diff options
Diffstat (limited to 'block/vhdx.c')
| -rw-r--r-- | block/vhdx.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/block/vhdx.c b/block/vhdx.c index 06f2b1a0cb..bb3ed45d5c 100644 --- a/block/vhdx.c +++ b/block/vhdx.c @@ -1174,7 +1174,18 @@ static void vhdx_update_bat_table_entry(BlockDriverState *bs, BDRVVHDXState *s, { /* The BAT entry is a uint64, with 44 bits for the file offset in units of * 1MB, and 3 bits for the block state. */ - s->bat[sinfo->bat_idx] = sinfo->file_offset; + if ((state == PAYLOAD_BLOCK_ZERO) || + (state == PAYLOAD_BLOCK_UNDEFINED) || + (state == PAYLOAD_BLOCK_NOT_PRESENT) || + (state == PAYLOAD_BLOCK_UNMAPPED)) { + s->bat[sinfo->bat_idx] = 0; /* For PAYLOAD_BLOCK_ZERO, the + FileOffsetMB field is denoted as + 'reserved' in the v1.0 spec. If it is + non-zero, MS Hyper-V will fail to read + the disk image */ + } else { + s->bat[sinfo->bat_idx] = sinfo->file_offset; + } s->bat[sinfo->bat_idx] |= state & VHDX_BAT_STATE_BIT_MASK; |