[qemu.git] / block-raw-win32.c

/*
 * Block driver for RAW files (win32)
 *
 * Copyright (c) 2006 Fabrice Bellard
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#include "qemu-common.h"
#include "qemu-timer.h"
#include "block_int.h"
#include <assert.h>
#include <winioctl.h>

//#define WIN32_AIO

#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;

typedef struct RawAIOCB {
    BlockDriverAIOCB common;
    HANDLE hEvent;
    OVERLAPPED ov;
    int count;
} RawAIOCB;

int qemu_ftruncate64(int fd, int64_t length)
{
    LARGE_INTEGER li;
    LONG high;
    HANDLE h;
    BOOL res;

    if ((GetVersion() & 0x80000000UL) && (length >> 32) != 0)
	return -1;

    h = (HANDLE)_get_osfhandle(fd);

    /* get current position, ftruncate do not change position */
    li.HighPart = 0;
    li.LowPart = SetFilePointer (h, 0, &li.HighPart, FILE_CURRENT);
    if (li.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
	return -1;

    high = length >> 32;
    if (!SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN))
	return -1;
    res = SetEndOfFile(h);

    /* back to old position */
    SetFilePointer(h, li.LowPart, &li.HighPart, FILE_BEGIN);
    return res ? 0 : -1;
}

static int set_sparse(int fd)
{
    DWORD returned;
    return (int) DeviceIoControl((HANDLE)_get_osfhandle(fd), FSCTL_SET_SPARSE,
				 NULL, 0, NULL, 0, &returned, NULL);
}

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

    s->type = FTYPE_FILE;

    if ((flags & BDRV_O_ACCESS) == O_RDWR) {
        access_flags = GENERIC_READ | GENERIC_WRITE;
    } else {
        access_flags = GENERIC_READ;
    }
    if (flags & BDRV_O_CREAT) {
        create_flags = CREATE_ALWAYS;
    } else {
        create_flags = OPEN_EXISTING;
    }
#ifdef WIN32_AIO
    overlapped = FILE_FLAG_OVERLAPPED;
#else
    overlapped = FILE_ATTRIBUTE_NORMAL;
#endif
    if ((flags & BDRV_O_NOCACHE))
        overlapped |= FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH;
    else if (!(flags & BDRV_O_CACHE_WB))
        overlapped |= FILE_FLAG_WRITE_THROUGH;
    s->hfile = CreateFile(filename, access_flags,
                          FILE_SHARE_READ, NULL,
                          create_flags, overlapped, NULL);
    if (s->hfile == INVALID_HANDLE_VALUE) {
        int err = GetLastError();

        if (err == ERROR_ACCESS_DENIED)
            return -EACCES;
        return -1;
    }
    return 0;
}

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

    memset(&ov, 0, sizeof(ov));
    ov.Offset = offset;
    ov.OffsetHigh = offset >> 32;
    ret = ReadFile(s->hfile, buf, count, &ret_count, &ov);
    if (!ret) {
#ifdef WIN32_AIO
        ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
        if (!ret)
            return -EIO;
        else
#endif
            return ret_count;
    }
    return ret_count;
}

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

    memset(&ov, 0, sizeof(ov));
    ov.Offset = offset;
    ov.OffsetHigh = offset >> 32;
    ret = WriteFile(s->hfile, buf, count, &ret_count, &ov);
    if (!ret) {
#ifdef WIN32_AIO
        ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
        if (!ret)
            return -EIO;
        else
#endif
            return ret_count;
    }
    return ret_count;
}

