diff options
Diffstat (limited to 'block/qcow2-cluster.c')
| -rw-r--r-- | block/qcow2-cluster.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index 98fba71fd7..d7e0e19d9c 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -947,8 +947,16 @@ again: /* save info needed for meta data update */ if (nb_clusters > 0) { + /* + * requested_sectors: Number of sectors from the start of the first + * newly allocated cluster to the end of the (possibly shortened + * before) write request. + * + * avail_sectors: Number of sectors from the start of the first + * newly allocated to the end of the last newly allocated cluster. + */ int requested_sectors = n_end - keep_clusters * s->cluster_sectors; - int avail_sectors = (keep_clusters + nb_clusters) + int avail_sectors = nb_clusters << (s->cluster_bits - BDRV_SECTOR_BITS); *m = (QCowL2Meta) { |