[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/block_int.h"
#include "qemu/module.h"
#include "raw-aio.h"
#include "trace.h"
#include "block/thread-pool.h"
#include "qemu/iov.h"
#include <windows.h>
#include <winioctl.h>

#define FTYPE_FILE 0
#define FTYPE_CD     1
#define FTYPE_HARDDISK 2

static QEMUWin32AIOState *aio;

typedef struct RawWin32AIOData {
    BlockDriverState *bs;
    HANDLE hfile;
    struct iovec *aio_iov;
    int aio_niov;
    size_t aio_nbytes;
    off64_t aio_offset;
    int aio_type;
} RawWin32AIOData;

typedef struct BDRVRawState {
    HANDLE hfile;
    int type;
    char drive_path[16]; /* format: "d:\" */
    QEMUWin32AIOState *aio;
} BDRVRawState;

/*
 * Read/writes the data to/from a given linear buffer.
 *
 * Returns the number of bytes handles or -errno in case of an error. Short
 * reads are only returned if the end of the file is reached.
 */
static size_t handle_aiocb_rw(RawWin32AIOData *aiocb)
{
    size_t offset = 0;
    int i;

    for (i = 0; i < aiocb->aio_niov; i++) {
        OVERLAPPED ov;
        DWORD ret, ret_count, len;

        memset(&ov, 0, sizeof(ov));
        ov.Offset = (aiocb->aio_offset + offset);
        ov.OffsetHigh = (aiocb->aio_offset + offset) >> 32;
        len = aiocb->aio_iov[i].iov_len;
        if (aiocb->aio_type & QEMU_AIO_WRITE) {
            ret = WriteFile(aiocb->hfile, aiocb->aio_iov[i].iov_base,
                            len, &ret_count, &ov);
        } else {
            ret = ReadFile(aiocb->hfile, aiocb->aio_iov[i].iov_base,
                           len, &ret_count, &ov);
        }
        if (!ret) {
            ret_count = 0;
        }
        if (ret_count != len) {
            offset += ret_count;
            break;
        }
        offset += len;
    }

    return offset;
}

static int aio_worker(void *arg)
{
    RawWin32AIOData *aiocb = arg;
    ssize_t ret = 0;
    size_t count;

    switch (aiocb->aio_type & QEMU_AIO_TYPE_MASK) {
    case QEMU_AIO_READ:
        count = handle_aiocb_rw(aiocb);
        if (count < aiocb->aio_nbytes && aiocb->bs->growable) {
            /* A short read means that we have reached EOF. Pad the buffer
             * with zeros for bytes after EOF. */
            iov_memset(aiocb->aio_iov, aiocb->aio_niov, count,
                      0, aiocb->aio_nbytes - count);

            count = aiocb->aio_nbytes;
        }
        if (count == aiocb->aio_nbytes) {
            ret = 0;
        } else {
            ret = -EINVAL;
        }
        break;
    case QEMU_AIO_WRITE:
        count = handle_aiocb_rw(aiocb);
        if (count == aiocb->aio_nbytes) {
            count = 0;
        } else {
            count = -EINVAL;
        }
        break;
    case QEMU_AIO_FLUSH:
        if (!FlushFileBuffers(aiocb->hfile)) {
            return -EIO;
        }
        break;
    default:
        fprintf(stderr, "invalid aio request (0x%x)\n", aiocb->aio_type);
        ret = -EINVAL;
        break;
    }

    g_slice_free(RawWin32AIOData, aiocb);
    return ret;
}

static BlockDriverAIOCB *paio_submit(BlockDriverState *bs, HANDLE hfile,
        int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
        BlockDriverCompletionFunc *cb, void *opaque, int type)
{
    RawWin32AIOData *acb = g_slice_new(RawWin32AIOData);
    ThreadPool *pool;

    acb->bs = bs;
    acb->hfile = hfile;
    acb->aio_type = type;

    if (qiov) {
        acb->aio_iov = qiov->iov;
        acb->aio_niov = qiov->niov;
    }
    acb->aio_nbytes = nb_sectors * 512;
    acb->aio_offset = sector_num * 512;

    trace_paio_submit(acb, opaque, sector_num, nb_sectors, type);
    pool = aio_get_thread_pool(bdrv_get_aio_context(bs));
    return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque);
}

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_probe_alignment(BlockDriverState *bs)
{
    BDRVRawState *s = bs->opaque;
    DWORD sectorsPerCluster, freeClusters, totalClusters, count;
    DISK_GEOMETRY_EX dg;
    BOOL status;

    if (s->type == FTYPE_CD) {
        bs->request_alignment = 2048;
        return;
    }
    if (s->type == FTYPE_HARDDISK) {
        status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
                                 NULL, 0, &dg, sizeof(dg), &count, NULL);
        if (status != 0) {
            bs->request_alignment = dg.Geometry.BytesPerSector;
            return;
        }
        /* try GetDiskFreeSpace too */
    }

    if (s->drive_path[0]) {
        GetDiskFreeSpace(s->drive_path, &sectorsPerCluster,
                         &dg.Geometry.BytesPerSector,
                         &freeClusters, &totalClusters);
        bs->request_alignment = dg.Geometry.BytesPerSector;
    }
}

