static int get_cluster_offset(BlockDriverState *bs,

                              VmdkExtent *extent,

                              VmdkMetaData *m_data,

                              uint64_t offset,

                              bool allocate,

                              uint64_t *cluster_offset,

                              uint64_t skip_start_bytes,

                              uint64_t skip_end_bytes)

{

    unsigned int l1_index, l2_offset, l2_index;

    int min_index, i, j;

    uint32_t min_count, *l2_table;

    bool zeroed = false;

    int64_t ret;

    int64_t cluster_sector;



    if (m_data) {

        m_data->valid = 0;

    }

    if (extent->flat) {

        *cluster_offset = extent->flat_start_offset;

        return VMDK_OK;

    }



    offset -= (extent->end_sector - extent->sectors) * SECTOR_SIZE;

    l1_index = (offset >> 9) / extent->l1_entry_sectors;

    if (l1_index >= extent->l1_size) {

        return VMDK_ERROR;

    }

    l2_offset = extent->l1_table[l1_index];

    if (!l2_offset) {

        return VMDK_UNALLOC;

    }

    for (i = 0; i < L2_CACHE_SIZE; i++) {

        if (l2_offset == extent->l2_cache_offsets[i]) {

            /* increment the hit count */

            if (++extent->l2_cache_counts[i] == 0xffffffff) {

                for (j = 0; j < L2_CACHE_SIZE; j++) {

                    extent->l2_cache_counts[j] >>= 1;

                }

            }

            l2_table = extent->l2_cache + (i * extent->l2_size);

            goto found;

        }

    }

    /* not found: load a new entry in the least used one */

    min_index = 0;

    min_count = 0xffffffff;

    for (i = 0; i < L2_CACHE_SIZE; i++) {

        if (extent->l2_cache_counts[i] < min_count) {

            min_count = extent->l2_cache_counts[i];

            min_index = i;

        }

    }

    l2_table = extent->l2_cache + (min_index * extent->l2_size);

    if (bdrv_pread(extent->file,

                (int64_t)l2_offset * 512,

                l2_table,

                extent->l2_size * sizeof(uint32_t)

            ) != extent->l2_size * sizeof(uint32_t)) {

        return VMDK_ERROR;

    }



    extent->l2_cache_offsets[min_index] = l2_offset;

    extent->l2_cache_counts[min_index] = 1;

 found:

    l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size;

    cluster_sector = le32_to_cpu(l2_table[l2_index]);



    if (m_data) {

        m_data->valid = 1;

        m_data->l1_index = l1_index;

        m_data->l2_index = l2_index;

        m_data->l2_offset = l2_offset;

        m_data->l2_cache_entry = &l2_table[l2_index];

    }

    if (extent->has_zero_grain && cluster_sector == VMDK_GTE_ZEROED) {

        zeroed = true;

    }



    if (!cluster_sector || zeroed) {

        if (!allocate) {

            return zeroed ? VMDK_ZEROED : VMDK_UNALLOC;

        }



        cluster_sector = extent->next_cluster_sector;

        extent->next_cluster_sector += extent->cluster_sectors;



        /* First of all we write grain itself, to avoid race condition

         * that may to corrupt the image.

         * This problem may occur because of insufficient space on host disk

         * or inappropriate VM shutdown.

         */

        ret = get_whole_cluster(bs, extent, cluster_sector * BDRV_SECTOR_SIZE,

                                offset, skip_start_bytes, skip_end_bytes);

        if (ret) {

            return ret;

        }

    }

    *cluster_offset = cluster_sector << BDRV_SECTOR_BITS;

    return VMDK_OK;

}

static int get_cluster_offset(BlockDriverState *bs,

                              VmdkExtent *extent,

                              VmdkMetaData *m_data,

                              uint64_t offset,

                              bool allocate,

                              uint64_t *cluster_offset,

                              uint64_t skip_start_bytes,

                              uint64_t skip_end_bytes)

{

    unsigned int l1_index, l2_offset, l2_index;

    int min_index, i, j;

    uint32_t min_count, *l2_table;

    bool zeroed = false;

    int64_t ret;

    int64_t cluster_sector;



    if (m_data) {

        m_data->valid = 0;

    }

    if (extent->flat) {

        *cluster_offset = extent->flat_start_offset;

        return VMDK_OK;

    }



    offset -= (extent->end_sector - extent->sectors) * SECTOR_SIZE;

    l1_index = (offset >> 9) / extent->l1_entry_sectors;

    if (l1_index >= extent->l1_size) {

        return VMDK_ERROR;

    }

    l2_offset = extent->l1_table[l1_index];

    if (!l2_offset) {

        return VMDK_UNALLOC;

    }

    for (i = 0; i < L2_CACHE_SIZE; i++) {

        if (l2_offset == extent->l2_cache_offsets[i]) {

            

            if (++extent->l2_cache_counts[i] == 0xffffffff) {

                for (j = 0; j < L2_CACHE_SIZE; j++) {

                    extent->l2_cache_counts[j] >>= 1;

