/
mountinfo_linux_test.go
238 lines (225 loc) · 7.33 KB
/
mountinfo_linux_test.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
//go:build linux
// +build linux
// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package mountinfo
import (
"fmt"
"os"
"path/filepath"
"strings"
"testing"
)
// Tests cross device mount verification function, for both failure
// and success cases.
func TestCrossDeviceMountPaths(t *testing.T) {
successCase := `/dev/0 /path/to/0/1 type0 flags 0 0
/dev/1 /path/to/1 type1 flags 1 1
/dev/2 /path/to/1/2 type2 flags,1,2=3 2 2
/dev/3 /path/to/1.1 type3 flags,1,2=3 3 3
`
var err error
dir := t.TempDir()
mountsPath := filepath.Join(dir, "mounts")
if err = os.WriteFile(mountsPath, []byte(successCase), 0o666); err != nil {
t.Fatal(err)
}
// Failure case where we detected successfully cross device mounts.
{
absPaths := []string{"/path/to/1"}
if err = checkCrossDevice(absPaths, mountsPath); err == nil {
t.Fatal("Expected to fail, but found success")
}
mp := []mountInfo{
{"/dev/2", "/path/to/1/2", "type2", []string{"flags"}, "2", "2"},
}
msg := fmt.Sprintf("Cross-device mounts detected on path (/path/to/1) at following locations %s. Export path should not have any sub-mounts, refusing to start.", mp)
if err.Error() != msg {
t.Fatalf("Expected msg %s, got %s", msg, err)
}
}
// Failure case when input path is not absolute.
{
absPaths := []string{"."}
if err = checkCrossDevice(absPaths, mountsPath); err == nil {
t.Fatal("Expected to fail for non absolute paths")
}
expectedErrMsg := fmt.Sprintf("Invalid argument, path (%s) is expected to be absolute", ".")
if err.Error() != expectedErrMsg {
t.Fatalf("Expected %s, got %s", expectedErrMsg, err)
}
}
// Success case, where path doesn't have any mounts.
{
absPaths := []string{"/path/to/x"}
if err = checkCrossDevice(absPaths, mountsPath); err != nil {
t.Fatalf("Expected success, failed instead (%s)", err)
}
}
}
// Tests cross device mount verification function, for both failure
// and success cases.
func TestCrossDeviceMount(t *testing.T) {
successCase := `/dev/0 /path/to/0/1 type0 flags 0 0
/dev/1 /path/to/1 type1 flags 1 1
/dev/2 /path/to/1/2 type2 flags,1,2=3 2 2
/dev/3 /path/to/1.1 type3 flags,1,2=3 3 3
`
var err error
dir := t.TempDir()
mountsPath := filepath.Join(dir, "mounts")
if err = os.WriteFile(mountsPath, []byte(successCase), 0o666); err != nil {
t.Fatal(err)
}
mounts, err := readProcMounts(mountsPath)
if err != nil {
t.Fatal(err)
}
// Failure case where we detected successfully cross device mounts.
{
if err = mounts.checkCrossMounts("/path/to/1"); err == nil {
t.Fatal("Expected to fail, but found success")
}
mp := []mountInfo{
{"/dev/2", "/path/to/1/2", "type2", []string{"flags"}, "2", "2"},
}
msg := fmt.Sprintf("Cross-device mounts detected on path (/path/to/1) at following locations %s. Export path should not have any sub-mounts, refusing to start.", mp)
if err.Error() != msg {
t.Fatalf("Expected msg %s, got %s", msg, err)
}
}
// Failure case when input path is not absolute.
{
if err = mounts.checkCrossMounts("."); err == nil {
t.Fatal("Expected to fail for non absolute paths")
}
expectedErrMsg := fmt.Sprintf("Invalid argument, path (%s) is expected to be absolute", ".")
if err.Error() != expectedErrMsg {
t.Fatalf("Expected %s, got %s", expectedErrMsg, err)
}
}
// Success case, where path doesn't have any mounts.
