• Asias He's avatar
    block: Introduce bs->zero_beyond_eof · 0d51b4de
    Asias He authored
    
    
    In 4146b46c42e0989cb5842e04d88ab6ccb1713a48 (block: Produce zeros when
    protocols reading beyond end of file), we break qemu-iotests ./check
    -qcow2 022. This happens because qcow2 temporarily sets ->growable = 1
    for vmstate accesses (which are stored beyond the end of regular image
    data).
    
    We introduce the bs->zero_beyond_eof to allow qcow2_load_vmstate() to
    disable ->zero_beyond_eof temporarily in addition to enable ->growable.
    
    [Since the broken patch "block: Produce zeros when protocols reading
    beyond end of file" has not been merged yet, I have applied this fix
    *first* and will then apply the next patch to keep the tree bisectable.
    -- Stefan]
    Suggested-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
    Signed-off-by: default avatarAsias He <asias@redhat.com>
    Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
    0d51b4de
block.c 127 KB