static int enable_write_target(BDRVVVFATState *s, Error **errp)

{

    BlockDriver *bdrv_qcow = NULL;

    QemuOpts *opts = NULL;

    int ret;

    int size = sector2cluster(s, s->sector_count);

    s->used_clusters = calloc(size, 1);



    array_init(&(s->commits), sizeof(commit_t));



    s->qcow_filename = g_malloc(1024);

    ret = get_tmp_filename(s->qcow_filename, 1024);

    if (ret < 0) {

        error_setg_errno(errp, -ret, "can't create temporary file");

        goto err;

    }



    bdrv_qcow = bdrv_find_format("qcow");

    if (!bdrv_qcow) {

        error_setg(errp, "Failed to locate qcow driver");

        ret = -ENOENT;

        goto err;

    }



    opts = qemu_opts_create(bdrv_qcow->create_opts, NULL, 0, &error_abort);

    qemu_opt_set_number(opts, BLOCK_OPT_SIZE, s->sector_count * 512);

    qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, "fat:");



    ret = bdrv_create(bdrv_qcow, s->qcow_filename, opts, errp);

    qemu_opts_del(opts);

    if (ret < 0) {

        goto err;

    }



    s->qcow = NULL;

    ret = bdrv_open(&s->qcow, s->qcow_filename, NULL, NULL,

                    BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH,

                    bdrv_qcow, errp);

    if (ret < 0) {

        goto err;

    }



#ifndef _WIN32

    unlink(s->qcow_filename);

#endif



    bdrv_set_backing_hd(s->bs, bdrv_new());

    s->bs->backing_hd->drv = &vvfat_write_target;

    s->bs->backing_hd->opaque = g_new(void *, 1);

    *(void**)s->bs->backing_hd->opaque = s;



    return 0;



err:

    g_free(s->qcow_filename);

    s->qcow_filename = NULL;

    return ret;

}

static int enable_write_target(BDRVVVFATState *s, Error **errp)

{

    BlockDriver *bdrv_qcow = NULL;

    QemuOpts *opts = NULL;

    int ret;

    int size = sector2cluster(s, s->sector_count);

    s->used_clusters = calloc(size, 1);



    array_init(&(s->commits), sizeof(commit_t));



    s->qcow_filename = g_malloc(1024);

    ret = get_tmp_filename(s->qcow_filename, 1024);

    if (ret < 0) {

        error_setg_errno(errp, -ret, "can't create temporary file");

        goto err;

    }



    bdrv_qcow = bdrv_find_format("qcow");

    if (!bdrv_qcow) {

        error_setg(errp, "Failed to locate qcow driver");

        ret = -ENOENT;

        goto err;

    }



    opts = qemu_opts_create(bdrv_qcow->create_opts, NULL, 0, &error_abort);

    qemu_opt_set_number(opts, BLOCK_OPT_SIZE, s->sector_count * 512);

    qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, "fat:");



    ret = bdrv_create(bdrv_qcow, s->qcow_filename, opts, errp);

    qemu_opts_del(opts);

    if (ret < 0) {

        goto err;

    }



    s->qcow = NULL;

    ret = bdrv_open(&s->qcow, s->qcow_filename, NULL, NULL,

                    BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH,

                    bdrv_qcow, errp);

    if (ret < 0) {

        goto err;

    }



#ifndef _WIN32

    unlink(s->qcow_filename);

#endif



    bdrv_set_backing_hd(s->bs, bdrv_new());

    s->bs->backing_hd->drv = &vvfat_write_target;

    s->bs->backing_hd->opaque = g_new(void *, 1);

    *(void**)s->bs->backing_hd->opaque = s;



    return 0;



err:

    g_free(s->qcow_filename);

    s->qcow_filename = NULL;

    return ret;

}

static int FUNC_0(BDRVVVFATState *VAR_0, Error **VAR_1)

{

    BlockDriver *bdrv_qcow = NULL;

    QemuOpts *opts = NULL;

    int VAR_2;

    int VAR_3 = sector2cluster(VAR_0, VAR_0->sector_count);

