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

    s->type = FTYPE_FILE;

    raw_parse_flags(flags, &access_flags, &overlapped);
    
    if ((flags & BDRV_O_NATIVE_AIO) && aio == NULL) {
        aio = win32_aio_init();
        if (aio == NULL) {
            return -EINVAL;
        }
    }

    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 -EINVAL;
    }

    if (flags & BDRV_O_NATIVE_AIO) {
        int ret = win32_aio_attach(aio, s->hfile);
        if (ret < 0) {
            CloseHandle(s->hfile);
            return ret;
        }
        s->aio = aio;
    }
    return 0;
}

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)
{
    int fd;
    int64_t total_size = 0;

    /* Read out options */
    while (options && options->name) {
        if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
            total_size = options->value.n / 512;
        }
        options++;
    }

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

static QEMUOptionParameter raw_create_options[] = {
    {
        .name = BLOCK_OPT_SIZE,
        .type = OPT_SIZE,
        .help = "Virtual disk size"
    },
    { NULL }
};

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

    .bdrv_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, const char *filename,
                     QDict *options, int flags)
{
    BDRVRawState *s = bs->opaque;
    int access_flags, create_flags;
    DWORD overlapped;
    char device_name[64];

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

    raw_parse_flags(flags, &access_flags, &overlapped);

    create_flags = OPEN_EXISTING;

    s->hfile = CreateFile(filename, access_flags,
                          FILE_SHARE_READ, NULL,
                          create_flags, overlapped, NULL);
    if (s->hfile == INVALID_HANDLE_VALUE) {
        int err = GetLastError();

