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authorAlberto Garcia <berto@igalia.com>2020-07-10 18:12:53 +0200
committerMax Reitz <mreitz@redhat.com>2020-08-25 08:33:20 +0200
commit3e71981592a9f9c52833887f5675b3154d23eec8 (patch)
tree42ef439eb172a3e6f1fe17857c7323894257d92c /block
parenta53e8b7202dd941c619a57a640389560214d1f70 (diff)
qcow2: Add offset_into_subcluster() and size_to_subclusters()
Like offset_into_cluster() and size_to_clusters(), but for subclusters. Signed-off-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-Id: <3cc2390dcdef3d234d47c741b708bd8734490862.1594396418.git.berto@igalia.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'block')
-rw-r--r--block/qcow2.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/block/qcow2.h b/block/qcow2.h
index 2503374677..4fe31adfd3 100644
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -555,11 +555,21 @@ static inline int64_t offset_into_cluster(BDRVQcow2State *s, int64_t offset)
return offset & (s->cluster_size - 1);
}
+static inline int64_t offset_into_subcluster(BDRVQcow2State *s, int64_t offset)
+{
+ return offset & (s->subcluster_size - 1);
+}
+
static inline uint64_t size_to_clusters(BDRVQcow2State *s, uint64_t size)
{
return (size + (s->cluster_size - 1)) >> s->cluster_bits;
}
+static inline uint64_t size_to_subclusters(BDRVQcow2State *s, uint64_t size)
+{
+ return (size + (s->subcluster_size - 1)) >> s->subcluster_bits;
+}
+
static inline int64_t size_to_l1(BDRVQcow2State *s, int64_t size)
{
int shift = s->cluster_bits + s->l2_bits;