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_NATIVE_AIO) {
        *overlapped |= FILE_FLAG_OVERLAPPED;
    }
    if (flags & BDRV_O_NOCACHE) {
        *overlapped |= FILE_FLAG_NO_BUFFERING;
    }
}

static QemuOptsList raw_runtime_opts = {
    .name = "raw",
    .head = QTAILQ_HEAD_INITIALIZER(raw_runtime_opts.head),
    .desc = {
        {
            .name = "filename",
            .type = QEMU_OPT_STRING,
            .help = "File name of the image",
        },
        { /* end of list */ }
    },
};

static int raw_open(BlockDriverState *bs, QDict *options, int flags,
                    Error **errp)
{
    BDRVRawState *s = bs->opaque;
    int access_flags;
    DWORD overlapped;
    QemuOpts *opts;
    Error *local_err = NULL;
    const char *filename;
    int ret;

    s->type = FTYPE_FILE;

    opts = qemu_opts_create(&raw_runtime_opts, NULL, 0, &error_abort);
    qemu_opts_absorb_qdict(opts, options, &local_err);
    if (error_is_set(&local_err)) {
        error_propagate(errp, local_err);
        ret = -EINVAL;
        goto fail;
    }

    filename = qemu_opt_get(opts, "filename");

    raw_parse_flags(flags, &access_flags, &overlapped);

    if ((flags & BDRV_O_NATIVE_AIO) && aio == NULL) {
        aio = win32_aio_init();
        if (aio == NULL) {
            error_setg(errp, "Could not initialize AIO");
            ret = -EINVAL;
            goto fail;
        }
    }

    if (filename[0] && filename[1] == ':') {
        snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", filename[0]);
    } else if (filename[0] == '\\' && filename[1] == '\\') {
        s->drive_path[0] = 0;
    } else {
        /* Relative path.  */
        char buf[MAX_PATH];
        GetCurrentDirectory(MAX_PATH, buf);
        snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", buf[0]);
    }

    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) {
            ret = -EACCES;
        } else {
            ret = -EINVAL;
        }
        goto fail;
    }

    if (flags & BDRV_O_NATIVE_AIO) {
        ret = win32_aio_attach(aio, s->hfile);
        if (ret < 0) {
            CloseHandle(s->hfile);
            error_setg_errno(errp, -ret, "Could not enable AIO");
            goto fail;
        }
        s->aio = aio;
    }

    raw_probe_alignment(bs);
    ret = 0;
fail:
    qemu_opts_del(opts);
    return ret;
}

static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
                         int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
                         BlockDriverCompletionFunc *cb, void *opaque)
{
    BDRVRawState *s = bs->opaque;
    if (s->aio) {
        return win32_aio_submit(bs, s->aio, s->hfile, sector_num, qiov,
                                nb_sectors, cb, opaque, QEMU_AIO_READ); 
    } else {
        return paio_submit(bs, s->hfile, sector_num, qiov, nb_sectors,
                           cb, opaque, QEMU_AIO_READ);
    }
}

static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
                          int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
                          BlockDriverCompletionFunc *cb, void *opaque)
{
    BDRVRawState *s = bs->opaque;
    if (s->aio) {
        return win32_aio_submit(bs, s->aio, s->hfile, sector_num, qiov,
                                nb_sectors, cb, opaque, QEMU_AIO_WRITE); 
    } else {
        return paio_submit(bs, s->hfile, sector_num, qiov, nb_sectors,
                           cb, opaque, QEMU_AIO_WRITE);
    }
}

static BlockDriverAIOCB *raw_aio_flush(BlockDriverState *bs,
                         BlockDriverCompletionFunc *cb, void *opaque)
{
    BDRVRawState *s = bs->opaque;
    return paio_submit(bs, s->hfile, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH);
}

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;
    DWORD dwPtrLow;

    low = offset;
    high = offset >> 32;

    /*
     * An error has occurred if the return value is INVALID_SET_FILE_POINTER
     * and GetLastError doesn't return NO_ERROR.
     */
    dwPtrLow = SetFilePointer(s->hfile, low, &high, FILE_BEGIN);
    if (dwPtrLow == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) {
        fprintf(stderr, "SetFilePointer error: %lu\n", GetLastError());
        return -EIO;
    }
    if (SetEndOfFile(s->hfile) == 0) {
        fprintf(stderr, "SetEndOfFile error: %lu\n", GetLastError());
        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,
                      Error **errp)
{
    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) {
        error_setg_errno(errp, errno, "Could not create file");
        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_needs_filename = true,
    .bdrv_file_open	= raw_open,
    .bdrv_close		= raw_close,
    .bdrv_create	= raw_create,
    .bdrv_has_zero_init = bdrv_has_zero_init_1,

