diff options
Diffstat (limited to 'block/vmdk.c')
| -rw-r--r-- | block/vmdk.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/block/vmdk.c b/block/vmdk.c index 5fb6c813ef..88d09e3e16 100644 --- a/block/vmdk.c +++ b/block/vmdk.c @@ -605,13 +605,20 @@ static int vmdk_open_vmdk4(BlockDriverState *bs, header = footer.header; } - if (le32_to_cpu(header.version) >= 3) { + if (le32_to_cpu(header.version) > 3) { char buf[64]; snprintf(buf, sizeof(buf), "VMDK version %d", le32_to_cpu(header.version)); qerror_report(QERR_UNKNOWN_BLOCK_FORMAT_FEATURE, bs->device_name, "vmdk", buf); return -ENOTSUP; + } else if (le32_to_cpu(header.version) == 3 && (flags & BDRV_O_RDWR)) { + /* 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 + * information. So we are safe to enable read only. */ + error_setg(errp, "VMDK version 3 must be read only"); + return -EINVAL; } if (le32_to_cpu(header.num_gtes_per_gt) > 512) { |