| 1 | //go:build linux |
| 2 | |
| 3 | package provisioner |
| 4 | |
| 5 | import ( |
| 6 | "bytes" |
| 7 | "os" |
| 8 | "os/exec" |
| 9 | "path/filepath" |
| 10 | "testing" |
| 11 | ) |
| 12 | |
| 13 | func persistentDirectory(t *testing.T) string { |
| 14 | t.Helper() |
| 15 | // The native backend deliberately rejects /tmp when it is tmpfs. Exercise |
| 16 | // durable operations on this checkout's persistent filesystem instead. |
| 17 | path, err := os.MkdirTemp(".", ".provisioner-test-") |
| 18 | if err != nil { |
| 19 | t.Fatal(err) |
| 20 | } |
| 21 | path, err = filepath.Abs(path) |
| 22 | if err != nil { |
| 23 | t.Fatal(err) |
| 24 | } |
| 25 | t.Cleanup(func() { os.RemoveAll(path) }) |
| 26 | if err = os.Chmod(path, 0700); err != nil { |
| 27 | t.Fatal(err) |
| 28 | } |
| 29 | return path |
| 30 | } |
| 31 | func TestNativeStorageExclusiveDurableRecords(t *testing.T) { |
| 32 | path := persistentDirectory(t) |
| 33 | d, err := openPrivateDirectory(path) |
| 34 | if err != nil { |
| 35 | t.Fatal("native filesystem required", err) |
| 36 | } |
| 37 | body := []byte("synthetic signed record") |
| 38 | if err = d.create("00000001", body); err != nil { |
| 39 | t.Fatal(err) |
| 40 | } |
| 41 | if err = d.create("00000001", []byte("replacement")); err != ErrRefused { |
| 42 | t.Fatal("immutable record replaced", err) |
| 43 | } |
| 44 | d.close() |
| 45 | d, err = openPrivateDirectory(path) |
| 46 | if err != nil { |
| 47 | t.Fatal(err) |
| 48 | } |
| 49 | defer d.close() |
| 50 | got, err := d.read("00000001", 128) |
| 51 | if err != nil || !bytes.Equal(got, body) { |
| 52 | t.Fatal("durable reopen", err) |
| 53 | } |
| 54 | if _, err = d.read("00000001", 2); err != ErrRefused { |
| 55 | t.Fatal("unbounded read", err) |
| 56 | } |
| 57 | if err = os.Link(filepath.Join(path, "00000001"), filepath.Join(path, "alias")); err != nil { |
| 58 | t.Fatal(err) |
| 59 | } |
| 60 | if _, err = d.read("00000001", 128); err != ErrRefused { |
| 61 | t.Fatal("hardlink accepted", err) |
| 62 | } |
| 63 | } |
| 64 | func TestNativeStorageRefusesSymlinksAndPermissions(t *testing.T) { |
| 65 | path := persistentDirectory(t) |
| 66 | real := filepath.Join(path, "real") |
| 67 | if err := os.Mkdir(real, 0700); err != nil { |
| 68 | t.Fatal(err) |
| 69 | } |
| 70 | alias := filepath.Join(path, "alias") |
| 71 | if err := os.Symlink(real, alias); err != nil { |
| 72 | t.Fatal(err) |
| 73 | } |
| 74 | if _, err := openPrivateDirectory(alias); err != ErrRefused { |
| 75 | t.Fatal("symlink directory", err) |
| 76 | } |
| 77 | if err := os.Mkdir(filepath.Join(real, "nested"), 0700); err != nil { |
| 78 | t.Fatal(err) |
| 79 | } |
| 80 | if _, err := openPrivateDirectory(filepath.Join(alias, "nested")); err != ErrRefused { |
| 81 | t.Fatal("symlink ancestor", err) |
| 82 | } |
| 83 | d, err := openPrivateDirectory(real) |
| 84 | if err != nil { |
| 85 | t.Fatal(err) |
| 86 | } |
| 87 | defer d.close() |
| 88 | if err = os.Symlink("target", filepath.Join(real, "record")); err != nil { |
| 89 | t.Fatal(err) |
| 90 | } |
| 91 | if err = d.create("record", []byte("x")); err != ErrRefused { |
| 92 | t.Fatal("followed record symlink", err) |
| 93 | } |
| 94 | if _, err = d.read("record", 128); err != ErrRefused { |
| 95 | t.Fatal("read record symlink", err) |
| 96 | } |
| 97 | if err = os.Chmod(real, 0755); err != nil { |
| 98 | t.Fatal(err) |
| 99 | } |
| 100 | if _, err = openPrivateDirectory(real); err != ErrRefused { |
| 101 | t.Fatal("public directory", err) |
| 102 | } |
| 103 | } |
| 104 | func TestNativeStorageProcessLock(t *testing.T) { |
| 105 | if path := os.Getenv("OFICINA_TEST_LOCK_PATH"); path != "" { |
| 106 | d, err := openPrivateDirectory(path) |
| 107 | if err != nil { |
| 108 | t.Fatal(err) |
| 109 | } |
| 110 | defer d.close() |
| 111 | lock, err := d.lock() |
| 112 | if lock != nil { |
| 113 | lock.Close() |
| 114 | } |
| 115 | if err != ErrRefused { |
| 116 | t.Fatal("second process acquired lock", err) |
| 117 | } |
| 118 | return |
| 119 | } |
| 120 | path := persistentDirectory(t) |
| 121 | d, err := openPrivateDirectory(path) |
| 122 | if err != nil { |
| 123 | t.Fatal(err) |
| 124 | } |
| 125 | defer d.close() |
| 126 | lock, err := d.lock() |
| 127 | if err != nil { |
| 128 | t.Fatal(err) |
| 129 | } |
| 130 | cmd := exec.Command(os.Args[0], "-test.run=^TestNativeStorageProcessLock$") |
| 131 | cmd.Env = append(os.Environ(), "OFICINA_TEST_LOCK_PATH="+path) |
| 132 | if output, err := cmd.CombinedOutput(); err != nil { |
| 133 | t.Fatalf("child: %s: %v", output, err) |
| 134 | } |
| 135 | lock.Close() |
| 136 | lock, err = d.lock() |
| 137 | if err != nil { |
| 138 | t.Fatal("lock did not release", err) |
| 139 | } |
| 140 | lock.Close() |
| 141 | } |
| 142 | |
amadan