    .bdrv_aio_readv     = raw_aio_readv,
    .bdrv_aio_writev    = raw_aio_writev,
    .bdrv_aio_flush     = raw_aio_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, QDict *options, int flags,
                     Error **errp)
{
    BDRVRawState *s = bs->opaque;
    int access_flags, create_flags;
    int ret = 0;
    DWORD overlapped;
    char device_name[64];

    Error *local_err = NULL;
    const char *filename;

    QemuOpts *opts = qemu_opts_create(&raw_runtime_opts, NULL, 0,
                                      &error_abort);
    qemu_opts_absorb_qdict(opts, options, &local_err);
    if (error_is_set(&local_err)) {
        error_propagate(errp, local_err);
        ret = -EINVAL;
        goto done;
    }

    filename = qemu_opt_get(opts, "filename");

    if (strstart(filename, "/dev/cdrom", NULL)) {
        if (find_cdrom(device_name, sizeof(device_name)) < 0) {
            error_setg(errp, "Could not open CD-ROM drive");
            ret = -ENOENT;
            goto done;
        }
        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) {
            ret = -EACCES;
        } else {
            ret = -EINVAL;
        }
        error_setg_errno(errp, -ret, "Could not open device");
        goto done;
    }

done:
    qemu_opts_del(opts);
    return ret;
}

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

    .bdrv_aio_readv     = raw_aio_readv,
    .bdrv_aio_writev    = raw_aio_writev,
    .bdrv_aio_flush     = raw_aio_flush,