#ifdef WIN32_AIO
static void raw_aio_cb(void *opaque)
{
    RawAIOCB *acb = opaque;
    BlockDriverState *bs = acb->common.bs;
    BDRVRawState *s = bs->opaque;
    DWORD ret_count;
    int ret;

    ret = GetOverlappedResult(s->hfile, &acb->ov, &ret_count, TRUE);
    if (!ret || ret_count != acb->count) {
        acb->common.cb(acb->common.opaque, -EIO);
    } else {
        acb->common.cb(acb->common.opaque, 0);
    }
}

static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
        int64_t sector_num, uint8_t *buf, int nb_sectors,
        BlockDriverCompletionFunc *cb, void *opaque)
{
    RawAIOCB *acb;
    int64_t offset;

    acb = qemu_aio_get(bs, cb, opaque);
    if (acb->hEvent) {
        acb->hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
        if (!acb->hEvent) {
            qemu_aio_release(acb);
            return NULL;
        }
    }
    memset(&acb->ov, 0, sizeof(acb->ov));
    offset = sector_num * 512;
    acb->ov.Offset = offset;
    acb->ov.OffsetHigh = offset >> 32;
    acb->ov.hEvent = acb->hEvent;
    acb->count = nb_sectors * 512;
    qemu_add_wait_object(acb->ov.hEvent, raw_aio_cb, acb);
    return acb;
}

static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
        int64_t sector_num, uint8_t *buf, int nb_sectors,
        BlockDriverCompletionFunc *cb, void *opaque)
{
    BDRVRawState *s = bs->opaque;
    RawAIOCB *acb;
    int ret;

    acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
    if (!acb)
        return NULL;
    ret = ReadFile(s->hfile, buf, acb->count, NULL, &acb->ov);
    if (!ret) {
        qemu_aio_release(acb);
        return NULL;
    }
    qemu_aio_release(acb);
    return (BlockDriverAIOCB *)acb;
}

static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
        int64_t sector_num, uint8_t *buf, int nb_sectors,
        BlockDriverCompletionFunc *cb, void *opaque)
{
    BDRVRawState *s = bs->opaque;
    RawAIOCB *acb;
    int ret;

    acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
    if (!acb)
        return NULL;
    ret = WriteFile(s->hfile, buf, acb->count, NULL, &acb->ov);
    if (!ret) {
        qemu_aio_release(acb);
        return NULL;
    }
    qemu_aio_release(acb);
    return (BlockDriverAIOCB *)acb;
}

static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
{
    RawAIOCB *acb = (RawAIOCB *)blockacb;
    BlockDriverState *bs = acb->common.bs;
    BDRVRawState *s = bs->opaque;

    qemu_del_wait_object(acb->ov.hEvent, raw_aio_cb, acb);
    /* XXX: if more than one async I/O it is not correct */
    CancelIo(s->hfile);
    qemu_aio_release(acb);
}
#endif /* #if WIN32_AIO */

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;
    DWORD 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, &l.HighPart);
        if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
            return -EIO;
        break;
    case FTYPE_CD:
        if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free))
            return -EIO;
        l.QuadPart = total.QuadPart;
        break;
    case FTYPE_HARDDISK:
        status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
                                 NULL, 0, &dg, sizeof(dg), &count, NULL);
        if (status != 0) {
            l = dg.DiskSize;
        }
        break;
    default:
        return -EIO;
    }
    return l.QuadPart;
}

static int raw_create(const char *filename, int64_t total_size,
                      const char *backing_file, int flags)
{
    int fd;

    if (flags || backing_file)
        return -ENOTSUP;

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

BlockDriver bdrv_raw = {
    "raw",
    sizeof(BDRVRawState),
    NULL, /* no probe for protocols */
    raw_open,
    NULL,
    NULL,
    raw_close,
    raw_create,
    raw_flush,

#ifdef WIN32_AIO
    .bdrv_aio_read = raw_aio_read,
    .bdrv_aio_write = raw_aio_write,
    .bdrv_aio_cancel = raw_aio_cancel,
    .aiocb_size = sizeof(RawAIOCB);
#endif
    .bdrv_pread = raw_pread,
    .bdrv_pwrite = raw_pwrite,
    .bdrv_truncate = raw_truncate,
    .bdrv_getlength = raw_getlength,
};

