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vircgroup: introduce virCgroupV2BindMount

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Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
This commit is contained in:
Pavel Hrdina 2018-09-28 20:40:11 +02:00
parent 38411bb831
commit cda8ed0646
1 changed files with 34 additions and 0 deletions
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34
src/util/vircgroupv2.c
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@ -21,6 +21,7 @@
#ifdef __linux__
# include <mntent.h>
# include <sys/mount.h>
#endif /* __linux__ */
#include "internal.h"
@ -461,6 +462,38 @@ 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,
@ -480,6 +513,7 @@ virCgroupBackend virCgroupV2Backend = {
.remove = virCgroupV2Remove,
.addTask = virCgroupV2AddTask,
.hasEmptyTasks = virCgroupV2HasEmptyTasks,
.bindMount = virCgroupV2BindMount,
};