1b3dee951c
super-user-reserved blocks, which otherwise defaults to 5% of the entire disk. Rationale: Reserving a percentage of the volume is generally a neither useful nor desirable feature for volumes that aren't used as root file systems for Linux distributions, since the reserved portion becomes unavailable for non-root users. For containers, the general case is to use the entire volume for data, without running as root. The case where one might want reserved blocks enabled is much rarer.
243 lines
8.5 KiB
Go
243 lines
8.5 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package mount
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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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"runtime"
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"testing"
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fakeexec "k8s.io/utils/exec/testing"
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)
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type ErrorMounter struct {
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*FakeMounter
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errIndex int
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err []error
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}
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func (mounter *ErrorMounter) Mount(source string, target string, fstype string, options []string) error {
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i := mounter.errIndex
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mounter.errIndex++
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if mounter.err != nil && mounter.err[i] != nil {
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return mounter.err[i]
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}
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return mounter.FakeMounter.Mount(source, target, fstype, options)
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}
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type ExecArgs struct {
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command string
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args []string
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output string
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err error
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}
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func TestSafeFormatAndMount(t *testing.T) {
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if runtime.GOOS == "darwin" || runtime.GOOS == "windows" {
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t.Skipf("not supported on GOOS=%s", runtime.GOOS)
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}
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mntDir, err := ioutil.TempDir(os.TempDir(), "mount")
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if err != nil {
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t.Fatalf("failed to create tmp dir: %v", err)
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}
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defer os.RemoveAll(mntDir)
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tests := []struct {
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description string
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fstype string
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mountOptions []string
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execScripts []ExecArgs
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mountErrs []error
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expectedError error
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}{
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{
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description: "Test a read only mount",
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fstype: "ext4",
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mountOptions: []string{"ro"},
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},
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{
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description: "Test a normal mount",
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fstype: "ext4",
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execScripts: []ExecArgs{
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{"fsck", []string{"-a", "/dev/foo"}, "", nil},
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},
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},
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{
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description: "Test 'fsck' fails with exit status 4",
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fstype: "ext4",
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execScripts: []ExecArgs{
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{"fsck", []string{"-a", "/dev/foo"}, "", &fakeexec.FakeExitError{Status: 4}},
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},
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expectedError: fmt.Errorf("'fsck' found errors on device /dev/foo but could not correct them: ."),
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},
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{
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description: "Test 'fsck' fails with exit status 1 (errors found and corrected)",
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fstype: "ext4",
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execScripts: []ExecArgs{
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{"fsck", []string{"-a", "/dev/foo"}, "", &fakeexec.FakeExitError{Status: 1}},
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},
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},
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{
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description: "Test 'fsck' fails with exit status other than 1 and 4 (likely unformatted device)",
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fstype: "ext4",
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execScripts: []ExecArgs{
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{"fsck", []string{"-a", "/dev/foo"}, "", &fakeexec.FakeExitError{Status: 8}},
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},
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},
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{
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description: "Test that 'blkid' is called and fails",
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fstype: "ext4",
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mountErrs: []error{fmt.Errorf("unknown filesystem type '(null)'")},
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execScripts: []ExecArgs{
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{"fsck", []string{"-a", "/dev/foo"}, "", nil},
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{"blkid", []string{"-p", "-s", "TYPE", "-s", "PTTYPE", "-o", "export", "/dev/foo"}, "DEVNAME=/dev/foo\nTYPE=ext4\n", nil},
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},
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expectedError: fmt.Errorf("unknown filesystem type '(null)'"),
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},
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{
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description: "Test that 'blkid' is called and confirms unformatted disk, format fails",
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fstype: "ext4",
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mountErrs: []error{fmt.Errorf("unknown filesystem type '(null)'")},
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execScripts: []ExecArgs{
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{"fsck", []string{"-a", "/dev/foo"}, "", nil},
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{"blkid", []string{"-p", "-s", "TYPE", "-s", "PTTYPE", "-o", "export", "/dev/foo"}, "", &fakeexec.FakeExitError{Status: 2}},
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{"mkfs.ext4", []string{"-F", "-m0", "/dev/foo"}, "", fmt.Errorf("formatting failed")},
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},
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expectedError: fmt.Errorf("formatting failed"),
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},
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{
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description: "Test that 'blkid' is called and confirms unformatted disk, format passes, second mount fails",
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fstype: "ext4",
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mountErrs: []error{fmt.Errorf("unknown filesystem type '(null)'"), fmt.Errorf("Still cannot mount")},
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execScripts: []ExecArgs{
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{"fsck", []string{"-a", "/dev/foo"}, "", nil},
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{"blkid", []string{"-p", "-s", "TYPE", "-s", "PTTYPE", "-o", "export", "/dev/foo"}, "", &fakeexec.FakeExitError{Status: 2}},
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{"mkfs.ext4", []string{"-F", "-m0", "/dev/foo"}, "", nil},
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},
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expectedError: fmt.Errorf("Still cannot mount"),
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},
