vircgrouptest: add detect mounts test for hybrid cgroups

Signed-off-by: NPavel Hrdina <phrdina@redhat.com>

tests/vircgroupdata/hybrid.cgroups

+#subsys_name	hierarchy	num_cgroups	enabled
+cpuset      2       1       1
+cpu         0       1       1
+cpuacct     0       1       1
+blkio       0       1       1
+memory      0       1       1
+devices     3       1       1
+freezer     5       1       1
+net_cls     4       1       1
+perf_event  6       1       1
+hugetlb     7       1       1
+pids        8       1       1

tests/vircgroupdata/hybrid.mounts

+proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0
+sysfs /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
+devtmpfs /dev devtmpfs rw,nosuid,size=10240k,nr_inodes=502705,mode=755 0 0
+devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0
+tmpfs /dev/shm tmpfs rw,nosuid,nodev,noexec 0 0
+tmpfs /run tmpfs rw,nosuid,nodev,noexec,mode=755 0 0
+mqueue /dev/mqueue mqueue rw,nosuid,nodev,noexec,relatime 0 0
+securityfs /sys/kernel/security securityfs rw,nosuid,nodev,noexec,relatime 0 0
+debugfs /sys/kernel/debug debugfs rw,nosuid,nodev,noexec,relatime 0 0
+configfs /sys/kernel/config configfs rw,nosuid,nodev,noexec,relatime 0 0
+fusectl /sys/fs/fuse/connections fusectl rw,nosuid,nodev,noexec,relatime 0 0
+selinuxfs /sys/fs/selinux selinuxfs rw,relatime 0 0
+pstore /sys/fs/pstore pstore rw,nosuid,nodev,noexec,relatime 0 0
+cgroup_root /not/really/sys/fs/cgroup tmpfs rw,nosuid,nodev,noexec,relatime,size=10240k,mode=755 0 0
+openrc /not/really/sys/fs/cgroup/openrc cgroup rw,nosuid,nodev,noexec,relatime,release_agent=/lib64/rc/sh/cgroup-release-agent.sh,name=openrc 0 0
+none /not/really/sys/fs/cgroup/unified cgroup2 rw,nosuid,nodev,noexec,relatime,nsdelegate 0 0
+cpuset /not/really/sys/fs/cgroup/cpuset cgroup rw,nosuid,nodev,noexec,relatime,cpuset 0 0
+devices /not/really/sys/fs/cgroup/devices cgroup rw,nosuid,nodev,noexec,relatime,devices 0 0
+net_cls /not/really/sys/fs/cgroup/net_cls cgroup rw,nosuid,nodev,noexec,relatime,net_cls 0 0
+freezer /not/really/sys/fs/cgroup/freezer cgroup rw,nosuid,nodev,noexec,relatime,freezer 0 0
+perf_event /not/really/sys/fs/cgroup/perf_event cgroup rw,nosuid,nodev,noexec,relatime,perf_event 0 0
+hugetlb /not/really/sys/fs/cgroup/hugetlb cgroup rw,nosuid,nodev,noexec,relatime,hugetlb 0 0
+pids /not/really/sys/fs/cgroup/pids cgroup rw,nosuid,nodev,noexec,relatime,pids 0 0

tests/vircgroupdata/hybrid.parsed

+cpu          <null>
+cpuacct      <null>
+cpuset       /not/really/sys/fs/cgroup/cpuset
+memory       <null>
+devices      /not/really/sys/fs/cgroup/devices
+freezer      /not/really/sys/fs/cgroup/freezer
+blkio        <null>
+net_cls      /not/really/sys/fs/cgroup/net_cls
+perf_event   /not/really/sys/fs/cgroup/perf_event
+name=systemd <null>
+unified      /not/really/sys/fs/cgroup/unified

tests/vircgroupdata/hybrid.self.cgroup

+8:pids:/
+7:hugetlb:/
+6:perf_event:/
+5:freezer:/
+4:net_cls:/
+3:devices:/
+2:cpuset:/
+1:name=openrc:/
+0::/

tests/vircgrouptest.c

@@ -902,6 +902,9 @@ mymain(void)
     fakerootdir = initFakeFS("unified", NULL);
     DETECT_MOUNTS("unified");
     cleanupFakeFS(fakerootdir);
+    fakerootdir = initFakeFS("hybrid", NULL);
+    DETECT_MOUNTS("hybrid");
+    cleanupFakeFS(fakerootdir);
 
     fakerootdir = initFakeFS(NULL, "systemd");
     if (virTestRun("New cgroup for self", testCgroupNewForSelf, NULL) < 0)