[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 "module.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;
    DWORD overlapped;

    s->type = FTYPE_FILE;

    if (flags & BDRV_O_RDWR) {
        access_flags = GENERIC_READ | GENERIC_WRITE;
    } else {
        access_flags = GENERIC_READ;
    }

    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,
                          OPEN_EXISTING, 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, QEMUOptionParameter *options)
{
    int fd;
    int64_t total_size = 0;

    /* Read out options */
    while (options && options->name) {
        if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
            total_size = options->value.n / 512;
        }
        options++;
    }

    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;
}

static QEMUOptionParameter raw_create_options[] = {
    {
        .name = BLOCK_OPT_SIZE,
        .type = OPT_SIZE,
        .help = "Virtual disk size"
    },
    { NULL }
};

static 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,

    .create_options = raw_create_options,
};

/***********************************************/
/* 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_probe_device(const char *filename)
{
    if (strstart(filename, "/dev/cdrom", NULL))
        return 100;
    if (is_windows_drive(filename))
        return 100;
    return 0;
}

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_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

static BlockDriver bdrv_host_device = {
    .format_name	= "host_device",
    .instance_size	= sizeof(BDRVRawState),
    .bdrv_probe_device	= hdev_probe_device,
    .bdrv_open		= hdev_open,
    .bdrv_close		= raw_close,
    .bdrv_flush		= raw_flush,

    .bdrv_read		= raw_read,
    .bdrv_write	        = raw_write,
    .bdrv_getlength	= raw_getlength,
};

static void bdrv_raw_init(void)
{
    bdrv_register(&bdrv_raw);
    bdrv_register(&bdrv_host_device);
}