/***********************************************/
/* host device */

static int find_cdrom(char *cdrom_name, int cdrom_name_size)
{
    char drives[256], *pdrv = drives;
    UINT type;

    memset(drives, 0, sizeof(drives));
    GetLogicalDriveStrings(sizeof(drives), drives);
    while(pdrv[0] != '\0') {
        type = GetDriveType(pdrv);
        switch(type) {
        case DRIVE_CDROM:
            snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]);
            return 0;
            break;
        }
        pdrv += lstrlen(pdrv) + 1;
    }
    return -1;
}

static int find_device_type(BlockDriverState *bs, const char *filename)
{
    BDRVRawState *s = bs->opaque;
    UINT type;
    const char *p;

    if (strstart(filename, "\\\\.\\", &p) ||
        strstart(filename, "//./", &p)) {
        if (stristart(p, "PhysicalDrive", NULL))
            return FTYPE_HARDDISK;
        snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]);
        type = GetDriveType(s->drive_path);
        if (type == DRIVE_CDROM)
            return FTYPE_CD;
        else
            return FTYPE_FILE;
    } else {
        return FTYPE_FILE;
    }
}

static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
{
    BDRVRawState *s = bs->opaque;
    int access_flags, create_flags;
    DWORD overlapped;
    char device_name[64];

    if (strstart(filename, "/dev/cdrom", NULL)) {
        if (find_cdrom(device_name, sizeof(device_name)) < 0)
            return -ENOENT;
        filename = device_name;
    } else {
        /* transform drive letters into device name */
        if (((filename[0] >= 'a' && filename[0] <= 'z') ||
             (filename[0] >= 'A' && filename[0] <= 'Z')) &&
            filename[1] == ':' && filename[2] == '\0') {
            snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]);
            filename = device_name;
        }
    }
    s->type = find_device_type(bs, filename);

    if ((flags & BDRV_O_ACCESS) == O_RDWR) {
        access_flags = GENERIC_READ | GENERIC_WRITE;
    } else {
        access_flags = GENERIC_READ;
    }
    create_flags = OPEN_EXISTING;

#ifdef WIN32_AIO
    overlapped = FILE_FLAG_OVERLAPPED;
#else
    overlapped = FILE_ATTRIBUTE_NORMAL;
#endif
    if ((flags & BDRV_O_NOCACHE))
        overlapped |= FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH;
    else if (!(flags & BDRV_O_CACHE_WB))
        overlapped |= FILE_FLAG_WRITE_THROUGH;
    s->hfile = CreateFile(filename, access_flags,
                          FILE_SHARE_READ, NULL,
                          create_flags, overlapped, NULL);
    if (s->hfile == INVALID_HANDLE_VALUE) {
        int err = GetLastError();

        if (err == ERROR_ACCESS_DENIED)
            return -EACCES;
        return -1;
    }
    return 0;
}

#if 0
/***********************************************/
/* removable device additional commands */

static int raw_is_inserted(BlockDriverState *bs)
{
    return 1;
}

static int raw_media_changed(BlockDriverState *bs)
{
    return -ENOTSUP;
}

static int raw_eject(BlockDriverState *bs, int eject_flag)
{
    DWORD ret_count;

    if (s->type == FTYPE_FILE)
        return -ENOTSUP;
    if (eject_flag) {
        DeviceIoControl(s->hfile, IOCTL_STORAGE_EJECT_MEDIA,
                        NULL, 0, NULL, 0, &lpBytesReturned, NULL);
    } else {
        DeviceIoControl(s->hfile, IOCTL_STORAGE_LOAD_MEDIA,
                        NULL, 0, NULL, 0, &lpBytesReturned, NULL);
    }
}

static int raw_set_locked(BlockDriverState *bs, int locked)
{
    return -ENOTSUP;
}
#endif

BlockDriver bdrv_host_device = {
    "host_device",
    sizeof(BDRVRawState),
    NULL, /* no probe for protocols */
    hdev_open,
    NULL,
    NULL,
    raw_close,
    NULL,
    raw_flush,