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{
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description: "Test that 'blkid' is called and confirms unformatted disk, format passes, second mount passes",
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fstype: "ext4",
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mountErrs: []error{fmt.Errorf("unknown filesystem type '(null)'"), nil},
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execScripts: []ExecArgs{
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{"fsck", []string{"-a", "/dev/foo"}, "", nil},
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{"blkid", []string{"-p", "-s", "TYPE", "-s", "PTTYPE", "-o", "export", "/dev/foo"}, "", &fakeexec.FakeExitError{Status: 2}},
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{"mkfs.ext4", []string{"-F", "-m0", "/dev/foo"}, "", nil},
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},
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expectedError: nil,
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},
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{
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description: "Test that 'blkid' is called and confirms unformatted disk, format passes, second mount passes with ext3",
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fstype: "ext3",
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mountErrs: []error{fmt.Errorf("unknown filesystem type '(null)'"), nil},
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execScripts: []ExecArgs{
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{"fsck", []string{"-a", "/dev/foo"}, "", nil},
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{"blkid", []string{"-p", "-s", "TYPE", "-s", "PTTYPE", "-o", "export", "/dev/foo"}, "", &fakeexec.FakeExitError{Status: 2}},
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{"mkfs.ext3", []string{"-F", "-m0", "/dev/foo"}, "", nil},
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},
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expectedError: nil,
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},
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{
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description: "test that none ext4 fs does not get called with ext4 options.",
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fstype: "xfs",
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mountErrs: []error{fmt.Errorf("unknown filesystem type '(null)'"), nil},
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execScripts: []ExecArgs{
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{"fsck", []string{"-a", "/dev/foo"}, "", nil},
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{"blkid", []string{"-p", "-s", "TYPE", "-s", "PTTYPE", "-o", "export", "/dev/foo"}, "", &fakeexec.FakeExitError{Status: 2}},
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{"mkfs.xfs", []string{"/dev/foo"}, "", nil},
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},
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expectedError: nil,
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},
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{
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description: "Test that 'blkid' is called and reports ext4 partition",
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fstype: "ext3",
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mountErrs: []error{fmt.Errorf("unknown filesystem type '(null)'")},
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execScripts: []ExecArgs{
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{"fsck", []string{"-a", "/dev/foo"}, "", nil},
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{"blkid", []string{"-p", "-s", "TYPE", "-s", "PTTYPE", "-o", "export", "/dev/foo"}, "DEVNAME=/dev/foo\nPTTYPE=dos\n", nil},
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},
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expectedError: fmt.Errorf("failed to mount the volume as \"ext3\", it already contains unknown data, probably partitions. Mount error: unknown filesystem type '(null)'"),
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},
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{
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description: "Test that 'blkid' is called but has some usage or other errors (an exit code of 4 is returned)",
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fstype: "xfs",
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mountErrs: []error{fmt.Errorf("unknown filesystem type '(null)'"), nil},
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execScripts: []ExecArgs{
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{"fsck", []string{"-a", "/dev/foo"}, "", nil},
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{"blkid", []string{"-p", "-s", "TYPE", "-s", "PTTYPE", "-o", "export", "/dev/foo"}, "", &fakeexec.FakeExitError{Status: 4}},
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{"mkfs.xfs", []string{"/dev/foo"}, "", nil},
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},
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expectedError: fmt.Errorf("exit 4"),
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},
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}
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for _, test := range tests {
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execCallCount := 0
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execCallback := func(cmd string, args ...string) ([]byte, error) {
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if len(test.execScripts) <= execCallCount {
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t.Errorf("Unexpected command: %s %v", cmd, args)
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return nil, nil
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}
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script := test.execScripts[execCallCount]
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execCallCount++
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if script.command != cmd {
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t.Errorf("Unexpected command %s. Expecting %s", cmd, script.command)
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}
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for j := range args {
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if args[j] != script.args[j] {
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t.Errorf("Unexpected args %v. Expecting %v", args, script.args)
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}
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}
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return []byte(script.output), script.err
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}
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fakeMounter := ErrorMounter{&FakeMounter{}, 0, test.mountErrs}
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fakeExec := NewFakeExec(execCallback)
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mounter := SafeFormatAndMount{
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Interface: &fakeMounter,
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Exec: fakeExec,
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}
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device := "/dev/foo"
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dest := mntDir
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err := mounter.FormatAndMount(device, dest, test.fstype, test.mountOptions)
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if test.expectedError == nil {
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if err != nil {
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t.Errorf("test \"%s\" unexpected non-error: %v", test.description, err)
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}
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// Check that something was mounted on the directory
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isNotMountPoint, err := fakeMounter.IsLikelyNotMountPoint(dest)
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if err != nil || isNotMountPoint {
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t.Errorf("test \"%s\" the directory was not mounted", test.description)
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}
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//check that the correct device was mounted
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mountedDevice, _, err := GetDeviceNameFromMount(fakeMounter.FakeMounter, dest)
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if err != nil || mountedDevice != device {
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t.Errorf("test \"%s\" the correct device was not mounted", test.description)
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}
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} else {
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if err == nil || test.expectedError.Error() != err.Error() {
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t.Errorf("test \"%s\" unexpected error: \n [%v]. \nExpecting [%v]", test.description, err, test.expectedError)
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}
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}
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}
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}
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