[libvirt] [PATCH 19/20] Consolidate "cont" into qemudMonitorSendCont()
Miloslav Trmač
mitr at redhat.com
Tue Aug 4 20:28:34 UTC 2009
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.
Changes since the first submission:
- Suport reporting errors that are not overridden by callers.
---
src/qemu_driver.c | 78 +++++++++++++++++++++++++++++++---------------------
1 files changed, 46 insertions(+), 32 deletions(-)
diff --git a/src/qemu_driver.c b/src/qemu_driver.c
index 7a2e581..d654651 100644
--- a/src/qemu_driver.c
+++ b/src/qemu_driver.c
@@ -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>
@@ -135,6 +136,9 @@ static int qemudMonitorCommandExtra(const virDomainObjPtr vm,
const char *extraPrompt,
int scm_fd,
char **reply);
+static int qemudMonitorSendCont(virConnectPtr conn,
+ const virDomainObjPtr vm,
+ bool *error_reported);
static int qemudDomainSetMemoryBalloon(virConnectPtr conn,
virDomainObjPtr vm,
unsigned long newmem);
@@ -1225,7 +1229,6 @@ 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;
@@ -1260,13 +1263,15 @@ qemudInitCpus(virConnectPtr conn,
#endif /* HAVE_SCHED_GETAFFINITY */
if (migrateFrom == NULL) {
+ bool error_reported;
+
/* 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, &error_reported) < 0) {
+ if (!error_reported)
+ qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
+ "%s", _("resume operation failed"));
return -1;
}
- VIR_FREE(info);
}
return 0;
@@ -2457,6 +2462,20 @@ qemudMonitorCommand(const virDomainObjPtr vm,
return qemudMonitorCommandWithFd(vm, cmd, -1, reply);
}
+static int
+qemudMonitorSendCont(virConnectPtr conn ATTRIBUTE_UNUSED,
+ const virDomainObjPtr vm,
+ bool *error_reported) {
+ char *reply;
+
+ *error_reported = false;
+ 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) {
@@ -2941,7 +2960,6 @@ cleanup:
static int qemudDomainResume(virDomainPtr dom) {
struct qemud_driver *driver = dom->conn->privateData;
- char *info;
virDomainObjPtr vm;
int ret = -1;
virDomainEventPtr event = NULL;
@@ -2962,17 +2980,18 @@ 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"));
+ bool error_reported;
+
+ if (qemudMonitorSendCont(dom->conn, vm, &error_reported) < 0) {
+ if (!error_reported)
+ 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;
@@ -3663,13 +3682,13 @@ 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;
+ bool error_reported;
+
+ if (qemudMonitorSendCont(dom->conn, vm, &error_reported) < 0) {
+ if (!error_reported)
+ 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);
@@ -4147,13 +4166,14 @@ 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"));
+ bool error_reported;
+
+ if (qemudMonitorSendCont(conn, vm, &error_reported) < 0) {
+ if (!error_reported)
+ qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED,
+ "%s", _("failed to resume domain"));
goto cleanup;
}
- VIR_FREE(info);
vm->state = VIR_DOMAIN_RUNNING;
}
ret = 0;
@@ -6591,14 +6611,11 @@ 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) {
+ bool error_reported;
+
/* we got here through some sort of failure; start the domain again */
- if (qemudMonitorCommand (vm, "cont", &info) < 0) {
+ if (qemudMonitorSendCont(dom->conn, vm, &error_reported) < 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
@@ -6606,16 +6623,13 @@ 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)
--
1.6.2.5
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