[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;
    DWORD dw;
    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 == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) {
	return -1;
    }

    high = length >> 32;
    dw = SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN);
    if (dw == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) {
	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;
    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 int raw_flush(BlockDriverState *bs)
{
    BDRVRawState *s = bs->opaque;
    int ret;

    ret = FlushFileBuffers(s->hfile);
    if (ret == 0) {
        return -EIO;
    }

    return 0;
}

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 int64_t raw_get_allocated_file_size(BlockDriverState *bs)
{
    typedef DWORD (WINAPI * get_compressed_t)(const char *filename,
                                              DWORD * high);
    get_compressed_t get_compressed;
    struct _stati64 st;
    const char *filename = bs->filename;
    /* WinNT support GetCompressedFileSize to determine allocate size */
    get_compressed =
        (get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"),
                                            "GetCompressedFileSizeA");
    if (get_compressed) {
        DWORD high, low;
        low = get_compressed(filename, &high);
        if (low != 0xFFFFFFFFlu || GetLastError() == NO_ERROR) {
            return (((int64_t) high) << 32) + low;
        }
    }

    if (_stati64(filename, &st) < 0) {
        return -1;
    }
    return st.st_size;
}

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_file = {
    .format_name	= "file",
    .protocol_name	= "file",
    .instance_size	= sizeof(BDRVRawState),
    .bdrv_file_open	= raw_open,
    .bdrv_close		= raw_close,
    .bdrv_create	= raw_create,

    .bdrv_read              = raw_read,
    .bdrv_write             = raw_write,
    .bdrv_co_flush_to_disk  = raw_flush,

    .bdrv_truncate	= raw_truncate,
    .bdrv_getlength	= raw_getlength,
    .bdrv_get_allocated_file_size
                        = raw_get_allocated_file_size,

    .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;
    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 hdev_has_zero_init(BlockDriverState *bs)
{
    return 0;
}

static BlockDriver bdrv_host_device = {
    .format_name	= "host_device",
    .protocol_name	= "host_device",
    .instance_size	= sizeof(BDRVRawState),
    .bdrv_probe_device	= hdev_probe_device,
    .bdrv_file_open	= hdev_open,
    .bdrv_close		= raw_close,
    .bdrv_has_zero_init = hdev_has_zero_init,

    .bdrv_read              = raw_read,
    .bdrv_write             = raw_write,
    .bdrv_co_flush_to_disk  = raw_flush,

    .bdrv_getlength	= raw_getlength,
    .bdrv_get_allocated_file_size
                        = raw_get_allocated_file_size,
};

static void bdrv_file_init(void)
{
    bdrv_register(&bdrv_file);
    bdrv_register(&bdrv_host_device);
}

