qemuDomainGetResctrlMonData filled the monitor's reported name from
virResctrlMonitorGetID(), the bare id parsed from the domain XML (e.g.
"vcpus_0-1"). That is a bug and a duplicate: the id is only a fragment
of the real resctrl group name and vcpus are already reported with the
vcpus attribute. The group actually lives at mon_groups/<machine>-<id>.

Add virResctrlMonitorGetName(), which returns the basename of the
monitor's resctrl path. The stats name now maps 1:1 to the
mon_group directory backing the monitor.

Signed-off-by: Jedrzej Wasiukiewicz <[email protected]>
---
 src/libvirt_private.syms |  1 +
 src/qemu/qemu_driver.c   |  2 +-
 src/util/virresctrl.c    | 10 ++++++++++
 src/util/virresctrl.h    |  3 +++
 4 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index c76e5cb08a..5f0f0951b5 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -3390,6 +3390,7 @@ virResctrlMonitorAddPID;
 virResctrlMonitorCreate;
 virResctrlMonitorDeterminePath;
 virResctrlMonitorGetID;
+virResctrlMonitorGetName;
 virResctrlMonitorGetStats;
 virResctrlMonitorNew;
 virResctrlMonitorRemove;
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 44b41726fb..689456fd8b 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -17214,7 +17214,7 @@ qemuDomainGetResctrlMonData(virQEMUDriver *driver,
              * let this newly allocated memory buffer to be freed along with
              * the free of 'res' */
             res->vcpus = virBitmapFormat(domresmon->vcpus);
-            res->name = g_strdup(virResctrlMonitorGetID(monitor));
+            res->name = virResctrlMonitorGetName(monitor);
 
             if (virResctrlMonitorGetStats(monitor, (const char **)features,
                                           &res->stats, &res->nstats) < 0)
diff --git a/src/util/virresctrl.c b/src/util/virresctrl.c
index d4728d2e7c..80de5997fa 100644
--- a/src/util/virresctrl.c
+++ b/src/util/virresctrl.c
@@ -2585,6 +2585,16 @@ virResctrlMonitorGetID(virResctrlMonitor *monitor)
 }
 
 
+char *
+virResctrlMonitorGetName(virResctrlMonitor *monitor)
+{
+    if (!monitor->path)
+        return NULL;
+
+    return g_path_get_basename(monitor->path);
+}
+
+
 void
 virResctrlMonitorSetAlloc(virResctrlMonitor *monitor,
                           virResctrlAlloc *alloc)
diff --git a/src/util/virresctrl.h b/src/util/virresctrl.h
index 2818b6e8cc..c12b521621 100644
--- a/src/util/virresctrl.h
+++ b/src/util/virresctrl.h
@@ -233,6 +233,9 @@ virResctrlMonitorSetID(virResctrlMonitor *monitor,
 const char *
 virResctrlMonitorGetID(virResctrlMonitor *monitor);
 
+char *
+virResctrlMonitorGetName(virResctrlMonitor *monitor);
+
 void
 virResctrlMonitorSetAlloc(virResctrlMonitor *monitor,
                           virResctrlAlloc *alloc);
-- 
2.43.0

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