[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 <windows.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;

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;
    }
    overlapped = FILE_ATTRIBUTE_NORMAL;
    if ((flags & BDRV_O_NOCACHE))
        overlapped |= FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH;
    else if (!(flags & BDRV_O_CACHE_WB))
        overlapped |= 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_read(BlockDriverState *bs, int64_t sector_num,
                    uint8_t *buf, int nb_sectors)
{
    BDRVRawState *s = bs->opaque;
    OVERLAPPED ov;
    DWORD ret_count;
    int ret;
    int64_t offset = sector_num * 512;
    int count = nb_sectors * 512;

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

static int raw_write(BlockDriverState *bs, int64_t sector_num,
                     const uint8_t *buf, int nb_sectors)
{
    BDRVRawState *s = bs->opaque;
    OVERLAPPED ov;
    DWORD ret_count;
    int ret;
    int64_t offset = sector_num * 512;
    int count = nb_sectors * 512;

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

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;
    LONG 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, (PDWORD)&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 = {
    .format_name	= "raw",
    .instance_size	= sizeof(BDRVRawState),
    .bdrv_open		= raw_open,
    .bdrv_close		= raw_close,
    .bdrv_create	= raw_create,
    .bdrv_flush		= raw_flush,
    .bdrv_read		= raw_read,
    .bdrv_write		= raw_write,
    .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);
        switch (type) {
        case DRIVE_REMOVABLE:
        case DRIVE_FIXED:
            return FTYPE_HARDDISK;
        case DRIVE_CDROM:
            return FTYPE_CD;
        default:
            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;

    overlapped = FILE_ATTRIBUTE_NORMAL;
    if ((flags & BDRV_O_NOCACHE))
        overlapped |= FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH;
    else if (!(flags & BDRV_O_CACHE_WB))
        overlapped |= 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 = {
    .format_name	= "host_device",
    .instance_size	= sizeof(BDRVRawState),
    .bdrv_open		= hdev_open,
    .bdrv_close		= raw_close,
    .bdrv_flush		= raw_flush,