                }

            }

            l2_table = extent->l2_cache + (i * extent->l2_size);

            goto found;

        }

    }

    

    min_index = 0;

    min_count = 0xffffffff;

    for (i = 0; i < L2_CACHE_SIZE; i++) {

        if (extent->l2_cache_counts[i] < min_count) {

            min_count = extent->l2_cache_counts[i];

            min_index = i;

        }

    }

    l2_table = extent->l2_cache + (min_index * extent->l2_size);

    if (bdrv_pread(extent->file,

                (int64_t)l2_offset * 512,

                l2_table,

                extent->l2_size * sizeof(uint32_t)

            ) != extent->l2_size * sizeof(uint32_t)) {

        return VMDK_ERROR;

    }



    extent->l2_cache_offsets[min_index] = l2_offset;

    extent->l2_cache_counts[min_index] = 1;

 found:

    l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size;

    cluster_sector = le32_to_cpu(l2_table[l2_index]);



    if (m_data) {

        m_data->valid = 1;

        m_data->l1_index = l1_index;

        m_data->l2_index = l2_index;

        m_data->l2_offset = l2_offset;

        m_data->l2_cache_entry = &l2_table[l2_index];

    }

    if (extent->has_zero_grain && cluster_sector == VMDK_GTE_ZEROED) {

        zeroed = true;

    }



    if (!cluster_sector || zeroed) {

        if (!allocate) {

            return zeroed ? VMDK_ZEROED : VMDK_UNALLOC;

        }



        cluster_sector = extent->next_cluster_sector;

        extent->next_cluster_sector += extent->cluster_sectors;



        









        ret = get_whole_cluster(bs, extent, cluster_sector * BDRV_SECTOR_SIZE,

                                offset, skip_start_bytes, skip_end_bytes);

        if (ret) {

            return ret;

        }

    }

    *cluster_offset = cluster_sector << BDRV_SECTOR_BITS;

    return VMDK_OK;

}

static int FUNC_0(BlockDriverState *VAR_0,

                              VmdkExtent *VAR_1,

                              VmdkMetaData *VAR_2,

                              uint64_t VAR_3,

                              bool VAR_4,

                              uint64_t *VAR_5,

                              uint64_t VAR_6,

                              uint64_t VAR_7)

{

    unsigned int VAR_8, VAR_9, VAR_10;

    int VAR_11, VAR_12, VAR_13;

    uint32_t min_count, *l2_table;

    bool zeroed = false;

    int64_t ret;

    int64_t cluster_sector;



    if (VAR_2) {

        VAR_2->valid = 0;

    }

    if (VAR_1->flat) {

        *VAR_5 = VAR_1->flat_start_offset;

        return VMDK_OK;

    }



    VAR_3 -= (VAR_1->end_sector - VAR_1->sectors) * SECTOR_SIZE;

    VAR_8 = (VAR_3 >> 9) / VAR_1->l1_entry_sectors;

    if (VAR_8 >= VAR_1->l1_size) {

        return VMDK_ERROR;

    }

    VAR_9 = VAR_1->l1_table[VAR_8];

    if (!VAR_9) {

        return VMDK_UNALLOC;

    }

    for (VAR_12 = 0; VAR_12 < L2_CACHE_SIZE; VAR_12++) {

        if (VAR_9 == VAR_1->l2_cache_offsets[VAR_12]) {

            

            if (++VAR_1->l2_cache_counts[VAR_12] == 0xffffffff) {

                for (VAR_13 = 0; VAR_13 < L2_CACHE_SIZE; VAR_13++) {

                    VAR_1->l2_cache_counts[VAR_13] >>= 1;

                }

            }

            l2_table = VAR_1->l2_cache + (VAR_12 * VAR_1->l2_size);

            goto found;

        }

    }

    

    VAR_11 = 0;

    min_count = 0xffffffff;

    for (VAR_12 = 0; VAR_12 < L2_CACHE_SIZE; VAR_12++) {

        if (VAR_1->l2_cache_counts[VAR_12] < min_count) {

            min_count = VAR_1->l2_cache_counts[VAR_12];

            VAR_11 = VAR_12;

        }

    }

    l2_table = VAR_1->l2_cache + (VAR_11 * VAR_1->l2_size);

    if (bdrv_pread(VAR_1->file,

                (int64_t)VAR_9 * 512,

                l2_table,

                VAR_1->l2_size * sizeof(uint32_t)

            ) != VAR_1->l2_size * sizeof(uint32_t)) {

        return VMDK_ERROR;

    }



    VAR_1->l2_cache_offsets[VAR_11] = VAR_9;

    VAR_1->l2_cache_counts[VAR_11] = 1;

 found:

