mountinfo_test.go

Documentation: github.com/prometheus/procfs

     1  // Copyright 2019 The Prometheus Authors
     2  // Licensed under the Apache License, Version 2.0 (the "License");
     3  // you may not use this file except in compliance with the License.
     4  // You may obtain a copy of the License at
     5  //
     6  // http://www.apache.org/licenses/LICENSE-2.0
     7  //
     8  // Unless required by applicable law or agreed to in writing, software
     9  // distributed under the License is distributed on an "AS IS" BASIS,
    10  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  package procfs
    14  
    15  import (
    16  	"reflect"
    17  	"testing"
    18  )
    19  
    20  func TestMountInfo(t *testing.T) {
    21  	tests := []struct {
    22  		name    string
    23  		s       string
    24  		mount   *MountInfo
    25  		invalid bool
    26  	}{
    27  		{
    28  			name:    "Regular sysfs mounted at /sys",
    29  			s:       "16 21 0:16 / /sys rw,nosuid,nodev,noexec,relatime shared:7 - sysfs sysfs rw",
    30  			invalid: false,
    31  			mount: &MountInfo{
    32  				MountID:        16,
    33  				ParentID:       21,
    34  				MajorMinorVer:  "0:16",
    35  				Root:           "/",
    36  				MountPoint:     "/sys",
    37  				Options:        map[string]string{"rw": "", "nosuid": "", "nodev": "", "noexec": "", "relatime": ""},
    38  				OptionalFields: map[string]string{"shared": "7"},
    39  				FSType:         "sysfs",
    40  				Source:         "sysfs",
    41  				SuperOptions:   map[string]string{"rw": ""},
    42  			},
    43  		},
    44  		{
    45  			name:    "Not enough information",
    46  			s:       "hello",
    47  			invalid: true,
    48  		},
    49  		{
    50  			name: "Tmpfs mounted at /run",
    51  			s:    "225 20 0:39 / /run/user/112 rw,nosuid,nodev,relatime shared:177 - tmpfs tmpfs rw,size=405096k,mode=700,uid=112,gid=116",
    52  			mount: &MountInfo{
    53  				MountID:        225,
    54  				ParentID:       20,
    55  				MajorMinorVer:  "0:39",
    56  				Root:           "/",
    57  				MountPoint:     "/run/user/112",
    58  				Options:        map[string]string{"rw": "", "nosuid": "", "nodev": "", "relatime": ""},
    59  				OptionalFields: map[string]string{"shared": "177"},
    60  				FSType:         "tmpfs",
    61  				Source:         "tmpfs",
    62  				SuperOptions:   map[string]string{"rw": "", "size": "405096k", "mode": "700", "uid": "112", "gid": "116"},
    63  			},
    64  			invalid: false,
    65  		},
    66  		{
    67  			name: "Tmpfs mounted at /run, but no optional values",
    68  			s:    "225 20 0:39 / /run/user/112 rw,nosuid,nodev,relatime  - tmpfs tmpfs rw,size=405096k,mode=700,uid=112,gid=116",
    69  			mount: &MountInfo{
    70  				MountID:        225,
    71  				ParentID:       20,
    72  				MajorMinorVer:  "0:39",
    73  				Root:           "/",
    74  				MountPoint:     "/run/user/112",
    75  				Options:        map[string]string{"rw": "", "nosuid": "", "nodev": "", "relatime": ""},
    76  				OptionalFields: nil,
    77  				FSType:         "tmpfs",
    78  				Source:         "tmpfs",
    79  				SuperOptions:   map[string]string{"rw": "", "size": "405096k", "mode": "700", "uid": "112", "gid": "116"},
    80  			},
    81  			invalid: false,
    82  		},
    83  		{
    84  			name: "Tmpfs mounted at /run, with multiple optional values",
    85  			s:    "225 20 0:39 / /run/user/112 rw,nosuid,nodev,relatime shared:177 master:8 - tmpfs tmpfs rw,size=405096k,mode=700,uid=112,gid=116",
    86  			mount: &MountInfo{
    87  				MountID:        225,
    88  				ParentID:       20,
    89  				MajorMinorVer:  "0:39",
    90  				Root:           "/",
    91  				MountPoint:     "/run/user/112",
    92  				Options:        map[string]string{"rw": "", "nosuid": "", "nodev": "", "relatime": ""},
    93  				OptionalFields: map[string]string{"shared": "177", "master": "8"},
    94  				FSType:         "tmpfs",
    95  				Source:         "tmpfs",
    96  				SuperOptions:   map[string]string{"rw": "", "size": "405096k", "mode": "700", "uid": "112", "gid": "116"},
    97  			},
    98  			invalid: false,
    99  		},
   100  		{
