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qemuDomainGetStats: Convert worker functions to void

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The presence of a return value made it seem that it's expected to fail
on errors which is not the case. The function is designed to skip
anything it can't fill and not fail when fetching individual stats.

Convert the workers to void to make it clear that it's expected not
to fail.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Peter Krempa 2025-02-17 14:33:31 +01:00
parent 4086f9ed5c
commit f0c9c34d58
1 changed files with 25 additions and 48 deletions
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73
src/qemu/qemu_driver.c
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@ -16556,7 +16556,7 @@ qemuConnectGetDomainCapabilities(virConnectPtr conn,
}
static int
static void
qemuDomainGetStatsState(virQEMUDriver *driver G_GNUC_UNUSED,
virDomainObj *dom,
virTypedParamList *params,
@ -16564,8 +16564,6 @@ qemuDomainGetStatsState(virQEMUDriver *driver G_GNUC_UNUSED,
{
virTypedParamListAddInt(params, dom->state.state, "state.state");
virTypedParamListAddInt(params, dom->state.reason, "state.reason");
return 0;
}
@ -16939,7 +16937,7 @@ qemuDomainGetStatsCpuHaltPollTime(virDomainObj *dom,
return;
}
static int
static void
qemuDomainGetStatsCpu(virQEMUDriver *driver,
virDomainObj *dom,
virTypedParamList *params,
@ -16956,12 +16954,10 @@ qemuDomainGetStatsCpu(virQEMUDriver *driver,
qemuDomainGetStatsCpuCache(driver, dom, params);
qemuDomainGetStatsCpuHaltPollTime(dom, params, privflags);
return 0;
}
static int
static void
qemuDomainGetStatsMemory(virQEMUDriver *driver,
virDomainObj *dom,
virTypedParamList *params,
@ -16969,11 +16965,10 @@ qemuDomainGetStatsMemory(virQEMUDriver *driver,
{
qemuDomainGetStatsMemoryBandwidth(driver, dom, params);
return 0;
}
static int
static void
qemuDomainGetStatsBalloon(virQEMUDriver *driver G_GNUC_UNUSED,
virDomainObj *dom,
virTypedParamList *params,
@ -16994,12 +16989,12 @@ qemuDomainGetStatsBalloon(virQEMUDriver *driver G_GNUC_UNUSED,
virTypedParamListAddULLong(params, virDomainDefGetMemoryTotal(dom->def), "balloon.maximum");
if (!HAVE_JOB(privflags) || !virDomainObjIsActive(dom))
return 0;
return;
nr_stats = qemuDomainMemoryStatsInternal(dom, stats,
VIR_DOMAIN_MEMORY_STAT_NR);
if (nr_stats < 0)
return 0;
return;
#define STORE_MEM_RECORD(TAG, NAME) \
if (stats[i].tag == VIR_DOMAIN_MEMORY_STAT_ ##TAG) \
@ -17021,8 +17016,6 @@ qemuDomainGetStatsBalloon(virQEMUDriver *driver G_GNUC_UNUSED,
}
#undef STORE_MEM_RECORD
return 0;
}
@ -17085,7 +17078,7 @@ qemuDomainAddStatsFromHashTable(GHashTable *stats,
}
static int
static void
qemuDomainGetStatsVcpu(virQEMUDriver *driver G_GNUC_UNUSED,
virDomainObj *dom,
virTypedParamList *params,
@ -17118,7 +17111,7 @@ qemuDomainGetStatsVcpu(virQEMUDriver *driver G_GNUC_UNUSED,
virDomainDefGetVcpus(dom->def),
NULL, 0) < 0) {
virResetLastError();
return 0;
return;
}
if (HAVE_JOB(privflags) && qemuDomainRefreshStatsSchema(dom) == 0) {
@ -17163,15 +17156,13 @@ qemuDomainGetStatsVcpu(virQEMUDriver *driver G_GNUC_UNUSED,
qemuDomainAddStatsFromHashTable(stats, priv->statsSchema, prefix, params);
}
return 0;
}
#define QEMU_ADD_NET_PARAM(params, num, name, value) \
if (value >= 0)\
virTypedParamListAddULLong((params), (value), "net.%zu.%s", (num), (name));
static int
static void
qemuDomainGetStatsInterface(virQEMUDriver *driver G_GNUC_UNUSED,
virDomainObj *dom,
virTypedParamList *params,
@ -17180,7 +17171,7 @@ qemuDomainGetStatsInterface(virQEMUDriver *driver G_GNUC_UNUSED,
size_t i;
if (!virDomainObjIsActive(dom))
return 0;
return;
virTypedParamListAddUInt(params, dom->def->nnets, "net.count");
@ -17219,8 +17210,6 @@ qemuDomainGetStatsInterface(virQEMUDriver *driver G_GNUC_UNUSED,