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

static int hdev_has_zero_init(BlockDriverState *bs)
{
    return 0;
}

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

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

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

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

block_init(bdrv_file_init);
Commit	Line	Data
223d4670 TS	1	/*
	2	* Block driver for RAW files (win32)
	3	*
	4	* Copyright (c) 2006 Fabrice Bellard
	5	*
	6	* Permission is hereby granted, free of charge, to any person obtaining a copy
	7	* of this software and associated documentation files (the "Software"), to deal
	8	* in the Software without restriction, including without limitation the rights
	9	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	10	* copies of the Software, and to permit persons to whom the Software is
	11	* furnished to do so, subject to the following conditions:
	12	*
	13	* The above copyright notice and this permission notice shall be included in
	14	* all copies or substantial portions of the Software.
	15	*
	16	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	17	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	19	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	20	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	21	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	22	* THE SOFTWARE.
	23	*/
	24	#include "qemu-common.h"
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) {
	88	break;
	89	}
	90	offset += len;
	91	}
	92
	93	return offset;
	94	}
	95
	96	static int aio_worker(void *arg)
	97	{
	98	RawWin32AIOData *aiocb = arg;
	99	ssize_t ret = 0;
	100	size_t count;
	101
	102	switch (aiocb->aio_type & QEMU_AIO_TYPE_MASK) {
	103	case QEMU_AIO_READ:
	104	count = handle_aiocb_rw(aiocb);
	105	if (count < aiocb->aio_nbytes && aiocb->bs->growable) {
	106	/* A short read means that we have reached EOF. Pad the buffer
	107	* with zeros for bytes after EOF. */
	108	iov_memset(aiocb->aio_iov, aiocb->aio_niov, count,
	109	0, aiocb->aio_nbytes - count);
	110
	111	count = aiocb->aio_nbytes;
	112	}
	113	if (count == aiocb->aio_nbytes) {
	114	ret = 0;
	115	} else {
	116	ret = -EINVAL;
	117	}
	118	break;
	119	case QEMU_AIO_WRITE:
	120	count = handle_aiocb_rw(aiocb);
	121	if (count == aiocb->aio_nbytes) {
122	count = 0;
123	} else {
124	count = -EINVAL;
125	}
126	break;
127	case QEMU_AIO_FLUSH:
128	if (!FlushFileBuffers(aiocb->hfile)) {
129	return -EIO;
130	}
131	break;
132	default:
133	fprintf(stderr, "invalid aio request (0x%x)\n", aiocb->aio_type);
134	ret = -EINVAL;
135	break;
136	}
137
138	g_slice_free(RawWin32AIOData, aiocb);
139	return ret;
140	}
141
142	static BlockDriverAIOCB paio_submit(BlockDriverState bs, HANDLE hfile,
143	int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
144	BlockDriverCompletionFunc cb, void opaque, int type)
145	{
146	RawWin32AIOData *acb = g_slice_new(RawWin32AIOData);
c4d9d196	147	ThreadPool *pool;
fc4edb84 PB	148
	149	acb->bs = bs;
	150	acb->hfile = hfile;
	151	acb->aio_type = type;
	152
	153	if (qiov) {
	154	acb->aio_iov = qiov->iov;
	155	acb->aio_niov = qiov->niov;
	156	}
	157	acb->aio_nbytes = nb_sectors * 512;
	158	acb->aio_offset = sector_num * 512;
	159
	160	trace_paio_submit(acb, opaque, sector_num, nb_sectors, type);
c4d9d196 SH	161	pool = aio_get_thread_pool(bdrv_get_aio_context(bs));
c4d9d196 SH	162	return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque);
fc4edb84 PB	163	}
fc4edb84 PB	164
223d4670 TS	165	int qemu_ftruncate64(int fd, int64_t length)
	166	{
	167	LARGE_INTEGER li;
2c993ec2	168	DWORD dw;
223d4670 TS	169	LONG high;
	170	HANDLE h;
	171	BOOL res;
	172
	173	if ((GetVersion() & 0x80000000UL) && (length >> 32) != 0)
	174	return -1;
	175
	176	h = (HANDLE)_get_osfhandle(fd);
	177
	178	/* get current position, ftruncate do not change position */
	179	li.HighPart = 0;
	180	li.LowPart = SetFilePointer (h, 0, &li.HighPart, FILE_CURRENT);
