diff options
| author | Kevin Wolf <kwolf@redhat.com> | 2012-03-16 15:02:38 +0100 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2012-04-20 15:57:29 +0200 |
| commit | 6377af48b0445e7ee50db6e0bd73a3a70098f5f4 (patch) | |
| tree | e3b5171b5645490af6a392662790d7de88247a69 /block/qcow2-refcount.c | |
| parent | 6744cbab8cd63b7ce72b3eee4f0055007acf0798 (diff) | |
qcow2: Support reading zero clusters
This adds support for reading zero clusters in version 3 images.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block/qcow2-refcount.c')
| -rw-r--r-- | block/qcow2-refcount.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c index 0112cc37b0..812c93c5c7 100644 --- a/block/qcow2-refcount.c +++ b/block/qcow2-refcount.c @@ -703,6 +703,7 @@ void qcow2_free_any_clusters(BlockDriverState *bs, nb_clusters << s->cluster_bits); break; case QCOW2_CLUSTER_UNALLOCATED: + case QCOW2_CLUSTER_ZERO: break; default: abort(); @@ -973,6 +974,12 @@ static int check_refcounts_l2(BlockDriverState *bs, BdrvCheckResult *res, l2_entry & ~511, nb_csectors * 512); break; + case QCOW2_CLUSTER_ZERO: + if ((l2_entry & L2E_OFFSET_MASK) == 0) { + break; + } + /* fall through */ + case QCOW2_CLUSTER_NORMAL: { /* QCOW_OFLAG_COPIED must be set iff refcount == 1 */ |