mirror of
https://github.com/zrepl/zrepl.git
synced 2024-12-23 07:28:57 +01:00
297 lines
7.3 KiB
Go
297 lines
7.3 KiB
Go
package zfs
|
|
|
|
import (
|
|
"bytes"
|
|
"context"
|
|
"fmt"
|
|
"os"
|
|
"os/exec"
|
|
"regexp"
|
|
"strings"
|
|
"syscall"
|
|
"testing"
|
|
|
|
"github.com/stretchr/testify/assert"
|
|
|
|
"github.com/zrepl/zrepl/util/chainlock"
|
|
)
|
|
|
|
type mockBatchDestroy struct {
|
|
mtx chainlock.L
|
|
calls []string
|
|
commaUnsupported bool
|
|
undestroyable *regexp.Regexp
|
|
randomerror string
|
|
e2biglen int
|
|
}
|
|
|
|
func (m *mockBatchDestroy) DestroySnapshotsCommaSyntaxSupported(_ context.Context) (bool, error) {
|
|
return !m.commaUnsupported, nil
|
|
}
|
|
|
|
func (m *mockBatchDestroy) Destroy(ctx context.Context, args []string) error {
|
|
defer m.mtx.Lock().Unlock()
|
|
if len(args) != 1 {
|
|
panic("unexpected use of Destroy")
|
|
}
|
|
a := args[0]
|
|
if m.e2biglen > 0 && len(a) > m.e2biglen {
|
|
return &os.PathError{Err: syscall.E2BIG} // TestExcessiveArgumentsResultInE2BIG checks that this errors is produced
|
|
}
|
|
m.calls = append(m.calls, a)
|
|
|
|
var snapnames []string
|
|
if m.commaUnsupported {
|
|
snapnames = append(snapnames, a)
|
|
if strings.Contains(a, ",") {
|
|
return fmt.Errorf("unsupported syntax mock error")
|
|
}
|
|
} else {
|
|
snapnames = append(snapnames, strings.Split(a, ",")...)
|
|
}
|
|
fs, vt, firstsnapname, err := DecomposeVersionString(snapnames[0])
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
if vt != Snapshot {
|
|
panic(vt)
|
|
}
|
|
snapnames[0] = firstsnapname
|
|
|
|
var undestroyable []string
|
|
if m.undestroyable != nil {
|
|
for _, snap := range snapnames {
|
|
if m.undestroyable.MatchString(snap) {
|
|
undestroyable = append(undestroyable, snap)
|
|
}
|
|
}
|
|
}
|
|
if len(undestroyable) > 0 {
|
|
return &DestroySnapshotsError{
|
|
Filesystem: fs,
|
|
Undestroyable: undestroyable,
|
|
Reason: []string{"undestroyable mock with regexp " + m.undestroyable.String()},
|
|
}
|
|
}
|
|
if m.randomerror != "" && strings.Contains(a, m.randomerror) {
|
|
return fmt.Errorf("randomerror")
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func TestBatchDestroySnaps(t *testing.T) {
|
|
|
|
errs := make([]error, 10)
|
|
nilErrs := func() {
|
|
for i := range errs {
|
|
errs[i] = nil
|
|
}
|
|
}
|
|
opsTemplate := []*DestroySnapOp{
|
|
&DestroySnapOp{"zroot/z", "foo", &errs[0]},
|
|
&DestroySnapOp{"zroot/a", "foo", &errs[1]},
|
|
&DestroySnapOp{"zroot/a", "bar", &errs[2]},
|
|
&DestroySnapOp{"zroot/b", "bar", &errs[3]},
|
|
&DestroySnapOp{"zroot/b", "zab", &errs[4]},
|
|
&DestroySnapOp{"zroot/b", "undestroyable", &errs[5]},
|
|
&DestroySnapOp{"zroot/c", "baz", &errs[6]},
|
|
