[libvirt] [PATCH 02/12] qemu: Return perf status that affect next boot for shutoff domains

[Lin Ma]

While we set up perf events for a shutoff domain and check the settings,
All of perf events are reported as 'disabled', unless we add --config,
This is redundant for a shutoff domain.

 # virsh domstate $GUEST
shut off

 # virsh perf --domain $GUEST
cmt            : disabled
mbmt           : disabled
mbml           : disabled
......

 # virsh perf --domain $GUEST --enable mbmt
mbmt           : enabled

 # virsh perf --domain $GUEST
cmt            : disabled
mbmt           : disabled
mbml           : disabled
......

Use virDomainObjGetOneDefState instead of virDomainObjGetOneDef to fix
the issue. After patch, The perf event status of a shutoff domain is
reported correctly:

 # virsh domstate $GUEST
shut off

 # virsh perf --domain $GUEST
cmt            : disabled
mbmt           : disabled
mbml           : disabled
......

 # virsh perf --domain $GUEST --enable mbmt
mbmt           : enabled

 # virsh perf --domain $GUEST
cmt            : disabled
mbmt           : enabled
mbml           : disabled
......

Signed-off-by: Lin Ma <lma at suse.de>
---
 src/qemu/qemu_driver.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index bd287f259e..717afcd34d 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -9109,6 +9109,7 @@ qemuDomainGetPerfEvents(virDomainPtr dom,
     int npar = 0;
     size_t i;
     int ret = -1;
+    bool live = false;
 
     virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
                   VIR_DOMAIN_AFFECT_CONFIG |
@@ -9123,7 +9124,7 @@ qemuDomainGetPerfEvents(virDomainPtr dom,
     if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
         goto cleanup;
 
-    if (!(def = virDomainObjGetOneDef(vm, flags)))
+    if (!(def = virDomainObjGetOneDefState(vm, flags, &live)))
         goto endjob;
 
     priv = vm->privateData;
@@ -9131,7 +9132,7 @@ qemuDomainGetPerfEvents(virDomainPtr dom,
     for (i = 0; i < VIR_PERF_EVENT_LAST; i++) {
         bool perf_enabled;
 
-        if (flags & VIR_DOMAIN_AFFECT_CONFIG)
+        if ((flags & VIR_DOMAIN_AFFECT_CONFIG) || !live)
             perf_enabled = def->perf.events[i] == VIR_TRISTATE_BOOL_YES;
         else
             perf_enabled = virPerfEventIsEnabled(priv->perf, i);
-- 
2.26.0