2c993ec2	181	if (li.LowPart == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) {
223d4670	182	return -1;
2c993ec2	183	}
223d4670 TS	184
223d4670 TS	185	high = length >> 32;
2c993ec2 SW	186	dw = SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN);
2c993ec2 SW	187	if (dw == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) {
223d4670	188	return -1;
2c993ec2	189	}
223d4670 TS	190	res = SetEndOfFile(h);
	191
	192	/* back to old position */
	193	SetFilePointer(h, li.LowPart, &li.HighPart, FILE_BEGIN);
	194	return res ? 0 : -1;
	195	}
	196
	197	static int set_sparse(int fd)
	198	{
	199	DWORD returned;
	200	return (int) DeviceIoControl((HANDLE)_get_osfhandle(fd), FSCTL_SET_SPARSE,
	201	NULL, 0, NULL, 0, &returned, NULL);
	202	}
	203
6a8dc042 JC	204	static void raw_parse_flags(int flags, int access_flags, DWORD overlapped)
	205	{
	206	assert(access_flags != NULL);
	207	assert(overlapped != NULL);
	208
	209	if (flags & BDRV_O_RDWR) {
	210	*access_flags = GENERIC_READ \| GENERIC_WRITE;
	211	} else {
	212	*access_flags = GENERIC_READ;
	213	}
	214
	215	*overlapped = FILE_ATTRIBUTE_NORMAL;
a2736526 PB	216	if (flags & BDRV_O_NATIVE_AIO) {
	217	*overlapped \|= FILE_FLAG_OVERLAPPED;
	218	}
6a8dc042 JC	219	if (flags & BDRV_O_NOCACHE) {
	220	*overlapped \|= FILE_FLAG_NO_BUFFERING;
	221	}
6a8dc042 JC	222	}
6a8dc042 JC	223
ea804cad SW	224	static int raw_open(BlockDriverState bs, const char filename,
ea804cad SW	225	QDict *options, int flags)
223d4670 TS	226	{
223d4670 TS	227	BDRVRawState *s = bs->opaque;
9a2d77ad	228	int access_flags;
223d4670 TS	229	DWORD overlapped;
	230
	231	s->type = FTYPE_FILE;
	232
6a8dc042	233	raw_parse_flags(flags, &access_flags, &overlapped);
a2736526 PB	234
	235	if ((flags & BDRV_O_NATIVE_AIO) && aio == NULL) {
	236	aio = win32_aio_init();
	237	if (aio == NULL) {
	238	return -EINVAL;
	239	}
	240	}
9a2d77ad	241
223d4670 TS	242	s->hfile = CreateFile(filename, access_flags,
223d4670 TS	243	FILE_SHARE_READ, NULL,
9a2d77ad	244	OPEN_EXISTING, overlapped, NULL);
223d4670 TS	245	if (s->hfile == INVALID_HANDLE_VALUE) {
	246	int err = GetLastError();
	247
	248	if (err == ERROR_ACCESS_DENIED)
	249	return -EACCES;
a2736526 PB	250	return -EINVAL;
	251	}
	252
	253	if (flags & BDRV_O_NATIVE_AIO) {
	254	int ret = win32_aio_attach(aio, s->hfile);
	255	if (ret < 0) {
	256	CloseHandle(s->hfile);
	257	return ret;
	258	}
	259	s->aio = aio;
223d4670 TS	260	}
	261	return 0;
	262	}
	263
fc4edb84 PB	264	static BlockDriverAIOCB raw_aio_readv(BlockDriverState bs,
	265	int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
	266	BlockDriverCompletionFunc cb, void opaque)
223d4670 TS	267	{
223d4670 TS	268	BDRVRawState *s = bs->opaque;
a2736526 PB	269	if (s->aio) {
	270	return win32_aio_submit(bs, s->aio, s->hfile, sector_num, qiov,
	271	nb_sectors, cb, opaque, QEMU_AIO_READ);
	272	} else {
	273	return paio_submit(bs, s->hfile, sector_num, qiov, nb_sectors,
	274	cb, opaque, QEMU_AIO_READ);
	275	}
223d4670 TS	276	}
223d4670 TS	277
fc4edb84 PB	278	static BlockDriverAIOCB raw_aio_writev(BlockDriverState bs,
	279	int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
	280	BlockDriverCompletionFunc cb, void opaque)
223d4670 TS	281	{
223d4670 TS	282	BDRVRawState *s = bs->opaque;
a2736526 PB	283	if (s->aio) {
	284	return win32_aio_submit(bs, s->aio, s->hfile, sector_num, qiov,
	285	nb_sectors, cb, opaque, QEMU_AIO_WRITE);
	286	} else {
	287	return paio_submit(bs, s->hfile, sector_num, qiov, nb_sectors,
	288	cb, opaque, QEMU_AIO_WRITE);
	289	}
223d4670 TS	290	}
223d4670 TS	291
fc4edb84 PB	292	static BlockDriverAIOCB raw_aio_flush(BlockDriverState bs,
fc4edb84 PB	293	BlockDriverCompletionFunc cb, void opaque)
223d4670 TS	294	{
223d4670 TS	295	BDRVRawState *s = bs->opaque;
fc4edb84	296	return paio_submit(bs, s->hfile, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH);
223d4670 TS	297	}
	298
	299	static void raw_close(BlockDriverState *bs)
	300	{
	301	BDRVRawState *s = bs->opaque;
	302	CloseHandle(s->hfile);
	303	}
	304