    .bdrv_getlength      = raw_getlength,
    .has_variable_length = true,

    .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"
1de7afc9	25	#include "qemu/timer.h"
737e150e	26	#include "block/block_int.h"
1de7afc9	27	#include "qemu/module.h"
fc4edb84 PB	28	#include "raw-aio.h"
fc4edb84 PB	29	#include "trace.h"
737e150e	30	#include "block/thread-pool.h"
1de7afc9	31	#include "qemu/iov.h"
49dc768d	32	#include <windows.h>
223d4670 TS	33	#include <winioctl.h>
	34
	35	#define FTYPE_FILE 0
	36	#define FTYPE_CD 1
	37	#define FTYPE_HARDDISK 2
	38
a2736526 PB	39	static QEMUWin32AIOState *aio;
a2736526 PB	40
fc4edb84 PB	41	typedef struct RawWin32AIOData {
	42	BlockDriverState *bs;
	43	HANDLE hfile;
	44	struct iovec *aio_iov;
	45	int aio_niov;
	46	size_t aio_nbytes;
	47	off64_t aio_offset;
	48	int aio_type;
	49	} RawWin32AIOData;
	50
223d4670 TS	51	typedef struct BDRVRawState {
	52	HANDLE hfile;
	53	int type;
	54	char drive_path[16]; /* format: "d:\" */
a2736526	55	QEMUWin32AIOState *aio;
223d4670 TS	56	} BDRVRawState;
223d4670 TS	57
fc4edb84 PB	58	/*
	59	* Read/writes the data to/from a given linear buffer.
	60	*
	61	* Returns the number of bytes handles or -errno in case of an error. Short
	62	* reads are only returned if the end of the file is reached.
	63	*/
	64	static size_t handle_aiocb_rw(RawWin32AIOData *aiocb)
	65	{
	66	size_t offset = 0;
	67	int i;
	68
	69	for (i = 0; i < aiocb->aio_niov; i++) {
	70	OVERLAPPED ov;
	71	DWORD ret, ret_count, len;
	72
	73	memset(&ov, 0, sizeof(ov));
	74	ov.Offset = (aiocb->aio_offset + offset);
	75	ov.OffsetHigh = (aiocb->aio_offset + offset) >> 32;
	76	len = aiocb->aio_iov[i].iov_len;
	77	if (aiocb->aio_type & QEMU_AIO_WRITE) {
	78	ret = WriteFile(aiocb->hfile, aiocb->aio_iov[i].iov_base,
	79	len, &ret_count, &ov);
	80	} else {
	81	ret = ReadFile(aiocb->hfile, aiocb->aio_iov[i].iov_base,
	82	len, &ret_count, &ov);
	83	}
	84	if (!ret) {
	85	ret_count = 0;
	86	}
	87	if (ret_count != len) {
56e023af	88	offset += ret_count;
fc4edb84 PB	89	break;
	90	}
	91	offset += len;
	92	}
	93
	94	return offset;
	95	}
	96
	97	static int aio_worker(void *arg)
	98	{
	99	RawWin32AIOData *aiocb = arg;
	100	ssize_t ret = 0;
	101	size_t count;
	102
	103	switch (aiocb->aio_type & QEMU_AIO_TYPE_MASK) {
	104	case QEMU_AIO_READ:
	105	count = handle_aiocb_rw(aiocb);
	106	if (count < aiocb->aio_nbytes && aiocb->bs->growable) {
	107	/* A short read means that we have reached EOF. Pad the buffer
	108	* with zeros for bytes after EOF. */
	109	iov_memset(aiocb->aio_iov, aiocb->aio_niov, count,
	110	0, aiocb->aio_nbytes - count);
	111
	112	count = aiocb->aio_nbytes;
	113	}
	114	if (count == aiocb->aio_nbytes) {
	115	ret = 0;
	116	} else {
	117	ret = -EINVAL;
	118	}
	119	break;
	120	case QEMU_AIO_WRITE:
	121	count = handle_aiocb_rw(aiocb);
	122	if (count == aiocb->aio_nbytes) {
	123	count = 0;
	124	} else {
	125	count = -EINVAL;
	126	}
	127	break;
	128	case QEMU_AIO_FLUSH:
	129	if (!FlushFileBuffers(aiocb->hfile)) {
	130	return -EIO;
	131	}
	132	break;
	133	default:
	134	fprintf(stderr, "invalid aio request (0x%x)\n", aiocb->aio_type);
	135	ret = -EINVAL;
	136	break;
	137	}
	138
	139	g_slice_free(RawWin32AIOData, aiocb);
	140	return ret;
	141	}
	142
	143	static BlockDriverAIOCB paio_submit(BlockDriverState bs, HANDLE hfile,
	144	int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
	145	BlockDriverCompletionFunc cb, void opaque, int type)
	146	{
	147	RawWin32AIOData *acb = g_slice_new(RawWin32AIOData);
c4d9d196	148	ThreadPool *pool;
fc4edb84 PB	149
	150	acb->bs = bs;
	151	acb->hfile = hfile;
	152	acb->aio_type = type;
	153
	154	if (qiov) {
	155	acb->aio_iov = qiov->iov;
	156	acb->aio_niov = qiov->niov;
	157	}
	158	acb->aio_nbytes = nb_sectors * 512;
	159	acb->aio_offset = sector_num * 512;
	160
	161	trace_paio_submit(acb, opaque, sector_num, nb_sectors, type);
c4d9d196 SH	162	pool = aio_get_thread_pool(bdrv_get_aio_context(bs));
c4d9d196 SH	163	return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque);
