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migration: control whether snapshots are ovewritten

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The traditional HMP "savevm" command will overwrite an existing snapshot
if it already exists with the requested name. This new flag allows this
to be controlled allowing for safer behaviour with a future QMP command.

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20210204124834.774401-8-berrange@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Daniel P. Berrangé
2021-02-04 12:48:29 +00:00
committed by Dr. David Alan Gilbert
parent 3d3e9b1f66
commit f781f84189
5 changed files with 21 additions and 7 deletions
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2
replay/replay-debugging.c
View File

@ -327,7 +327,7 @@ void replay_gdb_attached(void)
*/
if (replay_mode == REPLAY_MODE_PLAY
&& !replay_snapshot) {
if (!save_snapshot("start_debugging", NULL)) {
if (!save_snapshot("start_debugging", true, NULL)) {
/* Can't create the snapshot. Continue conventional debugging. */
}
}

2
replay/replay-snapshot.c
View File

@ -77,7 +77,7 @@ void replay_vmstate_init(void)
if (replay_snapshot) {
if (replay_mode == REPLAY_MODE_RECORD) {
if (!save_snapshot(replay_snapshot, &err)) {
if (!save_snapshot(replay_snapshot, true, &err)) {
error_report_err(err);
error_report("Could not create snapshot for icount record");
exit(1);