[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;
    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_flush		= raw_flush,
    .bdrv_read		= raw_read,
    .bdrv_write		= raw_write,
    .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;
}

#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 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_flush		= raw_flush,
    .bdrv_has_zero_init = hdev_has_zero_init,

    .bdrv_read		= raw_read,
    .bdrv_write	        = raw_write,
    .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;
	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;
a6599793 CH	91	if (flags & BDRV_O_NOCACHE)
	92	overlapped \|= FILE_FLAG_NO_BUFFERING;
	93	if (!(flags & BDRV_O_CACHE_WB))
9f7965c7	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
cfd07e7a	150	static int raw_flush(BlockDriverState *bs)
223d4670 TS	151	{
223d4670 TS	152	BDRVRawState *s = bs->opaque;
205ef796 KW	153	int ret;
	154
	155	ret = FlushFileBuffers(s->hfile);
1b40bbd1	156	if (ret == 0) {
205ef796 KW	157	return -EIO;
	158	}
	159
	160	return 0;
223d4670 TS	161	}
	162
	163	static void raw_close(BlockDriverState *bs)
	164	{
	165	BDRVRawState *s = bs->opaque;
	166	CloseHandle(s->hfile);
	167	}
	168
	169	static int raw_truncate(BlockDriverState *bs, int64_t offset)
	170	{
	171	BDRVRawState *s = bs->opaque;
b9e82a59	172	LONG low, high;
223d4670 TS	173
	174	low = offset;
	175	high = offset >> 32;
	176	if (!SetFilePointer(s->hfile, low, &high, FILE_BEGIN))
	177	return -EIO;
	178	if (!SetEndOfFile(s->hfile))
	179	return -EIO;
	180	return 0;
	181	}
	182
	183	static int64_t raw_getlength(BlockDriverState *bs)
	184	{
	185	BDRVRawState *s = bs->opaque;
	186	LARGE_INTEGER l;
	187	ULARGE_INTEGER available, total, total_free;
	188	DISK_GEOMETRY_EX dg;
	189	DWORD count;
	190	BOOL status;
	191
	192	switch(s->type) {
	193	case FTYPE_FILE:
b9e82a59	194	l.LowPart = GetFileSize(s->hfile, (PDWORD)&l.HighPart);
223d4670 TS	195	if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
	196	return -EIO;
	197	break;
	198	case FTYPE_CD:
	199	if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free))
	200	return -EIO;
	201	l.QuadPart = total.QuadPart;
	202	break;
	203	case FTYPE_HARDDISK:
	204	status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
	205	NULL, 0, &dg, sizeof(dg), &count, NULL);
	206	if (status != 0) {
	207	l = dg.DiskSize;
	208	}
	209	break;
	210	default:
	211	return -EIO;
	212	}
	213	return l.QuadPart;
	214	}
	215
4a1d5e1f FZ	216	static int64_t raw_get_allocated_file_size(BlockDriverState *bs)
	217	{
	218	typedef DWORD (WINAPI * get_compressed_t)(const char *filename,
	219	DWORD * high);
	220	get_compressed_t get_compressed;
	221	struct _stati64 st;
	222	const char *filename = bs->filename;
	223	/* WinNT support GetCompressedFileSize to determine allocate size */
	224	get_compressed =
	225	(get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"),
	226	"GetCompressedFileSizeA");
	227	if (get_compressed) {
	228	DWORD high, low;
	229	low = get_compressed(filename, &high);
	230	if (low != 0xFFFFFFFFlu \|\| GetLastError() == NO_ERROR) {
	231	return (((int64_t) high) << 32) + low;
	232	}
	233	}
	234
	235	if (_stati64(filename, &st) < 0) {