fc4edb84 PB	164	}
fc4edb84 PB	165
223d4670 TS	166	int qemu_ftruncate64(int fd, int64_t length)
	167	{
	168	LARGE_INTEGER li;
2c993ec2	169	DWORD dw;
223d4670 TS	170	LONG high;
	171	HANDLE h;
	172	BOOL res;
	173
	174	if ((GetVersion() & 0x80000000UL) && (length >> 32) != 0)
	175	return -1;
	176
	177	h = (HANDLE)_get_osfhandle(fd);
	178
	179	/* get current position, ftruncate do not change position */
	180	li.HighPart = 0;
	181	li.LowPart = SetFilePointer (h, 0, &li.HighPart, FILE_CURRENT);
2c993ec2	182	if (li.LowPart == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) {
223d4670	183	return -1;
2c993ec2	184	}
223d4670 TS	185
223d4670 TS	186	high = length >> 32;
2c993ec2 SW	187	dw = SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN);
2c993ec2 SW	188	if (dw == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) {
223d4670	189	return -1;
2c993ec2	190	}
223d4670 TS	191	res = SetEndOfFile(h);
	192
	193	/* back to old position */
	194	SetFilePointer(h, li.LowPart, &li.HighPart, FILE_BEGIN);
	195	return res ? 0 : -1;
	196	}
	197
	198	static int set_sparse(int fd)
	199	{
	200	DWORD returned;
	201	return (int) DeviceIoControl((HANDLE)_get_osfhandle(fd), FSCTL_SET_SPARSE,
	202	NULL, 0, NULL, 0, &returned, NULL);
	203	}
	204
c25f53b0 PB	205	static void raw_probe_alignment(BlockDriverState *bs)
	206	{
	207	BDRVRawState *s = bs->opaque;
	208	DWORD sectorsPerCluster, freeClusters, totalClusters, count;
	209	DISK_GEOMETRY_EX dg;
	210	BOOL status;
	211
	212	if (s->type == FTYPE_CD) {
	213	bs->request_alignment = 2048;
	214	return;
	215	}
	216	if (s->type == FTYPE_HARDDISK) {
	217	status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
	218	NULL, 0, &dg, sizeof(dg), &count, NULL);
	219	if (status != 0) {
	220	bs->request_alignment = dg.Geometry.BytesPerSector;
	221	return;
	222	}
	223	/* try GetDiskFreeSpace too */
	224	}
	225
	226	if (s->drive_path[0]) {
	227	GetDiskFreeSpace(s->drive_path, &sectorsPerCluster,
	228	&dg.Geometry.BytesPerSector,
	229	&freeClusters, &totalClusters);
	230	bs->request_alignment = dg.Geometry.BytesPerSector;
	231	}
	232	}
	233
6a8dc042 JC	234	static void raw_parse_flags(int flags, int access_flags, DWORD overlapped)
	235	{
	236	assert(access_flags != NULL);
	237	assert(overlapped != NULL);
	238
	239	if (flags & BDRV_O_RDWR) {
	240	*access_flags = GENERIC_READ \| GENERIC_WRITE;
	241	} else {
	242	*access_flags = GENERIC_READ;
	243	}
	244
	245	*overlapped = FILE_ATTRIBUTE_NORMAL;
a2736526 PB	246	if (flags & BDRV_O_NATIVE_AIO) {
	247	*overlapped \|= FILE_FLAG_OVERLAPPED;
	248	}
6a8dc042 JC	249	if (flags & BDRV_O_NOCACHE) {
	250	*overlapped \|= FILE_FLAG_NO_BUFFERING;
	251	}
6a8dc042 JC	252	}
6a8dc042 JC	253
8a79380b KW	254	static QemuOptsList raw_runtime_opts = {
	255	.name = "raw",
	256	.head = QTAILQ_HEAD_INITIALIZER(raw_runtime_opts.head),
	257	.desc = {
	258	{
	259	.name = "filename",
	260	.type = QEMU_OPT_STRING,
	261	.help = "File name of the image",
	262	},
	263	{ /* end of list */ }
	264	},
	265	};
	266
015a1036 HR	267	static int raw_open(BlockDriverState bs, QDict options, int flags,
015a1036 HR	268	Error **errp)
223d4670 TS	269	{
223d4670 TS	270	BDRVRawState *s = bs->opaque;
9a2d77ad	271	int access_flags;
223d4670	272	DWORD overlapped;
8a79380b KW	273	QemuOpts *opts;
	274	Error *local_err = NULL;
	275	const char *filename;
	276	int ret;
223d4670 TS	277
	278	s->type = FTYPE_FILE;
	279
87ea75d5	280	opts = qemu_opts_create(&raw_runtime_opts, NULL, 0, &error_abort);
8a79380b KW	281	qemu_opts_absorb_qdict(opts, options, &local_err);
8a79380b KW	282	if (error_is_set(&local_err)) {
c6252b7c	283	error_propagate(errp, local_err);
8a79380b KW	284	ret = -EINVAL;
	285	goto fail;
	286	}
	287
	288	filename = qemu_opt_get(opts, "filename");
	289
6a8dc042	290	raw_parse_flags(flags, &access_flags, &overlapped);
8a79380b	291
a2736526 PB	292	if ((flags & BDRV_O_NATIVE_AIO) && aio == NULL) {
	293	aio = win32_aio_init();
	294	if (aio == NULL) {
c6252b7c	295	error_setg(errp, "Could not initialize AIO");
