1 files changed, 29 insertions, 0 deletions
diff --git a/block/qcow2.h b/block/qcow2.h
index e4b5e11a91..bf8db2abd3 100644
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -250,6 +250,9 @@ typedef struct QCowL2Meta
      */
     Qcow2COWRegion cow_end;
 
+    /** Pointer to next L2Meta of the same write request */
+    struct QCowL2Meta *next;
+
     QLIST_ENTRY(QCowL2Meta) next_in_flight;
 } QCowL2Meta;
 
@@ -266,6 +269,16 @@ enum {
 
 #define REFT_OFFSET_MASK 0xffffffffffffff00ULL
 
+static inline int64_t start_of_cluster(BDRVQcowState *s, int64_t offset)
+{
+    return offset & ~(s->cluster_size - 1);
+}
+
+static inline int64_t offset_into_cluster(BDRVQcowState *s, int64_t offset)
+{
+    return offset & (s->cluster_size - 1);
+}
+
 static inline int size_to_clusters(BDRVQcowState *s, int64_t size)
 {
     return (size + (s->cluster_size - 1)) >> s->cluster_bits;
@@ -277,6 +290,11 @@ static inline int size_to_l1(BDRVQcowState *s, int64_t size)
     return (size + (1ULL << shift) - 1) >> shift;
 }
 
+static inline int offset_to_l2_index(BDRVQcowState *s, int64_t offset)
+{
+    return (offset >> s->cluster_bits) & (s->l2_size - 1);
+}
+
 static inline int64_t align_offset(int64_t offset, int n)
 {
     offset = (offset + n - 1) & ~(n - 1);
@@ -302,6 +320,17 @@ static inline bool qcow2_need_accurate_refcounts(BDRVQcowState *s)
     return !(s->incompatible_features & QCOW2_INCOMPAT_DIRTY);
 }
 
+static inline uint64_t l2meta_cow_start(QCowL2Meta *m)
+{
+    return m->offset + m->cow_start.offset;
+}
+
+static inline uint64_t l2meta_cow_end(QCowL2Meta *m)
+{
+    return m->offset + m->cow_end.offset
+        + (m->cow_end.nb_sectors << BDRV_SECTOR_BITS);
+}
+
 // FIXME Need qcow2_ prefix to global functions
 
 /* qcow2.c functions */