sdk/go/arvados/collection_fs_test.go

   1 // Copyright (C) The Arvados Authors. All rights reserved.
   2 //
   3 // SPDX-License-Identifier: Apache-2.0
   4
   5 package arvados
   6
   7 import (
   8         "bytes"
   9         "crypto/md5"
  10         "errors"
  11         "fmt"
  12         "io"
  13         "io/ioutil"
  14         "math/rand"
  15         "net/http"
  16         "os"
  17         "regexp"
  18         "runtime"
  19         "sync"
  20         "testing"
  21         "time"
  22
  23         "git.curoverse.com/arvados.git/sdk/go/arvadostest"
  24         check "gopkg.in/check.v1"
  25 )
  26
  27 var _ = check.Suite(&CollectionFSSuite{})
  28
  29 type keepClientStub struct {
  30         blocks map[string][]byte
  31         sync.RWMutex
  32 }
  33
  34 var errStub404 = errors.New("404 block not found")
  35
  36 func (kcs *keepClientStub) ReadAt(locator string, p []byte, off int) (int, error) {
  37         kcs.RLock()
  38         defer kcs.RUnlock()
  39         buf := kcs.blocks[locator[:32]]
  40         if buf == nil {
  41                 return 0, errStub404
  42         }
  43         return copy(p, buf[off:]), nil
  44 }
  45
  46 func (kcs *keepClientStub) PutB(p []byte) (string, int, error) {
  47         locator := fmt.Sprintf("%x+%d+A12345@abcde", md5.Sum(p), len(p))
  48         buf := make([]byte, len(p))
  49         copy(buf, p)
  50         kcs.Lock()
  51         defer kcs.Unlock()
  52         kcs.blocks[locator[:32]] = buf
  53         return locator, 1, nil
  54 }
  55
  56 type CollectionFSSuite struct {
  57         client *Client
  58         coll   Collection
  59         fs     CollectionFileSystem
  60         kc     keepClient
  61 }
  62
  63 func (s *CollectionFSSuite) SetUpTest(c *check.C) {
  64         s.client = NewClientFromEnv()
  65         err := s.client.RequestAndDecode(&s.coll, "GET", "arvados/v1/collections/"+arvadostest.FooAndBarFilesInDirUUID, nil, nil)
  66         c.Assert(err, check.IsNil)
  67         s.kc = &keepClientStub{
  68                 blocks: map[string][]byte{
  69                         "3858f62230ac3c915f300c664312c63f": []byte("foobar"),
  70                 }}
  71         s.fs, err = s.coll.FileSystem(s.client, s.kc)
  72         c.Assert(err, check.IsNil)
  73 }
  74
  75 func (s *CollectionFSSuite) TestHttpFileSystemInterface(c *check.C) {
  76         _, ok := s.fs.(http.FileSystem)
  77         c.Check(ok, check.Equals, true)
  78 }
  79
  80 func (s *CollectionFSSuite) TestReaddirFull(c *check.C) {
  81         f, err := s.fs.Open("/dir1")
  82         c.Assert(err, check.IsNil)
  83
  84         st, err := f.Stat()
  85         c.Assert(err, check.IsNil)
  86         c.Check(st.Size(), check.Equals, int64(2))
  87         c.Check(st.IsDir(), check.Equals, true)
  88
  89         fis, err := f.Readdir(0)
  90         c.Check(err, check.IsNil)
  91         c.Check(len(fis), check.Equals, 2)
  92         if len(fis) > 0 {
  93                 c.Check(fis[0].Size(), check.Equals, int64(3))
  94         }
  95 }
  96
  97 func (s *CollectionFSSuite) TestReaddirLimited(c *check.C) {
  98         f, err := s.fs.Open("./dir1")
  99         c.Assert(err, check.IsNil)
 100
 101         fis, err := f.Readdir(1)
 102         c.Check(err, check.IsNil)
 103         c.Check(len(fis), check.Equals, 1)
 104         if len(fis) > 0 {
 105                 c.Check(fis[0].Size(), check.Equals, int64(3))
 106         }
 107
 108         fis, err = f.Readdir(1)
 109         c.Check(err, check.IsNil)
 110         c.Check(len(fis), check.Equals, 1)
 111         if len(fis) > 0 {
 112                 c.Check(fis[0].Size(), check.Equals, int64(3))
 113         }
 114
 115         fis, err = f.Readdir(1)
 116         c.Check(len(fis), check.Equals, 0)
 117         c.Check(err, check.NotNil)
 118         c.Check(err, check.Equals, io.EOF)
 119
 120         f, err = s.fs.Open("dir1")
 121         c.Assert(err, check.IsNil)
 122         fis, err = f.Readdir(1)
 123         c.Check(len(fis), check.Equals, 1)
 124         c.Assert(err, check.IsNil)
 125         fis, err = f.Readdir(2)
 126         c.Check(len(fis), check.Equals, 1)
 127         c.Assert(err, check.IsNil)
 128         fis, err = f.Readdir(2)
 129         c.Check(len(fis), check.Equals, 0)
 130         c.Assert(err, check.Equals, io.EOF)
 131 }
 132
 133 func (s *CollectionFSSuite) TestPathMunge(c *check.C) {
 134         for _, path := range []string{".", "/", "./", "///", "/../", "/./.."} {
 135                 f, err := s.fs.Open(path)
 136                 c.Assert(err, check.IsNil)
 137
 138                 st, err := f.Stat()
 139                 c.Assert(err, check.IsNil)
 140                 c.Check(st.Size(), check.Equals, int64(1))
 141                 c.Check(st.IsDir(), check.Equals, true)
 142         }
 143         for _, path := range []string{"/dir1", "dir1", "./dir1", "///dir1//.//", "../dir1/../dir1/"} {
