diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/qcow2-snapshot.c | 7 | ||||
| -rw-r--r-- | block/qcow2.h | 3 |
2 files changed, 10 insertions, 0 deletions
diff --git a/block/qcow2-snapshot.c b/block/qcow2-snapshot.c index 9b68690f56..d68b25e0c5 100644 --- a/block/qcow2-snapshot.c +++ b/block/qcow2-snapshot.c @@ -164,6 +164,12 @@ static int qcow2_do_read_snapshots(BlockDriverState *bs, bool repair, sn->disk_size = bs->total_sectors * BDRV_SECTOR_SIZE; } + if (sn->extra_data_size >= endof(QCowSnapshotExtraData, icount)) { + sn->icount = be64_to_cpu(extra.icount); + } else { + sn->icount = -1ULL; + } + if (sn->extra_data_size > sizeof(extra)) { uint64_t extra_data_end; size_t unknown_extra_data_size; @@ -333,6 +339,7 @@ int qcow2_write_snapshots(BlockDriverState *bs) memset(&extra, 0, sizeof(extra)); extra.vm_state_size_large = cpu_to_be64(sn->vm_state_size); extra.disk_size = cpu_to_be64(sn->disk_size); + extra.icount = cpu_to_be64(sn->icount); id_str_size = strlen(sn->id_str); name_size = strlen(sn->name); diff --git a/block/qcow2.h b/block/qcow2.h index b71e444fca..125ea9679b 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -206,6 +206,7 @@ typedef struct QEMU_PACKED QCowSnapshotHeader { typedef struct QEMU_PACKED QCowSnapshotExtraData { uint64_t vm_state_size_large; uint64_t disk_size; + uint64_t icount; } QCowSnapshotExtraData; @@ -219,6 +220,8 @@ typedef struct QCowSnapshot { uint32_t date_sec; uint32_t date_nsec; uint64_t vm_clock_nsec; + /* icount value for the moment when snapshot was taken */ + uint64_t icount; /* Size of all extra data, including QCowSnapshotExtraData if available */ uint32_t extra_data_size; /* Data beyond QCowSnapshotExtraData, if any */ |