diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/qcow2.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/block/qcow2.h b/block/qcow2.h index 46b351229a..82b86f6cec 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -533,15 +533,36 @@ static inline size_t l2_entry_size(BDRVQcow2State *s) static inline uint64_t get_l2_entry(BDRVQcow2State *s, uint64_t *l2_slice, int idx) { + idx *= l2_entry_size(s) / sizeof(uint64_t); return be64_to_cpu(l2_slice[idx]); } +static inline uint64_t get_l2_bitmap(BDRVQcow2State *s, uint64_t *l2_slice, + int idx) +{ + if (has_subclusters(s)) { + idx *= l2_entry_size(s) / sizeof(uint64_t); + return be64_to_cpu(l2_slice[idx + 1]); + } else { + return 0; /* For convenience only; this value has no meaning. */ + } +} + static inline void set_l2_entry(BDRVQcow2State *s, uint64_t *l2_slice, int idx, uint64_t entry) { + idx *= l2_entry_size(s) / sizeof(uint64_t); l2_slice[idx] = cpu_to_be64(entry); } +static inline void set_l2_bitmap(BDRVQcow2State *s, uint64_t *l2_slice, + int idx, uint64_t bitmap) +{ + assert(has_subclusters(s)); + idx *= l2_entry_size(s) / sizeof(uint64_t); + l2_slice[idx + 1] = cpu_to_be64(bitmap); +} + static inline bool has_data_file(BlockDriverState *bs) { BDRVQcow2State *s = bs->opaque; |