 144                 c.Logf("%q", path)
 145                 f, err := s.fs.Open(path)
 146                 c.Assert(err, check.IsNil)
 147
 148                 st, err := f.Stat()
 149                 c.Assert(err, check.IsNil)
 150                 c.Check(st.Size(), check.Equals, int64(2))
 151                 c.Check(st.IsDir(), check.Equals, true)
 152         }
 153 }
 154
 155 func (s *CollectionFSSuite) TestNotExist(c *check.C) {
 156         for _, path := range []string{"/no", "no", "./no", "n/o", "/n/o"} {
 157                 f, err := s.fs.Open(path)
 158                 c.Assert(f, check.IsNil)
 159                 c.Assert(err, check.NotNil)
 160                 c.Assert(os.IsNotExist(err), check.Equals, true)
 161         }
 162 }
 163
 164 func (s *CollectionFSSuite) TestReadOnlyFile(c *check.C) {
 165         f, err := s.fs.OpenFile("/dir1/foo", os.O_RDONLY, 0)
 166         c.Assert(err, check.IsNil)
 167         st, err := f.Stat()
 168         c.Assert(err, check.IsNil)
 169         c.Check(st.Size(), check.Equals, int64(3))
 170         n, err := f.Write([]byte("bar"))
 171         c.Check(n, check.Equals, 0)
 172         c.Check(err, check.Equals, ErrReadOnlyFile)
 173 }
 174
 175 func (s *CollectionFSSuite) TestCreateFile(c *check.C) {
 176         f, err := s.fs.OpenFile("/newfile", os.O_RDWR|os.O_CREATE, 0)
 177         c.Assert(err, check.IsNil)
 178         st, err := f.Stat()
 179         c.Assert(err, check.IsNil)
 180         c.Check(st.Size(), check.Equals, int64(0))
 181
 182         n, err := f.Write([]byte("bar"))
 183         c.Check(n, check.Equals, 3)
 184         c.Check(err, check.IsNil)
 185
 186         c.Check(f.Close(), check.IsNil)
 187
 188         f, err = s.fs.OpenFile("/newfile", os.O_RDWR|os.O_CREATE|os.O_EXCL, 0)
 189         c.Check(f, check.IsNil)
 190         c.Assert(err, check.NotNil)
 191
 192         f, err = s.fs.OpenFile("/newfile", os.O_RDWR, 0)
 193         c.Assert(err, check.IsNil)
 194         st, err = f.Stat()
 195         c.Assert(err, check.IsNil)
 196         c.Check(st.Size(), check.Equals, int64(3))
 197
 198         c.Check(f.Close(), check.IsNil)
 199
 200         // TODO: serialize to Collection, confirm manifest contents,
 201         // make new FileSystem, confirm file contents.
 202 }
 203
 204 func (s *CollectionFSSuite) TestReadWriteFile(c *check.C) {
 205         maxBlockSize = 8
 206         defer func() { maxBlockSize = 2 << 26 }()
 207
 208         f, err := s.fs.OpenFile("/dir1/foo", os.O_RDWR, 0)
 209         c.Assert(err, check.IsNil)
 210         defer f.Close()
 211         st, err := f.Stat()
 212         c.Assert(err, check.IsNil)
 213         c.Check(st.Size(), check.Equals, int64(3))
 214
 215         f2, err := s.fs.OpenFile("/dir1/foo", os.O_RDWR, 0)
 216         c.Assert(err, check.IsNil)
 217         defer f2.Close()
 218
 219         buf := make([]byte, 64)
 220         n, err := f.Read(buf)
 221         c.Check(n, check.Equals, 3)
 222         c.Check(err, check.Equals, io.EOF)
 223         c.Check(string(buf[:3]), check.DeepEquals, "foo")
 224
 225         pos, err := f.Seek(-2, os.SEEK_CUR)
 226         c.Check(pos, check.Equals, int64(1))
 227         c.Check(err, check.IsNil)
 228
 229         // Split a storedExtent in two, and insert a memExtent
 230         n, err = f.Write([]byte("*"))
 231         c.Check(n, check.Equals, 1)
 232         c.Check(err, check.IsNil)
 233
 234         pos, err = f.Seek(0, os.SEEK_CUR)
 235         c.Check(pos, check.Equals, int64(2))
 236         c.Check(err, check.IsNil)
 237
 238         pos, err = f.Seek(0, os.SEEK_SET)
 239         c.Check(pos, check.Equals, int64(0))
 240         c.Check(err, check.IsNil)
 241
 242         rbuf, err := ioutil.ReadAll(f)
 243         c.Check(len(rbuf), check.Equals, 3)
 244         c.Check(err, check.IsNil)
 245         c.Check(string(rbuf), check.Equals, "f*o")
 246
 247         // Write multiple blocks in one call
 248         f.Seek(1, os.SEEK_SET)
 249         n, err = f.Write([]byte("0123456789abcdefg"))
 250         c.Check(n, check.Equals, 17)
 251         c.Check(err, check.IsNil)
 252         pos, err = f.Seek(0, os.SEEK_CUR)
 253         c.Check(pos, check.Equals, int64(18))
 254         pos, err = f.Seek(-18, os.SEEK_CUR)
 255         c.Check(err, check.IsNil)
 256         n, err = io.ReadFull(f, buf)
 257         c.Check(n, check.Equals, 18)
 258         c.Check(err, check.Equals, io.ErrUnexpectedEOF)
 259         c.Check(string(buf[:n]), check.Equals, "f0123456789abcdefg")
 260
 261         buf2, err := ioutil.ReadAll(f2)
 262         c.Check(err, check.IsNil)
 263         c.Check(string(buf2), check.Equals, "f0123456789abcdefg")
 264
 265         // truncate to current size
 266         err = f.Truncate(18)
 267         f2.Seek(0, os.SEEK_SET)
 268         buf2, err = ioutil.ReadAll(f2)
