[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 void raw_parse_flags(int flags, int *access_flags, DWORD *overlapped)
{
    assert(access_flags != NULL);
    assert(overlapped != NULL);

    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;
    }
}

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

    s->type = FTYPE_FILE;

    raw_parse_flags(flags, &access_flags, &overlapped);

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

    raw_parse_flags(flags, &access_flags, &overlapped);

    create_flags = OPEN_EXISTING;

    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
6a8dc042 JC	80	static void raw_parse_flags(int flags, int access_flags, DWORD overlapped)
	81	{
	82	assert(access_flags != NULL);
	83	assert(overlapped != NULL);
	84
	85	if (flags & BDRV_O_RDWR) {
	86	*access_flags = GENERIC_READ \| GENERIC_WRITE;
	87	} else {
	88	*access_flags = GENERIC_READ;
	89	}
	90
	91	*overlapped = FILE_ATTRIBUTE_NORMAL;
	92	if (flags & BDRV_O_NOCACHE) {
	93	*overlapped \|= FILE_FLAG_NO_BUFFERING;
	94	}
6a8dc042 JC	95	}
6a8dc042 JC	96
223d4670 TS	97	static int raw_open(BlockDriverState bs, const char filename, int flags)
	98	{
	99	BDRVRawState *s = bs->opaque;
9a2d77ad	100	int access_flags;
223d4670 TS	101	DWORD overlapped;
	102
	103	s->type = FTYPE_FILE;
	104
6a8dc042	105	raw_parse_flags(flags, &access_flags, &overlapped);
9a2d77ad	106
223d4670 TS	107	s->hfile = CreateFile(filename, access_flags,
223d4670 TS	108	FILE_SHARE_READ, NULL,
9a2d77ad	109	OPEN_EXISTING, overlapped, NULL);
223d4670 TS	110	if (s->hfile == INVALID_HANDLE_VALUE) {
	111	int err = GetLastError();
	112
	113	if (err == ERROR_ACCESS_DENIED)
	114	return -EACCES;
	115	return -1;
	116	}
	117	return 0;
	118	}
	119
eda578e5 AL	120	static int raw_read(BlockDriverState *bs, int64_t sector_num,
eda578e5 AL	121	uint8_t *buf, int nb_sectors)
223d4670 TS	122	{
	123	BDRVRawState *s = bs->opaque;
	124	OVERLAPPED ov;
	125	DWORD ret_count;
	126	int ret;
eda578e5 AL	127	int64_t offset = sector_num * 512;
eda578e5 AL	128	int count = nb_sectors * 512;
223d4670 TS	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);
9c39be47 AL	134	if (!ret)
9c39be47 AL	135	return ret_count;
537a1d4b AL	136	if (ret_count == count)
537a1d4b AL	137	ret_count = 0;
223d4670 TS	138	return ret_count;
	139	}
	140
eda578e5 AL	141	static int raw_write(BlockDriverState *bs, int64_t sector_num,
eda578e5 AL	142	const uint8_t *buf, int nb_sectors)
223d4670 TS	143	{
	144	BDRVRawState *s = bs->opaque;
	145	OVERLAPPED ov;
	146	DWORD ret_count;
	147	int ret;
eda578e5 AL	148	int64_t offset = sector_num * 512;
eda578e5 AL	149	int count = nb_sectors * 512;
223d4670 TS	150
	151	memset(&ov, 0, sizeof(ov));
	152	ov.Offset = offset;
	153	ov.OffsetHigh = offset >> 32;
	154	ret = WriteFile(s->hfile, buf, count, &ret_count, &ov);
9c39be47 AL	155	if (!ret)
9c39be47 AL	156	return ret_count;
537a1d4b AL	157	if (ret_count == count)
537a1d4b AL	158	ret_count = 0;
223d4670 TS	159	return ret_count;
	160	}
	161
cfd07e7a	162	static int raw_flush(BlockDriverState *bs)
223d4670 TS	163	{
223d4670 TS	164	BDRVRawState *s = bs->opaque;
205ef796 KW	165	int ret;
	166
	167	ret = FlushFileBuffers(s->hfile);
