253 lines
7.6 KiB
Go
253 lines
7.6 KiB
Go
//go:build linux
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// +build linux
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// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package mountinfo
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import (
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"strings"
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"testing"
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)
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// Tests cross device mount verification function, for both failure
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// and success cases.
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func TestCrossDeviceMountPaths(t *testing.T) {
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successCase :=
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`/dev/0 /path/to/0/1 type0 flags 0 0
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/dev/1 /path/to/1 type1 flags 1 1
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/dev/2 /path/to/1/2 type2 flags,1,2=3 2 2
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/dev/3 /path/to/1.1 type3 falgs,1,2=3 3 3
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`
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dir, err := ioutil.TempDir("", "TestReadProcmountInfos")
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if err != nil {
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t.Fatal(err)
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}
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defer os.RemoveAll(dir)
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mountsPath := filepath.Join(dir, "mounts")
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if err = ioutil.WriteFile(mountsPath, []byte(successCase), 0666); err != nil {
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t.Fatal(err)
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}
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// Failure case where we detected successfully cross device mounts.
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{
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var absPaths = []string{"/path/to/1"}
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if err = checkCrossDevice(absPaths, mountsPath); err == nil {
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t.Fatal("Expected to fail, but found success")
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}
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mp := []mountInfo{
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{"/dev/2", "/path/to/1/2", "type2", []string{"flags"}, "2", "2"},
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}
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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)
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if err.Error() != msg {
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t.Fatalf("Expected msg %s, got %s", msg, err)
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}
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}
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// Failure case when input path is not absolute.
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{
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var absPaths = []string{"."}
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if err = checkCrossDevice(absPaths, mountsPath); err == nil {
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t.Fatal("Expected to fail for non absolute paths")
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}
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expectedErrMsg := fmt.Sprintf("Invalid argument, path (%s) is expected to be absolute", ".")
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if err.Error() != expectedErrMsg {
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t.Fatalf("Expected %s, got %s", expectedErrMsg, err)
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}
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}
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// Success case, where path doesn't have any mounts.
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{
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var absPaths = []string{"/path/to/x"}
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if err = checkCrossDevice(absPaths, mountsPath); err != nil {
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t.Fatalf("Expected success, failed instead (%s)", err)
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}
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}
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}
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// Tests cross device mount verification function, for both failure
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// and success cases.
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func TestCrossDeviceMount(t *testing.T) {
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successCase :=
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`/dev/0 /path/to/0/1 type0 flags 0 0
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/dev/1 /path/to/1 type1 flags 1 1
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/dev/2 /path/to/1/2 type2 flags,1,2=3 2 2
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/dev/3 /path/to/1.1 type3 falgs,1,2=3 3 3
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`
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dir, err := ioutil.TempDir("", "TestReadProcmountInfos")
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if err != nil {
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t.Fatal(err)
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}
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defer os.RemoveAll(dir)
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mountsPath := filepath.Join(dir, "mounts")
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if err = ioutil.WriteFile(mountsPath, []byte(successCase), 0666); err != nil {
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t.Fatal(err)
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}
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mounts, err := readProcMounts(mountsPath)
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if err != nil {
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t.Fatal(err)
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}
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// Failure case where we detected successfully cross device mounts.
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{
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if err = mounts.checkCrossMounts("/path/to/1"); err == nil {
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t.Fatal("Expected to fail, but found success")
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}
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mp := []mountInfo{
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{"/dev/2", "/path/to/1/2", "type2", []string{"flags"}, "2", "2"},
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}
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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)
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if err.Error() != msg {
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t.Fatalf("Expected msg %s, got %s", msg, err)
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}
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}
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// Failure case when input path is not absolute.
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{
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if err = mounts.checkCrossMounts("."); err == nil {
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t.Fatal("Expected to fail for non absolute paths")
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}
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expectedErrMsg := fmt.Sprintf("Invalid argument, path (%s) is expected to be absolute", ".")
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if err.Error() != expectedErrMsg {
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t.Fatalf("Expected %s, got %s", expectedErrMsg, err)
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}
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}
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// Success case, where path doesn't have any mounts.
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{
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if err = mounts.checkCrossMounts("/path/to/x"); err != nil {
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t.Fatalf("Expected success, failed instead (%s)", err)
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}
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}
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}
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// Tests read proc mounts file.
