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VMDK: bugfix, open Haiku vmdk image 

Haiku provides a specially formed vmdk image, which let qemu abort. It a
combination of sparse header and flat data (i.e. with not l1/l2 table at
all). The fix is turn to descriptor when sparse header is zero in field
'capacity'.

Signed-off-by: Fam Zheng <famcool@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Fam Zheng 2011-08-12 23:19:33 +08:00 committed by Kevin Wolf
parent 6c031aac4d
commit f16f509d17
1 changed files with 11 additions and 4 deletions
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15
block/vmdk.c
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@ -408,6 +408,9 @@ static int vmdk_open_vmdk3(BlockDriverState *bs,
return ret;
}
static int vmdk_open_desc_file(BlockDriverState *bs, int flags,
int64_t desc_offset);
static int vmdk_open_vmdk4(BlockDriverState *bs,
BlockDriverState *file,
int flags)
@ -422,6 +425,9 @@ static int vmdk_open_vmdk4(BlockDriverState *bs,
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) {
@ -559,7 +565,7 @@ static int vmdk_parse_extents(const char *desc, BlockDriverState *bs,
extent = vmdk_add_extent(bs, extent_file, true, sectors,
0, 0, 0, 0, sectors);
extent->flat_start_offset = flat_offset;
extent->flat_start_offset = flat_offset << 9;
} else if (!strcmp(type, "SPARSE")) {
/* SPARSE extent */
ret = vmdk_open_sparse(bs, extent_file, bs->open_flags);
@ -582,14 +588,15 @@ next_line:
return 0;
}
static int vmdk_open_desc_file(BlockDriverState *bs, int flags)
static int vmdk_open_desc_file(BlockDriverState *bs, int flags,
int64_t desc_offset)
{
int ret;
char buf[2048];
char ct[128];
BDRVVmdkState *s = bs->opaque;
ret = bdrv_pread(bs->file, 0, buf, sizeof(buf));
ret = bdrv_pread(bs->file, desc_offset, buf, sizeof(buf));
if (ret < 0) {
return ret;
}
@ -635,7 +642,7 @@ static int vmdk_open(BlockDriverState *bs, int flags)
s->parent_cid = vmdk_read_cid(bs, 1);
return 0;
} else {
return vmdk_open_desc_file(bs, flags);
return vmdk_open_desc_file(bs, flags, 0);
}
}