret_count != acb->count) {
	181	acb->common.cb(acb->common.opaque, -EIO);
	182	} else {
	183	acb->common.cb(acb->common.opaque, 0);
	184	}
	185	}
223d4670 TS	186
	187	static RawAIOCB raw_aio_setup(BlockDriverState bs,
	188	int64_t sector_num, uint8_t *buf, int nb_sectors,
	189	BlockDriverCompletionFunc cb, void opaque)
	190	{
	191	RawAIOCB *acb;
	192	int64_t offset;
	193
	194	acb = qemu_aio_get(bs, cb, opaque);
	195	if (acb->hEvent) {
	196	acb->hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
	197	if (!acb->hEvent) {
	198	qemu_aio_release(acb);
	199	return NULL;
	200	}
	201	}
	202	memset(&acb->ov, 0, sizeof(acb->ov));
	203	offset = sector_num * 512;
	204	acb->ov.Offset = offset;
	205	acb->ov.OffsetHigh = offset >> 32;
	206	acb->ov.hEvent = acb->hEvent;
	207	acb->count = nb_sectors * 512;
223d4670	208	qemu_add_wait_object(acb->ov.hEvent, raw_aio_cb, acb);
223d4670 TS	209	return acb;
	210	}
	211
	212	static BlockDriverAIOCB raw_aio_read(BlockDriverState bs,
	213	int64_t sector_num, uint8_t *buf, int nb_sectors,
	214	BlockDriverCompletionFunc cb, void opaque)
	215	{
	216	BDRVRawState *s = bs->opaque;
	217	RawAIOCB *acb;
	218	int ret;
	219
	220	acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
	221	if (!acb)
	222	return NULL;
	223	ret = ReadFile(s->hfile, buf, acb->count, NULL, &acb->ov);
	224	if (!ret) {
	225	qemu_aio_release(acb);
	226	return NULL;
	227	}
223d4670	228	qemu_aio_release(acb);
223d4670 TS	229	return (BlockDriverAIOCB *)acb;
	230	}
	231
	232	static BlockDriverAIOCB raw_aio_write(BlockDriverState bs,
	233	int64_t sector_num, uint8_t *buf, int nb_sectors,
	234	BlockDriverCompletionFunc cb, void opaque)
	235	{
	236	BDRVRawState *s = bs->opaque;
	237	RawAIOCB *acb;
	238	int ret;
	239
	240	acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
	241	if (!acb)
	242	return NULL;
	243	ret = WriteFile(s->hfile, buf, acb->count, NULL, &acb->ov);
	244	if (!ret) {
	245	qemu_aio_release(acb);
	246	return NULL;
	247	}
223d4670	248	qemu_aio_release(acb);
223d4670 TS	249	return (BlockDriverAIOCB *)acb;
	250	}
	251
	252	static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
	253	{
223d4670 TS	254	RawAIOCB acb = (RawAIOCB )blockacb;
	255	BlockDriverState *bs = acb->common.bs;
	256	BDRVRawState *s = bs->opaque;
	257
	258	qemu_del_wait_object(acb->ov.hEvent, raw_aio_cb, acb);
	259	/* XXX: if more than one async I/O it is not correct */
	260	CancelIo(s->hfile);
	261	qemu_aio_release(acb);
223d4670	262	}
03ff3ca3	263	#endif /* #if WIN32_AIO */
223d4670 TS	264
	265	static void raw_flush(BlockDriverState *bs)
	266	{
	267	BDRVRawState *s = bs->opaque;
	268	FlushFileBuffers(s->hfile);
	269	}
	270
	271	static void raw_close(BlockDriverState *bs)
	272	{
	273	BDRVRawState *s = bs->opaque;
	274	CloseHandle(s->hfile);
	275	}
	276
	277	static int raw_truncate(BlockDriverState *bs, int64_t offset)
	278	{
	279	BDRVRawState *s = bs->opaque;
	280	DWORD low, high;
	281
	282	low = offset;
	283	high = offset >> 32;
	284	if (!SetFilePointer(s->hfile, low, &high, FILE_BEGIN))
