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//go:build linux
// +build linux
package quota // import "github.com/docker/docker/quota"
import (
"io"
"os"
"path/filepath"
"testing"
"gotest.tools/v3/assert"
is "gotest.tools/v3/assert/cmp"
)
// 10MB
const testQuotaSize = 10 * 1024 * 1024
func TestBlockDev(t *testing.T) {
if msg, ok := CanTestQuota(); !ok {
t.Skip(msg)
}
// get sparse xfs test image
imageFileName, err := PrepareQuotaTestImage(t)
if err != nil {
t.Fatal(err)
}
defer os.Remove(imageFileName)
t.Run("testBlockDevQuotaDisabled", WrapMountTest(imageFileName, false, testBlockDevQuotaDisabled))
t.Run("testBlockDevQuotaEnabled", WrapMountTest(imageFileName, true, testBlockDevQuotaEnabled))
t.Run("testSmallerThanQuota", WrapMountTest(imageFileName, true, WrapQuotaTest(testSmallerThanQuota)))
t.Run("testBiggerThanQuota", WrapMountTest(imageFileName, true, WrapQuotaTest(testBiggerThanQuota)))
t.Run("testRetrieveQuota", WrapMountTest(imageFileName, true, WrapQuotaTest(testRetrieveQuota)))
}
func testBlockDevQuotaDisabled(t *testing.T, mountPoint, backingFsDev, testDir string) {
hasSupport, err := hasQuotaSupport(backingFsDev)
assert.NilError(t, err)
assert.Check(t, !hasSupport)
}
func testBlockDevQuotaEnabled(t *testing.T, mountPoint, backingFsDev, testDir string) {
hasSupport, err := hasQuotaSupport(backingFsDev)
assert.NilError(t, err)
assert.Check(t, hasSupport)
}
func testSmallerThanQuota(t *testing.T, ctrl *Control, homeDir, testDir, testSubDir string) {
assert.NilError(t, ctrl.SetQuota(testSubDir, Quota{testQuotaSize}))
smallerThanQuotaFile := filepath.Join(testSubDir, "smaller-than-quota")
assert.NilError(t, os.WriteFile(smallerThanQuotaFile, make([]byte, testQuotaSize/2), 0644))
assert.NilError(t, os.Remove(smallerThanQuotaFile))
}
func testBiggerThanQuota(t *testing.T, ctrl *Control, homeDir, testDir, testSubDir string) {
// Make sure the quota is being enforced
// TODO: When we implement this under EXT4, we need to shed CAP_SYS_RESOURCE, otherwise
// we're able to violate quota without issue
assert.NilError(t, ctrl.SetQuota(testSubDir, Quota{testQuotaSize}))
biggerThanQuotaFile := filepath.Join(testSubDir, "bigger-than-quota")
err := os.WriteFile(biggerThanQuotaFile, make([]byte, testQuotaSize+1), 0644)
assert.Assert(t, is.ErrorContains(err, ""))
if err == io.ErrShortWrite {
assert.NilError(t, os.Remove(biggerThanQuotaFile))
}
}
func testRetrieveQuota(t *testing.T, ctrl *Control, homeDir, testDir, testSubDir string) {
// Validate that we can retrieve quota
assert.NilError(t, ctrl.SetQuota(testSubDir, Quota{testQuotaSize}))
var q Quota
assert.NilError(t, ctrl.GetQuota(testSubDir, &q))
assert.Check(t, is.Equal(uint64(testQuotaSize), q.Size))
}
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