 269         c.Check(err, check.IsNil)
 270         c.Check(string(buf2), check.Equals, "f0123456789abcdefg")
 271
 272         // shrink to zero some data
 273         f.Truncate(15)
 274         f2.Seek(0, os.SEEK_SET)
 275         buf2, err = ioutil.ReadAll(f2)
 276         c.Check(err, check.IsNil)
 277         c.Check(string(buf2), check.Equals, "f0123456789abcd")
 278
 279         // grow to partial block/extent
 280         f.Truncate(20)
 281         f2.Seek(0, os.SEEK_SET)
 282         buf2, err = ioutil.ReadAll(f2)
 283         c.Check(err, check.IsNil)
 284         c.Check(string(buf2), check.Equals, "f0123456789abcd\x00\x00\x00\x00\x00")
 285
 286         f.Truncate(0)
 287         f2.Seek(0, os.SEEK_SET)
 288         f2.Write([]byte("12345678abcdefghijkl"))
 289
 290         // grow to block/extent boundary
 291         f.Truncate(64)
 292         f2.Seek(0, os.SEEK_SET)
 293         buf2, err = ioutil.ReadAll(f2)
 294         c.Check(err, check.IsNil)
 295         c.Check(len(buf2), check.Equals, 64)
 296         c.Check(len(f.(*file).inode.(*filenode).extents), check.Equals, 8)
 297
 298         // shrink to block/extent boundary
 299         err = f.Truncate(32)
 300         f2.Seek(0, os.SEEK_SET)
 301         buf2, err = ioutil.ReadAll(f2)
 302         c.Check(err, check.IsNil)
 303         c.Check(len(buf2), check.Equals, 32)
 304         c.Check(len(f.(*file).inode.(*filenode).extents), check.Equals, 4)
 305
 306         // shrink to partial block/extent
 307         err = f.Truncate(15)
 308         f2.Seek(0, os.SEEK_SET)
 309         buf2, err = ioutil.ReadAll(f2)
 310         c.Check(err, check.IsNil)
 311         c.Check(string(buf2), check.Equals, "12345678abcdefg")
 312         c.Check(len(f.(*file).inode.(*filenode).extents), check.Equals, 2)
 313
 314         // Force flush to ensure the block "12345678" gets stored, so
 315         // we know what to expect in the final manifest below.
 316         _, err = s.fs.MarshalManifest(".")
 317         c.Check(err, check.IsNil)
 318
 319         // Truncate to size=3 while f2's ptr is at 15
 320         err = f.Truncate(3)
 321         c.Check(err, check.IsNil)
 322         buf2, err = ioutil.ReadAll(f2)
 323         c.Check(err, check.IsNil)
 324         c.Check(string(buf2), check.Equals, "")
 325         f2.Seek(0, os.SEEK_SET)
 326         buf2, err = ioutil.ReadAll(f2)
 327         c.Check(err, check.IsNil)
 328         c.Check(string(buf2), check.Equals, "123")
 329         c.Check(len(f.(*file).inode.(*filenode).extents), check.Equals, 1)
 330
 331         m, err := s.fs.MarshalManifest(".")
 332         c.Check(err, check.IsNil)
 333         m = regexp.MustCompile(`\+A[^\+ ]+`).ReplaceAllLiteralString(m, "")
 334         c.Check(m, check.Equals, "./dir1 3858f62230ac3c915f300c664312c63f+6 25d55ad283aa400af464c76d713c07ad+8 3:3:bar 6:3:foo\n")
 335 }
 336
 337 func (s *CollectionFSSuite) TestSeekSparse(c *check.C) {
 338         fs, err := (&Collection{}).FileSystem(s.client, s.kc)
 339         c.Assert(err, check.IsNil)
 340         f, err := fs.OpenFile("test", os.O_CREATE|os.O_RDWR, 0755)
 341         c.Assert(err, check.IsNil)
 342         defer f.Close()
 343
 344         checkSize := func(size int64) {
 345                 fi, err := f.Stat()
 346                 c.Check(fi.Size(), check.Equals, size)
 347
 348                 f, err := fs.OpenFile("test", os.O_CREATE|os.O_RDWR, 0755)
 349                 c.Assert(err, check.IsNil)
 350                 defer f.Close()
 351                 fi, err = f.Stat()
 352                 c.Check(fi.Size(), check.Equals, size)
 353                 pos, err := f.Seek(0, os.SEEK_END)
 354                 c.Check(pos, check.Equals, size)
 355         }
 356
 357         f.Seek(2, os.SEEK_END)
 358         checkSize(0)
 359         f.Write([]byte{1})
 360         checkSize(3)
 361
 362         f.Seek(2, os.SEEK_CUR)
 363         checkSize(3)
 364         f.Write([]byte{})
 365         checkSize(5)
 366
 367         f.Seek(8, os.SEEK_SET)
 368         checkSize(5)
 369         n, err := f.Read(make([]byte, 1))
 370         c.Check(n, check.Equals, 0)
 371         c.Check(err, check.Equals, io.EOF)
 372         checkSize(5)
 373         f.Write([]byte{1, 2, 3})
 374         checkSize(11)
 375 }
 376
 377 func (s *CollectionFSSuite) TestMarshalSmallBlocks(c *check.C) {
 378         maxBlockSize = 8
 379         defer func() { maxBlockSize = 2 << 26 }()
 380
 381         var err error
 382         s.fs, err = (&Collection{}).FileSystem(s.client, s.kc)
 383         c.Assert(err, check.IsNil)
 384         for _, name := range []string{"foo", "bar", "baz"} {
 385                 f, err := s.fs.OpenFile(name, os.O_WRONLY|os.O_CREATE, 0)
 386                 c.Assert(err, check.IsNil)
 387                 f.Write([]byte(name))
 388                 f.Close()
 389         }
 390
 391         m, err := s.fs.MarshalManifest(".")