	285	return -EIO;
	286	if (!SetEndOfFile(s->hfile))
	287	return -EIO;
	288	return 0;
	289	}
	290
	291	static int64_t raw_getlength(BlockDriverState *bs)
	292	{
	293	BDRVRawState *s = bs->opaque;
	294	LARGE_INTEGER l;
	295	ULARGE_INTEGER available, total, total_free;
	296	DISK_GEOMETRY_EX dg;
	297	DWORD count;
	298	BOOL status;
	299
	300	switch(s->type) {
	301	case FTYPE_FILE:
	302	l.LowPart = GetFileSize(s->hfile, &l.HighPart);
	303	if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
	304	return -EIO;
	305	break;
	306	case FTYPE_CD:
	307	if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free))
	308	return -EIO;
	309	l.QuadPart = total.QuadPart;
	310	break;
	311	case FTYPE_HARDDISK:
	312	status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
	313	NULL, 0, &dg, sizeof(dg), &count, NULL);
	314	if (status != 0) {
	315	l = dg.DiskSize;
	316	}
	317	break;
	318	default:
	319	return -EIO;
	320	}
	321	return l.QuadPart;
	322	}
	323
	324	static int raw_create(const char *filename, int64_t total_size,
	325	const char *backing_file, int flags)
	326	{
	327	int fd;
328
329	if (flags \|\| backing_file)
330	return -ENOTSUP;
331
332	fd = open(filename, O_WRONLY \| O_CREAT \| O_TRUNC \| O_BINARY,
333	0644);
334	if (fd < 0)
335	return -EIO;
336	set_sparse(fd);
337	ftruncate(fd, total_size * 512);
338	close(fd);
339	return 0;
340	}
341
223d4670 TS	342	BlockDriver bdrv_raw = {
	343	"raw",
	344	sizeof(BDRVRawState),
	345	NULL, /* no probe for protocols */
	346	raw_open,
	347	NULL,
	348	NULL,
	349	raw_close,
	350	raw_create,
	351	raw_flush,
	352
03ff3ca3	353	#ifdef WIN32_AIO
223d4670 TS	354	.bdrv_aio_read = raw_aio_read,
	355	.bdrv_aio_write = raw_aio_write,
	356	.bdrv_aio_cancel = raw_aio_cancel,
	357	.aiocb_size = sizeof(RawAIOCB);
	358	#endif
223d4670 TS	359	.bdrv_pread = raw_pread,
	360	.bdrv_pwrite = raw_pwrite,
	361	.bdrv_truncate = raw_truncate,
	362	.bdrv_getlength = raw_getlength,
	363	};
	364
	365	/***********************************************/
	366	/* host device */
	367
	368	static int find_cdrom(char *cdrom_name, int cdrom_name_size)
	369	{
	370	char drives[256], *pdrv = drives;
	371	UINT type;
	372
	373	memset(drives, 0, sizeof(drives));
	374	GetLogicalDriveStrings(sizeof(drives), drives);
	375	while(pdrv[0] != '\0') {
	376	type = GetDriveType(pdrv);
	377	switch(type) {
	378	case DRIVE_CDROM:
	379	snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]);
	380	return 0;
	381	break;
	382	}
	383	pdrv += lstrlen(pdrv) + 1;
	384	}
	385	return -1;
	386	}
	387
	388	static int find_device_type(BlockDriverState bs, const char filename)
	389	{
	390	BDRVRawState *s = bs->opaque;
	391	UINT type;
	392	const char *p;
	393
	394	if (strstart(filename, "\\\\.\\", &p) \|\|
	395	strstart(filename, "//./", &p)) {
	396	if (stristart(p, "PhysicalDrive", NULL))
	397	return FTYPE_HARDDISK;
	398	snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]);
	399	type = GetDriveType(s->drive_path);
	400	if (type == DRIVE_CDROM)
	401	return FTYPE_CD;
