Re: [libvirt] [PATCH] qemu: Check QEMU error on failed migration

When migration fails, QEMU may provide a description of the error in the reply to query-migrate QMP command. We can fetch this error and use it instead of the generic "unexpectedly failed" message. Signed-off-by: Jiri Denemark <jdenemar(a)redhat.com&gt; --- src/qemu/qemu_driver.c | 3 ++- src/qemu/qemu_migration.c | 36 +++++++++++++++++++++++------------- src/qemu/qemu_migration.h | 3 ++- src/qemu/qemu_monitor.c | 8 ++++++-- src/qemu/qemu_monitor.h | 3 ++- src/qemu/qemu_monitor_json.c | 18 ++++++++++++++---- src/qemu/qemu_monitor_json.h | 3 ++- tests/qemumonitorjsontest.c | 29 ++++++++++++++++++++++++++--- 8 files changed, 77 insertions(+), 26 deletions(-)

diff --git a/tests/qemumonitorjsontest.c b/tests/qemumonitorjsontest.c index df3ef0a932..475fd270e1 100644 --- a/tests/qemumonitorjsontest.c +++ b/tests/qemumonitorjsontest.c @@ -1907,6 +1907,7 @@ testQemuMonitorJSONqemuMonitorJSONGetMigrationStats(const void *data) qemuMonitorTestPtr test = qemuMonitorTestNewSimple(true, xmlopt); int ret = -1; qemuMonitorMigrationStats stats, expectedStats; + char *error = NULL; if (!test) return -1; @@ -1931,21 +1932,43 @@ testQemuMonitorJSONqemuMonitorJSONGetMigrationStats(const void *data) " }" " }," " \"id\": \"libvirt-13\"" + "}") < 0 || + qemuMonitorTestAddItem(test, "query-migrate", + "{" + " \"return\": {" + " \"status\": \"failed\"," + " \"error-desc\": \"It's broken\"" + " }," + " \"id\": \"libvirt-14\"" "}") < 0) goto cleanup; - if (qemuMonitorJSONGetMigrationStats(qemuMonitorTestGetMonitor(test), &stats) < 0) + if (qemuMonitorJSONGetMigrationStats(qemuMonitorTestGetMonitor(test), + &stats, &error) < 0) goto cleanup; - if (memcmp(&stats, &expectedStats, sizeof(stats)) != 0) { + if (memcmp(&stats, &expectedStats, sizeof(stats)) != 0 || error) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", - "Invalid migration status"); + "Invalid migration statistics"); + goto cleanup; + }

+ + memset(&stats, 0, sizeof(stats)); + if (qemuMonitorJSONGetMigrationStats(qemuMonitorTestGetMonitor(test), + &stats, &error) < 0) + goto cleanup; + + if (stats.status != QEMU_MONITOR_MIGRATION_STATUS_ERROR || + STRNEQ_NULLABLE(error, "It's broken")) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + "Invalid failed migration status"); goto cleanup; } ret = 0; cleanup: qemuMonitorTestFree(test); + VIR_FREE(error); return ret; }