    VAR_10 = ((VAR_3 >> 9) / VAR_1->cluster_sectors) % VAR_1->l2_size;

    cluster_sector = le32_to_cpu(l2_table[VAR_10]);



    if (VAR_2) {

        VAR_2->valid = 1;

        VAR_2->VAR_8 = VAR_8;

        VAR_2->VAR_10 = VAR_10;

        VAR_2->VAR_9 = VAR_9;

        VAR_2->l2_cache_entry = &l2_table[VAR_10];

    }

    if (VAR_1->has_zero_grain && cluster_sector == VMDK_GTE_ZEROED) {

        zeroed = true;

    }



    if (!cluster_sector || zeroed) {

        if (!VAR_4) {

            return zeroed ? VMDK_ZEROED : VMDK_UNALLOC;

        }



        cluster_sector = VAR_1->next_cluster_sector;

        VAR_1->next_cluster_sector += VAR_1->cluster_sectors;



        









        ret = get_whole_cluster(VAR_0, VAR_1, cluster_sector * BDRV_SECTOR_SIZE,

                                VAR_3, VAR_6, VAR_7);

        if (ret) {

            return ret;

        }

    }

    *VAR_5 = cluster_sector << BDRV_SECTOR_BITS;

    return VMDK_OK;

}

static int FUNC_0(BlockDriverState *VAR_0,
VmdkExtent *VAR_1,
VmdkMetaData *VAR_2,
uint64_t VAR_3,
bool VAR_4,
uint64_t *VAR_5,
uint64_t VAR_6,
uint64_t VAR_7)
{ unsigned int VAR_8, VAR_9, VAR_10; int VAR_11, VAR_12, VAR_13; uint32_t min_count, *l2_table; bool zeroed = false; int64_t ret; int64_t cluster_sector; if (VAR_2) { VAR_2->valid = 0; } if (VAR_1->flat) { *VAR_5 = VAR_1->flat_start_offset; return VMDK_OK; } VAR_3 -= (VAR_1->end_sector - VAR_1->sectors) * SECTOR_SIZE; VAR_8 = (VAR_3 >> 9) / VAR_1->l1_entry_sectors; if (VAR_8 >= VAR_1->l1_size) { return VMDK_ERROR; } VAR_9 = VAR_1->l1_table[VAR_8]; if (!VAR_9) { return VMDK_UNALLOC; } for (VAR_12 = 0; VAR_12 < L2_CACHE_SIZE; VAR_12++) { if (VAR_9 == VAR_1->l2_cache_offsets[VAR_12]) { if (++VAR_1->l2_cache_counts[VAR_12] == 0xffffffff) { for (VAR_13 = 0; VAR_13 < L2_CACHE_SIZE; VAR_13++) { VAR_1->l2_cache_counts[VAR_13] >>= 1; } } l2_table = VAR_1->l2_cache + (VAR_12 * VAR_1->l2_size); goto found; } } VAR_11 = 0; min_count = 0xffffffff; for (VAR_12 = 0; VAR_12 < L2_CACHE_SIZE; VAR_12++) { if (VAR_1->l2_cache_counts[VAR_12] < min_count) { min_count = VAR_1->l2_cache_counts[VAR_12]; VAR_11 = VAR_12; } } l2_table = VAR_1->l2_cache + (VAR_11 * VAR_1->l2_size); if (bdrv_pread(VAR_1->file,
(int64_t)VAR_9 * 512,
l2_table,
VAR_1->l2_size * sizeof(uint32_t)
) != VAR_1->l2_size * sizeof(uint32_t)) { return VMDK_ERROR; } VAR_1->l2_cache_offsets[VAR_11] = VAR_9; VAR_1->l2_cache_counts[VAR_11] = 1; found:
VAR_10 = ((VAR_3 >> 9) / VAR_1->cluster_sectors) % VAR_1->l2_size; cluster_sector = le32_to_cpu(l2_table[VAR_10]); if (VAR_2) { VAR_2->valid = 1; VAR_2->VAR_8 = VAR_8; VAR_2->VAR_10 = VAR_10; VAR_2->VAR_9 = VAR_9; VAR_2->l2_cache_entry = &l2_table[VAR_10]; } if (VAR_1->has_zero_grain && cluster_sector == VMDK_GTE_ZEROED) { zeroed = true; } if (!cluster_sector || zeroed) { if (!VAR_4) { return zeroed ? VMDK_ZEROED : VMDK_UNALLOC; } cluster_sector = VAR_1->next_cluster_sector; VAR_1->next_cluster_sector += VAR_1->cluster_sectors; ret = get_whole_cluster(VAR_0, VAR_1, cluster_sector * BDRV_SECTOR_SIZE,
VAR_3, VAR_6, VAR_7); if (ret) { return ret; } } *VAR_5 = cluster_sector << BDRV_SECTOR_BITS; return VMDK_OK; }