 392         c.Check(err, check.IsNil)
 393         m = regexp.MustCompile(`\+A[^\+ ]+`).ReplaceAllLiteralString(m, "")
 394         c.Check(m, check.Equals, ". c3c23db5285662ef7172373df0003206+6 acbd18db4cc2f85cedef654fccc4a4d8+3 0:3:bar 3:3:baz 6:3:foo\n")
 395 }
 396
 397 func (s *CollectionFSSuite) TestMkdir(c *check.C) {
 398         err := s.fs.Mkdir("foo/bar", 0755)
 399         c.Check(err, check.Equals, os.ErrNotExist)
 400
 401         f, err := s.fs.OpenFile("foo/bar", os.O_CREATE, 0)
 402         c.Check(err, check.Equals, os.ErrNotExist)
 403
 404         err = s.fs.Mkdir("foo", 0755)
 405         c.Check(err, check.IsNil)
 406
 407         f, err = s.fs.OpenFile("foo/bar", os.O_CREATE|os.O_WRONLY, 0)
 408         c.Check(err, check.IsNil)
 409         if err == nil {
 410                 defer f.Close()
 411                 f.Write([]byte("foo"))
 412         }
 413
 414         // mkdir fails if a file already exists with that name
 415         err = s.fs.Mkdir("foo/bar", 0755)
 416         c.Check(err, check.NotNil)
 417
 418         err = s.fs.Remove("foo/bar")
 419         c.Check(err, check.IsNil)
 420
 421         // mkdir succeds after the file is deleted
 422         err = s.fs.Mkdir("foo/bar", 0755)
 423         c.Check(err, check.IsNil)
 424
 425         // creating a file in a nonexistent subdir should still fail
 426         f, err = s.fs.OpenFile("foo/bar/baz/foo.txt", os.O_CREATE|os.O_WRONLY, 0)
 427         c.Check(err, check.Equals, os.ErrNotExist)
 428
 429         f, err = s.fs.OpenFile("foo/bar/foo.txt", os.O_CREATE|os.O_WRONLY, 0)
 430         c.Check(err, check.IsNil)
 431         if err == nil {
 432                 defer f.Close()
 433                 f.Write([]byte("foo"))
 434         }
 435
 436         // creating foo/bar as a regular file should fail
 437         f, err = s.fs.OpenFile("foo/bar", os.O_CREATE|os.O_EXCL, 0)
 438         c.Check(err, check.NotNil)
 439
 440         // creating foo/bar as a directory should fail
 441         f, err = s.fs.OpenFile("foo/bar", os.O_CREATE|os.O_EXCL, os.ModeDir)
 442         c.Check(err, check.NotNil)
 443         err = s.fs.Mkdir("foo/bar", 0755)
 444         c.Check(err, check.NotNil)
 445
 446         m, err := s.fs.MarshalManifest(".")
 447         c.Check(err, check.IsNil)
 448         m = regexp.MustCompile(`\+A[^\+ ]+`).ReplaceAllLiteralString(m, "")
 449         c.Check(m, check.Equals, "./dir1 3858f62230ac3c915f300c664312c63f+6 3:3:bar 0:3:foo\n./foo/bar acbd18db4cc2f85cedef654fccc4a4d8+3 0:3:foo.txt\n")
 450 }
 451
 452 func (s *CollectionFSSuite) TestConcurrentWriters(c *check.C) {
 453         maxBlockSize = 8
 454         defer func() { maxBlockSize = 2 << 26 }()
 455
 456         var wg sync.WaitGroup
 457         for n := 0; n < 128; n++ {
 458                 wg.Add(1)
 459                 go func() {
 460                         defer wg.Done()
 461                         f, err := s.fs.OpenFile("/dir1/foo", os.O_RDWR, 0)
 462                         c.Assert(err, check.IsNil)
 463                         defer f.Close()
 464                         for i := 0; i < 6502; i++ {
 465                                 switch rand.Int() & 3 {
 466                                 case 0:
 467                                         f.Truncate(int64(rand.Intn(64)))
 468                                 case 1:
 469                                         f.Seek(int64(rand.Intn(64)), os.SEEK_SET)
 470                                 case 2:
 471                                         _, err := f.Write([]byte("beep boop"))
 472                                         c.Check(err, check.IsNil)
 473                                 case 3:
 474                                         _, err := ioutil.ReadAll(f)
 475                                         c.Check(err, check.IsNil)
 476                                 }
 477                         }
 478                 }()
 479         }
 480         wg.Wait()
 481
 482         f, err := s.fs.OpenFile("/dir1/foo", os.O_RDWR, 0)
 483         c.Assert(err, check.IsNil)
 484         defer f.Close()
 485         buf, err := ioutil.ReadAll(f)
 486         c.Check(err, check.IsNil)
 487         c.Logf("after lots of random r/w/seek/trunc, buf is %q", buf)
 488 }
 489
 490 func (s *CollectionFSSuite) TestRandomWrites(c *check.C) {
 491         maxBlockSize = 40
 492         defer func() { maxBlockSize = 2 << 26 }()
 493
 494         var err error
 495         s.fs, err = (&Collection{}).FileSystem(s.client, s.kc)
 496         c.Assert(err, check.IsNil)
 497
 498         const nfiles = 256
 499         const ngoroutines = 256
 500
 501         var wg sync.WaitGroup
 502         for n := 0; n < nfiles; n++ {
 503                 wg.Add(1)
 504                 go func(n int) {
 505                         defer wg.Done()
 506                         expect := make([]byte, 0, 64)
 507                         wbytes := []byte("there's no simple explanation for anything important that any of us do")
 508                         f, err := s.fs.OpenFile(fmt.Sprintf("random-%d", n), os.O_RDWR|os.O_CREATE|os.O_EXCL, 0)
 509                         c.Assert(err, check.IsNil)
 510                         defer f.Close()
 511                         for i := 0; i < ngoroutines; i++ {
 512                                 trunc := rand.Intn(65)
 513                                 woff := rand.Intn(trunc + 1)
 514                                 wbytes = wbytes[:rand.Intn(64-woff+1)]
 515                                 for buf, i := expect[:cap(expect)], len(expect); i < trunc; i++ {
 516                                         buf[i] = 0
 517                                 }
 518                                 expect = expect[:trunc]
 519                                 if trunc < woff+len(wbytes) {
 520                                         expect = expect[:woff+len(wbytes)]
 521                                 }
 522                                 copy(expect[woff:], wbytes)
 523                                 f.Truncate(int64(trunc))
 524                                 pos, err := f.Seek(int64(woff), os.SEEK_SET)
 525                                 c.Check(pos, check.Equals, int64(woff))
 526                                 c.Check(err, check.IsNil)
 527                                 n, err := f.Write(wbytes)
 528                                 c.Check(n, check.Equals, len(wbytes))
 529                                 c.Check(err, check.IsNil)
 530                                 pos, err = f.Seek(0, os.SEEK_SET)
 531                                 c.Check(pos, check.Equals, int64(0))
 532                                 c.Check(err, check.IsNil)
 533                                 buf, err := ioutil.ReadAll(f)
 534                                 c.Check(string(buf), check.Equals, string(expect))
 535                                 c.Check(err, check.IsNil)
 536                         }
 537                         s.checkMemSize(c, f)
 538                 }(n)
 539         }
 540         wg.Wait()
 541
 542         root, err := s.fs.Open("/")
 543         c.Assert(err, check.IsNil)
 544         defer root.Close()
 545         fi, err := root.Readdir(-1)
 546         c.Check(err, check.IsNil)
 547         c.Check(len(fi), check.Equals, nfiles)
 548
 549         _, err = s.fs.MarshalManifest(".")
