diff options
| author | Pavel Dovgalyuk <pavel.dovgalyuk@ispras.ru> | 2020-10-03 20:13:02 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-10-06 08:34:49 +0200 |
| commit | bbacffc5f7a1a9318afe62f4eb20b3584acb6aa1 (patch) | |
| tree | afeda8bf70bf4cefa8609f80b9c9ce3f441c4034 /block/qcow2-snapshot.c | |
| parent | 56db1198a417838f17ffb7a7546c731deab02938 (diff) | |
qcow2: introduce icount field for snapshots
This patch introduces the icount field for saving within the snapshot.
It is required for navigation between the snapshots in record/replay mode.
Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgalyuk@ispras.ru>
Acked-by: Kevin Wolf <kwolf@redhat.com>
--
v7 changes:
- also fix the test which checks qcow2 snapshot extra data
Message-Id: <160174518284.12451.2301137308458777398.stgit@pasha-ThinkPad-X280>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'block/qcow2-snapshot.c')
| -rw-r--r-- | block/qcow2-snapshot.c | 7 |
1 files changed, 7 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); |