block_init(bdrv_raw_init);
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	26	#include "block_int.h"
5efa9d5a	27	#include "module.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;
9a2d77ad	79	int access_flags;
223d4670 TS	80	DWORD overlapped;
	81
	82	s->type = FTYPE_FILE;
	83
f5edb014	84	if (flags & BDRV_O_RDWR) {
223d4670 TS	85	access_flags = GENERIC_READ \| GENERIC_WRITE;
	86	} else {
	87	access_flags = GENERIC_READ;
	88	}
9a2d77ad	89
03ff3ca3	90	overlapped = FILE_ATTRIBUTE_NORMAL;
9f7965c7	91	if ((flags & BDRV_O_NOCACHE))
33f00271	92	overlapped \|= FILE_FLAG_NO_BUFFERING \| FILE_FLAG_WRITE_THROUGH;
9f7965c7 AL	93	else if (!(flags & BDRV_O_CACHE_WB))
9f7965c7 AL	94	overlapped \|= FILE_FLAG_WRITE_THROUGH;
223d4670 TS	95	s->hfile = CreateFile(filename, access_flags,
223d4670 TS	96	FILE_SHARE_READ, NULL,
9a2d77ad	97	OPEN_EXISTING, overlapped, NULL);
223d4670 TS	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
eda578e5 AL	108	static int raw_read(BlockDriverState *bs, int64_t sector_num,
eda578e5 AL	109	uint8_t *buf, int nb_sectors)
223d4670 TS	110	{
	111	BDRVRawState *s = bs->opaque;
	112	OVERLAPPED ov;
	113	DWORD ret_count;
	114	int ret;
eda578e5 AL	115	int64_t offset = sector_num * 512;
eda578e5 AL	116	int count = nb_sectors * 512;
223d4670 TS	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);
9c39be47 AL	122	if (!ret)
9c39be47 AL	123	return ret_count;
537a1d4b AL	124	if (ret_count == count)
537a1d4b AL	125	ret_count = 0;
223d4670 TS	126	return ret_count;
	127	}
	128
eda578e5 AL	129	static int raw_write(BlockDriverState *bs, int64_t sector_num,
eda578e5 AL	130	const uint8_t *buf, int nb_sectors)
223d4670 TS	131	{
	132	BDRVRawState *s = bs->opaque;
	133	OVERLAPPED ov;
	134	DWORD ret_count;
	135	int ret;
eda578e5 AL	136	int64_t offset = sector_num * 512;
eda578e5 AL	137	int count = nb_sectors * 512;
223d4670 TS	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);
9c39be47 AL	143	if (!ret)
9c39be47 AL	144	return ret_count;
537a1d4b AL	145	if (ret_count == count)
537a1d4b AL	146	ret_count = 0;
223d4670 TS	147	return ret_count;
	148	}
	149
223d4670 TS	150	static void raw_flush(BlockDriverState *bs)
	151	{
	152	BDRVRawState *s = bs->opaque;
	153	FlushFileBuffers(s->hfile);
	154	}
	155
	156	static void raw_close(BlockDriverState *bs)
	157	{
	158	BDRVRawState *s = bs->opaque;
	159	CloseHandle(s->hfile);
	160	}
	161
	162	static int raw_truncate(BlockDriverState *bs, int64_t offset)
	163	{
	164	BDRVRawState *s = bs->opaque;
b9e82a59	165	LONG low, high;
223d4670 TS	166
	167	low = offset;
	168	high = offset >> 32;
	169	if (!SetFilePointer(s->hfile, low, &high, FILE_BEGIN))
	170	return -EIO;
	171	if (!SetEndOfFile(s->hfile))
	172	return -EIO;
	173	return 0;
	174	}
	175
	176	static int64_t raw_getlength(BlockDriverState *bs)
	177	{
	178	BDRVRawState *s = bs->opaque;
	179	LARGE_INTEGER l;
	180	ULARGE_INTEGER available, total, total_free;
	181	DISK_GEOMETRY_EX dg;
	182	DWORD count;
	183	BOOL status;
	184
	185	switch(s->type) {
	186	case FTYPE_FILE:
b9e82a59	187	l.LowPart = GetFileSize(s->hfile, (PDWORD)&l.HighPart);
223d4670 TS	188	if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
	189	return -EIO;
	190	break;
	191	case FTYPE_CD:
	192	if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free))
	193	return -EIO;
	194	l.QuadPart = total.QuadPart;
	195	break;
	196	case FTYPE_HARDDISK:
	197	status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
	198	NULL, 0, &dg, sizeof(dg), &count, NULL);
	199	if (status != 0) {
	200	l = dg.DiskSize;
	201	}
	202	break;
	203	default:
	204	return -EIO;
	205	}
	206	return l.QuadPart;
	207	}
	208
0e7e1989	209	static int raw_create(const char filename, QEMUOptionParameter options)
223d4670 TS	210	{
223d4670 TS	211	int fd;
0e7e1989	212	int64_t total_size = 0;
223d4670	213
0e7e1989 KW	214	/* Read out options */
	215	while (options && options->name) {
	216	if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
	217	total_size = options->value.n / 512;
	218	}
	219	options++;
	220	}
223d4670 TS	221
	222	fd = open(filename, O_WRONLY \| O_CREAT \| O_TRUNC \| O_BINARY,
	223	0644);
	224	if (fd < 0)
	225	return -EIO;
	226	set_sparse(fd);
	227	ftruncate(fd, total_size * 512);
	228	close(fd);
	229	return 0;
	230	}
	231
0e7e1989	232	static QEMUOptionParameter raw_create_options[] = {
db08adf5 KW	233	{
	234	.name = BLOCK_OPT_SIZE,
	235	.type = OPT_SIZE,
	236	.help = "Virtual disk size"
	237	},
0e7e1989 KW	238	{ NULL }
	239	};
	240
5efa9d5a	241	static BlockDriver bdrv_raw = {
f1b2f712 AL	242	.format_name = "raw",
	243	.instance_size = sizeof(BDRVRawState),
	244	.bdrv_open = raw_open,
	245	.bdrv_close = raw_close,
	246	.bdrv_create = raw_create,
	247	.bdrv_flush = raw_flush,
	248	.bdrv_read = raw_read,
	249	.bdrv_write = raw_write,