block_init(bdrv_file_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;
2c993ec2	44	DWORD dw;
223d4670 TS	45	LONG high;
	46	HANDLE h;
	47	BOOL res;
	48
	49	if ((GetVersion() & 0x80000000UL) && (length >> 32) != 0)
	50	return -1;
	51
	52	h = (HANDLE)_get_osfhandle(fd);
	53
	54	/* get current position, ftruncate do not change position */
	55	li.HighPart = 0;
	56	li.LowPart = SetFilePointer (h, 0, &li.HighPart, FILE_CURRENT);
2c993ec2	57	if (li.LowPart == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) {
223d4670	58	return -1;
2c993ec2	59	}
223d4670 TS	60
223d4670 TS	61	high = length >> 32;
2c993ec2 SW	62	dw = SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN);
2c993ec2 SW	63	if (dw == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) {
223d4670	64	return -1;
2c993ec2	65	}
223d4670 TS	66	res = SetEndOfFile(h);
	67
	68	/* back to old position */
	69	SetFilePointer(h, li.LowPart, &li.HighPart, FILE_BEGIN);
	70	return res ? 0 : -1;
	71	}
	72
	73	static int set_sparse(int fd)
	74	{
	75	DWORD returned;
	76	return (int) DeviceIoControl((HANDLE)_get_osfhandle(fd), FSCTL_SET_SPARSE,
	77	NULL, 0, NULL, 0, &returned, NULL);
	78	}
	79
	80	static int raw_open(BlockDriverState bs, const char filename, int flags)
	81	{
	82	BDRVRawState *s = bs->opaque;
9a2d77ad	83	int access_flags;
223d4670 TS	84	DWORD overlapped;
	85
	86	s->type = FTYPE_FILE;
	87
f5edb014	88	if (flags & BDRV_O_RDWR) {
223d4670 TS	89	access_flags = GENERIC_READ \| GENERIC_WRITE;
	90	} else {
	91	access_flags = GENERIC_READ;
	92	}
9a2d77ad	93
03ff3ca3	94	overlapped = FILE_ATTRIBUTE_NORMAL;
a6599793 CH	95	if (flags & BDRV_O_NOCACHE)
	96	overlapped \|= FILE_FLAG_NO_BUFFERING;
	97	if (!(flags & BDRV_O_CACHE_WB))
9f7965c7	98	overlapped \|= FILE_FLAG_WRITE_THROUGH;
223d4670 TS	99	s->hfile = CreateFile(filename, access_flags,
223d4670 TS	100	FILE_SHARE_READ, NULL,
9a2d77ad	101	OPEN_EXISTING, overlapped, NULL);
223d4670 TS	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
cfd07e7a	154	static int raw_flush(BlockDriverState *bs)
223d4670 TS	155	{
223d4670 TS	156	BDRVRawState *s = bs->opaque;
205ef796 KW	157	int ret;
	158
	159	ret = FlushFileBuffers(s->hfile);
1b40bbd1	160	if (ret == 0) {
205ef796 KW	161	return -EIO;
	162	}
	163
	164	return 0;
223d4670 TS	165	}
	166
	167	static void raw_close(BlockDriverState *bs)
	168	{
	169	BDRVRawState *s = bs->opaque;
	170	CloseHandle(s->hfile);
	171	}
	172
	173	static int raw_truncate(BlockDriverState *bs, int64_t offset)
	174	{
	175	BDRVRawState *s = bs->opaque;
b9e82a59	176	LONG low, high;
223d4670 TS	177
	178	low = offset;
	179	high = offset >> 32;
	180	if (!SetFilePointer(s->hfile, low, &high, FILE_BEGIN))
	181	return -EIO;
	182	if (!SetEndOfFile(s->hfile))
	183	return -EIO;
	184	return 0;
	185	}
	186
	187	static int64_t raw_getlength(BlockDriverState *bs)
	188	{
	189	BDRVRawState *s = bs->opaque;
	190	LARGE_INTEGER l;
	191	ULARGE_INTEGER available, total, total_free;
	192	DISK_GEOMETRY_EX dg;
	193	DWORD count;
	194	BOOL status;
	195
	196	switch(s->type) {
	197	case FTYPE_FILE:
b9e82a59	198	l.LowPart = GetFileSize(s->hfile, (PDWORD)&l.HighPart);
223d4670 TS	199	if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
	200	return -EIO;
	201	break;
	202	case FTYPE_CD:
	203	if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free))
	204	return -EIO;