8a79380b KW	296	ret = -EINVAL;
8a79380b KW	297	goto fail;
a2736526 PB	298	}
a2736526 PB	299	}
9a2d77ad	300
c25f53b0 PB	301	if (filename[0] && filename[1] == ':') {
	302	snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", filename[0]);
	303	} else if (filename[0] == '\\' && filename[1] == '\\') {
	304	s->drive_path[0] = 0;
	305	} else {
	306	/* Relative path. */
	307	char buf[MAX_PATH];
	308	GetCurrentDirectory(MAX_PATH, buf);
	309	snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", buf[0]);
	310	}
	311
223d4670 TS	312	s->hfile = CreateFile(filename, access_flags,
223d4670 TS	313	FILE_SHARE_READ, NULL,
9a2d77ad	314	OPEN_EXISTING, overlapped, NULL);
223d4670 TS	315	if (s->hfile == INVALID_HANDLE_VALUE) {
	316	int err = GetLastError();
	317
8a79380b KW	318	if (err == ERROR_ACCESS_DENIED) {
	319	ret = -EACCES;
	320	} else {
	321	ret = -EINVAL;
	322	}
	323	goto fail;
a2736526 PB	324	}
	325
	326	if (flags & BDRV_O_NATIVE_AIO) {
8a79380b	327	ret = win32_aio_attach(aio, s->hfile);
a2736526 PB	328	if (ret < 0) {
a2736526 PB	329	CloseHandle(s->hfile);
c6252b7c	330	error_setg_errno(errp, -ret, "Could not enable AIO");
8a79380b	331	goto fail;
a2736526 PB	332	}
a2736526 PB	333	s->aio = aio;
223d4670	334	}
8a79380b	335
c25f53b0	336	raw_probe_alignment(bs);
8a79380b KW	337	ret = 0;
	338	fail:
	339	qemu_opts_del(opts);
	340	return ret;
223d4670 TS	341	}
223d4670 TS	342
fc4edb84 PB	343	static BlockDriverAIOCB raw_aio_readv(BlockDriverState bs,
	344	int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
	345	BlockDriverCompletionFunc cb, void opaque)
223d4670 TS	346	{
223d4670 TS	347	BDRVRawState *s = bs->opaque;
a2736526 PB	348	if (s->aio) {
	349	return win32_aio_submit(bs, s->aio, s->hfile, sector_num, qiov,
	350	nb_sectors, cb, opaque, QEMU_AIO_READ);
	351	} else {
	352	return paio_submit(bs, s->hfile, sector_num, qiov, nb_sectors,
	353	cb, opaque, QEMU_AIO_READ);
	354	}
223d4670 TS	355	}
223d4670 TS	356
fc4edb84 PB	357	static BlockDriverAIOCB raw_aio_writev(BlockDriverState bs,
	358	int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
	359	BlockDriverCompletionFunc cb, void opaque)
223d4670 TS	360	{
223d4670 TS	361	BDRVRawState *s = bs->opaque;
a2736526 PB	362	if (s->aio) {
	363	return win32_aio_submit(bs, s->aio, s->hfile, sector_num, qiov,
	364	nb_sectors, cb, opaque, QEMU_AIO_WRITE);
	365	} else {
	366	return paio_submit(bs, s->hfile, sector_num, qiov, nb_sectors,
	367	cb, opaque, QEMU_AIO_WRITE);
	368	}
223d4670 TS	369	}
223d4670 TS	370
fc4edb84 PB	371	static BlockDriverAIOCB raw_aio_flush(BlockDriverState bs,
fc4edb84 PB	372	BlockDriverCompletionFunc cb, void opaque)
223d4670 TS	373	{
223d4670 TS	374	BDRVRawState *s = bs->opaque;
fc4edb84	375	return paio_submit(bs, s->hfile, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH);
223d4670 TS	376	}
	377
	378	static void raw_close(BlockDriverState *bs)
	379	{
	380	BDRVRawState *s = bs->opaque;
	381	CloseHandle(s->hfile);
	382	}
	383
	384	static int raw_truncate(BlockDriverState *bs, int64_t offset)
	385	{
	386	BDRVRawState *s = bs->opaque;
b9e82a59	387	LONG low, high;
fbcad04d	388	DWORD dwPtrLow;
223d4670 TS	389
	390	low = offset;
	391	high = offset >> 32;
fbcad04d FC	392
	393	/*
	394	* An error has occurred if the return value is INVALID_SET_FILE_POINTER
	395	* and GetLastError doesn't return NO_ERROR.
	396	*/
	397	dwPtrLow = SetFilePointer(s->hfile, low, &high, FILE_BEGIN);
	398	if (dwPtrLow == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) {
fccedc62	399	fprintf(stderr, "SetFilePointer error: %lu\n", GetLastError());
fbcad04d FC	400	return -EIO;
	401	}
	402	if (SetEndOfFile(s->hfile) == 0) {
fccedc62	403	fprintf(stderr, "SetEndOfFile error: %lu\n", GetLastError());
223d4670	404	return -EIO;
fbcad04d	405	}
223d4670 TS	406	return 0;
	407	}
	408
	409	static int64_t raw_getlength(BlockDriverState *bs)
	410	{
	411	BDRVRawState *s = bs->opaque;
	412	LARGE_INTEGER l;
	413	ULARGE_INTEGER available, total, total_free;
