// +build !windows /* Copyright 2019 The Kubernetes Authors. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ package mount import ( "io/ioutil" "os" "path/filepath" "reflect" "testing" ) func writeFile(content string) (string, string, error) { tempDir, err := ioutil.TempDir("", "mounter_shared_test") if err != nil { return "", "", err } filename := filepath.Join(tempDir, "mountinfo") err = ioutil.WriteFile(filename, []byte(content), 0600) if err != nil { os.RemoveAll(tempDir) return "", "", err } return tempDir, filename, nil } func TestParseMountInfo(t *testing.T) { info := `62 0 253:0 / / rw,relatime shared:1 - ext4 /dev/mapper/ssd-root rw,seclabel,data=ordered 78 62 0:41 / /tmp rw,nosuid,nodev shared:30 - tmpfs tmpfs rw,seclabel 80 62 0:42 / /var/lib/nfs/rpc_pipefs rw,relatime shared:31 - rpc_pipefs sunrpc rw 82 62 0:43 / /var/lib/foo rw,relatime shared:32 - tmpfs tmpfs rw 83 63 0:44 / /var/lib/bar rw,relatime - tmpfs tmpfs rw 227 62 253:0 /var/lib/docker/devicemapper /var/lib/docker/devicemapper rw,relatime - ext4 /dev/mapper/ssd-root rw,seclabel,data=ordered 224 62 253:0 /var/lib/docker/devicemapper/test/shared /var/lib/docker/devicemapper/test/shared rw,relatime master:1 shared:44 - ext4 /dev/mapper/ssd-root rw,seclabel,data=ordered 76 17 8:1 / /mnt/stateful_partition rw,nosuid,nodev,noexec,relatime - ext4 /dev/sda1 rw,commit=30,data=ordered 80 17 8:1 /var /var rw,nosuid,nodev,noexec,relatime shared:30 - ext4 /dev/sda1 rw,commit=30,data=ordered 189 80 8:1 /var/lib/kubelet /var/lib/kubelet rw,relatime shared:30 - ext4 /dev/sda1 rw,commit=30,data=ordered 818 77 8:40 / /var/lib/kubelet/pods/c25464af-e52e-11e7-ab4d-42010a800002/volumes/kubernetes.io~gce-pd/vol1 rw,relatime shared:290 - ext4 /dev/sdc rw,data=ordered 819 78 8:48 / /var/lib/kubelet/pods/c25464af-e52e-11e7-ab4d-42010a800002/volumes/kubernetes.io~gce-pd/vol1 rw,relatime shared:290 - ext4 /dev/sdd rw,data=ordered 900 100 8:48 /dir1 /var/lib/kubelet/pods/c25464af-e52e-11e7-ab4d-42010a800002/volume-subpaths/vol1/subpath1/0 rw,relatime shared:290 - ext4 /dev/sdd rw,data=ordered 901 101 8:1 /dir1 /var/lib/kubelet/pods/c25464af-e52e-11e7-ab4d-42010a800002/volume-subpaths/vol1/subpath1/1 rw,relatime shared:290 - ext4 /dev/sdd rw,data=ordered 902 102 8:1 /var/lib/kubelet/pods/d4076f24-e53a-11e7-ba15-42010a800002/volumes/kubernetes.io~empty-dir/vol1/dir1 /var/lib/kubelet/pods/d4076f24-e53a-11e7-ba15-42010a800002/volume-subpaths/vol1/subpath1/0 rw,relatime shared:30 - ext4 /dev/sda1 rw,commit=30,data=ordered 903 103 8:1 /var/lib/kubelet/pods/d4076f24-e53a-11e7-ba15-42010a800002/volumes/kubernetes.io~empty-dir/vol2/dir1 /var/lib/kubelet/pods/d4076f24-e53a-11e7-ba15-42010a800002/volume-subpaths/vol1/subpath1/1 rw,relatime shared:30 - ext4 /dev/sda1 rw,commit=30,data=ordered 178 25 253:0 /etc/bar /var/lib/kubelet/pods/12345/volume-subpaths/vol1/subpath1/0 rw,relatime shared:1 - ext4 /dev/sdb2 rw,errors=remount-ro,data=ordered 698 186 0:41 /tmp1/dir1 /var/lib/kubelet/pods/41135147-e697-11e7-9342-42010a800002/volume-subpaths/vol1/subpath1/0 rw shared:26 - tmpfs tmpfs rw 918 77 8:50 / /var/lib/kubelet/pods/2345/volumes/kubernetes.io~gce-pd/vol1 