	402	else
	403	return FTYPE_FILE;
	404	} else {
	405	return FTYPE_FILE;
	406	}
	407	}
	408
	409	static int hdev_open(BlockDriverState bs, const char filename, int flags)
	410	{
	411	BDRVRawState *s = bs->opaque;
	412	int access_flags, create_flags;
	413	DWORD overlapped;
	414	char device_name[64];
	415
	416	if (strstart(filename, "/dev/cdrom", NULL)) {
	417	if (find_cdrom(device_name, sizeof(device_name)) < 0)
	418	return -ENOENT;
	419	filename = device_name;
	420	} else {
	421	/* transform drive letters into device name */
	422	if (((filename[0] >= 'a' && filename[0] <= 'z') \|\|
423	(filename[0] >= 'A' && filename[0] <= 'Z')) &&
424	filename[1] == ':' && filename[2] == '\0') {
425	snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]);
426	filename = device_name;
427	}
428	}
429	s->type = find_device_type(bs, filename);
430
431	if ((flags & BDRV_O_ACCESS) == O_RDWR) {
432	access_flags = GENERIC_READ \| GENERIC_WRITE;
433	} else {
434	access_flags = GENERIC_READ;
435	}
436	create_flags = OPEN_EXISTING;
437
03ff3ca3	438	#ifdef WIN32_AIO
223d4670	439	overlapped = FILE_FLAG_OVERLAPPED;
03ff3ca3 AL	440	#else
03ff3ca3 AL	441	overlapped = FILE_ATTRIBUTE_NORMAL;
223d4670	442	#endif
33f00271 AZ	443	if (flags & BDRV_O_DIRECT)
33f00271 AZ	444	overlapped \|= FILE_FLAG_NO_BUFFERING \| FILE_FLAG_WRITE_THROUGH;
223d4670 TS	445	s->hfile = CreateFile(filename, access_flags,
	446	FILE_SHARE_READ, NULL,
	447	create_flags, overlapped, NULL);
	448	if (s->hfile == INVALID_HANDLE_VALUE) {
	449	int err = GetLastError();
	450
	451	if (err == ERROR_ACCESS_DENIED)
	452	return -EACCES;
	453	return -1;
	454	}
	455	return 0;
	456	}
	457
	458	#if 0
	459	/***********************************************/
	460	/* removable device additional commands */
	461
	462	static int raw_is_inserted(BlockDriverState *bs)
	463	{
	464	return 1;
	465	}
	466
	467	static int raw_media_changed(BlockDriverState *bs)
	468	{
	469	return -ENOTSUP;
	470	}
	471
	472	static int raw_eject(BlockDriverState *bs, int eject_flag)
	473	{
	474	DWORD ret_count;
	475
	476	if (s->type == FTYPE_FILE)
	477	return -ENOTSUP;
	478	if (eject_flag) {
	479	DeviceIoControl(s->hfile, IOCTL_STORAGE_EJECT_MEDIA,
	480	NULL, 0, NULL, 0, &lpBytesReturned, NULL);
	481	} else {
	482	DeviceIoControl(s->hfile, IOCTL_STORAGE_LOAD_MEDIA,
	483	NULL, 0, NULL, 0, &lpBytesReturned, NULL);
	484	}
	485	}
	486
	487	static int raw_set_locked(BlockDriverState *bs, int locked)
	488	{
	489	return -ENOTSUP;
	490	}
	491	#endif
	492
	493	BlockDriver bdrv_host_device = {
	494	"host_device",
	495	sizeof(BDRVRawState),
	496	NULL, /* no probe for protocols */
	497	hdev_open,
	498	NULL,
	499	NULL,
	500	raw_close,
	501	NULL,
	502	raw_flush,
	503
03ff3ca3	504	#ifdef WIN32_AIO
223d4670 TS	505	.bdrv_aio_read = raw_aio_read,
	506	.bdrv_aio_write = raw_aio_write,
	507	.bdrv_aio_cancel = raw_aio_cancel,
	508	.aiocb_size = sizeof(RawAIOCB);
	509	#endif
	510	.bdrv_pread = raw_pread,
	511	.bdrv_pwrite = raw_pwrite,
	512	.bdrv_getlength = raw_getlength,
	513	};