** Changed in: qemu
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1075252
Title:
qemu-img cannot read VMDK4 file
Status in QEMU:
Fix Released
Bug description:
Unable to read any vmdk4 type files. Goal was to convert to a qcow2,
this worked after emitting code.
OS is Centos linux 2.6.32. I pulled the latest git tree down for qemu
to see if this was resolved, it is not.
Starting program: /home/rhubbard/QEMU/qemu/qemu-img info -f vmdk
/root/Juniper/beta1candidate-07122012-disk1.vmdk
There seems a mismatch with the l1_backup_tble_offset. this is now a uint64
type. The value is actually "-512" because of this and this causes the code
check at line 418 in vmdk.c to erroneously think there is a backup table. This
causes vmdk open to fail.
and message
qemu failed to open ....
from debug;
gdb) x/4x &(s->l1_backup_table_offset)
0xa61cd0: 0xfffffe00 0xffffffff 0x00a62770 0x00000000
(gdb) p *s
$1 = {hd = 0x0, l1_table_offset = 0, l1_backup_table_offset = -512, l1_table
= 0xa62770,
l1_backup_table = 0x0, l1_size = 64, l1_entry_sectors = 65536, l2_size =
512, l2_cache = 0x0,
l2_cache_offsets = {0 <repeats 16 times>}, l2_cache_counts = {0 <repeats 16
times>},
cluster_sectors = 128, parent_cid = 4294967295}
typedef struct BDRVVmdkState {
BlockDriverState *hd;
int64_t l1_table_offset; <====
??? - what should this be , don't know what the actual layout on the vmdk spec
says , is this a 64bit / 8 byte field ?
int64_t l1_backup_table_offset;
uint32_t *l1_table;
uint32_t *l1_backup_table;
unsigned int l1_size;
uint32_t l1_entry_sectors;
unsigned int l2_size;
from vmdk.c
/*!!! if (s->l1_backup_table_offset) {
s->l1_backup_table = qemu_malloc(l1_size);
if (bdrv_pread(bs->file, s->l1_backup_table_offset,
s->l1_backup_table, l1_size) != l1_size)
goto fail;
Breaks here..
Don't know the correct fix , thanks for help.
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