{
if err = mounts.checkCrossMounts("/path/to/x"); err != nil {
t.Fatalf("Expected success, failed instead (%s)", err)
}
}
}
// Tests read proc mounts file.
func TestReadProcmountInfos(t *testing.T) {
successCase := `/dev/0 /path/to/0 type0 flags 0 0
/dev/1 /path/to/1 type1 flags 1 1
/dev/2 /path/to/2 type2 flags,1,2=3 2 2
`
var err error
dir := t.TempDir()
mountsPath := filepath.Join(dir, "mounts")
if err = os.WriteFile(mountsPath, []byte(successCase), 0o666); err != nil {
t.Fatal(err)
}
// Verifies if reading each line worked properly.
{
var mounts mountInfos
mounts, err = readProcMounts(mountsPath)
if err != nil {
t.Fatal(err)
}
if len(mounts) != 3 {
t.Fatalf("expected 3 mounts, got %d", len(mounts))
}
mp := mountInfo{"/dev/0", "/path/to/0", "type0", []string{"flags"}, "0", "0"}
if !mountPointsEqual(mounts[0], mp) {
t.Errorf("got unexpected MountPoint[0]: %#v", mounts[0])
}
mp = mountInfo{"/dev/1", "/path/to/1", "type1", []string{"flags"}, "1", "1"}
if !mountPointsEqual(mounts[1], mp) {
t.Errorf("got unexpected mountInfo[1]: %#v", mounts[1])
}
mp = mountInfo{"/dev/2", "/path/to/2", "type2", []string{"flags", "1", "2=3"}, "2", "2"}
if !mountPointsEqual(mounts[2], mp) {
t.Errorf("got unexpected mountInfo[2]: %#v", mounts[2])
}
}
// Failure case mounts path doesn't exist, if not fail.
{
if _, err = readProcMounts(filepath.Join(dir, "non-existent")); err != nil && !os.IsNotExist(err) {
t.Fatal(err)
}
}
}
// Tests read proc mounts reader.
func TestReadProcMountFrom(t *testing.T) {
successCase := `/dev/0 /path/to/0 type0 flags 0 0
/dev/1 /path/to/1 type1 flags 1 1
/dev/2 /path/to/2 type2 flags,1,2=3 2 2
`
// Success case, verifies if parsing works properly.
{
mounts, err := parseMountFrom(strings.NewReader(successCase))
if err != nil {
t.Errorf("expected success")
}
if len(mounts) != 3 {
t.Fatalf("expected 3 mounts, got %d", len(mounts))
}
mp := mountInfo{"/dev/0", "/path/to/0", "type0", []string{"flags"}, "0", "0"}
if !mountPointsEqual(mounts[0], mp) {
t.Errorf("got unexpected mountInfo[0]: %#v", mounts[0])
}
mp = mountInfo{"/dev/1", "/path/to/1", "type1", []string{"flags"}, "1", "1"}
if !mountPointsEqual(mounts[1], mp) {
t.Errorf("got unexpected mountInfo[1]: %#v", mounts[1])
}
mp = mountInfo{"/dev/2", "/path/to/2", "type2", []string{"flags", "1", "2=3"}, "2", "2"}
if !mountPointsEqual(mounts[2], mp) {
t.Errorf("got unexpected mountInfo[2]: %#v", mounts[2])
}
}
// Error cases where parsing fails with invalid Freq and Pass params.
{
errorCases := []string{
"/dev/1 /path/to/mount type flags a 0\n",
"/dev/2 /path/to/mount type flags 0 b\n",
}
for _, ec := range errorCases {
_, rerr := parseMountFrom(strings.NewReader(ec))
if rerr == nil {
t.Errorf("expected error")
}
}
}
}
// Helpers for tests.
// Check if two `mountInfo` are equal.
func mountPointsEqual(a, b mountInfo) bool {
if a.Device != b.Device || a.Path != b.Path || a.FSType != b.FSType || !slicesEqual(a.Options, b.Options) || a.Pass != b.Pass || a.Freq != b.Freq {
return false
}
return true
}
// Checks if two string slices are equal.
func slicesEqual(a, b []string) bool {
if len(a) != len(b) {
return false
}
for i := range a {
if a[i] != b[i] {
return false
}
}
return true
}