#ifdef WIN32_AIO
    .bdrv_aio_read = raw_aio_read,
    .bdrv_aio_write = raw_aio_write,
    .bdrv_aio_cancel = raw_aio_cancel,
    .aiocb_size = sizeof(RawAIOCB);
#endif
    .bdrv_pread = raw_pread,
    .bdrv_pwrite = raw_pwrite,
    .bdrv_getlength = raw_getlength,
};
Commit	Line	Data
223d4670 TS	1	/*
	2	* Block driver for RAW files (win32)
	3	*
	4	* Copyright (c) 2006 Fabrice Bellard
	5	*
	6	* Permission is hereby granted, free of charge, to any person obtaining a copy
	7	* of this software and associated documentation files (the "Software"), to deal
	8	* in the Software without restriction, including without limitation the rights
	9	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	10	* copies of the Software, and to permit persons to whom the Software is
	11	* furnished to do so, subject to the following conditions:
	12	*
	13	* The above copyright notice and this permission notice shall be included in
	14	* all copies or substantial portions of the Software.
	15	*
	16	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	17	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	19	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	20	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	21	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	22	* THE SOFTWARE.
	23	*/
	24	#include "qemu-common.h"
223d4670	25	#include "qemu-timer.h"
223d4670 TS	26	#include "block_int.h"
	27	#include <assert.h>
	28	#include <winioctl.h>
	29
03ff3ca3 AL	30	//#define WIN32_AIO
03ff3ca3 AL	31
223d4670 TS	32	#define FTYPE_FILE 0
	33	#define FTYPE_CD 1
	34	#define FTYPE_HARDDISK 2
	35
	36	typedef struct BDRVRawState {
	37	HANDLE hfile;
	38	int type;
	39	char drive_path[16]; /* format: "d:\" */
	40	} BDRVRawState;
	41
	42	typedef struct RawAIOCB {
	43	BlockDriverAIOCB common;
	44	HANDLE hEvent;
	45	OVERLAPPED ov;
	46	int count;
	47	} RawAIOCB;
	48
	49	int qemu_ftruncate64(int fd, int64_t length)
	50	{
	51	LARGE_INTEGER li;
	52	LONG high;
	53	HANDLE h;
	54	BOOL res;
	55
	56	if ((GetVersion() & 0x80000000UL) && (length >> 32) != 0)
	57	return -1;
	58
	59	h = (HANDLE)_get_osfhandle(fd);
	60
	61	/* get current position, ftruncate do not change position */
	62	li.HighPart = 0;
	63	li.LowPart = SetFilePointer (h, 0, &li.HighPart, FILE_CURRENT);
	64	if (li.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
	65	return -1;
	66
	67	high = length >> 32;
	68	if (!SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN))
	69	return -1;
	70	res = SetEndOfFile(h);
	71
	72	/* back to old position */
	73	SetFilePointer(h, li.LowPart, &li.HighPart, FILE_BEGIN);
	74	return res ? 0 : -1;
	75	}
	76
	77	static int set_sparse(int fd)
	78	{
	79	DWORD returned;
	80	return (int) DeviceIoControl((HANDLE)_get_osfhandle(fd), FSCTL_SET_SPARSE,
	81	NULL, 0, NULL, 0, &returned, NULL);
	82	}
	83
	84	static int raw_open(BlockDriverState bs, const char filename, int flags)
	85	{
	86	BDRVRawState *s = bs->opaque;