1b40bbd1	168	if (ret == 0) {
205ef796 KW	169	return -EIO;
	170	}
	171
	172	return 0;
223d4670 TS	173	}
	174
	175	static void raw_close(BlockDriverState *bs)
	176	{
	177	BDRVRawState *s = bs->opaque;
	178	CloseHandle(s->hfile);
	179	}
	180
	181	static int raw_truncate(BlockDriverState *bs, int64_t offset)
	182	{
	183	BDRVRawState *s = bs->opaque;
b9e82a59	184	LONG low, high;
223d4670 TS	185
	186	low = offset;
	187	high = offset >> 32;
	188	if (!SetFilePointer(s->hfile, low, &high, FILE_BEGIN))
	189	return -EIO;
	190	if (!SetEndOfFile(s->hfile))
	191	return -EIO;
	192	return 0;
	193	}
	194
	195	static int64_t raw_getlength(BlockDriverState *bs)
	196	{
	197	BDRVRawState *s = bs->opaque;
	198	LARGE_INTEGER l;
	199	ULARGE_INTEGER available, total, total_free;
	200	DISK_GEOMETRY_EX dg;
	201	DWORD count;
	202	BOOL status;
	203
	204	switch(s->type) {
	205	case FTYPE_FILE:
b9e82a59	206	l.LowPart = GetFileSize(s->hfile, (PDWORD)&l.HighPart);
223d4670 TS	207	if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
	208	return -EIO;
	209	break;
	210	case FTYPE_CD:
	211	if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free))
	212	return -EIO;
	213	l.QuadPart = total.QuadPart;
	214	break;
	215	case FTYPE_HARDDISK:
	216	status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
	217	NULL, 0, &dg, sizeof(dg), &count, NULL);
	218	if (status != 0) {
	219	l = dg.DiskSize;
	220	}
	221	break;
	222	default:
	223	return -EIO;
	224	}
	225	return l.QuadPart;
	226	}
	227
4a1d5e1f FZ	228	static int64_t raw_get_allocated_file_size(BlockDriverState *bs)
	229	{
	230	typedef DWORD (WINAPI * get_compressed_t)(const char *filename,
	231	DWORD * high);
	232	get_compressed_t get_compressed;
	233	struct _stati64 st;
	234	const char *filename = bs->filename;
	235	/* WinNT support GetCompressedFileSize to determine allocate size */
	236	get_compressed =
	237	(get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"),
	238	"GetCompressedFileSizeA");
	239	if (get_compressed) {
	240	DWORD high, low;
	241	low = get_compressed(filename, &high);
	242	if (low != 0xFFFFFFFFlu \|\| GetLastError() == NO_ERROR) {
	243	return (((int64_t) high) << 32) + low;
	244	}
	245	}
	246
	247	if (_stati64(filename, &st) < 0) {
	248	return -1;
	249	}
	250	return st.st_size;
	251	}
	252
0e7e1989	253	static int raw_create(const char filename, QEMUOptionParameter options)
223d4670 TS	254	{
223d4670 TS	255	int fd;
0e7e1989	256	int64_t total_size = 0;
223d4670	257
0e7e1989 KW	258	/* Read out options */
	259	while (options && options->name) {
	260	if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
	261	total_size = options->value.n / 512;
	262	}
	263	options++;
	264	}
223d4670	265
6165f4d8 CB	266	fd = qemu_open(filename, O_WRONLY \| O_CREAT \| O_TRUNC \| O_BINARY,
6165f4d8 CB	267	0644);
223d4670 TS	268	if (fd < 0)
	269	return -EIO;
	270	set_sparse(fd);
	271	ftruncate(fd, total_size * 512);
2e1e79da	272	qemu_close(fd);
223d4670 TS	273	return 0;
	274	}
	275
0e7e1989	276	static QEMUOptionParameter raw_create_options[] = {
db08adf5 KW	277	{
	278	.name = BLOCK_OPT_SIZE,
	279	.type = OPT_SIZE,
	280	.help = "Virtual disk size"
	281	},
0e7e1989 KW	282	{ NULL }
	283	};
	284