    .bdrv_read		= raw_read,
    .bdrv_write	        = raw_write,
    .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"
223d4670 TS	27	#include <assert.h>
49dc768d	28	#include <windows.h>
223d4670 TS	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
223d4670 TS	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;
	79	int access_flags, create_flags;
	80	DWORD overlapped;
	81
	82	s->type = FTYPE_FILE;
	83
	84	if ((flags & BDRV_O_ACCESS) == O_RDWR) {
	85	access_flags = GENERIC_READ \| GENERIC_WRITE;
	86	} else {
	87	access_flags = GENERIC_READ;
	88	}
	89	if (flags & BDRV_O_CREAT) {
	90	create_flags = CREATE_ALWAYS;
	91	} else {
	92	create_flags = OPEN_EXISTING;
	93	}
03ff3ca3	94	overlapped = FILE_ATTRIBUTE_NORMAL;
9f7965c7	95	if ((flags & BDRV_O_NOCACHE))
33f00271	96	overlapped \|= FILE_FLAG_NO_BUFFERING \| FILE_FLAG_WRITE_THROUGH;
9f7965c7 AL	97	else if (!(flags & BDRV_O_CACHE_WB))
9f7965c7 AL	98	overlapped \|= FILE_FLAG_WRITE_THROUGH;
223d4670 TS	99	s->hfile = CreateFile(filename, access_flags,
	100	FILE_SHARE_READ, NULL,
	101	create_flags, overlapped, NULL);
	102	if (s->hfile == INVALID_HANDLE_VALUE) {
	103	int err = GetLastError();
	104
	105	if (err == ERROR_ACCESS_DENIED)
	106	return -EACCES;
	107	return -1;
	108	}
	109	return 0;
	110	}
	111
eda578e5 AL	112	static int raw_read(BlockDriverState *bs, int64_t sector_num,
eda578e5 AL	113	uint8_t *buf, int nb_sectors)
223d4670 TS	114	{
	115	BDRVRawState *s = bs->opaque;
	116	OVERLAPPED ov;
	117	DWORD ret_count;
	118	int ret;
eda578e5 AL	119	int64_t offset = sector_num * 512;
eda578e5 AL	120	int count = nb_sectors * 512;
223d4670 TS	121
	122	memset(&ov, 0, sizeof(ov));
	123	ov.Offset = offset;
	124	ov.OffsetHigh = offset >> 32;
	125	ret = ReadFile(s->hfile, buf, count, &ret_count, &ov);
9c39be47 AL	126	if (!ret)
9c39be47 AL	127	return ret_count;
537a1d4b AL	128	if (ret_count == count)
537a1d4b AL	129	ret_count = 0;
223d4670 TS	130	return ret_count;
	131	}
	132
eda578e5 AL	133	static int raw_write(BlockDriverState *bs, int64_t sector_num,
eda578e5 AL	134	const uint8_t *buf, int nb_sectors)
223d4670 TS	135	{
	136	BDRVRawState *s = bs->opaque;
	137	OVERLAPPED ov;
	138	DWORD ret_count;
	139	int ret;
eda578e5 AL	140	int64_t offset = sector_num * 512;
eda578e5 AL	141	int count = nb_sectors * 512;
223d4670 TS	142
	143	memset(&ov, 0, sizeof(ov));
	144	ov.Offset = offset;
	145	ov.OffsetHigh = offset >> 32;
	146	ret = WriteFile(s->hfile, buf, count, &ret_count, &ov);
9c39be47 AL	147	if (!ret)
9c39be47 AL	148	return ret_count;
537a1d4b AL	149	if (ret_count == count)
537a1d4b AL	150	ret_count = 0;
223d4670 TS	151	return ret_count;
	152	}
	153
223d4670 TS	154	static void raw_flush(BlockDriverState *bs)
	155	{
	156	BDRVRawState *s = bs->opaque;
	157	FlushFileBuffers(s->hfile);
	158	}
	159
	160	static void raw_close(BlockDriverState *bs)
	161	{
	162	BDRVRawState *s = bs->opaque;
	163	CloseHandle(s->hfile);
	164	}
	165
	166	static int raw_truncate(BlockDriverState *bs, int64_t offset)
	167	{
	168	BDRVRawState *s = bs->opaque;
b9e82a59	169	LONG low, high;
223d4670 TS	170
	171	low = offset;
	172	high = offset >> 32;
	173	if (!SetFilePointer(s->hfile, low, &high, FILE_BEGIN))
	174	return -EIO;
	175	if (!SetEndOfFile(s->hfile))
	176	return -EIO;
	177	return 0;
	178	}
	179
	180	static int64_t raw_getlength(BlockDriverState *bs)
	181	{
	182	BDRVRawState *s = bs->opaque;
	183	LARGE_INTEGER l;
	184	ULARGE_INTEGER available, total, total_free;
	185	DISK_GEOMETRY_EX dg;
	186	DWORD count;
	187	BOOL status;
	188
	189	switch(s->type) {
	190	case FTYPE_FILE:
b9e82a59	191	l.LowPart = GetFileSize(s->hfile, (PDWORD)&l.HighPart);
223d4670 TS	192	if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
	193	return -EIO;
	194	break;
	195	case FTYPE_CD:
	196	if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free))
	197	return -EIO;
	198	l.QuadPart = total.QuadPart;
	199	break;
	200	case FTYPE_HARDDISK:
	201	status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
	202	NULL, 0, &dg, sizeof(dg), &count, NULL);
	203	if (status != 0) {
	204	l = dg.DiskSize;
	205	}
	206	break;
	207	default:
	208	return -EIO;
	209	}
	210	return l.QuadPart;
	211	}
	212
	213	static int raw_create(const char *filename, int64_t total_size,
	214	const char *backing_file, int flags)
	215	{
	216	int fd;
	217
	218	if (flags \|\| backing_file)
	219	return -ENOTSUP;
	220
	221	fd = open(filename, O_WRONLY \| O_CREAT \| O_TRUNC \| O_BINARY,
	222	0644);
	223	if (fd < 0)
	224	return -EIO;
	225	set_sparse(fd);
	226	ftruncate(fd, total_size * 512);