	87	int access_flags, create_flags;
	88	DWORD overlapped;
	89
	90	s->type = FTYPE_FILE;
	91
	92	if ((flags & BDRV_O_ACCESS) == O_RDWR) {
	93	access_flags = GENERIC_READ \| GENERIC_WRITE;
	94	} else {
	95	access_flags = GENERIC_READ;
96	}
97	if (flags & BDRV_O_CREAT) {
98	create_flags = CREATE_ALWAYS;
99	} else {
100	create_flags = OPEN_EXISTING;
101	}
03ff3ca3	102	#ifdef WIN32_AIO
223d4670	103	overlapped = FILE_FLAG_OVERLAPPED;
03ff3ca3 AL	104	#else
03ff3ca3 AL	105	overlapped = FILE_ATTRIBUTE_NORMAL;
223d4670	106	#endif
9f7965c7	107	if ((flags & BDRV_O_NOCACHE))
33f00271	108	overlapped \|= FILE_FLAG_NO_BUFFERING \| FILE_FLAG_WRITE_THROUGH;
9f7965c7 AL	109	else if (!(flags & BDRV_O_CACHE_WB))
9f7965c7 AL	110	overlapped \|= FILE_FLAG_WRITE_THROUGH;
223d4670 TS	111	s->hfile = CreateFile(filename, access_flags,
	112	FILE_SHARE_READ, NULL,
	113	create_flags, overlapped, NULL);
	114	if (s->hfile == INVALID_HANDLE_VALUE) {
	115	int err = GetLastError();
	116
	117	if (err == ERROR_ACCESS_DENIED)
	118	return -EACCES;
	119	return -1;
	120	}
	121	return 0;
	122	}
	123
	124	static int raw_pread(BlockDriverState *bs, int64_t offset,
	125	uint8_t *buf, int count)
	126	{
	127	BDRVRawState *s = bs->opaque;
	128	OVERLAPPED ov;
	129	DWORD ret_count;
	130	int ret;
	131
	132	memset(&ov, 0, sizeof(ov));
	133	ov.Offset = offset;
	134	ov.OffsetHigh = offset >> 32;
	135	ret = ReadFile(s->hfile, buf, count, &ret_count, &ov);
	136	if (!ret) {
03ff3ca3	137	#ifdef WIN32_AIO
223d4670 TS	138	ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
	139	if (!ret)
	140	return -EIO;
	141	else
03ff3ca3	142	#endif
223d4670 TS	143	return ret_count;
	144	}
	145	return ret_count;
	146	}
	147
	148	static int raw_pwrite(BlockDriverState *bs, int64_t offset,
	149	const uint8_t *buf, int count)
	150	{
	151	BDRVRawState *s = bs->opaque;
	152	OVERLAPPED ov;
	153	DWORD ret_count;
	154	int ret;
	155
	156	memset(&ov, 0, sizeof(ov));
	157	ov.Offset = offset;
	158	ov.OffsetHigh = offset >> 32;
	159	ret = WriteFile(s->hfile, buf, count, &ret_count, &ov);
	160	if (!ret) {
03ff3ca3	161	#ifdef WIN32_AIO
223d4670 TS	162	ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
	163	if (!ret)
	164	return -EIO;
	165	else
03ff3ca3	166	#endif
223d4670 TS	167	return ret_count;
	168	}
	169	return ret_count;
	170	}
	171
03ff3ca3	172	#ifdef WIN32_AIO
223d4670 TS	173	static void raw_aio_cb(void *opaque)
	174	{
	175	RawAIOCB *acb = opaque;
	176	BlockDriverState *bs = acb->common.bs;
	177	BDRVRawState *s = bs->opaque;
	178	DWORD ret_count;
	179	int ret;
	180
	181	ret = GetOverlappedResult(s->hfile, &acb->ov, &ret_count, TRUE);
	182	if (!ret \|\| ret_count != acb->count) {
	183	acb->common.cb(acb->common.opaque, -EIO);
	184	} else {
	185	acb->common.cb(acb->common.opaque, 0);
	186	}
	187	}
223d4670 TS	188
	189	static RawAIOCB raw_aio_setup(BlockDriverState bs,
	190	int64_t sector_num, uint8_t *buf, int nb_sectors,
	191	BlockDriverCompletionFunc cb, void opaque)
