[libvirt] [PATCH 18/53] vircgroup: introduce virCgroupV2BindMount
Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com>
---
src/util/vircgroupv2.c | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/src/util/vircgroupv2.c b/src/util/vircgroupv2.c
index c6a9e0a7df..e30f438015 100644
--- a/src/util/vircgroupv2.c
+++ b/src/util/vircgroupv2.c
@@ -21,6 +21,7 @@
#ifdef __linux__
# include <mntent.h>
+# include <sys/mount.h>
#endif /* __linux__ */
#include "internal.h"
@@ -462,6 +463,38 @@ virCgroupV2HasEmptyTasks(virCgroupPtr cgroup,
}
+static int
+virCgroupV2BindMount(virCgroupPtr group,
+ const char *oldroot,
+ const char *mountopts)
+{
+ VIR_AUTOFREE(char *) opts = NULL;
+ VIR_AUTOFREE(char *) src = NULL;
+
+ VIR_DEBUG("Mounting cgroups at '%s'",
group->unified.mountPoint);
+
+ if (virFileMakePath(group->unified.mountPoint) < 0) {
+ virReportSystemError(errno, _("Unable to create directory %s"),
+ group->unified.mountPoint);
+ return -1;
+ }
+
+ if (virAsprintf(&opts, "mode=755,size=65536%s", mountopts) < 0)
+ return -1;
+
+ if (virAsprintf(&src, "%s%s", oldroot, group->unified.mountPoint)
< 0)
+ return -1;
+
+ if (mount(src, group->unified.mountPoint, "none", MS_BIND, NULL) < 0)
{
+ virReportSystemError(errno, _("Failed to bind cgroup '%s' on
'%s'"),
+ src, group->unified.mountPoint);
+ return -1;
+ }
+
+ return 0;
+}
+
+
virCgroupBackend virCgroupV2Backend = {
.type = VIR_CGROUP_BACKEND_TYPE_V2,
@@ -481,6 +514,7 @@ virCgroupBackend virCgroupV2Backend = {
.remove = virCgroupV2Remove,
.addTask = virCgroupV2AddTask,
.hasEmptyTasks = virCgroupV2HasEmptyTasks,
+ .bindMount = virCgroupV2BindMount,
};
--
2.17.1