rw,relatime shared:290 - ext4 /dev/sdc rw,data=ordered 919 78 8:58 / /var/lib/kubelet/pods/2345/volumes/kubernetes.io~gce-pd/vol1 rw,relatime shared:290 - ext4 /dev/sdd rw,data=ordered 920 100 8:50 /dir1 /var/lib/kubelet/pods/2345/volume-subpaths/vol1/subpath1/0 rw,relatime shared:290 - ext4 /dev/sdc rw,data=ordered 150 23 1:58 / /media/nfs_vol rw,relatime shared:89 - nfs4 172.18.4.223:/srv/nfs rw,vers=4.0,rsize=524288,wsize=524288,namlen=255,hard,proto=tcp,port=0,timeo=600,retrans=2,sec=sys,clientaddr=172.18.4.223,local_lock=none,addr=172.18.4.223 151 24 1:58 / /media/nfs_bindmount rw,relatime shared:89 - nfs4 172.18.4.223:/srv/nfs/foo rw,vers=4.0,rsize=524288,wsize=524288,namlen=255,hard,proto=tcp,port=0,timeo=600,retrans=2,sec=sys,clientaddr=172.18.4.223,local_lock=none,addr=172.18.4.223 134 23 0:58 / /var/lib/kubelet/pods/43219158-e5e1-11e7-a392-0e858b8eaf40/volumes/kubernetes.io~nfs/nfs1 rw,relatime shared:89 - nfs4 172.18.4.223:/srv/nfs rw,vers=4.0,rsize=524288,wsize=524288,namlen=255,hard,proto=tcp,port=0,timeo=600,retrans=2,sec=sys,clientaddr=172.18.4.223,local_lock=none,addr=172.18.4.223 187 23 0:58 / /var/lib/kubelet/pods/1fc5ea21-eff4-11e7-ac80-0e858b8eaf40/volumes/kubernetes.io~nfs/nfs2 rw,relatime shared:96 - nfs4 172.18.4.223:/srv/nfs2 rw,vers=4.0,rsize=524288,wsize=524288,namlen=255,hard,proto=tcp,port=0,timeo=600,retrans=2,sec=sys,clientaddr=172.18.4.223,local_lock=none,addr=172.18.4.223 188 24 0:58 / /var/lib/kubelet/pods/43219158-e5e1-11e7-a392-0e858b8eaf40/volume-subpaths/nfs1/subpath1/0 rw,relatime shared:89 - nfs4 172.18.4.223:/srv/nfs/foo rw,vers=4.0,rsize=524288,wsize=524288,namlen=255,hard,proto=tcp,port=0,timeo=600,retrans=2,sec=sys,clientaddr=172.18.4.223,local_lock=none,addr=172.18.4.223 347 60 0:71 / /var/lib/kubelet/pods/13195d46-f9fa-11e7-bbf1-5254007a695a/volumes/kubernetes.io~nfs/vol2 rw,relatime shared:170 - nfs 172.17.0.3:/exports/2 rw,vers=3,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=172.17.0.3,mountvers=3,mountport=20048,mountproto=udp,local_lock=none,addr=172.17.0.3 222 24 253:0 /tmp/src /mnt/dst rw,relatime shared:1 - ext4 /dev/mapper/vagrant--vg-root rw,errors=remount-ro,data=ordered 28 18 0:24 / /sys/fs/cgroup ro,nosuid,nodev,noexec shared:9 - tmpfs tmpfs ro,mode=755 29 28 0:25 / /sys/fs/cgroup/systemd rw,nosuid,nodev,noexec,relatime shared:10 - cgroup cgroup rw,xattr,release_agent=/lib/systemd/systemd-cgroups-agent,name=systemd 31 28 0:27 / /sys/fs/cgroup/cpuset rw,nosuid,nodev,noexec,relatime shared:13 - cgroup cgroup rw,cpuset 32 28 0:28 / /sys/fs/cgroup/cpu,cpuacct rw,nosuid,nodev,noexec,relatime shared:14 - cgroup cgroup rw,cpu,cpuacct 33 28 0:29 / /sys/fs/cgroup/freezer rw,nosuid,nodev,noexec,relatime shared:15 - cgroup cgroup rw,freezer 34 28 0:30 / /sys/fs/cgroup/net_cls,net_prio rw,nosuid,nodev,noexec,relatime shared:16 - cgroup cgroup rw,net_cls,net_prio 35 28 0:31 / /sys/fs/cgroup/pids rw,nosuid,nodev,noexec,relatime shared:17 - cgroup cgroup rw,pids 36 28 0:32 / /sys/fs/cgroup/devices rw,nosuid,nodev,noexec,relatime shared:18 - cgroup cgroup rw,devices 37 28 0:33 / /sys/fs/cgroup/hugetlb rw,nosuid,nodev,noexec,relatime shared:19 - cgroup cgroup rw,hugetlb 38 28 0:34 / /sys/fs/cgroup/blkio rw,nosuid,nodev,noexec,relatime shared:20 - cgroup cgroup rw,blkio 39 28 0:35 / /sys/fs/cgroup/memory rw,nosuid,nodev,noexec,relatime shared:21 - cgroup cgroup rw,memory 40 28 0:36 / /sys/fs/cgroup/perf_event rw,nosuid,nodev,noexec,relatime shared:22 - cgroup cgroup rw,perf_event ` tempDir, filename, err := writeFile(info) if err != nil { t.Fatalf("cannot create temporary file: %v", err) } defer os.RemoveAll(tempDir) tests := []struct { name string id int expectedInfo MountInfo }{ { "simple bind mount", 189, MountInfo{ ID: 189, ParentID: 80, Major: 8, Minor: 1, Root: "/var/lib/kubelet", Source: "/dev/sda1", MountPoint: "/var/lib/kubelet", OptionalFields: []string{"shared:30"}, FsType: "ext4", MountOptions: []string{"rw", "relatime"}, SuperOptions: []string{"rw", "commit=30", "data=ordered"}, }, }, { "bind mount a directory", 222, MountInfo{ ID: 222, ParentID: 24, Major: 253, Minor: 0, Root: "/tmp/src", Source: "/dev/mapper/vagrant--vg-root", MountPoint: "/mnt/dst", OptionalFields: []string{"shared:1"}, FsType: "ext4", MountOptions: []string{"rw", "relatime"}, SuperOptions: []string{"rw", "errors=remount-ro", "data=ordered"}, }, }, { "more than one optional fields", 224, MountInfo{ ID: 224, ParentID: 62, Major: 253, Minor: 0, Root: "/var/lib/docker/devicemapper/test/shared", Source: "/dev/mapper/ssd-root", MountPoint: "/var/lib/docker/devicemapper/test/shared", OptionalFields: []string{"master:1", "shared:44"}, FsType: "ext4", MountOptions: []string{"rw", "relatime"}, SuperOptions: []string{"rw", "seclabel", "data=ordered"}, }, }, { "cgroup-mountpoint", 28, MountInfo{ ID: 28, ParentID: 18, Major: 0, Minor: 24, Root: "/", Source: "tmpfs", MountPoint: "/sys/fs/cgroup", OptionalFields: []string{"shared:9"}, FsType: "tmpfs", MountOptions: []string{"ro", "nosuid", "nodev", "noexec"}, SuperOptions: []string{"ro", "mode=755"}, }, }, { "cgroup-subsystem-systemd-mountpoint", 29, MountInfo{ ID: 29, ParentID: 28, Major: 0, Minor: 25, Root: "/", Source: "cgroup", MountPoint: "/sys/fs/cgroup/systemd", OptionalFields: []string{"shared:10"}, FsType: "cgroup", MountOptions: []string{"rw", "nosuid", "nodev", "noexec", "relatime"}, SuperOptions: []string{"rw", "xattr", "release_agent=/lib/systemd/systemd-cgroups-agent", "name=systemd"}, }, }, { "cgroup-subsystem-cpuset-mountpoint", 31, MountInfo{ ID: 31, ParentID: 28, Major: 0, Minor: 27, Root: "/", Source: "cgroup", MountPoint: "/sys/fs/cgroup/cpuset", OptionalFields: []string{"shared:13"}, FsType: "cgroup", MountOptions: []string{"rw", "nosuid", "nodev", "noexec", "relatime"}, SuperOptions: []string{"rw", "cpuset"}, }, }, } infos, err := ParseMountInfo(filename) if err != nil { t.Fatalf("Cannot parse %s: %s", filename, err) } for _, test := range tests { found := false for _, info := range infos { if info.ID == test.id { found = true if !reflect.DeepEqual(info, test.expectedInfo) { t.Errorf("Test case %q:\n expected: %+v\n got: %+v", test.name, test.expectedInfo, info) } break } } if !found { t.Errorf("Test case %q: mountPoint %d not found", test.name, test.id) } } } func TestBadParseMountInfo(t *testing.T) { tests := []struct { info string name string id int expectedInfo *MountInfo error string }{ { `224 62 253:0 /var/lib/docker/devicemapper/test/shared /var/lib/docker/devicemapper/test/shared rw,relatime master:1 shared:44 - ext4 /dev/mapper/ssd-root rw,seclabel,data=ordered`, "good major:minor field", 224, &MountInfo{ ID: 224, ParentID: 62, Major: 253, Minor: 0, Root: "/var/lib/docker/devicemapper/test/shared", Source: "/dev/mapper/ssd-root", MountPoint: "/var/lib/docker/devicemapper/test/shared", OptionalFields: []string{"master:1", "shared:44"}, FsType: "ext4", MountOptions: []string{"rw", "relatime"}, SuperOptions: []string{"rw", "seclabel", "data=ordered"}, }, "", }, { `224 62 /var/lib/docker/devicemapper/test/shared /var/lib/docker/devicemapper/test/shared rw,relatime master:1 shared:44 - ext4 /dev/mapper/ssd-root rw,seclabel,data=ordered`, "missing major:minor field", 224, nil, `parsing '224 62 /var/lib/docker/devicemapper/test/shared /var/lib/docker/devicemapper/test/shared rw,relatime master:1 shared:44 - ext4 /dev/mapper/ssd-root rw,seclabel,data=ordered' failed: unexpected minor:major pair [/var/lib/docker/devicemapper/test/shared]`, }, { `224 62 :0 /var/lib/docker/devicemapper/test/shared /var/lib/docker/devicemapper/test/shared rw,relatime master:1 shared:44 - ext4 /dev/mapper/ssd-root rw,seclabel,data=ordered`, "empty major field", 224, nil, `parsing '' failed: unable to parse major device id, err:strconv.Atoi: parsing "": invalid syntax`, }, { `224 62 253: /var/lib/docker/devicemapper/test/shared /var/lib/docker/devicemapper/test/shared rw,relatime master:1 shared:44 - ext4 /dev/mapper/ssd-root rw,seclabel,data=ordered`, "empty minor field", 224, nil, `parsing '' failed: unable to parse minor device id, err:strconv.Atoi: parsing "": invalid syntax`, }, { `224 62 foo:0 /var/lib/docker/devicemapper/test/shared /var/lib/docker/devicemapper/test/shared rw,relatime master:1 shared:44 - ext4 /dev/mapper/ssd-root rw,seclabel,data=ordered`, "alphabet in major field", 224, nil, `parsing 'foo' failed: unable to parse major device id, err:strconv.Atoi: parsing "foo": invalid syntax`, }, { `224 62 253:bar /var/lib/docker/devicemapper/test/shared /var/lib/docker/devicemapper/test/shared rw,relatime master:1 shared:44 - ext4 /dev/mapper/ssd-root rw,seclabel,data=ordered`, "alphabet in minor field", 224, nil, `parsing 'bar' failed: unable to parse minor device id, err:strconv.Atoi: parsing "bar": invalid syntax`, }, } for _, test := range tests { tempDir, filename, err := writeFile(test.info) if err != nil { t.Fatalf("cannot create temporary file: %v", err) } defer os.RemoveAll(tempDir) infos, err := ParseMountInfo(filename) if err != nil { if err.Error() != test.error { t.Errorf("Test case %q:\n expected error: %+v\n got: %+v", test.name, test.error, err.Error()) } continue } found := false for _, info := range infos { if info.ID == test.id { found = true if !reflect.DeepEqual(info, *test.expectedInfo) { t.Errorf("Test case %q:\n expected: %+v\n got: %+v", test.name, test.expectedInfo, info) } break } } if !found { t.Errorf("Test case %q: mountPoint %d not found", test.name, test.id) } } }