	414	DISK_GEOMETRY_EX dg;
	415	DWORD count;
	416	BOOL status;
	417
	418	switch(s->type) {
	419	case FTYPE_FILE:
b9e82a59	420	l.LowPart = GetFileSize(s->hfile, (PDWORD)&l.HighPart);
223d4670 TS	421	if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
	422	return -EIO;
	423	break;
	424	case FTYPE_CD:
	425	if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free))
	426	return -EIO;
	427	l.QuadPart = total.QuadPart;
	428	break;
	429	case FTYPE_HARDDISK:
	430	status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
	431	NULL, 0, &dg, sizeof(dg), &count, NULL);
	432	if (status != 0) {
	433	l = dg.DiskSize;
	434	}
	435	break;
	436	default:
	437	return -EIO;
	438	}
	439	return l.QuadPart;
	440	}
	441
4a1d5e1f FZ	442	static int64_t raw_get_allocated_file_size(BlockDriverState *bs)
	443	{
	444	typedef DWORD (WINAPI * get_compressed_t)(const char *filename,
	445	DWORD * high);
	446	get_compressed_t get_compressed;
	447	struct _stati64 st;
	448	const char *filename = bs->filename;
	449	/* WinNT support GetCompressedFileSize to determine allocate size */
	450	get_compressed =
	451	(get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"),
	452	"GetCompressedFileSizeA");
	453	if (get_compressed) {
	454	DWORD high, low;
	455	low = get_compressed(filename, &high);
	456	if (low != 0xFFFFFFFFlu \|\| GetLastError() == NO_ERROR) {
	457	return (((int64_t) high) << 32) + low;
	458	}
	459	}
	460
	461	if (_stati64(filename, &st) < 0) {
	462	return -1;
	463	}
	464	return st.st_size;
	465	}
	466
d5124c00 HR	467	static int raw_create(const char filename, QEMUOptionParameter options,
d5124c00 HR	468	Error **errp)
223d4670 TS	469	{
223d4670 TS	470	int fd;
0e7e1989	471	int64_t total_size = 0;
223d4670	472
0e7e1989 KW	473	/* Read out options */
	474	while (options && options->name) {
	475	if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
	476	total_size = options->value.n / 512;
	477	}
	478	options++;
	479	}
223d4670	480
6165f4d8 CB	481	fd = qemu_open(filename, O_WRONLY \| O_CREAT \| O_TRUNC \| O_BINARY,
6165f4d8 CB	482	0644);
c6252b7c HR	483	if (fd < 0) {
c6252b7c HR	484	error_setg_errno(errp, errno, "Could not create file");
223d4670	485	return -EIO;
c6252b7c	486	}
223d4670 TS	487	set_sparse(fd);
223d4670 TS	488	ftruncate(fd, total_size * 512);
2e1e79da	489	qemu_close(fd);
223d4670 TS	490	return 0;
	491	}
	492
0e7e1989	493	static QEMUOptionParameter raw_create_options[] = {
db08adf5 KW	494	{
	495	.name = BLOCK_OPT_SIZE,
	496	.type = OPT_SIZE,
	497	.help = "Virtual disk size"
	498	},
0e7e1989 KW	499	{ NULL }
	500	};
	501
84a12e66 CH	502	static BlockDriver bdrv_file = {
	503	.format_name = "file",
	504	.protocol_name = "file",
f1b2f712	505	.instance_size = sizeof(BDRVRawState),
030be321	506	.bdrv_needs_filename = true,
66f82cee	507	.bdrv_file_open = raw_open,
f1b2f712 AL	508	.bdrv_close = raw_close,
f1b2f712 AL	509	.bdrv_create = raw_create,
3ac21627	510	.bdrv_has_zero_init = bdrv_has_zero_init_1,
c68b89ac	511
fc4edb84 PB	512	.bdrv_aio_readv = raw_aio_readv,
	513	.bdrv_aio_writev = raw_aio_writev,
	514	.bdrv_aio_flush = raw_aio_flush,
c68b89ac	515
f1b2f712 AL	516	.bdrv_truncate = raw_truncate,
f1b2f712 AL	517	.bdrv_getlength = raw_getlength,
4a1d5e1f FZ	518	.bdrv_get_allocated_file_size
4a1d5e1f FZ	519	= raw_get_allocated_file_size,
0e7e1989 KW	520
0e7e1989 KW	521	.create_options = raw_create_options,
223d4670 TS	522	};
	523
	524	/***********************************************/
	525	/* host device */
	526
	527	static int find_cdrom(char *cdrom_name, int cdrom_name_size)
	528	{
	529	char drives[256], *pdrv = drives;
	530	UINT type;
	531
	532	memset(drives, 0, sizeof(drives));
	533	GetLogicalDriveStrings(sizeof(drives), drives);
	534	while(pdrv[0] != '\0') {
	535	type = GetDriveType(pdrv);
	536	switch(type) {
	537	case DRIVE_CDROM:
	538	snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]);
	539	return 0;
	540	break;
	541	}
	542	pdrv += lstrlen(pdrv) + 1;
	543	}
	544	return -1;
	545	}
	546
	547	static int find_device_type(BlockDriverState bs, const char filename)