 550         c.Check(err, check.IsNil)
 551         // TODO: check manifest content
 552 }
 553
 554 func (s *CollectionFSSuite) TestRemove(c *check.C) {
 555         fs, err := (&Collection{}).FileSystem(s.client, s.kc)
 556         c.Assert(err, check.IsNil)
 557         err = fs.Mkdir("dir0", 0755)
 558         c.Assert(err, check.IsNil)
 559         err = fs.Mkdir("dir1", 0755)
 560         c.Assert(err, check.IsNil)
 561         err = fs.Mkdir("dir1/dir2", 0755)
 562         c.Assert(err, check.IsNil)
 563
 564         err = fs.Remove("dir0")
 565         c.Check(err, check.IsNil)
 566         err = fs.Remove("dir0")
 567         c.Check(err, check.Equals, os.ErrNotExist)
 568
 569         err = fs.Remove("dir1/dir2/")
 570         c.Check(err, check.Equals, ErrInvalidArgument)
 571         err = fs.Remove("dir1/dir2/.")
 572         c.Check(err, check.Equals, ErrInvalidArgument)
 573         err = fs.Remove("dir1/dir2/..")
 574         c.Check(err, check.Equals, ErrInvalidArgument)
 575         err = fs.Remove("dir1")
 576         c.Check(err, check.Equals, ErrDirectoryNotEmpty)
 577         err = fs.Remove("dir1/dir2/../../../dir1")
 578         c.Check(err, check.Equals, ErrDirectoryNotEmpty)
 579         err = fs.RemoveAll("dir1")
 580         c.Check(err, check.IsNil)
 581         err = fs.RemoveAll("dir1")
 582         c.Check(err, check.Equals, os.ErrNotExist)
 583 }
 584
 585 func (s *CollectionFSSuite) TestRename(c *check.C) {
 586         fs, err := (&Collection{}).FileSystem(s.client, s.kc)
 587         c.Assert(err, check.IsNil)
 588         const (
 589                 outer = 16
 590                 inner = 16
 591         )
 592         for i := 0; i < outer; i++ {
 593                 err = fs.Mkdir(fmt.Sprintf("dir%d", i), 0755)
 594                 c.Assert(err, check.IsNil)
 595                 for j := 0; j < inner; j++ {
 596                         err = fs.Mkdir(fmt.Sprintf("dir%d/dir%d", i, j), 0755)
 597                         c.Assert(err, check.IsNil)
 598                         for _, fnm := range []string{
 599                                 fmt.Sprintf("dir%d/file%d", i, j),
 600                                 fmt.Sprintf("dir%d/dir%d/file%d", i, j, j),
 601                         } {
 602                                 f, err := fs.OpenFile(fnm, os.O_CREATE|os.O_WRONLY, 0755)
 603                                 c.Assert(err, check.IsNil)
 604                                 _, err = f.Write([]byte("beep"))
 605                                 c.Assert(err, check.IsNil)
 606                                 f.Close()
 607                         }
 608                 }
 609         }
 610         var wg sync.WaitGroup
 611         for i := 0; i < outer; i++ {
 612                 for j := 0; j < inner; j++ {
 613                         wg.Add(1)
 614                         go func(i, j int) {
 615                                 defer wg.Done()
 616                                 oldname := fmt.Sprintf("dir%d/dir%d/file%d", i, j, j)
 617                                 newname := fmt.Sprintf("dir%d/newfile%d", i, inner-j-1)
 618                                 _, err := fs.Open(newname)
 619                                 c.Check(err, check.Equals, os.ErrNotExist)
 620                                 err = fs.Rename(oldname, newname)
 621                                 c.Check(err, check.IsNil)
 622                                 f, err := fs.Open(newname)
 623                                 c.Check(err, check.IsNil)
 624                                 f.Close()
 625                         }(i, j)
 626
 627                         wg.Add(1)
 628                         go func(i, j int) {
 629                                 defer wg.Done()
 630                                 // oldname does not exist
 631                                 err := fs.Rename(
 632                                         fmt.Sprintf("dir%d/dir%d/missing", i, j),
 633                                         fmt.Sprintf("dir%d/irelevant", outer-i-1))
 634                                 c.Check(err, check.ErrorMatches, `.*does not exist`)
 635
 636                                 // newname parent dir does not exist
 637                                 err = fs.Rename(
 638                                         fmt.Sprintf("dir%d/dir%d", i, j),
 639                                         fmt.Sprintf("dir%d/missing/irrelevant", outer-i-1))
 640                                 c.Check(err, check.ErrorMatches, `.*does not exist`)
 641
 642                                 // oldname parent dir is a file
 643                                 err = fs.Rename(
 644                                         fmt.Sprintf("dir%d/file%d/patherror", i, j),
 645                                         fmt.Sprintf("dir%d/irrelevant", i))