&DestroySnapOp{"zroot/c", "randomerror", &errs[7]},
|
|
&DestroySnapOp{"zroot/c", "bar", &errs[8]},
|
|
&DestroySnapOp{"zroot/d", "blup", &errs[9]},
|
|
}
|
|
|
|
t.Run("single_undestroyable_dataset", func(t *testing.T) {
|
|
nilErrs()
|
|
mock := &mockBatchDestroy{
|
|
commaUnsupported: false,
|
|
undestroyable: regexp.MustCompile(`undestroyable`),
|
|
randomerror: "randomerror",
|
|
}
|
|
|
|
doDestroy(context.TODO(), opsTemplate, mock)
|
|
|
|
assert.NoError(t, errs[0])
|
|
assert.NoError(t, errs[1])
|
|
assert.NoError(t, errs[2])
|
|
assert.NoError(t, errs[3])
|
|
assert.NoError(t, errs[4])
|
|
assert.Error(t, errs[5], "undestroyable")
|
|
assert.NoError(t, errs[6])
|
|
assert.Error(t, errs[7], "randomerror")
|
|
assert.NoError(t, errs[8])
|
|
assert.NoError(t, errs[9])
|
|
|
|
defer mock.mtx.Lock().Unlock()
|
|
assert.Equal(
|
|
t,
|
|
[]string{
|
|
"zroot/a@bar,foo", // reordered snaps in lexicographical order
|
|
"zroot/b@bar,undestroyable,zab",
|
|
"zroot/b@bar,zab", // eliminate undestroyables, try others again
|
|
"zroot/b@undestroyable",
|
|
"zroot/c@bar,baz,randomerror",
|
|
"zroot/c@bar", // fallback to single-snapshot on non DestroyError
|
|
"zroot/c@baz",
|
|
"zroot/c@randomerror",
|
|
"zroot/d@blup",
|
|
"zroot/z@foo", // ordered at last position
|
|
},
|
|
mock.calls,
|
|
)
|
|
})
|
|
|
|
t.Run("all_undestroyable", func(t *testing.T) {
|
|
|
|
opsTemplate := []*DestroySnapOp{
|
|
&DestroySnapOp{"zroot/a", "foo", new(error)},
|
|
&DestroySnapOp{"zroot/a", "bar", new(error)},
|
|
}
|
|
|
|
mock := &mockBatchDestroy{
|
|
commaUnsupported: false,
|
|
undestroyable: regexp.MustCompile(`.*`),
|
|
}
|
|
|
|
doDestroy(context.TODO(), opsTemplate, mock)
|
|
|
|
defer mock.mtx.Lock().Unlock()
|
|
assert.Equal(
|
|
t,
|
|
[]string{
|
|
"zroot/a@bar,foo", // reordered snaps in lexicographical order
|
|
"zroot/a@bar",
|
|
"zroot/a@foo",
|
|
},
|
|
mock.calls,
|
|
)
|
|
})
|
|
|
|
t.Run("comma_syntax_unsupported", func(t *testing.T) {
|
|
nilErrs()
|
|
mock := &mockBatchDestroy{
|
|
commaUnsupported: true,
|
|
undestroyable: regexp.MustCompile(`undestroyable`),
|
|
randomerror: "randomerror",
|
|
}
|
|
|
|
doDestroy(context.TODO(), opsTemplate, mock)
|
|
|
|
assert.NoError(t, errs[0])
|
|
assert.NoError(t, errs[1])
|
|
assert.NoError(t, errs[2])
|
|
assert.NoError(t, errs[3])
|
|
assert.NoError(t, errs[4])
|
|
assert.Error(t, errs[5], "undestroyable")
|
|
assert.NoError(t, errs[6])
|
|
assert.Error(t, errs[7], "randomerror")
|
|
assert.NoError(t, errs[8])
|
|
assert.NoError(t, errs[9])
|
|
|
|
defer mock.mtx.Lock().Unlock()
|
|
assert.Equal(
|
|
t,
|
|
[]string{
|
|
// expect exactly argument order
|
|
"zroot/z@foo",
|
|
"zroot/a@foo",
|
|
"zroot/a@bar",
|
|
"zroot/b@bar",
|
|
"zroot/b@zab",