	192	{
	193	RawAIOCB *acb;
	194	int64_t offset;
	195
	196	acb = qemu_aio_get(bs, cb, opaque);
	197	if (acb->hEvent) {
	198	acb->hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
	199	if (!acb->hEvent) {
	200	qemu_aio_release(acb);
	201	return NULL;
	202	}
	203	}
	204	memset(&acb->ov, 0, sizeof(acb->ov));
	205	offset = sector_num * 512;
	206	acb->ov.Offset = offset;
	207	acb->ov.OffsetHigh = offset >> 32;
	208	acb->ov.hEvent = acb->hEvent;
	209	acb->count = nb_sectors * 512;
223d4670	210	qemu_add_wait_object(acb->ov.hEvent, raw_aio_cb, acb);
223d4670 TS	211	return acb;
	212	}
	213
	214	static BlockDriverAIOCB raw_aio_read(BlockDriverState bs,
	215	int64_t sector_num, uint8_t *buf, int nb_sectors,
	216	BlockDriverCompletionFunc cb, void opaque)
	217	{
	218	BDRVRawState *s = bs->opaque;
	219	RawAIOCB *acb;
	220	int ret;
	221
	222	acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
	223	if (!acb)
	224	return NULL;
	225	ret = ReadFile(s->hfile, buf, acb->count, NULL, &acb->ov);
	226	if (!ret) {
	227	qemu_aio_release(acb);
	228	return NULL;
	229	}
223d4670	230	qemu_aio_release(acb);
223d4670 TS	231	return (BlockDriverAIOCB *)acb;
	232	}
	233
	234	static BlockDriverAIOCB raw_aio_write(BlockDriverState bs,
	235	int64_t sector_num, uint8_t *buf, int nb_sectors,
	236	BlockDriverCompletionFunc cb, void opaque)
	237	{
	238	BDRVRawState *s = bs->opaque;
	239	RawAIOCB *acb;
	240	int ret;
	241
	242	acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
	243	if (!acb)
	244	return NULL;
	245	ret = WriteFile(s->hfile, buf, acb->count, NULL, &acb->ov);
	246	if (!ret) {
	247	qemu_aio_release(acb);
	248	return NULL;
	249	}
223d4670	250	qemu_aio_release(acb);
223d4670 TS	251	return (BlockDriverAIOCB *)acb;
	252	}
	253
	254	static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
	255	{
223d4670 TS	256	RawAIOCB acb = (RawAIOCB )blockacb;
	257	BlockDriverState *bs = acb->common.bs;
	258	BDRVRawState *s = bs->opaque;
	259
	260	qemu_del_wait_object(acb->ov.hEvent, raw_aio_cb, acb);
	261	/* XXX: if more than one async I/O it is not correct */
	262	CancelIo(s->hfile);
	263	qemu_aio_release(acb);
223d4670	264	}
03ff3ca3	265	#endif /* #if WIN32_AIO */
223d4670 TS	266
	267	static void raw_flush(BlockDriverState *bs)
	268	{
	269	BDRVRawState *s = bs->opaque;
	270	FlushFileBuffers(s->hfile);
	271	}
	272
	273	static void raw_close(BlockDriverState *bs)
	274	{
	275	BDRVRawState *s = bs->opaque;
	276	CloseHandle(s->hfile);
	277	}
	278
	279	static int raw_truncate(BlockDriverState *bs, int64_t offset)
	280	{
	281	BDRVRawState *s = bs->opaque;
	282	DWORD low, high;
	283
	284	low = offset;
	285	high = offset >> 32;
	286	if (!SetFilePointer(s->hfile, low, &high, FILE_BEGIN))
	287	return -EIO;
	288	if (!SetEndOfFile(s->hfile))
	289	return -EIO;
	290	return 0;
	291	}
	292
	293	static int64_t raw_getlength(BlockDriverState *bs)
	294	{
	295	BDRVRawState *s = bs->opaque;
	296	LARGE_INTEGER l;
