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Consolidate "cont" into qemudMonitorSendCont() 

The interface allows qemudMonitorSendCont() to report errors that are
not overridden by its callers.

Also fix a potential infinite loop in qemuDomainCoreDump() if sending
cont repeatedly fails.

* src/qemu_driver.c (qemudMonitorSendCont): New function.
  (qemudAutostartConfigs): Reset error before each call to
  qemudStartVMDaemon().
  (qemudInitCpus, qemudDomainResume, qemudDomainCoreDump,
  qemudDomainRestore, qemudDomainMigratePerform,
  qemudDomainMigrateFinish2): Use qemudMonitorSendCont().
This commit is contained in:
Miloslav Trmač 2009-07-21 11:53:17 +02:00 committed by Daniel P. Berrange
parent 78811ae572
commit 7ec20935bd
1 changed files with 41 additions and 38 deletions
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79
src/qemu_driver.c
View File

@ -28,6 +28,7 @@
#include <dirent.h>
#include <limits.h>
#include <string.h>
#include <stdbool.h>
#include <stdio.h>
#include <strings.h>
#include <stdarg.h>
@ -133,6 +134,8 @@ static int qemudMonitorCommandExtra(const virDomainObjPtr vm,
const char *extraPrompt,
int scm_fd,
char **reply);
static int qemudMonitorSendCont(virConnectPtr conn,
const virDomainObjPtr vm);
static int qemudDomainSetMemoryBalloon(virConnectPtr conn,
virDomainObjPtr vm,
unsigned long newmem);
@ -248,7 +251,10 @@ qemudAutostartConfigs(struct qemud_driver *driver) {
virDomainObjLock(vm);
if (vm->autostart &&
!virDomainIsActive(vm)) {
int ret = qemudStartVMDaemon(conn, driver, vm, NULL, -1);
int ret;
virResetLastError();
ret = qemudStartVMDaemon(conn, driver, vm, NULL, -1);
if (ret < 0) {
virErrorPtr err = virGetLastError();
VIR_ERROR(_("Failed to autostart VM '%s': %s\n"),
@ -1310,7 +1316,6 @@ static int
qemudInitCpus(virConnectPtr conn,
virDomainObjPtr vm,
const char *migrateFrom) {
char *info = NULL;
#if HAVE_SCHED_GETAFFINITY
cpu_set_t mask;
int i, maxcpu = QEMUD_CPUMASK_LEN;
@ -1346,12 +1351,12 @@ qemudInitCpus(virConnectPtr conn,
if (migrateFrom == NULL) {
/* Allow the CPUS to start executing */
if (qemudMonitorCommand(vm, "cont", &info) < 0) {
qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"%s", _("resume operation failed"));
if (qemudMonitorSendCont(conn, vm) < 0) {
if (virGetLastError() == NULL)
qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"%s", _("resume operation failed"));
return -1;
}
VIR_FREE(info);
}
return 0;
@ -2657,6 +2662,18 @@ qemudMonitorCommand(const virDomainObjPtr vm,
return qemudMonitorCommandWithFd(vm, cmd, -1, reply);
}
static int
qemudMonitorSendCont(virConnectPtr conn ATTRIBUTE_UNUSED,
const virDomainObjPtr vm) {
char *reply;
if (qemudMonitorCommand(vm, "cont", &reply) < 0)
return -1;
qemudDebug ("%s: cont reply: %s", vm->def->name, info);
VIR_FREE(reply);
return 0;
}
static virDrvOpenStatus qemudOpen(virConnectPtr conn,
virConnectAuthPtr auth ATTRIBUTE_UNUSED,
int flags ATTRIBUTE_UNUSED) {
@ -3142,7 +3159,6 @@ cleanup:
static int qemudDomainResume(virDomainPtr dom) {
struct qemud_driver *driver = dom->conn->privateData;
char *info;
virDomainObjPtr vm;
int ret = -1;
virDomainEventPtr event = NULL;
@ -3163,17 +3179,16 @@ static int qemudDomainResume(virDomainPtr dom) {
goto cleanup;
}
if (vm->state == VIR_DOMAIN_PAUSED) {
if (qemudMonitorCommand(vm, "cont", &info) < 0) {
qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED,
"%s", _("resume operation failed"));