	236	return -1;
	237	}
	238	return st.st_size;
	239	}
	240
0e7e1989	241	static int raw_create(const char filename, QEMUOptionParameter options)
223d4670 TS	242	{
223d4670 TS	243	int fd;
0e7e1989	244	int64_t total_size = 0;
223d4670	245
0e7e1989 KW	246	/* Read out options */
	247	while (options && options->name) {
	248	if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
	249	total_size = options->value.n / 512;
	250	}
	251	options++;
	252	}
223d4670 TS	253
	254	fd = open(filename, O_WRONLY \| O_CREAT \| O_TRUNC \| O_BINARY,
	255	0644);
	256	if (fd < 0)
	257	return -EIO;
	258	set_sparse(fd);
	259	ftruncate(fd, total_size * 512);
	260	close(fd);
	261	return 0;
	262	}
	263
0e7e1989	264	static QEMUOptionParameter raw_create_options[] = {
db08adf5 KW	265	{
	266	.name = BLOCK_OPT_SIZE,
	267	.type = OPT_SIZE,
	268	.help = "Virtual disk size"
	269	},
0e7e1989 KW	270	{ NULL }
	271	};
	272
84a12e66 CH	273	static BlockDriver bdrv_file = {
	274	.format_name = "file",
	275	.protocol_name = "file",
f1b2f712	276	.instance_size = sizeof(BDRVRawState),
66f82cee	277	.bdrv_file_open = raw_open,
f1b2f712 AL	278	.bdrv_close = raw_close,
	279	.bdrv_create = raw_create,
	280	.bdrv_flush = raw_flush,
	281	.bdrv_read = raw_read,
	282	.bdrv_write = raw_write,
	283	.bdrv_truncate = raw_truncate,
	284	.bdrv_getlength = raw_getlength,
4a1d5e1f FZ	285	.bdrv_get_allocated_file_size
4a1d5e1f FZ	286	= raw_get_allocated_file_size,
0e7e1989 KW	287
0e7e1989 KW	288	.create_options = raw_create_options,
223d4670 TS	289	};
	290
	291	/***********************************************/
	292	/* host device */
	293
	294	static int find_cdrom(char *cdrom_name, int cdrom_name_size)
	295	{
	296	char drives[256], *pdrv = drives;
	297	UINT type;
	298
	299	memset(drives, 0, sizeof(drives));
	300	GetLogicalDriveStrings(sizeof(drives), drives);
	301	while(pdrv[0] != '\0') {
	302	type = GetDriveType(pdrv);
	303	switch(type) {
	304	case DRIVE_CDROM:
	305	snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]);
	306	return 0;
	307	break;
	308	}
	309	pdrv += lstrlen(pdrv) + 1;
	310	}
	311	return -1;
	312	}
	313
	314	static int find_device_type(BlockDriverState bs, const char filename)
	315	{
	316	BDRVRawState *s = bs->opaque;
	317	UINT type;
	318	const char *p;
	319
	320	if (strstart(filename, "\\\\.\\", &p) \|\|
	321	strstart(filename, "//./", &p)) {
	322	if (stristart(p, "PhysicalDrive", NULL))
	323	return FTYPE_HARDDISK;
	324	snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]);
	325	type = GetDriveType(s->drive_path);
3060cd14 AL	326	switch (type) {
	327	case DRIVE_REMOVABLE:
	328	case DRIVE_FIXED:
	329	return FTYPE_HARDDISK;
	330	case DRIVE_CDROM:
223d4670	331	return FTYPE_CD;
3060cd14	332	default:
223d4670	333	return FTYPE_FILE;
3060cd14	334	}
223d4670 TS	335	} else {
	336	return FTYPE_FILE;
	337	}
	338	}
	339
508c7cb3 CH	340	static int hdev_probe_device(const char *filename)
	341	{
	342	if (strstart(filename, "/dev/cdrom", NULL))
	343	return 100;
	344	if (is_windows_drive(filename))
	345	return 100;
	346	return 0;
	347	}
	348
223d4670 TS	349	static int hdev_open(BlockDriverState bs, const char filename, int flags)
	350	{
	351	BDRVRawState *s = bs->opaque;