	548	{
	549	BDRVRawState *s = bs->opaque;
	550	UINT type;
	551	const char *p;
	552
	553	if (strstart(filename, "\\\\.\\", &p) \|\|
	554	strstart(filename, "//./", &p)) {
	555	if (stristart(p, "PhysicalDrive", NULL))
	556	return FTYPE_HARDDISK;
	557	snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]);
	558	type = GetDriveType(s->drive_path);
3060cd14 AL	559	switch (type) {
	560	case DRIVE_REMOVABLE:
	561	case DRIVE_FIXED:
	562	return FTYPE_HARDDISK;
	563	case DRIVE_CDROM:
223d4670	564	return FTYPE_CD;
3060cd14	565	default:
223d4670	566	return FTYPE_FILE;
3060cd14	567	}
223d4670 TS	568	} else {
	569	return FTYPE_FILE;
	570	}
	571	}
	572
508c7cb3 CH	573	static int hdev_probe_device(const char *filename)
	574	{
	575	if (strstart(filename, "/dev/cdrom", NULL))
	576	return 100;
	577	if (is_windows_drive(filename))
	578	return 100;
	579	return 0;
	580	}
	581
015a1036 HR	582	static int hdev_open(BlockDriverState bs, QDict options, int flags,
015a1036 HR	583	Error **errp)
223d4670 TS	584	{
	585	BDRVRawState *s = bs->opaque;
	586	int access_flags, create_flags;
68dc0364	587	int ret = 0;
223d4670 TS	588	DWORD overlapped;
223d4670 TS	589	char device_name[64];
68dc0364 SW	590
	591	Error *local_err = NULL;
	592	const char *filename;
	593
87ea75d5 PC	594	QemuOpts *opts = qemu_opts_create(&raw_runtime_opts, NULL, 0,
87ea75d5 PC	595	&error_abort);
68dc0364 SW	596	qemu_opts_absorb_qdict(opts, options, &local_err);
68dc0364 SW	597	if (error_is_set(&local_err)) {
c6252b7c	598	error_propagate(errp, local_err);
68dc0364 SW	599	ret = -EINVAL;
	600	goto done;
	601	}
	602
	603	filename = qemu_opt_get(opts, "filename");
223d4670 TS	604
223d4670 TS	605	if (strstart(filename, "/dev/cdrom", NULL)) {
68dc0364	606	if (find_cdrom(device_name, sizeof(device_name)) < 0) {
c6252b7c	607	error_setg(errp, "Could not open CD-ROM drive");
68dc0364 SW	608	ret = -ENOENT;
	609	goto done;
	610	}
223d4670 TS	611	filename = device_name;
	612	} else {
	613	/* transform drive letters into device name */
	614	if (((filename[0] >= 'a' && filename[0] <= 'z') \|\|
	615	(filename[0] >= 'A' && filename[0] <= 'Z')) &&
	616	filename[1] == ':' && filename[2] == '\0') {
	617	snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]);
	618	filename = device_name;
	619	}
	620	}
	621	s->type = find_device_type(bs, filename);
	622
6a8dc042 JC	623	raw_parse_flags(flags, &access_flags, &overlapped);
6a8dc042 JC	624
223d4670 TS	625	create_flags = OPEN_EXISTING;
223d4670 TS	626
223d4670 TS	627	s->hfile = CreateFile(filename, access_flags,
	628	FILE_SHARE_READ, NULL,
	629	create_flags, overlapped, NULL);
	630	if (s->hfile == INVALID_HANDLE_VALUE) {
	631	int err = GetLastError();
	632
68dc0364 SW	633	if (err == ERROR_ACCESS_DENIED) {
	634	ret = -EACCES;
	635	} else {
45d57f6e	636	ret = -EINVAL;
68dc0364	637	}
45d57f6e	638	error_setg_errno(errp, -ret, "Could not open device");
68dc0364	639	goto done;
223d4670	640	}
68dc0364 SW	641
	642	done:
	643	qemu_opts_del(opts);
	644	return ret;
223d4670 TS	645	}
223d4670 TS	646
5efa9d5a	647	static BlockDriver bdrv_host_device = {
e60f469c	648	.format_name = "host_device",
84a12e66	649	.protocol_name = "host_device",
e60f469c	650	.instance_size = sizeof(BDRVRawState),
030be321	651	.bdrv_needs_filename = true,
508c7cb3	652	.bdrv_probe_device = hdev_probe_device,
66f82cee	653	.bdrv_file_open = hdev_open,
e60f469c	654	.bdrv_close = raw_close,
223d4670	655
fc4edb84 PB	656	.bdrv_aio_readv = raw_aio_readv,
	657	.bdrv_aio_writev = raw_aio_writev,
	658	.bdrv_aio_flush = raw_aio_flush,
c68b89ac	659
b94a2610 KW	660	.bdrv_getlength = raw_getlength,
	661	.has_variable_length = true,
	662
4a1d5e1f FZ	663	.bdrv_get_allocated_file_size
4a1d5e1f FZ	664	= raw_get_allocated_file_size,
223d4670	665	};
5efa9d5a	666
84a12e66	667	static void bdrv_file_init(void)
5efa9d5a	668	{
84a12e66	669	bdrv_register(&bdrv_file);
5efa9d5a AL	670	bdrv_register(&bdrv_host_device);
	671	}
	672
84a12e66	673	block_init(bdrv_file_init);