diff options
| author | Pavel Dovgalyuk <pavel.dovgalyuk@ispras.ru> | 2020-10-03 20:13:08 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-10-06 08:34:49 +0200 |
| commit | b39847a50553b7679d6d7fefbe6a108a17aacf8d (patch) | |
| tree | 6e7110a7373d6668f7134c9e7658c8ca790616db /block/qcow2-snapshot.c | |
| parent | bbacffc5f7a1a9318afe62f4eb20b3584acb6aa1 (diff) | |
migration: introduce icount field for snapshots
Saving icount as a parameters of the snapshot allows navigation between
them in the execution replay scenario.
This information can be used for finding a specific snapshot for proceeding
the recorded execution to the specific moment of the time.
E.g., 'reverse step' action (introduced in one of the following patches)
needs to load the nearest snapshot which is prior to the current moment
of time.
This patch also updates snapshot test which verifies qemu monitor output.
Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgalyuk@ispras.ru>
Acked-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Kevin Wolf <kwolf@redhat.com>
--
v4 changes:
- squashed format update with test output update
v7 changes:
- introduced the spaces between the fields in snapshot info output
- updated the test to match new field widths
Message-Id: <160174518865.12451.14327573383978752463.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 | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/block/qcow2-snapshot.c b/block/qcow2-snapshot.c index d68b25e0c5..2e98c7f4b6 100644 --- a/block/qcow2-snapshot.c +++ b/block/qcow2-snapshot.c @@ -663,6 +663,7 @@ int qcow2_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info) sn->date_sec = sn_info->date_sec; sn->date_nsec = sn_info->date_nsec; sn->vm_clock_nsec = sn_info->vm_clock_nsec; + sn->icount = sn_info->icount; sn->extra_data_size = sizeof(QCowSnapshotExtraData); /* Allocate the L1 table of the snapshot and copy the current one there. */ @@ -1007,6 +1008,7 @@ int qcow2_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo **psn_tab) sn_info->date_sec = sn->date_sec; sn_info->date_nsec = sn->date_nsec; sn_info->vm_clock_nsec = sn->vm_clock_nsec; + sn_info->icount = sn->icount; } *psn_tab = sn_tab; return s->nb_snapshots; |