 646                                 c.Check(err, check.ErrorMatches, `.*does not exist`)
 647
 648                                 // newname parent dir is a file
 649                                 err = fs.Rename(
 650                                         fmt.Sprintf("dir%d/dir%d/file%d", i, j, j),
 651                                         fmt.Sprintf("dir%d/file%d/patherror", i, inner-j-1))
 652                                 c.Check(err, check.ErrorMatches, `.*does not exist`)
 653                         }(i, j)
 654                 }
 655         }
 656         wg.Wait()
 657
 658         f, err := fs.OpenFile("dir1/newfile3", 0, 0)
 659         c.Assert(err, check.IsNil)
 660         c.Check(f.Size(), check.Equals, int64(4))
 661         buf, err := ioutil.ReadAll(f)
 662         c.Check(buf, check.DeepEquals, []byte("beep"))
 663         c.Check(err, check.IsNil)
 664         _, err = fs.Open("dir1/dir1/file1")
 665         c.Check(err, check.Equals, os.ErrNotExist)
 666 }
 667
 668 func (s *CollectionFSSuite) TestPersist(c *check.C) {
 669         maxBlockSize = 1024
 670         defer func() { maxBlockSize = 2 << 26 }()
 671
 672         var err error
 673         s.fs, err = (&Collection{}).FileSystem(s.client, s.kc)
 674         c.Assert(err, check.IsNil)
 675         err = s.fs.Mkdir("d:r", 0755)
 676         c.Assert(err, check.IsNil)
 677
 678         expect := map[string][]byte{}
 679
 680         var wg sync.WaitGroup
 681         for _, name := range []string{"random 1", "random:2", "random\\3", "d:r/random4"} {
 682                 buf := make([]byte, 500)
 683                 rand.Read(buf)
 684                 expect[name] = buf
 685
 686                 f, err := s.fs.OpenFile(name, os.O_WRONLY|os.O_CREATE, 0)
 687                 c.Assert(err, check.IsNil)
 688                 // Note: we don't close the file until after the test
 689                 // is done. Writes to unclosed files should persist.
 690                 defer f.Close()
 691
 692                 wg.Add(1)
 693                 go func() {
 694                         defer wg.Done()
 695                         for i := 0; i < len(buf); i += 5 {
 696                                 _, err := f.Write(buf[i : i+5])
 697                                 c.Assert(err, check.IsNil)
 698                         }
 699                 }()
 700         }
 701         wg.Wait()
 702
 703         m, err := s.fs.MarshalManifest(".")
 704         c.Check(err, check.IsNil)
 705         c.Logf("%q", m)
 706
 707         root, err := s.fs.Open("/")
 708         c.Assert(err, check.IsNil)
 709         defer root.Close()
 710         fi, err := root.Readdir(-1)
 711         c.Check(err, check.IsNil)
 712         c.Check(len(fi), check.Equals, 4)
 713
 714         persisted, err := (&Collection{ManifestText: m}).FileSystem(s.client, s.kc)
 715         c.Assert(err, check.IsNil)
 716
 717         root, err = persisted.Open("/")
 718         c.Assert(err, check.IsNil)
 719         defer root.Close()
 720         fi, err = root.Readdir(-1)
 721         c.Check(err, check.IsNil)
 722         c.Check(len(fi), check.Equals, 4)
 723
 724         for name, content := range expect {
 725                 c.Logf("read %q", name)
 726                 f, err := persisted.Open(name)
 727                 c.Assert(err, check.IsNil)
 728                 defer f.Close()
 729                 buf, err := ioutil.ReadAll(f)
 730                 c.Check(err, check.IsNil)
 731                 c.Check(buf, check.DeepEquals, content)
 732         }
 733 }
 734
 735 func (s *CollectionFSSuite) TestPersistEmptyFiles(c *check.C) {
 736         var err error
 737         s.fs, err = (&Collection{}).FileSystem(s.client, s.kc)
 738         c.Assert(err, check.IsNil)
 739         for _, name := range []string{"dir", "dir/zerodir", "zero", "zero/zero"} {
 740                 err = s.fs.Mkdir(name, 0755)
 741                 c.Assert(err, check.IsNil)
 742         }
 743
 744         expect := map[string][]byte{
 745                 "0":                nil,
 746                 "00":               []byte{},
 747                 "one":              []byte{1},
 748                 "dir/0":            nil,
 749                 "dir/two":          []byte{1, 2},
 750                 "dir/zero":         nil,
 751                 "dir/zerodir/zero": nil,
 752                 "zero/zero/zero":   nil,
 753         }
 754         for name, data := range expect {
 755                 f, err := s.fs.OpenFile(name, os.O_WRONLY|os.O_CREATE, 0)
 756                 c.Assert(err, check.IsNil)
 757                 if data != nil {
 758                         _, err := f.Write(data)
 759                         c.Assert(err, check.IsNil)
 760                 }
 761                 f.Close()
 762         }
 763
 764         m, err := s.fs.MarshalManifest(".")
