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| author | Kevin Wolf <kwolf@redhat.com> | 2012-02-23 15:40:55 +0100 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2012-04-20 15:57:28 +0200 |
| commit | 8e37f681d58bbe166c20559e77fd55b1cb8e6e4b (patch) | |
| tree | 5c98c646b56e21ac9f04b26a6248ee93331d313b /block/qcow2-refcount.c | |
| parent | b0b6862e5e1a1394e0ab3d5da94ba8b0da8664e2 (diff) | |
| download | qemu-8e37f681d58bbe166c20559e77fd55b1cb8e6e4b.tar.gz | |
qcow2: Ignore reserved bits in L1/L2 entries
This changes the still existing places that assume that the only flags
are QCOW_OFLAG_COPIED and QCOW_OFLAG_COMPRESSED to properly mask out
reserved bits.
It does not convert bdrv_check yet.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block/qcow2-refcount.c')
| -rw-r--r-- | block/qcow2-refcount.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c index 6c383373de..84fa343248 100644 --- a/block/qcow2-refcount.c +++ b/block/qcow2-refcount.c @@ -702,9 +702,8 @@ void qcow2_free_any_clusters(BlockDriverState *bs, return; } - qcow2_free_clusters(bs, cluster_offset, nb_clusters << s->cluster_bits); - - return; + qcow2_free_clusters(bs, cluster_offset & L2E_OFFSET_MASK, + nb_clusters << s->cluster_bits); } @@ -764,7 +763,7 @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs, l2_offset = l1_table[i]; if (l2_offset) { old_l2_offset = l2_offset; - l2_offset &= ~QCOW_OFLAG_COPIED; + l2_offset &= L1E_OFFSET_MASK; ret = qcow2_cache_get(bs, s->l2_table_cache, l2_offset, (void**) &l2_table); @@ -796,10 +795,11 @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs, /* compressed clusters are never modified */ refcount = 2; } else { + uint64_t cluster_index = (offset & L2E_OFFSET_MASK) >> s->cluster_bits; if (addend != 0) { - refcount = update_cluster_refcount(bs, offset >> s->cluster_bits, addend); + refcount = update_cluster_refcount(bs, cluster_index, addend); } else { - refcount = get_refcount(bs, offset >> s->cluster_bits); + refcount = get_refcount(bs, cluster_index); } if (refcount < 0) { |