	297	ULARGE_INTEGER available, total, total_free;
	298	DISK_GEOMETRY_EX dg;
	299	DWORD count;
	300	BOOL status;
	301
	302	switch(s->type) {
	303	case FTYPE_FILE:
	304	l.LowPart = GetFileSize(s->hfile, &l.HighPart);
	305	if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
	306	return -EIO;
	307	break;
	308	case FTYPE_CD:
	309	if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free))
	310	return -EIO;
	311	l.QuadPart = total.QuadPart;
	312	break;
	313	case FTYPE_HARDDISK:
	314	status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
	315	NULL, 0, &dg, sizeof(dg), &count, NULL);
	316	if (status != 0) {
	317	l = dg.DiskSize;
	318	}
	319	break;
	320	default:
	321	return -EIO;
	322	}
	323	return l.QuadPart;
	324	}
	325
	326	static int raw_create(const char *filename, int64_t total_size,
	327	const char *backing_file, int flags)
	328	{
	329	int fd;
330
331	if (flags \|\| backing_file)
332	return -ENOTSUP;
333
334	fd = open(filename, O_WRONLY \| O_CREAT \| O_TRUNC \| O_BINARY,
335	0644);
336	if (fd < 0)
337	return -EIO;
338	set_sparse(fd);
339	ftruncate(fd, total_size * 512);
340	close(fd);
341	return 0;
342	}
343
223d4670 TS	344	BlockDriver bdrv_raw = {
	345	"raw",
	346	sizeof(BDRVRawState),
	347	NULL, /* no probe for protocols */
	348	raw_open,
	349	NULL,
	350	NULL,
	351	raw_close,
	352	raw_create,
	353	raw_flush,
	354
03ff3ca3	355	#ifdef WIN32_AIO
223d4670 TS	356	.bdrv_aio_read = raw_aio_read,
	357	.bdrv_aio_write = raw_aio_write,
	358	.bdrv_aio_cancel = raw_aio_cancel,
	359	.aiocb_size = sizeof(RawAIOCB);
	360	#endif
223d4670 TS	361	.bdrv_pread = raw_pread,
	362	.bdrv_pwrite = raw_pwrite,
	363	.bdrv_truncate = raw_truncate,
	364	.bdrv_getlength = raw_getlength,
	365	};
	366
	367	/***********************************************/
	368	/* host device */
	369
	370	static int find_cdrom(char *cdrom_name, int cdrom_name_size)
	371	{
	372	char drives[256], *pdrv = drives;
	373	UINT type;
	374
	375	memset(drives, 0, sizeof(drives));
	376	GetLogicalDriveStrings(sizeof(drives), drives);
	377	while(pdrv[0] != '\0') {
	378	type = GetDriveType(pdrv);
	379	switch(type) {
	380	case DRIVE_CDROM:
	381	snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]);
	382	return 0;
	383	break;
	384	}
	385	pdrv += lstrlen(pdrv) + 1;
	386	}
	387	return -1;
	388	}
	389
	390	static int find_device_type(BlockDriverState bs, const char filename)
	391	{
	392	BDRVRawState *s = bs->opaque;
	393	UINT type;
	394	const char *p;
	395
	396	if (strstart(filename, "\\\\.\\", &p) \|\|
	397	strstart(filename, "//./", &p)) {
	398	if (stristart(p, "PhysicalDrive", NULL))
	399	return FTYPE_HARDDISK;
	400	snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]);
	401	type = GetDriveType(s->drive_path);
	402	if (type == DRIVE_CDROM)
	403	return FTYPE_CD;
	404	else
	405	return FTYPE_FILE;
	406	} else {
	407	return FTYPE_FILE;
	408	}
	409	}
	410
	411	static int hdev_open(BlockDriverState bs, const char filename, int flags)
	412	{
