static int vmdk_open_vmdk3(BlockDriverState *bs,
BlockDriverState *file,
int flags)
{
int ret;
uint32_t magic;
VMDK3Header header;
VmdkExtent *extent;
ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header));
if (ret < 0) {
return ret;
}
extent = vmdk_add_extent(bs,
bs->file, false,
le32_to_cpu(header.disk_sectors),
le32_to_cpu(header.l1dir_offset) << 9,
0, 1 << 6, 1 << 9,
le32_to_cpu(header.granularity));
ret = vmdk_init_tables(bs, extent);
if (ret) {
/* free extent allocated by vmdk_add_extent */
vmdk_free_last_extent(bs);
}
return ret;
}
static int vmdk_open_vmdk4(BlockDriverState *bs,
BlockDriverState *file,
int flags)
{
int ret;
uint32_t magic;
uint32_t l1_size, l1_entry_sectors;
VMDK4Header header;
VmdkExtent *extent;
int64_t l1_backup_offset = 0;
ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header));
if (ret < 0) {
return ret;
}
if (header.capacity == 0 && header.desc_offset) {
return vmdk_open_desc_file(bs, flags, header.desc_offset << 9);
}
l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gte)
* le64_to_cpu(header.granularity);
if (l1_entry_sectors <= 0) {
return -EINVAL;
}
l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1)
/ l1_entry_sectors;
if (le32_to_cpu(header.flags) & VMDK4_FLAG_RGD) {
l1_backup_offset = le64_to_cpu(header.rgd_offset) << 9;
}
extent = vmdk_add_extent(bs, file, false,
le64_to_cpu(header.capacity),
le64_to_cpu(header.gd_offset) << 9,
l1_backup_offset,
l1_size,
le32_to_cpu(header.num_gtes_per_gte),
le64_to_cpu(header.granularity));
extent->compressed =
le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE;
extent->has_marker = le32_to_cpu(header.flags) & VMDK4_FLAG_MARKER;
ret = vmdk_init_tables(bs, extent);
if (ret) {
/* free extent allocated by vmdk_add_extent */
vmdk_free_last_extent(bs);
}
return ret;
}
static int vmdk_open_vmdk4(BlockDriverState *bs,
BlockDriverState *file,
int flags)
{
int ret;
uint32_t magic;
uint32_t l1_size, l1_entry_sectors;
VMDK4Header header;
VmdkExtent *extent;
int64_t l1_backup_offset = 0;
ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header));
if (ret < 0) {
return ret;
}
if (header.capacity == 0 && header.desc_offset) {
return vmdk_open_desc_file(bs, flags, header.desc_offset << 9);
}
if (le64_to_cpu(header.gd_offset) == VMDK4_GD_AT_END) {
/*
* The footer takes precedence over the header, so read it in. The
* footer starts at offset -1024 from the end: One sector for the
* footer, and another one for the end-of-stream marker.
*/
struct {
struct {
uint64_t val;
uint32_t size;
uint32_t type;
uint8_t pad[512 - 16];
} QEMU_PACKED footer_marker;
uint32_t magic;
VMDK4Header header;
uint8_t pad[512 - 4 - sizeof(VMDK4Header)];
struct {
uint64_t val;
uint32_t size;
uint32_t type;
uint8_t pad[512 - 16];
} QEMU_PACKED eos_marker;
} QEMU_PACKED footer;
ret = bdrv_pread(file,
bs->file->total_sectors * 512 - 1536,
&footer, sizeof(footer));
if (ret < 0) {
return ret;
}
/* Some sanity checks for the footer */
if (be32_to_cpu(footer.magic) != VMDK4_MAGIC ||
le32_to_cpu(footer.footer_marker.size) != 0 ||
le32_to_cpu(footer.footer_marker.type) != MARKER_FOOTER ||
le64_to_cpu(footer.eos_marker.val) != 0 ||
le32_to_cpu(footer.eos_marker.size) != 0 ||
le32_to_cpu(footer.eos_marker.type) != MARKER_END_OF_STREAM)
{
return -EINVAL;
}
header = footer.header;
}
l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gte)
* le64_to_cpu(header.granularity);
if (l1_entry_sectors == 0) {
return -EINVAL;
}
l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1)
/ l1_entry_sectors;
if (le32_to_cpu(header.flags) & VMDK4_FLAG_RGD) {
l1_backup_offset = le64_to_cpu(header.rgd_offset) << 9;
}
extent = vmdk_add_extent(bs, file, false,
le64_to_cpu(header.capacity),
le64_to_cpu(header.gd_offset) << 9,
l1_backup_offset,
l1_size,
le32_to_cpu(header.num_gtes_per_gte),
le64_to_cpu(header.granularity));
extent->compressed =
le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE;
extent->has_marker = le32_to_cpu(header.flags) & VMDK4_FLAG_MARKER;
ret = vmdk_init_tables(bs, extent);
if (ret) {
/* free extent allocated by vmdk_add_extent */
vmdk_free_last_extent(bs);
}
return ret;
}