	227	close(fd);
	228	return 0;
	229	}
	230
223d4670	231	BlockDriver bdrv_raw = {
f1b2f712 AL	232	.format_name = "raw",
	233	.instance_size = sizeof(BDRVRawState),
	234	.bdrv_open = raw_open,
	235	.bdrv_close = raw_close,
	236	.bdrv_create = raw_create,
	237	.bdrv_flush = raw_flush,
	238	.bdrv_read = raw_read,
	239	.bdrv_write = raw_write,
	240	.bdrv_truncate = raw_truncate,
	241	.bdrv_getlength = raw_getlength,
223d4670 TS	242	};
	243
	244	/***********************************************/
	245	/* host device */
	246
	247	static int find_cdrom(char *cdrom_name, int cdrom_name_size)
	248	{
	249	char drives[256], *pdrv = drives;
	250	UINT type;
	251
	252	memset(drives, 0, sizeof(drives));
	253	GetLogicalDriveStrings(sizeof(drives), drives);
	254	while(pdrv[0] != '\0') {
	255	type = GetDriveType(pdrv);
	256	switch(type) {
	257	case DRIVE_CDROM:
	258	snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]);
	259	return 0;
	260	break;
	261	}
	262	pdrv += lstrlen(pdrv) + 1;
	263	}
	264	return -1;
	265	}
	266
	267	static int find_device_type(BlockDriverState bs, const char filename)
	268	{
	269	BDRVRawState *s = bs->opaque;
	270	UINT type;
	271	const char *p;
	272
	273	if (strstart(filename, "\\\\.\\", &p) \|\|
	274	strstart(filename, "//./", &p)) {
	275	if (stristart(p, "PhysicalDrive", NULL))
	276	return FTYPE_HARDDISK;
	277	snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]);
	278	type = GetDriveType(s->drive_path);
3060cd14 AL	279	switch (type) {
	280	case DRIVE_REMOVABLE:
	281	case DRIVE_FIXED:
	282	return FTYPE_HARDDISK;
	283	case DRIVE_CDROM:
223d4670	284	return FTYPE_CD;
3060cd14	285	default:
223d4670	286	return FTYPE_FILE;
3060cd14	287	}
223d4670 TS	288	} else {
	289	return FTYPE_FILE;
	290	}
	291	}
	292
	293	static int hdev_open(BlockDriverState bs, const char filename, int flags)
	294	{
	295	BDRVRawState *s = bs->opaque;
	296	int access_flags, create_flags;
	297	DWORD overlapped;
	298	char device_name[64];
	299
	300	if (strstart(filename, "/dev/cdrom", NULL)) {
	301	if (find_cdrom(device_name, sizeof(device_name)) < 0)
	302	return -ENOENT;
	303	filename = device_name;
	304	} else {
	305	/* transform drive letters into device name */
	306	if (((filename[0] >= 'a' && filename[0] <= 'z') \|\|
	307	(filename[0] >= 'A' && filename[0] <= 'Z')) &&
	308	filename[1] == ':' && filename[2] == '\0') {
	309	snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]);
	310	filename = device_name;
	311	}
	312	}
	313	s->type = find_device_type(bs, filename);
	314
	315	if ((flags & BDRV_O_ACCESS) == O_RDWR) {
	316	access_flags = GENERIC_READ \| GENERIC_WRITE;
	317	} else {
	318	access_flags = GENERIC_READ;
	319	}
	320	create_flags = OPEN_EXISTING;
	321
03ff3ca3	322	overlapped = FILE_ATTRIBUTE_NORMAL;
9f7965c7	323	if ((flags & BDRV_O_NOCACHE))
33f00271	324	overlapped \|= FILE_FLAG_NO_BUFFERING \| FILE_FLAG_WRITE_THROUGH;
9f7965c7 AL	325	else if (!(flags & BDRV_O_CACHE_WB))
9f7965c7 AL	326	overlapped \|= FILE_FLAG_WRITE_THROUGH;
223d4670 TS	327	s->hfile = CreateFile(filename, access_flags,
	328	FILE_SHARE_READ, NULL,
	329	create_flags, overlapped, NULL);
	330	if (s->hfile == INVALID_HANDLE_VALUE) {
	331	int err = GetLastError();
	332
	333	if (err == ERROR_ACCESS_DENIED)
	334	return -EACCES;
	335	return -1;
	336	}
	337	return 0;
	338	}
	339
	340	#if 0
	341	/***********************************************/
	342	/* removable device additional commands */
	343
	344	static int raw_is_inserted(BlockDriverState *bs)
	345	{
	346	return 1;
	347	}
	348
	349	static int raw_media_changed(BlockDriverState *bs)
	350	{
	351	return -ENOTSUP;
	352	}
	353
	354	static int raw_eject(BlockDriverState *bs, int eject_flag)
	355	{
	356	DWORD ret_count;
	357
	358	if (s->type == FTYPE_FILE)
	359	return -ENOTSUP;
	360	if (eject_flag) {
	361	DeviceIoControl(s->hfile, IOCTL_STORAGE_EJECT_MEDIA,
	362	NULL, 0, NULL, 0, &lpBytesReturned, NULL);
	363	} else {
	364	DeviceIoControl(s->hfile, IOCTL_STORAGE_LOAD_MEDIA,
	365	NULL, 0, NULL, 0, &lpBytesReturned, NULL);
	366	}
	367	}
	368
	369	static int raw_set_locked(BlockDriverState *bs, int locked)
	370	{
	371	return -ENOTSUP;
	372	}
	373	#endif
	374
	375	BlockDriver bdrv_host_device = {
e60f469c AJ	376	.format_name = "host_device",
	377	.instance_size = sizeof(BDRVRawState),
	378	.bdrv_open = hdev_open,
	379	.bdrv_close = raw_close,
	380	.bdrv_flush = raw_flush,
223d4670	381
eda578e5 AL	382	.bdrv_read = raw_read,
eda578e5 AL	383	.bdrv_write = raw_write,
e60f469c	384	.bdrv_getlength = raw_getlength,
223d4670	385	};