bug reproduce process:
1、perform migrateToURI3.
2、kill libvirtd when enter memory migration phase，and restart libvirtd.
3、perform migrateToURI3 again and again，migrateToURI3 will fail forever with
err-msg "Requested operation is not valid: domain has active block job"
I found the reasion which trigger the bug as follow:
1、the qemuBlockJobData is not persistent when libvirtd restart，so the job which
return from qemuBlockJobDiskGetJob while always NULL, so
qemuMigrationSrcNBDCopyCancel will not be taken.
2、calltrace:
qemuProcessReconnect
->qemuProcessRecoverJob
->qemuProcessRecoverMigrationOut
->qemuMigrationSrcCancel
3、code as follow:
qemuMigrationSrcCancel(virQEMUDriver *driver,
virDomainObj *vm)
{
... ...
for (i = 0; i < vm->def->ndisks; i++) {
virDomainDiskDef *disk = vm->def->disks[i];
qemuDomainDiskPrivate *diskPriv = QEMU_DOMAIN_DISK_PRIVATE(disk);
qemuBlockJobData *job;
if (!(job = qemuBlockJobDiskGetJob(disk)) || //the job is
always NULL !!!
!qemuBlockJobIsRunning(job))
diskPriv->migrating = false;
if (diskPriv->migrating) {
qemuBlockJobSyncBegin(job);
storage = true;
}
virObjectUnref(job);
}
... ...
if (storage &&
qemuMigrationSrcNBDCopyCancel(driver, vm, true,
QEMU_ASYNC_JOB_NONE, NULL) < 0)
return -1;
... ...
}
4、I think current master had lost the ability of the followed patch:
http://10.175.124.40/cgit/cgit.cgi/code.huawei.com/libvirt.git/commit/?id=e8f263e0d006390c3764aaa07093b2d174b61379
can you give some suggestions to fix it?