 765         c.Check(err, check.IsNil)
 766         c.Logf("%q", m)
 767
 768         persisted, err := (&Collection{ManifestText: m}).FileSystem(s.client, s.kc)
 769         c.Assert(err, check.IsNil)
 770
 771         for name, data := range expect {
 772                 f, err := persisted.Open("bogus-" + name)
 773                 c.Check(err, check.NotNil)
 774
 775                 f, err = persisted.Open(name)
 776                 c.Assert(err, check.IsNil)
 777
 778                 if data == nil {
 779                         data = []byte{}
 780                 }
 781                 buf, err := ioutil.ReadAll(f)
 782                 c.Check(err, check.IsNil)
 783                 c.Check(buf, check.DeepEquals, data)
 784         }
 785 }
 786
 787 func (s *CollectionFSSuite) TestOpenFileFlags(c *check.C) {
 788         fs, err := (&Collection{}).FileSystem(s.client, s.kc)
 789         c.Assert(err, check.IsNil)
 790
 791         f, err := fs.OpenFile("missing", os.O_WRONLY, 0)
 792         c.Check(f, check.IsNil)
 793         c.Check(err, check.ErrorMatches, `file does not exist`)
 794
 795         f, err = fs.OpenFile("new", os.O_CREATE|os.O_RDONLY, 0)
 796         c.Assert(err, check.IsNil)
 797         defer f.Close()
 798         n, err := f.Write([]byte{1, 2, 3})
 799         c.Check(n, check.Equals, 0)
 800         c.Check(err, check.ErrorMatches, `read-only file`)
 801         n, err = f.Read(make([]byte, 1))
 802         c.Check(n, check.Equals, 0)
 803         c.Check(err, check.Equals, io.EOF)
 804         f, err = fs.OpenFile("new", os.O_RDWR, 0)
 805         c.Assert(err, check.IsNil)
 806         defer f.Close()
 807         _, err = f.Write([]byte{4, 5, 6})
 808         c.Check(err, check.IsNil)
 809         fi, err := f.Stat()
 810         c.Assert(err, check.IsNil)
 811         c.Check(fi.Size(), check.Equals, int64(3))
 812
 813         f, err = fs.OpenFile("new", os.O_TRUNC|os.O_RDWR, 0)
 814         c.Assert(err, check.IsNil)
 815         defer f.Close()
 816         pos, err := f.Seek(0, os.SEEK_END)
 817         c.Check(pos, check.Equals, int64(0))
 818         c.Check(err, check.IsNil)
 819         fi, err = f.Stat()
 820         c.Assert(err, check.IsNil)
 821         c.Check(fi.Size(), check.Equals, int64(0))
 822         fs.Remove("new")
 823
 824         buf := make([]byte, 64)
 825         f, err = fs.OpenFile("append", os.O_EXCL|os.O_CREATE|os.O_RDWR|os.O_APPEND, 0)
 826         c.Assert(err, check.IsNil)
 827         f.Write([]byte{1, 2, 3})
 828         f.Seek(0, os.SEEK_SET)
 829         n, _ = f.Read(buf[:1])
 830         c.Check(n, check.Equals, 1)
 831         c.Check(buf[:1], check.DeepEquals, []byte{1})
 832         pos, err = f.Seek(0, os.SEEK_CUR)
 833         c.Check(pos, check.Equals, int64(1))
 834         f.Write([]byte{4, 5, 6})
 835         pos, err = f.Seek(0, os.SEEK_CUR)
 836         c.Check(pos, check.Equals, int64(6))
 837         f.Seek(0, os.SEEK_SET)
 838         n, err = f.Read(buf)
 839         c.Check(buf[:n], check.DeepEquals, []byte{1, 2, 3, 4, 5, 6})
 840         c.Check(err, check.Equals, io.EOF)
 841         f.Close()
 842
 843         f, err = fs.OpenFile("append", os.O_RDWR|os.O_APPEND, 0)
 844         c.Assert(err, check.IsNil)
 845         pos, err = f.Seek(0, os.SEEK_CUR)
 846         c.Check(pos, check.Equals, int64(0))
 847         c.Check(err, check.IsNil)
 848         f.Read(buf[:3])
 849         pos, _ = f.Seek(0, os.SEEK_CUR)
 850         c.Check(pos, check.Equals, int64(3))
 851         f.Write([]byte{7, 8, 9})
 852         pos, err = f.Seek(0, os.SEEK_CUR)
 853         c.Check(pos, check.Equals, int64(9))
 854         f.Close()
 855
 856         f, err = fs.OpenFile("wronly", os.O_CREATE|os.O_WRONLY, 0)
 857         c.Assert(err, check.IsNil)
 858         n, err = f.Write([]byte{3, 2, 1})
 859         c.Check(n, check.Equals, 3)
 860         c.Check(err, check.IsNil)
 861         pos, _ = f.Seek(0, os.SEEK_CUR)
 862         c.Check(pos, check.Equals, int64(3))
 863         pos, _ = f.Seek(0, os.SEEK_SET)
 864         c.Check(pos, check.Equals, int64(0))
 865         n, err = f.Read(buf)
 866         c.Check(n, check.Equals, 0)
 867         c.Check(err, check.ErrorMatches, `.*O_WRONLY.*`)
 868         f, err = fs.OpenFile("wronly", os.O_RDONLY, 0)
 869         c.Assert(err, check.IsNil)
 870         n, _ = f.Read(buf)
 871         c.Check(buf[:n], check.DeepEquals, []byte{3, 2, 1})
 872
 873         f, err = fs.OpenFile("unsupported", os.O_CREATE|os.O_SYNC, 0)
 874         c.Check(f, check.IsNil)
 875         c.Check(err, check.NotNil)
 876
 877         f, err = fs.OpenFile("append", os.O_RDWR|os.O_WRONLY, 0)
 878         c.Check(f, check.IsNil)
 879         c.Check(err, check.ErrorMatches, `invalid flag.*`)
 880 }
 881
 882 func (s *CollectionFSSuite) TestFlushFullBlocks(c *check.C) {
 883         maxBlockSize = 1024
 884         defer func() { maxBlockSize = 2 << 26 }()
 885
 886         fs, err := (&Collection{}).FileSystem(s.client, s.kc)
 887         c.Assert(err, check.IsNil)
 888         f, err := fs.OpenFile("50K", os.O_WRONLY|os.O_CREATE, 0)
 889         c.Assert(err, check.IsNil)
 890         defer f.Close()
 891
 892         data := make([]byte, 500)
 893         rand.Read(data)
 894
 895         for i := 0; i < 100; i++ {
 896                 n, err := f.Write(data)
 897                 c.Assert(n, check.Equals, len(data))
 898                 c.Assert(err, check.IsNil)
 899         }
 900
 901         currentMemExtents := func() (memExtents []int) {
 902                 for idx, e := range f.(*file).inode.(*filenode).extents {
 903                         switch e.(type) {
 904                         case *memExtent:
 905                                 memExtents = append(memExtents, idx)
 906                         }
 907                 }
 908                 return
 909         }
 910         c.Check(currentMemExtents(), check.HasLen, 1)
 911
 912         m, err := fs.MarshalManifest(".")
