6:48 a.m.
Future patches which will implement more
bulk stats groups for QEMU will need to access
the connection object.
To accomodate that, a few changes are needed:
* enrich internal prototype to pass qemu driver object.
* add per-group flag to mark if one collector needs
monitor access or not.
* if at least one collector of the requested stats
needs monitor access, thus we must start a query job
for each domain. The specific collectors will
run nested monitor jobs inside that.
* although requested, monitor could be not available.
pass a flag to workers to signal the availability
of monitor, in order to gather as much data as
is possible anyway.
Signed-off-by: Francesco Romani <fromani(a)redhat.com>
---
src/qemu/qemu_driver.c | 60 +++++++++++++++++++++++++++++++++++++++++++-------
1 file changed, 52 insertions(+), 8 deletions(-)
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 917b286..279c8b3 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -17244,7 +17244,8 @@ qemuConnectGetDomainCapabilities(virConnectPtr conn,
static int
-qemuDomainGetStatsState(virDomainObjPtr dom,
+qemuDomainGetStatsState(virQEMUDriverPtr driver ATTRIBUTE_UNUSED,
+ virDomainObjPtr dom,
virDomainStatsRecordPtr record,
int *maxparams,
unsigned int privflags ATTRIBUTE_UNUSED)
@@ -17267,8 +17268,17 @@ qemuDomainGetStatsState(virDomainObjPtr dom,
}
+typedef enum {
+ QEMU_DOMAIN_STATS_HAVE_MONITOR = (1 << 0), /* QEMU monitor available */
+} qemuDomainStatsFlags;
+
+
+#define HAVE_MONITOR(flags) ((flags) & QEMU_DOMAIN_STATS_HAVE_MONITOR)
+
+
typedef int
-(*qemuDomainGetStatsFunc)(virDomainObjPtr dom,
+(*qemuDomainGetStatsFunc)(virQEMUDriverPtr driver,
+ virDomainObjPtr dom,
virDomainStatsRecordPtr record,
int *maxparams,
unsigned int flags);
@@ -17276,11 +17286,12 @@ typedef int
struct qemuDomainGetStatsWorker {
qemuDomainGetStatsFunc func;
unsigned int stats;
+ bool monitor;
};
static struct qemuDomainGetStatsWorker qemuDomainGetStatsWorkers[] = {
- { qemuDomainGetStatsState, VIR_DOMAIN_STATS_STATE},
- { NULL, 0 }
+ { qemuDomainGetStatsState, VIR_DOMAIN_STATS_STATE, false },
+ { NULL, 0, false }
};
@@ -17312,6 +17323,20 @@ qemuDomainGetStatsCheckSupport(unsigned int *stats,
}
+static bool
+qemuDomainGetStatsNeedMonitor(unsigned int stats)
+{
+ size_t i;
+
+ for (i = 0; qemuDomainGetStatsWorkers[i].func; i++)
+ if (stats & qemuDomainGetStatsWorkers[i].stats)
+ if (qemuDomainGetStatsWorkers[i].monitor)
+ return true;
+
+ return false;
+}
+
+
static int
qemuDomainGetStats(virConnectPtr conn,
virDomainObjPtr dom,
@@ -17329,8 +17354,8 @@ qemuDomainGetStats(virConnectPtr conn,
for (i = 0; qemuDomainGetStatsWorkers[i].func; i++) {
if (stats & qemuDomainGetStatsWorkers[i].stats) {
- if (qemuDomainGetStatsWorkers[i].func(dom, tmp, &maxparams,
- flags) < 0)
+ if (qemuDomainGetStatsWorkers[i].func(conn->privateData, dom, tmp,
+ &maxparams, flags) < 0)
goto cleanup;
}
}
@@ -17369,6 +17394,7 @@ qemuConnectGetAllDomainStats(virConnectPtr conn,
int nstats = 0;
size_t i;
int ret = -1;
+ unsigned int privflags = 0;
if (ndoms)
virCheckFlags(VIR_CONNECT_GET_ALL_DOMAINS_STATS_ENFORCE_STATS, -1);
@@ -17403,6 +17429,9 @@ qemuConnectGetAllDomainStats(virConnectPtr conn,
if (VIR_ALLOC_N(tmpstats, ndoms + 1) < 0)
goto cleanup;
+ if (qemuDomainGetStatsNeedMonitor(stats))
+ privflags |= QEMU_DOMAIN_STATS_HAVE_MONITOR;
+
for (i = 0; i < ndoms; i++) {
virDomainStatsRecordPtr tmp = NULL;
@@ -17413,12 +17442,22 @@ qemuConnectGetAllDomainStats(virConnectPtr conn,
!virConnectGetAllDomainStatsCheckACL(conn, dom->def))
continue;
- if (qemuDomainGetStats(conn, dom, stats, &tmp, flags) < 0)
- goto cleanup;
+ if (HAVE_MONITOR(privflags) &&
+ qemuDomainObjBeginJob(driver, dom, QEMU_JOB_QUERY) < 0)
+ /* As it was never requested. Gather as much as possible anyway. */
+ privflags &= ~QEMU_DOMAIN_STATS_HAVE_MONITOR;
+
+ if (qemuDomainGetStats(conn, dom, stats, &tmp, privflags) < 0)
+ goto endjob;
if (tmp)
tmpstats[nstats++] = tmp;
+ if (HAVE_MONITOR(privflags) && !qemuDomainObjEndJob(driver, dom)) {
+ dom = NULL;
+ goto cleanup;
+ }
+
virObjectUnlock(dom);
dom = NULL;
}
@@ -17428,6 +17467,11 @@ qemuConnectGetAllDomainStats(virConnectPtr conn,
ret = nstats;
+ endjob:
+ if (HAVE_MONITOR(privflags) && dom)
+ if (!qemuDomainObjEndJob(driver, dom))
+ dom = NULL;
+
cleanup:
if (dom)
virObjectUnlock(dom);
--
1.9.3