	205	l.QuadPart = total.QuadPart;
	206	break;
	207	case FTYPE_HARDDISK:
	208	status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
	209	NULL, 0, &dg, sizeof(dg), &count, NULL);
	210	if (status != 0) {
	211	l = dg.DiskSize;
	212	}
	213	break;
	214	default:
	215	return -EIO;
	216	}
	217	return l.QuadPart;
	218	}
	219
4a1d5e1f FZ	220	static int64_t raw_get_allocated_file_size(BlockDriverState *bs)
	221	{
	222	typedef DWORD (WINAPI * get_compressed_t)(const char *filename,
	223	DWORD * high);
	224	get_compressed_t get_compressed;
	225	struct _stati64 st;
	226	const char *filename = bs->filename;
	227	/* WinNT support GetCompressedFileSize to determine allocate size */
	228	get_compressed =
	229	(get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"),
	230	"GetCompressedFileSizeA");
	231	if (get_compressed) {
	232	DWORD high, low;
	233	low = get_compressed(filename, &high);
	234	if (low != 0xFFFFFFFFlu \|\| GetLastError() == NO_ERROR) {
	235	return (((int64_t) high) << 32) + low;
	236	}
	237	}
	238
	239	if (_stati64(filename, &st) < 0) {
	240	return -1;
	241	}
	242	return st.st_size;
	243	}
	244
0e7e1989	245	static int raw_create(const char filename, QEMUOptionParameter options)
223d4670 TS	246	{
223d4670 TS	247	int fd;
0e7e1989	248	int64_t total_size = 0;
223d4670	249
0e7e1989 KW	250	/* Read out options */
	251	while (options && options->name) {
	252	if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
	253	total_size = options->value.n / 512;
	254	}
	255	options++;
	256	}
223d4670 TS	257
	258	fd = open(filename, O_WRONLY \| O_CREAT \| O_TRUNC \| O_BINARY,
	259	0644);
	260	if (fd < 0)
	261	return -EIO;
	262	set_sparse(fd);
	263	ftruncate(fd, total_size * 512);
	264	close(fd);
	265	return 0;
	266	}
	267
0e7e1989	268	static QEMUOptionParameter raw_create_options[] = {
db08adf5 KW	269	{
	270	.name = BLOCK_OPT_SIZE,
	271	.type = OPT_SIZE,
	272	.help = "Virtual disk size"
	273	},
0e7e1989 KW	274	{ NULL }
	275	};
	276
84a12e66 CH	277	static BlockDriver bdrv_file = {
	278	.format_name = "file",
	279	.protocol_name = "file",
f1b2f712	280	.instance_size = sizeof(BDRVRawState),
66f82cee	281	.bdrv_file_open = raw_open,
f1b2f712 AL	282	.bdrv_close = raw_close,
f1b2f712 AL	283	.bdrv_create = raw_create,
c68b89ac KW	284
	285	.bdrv_read = raw_read,
	286	.bdrv_write = raw_write,
	287	.bdrv_co_flush_to_disk = raw_flush,
	288
f1b2f712 AL	289	.bdrv_truncate = raw_truncate,
f1b2f712 AL	290	.bdrv_getlength = raw_getlength,
4a1d5e1f FZ	291	.bdrv_get_allocated_file_size
4a1d5e1f FZ	292	= raw_get_allocated_file_size,
0e7e1989 KW	293
0e7e1989 KW	294	.create_options = raw_create_options,
223d4670 TS	295	};
	296
	297	/***********************************************/
	298	/* host device */
	299
	300	static int find_cdrom(char *cdrom_name, int cdrom_name_size)
	301	{
	302	char drives[256], *pdrv = drives;
	303	UINT type;
	304
	305	memset(drives, 0, sizeof(drives));
	306	GetLogicalDriveStrings(sizeof(drives), drives);
	307	while(pdrv[0] != '\0') {
	308	type = GetDriveType(pdrv);
	309	switch(type) {
	310	case DRIVE_CDROM:
	311	snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]);
	312	return 0;
	313	break;
	314	}
	315	pdrv += lstrlen(pdrv) + 1;
	316	}
	317	return -1;
	318	}
	319
	320	static int find_device_type(BlockDriverState bs, const char filename)
	321	{
	322	BDRVRawState *s = bs->opaque;