if (qemudMonitorSendCont(dom->conn, vm) < 0) {
if (virGetLastError() == NULL)
qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED,
"%s", _("resume operation failed"));
goto cleanup;
}
vm->state = VIR_DOMAIN_RUNNING;
qemudDebug("Reply %s", info);
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_RESUMED,
VIR_DOMAIN_EVENT_RESUMED_UNPAUSED);
VIR_FREE(info);
}
if (virDomainSaveStatus(dom->conn, driver->stateDir, vm) < 0)
goto cleanup;
@ -3915,13 +3930,11 @@ cleanup:
will support synchronous operations so we always get here after
the migration is complete. */
if (resume && paused) {
if (qemudMonitorCommand(vm, "cont", &info) < 0) {
qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED,
"%s", _("resuming after dump failed"));
goto cleanup;
if (qemudMonitorSendCont(dom->conn, vm) < 0) {
if (virGetLastError() == NULL)
qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED,
"%s", _("resuming after dump failed"));
}
DEBUG ("%s: cont reply: %s", vm->def->name, info);
VIR_FREE(info);
}
if (vm)
virDomainObjUnlock(vm);
@ -4433,13 +4446,12 @@ static int qemudDomainRestore(virConnectPtr conn,
/* If it was running before, resume it now. */
if (header.was_running) {
char *info;
if (qemudMonitorCommand(vm, "cont", &info) < 0) {
qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED,
"%s", _("failed to resume domain"));
if (qemudMonitorSendCont(conn, vm) < 0) {
if (virGetLastError() == NULL)
qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED,
"%s", _("failed to resume domain"));
goto cleanup;
}
VIR_FREE(info);
vm->state = VIR_DOMAIN_RUNNING;
virDomainSaveStatus(conn, driver->stateDir, vm);
}
@ -7155,14 +7167,9 @@ qemudDomainMigratePerform (virDomainPtr dom,
ret = 0;
cleanup:
/* Note that we have to free info *first*, since we are re-using the
* variable below (and otherwise might cause a memory leak)
*/
VIR_FREE(info);
if (paused) {
/* we got here through some sort of failure; start the domain again */
if (qemudMonitorCommand (vm, "cont", &info) < 0) {
if (qemudMonitorSendCont(dom->conn, vm) < 0) {
/* Hm, we already know we are in error here. We don't want to
* overwrite the previous error, though, so we just throw something
* to the logs and hope for the best
@ -7170,16 +7177,13 @@ cleanup:
VIR_ERROR(_("Failed to resume guest %s after failure\n"),
vm->def->name);
}
else {
DEBUG ("%s: cont reply: %s", vm->def->name, info);
VIR_FREE(info);
}
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_RESUMED,
VIR_DOMAIN_EVENT_RESUMED_MIGRATED);
}
VIR_FREE(info);
if (vm)
virDomainObjUnlock(vm);
if (event)
@ -7202,7 +7206,6 @@ qemudDomainMigrateFinish2 (virConnectPtr dconn,
virDomainObjPtr vm;
virDomainPtr dom = NULL;
virDomainEventPtr event = NULL;
char *info = NULL;
qemuDriverLock(driver);
vm = virDomainFindByName(&driver->domains, dname);
@ -7222,12 +7225,12 @@ qemudDomainMigrateFinish2 (virConnectPtr dconn,
* >= 0.10.6 to work properly. This isn't strictly necessary on
* older qemu's, but it also doesn't hurt anything there
*/
if (qemudMonitorCommand(vm, "cont", &info) < 0) {
qemudReportError(dconn, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"%s", _("resume operation failed"));
if (qemudMonitorSendCont(dconn, vm) < 0) {
if (virGetLastError() == NULL)
qemudReportError(dconn, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"%s", _("resume operation failed"));
goto cleanup;
}
VIR_FREE(info);
vm->state = VIR_DOMAIN_RUNNING;
event = virDomainEventNewFromObj(vm,