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/* | ||
Copyright The containerd 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. | ||
*/ | ||
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package main | ||
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import ( | ||
"fmt" | ||
"os" | ||
"path/filepath" | ||
"testing" | ||
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"gotest.tools/v3/assert" | ||
"gotest.tools/v3/icmd" | ||
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"github.com/containerd/nerdctl/v2/pkg/containerutil" | ||
"github.com/containerd/nerdctl/v2/pkg/rootlessutil" | ||
"github.com/containerd/nerdctl/v2/pkg/testutil" | ||
) | ||
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// This is a separate set of tests for cp specifically meant to test corner or extreme cases that do not fit in the normal testing rig | ||
// because of their complexity | ||
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func TestAcidCopy(t *testing.T) { | ||
t.Parallel() | ||
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t.Run("Travelling along volumes w/o read-only", func(t *testing.T) { | ||
t.Parallel() | ||
testID := testutil.Identifier(t) | ||
tempDir := t.TempDir() | ||
base := testutil.NewBase(t) | ||
base.Dir = tempDir | ||
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sourceFile := filepath.Join(tempDir, "hostfile") | ||
sourceFileContent := []byte(testID) | ||
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roContainer := testID + "-ro" | ||
rwContainer := testID + "-rw" | ||
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setup := func() { | ||
base.Cmd("volume", "create", testID+"-1-ro").AssertOK() | ||
base.Cmd("volume", "create", testID+"-2-rw").AssertOK() | ||
base.Cmd("volume", "create", testID+"-3-rw").AssertOK() | ||
base.Cmd("run", "-d", "-w", containerCwd, "--name", roContainer, "--read-only", | ||
"-v", fmt.Sprintf("%s:%s:ro", testID+"-1-ro", "/vol1/dir1/ro"), | ||
"-v", fmt.Sprintf("%s:%s", testID+"-2-rw", "/vol2/dir2/rw"), | ||
testutil.CommonImage, "sleep", "Inf", | ||
).AssertOK() | ||
base.Cmd("run", "-d", "-w", containerCwd, "--name", rwContainer, | ||
"-v", fmt.Sprintf("%s:%s:ro", testID+"-1-ro", "/vol1/dir1/ro"), | ||
"-v", fmt.Sprintf("%s:%s", testID+"-3-rw", "/vol3/dir3/rw"), | ||
testutil.CommonImage, "sleep", "Inf", | ||
).AssertOK() | ||
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base.Cmd("exec", rwContainer, "sh", "-euxc", "cd /vol3/dir3/rw; ln -s ../../../ relativelinktoroot").AssertOK() | ||
base.Cmd("exec", rwContainer, "sh", "-euxc", "cd /vol3/dir3/rw; ln -s / absolutelinktoroot").AssertOK() | ||
base.Cmd("exec", roContainer, "sh", "-euxc", "cd /vol2/dir2/rw; ln -s ../../../ relativelinktoroot").AssertOK() | ||
base.Cmd("exec", roContainer, "sh", "-euxc", "cd /vol2/dir2/rw; ln -s / absolutelinktoroot").AssertOK() | ||
// Create file on the host | ||
err := os.WriteFile(sourceFile, sourceFileContent, filePerm) | ||
assert.NilError(t, err) | ||
} | ||
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tearDown := func() { | ||
base.Cmd("rm", "-f", roContainer).Run() | ||
base.Cmd("rm", "-f", rwContainer).Run() | ||
base.Cmd("volume", "rm", testID+"-1-ro").Run() | ||
base.Cmd("volume", "rm", testID+"-2-rw").Run() | ||
base.Cmd("volume", "rm", testID+"-3-rw").Run() | ||
} | ||
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t.Cleanup(tearDown) | ||
tearDown() | ||
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setup() | ||
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expectedErr := containerutil.ErrTargetIsReadOnly.Error() | ||
if testutil.GetTarget() == testutil.Docker { | ||
expectedErr = "" | ||
} | ||
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t.Run("Cannot copy into a read-only root", func(t *testing.T) { | ||
t.Parallel() | ||
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base.Cmd("cp", sourceFile, roContainer+":/").Assert(icmd.Expected{ | ||
ExitCode: 1, | ||
Err: expectedErr, | ||
}) | ||
}) | ||
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t.Run("Cannot copy into a read-only mount, in a rw container", func(t *testing.T) { | ||
t.Parallel() | ||
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base.Cmd("cp", sourceFile, rwContainer+":/vol1/dir1/ro").Assert(icmd.Expected{ | ||
ExitCode: 1, | ||
Err: expectedErr, | ||
}) | ||
}) | ||
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t.Run("Can copy into a read-write mount in a read-only container", func(t *testing.T) { | ||
t.Parallel() | ||
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base.Cmd("cp", sourceFile, roContainer+":/vol2/dir2/rw").Assert(icmd.Expected{ | ||
ExitCode: 0, | ||
}) | ||
}) | ||
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t.Run("Traverse read-only locations to a read-write location", func(t *testing.T) { | ||
t.Parallel() | ||
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base.Cmd("cp", sourceFile, roContainer+":/vol1/dir1/ro/../../../vol2/dir2/rw").Assert(icmd.Expected{ | ||
ExitCode: 0, | ||
}) | ||
}) | ||
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t.Run("Follow an absolute symlink inside a read-write mount to a read-only root", func(t *testing.T) { | ||
t.Parallel() | ||
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base.Cmd("cp", sourceFile, roContainer+":/vol2/dir2/rw/absolutelinktoroot").Assert(icmd.Expected{ | ||
ExitCode: 1, | ||
Err: expectedErr, | ||
}) | ||
}) | ||
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t.Run("Follow am absolute symlink inside a read-write mount to a read-only mount", func(t *testing.T) { | ||
t.Parallel() | ||
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base.Cmd("cp", sourceFile, rwContainer+":/vol3/dir3/rw/absolutelinktoroot/vol1/dir1/ro").Assert(icmd.Expected{ | ||
ExitCode: 1, | ||
Err: expectedErr, | ||
}) | ||
}) | ||
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t.Run("Follow a relative symlink inside a read-write location to a read-only root", func(t *testing.T) { | ||
t.Parallel() | ||
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base.Cmd("cp", sourceFile, roContainer+":/vol2/dir2/rw/relativelinktoroot").Assert(icmd.Expected{ | ||
ExitCode: 1, | ||
Err: expectedErr, | ||
}) | ||
}) | ||
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t.Run("Follow a relative symlink inside a read-write location to a read-only mount", func(t *testing.T) { | ||
t.Parallel() | ||
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base.Cmd("cp", sourceFile, rwContainer+":/vol3/dir3/rw/relativelinktoroot/vol1/dir1/ro").Assert(icmd.Expected{ | ||
ExitCode: 1, | ||
Err: expectedErr, | ||
}) | ||
}) | ||
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t.Run("Cannot copy into a HOST read-only location", func(t *testing.T) { | ||
t.Parallel() | ||
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if !rootlessutil.IsRootless() { | ||
t.Skip("This test does not work rootful right now") | ||
} | ||
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err := os.MkdirAll(filepath.Join(tempDir, "rotest"), 0o000) | ||
assert.NilError(t, err) | ||
base.Cmd("cp", roContainer+":/etc/issue", filepath.Join(tempDir, "rotest")).Assert(icmd.Expected{ | ||
ExitCode: 1, | ||
Err: expectedErr, | ||
}) | ||
}) | ||
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}) | ||
} |
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