	352	int access_flags, create_flags;
	353	DWORD overlapped;
	354	char device_name[64];
	355
	356	if (strstart(filename, "/dev/cdrom", NULL)) {
	357	if (find_cdrom(device_name, sizeof(device_name)) < 0)
	358	return -ENOENT;
	359	filename = device_name;
	360	} else {
	361	/* transform drive letters into device name */
	362	if (((filename[0] >= 'a' && filename[0] <= 'z') \|\|
	363	(filename[0] >= 'A' && filename[0] <= 'Z')) &&
	364	filename[1] == ':' && filename[2] == '\0') {
	365	snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]);
	366	filename = device_name;
	367	}
	368	}
	369	s->type = find_device_type(bs, filename);
	370
f5edb014	371	if (flags & BDRV_O_RDWR) {
223d4670 TS	372	access_flags = GENERIC_READ \| GENERIC_WRITE;
	373	} else {
	374	access_flags = GENERIC_READ;
	375	}
	376	create_flags = OPEN_EXISTING;
	377
03ff3ca3	378	overlapped = FILE_ATTRIBUTE_NORMAL;
a6599793 CH	379	if (flags & BDRV_O_NOCACHE)
	380	overlapped \|= FILE_FLAG_NO_BUFFERING;
	381	if (!(flags & BDRV_O_CACHE_WB))
9f7965c7	382	overlapped \|= FILE_FLAG_WRITE_THROUGH;
223d4670 TS	383	s->hfile = CreateFile(filename, access_flags,
	384	FILE_SHARE_READ, NULL,
	385	create_flags, overlapped, NULL);
	386	if (s->hfile == INVALID_HANDLE_VALUE) {
	387	int err = GetLastError();
	388
	389	if (err == ERROR_ACCESS_DENIED)
	390	return -EACCES;
	391	return -1;
	392	}
	393	return 0;
	394	}
	395
	396	#if 0
	397	/***********************************************/
	398	/* removable device additional commands */
	399
	400	static int raw_is_inserted(BlockDriverState *bs)
	401	{
	402	return 1;
	403	}
	404
	405	static int raw_media_changed(BlockDriverState *bs)
	406	{
	407	return -ENOTSUP;
	408	}
	409
	410	static int raw_eject(BlockDriverState *bs, int eject_flag)
	411	{
	412	DWORD ret_count;
	413
	414	if (s->type == FTYPE_FILE)
	415	return -ENOTSUP;
	416	if (eject_flag) {
	417	DeviceIoControl(s->hfile, IOCTL_STORAGE_EJECT_MEDIA,
	418	NULL, 0, NULL, 0, &lpBytesReturned, NULL);
	419	} else {
	420	DeviceIoControl(s->hfile, IOCTL_STORAGE_LOAD_MEDIA,
	421	NULL, 0, NULL, 0, &lpBytesReturned, NULL);
	422	}
	423	}
	424
	425	static int raw_set_locked(BlockDriverState *bs, int locked)
	426	{
	427	return -ENOTSUP;
	428	}
	429	#endif
	430
336c1c12 KW	431	static int hdev_has_zero_init(BlockDriverState *bs)
	432	{
	433	return 0;
	434	}
	435
5efa9d5a	436	static BlockDriver bdrv_host_device = {
e60f469c	437	.format_name = "host_device",
84a12e66	438	.protocol_name = "host_device",
e60f469c	439	.instance_size = sizeof(BDRVRawState),
508c7cb3	440	.bdrv_probe_device = hdev_probe_device,
66f82cee	441	.bdrv_file_open = hdev_open,
e60f469c AJ	442	.bdrv_close = raw_close,
e60f469c AJ	443	.bdrv_flush = raw_flush,
336c1c12	444	.bdrv_has_zero_init = hdev_has_zero_init,
223d4670	445
eda578e5 AL	446	.bdrv_read = raw_read,
eda578e5 AL	447	.bdrv_write = raw_write,
e60f469c	448	.bdrv_getlength = raw_getlength,
4a1d5e1f FZ	449	.bdrv_get_allocated_file_size
4a1d5e1f FZ	450	= raw_get_allocated_file_size,
223d4670	451	};
5efa9d5a	452
84a12e66	453	static void bdrv_file_init(void)
5efa9d5a	454	{
84a12e66	455	bdrv_register(&bdrv_file);
5efa9d5a AL	456	bdrv_register(&bdrv_host_device);
	457	}
	458
84a12e66	459	block_init(bdrv_file_init);