	323	UINT type;
	324	const char *p;
	325
	326	if (strstart(filename, "\\\\.\\", &p) \|\|
	327	strstart(filename, "//./", &p)) {
	328	if (stristart(p, "PhysicalDrive", NULL))
	329	return FTYPE_HARDDISK;
	330	snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]);
	331	type = GetDriveType(s->drive_path);
3060cd14 AL	332	switch (type) {
	333	case DRIVE_REMOVABLE:
	334	case DRIVE_FIXED:
	335	return FTYPE_HARDDISK;
	336	case DRIVE_CDROM:
223d4670	337	return FTYPE_CD;
3060cd14	338	default:
223d4670	339	return FTYPE_FILE;
3060cd14	340	}
223d4670 TS	341	} else {
	342	return FTYPE_FILE;
	343	}
	344	}
	345
508c7cb3 CH	346	static int hdev_probe_device(const char *filename)
	347	{
	348	if (strstart(filename, "/dev/cdrom", NULL))
	349	return 100;
	350	if (is_windows_drive(filename))
	351	return 100;
	352	return 0;
	353	}
	354
223d4670 TS	355	static int hdev_open(BlockDriverState bs, const char filename, int flags)
	356	{
	357	BDRVRawState *s = bs->opaque;
	358	int access_flags, create_flags;
	359	DWORD overlapped;
	360	char device_name[64];
	361
	362	if (strstart(filename, "/dev/cdrom", NULL)) {
	363	if (find_cdrom(device_name, sizeof(device_name)) < 0)
	364	return -ENOENT;
	365	filename = device_name;
	366	} else {
	367	/* transform drive letters into device name */
	368	if (((filename[0] >= 'a' && filename[0] <= 'z') \|\|
	369	(filename[0] >= 'A' && filename[0] <= 'Z')) &&
	370	filename[1] == ':' && filename[2] == '\0') {
	371	snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]);
	372	filename = device_name;
	373	}
	374	}
	375	s->type = find_device_type(bs, filename);
	376
f5edb014	377	if (flags & BDRV_O_RDWR) {
223d4670 TS	378	access_flags = GENERIC_READ \| GENERIC_WRITE;
	379	} else {
	380	access_flags = GENERIC_READ;
	381	}
	382	create_flags = OPEN_EXISTING;
	383
03ff3ca3	384	overlapped = FILE_ATTRIBUTE_NORMAL;
a6599793 CH	385	if (flags & BDRV_O_NOCACHE)
	386	overlapped \|= FILE_FLAG_NO_BUFFERING;
	387	if (!(flags & BDRV_O_CACHE_WB))
9f7965c7	388	overlapped \|= FILE_FLAG_WRITE_THROUGH;
223d4670 TS	389	s->hfile = CreateFile(filename, access_flags,
	390	FILE_SHARE_READ, NULL,
	391	create_flags, overlapped, NULL);
	392	if (s->hfile == INVALID_HANDLE_VALUE) {
	393	int err = GetLastError();
	394
	395	if (err == ERROR_ACCESS_DENIED)
	396	return -EACCES;
	397	return -1;
	398	}
	399	return 0;
	400	}
	401
336c1c12 KW	402	static int hdev_has_zero_init(BlockDriverState *bs)
	403	{
	404	return 0;
	405	}
	406
5efa9d5a	407	static BlockDriver bdrv_host_device = {
e60f469c	408	.format_name = "host_device",
84a12e66	409	.protocol_name = "host_device",
e60f469c	410	.instance_size = sizeof(BDRVRawState),
508c7cb3	411	.bdrv_probe_device = hdev_probe_device,
66f82cee	412	.bdrv_file_open = hdev_open,
e60f469c	413	.bdrv_close = raw_close,
336c1c12	414	.bdrv_has_zero_init = hdev_has_zero_init,
223d4670	415
c68b89ac KW	416	.bdrv_read = raw_read,
	417	.bdrv_write = raw_write,
	418	.bdrv_co_flush_to_disk = raw_flush,
	419
e60f469c	420	.bdrv_getlength = raw_getlength,
4a1d5e1f FZ	421	.bdrv_get_allocated_file_size
4a1d5e1f FZ	422	= raw_get_allocated_file_size,
223d4670	423	};
5efa9d5a	424
84a12e66	425	static void bdrv_file_init(void)
5efa9d5a	426	{
84a12e66	427	bdrv_register(&bdrv_file);
5efa9d5a AL	428	bdrv_register(&bdrv_host_device);
	429	}
	430
84a12e66	431	block_init(bdrv_file_init);