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func TestReadProcmountInfos(t *testing.T) {
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successCase :=
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`/dev/0 /path/to/0 type0 flags 0 0
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/dev/1 /path/to/1 type1 flags 1 1
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/dev/2 /path/to/2 type2 flags,1,2=3 2 2
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`
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dir, err := ioutil.TempDir("", "TestReadProcmountInfos")
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if err != nil {
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t.Fatal(err)
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}
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defer os.RemoveAll(dir)
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mountsPath := filepath.Join(dir, "mounts")
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if err = ioutil.WriteFile(mountsPath, []byte(successCase), 0666); err != nil {
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t.Fatal(err)
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}
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// Verifies if reading each line worked properly.
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{
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var mounts mountInfos
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mounts, err = readProcMounts(mountsPath)
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if err != nil {
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t.Fatal(err)
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}
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if len(mounts) != 3 {
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t.Fatalf("expected 3 mounts, got %d", len(mounts))
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}
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mp := mountInfo{"/dev/0", "/path/to/0", "type0", []string{"flags"}, "0", "0"}
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if !mountPointsEqual(mounts[0], mp) {
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t.Errorf("got unexpected MountPoint[0]: %#v", mounts[0])
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}
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mp = mountInfo{"/dev/1", "/path/to/1", "type1", []string{"flags"}, "1", "1"}
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if !mountPointsEqual(mounts[1], mp) {
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t.Errorf("got unexpected mountInfo[1]: %#v", mounts[1])
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}
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mp = mountInfo{"/dev/2", "/path/to/2", "type2", []string{"flags", "1", "2=3"}, "2", "2"}
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if !mountPointsEqual(mounts[2], mp) {
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t.Errorf("got unexpected mountInfo[2]: %#v", mounts[2])
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}
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}
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// Failure case mounts path doesn't exist, if not fail.
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{
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if _, err = readProcMounts(filepath.Join(dir, "non-existent")); err != nil && !os.IsNotExist(err) {
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t.Fatal(err)
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}
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}
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}
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// Tests read proc mounts reader.
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func TestReadProcMountFrom(t *testing.T) {
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successCase :=
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`/dev/0 /path/to/0 type0 flags 0 0
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/dev/1 /path/to/1 type1 flags 1 1
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/dev/2 /path/to/2 type2 flags,1,2=3 2 2
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`
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// Success case, verifies if parsing works properly.
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{
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mounts, err := parseMountFrom(strings.NewReader(successCase))
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if err != nil {
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t.Errorf("expected success")
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}
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if len(mounts) != 3 {
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t.Fatalf("expected 3 mounts, got %d", len(mounts))
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}
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mp := mountInfo{"/dev/0", "/path/to/0", "type0", []string{"flags"}, "0", "0"}
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if !mountPointsEqual(mounts[0], mp) {
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t.Errorf("got unexpected mountInfo[0]: %#v", mounts[0])
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}
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mp = mountInfo{"/dev/1", "/path/to/1", "type1", []string{"flags"}, "1", "1"}
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if !mountPointsEqual(mounts[1], mp) {
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t.Errorf("got unexpected mountInfo[1]: %#v", mounts[1])
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}
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mp = mountInfo{"/dev/2", "/path/to/2", "type2", []string{"flags", "1", "2=3"}, "2", "2"}
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if !mountPointsEqual(mounts[2], mp) {
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t.Errorf("got unexpected mountInfo[2]: %#v", mounts[2])
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}
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}
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// Error cases where parsing fails with invalid Freq and Pass params.
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{
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errorCases := []string{
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"/dev/1 /path/to/mount type flags a 0\n",
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"/dev/2 /path/to/mount type flags 0 b\n",
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}
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for _, ec := range errorCases {
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_, rerr := parseMountFrom(strings.NewReader(ec))
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if rerr == nil {
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t.Errorf("expected error")
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}
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}
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}
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}
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// Helpers for tests.
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// Check if two `mountInfo` are equal.
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func mountPointsEqual(a, b mountInfo) bool {
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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 {
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return false
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}
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return true
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}
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// Checks if two string slices are equal.
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func slicesEqual(a, b []string) bool {
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if len(a) != len(b) {
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return false
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}
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for i := range a {
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if a[i] != b[i] {
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return false
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}
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}
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return true
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}
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