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vmdk: Fix converting to streamOptimized 

Commit d62d9dc4b8 lifted streamOptimized images's version to 3, but we
now refuse to open version 3 images read-write.  We need to make
streamOptimized an exception to allow converting to it. This fixes the
accidentally broken iotests case 059 for the same reason.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Fam Zheng 2016-01-25 10:26:23 +08:00 committed by Max Reitz
parent 327032ce74
commit 3db1d98a20
1 changed files with 5 additions and 1 deletions
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6
block/vmdk.c
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@ -571,6 +571,7 @@ static int vmdk_open_vmdk4(BlockDriverState *bs,
VmdkExtent *extent;
BDRVVmdkState *s = bs->opaque;
int64_t l1_backup_offset = 0;
bool compressed;
ret = bdrv_pread(file->bs, sizeof(magic), &header, sizeof(header));
if (ret < 0) {
@ -645,6 +646,8 @@ static int vmdk_open_vmdk4(BlockDriverState *bs,
header = footer.header;
}
compressed =
le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE;
if (le32_to_cpu(header.version) > 3) {
char buf[64];
snprintf(buf, sizeof(buf), "VMDK version %" PRId32,
@ -652,7 +655,8 @@ static int vmdk_open_vmdk4(BlockDriverState *bs,
error_setg(errp, QERR_UNKNOWN_BLOCK_FORMAT_FEATURE,
bdrv_get_device_or_node_name(bs), "vmdk", buf);
return -ENOTSUP;
} else if (le32_to_cpu(header.version) == 3 && (flags & BDRV_O_RDWR)) {
} else if (le32_to_cpu(header.version) == 3 && (flags & BDRV_O_RDWR) &&
!compressed) {
/* VMware KB 2064959 explains that version 3 added support for
* persistent changed block tracking (CBT), and backup software can
* read it as version=1 if it doesn't care about the changed area