	305	static int raw_truncate(BlockDriverState *bs, int64_t offset)
	306	{
	307	BDRVRawState *s = bs->opaque;
b9e82a59	308	LONG low, high;
fbcad04d	309	DWORD dwPtrLow;
223d4670 TS	310
	311	low = offset;
	312	high = offset >> 32;
fbcad04d FC	313
	314	/*
	315	* An error has occurred if the return value is INVALID_SET_FILE_POINTER
	316	* and GetLastError doesn't return NO_ERROR.
	317	*/
	318	dwPtrLow = SetFilePointer(s->hfile, low, &high, FILE_BEGIN);
	319	if (dwPtrLow == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) {
fccedc62	320	fprintf(stderr, "SetFilePointer error: %lu\n", GetLastError());
fbcad04d FC	321	return -EIO;
	322	}
	323	if (SetEndOfFile(s->hfile) == 0) {
fccedc62	324	fprintf(stderr, "SetEndOfFile error: %lu\n", GetLastError());
223d4670	325	return -EIO;
fbcad04d	326	}
223d4670 TS	327	return 0;
	328	}
	329
	330	static int64_t raw_getlength(BlockDriverState *bs)
	331	{
	332	BDRVRawState *s = bs->opaque;
	333	LARGE_INTEGER l;
	334	ULARGE_INTEGER available, total, total_free;
	335	DISK_GEOMETRY_EX dg;
	336	DWORD count;
	337	BOOL status;
	338
	339	switch(s->type) {
	340	case FTYPE_FILE:
b9e82a59	341	l.LowPart = GetFileSize(s->hfile, (PDWORD)&l.HighPart);
223d4670 TS	342	if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
	343	return -EIO;
	344	break;
	345	case FTYPE_CD:
	346	if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free))
	347	return -EIO;
	348	l.QuadPart = total.QuadPart;
	349	break;
	350	case FTYPE_HARDDISK:
	351	status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
	352	NULL, 0, &dg, sizeof(dg), &count, NULL);
	353	if (status != 0) {
	354	l = dg.DiskSize;
	355	}
	356	break;
	357	default:
	358	return -EIO;
	359	}
	360	return l.QuadPart;
	361	}
	362
4a1d5e1f FZ	363	static int64_t raw_get_allocated_file_size(BlockDriverState *bs)
	364	{
	365	typedef DWORD (WINAPI * get_compressed_t)(const char *filename,
	366	DWORD * high);
	367	get_compressed_t get_compressed;
	368	struct _stati64 st;
	369	const char *filename = bs->filename;
	370	/* WinNT support GetCompressedFileSize to determine allocate size */
	371	get_compressed =
	372	(get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"),
	373	"GetCompressedFileSizeA");
	374	if (get_compressed) {
	375	DWORD high, low;
	376	low = get_compressed(filename, &high);
	377	if (low != 0xFFFFFFFFlu \|\| GetLastError() == NO_ERROR) {
	378	return (((int64_t) high) << 32) + low;
	379	}
	380	}
	381
	382	if (_stati64(filename, &st) < 0) {
	383	return -1;
	384	}
	385	return st.st_size;
	386	}
	387
0e7e1989	388	static int raw_create(const char filename, QEMUOptionParameter options)
223d4670 TS	389	{
223d4670 TS	390	int fd;
0e7e1989	391	int64_t total_size = 0;
223d4670	392
0e7e1989 KW	393	/* Read out options */
	394	while (options && options->name) {
	395	if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
	396	total_size = options->value.n / 512;
	397	}
	398	options++;
	399	}
223d4670	400
6165f4d8 CB	401	fd = qemu_open(filename, O_WRONLY \| O_CREAT \| O_TRUNC \| O_BINARY,
6165f4d8 CB	402	0644);
223d4670 TS	403	if (fd < 0)
	404	return -EIO;
	405	set_sparse(fd);
	406	ftruncate(fd, total_size * 512);
2e1e79da	407	qemu_close(fd);
223d4670 TS	408	return 0;
	409	}
	410
0e7e1989	411	static QEMUOptionParameter raw_create_options[] = {
db08adf5 KW	412	{
	413	.name = BLOCK_OPT_SIZE,
	414	.type = OPT_SIZE,
	415	.help = "Virtual disk size"
	416	},
0e7e1989 KW	417	{ NULL }
	418	};
	419
84a12e66 CH	420	static BlockDriver bdrv_file = {
	421	.format_name = "file",
	422	.protocol_name = "file",
f1b2f712	423	.instance_size = sizeof(BDRVRawState),
66f82cee	424	.bdrv_file_open = raw_open,
f1b2f712 AL	425	.bdrv_close = raw_close,
f1b2f712 AL	426	.bdrv_create = raw_create,
c68b89ac	427
fc4edb84 PB	428	.bdrv_aio_readv = raw_aio_readv,
	429	.bdrv_aio_writev = raw_aio_writev,
	430	.bdrv_aio_flush = raw_aio_flush,
c68b89ac	431
f1b2f712 AL	432	.bdrv_truncate = raw_truncate,
f1b2f712 AL	433	.bdrv_getlength = raw_getlength,
4a1d5e1f FZ	434	.bdrv_get_allocated_file_size
