[libvirt] [PATCH 1/6] Introduce the function virCgroupForHypervisor
Introduce the function virCgroupForHypervisor() to create sub directory
for hypervisor thread(include I/O thread, vhost-net thread)
---
src/libvirt_private.syms | 1 +
src/util/cgroup.c | 42 ++++++++++++++++++++++++++++++++++++++++++
src/util/cgroup.h | 4 ++++
3 files changed, 47 insertions(+), 0 deletions(-)
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 8d29e75..a11b29c 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -66,6 +66,7 @@ virCgroupDenyAllDevices;
virCgroupDenyDevicePath;
virCgroupForDomain;
virCgroupForDriver;
+virCgroupForHypervisor;
virCgroupForVcpu;
virCgroupFree;
virCgroupGetBlkioWeight;
diff --git a/src/util/cgroup.c b/src/util/cgroup.c
index ad49bc2..901a841 100644
--- a/src/util/cgroup.c
+++ b/src/util/cgroup.c
@@ -944,6 +944,48 @@ int virCgroupForVcpu(virCgroupPtr driver ATTRIBUTE_UNUSED,
#endif
/**
+ * virCgroupForHypervisor:
+ *
+ * @driver: group for the domain
+ * @group: Pointer to returned virCgroupPtr
+ *
+ * Returns 0 on success
+ */
+#if defined HAVE_MNTENT_H && defined HAVE_GETMNTENT_R
+int virCgroupForHypervisor(virCgroupPtr driver,
+ virCgroupPtr *group,
+ int create)
+{
+ int rc;
+ char *path;
+
+ if (driver == NULL)
+ return -EINVAL;
+
+ if (virAsprintf(&path, "%s/hypervisor", driver->path) < 0)
+ return -ENOMEM;
+
+ rc = virCgroupNew(path, group);
+ VIR_FREE(path);
+
+ if (rc == 0) {
+ rc = virCgroupMakeGroup(driver, *group, create, VIR_CGROUP_VCPU);
+ if (rc != 0)
+ virCgroupFree(group);
+ }
+
+ return rc;
+}
+#else
+int virCgroupForHypervisor(virCgroupPtr driver ATTRIBUTE_UNUSED,
+ virCgroupPtr *group ATTRIBUTE_UNUSED,
+ int create ATTRIBUTE_UNUSED)
+{
+ return -ENXIO;
+}
+
+#endif
+/**
* virCgroupSetBlkioWeight:
*
* @group: The cgroup to change io weight for
diff --git a/src/util/cgroup.h b/src/util/cgroup.h
index 8486c42..34fcbf5 100644
--- a/src/util/cgroup.h
+++ b/src/util/cgroup.h
@@ -45,6 +45,10 @@ int virCgroupForVcpu(virCgroupPtr driver,
virCgroupPtr *group,
int create);
+int virCgroupForHypervisor(virCgroupPtr driver,
+ virCgroupPtr *group,
+ int create);
+
int virCgroupPathOfController(virCgroupPtr group,
int controller,
const char *key,
--
1.7.1