	413	BDRVRawState *s = bs->opaque;
	414	int access_flags, create_flags;
	415	DWORD overlapped;
	416	char device_name[64];
	417
	418	if (strstart(filename, "/dev/cdrom", NULL)) {
	419	if (find_cdrom(device_name, sizeof(device_name)) < 0)
	420	return -ENOENT;
	421	filename = device_name;
	422	} else {
	423	/* transform drive letters into device name */
	424	if (((filename[0] >= 'a' && filename[0] <= 'z') \|\|
425	(filename[0] >= 'A' && filename[0] <= 'Z')) &&
426	filename[1] == ':' && filename[2] == '\0') {
427	snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]);
428	filename = device_name;
429	}
430	}
431	s->type = find_device_type(bs, filename);
432
433	if ((flags & BDRV_O_ACCESS) == O_RDWR) {
434	access_flags = GENERIC_READ \| GENERIC_WRITE;
435	} else {
436	access_flags = GENERIC_READ;
437	}
438	create_flags = OPEN_EXISTING;
439
03ff3ca3	440	#ifdef WIN32_AIO
223d4670	441	overlapped = FILE_FLAG_OVERLAPPED;
03ff3ca3 AL	442	#else
03ff3ca3 AL	443	overlapped = FILE_ATTRIBUTE_NORMAL;
223d4670	444	#endif
9f7965c7	445	if ((flags & BDRV_O_NOCACHE))
33f00271	446	overlapped \|= FILE_FLAG_NO_BUFFERING \| FILE_FLAG_WRITE_THROUGH;
9f7965c7 AL	447	else if (!(flags & BDRV_O_CACHE_WB))
9f7965c7 AL	448	overlapped \|= FILE_FLAG_WRITE_THROUGH;
223d4670 TS	449	s->hfile = CreateFile(filename, access_flags,
	450	FILE_SHARE_READ, NULL,
	451	create_flags, overlapped, NULL);
	452	if (s->hfile == INVALID_HANDLE_VALUE) {
	453	int err = GetLastError();
	454
	455	if (err == ERROR_ACCESS_DENIED)
	456	return -EACCES;
	457	return -1;
	458	}
	459	return 0;
	460	}
	461
	462	#if 0
	463	/***********************************************/
	464	/* removable device additional commands */
	465
	466	static int raw_is_inserted(BlockDriverState *bs)
	467	{
	468	return 1;
	469	}
	470
	471	static int raw_media_changed(BlockDriverState *bs)
	472	{
	473	return -ENOTSUP;
	474	}
	475
	476	static int raw_eject(BlockDriverState *bs, int eject_flag)
	477	{
	478	DWORD ret_count;
	479
	480	if (s->type == FTYPE_FILE)
	481	return -ENOTSUP;
	482	if (eject_flag) {
	483	DeviceIoControl(s->hfile, IOCTL_STORAGE_EJECT_MEDIA,
	484	NULL, 0, NULL, 0, &lpBytesReturned, NULL);
	485	} else {
	486	DeviceIoControl(s->hfile, IOCTL_STORAGE_LOAD_MEDIA,
	487	NULL, 0, NULL, 0, &lpBytesReturned, NULL);
	488	}
	489	}
	490
	491	static int raw_set_locked(BlockDriverState *bs, int locked)
	492	{
	493	return -ENOTSUP;
	494	}
	495	#endif
	496
	497	BlockDriver bdrv_host_device = {
	498	"host_device",
	499	sizeof(BDRVRawState),
	500	NULL, /* no probe for protocols */
	501	hdev_open,
	502	NULL,
	503	NULL,
	504	raw_close,
	505	NULL,
	506	raw_flush,
	507
03ff3ca3	508	#ifdef WIN32_AIO
223d4670 TS	509	.bdrv_aio_read = raw_aio_read,
	510	.bdrv_aio_write = raw_aio_write,
	511	.bdrv_aio_cancel = raw_aio_cancel,
	512	.aiocb_size = sizeof(RawAIOCB);
	513	#endif
	514	.bdrv_pread = raw_pread,
	515	.bdrv_pwrite = raw_pwrite,
	516	.bdrv_getlength = raw_getlength,
	517	};