diff options
| author | Asias He <asias@redhat.com> | 2013-08-22 15:24:14 +0800 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2013-08-22 14:10:21 +0200 |
| commit | 0d51b4debee6fb322751a57097a1d675c7a7c38d (patch) | |
| tree | b72339a0fbb9c363436a9e625e01250204e3dc15 /include/block | |
| parent | 8ad1898cf1f5314731123afce057e5cf74fd2f01 (diff) | |
block: Introduce bs->zero_beyond_eof
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: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'include/block')
| -rw-r--r-- | include/block/block_int.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/block/block_int.h b/include/block/block_int.h index e45f2a0d56..74b06899d5 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -281,6 +281,9 @@ struct BlockDriverState { /* Whether the disk can expand beyond total_sectors */ int growable; + /* Whether produces zeros when read beyond eof */ + bool zero_beyond_eof; + /* the memory alignment required for the buffers handled by this driver */ int buffer_alignment; |