    VAR_0->used_clusters = calloc(VAR_3, 1);



    array_init(&(VAR_0->commits), sizeof(commit_t));



    VAR_0->qcow_filename = g_malloc(1024);

    VAR_2 = get_tmp_filename(VAR_0->qcow_filename, 1024);

    if (VAR_2 < 0) {

        error_setg_errno(VAR_1, -VAR_2, "can't create temporary file");

        goto err;

    }



    bdrv_qcow = bdrv_find_format("qcow");

    if (!bdrv_qcow) {

        error_setg(VAR_1, "Failed to locate qcow driver");

        VAR_2 = -ENOENT;

        goto err;

    }



    opts = qemu_opts_create(bdrv_qcow->create_opts, NULL, 0, &error_abort);

    qemu_opt_set_number(opts, BLOCK_OPT_SIZE, VAR_0->sector_count * 512);

    qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, "fat:");



    VAR_2 = bdrv_create(bdrv_qcow, VAR_0->qcow_filename, opts, VAR_1);

    qemu_opts_del(opts);

    if (VAR_2 < 0) {

        goto err;

    }



    VAR_0->qcow = NULL;

    VAR_2 = bdrv_open(&VAR_0->qcow, VAR_0->qcow_filename, NULL, NULL,

                    BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH,

                    bdrv_qcow, VAR_1);

    if (VAR_2 < 0) {

        goto err;

    }



#ifndef _WIN32

    unlink(VAR_0->qcow_filename);

#endif



    bdrv_set_backing_hd(VAR_0->bs, bdrv_new());

    VAR_0->bs->backing_hd->drv = &vvfat_write_target;

    VAR_0->bs->backing_hd->opaque = g_new(void *, 1);

    *(void**)VAR_0->bs->backing_hd->opaque = VAR_0;



    return 0;



err:

    g_free(VAR_0->qcow_filename);

    VAR_0->qcow_filename = NULL;

    return VAR_2;

}

static int FUNC_0(BDRVVVFATState *VAR_0, Error **VAR_1)
{ BlockDriver *bdrv_qcow = NULL; QemuOpts *opts = NULL; int VAR_2; int VAR_3 = sector2cluster(VAR_0, VAR_0->sector_count); VAR_0->used_clusters = calloc(VAR_3, 1); array_init(&(VAR_0->commits), sizeof(commit_t)); VAR_0->qcow_filename = g_malloc(1024); VAR_2 = get_tmp_filename(VAR_0->qcow_filename, 1024); if (VAR_2 < 0) { error_setg_errno(VAR_1, -VAR_2, "can't create temporary file"); goto err; } bdrv_qcow = bdrv_find_format("qcow"); if (!bdrv_qcow) { error_setg(VAR_1, "Failed to locate qcow driver"); VAR_2 = -ENOENT; goto err; } opts = qemu_opts_create(bdrv_qcow->create_opts, NULL, 0, &error_abort); qemu_opt_set_number(opts, BLOCK_OPT_SIZE, VAR_0->sector_count * 512); qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, "fat:"); VAR_2 = bdrv_create(bdrv_qcow, VAR_0->qcow_filename, opts, VAR_1); qemu_opts_del(opts); if (VAR_2 < 0) { goto err; } VAR_0->qcow = NULL; VAR_2 = bdrv_open(&VAR_0->qcow, VAR_0->qcow_filename, NULL, NULL,
BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH,
bdrv_qcow, VAR_1); if (VAR_2 < 0) { goto err; } #ifndef _WIN32
unlink(VAR_0->qcow_filename); #endif
bdrv_set_backing_hd(VAR_0->bs, bdrv_new()); VAR_0->bs->backing_hd->drv = &vvfat_write_target; VAR_0->bs->backing_hd->opaque = g_new(void *, 1); *(void**)VAR_0->bs->backing_hd->opaque = VAR_0; return 0; err:
g_free(VAR_0->qcow_filename); VAR_0->qcow_filename = NULL; return VAR_2; }