	250	.bdrv_truncate = raw_truncate,
	251	.bdrv_getlength = raw_getlength,
0e7e1989 KW	252
0e7e1989 KW	253	.create_options = raw_create_options,
223d4670 TS	254	};
	255
	256	/***********************************************/
	257	/* host device */
	258
	259	static int find_cdrom(char *cdrom_name, int cdrom_name_size)
	260	{
	261	char drives[256], *pdrv = drives;
	262	UINT type;
	263
	264	memset(drives, 0, sizeof(drives));
	265	GetLogicalDriveStrings(sizeof(drives), drives);
	266	while(pdrv[0] != '\0') {
	267	type = GetDriveType(pdrv);
	268	switch(type) {
	269	case DRIVE_CDROM:
	270	snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]);
	271	return 0;
	272	break;
	273	}
	274	pdrv += lstrlen(pdrv) + 1;
	275	}
	276	return -1;
	277	}
	278
	279	static int find_device_type(BlockDriverState bs, const char filename)
	280	{
	281	BDRVRawState *s = bs->opaque;
	282	UINT type;
	283	const char *p;
	284
	285	if (strstart(filename, "\\\\.\\", &p) \|\|
	286	strstart(filename, "//./", &p)) {
	287	if (stristart(p, "PhysicalDrive", NULL))
	288	return FTYPE_HARDDISK;
	289	snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]);
	290	type = GetDriveType(s->drive_path);
3060cd14 AL	291	switch (type) {
	292	case DRIVE_REMOVABLE:
	293	case DRIVE_FIXED:
	294	return FTYPE_HARDDISK;
	295	case DRIVE_CDROM:
223d4670	296	return FTYPE_CD;
3060cd14	297	default:
223d4670	298	return FTYPE_FILE;
3060cd14	299	}
223d4670 TS	300	} else {
	301	return FTYPE_FILE;
	302	}
	303	}
	304
508c7cb3 CH	305	static int hdev_probe_device(const char *filename)
	306	{
	307	if (strstart(filename, "/dev/cdrom", NULL))
	308	return 100;
	309	if (is_windows_drive(filename))
	310	return 100;
	311	return 0;
	312	}
	313
223d4670 TS	314	static int hdev_open(BlockDriverState bs, const char filename, int flags)
	315	{
	316	BDRVRawState *s = bs->opaque;
	317	int access_flags, create_flags;
	318	DWORD overlapped;
	319	char device_name[64];
	320
	321	if (strstart(filename, "/dev/cdrom", NULL)) {
	322	if (find_cdrom(device_name, sizeof(device_name)) < 0)
	323	return -ENOENT;
	324	filename = device_name;
	325	} else {
	326	/* transform drive letters into device name */
	327	if (((filename[0] >= 'a' && filename[0] <= 'z') \|\|
	328	(filename[0] >= 'A' && filename[0] <= 'Z')) &&
	329	filename[1] == ':' && filename[2] == '\0') {
	330	snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]);
	331	filename = device_name;
	332	}
	333	}
	334	s->type = find_device_type(bs, filename);
	335
f5edb014	336	if (flags & BDRV_O_RDWR) {
223d4670 TS	337	access_flags = GENERIC_READ \| GENERIC_WRITE;
	338	} else {
	339	access_flags = GENERIC_READ;
	340	}
	341	create_flags = OPEN_EXISTING;
	342
03ff3ca3	343	overlapped = FILE_ATTRIBUTE_NORMAL;
9f7965c7	344	if ((flags & BDRV_O_NOCACHE))
33f00271	345	overlapped \|= FILE_FLAG_NO_BUFFERING \| FILE_FLAG_WRITE_THROUGH;
9f7965c7 AL	346	else if (!(flags & BDRV_O_CACHE_WB))
9f7965c7 AL	347	overlapped \|= FILE_FLAG_WRITE_THROUGH;
223d4670 TS	348	s->hfile = CreateFile(filename, access_flags,
	349	FILE_SHARE_READ, NULL,
	350	create_flags, overlapped, NULL);
	351	if (s->hfile == INVALID_HANDLE_VALUE) {
	352	int err = GetLastError();
	353
	354	if (err == ERROR_ACCESS_DENIED)
	355	return -EACCES;
	356	return -1;
	357	}
	358	return 0;
	359	}
	360
	361	#if 0
	362	/***********************************************/
	363	/* removable device additional commands */
	364
	365	static int raw_is_inserted(BlockDriverState *bs)
	366	{
	367	return 1;
	368	}
	369
	370	static int raw_media_changed(BlockDriverState *bs)
	371	{
	372	return -ENOTSUP;
	373	}
	374
	375	static int raw_eject(BlockDriverState *bs, int eject_flag)
	376	{
	377	DWORD ret_count;
	378
	379	if (s->type == FTYPE_FILE)
	380	return -ENOTSUP;
	381	if (eject_flag) {
	382	DeviceIoControl(s->hfile, IOCTL_STORAGE_EJECT_MEDIA,
	383	NULL, 0, NULL, 0, &lpBytesReturned, NULL);
	384	} else {
	385	DeviceIoControl(s->hfile, IOCTL_STORAGE_LOAD_MEDIA,
	386	NULL, 0, NULL, 0, &lpBytesReturned, NULL);
	387	}
	388	}
	389
	390	static int raw_set_locked(BlockDriverState *bs, int locked)
	391	{
	392	return -ENOTSUP;
	393	}
	394	#endif
	395
5efa9d5a	396	static BlockDriver bdrv_host_device = {
e60f469c AJ	397	.format_name = "host_device",
e60f469c AJ	398	.instance_size = sizeof(BDRVRawState),
508c7cb3	399	.bdrv_probe_device = hdev_probe_device,
e60f469c AJ	400	.bdrv_open = hdev_open,
	401	.bdrv_close = raw_close,
	402	.bdrv_flush = raw_flush,
223d4670	403
eda578e5 AL	404	.bdrv_read = raw_read,
eda578e5 AL	405	.bdrv_write = raw_write,
e60f469c	406	.bdrv_getlength = raw_getlength,
223d4670	407	};
5efa9d5a AL	408
	409	static void bdrv_raw_init(void)
	410	{
	411	bdrv_register(&bdrv_raw);
	412	bdrv_register(&bdrv_host_device);
	413	}
	414
	415	block_init(bdrv_raw_init);