84a12e66 CH	285	static BlockDriver bdrv_file = {
	286	.format_name = "file",
	287	.protocol_name = "file",
f1b2f712	288	.instance_size = sizeof(BDRVRawState),
66f82cee	289	.bdrv_file_open = raw_open,
f1b2f712 AL	290	.bdrv_close = raw_close,
f1b2f712 AL	291	.bdrv_create = raw_create,
c68b89ac KW	292
	293	.bdrv_read = raw_read,
	294	.bdrv_write = raw_write,
	295	.bdrv_co_flush_to_disk = raw_flush,
	296
f1b2f712 AL	297	.bdrv_truncate = raw_truncate,
f1b2f712 AL	298	.bdrv_getlength = raw_getlength,
4a1d5e1f FZ	299	.bdrv_get_allocated_file_size
4a1d5e1f FZ	300	= raw_get_allocated_file_size,
0e7e1989 KW	301
0e7e1989 KW	302	.create_options = raw_create_options,
223d4670 TS	303	};
	304
	305	/***********************************************/
	306	/* host device */
	307
	308	static int find_cdrom(char *cdrom_name, int cdrom_name_size)
	309	{
	310	char drives[256], *pdrv = drives;
	311	UINT type;
	312
	313	memset(drives, 0, sizeof(drives));
	314	GetLogicalDriveStrings(sizeof(drives), drives);
	315	while(pdrv[0] != '\0') {
	316	type = GetDriveType(pdrv);
	317	switch(type) {
	318	case DRIVE_CDROM:
	319	snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]);
	320	return 0;
	321	break;
	322	}
	323	pdrv += lstrlen(pdrv) + 1;
	324	}
	325	return -1;
	326	}
	327
	328	static int find_device_type(BlockDriverState bs, const char filename)
	329	{
	330	BDRVRawState *s = bs->opaque;
	331	UINT type;
	332	const char *p;
	333
	334	if (strstart(filename, "\\\\.\\", &p) \|\|
	335	strstart(filename, "//./", &p)) {
	336	if (stristart(p, "PhysicalDrive", NULL))
	337	return FTYPE_HARDDISK;
	338	snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]);
	339	type = GetDriveType(s->drive_path);
3060cd14 AL	340	switch (type) {
	341	case DRIVE_REMOVABLE:
	342	case DRIVE_FIXED:
	343	return FTYPE_HARDDISK;
	344	case DRIVE_CDROM:
223d4670	345	return FTYPE_CD;
3060cd14	346	default:
223d4670	347	return FTYPE_FILE;
3060cd14	348	}
223d4670 TS	349	} else {
	350	return FTYPE_FILE;
	351	}
	352	}
	353
508c7cb3 CH	354	static int hdev_probe_device(const char *filename)
	355	{
	356	if (strstart(filename, "/dev/cdrom", NULL))
	357	return 100;
	358	if (is_windows_drive(filename))
	359	return 100;
	360	return 0;
	361	}
	362
223d4670 TS	363	static int hdev_open(BlockDriverState bs, const char filename, int flags)
	364	{
	365	BDRVRawState *s = bs->opaque;
	366	int access_flags, create_flags;
	367	DWORD overlapped;
	368	char device_name[64];
	369
	370	if (strstart(filename, "/dev/cdrom", NULL)) {
	371	if (find_cdrom(device_name, sizeof(device_name)) < 0)
	372	return -ENOENT;
	373	filename = device_name;
	374	} else {
	375	/* transform drive letters into device name */
	376	if (((filename[0] >= 'a' && filename[0] <= 'z') \|\|
	377	(filename[0] >= 'A' && filename[0] <= 'Z')) &&
	378	filename[1] == ':' && filename[2] == '\0') {
	379	snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]);
	380	filename = device_name;
	381	}
	382	}
	383	s->type = find_device_type(bs, filename);
	384
6a8dc042 JC	385	raw_parse_flags(flags, &access_flags, &overlapped);
6a8dc042 JC	386
223d4670 TS	387	create_flags = OPEN_EXISTING;
223d4670 TS	388
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);