[PATCHv4 15/18] qemu: enable resctrl monitor in qemu

[Wang Huaqiang <huaqiang.wang@xxxxxxxxx>]

Add functions for creating, destroying, reconnecting resctrl
monitor in qemu according to the configuration in domain XML.

Signed-off-by: Wang Huaqiang <huaqiang.wang@xxxxxxxxx>
---
 src/qemu/qemu_process.c | 41 ++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 40 insertions(+), 1 deletion(-)

diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index 29b0ba1..9b103e8 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -2611,10 +2611,21 @@ qemuProcessResctrlCreate(virQEMUDriverPtr driver,
         return -1;
 
     for (i = 0; i < vm->def->nresctrls; i++) {
+        size_t j = 0;
         if (virResctrlAllocCreate(caps->host.resctrl,
                                   vm->def->resctrls[i]->alloc,
                                   priv->machineName) < 0)
             goto cleanup;
+
+        for (j = 0; j < vm->def->resctrls[i]->nmonitors; j++) {
+            virDomainResctrlMonDefPtr mon = vm->def->resctrls[i]->monitors[j];
+
+            if (virResctrlMonitorCreate(vm->def->resctrls[i]->alloc,
+                                        mon->instance,
+                                        priv->machineName) < 0)
+                goto cleanup;
+
+        }
     }
 
     ret = 0;
@@ -5443,11 +5454,22 @@ qemuProcessSetupVcpu(virDomainObjPtr vm,
         return -1;
 
     for (i = 0; i < vm->def->nresctrls; i++) {
+        size_t j = 0;
         virDomainResctrlDefPtr ct = vm->def->resctrls[i];
 
         if (virBitmapIsBitSet(ct->vcpus, vcpuid)) {
             if (virResctrlAllocAddPID(ct->alloc, vcpupid) < 0)
                 return -1;
+
+            for (j = 0; j < vm->def->resctrls[i]->nmonitors; j++) {
+                virDomainResctrlMonDefPtr mon = NULL;
+
+                mon = vm->def->resctrls[i]->monitors[j];
+                if (virBitmapIsBitSet(mon->vcpus, vcpuid)) {
+                    if (virResctrlMonitorAddPID(mon->instance, vcpupid) < 0)
+                        return -1;
+                }
+            }
             break;
         }
     }
@@ -7210,8 +7232,15 @@ void qemuProcessStop(virQEMUDriverPtr driver,
     /* Remove resctrl allocation after cgroups are cleaned up which makes it
      * kind of safer (although removing the allocation should work even with
      * pids in tasks file */
-    for (i = 0; i < vm->def->nresctrls; i++)
+    for (i = 0; i < vm->def->nresctrls; i++) {
+        size_t j = 0;
+
         virResctrlAllocRemove(vm->def->resctrls[i]->alloc);
+        for (j = 0; j < vm->def->resctrls[i]->nmonitors; j++) {
+            virDomainResctrlMonDefPtr mon = vm->def->resctrls[i]->monitors[j];
+            virResctrlMonitorRemove(mon->instance);
+        }
+    }
 
     qemuProcessRemoveDomainStatus(driver, vm);
 
@@ -7947,9 +7976,19 @@ qemuProcessReconnect(void *opaque)
         goto error;
 
     for (i = 0; i < obj->def->nresctrls; i++) {
+        size_t j = 0;
+
         if (virResctrlAllocDeterminePath(obj->def->resctrls[i]->alloc,
                                          priv->machineName) < 0)
             goto error;
+
+        for (j = 0; j < obj->def->resctrls[i]->nmonitors; j++) {
+            virDomainResctrlMonDefPtr mon = obj->def->resctrls[i]->monitors[j];
+
+            if (virResctrlMonitorDeterminePath(mon->instance,
+                                               priv->machineName) < 0)
+                goto error;
+        }
     }
 
     /* update domain state XML with possibly updated state in virDomainObj */
-- 
2.7.4

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