4a1d5e1f FZ	435	= raw_get_allocated_file_size,
0e7e1989 KW	436
0e7e1989 KW	437	.create_options = raw_create_options,
223d4670 TS	438	};
	439
	440	/***********************************************/
	441	/* host device */
	442
	443	static int find_cdrom(char *cdrom_name, int cdrom_name_size)
	444	{
	445	char drives[256], *pdrv = drives;
	446	UINT type;
	447
	448	memset(drives, 0, sizeof(drives));
	449	GetLogicalDriveStrings(sizeof(drives), drives);
	450	while(pdrv[0] != '\0') {
	451	type = GetDriveType(pdrv);
	452	switch(type) {
	453	case DRIVE_CDROM:
	454	snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]);
	455	return 0;
	456	break;
	457	}
	458	pdrv += lstrlen(pdrv) + 1;
	459	}
	460	return -1;
	461	}
	462
	463	static int find_device_type(BlockDriverState bs, const char filename)
	464	{
	465	BDRVRawState *s = bs->opaque;
	466	UINT type;
	467	const char *p;
	468
	469	if (strstart(filename, "\\\\.\\", &p) \|\|
	470	strstart(filename, "//./", &p)) {
	471	if (stristart(p, "PhysicalDrive", NULL))
	472	return FTYPE_HARDDISK;
	473	snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]);
	474	type = GetDriveType(s->drive_path);
3060cd14 AL	475	switch (type) {
	476	case DRIVE_REMOVABLE:
	477	case DRIVE_FIXED:
	478	return FTYPE_HARDDISK;
	479	case DRIVE_CDROM:
223d4670	480	return FTYPE_CD;
3060cd14	481	default:
223d4670	482	return FTYPE_FILE;
3060cd14	483	}
223d4670 TS	484	} else {
	485	return FTYPE_FILE;
	486	}
	487	}
	488
508c7cb3 CH	489	static int hdev_probe_device(const char *filename)
	490	{
	491	if (strstart(filename, "/dev/cdrom", NULL))
	492	return 100;
	493	if (is_windows_drive(filename))
	494	return 100;
	495	return 0;
	496	}
	497
ea804cad SW	498	static int hdev_open(BlockDriverState bs, const char filename,
ea804cad SW	499	QDict *options, int flags)
223d4670 TS	500	{
	501	BDRVRawState *s = bs->opaque;
	502	int access_flags, create_flags;
	503	DWORD overlapped;
	504	char device_name[64];
	505
	506	if (strstart(filename, "/dev/cdrom", NULL)) {
	507	if (find_cdrom(device_name, sizeof(device_name)) < 0)
	508	return -ENOENT;
	509	filename = device_name;
	510	} else {
	511	/* transform drive letters into device name */
	512	if (((filename[0] >= 'a' && filename[0] <= 'z') \|\|
	513	(filename[0] >= 'A' && filename[0] <= 'Z')) &&
	514	filename[1] == ':' && filename[2] == '\0') {
	515	snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]);
	516	filename = device_name;
	517	}
	518	}
	519	s->type = find_device_type(bs, filename);
	520
6a8dc042 JC	521	raw_parse_flags(flags, &access_flags, &overlapped);
6a8dc042 JC	522
223d4670 TS	523	create_flags = OPEN_EXISTING;
223d4670 TS	524
223d4670 TS	525	s->hfile = CreateFile(filename, access_flags,
	526	FILE_SHARE_READ, NULL,
	527	create_flags, overlapped, NULL);
	528	if (s->hfile == INVALID_HANDLE_VALUE) {
	529	int err = GetLastError();
	530
	531	if (err == ERROR_ACCESS_DENIED)
	532	return -EACCES;
	533	return -1;
	534	}
	535	return 0;
	536	}
	537
336c1c12 KW	538	static int hdev_has_zero_init(BlockDriverState *bs)
	539	{
	540	return 0;
	541	}
	542
5efa9d5a	543	static BlockDriver bdrv_host_device = {
e60f469c	544	.format_name = "host_device",
84a12e66	545	.protocol_name = "host_device",
e60f469c	546	.instance_size = sizeof(BDRVRawState),
508c7cb3	547	.bdrv_probe_device = hdev_probe_device,
66f82cee	548	.bdrv_file_open = hdev_open,
e60f469c	549	.bdrv_close = raw_close,
336c1c12	550	.bdrv_has_zero_init = hdev_has_zero_init,
223d4670	551
fc4edb84 PB	552	.bdrv_aio_readv = raw_aio_readv,
	553	.bdrv_aio_writev = raw_aio_writev,
	554	.bdrv_aio_flush = raw_aio_flush,
c68b89ac	555
e60f469c	556	.bdrv_getlength = raw_getlength,
4a1d5e1f FZ	557	.bdrv_get_allocated_file_size
4a1d5e1f FZ	558	= raw_get_allocated_file_size,
223d4670	559	};
5efa9d5a	560
84a12e66	561	static void bdrv_file_init(void)
5efa9d5a	562	{
84a12e66	563	bdrv_register(&bdrv_file);
5efa9d5a AL	564	bdrv_register(&bdrv_host_device);
	565	}
	566
84a12e66	567	block_init(bdrv_file_init);