   101  			name: "Tmpfs mounted at /run, with a mixture of valid and invalid optional values",
   102  			s:    "225 20 0:39 / /run/user/112 rw,nosuid,nodev,relatime shared:177 master:8 foo:bar - tmpfs tmpfs rw,size=405096k,mode=700,uid=112,gid=116",
   103  			mount: &MountInfo{
   104  				MountID:        225,
   105  				ParentID:       20,
   106  				MajorMinorVer:  "0:39",
   107  				Root:           "/",
   108  				MountPoint:     "/run/user/112",
   109  				Options:        map[string]string{"rw": "", "nosuid": "", "nodev": "", "relatime": ""},
   110  				OptionalFields: map[string]string{"shared": "177", "master": "8"},
   111  				FSType:         "tmpfs",
   112  				Source:         "tmpfs",
   113  				SuperOptions:   map[string]string{"rw": "", "size": "405096k", "mode": "700", "uid": "112", "gid": "116"},
   114  			},
   115  			invalid: false,
   116  		},
   117  		{
   118  			name: "CIFS mounted at /with/a-hyphen",
   119  			s:    "454 29 0:87 / /with/a-hyphen rw,relatime shared:255 - cifs //remote-storage/Path rw,vers=3.1.1,cache=strict,username=user,uid=1000,forceuid,gid=0,noforcegid,addr=127.0.0.1,file_mode=0755,dir_mode=0755,soft,nounix,serverino,mapposix,echo_interval=60,actimeo=1",
   120  			mount: &MountInfo{
   121  				MountID:        454,
   122  				ParentID:       29,
   123  				MajorMinorVer:  "0:87",
   124  				Root:           "/",
   125  				MountPoint:     "/with/a-hyphen",
   126  				Options:        map[string]string{"rw": "", "relatime": ""},
   127  				OptionalFields: map[string]string{"shared": "255"},
   128  				FSType:         "cifs",
   129  				Source:         "//remote-storage/Path",
   130  				SuperOptions:   map[string]string{"rw": "", "vers": "3.1.1", "cache": "strict", "username": "user", "uid": "1000", "forceuid": "", "gid": "0", "noforcegid": "", "addr": "127.0.0.1", "file_mode": "0755", "dir_mode": "0755", "soft": "", "nounix": "", "serverino": "", "mapposix": "", "echo_interval": "60", "actimeo": "1"},
   131  			},
   132  			invalid: false,
   133  		},
   134  		{
   135  			name: "Docker overlay with 10 fields (no optional fields)",
   136  			s:    "137 45 253:2 /lib/docker/overlay2 /var/lib/docker/overlay2 rw,relatime - ext4 /dev/mapper/vg0-lv_var rw,data=ordered",
   137  			mount: &MountInfo{
   138  				MountID:        137,
   139  				ParentID:       45,
   140  				MajorMinorVer:  "253:2",
   141  				Root:           "/lib/docker/overlay2",
   142  				MountPoint:     "/var/lib/docker/overlay2",
   143  				Options:        map[string]string{"rw": "", "relatime": ""},
   144  				OptionalFields: map[string]string{},
   145  				FSType:         "ext4",
   146  				Source:         "/dev/mapper/vg0-lv_var",
   147  				SuperOptions:   map[string]string{"rw": "", "data": "ordered"},
   148  			},
   149  		},
   150  		{
   151  			name: "bind chroot bind mount with 10 fields (no optional fields)",
   152  			s:    "157 47 253:2 /etc/named /var/named/chroot/etc/named rw,relatime - ext4 /dev/mapper/vg0-lv_root rw,data=ordered",
   153  			mount: &MountInfo{
   154  				MountID:        157,
   155  				ParentID:       47,
   156  				MajorMinorVer:  "253:2",
   157  				Root:           "/etc/named",
   158  				MountPoint:     "/var/named/chroot/etc/named",
   159  				Options:        map[string]string{"rw": "", "relatime": ""},
   160  				OptionalFields: map[string]string{},
   161  				FSType:         "ext4",
   162  				Source:         "/dev/mapper/vg0-lv_root",
   163  				SuperOptions:   map[string]string{"rw": "", "data": "ordered"},
   164  			},
   165  		},
   166  	}
   167  
   168  	for i, test := range tests {
   169  		t.Logf("[%02d] test %q", i, test.name)
   170  
   171  		mount, err := parseMountInfoString(test.s)
   172  
   173  		if test.invalid && err == nil {
   174  			t.Error("expected an error, but none occurred")
   175  		}
   176  		if !test.invalid && err != nil {
   177  			t.Errorf("unexpected error: %v", err)
   178  		}
   179  
   180  		if want, have := test.mount, mount; !reflect.DeepEqual(want, have) {
   181  			t.Errorf("mounts:\nwant:\n%+v\nhave:\n%+v", want, have)
   182  		}
   183  	}
   184  }
   185
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