|
|
"zroot/b@undestroyable",
|
|
"zroot/c@baz",
|
|
"zroot/c@randomerror",
|
|
"zroot/c@bar",
|
|
"zroot/d@blup",
|
|
},
|
|
mock.calls,
|
|
)
|
|
})
|
|
|
|
t.Run("empty_ops", func(t *testing.T) {
|
|
mock := &mockBatchDestroy{}
|
|
doDestroy(context.TODO(), nil, mock)
|
|
defer mock.mtx.Lock().Unlock()
|
|
assert.Empty(t, mock.calls)
|
|
})
|
|
|
|
t.Run("ops_without_snapnames", func(t *testing.T) {
|
|
mock := &mockBatchDestroy{}
|
|
var err error
|
|
ops := []*DestroySnapOp{&DestroySnapOp{"somefs", "", &err}}
|
|
doDestroy(context.TODO(), ops, mock)
|
|
assert.Error(t, err)
|
|
defer mock.mtx.Lock().Unlock()
|
|
assert.Empty(t, mock.calls)
|
|
})
|
|
|
|
t.Run("ops_without_fsnames", func(t *testing.T) {
|
|
mock := &mockBatchDestroy{}
|
|
var err error
|
|
ops := []*DestroySnapOp{&DestroySnapOp{"", "fsname", &err}}
|
|
doDestroy(context.TODO(), ops, mock)
|
|
assert.Error(t, err)
|
|
defer mock.mtx.Lock().Unlock()
|
|
assert.Empty(t, mock.calls)
|
|
})
|
|
|
|
t.Run("splits_up_batches_at_e2big", func(t *testing.T) {
|
|
mock := &mockBatchDestroy{
|
|
e2biglen: 10,
|
|
}
|
|
|
|
var dummy error
|
|
reqs := []*DestroySnapOp{
|
|
// should fit (1111@a,b,c)
|
|
&DestroySnapOp{"1111", "a", &dummy},
|
|
&DestroySnapOp{"1111", "b", &dummy},
|
|
&DestroySnapOp{"1111", "c", &dummy},
|
|
|
|
// should split
|
|
&DestroySnapOp{"2222", "01", &dummy},
|
|
&DestroySnapOp{"2222", "02", &dummy},
|
|
&DestroySnapOp{"2222", "03", &dummy},
|
|
&DestroySnapOp{"2222", "04", &dummy},
|
|
&DestroySnapOp{"2222", "05", &dummy},
|
|
&DestroySnapOp{"2222", "06", &dummy},
|
|
&DestroySnapOp{"2222", "07", &dummy},
|
|
&DestroySnapOp{"2222", "08", &dummy},
|
|
&DestroySnapOp{"2222", "09", &dummy},
|
|
&DestroySnapOp{"2222", "10", &dummy},
|
|
}
|
|
|
|
doDestroy(context.TODO(), reqs, mock)
|
|
|
|
defer mock.mtx.Lock().Unlock()
|
|
assert.Equal(
|
|
t,
|
|
[]string{
|
|
"1111@a,b,c",
|
|
"2222@01,02",
|
|
"2222@03",
|
|
"2222@04,05",
|
|
"2222@06,07",
|
|
"2222@08",
|
|
"2222@09,10",
|
|
},
|
|
mock.calls,
|
|
)
|
|
|
|
})
|
|
|
|
}
|
|
|
|
func TestExcessiveArgumentsResultInE2BIG(t *testing.T) {
|
|
// FIXME dynamic value
|
|
const maxArgumentLength = 1 << 20 // higher than any OS we know, should always fail
|
|
t.Logf("maxArgumentLength=%v", maxArgumentLength)
|
|
maxArg := bytes.Repeat([]byte("a"), maxArgumentLength)
|
|
cmd := exec.Command("/bin/sh", "-c", "echo -n $1; echo -n $2", "cmdname", string(maxArg), string(maxArg))
|
|
output, err := cmd.CombinedOutput()
|
|
if pe, ok := err.(*os.PathError); ok && pe.Err == syscall.E2BIG {
|
|
t.Logf("ok, system returns E2BIG")
|
|
} else {
|
|
t.Errorf("system did not return E2BIG, but err=%T: %v ", err, err)
|
|
t.Logf("output:\n%s", output)
|
|
}
|
|
}
|