diff options
| -rw-r--r-- | block/vpc.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/block/vpc.c b/block/vpc.c index d18ecc3..3418664 100644 --- a/block/vpc.c +++ b/block/vpc.c @@ -822,8 +822,9 @@ static int calculate_geometry(int64_t total_sectors, uint16_t *cyls, static int create_dynamic_disk(BlockBackend *blk, uint8_t *buf, int64_t total_sectors) { + uint8_t dyndisk_header_buf[1024]; VHDDynDiskHeader *dyndisk_header = - (VHDDynDiskHeader *) buf; + (VHDDynDiskHeader *)dyndisk_header_buf; uint8_t bat_sector[512]; size_t block_size, num_bat_entries; int i; @@ -858,7 +859,7 @@ static int create_dynamic_disk(BlockBackend *blk, uint8_t *buf, } /* Prepare the Dynamic Disk Header */ - memset(buf, 0, 1024); + memset(dyndisk_header_buf, 0, 1024); memcpy(dyndisk_header->magic, "cxsparse", 8); @@ -872,12 +873,13 @@ static int create_dynamic_disk(BlockBackend *blk, uint8_t *buf, dyndisk_header->block_size = cpu_to_be32(block_size); dyndisk_header->max_table_entries = cpu_to_be32(num_bat_entries); - dyndisk_header->checksum = cpu_to_be32(vpc_checksum(buf, 1024)); + dyndisk_header->checksum = cpu_to_be32(vpc_checksum(dyndisk_header_buf, + 1024)); /* Write the header */ offset = 512; - ret = blk_pwrite(blk, offset, buf, 1024, 0); + ret = blk_pwrite(blk, offset, dyndisk_header_buf, 1024, 0); if (ret < 0) { goto fail; } @@ -972,8 +974,8 @@ static int coroutine_fn vpc_co_create(BlockdevCreateOptions *opts, BlockBackend *blk = NULL; BlockDriverState *bs = NULL; - uint8_t buf[1024]; - VHDFooter *footer = (VHDFooter *) buf; + uint8_t footer_buf[HEADER_SIZE]; + VHDFooter *footer = (VHDFooter *)footer_buf; uint16_t cyls = 0; uint8_t heads = 0; uint8_t secs_per_cyl = 0; @@ -1036,7 +1038,7 @@ static int coroutine_fn vpc_co_create(BlockdevCreateOptions *opts, } /* Prepare the Hard Disk Footer */ - memset(buf, 0, 1024); + memset(footer_buf, 0, HEADER_SIZE); memcpy(footer->creator, "conectix", 8); if (vpc_opts->force_size) { @@ -1069,15 +1071,15 @@ static int coroutine_fn vpc_co_create(BlockdevCreateOptions *opts, qemu_uuid_generate(&uuid); footer->uuid = uuid; - footer->checksum = cpu_to_be32(vpc_checksum(buf, HEADER_SIZE)); + footer->checksum = cpu_to_be32(vpc_checksum(footer_buf, HEADER_SIZE)); if (disk_type == VHD_DYNAMIC) { - ret = create_dynamic_disk(blk, buf, total_sectors); + ret = create_dynamic_disk(blk, footer_buf, total_sectors); if (ret < 0) { error_setg(errp, "Unable to create or write VHD header"); } } else { - ret = create_fixed_disk(blk, buf, total_size, errp); + ret = create_fixed_disk(blk, footer_buf, total_size, errp); } out: |