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Add a hint message to loadvm and exits on failure

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This patch adds a small hint for the failure case of the load snapshot
process. It may be useful for users to remember that the VM
configuration has changed between the save and load processes.

(qemu) loadvm vm-20180903083641
Unknown savevm section or instance 'cpu_common' 4.
Make sure that your current VM setup matches your saved VM setup, including any hotplugged devices
Error -22 while loading VM state
(qemu) device_add host-spapr-cpu-core,core-id=4
(qemu) loadvm vm-20180903083641
(qemu) c
(qemu) info status
VM status: running

It also exits Qemu if the snapshot cannot be loaded before reaching the
main loop (-loadvm in the command line).

$ qemu-system-ppc64 ... -loadvm vm-20180903083641
qemu-system-ppc64: Unknown savevm section or instance 'cpu_common' 4.
Make sure that your current VM setup matches your saved VM setup, including any hotplugged devices
qemu-system-ppc64: Error -22 while loading VM state
$

Signed-off-by: Jose Ricardo Ziviani <joserz@linux.ibm.com>
Message-Id: <20180903162613.15877-1-joserz@linux.ibm.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Jose Ricardo Ziviani 2018-09-03 13:26:13 -03:00 committed by Dr. David Alan Gilbert
parent e8f3735fa3
commit 827beacb47
2 changed files with 4 additions and 1 deletions
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4
migration/savevm.c
View File

@ -2078,7 +2078,9 @@ qemu_loadvm_section_start_full(QEMUFile *f, MigrationIncomingState *mis)
/* Find savevm section */
se = find_se(idstr, instance_id);
if (se == NULL) {
error_report("Unknown savevm section or instance '%s' %d",
error_report("Unknown savevm section or instance '%s' %d. "
"Make sure that your current VM setup matches your "
"saved VM setup, including any hotplugged devices",
idstr, instance_id);
return -EINVAL;
}

1
vl.c
View File

@ -4530,6 +4530,7 @@ int main(int argc, char **argv, char **envp)
if (load_snapshot(loadvm, &local_err) < 0) {
error_report_err(local_err);
autostart = 0;
exit(1);
}
}