 913         c.Check(m, check.Matches, `[^:]* 0:50000:50K\n`)
 914         c.Check(err, check.IsNil)
 915         c.Check(currentMemExtents(), check.HasLen, 0)
 916 }
 917
 918 func (s *CollectionFSSuite) TestBrokenManifests(c *check.C) {
 919         for _, txt := range []string{
 920                 "\n",
 921                 ".\n",
 922                 ". \n",
 923                 ". d41d8cd98f00b204e9800998ecf8427e+0\n",
 924                 ". d41d8cd98f00b204e9800998ecf8427e+0 \n",
 925                 ". 0:0:foo\n",
 926                 ".  0:0:foo\n",
 927                 ". 0:0:foo 0:0:bar\n",
 928                 ". d41d8cd98f00b204e9800998ecf8427e 0:0:foo\n",
 929                 ". d41d8cd98f00b204e9800998ecf8427e+0 0:0:foo:bar\n",
 930                 ". d41d8cd98f00b204e9800998ecf8427e+0 foo:0:foo\n",
 931                 ". d41d8cd98f00b204e9800998ecf8427e+0 0:foo:foo\n",
 932                 ". d41d8cd98f00b204e9800998ecf8427e+1 0:1:foo 1:1:bar\n",
 933                 ". d41d8cd98f00b204e9800998ecf8427e+1 0:0:foo\n./foo d41d8cd98f00b204e9800998ecf8427e+1 0:0:bar\n",
 934                 "./foo d41d8cd98f00b204e9800998ecf8427e+1 0:0:bar\n. d41d8cd98f00b204e9800998ecf8427e+1 0:0:foo\n",
 935         } {
 936                 c.Logf("<-%q", txt)
 937                 fs, err := (&Collection{ManifestText: txt}).FileSystem(s.client, s.kc)
 938                 c.Check(fs, check.IsNil)
 939                 c.Logf("-> %s", err)
 940                 c.Check(err, check.NotNil)
 941         }
 942 }
 943
 944 func (s *CollectionFSSuite) TestEdgeCaseManifests(c *check.C) {
 945         for _, txt := range []string{
 946                 "",
 947                 ". d41d8cd98f00b204e9800998ecf8427e+0 0:0:foo\n",
 948                 ". d41d8cd98f00b204e9800998ecf8427e+0 0:0:foo 0:0:foo 0:0:bar\n",
 949                 ". d41d8cd98f00b204e9800998ecf8427e+0 0:0:foo 0:0:foo 0:0:bar\n",
 950                 ". d41d8cd98f00b204e9800998ecf8427e+0 0:0:foo/bar\n./foo d41d8cd98f00b204e9800998ecf8427e+0 0:0:bar\n",
 951         } {
 952                 c.Logf("<-%q", txt)
 953                 fs, err := (&Collection{ManifestText: txt}).FileSystem(s.client, s.kc)
 954                 c.Check(err, check.IsNil)
 955                 c.Check(fs, check.NotNil)
 956         }
 957 }
 958
 959 func (s *CollectionFSSuite) checkMemSize(c *check.C, f File) {
 960         fn := f.(*file).inode.(*filenode)
 961         var memsize int64
 962         for _, ext := range fn.extents {
 963                 if e, ok := ext.(*memExtent); ok {
 964                         memsize += int64(len(e.buf))
 965                 }
 966         }
 967         c.Check(fn.memsize, check.Equals, memsize)
 968 }
 969
 970 type CollectionFSUnitSuite struct{}
 971
 972 var _ = check.Suite(&CollectionFSUnitSuite{})
 973
 974 // expect ~2 seconds to load a manifest with 256K files
 975 func (s *CollectionFSUnitSuite) TestLargeManifest(c *check.C) {
 976         const (
 977                 dirCount  = 512
 978                 fileCount = 512
 979         )
 980
 981         mb := bytes.NewBuffer(make([]byte, 0, 40000000))
 982         for i := 0; i < dirCount; i++ {
 983                 fmt.Fprintf(mb, "./dir%d", i)
 984                 for j := 0; j <= fileCount; j++ {
 985                         fmt.Fprintf(mb, " %032x+42+A%040x@%08x", j, j, j)
 986                 }
 987                 for j := 0; j < fileCount; j++ {
 988                         fmt.Fprintf(mb, " %d:%d:dir%d/file%d", j*42+21, 42, j, j)
 989                 }
 990                 mb.Write([]byte{'\n'})
 991         }
 992         coll := Collection{ManifestText: mb.String()}
 993         c.Logf("%s built", time.Now())
 994
 995         var memstats runtime.MemStats
 996         runtime.ReadMemStats(&memstats)
 997         c.Logf("%s Alloc=%d Sys=%d", time.Now(), memstats.Alloc, memstats.Sys)
 998
 999         f, err := coll.FileSystem(nil, nil)
1000         c.Check(err, check.IsNil)
1001         c.Logf("%s loaded", time.Now())
1002
1003         for i := 0; i < dirCount; i++ {
1004                 for j := 0; j < fileCount; j++ {
1005                         f.Stat(fmt.Sprintf("./dir%d/dir%d/file%d", i, j, j))
1006                 }
1007         }
1008         c.Logf("%s Stat() x %d", time.Now(), dirCount*fileCount)
1009
1010         runtime.ReadMemStats(&memstats)
1011         c.Logf("%s Alloc=%d Sys=%d", time.Now(), memstats.Alloc, memstats.Sys)
1012 }
1013
1014 // Gocheck boilerplate
1015 func Test(t *testing.T) {
1016         check.TestingT(t)
1017 }