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qemu: Unite error handling in qemuMigrationRun

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Merge cancel and cancelPostCopy sections with the generic error section,
where we can easily decide whether canceling the ongoing migration is
required.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
This commit is contained in:
Jiri Denemark 2017-10-19 14:15:46 +02:00
parent c1a643b68f
commit 7d2fbabcaf
1 changed files with 25 additions and 34 deletions
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59
src/qemu/qemu_migration.c
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@ -3621,7 +3621,7 @@ qemuMigrationRun(virQEMUDriverPtr driver,
unsigned int cookieFlags = 0;
bool abort_on_error = !!(flags & VIR_MIGRATE_ABORT_ON_ERROR);
bool events = virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_MIGRATION_EVENT);
bool inPostCopy = false;
bool cancel = false;
unsigned int waitFlags;
virDomainDefPtr persistDef = NULL;
char *timestamp;
@ -3827,10 +3827,11 @@ qemuMigrationRun(virQEMUDriverPtr driver,
/* From this point onwards we *must* call cancel to abort the
* migration on source if anything goes wrong */
cancel = true;
if (spec->fwdType != MIGRATION_FWD_DIRECT) {
if (!(iothread = qemuMigrationStartTunnel(spec->fwd.stream, fd)))
goto cancel;
goto error;
/* If we've created a tunnel, then the 'fd' will be closed in the
* qemuMigrationIOFunc as data->sock.
*/
@ -3848,13 +3849,13 @@ qemuMigrationRun(virQEMUDriverPtr driver,
rc = qemuMigrationWaitForCompletion(driver, vm,
QEMU_ASYNC_JOB_MIGRATION_OUT,
dconn, waitFlags);
if (rc == -2)
goto cancel;
else if (rc == -1)
if (rc == -2) {
goto error;
if (priv->job.current->status == QEMU_DOMAIN_JOB_STATUS_POSTCOPY)
inPostCopy = true;
} else if (rc == -1) {
/* QEMU reported failed migration, nothing to cancel anymore */
cancel = false;
goto error;
}
/* When migration completed, QEMU will have paused the CPUs for us.
* Wait for the STOP event to be processed or explicitly stop CPUs
@ -3866,25 +3867,25 @@ qemuMigrationRun(virQEMUDriverPtr driver,
rc = virDomainObjWait(vm);
priv->signalStop = false;
if (rc < 0)
goto cancelPostCopy;
goto error;
}
} else if (virDomainObjGetState(vm, NULL) == VIR_DOMAIN_RUNNING &&
qemuMigrationSetOffline(driver, vm) < 0) {
goto cancelPostCopy;
goto error;
}
if (mig && mig->nbd &&
qemuMigrationCancelDriveMirror(driver, vm, true,
QEMU_ASYNC_JOB_MIGRATION_OUT,
dconn) < 0)
goto cancelPostCopy;
goto error;
if (iothread) {
qemuMigrationIOThreadPtr io;
VIR_STEAL_PTR(io, iothread);
if (qemuMigrationStopTunnel(io, false) < 0)
goto cancelPostCopy;
goto error;
}
if (priv->job.completed) {
@ -3924,8 +3925,16 @@ qemuMigrationRun(virQEMUDriverPtr driver,
return ret;
error:
if (!orig_err)
orig_err = virSaveLastError();
orig_err = virSaveLastError();
if (cancel &&
priv->job.current->status != QEMU_DOMAIN_JOB_STATUS_QEMU_COMPLETED &&
virDomainObjIsActive(vm) &&
qemuDomainObjEnterMonitorAsync(driver, vm,
QEMU_ASYNC_JOB_MIGRATION_OUT) == 0) {
qemuMonitorMigrateCancel(priv->mon);
ignore_value(qemuDomainObjExitMonitor(driver, vm));
}
/* cancel any outstanding NBD jobs */
if (mig && mig->nbd)
@ -3937,7 +3946,8 @@ qemuMigrationRun(virQEMUDriverPtr driver,
qemuMigrationStopTunnel(iothread, true);
if (priv->job.current->status == QEMU_DOMAIN_JOB_STATUS_ACTIVE ||
priv->job.current->status == QEMU_DOMAIN_JOB_STATUS_MIGRATING)
priv->job.current->status == QEMU_DOMAIN_JOB_STATUS_MIGRATING ||
priv->job.current->status == QEMU_DOMAIN_JOB_STATUS_POSTCOPY)
priv->job.current->status = QEMU_DOMAIN_JOB_STATUS_FAILED;
goto cleanup;
@ -3945,25 +3955,6 @@ qemuMigrationRun(virQEMUDriverPtr driver,
exit_monitor:
ignore_value(qemuDomainObjExitMonitor(driver, vm));
goto error;
cancel:
orig_err = virSaveLastError();
if (virDomainObjIsActive(vm)) {
if (qemuDomainObjEnterMonitorAsync(driver, vm,
QEMU_ASYNC_JOB_MIGRATION_OUT) == 0) {
qemuMonitorMigrateCancel(priv->mon);
ignore_value(qemuDomainObjExitMonitor(driver, vm));
}
}
goto error;
cancelPostCopy:
priv->job.current->status = QEMU_DOMAIN_JOB_STATUS_FAILED;
if (inPostCopy)
goto cancel;
else
goto error;
}
/* Perform migration using QEMU's native migrate support,