QEMU_ADD_NET_PARAM(params, i, "tx.errs", tmp.tx_errs);
QEMU_ADD_NET_PARAM(params, i, "tx.drop", tmp.tx_drop);
}
return 0;
}
#undef QEMU_ADD_NET_PARAM
@ -17481,7 +17470,7 @@ qemuDomainGetStatsBlockExportDisk(virDomainDiskDef *disk,
}
static int
static void
qemuDomainGetStatsBlock(virQEMUDriver *driver,
virDomainObj *dom,
virTypedParamList *params,
@ -17518,12 +17507,10 @@ qemuDomainGetStatsBlock(virQEMUDriver *driver,
virTypedParamListAddUInt(params, visited, "block.count");
virTypedParamListConcat(params, &blockparams);
return 0;
}
static int
static void
qemuDomainGetStatsIOThread(virQEMUDriver *driver G_GNUC_UNUSED,
virDomainObj *dom,
virTypedParamList *params,
@ -17534,17 +17521,17 @@ qemuDomainGetStatsIOThread(virQEMUDriver *driver G_GNUC_UNUSED,
int niothreads = 0;
if (!HAVE_JOB(privflags) || !virDomainObjIsActive(dom))
return 0;
return;
if (qemuDomainGetIOThreadsMon(dom, &iothreads, &niothreads) < 0) {
virResetLastError();
return 0;
return;
}
/* qemuDomainGetIOThreadsMon returns a NULL-terminated list, so we must free
* it even if it returns 0 */
if (niothreads == 0)
return 0;
return;
virTypedParamListAddUInt(params, niothreads, "iothread.count");
@ -17564,8 +17551,6 @@ qemuDomainGetStatsIOThread(virQEMUDriver *driver G_GNUC_UNUSED,
for (i = 0; i < niothreads; i++)
VIR_FREE(iothreads[i]);
return 0;
}
@ -17582,7 +17567,7 @@ qemuDomainGetStatsPerfOneEvent(virPerf *perf,
virTypedParamListAddULLong(params, value, "perf.%s", virPerfEventTypeToString(type));
}
static int
static void
qemuDomainGetStatsPerf(virQEMUDriver *driver G_GNUC_UNUSED,
virDomainObj *dom,
virTypedParamList *params,
@ -17597,12 +17582,10 @@ qemuDomainGetStatsPerf(virQEMUDriver *driver G_GNUC_UNUSED,
qemuDomainGetStatsPerfOneEvent(priv->perf, i, params);
}
return 0;
}
static int
static void
qemuDomainGetStatsDirtyRate(virQEMUDriver *driver G_GNUC_UNUSED,
virDomainObj *dom,
virTypedParamList *params,
@ -17613,7 +17596,7 @@ qemuDomainGetStatsDirtyRate(virQEMUDriver *driver G_GNUC_UNUSED,
int rv;
if (!HAVE_JOB(privflags) || !virDomainObjIsActive(dom))
return 0;
return;
qemuDomainObjEnterMonitor(dom);
rv = qemuMonitorQueryDirtyRate(priv->mon, &info);
@ -17621,7 +17604,7 @@ qemuDomainGetStatsDirtyRate(virQEMUDriver *driver G_GNUC_UNUSED,
if (rv < 0) {
virResetLastError();
return 0;
return;
}
virTypedParamListAddInt(params, info.status, "dirtyrate.calc_status");
@ -17642,12 +17625,10 @@ qemuDomainGetStatsDirtyRate(virQEMUDriver *driver G_GNUC_UNUSED,
}
}
}
return 0;
}
static int
static void
qemuDomainGetStatsVm(virQEMUDriver *driver G_GNUC_UNUSED,
virDomainObj *dom,
virTypedParamList *params,
@ -17659,10 +17640,10 @@ qemuDomainGetStatsVm(virQEMUDriver *driver G_GNUC_UNUSED,
virJSONValue *stats_obj = NULL;
if (!HAVE_JOB(privflags) || !virDomainObjIsActive(dom))
return 0;
return;
if (qemuDomainRefreshStatsSchema(dom) < 0)
return 0;
return;
qemuDomainObjEnterMonitor(dom);
queried_stats = qemuMonitorQueryStats(priv->mon,
@ -17671,17 +17652,15 @@ qemuDomainGetStatsVm(virQEMUDriver *driver G_GNUC_UNUSED,
qemuDomainObjExitMonitor(dom);
if (!queried_stats || virJSONValueArraySize(queried_stats) != 1)
return 0;
return;
stats_obj = virJSONValueArrayGet(queried_stats, 0);
stats = qemuMonitorExtractQueryStats(stats_obj);
qemuDomainAddStatsFromHashTable(stats, priv->statsSchema, "vm", params);
return 0;
}
typedef int
typedef void
(*qemuDomainGetStatsFunc)(virQEMUDriver *driver,
virDomainObj *dom,
virTypedParamList *list,
@ -17795,9 +17774,7 @@ qemuDomainGetStats(virConnectPtr conn,
for (i = 0; qemuDomainGetStatsWorkers[i].func; i++) {
if (stats & qemuDomainGetStatsWorkers[i].stats) {
if (qemuDomainGetStatsWorkers[i].func(conn->privateData, dom, params,
flags) < 0)
return -1;
qemuDomainGetStatsWorkers[i].func(conn->privateData, dom, params, flags);
}
}